How to solve the reduction of dust removal effect of electrostatic precipitator

From the description, electrostatic precipitators are often used in exhaust gas treatment equipment, and their principle is to use the principle of electrostatic action to capture dust equipment. It has the characteristics of wide application range, high dust removal effect, low equipment resistance and low energy consumption, and can handle large air volume flue gas. In the actual exhaust gas treatment process, the dust removal effect of the electrostatic precipitator will decrease, so that the exhaust gas discharged cannot meet the standard, so what is the reason?

How should it be solved?

1. Reasons for the reduction of dust removal effect:

1.The anode plate is spaced, the discharge field is small, the dust collection efficiency is low, the exhaust gas resistance is large, and the third electric field is cut off during operation.

2.When the electrostatic precipitator has not been running at full load during exhaust gas treatment, it will be open and stopped or operated at low voltage or only partially operated by the electric field, and the exhaust gas will go through the bypass or pass through the precipitator when it is out of operation. Long-term operation in this way will lead to serious cathodic and cathodic corrosion of the dust collector, which will reduce the discharge field of the equipment.

3.The use effect of the rapping device of the electrostatic precipitator is poor, and the vibrating anvil is damaged or dropped seriously. Moreover, due to the rapping problem, the corona wire is hypertrophied, the anode plate is thicker, and the cathode and anode deformation or pole spacing displacement changes, which makes it difficult for the working voltage to rise and reduces the dust removal effect.

Second, the solution to the poor dust removal effect of the electrostatic precipitator.

1.We should adjust the electric magnetic field to the range with good dust removal effect and maintain a stable electric magnetic field, which will make the equipment last longer.

2.The electric field anode ZT24 type should be rolled with a thicker cold-rolled steel plate, generally in the plate installation interlocking connection with each other, the plate is hung at a single point, the upper end is bolted to the plate suspension beam, and the lower end is bolted to the rapping rod. In addition, there are baffles in the ash hopper and the side wall and internal walking platform at the front end of each electric field, which can prevent dusty gases from bypassing the electric field and directly reaching the gas outlet.

Thank you!!!

Summary. First of all, we need to modify the body of the electrostatic precipitator - remove the high-voltage transformer in the electric field of the electrostatic precipitator, and clean it to keep the field hollow and clean. Then, on the basis of retaining the original inlet and outlet channels, a reliable airflow distribution device is installed at the junction point of the electric bag, which is connected to the opening of the original electrostatic precipitator housing.

As for the ash hopper and the insulation system, in principle, we don't need to modify it, just do some maintenance and update work. After the modification of the dust collector, we can call it "electric-bag dust collector", the electric-bag dust collector has a better level of gas inflow and outflow technology, which can effectively reduce the resistance loss.

First of all, we need to modify the body of the electrostatic precipitator - remove the high-voltage transformer in the electric field of the electrostatic precipitator, and clean it to keep the field hollow and clean. Then, on the basis of retaining the original inlet and outlet channels, a reliable airflow distribution device is installed at the joint point of the electric bag, which is connected to the opening of the original electrostatic precipitator housing. As for the ash hopper and the insulation system, in principle, we don't need to modify it, just do some maintenance and update work.

After the modification, we can call it an "electric-bag dust collector", and the electric-bag filter has a better level of gas inflow and outflow technology, which can effectively reduce the resistance loss.

The modified electric-bag filter has the following characteristics: average airflow velocity and more uniform concentration in different filter bags. This is due to the fact that it uses the original electrostatic precipitator to make the dust have a positive and negative charge respectively, and the dust with the same charge will spread evenly due to repulsion.

As for the dust with different charges, it will be adsorbed together due to the action of electrostatic gravity, forming larger particles and arranged in an orderly manner on the surface of the filter bag. In this way, the air permeability of the dust layer is greatly improved, so that the dust removal capacity of the dust collector is maintained at a high level for a long time. In addition, since the original 1 electric field of the electrostatic precipitator has not been removed, it can give full play to its role, that is, to maintain a large dust collection capacity.

Finally, due to the use of a more efficient bag dust collector in the rear, it can reduce the dust load and resistance, increase the amount of ash removal and extend the dust removal cycle. Pants sleepy.

Although the electrostatic precipitator has high dust removal efficiency, but the resistance is high, the energy consumption is high, the dust collector occurs immediately after the system is running, and the dust collector occurs after working for a period of time; If the design of the newly installed dust collector is improper, it is easy to cause the occurrence of the first phenomenon; The second reason is due to operational problems and maintenance: the main reason is poor cleaning of the filter bag, blockage of the filter bag, and uneven distribution of the inlet air. Check the quality of the compressed air, whether it contains oil and water; Check whether the gas supply pipeline is unblocked; Check whether the pulse solenoid valve is working normally, whether the fastening bolt is loose, whether the diaphragm is damaged, and whether the solenoid coil is loose; whether the spool is jammed; Whether the setting of the sequence controller meets the requirements and whether it has been changed; Whether the installation of the jet branch pipe and venturi pipe is accurate.

The main reasons for the blockage of the filter bag are that the filtration speed is too large, the dust is too fine, the dust is sticky, the filter bag is not cleaned, and the filter bag is damp. If the dust collector runs the filter gas speed of the morning Bibi beyond the design standard of the filter bag, it is very easy to cause the fine dust in the exhaust gas to get stuck inside the filter bag fiber. As a result, filter bag clogging occurs.

It is better to use a coated filter media or to pre-coat the surface of the filter bag with a protective powder layer. I hope Lu Ju can help you.

1. The wiring of the dust collector fan is wrong, the fan is reversed, and the wiring is rewired.

2. The bag in the dust collector is not firmly tied or has not been replaced for a long time and is damaged, and the dust flies out from the dew, which affects the dust removal effect, or the lack of cloth bags, if the number of bags is small and the air volume is small can not meet the cleaning requirements of the machine.

3. The dust collector chamber or dust removal pipeline is not sealed, and all parts should be sealed.

4. The cleaned parts are not sand as required, the workpiece sand residue is large, and the dust content of the dust removal inlet is too high.

5. If the dust collector and the array mechanism are not enabled or the number of times is small, the dust blocks the cloth bag, and the dust attached to the cloth bag should be cleaned up in time.

If the dust collector is a rapping type, you haven't cleaned the manual cleaning for a long time, and the cloth bag is full of dust, which will affect your dust collection effect.