CN205653416U - Low circulation ratio living beings circulating fluidized bed gasifier of directional coal fired boiler refueling - Google Patents
Low circulation ratio living beings circulating fluidized bed gasifier of directional coal fired boiler refueling Download PDFInfo
- Publication number
- CN205653416U CN205653416U CN201620497133.9U CN201620497133U CN205653416U CN 205653416 U CN205653416 U CN 205653416U CN 201620497133 U CN201620497133 U CN 201620497133U CN 205653416 U CN205653416 U CN 205653416U
- Authority
- CN
- China
- Prior art keywords
- gasifier
- living beings
- gasification furnace
- fired boiler
- biomass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003245 coal Substances 0.000 title abstract description 4
- 238000002309 gasification Methods 0.000 claims abstract description 41
- 239000002028 Biomass Substances 0.000 claims abstract description 38
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000009826 distribution Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 239000004449 solid propellant Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 239000000428 dust Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000446 fuel Substances 0.000 abstract description 3
- 239000002245 particle Substances 0.000 abstract description 3
- 230000035484 reaction time Effects 0.000 abstract description 3
- 206010037660 Pyrexia Diseases 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- -1 branches Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model relates to a low circulation ratio living beings circulating fluidized bed gasifier of directional coal fired boiler refueling, including gasifier, charging means, one -level circulation separator and returning charge ware. The interval arrangement has the overgrate air spout around the upside of gasifier. Spout into the overgrate air in to the gasifier through the overgrate air spout, improved the gasification temperature in the gasifier, increased the reaction time of biomass fuel in the gasifier. Further guaranteed through one -level circulation separator and returning charge ware that improving energy efficiency is not further reacted to the high -temperature region of the big particle diameter material entering gasifier of complete reaction. The energy that makes living beings solid fuel is many as far as possible transfers to the living beings gas, and heat conversion reaches more than 90%. The living beings gas that one -level circulation separator came out gets into the grade separation ware and further removes dust, guarantees that the living beings gas air current of directional refueling does not contain biomass ash, and the burning produces negative effects to coal fired boiler to avoid biomass ash at the refueling in -process.
Description
Technical Field
The utility model belongs to the technical field of biomass gasification equipment, in particular to low circulation ratio living beings circulating fluidized bed gasifier that directional coal fired boiler reburns.
Background
The biomass gasification is to convert biomass raw materials into CO and CH4、H2The biomass fuel gas has high utilization efficiency and wide application, and can be used as domestic gas, a boiler or power generation. The biomass gasification furnace is one of important technologies for biomass energy utilization, and is used for gasifying agricultural and forestry wastes, such as straw and rice husk, branches, wood chips, weeds and the like, serving as raw materials to obtain combustible gas.
The circulating fluidized bed gasification furnace has high fluidizing speed, and the reaction temperature in the furnace is generally controlled to be 700-900 ℃. The method is characterized in that: the running fluidization speed is high and is about 3-4 times of the terminal speed of the particles; the gasification air quantity is only 20% -30% of the combustion air quantity; in order to keep the diameter of the fluidized high-speed bed body generally smaller; the method is suitable for various raw materials, and the content of tar in the generated gas is low; high gas production rate per unit and high production capacity per unit volume. The furnace type is suitable for large-scale application places, and has good technical content and commercial competitiveness. However, the conversion rate and the thermal efficiency of the biomass solid fuel of the existing circulating fluidized bed gasification furnace are low, and meanwhile, the biomass gas contains a large amount of biomass ash, so that the combustion of a coal-fired boiler is negatively influenced in the reburning process.
SUMMERY OF THE UTILITY MODEL
The utility model provides a biomass circulating fluidized bed gasification furnace with low circulating multiplying power for reburning of a directional coal-fired boiler, which is not enough for the prior art.
A biomass circulating fluidized bed gasification furnace with low circulation ratio for reburning of a directional coal-fired boiler comprises a gasification furnace 3, a feeder, a primary circulation separator 6 and a material returning device, wherein secondary air nozzles 4 are arranged at the periphery of the upper side of the gasification furnace 3 at intervals; an air distribution plate 5 is arranged at the bottom of the gasification furnace 3; an outlet at the upper part of the first-stage circulating separator 6 is connected with an inlet of the second-stage separator 7, and the lower side of the second-stage separator 7 is connected with an ash bin 9.
The material returning device is connected to the high-temperature area of the gasification furnace 3.
The first-stage circulating separator 6 and the second-stage separator 7 both adopt cyclone separators.
The utility model has the advantages that:
the utility model has simple structure, the secondary air is sprayed into the gasification furnace through the secondary air nozzle, the gasification temperature in the gasification furnace is improved, and the reaction time of the biomass fuel in the gasification furnace is increased; the primary circulation separator and the material returning device further ensure that incompletely-reacted large-particle-size materials enter a high-temperature region of the gasification furnace for further reaction, so that the energy of the biomass solid fuel is transferred to biomass gas as much as possible, the heat conversion rate reaches over 90 percent, and the energy utilization rate is improved. The secondary separator plays a role in gas dust removal, biomass gas airflow subjected to directional reburning is guaranteed not to contain biomass ash, and negative effects of the biomass ash on combustion of the coal-fired boiler are avoided in the reburning process.
Drawings
FIG. 1 is a schematic structural diagram of a biomass circulating fluidized bed gasifier with low circulation ratio for reburning of a directional coal-fired boiler;
description of reference numerals: 1-hopper, 2-feeder, 3-gasification furnace, 4-secondary air nozzle, 5-air distribution plate, 6-primary circulation separator, 7-secondary separator, 8-material returning device and 9-ash bin.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the following detailed description. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
As shown in figure 1, the biomass circulating fluidized bed gasification furnace with low circulating ratio for reburning of the directional coal-fired boiler is characterized in that a gasification furnace 3 is connected with a feeder 2, and a hopper 1 is arranged above the feeder 2. An inlet above the primary circulation separator 6 is connected with an outlet of the gasification furnace, an outlet at the lower side is connected with a material returning device 8, and the material returning device 8 is communicated to a high-temperature area of the gasification furnace 3 through a pipeline. Secondary air nozzles 4 are arranged at intervals on the periphery of the upper side of the gasification furnace 3; an air distribution plate 5 is arranged at the bottom of the gasification furnace 3.
An outlet at the upper part of the first-stage circulating separator 6 is connected with an inlet of the second-stage separator 7, and the lower side of the second-stage separator 7 is connected with an ash bin 9. Wherein, the first-stage circulating separator 6 and the second-stage separator 7 both adopt cyclone separators.
The working principle of the utility model is as follows:
the gasification furnace 3 converts the biomass solid fuel into biomass gas which is used as the reburning of the coal-fired boiler, and the air distribution plate 5 distributes air to promote the conversion of the biomass solid fuel; the secondary air nozzle 4 sprays secondary air into the gasification furnace, so that air is improvedThe gasification temperature in the gasification furnace 3 and the reaction time of the biomass fuel in the gasification furnace 3 are increased; the first-stage circulation separator 6 separates biomass fuel gas and particles, and the incompletely-reacted large-particle-size material enters a high-temperature region of the gasification furnace 3 for circulation reaction; controlling the circulating material quantity in the gasification furnace 3 to control the circulating multiplying power of the gasification furnace 3 to be 1-10; wherein,the device obviously improves the conversion efficiency of the biomass solid fuel, the heat conversion rate of the biomass solid fuel reaches more than 90 percent, and the energy utilization rate is improved. The biomass gas enters the secondary separator 7 for further dust removal, so that the biomass gas flow subjected to directional reburning does not contain biomass ash, the biomass ash is prevented from generating negative effects on the combustion of the coal-fired boiler in the reburning process, and the biomass ash is collected by the ash bin 9 for centralized treatment.
Claims (3)
1. The biomass circulating fluidized bed gasification furnace with low circulating ratio for reburning of the directional coal-fired boiler comprises a gasification furnace (3), a feeder, a primary circulating separator (6) and a material returning device, and is characterized in that secondary air nozzles (4) are arranged at intervals on the periphery of the upper side of the gasification furnace (3); an air distribution plate (5) is arranged at the bottom of the gasification furnace (3); an outlet at the upper part of the primary circulating separator (6) is connected with an inlet of the secondary separator (7), and the lower side of the secondary separator (7) is connected with an ash bin (9).
2. The biomass circulating fluidized bed gasification furnace with low circulation ratio for directional coal-fired boiler reburning as claimed in claim 1, wherein the material returning device is connected to the high temperature zone of the gasification furnace (3).
3. The biomass circulating fluidized bed gasification furnace with low circulation ratio for the reburning of the directional coal-fired boiler according to claim 1, wherein the primary circulating separator (6) and the secondary separator (7) both adopt cyclone separators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620497133.9U CN205653416U (en) | 2016-05-26 | 2016-05-26 | Low circulation ratio living beings circulating fluidized bed gasifier of directional coal fired boiler refueling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620497133.9U CN205653416U (en) | 2016-05-26 | 2016-05-26 | Low circulation ratio living beings circulating fluidized bed gasifier of directional coal fired boiler refueling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205653416U true CN205653416U (en) | 2016-10-19 |
Family
ID=57404515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620497133.9U Expired - Fee Related CN205653416U (en) | 2016-05-26 | 2016-05-26 | Low circulation ratio living beings circulating fluidized bed gasifier of directional coal fired boiler refueling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205653416U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106929108A (en) * | 2017-04-19 | 2017-07-07 | 中国华能集团清洁能源技术研究院有限公司 | A kind of biomass and city solid waste comprehensive utilization device and method |
| CN109082306A (en) * | 2018-08-02 | 2018-12-25 | 哈尔滨工业大学 | The device and method of gasification of biomass coupling coal fired power generation co-producing bio matter charcoal |
-
2016
- 2016-05-26 CN CN201620497133.9U patent/CN205653416U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106929108A (en) * | 2017-04-19 | 2017-07-07 | 中国华能集团清洁能源技术研究院有限公司 | A kind of biomass and city solid waste comprehensive utilization device and method |
| CN109082306A (en) * | 2018-08-02 | 2018-12-25 | 哈尔滨工业大学 | The device and method of gasification of biomass coupling coal fired power generation co-producing bio matter charcoal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161019 Termination date: 20190526 |