13 results about "Sludge incineration" patented technology

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.

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 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 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.

This application discloses a sludge incineration system coupled with a coal-fired boiler, including a sludge incinerator and a waste heat boiler. The inlet end of the waste heat boiler is connected to the exhaust port of the sludge incinerator, and the outlet end of the waste heat boiler is connected to a dust collector. The outlet end of the dust collector is connected to a pulverized coal boiler, and the exhaust end of the pulverized coal boiler is equipped with a purification module. At the same time, a flue gas circulation pipe is connected in parallel at the outlet end of the dust collector, and the outlet end of the flue gas circulation pipe is connected to the sludge incinerator to guide part of the sludge incineration flue gas back into the sludge incinerator. Compared with the prior art, this application treats pollutants in the sludge incineration flue gas through the high-temperature environment of pulverized coal combustion, such as through high-temperature cracking of dioxins. The exhaust gas after incineration is discharged after purification by the purification module, thereby achieving harmless treatment of sludge incineration exhaust gas through linkage with the pulverized coal boiler, eliminating the need to build a separate flue gas purification system and reducing the cost of sludge treatment.

The application provides a sludge incineration device and a sludge incineration method, relates to the field of sludge incineration, and comprises a machine body, a mounting seat arranged on the machine body, a feeding hopper arranged on the mounting seat and a squeezing mechanism arranged on the mounting seat. In order to solve the problem that the sludge incineration device in the prior art is blocked due to the fact that the sludge is partially agglomerated into blocks when the sludge is fed, the efficiency of the device is reduced, the squeezing mechanism is arranged, the sludge is cut into particles by the squeezing mechanism, the oxygen in the machine body can be more fully contacted with the sludge particles, the combustion efficiency is improved, the sludge is prevented from being partially agglomerated into blocks, and the feeding hopper is prevented from being blocked. The squeezing mechanism is arranged, the problem that the environment is seriously polluted due to the fact that a large amount of dust is discharged in the prior art is solved, the squeezing mechanism is arranged, and the problem that the sludge is unevenly distributed and combustion is uneven in the prior art is solved.

The present application relates to the technical field of medical sludge disposal technology, and discloses a medical sludge incineration method and device, which is realized based on a medical waste incineration system with an incinerator and a secondary combustion chamber; medical sludge is dried to dry medical sludge particles with a water content of less than 30wt%, and then the dry medical sludge particles are mixed into medical waste at a mass ratio of 1:9-1:3 and incinerated together with the medical waste; wastewater generated during the drying process is collected and treated through a wastewater collection tank, and waste gas generated during the drying process is collected and transported for treatment through a waste gas conveying pipeline.In the present application, the medical sludge is mixed and burned in the original medical waste incineration system through a specific mixing and burning method, which not only has little effect on the original burning, but also can synergistically reduce the concentration of tail gas pollutants in the original medical waste incineration system; it is also conducive to reducing the calorific value of the medical waste mixture, improving the disposal capacity of the incineration system, and saving the treatment cost of medical sludge.

The aim is to reduce the size of the drying equipment in a stoker-type incinerator and to prevent dewatered sludge from adhering to the grate and becoming unable to be fed out, and to prevent the dewatered sludge from becoming compacted into large lumps, making complete combustion in the incinerator difficult. [Solution] When operating a sludge incineration facility 100 that sends out sludge and incinerates it using grates 12M and 12F that move back and forth between the upstream and downstream, dry sludge DB is supplied to the grates 12M and 12F, dewatered sludge with a higher water content than the dry sludge DB is formed into multiple molded sludge DSFs, powder 52 formed from the dry sludge DB is attached to the surface of each molded sludge DSF, multiple molded sludge DSFs with powder 52 attached are supplied and piled on top of the dry sludge DB supplied to the grates 12M and 12F, and the dry sludge DB with multiple molded sludge DSFs piled on top is sent to the combustion chamber 11 by the grates 12M and 12F for combustion.

The aim is to reduce the size of the drying equipment in a stoker-type incinerator and prevent the highly adhesive dewatered sludge from sticking to the grate and becoming unable to be fed out, or to prevent the dewatered sludge from becoming compacted into large lumps and making complete combustion in the incinerator difficult. [Solution] Sludge DS is sent from upstream to downstream by reciprocating grates 12M and 12F for incineration. At that time, dried body DB is supplied to the grates 12M and 12F, and dewatered sludge DS, which has a higher water content than dried body DB, is made into multiple molded sludge DSF with a shaped form, and an adherable body 52 smaller than the molded sludge DSF formed from dried body DB is attached to the surface of each molded sludge DSF. Multiple molded sludge DSF with the adherable body 52 attached are supplied and piled on top of the dried body DB supplied to the grates 12M and 12F, and the dried body DB with multiple molded sludge DSF piled on top is sent to the combustion chamber 11 for combustion.

The utility model relates to sludge incinerator technical field, and disclose a vertical sludge incinerator based on sludge incineration, including staggered cross mechanical grate, staggered cross mechanical grate oil pressure piston, flap type complete combustion device, flap type complete combustion device oil pressure piston and flap type complete combustion device ash pipe, sludge moves along the vertical direction in the furnace body, realizes complete incineration through above-mentioned component synergy. The staggered cross mechanical grate is staggered arrangement up and down along the vertical direction in the both sides of furnace body, can turn over sludge to enhance the contact with the combustion air when moving. The staggered cross mechanical grate adopts the special cast steel material of high temperature resistance, wear resistance and corrosion resistance to make. The utility model can effectively promote sludge complete combustion, makes sludge float loose through the combustion air to improve the air and sludge contact probability, can also prevent the short circuit of combustion air, avoid the grate to be burnt by high temperature, guarantee good flame diffusion simultaneously.

This invention relates to the field of drilling check valve technology and discloses a sludge incineration flue gas purification and deodorization device, including a support frame, a spray box fixedly connected to the side wall of the support frame, and a transmission pipe connected through the top of the spray box. This invention addresses the problem of excessive particle accumulation at the top of the filter cotton, which reduces the filtration performance of the filter cotton. Because the through-hole transmission belt is designed in a ring shape, subsequent through-hole transmission belts will replace the blocked through-hole transmission belts to reach the air inlet of the filter box, ensuring the filtration effect of the filter box. The through-hole transmission belts in a blocked state will reach the air outlet of the filter box under the drive of the CNC motor. As the direction changes, the airflow flows from top to bottom, and the flowing airflow will flow through the filter cotton again, causing large particles at the bottom of the filter cotton to be compressed and flow outward, effectively removing larger particles remaining in the flue gas and extending the service life of the filter.

The application discloses a sludge incineration ash heavy metal removal and magnetic separation and enrichment phosphorus synergic treatment method, first, iron-rich sludge is dried and broken into sludge powder, then chlorinated polyethylene powder is added and stirred uniformly to obtain an iron-rich sludge-plastic mixture; the iron-rich sludge-plastic mixture is placed in an incinerator to be incinerated to obtain sludge incineration ash; finally, the sludge incineration ash is subjected to graded magnetic separation to obtain phosphorus-rich ash and iron-rich ash. The application has the remarkable effect that, by mixing chlorinated polyethylene with iron-rich sludge and incinerating the mixture, the heavy metal content in the sludge incineration ash is effectively reduced, and the magnetic material in the sludge incineration ash is effectively separated from the non-magnetic material under the action of a specific magnetic field, which is helpful to the enrichment of phosphorus-containing substances, the Ca-P content in the obtained phosphorus-rich ash powder is high, the plant is easy to absorb, waste resource utilization is realized, the production cost is reduced, and the economic benefit is improved.