15results about How to "Reduce coal consumption" patented technology

The application discloses a zero-carbon waste heat recovery system and method for a direct air-cooling unit, which comprises an air cooling island, a chemical water supplement pipeline, an air source heat pump, a photovoltaic power generation system, an energy storage system and a control unit. Dry hot air with a temperature of 20-50 DEG C discharged by the air cooling island is used as a low-temperature heat source, and the air source heat pump uses the waste heat to heat the chemical water supplement to 35-45 DEG C and then sends the chemical water supplement into a condenser or a hot well. The photovoltaic power generation system is installed on the windbreak wall around the air cooling island and is matched with the energy storage system to provide zero-carbon power for the air source heat pump. The control unit is in communication connection with a power plant DCS system. The application realizes zero-carbon emission of the water supplement heating link, effectively recovers the waste heat of the air cooling island, reduces coal consumption and power consumption of the unit, improves operation efficiency, has low modification difficulty and high safety, and is suitable for energy-saving modification of the direct air-cooling unit in the northwest region.

The invention provides a thermal power poly-generation system integrating waste heat recovery and pump heat energy storage. The thermal power poly-generation system comprises a combined heat and power generation system, and a flue gas waste heat utilization system exchanges heat with flue gas of the combined heat and power generation system and recovers flue gas waste heat; the pump heat energy storage system comprises a heat pump and a heat storage system, the heat storage system is connected with the combined heat and power generation system and the flue gas waste heat utilization system through pipelines for heat exchange through the heat pump, and the heat storage system is further electrically connected with the combined heat and power generation system for heat storage. The flue gas desulfurization waste heat recovery system is arranged on the tail flue of the boiler, so that the flue gas waste heat can be effectively recovered, and the coal consumption of a unit is reduced; cold energy supply can be achieved through the pump heat energy storage system, meanwhile, surplus electric energy and waste heat are converted into high-temperature heat energy to be stored in a high-temperature storage tank, the high-temperature heat energy is released when needed to generate steam, the steam is reinjected into a steam turbine thermodynamic system, the thermoelectricity operation interval is widened, the unit variable load rate is increased, and the power generation efficiency is improved. The operation regulation capability of the combined heat and power generation system is enhanced, and more flexible regulation and control means are provided.

The utility model discloses a kind of power station boiler dry slag machine furnace bottom air leakage management devices, specifically related to the field of energy saving and emission reduction of power station boiler, including dry slag machine body, its furnace bottom air leakage is led out through cooling air exhaust interface, furnace bottom air leakage exhaust interface, tail air leakage exhaust interface;Connection pipe;Air blower one, air blower two;Booster fan;Secondary air box outlet;Slag bin, slag discharge room;Transition slag hopper.The power station boiler dry slag machine furnace bottom air leakage management device described in the utility model, by the redesign of the way that traditional dry slag machine cooling air enters hearth, solve the dry slag machine cooling air that is completed heat exchange with furnace bottom slag, as furnace bottom air leakage directly enter hearth to the disturbance of combustion, change dry slag machine cooling air from disordered furnace bottom air leakage to orderly air by secondary air, can effectively improve the stability of hearth combustion, reduce flue gas temperature, reduce fly ash combustible carbon content, thereby improve boiler efficiency, reduce coal consumption.

The application discloses a process method for preparing SO2 coupling cement clinker production by decomposing phosphogypsum, which comprises the following steps: feeding the mixture of phosphogypsum and coal into a reduction furnace through a feeding device, and partially reducing the phosphogypsum into CaS; feeding the material at the outlet of the reduction furnace into a roasting furnace, and reacting the CaS and CaSO4 at high temperature to generate CaO and SO2; directly feeding the high-temperature CaO from the roasting furnace into a rotary kiln, and simultaneously adding clay, iron powder and coal into the rotary kiln; heating the rotary kiln to high temperature by using the waste heat of the CaO and the heat released by the combustion of the coal; firstly passing the high-temperature flue gas generated by the rotary kiln through a burn-out chamber, and then passing the high-temperature flue gas into a flue gas waste heat recovery boiler to perform heat exchange; and discharging the flue gas after dust removal by a high-temperature dust remover. After the reaction is completed, the high-temperature clinker is fed into a slag discharge waste heat recovery boiler to recover the waste heat. By using the application, the energy consumption, production cost and carbon emission amount of the cement clinker production can be greatly reduced, and the efficient and clean comprehensive utilization of the phosphogypsum can be realized.

The utility model relates to an efficient coal-fired generator set. The coal power unit comprises a boiler, a high-pressure cylinder, a back pressure machine and a feed water heating assembly. The steam output end of the boiler is connected with the steam input end of the back pressure machine; the steam output end of the back pressure machine is connected with the steam input end of the high-pressure cylinder; the first steam circulation area of the back pressure machine is smaller than the second steam circulation area of the high-pressure cylinder; the steam output end of the back pressure machine and the steam output end of the high-pressure cylinder are respectively connected with the feed water heating assembly so as to output steam to the feed water heating assembly; the feed water heating assembly is connected with the feed water end of the boiler so as to output feed water heated by steam to the boiler. The coal consumption of the coal power unit can be reduced.

The present application relates to the technical field of steam boiler, disclose a kind of photo-thermal and coal-fired unit coupling system and its control method, comprising: solar module and high-temperature heat pump module and molten salt heat storage module and coal power coupling module connected in sequence;Solar module includes solar light condensing and heat collecting unit and solar steam generating unit, output steam is transported to high-temperature heat pump module by energy transport module;High-temperature heat pump module includes steam-air heat exchanger and molten salt-air heat exchanger, steam enters high-temperature heat pump module by steam-air heat exchanger, and then is transported to molten salt heat storage module by molten salt steam heat exchanger;Molten salt heat storage module is connected with coal power coupling module by its internal molten salt heat storage steam generating unit, and the superheated steam generated by it is connected with coal-fired boiler main steam pipeline.Solve the problem of low thermal efficiency, poor peak shaving flexibility and large energy transmission loss in the prior art, achieve the purpose of efficient energy conversion, reduce coal consumption and small energy transmission loss.

This invention belongs to the field of energy consumption technology of rotary kilns for lime, and particularly relates to a method for reducing the heat loss of the rotary kiln shell, including the following: (1) optimizing the refractory material of the rotary kiln shell; (2) stabilizing process parameters: CO concentration at the kiln tail, set output of the rotary kiln, and unit heat consumption; (3) adjusting the operating basis and standards: ① Rotary kiln shell infrared temperature measurement standard: 200~240℃; Rotary kiln shell material filling rate standard: 8~10%; Burner flame temperature 1400~1500℃; ② If the rotary kiln shell infrared temperature exceeds the standard by ±10℃, increase the rotary kiln shell material filling rate and burner axial flow air volume; If the rotary kiln burner flame temperature exceeds the standard by ±25℃, increase the burner axial flow air volume; (4) Verify whether the adjustment range and direction are correct based on the real-time detection curves of the rotary kiln shell temperature and the rotary kiln burner flame temperature. This method reduces the temperature of the calcination zone of the rotary kiln shell and reduces the heat loss of the rotary kiln shell by increasing the coating and adjusting the operating basis and standards.

The invention relates to the technical field of control, in particular to a coal power unit thermoelectric decoupling real-time optimization scheduling method and system based on model prediction control and a computer readable storage medium. The system comprises a data acquisition and processing layer used for acquiring key equipment data in real time through a data acquisition module and transmitting the key equipment data to a data preprocessing module for processing through a distributed control system, and a model prediction control core layer used for predicting the key equipment data through a constructed multivariable prediction model. Predicting equipment data of the cogeneration unit by taking the net power generation power, the heat supply load and the main steam pressure of the unit as controlled variables, generating an operation instruction based on a predicted equipment value, and performing prediction optimization on the unit instruction in a set period to obtain an optimal operation instruction; and the instruction execution and monitoring layer is used for sending the unit instruction to a corresponding control loop and monitoring key safety parameters of the unit in real time.

A fluidized bed gasification system for high-moisture lignite is disclosed. The outlet of the drying and pulverizing unit is connected to the inlet of the fluidized bed gasification unit. The outlet of the fluidized bed gasification unit is connected to the inlet of the sensible heat recovery unit. The outlet of the sensible heat recovery unit is connected to the inlet of the gas-solid separation unit. Part of the superheated steam discharged from the steam outlet of the sensible heat recovery unit goes downstream, and part of it enters the fluidized bed gasification unit together with oxygen. The outlet of the gas-solid separation unit is connected to the synthesis system. One outlet of the synthesis system discharges synthesis gas, and the other outlet discharges methane. The methane and air enter the hot air device for combustion to produce high-temperature flue gas, which enters the drying and pulverizing unit. The drying heat source of this invention comes from the combustion of methane produced by the system itself, and the steam required for gasification comes from the sensible heat recovery of the system's own synthesis gas. The material and energy coupling between each unit is close. This design reduces the dependence on external utilities and makes the device structure more compact.

The utility model relates to a coal power unit. Coal power unit, include: boiler, heat circulation system, back pressure machine and feedwater heater, the steam output end of boiler is connected with the steam input end of back pressure machine and the steam input end of heat circulation system respectively, the steam output end of back pressure machine is connected with the steam input end of feedwater heater, to steam output to feedwater heater, the feedwater output end of heat circulation system is connected with the feedwater input end of feedwater heater, to feedwater output to feedwater heater, the feedwater output end of feedwater heater is connected with the feedwater end of boiler, to steam heated after the feedwater output to boiler. Adopt the utility model can reduce coal power unit coal consumption.

A fluidized coal-based pre-reduction subsystem and a method for preparing molten iron from laterite nickel ore are disclosed, belonging to the field of laterite nickel ore reduction roasting technology. The system includes a preheating oxidation system, a fluidized coal-based pre-reduction system, a high-temperature molten iron subsystem, and a hot air circulation system; wherein the preheating oxidation system, the fluidized coal-based pre-reduction system, and the high-temperature molten iron subsystem are connected sequentially, and the hot air circulation system connects all systems into a closed loop. The method for preparing nickel-containing molten iron using the above system includes the following steps: 1. Feeding and preheating oxidation operation; 2. Fluidized coal-based pre-reduction operation; 3. High-temperature molten iron subsystem operation. The method for preparing nickel-containing molten iron using the fluidized coal-based pre-reduction-molten iron subsystem has advantages such as no need for coke, low reducing agent consumption, large processing capacity, low power consumption, environmental friendliness, compact process, and high degree of automation.

The utility model relates to the technical field of fluidized bed boilers, and discloses a circulating fluidized bed boiler with a high-temperature separation function, which comprises a hearth, a boiler barrel device, an air distribution device, a separator, a return feeder and a tail flue, the separator adopts a high-temperature cyclone separator design, an inlet of the separator is in an inclined and tapered form, a central barrel is arranged at the top of the separator, and the tail flue is arranged in the central barrel. An inlet is formed in the left side of the separator. According to the utility model, by optimizing the design of the high-temperature cyclone separator, the separation efficiency is improved to more than 99.5%, the fine ash share is increased, the flow rate of a flue gas inlet is effectively improved, the speed of external swirling air flow is increased, and the air flow field is optimized, so that the separation efficiency is obviously improved; according to the bell jar type coal-leakage-free air cap, through multi-dimensional innovation and optimization of the structure, the material, the air distribution performance, the maintainability and the like, the operation efficiency and stability of the boiler are remarkably improved, meanwhile, the maintenance requirement is reduced, and a guarantee is provided for safe and efficient operation of the circulating fluidized bed boiler.

This invention provides a method for cogeneration load allocation in cogeneration power plants based on an improved gray wolf algorithm, belonging to the field of cogeneration system optimization and control technology. The method includes: S1: setting parameters; S2: initializing the population based on chaotic mapping; S3: calculating fitness values ​​and selecting superior individuals; S4: stratifying the population based on the fitness calculated in step S3, dividing the population into different levels, and adopting different position update methods according to the characteristics of different levels; S5: iteration and outputting results. This method exhibits strong real-time performance in cogeneration load allocation, possesses a robust multi-objective trade-off mechanism, can balance local and global search capabilities, and effectively solves optimization problems in complex scenarios of cogeneration power plants.

The invention relates to the technical field of thermal power generation, in particular to a thermal power generating unit quality and efficiency improving system and method.The thermal power generating unit quality and efficiency improving system integrates a heat supply network initial station, an electric boiler subsystem, a hot water heat storage subsystem and a circulating water cooling subsystem, and the heat storage subsystem has two connection states through valve control; the electric boiler is cooperated to realize deep peak regulation and peak operation; and a cooling system is connected in a non-heat-supply season, the heat storage tank is reused as a low-temperature circulating water energy storage device, the back pressure and coal consumption of the unit are reduced, unification of full-period peak regulation flexibility and operation economy is achieved, and the equipment utilization rate and the system energy efficiency are remarkably improved.

The application discloses a power plant peak shaving and climbing operation guidance system and an operation optimization method based on digital twinning, which comprises a high-fidelity full-digital twinning model module, a hybrid modeling method combining a mechanism model and a data-driven model is used to construct a digital twinning body covering the whole process of a power plant from coal entering the plant to power generation and grid connection, and the digital twinning body comprises sub-models of a boiler, a steam turbine, a generator and main auxiliary systems; a global rolling optimization engine module is used to receive a power plant operation target instruction, adopt a rolling time domain optimization strategy, and solve an optimal set value sequence of a full-plant adjustable actuator in a future preset prediction time domain; optimal set value sequences obtained by the global rolling optimization engine module are set as guidance values based on the optimal set value sequences, and are issued to a DCS for execution by the DCS or reference by operation personnel; and a data communication module is used to realize data interaction between different modules.