Low-moisture coke quenching system combining nitrogen coke spraying and spray coke quenching
Through a low-water coking system combining nitrogen coking and spray coking quenching, the energy waste and environmental pollution problems of wet and dry coking quenching are solved, and the coking temperature reduction, water resource conservation and coking rate are achieved, and the coking yield and quality are improved.
Patent Information
- Application Number
- CN202422986095.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The existing wet and dry coking quenching technologies each have problems with energy waste and environmental pollution, and coke production and quality are difficult to meet the needs of enterprises.
A low-moisture coking system combining nitrogen coking and spray coking is used to combine nitrogen spray cover and spray coking. By combining nitrogen spray cover and spray cover, nitrogen is used to isolate the coke from contact with air and take away heat, and then low-moisture spraying is carried out to form a combination of inert gas nitrogen spraying and low-moisture wet spraying.
Effectively reduce coke temperature, reduce spray water volume and water vapor emissions, save water resources, reduce coke rate, improve coke production and quality, and meet economic and environmental protection requirements.
Smart Images
Figure CN223176056U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of coal coking, and particularly relates to a low-moisture coke quenching system combining nitrogen injection coke spraying and spray coke quenching. Background Art
[0002] In China, wet coke quenching has been widely used for many years. However, this technology not only consumes a large amount of water, but also the sensible heat in the coke is wasted with the steam discharged during coke quenching. The cooled wet coke needs to be heated and dried before subsequent utilization, resulting in a great waste of heat sources. It also generates a large amount of wastewater, harmful gases, and highly polluting and difficult-to-degrade substances such as tar, seriously polluting the environment, and the coke will come into contact with air during the coke discharging process, resulting in serious oxidation. To overcome the deficiencies of wet coke quenching, dry coke quenching technology has emerged. This technology uses cold inert gas to exchange heat with the hot red coke in the dry coke quenching furnace to cool the red coke. Compared with wet coke quenching, the moisture content of the coke can be greatly reduced, but the coke output will decrease, and the metallurgical coke rate will decrease while the powder coke rate will increase. The use of both methods has certain defects and problems and cannot well meet the enterprise's requirements for coke quenching. Therefore, it is objectively necessary to develop a low-moisture coke quenching system combining nitrogen injection coke spraying and spray coke quenching that can save energy, cause little environmental pollution, and have a low powder coke rate. Content of the Utility Model
[0003] The purpose of the utility model is to provide a low-moisture coke quenching system combining nitrogen injection coke spraying and spray coke quenching that can save energy, cause little environmental pollution, and have a low powder coke rate.
[0004] The purpose of the utility model is achieved as follows: it includes a coke oven and a track arranged on one side of the coke oven. An extinguishing car is arranged on the track. Above the extinguishing car, a nitrogen spraying hood and a spray hood are sequentially arranged along the track direction. An opening is arranged on the side wall of the nitrogen spraying hood facing the coke oven, and an external nitrogen spraying pipe in an inverted U shape is arranged on the side wall of the nitrogen spraying hood around the opening. A suction pipe is arranged on the nitrogen spraying hood. An exhaust port is arranged at the top of the spray hood, and a spray pipe is arranged at the lower part inside the spray hood. The bottom of the extinguishing car is connected with a sewage treatment device through a pipeline, and the clear water outlet of the sewage treatment device is communicated with the spray pipe through a pipeline.
[0005] Further, an internal nitrogen spraying pipe is arranged at the top inside the nitrogen spraying hood.
[0006] Further, a number of cooling pipes are arranged in rows and at intervals inside the spray hood above the spray pipe. Both ends of the cooling pipes extend out of the spray hood and are respectively connected with a water inlet collecting tank and a water outlet collecting tank. A cooler is arranged on one side of the spray hood. The water inlet collecting tank is communicated with the cold water outlet of the cooler through a pipeline, and the water outlet collecting tank is communicated with the hot water inlet of the cooler through a pipeline.
[0007] Further, a number of annular heat absorption fins are arranged on the cooling pipes.
[0008] Furthermore, water baffle plates with a V-shaped cross-section are staggeredly arranged on the side wall of the spray hood between the cooling pipe and the spray pipe. One end of the water baffle plate is fixedly connected to the spray hood, and the other end is sealed. A drain pipe is arranged on the side wall of the spray hood at the bottom of the water baffle plate, and the end of the drain pipe is communicated with the water inlet of the sewage treatment device.
[0009] Furthermore, the sewage treatment device includes a treatment tank and a sewage treatment station. The treatment tank includes a primary sedimentation tank, a secondary sedimentation tank, and a clear water tank arranged in sequence. The bottom of the coke quenching car is communicated with the primary sedimentation tank through a pipeline. The primary sedimentation tank is communicated with the secondary sedimentation tank, and the secondary sedimentation tank is communicated with the sewage treatment station through a pipeline. The water outlet of the sewage treatment station is communicated with the clear water tank through a pipeline, and the clear water tank is communicated with the spray pipe through a pipeline.
[0010] The utility model is used for the coke quenching operation. During operation, the nitrogen spraying hood is located at the position outside the coke oven door, and the external nitrogen spraying pipe is located around the coke oven door. The hot red coke is pushed from the coke oven door to the quenching car. During this process, cold nitrogen gas at a certain pressure is introduced into the external nitrogen spraying pipe, and the nitrogen gas is sprayed from the external nitrogen spraying pipe onto the coke. On the one hand, it isolates the coke from the air, and on the other hand, it takes away the heat of the coke. Subsequently, the coke enters the quenching car, and the quenching car moves the coke on the track. When the quenching car moves to the position below the spraying hood and stops, the coke is sprayed through the spraying pipe. When the temperature of the coke drops to the required temperature, the spraying pipe is closed. The excess unevaporated water during the spraying process flows into the sewage treatment device through the pipeline, and after processes such as sedimentation, decontamination, and cooling, it returns to the spraying pipe to continue the spraying treatment of the coke. The coke completes the quenching operation through nitrogen spraying and spraying treatment, and is transported by the quenching car to the next process for further treatment. In the utility model, on the one hand, nitrogen inert gas is used for nitrogen spraying operation, and on the other hand, the low-moisture wet spraying quenching method is adopted. The two methods are combined. Compared with the traditional wet quenching method, nitrogen spraying operation is first carried out on the coke. The coke is wrapped with nitrogen to separate the coke from the air, which not only protects the coke and prevents the coke from contacting the air and oxidizing, but also can reduce the temperature of the coke. After nitrogen spraying on the coke, the temperature of the coke has been greatly reduced. When entering the spraying quenching, the amount of spraying water required will be greatly reduced, the generated water vapor will be relatively less, and the water vapor discharged into the air will be reduced, reducing the waste of energy, the generated wastewater will also be reduced, saving water resources, and reducing environmental pollution; compared with the single dry quenching method, the utility model will also carry out spraying quenching after nitrogen spraying quenching. Since it is not necessary to directly reduce the temperature of the coke to the required quenching temperature with nitrogen, the problem of the current reduction in coke production can be alleviated and solved to a certain extent, and the increase in the pulverized coke rate can be prevented. In short, the utility model adopts the method of combining inert gas spraying on coke + low-moisture wet spraying quenching for quenching. After quenching, the water content in the coke is relatively low, and the coke production and quality can be guaranteed, meeting the economic and environmental protection requirements. To sum up, the utility model has the advantages of energy conservation, small environmental pollution, and low pulverized coke rate. Brief Description of the Drawings
[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0012] Figure 2 It is a schematic diagram of the structure of the coke oven 1 and the nitrogen spraying hood 4 in the utility model;
[0013] In the figure: 1 - coke oven, 2 - track, 3 - coke quenching car, 4 - nitrogen injection hood, 5 - spray hood, 6 - opening, 7 - external nitrogen injection pipe, 8 - suction pipe, 9 - exhaust port, 10 - spray pipe, 11 - sewage treatment device, 12 - internal nitrogen injection pipe, 13 - cooling pipe, 14 - water inlet collecting tank, 15 - water outlet collecting tank, 16 - cooler, 17 - heat absorbing fin, 18 - water baffle, 19 - drain pipe, 20 - sewage treatment station, 21 - primary sedimentation tank, 22 - secondary sedimentation tank, 23 - clear water tank. Detailed implementation mode
[0014] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any change or improvement based on the present invention falls within the protection scope of the present invention.
[0015] As Figures 1-2 shown, the present invention includes a coke oven 1 and a track 2 arranged on one side of the coke oven 1. A coke quenching car 3 is arranged on the track 2. Above the coke quenching car 3, a nitrogen injection hood 4 and a spray hood 5 are sequentially arranged along the direction of the track 2. The nitrogen injection hood 4 and the spray hood 5 are in an inverted hood-shaped structure. When the coke quenching car 3 moves below the two, a relatively sealed closed structure can be formed with the coke quenching car 3, facilitating the operations of nitrogen injection coke quenching and spray coke quenching. An opening 6 is arranged on the side wall of the nitrogen injection hood 4 facing the coke oven 1. An external nitrogen injection pipe 7 in an inverted U shape is arranged on the side wall of the nitrogen injection hood 4 around the opening 6. A suction pipe 8 is arranged on the nitrogen injection hood 4. An exhaust port 9 is arranged at the top of the spray hood 5. A spray pipe 10 is arranged at the lower part inside the spray hood 5. The bottom of the coke quenching car 3 is connected to a sewage treatment device 11 through a pipeline. The sewage treatment device 11 is a prior art and is usually arranged in coking enterprises for treating sewage. The clear water outlet of the sewage treatment device 11 is communicated with the spray pipe 10 through a pipeline. In the present invention, after the sewage treatment is completed, it is returned to the spray coke quenching operation process to continue, which can realize the recycling of water resources, improve the utilization rate of water resources, and reduce the waste of water resources.
[0016] The utility model is used for the coke quenching operation of coke. During operation, the nitrogen spraying hood 4 is located outside the furnace door of the coke oven 1, and the external nitrogen spraying pipe 7 is located around the furnace door of the coke oven 1. The hot red coke is pushed from the furnace door of the coke oven 1 onto the quenching car 3. During this process, cold nitrogen gas at a certain pressure is introduced into the external nitrogen spraying pipe 7, and the nitrogen gas is sprayed from the external nitrogen spraying pipe 7 onto the coke. On the one hand, it isolates the coke from the air, and on the other hand, it takes away the heat of the coke. Subsequently, the coke enters the quenching car 3, and the quenching car 3 moves the coke on the track 2. When the quenching car 3 moves to the position below the spraying hood 5 and stops, the coke is sprayed through the spraying pipe 10. When the temperature of the coke drops to the required temperature, the spraying pipe 10 is closed. The excess unevaporated water during the spraying process flows into the sewage treatment device 11 through the pipeline, and after processes such as sedimentation, decontamination, and cooling, it returns to the spraying pipe 10 to continue the spraying treatment of the coke. The coke completes the quenching operation through nitrogen spraying and spraying treatment, and is transported by the quenching car 3 to the next process for further treatment. In the utility model, on the one hand, nitrogen inert gas is used for nitrogen spraying operation, and on the other hand, the low-moisture wet spraying quenching method is adopted. The two methods are combined. Compared with the traditional wet quenching method, the coke is first subjected to nitrogen spraying operation, and the coke is wrapped with nitrogen to separate the coke from the air. This not only protects the coke from contacting the air and oxidizing, but also can reduce the temperature of the coke. After nitrogen spraying on the coke, the temperature of the coke has been greatly reduced. When entering the spraying quenching, the amount of spraying water required will be greatly reduced, the generated water vapor will be relatively less, the water vapor discharged into the air will be reduced, the waste of energy will be reduced, the generated wastewater will be reduced, the water resources will be saved, and the environmental pollution will be reduced; compared with the single dry quenching method, the utility model will also perform spraying quenching after nitrogen spraying quenching. Since it is not necessary to directly reduce the temperature of the coke to the required quenching temperature by nitrogen, the problem of the current reduction in coke production can be alleviated and solved to a certain extent, and the increase in the pulverized coke rate can be prevented. All in all, the utility model adopts the method of combining inert gas spraying on coke + low-moisture wet spraying quenching for quenching. After quenching, the moisture content in the coke is relatively low, and the coke production and quality can be guaranteed, meeting the economic and environmental protection requirements.
[0017] An internal nitrogen spraying pipe 12 is arranged at the top inside the nitrogen spraying hood 4. In the utility model, the area between the coke oven 1 and the quenching car 3 is sprayed with nitrogen by using the external nitrogen spraying pipe 7 to prevent the coke from contacting the air. Subsequently, the coke enters the quenching car 3. At this time, the nitrogen spraying hood 4 is located above the quenching car 3, and the coke is continuously sprayed with nitrogen through the internal nitrogen spraying pipe 12 to improve the effect of nitrogen spraying treatment.
[0018] A plurality of cooling pipes 13 are arranged in rows and spaced apart in the spray hood 5 above the spray pipe 10. The two ends of the cooling pipes 13 extend out of the spray hood 5 and are respectively connected to a water inlet tank 14 and a water outlet tank 15. A cooler 16 is provided on one side of the spray hood 5. The water inlet tank 14 is connected to the cold water outlet of the cooler 16 via a pipeline, and the water outlet tank 15 is connected to the hot water inlet of the cooler 16 via a pipeline. In the actual production process, the spray quenching method will generate a large amount of water vapor. The discharge of this water vapor will cause a large amount of water resources to be lost, resulting in an increase in production costs. At the same time, the water vapor also contains a large amount of pollutants, which will cause significant pollution when discharged into the atmosphere. In order to alleviate this problem, cooling pipes 13 are provided. Cold water is passed through the cooling pipes 13 to cool the water vapor, which is condensed into condensed water. A large amount of water resources can be recovered, reducing water resource waste and production costs. At the same time, more pollutants will be left behind, reducing the content of pollutants discharged into the atmosphere, thereby reducing environmental pollution.
[0019] The cooling tube 13 is provided with a plurality of annular heat absorbing plates 17. The heat absorbing plates 17 are provided on the cooling tube 13, which can greatly increase the outer surface area of the cooling tube 13, thereby increasing the contact area between the cooling tube 13 and the water vapor, improving the condensation efficiency of the water vapor, and promoting the condensation of the water vapor.
[0020] Water baffles 18 with a V-shaped cross section are staggered on the side wall of the spray hood 5 between the cooling pipe 13 and the spray pipe 10. One end of the water baffle 18 is fixedly connected to the spray hood 5, and the other end is blocked. A drain pipe 19 is provided on the side wall of the spray hood 5 at the bottom of the water baffle 18. The end of the drain pipe 19 is connected to the water inlet of the sewage treatment device 11. When the utility model is in operation, the spray pipe 10 is used to spray water mist to quench the coke. The water absorbs heat and vaporizes to form water vapor. During the rising process, the water vapor encounters the cooling pipe 13 and is cooled into water droplets. If it is dripped directly onto the coke, on the one hand, due to the high temperature of the condensed water, it will not have a good quenching effect on the coke. On the other hand, a large amount of condensed water falling on the coke will also increase the water content of the coke. In order to avoid this situation, the water baffle 18 is used to receive the dripping water droplets, and then the water droplets are sent out of the spray hood 5 by the drain pipe 19 and enter the sewage treatment device 11 for treatment.
[0021] The sewage treatment device 11 includes a treatment tank and a sewage treatment station 20. The treatment tank includes a primary sedimentation tank 21, a secondary sedimentation tank 22, and a clear water tank 23 arranged in sequence. The bottom of the coke quenching car 3 is connected to the primary sedimentation tank 21 through a pipeline. The primary sedimentation tank 21 is connected to the secondary sedimentation tank 22, and the secondary sedimentation tank 22 is connected to the sewage treatment station 20 through a pipeline. The water outlet of the sewage treatment station 20 is connected to the clear water tank 23 through a pipeline, and the clear water tank 23 is connected to the spray pipe 10 through a pipeline. The primary sedimentation tank 21, the secondary sedimentation tank 22, and the sewage treatment station 20 are all prior arts. Among them, the primary sedimentation tank 21 and the secondary sedimentation tank 22 are used to sediment the sewage in sequence, and the sewage treatment station 20 is used to treat the sedimented sewage. It can be carried out in the way of "oxidation + coagulation sedimentation", or other effective ways can be used to treat the sewage. After treatment, the obtained clear water is sent to the clear water tank 23 for temporary storage, and when needed, it is returned to the spray pipe 10 to continue the coke quenching operation by spraying water.
Claims
1. A low-moisture coke quenching system combining nitrogen coke spraying and spray coke quenching, comprising a coke oven (1) and a track (2) arranged on one side of the coke oven (1), wherein a coke quenching car (3) is arranged on the track (2), and is characterized in that : Above the quenching car (3), a nitrogen spraying hood (4) and a spraying hood (5) are successively arranged along the direction of the track (2). An opening (6) is arranged on the side wall of the nitrogen spraying hood (4) facing the coke oven (1). An external nitrogen spraying pipe (7) in an inverted U shape is arranged on the side wall of the nitrogen spraying hood (4) around the opening (6). A suction pipe (8) is arranged on the nitrogen spraying hood (4). An exhaust port (9) is arranged at the top of the spraying hood (5). A spraying pipe (10) is arranged at the lower part inside the spraying hood (5). The bottom of the quenching car (3) is connected with a sewage treatment device (11) through a pipeline. The clear water outlet of the sewage treatment device (11) is communicated with the spraying pipe (10) through a pipeline.
2. The low-moisture coke quenching system combining nitrogen coke spraying and spray coke quenching according to claim 1, characterized in that : An internal nitrogen spraying pipe (12) is arranged at the top inside the nitrogen spraying hood (4).
3. The low-moisture coke quenching system combining nitrogen coke spraying and shower coke quenching according to claim 1, characterized in that : A number of cooling pipes (13) are arranged in rows and at intervals inside the spraying hood (5) above the spraying pipe (10). Both ends of the cooling pipes (13) extend out of the spraying hood (5) and are respectively connected with a water inlet collecting tank (14) and a water outlet collecting tank (15). A cooler (16) is arranged on one side of the spraying hood (5). The water inlet collecting tank (14) is communicated with the cold water outlet of the cooler (16) through a pipeline. The water outlet collecting tank (15) is communicated with the hot water inlet of the cooler (16) through a pipeline.
4. A low-moisture coke quenching system combining nitrogen coke spraying and spray coke quenching according to claim 3, characterized in that : A number of annular heat absorption fins (17) are arranged on the cooling pipes (13).
5. The low-moisture coke quenching system combining nitrogen coke spraying and spray coke quenching according to claim 3, characterized in that : Baffle plates (18) with a V-shaped cross section are arranged in a staggered manner on the side wall of the spraying hood (5) between the cooling pipes (13) and the spraying pipe (10). One end of the baffle plate (18) is fixedly connected with the spraying hood (5), and the other end is blocked. A drain pipe (19) is arranged on the side wall of the spraying hood (5) at the bottom of the baffle plate (18). The end of the drain pipe (19) is communicated with the water inlet of the sewage treatment device (11).
6. The low-moisture coke quenching system combining nitrogen jet coke quenching and spray coke quenching according to claim 1, characterized in that : The sewage treatment device (11) includes a treatment tank and a sewage treatment station (20). The treatment tank includes a primary sedimentation tank (21), a secondary sedimentation tank (22), and a clear water tank (23) arranged in sequence. The bottom of the quenching car (3) is communicated with the primary sedimentation tank (21) through a pipeline. The primary sedimentation tank (21) is communicated with the secondary sedimentation tank (22). The secondary sedimentation tank (22) is communicated with the sewage treatment station (20) through a pipeline. The water outlet of the sewage treatment station (20) is communicated with the clear water tank (23) through a pipeline. The clear water tank (23) is communicated with the spraying pipe (10) through a pipeline.