CN1155573A - Process and apparatus for producing hot gas carried on cokes and vapor by fluid bed simultaneously - Google Patents
Process and apparatus for producing hot gas carried on cokes and vapor by fluid bed simultaneously Download PDFInfo
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- CN1155573A CN1155573A CN 96100707 CN96100707A CN1155573A CN 1155573 A CN1155573 A CN 1155573A CN 96100707 CN96100707 CN 96100707 CN 96100707 A CN96100707 A CN 96100707A CN 1155573 A CN1155573 A CN 1155573A
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- gas
- steam
- fluidized
- riser tube
- bed
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- 239000000571 coke Substances 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title abstract description 13
- 239000012530 fluid Substances 0.000 title description 2
- 239000003245 coal Substances 0.000 claims abstract description 35
- 238000002309 gasification Methods 0.000 claims abstract description 31
- 238000005516 engineering process Methods 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 54
- 239000003034 coal gas Substances 0.000 claims description 22
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 230000004888 barrier function Effects 0.000 claims description 10
- 238000005336 cracking Methods 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000003546 flue gas Substances 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000001149 thermolysis Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 230000005587 bubbling Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
Images
Classifications
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
A gas-steam join production technology and its apparatus for producing city gas and synthetic raw gas are disclosed. The apparatus is composed of fluidized bed boiler generating steam and gas generating system, and features that coke is used as heat carrier to provide heat required by thermolysis and gasification of coal. The gas generating system is mainly composed of fluidized bed gasifying reactor, lifting tube, gas-solid separator, valves and pipeline. Not only is the problem that carbon concentration in gasifying reactor is too low solved, ensuring reasonable bed temp and increasing gas outputrate greatly, but also it has the advantages of simple process, low cost and high reliability and stability.
Description
The present invention relates to a kind of technology and device, relate in particular to a kind of circulation bed coal gas-steam co-producing technology and equipment with gas maked coal.
In the prior art, adopting the method for gas maked coal a lot, is exactly use always several as coke oven, upright furnace, two sections stoves of water-gas, pressurization lurgi gasifier etc.Coke-oven gas is the main source of present town gas, and calorific value of gas during it can be produced also is easy to maximize, but its development is subjected to the restriction of coking coal source and coke market.The caloric power of gas that two sections stoves of upright furnace and water-gas produce is low, and gas making efficiency is also low, and this technology has special requirement to coal.The pressurization lurgi gasifier adopts pressure gasification process, and technical difficulty is big, technology and after-treatment system complexity, and therefore investment is big, is difficult to apply.
For overcoming the problems referred to above, China's utility model patent 89213661 adopts the fluidized bed pulverized coal gasification device, promptly earlier coal is carried out cracking in the circulating fluidized bed pyrolyzer, obtain middle calorific value of gas, the semicoke that generates after the coal cracking is sent into the gasifier gasification again and is produced low-heat value gas.This device technique is simple relatively, and gasification intensity is big, and the gas quality of generation is good, but this technology supplies steam and external heat source outside needing, thereby causes structure compact inadequately, the defective that the energy can not make full use of.
For the reasonable use energy, Chinese invention patent 91103896.5 adopts the integrated technique and the equipment of circulation bed coal gas-steam co-producing, and calorific value of gas used for resident living in both can having produced, and can produce steam heating and generating simultaneously.This patent adopts the circular fluid bed with three vortex inner separators to produce steam, and the next-door neighbour arranges that a fluidized bed coal pyrolyzer produces coal gas outside this boiler, employing provides pyrolysis of coal required thermal source through the hot ash that separator separates as thermal barrier, and semicoke that produces behind the pulverized coal pyrolysis and part raw coal are as the fuel of boiler.The sharp equipment of above-mentioned gas-made technology adopts circulating ash as thermal barrier, thereby makes the concentration of the coke in the gasifying reactor very low, is unfavorable for water-gas reaction, so gas yield is low; On the other hand, owing to only separate by separator, so internal circulating load is little, this causes the temperature in the pyrolyzer on the low side as the circulating ash of thermal barrier, and the considerable volatile matter of result will remain in the semicoke, and this has also influenced system gas productive rate.
Chinese patent application (application number 95108875) has proposed a kind of new coal gas-steam co-producing technical scheme, its principal character is that the bottom of boiler furnace is made up of burning bed, heat transfer bed and three fluidized-beds arranged side by side of gasifier bed, and promptly coal gasification reactor is placed in the burner hearth of boiler.Because different wind speed about in the stove has caused the particle internal recycle in the burner hearth.Like this, falling that inner circulation is got off ash and be sent to gasifier bed together as thermal barrier through the material that separator separates is for the coal gasification reaction in the gasifier bed provides heat.Though this technical scheme has solved the not enough problem of the internal circulating load of thermal barrier ash effectively, can guarantee the reasonable reaction temperature in the gasifier bed, the carbon concentration in the gasifier bed is still lower, and this is unfavorable for the water-gas reaction in the gasifier bed.So still there is the low problem of gas yield in this device.
At above-mentioned situation, purpose of the present invention and task provide a kind of fluidized-bed coke carried heat coal gas-steam co-producing technology and device, this technology and device can solve the low excessively problem of concentration of carbon in the gasifying reactor effectively, guarantee rational temperature of reaction in the gasifying reactor, further improve the gas yield of town gas or synthetic raw gas; But also have less investment concurrently, characteristics such as cost is low, and system is reliable.
Purpose of the present invention and task are achieved through the following technical solutions: it comprises fluidized-bed combustion boiler system that produces steam and the gas generating system of producing coal gas, its gas generating system adopts Jiaozhuo thermal barrier, coal is gentleization of cracking in fluidized bed gasification reactor, Jiao who generates enters riser tube burning and heat release, a part is burnt to circulate between riser tube and fluidized bed gasification reactor, and another part Jiao is admitted to the boiler furnace burning.
When this system's production city coal gas or general synthetic raw gas, fluidizing medium in the fluidized bed gasification reactor is the mixture of steam or steam and coal gas, riser tube bottom bubbling air, burnt in riser tube internal combustion and heat release, the hot flue gas that produces in the riser tube is admitted to boiler furnace and burns.
If when producing syngas for synthetic ammonia, fluidizing medium in the fluidized bed gasification reactor is a steam, this moment not only blowing air but also logical steam of riser tube bottom, the promptly burnt intensification of in riser tube, both having burnt, water-gas reaction takes place again, and the gas mixture of generation can be common to the coal gas produced in the fluidized bed gasification reactor and make syngas for synthetic ammonia.
Above-mentioned process unit is achieved in that it mainly is made up of the fluidized-bed combustion boiler of producing steam and the gas generating system of producing coal gas.Gas generating system comprises a fluidized bed gasification reactor and a riser tube, gas-solid separating device is equipped with at the riser tube top, between this device and the fluidized bed gasification reactor communicating valve is housed, the fluidized bed gasification reactor bottom is connected by tremie pipe and variable valve with the riser tube bottom.
When system moves, the coal that is used for producing coal gas directly joins the fluidized bed gasification reactor of being made fluidizing medium by steam or steam and gas mixture, coal is cracking therein, finish the fugitive constituent dispose procedure, simultaneously also with the vapor generation water-gas reaction, the raw gas of generation is flowed out by the gasifying reactor top; And discharge from the fluidized bed gasification reactor bottom with circulation Jiao as thermal barrier through Jiao of cracking and gasification reaction, flow into riser tube through tremie pipe and variable valve.Air that feeds from the riser tube bottom or air and steam mixture are being carried burnt with the certain speed rising, and burning simultaneously, heat release or generation burning and water-gas reaction.A burnt here gas-solid separating device that is heated and is thus lifted to the top.Separated Jiao who gets off is divided into two-way, and wherein a part is returned gasifying reactor, and provides because the cracking and the required heat of gasification reaction of coal to gasifying reactor, and another part then flows to fluidized-bed combustion boiler, as the fuel of boiler.Simultaneously hot flue gas of discharging by the riser tube top or gas mixture then can send into respectively according to the purposes of made coal gas fluidized-bed combustion boiler or with gasifying reactor in the coal gas product that generates mix mutually.
Accompanying drawing 1 is technical process of the present invention and a structural principle synoptic diagram when producing town gas and general synthetic raw gas.
Accompanying drawing 2 is technical process of the present invention and a structural principle synoptic diagram when generating syngas for synthetic ammonia.
Describe principle of work of the present invention in detail below in conjunction with accompanying drawing, concrete structure and embodiment:
The present invention mainly comprises fluidized-bed combustion boiler system that produces steam and the gas generating system of producing coal gas.The boiler systems 1 of producing steam adopts the good fluidized-bed combustion boiler of fuel tolerance, and this boiler should be provided with acceptance from the coke inlet of gas generating system or the inlet of coke and hot flue gas.Gas generating system is mainly by fluidized bed gasification reactor 2, riser tube 3, and gas-solid separating device 4 and corresponding valve and pipeline are formed.Gasifying reactor also should be provided with the import 10 of coal feeding hole 8 and gas exit 9 and fluidizing medium.Need the coal of gasification to enter gasifier 2 by coal feeding hole 8, its bed temperature is controlled at 850 ℃～950 ℃.Its fluidizing medium is looked the coal gas purposes difference of generation and is distinguished to some extent.When production city coal gas, its fluidizing medium 10 should adopt the mixture of steam or steam and coal gas, and when producing synthetic raw gas, only adopts steam to make fluidizing medium and get final product.Jiao that coal cracking and gasification back generate falls into the tremie pipe 7 of gasifying reactor 2 bottoms with circulation Jiao as thermal barrier, and tremie pipe is connected with a L type variable valve 6, the burnt bottom that flows into the riser tube 2 that burns through this valve.
The raw gas that comes out from gasifying reactor is flowed out by the air outlet 9 at gasifier top, is introduced into a cyclonic separator 11, and its entrained solid particle separation is got off, and carries out further clean then.Also can send into boiler combustion by the coke powder that cyclonic separator separates.
The present invention compared with prior art has the following advantages and beneficial effect: the present invention is with general Full gasifying process and the device of coal are compared, and not only technology is simple, and investment and cost are lower, and energy Reasonably utilize the energy; Make the coal gas-steam co-producing technology of heat carrier with circulating ash and compare, because Adopted with Jiaozhuo heat carrier, effectively solved the excessively low problem of concentration of carbon in the gasification reactor, Guarantee enough heat loads and higher reaction temperature, thereby greatly improved gas yield. In addition Outward, in the present invention, boiler in fact only played the hot flue gas that produces in the gas producer and The effect that the part incipient scorch falls, contacting between the boiler of gas generating system and production steam is not tight Close, two parts can work alone, and the boiler capacity of unit gas yield also can reduce relatively. This Just so that this technological process reliability of operation and stability improve greatly, also make gas generating system Dependence to boiler greatly reduces, and has improved the applicability of this technology.
Claims (5)
1, a kind of fluidized-bed coke carried heat coal gas-steam co-producing technology, comprise the boiler systems of producing the steam fluidized-bed and the gas generating system of producing coal gas, it is characterized in that gas generating system adopts with Jiaozhuo thermal barrier, coal is gentleization of cracking in fluidized bed gasification reactor 2, Jiao who generates enters riser tube 3 burning and heat releases, a part is burnt to circulate between riser tube and fluidized bed gasification reactor, and another part Jiao is admitted to the boiler furnace burning.
2, according to the described fluidized-bed coke carried heat of claim 1 coal gas-steam co-producing technology, it is characterized in that the interior fluidizing medium of fluidized bed gasification reactor adopts the mixture riser tube bottom blowing air of steam or steam and coal gas, the hot flue gas that riser tube produces is admitted to the boiler furnace burning.
3, according to the described fluidized-bed coke carried heat of claim 1 coal gas-steam co-producing technology, it is characterized in that the fluidizing medium in the fluidized bed gasification reactor adopts steam, riser tube bottom not only blowing air but also logical steam, the gas mixture that generates in the riser tube mixes with the interior coal gas product that generates of fluidized bed gasification reactor.
4, a kind of fluidized-bed coke carried heat coal gas-steam co-producing device, mainly form by the gas generating system of the fluidized-bed combustion boiler 1 of producing steam and production coal gas, it is characterized in that gas generating system comprises a fluidized bed gasification reactor 2 and a riser tube 3, gas-solid separating device 4 is equipped with at the riser tube top, communicating valve 5 is housed between this device and the gasifying reactor, and the gasifying reactor bottom is connected by tremie pipe 7 and variable valve 6 with the riser tube bottom.
5, according to the described fluidized-bed coke carried heat coal gas of claim 4-steam co-producing device, the fluidized-bed combustion boiler that it is characterized in that producing steam is provided with hot flue gas and the coke inlet from gas-solid separating device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96100707 CN1155573A (en) | 1996-01-26 | 1996-01-26 | Process and apparatus for producing hot gas carried on cokes and vapor by fluid bed simultaneously |
| CN96109833A CN1057788C (en) | 1996-01-26 | 1996-09-20 | Tech. and equipment for union prodn. of gas and steam by fluidized bed and coke heat carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96100707 CN1155573A (en) | 1996-01-26 | 1996-01-26 | Process and apparatus for producing hot gas carried on cokes and vapor by fluid bed simultaneously |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1155573A true CN1155573A (en) | 1997-07-30 |
Family
ID=5116681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96100707 Pending CN1155573A (en) | 1996-01-26 | 1996-01-26 | Process and apparatus for producing hot gas carried on cokes and vapor by fluid bed simultaneously |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1155573A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318796C (en) * | 2004-07-26 | 2007-05-30 | 中国科学院工程热物理研究所 | Method for producing both gas and steam, and boiler of circulating fluid bed with pyrolysis vaporizer |
| CN100340644C (en) * | 2004-06-17 | 2007-10-03 | 中国科学院工程热物理研究所 | Solid fuel gasification reaction unit |
| CN100352897C (en) * | 2003-01-22 | 2007-12-05 | 中国科学院工程热物理研究所 | Response operator for gasifying solid fuels |
-
1996
- 1996-01-26 CN CN 96100707 patent/CN1155573A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352897C (en) * | 2003-01-22 | 2007-12-05 | 中国科学院工程热物理研究所 | Response operator for gasifying solid fuels |
| CN100340644C (en) * | 2004-06-17 | 2007-10-03 | 中国科学院工程热物理研究所 | Solid fuel gasification reaction unit |
| CN1318796C (en) * | 2004-07-26 | 2007-05-30 | 中国科学院工程热物理研究所 | Method for producing both gas and steam, and boiler of circulating fluid bed with pyrolysis vaporizer |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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| C03 | Withdrawal of patent application (patent law 1993) |