Graded control dry quenching humidification system and graded humidification method

Abstract

The invention belongs to the technical field of dry quenching humidification, and particularly relates to a grading control dry quenching humidification system and a grading humidification method. Comprising a belt conveyor, a material guide groove and a material distribution trolley are installed on the belt conveyor, a plurality of coke bins are arranged below the material distribution trolley, a water diversion ditch is arranged below the belt conveyor and the coke bins, the water diversion ditch is communicated with a sedimentation tank, a submerged pump is installed in the sedimentation tank, the submerged pump is communicated with a main water pipe through an upper water pipe, and the main water pipe is communicated with a pressure pump and a gas-water separator. The gas-water separator is communicated with a plurality of main spray heads through a main water spray pipe penetrating through the material guide groove, a steam absorption cover is communicated above the material guide groove, an exhaust fan is mounted on the steam absorption cover, and the exhaust fan is connected with the gas-water separator through a steam absorption pipe. The coke humidifying step is carried out after the vibrating screen, only metallurgical coke is humidified, and the problems that due to the fact that moisture is increased in coke foam and coke particles, screening is difficult, and the coke foam and the coke particles contain water are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of dry coke quenching humidification, and in particular relates to a graded controlled dry coke quenching humidification system and a graded humidification method. Background Art

[0002] The coke produced by the coking plant needs to be humidified according to customer requirements. After the existing dry quenching coke oven comes out of the oven, the dry quenching coke is watered, dusted, and steam is recycled through a special coke humidification bin and a fan dust removal system. However, since the humidification is performed on the whole coke, a large amount of coke foam will adhere to the belt during the coke transportation process, which brings a lot of coke foam cleaning work to the entire belt transportation corridor. After reaching the vibrating screen, the whole coke that has been added with water requires the vibrating screen to have a larger aperture than the dry quenching coke, otherwise it is easy to get blocked, which is easy to cause screening quality accidents, and the coke foam adheres to the vibrating screen holes, which brings a lot of work to clean the vibrating screen holes. Summary of the invention

[0003] The object of the present invention is to provide a hierarchically controlled dry coke quenching humidification system and a hierarchical humidification method to solve the problems existing in the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A hierarchically controlled dry coke quenching humidification system comprises a belt conveyor, a material guide trough and a material distribution trolley are installed on the belt conveyor, a plurality of coke bins are arranged below the material distribution trolley, a water diversion ditch is arranged below the belt conveyor and the coke bins, the water diversion ditch is connected to a sedimentation tank, a submersible pump is installed in the sedimentation tank, the submersible pump is connected to a main water pipe through an upper water pipe, a pressure pump and an air-water separator are connected to the main water pipe, the air-water separator is connected to a plurality of main nozzles through a main water spray pipe penetrating the material guide trough, a suction steam hood is connected above the material guide trough, an exhaust fan is installed on the suction steam hood, the exhaust fan is connected to the air-water separator through a suction steam pipe, the air-water separator is connected to the sedimentation tank through a drain pipe, a plurality of auxiliary nozzles are installed on both sides of the material distribution trolley, and the plurality of auxiliary nozzles are sequentially connected to a water pump and a water storage tank through auxiliary water pipes.

[0006] Furthermore, the material guide trough is provided with an upper cover, the suction steam hood is connected to the material guide trough through the upper cover, and the exhaust fan is located on the top of the suction steam hood.

[0007] Furthermore, two partitions are provided in the sedimentation tank, and the heights of the two partitions are lower than the height of the sedimentation tank. The two partitions divide the sedimentation tank into a first sedimentation chamber, a second sedimentation chamber, and a third sedimentation chamber. The first sedimentation chamber is close to the connection between the sedimentation tank and the water diversion ditch, the third sedimentation chamber is far away from the connection between the sedimentation tank and the water diversion ditch, and the second sedimentation chamber is located between the first sedimentation chamber and the third sedimentation chamber.

[0008] Furthermore, the submersible pump is located in the third sedimentation chamber, and a filter and a water supply valve are installed on the water supply pipe from bottom to top in sequence. The water supply pipe is connected to the main water pipe after the water supply valve is installed. The main water pipe is installed with a main water valve. The main water pipe is connected to the water supply pipe after the main water valve is installed. After the main water pipe is connected to the water supply pipe, it is connected to the booster pump and the gas-water separator in sequence.

[0009] Furthermore, a jacket is welded on the outer wall of the gas-water separator, the main water pipe is connected to the water inlet end of the jacket, the main water spray pipe is connected to the water outlet end of the jacket, a number of branch pipes are welded on the main water spray pipe, the branch pipes pass through and are welded to the side of the material guide trough, a number of main nozzles are installed on the branch pipes located inside the material guide trough, the main water spray pipe passes through the material guide trough through the branch pipes, and the main nozzles are installed on the main water spray pipe through the branch pipes.

[0010] Furthermore, the steam absorption pipe is connected to the steam inlet end of the gas-water separator, the drain pipe is connected to the drain end of the gas-water separator, and the end of the drain pipe is located in the third sedimentation chamber of the sedimentation tank.

[0011] Furthermore, the material distribution trolley has a Y-shaped discharge hopper with inclined surfaces on both sides of the discharge hopper. T-shaped auxiliary water spray pipes are penetrated and welded on the inclined surfaces on both sides of the discharge hopper. Several auxiliary nozzles are installed on the auxiliary water spray pipes located inside the discharge hopper. The two auxiliary water spray pipes are connected to the water supply valve on the outside of the discharge hopper. The two water supply valves have hoses, and the two hoses are connected to the auxiliary water pipes. The auxiliary water pipes are connected to the auxiliary nozzles through the hoses, auxiliary water spray pipes, and water supply valves.

[0012] A hierarchical humidification method for a hierarchically controlled coke dry quenching humidification system comprises the following steps:

[0013] (1) Primary water replenishment: Turn on the water pump and water replenishment valve. After water replenishment, the moisture content of the coke is 1-2%;

[0014] (2) Secondary water replenishment: Open the main water valve, do not start the booster pump, and the water content of the coke after water replenishment is 2-3%;

[0015] (3) Level 3 water replenishment: Turn on the water pump, water replenishment valve, and main water valve at the same time, but do not turn on the booster pump. After water replenishment, the moisture content of the coke is 3-4%;

[0016] (4) Level 4 water replenishment: Open the main water valve and the pressure pump. After water replenishment, the moisture content of the coke is 4-5%;

[0017] (5) Level 5 water replenishment: Turn on the water pump and water replenishment valve, and at the same time turn on the main water valve and booster pump. After water replenishment, the water content of the coke is 5-6%;

[0018] (6) Water recovery: The water leaking from the belt conveyor and coke bin is clarified through the diversion ditch and sedimentation tank and then used to replenish the coke. When the water in the sedimentation tank is used to replenish the coke, the submersible pump and the water supply valve are opened. The replenishment effect is the same as that of opening the main water valve.

[0019] The present invention has the following beneficial effects:

[0020] 1. The coke humidification step of the present invention is arranged after the vibrating screen, and only the metallurgical coke is humidified, thereby avoiding the increase of moisture in the coke foam and coke particles, causing screening difficulties and the problem of water content in the coke foam and coke particles.

[0021] 2. The present invention has two water replenishment points, namely the guide groove and the material distributing trolley, and water replenishment can be performed in stages according to needs.

[0022] 3. When the main nozzle in the guide groove is humidified and watered, the coke is cooled, hydrated and dusted, thus avoiding dust pollution.

[0023] 4. The present invention recovers water leaking from the coke bin and the belt conveyor and water vapor generated by coke humidification, thereby reducing water consumption.

[0024] 5. After the recycled water has been precipitated in the sedimentation tank, there are still fine impurity particles precipitated at the bottom of the third sedimentation chamber. After the air is separated by the gas-water separator, the condensed water is discharged into the third sedimentation chamber to prevent the water vapor and air mixture from being directly discharged into the third sedimentation chamber to disturb the impurity particles at the bottom.

[0025] 6. By adding a jacket to the gas-water separator, the water in the main water pipe is used to cool the water vapor, thereby accelerating the condensation of the water vapor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the connection structure of the gas-water separator of the present invention.

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the material guide trough and the steam absorption hood of the present invention.

[0029] Figure 4 It is a schematic diagram of the main nozzle structure distribution of the present invention.

[0030] Figure 5 It is a schematic diagram of the structural distribution of the auxiliary nozzles of the present invention.

[0031] Figure 6 This is a schematic diagram of the auxiliary water spray pipe structure of the present invention.

[0032] Among them: 1. belt conveyor; 2. material guide trough; 3. material distribution trolley; 4. coke bin; 5. water diversion ditch; 6. sedimentation tank; 7. submersible pump; 8. water supply pipe; 9. main water pipe; 10. booster pump; 11. gas-water separator; 12. main water spray pipe; 13. main nozzle; 14. steam suction hood; 15. exhaust fan; 16. steam suction pipe; 17. drainage pipe; 18. auxiliary nozzle; 19. auxiliary water pipe; 20. water pump; 21. water storage tank; 22. upper cover; 23. partition; 24. first sedimentation chamber; 25. second sedimentation chamber; 26. third sedimentation chamber; 27. filter; 28. water supply valve; 29. ​​main water valve; 30. jacket; 31. branch pipe; 32. discharge hopper; 33. auxiliary water spray pipe; 34. hose; 35. water supply valve. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] Embodiment 1:

[0035] like Figure 1-6 As shown, a hierarchically controlled dry coke quenching humidification system comprises a belt conveyor 1, a material guide trough 2 and a material distribution trolley 3 are installed on the belt conveyor 1, a plurality of coke bins 4 are arranged below the material distribution trolley 3, a water diversion ditch 5 is arranged below the belt conveyor 1 and the coke bins 4, the water diversion ditch 5 is connected to a sedimentation tank 6, a submersible pump 7 is installed in the sedimentation tank 6, the submersible pump 7 is connected to a main water pipe 9 through a water supply pipe 8, a booster pump 10 and a gas-water separator 11 are connected to the main water pipe 9, and the gas-water separator 11 A plurality of main nozzles 13 are connected through a main water spray pipe 12 that runs through the material guide trough 2. A suction hood 14 is connected above the material guide trough 2. An exhaust fan 15 is installed on the suction hood 14. The exhaust fan 15 is connected to an air-water separator 11 through an air-water pipe 16. The air-water separator 11 is connected to a sedimentation tank 6 through a drain pipe 17. A plurality of auxiliary nozzles 18 are installed on both sides of the material distribution trolley 3. The plurality of auxiliary nozzles 18 are connected to a water pump 20 and a water storage tank 21 in sequence through auxiliary water pipes 19.

[0036] The guide trough 2 is provided with an upper cover 22, the suction hood 14 is connected to the guide trough 2 through the upper cover 22, and the exhaust fan 15 is located on the top of the suction hood 14. By arranging the upper cover 22 on the guide trough 2, water vapor is collected, and then the water vapor is sucked to the gas-water separator 11 by the exhaust fan 15.

[0037] Two partitions 23 are provided in the sedimentation tank 6. The heights of the two partitions 23 are lower than the height of the sedimentation tank 6. The two partitions 23 divide the sedimentation tank 6 into a first sedimentation chamber 24, a second sedimentation chamber 25, and a third sedimentation chamber 26. The first sedimentation chamber 24 is close to the connection between the sedimentation tank 6 and the water diversion ditch 5, the third sedimentation chamber 26 is far away from the connection between the sedimentation tank 6 and the water diversion ditch 5, and the second sedimentation chamber 25 is located between the first sedimentation chamber 24 and the third sedimentation chamber 26. The partitions 23 are used to grade the sedimentation and recovery of water so that the sedimented water overflows step by step.

[0038] The submersible pump 7 is located in the third sedimentation chamber 26. A filter 27 and a water supply valve 28 are installed on the water supply pipe 8 from bottom to top. After the water supply valve 28 is installed on the water supply pipe 8, it is connected to the main water pipe 9. A main water valve 29 is installed on the main water pipe 9. After the main water valve 29 is installed, the main water pipe 9 is connected to the water supply pipe 8. After the main water pipe 9 is connected to the water supply pipe 8, it is connected to the booster pump 10 and the gas-water separator 11 in sequence.

[0039] A jacket 30 is welded on the outer wall of the gas-water separator 11, the main water pipe 9 is connected to the water inlet end of the jacket 30, the main water spray pipe 12 is connected to the water outlet end of the jacket 30, a plurality of branch pipes 31 are welded on the main water spray pipe 12, the branch pipes 31 penetrate and are welded to the side of the guide trough 2, a plurality of main nozzles 13 are installed on the branch pipes 31 located inside the guide trough 2, the main water spray pipe 12 penetrates the guide trough 2 through the branch pipes 31, and the main nozzles 13 are installed on the main water spray pipe 12 through the branch pipes 31. The water vapor is separated from the gas-water separator 11, and the water temperature in the main water pipe 9 is low. After entering the jacket 30, the water vapor is cooled down, thereby accelerating the condensation of the water vapor.

[0040] The steam absorption pipe 16 is connected to the steam inlet end of the gas-water separator 11, and the drain pipe 17 is connected to the drain end of the gas-water separator 11. The end of the drain pipe 17 is located in the third sedimentation chamber 26 of the sedimentation tank 6. Since the impurity content of water vapor is small, it can be directly discharged into the third sedimentation chamber 26.

[0041] The material distribution trolley 3 has a Y-shaped discharge hopper 32, and the discharge hopper 32 has inclined surfaces on both sides. T-shaped auxiliary water spray pipes 33 are penetrated and welded on the inclined surfaces on both sides of the discharge hopper 32. A number of auxiliary nozzles 18 are installed on the auxiliary water spray pipes 33 located inside the discharge hopper 32. The two auxiliary water spray pipes 33 are connected to the water supply valve 35 outside the discharge hopper 32. The two water supply valves 35 have hoses 34. The two hoses 34 are connected to the auxiliary water pipe 19. The auxiliary water pipe 19 is connected to the auxiliary nozzle 18 through the hose 34, the auxiliary water spray pipe 33, and the water supply valve 35.

[0042] Embodiment 2: This embodiment provides a hierarchical humidification method for a hierarchically controlled dry coke quenching humidification system, and this embodiment is implemented based on Embodiment 1.

[0043] A hierarchical humidification method for a hierarchically controlled coke dry quenching humidification system comprises the following steps:

[0044] (1) Primary water replenishment: Turn on the water pump 20 and the water replenishment valve 35. The water in the water storage tank 21 is sprayed out through the auxiliary water pipe 19, the hose 34, the auxiliary water spray pipe 33, and the auxiliary nozzle 18 to replenish the coke falling in the discharge hopper 32. After the water replenishment, the water content of the coke is 1-2%.

[0045] (2) Secondary water replenishment: The main water pipe 9 is connected to the industrial water network in the factory. After the main water valve 29 is opened, the industrial water is sprayed onto the coke on the belt conveyor 1 through the main water pipe 9, the gas-water separator 11, the main water spray pipe 12, and the main nozzle 13. The booster pump 10 is not turned on, and only the water pressure of the industrial water network is relied on. After replenishment, the moisture content of the coke is 2-3%.

[0046] (3) Three-stage water replenishment: Turn on the water pump 20, the water replenishment valve 35, and the main water valve 29 at the same time, and do not turn on the booster pump 10. After water replenishment, the water content of the coke is 3-4%. Since water replenishment is performed twice in the guide trough and the material distribution trolley 3, the water content of the coke is improved.

[0047] (4) Level 4 water replenishment: Open the main water valve 29 and the booster pump 10. After water replenishment, the moisture content of the coke is 4-5%. The water pressure is increased by the booster pump 10, thereby increasing the amount of water replenishment.

[0048] (5) Five-stage water replenishment: Turn on the water pump 20 and the water replenishment valve 35, and at the same time turn on the main water valve 29 and the pressure pump 10. After water replenishment, the moisture content of the coke is 5-6%. Water is replenished in the guide groove under pressure and in the distribution trolley 3, thereby increasing the moisture content of the coke.

[0049] (6) Water recovery: The water leaked from the conveyor belt 1 and the coke bin 4 is clarified by the diversion ditch 5 and the sedimentation tank 6 and then used to replenish the water of the coke. When the water in the sedimentation tank 6 is used to replenish the water of the coke, the submersible pump 7 and the water supply valve 28 are opened, and the replenishment effect is the same as the replenishment effect of opening the main water valve 29. That is, when the water in the sedimentation tank 6 is full, the submersible pump 7 and the water supply valve 28 are opened instead of opening the main water valve 29, and the recycled water is used to replenish the water of the coke.

[0050] The working principle of the present invention is:

[0051] After the dry quenching coke oven comes out, the coke is first screened by a vibrating screen to filter out the coke foam and enter the belt conveyor 1. At this time, the coke temperature is above 100°C. When the main nozzle 13 in the guide groove is humidified and replenished with water, the coke is cooled, replenished with water, and dusted, and a large amount of water vapor is generated. After the guide groove is equipped with an upper cover 22, a steam hood 14, and an exhaust fan 15, the water vapor is drawn into the gas-water separator 11 for gas-water separation, and the air is discharged from the gas outlet end of the gas-water separator 11. The condensed water is recovered from the drain pipe 17 to the sedimentation tank 6, thereby recovering the water vapor and avoiding dust pollution. The main water pipe 9 is connected to the industrial water network. When the main water valve 29 is opened, the industrial water enters the jacket 30 of the gas-water separator 11, cools the water vapor in the gas-water separator 11, and accelerates the condensation of the water vapor.

[0052] When the coke is transported to the distribution trolley 3, the distribution trolley 3 moves above the belt conveyor 1 and transports the coke on the belt conveyor 1 from the discharge hopper 32 to the designated coke bin 4. When the coke falls in the discharge hopper 32, the water pump 20 and the water supply valve 35 are turned on to replenish water and humidify the coke. The water leaked from the coke bin 4 and the belt conveyor 1 is collected in the water diversion ditch 5 and then flows to the sedimentation tank 6. Due to the large number of particulate impurities in the water, after the large impurities are precipitated in the first sedimentation chamber 24, it overflows to the second sedimentation chamber 25 to continue to precipitate small impurities, and finally the clarified water overflows to the third sedimentation chamber 26. When the water in the third sedimentation chamber 26 is full, the submersible pump 7 and the water supply valve 28 are turned on instead of the main water valve 29, so that the recovered water is used to replenish water for the coke.

[0053] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should all fall within the scope of protection of the present invention.

[0054] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A hierarchically controlled dry coke quenching humidification system, comprising a belt conveyor, on which a material guide trough and a material distribution trolley are installed, and a plurality of coke bins are arranged below the material distribution trolley, characterized in that: A water diversion ditch is provided below the belt conveyor and the coke bin, the water diversion ditch is connected to a sedimentation tank, a submersible pump is installed in the sedimentation tank, the submersible pump is connected to a main water pipe through an upper water pipe, the main water pipe is connected to a pressure pump and an air-water separator, the air-water separator is connected to a plurality of main nozzles through a main water spray pipe that runs through the material guide trough, a suction steam hood is connected above the material guide trough, an exhaust fan is installed on the suction steam hood, the exhaust fan is connected to the air-water separator through a suction steam pipe, the air-water separator is connected to the sedimentation tank through a drain pipe, a plurality of auxiliary nozzles are installed on both sides of the material distribution trolley, and the plurality of auxiliary nozzles are connected to a water pump and a water storage tank in sequence through auxiliary water pipes.

2. The hierarchically controlled dry coke quenching humidification system according to claim 1, characterized in that: The material guide trough is provided with an upper cover, the suction steam hood is connected to the material guide trough through the upper cover, and the exhaust fan is located on the top of the suction steam hood.

3. The hierarchically controlled dry coke quenching humidification system according to claim 1, characterized in that: Two partitions are arranged in the sedimentation tank, and the heights of the two partitions are lower than the height of the sedimentation tank. The two partitions divide the sedimentation tank into a first sedimentation chamber, a second sedimentation chamber, and a third sedimentation chamber. The first sedimentation chamber is close to the connection between the sedimentation tank and the water diversion ditch, the third sedimentation chamber is far away from the connection between the sedimentation tank and the water diversion ditch, and the second sedimentation chamber is located between the first sedimentation chamber and the third sedimentation chamber.

4. The hierarchically controlled dry coke quenching humidification system according to claim 3, characterized in that: The submersible pump is located in the third sedimentation chamber, and a filter and a water supply valve are installed on the water supply pipe from bottom to top in sequence. The water supply pipe is connected to the main water pipe after the water supply valve is installed. The main water pipe is installed with a main water valve. The main water pipe is connected to the water supply pipe after the main water valve is installed. After the main water pipe is connected to the water supply pipe, it is connected to the booster pump and the gas-water separator in sequence.

5. The hierarchically controlled dry coke quenching humidification system according to claim 4, characterized in that: A jacket is welded on the outer wall of the gas-water separator, a main water pipe is connected to the water inlet end of the jacket, a main water spray pipe is connected to the water outlet end of the jacket, a plurality of branch pipes are welded on the main water spray pipe, the branch pipes penetrate through and are welded to the side of the material guide trough, a plurality of main nozzles are installed on the branch pipes located inside the material guide trough, the main water spray pipe penetrates through the material guide trough through the branch pipes, and the main nozzles are installed on the main water spray pipe through the branch pipes.

6. The hierarchically controlled dry coke quenching humidification system according to claim 3, characterized in that: The steam absorption pipe is connected to the steam inlet end of the gas-water separator, the drain pipe is connected to the drain end of the gas-water separator, and the end of the drain pipe is located in the third sedimentation chamber of the sedimentation tank.

7. The hierarchically controlled dry coke quenching humidification system according to claim 1, characterized in that: The material distribution trolley has a Y-shaped discharge hopper with inclined surfaces on both sides of the discharge hopper. T-shaped auxiliary water spray pipes are penetrated and welded on the inclined surfaces on both sides of the discharge hopper. Several auxiliary nozzles are installed on the auxiliary water spray pipes located inside the discharge hopper. Two auxiliary water spray pipes are connected to water supply valves on the outside of the discharge hopper. Both water supply valves have hoses, and both hoses are connected to the auxiliary water pipes. The auxiliary water pipes are connected to the auxiliary nozzles through the hoses, auxiliary water spray pipes, and water supply valves.

8. A hierarchical humidification method for a hierarchically controlled dry coke quenching humidification system according to any one of claims 1 to 7, characterized in that: The following steps are involved: (1) Primary water replenishment: Turn on the water pump and water replenishment valve. After water replenishment, the moisture content of the coke is 1-2%; (2) Secondary water replenishment: Open the main water valve, do not start the booster pump, and the water content of the coke after water replenishment is 2-3%; (3) Level 3 water replenishment: Turn on the water pump, water replenishment valve, and main water valve at the same time, but do not turn on the booster pump. After water replenishment, the moisture content of the coke is 3-4%; (4) Level 4 water replenishment: Open the main water valve and the pressure pump. After water replenishment, the moisture content of the coke is 4-5%; (5) Level 5 water replenishment: Turn on the water pump and water replenishment valve, and at the same time turn on the main water valve and booster pump. After water replenishment, the water content of the coke is 5-6%; (6) Water recovery: The water leaking from the belt conveyor and coke bin is clarified through the diversion ditch and sedimentation tank and then used to replenish the coke. When the water in the sedimentation tank is used to replenish the coke, the submersible pump and the water supply valve are opened. The replenishment effect is the same as that of opening the main water valve.

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