60results about How to "Efficient heat recovery" patented technology

A cooling circuit and an independent heat recovery circuit are associated with an internal combustion engine. A coolant is circulated a pump in a first and a second cooling sub-circuit. An increase in pressure in a work medium is achieved within the heat recovery circuit by a pump. This work medium is changed from liquid aggregate state to vaporous aggregate state and back to the liquid aggregate state in heat exchangers. This work medium is divided after the pump into two parallel partial flows and is changed into vaporous state in a first parallel branch in an EGR heat exchanger through which recycle exhaust gas flows and in a second parallel branch in an exhaust gas heat exchanger through flow exhaust gas downstream of the low-pressure turbine flows. This vaporous work medium is then fed to an expander and is then conducted through a cooled condenser and, liquefied again.

Methanol is synthesized from pre-heated methanol synthesis gas in one or more adiabatic synthesis stages with cooling of the resultant gas after each stage. Further methanol synthesis is then effected on the resultant partially reacted synthesis gas in a bed of synthesis catalyst cooled by means of a coolant flowing co-currently through tubes disposed in the catalyst bed. After cooling methanol is separated from the unreacted gas. Part of the unreacted gas is combined with make-up gas and used as the coolant fed to the aforesaid tubes, thus producing the pre-heated synthesis gas to be fed to the adiabatic synthesis stages.

The invention relates to an adsorber element for a heat exchanger and an adsorption heat pump or adsorption refrigerator that contains at least one such adsorber element. The adsorber element includes a heat-conducting solid body and a sorption material for a vaporous adsorbate arranged on the surface of this solid body. A fluid-tight foil composite is arranged on the outer surface of the open-pore solid body, at least in the areas in which a contact with a heat transfer fluid is provided, wherein this adsorber element is embodied such that the heat exchange between the open-pore solid body and the heat transfer fluid can take place via the fluid-tight foil composite.

A cooling circuit and an independent heat recovery circuit are associated with an internal combustion engine. A coolant is circulated a pump in a first and a second cooling sub-circuit. An increase in pressure in a work medium is achieved within the heat recovery circuit by a pump. This work medium is changed from liquid aggregate state to vaporous aggregate state and back to the liquid aggregate state in heat exchangers. This work medium is divided after the pump into two parallel partial flows and is changed into vaporous state in a first parallel branch in an EGR heat exchanger through which recycle exhaust gas flows and in a second parallel branch in an exhaust gas heat exchanger through flow exhaust gas downstream of the low-pressure turbine flows. This vaporous work medium is then fed to an expander and is then conducted through a cooled condenser and, liquefied again.

A plurality of flat tubes formed as a tube having notches by linearly cutting upper and lower parts from a hollow flat circular doughnut shape are stacked to structure a tube laminate. It is attached to a case so that a notch aligns with the notch and faces upward by an exhaust inflow end plate and that a notch aligns with the notch and faces downward by an exhaust outflow end plate. A cutoff valve is provided at an exhaust outflow end of an exhaust communication tube passing through the center of the tube laminate by heat insulation. While an internal combustion engine is warming up, the cutoff valve is closed to cause the exhaust to flow in gaps of the respective flat tubes from upward to downward as a whole and also a heat exchange medium is caused to flow in the respective flat tubes from downward to upward as a whole to have heat exchanged between the exhaust and the heat exchange medium to recover the exhaust heat.

The invention relates to an adsorber element for a heat exchanger and an adsorption heat pump or adsorption refrigerator that contains at least one such adsorber element. The adsorber element includes a heat-conducting solid body and a sorption material for a vaporous adsorbate arranged on the surface of this solid body. A fluid-tight foil composite is arranged on the outer surface of the open-pore solid body, at least in the areas in which a contact with a heat transfer fluid is provided, wherein this adsorber element is embodied such that the heat exchange between the open-pore solid body and the heat transfer fluid can take place via the fluid-tight foil composite.

To provide a boiler equipped with a water tube group performing heat recovery effectively and having expansion heating surfaces (fins or the like) of high durability, the present invention provides a boiler (1) including: a boiler body (10) having an inner water tube group (20) and an outer water tube group (30) that are arranged in an annular fashion; and a burner (40) arranged at a central portion of the inner water tube group (20), in which: intervals between adjacent inner water tubes constituting the inner water tube group (20) are closed except for portions where a gas flow passage is provided; and stud fins (22 and 32) are provided on a portion of at least one of the inner water tube group (20) and the outer water tube group (30) in a vicinity of the gas flow passage.

The invention belongs to the technical field of energy recovery, and particularly relates to a method and device for recovering molten blast furnace slag sensible heat. The process of the method sequentially includes the following steps that (1) blast furnace slag enters a segmented bottom blowing composite molten slag trough, compressed air is blown in from the bottom of the bottom blowing composite molten slag trough, and at the moment a heat accumulator is heated to be within the range from 1100 DEG C to 1250 DEG C; (2) molten slag of which the temperature is reduced to be within the range of 700 DEG C to 800 DEG C enters an old slag processing system through a connecting unit, and then follow-up processing is conducted on slag; (3) when slag stops being discharged from a blast furnace, air is still blown in from the bottom of the bottom blowing composite molten slag trough, and air is heated to be within the range from 800 DEG C to 900 DEG C when passing through the heat accumulator; (4) hot air is used for power generation after being dedusted, and then cooling water replaces heat for production. Compared with the prior art, the method and device have the advantages that through the improvement, heat can be efficiently recovered, the temperature of combustion air by a hot blast heater can be increased, the device and method can be also used for waste heat power generation, and then the purpose of energy reutilization is achieved.

The invention discloses a heat-transfer equipment performance experimental facility to solve the problem that a present experimental facility cannot perform experiments on heat transfer performance, corrosion resistance and mechanical property of an air preheater for gas-gas transfer. The heat-transfer equipment performance experimental facility is provided with parts such as a cylindrical shell (10), a combustor (12), a gas distributor (9), a transition section (26), a flue gas duct (27), a sulfur dioxide gas-bomb (17) and the like. The gas distributor divides an inner cavity of the cylindrical shell into a first cavity (13) and a second cavity (24). An inlet air tube (61), the second cavity, a flue gas duct and an outlet air tube (62) are respectively connected with a data acquisition unit for measuring gas temperature, pressure and flow. Each data acquisition unit is connected with a data processor (8) through respectively data line (4). The heat-transfer equipment performance experimental facility is mainly used for performing experiments on performance of a tubular heating furnace's air pre-heater for gas-gas transfer in the industries of petroleum refining and petrochemical engineering.

A plurality of flat tubes formed as a tube having notches by linearly cutting upper and lower parts from a hollow flat circular doughnut shape are stacked to structure a tube laminate. It is attached to a case so that a notch aligns with the notch and faces upward by an exhaust inflow end plate and that a notch aligns with the notch and faces downward by an exhaust outflow end plate. A cutoff valve is provided at an exhaust outflow end of an exhaust communication tube passing through the center of the tube laminate by heat insulation. While an internal combustion engine is warming up, the cutoff valve is closed to cause the exhaust to flow in gaps of the respective flat tubes from upward to downward as a whole and also a heat exchange medium is caused to flow in the respective flat tubes from downward to upward as a whole to have heat exchanged between the exhaust and the heat exchange medium to recover the exhaust heat.

An object of the present invention is to provide a boiler having a water tube group having an enlarged heat transfer surface (fins, etc.) that efficiently recovers heat and has high durability. The present invention is a boiler (1) comprising a tank body (10) having an inner water pipe group (20) and an outer water pipe group (30) arranged in a ring, and a combustion engine disposed in the center of the inner water pipe group (20). A device (40), characterized in that the adjacent inner water pipes constituting the inner water pipe group (20) are closed except for the part where the gas flow path is provided, and the inner water pipe group near the gas flow path (20) and at least one of the above-mentioned outer water tube group (30) is provided with column fins (22, 32).

A boiler has a plurality of inner heat-transfer tubes which makes up an inner heat-transfer tube row, and a plurality of outer heat-transfer tubes which makes up an outer heat-transfer tube row. Inner fins project from each of the inner heat-transfer tubes on an outer circumferential side of the inner heat-transfer tube row. Outer fins project from each of the outer heat-transfer tubes on an inner circumferential side of the outer heat-transfer tube row. An inner row communicating portion is provided in a lower end portion of the inner heat-transfer tube row. An outer row communicating portion is provided in an upper end portion of the outer heat-transfer tube row. An inner-fin absent region is provided in a lower end portion of each of the inner heat-transfer tubes. An outer-fin absent region is provided in a longitudinally middle portion of each of the outer heat-transfer tubes.

The invention relates to a double-plate and double-cold-source intelligent air refresher unit. The double-plate and double-cold-source intelligent air refresher unit comprises a plate type heat exchange unit, a heat pump circulating unit and a spraying unit; the plate type heat exchange unit includes a first plate heat exchanger and a second plate heat exchanger arranged side by side from left to right; the heat pump circulating unit includes a compressor, a cooling condenser, a reheat condenser, an expansion valve and an evaporator; and the spraying unit includes a spraying device, a water collecting tank and a circulating pump. The double-plate and double-cold-source intelligent air refresher unit further comprises a surface cooler; outdoor fresh air reaches an indoor passage, provided with a fresh air-air supply way, after passing through an air supply channel of the first plate heat exchanger, an air supply channel of the second plate heat exchanger, the surface cooler, the evaporator and the reheat condenser in sequence; and indoor returned air is exhausted out of an outdoor passage, provided with a returned air-exhaust air way, after passing through a returned air channel of the second plate heat exchanger, a returned air channel of the first plate heat exchanger and the cooling condenser in sequence. The double-plate and double-cold-source intelligent air refresher unit has the advantages of simple structure, complete functions, stable operation, low cost and high energy-efficiency ratio, and can realize year-round high-efficiency and low-energy-consumption operation.

The invention relates to a tail gas purification and heat recovery system and method for sludge treatment. The tail gas purification and heat recovery system comprises a first heat exchange flow pathand a second purification and heat exchange flow path and a third gas purification and recovery flow path, ; the first heat exchange flow path comprises a first heat exchanger and a second heat exchanger arranged downstream of the first heat exchanger, and a first heat exchange medium is circulated in the first heat exchange flow path so as to heat treatment gas used for sludge treatment in the first heat exchanger; and the second purification and heat exchange flow path comprises a heat exchange tank containing a second liquid heat exchange medium, the tail gas obtained after sludge treatmentis discharged into the heat exchange tank, is cleaned by a second liquid heat exchange medium in the heat exchange box and transmits heat to the second liquid heat exchange medium so as to be cooled,the second heat exchanger is in heat exchange relation with the second liquid heat exchange medium in the heat exchange box so as to transfer the heat of the second liquid heat exchange medium to thefirst heat exchange medium in the second heat exchanger. According to the third purification gas recovery flow path, through the third gas purification and recovery flow path, at least a part of thetail gas purified by the heat exchange box is guided back to the first heat exchanger through a gas inlet so as to circularly utilize the processing gas.