Sealing device and sealing method for water cooler of semi-waste boiler gasification furnace

Abstract

The invention relates to the technical field of semi-waste boiler gasification furnace sealing, in particular to a semi-waste boiler gasification furnace water cooler sealing device and method, a gap between a water cooler and an upper water cooling wall is sealed through a high-temperature-resistant flexible sealing piece, and meanwhile the sealing effect between the water cooler and the upper water cooling wall after deformation can be guaranteed; meanwhile, a supporting cylinder is arranged between the water cooler and the high-temperature-resistant flexible sealing piece, a supporting arc plate is arranged between the high-temperature-resistant flexible sealing piece and the upper water cooling wall, the supporting cylinder is in sealed connection with the water cooler, and the supporting arc plate is in sealed connection with the upper water cooling wall, so that the situation that the sealing effect is reduced due to insufficient contact is avoided; meanwhile, the supporting arc plates are extruded when the upper water cooling wall is subjected to thermal deformation, so that the deformation of the upper water cooling wall is prevented from being hindered, and the service life is guaranteed; and meanwhile, the top pressing ring and the bottom supporting ring are used for limiting the position of the high-temperature-resistant flexible sealing piece in the extrusion deformation process, the sealing effect is guaranteed, and the sealing requirement is met.

Description

Technical Field

[0001] The invention relates to the technical field of sealing of a semi-waste boiler gasifier, and in particular to a sealing device and a sealing method for a water cooler of a semi-waste boiler gasifier. Background Art

[0002] The semi-waste boiler gasifier is a new type of gasifier technology, jointly developed by East China University of Science and Technology and the former Yanzhou Coal Mining Group. It chooses to add a section of radiation waste boiler between the gasification chamber and the quenching chamber, arranges a water-cooled wall on the waste boiler section, and arranges a water cooler at the upper and lower ends of the waste boiler section.

[0003] The raw coal and oxygen undergo an incomplete oxidation reaction in the gasification chamber to generate water gas. The high-temperature water gas enters the waste boiler section and is recovered by introducing high-pressure boiler water into the upper and lower water coolers and the upper water-cooled wall to absorb the sensible heat of the water gas to generate saturated steam. After the water gas recovers heat through the waste boiler section, it enters the quenching chamber for further quenching.

[0004] In the actual working process, due to the inconsistent amount of thermal expansion between the upper water cooler and the upper water-cooled wall, relative sliding and thermal deformation will occur, which may easily cause a gap between the two and cause water gas leakage; the existing method usually sets a sealing structure between the two. For example, the Chinese utility model patent with application number 2021213003361 provides a sealing structure for the waste boiler section of a semi-waste boiler gasifier, which supports the heat-resistant parts by setting fillers and filling heat-resistant parts, and welds fixing parts on the inner side of the water cooler return cofferdam to support the heat-resistant parts and compress the fillers at the same time; in actual use, it is found that after the fixing parts are deformed by heat during welding or use, the sealing effect is reduced, which can easily cause gas blowby in the interlayer (between the upper water-cooled wall and the outer wall of the gasifier), causing the temperature of the gasifier support plate to overheat; at the same time, after the upper water-cooled wall expands due to heat, the expansion is restricted under the limiting action of the fixing parts and the heat-resistant parts, which can easily cause damage to the upper water-cooled wall and cannot meet actual operation needs. Summary of the invention

[0005] The purpose of the present invention is to provide a sealing device and a sealing method for a water cooler of a semi-waste boiler gasifier, so as to solve the technical problem that the sealing structure of the water cooler of the semi-waste boiler gasifier has poor sealing effect.

[0006] The present invention solves the above-mentioned technical problems by:

[0007] A semi-waste boiler gasifier water cooler sealing device, comprising a high temperature resistant flexible seal arranged between the water cooler and the upper water cooling wall, a packing pressure plate connected to the water cooler and a supporting arc plate sleeved on the outside of the high temperature resistant flexible seal; the packing pressure plate comprises a supporting tube, a top pressure ring and a bottom supporting ring;

[0008] The support tube is sleeved on the outside of the water cooler and is sealed with the water cooler, the high temperature resistant flexible seal, the top pressure ring and the bottom support ring are all arranged between the support arc plate and the support tube, the bottom support ring is sleeved on the outside of the support tube and is connected to the support tube, the bottom support ring is in contact with the bottom of the high temperature resistant flexible seal, one end of the top pressure ring is in contact with the top of the high temperature resistant flexible seal, and the other end of the top pressure ring is connected to the support tube.

[0009] It is further defined that the ratio of the thickness of the bottom support ring to the thickness of the high temperature resistant flexible seal is 1:(1.5-1.6), and the spacing between the outer wall of the top pressure ring and the inner wall of the support arc plate and the spacing between the inner wall of the top pressure ring and the outer wall of the support tube are both 2mm-4mm.

[0010] It is further defined that the number of the supporting arc plates is multiple, and the multiple supporting arc plates are arranged around the circumference of the axis of the upper water-cooled wall.

[0011] It is further defined that the supporting arc plate is sealed and connected to the upper water-cooled wall through a sealing block, the upper water-cooled wall includes a plurality of water pipes arranged vertically in parallel, one end of the sealing block is sealed and connected between two adjacent water pipes, and the other end of the sealing block is sealed and connected to the outer wall of the supporting arc plate, and the sealing block is located above the supporting arc plate.

[0012] It is further defined that a refractory layer is provided on the water cooler, and the refractory layer extends from the inner wall of the water cooler to the outside of the return cofferdam, the support tube is sleeved on the outside of the return cofferdam, the support tube is located above the refractory layer, the return cofferdam includes multiple layers of coils wound from bottom to top, and the bottom and upper ends of the support tube are welded to the coils at closely corresponding positions of the return cofferdam.

[0013] It is further defined that the inner wall of the support tube is also sealedly connected to the return cofferdam through a sealing plate, and the sealing plate is fastened between two adjacent layers of coils.

[0014] It is further defined that the support tube is connected to the top pressure ring through a pressure ring connecting mechanism; the pressure ring connecting mechanism includes a first pressure ring plate, a second pressure ring plate and a disassembly connecting piece, the support tube is sleeved on the outer side of the first pressure ring plate and connected to the first pressure ring plate, the top pressure ring is sleeved on the outer side of the second pressure ring plate and connected to the top pressure ring, the second pressure ring plate is located above the first pressure ring plate, the first pressure ring plate is located above the return cofferdam, and the first pressure ring plate is detachably connected to the second pressure ring plate through a disassembly connecting piece.

[0015] It is further defined that a disassembly auxiliary seat is provided on the top of the second pressure ring plate.

[0016] It is further defined that the material of the sealing plate, the material of the sealing block, the material of the packing pressure plate and the material of the pressure ring connecting mechanism are all S31603, and the high temperature resistant flexible sealing component is graphite packing.

[0017] A method for sealing a water cooler of a semi-waste boiler gasifier, based on the above-mentioned water cooler sealing device of a semi-waste boiler gasifier, comprises the following steps:

[0018] S1. Set a refractory layer on the water cooler;

[0019] S2. Weld a sealing plate between two adjacent layers of coils, and weld a sealing block between two adjacent water pipes;

[0020] S3, laying the supporting arc plate according to the curvature of the inner wall of the upper water-cooled wall and welding it to the sealing block;

[0021] S4, sleeve the support tube on the outside of the return cofferdam of the water cooler, and weld the bottom end and the top end of the support tube to the coils at corresponding positions respectively;

[0022] S5, welding the bottom support ring to the outside of the support tube, welding the first pressure ring plate to the top of the support tube, welding the second pressure ring plate to the top pressure ring, and connecting the disassembly auxiliary seat to the top of the second pressure ring plate;

[0023] S6. Fill the high temperature resistant flexible seal between the supporting arc plate and the supporting tube, and make the bottom of the high temperature resistant flexible seal contact with the bottom supporting ring;

[0024] S7, vertically extend the top pressure ring between the supporting arc plate and the supporting tube and make contact with the top of the high temperature resistant flexible sealing member, and then use the disassembly connector to connect the first pressure ring plate and the second pressure ring plate.

[0025] The beneficial effects of the present invention are:

[0026] The present invention utilizes a high-temperature resistant flexible seal to seal the gap between the water cooler and the upper water-cooled wall, while ensuring the sealing effect between the two after deformation; at the same time, a support tube is arranged between the water cooler and the high-temperature resistant flexible seal, and a support arc plate is arranged between the high-temperature resistant flexible seal and the upper water-cooled wall, and the support tube is sealedly connected to the water cooler, and the support arc plate is sealedly connected to the upper water-cooled wall, so as to avoid reduction of the sealing effect due to insufficient contact; at the same time, the support arc plate is used to extrude the support arc plate when the upper water-cooled wall is thermally deformed, so as to avoid obstruction to the deformation of the upper water-cooled wall and ensure the service life; at the same time, the top pressure ring and the bottom support ring are used to limit the position of the high-temperature resistant flexible seal during the extrusion deformation process, so as to ensure the sealing effect and meet the sealing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the installation of the water cooler sealing device of the semi-waste boiler gasifier of the present invention;

[0028] Figure 2 This is a schematic structural diagram of a water cooler sealing device for a semi-waste boiler gasifier according to the present invention;

[0029] Figure 3 This is a schematic diagram of the sealing plate structure of the present invention;

[0030] 10-water cooler; 20-high temperature resistant flexible seal; 30-packing pressure plate; 31-support tube; 32-top pressure ring; 33-bottom support ring; 34-sealing plate; 40-support arc plate; 41-sealing block; 50-refractory layer; 60-pressure ring connecting mechanism; 61-first pressure ring plate; 62-second pressure ring plate; 63-disassembly connector; 70-disassembly auxiliary seat; 80-upper water-cooled wall. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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] Example 1

[0033] refer to Figures 1 to 3 The present embodiment provides a sealing device for a water cooler of a semi-waste boiler gasifier, comprising a high-temperature resistant flexible seal 20, a packing pressure plate 30 and a supporting arc plate 40; wherein the packing pressure plate 30 comprises a supporting tube 31, a top pressure ring 32 and a bottom supporting ring 33, and the high-temperature resistant flexible seal 20 is arranged between the supporting tube 31 and the supporting arc plate 40 and between the top pressure ring 32 and the bottom supporting ring 33.

[0034] Specifically, the supporting arc plate 40 is laid along the inner wall of the upper water-cooled wall 80 , and the supporting arc plate 40 and the upper water-cooled wall 80 are sealedly connected.

[0035] The high temperature resistant flexible seal 20 may be a graphite packing, and the high temperature resistant flexible seal 20 is wound around the outside of the support tube 31 .

[0036] During actual use, when the upper water-cooled wall 80 expands due to heat during operation, it drives the supporting arc plate 40 to approach the supporting tube 31. The supporting tube 31 is used to protect the water cooler 10. At the same time, the deformation of the high-temperature resistant flexible seal 20 is used to ensure the sealing effect of the gasifier, so that the supporting arc plate 40 can slide vertically relative to the supporting tube 31, thereby ensuring the service life of the upper water-cooled wall 80 and avoiding damage due to limited deformation when it expands due to heat. At the same time, the sealing effect is guaranteed to effectively prevent the water gas in the furnace from escaping to the interlayer.

[0037] Further explanation: the upper water-cooled wall 80 is arranged in sequence by a plurality of vertically arranged water pipes. In order to avoid a gap between two adjacent water pipes on the left and right and the outer wall of the supporting arc plate 40 causing sealing failure, the gap needs to be blocked.

[0038] At this time, a sealing block 41 can be selected to be welded between the adjacent left and right sides, that is, the supporting arc plate 40 is connected to the peripheral side wall of the upper water-cooled wall 80 through the sealing block 41, and the curvature of the supporting arc plate 40 matches the curvature of the upper water-cooled wall 80, thereby improving the tightness of the connection and ensuring the reliability of the sealing structure.

[0039] Preferably, the sealing block 41 is an L-shaped structure, and the long side of the sealing block 41 is connected to the corresponding supporting arc plate 40, preferably fixedly connected; the short side of the sealing block 41 extends between two pipes on the upper water-cooled wall 80, and the short side of the sealing block 41 is fixedly connected to the two adjacent pipes.

[0040] Since the support arc plate 40 will expand due to heat along with the upper water-cooled wall 80 during operation, in order to avoid limited displacement of the support arc plate 40, the number of the support arc plates 40 can be selected to be multiple; taking three as an example, the central angle of each support arc plate 40 is 120°, and the three support arc plates 40 are evenly spaced and arranged on the outside of the support tube 31.

[0041] Similarly, the longitudinal cross-section of the water cooler 10 along its axis is a "J"-shaped structure, which is surrounded by upper and lower stacked coils. A refractory layer 50 is provided on the inner wall of the water cooler 10. The refractory layer 50 extends from the inner wall of the water cooler 10 to the outside of the water cooler folded cofferdam. The refractory layer 50 contacts the bottom of the support tube 31, thereby improving the service life of the water cooler 10.

[0042] Among them, the support tube 31 is sleeved on the outside of the return cofferdam of the water cooler 10, and the top of the support tube 31 extends to the top of the return cofferdam. In order to avoid the sealing failure caused by the gap between the upper and lower coils at the return cofferdam and the support tube 31, the bottom of the support tube 31 is welded to the outer wall of the coil at the corresponding position of the return cofferdam; at the same time, the coil at the top of the return cofferdam is welded to the inner wall of the support tube 31 to ensure reliable sealing.

[0043] Furthermore, in order to prevent the water cooler 10 from causing failure of the welding position during deformation, a sealing plate 34 is further selected to be welded between the upper and lower adjacent coils at the corresponding position of the inner wall of the support tube 31 to provide a sealing effect for the water cooler 10 to meet actual work requirements.

[0044] To further explain, by sleeve-mounting the bottom support ring 33 on the bottom of the support tube 31 and utilizing the contact between the bottom support ring 33 and the bottom of the high temperature resistant flexible seal 20, the downward deviation of the high temperature resistant flexible seal 20 is limited, thereby protecting the high temperature resistant flexible seal 20 and preventing the high temperature resistant flexible seal 20 from falling off due to squeezing during operation, thereby causing failure of the seal and damage to the equipment.

[0045] Preferably, the bottom support ring 33 is fixedly connected to the support tube 31 , so as to achieve reliable protection of the sealing of the high temperature resistant flexible seal 20 .

[0046] Further explanation: in order to avoid the bottom support ring 33 from hindering the deformation of the water cooler 10 and the upper water-cooled wall 80, the thickness of the bottom support ring 33 is preferably smaller than the thickness of the high-temperature resistant flexible seal 20, and the ratio of the thickness of the bottom support ring 33 to the thickness of the high-temperature resistant flexible seal 20 is 1:(1.5~1.6), preferably 1:1.58; at the same time, the bottom support ring 33 is fixedly connected to the support tube 31, so that the high-temperature resistant flexible seal 20 can be reliably supported when the distance between the water cooler 10 and the upper water-cooled wall 80 increases.

[0047] Similarly, the top pressure ring 32 is sleeved on the top of the support tube 31 to prevent the high temperature resistant flexible seal 20 from deviating upward and falling off during operation.

[0048] At the same time, the top pressure ring 32 is located between the outer wall of the support tube 31 and the inner wall of the support arc plate 40. The distance between the outer wall of the top pressure ring 32 and the inner wall of the support arc plate 40 and the distance between the inner wall of the top pressure ring 32 and the outer wall of the support tube 31 are both 2mm to 4mm, preferably 3mm. By reserving a movable gap on both sides of the top pressure ring 32, the top pressure ring 32 can adapt to the working state where the distance between the water cooler 10 and the upper water-cooled wall 80 is increased, and is also suitable for the working state where the distance between the water cooler 10 and the upper water-cooled wall 80 is reduced, thereby avoiding obstruction to the deformation of the water cooler 10 and the upper water-cooled wall 80 and ensuring stable and reliable use.

[0049] The top pressure ring 32 is preferably movably connected to the support tube 31, so that after the high-temperature resistant flexible seal 20 is squeezed and deformed upward, the top pressure ring 32 can be offset upward with the high-temperature resistant flexible seal 20 to avoid affecting the deformation of the high-temperature resistant flexible seal 20, and can also ensure that the high-temperature resistant flexible seal 20 recovers under the squeezing of the top pressure ring 32 after the expansion of the upper water-cooled wall 80 is eliminated.

[0050] Further explanation, in order to disassemble the high temperature resistant flexible seal 20 during maintenance and inspection, the top pressure ring 32 is preferably detachably connected to the support tube 31, so that the high temperature resistant flexible seal 20 can be replaced by removing the top pressure ring 32, which is simple to operate and improves work efficiency.

[0051] Specifically, the top pressure ring 32 is connected to the support tube 31 through a pressure ring connecting mechanism 60 , and the pressure ring connecting mechanism 60 includes a first pressure ring plate 61 , a second pressure ring plate 62 and a disassembly connector 63 .

[0052] The first pressure ring plate 61 is connected to the top of the support tube 31, the support tube 31 is sleeved on the outside of the first pressure ring plate 61 and welded to the first pressure ring plate 61, the top of the top pressure ring 32 extends to the top of the first pressure ring plate 61, the second pressure ring plate 62 is connected to the top of the top pressure ring 32, the top pressure ring 32 is sleeved on the outside of the second pressure ring plate 62 and welded to the second pressure ring plate 62, the second pressure ring plate 62 is located above the first pressure ring plate 61, and the second pressure ring plate 62 is detachably connected to the first pressure ring plate 61 by disassembling the connecting piece 63; the disassembling connecting piece 63 can be optionally a bolt or a snap.

[0053] During maintenance and overhaul, the top pressure ring 32 is disassembled through the pressure ring connecting mechanism 60, which is simple and convenient to operate.

[0054] At the same time, in order to further facilitate disassembly, it is preferred to set a disassembly auxiliary seat 70 on the top end face of the second pressure ring plate 62, and open a lifting hole on the disassembly auxiliary seat 70 to facilitate maintenance and replacement by lifting through external equipment, thereby reducing the difficulty and cost of manual operation and improving work efficiency.

[0055] The material of the sealing plate 34, the material of the sealing block 41, the material of the packing pressure plate 30 and the material of the pressure ring connecting mechanism 60 can all be selected as S31603.

[0056] Example 2

[0057] Based on the semi-waste boiler gasifier water cooler sealing device of Example 1, this embodiment provides a semi-waste boiler gasifier water cooler sealing method, comprising the following steps:

[0058] S1. Arrange a refractory layer 50 on the water cooler 10;

[0059] Specifically, refer to Figure 2 , the refractory layer 50 is coated on the outside of the water cooler return cofferdam to improve the service life of the water cooler 10; the refractory layer 50 is further preferably coated from the bottom of the water cooler return cofferdam to the middle position of the outside of the water cooler return cofferdam.

[0060] S2, welding a sealing plate 34 between two adjacent layers of coils, and welding a sealing block 41 between two adjacent water pipes;

[0061] Specifically, a sealing plate 34 is welded at the top of the water cooler return cofferdam. The sealing plate 34 is welded between two upper and lower adjacent layers of coils. The sealing plate 34 is sleeved on the water cooler return cofferdam to improve the sealing effect.

[0062] S3, laying the supporting arc plate 40 according to the curvature of the inner wall of the upper water-cooled wall 80 and welding it to the sealing block 41;

[0063] Specifically, when welding the support arc plate 40 , the support arc plate 40 is fitted to the inner wall of the upper water-cooled wall 80 , so that the expansion and contraction of the upper water-cooled wall 80 can be more closely fitted to the support arc plate 40 , and both are more evenly stressed, ensuring stable and reliable use.

[0064] Further preferably, in order to improve the connection reliability between the upper water-cooled wall 80 and the supporting arc plate 40 , the supporting arc plate 40 is connected to the upper water-cooled wall 80 through a sealing block 41 .

[0065] The sealing block 41 is an L-shaped structure. The end of the short side of the sealing block 41 is welded between two adjacent water pipes on the left and right. The long side of the sealing block 41 is vertically arranged and welded to the supporting arc plate 40. There are multiple sealing blocks 41, and the number of sealing blocks 41 can be an integer multiple of the supporting arc plates 40, so that each supporting arc plate 40 is connected to the upper water-cooled wall 80 through the same number of sealing blocks 41.

[0066] S4, sleeve the support tube 31 on the outside of the folded cofferdam of the water cooler, and weld the bottom end and the top end of the support tube 31 to the coils at corresponding positions respectively;

[0067] Specifically, the support tube 31 is sleeved on the outside of the folded cofferdam of the water cooler so that the bottom of the support tube 31 contacts the top of the refractory layer 50 , and the support tube 31 is sleeved on the outside of the sealing block 41 .

[0068] At the same time, the bottom of the support tube 31 is welded to the coil at the corresponding position to ensure the connection sealing effect between the support tube 31 and the water cooler 10; and the coil at the top of the water cooler folded cofferdam is welded to the corresponding position of the inner wall of the support tube 31 to further provide the connection sealing effect between the support tube 31 and the water cooler 10.

[0069] S5, weld the bottom support ring 33 to the outside of the support tube 31, weld the first pressure ring plate 61 to the top of the support tube 31, weld the second pressure ring plate 62 to the top pressure ring 32, and connect the disassembly auxiliary seat 70 to the top of the second pressure ring plate 62;

[0070] Specifically, the bottom support ring 33 is sleeved from bottom to top on the bottom of the outer side of the support tube 31 , and then the bottom of the bottom support ring 33 is welded to the corresponding position of the support tube 31 to ensure the stable connection of the bottom support ring 33 .

[0071] Next, the first pressure ring plate 61 is overlapped at the top position of the support tube 31 , and the top of the support tube 31 is welded to the side wall of the first pressure ring plate 61 .

[0072] Among them, the second pressure ring plate 62 is welded to the top pressure ring 32 in advance, and the disassembly auxiliary seat 70 is welded to the top of the second pressure ring plate 62 in advance; when used later, the first pressure ring plate 61 can be directly sleeved on the outside of the top of the support tube 31, and the second pressure ring plate 62 is located above the first pressure ring plate 61.

[0073] At the same time, in order to ensure reliable connection of the disassembly connector 63, it is preferred that the second pressure ring plate 62 and the first pressure ring plate 61 are stacked and drilled at the same time to ensure the coaxiality of the drilled holes.

[0074] S6, filling the high temperature resistant flexible seal 20 between the supporting arc plate 40 and the supporting tube 31, and making the bottom of the high temperature resistant flexible seal 20 contact with the bottom supporting ring 33;

[0075] Specifically, after completing the welding of the bottom support ring 33, fill the high temperature resistant flexible seal 20 between the support arc plate 40 and the support tube 31 so that the high temperature resistant flexible seal 20 is in contact with the bottom support ring 33, while ensuring that the top of the high temperature resistant flexible seal 20 is located below the top of the support tube 31 to prevent the high temperature resistant flexible seal 20 from extending to the outside of the support tube 31.

[0076] S7, vertically extend the top pressure ring 32 between the supporting arc plate 40 and the supporting tube 31 and contact the top of the high temperature resistant flexible seal 20, and then use the disassembly connector 63 to connect the first pressure ring plate 61 and the second pressure ring plate 62.

[0077] Specifically, take out the welded top pressure ring 32 and the second pressure ring plate 62, and then put the bottom of the top pressure ring 32 between the support tube 31 and the support arc plate 40, so that the bottom end of the top pressure ring 32 contacts the top of the high temperature resistant flexible seal 20, and the second pressure ring plate 62 is located above the first pressure ring plate 61. Finally, the first pressure ring plate 61 and the second pressure ring plate 62 are connected by disassembling the connecting piece 63.

[0078] It can not only allow the high temperature resistant flexible seal 20 to expand upward after being squeezed, but also prevent the high temperature resistant flexible seal 20 from falling off the outside of the support tube 31, thereby ensuring its stable use and reliable sealing effect.

[0079] During disassembly, the high temperature resistant flexible sealing member 20 can be conveniently dismantled and replaced by only removing the disassembly connector 63 , which is easy to operate.

[0080] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the present invention.

Claims

1. A sealing device for a water cooler of a semi-waste boiler gasifier, characterized in that: It comprises a high temperature resistant flexible seal (20) arranged between a water cooler (10) and an upper water cooling wall (80), a packing pressure plate (30) connected to the water cooler (10), and a supporting arc plate (40) sleeved on the outside of the high temperature resistant flexible seal (20); The packing pressure plate (30) comprises a support tube (31), a top pressure ring (32) and a bottom support ring (33); The support tube (31) is sleeved on the outside of the water cooler (10) and is sealed and connected to the water cooler (10); the high temperature resistant flexible seal (20), the top pressure ring (32) and the bottom support ring (33) are all arranged between the support arc plate (40) and the support tube (31); the bottom support ring (33) is sleeved on the outside of the support tube (31) and is connected to the support tube (31); the bottom support ring (33) is in contact with the bottom of the high temperature resistant flexible seal (20); one end of the top pressure ring (32) is in contact with the top of the high temperature resistant flexible seal (20); and the other end of the top pressure ring (32) is connected to the support tube (31).

2. The sealing device for water cooler of semi-waste boiler gasifier according to claim 1, characterized in that: The ratio of the thickness of the bottom support ring (33) to the thickness of the high temperature resistant flexible seal (20) is 1:(1.5-1.6), and the distance between the outer wall of the top pressure ring (32) and the inner wall of the support arc plate (40) and the distance between the inner wall of the top pressure ring (32) and the outer wall of the support tube (31) are both 2 mm to 4 mm.

3. The sealing device for water cooler of semi-waste boiler gasifier according to claim 2, characterized in that: There are a plurality of supporting arc plates (40), and the plurality of supporting arc plates (40) are arranged circumferentially around the axis of the upper water-cooled wall (80).

4. The sealing device for water cooler of semi-waste boiler gasifier according to claim 3, characterized in that: The supporting arc plate (40) is sealedly connected to the upper water-cooled wall (80) via a sealing block (41); the upper water-cooled wall (80) comprises a plurality of water pipes arranged vertically in parallel; one end of the sealing block (41) is sealedly connected between two adjacent water pipes; the other end of the sealing block (41) is sealedly connected to the outer wall of the supporting arc plate (40); the sealing block (41) is located above the supporting arc plate (40).

5. The sealing device for water cooler of semi-waste boiler gasifier according to claim 4, characterized in that: The water cooler (10) is provided with a refractory layer (50), and the refractory layer (50) extends from the inner wall of the water cooler (10) to the outside of the return cofferdam. The support tube (31) is sleeved on the outside of the return cofferdam, and the support tube (31) is located above the refractory layer (50). The return cofferdam includes multiple layers of coils wound from bottom to top, and the bottom and upper ends of the support tube (31) are welded to the coils at closely corresponding positions of the return cofferdam.

6. The sealing device for water cooler of semi-waste boiler gasifier according to claim 5, characterized in that: The inner wall of the support tube (31) is also sealed and connected to the return cofferdam via a sealing plate (34), and the sealing plate (34) is fixedly arranged between two adjacent layers of coils.

7. The sealing device for water cooler of semi-waste boiler gasifier according to claim 6, characterized in that: The support tube (31) is connected to the top pressure ring (32) through a pressure ring connecting mechanism (60); the pressure ring connecting mechanism (60) includes a first pressure ring plate (61), a second pressure ring plate (62) and a disassembly connection piece (63); the support tube (31) is sleeved on the outer side of the first pressure ring plate (61) and connected to the first pressure ring plate (61); the top pressure ring (32) is sleeved on the outer side of the second pressure ring plate (62) and connected to the top pressure ring (32); the second pressure ring plate (62) is located above the first pressure ring plate (61); the first pressure ring plate (61) is located above the return cofferdam; the first pressure ring plate (61) is disassembly connected to the second pressure ring plate (62) through the disassembly connection piece (63).

8. The sealing device for water cooler of semi-waste boiler gasifier according to claim 7, characterized in that: A disassembly auxiliary seat (70) is provided on the top of the second pressure ring plate (62).

9. The sealing device for water cooler of semi-waste boiler gasifier according to claim 8, characterized in that: The material of the sealing plate (34), the material of the sealing block (41), the material of the packing pressure plate (30) and the material of the pressure ring connecting mechanism (60) are all S31603, and the high temperature resistant flexible sealing component (20) is a graphite packing.

10. A method for sealing a water cooler of a semi-waste boiler gasifier, characterized in that: The sealing device for the water cooler of the semi-waste boiler gasifier according to claim 8 comprises the following steps: S1. Arranging a fire-resistant layer (50) on the water cooler (10); S2, welding a sealing plate (34) between two adjacent layers of coils, and welding a sealing block (41) between two adjacent water pipes; S3, laying the supporting arc plate (40) according to the curvature of the inner wall of the upper water-cooled wall (80) and welding it to the sealing block (41); S4, sleeve the support tube (31) on the outside of the return cofferdam of the water cooler, and weld the bottom end and the top end of the support tube (31) to the coils at corresponding positions respectively; S5, welding the bottom support ring (33) to the outside of the support tube (31), welding the first pressure ring plate (61) to the top of the support tube (31), welding the second pressure ring plate (62) to the top pressure ring (32), and connecting the disassembly auxiliary seat (70) to the top of the second pressure ring plate (62); S6, inserting the high temperature resistant flexible seal (20) between the supporting arc plate (40) and the supporting tube (31), and making the bottom of the high temperature resistant flexible seal (20) contact with the bottom supporting ring (33); S7, vertically extend the top pressure ring (32) between the supporting arc plate (40) and the supporting tube (31) and contact the top of the high temperature resistant flexible seal (20), and then use the disassembly connector (63) to connect the first pressure ring plate (61) and the second pressure ring plate (62).

Images