CN215765014U - Bundled biomass pre-combustion gas coupling coal-fired unit power generation system - Google Patents
Bundled biomass pre-combustion gas coupling coal-fired unit power generation system Download PDFInfo
- Publication number
- CN215765014U CN215765014U CN202121565787.8U CN202121565787U CN215765014U CN 215765014 U CN215765014 U CN 215765014U CN 202121565787 U CN202121565787 U CN 202121565787U CN 215765014 U CN215765014 U CN 215765014U
- Authority
- CN
- China
- Prior art keywords
- biomass
- combustion chamber
- combustion
- power generation
- chamber
- 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.)
- Active
Links
Images
Landscapes
- Solid-Fuel Combustion (AREA)
Abstract
The utility model belongs to the technical field of biomass gasification power generation, and particularly relates to a bundled biomass pre-combustion gas coupled coal-fired unit power generation system which comprises a pre-combustion chamber and a main boiler combustion chamber communicated with the pre-combustion chamber, wherein the pre-combustion chamber is provided with a feeding channel, a grate is also arranged in the pre-combustion chamber, a combustion layer is arranged above the grate, a secondary air channel is arranged below the grate, and a hot air inserting plate door is arranged in the secondary air channel; the precombustion chamber is connected with a feeding system through a feeding channel, the feeding system comprises a fuel tank and a hydraulic pushing mechanism, and the hydraulic pushing mechanism is used for pushing bundles of biomass in the fuel tank into the precombustion chamber through the feeding channel. The utility model adopts the fire grate type heat insulation precombustion chamber, does not design an induced draft fan and a blower, does not design a heating surface, directly sucks hot gas after precombustion into a boiler of a coal-fired power plant through the negative pressure of a hearth, generates power by coupling the hot gas with the boiler, and has simple manufacturing process and low cost.
Description
Technical Field
The utility model belongs to the technical field of biomass gasification power generation, and particularly relates to a power generation system of a bundled biomass pre-combustion gas coupled coal-fired unit.
Background
CO emitted during biomass combustion2Is the CO absorbed by it during its growth2Biomass combustion power generation can therefore be considered "zero carbon" emissions power generation. The coal-fired unit is an important means for carbon emission reduction by blending the biomass for power generation, and the price advantage of the biomass energy also provides possibility for reducing the fuel cost of the coal-fired unit. Compared with the domestic small biomass unit power generation mode, the advantages of co-combustion of biomass by using the high-parameter high-capacity coal-fired unit are obvious: the fixed investment is small, and the unit power generation cost is reduced; the biomass energy utilization efficiency and the energy-saving effect of the whole society are obvious; can realize the ultralow emission of the flue gas. Compared with the modes of electricity generation, small-scale heat supply, household cooking and the like of a newly-built small unit, the biomass mixed burning of the coal-fired unit not only has remarkable energy-saving benefit, but also fundamentally solves the problem that farmers burn a large amount of biomass when the coal-fired unit consumes the biomassThe waste straw causes serious pollution to the environment, plays an important role in improving the ecological environment and has important significance in promoting the development of local economy and the harmony and stability of society. At present, the coupling power generation of biomass and coal has the following main technical schemes:
(1) one is that after being directly mixed with coal, the biomass is used as fuel and sent into a coal-fired boiler for combustion through a pulverizing system. The scheme is applied in many foreign countries, the raw material is mainly wood biomass, and the scheme has the problems that the raw material adaptability is poor, and the biomass is directly combusted in the furnace to cause the hidden trouble of corroding the heating surface of the coal burning boiler.
(2) And secondly, biomass is directly combusted in the boiler to generate steam, and the steam is coupled with the steam system of the existing power plant to generate power, the scheme needs to be newly built with a small-sized high-parameter coal-fired boiler to match with a large-sized boiler, the investment cost is high, the system is complex, and the application is not available at home.
(3) And thirdly, gasification coupling power generation is carried out, biomass is gasified through a gasification furnace, and the generated combustible gas is sent to a coal-fired boiler for combustion.
(4) After the biomass is combusted in the boiler, the flue gas is fed into the coal-fired boiler through the draught fan and coupled with the flue gas of the coal-fired boiler, and the draught fan is adopted in the scheme, so that the use temperature of the draught fan is limited, a flue gas cooling device is required, the system is complex, the flue gas quality is low, and the influence on the coal-fired boiler is large.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power generation system of a bundled biomass pre-combustion gas coupled coal-fired unit, and aims to generate power by coupling hot gas generated by biomass combustion gasification with a coal-fired boiler.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a power generation system of a bundled biomass pre-combustion gas coupled coal-fired unit comprises a pre-combustion chamber and a main boiler combustion chamber communicated with the pre-combustion chamber, wherein the pre-combustion chamber is provided with a feeding channel, a grate is also arranged in the pre-combustion chamber, a combustion layer is arranged above the grate, a secondary air channel is arranged below the grate, and a hot air inserting plate door is arranged in the secondary air channel;
the precombustion chamber is connected with a feeding system through a feeding channel, the feeding system comprises a fuel tank and a hydraulic pushing mechanism, and the hydraulic pushing mechanism is used for pushing bundles of biomass in the fuel tank into the precombustion chamber through the feeding channel.
Furthermore, the bottom of the precombustion chamber is also provided with a slag falling pipe, the precombustion chamber is connected with the roller slag cooler through the slag falling pipe, and the slag falling pipe is provided with a slag falling inserting plate door.
Furthermore, the feeding channel is respectively provided with a reducing section, a sealing section and a gradually expanding section, and a feeding isolation door is arranged in the sealing section.
Furthermore, the pre-combustion chamber is connected with the combustion chamber of the main boiler through a flue gas channel, and a combustor and a cold slag hopper are arranged in the combustion chamber of the main boiler.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model is provided with a precombustion chamber, the precombustion chamber is connected with a combustion chamber of a main boiler through a flue gas channel, a fire grate is also arranged in the precombustion chamber, a combustion layer is arranged above the fire grate, a secondary air channel is arranged below the fire grate, and a hot air inserting plate door is arranged in the secondary air channel; the precombustion chamber is connected with a feeding system through a feeding channel, the feeding system comprises a fuel tank and a hydraulic pushing mechanism, and the hydraulic pushing mechanism is used for pushing bundles of biomass in the fuel tank into the precombustion chamber through the feeding channel. The precombustion chamber is not provided with an induced draft fan and a blower, does not relate to a heating surface, hot combustion gas after precombustion is directly conveyed to a coal-fired boiler through a flue gas channel by virtue of furnace bottom negative pressure, the manufacturing process is simple, the cost is low, and CO discharged during biomass combustion2Is the CO absorbed by it during its growth2And the biomass ash after pre-burning enters the roller slag cooler through the slag falling pipe to be applied in a fertilizer mode, and is directly returned to the field, so that negative emission of carbon is realized, and higher environmental protection requirements can be met.
The utility model adopts the fuel tank to store bundled biomass, the biomass passes through the reducing section, the sealing section and the gradually expanding section of the feeding channel, and is compressed to be diffused without unpacking, thereby reducing the operation process. The falling slag inserting plate door, the feeding isolation door and the hot air inserting plate door control the falling slag, the biomass and the hot air to enter, and the effect of sealing the pre-combustion chamber is achieved when the door is closed simultaneously, so that the temperature of the pre-combustion chamber can be increased.
Drawings
FIG. 1 is a schematic structural diagram of a power generation system of a bundled biomass pre-combustion gas coupled coal-fired unit.
Wherein: 1-a combustion layer; 2-a grate; 3-a slag falling pipe; 4-a slag-falling inserting plate door; 5-roller slag cooler; 6-a burner; 7-a cold slag hopper; 8-a feed isolation gate; 9-fuel tank; 10-hydraulic pushing mechanism; 11-hot air inserting plate door.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figure 1, the power generation system of the bundled biomass pre-combustion gas coupled coal-fired unit comprises a pre-combustion chamber and a main boiler combustion chamber communicated with the pre-combustion chamber, wherein the pre-combustion chamber is connected with the main boiler combustion chamber through a flue gas channel, and a combustor 6 and a cold slag hopper 7 are arranged in the main boiler combustion chamber.
The pre-combustion chamber is provided with a feeding channel, a fire grate 2 is further arranged in the pre-combustion chamber, a combustion layer 1 is arranged above the fire grate 2, a secondary air channel is arranged below the fire grate, a hot air inserting plate door 11 is arranged in the secondary air channel, a slag falling pipe 3 is further arranged at the bottom of the pre-combustion chamber, the pre-combustion chamber is connected with a roller slag cooler 5 through the slag falling pipe 3, and a slag falling inserting plate door 4 is arranged on the slag falling pipe.
The precombustion chamber is connected with a feeding system through a feeding channel, the feeding system comprises a fuel tank 9 and a hydraulic pushing mechanism 10, and the hydraulic pushing mechanism 10 is used for pushing bundles of biomass in the fuel tank 9 into the precombustion chamber through the feeding channel. The feed passage is respectively provided with a reducing section, a sealing section and a gradually expanding section, and a feed isolation door 8 is arranged in the sealing section.
When the device is used, the bundled biomass is pushed in through the hydraulic pushing mechanism 10 and is conveyed into the precombustion chamber through the feeding channel, the bundled biomass sequentially passes through the reducing section and the sealing section in the feeding channel and is compressed, partial moisture in the fuel is dried in the gradually expanding section by means of radiant heat in the precombustion chamber, then the biomass falls into the combustion layer and is gradually unpacked, quick pyrolysis, gasification and combustion are carried out through secondary hot air to generate fuel gas with a certain heat value, the generated hot fuel gas is conveyed to the combustion chamber of the main boiler through a pipeline to be mixed with pulverized coal by utilizing negative pressure at the bottom of the coal-fired boiler, and the coal-fired unit is utilized for power generation. The ash and slag generated after combustion fall into the roller slag cooler 5 through the slag falling pipe 3 for fertilizer application, and zero emission of carbon is realized.
The preferred embodiments of the utility model disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the utility model to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims (4)
1. A bundled biomass pre-combustion gas coupled coal-fired unit power generation system is characterized in that: the boiler comprises a precombustion chamber and a main boiler combustion chamber communicated with the precombustion chamber, wherein the precombustion chamber is provided with a feeding channel, a grate (2) is also arranged in the precombustion chamber, a combustion layer (1) is arranged above the grate (2), a secondary air channel is arranged below the grate (2), and a hot air inserting plate door (11) is arranged in the secondary air channel;
the pre-combustion chamber is connected with a feeding system through a feeding channel, the feeding system comprises a fuel tank (9) and a hydraulic pushing mechanism (10), and the hydraulic pushing mechanism (10) is used for pushing bundles of biomass in the fuel tank (9) into the pre-combustion chamber through the feeding channel.
2. The biomass bale pre-combustion gas coupled coal-fired unit power generation system of claim 1, wherein: the bottom of the precombustion chamber is also provided with a slag falling pipe (3), the precombustion chamber is connected with a roller slag cooler (5) through the slag falling pipe (3), and the slag falling pipe is provided with a slag falling inserting plate door (4).
3. The biomass bale pre-combustion gas coupled coal-fired unit power generation system of claim 2, wherein: the feeding channel is respectively provided with a reducing section, a sealing section and a gradually expanding section, and a feeding isolation door (8) is arranged in the sealing section.
4. The biomass bale pre-combustion gas coupled coal-fired unit power generation system of claim 3, wherein: the pre-combustion chamber is connected with the combustion chamber of the main boiler through a flue gas channel, and a combustor (6) and a cold slag bucket (7) are arranged in the combustion chamber of the main boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121565787.8U CN215765014U (en) | 2021-07-09 | 2021-07-09 | Bundled biomass pre-combustion gas coupling coal-fired unit power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121565787.8U CN215765014U (en) | 2021-07-09 | 2021-07-09 | Bundled biomass pre-combustion gas coupling coal-fired unit power generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215765014U true CN215765014U (en) | 2022-02-08 |
Family
ID=80104746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121565787.8U Active CN215765014U (en) | 2021-07-09 | 2021-07-09 | Bundled biomass pre-combustion gas coupling coal-fired unit power generation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215765014U (en) |
-
2021
- 2021-07-09 CN CN202121565787.8U patent/CN215765014U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101839475B (en) | Biomass fuel combustion device | |
| CN2879022Y (en) | Biomass vaporization boiler | |
| CN201652308U (en) | Biomass fuel burning device | |
| CN104315500A (en) | Biomass gasifying and combustion boiler | |
| CN201448851U (en) | Domestic garbage gasifying incinerator | |
| CN101363615B (en) | Lignose fuel boiler | |
| CN2906375Y (en) | Coking and heating double-purpose furnace using biomass granular fuel | |
| CN1987058B (en) | Combustion machine and steam turbine combined circulation system for gas boiler | |
| CN215765014U (en) | Bundled biomass pre-combustion gas coupling coal-fired unit power generation system | |
| CN203336576U (en) | High-efficiency energy-saving combined type boiler | |
| CN201335598Y (en) | Micro-negative pressure reverse-gasification coal-fired baking furnace | |
| CN113915621B (en) | High-parameter garbage gasification incineration power generation system and operation process thereof | |
| CN113280369B (en) | Household trumpet creeper heating furnace and using method thereof | |
| CN211345834U (en) | Efficient biomass fuel and gas dual-purpose hot blast stove system | |
| CN202598816U (en) | Horizontal internal-combustion dual-reinforcement biomass fuel hot water boiler | |
| CN102519035B (en) | Air and steam gasification downdraft gasified combustion boiler with catalyst internally arranged | |
| CN213955834U (en) | Lignite drying system for drying lignite by using circulating flue gas | |
| CN201547816U (en) | Multifunctional biomass gasification heating stove | |
| CN212345272U (en) | Directly-heated tobacco leaf curing barn using methanol fuel | |
| CN201407807Y (en) | Biomass environment-protection gasification superconducting boiler | |
| CN201563591U (en) | Negative-pressure reverse-gasification side-discharging coal-fired baking furnace | |
| CN201153498Y (en) | Coat gasification type baking oven | |
| CN203323109U (en) | Environment-friendly type biomass chain grate furnace | |
| CN101726012A (en) | Counter-burning type biomass superconductive gasifier | |
| CN111671126A (en) | Directly-heated tobacco leaf curing barn using methanol fuel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |