CN104879773A - Air preheater for heat exchange of flow layer - Google Patents
Air preheater for heat exchange of flow layer Download PDFInfo
- Publication number
- CN104879773A CN104879773A CN201510277437.4A CN201510277437A CN104879773A CN 104879773 A CN104879773 A CN 104879773A CN 201510277437 A CN201510277437 A CN 201510277437A CN 104879773 A CN104879773 A CN 104879773A
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- China
- Prior art keywords
- heat exchange
- heat exchanger
- exchanger tube
- exchange pipe
- tank
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention provides an air preheater for heat exchange of a flow layer. The air preheater for heat exchange of the flow layer comprises a heat exchange pipe, a water tank used for storing water is transversely arranged at the air inlet end of the heat exchange pipe, the top end of the heat exchange pipe penetrates through a penetrating hole formed in the bottom end of the water tank and is located above the liquid level of the water tank, and multiple water inlet holes are formed in the lateral wall of the heat exchange pipe and located inside the water tank. Heat of high temperature smoke entering the heat exchange pipe is rapidly transferred to a flowing water film of the inner wall of the heat exchange pipe rapidly, the flowing water film transfers heat to the outer wall of the heat exchange pipe, inlet cold air is heated when flowing through the outer wall of the heat exchange pipe and then is fed into a boiler, and the purpose of heating air is achieved. The heat exchange efficiency of the whole air preheater is improved, it is avoided that dust accumulates on the inner wall of the heat exchange pipe and abrades the heat exchange pipe, and the service life of the heat exchange pipe and the air preheater is prolonged.
Description
Technical field
The present invention relates to a kind of air preheater, particularly relate to a kind of air preheater utilizing fluidized bed to carry out heat exchange.
Background technology
Air preheater is used for coal-fired power station boiler, is exactly that the flue gas in boiler back end ductwork enters the heating surface of the air preheat before boiler to uniform temperature by the fin of its inside.For improving the heat exchange performance of boiler, reduce energy ezpenditure.
The air preheater of current steam boiler, heat conducting oil boiler etc. adopts pipe heat exchanger mostly, namely high-temperature flue gas flows through from heat exchanger tube inside, and air passes through from heat exchanger tube outside, conducted heat by temperature difference difference, flue gas transfers heat to air, makes the air entered in boiler carry out preheating.Because pipe heat exchanger in use weares and teares larger; Cause because dust in flue gas is large dust stratification serious in addition, cause heat exchange efficiency not high.Service time can there is dew point corrosion phenomenon in long heat exchanger tube, causes its service life shorter, the use cost of increase.
Summary of the invention
The present invention will solve above-mentioned deficiency exactly, provides a kind of air preheater utilizing fluidized bed heat exchange.
In order to achieve the above object, the invention provides a kind of air preheater of fluidized bed heat exchange, comprise heat exchanger tube, the inlet end of described heat exchanger tube is laterally provided with the tank for water storage, and described heat exchanger tube top is positioned at the top of tank liquid level through the perforation being located at tank bottom; The heat exchanger tube sidewall being positioned at tank inside is provided with multiple inlet opening.
Further, in order to the water using inlet opening to enter heat exchanger tube forms equally distributed moisture film at heat exchanger tube inwall, the top of described heat exchanger tube is arranged with a point water cap.
Further, in order to avoid entering the air drop pan impact of heat exchange, described tank is frame-type, and the top of described heat exchanger tube is positioned at above tank through tank, and described heat exchanger tube and tank junction are for being tightly connected.
Further, described point of water cap is the top that N-shaped is fastened in heat exchanger tube, and its length being positioned at the side of heat exchanger tube inwall is not less than the height of described tank.
Tank inside forms flowing water layer by recirculated water, water in tank is entered in heat exchanger tube by the inlet opening being located at heat exchanger tube top and manages, and by point water cap that is set in heat exchanger tube top, the water entered in heat exchanger tube is evenly distributed on the inwall of heat exchanger tube, namely water forms the moisture film of one deck flowing on the inwall of heat exchanger tube, when high-temperature flue gas enters in heat exchanger tube, its heat passes to rapidly the flowing moisture film of heat exchanger tube inwall, moisture film is delivered to heat the outer wall of heat exchanger tube again, the boiler and the cold air entered is made a gift to someone after being heated when flowing through heat exchanger tube outer wall, reach the object adding hot-air.
Beneficial effect of the present invention is embodied in:
1, the coefficient of heat transfer due to flue gas and water is comparatively large, and the coefficient of heat transfer of water and carbon steel is comparatively large, so the whole equipment heat exchange efficiency of the air preheater of the present invention efficiency that direct and carbon steel carries out heat exchange than traditional tube-type air preheater flue gas improves tens times.
The dust entering heat exchanger tube inside is flushed to bottom it and collects by the moisture film that 2, flows, finally by circulating water take out of carry out precipitating, neutralisation treatment, then also squeeze in tank by kinetic pump and use as recirculated water.
3, the present invention forms circulating water layer owing to being provided with tank at the top of heat exchanger tube, fundamentally solves the wearing and tearing of heat exchanger tube and the problem of dust stratification, solves its dew point corrosion problem simultaneously, add the service life of heat exchanger tube and air preheater.
4, divide water cap because heat exchanger tube top is arranged with N-shaped, its side being positioned at heat exchanger tube inside shelters from inlet opening, makes to form equally distributed one deck flowing moisture film in the inside of heat exchanger tube into water, make the transmission of heat evenly.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the enlarged diagram that single heat exchanger tube top is provided with tank.
Fig. 3 is the overlooking of tank in the present invention
figure.
In figure: 1, heat exchanger tube; 2, tank; 3, water cap is divided; 4, inlet opening; 5, bore a hole.
Detailed description of the invention
As shown in Figure 1,
oneplant the air preheater of fluidized bed heat exchange, comprise heat exchanger tube 1, the inlet end of described heat exchanger tube 1 is laterally provided with the tank 2 for water storage, tank 2 is frame-type, the top of heat exchanger tube 1 is positioned at above tank 2 through being located at tank 2, junction, two ends is for being tightly connected, and heat exchange is carried out in the inside that high-temperature flue gas carries out heat exchanger tube from the top of heat exchanger tube 2; The heat exchanger tube sidewall being positioned at tank 2 inside is provided with multiple inlet opening 4, and the top of heat exchanger tube 1 is arranged with N-shaped and divides water cap 3, and its length being positioned at the side of heat exchanger tube 1 inwall is not less than the height of tank 2.
Recirculated water in tank 2 is managed by being entered in heat exchanger tube 1 by the inlet opening 4 being located at heat exchanger tube 1 upper portion side wall, and is evenly distributed on moisture film that its inwall form one deck flowing entering in heat exchanger tube 1 by point water cap 3 that is set in heat exchanger tube top.
Overlooking of tank as shown in Figure 3
figure, tank 2 is frame-type, which is provided with the perforation 5 matched with heat exchanger tube, and the quantity of perforation 5 is equal with the quantity of heat exchanger tube, and its junction, for being tightly connected, reducing the temperature of air or increases the humidity of air under the current in anti-water stopping trough 2.
By the feature that the heat transfer coefficient between gas-water-steel is large, the high-temperature flue gas heat just entered in heat exchanger tube passes to rapidly the flowing moisture film of heat exchanger tube inwall, flowing moisture film is at outer wall heat being delivered to heat exchanger tube, and the cold air entered sends into boiler after being heated when flowing through heat exchanger tube outer wall, reaches the object adding hot-air.Improve the whole equipment heat exchange efficiency of air preheater, and avoid dust heat exchanger tube inwall pile up and the heat exchanger tube that weares and teares, add the service life of heat exchanger tube and air preheater.
Above embodiment is not limited only to protection scope of the present invention, all modify based on basic thought of the present invention or change all belong to protection scope of the present invention.
Claims (4)
1. an air preheater for fluidized bed heat exchange, comprises heat exchanger tube, it is characterized in that: the inlet end of described heat exchanger tube is laterally provided with the tank for water storage, and described heat exchanger tube top is positioned at the top of tank liquid level through the perforation being located at tank bottom; The heat exchanger tube sidewall being positioned at tank inside is provided with multiple inlet opening.
2. the air preheater of fluidized bed heat exchange according to claim 1, is characterized in that: in order to the water using inlet opening to enter heat exchanger tube forms equally distributed moisture film at heat exchanger tube inwall, and the top of described heat exchanger tube is arranged with a point water cap.
3. the air preheater of fluidized bed heat exchange according to claim 1, is characterized in that: described tank is frame-type, and the top of described heat exchanger tube is positioned at above tank through tank, and described heat exchanger tube and tank junction are for being tightly connected.
4. the air preheater of fluidized bed heat exchange according to claim 2, is characterized in that: described point of water cap is the top that N-shaped is fastened in heat exchanger tube, and its length being positioned at the side of heat exchanger tube inwall is not less than the height of described tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510277437.4A CN104879773A (en) | 2015-05-27 | 2015-05-27 | Air preheater for heat exchange of flow layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510277437.4A CN104879773A (en) | 2015-05-27 | 2015-05-27 | Air preheater for heat exchange of flow layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104879773A true CN104879773A (en) | 2015-09-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510277437.4A Pending CN104879773A (en) | 2015-05-27 | 2015-05-27 | Air preheater for heat exchange of flow layer |
Country Status (1)
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| CN (1) | CN104879773A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351164A (en) * | 2020-04-30 | 2020-06-30 | 四川中邦模具有限公司 | Composite filter element with air humidifying, peculiar smell removing and purifying effects |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4116698B2 (en) * | 1998-06-30 | 2008-07-09 | 株式会社ニッショー機工 | Ash fusion incineration system |
| CN201680401U (en) * | 2010-04-23 | 2010-12-22 | 深圳中节能环保有限公司 | Forced circulation heat exchanging system |
| CN203364159U (en) * | 2013-06-04 | 2013-12-25 | 安徽节源节能科技有限公司 | Air preheater for heat exchange of flowing layer |
| CN105114975A (en) * | 2014-12-03 | 2015-12-02 | 芜湖三峰节能设备有限公司 | Air preheater for heat exchange of flowing layer |
-
2015
- 2015-05-27 CN CN201510277437.4A patent/CN104879773A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4116698B2 (en) * | 1998-06-30 | 2008-07-09 | 株式会社ニッショー機工 | Ash fusion incineration system |
| CN201680401U (en) * | 2010-04-23 | 2010-12-22 | 深圳中节能环保有限公司 | Forced circulation heat exchanging system |
| CN203364159U (en) * | 2013-06-04 | 2013-12-25 | 安徽节源节能科技有限公司 | Air preheater for heat exchange of flowing layer |
| CN105114975A (en) * | 2014-12-03 | 2015-12-02 | 芜湖三峰节能设备有限公司 | Air preheater for heat exchange of flowing layer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351164A (en) * | 2020-04-30 | 2020-06-30 | 四川中邦模具有限公司 | Composite filter element with air humidifying, peculiar smell removing and purifying effects |
| CN111351164B (en) * | 2020-04-30 | 2023-12-08 | 中邦(成都)电器有限公司 | Composite filter element with air humidifying, deodorizing and purifying effects |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Anhui section source energy saving Technology Co., Ltd. patent Manager Document name: Review of business letter |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150902 |
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| WD01 | Invention patent application deemed withdrawn after publication |