Filter bag blowback device for natural gas vapor deposition

Abstract

The utility model relates to the technical field of natural gas vapor deposition, in particular to a filter bag blowback device for natural gas vapor deposition, which comprises a filter tank, a filter bag assembly and a blowback assembly, the filter bag assembly is arranged in an inner cavity of the filter tank, and the reverse blowing assembly is arranged at the top of the filter tank, extends into the inner cavity of the filter tank, is arranged opposite to the filter bag assembly and is used for blowing air to the filter bag assembly; an air inlet pipe and an exhaust pipe are arranged on the filtering tank; the air inlet pipe is fixedly mounted on the top wall of the filtering tank; the exhaust pipe is fixedly mounted at one end, close to the bottom, of the side wall of the filtering tank; the back flushing assembly blows air to the filter bag assembly, sediments accumulated on the filter bag assembly are blown to the bottom of the inner cavity of the filter tank, the surface of a filter bag is conveniently prevented from being blocked by a large number of sediments, and therefore the gas phase deposition efficiency of natural gas is improved; and the control unit avoids manual monitoring and adjustment, so that the working efficiency of the blowback device is improved.

Description

Technical Field

[0001] This application relates to the technical field of natural gas chemical vapor deposition, and particularly relates to a filter bag backwashing device for natural gas chemical vapor deposition. Background Art

[0002] When producing and processing carbon / carbon composites, it is necessary to place the carbon / carbon preform in a natural gas deposition furnace, introduce natural gas into the deposition furnace, and pyrolyze the natural gas under certain temperature conditions. During the pyrolysis process, the organic substances in the natural gas will decompose to form matrix carbon; this matrix carbon then fills the pores of the carbon / carbon preform, thereby preparing the carbon / carbon composite material.

[0003] During the production of carbon / carbon composites, after the natural gas is pyrolyzed, the residual gas is mixed with sediments and needs to be recycled. Before recycling, the gas mixed with sediments is first cooled by a cooling device. After cooling, the gas passes through a filtering device to filter the sediments in the gas, and then the gas is introduced into the next process after filtering.

[0004] During long-term use of the filtering device, a large amount of sediments will accumulate on the surface of the filter bag, and the problem of filter bag blockage is serious, resulting in an increase in the pressure inside the device, seriously affecting the normal operation of natural gas chemical vapor deposition. Frequent abnormal shutdowns not only reduce the product qualification rate but also lead to a significant increase in production costs. Utility Model Content

[0005] In order to improve the efficiency of natural gas chemical vapor deposition, this application provides a filter bag backwashing device for natural gas chemical vapor deposition.

[0006] The filter bag backwashing device for natural gas chemical vapor deposition provided by this application adopts the following technical solutions:

[0007] A filter bag backwashing device for natural gas chemical vapor deposition includes a filter tank, a filter bag assembly, and a backwashing assembly; the filter bag assembly is arranged in the inner cavity of the filter tank, the backwashing assembly is arranged at the top of the filter tank, and the backwashing assembly extends into the inner cavity of the filter tank and is arranged opposite to the filter bag assembly, and the backwashing assembly is used to blow air to the filter bag assembly;

[0008] An air inlet pipe and an exhaust pipe are arranged on the filter tank; the air inlet pipe is fixedly installed on the top wall of the filter tank, and the air inlet pipe is communicated with the inner cavity of the filter tank, and the air inlet pipe is located below the filter bag assembly;

[0009] The exhaust pipe is fixedly installed at one end near the bottom of the side wall of the filter tank, and the exhaust pipe is communicated with the inner cavity of the filter tank, and the exhaust pipe is located above the filter bag assembly.

[0010] By adopting the above technical solution, a backwashing device is provided. After pyrolysis, the residual gas of natural gas enters the filter tank through the intake pipe. The sediment mixed in the residual gas is filtered by the filter bag assembly, and the filtered gas enters the next process through the exhaust pipe. The filter bag assembly is blown by the backwashing assembly, and the accumulated sediment on the filter bag assembly is blown to the bottom of the inner cavity of the filter tank, which helps to prevent a large amount of sediment from accumulating on the surface area of the filter bag assembly during long-term use, blocking the filter bag assembly, and thus avoiding shutdown for cleaning, thereby improving the efficiency of natural gas vapor deposition.

[0011] In a specific feasible implementation, the filter bag assembly includes a filter bag orifice plate, a filter bag skeleton, and a filter bag. The filter bag orifice plate is fixedly connected to the inner wall of the filter tank in the horizontal direction. A plurality of mounting holes are evenly arranged on the filter bag orifice plate. A plurality of the filter bag skeletons are respectively inserted into the mounting holes. The filter bag skeleton fits against the inner wall of the filter bag, and the upper end of the filter bag skeleton is engaged with the filter bag orifice plate. The bag mouth of the filter bag is clamped between the filter bag orifice plate and the filter bag skeleton.

[0012] By adopting the above technical solution, the provided filter bag assembly clamps the bag mouth of the filter bag between the filter bag orifice plate and the filter bag skeleton, enhancing the stability of the filter bag installation. At the same time, the inner wall of the filter bag fits against the filter bag skeleton, which helps to prevent the filter bag from deforming, so that the residual gas entering through the intake pipe can be filtered by the filter bag on the outer wall of the filter bag, improving the filtering effect on the residual gas.

[0013] In a specific feasible implementation, the backwashing assembly includes an air pipe, a shunt pipe, a backwashing pipe, and a nozzle. One end of the air pipe is fixedly connected to a high-pressure gas source, and the other end extends into the inner cavity of the filter tank. The air pipe is located above the filter bag orifice plate. The end of the air pipe extending into the inner cavity of the filter tank is fixedly connected to the shunt pipe. The shunt pipe is horizontally placed above the filter bag orifice plate, and a plurality of support rods are arranged between the shunt pipe and the filter bag orifice plate. A plurality of the backwashing pipes are arranged on the shunt pipe. One end of the backwashing pipe is fixedly connected to the side wall of the shunt pipe, and the other end extends into the inner wall of the filter bag. The backwashing pipe is communicated with the inner cavity of the shunt pipe. The nozzle is fixedly arranged at the end of the backwashing pipe extending into the inner wall of the filter bag.

[0014] The backwashing pipe is set as a flexible pipe.

[0015] By adopting the above technical solution, the provided backwashing assembly allows the high-pressure gas source to input high-pressure gas into the air pipe. The high-pressure gas enters the shunt pipe through the air pipe. A plurality of backwashing pipes arranged on the shunt pipe extend into the inner wall of the filter bag, and the nozzle at the end of the shunt pipe jets air into the inner wall of the filter bag, causing the accumulated sediment to fall from the outer surface of the filter bag, preventing the filter bag from being blocked and affecting the normal progress of natural gas vapor deposition.

[0016] In a specific feasible embodiment, air jet holes are provided on the spray head, and the air jet holes communicate with the inner cavity of the backflush pipe;

[0017] The axial direction of the air jet holes is not parallel to the axial direction of the backflush pipe.

[0018] By adopting the above technical solution, the axial direction of the provided air jet holes has an inclined angle with the axial direction of the backflush pipe. When high-pressure gas is ejected through the air jet holes, the inclined air jet holes cause the spray head to receive a reaction force from the ejection, resulting in flapping on the inner wall of the filter bag. During the flapping process of the spray head, the spray head collides with the filter bag skeleton and the inner wall of the filter bag, further causing the deposits accumulated on the outer surface of the filter bag to fall off.

[0019] In a specific feasible embodiment, a plurality of backflush holes are provided on the side wall of a section of the backflush pipe extending into the inner wall of the filter bag.

[0020] By adopting the above technical solution, the backflush holes provided on the side wall of the backflush pipe simultaneously jet air circumferentially on the inner wall of the filter bag when the spray head jets air on the filter bag, which is convenient for improving the blowing effect on the deposits on the outer surface of the filter bag.

[0021] In a specific feasible embodiment, it further includes an electromagnetic valve, which is fixedly arranged on the side wall of a section of the air pipe extending out of the filter tank, and the electromagnetic valve communicates with the inner cavity of the air pipe.

[0022] By adopting the above technical solution, the electromagnetic valve provided on the side wall of the air pipe controls the flow rate of the high-pressure gas in the air pipe by changing the opening and closing degree of the electromagnetic valve, so as to adjust the jet pressure on the backflush pipe, which is convenient for improving the blowing efficiency of the deposits on the outer surface of the filter bag.

[0023] In a specific feasible embodiment, it further includes a pressure transmitter, which is fixedly arranged on the side wall of a section of the air pipe extending out of the filter tank, and the pressure transmitter is located between the electromagnetic valve and the filter tank.

[0024] By adopting the above technical solution, the provided pressure transmitter can monitor the pressure in the air pipe in real time. When the pressure difference in the air pipe exceeds the set value, the electromagnetic valve is opened, and the backflush assembly blows air on the filter bag; it is convenient to avoid damage to the equipment caused by excessive pressure in the filter tank due to blockage of the filter bag.

[0025] In a specific feasible embodiment, it further includes a thermocouple, which is fixedly arranged on the top of the filter tank, and the thermocouple is inserted into the inner cavity of the filter tank.

[0026] By adopting the above technical solution, the thermocouple detects the temperature of the residual gas inside the filter tank. When the temperature is too high, the supply of residual gas to the filter tank can be stopped, or the cooling device in the previous section can be adjusted to avoid damage to the filter bag caused by excessive temperature inside the filter tank, which is convenient for ensuring that the filter bag is used within the normal working temperature range, thereby facilitating the improvement of the service life of the filter bag.

[0027] In a specific feasible implementation, it further includes a control unit, and the control unit is electrically connected to the solenoid valve and the pressure transmitter.

[0028] By adopting the above technical solution, the set control unit receives a signal from the pressure transmitter when the detected pressure difference is too large, and the control unit controls the solenoid valve to open, enabling the backwashing assembly to blow air onto the inner wall of the filter bag, avoiding manual monitoring and adjustment, and facilitating the improvement of the working efficiency of the backwashing device.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. The set backwashing device blows air onto the filter bag assembly through the backwashing assembly, blowing the deposits accumulated on the filter bag assembly to the bottom of the inner cavity of the filter tank, which is convenient for avoiding a large amount of deposits accumulating on the surface of the filter bag assembly during long-term use, causing the filter bag assembly to be blocked, thereby avoiding shutdown for cleaning, and thus improving the efficiency of natural gas gas-phase deposition.

[0031] 2. The set control unit avoids manual monitoring and adjustment, and is convenient for improving the working efficiency of the backwashing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the overall structural schematic diagram of a filter bag backwashing device for natural gas gas-phase deposition in an embodiment.

[0033] Figure 2 is the cross-sectional view of a filter bag backwashing device for natural gas gas-phase deposition in an embodiment.

[0034] Figure 3 is Figure 2 the enlarged view of part A of

[0035] Figure 4 is Figure 2 the enlarged view of part B of

[0036] Description of the drawings: 1. Filter tank; 11. Intake pipe; 12. Exhaust pipe; 2. Filter bag assembly; 21. Filter bag orifice plate; 211. Mounting hole; 22. Filter bag skeleton; 23. Filter bag; 3. Backflush assembly; 31. Air pipe; 32. Shunt pipe; 33. Backflush pipe; 331. Backflush hole; 34. Sprinkler head; 341. Spray hole; 35. Support rod; 4. Solenoid valve; 5. Pressure transmitter; 6. Thermocouple. Detailed implementation manners

[0037] The following further elaborates on this application in conjunction with the attached Figures 1-4 drawings.

[0038] The embodiment of this application discloses a filter bag backflush device for natural gas chemical vapor deposition.

[0039] Referring to Figure 1 , a filter bag backflush device for natural gas chemical vapor deposition includes a filter tank 1, a backflush assembly 3, a solenoid valve 4, a pressure transmitter 5, and a thermocouple 6; the backflush assembly 3 is fixedly arranged on the top of the filter tank 1, and the backflush assembly 3 penetrates through the top wall of the filter tank 1; both the solenoid valve 4 and the pressure transmitter 5 are fixedly installed on the backflush assembly 3; the thermocouple 6 is fixedly installed on the top of the filter tank 1.

[0040] Referring to Figure 2 , the inner cavity of the filter tank 1 is provided with a filter bag assembly 2, and the filter bag assembly 2 includes a filter bag orifice plate 21, a filter bag skeleton 22, and a filter bag 23; the filter bag orifice plate 21 is fixedly connected to the inner wall of the filter tank 1 in the horizontal direction, and the filter bag orifice plate 21 divides the inner cavity of the filter tank 1 into upper and lower layers; a plurality of mounting holes 211 are provided on the filter bag orifice plate 21, and a plurality of filter bag skeletons 22 are respectively inserted into the mounting holes 211, the filter bag skeletons 22 are attached to the inner wall of the filter bag 23, and the upper ends of the filter bag skeletons 22 are engaged with the filter bag orifice plate 21, and the bag mouth of the filter bag 23 is clamped between the filter bag orifice plate 21 and the filter bag skeletons 22.

[0041] Referring to Figure 2 , the filter tank 1 is provided with an intake pipe 11 and an exhaust pipe 12; the intake pipe 11 is fixedly installed on the top wall of the filter tank 1, and the intake pipe 11 is communicated with the inner cavity of the filter tank 1, and the intake pipe 11 is located below the filter bag orifice plate 21; the exhaust pipe 12 is fixedly installed at one end near the bottom of the side wall of the filter tank 1, and the exhaust pipe 12 is communicated with the inner cavity of the filter tank 1, and the exhaust pipe 12 is located above the filter bag orifice plate 21; the residual gas of natural gas after pyrolysis enters the filter tank 1 from the intake pipe 11, and the sediment mixed in the residual gas is filtered by the filter bag assembly 2, and the filtered gas is discharged from the exhaust pipe 12 above the filter bag orifice plate 21 and enters the next process. In particular, a vacuum pump can also be connected to the outer end of the exhaust pipe 12 outside the filter tank 1. When the internal pressure of the filter tank 1 is too high, the vacuum pump is turned on to facilitate the discharge of gas to maintain the stability of the internal pressure of the filter tank.

[0042] Reference Figure 2 and Figure 3 As shown in FIGS. 1 and 2, the backwashing assembly 3 includes an air pipe 31, a shunt pipe 32, a backwashing pipe 33, and a nozzle 34. One end of the air pipe 31 is fixedly connected to a high-pressure gas source, and the other end extends into the inner cavity of the filter tank 1. The air pipe 31 is located above the filter bag orifice plate 21. The end of the air pipe 31 extending into the inner cavity of the filter tank 1 is fixedly connected to the shunt pipe 32. The shunt pipe 32 is horizontally placed above the filter bag orifice plate 21, and a plurality of support rods 35 are provided between the shunt pipe 32 and the filter bag orifice plate 21. A plurality of backwashing pipes 33 are provided on the shunt pipe 32. One end of the backwashing pipe 33 is fixedly connected to the side wall of the shunt pipe 32, and the other end extends into the inner wall of the filter bag 23. The backwashing pipe 33 is communicated with the inner cavity of the shunt pipe 32. The nozzle 34 is fixedly arranged at the end of the backwashing pipe 33 extending into the inner wall of the filter bag 23. The backwashing pipe 33 is a flexible pipe, and a plurality of backwashing holes 331 are formed in the side wall of the section of the backwashing pipe 33 extending into the inner wall of the filter bag 23. The plurality of backwashing holes 331 are regularly arranged along the length direction of the side wall of the backwashing pipe 33. The aperture and hole pitch of these backwashing holes 331 are accurately calculated by a specific calculation formula, aiming to ensure that from the top to the bottom of the backwashing pipe 33, the backwashing air flow can flow evenly and stably, so as to ensure that the deposits attached to the outer surface of the filter bag 23 can be blown off. Particularly, the gas of the high-pressure gas source is nitrogen. By injecting nitrogen into the filter bag 23, nitrogen, as an inert gas, has strong stability and is not prone to chemical reactions, which can improve the safety of the backwashing device.

[0043] Reference Figure 2 As shown in FIG. 3, the solenoid valve 4 is fixedly arranged on the side wall of the section of the air pipe 31 extending out of the filter tank 1, and the solenoid valve 4 is communicated with the inner cavity of the air pipe 31. By adjusting the opening and closing degree of the solenoid valve 4, the flow rate and air pressure of the high-pressure gas can be changed. The pressure transmitter 5 is fixedly arranged on the side wall of the section of the air pipe 31 extending out of the filter tank 1, and the pressure transmitter 5 is located between the solenoid valve 4 and the filter tank 1. The pressure transmitter 5 monitors the pressure in the air pipe 31 in real time. When the pressure difference in the air pipe 31 exceeds the set value, the solenoid valve 4 is opened, and the backwashing assembly 3 blows the filter bag 23. This is convenient for avoiding damage to the equipment caused by excessive pressure in the filter tank 1 due to blockage of the filter bag 23. The thermocouple 6 is fixedly arranged on the top of the filter tank 1, and the thermocouple 6 is inserted into the inner cavity of the filter tank 1. The thermocouple 6 monitors the temperature of the residual gas in the filter tank 1. When the gas temperature is too high, the supply of the residual gas to the filter tank 1 can be stopped, or the cooling device in the previous process section can be adjusted to avoid damage to the filter bag 23 caused by too high temperature in the filter tank 1. This is convenient for ensuring that the filter bag 23 is used within the normal working temperature range, thereby improving the service life of the filter bag 23. At the same time, it can also avoid the explosion of the gas and deposits in the inner cavity of the filter tank 1 at high temperature.

[0044] Reference Figure 4, the spray nozzle 34 is provided with a gas spraying hole 341 which communicates with the inner cavity of the backflush pipe 33; the axial direction of the gas spraying hole 341 is not parallel to the axial direction of the backflush pipe 33. When high-pressure gas is ejected through the gas spraying hole 341, the provided gas spraying hole 341 causes the spray nozzle 34 to receive a reaction force of the ejection, generating a flapping motion on the inner wall of the filter bag 23. During the flapping process of the spray nozzle 34, the spray nozzle 34 collides with the filter bag framework 22 and the inner wall of the filter bag 23, further causing the sediment accumulated on the outer surface of the filter bag 23 to fall off.

[0045] In addition, a control unit (not shown in the figure) can be provided in this embodiment. The control unit is electrically connected to the solenoid valve 4, the thermocouple 6, and the pressure transmitter 5. When the pressure transmitter 5 detects that the pressure difference is too large, it sends a signal to the control unit, and the control unit controls the solenoid valve 4 to open, enabling the backflush assembly 3 to blow air into the inner wall of the filter bag 23, avoiding manual monitoring and adjustment, and facilitating the improvement of the working efficiency of the backflush device.

[0046] The implementation principle of a filter bag backflush device for natural gas vapor deposition in this application is as follows: After the natural gas vapor deposition is completed, residual gas is generated. The residual gas enters the filter tank 1 from the inlet pipe 11. The filter bag assembly 2 provided in the filter tank 1 filters the residual gas. The sediment in the residual gas is blocked by the filter bag 23 and accumulates on the outer surface of the filter bag 23. The gas passes through the exhaust pipe 12 after filtration and enters the next process; during the filtration process, the pressure transmitter 5 monitors the pressure difference inside and outside the air pipe 31, and the thermocouple 6 monitors the internal temperature of the filter tank 1; when it is detected that the pressure difference is too large, the pressure transmitter 5 sends a signal to the control unit, and the control unit controls the solenoid valve 4 to open, enabling the high-pressure gas from the high-pressure gas source to enter the air pipe 31 and then enter the backflush pipe 33 from the air pipe 31. The backflush holes 331 on the backflush pipe 33 blow air to the filter bag 23. At the same time, the sediment on the outer surface of the filter bag 23 falls off. The spray nozzle 34 provided at the end of the backflush pipe 33 ejects gas. The obliquely arranged gas spraying holes 341 cause the spray nozzle 34 to receive a reaction force of the ejection, generating a flapping motion on the inner wall of the filter bag 23. During the flapping process of the spray nozzle 34, the spray nozzle 34 collides with the filter bag framework 22 and the inner wall of the filter bag 23, further causing the sediment accumulated on the outer surface of the filter bag 23 to fall off. When the thermocouple 6 detects that the internal temperature of the filter tank 1 is too high, the supply of residual gas to the filter tank 1 can be stopped, or the cooling device in the previous process section can be adjusted to avoid damage to the filter bag 23 caused by too high a temperature in the filter tank 1, and at the same time, to avoid the explosion of the gas and sediment in the filter tank 1 at high temperatures.

[0047] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A filter bag backwashing device for natural gas vapor deposition, characterized in that: It includes a filter tank (1), a filter bag assembly (2) and a backflush assembly (3); the filter bag assembly (2) is arranged in the inner cavity of the filter tank (1), the backflush assembly (3) is arranged at the top of the filter tank (1), the backflush assembly (3) extends into the inner cavity of the filter tank (1) and is arranged opposite to the filter bag assembly (2), and the backflush assembly (3) is used to blow air to the filter bag assembly (2). An air inlet pipe (11) and an exhaust pipe (12) are arranged on the filter tank (1); the air inlet pipe (11) is fixedly installed on the top wall of the filter tank (1), and the air inlet pipe (11) is communicated with the inner cavity of the filter tank (1), and the air inlet pipe (11) is located below the filter bag assembly (2). The exhaust pipe (12) is fixedly installed at one end near the bottom of the side wall of the filter tank (1), and the exhaust pipe (12) is communicated with the inner cavity of the filter tank (1), and the exhaust pipe (12) is located above the filter bag assembly (2).

2. The backwashing device for the filter bag used in natural gas vapor deposition according to claim 1, characterized in that: The filter bag assembly (2) includes a filter bag orifice plate (21), a filter bag skeleton (22) and a filter bag (23); the filter bag orifice plate (21) is fixedly connected with the inner wall of the filter tank (1) in the horizontal direction, a plurality of mounting holes (211) are arranged on the filter bag orifice plate (21), and a plurality of the filter bag skeletons (22) are respectively inserted into the mounting holes (211), the filter bag skeleton (22) is attached to the inner wall of the filter bag (23), and the upper end of the filter bag skeleton (22) is clamped with the filter bag orifice plate (21), and the bag mouth of the filter bag (23) is clamped between the filter bag orifice plate (21) and the filter bag skeleton (22).

3. The backflush device for a filter bag used in natural gas vapor deposition according to claim 2, characterized in that: The backflush assembly (3) includes an air pipe (31), a shunt pipe (32), a backflush pipe (33) and a spray head (34), one end of the air pipe (31) is fixedly connected with a high-pressure air source, and the other end extends into the inner cavity of the filter tank (1), the air pipe (31) is located above the filter bag orifice plate (21), and the end of the air pipe (31) extending into the inner cavity of the filter tank (1) is fixedly connected with the shunt pipe (32); the shunt pipe (32) is horizontally placed above the filter bag orifice plate (21), and a plurality of support rods (35) are arranged between the shunt pipe (32) and the filter bag orifice plate (21); a plurality of the backflush pipes (33) are arranged on the shunt pipe (32), one end of the backflush pipe (33) is fixedly connected with the side wall of the shunt pipe (32), and the other end extends into the inner wall of the filter bag (23), the backflush pipe (33) is communicated with the inner cavity of the shunt pipe (32), and the spray head (34) is fixedly arranged at the end of the backflush pipe (33) extending into the inner wall of the filter bag (23). The backflush pipe (33) is arranged as a flexible pipe.

4. The backwashing device for the filter bag used in natural gas vapor deposition according to claim 3, wherein: The spray head (34) is provided with air spray holes (341), and the air spray holes (341) are communicated with the inner cavity of the backflush pipe (33). The axial direction of the air spray holes (341) is not parallel to the axial direction of the backflush pipe (33).

5. The backwashing device for the filter bag used in natural gas vapor deposition according to claim 3, wherein: A plurality of backflush holes (331) are arranged on the side wall of the section of the backflush pipe (33) extending into the inner wall of the filter bag (23).

6. The backwashing device for a filter bag used in natural gas vapor deposition according to claim 3, characterized in that: It further includes a solenoid valve (4), the solenoid valve (4) is fixedly arranged on the side wall of the section where the air pipe (31) extends out of the filter tank (1), and the solenoid valve (4) communicates with the inner cavity of the air pipe (31).

7. The backflush device for a filter bag used in natural gas chemical vapor deposition according to claim 6, wherein: It further includes a pressure transmitter (5), the pressure transmitter (5) is fixedly arranged on the side wall of the section where the air pipe (31) extends out of the filter tank (1), and the pressure transmitter (5) is located between the solenoid valve (4) and the filter tank (1).

8. A filter bag backwashing device for natural gas vapor deposition according to claim 1, characterized in that: It further includes a thermocouple (6), the thermocouple (6) is fixedly arranged on the top of the filter tank (1), and the thermocouple (6) is inserted into the inner cavity of the filter tank (1).

9. A backflush device for a filter bag used in natural gas vapor deposition according to claim 7, characterized in that: It further includes a control unit, and the control unit is electrically connected to the solenoid valve (4) and the pressure transmitter (5).

Images