CN217535910U

CN217535910U - Heat recovery type coke oven gas collecting valve flashboard

Info

Publication number: CN217535910U
Application number: CN202221661986.3U
Authority: CN
Inventors: 丁毅; 孟晓东; 刘向勇; 汪琴
Original assignee: Jiangsu Longye Energy Saving Technology Co ltd
Current assignee: Jiangsu Longye Energy Saving Technology Co ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-10-04
Anticipated expiration: 2032-06-29

Abstract

The utility model provides a heat recovery formula coke oven gas collecting valve flashboard, including the main part, the welding of main part one side has the tortoise shell net, and the tortoise shell net forms a plurality of thermal-insulated chambeies with the main part cooperation, and a plurality of thermal-insulated chamber bottoms all bond has the ceramic paster, and the ceramic paster upper berth is equipped with first insulating layer, and the ceramic paster equals the thickness of tortoise shell net with the thickness of first insulating layer, and the coating of one side that the main part was kept away from to the tortoise shell net has the second insulating layer. The utility model provides a pair of heat recovery formula coke oven gas collecting valve flashboard, adopt and set up the ceramic paster in the tortoise shell net, and first insulating layer, at tortoise shell net surface coating second insulating layer, do the protection for the flashboard surface, receive strong hot washing under in the front, even the second insulating layer and the first insulating layer on surface drop to some extent, only need be in maintenance process, scratch the damaged material and remove, spray repair first insulating layer and second insulating layer again can, the flashboard hoist and mount back and forth has been reduced, the condition of production is delayed to the time-consuming and labor-consuming, great facility has been brought for coke oven fortune dimension.

Description

Heat recovery type coke oven gas collecting valve flashboard

Technical Field

The utility model relates to the technical field of heat recovery type coke ovens in the coal chemical industry, in particular to a gas collecting valve flashboard of a heat recovery type coke oven.

Background

A clean heat recovery coke oven (also called a non-recovery coke oven) is developed and developed on the basis of the heat recovery coke oven in the countries such as American and Australia and the like and on the basis of the mature experience at home and abroad. The furnace has the characteristics of small investment, less pollution, low operation cost, maintenance side expansion of coking coal resources and the like. But the operating temperature of the flue gas and air system is kept at 1350-1450 ℃ for a long time, and the requirements on the material of the shutter of the flue gas duct of the coke oven waste gas are higher. Conventional shutters are of three types: the pure cast iron flashboard, the composite flashboard (a carbon steel welding castable protective layer flashboard) and the stainless steel reinforcing steel bar are used as flashboards for casting and molding the bracket.

Although the cast iron gate plate is corrosion-resistant, not easy to deform and high-temperature resistant, the defect is obvious, firstly, the ablation resistance is poor, due to the limitation of site, the used gate plate is a non-standard product, is thin, needs sediment to open the mold, and has high brittleness and high rejection rate, and the manufacturing difficulty is relatively high.

The composite flashboard (the flashboard with the carbon steel welding castable protective layer) has the advantages of better ablation resistance, simpler manufacturing process, short manufacturing period, lower protection requirement in the transfer process and lower manufacturing cost; but the defects are also obvious, and firstly, the base material (carbon steel) is not corrosion-resistant and is easy to deform after overtemperature.

And the pouring type gate plate is made of pouring materials, wherein a framework is made of heat-resistant stainless steel with the length of more than 310 s. Although the heat resistance and deformation resistance of the fixed gate are improved, due to the fact that the gate is used for a long time, the castable is poor in periodic thermal shock resistance effect generally, and therefore internal framework materials are broken frequently to cause partial gates to be left in a flue, troubles are brought to later cleaning, and potential safety production hazards are brought.

The three types of flashboards are difficult to solve the problems of flashboard damage and short service life substantially, and the main reason is that the material of the flashboard cannot bear the high temperature or the irreversible damage caused by repeated thermal shock. Brings great trouble to the normal operation and maintenance of the coke oven.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that: in order to overcome the defects in the prior art, the utility model provides a heat recovery type coke oven gas collecting valve flashboard.

The utility model provides a technical scheme that its technical problem will adopt is: the utility model provides a heat recovery formula coke oven gas collecting valve flashboard, includes the main part, welding has the tortoise shell net main part one side, the tortoise shell net forms a plurality of thermal-insulated chambeies with the main part cooperation, a plurality of thermal-insulated chamber bottom all bonds and has ceramic paster, ceramic paster upper berth is equipped with first insulating layer, the thickness of ceramic paster plus first insulating layer equals the thickness of tortoise shell net, the one side coating that the main part was kept away from to the tortoise shell net has the second insulating layer.

Welding a tortoise-shell net on the main body to form a heat insulation cavity, bonding a ceramic patch in the heat insulation cavity by using a high-temperature bonding agent, and covering a first heat insulation layer on the ceramic patch, wherein the first heat insulation layer is flush with the outer edge of the tortoise-shell net; then a layer of second heat insulation layer is coated on the whole tortoise shell net, the outer surface of the outer gate plate is protected, and the integral heat insulation effect of the gate plate is guaranteed. Even if the front surface of the heat insulation structure is strongly hot-flushed, the second heat insulation layer and the first heat insulation layer on the surface of the heat insulation structure drop to some extent, and only the damaged materials are scratched in the overhauling process, and the first heat insulation layer and the second heat insulation layer are sprayed and repaired again.

Further, the main part adopts 15CrMo alloy steel to make, the welding of one side that the main part kept away from the tortoise shell net has S-shaped water-cooling pipe, water-cooling pipe water inlet end and play water end all are equipped with flange.

The cooling water is introduced into the water-cooling pipe, and the water-cooling pipe is welded with the main body, so that the heat exchange effect of the water-cooling pipe on the main body is improved, the whole flashboard is cooled, and the strength of main body steel is improved.

Further, reinforcing ribs for preventing the main body from deforming are arranged around the water cooling pipes. The reinforcing ribs are used for fixing the whole flashboard, so that the rigidity of the material is guaranteed against deformation.

Further, the first heat insulation layer is a vermiculite layer or a perlite layer.

Further, the thickness of the second heat insulation layer is 3-5 mm.

Further, the heat conductivity coefficient of the second heat insulation layer is not more than 0.06W/m.k. The heat insulation material of the second heat insulation layer adopts the formula provided in CN202111113112.4 in the third embodiment, the heat conductivity coefficient can reach 0.035W/m.k, and the heat insulation material has a good heat insulation effect.

The beneficial effects of the utility model are that: the utility model provides a heat recovery formula coke oven gas collecting valve flashboard adopts and sets up ceramic paster in the tortoise shell net to and the first insulating layer that constitutes by vermiculite layer or pearlite layer, at the second insulating layer of tortoise shell net surface coating 3-5mm thick, for the protection of flashboard surface, receive strong hot-flushing in the front, even the second insulating layer and the first insulating layer on surface drop to some extent, only need in the maintenance process, scratch the damaged material, spray repair first insulating layer and second insulating layer again can; the mode is convenient and reliable, the gate plate is prevented from being hoisted back and forth, the time and labor are saved, the production is delayed, and great convenience is brought to the normal operation and maintenance of the coke oven.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic view of the damper on the side near the flue;

FIG. 2 is a schematic diagram of the shutter with the second insulation layer removed from the side near the flue;

FIG. 3 is a schematic view of the structure of the ceramic patch, the first insulating layer and the tortoise shell net;

FIG. 4 is a schematic structural view of a side of the shutter close to the boiler.

In the figure: 1. the main part, 2, tortoise shell net, 201, thermal-insulated chamber, 3, ceramic paster, 4, first insulating layer, 5, second insulating layer, 6, water-cooling pipe, 7, strengthening rib.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

As shown in fig. 1-4, the utility model discloses a heat recovery formula coke oven gas collecting valve flashboard, including

main part

1, 1 one side of main part is nearly flue side, and the opposite side is nearly boiler side, 1 nearly flue side welding of main part has tortoise shell net 2, tortoise shell net 2 thickness is 1.5mm, tortoise shell net 2 forms a plurality of thermal-insulated chambeies 201 with 1 cooperation of main part, and is a plurality of thermal-insulated chamber 201 bottom all bonds and has ceramic paster 3, the ceramic paster 3 upper berth is equipped with first insulating layer 4, ceramic paster 3 equals the thickness of tortoise shell net 2 in addition the thickness of first insulating layer 4, the one side coating that main part 1 was kept away from to tortoise shell net 2 has second insulating layer 5.

The main part 1 adopts 15CrMo alloy steel to make, the welding of one side that main part 1 kept away from tortoise shell net 2 has S-shaped water-cooling pipe 6, water-cooling pipe 6 is intake and is all equipped with flange with the play water end.

And U-shaped reinforcing ribs 7 for preventing the main body 1 from deforming are arranged around the water cooling pipes 6.

The first heat insulation layer 4 is a vermiculite layer or a perlite layer.

The thickness of the second heat insulation layer 5 is 3-5 mm. The heat conductivity coefficient of the second heat insulation layer 5 is not more than 0.06W/m.k.

Directions and references (e.g., up, down, left, right, etc.) in the present disclosure may be used solely to aid in the description of the features in the figures. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the description, and the technical scope must be determined according to the scope of the claims.

Claims

1. A heat recovery type coke oven gas collecting valve flashboard is characterized in that: including main part (1), main part (1) one side welding has tortoise shell net (2), tortoise shell net (2) and main part (1) cooperation form a plurality of thermal-insulated chambeies (201), and is a plurality of thermal-insulated chamber (201) bottom all bonds has ceramic paster (3), ceramic paster (3) upper berth is equipped with first insulating layer (4), ceramic paster (3) are equal to the thickness of tortoise shell net (2) in the thickness of first insulating layer (4) in addition, the coating of one side that main part (1) was kept away from in tortoise shell net (2) has second insulating layer (5).

2. The shutter plate of the gas collecting valve of the heat recovery coke oven as claimed in claim 1, wherein: the main part (1) is made of 15CrMo alloy steel, an S-shaped water cooling pipe (6) is welded on one side, far away from the tortoise shell net (2), of the main part (1), and a water inlet end and a water outlet end of the water cooling pipe (6) are provided with connecting flanges.

3. The shutter of the gas collecting valve of the heat recovery coke oven as claimed in claim 2, wherein: and reinforcing ribs (7) for preventing the main body (1) from deforming are arranged around the water cooling pipes (6).

4. The gate plate of the gas collecting valve of the heat recovery coke oven as claimed in claim 1, wherein: the first heat insulation layer (4) is a vermiculite layer or a perlite layer.

5. The gate plate of the gas collecting valve of the heat recovery coke oven as claimed in claim 1, wherein: the thickness of the second heat insulation layer (5) is 3-5 mm.

6. The shutter of the gas collecting valve of the heat recovery coke oven as claimed in claim 5, wherein: the heat conductivity coefficient of the second heat insulation layer (5) is not more than 0.06W/m.k.