Plugging brick for preheating opening of vault of coal gasifier

Abstract

The utility model discloses a plugging brick for a preheating port of a coal gasifier vault, which comprises a castable cylinder, a cone and internal parts thereof. The lower part of the cylinder is provided with a plane seal and an arc-shaped surface seal, and the conical surface is provided with two conical seals. The internal part can enhance the anti-drawing force of the furnace brick and prevent the plugging brick from being broken from the middle part; the arc-shaped sealing contact area is large, the blocking brick can be better locked, a small gap is reserved in the front end conical surface, disassembly is convenient, the rear end conical surface is closely attached to the vault, and the situation that the vault position is subjected to blow-by and overtemperature, and vault bricks are damaged is effectively prevented. The plugging brick which is low in cost, high in strength, resistant to drawing and multiple in sealing is applied to vault plugging of a multi-nozzle gasification furnace, and is convenient to mount and dismount and good in sealing effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the coal gasification technical field, concretely relates to a coal gasification furnace arch top preheating mouth plugging brick. BACKGROUND

[0002] The heat insulation type gasification furnace hearth mainly relies on the refractory material and the heat preservation layer to insulate heat, reduces the heat loss to the outside, the furnace top is provided with the preheating burner mouth, the furnace brick preheating in the furnace is carried out through the combustion natural gas, before feeding, this preheating mouth must be plugged, guarantees the airtight safety stable operation of gasification furnace. Current existence following question: first, when the surface appears the crack in the heating box heating before the plugging brick installation, second, after the installation, the plugging brick and the preheating mouth sealing surface joint place is easy to leak, third, after the shutdown, again pull out, often pull the plugging brick, the broken position is the front end of the conical surface of the plugging brick, after the fracture, the residual plugging brick must be broken by the machine, in the breaking process, even the high chromium brick around the preheating mouth is damaged. SUMMARY

[0003] The utility model solves the technical problem that provide a kind of coal gasification furnace arch top preheating mouth plugging brick, can effectively seal, insulate high temperature, easy to corrode medium leakage, again convenient to dismantle, save manpower.

[0004] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0005] A kind of coal gasification furnace arch top preheating mouth plugging brick, including the plugging brick of integrative plugging brick including columnar portion and cone portion by castable pouring, and in the pouring process, the steel bar, the fixed connection nail and the reinforcing rib in columnar portion and cone portion are placed inside.

[0006] The length of the cone portion is greater than that of the columnar portion, and the cone portion includes a conical sealing surface one and a conical sealing surface two.

[0007] The conical sealing surface one and the conical sealing surface two are connected by a transition portion with a taper angle of 3-5°. The front end conical surface (conical sealing surface two) is provided with a small gap for easy disassembly, and the rear end conical surface (conical sealing surface one) is closely attached to the preheating mouth brick, effectively preventing gas leakage at the arch top position, which can prevent the arch top brick from being damaged by overheating. The rear end conical surface is closely attached to the arch top brick to prevent high-temperature gas leakage.

[0008] The two ends of the connection between the columnar portion and the cone portion are provided with flat sealing surfaces, and the middle of the flat sealing surface is provided with an arc convex sealing surface. The arc convex sealing surface can lock the plugging brick, and the flat sealing surface is more stable.

[0009] The three sections of the reinforcing bars are provided at the column body part and the cone body part, the lowermost section is arranged at the lower part of the cone body part, the middle section is arranged at the joint of the column body part and the cone body part, and the uppermost section is arranged at the middle section of the column body part, and the reinforcing bars are uniformly distributed in three directions.

[0010] The reinforcing bars are arranged at the positions of the reinforcing bars of the lowermost section and the middle section.

[0011] The reinforcing bars are long reinforcing bars and short reinforcing bars arranged at the two ends of the reinforcing bars of the lowermost section and the middle section at equal distances.

[0012] The sealing brick is provided with a lifting ring, and the lifting ring is fixed with the reinforcing bars.

[0013] The gasification furnace dome preheating port sealing brick has the advantages that the sealing brick is combined with the preheating port dome brick at multiple sealing surfaces during installation, and air leakage is not easy to occur; the sealing brick is easy to disassemble during disassembly, and the preheating port surrounding dome bricks are not damaged. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The utility model relates to a kind of coal gasification furnace dome preheating port sealing brick overall schematic view;

[0015] In the drawing: 1, grab nail; 2, reinforcing bar; 3, lifting ring; 4, castable; 5, arc convex sealing surface; 6, plane sealing surface; 7, conical sealing surface one; 8, conical sealing surface two. DETAILED DESCRIPTION

[0016] The utility model is shown as a kind of coal gasification furnace dome preheating port sealing brick, including cylinder, conical body and its internal parts.

[0017] As Figure 1 In the middle, a kind of coal gasification furnace dome preheating port sealing brick, including using castable 4 pouring into the sealing brick containing column body part and cone body part integration, and in the pouring process, built-in column body part and cone body part using reinforcing bar, with reinforcing bar fixed connection grab nail 1 and reinforcing bar 2.

[0018] The length of the cone body part is greater than that of the column body part, and the cone body part includes conical sealing surface one 7 and conical sealing surface two 8.

[0019] The transition from the first conical sealing surface to the second conical sealing surface has a 5° tapering angle.

[0020] The two ends of the connection between the columnar part and the conical part are respectively provided with flat sealing surfaces 6, and the middle of the flat sealing surfaces 6 is provided with an arc-shaped convex sealing surface 5.

[0021] The columnar part and the conical part are provided with three sections of the grab nails 1, the lowermost section is arranged at the lower part of the conical part, the middle section is arranged at the connection between the columnar part and the conical part, and the uppermost section is arranged at the middle section of the columnar part, and the grab nails 1 are uniformly distributed in three directions.

[0022] The lowermost section and the middle section are provided with the reinforcing ribs 2 at the positions of the grab nails.

[0023] The reinforcing ribs 2 are 6 long reinforcing ribs and 4 short reinforcing ribs which are arranged at both ends of the reinforcing ribs of the lowermost section and the middle section at equal distances.

[0024] The plugging brick is provided with a lifting ring 3, and the lifting ring is fixed with the reinforcing rib.

[0025] The grab nails 1 and the lifting ring 3 are welded as a whole, the grab nails 1 are divided into three sections, and the grab nails 1 are uniformly distributed in three directions. The reinforcing ribs 2 have two specifications of long and short, the two ends are staggered in height, are arranged at intervals in space around the grab nails 1, and are used in cooperation with the grab nails 1 to enhance the pull-out resistance of the castable 4. The castable 4 is provided with the arc-shaped convex sealing surface 5 and the flat sealing surface 6 at the lower part of the columnar body, and the castable 4 is provided with the front end conical surface 8 and the rear end conical surface 7 at the conical surface. After the plugging brick is vertically installed, the arc-shaped convex sealing surface 5, the flat sealing surface 6, the first conical sealing surface 7, the second conical sealing surface 8 and the sealing surface of the high-chromium brick around the preheating port are closely combined, multiple sealing is realized, and the sealing safety performance of the gasification is greatly improved, and the high-temperature gas leakage is prevented.

[0026] The above only describes the preferred embodiments of the present application, and is not limited thereto, and any modification made within the scope of the present application shall be included in the protection scope of the present application.

Claims

1. A gasifier dome preheat port plug brick characterized by, The sealing brick comprises a column part and a vertebral body part, and the column part and the vertebral body part are integrally formed by pouring casting material.

2. The arch top preheat port plug brick of a coal gasifier according to claim 1, wherein, The length of the vertebral body part is greater than that of the column part, and the vertebral body part comprises a first conical sealing surface and a second conical sealing surface. The first conical sealing surface and the second conical sealing surface are connected by a transition part with a 3-5° decreasing angle.

3. The arch top preheat port plug brick of a coal gasifier according to claim 1, wherein The two ends of the connection part between the column part and the vertebral body part are respectively provided with flat sealing surfaces, and the middle part of the flat sealing surfaces is provided with an arc convex sealing surface.

4. The arch top preheat port plug brick of a coal gasifier according to claim 1, wherein Three groups of steel bars are arranged in the column part and the vertebral body part, the lowermost group of steel bars is arranged at the lower part of the vertebral body part, the middle group of steel bars is arranged at the connection part between the column part and the vertebral body part, and the uppermost group of steel bars is arranged at the middle part of the column part, and the steel bars are uniformly distributed in three directions.

5. The gasifier dome preheat port plug brick of claim 4, wherein, The lowermost group of steel bars and the middle group of steel bars are provided with reinforcing bars.

6. The gasifier dome preheat port plug brick of claim 5, wherein, The reinforcing bars are long steel bars and short steel bars which are arranged at the two ends of the steel bars in the lowermost group and the middle group at equal distances.

7. The gasifier dome preheat port plug brick of claim 4, wherein, A lifting ring is arranged outside the sealing brick, and the lifting ring is fixed with the steel bars.

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