73 results about "Waste combustion" patented technology

The invention relates to the technical field of battery waste management and control, in particular to a battery production waste combustion risk intelligent early warning and disposal system. The system comprises a data acquisition module, a risk prediction module, an early warning management module, a disposal management module, a feedback optimization module and a parameter optimization module. The data acquisition module acquires waste multi-source monitoring data within a first preset time period; the risk prediction module trains a combustion risk prediction model accordingly; the early warning management module obtains real-time monitoring data in a second preset time period and executes early warning operation; the disposal management module executes disposal operation in a third preset time period according to the early warning result data; the feedback optimization module optimizes the prediction model in combination with early warning and disposal results; and the parameter optimization module configures an optimization target based on historical data and executes parameter directional optimization. The system can realize comprehensive monitoring, accurate early warning, effective disposal and dynamic optimization of the waste combustion risk.

Foam edge waste may be shredded or ground into foam particles rather than discarding them. The particles may be mixed with an adhesive and subject to high temperature and high pressure to form into new foam bodies with configurable densities. Utilizing discarded foam sections this way reduces the waste of foam, reduces environmental pollution caused by foam waste combustion, offers more environmental protection and saves resources. The resulting foam articles have reduced water retention and provide superior comfort by making a foam with consistent properties from inconsistent materials.

The utility model discloses an efficient solid waste treatment device which comprises an incinerator used for combusting solid waste, a pretreatment assembly is installed on the incinerator and comprises a smashing box and an extrusion box which are communicated with each other, and the smashing box is communicated with the incinerator. An air cylinder, a pressing plate fixedly connected with the air cylinder, a storage plate matched with the pressing plate and a push plate moving on the storage plate are arranged in the extrusion box, the air cylinder is installed on the inner wall of the extrusion box, an electric push rod fixedly connected with the push plate is installed on the extrusion box, a plurality of drainage holes are formed in the storage plate, and a motor is installed on the smashing box. The solid waste pre-treatment device has the advantages that solid waste can be pre-treated before being combusted, the size of the solid waste is reduced, the solid waste can be combusted more sufficiently, water in the solid waste is removed, the solid waste combustion speed is increased, and the solid waste can be recycled. The combustion efficiency is further improved and the practicability is enhanced.

The invention discloses a device and a method for treating and recycling radioactive CO2 gas in nuclear-grade waste combustion products. The device comprises a combustion unit, a combustion unit and a recycling unit, the filtering unit is connected with the combustion unit and used for filtering mixed gas containing radioactive CO2 generated in the nuclear-grade waste combustion process; the cooling unit is connected with the filtering unit; the purification unit is connected with the cooling unit; the trapping and regenerating unit is connected with the purifying unit; and the circulating unit is connected with the combustion unit and the trapping and regenerating unit. The device is simple in structure, the adsorption material is convenient to regenerate and replace, the device can be repeatedly used for a long time, CO2 can be selectively adsorbed from nuclear power plant mixed waste gas or other mixed gas, the development requirements of carbon emission control and carbon neutralization are met, environmental radiation pollution caused by nuclear power plant waste gas or other waste gas in the nature can be relieved, and the environmental pollution is reduced. Meanwhile, carbon isotope resources can be effectively recycled, the process is safe and controllable, and the risk of radioactive substance leakage is avoided.

The invention discloses an ignition angle correction method and device, equipment and a storage medium. The ignition angle correction method and device are used for correcting the ignition angle of an air cylinder. The method comprises the following steps: acquiring AI50 corresponding to each cylinder of a target vehicle based on a combustion analyzer; an AI50 mean value is obtained based on the AI50 corresponding to each air cylinder; and the ignition angle corresponding to each air cylinder is corrected based on the AI50 mean value. Namely, in the embodiment of the invention, the corresponding ignition angles are corrected according to the waste combustion conditions in the different air cylinders, then the ignition angles of all the air cylinders can be accurately and independently calibrated, the combustion consistency of all the air cylinders of the engine is guaranteed, meanwhile, tail gas emission is reduced, fuel oil consumption is reduced, and energy conservation and environmental protection are achieved.

The utility model discloses a stepped combustion furnace for solid hazardous waste disposal, and belongs to the technical field of solid hazardous waste combustion furnaces. Comprising a furnace body upper part and a furnace body lower part which are vertically connected and internally communicated, a feeding hole is formed in the furnace body upper part, a scattering device is arranged below the feeding hole, and the scattering device is positioned in the furnace body upper part; the bottom face of the lower portion of the furnace body is of a step-shaped structure, each layer of the step-shaped structure is connected with an air cannon air inlet pipeline, one end of each air cannon air inlet pipeline is located outside the furnace body and used for being connected with an air cannon device, and the other end of each air cannon air inlet pipeline extends into the furnace body and is connected with an air cannon pipeline nozzle. According to the utility model, the stepped design is adopted, so that more materials are not easy to store; a plurality of air cannons are arranged at each step for cleaning and blowing, so that the treated solid wastes can be effectively and timely cleaned; the problem that solid hazardous waste is accumulated and bonded together after being combusted in a combustion furnace and is difficult to clean is solved.

Disclosed is a method for controlling a sliding speed of a fire grate segment of a waste incinerator, comprising the following steps: acquiring a flame image in a furnace, and determining a flame parameter of the flame image on the basis of the flame image; acquiring a parameter related to soft measurement modeling of a material layer on a fire grate segment, so as to obtain a parameter of the material layer, parameters of the material layer comprising thickness of the material layer, degree of offset between two sides of the material layer, and area of the material layer; inputting the flame parameter and the parameter of the material layer into a parameter fusion model, to generate a waste incineration parameter, and determining the speed of waste combustion on the basis of the waste incineration parameter, the waste incineration parameter being the time required for waste incineration; determining the intensity of waste combustion on the basis of the speed of waste combustion, determining the position of the flame on the fire grate segment on the basis of the intensity of waste combustion, and determining the sliding speed of the fire grate segment on the basis of the position of the flame on the fire grate segment. This resolves the problem in the prior art that it is necessary to manually determine the sliding speed required by a fire grate.

The invention discloses an internal rotation type anti-slagging solid waste efficient combustion / carbonization device and method. The device comprises a feeding system, an air supply system, a combustion / carbonization system and a rotating shaft. The invention provides an internal rotation type rotating shaft with shoveling plates in a furnace, which can effectively prevent solid from slagging in a high-temperature environment. And a gas channel is formed in the rotating shaft, so that contact and mixing of the solid waste and air are further promoted, and meanwhile, the rotating shaft is cooled. Mixing in the gas-solid reaction process is enhanced, growth of ash in the thermochemical process is destroyed, the purposes of improving the waste combustion / carbonization efficiency and preventing slag bonding are achieved, meanwhile, cooling air is introduced into the low-speed rotary stirrer, and contact between fuel and air is promoted while high-temperature cooling of the low-speed rotary stirrer is guaranteed.

The invention relates to the technical field of waste heat destroying, in particular to a waste heat destroying device which comprises a furnace body composed of a lower diameter expanding section and an upper cylindrical section, and a combustion chamber is formed in the lower diameter expanding section and used for combusting and decomposing waste; the center of the top end of the cylindrical section at the upper part is communicated and connected with a feeding pipe, a preheating pipe communicated with the feeding pipe is fixed in the cylindrical section, and a carbonization chamber is formed in the preheating pipe and is used for preheating and carbonizing wastes; the internal space of the furnace body is divided into four functional areas through the preheating pipe and the partition pipe, namely the combustion chamber, the carbonization chamber, the flue gas channel and the particle settling cavity, flue gas generated by the combustion chamber sequentially flows through the flue gas channel and the particle settling cavity and is finally discharged through the gas outlet pipe, and based on a flue dust turning-back mechanism arranged in the flue gas channel, the flue gas can be fully combusted through the forced baffling effect. Large-particle fly ash collides with the wall surface and then falls to the bottom of the combustion chamber for re-combustion, so that an upward path of smoke dust is effectively blocked.

An optical diagnosis system for ignition of single-particle excavate waste includes: an excavate waste combustion device, an excavate waste feeding device, an oxidant supply device, a flow monitoring device, an observation device and a flue gas analysis device. The excavate waste feeding device cooperates with the excavate waste combustion device, the oxidant supply device is connected to the excavate waste combustion device via the flow monitoring device, the flue gas analysis device is connected to the excavate waste combustion device, and the observation device cooperates with the excavate waste combustion device. Excavate waste particles are automatically conveyed by a slide rail bracket, and particles are prevented from falling off due to thermal expansion by adopting a hoisting tray. A flow stabilizing plate is added at a bottom of the combustion device, and the captured image is processed to achieve high-precision judgment of the ignition moment.

The present invention belongs to the technical field of the incinerator equipment, and particularly relates to a small-scale domestic waste incinerator and a using method thereof. The incinerator includes a drying pyrolysis chamber and a combustion chamber arranged over a grate assembly of the waste incinerator, a secondary combustion chamber is in communication with the upper portion of the combustion chamber, a position in proximity to the upper portion of the combustion chamber is provided with a pyrolysis gas nozzle, a drying pyrolysis chamber outlet flue duct with an induced draft fan is installed at a position in proximity to the upper end of the drying pyrolysis chamber, the drying pyrolysis chamber outlet flue duct is in connection with a pyrolysis gas nozzle through a condenser, a diversion chamber is situated between the same side of the combustion chamber and the secondary combustion chamber and the drying pyrolysis chamber, and the drying pyrolysis chamber is longitudinally provided with a flue gas nozzle, which is in communication with the diversion chamber. A secondary combustion chamber outlet flue and a circulating flue are arranged at the top of the secondary combustion chamber, the circulating flue is in communication with the diversion chamber, and a guide plate configured to regulate the quantity of the flue gas is arranged at the top of the secondary combustion chamber. In the present invention, the moisture content of the waste entering the incinerator is reduced, the heat value for the waste is increased, so that the requirement of 850 °C for at least 2 seconds in the incinerator can be satisfied without supplementing fuel, and the homogenization of the waste is completed before entering the furnace, which ensures that the temperature and the load fluctuation of the incinerator is relative little, the waste combustion is sufficient, and the ignition loss of the slags is low.

This invention discloses a waste combustion heat recovery device and its usage method, including a base plate, a first water tank, a combustion furnace, a plate heat exchanger, a second water tank, and a flue gas purifier. The first water tank is fixedly installed on one side of the upper surface of the base plate. This invention has the advantages of continuously recovering and utilizing the heat energy generated by the combustion of waste in the waste incinerator through the cooperation of the first water tank, the combustion furnace, the plate heat exchanger, the second water tank, the connecting components, the flue gas purifier, the exhaust pipe, the second water pipe, and the third water pipe. In addition, the waste incinerator can be intermittently fed into the waste incinerator through the feeding component during use, avoiding excessive compression of waste inside the waste incinerator, which would cause incomplete combustion of waste inside the waste incinerator. Furthermore, the waste incinerator can be scraped off the accumulated ash inside the waste incinerator through the ash scraping component after use.

A compact waste combustion system deployed within a portable toilet has a burn chamber that includes a processor, a burner, a trapdoor mechanism configured to seal an entrance to the burn chamber when the compact waste combustion system is operated in a first mode and a waste receptacle configured to feed waste material to the burn chamber through the trapdoor mechanism in a second mode of operation. The processor may be configured to detect presence of a waste in the waste receptacle, configure the system to operate in the second mode and to pass waste into the burn chamber, configure the compact waste combustion system to operate in the first mode after the waste has passed into the burn chamber, and activate the burner when the compact waste combustion system is operated in the first mode and the waste is located in the burn chamber.

The invention relates to the technical field of waste incineration treatment, in particular to a waste incineration boiler control system capable of improving combustion stability, and the system comprises a waste incineration data collection module which collects gas data and temperature data in the incineration process; the waste incineration data analysis and early warning module is used for carrying out incomplete combustion early warning by analyzing the content change trend of different flue gases in the combustion process; the waste incineration data early warning processing module is used for analyzing the waste combustion efficiency in the combustion process and the content of incomplete oxides in flue gas to obtain an air inlet amount adjusting coefficient; and the waste incineration air supply rate control module is used for controlling the air supply rate based on the air supply rate adjusting coefficient. The invention aims to improve the garbage combustion efficiency and combustion stability.

The utility model discloses photovoltaic new energy straw mulching film garbage combustion environment-friendly equipment which comprises combustion equipment, a dust collection cover, a cyclone dust collector, a chimney and a photovoltaic panel. The dust collection cover is integrally mounted at the upper end of the combustion equipment, a smoke outlet pipe at the upper end of the dust collection cover is communicated with the induced draft fan and is communicated with the cyclone dust collector through the induced draft fan, and the cyclone dust collector is communicated with the chimney; the photovoltaic panel is connected with a corresponding photovoltaic power generation system to realize photovoltaic power supply for the combustion environment-friendly equipment; a combustion cavity in which a large amount of air participates twice is formed in the combustion equipment. When the equipment works, straw and mulching film garbage are fed from the material inlet and ignited, sufficient air blown in by the air blower participates in and is combusted for the first time on the lower layer of the combustion equipment, and gas which is not fully combusted is fully combusted again on the upper layer of the combustion equipment; through two times of combustion in which a large amount of air participates, toxic and harmful smoke dust generated by combustion treatment of straw and mulching film garbage can be completely reacted into nontoxic and harmless smoke dust basically.

This utility model discloses a high-efficiency combustion-supporting blower for an incinerator, relating to the field of incinerator technology. It includes: a flue pipe, fixedly connected to a support frame; a blower, fixedly connected to the support frame; a connecting pipe, fixedly connected to the blower; a reciprocating mechanism, mounted on the support frame, for uniformly blowing air into the support frame to ensure more complete waste combustion; and a vibration mechanism, mounted inside a collection frame, for vibrating the support frame to cause the burned ash to fall into the collection frame. By incorporating the reciprocating mechanism, blower, and connecting pipe, uniform airflow is achieved within the support frame, resulting in more thorough waste combustion. The vibration mechanism also ensures that the burned ash falls into the collection frame, preventing dust accumulation and ensuring proper waste combustion.

The invention provides a hearth temperature control method based on III-type fuzzy width and improved experience pool reinforcement learning, which comprises the following steps: acquiring a control input and interference set based on a hearth solid waste combustion process; pID input is constructed, a basic control closed loop is carried out, an ACN structure is constructed, PID parameter online adaptive adjustment is carried out, and ACN adaptive PID is obtained; fitting the ACN adaptive PID in combination with an interval three-type fuzzy system, a width learning system and a shared layer mechanism to obtain an interpretable approximator; empirical definition, priority calculation, uniform sampling, weight correction, smooth updating and empirical reordering are carried out to obtain an efficient empirical utilization mechanism; and calculating a final update quantity, outputting an adaptive update ACN parameter, and obtaining and operating an updatable approximator. According to the method, the training sample utilization efficiency is remarkably enhanced, and the real-time response and resource consumption of the system can be dynamically balanced.

A system for the disposal of menstrual waste that includes the following: a combustion chamber designed to receive and incinerate sanitary waste, wherein the waste incineration chamber receives and incinerates solid menstrual waste, such as used sanitary napkins, and is made of refractory material that can withstand the extremely high temperatures required for effective waste incineration; a heating tray that evenly supports and facilitates the combustion of waste, so that all waste is reduced to ash and gases, with the heat source usually being a gas burner or an electric coil that achieves the correct combustion temperatures and efficiently converts the waste to reduce energy consumption; A catalyst is installed in the exhaust system, which filters toxic gases and removes them from the environment, and through redox reactions helps to neutralize the harmful odors produced during combustion, and gases are mainly converted into carbon dioxide; it is directed into a collection container and can be reused for other purposes after cooling and settling, thus reducing its impact on the environment; An ash pan collects the ash left over after the combustion process, with the removable tray making it possible to take out the ash and reuse it for applications in the production of cement, bricks or money within the framework of sustainable circular economies; a fire extinguishing system for monitoring the internal temperature of the combustion furnace, which has sensors for measuring the internal temperature, wherein the system activates the fire extinguishing mechanism when the core temperature reaches a predetermined safety limit above which the system is operating; and A direct current motor drives a pump to transport the selected extinguishing agent to the heat source, the extinguishing agents used here being water in gas-powered systems and carbon dioxide in electrically heated systems, where flames can be suppressed.

The invention discloses an environment-friendly snow-melting agent based on agricultural and forestry wastes, and relates to the technical field of preparation of snow-melting agents. The environment-friendly snow-melting agent based on the agricultural and forestry wastes is prepared from the following components in parts by weight: agricultural and forestry waste combustion ash, food processing organic waste liquid, polyhydric alcohols, filler, agricultural waste fibers, synthetic paper pulp, a polyacrylate water absorbent, a binder and activated clay. The invention further provides a preparation method of the environment-friendly snow-melting agent based on the agricultural and forestry wastes. The environment-friendly snow-melting agent based on the forestry and agricultural residues is low in cost and stable in snow-melting performance, and the problems that an existing snow-melting agent is high in cost, short in time efficiency, poor in adhesiveness, single in function and poor in stability, and a road surface is prone to secondary icing after snow melting are effectively solved.

The invention relates to the technical field of tail gas treatment, in particular to a radioactive combustible waste combustion furnace tail gas purification treatment system which comprises a combustion unit provided with a radioactive solid waste feeding and conveying mechanism used for conveying radioactive solid waste into the combustion unit at a preset speed; the quenching unit is connected with a smoke outlet of the combustion unit through a smoke pipeline, a spray gun assembly is arranged in the quenching unit and comprises a double-fluid spray gun and a sewage circulation spray gun, and the double-fluid spray gun and the sewage circulation spray gun are used for spraying atomized quenching water into smoke. The radioactive combustible waste combustion furnace tail gas purification treatment system has the beneficial effects that efficient incineration of radioactive solid waste and efficient removal of tail gas pollutants are achieved through multi-stage cooperative treatment, and the system can effectively decompose organic matter, inhibit generation of dioxin and reduce the emission concentration of NOx, SO2, particulate matter, heavy metal and radioactive aerosol.

This invention discloses a horizontal thermal plasma ship waste treatment system, comprising a crushing and conveying device, a plasma pyrolysis gasification combustion device, and a waste heat recovery device. The plasma pyrolysis gasification combustion device is arranged horizontally, positioned below and connected to the crushing and conveying device. The waste heat recovery device includes a flue gas waste heat recovery unit and a cooling unit, both arranged horizontally. The flue gas waste heat recovery unit is connected to the plasma pyrolysis gasification combustion device, and both the flue gas waste heat recovery unit and the plasma pyrolysis gasification combustion device are located within the cooling unit. According to this invention, the horizontal thermal plasma ship waste treatment system can effectively reduce the space occupied on the ship, effectively lower the center of gravity of the plasma pyrolysis gasification combustion device, enhance the anti-sway capability and efficiency of the horizontal thermal plasma ship waste treatment system, and effectively recover the heat generated by waste combustion, thereby improving energy utilization efficiency.

The utility model provides a solid waste combustion chamber conveying structure which comprises a combustion chamber body, the upper end of the combustion chamber body is fixedly connected with a roof, the lower inner wall of the combustion chamber body is fixedly connected with a built-in cavity, an incinerator body is fixedly connected in the built-in cavity, and the upper end of the built-in cavity is fixedly connected with a discharge hopper. A conveying mechanism used for conveying solid waste is installed on the upper side of the roof. When the solid waste incinerator is used, waste is rapidly added into the incinerator body through the conveying mechanism, the incinerator body is controlled to operate to burn the solid waste, and compared with a traditional mode that the solid waste is added through a tool, the time for adding the solid waste into the combustion chamber is shortened, and combustion of the solid waste is facilitated.

A material recovery system for wet ash generated from municipal waste includes infeed storage of wet ash, an oversized and organic removal subsystem, a material sizing subsystem, a metal recovery subsystem, and an aggregate finishing subsystem. The system for material recovery results in the output of commercially usable aggregate material, ferrous materials, and non-ferrous materials. The subsystems of the material recovery system include one or more screens, dryers, feed hoppers, eddy current separators, magnets, crushers, and air classifiers.

The present invention discloses an integrated containerized waste combustion treatment system, which includes an upper container body (1) and a lower container body (2) connected in an upper and lower stacked manner. Inside the upper container body (1), a waste feeding assembly, a combustion furnace assembly, a quenching heat exchanger (3), and a bag filter (4) are successively arranged from front to back; inside the lower container body (2), a filtrate tank (5) below the waste feeding assembly, a cooling water tank (6) and an ash slag tank (7) below the combustion furnace assembly, and a dust collection box (8) located below the bag filter (4) are successively arranged from front to back. The present invention can not only harmlessly treat waste efficiently, but also has a compact overall structure, can be transported as a whole machine, has no civil engineering requirements, and does not require on-site installation. It can not only reduce the installation cost, but also be easy to promote and apply, and is especially suitable for some small and medium-sized waste combustion treatment plants.

[Problem] To provide: a method for producing waste-derived chloroprene that can be used as a raw material for synthetic rubber, while reducing the environmental burden thereof; and a method for producing chloroprene rubber. [Solution] One aspect of the present invention provides a method for producing chloroprene, said method comprising: a preparation step for preparing a fixed carbon source that contains a waste combustion residue; a generation step for generating a chloroprene precursor from the fixed carbon source; and a conversion step for converting the chloroprene precursor into chloroprene.

The utility model discloses a solid waste combustion pollution prevention monitoring device, which belongs to the technical field of monitoring equipment and comprises a monitoring base, a supporting column is fixedly connected to the top end of the monitoring base, an adjusting groove is formed in the surface of the supporting column, and a connecting column is arranged in an inner cavity of the adjusting groove. One end of the connecting column is provided with an adjusting structure for adjusting the height of the connecting column, the other end of the connecting column is fixedly connected with a mounting plate, the bottom end of the mounting plate is provided with an adjusting assembly, the top end of the adjusting assembly penetrates through the mounting plate and is provided with a rotating seat, and the top end of the rotating seat is in bolted connection with an adjusting frame; and an inner cavity of the adjusting frame is rotationally connected with a monitoring camera through a rotating shaft, and a positioning structure is arranged on the surface of the monitoring camera, so that the solid waste combustion pollution prevention and control monitoring range of the monitoring device is enlarged, and the solid waste combustion pollution prevention and control monitoring efficiency of the monitoring device is improved.

- related to the patent application with the title: Destroyers of sanitary - rate with technical characteristics - parameters: - constructive type: cylindric horizontal - with tunnel-type combustion chamber, with post combustion chamber on the flue gas path - fuel: GN - natural gases + green - H2 - thermal power 160 kW -- 1600 kW Pmax 3700 kW - temperature 1250 - 1300°C Tmax 1400°C with continuous online monitoring with analysis, metering and data, storage Sanitary-organic waste destroyer is characterized by the fact that: In addition to the combustion of sanitary -organic waste in a tunnel oven with burners on GN fuel - Natural Gas + Green H2, there is also a combustion of the flue gases in a post-combustion chamber with a burner on GN fuel + Green H2 for the purpose of burning dioxin and furans resulting from the combustion of plastic waste and in view of the classification as pollutants permitted by environmental legislation. The green hydrogen that is used by injecting into the natural gas supply pipeline replacing 20% of the natural gas consumption is produced by a modular station - Hydrogen production Electrolyser at the pressure of 1 ~ 4 bar, which uses solar energy: photovoltaic panels. Advantages: reduces natural gas consumption, increases yield, efficiency reduces costs, reduces harmful substances, burns sanitary - organic waste.

The application provides an intelligent optimization method, system and medium for operation of a waste incineration device. The method comprises: obtaining a preset number of historical input variable data and historical output variable data of the waste incineration device, then classifying the historical input variable data and the corresponding historical output variable data to obtain a training data set and a test data set, obtaining key parameters of a gradient boosting tree and training to obtain an updated gradient boosting tree model, calculating an input variable importance index according to the updated gradient boosting tree model and obtaining an optimized input variable by threshold comparison, processing to obtain a heat efficiency prediction model through a multilayer BP neural network and a particle swarm optimization algorithm, and obtaining optimal input variable feature data after the heat efficiency prediction model is processed by a reinforcement learning algorithm; so that the gradient boosting tree model, the multilayer BP neural network and the particle swarm optimization algorithm are used to realize intelligent optimization of the waste incineration device and reduce the power generation cost of the waste incineration device.

A material recovery system for wet ash generated from municipal waste includes infeed storage of wet ash, an oversized and organic removal subsystem, a material sizing subsystem, a metal recovery subsystem, and an aggregate finishing subsystem. The system for material recovery results in the output of commercially usable aggregate material, ferrous materials, and non-ferrous materials. The subsystems of the material recovery system include one or more screens, dryers, feed hoppers, eddy current separators, magnets, crushers, and air classifiers.

The application relates to a three-dimensional air supply grate, and belongs to the technical field of waste incineration grates. The three-dimensional air supply grate comprises a supporting frame, a plurality of guide sleeves arranged in an array, a plurality of vertically-extended air supply pipes, a heat insulation layer and a plurality of lifting mechanisms. A plurality of grate pieces extending leftward and rightward and arranged at intervals in front and back are arranged on the supporting frame. The axes of the guide sleeves all extend vertically and are fixedly arranged in the plurality of grate pieces. The air supply pipes are slidably arranged in the guide sleeves. The top end of the air supply pipe is closed, and the bottom is provided with an air inlet. A plurality of groups of air outlet holes arranged at intervals in up and down directions are arranged on the top wall of the air supply pipe. The heat insulation layer is arranged below the supporting frame, and the bottom of the air supply pipe is slidably arranged on the heat insulation layer. The plurality of lifting mechanisms are arranged below the heat insulation layer. The lifting output ends of the lifting mechanisms are connected with the air supply pipes, and the air supply pipes are driven to reciprocatingly move up and down. The three-dimensional air supply grate can make oxygen more uniformly penetrate into waste, and improve waste combustion efficiency.