CN103965969B - Combined coal pyrolytic gasified system - Google Patents
Combined coal pyrolytic gasified system Download PDFInfo
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- CN103965969B CN103965969B CN201410211286.8A CN201410211286A CN103965969B CN 103965969 B CN103965969 B CN 103965969B CN 201410211286 A CN201410211286 A CN 201410211286A CN 103965969 B CN103965969 B CN 103965969B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention discloses a kind of combined coal pyrolytic gasified system, comprise feed coal dehumidification system, compound coal bunker, combined vapourizing furnace and combined pyrolysis oven, combined vapourizing furnace is located at the top of combined pyrolysis oven; The operation scheme of combined vapourizing furnace adopts fluidized-bed form, and its inside is provided with vapourizing furnace built-in splitter; The heating gas outlet pipe of this vapourizing furnace built-in splitter is connected with the inlet mouth of shell-and-tube exhaust-heat boiler; The operation scheme of combined pyrolysis oven adopts fluidized-bed form, and its inside is provided with pyrolysis oven built-in splitter; The raw gas outlet pipe of this pyrolysis oven built-in splitter is connected with the inlet mouth of pyrolysis gas cleaning system.The discharge port of combined vapourizing furnace is connected with the hot semicoke import of combined pyrolysis oven by hot semicoke material returning valve with the discharge port of vapourizing furnace built-in splitter.Achieve coal grading to utilize, be conducive to energy-saving and emission-reduction, and the economic benefit of enterprise can be improved.
Description
Technical field
The present invention relates to a kind of pyrolysis of coal device and gasification installation, particularly the combined coal pyrolytic gasified system of one.
Background technology
The Area distribution such as China northern Shensi, Inner Mongol, Xinjiang and Yunnan have a large amount of low-disintegration coal kind, as brown coal and long-flame coal, such coal has the characteristics such as resource reserve is large, buried regions is shallow, ature of coal is good, cost of winning is low, chemically reactive is good, high volatile golf calorific value, no adhesion, is conducive to extracting tar and chemical fuel gas by pyrolysis.But, current coal in China pyrolysis installation mostly adopts lump coal, the a large amount of fine coal produced in recovery process are not used, and current low-temperature pyrolysis process can produce a large amount of raw gas that can not utilize further, thus the effective constituent of coal resources can not be fully used, and has very large harm to environment.Therefore, improve coal resources utilization ratio, develop the clean coal technology based on Poly-generation, the staged conversion realizing coal is coal conversion and the development trend utilizing technology.
Denomination of invention is the Chinese patent ZL2012111087202.2 of combined cyclone bed vapourizing furnace, discloses a kind of combined cyclone bed vapourizing furnace, comprises cyclone bed vapourizing furnace, shell-and-tube exhaust-heat boiler, two-stage gas filter drain cock; One-level gas filter drain cock is placed in the inside of cyclone bed vapourizing furnace, and top flushes with the top of cyclone bed vapourizing furnace; One-level gas filter drain cock is cyclonic separator form, and the sidewall of one-level gas filter drain cock is provided with water-cooled coil pipe; The heating gas outlet of one-level gas filter drain cock is connected with the inlet mouth of shell-and-tube exhaust-heat boiler, the outlet of water-cooled coil pipe is connected with the water-in of shell-and-tube exhaust-heat boiler, and the water outlet of shell-and-tube exhaust-heat boiler is provided with outer for vapor interface and cyclone bed vapourizing furnace vapor interface; The air outlet of shell-and-tube exhaust-heat boiler is connected with secondary gas filter drain cock, and the gas exit of secondary gas filter drain cock is provided with outer give gas interface and cyclone bed vapourizing furnace coal gas interface.This system device is simple, cheap, water loss is low, and the low-carbon (LC) being applicable to low-disintegration coal kind transforms.
At least there is following problem in above-mentioned prior art:
Aforesaid combination type cyclone bed vapourizing furnace using the low metamorphic lignite of high volatile and long-flame coal for volatile matter wherein being proposed during raw material and then the product such as the tar of output preciousness and pyrolysis coal gas, thus reduces making full use of of effective constituent in coal.
Summary of the invention
The object of this invention is to provide that a kind of structure is simple, running cost is low, it is low to pollute, be applicable to the technology and equipment of combined coal pyrolytic gasified system of High water cut, low-disintegration coal kind.
To achieve these goals, the technical solution used in the present invention is:
Combined coal pyrolytic gasified system of the present invention, comprise compound coal bunker, combined vapourizing furnace and combined pyrolysis oven, described combined vapourizing furnace is located at the top of described combined pyrolysis oven, and a discharge port of described compound coal bunker is connected with the opening for feed of described combined vapourizing furnace, another discharge port is connected with the opening for feed of described combined pyrolysis oven;
The operation scheme of described combined vapourizing furnace adopts fluidized-bed form, its inside is provided with the vapourizing furnace built-in splitter of many imports, cyclonic separation form, and the central axis of described vapourizing furnace built-in splitter and the central axes of described combined vapourizing furnace, top flush with the top of described combined vapourizing furnace and be provided with heating gas outlet pipe;
Described heating gas outlet pipe is connected with the inlet mouth of shell-and-tube exhaust-heat boiler, the air outlet of described shell-and-tube exhaust-heat boiler is connected with the inlet mouth of hard tube fly-ash separator, the purification gas exit of described hard tube fly-ash separator is connected to coal gas surge tank and product gasification gas exit respectively by variable valve and gas compressor, the wall of described vapourizing furnace built-in splitter is provided with water-cooled coil pack, and the outlet of described water-cooled coil pack is connected with the admission port of described shell-and-tube exhaust-heat boiler;
The operation scheme of described combined pyrolysis oven adopts fluidized-bed form, its inside is provided with the pyrolysis oven built-in splitter of many imports, cyclonic separation form, and the central axis of described pyrolysis oven built-in splitter and the central axes of described combined pyrolysis oven, top flush with the top of described combined pyrolysis oven and be provided with raw gas outlet pipe;
Described raw gas outlet pipe is connected with the inlet mouth of pyrolysis gas cleaning system, the pyrolysis gas exit of described pyrolysis gas cleaning system is connected to described coal gas surge tank and product pyrolysis gas exit respectively by variable valve and gas compressor, the wall of described pyrolysis oven built-in splitter is provided with air cooling membrane wall assembly, the inlet mouth of described air cooling membrane wall assembly exports with the cooled coal gas after purification and is connected, and the air outlet of described air cooling membrane wall assembly is connected with described combined pyrolysis oven.
As seen from the above technical solution provided by the invention, combined coal pyrolytic gasified system of the present invention, owing to have employed combination process and the equipment such as combined vapourizing furnace, combined pyrolysis oven and steam fluidized bed dryer, when using the powdery low-disintegration coal kind of high volatile to carry out low-carbon (LC) conversion, volatile matter wherein can be proposed, and then the product such as the tar of output preciousness and pyrolysis coal gas, not only achieve coal grading to utilize, the cascade utilization of heat energy, be conducive to energy-saving and emission-reduction, and the economic benefit of enterprise can be improved.
Accompanying drawing explanation
The process principle figure of the combined coal pyrolytic gasified system that Fig. 1 provides for the embodiment of the present invention;
Fig. 2 is the process principle figure of embodiment of the present invention Raw coal drying system.
In figure:
1-compound coal bunker; 2-combined vapourizing furnace; 3-combined pyrolysis oven; 4-vapourizing furnace built-in splitter; 5-pyrolysis oven built-in splitter; 6-shell-and-tube exhaust-heat boiler; 7-hard tube fly-ash separator; 8-hot semicoke material returning valve; 9-pyrolysis gas cleaning system; 10-semicoke temperature-reducing tower; 11-coal gas surge tank; 12-steam coke quenching tank; 13-gas compressor;
21-raw material coal bunker; 22-steam fluidized bed dryer; 23-electrostatic fabric filter; 24-steam temperature reducing and pressure reducing device.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the embodiment of the present invention is described in further detail.
Combined coal pyrolytic gasified system of the present invention, its preferably embodiment be:
Comprise compound coal bunker, combined vapourizing furnace and combined pyrolysis oven, described combined vapourizing furnace is located at the top of described combined pyrolysis oven, and a discharge port of described compound coal bunker is connected with the opening for feed of described combined vapourizing furnace, another discharge port is connected with the opening for feed of described combined pyrolysis oven;
The operation scheme of described combined vapourizing furnace adopts fluidized-bed form, its inside is provided with the vapourizing furnace built-in splitter of many imports, cyclonic separation form, and the central axis of described vapourizing furnace built-in splitter and the central axes of described combined vapourizing furnace, top flush with the top of described combined vapourizing furnace and be provided with heating gas outlet pipe;
Described heating gas outlet pipe is connected with the inlet mouth of shell-and-tube exhaust-heat boiler, the air outlet of described shell-and-tube exhaust-heat boiler is connected with the inlet mouth of hard tube fly-ash separator, the purification gas exit of described hard tube fly-ash separator is connected to coal gas surge tank and product gasification gas exit respectively by variable valve and gas compressor, the wall of described vapourizing furnace built-in splitter is provided with water-cooled coil pack, and the outlet of described water-cooled coil pack is connected with the admission port of described shell-and-tube exhaust-heat boiler;
The operation scheme of described combined pyrolysis oven adopts fluidized-bed form, its inside is provided with the pyrolysis oven built-in splitter of many imports, cyclonic separation form, and the central axis of described pyrolysis oven built-in splitter and the central axes of described combined pyrolysis oven, top flush with the top of described combined pyrolysis oven and be provided with raw gas outlet pipe;
Described raw gas outlet pipe is connected with the inlet mouth of pyrolysis gas cleaning system, the pyrolysis gas exit of described pyrolysis gas cleaning system is connected to described coal gas surge tank and product pyrolysis gas exit respectively by variable valve and gas compressor, the wall of described pyrolysis oven built-in splitter is provided with air cooling membrane wall assembly, the inlet mouth of described air cooling membrane wall assembly exports with the cooled coal gas after purification and is connected, and the air outlet of described air cooling membrane wall assembly is connected with described combined pyrolysis oven.
The discharge port of described combined vapourizing furnace is connected with the hot semicoke import of described combined pyrolysis oven by hot semicoke material returning valve with the discharge port of vapourizing furnace built-in splitter, and the discharge port of described hard tube fly-ash separator is connected with the opening for feed of described hot semicoke material returning valve.
The vapour outlet of described shell-and-tube exhaust-heat boiler is connected with the fluidisation gas inlet of described combined vapourizing furnace and feed coal dehumidification system respectively.
The discharge port of described combined pyrolysis oven is connected with the opening for feed of semicoke temperature-reducing tower with the discharge port of pyrolysis oven built-in splitter, the discharge port of described semicoke temperature-reducing tower is connected with the opening for feed of steam coke quenching tank, and the discharge port of described steam coke quenching tank exports with product semicoke and is connected.
The exit end of described coal gas surge tank is connected with the gas feed of described semicoke temperature-reducing tower, and the pneumatic outlet of described semicoke temperature-reducing tower is connected with the fluidisation gas inlet of described combined pyrolysis oven.
Described feed coal dehumidification system comprises raw material coal bunker, bottom described raw material coal bunker, feed opening is connected with the opening for feed at steam fluidized bed dryer top, the top of described steam fluidized bed dryer is provided with secondary steam outlet, described secondary steam outlet is connected by the steam inlet of electrostatic fabric filter with described steam coke quenching tank, the steam outlet of described steam coke quenching tank is connected with the steam condenser pipe of described steam fluidized bed dryer inside, the vapour outlet of described shell-and-tube exhaust-heat boiler is connected by the fluidization steam vapor air distribution plate that steam temperature reducing and pressure reducing device is built-in with described steam fluidized bed dryer,
The bottom discharge port of described steam fluidized bed dryer is connected with described compound coal bunker.
Specific embodiment:
As shown in Figure 1, the semicoke that treated feed coal and system are produced is admitted to the bottom of combined vapourizing furnace 2 through compound coal bunker 1; Coal through the acting in conjunction of vaporized chemical water vapor and pure oxygen (oxygen enrichment or air), produces heat and also carries out partial gasification in stove; Semi-coke powder under the semicoke of combined vapourizing furnace 2 output and vapourizing furnace built-in splitter 4 are separated, semicoke outlet respectively bottom combined vapourizing furnace 2 sends into the ash outlet that is separated of separator the hot semicoke material returning valve 8 be connected with combined pyrolysis oven 3, then is admitted in combined pyrolysis oven 3.Meanwhile, in combined vapourizing furnace 2, the heat of gasification coal gas of output enters the heating gas entrance of shell-and-tube exhaust-heat boiler 6 through the outlet pipe of the vapourizing furnace built-in splitter 4 of its inside; Heating gas is cooled to about 360 DEG C and escapes and enter hard tube fly-ash separator 7 from the gas exit of shell-and-tube exhaust-heat boiler 6 in shell-and-tube exhaust-heat boiler 6 and after de-mineralized water heat exchange, coal gas after cooling is sent as product gasification gas wherein a part of after further dedusting, cooling in hard tube fly-ash separator 7, and another part gasification gas is sent in coal gas surge tank 11 after variable valve regulates and gas compressor 13 pressurizes; The ash output hole of semi-coke powder under hard tube fly-ash separator 7 removes bottom it is discharged and is admitted in combined pyrolysis oven 3 through overheated semicoke material returning valve 8 again.Heat up after de-mineralized water heat exchange simultaneously in waste heat boiler 6 output middle pressure steam, and wherein a part of steam is introduced in combined vapourizing furnace 2 as vaporized chemical; Another part steam can be used as thermal source and is admitted to feed coal dehumidification system.
As shown in Figure 1, treated feed coal is admitted to through compound coal bunker 1 the hot semicoke blending that the emulsion zone of combined pyrolysis oven 3 bottom and combined vapourizing furnace 2 output send into through hot semicoke material returning valve 8, and under the heating gas acting in conjunction sent here by semicoke temperature-reducing tower 10, carry out fluidisation and pyrolysis, output pyrolysis raw gas.
By the solid thermal carriers that the hot semicoke of combined vapourizing furnace 2 output is this pyrolytic process; The heating gas sent here by semicoke temperature-reducing tower 10 is then the gaseous heat-carrier of this pyrolytic process.
The raw gas of combined pyrolysis oven 3 output enters pyrolyzing coal gas purification system 9 after pyrolysis oven built-in splitter 5 dedusting of its inside, and raw gas is separated purified gas, tar and other Chemicals in pyrolysis gas cleaning system 9.A part for the normal temperature purified gas of pyrolysis gas cleaning system 9 output is drawn, sends in coal gas surge tank 11 after variable valve regulates and gas compressor 13 pressurizes.
As shown in Figure 1, feed coal in combined pyrolysis oven 3 after pyrolysis the hot semicoke outlet of the hot semicoke of output bottom it discharge and be admitted in semicoke temperature-reducing tower 10, hot semicoke within it with the low temperature coal gas heat exchange sent into by coal gas surge tank 11 after temperature be down to about 350 DEG C, enter in steam coke quenching tank 12 again, in steam coke quenching tank 12, with the secondary steam that the electrostatic fabric filter 23 shown in Fig. 2 is discharged, cooling is continued to semicoke.After the low temperature coal gas heat exchange sent into by coal gas surge tank 11, temperature rises to about 300 DEG C, and the fluidizing medium that this coal gas is used as combined pyrolysis oven 3 is sent in it.
As shown in Figure 2, in coal, contained humidity is greater than in the incoming stock coal bunker 21 of feed coal of 20%, then is admitted in steam fluidized bed dryer 22; In Fig. 1, the residual steam of shell-and-tube exhaust-heat boiler 6 output is sent in the steam temperature reducing and pressure reducing device 24 shown in this Fig. 2 to send in steam fluidized bed dryer 22 as fluidizing medium after desuperheat, reduced pressure treatment and is carried out steam fluidisation to feed coal; The outlet of the secondary steam carrying coal dust secretly through its top that steam fluidized bed dryer 22 is discharged is delivered to after electrostatic fabric filter 23 removes dust and is sent into the steam coke quenching tank 12 shown in Fig. 1 again; In steam coke quenching tank 12, the hot semicoke of about 350 DEG C that are admitted to and the secondary steam heat exchange of feeding, improve the temperature and pressure of steam, obtain solidifying Xie Shui after the heat exchange coil heat exchange that then it can be used as drying source feeding fluidized bed dryer 22 bottom to install, cooling and carry out reclaiming, utilizing.The discharge port of dried coal bottom fluidized bed dryer 22 is sent and is sent in the compound coal bunker 1 shown in Fig. 1.
The coal that specific embodiment is suitable for:
Be applicable to the middle low order coal of as received basis volatile matter >=20% in coal, as brown coal, long-flame coal, non-caking coal and weakly caking coal etc.; Feed coal ash oontent≤15 ~ 20%; To sulphur content no requirement (NR); Total moisture content < 50% in coal; In coal, the feed coal of total moisture content < 20% can directly enter in the compound coal bunker 1 described in Fig. 1.
The operating parameter of the combined coal pyrolysis gas gasifying device that specific embodiment provides:
(1) feed coal dehumidification system: feed coal precrushing granularity: 0 ~ 5mm; Required fluidization steam vapor parameter (air distribution plate ingress): 30kPa/150 ~ 200 DEG C.
(2) combined vapourizing furnace is low pressure operation, operating pressure: 15 ~ 30kPa; Operating temperature: 850 ~ 1000 DEG C.
(3) combined pyrolysis oven is that normal pressure runs, operating temperature 450 ~ 750 DEG C; Required fluidisation gas parameters (fluidizer ingress): 30kPa/280 ~ 300 DEG C.
The present invention adopts steam fluidized bed dryer, combined coal gasification apparatus and combined pyrolysis of coal device etc. to dewater and pyrolysis processing to High water cut, low-disintegration coal kind, and advantage is:
(1) present invention employs the technique proposing in advance volatile matter in coal, the multiple product such as semi coking tar, pyrolysis coal gas, gasification gas and semicoke in output, achieve various composition in coal reasonable, effectively utilize.
Adopt this invention, be particularly advantageous in the low-disintegration coal kind utilizing the ground reserves such as China Inner Mongol, Shaanxi, Yunnan and Xinjiang a lot; Be conducive to directly utilizing accounting for the fine coal that Coal Exploitation coal output reaches about 30%; Be conducive to the conversion on the spot of the coal of the vast central and west regions of China.
(2) the temperature counterpart of heat energy in the processing of coal, switching process and the cascade utilization of energy is achieved, therefore energy conversion efficiency is high: because combined vapourizing furnace 2 organically combines with combined pyrolysis oven 3 by present invention process, implementation Poly-generation is run, and combined vapourizing furnace 2 provides hot semicoke as solid thermal carriers to while output gasification gas product combined pyrolysis oven 3; The normal temperature pyrolysis coal gas gentleization coal gas of system produce in semicoke temperature-reducing tower 10 with hot semicoke heat exchange, heat up after as the fluidizing medium of combined pyrolysis oven 3 and gaseous heat-carrier loopback, make use of the sensible heat of semicoke product; The residue sensible heat of the hot semicoke of system produce is recycled further, utilizes in steam coke quenching tank 12.
(3) construction investment is low: described steam fluidized bed dryer 22, combined vapourizing furnace 2 and combined pyrolysis oven 3 all adopt fluidized-bed form, and its heat conduction efficiency is higher than other forms; System major equipment all adopts normal pressure and low pressure operation mode, and simple in equipment, volume are little, unit consumption of energy is little, floor space is few; Whole shell-and-tube exhaust-heat boiler 6 output close to the inner portion of steam needed for system, need not build boiler house, cost saving again.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (6)
1. a combined coal pyrolytic gasified system, it is characterized in that, comprise compound coal bunker, combined vapourizing furnace and combined pyrolysis oven, described combined vapourizing furnace is located at the top of described combined pyrolysis oven, and a discharge port of described compound coal bunker is connected with the opening for feed of described combined vapourizing furnace, another discharge port is connected with the opening for feed of described combined pyrolysis oven;
The operation scheme of described combined vapourizing furnace adopts fluidized-bed form, its inside is provided with the vapourizing furnace built-in splitter of many imports, cyclonic separation form, and the central axis of described vapourizing furnace built-in splitter and the central axes of described combined vapourizing furnace, top flush with the top of described combined vapourizing furnace and be provided with heating gas outlet pipe;
Described heating gas outlet pipe is connected with the inlet mouth of shell-and-tube exhaust-heat boiler, the air outlet of described shell-and-tube exhaust-heat boiler is connected with the inlet mouth of hard tube fly-ash separator, the purification gas exit of described hard tube fly-ash separator is connected to coal gas surge tank and product gasification gas exit respectively by variable valve and gas compressor, the wall of described vapourizing furnace built-in splitter is provided with water-cooled coil pack, and the outlet of described water-cooled coil pack is connected with the admission port of described shell-and-tube exhaust-heat boiler;
The operation scheme of described combined pyrolysis oven adopts fluidized-bed form, its inside is provided with the pyrolysis oven built-in splitter of many imports, cyclonic separation form, and the central axis of described pyrolysis oven built-in splitter and the central axes of described combined pyrolysis oven, top flush with the top of described combined pyrolysis oven and be provided with raw gas outlet pipe;
Described raw gas outlet pipe is connected with the inlet mouth of pyrolysis gas cleaning system, the pyrolysis gas exit of described pyrolysis gas cleaning system is connected to described coal gas surge tank and product pyrolysis gas exit respectively by variable valve and gas compressor, the wall of described pyrolysis oven built-in splitter is provided with air cooling membrane wall assembly, the inlet mouth of described air cooling membrane wall assembly exports with the cooled coal gas after purification and is connected, and the air outlet of described air cooling membrane wall assembly is connected with described combined pyrolysis oven.
2. combined coal pyrolytic gasified system according to claim 1, it is characterized in that, the discharge port of described combined vapourizing furnace is connected with the hot semicoke import of described combined pyrolysis oven by hot semicoke material returning valve with the discharge port of vapourizing furnace built-in splitter, and the discharge port of described hard tube fly-ash separator is connected with the opening for feed of described hot semicoke material returning valve.
3. combined coal pyrolytic gasified system according to claim 2, is characterized in that, the vapour outlet of described shell-and-tube exhaust-heat boiler is connected with the fluidisation gas inlet of described combined vapourizing furnace and feed coal dehumidification system respectively.
4. combined coal pyrolytic gasified system according to claim 3, it is characterized in that, the discharge port of described combined pyrolysis oven is connected with the opening for feed of semicoke temperature-reducing tower with the discharge port of pyrolysis oven built-in splitter, the discharge port of described semicoke temperature-reducing tower is connected with the opening for feed of steam coke quenching tank, and the discharge port of described steam coke quenching tank exports with product semicoke and is connected.
5. combined coal pyrolytic gasified system according to claim 4, it is characterized in that, the exit end of described coal gas surge tank is connected with the gas feed of described semicoke temperature-reducing tower, and the pneumatic outlet of described semicoke temperature-reducing tower is connected with the fluidisation gas inlet of described combined pyrolysis oven.
6. according to claim 3, combined coal pyrolytic gasified system described in 4 or 5, it is characterized in that, described feed coal dehumidification system comprises raw material coal bunker, bottom described raw material coal bunker, feed opening is connected with the opening for feed at steam fluidized bed dryer top, the top of described steam fluidized bed dryer is provided with secondary steam outlet, described secondary steam outlet is connected by the steam inlet of electrostatic fabric filter with described steam coke quenching tank, the steam outlet of described steam coke quenching tank is connected with the steam condenser pipe of described steam fluidized bed dryer inside, the vapour outlet of described shell-and-tube exhaust-heat boiler is connected by the fluidization steam vapor air distribution plate that steam temperature reducing and pressure reducing device is built-in with described steam fluidized bed dryer,
The bottom discharge port of described steam fluidized bed dryer is connected with described compound coal bunker.
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| CN104776426B (en) * | 2015-03-31 | 2017-05-31 | 李大鹏 | A kind of coal gas cooperates with generating, multi-joint-production apparatus and method with fine coal |
| CN105387459B (en) * | 2015-11-16 | 2018-04-20 | 神雾科技集团股份有限公司 | A kind of low order dirty coal classified utilization system and technique |
| CN105505475A (en) * | 2016-01-30 | 2016-04-20 | 农业部规划设计研究院 | Biomass gasification-dry distillation coupling carbon gas-oil co-production technology |
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| CN103666506A (en) * | 2013-12-13 | 2014-03-26 | 北京蓝天利源科技有限公司 | Feed coal pre-pyrolysis device for large-sized pulverized coal furnace |
| CN203878124U (en) * | 2014-05-19 | 2014-10-15 | 北京蓝天利源科技有限公司 | Combined coal pyrolysis and gasification system |
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