CN109282661B - Method for treating household garbage by hot blast furnace slag - Google Patents
Method for treating household garbage by hot blast furnace slag Download PDFInfo
- Publication number
- CN109282661B CN109282661B CN201811023832.XA CN201811023832A CN109282661B CN 109282661 B CN109282661 B CN 109282661B CN 201811023832 A CN201811023832 A CN 201811023832A CN 109282661 B CN109282661 B CN 109282661B
- Authority
- CN
- China
- Prior art keywords
- garbage
- blast furnace
- furnace slag
- flue gas
- slag
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/15—Tapping equipment; Equipment for removing or retaining slag
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a method for treating domestic garbage by using thermal-state blast furnace slag. The hot blast furnace slag is directly used as a high-temperature heat source, the garbage can be ignited and is burnt together with the garbage, the formed high-temperature flue gas is recycled through a power generation system, the garbage burning power generation amount is improved, and the waste heat recovery of the blast furnace slag is indirectly realized. The blast furnace slag formed after the blast furnace slag and the garbage are mixed and burned is close to the blast furnace slag in composition, and the comprehensive utilization of the burnout slag is not influenced.
Description
Technical Field
The invention relates to the technical field of blast furnace slag waste heat recovery, in particular to a method for treating domestic garbage by utilizing thermal-state blast furnace slag in a grate furnace.
Background
Blast furnace slag is a by-product of blast furnace smelting. The main components of the building material are calcium oxide, magnesium oxide, aluminum oxide, silicon dioxide and the like, and the building material can replace natural rocks to produce cement or slag differential and the like for building material products. The tapping temperature of the blast furnace slag is more than 1500 ℃, the heat contained in 1 ton of blast furnace slag is equivalent to 64kg of standard coal, the existing treatment method adopts a water quenching process, and basically no other effective waste heat recovery modes are available except that a small part of northern enterprises use the waste heat of slag flushing water for heating in winter. Therefore, not only sensible heat and latent heat of the blast furnace slag cannot be recycled, but also significant energy waste is caused. And the slag flushing process by the INBA method also causes a great deal of waste of water resources and serious pollution to the atmosphere, water and soil. Through investigation, the dry type waste heat recovery technology of the blast furnace slag developed at home and abroad is researched more, but no industrial application report exists.
With the rapid increase of population and the improvement of living standard in China, domestic garbage becomes an important problem influencing the environment in China increasingly. The waste incineration is one of the common ways of domestic waste treatment due to the advantages of high efficiency, rapidness, obvious volume reduction, high energy utilization rate and the like. The garbage incineration treatment is the most common garbage treatment method applied abroad at present, and the method has the greatest advantage of high garbage recycling and reduction treatment degree, and becomes a main path for treating household garbage in developed countries and an important component part in the power industry. The use of waste incineration technology in western developed countries has been in history for nearly 130 years and is still currently considered to be one of the most efficient and economical waste treatment technologies.
The garbage incineration process mainly comprises a furnace grate method, a circulating fluidized bed method, a pyrolysis method, a gasification method and the like, wherein the furnace grate method has the highest application proportion.
Disclosure of Invention
The invention aims to provide a method for treating domestic garbage by thermal-state blast furnace slag, which utilizes the domestic garbage treated by the thermal-state blast furnace slag in a grate furnace to heat and promote garbage combustion by using the waste heat of the thermal-state blast furnace slag, reduces the self consumption of garbage incineration energy and improves the garbage incineration generating capacity.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for treating domestic garbage by using hot blast furnace slag comprises the following steps:
1) and (4) pretreating the garbage, and performing dehydration fermentation.
2) Feeding raw materials into a furnace: the fermented garbage and the thermal state blast furnace slag are added on a fire grate of a fire grate furnace through 2 independent feed inlets. The garbage after fermentation is fed into the furnace before the thermal state blast furnace slag. The blast furnace slag is continuously fed from a slag ladle discharge hole.
3) And (4) burning the garbage. The garbage is ignited by the thermal state blast furnace slag under the action of combustion air, and is mixed and burned.
4) And (4) flue gas treatment. High-temperature flue gas generated after combustion enters a flue gas recovery system through a recovery pipeline, the particulate matter forms fly ash, hot air enters a power generation system for power generation, and then is discharged after reaching the standard through a desulfurization and dust removal process.
5) And discharging the slag. The burnout slag is discharged through the lower grate.
The garbage entering the furnace of the fire grate moves from top to bottom by the gravity, the combustion-supporting air is blown into the furnace from bottom to top by the blower, a drying layer, an oxidation combustion layer and a slag layer from top to bottom are sequentially formed in the furnace, and the garbage is dehydrated and dried, and the volatile gas is evaporated and combusted and the fixed carbon is combusted to perform successive stage reaction.
The flue gas treatment adopts a flue gas sedimentation-waste heat recovery-flue gas desulfurization dust removal process, high-temperature flue gas generated after waste incineration firstly enters a sedimentation chamber for continuous combustion, then is subjected to preliminary temperature reduction and waste heat recovery, and then adopts a flue gas treatment system combining semi-dry deacidification and cloth bag dust removal to remove harmful substances such as solid particles, oxysulfide, nitric oxide, hydrogen chloride, dioxin and the like in the flue gas so as to reach the national specified flue gas emission standard and reduce environmental pollution.
The addition amount of the thermal state blast furnace slag is 15-50% of that of the garbage, so that ignition and stable combustion of the garbage can be realized, and the preferable addition amount is 20-30%.
The blast furnace slag temperature is 1300-1500 ℃, and the preferable temperature is 1350-1400 ℃. The higher the temperature of the blast furnace slag is, the better the ignition and blending combustion effects are, but the transportation heat preservation pressure is increased, and the cost is too high; the temperature of the blast furnace slag is too low, the ignition capability is poor, even the theoretical combustion temperature of the garbage can be reduced, and the flow control and mixed combustion effects are obviously reduced after the viscosity of the blast furnace slag is increased.
Compared with the prior art, the invention has the beneficial effects that:
1) the hot blast furnace slag is directly used as a high-temperature heat source, the garbage can be ignited and is burnt together with the garbage, the formed high-temperature flue gas is recycled through a power generation system, the garbage burning power generation amount is improved, and the waste heat recovery of the blast furnace slag is indirectly realized.
2) The blast furnace slag formed after the blast furnace slag and the garbage are mixed and burned is close to the blast furnace slag in composition, and the comprehensive utilization of the burnout slag is not influenced.
The invention has obvious economic benefit and environmental benefit and great popularization and practical value in industry.
Detailed Description
The following description is given with reference to specific examples:
the following further illustrates embodiments of the invention:
example 1
A method for treating domestic garbage by using hot blast furnace slag comprises the following steps:
1) and (4) pretreating the garbage, and performing dehydration fermentation.
2) And respectively feeding the garbage and the thermal-state blast furnace slag into the furnace. And (3) scattering the fermented garbage and the hot blast furnace slag on a fire grate through 2 independent feed inlets. Wherein the thermal state blast furnace slag feeding port is positioned in the upper rear area of the garbage feeding port. The temperature of the blast furnace slag is 1400 ℃, and the adding amount of the blast furnace slag is 25 percent of that of the garbage. The blast furnace slag is continuously fed from a discharge hole at the lower part of the slag ladle.
3) And (4) burning the garbage. The garbage is ignited by the thermal state blast furnace slag under the action of combustion air, and is mixed and burned.
4) And (4) flue gas treatment. High-temperature flue gas generated after combustion enters a flue gas recovery system through a recovery pipeline, the particulate matter forms fly ash, hot air enters a power generation system for power generation, and then is discharged after reaching the standard through a desulfurization and dust removal process.
5) And discharging the slag. The burnout slag is discharged through the lower grate.
The garbage entering the furnace of the fire grate moves from top to bottom by the gravity, the combustion-supporting air is blown into the furnace from bottom to top by the blower, a drying layer, an oxidation combustion layer and a slag layer from top to bottom are sequentially formed in the furnace, and the garbage is dehydrated and dried, and the volatile gas is evaporated and combusted and the fixed carbon is combusted to perform successive stage reaction.
The flue gas treatment adopts a flue gas sedimentation-waste heat recovery-flue gas desulfurization dust removal process, high-temperature flue gas generated after waste incineration firstly enters a sedimentation chamber for continuous combustion, then is subjected to preliminary temperature reduction and waste heat recovery, and then adopts a flue gas treatment system combining semi-dry deacidification and cloth bag dust removal to remove harmful substances such as solid particles, oxysulfide, nitric oxide, hydrogen chloride, dioxin and the like in the flue gas so as to reach the national specified flue gas emission standard and reduce environmental pollution.
Claims (4)
1. The method for treating the domestic garbage by the thermal-state blast furnace slag is characterized by comprising the following steps of:
1) garbage pretreatment: carrying out dehydration fermentation;
2) feeding raw materials into a furnace: adding the fermented garbage and the hot blast furnace slag to a grate of a grate furnace through 2 independent feed inlets; wherein the fermented garbage is fed into a grate furnace before the thermal state blast furnace slag; the mass of the hot blast furnace slag is 15-50% of that of the garbage, and the temperature of the blast furnace slag is 1300-1500 ℃;
3) garbage combustion: igniting the garbage by the thermal-state blast furnace slag under the action of combustion air, and mixing and burning the garbage; the garbage entering the furnace grate moves from top to bottom by the gravity, and the combustion-supporting air is blown into the furnace grate from bottom to top by the blower;
4) flue gas treatment: high-temperature flue gas generated after combustion enters a flue gas recovery system through a recovery pipeline, the particulate matter forms fly ash, hot air enters a power generation system for power generation, and then is discharged after reaching the standard through a desulfurization and dust removal process;
5) discharging slag: the burnout slag is discharged through the lower grate.
2. The method for treating domestic garbage by using the thermal state blast furnace slag according to claim 1, characterized in that: the flue gas treatment adopts a flue gas sedimentation-waste heat recovery-flue gas desulfurization and dust removal process, high-temperature flue gas generated after waste incineration firstly enters a sedimentation chamber for continuous combustion, then is subjected to preliminary temperature reduction and waste heat recovery, and then adopts a flue gas treatment system combining semi-dry deacidification and cloth bag dust removal.
3. The method for treating domestic garbage by using the thermal state blast furnace slag according to claim 1, characterized in that: the adding mass of the thermal state blast furnace slag is 20-30% of that of the garbage.
4. The method for treating domestic garbage by using the thermal state blast furnace slag according to claim 1, characterized in that: the blast furnace slag temperature is 1350-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811023832.XA CN109282661B (en) | 2018-09-04 | 2018-09-04 | Method for treating household garbage by hot blast furnace slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811023832.XA CN109282661B (en) | 2018-09-04 | 2018-09-04 | Method for treating household garbage by hot blast furnace slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109282661A CN109282661A (en) | 2019-01-29 |
| CN109282661B true CN109282661B (en) | 2020-10-27 |
Family
ID=65184419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811023832.XA Active CN109282661B (en) | 2018-09-04 | 2018-09-04 | Method for treating household garbage by hot blast furnace slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109282661B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043867B (en) * | 2019-10-28 | 2021-09-14 | 鞍钢股份有限公司 | System and method for treating household garbage by utilizing ironmaking waste heat |
| CN114369691A (en) * | 2022-01-04 | 2022-04-19 | 中冶南方工程技术有限公司 | Urban solid waste and iron making cooperative system and method based on blast furnace slag waste heat utilization |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007120842A (en) * | 2005-10-27 | 2007-05-17 | Mitsubishi Heavy Ind Ltd | Method and its device for treating ash melting furnace granulation water |
| CN1888534A (en) * | 2006-07-19 | 2007-01-03 | 天津泰达环保有限公司 | Method for electric generating utilizing stalks mixed burned with city life refuses |
| CN101737784B (en) * | 2010-01-08 | 2011-06-29 | 东南大学 | Method for mixed burning of agriculture and forestry waste, sludge and household garbage by using grate furnace |
| CN106871125A (en) * | 2017-02-07 | 2017-06-20 | 北京高安屯垃圾焚烧有限公司 | A kind of incinerator sludge directly mixes co-combustion method and system |
| CN107655008A (en) * | 2017-09-01 | 2018-02-02 | 佛山市南海绿电再生能源有限公司 | A kind of flue gas processing method and system for reducing waste incineration Zhong content of dioxin |
| CN107869719A (en) * | 2017-09-30 | 2018-04-03 | 原凤敏 | A kind of high-efficiency refuse incinerating and treating device |
| CN207514917U (en) * | 2017-10-20 | 2018-06-19 | 世纪华扬环境工程有限公司 | Waste incineration and generating electricity device |
| CN108036327B (en) * | 2018-01-20 | 2022-02-15 | 北京中力信达环保工程有限公司 | Small-size energy-conserving high-efficient domestic waste incineration disposal system |
-
2018
- 2018-09-04 CN CN201811023832.XA patent/CN109282661B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109282661A (en) | 2019-01-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101468789B (en) | Domestic garbage transformation technique, system and apparatus without conventional fuel for supporting combustion | |
| CN100594228C (en) | Integral process for oil shale retorting oil refining and coal-char combustion power generation | |
| CN101786809B (en) | Garbage disposal system used in cement dry kiln production and disposal method thereof | |
| CN102746903B (en) | Large-scale domestic garbage dry distillation and gasification furnace without exhaust gas or dioxin emission | |
| CN202411083U (en) | High-temperature-air and efficient gasification collaborated waste pressing system by combining cement kiln and rotary furnace | |
| CN107255285B (en) | A kind of method and system of three drivings grate furnace mixed burning house refuse and sludge | |
| CN202203950U (en) | Organic solid waste pyrolyzation and gasification device | |
| CN100336751C (en) | City sludge fluidized bed combustion device and method | |
| CN102980193A (en) | Garbage incinerating exhaust gas using environment-friendly and energy-saving device | |
| CN109282661B (en) | Method for treating household garbage by hot blast furnace slag | |
| CN110805906A (en) | Sludge and garbage drying carbonization pyrolysis combustion treatment system and method | |
| CN201272768Y (en) | Household waste conversion system and equipment without combustion supported by conventional fuel | |
| CN102878569B (en) | High-temperature air combustion intensifying device and method applicable to low heating value mixed garbage | |
| CN102746902B (en) | Gasification method of organic wastes and special gasification furnace | |
| CN116147371A (en) | System and method for improving substitution rate of fossil fuel in cement industry | |
| CN201589272U (en) | Waste disposal system applied in production of cement dry-process rotary kiln | |
| CN107143864A (en) | A kind of technique of full combustion slime circulating fluidized bed boiler burning sludge | |
| CN102344259A (en) | Environmental-protection and energy-saving garbage incineration and waste gas utilization device | |
| CN102072491B (en) | Garbage incinerator device and ceramic new energy production system thereof | |
| CN102140003A (en) | Sludge drying method, incineration method, sludge incineration device, thermal power plant and system | |
| CN109282660B (en) | Method for treating household garbage by thermal state converter slag | |
| CN205690388U (en) | A kind of high volatile carbon-containing fuel hot efflorescence high efficient combustion device | |
| CN205668994U (en) | A kind of mud is dried and is burned combined cycle power plant | |
| CN114790398A (en) | Multi-fuel upgrading separation and coal-fired power plant boiler coupling process system | |
| CN210951326U (en) | Sludge and garbage drying carbonization pyrolysis combustion treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |