CN204897828U - Many cogeneration system of pyrolysis of coal gasification - Google Patents
Many cogeneration system of pyrolysis of coal gasification Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 156
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 64
- 238000002309 gasification Methods 0.000 title claims abstract description 50
- 239000007787 solid Substances 0.000 claims abstract description 28
- 238000000926 separation method Methods 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 22
- 238000003786 synthesis reaction Methods 0.000 claims description 22
- 238000009434 installation Methods 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 5
- 239000003250 coal slurry Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 58
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 20
- 238000000034 method Methods 0.000 description 19
- 239000000571 coke Substances 0.000 description 14
- 230000008569 process Effects 0.000 description 14
- 239000000047 product Substances 0.000 description 14
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000002956 ash Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000010791 quenching Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 5
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 239000003077 lignite Substances 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000002194 synthesizing effect Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 239000010883 coal ash Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model relates to a many cogeneration system of pyrolysis of coal gasification, its system is including the coal drying device, coal grinding apparatus, coal pressurization conveyor, pyrolysis of coal device, gas - solid separator device, cryogenic separation device and the synthesizer that connect gradually, gas - solid separator device still respectively with propose the pressure equipment and put and be connected with the gasifier, carry the pressure equipment put with the gasifier still respectively with subtract the temperature drop depressor and be connected, it still is connected with the pyrolysis of coal device to subtract the temperature drop depressor. Its energy consumption reduces, and the feature of environmental protection can be good, and coal adaptability is good, makes things convenient for the manufacturing of equipment, eliminates the potential safety hazard, improves the effect.
Description
Technical field
The utility model belongs to pyrolysis of coal and gasification technology field, relates to a kind of coal pyrolytic gasified polygenerations systeme.
Background technology
China is big coal country of the world, Ye Shi consumption of coal big country.With regard to endowment of resources, the feature that China's primary energy source has " oil-poor, weak breath, rich coal ".Within 2010, coal resources in China proven reserve account for 93.3% of China's fossil energy, and coal is the most reliable energy ensureing that Chinese energy safety is supplied at present, are also simultaneously present stage the most cheap available energy.The energy reserve of China, production and consumption structures shape coal are still the main energy sources of China within one period from now on.The development of Coal Gasification Technology has the history of over one hundred year, define the multiple technologies schools such as fixed bed, air flow bed, fluidized-bed gradually, air-flow bed coal-gasification technology because of its gasification temperature high, vapor pressure is large, bed journey flow velocity is fast, and having that efficiency is high, scale is large, coal adaptability is good, efficiency of carbon conversion advantages of higher, progressively becomes the optimization technique of coal conversion; The shortcomings such as it is low that but it also exists cold gas efficiency, and synthetic gas sensible heat utilization is insufficient; Especially coal is particularly in long-flame coal, brown coal, this just contains the chemical substance of a large amount of high heating value, as methane, tar and carbon monoxide, hydrogen etc., these materials are all converted into the basic substance chemical compositions such as carbon monoxide, hydrogen, carbonic acid gas in high-temperature gasification process, through purification, synthesize more complicated material, methyl alcohol, dme, ethanol and olefines chemical, waste huge energy and the discharge of adjoint large quantity of exhaust gas.
Pyrolysis of coal typically refers to raw coal under isolated air or inert atmosphere conditions, carries out the heat temperature raising that continues and ensures do not have katalysis, the change of the series of physical occurred in this course and chemistry.Make coal through pyrolytic reaction, the Chemicals of production comprise the coal gas of pyrolysis, tar or phenolic product, coke or semicoke (blue charcoal).The engineering of existing multiple pyrolysis of coal technology, particularly practical application, does not solve the technical problems such as energy consumption is high, environmental pollution large, coal adaptability is bad all the time very well.
Number of patent application is " 201410257589.3 ", name is called the Chinese invention patent application of " a kind of pulverized coal pyrolysis and gasification process ", disclose a kind of method of fine coal and gasification, it adopts two-stage gasifier, (namely air flow bed char Gasification stove and air flow bed pulverized coal pyrolysis stove are divided into two sections), if well-known airflow bed gasification furnace needs to reach good carbon conversion efficiency, need higher gasification temperature, to realize the abundant gasification of coal (semicoke), the feature wherein describing gasification temperature is 1200 ~ 1600 DEG C; The high temperature of 1200 ~ 1600 DEG C will produce following many adverse influences to pyrolytic process: high temperature can cause the twice decomposition of the contour value-added product of tar, and the processing and manufacturing difficulty of the equipment such as reactor valves improves greatly, the most key is that too high pyrolysis temperature brings great potential safety hazard to whole technological process; And it is provided with waste heat boiler in pyrolysis section outlet, as everyone knows, in pyrolysis of coal process, a large amount of tar class products can be produced, according to its technical process, these tar class products and semicoke, pyrolysis gas etc. mix, after entering waste heat boiler, these materials release sensible heat also reduces temperature, and now tar-like substance will be separated out because of cooling, with semicoke pickup in useless pot, thus cause very disadvantageous effect.
On the whole, pyrolysis of coal of the prior art and gasification instrument and supplies method exist that energy consumption is high, environmental pollution large, coal adaptability is bad more, and the processing and manufacturing difficulty of equipment is large, potential safety hazard is comparatively large, the problems such as effect is poor, for this reason, need a kind of coal pyrolytic gasified polygenerations systeme and pyrolysis gasification method thereof, solve the problems referred to above existing in prior art, can reduction be consumed, good environmental protection, coal adaptability is good, facilitate the processing and manufacturing of equipment, eliminate safe hidden trouble, improve effect.
Utility model content
The purpose of this utility model is to provide a kind of coal pyrolytic gasified polygenerations systeme, energy consumption existing in solution prior art is high, environmental pollution large, coal adaptability is bad, the processing and manufacturing difficulty of equipment is large, and potential safety hazard is comparatively large, the problems such as effect is poor, reduction can be consumed, good environmental protection, coal adaptability is good, facilitates the processing and manufacturing of equipment, eliminate safe hidden trouble, improve effect.
For achieving the above object, the utility model provides a kind of coal pyrolytic gasified polygenerations systeme on the one hand, comprises the coal drying installation, coal-grinding apparatus, coal pressure conveyer device, pyrolysis of coal device, gas-solid separating device, cryogenic separation device and the synthesizer that connect successively; Gas-solid separating device is also connected with vapourizing furnace with pressure-raising device respectively; Pressure-raising device and vapourizing furnace are also connected with desuperheat step-down transformer respectively; Desuperheat step-down transformer is also connected with pyrolysis of coal device.
In above scheme preferably, semicoke feeding unit is connected with between vapourizing furnace and gas-solid separating device.
Can also preferably, pressure-raising device adopts gas boosting device.
Can also preferably, cryogenic separation device is connected with tar recovery system.
Can also preferably, pressure-raising device adopts circulation gas increasing apparatus.
Can also preferably, vapourizing furnace adopts coal slurry gasifier, airflow bed gasification furnace or circle fluidized-bed gasification furnace, and coal, oxygenant and auxiliary agent are mixed combining combustion or incomplete combustion by it, generates high-temperature synthesis gas, lime-ash.
Coal pyrolytic gasified polygenerations systeme of the present utility model adopts pyrolysis gasification method, first, utilizes coal drying installation by moisture removal in raw coal, and by the raw coal input coal-grinding apparatus after dehydration, the raw coal after dehydration is ground the fine coal becoming uniform granularity, then, fine coal is inputted in coal pressure conveyer device, carry out pressure rising, and the fine coal after being raised by pressure is conveyed in pyrolysis of coal device, in pyrolysis of coal device, the high-temperature synthesis gas originating from vapourizing furnace fully mixes and heat exchange with fine coal, fine coal carries out pyrolysis after temperature improves, generate semicoke and pyrolyzed components, synthetic gas after semicoke and pyrolyzed components and cooling mixes, and the synthetic gas after semicoke and pyrolyzed components and cooling is input in gas-solid separating device, be separated into gaseous fraction and solid ingredient, solid ingredient and high-temperature semi-coke thing, again high-temperature semi-coke thing is delivered to vapourizing furnace, high-temperature semi-coke thing and oxygenant and auxiliary agent thereof are carried out high-temperature gasification, generate synthetic gas and lime-ash, and the high-temperature synthesis gas after high-temperature gasification and lime-ash are discharged the body of heater of vapourizing furnace, the high-temperature synthesis gas of generation is delivered to pyrolysis of coal device, and make the isolated gas part of gas-solid separating device loop back vapourizing furnace as Quench gas by pressure-raising device, a part enters cryogenic separation device and isolates tar and methane content, and remaining crude synthesis gas enters synthesizer.
In above scheme preferably, utilize coal drying installation by moisture removal in raw coal, make moisture removal to 15% of former moisture in coal.
Can also preferably, raw coal adopts lump coal or fine coal.
Preferably, remaining crude synthesis gas can also be entered synthesizer synthesizing methane or synthetic ammonia.
Compared with prior art, the utility model has the following advantages:
The utility model provides a kind of coal pyrolytic gasified polygenerations systeme, and the energy consumption existing for can solving in prior art is high, environmental pollution large, coal adaptability is bad, and the processing and manufacturing difficulty of equipment is large, and potential safety hazard is comparatively large, the problems such as effect is poor; It realizes coal, particularly the low-rank coal such as brown coal, mud coal, coal gangue carries out drying, pyrolysis, gasification, sepn process on the spot, extract coal part volatile matter and tar component, produce the raw material of high-temperature semi-coke as gasification, and then carry out gasification generation high-temperature synthesis gas, as the source of pyrolysis, gasification and the interdependence of pyrolysis of coal unit, cooperatively interact, reach material, the energy distribute use rationally, reduce and pollute, improve productive rate, make full use of heat, simultaneity factor is simple to operate, controllability is good, and plant running is stablized; And energy consumption reduces, good environmental protection, and coal adaptability is good, facilitates the processing and manufacturing of equipment, eliminates safe hidden trouble, improve effect.Compared with prior art, the huge heat that the utility model can effectively utilize gasification to produce, the thermal source as pyrolysis of coal makes full use of, and the high-temperature semi-coke that pyrolysis produces is as the raw material of gasification, avoids quenching process, thus saves mass energy.Its major advantage is: low-rank coal smalls can be utilized as raw material, the multiple high pyrolysis product of gasification and pyrolysis by-product, and energy is economized, good environmental protection, does not have quenching process, decreases the discharge of sewage, waste gas and heat energy.Being applicable to low-rank coal is particularly the chemical such as raw material methyl alcohol, synthetic ammonia for the low-rank coal such as brown coal, mud coal and long-flame coal, bituminous coal etc., and by-product tar, methane etc.; Its overall thermal efficiency is high, is convenient to remove coal pollutent; It improves the comprehensive utilization ratio of coal resources, and is conducive to environment protection.
Accompanying drawing explanation
Fig. 1 is the structural representation of coal pyrolytic gasified polygenerations systeme of the present utility model;
Fig. 2 is the process flow sheet of the pyrolytic gasification of coal pyrolytic gasified polygenerations systeme of the present utility model.
In figure, 1 is coal drying installation, and 2 is coal-grinding apparatus, and 3 is coal pressure conveyer device, and 4 is pyrolysis of coal device, and 5 is gas-solid separating device, and 6 is vapourizing furnace, and 7 is pressure-raising device, and 8 is cryogenic separation device, and 9 is synthesizer, and 10 is desuperheat step-down transformer.
Embodiment
In order to understand the utility model better, below in conjunction with specific embodiment, the utility model is explained in detail.But, obviously can carry out different modification and remodeling to the utility model and not exceed the wider spirit and scope of the utility model of appended claims.Therefore, following examples have exemplary and hard-core implication.
Embodiment 1:
A kind of coal pyrolytic gasified polygenerations systeme, comprises the coal drying installation 1, coal-grinding apparatus 2, coal pressure conveyer device 3, pyrolysis of coal device 4, gas-solid separating device 5, cryogenic separation device 8 and the synthesizer 9 that connect successively; Gas-solid separating device 5 is also connected with vapourizing furnace 6 with pressure-raising device 7 respectively; Pressure-raising device 7 is also connected with desuperheat step-down transformer 10 respectively with vapourizing furnace 6; Desuperheat step-down transformer 10 is also connected with pyrolysis of coal device 4.
In the above-described embodiments, semicoke feeding unit is connected with between vapourizing furnace 6 and gas-solid separating device 5.
In the above-described embodiments, pressure-raising device 7 adopts gas boosting device 7.
In the above-described embodiments, cryogenic separation device 8 is connected with tar recovery system.
In the above-described embodiments, pressure-raising device 7 adopts circulation gas increasing apparatus.
In the above-described embodiments, vapourizing furnace 6 is connected with desuperheat step-down transformer.
The pyrolysis gasification method of coal pyrolytic gasified polygenerations systeme of the present utility model, adopt coal pyrolytic gasified polygenerations systeme as described in Example 1, first, utilize coal drying installation 1 by moisture removal in raw coal, and by the raw coal input coal-grinding apparatus 2 after dehydration, the raw coal after dehydration is ground the fine coal becoming uniform granularity, then, fine coal is inputted in coal pressure conveyer device 3, carry out pressure rising, and the fine coal after being raised by pressure is conveyed in pyrolysis of coal device 4, in pyrolysis of coal device 4, the high-temperature synthesis gas originating from vapourizing furnace 6 fully mixes and heat exchange with fine coal, fine coal carries out pyrolysis after temperature improves, generate semicoke and pyrolyzed components, synthetic gas after semicoke and pyrolyzed components and cooling mixes, and the synthetic gas after semicoke and pyrolyzed components and cooling is input in gas-solid separating device 5, be separated into gaseous fraction and solid ingredient, solid ingredient and high-temperature semi-coke thing, again high-temperature semi-coke thing is delivered to vapourizing furnace 6, high-temperature semi-coke thing and oxygenant and auxiliary agent thereof are carried out high-temperature gasification, generate lime-ash, and the high-temperature synthesis gas after high-temperature gasification and lime-ash are discharged the body of heater of vapourizing furnace 6, the high-temperature synthesis gas of generation is delivered to pyrolysis of coal device 4, and make the isolated gas part of gas-solid separating device 5 loop back vapourizing furnace 6 as Quench gas by pressure-raising device 7, a part enters cryogenic separation device 8 and isolates tar and methane content, and remaining crude synthesis gas enters synthesizer 9.
In the above-described embodiment, utilize coal drying installation 1 by moisture removal in raw coal, make moisture removal to 15% of former moisture in coal.
In the above-described embodiment, raw coal adopts lump coal or fine coal.
In the above-described embodiment, remaining crude synthesis gas is entered synthesizer 9 synthesizing methane or synthetic ammonia.
As depicted in figs. 1 and 2, the utility model utilizes coal drying installation 1 to be removed by moisture in coal; Coal-grinding apparatus 2 is utilized coal to be ground into the device of certain granules degree; Utilize coal pressure conveyer device 3 pairs of coals to pressurize, and by strength or machinery, coal is carried; Utilize pyrolysis of coal device 4 to use outside heat to heat coal, namely directly contacted with feed coal by high temperature gas mixture, the component such as volatile matter and tar is separated out in coal pyrolysis in heat-processed, generates semicoke; Gas-solid separating device 5 is utilized to adopt cyclonic separator, fly-ash filter, sack cleaner, electric precipitator etc. to be separated with solid by gas; Utilizing vapourizing furnace 6 that coal, oxygenant and other auxiliary agents are mixed combining combustion or incomplete combustion, generating high-temperature synthesis gas, lime-ash, as utilized coal slurry gasifier 6, airflow bed gasification furnace 6, circle fluidized-bed gasification furnace 6 etc.; Pressure-raising device 7 is utilized low-pressure gas to be improved mechanical means or the structure of pressure, as gas compressor, injector, surge tank, lock hopper etc.
The utility model passes through the pyrolysis of coal and the organic assembling of gasification, pyrolysis thermal source is made all to come from the crude synthesis gas of gasification generation, both the sensible heat that make use of gasification product carries out the pyrolysis of raw coal, turn avoid the burnt process of breath, the semicoke of high temperature directly enters vapourizing furnace 6, improve gasification output, significantly improve the comprehensive utilization ratio of coal; Product after its pyrolysis, high-temperature semi-coke, does not need to carry out quenching temperature-fall period, directly enters the raw material of vapourizing furnace 6 as gasification, saves energy, improve gasification temperature and efficiency; Its raw coal carries out pyrolysis and gasification after completing coal-grinding, pressurization, and avoid high-temperature semi-coke and add and be pressed with very large difficulty, the crude synthesis gas of high temperature, high pressure and fine coal carry out direct heat exchange, have high heat exchange efficiency; In its crude synthesis gas, the semicoke blending of the thin lime-ash of carbon containing directly and after pyrolysis, by again getting back to vapourizing furnace 6 after gas solid separation, carries out cycle gasification, improves the efficiency of carbon conversion of gasification system; Its crude synthesis gas and coal are in pyrolysis of coal device 4, and carry out heat exchange by the mode directly contacted, material dispersion is effective, and heat exchange efficiency is high, good effect of heat exchange, and does not need heat exchanger structure, as long as one section of space of carrying out mixing is as heat exchange bed journey; Its partial thermal decomposition gas loops back vapourizing furnace 6 through pressure-raising device 7, and mix with the synthetic gas that vapourizing furnace 6 produces, realize the effect of Quench cooling, by regulating and controlling this part tolerance, further realization is to the control of pyrolysis oven internal temperature, and at different temperatures, different pyrolysis of coal products can be obtained; Its raw coal adopts the mode of power feed to enter pyrolysis of coal device 4 after coal-grinding, pressurization, compares carrier gas mode of movement, can energy efficient, and significantly reduces rear end gas-solid separating device 5 treatment capacity.
The utility model, at the outlet high-temperature synthesis gas section place of vapourizing furnace 6, has carried out gas Quench, and will fill into a large amount of cold cycle synthetic gas in high-temperature synthesis gas, by controlling tolerance, regulating the temperature in heat stage further, and making temperature field reach even.Solve following problem existing in prior art: if airflow bed gasification furnace 6 needs to reach good carbon conversion efficiency, need higher gasification temperature, the feature of existing gasification temperature is 1200 ~ 1600 DEG C, the high temperature of 200 ~ 1600 DEG C will produce many adverse influences to pyrolytic process: high temperature can cause the twice decomposition of the contour value-added product of tar, and the processing and manufacturing difficulty of the equipment such as reactor valves improves greatly, the most key is that too high pyrolysis temperature brings great potential safety hazard to whole technological process.
The utility model adopts the coal pressure conveyer device 3 of mechanical system fine coal to be delivered to pyrolysis section, the carrier gas mode of movement compared to existing technology, can energy-conservation about 65%, and greatly reduces rear end gas-solid separating device 5 treatment capacity.
The utility model, after pyrolysis of coal, carries out the gas solid separation of semicoke, synthetic gas, and the sensible heat of semicoke brings vapourizing furnace 6 into, and the sensible heat of synthetic gas is recycled by waste heat boiler; Solve following problem existing in prior art: in pyrolysis of coal process, a large amount of tar class products can be produced, these tar class products and semicoke, pyrolysis gas etc. mix, after entering waste heat boiler, these materials release sensible heat also reduces temperature, now tar-like substance will be separated out because of cooling, with semicoke pickup in useless pot, thus cause very disadvantageous effect.
The utility model makes through fine coal that is predrying, coal-grinding, and enter pyrolysis of coal device 4 by coal pressure conveyer device 3, the high-temperature synthesis gas of producing with vapourizing furnace 6 mixes, and heats upgrading.Raw coal generates the pyrolyzed components such as semicoke, tar and methane, carbon monoxide, hydrogen after pyrolysis, mixes with synthetic gas; Then enter gas-solid separating device 5, isolate high-temperature semi-coke and synthetic gas, high-temperature semi-coke is transported into vapourizing furnace 6 and gasifies, and generates synthetic gas and coal ash, and synthetic gas imports the thermal source of pyrolysis of coal device 4 as raw coal pyrolysis, and coal ash discharges system.The separation and acquisition of component is carried out by the way of physics or chemistry, output methane (LNG), tar, low-quality wet goods product and (CO+H by the synthetic gas after gas solid separation
2), (CO+H
2) carry out the products such as synthesizing methanol, synthetic ammonia, ethanol, methane further.
The heat of the high-temperature synthesis gas that coal utilization gasification produces is carried out pyrolysis by the utility model; and the product semicoke after pyrolysis is gasified; pyrolysis gas extracts high heating value component; as the benefit materials such as tar, methane; high-temperature semi-coke is as the raw material of gasification; thus improve the comprehensive utilization ratio of coal resources, and be conducive to environment protection.
Claims (6)
1. a coal pyrolytic gasified polygenerations systeme, comprises the coal drying installation (1), coal-grinding apparatus (2), coal pressure conveyer device (3), pyrolysis of coal device (4), gas-solid separating device (5), cryogenic separation device (8) and the synthesizer (9) that connect successively; It is characterized in that: gas-solid separating device (5) is also connected with vapourizing furnace (6) with pressure-raising device (7) respectively; Pressure-raising device (7) is also connected with desuperheat step-down transformer (10) respectively with vapourizing furnace (6); Desuperheat step-down transformer (10) is also connected with pyrolysis of coal device (4).
2. coal pyrolytic gasified polygenerations systeme as claimed in claim 1, is characterized in that: be connected with semicoke feeding unit between vapourizing furnace (6) and gas-solid separating device (5).
3. coal pyrolytic gasified polygenerations systeme as claimed in claim 2, is characterized in that: pressure-raising device (7) adopts gas boosting device (7).
4. coal pyrolytic gasified polygenerations systeme as claimed in claim 3, is characterized in that: cryogenic separation device (8) is connected with tar recovery system.
5. coal pyrolytic gasified polygenerations systeme as claimed in claim 1, is characterized in that: pressure-raising device (7) adopts circulation gas increasing apparatus.
6. coal pyrolytic gasified polygenerations systeme as claimed in claim 1, it is characterized in that: vapourizing furnace (6) adopts coal slurry gasifier, airflow bed gasification furnace or circle fluidized-bed gasification furnace, coal, oxygenant and auxiliary agent are mixed combining combustion or incomplete combustion by it, generate high-temperature synthesis gas, lime-ash.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105062526A (en) * | 2015-08-05 | 2015-11-18 | 航天长征化学工程股份有限公司 | Coal pyrolysis gasification poly-generation system and pyrolysis gasification method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105062526A (en) * | 2015-08-05 | 2015-11-18 | 航天长征化学工程股份有限公司 | Coal pyrolysis gasification poly-generation system and pyrolysis gasification method thereof |
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