CN111609405A - Organic solid waste harmless gasification treatment system and method - Google Patents
Organic solid waste harmless gasification treatment system and method Download PDFInfo
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- CN111609405A CN111609405A CN202010355558.7A CN202010355558A CN111609405A CN 111609405 A CN111609405 A CN 111609405A CN 202010355558 A CN202010355558 A CN 202010355558A CN 111609405 A CN111609405 A CN 111609405A
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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
- 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
- F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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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
- F23G5/02—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
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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
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
- F23G5/16—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion in a separate combustion chamber
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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
- F23G5/46—Recuperation of heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/30—Pyrolysing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/40—Gasification
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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
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
- F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
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- 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
Abstract
The invention discloses an organic solid waste harmless gasification treatment system, which comprises a household garbage treatment system, an organic hazardous waste treatment system, an industrial organic solid waste treatment system and an agriculture and forestry organic solid waste treatment system; the household garbage treatment system comprises a gasification furnace, a cyclone combustion furnace and a waste heat recovery device; the organic hazardous waste treatment system comprises a gasification melting furnace; the industrial organic solid waste treatment system comprises a drying pyrolysis furnace, a gasification combustion furnace and a turbine generator set; the agriculture and forestry organic solid waste treatment system comprises a two-section moving bed. The invention also discloses a harmless gasification treatment method for the organic solid waste. The invention provides a gasification-free treatment method aiming at organic solid wastes with different characteristics, has reasonable technical structure design and wide application range, is suitable for treating domestic garbage, organic dangerous wastes, industrial organic solid wastes and agriculture and forestry organic solid wastes in the organic solid wastes, and meets the requirements of reduction, harmless treatment and resource utilization of the organic solid wastes.
Description
Technical Field
The invention relates to a harmless gasification treatment system and method for organic solid wastes.
Background
The organic solid waste refers to solid organic articles and substances which are produced in production, life and other activities and lose original utilization value or are discarded or abandoned although the utilization value is not lost, and mainly comprises domestic garbage, industrial solid waste, agriculture and forestry solid waste and the like. With the development of social economy, the organic solid wastes are greatly increased, so that the organic solid wastes are more and more difficult to treat, and the problems of environmental pollution and the like are gradually paid attention to various social circles.
At present, organic solid waste is generally treated by adopting a compost fermentation treatment mode, and the main defects of the compost treatment mode are that the resource utilization degree is low, the occupied area is large, the influence of climate is large, secondary pollution is not easy to control, the automation degree is low, the construction cost and the operation cost are high, and the like, and the problems influence the reasonable resource treatment of the organic solid waste. The gasification technology is a treatment technology for realizing reduction, harmlessness and recycling of organic solid wastes, can be combined with combustion and melting to treat the organic solid wastes with different characteristics, and has outstanding social benefits.
Disclosure of Invention
The invention aims to provide a reduction, harmless and recycling gasification treatment system and a method thereof aiming at organic solid wastes with different characteristics, which have the advantages of targeted classification, reasonable technical structure and wide application range, are suitable for treating domestic garbage, organic hazardous wastes, industrial organic solid wastes and agriculture and forestry organic solid wastes in the organic solid wastes, and meet the requirements of reduction, harmless treatment and recycling.
In order to achieve the purpose, the invention adopts the technical scheme that:
an organic solid waste harmless gasification treatment system comprises:
the household garbage treatment system comprises a gasification furnace, a cyclone combustion furnace and a waste heat recovery device, wherein the gasification furnace is used for gasifying household garbage, a generated gasification product enters the cyclone combustion furnace for combustion, and the waste heat recovery device is used for recovering heat energy of the cyclone combustion furnace;
the organic hazardous waste treatment system comprises a gasification melting furnace, a gasification melting furnace and a gas-liquid separator, wherein the gasification melting furnace is used for carrying out gasification melting treatment on organic hazardous waste to obtain reusable non-toxic molten glass bodies and combustible gas;
the industrial organic solid waste treatment system comprises a drying pyrolysis furnace, a gasification combustion furnace and a turbine generator set, wherein the drying pyrolysis furnace is used for drying and pyrolyzing industrial organic solid waste, generated pyrolysis gas and semicoke enter the gasification combustion furnace for combustion, and the turbine generator set is used for generating power by utilizing heat energy of the gasification combustion furnace;
the agriculture and forestry organic solid waste treatment system comprises a two-section moving bed, wherein a gasification zone at a first section is used for carrying out gasification treatment on agriculture and forestry organic solid waste, and generated gasification gas and semicoke enter a combustion zone at a second section for combustion to obtain reusable carbon.
Furthermore, the gasification furnace is a dividing wall type, the furnace contains a heat storage material, the heat storage material absorbs heat when the temperature in the furnace is higher than 500 ℃, and releases heat when the temperature in the furnace is lower than 500 ℃, so that the temperature in the furnace is maintained between 400 ℃ and 600 ℃.
Preferably, the heat storage material is a high-energy-storage-density nano ceramic heat storage composite material.
Furthermore, the structure in the cyclone combustion furnace is a snake-shaped structure. The serpentine pipeline can increase the retention time of the gas, so that the gas can be fully combusted, and the generation of dioxin precursors and secondary pollution is retarded.
Furthermore, the gasification melting furnace is provided with a multi-channel gasification nozzle, and the furnace comprises a gasification zone and a chilling chamber; the organic hazardous waste enters a gasification melting furnace through a multi-channel gasification nozzle and is subjected to gasification melting treatment in a gasification zone to obtain slag and medium-temperature fuel gas; the slag is treated in a chilling chamber to obtain nontoxic molten glass, and the intermediate temperature fuel gas is sequentially subjected to waste heat recovery and gas purification treatment to obtain combustible gas.
Furthermore, an auxiliary agent is added into the gasification melting furnace, so that the internal friction of dangerous waste slurry during flowing is reduced, the dispersion homogeneity and apparent viscosity of solid particles are improved, and the stability and rheological property of the slurry are improved.
Further, the dry pyrolysis furnace includes drying zone and pyrolysis zone, and industry organic useless admits to the dry pyrolysis furnace admits to, carries out drying process in the drying zone and reduces its moisture content, and the useless admits to the pyrolysis zone of solid after the drying carries out the pyrolysis, obtains pyrolysis gas and semicoke.
Further, the gasification combustion furnace comprises an oxidation combustion zone, a reduction gasification zone and an ember zone; and oxidizing and burning the semicoke in the oxidizing and burning area, gasifying the pyrolysis gas in the reducing and gasifying area to form small molecular gas, and finally burning the generated gas in the burnout area to ensure that the outlet gas meets the emission standard.
Furthermore, in the combustion zone of the two-section moving bed, the gasified gas and the semicoke are premixed and combusted, and the generation ratio of the carbon is controlled by regulating and controlling in stages.
A harmless gasification treatment method for organic solid waste comprises the following steps:
(1) the domestic garbage is treated by adopting a medium-low temperature gasification technology and a high-efficiency cyclone combustion technology:
the household garbage enters a gasification furnace for gasification treatment, and the generated gasification product enters a cyclone combustion furnace through a conveying pipeline, flows along a serpentine pipeline, and is fully combusted, so that the outlet flue gas meets the emission standard, and the waste heat generated in the combustion process is recycled;
(2) adopting a fluidized bed gasification and melting integrated technology to treat organic hazardous waste:
the method comprises the following steps of (1) putting organic hazardous waste into a gasification melting furnace, carrying out gasification together with an auxiliary agent in the gasification melting furnace to generate gasified fuel gas, carbon-containing fly ash and slag, mixing the gasified fuel gas, the carbon-containing fly ash, oxygen and an additive to carry out gasification melting treatment to obtain slag and medium-temperature fuel gas, treating the slag in a chilling chamber to obtain nontoxic molten glass, and sequentially carrying out waste heat recovery and gas purification treatment on the medium-temperature fuel gas to obtain combustible gas;
(3) the double fluidized bed gasification technology and the cogeneration technology are adopted to treat industrial organic solid waste:
industrial organic solid waste enters a drying pyrolysis furnace, drying treatment is carried out in a drying area to reduce the water content of the industrial organic solid waste, the dried solid waste enters a pyrolysis area to be pyrolyzed to obtain pyrolysis gas and semicoke, the pyrolysis gas and the semicoke enter a gasification combustion furnace through a pipeline, the semicoke is oxidized and combusted in an oxidation combustion area, the pyrolysis gas is gasified in a reduction gasification area to form small molecular gas, the generated gas is finally combusted in a burnout area, so that the outlet gas meets the emission standard, and the heat generated by the gasification combustion furnace generates electricity through a turbine generator set;
(4) adopting a moving bed gasification technology and a premixed combustion technology to treat the agriculture and forestry organic solid waste:
the agriculture and forestry organic solid waste enters a two-section moving bed, gasification is carried out in a gasification zone of a first section to obtain gasified gas and semicoke, the gasified gas and the semicoke enter a combustion zone of a second section, the production yield and the quality of carbon are increased by controlling in a grading way and premixing and combusting the gasified gas, and the gas is ensured to be discharged after reaching the standard.
Compared with the prior art, the invention has the beneficial effects that:
the whole system is clear in classification, the gasification technical method is reasonable, the application range is wide, secondary pollution in the organic solid waste treatment process is reduced, the reduction, harmless and recycling treatment of the organic solid waste is realized, the added value of products is improved, and waste is turned into wealth.
Drawings
FIG. 1 is a schematic view of the harmless gasification treatment system for organic solid wastes according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, an organic solid waste harmless gasification treatment system mainly comprises a domestic waste treatment system, an organic hazardous waste treatment system, an industrial organic solid waste treatment system and an agriculture and forestry organic solid waste treatment system.
The household garbage treatment system adopts a medium-low temperature gasification technology, a high-efficiency cyclone combustion technology and a waste heat recycling technology, and the main equipment comprises a gasification furnace, a cyclone combustion furnace and a waste heat recycling device.
The gasification furnace is used for gasifying the household garbage, can adopt a dividing wall type structure, contains a heat storage material in the furnace, preferably a high-energy-storage-density nano ceramic heat storage composite material, and performs heat absorption when the temperature in the furnace is higher than 500 ℃ and releases heat when the temperature in the furnace is lower than 500 ℃ so as to maintain the temperature in the furnace between 400 ℃ and 600 ℃.
The gasification result that the gasifier produced gets into swirl combustion furnace and carries out combustion processing, realizes discharge to reach standard, and the structure is snakelike structure in the swirl combustion furnace, and the inside snakelike pipeline can increase gaseous dwell time, makes its abundant burning, retards dioxin precursor and secondary pollution's formation, improves export flue gas quality. The waste heat recovery device is used for recovering the waste heat of the flue gas and recycling the waste heat.
The organic hazardous waste treatment system adopts a fluidized bed gasification and melting integrated technology, and the main equipment comprises a gasification and melting furnace.
The gasification melting furnace comprises a gasification zone and a chilling chamber, and also comprises a multi-channel gasification nozzle, and an auxiliary agent is added in the gasification melting furnace to reduce the internal friction when dangerous waste slurry flows, improve the dispersion homogeneity and apparent viscosity of solid particles, and improve the stability and rheological property of the slurry.
The method comprises the steps of enabling organic hazardous waste to enter a gasification melting furnace through a multi-channel gasification nozzle, carrying out gasification together with an auxiliary agent in the gasification melting furnace to generate gasification gas, carbon-containing fly ash and slag, mixing the gasification gas, the carbon-containing fly ash, oxygen and an additive to carry out gasification melting treatment to obtain slag and medium-temperature gas, treating the slag through a chilling chamber to obtain non-toxic molten vitreous bodies, sequentially carrying out waste heat recovery and gas purification treatment on the medium-temperature gas to obtain combustible gas, and recycling the generated non-glass-state toxic slag and gas.
The industrial organic solid waste treatment system adopts a double fluidized bed gasification technology and a cogeneration thermoelectric technology, and the main equipment comprises a drying pyrolysis furnace, a gasification combustion furnace and a turbine generator set.
The drying pyrolysis furnace is used for carrying out drying pyrolysis treatment on industrial organic solid waste and comprises a drying area and a pyrolysis area, after the industrial organic solid waste enters the drying pyrolysis furnace, drying treatment is carried out in the drying area to reduce the water content of the industrial organic solid waste, and the dried industrial organic solid waste enters the pyrolysis area on the upper portion to be pyrolyzed to obtain pyrolysis gas and semicoke.
Pyrolysis gas and semicoke pass through the pipeline and get into gasification combustion furnace, and gasification combustion furnace includes oxidation combustion zone, reduction gasification district and burn-out area from the bottom to the top, and the semicoke carries out the oxidation combustion in the oxidation combustion zone, and pyrolysis gas gasifies in the reduction gasification district, forms the small molecule gas, and the gas that generates carries out final burning in burn-out area department for export gas accords with emission standard. The heat generated by the gasification combustion furnace is used for generating electric quantity through the turbine generator set, and the electric quantity is reused.
The agriculture and forestry organic solid waste treatment system adopts a moving bed gasification technology and a premixed combustion technology, and the main equipment comprises a two-section moving bed.
The two-section moving bed comprises a gasification zone of a first section and a combustion zone of a second section, organic solid wastes of agriculture and forestry are gasified in the gasification zone of the first section to obtain gasified gas and semicoke, the gasified gas and the semicoke enter the combustion zone of the second section, the production yield and quality of carbon are increased by virtue of graded regulation and control and premixed combustion of the gasified gas, the gas is ensured to be discharged up to the standard, and the generated carbon can be recycled.
It should be noted that the above-mentioned adopted devices are all commercially available, and therefore, detailed description of the specific internal structure and connection relationship thereof is omitted.
The method for treating the organic solid waste harmless gasification treatment system of the present invention will be described with reference to several specific examples.
Example 1
Low-temperature gasification and high-efficiency cyclone combustion treatment of the domestic garbage.
The household garbage is conveyed to a treatment plant through a transport vehicle, enters a gasification furnace through a feeding device for gasification treatment, gasified product gas and particles existing in the gas enter a cyclone combustion furnace through a conveying pipeline, the gas flows along a serpentine pipeline in the cyclone combustion furnace and is combusted at the same time, the serpentine pipeline increases the retention time of the gas, the gas is fully combusted, the generation of dioxin precursors and secondary pollution is retarded, and outlet flue gas meets the emission standard; and the waste heat generated in the combustion process is recycled.
Example 2
And (3) carrying out gasification and melting integrated treatment on the multi-component organic hazardous waste fluidized bed.
Conveying the multi-component organic hazardous waste to a treatment plant through a transport vehicle, pretreating, introducing into a gasification melting furnace through a multi-channel gasification nozzle, and gasifying together with an auxiliary agent in the gasification melting furnace to generate gasified fuel gas, carbon-containing fly ash and slag; mixing the gasified fuel gas, the carbon-containing fly ash, oxygen and the additive for gasification and melting treatment to obtain slag and medium-temperature fuel gas; the slag is treated by a chilling chamber to obtain nontoxic molten glass, and waste heat recovery and gas purification treatment are sequentially carried out on medium-temperature fuel gas to obtain combustible gas; the generated non-toxic glass body and combustible gas can be reused.
Example 3
High-moisture industrial organic solid waste double fluidized bed gasification and cogeneration heat and power treatment.
Conveying the high-moisture industrial organic solid waste to a treatment plant through a transport vehicle, feeding the high-moisture industrial organic solid waste into a drying pyrolysis furnace through a feeding device, drying the high-moisture industrial organic solid waste in a drying zone to reduce the moisture content of the high-moisture industrial organic solid waste, pyrolyzing the dried solid waste in a pyrolysis zone at the upper part to obtain pyrolysis gas and semicoke, feeding the pyrolysis gas and the semicoke into a gasification combustion furnace through a pipeline, carrying out oxidation combustion on the semicoke in an oxidation combustion zone, gasifying the pyrolysis gas in a reduction gasification zone to form small molecular gas, and finally combusting the generated gas in a burnout zone to ensure that the outlet gas is in a composite emission standard; the heat generated by the dual fluidized bed gasification passes through a turbine generator set to generate electricity.
Example 4
Gasifying the agriculture and forestry organic solid waste moving bed and carrying out premixed combustion treatment.
Agriculture and forestry organic solid waste is transported to a treatment plant through a transfer cart, enters a two-section moving bed through a feeding device, is gasified in a first section of the moving bed to obtain gasified gas and semicoke, and the gasified gas and the semicoke enter a combustion area of a second section.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (10)
1. The utility model provides an organic solid useless innoxious gasification processing system which characterized in that: the method comprises the following steps:
the household garbage treatment system comprises a gasification furnace, a cyclone combustion furnace and a waste heat recovery device, wherein the gasification furnace is used for gasifying household garbage, a generated gasification product enters the cyclone combustion furnace for combustion, and the waste heat recovery device is used for recovering heat energy of the cyclone combustion furnace;
the organic hazardous waste treatment system comprises a gasification melting furnace, a gasification melting furnace and a gas-liquid separator, wherein the gasification melting furnace is used for carrying out gasification melting treatment on organic hazardous waste to obtain reusable non-toxic molten glass bodies and combustible gas;
the industrial organic solid waste treatment system comprises a drying pyrolysis furnace, a gasification combustion furnace and a turbine generator set, wherein the drying pyrolysis furnace is used for drying and pyrolyzing industrial organic solid waste, generated pyrolysis gas and semicoke enter the gasification combustion furnace for combustion, and the turbine generator set is used for generating power by utilizing heat energy of the gasification combustion furnace;
the agriculture and forestry organic solid waste treatment system comprises a two-section moving bed, wherein a gasification zone at a first section is used for carrying out gasification treatment on agriculture and forestry organic solid waste, and generated gasification gas and semicoke enter a combustion zone at a second section for combustion to obtain reusable carbon.
2. The system for harmless gasification treatment of organic solid wastes according to claim 1, wherein: the gasification furnace is a dividing wall type, the furnace contains a heat storage material, the heat storage material performs heat absorption when the temperature in the furnace is higher than 500 ℃, and the heat storage material performs heat release when the temperature in the furnace is lower than 500 ℃, so that the temperature in the furnace is maintained between 400 ℃ and 600 ℃.
3. The system for harmless gasification treatment of organic solid wastes according to claim 2, wherein: the heat storage material is a high energy storage density nano ceramic heat storage composite material.
4. The system for harmless gasification treatment of organic solid wastes according to claim 1, wherein: the structure in the cyclone combustion furnace is a snake-shaped structure.
5. The system for harmless gasification treatment of organic solid wastes according to claim 1, wherein: the gasification melting furnace is provided with a multi-channel gasification nozzle and comprises a gasification zone and a chilling chamber; the organic hazardous waste enters a gasification melting furnace through a multi-channel gasification nozzle and is subjected to gasification melting treatment in a gasification zone to obtain slag and medium-temperature fuel gas; the slag is treated in a chilling chamber to obtain nontoxic molten glass, and the intermediate temperature fuel gas is sequentially subjected to waste heat recovery and gas purification treatment to obtain combustible gas.
6. The system for harmless gasification treatment of organic solid wastes according to claim 5, wherein: the gasification melting furnace is internally added with an auxiliary agent for reducing internal friction when hazardous waste slurry flows, improving the dispersion homogeneity and apparent viscosity of solid particles and improving the stability and rheological property of the slurry.
7. The system for harmless gasification treatment of organic solid wastes according to claim 1, wherein: the drying pyrolysis furnace comprises a drying area and a pyrolysis area, industrial organic solid waste enters the drying pyrolysis furnace, drying treatment is carried out in the drying area to reduce the water content of the industrial organic solid waste, and the dried industrial organic solid waste enters the pyrolysis area to be pyrolyzed to obtain pyrolysis gas and semicoke.
8. The system for harmless gasification treatment of organic solid wastes according to claim 1, wherein: the gasification combustion furnace comprises an oxidation combustion zone, a reduction gasification zone and a burnout zone; and oxidizing and burning the semicoke in the oxidizing and burning area, gasifying the pyrolysis gas in the reducing and gasifying area to form small molecular gas, and finally burning the generated gas in the burnout area to ensure that the outlet gas meets the emission standard.
9. The system for harmless gasification treatment of organic solid wastes according to claim 1, wherein: in the combustion zone of the two-section moving bed, gasified gas and semicoke are premixed and combusted, and the generation ratio of carbon is controlled by stage regulation.
10. A harmless gasification treatment method for organic solid waste is characterized by comprising the following steps: the method comprises the following steps:
(1) the domestic garbage is treated by adopting a medium-low temperature gasification technology and a high-efficiency cyclone combustion technology:
the household garbage enters a gasification furnace for gasification treatment, and the generated gasification product enters a cyclone combustion furnace through a conveying pipeline, flows along a serpentine pipeline, and is fully combusted, so that the outlet flue gas meets the emission standard, and the waste heat generated in the combustion process is recycled;
(2) adopting a fluidized bed gasification and melting integrated technology to treat organic hazardous waste:
the method comprises the following steps of (1) putting organic hazardous waste into a gasification melting furnace, carrying out gasification together with an auxiliary agent in the gasification melting furnace to generate gasified fuel gas, carbon-containing fly ash and slag, mixing the gasified fuel gas, the carbon-containing fly ash, oxygen and an additive to carry out gasification melting treatment to obtain slag and medium-temperature fuel gas, treating the slag in a chilling chamber to obtain nontoxic molten glass, and sequentially carrying out waste heat recovery and gas purification treatment on the medium-temperature fuel gas to obtain combustible gas;
(3) the double fluidized bed gasification technology and the cogeneration technology are adopted to treat industrial organic solid waste:
industrial organic solid waste enters a drying pyrolysis furnace, drying treatment is carried out in a drying area to reduce the water content of the industrial organic solid waste, the dried solid waste enters a pyrolysis area to be pyrolyzed to obtain pyrolysis gas and semicoke, the pyrolysis gas and the semicoke enter a gasification combustion furnace through a pipeline, the semicoke is oxidized and combusted in an oxidation combustion area, the pyrolysis gas is gasified in a reduction gasification area to form small molecular gas, the generated gas is finally combusted in a burnout area, so that the outlet gas meets the emission standard, and the heat generated by the gasification combustion furnace generates electricity through a turbine generator set;
(4) adopting a moving bed gasification technology and a premixed combustion technology to treat the agriculture and forestry organic solid waste:
the agriculture and forestry organic solid waste enters a two-section moving bed, gasification is carried out in a gasification zone of a first section to obtain gasified gas and semicoke, the gasified gas and the semicoke enter a combustion zone of a second section, the production yield and the quality of carbon are increased by controlling in a grading way and premixing and combusting the gasified gas, and the gas is ensured to be discharged after reaching the standard.
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