Tail gas incineration auxiliary purification equipment for raw gas treatment

Abstract

The invention discloses tail gas incineration auxiliary purification equipment for raw coke oven gas treatment, and relates to the technical field of tail gas incineration, the tail gas incineration auxiliary purification equipment comprises a gas pipeline, the outer wall of the gas pipeline is fixedly connected with a pair of positioning plates, a pore plate body is connected between the pair of positioning plates in an abutting mode, and the bottoms of the positioning plates fixedly communicate with ventilation pipes. The self-maintenance effect can be achieved for the slightly-deformed pore plate body, the annular wing plates on the two sides are connected through the correcting plate arranged in the T shape, the stress area of the two sides of the correcting plate is increased, the gas impact force borne by the protruding position in the middle of the correcting plate is effectively reduced, the correcting plate can be kept in the good vertical state, the pore plate body is supported in an auxiliary mode, and the correcting effect is good. And the correction plate always slides on the outer wall of the pore plate body in a vertical state when rotating, and the slightly deformed sheet pore plate body can be subjected to auxiliary correction under the action of high-speed rotation, so that the service life of the sheet pore plate body is prolonged, and the influence on the measurement accuracy caused by appearance deformation of the pore plate body is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of tail gas incineration, and in particular to a tail gas incineration auxiliary purification device for raw coal gas treatment. Background Art

[0002] After the raw coal gas is subjected to the PSA (pressure swing adsorption) process to extract carbon monoxide and hydrogen, the generated analytical gas mainly contains nitrogen, carbon dioxide, and possibly a small amount of hydrogen sulfide and other gases. The analytical gas then needs to be sent to the tail gas incineration device for harmless treatment, which is mainly divided into pretreatment, incineration, waste heat recovery, flue gas purification, emission monitoring and standard emission. During the incineration process, the flue gas needs to be purified with the cooperation of auxiliary devices, so that the harmful substances in the tail gas react chemically with oxygen at high temperature to generate carbon dioxide, water vapor and other harmless substances to meet the emission standards; In the prior art, the pre-treated analytical gas needs to be sent to the incinerator for high-temperature incineration. The incinerator is usually designed to ensure that the gas is fully burned at high temperature to decompose the harmful substances therein. During the incineration process, the exhaust gas flow rate and the appropriate air flow rate and temperature need to be controlled to ensure the combustion efficiency and the removal rate of harmful substances. The commonly used method is to use the orifice plate measurement method. The specific operation is to install a metal sheet with a circular opening (i.e., an orifice plate) in the pipeline. When the gas flows through the orifice plate, a pressure difference will be generated. The pressure difference between the air holes before and after the orifice plate is measured by a differential pressure transmitter, and the flow rate and volume flow of the exhaust gas and the combustion air can be calculated. Then, the flow signal is sent to the control system using the differential pressure transmitter, thereby realizing accurate control of the flow rate. This method relies on the accuracy of the orifice plate and the stability of the differential pressure transmitter. If the orifice plate is deformed or the transmitter fails, it is likely to affect the accuracy of the flow measurement. In addition, current equipment requires maintenance personnel to frequently inspect and maintain the differential pressure transmitter. Since common faults of differential pressure transmitters are diverse, such as zero drift, increased measurement error, abnormal output signal, three-valve group leakage and installation problems, maintenance personnel are often required to suspend the equipment, which makes maintenance time-consuming and has an adverse impact on production efficiency.

[0003] In view of this, the present invention proposes an exhaust gas incineration auxiliary purification device for raw gas treatment to make up for and improve the shortcomings of the prior art. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an exhaust gas incineration auxiliary purification equipment for raw gas treatment, which can assist in correcting deformed orifice plates, can adaptively ventilate, and can improve production efficiency, so as to solve the corresponding technical problems raised in the above background technology.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: an auxiliary purification device for tail gas incineration for raw coal gas treatment, comprising a gas pipeline, a pair of positioning plates are fixedly connected to the outer wall of the gas pipeline, a hole plate body is abutted between the pair of positioning plates, the bottom of the positioning plates are fixedly connected to a ventilation pipe, and the bottom of the ventilation pipe is fixedly connected to a differential pressure transmitter; Also included are: An auxiliary correction mechanism, used to assist in correcting the deformed orifice plate body and self-maintain the vent pipe; The backup switching mechanism is used to quickly switch the backup detection device to accurately measure the result.

[0006] Preferably, the auxiliary correction mechanism includes a micro motor fixedly connected to the inner wall of the positioning plate, the output end of the micro motor is fixedly connected to a gear, four gears are provided, the centers of the four gears are rotatably connected to the inner wall of the gas pipeline, the outer walls of the two gears are meshedly connected to a gear ring, the inner walls of the two gear rings are fixedly connected to an annular wing plate, an annular groove is provided on one side of the gas pipeline close to the orifice plate body, and the two annular wing plates are slidably connected in the annular groove.

[0007] Preferably, the auxiliary correction mechanism also includes a correction plate detachably connected to the inner wall of the ring wing plate, and a plurality of the ring wing plates are provided, and the plurality of correction plates are equidistantly distributed on one side of the two ring wing plates close to each other, and a pair of circular rings are fixedly connected to the outer wall of the correction plate, and the circular rings and the inner wall of the correction plate are both slidably connected to the outer wall of the orifice plate body, and extrusion plates are fixedly connected on both sides of the correction plate, and the plurality of extrusion plates are slidably connected between the circular rings and the ring wing plates.

[0008] Preferably, the auxiliary correction mechanism also includes a telescopic sleeve slidably connected to the top of the ventilation pipe, the outer walls of the two telescopic sleeves are fixedly connected to a pair of side plates, the bottoms of the telescopic sleeves are fixedly connected to return springs, the bottoms of the two return springs are fixedly connected to the inner wall of the gas pipeline, and the outer wall of the telescopic sleeve is also located between the circular ring and the ring wing plate.

[0009] Preferably, the standby switching mechanism includes a slider slidably connected to the bottom of the ventilation pipe, the bottom of the slider is slidably connected to a mounting bracket, the mounting bracket is fixedly connected to the top of the differential pressure transmitter, and the side of the mounting bracket away from the ventilation pipe is fixedly connected to a differential pressure gauge.

[0010] Preferably, the standby switching mechanism also includes a pair of fixed tubes fixedly connected to the inner wall of the slider, the pair of fixed tubes are both located on the side of the inner wall of the slider away from the differential pressure gauge, the upper and lower outer walls of the fixed tubes are slidably sleeved with a first sealing sleeve, the two pairs of first sealing sleeves are fixedly connected to the first spring on the side close to each other, the two pairs of ends close to each other are fixedly connected to the inner wall of the slider, the side of the slider close to the differential pressure gauge is fixedly connected with a pair of sliding tubes, the pair of sliding tubes are slidably connected to the middle part of the differential pressure gauge, the top of the sliding tubes are slidably sleeved with a second sealing sleeve, the bottom of the pair of second sealing sleeves are fixedly connected to a second spring, and the bottom of the second spring is fixedly connected to the inner wall of the slider.

[0011] Preferably, the standby switching mechanism also includes handles slidably connected to both sides of the slider, and the two handles are fixedly connected to a pull rope on one side close to the slider, and the pull rope is fixedly connected to a connecting rod on the other end away from the handle. Three connecting rods are provided, two of which are fixedly connected to the outer walls of the upper and lower pairs of first sealing sleeves respectively, and the other connecting rod is fixedly connected to the outer walls of the two second sealing sleeves, and the outer walls of the pull rope and the connecting rod are slidably connected to the inner wall of the slider.

[0012] Preferably, a plurality of limit baffles are provided on one side of the handle close to the slide block.

[0013] Preferably, the correction plate is T-shaped and the protrusion in the middle is set to be U-shaped.

[0014] Preferably, the top of the telescopic sleeve is configured to be in an arc shape.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. When the ventilation into the gas pipeline is stopped, the auxiliary correction mechanism can achieve the effect of self-maintenance for the slightly deformed orifice plate body. The two side ring wing plates are connected by a T-shaped correction plate, which increases the force-bearing area on both sides of the correction plate, effectively reduces the gas impact force received by the raised position in the middle of the correction plate, so that the correction plate can maintain a good vertical state, assist in supporting the orifice plate body, and always maintain a vertical state when the correction plate rotates and slides on the outer wall of the orifice plate body. Under the action of high-speed rotation, the slightly deformed thin sheet orifice plate body can be assisted to correct, thereby extending its service life and avoiding the deformation of the orifice plate body and affecting the measurement accuracy; Among them, the correction plate can also scrape off a small amount of impurities that may adhere to the surface of the orifice plate body, increase the smoothness of the orifice plate surface, and thus reduce the gas flow resistance. The detachable installation of the correction plate also increases the cleaning and replacement effect. In addition, the thickness of the ring wing plate is the same as the depth of the ring groove, and the inner diameter of the ring wing plate is consistent with the inner diameter of the gas pipeline, which can avoid increasing the gas resistance and reduce the operating consumption of the external air intake pump. There are also four symmetrical groups of gears, which play a supporting role and reduce the friction between the correction plate and the orifice plate body, and between the ring wing plate and the gas pipeline, ensuring the smoothness of rotation. 2. Through the coordinated setting of the telescopic sleeve and the extrusion plate, when the correction plate stops just above the vent pipe and causes an obstruction, the extrusion plate will squeeze the telescopic sleeve downward and compress the reset spring. Therefore, through the arc-shaped setting at the top of the telescopic sleeve and the rebound force of the reset spring, the extrusion plate can be pushed to the side of the telescopic sleeve, so that the correction plate automatically produces a small amount of rotational displacement, exposing the vent pipe and the top of the telescopic sleeve, so that the vent pipe can normally receive the airflow, thereby ensuring the accuracy of the value of the differential pressure transmitter. In addition, the side plate plays a limiting role, ensuring that the arc surface of the telescopic sleeve always fits with the extrusion plate, which is convenient for adaptively pushing the extrusion plate open; 3. When ventilating the gas pipeline normally, the standby switching mechanism is set to randomly switch the standby differential pressure gauge to measure the differential pressure value. The obtained data is compared with the value of the differential pressure transmitter. If it exceeds the error range, maintenance personnel are required to troubleshoot the fault to prevent the transmitter from failing and being unable to detect the fault. In addition, the handle with a limited baffle is set, and the handle can slide a certain distance. Through structural linkage, a simple pulling action can complete the switching of a pair of ventilation pipes, and the switching action can be completed during the ventilation process, without suspending the equipment for inspection and maintenance, thereby improving production efficiency; 4. Through the setting of the pull rope and the connecting rod, since the sliding distance of the handle is consistent with the moving distance of the first sealing sleeve and the second sealing sleeve, after pulling the handle, the sealing sleeve on one side can be completely compressed through the connecting rod to release the limit of the ventilation pipe from the fixed pipe. When the ventilation pipe slides to the other side of the slider, because the outer walls of the first sealing sleeve and the second sealing sleeve are both provided with arc ends, the ventilation pipe is automatically connected to the top of the sliding pipe to complete the synchronous switching of the two ventilation pipes. Compared with the traditional regulating valve, the synchronous switching not only improves the switching speed, but also prevents gas leakage through the design of the sealing sleeve, increases the measurement accuracy, and thus reduces the difficulty of system maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention; Figure 2 It is a schematic diagram of a side-view stereoscopic structure of the present invention; Figure 3It is a schematic diagram of a partial explosion structure shown in the present invention; Figure 4 It is a structural schematic diagram of the connection of the ring wing plate shown in the present invention; Figure 5 It is a structural schematic diagram of the ring connection shown in the present invention; Figure 6 It is a structural schematic diagram of the telescopic sleeve connection shown in the present invention; Figure 7 It is a structural schematic diagram of the connection of the extruded plates shown in the present invention; Figure 8 A partial cross-sectional view of a slider shown in the present invention; Fig. 9 It is a structural schematic diagram of the fixed pipe connection shown in the present invention; Fig.10 It is a schematic structural diagram of the pull rope connection shown in the present invention.

[0017] The numbers in the figure are: 1. Gas pipeline; 2. Positioning plate; 3. Ventilation pipe; 4. Differential pressure transmitter; 5. Orifice plate body; 6. Auxiliary correction mechanism; 61. Micro motor; 62. Correction plate; 63. Ring wing plate; 64. Gear ring; 65. Extrusion plate; 66. Gear; 67. Ring groove; 68. Ring; 69. Telescopic sleeve; 610. Side plate; 611. Return spring; 7. Standby switching mechanism; 71. Differential pressure gauge; 72. Sliding block; 73. Mounting frame; 74. Handle; 75. Fixed tube; 76. First sealing sleeve; 77. First spring; 78. Second sealing sleeve; 79. Second spring; 710. Sliding tube; 711. Connecting rod; 712. Pull rope. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiments of the present invention: Please refer to Figures 1 to 10 As shown, a tail gas incineration auxiliary purification device for treating raw coal gas comprises a gas pipeline 1, a pair of positioning plates 2 are fixedly connected to the outer wall of the gas pipeline 1, a hole plate body 5 is abutted between the pair of positioning plates 2, a ventilation pipe 3 is fixedly connected to the bottom of the positioning plates 2, and a differential pressure transmitter 4 is fixedly connected to the bottom of the ventilation pipe 3, and also comprises: An auxiliary correction mechanism 6, used for assisting in correcting the deformed orifice plate body 5 and self-maintaining the vent pipe 3; A standby switching mechanism 7, used to quickly switch the standby detection device to accurately measure the result; The auxiliary correction mechanism 6 includes a micro motor 61 fixedly connected to the inner wall of the positioning plate 2, and the output end of the micro motor 61 is fixedly connected to a gear 66. There are four gears 66, and the centers of the four gears 66 are rotatably connected to the inner wall of the gas pipeline 1. The outer walls of the two gears 66 are meshed and connected with a gear ring 64. The inner walls of the two gear rings 64 are fixedly connected with a ring wing plate 63. A ring groove 67 is opened on one side of the gas pipeline 1 close to the orifice plate body 5, and the two ring wing plates 63 are slidably connected in the ring groove 67. The auxiliary correction mechanism 6 also includes a correction plate 62 detachably connected to the inner wall of the ring wing plate 63. The ring wing plates 63 are provided in plurality, and the plurality of correction plates 62 are equidistantly distributed on the side where the two ring wing plates 63 are close to each other. The outer wall of the correction plate 62 is fixedly connected with a pair of circular rings 68. The circular rings 68 and the inner wall of the correction plate 62 are both slidably connected to the outer wall of the orifice plate body 5. Both sides of the correction plate 62 are fixedly connected with extrusion plates 65. The plurality of extrusion plates 65 are slidably connected between the circular rings 68 and the ring wing plates 63. The auxiliary correction mechanism 6 also includes a telescopic sleeve 69 slidably connected to the top of the ventilation pipe 3, the outer walls of the two telescopic sleeves 69 are fixedly connected to a pair of side plates 610, the bottoms of the telescopic sleeves 69 are fixedly connected to a return spring 611, the bottoms of the two return springs 611 are fixedly connected to the inner wall of the gas pipeline 1, and the outer wall of the telescopic sleeve 69 is also located between the ring 68 and the ring wing plate 63; The correction plate 62 is T-shaped and the protrusion in the middle is set to be U-shaped; The top of the telescopic sleeve 69 is configured to be in an arc shape; Among them: the U-shaped protrusion in the middle of the correction plate 62 is used for slidingly engaging the orifice plate body 5, the positioning plate 2 is fixedly connected by bolts, the thickness of the annular wing plate 63 is the same as the depth of the annular groove 67, the top of the telescopic sleeve 69 is kept flush with the inner wall of the annular wing plate 63 and the gas pipeline 1, and the four gears 66 are symmetrically arranged.

[0020] The effects achieved by this embodiment are as follows: In the prior art, the orifice plate measurement method is used to measure the pressure difference between the front and rear pores of the orifice plate, and the flow rate and volume flow of the exhaust gas and the combustion air can be calculated. Then, the flow signal is sent to the control system using the differential pressure transmitter 4, thereby achieving precise control of the flow rate. If the orifice plate is deformed or the transmitter fails, it is likely to affect the accuracy of the flow measurement. Compared with the prior art, through the implementation of this embodiment, the auxiliary correction mechanism 6 is set up to achieve a self-maintenance effect for the slightly deformed orifice plate body 5. The two side ring wing plates 63 are connected by a T-shaped correction plate 62, which increases the force bearing area on both sides of the correction plate 62 and effectively reduces the gas impact force received by the raised position in the middle of the correction plate 62, so that the correction plate 62 can maintain a good vertical state, assist in supporting the orifice plate body 5, and always maintain a vertical state when the correction plate 62 rotates and slides on the outer wall of the orifice plate body 5. Under the action of high-speed rotation, the slightly deformed thin-sheet orifice plate body 5 can be auxiliary corrected, thereby extending its service life.

[0021] Further examples: Please refer to Figure 1 , Figure 2 , Figures 8 to 10 As shown, the standby switching mechanism 7 includes a slider 72 slidably connected to the bottom of the ventilation pipe 3, a mounting bracket 73 is slidably connected to the bottom of the slider 72, the mounting bracket 73 is fixedly connected to the top of the differential pressure transmitter 4, and a differential pressure gauge 71 is fixedly connected to the side of the mounting bracket 73 away from the ventilation pipe 3; The standby switching mechanism 7 also includes a pair of fixed tubes 75 fixedly connected to the inner wall of the slider 72, the pair of fixed tubes 75 are both located on the side of the inner wall of the slider 72 away from the differential pressure gauge 71, the upper and lower outer walls of the fixed tubes 75 are slidably sleeved with first sealing sleeves 76, the sides of the two pairs of first sealing sleeves 76 close to each other are fixedly connected with first springs 77, the ends of the two pairs close to each other are fixedly connected to the inner wall of the slider 72, the side of the slider 72 close to the differential pressure gauge 71 is fixedly connected with a pair of sliding tubes 710, the pair of sliding tubes 710 are slidably connected to the middle part of the differential pressure gauge 71, the top of the sliding tubes 710 are slidably sleeved with second sealing sleeves 78, the bottom of the pair of second sealing sleeves 78 are fixedly connected with second springs 79, and the bottom of the second springs 79 are fixedly connected to the inner wall of the slider 72; The standby switching mechanism 7 further includes handles 74 slidably connected to both sides of the slider 72. The two handles 74 are fixedly connected to a pull rope 712 on one side close to the slider 72. The pull rope 712 is fixedly connected to a connecting rod 711 on one end away from the handle 74. Three connecting rods 711 are provided. Two connecting rods 711 are respectively fixedly connected to the outer walls of the upper and lower pairs of first sealing sleeves 76. Another connecting rod 711 is fixedly connected to the outer walls of the two second sealing sleeves 78. The outer walls of the pull rope 712 and the connecting rod 711 are both slidably connected to the inner wall of the slider 72. A plurality of limit baffles are provided on one side of the handle 74 close to the slider 72; Among them: the pull rope 712 close to the first sealing sleeve 76 is located between the two connecting rods 711, the pull rope 712 close to the second sealing sleeve 78 first extends vertically downward, and then bends to connect with the handle 74, the pull rope 712 is used to move the first sealing sleeve 76 and the second sealing sleeve 78 toward the direction of the first spring 77 and the second spring 79 respectively, the sliding distance of the handle 74 is consistent with the moving distance of the first sealing sleeve 76 and the second sealing sleeve 78, and the outer walls of the first sealing sleeve 76 and the second sealing sleeve 78 are both provided with arc ends.

[0022] The effects achieved by this embodiment are as follows: In the prior art, due to the variety of common faults of the differential pressure transmitter 4, maintenance personnel are often required to suspend the equipment, which makes the maintenance time-consuming and has an adverse effect on production efficiency. Compared with the prior art, through the implementation of this embodiment, a spare switching mechanism 7 is set to randomly switch the spare differential pressure gauge 71 to measure the pressure difference value, and the obtained data is compared with the value of the differential pressure transmitter 4. If it exceeds the error range, maintenance personnel are required to troubleshoot the fault to prevent the transmitter from failing and not being able to detect it. In addition, by setting a handle 74 with a limited baffle, the handle 74 can slide a certain distance, and through structural linkage, a simple pulling action can complete the switching of a pair of ventilation pipes 3, and the switching action can be completed during the ventilation process, thereby improving production efficiency.

[0023] The complete usage steps and working principle of the above embodiment are as follows: In the initial state: the extrusion plate 65 is away from the telescopic sleeve 69, the micro motor 61 is in a closed state, the return spring 611, the first spring 77 and the second spring 79 are all in a naturally relaxed state, the slider 72 is close to the differential pressure gauge 71, the ventilation pipe 3 is located at the top of the fixed pipe 75, and the handle 74 is in a retracted state close to the slider 72.

[0024] During use, since a pair of ventilation pipes 3 are located on both sides of the orifice plate body 5, the pressure difference of the pair of ventilation pipes 3 can be measured according to the differential pressure transmitter 4, and then the data can be analyzed through the external control system, and the gas flow in the gas pipeline 1 can be accurately controlled, thereby enhancing the effect of incineration evolution. During the gas introduction process, the faster the flow rate, the greater the pressure difference of the ventilation pipe 3. Often after a period of use, the orifice plate body 5 will produce a slight deformation. The staff can start the micro motor 61 regularly through the external control system, and the micro motor 61 drives the gear 66 connected thereto to rotate, thereby driving the meshing gear ring 64 and the ring wing plate 63 on one side to rotate, and the ring wing plate 63 on one side drives the fixedly connected correction plate 62 to rotate synchronously, and the correction plate 62 is rotated synchronously. The plate 62 drives the annular wing plate 63 on the other side to rotate, thereby causing the gear ring 64 on the other side to rotate, and the remaining three meshed gears 66 are driven to rotate through the two gear rings 64. The four gears 66 not only support the annular wing plate 63 and the correction plate 62 as a whole, but also reduce the friction resistance of the annular wing plate 63 rotating in the annular groove 67, and increase the stability of the rotation of the correction plate 62, so that the correction plate 62 always maintains a state perpendicular to the annular wing plate 63 and slides on the outer wall of the orifice plate body 5. High-speed rotation can assist in correcting the slightly deformed thin-sheet orifice plate body 5, thereby extending the service life of the orifice plate body 5. During the air intake process of the gas pipeline 1, the operation of the micro motor 61 needs to be stopped to avoid disturbing the airflow and affecting the measurement of the differential pressure transmitter 4; Furthermore, since the top of the telescopic sleeve 69 is flush with the annular wing plate 63 and the inner wall of the gas pipeline 1, the telescopic sleeve 69 is equivalent to the air inlet, which can smoothly receive the air pressure difference on both sides of the orifice plate body 5 without being hindered by other structures. Because the operation of the micro motor 61 needs to be stopped during the air intake process of the gas pipeline 1, when the correction plate 62 rotates to complete the correction of the orifice plate body 5, the correction plate 62 may stop just above the vent pipe 3, forming an obstruction, thereby affecting the air pressure value of the vent pipe 3, and at this time, the extrusion plate 65 will squeeze the telescopic sleeve 69 downward and compress the reset spring 611, so the arc at the top of the telescopic sleeve 69 The shaped arrangement, in conjunction with the rebound force of the reset spring 611, can push the extrusion plate 65 toward the side of the telescopic sleeve 69, so that the correction plate 62 automatically produces a small amount of rotational displacement, exposing the vent pipe 3 and the top of the telescopic sleeve 69, so that the vent pipe 3 can normally receive the airflow, thereby ensuring the accuracy of the value of the differential pressure transmitter 4. When the correction plate 62 rotates, each time the extrusion plate 65 passes through the telescopic sleeve 69, the extrusion plate 65 will squeeze the telescopic sleeve 69 and compress the reset spring 611 downward without hindering the rotation of the correction plate 62. The side plate 610 can prevent the telescopic sleeve 69 from deflecting during the telescopic process, thereby increasing the effectiveness of the arc at the top of the telescopic sleeve 69. Please refer to the above working process Figures 1 to 7 .

[0025] Furthermore, the staff can also randomly switch the spare differential pressure gauge 71 to measure the pressure difference value, so as to compare and check whether the data of the differential pressure transmitter 4 is accurate. When switching, the staff first pulls the handle 74 away from the side of the differential pressure gauge 71, pulls the handle 74 out of the slider 72 for a distance, and limits the position through the limit baffle on the handle 74. When the handle 74 moves, the pull rope 712 is simultaneously pulled in the direction away from the first sealing sleeve 76. Since the pull rope 712 is located between the two connecting rods 711, the pull rope 712 can make the two connecting rods 711 move toward The first sealing sleeve 76 on both sides of the upper and lower sides are then driven to move in the direction of the first spring 77 by the connecting rod 711, and the first spring 77 is squeezed. At this time, the staff pulls the handle 74 to simultaneously pull the slider 72 in the direction away from the differential pressure gauge 71, so that the first sealing sleeve 76 is separated from the vent pipe 3, and then the handle 74 is continued to be pulled to drive the slider 72 to move, so that the second sealing sleeve 78 on the slider 72 gradually approaches the vent pipe 3, and the curvature of the outer wall of the second sealing sleeve 78 squeezes the second sealing sleeve 78 to move downward. , the vent pipe 3 continues to move until it fits on the top of the sliding pipe 710 and is connected thereto, at which time the second sealing sleeve 78 is reset by the elastic force of the second spring 79, and the connection between the vent pipe 3 and the sliding pipe 710 is sleeved and sealed to prevent gas leakage, at which time the slider 72 also reaches a position away from the differential pressure gauge 71 from the initial state, completing the switching, and the first sealing sleeve 76 at the bottom of the slider 72 is also switched with the vent pipe 3 at the top of the differential pressure transmitter 4 in the same way, if it needs to be reset, the staff needs to pull the handle 74 close to the side of the differential pressure gauge 71, through the bend The folded pull rope 712 is operated in the same manner as above. First, the second sealing sleeve 78 is pressed down to release the limit of the ventilation pipe 3 and the sliding pipe 710, and then the ventilation pipe 3 is automatically connected to the fixed pipe 75 through the curvature of the outer wall of the first sealing sleeve 76. In this way, the synchronous switching of a pair of ventilation pipes 3 can be ensured. Compared with the prior art of using a control system to adjust two valves, the synchronous switching not only improves the switching speed, but also reduces the maintenance difficulty of the system. Moreover, the simple pull-out switching can be completed during the ventilation process without stopping the equipment for inspection and maintenance, which can effectively improve the production efficiency. Please refer to the above working process Figure 1 , Figure 2 , Figures 8 to 10 .

[0026] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tail gas incineration auxiliary purification device for treating raw coal gas, comprising a gas pipeline (1), characterized in that: A pair of positioning plates (2) are fixedly connected to the outer wall of the gas pipeline (1); a perforated plate body (5) is abutted between the pair of positioning plates (2); the bottoms of the positioning plates (2) are fixedly connected to a ventilation pipe (3); the bottoms of the ventilation pipes (3) are fixedly connected to a differential pressure transmitter (4); Also included are: An auxiliary correction mechanism (6) for assisting in correcting the deformed orifice plate body (5) and self-maintaining the vent pipe (3) to be unobstructed; The standby switching mechanism (7) is used to quickly switch the standby detection device to accurately measure the result.

2. The tail gas incineration auxiliary purification equipment for treating raw coal gas according to claim 1 is characterized in that: The auxiliary correction mechanism (6) comprises a micro motor (61) fixedly connected to the inner wall of the positioning plate (2); the output end of the micro motor (61) is fixedly connected to a gear (66); four gears (66) are provided; the centers of the four gears (66) are rotatably connected to the inner wall of the gas pipeline (1); the outer walls of two gears (66) are meshingly connected to a toothed ring (64); the inner walls of the two toothed rings (64) are fixedly connected to a ring wing plate (63); a ring groove (67) is provided on one side of the gas pipeline (1) close to the orifice plate body (5); the two ring wing plates (63) are slidably connected in the ring groove (67).

3. The tail gas incineration auxiliary purification equipment for treating raw coal gas according to claim 2 is characterized in that: The auxiliary correction mechanism (6) further comprises a correction plate (62) detachably connected to the inner wall of the annular wing plate (63), wherein a plurality of the annular wing plates (63) are provided, and the plurality of correction plates (62) are equidistantly distributed on the side where the two annular wing plates (63) are close to each other, and a pair of circular rings (68) are fixedly connected to the outer wall of the correction plate (62), and the circular rings (68) and the inner wall of the correction plate (62) are both slidably connected to the outer wall of the orifice plate body (5), and extrusion plates (65) are fixedly connected to both sides of the correction plate (62), and the plurality of extrusion plates (65) are slidably connected between the circular rings (68) and the annular wing plates (63).

4. The tail gas incineration auxiliary purification equipment for treating waste gas according to claim 1 is characterized in that: The auxiliary correction mechanism (6) further comprises a telescopic sleeve (69) slidably connected to the top of the ventilation pipe (3), the outer walls of the two telescopic sleeves (69) are fixedly connected to a pair of side plates (610), the bottoms of the telescopic sleeves (69) are fixedly connected to a return spring (611), the bottoms of the two return springs (611) are fixedly connected to the inner wall of the gas pipeline (1), and the outer wall of the telescopic sleeve (69) is also located between the circular ring (68) and the annular wing plate (63).

5. The tail gas incineration auxiliary purification equipment for treating waste gas according to claim 1 is characterized in that: The standby switching mechanism (7) comprises a slider (72) slidably connected to the bottom of the ventilation pipe (3); a mounting frame (73) is slidably connected to the bottom of the slider (72); the mounting frame (73) is fixedly connected to the top of the differential pressure transmitter (4); and a differential pressure gauge (71) is fixedly connected to the side of the mounting frame (73) away from the ventilation pipe (3).

6. The tail gas incineration auxiliary purification equipment for treating raw coal gas according to claim 5, characterized in that: The standby switching mechanism (7) further comprises a pair of fixed tubes (75) fixedly connected to the inner wall of the slider (72); the pair of fixed tubes (75) are both located on the side of the inner wall of the slider (72) away from the differential pressure gauge (71); the upper and lower outer walls of the fixed tubes (75) are both slidably sleeved with first sealing sleeves (76); the sides of the two pairs of first sealing sleeves (76) close to each other are both fixedly connected with first springs (77); the ends of the two pairs of first sealing sleeves close to each other are both fixedly connected to the inner wall of the slider (72); the side of the slider (72) close to the differential pressure gauge (71) is fixedly connected with a pair of sliding tubes (710); the pair of sliding tubes (710) are both slidably connected to the middle part of the differential pressure gauge (71); the tops of the sliding tubes (710) are both slidably sleeved with second sealing sleeves (78); the bottoms of the pair of second sealing sleeves (78) are both fixedly connected with second springs (79); the bottoms of the second springs (79) are both fixedly connected to the inner wall of the slider (72).

7. The tail gas incineration auxiliary purification equipment for treating raw coal gas according to claim 6 is characterized in that: The standby switching mechanism (7) further comprises handles (74) slidably connected to both sides of the slider (72); the two handles (74) are fixedly connected to a pull rope (712) on one side close to the slider (72); the pull rope (712) is fixedly connected to a connecting rod (711) on one end away from the handle (74); three connecting rods (711) are provided; two connecting rods (711) are respectively fixedly connected to the outer walls of the upper and lower pairs of first sealing sleeves (76); another connecting rod (711) is fixedly connected to the outer walls of the two second sealing sleeves (78); and the outer walls of the pull rope (712) and the connecting rod (711) are both slidably connected to the inner wall of the slider (72).

8. The tail gas incineration auxiliary purification equipment for treating waste gas according to claim 7, characterized in that: A plurality of limit baffles are provided on one side of the handle (74) close to the slide block (72).

9. The tail gas incineration auxiliary purification equipment for treating waste gas according to claim 3, characterized in that: The correction plate (62) is T-shaped, and the protrusion in the middle is arranged in a U shape.

10. The tail gas incineration auxiliary purification equipment for treating raw coal gas according to claim 4, characterized in that: The top of the telescopic sleeve (69) is configured to be in an arc shape.

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