阅读说明：本技术 化产VOCs低氮燃烧用废气收集压力检测装置及其使用方法 (Waste gas collecting pressure detection device for low-nitrogen combustion of chemically-produced VOCs (volatile organic compounds) and use method thereof ) 是由 冯林 彭望 王国能 吴惑 胡旗显 倪乾刚 向前勇 于 2021-09-17 设计创作，主要内容包括：本发明公开了化产VOCs低氮燃烧用废气收集压力检测装置及其使用方法,包括气体收集箱,气体收集箱的内部设有测压机构,气体收集箱的顶部设有顶箱,顶箱的一侧设有调整机构,气体收集箱的一侧设有通气箱,通气箱的内部设有通气机构,通气机构与气体收集箱连接,本发明的有益效果是：通过加入了S型通风管、螺旋通风管,实现了对高温废气进行换热处理,通过加入了通气机构,实现了通气管与通气孔之间的配合,从而对进气量大小的调节处理,通过加入了测压机构,实现了废气压力顶动密封滑板并压动阻尼,阻尼对密封滑板进行复位处理,通过加入了环形斜槽、固定块,实现了移动杆升降的同时进行转动处理,从而实现了锁止棘轮和斜块的锁止处理。(The invention discloses a waste gas collecting pressure detection device for low-nitrogen combustion of chemically-produced VOCs (volatile organic compounds) and a using method thereof, wherein the waste gas collecting pressure detection device comprises a gas collecting box, a pressure measuring mechanism is arranged in the gas collecting box, a top box is arranged at the top of the gas collecting box, an adjusting mechanism is arranged on one side of the top box, a ventilation box is arranged on one side of the gas collecting box, a ventilation mechanism is arranged in the ventilation box, and the ventilation mechanism is connected with the gas collecting box, and the waste gas collecting pressure detection device has the beneficial effects that: through having added S type ventilation pipe, the spiral ventilation pipe, realized carrying out heat transfer treatment to high temperature waste gas, through having added ventilation mechanism, cooperation between ventilation pipe and the air vent has been realized, thereby handle the regulation of air input size, through having added pressure measurement mechanism, exhaust pressure top movive seal slide and pressure damping have been realized, the damping is to sealed slide processing that resets, through having added annular chute, the fixed block, rotate the processing when having realized the carriage release lever lift, thereby the locking of locking ratchet and sloping block is handled.)

1. The waste gas collection pressure detection device for VOCs low-nitrogen combustion comprises a gas collection box (1) and is characterized in that a pressure measuring mechanism (9) is arranged inside the gas collection box (1), a top box (14) is arranged at the top of the gas collection box (1), an adjusting mechanism (8) is arranged on one side of the top box (14), a ventilation box (2) is arranged on one side of the gas collection box (1), a ventilation mechanism (6) is arranged inside the ventilation box (2), the ventilation mechanism (6) is connected with the gas collection box (1), a filter water tank (3) is arranged on one side, away from the gas collection box (1), of the ventilation box (2), the filter water tank (3) is connected with the ventilation box (2) through an air pipe, a heat exchange water tank (22) is arranged on one side, away from the ventilation box (2), of the heat exchange water tank (22) is provided with an S-shaped ventilation pipe (4), the inside of filter tank (3) is equipped with communicating pipe (19), the one end and communicating pipe (19) fixed connection of S type ventilation pipe (4), the inside of filter tank (3) is equipped with and strains miscellaneous water (18) with communicating pipe (19) complex, the outside of S type ventilation pipe (4) is equipped with spiral ventilation pipe (5), and the one end and the S type ventilation pipe (4) of spiral ventilation pipe (5) are connected, one side of heat exchange water tank (22) is equipped with air-supply line (20), spiral ventilation pipe (5) are connected with air-supply line (20).

2. The device for detecting the collecting pressure of the waste gas generated by the low-nitrogen combustion of VOCs according to claim 1, wherein: the ventilation mechanism (6) comprises a ventilation pipe (61), the ventilation pipe (61) is arranged in the ventilation box (2) at the same distance, the ventilation pipe (61) is connected with the gas collection box (1), an adjusting plate (62) is slidably connected to the inside of the ventilation box (2), a ventilation hole (63) matched with the ventilation pipe (61) is formed in the adjusting plate (62), an electric telescopic rod (64) is arranged at the top of the ventilation box (2), and the output end of the electric telescopic rod (64) is fixedly connected with the adjusting plate (62).

3. The device for detecting the collecting pressure of the waste gas generated by the low-nitrogen combustion of VOCs according to claim 1, wherein: pressure measurement mechanism (9) are including sealed slide (91), the inside sliding connection of gas collection box (1) has sealed slide (91), the top symmetry of sealed slide (91) is equipped with damping (92), the one end and the gas collection box (1) of damping (92) are connected, the top of sealed slide (91) is rotated and is connected with carriage release lever (93), and carriage release lever (93) and gas collection box (1) sliding connection, carriage release lever (93) and top case (14) sliding connection, annular chute (94) have been seted up in the outside of carriage release lever (93), the inside of top case (14) is equipped with fixed block (23), and fixed block (23) and annular chute (94) sliding connection.

4. The device for collecting and detecting the pressure of the exhaust gas for low-nitrogen combustion of VOCs produced by chemical production according to claim 3, wherein: the top of the moving rod (93) is fixedly connected with a sliding rod (10), an annular sliding groove (11) is formed in the outer side of the sliding rod (10), a limiting sliding block (12) is connected to the inner portion of the annular sliding groove (11) in a sliding mode, a sliding plate (13) is arranged on one side of the limiting sliding block (12), and the sliding plate (13) is connected with a top box (14) in a sliding mode.

5. The device for collecting and detecting the pressure of the exhaust gas for low-nitrogen combustion of VOCs produced by chemical production according to claim 4, wherein: the outside sliding connection of slide bar (10) has and rotates cover (17), spacing spout (16) have been seted up to the inside symmetry of rotating cover (17), the top of rotating cover (17) be equipped with spacing spout (16) complex limiting plate (15), and limiting plate (15) and spacing spout (16) sliding connection, it rotates with top case (14) to rotate cover (17) and is connected, the inside of top case (14) is equipped with locking mechanism (7).

6. The device for collecting and detecting the pressure of the exhaust gas for low-nitrogen combustion of VOCs produced by chemical production according to claim 4, wherein: adjustment mechanism (8) are including fixed plate (81), one side of top case (14) is equipped with fixed plate (81), the internal thread connection of fixed plate (81) has threaded rod (83), the inside sliding connection of fixed plate (81) has scale (82), the bottom of scale (82) is equipped with connecting plate (85), and threaded rod (83) rotate with connecting plate (85) and be connected, the bottom of connecting plate (85) is equipped with and dabs switch (86) with sliding plate (13) complex, the top of threaded rod (83) is equipped with commentaries on classics piece (84).

7. The device for collecting and detecting the pressure of the exhaust gas for low-nitrogen combustion of VOCs produced by chemical production according to claim 5, wherein: locking mechanism (7) are including fixed case (72), one side of top case (14) is equipped with fixed case (72), the outside of rotating cover (17) is equipped with locking ratchet (71), the inside sliding connection of fixed case (72) has sloping block (75) with locking ratchet (71) complex, one side of sloping block (75) is equipped with pull rod (74), pull rod (74) and fixed case (72) sliding connection, the outside cover of pull rod (74) is equipped with reset spring (73).

8. The device for detecting the collecting pressure of the waste gas generated by the low-nitrogen combustion of VOCs according to claim 1, wherein: the gas collecting box is characterized in that an audible and visual alarm (21) is arranged at the top of the gas collecting box (1), a water inlet pipe is arranged at the top of the heat exchange water tank (22), a water outlet pipe is arranged at the bottom of the heat exchange water tank (22), a water inlet pipe is arranged at the top of the filter water tank (3), a water outlet pipe is arranged at one side of the filter water tank (3), and an exhaust valve is arranged at one side of the gas collecting box (1).

9. The use method of the exhaust gas collection pressure detection device for low-nitrogen combustion of chemically-produced VOCs according to any one of claims 1 to 8, characterized by comprising the following steps:

s1, connecting a pipeline for collecting waste gas with an air inlet pipe (20), enabling air in the air inlet pipe (20) to enter an S-shaped ventilation pipe (4) and then enter a spiral ventilation pipe (5), injecting water into a heat exchange water tank (22), heating water in the heat exchange water tank (22) by waste gas circulating in the S-shaped ventilation pipe (4) and the spiral ventilation pipe (5), enabling waste gas in the spiral ventilation pipe (5) to enter impurity filtering water (18) through a communicating pipe (19), filtering the waste gas by the impurity filtering water (18), and enabling the filtered waste gas to enter a ventilation tank (2);

s2, starting an electric telescopic rod (64), aligning the electric telescopic rod (64) with a vent pipe (61) through a vent hole (63) in an adjusting plate (62), adjusting the proper air outlet size, and carrying out air transmission treatment in a gas collection box (1), wherein a sealing sliding plate (91) is pressed by air pressure in the gas collection box (1) to move upwards and press a damper (92), and the sealing sliding plate (91) drives a moving rod (93) to move upwards;

s3, by rotating the threaded rod (83), the threaded rod (83) is in threaded connection with the fixed plate (81), the threaded rod (83) drives the connecting plate (85) to adjust the height, the connecting plate (85) drives the light touch switch (86) to adjust the position, the height is observed through the graduated scale (82), the required proper air pressure is achieved, the moving rod (93) moves upwards, the annular chute (94) is matched with the fixed block (23), the moving rod (93) moving upwards rotates through the force of the fixed block (23), the fixed block (23) slides through the annular chute (94), the moving rod (93) rotates, the moving rod (93) drives the sliding rod (10) to rotate while moving upwards, the sliding plate (13) moves upwards, when the sliding plate (13) touches the light touch switch (86), the acousto-optic alarm (21) gives an alarm, and air transmission is stopped;

s4, slide bar (10) drive limiting plate (15) and rotate, limiting plate (15) drive through spacing spout (16) and rotate cover (17), it rotates to rotate cover (17) and drive locking ratchet (71), pivoted direction locking ratchet (71) rotate and can press sloping block (75) during the rebound, sloping block (75) take place the displacement and compress tightly reset spring (73), when inside atmospheric pressure of gas collection box (1) is lower, damping (92) reset, sloping block (75) can carry out the locking processing to rotating cover (17) through locking ratchet (71), pulling pull rod (74), pull rod (74) drive sloping block (75) leave the fixed to locking ratchet (71), damping (92) reset this moment.

Technical Field

The invention relates to the technical field of low-nitrogen combustion of chemically produced VOCs (volatile organic compounds), in particular to a waste gas collecting pressure detection device for low-nitrogen combustion of chemically produced VOCs and a using method thereof.

Background

The chemical product workshop is the subsidiary workshop of coking, refine the deep-processing to the raw coke oven gas that the coking workshop comes out, VOCs volatile organic compounds, it is greater than 70Pa to indicate saturated vapor pressure under the normal temperature, the boiling point is the organic compound below 260 ℃ under the ordinary pressure, in the low nitrogen burning of current chemical product VOCs, need unify the collection processing to the waste gas of production, but the low nitrogen burning waste gas of current chemical product VOCs is not convenient for carry out the heat transfer to high temperature waste gas when collecting, be not convenient for carry out preliminary treatment to the waste gas of collecting when waste gas is collected, the collection efficiency has been influenced.

Disclosure of Invention

The invention aims to provide a waste gas collecting pressure detection device for low-nitrogen combustion of chemically-produced VOCs and a using method thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the waste gas collecting pressure detection device for low-nitrogen combustion of VOCs (volatile organic chemicals) comprises a gas collection box, wherein a pressure measuring mechanism is arranged inside the gas collection box, a top box is arranged at the top of the gas collection box, an adjusting mechanism is arranged on one side of the top box, a ventilation box is arranged on one side of the gas collection box, a ventilation mechanism is arranged inside the ventilation box and is connected with the gas collection box, a filter water tank is arranged on one side, away from the gas collection box, of the ventilation box, the filter water tank is connected with the ventilation box through a wind pipe, a heat exchange water tank is arranged on one side, away from the ventilation box, of the filter water tank, an S-shaped ventilation pipe is arranged inside the heat exchange water tank, a communication pipe is arranged inside the filter water tank, one end of the S-shaped ventilation pipe is fixedly connected with the communication pipe, impurity filtering water matched with the communication pipe is arranged inside the filter water tank, and a spiral ventilation pipe is arranged outside the S-shaped ventilation pipe, and one end of the spiral ventilating pipe is connected with the S-shaped ventilating pipe, an air inlet pipe is arranged on one side of the heat exchange water tank, and the spiral ventilating pipe is connected with the air inlet pipe.

As a preferred embodiment of the present invention: the ventilation mechanism comprises ventilation pipes, the ventilation pipes are arranged in the ventilation box at equal intervals and connected with the gas collecting box, an adjusting plate is connected in the ventilation box in a sliding mode, ventilation holes matched with the ventilation pipes are formed in the adjusting plate, an electric telescopic rod is arranged at the top of the ventilation box, and the output end of the electric telescopic rod is fixedly connected with the adjusting plate.

As a preferred embodiment of the present invention: the pressure measuring mechanism comprises a sealing sliding plate, the inside of the gas collecting box is connected with the sealing sliding plate in a sliding mode, the top of the sealing sliding plate is symmetrically provided with damping, one end of the damping is connected with the gas collecting box, the top of the sealing sliding plate is rotatably connected with a moving rod, the moving rod is connected with the gas collecting box in a sliding mode, the moving rod is connected with the top box in a sliding mode, an annular chute is formed in the outer side of the moving rod, a fixing block is arranged inside the top box, and the fixing block is connected with the annular chute in a sliding mode.

As a preferred embodiment of the present invention: the top of the moving rod is fixedly connected with a sliding rod, an annular sliding groove is formed in the outer side of the sliding rod, a limiting sliding block is connected inside the annular sliding groove in a sliding mode, a sliding plate is arranged on one side of the limiting sliding block, and the sliding plate is connected with the top box in a sliding mode.

As a preferred embodiment of the present invention: the outside sliding connection of slide bar has the rotating sleeve, the inside symmetry of rotating sleeve has seted up spacing spout, the top of rotating sleeve be equipped with spacing spout complex limiting plate, and limiting plate and spacing spout sliding connection, the rotating sleeve rotates with the top case to be connected, the inside of top case is equipped with locking mechanism.

As a preferred embodiment of the present invention: the adjusting mechanism comprises a fixed plate, a fixed plate is arranged on one side of the top box, a threaded rod is connected to the inner thread of the fixed plate, a graduated scale is connected to the inner portion of the fixed plate in a sliding mode, a connecting plate is arranged at the bottom of the graduated scale, the threaded rod is connected with the connecting plate in a rotating mode, a touch switch matched with the sliding plate is arranged at the bottom of the connecting plate, and a rotating block is arranged at the top of the threaded rod.

As a preferred embodiment of the present invention: the locking mechanism comprises a fixed box, one side of the top box is provided with the fixed box, the outer side of the rotating sleeve is provided with a locking ratchet wheel, the inner portion of the fixed box is connected with an inclined block matched with the locking ratchet wheel in a sliding mode, one side of the inclined block is provided with a pull rod, the pull rod is connected with the fixed box in a sliding mode, and the outer side of the pull rod is sleeved with a reset spring.

As a preferred embodiment of the present invention: the gas collecting box is characterized in that an audible and visual alarm is arranged at the top of the gas collecting box, a first water inlet pipe is arranged at the top of the heat exchange water tank, a first water discharge pipe is arranged at the bottom of the heat exchange water tank, a second water inlet pipe is arranged at the top of the filter water tank, a second water discharge pipe is arranged on one side of the filter water tank, and an exhaust valve is arranged on one side of the gas collecting box.

The use method of the waste gas collecting pressure detection device for the low-nitrogen combustion of the produced VOCs comprises the following steps:

s1, connecting a pipeline for collecting waste gas with an air inlet pipe, enabling air in the air inlet pipe to enter an S-shaped vent pipe and then enter a spiral vent pipe, injecting water into a heat exchange water tank, heating water in the heat exchange water tank by the S-shaped vent pipe and waste gas circulating in the spiral vent pipe, enabling the waste gas in the spiral vent pipe to enter impurity filtering water through a communicating pipe, filtering the waste gas by the impurity filtering water, and enabling the filtered waste gas to enter a vent box;

s2, starting the electric telescopic rod, adjusting the proper air outlet size of the electric telescopic rod by aligning the air vent and the vent pipe in the adjusting plate, conveying air into the gas collecting box for treatment, pressing the sealing sliding plate to move upwards and pressing the damper by air pressure in the gas collecting box, and driving the moving rod to move upwards by the sealing sliding plate;

s3, by rotating the threaded rod, the threaded rod is in threaded connection with the fixed plate, the threaded rod drives the connecting plate to adjust the height, the connecting plate drives the tact switch to adjust the position, the height is observed through the graduated scale, the desired appropriate air pressure is achieved, the movable rod moves upwards, the annular chute is matched with the fixed block, the movable rod moving upwards passes through the force of the fixed block, the fixed block slides through the annular chute, the movable rod rotates, the movable rod drives the sliding rod to rotate while moving upwards, the sliding plate moves upwards, when the sliding plate touches the tact switch, the audible and visual alarm gives an alarm and stops air transmission;

s4, the slide bar drives the limiting plate to rotate, the limiting plate drives the rotating sleeve to rotate through the limiting sliding groove, the rotating sleeve drives the locking ratchet to rotate, the inclined block can be pressed through rotation of the rotating direction locking ratchet during upward movement, the inclined block displaces and compresses a reset spring, when the air pressure inside the gas collection box is low, damping resets, the inclined block can lock the rotating sleeve through the locking ratchet, the pull rod is pulled, the pull rod drives the inclined block to leave the fixing of the locking ratchet, and the damping resets at the moment.

Compared with the prior art, the invention has the beneficial effects that: the invention has simple structure, novelty and strong practicability, realizes the heat exchange treatment of high-temperature waste gas by adding the S-shaped ventilation pipe and the spiral ventilation pipe, realizes the matching between the ventilation pipe and the ventilation hole by adding the ventilation mechanism, thereby realizing the adjustment treatment of the air input quantity, realizes the exhaust gas pressure pushing the sealing sliding plate and pressing the damping by adding the pressure measuring mechanism, resets the sealing sliding plate by the damping, realizes the rotation treatment while the movable rod is lifted by adding the annular chute and the fixed block, thereby realizing the locking treatment of the locking ratchet wheel and the inclined block, better observing the internal pressure, and realizes the alarm treatment by pressing the tact switch after the displacement of the sliding plate by adding the tact switch.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 2 according to the present invention;

FIG. 4 is an enlarged view of the invention at B of FIG. 2;

fig. 5 is a top view of the locking mechanism of the present invention.

In the figure: 1. a gas collection box; 2. a ventilation box; 3. a filtering water tank; 4. an S-shaped ventilation pipe; 5. a helical ventilation pipe; 6. a venting mechanism; 61. a breather pipe; 62. an adjusting plate; 63. a vent hole; 64. an electric telescopic rod; 7. a locking mechanism; 71. locking the ratchet wheel; 72. a fixed box; 73. a return spring; 74. a pull rod; 75. a sloping block; 8. an adjustment mechanism; 81. a fixing plate; 82. a graduated scale; 83. a threaded rod; 84. rotating the block; 85. a connecting plate; 86. a tact switch; 9. a pressure measuring mechanism; 91. sealing the sliding plate; 92. damping; 93. a travel bar; 94. an annular chute; 10. a slide bar; 11. an annular chute; 12. a limiting slide block; 13. a sliding plate; 14. a top box; 15. a limiting plate; 16. a limiting chute; 17. rotating the sleeve; 18. filtering the impurity water; 19. a communicating pipe; 20. an air inlet pipe; 21. an audible and visual alarm; 22. a heat exchange water tank; 23. and (5) fixing blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: the waste gas collecting pressure detection device for VOCs low-nitrogen combustion comprises a gas collection box 1, a pressure measuring mechanism 9 is arranged inside the gas collection box 1, a top box 14 is arranged at the top of the gas collection box 1, an adjusting mechanism 8 is arranged on one side of the top box 14, a ventilation box 2 is arranged on one side of the gas collection box 1, an air ventilation mechanism 6 is arranged inside the ventilation box 2, the air ventilation mechanism 6 is connected with the gas collection box 1, a filter water tank 3 is arranged on one side, away from the gas collection box 1, of the ventilation box 2, the filter water tank 3 is connected with the ventilation box 2 through an air pipe, a heat exchange water tank 22 is arranged on one side, away from the ventilation box 2, of the filter water tank 3, an S-shaped ventilation pipe 4 is arranged inside the heat exchange water tank 22, a communicating pipe 19 is arranged inside the filter water tank 3, one end of the S-shaped ventilation pipe 4 is fixedly connected with the communicating pipe 19, impurity filtering water 18 matched with the communicating pipe 19 is arranged inside the filter water tank 3, and a spiral ventilation pipe 5 is arranged outside the S-shaped ventilation pipe 4, and one end of the spiral ventilation pipe 5 is connected with the S-shaped ventilation pipe 4, one side of the heat exchange water tank 22 is provided with the air inlet pipe 20, and the spiral ventilation pipe 5 is connected with the air inlet pipe 20, so that the S-shaped ventilation pipe 4 and the spiral ventilation pipe 5 can conveniently carry out heat exchange treatment on cold water in the heat exchange water tank 22, and the waste gas treatment efficiency is improved.

The ventilation mechanism 6 comprises a ventilation pipe 61, the ventilation pipe 61 is equidistantly arranged inside the ventilation box 2, the ventilation pipe 61 is connected with the gas collection box 1, the inside of the ventilation box 2 is slidably connected with an adjusting plate 62, the inside of the adjusting plate 62 is provided with a ventilation hole 63 matched with the ventilation pipe 61, the top of the ventilation box 2 is provided with an electric telescopic rod 64, the output end of the electric telescopic rod 64 is fixedly connected with the adjusting plate 62, the electric telescopic rod 64 is convenient for driving the ventilation hole 63 inside the adjusting plate 62 to carry out position adjustment treatment, the ventilation hole 63 and the ventilation pipe 61 carry out position adjustment treatment, the adjustment efficiency of the air volume is improved, the pressure measuring mechanism 9 comprises a sealing sliding plate 91, the inside of the gas collection box 1 is slidably connected with the sealing sliding plate 91, the top of the sealing sliding plate 91 is symmetrically provided with a damper 92, one end of the damper 92 is connected with the gas collection box 1, the top of the sealing sliding plate 91 is rotatably connected with a moving rod 93, the movable rod 93 is connected with the gas collecting box 1 in a sliding manner, the movable rod 93 is connected with the top box 14 in a sliding manner, an annular chute 94 is formed in the outer side of the movable rod 93, a fixed block 23 is arranged in the top box 14, the fixed block 23 is connected with the annular chute 94 in a sliding manner, so that when the movable rod 93 moves up and down, the annular chute 94 formed in the outer side of the movable rod 93 drives the movable rod 93 to rotate when moving up and down through the fixed block 23, the top of the movable rod 93 is fixedly connected with a sliding rod 10, an annular chute 11 is formed in the outer side of the sliding rod 10, a limit slider 12 is connected with the inner side of the annular chute 11 in a sliding manner, a sliding plate 13 is arranged on one side of the limit slider 12, the sliding plate 13 is connected with the top box 14 in a sliding manner, so that the limit slider 12 slides in the annular chute 11, the limit slider 12 drives the sliding plate 13 to lift, and a rotating sleeve 17 is connected with the outer side of the sliding rod 10 in a sliding manner, the inside of the rotating sleeve 17 is symmetrically provided with limiting sliding grooves 16, the top of the rotating sleeve 17 is provided with a limiting plate 15 matched with the limiting sliding grooves 16, the limiting plate 15 is connected with the limiting sliding grooves 16 in a sliding manner, so that the sliding rod 10 can drive the limiting plate 15 to rotate, the limiting plate 15 drives the rotating sleeve 17 through the limiting sliding grooves 16 to perform rotating treatment, the rotating sleeve 17 is connected with the top box 14 in a rotating manner, the inside of the top box 14 is provided with a locking mechanism 7, an adjusting mechanism 8 comprises a fixed plate 81, one side of the top box 14 is provided with a fixed plate 81, the inside of the fixed plate 81 is in threaded connection with a threaded rod 83, the inside of the fixed plate 81 is in sliding connection with a graduated scale 82, the bottom of the graduated scale 82 is provided with a connecting plate 85, the threaded rod 83 is in rotating connection with the connecting plate 85, the bottom of the connecting plate 85 is provided with a tact switch 86 matched with the sliding plate 13, the top of the threaded rod 83 is provided with a rotating block 84, so that the threaded rod 83 can rotate and drive the connecting plate 85 to perform lifting treatment, the connecting plate 85 drives the tact switch 86 to adjust the position, the locking mechanism 7 comprises a fixed box 72, one side of the top box 14 is provided with the fixed box 72, the outer side of the rotating sleeve 17 is provided with a locking ratchet 71, the inner part of the fixed box 72 is slidably connected with an inclined block 75 matched with the locking ratchet 71, one side of the inclined block 75 is provided with a pull rod 74, the pull rod 74 is slidably connected with the fixed box 72, the outer side of the pull rod 74 is sleeved with a reset spring 73, the inclined block 75 is convenient to perform anti-reversion treatment on the locking ratchet 71, the stability efficiency is improved, the top of the gas collecting box 1 is provided with the audible and visual alarm 21, the audible and visual alarm 21 is convenient to perform alarm treatment when the air pressure value reaches, the safety is improved, the top of the heat exchange water tank 22 is provided with a first water inlet pipe, the bottom of the heat exchange water tank 22 is provided with a first water outlet pipe, the top of the filter water tank 3 is provided with a second water inlet pipe, one side of the filter water tank 3 is provided with a second water outlet pipe, one side of the gas collecting box 1 is provided with an exhaust valve.

The use method of the waste gas collecting pressure detection device for the low-nitrogen combustion of the produced VOCs comprises the following steps:

s1, connecting a pipeline for collecting waste gas with an air inlet pipe 20, enabling air in the air inlet pipe 20 to enter an S-shaped ventilation pipe 4 and then enter a spiral ventilation pipe 5, injecting water into a heat exchange water tank 22, heating water in the heat exchange water tank 22 by the waste gas circulating in the S-shaped ventilation pipe 4 and the spiral ventilation pipe 5, enabling the waste gas in the spiral ventilation pipe 5 to enter impurity filtering water 18 through a communicating pipe 19, filtering the waste gas by the impurity filtering water 18, and enabling the filtered waste gas to enter a ventilation tank 2;

s2, starting the electric telescopic rod 64, aligning the electric telescopic rod 64 with the vent pipe 61 through the vent hole 63 in the adjusting plate 62, adjusting the proper air outlet size, and carrying out air transmission treatment in the gas collection box 1, wherein the air pressure in the gas collection box 1 presses the sealing sliding plate 91 to move upwards and tightly presses the damper 92, and the sealing sliding plate 91 drives the moving rod 93 to move upwards;

s3, by rotating the threaded rod 83, the threaded rod 83 is in threaded connection with the fixed plate 81, the threaded rod 83 drives the connecting plate 85 to adjust the height, the connecting plate 85 drives the light touch switch 86 to adjust the position, the height is observed through the scale 82, the desired proper air pressure is achieved, the moving rod 93 moves upwards, the annular chute 94 is matched with the fixed block 23, the moving rod 93 moving upwards is under the force of the fixed block 23, the fixed block 23 slides through the annular chute 94, the moving rod 93 rotates, the moving rod 93 drives the sliding rod 10 to rotate while moving upwards, the sliding plate 13 moves upwards, and when the sliding plate 13 touches the light touch switch 86, the audible and visual alarm 21 gives an alarm to stop air transmission;

s4, the slide rod 10 drives the limit plate 15 to rotate, the limit plate 15 drives the rotating sleeve 17 to rotate through the limit sliding chute 16, the rotating sleeve 17 drives the locking ratchet wheel 71 to rotate, the rotating direction locking ratchet wheel 71 rotates to press the inclined block 75 when moving upwards, the inclined block 75 displaces and compresses the reset spring 73, when the air pressure in the gas collection box 1 is low, the damper 92 resets, the inclined block 75 can lock the rotating sleeve 17 through the locking ratchet wheel 71, the pull rod 74 is pulled, the pull rod 74 drives the inclined block 75 to leave the fixing of the locking ratchet wheel 71, and at the moment, the damper 92 resets.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.