Analysis of several common causes of filter bag breakage

The reasons for the damage of the bag are generally as follows:

1. Burning: If the dust bag is in the flue gas for a long time when the normal use temperature of the bag is exceeded, it is easy to harden and shrink the dust bag, or melt and produce holes. The thickness of the initial layer of the bag is not enough, and the sparks brought in by the smoke enter the bag, or the dust heats up, which will also cause the dust bag to burn out holes.

The burning of the dust bag is mainly reflected in the replacement of the dust bag. Due to the fact that the ash is not pre-coated after replacement, the high-temperature flue gas carries the spark directly into the cloth bag, which is easy to cause the dust bag to be burned. Measures to prevent burning:

Make sure the initial layer thickness of the surface of the dust bag.

2. Wear: Wear dust removal bags mainly occur in the middle of the dust collector, and on a single dust removal bag, they mainly occur within 1 meter of the bag from the outlet. Its main reason is that the flue gas distribution is uneven, the flow rate in the middle of the single chamber is too high, and the filtration gas velocity at the outlet on the single dust removal bag is too high, resulting in dust impact, wear and tear cloth bag, also make the fabric fiber tension of dust removal cloth bag damaged, easy to perforate local cloth bag, and the service cycle is too short.

Dust bags for frequently worn areas are replaced with abrasion-resistant bags.

3. Too high filtration gas velocity will break the initial dust layer, and the dust will impact the bag and cause excessive wear, if the number of cleaning bags is too high at this time, it is easy to cause the fabric of the bag to loosen, and accelerate the wear of the bag. Dust content in the flue gas exceeds the design standard, which will also accelerate the wear of the bag. The small ash hopper accumulates too much ash, which causes excessive dust content in the flue gas chamber and accelerates the wear of the cloth bag.

4. The distance between the dust bags is too small, and the keel is bent, which is easy to cause wear and tear between the bags. The difference between the diameter of the bag and the keel, too small cleaning effect is not good, will cause to shorten the cleaning cycle and increase the pressure of the air jet, when the bag and the keel friction will accelerate wear. Special attention should be paid to the characteristics of some filter cloths that vary greatly with temperature and have elongation characteristics.

5. When there are holes or burrs at the keel welding, or the rough surface caused by corrosion, it will also accelerate the wear of the bag. If the bag and the perforated plate are not tightly sealed, it will cause wear and tear at the reverse fold at the top of the bag.

6. The venturi tube or pulse tube is not properly aligned with the cloth bag, which is easy to cause the air flow from the blowing pipe to directly wash the upper part of the cloth bag and cause wear. If the bag is cleaned too often, it will accelerate the wear and tear of the bag.

1. Excessive stress.

1. Pressure range.

The maximum pressure of hot melt welding is 10 kg, and the bottom of the triangle is more pressure-resistant than the arc, and the maximum pressure of the seam is about 16 kg.

2. Differential pressure control.

The pressure difference of the filter bag is controlled between, the pressure difference should be implemented in accordance with the regulations, and there are two ways to measure the pressure difference, one is a relatively cheap mechanical pressure gauge, and the liquid may block the pressure gauge inlet, resulting in inaccurate pressure difference; the other is the more expensive diaphragm pressure gauge, which avoids the shortcomings of mechanical pressure gauges;

3. Flow control.

You can use a flow meter to change the bag by filtering how much flow rate you want to filter to effectively control the problem of excessive pressure.

Second, the quality of the filter bag itself.

1. The seam is not good.

If the jumper or off-line is easy to burst the bag, the pressure loss of the filter bag will increase during operation, and the impurities will scale, which will test the material and workmanship of the filter bag.

2. Hot melt is not good.

The filter bag is not welded through or over-welded.

3. The material is wrong.

The wrong choice of material will cause the use of filter bags.

3. Filter quality and design.

1. The filter bag is not fixed when put into the filter, but moves with the rotation of the liquid.

2. The degree of polishing of the filter basket also determines the use of the filter bag.

3. If the filter design is defective, there will be a burst bag in the filter bag, such as the filter basket is too long, and there is no support in the reuse of the filter bag.

Fourth, the filter bag is used.

1. The filter bag is not installed correctly when it is installed, and the ring of the filter bag is not installed in place.

When the filter bag is installed, the filter bag folds and when filtration begins, a water hammer effect is generated.

2. If the operator uses it improperly, pull off the welding between the filter bag ring and the filter cloth.

Causes of filter cloth breakage:

1. The quality of the filter cloth is the main reason for rupture. Filter cloth is woven from fibers, which often has the effect of fiber cloth quality. Filter cloth woven from short fibers is more easily broken than filter cloth woven from long fibers.

Therefore, in order to reduce losses, the choice of fabric quality must be selected according to the type of filtration process.

2. The filter cloth is in the middle of the filter plate, by applying strong pressure, the overall filter plate and filter cloth are fixed in the belt filter press, when the filter plate is carefully worn or deformed, this will lead to uneven stress of the filter cloth, in the place under strong pressure, there is loosening, these places can easily move the filter cloth, and the phenomenon of tearing the filter cloth occurs.

3. The filtrate contains a large amount of solids, and when the solid and belt filter press stops in the filter cloth, the buffer solid particles are a sharp shape, which is also easy to cause damage to the filter cloth.

After the concentrated sludge is fully mixed with a certain concentration of flocculant in the static and dynamic mixer, the tiny solid particles in the sludge coalesce into a flocculent mass with a large volume, and the free water is separated at the same time, and the flocculated sludge is transported to the filter belt of concentrated gravity dewatering, and the free water is separated under the action of gravity to form a sludge in a non-flowing state, and then clamped between the upper and lower mesh belts and dust pure, through the wedge-shaped pre-pressure area, the low pressure area and the high-pressure area from small to large Wang Gejing extrusion force and shear force. The sludge is gradually squeezed to achieve the separation of sludge and water, and then the filter cake is formed.

Broken and cracked filter cloth of the filter press is a common problem encountered in the production process of the belt filter press. Most users encounter damage to the press cloth of the belt filter, and the solution is to replace it, which not only affects the production efficiency, but also causes economic losses. Only check the cause of the filter cloth breakage to prevent damage, which is the main problem.

1.Improper installation of the filter cloth:

a. During the installation process, the storage and cloth bag cage are irregular, resulting in the deformation of the cloth or bag cage through extrusion;

b, the cloth and the filter cloth will not lead to the vertical cloth between the cloth and the panel, resulting in damage to the filter cloth between the long Qing Zhi period friction;

c. The injection tube is skewed, the blowing or injection pressure is too high, and the frequency is too high, which is easy to produce damage to the ring bag, packaging bag, and even the head and body separation bag

Whether it's in the use of filtered 2113 bags or in those.

Filter cotton. Whether it is used or not, it will be damaged. Well, you know, caused.

Filter bags. What are the main factors of damage?

In the actual use of the filter bag, if there is a problem with the temperature of the 5261, it is easy to be damaged. For example, in the actual operation process, if the temperature is too high and the situation is more serious, it is easy to cause instantaneous damage to the reed filter bag. Therefore, in the actual operation process, we must choose the appropriate temperature for 4102 to operate.

In the actual use of the filter bag, if there is a problem with the quality, we are also prone to 1653 damage in the actual operation process. Therefore, in the actual purchase process, we must pay more attention to the quality of the filter bag.

In the actual use of the filter bag, if the filter wind speed is faulty, it is easy to damage the filter bag. In today's many manufacturers, in order to be able to improve the wind speed well, they ignore many other problems. Although it has no effect in a short period of time, as soon as the time is long, the reaction will come out.

Therefore, in the actual purchase process, we must pay more attention to this aspect.

The above tips hope to help you, goodbye!

The filter bag is the core of the operation of the dust collector, and after a long time of use, the filter bag will inevitably be damaged, which will affect the operation status and service life of the dust collector.

1. Check the dust situation on the flower board, and there will be obvious dust accumulation around the mouth of the damaged filter bag (the dust should be cleaned up in time to prevent it from entering other filter bags, and at the same time, the mouth of the filter bag should be temporarily sealed with a cover plate or the filter bag should be replaced in time).

2. Use the tracer containing phosphor and the monochrome lamp to find: the method is to stop the ash cleaning of the chamber to be leaked, and then feed the tracer to the dusty air flow through the ash discharge port of the ash hopper. Isolate the chamber within 30 seconds of the tracer feeding, then go to the top of the pattern plate and slowly move the monochrome light on top of each filter bag.

If there is a hole in the filter bag, the tracer will leak out.

3. If there are multiple filter bags in the sub-chamber that are damaged, the pressure difference of the flower plate in the chamber will be obviously abnormal, and the smoke exhaust of the chimney will also be abnormal - when the sub-chamber is off-line cleaning, the dust collector will be better and the chimney will be normal; When the ash is cleaned in this sub-chamber, the dust collector is cleaned poorly, and the smoke exhaust of the chimney is abnormal.

Analysis of the reasons why the filter bag is easy to be damaged.

1. Filter wind speed.

The filtration air speed of the bag filter is too high, which is the main reason for the damage of the dust bag. In recent years, some units blindly reduce equipment costs, increase profits, in the design of the bag filter, the filtration wind speed is increased, there is no obvious response from users in a short time, but the service life of the filter bag is greatly shortened. Instead of saving money, this brings a huge financial burden to the customer and wastes time.

Second, the use temperature.

The correct selection of the dust bag suitable for the corresponding dust temperature is the key to the filter bag. If the temperature is too high, the selected dust removal filter bag will exceed the normal use temperature, and the filter bag will shorten the service life at the least, and the serious one will burn out in a short time. Therefore, when selecting filter bags, it is necessary to measure and calculate the inlet temperature of the dust collector, and select the corresponding dust removal bags.

Third, product quality.

The processing of cloth bags is particularly important. In recent years, some small manufacturers have used small sewing machines as processing equipment, and used inferior threads as raw materials for processing, and the processing level is far behind. The dust bag will be used for a short time to open the line, tear, fall off the bottom and other phenomena.

Although the size of the bag is slightly smaller, it can also be used, but after adsorbing the dust with a large specific gravity, the bag will fall off after being used for a period of time.

Whether it is in the use of filter bags or in the use of filter cotton, if you do not pay attention to maintenance problems in the process of use, there will be great trouble. Below, I will briefly introduce the main causes of filter bag damage.

1. Product quality problems. In the selection of filter bags, we must be careful. If you don't pay attention, in the actual use process, it won't take long for the line to open and crack.

These have a big impact on our actual adaptation.

2. Use the problem of temperature difference. In the process of using the filter bag, we must carefully debug the temperature difference. If in the actual use process, if the temperature is too high, when the filter bag is running under abnormal temperature conditions, the situation is relatively light, it will affect the use of the filter bag, otherwise, in the actual use process, there will be a destruction situation.

3. In the actual use process, if there is a problem because of the filtration wind speed, it will also have a great impact on the use of the filter bag. For example, in the actual use process, the increase of the filter wind speed will have a great impact on the service life of the filter bag.

There are many reasons for the damage of the filter bag, but in the actual use process, it is better to pay more attention.

Jucheng filter bag is honorably produced. . .