CN204555321U - A kind of gradient freezing formula gas heating unit - Google Patents
A kind of gradient freezing formula gas heating unit Download PDFInfo
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- CN204555321U CN204555321U CN201520228937.4U CN201520228937U CN204555321U CN 204555321 U CN204555321 U CN 204555321U CN 201520228937 U CN201520228937 U CN 201520228937U CN 204555321 U CN204555321 U CN 204555321U
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- heat exchanger
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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Abstract
The utility model relates to a kind of gradient freezing formula gas heating unit, comprises body, high-efficiency heat exchanger, afterbody smoke box, base and connecting line.Described high-efficiency heat exchanger, is made up of shell, tube bank, square inner core, and in order to increase the heat transfer area of unit volume, tube bank adopts augmentation of heat transfer measure to be provided with helical fin in its outer surface increase.In order to make high-temperature flue gas fully contact with cryogenic flow physical efficiency, the design of square inner tube structure makes tube bank vertical with high-temperature flue gas direction and gradient array is arranged, and make to pass through between shell and square inner core to restrain the direct current channel forming cryogen.Tube bank is arranged in inverse cross-current configuration with high-temperature flue gas spray from body outlet flue, adds and restrains the interior holdup time of cryogen between high-temperature flue gas, makes exhaust gas temperature can lower than 70 DEG C.The utility model has that structure is simple, cost is low, security of operation, energy-conserving and environment-protective feature, realize gradient freezing heat exchange by high-efficiency heat exchanger, effectively reclaimed sensible heat and the latent heat of vaporization in smoke evacuation, improve the thermal efficiency.
Description
Technical field:
The present invention relates to a kind of novel gas thermal power plant unit, a kind of gradient freezing formula gas heating unit, belongs to building trade heat supply heating technical field specifically.
Background technology
In general, the design principle of condensing waste heat recovery boiler is mainly two aspects: (1) reduces exhaust gas temperature, makes flue gas reach dew-point temperature, forms condensed water, discharges the latent heat of vaporization; (2) effectively absorb the waste heat in flue gas, reduce sensible heat loss.When flue gas is cooled to dew point, the steam in flue gas just starts condensation, precipitation.Flue gas dew point depends primarily on the partial pressure of steam in flue gas, and the partial pressure of steam raises, and dew point raises, and vice versa.When flue-gas temperature is lower than dew point, steam just starts partial condensation, due to the condensation of steam, steam partial pressure reduces, and corresponding dew point also reduces, until it reduces to identical with flue-gas temperature, now reach a new saturated steam poised state, condensation stops.Therefore, when cigarette temperature is lower than dew point, just a part of water vapor condensation.And flue gas dew point is also relevant with the composition of combustion gas and the excess air coefficient of burning etc.
General gas boiler is by the restriction of heat exchanger structure, and exhaust gas temperature is higher, and far above flue gas dew point, the latent heat of vaporization cannot utilize.And condensing waste heat recovery boiler makes exhaust gas temperature reduce by increase condensing heat exchanger, measure such as change heat exchange mode and structure etc., fully can not only absorb the sensible heat of flue gas, the latent heat of vaporization of part steam in flue gas can also be utilized, 5% ~ 10% is improved than the thermal efficiency of general gas boiler, if calculate with natural gas low heat value, then the thermal efficiency of condensing waste heat recovery boiler can meet or exceed 100%.At present, condensing waste heat recovery boiler popular on market is structurally all provided with high-efficiency condensation heat exchanger and air preheater, be used for sensible heat in the smoke evacuation of absorption boiler afterbody and the latent heat that discharges of water vapor condensation, certainly will cause the complexity of the huge of system and device structure like this, construction costs is also very high.
Summary of the invention
For above-mentioned the deficiencies in the prior art, propose and disclose a kind of gradient freezing formula gas heating unit, be that one does not arrange special-purpose air preheater and condensing heat exchanger specifically, adopt gas-water against the gradient freezing formula atmospheric hot-water gas heating unit of cross-flow heat exchange form.
Technical scheme of the present invention is as follows:
A kind of gradient freezing formula gas heating unit, comprise body (1), high-efficiency heat exchanger (2), afterbody smoke box (3), base (4) and connecting line (5), it is characterized in that described body (1) is vertical structure, described high-efficiency heat exchanger (2) is connected with body (1) and afterbody smoke box (3) respectively by two square shaped flanges, and described base (4) is connected with body (1) and high-efficiency heat exchanger (2) with bolt connecting mode respectively by welding; Described high-efficiency heat exchanger (2) is made up of shell (2-1), tube bank (2-2), square inner core (2-3), and the tube bank 2-1 outer surface of described high-efficiency heat exchanger 2 is provided with helical fin; The both sides tube sheet of described square inner core (2-3) is provided with the trapezoidal array hole bundle of stagger arrangement, square inner core (2-3) two ends are welded with the square flange for connecting body (1) and afterbody smoke box (4); The plate hole bundle welding forming of described tube bank (2-2) and the trapezoidal arranged in arrays in square inner core (2-3) both sides, tube bank (2-2) is laterally arranged vertically with body (1) outlet flue, and forming with the flue gas in body (1) discharge horizontal direction is cross-current configuration; Described shell (2-1) is arranged on square inner core (2-3) outside by narrow L-type steel plate and forms fluid interlayer, makes tube bank (2-2) endoporus and fluid interlayer form cry-fluid passage.
Described body (1) is provided with atmospheric communicating pipe, combustor interface and thermal power plant unit cryogenic fluid outlet, high-efficiency heat exchanger (2) two ends are provided with square flange, and body (1) outlet flue and afterbody smoke box (3) enter mouth and be respectively arranged with square flange.High-efficiency heat exchanger (2) is connected with body (1) and afterbody smoke box (3) respectively by two square shaped flanges, and base (4) is connected with body (1) and high-efficiency heat exchanger (2) with bolt connecting mode respectively by welding.
Described connecting line (5) connects body (1) and the waterway channel of high-efficiency heat exchanger (2), thermal power plant unit cryogen gateway and atmospheric communicating pipe.Body (1) is arranged on high-performance heat exchanger (2) bottom near body with the cry-fluid passage connecting line (5) of high-efficiency heat exchanger (2), thermal power plant unit cry-fluid inlet is arranged on high-efficiency heat exchanger (2) bottom near afterbody smoke box (3) one end, thermal power plant unit cryogenic fluid outlet is arranged on the top right side portion of body (1), and atmospheric communicating pipe is arranged on the top of body (1).
In order to make flue gas can with it cross-flow arrange tube bank (2-2) in fluid heat transfer ability stronger, cry-fluid inlet is arranged on below the afterbody of the high-efficiency heat exchanger (2) of afterbody smoke box (3) one end, the gradient freezing heat exchange mode of inverse cross-flow is formed with high-temperature flue gas, can sensible heat in more effective recovery tail gas smoke evacuation and the latent heat of vaporization.
In order to increase the heat transfer area of unit volume, tube bank (2-2) adopts augmentation of heat transfer measure to be provided with helical fin in its outer surface increase.Fully contact with cryogenic flow physical efficiency to make high-temperature flue gas, square inner core (2-1) structural design make tube bank (2-2) vertical with high-temperature flue gas direction and gradient array is arranged, and make between shell (2-3) and square inner core (2-1) by restraining the direct current channel that (2-2) forms cryogen, make high-temperature flue gas and cryogen add time of contact, make exhaust gas temperature lower.Tube bank (2-2) is arranged in inverse cross-current configuration with the high-temperature flue gas sprayed from body (1) outlet flue, add the holdup time of tube bank (2-2) interior cryogen between high-temperature flue gas, make exhaust gas temperature can lower than 70 DEG C, the narrow L-type aquaporin of shell (2-3) makes cryogen flow velocity faster, effectively reclaim sensible heat and the latent heat of vaporization in smoke evacuation, thus substantially increase heat exchange efficiency.
Adopt technical scheme provided by the present invention, obtainable beneficial effect is: (1) the present invention adopts augmentation of heat transfer measure to be provided with helical fin at tube bank outer surface, makes heat exchange area add more than 7 times in effective space; (2) structure of the present invention is simple, can select existing metal material and spare part in common use, and adopts conventional processes to make, and easily implements; (3) the present invention adopts tube bank to arrange in inverse cross-current configuration with high-temperature flue gas in structural design, and add the holdup time of cryogen between high-temperature flue gas in tube bank, unit exhaust gas temperature can lower than 70 DEG C; (4) the present invention have that structure is simple, cost is low, security of operation, energy-conserving and environment-protective feature, realize gradient freezing heat exchange by high-efficiency heat exchanger, effectively reclaimed sensible heat and the latent heat of vaporization in smoke evacuation, improve the thermal efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure: 1, body, 2, high-efficiency heat exchanger, 2-1, shell, 2-2, tube bank, 2-3, square inner core, 3, afterbody smoke box, 4, base, 5, connecting line.
Detailed description of the invention
Below in conjunction with accompanying drawing 1, the present invention is further described, and elaborate specific implementation method.
A kind of gradient freezing formula gas heating unit, comprises body (1), high-efficiency heat exchanger (2), afterbody smoke box (3), base (4) and connecting line (5).
High-efficiency heat exchanger (2) is by shell (2-1), tube bank (2-2), square inner core (2-3) forms, the both sides tube sheet of square inner core (2-3) is provided with the trapezoidal array hole bundle of stagger arrangement, two ends are welded with the square flange for connecting body (1) and afterbody smoke box (4), the plate hole bundle welding forming of tube bank (2-2) and the trapezoidal arranged in arrays in square inner core (2-3) both sides, tube bank (2-2) is laterally arranged vertically with body (1) outlet flue, forming with the flue gas in body (1) discharge horizontal direction is cross-current configuration.Shell (2-1) is arranged on square inner core (2-3) outside by narrow L-type steel plate and forms fluid interlayer, makes tube bank (2-2) endoporus and fluid interlayer form cry-fluid passage.
Body (1) is provided with atmospheric communicating pipe, combustor interface and thermal power plant unit cryogenic fluid outlet, high-efficiency heat exchanger (2) two ends are provided with square flange, and body (1) outlet flue and afterbody smoke box (3) enter mouth and be respectively arranged with square flange.High-efficiency heat exchanger (2) is connected with body (1) and afterbody smoke box (3) respectively by two square shaped flanges, and base (4) is connected with body (1) and high-efficiency heat exchanger (2) with bolt connecting mode respectively by welding.
Connecting line (5) connects body (1) and the waterway channel of high-efficiency heat exchanger (2), thermal power plant unit cryogen gateway and atmospheric communicating pipe.Body (1) is arranged on high-performance heat exchanger (2) bottom near body with the cry-fluid passage connecting line (5) of high-efficiency heat exchanger (2), thermal power plant unit cry-fluid inlet is arranged on high-efficiency heat exchanger (2) bottom near afterbody smoke box (3) one end, thermal power plant unit cryogenic fluid outlet is arranged on the top right side portion of body (1), and atmospheric communicating pipe is arranged on the top of body (1).
In order to make flue gas can with it cross-flow arrange tube bank (2-2) in fluid heat transfer ability stronger, cry-fluid inlet is arranged on below the afterbody of the high-efficiency heat exchanger (2) of afterbody smoke box (3) one end, the gradient freezing heat exchange mode of inverse cross-flow is formed with high-temperature flue gas, can sensible heat in more effective recovery tail gas smoke evacuation and the latent heat of vaporization.
Claims (2)
1. a gradient freezing formula gas heating unit, comprise body (1), high-efficiency heat exchanger (2), afterbody smoke box (3), base (4) and connecting line (5), it is characterized in that described body (1) is vertical structure, described high-efficiency heat exchanger (2) is connected with body (1) and afterbody smoke box (3) respectively by two square shaped flanges, and described base (4) is connected with body (1) and high-efficiency heat exchanger (2) with bolt connecting mode respectively by welding; Described high-efficiency heat exchanger (2) is made up of shell (2-1), tube bank (2-2), square inner core (2-3), and the tube bank 2-1 outer surface of described high-efficiency heat exchanger 2 is provided with helical fin; The both sides tube sheet of described square inner core (2-3) is provided with the trapezoidal array hole bundle of stagger arrangement, square inner core (2-3) two ends are welded with the square flange for connecting body (1) and afterbody smoke box (4); The plate hole bundle welding forming of described tube bank (2-2) and the trapezoidal arranged in arrays in square inner core (2-3) both sides, tube bank (2-2) is laterally arranged vertically with body (1) outlet flue, and forming with the flue gas in body (1) discharge horizontal direction is cross-current configuration; Described shell (2-1) is arranged on square inner core (2-3) outside by narrow L-type steel plate and forms fluid interlayer, makes tube bank (2-2) endoporus and fluid interlayer form cry-fluid passage.
2. a kind of gradient freezing formula gas heating unit according to claim 1, it is characterized in that described cry-fluid inlet is arranged on below the afterbody of the high-efficiency heat exchanger (2) of afterbody smoke box (3) one end, form the gradient freezing heat exchange of inverse cross-flow with high-temperature flue gas.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520228937.4U CN204555321U (en) | 2015-04-15 | 2015-04-15 | A kind of gradient freezing formula gas heating unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520228937.4U CN204555321U (en) | 2015-04-15 | 2015-04-15 | A kind of gradient freezing formula gas heating unit |
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| CN204555321U true CN204555321U (en) | 2015-08-12 |
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| CN201520228937.4U Active CN204555321U (en) | 2015-04-15 | 2015-04-15 | A kind of gradient freezing formula gas heating unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106152517A (en) * | 2015-04-15 | 2016-11-23 | 上海华恩利热能机器股份有限公司 | A kind of gradient freezing formula gas heating unit |
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- 2015-04-15 CN CN201520228937.4U patent/CN204555321U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106152517A (en) * | 2015-04-15 | 2016-11-23 | 上海华恩利热能机器股份有限公司 | A kind of gradient freezing formula gas heating unit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 20, Lane 3581, Shanghai Qingpu District, 201700 Patentee after: Shanghai Hua-enly Heat Energy Machine Co., Ltd. Address before: 2/F, 47 Zhengyi Road, Yangpu District, Shanghai, 2003 Patentee before: Shanghai Hua-enly Heat Energy Machine Co., Ltd. |
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| CP02 | Change in the address of a patent holder |