Coke oven chamber pressure regulating valve and coke oven chamber pressure regulating method

Abstract

This invention discloses a pressure regulating valve and a method for regulating the pressure of a coke oven carbonization chamber. The valve includes a single-adjustment regulating valve comprising: a shell with a through-hole channel running vertically through it, one end of which is connected to the output port of a bridge pipe, and the other end of which is equipped with a water seal valve; a valve plate with a rotating shaft on one side, the valve plate being rotatably disposed within the channel, the rotating shaft being used to control the opening and closing degree of the valve plate; and an adjusting component including an adjusting gear and a driving component. The adjusting gear is sleeved on the rotating shaft to drive the rotating shaft to rotate. The adjusting gear has a first locking tooth and a second locking tooth arranged around its center, the number of teeth in the first locking tooth being greater than the number of teeth in the second locking tooth. The driving component includes a driving gear, the driving gear meshing with the first locking tooth and the second locking tooth respectively.

Description

Technical Field

[0001] This invention relates to the field of coke oven production technology, and in particular to a pressure regulating valve for the coke oven carbonization chamber and a method for regulating the pressure of the coke oven carbonization chamber. Background Technology

[0002] The raw coal gas produced in coke oven production is typically discharged through a three-section gas collecting pipe, a horizontal pipe, and a negative pressure pipe. The gas is then drawn into the gas purification process by the suction force generated by a gas blower. The conventional coke oven gas collecting pipe positive pressure regulation process is controlled by a regulating valve installed between the horizontal pipe and the suction pipe. However, this method cannot achieve a uniform and stable pressure at the bottom of each carbonization chamber throughout the entire coking cycle. This fixed-pressure regulation of raw coal gas discharge leads to a high raw coal gas generation rate and greater resistance to discharge during coal charging and the initial coking stage. Excessive pressure at the bottom of the carbonization chamber easily causes unorganized leakage of raw coal gas from various locations, including the charging hole, furnace walls, furnace doors, and furnace body, resulting in air pollution. Conversely, at the end of the coking stage, the raw coal gas generation rate is low, and a negative pressure easily forms at the bottom of the carbonization chamber, allowing air to be drawn in, causing coke burn-off and furnace damage.

[0003] If conventional valves are to meet the coal charging conditions, the valve diameter must be increased. This reduces the small-scale adjustment performance at the end of coking, or even prevents it from being adjusted at all. As a result, a long-term negative pressure will appear at the bottom of the carbonization chamber at the end of coking, which is very harmful to coke oven production and coke oven life. If conventional valves are to meet the small-scale adjustment performance at the end of coking, the valve diameter must be reduced, such as the coke oven carbonization chamber raw gas pressure regulating device disclosed in patent CN216273933U. As a result, it is impossible to meet the requirements of smooth exhaust of smoke and dust under coal charging conditions, resulting in fugitive emission of smoke and dust and environmental pollution. Summary of the Invention

[0004] The main objective of this invention is to provide a pressure regulating valve and a method for regulating the pressure of a coke oven carbonization chamber, aiming to solve the technical problems in the prior art where the resistance to coal charging and the discharge of raw coal gas in the early stage of coking is large, and the amount of raw coal gas generated in the late stage of coking is small, and negative pressure is easily formed at the bottom of the carbonization chamber.

[0005] To achieve the above objectives, the present invention provides a pressure regulating valve for a coke oven carbonization chamber, comprising a monotonic regulating valve disposed between a bridge pipe and a water seal valve, wherein the monotonic regulating valve comprises:

[0006] The outer casing has a through-hole channel running vertically inside. One end of the channel is connected to the output port of the bridge tube, and the other end is equipped with a water seal valve.

[0007] A valve plate has a rotating shaft on one side, and the valve plate is rotatably disposed in the channel. The rotating shaft is used to control the opening and closing degree of the valve plate.

[0008] The adjustment assembly includes an adjustment gear and a drive component. The adjustment gear is sleeved on a rotating shaft to drive the rotating shaft to rotate. The adjustment gear has a first locking tooth and a second locking tooth arranged around its center. The number of teeth in the first locking tooth is greater than the number of teeth in the second locking tooth. The drive component includes a drive gear, which meshes with the first locking tooth and the second locking tooth.

[0009] Furthermore, the driving component also includes a power component, a rotating rod, and a bushing. The bushing is sleeved on the rotating rod and slidably connected to it. The driving gear includes a first gear and a second gear mounted on the bushing. The first gear and the second gear mesh with a first clasp and a second clasp, respectively. The first gear and the second gear do not mesh with the first clasp and the second clasp simultaneously. A protrusion is provided at one end of the bushing near the rotating shaft. An annular protrusion is provided on the rotating shaft. The annular protrusion is used to abut against the protrusion to push the bushing to slide, thereby causing the second gear and the second clasp to separate. At the same time, the first gear meshes with a first caliper. A return spring is provided between the bushing and the rotating rod. The return spring is used to push the bushing to move closer to the rotating shaft. The power component drives the rotating rod to rotate.

[0010] The transmission ratio of the first gear and the first locking tooth is less than the transmission ratio of the second gear and the second locking tooth.

[0011] Furthermore, there are two annular protrusions, which are symmetrically arranged along the rotation axis.

[0012] Furthermore, the rotating rod is provided with a slide rail in the circumferential direction, and the bushing is provided with a slide groove at the position of the slide rail, and the slide groove and the slide rail are slidably engaged.

[0013] Furthermore, mounting boxes are provided on both sides of the outer casing, one end of the rotating shaft extends into the mounting box on one side, and the adjustment component is located in the corresponding mounting box.

[0014] Furthermore, the mounting box is equipped with an overflow pipe, one end of which is connected to the channel above the valve plate, and the other end is connected to the channel below the valve plate.

[0015] 7. A method for regulating the pressure in a coke oven carbonization chamber, comprising the following steps:

[0016] S1. Install a pressure detection instrument at the bridge pipe or riser pipe, and electrically connect the pressure detection instrument and the monotonic regulating valve to the coke oven carbonization chamber pressure regulating system respectively.

[0017] S2. During coal charging, the coke oven carbonization chamber pressure regulating system controls the monotonic regulating valve to be fully open.

[0018] S3. In the coking process, a preset pressure range is set. The coke oven carbonization chamber pressure regulation system adjusts the opening and closing degree of the monotonic regulating valve according to the actual pressure value measured by the pressure detection instrument so that the measured pressure value is within the preset pressure range.

[0019] S4. During the coke pushing operation, the coke oven carbonization chamber pressure regulation system controls the monotonic regulating valve and water seal valve to be in the closed state. The low-pressure and high-low pressure ammonia water nozzles spray ammonia water to form a water seal, which isolates the raw coal gas outlet channel from the bridge pipe to the gas collecting pipe.

[0020] The beneficial effects of this invention are as follows: Compared with the prior art, in the coal loading process, due to the sufficiently large channel design, the resistance of raw coal gas passing through the channel is reduced, the operating pressure of the gas collecting pipe is reduced, and it is more conducive to the smooth discharge of smoke and dust during coal loading, thus achieving smokeless coal loading.

[0021] In the early and middle stages of coking, the amount of raw coal gas produced is still relatively large. At this time, the drive gear meshes with the second clasp gear to adjust the valve plate in the "large adjustment range". This allows the coal gas to be smoothly discharged and also keeps the pressure in the carbonization chamber in a slightly positive state through adjustment.

[0022] During the final stage of coking, the amount of raw coal gas generated is relatively small. At this time, the drive gear meshes with the first locking tooth, adjusting the valve plate within the "small adjustment range" to keep the pressure in the carbonization chamber at a slightly positive pressure, preventing negative pressure from appearing at the bottom of the carbonization chamber. This invention places the monotonic regulating valve between the bridge pipe and the water seal valve, retaining the water seal valve. When replacing coke oven production equipment later, the water seal valve can be used to isolate the operation, providing convenience for maintenance. The unique design concept of this invention can meet the needs of both coal charging and coking conditions in coke oven production, making it highly economical and practical. Attached Figure Description

[0023] Figure 1 This is a diagram showing the raw coal gas outlet of the pressure regulating valve in the coke oven carbonization chamber of the present invention.

[0024] Figure 2 This is a perspective view of the pressure regulating valve in the coke oven carbonization chamber of the present invention.

[0025] Figure 3 This is a diagram of the valve plate of the pressure regulating valve for the coke oven carbonization chamber of the present invention.

[0026] Figure 4 for Figure 3 Enlarged view of point A;

[0027] Figure 5 This is a front view of the valve plate of the pressure regulating valve in the coke oven carbonization chamber of the present invention.

[0028] Figure 6 This is a diagram of the regulating component of the pressure regulating valve for the coke oven carbonization chamber of the present invention.

[0029] Figure 7This is a cross-sectional view of the pressure regulating valve in the coke oven carbonization chamber of the present invention.

[0030] Explanation of reference numerals in the attached drawings: 1. Monotonic regulating valve; 2. Regulating component; 11. Housing; 12. Channel; 13. Valve plate; 14. Rotating shaft; 15. Mounting box; 21. Regulating gear; 22. Drive component; 23. Drive gear; 151. Overflow pipe; 152. Overflow port; 211. First locking tooth; 212. Second locking tooth; 221. Power component; 222. Rotating rod; 223. Bushing; 224. First gear; 225. Second gear; 141. Annular protrusion; 227. Return spring; 2221. Slide rail. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Furthermore, if the embodiments of the present invention involve descriptions such as "first" or "second", such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0033] See Figures 1 to 7 .

[0034] This invention relates to a pressure regulating valve for a coke oven carbonization chamber, involving a bridge pipe and a water seal valve, including a monotonic regulating valve 1 disposed between the bridge pipe and the water seal valve, the monotonic regulating valve 1 comprising:

[0035] The outer casing 11 has an internal channel 12 that runs vertically through it. One end of the channel 12 is connected to the output port of the bridge pipe, and the other end is equipped with a water seal valve.

[0036] The valve plate 13 has a rotating shaft 14 on one side. The valve plate 13 is rotatably disposed in the channel 12. The rotating shaft 14 is used to control the opening and closing degree of the valve plate 13.

[0037] Adjustment component 2 includes an adjustment gear 21 and a drive component 22. The adjustment gear 21 is sleeved on the rotating shaft 14 to drive the rotating shaft 14 to rotate. The adjustment gear 21 has a first locking tooth 211 and a second locking tooth 212 arranged around its center. The number of teeth on the first locking tooth 211 is greater than the number of teeth on the second locking tooth 212. The drive component 22 includes a drive gear 23, which meshes with the first locking tooth 211 and the second locking tooth 212. With this design, in the coal charging process, because the channel 12 is designed to be large enough, the resistance of raw coal gas passing through the channel 12 is reduced, the operating pressure of the gas collecting pipe is reduced, and it is more conducive to the smooth discharge of smoke and dust during coal charging, thus achieving smokeless coal charging.

[0038] In the early and middle stages of coking, the amount of raw coal gas produced is still relatively large. At this time, the drive gear 23 meshes with the second clasp 212 and adjusts the valve plate 13 in the "large adjustment range". This allows the coal gas to be smoothly discharged and keeps the carbonization chamber pressure in a slightly positive state through adjustment.

[0039] At the end of the coking process, the amount of raw coal gas generated is relatively small. At this time, the drive gear 23 meshes with the first locking tooth 211 and adjusts the valve plate 13 in the "small adjustment range" so that the pressure in the carbonization chamber is always in a slightly positive pressure state and there is no negative pressure at the bottom of the carbonization chamber.

[0040] In one embodiment, the driving component 22 further includes a power component 221, a rotating rod 222, and a bushing 223. The bushing 223 is sleeved on the rotating rod 222 and slidably connected to the rotating rod 222. The driving gear 23 includes a first gear 224 and a second gear 225 disposed on the bushing 223. The first gear 224 and the second gear 225 respectively mesh with a first locking tooth 211 and a second locking tooth 212. The first gear 224 and the second gear 225 do not mesh with the first locking tooth 211 and the second locking tooth 212 simultaneously. The bushing 223 has a protrusion at one end near the rotating shaft 14, and the rotating shaft 14 has an annular protrusion 141. The annular protrusion 141 is used to abut against the protrusion to push the bushing 223 to slide, thereby driving the second gear 225 and the second clasp 212 to separate, while the first gear 224 meshes with the first caliper. A return spring 227 is provided between the bushing 223 and the rotating rod 222. The return spring 227 is used to push the bushing 223 to move towards the rotating shaft 14. The power unit 221 drives the rotating rod 222 to rotate.

[0041] The transmission ratio of the first gear 224 and the first locking tooth 211 is less than the transmission ratio of the second gear 225 and the second locking tooth 212.

[0042] In specific implementation, the opening angle of valve plate 13 within 10° is set as the "small adjustment range". When the device is not started, the second gear 225 and the second locking tooth 212 are in a meshing state. During the coal charging stage, the second gear 225 is driven to rotate 90° clockwise until valve plate 13 is fully open. In the early stage of coking, the second gear 225 and the second locking tooth 212 are still in a meshing state, and the second gear 225 continues to rotate clockwise to adjust the opening and closing degree of valve plate 13 in the "large adjustment range". In the late stage of coking, the second gear 225... When the valve plate 13 rotates to 170°, the annular protrusion 141 abuts against the protrusion and pushes the bushing 223 to slide, thereby causing the second gear 225 and the second locking tooth 212 to separate. At the same time, the first gear 224 meshes with the first caliper. At this time, the first gear 224 adjusts the opening and closing degree of the valve plate 13 in the "small adjustment amount" range. When the valve plate 13 is fully closed, the annular protrusion 141 separates from the protrusion, the return spring 227 resets the bushing 223, and the second gear 225 meshes with the second locking tooth 212, completing one cycle. Preferably, the arc length of the annular protrusion 141 is equal to the arc length corresponding to a 10° opening angle of the valve plate 13.

[0043] With this design, since the transmission ratio of the first gear 224 and the first locking tooth 211 is smaller than that of the second gear 225 and the second locking tooth 212, when the second gear 225 and the second locking tooth 212 mesh, when the power component 221 drives the rotating rod 222 to rotate, the second gear 225 drives the second locking tooth 212 to rotate at a larger angle when the rotating rod 222 rotates by the same angle, which is suitable for adjustment in the "large adjustment range"; the first gear 224 drives the first locking tooth 211 to rotate at a smaller angle, which is suitable for adjustment in the "small adjustment range".

[0044] In one embodiment, there are two annular protrusions 141, which are symmetrically arranged along the rotation axis 14. This design ensures that the valve plate 13 can cycle in the order of fully open - large adjustment - small adjustment - fully closed each time it rotates 180° clockwise or counterclockwise. The position of the annular protrusions 141 corresponds to the rotation direction of the rotation axis 14, ensuring that the annular protrusions 141 only abut against the protrusions during the "small adjustment".

[0045] In one embodiment, the rotating rod 222 is provided with a circumferential slide rail 2221, and the bushing 223 is provided with a groove at the corresponding position of the slide rail 2221, with the groove and the slide rail 2221 slidingly engaged. This design, through the engagement of the groove and the slide rail 2221, allows the bushing 223 to both rotate with the rotating rod 222 and slide on the rotating rod 222, resulting in a simple structure.

[0046] In one embodiment, mounting boxes 15 are provided on both sides of the outer casing 11, and one end of the rotating shaft 14 extends into the mounting box 15 on one side, with the adjustment component 2 located in the corresponding mounting box 15. This design mounts the adjustment component 2 on the side of the outer casing 11, preventing damage to the adjustment component 2 from the high temperature generated by the raw coal gas.

[0047] In one embodiment, the mounting box 15 is provided with an overflow pipe 151. One end of the overflow pipe 151 is connected to the channel 12 above the valve plate 13, and the other end is connected to the channel 12 below the valve plate 13. With this design, when the monotonic regulating valve 1 is fully closed at the end of the coking process, the ammonia water nozzle above the bridge pipe sprays ammonia water to form a water seal. Since the pressure in the carbonization chamber is low at this time, ammonia water backflow may occur. In order to prevent ammonia water backflow into the carbonization chamber, an overflow pipe 151 is provided above the valve plate 13. At the same time, an overflow port 152 is provided on the side of the overflow pipe 151. The overflow port 152 is higher than the bottom of the overflow pipe 151 to prevent raw coal gas from being discharged from the overflow pipe. When backflow occurs, ammonia water will overflow from the overflow pipe 151 into the gas collecting pipe, avoiding a production safety accident caused by ammonia water "backflow" into the carbonization chamber.

[0048] A method for regulating the pressure of a coke oven carbonization chamber, comprising a coke oven carbonization chamber pressure regulation system, a riser pipe, a gas collecting pipe, and low-pressure and high-low-pressure ammonia water nozzles, wherein the specific implementation steps are as follows:

[0049] S1. Install a pressure detection instrument at the bridge pipe or riser pipe, and electrically connect the pressure detection instrument and the monotonic regulating valve 1 to the coke oven carbonization chamber pressure regulating system respectively.

[0050] S2. During the coal charging process, the coke oven carbonization chamber pressure regulating system controls the monotonic regulating valve 1 to be fully open.

[0051] S3. In the coking process, a preset pressure range is set. The coke oven carbonization chamber pressure regulation system adjusts the opening and closing degree of the monotonic regulating valve 1 according to the actual pressure value measured by the pressure detection instrument so that the measured pressure value is within the preset pressure range.

[0052] S4. During the coke pushing operation, the coke oven carbonization chamber pressure regulation system controls the monotonic regulating valve 1 and the water seal valve to be in the closed state. The low-pressure and high-low pressure ammonia water nozzles spray ammonia water to form a water seal, which isolates the raw coal gas outlet channel from the bridge pipe to the gas collecting pipe.

[0053] In specific implementation, the monotonic regulating valve 1 is electrically connected to the coke oven carbonization chamber pressure regulating system of the coke oven car. During the coal charging operation, the coke oven carbonization chamber pressure regulating system controls the monotonic regulating valve 1 to the "fully open" position. Since the channel 12 inside the monotonic regulating valve 1 is large enough, the resistance of the raw coal gas through the channel 12 is reduced, the operating pressure of the gas collecting pipe is reduced, and it is more conducive to the smooth discharge of smoke and dust during coal charging, so as to achieve smokeless coal charging.

[0054] In the coking process of a coke oven, during the initial stage of coking, the pressure setpoint for the entire coking period is divided into several segments. The pressure is adjusted within the "large adjustment range" based on the actual pressure value measured by the pressure detection instrument. This allows the gas to be smoothly discharged and keeps the pressure in the carbonization chamber at a slightly positive pressure state, ensuring that the furnace door does not emit flames or smoke, the raw gas does not overflow from the furnace door, thus preventing environmental pollution and improving the raw gas recovery rate.

[0055] In the late stage of coking, the amount of raw coal gas generated is relatively small. In order to ensure that the pressure in the carbonization chamber is always in a slightly positive pressure state, the pressure is adjusted in the "small adjustment range" according to the pressure value measured by the pressure detection instrument. This ensures that there is no negative pressure at the bottom of the carbonization chamber, avoids coke burn-out, and extends the service life of the coke oven and iron parts.

[0056] During the coke oven pushing operation, the coke oven carbonization chamber pressure regulation system controls the monotonic regulating valve 1 to the "closed" position, and at the same time, the water seal valve is also in the "closed" position. The low-pressure and high-low pressure ammonia water nozzles spray ammonia water to form a water seal, which completely isolates the bridge pipe from the gas collecting pipe, preventing crosstalk between carbonization chambers during coke oven production and preventing air from being sucked into the gas collecting pipe, thus ensuring the safety of coke oven and subsequent processes.

[0057] This invention patent features a unique design concept that includes an overflow pipe, allowing ammonia water to flow smoothly into the gas collecting pipe, preventing ammonia water from "backflowing" into the bridge pipe and carbonization chamber, which could lead to production safety accidents. The valve patent also features a unique design concept that retains a water seal valve between the regulating valve and the gas collecting pipe. This water seal valve can be used to isolate the ammonia water during future replacements of coke oven production equipment, facilitating maintenance.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pressure regulating valve for a coke oven carbonization chamber, involving a bridge pipe and a water seal valve, characterized in that, Includes a monotonic regulating valve (1) disposed between the bridge pipe and the water seal valve, the monotonic regulating valve (1) comprising: The outer shell (11) has a through channel (12) running vertically inside. One end of the channel (12) is connected to the output port of the bridge pipe, and the other end is equipped with a water seal valve. A valve plate (13) is provided with a rotating shaft (14) on one side. The valve plate (13) is rotatably disposed in the channel (12). The rotating shaft (14) is used to control the opening and closing degree of the valve plate (13). The adjustment component (2) includes an adjustment gear (21) and a drive component (22). The adjustment gear (21) is sleeved on the rotating shaft (14) to drive the rotating shaft (14) to rotate. The adjustment gear (21) is provided with a first locking tooth (211) and a second locking tooth (212) around the center. The number of teeth of the first locking tooth (211) is greater than the number of teeth of the second locking tooth (212). The drive component (22) includes a drive gear (23). The drive gear (23) meshes with the first locking tooth (211) and the second locking tooth (212) respectively. The driving component (22) further includes a power component (221), a rotating rod (222), and a bushing (223). The bushing (223) is sleeved on the rotating rod (222) and slidably connected to the rotating rod (222). The driving gear (23) includes a first gear (224) and a second gear (225) disposed on the bushing (223). The first gear (224) and the second gear (225) respectively mesh with a first locking tooth (211) and a second locking tooth (212). The first gear (224) and the second gear (225) do not mesh with the first locking tooth (211) and the second locking tooth (212) simultaneously. The bushing ( 223) A protrusion (226) is provided at one end near the rotating shaft (14), and an annular protrusion (141) is provided on the rotating shaft (14). The annular protrusion (141) is used to abut against the protrusion (226) to push the bushing (223) to slide, thereby driving the second gear (225) and the second caliper (212) to separate. At the same time, the first gear (224) meshes with the first caliper. A return spring (227) is provided between the bushing (223) and the rotating rod (222). The return spring (227) is used to push the bushing (223) to move towards the rotating shaft (14). The power component (221) drives the rotating rod (222) to rotate. The transmission ratio of the first gear (224) and the first locking tooth (211) is less than the transmission ratio of the second gear (225) and the second locking tooth (212).

2. The coke oven carbonization chamber pressure regulating valve as described in claim 1, wherein there are two annular protrusions (141), and the two annular protrusions (141) are symmetrically arranged along the rotation axis (14).

3. The coke oven carbonization chamber pressure regulating valve as described in claim 1, wherein the rotating rod (222) is provided with a slide rail (2221) in a circumferential direction, and the bushing (223) is provided with a slide groove at the position of the corresponding slide rail (2221), and the slide groove and the slide rail (2221) are in sliding cooperation.

4. The coke oven carbonization chamber pressure regulating valve as described in claim 1, wherein the outer shell (11) is provided with mounting boxes (15) on both sides, one end of the rotating shaft (14) extends into the mounting box (15) on one side, and the regulating component (2) is located in the corresponding mounting box (15).

5. The coke oven carbonization chamber pressure regulating valve as described in claim 4, wherein the mounting box (15) is provided with an overflow pipe (151), one end of the overflow pipe (151) is connected to the channel (12) above the valve plate (13), and the other end is connected to the channel (12) below the valve plate (13).

6. A method for regulating the pressure of a coke oven carbonization chamber, comprising a coke oven carbonization chamber pressure regulation system, a riser pipe, a gas collecting pipe, and low-pressure and high-low-pressure ammonia water nozzles, characterized in that, Using the coke oven carbonization chamber pressure regulating valve as described in any one of claims 1 to 5 includes the following steps: S1. Install a pressure detection instrument at the bridge pipe or riser pipe, and electrically connect the pressure detection instrument and the monotonic regulating valve (1) to the coke oven carbonization chamber pressure regulating system respectively. S2. During the coal charging process, the coke oven carbonization chamber pressure regulation system controls the monotonic regulating valve (1) to be fully open. S3. In the coking process, a preset pressure range is set. The coke oven carbonization chamber pressure regulation system adjusts the opening and closing degree of the monotonic regulating valve (1) according to the actual pressure value measured by the pressure detection instrument so that the measured pressure value is within the preset pressure range. S4. In the coke pushing operation, the coke oven carbonization chamber pressure regulation system controls the monotonic regulating valve (1) and water seal valve to be in the closed state. The low-pressure and high-low pressure ammonia water nozzles spray ammonia water to form a water seal, which isolates the bridge pipe to the gas collection pipe raw coal gas outlet channel.

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