Processing method of coal powder gasification furnace slag discharge port and anti-blocking structure thereof

Abstract

The application discloses a processing method of a slag discharge port of a pulverized coal gasifier and a blocking prevention structure thereof, and comprises the following steps: step A, cutting the inner wall of the slag discharge port through a cutting machine; step B, welding a nickel-based steel plate smaller than the cutting object on the inner wall of the slag discharge port to form a sealing layer of the inner wall of the slag discharge port, so that the inner diameter of the slag discharge port is expanded to 1100mm-1200mm; and step C, polishing the surface of the nickel-based steel plate to keep smooth; the inner diameter of the slag discharge port is expanded by cutting the inner wall of the slag discharge port, so that the risk of slag blocking during the slag discharge of the gasifier is avoided, and the stable operation of the gasifier is ensured; the device can be automatically dredged by being provided with a mounting ring block, a first protruding block, a dredging assembly, a transmission assembly and a driving assembly, so that the good slag discharge effect is ensured, the structure is simple, the operation is stable, and the labor cost is reduced.

Description

Technical Field

[0001] This invention specifically relates to a processing method for the slag discharge port of a pulverized coal gasifier and its anti-clogging structure. Background Technology

[0002] A pulverized coal gasifier is a type of furnace that reacts pulverized coal with gases such as oxygen and steam under high-temperature conditions to convert it into syngas. Its working principle primarily involves converting the organic matter in coal into gaseous fuel through the combustion and gasification process of pulverized coal, thereby achieving efficient utilization of coal.

[0003] The inner diameter of the ash discharge port in the reaction section of existing pulverized coal gasifiers is generally 1000mm. When burning coal of different qualities, inferior coal can easily cause blockage of the ash discharge port, affecting the stability of smooth ash discharge. In addition, when ash blockage occurs, it is usually necessary to shut down the machine for maintenance and manually clear the blockage. Manual clearing is a large workload and takes 7-10 days, which is quite time-consuming. Therefore, we propose a processing method for the ash discharge port of pulverized coal gasifiers and its anti-blocking structure. Summary of the Invention

[0004] The purpose of this invention is to provide a processing method for the ash discharge port of a pulverized coal gasifier and its anti-clogging structure, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a processing method for the ash discharge port of a pulverized coal gasifier, comprising the following steps:

[0006] Step A: Use a cutting machine to remove the inner wall of the slag discharge port;

[0007] Step B: Weld a nickel-based steel plate smaller than the cut-off material to the inner wall of the slag discharge port to form a sealing layer on the inner wall of the slag discharge port, thereby expanding the inner diameter of the slag discharge port to 1100mm-1200mm.

[0008] Step C: Grind the surface of the nickel-based steel plate to keep it smooth.

[0009] Preferably, the furnace body has a slag discharge port at the lower end of its inner side, and an installation ring block is fixed on the lower surface of the slag discharge port;

[0010] The first protrusion is located on the inner wall of the mounting ring block;

[0011] The unblocking component is slidably installed inside the mounting ring block, and the inner wall of the unblocking component has a second protrusion facing the opposite direction to the first protrusion;

[0012] A transmission assembly is rotatably mounted on the lower end of the outer surface of the mounting ring block, and the transmission assembly cooperates with the unblocking assembly;

[0013] A drive assembly is disposed on the outer surface of the furnace body, and the output end of the drive assembly cooperates with the transmission assembly to drive the unblocking assembly to move up and down.

[0014] Preferably, the unblocking component includes an unblocking ring block, a slider, a second protrusion, and an unblocking plate. The slider is slidably installed on the inner side of the mounting ring block, and one end of the slider has an unblocking plate flush with the inner wall of the mounting ring block. The second protrusion is fixed to the unblocking plate. The other end of the slider has an unblocking ring block fitted onto the outer surface of the mounting ring block, and the lower surface of the unblocking ring block is fixed with the second protrusion.

[0015] Preferably, the unblocking plate is rectangular, and multiple unblocking plates are evenly distributed along the circumference of the unblocking ring block.

[0016] Preferably, the transmission assembly includes a transmission ring block, teeth, and a first convex plate. The transmission ring block is rotatably mounted on the lower end of the outer surface of the mounting ring block, and the upper surface of the transmission ring block has a first convex plate that cooperates with the second convex plate. The outer surface of the transmission ring block is provided with teeth.

[0017] Preferably, the second convex plate is "D" shaped, and the first convex plate and the second convex plate have the same shape and structure.

[0018] Preferably, a flow channel is provided on the inner side of the unblocking ring block, and an inlet and outlet pipe communicating with the inside of the flow channel is provided on the outer surface of the unblocking ring block.

[0019] Preferably, the drive assembly includes a motor, a drive shaft, and a worm gear. The motor is fixed to the outer surface of the furnace body by a bracket. The output end of the motor has a drive shaft, and one end of the drive shaft is provided with a worm gear that cooperates with the drive assembly.

[0020] Preferably, the first protrusion is V-shaped.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) By cutting off the inner wall of the slag discharge port, the inner diameter of the slag discharge port is enlarged, avoiding the risk of slag blockage during slag discharge of the gasifier, ensuring the stable operation of the gasifier. The enlargement of the slag discharge port ensures the increase of oxygen load inside the gasifier, improves the adaptability to inferior coal types, and reduces the furnace temperature of the gasifier.

[0023] (2) By setting up an installation ring block, a first protrusion, a dredging component, a transmission component and a drive component, it is convenient to perform power dredging at the slag discharge port, so as to avoid the slag discharge port from being blocked due to accidents during long-term operation, which would require manual dredging. The slag discharge port has a high temperature and poses a safety risk. This device can perform automatic dredging to ensure a good slag discharge effect. It has a simple structure, stable operation, reduces labor costs, and increases the practicality of the device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic cross-sectional view of the mounting ring block of the present invention;

[0026] Figure 3 This is a schematic diagram of the unblocking plate structure of the present invention;

[0027] Figure 4 This is a schematic cross-sectional view of the unblocking ring block structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the transmission ring block structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the transmission shaft structure of the present invention.

[0030] In the diagram: 1. Furnace body; 2. Slag discharge port; 201. Mounting ring block; 3. First protrusion; 4. Unblocking assembly; 401. Unblocking ring block; 402. Slider; 403. Second protrusion plate; 404. Unblocking plate; 405. Flow channel; 406. Inlet and outlet pipes; 5. Second protrusion; 6. Transmission assembly; 601. Transmission ring block; 602. Gear; 603. First protrusion plate; 801. Motor; 802. Transmission shaft; 803. Worm gear. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-6 The present invention provides a technical solution: a processing method for the ash discharge port of a pulverized coal gasifier, comprising the following steps:

[0033] Step A: Cut off the inner wall of the slag discharge port 2 using a cutting machine;

[0034] Step B: Weld a nickel-based steel plate smaller than the cut-off material to the inner wall of the slag discharge port 2 to form a sealing layer on the inner wall of the slag discharge port 2, thereby expanding the inner diameter of the slag discharge port 2 to 1100mm-1200mm.

[0035] Step C: Grind the surface of the nickel-based steel plate to keep it smooth.

[0036] This technology allows for the enlargement of the ash discharge port 2 of the gasifier, increasing the diameter from φ1000mm to φ1138mm. This enlargement effectively improves ash discharge port blockage, reduces the risk of blockage, and makes the gasifier's operation more stable. The enlarged diameter significantly increases the gasifier's oxygen load, increasing it by 8% compared to before the enlargement. This results in a 15.8% increase in syngas output at the same oxygen load. The enlarged diameter also reduces the risk of blockage and lowers the gasifier temperature, leading to a decrease in CO2 content in the syngas and a 3.2% increase in CO+H2 content in the effective gas components. Compared to the original technology, the effective gas output per unit oxygen load increases by 8.6%, making the gasifier more economical to operate. Furthermore, this new technology increases the adaptability of the pulverized coal gasifier to low-quality coal types. The original technology required a coal ash content of 15.23% for the gasifier feed; after implementing this new technology, the coal ash content can reach as high as 21%.

[0037] A clog-prevention structure for the ash discharge port of a pulverized coal gasifier, comprising:

[0038] Furnace body 1, with a slag discharge port 2 at the lower inner side of furnace body 1, and an installation ring block 201 fixed on the lower surface of slag discharge port 2;

[0039] The first protrusion 3 is disposed on the inner wall of the mounting ring block 201;

[0040] The unblocking component 4 is slidably installed inside the mounting ring block 201, and the inner wall of the unblocking component 4 has a second protrusion 5 facing the opposite direction to the first protrusion 3;

[0041] The first protrusion 3 and the second protrusion 5 facilitate the displacement of adjacent coal slag, thereby clearing the blockage.

[0042] The transmission component 6 is rotatably mounted on the lower end of the outer surface of the mounting ring block 201, and the transmission component 6 cooperates with the unblocking component 4;

[0043] This facilitates the transmission of power to the unblocking component 4, thereby driving it to move up and down.

[0044] The drive assembly is located on the outer surface of the furnace body 1, and its output end cooperates with the transmission assembly 6 to drive the unblocking assembly 4 to move up and down.

[0045] Preferably, the unblocking component 4 includes an unblocking ring block 401, a slider 402, a second protrusion 403, and an unblocking plate 404. The slider 402 is slidably installed on the inner side of the mounting ring block 201, and one end of the slider 402 has an unblocking plate 404 flush with the inner wall of the mounting ring block 201. The second protrusion 5 is fixed to the unblocking plate 404. The other end of the slider 402 has an unblocking ring block 401 fitted onto the outer surface of the mounting ring block 201, and the lower surface of the unblocking ring block 401 is fixed with the second protrusion 403.

[0046] The ring block 401 facilitates the simultaneous up-and-down movement of multiple unblocking plates 404 to clear blockages at the two slag discharge ports.

[0047] Preferably, the unblocking plate 404 is rectangular, and multiple unblocking plates 404 are evenly distributed around the unblocking ring block 401.

[0048] This facilitates better dredging.

[0049] Preferably, the transmission assembly 6 includes a transmission ring block 601, teeth 602, and a first convex plate 603. The transmission ring block 601 is rotatably mounted on the lower end of the outer surface of the mounting ring block 201, and the upper surface of the transmission ring block 601 has a first convex plate 603 that cooperates with the second convex plate 403. The outer surface of the transmission ring block 601 is provided with teeth 602, which facilitates the rotation of the transmission ring block 601, thereby driving the first convex plate 603 on it to move.

[0050] Preferably, the second convex plate 403 is "D" shaped, and the first convex plate 603 has the same shape and structure as the second convex plate 403, which facilitates the up-and-down movement of the unblocking ring block 401.

[0051] Preferably, a flow channel 405 is provided on the inner side of the dredging ring block 401, and an inlet and outlet pipe 406 connected to the inside of the flow channel 405 is provided on the outer surface of the dredging ring block 401 to facilitate water injection, reduce the impact of high temperature at the slag discharge port 2 on the device, and at the same time, heat energy can be recovered and reused.

[0052] Preferably, the drive assembly includes a motor 801, a drive shaft 802, and a worm gear 803. The motor 801 is fixed to the outer surface of the furnace body 1 by a bracket. The output end of the motor 801 has a drive shaft 802. The drive shaft 802 and the furnace body 1 are sealed by a sealed bearing and a sealing packing to achieve a seal at the transmission point. One end of the drive shaft 802 is provided with a worm gear 803 that cooperates with the transmission assembly 6 to facilitate the rotation of the transmission ring block 601.

[0053] Preferably, the first protrusion 3 is "V" shaped, which facilitates the movement of coal slag for unblocking.

[0054] The working principle and usage process of this invention are as follows: During use, the slag discharge port 2 is cut, and a new sealing layer is welded to enlarge the inner diameter of the slag discharge port 2, thereby improving the slag discharge effect and reducing the risk of slag blockage. Furthermore, if slag blockage occurs at the slag discharge port 2, the motor 801 is located outside the furnace body 1, away from the slag discharge port 2, and is fixed by a bracket. The motor 801 drives the worm gear 803 to rotate via the transmission shaft 802. The worm gear 803 meshes with the teeth 602 to drive the first convex plate 603 to rotate. The transmission ring block 601 on the first convex plate 603 and the second convex plate 403... The two parts collide to make the unblocking ring block 401 rise, which in turn drives the unblocking plate 404 to rise. The unblocking plate 404 and the inner wall of the mounting ring block 201 are misaligned to push the blockage. Similarly, when the first convex plate 603 and the second convex plate 403 are misaligned, the unblocking plate 404 and the inner wall of the mounting ring block 201 are misaligned again. Through the mutual interlacing movement, the blockage is unblocked, ensuring a good slag discharge effect. In addition, cold water can be injected into the inside of the flow channel 405 through the inlet and outlet pipes 406 to cool the slag discharge port. At the same time, the heat energy of the cold water after the return heat absorption can be utilized.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clog-prevention structure for the ash discharge port of a pulverized coal gasifier, characterized in that, include: Furnace body (1), the lower end of the inner side of the furnace body (1) is provided with a slag discharge port (2), and the lower surface of the slag discharge port (2) is fixed with an installation ring block (201). The first protrusion (3) is disposed on the inner wall of the mounting ring block (201); The unblocking component (4) is slidably installed inside the mounting ring block (201), and the inner wall of the unblocking component (4) has a second protrusion (5) facing the opposite direction to the first protrusion (3). The transmission assembly (6) is rotatably mounted on the lower end of the outer surface of the mounting ring block (201), and the transmission assembly (6) cooperates with the unblocking assembly (4); A drive assembly is disposed on the outer surface of the furnace body (1), and the output end of the drive assembly cooperates with the transmission assembly (6) to drive the unblocking assembly (4) to move up and down; The unblocking component (4) includes an unblocking ring block (401), a slider (402), a second protrusion plate (403), and an unblocking plate (404). The slider (402) is slidably installed on the inner side of the mounting ring block (201), and one end of the slider (402) has an unblocking plate (404) flush with the inner wall of the mounting ring block (201). The second protrusion (5) is fixed to the unblocking plate (404). The other end of the slider (402) has an unblocking ring block (401) fitted onto the outer surface of the mounting ring block (201), and the lower surface of the unblocking ring block (401) is fixed with the second protrusion plate (403). The unblocking plate (404) is rectangular, and multiple unblocking plates (404) are evenly distributed around the unblocking ring block (401); The transmission assembly (6) includes a transmission ring block (601), teeth (602) and a first convex plate (603). The transmission ring block (601) is rotatably mounted on the lower end of the outer surface of the mounting ring block (201), and the upper surface of the transmission ring block (601) has a first convex plate (603) that cooperates with the second convex plate (403). The outer surface of the transmission ring block (601) is provided with teeth (602). The second convex plate (403) is "D" shaped, and the first convex plate (603) and the second convex plate (403) have the same shape and structure.

2. The anti-clogging structure for the ash discharge port of a pulverized coal gasifier according to claim 1, characterized in that: The inner side of the unblocking ring block (401) is provided with a flow channel (405), and the outer surface of the unblocking ring block (401) is provided with an inlet and outlet pipe (406) that communicates with the inside of the flow channel (405).

3. The anti-clogging structure for the ash discharge port of a pulverized coal gasifier according to claim 1, characterized in that: The drive assembly includes a motor (801), a transmission shaft (802), and a worm gear (803). The motor (801) is fixed to the outer surface of the furnace body (1) by a bracket. The output end of the motor (801) has a transmission shaft (802), and one end of the transmission shaft (802) is provided with a worm gear (803) that cooperates with the transmission assembly (6).

4. The anti-clogging structure for the ash discharge port of a pulverized coal gasifier according to claim 1, characterized in that: The first protrusion (3) is V-shaped.

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