A protective lining structure for a four-nozzle water-coal slurry gasifier supporting brick plate

Abstract

A protective lining structure for a brick support plate of a four-nozzle water-coal slurry gasifier relates to a gasifier structure, comprising a brick support plate and a backing brick layer, a heat-insulating brick layer and a hot brick layer arranged outside the brick support plate, wherein the heat-insulating brick layer, the backing brick layer and the hot brick layer are arranged on the outside of a fiber plastic layer in sequence from the inside to the outside; the backing brick layer is composed of multiple layers of backing bricks, and the backing brick A located at the brick support plate is set in a "concave" shape, the opening of the "concave" shape is arranged toward the fiber plastic layer, and the inner end face of the backing brick A contacts the outer side face of the fiber plastic layer, the brick support plate is arranged in the "concave" shaped opening, the inner end of the brick support plate is arranged flush with the inner side face of the fiber plastic layer, and fiber blankets are arranged on the upper side, outer end face and lower side of the brick support plate; the utility model has a simple structure, can reduce the over-temperature phenomenon of the brick support plate and its corresponding furnace shell, reduce the number of start-up, shutdown, overhaul, replacement and furnace baking, and improve the use efficiency of the gasifier.

Description

Technical Field

[0001] The utility model relates to a gasification furnace structure, in particular to a protective lining structure of a supporting brick plate of a four-nozzle water-coal slurry gasification furnace. Background Art

[0002] As is known, since the four-nozzle pressurized gasification furnace has a large vertical dimension, it is necessary to consider the expansion of the refractory lining under hot conditions. Usually, a support brick plate is used to arrange the lining structure in sections, and expansion joints are provided between the refractory linings of different sections. The function of the expansion joints is mainly to buffer the expansion of the lower section of the refractory lining and avoid extrusion damage to the refractory lining material.

[0003] The expansion joint of the gasifier is a weak link. Due to the high temperature and pressure in the gasifier and the presence of highly corrosive gases, and the high-chromium material here is more susceptible to erosion than other parts, the brick joints here are easily broken through by the gas in the furnace, resulting in the brick support plate not being well protected, and then the furnace shell in this part overheats and is forced to stop for inspection and replacement; domestic technical workers have also conducted a lot of research and structural improvement work, but they all face a problem. The fiber material is only filled between the brick support mechanism and the hot surface bricks in the front section. When the lining material in the furnace at the brick support structure expands upward due to heat, due to factors such as surface slag, when the furnace body cools down, the several rings of bricks below the gas channel cannot go back. The expansion joint channel originally located on the upper part of the brick support plate will be pulled out in the horizontal brick joints of the several rings of bricks below the brick support plate, especially when the opened gap is on the same horizontal line as the brick support mechanism and the fiber material, it is easy for gas blowby to overfire and cause the temperature of the brick support mechanism to rise. Summary of the invention

[0004] In order to overcome the deficiencies in the background technology, the utility model discloses a protective lining structure of a supporting brick plate of a four-nozzle water-coal slurry gasifier.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0006] A protective lining structure of a brick support plate of a four-nozzle water-coal slurry gasifier comprises a brick support plate and a backing brick layer, a heat-insulating brick layer and a hot surface brick layer arranged outside the brick support plate, wherein the heat-insulating brick layer, the backing brick layer and the hot surface brick layer are arranged on the outside of a fiber plastic layer in sequence from the inside to the outside; the backing brick layer is composed of multiple layers of backing bricks, the backing brick A located at the brick support plate is arranged in a "concave" shape, the opening of the "concave" shape is arranged toward the fiber plastic layer, and the inner end surface of the backing brick A contacts the outer side surface of the fiber plastic layer, the brick support plate is arranged in the "concave" shaped opening, the inner end of the brick support plate is arranged flush with the inner side surface of the fiber plastic layer, and fiber blankets are arranged on the upper side, outer end surface and lower side of the brick support plate.

[0007] The protective lining structure of the four-nozzle water-coal slurry gasifier support brick plate, the hot surface brick layer is composed of multiple layers of hot surface bricks, and the hot surface brick C located at the bottom is arranged flush with the backing brick A and the backing brick D below the backing brick A.

[0008] The protective lining structure of the support brick plate of the four-nozzle water-coal slurry gasifier is provided with multiple layers of insulation bricks on the upper inner side of the backing brick A, and multiple backing bricks B are provided on the upper outer side in a stepped shape from bottom to top. The multiple backing bricks B and the corresponding multiple hot surface bricks B on the outer side form a shoulder structure, and expansion joints are provided at the shoulder locations.

[0009] The protective lining structure of the four-nozzle water-coal slurry gasifier support brick plate is characterized in that the outer sides of two backing bricks C arranged on the upper part of multiple backing bricks B are groove-shaped, the inner end of the hot surface brick D located on the upper part of the hot surface brick B is arranged in the groove, and a hot surface brick A is provided on the upper part of the hot surface brick D.

[0010] The protective lining structure of the supporting brick plate of the four-nozzle water-coal slurry gasifier is provided with an expansion joint between the hot surface bricks B and the hot surface bricks D.

[0011] The protective lining structure of the four-nozzle water-coal slurry gasifier brick support plate has a fiber blanket thickness of 2-4 mm on the brick support plate and a fiber blanket thickness of 15-25 mm on the outer end surface and below the brick support plate.

[0012] The protective lining structure of the supporting brick plate of the four-nozzle water-coal slurry gasifier is that the hot surface brick layer is a high-chrome brick, the backing brick layer is a low-chrome brick, and the insulation brick layer is a hollow ball brick.

[0013] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0014] The protective lining structure of the brick support plate of the four-nozzle water-coal slurry gasifier described in the utility model, by arranging the "concave"-shaped backing brick A, surrounds the entire brick support plate in the backing brick A, blocks the acidic gas, and prevents the acidic gas from breaking through the weak parts of the hot surface bricks B and the hot surface bricks C in the later period of use, thereby forming a gas channel, and then the excessive gas blowby causes the brick support mechanism to overheat; the utility model has a simple structure and avoids the situation where the temperature of the brick support mechanism increases due to excessive gas blowby. The protective lining structure can reduce the overheating of the brick support plate and its corresponding furnace shell, reduce the number of start-up, shutdown, maintenance, replacement and furnace baking, improve the use efficiency of the gasifier, and avoid unnecessary waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] In the figure: 1. hot surface brick layer; 2. backing brick layer; 3. insulation brick layer; 4. fiber plastic layer; 5. brick support plate; 6. fiber blanket; 7. backing brick A; 8. backing brick B; 9. backing brick C; 10. hot surface brick A; 11. hot surface brick B; 12. hot surface brick C; 13. backing brick D; 14. insulation brick; 15. gas channel; 16. hot surface brick D. DETAILED DESCRIPTION

[0017] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0018] Combined with Figure 1 The protective lining structure of the brick support plate of the four-nozzle water-coal slurry gasifier comprises a brick support plate 5 and a backing brick layer 2, an insulation brick layer 3 and a hot brick layer 1 arranged outside the brick support plate 5, wherein the insulation brick layer 3, the backing brick layer 2 and the hot brick layer 1 are arranged on the outside of the fiber plastic layer 4 in sequence from the inside to the outside; the backing brick layer 2 is composed of multiple layers of backing bricks, and the backing brick A7 located at the brick support plate 5 is set in a "concave" shape, with the opening of the "concave" shape facing the fiber plastic layer 4, and the inner end surface of the backing brick A7 is aligned with the outer side surface of the fiber plastic layer 4. The brick support plate 5 is arranged in the "concave" shaped opening, the inner end of the brick support plate 5 is flush with the inner side surface of the fiber plastic layer 4, and a fiber blanket 6 is arranged on the upper side, outer end surface and lower side of the brick support plate 5; the thickness of the fiber blanket 6 arranged on the brick support plate 5 is set to 2-4mm, and the thickness of the fiber blanket 6 arranged on the outer end surface and lower side of the brick support plate 5 is 15-25mm; the hot surface brick layer 1 is composed of multiple layers of hot surface bricks, and the hot surface brick C12 at the lower part is flush with the backing brick A7 and the backing brick D13 under the backing brick A7 respectively.

[0019] Specifically, multiple layers of insulation bricks 14 are provided on the upper inner side of the backing brick A7, and multiple backing bricks B8 are provided on the upper outer side in a stepped shape from bottom to top. The multiple backing bricks B8 and the multiple hot facing bricks B11 corresponding to the outer side are in a shoulder structure, and expansion joints 15 are provided at the shoulder; the outer side surfaces of the two backing bricks C9 arranged on the upper part of the multiple backing bricks B8 are in a groove shape, the inner end of the hot facing brick D16 located on the upper part of the hot facing brick B11 is arranged in the groove, and a hot facing brick A10 is provided on the upper part of the hot facing brick D16.

[0020] Specifically, an expansion joint 15 is provided between the hot facing brick B11 and the hot facing brick D16.

[0021] Specifically, the hot face brick layer 1 is a high-chrome brick, the backing brick layer 2 is a low-chrome brick, and the insulation brick layer 3 is a hollow ball brick.

[0022] The protective lining structure of the supporting brick plate of the four-nozzle water-coal slurry gasifier described in the utility model is implemented. Before bricklaying, the center line of the furnace body is first found. Taking the axial center line as the reference, the fiber plastic layer 4, the insulation brick layer 3, the backing brick layer 2 and the hot face brick layer 1 are sequentially laid from the furnace shell to the furnace chamber. The bricks are laid accurately according to the specified diameter of each ring brick. When the backing brick A7 is laid, the supporting brick plate 5 is wrapped with a fiber blanket 6 and inserted into the "concave" shaped opening of the backing brick A7. The supporting brick plate 5 is surrounded by low-chrome bricks to block the acidic gas in the high-temperature gas and prevent the erosion of the fiber blanket. When laying the hot face bricks D16, hot face bricks B11 and the backing bricks B8 and C9, expansion joints 15 are reserved. Then, according to conventional masonry requirements, other materials are laid until the furnace is completed.

[0023] The parts not described in detail in this utility model are prior art.

[0024] The embodiments selected in this article for the purpose of disclosing the invention of the utility model are currently considered to be suitable, but it should be understood that the utility model is intended to include all changes and improvements of the embodiments that belong to the scope of the present concept and utility model.

Claims

1. A protective lining structure of a brick support plate of a four-nozzle water-coal slurry gasifier, comprising a brick support plate and a backing brick layer, a heat-insulating brick layer and a hot surface brick layer arranged outside the brick support plate, characterized in that: The insulation brick layer, backing brick layer and hot surface brick layer are arranged in sequence on the outside of the fiber plastic layer from the inside to the outside; the backing brick layer is composed of multiple layers of backing bricks, and the backing brick A located at the brick supporting plate is set in a "concave" shape, the opening of the "concave" shape is set toward the fiber plastic layer, and the inner end surface of the backing brick A is in contact with the outer side surface of the fiber plastic layer, the brick supporting plate is set in the "concave" opening, and the inner end of the brick supporting plate is flush with the inner side surface of the fiber plastic layer, and fiber blankets are provided on the upper side, outer end surface and lower side of the brick supporting plate.

2. The protective lining structure of the supporting brick plate of the four-nozzle water-coal slurry gasifier according to claim 1 is characterized by: The hot facing brick layer is composed of multiple layers of hot facing bricks, and the hot facing bricks C located at the bottom are arranged flush with the backing bricks A and the backing bricks D below the backing bricks A.

3. The protective lining structure of the supporting brick plate of the four-nozzle water-coal slurry gasifier according to claim 1 is characterized by: Multiple layers of insulation bricks are arranged on the upper inner side of the backing brick A, and multiple backing bricks B are arranged on the upper outer side in a stepped shape from bottom to top. The multiple backing bricks B and the corresponding multiple hot surface bricks B on the outer side form a shoulder structure, and expansion joints are arranged at the shoulders.

4. The protective lining structure of the supporting brick plate of the four-nozzle water-coal slurry gasifier according to claim 3 is characterized by: The outer side surfaces of two backing bricks C arranged on the upper part of the plurality of backing bricks B are in a groove shape, the inner end of the hot facing brick D located on the upper part of the hot facing brick B is arranged in the groove, and the hot facing brick A is arranged on the upper part of the hot facing brick D.

5. The protective lining structure of the supporting brick plate of the four-nozzle water-coal slurry gasifier according to claim 4 is characterized by: An expansion joint is provided between the hot facing brick B and the hot facing brick D.

6. The protective lining structure of the supporting brick plate of the four-nozzle water-coal slurry gasifier according to claim 1 is characterized by: The thickness of the fiber blanket arranged on the brick supporting plate is set to 2-4 mm, and the thickness of the fiber blanket arranged on the outer end surface and the bottom of the brick supporting plate is 15-25 mm.

7. The protective lining structure of the supporting brick plate of the four-nozzle water-coal slurry gasifier according to claim 1 is characterized by: The hot surface brick layer is high-chrome brick, the backing brick layer is low-chrome brick, and the insulation brick layer is hollow ball brick.

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