A composite sealing expansion structure of a gasifier water-cooled wall slag port cooler

Abstract

The application relates to the technical field of chemical equipment, and discloses a gasification furnace water-cooled wall slag port cooler composite sealing expansion structure. The gasification furnace water-cooled wall slag port cooler composite sealing expansion structure comprises a gasification furnace body, a sealing assembly is arranged on the gasification furnace body, and the sealing assembly comprises a water-cooled wall cooling water inlet pipe. The gasification furnace water-cooled wall slag port cooler composite sealing expansion structure prevents gas channeling, causes furnace body overpressure, and causes a major safety hazard of flattening. The sealing assembly is provided with a sealing assembly, the assembly is matched with a cooler shell outside ring cavity, graphite nickel wire coils and refractory fiber cotton are alternately layered in the sealing assembly, the coils are arranged in upper and lower zones, the sealing assembly is adapted to uneven annular gaps, dense bidirectional sealing is realized, an outer shell steel ring forms an outside airflow enclosure barrier, high-temperature synthesis gas and interlayer protective gas are blocked from directly washing the filler, and the filler powdering and loss speed is reduced.

Description

Technical Field

[0001] This invention relates to the field of chemical equipment technology, specifically to a composite sealing expansion structure for a gasifier water-cooled wall slag outlet cooler. Background Technology

[0002] The composite sealing expansion structure of the slag mouth cooler of the water-cooled wall of the gasifier is a key sealing and protection component in the slag mouth area of ​​the pulverized coal gasifier. Its core function is to implement multi-layer composite sealing of the annular gap between the slag mouth cooler and the lower water-cooled wall, while providing thermal expansion displacement compensation and isolating the bidirectional flow of high-temperature syngas and interlayer protective gas.

[0003] Existing gasification furnace slag inlet seals generally adopt a single packing sealing structure, relying solely on packing and refractory fiber cotton to fill the annular gap. The packing and fiber cotton are manually filled into the annular gap layer by layer, relying on the compression density to block gas flow. When the equipment is running, the packing is continuously subjected to bidirectional airflow scouring and thermal expansion compression.

[0004] However, the above-mentioned equipment has obvious shortcomings in use. Traditional gasifier slag outlet coolers mostly adopt a single sealing packing structure without a layered composite sealing system. Under the alternating high temperature and high pressure conditions inside the furnace, the sealing packing is prone to problems such as uneven compaction and local voids. In view of this, we propose a composite sealing expansion structure for gasifier water-cooled wall slag outlet coolers. Summary of the Invention

[0005] The purpose of this invention is to provide a composite sealing expansion structure for a gasifier water-cooled wall slag outlet cooler to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A composite sealing and expansion structure for a slag outlet cooler of a gasifier water-cooled wall includes a gasifier body. A sealing assembly is provided on the gasifier body. The sealing assembly includes a water-cooled wall cooling water inlet pipe, which is disposed on the gasifier body. A coarse slag discharge pipe, a nitrogen purging pipe, and a pressure tap nitrogen backflush pipe are provided on the gasifier body. A cooler body is fixedly installed inside the gasifier body. A grid plate is fixedly installed between the cooler body and the interior of the gasifier body. A slag outlet cooling module is provided on the cooler body. The cooler body is equipped with cooling water pipes, the gasifier body is equipped with a slag outlet temperature thermocouple sheath, the gasifier body is equipped with a sealing cavity pressure monitoring pipe and a water-cooled wall exhaust vent pipe, the gasifier body is equipped with an equipment pressure relief vent pipe at the bottom of the gasifier body, and the gasifier body is equipped with a furnace top pressure measuring pipe and a furnace top vent pipe.

[0007] In a further embodiment, the slag outlet cooling module includes a cooler housing located inside the gasifier furnace at the slag outlet. A slag outlet channel pipe is fixedly installed on the cooler housing. Multiple sets of cooling pipes are attached to the cooler housing. A cooling coil is sleeved on the slag outlet channel pipe. An outward-facing pipe is provided on the slag outlet channel pipe. A steel outer shell ring is fixedly installed between the outward-facing pipe and the multiple sets of cooling pipes. A SiC refractory layer is provided between the cooling coil and the outward-facing pipe.

[0008] In a further embodiment, a pin bearing base is provided on the inner side of the SiC refractory layer. The pin bearing base includes a Y-shaped pin and spot-welded mesh round steel. The pin bearing base is fixed to the outer wall of the cooling pipe and the outward-facing pipe as a whole. The SiC refractory layer is completely laid on the surface of the pin bearing base.

[0009] In a further embodiment, the cooler shell and the outer ring cavity of the outer steel ring are filled with multi-layer composite sealing packing. The multi-layer composite sealing packing is composed of graphite nickel wire packing and refractory fiber cotton, which are alternately filled in layers, with the packing arranged in upper and lower sections.

[0010] In a further embodiment, the gasifier body is provided with a reinforcing assembly, which includes a tension ring. The tension ring is sleeved on multiple sets of cooling pipes. A protective ring is fixedly installed on the tension ring. An mounting plate is fixedly installed on the protective ring. A circular ring is placed on each of the multiple sets of cooling pipes. A connecting plate is fixedly installed on the circular ring. A tensioning strip is fixedly installed between the mounting plate and the connecting plate. Multiple sets of connecting blocks are fixedly installed below the connecting plates. A support ring is fixedly installed on each of the multiple sets of connecting blocks.

[0011] In a further embodiment, multiple sets of mounting plates, connecting plates, tensioning strips, and connecting blocks are provided, and the support ring is attached to the bottom of multiple sets of cooling pipes.

[0012] In a further embodiment, multiple sets of mounting plates, connecting plates, tensioning strips, and connecting blocks are provided, and the support ring is attached to the bottom of multiple sets of cooling pipes.

[0013] In a further embodiment, auxiliary components are provided on multiple sets of cooling pipes. The auxiliary components include support blocks, which are fixedly installed on the cooling pipes. A tapered threaded cylinder is sleeved on the cooling pipe, and a threaded ring is threadedly installed on the tapered threaded cylinder. A protective block is fixedly installed on the threaded ring.

[0014] In a further embodiment, an anti-slip ring is fixedly installed inside the tapered threaded cylinder, and the anti-slip ring is attached to the surface of the cooling pipe.

[0015] In a further embodiment, the tapered threaded cylinder is positioned above the support block, and the tapered threaded cylinder has an overall shape that is narrower at the top and wider at the bottom.

[0016] Compared with the prior art, the present invention provides a composite sealing expansion structure for a gasifier water-cooled wall slag outlet cooler, which has the following beneficial effects: 1. The composite sealing expansion structure of the slag outlet cooler of the water-cooled wall of the gasifier is designed to prevent gas leakage from causing overpressure and flattening of the furnace body, which poses a significant safety hazard. This is achieved by installing a sealing component, which works in conjunction with the multi-layer composite sealing packing of graphite nickel wire packing and refractory fiber cotton alternating layers in the outer annular cavity of the cooler shell. The packing is arranged in upper and lower sections to accommodate uneven annular gaps, achieving a dense bidirectional seal. The outer steel ring forms an outer airflow protection barrier, preventing high-temperature syngas and interlayer protective gas from directly eroding the packing and reducing the rate of packing pulverization and loss.

[0017] 2. The gasifier water-cooled wall slag outlet cooler features a composite sealing expansion structure. To extend the overall service life of the slag outlet cooler, a reinforcing component is incorporated. This component, along with a tightening ring, is wrapped around the outside of multiple sets of cooling tubes, forming an outer ring constraint with a protective ring to restrict the outward expansion and deformation of the cooling tubes due to heat. The ring is also fitted inside the cooling tube array, and the mounting plate and connecting plate are connected by a tensioning strip, forming a bidirectional tensioning structure that firmly locks each cooling tube in its designed position, preventing displacement of a single cooling tube that could lead to uneven circumferential gaps.

[0018] 3. The gasifier water-cooled wall slag outlet cooler features a composite sealing expansion structure. To reduce the frequency of unplanned shutdowns and maintenance of the gasifier, an auxiliary component is included. This component works in conjunction with a fixed support block on the cooling pipe as a support base. A tapered threaded cylinder is fitted onto the outside of the cooling pipe and sits above the support block. The tapered cylinder is narrower at the top and wider at the bottom. As the rotating threaded ring moves down along the tapered threaded cylinder, the inner wall of the tapered cylinder gradually tightens and hugs the cooling pipe. The anti-slip ring tightly adheres to the surface of the cooling pipe, increasing friction and forming a reliable local locking point. The protective block on the outside of the threaded ring protects the threaded structure from corrosion by high-temperature flue gas and molten slag. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective; Figure 3 This is a cross-sectional view of the overall structure of the present invention; Figure 4 This is a schematic diagram of the slag outlet cooling module structure of the present invention; Figure 5 This is a schematic diagram of the slag outlet cooling module structure from another perspective of the present invention; Figure 6 This is a schematic diagram of the auxiliary component structure of the present invention; Figure 7 This is a schematic diagram of the reinforcement component structure of the present invention; Figure 8 This is a cross-sectional schematic diagram of the reinforcement component structure of the present invention; Figure 9 This is a cross-sectional view of the slag outlet cooling module structure of the present invention; Figure 10 This is a cross-sectional schematic diagram of a portion of the slag outlet cooling module of the present invention.

[0020] Explanation of icon numbers: 1. Gasifier body; 2. Sealing components; 21. Water-cooled wall cooling water inlet pipe; 22. Coarse slag discharge pipe; 23. Nitrogen purging pipe; 24. Pressure tap nitrogen backflush pipe; 25. Cooler body; 26. Grid plate; 27. Slag port cooling module; 271. Cooler shell; 272. Slag port channel pipe; 273. Cooling pipe; 274. Cooling coil; 275. Outward-facing pipe; 276. Outer steel ring; 277. SiC refractory layer; 28. Cooling water pipeline; 29. ​​Slag port temperature thermocouple sheath; 210. Sealing cavity pressure monitoring pipe; 211. Water-cooled wall exhaust vent pipe; 212. Equipment pressure relief vent pipe; 213. Furnace top pressure measuring pipe; 214. Furnace top vent pipe; 3. Reinforcing components; 31. Tensioner ring; 32. Protective ring; 33. Mounting plate; 34. Circular ring; 35. Connecting plate; 36. Tensioning strip; 37. Connecting block; 38. Support ring; 4. Auxiliary components; 41. Support block; 42. Tapered threaded cylinder; 43. Anti-slip ring; 44. Threaded ring; 45. Protective block. Detailed Implementation

[0021] 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.

[0022] In this application, the term "above" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is primarily used to better describe this application and its embodiments, and is not intended to limit the indicated device, element, or component to having a specific orientation, or to construct and operate in a specific orientation. Furthermore, the term "above" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.

[0023] Please see Figures 1-10 The present invention provides a technical solution: A composite sealing expansion structure for a slag outlet cooler of a water-cooled wall in a gasifier includes a gasifier body 1.

[0024] In one embodiment of the present invention, a sealing assembly 2 is provided on the gasifier body 1. The sealing assembly 2 includes a water-cooled wall cooling water inlet pipe 21, which is disposed on the gasifier body 1. The gasifier body 1 is provided with a coarse slag discharge pipe 22, a nitrogen purging pipe 23, and a pressure tap nitrogen backflush pipe 24. A cooler body 25 is fixedly installed inside the gasifier body 1. A grid plate 26 is fixedly installed between the cooler body 25 and the interior of the gasifier body 1. The gasifier body 1 is equipped with a slag outlet cooling module 27, a cooling water pipe 28, a slag outlet temperature thermocouple sheath 29, a sealing cavity pressure monitoring pipe 210, a water-cooled wall exhaust vent pipe 211, an equipment pressure relief vent pipe 212, a furnace top pressure measuring pipe 213, and a furnace top vent pipe 214. The slag outlet cooling module 27 includes a cooler shell 271. The cooler shell 271 is located inside the gasifier body 1 at the slag opening. A slag opening channel pipe 272 is fixedly installed on the cooler shell 271. Multiple sets of cooling pipes 273 are attached to the cooler shell 271. A cooling coil 274 is sleeved on the slag opening channel pipe 272. An outward-facing pipe 275 is provided on the slag opening channel pipe 272. A steel outer ring 276 is fixedly installed between the outward-facing pipe 275 and the multiple sets of cooling pipes 273. A SiC refractory layer 277 is provided between the cooling coil 274 and the outward-facing pipe 275. A pin bearing base is set on the inner side of the SiC refractory layer 277. The pin bearing base includes a Y-shaped pin and spot-welded mesh round steel. The pin bearing base is fixed to the outer wall of the cooling pipe 273 and the outward-facing pipe 275. The SiC refractory layer 277 is completely laid on the surface of the pin bearing base. The cooler shell 271 and the outer ring 276 are filled with multi-layer composite sealing filler. The multi-layer composite sealing filler is composed of graphite nickel wire packing and refractory fiber cotton, which are alternately filled in layers. The packing is arranged in layers and sections.

[0025] In this embodiment, during the on-site operation of the gasifier, coal slurry and oxygen react at high temperatures inside the furnace to generate crude syngas and molten slag. The molten slag flows downward along the slag outlet channel pipe 272 and is discharged outside the furnace through the coarse slag discharge pipe 22. The water-cooled wall cooling water inlet pipe 21 continuously supplies circulating cooling water to the cooling water pipe 28, cooling coil 274, and multiple sets of cooling pipes 273. The cooling coil 274 forms an inner layer of cooling by closely adhering to the outer wall of the slag outlet channel pipe 272, and the annular cooling pipe array 273, in conjunction with the outward-curving pipes 275, forms an outer layer of cooling. The layered cooling system continuously removes heat from the slag outlet area, keeping the working temperature of the sealing packing within its tolerance range. Y-shaped pins and mesh round steel pins on the outer walls of the outward-facing pipe 275 and cooling pipe 273 firmly anchor the SiC refractory layer 277. The SiC refractory layer 277 directly faces the high-temperature molten slag and the syngas flow, resisting slag erosion and high-temperature radiation, protecting the internal cooling pipe 273 and sealing packing from direct burn-out. The grid plate 26 evenly distributes the airflow between the cooler body 25 and the furnace wall, preventing localized airflow deviation. In the sealing area, within the annular cavity between the cooler shell 271 and the outer steel ring 276, graphite nickel wire packing and refractory fiber cotton are alternately filled in layers. The packing is arranged in upper and lower sections to adapt to uneven annular gaps, forming a dense bidirectional seal that effectively blocks the upward flow of high-temperature syngas along the slag opening annular seam. The outer steel ring 276 forms an outer airflow protection barrier, preventing syngas and protective gas from directly eroding the sealing packing and slowing down the packing pulverization and loss rate. During operation, the slag opening temperature is monitored in real time by the thermocouple sheath 29. The sealing cavity pressure monitoring pipe 210 monitors changes in sealing cavity pressure. If the pressure rises abnormally, it indicates that the seal has failed and gas leakage has occurred, which can trigger an alarm in time. The furnace top pressure measuring pipe 213 monitors the furnace pressure. The equipment pressure relief pipe 212, the furnace top vent pipe 214, and the water-cooled wall exhaust vent pipe 211 can quickly relieve pressure under overpressure conditions to prevent the furnace body from being crushed due to overpressure and causing a major safety accident. The nitrogen purging pipe 23 and the pressure tap nitrogen backflush pipe 24 continuously purge nitrogen to prevent slag blockage at the slag port and ash accumulation at the pressure tap port.

[0026] In one embodiment of the present invention, a reinforcing component 3 is provided on the gasifier body 1. The reinforcing component 3 includes a tension ring 31, which is sleeved on multiple sets of cooling pipes 273. A protective ring 32 is fixedly installed on the tension ring 31, and an mounting piece 33 is fixedly installed on the protective ring 32. A circular ring 34 is placed on the multiple sets of cooling pipes 273, and a connecting piece 35 is fixedly installed on the circular ring 34. A tensioning strip 36 is fixedly installed between the mounting piece 33 and the connecting piece 35. Multiple sets of connecting blocks 37 are fixedly installed below the connecting piece 35, and a support ring 38 is fixedly installed on the multiple sets of connecting blocks 37. Multiple sets of mounting pieces 33, connecting pieces 35, tensioning strips 36, and connecting blocks 37 are provided. The support ring 38 fits against the bottom of the multiple sets of cooling pipes 273. An expansion groove is provided on the tension ring 31. The tensioning strip 36 is made of high-temperature resistant alloy material. The multiple sets of cooling pipes 273 are located between the circular ring 34 and the support ring 38.

[0027] In this embodiment, during the heating and operation of the gasifier, the multiple sets of cooling tubes 273 in the annular array exhibit a radial expansion tendency due to heat. The tension ring 31, in conjunction with the protective ring 32, constrains the cooling tubes 273 from the outside, limiting their outward expansion and deformation. The inner ring 34 provides support from the inside, and together with the tensioning strip 36, the inner and outer rings are connected as a whole. Each tensioning strip 36 is made of high-temperature resistant alloy material, maintaining high tensile strength at high temperatures, firmly locking all cooling tubes 273 in the designed circumferential position. This prevents individual cooling tubes 273 from shifting due to heat, resulting in uneven gaps in the annular seams, and prevents excessively large local gaps from causing the sealing packing to not be tightly pressed and gas leakage. The support ring 38 below the connecting block 37 lifts all cooling tubes 273 from the bottom, counteracting the downward displacement tendency caused by the weight of the cooling tubes 273 and thermal expansion, preventing the cooling tubes 273 from falling and squeezing the bottom sealing packing, and avoiding long-term compression deformation and failure of the packing. The expansion groove in the tension ring 31 allows for slight thermal expansion and deformation of the structure, preventing excessive thermal stress from the rigid constraint from damaging the cooling tubes 273.

[0028] In one embodiment of the present invention, an auxiliary component 4 is provided on multiple sets of cooling pipes 273. The auxiliary component 4 includes a support block 41, which is fixedly installed on the cooling pipe 273. A tapered threaded cylinder 42 is sleeved on the cooling pipe 273. A threaded ring 44 is threadedly installed on the tapered threaded cylinder 42. A protective block 45 is fixedly installed on the threaded ring 44. An anti-slip ring 43 is fixedly installed inside the tapered threaded cylinder 42. The anti-slip ring 43 is in contact with the surface of the cooling pipe 273. The tapered threaded cylinder 42 is located above the support block 41. The tapered threaded cylinder 42 has a shape that is narrower at the top and wider at the bottom.

[0029] In this embodiment, when assembling the array of cooling tubes 273, a support block 41 is fixed at the corresponding position of each cooling tube 273. The tapered threaded cylinder 42 is inserted from the top into the outer wall of multiple sets of cooling tubes 273, with the bottom of the tapered threaded cylinder 42 resting on the support block 41. The threaded ring 44 is rotated, and the threaded ring 44 is screwed downward along the external thread of the tapered threaded cylinder 42. Since the tapered threaded cylinder 42 is narrower at the top and wider at the bottom, the inner wall of the tapered threaded cylinder 42 gradually tightens inward during the downward movement of the threaded ring 44. The internal anti-slip ring 43 tightly hugs the surface of the cooling tube 273, and the anti-slip ring 43 increases the friction, forming a reliable local locking point to prevent the cooling tubes 273 from moving up and down.

[0030] All standard parts used in this application can be purchased from the market. The specific connection methods of each part are all conventional methods such as riveting and welding that are mature in the prior art. The standard parts are all conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art. It should be noted that the above electrical components are all prior art products. Those skilled in the art should select, install and complete the circuit debugging work according to the needs of use to ensure that each electrical appliance can work normally. The components are all general standard parts or components known to those skilled in the art. Their structure and principle can be known by those skilled in the art through technical manuals or conventional experimental methods. No specific restrictions are made here.

[0031] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A composite sealing expansion structure for a gasifier water-cooled wall slag outlet cooler, comprising a gasifier body (1), characterized in that: A sealing assembly (2) is provided on the gasifier body (1). The sealing assembly (2) includes a water-cooled wall cooling water inlet pipe (21). The water-cooled wall cooling water inlet pipe (21) is provided on the gasifier body (1). The gasifier body (1) is provided with a coarse slag discharge pipe (22), a nitrogen purging pipe (23), and a pressure tap nitrogen backflush pipe (24). A cooler body (25) is fixedly installed inside the gasifier body (1). A grid plate (26) is fixedly installed between the cooler body (25) and the inside of the gasifier body (1). A slag outlet cooling module (27) is provided on the cooler body (25). The cooler body (25) is provided with a cooling water pipeline (28), the gasifier furnace body (1) is provided with a slag outlet temperature thermocouple sheath (29), the gasifier furnace body (1) is provided with a sealing cavity pressure monitoring pipe (210) and a water-cooled wall exhaust vent pipe (211), the gasifier furnace body (1) is provided with an equipment pressure relief vent pipe (212) below the gasifier furnace body (1), and the gasifier furnace body (1) is provided with a furnace top pressure measuring pipe (213) and a furnace top vent pipe (214) above the gasifier furnace body (1).

2. The composite sealing expansion structure of the gasifier water-cooled wall slag outlet cooler according to claim 1, characterized in that: The slag outlet cooling module (27) includes a cooler shell (271), which is located inside the gasifier body (1) at the slag outlet. A slag outlet channel pipe (272) is fixedly installed on the cooler shell (271). Multiple sets of cooling pipes (273) are attached to the cooler shell (271). A cooling coil (274) is sleeved on the slag outlet channel pipe (272). An outward-turning pipe (275) is provided on the slag outlet channel pipe (272). A steel ring (276) is fixedly installed between the outward-turning pipe (275) and the multiple sets of cooling pipes (273). A SiC refractory layer (277) is provided between the cooling coil (274) and the outward-turning pipe (275).

3. The composite sealing expansion structure of the gasifier water-cooled wall slag outlet cooler according to claim 2, characterized in that: The inner side of the SiC refractory layer (277) is provided with a pin bearing base. The pin bearing base includes a Y-shaped pin and a spot-welded mesh round steel. The pin bearing base is fixed to the outer wall of the cooling pipe (273) and the outward-facing pipe (275). The SiC refractory layer (277) is completely laid on the surface of the pin bearing base.

4. The composite sealing expansion structure of the gasifier water-cooled wall slag outlet cooler according to claim 2, characterized in that: The cooler shell (271) and the outer ring (276) are filled with multi-layer composite sealing packing. The multi-layer composite sealing packing is composed of graphite nickel wire packing and refractory fiber cotton, which are alternately filled in layers. The packing is arranged in layers and sections.

5. The composite sealing expansion structure of the gasifier water-cooled wall slag outlet cooler according to claim 2, characterized in that: The gasifier body (1) is provided with a reinforcing component (3). The reinforcing component (3) includes a tension ring (31). The tension ring (31) is sleeved on multiple sets of cooling pipes (273). A protective ring (32) is fixedly installed on the tension ring (31). An installation piece (33) is fixedly installed on the protective ring (32). A circular ring (34) is placed on the multiple sets of cooling pipes (273). A connecting piece (35) is fixedly installed on the circular ring (34). A tensioning strip (36) is fixedly installed between the installation piece (33) and the connecting piece (35). Multiple sets of connecting blocks (37) are fixedly installed below the connecting piece (35). A support ring (38) is fixedly installed on the multiple sets of connecting blocks (37).

6. The composite sealing expansion structure of the gasifier water-cooled wall slag outlet cooler according to claim 5, characterized in that: The mounting plate (33), connecting plate (35), tensioning strip (36) and connecting block (37) are provided in multiple sets, and the support ring (38) is attached to the bottom of multiple sets of cooling pipes (273).

7. The composite sealing expansion structure of the gasifier water-cooled wall slag outlet cooler according to claim 5, characterized in that: The tension ring (31) has an expansion groove, the tensioning strip (36) is made of high temperature resistant alloy material, and multiple sets of cooling pipes (273) are arranged between the ring (34) and the support ring (38).

8. The composite sealing expansion structure of the gasifier water-cooled wall slag outlet cooler according to claim 2, characterized in that: Multiple sets of cooling pipes (273) are provided with auxiliary components (4). The auxiliary components (4) include a support block (41), which is fixedly installed on the cooling pipe (273). A tapered threaded cylinder (42) is sleeved on the cooling pipe (273). A threaded ring (44) is threaded on the tapered threaded cylinder (42), and a protective block (45) is fixedly installed on the threaded ring (44).

9. The composite sealing expansion structure of the gasifier water-cooled wall slag outlet cooler according to claim 8, characterized in that: An anti-slip ring (43) is fixedly installed inside the tapered threaded cylinder (42), and the anti-slip ring (43) is attached to the surface of the cooling pipe (273).

10. The composite sealing expansion structure of the gasifier water-cooled wall slag outlet cooler according to claim 8, characterized in that: The tapered threaded cylinder (42) is positioned above the support block (41), and the tapered threaded cylinder (42) is generally narrow at the top and wide at the bottom.

Images