CN115958041A - Multi-source solid waste cooperative treatment and utilization method and system - Google Patents
Multi-source solid waste cooperative treatment and utilization method and system Download PDFInfo
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Abstract
The invention discloses a multi-source solid waste cooperative treatment and utilization system, which comprises: the source control separation system is used for treating multi-source solid waste to obtain a primary product, wherein the primary product comprises primary recycled aggregate, recycled micro powder, muck, mud cakes, agricultural and forest soil, humus soil or organic matters, combustible matters and ceramsite correcting materials; the energy conversion system is used for cracking the combustible materials after the combustible materials enter the energy conversion system to obtain combustible gas and cracking residues; the energy cascade utilization and product modification coupling system enables the combustible gas and the flue gas with heat energy generated after the combustible gas is combusted to be subjected to cascade utilization in the energy cascade utilization and product modification coupling system and to be subjected to modification coupling with a primary product, so that ceramsite, gypsum with gelling activity, high-quality recycled aggregate and active micro powder are generated. The invention realizes multi-source solid waste cooperative disposal, and the garbage is really changed into resources.
Description
Technical Field
The invention relates to the field of multi-source solid waste disposal and resource utilization, in particular to a multi-source solid waste cooperative treatment and utilization method and system.
Background
With the rapid development of urban social economy and the gradual improvement of the living standard of residents in China, the yields of various domestic garbage, industrial solid waste, construction garbage, agriculture and forestry solid waste and the like are increased more and more, according to statistics, in 2020, the yields of domestic garbage in China and China exceed 2.3 hundred million tons, the yield of construction garbage exceeds 35 hundred million tons (the yields of construction waste, engineering slurry, demolition waste, decoration waste, engineering waste and residue soil are the largest and exceed 60%), and the yield of industrial solid waste exceeds 37 hundred million tons. The domestic garbage basically forms a pattern with incineration as a main part and landfill as an auxiliary part, but the domestic garbage of county and county cities is mainly treated by landfill. Industrial solid waste is mainly resource-oriented, but because of the huge yield, a large amount of industrial solid waste still needs to be disposed in landfills. The recycled aggregate, the dehydrated slurry and the engineering residue soil after the construction waste is subjected to conventional treatment can be used for building material production and urban and rural construction, but most recycled building materials are low in quality and low in utilization rate, a large amount of construction waste can only be subjected to landfill treatment, 100% resource utilization treatment of the construction waste cannot be realized, the building waste digestion pressure is increased, and combustible waste separated by the resource treatment of the construction waste still needs to be transported to a household garbage incineration plant or a landfill site for disposal. The national construction waste recycling rate does not exceed 20 percent. Because the solid wastes in China have wide sources and various types, different methods are selected for classified treatment according to different physical and chemical characteristics of the wastes, the quality of the products after resource utilization is low, and the resource rate of the landfill treatment which is needed by a large amount of solid wastes is low.
The sintered ceramsite is a light aggregate which is produced by roasting and foaming clay, shale, fly ash, sludge and the like serving as raw materials in a rotary kiln. The traditional ceramsite roasting heat source mostly adopts rice chaff and other agriculture and forestry solid wastes, but the price of the rice chaff is greatly increased in recent years, so that the fuel becomes beneficial to development under the background of a future double-carbon policy, and a new fuel roasting technology is urgently needed to be found.
Therefore, how to develop the multi-source solid waste cooperative disposal and resource utilization process and system based on the construction waste to realize the multi-source solid waste cooperative disposal and make the waste really become resources is a problem faced at present.
Disclosure of Invention
The invention provides a multi-source solid waste cooperative treatment and utilization method and system, which realize multi-source solid waste cooperative treatment and really change garbage into resources.
The technical scheme for solving the problems is as follows:
the multi-source solid waste cooperative treatment and utilization system comprises:
the source control separation system is used for treating multi-source solid waste to obtain a primary product, wherein the primary product comprises primary recycled aggregate, recycled micro powder, muck, mud cakes, agricultural and forest soil, humus soil or organic matters, combustible matters and ceramsite correcting materials;
the energy conversion system is used for cracking the combustible materials after the combustible materials enter the energy conversion system to obtain combustible gas and cracking residues;
the energy cascade utilization and product modification coupling system enables the combustible gas and the flue gas with heat energy generated after the combustible gas is combusted to be subjected to cascade utilization in the energy cascade utilization and product modification coupling system and to be subjected to modification coupling with a primary product, so that ceramsite, gypsum with gelling activity, high-quality recycled aggregate and active micro powder are prepared.
The multi-source solid waste cooperative treatment and utilization method adopts a multi-source solid waste cooperative treatment and utilization system and comprises the following steps:
(1) The multi-source solid waste comprises construction waste and common multi-source solid waste, the multi-source solid waste is treated by a source control separation system to obtain a primary product, and the primary product comprises primary recycled aggregate, recycled micro powder, muck, mud cakes, agricultural and forest soil, humus soil or organic matter, combustible matter and ceramsite correcting material;
(2) After the combustible enters an energy conversion system for cracking, obtaining combustible gas and cracking residues;
(3) The flue gas that has heat energy that makes combustible gas and combustible gas burning back produce circulates in energy cascade utilization and product modification coupled system, carries out cascade utilization and product modification coupling production, and the cascade utilization of the flue gas that has heat energy includes:
A. the mud cake is dried in a drying system to form a dried mud cake, the residue soil, the cracking residue and the ceramsite calibration material are input into a ceramsite production system, and the ceramsite production system is heated by using combustible gas to obtain ceramsite and first gradient waste heat flue gas;
B. feeding the first gradient waste heat flue gas into a lime desulfurization unit for desulfurization to generate flue gas desulfurization gypsum, and roasting and activating the regenerated aggregate by adopting the desulfurized first gradient waste heat flue gas to obtain high-quality aggregate, active micro powder and second gradient waste heat flue gas;
C. heating and modifying the flue gas desulfurization gypsum by using the second gradient waste heat flue gas to obtain semi-hydrated gypsum and third gradient waste heat flue gas;
D. and heating the drying system by adopting the third gradient waste heat flue gas to enable the mud cake in the drying system to form a dried mud cake.
The invention co-disposes multi-source solid wastes to realize the multi-element solid wastes co-disposal of construction wastes, large-piece wastes, garden wastes, agricultural and forestry wastes, household wastes and the like, products obtained after disposal can be completely utilized, meanwhile, combustible substances enter an energy conversion system to be cracked to generate combustible gas, the calorific value of the combustible gas after combustion can be completely recycled, the heat source is utilized in a cascade way to modify products and improve performance, the whole set of process system solves the problems that the traditional construction wastes are treated with dregs and combustible substances which need to be transported outside, the quality of recycled aggregate is not high and the recycling rate is low, the problem of sludge and sludge disposal is solved, cooperative disposal is realized, meanwhile, the problem of alternative energy in the production process of the ceramsite is solved through pyrolysis and gasification of multi-source solid waste combustible, energy is efficiently utilized, internal circulation of materials and energy is realized, intermediate products and high-added-value products are obtained in the internal circulation process, residual flue gas is used for preparing active mineral admixtures, carbon dioxide in the residual flue gas is consumed, carbon dioxide emission is reduced, double control of energy carbon in the urban multi-source solid waste cooperative disposal is realized, and zero emission and full utilization are really realized.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
As shown in fig. 1, the multi-source solid waste synergistic treatment and utilization system of the present invention comprises a source control separation system, an energy conversion system, an energy cascade utilization and product modification coupling system, a flue gas desulfurization unit, and a solid carbon conversion utilization unit, and the following describes each part and the relationship among each part in detail:
the source control separation system is used for treating multi-source solid waste to obtain a primary product, wherein the primary product comprises primary recycled aggregate, recycled micro powder, muck, mud cakes, agricultural and forest soil, humus soil or organic matters, combustible matters and ceramsite correcting materials.
The multi-source solid waste comprises construction waste, common multi-source solid waste and common industrial solid waste, wherein the mass ratio of the construction waste in the multi-source solid waste is more than 50%, for example, the mass ratio of the construction waste is 80%, the mass ratio of the common multi-source solid waste is 18%, and the mass ratio of the common industrial solid waste is 2%.
The construction waste is one or more of demolition waste, decoration waste, engineering residue soil, engineering slurry and engineering waste. The common multisource solid waste is one or more of domestic waste, large-piece waste, garden waste, agriculture and forestry waste, sludge and silt. The common industrial solid waste is one or more of coal gangue and fly ash.
The source control separation system comprises crushing equipment, sorting equipment, screening equipment, dewatering equipment and an auxiliary unit, wherein the crushing equipment can adopt one, two or three of a jaw crusher, a toothed roll crusher and a counterattack crusher. The sorting equipment can adopt one or more of a box type winnowing machine, a folded plate winnowing machine, a magnetic separator, an optical separator, an eddy current sorter, an intelligent robot, manual sorting equipment and a sand washer. The screening device can adopt one or more of a vibrating screen, a drum screen, a bouncing screen and a disc screen. The dewatering equipment can adopt one or more of a centrifugal dewaterer, a plate-and-frame filter press and dosing equipment. The auxiliary unit comprises one or more of a ploughshare stirring machine, a blast drier, a drier and a biological drying device.
The separation of the recycled aggregate adopts a box type winnowing machine or a folded plate winnowing machine to realize the separation of light and heavy materials, and adopts a light sorter to realize the separation of brick concrete. The recycled aggregate can be separated into light aggregate and heavy aggregate firstly, and then brick concrete is separated; or the brick concrete can be separated firstly, and then the light and heavy aggregate can be separated.
The energy conversion system processes the combustible materials, and the combustible materials enter the energy conversion system to be cracked to obtain combustible gas and cracked residues.
The energy cascade utilization and product modification coupling system enables the combustible gas and the flue gas with heat energy generated after the combustible gas is combusted to be subjected to cascade utilization in the energy cascade utilization and product modification coupling system and to be subjected to modification coupling with a primary product, so that ceramsite, gypsum with gelling activity, high-quality recycled aggregate and active micro powder are generated.
The energy cascade utilization and product modification coupling system is provided with a drying system, a ceramsite production system, a lime desulfurization unit, a roasting activation unit, a gypsum modification unit, a solid carbon conversion utilization unit and the like, combustible gas and flue gas with heat energy generated after the combustible gas is combusted circulate in the energy cascade utilization and product modification coupling system to carry out cascade utilization and product modification coupling production, and the cascade utilization of the flue gas with heat energy comprises the following steps:
A. the mud cake is dried in a drying system to form a dried mud cake, the residue soil, the cracking residue and the ceramsite correction material are input into a ceramsite production system, and the ceramsite and the first gradient waste heat flue gas are obtained after the ceramsite production system is heated by using combustible gas.
The dried sludge cake in the ceramsite raw material comprises dried sludge and dried slurry, and the proportion of the ceramsite raw material is as follows: 5-15 parts of dried sludge (oven-dried), 30-60 parts of dried mud (oven-dried), 25-65 parts of residue soil (oven-dried), 5-10 parts of cracking residue (oven-dried) and 5-15 parts of ceramsite correcting material.
Preferably, the temperature of the flue gas with heat energy for heating the ceramsite production system is 800-1200 ℃, and the sintering time is 15-120 min. The strength of the ceramsite is not high due to too low sintering temperature and too short sintering time, the performance requirement cannot be met, energy is wasted due to too high sintering temperature and too long sintering time, the sintering cost of the ceramsite is increased, and the quality of the ceramsite is influenced.
Preferably, the drying temperature of the mud cake is 80-120 ℃. Too high drying temperature can lead to the energy waste, and the temperature is crossed lowly can lead to mud cake drying efficiency to reduce, and the time extension.
B. And feeding the first gradient waste heat flue gas into a lime desulfurization unit for desulfurization to generate flue gas desulfurization gypsum, and roasting and activating the regenerated aggregate by adopting the desulfurized first gradient waste heat flue gas to obtain high-quality aggregate, active micro powder and second gradient waste heat flue gas. The lime desulfurization in the lime desulfurization unit may be one or more of limestone, lime and carbide slag.
Preferably, the surface of the recycled aggregate is coated with mortar, the recycled aggregate is roasted at high temperature, and after the mortar on the surface of the recycled aggregate is roasted at high temperature, the surface mortar structure becomes loose and falls off, so that high-quality aggregate and active micro powder are obtained. The temperature for roasting and activating the recycled aggregate is 400-800 ℃, and the roasting time is 20-120 min.
C. Heating and modifying the flue gas desulfurization gypsum by using the second gradient waste heat flue gas to obtain semi-hydrated gypsum and a third gradient waste heat flue gas, wherein the temperature of the second gradient waste heat flue gas is 100-200 ℃,
D. and heating the drying system by adopting the third gradient waste heat flue gas to enable the mud cake in the drying system to form a dried mud cake. The temperature of the third gradient waste heat flue gas is 60-120 ℃.
And further, inputting the regenerated micro powder obtained in the step (1), the flue gas output after heating in the step D and the active micro powder obtained in the step B into a carbon fixation conversion utilization unit, mixing the regenerated micro powder, the active micro powder and the flue gas, performing carbon fixation by using carbon dioxide in the flue gas, and obtaining the active mineral admixture.
Furthermore, the agricultural and forestry soil, the humus soil and the organic matters in the primary product are used for preparing greening soil or nutrient soil, wherein the agricultural and forestry soil accounts for 30-70 parts, the humus soil accounts for 20-45 parts, and the organic matters accounts for 10-25 parts.
Example 1
In a solid waste treatment station in a certain area, 10 ten thousand tons of demolished garbage, 15 ten thousand tons of decoration garbage, 25 ten thousand tons of engineering residue soil, 5 ten thousand tons of engineering slurry, 5 ten thousand tons of sludge (with the water content of 80 percent), 1 ten thousand tons of large garbage, 1 ten thousand tons of garden garbage and 1 ten thousand tons of agricultural and forestry waste are treated in a year.
Inorganic garbage such as demolition garbage, decoration garbage, engineering muck, engineering mud, sludge and the like is crushed by a crusher, iron metal is recovered by a magnetic separator, light impurities are removed by a winnowing machine, screening is carried out by a vibrating screen, brick and concrete separation is carried out by a light sorter, and the engineering mud is dehydrated to obtain 3.03 ten thousand tons of combustible substances, 750 tons of metal, 21.8 ten thousand tons of regenerated aggregate, 25.4 ten thousand tons of muck, 7500 tons of mud cakes and 5 thousand tons of mud cakes.
The heavy garbage, garden garbage and forestry and agricultural residues are crushed by a crusher, screened to remove soil, and the iron metal is recovered by a magnetic separator to obtain 2.7 ten thousand tons of light impurities, 1500 tons of metal and 1500 tons of forestry and agricultural soil.
3.03 million tons of combustible enter the light impurity conversion and are cracked by a system to obtain combustible gas and cracked residues, and the calorific value of the combustible gas is more than 1700kCal/Nm 3 And the combustible gas enters a ceramsite production system to be utilized at the first stage to fire the ceramsite.
And (3) preparing a ceramsite raw material (dry basis) from the residue soil, the cracking residue, the dried slurry and the dried sludge, and firing the ceramsite raw material (dry basis) in a ceramsite production system at the firing temperature of 1000 ℃ for 1h. Wherein, the proportion of the ceramsite raw materials is as follows: 10 parts of dried sludge (oven-dried), 40 parts of dried slurry (oven-dried), 50 parts of residue soil (oven-dried), 6 parts of cracking residue (oven-dried) and 8 parts of ceramsite correcting material.
Purifying high-temperature flue gas at an outlet of a ceramsite production system (ceramsite kiln) through a lime desulfurization unit, supplementing air, cooling to 600 ℃, allowing the flue gas to enter a product modification system for secondary utilization, roasting and activating the regenerated aggregate at 600 ℃ for 80min, wrapping mortar concrete on the surface of the regenerated aggregate, sintering the mortar concrete at high temperature, and enabling the sintering neck of a concrete binder to become brittle and fall off to obtain high-quality aggregate and active micro powder. And (4) desulfurizing the lime desulfurization unit to obtain dihydrate gypsum, and conveying the dihydrate gypsum to a desulfurization gypsum modification system.
And (3) supplementing air and cooling flue gas at the outlet of the product modification system to 160 ℃, utilizing the flue gas to dehydrate dihydrate gypsum in the desulfurization gypsum modification system in a three-stage manner, and dehydrating the dihydrate gypsum to obtain the hemihydrate gypsum. And residual gas enters a drying system for drying the mud cakes, and the dried mud cakes are obtained after the mud cakes are dried.
The humus soil and the agricultural and forestry soil are used for preparing nutrient soil and can be sold for external use. In the nutrient soil: the mass ratio of the agricultural soil to the humus soil is 60 parts (absolute dry), the mass ratio of the humus soil to the humus soil is 40 parts (absolute dry), and the mass ratio of the organic matter to the humus soil is 15 parts (absolute dry).
Example 2
In a solid waste treatment station in a certain area, the waste comprises 15 ten thousand tons of demolition waste, 55 ten thousand tons of decoration waste, 40 ten thousand tons of engineering residue soil, 10 ten thousand tons of slurry and 10 ten thousand tons of sludge.
Inorganic garbage such as demolition garbage, decoration garbage, engineering residue soil, mud, sludge and the like is crushed by a jaw crusher, magnetic separation is carried out by a magnetic separator to remove iron, light impurities are separated by a box type winnowing machine and a folded plate winnowing machine, brick and concrete separation is carried out by a near infrared light sorter, double-layer screen separation is carried out, and metal is recovered by vortex separation to obtain 10.4 ten thousand tons of combustible materials, 2100 tons of metal, 55.2 ten thousand tons of recycled aggregate, 44 ten thousand tons of residue soil, 1.5 ten thousand tons of mud cakes and 10 ten thousand tons of sludge.
The large garbage, garden garbage and forestry and agricultural residues are crushed by a crusher, screened to remove soil, and subjected to iron metal recovery by a magnetic separator to obtain 2.7 million tons of light impurities, 1500 tons of metal and 1500 tons of forestry and agricultural soil.
3.03 million tons of combustible enter the light impurity conversion and are cracked by the system to obtain combustible gas and cracked residues, and the combustible gas generates high-temperature flue gas at 1100 ℃ after being combusted and enters a ceramsite kiln to be fired into ceramsite. And (3) feeding 37 ten thousand tons (dry basis) of ceramsite raw materials into a ceramsite kiln, wherein the firing temperature is 1100 ℃, and the firing time is 0.5h. Wherein, the proportion of the ceramsite raw materials is as follows: 10 parts of dried sludge (oven-dried), 40 parts of dried slurry (oven-dried), 50 parts of residue soil (oven-dried), 6 parts of cracking residue (oven-dried) and 8 parts of ceramsite correcting material.
High-temperature flue gas at the outlet of the ceramsite kiln is purified by a lime desulfurization unit, air-supplementing and temperature-reducing are carried out to 550 ℃, the flue gas enters a product modification system for secondary utilization, the recycled aggregate is roasted and activated,
the recycled aggregate is separated out light aggregate (foam aggregate) and heavy aggregate (brick aggregate and concrete aggregate) by a box type winnowing machine, and the brick aggregate and the concrete aggregate are obtained after the heavy aggregate enters a near-infrared light separator. And (3) roasting the brick aggregate and the concrete aggregate at a high temperature of 550 ℃ for 60min, wherein the surfaces of the brick aggregate and the concrete aggregate are coated with mortar concrete, and the mortar concrete is sintered at a high temperature, so that the neck of the sintered concrete binder becomes brittle and falls off, thereby obtaining pure brick aggregate and concrete aggregate.
The surface of the recycled aggregate is coated with mortar concrete, and the mortar concrete is sintered at high temperature, so that the neck of the sintered concrete binder becomes brittle and falls off, thereby obtaining high-quality aggregate and active micro powder. And (4) desulfurizing the lime desulfurization unit to obtain dihydrate gypsum, and conveying the dihydrate gypsum to a desulfurization gypsum modification system.
And (3) supplementing air and cooling flue gas at the outlet of the product modification system to 110 ℃, utilizing the flue gas to dehydrate dihydrate gypsum in the desulfurization gypsum modification system, and dehydrating the dihydrate gypsum to obtain the hemihydrate gypsum. And residual gas enters a drying system for drying the mud cakes, and the dried mud cakes are obtained after the mud cakes are dried.
The humus soil and the agricultural and forestry soil are used for preparing nutrient soil and can be sold for sale. In the nutrient soil: the mass ratio of the agricultural soil to the dry soil is 50 parts (absolute dry), the mass ratio of the humus soil to the dry soil is 30 parts (absolute dry), and the mass ratio of the organic matter to the dry soil is 20 parts (absolute dry).
Claims (10)
1. The solid useless cooperative treatment of multisource and utilization system that gives up, its characterized in that includes:
the source control separation system is used for treating multi-source solid waste to obtain a primary product, wherein the primary product comprises primary recycled aggregate, recycled micro powder, muck, mud cakes, agricultural and forest soil, humus soil or organic matters, combustible matters and ceramsite correcting materials;
the energy conversion system is used for cracking the combustible materials after the combustible materials enter the energy conversion system to obtain combustible gas and cracking residues;
the energy cascade utilization and product modification coupling system enables the combustible gas and the flue gas with heat energy generated after the combustible gas is combusted to be subjected to cascade utilization in the energy cascade utilization and product modification coupling system and to be subjected to modification coupling with a primary product, so that ceramsite, gypsum with gelling activity, high-quality recycled aggregate and active micro powder are prepared.
2. The multi-source solid waste cooperative treatment and utilization method is characterized in that the multi-source solid waste cooperative treatment and utilization system of claim 1 is adopted and carried out by the following steps:
(1) The multi-source solid waste comprises construction waste and common multi-source solid waste, the multi-source solid waste is treated by a source control separation system to obtain a primary product, and the primary product comprises primary recycled aggregate, recycled micro powder, muck, mud cakes, agricultural and forest soil, humus soil or organic matter, combustible matter and ceramsite correcting material;
(2) After the combustible enters an energy conversion system for cracking, obtaining combustible gas and cracking residues;
(3) The flue gas with heat energy generated after the combustible gas and the combustible gas are combusted flows in the energy cascade utilization and product modification coupling system to carry out cascade utilization and product modification coupling production, and the cascade utilization of the flue gas with heat energy comprises the following steps:
A. the sludge cake is dried in a drying system to form a dried sludge cake, the dried sludge cake, residue soil, cracking residues and a ceramsite correction material are input into a ceramsite production system, and combustible gas is used for heating the ceramsite production system to obtain ceramsite and first gradient waste heat flue gas;
B. feeding the first gradient waste heat flue gas into a lime desulfurization unit for desulfurization to generate flue gas desulfurization gypsum, and roasting and activating the regenerated aggregate by adopting the desulfurized first gradient waste heat flue gas to obtain high-quality aggregate, active micro powder and second gradient waste heat flue gas;
C. heating and modifying the flue gas desulfurization gypsum by using the second gradient waste heat flue gas to obtain semi-hydrated gypsum and third gradient waste heat flue gas;
D. and heating the drying system by adopting the third gradient waste heat flue gas to enable the mud cake in the drying system to form a dried mud cake.
3. The multi-source solid waste synergistic treatment and utilization method according to claim 1, wherein the multi-source solid waste comprises construction waste and common multi-source solid waste and common industrial solid waste, and the mass ratio of the construction waste in the multi-source solid waste is more than 50%.
4. The multi-source solid waste cooperative treatment and utilization method according to claim 3, wherein the construction waste is one or more of demolition waste, decoration waste, engineering muck, engineering mud and engineering waste; the common multi-source solid waste is one or more of domestic waste, large-piece waste, garden waste, agricultural and forestry waste, sludge and silt; the common industrial solid waste is one or more of coal gangue and fly ash.
5. The multi-source solid waste synergistic treatment and utilization method according to claim 1, characterized in that the regenerated micro powder obtained in step (1), the flue gas output after heating in step D and the active micro powder obtained in step B are input into a carbon-fixing conversion utilization unit, the regenerated micro powder, the active micro powder and the flue gas are mixed, carbon is fixed by using carbon dioxide in the flue gas, and an active mineral admixture is obtained.
6. The multi-source solid waste synergistic treatment and utilization method according to claim 1, wherein the dried sludge cake in the ceramsite raw material comprises dried sludge and dried slurry, and the proportioning of the ceramsite raw material is as follows: 5-15 parts of dried sludge, 30-60 parts of dried slurry, 25-65 parts of residue soil, 5-10 parts of cracking residue and 5-15 parts of ceramsite correction material.
7. The multi-source solid waste synergistic treatment and utilization method according to claim 1, wherein the temperature of the flue gas with heat energy for heating the ceramsite production system is 800-1200 ℃.
8. The multi-source solid waste synergistic treatment and utilization method according to claim 1, characterized in that the temperature for roasting and activating the recycled aggregate is 400-800 ℃, and the roasting time is 20-120 min.
9. The multi-source solid waste synergistic treatment and utilization method according to claim 1, wherein the temperature of the second gradient waste heat flue gas is 100-200 ℃, and the temperature of the third gradient waste heat flue gas is 60-120 ℃.
10. The multi-source solid waste synergistic treatment and utilization method according to claim 1, wherein the agricultural and forestry soil, humus soil and organic matters in the primary product are used for preparing green nutrient soil, wherein the agricultural and forestry soil accounts for 30-70 parts, the humus soil accounts for 20-45 parts, and the organic matter accounts for 10-25 parts.
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| CN116441291B (en) * | 2023-06-16 | 2023-09-01 | 北京华宇辉煌生态环保科技股份有限公司 | Multi-source garbage cooperative treatment system and method |
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