22 results about "Municipal solid waste incineration" patented technology

This application provides a method and product for preparing a composite coal-saving synergist for cement clinker using undisturbed fluorine-containing sludge and other solid wastes in a synergistic and low-energy-consumption manner. Fluorine-containing sludge, steel slag, municipal solid waste incineration fly ash, nickel-iron slag, and aluminum ash slag are used as main raw materials. Through a series of processes including raw material pretreatment, pre-homogenization, material proportioning design, extrusion granulation and activation-induced product formation, coagulation, self-hardening, self-curing, and self-drying, a composite coal-saving synergist for calcining high-quality cement clinker is prepared. This method avoids the drawbacks of high energy consumption and inefficient utilization of dried fluorine-containing sludge during the drying process. It fully utilizes the effective components in various solid wastes, including fluorine-containing sludge, to achieve synergistic effects, enabling large-scale, low-energy, and high-efficiency treatment of fluorine-containing sludge and other industrial solid wastes.

This application relates to the field of municipal solid waste incineration technology, and more particularly to a water-cooled screen device for waste heat boiler flue and a waste heat boiler using the same. The water-cooled screen device for waste heat boiler flue includes multiple sets of membrane water-cooled evaporator screen structures evenly spaced within the waste heat boiler flue. The top of each membrane water-cooled evaporator screen structure is suspended and connected to the top of the waste heat boiler flue, with the screen body extending vertically in the longitudinal direction. The interior of each membrane water-cooled evaporator screen structure consists of multiple steel pipes arranged laterally and extending vertically in the longitudinal direction. This solves the technical problems of insufficient heat absorption capacity of the waste heat boiler's heating surface, leading to high-temperature corrosion of the heating surface by flue gas and easy ash accumulation and blockage, increasing boiler flue gas resistance.

This invention discloses a grouting material based on water-treated municipal solid waste incineration bottom ash and its preparation method. The grouting material comprises 65-85 parts by weight of silicate cement, 15-35 parts by weight of municipal solid waste incineration bottom ash, and 39-41 parts by weight of mixing water. Before preparing the grouting material, the municipal solid waste incineration bottom ash is partially treated with mixing water for no less than 15 days. Pre-treating the waste incineration bottom ash with partial mixing water effectively reduces the aluminum content in the bottom ash, inhibiting the expansion and cracking caused by the reaction of aluminum in the alkaline environment of cement to generate hydrogen, thereby ensuring the volume stability and mechanical strength of the material. Ordinary silicate cement is used as the matrix, and water-treated municipal solid waste incineration bottom ash is added as an auxiliary cementing material. The mixture is stirred with water to form a slurry. The resulting grouting material has excellent mechanical properties and is suitable for engineering applications such as foundation reinforcement and rock and soil fissure filling.

This invention discloses a hydrothermal detoxification device for fly ash from municipal solid waste incineration, comprising a reactor, a pulse jet suspension mechanism, a differential speed agitation mechanism, and a static hydraulic cavitation mechanism. The pulse jet suspension mechanism is located at the bottom of the reactor to maintain fluidization throughout the reactor. The differential speed agitation mechanism is located in the middle of the reactor to perform high-frequency shearing and surface activation of suspended particles. The static hydraulic cavitation mechanism is located at the top of the reactor to enhance the hydraulic cavitation effect and increase the material reaction rate. The pulse jet suspension mechanism, differential speed agitation mechanism, and static hydraulic cavitation mechanism are all connected to an external control system for independent decoupled control. This invention features a compact structure, ease of use, and high reliability. It can enhance mass transfer and reaction in a highly alkaline environment through a low-speed, high-shear agitation system, significantly improving the effectiveness of hydrothermal detoxification of fly ash.

This invention discloses a method for preparing water-quenched municipal solid waste incineration ash and its fine aggregate concrete. The method includes: rapidly quenching molten municipal solid waste incineration ash in a room-temperature calcium hydroxide aqueous solution, removing it, and drying it to obtain water-quenched municipal solid waste incineration ash; crushing the water-quenched municipal solid waste incineration ash, sieving out particles larger than 4.75 mm, and then performing graded sieving to form a continuous gradation conforming to Zone II sand standards to obtain a water-quenched municipal solid waste incineration ash precursor; and carbonizing and curing the water-quenched municipal solid waste incineration ash precursor in a closed environment to obtain water-quenched municipal solid waste incineration ash, wherein carbon dioxide is used for carbonization and curing. This invention improves the microstructure and potential activity of municipal solid waste incineration ash, enabling it to be used as a stable fine aggregate in concrete.

The invention relates to a construction material (S), wherein the construction material (S) comprises at least cement clinker (ZK) and at least one water hardening additive (X), wherein at least one water hardening additive (X) is mixed with the cement clinker (ZK) and is not a component of the cement clinker (ZK) itself. [0002] According to the invention, the at least one water hardening additive (X) contains conventionally ground and processed municipal solid waste incineration ash (gHMVA), wherein the conventionally ground and processed municipal solid waste incineration ash (gHMVA) has a particle size of < 200 μm, and contains thermally incinerated municipal solid waste (H), and is not subject to any material alteration and / or thermal treatment except during the incineration of the municipal solid waste (H) and / or after the conventional incineration and processing of the municipal solid waste (H).

This invention discloses a system and process for the resource recovery of fly ash from municipal solid waste incineration. The system includes a feeding buffer unit, a slurry-washing unit, a low-temperature detoxification unit, a water treatment unit, and a tailings resource recovery unit. The slurry-washing unit includes a primary washing and dewatering device and a secondary washing and dewatering device. The filtrate from the primary washing and dewatering device is sent to the water treatment unit, and the solid ash from the secondary washing and dewatering device is fed into the preheating tank of the low-temperature detoxification unit. The low-temperature detoxification unit includes a preheating tank, a detoxification reactor, an energy recovery component, and a dewatering device arranged sequentially. The steam exhaust port of the detoxification reactor is connected to the preheating tank. The filtrate outlet of the dewatering device is connected to the preheating tank, and the ash outlet of the dewatering device is connected to the tailings resource recovery unit. The solid material outlet of the water treatment unit is connected to the preheating tank. This invention systematically solves the problem of synergistic treatment of chlorides, heavy metals, and dioxins in fly ash, and simultaneously achieves the resource recovery of fly ash and secondary pollutants.

This invention discloses a small-scale municipal solid waste incineration mechanical grate furnace, relating to the field of waste incineration technology. It includes a foundation, on which an incineration assembly is mounted, and a feeding assembly is mounted on the incineration assembly. A furnace assembly is located on the side of the incineration assembly furthest from the feeding assembly. The small-scale municipal solid waste incineration mechanical grate furnace of this invention employs a convex eccentric grate plate combination structure, which performs continuous reciprocating rotational motion under the drive of a drive assembly. During this motion, it forms directional compression, shearing, and agitation effects with the furnace wall, powerfully crushing large pieces of waste and loosening the material layer. This completely solves the defects of traditional grates, such as only pushing without stirring, dense and oxygen-deficient material layers, and localized burn-through. The waste remains loose, uniform, and tumbled on the grate, ensuring full contact with combustion air and achieving complete combustion. This significantly reduces the slag loss on ignition rate, making it particularly suitable for incinerating low-calorific-value municipal solid waste in high-altitude and cold regions.

This invention relates to the field of environmental protection technology, and more particularly to a municipal solid waste incineration fly ash treatment device, comprising an ash discharge unit, which includes an inlet pipe and an outlet pipe, a junction pipe disposed between the inlet pipe and the outlet pipe, and an ash accumulation chamber disposed at the bottom of the junction pipe; and an ash removal unit, which includes a drive assembly disposed outside the junction pipe, an installation assembly disposed inside the junction pipe and connected to the drive assembly, and a filter assembly disposed on the installation assembly. In this municipal solid waste incineration fly ash treatment device, the filter assembly rotates within the junction pipe, filtering the fly ash entering the junction pipe and exiting through the outlet pipe. As the filter assembly passes through the inlet pipe and the junction pipe, the fly ash reverses its flow, achieving a cleaning effect and increasing the service life of the filter assembly.

The utility model relates to the technical field of leachate back-spraying, and discloses a leachate back-spraying device for a household garbage incineration plant, which comprises an incinerator and a spraying pump arranged at the side part of the incinerator, the outlet end of the spraying pump is connected with a conveying pipe, the outlet end of the conveying pipe is connected with a flow dividing pipe, and the flow dividing pipe is connected with the incinerator. A plurality of spraying pipes are arranged on the side, close to the incinerator, of the flow dividing pipe and extend into a hearth of the incinerator. According to the percolate back-spraying device, the rotating water wheel, the output shaft and the cleaning rod with the bristles are integrated, the cleaning mechanism is driven through the energy of fluid, spraying holes can be continuously prevented from being blocked without external power, the spraying head is automatically closed in the non-spraying stage through the design of a normally-closed opening and closing plate, harmful smoke is effectively isolated, smoothness of the spraying holes is doubly guaranteed, and the percolate back-spraying device is convenient to use. Torque output is improved through the multi-stage impeller design, powerful cleaning is ensured, quick disassembly and maintenance are facilitated through the thread and flange connection mode, and the overall structure remarkably reduces the maintenance frequency and cleaning difficulty of the spray head.

This invention provides a method for treating fly ash from municipal solid waste incineration, belonging to the field of solid waste treatment technology. The invention first employs water leaching for dechlorination, followed by acid leaching to dissolve calcium ions and separate calcium from heavy metals. The calcium-containing filtrate is then treated with an alkaline reagent to precipitate calcium. The resulting calcium sludge solid phase is combined with the residue and granulated. By controlling the pressing conditions and size of the solid particles, the subsequent thermal treatment process is facilitated to decompose dioxins while simultaneously stabilizing heavy metals, resulting in harmless products. The treatment method of this invention ensures that the concentrations of soluble chlorine, leached heavy metals, and dioxins in the treated product fully meet standards, achieving harmless, reduced-volume, and resource-based treatment of municipal solid waste incineration fly ash.

This invention discloses a small-scale municipal solid waste incineration system based on plasma coupling, comprising an incinerator body, a feeding assembly, a plasma ignition torch, a propulsion assembly, and a flue gas outlet. The incinerator body has a feeding inlet at one end and a flue gas outlet at the other end. A feeding assembly is installed at the feeding inlet, and a propulsion assembly is located near the feeding inlet on one side of the incinerator body. Several plasma ignition torches are mounted on the incinerator body. This invention uses plasma ignition torches as the core ignition component. Plasma possesses high temperature and high activity characteristics, enabling rapid ignition of waste, solving the problems of slow ignition speed and unstable ignition in traditional ignition methods. Simultaneously, the plasma ignition torches are respectively positioned on the furnace walls of the first and second furnace bodies near the flue gas outlet, and with the precise gas supply from the combustion-supporting assembly, complete primary combustion of waste and secondary incineration of flue gas are achieved.

This invention relates to the field of slag recycling technology, specifically a method for sorting slag after municipal solid waste incineration, comprising the following steps: S1. Feeding and crushing step: The mixed slag produced after municipal solid waste incineration is continuously conveyed to the crushing section via a belt conveyor. A crusher is used to crush large pieces of material in the slag, obtaining crushed material with uniform particle size; S2. Density sorting step: The crushed material is fed into a jig, where water flotation is performed using pulsating water flow. Based on the density differences of the material, heavy metal materials with a density greater than a preset threshold are sorted out. The heavy metal materials include at least copper and steel. This method for sorting slag after municipal solid waste incineration not only treats the slag and avoids environmental pollution, but also sorts out metals for recycling and reuse, and sorts out building material aggregates as raw materials for brick blocks, enabling resource recycling, environmentally friendly recycling, and maximizing economic benefits.

The present application relates to a kind of low carbon cementitious material and its preparation method and application, the preparation method includes the following steps: raw material pretreatment, mixing, reaction, filtration drying, mixing calcination and adding reinforcing agent.The present application prepares cementitious material by synergistically disposing municipal solid waste incineration bottom ash, municipal solid waste incineration fly ash, electrolytic manganese residue and regenerated micro powder, realizes the unity of solid waste resource, almost zero dissolution of heavy metal, cementitious material high performance and low carbon.

The application discloses a kind of domestic waste incineration fly ash washing dechlorination system and process, including fly ash deep dechlorination reactor and with the dechlorination agent dosing device of fly ash deep dechlorination reactor, stirring device, micro-nano aeration device, electrolytic device power supply and temperature control device.The application provides the treatment process for significantly reducing the chlorine content in fly ash by aiming at the dechlorination treatment needs of waste incineration fly ash washing end, and provides significant convenience conditions for the resource utilization of domestic waste incineration fly ash.The main innovation of the process is that after four processes of break point dechlorination, fugitive dechlorination, catalytic oxidation dechlorination and electrolytic dechlorination, the chlorine content in waste incineration fly ash can be significantly reduced.After the process treatment, the chlorine content in fly ash after fly ash washing dechlorination process treatment can be less than 0.1%, which is much lower than the chlorine content in fly ash after waste incineration fly ash washing after countercurrent rinsing, and the process runs stably.

This invention belongs to the field of hazardous waste resource utilization and discloses a one-step smoldering method for preparing ceramsite from municipal solid waste incineration fly ash, comprising the following steps: (1) using bentonite as an additive containing silica-alumina minerals, mixing municipal solid waste incineration fly ash with biomass raw materials and bentonite to obtain a mixture; (2) granulating the mixture into powder to obtain raw ceramsite balls; (3) mixing the raw ceramsite with quartz sand and loading it into a smoldering device, and starting the heater of the smoldering device for smoldering heat treatment to obtain the finished ceramsite product. This invention uses biomass raw materials and bentonite in combination with municipal solid waste incineration fly ash to prepare raw ceramsite, which is then smoldered and sintered. By using smoldering technology, it realizes the preparation of safe ceramsite products from municipal solid waste incineration fly ash, greatly reducing the disposal cost of municipal solid waste incineration fly ash and solving the problem of huge energy consumption and high cost of traditional sintering process for fly ash disposal.

This utility model belongs to the field of waste incineration treatment, and in particular, it is a metal sorting device for municipal solid waste incineration slag. Addressing the problem that existing devices, while capable of magnetically adsorbing metal, easily accumulate non-magnetic materials on the adsorption surface, requiring manual cleaning and resulting in poor continuity, the following solution is proposed: It includes a conveyor and a sorting mechanism for screening out metal. The sorting mechanism is positioned above the conveyor and includes a mounting frame and an electromagnetic suction block. The mounting frame is located above the conveyor, and the electromagnetic suction block is fixedly installed inside the mounting frame. When the incinerated and pulverized waste slag is conveyed by the conveyor, it can cooperate with the sorting mechanism to achieve continuous metal screening and collection. Furthermore, multi-stage transmission enables the linkage of the rotating drum, scraper, and brush drum, allowing for device cleaning without manual intervention.

This invention relates to the field of slag resource utilization and intelligent sorting control technology. More specifically, it relates to a digital sorting method for slag after municipal solid waste incineration, applied to the slag disposal production line of a municipal solid waste incineration plant. The method establishes a belt conveyor spatiotemporal coordinate system, generates unified sorting event records, particle digital profiles, and risk expansion occupancy grids based on multimodal acquisition data; combines component probability, path confidence, and execution footprint calibration library to generate and prune candidate actions, constructing scheduling conflict clusters, a spatiotemporal conflict matrix, and a separation benefit matrix, and outputs the start and stop sequence of the diversion execution array in the rolling time domain; and generates error attribution labels based on sorting quality feedback to correct prediction, execution, and feeding parameters, thereby improving slag metal recovery, aggregate purity, and sorting stability.

This invention relates to a fly ash granulation and pelletizing system, a fly ash low-temperature pyrolysis treatment system and method, belonging to the technical field of fly ash treatment for municipal solid waste incineration. The fly ash granulation and pelletizing system includes a feeding device, a granulator, a crusher, and a fly ash feed hopper arranged sequentially along the material flow direction; the feed hopper cover of the granulator is provided with a fly ash inlet; the lower part of the fly ash feed hopper is provided with a fly ash discharge port, and a fly ash discharge valve is provided at the fly ash discharge port. This invention granulates fly ash through a granulation and crushing process, forming a mixture with a particle size of 50μm~10mm and a bulk density of 1~1.5t / m³. 3 This significantly improves the throughput and operational stability of the pyrolysis process.

A system and a method for exhaust emission modeling and analysis of a municipal solid waste incineration process are provided. The system includes: a module for building a whole-process numerical simulation model under reference operating conditions by coupling multiple software, a module for acquiring simulation mechanism data under multiple operating conditions, a module for building a MIMO-LRDT-based exhaust emission model, and a module for single / double-factor-based exhaust emission analysis, where the module for building the whole-process numerical simulation model under reference operating conditions by coupling multiple software is connected to the module for acquiring simulation mechanism data under multiple operating conditions; the module for acquiring simulation mechanism data under multiple operating conditions is connected to the module for building the MIMO-LRDT-based exhaust emission model; and the module for building the MIMO-LRDT-based exhaust emission model is connected to the module for single / double-factor-based exhaust emission analysis.

This invention discloses a method for land reclamation using dredged sludge, municipal solid waste incineration slag, and fly ash, comprising the following steps: S1: raw material pretreatment; S2: mixing the pretreated dredged sludge, slag, and fly ash with bentonite, soil stabilizer, and water to obtain three pumpable materials, namely material A, material B, and material C; S3: pumping the three materials to a designated reclamation area for underwater casting to obtain a sandwich-type seepage-proof protective structure that is wrapped from the inside out, effectively sealing pollutants inside the structure; S4: curing and inspection. This invention transforms hazardous waste fly ash into part of the land reclamation engineering material. Through the multi-layered low-permeability solidified body and the encapsulation structure, the dual effects of physical isolation and chemical stabilization completely eliminate the risk of leaching of pollutants such as heavy metals and dioxins, solving the problem of their safe disposal.