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

Abstract

The invention discloses a processing method of a slag discharge port of a pulverized coal gasification furnace and an anti-blocking structure of the slag discharge port. The processing method comprises the following steps: step A, cutting off the inner wall of the slag discharge port through a cutting machine; b, a nickel-based steel plate smaller than a cut object is welded to the inner wall of the slag discharging opening to form a sealing layer for the inner wall of the slag discharging opening, so that the inner diameter of the slag discharging opening is enlarged to 1100-1200 mm; c, the surface of the nickel-based steel plate is polished to be kept smooth; by cutting off the inner wall of the slag discharging opening and enlarging the inner diameter of the slag discharging opening, the risk of slag blocking during slag discharging of the gasification furnace is avoided, stable operation of the gasification furnace is guaranteed, by arranging an installation ring block, a first protruding block, a dredging assembly, a transmission assembly and a driving assembly, the device can conduct automatic dredging so as to guarantee the good slag discharging effect, the structure is simple, operation is stable, and practicability is high. And the manual labor cost is reduced.

Description

Technical Field

[0001] The invention specifically relates to a processing method for a slag discharge port of a pulverized coal gasification furnace and an anti-blocking structure thereof. Background Art

[0002] Pulverized coal gasifier is a furnace type equipment that converts pulverized coal into synthesis gas by reacting it with oxygen, water vapor and other gases under high temperature conditions. Its working principle is mainly to convert organic matter in coal into gas fuel through the combustion and gasification process of pulverized coal, thereby achieving efficient utilization of coal.

[0003] The inner diameter of the slag discharge port of the reaction section of the existing pulverized coal gasification furnace is generally 1000mm. When burning coal of different qualities, inferior coal is easy to cause blockage in the slag discharge port, affecting the stability of smooth slag discharge. In addition, when slag blockage occurs, it is usually necessary to shut down for maintenance and manual unblocking. The manual unblocking workload is large and takes 7-10 days, which is relatively time-consuming. For this reason, we propose a processing method for the slag discharge port of a pulverized coal gasification furnace and its anti-blocking structure. Summary of the invention

[0004] The object of the present invention is to provide a method for processing a slag discharge port of a pulverized coal gasification furnace and an anti-blocking structure thereof, so as to solve the problems raised in the above-mentioned background technology.

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

[0006] Step A: Cutting the inner wall of the slag discharge port by a cutting machine;

[0007] Step B: welding a nickel-based steel plate smaller than the cutout to the inner wall of the slag discharge port to form a sealing layer for the inner wall of the slag discharge port, so as to expand 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 inner end thereof, and a mounting ring block is fixed to the lower surface of the slag discharge port;

[0010] A first protrusion is arranged on the inner wall of the mounting ring block;

[0011] The dredging component is slidably mounted on the inner side of the mounting ring block, and the inner wall of the dredging component has a second protrusion facing in 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 dredging assembly;

[0013] The driving component is arranged on the outer surface of the furnace body, and the output end of the driving component cooperates with the transmission component to drive the dredging component to move up and down.

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

[0015] Preferably, the dredging plate is rectangular, and a plurality of dredging plates are evenly distributed along the circumference of the dredging 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 matches the second convex plate, and the outer surface of the transmission ring block is provided with teeth.

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

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

[0019] Preferably, the driving assembly comprises a motor, a transmission shaft and a worm, the motor is fixed to the outer surface of the furnace body through a bracket, the output end of the motor has a transmission shaft, and one end of the transmission shaft is provided with a worm that matches the transmission assembly.

[0020] Preferably, the first protrusion is in a "V" shape.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) By cutting off the inner wall of the slag discharge port and expanding the inner diameter of the slag discharge port, the risk of slag blockage during slag discharge of the gasifier is avoided, and the stable operation of the gasifier is ensured. By expanding the slag discharge port, the oxygen load inside the gasifier is increased, the adaptability to inferior coal is improved, and the furnace temperature of the gasifier is reduced.

[0023] (2) By providing an installation ring block, a first protrusion, a dredging assembly, a transmission assembly and a drive assembly, it is convenient to perform power dredging at the slag discharge port, so as to avoid accidental slag blockage at the slag discharge port during long-term operation, which requires manual dredging. The slag discharge port has a high temperature and poses a safety risk. The device can automatically dredge to ensure a good slag discharge effect. It has a simple structure, stable operation, reduces labor costs, and increases the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the mounting ring block of the present invention;

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

[0027] Figure 4 It is a schematic diagram of the cross-sectional structure of the dredging ring block of the present invention;

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

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

[0030] In the figure: 1, furnace body; 2, slag discharge port; 201, mounting ring block; 3, first protrusion; 4, dredging assembly; 401, dredging ring block; 402, slider; 403, second protrusion plate; 404, dredging plate; 405, flow channel; 406, water inlet and outlet pipe; 5, second protrusion; 6, transmission assembly; 601, transmission ring block; 602, teeth; 603, first protrusion plate; 801, motor; 802, transmission shaft; 803, worm. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 6 The present invention provides a technical solution: a method for processing a slag outlet of a pulverized coal gasifier, comprising the following steps:

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

[0034] Step B: welding a nickel-based steel plate smaller than the cutout to the inner wall of the slag discharge port 2 to form a sealing layer for the inner wall of the slag discharge port 2, so as to expand 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] It is convenient to expand the diameter of the gasifier slag outlet 2, and the diameter of the slag outlet is expanded from φ1000mm to φ1138mm. The expansion of the diameter of the gasifier slag outlet can effectively improve the slag outlet slag blocking situation, reduce the risk of slag blocking in the gasifier, and make the gasifier run more stably. After the expansion, the oxygen load of the gasifier is greatly increased. Compared with the gasifier slag outlet before the expansion, the oxygen load of the gasifier is increased by 8%, and the amount of synthetic gas with the same oxygen load is increased by 15.8%. After the expansion, the risk of slag blocking in the gasifier is reduced and the temperature of the gasifier is reduced. The CO2 content in the synthetic gas component is reduced, and the corresponding CO+H2 content in the effective gas component is increased by 3.2%. Compared with the original technology gasifier, the unit oxygen load of the gasifier is increased by 8.6%, and the gasifier is more economical to operate. At the same time, the adaptability of the pulverized coal gasifier to inferior coal is increased. The original technology requires that the ash content of the coal entering the gasifier is 15.23%. After the implementation of this new technology, the ash content of the coal entering the gasifier can be as high as 21%.

[0037] A pulverized coal gasification furnace slag discharge port anti-blocking structure, comprising:

[0038] A furnace body 1, a slag discharge port 2 is provided at the lower inner end of the furnace body 1, and a mounting ring block 201 is fixed to the lower surface of the slag discharge port 2;

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

[0040] The dredging component 4 is slidably mounted on the inner side of the mounting ring block 201, and the inner wall of the dredging component 4 has a second protrusion 5 facing in the opposite direction to the first protrusion 3;

[0041] It is convenient to drive the adjacent coal slag to move displacedly through the first protrusion 3 and the second protrusion 5, so as to dredge the blockage;

[0042] 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 dredging assembly 4;

[0043] It is convenient to transmit power to the dredging component 4, thereby driving it to move up and down.

[0044] The drive assembly is arranged 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 dredging assembly 4 to move up and down.

[0045] Preferably, the dredging assembly 4 includes a dredging ring block 401, a slider 402, a second protrusion 403 and a dredging 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 a dredging plate 404 flush with the inner wall of the mounting ring block 201. The second protrusion 5 is fixed to the dredging plate 404. The other end of the slider 402 has a dredging ring block 401 that is mounted on the outer surface of the mounting ring block 201, and a second protrusion 403 is fixed to the lower surface of the dredging ring block 401.

[0046] The dredging ring block 401 drives multiple dredging plates 404 to move up and down at the same time, so as to dredge the slag blockage at the slag discharge port 2.

[0047] Preferably, the dredging plate 404 is rectangular, and a plurality of dredging plates 404 are evenly distributed along the circumference of the dredging ring block 401 .

[0048] To facilitate 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 to facilitate driving the transmission ring block 601 to rotate, thereby driving the first convex plate 603 thereon to move.

[0050] Preferably, the second protruding plate 403 is in a "D" shape, and the first protruding plate 603 has the same shape and structure as the second protruding plate 403, so as to facilitate pushing the dredging ring block 401 to move up and down.

[0051] Preferably, a flow channel 405 is opened 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 the injection of water flow, reduce the impact of the high temperature at the slag discharge port 2 on the device, and at the same time recover and reuse the heat energy.

[0052] Preferably, the driving assembly includes a motor 801, a transmission shaft 802 and a worm 803. The motor 801 is fixed to the outer surface of the furnace body 1 through a bracket. The output end of the motor 801 has a transmission shaft 802. The transmission shaft 802 and the furnace body 1 are matched through sealed bearings and sealing fillers to achieve sealing at the transmission. A worm 803 that matches the transmission assembly 6 is provided at one end of the transmission shaft 802 to facilitate driving the transmission ring block 601 to rotate.

[0053] Preferably, the first protrusion 3 is in a "V" shape, which is convenient for moving the coal slag for dredging.

[0054] The working principle and use process of the present invention are as follows: when in use, the slag discharge port 2 is cut, and then a new sealing layer is welded to expand the inner diameter of the slag discharge port 2, so as to improve the slag discharge effect and reduce the risk of slag blockage. When slag blockage occurs at the slag discharge port 2, the motor 801 is arranged outside the furnace body 1 away from the slag discharge port 2, and is installed and fixed by a bracket. The motor 801 drives the worm 803 to rotate through the transmission shaft 802, and the worm 803 is meshed with the teeth 602 to drive the first convex plate 603 to rotate, and the transmission ring block 601 on the first convex plate 603 is meshed with the second convex plate 403. The two convex plates 403 and 404 collide with each other to make the dredging ring block 401 rise, which in turn drives the dredging plate 404 to rise. The dredging plate 404 is misaligned with the inner wall of the mounting ring block 201 to push the slag blockage. Similarly, when the first convex plate 603 is staggered with the second convex plate 403, the dredging plate 404 and the inner wall of the mounting ring block 201 are misaligned and moved again. The slag blockage is dredged through the mutually staggered movements, thereby ensuring a good slag discharge effect. In addition, cold water can be injected into the inner side of the flow channel 405 through the water inlet and outlet pipe 406 to cool the slag discharge port, and the heat energy of the cold water after reflux heat absorption can be utilized.

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

Claims

1. A method for processing a slag outlet of a pulverized coal gasifier, characterized in that: The steps include: Step A: cutting off the inner wall of the slag discharge port (2) by a cutting machine; Step B: welding a nickel-based steel plate smaller than the cutout to the inner wall of the slag discharge port (2) to form a sealing layer for the inner wall of the slag discharge port (2), so as to expand the inner diameter of the slag discharge port (2) to 1100 mm-1200 mm; Step C: Grind the surface of the nickel-based steel plate to keep it smooth.

2. A pulverized coal gasification furnace slag outlet anti-blocking structure, characterized in that: include: A furnace body (1), wherein a slag discharge port (2) is provided at the inner lower end of the furnace body (1), and a mounting ring block (201) is fixed to the lower surface of the slag discharge port (2); A first protrusion (3) is arranged on the inner wall of the mounting ring block (201); The dredging component (4) is slidably mounted on the inner side of the mounting ring block (201), and the inner wall of the dredging component (4) has a second protrusion (5) facing in the opposite direction to the first protrusion (3); A 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 dredging assembly (4); A driving component is arranged on the outer surface of the furnace body (1), and the output end of the driving component cooperates with the transmission component (6) to drive the dredging component (4) to move up and down.

3. The anti-blocking structure of the slag discharge port of a pulverized coal gasification furnace according to claim 2, characterized in that: The dredging assembly (4) comprises a dredging ring block (401), a slider (402), a second convex plate (403) and a dredging plate (404); the slider (402) is slidably mounted on the inner side of the mounting ring block (201); one end of the slider (402) is provided with a dredging plate (404) flush with the inner wall of the mounting ring block (201); the second convex block (5) is fixed to the dredging plate (404); the other end of the slider (402) is provided with a dredging ring block (401) sleeved on the outer surface of the mounting ring block (201); and the lower surface of the dredging ring block (401) is fixed with the second convex plate (403).

4. The anti-blocking structure of the slag discharge port of a pulverized coal gasification furnace according to claim 3, characterized in that: The dredging plate (404) is rectangular, and a plurality of dredging plates (404) are evenly distributed along the circumference of the dredging ring block (401).

5. The anti-blocking structure of the slag discharge port of a pulverized coal gasification furnace according to claim 4, characterized in that: The transmission assembly (6) comprises 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); the upper surface of the transmission ring block (601) has a first convex plate (603) that matches the second convex plate (403); and the outer surface of the transmission ring block (601) is provided with teeth (602).

6. The anti-blocking structure of the slag discharge port of a pulverized coal gasification furnace according to claim 5, characterized in that: The second convex plate (403) is in a "D" shape, and the first convex plate (603) has the same shape and structure as the second convex plate (403).

7. The anti-blocking structure of the slag discharge port of a pulverized coal gasification furnace according to claim 4, characterized in that: A flow channel (405) is provided on the inner side of the dredging ring block (401), and an inlet and outlet pipe (406) communicating with the inside of the flow channel (405) is provided on the outer surface of the dredging ring block (401).

8. The anti-blocking structure of the slag discharge port of a pulverized coal gasification furnace according to claim 2, characterized in that: The driving assembly comprises a motor (801), a transmission shaft (802) and a worm (803); the motor (801) is fixed to the outer surface of the furnace body (1) via 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 (803) that matches the transmission assembly (6).

9. The anti-blocking structure of the slag discharge port of a pulverized coal gasification furnace according to claim 2, characterized in that: The first protrusion (3) is in a "V" shape.

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