pulp equipment spare parts- Factory Manufacturers Suppliers From China

The performance and characteristics of the pulp press

Gravity double-wire press is pulping equipment and belongs to the category of equipment accessories. So, what is its performance and characteristics? Let me introduce it to you below.

Usually, scientific design and reasonable layout ensure that the gravity double-wire press has high-efficiency dewatering performance. The main dewatering press roller adopts strip design, which not only increases the processing capacity, but also enables the slurry to be dewatered quickly on both sides of the filter belt, shortening the dewatering time. The arrangement of the smaller pressure rollers at the back and the change of the contact angle of the filter belt ensure the best combination of pressure and shear force, thereby greatly improving the slurry concentration and dewatering efficiency.

The tension of the filter belt is achieved by an inflated air cylinder, so that the entire filter belt maintains a constant tension. At the same time, the change of tension will not be caused by the change of feed amount, which is convenient for operation and management. The machine has an air pressure control system that automatically detects the position of the filter belt on the pressure roller and automatically corrects the deviation.

The above is the introduction of the performance and characteristics of the gravity double-wire press.

In my country's vacuum pump industry, from the perspective of the customer's market, it is mainly divided into three categories: the first foreign brand water ring vacuum pump, which is mainly based on sub-factories or cooperative agents in my country. It is characterized by high price, good after-sales, and relatively strict and complicated procedures. The second domestic large-brand water ring vacuum pump manufacturer in my country mostly learns foreign advanced technology and further develops and researches it, which is more suitable for the situation of various enterprises in my country, and some parts are also domestic and foreign brands. The characteristic is moderate price, after-sales service is also very good, the procedure is simple, dispatch technical engineer to maintain or return directly to the factory for repair. The third type of workshop-type vacuum pump factory has a large number, and the network publicity is very good. Both foreign and domestic brand vacuum pump factories have quality assurance. After decades, they have been well-known at home and abroad, but there is not much network promotion and advertising promotion. It also provides a certain market space for small vacuum pump factories. Features: Low price, not in place after sale. The prices of water ring vacuum pumps of the same model and the same material sold by different "manufacturers" are very different. The price of water ring vacuum pumps ranges from hundreds to thousands, or even tens to hundreds of thousands. Of course, the low price also makes "the product quality and service of vacuum pump manufacturers greatly reduced. There are more OEMs, which happen frequently. These existing conditions have caused market chaos and made users at a loss.

Which water ring vacuum pump is of better quality? How to choose a water ring vacuum pump manufacturer? Pay attention to the following aspects when purchasing:

1. Investigation. Which domestic famous brand Water Ring Vacuum Pump factories are there, and their basic information, qualifications, products, business years, and legal disputes. Learn about the social response and reputation of the cooperative enterprise's water ring pump usage.

2. Visit. Site inspection and technical exchange. Take a look at the scale, operation, technical level and production process of the water ring vacuum pump factory, and the production of parts.

3. Choose. If the purchase amount is small, you can ask the manufacturer to quote the proposal according to your own working conditions and just choose one. If the quantity is large, you can also choose one through bidding. The bidding documents contain detailed information, basic information, qualifications and patent certificates, cooperation cases and contracts, vacuum schemes and quotations of each water ring pump factory (in the detailed bidding information, there will also be brands of parts used).

In summary, Water Ring Vacuum Pump recommends that domestic brand water ring vacuum pump manufacturers can basically guarantee the manufacturer's production mode, product quality requirements and after-sales service standards. The water ring vacuum pump manufacturers with good faith and reputation will not make wild demands. This kind of water ring vacuum pumps with good quality water ring pump factories usually don't advertise much. They rely on word of mouth for decades and take quality as the foundation of the company. There is no advertising fee, and no middleman makes the difference, so not only the price is fair, but the after-sales service is also very thoughtful. Shandong Easttai started as a water ring vacuum pump, providing suitable solutions for users’ vacuum systems, ensuring that each product undergoes rigorous testing before leaving the factory. The products are sold throughout the country with stable performance, reliable quality, timely delivery and thoughtful service. , The good reputation remains the same.

In recent years, China's paper-making machinery industry has been faced with the continuous increase in the cost of paper-making equipment and raw materials at home, as well as the impact of foreign economic crises, as well as the dual pressure of exclusion and suppression of China's paper-making machinery industry. Entrepreneurs in China's paper-making machinery industry We need to think calmly, what direction should China's paper machinery industry go in next?

Although the pressure is not small, the prospect of the paper industry is still very good, and its development policy is also very positive. In order to promote the continuous progress of the industry, the paper industry in 2019 will have the following development trends:

1. Concentrate China's paper-making machinery industry. China's paper-making machinery industry is too scattered, especially small and medium-sized enterprises, and its regional distribution is not concentrated enough.

2. Strengthen the density of cooperation between the paper machinery industry. Before, the cooperation between China's paper machinery industry was not extensive enough. This can achieve a mutually beneficial and win-win situation. Why not do it?

3. Increase the scientific research expenses of paper-making machinery, reduce the dependence on foreign equipment and technology, and improve the technical content of domestic paper-making machinery products.

The paper machine is a complete set of equipment that makes the pulp form the paper web, including the headbox, wire section, press section, drying section, calender, paper reel, as well as the main engine such as the transmission section and steam, water, vacuum , lubrication, heat recovery and other auxiliary systems. The wire part that forms the wet paper web is the core of the paper machine, so the paper machine can be divided into fourdrinier wire paper machine, clip wire paper machine and rotary wire paper machine according to the structure of the wire part.

The headbox is a device that uniformly and stably sends the slurry of appropriate concentration to the net through the pulp distributor, rectifier, weir tank, weir plate nozzle and other components, also known as the head box; the slurry is sprayed from the headbox to the copper After the wire, the wet paper sheet is formed on the wire part and dehydrated; after that, the pressing, that is, the moisture of the wet paper sheet from the wire part is mechanically squeezed out, the dryness of the paper sheet is improved, and the surface properties of the paper sheet are improved at the same time. , eliminate the net marks and increase the smoothness, tightness and strength; then enter the drying section to further dehydrate the wet paper sheet after pressing, so that the paper sheet shrinks, the fibers are tightly combined and the strength is increased.

After the paper sheet coming out of the drying section is calendered by the calender, the smoothness, gloss and tightness of the paper sheet can be improved, the thickness of the paper sheet can be uniform across the whole width, and the air permeability can be reduced; The web is rolled into a paper roll, that is, the main process of papermaking is completed. In order to meet different needs in the future, there are also super calenders, rewinders, paper cutters, etc. after the reel in the paper workshop.

The paper industry consumes a lot of raw materials, water, electricity and chemicals, and produces a lot of waste water and waste residue. Therefore, the future of papermaking machinery will develop towards the use of a wide range of papermaking raw materials, reducing material and energy consumption in the papermaking process, and reducing environmental pollution.

      Belt conveyors have been applied to various fields because of their stable operation and continuous transportation capacity. Conveyor belt is the key component of belt conveyor, as well as material installation and traction belt. The section where the conveyor belt bears materials is called the installation section, and the return section is called the full load section. Common core materials include cotton white canvas, polyester white canvas, and galvanized steel wire rope.

      The bandwidth and speed of the conveyor belt are critical to the throughput of the belt conveyor. How to choose a suitable bandwidth and speed for sharing.

　　1, bandwidth

　　 Generally speaking, for a given belt speed, the conveying capacity of the belt conveyor increases with the expansion of the overall width of the conveyor belt, but the overall width of the narrow conveyor belt is likely to lie in the particle size distribution of the material being transported. The conveyor belt must have sufficient overall width, so that the small lumps to be conveyed and the lumps in the powdery mixture will not be installed close to the edge of the conveyor belt, and the internal specifications of the feeding trough and the spacing between the guide troughs It must be enough to make the mixture of various particle size distributions based without blocking.

　　2, belt speed

　　The suitable belt speed lies at a very large level in the characteristics of the material being conveyed, the required conveying capacity and the supporting force of the selected conveyor belt. Powdered materials should be transported at the lowest possible speed to reduce dust on the construction site, especially at the feeding and dumping places. The ductile material should also limit the speed of the conveyor belt. Because the conveyor belt and the easily broken materials being conveyed vibrate on the buffer roller, the belt speed must be low so that the ductile material will not be broken at the feeding point and the dumping point. Heavy materials with sharp edges and corners should be transported at a medium level of speed. Because the sharp edges and corners of the materials are likely to wear too much to the covering viscose of the conveyor belt, especially when the material moves along the conveyor belt at a safe discharge speed This is especially true when it is significantly lower than the conveyor speed.

　　 The selection of belt speed should consider the following factors:

　　 Bandwidth: The smaller the total width of the tape, the less stable it is during high-speed operation, and it is even more likely to cause a more serious spattering situation. Mobile conveyor: The installation quality is generally higher, and higher belt speeds can be used, and the speed of semi-mobile and portable conveyors is lower. The speed can be higher when the conveying is level or tends to level. The larger the inclination angle, the easier the material will be turned or dragged. A lower speed should be selected. Belt conveyor with skewed installation: Relatively speaking, the lower speed belt conveyor needs to have a lower speed, because the material is easier to flip and drag on the tape during the downward transportation. The greater the ton-kilometer value of the conveying capacity, the greater the compressive strength of the tape required. In order to reduce the compressive strength of the tape, a higher speed can be used. The bending of the tape on the drum: the impact of loading and the impact of the material cause the tape to wear out, so the short-circuit conveyor slows down. But in order to reduce the supporting force of the tape, long-distance conveyors often choose high-speed operation.

      The belt conveyor can carry out the transportation volume specified by the system software, which is determined by the network bandwidth and belt speed. The belt speed is very harmful to the belt conveyor's network bandwidth, its own weight, project cost and work quality. Under the same transport capacity standard, it is possible to choose two schemes: large network bandwidth and low bandwidth or smaller network bandwidth and high bandwidth. The following factors should be considered when selecting belt speed:

The characteristics of conveying materials and processing technology regulations

　　(1) For materials with small abrasiveness and small particles, such as coal, grains, sand, etc., a higher speed (generally 2~2m/s) should be used.

　　(2) Low-speed gears (within 1.25-1m/s) should be used for materials with high abrasiveness, lumpiness and fear of crushing, such as lump coal, lump iron ore, and coke.

　　(3) For powdery materials or materials that are prone to dust on the construction site such as a large amount of smoke and dust, in order to prevent smoke and dust from flying, a low speed gear (≤1.0M/s) should be adopted.

　　(4) Low-speed gears (≤1.25m/s) should be adopted for the places where cargo, easy-to-turn materials or high sanitary standards are required.

      Belt conveyor layout and material dumping method

　　(1) The belt conveyor with longer distance and level can choose higher belt speed.

　　(2) For belt conveyors with large inclination angles or short conveying intervals, the belt speed should be reduced as much as possible.

　　(3) When selecting the dumping car for dumping, because the specific inclination angle of the conveyor belt entering the dumping car is very large, the belt speed is not suitable for too high, generally not exceeding 3.15m/s.

　　(4) When the plow-shaped ash unloading valve is used to pour the material, because of the additional frictional resistance and wear, the belt speed is not suitable to exceed 2.8m/s.

　　(5) The belt speed of the downward belt conveyor with a large inclination angle is not suitable to exceed 3.15m/s.

What kind of accidents are easily caused by improper use of papermaking machinery and equipment in daily operations? Zhucheng Tiangong Paper Machinery Co., Ltd. will share with you.

1. The damage caused by the rotating movement of the parts of the equipment, such as pulp and paper machinery, calenders, rewinders, dryers, gears, pulleys, drive shafts, etc. in the equipment are all rotated. The main forms of personal injury caused by rotating motion are entanglement, strangulation, crushing, cutting and object hitting.

2. The damage caused by the electrical system, the equipment we use in the factory, its power is basically electric energy, so each mechanical equipment has its own electrical system, mainly including motors, distribution boxes, etc., the electrical system is easy to cause Accidents are dominated by clicks.

3. In addition to the above injuries, some other masters may also be caused. For example, in the process of using papermaking machinery and equipment, there will be dust and harmful substances, etc., which will be inhaled by the human body or pollute the environment. Sparks may be generated due to friction due to insufficient lubricating oil, which may cause personal injury or property damage.

In daily use, we should also improve the safety awareness and use standardization of operators. Equipment operators should undergo technical training to master the performance and operating procedures of the equipment. damage and reduce harm. The equipment should be regularly inspected and maintained, and the maintenance also needs to arrange professional personnel to operate, record the data, and establish a management system. Unsafe hidden dangers need to be eliminated in time.

With the continuous advancement of science and technology, the paper industry has also developed. In the paper production process, a large number of paper machines are used, and mechanical failures will inevitably occur. At this time, measures should be taken in time and the correct maintenance method should be selected to ensure that the papermaking equipment can operate normally and safely.

A typical feature of modern Paper machine failures.

The typical characteristics of modern Paper machine failures mainly include: the complexity of causality, hidden failure points and the uncertainty of related factors. These three characteristics are discussed in detail below.

1. The complexity of causes and consequences.

In terms of failures, symptoms, and causes of mechanical systems, there are overlapping parts. Generally, when a mechanical system fails, there are many causes. For example, the speed of the hydraulic drive element is too slow, the load is too large, the lubrication is poor, and the guide rail error is large. Similarly, a fault source can reflect multiple symptoms; a symptom can also be caused by multiple fault sources.

2. The point of failure is not obvious.

Some faults occur inside the mechanical system, such as system failure and damage, which are often caused by the inside of the mechanical system. At present, the domestic papermaking machinery system is becoming more and more complicated, but it lacks effective detection equipment. It is time-consuming and laborious to remove the cause of failure, which also increases the difficulty of judging the cause of the failure to a certain extent. Nowadays, the most effective method for judging symptoms is to observe directly with the naked eye; in addition, there are many reasons that cause mechanical failures, so it is difficult to analyze mechanical failures.

3. Uncertain related factors.

In the daily operation of the paper machine, due to the failure of the mechanical system, various reasons are caused, such as the voltage change of the power grid, the temperature change of the machine and the intrusion of pollutants. The uncertainty of related factors is also manifested in other aspects such as non-steady state, nonlinear and non-Gaussian distribution. The invisible fault characteristics formed by such faults will lead to situations in which the source of mechanical faults cannot be accurately determined.

The complete part of the paper machine finishing section, the complete set of equipment that links the pulp to the paper web is called the paper machine, which includes the head box, wire section, press section, drying section, calender, roll machine and transmission section. Main machine and auxiliary systems such as steam, water, vacuum, lubrication, heat recovery, etc.

　　Multi-process treatment to achieve good surface quality. Most papers are calendered by a mechanical calender behind the paper machine to make the paper smooth and consistent. The mechanical calender is made of several cold cast iron rollers, and the paper surface is flattened by the weight of each roller or another pressure. If a higher surface smoothness is required, use a super calender to calender. It is generally composed of pulp rolls and cold cast iron rolls arranged alternately. According to different usage requirements, some varieties need surface sizing to improve surface quality; some have to be surface coated to improve appearance quality or printing quality. Surface sizing and coating can be processed with paper forming outside the paper machine through the sizing machine and coating machine, or the sizing machine and coating equipment can be combined in the paper machine for in-machine processing.

The methods of improving the evenness of the paper machine are generally as follows:

1. Reduce the proportion of long fibers:

The ratio of pulp is changed from the original 20%: 80% to 10%: 90%, so that the ratio of medium and long fibers to short fibers is reduced from the original 20%: 80%.

The longer the fibers in the pulp, the more serious the flocculation, reducing the long fiber ratio can effectively improve the uniformity of the paper sheet, and at the same time, it should be ensured that the long fiber ratio does not exceed 0.3% when surfing the Internet.

2. Breeding of long-fiber wood varieties:

The fibers of northern coniferous pine pulp are relatively fine, and spruce, fir, and hemlock can all produce better paper.

The fibers of southern pine coniferous wood pulp are thick and stiff, such as loblolly pine and Douglas fir, which have good tear resistance, but have a great influence on the uniformity of paper.

The wood pulp produced in Canada has a single tree species, long production period and good materials. Therefore, the selection of Canadian wood pulp varieties generally depends on the Canadian wood pulp varieties.

3. Set the deaerator:

The amount of degassing is very important to obtain good uniformity, and the residual air in the net seriously affects the dehydration uniformity and fiber distribution.

For slurry streaming, 0.1% of the air mass is equivalent to 25% of the total fiber volume.

The degassing device is located after the desander and before the pressure screen.

4. Adjust the mass fraction of the mesh slurry:

5. Adjust the landing point of the online slurry:

Change the position of the lower weir plate so that the lower weir plate protrudes from the upper lip plate by 15~20mm.

Therefore, the spray angle is reduced, the point of contact is located at the front edge of the forming plate, the severe dehydration of the breast roller is slowed down, the screen printing weight caused by the large spray angle and high forming pressure is avoided, the retention rate is low, and the slurry channel is easily formed. and other disadvantages.

6. To maintain the necessary vibration of the pulp:

①Increase the slurry level of the head box slurry, so that the pressure increases, the flow rate increases, and the turbulent motion is accelerated.

②Use a good vibrating mesh device.

③Adjust the finish roller.

The installation position of the decorative roller, after the first vacuum box or after the vacuum box, the free mesh surface under the decorative roller should be equal to the diameter of the decorative roller.

The free mesh surface is 1/3 at the front of the roller and 2/3 at the back of the roller. The depth of the pressing layer is adjusted from 4mm to 6mm, and the mass fraction of the slurry in the lower part of the roller of the decoration machine is 2~2.5%.

The operation of the paper cutter is relatively simple, and the requirements on the environment are not high. Usually in the general office, the power supply can be used to ensure power supply to work. Generally, the paper cutter has an automatic switch system. As long as the old paper is lost during the input, the paper cutter will automatically rotate to shred the paper. Some paper cutters need to press the start button once, and the cutter will rotate to continue cutting. After shredding, press the stop / reverse key to stop the cutter from rotating.

Before shredding paper, you should check whether there are hard objects such as paper clips and staples on the documents to be shredded. If there is, it should be removed and put into the paper port, otherwise the cutter may be damaged. When using the paper cutter, be careful not to jam too much paper at a time, especially paper of better quality, and pay more attention when using it, so as to avoid paper jams. Try not to skew the paper when loading it. The paper should be placed in the center of the paper inlet as much as possible.

For early products, once a paper jam occurs during use, you should press the rewind key or the stop key to enable the crush to continue to be used. Most paper cutters are equipped with overload and power-off protection devices. When the motor overloads and heats up, it will automatically stop. At this time, the use of 20-30min should be stopped to cool the motor. At the same time, when using it again, you should consider appropriately reducing the amount of input paper. The more advanced paper cutter will automatically stop and automatically eject the paper once it is overloaded, which is more convenient to use. When the box of the paper cutter is full, some machines will automatically make a sound to remind people to remove paper scraps in time.

Felt: Fabric felt used in paper forming and conveying in the paper industry.

Good dehydration, smoothness, dirt resistance, abrasion resistance, dimensional stability, chemical resistance, antibacterial, heat resistance and hydrolysis resistance are required.

The processing method is to first make a thick and thin base cloth with synthetic fibers, and then spread a mixed fiber net of synthetic fibers and a small amount of wool, which is made by needle punching, chemical treatment, resin finishing and heat setting.

For paper forming, wet paper pressing, dewatering and conveying.

According to the position on the paper machine, it can be divided into wet felt, upper felt and dry felt.

The wet blanket runs with water on the paper machine, and its function is to press the paper blank to make it dehydrated and smooth the surface of the paper.

The wet blanket has good water filtration and elasticity, high strength, small shrinkage rate, wear-resistant, anti-bacteria and acid-base corrosion resistance.

The upper part of the blanket is on the top of the wet blanket, and a small part is in contact with the drying cylinder, which plays the role of paper collar, top leveling and drying. It has the properties of flatness, stiffness, good elasticity, wear resistance and high temperature resistance.

The dry blanket covers the drying cylinder and operates in a wet and dry state, ironing and drying the paper, and has the properties of firmness, good elasticity, wear resistance and high temperature resistance.

Dry blankets can also be replaced by canvas or breathable fabrics woven from polyester filaments.

Papermaking blankets are divided into two types: woven and knitted. Woven papermaking blankets are made of wool and nylon staple fiber blended yarns with a blending ratio of about 75:25.

The manufacturing method of needle-punched papermaking felt is to first comb 50% wool and 50% nylon staple fiber or 100% nylon staple fiber into a fiber web, overlap multiple layers, and then use a barbed steel needle to stab the fiber web to the pre-woven fabric. On the annular base cloth, it can achieve a certain degree of tightness and flatness.

Acupuncture methods include single-sided acupuncture and double-sided acupuncture. The acupuncture blanket has the characteristics of good water drainage, wear resistance, high strength and long service life.

Fabric felt for paper forming and conveying in the paper industry.

Good dehydration, smoothness, dirt resistance, abrasion resistance, dimensional stability, chemical resistance, antibacterial, heat resistance and hydrolysis resistance are required.

The processing method is to first make a thick and thin base cloth with synthetic fibers, and then spread a mixed fiber net of synthetic fibers and a small amount of wool, which is made by needle punching, chemical treatment, resin finishing and heat setting.

For paper forming, wet paper pressing, dewatering and conveying.

According to the position on the paper machine, it can be divided into wet felt, upper felt and dry felt.

The wet blanket runs with water on the paper machine, and its function is to press the paper blank to make it dehydrated and smooth the surface of the paper.

The wet blanket has good water filtration and elasticity, high strength, small shrinkage rate, wear-resistant, anti-bacteria and acid-base corrosion resistance.

The upper part of the blanket is on the top of the wet blanket, and a small part is in contact with the drying cylinder, which plays the role of paper collar, top leveling and drying. It has the properties of flatness, stiffness, good elasticity, wear resistance and high temperature resistance.

The dry blanket covers the drying cylinder and operates in a wet and dry state, ironing and drying the paper, and has the properties of firmness, good elasticity, wear resistance and high temperature resistance.

Dry blankets can also be replaced by canvas or breathable fabrics woven from polyester filaments.

Papermaking blankets are divided into two types: woven and knitted. Woven papermaking blankets are made of wool and nylon staple fiber blended yarns with a blending ratio of about 75:25.

The manufacturing method of needle-punched papermaking felt is to first comb 50% wool and 50% nylon staple fiber or 100% nylon staple fiber into a fiber web, overlap multiple layers, and then use a barbed steel needle to stab the fiber web to the pre-woven fabric. On the annular base cloth, it can achieve a certain degree of tightness and flatness.

Acupuncture methods include single-sided acupuncture and double-sided acupuncture. The acupuncture blanket has the characteristics of good water drainage, wear resistance, high strength and long service life.

The fault in the operation of the blanket

Felt, forming wire and dry felt are the three most valuable items in paper production.

The quality of the felt has a great impact on the broken ends of the paper machine, the downtime and the unit cost of the finished product.

Therefore, in actual production, the blanket should be used as well as possible. In addition to reasonable selection, normal washing, and careful inspection before putting on the machine, it should also reduce the failures that are more likely to occur in use.

The deviation of the blanket

There are many reasons for the deviation of the blanket, which are generally caused by the following reasons: 1) The regulator that is automatically calibrated by the instrument fails; 2) The touch palm touches the guide roller or a false signal occurs on the frame, causing the corrector to malfunction; 3 ) One side of the felt is loose and the other is tight, and the standard line is seriously skewed, which is generally caused by the unilateral loosening of the tension roller; 4) A certain guide roller in the felt circle is skewed; 5) One end of a certain guide roller is wrapped around The pulp or felt edge is damaged and wrapped around the rolls more, causing inconsistent linear speed; 6) The two press rolls in the nip are not equal in contact at both ends, etc.

In actual production, attention should be paid to aligning the guide rollers and press rollers so that they are parallel to each other, paying attention to the unilateral adjustment of the felt tensioning roller, and checking the felt corrector frequently.

Blanket pleating: Except for the unevenness of the blanket, the pleating in the middle and the excessive deviation of the blanket, which are pleated on the edge of the blanket or the whole blanket.

There are several possible situations as follows: 1) Blanket folds. If the edge width of the blanket deviates slightly, it is easy to touch the bearing of the blanket roller and become pleated. Just tear off a portion of the blanket and adjust the corrector to center the blanket. 2) If the felt is pleated in the middle, the standard line may be too skewed due to operation and other reasons; the guide roller is entangled with pulp or there are too many sundries, and the wet paper will easily cause the felt to be pleated in the middle. 3) The pleating in the center of the blanket may be caused by the reverse installation of the blanket roll; a certain roller does not rotate due to a fault, which may also easily cause the blanket to be pleated in the middle.

Generally, if the felt is found to be pleated, it should be stopped immediately for inspection, and the press roll should be lifted at the same time. After loosening the felt, artificially flatten the felt, find out the cause, and deal with it. For paper machine felts with higher linear pressure, it is extremely difficult to flatten and use once pleated, and most of them are crushed. Therefore, special attention should be paid to inspection and maintenance during use.

Blanket pressure loss: In addition to the edge drop, running edge, and pleating of the thread threading felt mentioned above, the pressure loss of the felt may also have the following reasons: too much sticky pulp in the loop of the felt, and the loop is dropped due to maintenance or the frame. The lower parts enter the nip; pulp balls or felt wool balls on the frame fall into the felt ring, hard impurities brought by the wire part; the pressure of the press roll is very uneven; or caused by welding and other reasons. Be careful of damage to the blanket caused.

Generally speaking, if there is a big hole in the blanket, you should consider replacing it.

If the hole in the blanket is small and the quality of the blanket itself is still good, the method of sewing and repairing can be used for temporary treatment to maintain production.

The speed of the screw conveyor is mainly related to the transportation volume, and the two are directly related. However, it must be noted that the speed is too small or too large. If the speed is too small, the transportation volume will be reduced, but when the speed is too high and the limit is exceeded, the material will be thrown out due to centrifugal action and cannot be transported. . Therefore, its size should be suitable and cannot exceed the prescribed threshold.

1. At the beginning of the feeding, the feeding should be gradually increased, and the feeding should be evenly. Don't add to the rated amount of the equipment at once, otherwise it will cause blockage.

2. There should be no solid bulk material in the material, otherwise it will jam the screw and cause damage to the screw conveyor.

3. Don't feed the material when it is initiated, wait until it is initiated, and then start the conveyor without load.

4. Intermittent feeding should be done before stopping, and the operation of the equipment should be interrupted after the material in the machine has been transported.

5. Check the parts of the equipment regularly and frequently, such as whether the fasteners are loose. If there is any looseness, fasten them in time and take precautions in advance.

6. Do not remove the cover of the conveyor during operation to prevent personal hazards, and it is also necessary to frequently add lubricating oil to the moving parts.

The auger conveyor is suitable for horizontal transportation, inclined transportation, and vertical transportation of granular or powdery materials. The transportation distance varies depending on the deformation, generally from 2 meters to 70 meters. The rotating screw blade pushes the material and carries it on the screw conveyor.

Structure:

Spiral blades are welded on the rotating shaft of the screw conveyor. The double screw conveyor is a screw conveyor with two rotating shafts welded with rotating blades. To put it bluntly, it is to organically combine two screw conveyors to form a screw conveyor.

The rotation direction of the rotating shaft of the screw conveyor determines the direction of material transportation, but in general, when planning the screw conveyor, the rotating blades are planned according to the single transportation. When it is transported in the reverse direction, the life span of the conventional conveyor will be greatly reduced.