198 results about "Sludge incineration" patented technology

The invention relates to the technical field of energy utilization and energy conservation and emission reduction, and discloses a sludge incineration tail gas treatment system and an energy storage heat exchanger. The system comprises a tail gas purification module, a carbon capture and solidification module, a circulating power generation module, an air dehumidification heat pump module and a cascade energy storage module. The tail gas purification module is used for sequentially carrying out particulate matter filtration, desulfurization, electrostatic dust collection and denitration treatment on tail gas discharged by the incinerator; the carbon capture and solidification module is used for collecting CO2 in the tail gas through a temperature swing adsorption and low-temperature cooling technology; the circulating power generation module is used for converting low-grade waste heat in the tail gas into electric energy through an organic Rankine cycle technology; the air dehumidification heat pump module is used for dehumidifying and preheating air entering the incinerator; the stepped energy storage module is used for conducting graded recovery and management on waste heat of different temperature zones in tail gas in the purification process. According to the system, various pollutants in the tail gas are efficiently removed, and waste heat of different temperature grades is recycled and utilized in a graded mode.

The invention discloses a method for recovering phosphorus through anaerobic digestion by adding sludge-based biochar, which comprises the following steps of: firing dewatered sludge serving as a raw material under an anaerobic condition to obtain carbonized carbon; or firing under an aerobic condition to obtain pyrolytic carbon, adding any sludge-based biochar obtained by firing into the hydrothermal dewatered sludge, and carrying out anaerobic digestion on the hydrothermal dewatered sludge; the hydrothermal dewatered sludge is obtained by performing hydrothermal pretreatment on dewatered sludge; and carrying out phosphorus recovery on the sludge-based biochar subjected to anaerobic digestion by utilizing a magnetic separation method. Compared with the traditional method for recovering the phosphate fertilizer from the sludge incineration ash, the recovery method disclosed by the invention is green and pollution-free, belongs to a sludge treatment mode of treating waste with waste, realizes effective combination of a heat treatment mode and a biological treatment mode, and has a good practical application value. Moreover, the prepared sludge-based biochar has the property of magnetism, so that the recovery rate of the subsequent blue iron ore is increased, and the separation difficulty and economic investment are reduced.

The invention relates to the technical field of environmental protection, in particular to a sludge incineration flue gas efficient purification system which comprises a pretreatment module, a dynamic ion separation module, an acid gas neutralization module, a heavy metal adsorption module, an acid-gold interaction purification module, a deep oxidation module and an intelligent control module. Wherein the pretreatment module is used for receiving initial flue gas flow; the dynamic ion separation module is used for primarily separating heavy metal ions; the acid gas neutralization module is used for stabilizing emission of acid gas; the heavy metal adsorption module is used for accurately adsorbing heavy metal ions; the acid-gold interactive purification module is used for treating composite pollutants; and the intelligent control module is used for automatically adjusting module operation parameters. According to the sludge incineration flue gas treatment system, by integrating an efficient purification technology and intelligent control, comprehensive removal and stable up-to-standard emission of various pollutants in sludge incineration flue gas are achieved, and the response speed, the purification efficiency and the energy-saving effect of the system are improved.

The utility model relates to the technical field of resource recycling devices, and discloses a domestic sludge incineration ash and construction waste combined treatment and recycling device which comprises a box body, and a second servo motor is arranged on one side of the upper end of the end face of one side of the box body. When the device is used, a second servo motor is arranged to drive a crushing roller to rotate, so that the crushing roller can crush domestic sludge incineration ash and construction waste which enter the box body; during crushing, a vibrating motor is arranged to drive a screen to screen the crushed domestic sludge incineration ash and construction waste, and the incomplete domestic sludge incineration ash and construction waste can be vibrated back into the crushing roller to be subjected to secondary crushing; therefore, domestic sludge incineration ash and construction waste which are large in size originally can be effectively treated, the size is reduced, the subsequent treatment efficiency is improved, and the overall production efficiency is improved.

The invention relates to a high-gloss black decorative glass prepared from sludge incineration ash by an all-electric melting method. The high-gloss black decorative glass comprises the following raw material components in percentage by mass: 75-79% of fly ash, 5-7% of calcium carbonate, 9-10% of sodium carbonate, 5-6% of potassium alkali, 1-1.4% of boric acid, 0.03-0.04% of porous carbon, 0.06-0.08% of semi-coke powder, 0.16-0.22% of cobaltosic oxide, 0.1-0.2% of cerium dioxide, 0.04-0.06% of neodymium oxide, 0.5-0.7% of waste zircon brick powder and 0.03-0.05% of yttrium oxide. The dedusting ash is electrostatic dedusting ash collected by incineration of filtered sludge in a municipal sewage treatment plant, and belongs to hazardous waste; the porous carbon is rich in a hierarchical pore structure of sub-nano pores (0.5-1.0 nm). According to the method, a closed-loop production mode that waste is used for treating waste is constructed, high-added-value decorative materials are produced while energy consumption is reduced, and environmental protection investment is converted into economic benefits.

The utility model discloses a boiler make-up water heating system based on waste heat utilization of tail gas of a sludge incineration boiler, belongs to the technical field of waste heat recovery, and solves the problem that heat in flue gas is recycled to heat boiler make-up water so as to realize repeated recycling of resources. Comprising a boiler air duct, and a lower mounting frame communicating with the interior of the boiler air duct is fixedly connected to the peripheral wall of the boiler air duct. According to the system, the tail gas of the sludge incineration boiler can be guided to pass through the air pre-heater and the low-temperature coal economizer through the boiler air duct, so that heat in the tail gas of the sludge incineration boiler is recycled, and meanwhile, the flue gas amount of the tail gas of the sludge incineration boiler is large; the low-temperature liquid output from the slag cooler can be heated to the temperature capable of being used in a steam turbine, the actions of outputting the heated liquid and inputting the low-temperature liquid can be autonomously performed according to the change of the temperature, huge heat in tail gas of a sludge incineration boiler is fully utilized, and the resource utilization rate is increased.

The invention relates to low-cost retarded concrete and a preparation method thereof. The low-cost retarded concrete comprises the following components in parts by weight: 24-27 parts of cement, 6-8 parts of blast furnace slag powder, 5-8 parts of fly ash, 70-90 parts of fine aggregate, 2-7 parts of sludge incineration ash, 93-100 parts of coarse aggregate, 0.4-0.6 part of a water reducing agent, 0-0.25 part of a retarder and 12-21 parts of water. When the temperature of the production environment is lower than 30 DEG C, the retarder comprises sodium gluconate; when the temperature of the production environment is higher than or equal to 30 DEG C, the retarder further comprises white sugar. According to the invention, the sludge incineration ash is recycled, phosphate radicals dissolved in the sludge incineration ash are combined with calcium ions generated by cement hydration, and the calcium ions coat the surfaces of cement particles to hinder further hydration of cement, so that the purpose of retarding is achieved, and the cement can be retarded by increasing the mixing amount of the sludge incineration ash and the retarder. The retarded concrete meeting different setting time requirements can be prepared; other components in the sludge incineration ash can be subjected to secondary hydration reaction with calcium hydroxide generated by cement hydration, so that the durability of the concrete can be improved.

The invention provides a coal-based solid waste acid-activated cementing material and a preparation method thereof, and the preparation method comprises the following steps: fully crushing, calcining and ball-milling coal gangue, coal series kaolin and kaolin tailing slag to obtain a ball-milled material; grinding and sieving the sludge incineration ash to obtain screen underflow, and adding an extracting solution into the screen underflow to prepare an acid activator; mixing and stirring an acid activator and the ball-milled material to obtain neat paste; and carrying out pouring molding on the neat paste, and carrying out sealing maintenance to obtain the coal-based solid waste acid-activated gel material. The coal-based solid waste acid-activated cementing material prepared by the preparation method provided by the invention has good cementing property and mechanical property, and the preparation process is low in energy consumption, less in carbon dioxide emission, easily available in raw materials and low in price, so that the resource utilization of solid wastes is effectively realized; an engineering application foundation is laid for replacing cement on a large scale or preparing concrete for buildings, and the method can also be applied to soil remediation of contaminated sites.

The invention discloses a pressure-free baking-free brick for synergistically recovering solid waste molten water-quenched slag and sludge incineration ash and a preparation method. The water-quenched slag and the sludge incineration ash are used as building materials to prepare the high-strength baking-free brick. By utilizing a chemical component complementation mechanism between two solid wastes, through scientific formula design and combining process route optimization, efficient fixation of heavy metals and improvement of mechanical properties of the brick body are realized, and the brick is high in strength and good in durability. According to the invention, the use of traditional brick making raw materials is reduced, and the adopted pouring molding technology is low in energy consumption and less in carbon emission; according to the method, the two solid wastes of the water-quenched slag and the sludge incineration ash are effectively consumed and converted into the sintering-free brick value-added building material, the secondary utilization value of the solid wastes is further developed, efficient toxicity reduction of the water-quenched slag is achieved, environmental benefits and social and economic benefits are both achieved, and the method is worthy of popularization and application. And a new sustainable development direction is provided for resource utilization of solid wastes and green transformation of the building industry.

The present invention belongs to the technical field of building materials and solid waste resource utilization, and more specifically, it relates to a cement mortar containing sludge incineration ash and its preparation method and application. Among them, the cement mortar containing sludge incineration ash, by weight, includes: 315-405 parts of cement, 45-135 parts of sludge incineration ash, 1350 parts of machine-made sand, 4.5 parts of early strength agent and 225 parts of water. The raw materials are prepared into mortar, and the compressive strength after curing for 3 days is not less than 20MPa. The sludge incineration ash used is an auxiliary cementitious material with high activity, which can replace slag powder and fly ash in cement mortar in the prior art, and can further replace part of cement, effectively reducing the amount of cement, reducing costs, indirectly reducing carbon emissions, and being beneficial to resource conservation and environmental protection.

The utility model discloses a municipal sludge incineration system which comprises a dry sludge bin, an ignition furnace, a pre-combustion chamber, a suspended state incinerator, a collecting device, a heat exchange system and a waste gas treatment device. The pre-combustion chamber is connected with the suspended state incinerator and supplies heated air to the suspended state incinerator; dry sludge enters a suspended state incinerator to participate in combustion with heated air; the collecting device I is used for collecting incineration ash generated by combustion; the heat exchanger I is used for heating combustion-supporting air by using combustion flue gas discharged by the suspended state incinerator, and the combustion-supporting air is introduced into the suspended state incinerator to participate in combustion; the heat exchanger II heats cold air by utilizing excessive waste heat flue gas discharged by the heat exchanger I, so that waste heat utilization is realized; and the collecting device II is connected with a flue gas outlet of the heat exchanger II and is used for collecting fly ash in the flue gas. According to the invention, the incineration heat is in a closed-loop circulation loop, and redundant heat is also recycled, so that the use efficiency of the heat is greatly improved, and the energy consumption is reduced; ash generated by the system is collected in a multi-stage mode, tail gas is effectively treated, and environmental pollution is reduced.

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 invention relates to the technical field of sludge incineration treatment, in particular to a device for uniformly blending garbage with wet sludge in a garbage incineration power plant and a using method thereof.The device comprises a mixing cylinder, a discharging hole is formed in the top of the mixing cylinder, and a discharging pipe integrated with the mixing cylinder is arranged at the bottom of the mixing cylinder; the top of one side of the mixing barrel is fixedly provided with a sludge inlet pipe communicated with the mixing barrel, and the supporting assembly is arranged on the outer side of the mixing barrel; the material dispersing assembly is arranged at the top of the mixing barrel; the stirring mechanism comprises a rotating cylinder, a scraping plate, a rotating rod and a plurality of stirring plates fixed on the outer side of the rotating rod. A second servo motor drives a third bevel gear to rotate through an output shaft, the third bevel gear drives a first bevel gear and a second bevel gear to rotate, that is, a rotating cylinder and a rotating rod rotate synchronously, and the rotating directions of the rotating cylinder and the rotating rod are opposite, so that forward and reverse stirring occurs in the mixing cylinder, and the mixing degree is improved.

The present application discloses a sludge incineration flue gas purification and deodorization device, which includes a flue gas inlet pipe, a cyclone separator, a dust removal output pipe, a demisting tower, a demisting input pipe, an activated carbon adsorption tank, a gas output pipe, a biological fermentation tank and a flue gas outlet pipe which are sequentially connected and arranged, wherein two semi-cylindrical containing shells are rotatably arranged in the activated carbon adsorption tank, the containing shells are filled with activated carbon particles, and a plurality of adsorption pores are provided on the top and bottom surfaces of the containing shells, and a driving member for driving the containing shells to rotate is arranged in the activated carbon adsorption tank, and when the containing shells rotate to a certain position, the demisting input pipe and the gas output pipe are both connected and arranged with the adsorption pores. The present application has the effect of improving the separation quality of incineration flue gas.

The present invention discloses an incinerator, which includes a furnace, and the incinerator also includes a plurality of detachable heat exchange components, which are arranged in the incinerator and located below the furnace, and the heat exchange components transfer the heat in the incinerator to the outside of the incinerator. The incinerator can disassemble and install the heat exchange components according to the change of the calorific value of the sludge through the heat exchange components and the detachable design, and flexibly increase or decrease the heat exchange area in the incinerator, thereby improving the adaptability of the incinerator to the fluctuation of the calorific value and the moisture content of the sludge entering the furnace, improving the stability and application scope of the incinerator, reducing the energy demand for sludge drying and incineration, facilitating carbon emission reduction, and facilitating the replacement of severely worn heat exchange components.

The invention discloses a sludge incineration ash treatment method based on mineralization reaction, a mineralization product and application, and belongs to the technical field of solid waste treatment and resource utilization. The method comprises the following steps: crushing and screening sludge incineration ash, carrying out acid leaching activation on the ash by using diluted hydrochloric acid, adjusting the pH value to 3-5, and filtering to obtain a pretreated ash solution; and carrying out mineralization reaction on the pretreated ash solution and CO2, and carrying out solid-liquid separation to obtain a carbonate mineralizer. The sludge incineration ash is used for replacing traditional natural minerals to serve as a CO2 mineralization reaction raw material, the purpose of treating waste with waste is achieved, calcium and magnesium ions in the ash are efficiently extracted through an acid leaching activation technology, heavy metal impurities are synchronously removed, and the problems of high raw material cost, large mining energy consumption and solid waste landfill pollution of a traditional mineralization technology are solved; the defects of an existing sludge incineration ash residue resource utilization method in the aspects of heavy metal solidification and harmlessness are overcome, the CO2 storage amount of a single ton of ash residues reaches 0.2-0.3 ton, and the cost is reduced by 40%-50%.

The invention discloses a sludge dewatering flocculant and a preparation method and application thereof.The sludge dewatering flocculant is a natural polymer modified corn straw powder flocculant, natural corn straw is smashed into powder to serve as a base material, and cationic groups are carried by the base material through alkalization and graft copolymerization; and the cation group is quaternary ammonium group methyl. The modified corn straw powder flocculant is used for conditioning municipal sludge, is beneficial to flocculation and dehydration of the sludge, is extremely good in solubility, can be easily and fully dispersed in the sludge, is extremely small in addition amount, and has the characteristics of environment friendliness and high efficiency; the biomass fuel is prepared by modifying the corn straws, so that the biomass fuel also has the advantages of high calorific value similar to that of the corn straws and the like, and subsequent sludge incineration disposal is facilitated. Municipal sludge is conditioned through the modified corn straw powder flocculating agent and dehydrated, the water content of an obtained sludge cake can be as low as 65%, and the specific resistance SRF of the sludge can be as low as 6.25 * 10 <-12 > m.kg <-1 >.

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 present invention provides a heat circulation structure and a sludge co-combustion structure of a coal-fired power plant, comprising: a heat drying device, wherein the heat drying device is connected with a sludge incineration device through a high-temperature flue gas conveying pipeline, the heat drying device is connected with a fluidizing device through a fan, the fluidizing device is provided with a discharge port, the fluidizing device is connected with the sludge incineration device through the discharge port, the sludge incineration device is used to incinerate sludge to generate high-temperature flue gas, the high-temperature flue gas is transported into the heat drying device through the high-temperature flue gas conveying pipeline to provide heat for sludge drying, the heat in the heat drying device is transmitted to the fluidizing device to provide heat for fluidizing the dried sludge, thus forming a heat circulation among the heat drying device, the fluidizing device and the sludge incineration device; the problem of high energy consumption of sludge co-combustion in the boiler of the fluidizing device is solved, and the production cost is saved.

The invention discloses modified sludge incineration ash and application thereof. The modified sludge incineration ash comprises the steps of alkali liquor dipping, centrifuging or filtering, drying, exciting agent adding and mortar utilization. According to the method, the adverse effect of phosphorus in the sludge incineration ash on the cement hydration reaction is avoided, the activity of the sludge incineration ash is improved, meanwhile, the mixing amount of the sludge incineration ash in mortar is increased, a way is provided for large-mixing-amount application of the sludge incineration ash in building materials, and the method has a wide application prospect.

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.

The utility model discloses a desulfurization device which comprises a controller, a tail gas detection module and a storage bin, and the tail gas detection module is in communication connection with the controller; the system further comprises a blowing feeding mechanism and a premixing feeding mechanism which are communicated between the discharging end of the storage bin and a hearth of the incinerator in the material conveying direction, the blowing feeding mechanism and the premixing feeding mechanism are connected in parallel, and a blowing feeding assembly is communicated with an air supply device capable of blowing a desulfurizing agent into the hearth of the incinerator. A premixing bin for mixing a desulfurizing agent and sludge is arranged at the discharging end of the premixing feeding assembly, and a discharging opening of the premixing bin communicates with a feeding opening of the incinerator; and the blowing feeding mechanism and the premixing feeding mechanism are respectively in communication connection with the controller. According to the desulfurization device, the furnace feeding mode of the desulfurization agent can be optimized, so that the desulfurization effect in the sludge incineration treatment process of the sludge fluidized bed incineration treatment equipment is better. The utility model further discloses sludge fluidized bed incineration treatment equipment applying the desulfurization device.

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.

The embodiment of the invention provides a sludge drying and incineration treatment system, which comprises a sludge drying unit, a crushing and screening unit, a sludge incineration unit and a sludge incineration unit, wherein the sludge drying unit is used for reducing the water content of sludge through heat exchange and conveying the treated sludge to the crushing and screening unit; the crushing and screening unit crushes the sludge into a preset particle size range and then quantitatively conveys the sludge to the multi-fuel incineration unit; the multi-fuel incineration unit dynamically adjusts fuel combination and combustion-supporting parameters according to combustion working conditions and guides generated flue gas into the flue gas purification unit; and the flue gas purification unit purifies flue gas through a multi-stage treatment process and then discharges the flue gas. Through modular design and an intelligent control strategy, the system realizes efficient utilization of energy and deep purification of pollutants. The heat energy recovery mechanism of the drying unit greatly reduces the treatment energy consumption, the multi-fuel adaptation function of the incineration unit improves the operation stability, and the cascade treatment process of the flue gas purification unit ensures that the emission index is superior to the standard.

The utility model discloses a zero sludge discharge device for sewage treatment, and relates to the technical field of sewage treatment. Comprising a high-temperature incinerator body, a top cover is installed on the top of the high-temperature incinerator body, a sewage treatment box body is arranged above the top cover, a sludge discharge pipe is communicated to the sewage treatment box body and comprises an L-shaped pipe, an inclined pipe and a vertical pipe, and a feeding assembly is arranged on the high-temperature incinerator body and comprises a sludge feeding pipe rotationally arranged on the lower portion of the vertical pipe in a sleeving mode; the mud throwing pipe comprises a straight pipe and an eccentric pipe, and the straight pipe is rotationally inserted into the top cover. According to the sludge incineration device, through the arrangement of the feeding assembly and the bucket plate, the rotating motor is started to drive the gear to enable the rotating gear, the sludge feeding pipe, the inverted-L-shaped rod, the inclined scraping plate and the scraping rod to synchronously rotate, so that after the sludge feeding pipe uniformly feeds sludge into the bucket plate, the inclined scraping plate and the scraping rod conduct flattening operation, sludge incineration is more complete, and the sludge incineration efficiency is improved. And the incineration efficiency is improved to a certain extent, and zero sludge discharge operation is ensured.

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 present invention discloses a thermal system for sludge incineration, belonging to the technical field of sludge incineration, and relating to the optimization and transformation of the thermal system and stable production. The system includes a deaerator, a condensate tank and a steam header, and further includes a water seal device. A water seal chamber is provided in the water seal device. The water seal chamber is communicated with the steam exhaust pipe of the deaerator, and the water seal chamber is further connected with a steam vent pipe and a make-up water pipe. A regulating valve is provided on the steam vent pipe. The water seal device further includes a soft water tank. Soft water is filled into the water seal chamber through the make-up water pipe, and the soft water in the water seal chamber is communicated with the soft water in the soft water tank through a balance pipeline, so as to greatly increase the stability of the system, so that the continuous production capacity is greatly improved, and the purpose of increasing production and efficiency is achieved.