319 results about "Coal fired" patented technology

The application discloses a kind of solid waste-based cementing material of coal-fired power plant and preparation method thereof, belong to building material technical field.The material is made of the following weight parts of raw materials: 50-70 parts of fly ash, 10-30 parts of mineral powder, 10-30 parts of desulfurization gypsum, 1-5 parts of activator, 1-5 parts of seed crystal.The key of its preparation method lies in by implanting pre-synthesized C-S-H seed crystal, as nucleation base point in the hydration process of cementing material, effectively stimulate the potential activity of solid waste, induce the formation of dense hydration product structure.Cementing material prepared by the application has the advantages of high strength, low cost, environmental protection, etc., realizes the high value-added resource utilization of solid waste of coal-fired power plant.

The embodiment of the application provides a kind of multi-parameter collaborative SCR ammonia injection control method, device, equipment and medium, related to coal-fired flue gas denitration technical field, method includes: obtaining the inlet flue gas flow and inlet nitrogen oxide concentration of flue gas inlet flue, according to inlet flue gas flow and inlet nitrogen oxide concentration, calculate theoretical ammonia nitrogen molar ratio;According to theoretical ammonia nitrogen molar ratio and ammonia water concentration correction coefficient, calculate basic ammonia injection amount;Obtain the reaction data of ammonia water and flue gas in reactor, based on reaction data, dynamically adjust basic ammonia injection amount to obtain final ammonia injection amount, and adjust the ammonia injection amount of ammonia injection pipeline to final ammonia injection amount.The application can realize the accurate and efficient control of the ammonia injection amount of SCR ammonia water denitration system.

This invention belongs to the field of coal procurement technology, and relates to a procurement decision-making method and system based on multi-timescale coal demand forecasting. It includes: acquiring power generation influencing factor data at at least two time scales, and generating power generation forecast values ​​corresponding to each time scale based on the power generation influencing factor data; fusing the power generation forecast values ​​at each time scale to obtain a fused power generation forecast value; decomposing the fused power generation forecast value into initial demand quantities for different coal types according to the consumption rate of each generating unit for different coal types, and adjusting the initial demand quantities according to a preset blending strategy to obtain the target demand quantity for each coal type; acquiring coal price time series data for each coal type, and generating future coal price forecast values ​​for each coal type based on the coal price time series data; and determining a procurement decision scheme based on the target demand quantity for each coal type and the coal price forecast value. This invention achieves accurate decision-making and cost control in fuel procurement.

The application discloses a coal-fired power plant water-heat-chemical value-added system for a new power system and an intelligent flexible operation method thereof. The system comprises a coal-fired generator unit, a heat-steam-power coupling subsystem, a water-hydrogen-oxygen coupling subsystem and a carbon-chemical coupling subsystem integrated with the coal-fired generator unit, and is uniformly coordinated by an intelligent collaborative control unit. Solid particle storage flue gas waste heat can be used to quickly produce steam injection into a steam turbine to improve the frequency modulation response speed of the unit. Low-valley electricity is used to electrolyze hydrogen, and by-product oxygen is recycled. Hydrogen and captured carbon dioxide are used to synthesize green methanol to realize carbon resource utilization. Methanol synthesis reaction heat and electrolysis waste heat are recovered in stages. The operation method can intelligently switch and cooperate between fast frequency modulation, hydrogen production by electrolysis and methanol synthesis according to grid instructions and real-time electricity prices, so that the flexibility of the unit, resource utilization and comprehensive benefits are systematically improved.

This invention discloses an intelligent control method and system for ammonia injection in denitrification based on multi-model fusion and AI feedforward, relating to the field of industrial flue gas denitrification and environmental protection technology. The method includes acquiring historical operating data of the denitrification system and establishing a feedforward AI model using offline neural network training; obtaining current operating condition parameters and inputting them into the model to obtain the feedforward ammonia injection precision; receiving special operating condition trigger signals in real time; having the PLC perform hard switching of the model and calling the corresponding special operating condition correction model to calculate the correction bias; acquiring the actual NOx value at the outlet in real time; calculating the fine adjustment amount through a cascaded control dual closed-loop structure; and superimposing the feedforward ammonia injection precision, the correction bias, and the fine adjustment amount to generate the final ammonia injection command. This invention achieves precise and rapid control of ammonia injection under drastically fluctuating operating conditions through the fusion of offline AI feedforward, hard switching of special operating conditions, and cascade feedback, avoiding excessive NOx emissions. It is mainly used for denitrification of coal-fired, glass kiln, and chemical flue gas.

This utility model discloses a dust removal system for a coal-fired boiler, including a raw flue gas inlet pipe connected to the flue gas duct of the coal-fired boiler. Several dust collectors are connected in parallel on the raw flue gas inlet pipe. A conical ash collection structure is provided at the bottom of each dust collector. An ash conveying pipe connecting to an ash silo is provided at the bottom of the conical ash collection structure. An ash conveying control mechanism is provided on the ash conveying pipe. A clean flue gas outlet pipe is provided behind the dust collectors. A blockage removal mechanism and an exhaust mechanism are provided on the ash conveying pipe. The system also includes a PLC controller, whose output is connected to the input of the ash conveying control mechanism, the blockage removal mechanism, and the exhaust mechanism. This utility model adopts a design combining multi-chamber parallel dust collectors with zoned cleaning, optimizing airflow and cleaning rhythm, improving dust removal efficiency and system adaptability, and can be applied to different flue gas load conditions.

The application relates to the field of steam turbine blade processing technology and discloses a coal-fired unit steam turbine low-pressure rotor last-stage blade processing device, which comprises a base and a polishing mechanism, the base is provided with an electric three-jaw chuck, the electric three-jaw chuck clamps a low-pressure rotor last-stage blade, the polishing mechanism comprises a shell and a first rotating shaft, and the first rotating shaft is provided with a polishing wheel; the polishing mechanism further comprises a rotating assembly and a transmission assembly, the rotating assembly comprises a second rotating shaft, the transmission assembly comprises a fixing seat arranged on the shell, a first lifting seat is slidingly arranged on the fixing seat, the first lifting seat is connected with the second rotating shaft, a spherical piece is rotationally arranged in the first lifting seat, and the spherical piece is connected with the first rotating shaft. The coal-fired unit steam turbine low-pressure rotor last-stage blade processing device can automatically adjust the contact angle of the polishing equipment with the blade, and can spray abrasive between the polishing equipment and the blade, so that the polishing effect on the blade is improved.

This disclosure proposes an evaluation method and system for auxiliary coal blending, relating to the field of coal blending technology. The evaluation method for auxiliary coal blending includes the following steps: collecting basic blending data, which includes at least coal blending information, combustion parameters, environmental parameters, and equipment status data; establishing a multi-dimensional analysis model based on the basic blending data, and analyzing the basic blending data through the multi-dimensional analysis model to obtain analysis results; generating visualization charts based on the analysis results at a preset cycle; establishing an A / B comparison analysis mechanism; inputting the blending scheme verified by the A / B comparison analysis, along with the applicable conditions of the blending scheme, into a dynamic knowledge base; and establishing a review mechanism to analyze long-term data trends and continuously optimize the multi-dimensional analysis model and the dynamic knowledge base. This disclosure achieves closed-loop management of the entire process of blending schemes, from data collection, multi-dimensional evaluation, visualization, comparison verification to knowledge accumulation and continuous optimization.

This invention provides an air supply and dust removal device for high-temperature corrosion prevention and control in coal-fired power plant boilers, comprising a cyclone separator and a microporous filter. The cyclone separator includes a separation shell, an air inlet, an exhaust outlet, and a first ash discharge outlet. The separation shell has a cylindrical separation chamber, and the air inlet, exhaust outlet, and first ash discharge outlet are respectively connected to the separation chamber. The air inlet is located at the upper part of the separation shell and is tangent to the outer wall of the separation shell. The exhaust outlet is located at the top of the separation shell, and the first ash discharge outlet is located at the bottom of the separation shell. The microporous filter includes a filter shell and a microporous filter element. The filter shell has an air inlet and an exhaust outlet, with the air inlet connected to the exhaust outlet. The microporous filter element is disposed inside the filter shell. The cyclone separator performs primary dust removal of large particles in the secondary air, and the microporous filter performs secondary dust removal of small particles in the secondary air, thereby achieving the removal of both large and small particles of dust in the secondary air.

The application provides a coal-fired power plant SCR denitration system limited load output and peak capacity evaluation method and device, computing equipment and storage medium, relates to the coal-fired thermal power generating unit technical field. The method is based on online monitoring parameters and equipment design parameters, and the total amount of real-time removal of NO x X is calculated; combined with the key constraints including catalyst activity, ammonia supply capacity and reaction temperature, the operation status of the SCR denitration system is evaluated; the removal of NO x X of the three core constraints of catalyst activity, ammonia supply and reaction temperature is quantified respectively, and the total NO x X removal margin is obtained; based on the coupling relationship between the total NO x X removal margin and the load, the unit load margin and the peak capacity are calculated, the technical blank of denitration system performance evaluation under high load conditions is filled, and support is provided for safe and economic operation of the unit.

The application discloses a layered collaborative control method for auxiliary deaerator pressure stabilization of a molten salt steam generator, builds an auxiliary optimization control layer on the original coordination control system of the unit, and forms a layered collaborative architecture of "MPC optimization decision-CCS execution tracking". The upper layer calculates and rolls over the optimal set values of the molten salt steam pressure, the deaerator pressure and the feedwater temperature in real time based on model predictive control (MPC); the lower layer realizes fast and stable tracking of the set values through three control loops of cascade-ratio control, three-impulse collaborative control and PID control embedded in CCS, and is seamlessly coordinated with the original feedwater and combustion control logic of the unit. The application effectively solves the problems of multivariable strong coupling, large response inertia and strong mode switching impact of the coal-molten salt coupling system in deep load regulation, significantly improves the load response speed, operation safety and low-load economy of the unit, and enhances the accommodation capacity of the power system to new energy.

This invention discloses a multi-parameter coupling-based deep peak-shaving full-condition optimization control method for coal-fired power units. Addressing the problems of existing technologies, this invention constructs a multi-parameter coupling index system, calculates the comprehensive coupling strength between each parameter and the load, and selects core parameters. Dynamic clustering is used to finely divide the full-condition operation from 20% to 100% rated load into multiple operating zones. An LSTM-GRU dual-channel deep learning prediction model is established for each operating zone. A three-layer hierarchical control architecture is designed, comprising load optimization scheduling, boiler-turbine coordination control, and combustion optimization execution. The boiler-turbine coordination layer uses multivariate model predictive control and online self-tuning of multi-objective weights through fuzzy inference. The combustion execution layer uses the NSGA-III multi-objective evolutionary algorithm to optimize air distribution. A constraint-adaptive tuning mechanism based on safety margin is established to form a closed-loop iterative optimization across all operating conditions. This invention can significantly improve the load response speed, main parameter stability, and combustion economy of the unit during wide-load operation.

This invention discloses a flexible controllable combined heat and power (CHP) system and its operation method, belonging to the field of coal-fired power generation and heating technology. The system's thermal storage system includes a low-temperature molten salt tank, a high-temperature molten salt tank, multiple molten salt-steam heat exchangers, a molten salt-water heat exchanger, and an electric heater. The outlet of the low-temperature molten salt tank is connected in two paths to the molten salt inlets of the first and second molten salt-steam heat exchangers, and its outlet is connected to the high-temperature molten salt tank. The outlet of the high-temperature molten salt tank is sequentially connected to the electric heater, the molten salt-water heat exchanger, and the third molten salt-steam heat exchanger before returning to the low-temperature molten salt tank. The steam inlet of the second molten salt-steam heat exchanger is connected to the main steam pipeline, and the steam inlet of the first molten salt-steam heat exchanger is connected to the reheat section pipeline. The water-side inlet of the molten salt-water heat exchanger is connected to the feedwater pipeline, and the steam outlet of the third molten salt-steam heat exchanger is connected to the heating network heat exchanger. This invention achieves flexible control of the heating load, effectively decouples the constraint of heat-driven power generation, and improves the unit's deep peak-shaving capability and operational safety.

The invention relates to a gradual coal-fired pulverized coal boiler pipeline connecting system and method, and belongs to the technical field of coal-fired boilers, and the gradual coal-fired pulverized coal boiler pipeline connecting system is sequentially provided with a first branch, a second branch and a third branch; a primary fan is arranged at the head end of the first branch, the air outlet end of the primary fan is divided into two side paths, one side path is communicated with a coal mill through an air preheater, the other side path is communicated with the coal mill through a cold air adjusting valve, the air outlet end of the coal mill is connected with a pulverized coal burner through a primary air pipe, and the pulverized coal burner is arranged at the bottom of the boiler; a secondary air fan is arranged at the end of the second branch, the air outlet end of the secondary air fan is communicated with an air preheater, the air outlet end of the air preheater is connected with a plurality of fourth branches through secondary air pipes, the fourth branches are arranged at intervals in the height direction of the boiler, and a more uniform and longer combustion zone is formed and can be regulated and controlled through a regulating valve; the air outlet end of the boiler is connected with an air preheater through a third branch, and the air outlet end of the air preheater is connected with a chimney.

This utility model discloses a desulfurization system for a coal-fired boiler, including a desulfurization tower connected to the flue gas duct of the coal-fired boiler via a flue gas inlet pipe. A wet electrostatic precipitator, an induced draft fan, and a chimney are sequentially installed on the flue gas outlet pipe behind the desulfurization tower. The desulfurization tower has multiple layers of spray pipes inside, and a slurry pool is located at the bottom of the tower. The slurry pool is connected to the spray pipes via a circulation pipe, which is equipped with a circulation pump. An oxidation pipe is connected to the top of the desulfurization tower, and an oxidation fan is installed on the oxidation pipe. A desulfurizing agent preparation mechanism is connected to the slurry pool at the bottom of the desulfurization tower. A slurry treatment mechanism is also connected to the bottom of the desulfurization tower via a pipe. This utility model optimizes process design, enhances material circulation, and implements precise parameter control. By utilizing spray layer atomization and forced oxidation by the oxidation fan, it ensures desulfurization effectiveness, improves the overall operating efficiency of the system, and enhances resource utilization through gypsum dewatering and filtrate recycling.

The application discloses a drainage system applied to flexible operation of a supercritical coal-fired boiler. The application is characterized in that a temperature sensor group and a drainage pipe are arranged on a lateral wall inlet header of a horizontal flue, and an electric regulating valve on the drainage pipe is controlled according to a first temperature signal and a second temperature signal measured by the temperature sensor group and a main steam pressure signal and a main steam flow signal taken from a boiler automatic control system, so that the condensed accumulated water in the header is discharged to a boiler drainage expander through the drainage pipe, and the condensed accumulated water in the inlet header of the superheater is prevented from causing water blockage in the header, thereby ensuring normal use of the pipeline and safe operation of the boiler.

This invention relates to the field of combustion equipment technology, specifically a coal-fired swirl burner and its control method for flexible co-firing of biomass gas at a wide blending ratio. The burner features a biomass gas swirl annular channel coaxially fitted between the primary air duct and the inner secondary air duct. The annular channel contains swirl blades and a conical ring. The biomass gas nozzle is located radially outward from the primary air duct outlet, allowing the biomass gas to be precisely injected into the shear layer between the primary and inner secondary air ducts in a controllable swirl pattern. The control method coordinates three parameters: biomass gas mass flow rate, swirl blade inclination angle, and nozzle flow area. At low blending ratios, the flow area is reduced while increasing swirl intensity; at high blending ratios, the flow area is increased while optimizing swirl intensity. Combined with real-time feedback fine-tuning from multi-dimensional flue gas signals, flexible and stable combustion is achieved across the entire operating range from 0% to 100%, while suppressing nitrogen oxide formation.

This invention relates to the field of denitrification catalyst technology, and in particular to an arsenic- and alkali-poisoning-resistant denitrification catalyst and its preparation method. The denitrification catalyst comprises: a support, an active component, and a co-catalyst; the mass ratio of the active component to the support is (3-15):100; the mass ratio of the co-catalyst to the support is (3-8):100; the support comprises: calcium-based bentonite, attapulgite, and nano-cerium oxide; the active component is an oxide of vanadium, chromium, samarium, or niobium; and the co-catalyst is one or more oxides of molybdenum, tungsten, or praseodymium. This invention prepares a multi-component mesoporous composite oxide denitrification catalyst with excellent resistance to arsenic and alkali metal poisoning through multiple steps, solving the problem of poor arsenic and alkali resistance in traditional denitrification catalysts. It is suitable for nitrogen oxide emission control under flue gas conditions in coal-fired power plants, biomass boilers, and the glass industry.

This invention belongs to the technical field of CO2 capture and resource utilization in coal-fired power plants, and relates to a CO2 capture-methanation system and method based on catalyst-coupled waste heat. It includes: a CO2 capture unit, comprising a fixed-bed adsorption tower and an adsorbent regeneration device, the fixed-bed adsorption tower being connected to the adsorbent regeneration device; a catalytic methanation unit, comprising a fixed-bed reactor, the fixed-bed reactor being connected to the adsorbent regeneration device; a waste heat utilization unit, comprising a heat exchanger and a heat transfer oil circulation system, the cold-side outlet of the heat exchanger being connected to the heat transfer oil circulation system, the heat transfer oil circulation system being connected to both the adsorbent regeneration device and the fixed-bed reactor; and a solid waste backfilling unit, comprising a mineralization reaction tank, the mineralization reaction tank being connected to the fixed-bed reactor and the adsorbent regeneration device. This invention achieves synergy between CO2 capture, conversion, waste heat utilization, and solid waste backfilling, improving the system's economic and environmental benefits.

This invention provides an automatic non-destructive testing device for pipelines in coal-fired power plants, comprising: a U-shaped testing base, a U-shaped testing frame, and at least two testing probes. The U-shaped testing base includes a base plate, a first support plate, and a second support plate. The first and second support plates are respectively connected to opposite ends of the base plate, forming a U-shaped structure and enclosing an installation space. The first and second support plates together support the pipeline. The U-shaped testing frame is slidably connected to the U-shaped testing base and located within the installation space, allowing reciprocating movement along the direction from the first support plate to the second support plate. The U-shaped testing frame has a receiving space for accommodating the pipeline. The testing probes are connected to the U-shaped testing frame and located within the receiving space. By slidably connecting the U-shaped testing frame to the receiving space of the U-shaped testing base, the testing path of the testing probes is fixed, avoiding inconsistent paths during manual testing and ensuring the consistency and traceability of testing data.

The present application relates to a kind of shadow account-based steam turbine energy-saving operation adjustment method and system, belong to coal-fired unit steam turbine adjustment technical field.It includes the following steps: collecting unit steam turbine side operating parameters and encapsulating as cold end regenerative state package, construct corresponding different heat loss causes shadow entry, calculate each entry heat loss value and sort generation shadow account book;Combining with equipment safety boundary, parameter coupling relationship, parameter effect time delay etc.Construction parameter linkage corridor, under the corridor constraint, shadow entry is parsed into adjustment action and is sorted to form serial operation sequence, is issued to distributed control system execution;Collecting adjusted operating parameter feedback generation operation receipt, dynamically update shadow entry actionable confidence and parameter linkage corridor, and data is stored in historical strategy library.The present application can realize heat loss unified quantization sorting and multi-parameter collaborative safety adjustment, form self-learning iterative closed loop, effectively improve unit operation stability, reduce coal-fired unit heat consumption.

The embodiment of the present disclosure provides a fuel processing device and a thermal power plant energy-saving system, the fuel processing device comprises a mounting frame, a processing box is embedded at the top of the mounting frame, a crushing assembly and a screening assembly are respectively arranged in the processing box, and a discharge port at the bottom of the processing box is communicated with a feeding mechanism; a drying mechanism is arranged on one side of the mounting frame, and the feeding mechanism is communicated with the drying mechanism. The crushing assembly, the screening assembly and the drying mechanism arranged by the fuel processing device can crush, screen and dry the coal of the thermal power plant, so that the quality of the coal of the thermal power plant is improved, the combustion of the coal is stabilized, the combustion efficiency of the coal is improved, the loss caused by incomplete combustion of the fuel is reduced, and the high combustion rate of the coal of the thermal power plant is ensured.

The application discloses a solid waste heat storage system of a CFB boiler based on flue gas heating and a method thereof. The solid waste heat storage system of the CFB boiler based on flue gas heating comprises a coal-fired boiler system and a solid waste heat storage device. The solid waste heat storage device comprises a solid waste heat storage layer and a heat exchange pipeline which can exchange heat with each other. The heat exchange pipeline comprises a flue gas heat exchange pipeline, a first steam heat exchange pipeline and a second steam heat exchange pipeline. The flue gas pipeline is arranged in parallel with a cyclone separator and a fourth valve. The first steam heat exchange pipeline is arranged in parallel with a superheater and a first valve. The second steam heat exchange pipeline is arranged in parallel with a reheater and a second valve. According to the solid waste heat storage system of the CFB boiler based on flue gas heating, when the boiler enters a fire pressure operation state, the main steam and the reheated steam are heated by the solid waste heat storage layer, and the fire pressure time length of the boiler is prolonged.

This invention discloses a method and system for autonomous decision-making control of coal-fired power units under all operating conditions. The method includes: real-time acquisition and intelligent fusion of multi-source heterogeneous data; identification of monitoring blind spots and execution of blind spot data completion or validity verification; construction of an intelligent control system architecture covering all operating conditions of the unit, decentralizing the functions of the plant-level monitoring information system to the production control area; acquisition of electromagnetic radiation interference characteristic parameters and environmental interference characteristic parameters, and implementation of electromagnetic radiation interference suppression or environmental interference correction based on judgment conditions; fusion of a large-scale artificial intelligence model with a dynamic feature decoupling network and a decision knowledge graph to form a quasi-expert fuzzy decision-making system, executing an integrated control strategy of intelligent control, cruise control, and monitoring; and construction of a high-fidelity digital twin parallel system for offline verification and iterative optimization of the control strategy. This invention achieves autonomous decision-making and near-zero human intervention for coal-fired power units under all operating conditions, improving operational safety and economy.

The present disclosure discloses a synergistic control method and device for emissions, electronic equipment and storage medium. According to the present application, the precise prediction and uncertainty quantification of nitrogen oxide emission concentration are realized through a probability prediction model, and the interpretable emission control rules are extracted and synergistically fused with the preset traditional control strategy to optimize the control logic, thereby improving the control response efficiency under transient operating conditions. Therefore, the technical problem of control instruction lag caused by insufficient calculation efficiency and excessively high load change rate when using model predictive control for transient operating condition control in the prior art can be solved, and the peak breakthrough of nitrogen oxide emission limit value is further triggered. The technical effects of improving the timeliness and accuracy of nitrogen oxide emission control of coal-fired boilers, avoiding emission exceeding the standard, ensuring environmental protection compliance of the unit, and optimizing economic operation indicators are achieved.

The application discloses a kind of with load decoupling's coal circulating fluidized bed boiler bed temperature independent regulation method, solve the existing boiler bed temperature and boiler load coupling, cannot realize the problem of boiler bed temperature independent regulation and stability;With furnace differential pressure as the second PID2 regulator input value PV2 is set, the output value of second PID2 regulator is used as the control input signal of the variable frequency motor of boiler ash cooler discharge capacity, realize the adjustment of the circulating ash of the above two conditions, and the set value SP1 and measured value PV1 of bed temperature are used as the input value of first PID1 regulator, the output value of first PID regulator is used as the differential pressure set value SP2 of second PID2 regulator, through the coupling connection of first PID1 and second PID2, realize with bed temperature change as input, with the control input signal of the variable frequency motor of boiler ash cooler discharge capacity as execution unit, realize the stable regulation of boiler bed temperature and bed temperature and boiler load decoupling.

The application discloses a biomass gas coupling coal-fired boiler alkali metal slagging tendency intelligent prediction method and system, relates to the field of slagging tendency prediction, obtains flue gas temperature data of a target area of a boiler convection heating surface, obtains ash fusion characteristic temperature and alkali metal element content data of mixed fuel fed into the boiler, performs self-adaptive correlation calculation of ash temperature-liquid phase yield under physical constraints, calculates coupling adhesion force, generates particle surface equivalent adhesion strength distribution, based on the particle surface equivalent adhesion strength distribution, counts particle turbulent collision physical parameters, determines effective collision adhesion efficiency based on energy competition, calculates the agglomeration growth rate of ash particles in a flow field, outputs ash particle agglomerate spatial growth configuration, according to the ash particle agglomerate spatial growth configuration, performs macroscopic mechanical characteristic analysis and bridge stability determination on the accumulation body of the throat of a cold ash bucket, and outputs an ash bucket blockage risk level, thereby effectively solving the cold ash bucket blockage problem.

The utility model relates to an integrated coal-fired power plant heavy metal-containing sewage treatment system and belongs to the technical field of water pollution control. The system is connected with a grit chamber, a microfiltration membrane filter, an ozone catalytic oxidation unit, a photocatalytic oxidation unit, an electrochemical oxidation unit, an ion exchange unit, a magnetic nano adsorption unit and an anaerobic biological filter in sequence through a water inlet through a grid. The anaerobic biological filter is connected with a membrane biological reactor and a reverse osmosis system through an aerobic biological reactor. The utility model system adopts compact design, has small land occupation, low operation cost, stable and efficient treatment effect, and the effluent quality reaches the national discharge standard or reuse requirement. The utility model not only significantly improves the removal efficiency of heavy metal ions, but also realizes energy recovery through sludge anaerobic digestion and biogas power generation, having remarkable environmental benefits and economic value.

The utility model discloses a kind of stove made of waste oil drum, it is related to coal-burning stove technical field, comprising: furnace body, base and moving mechanism, furnace body is made by utilizing waste oil drum, the top of furnace body is provided with feed inlet, the bottom of furnace body lateral wall is provided with ash outlet;Base is fixedly connected at the bottom of furnace body;Moving mechanism is set at the bottom of base, moving mechanism includes driving element and multiple pulleys, driving element is installed in base, the output end of driving element is connected with each pulley, driving element can drive each pulley to protrude base downwards and keep the position after protruding to make pulley and ground rolling connection, and also can drive each pulley to be recycled to base upwards to make base and ground contact, simple structure, convenient to use, effectively improve moving performance, effectively reduce human cost and operation difficulty in use process.

The application discloses a preparation method of a comprehensive sample for accounting for element carbon content of coal, obtains particle sizes of each sample for measuring element carbon content of coal, parameter information of corresponding coal into a furnace of each sample and weight of each sample in an air dry state, calculates calibrated air dry base moisture of each sample according to the parameter information of the corresponding coal into the furnace of each sample and the weight of each sample in the air dry state, further calculates air dry base conversion sample amount of raw coal of the corresponding coal into the furnace of each sample, calculates mass fraction of each sample when the comprehensive sample is combined according to the air dry base conversion sample amount of the raw coal of the corresponding coal into the furnace of each sample, combines each sample according to the mass fraction of each sample when the comprehensive sample is combined, and obtains the comprehensive sample. The application determines a method for combining a proportion of the comprehensive sample for accounting for element carbon content of coal, has high practical applicability, a simple calculation process, accurate results and high practical application value, and provides a basis for accurately accounting for element carbon content of coal.