Detection tail gas recovery treatment equipment

Abstract

The utility model discloses detection tail gas recovery processing equipment, which relates to the technical field of tail gas recovery devices and comprises a buffer tank, a compressor and a storage steel cylinder which are sequentially communicated with tail gas, the detection tail gas enters the tail gas buffer tank through a first pipeline, and a filter is mounted on the first pipeline and comprises a device body with a cavity. A plurality of filter screens which are arranged in a staggered mode are arranged on a cover plate of the device body, the cavity is divided into a snakelike barrier-free airflow channel by the filter screens, and the filter screens are oil absorption paper filter screens and absorbent cotton filter screens which are distributed alternately. When the detection tail gas flows through the filter, the tail gas directly impacts on the filter screens, so that oil stains and water vapor in the tail gas are adsorbed by the filter screens, the content of the oil stains and the water vapor in the detection tail gas entering the tail gas buffer tank is reduced, and the contact effect of the tail gas and each filter screen can be improved through the design of the snake-shaped barrier-free airflow channel; therefore, erosion of the detected tail gas to the interior of the tail gas buffer tank can be slowed down.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas recovery devices, and particularly to a device for detecting tail gas recovery and treatment equipment. Background Technique

[0002] During the operation of GIS electrical equipment, under the influence of moisture, impurities, and discharges, various toxic, harmful, and corrosive substances will be generated. The gas discharged into the atmosphere after detection will pose great harm to the normal operation of electrical equipment and the personal safety of staff.

[0003] For the detected gas, it will sequentially pass through a tail gas buffer tank, a micro-compressor, and a steel cylinder storage tank. One end of the tail gas buffer tank is connected to the sulfur hexafluoride test tail gas inlet, which is used for temporarily storing the test tail gas and stabilizing the air pressure of the tail gas to ensure the accuracy of detector detection. The other end of the tail gas buffer tank is connected to the micro-compressor, which is used for compressing and recovering the tail gas. The other end of the micro-compressor is connected to the steel cylinder storage tank, and finally the compressed test tail gas is stored in the steel cylinder. Finally, the test tail gas is recovered into the steel cylinder. The gas storage steel cylinder is selected in an external placement method, and the full steel cylinder can be replaced at any time.

[0004] In the prior art, the discharged gas detected by the detector can be recovered and treated. However, after the detector stops detecting, the air outlet valve of the detector will close, and a part of the tail gas discharged by the detector will remain in the tail gas buffer tank. On the one hand, this part of the tail gas existing in the tail gas buffer tank for a long time has a risk of leakage. On the other hand, the residual oil and water vapor in the detected tail gas will slowly erode the inner wall of the tail gas buffer tank and the internal diversion buffer structure, thus having a negative impact on the buffering effect of the tail gas buffer tank and also reducing the service life of the tail gas buffer tank. Content of the Utility Model

[0005] The purpose of the utility model is to provide a device for detecting tail gas recovery and treatment equipment to solve the problem that the inner part of the tail gas buffer tank is eroded due to the long-term retention of the detected tail gas containing oil and water vapor, thereby reducing the buffering effect of the detected tail gas and the service life of the tail gas buffer tank.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A device for detecting tail gas recovery and treatment equipment, including a buffer tank, a compressor, and a storage steel cylinder that are sequentially connected to the tail gas. The detected tail gas enters the tail gas buffer tank through a first pipeline. A filter for filtering the detected tail gas flowing through its interior is installed on the first pipeline. The filter includes a body with a cavity. One side of the body has a detachable cover plate. A plurality of staggered filter meshes are arranged on the cover plate. Each filter mesh divides the cavity into a serpentine unobstructed air flow channel. Each filter mesh is an alternately distributed oil-absorbing paper filter mesh and a water-absorbing cotton filter mesh.

[0007] Furthermore, the cover plate includes a panel and an inner plug plate fixedly connected to the panel, and a plurality of slots of equal length and staggered arrangement are provided on the inner plug plate, and each slot is plugged and matched with each filter screen in a one-to-one correspondence.

[0008] Furthermore, the cover plate is fixedly connected to the device body by a plurality of bolts, and a sealing gasket is arranged between the periphery of the panel and the periphery of the opening of the device body.

[0009] Furthermore, the first pipeline is connected to a high-pressure gas tank through a branch pipe, a first solenoid valve is installed on the branch pipe, a differential pressure sensor is installed in the first pipeline, and the differential pressure sensor, the first solenoid valve and the compressor are electrically connected to a controller respectively.

[0010] Furthermore, the exhaust gas buffer tank is connected to the compressor through a second pipeline, a second solenoid valve is installed on the second pipeline, and the compressor is connected to the storage cylinder through a third pipeline.

[0011] Furthermore, it also includes a purifier, and the third pipeline includes a first tube body and a second tube body, one end of the first tube body is connected to the air outlet of the compressor, and the other end of the first tube body is connected to the air inlet of the purifier, one end of the second tube body is connected to the air outlet of the purifier, and the other end of the second tube body is connected to the air inlet of the storage cylinder.

[0012] Furthermore, the high-pressure gas tank is filled with inert gas.

[0013] Furthermore, a three-way valve is installed on the third pipeline, and the three-way valve has an air inlet and two air outlets. The air inlet of the three-way valve is connected to the third pipeline, one of the air outlets of the three-way valve is connected to the storage cylinder, and the other air outlet of the three-way valve is connected to a spare cylinder.

[0014] Compared with the prior art, the utility model provides a detection exhaust gas recovery and processing equipment. When the detection exhaust gas flows through the filter, the exhaust gas will directly impact the filter net, so that the filter net absorbs the oil and water vapor therein, thereby reducing the oil and water vapor content in the detection exhaust gas entering the exhaust gas buffer tank. The serpentine unobstructed airflow channel design can increase the contact effect between the exhaust gas and each filter net, thereby slowing down the erosion of the detection exhaust gas on the inside of the exhaust gas buffer tank; and the alternately arranged filter nets have a preliminary buffering effect on the flow of the detection exhaust gas, which is close to the effect achieved by the exhaust gas buffer tank, and both can play a role in stabilizing the airflow; in addition, when the filter net is attached with a lot of oil and is not cleaned in time, the difficulty of the detection exhaust gas directly passing through the filter net increases, and the detection exhaust gas can pass through the serpentine unobstructed airflow channel, so that the permeability of the detection exhaust gas in the cavity can still be maintained good, because the primary thing is to ensure the stability of the detection exhaust gas flow to ensure the accuracy of the detection result of the detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0016] Figure 1 Schematic diagram of the overall structure of the device provided by the embodiment of the present utility model;

[0017] Figure 2 Schematic diagram of the structure of the three-way valve connecting the storage cylinder and the spare cylinder provided by the embodiment of the present utility model;

[0018] Figure 3 Schematic diagram of the structure of the filter provided by the embodiment of the present utility model;

[0019] Figure 4 Cross-sectional view of the filter provided by the embodiment of the present utility model;

[0020] Figure 5 Schematic diagram of the structure of the cover plate provided by the embodiment of the present utility model.

[0021] Explanation of reference numerals:

[0022] 1. Tail gas buffer tank; 11. First pipeline; 111. Differential pressure sensor; 2. Compressor; 21. Second pipeline; 211. Second solenoid valve; 3. Storage cylinder; 31. Third pipeline; 311. First pipe body; 312. Second pipe body; 4. High-pressure gas tank; 41. Branch pipe; 411. First solenoid valve; 5. Controller; 6. Purifier; 7. Three-way valve; 8. Spare cylinder; 9. Filter; 91. Body; 92. Cover plate; 921. Panel; 922. Inner plug plate; 923. Slot; 93. Filter screen. Detailed implementation manners

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail with reference to the drawings.

[0024] Please refer to Figures 1-5, a tail gas recovery and treatment device provided by an embodiment of the present utility model includes a tail gas buffer tank 1, a compressor 2, and a storage cylinder 3. The detection tail gas discharged from the detector enters the tail gas buffer tank 1 through a first pipeline 11. The tail gas buffer tank 1 adopts the prior art and has a diversion and buffer structure inside. The tail gas buffer tank 1 is used for temporarily storing the test tail gas and stabilizing the air pressure of the tail gas, so that the detector gas can maintain stability when passing through, ensuring the accuracy of detection. The tail gas buffer tank 1 is connected to the compressor 2 through a second pipeline 21, that is, one end of the second pipeline 21 is connected to the exhaust port of the tail gas buffer tank 1, and the other end is connected to the intake port of the compressor 2. The compressor 2 is connected to the storage cylinder 3 through a third pipeline 31; a high-pressure gas tank 4 is connected to the first pipeline 11 through a branch pipe 41, and a first solenoid valve 411 is installed on the branch pipe 41; a differential pressure sensor 111 is installed in the first pipeline 11. The differential pressure sensor 111 is used for detecting the differential pressure signal in the first pipeline 11 and transmitting the differential pressure signal to a controller 5. The controller 5 is used for controlling the opening and closing of the first solenoid valve 411 and the compressor 2. A second solenoid valve 211 is installed on the second pipeline 21. When the differential pressure signal is positive, the controller 5 controls the compressor to start; when the differential pressure signal returns from positive to 0 (the differential pressure signal is 0 when the air outlet of the detector does not transport gas into the tail gas buffer tank 1, and the differential pressure signal is positive during the process of the air outlet of the detector transporting tail gas into the tail gas buffer tank 1), the controller 5 controls the first solenoid valve 411 to open for t time and then closes both the first solenoid valve 411 and the compressor 2 simultaneously.

[0025] A filter 9 is installed on the first pipe 11. The filter 9 is used to filter the detection exhaust gas flowing through the first pipe 11. The filter 9 includes a body 91, a body 91 and a plurality of filter screens 93. The body 91 has a cavity. The cavity cuts the first pipe 11 into two sections and connects them. The cover plate 92 is detachably connected to one side of the body 91 by bolts. The cover plate 92 specifically includes a panel 921 and an inner plug plate 922. The inner plug plate 922 is fixedly connected to the inner middle part of the panel 921. A sealing gasket is arranged around the panel 921 and the open area of ​​the body 91. The inner plug plate 922 is provided with a plurality of slots 923 of equal length and staggered arrangement. Each slot 923 is plugged and matched with each filter screen in a one-to-one correspondence. Specifically, one end of the fixed frame around the filter screen 93 is plugged into the corresponding slot 923. Therefore, each filter screen 93 is also staggered on the cover plate 92. Each alternately arranged filter screen 93 divides the cavity into a serpentine unobstructed airflow channel. For any slot 923, only one end thereof in the length direction is connected to the edge side of the inner plug plate 922, and the corresponding filter 93 is inserted into the slot 923 from the end of the slot 923 that passes through the edge side of the inner plug plate 922, and the mouth of the slot 923 (the mouth faces the cavity of the body 91) is a constricted mouth, and its width is smaller than the internal width of the slot 923, which can prevent the filter 93 from directly detaching from the mouth. The plug-in design of the filter 93 can facilitate replacement or cleaning of the mesh surface.

[0026] In each filter 93, a part is an oil-absorbing paper filter that can absorb oil, and the other part is a water-absorbing cotton filter that can absorb water vapor. Each oil-absorbing paper filter and each water-absorbing paper filter are alternately distributed. On the one hand, when the test exhaust gas flows through the filter 9, the exhaust gas will directly impact the filter 93, so that the oil and water vapor therein are absorbed by the filter 93, thereby reducing the oil and water vapor content in the test exhaust gas entering the exhaust buffer tank 1. The serpentine unobstructed airflow channel design can increase the contact effect between the exhaust gas and each filter 93; on the other hand, each alternately arranged filter 93 has a preliminary buffering effect on the flow of the test exhaust gas, which is close to the effect achieved by the exhaust buffer tank 1, and both can play a role in stabilizing the airflow; on the other hand, when the filter 93 is attached with a lot of oil and is not cleaned in time, the permeability of the test exhaust gas in the cavity can still be maintained well, because the test exhaust gas can pass through the serpentine unobstructed airflow channel, and the stability of the flow of the test exhaust gas is still given priority, and the primary purpose is to ensure the detection accuracy of the detector.

[0027] A purifier 6 is provided on the third pipeline 31. The third pipeline 31 includes a first pipe body 311 and a second pipe body 312. One end of the first pipe body 311 is communicated with the air outlet of the compressor 2, and the other end of the first pipe body 311 is communicated with the air inlet of the purifier 6. One end of the second pipe body 312 is communicated with the air outlet of the purifier 6, and the other end of the second pipe body 312 is communicated with the air inlet of the storage cylinder 3. One end of the first pipeline 11 is communicated with the exhaust port of the detector, and the other end is communicated with the air inlet of the tail gas buffer tank 1.

[0028] The exhaust port of the detector transports gas to the tail gas buffer tank 1 through the first pipeline 11. First, each filter screen 93 in the filter 9 plays a primary filtering effect on the tail gas (certain GIS device detection gases contain impurities such as oil stains. For example, the activated carbon filter screen 93 can conduct primary filtering on the discharged detection tail gas). In addition, each filter screen 93 divides the cavity into a serpentine unobstructed air flow channel, and each filter screen 93 plays a primary buffering role. Then, the detection gas discharges from the filter 9 and enters the other section of the first pipeline 11. The differential pressure sensor 111 transmits the positive differential pressure signal in the first pipeline 11 to the second solenoid valve 211 and the compressor 2 through the controller 5. The tail gas enters the tail gas buffer tank 1, and the tail gas buffer tank 1 plays a role in stabilizing the air flow and reducing pressure fluctuations (the ability of the tail gas buffer tank 1 to stabilize the air flow and reduce pressure fluctuations is prior art and will not be elaborated here). The gas passing through the tail gas buffer tank 1 will enter the compressor 2 through the second pipeline 21. The compressor 2 compresses the gas entering it. Then, the compressed gas enters the purifier 6 through the first pipe body 311. The purifier 6 purifies the detection tail gas discharged by the detector (the ability of the purifier 6 to purify the tail gas discharged by the detector is prior art). The purified gas enters the storage cylinder 3 through the second pipe body 312 to realize the recovery and storage of the tail gas. When the detector stops working, the outlet valve of the detector is closed. After there is no longer a stable supply of detection tail gas in the first pipeline 11, the differential pressure sensor 111 on the first pipeline 11 will transmit a differential pressure signal of 0 to the controller 5. The controller 5 controls the first valve to open for a time period t. During this time period, the gas in the high-pressure gas tank 4 will be transported to the first pipeline 11 through the branch pipe 41, and then enter the tail gas buffer tank 1 through the first pipeline 11. The gas discharged from the high-pressure gas tank 4 will push the remaining gas in the tail gas buffer tank 1 into the compressor 2, and the compression, purification, and storage processes will be carried out as described above. After the time period t, the first solenoid valve 411, the second solenoid valve 211, and the compressor 2 will be closed synchronously. It is worth mentioning that the gas detected by the detector for gas detection of GIS devices is mainly a mixed gas of SF6 and N2, and SF6 is the main polluting gas of the greenhouse effect. Therefore, the detection gas needs to be recovered to prevent the detection tail gas from leaking into the air. In addition, a third solenoid valve (not shown in the figure) is installed on the first pipeline 11. After the exhaust port of the detector is disconnected from the first pipeline 11, the third solenoid valve can be closed to prevent air from flowing into the first pipeline 11 (the first pipeline 11 can be disconnected from the exhaust port of the detector. After the first pipeline 11 is disconnected from the exhaust port of the detector, since the second solenoid valve 211 and the compressor 2 are closed, even if air enters the first pipeline 11, the differential pressure sensor 111 will not reach a positive value).

[0029] A tail gas detection and recovery treatment device provided by the utility model. After the detection tail gas stops delivering gas into the tail gas buffer tank 1, the differential pressure sensor 111 will open the first electromagnetic valve 411 through the controller 5. The gas in the high-pressure gas tank 4 will flow into the first pipeline 11, and then enter the tail gas buffer tank 1 from the first pipeline 11. In this way, the gas discharged from the high-pressure gas tank 4 can push the residual tail gas in the tail gas buffer tank 1 into the compressor 2, where it is compressed and then enters the storage cylinder 3. This can avoid the risk of leakage of the remaining tail gas remaining in the tail gas buffer tank 1 after the detector stops discharging the detection gas, and also avoid the influence of impurities in the tail gas staying in the tail gas buffer tank 1 for a long time on the buffering performance of the tail gas buffer tank 1.

[0030] A three-way valve 7 is installed on the third pipeline 31. The three-way valve 7 has one intake port and two outlet ports. One intake port of the three-way valve 7 is connected to the storage cylinder 3, and the other outlet port of the three-way valve 7 is connected to the spare cylinder 8. During the storage process, the storage cylinder 3 is connected to the intake port of the storage cylinder 3 through the three-way valve 7 and the third pipeline 31. When the storage cylinder 3 is about to be filled with tail gas and it is still necessary to store the tail gas compressed by the subsequent compressor 2, the operator can rotate the three-way valve 7 to connect the third pipeline 31 to the spare cylinder 8. Before this operation, the user needs to install the spare cylinder 8 on the three-way valve 7 in advance (detecting the amount of tail gas stored in the storage cylinder 3 is a prior art, such as realized by a gravity sensor, etc., and the specific process will not be elaborated here). Here, the two outlet ports of the three-way valve 7 are respectively connected to the storage cylinder 3 and the spare cylinder 8 through quick-connect pipe fittings (the quick-connect pipe fittings automatically close the intake port or the outlet port after disconnecting the connection).

[0031] Among them, the high-pressure gas tank 4 is filled with an inert gas, and this inert gas is nitrogen. Nitrogen is non-toxic and its emission will not cause the greenhouse effect.

[0032] Among them, the tail gas buffer tank 1 has a diversion and buffering structure (not shown in the figure). Installation plates or installation frames are arranged at the lower and upper parts of the inner wall of the tank body, and the diversion plates are installed staggeredly and obliquely on the opposite surfaces of the installation plates or installation frames. For example, in a buffer tank for waste gas treatment, the lower gas buffering mechanism 1 includes a pair of installation plates, and diversion plates 1 are arranged staggeredly and obliquely on the plates. The intake port is located between the two installation plates; the upper gas buffering mechanism 2 includes an installation frame, and diversion plates 2 are also arranged staggeredly and obliquely on the inner walls on both sides of the frame. Such an arrangement can make the tail gas bend multiple times in the tank, extend the airflow path, and increase the buffering effect.

[0033] Only some exemplary embodiments of the present utility model are described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A detection tail gas recovery and processing device, comprising a tail gas buffer tank (1), a compressor (2) and a storage cylinder (3) connected in sequence, wherein the detection tail gas enters the tail gas buffer tank (1) through a first pipeline (11); characterized in that: A filter (9) for filtering the detection exhaust gas flowing through the first pipe (11) is installed on the first pipe (11), the filter (9) comprising a body (91) having a cavity, a detachable cover plate (92) being provided on one side of the body (91), a plurality of staggered filter screens (93) being provided on the cover plate (92), each filter screen (93) dividing the cavity into a serpentine unobstructed airflow channel, each filter screen (93) being an oil-absorbing paper filter screen and a water-absorbing cotton filter screen that are alternately distributed.

2. The tail gas recovery and treatment equipment according to claim 1, characterized in that: The cover plate (92) comprises a panel (921) and an inner plug plate (922) fixedly connected to the panel (921); the inner plug plate (922) is provided with a plurality of slots (923) of equal length and arranged in a staggered manner; each slot (923) is plugged and matched with each filter screen in a one-to-one correspondence.

3. The tail gas recovery and treatment equipment according to claim 2, characterized in that: The cover plate (92) is fixedly connected to the body (91) by means of a plurality of bolts, and a sealing gasket is provided between the periphery of the panel (921) and the periphery of the opening of the body (91).

4. The detection tail gas recovery and treatment equipment according to claim 1, characterized in that: The first pipeline (11) is connected to a high-pressure gas tank (4) via a branch pipe (41); a first solenoid valve (411) is installed on the branch pipe (41); a differential pressure sensor (111) is installed in the first pipeline (11); the differential pressure sensor (111), the first solenoid valve (411) and the compressor (2) are respectively electrically connected to a controller (5).

5. The detection tail gas recovery and treatment equipment according to claim 1, characterized in that: The exhaust gas buffer tank (1) is connected to the compressor (2) via a second pipeline (21), a second solenoid valve (211) is installed on the second pipeline (21), and the compressor (2) is connected to the storage cylinder (3) via a third pipeline (31).

6. The tail gas recovery and treatment equipment according to claim 5, characterized in that: The invention also comprises a purifier (6), wherein the third pipeline (31) comprises a first tube body (311) and a second tube body (312), wherein one end of the first tube body (311) is connected to the air outlet of the compressor (2), and the other end of the first tube body (311) is connected to the air inlet of the purifier (6), one end of the second tube body (312) is connected to the air outlet of the purifier (6), and the other end of the second tube body (312) is connected to the air inlet of the storage cylinder (3).

7. The tail gas recovery and treatment equipment according to claim 4, characterized in that: The high-pressure gas tank (4) is filled with inert gas.

8. The tail gas recovery and treatment equipment according to claim 5, characterized in that: A three-way valve (7) is installed on the third pipeline (31), and the three-way valve (7) has an air inlet and two air outlets. The air inlet of the three-way valve (7) is connected to the third pipeline (31), one of the air outlets of the three-way valve (7) is connected to the storage cylinder (3), and the other air outlet of the three-way valve (7) is connected to a spare cylinder (8).

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