CN221950834U - Gas-solid separation filtration device - Google Patents

Abstract

The utility model relates to a filtering device, and in particular to a gas-solid separation filtering device. It comprises a filter, a back-blowing component, and a sensing component; the filter is provided with a through air inlet and an air outlet at least on the outer surface, a filter material is arranged inside the filter, an ash hopper is arranged at the bottom of the filter, and a discharge port is arranged at the bottom of the ash hopper; the back-blowing component comprises an air storage tank, a back-blowing air pipe, and a back-blowing valve; the air storage tank is connected to the back-blowing air pipe, and the pipe mouth of the back-blowing air pipe is aligned with the filter material; the sensing component is arranged inside the filtering component and inside the back-blowing component, and the sensing component can monitor temperature, pressure, and pressure difference. By setting the back-blowing program, the back-blowing air pipe at the top of the filter performs high-pressure back-blowing cleaning on the filter material in the device, completing the back-blowing action, and preventing the formation of condensed dust on the surface of the filter brick. The sensing component can monitor the internal state of the filter, realize pressure difference feedback through the set program, and automatically adjust the cycle back-blowing time.

Description

Gas-solid separation filtration device

Technical Field

The utility model relates to a filtering device, in particular to a gas-solid separation filtering device.

Background Art

Gas-solid two-phase flow state is widely present in industrial processes, involving the separation of solid particles in high-temperature and pressured gases. Its purpose is to meet the requirements of product quality upgrade, efficient energy utilization and pollution emission control. Material recovery and gas purification are the ultimate goals of applying gas-solid two-phase flow separation technology. Dry dust removal methods are usually used under high-temperature conditions. When it is necessary to filter the gas, the filter element in the device will filter the gas and leave a filter cake. The filter cake is the solid matter contained in the original liquid retained on the filter after the liquid passes through the filter. The formation of the filter cake helps to improve the dust removal efficiency, but it also increases the pressure loss. The effect of the filter cake on the pressure loss depends on the thickness of the filter cake and the dust specific resistance coefficient. The frequent changes in the filtering parameters in the device are likely to cause the filtration system to be blocked. The filter cake cannot be formed on the surface of the filter brick, but the dust condenses into blocks, which affects the filtration accuracy and filtration efficiency. In severe cases, it may even cause system damage, shutdown for cleaning or replacement of the filter brick, waste time, and increase operating costs.

Utility Model Content

Technical purpose: In order to overcome the deficiencies in the prior art, the utility model provides a gas-solid separation filtration device.

Technical solution: To achieve the above-mentioned purpose, the utility model discloses a gas-solid separation filtration device, including a filter, a backblowing assembly, and a sensing assembly; the filter is provided with a through air inlet and an air outlet on at least the outer surface, a filter material is arranged inside the filter, an ash hopper is arranged at the bottom of the filter, and a discharge port is arranged at the bottom of the ash hopper; the backblowing assembly includes an air storage tank and a backblowing air pipe; the air storage tank is connected to the backblowing air pipe, and the pipe mouth of the backblowing air pipe is aligned with the filter material; the sensing assembly is arranged inside the filter assembly and inside the backblowing assembly, and the sensing assembly can monitor and adjust the temperature and pressure.

Furthermore, it also includes a control cabinet, in which electrical components such as a programmable control system, a touch screen, and a safety barrier are arranged; the touch screen can display the parameters of the sensing component and set the control parameters and alarm protection parameters; the programmable control system is used to control the adjustment of the sensing component; the safety barrier is used to protect the control cabinet and the sensing component.

Furthermore, a fixed tube sheet is arranged in the filter; the fixed tube sheet is arranged between the air inlet and the air outlet, and one end of the filter material passes through the fixed tube sheet and is connected to the fixed tube sheet.

Furthermore, the sensing component includes a first pressure transmitter, a second pressure transmitter, a third pressure transmitter, and a first differential pressure transmitter; the first pressure transmitter and the first differential pressure transmitter are arranged on the filter; the first differential pressure transmitter is arranged on both sides of the fixed tube sheet; the second pressure transmitter is arranged on the gas storage tank; and the third pressure transmitter is arranged at the ash hopper.

Furthermore, the sensing component also includes a first temperature transmitter, a second temperature transmitter, a third temperature transmitter, and a fourth temperature transmitter; the first temperature transmitter is arranged in the filter; the second temperature transmitter is arranged in the gas storage tank; the third temperature transmitter and the fourth temperature transmitter are arranged in the ash hopper.

Furthermore, the back-blowing assembly also includes an instrument air assembly; the instrument air assembly includes an instrument air duct, a first pipeline, a second pipeline, and a back-blowing valve; the back-blowing air duct is connected to the back-blowing valve, the second pipeline is connected to the blowing valve, the first pipeline is connected to the second pipeline, and the first pipeline is connected to the instrument air duct.

The beneficial effects of the utility model are:

1. By setting the back-blowing program, the back-blowing air pipe at the top of the filter can clean the filter material in the device at high temperature, and the back-blowing action can be performed to prevent the formation of condensed dust on the surface of the filter brick.

2. The sensing component can monitor the internal pressure state of the filter, and change the cycle backflush time according to the pressure difference state through the set program to prevent the filtration dust from condensing into blocks due to insufficient wind force when the pressure is insufficient, or the filtration performance is reduced due to excessive wind force when the pressure is too high. The filter pressure difference can be controlled within a reasonable operating range. It saves manpower and material resources, reduces operating costs, improves filtration efficiency, and improves the reliability and stability of the system.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a cross-sectional view of a gas-solid separation filtration device;

FIG2 is a perspective schematic diagram of a gas-solid separation filtration device;

FIG3 is a schematic diagram of a control cabinet of a gas-solid separation filtration device;

FIG. 4 is a flow chart of a specific embodiment of the gas-solid separation filtration device.

In the figure, 1, filter; 101, air inlet; 102, air outlet; 103, filter material; 104, ash hopper; 105, discharge port; 2, backblowing assembly; 201, gas storage tank; 202, backblowing air pipe; 301, first pressure transmitter; 302, second pressure transmitter; 303, third pressure transmitter; 304, first differential pressure transmitter; 401, first temperature transmitter; 402, second temperature transmitter; 403, third temperature transmitter; 404, fourth temperature transmitter; 5, instrument air assembly; 501, instrument air duct; 502, first pipeline; 503, second pipeline; 504, backblowing valve; 6, control cabinet; 601, touch screen; 602, programmable control system; 603, safety barrier.

DETAILED DESCRIPTION

The principles and features of the present invention are described below in conjunction with Figures 1 to 4 . The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

A gas-solid separation filter device includes a filter 1, a backflush assembly 2, a sensing assembly, and a control cabinet 6. The filter 1 is provided with a through air inlet 101 and an air outlet 102 at least on the outer surface. A filter material 103 and a fixed tube sheet are provided in the filter 1. The fixed tube sheet is provided between the air inlet 101 and the air outlet 102. One end of the filter material 103 passes through the fixed tube sheet and is connected to the fixed tube sheet. An ash hopper 104 is provided at the bottom of the filter 1. A discharge port 105 is provided at the bottom of the ash hopper 104. The process gas enters the filter 1 from the air inlet 101, and is filtered by the filter material 103. The particles in the gas are blocked by the filter material 103 and gradually form a filter cake. The purified gas passes upward through the fixed tube sheet and enters the air outlet 102.

The back-blowing assembly 2 includes an air storage tank 201, a back-blowing air pipe 202, and an instrument air assembly 5. The air storage tank 201 is connected to the back-blowing air pipe 202, and the pipe mouth of the back-blowing air pipe 202 is aligned with the filter material 103. The instrument air assembly 5 includes an instrument air pipe 501, a first pipeline 502, a second pipeline 503, and a back-blowing valve 504. The back-blowing air pipe 202 is connected to the back-blowing valve 504, the second pipeline 503 is connected to the back-blowing valve 504, the first pipeline 502 is connected to the second pipeline 503, and the first pipeline 502 is connected to the instrument air pipe 501. The air storage tank 201 stores high-pressure back-blowing gas, and the high-pressure back-blowing gas is blown from the air blowing pipe 202 to the filter material 103, and the filter material 103 blows the agglomerated particles away and falls into the ash hopper 104 to prevent the formation of dust condensed into blocks on the surface of the filter brick. The instrument air assembly 5 is clean gas, which is blown from the instrument air pipe 501 to the first pipeline 502 through the second pipeline 503 to provide power for the back-blowing valve 504.

The sensing assembly includes a first pressure transmitter 301, a second pressure transmitter 302, a third pressure transmitter 303, a first differential pressure transmitter 304, a first temperature transmitter 401, a second temperature transmitter 402, a third temperature transmitter 403, and a fourth temperature transmitter 404. The first pressure transmitter 301 and the first differential pressure transmitter 304 are arranged on the filter 1, the first pressure transmitter 301 is arranged on the side close to the filter material 103, the first differential pressure transmitter 304 is arranged on both sides of the fixed tube sheet, the second pressure transmitter 302 is arranged in the gas storage tank 201, and the third pressure transmitter 303 is arranged in the ash hopper 104. The first temperature transmitter 401 is arranged in the filter 1, and the second temperature transmitter 402 is arranged in the gas storage tank 201. The third temperature transmitter 403 and the fourth temperature transmitter 404 are arranged in the ash hopper 104. The first pressure transmitter 301 is used to monitor the process gas pressure before filtration, the second pressure transmitter 302 is used to monitor the pressure in the gas storage tank 201, and the third pressure transmitter 303 is used to monitor the pressure in the ash hopper 104. The first differential pressure transmitter 304 is used to monitor the pressure difference before and after filtration inside and outside the fixed tube sheet. The first temperature transmitter 401 is used to monitor the temperature in the filter 1, the second temperature transmitter 402 is used to monitor the temperature in the gas storage tank 201, and the third temperature transmitter 403 and the fourth temperature transmitter 404 are used to monitor the temperature of the dust in the ash hopper 104.

The control cabinet 6 includes a programmable control system 602, a touch screen 601, and a safety barrier 603. The touch screen 601 can display the parameters measured by the sensing component and set the control parameters and alarm protection parameters. The programmable control system 602 is used to control the parameter adjustment of the sensing component. The safety barrier 603 has the functions of circuit explosion-proof and signal isolation, and is used to protect the control cabinet 6 and the sensing component.

The specific usage method of this embodiment is:

The control system divides the system into three parallel and independent modes for backflush cycle control according to the changes in the filtration pressure difference. The three control modes are automatically switched according to the changes in the filtration pressure difference without human intervention.

P1 and P2 are the filter pressure difference setting values, P1>P2;

T1, T2, and T3 are the pulse valve backwash intervals, T3>T2>T1;

T4 is the pulse valve opening time.

Specific steps:

1. Start the programmable control system 602, filter 1 and back-blowing assembly 2, detect the back-blowing gas temperature and pressure, filter 1 temperature and pressure and filter pressure difference. When the filter pressure difference does not reach the control point P2, calculate the interval back-blowing time T3 according to the dust content of the process gas and the performance of the filter material 103:

2. After a delay of T3, pulse valve 1# opens;

3. After the pulse valve 1# is opened and the delay time is T4, the pulse valve 1# is closed;

4. Repeat steps 2 and 3 until pulse valve n# is closed;

5. Repeat steps 1 and 4 until the filtration pressure difference reaches the control point P2.

6. When the filtration pressure difference reaches the control point P2, the programmable control system 602 performs line circulation backwashing according to the interval backwashing time T2:

7. After a delay of T2, pulse valve 1# opens;

8. After the pulse valve 1# is opened and the delay time is T4, the pulse valve 1# is closed;

9. Repeat steps 7 and 8 until pulse valve n# is closed;

10. Repeat steps 6 and 9. When the filtration pressure difference is less than the control point P2, execute steps 1 and 5 for cyclic backwash control.

11. When the filtration pressure difference reaches the control point P1, the programmable control system 602 performs line backwashing according to the interval backwashing time T1:

12. After a delay of T1, pulse valve 1# opens;

13. After the pulse valve 1# is opened and the delay time is T4, the pulse valve 1# is closed;

14. Repeat steps 11 and 12 until pulse valve n# is closed;

15. Repeat steps 11 and 14. When the filtration pressure difference is less than the control point P1 and greater than P2, perform the cyclic backwash control of steps 6 and 9.

This embodiment mainly controls the filter pressure difference. When the filter pressure difference does not reach the set value, the system performs system backwashing according to the designed maximum cycle backwashing time to prevent dust from condensing on the surface of the filter brick. When the filter pressure difference reaches the set value, the system automatically changes the cycle backwashing time according to the change of the filter pressure difference. When the filter pressure difference is lower than the set value, the system automatically returns to the designed maximum cycle backwashing time to perform system backwashing. This method can control the filter pressure difference within a reasonable operating range.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. A gas-solid separation filter device, characterized in that it comprises a filter (1), a back-blowing assembly (2), and a sensing assembly; the filter (1) is provided with a through air inlet (101) and an air outlet (102) on at least the outer surface; a filter material (103) is arranged inside the filter (1); a ash hopper (104) is arranged at the bottom of the filter (1); a discharge port (105) is arranged at the bottom of the ash hopper (104); the back-blowing assembly (2) comprises an air storage tank (201) and a back-blowing air pipe (202); the air storage tank (201) is connected to the back-blowing air pipe (202), and the pipe mouth of the back-blowing air pipe (202) is aligned with the filter material (103); the sensing assembly is arranged on the filter (1) and the back-blowing assembly (2), and the sensing assembly can monitor temperature, pressure and pressure difference. 2. The gas-solid separation filtration device according to claim 1 is characterized in that it also includes a control cabinet (6), in which a programmable control system (602), a touch screen (601), and a safety barrier (603) are arranged; the touch screen (601) can display the parameters of the sensing component and set the control parameters and the alarm protection parameters; the programmable control system (602) is used to receive the feedback signal of the sensing component and control the operation of the backflush system; the safety barrier (603) is used to protect the control cabinet (6) and the sensing component. 3. The gas-solid separation filtration device according to claim 2 is characterized in that a fixed tube sheet is arranged in the filter (1); the fixed tube sheet is arranged between the air inlet (101) and the air outlet (102), and one end of the filter material (103) passes through the fixed tube sheet and is connected to the fixed tube sheet. 4. The gas-solid separation filtration device according to claim 3 is characterized in that the sensing component includes a first pressure transmitter (301), a second pressure transmitter (302), a third pressure transmitter (303), and a first differential pressure transmitter (304); the first pressure transmitter (301) and the first differential pressure transmitter (304) are arranged on the filter (1), and the first pressure transmitter (301) is arranged on a side close to the filter material (103); the first differential pressure transmitter (304) is arranged on both sides of the fixed tube sheet; the second pressure transmitter (302) is arranged on the gas storage tank (201); and the third pressure transmitter (303) is arranged on the ash hopper (104). 5. The gas-solid separation filtration device according to claim 4 is characterized in that the sensing component also includes a first temperature transmitter (401), a second temperature transmitter (402), a third temperature transmitter (403), and a fourth temperature transmitter (404); the first temperature transmitter (401) is arranged in the filter (1); the second temperature transmitter (402) is arranged in the gas storage tank (201); the third temperature transmitter (403) and the fourth temperature transmitter (404) are arranged in the ash hopper (104). 6. The gas-solid separation filtering device according to claim 5 is characterized in that the back-blowing component (2) also includes an instrument air component (5); the instrument air component (5) includes an instrument air duct (501), a first pipeline (502), a second pipeline (503), and a back-blowing valve (504); the back-blowing air duct (202) is connected to the back-blowing valve (504), the second pipeline (503) is connected to the blowing valve, the first pipeline (502) is connected to the second pipeline (503), and the first pipeline (502) is connected to the instrument air duct (501).