CN103900410A - Phase-change heat transfer device and heat transfer method thereof - Google Patents
Phase-change heat transfer device and heat transfer method thereof Download PDFInfo
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Abstract
The invention relates to a phase-change heat transfer device and a heat transfer method thereof, aiming to solve the problem that a phase-change heat transfer device and a heat transfer method thereof capable of avoiding occurrence of low-temperature corrosion and substantially recovering flue gas waste heat do not exist currently. The phase-change heat transfer device is characterized by comprising a heat releasing section barrel, a down-pipe buffer tank, a down pipe, a wall temperature thermometer, a low-temperature water inlet pipe, a safety valve, a heat releasing section exhaust pipe and a down-pipe connecting pipe. A heat releasing section blowdown pipe is mounted at the bottom of the heat releasing section barrel, a heat releasing array is mounted in a heat releasing cavity of the heat releasing section barrel, the low-temperature water inlet pipe and a high-temperature water outlet pipe are mounted on heat releasing section end socket, the down-pipe buffer tank is mounted at the bottom of the heat releasing section barrel, the wall temperature thermometer is mounted on the down pipe, and both the wall temperature thermometer and a low-temperature water regulating valve are connected to a terminal controller through leads. The phase-change heat transfer device is reasonable in structural design, safe and reliable, high in heat transfer effect, convenient to demount and maintain and capable of being arranged at any positions of a flue.
Description
Technical field
The present invention relates to a kind of heat-exchanger rig and heat-exchange method thereof, especially relate to a kind of phase change heat exchange device and heat-exchange method thereof, be mainly used in, in the field such as boiler of power plant, industrial furnace, can recycling waste heat and complementary energy.
Background technology
In the flue gas of boiler of power plant, industrial furnace discharge, contain sulfur trioxide (SO
3), the too low meeting of exhaust gas temperature causes the wall of heat exchanger heating surface that the corrosion of acid dew and stifled ash occur, so the flue-gas temperature of discharge should not be too low, even if still flue gas is with higher temperature discharge, heating surface is ubiquity corrosion and clogging phenomenon in various degree also.
Complex phase-change heat exchanger and horizontal type phase-change heat exchanger all can guarantee significantly to reduce exhaust gas temperature under lowermost wall surface temperature is higher than the prerequisite of flue gas acid dew point, but the liquid level of complex phase-change heat exchanger is in endothermic tube row, determine that its endothermic tube row can only vertically be placed in flue, be that complex phase-change heat exchanger can only be arranged on horizontal flue, range of application is restricted.If open day is on 07 25th, 2012, publication number is in the Chinese patent of CN102607010A, a kind of composite phase change heat exchange system is disclosed, this composite phase change heat exchange system is for boiler tail flue gas waste heat recovery, it comprises the single-phase heat exchanger and the vaccum phase conversion heat exchanger that connect successively, and boiler tail flue gas, successively by single-phase heat exchanger and vaccum phase conversion heat exchanger, is realized the recovery of fume afterheat, but this complex phase-change heat exchanger can only be arranged on horizontal flue.
Horizontal type phase-change heat exchanger liquid level is positioned at heat release section, cause part heat release pipe row to be dipped in water, make heat transfer effect undesirable, and when operation when steam water interface enters the water shock in heat release section and heat release section, can make heat release section produce strong vibrations, security performance has much room for improvement.If open day is on December 08th, 2010, in the Chinese patent that publication number is CN101907413A, a kind of horizontal type phase-change heat exchanger is disclosed, just there are the problems referred to above in this horizontal type phase-change heat exchanger.
In sum, also there is no at present a kind of reasonable in design, performance safety is reliable, and heat transfer effect is strong, can avoid occurring cold end corrosion, Mist heat recovering significantly again, and can be arranged in phase change heat exchange device and the heat-exchange method thereof of any position of flue.
Summary of the invention
The object of the invention is to overcome above shortcomings in prior art, and a kind of reasonable in design is provided, and performance safety is reliable, and heat-transfer effect is strong, be convenient to install, dismantle and safeguard, can be arranged in phase change heat exchange device and the heat-exchange method thereof of any position of flue.
The present invention addresses the above problem adopted technical scheme: the design feature of this phase change heat exchange device is: comprise heat release section cylindrical shell, heat release section blow-off pipe, down-comer surge tank, down-comer, wall temperature temperature measurer, down-comer header, endothermic tube row, terminal control unit, tedge header, tedge, high-temperature water outlet pipe, heat release section end socket, low temperature water inlet pipe, water injection pipe, heat release pipe row, safety valve, heat release section blast pipe, liquid level gauge, water at low temperature adjustable valve, tedge is taken over and down-comer is taken over, it in described heat release section cylindrical shell, is a heat release chamber, one side of this heat release section cylindrical shell is opening, described heat release section blow-off pipe is arranged on the bottom of heat release section cylindrical shell, described safety valve and heat release section blast pipe are installed in the top of heat release section cylindrical shell, this heat release section blow-off pipe, safety valve and heat release section blast pipe are all communicated with the heat release chamber in heat release section cylindrical shell, described heat release pipe row is arranged in the heat release chamber of heat release section cylindrical shell, this heat release pipe row's import and outlet are all positioned at the aperture position of heat release section cylindrical shell, in described heat release section end socket, be provided with dividing plate, this heat release section end socket is divided into separate low temperature cavity and high temperature chamber by dividing plate, described heat release section end socket is fixed on the opening of heat release section cylindrical shell, described heat release pipe row's import and the low temperature cavity of heat release section end socket are communicated with, and this heat release pipe row's outlet and the high temperature chamber of heat release section end socket are communicated with, described low temperature water inlet pipe and high-temperature water outlet pipe are installed on heat release section end socket, this low temperature water inlet pipe and high-temperature water outlet pipe respectively with heat release section end socket in low temperature cavity and high temperature chamber be communicated with, described water at low temperature adjustable valve is arranged on low temperature water inlet pipe, one end of described water injection pipe is arranged on heat release section cylindrical shell, the heat release chamber of one end of this water injection pipe and heat release section cylindrical shell is communicated with, and the other end of described water injection pipe is arranged on low temperature water inlet pipe, described down-comer surge tank is arranged on the bottom of heat release section cylindrical shell, the heat release chamber of this down-comer surge tank and heat release section cylindrical shell is communicated with, described liquid level gauge is arranged in down-comer surge tank, one end that described down-comer is taken over is connected on down-comer surge tank, the other end that this down-comer is taken over is connected to one end of down-comer, the other end of described down-comer is connected in down-comer header, one end of described endothermic tube row is connected in down-comer header, this endothermic tube row's the other end is connected in tedge header, one end of described tedge is connected in tedge header, the other end of this tedge is connected to one end that tedge is taken over, the other end that described tedge is taken over is arranged on the bottom of heat release section cylindrical shell, the other end that this tedge is taken over and the heat release chamber of heat release section cylindrical shell are communicated with, described wall temperature temperature measurer is arranged on down-comer, and this wall temperature temperature measurer and water at low temperature adjustable valve are all connected on terminal control unit by wire.Make thus the reasonable in design of the phase change heat exchange device in the present invention, safe and reliable, heat-transfer effect is strong, and demolition and maintenance are convenient, can be arranged in any position of flue.
As preferably, the low temperature cavity in heat release section end socket of the present invention and high temperature chamber lay respectively at the first half and the latter half of heat release section end socket, and described low temperature water inlet pipe and high-temperature water outlet pipe are arranged on respectively top and the bottom of heat release section end socket.
As preferably, heat release section end socket of the present invention is arranged on the opening of heat release section cylindrical shell by flange.
As preferably, on heat release section blast pipe of the present invention, be provided with two air bleeding valves.
As preferably, on heat release section blow-off pipe of the present invention, be provided with two blowoff valves.
A kind of heat-exchange method of phase change heat exchange device, it is characterized in that: step is as follows: by water injection pipe to water filling in the heat release chamber of heat release section cylindrical shell, the water of these injections enters down-comer surge tank, down-comer is taken over, down-comer, in down-comer header and endothermic tube row, the liquid level of the water of these injections is by the liquid level gauge control of down-comer surge tank, make in down-comer surge tank, there is appropriate water, if the lower need of liquid level are by water injection pipe moisturizing when operation, the air bleeding valve of simultaneously opening on blast pipe is discharged the on-condensible gas in heat release chamber in heat release section cylindrical shell, if produced on-condensible gas in running, need the air bleeding valve by opening on blast pipe to discharge, when operation, water at low temperature enters the low temperature cavity of heat release section end socket by low temperature water inlet pipe, enter in heat release pipe row from low temperature cavity again, and high-temperature flue gas contacts with endothermic tube row, endothermic tube row absorbs the heat of high-temperature flue gas, water in endothermic tube row is heated into steam water interface, this steam water interface collects in tedge header, then enter in the heat release chamber of heat release section cylindrical shell through tedge and tedge adapter, this steam water interface is through heat release pipe row and water at low temperature heat exchange, water at low temperature in heat release pipe row is heated into high-temperature water, high-temperature water after heating is behind the high temperature chamber of heat release section end socket, discharge from high-temperature water outlet pipe, steam condensation Cheng Shui after steam water interface heat exchange in the heat release chamber of heat release section cylindrical shell passes through down-comer surge tank successively, down-comer is taken over, down-comer and down-comer header are back in endotherm section pipe row, again absorb the heat of high-temperature flue gas, thereby realize the vaporization of being heated of a recirculated water and having risen to the vaporization rising closed cycle of being heated again of condensing and declining.Make thus the heat-exchange method technique in the present invention simple, good effect of heat exchange.
As preferably, the wall temperature that the present invention detects down-comer when terminal control unit is during lower than flue gas acid dew point, regulate by the water at low temperature flow in the low temperature cavity of heat release section end socket by the water at low temperature adjustable valve aperture of controlling on low temperature water inlet pipe, thereby control the heat exchange amount in heat release chamber in heat release section cylindrical shell, thereby control the water temperature entering in down-comer, the wall temperature of assurance down-comer, all the time higher than the acid dew point of flue gas, is avoided cold end corrosion.
As preferably, when the present invention causes pressure to raise when occurring pipe excretion to reveal in running, carry out pressure release by the safety valve being arranged on heat release section cylindrical shell.
As preferably, the liquid level of the water of injection of the present invention is lower than the bottom position in heat release section cylindrical shell heat release chamber.
The present invention compared with prior art, have the following advantages and effect: 1, liquid level is drawn to heat release section cylindrical shell (when operation, heat release section cylindrical shell the inside does not have water), make all heat release pipe rows in heat release section cylindrical shell all participate in steam-water heat exchanging, be no longer that part steam-water heat exchanging adds the heat exchange of part water water, therefore heat transfer effect strengthens greatly; 2, liquid level is drawn to heat release cylindrical shell (when operation, heat release section cylindrical shell the inside does not have water), therefore there will be no the water in steam water interface and the heat release section cylindrical shell on tedge to impact, vibrations weaken greatly; 3, heat release section adopts flange to connect, and greatly facilitates maintenance and service work to it; 4, there is the feature of flexible arrangement, can level also can be arranged vertically; 5, can substitute economizer, complex phase-change heat exchanger and horizontal type phase-change heat exchanger completely, widely applicable.
Accompanying drawing explanation
Fig. 1 is the main TV structure schematic diagram of phase change heat exchange device in the embodiment of the present invention.
Fig. 2 is the left TV structure schematic diagram of phase change heat exchange device in the embodiment of the present invention.
In figure: 1-heat release section cylindrical shell, 2-heat release section blow-off pipe, 3-down-comer surge tank, 4-down-comer, 5-wall temperature temperature measurer, 6-down-comer header, 7-endothermic tube row, 8-terminal control unit, 9-tedge header, 10-tedge, 11-high-temperature water outlet mouth, 12-high-temperature water outlet pipe, 13-heat release section end socket, 14-low temperature water inlet pipe, 15-low temperature water inlet, 16-water injection pipe, 17-heat release pipe row, 18-safety valve, 19-heat release section blast pipe, 20-liquid level gauge, 21-water at low temperature adjustable valve, 22-tedge is taken over, 23-down-comer is taken over.
The specific embodiment
Below in conjunction with accompanying drawing and by embodiment, the present invention is described in further detail, and following examples are explanation of the invention and the present invention is not limited to following examples.
Embodiment.
Referring to Fig. 1 to Fig. 2, the phase change heat exchange device in the present embodiment comprises heat release section cylindrical shell 1, heat release section blow-off pipe 2, down-comer surge tank 3, down-comer 4, wall temperature temperature measurer 5, down-comer header 6, endothermic tube row 7, terminal control unit 8, tedge header 9, tedge 10, high-temperature water outlet pipe 12, heat release section end socket 13, low temperature water inlet pipe 14, water injection pipe 16, heat release pipe row 17, safety valve 18, heat release section blast pipe 19, liquid level gauge 20, water at low temperature adjustable valve 21, tedge adapter 22 and down-comer adapter 23.
In heat release section cylindrical shell 1 in the present embodiment, be a heat release chamber, a side of this heat release section cylindrical shell 1 is opening, and as shown in Figure 1, the left side of heat release section cylindrical shell 1 is opening.Heat release section blow-off pipe 2 in the present embodiment is arranged on the bottom of heat release section cylindrical shell 1, safety valve 18 and heat release section blast pipe 19 are installed in the top of heat release section cylindrical shell 1, and this heat release section blow-off pipe 2, safety valve 18 and heat release section blast pipe 19 are all communicated with the heat release chamber in heat release section cylindrical shell 1.
Heat release pipe row 17 in the present embodiment is arranged in the heat release chamber of heat release section cylindrical shell 1, this heat release pipe row 17 import and outlet are all positioned at the aperture position of heat release section cylindrical shell 1, in heat release section end socket 13, be provided with dividing plate, this heat release section end socket 13 is divided into separate low temperature cavity and high temperature chamber by dividing plate, under normal circumstances, the low temperature cavity in heat release section end socket 13 and high temperature chamber lay respectively at the first half and the latter half of heat release section end socket 13.Heat release section end socket 13 in the present embodiment is fixed on the opening of heat release section cylindrical shell 1, and under normal circumstances, heat release section end socket 13 is arranged on the opening of heat release section cylindrical shell 1 by flange.Heat release pipe row 17 import and the low temperature cavity of heat release section end socket 13 are communicated with, the low temperature cavity of heat release section end socket 13 is not communicated with the heat release chamber in heat release section cylindrical shell 1, heat release pipe row 17 outlet and the high temperature chamber of heat release section end socket 13 are communicated with, and the high temperature chamber of heat release section end socket 13 is not communicated with the heat release chamber in heat release section cylindrical shell 1.
Low temperature water inlet pipe 14 in the present embodiment and high-temperature water outlet pipe 12 are installed on heat release section end socket 13, this low temperature water inlet pipe 14 and high-temperature water outlet pipe 12 respectively with heat release section end socket 13 in low temperature cavity and high temperature chamber be communicated with, water at low temperature adjustable valve 21 is arranged on low temperature water inlet pipe 14, one end of water injection pipe 16 is arranged on heat release section cylindrical shell 1, the heat release chamber of one end of this water injection pipe 16 and heat release section cylindrical shell 1 is communicated with, the other end of water injection pipe 16 is arranged on low temperature water inlet pipe 14, and water at low temperature adjustable valve 21 is between the other end and heat release section end socket 13 of water injection pipe 16.Under normal circumstances, low temperature water inlet pipe 14 and high-temperature water outlet pipe 12 are arranged on respectively top and the bottom of heat release section end socket 13.The present embodiment can be provided with low temperature water inlet 15 on low temperature water inlet pipe 14, can be connected with extraneous inlet channel; On high-temperature water outlet pipe 12, can be provided with high-temperature water outlet mouth 11, can be connected with extraneous pipeline, low temperature water inlet is discharged by high-temperature water outlet mouth 11 after heating.
Down-comer surge tank 3 in the present embodiment is arranged on the bottom of heat release section cylindrical shell 1, the heat release chamber of this down-comer surge tank 3 and heat release section cylindrical shell 1 is communicated with, liquid level gauge 20 is arranged in down-comer surge tank 3, makes liquid level not in heat release section cylindrical shell 1, and when operation, heat release section cylindrical shell 1 the inside does not have water.One end of down-comer adapter 23 in the present embodiment is connected on down-comer surge tank 3, the other end of this down-comer adapter 23 is connected to one end of down-comer 4, the other end of down-comer 4 is connected in down-comer header 6, one end of endothermic tube row 7 is connected in down-comer header 6, this endothermic tube row 7 the other end is connected in tedge header 9, one end of tedge 10 is connected in tedge header 9, the other end of this tedge 10 is connected to tedge and takes over one end of 22, the other end of tedge adapter 22 is arranged on the bottom of heat release section cylindrical shell 1, the other end of this tedge adapter 22 and the heat release chamber of heat release section cylindrical shell 1 are communicated with.
Wall temperature temperature measurer 5 in the present embodiment is arranged on down-comer 4, and this wall temperature temperature measurer 5 and water at low temperature adjustable valve 21 are all connected on terminal control unit 8 by wire.
On heat release section blast pipe 19 in the present embodiment, can be provided with two air bleeding valves, on heat release section blow-off pipe 2, can be provided with two blowoff valves.
In the present embodiment, the step of the heat-exchange method of phase change heat exchange device is as follows: by water injection pipe 16 to water filling in the heat release chamber of heat release section cylindrical shell 1, the water of these injections enters down-comer surge tank 3, down-comer takes over 23, down-comer 4, in down-comer header 6 and endothermic tube row 7, the liquid level of the water of these injections is controlled by the liquid level gauge 20 of down-comer surge tank 3, make in down-comer surge tank 3, there is appropriate water, if the lower need of liquid level are by water injection pipe 16 moisturizings when operation, the air bleeding valve of simultaneously opening on blast pipe 19 is discharged the on-condensible gas in heat release chamber in heat release section cylindrical shell 1, if produced on-condensible gas in running, need the air bleeding valve by opening on blast pipe 19 to discharge, the liquid level of the water injecting is lower than the bottom position in heat release section cylindrical shell 1 heat release chamber.
When operation, water at low temperature enters the low temperature cavity of heat release section end socket 13 by low temperature water inlet pipe 14, enter in heat release pipe row 17 from low temperature cavity again, and high-temperature flue gas contacts with endothermic tube row 7, endothermic tube row 7 absorbs the heat of high-temperature flue gas, water in endothermic tube row 7 is heated into steam water interface, this steam water interface collects in tedge header 9, then enter in the heat release chamber of heat release section cylindrical shell 1 through tedge 10 and tedge adapter 22, this steam water interface is through heat release pipe row 17 and water at low temperature heat exchange, water at low temperature in heat release pipe row 17 is heated into high-temperature water, high-temperature water after heating is behind the high temperature chamber of heat release section end socket 13, discharge from high-temperature water outlet pipe 12, steam condensation Cheng Shui after steam water interface heat exchange in the heat release chamber of heat release section cylindrical shell 1 passes through down-comer surge tank 3 successively, down-comer takes over 23, down-comer 4 and down-comer header 6 are back in endotherm section pipe row 7, again absorb the heat of high-temperature flue gas, thereby realize the vaporization of being heated of a recirculated water and having risen to the vaporization rising closed cycle of being heated again of condensing and declining.
The wall temperature that the present embodiment detects down-comer 4 when terminal control unit 8 is during lower than flue gas acid dew point, regulate by the water at low temperature flow in the low temperature cavity of heat release section end socket 13 by water at low temperature adjustable valve 21 apertures of controlling on low temperature water inlet pipe 14, thereby control the heat exchange amount in heat release chamber in heat release section cylindrical shell 1, thereby control the water temperature entering in down-comer 4, the wall temperature of assurance down-comer 4, all the time higher than the acid dew point of flue gas, is avoided cold end corrosion.While causing pressure to raise when occurring pipe excretion to reveal in running, carry out pressure release by the safety valve 18 being arranged on heat release section cylindrical shell 1.
In addition, it should be noted that, the specific embodiment described in this description, shape, institute's title of being named etc. of its parts and components can be different, and the above content described in this description is only to structure example of the present invention explanation.All equivalence variation or simple change of doing according to described structure, feature and the principle of patent design of the present invention, are included in the protection domain of patent of the present invention.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present invention or surmount this scope as defined in the claims, all should belong to protection scope of the present invention.
Claims (9)
1. a phase change heat exchange device, it is characterized in that: comprise heat release section cylindrical shell, heat release section blow-off pipe, down-comer surge tank, down-comer, wall temperature temperature measurer, down-comer header, endothermic tube row, terminal control unit, tedge header, tedge, high-temperature water outlet pipe, heat release section end socket, low temperature water inlet pipe, water injection pipe, heat release pipe row, safety valve, heat release section blast pipe, liquid level gauge, water at low temperature adjustable valve, tedge is taken over and down-comer is taken over, it in described heat release section cylindrical shell, is a heat release chamber, one side of this heat release section cylindrical shell is opening, described heat release section blow-off pipe is arranged on the bottom of heat release section cylindrical shell, described safety valve and heat release section blast pipe are installed in the top of heat release section cylindrical shell, this heat release section blow-off pipe, safety valve and heat release section blast pipe are all communicated with the heat release chamber in heat release section cylindrical shell, described heat release pipe row is arranged in the heat release chamber of heat release section cylindrical shell, this heat release pipe row's import and outlet are all positioned at the aperture position of heat release section cylindrical shell, in described heat release section end socket, be provided with dividing plate, this heat release section end socket is divided into separate low temperature cavity and high temperature chamber by dividing plate, described heat release section end socket is fixed on the opening of heat release section cylindrical shell, described heat release pipe row's import and the low temperature cavity of heat release section end socket are communicated with, and this heat release pipe row's outlet and the high temperature chamber of heat release section end socket are communicated with, described low temperature water inlet pipe and high-temperature water outlet pipe are installed on heat release section end socket, this low temperature water inlet pipe and high-temperature water outlet pipe respectively with heat release section end socket in low temperature cavity and high temperature chamber be communicated with, described water at low temperature adjustable valve is arranged on low temperature water inlet pipe, one end of described water injection pipe is arranged on heat release section cylindrical shell, the heat release chamber of one end of this water injection pipe and heat release section cylindrical shell is communicated with, and the other end of described water injection pipe is arranged on low temperature water inlet pipe, described down-comer surge tank is arranged on the bottom of heat release section cylindrical shell, the heat release chamber of this down-comer surge tank and heat release section cylindrical shell is communicated with, described liquid level gauge is arranged in down-comer surge tank, one end that described down-comer is taken over is connected on down-comer surge tank, the other end that this down-comer is taken over is connected to one end of down-comer, the other end of described down-comer is connected in down-comer header, one end of described endothermic tube row is connected in down-comer header, this endothermic tube row's the other end is connected in tedge header, one end of described tedge is connected in tedge header, the other end of this tedge is connected to one end that tedge is taken over, the other end that described tedge is taken over is arranged on the bottom of heat release section cylindrical shell, the other end that this tedge is taken over and the heat release chamber of heat release section cylindrical shell are communicated with, described wall temperature temperature measurer is arranged on down-comer, and this wall temperature temperature measurer and water at low temperature adjustable valve are all connected on terminal control unit by wire.
2. phase change heat exchange device according to claim 1, it is characterized in that: the low temperature cavity in described heat release section end socket and high temperature chamber lay respectively at the first half and the latter half of heat release section end socket, described low temperature water inlet pipe and high-temperature water outlet pipe are arranged on respectively top and the bottom of heat release section end socket.
3. phase change heat exchange device according to claim 1, is characterized in that: described heat release section end socket is arranged on the opening of heat release section cylindrical shell by flange.
4. according to the phase change heat exchange device described in claim 1 or 2 or 3, it is characterized in that: on described heat release section blast pipe, be provided with two air bleeding valves.
5. according to the phase change heat exchange device described in claim 1 or 2 or 3, it is characterized in that: on described heat release section blow-off pipe, be provided with two blowoff valves.
6. the heat-exchange method of the phase change heat exchange device as described in a claim as arbitrary in claim 1-5, it is characterized in that: step is as follows: by water injection pipe to water filling in the heat release chamber of heat release section cylindrical shell, the water of these injections enters down-comer surge tank, down-comer is taken over, down-comer, in down-comer header and endothermic tube row, the liquid level of the water of these injections is by the liquid level gauge control of down-comer surge tank, make in down-comer surge tank, there is appropriate water, if the lower need of liquid level are by water injection pipe moisturizing when operation, the air bleeding valve of simultaneously opening on blast pipe is discharged the on-condensible gas in heat release chamber in heat release section cylindrical shell, if produced on-condensible gas in running, need the air bleeding valve by opening on blast pipe to discharge, when operation, water at low temperature enters the low temperature cavity of heat release section end socket by low temperature water inlet pipe, enter in heat release pipe row from low temperature cavity again, and high-temperature flue gas contacts with endothermic tube row, endothermic tube row absorbs the heat of high-temperature flue gas, water in endothermic tube row is heated into steam water interface, this steam water interface collects in tedge header, then enter in the heat release chamber of heat release section cylindrical shell through tedge and tedge adapter, this steam water interface is through heat release pipe row and water at low temperature heat exchange, water at low temperature in heat release pipe row is heated into high-temperature water, high-temperature water after heating is behind the high temperature chamber of heat release section end socket, discharge from high-temperature water outlet pipe, steam condensation Cheng Shui after steam water interface heat exchange in the heat release chamber of heat release section cylindrical shell passes through down-comer surge tank successively, down-comer is taken over, down-comer and down-comer header are back in endotherm section pipe row, again absorb the heat of high-temperature flue gas, thereby realize the vaporization of being heated of a recirculated water and having risen to the vaporization rising closed cycle of being heated again of condensing and declining.
7. heat-exchange method according to claim 6, it is characterized in that: the wall temperature that down-comer detected when terminal control unit is during lower than flue gas acid dew point, regulate by the water at low temperature flow in the low temperature cavity of heat release section end socket by the water at low temperature adjustable valve aperture of controlling on low temperature water inlet pipe, thereby control the heat exchange amount in heat release chamber in heat release section cylindrical shell, thereby control the water temperature entering in down-comer, the wall temperature of assurance down-comer, all the time higher than the acid dew point of flue gas, is avoided cold end corrosion.
8. heat-exchange method according to claim 6, is characterized in that: while causing pressure to raise when occurring pipe excretion to reveal in running, carry out pressure release by the safety valve being arranged on heat release section cylindrical shell.
9. according to the heat-exchange method described in claim 6 or 7 or 8, it is characterized in that: the liquid level of the water of described injection is lower than the bottom position in heat release section cylindrical shell heat release chamber.
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| CN201410130328.5A CN103900410B (en) | 2014-04-02 | 2014-04-02 | A kind of phase change heat exchange device and heat-exchange method thereof |
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| CN201410130328.5A CN103900410B (en) | 2014-04-02 | 2014-04-02 | A kind of phase change heat exchange device and heat-exchange method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105277027A (en) * | 2015-11-05 | 2016-01-27 | 吉林省电力科学研究院有限公司 | Phase-change heat exchanger and heat exchange method thereof |
| CN105486142A (en) * | 2015-12-11 | 2016-04-13 | 北京三益能环工程技术有限公司 | Oval finned tube type heat exchanger and oval finned tube type intelligent phase-change heat exchange device |
| CN105571354A (en) * | 2016-02-04 | 2016-05-11 | 杭州华电能源工程有限公司 | Flue gas waste heat recovery device and method based on double-U-shaped tube shell type heat exchanger |
| CN110425923A (en) * | 2019-08-19 | 2019-11-08 | 四川奥格莱能源科技有限公司 | A kind of heat exchanger two coupler apparatus |
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| CN105277027A (en) * | 2015-11-05 | 2016-01-27 | 吉林省电力科学研究院有限公司 | Phase-change heat exchanger and heat exchange method thereof |
| CN105486142A (en) * | 2015-12-11 | 2016-04-13 | 北京三益能环工程技术有限公司 | Oval finned tube type heat exchanger and oval finned tube type intelligent phase-change heat exchange device |
| CN105571354A (en) * | 2016-02-04 | 2016-05-11 | 杭州华电能源工程有限公司 | Flue gas waste heat recovery device and method based on double-U-shaped tube shell type heat exchanger |
| CN110425923A (en) * | 2019-08-19 | 2019-11-08 | 四川奥格莱能源科技有限公司 | A kind of heat exchanger two coupler apparatus |
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| CN103900410B (en) | 2015-12-30 |
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