CN110778842A - Method and device for conveying coke oven crude gas at high temperature - Google Patents
Method and device for conveying coke oven crude gas at high temperature Download PDFInfo
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- CN110778842A CN110778842A CN201910213163.0A CN201910213163A CN110778842A CN 110778842 A CN110778842 A CN 110778842A CN 201910213163 A CN201910213163 A CN 201910213163A CN 110778842 A CN110778842 A CN 110778842A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/30—Heating of pipes or pipe systems
- F16L53/32—Heating of pipes or pipe systems using hot fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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Abstract
The application provides a method and a device for conveying coke oven crude gas at high temperature, wherein the device comprises the following steps: have fire-resistant bottom interlayer upper portion is provided with presss from both sides the jacket layer, it includes by inside to outside in proper order to press from both sides the jacket layer: an inner cavity, a fireproof inner interlayer, a jacket cavity, a fireproof outer interlayer, a metal shell and a heat insulation layer; the combustor is used for enabling the inner cavity to meet a preset high-temperature condition; the coke oven raw gas inlet pipe is used for conveying the coke oven raw gas reaching the preset input temperature condition in the coke oven carbonization chamber into the inner cavity; the coke oven crude gas outlet pipe is used for conveying high-temperature coke oven crude gas to the non-catalytic reforming furnace. The method and the device for conveying the coke oven raw gas at the high temperature provided by the application realize conveying the coke oven raw gas at the high temperature for the first time, avoid the phenomena of separation of carbon-containing organic matters such as coal tar and the like and graphitization in a conveying pipeline, and fully reserve the sensible heat and high-temperature water vapor resources of the coke oven raw gas.
Description
Technical Field
The application relates to the field of energy chemical industry, in particular to a method for conveying coke oven crude gas at high temperature and a device for conveying coke oven crude gas at 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.
The coke oven gas is clean coke oven gas obtained by performing a series of procedures of electric tar catching, ammonia removal, naphthalene removal, benzene washing, desulfurization and the like on coke oven raw gas from a coke oven after primary cooling, and recovering chemical products such as tar, benzene, ammonia and the like.
The synthesis of chemical products such as methanol, dimethyl ether, synthetic ammonia and the like by using clean coke oven gas as a raw material comprises three methods: partial oxidation, steam reforming, and carbon dioxide reforming. Catalytic systems are required for all three of the above methods. Coke oven raw gas needs to be purified to reduce the sulfide, halide, tar and the like in the purified gas to a very low level so as to prevent catalyst poisoning.
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 gas and the latent heat of steam in the coke oven gas are not effectively utilized, so that the energy is wasted.
The coke oven crude gas is directly used for preparing the synthesis gas by a steam non-catalytic conversion method without cooling and recycling production treatment, and the high temperature and water vapor resources of the coke oven crude gas can be fully utilized. Directly converts all carbon-containing organic matters in coal tar, benzene, naphthalene and the like in the coal gas to produce useful components such as synthesis gas and the like. The problems of long process flow, serious pollution and carbon deposition and poisoning of the catalyst in the catalytic conversion process in the conventional synthesis gas preparation are avoided. In addition, after the raw coke oven gas is converted by using the water vapor as a raw material, redundant carbon in chemical products such as coal tar, benzene, naphthalene, olefin and the like can make up for insufficient carbon in clean gas, so that the hydrogen-carbon ratio is increased, and the yield of methanol is increased.
In order to fully utilize high-temperature sensible heat and latent heat of steam therein, the coke oven raw gas from the gas collecting pipe needs to be conveyed to a non-catalytic reforming furnace, and in order to ensure that the heat of the coke oven raw gas is not lost (the temperature is not reduced) in the conveying process, and simultaneously avoid the separation of carbon-containing organic matters such as coal tar and the like and the graphitization phenomenon in a conveying pipeline, the coke oven raw gas must be conveyed at a high temperature state to further provide proper process conditions for the subsequent non-catalytic conversion process.
Disclosure of Invention
The application provides a method for conveying coke oven crude gas at high temperature, in particular to a device for conveying coke oven crude gas at high temperature; the problems of separation of carbon-containing organic matters such as coal tar and the like and graphitization in the conveying pipeline caused by conveying the coke oven crude gas at a high temperature are solved.
In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:
the application provides a device of coke oven crude gas is carried to high temperature has fire-resistant bottom interlayer 13 upper portion is provided with the jacket layer, the jacket layer includes by inside to outside in proper order: an inner cavity 1, a fireproof inner interlayer 2, a jacket cavity 3, a fireproof outer interlayer 4, a metal shell 5 and a heat insulation layer 6;
a combustor 8 and a flue gas outlet 11 which are respectively communicated with the jacket cavity 3 through the jacket layer by the heat insulation layer 6; the burner 8 comprises; a gas inlet pipe 9 and an air inlet pipe 10; the heat pipe is used for supplying heat to the jacket cavity 3 by utilizing heat generated by combustion of fuel gas input by the fuel gas inlet pipe (9) and air input by the air inlet pipe (10) so as to enable the inner cavity 1 to meet a preset high-temperature condition;
the coke oven crude gas inlet pipe 7 and the coke oven crude gas outlet pipe 12 are respectively communicated with the inner cavity 1 through the jacket layer by the heat insulation layer 6; the coke oven raw gas inlet pipe 7 is used for conveying the coke oven raw gas reaching the preset input temperature condition in the coke oven carbonization chamber into the inner cavity 1; the coke oven crude gas outlet pipe 12 is used for conveying high-temperature coke oven crude gas to the non-catalytic reforming furnace.
Preferably, the fireproof inner partition layer 2, the fireproof outer partition layer 4 and the fireproof bottom partition layer 13 are respectively built or poured by fireproof materials; refractory materials with high temperature resistance, wear resistance, heat resistance, shock resistance and slagging resistance; the refractory material has the characteristics of high temperature resistance, wear resistance, heat resistance, shock resistance and slagging resistance, and the refractoriness is more than 1100 ℃;
the thickness of the fireproof inner partition layer 2 is 40-90 mm;
the thickness of the fire-resistant outer interlayer 4 is 100-200 mm;
the thickness of the fireproof bottom interlayer 13 is 150-250 mm.
Preferably, the heat-insulating layer 6 is a heat-insulating material, and the service temperature of the heat-insulating material is more than 1200 ℃.
Preferably, the metal shell 5 is carbon steel.
Preferably, the two sides of the device are respectively provided with a plurality of burners 8, and the burners 8 are staggered at intervals of 4-6 meters.
Preferably, the device comprises a plurality of coke oven raw gas inlet pipes 7;
the coke oven raw gas inlet pipe 7 is arranged above the burner 8, and the interval between the coke oven raw gas inlet pipe and the burner is equal to the interval between two adjacent coke oven carbonization chambers.
The application provides a method for conveying coke oven crude gas at high temperature, which is applied to the device and comprises the following steps:
s1, replacing air in the inner cavity 1 and the jacket cavity 3 with nitrogen to enable the oxygen content to meet the preset oxygen content condition;
s2, supplying heat to the jacket cavity 3 in the burner by using heat generated by combustion of fuel gas input by the fuel gas inlet pipe 9 and air input by the air inlet pipe 10 so as to enable the inner cavity 1 to reach and maintain a preset high-temperature condition;
s3, judging whether the temperature in the inner cavity 1 meets a preset high-temperature condition or not;
and S4, if yes, conveying the coke oven crude gas reaching the preset input temperature condition in the coke oven carbonization chamber into the inner cavity 1.
Preferably, the preset high-temperature condition specifically includes: the temperature in the inner cavity 1 is more than 600 ℃.
Preferably, the preset input temperature condition specifically includes: the temperature of the coke oven crude gas reaches the temperature range of 600-800 ℃.
Preferably, the preset oxygen content condition specifically includes: the oxygen content is less than 0.5%.
Based on the disclosure of the above embodiments, it can be known that the embodiments of the present application have the following beneficial effects:
the application provides a method and a device for conveying coke oven crude gas at high temperature, wherein the device comprises the following steps:
have fire-resistant bottom interlayer 13 upper portion is provided with the jacket layer, the jacket layer includes by inside to outside in proper order: an inner cavity 1, a fireproof inner interlayer 2, a jacket cavity 3, a fireproof outer interlayer 4, a metal shell 5 and a heat insulation layer 6;
a combustor 8 and a flue gas outlet 11 which are respectively communicated with the jacket cavity 3 through the jacket layer by the heat insulation layer 6; the burner 8 comprises; a gas inlet pipe 9 and an air inlet pipe 10; the heat pipe is used for supplying heat to the jacket cavity 3 by utilizing heat generated by combustion of fuel gas input by the fuel gas inlet pipe 9 and air input by the air inlet pipe 10 so as to enable the inner cavity 1 to meet a preset high-temperature condition;
the coke oven crude gas inlet pipe 7 and the coke oven crude gas outlet pipe 12 are respectively communicated with the inner cavity 1 through the jacket layer by the heat insulation layer 6; the coke oven raw gas inlet pipe 7 is used for conveying the coke oven raw gas reaching the preset input temperature condition in the coke oven carbonization chamber into the inner cavity 1; the coke oven crude gas outlet pipe 12 is used for conveying high-temperature coke oven crude gas to the non-catalytic reforming furnace.
According to the method and the device for conveying the coke oven raw gas at the high temperature, the coke oven raw gas is conveyed at the high temperature for the first time, the phenomena of separation of carbon-containing organic matters such as coal tar and the like and graphitization in a conveying pipeline are avoided, and the sensible heat and high-temperature water vapor resources of the coke oven raw gas are fully reserved.
The problems of long process flow, serious pollution, carbon deposition and poisoning of the catalyst in the catalytic conversion process and the like in the prior art of preparing the synthesis gas by reforming the coke oven clean gas are solved. The coke oven raw gas provided by the application makes full use of sensible heat of the coke oven raw gas and latent heat of steam in the coke oven raw gas, avoids the problems, solves the problem that phenol-cyanogen-containing wastewater is difficult to treat in the existing coking process, and opens up a new way for the utilization of the coke oven raw gas.
The method has the characteristics of simple equipment, low investment, low pollution, no generation of liquid waste, guarantee of high-temperature conveying and the like.
Drawings
FIG. 1 is a schematic side view of a device for conveying coke oven crude gas at high temperature according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a top view of the device for conveying coke oven crude gas at high temperature provided by the embodiment of the application;
FIG. 3 is a flowchart of a method for conveying coke oven crude gas at high temperature according to an embodiment of the present application.
Description of the reference numerals
1-inner cavity, 2-fireproof inner partition layer, 3-jacket cavity, 4-fireproof outer partition layer, 5-metal shell, 6-insulating layer, 7-coke oven crude gas inlet pipe, 8-burner, 9-gas inlet pipe, 10-air inlet pipe, 11-flue gas outlet, 12-coke oven crude gas outlet pipe, and 13-fireproof bottom partition layer.
Detailed Description
Specific embodiments of the present application will be described in detail below with reference to the accompanying drawings, but the present application is not limited thereto.
It will be understood that various modifications may be made to the embodiments disclosed herein. Accordingly, the foregoing description should not be construed as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with a general description of the application given above and the detailed description of the embodiments given below, serve to explain the principles of the application.
These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.
It should also be understood that, although the present application has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of application, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely examples of the application, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the application of unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.
The application provides a device for conveying coke oven crude gas at high temperature; the application also provides a method for conveying the coke oven crude gas at high temperature. Details are described in the following examples one by one.
The first embodiment provided by the application is an embodiment of a device for conveying coke oven crude gas at high temperature.
The embodiment is described in detail with reference to fig. 1 and fig. 2, wherein fig. 1 is a schematic side view of a device for conveying coke oven crude gas at high temperature according to an embodiment of the present application; FIG. 2 is a schematic structural diagram of a top view of the device for conveying coke oven crude gas at high temperature provided by the embodiment of the application.
The embodiment provides a device for conveying coke oven crude gas at high temperature, which is provided with a fireproof bottom interlayer 13, wherein the upper part of the fireproof bottom interlayer 13 is provided with a jacket layer, and the jacket layer sequentially comprises from inside to outside: an inner cavity 1, a fireproof inner interlayer 2, a jacket cavity 3, a fireproof outer interlayer 4, a metal shell 5 and a heat preservation layer 6.
A combustor 8 and a flue gas outlet 11 which are respectively communicated with the jacket cavity 3 through the jacket layer by the heat insulation layer 6; the burner 8 comprises; a gas inlet pipe 9 and an air inlet pipe 10; the heat pipe is used for supplying heat to the jacket cavity 3 by utilizing the heat generated by combustion of the fuel gas input by the fuel gas inlet pipe 9 and the air input by the air inlet pipe 10, so that the inner cavity 1 meets the preset high-temperature condition.
The coke oven crude gas inlet pipe 7 and the coke oven crude gas outlet pipe 12 are respectively communicated with the inner cavity 1 through the jacket layer by the heat insulation layer 6; the coke oven raw gas inlet pipe 7 is used for conveying the coke oven raw gas reaching the preset input temperature condition in the coke oven carbonization chamber into the inner cavity 1; the coke oven crude gas outlet pipe 12 is used for conveying high-temperature coke oven crude gas to the non-catalytic reforming furnace.
The fireproof inner partition layer 2, the fireproof outer partition layer 4 and the fireproof bottom partition layer 13 are respectively formed by building or pouring fireproof materials; refractory materials with high temperature resistance, wear resistance, heat resistance, shock resistance and slagging resistance; the refractory material has the characteristics of high temperature resistance, wear resistance, heat resistance, shock resistance and slagging resistance, and the refractoriness is more than 1100 ℃;
the thickness of the fireproof inner partition layer 2 is 40-90 mm.
The thickness of the fire-resistant outer interlayer 4 is 100-200 mm.
The thickness of the fireproof bottom interlayer 13 is 150-250 mm.
The heat-insulating layer 6 is made of heat-insulating materials, and the using temperature of the heat-insulating layer is higher than 1200 ℃.
The metal shell 5 is carbon steel.
The combustor 8 is arranged on two sides of the device respectively, and the combustors 8 are arranged at intervals of 4-6 meters in a staggered mode.
The device comprises a plurality of coke oven raw gas inlet pipes 7.
The coke oven raw gas inlet pipe 7 is arranged above the burner 8, and the interval between the coke oven raw gas inlet pipe and the burner is equal to the interval between two adjacent coke oven carbonization chambers.
The device for conveying the coke oven crude gas at the high temperature provided by the application realizes conveying the coke oven crude gas at the high temperature state for the first time, avoids the phenomena of separation of carbon-containing organic matters such as coal tar and the like and graphitization in a conveying pipeline, and fully reserves the sensible heat and high-temperature water vapor resources of the coke oven crude gas.
The problems of long process flow, serious pollution, carbon deposition and poisoning of the catalyst in the catalytic conversion process and the like in the prior art of preparing the synthesis gas by reforming the coke oven clean gas are solved. The coke oven raw gas provided by the application makes full use of sensible heat of the coke oven raw gas and latent heat of steam in the coke oven raw gas, avoids the problems, solves the problem that phenol-cyanogen-containing wastewater is difficult to treat in the existing coking process, and opens up a new way for the utilization of the coke oven raw gas.
The method has the characteristics of simple equipment, low investment, low pollution, no generation of liquid waste, guarantee of high-temperature conveying and the like.
Corresponding to the first embodiment provided by the application, the application also provides a second embodiment, namely a method for conveying coke oven crude gas at high temperature. Since the second embodiment is basically similar to the first embodiment, the description is simple, and the relevant portions should be referred to the corresponding description of the first embodiment. The method embodiments described below are merely illustrative.
FIG. 3 shows an embodiment of a method for conveying coke oven crude gas at high temperature provided by the application. FIG. 3 is a flowchart of a method for conveying coke oven crude gas at high temperature according to an embodiment of the present application.
Referring to fig. 3, the present application provides a method for conveying coke oven crude gas at high temperature, which is applied to the device of the first embodiment, and comprises the following steps:
and step S1, replacing air in the inner cavity 1 and the jacket cavity 3 with nitrogen to ensure that the oxygen content meets the preset oxygen content condition.
Step S2, supplying heat to the jacket cavity 3 in the burner by using the heat generated by the combustion of the fuel gas input by the fuel gas inlet pipe 9 and the air input by the air inlet pipe 10, so as to make the inner cavity 1 reach and maintain a preset high temperature condition.
Step S3, determining whether the temperature in the inner cavity 1 satisfies a preset high temperature condition.
And step S4, if yes, conveying the coke oven crude gas reaching the preset input temperature condition in the coke oven carbonization chamber into the inner cavity 1.
The preset high-temperature condition specifically comprises the following steps: the temperature in the inner cavity 1 is more than 600 ℃.
The preset input temperature condition specifically comprises the following steps: the temperature of the coke oven crude gas reaches the temperature range of 600-800 ℃.
The preset oxygen content condition specifically comprises the following steps: the oxygen content is less than 0.5%.
The embodiment provides a specific application scenario one:
when the device is started each time, nitrogen is needed to replace the air in the inner cavity 1 and the jacket cavity 3 of the coke oven crude gas, so that the oxygen content in the air is less than 0.5 percent; and valves on the gas inlet pipe 9 and the air inlet pipe 10 are respectively opened, mixed gas in the combustor 8 is ignited, the device is preheated, and coke oven crude gas starts to be conveyed when the temperature of the inner cavity 1 reaches above 600 ℃.
Raw coke oven gas of 800 ℃ from a coke oven carbonization chamber, the dry gas flow rate is 60000Nm
3And h, directly entering the inner cavity 1 through the coke oven raw gas inlet pipe 7. The rectangular height of the lower part of the inner cavity 1 is 3 meters, and the diameter of the semicircle of the upper part is 2.6 meters. The jacket cavity 3 has a width of 0.6 m. The thickness of the fire-resistant inner interlayer 2 is 90 mm, the thickness of the fire-resistant outer interlayer 4 is 200 mm, and the thickness of the fire-resistant bottom interlayer 13 is 250 mm; the fireproof inner interlayer 2, the fireproof outer interlayer 4 and the fireproof bottom interlayer 13 are masonry fireproof silica bricks. The heat-insulating layer 6 is a high-alumina light heat-insulating brick. The combustor 8 is arranged on two sides of the device respectively, and the combustors 8 are arranged at intervals of 4 meters in a staggered mode. The net gas flow of the coke oven carbonization chamber is 45Nm
3H, enters the burner 8 through the gas inlet duct 9 and has an air flow of 148Nm
3And h, entering the burner 8 through the air inlet pipe 10, and performing combustion heat supply in the jacket cavity 3. The coke oven crude gas with the temperature of 800 ℃ is heated and insulated in the jacket cavity 3 and then enters the non-catalytic reforming furnace through the coke oven crude gas outlet pipe 12.
The embodiment provides a specific application scenario two:
when the device is started each time, nitrogen is needed to replace the air in the inner cavity 1 and the jacket cavity 3, so that the oxygen content in the air is less than 0.5%; and valves on the gas inlet pipe 9 and the air inlet pipe 10 are respectively opened, mixed gas in the combustor 8 is ignited, the device is preheated, and coke oven crude gas starts to be conveyed when the temperature of the inner cavity 1 reaches above 600 ℃.
Raw coke oven gas with the temperature of 600 ℃ from a coke oven carbonization chamber and the dry gas flow of 60000Nm
3And h, directly entering the inner cavity 1 through the coke oven raw gas inlet pipe 7. The rectangular height of the lower part of the inner cavity 1 is 2.7 meters, and the diameter of the semicircle of the upper part is 2 meters. The jacket cavity 3 has a width of 1.1 m. The thickness of the fire-resistant inner interlayer 2 is 40 mm, the thickness of the fire-resistant outer interlayer 4 is 100 mm, and the thickness of the fire-resistant bottom interlayer 13 is 150 mm; the fireproof inner interlayer 2, the fireproof outer interlayer 4 and the fireproof bottom interlayer 13 are made of masonry fireproof material clay bricks. The heat-insulating layer 6 is a floating bead brick. The combustor 8 is arranged on two sides of the device respectively, and the combustors 8 are arranged at intervals of 6 meters in a staggered mode. The flow rate of the coke oven clean gas is 35Nm
3H, entering the burner 8 through the gas inlet duct 9, with an air flow of 115Nm
3And h, entering the burner 8 through the air inlet pipe 10, and performing combustion heat supply in the jacket cavity 3. The coke oven crude gas with the temperature of 600 ℃ is heated and preserved in the jacket cavity 3 and then enters the non-catalytic reforming furnace through the coke oven crude gas outlet pipe 12.
The specific application scenario provided by this embodiment is three:
when the device is started each time, nitrogen is needed to replace the air in the inner cavity 1 and the jacket cavity 3, so that the oxygen content in the air is less than 0.5%; and valves on the gas inlet pipe 9 and the air inlet pipe 10 are respectively opened, mixed gas in the combustor 8 is ignited, the device is preheated, and coke oven crude gas starts to be conveyed when the temperature of the inner cavity 1 reaches above 600 ℃.
The flow rate of dry gas of 800 ℃ coke oven crude gas from a coke oven is 60000Nm3/h, and the dry gas directly enters the inner cavity 1 through the coke oven crude gas inlet pipe 7. The rectangular height of the lower part of the inner cavity 1 is 2.5 meters, and the diameter of the semicircle of the upper part is 2.2 meters. The jacket cavity 3 has a width of 1 meter. The thickness of the fire-resistant inner interlayer 2 is 70 mm, and the thickness of the fire-resistant outer interlayer 4 is 150 mm, soThe thickness of the refractory bottom interlayer 13 is 200 mm; the fireproof inner interlayer 2, the fireproof outer interlayer 4 and the fireproof bottom interlayer 13 are high-alumina bricks made of masonry fireproof materials. The heat-insulating layer 6 is made of light silica bricks. The combustor 8 is arranged on two sides of the device respectively, and the combustors 8 are arranged in a staggered mode at intervals of 5 meters. The flow rate of the coke oven net gas is 48Nm
3And/h, the air flow rate is 158Nm3/h, the air enters the combustor 8 through the gas inlet pipe 9, and combustion heat supply is carried out in the jacket cavity 3 through the air inlet pipe 10. The coke oven crude gas with the temperature of 800 ℃ is heated and insulated in the jacket cavity 3 and then enters the non-catalytic reforming furnace through the coke oven crude gas outlet pipe 12.
The specific application scenario provided by this embodiment is four:
when the device is started each time, nitrogen is needed to replace the air in the inner cavity 1 and the jacket cavity 3, so that the oxygen content in the air is less than 0.5%; and valves on the gas inlet pipe 9 and the air inlet pipe 10 are respectively opened, mixed gas in the combustor 8 is ignited, the device is preheated, and coke oven crude gas starts to be conveyed when the temperature of the inner cavity 1 reaches above 600 ℃.
The flow rate of the dry gas from the coke oven of 700 ℃ coke oven raw gas is 60000Nm
3And h, directly entering the inner cavity 1 through the coke oven raw gas inlet pipe 7. The rectangular height of the lower part of the inner cavity 1 is 3.0 meters, and the diameter of the semicircle of the upper part is 2.5 meters. The jacket cavity 3 has a width of 0.9 m. The thickness of the fire-resistant inner interlayer 2 is 60 mm, the thickness of the fire-resistant outer interlayer 4 is 170 mm, and the thickness of the fire-resistant bottom interlayer 13 is 220 mm; the fireproof inner interlayer 2, the fireproof outer interlayer 4 and the fireproof bottom interlayer 13 are made of silicon fire clay for pouring high-temperature-resistant, wear-resistant, thermal-shock-resistant and slagging-resistant fireproof materials. The heat-insulating layer 6 is made of light clay bricks. The combustor 8 is arranged on two sides of the device respectively, and the combustors 8 are arranged in a staggered mode at intervals of 4.5 meters. The flow rate of the coke oven clean gas is 41Nm
3H, entering the burner 8 through the gas inlet duct 9, with an air flow of 135Nm
3H, entering the burner 8 through the air inlet pipe 10, taking place in the jacket cavity 3And combustion for heat supply. The coke oven crude gas with the temperature of 700 ℃ is heated and preserved in the jacket cavity 3, and then enters the non-catalytic reforming furnace through the coke oven crude gas outlet pipe 12.
The specific application scenario provided by this embodiment is five:
when the device is started each time, nitrogen is needed to replace the air in the inner cavity 1 and the jacket cavity 3, so that the oxygen content in the air is less than 0.5%; and valves on the gas inlet pipe 9 and the air inlet pipe 10 are respectively opened, mixed gas in the combustor 8 is ignited, the device is preheated, and coke oven crude gas starts to be conveyed when the temperature of the inner cavity 1 reaches above 600 ℃.
The flow rate of the dry gas from the coke oven of 700 ℃ coke oven raw gas is 60000Nm
3And h, directly entering the inner cavity 1 through the coke oven raw gas inlet pipe 7. The rectangular height of the lower part of the inner cavity 1 is 2.8 meters, and the diameter of the semicircle of the upper part is 2.1 meters. The jacket cavity 3 has a width of 1.3 m. The thickness of the fire-resistant inner interlayer 2 is 50 mm, the thickness of the fire-resistant outer interlayer 4 is 120 mm, and the thickness of the fire-resistant bottom interlayer 13 is 180 mm; the fireproof inner interlayer 2, the fireproof outer interlayer 4 and the fireproof bottom interlayer 13 are made of clay fire clay for pouring high-temperature-resistant, wear-resistant, thermal-shock-resistant and slagging-resistant fireproof materials. The heat-insulating layer 6 is made of polycrystalline alumina fiber. The combustor 8 is arranged on two sides of the device respectively, and the combustors 8 are arranged in a staggered mode at intervals of 5.2 meters. The flow rate of the coke oven clean gas is 45Nm
3H, enters the burner 8 through the gas inlet duct 9 and has an air flow of 148Nm
3And h, entering the burner 8 through the air inlet pipe 10, and performing combustion heat supply in the jacket cavity 3. The coke oven crude gas with the temperature of 700 ℃ is heated and preserved in the jacket cavity 3, and then enters the non-catalytic reforming furnace through the coke oven crude gas outlet pipe 12.
According to the method for conveying the coke oven raw gas at the high temperature, the coke oven raw gas is conveyed at the high temperature for the first time, the phenomena of separation of carbon-containing organic matters such as coal tar and the like and graphitization in a conveying pipeline are avoided, and the sensible heat and high-temperature water vapor resources of the coke oven raw gas are fully reserved.
The problems of long process flow, serious pollution, carbon deposition and poisoning of the catalyst in the catalytic conversion process and the like in the prior art of preparing the synthesis gas by reforming the coke oven clean gas are solved. The coke oven raw gas provided by the application makes full use of sensible heat of the coke oven raw gas and latent heat of steam in the coke oven raw gas, avoids the problems, solves the problem that phenol-cyanogen-containing wastewater is difficult to treat in the existing coking process, and opens up a new way for the utilization of the coke oven raw gas.
The method has the characteristics of simple equipment, low investment, low pollution, no generation of liquid waste, guarantee of high-temperature conveying and the like.
The above embodiments are only exemplary embodiments of the present application, and are not intended to limit the present application, and the protection scope of the present application is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present application and such modifications and equivalents should also be considered to be within the scope of the present application.
Claims (10)
1. The device for conveying the coke oven crude gas at the high temperature is characterized by comprising a fireproof bottom interlayer (13), wherein a jacket layer is arranged on the upper part of the fireproof bottom interlayer (13), and the jacket layer sequentially comprises from inside to outside: an inner cavity (1), a fireproof inner interlayer (2), a jacket cavity (3), a fireproof outer interlayer (4), a metal shell (5) and a heat-insulating layer (6);
the combustor (8) and the flue gas outlet (11) are respectively communicated with the jacket cavity (3) through the jacket layer by the heat insulation layer (6); the burner (8) comprises; a gas inlet pipe (9) and an air inlet pipe (10); the heat pipe is used for supplying heat to the jacket cavity (3) by utilizing heat generated by combustion of fuel gas input by the fuel gas inlet pipe (9) and air input by the air inlet pipe (10), so that the inner cavity (1) meets a preset high-temperature condition;
the coke oven crude gas inlet pipe (7) and the coke oven crude gas outlet pipe (12) are respectively communicated with the inner cavity (1) through the jacket layer by the heat insulation layer (6) in a penetrating way; the coke oven raw gas inlet pipe (7) is used for conveying the coke oven raw gas reaching the preset input temperature condition in the coke oven carbonization chamber into the inner cavity (1); the coke oven crude gas outlet pipe (12) is used for conveying high-temperature coke oven crude gas to the non-catalytic reforming furnace.
2. The device according to claim 1, characterized in that the inner refractory insulation (2), the outer refractory insulation (4) and the bottom refractory insulation (13) are respectively built or cast of refractory material; refractory materials with high temperature resistance, wear resistance, heat resistance, shock resistance and slagging resistance; the refractory material has the characteristics of high temperature resistance, wear resistance, heat resistance, shock resistance and slagging resistance, and the refractoriness is more than 1100 ℃;
the thickness of the fireproof inner interlayer (2) is 40-90 mm;
the thickness of the fire-resistant outer interlayer (4) is 100-200 mm;
the thickness of the fireproof bottom interlayer (13) is 150-250 mm.
3. The device according to claim 1, characterized in that the insulating layer (6) is a thermal insulating material, the service temperature of which is greater than 1200 ℃.
4. The device according to claim 1, characterized in that the metal casing (5) is carbon steel.
5. The device according to claim 1, characterized in that a plurality of said burners (8) are respectively arranged on both sides of the device, and said burners (8) are staggered at intervals of 4-6 m.
6. The device according to claim 1, characterized in that it comprises a plurality of said coke oven raw gas inlet pipes (7);
the coke oven raw gas inlet pipe (7) is arranged above the burner (8), and the interval between the coke oven raw gas inlet pipe and the burner is equal to the interval between two adjacent coke oven carbonization chambers.
7. A method for conveying coke oven crude gas at high temperature, which is characterized in that the method is applied to the device of any one of claims 1-6, and comprises the following steps:
s1, replacing air in the inner cavity (1) and the jacket cavity (3) with nitrogen to enable the oxygen content to meet the preset oxygen content condition;
s2, supplying heat to the jacket cavity (3) in the combustor by using heat generated by combustion of fuel gas input by the fuel gas inlet pipe (9) and air input by the air inlet pipe (10) so as to enable the inner cavity (1) to reach and maintain a preset high-temperature condition;
s3, judging whether the temperature in the inner cavity (1) meets a preset high-temperature condition or not;
s4, if yes, conveying the coke oven crude gas reaching the preset input temperature condition in the coke oven carbonization chamber into the inner cavity (1).
8. The device according to claim 7, characterized in that said preset high temperature conditions are, in particular: the temperature in the inner cavity (1) is more than 600 ℃.
9. The device according to claim 7, characterized in that said preset input temperature conditions are, in particular: the temperature of the coke oven crude gas reaches the temperature range of 600-800 ℃.
10. The device according to claim 7, characterized in that said preset oxygen content conditions are, in particular: the oxygen content is less than 0.5%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910213163.0A CN110778842B (en) | 2019-03-20 | 2019-03-20 | Method and device for conveying coke oven crude gas at high temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910213163.0A CN110778842B (en) | 2019-03-20 | 2019-03-20 | Method and device for conveying coke oven crude gas at high temperature |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD135232A1 (en) * | 1977-10-03 | 1979-04-18 | Wolfgang Brandenburg | DEVICE FOR HEATING PIPES |
| CN202419133U (en) * | 2011-12-30 | 2012-09-05 | 山东潍焦集团有限公司 | Special conveying pipeline for coke oven gas |
| CN102884363A (en) * | 2010-04-14 | 2013-01-16 | 道达尔公司 | Heating device for a device for transporting a fluid containing a hydrocarbon |
| WO2015183121A1 (en) * | 2014-05-26 | 2015-12-03 | Общество с ограниченной ответственностью "Уникат" | Device for heating local areas of pipelines |
| CN207567163U (en) * | 2017-11-13 | 2018-07-03 | 江苏中磊节能科技发展有限公司 | Clean type heat recovery coke oven high-temperature flue |
-
2019
- 2019-03-20 CN CN201910213163.0A patent/CN110778842B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD135232A1 (en) * | 1977-10-03 | 1979-04-18 | Wolfgang Brandenburg | DEVICE FOR HEATING PIPES |
| CN102884363A (en) * | 2010-04-14 | 2013-01-16 | 道达尔公司 | Heating device for a device for transporting a fluid containing a hydrocarbon |
| CN202419133U (en) * | 2011-12-30 | 2012-09-05 | 山东潍焦集团有限公司 | Special conveying pipeline for coke oven gas |
| WO2015183121A1 (en) * | 2014-05-26 | 2015-12-03 | Общество с ограниченной ответственностью "Уникат" | Device for heating local areas of pipelines |
| CN207567163U (en) * | 2017-11-13 | 2018-07-03 | 江苏中磊节能科技发展有限公司 | Clean type heat recovery coke oven high-temperature flue |
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