94 results about "Sludge incineration" patented technology

The application discloses a process method for directly drying sludge by using hot flue gas of sludge incineration, and a process system used mainly comprises a sludge incinerator, a sludge dryer, a drying tower, a dust removal system, a flue gas condensing tower, a regenerative thermal incinerator 10, a wet deacidification tower, a cold flue reheater and a chimney. The sludge is dried by using the hot flue gas generated by the sludge incineration, the dried sludge is incinerated again, the flue gas waste heat is utilized and discharged, the synchronous disposal of the sludge drying and incineration is realized, the sludge dryer is a rotary gas flow bed dryer, the sludge does not need to be crushed, granulated, made into strips or atomized by a nozzle, and the types of equipment are simplified. By adopting partial flue gas backflow, the flue gas emission and waste heat loss are reduced; the sludge drying process is operated under high humidity airflow, the oxygen content is not increased in the drying process, and the possibility of sludge explosion in the drying process is reduced. The regenerative thermal incinerator is used for removing VOCs and CO, and the problem of flue gas exceeding the standard caused by the sludge drying is solved.

The utility model relates to the technical field of sludge treatment, in particular to a sludge incineration system capable of preventing high-temperature feeding blockage of sludge, which comprises an incinerator, a flue gas cooler, a bag-type dust collector and a chimney which are sequentially connected, a sludge feeding pipe is arranged at the top of the incinerator, and a sludge water-cooled jacket is sleeved outside the sludge feeding pipe. A sludge feeding pipe is inserted into the sludge feeding pipe, the sludge feeding pipe is connected with the sludge feeding pipe through a flange, a plurality of communicated vent holes are formed in the flange and the sludge feeding pipe, the outer ends of the vent holes are connected with a cooling air pipe, and cooling air introduced by the cooling air pipe is blown into a circular seam between the sludge feeding pipe and the sludge feeding pipe. An auxiliary material feeding pipe is arranged on the side face of the incinerator, and an auxiliary material water cooling sleeve is arranged outside the auxiliary material feeding pipe in a sleeving mode. Sludge is prevented from being heated and coked through double cooling of water cooling and air cooling.

This utility model discloses a mechanical cold-press sludge treatment device, including a sludge mechanical cold-press deep dewatering system, a dried sludge incineration waste heat recovery system, and a flue gas purification system; it includes a wet sludge storage silo, a primary sludge conveying pump, a sludge conditioning machine, a secondary sludge conveying pump, a sludge distributor, a sludge cold press, a sludge feeder, a dry sludge storage silo, a sludge feeder, a sludge incinerator system, a waste heat boiler system, an SNCR in-furnace denitrification system, an electrostatic precipitator, a dry deacidification tower, an activated carbon injection system, a bag filter, a lime-gypsum wet deacidification tower, a low-temperature SCR denitrification system, an induced draft fan, and a chimney; this utility model achieves sludge dewatering and drying at room temperature through mechanical cold-pressing technology to reach the conditions for self-sustaining combustion, and then incinerates the dried sludge through a bubbling circulating fluidized bed incineration, fully recovering the heat released from sludge incineration for power generation or heating, thereby realizing the resource utilization of sludge.

The invention relates to a sludge incineration treatment system, and belongs to the field of sludge treatment. Comprising a sludge feeding system, an incineration system, an ash delivery system and an ash circulation system. By means of the double-sleeve type ash feeding pipeline, the air feeding quality can be improved, the problem that the rear section of a traditional air feeding system is small in pressure and prone to blockage is solved, high-pressure blowing is matched, and the stability of a sludge feeding system is guaranteed. A wear-resistant protective sleeve is additionally arranged at the elbow of the ash conveying pipeline, so that normal operation of equipment is ensured. The sleeve type high-temperature protection pipe is additionally designed, so that the problem of pipeline breakage caused by thermal expansion is completely eradicated; through the design structure of the valve, the flashboard is prevented from being clamped due to the fact that ash residues are accumulated in the supporting plate or gaps. By designing a cooling water line of the cooler, the steam heat efficiency of the circulating fluidized bed boiler is ensured. And an ash circulating system is additionally arranged, carbon particles which are not completely combusted in ash are fed into the hearth again, and the fuel utilization rate is increased.

The invention relates to the technical field of sludge treatment, in particular to high-activity papermaking sludge incineration ash as well as a preparation method and application thereof. The preparation method of the high-activity paper mill sludge incineration ash comprises the following steps: S1, carrying out sectional type hot air drying on dewatered paper mill sludge, so that the water content of the sludge is reduced to 15-25%; s2, feeding the dried sludge into a circulating fluidized bed incinerator, and pyrolyzing the papermaking sludge at 450-550 DEG C under an anoxic condition; carrying out activated combustion on the pyrolysis product under the conditions of oxygen enrichment and superheated steam injection at the temperature of 650-750 DEG C; then carrying out short-time stabilizing treatment on ash particles generated by activated combustion at 850-950 DEG C, and quenching; and S3, the cooled ash is ground, and the high-activity paper mill sludge incineration ash is obtained. The high-water-absorption material is prepared from the sludge incineration ash, and efficient treatment and resource utilization of dredged soil, river and lake bottom mud and engineering slurry are achieved.

This application relates to the field of solid waste resource utilization technology, specifically disclosing a method for synthesizing lithium iron phosphate based on sludge incineration ash through electrocoagulation-lithiation. The method involves leaching sludge incineration ash with dilute sulfuric acid to obtain a phosphate-containing acid leachate, followed by purification with a cation exchange resin to remove multivalent metal impurities. Using the purified phosphate solution as the base electrolyte, a lithium source, electrolyte, and organic carbon source are added, and the pH is adjusted. An iron plate is used as the anode and an inert electrode as the cathode for electrocoagulation. Fe²⁺ dissolved at the anode co-precipitates with PO₄³⁻ and Li⁺ in the solution to form a LiFePO₄ precursor slurry. Finally, solid-liquid separation, washing, drying, and programmed temperature sintering are performed to obtain a carbon-coated lithium iron phosphate composite material. This application has the advantage of achieving high-value utilization of sludge incineration ash.

This invention discloses an environmentally friendly shale brick based on multi-source waste and its preparation method. Using shale as the matrix, it is compounded with fine powder from construction waste, sludge incineration ash, waste ceramic powder, and rice husk charcoal. Simultaneously, calcined kaolin, red mud, silane coupling agent, calcium stearate, sodium carboxymethyl cellulose, polyvinyl alcohol, and sodium lignosulfonate are introduced to form a composite system of "inorganic solid waste + mineral reinforcement + organic modification + low-temperature segmented sintering." The organic components play a role in plasticizing, binding, water retention, and crack reduction during the green body stage. They completely pyrolyze at high temperatures without residue and do not affect mineral phase formation. In synergy with the inorganic system, the green body achieves crack-free construction, extremely low shrinkage, and significantly improved strength.

The application discloses a sludge incineration device and method for a rotary kiln with staged air distribution and flue gas recirculation, which sends sludge and primary air into the rotary kiln from the kiln head; sends secondary air from the kiln head to the ignition section of the rotary kiln; and sends recirculated flue gas from the kiln head to the stable combustion section of the rotary kiln. The staged air distribution can form an oxygen-deficient fuel-rich zone in the initial combustion stage to inhibit the generation of NO x ; and the remaining air required for combustion is sent in the form of secondary air in the later combustion stage to make the fuel burn out; the flue gas recirculation can moderately reduce the oxygen content in the furnace and strengthen the reducing atmosphere in the combustion zone, which is beneficial to further reducing the emission of NO x in the sludge incineration process. The application uses the staged air distribution and flue gas recirculation, not only reduces the emission of NO x , but also avoids the problem that the SNCR method commonly used in the denitration of the rotary kiln incinerator needs to add ammonia water and external equipment, thereby reducing the operation cost and having good economic efficiency and application prospect.

The invention belongs to the technical field of environmental protection, and particularly relates to a multi-pollutant cooperative control method for ultralow emission of solid waste incineration flue gas. The solid waste incineration flue gas is deacidified by a semi-dry method, and then enters a biological absorption device to remove acidic pollutants such as sulfur dioxide and hydrogen chloride in the flue gas by adopting biological washing absorption, and then enters a thermophilic composite catalytic biological purification device to carry out synergistic pollution reduction on pollutants such as nitrogen oxides, heavy metals and dioxin in the flue gas; meanwhile, a wastewater treatment recycling system with a biochemical system is arranged, so that ultralow emission of flue gas is realized; the method can replace medium and low temperature SCR denitration, activated carbon jet adsorption and wet deacidification, and solves the problems that in the existing flue gas multi-pollutant synergistic pollution reduction technology, the low temperature SCR denitration is unstable, the operation cost is high, the adsorption method is easy to saturate, the adsorption and purification efficiency is low, secondary pollution is easy to generate and the like; the device is suitable for deep purification treatment of flue gas pollutants in waste incineration, sludge incineration, hazardous waste incineration and other solid waste incineration.

The utility model belongs to the technical field of flue gas treatment, and particularly discloses a municipal sludge incineration flue gas system for increasing the flue gas temperature of a bag-type dust collector, which comprises an incineration kiln and a secondary combustion chamber connected with the incineration kiln, and the secondary combustion chamber is sequentially connected with a spray drying tower, a cyclone dust collector and the bag-type dust collector through a main pipe. A branch pipe is connected to the main pipe between the secondary combustion chamber and the spray drying tower, the other end of the branch pipe is connected to the main pipe between the cyclone dust collector and the bag-type dust collector, a heat exchanger is arranged on the branch pipe and used for reducing the flue gas temperature, and a first valve is arranged on the branch pipe between the heat exchanger and the secondary combustion chamber; compared with an incineration flue gas system in the prior art, the sludge incineration flue gas system has the advantages that the inlet temperature of the bag-type dust collector can be increased, the moisture content of flue gas can be reduced, the bag pasting phenomenon of the bag-type dust collector is avoided, and the stable pressure difference between the inlet and the outlet of a bag is ensured, so that the incineration efficiency of an incineration kiln is improved, and the energy consumption of a fan is reduced.

The invention discloses a biomass fuel combustion-supporting method for a sludge incineration circulating fluidized bed boiler, and solves the problems of large fluctuation of a sludge combustion heat value and how to scientifically and reasonably carry out blending combustion on sludge fuel and biomass fuel in a hearth so as to realize safe and stable combustion of the boiler. The sludge fuel and the biomass fuel are designed to be respectively fed into a furnace; a bottom material is laid on an air distribution plate, biomass particle fuel entering a furnace is ignited through oil ignition, and when the temperature of a hearth is increased to 850 DEG C or above, sludge fuel is fed, so that the blanking point of the sludge fuel entering the hearth is arranged above the blanking point of material returning of a cyclone separator; a blanking point of biomass particle fuel entering a hearth is arranged above a blanking point of sludge fuel entering the hearth, and a single-row secondary air inlet is arranged above the blanking point of the biomass particle fuel entering the hearth, so that after the sludge fuel begins to be fed, a combustion structural form that combustion sludge rises and then is mixed with the biomass fuel entering the hearth for combustion is constructed.

The present application relates to a kind of sludge incineration fly ash phosphorus resource preparation multifunctional water-soluble fertilizer method, multifunctional water-soluble fertilizer;With biological sludge incineration fly ash as core raw material, by weak acid directional solvus-potassium sulfate synergistic cooperation-alkaline complex liquid selective chelation heavy three-stage type core process, realize the efficient solvus of phosphorus, heavy metal and arsenic are removed in depth and multifunctional nutrient in situ coupling.The process of the present application is normal temperature and pressure, mild and efficient, fly ash and alkaline complex liquid are zero-cost raw materials, only a small amount of sulfuric acid, potassium sulfate adjuvant, with high phosphorus solvus rate (≥80%), heavy metal and arsenic removal rate (≥99%) and low production cost, solve the biological sludge incineration fly ash phosphorus-heavy metal-arsenic associated separation difficult, agricultural and building material path double limited industry pain points, realize solid waste resource, phosphorus resource high value and the coordinated development of green agriculture, overall technology reaches international leading level, some core innovation is unique in the world.

The invention discloses a sludge drying incineration control system and method utilizing coupled pyrolysis gas, and belongs to the technical field of sludge incineration treatment.The sludge drying incineration control system comprises a treatment system and a monitoring control system.The treatment system sequentially comprises a pretreatment device, a drying device, an incinerator, a waste heat utilization device and a flue gas purification device; a shunting regulation and control device is further arranged between the drying device and the incinerator, the shunting regulation and control device comprises a shunting three-way valve, a direct combustion branch pipeline and a pyrolysis branch pipeline, and the outlet end of the pyrolysis branch pipeline is further provided with a pyrolysis device, a pyrolysis gas purification device and a coupling supply device. On the basis of split-flow treatment of sludge from the same source, the pyrolysis unit serves as an internal energy supply unit of the incineration unit, and combustible gas generated by pyrolysis is used for preferentially replacing auxiliary natural gas needed by incineration and carrying out bottom-covering regulation and control, so that an energy self-coupling closed loop in the sludge treatment system is constructed.

The invention relates to a heavy metal removal system for sludge incineration boiler flue gas, which comprises a fan, a first flue, a first desulfurization tower, a second flue, a second desulfurization tower, a third flue and a chimney which are sequentially arranged outside an incinerator flue gas outlet in a communicating manner, the economizer is arranged on the first flue, and the tubular heat exchanger is arranged on the third flue. The device has the beneficial effects that the tubular heat exchanger is arranged on the third flue, water vapor is condensed and liquefied through heat exchange, heavy metal is attached to liquefied water and is discharged from the liquefied water outlet of the tubular heat exchanger, and heavy metal aerosol is prevented from being formed; the water vapor is condensed and liquefied, the humidity of the flue gas is reduced, acid gas in the flue gas can be prevented from being combined with the water vapor to generate strong acid, and corrosion to equipment in the system is reduced.

The invention discloses a method for extracting phosphorus from sludge incineration ash and recycling residues, and belongs to the field of sludge recycling. The method comprises the following steps: firstly, conditioning municipal sludge to dehydrate by adopting calcium salt, reducing the water content of the sludge and fixing phosphorus in a liquid phase; then, the obtained calcium-containing sludge and an alkali metal reagent are mixed and incinerated, and insoluble metal phosphate in the sludge is promoted to be converted into water-soluble phosphate; the incineration ash is subjected to water leaching treatment, and a phosphorus-rich solution can be obtained through separation (the phosphorus recovery rate is gt; 90%) and leaching residues; finally, the leaching residues are directly mixed with cement, sand and water in proportion, and the strength of the prepared mortar test block meets the GB 175-2007 standard requirement. In the sludge treatment process, efficient recycling of phosphorus resources in the sludge and complete recycling of incineration ash leaching residues are synchronously achieved, the method has the advantages of being simple in process and controllable in cost, the mature incineration process is coupled, and industrial application is easy to achieve.

This invention discloses a system and method for direct incineration of high-moisture-content sludge, including a high-moisture-content sludge direct incineration device, a flue gas heat exchanger, a blower, flue gas treatment equipment, an induced draft fan, and a chimney. The high-moisture-content sludge direct incineration device includes a multi-pass rotating device and a settling chamber. In this system, the sludge is dried in the first pass, pyrolyzed in the second pass, and burned in the third pass. High-temperature air serves as the heat source for sludge drying and also as the combustion air during sludge incineration. This device is the core of the system, integrating multiple sludge disposal processes into one, resulting in a relatively simple and easy-to-control system. The high-moisture-content sludge direct incineration device in this system can effectively dry, pyrolyze, and incinerate sludge. The exhaust gas generated during drying is also treated during incineration, eliminating the need for separate treatment lines.

The application discloses a method for realizing simultaneous denitrification and desulfurization by coupling sludge incineration flue gas and sludge drying condensate water, which comprises the following steps: carrying out oxidation treatment on the dust and ash removed incineration flue gas by ozone oxidation; using sludge drying condensate water anaerobic digestion effluent as the only absorption liquid to absorb the incineration flue gas, so that NO x and SO x in the flue gas are transferred to the liquid phase; the absorption liquid is introduced into a short-cut denitrification reactor, and short-cut denitrification anaerobic ammonia oxidation and sulfate reduction anaerobic ammonia oxidation are utilized to realize simultaneous denitrification and desulfurization. The application realizes flue gas desulfurization and denitrification and sludge drying condensate water denitrification by coupling the incineration flue gas and the sludge drying condensate water and utilizing anaerobic ammonia oxidation and sulfate reduction anaerobic ammonia oxidation, and the reagent adding and operation cost are greatly saved.

The utility model relates to the technical field of sludge incinerators, and discloses a circulating fluidized bed incinerator for incinerating sludge, which comprises an incinerator main body, an igniter is mounted on the front side of the incinerator main body, a pretreatment assembly is arranged on the rear side of the incinerator main body, and the pretreatment assembly comprises a treatment box arranged on the rear side of the incinerator main body. And an extrusion cylinder is fixed to the top face of the treatment box in a penetrating mode, a pressing plate is slidably arranged in the extrusion cylinder, the bottom face of the extrusion cylinder abuts against a separation base, and a filtering plate is fixed to the top face of the separation base. According to the sludge incineration device, sewage is firstly extruded and removed, the water content of residual sludge is greatly reduced, the incineration process can be more efficient, dry sludge is easier to burn and high in heat value, and extra energy consumption is reduced; high-temperature flue gas generated in the incineration process can be effectively utilized to evaporate moisture, the moisture is prevented from taking away a large amount of heat in the incineration process, and the overall sludge combustion efficiency is improved.

The invention relates to the technical field of tail gas purification, and provides a sludge incineration tail gas purification system which comprises a plurality of dust removal towers, and the dust removal towers are used for preliminarily removing dust particles from tail gas generated by sludge incineration through dust removal bags in the dust removal towers; the dust removal bag is in a curled state under the action of the multiple folded offset blocks, the multiple offset blocks are unfolded through a traction assembly to synchronously pull the dust removal bag to be unfolded so as to shake off dust particles on the surface of the dust removal bag, and the dust particles are rapidly discharged through an ash discharging channel installed at the bottom end of the dust removal tower. Heat of tail gas in the gas inlet pipe can be recycled for heating reaction liquid, the reaction capacity of the reaction liquid and substances in the tail gas is improved, the efficiency of removing acid and alkaline gas through catalytic reaction is enhanced, and efficient utilization of energy is achieved; the problems that in an existing sludge incineration tail gas purification technology, the acid gas removal efficiency is low, the dust removal effect is poor, and the heat recycling rate is low are effectively solved.

The invention discloses a sludge incineration treatment system and method.The system is characterized in that on the basis of comprising a sludge drying device, a sludge incinerator, a sludge carbonization furnace and a waste heat boiler, a mixing granulation device and a sintering device are innovatively introduced, molten ash generated by incineration and carbonization products are mixed and granulated through the system, and the sludge incineration treatment system is obtained; high-temperature combustible gas generated in the carbonization process is used as a sintering heat source, and the mixed particles are sintered into a high-strength building material product; through cooperation and circulation of materials and energy, thorough harmlessness, reduction and high-value recycling of the sludge are achieved, meanwhile, the energy efficiency of the system is improved, and remarkable environment-friendly and economic values are achieved.

The utility model relates to the technical field of garbage incinerators, in particular to a garbage incinerator with a sludge drying jet device, which comprises a plurality of groups of equipment boxes, the spraying assembly comprises a transmission disc, a transmission rod, a servo motor, a transmission plate, a lifting rod, a piston, a transfer cylinder, a three-way pipe, a first check valve, a second check valve, a spraying head and a feeding pipe, a partition plate is arranged in the equipment box, and a positioning shaft sleeve is fixedly connected to the position, located on the front side of the partition plate, of the lower surface of the equipment box; a servo motor, a transmission disc and a transmission plate are matched to drive a lifting rod and a piston to slide up and down in a transfer cylinder, sludge in a feeding pipe is sucked into the transfer cylinder, then the sludge is sprayed into a furnace body through a spraying head, intermittent spraying is achieved, the sludge has a certain combustion time, the sludge incineration effect is effectively improved, and the sludge incineration efficiency is improved. And residues generated by incineration are reduced, so that generation of particle dust is reduced, and the environment-friendly effect is improved.

This invention relates to the field of sludge resource utilization technology, and more particularly to a method for recovering battery cathode materials from sludge. The technical solution provided by this invention involves incinerating dried sludge to obtain sludge incineration ash, then leaching the ash using an organic reducing acid, followed by solid-liquid separation to obtain a phosphorus-containing supernatant. The pH of the phosphorus-containing supernatant is then adjusted, and a Li source, Fe source, Mn source, template agent, and carbon source are added to the pH-adjusted supernatant to obtain a mixed solution. This mixed solution is then subjected to hydrothermal synthesis to obtain the battery cathode material. Therefore, the above technical solution involves direct hydrothermal synthesis of the pH-adjusted mixed solution, thus shortening the process flow for preparing battery cathode materials.

An outlet in the upper end of a drying and dewatering device is communicated with an incineration cavity of a sludge incinerator, the top of the sludge incinerator is communicated with a dust remover through a smoke pipeline, a spray tower is arranged at the output end of the dust remover, and a denitration device is arranged at the output end of the spray tower. And the fly ash re-combustion chamber is positioned at the lower end of the dust remover and is used for re-combusting substances discharged from the lower end of the dust remover. According to the invention, sludge is fully dehydrated and dried before entering the incinerator; a sludge incineration auxiliary material adding opening is formed in an incineration cavity of the sludge incinerator, the incineration efficiency and the product quality are improved, flue gas treatment is achieved, and pollution to the atmospheric environment is greatly reduced; due to fly ash treatment, potential hazards of fly ash to the environment and human health are reduced; high-temperature gas in the incineration cavity of the sludge incinerator is introduced into the sludge drying and dewatering device through the gas pipeline and used for drying the sludge, and remarkable economic benefits and environmental benefits are achieved.

The application discloses a sludge incineration flue gas denitration device, which comprises a flue gas heat exchanger, a cold side flue gas inlet, a cold side flue gas outlet, a hot side flue gas inlet and a hot side flue gas outlet, the cold side flue gas inlet is connected with a flue for flue gas to be denitrated, and the hot side flue gas outlet is connected with a flue for discharging flue gas; two flues, the inlets of which are connected with the cold side outlet of the flue gas heat exchanger, a flue valve is arranged on the first flue, and a flue fan, a burner, a flue venturi, a first temperature detector and a urea lance are sequentially arranged on the second flue; a mixed flue, the inlet of which is connected with the outlets of the two flues, and a flue mixer, a second temperature detector and an SCR reactor are sequentially arranged on the mixed flue, and the outlet of the mixed flue is connected with the hot side flue gas inlet. The application further discloses a sludge incineration flue gas denitration method. The application does not need to arrange a urea pyrolysis tower, saves the land occupation area, realizes high-temperature pyrolysis of urea by heating part of flue gas, improves the heat utilization rate and saves fuel.

The application belongs to the technical field of urban domestic sludge incineration ash treatment process, and directly attacks and destroys the silicon-oxygen lattice of silicate by using an activator to make the silicon-oxygen bond break and establish a new silicon-fluorine bond, and a large part of useful resources and heavy metals are released in the process of breaking the old covalent bond and forming a new covalent bond, then the chelating agent is used for leaching, and phosphorus, silicon, iron, copper, zinc, chromium and nickel are comprehensively recovered through post-treatment, the application recovers instant potassium dihydrogen phosphate, the fertilizer is strong and is a phosphorus-potassium dual-purpose fertilizer, is suitable for various planting and urban vertical hydroponics, silicon dioxide is recovered, copper electrodes, metal zinc and nickel-chromium alloy are obtained by using the electrodeposition method, and the leaching residue is made into high-temperature ceramic refractory heat insulation material with low thermal conductivity. The unique design of the application makes the main reagents, the activator and the leaching agent, can be recycled, which saves resources and greatly saves costs. There is no sewage and waste gas emission, and the environment is protected while the value is created.

The present application belongs to the technical field of wet sludge disposal and energy recycling, and particularly relates to a large-scale sludge disposal system based on deep utilization of low-grade heat energy, which comprises a treatment system for drying and incinerating sludge, a low-grade heat energy recovery system for recovering sludge incineration heat, a low-grade heat energy deep heat exchange system for deep heat exchange of process heat, and a deep utilization and consumption system for deep utilization of process heat. The present application fully recycles low-grade heat energy from different point sources in the production link of a thermal power plant according to the characteristics and attributes of the low-grade heat energy, saves high-quality steam, realizes energy cascade utilization, and has better economic benefits.

The utility model relates to the technical field of sludge incineration treatment, and discloses a drying incineration sludge treatment device which comprises a treatment box, an incinerator is arranged on the right side of the treatment box, treatment assemblies are arranged on the top face and in the treatment box, and each treatment assembly comprises a first conveying cylinder fixed to the top face of the treatment box. A first conveying auger is rotationally connected to the rear side of the interior of the first conveying cylinder, and a belt conveyor is installed in the treatment box. Hot air is conveyed into the treatment box through the air blower and the heating box, sludge is conveyed to the top of the belt conveyor through the first conveying cylinder, then the sludge is conveyed along a path opposite to the flowing direction of the hot air, the sludge is gradually heated in a gradient mode in the conveying process, the sludge makes full contact with the hot air, and the heat energy utilization rate is remarkably increased; meanwhile, water in the sludge is evaporated layer by layer due to the reverse conveying design, and compared with traditional one-way conveying, the whole sludge is heated more uniformly, and the heating time is longer.

The application discloses a pyrolysis gasification sludge incineration process, comprising the following steps: S1, pretreating oily sludge, and crushing straw; S2, putting the pretreated oily sludge, the crushed straw particles and calcium oxide powder into a mixer to be fully mixed to obtain a mixture; S3, putting the mixture obtained in the step S2 into a pyrolysis furnace to be subjected to anaerobic or anoxic pyrolysis treatment by taking potassium-modified ZSM-5 molecular sieve particles as an ex-situ pyrolysis catalyst; S4, performing condensation treatment on the pyrolysis gas obtained in the step S3 after purification, wherein liquid products are aromatic hydrocarbon oil, which is recycled and reused, and gaseous products are non-condensable gas, which is subjected to incineration treatment; and S5, recycling the pyrolysis solid product obtained in the step S3 to be reused as biomass charcoal. The application has a high resource recycling rate, can pyrolyze, gasify and recycle aromatic hydrocarbon oil, has a good overall economic benefit, and the catalyst can be repeatedly used, and basically no secondary pollution is caused.

The invention discloses a preparation method of a plaster coating based on multi-stage filling and solid waste high-value treatment. The preparation method specifically comprises the following steps: S1, high-value modification; s2, particle size selection; s3, preparing a dry blend; s4, preparing a wet mixed material; the invention relates to the technical field of building materials. According to the stucco coating preparation method based on multi-stage filling and solid waste high-valued treatment, the concept of minimum particle size is introduced through a Dinger-Funk equation, graded matching optimization of multi-stage filling is achieved, the void ratio is reduced, the solid waste mixing amount is increased through high-valued treatment of fly ash and sludge incineration residues, meanwhile, the stucco coating with high compressive strength is obtained, and the stucco coating with high compressive strength is obtained. And collaborative optimization of strength improvement, solid waste absorption and carbon emission reduction is realized.