140results about How to "Improve waste heat recovery rate" patented technology

The invention discloses a vertical cooling and waste heat recovery furnace for sinters, which comprises a feeding hopper and a discharge hopper, wherein the feeding hopper and the discharge hopper are respectively communicated with the top and the bottom of a cooling chamber; first and second air ducts are sequentially sleeved in the cooling chamber; the walls of the first and second air ducts are respectively provided with a plurality of air outlet holes; the top of the first air duct is provided with a cone distributor; the bottom of the second air duct is communicated with a cold air inlet pipe; the cooling chamber is provided with an inner sleeve; a plurality of vent holes are distributed in the wall of the inner sleeve; a hot air collecting cavity is formed between the inner sleeve and a housing of the cooling chamber; the upper part of the hot air collecting cavity is communicated with a hot waste gas exhaust pipe; and the bottom of the hot air collecting cavity is communicated with the discharge hopper. The invention provides a cooling system integrating sinter cooling with closed hot flue gas recovery and waste heat utilization; the vertical cooling and waste heat recovery furnace for the sinters operates under a negative pressure in the cooling process; emission of pollutants can be greatly reduced; the field environment is improved; and the heat recovery rate is improved.

The invention discloses a gas waste heat recovery device for a coal-fired boiler. The recovery device comprises a gas box, a cooling box and a plurality of heat exchange pipes, wherein the cooling box is arranged on the gas box; the heat exchange pipes pass through a separation layer of the gas box and the cooling box; a sonic dust cleaner is arranged in the gas box; a plurality of gas flues which are separated by the separation layer are arranged in sections of the gas box, in which the heat exchange pipes are arranged; and an inlet of each gas flue is provided with a gas flue valve. Compared with the prior art, the gas waste heat recovery device for the coal-fired boiler has the advantage of solving the problem that accumulated dust of the gas box is difficult to clean and remove.

The invention discloses an air compressor waste heat recycling control system based on a C8051 microprocessor. The air compressor waste heat recycling control system comprises a circulating water tank, a heat exchanger, a three-way proportional valve and temperature sensors. The circulating water tank is provided with a water outlet, a water inlet, a hot water output opening and water adding opening. The heat exchanger is provided with an oil return pipe and an oil outlet pipe which are connected to an air compressor and used for recycling the heat generated by the air compressor. The heat exchanger is further provided with a water outlet pipe and a water inlet pipe which are connected to the water inlet and the water outlet of the circulating water tank and used for heating the water in the circulating water tank. The three-way proportional valve is provided with two outlets and one inlet, wherein the inlet is connected to the water outlet of the circulating water tank through a circulating pump, one outlet is connected with the water inlet pipe inlet of the heat exchanger, and the other outlet is connected to the circulating water tank. The temperature sensors are respectively disposed in the oil outlet pipe, the oil return pipe, the water outlet pipe, the water inlet pipe and the circulating water tank. The air compressor waste heat recycling control system has the advantages that the C8051 microprocessor is used as a core processor for waste heat recycling control, integral control is achieved, a control module is integrated with a liquid crystal display module and a keyboard module, and the system is compact in structure, low in cost and good in reliability.

The invention relates to a method and a system suitable for recovering waste heat of blast furnace slag flushing water. The method comprises the following steps of: S1, filtering the high-temperature blast furnace slag flushing water and then storing in a hot water tank; S2, performing pressure delivery on the hot water; S3, delivering the hot water to an absorption refrigerating unit or a heating device or a cooling tower; and S4, delivering the water flowing out of the absorption refrigerating unit or the heating device or the cooling tower to a blast furnace slag treatment system to flush slag. The system comprises the blast furnace slag treatment system, the hot water tank and a circulating pump which are connected sequentially, and the cooling tower, the absorption refrigerating unit and the heating device which are connected in parallel. By adopting the method and the system, the low-temperature waste heat in the blast furnace slag flushing water can be fully utilized, so that the aims of energy conservation and environmental friendliness are fulfilled, the seasonal problem of the slag flushing water waste heat recovery is solved, and the recovery rate of the waste heat of the high-temperature slag flushing water is improved.

The present invention relates to a steel-making high temperature gas cooling waste heat recycling steam producing energy saving system device for a converter and an electric oven. The present invention is characterized in that the device comprises a plurality of steam generators (1) which are connected in series and whose the gas circulating section is decreased in cascade type, an inlet interface (5) is arranged at one end of the steam generator (1), an outlet interface (7) is arranged at the other end, a heat transfer element (6) is arranged inside the steam generator (1), and the steam generator (1) is connected with a steam drum through each steam-water connecting pipe (4). The steam generator system waste heat steam producing energy saving device which is arranged in a high temperature chimney neck makes the gas temperature in the chimney neck decrease from 1000 degrees centigrade to 180 degrees centigrade to discharge, meeting the purposes of waste heat reuse and energy conservation. The present invention has the advantages that heat transfer efficiency is improved, each part of the process is independently arranged dispersedly, the equipment cubage is small, the disassembly is convenient, and the routine maintenance and the servicing and repair are convenient.

The invention discloses a camphorwood vaporization water vapor drying and essential oil and waste heat recycling device and a using method. The camphorwood vaporization water vapor drying and essential oil and waste heat recycling device comprises a high-temperature drying chamber, an essential oil and waste heat recycling assembly and a heat source assembly. A drying chamber door is arranged at the front end of the high-temperature drying chamber. Cooling fin assemblies and steam-injection assemblies are arranged in the high-temperature drying chamber. Bottom rails and condensed water recycling channels are formed in the bottom of the high-temperature drying chamber. A fan assembly is arranged on the upper portion of one side of the high-temperature drying chamber, and a micro-pressure self-discharging assembly extending to the outside is arranged on the upper portion of the other side of the high-temperature drying chamber. The essential oil and waste heat recycling assembly is connected with the condensed water recycling channels and the micro-pressure self-discharging assembly. The heat source assembly is connected with the essential oil and waste heat recycling assembly and the cooling fin assemblies. The using method comprises the following steps that S1, camphorwood is put in the drying chamber; S2, high-humidity preheating is conducted; S3, drying is conducted, and essential oil and waste heat are recycled; S4, cooling treatment is conducted; S5, high-humidity balance treatment is conducted; and S6, the camphorwood is taken out of the drying chamber. The camphorwood vaporization water vapor drying and essential oil and waste heat recycling device and the using method have the advantages that the drying period is short, emission of waste gas is avoided, and the camphorwood essential oil and the drying waste heat can be recycled.

The invention discloses a boiler discharge flue waste heat recovery device and a boiler discharge flue waste heat recovery method. The device comprises a first mounting frame and a second mounting frame, wherein the first mounting frame and the second mounting frame are arranged side by side, a boiler is fixedly connected to the interior of the first mounting frame, the upper surface of the secondmounting frame is fixedly connected with a first fan, a material inlet pipe is fixedly connected to the bottom of the side surface of the boiler, a rotating door is hinged to the bottom end of the front surface of the boiler through a hinge, the gas inlet of a first fan is fixedly connected with the boiler, and the gas outlet of the first fan is fixedly connected with a waste heat recovery pipe.The invention relates to the technical field of boiler equipment. According to the invention, heat in flue gas is recovered through the waste heat recovery pipe, the flow speed of the flue gas in thepipeline can be reduced through the speed reduction box, and the flue gas can rotate in the pipeline through the spiral groove, so that the contact area and the contact time of the flue gas and the pipeline can be increased.

The invention relates to a device for preparing hydrogen-rich gas by gasifying a biomass under the catalysis of high-temperature metallurgical slag particles and a method. The device comprises a downer reactor, a high-temperature slag particle storage chamber, a spiral biomass raw material feeder, a separator, a steam generator and a hydrogen-rich gas collector, wherein the high-temperature slag particle storage chamber and the spiral biomass raw material feeder are located above the downer reactor and are communicated with the top of the downer reactor; the separator is located below the downer reactor and is communicated with the bottom of the downer reactor; and the steam generator and the hydrogen-rich gas collector are located at two sides of the downer reactor and are respectively communicated with the downer reactor. The method in which the device is applied comprises the steps of respectively adding high-temperature metallurgical slag particles, biomass raw materials and steam into the downer reactor through a rotary molten slag granulating device, the spiral biomass raw material feeder and the steam generator; carrying out gasification reaction on the biomass raw materials under the catalysis of the high-temperature metallurgical slag particles to generate hydrogen-rich gas; and storing the hydrogen-rich gas into the hydrogen-rich gas collector. By using the method, waste heat of metallurgical slag is recycled in a chemical energy way, so that the recovery rate of the waste heat is relatively high, and the problems of low waste heat recovery rate and low recovery quality of a dry-method metallurgical slag treatment process are solved.

The invention relates to a method for reclaiming sintering ore cooling waste gas low-temperature waste heat, in particular to a sintering ore cooling waste gas full combustion-supporting generating set, which comprises a fuel supply system forming a conventional fuel boiler generating system, a generating boiler, a steam turbine, a generator, a condenser, a circulating water pump, a cooling tower, a water supplementing pump, a condensed water pump, a low-pressure heater, a deaerator, a water supply pump, a draft fan and a chimney, and also comprises a sintering ore cooling waste gas collector and a waste gas pressurizer, wherein the waste gas collector is placed above a sintering machine of which a water gas output pipe is connected with a combustion chamber of the generating boiler, and the water gas output pipe is provided with the waste gas pressurizer. The device has the advantages that: the reclaiming rate of the waste heat of the sintering ore cooling waste gas is greatly improved, the waste heat grade of the sintering ore cooling waste gas is greatly improved, the basic Rankine cycle efficiency of the generating system is greatly improved, the vast disposable investment and precious land resources are saved, the running expense of the generating system is greatly reduced, and the management fee of the generating system is greatly reduced.

The invention relates to a method of recovering flue gas waste heat and dust in nonferrous metal smelting and belongs to a method of waste heat utilization and waste gas treatment. A waste heat recovery device and a dust recovery device are formed by connecting a counter flow heat exchange waste heat boiler A, a silicon nitride porous ceramic filter, a counter flow heat exchange waste heat boiler B, a counter flow heat exchange waste heat boiler medium preheater, a plate type passage gas counter flow heat exchanger, a bag filter, and a draught fan through a pipeline or pipes; flue gas subjected to waste heat and dust recovery is subjected to sulfur recovery in a desulfurization shop, and the tail gas can be discharged standardly. The method includes the steps of primary waste heat recovery, filtration, dedusting and purification of high temperature flue gas, secondary waste heat recovery, tertiary waste heat recovery, quaternary waste heat recovery, low temperature filtration and dedusting, sulfur recovery, and emission of tail gas under national standard. The method has the advantages that waste heat recovery is efficient, dust recovery is complete, process control is simple, and recovery cost is low.

The invention provides a device for recovering waste heat in the heat treatment tempering process of a steel strip. The device comprises an unwinding wheel, a winding wheel and the steel strip for connecting the unwinding wheel and the winding wheel, wherein a heating furnace, a quenching device and a tempering furnace which are used for performing heat treatment on the steel strip are arranged between the unwinding wheel and the winding wheel in turn; a waste heat absorption heat exchanger for vaporizing inlet water to form vapor is arranged on the steel strip between the tempering furnace and the winding wheel; a waste heat release heat exchanger for liquefying the vapor to form outlet water is arranged on the steel strip between the unwinding wheel and the heating furnace; and the waste heat absorption heat exchanger conveys the vapor to the waste heat release heat exchanger through a vapor conveying pipe. The device is high in waste heat recovery rate and has a simple structure.

The invention relates to a thermal confluence bus-piping waste heat recovery and utilization system, whose thermal source is air medium. It is characterized in that at least two thermal air sources are connected with the channel of thermal air source respectively; each channel of thermal air source is connected one way of three-way wind door; another channel of three-way wind door is connected with the bus pipe of thermal confluence by connecting pipes; the bus pipe of thermal confluence is connected with the waste heat recovery device; the third way of three-way wind door is connected with by-pass channel; the protection device of generating device of thermal air source can be assigned on the channel of thermal air channel directly; the control equipment of thermal confluence is connected with the generating device of thermal air source, the three-way wind door and controlling and measuring component on the waste heat recovery and utilization device by control circuit. The merit of invention is that multiple thermal air sources are combined to enter into a waste heat recovery and utilization device so that waste recovery is realized easily and it is provided with high recovery efficiency, compact structure, small occupied area, easy assignment, easy running and maintenance and few spare parts.

The invention provides a phase change-dividing-wall-type combined heat exchange system and method for flue gas of a heating furnace. A shaft control reversing flue gate, a phase change air heat exchanger and a metal dividing-wall-type coal gas heat exchanger are connected in series in the flue channel of the heating furnace; the phase change air heat exchanger is divided into two heat exchange chambers through a baffle wall, and each heat exchange chamber is filled with a phase change heat storage material; high-temperature flue gas entering one heat exchange chamber releases heat to the phase change heat storage material, and after the phase change heat storage material is changed from the solid state to the liquid state, the flue gas enters the other heat exchange chamber through regulating the shaft control reversing flue gate for heat conversion; meanwhile, cold air enters the hot heat exchange chamber, and the phase change heat storage material is changed from the liquid state to the solid state and emits heat when being cooled; the temperature of the cold air rises to 600 DEG C above after the cold air absorbs heat and then the cold air is used for preheating combustion-supporting air of the heating furnace. According to the invention, the problem that the high-temperature side of an existing metal-air heat exchanger is easily burned is radically solved; the air preheating temperature can be improved greatly; the flue gas residual heat recovery efficiency can be improved; the preheating temperatures of air and coal gas can be stabilized; the service life of a heat exchanger system can be prolonged.

The invention relates to a copper plant low-grade waste heat recovery system for urban central heating. The copper plant low-grade waste heat recovery system is characterized by comprising a primary network circulating pump and a copper plant waste heat recovery device, wherein primary network return water from a primary pipe network flows into the copper plant waste heat recovery device through the primary network circulating pump, the copper plant waste heat recovery device collects waste heat in a copper plant, the waste heat is used for heating the primary network return water, and after the temperature rises, the primary network return water is supplied to a user in the form of primary network water supply; the copper plant waste heat recovery device comprises an austenitic furnace wall waste heat recovery device, a converter body waste heat recovery device, a drying tower waste heat recovery device, an absorption tower waste heat recovery device, a slag pool waste heat recovery device and a copper plant steam waste heat recovery device, wherein the austenitic furnace wall waste heat recovery device, the converter body waste heat recovery device and the drying tower waste heat recovery device are arranged in parallel, and the absorption tower waste heat recovery device, the slag pool waste heat recovery device and the copper plant steam waste heat recovery device are connected in series with the three waste heat recovery devices which are connected in parallel. The copper plant low-grade waste heat recovery system can be widely applied to recovery of low-grade waste heat in the copper plant.