CN203501139U - Double-pipe phase change heat exchanger - Google Patents
Double-pipe phase change heat exchanger Download PDFInfo
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- CN203501139U CN203501139U CN201320419071.6U CN201320419071U CN203501139U CN 203501139 U CN203501139 U CN 203501139U CN 201320419071 U CN201320419071 U CN 201320419071U CN 203501139 U CN203501139 U CN 203501139U
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- segment
- pipe
- wall temperature
- temperature
- change heat
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Abstract
The utility model relates to a double-pipe phase change heat exchanger. On the basis of the conventional phase change heat exchanger, a double-pipe heat exchange pipe which serves as a wall temperature segment and consists of an inner pipe and an outer pipe is additionally arranged; the wall temperature segment is formed on the front part of a horizontal flue on the tail part of a boiler; an evaporation segment is formed on the back part of the horizontal flue on the tail part of the boiler; the front part of the wall temperature segment is provided with a flue gas inlet; the back part of the evaporation segment is provided with a flue gas outlet; the steam inlet of the outer pipe of the wall temperature segment is connected with an upper header of the evaporation segment through a communicating pipe, and a steam outlet at the other end of the outer pipe is connected to the condensation segment through an ascending pipe; the condensation segment is connected to a lower header of the evaporation segment through a descending pipe and the inner pipe of the wall temperature segment. The double-pipe phase change heat exchanger has the advantages that after the wall temperature segment is additionally arranged on the phase change heat exchanger, the problem of low temperature of condensed return water is solved completely; moreover, in the wall temperature segment, saturated steam is heated into overheated steam by using high-temperature flue gas, and the overheated steam is used for heating condensed water, so that the condensed water is heated without being vaporized in the descending pipe. The temperature of the condensed water is high, so that the temperature of the entire wall surface of the vaporization segment is above an acid dew point, and a heated surface on a flue gas side is prevented from being dewed or corroded by accumulated ash.
Description
Technical field
The utility model relates to a kind of heat exchanger, especially relates to a kind of bushing type phase-change heat-exchanger.
Background technology
Phase-change heat-exchanger described in the utility model is the heat recovery to back-end ductwork in boiler.Existing phase-change heat-exchanger as shown in Figure 1.Its evaporator section 2 is arranged in the flue of boiler; Described condensation segment 14 is connected with upper collecting chamber 1 by tedge, and the down-comer 6 of condensation segment 14 is connected with lower header 3, between upper collecting chamber 1 and lower header, by evaporator section 2, is connected.Sensor 5 is arranged in down-comer 6, and wall temperature sensor 5 input signals are electrically connected to control logic 18.Flue-gas temperature tester 8 is arranged on gas approach place, and is electrically connected to control logic 18.19 inputs of condensation segment water inlet control valve and output signal are electrically connected to control logic 18.Pressure gauge 17 is fixedly connected with condensation segment 14, and safety valve 16 is fixedly connected with condensation segment 14, and vacuum valve group 15 is fixedly connected with condensation segment 14.The operation principle of the utility model phase-change heat-exchanger is as follows: in evaporator section 2, inject a certain amount of demineralized water, this water becomes saturated vapor in evaporator section 2, steam enters condensation segment 14 shell sides by tedge 9, condensation segment 14 is tubular heat exchanger, and condensation segment water inlet control valve 19 goes out Water gate valve 13 with condensation segment and is connected with condensation segment 14 tube sides.The middle steam of condensation segment 14 shell sides is by water heating in tube side, and steam is emitted heat and is condensed into water, and water flow to lower header 3 by down-comer 6, forms sealing and circulating.Water in condensation segment 14 tube sides is delivered in steam generator system and is used through heating.In heat exchanger, though be the environment of near vacuum, the interior condensate water water temperature of down-comer 6 and the saturated vapor of condensation segment 14 still have certain temperature difference.The discharge of condensation segment 14 tube sides can be controlled the wall surface temperature of phase-change heat-exchanger.
Summary of the invention
Object of the present invention: set up a wall temperature section before evaporator section, entering before evaporator section at condensed water, condensed water water temperature is raise, the excessively cold problem of condensed water is solved, and also makes phase-change heat-exchanger integral wall surface temperature more than acid dew point.
The utility model is achieved in that a kind of bushing type phase-change heat-exchanger, comprises condensation segment, evaporator section.It is characterized in that, also comprise wall temperature section, described wall temperature section is sleeve-type heat exchanging pipe, is divided into inner and outer tubes.It is anterior that wall temperature section is arranged on boiler tail horizontal flue, and evaporator section is arranged on boiler tail horizontal flue rear portion, and there is gas approach wall temperature section front portion, and there is exhanst gas outlet at evaporator section rear portion.The steam inlet of described wall temperature section outer tube is connected with the upper collecting chamber of evaporator section by cross over pipe, and the steam (vapor) outlet of its other end is connected to condensation segment by tedge.Condensation segment is connected to the lower header of evaporator section by the inner tube of down-comer and wall temperature section.
The utility model has the advantage of: when phase-change heat-exchanger has increased after wall temperature section, thoroughly solved the not high problem of coagulation hydroenergy backwater water temperature, and this wall temperature section utilizes high-temperature flue gas heating saturated vapor to become superheated steam, superheated steam is heat-setting water again, condensate water water temperature raises, and in down-comer, does not produce again vaporization.Condensate water water temperature is high, makes evaporator section integral wall surface temperature more than acid dew point, has avoided fume side heating surface dewfall and dust stratification corrosion.Newly-increased wall temperature segment structure is simple, manufactures easy for installationly, and cost increases slightly, has improved device security, has extended service life of equipment.And wall temperature section is utilized fume afterheat, do not consume other thermal source.
accompanying drawing explanation
Fig. 1: be existing phase-change heat-exchanger fundamental diagram.
Fig. 2: be phase-change heat-exchanger fundamental diagram of the present utility model.
the specific embodiment
Bushing type phase-change heat-exchanger of the present utility model, on the basis of prior art, increases by a wall temperature section 7, and described wall temperature section 7 is sleeve-type heat exchanging pipe, inner and outer tubes, consists of.It is anterior that wall temperature section 7 is arranged on boiler tail horizontal flue, and evaporator section 2 is arranged on boiler tail horizontal flue rear portion; There is gas approach wall temperature section 7 front portions, and there is exhanst gas outlet at evaporator section 2 rear portions.The steam inlet 10 of described wall temperature section 7 outer tubes is connected with the upper collecting chamber 1 of evaporator section 2 by cross over pipe, and the steam (vapor) outlet 11 of its other end is connected to condensation segment 14 by tedge 12; Condensation segment 14 is connected to the lower header 3 of evaporator section 2 by the inner tube of down-comer 6 and wall temperature section 7, other accessories are substantially constant.
Phase-change heat-exchanger, before coming into operation, first passes through exhaust, makes phase-change heat-exchanger inside close to the environment of vacuum, guarantees that saturated-steam temperature and condensed water water temperature are basically identical.But in use, there is to a certain degree excessively cold in condensed water water temperature, and condensed water water temperature is lower than saturated-steam temperature.Conventionally, the measured wall surface temperature of phase-change heat-exchanger is saturated-steam temperature, if condensed water is lower than saturated-steam temperature, phase-change heat-exchanger integral wall surface temperature just can not be guaranteed like this.
Owing to setting up a wall temperature section 7 before evaporator section 2, so condensed water is before entering evaporator section, and condensed water water temperature is improved, and the excessively cold problem of condensed water is resolved, and finally makes phase-change heat-exchanger integral wall surface temperature more than acid dew point.
In evaporator section inside, be filled with a certain amount of demineralized water, through flue gas, medium is heated as to gaseous state by liquid state, saturated vapor converges by entering wall temperature section communicating pipe at evaporator section upper collecting chamber place, through high-temperature flue gas, be heated to be the superheated steam of certain degree of superheat, through wall temperature section, outlet enters condensation segment heat release by vapor uptake, and condensed water is back to evaporator section by down-comer by wall temperature section poling.On-condensible gas can regularly be discharged by vacuum valve group.Wall temperature sensor input signal imports control logic into, according to wall temperature feedback signal, regulates condensation segment water inlet control valve aperture, and wall temperature temperature is regulated in real time.
Claims (1)
1. a bushing type phase-change heat-exchanger, comprises condensation segment (14), evaporator section (2), it is characterized in that, also comprise wall temperature section (7), described wall temperature section (7) is sleeve-type heat exchanging pipe, is divided into inner and outer tubes; It is anterior that wall temperature section (7) is arranged on boiler tail horizontal flue, and evaporator section (2) is arranged on boiler tail horizontal flue rear portion; There is gas approach wall temperature section (7) front portion, and there is exhanst gas outlet at evaporator section (2) rear portion; The steam inlet (10) of described wall temperature section (7) outer tube is connected with the upper collecting chamber (1) of evaporator section (2) by cross over pipe, and the steam (vapor) outlet of its other end (11) is connected to condensation segment (14) by tedge (12); Condensation segment (14) is connected to the lower header (3) of evaporator section (2) by the inner tube of down-comer (6) and wall temperature section (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320419071.6U CN203501139U (en) | 2013-07-15 | 2013-07-15 | Double-pipe phase change heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320419071.6U CN203501139U (en) | 2013-07-15 | 2013-07-15 | Double-pipe phase change heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203501139U true CN203501139U (en) | 2014-03-26 |
Family
ID=50332115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320419071.6U Expired - Lifetime CN203501139U (en) | 2013-07-15 | 2013-07-15 | Double-pipe phase change heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203501139U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716791A (en) * | 2018-07-10 | 2018-10-30 | 吉林大学 | There are two types of the automobile double pipe heat exchangers of working condition for a kind of tool |
-
2013
- 2013-07-15 CN CN201320419071.6U patent/CN203501139U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716791A (en) * | 2018-07-10 | 2018-10-30 | 吉林大学 | There are two types of the automobile double pipe heat exchangers of working condition for a kind of tool |
| CN108716791B (en) * | 2018-07-10 | 2024-04-16 | 吉林大学 | Double pipe type heat exchanger with two working states for automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140326 |
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| CX01 | Expiry of patent term | ||
| CU01 | Correction of utility model |
Correction item: Termination upon expiration of patent Correct: Revocation of Patent Expiration and Termination False: Expiration and Termination of 39 Volume 3101 Patent on August 1, 2023 Number: 31-01 Volume: 39 |
|
| CU01 | Correction of utility model |