CN110746070A - Biomass gas-carbon co-production coupling sludge deep treatment system and method - Google Patents
Biomass gas-carbon co-production coupling sludge deep treatment system and method Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
- C10J3/60—Processes
- C10J3/62—Processes with separate withdrawal of the distillation products
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/725—Redox processes
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0916—Biomass
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0956—Air or oxygen enriched air
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Abstract
The invention belongs to the technical field of efficient utilization of biomass energy and deep sludge treatment, and particularly relates to a biomass gas-carbon co-production coupling deep sludge treatment system and method. The disposal system comprises a biomass gasification furnace, a heat insulation combustion chamber, an air distribution chamber, a sludge drying machine, a sludge carbonizing machine and a tail gas treatment unit. The invention can effectively realize the co-production of combustible gas and biochar and the co-production of combustible gas and sludge carbon, realize the full coupling utilization of heat energy, realize the deep reduction, harmlessness and reclamation of sludge, and has low investment cost and obvious economic benefit and social benefit.
Description
Technical Field
The invention belongs to the technical field of efficient utilization of biomass energy and deep sludge treatment, and particularly relates to a biomass gas-carbon co-production coupling deep sludge treatment system and method.
Background
1. Background of sludge disposal
Sludge is a solid-liquid mixed waste pollutant and has great harm to the environment. With the development of social economy, the total sludge amount in China is increased rapidly, and the annual sludge yield is up to about 10000 million tons at present. The sludge harm is large, but the actual effective disposal rate is not high. The sludge is mainly divided into municipal sludge and industrial sludge according to different sources, which account for about half of the total amount, and the sludge from different sources has great difference in characteristics and disposal methods.
(1) Municipal sludge
Municipal sludge is mainly sourced from municipal sewage treatment plants, and the original water content of the municipal sludge is as high as 95-99%. With the increasing domestic water consumption of residents, the sewage treatment amount is increased, and as a derivative of sewage treatment, the sludge yield is increased year after year, and the consumption problem is increasingly prominent. In addition, the sludge is rich in pollutants in the sewage, contains a large amount of nutrient substances such as nitrogen and phosphorus, and toxic and harmful substances such as organic matters, virus microorganisms, parasitic ova and heavy metals, and can cause serious harm to the environment if not treated effectively. How to properly treat the sludge, so that the sludge is reduced, stabilized, harmless and recycled, and becomes a problem to be solved urgently in environmental pollution treatment.
The traditional sludge disposal mode mainly comprises landfill, incineration and land utilization, and as the sludge has higher water content and large volume, a plurality of problems exist in the practical application. The key to solve the problems is to reduce the water content of the sludge, dry the sludge and improve the heat value of the sludge.
Practice shows that the water content of the sludge after mechanical dehydration is still as high as about 65-80%, and in order to achieve deep dehydration of the sludge, an economical method is to carry out heat drying on the sludge, namely, most of water in the sludge is removed by using heat energy.
The heat drying modes mainly applied at present comprise traditional heat energy sludge drying and solar energy sludge drying. However, both drying modes suffer from problems in practical applications. In the traditional heat drying technology, because the disc drier has the advantages of large heat transfer area, good stirring effect, compact equipment structure, wide adaptability of sludge moisture content and the like, indirect drying of sludge by adopting the disc drier gradually becomes a mainstream sludge treatment mode, but because the sludge moisture content is higher (generally about 80%), if the sludge moisture content is reduced to be below 30%, the energy consumption of the drying process is very high (the process generally adopts steam as an energy source for heating and drying). The conventional mode that solar sludge in a glass room directly evaporates water is commonly adopted for drying the solar sludge at present, and the drying mode has low dehydration efficiency due to the problems of low illumination density, intermittence and continuous change of illumination direction and intensity along with time.
The current general treatment mode of municipal sludge is as follows: mechanical dehydration (reducing the water content to 65-80 percent, realizing reduction), dehydration by a drier (thermal drying, reducing the water content to 30-35 percent), reduction, incineration (complete reduction and harmlessness), and outward transportation of ash.
(2) Industrial sludge
Industrial sludge varies greatly depending on its source. These differences are mainly manifested in many aspects such as viscosity, hygroscopicity, pollutant properties, oil content, water content, organic matter proportion, inorganic matter proportion, etc. Compared with municipal sludge, the sludge has high viscosity, high oil content and high inorganic matter proportion, and the treatment difficulty is higher. Particularly, when the pollutants contain toxic and harmful substances such as heavy metals, the pollutants are classified as dangerous waste ranges, and the treatment means and standards have very strict requirements.
The following are several typical characteristics of industrial sludges.
Petrochemical sludge: the petrochemical sludge has complex components and contains different types of heavy metals, the general petroleum sludge has high oil content, high viscosity and high water content which is generally up to 96-99 percent, and the petroleum sludge still has 70-85 percent after mechanical dehydration, larger volume and mass, small organic matter content and lower heat value.
Printing and dyeing sludge: the sludge produced by printing and dyeing is large, the total sludge accounts for 0.3-1.0 percent of the total volume of sewage, the water content is high and generally reaches 96-99 percent, 55-85 percent of the total sludge is still remained after mechanical dehydration, the volume and the quality are also large, the printing and dyeing sludge generally has higher inert substances, less organic matters, pathogenic bacteria and the like, lower heat value and generally high heavy metal content.
Papermaking sludge: the ash content of the papermaking sludge is larger and can generally reach 50% -70%, so the heat value is lower, the water content is high and generally reaches 95% -99%, even after dehydration, the water content is still 60% -80%, the sludge content is larger, and a large amount of fibers are contained in the sludge.
Preparing leather-making sludge: the mud yield of the leather-making industry is large, 40-80 tons of sludge/ten thousand tons of wastewater can be produced in each day generally, the organic matter content is high, and because a large amount of fur and bloody stain are produced in the leather treatment process, the organic matter content is very high, a large amount of toxic substances are produced, and S is2-And high content of trivalent chromium, and carcinogenic effect after the trivalent chromium is converted into hexavalent chromium.
Electroplating sludge: the electroplating sludge contains cyanide and heavy metals such as hexavalent chromium, copper, zinc, cadmium, nickel and the like, the electroplating wastewater treated by a chemical method is a main source for generating the sludge, and the electroplating sludge has low organic matter content and small heat value.
The components and characteristics of the industrial sludge depend on specific industrial production sections, the sludge in different industries is very different, and the municipal sludge experience cannot be simply used for treating the industrial sludge. However, in the reduction process, the sludge with high water content is dried to reduce the water content. The industrial sludge after reduction needs to adopt different treatment standards and methods according to whether the industrial sludge is classified as dangerous waste or not.
① has high energy consumption and high energy cost, most of the prior sludge treatment technologies adopt industrial steam as a drying heat source, the energy consumption is high, the operation cost is high, ② reduction is not thorough, the sludge is generally dried to 30 to 35 percent of water content and is transported outside, the volume is still large, ③ treatment process pollutes the environment, high humidity waste gas evaporated in the sludge drying process carries various pollutants, the treatment difficulty is large, the treatment difficulty of waste water generated after the gas is condensed is also large, in addition, when the dried sludge adopts an incineration treatment mode, the flue gas generated by incineration also causes atmospheric pollution, ④ investment cost is large, and the movable sludge drying part faces serious abrasion and corrosion problems, has high requirements on materials, and therefore, the equipment investment is also high.
2. Background of comprehensive utilization of biomass
(1) Concept of biomass energy
Biomass energy is the energy stored in biomass by green plants that convert solar energy to chemical energy, and generally includes: the waste of timber and forest industry, agricultural waste, living organic waste, aquatic plant and oil plant. The world energy consumption is second to the fourth of the three major fossil energy ranks, and accounts for 14 percent. According to the statistical data, in 2009, the consumption of the biomass energy of the european union accounts for about 6% of the total energy consumption of the european union, the utilization of the biomass energy of the united states accounts for 4% of the total energy consumption of the country, and the sweden accounts for 32%. China is a big agricultural country, biomass resources are rich, biomass energy accounts for 20% of the total energy consumption, more than 65% of the total rural energy consumption is biomass energy, and the salary consumption accounts for about 29% of the total energy consumption.
The biomass energy source is an ideal renewable energy source and has the characteristics of ① renewability, ② low pollution (low sulfur content and nitrogen content of biomass and SO generated in the combustion process)2、NOxLow carbon dioxide emission amount is approximately zero when biomass is used as fuel, greenhouse effect can be effectively reduced), ③ wide distribution is achieved, biomass energy can be fully utilized in areas lacking coal, and the heat value of typical biomass is 17600-22600 kJ/kg.
(2) Biomass energy utilization mode and status quo
At present, the main application modes of biomass energy are divided into ① direct combustion and ② biomass gasification.
The direct biomass combustion mode is a traditional energy utilization mode, namely a mode that biomass is fully combusted in a combustion furnace, and the released heat is used for power generation or heat supply. The direct combustion method is generally used for large-scale centralized utilization, such as the existing mainstream biomass power plant.
Biomass gasification is a newer approach: under certain thermodynamic conditions in a gasification furnace, biomass is incompletely combusted under the condition of only providing limited oxygen, and CO and H are generated through organic matter thermal cracking and a series of oxidation-reduction reactions2And low molecular hydrocarbons and the like. The combustible gas is a clean and clean green energy source and can be used for subsequent heat supply or power generation. The gasification of biomass has certain requirements on raw materials, and generally uses medium and small-scale utilization as main materials, such as heat supply in factories or parks, material drying, heat preservation and moisture preservation and the like. In addition, the thermal cracking and the oxidation reduction degree can be adjusted by controlling the reaction temperature, the gasifying agent and the like in the biomass gasification process, so that combustible gas is obtained, and byproducts such as biomass charcoal, tar, pyroligneous liquor and the like are obtained. Particularly, the biomass charcoal is a product with higher quality and high added value at present, and is widely applied to the occasions of heat insulation materials, soil improvement, fuels, adsorbents and the like.
The differences between gasification and combustion processes:
the combustion process provides sufficient air or oxygen, the raw materials are fully combusted, the purpose is to directly obtain heat, and the product is CO2And non-combustible flue gas such as water.
The gasification process only supplies the part of oxygen required by thermochemical reaction, and energy is kept in the combustible gas obtained after the reaction as much as possible, and the gasified product is combustible gas containing hydrogen, CO and low molecular hydrocarbon. As in the following table:
(3) principle of biomass gasification
Biomass gasification is a thermochemical conversion technology, and utilizes air, oxygen or steam as a gasifying agent to convert biomass into combustible gas. The biomass gasification can convert low-grade solid biomass into high-grade combustible gas, and can be applied to centralized gas supply, heat supply, power generation, chemicals, raw gas and the like.
FIG. 1 is a schematic view of an updraft fixed bed gasification furnace in which biomass is fed from the top, a gasifying agent is blown in from the bottom, and a generated gas is discharged from the top. The biomass reacted in the gasification furnace is divided into a drying layer, a thermal decomposition layer, a reduction layer and an oxidation layer from top to bottom.
The wet material added from the upper part exchanges heat with the hot gas generated in the lower reaction layer in the drying layer to become dry material which falls into the thermal decomposition layer, and the generated steam is discharged out of the gasification furnace. The temperature of the drying layer is 100-250 ℃.
The biomass is subjected to cracking reaction after being subjected to hot gas generated by the oxidation layer and the reduction layer, most of volatile matters are separated from the solid, and the temperature of the thermal decomposition layer is reduced to 400-600 ℃ due to the fact that a large amount of heat is needed for cracking. The products of the cracking zone are carbon, hydrogen, water vapor, carbon monoxide, carbon dioxide, methane, tar and other hydrocarbon substances, the hot gases continuously rise, and the carbon enters the lower reduction zone.
The reduction layer has no oxygen, and carbon dioxide generated in the oxidation layer is subjected to reduction reaction with carbon and water vapor to generate carbon monoxide and hydrogen. The main equation is as follows:
C+CO2＝2CO+ΔH； ΔH＝-162.41kJ
H2O+C＝CO+H2+ΔH； ΔH＝-118.82kJ
2H2O+C＝CO2+2H2+ΔH； ΔH＝-75.24kJ
H2O+CO＝CO2+H2+ΔH； ΔH＝-43.58kJ
because the reduction reaction absorbs heat, the temperature of the reduction zone is also reduced to 700-900 ℃. The main products of the reduction zone are carbon monoxide, carbon dioxide and hydrogen.
The gasifying agent enters from the bottom, exchanges heat with hot ash when passing through an ash layer, enters an oxidation layer to perform combustion reaction with hot carbon to generate carbon dioxide and carbon monoxide, and simultaneously emits heat. The temperature can reach 1000-1200 ℃, and the heat carrier is rising gas.
In principle, biomass gasification and biomass direct combustion are both reactions of organic matter with oxygen. However, sufficient oxygen is provided during the combustion process, and the product of the combustion is CO2And water and other non-combustible smoke gas, and a large amount of reaction heat is released, namely the combustion mainly converts the chemical energy of the raw materials into heat energy. The biomass gasification process is an incomplete reaction which occurs in an anoxic environment and is an endothermic reaction as a whole, and the gasification products can be further combusted.
At present, although some enterprises begin to explore the utilization of heat energy generated by biomass gasification technology to treat sludge so as to realize resource utilization, the biomass is completely gasified into combustible gas and then is limited by the temperature and the amount of hot air, so that a plurality of technical problems exist in the aspects of gas-carbon co-production and sludge drying utilization, and the method cannot be practically popularized and applied.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a biomass gas-carbon co-production coupling sludge deep treatment system which can effectively realize co-production of combustible gas and biological carbon and co-production of combustible gas and sludge-carbon, realizes full coupling utilization of heat energy and has remarkable economic and social benefits.
In order to achieve the technical purpose, the invention adopts the following technical scheme: biomass gas charcoal coproduction coupling mud degree of depth processing system includes:
the biomass gasification furnace is used for gasifying biomass, obtaining biomass fuel gas and recycling biomass charcoal;
the heat insulation combustion chamber is used for receiving biomass fuel gas discharged by the biomass gasification furnace and combusting the biomass fuel gas to generate high-temperature flue gas A1;
a sludge drier, drying the wet sludge by using a heat source B1 to obtain dried sludge;
the sludge carbonizing machine is used for carrying out carbonization and cracking reaction on the dried sludge by utilizing a heat source B2 to obtain combustible gas and sludge carbon and discharging high-temperature flue gas A2;
and the air distribution chamber is used for adjusting the temperature of high-temperature flue gas A1 discharged from the heat insulation combustion chamber or high-temperature flue gas A2 discharged from the sludge carbonizing machine, and the flue gas adjusted to the proper temperature through the air distribution chamber is used as a heat source B1 of the sludge drying machine.
As a preferable technical scheme, the sludge drying machine further comprises a tail gas treatment unit for treating tail gas discharged by the sludge drying machine.
The invention also provides a disposal method of the biomass gas-carbon co-production coupling sludge deep disposal system, which can be realized by adopting three schemes according to the heat source flow direction of sludge disposal:
as one of the technical schemes, the treatment method of the biomass gas-carbon co-production coupling sludge deep treatment system comprises the following steps:
firstly, biomass (mainly comprising rice hulls, bamboo chips, sawdust, straws, corncobs and other agricultural and forestry wastes) is subjected to simple pretreatment, enters a biomass gasification furnace through a feeding system, and is subjected to oxidation-reduction reaction with a small amount of air added together, and the generated energy keeps the system in a stable reaction state, so that the volatile matters in the biomass are promoted to be pyrolyzed to generate biomass gas; meanwhile, biomass charcoal after biomass gasification is discharged out of the gasification furnace through a charcoal cooling screw conveyor, and is conveyed to a charcoal warehouse through a charcoal conveying system for collection, packaging and recovery;
step two, the biomass fuel gas at the outlet of the biomass gasification furnace is about 300-;
thirdly, a part of high-temperature flue gas A1 generated by the heat insulation combustion chamber enters an air distribution chamber, the high-temperature flue gas is adjusted to a proper temperature by the air distribution chamber and then is used as a heat source B1 of the sludge drying machine, hot air enters the sludge drying machine, and moisture in the sludge is evaporated by utilizing the heat energy of the hot air, so that the moisture content of the sludge is reduced from 80% of the moisture content of an inlet to 30-35% of the moisture content of an outlet; conveying the dried sludge to a sludge carbonizing machine through equipment such as a screw conveyor and the like; the mixed gas C (about 90 ℃) of the dried flue gas and the steam evaporated from the sludge is discharged after the pollutants treated by the tail gas treatment unit reach the standard;
the other part of the high-temperature flue gas A1 generated by the adiabatic combustion chamber directly enters the sludge carbonizing machine in a high-temperature state (about 800 ℃) to be used as a heat source B2 of the sludge carbonizing machine; the high-temperature flue gas entering the sludge carbonizing machine and the dried sludge conveyed from the sludge drying machine are subjected to heat transfer in the sludge carbonizing machine to enable the sludge to be subjected to carbonization reaction, most of volatile components in the sludge are released and subjected to cracking reaction to generate combustible gas, and residual carbon after cracking and original fixed carbon, ash and other non-volatile parts in the sludge form a solid part, namely sludge carbon, of a carbonization product; discharging the sludge carbon out of the carbonizing machine through a carbon cooling screw conveyor, conveying the sludge carbon to a carbon warehouse through a carbon conveying system, collecting, packaging and recycling;
and step four, recycling combustible gas generated by the sludge carbonizing machine to the heat insulation combustion chamber as fuel supplement, and recycling high-temperature flue gas A1 discharged after the high-temperature flue gas A2 is utilized by the sludge carbonizing machine to the air distribution chamber to realize energy recovery and tail gas unified treatment.
As a second technical scheme, the treatment method of the biomass gas-carbon co-production coupling sludge deep treatment system comprises the following steps:
firstly, biomass (mainly comprising rice hulls, bamboo chips, sawdust, straws, corncobs and other agricultural and forestry wastes) is subjected to simple pretreatment, enters a biomass gasification furnace through a feeding system, and is subjected to oxidation-reduction reaction with a small amount of air added together, and the generated energy keeps the system in a stable reaction state, so that the volatile matters in the biomass are promoted to be pyrolyzed to generate biomass gas; meanwhile, biomass charcoal after biomass gasification is discharged out of the gasification furnace through a charcoal cooling screw conveyor, and is conveyed to a charcoal warehouse through a charcoal conveying system for collection, packaging and recovery;
step two, the biomass fuel gas at the outlet of the biomass gasification furnace is about 300-;
step three, all the high-temperature flue gas A1 generated by the adiabatic combustion chamber enters a sludge carbonizing machine to be used as a heat source B2 of the sludge carbonizing machine, the high-temperature flue gas entering the sludge carbonizing machine and dried sludge conveyed from a sludge drying machine are subjected to heat transfer in the sludge carbonizing machine to enable the sludge to be subjected to carbonization reaction, most of volatile components in the sludge are released and subjected to cracking reaction to generate combustible gas, and part of residual carbon after cracking and original fixed carbon, ash and other non-volatile parts in the sludge form a solid part of a carbonized product, namely sludge carbon; discharging the sludge carbon out of the carbonizing machine through a carbon cooling screw conveyor, conveying the sludge carbon to a carbon warehouse through a carbon conveying system, collecting, packaging and recycling;
step four, recycling combustible gas generated by the sludge carbonizing machine to the heat insulation combustion chamber to be used as fuel for supplement, adjusting the high-temperature flue gas A2 exhausted after the high-temperature flue gas A1 is utilized by the sludge carbonizing machine to a proper temperature through the air distribution chamber to be used as a heat source B1 of the sludge drying machine, and enabling hot air to enter the sludge drying machine to evaporate water in the sludge by utilizing the heat energy of the hot air so that the water content of the sludge is reduced from 80% of the water content of an inlet to 30-35% of the water content of an outlet; conveying the dried sludge to a sludge carbonizing machine through equipment such as a screw conveyor and the like; the mixed gas C (about 90 ℃) of the dried flue gas and the water vapor evaporated from the sludge is discharged after the pollutants are treated by the tail gas treatment unit and reach the standard.
As a third technical scheme, the treatment method of the biomass gas-carbon co-production coupling sludge deep treatment system comprises the following steps:
firstly, biomass (mainly comprising rice hulls, bamboo chips, sawdust, straws, corncobs and other agricultural and forestry wastes) is subjected to simple pretreatment, enters a biomass gasification furnace through a feeding system, and is subjected to oxidation-reduction reaction with a small amount of air added together, and the generated energy keeps the system in a stable reaction state, so that the volatile matters in the biomass are promoted to be pyrolyzed to generate biomass gas; meanwhile, biomass charcoal after biomass gasification is discharged out of the gasification furnace through a charcoal cooling screw conveyor, and is conveyed to a charcoal warehouse through a charcoal conveying system for collection, packaging and recovery;
step two, the biomass fuel gas at the outlet of the biomass gasification furnace is about 300-;
step three, all high-temperature flue gas A1 generated by the heat insulation combustion chamber enters the air distribution chamber, and is adjusted to a proper temperature by the air distribution chamber to be used as a heat source B1 of the sludge drier; the hot air enters the sludge drier and evaporates the water in the sludge by utilizing the heat energy of the hot air, so that the water content of the sludge is reduced from 80 percent of the water content of the inlet to 30 to 35 percent of the water content of the outlet; conveying the dried sludge to a sludge carbonizing machine through equipment such as a screw conveyor and the like; the mixed gas C (about 90 ℃) of the dried flue gas and the steam evaporated from the sludge is discharged after the pollutants treated by the tail gas treatment unit reach the standard;
step four, the sludge carbonizing machine is connected with a burner, and a heat source B2 required by the carbonization reaction of the sludge carbonizing machine is independently supplied by the burner through combustion of combustible gas in the carbonization process; the residual carbon after cracking and the original fixed carbon, ash and other non-volatile parts in the sludge form a solid part of a carbonized product, namely sludge carbon; discharging the sludge carbon out of the carbonizing machine through a carbon cooling screw conveyor, conveying the sludge carbon to a carbon warehouse through a carbon conveying system, collecting, packaging and recycling; high-temperature flue gas A2 discharged by the sludge carbonizing machine is recycled to the air distribution chamber to realize energy recovery and tail gas unified treatment.
Wherein, a part of the mixed gas C exhausted by the sludge drier is preferably led out to enter the adiabatic combustion chamber or the air distribution chamber as air distribution, so that on one hand, the tail gas amount can be reduced, and simultaneously, the heat of the part of tail gas can be recycled.
Due to the adoption of the technical scheme, the invention has at least the following beneficial effects:
(1) the system has reasonable design, low operation energy consumption and low operation cost.
The energy of biomass gas generated by biomass gasification is utilized, the biomass gas is combusted and heated through the heat insulation combustion chamber, air is reasonably distributed through the air distribution chamber and then is supplied to a sludge drying and carbonizing working section, and meanwhile, the recycling of pyrolysis combustible gas generated by sludge drying and carbonizing is also considered, so that the energy-saving effect is realized to the maximum extent, and the energy consumption and the operation cost are lower; meanwhile, the problem that the biomass is easily limited by the temperature and the amount of hot air after being gasified into combustible gas is solved.
(2) Realizing the deep reduction, harmlessness and reclamation of the sludge.
The reduction is represented by: the water content of the dried and carbonized sludge is almost reduced to 0, and the sludge reduction can reach more than 85 percent (based on 80 percent of water content of the original sludge).
The harmless treatment is embodied in that: harmful components in the sludge are fixed in the product carbon, the final product particle size is 1-5mm, the particles are stable in property, and heavy metals are solidified and do not enter organisms to circulate any more.
The resource is represented as follows: the solid product, namely the sludge carbon, in the sludge carbonization process is odorless and porous, can be used for soil improvement, landscaping, building material materials, energy particles (part of replaceable coal energy) and the like, and can be recycled.
(3) Realizing the resource utilization of the biomass.
The solid product, namely biomass carbon, in the biomass gasification process is a product with higher quality and high added value at present, and is widely applied to the fields of heat insulation materials, soil improvement, fuels, adsorbents and the like. The gaseous product, biomass fuel gas, can provide the energy required by the deep treatment of the sludge.
(4) Low investment cost and remarkable economic benefit.
The main equipment of the system has no special material requirement, the investment cost is low, the biomass source of the main raw material is wide, and local materials can be considered. The project can obtain good economic benefits through sludge disposal cost income, biomass carbon sale and sludge carbon sale.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1 is a schematic view of an updraft fixed bed gasification furnace;
FIG. 2 is a schematic diagram of the operation of the system according to the first embodiment of the present invention;
FIG. 3 is a schematic diagram of the operation of the system according to the second embodiment of the present invention;
fig. 4 is a schematic diagram of the operation of the system according to the third embodiment of the present invention.
Detailed Description
The invention is further illustrated below with reference to the figures and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 2 to 4, the system for deep treatment of sludge by co-production and coupling of biomass gas and carbon can efficiently use biomass energy to dry and carbonize sludge on site, and comprises a biomass gasifier 1, a heat insulation combustion chamber 2, an air distribution chamber 3, a sludge drier 4, a sludge carbonizing machine 5 and a tail gas treatment unit 6; wherein:
the biomass gasification furnace 1 is used for gasifying biomass to obtain biomass fuel gas (about 300 ℃ C. and 400 ℃ C.), and recovering biomass charcoal after biomass gasification;
the heat insulation combustion chamber 2 is used for receiving the biomass fuel gas discharged by the biomass gasification furnace 1 and combusting the biomass fuel gas to generate high-temperature flue gas A1 (about 800 ℃ -;
the sludge drier 4 is used for drying wet sludge () by utilizing a heat source B1 to obtain dried sludge with the water content of 30-35%;
the sludge carbonizing machine 5 is used for carrying out carbonization and cracking reaction on the dried sludge by utilizing a heat source B2 to obtain combustible gas and sludge carbon, and discharging high-temperature flue gas A2;
the air distribution chamber 3 is used for adjusting the temperature of high-temperature flue gas A1 discharged from the heat insulation combustion chamber 2 or high-temperature flue gas A2 discharged from the sludge carbonizing machine 5, and the flue gas adjusted to the proper temperature through the air distribution chamber is used as a heat source B1 of the sludge drying machine 4;
and the tail gas treatment unit 6 is used for treating tail gas discharged by the sludge drier 4.
According to the heat source flow direction of sludge treatment, biomass gas carbon co-production coupled sludge deep treatment can be realized by adopting three schemes described in examples 1 to 3.
Example 1
Referring to fig. 2, the treatment method of the biomass gas-carbon co-production coupling sludge advanced treatment system comprises the following steps:
firstly, biomass (mainly comprising rice hulls, bamboo chips, sawdust, straws, corncobs and other agricultural and forestry wastes) is subjected to simple pretreatment, enters a biomass gasification furnace 1 through a feeding system, and is subjected to oxidation-reduction reaction with a small amount of air added together, and the generated energy keeps the system in a stable reaction state, so that the volatile matters in the biomass are promoted to be pyrolyzed to generate biomass gas; meanwhile, biomass charcoal after biomass gasification is discharged out of the gasification furnace through a charcoal cooling screw conveyor, and is conveyed to a charcoal warehouse through a charcoal conveying system for collection, packaging and recovery; by reasonably designing the diameter, the height and accessory equipment of the gasification furnace, the excellent gasification conditions in the furnace and the retention time of raw materials in the furnace are ensured, and the high-efficiency conversion of biomass is realized;
step two, the biomass fuel gas at the outlet of the biomass gasification furnace 1 is about 300-400 ℃, is pressurized by a fan and then is sent into the adiabatic combustion chamber 2 to be combusted to generate high-temperature flue gas A1 at 800-1000 ℃ for use in a subsequent sludge treatment section, and the adiabatic combustion chamber 2 adjusts the flue gas temperature and controls the generation of pollutants (mainly nitrogen oxides) in the combustion process through reasonable air distribution;
the deep treatment of the sludge needs to be divided into two sections: drying and carbonizing. Taking the mud with 80% water content as an example, the evaporation of water is firstly realized at a lower temperature (below about 200 ℃), and the mud is dried to a state with 30% -35% water content. The dried sludge needs to be carbonized at a higher temperature (about 800 ℃), and the water content of the carbonized sludge is basically 0. Therefore, the high-temperature flue gas A1 generated by the gasification of the biomass needs to be divided into two sections for utilization (see step three);
thirdly, part of high-temperature flue gas A1 generated by the heat insulation combustion chamber enters an air distribution chamber 3, and is adjusted to a proper temperature by the air distribution chamber 3 to be used as a heat source B1 of a sludge drier 4; the temperature of the hot air at the outlet is controlled by controlling reasonable air distribution to meet the requirement of sludge drying, different temperatures of the hot air are generally selected according to the type of the sludge drying machine 4, and the temperature of the selected hot air is about 150 ℃ plus 200 ℃ taking a direct contact type drum-type drying machine for the example of the hot air sludge; the hot air enters the sludge drier 4, and the moisture in the sludge is evaporated by utilizing the heat energy of the hot air, so that the moisture content of the sludge is reduced from 80 percent of the moisture content of the inlet to 30 to 35 percent of the moisture content of the outlet; a uniform material distributing and crushing device is arranged in the sludge drying machine to prevent sludge from being bonded and agglomerated; conveying the dried sludge to a sludge carbonizing machine 5 through equipment such as a screw conveyor and the like; the mixed gas C (about 90 ℃) of the dried flue gas and the steam evaporated from the sludge is discharged after the pollutants treated by the tail gas treatment unit 6 reach the standard; in order to reduce the amount of tail gas and recover the heat of the part of tail gas, a part of tail gas is preferably led out and enters the heat insulation combustion chamber 2 or the air distribution chamber 3 as air distribution;
the other part of the high-temperature flue gas A1 generated by the adiabatic combustion chamber directly enters the sludge carbonizing machine 5 in a high-temperature state (about 800 ℃) to be used as a heat source B2 of the sludge carbonizing machine; the high-temperature flue gas entering the sludge carbonizing machine and the dried sludge conveyed from the sludge drying machine 4 are subjected to heat transfer in the sludge carbonizing machine 5 so as to enable the sludge to generate carbonization reaction; the heating mode of the carbonizing machine is generally indirect heating, and the carbonization reaction process of the sludge mainly comprises the following steps: in the range of about 300 ℃ to 700 ℃; most of volatile components in the sludge are released and subjected to cracking reaction to generate combustible gas consisting of hydrogen, carbon monoxide, methane and other hydrocarbon substances, and the like, wherein partial residual carbon after cracking and original fixed carbon, ash and other non-volatile parts in the sludge form a solid part of a carbonized product, namely sludge carbon; discharging the sludge carbon out of the carbonizing machine through a carbon cooling screw conveyor, conveying the sludge carbon to a carbon warehouse through a carbon conveying system, collecting, packaging and recycling;
and step four, the combustible gas generated by the sludge carbonizing machine 5 is recycled to the heat insulation combustion chamber 2 to be used as fuel for supplement, and the high-temperature flue gas A2 discharged after the high-temperature flue gas A1 is utilized by the sludge carbonizing machine is recycled to the air distribution chamber 3 to realize energy recovery and tail gas unified treatment.
The scheme is that the sludge carbonizing machine and the sludge drying machine are arranged in parallel when the flow direction of hot flue gas is seen.
Example 2
The present embodiment is basically the same as embodiment 1 in terms of structural principle, and is different in that:
referring to fig. 3, in this embodiment, all of the high-temperature flue gas a1 generated by the adiabatic combustion chamber 2 enters the sludge carbonizing machine 5, heat is transferred in the carbonizing machine to cause a carbonization reaction of the sludge, the flue gas discharged from the carbonizing machine still has a high temperature, and the flue gas enters the sludge drying machine as a heat source after being adjusted to a suitable temperature by the air distribution chamber 3, so that the sludge is dried from about 80% water content to about 35% water content.
The scheme is that a sludge carbonizing machine and a sludge drying machine are arranged in series when the flow direction of hot flue gas is seen.
Example 3
The present embodiment is basically the same as embodiment 1 in terms of structural principle, and is different in that:
referring to fig. 4, in this embodiment, the high-temperature flue gas a1 at the outlet of the adiabatic combustion chamber 2 entirely enters the air distribution chamber 3, and after being adjusted to a suitable temperature by the air distribution chamber 3, the high-temperature flue gas enters the sludge drier 4 as a heat source to dry the sludge from about 80% water content to about 35% water content. The dried sludge enters a sludge carbonizing machine 5, heat required by carbonization reaction of the sludge in the carbonizing machine is supplied by combustion of a burner 7 by virtue of combustible gas in the carbonization process, and energy balance of self carbonization is realized.
According to the flow direction of the hot flue gas, the scheme is that the hot flue gas does not participate in a sludge carbonization working section, and a sludge carbonization machine operates independently.
As can be seen from examples 1 to 3, the present invention has the following effects:
(1) the energy of biomass gas generated by biomass gasification is utilized, the biomass gas is combusted and heated through the heat insulation combustion chamber, air is reasonably distributed through the air distribution chamber and then is supplied to a sludge drying and carbonizing working section, and meanwhile, the recycling of pyrolysis combustible gas generated by sludge drying and carbonizing is also considered, so that the energy-saving effect is realized to the maximum extent, and the energy consumption and the operation cost are lower; meanwhile, the problem that the biomass is easily limited by the temperature and the amount of hot air after being gasified into combustible gas is solved.
(2) The water content of the dried and carbonized sludge is almost reduced to 0, and the sludge reduction can reach more than 85 percent (based on 80 percent of water content of the original sludge); harmful components in the sludge are fixed in the product carbon, the final product particle size is 1-5mm, the particles are stable in property, and heavy metals are solidified and do not enter organisms to circulate any more. The solid product, namely sludge carbon, in the sludge carbonization process is odorless and porous, can be used for soil improvement, landscaping, building material materials, energy particles (part of coal energy can be replaced) and the like, and can be recycled; thus realizing the deep reduction, harmlessness and reclamation of the sludge.
(3) The solid product in the biomass gasification process, namely biomass carbon, is a product with higher quality and high added value at present, and is widely applied to the occasions of heat insulation materials, soil improvement, fuels, adsorbents and the like; the gaseous product, namely biomass gas, can provide energy required by deep sludge treatment; namely realizing the resource utilization of the biomass.
(4) The main equipment of the system has no special material requirement, the investment cost is low, the biomass source of the main raw material is wide, and local materials can be considered. The project can obtain good economic benefits through sludge disposal cost income, biomass carbon sale and sludge carbon sale.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention shall fall within the protection scope of the invention.
Claims (6)
1. Biomass gas charcoal coproduction coupling mud degree of depth processing system, its characterized in that includes:
the biomass gasification furnace is used for gasifying biomass, obtaining biomass fuel gas and recycling biomass charcoal;
the heat insulation combustion chamber is used for receiving biomass fuel gas discharged by the biomass gasification furnace and combusting the biomass fuel gas to generate high-temperature flue gas A1;
a sludge drier, drying the wet sludge by using a heat source B1 to obtain dried sludge;
the sludge carbonizing machine is used for carrying out carbonization and cracking reaction on the dried sludge by utilizing a heat source B2 to obtain combustible gas and sludge carbon and discharging high-temperature flue gas A2;
and the air distribution chamber is used for adjusting the temperature of high-temperature flue gas A1 discharged from the heat insulation combustion chamber or high-temperature flue gas A2 discharged from the sludge carbonizing machine, and the flue gas adjusted to the proper temperature through the air distribution chamber is used as a heat source B1 of the sludge drying machine.
2. The biomass gas carbon co-production coupling sludge deep treatment system of claim 1, characterized in that: the sludge drying machine also comprises a tail gas treatment unit for treating tail gas discharged by the sludge drying machine.
3. The disposal method of the biogas-carbon co-production coupled sludge advanced disposal system as claimed in claim 2, characterized by comprising the following steps:
after simple pretreatment, biomass enters a biomass gasification furnace through a feeding system and undergoes an oxidation-reduction reaction with a small amount of air added together, and the generated energy keeps the system in a stable reaction state to promote the pyrolysis of volatile matters in the biomass to generate biomass fuel gas; meanwhile, biomass charcoal after biomass gasification is discharged out of the gasification furnace through a charcoal cooling screw conveyor, and is conveyed to a charcoal warehouse through a charcoal conveying system for collection, packaging and recovery;
step two, the biomass fuel gas at the outlet of the biomass gasification furnace is pressurized by a fan and then is sent into a heat insulation combustion chamber to be combusted to generate high-temperature flue gas A1 with the temperature of 800-;
thirdly, a part of high-temperature flue gas A1 generated by the heat insulation combustion chamber enters an air distribution chamber, the high-temperature flue gas is adjusted to a proper temperature by the air distribution chamber and then is used as a heat source B1 of the sludge drying machine, hot air enters the sludge drying machine, and moisture in the sludge is evaporated by utilizing the heat energy of the hot air, so that the moisture content of the sludge is reduced from 80% of the moisture content of an inlet to 30-35% of the moisture content of an outlet; conveying the dried sludge to a sludge carbonizing machine; the mixed gas C of the dried flue gas and the water vapor evaporated from the sludge is discharged after the pollutants are treated by the tail gas treatment unit and reach the standard;
the other part of the high-temperature flue gas A1 generated by the adiabatic combustion chamber directly enters a sludge carbonizing machine in a high-temperature state to be used as a heat source B2 of the sludge carbonizing machine; the high-temperature flue gas entering the sludge carbonizing machine and the dried sludge conveyed from the sludge drying machine are subjected to heat transfer in the sludge carbonizing machine to enable the sludge to be subjected to carbonization reaction, most of volatile components in the sludge are released and subjected to cracking reaction to generate combustible gas, and residual carbon after cracking and original fixed carbon and non-volatile components in the sludge form sludge carbon together; discharging the sludge carbon out of the carbonizing machine through a carbon cooling screw conveyor, conveying the sludge carbon to a carbon warehouse through a carbon conveying system, collecting, packaging and recycling;
and step four, recycling combustible gas generated by the sludge carbonizing machine to the heat insulation combustion chamber as fuel supplement, and recycling high-temperature flue gas A1 discharged after the high-temperature flue gas A2 is utilized by the sludge carbonizing machine to the air distribution chamber to realize energy recovery and tail gas unified treatment.
4. The disposal method of the biogas-carbon co-production coupled sludge advanced disposal system as claimed in claim 2, characterized by comprising the following steps:
after simple pretreatment, biomass enters a biomass gasification furnace through a feeding system and undergoes an oxidation-reduction reaction with a small amount of air added together, and the generated energy keeps the system in a stable reaction state to promote the pyrolysis of volatile matters in the biomass to generate biomass fuel gas; meanwhile, biomass charcoal after biomass gasification is discharged out of the gasification furnace through a charcoal cooling screw conveyor, and is conveyed to a charcoal warehouse through a charcoal conveying system for collection, packaging and recovery;
step two, the biomass fuel gas at the outlet of the biomass gasification furnace is pressurized by a fan and then is sent into a heat insulation combustion chamber to be combusted to generate high-temperature flue gas A1 with the temperature of 800-;
step three, all the high-temperature flue gas A1 generated by the adiabatic combustion chamber enters a sludge carbonizing machine to be used as a heat source B2 of the sludge carbonizing machine, the high-temperature flue gas entering the sludge carbonizing machine and dried sludge conveyed from a sludge drying machine are subjected to heat transfer in the sludge carbonizing machine to enable the sludge to be subjected to carbonization reaction, most of volatile components in the sludge are released and subjected to cracking reaction to generate combustible gas, and part of residual carbon after cracking and original fixed carbon and non-volatile part in the sludge form sludge carbon together; discharging the sludge carbon out of the carbonizing machine through a carbon cooling screw conveyor, conveying the sludge carbon to a carbon warehouse through a carbon conveying system, collecting, packaging and recycling;
step four, recycling combustible gas generated by the sludge carbonizing machine to the heat insulation combustion chamber to be used as fuel for supplement, adjusting the high-temperature flue gas A2 exhausted after the high-temperature flue gas A1 is utilized by the sludge carbonizing machine to a proper temperature through the air distribution chamber to be used as a heat source B1 of the sludge drying machine, and enabling hot air to enter the sludge drying machine to evaporate water in the sludge by utilizing the heat energy of the hot air so that the water content of the sludge is reduced from 80% of the water content of an inlet to 30-35% of the water content of an outlet; conveying the dried sludge to a sludge carbonizing machine; and (3) treating pollutants by using a tail gas treatment unit to reach the standard, and then discharging the mixed gas C of the dried flue gas and the steam evaporated from the sludge.
5. The disposal method of the biogas-carbon co-production coupled sludge advanced disposal system as claimed in claim 2, characterized by comprising the following steps:
after simple pretreatment, biomass enters a biomass gasification furnace through a feeding system and undergoes an oxidation-reduction reaction with a small amount of air added together, and the generated energy keeps the system in a stable reaction state to promote the pyrolysis of volatile matters in the biomass to generate biomass fuel gas; meanwhile, biomass charcoal after biomass gasification is discharged out of the gasification furnace through a charcoal cooling screw conveyor, and is conveyed to a charcoal warehouse through a charcoal conveying system for collection, packaging and recovery;
step two, the biomass fuel gas at the outlet of the biomass gasification furnace is pressurized by a fan and then is sent into a heat insulation combustion chamber to be combusted to generate high-temperature flue gas A1 with the temperature of 800-;
step three, all high-temperature flue gas A1 generated by the heat insulation combustion chamber enters the air distribution chamber, and is adjusted to a proper temperature by the air distribution chamber to be used as a heat source B1 of the sludge drier; the hot air enters the sludge drier and evaporates the water in the sludge by utilizing the heat energy of the hot air, so that the water content of the sludge is reduced from 80 percent of the water content of the inlet to 30 to 35 percent of the water content of the outlet; conveying the dried sludge to a sludge carbonizing machine; the mixed gas C of the dried flue gas and the water vapor evaporated from the sludge is discharged after the pollutants are treated by the tail gas treatment unit and reach the standard;
step four, the sludge carbonizing machine is connected with a burner, and a heat source B2 required by the carbonization reaction of the sludge carbonizing machine is independently supplied by the burner through combustion of combustible gas in the carbonization process; the residual carbon of the cracked part and the original fixed carbon and non-volatile part in the sludge form sludge carbon together; discharging the sludge carbon out of the carbonizing machine through a carbon cooling screw conveyor, conveying the sludge carbon to a carbon warehouse through a carbon conveying system, collecting, packaging and recycling; high-temperature flue gas A2 discharged by the sludge carbonizing machine is recycled to the air distribution chamber to realize energy recovery and tail gas unified treatment.
6. The disposal method of the biomass gas-carbon co-production coupled sludge advanced disposal system according to any one of claims 3 to 5, characterized by comprising the following steps: a part of mixed gas C discharged by the sludge drier is led out and enters the adiabatic combustion chamber or the air distribution chamber as air distribution.
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