An igcc-based coal gasification pretreatment apparatus and method
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUANENG CLEAN ENERGY RES INST
- Filing Date
- 2024-11-28
- Publication Date
- 2026-05-29
Smart Images
Figure CN122104296A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of coal-fired power generation technology, and specifically to a coal gasification pretreatment device and method based on IGCC. Background Technology
[0002] IGCC, or Integrated Gasification Combined Cycle Power Generation System, is an advanced power system that combines coal gasification technology with a highly efficient combined cycle. An IGCC consists of two parts: a coal gasification and purification section and a gas-steam combined cycle power generation section. The main process of IGCC is as follows: coal, propelled by nitrogen, enters the gasifier and reacts with pure oxygen from the air separation system to produce syngas (primarily CO and H2). After purification treatment including dust removal, water washing, and desulfurization, the syngas is used to generate electricity in a gas turbine. The high-temperature exhaust gas from the gas turbine enters a waste heat boiler to heat feedwater, generating superheated steam to drive a steam turbine for power generation. The main purpose of coal pretreatment before gasification is to improve gasification efficiency and product quality. Pretreatment processes include crushing, screening, and coal washing, aiming to remove impurities and adjust the coal particle size and moisture content, thereby improving gasification efficiency and product quality.
[0003] The existing technology has the following shortcomings: When pre-processing raw coal, the existing pre-processing device cannot easily screen out stones or metal blocks in the raw coal, resulting in a large amount of metal powder and stone powder in the coal powder. This makes it impossible for the coal gasification equipment in the IGCC process to carry out stable coal gasification, which in turn affects the efficiency of coal power generation. Summary of the Invention
[0004] The purpose of this invention is to provide a coal gasification pretreatment device and method based on IGCC. The grinding plate can grind and pulverize the crushed raw coal, and the rotation of the fan can separate metal powder and stone powder from the coal powder, so that the coal gasification equipment can stably perform coal powder gasification operation, thereby solving the above-mentioned shortcomings in the technology.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a coal gasification pretreatment device based on IGCC, comprising a crushing mechanism, and further comprising:
[0006] The grinding mechanism, located at the bottom of the crushing mechanism, is used to grind the crushed raw coal.
[0007] The screening mechanism, located at the bottom of the grinding mechanism, is used to screen the ground raw coal.
[0008] The grinding mechanism includes a fixed housing, a placement plate is provided on the bottom inner side of the fixed housing, and a grinding plate is provided on the inner side of the placement plate;
[0009] The screening mechanism includes a screening box, with a rotating fan installed on the inner wall of one end of the screening box, and a coal powder conveyor belt installed on the inner wall of the end of the screening box away from the rotating fan.
[0010] Preferably, the crushing mechanism includes a crushing box, a feed hopper is fixedly installed on the top of the crushing box, and crushing rollers are rotatably installed on both sides inside the crushing box. One end of one of the crushing rollers is provided with a first motor, and rotating gears are fixedly sleeved on the outer side of the ends of the two crushing rollers away from the first motor.
[0011] Preferably, a feeding plate is fixedly installed on the bottom inner side of the crushing box, the top surface of the feeding plate is configured as a frustum-shaped structure, and a feeding hole is opened at the lowest point of the top surface of the feeding plate.
[0012] Preferably, the fixed housing is disposed at the bottom of the feeding plate, and an installation plate is fixedly installed on the inner side of the fixed housing. A second motor is fixedly installed on the top inner side of the installation plate, and a drive gear is fixedly installed at the output end of the second motor. A driven gear that meshes with the drive gear is disposed at one end of the inner wall of the installation plate. An electric push rod is fixedly installed on the inner side of the driven gear, and the output end of the electric push rod is fixedly connected to the top of the grinding plate.
[0013] Preferably, the placement plate is set as the bottom of the mounting plate, and fastening bolts are threaded into the inner walls of the four corners of the placement plate. The top of the fastening bolts is threaded to the inner walls of the four corners of the bottom of the fixed housing. A movable door panel is rotatably installed on one side of the fixed housing.
[0014] Preferably, the diameter of the grinding plate is larger than the radius of the inner wall of the placement plate, and the diameter of the placement plate is larger than the diameter of the mounting plate.
[0015] Preferably, a guide plate is fixedly installed at one end of the inner top of the screening box and at the bottom of the placement plate, and a waste conveyor belt is provided at the bottom of the inner wall of the screening box near the rotating fan.
[0016] Preferably, the inner wall of the screening box near the waste conveyor belt is provided with an installation groove. The inner wall of one end of the installation groove is fixedly connected to the ventilation plate, and a third motor is fixedly installed at the other end of the installation groove. The third motor is connected to the rotating fan through an output shaft drive.
[0017] Preferably, it also includes connecting bolts, with two sets provided, respectively located between the crushing mechanism and the grinding mechanism and between the grinding mechanism and the screening mechanism, for connecting and fixing the crushing mechanism, the grinding mechanism and the screening mechanism.
[0018] This invention includes a method of using an IGCC-based coal gasification pretreatment device, the method comprising the following steps:
[0019] S1. The mined raw coal is transported into the crushing box through the feed hopper. The raw coal is crushed by the relative rotation of two crushing rollers. Then, the crushed raw coal is fed into the grinding mechanism through the discharge hole.
[0020] S2. The crushed raw coal falls into the inner side of the placement plate, and the grinding plate can press and grind the crushed raw coal by working through the electric push rod.
[0021] S3. Through the meshing action between the driving gear and the driven gear, the grinding plate rotates along the inner wall of the placement plate by the operation of the second motor, so as to grind the raw coal at different positions on the inner wall of the placement plate.
[0022] S4. The ground coal powder falls into the screening box through the holes in the inner wall of the placement plate, while the guide plate guides the coal powder to the end of the screening box near the ventilation plate.
[0023] S5. The third motor drives the rotating fan to rotate, and the air force can be used to screen the coal powder falling into the screening box.
[0024] S6. The gravity of pulverized coal is less than that of metal powder and stone powder, so the pulverized coal is blown to the top of the pulverized coal conveyor belt by the wind, while the metal powder and stone powder fall to the top of the waste conveyor belt under their own gravity.
[0025] S7. The pulverized coal conveyor belt transports pulverized coal to the coal gasification equipment in the IGCC process, while the waste conveyor belt transports metal powder and stone powder to other processes.
[0026] The technical effects and advantages provided by the present invention in the above technical solution are as follows:
[0027] 1. The crushing rollers can initially crush the raw coal. Then, the electric push rods can grind the crushed raw coal into a grinding plate. The rotation of the driven gears can fully grind the raw coal at different positions on the inner side of the plate. Then, the rotating fan can screen the coal powder falling into the screening box. The coal powder can fall onto the coal powder conveyor belt, while metal powder and stone powder can fall onto the waste conveyor belt. This can easily separate metal and stone from the raw coal, ensuring the cleanliness of the coal powder and thus improving the quality and efficiency of coal gasification.
[0028] 2. The movable door panel allows workers to easily inspect and disassemble the grinding plate. The fastening bolts passing through the placement plate and threadedly connecting to the inner wall of the fixed outer casing facilitate maintenance and replacement. Simultaneously, the diversion plate guides the ground coal powder, preventing impurities from falling directly onto the coal powder conveyor belt, thus ensuring stable screening of the coal powder by the screening mechanism. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.
[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention.
[0031] Figure 2 This is a front vertical sectional view of the present invention.
[0032] Figure 3 This is an exploded view of the three-dimensional structure of the crushing mechanism of the present invention.
[0033] Figure 4 This is an exploded view of the three-dimensional structure of the grinding mechanism of the present invention.
[0034] Figure 5 This is an exploded view of the three-dimensional structure of the screening mechanism of the present invention.
[0035] Explanation of reference numerals in the attached figures:
[0036] 1. Crushing mechanism; 101. Crushing box; 102. Feed hopper; 103. Crushing roller; 104. First motor; 105. Rotating gear; 106. Discharge plate; 107. Discharge hole;
[0037] 2. Grinding mechanism; 201. Fixed outer shell; 202. Movable door panel; 203. Placement plate; 204. Fastening bolts; 205. Mounting plate; 206. Second motor; 207. Drive gear; 208. Driven gear; 209. Electric push rod; 210. Grinding plate;
[0038] 3. Screening mechanism; 301. Screening box; 302. Diversion plate; 303. Mounting groove; 304. Ventilation plate; 305. Third motor; 306. Rotating fan; 307. Pulverized coal conveyor belt; 308. Waste conveyor belt;
[0039] 4. Connecting bolts. Detailed Implementation
[0040] This invention provides, for example Figure 1 The illustrated IGCC-based coal gasification pretreatment device includes a crushing mechanism 1, and further includes:
[0041] Grinding mechanism 2 is located at the bottom of crushing mechanism 1 and is used to grind the crushed raw coal.
[0042] Screening mechanism 3 is located at the bottom of grinding mechanism 2 and is used to screen the ground raw coal;
[0043] Two sets of connecting bolts 4 are provided, one between the crushing mechanism 1 and the grinding mechanism 2 and the other between the grinding mechanism 2 and the screening mechanism 3, for connecting and fixing the crushing mechanism 1, the grinding mechanism 2 and the screening mechanism 3.
[0044] In order to fully grind the crushed raw coal, such as Figure 1-2 and Figure 4 As shown, the grinding mechanism 2 includes a fixed housing 201, a placement plate 203 is provided at the bottom of the inner side of the fixed housing 201, an installation plate 205 is fixedly installed inside the fixed housing 201, a driven gear 208 is provided at one end of the inner wall of the installation plate 205, an electric push rod 209 is fixedly installed inside the driven gear 208, and a grinding plate 210 is fixedly installed at the output end of the electric push rod 209. The operation of the electric push rod 209 enables the grinding plate 210 to grind the raw coal falling into the placement plate 203. At the same time, the operation of the second motor 206, through the meshing action between the driving gear 207 and the driven gear 208, enables the grinding plate 210 to rotate along the inner wall of the placement plate 203, thereby fully grinding the raw coal.
[0045] To facilitate the screening of ground coal powder, such as Figure 1-2 and Figure 5 As shown, the screening mechanism 3 includes a screening box 301. A ventilation plate 304 is provided on the inner wall of one end of the screening box 301, and a rotating fan 306 is provided on the outer side of the ventilation plate 304. A coal powder conveyor belt 307 is provided on the inner wall of the end of the screening box 301 away from the rotating fan 306, and a waste conveyor belt 308 is provided at the bottom of the inner wall of the end of the screening box 301 close to the rotating fan 306. When the rotating fan 306 is working, it can screen the coal powder falling into the screening box 301, so that the coal powder can fall onto the coal powder conveyor belt 307 under the action of wind. At the same time, metal powder and stone powder fall naturally onto the waste conveyor belt 308, which can facilitate the screening of coal powder and ensure the cleanliness of coal powder.
[0046] To facilitate the crushing and feeding of raw coal, such as Figure 1-3As shown, the crushing mechanism 1 includes a crushing box 101. A feed hopper 102 is fixedly installed on the top of the crushing box 101. Crushing rollers 103 are rotatably installed on both sides inside the crushing box 101. A first motor 104 is provided at one end of one of the crushing rollers 103. Rotating gears 105 are fixedly sleeved on the outer side of the ends of the two crushing rollers 103 away from the first motor 104. A feeding plate 106 is fixedly installed at the bottom inside the crushing box 101. The top surface of the feeding plate 106 is set as a frustum-shaped structure. A feeding hole 107 is opened at the lowest point of the top surface of the feeding plate 106. The two crushing rollers 103 can crush the raw coal by rotating relative to each other. The crushed raw coal can be guided by the inclined surface of the top of the feeding plate 106 and then fall into the grinding mechanism 2 through the feeding hole 107.
[0047] In order to fully grind the crushed raw coal, such as Figure 2 and Figure 4 As shown, a second motor 206 is fixedly installed on the top inner side of the mounting plate 205. A drive gear 207 is fixedly installed at the output end of the second motor 206. The drive gear 207 meshes with the driven gear 208. The diameter of the grinding plate 210 is larger than the radius of the inner wall of the placement plate 203. The diameter of the placement plate 203 is larger than the diameter of the mounting plate 205. The second motor 206 operates through the meshing action between the drive gear 207 and the driven gear 208, allowing the grinding plate 210 to rotate along the inner wall of the placement plate 203, so that the grinding plate 210 can fully grind the raw coal inside the placement plate 203.
[0048] To facilitate the installation and replacement of the placement plate 203, such as Figure 2 and Figure 4 As shown, fastening bolts 204 are threaded into the inner walls of the four corners of the placement plate 203. The top of the fastening bolts 204 is threaded to the inner walls of the four corners of the bottom of the fixed housing 201. A movable door panel 202 is rotatably installed on one side of the fixed housing 201. The fastening bolts 204 pass through the placement plate 203 and are threaded to the inner wall of the fixed housing 201, allowing the staff to easily install and replace the placement plate 203. At the same time, the movable door panel 202 allows the staff to inspect and replace the grinding plate 210.
[0049] To facilitate the screening of pulverized coal, such as Figure 2 and Figure 5As shown, an installation groove 303 is provided on the inner wall of the screening box 301 near the waste conveyor belt 308. The inner wall of one end of the installation groove 303 is fixedly connected to the ventilation plate 304, and a third motor 305 is fixedly installed on the other end of the installation groove 303. The third motor 305 is connected to the rotating fan 306 through the output shaft. The installation groove 303 can install and fix the ventilation plate 304 and the third motor 305. When the third motor 305 works, the rotating fan 306 rotates. Through the ventilation effect of the ventilation plate 304, the air force can screen the coal powder falling into the screening box 301, so that the coal powder can fall onto the coal powder conveyor belt 307, while the metal powder and stone powder can fall onto the waste conveyor belt 308.
[0050] This invention includes a method of using an IGCC-based coal gasification pretreatment device, the method comprising the following steps:
[0051] S1. The mined raw coal is transported to the crushing box 101 through the feed hopper 102. The raw coal is crushed by the relative rotation of two crushing rollers 103. Then, the crushed raw coal is fed into the grinding mechanism 2 through the discharge hole 107. The first motor 104 works and the meshing action between the two rotating gears 105 causes the crushing rollers 103 to rotate relative to each other, which can fully crush the raw coal. Then, the raw coal can be guided by the frustum-shaped discharge plate 106. The crushed raw coal can fall into the grinding mechanism 2 and onto the outside of the mounting plate 205, so that it can fall into the placement plate 203.
[0052] S2. The crushed raw coal falls into the inner side of the placement plate 203. The electric push rod 209 works to make the grinding plate 210 press and grind the crushed raw coal. The electric push rod 209 can adjust the height of the grinding plate 210 so that the crushed raw coal can stably enter the inner side of the placement plate 203. At the same time, the fastening bolt 204 passes through the inside of the placement plate 203 and is threadedly connected to the inner wall of the fixed shell 201, which can facilitate the installation and replacement of the placement plate 203 by the staff.
[0053] S3. The second motor 206 operates, and through the meshing action between the drive gear 207 and the driven gear 208, the grinding plate 210 rotates along the inner wall of the placement plate 203, thus grinding the raw coal at different positions on the inner wall of the placement plate 203. The second motor 206 operates, causing the drive gear 207 to rotate. Through the meshing action between the drive gear 207 and the driven gear 208, the driven gear 208 rotates along the inner wall of the mounting plate 205, which in turn drives the grinding plate 210 to rotate along the inner wall of the placement plate 203, thereby fully grinding the crushed raw coal.
[0054] S4. The ground coal powder falls into the screening box 301 through the holes in the inner wall of the placement plate 203. At the same time, the guide plate 302 guides the coal powder to the end of the screening box 301 near the ventilation plate 304. The guide plate 302 can guide the ground coal powder, which can prevent the coal powder from falling directly to the top of the coal powder conveyor belt 307 through the bottom inner wall of the placement plate 203. This ensures that the screening mechanism 3 can screen the coal powder stably.
[0055] S5. The third motor 305 operates to make the rotating fan 306 rotate, and the air force can be used to screen the coal powder falling into the screening box 301. The third motor 305 operates to make the rotating fan 306 rotate, and the ventilation plate 304 provides ventilation, so the air force can be used to screen the coal powder falling into the screening box 301.
[0056] S6. The gravity of pulverized coal is less than that of metal powder and stone powder, so the pulverized coal is blown to the top of the pulverized coal conveyor belt 307 by the wind, while the metal powder and stone powder fall to the top of the waste conveyor belt 308 under their own gravity. The pulverized coal drifts to the top of the pulverized coal conveyor belt 307 under the wind, while the metal powder and stone powder fall naturally to the top of the waste conveyor belt 308. This can achieve the screening of pulverized coal, avoid the presence of a large number of impurities inside the pulverized coal, and prevent impurities from affecting the coal gasification work in the IGCC process.
[0057] S7, the pulverized coal conveyor belt 307 transports pulverized coal to the coal gasification equipment in the IGCC process, and the waste conveyor belt 308 transports metal powder and stone powder to other processes. The coal gasification equipment in the IGCC process can perform gasification on the pulverized coal conveyor belt 307, thereby realizing power generation. At the same time, the waste conveyor belt 308 can transport metal powder and stone powder to the waste recycling process.
[0058] As can be seen from the above, compared with traditional coal gasification pretreatment devices, this invention can initially crush the raw coal through the crushing mechanism 1. Then, the height of the grinding plate 210 can be adjusted by the electric push rod 209, so that it can grind the crushed raw coal. Then, through the operation of the second motor 206, the grinding plate 210 can rotate along the inner wall of the placement plate 203 through the meshing action between the driving gear 207 and the driven gear 208, which can fully grind the raw coal, making the coal powder processing more thorough. Then, the coal powder can be guided by the diversion plate 302, which can avoid... The coal powder falls directly onto the coal powder conveyor belt 307, allowing the screening mechanism 3 to stably screen the coal powder and avoid any omissions. Then, the third motor 305 operates, causing the rotating fan 306 to rotate. Under the action of the wind, the coal powder can fall to the top of the coal powder conveyor belt 307, while the metal powder and stone powder naturally fall to the top of the waste conveyor belt 308. This facilitates the screening of the coal powder and prevents residual metal powder and stone powder from affecting subsequent coal gasification work, thus ensuring the quality and efficiency of the IGCC coal gasification process.
[0059] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A coal gasification pretreatment device based on IGCC, comprising a crushing mechanism (1), characterized in that, Also includes: The grinding mechanism (2) is located at the bottom of the crushing mechanism (1) and is used to grind the crushed raw coal. The screening mechanism (3) is located at the bottom of the grinding mechanism (2) and is used to screen the ground raw coal. The grinding mechanism (2) includes a fixed housing (201), a placement plate (203) is provided on the bottom inner side of the fixed housing (201), and a grinding plate (210) is provided on the inner side of the placement plate (203); The screening mechanism (3) includes a screening box (301), a rotating fan (306) is provided on the inner wall of one end of the screening box (301), and a coal powder conveyor belt (307) is provided on the inner wall of the end of the screening box (301) away from the rotating fan (306).
2. The coal gasification pretreatment device based on IGCC according to claim 1, characterized in that: The crushing mechanism (1) includes a crushing box (101), a feed hopper (102) is fixedly installed on the top of the crushing box (101), and crushing rollers (103) are rotatably installed on both sides inside the crushing box (101). One end of one of the crushing rollers (103) is provided with a first motor (104), and rotating gears (105) are fixedly sleeved on the outer side of the ends of the two crushing rollers (103) away from the first motor (104).
3. The coal gasification pretreatment device based on IGCC according to claim 2, characterized in that: A feeding plate (106) is fixedly installed on the bottom inner side of the crushing box (101). The top surface of the feeding plate (106) is set as a frustum-shaped structure, and a feeding hole (107) is opened at the lowest point of the top surface of the feeding plate (106).
4. The coal gasification pretreatment device based on IGCC according to claim 3, characterized in that: The fixed housing (201) is disposed at the bottom of the feed plate (106). An installation plate (205) is fixedly installed on the inner side of the fixed housing (201). A second motor (206) is fixedly installed on the top inner side of the installation plate (205). A drive gear (207) is fixedly installed at the output end of the second motor (206). One end of the inner wall of the mounting plate (205) is provided with a driven gear (208) that meshes with the driving gear (207). An electric push rod (209) is fixedly installed on the inner side of the driven gear (208), and the output end of the electric push rod (209) is fixedly connected to the top of the grinding plate (210).
5. A coal gasification pretreatment device based on IGCC according to claim 4, characterized in that: The placement plate (203) is set as the bottom of the mounting plate (205). The inner walls of the four corners of the placement plate (203) are threaded with fastening bolts (204). The top of the fastening bolts (204) is threaded to the inner walls of the four corners of the bottom of the fixed shell (201). A movable door panel (202) is rotatably installed on one side of the fixed shell (201).
6. The coal gasification pretreatment device based on IGCC according to claim 4, characterized in that: The diameter of the grinding plate (210) is larger than the radius of the inner wall of the placement plate (203), and the diameter of the placement plate (203) is larger than the diameter of the mounting plate (205).
7. The coal gasification pretreatment device based on IGCC according to claim 1, characterized in that: A flow guide plate (302) is fixedly installed at one end of the inner top of the screening box (301) and at the bottom of the placement plate (203). A waste conveyor belt (308) is provided at the bottom of the inner wall of the screening box (301) near the rotating fan (306).
8. A coal gasification pretreatment device based on IGCC according to claim 7, characterized in that: The screening box (301) has an installation groove (303) on the inner wall of one end near the waste conveyor belt (308). The inner wall of one end of the installation groove (303) is fixedly connected to the ventilation plate (304). A third motor (305) is fixedly installed at the other end of the installation groove (303). The third motor (305) is connected to the rotating fan (306) through the output shaft drive.
9. A coal gasification pretreatment device based on IGCC according to claim 1, characterized in that: It also includes connecting bolts (4), which are provided in two sets, respectively between the crushing mechanism (1) and the grinding mechanism (2) and between the grinding mechanism (2) and the screening mechanism (3), for connecting and fixing the crushing mechanism (1), the grinding mechanism (2) and the screening mechanism (3).
10. The method of using the IGCC-based coal gasification pretreatment device according to any one of claims 1-9, characterized in that, The method includes the following steps: S1. The mined raw coal is transported to the crushing box (101) through the feed hopper (102). The raw coal is crushed by the relative rotation of two crushing rollers (103). Then, the crushed raw coal is fed into the grinding mechanism (2) through the discharge hole (107). S2. The crushed raw coal falls into the inner side of the placement plate (203), and the grinding plate (210) presses and grinds the crushed raw coal by the operation of the electric push rod (209). S3. Through the operation of the second motor (206), the grinding plate (210) rotates along the inner wall of the placement plate (203) via the meshing action between the driving gear (207) and the driven gear (208), so that it grinds the raw coal at different positions on the inner wall of the placement plate (203). S4. The ground coal powder falls into the screening box (301) through the holes in the inner wall of the placement plate (203), while the guide plate (302) guides the coal powder to the end of the screening box (301) near the ventilation plate (304). S5. The third motor (305) is used to make the rotating fan (306) rotate, and the coal powder falling into the screening box (301) is screened by wind power. S6. The gravity of coal powder is less than that of metal powder and stone powder, so the coal powder is blown to the top of the coal powder conveyor belt (307) by the wind, while the metal powder and stone powder fall to the top of the waste conveyor belt (308) under their own gravity. S7, the pulverized coal conveyor belt (307) transports pulverized coal to the coal gasification equipment in the IGCC process, and the waste conveyor belt (308) transports metal powder and stone powder to other processes.