CN202470092U - Composite phase-change heat exchanger - Google Patents
Composite phase-change heat exchanger Download PDFInfo
- Publication number
- CN202470092U CN202470092U CN2012200183155U CN201220018315U CN202470092U CN 202470092 U CN202470092 U CN 202470092U CN 2012200183155 U CN2012200183155 U CN 2012200183155U CN 201220018315 U CN201220018315 U CN 201220018315U CN 202470092 U CN202470092 U CN 202470092U
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- change heat
- heat exchanger
- exchanger
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Abstract
The utility model relates to residual heat recovery and utilization devices, in particular to a composite phase-change heat exchanger. The composite phase-change heat exchanger comprises a flue, an air preheater and steam drums, wherein the flue is located below the air preheater, and the steam drums are connected with a steam drum flow control valve. The composite phase-change heat exchanger further comprises a phase-change heat exchanger, wherein the phase-change heat exchanger comprises an upper-section phase-change heat exchanger and a lower-section phase-change heat exchanger, the upper-section phase-change heat exchanger is located at an air channel outlet of the air preheater, and the lower-section phase-change heat exchanger is located behind the upper-section phase-change heat exchanger. Compared with the prior art, the composite phase-change heat exchanger has the advantages that the residual heat of tail gas can be effectively recovered to heat, on one hand, the residual heat of flue gas is used for heating boiler feed water, and on the other hand, the phenomenon of moisture condensation is guaranteed not to occur, so that the production cost is reduced, the temperature of exhaust gas is greatly reduced, and the heat pollution to the environment is reduced.
Description
Technical field
The utility model relates to waste heat recovery and use device, relates in particular to a kind of complex phase-change heat exchanger.
Background technology
Complex phase-change heat exchanger is meant the heat exchanger that thermal medium undergoes phase transition in heat transfer process; It has utilized the big characteristics of heat output in the liquid phase-change process; According to various instructions for uses; By means of shunting mode that cold fluid and hot fluid is set and proportioning mode, realize the optimum organization of modern high-performance heat exchanger different structure form, and be configured to the complex phase-change heat exchanger of different concrete forms.It can maintain higher temperature levels with whole low-temperature zone heating surface wall temperature when reducing the toxic emission temperature by a relatively large margin, can improve and use hot device heat efficiency, can avoid again causing the stifled phenomenon of cold end corrosion and ash because of dewfall.But existing heat exchanger makes exhaust heat-energy not recycle because condensation trouble, waste greatlyyer, environment is caused thermal pollution, the production cost increase.
Summary of the invention
The purpose of the utility model is to avoid weak point of the prior art and a kind of complex phase-change heat exchanger is provided, and it can reclaim using waste heat from tail gas effectively, makes full use of waste heat, reduces production costs, and reduces exhaust gas temperature significantly, reduces environmental thermal pollution.
The purpose of the utility model realizes through following technical scheme:
A kind of complex phase-change heat exchanger; Comprise flue, air preheater and drum, flue is positioned at the below of air preheater, and drum is connected with the drum flow control valve; Also comprise phase-change heat-exchanger; The phase heat exchanger comprises epimere phase-change heat-exchanger and hypomere phase-change heat-exchanger, and the epimere phase-change heat-exchanger is positioned at the ducting outlet place of air preheater, and the hypomere phase-change heat-exchanger is positioned at the rear of epimere phase-change heat-exchanger.
Wherein, also include the wall temperature tester, the wall temperature tester connects the hypomere phase-change heat-exchanger.
Wherein, also include flowmeter, flowmeter connects drum.
Wherein, also comprise the control system, the control system is connected with the wall temperature tester, and the control system is connected with the drum flow control valve.
Wherein, the control system is connected with Pressure gauge, and the control system is connected with the dedusting by-pass valve control.
Wherein, drum is two.
The beneficial effect of the utility model: a kind of complex phase-change heat exchanger; Comprise flue, air preheater and drum, flue is positioned at the below of air preheater, and drum is connected with the drum flow control valve; Also comprise phase-change heat-exchanger; The phase heat exchanger comprises epimere phase-change heat-exchanger and hypomere phase-change heat-exchanger, and the epimere phase-change heat-exchanger is positioned at the ducting outlet place of air preheater, and the hypomere phase-change heat-exchanger is positioned at the rear of epimere phase-change heat-exchanger.Compared with prior art, the utility model can reclaim the using waste heat from tail gas heating effectively, and just fume afterheat is used for the heating boiler feedwater on the one hand; Guarantee on the other hand not produce the dewfall phenomenon, make full use of waste heat, reduce production costs; Reduce exhaust gas temperature significantly, reduce environmental thermal pollution.
Description of drawings
Utilize accompanying drawing to come the utility model is further described below, but the embodiment in the accompanying drawing does not constitute any restriction to the utility model.
Fig. 1 is the structural representation of an embodiment of the utility model.
1---flue;
2---air preheater;
3---flowmeter;
4---drum;
5---the drum flow control valve;
6---the control system;
7---the wall temperature tester;
8---phase-change heat-exchanger;
81---the epimere phase-change heat-exchanger;
82---the hypomere phase-change heat-exchanger.
The specific embodiment
See Fig. 1, come the utility model is further explained below in conjunction with embodiment.
Complex phase-change heat exchanger in the present embodiment; Comprise flue 1, air preheater 2 and drum 4, flue 1 is positioned at the below of air preheater 2, and drum 4 is connected with drum flow control valve 5; Also comprise phase-change heat-exchanger 8; Phase heat exchanger 8 comprises epimere phase-change heat-exchanger 81 and hypomere phase-change heat-exchanger 82, and epimere phase-change heat-exchanger 81 is positioned at the ducting outlet place of air preheater 2, and hypomere phase-change heat-exchanger 82 is positioned at the rear of epimere phase-change heat-exchanger 81.The orientation of mentioning in the present embodiment " back " is a reference direction with the flow of flue gas direction of complex phase-change heat exchanger.High-temperature flue gas at first gets into air preheater 2 to boiler air-supply heat release; Get into epimere phase-change heat-exchanger 81 again, get into hypomere phase-change heat-exchanger 82 at last, outlet cigarette temperature is only high about 20 ℃ than heating surface wall temperature after phase-change heat-exchanger 8 inner chamber heat transfer agent heat releases.Phase-change heat-exchanger 8 absorbs flue gas heat makes the phase change medium of its inner chamber undergo phase transition and produce steam, returns phase-change heat-exchanger 8 with the condensate that feedwater carries out producing after the heat exchange.Whole heat transfer process is exactly the phase transition process of phase change medium evaporation and condensation, and the temperature of phase change medium phase transformation situation under certain pressure is substantially invariable.Heat exchanger this moment heating surface wall surface temperature under the phase transformation situation is approximately equal to phase transition temperature, so phase-change heat-exchanger 8 heating surface wall temperatures are in whole controllable state, away from flue gas acid dew point.Compared with prior art, the utility model can reclaim the using waste heat from tail gas heating effectively, and just fume afterheat is used for the heating boiler feedwater on the one hand; Guarantee on the other hand not produce dewfall, make full use of waste heat, reduce production costs; Reduce exhaust gas temperature significantly, reduce environmental thermal pollution.
In the present embodiment, also include wall temperature tester 7, wall temperature tester 7 connects hypomere phase-change heat-exchanger 82.Wall temperature tester 7 is used to detect the temperature of hypomere phase-change heat-exchanger 82.
In the present embodiment, also include flowmeter 3, flowmeter 3 connects drum 4.Flowmeter 3 is used to detect the flow of drum 4.
In the present embodiment, also comprise control system 6, control system 6 is connected with wall temperature tester 7, and control system 6 is connected with drum flow control valve 5.Wall temperature tester 7 feeds back to detected temperature signal the signal input part of control system 6; The signal output part of control system 6 sends control signal to drum flow control valve 5; Regulate the flow of boiler feedwater again through drum flow control valve 5, realize control the wall temperature and the exit gas temperature of complex phase-change heat exchanger.
In the present embodiment, control system 6 is connected with Pressure gauge, and control system 6 is connected with the dedusting by-pass valve control.Control system 6 guarantees that through Pressure gauge control boiler exhaust gas blast the boiler exhaust gas blast is in scope; Control system 6 is through the operation of dedusting by-pass valve control control deduster, and assurance can not influence the operation of deduster.
In the present embodiment, drum 4 is two.Higher when boiler temperature, when needing to reduce temperature fast, can open two drums 4, be convenient to fast cooling.
Above content is merely the preferred embodiment of the utility model; For those of ordinary skill in the art; According to the thought of the utility model, the part that on the specific embodiment and range of application, all can change, this description should not be construed as the restriction to the utility model.
Claims (6)
1. complex phase-change heat exchanger; Comprise flue (1), air preheater (2) and drum (4); Said flue (1) is positioned at the below of air preheater (2); Said drum (4) is connected with drum flow control valve (5), it is characterized in that: also comprise phase-change heat-exchanger (8), said phase heat exchanger (8) comprises epimere phase-change heat-exchanger (81) and hypomere phase-change heat-exchanger (82); Said epimere phase-change heat-exchanger (81) is positioned at the ducting outlet place of air preheater (2), and said hypomere phase-change heat-exchanger (82) is positioned at the rear of epimere phase-change heat-exchanger (81).
2. a kind of complex phase-change heat exchanger according to claim 1 is characterized in that: also include wall temperature tester (7), said wall temperature tester (7) connects said hypomere phase-change heat-exchanger (82).
3. a kind of complex phase-change heat exchanger according to claim 1 is characterized in that: also include flowmeter (3), said flowmeter (3) connects said drum (4).
4. a kind of complex phase-change heat exchanger according to claim 2; It is characterized in that: also comprise control system (6); Said control system (6) is connected with said wall temperature tester (7), and said control system (6) is connected with said drum flow control valve (5).
5. a kind of complex phase-change heat exchanger according to claim 1 is characterized in that: said control system (6) is connected with Pressure gauge, and said control system (6) is connected with the dedusting by-pass valve control.
6. according to any described a kind of complex phase-change heat exchanger in the claim 1 to 5, it is characterized in that: said drum (4) is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200183155U CN202470092U (en) | 2012-01-16 | 2012-01-16 | Composite phase-change heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200183155U CN202470092U (en) | 2012-01-16 | 2012-01-16 | Composite phase-change heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202470092U true CN202470092U (en) | 2012-10-03 |
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ID=46918247
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200183155U Expired - Lifetime CN202470092U (en) | 2012-01-16 | 2012-01-16 | Composite phase-change heat exchanger |
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| Country | Link |
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| CN (1) | CN202470092U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224459A (en) * | 2017-11-30 | 2018-06-29 | 江苏理文造纸有限公司 | A kind of boiler smoke heat energy recovering method |
| CN109737447A (en) * | 2019-01-21 | 2019-05-10 | 广东双燃节能环保科技有限公司 | A kind of boiler heat-energy recovery system |
-
2012
- 2012-01-16 CN CN2012200183155U patent/CN202470092U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108224459A (en) * | 2017-11-30 | 2018-06-29 | 江苏理文造纸有限公司 | A kind of boiler smoke heat energy recovering method |
| CN109737447A (en) * | 2019-01-21 | 2019-05-10 | 广东双燃节能环保科技有限公司 | A kind of boiler heat-energy recovery system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121003 |
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| CX01 | Expiry of patent term |