Coke oven roof safety water seal
Patent Information
- Application Number
- CN202522163733.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-13
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-13
AI Technical Summary
[0003]在现有技术中，焦炉炉顶安全水封普遍采用循环补水方式实现水封状态，其主要原理是将水不断的补充到水封槽中，而水封槽所溢流出来的水则由铺设在炉顶的退水管道流回至收集池内，再由水泵打到炉顶进行水循环利用，该方式虽然可以让水封槽内的水时刻保持足量，但是需要水泵一直保持运行状态，这样不仅导致电耗量大幅增高，增加水封成本的投入，而水泵在长时间运行状态下还容易发生损坏，导致水封槽内的水无法及时补充足量，导致焦炉炉顶易发生煤气外泄现象，严重时甚至会产生爆炸等安全事故；其次，水封槽的运行过程中，会不断积累焦油、沥青、煤粉等杂质，严重时导致水封失效和煤气泄漏，而人工清理存在费时费力、安全隐患大等问题，还需停车作业，降低了系统的生产效率
[0012]本实用新型用于焦炉炉顶上升管的水封，使用时，开启电磁阀，通过补水管向水封槽内注入一定量的水，随着水位高度的升高，带动浮球上升，同时带动升降杆和支承板上升，直至位于下方的支承板上的压力传感器抵在横板上，压力传感器将信号传至电磁阀，停止注水，此时，水封槽内的水位达到规定范围的最大值，随着焦炉的持续运行，水封槽内的水不断蒸发，水位逐渐降低，浮球、升降杆和支承板随之下降，当位于上方的支承板的压力传感器抵在横板上时，水封槽内的水位达到规定范围的最小值，压力传感器将信号传至电磁阀，开始注水，使得水封槽内的水位达到规定范围内的最大值，停止注水，以此类推，通过上述过程控制水封槽内的水位高度始终在规定范围内，满足水封的使用要求。在本实用新型中，通过两个压力传感器和电磁阀的相互配合，可通过补水管自动向水封槽内及时补充足量的水，可实现水封槽内水量的自动补充，不需工作人员经常检查和巡检，大幅降低了工作人员的工作量，水封槽不易出现缺水、满水外溢的现象，确保水封槽内的水位始终在规定范围内，同时，还避免了目前循环水利用过程中水泵的长期运行，减少了设备的投入成本，降低了电能的消耗，保证水封槽内水量相对稳定的同时，避免了焦炉炉顶发生煤气外泄的问题，进而防止产生爆炸等安全事故，保证了焦炉的安全生产；其次，本实用新型中设置了底部刮板，在使用过程中，可定期开启电机，电机通过倒L形连杆带动底部刮板转动，底部刮板在水封槽内的环形空间内转动，可刮除积累在水封槽内的焦油、沥青、煤粉等杂质，防止杂质粘附在水封槽底部，同时将这些杂质从排污口排出，确保水封效果，防止煤气泄漏，具有较高的清理效率，同时避免人工清理存在的费时费力、安全隐患大等问题，进而实现水封槽内杂质的在线清理，不需停车作业，提高了系统的生产效率。综上所述，本实用新型具有可自动补水，能耗较低，可实现自动清理的优点。
Smart Images
Figure CN224832561U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of safety water seal technology, specifically to a safety water seal for the top of a coke oven. Background Technology
[0002] In coking plants, coal is tamped into briquettes by a tamping machine and then loaded into the carbonization chamber. Under high-temperature, sealed conditions, the briquettes are heated to form coke, while high-temperature coal gas is released. This gas flows through an ascent pipe to a bridge pipe, where it is cooled by circulating ammonia spray before entering a gas collecting pipe. The upper part of the collecting pipe contains coal gas, and the lower part contains a mixture of tar and ammonia. Finally, it is piped to the chemical production workshop for purification. Traditionally, the ascent pipe has a water seal trough with a water seal cover. During operation, water is injected into the water seal trough to seal the coal gas and prevent leakage. Under normal operation, the cover is closed. The cover needs to be opened to clean debris adhering to the ascent pipe, and at the end of the coking process. However, because the temperature in the water seal trough is high, the water in the trough evaporates continuously, requiring frequent water replenishment to ensure the water level can seal the coal gas. This necessitates frequent checks of the water seal level, resulting in a heavy workload and the water seal trough is prone to water shortages and overflows.
[0003] In existing technologies, the safety water seal on the top of coke ovens generally adopts a circulating water replenishment method to achieve the water seal state. The main principle is to continuously replenish water into the water seal trough, while the water overflowing from the water seal trough flows back to the collection pool through the drainage pipe laid on the top of the oven, and is then pumped back to the top of the oven for water recycling. Although this method can keep the water in the water seal trough at all times, it requires the water pump to be running continuously. This not only leads to a significant increase in power consumption and water seal costs, but the water pump is also prone to damage under long-term operation, resulting in insufficient water replenishment in the water seal trough, which can easily cause gas leakage from the top of the coke oven, and in severe cases, even explosions and other safety accidents. Secondly, during the operation of the water seal trough, impurities such as tar, asphalt, and coal dust will continuously accumulate, which can lead to water seal failure and gas leakage in severe cases. Manual cleaning is time-consuming, labor-intensive, and poses significant safety hazards, and requires shutdown operations, reducing the system's production efficiency. Therefore, it is an objective need to develop a coke oven top safety water seal that can automatically replenish water, consume less energy, and achieve automatic cleaning. Utility Model Content
[0004] The purpose of this invention is to provide a coke oven top safety water seal that can automatically replenish water, consumes less energy, and can achieve automatic cleaning.
[0005] The purpose of this utility model is achieved as follows: it includes a riser pipe and a cover plate disposed above the riser pipe. A water seal groove is provided on the riser pipe. The lower end of the cover plate extends into the water seal groove. A horizontal plate is provided on the upper part of the side wall of the water seal groove. A through hole is machined on the horizontal plate. A lifting rod is movably disposed in the through hole. Support plates are provided on the lifting rod above and below the horizontal plate. A pressure sensor is provided on the support plate facing the horizontal plate. A float ball is provided at the lower end of the lifting rod. A water supply pipe is provided on the upper side wall of the water seal groove. A solenoid valve is provided on the water supply pipe. A motor is provided at the center of the lower surface of the cover plate. A bottom scraper is connected to the output shaft of the motor through an inverted L-shaped connecting rod. The lower end of the bottom scraper contacts the bottom of the water seal groove. A drain port is provided at the bottom of the water seal groove.
[0006] Furthermore, a sealed box is provided above and below the horizontal plate, and the support plate and pressure sensor are located in the corresponding sealed box. The lifting rod is movably connected to the sealed box.
[0007] Furthermore, an air outlet is provided at the top of the sealed box above the horizontal plate, and an air inlet is provided at the bottom of the sealed box below the horizontal plate.
[0008] Furthermore, a rectangular opening is machined at the bottom of the water seal tank, with the length of the rectangular opening arranged radially along the bottom of the water seal tank. A drain trough is provided at the bottom of the water seal tank, and the drain trough is connected to the water seal tank through the rectangular opening. A drain pipe is provided at the bottom of the drain trough.
[0009] Furthermore, the bottom of the sewage trough is inclined, and the sewage pipe is located at the lower end of the bottom of the sewage trough.
[0010] Furthermore, a slide is vertically installed on the side wall of the water seal tank, and a slider is installed on the float, with the slider slidingly connected to the slide.
[0011] Furthermore, a side scraper is provided at each end of the bottom scraper, and the two side scrapers contact the outer wall of the riser pipe and the inner wall of the water seal trough, respectively.
[0012] This invention relates to a water seal for the riser pipe at the top of a coke oven. In use, the solenoid valve is opened, and a certain amount of water is injected into the water seal trough through the water supply pipe. As the water level rises, the float rises, simultaneously causing the lifting rod and support plate to rise until the pressure sensor on the lower support plate touches the horizontal plate. The pressure sensor transmits a signal to the solenoid valve, stopping the water injection. At this point, the water level in the water seal trough reaches the maximum value within the specified range. As the coke oven continues to operate, the water in the water seal trough evaporates, and the water level gradually decreases. The float, lifting rod, and support plate then descend. When the pressure sensor on the upper support plate touches the horizontal plate, the water level in the water seal trough reaches the minimum value within the specified range. The pressure sensor transmits a signal to the solenoid valve, starting water injection until the water level in the water seal trough reaches the maximum value within the specified range, at which point water injection stops. This process is repeated to maintain the water level in the water seal trough within the specified range, meeting the requirements for water seal operation. In this invention, through the cooperation of two pressure sensors and a solenoid valve, sufficient water can be automatically replenished to the water seal tank via a water supply pipe. This automatic replenishment of water in the water seal tank eliminates the need for frequent inspections and patrols, significantly reducing the workload of staff. The water seal tank is less prone to water shortages or overflows, ensuring the water level remains within the specified range. Furthermore, it avoids the long-term operation of water pumps in current circulating water systems, reducing equipment investment costs and energy consumption. While ensuring a relatively stable water level in the water seal tank, it also prevents gas leaks from the coke oven roof, thus preventing potential explosions and other safety hazards. The invention ensures safe operation of the coke oven during accidents. Secondly, the bottom scraper, incorporated in this design, allows for periodic motor activation during operation. The motor, via an inverted L-shaped connecting rod, drives the bottom scraper to rotate within the annular space of the water seal trough. This rotation removes accumulated impurities such as tar, asphalt, and coal dust, preventing them from adhering to the bottom of the trough. Simultaneously, these impurities are discharged through the drain outlet, ensuring the water seal effect, preventing gas leakage, and providing high cleaning efficiency. This avoids the time-consuming, labor-intensive, and safety-hazardous problems associated with manual cleaning, enabling online cleaning of impurities within the water seal trough without requiring system shutdown, thus improving system efficiency. In summary, this invention offers the advantages of automatic water replenishment, low energy consumption, and automatic cleaning. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 for Figure 1 A magnified structural diagram of node A in the middle; In the diagram: 1-riser pipe, 2-cover plate, 3-water seal trough, 4-horizontal plate, 5-lifting rod, 6-support plate, 7-pressure sensor, 8-float, 9-water supply pipe, 10-motor, 11-bottom scraper, 12-drain outlet, 13-sealed box, 14-air outlet, 15-air inlet, 16-rectangular opening, 17-drain trough, 18-drain pipe, 19-slide rail, 20-side scraper. Detailed Implementation
[0014] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the present invention shall fall within the protection scope of the present invention.
[0015] like Figures 1-2 As shown, this utility model includes a riser pipe 1 and a cover plate 2 disposed above the riser pipe 1. A water seal groove 3 is provided on the riser pipe 1. The lower end of the cover plate 2 extends into the water seal groove 3. A horizontal plate 4 is provided on the upper part of the side wall of the water seal groove 3. A through hole is machined on the horizontal plate 4, and a lifting rod 5 is movably disposed within the through hole. Support plates 6 are provided on the lifting rod 5 above and below the horizontal plate 4. A pressure sensor 7 is provided on the support plate 6 facing the horizontal plate 4. A float ball 8 is provided at the lower end of the lifting rod 5. A water supply pipe 9 is installed on the upper side wall of the tank 3. A solenoid valve is installed on the water supply pipe 9. The solenoid valve is an existing structure and is used in conjunction with the pressure sensor 7. A motor 10 is installed at the center of the lower surface of the cover plate 2. A bottom scraper 11 is connected to the output shaft of the motor 10 through an inverted L-shaped connecting rod. The lower end of the bottom scraper 11 contacts the bottom of the water seal tank 3. A drain outlet 12 is provided at the bottom of the water seal tank 3. When the concentration of impurities in the water in the water seal tank 3 is high, it can be discharged through the drain outlet 12.
[0016] This invention relates to a water seal for the riser pipe 1 at the top of a coke oven. In use, the solenoid valve is opened, and a certain amount of water is injected into the water seal trough 3 through the water supply pipe 9. As the water level rises, the float 8 rises, simultaneously causing the lifting rod 5 and support plate 6 to rise until the pressure sensor 7 on the lower support plate 6 touches the horizontal plate 4. The pressure sensor 7 transmits a signal to the solenoid valve, stopping the water injection. At this point, the water level in the water seal trough 3 reaches the maximum value within the specified range. As the coke oven continues to operate, the water in the water seal trough 3 evaporates continuously, and the water level gradually decreases. The float 8, lifting rod 5, and support plate 6 then descend. When the pressure sensor 7 on the upper support plate 6 touches the horizontal plate 4, the water level in the water seal trough 3 reaches the minimum value within the specified range. The pressure sensor 7 transmits a signal to the solenoid valve, starting water injection until the water level in the water seal trough 3 reaches the maximum value within the specified range, at which point water injection stops. This process is repeated to control the water level in the water seal trough 3 to remain within the specified range, meeting the requirements for water seal operation.
[0017] In this invention, through the cooperation of two pressure sensors 7 and a solenoid valve, sufficient water can be automatically replenished to the water seal tank 3 via the water supply pipe 9. This automatic replenishment of water in the water seal tank 3 eliminates the need for frequent checks and inspections by personnel, significantly reducing their workload. The water seal tank 3 is less prone to water shortages or overflows, ensuring that the water level remains within the specified range. Furthermore, it avoids the long-term operation of water pumps in current circulating water systems, reducing equipment investment costs and energy consumption. While ensuring a relatively stable water level in the water seal tank 3, it also prevents gas leaks from the top of the coke oven, thus preventing explosions and other safety accidents. This invention ensures safe production of the coke oven. Secondly, the invention includes a bottom scraper 11. During use, the motor 10 can be periodically turned on, and the motor 10 drives the bottom scraper 11 to rotate via an inverted L-shaped connecting rod. The bottom scraper 11 rotates within the annular space of the water seal trough 3, scraping away impurities such as tar, asphalt, and coal powder accumulated in the water seal trough 3, preventing impurities from adhering to the bottom of the water seal trough 3. At the same time, these impurities are discharged from the drain outlet 12, ensuring the water seal effect, preventing gas leakage, and achieving high cleaning efficiency. It also avoids the problems of time-consuming, labor-intensive, and safety hazards associated with manual cleaning, thus realizing online cleaning of impurities in the water seal trough 3 without stopping the operation, thereby improving the system's production efficiency.
[0018] A sealed box 13 is provided above and below the horizontal plate 4. The support plate 6 and the pressure sensor 7 are located in the corresponding sealed box 13. The lifting rod 5 is movably connected to the sealed box 13. Considering that a large amount of dust and coke powder will be generated during the operation of the coke oven, and the dust and coke powder fall onto the pressure sensor 7, the dust has a significant negative impact on the accuracy and long-term reliability of the pressure sensor 7. To avoid this problem, the sealed box 13 is set up to seal the pressure sensor 7 inside the sealed box 13, which plays a role in protecting the pressure sensor 7.
[0019] An air outlet 14 is provided at the top of the sealed box 13 above the horizontal plate 4, and an air inlet 15 is provided at the bottom of the sealed box 13 below the horizontal plate 4. The pressure sensor 7 is located inside the sealed box 13. However, since the sealed box 13 is located close to the riser pipe 1, the gas temperature inside the riser pipe 1 is relatively high, which makes the internal temperature of the sealed box 13 also relatively high. Temperature is one of the most important sources of error for the pressure sensor 7, which will directly affect the accuracy and stability of the measurement. Therefore, the air outlet 14 and the air inlet 15 are provided. During use, cold air can be introduced into the sealed box 13 through the air inlet 15. The cold air first enters the sealed box 13 below the horizontal plate 4, and then enters the sealed box 13 above the horizontal plate 4 through the through hole. During the flow, the heat inside the sealed box 13 is carried away, the temperature inside the sealed box 13 is reduced, and the accuracy and stability of the pressure sensor 7 measurement are improved. The air that has absorbed the heat is discharged from the air outlet 14.
[0020] The bottom of the water seal tank 3 has a rectangular opening 16, the length of which is arranged radially along the bottom of the water seal tank 3. A drain trough 17 is provided at the bottom of the water seal tank 3, and the drain trough 17 is connected to the water seal tank 3 through the rectangular opening 16. A drain pipe 18 is provided at the bottom of the drain trough 17. During operation, some impurities will always be unable to be discharged from the drain outlet 12, affecting the normal use of the water seal. Therefore, the drain trough 17 is provided. When the bottom scraper 11 pushes the sediment and impurities at the bottom of the water seal tank 3 to the position of the rectangular opening 16, all the sediment and impurities will automatically fall into the drain trough 17 through the rectangular opening 16 and then be discharged from the drain pipe 18, thus achieving the purpose of removing all impurities.
[0021] The bottom of the drain trough 17 is inclined, and the drain pipe 18 is located at the lower end of the bottom of the drain trough 17. In actual use, it was found that some sediment and impurities were always in the drain trough 17 and could not be completely discharged. By inclining the bottom of the drain trough 17, all impurities can be discharged cleanly and discharged from the drain pipe 18.
[0022] A slide rail 19 is vertically installed on the side wall of the water seal tank 3, and a slider is installed on the float 8, with the slider slidably connected to the slide rail 19. During use, especially during water replenishment and gas discharge, the water in the water seal tank 3 will flow, causing the float 8 to shake and shift, leading to the tilting and shaking of the lifting rod 5. This may cause jamming or collision between the lifting rod 5 and the through hole of the horizontal plate 4, resulting in a decrease in the sensing accuracy of the pressure sensor 7, or even damage to the pressure sensor 7. Therefore, the slide rail 19 is provided. The float 8 is slidably connected to the slide rail 19 via the slider, which positions and limits the float 8, ensuring that it can only move up and down, preventing the lifting rod 5 and other components from shaking, thus protecting the pressure sensor 7.
[0023] The bottom scraper 11 has a side scraper 20 at each end. The two side scrapers 20 are in contact with the outer wall of the riser pipe 1 and the inner wall of the water seal trough 3, respectively. The bottom scraper 11 is mainly used to scrape off tar, dust and other impurities adhering to the bottom of the water seal trough 3, while the side scrapers 20 can scrape off tar, dust and other impurities adhering to the outer wall of the riser pipe 1 and the inner wall of the water seal trough 3.
Claims
1. A safety water seal for the top of a coke oven, comprising a riser pipe (1) and a cover plate (2) disposed above the riser pipe (1), wherein a water seal groove (3) is provided on the riser pipe (1), and the lower end of the cover plate (2) extends into the water seal groove (3), characterized in that: A horizontal plate (4) is provided on the upper part of the side wall of the water seal trough (3). A through hole is machined on the horizontal plate (4). A lifting rod (5) is movably installed in the through hole. A support plate (6) is provided on the lifting rod (5) above and below the horizontal plate (4). A pressure sensor (7) is provided on the support plate (6) facing the horizontal plate (4). A float ball (8) is provided at the lower end of the lifting rod (5). A water supply pipe (9) is provided on the upper side wall of the water seal trough (3). A solenoid valve is provided on the water supply pipe (9). A motor (10) is provided at the center of the lower surface of the cover plate (2). A bottom scraper (11) is connected to the output shaft of the motor (10) through an inverted L-shaped connecting rod. The lower end of the bottom scraper (11) contacts the bottom of the water seal trough (3). A drain outlet (12) is provided at the bottom of the water seal trough (3).
2. The safety water seal for the top of a coke oven according to claim 1, characterized in that: A sealing box (13) is provided above and below the horizontal plate (4). The support plate (6) and the pressure sensor (7) are located in the corresponding sealing box (13). The lifting rod (5) is movably connected to the sealing box (13).
3. A safety water seal for the top of a coke oven according to claim 2, characterized in that: An air outlet (14) is provided at the top of the sealing box (13) above the horizontal plate (4), and an air inlet (15) is provided at the bottom of the sealing box (13) below the horizontal plate (4).
4. A safety water seal for the top of a coke oven according to claim 1, characterized in that: The bottom of the water seal trough (3) is machined with a rectangular opening (16). The length direction of the rectangular opening (16) is arranged radially along the bottom of the water seal trough (3). A drain trough (17) is provided at the bottom of the water seal trough (3). The drain trough (17) is connected to the water seal trough (3) through the rectangular opening (16). A drain pipe (18) is provided at the bottom of the drain trough (17).
5. A safety water seal for the top of a coke oven according to claim 4, characterized in that: The bottom of the drain trough (17) is inclined, and the drain pipe (18) is located at the lower end of the bottom of the drain trough (17).
6. A safety water seal for the top of a coke oven according to claim 1, characterized in that: A slide (19) is vertically arranged on the side wall of the water seal trough (3), and a slider is provided on the float (8), with the slider slidably connected to the slide (19).
7. A safety water seal for the top of a coke oven according to claim 1, characterized in that: The bottom scraper (11) has a side scraper (20) at each end, and the two side scrapers (20) are in contact with the outer wall of the riser pipe (1) and the inner wall of the water seal groove (3), respectively.