Reverse blowing pressure stabilizing system of dust remover

Abstract

The utility model belongs to the technical field of electrolytic aluminum production, and particularly relates to a blowback pressure stabilizing system of a dust remover, which comprises the dust remover, a blowing pipe and a pulse valve are correspondingly arranged above a cloth bag in the dust remover, the blowing pipe is connected with an air storage tank through a compressed air pipeline, an intelligent pressure switch is arranged on the compressed air pipeline, and the pulse valve is connected with the air storage tank. A pneumatic butterfly valve is arranged on an air supplementing pipe of the air storage tank and electrically connected with the intelligent pressure switch. According to the utility model, the pressure of the air storage tank of the dust remover can be accurately controlled. When the pressure of the compressed air in the air storage tank of the dust remover is lower than the set value of the intelligent pressure switch, the pneumatic butterfly valve is automatically opened to supplement the compressed air to the air storage tank; when the pressure of the air storage tank of the dust remover reaches the upper limit value set by the intelligent pressure switch, the intelligent pressure switch controls the pneumatic butterfly valve to be closed, and air supply to the air storage tank is stopped. The pressure of the air storage tank of the dust remover is always kept floating in a specified interval, and the purpose of accurately controlling the pressure of compressed air is achieved.

Description

Technical Field

[0001] This utility model relates to a dust collector backflushing and voltage stabilizing system, belonging to the field of electrolytic aluminum production technology. Background Technology

[0002] The dust collector in the flue gas purification system of an electrolytic aluminum production enterprise consists of a dust chamber 4 and a clean gas chamber 11. In the dust chamber 4, the flue gas mixes and contacts with the absorbent (alumina powder) to react and absorb harmful gases such as fluorine in the electrolytic flue gas. The dust chamber 4 and the clean gas chamber 11 are separated by filter bags. The alumina powder that absorbs the fluorine-containing flue gas is finally adsorbed onto the filter bags under negative pressure. The alumina powder adsorbed on the filter bags needs to be back-blown to remove the dust at regular intervals. However, the compressed air pressure used for back-blowing needs to be controlled within a certain range. If the compressed air pressure is too high, it will cause damage to the filter bags; if the pressure is too low, the filter bags will not be thoroughly cleaned. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a dust collector backflushing and stabilizing system to solve the above problems.

[0004] The dust collector backflushing pressure stabilizing system of this utility model includes a dust collector, with a blow pipe and a pulse valve correspondingly installed above the filter bags inside the dust collector. The blow pipe is connected to an air storage tank through a compressed air pipeline. An intelligent pressure switch is installed on the compressed air pipeline, and a pneumatic butterfly valve is installed on the air supply pipe of the air storage tank. The pneumatic butterfly valve is electrically connected to the intelligent pressure switch.

[0005] The compressed air pipeline is also equipped with a pressure sensor, which is electrically connected to an audible and visual alarm. When the air pressure is not replenished in time and the pressure in the compressed air pipeline falls below the set value of the pressure sensor, an alarm signal is issued to alert the workers.

[0006] The gas tank of this invention is also equipped with a manual butterfly valve on its gas supply pipe.

[0007] The gas storage tank described in this utility model is equipped with a safety valve.

[0008] The working principle and process of this invention:

[0009] During operation of the purification system, the material adsorbed on the filter bags is blown off by compressed air backflushing the bags using pulse valves. When the dust collector's pulse valves backflush the filter bags, the compressed air in the storage tank is consumed. At this time, the intelligent pressure switch installed at the outlet of the storage tank detects the pressure drop. When the pressure in the storage tank drops to the set value of the intelligent pressure switch, the switch outputs a signal to open the pneumatic butterfly valve at the storage tank inlet, replenishing the storage tank with compressed air. When the compressed air pressure in the storage tank reaches the upper limit set by the intelligent pressure switch, the output signal stops, the pneumatic butterfly valve at the storage tank inlet closes, and the storage tank stops receiving air. The system then waits for the next backflushing cycle, and this process repeats.

[0010] The advantages of this utility model compared with the prior art are:

[0011] The dust collector backflushing pressure stabilizing system described in this invention enables precise control of the dust collector's air tank pressure. When the compressed air pressure in the air tank falls below the lower limit of the intelligent pressure switch's set value, the pneumatic butterfly valve automatically opens to replenish the air tank with compressed air. When the air tank pressure reaches the upper limit set by the intelligent pressure switch, the intelligent pressure switch controls the pneumatic butterfly valve to close, stopping the air supply to the air tank. This ensures that the air tank pressure remains within a specified range, achieving precise control of the compressed air pressure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram illustrating the principle of this utility model.

[0013] In the diagram: 1. Pulse jet pipe; 2. Pulse valve; 3. Filter bag; 4. Dust chamber; 5. Compressed air pipeline; 6. Intelligent pressure switch; 7. Safety valve; 8. Pneumatic butterfly valve; 9. Air tank; 10. Manual butterfly valve; 11. Clean air chamber; 12. Air supply pipe; 13. Air pressure sensor. Detailed Implementation

[0014] The present invention will be further described below with reference to specific embodiments.

[0015] However, the description of this utility model is only a structural or even functional description of the embodiments, and the scope of the present utility model is not limited by the embodiments described herein.

[0016] For example, multiple embodiments may have various modifications and forms, and it should be understood that the scope of this utility model includes equivalents that can realize the technical concept.

[0017] like Figure 1As shown, this embodiment is achieved through the following technical solution: including a dust collector, with a blow pipe 1 and a pulse valve 2 correspondingly provided above the filter bag 3 inside the dust collector. The blow pipe 1 is connected to the air storage tank 9 through a compressed air pipeline 5. An intelligent pressure switch 6 is provided on the compressed air pipeline 5. A pneumatic butterfly valve 8 is provided on the air supply pipe 12 of the air storage tank 9. The pneumatic butterfly valve 8 is electrically connected to the intelligent pressure switch 6.

[0018] The compressed air pipeline 5 is also equipped with a pressure sensor 13, which is electrically connected to an audible and visual alarm. When the air pressure is not replenished in time and the pressure in the compressed air pipeline 5 is lower than the set value of the pressure sensor, an alarm signal is issued to remind the workers.

[0019] The gas tank 9 is equipped with a manual butterfly valve 10 on the gas supply pipe 12, and the gas tank 9 is equipped with a safety valve 7.

[0020] The pneumatic butterfly valve 8 controls the air intake of the dust collector's air tank to precisely control the pressure of compressed air during backflushing of the dust collector's purification system.

[0021] The intelligent pressure switch 6 monitors the pressure of the dust collector's air tank in the purification system. When the pressure is lower than the set value of the intelligent pressure switch, it sends a signal to open the pneumatic butterfly valve to replenish the air tank with compressed air. When the pressure of the dust collector's air tank reaches the upper limit set by the intelligent pressure switch, it stops outputting the signal and controls the pneumatic butterfly valve to close, stopping the supply of air to the dust collector's air tank.

[0022] Specifically, at the air inlet of the dust collector's air tank 9 in the purification system, the manual turbine regulating valve on the main air intake pipeline is replaced with a pneumatic butterfly valve 8. Simultaneously, a smart pressure switch 6 is installed at the outlet of the air tank 9, with upper and lower limits set for it. When the dust collector's pulse valve 2 backflushes, the pressure in the air tank 9 decreases. When the compressed air pressure drops to the lower limit set by the smart pressure switch 6, the switch outputs a signal to control the pneumatic butterfly valve 8 to open, replenishing compressed air to the air tank 9. As compressed air is replenished, the pressure inside the air tank 9 rises. When the pressure reaches the upper limit set by the smart pressure switch 6, it stops outputting a signal, controlling the pneumatic butterfly valve 8 to close, stopping the replenishment of compressed air to the tank. The smart pressure switch 6 repeats this cycle, maintaining the pressure inside the air tank 9 within the set range.

[0023] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A dust collector backflushing pressure stabilizing system, comprising a dust collector, wherein a blowpipe (1) and a pulse valve (2) are correspondingly provided above the filter bag (3) inside the dust collector, and the blowpipe (1) is connected to an air storage tank (9) through a compressed air pipeline (5), characterized in that, The compressed air pipeline (5) is equipped with an intelligent pressure switch (6), and the air supply pipe (12) of the air storage tank (9) is equipped with a pneumatic butterfly valve (8), which is electrically connected to the intelligent pressure switch (6).

2. The dust collector backflushing pressure stabilizing system according to claim 1, characterized in that, The compressed air pipeline (5) is also equipped with a pressure sensor (13), which is electrically connected to an audible and visual alarm.

3. The dust collector backflushing pressure stabilizing system according to claim 1, characterized in that, The gas tank (9) is also equipped with a manual butterfly valve (10) on the gas supply pipe (12).

4. The dust collector backflushing pressure stabilizing system according to claim 1, characterized in that, The gas storage tank (9) is equipped with a safety valve (7).

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