CN114719270A - Pulverized coal fired boiler capable of directly mixing and burning garbage and harmless treatment method of mixed and burned garbage - Google Patents
Pulverized coal fired boiler capable of directly mixing and burning garbage and harmless treatment method of mixed and burned garbage Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 56
- 238000011282 treatment Methods 0.000 title claims abstract description 27
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- 238000002156 mixing Methods 0.000 title claims abstract description 13
- 238000002485 combustion reaction Methods 0.000 claims abstract description 74
- 239000000446 fuel Substances 0.000 claims abstract description 42
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 14
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- 238000000746 purification Methods 0.000 claims abstract description 8
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/24—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a vertical, substantially cylindrical, combustion chamber
- F23G5/28—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a vertical, substantially cylindrical, combustion chamber having raking arms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- 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
- Y02E20/12—Heat utilisation in combustion or incineration of waste
-
- 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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
Abstract
A pulverized coal fired boiler capable of directly blending and burning garbage and a harmless treatment method of the blended and burned garbage, and relates to a boiler and a harmless treatment method of the garbage. The pulverized coal boiler capable of directly mixing and burning garbage comprises a slag discharging device, a cold ash hopper, a combustion device, a flue gas purification device and an air preheater; the garbage combustion device at the bottom of the boiler and the air supply system are further included. The harmless treatment method of the mixed burning garbage of the pulverized coal boiler comprises the following steps: sorting garbage, removing non-combustible substances, and crushing combustible substances into garbage fuel; and secondly, feeding the garbage fuel into a garbage combustion device. On the premise of ensuring safe and stable operation of the coal-electric power unit, the invention realizes the optimal treatment of reduction, reclamation and harmlessness of industrial garbage and domestic garbage treatment, saves a large amount of garbage landfill or incineration cost, reduces the garbage treatment cost and saves land resources.
Description
Technical Field
The invention relates to a boiler and a garbage harmless treatment method.
Background
"construct the new power system taking new forms of energy as the main part", the new forms of energy taking wind-powered electricity generation and solar energy power generation as the representative will gradually become the main power of our country. However, wind power and solar power generation are intermittent unstable power sources, and the continuous power supply of the power sources needs to be supported and guaranteed by thermal power with regulation capability, so that the new situation provides unprecedented great challenges for the existing coal power industry, which means that the coal power industry with the highest carbon emission needs to be transformed into a low-carbon power source and must be transformed from a main power source with the power protection type into a regulation type power source. In the face of this transformation target, how should the existing storage-capacity coal-electric power generation unit be transformed? Is an urgent and prominent problem in front of electric power science and technology workers.
The low-carbon development of the coal and electricity industry needs to be capable of greatly reducing the usage amount of fossil raw material coal under the condition of generating the same electric quantity, and at present, the coal and electricity system relying on steam circulation is difficult to realize by improving the efficiency and reducing the coal consumption, and low-carbon fuel needs to be adopted for partial or whole fuel replacement.
The treatment principle of our country to industrial garbage and domestic garbage is reduction, resource utilization and harmlessness, the treatment method selected preferentially is comprehensive utilization, and the treatment method which cannot be comprehensively utilized can only be landfilled or incinerated. Land resources are occupied for landfill treatment, the environmental protection risk of leachate pollution exists, and professional incineration equipment and a smoke treatment device are needed for incineration treatment.
In recent years, with the continuous development of the social economy of China and the continuous increase of the number of urban population, the total amount of urban garbage is in a rapid increasing trend, and the reduction, recycling and harmless treatment of the garbage become social problems to be solved urgently. At present, the main garbage incineration methods comprise grate furnace incineration, fluidized bed furnace incineration and the like, and because the main garbage incineration methods are limited by the temperature level (900 ℃) of a hearth of the garbage incinerator, the discharged flue gas contains dioxin which is a highly toxic substance and can affect the environment.
Disclosure of Invention
The invention provides a pulverized coal fired boiler capable of directly blending and burning garbage and a harmless treatment method of the blended and burned garbage.
The pulverized coal boiler capable of directly mixing and burning garbage comprises a slag discharging device 1, a cold ash hopper 2, a combustion device 3, a flue gas purification device 4 and an air preheater 5;
the boiler also comprises a garbage combustion device at the bottom of the boiler and an air supply system 7;
the garbage combustion device is a mechanical grate combustion device or a grate firing fluidized combustion device; the garbage combustion device is positioned in the cold ash hopper 2; the side wall of the cold ash hopper is provided with a garbage feeding hole 2-1;
the air supply system 7 comprises two air supply pipelines, the input end of a fan in the first air supply pipeline is connected with the air preheater 5 through an air supply pipeline 7-2, and the output end of the fan 7-1 is connected with a combustion-supporting air port 2-2 at the bottom of the cold ash bucket through an air supply pipeline 7-2; the input end of a fan 7-1 in the second air supply pipeline is connected with an air preheater 5 through an air supply pipeline 7-2, and the output end of the fan 7-1 is connected with a combustion-supporting air port 2-3 on the side wall of the ash cooling bucket through the air supply pipeline 7-2.
The harmless treatment method for the mixed burning garbage of the pulverized coal fired boiler comprises the following steps:
sorting garbage, removing incombustible substances, and crushing the combustible substances into garbage fuel;
secondly, feeding the garbage fuel into a garbage combustion device;
wherein, the particle size of the garbage fuel in the step one is less than 50 mm.
The invention realizes 'direct garbage co-combustion coupling power generation', namely direct garbage and coal coupling co-combustion, and continuously increases the garbage co-combustion amount under possible conditions until finally realizing the direct fuel replacement of large proportion of garbage co-combustion.
The renewable energy resources such as garbage power generation, wind power generation, solar power generation and the like are the same as electricity, and are electricity production modes with (nearly) zero carbon emission, and the garbage power generation has the advantages that the wind power generation and the solar power generation do not have, namely, in the natural world, the resource quantity of industrial and domestic garbage generated by annual cycle is relatively stable, and garbage fuel can be transported and stored for use all the year round. The invention utilizes a large-scale high-efficiency coal-fired unit to directly mix and burn garbage fuel for power generation, is an advanced technology for realizing low-zero carbon emission power generation, can greatly improve the reduction and resource utilization of urban garbage, realizes the low-efficiency treatment of garbage solid waste to high-value utilization, realizes carbon dioxide emission reduction, can effectively inhibit the generation of dioxin in the garbage burning process, and can effectively solve the problem of other pollution emissions. The invention reforms the existing coal-electricity unit to directly mix and burn garbage, can obviously reduce the carbon emission of the coal-electricity unit, improves the flexibility of coupling power generation of coal and non-fossil substances, further enhances the sustainability of coal-fired power generation, and is a feasible way for the low-carbon development of coal-electricity.
The invention treats the municipal industrial waste and the domestic waste by directly co-firing depending on a high-efficiency boiler combustion system and a pollutant centralized treatment facility of an existing coal-fired power plant unit, so as to solve the social treatment problem of 'refuse surrounding', increase the power supply of high-quality renewable energy sources, realize the sustainability of coal-electricity development and promote the low-carbon clean development of the coal-electricity industry.
The invention solves the 'adjacency effect' of the newly-built garbage power plant, reduces the investment of the newly-built garbage incineration power plant, the smoke treatment facility and the like, solves the 'garbage enclosing problem' and protects the environment; on the other hand, a large amount of existing thermal power resources are integrated and optimally configured, unit coal consumption of a thermal power generating unit can be reduced, future living and development environments of a coal-fired power plant are effectively improved, carbon emission is reduced, and flexibility of coupling power generation of coal and non-fossil substances is improved; and thirdly, a new profit point of the thermal power industry can be created, a new way is provided for the sustainable low-carbon development of the domestic thermal power industry, and the market prospect is wide.
On the premise of ensuring safe and stable operation of the coal-electric power unit, the invention realizes the optimal treatment of reduction, reclamation and harmlessness of industrial garbage and domestic garbage treatment, saves a large amount of garbage landfill or incineration cost, reduces the garbage treatment cost and saves land resources.
Drawings
FIG. 1 is a schematic structural view of a conventional pulverized coal fired boiler;
FIG. 2 is a schematic structural diagram of a pulverized coal fired boiler directly mixed with garbage according to a second embodiment;
FIG. 3 is a schematic structural diagram of a pulverized coal fired boiler directly burning garbage according to a third embodiment;
in the figure, 8 is a garbage storage device, 9 is a garbage drying device, and 10 is a garbage fuel feeding device.
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.
The first embodiment is as follows: the present embodiment is described with reference to fig. 2 and 3, and the pulverized coal boiler directly mixed with garbage of the present embodiment includes a slag discharging device 1, a cold ash hopper 2, a combustion device 3, a flue gas purification device 4, and an air preheater 5;
the boiler also comprises a garbage combustion device at the bottom of the boiler and an air supply system 7;
the garbage combustion device is a mechanical grate combustion device or a grate firing fluidized combustion device; the garbage combustion device is positioned in the cold ash hopper 2; the side wall of the cold ash hopper is provided with a garbage feeding hole 2-1;
the air supply system 7 comprises two air supply pipelines, the input end of a fan in the first air supply pipeline is connected with the air preheater 5 through an air supply pipeline 7-2, and the output end of the fan 7-1 is connected with a combustion-supporting air port 2-2 at the bottom of the cold ash bucket through an air supply pipeline 7-2; the input end of a fan 7-1 in the second air supply pipeline is connected with an air preheater 5 through an air supply pipeline 7-2, and the output end of the fan 7-1 is connected with a combustion-supporting air port 2-3 on the side wall of the ash cooling bucket through the air supply pipeline 7-2.
In the embodiment, the side wall combustion-supporting air ports 2-3 are positioned on the side walls of the two sides of the cold ash hopper.
The boiler bottom body structure is only transformed in the design of the embodiment, the integral basic structure of the pulverized coal boiler is kept unchanged, pulverized coal and garbage are directly and efficiently mixed and combusted in the pulverized coal boiler, and the garbage of the pulverized coal boiler is directly doped and combusted in a harmless manner. The embodiment can keep the boiler efficiency basically unchanged; keeping the output of the boiler unchanged; the requirement of environmental protection emission of the thermal power generating unit is met; the safety requirement of pulverized coal boiler garbage fuel combustion can be ensured; the requirement of the operation life of the pulverized coal boiler after the direct blending combustion of the garbage can be met; and can meet the requirements of ultra-low load, flexible and deep peak shaving operation of the coal-fired unit.
The pulverized coal boiler directly burning garbage has three working modes:
mode one, coal burning of a boiler of a thermal power coal-fired unit: the garbage combustion device and the air supply system 7 are stopped, only the original matching equipment of the pulverized coal boiler is operated, pulverized coal is simply combusted, and the combustion operation mode of the pulverized coal boiler before modification is kept. The original combustion device 3 is used for igniting the coal powder, and the heat generated by fuel combustion is transferred to a heating surface through radiation and convection heat exchange to heat a working medium. The flue gas passes through the water wall, the superheater, the reheater and the tail heating surface, and then is processed by the flue gas purification system to reach the emission index meeting the requirement, and ash slag generated by pulverized coal combustion is discharged out of the furnace through the slag discharge system.
Mode two, the direct garbage mixed burning of coal dust: the garbage and the coal powder are combusted simultaneously. The garbage is sent into a cold ash hopper at the bottom of the hearth through a garbage storage device, a garbage drying device and a garbage fuel feeding device and falls on a garbage combustion device, and the middle upper part of the hearth still adopts a pulverized coal combustion mode. The garbage fuel is ignited and combusted on the garbage combustion device, enters the cold ash bucket from two sides through the side wall combustion-supporting air, and meanwhile the bottom combustion-supporting air supplies oxygen for the combustion of the garbage fuel. Because the garbage combustion generates a part of heat, the coal powder combustion of the middle upper part can reduce the investment of a part of coal quantity, directly reduce the use of fossil fuel and quickly and directly reduce carbon. The pulverized coal combustion is also provided with pulverized coal and auxiliary air by the original combustion device, and flue gas generated by pulverized coal combustion and flue gas generated by garbage combustion at the lower part are supplied to a heating surface together for heat transfer and working medium heating. The ash slag generated by burning the coal dust and the garbage is discharged out of the furnace through a slag discharging device at the bottom of the boiler. Because the temperature of the hearth of the pulverized coal fired boiler is up to 1300-1500 ℃, the residence time of the flue gas is long, the dioxin and the precursor generated by garbage combustion can be completely decomposed, and the generation of the dioxin can be effectively inhibited. In addition, the tail flue gas of the original pulverized coal fired boiler is provided with a complete flue gas purification device 4, so that the problem of emission of other pollutants, harmful gases and the like can be effectively solved.
The second embodiment is as follows: the present embodiment is described with reference to fig. 2, and is different from the first embodiment in that: the layer combustion fluidized combustion device is a layer combustion-fluidized bed 6-1. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment is described with reference to fig. 3, and is different from the first embodiment in that: the mechanical grate combustion device is a grate 6-2. The rest is the same as the first embodiment.
The fourth concrete implementation mode is as follows: the present embodiment is different from one of the first to third embodiments in that: the fan is a booster fan. The others are the same as in one of the first to third embodiments.
The fifth concrete implementation mode: the present embodiment will be described with reference to fig. 2 and 3, and the method for harmless treatment of waste mixed in pulverized coal fired boilers according to the present embodiment is one of the first to fourth embodiments:
sorting garbage, removing incombustible substances, and crushing the combustible substances into garbage fuel;
secondly, feeding the garbage fuel into a garbage combustion device;
wherein, the particle size of the garbage fuel in the step one is less than 50 mm.
The embodiment can keep the boiler efficiency basically unchanged; keeping the output of the boiler unchanged; the requirement of environmental protection emission of the thermal power generating unit is met; the safety requirement of pulverized coal boiler refuse fuel combustion can be ensured; the requirement of the pulverized coal boiler on the service life after direct blending combustion of the garbage can be met; and can meet the requirements of ultra-low load, flexible and deep peak shaving operation of the coal-fired unit.
The sixth specific implementation mode: the present embodiment is different from the fifth embodiment in that: and drying the garbage fuel until the water content is less than 35%. The rest is the same as the fifth embodiment.
In this embodiment, if the dryness of the crushed refuse fuel satisfies the combustion requirement, the drying process may not be performed.
The seventh concrete implementation mode: the present embodiment is different from the fifth or sixth embodiment in that: and the dried garbage fuel in the step two is fed into the garbage combustion device by the garbage feeding device, and the other steps are the same as those of the fifth or sixth specific embodiment.
Example 1
The present embodiment is described with reference to fig. 3, in which the harmless treatment method of the co-combustion waste of the present embodiment:
sorting garbage, removing incombustible substances, and crushing the combustible substances into garbage fuel;
secondly, feeding the garbage fuel into a garbage combustion device;
wherein the particle size of the refuse fuel in the first step is less than 50 mm; if the humidity of the garbage fuel is more than 35%, drying is needed until the water content is less than 35%.
The pulverized coal boiler for directly mixing and burning the garbage used in the embodiment comprises a slag discharging device 1, a cold ash hopper 2, a combustion device 3, a flue gas purification device 4 and an air preheater 5;
the boiler also comprises a garbage combustion device at the bottom of the boiler and an air supply system 7;
wherein the garbage combustion device is a mechanical grate combustion device; the garbage combustion device is positioned in the cold ash hopper 2; the side wall of the cold ash hopper is provided with a garbage feeding hole 2-1;
the air supply system 7 comprises two air supply pipelines, the input end of a fan in the first air supply pipeline is connected with the air preheater 5 through an air supply pipeline 7-2, and the output end of the fan 7-1 is connected with a combustion-supporting air port 2-2 at the bottom of the cold ash bucket through an air supply pipeline 7-2; the input end of a fan 7-1 in the second air supply pipeline is connected with an air preheater 5 through an air supply pipeline 7-2, and the output end of the fan 7-1 is connected with a combustion-supporting air port 2-3 on the side wall of the ash cooling bucket through the air supply pipeline 7-2.
In the embodiment, the garbage fuel is fed into a cold ash hopper of a hearth of the pulverized coal boiler from a garbage feeding hole 2-1 through a garbage fuel feeding device and falls on an inclined fire grate 6-2, and the garbage fuel continuously rolls and is stirred on the surface of the fire grate to complete the processes of drying, firing, burning and burnout.
Example 2
The present embodiment will be described with reference to fig. 2, in which the method for harmless treatment of co-combustion garbage of the present embodiment comprises:
sorting garbage, removing incombustible substances, and crushing the combustible substances into garbage fuel;
secondly, feeding the garbage fuel into a garbage combustion device;
wherein, the particle size of the garbage fuel in the step one is less than 50 mm; if the humidity of the garbage fuel is more than 35%, drying is needed until the water content is less than 35%.
The pulverized coal boiler for directly mixing and burning the garbage used in the embodiment comprises a slag discharging device 1, a cold ash hopper 2, a combustion device 3, a flue gas purification device 4 and an air preheater 5;
the boiler also comprises a garbage combustion device at the bottom of the boiler and an air supply system 7;
wherein the garbage combustion device is a layer combustion fluidized combustion device; the garbage combustion device is positioned in the cold ash hopper 2; a garbage feeding port 2-1 is formed in the side wall of the cold ash hopper;
the air supply system 7 comprises two air supply pipelines, the input end of a fan in the first air supply pipeline is connected with the air preheater 5 through an air supply pipeline 7-2, and the output end of the fan 7-1 is connected with a combustion-supporting air port 2-2 at the bottom of the cold ash bucket through an air supply pipeline 7-2; the input end of a fan 7-1 in the second air supply pipeline is connected with an air preheater 5 through an air supply pipeline 7-2, and the output end of the fan 7-1 is connected with a combustion-supporting air port 2-3 on the side wall of the ash cooling bucket through the air supply pipeline 7-2.
In the embodiment, the refuse fuel is fed into a cold ash hopper of a hearth of the pulverized coal boiler from a refuse feed port 2-1 through a refuse fuel feeding device and falls into a grate-firing fluidized bed 6-1 at the bottom of the boiler, and the grate-firing fluidized bed 6-1 makes the refuse fuel fluidized and is controlled to be fired in a special fluidized state to finish burnout.
Claims (7)
1. The pulverized coal boiler capable of directly mixing and burning the garbage comprises a slag discharging device 1, a cold ash hopper 2, a combustion device 3, a flue gas purification device 4 and an air preheater 5;
the boiler is characterized by also comprising a garbage combustion device at the bottom of the boiler and an air supply system 7;
the garbage combustion device is a mechanical grate combustion device or a grate firing fluidized combustion device; the garbage combustion device is positioned in the cold ash hopper 2; a garbage feeding port 2-1 is formed in the side wall of the cold ash hopper;
the air supply system 7 comprises two air supply pipelines, the input end of a fan in the first air supply pipeline is connected with the air preheater 5 through an air supply pipeline 7-2, and the output end of the fan 7-1 is connected with a combustion-supporting air port 2-2 at the bottom of the cold ash bucket through an air supply pipeline 7-2; the input end of a fan 7-1 in the second air supply pipeline is connected with the air preheater 5 through an air supply pipeline 7-2, and the output end of the fan 7-1 is connected with a combustion-supporting air port 2-3 on the side wall of the cold ash bucket through the air supply pipeline 7-2.
2. The pulverized coal fired boiler capable of directly blending with garbage according to claim 1, characterized in that the stratified combustion fluidized bed combustion device is a stratified combustion-fluidized bed 6-1.
3. The pulverized coal fired boiler capable of directly blending with garbage according to claim 1, wherein the mechanical grate combustion device is a grate 6-2.
4. The pulverized coal fired boiler capable of directly co-firing refuse as claimed in claim 1, 2 or 3, characterized in that the fan is a forced air fan.
5. The harmless treatment method for the mixed combustion garbage of the pulverized coal fired boiler according to claim 1 is characterized by comprising the following steps:
sorting garbage, removing incombustible substances, and crushing the combustible substances into garbage fuel;
secondly, feeding the garbage fuel into a garbage combustion device;
wherein, the particle size of the garbage fuel in the step one is less than 50 mm.
6. The method of claim 5, wherein the step of drying the waste fuel is performed to a moisture content of less than 35%.
7. The method of claim 5, wherein the dried waste fuel in step two is fed from a waste feeder to a waste combustion device.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1438448A (en) * | 2002-12-24 | 2003-08-27 | 北京悟能科技有限公司 | Garbage coal-powder compound burning-incinerating furnace |
| CN101699166A (en) * | 2009-11-16 | 2010-04-28 | 上海交通大学 | Bottom air spout set of tangentially-fired coal-burning boiler |
| CN101986028A (en) * | 2010-11-18 | 2011-03-16 | 浙江大学 | Low-NOx W-type flame boiler with dry bottom hopper and furnace bottom air supplies distributed in bielliptical shape |
| CN102563692A (en) * | 2011-12-19 | 2012-07-11 | 西安交通大学 | Early-warning adjustment system and early-warning adjustment method for preventing detonation of large-scale power station pulverized-fuel boiler furnace |
| CN202613431U (en) * | 2012-05-24 | 2012-12-19 | 陈�光 | Double-end circulating fluidized bed boiler |
| CN103256610A (en) * | 2013-04-28 | 2013-08-21 | 哈尔滨工业大学 | W-shaped flame boiler with function of preventing cold ash hopper and slag well from being corroded |
| CN204987020U (en) * | 2015-06-23 | 2016-01-20 | 贵阳高新科翰科技有限公司 | Can effectively restrain burning furnace that burns that domestic waste burned emission of in -process harmful gas |
| CN108506938A (en) * | 2017-04-28 | 2018-09-07 | 上海明华电力技术工程有限公司 | A kind of coal-fired boiler classified method and system for burning the waste containing biomass |
| CN108506943A (en) * | 2017-04-28 | 2018-09-07 | 上海明华电力技术工程有限公司 | A kind of coal fired boiler of power plant burns the method and system of the waste containing biomass |
| CN207962692U (en) * | 2018-03-22 | 2018-10-12 | 哈尔滨科林泛尔环保技术有限公司 | It is a kind of for industrial coal powder boiler dry bottom hopper from deashing device |
| CN112432183A (en) * | 2020-10-23 | 2021-03-02 | 清华大学 | Waste incineration coupling boiler system |
| CN212869746U (en) * | 2020-08-12 | 2021-04-02 | 国电南京电力试验研究有限公司 | Wall-attached air system for preventing water-cooled wall of cold ash bucket of coal-fired boiler from corroding |
-
2022
- 2022-03-11 CN CN202210238169.5A patent/CN114719270A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1438448A (en) * | 2002-12-24 | 2003-08-27 | 北京悟能科技有限公司 | Garbage coal-powder compound burning-incinerating furnace |
| CN101699166A (en) * | 2009-11-16 | 2010-04-28 | 上海交通大学 | Bottom air spout set of tangentially-fired coal-burning boiler |
| CN101986028A (en) * | 2010-11-18 | 2011-03-16 | 浙江大学 | Low-NOx W-type flame boiler with dry bottom hopper and furnace bottom air supplies distributed in bielliptical shape |
| CN102563692A (en) * | 2011-12-19 | 2012-07-11 | 西安交通大学 | Early-warning adjustment system and early-warning adjustment method for preventing detonation of large-scale power station pulverized-fuel boiler furnace |
| CN202613431U (en) * | 2012-05-24 | 2012-12-19 | 陈�光 | Double-end circulating fluidized bed boiler |
| CN103256610A (en) * | 2013-04-28 | 2013-08-21 | 哈尔滨工业大学 | W-shaped flame boiler with function of preventing cold ash hopper and slag well from being corroded |
| CN204987020U (en) * | 2015-06-23 | 2016-01-20 | 贵阳高新科翰科技有限公司 | Can effectively restrain burning furnace that burns that domestic waste burned emission of in -process harmful gas |
| CN108506938A (en) * | 2017-04-28 | 2018-09-07 | 上海明华电力技术工程有限公司 | A kind of coal-fired boiler classified method and system for burning the waste containing biomass |
| CN108506943A (en) * | 2017-04-28 | 2018-09-07 | 上海明华电力技术工程有限公司 | A kind of coal fired boiler of power plant burns the method and system of the waste containing biomass |
| CN207962692U (en) * | 2018-03-22 | 2018-10-12 | 哈尔滨科林泛尔环保技术有限公司 | It is a kind of for industrial coal powder boiler dry bottom hopper from deashing device |
| CN212869746U (en) * | 2020-08-12 | 2021-04-02 | 国电南京电力试验研究有限公司 | Wall-attached air system for preventing water-cooled wall of cold ash bucket of coal-fired boiler from corroding |
| CN112432183A (en) * | 2020-10-23 | 2021-03-02 | 清华大学 | Waste incineration coupling boiler system |
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