81results about How to "Increase waste heat recovery" patented technology

A waste heat recovery apparatus and process for use with an internal combustion engine includes a thermo electric apparatus that connects to components of the internal combustion engine to transfer heat between components, generate electric energy from heat extracted from components needing cooling, and convert electric energy to heat energy to transfer to components needing heating.

The invention discloses a direct-combustion heat-accumulating-type incineration treatment device, which comprises a direct-current incinerator. The interior and the wall of the hearth of the direct-current incinerator are respectively provided with a divider wall made of a heat accumulating material to divide the hearth into a combustion zone, a main combustion chamber, an after-combustion zone and a waste gas channel, wherein a porous wall made of the heat accumulating material is arranged between the main combustion chamber and the after-combustion zone. When waste gas enters the combustion zone from the waste gas channel to be ignited, the waste gas with high flow rate enters the combustion chamber, and rebounds after meeting the porous wall, and a gas flow turns back to be mixed together with a new gas flow to form a mixed flow state; and smoke enters the after-combustion zone after being rectified through the porous wall. Moreover, the invention also discloses a treatment method for the direct-combustion heat-accumulating-type incineration treatment device.

The invention provides a heat accumulating type flue gas waste heat recovery device. The device consists of a heat accumulator and a heat exchanger, wherein the heat accumulator comprises a heat accumulator barrel and at least one heat accumulating body arranged in the middle or on the inner wall of the heat accumulator barrel, the front end of the heat accumulator barrel is provided with a flue gas inlet, and a rear end outlet of the heat accumulator is connected with the heat exchanger directly or by a flue; and a flue gas outlet is formed at the tail end of the heat exchanger. The heat accumulating body is made of a solid heat accumulation material or a phase-change heat accumulation material (PCM material). The heat accumulating type flue gas waste heat recovery device has the advantages of suppressing temperature fluctuation of flue gas removing, effectively increasing recovery rate of waste heat and improving waste heat output quality, reducing production energy consumption of enterprises to the maximum degree, and fully meeting flue gas waste heat recovery requirements of various industrial furnaces and industrial boilers.

The invention relates to a flue gas waste heat recovery unit which comprises a flue gas unit, a generator unit, a condenser unit, an absorber unit, a water return pipe and a water supply pipe. The flue gas unit is sequentially connected with the generator unit, the condenser unit and the absorber unit to form a flue gas heat exchanging path; the outlet of the generator unit is connected with the inlet of a solution-to-solution heat exchanger, the outlet of the absorber unit is divided into two paths: one path is merged with the outlet of the solution-to-solution heat exchanger to be connected with the inlet of a solution-to-water heat exchanger through a solution spray pump, the outlet of the solution-to-water heat exchanger is connected with a solution spray mechanism in the absorber unit, the other path is connected with the inlet of a solution-to-solution heat exchanger through a solution circulating pump, and the outlet of the solution-to-solution heat exchanger is connected with a dilute solution spray mechanism through the generator unit so as to form a solution heat exchanging and circulating loop; the outlet of the condenser unit is connected with the inlet of a water-to-water heat exchanger through a condense water spray pump, the outlet of the water-to-water heat exchanger is connected with a condense water spray mechanism through the condenser unit to form a condense water heat exchanging and circulating loop; the water return pipe is connected with a water-to-water heat exchanger unit and the inlet of a solution-to-water heat exchanger, and the water supply pipe is connected with the water-to-water heat exchanger and the inlet of the solution-to-water heat exchanger.

The invention relates to a low-vacuum absorption-type composite heat pump residual heat supply system based on an ultra-great-temperature-difference heat supply network, and belongs to the field of residual-heat-recovery-type cogeneration based on low-vacuum circulation water heating as well as absorption-type heat exchange. The low-vacuum absorption-type composite heat pump residual heat supply system comprises an absorption-type heat pump residual heat recovery device, a peak adjusting heater, a heat supply network ultra-great-temperature-difference heat exchange machine set as well as pipeline components. The low-vacuum absorption-type composite heat pump residual heat supply system is characterized by also comprising a direct dead steam recovery device as a water-based heat loading source of the heat supply network; a cold side inlet of the device is connected with a water return pipe of the heat supply network, and an outlet of the device is connected with a water inlet of an absorption-type heat pump heat supply network; a water outlet of the absorption-type heat pump heat supply network is connected with a water of a heat supply network of the peak adjusting heater; a water outlet of the heat supply network of the peak adjusting heater is connected with a water supply pipe of the heat supply network; dead steam enters the direct dead steam recovery device and the absorption-type heat pump evaporator. The low-vacuum absorption-type composite heat pump residual heat supply system provided by the invention is relatively higher in efficiency for thermal power plants than that in the conventional recovery mode for extracting residual heat from cooling water, can improve the dead steam residual heat utilization quantity by more than 1-2 times, and is especially suitable for central heat supply systems of middle and large sized turbosets.

A device for recovery of waste heat generated during operation of an internal combustion engine includes a thermodynamic engine, which includes a working fluid circulation circuit and is configured for recovery of the waste heat a first arrangement for providing a first coolant from a first source for heat exchange with the working fluid in the working fluid circulation circuit, and at least one further arrangement for providing a further coolant from a further source for heat exchange with the working fluid in the working fluid circulation circuit, wherein the further source is at different heat level than the first source during operation of the internal combustion engine.

A fuel cell system for generating electrical power and high level heat comprising at least one high temperature fuel cell stack having an anode side and a cathode side and adapted to generate electrical power, and a gas oxidizer/high level heat recovery assembly comprising an oxidizer adapted to oxidize one or more of exhaust output from the at least one high temperature fuel cell stack and a gas derived from the exhaust, and to generate high level heat, and a high level heat recovery system adapted to recover the high level heat generated in the oxidizer.

The invention discloses a novel solar drying system. The novel solar drying system comprises a solar air heat gatherer, an air blower, a solar battery, a drying box, a temperature and humidity controller, a valve and a heat exchanger. The novel solar drying system is characterized in that the heat exchanger is provided with a first air inlet, a second air inlet, a first air outlet and a second air outlet; an insert pipe is arranged in each vacuum heat gathering pipe of the solar air heat gatherer, and the insert pipes are connected with an air buffer backflow zone header after passing through the top of a hot air flow passage zone header; the air blower is arranged between the air outlet of the heat gatherer and the air inlet of the drying box; an air flow passage zone is arranged in the side of the inside of the drying box near the air blower, and a material drying zone is arranged at the other side; an induction probe of the temperature and humidity controller is arranged at the air outlet of the drying box; an air return pipeline led from the air outlet of the drying box is divided into two branches, one branch is connected with the first air inlet of the heat exchanger through a second valve, the other branch is further divided into two passages after passing through the first valve, one passage is directly connected with the air inlet of the heat gatherer header, and the other passage is connected with the first air outlet of the heat exchanger through a third valve.

The invention relates to a low vacuum ejector heat pump composite waste-heat heating supply system based on a huge temperature-difference heat supply network, and belongs to the field of waste-heat recovery type combined heat and power generation based on low vacuum circulation water heating and heat exchange of an ejector heat pump. The system is characterized by comprising an ejector heat pump waste-heat recovery device, a dead-steam direct recovery device, a pitch peak heater, a heat supply network huge temperature-difference heat exchange unit and a pipe fitting, wherein the dead steam is taken as a water-based load heat source of the heat supply network; a cold-side inlet of the dead steam direct recovery device is connected with a water return pipe of the heat supply network; an outlet is connected with a heat supply network water inlet of an ejector heat pump condenser; then the dead steam is sent to the pitch peak heater to be heated to the required temperature, and then exhausted out; at last, the dead steam is sent into the dead-steam direct recovery device, and an ejection port in the ejection section of the ejector heat pump. The system can be used for a thermal power plant with higher efficiency than the conventional recovery way that waste-heat is extracted from cooling water, the utilization amount of the dead-steam waste heat can be improved by more than 1-2 times, while the investment is only a part of that of an absorption heat pump.

The invention provides a semi-open high-temperature heat pump system. The system comprises a compressor, a contact condenser, a heat exchanger, an evaporator, a water purifier, a cold water pump, a hot water pump, a circulating water pump and a vacuum pump. An exhaust port of the compressor is connected with the contact condenser, the contact condenser is connected with the evaporator through theheat exchanger, the evaporator is connected with the compressor air suction port through an upper exhaust port, an outlet of the water purifier is correspondingly connected with the compressor, the contact condenser and the evaporator through the cold water pump, a lower outlet of the evaporator is connected with the contact condenser through the circulating water pump, the upper part of the contact condenser is connected with the vacuum pump, and the lower part of the contact condenser is connected with the hot water pump. According to the system, water is adopted as a circulating working medium, and the contact condenser with high heat transfer efficiency is adopted, so that the system has the characteristics of being environment-friendly and high in efficiency, can recover low-temperature waste heat of 50 DEG C or above, and provides high-temperature hot water of 90 DEG C or above. Compared with the prior art, the system effectively reduces the heat transfer thermal resistance, improves the heat transfer efficiency, effectively recovers the low-temperature waste heat, improves the heat source quality, and achieves reuse.

The invention discloses a sinter distributed temperature cooling method. The method comprises the following steps: determining sinter layers with temperatures lower than the unloading temperature of a circular cooler as low temperature sinter layers and determining other sinter layers as high temperature sinter layers according to temperature distribution of sinter layers in a sintering machine trolley at the tail of a sintering machine; and carrying out time-sharing unloading during unloading at the tail of the sintering machine to achieve separation of the low temperature sinter layers and the high temperature sinter layers, wherein the low temperature sinter layers do not enter the circular cooler but are directly conveyed to a follow-up screening procedure after being crushed, and the high temperature sinter layers enter the circular cooler to undergo cooling operation after being crushed. The method has the beneficial effects that the handling capacity of the sinter in the circular cooler can be obviously reduced, the cost of the circular cooler can be reduced and the sinter waste heat recovery can be increased by improving the sinter unloading method and the method of sinter distribution on the circular cooler. The invention also discloses a sinter time-sharing unloading trolley and a distributed temperature unloading device.

The invention provides an intelligently-controlled open type compression absorption heat pump system for water and waste heat recovery. An outlet of a gas pipeline is connected with a contact heat exchanger, a circulating solution pump I is arranged on a pipeline between an absorber and a solution heat exchanger, and a circulating solution pump II is arranged on a pipeline between a regenerator and the solution heat exchanger; and a temperature and humidity and/or pressure sensor is arranged at a gas outlet at the upper portion of the contact heat exchanger and used for detecting the temperature and humidity and/or pressure of exhausted gas, and the circulating solution pump I, the circulating solution pump II and the temperature and humidity and/or pressure sensor are in data connection with a controller. The controller automatically adjusts the compression power of the circulating solution pump I and the circulating solution pump II according to the detected temperature and humidity and/or pressure, so that the flow of absorption solutions entering the absorber and the regenerator is adjusted to meet the requirements of water vapor absorption and solution regeneration in gas, and the moisture content parameter of the gas outlet is further changed. The power of the circulating solution pump I and the power of the circulating solution pump II are controlled through the temperature and pressure of outlet gas of the contact heat exchanger, the flow of the solutions entering the absorber and the regenerator can be guaranteed, and then the absorption and regeneration effects are adjusted; and finally, the temperature and pressure parameters of the gas in the contact heat exchanger and the absorber are kept in a relative balance state, and the system has extremely high engineering practical significance.

The invention discloses a compound type two-stage lithium bromide absorption type heat pump and a working method. The lithium bromide absorption type heat pump comprises two lithium bromide heat pumpunits which are mutually connected; the first lithium bromide heat pump unit comprises a first evaporator, a first generator, a first absorber and a first condenser which are mutually connected; the second lithium bromide heat pump unit comprises a second evaporator, a second generator, a second absorber and a second condenser which are mutually connected; and the output end of a heat exchange pipe of the first absorber sequentially communicates with heat exchange pipes of the second absorber, the second condenser and the first condenser. The invention further discloses the working method of the compound type two-stage lithium bromide absorption type heat pump. On the one hand, under the conditions that medium warm water and low warm water conditions are certain, the temperature of the unit generators is reduced, and the service life of the units is prolonged; on the other hand, the steam discharge range of the units is enlarged, the type selection of the units is reduced advantageously, and the cost is reduced; and the units are very convenient to manufacture.

The invention discloses a waste heat recovery method for improving the stability of an unstable waste heat resource in the sintering process. According to the waste heat recovery method, in the sintering process, temperature data of a plurality of wind chambers are acquired; a longitudinal temperature variation curve of sintering ores on a sintering ore deposit section is simulated according to the temperature data; the conveying speed of a conveyor belt and an air draft negative-pressure regulation valve of each wind chamber are regulated according to ingredient data and thickness of raw ores, so that the highest temperature point of the temperature variation curve is located at the last arranged wind chamber of the tail end of the sintering ore deposit section. By means of the method, the accuracy of the sintering final temperature reaches up to 90% or more, and the waste heat recovery rate can be increased by 5% or more; moreover, the quality of the sintering ores can be improved, and the return mire rate is reduced by 1% or more.

The invention discloses a movable tank type cooler. The cooler comprises 1) a ring-groove-shaped cooling bin, 2) a drive device driving the ring-groove-shaped cooling bin to move, 3) an annular hot air cover arranged on the ring-groove-shaped cooling bin, 4) at least one hot air collecting pipe connected to the top or the side portion of the hot air cover, 5) a cooling air flue arranged on the inner side of the ring-groove-shaped cooling bin, 6) an annular rotation rack arranged at the bottoms of the ring-groove-shaped cooling bin and the cooling air flue, 7) an ore discharging bucket arrangedat the lower portion of the ring-groove-shaped cooling bin, 8) a plurality of cooling draught fans and 9) a cooling air communication pipe. The cooling air flue comprises a cooling air flue moving base and a cooling air flue fixing cover. An air passing beam is arranged in the annular rotation rack in a hollow manner. Air outlets of the cooling draught fans communicate with the cooling air flue through cooling air pipes corresponding to the cooling draught fans. The cooling air communication pipe is arranged between the cooling air flue moving base and the annular rotation rack. According tothe movable tank type cooler, all air leakage links are eliminated, good sealing performance of movable tank cooling is guaranteed, and the waste heat recycling amount is greatly increased.