CN110452714B - High-temperature taking device and method for coke oven crude gas - Google Patents
High-temperature taking device and method for coke oven crude gas Download PDFInfo
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- CN110452714B CN110452714B CN201910761320.1A CN201910761320A CN110452714B CN 110452714 B CN110452714 B CN 110452714B CN 201910761320 A CN201910761320 A CN 201910761320A CN 110452714 B CN110452714 B CN 110452714B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B27/00—Arrangements for withdrawal of the distillation gases
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B27/00—Arrangements for withdrawal of the distillation gases
- C10B27/06—Conduit details, e.g. valves
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B43/00—Preventing or removing incrustations
- C10B43/14—Preventing incrustations
Abstract
The invention discloses a high-temperature taking device and a high-temperature taking method for raw coke oven gas. The inlet of the bridge pipe is connected with the ascending pipe of the coke oven, the outlet of the bridge pipe is connected with the inlet of the liquid seal assembly, and the outlet of the liquid seal assembly is connected with the gas collecting pipe. The device changes the conveying mode of the original bridge pipe device, does not need to spray ammonia water for cooling, and can realize the direct extraction of the high-temperature raw coke oven gas at 600-800 ℃ on the premise of ensuring the operation safety of the coke oven. The invention can avoid the separation of carbon-containing organic matters such as coal tar and the like and the graphitization phenomenon in the conveying pipeline, and provides conditions for fully utilizing the sensible heat of the raw gas and high-temperature water vapor resources.
Description
Technical Field
The invention belongs to the field of energy and chemical engineering, and particularly relates to a device and a method for taking out raw coke oven gas at a high temperature.
Background
The coke oven gas which is a byproduct in the coking industry becomes a large-tonnage energy source and chemical resource. At present, the chemical utilization of coke oven gas is mostly concentrated on the production of methanol, synthetic ammonia, hydrogen, natural gas and the like, and the coke oven gas is clean coke oven gas obtained by recovering chemical products such as tar, benzene, ammonia and the like through a series of procedures of electric tar capturing, ammonia removal, naphthalene removal, benzene washing, desulfurization and the like after crude gas from a coke oven is initially cooled. The conventional methods for producing synthesis gas from clean coke oven gas to synthesize chemical products such as methanol, dimethyl ether and synthetic ammonia are mostly as follows: partial oxidation, steam reforming, and carbon dioxide reforming. Catalytic systems are required for all three of the above methods. The raw gas is purified to reduce the sulfide, halide, tar and the like in the purified gas to a very low level so as to prevent the catalyst from being poisoned. The conventional process flow for preparing the synthesis gas by using the coke oven gas is long, and the high-temperature sensible heat of the coke oven crude gas and the latent heat of steam in the coke oven crude gas are not effectively utilized, so that the energy is wasted. If the raw gas is not subjected to cooling and chemical product recovery treatment, but carbon-containing organic matters such as tar, benzene, naphthalene, methane and the like are directly subjected to steam non-catalytic conversion at high temperature to prepare the synthesis gas or are subjected to catalytic cracking to obtain low-carbon hydrocarbons such as methane and the like, the problems of long process flow, serious pollution, carbon deposition and poisoning of a catalyst in the catalytic conversion process and the like in the conventional preparation of the synthesis gas can be avoided, and meanwhile, high-temperature energy and water vapor resources are fully utilized. The synthesis gas generated by steam reforming is used for synthesizing methanol and ammonia together with hydrogen and carbon monoxide in the coke oven gas, if low-carbon hydrocarbons such as methane and the like are obtained, the methane can be further separated and used as fuel, and the residual gas is used for producing the methanol and the ammonia.
In order to fully utilize the high-temperature sensible heat of the coke oven raw gas and the latent heat of steam in the coke oven raw gas, the high-temperature raw gas coming out of the gas collecting pipe needs to be conveyed to a non-catalytic reforming furnace, simultaneously, the phenomena that carbon-containing organic matters such as coal tar and the like are separated out and graphitization occurs in a conveying pipeline are avoided, and the coke oven raw gas also needs to be taken out and conveyed in a high-temperature state. However, in the existing method for taking out the raw coke oven gas, high-temperature raw coke oven gas is cooled by high-low pressure ammonia water, the temperature is reduced to 80 ℃, and then the raw coke oven gas enters a subsequent working section for purification treatment, and the existing device for taking out the raw coke oven gas (comprising an ascending pipe, a bridge pipe and a gas collecting pipe, wherein an ammonia water injection device is arranged on the bridge pipe) cannot directly take out the raw coke oven gas with the temperature as high as 600-800 ℃.
Disclosure of Invention
The invention provides a device and a method for taking out raw coke oven gas at high temperature for solving the problems in the prior art, and the specific technical scheme is as follows:
the invention relates to a high-temperature raw coke oven gas taking device, which comprises an ascending pipe, a bridge pipe and a liquid seal assembly; the lower port of the ascending pipe is connected with a crude gas outlet of a coke oven carbonization chamber, and the side surface of the upper section of the ascending pipe is provided with an ascending pipe outlet and is connected with the horizontal port of the bridge pipe; the horizontal port and the vertical port of the bridge pipe are 90 degrees, the bent pipe part of the bridge pipe is arc-shaped or folded, and the vertical downward port of the bridge pipe is connected with the upper port of the insertion pipe of the liquid seal assembly through a flange; the liquid seal assembly comprises an inserting pipe, a liquid seal outer pipe, a heat insulation flange I and a gas outlet pipe of the liquid seal assembly; the gas outlet pipe of the liquid seal assembly is connected with a crude gas collecting pipe of the high-temperature coke oven;
the side surface of the lower section of the ascending pipe is provided with 1-4 combustion gas inlets, and the combustion gas inlets are provided with coke oven gas burners; the upper end of the ascending pipe is provided with an ascending pipe cover device,
the bridge pipe is provided with a cleaning hole and an observation hole, and the cleaning hole and the observation hole are positioned above the vertical part of the bridge pipe; the bridge pipe is connected with the ascending pipe in a plug-in connection mode or a flange connection mode;
the inserting pipe at the upper end of the liquid seal assembly is inserted into the liquid seal outer pipe at the position of the same central line and is connected with the liquid seal outer pipe through a first heat insulation flange; the gas outlet pipe of the liquid seal assembly is arranged on the side surface of the upper section of the liquid seal outer pipe; a sealing liquid inlet pipe and a sealing liquid high-level overflow pipe are further arranged on the side surface of the upper section of the liquid sealing outer pipe, a sealing liquid low-level overflow pipe is arranged on the side surface of the lower part of the liquid sealing outer pipe, and a drain pipe is arranged at the bottom of the liquid sealing outer pipe; the number of the high-level overflow pipes of the sealing liquid is 1-4, and the high-level overflow pipes are arranged at different heights on the side surface of the liquid sealing outer pipe so as to adjust the liquid level height in the liquid sealing assembly.
Preferably, the insert pipe comprises two parts, namely an upper heat-preservation insert pipe and a non-heat-preservation insert pipe, and the outer diameters of the two parts are equal; the heat-insulating insert pipe is connected with the non-heat-insulating insert pipe through a second heat-insulating flange, and a heat-insulating gasket is arranged between the upper flange and the lower flange and is connected with the non-heat-insulating insert pipe through a heat-insulating bolt.
Preferably, the total height of the ascending pipe is 1.5-4.0 m, and the inner diameter of the ascending pipe is 0.2-1.0 m; and a water seal groove is arranged on the ascending pipe cover device, and the water seal liquid level is 40-100 mm.
Preferably, the inner diameter of the bridge pipe is 0.2-1.0 m, and the radius of a central arc line of the circular bend pipe is 0.4-2.0 m.
Preferably, the inner diameter of the insertion tube is 0.2-1.0 m, the ratio of the outer diameter of the insertion tube to the inner diameter of the liquid seal outer tube is 0.2-0.7: 1.0, and the vertical distance between the bottom end of the insertion tube and the bottom surface of the liquid seal outer tube is 0.5-1.5 m; the inner diameter of the gas outlet pipe of the liquid seal assembly is 0.2-1.0 m; the vertical distance between the lower edge of the gas outlet pipe of the liquid seal assembly and the upper edge of the uppermost sealing liquid high-level overflow pipe is 0.1-1.0 m; the vertical distance between the lower edge of the sealing liquid low-position overflow pipe and the bottom of the liquid sealing outer pipe straight cylinder is 0.03-0.2 m; the vertical distance between the lower edge of the sealing liquid inlet pipe and the upper edge of the uppermost sealing liquid high-level overflow pipe is 0.2-1.0 m.
Preferably, the vertical installation position of the second heat insulation flange is 0.10-1.0 m higher than the upper edge of the uppermost sealing liquid high-level overflow pipe.
Preferably, the heat-insulating insertion pipe adopts a lining structure, the shell of the heat-insulating insertion pipe adopts a heat-resistant alloy metal material, and the lining structure comprises a fire-resistant interlayer and a heat-insulating layer; the non-heat-insulation insert pipe, the liquid seal outer pipe, the sealing liquid inlet pipe, the sealing liquid high-position overflow pipe, the low-position overflow pipe and the drain pipe are made of high-temperature-resistant and corrosion-resistant alloy metal materials; the fireproof interlayer is a high-temperature-resistant, wear-resistant, corrosion-resistant, thermal shock-resistant and slagging-resistant fireproof material which is built or poured, the fireproof temperature is higher than 1200 ℃, and the thickness is 40-150 mm; the heat-resistant temperature of the heat-insulating layer is higher than 1100 ℃, and the thickness of the heat-insulating layer is 40-150 mm.
Preferably, the ascending pipe, the bridge pipe, the heat-insulating insertion pipe and the gas outlet pipe of the liquid seal assembly all adopt lining structures; wherein, the shells of the ascending pipe, the bridge pipe and the gas outlet pipe of the liquid seal assembly are made of cast iron, carbon steel or heat-resistant steel; the lining structure comprises a fire-resistant interlayer and an insulating layer.
A coke oven crude gas high-temperature taking method of a coke oven crude gas high-temperature taking device comprises the following process steps:
a. charging stage
a1. Adding water into the rising pipe cover device to enable the rising pipe cover device to be in a water sealing state;
a2. opening a valve of a high-level overflow pipe of the sealing liquid, opening a valve of a sealing liquid inlet pipe, adding the sealing liquid into the liquid sealing assembly, and ensuring the continuous outflow of the sealing liquid of the high-level overflow pipe of the sealing liquid to ensure that the sealing liquid level in the liquid sealing assembly is in a high-level liquid sealing state;
a3. opening a smoke extraction and dust removal pipeline valve of a coke oven carbonization chamber, and pumping smoke dust in a coal charging stage into a dust removal device for dust removal and then emptying;
b. carbonization stage
b1. Continuously adding water into a water seal in the rising pipe cover device, wherein the water in the liquid seal groove is in an overflow state, and the water seal is kept effective; opening a valve on the sealing liquid low-level overflow pipe, discharging the sealing liquid in the sealing liquid low-level overflow pipe to enable the sealing liquid in the liquid sealing assembly to be in a low-level state, and then closing the valve on the sealing liquid low-level overflow pipe;
b2. respectively conveying coke oven gas and air to a coke oven gas burner, igniting the coke oven gas burner, and heating a pipeline in a coke oven crude gas high-temperature taking device to 400-700 ℃;
b3. closing a smoke extraction and dust removal pipeline valve of the carbonization chamber, and allowing the coke oven crude gas from the coke oven carbonization chamber to enter a bridge pipe through a rising pipe, then sequentially pass through a heat insulation insertion pipe and a non-heat insulation insertion pipe, and then enter a high-temperature coke oven crude gas collecting pipe through a liquid seal gas outlet pipe;
c. coke discharging stage
c1. Closing a valve for conveying coke oven gas and air to the coke oven gas burner, and extinguishing the coke oven gas burner;
c2. opening a valve of a high-level overflow pipe of the sealing liquid, opening a valve of a sealing liquid inlet pipe, adding the sealing liquid into the liquid sealing assembly, and ensuring the continuous outflow of the sealing liquid of the high-level overflow pipe of the sealing liquid to ensure that the sealing liquid level in the liquid sealing assembly is in a high-level liquid sealing state;
c3. opening the ascending pipe cover device, cleaning attachments on the inner wall of the ascending pipe according to actual conditions, and placing a cover plate on the ascending pipe cover device after cleaning is finished;
c4. checking whether attachments exist on the inner wall of the bridge pipe through the observation hole, if necessary, cleaning the bridge pipe through the cleaning hole, and closing the cleaning hole after cleaning is finished; the cleaned attachments fall into the bottom of the liquid seal assembly and are discharged through a drain pipe;
c5. the coke discharging operation of the carbonization chamber of the coke oven is started.
Preferably, the sealing liquid in the liquid seal assembly is water or high-temperature molten salt.
Compared with the prior art, the invention has the following advantages:
1. the coke oven crude gas with the temperature as high as 600-800 ℃ can be taken out under the condition of not reducing the temperature.
2. The graphitized attachments on the ascending tube are greatly reduced, and the long-term stable operation can be realized.
3. The operation part and the sealing liquid sealing part are connected by adopting a heat insulation flange at high temperature, so that the heat loss can be reduced, and the loss of sealing liquid can be reduced.
Drawings
FIG. 1 is an overall schematic view of a high-temperature raw coke oven gas extraction device of a coke oven.
The parts in the figure illustrate:
1. a riser pipe; 2. a bridge pipe; 3. a liquid seal assembly; 4. a riser gas outlet pipe; 5. a combustion gas inlet pipe; 6. a coke oven gas burner; 7. a riser cap apparatus; 8. cleaning the hole; 9. an observation hole; 10. an insertion tube; 11. liquid sealing the outer tube; 12. a first heat insulation flange; 13. a liquid seal assembly gas outlet pipe; 14. sealing the liquid inlet pipe; 15. a high-level overflow pipe of sealing liquid; 16. a sealing liquid low-level overflow pipe; 17. a discharge port; 18. a heat-insulating insert pipe; 19. a non-insulated insert tube; 20. a second heat insulation flange; 24. a gas collecting pipe for raw gas of a high-temperature coke oven.
Fig. 2 is an enlarged view of the insertion tube 10.
The parts in the figure illustrate:
18. a heat-insulating insert pipe; 19. a non-insulated insert tube; 20. a second heat insulation flange; 21. a heat-insulating gasket; 22. a refractory barrier; 23. and (7) an insulating layer.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
The invention relates to a high-temperature raw coke oven gas taking device, which comprises an ascending pipe 1, a bridge pipe 2 and a liquid seal assembly 3; the lower port of the ascending pipe 1 is connected with a crude gas outlet of a coke oven carbonization chamber, and the side surface of the upper section of the ascending pipe 1 is provided with an ascending pipe outlet 4 and is connected with the horizontal port of the bridge pipe 2; the horizontal port and the vertical port of the bridge pipe 2 are 90 degrees, the bent pipe part of the bridge pipe 2 is in an arc shape or a broken line shape, and the vertical downward port of the bridge pipe is connected with the upper port of the insertion pipe 10 of the liquid seal assembly 3 through a flange; the liquid seal assembly 3 comprises an inserting pipe 10, a liquid seal outer pipe 11, a first heat insulation flange 12 and a gas outlet pipe 13 of the liquid seal assembly; the gas outlet pipe 13 of the liquid seal assembly is connected with a raw gas collecting pipe 24 of the high-temperature coke oven;
the side surface of the lower section of the ascending pipe 1 is provided with 1-4 combustion gas inlets 5, and the combustion gas inlets 5 are provided with a coke oven gas burner 6; the upper end of the ascending pipe 1 is provided with an ascending pipe cover device 7,
the bridge pipe 2 is provided with a cleaning hole 8 and an observation hole 9, and the cleaning hole 8 and the observation hole 9 are positioned above the vertical part of the bridge pipe 2; the bridge pipe 2 is connected with the ascending pipe 1 in a plug-in connection mode or a flange connection mode;
the inserting pipe 10 at the upper end of the liquid seal assembly 3 is inserted into the liquid seal outer pipe 11 at the position of the same central line and is connected with the liquid seal outer pipe 11 through a heat insulation flange I12; the gas outlet pipe 13 of the liquid seal assembly is arranged on the side surface of the upper section of the liquid seal outer pipe 11; a sealing liquid inlet pipe 14 and a sealing liquid high-level overflow pipe 15 are further arranged on the side surface of the upper section of the liquid sealing outer pipe 11, a sealing liquid low-level overflow pipe 16 is arranged on the side surface of the lower part of the liquid sealing outer pipe 11, and a drain pipe 17 is arranged at the bottom of the liquid sealing outer pipe 11; the number of the sealing liquid high-level overflow pipes 15 is 1-4, and the sealing liquid high-level overflow pipes are arranged at different heights on the side surface of the liquid sealing outer pipe 11 so as to adjust the liquid level height in the liquid sealing assembly 3.
Preferably, the insertion tube 10 comprises an upper insulating insertion tube 18 and a non-insulating insertion tube 19, which have the same outer diameter; the heat-insulating insert pipe 18 is connected with the non-heat-insulating insert pipe 19 through a second heat-insulating flange 20, a heat-insulating gasket 21 is arranged between the upper flange and the lower flange, and the heat-insulating insert pipe and the non-heat-insulating insert pipe are connected through heat-insulating bolts.
Preferably, the total height of the ascending pipe 1 is 1.5-4.0 m, and the inner diameter is 0.2-1.0 m; and a water seal groove is arranged on the ascending pipe cover device 7, and the water seal liquid level is 40-100 mm.
Preferably, the inner diameter of the bridge pipe 2 is 0.2-1.0 m, and the radius of a central arc line of a circular bend part is 0.4-2.0 m.
Preferably, the inner diameter of the insertion tube 10 is 0.2-1.0 m, the ratio of the outer diameter of the insertion tube to the inner diameter of the liquid seal outer tube 11 is 0.2-0.7: 1.0, and the vertical distance between the bottom end of the insertion tube and the bottom surface of the liquid seal outer tube 11 is 0.5-1.5 m; the inner diameter of the gas outlet pipe 13 of the liquid seal assembly is 0.2-1.0 m; the vertical distance between the lower edge of the gas outlet pipe 13 of the liquid seal assembly and the upper edge of the uppermost sealing liquid high-level overflow pipe 15 is 0.1-1.0 m; the vertical distance between the lower edge of the sealing liquid low-position overflow pipe 16 and the bottom of the straight cylinder of the liquid sealing outer pipe 11 is 0.03-0.2 m; the vertical distance between the lower edge of the sealing liquid inlet pipe 14 and the upper edge of the uppermost sealing liquid high-level overflow pipe 15 is 0.2-1.0 m.
Preferably, the vertical installation position of the second heat insulation flange 20 is 0.10-1.0 m higher than the upper edge of the uppermost sealing liquid high-level overflow pipe 15.
Preferably, the heat-insulating insertion pipe 18 adopts an inner lining structure, the outer shell of the heat-insulating insertion pipe is made of heat-resistant alloy metal materials, and the inner lining structure comprises a fire-resistant interlayer 22 and a heat-insulating layer 23; the non-heat-insulation inserting pipe 19, the liquid seal outer pipe 11, the sealing liquid inlet pipe 14, the sealing liquid high-position overflow pipe 15, the low-position overflow pipe 16 and the drain pipe 17 are made of high-temperature-resistant and corrosion-resistant alloy metal materials; the fireproof interlayer 22 is a high-temperature-resistant, wear-resistant, corrosion-resistant, thermal shock-resistant and slagging-resistant fireproof material which is built or poured, the fireproof temperature is higher than 1200 ℃, and the thickness is 40-150 mm; the heat-resistant temperature of the heat-insulating layer 23 is higher than 1100 ℃, and the thickness of the heat-insulating layer is 40-150 mm.
Preferably, the ascending pipe 1, the bridge pipe 2, the heat-insulating insertion pipe 18 and the gas outlet pipe 13 of the liquid seal assembly all adopt lining structures; wherein, the shells of the ascending pipe 1, the bridge pipe 2 and the gas outlet pipe 13 of the liquid seal assembly are made of cast iron, carbon steel or heat-resistant steel; the lining structure comprises a fire barrier 22 and an insulation layer 23.
A coke oven crude gas high-temperature taking method of a coke oven crude gas high-temperature taking device comprises the following process steps:
a. charging stage
a1. Adding water into the rising pipe cover device 7 to enable the rising pipe cover device to be in a water sealing state;
a2. opening a valve of a sealing liquid high-level overflow pipe 15, opening a valve of a sealing liquid inlet pipe 14, adding sealing liquid into the liquid seal assembly 3, ensuring the continuous outflow of the sealing liquid high-level overflow pipe 15, and enabling the sealing liquid level in the liquid seal assembly 3 to be in a high-level liquid seal state;
a3. opening a smoke extraction and dust removal pipeline valve of a coke oven carbonization chamber, and pumping smoke dust in a coal charging stage into a dust removal device for dust removal and then emptying;
b. carbonization stage
b1. Continuously adding water into the water seal in the rising pipe cover device 7, and keeping the water in the liquid seal tank in an overflow state to keep the water seal effective; opening a valve on the sealing liquid low-level overflow pipe 16, discharging the sealing liquid in the sealing liquid low-level overflow pipe, enabling the sealing liquid in the liquid sealing assembly 3 to be in a low-level state, and then closing the valve on the sealing liquid low-level overflow pipe 16;
b2. respectively conveying coke oven gas and air to a coke oven gas burner 6, igniting the coke oven gas burner 6, and heating a pipeline in a coke oven crude gas high-temperature taking device to 400-700 ℃;
b3. closing a smoke exhaust and dust removal pipeline valve of the carbonization chamber, and allowing the coke oven crude gas from the coke oven carbonization chamber to enter a bridge pipe 2 through an ascending pipe 1, then sequentially pass through a heat insulation insertion pipe 18 and a non-heat insulation insertion pipe 19, and then enter a high-temperature coke oven crude gas collecting pipe 24 through a liquid seal gas outlet pipe 13;
c. coke discharging stage
c1. Closing a valve for conveying coke oven gas and air to the coke oven gas burner 6, and extinguishing the coke oven gas burner 6;
c2. opening a valve of a sealing liquid high-level overflow pipe 15, opening a valve of a sealing liquid inlet pipe 14, adding sealing liquid into the liquid seal assembly 3, ensuring the continuous outflow of the sealing liquid high-level overflow pipe 15, and enabling the sealing liquid level in the liquid seal assembly 3 to be in a high-level liquid seal state;
c3. opening the ascending pipe cover device 7, cleaning attachments on the inner wall of the ascending pipe according to actual conditions, and placing a cover plate on the ascending pipe cover device 7 after cleaning is finished;
c4. whether attachments exist on the inner wall of the bridge pipe 2 is checked through the observation hole 9, if necessary, cleaning can be carried out from the cleaning hole 8, and after cleaning is finished, the cleaning hole 8 is closed; the cleaned attachments fall into the bottom of the liquid seal assembly 3 and are discharged through a drain pipe 17;
c5. the coke discharging operation of the carbonization chamber of the coke oven is started.
Preferably, the sealing liquid in the liquid seal assembly 3 is water or high-temperature molten salt.
Example 1
The inner diameter of the ascending pipe 1 is 0.3m, the total height is 2.5m, the side surface of the lower section is provided with 2 combustion gas inlet pipes 5 and a coke oven gas burner 6, and the water level in a water seal tank on an ascending pipe cover device 7 is 50 mm. The horizontal port of the bridge pipe 2 is connected with an outlet pipe 4 on the side surface of the upper section of the ascending pipe 1 by adopting a flange connection mode. The inner diameter of the bridge pipe 2 is 0.3m, and the radius of the central arc line of the circular bend pipe part is 1.0 m. The inner diameter of the insertion tube 10 is 0.3m, the ratio of the outer diameter to the inner diameter of the liquid seal outer tube 11 is 0.5:1.0, and the distance between the bottom end of the insertion tube and the bottom surface of the liquid seal outer tube 11 is 0.6 m. The number of the sealing liquid high-level overflow pipes 15 is 2, and the sealing liquid high-level overflow pipes are respectively arranged on the side surfaces of the liquid seal outer pipes 11 at different heights so as to adjust the liquid level height in the liquid seal assembly 3. The gas outlet pipe 13 of the liquid seal assembly has an inner diameter of 0.3m and the distance between the lower edge of the gas outlet pipe and the upper edge of the uppermost liquid seal high level overflow pipe 15 is 0.3 m. The distance between the lower edge of the sealing liquid low-position overflow pipe 16 and the bottom of the straight cylinder of the liquid sealing outer pipe 11 is 0.05 m; the distance between the lower edge of the sealing liquid inlet pipe 14 and the upper edge of the uppermost sealing liquid high-level overflow pipe 15 is 0.3 m. The installation position of the second heat insulation flange 20 is 0.20m higher than the upper edge of the uppermost sealing liquid high-level overflow pipe 15. The refractory interlayer 22 is made of high-temperature resistant, wear-resistant, corrosion-resistant, thermal shock-resistant and slagging-resistant refractory materials by masonry or pouring, the refractory temperature is higher than 1200 ℃, and the thickness is 100 mm. The heat-resisting temperature of the heat-insulating layer 23 is higher than 1100 ℃, and the thickness is 100 mm.
The operation method of the coke oven crude gas high-temperature extraction device comprises the following steps:
a coal charging stage
a. Adding water into the rising pipe cover device 7 to enable the rising pipe cover device to be in a water sealing state;
b. opening a valve of a sealing liquid high-level overflow pipe 15, opening a valve of a sealing liquid inlet pipe 14, adding sealing liquid into the liquid seal assembly 3, and ensuring the continuous outflow of the sealing liquid high-level overflow pipe 15 so as to enable the sealing liquid level in the liquid seal assembly 3 to be in a high-level liquid seal state;
c. opening a smoke extraction and dust removal pipeline valve of the carbonization chamber, and pumping the smoke dust in the coal charging stage into a dust removal device for dust removal and then emptying;
two carbonization stages
a. Water is continuously added into the water seal in the ascending pipe cover device 7, and the water in the liquid seal tank is in an overflow state, so that the water seal is kept effective; opening a valve on the sealing liquid low-level overflow pipe 16, discharging the sealing liquid in the sealing liquid low-level overflow pipe, enabling the sealing liquid in the liquid sealing assembly 3 to be in a low-level state, and then closing the valve on the sealing liquid low-level overflow pipe 16;
b. respectively conveying coke oven gas and air to the coke oven gas burner 6, igniting the coke oven gas burner 6, and heating a pipeline in the coke oven crude gas high-temperature taking device to 600 ℃;
c. and closing a smoke exhaust and dust removal pipeline valve of the carbonization chamber, and allowing the coke oven crude gas from the coke oven carbonization chamber to enter the bridge pipe 2 through the ascending pipe 1, then sequentially pass through the heat insulation insertion pipe 18 and the non-heat insulation insertion pipe 19, and then enter the high-temperature coke oven crude gas collecting pipe 24 through the liquid seal gas outlet pipe 13.
Three coke discharging stages
a. Closing a valve for conveying coke oven gas and air to the coke oven gas burner 6, and extinguishing the coke oven gas burner 6;
b. opening a valve of a sealing liquid high-level overflow pipe 15, opening a valve of a sealing liquid inlet pipe 14, adding sealing liquid into the liquid seal assembly 3, ensuring the continuous outflow of the sealing liquid high-level overflow pipe 15, and enabling the sealing liquid level in the liquid seal assembly 3 to be in a high-level liquid seal state;
c. opening the ascending pipe cover device 7, cleaning attachments on the inner wall of the ascending pipe according to actual conditions, and placing a cover plate on the ascending pipe cover device 7 after cleaning is finished;
d. whether attachments exist on the inner wall of the bridge pipe 2 is checked through the observation hole 9, if necessary, cleaning can be carried out from the cleaning hole 8, and after cleaning is finished, the cleaning hole 8 is closed; the cleaned attachments fall into the bottom of the liquid seal assembly 3 and are discharged through a drain pipe 17;
e. the coke discharging operation of the carbonization chamber of the coke oven is started.
Example 2
The inner diameter of the ascending pipe 1 is 0.4m, the total height is 3.0m, the side surface of the lower section is provided with 4 combustion gas inlets 5 and a coke oven gas burner 6, and the water level in a water seal tank on an ascending pipe cover device 7 is 100 mm. The horizontal port of the bridge pipe 2 is connected with the outlet pipe 4 on the side surface of the upper section of the ascending pipe 1 in a plug-in connection mode. The inner diameter of the bridge pipe 2 is 0.4m, and the radius of the central arc line of the circular bend pipe part is 1.5 m. The inner diameter of the insertion tube 10 is 0.4m, the ratio of the outer diameter of the insertion tube to the inner diameter of the liquid sealing outer tube 11 is 0.6, and the distance between the bottom end of the insertion tube and the straight bottom of the liquid sealing outer tube 11 is 0.8 m. The number of the sealing liquid high-level overflow pipes 15 is 4, and the sealing liquid high-level overflow pipes are respectively arranged on the side surfaces of the liquid seal outer pipes 11 at different heights so as to adjust the liquid level height in the liquid seal assembly 3. The gas outlet pipe 13 of the liquid seal assembly has an internal diameter of 0.4m and the distance between the lower edge of the gas outlet pipe and the upper edge of the uppermost liquid seal overflow pipe 15 is 0.5 m. The distance between the lower edge of the sealing liquid low-position overflow pipe 16 and the bottom surface of the liquid seal outer pipe 11 is 0.1 m; the distance between the lower edge of the sealing liquid inlet pipe 14 and the upper edge of the uppermost sealing liquid high-level overflow pipe 15 is 0.4 m. The installation position of the second heat insulation flange 20 is 0.4m higher than the upper edge of the uppermost sealing liquid high-level overflow pipe 15. The refractory interlayer 22 is made of high-temperature resistant, wear-resistant, corrosion-resistant, thermal shock-resistant and slagging-resistant refractory materials by masonry or pouring, the refractory temperature is higher than 1200 ℃, and the thickness is 80 mm. The heat-resisting temperature of the heat-insulating layer 23 is higher than 1100 ℃, and the thickness is 100 mm.
The operation method of the coke oven crude gas high-temperature extraction device comprises the following steps:
a coal charging stage
a. Adding water into the rising pipe cover device 7 to enable the rising pipe cover device to be in a water sealing state;
b. opening a valve of a sealing liquid high-level overflow pipe 15, opening a valve of a sealing liquid inlet pipe 14, adding sealing liquid into the liquid seal assembly 3, ensuring the continuous outflow of the sealing liquid high-level overflow pipe 15, and enabling the sealing liquid level in the liquid seal assembly 3 to be in a high-level liquid seal state;
c. opening a smoke extraction and dust removal pipeline valve of the carbonization chamber, and pumping the smoke dust in the coal charging stage into a dust removal device for dust removal and then emptying;
two carbonization stages
a. Water is continuously added into the water seal in the ascending pipe cover device 7, and the water in the liquid seal tank is in an overflow state, so that the water seal is kept effective; opening a valve on the sealing liquid low-level overflow pipe 16, discharging the sealing liquid in the sealing liquid low-level overflow pipe, enabling the sealing liquid in the liquid sealing assembly 3 to be in a low-level state, and then closing the valve on the sealing liquid low-level overflow pipe 16;
b. respectively conveying coke oven gas and air to the coke oven gas burner 6, igniting the coke oven gas burner 6, and heating a pipeline in the coke oven crude gas high-temperature taking device to 700 ℃;
c. and closing a smoke exhaust and dust removal pipeline valve of the carbonization chamber, and allowing the coke oven crude gas from the coke oven carbonization chamber to enter the bridge pipe 2 through the ascending pipe 1, then sequentially pass through the heat insulation insertion pipe 18 and the non-heat insulation insertion pipe 19, and then enter the high-temperature coke oven crude gas collecting pipe 24 through the liquid seal gas outlet pipe 13.
Three coke discharging stages
a. Closing a valve for conveying coke oven gas and air to the coke oven gas burner 6, and extinguishing the coke oven gas burner 6;
b. opening a valve of a sealing liquid high-level overflow pipe 15, opening a valve of a sealing liquid inlet pipe 14, adding sealing liquid into the liquid seal assembly 3, ensuring the continuous outflow of the sealing liquid high-level overflow pipe 15, and enabling the sealing liquid level in the liquid seal assembly 3 to be in a high-level liquid seal state;
c. opening the ascending pipe cover device 7, cleaning attachments on the inner wall of the ascending pipe according to actual conditions, and placing a cover plate on the ascending pipe cover device 7 after cleaning is finished;
d. whether attachments exist on the inner wall of the bridge pipe 2 is checked through the observation hole 9, if necessary, cleaning can be carried out from the cleaning hole 8, and after cleaning is finished, the cleaning hole 8 is closed; the cleaned attachments fall into the bottom of the liquid seal assembly 3 and are discharged through a drain pipe 17;
e. the coke discharging operation of the carbonization chamber of the coke oven is started.
Example 3
The inner diameter of the ascending pipe 1 is 0.5m, the total height is 2.5m, the side surface of the lower section is provided with 4 combustion gas inlets 5 and a coke oven gas burner 6, and the water level in a water seal tank on an ascending pipe cover device 7 is 80 mm. The horizontal port of the bridge pipe 2 is connected with the outlet pipe 4 on the side surface of the upper section of the ascending pipe 1 in a plug-in connection mode. The inner diameter of the bridge pipe 2 is 0.5m, and the radius of the central arc line of the circular bend pipe part is 1.6 m. The inner diameter of the insertion tube 10 is 0.5m, the ratio of the outer diameter of the insertion tube to the inner diameter of the liquid seal outer tube 11 is 0.5:1.0, and the distance between the bottom end of the insertion tube and the bottom of the straight tube of the liquid seal outer tube 11 is 0.5 m. The number of the sealing liquid high-level overflow pipes 15 is 3, and the sealing liquid high-level overflow pipes are respectively arranged on the side surfaces of the liquid seal outer pipes 11 at different heights so as to adjust the liquid level height in the liquid seal assembly 3. The gas outlet pipe 13 of the liquid seal assembly has an internal diameter of 0.5m and the distance between the lower edge and the upper edge of the uppermost liquid seal high level overflow pipe 15 is 0.4 m. The distance between the lower edge of the sealing liquid low-position overflow pipe 16 and the bottom surface of the liquid seal outer pipe 11 is 0.08 m; the distance between the lower edge of the sealing liquid inlet pipe 14 and the upper edge of the uppermost sealing liquid high-level overflow pipe 15 is 0.4 m. The installation position of the second heat insulation flange 20 is 0.6m higher than the upper edge of the uppermost sealing liquid high-level overflow pipe 15. The refractory interlayer 22 is made of high-temperature resistant, wear-resistant, corrosion-resistant, thermal shock-resistant and slagging-resistant refractory materials by masonry or pouring, the refractory temperature is higher than 1200 ℃, and the thickness is 150 mm. The heat-resisting temperature of the heat-insulating layer 23 is higher than 1100 ℃, and the thickness is 100 mm.
The operation method of the coke oven crude gas high-temperature extraction device comprises the following steps:
a coal charging stage
a. Adding water into the rising pipe cover device 7 to enable the rising pipe cover device to be in a water sealing state;
b. opening a valve of a sealing liquid high-level overflow pipe 15, opening a valve of a sealing liquid inlet pipe 14, adding sealing liquid into the liquid seal assembly 3, ensuring the continuous outflow of the sealing liquid high-level overflow pipe 15, and enabling the sealing liquid level in the liquid seal assembly 3 to be in a high-level liquid seal state;
c. opening a smoke extraction and dust removal pipeline valve of the carbonization chamber, and pumping the smoke dust in the coal charging stage into a dust removal device for dust removal and then emptying;
two carbonization stages
a. Water is continuously added into the water seal in the ascending pipe cover device 7, and the water in the liquid seal tank is in an overflow state, so that the water seal is kept effective; opening a valve on the sealing liquid low-level overflow pipe 16, discharging the sealing liquid in the sealing liquid low-level overflow pipe, enabling the sealing liquid in the liquid sealing assembly 3 to be in a low-level state, and then closing the valve on the sealing liquid low-level overflow pipe 16;
b. respectively conveying coke oven gas and air to the coke oven gas burner 6, igniting the coke oven gas burner 6, and heating a pipeline in the coke oven crude gas high-temperature taking device to 550 ℃;
c. and closing a smoke exhaust and dust removal pipeline valve of the carbonization chamber, and allowing the coke oven crude gas from the coke oven carbonization chamber to enter the bridge pipe 2 through the ascending pipe 1, then sequentially pass through the heat insulation insertion pipe 18 and the non-heat insulation insertion pipe 19, and then enter the high-temperature coke oven crude gas collecting pipe 24 through the liquid seal gas outlet pipe 13.
Three coke discharging stages
a. Closing a valve for conveying coke oven gas and air to the coke oven gas burner 6, and extinguishing the coke oven gas burner 6;
b. opening a valve of a sealing liquid high-level overflow pipe 15, opening a valve of a sealing liquid inlet pipe 14, adding sealing liquid into the liquid seal assembly 3, ensuring the continuous outflow of the sealing liquid high-level overflow pipe 15, and enabling the sealing liquid level in the liquid seal assembly 3 to be in a high-level liquid seal state;
c. opening the ascending pipe cover device 7, cleaning attachments on the inner wall of the ascending pipe according to actual conditions, and placing a cover plate on the ascending pipe cover device 7 after cleaning is finished;
d. whether attachments exist on the inner wall of the bridge pipe 2 is checked through the observation hole 9, if necessary, cleaning can be carried out from the cleaning hole 8, and after cleaning is finished, the cleaning hole 8 is closed; the cleaned attachments fall into the bottom of the liquid seal assembly 3 and are discharged through a drain pipe 17;
e. the coke discharging operation of the carbonization chamber of the coke oven is started.
Example 4
The inner diameter of the ascending pipe 1 is 0.6m, the total height is 3.0m, the side surface of the lower section is provided with 3 combustion gas inlets 5 and a coke oven gas burner 6, and the water level in a water seal tank on the ascending pipe cover device 7 is 70 mm. The horizontal port of the bridge pipe 2 is connected with the outlet pipe 4 on the side surface of the upper section of the ascending pipe 1 in a plug-in connection mode. The inner diameter of the bridge pipe 2 is 0.6m, and the radius of the central arc line of the circular bend pipe part is 2.0 m. The inner diameter of the insertion tube 10 is 0.6m, the ratio of the outer diameter of the insertion tube to the inner diameter of the liquid seal outer tube 11 is 0.2-0.7: 1.0, and the distance between the bottom end of the insertion tube and the straight bottom of the liquid seal outer tube 11 is 0.5 m. The number of the sealing liquid high-level overflow pipes 15 is 4, and the sealing liquid high-level overflow pipes are respectively arranged on the side surfaces of the liquid seal outer pipes 11 at different heights so as to adjust the liquid level height in the liquid seal assembly 3. The gas outlet pipe 13 of the liquid seal assembly has an internal diameter of 0.6m and the distance between the lower edge of the gas outlet pipe and the upper edge of the uppermost liquid seal overflow pipe 15 is 0.4 m. The distance between the lower edge of the sealing liquid low-position overflow pipe 16 and the bottom surface of the liquid sealing outer pipe 11 is 0.12 m; the distance between the lower edge of the sealing liquid inlet pipe 14 and the upper edge of the uppermost sealing liquid high-level overflow pipe 15 is 0.6 m. The installation position of the second heat insulation flange 20 is 0.3m higher than the upper edge of the uppermost sealing liquid high-level overflow pipe 15. The refractory interlayer 22 is made of high-temperature resistant, wear-resistant, corrosion-resistant, thermal shock-resistant and slagging-resistant refractory materials by masonry or pouring, the refractory temperature is higher than 1200 ℃, and the thickness is 140 mm. The heat-resistant temperature of the heat-insulating layer 23 is higher than 1100 ℃, and the thickness is 150 mm.
The operation method of the coke oven crude gas high-temperature extraction device comprises the following steps:
a coal charging stage
a. Adding water into the rising pipe cover device 7 to enable the rising pipe cover device to be in a water sealing state;
b. opening a valve of a sealing liquid high-level overflow pipe 15, opening a valve of a sealing liquid inlet pipe 14, adding sealing liquid into the liquid seal assembly 3, ensuring the continuous outflow of the sealing liquid high-level overflow pipe 15, and enabling the sealing liquid level in the liquid seal assembly 3 to be in a high-level liquid seal state;
c. opening a smoke extraction and dust removal pipeline valve of the carbonization chamber, and pumping the smoke dust in the coal charging stage into a dust removal device for dust removal and then emptying;
two carbonization stages
a. Water is continuously added into the water seal in the ascending pipe cover device 7, and the water in the liquid seal tank is in an overflow state, so that the water seal is kept effective; opening a valve on the sealing liquid low-level overflow pipe 16, discharging the sealing liquid in the sealing liquid low-level overflow pipe, enabling the sealing liquid in the liquid sealing assembly 3 to be in a low-level state, and then closing the valve on the sealing liquid low-level overflow pipe 16;
b. respectively conveying coke oven gas and air to the coke oven gas burner 6, igniting the coke oven gas burner 6, and heating a pipeline in the coke oven crude gas high-temperature taking device to 650 ℃;
c. and closing a smoke exhaust and dust removal pipeline valve of the carbonization chamber, and allowing the coke oven crude gas from the coke oven carbonization chamber to enter the bridge pipe 2 through the ascending pipe 1, then sequentially pass through the heat insulation insertion pipe 18 and the non-heat insulation insertion pipe 19, and then enter the high-temperature coke oven crude gas collecting pipe 24 through the liquid seal gas outlet pipe 13.
Three coke discharging stages
a. Closing a valve for conveying coke oven gas and air to the coke oven gas burner 6, and extinguishing the coke oven gas burner 6;
b. opening a valve of a sealing liquid high-level overflow pipe 15, opening a valve of a sealing liquid inlet pipe 14, adding sealing liquid into the liquid seal assembly 3, ensuring the continuous outflow of the sealing liquid high-level overflow pipe 15, and enabling the sealing liquid level in the liquid seal assembly 3 to be in a high-level liquid seal state;
c. opening the ascending pipe cover device 7, cleaning attachments on the inner wall of the ascending pipe according to actual conditions, and placing a cover plate on the ascending pipe cover device 7 after cleaning is finished;
d. whether attachments exist on the inner wall of the bridge pipe 2 is checked through the observation hole 9, if necessary, cleaning can be carried out from the cleaning hole 8, and after cleaning is finished, the cleaning hole 8 is closed; the cleaned attachments fall into the bottom of the liquid seal assembly 3 and are discharged through a drain pipe 17;
e. the coke discharging operation of the carbonization chamber of the coke oven is started.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (10)
1. The device for taking out the raw coke oven gas at high temperature is characterized by comprising an ascending pipe (1), a bridge pipe (2) and a liquid seal assembly (3); the lower port of the ascending pipe (1) is connected with a crude gas outlet of a coke oven carbonization chamber, and the side surface of the upper section of the ascending pipe (1) is provided with an ascending pipe outlet (4) and is connected with the horizontal port of the bridge pipe (2); the horizontal port and the vertical port of the bridge pipe (2) are 90 degrees, the bent pipe part of the bridge pipe (2) is arc-shaped or folded, and the vertical downward port of the bridge pipe is connected with the upper port of the insertion pipe (10) of the liquid seal assembly (3) through a flange; the liquid seal assembly (3) comprises an inserting pipe (10), a liquid seal outer pipe (11), a heat insulation flange I (12) and a gas outlet pipe (13) of the liquid seal assembly; the gas outlet pipe (13) of the liquid seal assembly is connected with a crude gas collecting pipe (24) of the high-temperature coke oven;
the side surface of the lower section of the ascending pipe (1) is provided with 1-4 combustion gas inlets (5), and the combustion gas inlets (5) are provided with coke oven gas burners (6); the upper end of the ascending pipe (1) is provided with an ascending pipe cover device (7),
the bridge pipe (2) is provided with a cleaning hole (8) and an observation hole (9), and the cleaning hole (8) and the observation hole (9) are positioned above the vertical part of the bridge pipe (2); the bridge pipe (2) is connected with the ascending pipe (1) in a plug-in connection mode or a flange connection mode;
the inserting pipe (10) at the upper end of the liquid seal assembly (3) is inserted into the liquid seal outer pipe (11) at the position of the same central line and is connected with the liquid seal outer pipe (11) through a heat insulation flange I (12); the gas outlet pipe (13) of the liquid seal assembly is arranged on the side surface of the upper section of the liquid seal outer pipe (11); a sealing liquid inlet pipe (14) and a sealing liquid high-level overflow pipe (15) are further arranged on the side surface of the upper section of the liquid sealing outer pipe (11), a sealing liquid low-level overflow pipe (16) is arranged on the side surface of the lower part of the liquid sealing outer pipe (11), and a drain pipe (17) is arranged at the bottom of the liquid sealing outer pipe (11); the number of the sealing liquid high-level overflow pipes (15) is 1-4, and the sealing liquid high-level overflow pipes are arranged at different heights on the side surface of the liquid sealing outer pipe (11) so as to adjust the liquid level height in the liquid sealing assembly (3); the high-temperature coke oven crude gas is coke oven crude gas at the temperature of 600 ℃ and 800 ℃.
2. The coke oven crude gas high-temperature extraction device as claimed in claim 1, wherein the insert pipe (10) comprises an upper insulating insert pipe (18) and a non-insulating insert pipe (19), the outer diameters of which are equal; the heat-insulating insert pipe (18) is connected with the non-heat-insulating insert pipe (19) through a second heat-insulating flange (20), and a heat-insulating gasket (21) is arranged between the upper flange and the lower flange and is connected by adopting a heat-insulating bolt.
3. The coke oven crude gas high-temperature extraction device as claimed in claim 1, wherein the riser (1) has a total height of 1.5-4.0 m and an inner diameter of 0.2-1.0 m; and a water seal groove is arranged on the ascending pipe cover device (7), and the water seal liquid level is 40-100 mm.
4. The coke oven crude gas high-temperature extraction device as claimed in claim 1, wherein the inner diameter of the bridge pipe (2) is 0.2-1.0 m, and the radius of the central arc of the circular bend part is 0.4-2.0 m.
5. The coke oven raw gas high-temperature extraction device as claimed in claim 1, wherein the inner diameter of the insertion tube (10) is 0.2-1.0 m, the ratio of the outer diameter of the insertion tube to the inner diameter of the liquid seal outer tube (11) is 0.2-0.7: 1.0, and the vertical distance between the bottom end of the insertion tube and the bottom surface of the liquid seal outer tube (11) is 0.5-1.5 m; the inner diameter of the gas outlet pipe (13) of the liquid seal assembly is 0.2-1.0 m; the vertical distance between the lower edge of the gas outlet pipe (13) of the liquid seal assembly and the upper edge of the uppermost sealing liquid high-level overflow pipe (15) is 0.1-1.0 m; the vertical distance between the lower edge of the sealing liquid low-position overflow pipe (16) and the bottom of the straight cylinder of the liquid sealing outer pipe (11) is 0.03-0.2 m; the vertical distance between the lower edge of the sealing liquid inlet pipe (14) and the upper edge of the uppermost sealing liquid high-level overflow pipe (15) is 0.2-1.0 m.
6. The coke oven crude gas high-temperature extraction device as claimed in claim 2, wherein the vertical installation position of the second heat insulation flange (20) is 0.10-1.0 m higher than the upper edge of the uppermost sealing liquid high-level overflow pipe (15).
7. The coke oven raw gas high-temperature extraction device as claimed in claim 2, wherein the insulation insert tube (18) is of a lining structure, the outer shell of the insulation insert tube is made of heat-resistant alloy metal material, and the lining structure comprises a fireproof interlayer (22) and an insulation layer (23); the non-heat-insulation inserting pipe (19), the liquid seal outer pipe (11), the sealing liquid inlet pipe (14), the sealing liquid high-position overflow pipe (15), the low-position overflow pipe (16) and the emptying pipe (17) are made of high-temperature-resistant and corrosion-resistant alloy metal materials; the fireproof interlayer (22) is a high-temperature-resistant, wear-resistant, corrosion-resistant, thermal shock-resistant and slagging-resistant fireproof material which is built or poured, the fireproof temperature is higher than 1200 ℃, and the thickness is 40-150 mm; the heat-resistant temperature of the heat-insulating layer (23) is higher than 1100 ℃, and the thickness of the heat-insulating layer is 40-150 mm.
8. The coke oven crude gas high-temperature extraction device as claimed in claim 2, wherein the ascending pipe (1), the bridge pipe (2), the heat insulation insertion pipe (18) and the gas outlet pipe (13) of the liquid seal assembly all adopt lining structures; wherein, the shells of the ascending pipe (1), the bridge pipe (2) and the gas outlet pipe (13) of the liquid seal assembly are made of cast iron, carbon steel or heat-resistant steel; the lining structure comprises a fire-resistant interlayer (22) and an insulating layer (23).
9. The method for extracting the coke oven crude gas at high temperature by using the coke oven crude gas high temperature extraction device of claim 2 is characterized by comprising the following process steps:
a. charging stage
a1. Adding water into the rising pipe cover device (7) to enable the rising pipe cover device to be in a water sealing state;
a2. opening a valve of a sealing liquid high-level overflow pipe (15), opening a valve of a sealing liquid inlet pipe (14), adding sealing liquid into the liquid seal assembly (3), ensuring the continuous outflow of the sealing liquid high-level overflow pipe (15), and enabling the sealing liquid level in the liquid seal assembly (3) to be in a high-level liquid seal state;
a3. opening a smoke extraction and dust removal pipeline valve of a coke oven carbonization chamber, and pumping smoke dust in a coal charging stage into a dust removal device for dust removal and then emptying;
b. carbonization stage
b1. Continuously adding water into a water seal in the rising pipe cover device (7), wherein the water in the liquid seal groove is in an overflow state, and the water seal is kept effective; opening a valve on the sealing liquid low-level overflow pipe (16), discharging the sealing liquid in the sealing liquid low-level overflow pipe to enable the sealing liquid in the liquid sealing assembly (3) to be in a low-level state, and then closing the valve on the sealing liquid low-level overflow pipe (16);
b2. respectively conveying coke oven gas and air to a coke oven gas burner (6), igniting the coke oven gas burner (6), and heating a pipeline in a coke oven crude gas high-temperature taking device to 400-700 ℃;
b3. closing a smoke extraction and dust removal pipeline valve of the carbonization chamber, and allowing the coke oven crude gas from the coke oven carbonization chamber to enter a bridge pipe (2) through an ascending pipe (1), then sequentially pass through a heat insulation insertion pipe (18) and a non-heat insulation insertion pipe (19), and then enter a high-temperature coke oven crude gas collecting pipe (24) through a liquid seal gas outlet pipe (13);
c. coke discharging stage
c1. Closing a valve for conveying coke oven gas and air to the coke oven gas burner (6), and extinguishing the coke oven gas burner (6);
c2. opening a valve of a sealing liquid high-level overflow pipe (15), opening a valve of a sealing liquid inlet pipe (14), adding sealing liquid into the liquid seal assembly (3), ensuring the continuous outflow of the sealing liquid high-level overflow pipe (15), and enabling the sealing liquid level in the liquid seal assembly (3) to be in a high-level liquid seal state;
c3. opening the ascending pipe cover device (7), cleaning attachments on the inner wall of the ascending pipe according to actual conditions, and placing a cover plate on the ascending pipe cover device (7) after cleaning is finished;
c4. whether attachments exist on the inner wall of the bridge pipe (2) is checked through the observation hole (9), if necessary, cleaning can be carried out through the cleaning hole (8), and after cleaning is finished, the cleaning hole (8) is closed; the cleaned attachments fall into the bottom of the liquid seal assembly (3) and are discharged through a discharge pipe (17);
c5. the coke discharging operation of the carbonization chamber of the coke oven is started.
10. The method for extracting the coke oven crude gas at the high temperature as claimed in claim 9, wherein the sealing liquid in the liquid seal assembly (3) is water or high-temperature molten salt.
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3712859C1 (en) * | 1987-04-15 | 1988-07-28 | Didier Eng | Sealing-off device between the ascending-pipe bend and the collecting main in a coking oven or similar gas producer |
| JPH03210386A (en) * | 1990-01-12 | 1991-09-13 | Nkk Corp | Bent riser of coke oven |
| CN202953980U (en) * | 2012-08-06 | 2013-05-29 | 山西鑫立能源科技有限公司 | Wild coal gas condensing device of coal pyrolysis furnace |
| CN104073268A (en) * | 2014-07-11 | 2014-10-01 | 上海理工大学 | Coking-preventing raw coke oven gas waste heat recycling device for heat-conduction oil coke oven |
| CN204509190U (en) * | 2015-01-20 | 2015-07-29 | 邢同春 | Equipment derived by a kind of new Type Coke Oven raw gas |
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