Coal hydrogen gasification furnace slag recycling and blending system
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUEYANG CHANGLING EQUIP RES INST
- Filing Date
- 2025-07-25
- Publication Date
- 2026-06-19
Smart Images
Figure CN224381542U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of solid waste resource utilization technology, specifically a coal-to-hydrogen gasification slag recycling and co-firing system. Background Technology
[0002] In a coal-to-hydrogen gasifier, coal reacts with oxygen and steam under high temperature and pressure to produce syngas, while also generating a large amount of slag. The gasification slag consists of two parts: coarse slag from the bottom of the gasifier and fine slag from the top. Due to the relatively low performance or operational level of the coal-to-hydrogen gasifier equipment, the gasification efficiency is poor, resulting in the slag containing a lot of unreacted carbon (residual carbon).
[0003] In practical applications, gasification slag is generally sent outside the plant for low-value-added utilization (such as brick making) or solid waste treatment (landfill). For example, a petrochemical plant's coal-to-hydrogen unit produces about 400 tons of gasification slag per day, including 100 tons of fine slag and 300 tons of coarse slag per day. Currently, the slag is treated by outsourcing it as solid waste, with an outsourcing cost of about 50 yuan per ton, and a total annual outsourcing cost of about 7 million yuan.
[0004] The residual carbon in coal-to-hydrogen gasification slag is high. For example, the residual carbon in the fine slag of a certain petrochemical plant's coal-to-hydrogen gasification furnace is as high as 29%, and the residual carbon in the coarse slag is as high as 22%. Outsourcing the treatment of gasification slag with such high residual carbon as solid waste not only wastes energy and resources, but also incurs huge solid waste outsourcing costs, and will also face potential environmental risks.
[0005] In summary, how to better realize the recycling of carbon-containing gasification slag back into the boiler for combustion and utilization, recovering the calorific value of the residual carbon, and replacing part of the raw coal will not only reduce carbon emissions and solid waste disposal, but also have significant economic and social benefits. Therefore, a coal-to-hydrogen gasification slag recycling and co-firing system is proposed to address the above issues. Utility Model Content
[0006] To address the above problems, this utility model provides a coal-to-hydrogen gasification slag recycling and co-firing system, which solves the problems of improving the efficiency of gasification slag co-firing and utilization in boilers, recovering residual carbon, reducing solid waste, and reducing costs.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0008] A coal-to-hydrogen gasification slag recycling and co-firing system includes a first chamber and a second chamber for storing and conveying different gasification slags. The bottom discharge side of the first chamber and the bottom discharge side of the second chamber are connected to each other and connected to a mixing conveyor that can mix different gasification slags. A dryer for drying the mixed slag is provided on the discharge side of the mixing conveyor, and a raw coal storage yard for mixing and storing the dried slag with raw coal is provided on the discharge side of the dryer.
[0009] As a further improvement to the above solution, a dust removal device is also installed on the discharge side of the dryer to facilitate the treatment of the dried exhaust gas. The dust removal device is connected to the dryer through a pipe, and a fan is installed on the connected pipe to facilitate the introduction of the exhaust gas into the dust removal device.
[0010] As a further improvement to the above scheme, a feeding hopper is connected to the bottom of the first and second compartments, and the discharge port of the feeding hopper is connected to the mixing conveyor.
[0011] A stirring rod is installed inside the feed hopper, and a vibrator is fixed on the outside.
[0012] As a further improvement to the above solution, a control component for controlling the discharge of materials from the first and second chambers is installed on the top of the feeding hopper;
[0013] The control assembly includes a first baffle plate for insertion into the bottom discharge port of the first chamber and a second baffle plate for insertion into the bottom discharge port of the second chamber. A cylinder is provided at the top of the feed hopper. One end of the output shaft of the cylinder is connected to the second baffle plate, and a gear and rack mechanism for controlling the movement of the first baffle plate is connected to the output shaft of the cylinder. The first baffle plate and the second baffle plate open and close the discharge ports of the first chamber and the second chamber synchronously.
[0014] As a further improvement to the above solution, the gear and rack mechanism includes a rack that is connected to the first blocking plate and the second blocking plate respectively, and a gear that meshes with the rack in the middle, wherein the rack that meshes with the first blocking plate is adjustablely positioned with respect to the first blocking plate.
[0015] As a further improvement to the above solution, the mixing conveyor includes an outer shell that is interconnected with the first chamber and the second chamber, and a main shaft is rotatably installed inside the outer shell, with one end of the main shaft connected to a drive source;
[0016] The main shaft is equipped with spiral blades and agitator blades. The agitator blades are close to the feed inlet of the outer shell and are arranged at an angle.
[0017] As a further improvement to the above scheme, the dryer is a steam tube drum dryer, and a condensate tank is also connected to the dryer.
[0018] As a further improvement to the above scheme, an elevator is installed on the discharge side of the dryer to send the dried slag into the raw coal yard.
[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0020] 1. Through this co-firing system, gasification slag of different fineness can be mixed and dried and then mixed with raw coal for further combustion. This treatment method not only reduces additional solid waste treatment costs, but also further burns the residual carbon in the gasification slag, which can effectively save resource costs.
[0021] 2. Within the entire system, the drying process of the slag allows it to burn normally after being mixed with raw coal. Furthermore, the exhaust gas produced after the process is treated by a dust removal device and can be directly discharged without generating more pollution, making the process simpler.
[0022] 3. By introducing gasification slag of different fineness into the first and second chambers, continuous feeding can be achieved. Initial mixing takes place in the feed hopper, and the slag in the feed hopper can be vibrated and agitated by the stirring rod and vibrator to prevent blockage before entering the mixing conveyor. After entering the mixing conveyor, the slag is first agitated and mixed by the stirring blades, and then conveyed by the spiral blades. With the stirring blades arranged at an angle, the effect of mixing and conveying can be achieved simultaneously. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0024] Figure 2 This is a schematic diagram of the installation structure between the first compartment, the second compartment, and the mixing conveyor in this utility model;
[0025] Figure 3 for Figure 2 A magnified schematic diagram of the structure at point A in the middle.
[0026] In the diagram: 10. First compartment; 101. First baffle plate; 11. Second compartment; 111. Second baffle plate; 12. Mixing conveyor; 121. Outer casing; 122. Main shaft; 123. Spiral blade; 124. Agitator blade; 13. Dryer; 14. Elevator; 15. Raw coal storage area; 16. Fan; 17. Dust removal device; 18. Feed hopper; 181. Agitator rod; 182. Vibrator; 19. Cylinder; 20. Condensate tank. Detailed Implementation
[0027] To enable those skilled in the art to better understand the technical solution, the present invention will be described in detail below with reference to the embodiments. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.
[0028] like Figure 1-3 As shown, the specific solution of this embodiment is as follows: a coal-to-hydrogen gasification slag recycling and co-firing system, including a first chamber 10 and a second chamber 11 for storing and conveying different gasification slags. Specifically, the first chamber 10 is mainly used for storing and conveying fine gasification slags, and the second chamber 11 is mainly used for storing and conveying coarse gasification slags. The bottom discharge side of the first chamber 10 and the bottom discharge side of the second chamber 11 are connected to each other and connected to a mixing conveyor 12 that can mix different gasification slags. A dryer 13 for drying the mixed slags is provided on the discharge side of the mixing conveyor 12. Specifically, the dryer 13 is a steam tube drum dryer. A condensate tank 20 is also connected to the dryer 13. The condensate in the condensate tank 20 flows back to the boiler to be heated to generate steam.
[0029] The discharge side of the dryer 13 is equipped with a raw coal storage yard 15, which mixes the dried slag with raw coal and stores it. The discharge side of the dryer 13 is also equipped with an elevator 14 that feeds the dried slag into the raw coal storage yard 15. Therefore, in this application, by mixing gasification slag of different fineness, drying it, mixing it with raw coal, and then re-combusting it, the residual carbon in the gasification slag can be further consumed, and additional solid waste treatment costs can be reduced.
[0030] As a preferred embodiment of the above, a dust removal device 17 is also provided on the discharge side of the dryer 13 to facilitate the treatment of the dried exhaust gas. The dust removal device 17 is connected to the dryer 13 through a pipe, and a fan 16 is provided on the pipe to facilitate the introduction of exhaust gas into the dust removal device 17. Specifically, the dust removal device 17 is a wet spray dust removal tower, which is the prior art and is used to remove a small amount of dust that may be carried in the exhaust steam. Compared with the solid waste treatment method, only a small amount of dust needs to be removed, and the treatment process is simpler.
[0031] As a preferred embodiment of the above, a feeding hopper 18 is connected to the bottom of the first chamber 10 and the second chamber 11. The discharge port of the feeding hopper 18 is connected to the mixing conveyor 12. An agitator 181 is rotatably installed inside the feeding hopper 18, and a vibrator 182 is fixedly installed on the outside. Specifically, a flexible hose is used to connect the discharge port of the feeding hopper 18 to the inlet of the mixing conveyor 12. This reduces interference with the mixing conveyor 12 when the vibrator 182 drives the feeding hopper 18 to vibrate. The agitator 181 and the vibrator 182 are provided to reduce the situation where gasification slag is blocked and does not fall into the feeding hopper 18. On the other hand, they can also be used to mix two slags of different fineness.
[0032] The top of the feeding hopper 18 is equipped with a control component for controlling the discharge of materials from the first chamber 10 and the second chamber 11. Specifically, the control component includes a first baffle plate 101 inserted into the bottom outlet of the first chamber 10 and a second baffle plate 111 inserted into the bottom outlet of the second chamber 11. When the first baffle plate 101 and the second baffle plate 111 are respectively inserted into the outlets of the first chamber 10 and the second chamber 11, the discharge is stopped. A cylinder 19 is installed at the top of the feeding hopper 18. One end of the output shaft of the cylinder 19 is connected to the second baffle plate 111, and a gear and rack mechanism for controlling the movement of the first baffle plate 101 is connected to the output shaft of the cylinder 19. The first baffle plate 101 and the second baffle plate 111 synchronously open and close the outlets of the first chamber 10 and the second chamber 11. Figure 3 As shown, a support box for easy installation of a gear and rack mechanism is also provided on the top of the feed hopper 18. Specifically, the gear and rack mechanism includes a rack connected to the first baffle plate 101 and the second baffle plate 111 respectively, and a gear meshing with each other in the middle of the rack. The gear and the support box are rotatable relative to each other, and the rack and the support box are slidable relative to each other. The rack meshing with the first baffle plate 101 is adjustable relative to the first baffle plate 101. Specifically, multiple connection holes are provided on the first baffle plate 101. By installing the first baffle plate 101 and the rack on different adjustment holes, it is possible to achieve a non-stroke motion when driving the first baffle plate 101 to move. This allows for flexible control of the size of the opening of the first baffle plate 101's opening of the first chamber 10's opening when controlling the second baffle plate 111 to open the discharge port of the second chamber 11, so that the amount of coarse and fine slag falling into the feed hopper 18 is different, in order to meet actual configuration requirements.
[0033] As a preferred embodiment of the above, the mixing conveyor 12 includes an outer shell 121 that communicates with the first chamber 10 and the second chamber 11. A main shaft 122 is rotatably disposed inside the outer shell 121. One end of the main shaft 122 is connected to a drive source, specifically a drive motor. The output shaft of the motor is fixedly disposed with respect to the outer shell 121. The main shaft 122 is provided with a spiral blade 123 and an agitator blade 124. The agitator blade 124 is close to the feed inlet of the outer shell 121 and is arranged at an angle. By arranging the agitator blade 124 at an angle, the slag can be mixed and conveyed at the same time when the drive motor drives it to rotate.
[0034] It should be noted that, in this document, the terms "including," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Specific examples have been used in this document to illustrate the principles and implementation methods of the present invention. These examples are merely for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be pointed out that, due to the limitations of written expression and the objective existence of infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the present invention to other situations without modification, should all be considered within the scope of protection of the present invention.
Claims
1. A coal-to-hydrogen gasification furnace slag recycling and blending system, characterized in that, It includes a first chamber (10) and a second chamber (11) for storing and conveying different gasification slags. The bottom discharge side of the first chamber (10) and the bottom discharge side of the second chamber (11) are connected to each other and connected to a mixing conveyor (12) for mixing different gasification slags. A dryer (13) for drying the mixed slags is provided on the discharge side of the mixing conveyor (12). A raw coal storage yard (15) for mixing and storing the slag dried by the dryer (13) with raw coal is provided on the discharge side of the dryer (13).
2. The coal-to-hydrogen gasification slag recycling and co-firing system according to claim 1, characterized in that, The dryer (13) is also equipped with a dust removal device (17) on the discharge side to facilitate the treatment of the dried exhaust gas. The dust removal device (17) is connected to the dryer (13) through a pipe, and a fan (16) is installed on the pipe to facilitate the introduction of exhaust gas into the dust removal device (17).
3. The coal-to-hydrogen gasification slag recycling and co-firing system according to claim 1, characterized in that, The bottom of the first chamber (10) and the second chamber (11) are connected to a feeding hopper (18), and the discharge port of the feeding hopper (18) is connected to the mixing conveyor (12). A stirring rod (181) is rotatably installed inside the feed hopper (18), and a vibrator (182) is fixedly installed on the outside.
4. The coal-to-hydrogen gasification slag recycling and co-firing system according to claim 3, characterized in that, The top of the feeding hopper (18) is equipped with a control component for controlling the discharge of materials from the first chamber (10) and the second chamber (11); The control assembly includes a first baffle plate (101) for insertion into the bottom outlet of the first chamber (10) and a second baffle plate (111) for insertion into the bottom outlet of the second chamber (11). A cylinder (19) is provided on the top of the feed hopper (18). One end of the output shaft of the cylinder (19) is connected to the second baffle plate (111), and a gear and rack mechanism for controlling the movement of the first baffle plate (101) is connected to the output shaft of the cylinder (19). The first baffle plate (101) and the second baffle plate (111) open and close the outlets of the first chamber (10) and the second chamber (11) synchronously.
5. A coal-to-hydrogen gasification slag recycling and co-firing system according to claim 4, characterized in that, The gear and rack mechanism includes a rack that is connected to the first blocking plate (101) and the second blocking plate (111) respectively, and a gear that meshes with the rack in the middle, wherein the rack that meshes with the first blocking plate (101) is adjustable between the rack and the first blocking plate (101).
6. A coal-to-hydrogen gasification slag recycling and co-firing system according to claim 1, characterized in that, The mixing conveyor (12) includes an outer shell (121) that is connected to the first chamber (10) and the second chamber (11). A main shaft (122) is rotatably installed inside the outer shell (121), and one end of the main shaft (122) is connected to a drive source. The main shaft (122) is equipped with a spiral blade. The agitator (123) and the stirring blade (124) are located near the feed inlet of the outer shell (121) and are arranged at an angle.
7. A coal-to-hydrogen gasification slag recycling and co-firing system according to any one of claims 1-6, characterized in that, The dryer (13) is a steam tube drum dryer, and a condensate tank (20) is also connected to the dryer (13).
8. A coal-to-hydrogen gasification slag recycling and co-firing system according to any one of claims 1-6, characterized in that, A hoist (14) is installed on the discharge side of the dryer (13) to send the dried slag into the raw coal yard (15).