CN201047595Y - Biomass fluidized-bed combustion device - Google Patents
Biomass fluidized-bed combustion device Download PDFInfo
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- CN201047595Y CN201047595Y CNU2007200374128U CN200720037412U CN201047595Y CN 201047595 Y CN201047595 Y CN 201047595Y CN U2007200374128 U CNU2007200374128 U CN U2007200374128U CN 200720037412 U CN200720037412 U CN 200720037412U CN 201047595 Y CN201047595 Y CN 201047595Y
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Abstract
The utility model discloses a biological substance fluidized bed combustion device, comprising a combustion reactor provided with at least an air intake and an off-gas outlet, and a pyrogenation gasification reactor. The pyrogenation gasification reactor is connected with the combustion reactor through a pyrogenation gas connecting pipe and a material-return connecting pipe, and the pyrogenation gas connecting pipe has an access to the upper and middle parts of the combustion reactor, and the material-return connecting pipe has an access to the lower part of the combustion reactor. And a gas feeding inlet and a material feeding inlet are also arranged on the pyrogenation gasification reactor. The combustion device of the utility model is characterized in that the combustion is high effective; the combustion process can effectively restrain alkali metals corrosion, etc.
Description
Technical field
The utility model relates to a kind of device of biomass combustion, the burning device of circulating fluidized bed of alkali metal etching problem in particularly a kind of effective inhibition biomass combustion process.
Background technology
China has abundant biomass resource; and fossil energy is in short supply, and 21 century will be faced with the dual-pressure of economic growth and environmental protection again, therefore develops the biomass energy burning and utilizes technology; to setting up continuable energy resource system, promote that development and national economy and environmental protection are significant.
In recent years along with the biomass combustion gasifying electricity generation is used increasingly extensive, fluidization is one of biomass efficient burning major technique approach, but biomass fluid bed combustion technology has also run into variety of issue in using, increase as heat loss due to unburned carbon, ash fusion point is low to produce grey reunion, slagging scorification and deposition, and biomass combustion causes that the problems such as alkali metal corrosion of hardware are more and more outstanding.Although try to explore to solve problems such as alkali metal deposition in the biomass combustion process, corrosion both at home and abroad, propose some and alleviated the method for alkali problem, comprise and use additive, select to remove alkali metal before suitable bed material, the burning, boiler is optimized design, adjustment combustion conditions etc., adapt to the effective ways of deposition, etching problem in the different biomass combustion processes but achieve a solution yet, long-term stability, the safe operation of commercial applying biological matter combustion power generation equipment brought very big difficulty.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and the burning device of circulating fluidized bed that can effectively suppress the alkali metal etching problem in a kind of biomass efficient burning and the combustion process is provided.
For achieving the above object, the utility model adopts following technical scheme, it comprises that one is provided with the combustion reactor of at least one air inlet and an exhanst gas outlet, it also comprises a pyrolytic gasification reactor, described pyrolytic gasification reactor links to each other with combustion reactor with the returning charge tube connector by the pyrolysis gas tube connector, the pyrolysis gas tube connector feeds the dilute phase combustion zone at combustion reactor top or middle part, the returning charge tube connector feeds the close phase combustion zone of combustion reactor bottom, also is provided with an air inlet and a charge door on the described pyrolytic gasification reactor.The pyrolytic gasification reaction takes place in living beings in the pyrolytic gasification reactor, the semicoke of generation and pyrolysis gas enter combustion reactor and finish combustion process, thereby the pyrolytic gasification and the burning of living beings separated, and has efficiently the purpose of safe combustion.
In order to make full use of the high-temperature ash in combustion reactor, described exhanst gas outlet links to each other with a cyclone separator, high-temperature ash is served as heat carrier in the lower end of cyclone separator is connected to the pyrolytic gasification reactor, be provided with an exhanst gas outlet on the top of cyclone separator.
In order to reduce the discharging of nitrogen oxide, the air inlet of described combustion reactor is two, a bottom that is arranged on combustion reactor, and gas feeds the close phase combustion zone of combustion reactor thus; A middle part or a top that is arranged on combustion reactor, gas feeds the dilute phase combustion zone of combustion reactor thus.
The exhanst gas outlet of described cyclone separator links to each other with the air inlet of pyrolysis reactor.
Beneficial effect: 1, adopt pyrolytic gasification reactor and the combined burner of combustion reactor, the pyrolytic gasification and the burning of living beings are separated, the reaction of living beings generation pyrolytic gasification generates living beings semicoke and pyrolysis gas, then living beings semicoke and the pyrolysis gas that generates is fed burning again in the combustion reactor, finish combustion process, increase the time of staying of living beings in stove, reduced imperfect combustion loss, improved efficiency of combustion; 2, connect cyclone separator at the combustion reactor exhanst gas outlet, the flue gas that carries the solid lime-ash that combustion reactor is produced carries out gas solid separation and becomes solid lime-ash and flue gas, and the solid lime-ash feeds the pyrolytic gasification reactor as heat carrier, and is recycling; 3, combustion method of the present utility model is introduced into the pyrolysis gas of living beings the top or the middle part of combustion reactor by pyrolysis reactor, contain a large amount of reducibility gas such as carbon monoxide, hydrogen etc. in the pyrolysis gas, while helps reducing the discharging of nitrogen oxide in conjunction with the adjustment of two air inlet primary and secondary air proportionings of combustion reactor; 4, it is wide that the utility model also has its combustion adaptive, not only can use each biolobic material to comprise agriculture and forestry organic waste materials such as stalk, rice husk, shell, branch, also can realize the multifuel combustion of coal and living beings.
Description of drawings
Fig. 1 is the utility model device schematic diagram
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated, as shown in Figure 1, it comprises combustion reactor 1, bottom at combustion reactor 1, last middle part respectively is provided with an air inlet A and a B, the top of combustion reactor links to each other with cyclone separator 2, the top of cyclone separator 2 is provided with exhanst gas outlet C, the lower end D of cyclone separator 2 feeds in the pyrolytic gasification reactor 3, pyrolytic gasification reactor 3 also is provided with four mouths, be respectively air inlet F, charge door E and the returning charge tube connector G that links to each other with combustion reactor 1 and pyrolysis gas tube connector H, returning charge tube connector G leads to the close phase combustion zone of the bottom of combustion reactor 1, and pyrolysis gas tube connector H leads to the dilute phase combustion zone on combustion reactor 1 middle part or top.
During burning, at first by charge door E with living beings and calcium based compound and or additive such as kaolin send into pyrolytic gasification reactor 3, air inlet F passes to fluidizing agent, and living beings and additive the pyrolytic gasification reaction take place in pyrolytic gasification reactor 3 generate semicoke and pyrolysis gas; Secondly reacted living beings semicoke is entered the close phase combustion zone of combustion reactor 1 by returning charge tube connector G, pyrolysis gas is introduced into fully burning in the dilute phase combustion zone of combustion reactor by pyrolysis gas tube connector H, the calcium based compound can be selected calcium oxide for use, in calcium hydroxide or the calcium carbonate one or more, the flue gas that carries the solid lime-ash that burning produces in the combustion reactor 1 becomes flue gas and solid lime-ash through cyclone separator 2 gas solid separation, flue gas is sent by gas outlet C, the circulation of the partial fume of gas outlet C passes to the air inlet F of pyrolytic gasification reactor 3, and the high-temperature ash of separating is sent into pyrolytic gasification reactor 3 and served as heat carrier and recycle.
In course of reaction, pyrolytic gasification reactor reaction temperature is 400-800 ℃, and the reaction temperature 600-950 of combustion reactor ℃, best reaction temperature is a pyrolytic gasification reactor reaction temperature: 500-750 ℃, and the reaction temperature 750-900 of combustion reactor ℃.
In the pyrolytic gasification reactor, add additives such as calcium based compound and kaolin, calcium based compound calcium oxide, calcium hydroxide or calcium carbonate etc. can generate calcium sulfide and calcium chloride with it with sulphur and the chlorine reaction in the living beings through calcium oxide that combustion reactor calcining generates, and play to absorb and remove the sulphur in the living beings and the effect of chlorine; Kaolin in this external additive etc. react with the alkali metal chloride and the sulfate of living beings, generate dystectic alumino-silicate such as potassium aluminosilicate, sodium silicoaluminate, produce thereby suppress low melting point alkali metal lime-ash and gas phase alkali metal chloride such as potassium chloride and sodium chloride, realize the effect of the solid chlorine of desulfurization; Living beings semicoke that generates behind the pyrolytic gasification and lime-ash comprise that calcium sulfide, calcium chloride, potassium aluminosilicate, sodium silicoaluminate etc. are entered the close phase combustion zone of combustion reactor bottom by tube connector, calcium sulfide is converted into calcium sulfate under oxidizing atmosphere, because can not directly reacting with oxygen, calcium chloride discharges chlorine, and the living beings sulfur content is low, and contain calcium oxide in the bed material, sulfur curable in the living beings is a calcium sulfate, thereby when removing sulfur dioxide, suppressed the release of chlorine under the sulfur dioxide condition; Alkali metal mainly exists with dystectic alumino-silicate such as potassium aluminosilicate, sodium silicoaluminate form in the CFBC reactor in addition, thereby can solve the problem of biomass combustion alkali metal deposition, corrosion under the oxidizing atmosphere.
Claims (4)
1. biomass fluid bed combustion device, comprise that one is provided with the combustion reactor (1) of at least one air inlet and an exhanst gas outlet, it is characterized in that it also comprises a pyrolytic gasification reactor (3), described pyrolytic gasification reactor (3) links to each other with combustion reactor (I) with returning charge tube connector (G) by pyrolysis gas tube connector (H), pyrolysis gas tube connector (H) feeds the dilute phase combustion zone at combustion reactor (1) top or middle part, returning charge tube connector (G) feeds the close phase combustion zone of combustion reactor (1) bottom, also is provided with an air inlet (F) and a charge door (E) on the described pyrolytic gasification reactor (3).
2. biomass fluid bed combustion device according to claim 1, it is characterized in that described exhanst gas outlet links to each other with a cyclone separator (2), the lower end of described cyclone separator (2) is connected in the pyrolytic gasification reactor (3), is provided with an exhanst gas outlet (C) on the top of cyclone separator (2).
3. biomass fluid bed combustion device according to claim 1 and 2, the air inlet that it is characterized in that described combustion reactor is two, (A) who is arranged on combustion reactor (1) bottom, gas feeds the close phase combustion zone of combustion reactor (1) thus; (B) who is arranged on combustion reactor (1) middle part or top, gas feeds the dilute phase combustion zone of combustion reactor (1) thus.
4. biomass fluid bed combustion device according to claim 1 and 2 is characterized in that the exhanst gas outlet (c) of described cyclone separator (2) links to each other with the air inlet (F) of pyrolytic gasification reactor (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200374128U CN201047595Y (en) | 2007-05-15 | 2007-05-15 | Biomass fluidized-bed combustion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200374128U CN201047595Y (en) | 2007-05-15 | 2007-05-15 | Biomass fluidized-bed combustion device |
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| Publication Number | Publication Date |
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| CN201047595Y true CN201047595Y (en) | 2008-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007200374128U Expired - Fee Related CN201047595Y (en) | 2007-05-15 | 2007-05-15 | Biomass fluidized-bed combustion device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102186953A (en) * | 2008-08-20 | 2011-09-14 | 株式会社Ihi | Fuel gasification equipment |
| CN102816621A (en) * | 2012-09-19 | 2012-12-12 | 中国科学院广州能源研究所 | Method for preparing briquette fuels by waste woods in furniture factory |
| CN104879745A (en) * | 2015-05-13 | 2015-09-02 | 广州环渝能源科技有限公司 | Method and system of realizing carbon emission reduction by gasifier |
-
2007
- 2007-05-15 CN CNU2007200374128U patent/CN201047595Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102186953A (en) * | 2008-08-20 | 2011-09-14 | 株式会社Ihi | Fuel gasification equipment |
| CN102816621A (en) * | 2012-09-19 | 2012-12-12 | 中国科学院广州能源研究所 | Method for preparing briquette fuels by waste woods in furniture factory |
| CN104879745A (en) * | 2015-05-13 | 2015-09-02 | 广州环渝能源科技有限公司 | Method and system of realizing carbon emission reduction by gasifier |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080416 Termination date: 20110515 |