Closed dry-method discharging device for dry distillation process of silty coal
By adopting a two-stage gas-sealed and gas-extinguishing structure in a closed-loop dry discharge device in coal chemical processing, the energy waste and environmental pollution problems caused by wet discharge have been solved, achieving efficient production and quality improvement of clean coal.
Patent Information
- Application Number
- CN202520251019.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-02-18
AI Technical Summary
Existing wet discharge devices in coal chemical processing enterprises lead to energy waste, environmental pollution, reduced quality of semi-coke, and equipment corrosion, and also result in high water consumption and serious heat waste.
A closed-loop dry discharge device is adopted, which utilizes a two-stage air-sealed and air-quenched structure, including a first-stage sealed discharge bin and a second-stage sealed discharge bin. The temperature of clean coal is reduced through spray pipes and heat exchange pipes, thereby reducing energy consumption and improving coal quality.
It reduces production energy consumption, improves the quality of clean coal, reduces water consumption and emissions of harmful substances, and avoids equipment corrosion and heat waste.
Smart Images
Figure CN223620339U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of coal chemical technology, and specifically relates to a closed-loop dry discharge device for the dry distillation process of pulverized coal. Background Technology
[0002] Existing coal chemical processing enterprises typically use wet discharge methods, which not only result in significant energy waste but also severely pollute the environment. The discharge device used in semi-coke production is a water-sealed quenching unit, equipped with a drying bed; the process involves quenching, drying, and discharging the coke. The hot semi-coke, at approximately 550°C inside the furnace, is pushed by a coke pusher into a quenching trough filled with quenching water. After quenching and cooling, it is conveyed by a scraper conveyor, dried on the drying bed, and then sent to the coke bin, where it is crushed, screened, and transported out.
[0003] The existing discharge device has the following problems: (1) The quenching process is done by directly quenching with water, which consumes a lot of water resources. It is estimated that 0.2 tons of quenching water are consumed for every ton of semi-coke wet quenching. (2) A large amount of steam generated by wet quenching is directly discharged into the atmosphere, and the sensible heat of the hot semi-coke is also wasted with the steam discharge. The heat consumed for producing 1 ton of semi-coke is about 2.21 to 2.35 GJ, of which 1.05 GJ is wasted by wet quenching, accounting for about 45% of the total heat consumed. (3) The semi-coke pushed out of the carbonization chamber is at a temperature of about 550℃. During wet quenching, the hot semi-coke is rapidly cooled in water, and the internal structure of the semi-coke generates a lot of thermal stress, forming a large number of network structures with high porosity. Therefore, its strand strength is low and it is easy to break into small pieces, which reduces the quality of the semi-coke. (4) During wet quenching, the hot semi-coke is cooled in water. The cooled semi-coke with water needs to be heated and dried, which wastes a lot of coal gas. (5) During the wet quenching process, the hot semi-coke comes into contact with water and produces a large amount of harmful substances such as phenols, cyanides and sulfur compounds. These substances are released freely with the steam generated during quenching, which seriously corrodes the surrounding equipment and pollutes the atmosphere. Summary of the Invention
[0004] To address the aforementioned problems, the purpose of this utility model is to provide a closed-loop dry discharge device for the dry distillation process of pulverized coal. By using a two-stage gas-sealed and gas-quenched structure, the quality of clean coal can be improved while reducing production energy consumption.
[0005] The technical solution of this utility model is as follows: a closed-loop dry discharge device for the dry distillation process of pulverized coal, comprising a discharge silo support foundation, above which are sequentially arranged two-stage sealed discharge silos, a first-stage sealed discharge silo, and the tail end of the pulverized coal dry distillation chamber. The upper part of the first-stage sealed discharge silo is fixedly connected to the tail end of the pulverized coal dry distillation chamber, and the lower part of the first-stage sealed discharge silo is fixedly connected to the upper part of the two-stage sealed discharge silos. The upper sidewall of the first-stage sealed discharge silo is provided with a first-stage discharge silo air-water regulating pipe and a first-stage discharge silo internal spray pipe. The first section of the discharge hopper has a spray pipe with nozzles evenly arranged inside the sealed discharge hopper. The lower part of the sealed discharge hopper has a conical end, and the bottom of the conical end has an electric gate valve. The upper side wall of the second section of the sealed discharge hopper has a second section of discharge hopper air-water regulating pipe and a second section of discharge hopper spray pipe. The second section of the discharge hopper spray pipe has nozzles evenly arranged inside the sealed discharge hopper. The lower part of the second section of the discharge hopper spray pipe has a conical end, and the bottom of the conical end has a second section of electric gate valve.
[0006] The outer shells of the first-stage sealed discharge hopper and the second-stage sealed discharge hopper are rectangular parallelepiped structures.
[0007] The spray pipes in one section of the discharge bin are arranged circumferentially along the upper part of the sealed discharge bin, and the distance between the nozzles in adjacent discharge bins is 0.5m.
[0008] The spray pipes inside the two-stage discharge hoppers are arranged circumferentially along the upper part of the two-stage sealed discharge hoppers, and the distance between the nozzles in the two adjacent discharge hoppers is 0.5m.
[0009] The inner side wall of the first sealed discharge hopper is provided with a heat exchange tube, and the inner side wall of the second sealed discharge hopper is provided with two heat exchange tubes.
[0010] The technical effect of this utility model is that by using a two-stage air-sealed and air-extinguishing structure with a first-stage sealed discharge bin and a second-stage sealed discharge bin at the tail end of the pulverized coal dry distillation chamber, the quality of clean coal can be improved while reducing production energy consumption.
[0011] The following will provide further explanation in conjunction with the accompanying drawings. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of a closed-loop dry discharge device for the dry distillation process of pulverized coal according to this utility model.
[0013] Figure reference numerals: 1-Tail end of pulverized coal dry distillation chamber; 2-First-stage sealed discharge silo; 3-Second-stage sealed discharge silo; 4-Second-stage electric gate valve; 5-Second-stage discharge silo air-water regulating pipe; 6-Second-stage silo internal heat exchange pipe; 7-Second-stage discharge silo internal spray pipe; 8-Second-stage discharge silo internal nozzle; 9-First-stage silo internal heat exchange pipe; 10-First-stage electric gate valve; 11-First-stage discharge silo air-water regulating pipe; 12-First-stage discharge silo internal spray pipe; 13-First-stage discharge silo internal nozzle; 14-Discharge silo support foundation. Detailed Implementation Example 1
[0014] like Figure 1 As shown, a closed-loop dry discharge device for pulverized coal pyrolysis includes a discharge silo support foundation 14. Above the discharge silo support foundation 14 are sequentially arranged two-stage sealed discharge silos 3, a first-stage sealed discharge silo 2, and a tail section 1 of the pulverized coal pyrolysis chamber. The upper part of the first-stage sealed discharge silo 2 is fixedly connected to the tail section 1 of the pulverized coal pyrolysis chamber, and the lower part of the first-stage sealed discharge silo 2 is fixedly connected to the upper part of the two-stage sealed discharge silos 3. The upper sidewall of the first-stage sealed discharge silo 2 is provided with a first-stage discharge silo air-water regulating pipe 11 and a first-stage discharge silo internal spray pipe 12. The spray pipe 12 inside the discharge hopper has a section of nozzles 13 evenly arranged inside the first section of the sealed discharge hopper 2. The lower part of the first section of the sealed discharge hopper 2 has a conical end, and the bottom of the conical end has a section of electric gate valve 10. The upper side wall of the second section of the sealed discharge hopper 3 has a second section of air-water regulating pipe 5 and a second section of spray pipe 7. The spray pipe 7 inside the second section of the discharge hopper has a section of nozzles 8 evenly arranged inside the second section of the sealed discharge hopper 3. The lower part of the spray pipe 7 inside the second section of the discharge hopper has a conical end, and the bottom of the conical end has a section of electric gate valve 4.
[0015] In use, this invention first starts the heat exchange circulation system, opens the electric gate valve 10 between the first-stage sealed discharge silo 2 and the second-stage sealed discharge silo 3, allowing the hot, clean coal discharged from the tail end 1 of the sealed distillation chamber to fall into the second-stage sealed discharge silo 3. When the clean coal pile in the second-stage sealed discharge silo 3 reaches three-quarters of its height, the first-stage electric gate valve 10 is closed, and the second-stage discharge silo air-water regulating pipe 5 at the top of the second-stage sealed discharge silo 3 is opened to maintain a positive pressure state inside the second-stage sealed discharge silo 3. The spray pipe 7 inside the second-stage discharge silo is intermittently opened to lower the temperature of the clean coal below 150℃, at which point the second-stage electric gate valve 4 is opened. Once the second-stage sealed discharge silo 3 has finished discharging, this procedure is repeated continuously for production. This invention, by using a two-stage air-sealed and air-extinguishing structure with a first-stage and second-stage sealed discharge silos at the tail end of the pulverized coal distillation chamber, can improve the quality of clean coal while reducing production energy consumption. Example 2
[0016] Based on Example 1, in this embodiment, preferably, the outer shells of the first-stage sealed discharge hopper 2 and the second-stage sealed discharge hopper 3 are cuboid structures.
[0017] The outer shells of the first-stage sealed discharge bin 2 and the second-stage sealed discharge bin 3 described in this utility model are rectangular parallelepiped structures, which facilitates installation and use. Example 3
[0018] Based on Embodiment 1 or Embodiment 2, in this embodiment, preferably, the spray pipe 12 in the discharge bin is arranged circumferentially along the upper part of the sealed discharge bin 2, and the distance between the nozzles 13 in adjacent discharge bins is 0.5m.
[0019] The spray pipe 12 in the discharge bin described in this utility model is arranged circumferentially along the upper part of the sealed discharge bin 2. The distance between the nozzles 13 in adjacent discharge bins is 0.5m, which ensures that the spray pipe 12 in the discharge bin can quickly reduce the temperature of the clean coal in the sealed discharge bin 2 to 150℃. Example 4
[0020] Based on Example 1, in this example, preferably, the spray pipe 7 in the two-stage discharge bin is arranged circumferentially along the upper part of the two-stage sealed discharge bin 3, and the distance between the nozzles 13 in adjacent two-stage discharge bins is 0.5m.
[0021] The spray pipe 7 in the two-stage discharge bin described in this utility model is arranged circumferentially along the upper part of the two-stage sealed discharge bin 3. The distance between the nozzles 13 in adjacent two-stage discharge bins is 0.5m, which ensures that the spray pipe 7 in the two-stage discharge bin can rapidly reduce the temperature of the clean coal in the two-stage sealed discharge bin 3 to 150℃. Example 5
[0022] Based on Embodiment 1 or Embodiment 4, in this embodiment, preferably, the inner side wall of the first sealed discharge hopper 2 is provided with a section of in-hopper heat exchange pipe 9, and the inner side wall of the second sealed discharge hopper 3 is provided with two sections of in-hopper heat exchange pipe 6.
[0023] The present invention provides a heat exchange tube 9 on the inner side wall of the first-stage sealed discharge silo 2 and a heat exchange tube 6 on the inner side wall of the second-stage sealed discharge silo 3, which facilitates heat exchange between the first-stage sealed discharge silo 2 and the second-stage sealed discharge silo 3, and enables rapid cooling of clean coal.
[0024] The working principle of this utility model is as follows: During operation, the heat exchange circulation system is first started, and the electric gate valve 10 between the first-stage sealed discharge silo 2 and the second-stage sealed discharge silo 3 is opened. The hot clean coal discharged from the tail end 1 of the sealed dry distillation chamber falls into the second-stage sealed discharge silo 3. When the clean coal in the second-stage sealed discharge silo 3 is piled up to three-quarters of its height, the electric gate valve 10 is closed, and the air-water regulating pipe 5 at the top of the second-stage sealed discharge silo 3 is opened to keep the second-stage sealed discharge silo 3 under positive pressure. The spray pipe 7 in the second-stage discharge silo is opened intermittently. When the temperature of the clean coal drops below 150°C, the electric gate valve 4 is opened. After the second-stage sealed discharge silo 3 has finished discharging, this procedure is repeated continuously for continuous production.
[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.
Claims
1. A closed-loop dry discharge device for pulverized coal carbonization process, characterized in that: The system includes a discharge silo support foundation (14), above which are arranged a two-section sealed discharge silo (3), a one-section sealed discharge silo (2), and the tail end (1) of the pulverized coal dry distillation chamber. The upper part of the one-section sealed discharge silo (2) is fixedly connected to the tail end (1) of the pulverized coal dry distillation chamber, and the lower part of the one-section sealed discharge silo (2) is fixedly connected to the upper part of the two-section sealed discharge silo (3). The upper side wall of the one-section sealed discharge silo (2) is provided with a discharge silo air-water regulating pipe (11) and a discharge silo internal spray pipe (12). The discharge silo internal spray pipe (12) is located in a... The first section of the sealed discharge bin (2) is uniformly provided with a first section of discharge bin nozzles (13). The lower part of the first section of the sealed discharge bin (2) is provided with a conical end, and the bottom of the conical end is provided with a first section of electric gate valve (10). The upper side wall of the second section of the sealed discharge bin (3) is provided with a second section of discharge bin air-water regulating pipe (5) and a second section of discharge bin spray pipe (7). The second section of the discharge bin spray pipe (7) is uniformly provided with two sections of discharge bin nozzles (8) inside the second section of the sealed discharge bin (3). The lower part of the second section of the discharge bin spray pipe (7) is provided with a conical end, and the bottom of the conical end is provided with a second section of electric gate valve (4).
2. The closed-loop dry discharge device for the dry distillation process of pulverized coal according to claim 1, characterized in that: The outer shells of the first-stage sealed discharge hopper (2) and the second-stage sealed discharge hopper (3) are rectangular parallelepiped structures.
3. The closed-loop dry discharge device for the dry distillation process of pulverized coal according to claim 1, characterized in that: The spray pipe (12) in the discharge bin is arranged circumferentially along the upper part of the sealed discharge bin (2), and the distance between the nozzles (13) in adjacent discharge bins is 0.5m.
4. The closed-loop dry discharge device for the dry distillation process of pulverized coal according to claim 1, characterized in that: The spray pipe (7) inside the two-stage discharge hopper is arranged circumferentially along the upper part of the two-stage sealed discharge hopper (3), and the distance between the nozzles (13) inside the adjacent two-stage discharge hoppers is 0.5m.
5. The closed-loop dry discharge device for the dry distillation process of pulverized coal according to claim 1, characterized in that: The inner side wall of the first sealed discharge hopper (2) is provided with a heat exchange tube (9), and the inner side wall of the second sealed discharge hopper (3) is provided with two heat exchange tubes (6).