CN215947205U - Production device for resource utilization of coal gasification waste residues - Google Patents
Production device for resource utilization of coal gasification waste residues Download PDFInfo
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- CN215947205U CN215947205U CN202122113194.4U CN202122113194U CN215947205U CN 215947205 U CN215947205 U CN 215947205U CN 202122113194 U CN202122113194 U CN 202122113194U CN 215947205 U CN215947205 U CN 215947205U
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Abstract
The utility model belongs to a production device for resource utilization of coal gasification waste residues; the system comprises an air separation device and a carbon dioxide pipe network, wherein the air separation device is respectively arranged in a nitrogen pipe network and an oxygen pipe network, and the oxygen pipe network is respectively connected with gas-phase inlets of a first gasification furnace and a second gasification furnace; the solid inlet of the first gasification furnace is connected with the gasification raw material storage tank, and the solid outlet of the first gasification furnace is connected with the second gasification furnace through the waste residue treatment unit; the gas phase outlet of the first gasification furnace is connected with a process gas treatment unit; the carbon dioxide pipe network is connected with a gas-phase inlet of the second gasification furnace; the gas-phase outlet of the second gasification furnace is connected with the process gas treatment unit; the gasification furnace has the advantages of simple structure, reasonable design, realization of complete reaction of residual carbon in waste residues by taking carbon dioxide as a gasification agent, effective recovery of residual carbon in the waste residues, avoidance of loss of raw material coal and improvement of CO process gas flow.
Description
Technical Field
The utility model belongs to the technical field of coal gasification, and particularly relates to a production device for resource utilization of coal gasification waste residues.
Background
Under the large background of 'carbon neutralization' and 'carbon peak' each coal index is precious enough, and coal saving, energy saving and emission reduction are the major trends of the future coal chemical industry development. In the background of the times, most coal chemical enterprises also have the phenomena of coal loss, coal waste and the like, the coal chemical enterprises use coal as a raw material or adopt a water-coal-slurry process or a pulverized coal process to obtain process gases such as carbon monoxide, hydrogen, carbon dioxide and the like, and a gasification reactor (gasification furnace) discharges a large amount of waste residues while preparing the process gases, wherein the waste residues also contain 10-45% of residual carbon. The waste residues are directly discharged in the production process, so that the problem of coal waste is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art, and provides the production device for recycling the coal gasification waste residue, which has a simple structure and a reasonable design, takes carbon dioxide as a gasification agent, realizes complete reaction of the residual carbon in the waste residue, effectively recycles the residual carbon in the waste residue, avoids the loss of raw material coal, and improves the CO process gas amount.
The purpose of the utility model is realized as follows:
a production device for recycling coal gasification waste residues comprises an air separation device and a carbon dioxide pipe network, wherein the air separation device is respectively arranged in a nitrogen pipe network and an oxygen pipe network, and the oxygen pipe network is respectively connected with gas phase inlets of a first gasification furnace and a second gasification furnace; the solid inlet of the first gasification furnace is connected with the gasification raw material storage tank, and the solid outlet of the first gasification furnace is connected with the second gasification furnace through the waste residue treatment unit; the gas phase outlet of the first gasification furnace is connected with a process gas treatment unit; the carbon dioxide pipe network is connected with a gas-phase inlet of the second gasification furnace; and a gas-phase outlet of the second gasification furnace is connected with the process gas treatment unit.
Preferably, the waste residue processing unit comprises a waste residue collecting tank connected with a solid outlet of the first gasification furnace, and the waste residue collecting tank is connected with a solid inlet of the second gasification furnace through a waste residue dryer and a pulverizer; and a solid outlet of the second gasification furnace is connected with a carbon-free waste residue storage tank.
Preferably, the process gas treatment unit comprises a process gas distribution station, the process gas distribution station is connected with the first low-temperature methanol washing device through a carbon monoxide conversion device, and the first low-temperature methanol washing device is respectively connected with a hydrogen pipe network and a carbon dioxide pipe network.
Preferably, a tee joint is arranged between the process gas distribution station and the carbon monoxide conversion device, the third end of the tee joint is connected with a second low-temperature methanol washing device, and the second low-temperature methanol washing device is respectively connected with a carbon monoxide pipe network and a carbon dioxide pipe network; a carbon monoxide purification device is arranged between the second low-temperature methanol washing device and the carbon monoxide pipe network.
Preferably, the carbon dioxide pipe network is connected with a carbon dioxide user distribution station.
Preferably, the gas phase outlet of the second gasification furnace is connected with the gas phase inlet of the process gas distribution station.
Preferably, the first gasification furnace and the second gasification furnace are coal water slurry gasification furnaces or pulverized coal gasification furnaces.
According to the production device for recycling the coal gasification waste residue, which is manufactured according to the scheme, the device and the method utilize the fact that oxygen generated in the air separation device respectively enters the first gasification furnace and the second gasification furnace to serve as combustion improvers, the oxygen enters the first gasification furnace to fully react with raw materials such as water, coal and the like from the gasification raw material storage tank, a foundation is laid for the operation of the process gas treatment unit, and meanwhile, raw materials are provided for the second gasification furnace; before the furnace slag enters the second gasification furnace, the furnace slag is also subjected to drying and crushing pretreatment so as to achieve the characteristic of fully recovering residual carbon, carbon dioxide is used as a gasification agent in the second gasification furnace, and the residual carbon in the waste slag is completely reacted to obtain CO process gas; the gasification furnace has the advantages of simple structure, reasonable design, realization of complete reaction of residual carbon in waste residues by taking carbon dioxide as a gasification agent, effective recovery of residual carbon in the waste residues, avoidance of loss of raw material coal and improvement of CO process gas flow.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the upper diagram: 1. an air separation unit; 2. a nitrogen pipe network; 3. an oxygen pipe network; 4. a first gasification furnace; 5. a gasification raw material storage tank; 6. a process gas distribution station; 7. a carbon monoxide shift unit; 8. a first low temperature methanol washing device; 9. a slag collection tank; 10. a waste residue dryer; 11. a second gasification furnace; 12. a hydrogen pipe network; 13. a second low temperature methanol washing device; 14. a carbon monoxide pipe network; 15. a carbon dioxide pipe network; 16. a carbon dioxide user distribution station; 17. a carbon-free waste residue storage tank; 18. a pulverizer; 19. carbon monoxide purification device.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals refer to like parts throughout. For the sake of simplicity, only the parts related to the utility model are schematically shown in the drawings, and they do not represent the actual structure as a product.
As shown in fig. 1, the utility model relates to a production device for resource utilization of coal gasification waste residue, which comprises an air separation device 1 and a carbon dioxide pipe network 15, wherein the air separation device 1 is respectively arranged in a nitrogen pipe network 2 and an oxygen pipe network 3, and the oxygen pipe network 3 is respectively connected with gas phase inlets of a first gasification furnace 4 and a second gasification furnace 11; the solid inlet of the first gasification furnace 4 is connected with the gasification raw material storage tank 5, and the solid outlet of the first gasification furnace 4 is connected with the second gasification furnace 11 through a waste residue treatment unit; the gas phase outlet of the first gasification furnace 4 is connected with a process gas treatment unit; the carbon dioxide pipe network 15 is connected with a gas-phase inlet of the second gasification furnace 11; the gas phase outlet of the second gasification furnace 11 is connected with a process gas treatment unit. According to the utility model, an oxygen pipe network 3 provides oxygen for a first gasification furnace 4 and a second gasification furnace 11, a gasification raw material storage tank 5 provides water, coal and other raw materials for the first gasification furnace 4 to fully react with the oxygen to obtain process gas, and carbon dioxide is used as a gasification agent in the second gasification furnace 11 for further fully reacting waste residues to generate carbon monoxide; the process not only improves the utilization rate of coal, but also increases the yield of carbon monoxide; the process gas produced in the first gasification furnace 4 and the carbon monoxide produced in the second gasification furnace 11 are fed to a process gas treatment unit for subsequent treatment.
Further, the waste residue processing unit comprises a waste residue collecting tank 9 connected with the solid outlet of the first gasification furnace 4, and the waste residue collecting tank 9 is connected with the solid inlet of the second gasification furnace 11 through a waste residue dryer 10 and a pulverizer 18; the solid outlet of the second gasification furnace 11 is connected with a carbon-free waste residue storage tank 17. The waste residue treatment unit in the utility model is used for drying and crushing waste residue in a pretreatment process, the pretreatment process can meet the reaction requirement of the second gasification furnace 11 and can also improve the recovery rate of coal, particularly, waste residue generated in the first gasification furnace 4 is collected through the residue collection tank 9 and dried through the waste residue dryer 10, and the waste residue is crushed through the crusher on the basis of drying, the waste residue can be uniformly mixed under the condition of drying while the waste residue is crushed in the crushing process, the uniform mixing is a sufficient reaction in the second gasification furnace 11, and a foundation is laid for improving the reaction efficiency of the coal powder as far as possible.
Further, the process gas treatment unit comprises a process gas distribution station 6, the process gas distribution station 6 is connected with a first low-temperature methanol washing device 8 through a carbon monoxide conversion device 7, and the first low-temperature methanol washing device 8 is respectively connected with a hydrogen pipe network 12 and a carbon dioxide pipe network 15. The process gas distribution station 6 is used for supplying process gas to the first low-temperature methanol washing device 8 and the second low-temperature methanol washing device 13, converting a part of the process gas in the carbon monoxide conversion device 7, removing acid gas in the first low-temperature methanol washing device 8, then feeding hydrogen into the hydrogen pipe network 12, and generating carbon dioxide and feeding the carbon dioxide into the carbon dioxide pipe network 15 when the first low-temperature methanol washing device 8 is analyzed;
furthermore, a tee joint is arranged between the process gas distribution station 6 and the carbon monoxide conversion device 7, the third end of the tee joint is connected with a second low-temperature methanol washing device 13, and the second low-temperature methanol washing device 13 is respectively connected with a carbon monoxide pipe network 14 and a carbon dioxide pipe network 15; a carbon monoxide purification device 19 is arranged between the second low-temperature methanol washing device 13 and the carbon monoxide pipe network 14. A part of the process gas enters the second low-temperature methanol washing device 13 to remove acid gas therein, then enters the carbon monoxide purification device 19 to purify the carbon monoxide, and then enters the carbon monoxide pipe network 14, and carbon dioxide is generated when the second low-temperature methanol washing device 13 is analyzed and enters the carbon dioxide pipe network 15.
Further, said carbon dioxide pipe network 15 is connected to a carbon dioxide user distribution station 16. The carbon dioxide network 15 of the present invention is primarily used to supply carbon dioxide to the carbon dioxide user distribution station 16 and to deliver carbon dioxide to individual business users via the carbon dioxide user distribution station 16.
Further, the gas phase outlet of the second gasification furnace 11 is connected with the gas phase inlet of the process gas distribution station 6. With the above arrangement, the carbon monoxide generated in the second gasification furnace 11 can be distributed and reprocessed in the process gas distribution station 6.
Further, the first gasification furnace 4 and the second gasification furnace 11 are coal water slurry gasification furnaces or pulverized coal gasification furnaces.
A production method of a production device for resource utilization of coal gasification waste residue comprises the following steps:
step 1: nitrogen produced by the air separation device 1 enters a nitrogen pipe network 2, and oxygen produced by the air separation device enters an oxygen pipe network 3; the purity of the oxygen is more than 99.5%; the oxygen pipe network 3 supplies oxygen to the first gasification furnace 4 and the second gasification furnace 11, respectively;
step 2: the gasification raw material in the gasification raw material storage tank 5 enters the first gasification furnace 4 and fully reacts with the oxygen entering in the step 1 to obtain process gas, and the process gas enters the process gas distribution station 6;
and step 3: the slag after the full reaction in the first gasification furnace 4 enters a slag collecting tank 9, wherein the solid waste carbon content of the slag is 10-45%, and the water content is 15-40%;
and 4, step 4: the slag in the slag collecting tank 9 sequentially enters a waste slag dryer 10 and a crusher 18 for drying and crushing, the moisture content of the dried and crushed waste slag is less than 0.5%, and the particle size is less than 200 mu m;
and 5: the dried and crushed waste residue enters a second gasification furnace 11, fully reacts with oxygen from an oxygen pipe network 3 and carbon dioxide from a carbon dioxide pipe network 15 to generate carbon monoxide, and is sent to a process gas distribution station 6; the waste residue after the full reaction in the second gasification furnace 11 is carbon-free waste residue, and the carbon-free waste residue enters a carbon-free waste residue storage tank 17 through a solid outlet of the second gasification furnace 11; the carbon content of the carbon-free waste residue is less than 1 percent;
step 6: a part of process gas in the process gas distribution station 6 enters a carbon monoxide conversion device 7 to convert CO into hydrogen, enters a first low-temperature methanol washing device 8 to remove acid gas in the hydrogen, and then enters a hydrogen pipe network 12, and carbon dioxide resolved in the first low-temperature methanol washing device 8 enters a carbon dioxide pipe network 15;
and 7: the other part of the process gas in the process gas distribution station 6 is purified by a carbon monoxide purification device 19 after the acid gas in the process gas is removed in a second low-temperature methanol washing device 13, and then enters a carbon monoxide pipe network 14; the carbon dioxide resolved by the second low-temperature methanol washing device 13 enters a carbon dioxide pipe network 15;
and 8: the carbon dioxide pipe network 15 supplies carbon dioxide to the second gasification furnace 11 and the carbon dioxide user distribution station 16, respectively.
Further, the operation temperature of the first gasification furnace 4 in the step 2 is 1000-.
Further, the operation temperature of the second gasification furnace 11 in the step 5 is 850-1500 ℃.
In the utility model, the second gasification furnace 11 is used for burning the slag discharged from the first gasification furnace 4 again to achieve the purpose of improving the coal utilization rate, and simultaneously, in order to further improve the coal utilization rate and save the cost, the utility model further prepares carbon monoxide by a drying and crushing pretreatment device and matching with oxygen and carbon dioxide in a self system; the device and the process not only can improve the utilization rate of the coal and reduce the loss of the coal, but also can improve the amount of process gas; especially, the coal dust and the slag powder are uniformly mixed under the condition of drying through the pretreatment of the slag, and the uniform mixing lays a foundation for realizing sufficient reaction in the second gasification furnace 11 and improving the utilization rate of the coal dust.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected," "connecting," and the like are to be construed broadly, and may, for example, be fixedly connected, integrally connected, or detachably connected; or communication between the interior of the two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention according to specific situations. The above examples are merely illustrative of the feasible embodiments of the present invention and they are not intended to limit the scope of the present invention, and equivalent embodiments, modifications and alterations without departing from the technical spirit of the present invention are included in the scope of the present invention.
Claims (7)
1. The utility model provides a coal gasification waste residue utilization's apparatus for producing, includes air separation set (1), carbon dioxide pipe network (15), air separation set (1) respectively in nitrogen gas pipe network (2) and oxygen pipe network (3), its characterized in that: the oxygen pipe network (3) is respectively connected with the gas-phase inlets of the first gasification furnace (4) and the second gasification furnace (11);
the solid inlet of the first gasification furnace (4) is connected with the gasification raw material storage tank (5), and the solid outlet of the first gasification furnace (4) is connected with the second gasification furnace (11) through a waste residue treatment unit;
the gas phase outlet of the first gasification furnace (4) is connected with a process gas treatment unit;
the carbon dioxide pipe network (15) is connected with a gas-phase inlet of the second gasification furnace (11);
the gas phase outlet of the second gasification furnace (11) is connected with the process gas treatment unit.
2. The production device for recycling coal gasification waste residue according to claim 1, wherein: the waste residue processing unit comprises a waste residue collecting tank (9) connected with a solid outlet of the first gasification furnace (4), and the waste residue collecting tank (9) is connected with a solid inlet of the second gasification furnace (11) through a waste residue dryer (10) and a pulverizer (18);
the solid outlet of the second gasification furnace (11) is connected with a carbon-free waste residue storage tank (17).
3. The production device for recycling coal gasification waste residue according to claim 1, wherein: the process gas treatment unit comprises a process gas distribution station (6), the process gas distribution station (6) is connected with a first low-temperature methanol washing device (8) through a carbon monoxide conversion device (7), and the first low-temperature methanol washing device (8) is respectively connected with a hydrogen pipe network (12) and a carbon dioxide pipe network (15).
4. The production device for recycling coal gasification waste residue according to claim 3, wherein: a tee joint is arranged between the process gas distribution station (6) and the carbon monoxide conversion device (7), the third end of the tee joint is connected with a second low-temperature methanol washing device (13), and the second low-temperature methanol washing device (13) is respectively connected with a carbon monoxide pipe network (14) and a carbon dioxide pipe network (15);
a carbon monoxide purification device (19) is arranged between the second low-temperature methanol washing device (13) and the carbon monoxide pipe network (14).
5. The production device for recycling coal gasification waste residue according to claim 1, 3 or 4, characterized in that: the carbon dioxide network (15) is connected to a carbon dioxide user distribution station (16).
6. The production device for recycling coal gasification waste residue according to claim 1, wherein: and the gas-phase outlet of the second gasification furnace (11) is connected with the gas-phase inlet of the process gas distribution station (6).
7. The production device for recycling coal gasification waste residue according to claim 1, wherein: the first gasification furnace (4) and the second gasification furnace (11) are coal water slurry gasification furnaces or pulverized coal gasification furnaces.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122113194.4U CN215947205U (en) | 2021-09-02 | 2021-09-02 | Production device for resource utilization of coal gasification waste residues |
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| CN202122113194.4U CN215947205U (en) | 2021-09-02 | 2021-09-02 | Production device for resource utilization of coal gasification waste residues |
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