CN110822449B - Sludge blending combustion system for scraper slag conveyor - Google Patents
Sludge blending combustion system for scraper slag conveyor Download PDFInfo
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- CN110822449B CN110822449B CN201910878572.2A CN201910878572A CN110822449B CN 110822449 B CN110822449 B CN 110822449B CN 201910878572 A CN201910878572 A CN 201910878572A CN 110822449 B CN110822449 B CN 110822449B
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- slag
- scraper
- waste gas
- conveyor
- valve
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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
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
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- 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
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- 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
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- 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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/06—Mechanically-operated devices, e.g. clinker pushers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2207/00—Control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2207/00—Control
- F23G2207/10—Arrangement of sensing devices
- F23G2207/112—Arrangement of sensing devices for waste supply flowrate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
Abstract
The invention relates to the field of thermal power generation, in particular to a sludge blending combustion system for a scraper slag conveyor, wherein a slag dragging chamber is positioned below a boiler furnace, the bottom of the boiler furnace is communicated with the top of the slag dragging chamber, the scraper slag conveyor is positioned in the slag dragging chamber, high-temperature slag generated by combustion of the boiler furnace falls into the slag dragging chamber under the action of gravity to be temporarily stored and soaked for cooling, a waste gas source sucks dirty waste gas in a sludge treatment workshop and sprays the waste gas through a nozzle arranged in the slag dragging chamber to meet the air inlet requirement at the bottom of the boiler furnace, the air injection quantity of the nozzle is controllable and convenient to measure, and meanwhile, the waste gas sprayed by the nozzle can cool liquid in the scraper slag conveyor and send heat back to the boiler furnace to reduce the liquid temperature of the slag in the scraper slag conveyor.
Description
Technical Field
The invention relates to the field of thermal power generation, in particular to a sludge blending combustion system for a scraper slag conveyor.
Background
The sludge is a high-water-content floccule consisting of various microorganisms, organic particles and inorganic particles, impurities and salts in the raw water treatment process are enriched, some pollutants can be dissolved in water to cause water body pollution, and part of the sludge also contains a large amount of toxic and harmful substances, so that the sludge can greatly damage human bodies and ecological environment if not treated reasonably. At present, common sludge treatment methods comprise landfill, composting, incineration and the like, mainly use landfill as a main method, and the problems of pollution and secondary pollution caused by sludge which is not treated in a standardized way are increasingly serious.
Coal-fired thermal power generation is the most important power generation form in China at present. The chemical energy of the fire coal is converted into heat energy in a boiler by a thermal power plant, the heat energy is absorbed by water and water vapor, the steam does work in a steam turbine and is converted into mechanical energy, and the steam turbine drives a generator rotor to rotate so as to convert the mechanical energy into electric energy to be conveyed to thousands of households.
From the national condition that the coal-electricity unit occupies the main position in the power structure, the coal-fired biomass coupling power generation is a powerful measure for optimizing energy resource allocation, solving the pollution treatment problem, promoting ecological civilization construction and promoting the green development of the economic society. The coal-fired coupling biomass and coupling sludge power generation technical improvement project is a new power generation technical improvement project developed on the basis of the original coal-fired power plant, under the large background that the coal power is generated, a new coal power installation is not formed, the power production pressure is not caused, new pollutant emission is not increased, a cogeneration coal generator set is preferentially selected, and the national encouragement policy on the cogeneration project and the low-carbon clean development requirement and trend of the power industry are met.
Coal fired power plants often employ a scraper slag conveyor to remove slag. A scraper slag conveyor is arranged under each boiler, the outlet of a boiler furnace is inserted into the scraper slag conveyor, high-temperature slag generated by combustion of the boiler furnace falls into the scraper slag conveyor under the action of gravity, and the high-temperature slag is cooled in water in the scraper slag conveyor and then is conveyed out of a power plant. In order to reduce the drain water temperature of the scraper slag conveyor, equipment such as a draft cooling tower may be added, and not only waste heat is not utilized, but also power consumption for cooling the waste heat is increased.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide a sludge blending combustion system for a scraper slag conveyor, so as to solve the problem that the existing scraper slag conveyor and boiler structure cannot recover the heat of high temperature slag.
Based on the above, the invention provides a sludge blending combustion system for a scraper slag conveyor, which comprises a waste gas source, a slag scooping chamber and the scraper slag conveyor, wherein the slag scooping chamber is positioned below a boiler furnace, the boiler furnace is communicated with the slag scooping chamber, the scraper slag conveyor is positioned in the slag scooping chamber, a plurality of nozzles communicated with the waste gas source are arranged in the slag scooping chamber, and the nozzles face liquid in the scraper slag conveyor.
Preferably, the nozzle is located at the bottom of the slag chamber.
Preferably, the waste gas treatment device further comprises a boiler blower, an air inlet end of the boiler blower is communicated with the waste gas source through a first valve, and an air outlet end of the boiler blower is communicated with the boiler hearth.
Preferably, the nozzle is connected to the exhaust gas source through a second valve.
Preferably, the waste gas source is communicated with the outside through a third valve and a deodorization device which are communicated in sequence.
Preferably, the exhaust end of the first valve is provided with a first flow sensor.
Preferably, a filtering device is arranged between the first valve and the boiler blower.
Preferably, the exhaust end of the second valve is provided with a second flow sensor.
Preferably, an air distribution plate is arranged at the bottom of the slag dragging chamber, and the plurality of nozzles are arranged on the air distribution plate in an array manner.
According to the sludge blending combustion system for the scraper slag conveyor, the slag salvaging chamber is positioned below the boiler furnace, the bottom of the boiler furnace is communicated with the top of the slag salvaging chamber, the scraper slag conveyor is positioned in the slag salvaging chamber, high-temperature slag generated by combustion of the boiler furnace falls into the slag salvaging chamber under the action of gravity to be temporarily stored and soaked for cooling, a waste gas source sucks dirty waste gas in a sludge treatment workshop and the dirty waste gas is sprayed out through a nozzle arranged in the slag salvaging chamber to meet the air inlet requirement at the bottom of the boiler furnace, the air spraying amount of the nozzle is controllable and convenient to measure, meanwhile, the waste gas sprayed out from the nozzle can cool liquid in the scraper slag salvaging machine and send the heat back to the boiler furnace, and the temperature of the liquid in the scraper slag salvaging machine is reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of a sludge blending combustion system for a scraper slag conveyor according to an embodiment of the present invention;
fig. 2 is a schematic control logic diagram of the variable load operation of the boiler furnace of the sludge blending combustion system for the scraper slag conveyor in the embodiment of the invention.
Wherein, 1, an exhaust gas source; 11. a third valve; 12. a deodorizing device; 2. a slag fishing chamber; 3. a scraper slag conveyor; 4. a boiler furnace; 5. a wind distribution plate; 51. a nozzle; 52. a second valve; 53. a second flow sensor; 6. a boiler blower; 61. a first valve; 62. a first flow sensor; 63. and (4) a filtering device.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1 and 2, a sludge blending burning system for a scraper slag conveyor of the present invention is schematically shown, which comprises an exhaust gas source 1, a slag salvaging chamber 2 and a scraper slag conveyor 3. Drag for slag chamber 2 and be located boiler furnace 4's below, and boiler furnace 4's bottom communicates in the top of dragging for slag chamber 2, certainly, can set up fuel bearing bracket (fuel includes but not only is limited to fire coal and mud) as required between boiler furnace 4 and the dragging for slag chamber 2, is equipped with a plurality of hollow out construction on this bearing bracket, and after the fuel burning finishes, the remaining high temperature slag of burning falls into from bearing bracket's hollow out construction and drags for slag chamber 2. The scraper slag conveyor 3 is positioned in the slag scooping chamber 2, and high-temperature slag generated by combustion of the boiler hearth 4 falls into the slag scooping chamber 2 under the action of gravity to be temporarily stored and soaked for cooling, namely, the heat of the high-temperature slag is transferred to liquid in the scraper slag conveyor 3. The inlet end of waste gas source 1 is located current sludge workshop, and the dirty smoke and dust waste gas can be produced to the inevitable in the sludge workshop, and waste gas source 1 has the deodorization fan, but the waste gas in this deodorization fan suction sludge workshop. The slag salvaging chamber 2 is internally provided with a plurality of nozzles 51 communicated with the waste gas source 1, the nozzles 51 face to the liquid in the scraper slag salvaging machine 3, the nozzles 51 spray the waste gas in the sludge workshop to the high-temperature slag and the liquid in the slag salvaging chamber 2, and the waste gas amount sprayed by the nozzles 51 is controllable and convenient to measure, so the air input at the bottom of the boiler hearth 4 can be effectively controlled. Meanwhile, the waste gas sprayed from the nozzle 51 can cool the high-temperature slag and the liquid in the scraper slag conveyor 3 and send the heat back to the boiler furnace 4. Drag for sediment room 2 as boiler furnace 4's preheating device, can preheat the air that gets into boiler furnace 4 bottom to ensure that the temperature in boiler furnace 4 can satisfy the production demand.
Preferably, the bottom in the slag salvaging chamber 2 is provided with the air distribution plate 5, the plurality of nozzles 51 are arranged on the air distribution plate 5 in an array manner, and the air distribution plate 5 can enable the waste gas entering the slag salvaging chamber 2 to be more uniform.
The system further comprises a boiler blower 6, an air inlet end of the boiler blower 6 is communicated with the waste gas source 1 through a first valve 61, an air exhaust end of the boiler blower 6 is communicated with the boiler hearth 4, the boiler blower 6 is used for actively conveying air to the boiler hearth 4, the boiler blower 6 can be communicated with the middle part or the top part of the boiler hearth 4 (the actual communication position is arranged as required), and the first valve 61 is used for controlling the air inflow of the waste gas source 1 entering the boiler blower 6. Of course, the boiler blower 6 can be the only main air intake of the boiler furnace 4, and the boiler furnace 4 can also be equipped with other existing air intake devices. The exhaust end of the first valve 61 is provided with a first flow sensor 62, and the first flow sensor 62 can monitor the flow of air passing through the first valve 61 for remote monitoring. In order to avoid damage of the boiler blower 6 by particles in the exhaust gas, a filter device 63 is arranged between the first valve 61 and the boiler blower 6, the filter device 63 preferably being a bag-type dust collector.
The nozzle 51 is connected to the exhaust gas source 1 through a second valve 52, the second valve 52 is used for controlling the amount of intake air from the exhaust gas source 1 into the nozzle 51, similarly, the exhaust end of the second valve 52 is provided with a second flow sensor 53, and the second flow sensor 53 can monitor the flow rate of air passing through the second valve 52. The waste gas source 1 is communicated with the outside through a third valve 11 and a deodorization device 12 which are sequentially communicated, when the boiler hearth 4 stops, the third valve 11 can be opened, the waste gas of the waste gas source 1 is introduced into the deodorization device 12 and is discharged to the outside, and a plurality of activated carbon filters are arranged in the deodorization device 12.
The main control logics of each device in the sludge blending combustion system for the scraper slag conveyor are as follows:
(1) starting the system: the second valve 52100% open amount, the first valve 61, the filter 63, the third valve 11 and the deodorizing means 12 are closed, and the deodorizing fan is turned on.
(2) And (3) closing the system: the deodorizing fan is turned off, the second valve 52 is closed, and the first valve 61, the filtering means 63, the third valve 11 and the deodorizing means 12 are closed.
(3) The boiler furnace 4 operates with variable load: when the boiler furnace 4 becomes the load, the total air inflow of the boiler furnace 4 changes, therefore, the first valve 61 and the second valve 52 should be adjusted in a linkage manner according to the air amount required by the actual operation of the boiler furnace 4, and the air amount entering from the bottom of the boiler furnace 4 is ensured not to exceed 3% of the total air inflow of the boiler furnace 4 (the value can be adjusted according to the actual production or the model of the boiler), so as to avoid influencing the stable combustion of the boiler. The control can be performed according to the control logic diagram of fig. 2, wherein, for convenience of understanding, the first valve 61 is denoted as "air valve 1" in the figure, the second valve 52 is denoted as "air valve 2" in the figure, the first flow sensor 62 is denoted as "flow sensor 1" in the figure, and the second flow sensor 53 is denoted as "flow sensor 2" in the figure.
(4) Boiler shutdown (applicable to active shutdown of boiler or failure of scraper slag conveyor 3): the deodorizing means 12 is opened, the third valve 11 is opened, the first valve 61 is closed, and the second valve 52 is closed.
In summary, in the sludge blending combustion system for the scraper slag conveyor of the invention, the slag dragging chamber 2 is located below the boiler furnace 4, the bottom of the boiler furnace 4 is communicated with the top of the slag dragging chamber 2, the scraper slag conveyor 3 is located in the slag dragging chamber 2, high-temperature slag generated by combustion of the boiler furnace 4 falls into the slag dragging chamber 2 under the action of gravity to be temporarily stored and soaked for cooling, the waste gas source 1 sucks dirty waste gas in the sludge treatment workshop and sprays the dirty waste gas through the nozzle 51 arranged in the slag dragging chamber 2 to meet the gas inlet requirement at the bottom of the boiler furnace 4, the gas spraying amount of the nozzle 51 is controllable and convenient to measure, and meanwhile, the waste gas sprayed by the nozzle 51 can cool liquid in the scraper slag dragging machine 3 and send heat back to the boiler furnace 4 to reduce the temperature of the liquid in the scraper slag conveyor 3.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (8)
1. A sludge blending combustion system for a scraper slag conveyor is characterized by comprising a waste gas source, a slag scooping chamber and the scraper slag conveyor, wherein the slag scooping chamber is positioned below a boiler furnace, the boiler furnace is communicated with the slag scooping chamber, the scraper slag conveyor is positioned in the slag scooping chamber, a plurality of nozzles communicated with the waste gas source are arranged at the bottom in the slag scooping chamber, and the nozzles face to liquid in the scraper slag conveyor; the waste gas sprayed out of the nozzle can be used as a cooling medium to cool the high-temperature slag in the slag dragging chamber and the liquid in the scraper slag dragging machine.
2. The sludge co-combustion system for the scraper slag conveyor according to claim 1, further comprising a boiler blower, wherein an air inlet end of the boiler blower is communicated with the waste gas source through a first valve, and an air outlet end of the boiler blower is communicated with the boiler furnace.
3. The sludge blending combustion system for the scraper slag conveyor as claimed in claim 1, wherein the nozzle is communicated with the waste gas source through a second valve.
4. The sludge co-combustion system for the scraper slag conveyor as claimed in claim 1, wherein the waste gas source is communicated with the outside through a third valve and a deodorizing device which are sequentially communicated.
5. The sludge co-combustion system for the scraper slag conveyor as claimed in claim 2, wherein the exhaust end of the first valve is provided with a first flow sensor.
6. The sludge blending combustion system for the scraper slag conveyor as claimed in claim 2, wherein a filtering device is provided between the first valve and the boiler blower.
7. The sludge blending combustion system for the scraper slag conveyor as claimed in claim 3, wherein the exhaust end of the second valve is provided with a second flow sensor.
8. The sludge blending combustion system for the scraper slag conveyor as claimed in claim 1, wherein an air distribution plate is arranged at the bottom of the slag salvaging chamber, and the plurality of nozzles are arranged in an array on the air distribution plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910878572.2A CN110822449B (en) | 2019-09-17 | 2019-09-17 | Sludge blending combustion system for scraper slag conveyor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910878572.2A CN110822449B (en) | 2019-09-17 | 2019-09-17 | Sludge blending combustion system for scraper slag conveyor |
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| CN110822449A CN110822449A (en) | 2020-02-21 |
| CN110822449B true CN110822449B (en) | 2021-08-24 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201520769U (en) * | 2009-08-13 | 2010-07-07 | 北京中冶设备研究设计总院有限公司 | Novel steel slag granulating device |
| EP2287529A1 (en) * | 2008-05-16 | 2011-02-23 | Kawasaki Jukogyo Kabushiki Kaisha | Biomass-mixed-firing pulverized coal fired boiler and operation method of the boiler |
| CN102287835A (en) * | 2010-06-18 | 2011-12-21 | 中国电力工程顾问集团华东电力设计院 | Boiler wet-type slag removal system |
| JP2012180969A (en) * | 2011-03-01 | 2012-09-20 | Nippon Steel Engineering Co Ltd | Slag processing apparatus in waste melting processing plant |
| CN104437030A (en) * | 2014-11-03 | 2015-03-25 | 佛山市南海绿电再生能源有限公司 | System for comprehensive treatment of sludge odor |
| CN205664402U (en) * | 2016-03-24 | 2016-10-26 | 中国电力工程顾问集团西北电力设计院有限公司 | Thermal power factory scraper blade drags for sediment machine furnace bear building -up to be constructed |
| CN206310516U (en) * | 2016-12-19 | 2017-07-07 | 任治民 | A kind of boiler slag remover with gasification installation |
| CN206540140U (en) * | 2017-02-28 | 2017-10-03 | 广州拉斯卡工程技术有限公司 | One kind is corrosion-resistant to melt salt device for dragging dregs |
-
2019
- 2019-09-17 CN CN201910878572.2A patent/CN110822449B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2287529A1 (en) * | 2008-05-16 | 2011-02-23 | Kawasaki Jukogyo Kabushiki Kaisha | Biomass-mixed-firing pulverized coal fired boiler and operation method of the boiler |
| CN201520769U (en) * | 2009-08-13 | 2010-07-07 | 北京中冶设备研究设计总院有限公司 | Novel steel slag granulating device |
| CN102287835A (en) * | 2010-06-18 | 2011-12-21 | 中国电力工程顾问集团华东电力设计院 | Boiler wet-type slag removal system |
| JP2012180969A (en) * | 2011-03-01 | 2012-09-20 | Nippon Steel Engineering Co Ltd | Slag processing apparatus in waste melting processing plant |
| CN104437030A (en) * | 2014-11-03 | 2015-03-25 | 佛山市南海绿电再生能源有限公司 | System for comprehensive treatment of sludge odor |
| CN205664402U (en) * | 2016-03-24 | 2016-10-26 | 中国电力工程顾问集团西北电力设计院有限公司 | Thermal power factory scraper blade drags for sediment machine furnace bear building -up to be constructed |
| CN206310516U (en) * | 2016-12-19 | 2017-07-07 | 任治民 | A kind of boiler slag remover with gasification installation |
| CN206540140U (en) * | 2017-02-28 | 2017-10-03 | 广州拉斯卡工程技术有限公司 | One kind is corrosion-resistant to melt salt device for dragging dregs |
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