CN112254136A - Method and device for drying high-humidity material and recycling solid waste - Google Patents

Method and device for drying high-humidity material and recycling solid waste Download PDF

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Publication number
CN112254136A
CN112254136A CN202011169575.8A CN202011169575A CN112254136A CN 112254136 A CN112254136 A CN 112254136A CN 202011169575 A CN202011169575 A CN 202011169575A CN 112254136 A CN112254136 A CN 112254136A
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China
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furnace
drying
solid
gasification
gasification furnace
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马晓茜
李浚杰
余昭胜
张息奎
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/027Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
    • F23G5/0276Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage using direct heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/04Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44Details; Accessories
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44Details; Accessories
    • F23G5/442Waste feed arrangements
    • F23G5/444Waste feed arrangements for solid waste
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44Details; Accessories
    • F23G5/46Recuperation of heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00Pretreatment
    • F23G2201/10Drying by heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00Pretreatment
    • F23G2201/40Gasification
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2206/00Waste heat recuperation
    • F23G2206/10Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying

Abstract

The invention provides a device for drying high-humidity materials and recycling solid wastes, which comprises a combustion furnace, a gasification furnace feeder, a drying furnace and a drying furnace feeder, wherein high-temperature flue gas is generated in the combustion furnace, and the high-temperature flue gas of the combustion furnace is introduced into the drying furnace and the gasification furnace; the gas product outlet of the gasification furnace is communicated with the combustion furnace, the solid product outlet of the gasification furnace is communicated with the combustion furnace, and the gasification furnace feeder feeds solid waste; the feeder of the drying furnace feeds high-humidity materials, and a dried product outlet of the drying furnace is communicated with the combustion furnace. And correspondingly provides a utilization method of the device. The method has the advantages of simplicity, convenience, practicability, graded utilization of heat energy, more gas products, good environmental protection effect, high conversion rate and high product added value, can be widely applied to treatment of biomass, high-humidity waste and urban combustible solid waste, and has wide application prospect.

Description

Method and device for drying high-humidity material and recycling solid waste
Technical Field
The invention belongs to the field of resource utilization, and particularly relates to a method and a device for drying a high-humidity material and recycling solid waste.
Background
With the development of social economy, the living standard of residents in China is continuously improved, and correspondingly, the consumption of various resources is increased. According to the annual newspaper of environmental pollution prevention and control of solid wastes of the national big and middle cities in 2019 of the department of ecological environment of China, the yield of urban domestic garbage of 200 big and middle cities in China is 21147.3 ten thousand tons only in 2018, and the yield of general industrial solid wastes is as high as 15.5 hundred million tons. On the one hand, the yield of solid waste is continuously increased; on the other hand, with the continuous development of the urbanization process, the coverage area of an urban built-up area is enlarged, the land cost is increased sharply, and the landfill is available without land. The solid waste can seriously harm the operation of cities if not treated, and the most common solid waste treatment modes in China at present are as follows: landfill, composting, incineration, and the like.
Landfill is one of the most widely applied treatment methods at present, however, the land landfill utilization rate of a landfill site is generally low, the side slope seepage prevention measures are not made in place, part of the landfill sites do not collect and treat landfill gas, and the unorganized discharge not only generates stink, but also aggravates greenhouse effect.
Compost is also one of the treatment methods for treating urban solid waste in China, but the compost treatment cannot solve the problem that stones, metal, glass and other wastes in the solid waste cannot be decomposed by microorganisms, and the compost generated after the compost treatment has low utilization rate and relatively high cost, and has obvious dependence on foreign technologies.
Although the incineration treatment has the advantages of large treatment capacity, good volume reduction and the like, the smoke generated in the waste incineration process contains a large amount of pollutant components, such as smoke dust, hydrogen chloride, sulfur oxides, nitrogen oxides, carbon monoxide, heavy metals, dioxin and the like.
The organic matter content in the solid waste is high, and most of the solid waste is combustible solid waste. For combustible solid waste, the gasification technology is an effective treatment means, has high harmless degree and small occupied area, but has the defects of higher operation cost, higher technical difficulty and general treatment capacity. In addition, part of industrial solid waste, municipal solid waste and most of biomass have the characteristics of high water content and low heat value, particularly the sludge is used, after the conventional pressure dehydration, the water content of the sludge is still 75-85%, the water content of the sludge can only be reduced to about 65% by continuously conditioning and dehydrating, and a large amount of conditioning agent is required to be added in the conditioning process, so that the treatment cost is increased, more impurities are introduced into the product, the environmental hidden danger of subsequent treatment is increased, and the recycling of the sludge after the treatment is limited. Advanced sludge deep dehydration technology is introduced in advanced application of sludge deep dehydration technology in municipal sludge treatment (environment and development: 98-99 in 05 stage 2020), different concentration technologies are required in the sludge concentration step of the technology, the practicability is low, a large amount of chemical conditioners are required to be added in the sludge conditioning step, more impurities are introduced into final press filtration water and sludge cakes, and the subsequent treatment is influenced.
The traditional mechanical dehydration treatment capacity is limited, redundant impurities are introduced, the water content is still high after treatment, relatively speaking, more ideal dehydration effect can be obtained by thermal drying, the water content of the sludge can be reduced to below 5%, but the thermal drying cost is high. Therefore, it is necessary to solve these problems by developing a technical solution capable of saving the operation cost and improving the treatment efficiency for the above-mentioned case of the solid waste or biomass.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method and a device for drying the high-humidity material and recycling the solid waste, which can simultaneously treat the high-humidity material and the solid waste, and have the advantages of high treatment rate and environmental protection.
In order to realize the purpose of the invention, the following technical scheme is adopted:
a device for drying high-humidity materials and recycling solid wastes, which comprises a combustion furnace, a gasification furnace feeder, a drying furnace and a drying furnace feeder,
high-temperature flue gas is generated in the combustion furnace, and the high-temperature flue gas of the combustion furnace is introduced into the drying furnace and the gasification furnace;
a gas product outlet of the gasification furnace is communicated with the combustion furnace, a solid product outlet of the gasification furnace is communicated with the combustion furnace, and a gasification furnace feeder is communicated with a feed inlet of the gasification furnace to feed solid waste;
the drying furnace feeder is communicated with the feeding hole of the drying furnace to feed high-humidity materials, and the dried product outlet of the drying furnace is communicated with the combustion furnace.
By adopting the technical scheme, high-humidity materials and solid wastes can be treated, the high-humidity materials are treated by the drying furnace to obtain water vapor and dry products, the water vapor enters the gasification furnace for further utilization, the dry products enter the combustion furnace for use as fuel, the gasification furnace treats the solid wastes to obtain gas products and solid products, and the solid products and the gas products both enter the combustion furnace for use as fuel, so that the high-efficiency treatment of the high-humidity materials and the solid wastes is realized, the final products can be reused, and the use of external resources is reduced.
Further, the drying furnace also comprises a heat exchanger, and the drying furnace is communicated with the gasification furnace through the heat exchanger. The heat exchanger is arranged to heat the water vapor in advance, so that the reduction of the pyrolysis and gasification rate in the gasification furnace is avoided.
Furthermore, the drying furnace comprises a steam outlet and a flue gas inlet, the steam outlet and the flue gas inlet are both communicated with the heat exchanger, and high-temperature flue gas of the combustion furnace is introduced into the drying furnace through the gasification furnace, the heat exchanger and the flue gas inlet.
Further, still include the dust remover, the drying furnace includes the waste gas vent, the waste gas vent with the dust remover intercommunication. And the dust remover is arranged to treat the tail gas and then discharge the tail gas, so that the pollution to the environment is reduced.
The solid storage device of the gasification furnace is communicated with a solid product outlet of the gasification furnace, the solid storage device of the drying furnace is communicated with a dried product outlet of the drying furnace, and the solid storage device of the gasification furnace and the solid storage device of the drying furnace are both communicated with the combustion furnace. Set up gasifier solid and take up storage device and drying furnace solid and take up storage device and collect dry product and solid product, send the product of collecting into the burning furnace as the fuel burning in order to stably provide high temperature flue gas as the condition, guarantee that whole processing procedure's lasts effectively going on, reduce the use of other outside burning materials, and still can be used for other industry with remaining product.
The gasification furnace solid storage device is communicated with the drying furnace solid storage device, and the discharge hole of the stirring feeding device is communicated with the combustion furnace.
Further, still include the gas holder, the gas holder with the gaseous product export of gasifier is communicate. A gas holder is provided to collect the surplus gas product.
The invention also provides a utilization method of the high-humidity material drying and solid waste recycling device, which comprises the following steps:
the drying furnace feeder feeds high-humidity materials into the drying furnace, and the gasification furnace feeder feeds solid wastes into the gasification furnace;
the high-humidity material in the drying furnace is heated and evaporated to obtain water vapor and a drying product, and the water vapor is heated by the heat exchanger and then enters the gasification furnace to be used as a gasification medium of the solid waste in the gasification furnace;
gasifying solid waste in the gasification furnace at high temperature to generate a solid product and volatile matters, reacting the solid product with the gasification medium, carrying out catalytic reforming on the volatile matters and a catalyst in the gasification furnace to generate a non-condensable gas product, introducing the gas product into the combustion furnace, and introducing the surplus gas product into the gas storage tank;
the dry product in the drying furnace enters the stirring and feeding device, and the solid product in the gasification furnace enters the stirring and feeding device;
and the stirring and feeding device uniformly stirs the solid product and the dry product and then sends the solid product and the dry product into the combustion furnace so as to provide high-temperature flue gas for combustion in the combustion furnace.
Further, before feeding materials into the drying furnace and the gasification furnace, adding auxiliary fuel into the combustion furnace to enable the combustion furnace to combust firstly and generate high-temperature flue gas, and stopping adding the auxiliary fuel when a gas product is introduced into the combustion furnace to enable the combustion furnace to stably generate the high-temperature flue gas; thereafter, auxiliary fuel may be added as appropriate so that high-temperature flue gas may be stably produced.
And further, introducing high-temperature flue gas in the combustion furnace into the gasification furnace, then introducing the high-temperature flue gas into a heat exchanger, heating water vapor in the heat exchanger, and then introducing the high-temperature flue gas into the drying furnace.
Compared with the prior art, the invention can realize the following beneficial effects:
(1) compared with the traditional gasification furnace, the gasification furnace adopts water vapor as the gasification medium of the solid waste, and finally generates a gas product mainly comprising synthesis gas, thereby ensuring higher carbon conversion rate and hydrogen yield of the solid waste, being capable of obtaining more gas products with high calorific value, and being applicable to other industries.
(2) The high-humidity material in the drying furnace can reach lower moisture content through thermal drying, the heat value is correspondingly improved, the applicable range is expanded, and the defects that the excess impurities are introduced due to the fact that a conditioner is additionally added in the traditional mechanical dehydration, and the moisture content is higher after the treatment are avoided; the water vapor generated by drying is recycled as a gasification medium in the gasification furnace, so that the equipment investment is reduced, and the waste of the drying steam and the energy consumption for preparing the gasification medium are avoided compared with the traditional drying device and the gasification furnace.
(3) The dried and gasified products, both dry and solid, can be used as furnace fuel and stored as process products for other industries.
(4) The combustion furnace is used for combusting partial gas products, dry products and solid products, so that heat required by the gasification furnace, the heat exchanger and the drying furnace is provided, and resources are saved and fully utilized.
(5) The method has the advantages of simplicity, convenience, practicability, graded utilization of heat energy, more gas products, good environmental protection effect and high added value of products, can be widely applied to treatment of biomass, high-humidity waste and urban combustible solid waste garbage, and has wide application prospect.
Drawings
FIG. 1 is a schematic process flow diagram of the method for drying the high-humidity material and recycling the solid waste.
In the figure: 1-a drying furnace feeder; 2-drying in a furnace; 3-a heat exchanger; 4-a drying furnace solid storage device; 5-a solid storage device of a gasification furnace; 6-stirring and feeding device; 7-gasifying the furnace; 8-gasifier feeder; 9-a gas storage tank; 10-a combustion furnace; 11-a dust remover; 12-chimney.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Examples (A) to (B)
Referring to fig. 1, the apparatus for drying high-humidity materials and recycling solid waste provided in this embodiment includes a combustion furnace 10, a gasification furnace 7, a gasification furnace feeder 8, a gasification furnace solid storage device 5, a drying furnace 2, a drying furnace feeder 1, a drying furnace solid storage device 4, a gas storage tank 9, a heat exchanger 3, a dust remover 11, a stirring feeding device 6, and a chimney 12.
The combustion furnace 10 is used for generating high-temperature flue gas, the high-temperature flue gas is introduced into the gasification furnace 7 and the drying furnace 2, and the solid waste and the high-humidity material are sequentially heated by the high-temperature flue gas, so that the temperature is raised to the normal working conditions of drying and gasification. The combustion furnace 10 can be filled with auxiliary fuel to burn to generate high-temperature flue gas, the auxiliary fuel is withdrawn when the dry products, solid products and gas products of the high-humidity materials and the solid wastes are taken as the combustion furnace fuel to ensure that the drying and gasification reaction is self-sustained, and the auxiliary fuel is taken as an auxiliary means for stable combustion. The auxiliary fuel is withdrawn after being preheated, and then the auxiliary fuel is used as an auxiliary means to meet the working condition change of the combustion furnace, and the high-humidity materials and the solid wastes are used as main fuels in the whole production process, so that the material processing capacity of equipment is improved, and the use cost of the auxiliary fuel is saved. The auxiliary combustion in this example is fuel oil.
The gas product outlet of the gasification furnace 7 is communicated with the combustion furnace 10 so as to lead the gas product in the gasification furnace into the combustion furnace for fuel, the gasification furnace feeder 8 is communicated with the feed inlet of the gasification furnace 7 so as to feed solid waste, and the gasification furnace solid storage device 5 is communicated with the solid product outlet of the gasification furnace 7. The drying furnace feeder 1 is communicated with a feeding hole of the drying furnace 2 to feed high-humidity materials, the drying furnace solid storage device 4 is communicated with a dried product outlet of the drying furnace 2, outlets of the gasification furnace solid storage device 5 and the drying furnace solid storage device 4 are both communicated with an inlet of the stirring feeding device 6, and an outlet of the stirring feeding device 6 is communicated with the combustion furnace 10 to feed a mixture of the stirred solid product and the dried product into the combustion furnace 10 to be used as fuel. In this embodiment, the gasifier feeder 8 and the drying furnace feeder 1 are both screw feeders. The dry product and the solid product can be respectively stored in a drying furnace solid storage device 4 and a gasification furnace solid storage device 5, part of the dry product and the solid product can be extracted according to the whole system requirement, and are uniformly stirred in a stirring feeding device 6 to be supplied to a combustion furnace as solid fuel for combustion, and the fuel source of the combustion furnace at this time comprises three types of gasified gas products, dry products and gasified solid products. The remaining dry and solid products can also be used as additional products for other industrial uses. The solid product and the dry product have larger difference in physical property, so that the combustion characteristics are different, the solid product and the dry product are uniformly stirred by the stirring and feeding device 6, and the uniformity of the fuel entering the furnace can be improved.
A catalyst is provided in the gasification furnace 7. A catalytic gasification mode is adopted, a catalyst is arranged in a gasification furnace, the gasification rate is improved by utilizing the high catalytic activity of the catalyst, and volatile matters generated in the gasification furnace 7 through high-temperature gasification react with the catalyst to generate gas products. In the embodiment, the catalyst adopts the high-temperature-resistant zeolite, and the high-temperature-resistant zeolite has wear resistance and a unique porous structure, can fully transfer heat and has good catalytic performance and high-temperature resistance.
The embodiment also comprises a heat exchanger 3, and the drying furnace 2 is communicated with the gasification furnace 7 through the heat exchanger 3. Specifically, the drying furnace 2 comprises a steam outlet and a flue gas inlet, both the steam outlet and the flue gas inlet are communicated with the heat exchanger 3, and the high-temperature flue gas of the combustion furnace 10 is introduced into the drying furnace 2 through the gasification furnace 7, the heat exchanger 3 and the flue gas inlet. The water vapor generated by the evaporation of the high-humidity material in the drying furnace 2 after being heated is heated by the heat exchanger 3 and then enters the gasification furnace 7 as a gasification medium of the solid waste. The high-temperature flue gas firstly heats solid waste in the high-temperature flue gas through the gasification furnace 7, then the high-temperature flue gas preheats water vapor through the heat exchanger, finally the high-temperature flue gas enters the drying furnace 2 to heat high-humidity materials to be fully dried, the high-temperature flue gas serves as a heat carrier and flows through the gasification furnace 7, the heat exchanger 3 and the drying furnace 2 in sequence, the temperature of the flue gas is continuously reduced along the flow, the requirements of different devices on heating temperature are met, and the heat energy of the flue gas can.
The embodiment also comprises a gas storage tank 9, and the gas storage tank 9 is communicated with the gas product outlet of the gasification furnace 7. The gas product from the gasification furnace 7 is preferentially fed to the combustion furnace 10 to be used as fuel, and if there is surplus gas product, the surplus gas product is fed to the gas storage tank 9 to be used for other purposes, so that the gas product can be fully utilized.
The embodiment further comprises a dust remover 11, and the drying furnace 2 comprises an exhaust gas exhaust port which is communicated with the dust remover 11. The flue gas with the heat utilized in the drying furnace 2 is introduced into a dust remover 11 for dust removal treatment and then is discharged through a chimney 12.
In this embodiment, drying furnace 2, heat exchanger 3 and gasifier 7 all adopt outer heat preservation technology, and the intermediate level lets in high temperature flue gas and heats, perhaps adopts shell and tube device, and intraductal circulation high temperature flue gas, material are put in outside the tubes space.
In this embodiment, the high-humidity material is used as the feed material of the drying furnace 2, and is characterized in that the moisture content is still high even after the traditional mechanical dehydration, and the high-humidity material can be materials such as sludge or kitchen garbage.
In the embodiment, solid waste is fed into a gasification furnace 7, water vapor is used as a gasification medium, the solid waste is heated by high-temperature flue gas to generate gasification reaction to generate a solid product and volatile components, and the volatile components are catalytically reformed in the furnace to generate a gas product; wherein the solid waste can be biomass, municipal solid waste or coal and other materials.
By adopting the device provided by the embodiment, high-humidity materials and solid wastes can be treated at the same time, water vapor and a dried product can be obtained by drying the high-humidity materials in the drying furnace 2, the obtained water vapor is heated by the heat exchanger 3 and then enters the gasification furnace 7 for further utilization, the obtained dried product is sent into the combustion furnace 10 to be used as combustion to generate high-temperature flue gas, the cyclic utilization is realized, and the device can also be used for other purposes in the industry; the solid waste is gasified only at high temperature in the gasification furnace to obtain a solid product and volatile components, the solid product can be sent into the combustion furnace 10 to be used as combustion to generate high-temperature flue gas, so that the cyclic utilization is realized, the solid product can also be used for other purposes in industry, and the carbon conversion rate and the yield of the volatile components can be further improved by the reaction of the solid product and steam; the volatile components and solid products generated by high-temperature gasification react with the volatile components generated by the reaction of water vapor and the catalyst in the gasification furnace 7 to generate a non-condensable gas product finally, the generated gas product can be introduced into the combustion furnace 10 to generate high-temperature flue gas, and the residual gas product can be stored in the gas storage tank 9. The embodiment can make full use of high-humidity materials and solid wastes, has high treatment efficiency, good environmental protection effect and high added value of products, can be widely applied to the treatment of biomass, high-humidity wastes and urban combustible solid waste garbage, and has wide application prospect.
Example two
Basically the same as the first embodiment, except that: the embodiment also provides a utilization method of the device provided by the first embodiment.
A utilization method of a high-humidity material drying and solid waste recycling device comprises the following steps:
a preheating stage: adding auxiliary fuel into the combustion furnace to make the combustion furnace produce high-temperature flue gas,
the drying furnace feeder 1 feeds the high-humidity material to the drying furnace 2, and the gasification furnace feeder 8 feeds the solid waste to the gasification furnace 7. The high-humidity material can be municipal sludge or papermaking sludge, the water content of the high-humidity material is high, sufficient water vapor required by downstream gasification can be provided, and the solid waste is biomass or municipal domestic waste or coal with low relative water content;
in the heating process, the high-humidity material in the drying furnace 2 is controlled at a lower temperature, so that the high-humidity material is mainly heated and dried but not pyrolyzed (the drying furnace is mainly used for drying, the temperature of the drying furnace can be controlled between 105 and 180 ℃ by controlling the temperature and the amount of flue gas entering the drying furnace, and the high-humidity material is only dried but not pyrolyzed); the high-humidity material is heated and evaporated to generate a large amount of water vapor, the water vapor is subjected to heat exchange and is heated by the heat exchange device 3, and then the water vapor enters the gasification furnace 7 to serve as a gasification medium of the solid waste, the temperature of the gasification furnace is controlled within the optimal temperature range of gasification reaction at the moment, and the temperature of the gasification furnace can be adjusted within the range of 600-800 ℃ according to different types of the solid waste;
the solid waste is firstly gasified at high temperature to generate a solid product and volatile components, the solid product reacts with gasification medium steam to further improve the carbon conversion rate and the volatile component yield, and then the volatile components are gasified through catalysis to generate a final non-condensable gas product. Part of gas products are sent into the combustion furnace according to the working condition of the combustion furnace, and surplus gas is sent into a gas storage tank to be used as a main product;
the drying furnace solid storage device 4 and the gasification furnace solid storage device 5 respectively collect the dried product and the solid product after the reaction of the drying furnace 2 and the gasification furnace 7, part of the dried product and part of the solid product can be extracted according to the whole system requirement, and are uniformly stirred in the stirring feeding device 6 to be supplied to the combustion furnace 10 as solid fuel for combustion, and the fuel source of the combustion furnace at this time comprises three types of gasified gas product, dried product and gasified solid product. The remaining dry and solid products can also be used as additional products for other industrial uses;
the auxiliary fuel is withdrawn after the preheating stage, and then the auxiliary fuel is used as an auxiliary means to meet the working condition change of the combustion furnace;
in this embodiment, the high-temperature flue gas from the combustion furnace 10 provides heat for the gasification furnace 7, the heat exchanger 3, and the drying furnace 2. The high-temperature flue gas is firstly introduced into the gasification furnace 7 to heat the solid waste in the gasification furnace, then the high-temperature flue gas preheats water vapor through the heat exchanger 3, and finally enters the drying furnace 2 to heat the high-humidity material to be fully dried; the high-temperature flue gas serves as a heat carrier and flows through the gasification furnace, the heat exchanger and the drying furnace in sequence, the temperature of the flue gas is continuously reduced along the flow, the requirements of different devices on heating temperature are met, and the heat energy of the flue gas can be fully utilized in a grading manner.
And exhausting the flue gas after the heat utilization is carried out on the flue gas. Specifically, the exhaust gas enters the dust separator 11 for treatment and then is discharged through a stack.
The embodiments of the present invention are not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and they are included in the scope of the present invention.

Claims (10)

1. The utility model provides a high wet material drying and solid waste utilization equipment that gives resources, its characterized in that: comprises a combustion furnace (10), a gasification furnace (7), a gasification furnace feeder (8), a drying furnace (2) and a drying furnace feeder (1),
high-temperature flue gas is generated in the combustion furnace (10), and the high-temperature flue gas of the combustion furnace (10) is introduced into the drying furnace (2) and the gasification furnace (7);
the gas product outlet of the gasification furnace (7) is communicated with the combustion furnace (10), the solid product outlet of the gasification furnace (7) is communicated with the combustion furnace (10), and the gasification furnace feeder (8) is communicated with the feed inlet of the gasification furnace (7) to feed solid wastes;
the drying furnace feeder (1) is communicated with a feeding hole of the drying furnace (2) to feed high-humidity materials, a dried product outlet of the drying furnace (2) is communicated with the combustion furnace (10), and a steam outlet of the drying furnace (2) is communicated with the gasification furnace (7).
2. The device for drying the high-humidity material and recycling the solid waste as the resource as claimed in claim 1, wherein: the drying furnace (2) is communicated with the gasification furnace (7) through the heat exchanger (3).
3. The device for drying the high-humidity material and recycling the solid waste as the resource as claimed in claim 2, wherein: the drying furnace (2) further comprises a flue gas inlet, the steam outlet and the flue gas inlet are communicated with the heat exchanger (3), and high-temperature flue gas of the combustion furnace (10) is introduced into the drying furnace (2) through the gasification furnace (7), the heat exchanger (3) and the flue gas inlet.
4. The device for drying the high-humidity material and recycling the solid waste as the resource as claimed in claim 1, wherein: still include dust remover (11), drying furnace (2) include the exhaust gas vent, the exhaust gas vent with dust remover (11) intercommunication.
5. The device for drying the high-humidity material and recycling the solid waste as the resource as claimed in claim 1, wherein: the device is characterized by further comprising a gasification furnace solid storage device (5) and a drying furnace solid storage device (4), wherein the gasification furnace solid storage device (5) is communicated with a solid product outlet of the gasification furnace (7), the drying furnace solid storage device (4) is communicated with a dried product outlet of the drying furnace (2), and the gasification furnace solid storage device (5) and the drying furnace solid storage device (4) are both communicated with the combustion furnace (10).
6. The device for drying the high-humidity material and recycling the solid waste as the resource as claimed in claim 5, wherein: the gasification furnace solid storage device is characterized by further comprising a stirring and feeding device (6), wherein a feeding hole of the stirring and feeding device (6) is communicated with the gasification furnace solid storage device (5) and the drying furnace solid storage device (4), and a discharging hole of the stirring and feeding device (6) is communicated with the combustion furnace (10).
7. The device for drying the high-humidity material and recycling the solid waste according to any one of claims 1 to 6, wherein: the gasifier is characterized by further comprising a gas storage tank (9), wherein the gas storage tank (9) is communicated with a gas product outlet of the gasifier (7).
8. A method for utilizing the apparatus for drying high-humidity materials and recycling solid wastes as resources according to any one of claims 1 to 7, which comprises the following steps:
the drying furnace feeder (1) feeds high-humidity materials into the drying furnace (2), and the gasification furnace feeder (8) feeds solid wastes into the gasification furnace (7);
the high-humidity material in the drying furnace (2) is heated and evaporated to obtain water vapor and a drying product, and the water vapor is heated by the heat exchanger (3) and then enters the gasification furnace (7) to be used as a gasification medium of the solid waste in the gasification furnace (7);
the solid waste in the gasification furnace (7) is gasified at high temperature to generate a solid product and volatile matters, the solid product reacts with the gasification medium, the volatile matters are catalytically reformed with a catalyst in the gasification furnace (7) to generate a non-condensable gas product, the gas product is introduced into the combustion furnace (10), and the surplus gas product is introduced into the gas storage tank (9);
the dry products in the drying furnace (2) enter the stirring and feeding device (6), and the solid products in the gasification furnace (7) enter the stirring and feeding device (6);
the stirring feeding device (6) uniformly stirs the solid product and the dry product and then sends the solid product and the dry product into the combustion furnace (10) so as to provide high-temperature flue gas for combustion in the combustion furnace (10).
9. The method for drying the high-humidity material and recycling the solid waste as the resource as claimed in claim 8, wherein the method comprises the following steps: before feeding materials into the drying furnace (2) and the gasification furnace (7), adding auxiliary fuel into the combustion furnace (10) to enable the auxiliary fuel to be combusted firstly and generate high-temperature flue gas, and stopping adding the auxiliary fuel when gas products are introduced into the combustion furnace (10) to enable the combustion furnace (10) to stably generate the high-temperature flue gas; thereafter, auxiliary fuel may be added as appropriate so that high-temperature flue gas may be stably produced.
10. The method for drying the high-humidity material and recycling the solid waste according to any one of claims 8 to 9, wherein: high-temperature flue gas in the combustion furnace (10) is introduced into the gasification furnace (7) and then enters the heat exchanger (3), and water vapor is heated in the heat exchanger (3) and then enters the drying furnace (2).
CN202011169575.8A 2020-10-28 2020-10-28 Method and device for drying high-humidity material and recycling solid waste Pending CN112254136A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113862036A (en) * 2021-08-31 2021-12-31 湖南工业大学 Device and method for recycling solid waste

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113862036A (en) * 2021-08-31 2021-12-31 湖南工业大学 Device and method for recycling solid waste

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