CN212199114U - Thermal shock resistant high-rigidity gas collecting pipe of waste heat recovery coke oven - Google Patents
Thermal shock resistant high-rigidity gas collecting pipe of waste heat recovery coke oven Download PDFInfo
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- CN212199114U CN212199114U CN202020521047.3U CN202020521047U CN212199114U CN 212199114 U CN212199114 U CN 212199114U CN 202020521047 U CN202020521047 U CN 202020521047U CN 212199114 U CN212199114 U CN 212199114U
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- pipe shell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The utility model discloses a thermal shock resistant high-rigidity gas collecting pipe of a waste heat recovery coke oven, which comprises a tubular surface heat fire-resistant layer built by refractory bricks, a pipe shell is arranged at the peripheral side of the surface heat fire-resistant layer, a ceramic fiber felt is laid on the pipe wall of the pipe shell, a wavy cushioning steel plate is arranged between the surface heat fire-resistant layer and the ceramic fiber felt, the cushioning steel plate and the peripheral surface of the surface heat fire-resistant layer form a thermal resistance cavity, and a honeycomb ceramic layer is filled between the cushioning steel plate and the ceramic fiber felt; a pipe shell supporting plate is supported below the pipe shell, and a pipe shell supporting rib plate is arranged on the outer side of the pipe shell supporting plate. The pipe shell supporting plate and the pipe shell supporting rib plates are arranged along the length direction of the pipe shell, and the three pipe shell supporting rib plates are arranged on the outer side of the pipe shell supporting plate. The tube shell support pallet has a support wrap angle α =90 ° -120 °, and the tube shell support ribs are located in the radial direction of the tube shell. The gas collecting pipe not only has higher thermal shock resistance and thermal insulation performance, but also has good integral supporting rigidity.
Description
Technical Field
The utility model relates to a clean heat recovery coke oven, in particular to a structural improvement of a heat recovery coke oven gas collecting pipe with high thermal shock resistance and high rigidity.
Background
The clean heat recovery coke oven can fully combust coke oven gas, chemical products and harmful substances generated in the coking process in the coke oven, recover the heat of high-temperature waste gas for power generation or other purposes, and the clean heat recovery coke oven is operated under the negative pressure of a coking chamber in the coking process, so that smoke dust is not leaked, pollutants are rarely generated, and clean production and environmental protection are realized. The clean heat recovery coke oven mainly comprises a carbonization chamber, a combustion chamber, a gas collecting pipe and other key parts, wherein the combustion chamber is positioned at the bottom of the carbonization chamber, high-temperature waste gas in the combustion chamber is conveyed to the gas collecting pipe and the gas collecting main pipe through an ascending flame path on the coke oven body, and finally the high-temperature waste gas is conveyed to a waste heat boiler to generate steam for power generation; the structure of the gas collecting branch pipe and the gas collecting main pipe and the heat preservation and resistance performance thereof have important influence on the high-efficiency utilization of the waste heat of the coke oven.
The structure of the gas collecting branch pipe and the gas collecting main pipe of the existing mostly clean type heat recovery coke oven is that one layer or two layers of heat insulation materials are lined in a pipe shell which is coiled by a steel plate, and the heat insulation materials are mainly aluminum silicate fiber folded blocks or calcium silicate plates and the like. Because the temperature of the waste gas conveyed by the gas collecting pipe is 1000 DEG0C is higher than C, even up to 13000C, and the waste gas contains water vapor and SO2Harmful corrosive gases such as CO; whether using aluminium silicate ceramic fibre form or notThe thermal insulation lining materials are easy to shrink in volume or fall off to generate crack gaps and poor turbulent flow scouring resistance by adopting the tamping pouring of the thermal insulation pouring materials, so that the erosion of harmful high-temperature waste gas to the thermal insulation lining materials and the steel pipe is aggravated, the service life and the thermal insulation performance of the gas collecting pipe are seriously influenced, the temperature of the flue gas entering the waste heat power generation boiler is reduced, and the waste heat of the coke oven cannot be efficiently utilized.
The gas collecting pipe is used for conveying high-temperature and rapid flue gas, the temperature difference between the inner side and the outer side of the pipe wall is large, the gas collecting pipe is subjected to large temperature gradient and temperature internal stress caused by the temperature gradient, and the cracking and even collapse of the pipe wall are easily caused, so that the conventional gas collecting pipe is insufficient in heat shock resistance and high thermal shock resistance, and the safe conveying of the high-temperature flue gas is directly influenced. The gas collecting pipe is long in conveying length, so that the gas collecting pipe is easy to bend and deform under the action of gravity, and particularly under the condition of high temperature, the bending can cause cracking of a pipeline, so that high-temperature gas is leaked, heat loss is caused, and environmental pollution is caused; the existing gas collecting pipe often adopts a method of a plurality of supporting seats to solve the problem of sagging and bending of the gas collecting pipe, but the method needs to occupy larger space and place, and the supporting seats are difficult to arrange on some special pipe distribution paths, so that the problem of sagging and bending of the gas collecting pipe is difficult to change.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a high-rigidity gas collecting pipe for thermal shock resistance of a waste heat recovery coke oven, which is not only provided with higher thermal shock resistance and thermal insulation performance, but also has good overall rigidity.
This solves the above technical problem, the utility model discloses a high rigidity gas collecting pipe of waste heat recovery coke oven thermal shock resistance, include and build by the firebrick and enclose into pipy face hot flame retardant coating, be provided with the tube at the periphery side of face hot flame retardant coating, spread on the pipe wall of tube and be equipped with ceramic fiber felt be provided with wavy bradyseism steel sheet between face hot flame retardant coating and the ceramic fiber felt, the bradyseism steel sheet forms heat-resisting cavity with face hot flame retardant coating outer peripheral face, packs between bradyseism steel sheet and the ceramic fiber felt and has the honeycomb ceramic layer; a pipe shell supporting plate is supported below the pipe shell, and a pipe shell supporting rib plate is arranged on the outer side of the pipe shell supporting plate.
In the structure, the bridge pipe channel is formed by building refractory bricks, so that the mechanical strength and the thermal shock resistance of the gas collecting pipe are enhanced, a high-resistance structure is formed, the heat preservation and insulation effects of the gas collecting pipe are improved, and the service life of the gas collecting pipe is effectively prolonged. The wavy shock absorption steel plates are arranged between the surface heat fire-resistant layer and the ceramic fiber felt, so that the internal stress and deformation of the pipe wall caused by temperature difference are effectively absorbed and released, and the thermal shock resistance of the pipeline are improved; the cushioning steel plate and the surface heat cavity at the periphery of the surface heat fire-resistant layer form a convection-free air cavity, so that an excellent heat insulation effect is generated; the honeycomb ceramic layer is filled between the cushioning steel plate and the ceramic fiber felt, and the honeycomb ceramic layer contains countless micropores, so that the geometric surface area of the carrier is greatly enhanced by the porous structure, and the thermal shock resistance are improved. Therefore, the structure not only greatly improves the heat insulation effect of the gas collecting pipe, but also improves the thermal shock resistance of the gas collecting pipe. And the tube shell supporting plate is supported below the tube shell, and the tube shell supporting rib plate is arranged on the outer side of the tube shell supporting plate, so that the overall rigidity of the gas collecting tube is improved, the sagging and bending of the gas collecting tube are avoided, and the reduced gas collecting tube support and support occupy a space field.
The preferred embodiment of the utility model, the face hot flame retardant coating is built by laying bricks or stones by the mullite firebrick. Has better fireproof and heat-insulating effects.
The utility model discloses a preferred embodiment, the wave steel sheet that the bradyseism steel sheet was made by heat-resisting steel, the honeycomb ceramic layer is filled by honeycomb ceramic and is formed. Has good thermal shock resistance.
The utility model discloses a preferred embodiment, tube support pallet and tube support rib all set up along tube length direction, are provided with three tube support rib boards in the outside of tube support pallet. The tube shell support supporting plate has a supporting wrap angle alpha = 90-120 degrees, and the tube shell support rib plates are located in the radius direction of the tube shell. Has good supporting rigidity.
Drawings
The thermal shock resistant high rigidity gas collecting tube of the waste heat recovery coke oven of the utility model is further explained with the attached drawings and the specific implementation mode.
FIG. 1 is a schematic view of the appearance and structure of a specific embodiment of the thermal shock resistant high rigidity gas collecting tube of the waste heat recovery coke oven of the present invention;
FIG. 2 is a schematic sectional view of the embodiment A-A shown in FIG. 1.
In the figure, 1-pipe shell, 2-ceramic fiber felt, 3-shock absorption steel plate, 4-honeycomb ceramic layer, 5-heat-resistant cavity, 6-surface heat fire-resistant layer, 7-pipe shell support supporting plate and 8-pipe shell support rib plate.
Detailed Description
The high-rigidity gas collecting pipe for resisting thermal shock of the waste heat recovery coke oven shown in figures 1 and 2 comprises a pipe shell 1 which is formed by rolling and welding steel plates into a round pipe shape, and a layer of ceramic fiber felt 2 with the thickness of about 5mm is paved in the pipe wall of the pipe shell 1. A tubular surface heat fire-resistant layer 6 is formed by building fire-resistant bricks in a pipe shell 1, the fire-resistant bricks are mullite heat-insulating bricks, the heat value R =0.6 square meter K/W, the cross sections of the fire-resistant bricks are trapezoidal, the surfaces of two sides of the trapezoid are building surfaces, connecting mortises and connecting tenons are respectively arranged on the two sides, the cross sections of the connecting mortises and the connecting tenons are semicircular, and two adjacent lining fire-resistant bricks are joggled and joggled with each other through the connecting mortises and the connecting tenons.
The shock absorption plate is characterized in that a shock absorption steel plate 3 in a wave plate shape is arranged between the surface heat fire-resistant layer 6 and the ceramic fiber felt 2 in a winding mode, the shock absorption steel plate 3 is made of common heat-resistant steel, a heat insulation cavity 5 is formed between the shock absorption steel plate 3 and the outer peripheral surface of the surface heat fire-resistant layer 6, a honeycomb ceramic layer 4 is filled between the shock absorption steel plate 3 and the ceramic fiber felt 2, and the honeycomb ceramic layer 4 is formed by filling honeycomb ceramic.
A circular-arc-plate-shaped cartridge support pallet 7 is supported below the cartridge, and the cartridge support pallet 7 has a support wrap angle α =100 °, which is preferably selected from 90 ° to 120 °. Three shell support rib plates 8 are welded on the outer side of the shell support supporting plate 7 along the radius direction of the shell, one shell support rib plate 8 is located in the vertical direction, the other two shell support rib plates are symmetrically arranged on two sides of the vertical shell support rib plate 8, and the shell support rib plates 8 are made of common carbon steel. The shell support brackets 7 and the shell support ribs 8 are arranged along the length of the shell.
The above description has been made of a preferred embodiment of the present invention, but the present invention is not limited thereto, and many modifications and variations are possible. All such modifications are intended to be included within the scope of this invention without departing from the basic underlying principles thereof.
Claims (5)
1. The utility model provides a high rigidity discharge of waste heat recovery coke oven thermal shock resistance, includes and builds by laying bricks or stones and enclose into pipy face hot flame retardant coating (6), is provided with tube (1) at the periphery side of face hot flame retardant coating (6), and the pipe wall upper berth of tube (1) is equipped with ceramic fiber felt (2), its characterized in that: a wavy shock absorption steel plate (3) is arranged between the surface heat fire-resistant layer (6) and the ceramic fiber felt (2), a heat insulation cavity (5) is formed on the outer peripheral surfaces of the shock absorption steel plate (3) and the surface heat fire-resistant layer (6), and a honeycomb ceramic layer (4) is filled between the shock absorption steel plate (3) and the ceramic fiber felt (2); a pipe shell supporting plate (7) is supported below the pipe shell (1), and pipe shell supporting rib plates (8) are arranged on the outer side of the pipe shell supporting plate (7).
2. The heat shock resistant high rigidity gas collecting pipe of the waste heat recovery coke oven of claim 1; the method is characterized in that: the surface heat fire-resistant layer (6) is formed by building mullite fire-resistant bricks.
3. The heat shock resistant high rigidity gas collecting pipe of the waste heat recovery coke oven of claim 1; the method is characterized in that: the shock absorption steel plate (3) is a wave-shaped steel plate made of heat-resistant steel, and the honeycomb ceramic layer (4) is filled with honeycomb ceramic.
4. The heat shock resistant high rigidity gas collecting pipe of the waste heat recovery coke oven of claim 1; the method is characterized in that: the pipe shell supporting support plate (7) and the pipe shell supporting rib plates (8) are arranged along the length direction of the pipe shell (1), and three pipe shell supporting rib plates (8) are arranged on the outer side of the pipe shell supporting support plate (7).
5. The high rigidity gas collecting pipe of the waste heat recovery coke oven with thermal shock resistance according to claim 1 or 4; the method is characterized in that: the tube shell supporting plate (7) has a supporting wrap angle alpha = 90-120 degrees, and the tube shell supporting rib plate (8) is located in the radius direction of the tube shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020521047.3U CN212199114U (en) | 2020-04-10 | 2020-04-10 | Thermal shock resistant high-rigidity gas collecting pipe of waste heat recovery coke oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020521047.3U CN212199114U (en) | 2020-04-10 | 2020-04-10 | Thermal shock resistant high-rigidity gas collecting pipe of waste heat recovery coke oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212199114U true CN212199114U (en) | 2020-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020521047.3U Active CN212199114U (en) | 2020-04-10 | 2020-04-10 | Thermal shock resistant high-rigidity gas collecting pipe of waste heat recovery coke oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212199114U (en) |
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2020
- 2020-04-10 CN CN202020521047.3U patent/CN212199114U/en active Active
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