What is the reason for the increase in the negative pressure of the system and the large pressure di

If the bag is blocked, check whether the ash cleaning system or the bag is pasted.

Analysis of the causes of large negative pressure of dust collector: main causes and elimination methods:

1) Wrong differential pressure reading: Clean the pressure measurement interface, check whether there is a crack in the trachea, and check the differential pressure gauge.

2) Incorrect injection setting: Increase the frequency of injection compressed air.

The pressure is too low; Increase the pressure Check the dryer and clean it up (if needed) Check for blockages in the line.

3) Failure of the injection valve: check the diaphragm valve and check the control solenoid valve.

4) Pulse controller failure: check whether the controller indicates each contact Check each terminal.

output. 5) Filter bag blockage: condensation on the filter bag (see below); The filter bag is sent to the laboratory for analysis of the cause.

Filter bag drying and cleaning treatment or replacement Reduce air volume Increase compressed air pressure Increase cleaning frequency Spray in neutral modulating powder to form a protective layer and porous and loose primary cake.

6) Excessive secondary dust: continuous emptying of the ash hopper and the cleaning of each row of filter bags and filter cartridges are cleaned in a random sequence, rather than in sequence. Check the inlet baffle to make sure it's clean.

If the negative pressure at the inlet and outlet of the dust collector increases at the same time, it may be due to the following reasons:

Filter bag blockage: The filter bag of the dust collector is not cleaned thoroughly or the filter bag is aged, resulting in excessive dust accumulation on the surface of the filter bag, which hinders and quietly blocks the airflow channel, thereby increasing the negative pressure leakage of the inlet and outlet.

Changes in air volume: A sharp increase in air volume at the inlet and outlet of the collector can also lead to increased negative pressure. This may be due to a sudden increase in production due to production processes, raw materials**, etc.

Design defects: The unreasonable design of the dust collector will also lead to the increase of negative pressure at the inlet and outlet at the same time. For example, the design of the gas supply pipeline is not reasonable, so that the air flow is subject to unnecessary resistance, and the inlet and outlet ends are not centered.

Control system failure: The failure of the automatic control system of the dust collector causes the acceleration fan or pulse back-blowing system to work abnormally, and the negative pressure at the inlet and outlet increases at the same time.

To sum up, in order to solve the problem of increasing the negative pressure at the inlet and outlet of the dust collector at the same time, it is necessary to further overhaul and diagnose, find out the specific cause, and then deal with it in a targeted manner. In daily production and maintenance, attention should also be paid to the regular cleaning and maintenance of the dust collector to ensure the normal operation of the equipment and avoid a series of problems such as the simultaneous increase of the negative rent and slag pressure at the import and export.

1.The cloth bag is clogged.

2.Ash cleaning system failure.

3.The wind speed is too high.