CN2310240Y - Phase exchange heating boiler - Google Patents
Phase exchange heating boiler Download PDFInfo
- Publication number
- CN2310240Y CN2310240Y CN 97216990 CN97216990U CN2310240Y CN 2310240 Y CN2310240 Y CN 2310240Y CN 97216990 CN97216990 CN 97216990 CN 97216990 U CN97216990 U CN 97216990U CN 2310240 Y CN2310240 Y CN 2310240Y
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- Prior art keywords
- boiler
- heat
- wall
- heat exchanger
- water
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- Expired - Fee Related
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Abstract
The utility model provides a phase change heat-exchanging heating boiler. A surface type heat exchanger is arranged on the position of a steam drum of a conventional boiler. The surface type heat exchanger, a drop pipe, a water cooling wall, a lower connecting box and a convection discharge pipe form an inner sealing circulation system of a working medium boiler of the phase change heat-exchanging heating boiler. Hot network water flows a heat-exchanging pipe bundle of the surface type heat exchanger to carry out heat exchange. The utility model has the advantages of simple equipment, no heating surface corrosion, little pollution, high heat efficiency, etc.
Description
The utility model relates to a kind of improvement of heating boiler, particularly relates to the improvement of phase-change heat-exchange heating boiler.
Existing heating boiler divides two big classes, and a class is a steam indirect heating boiler, and another kind of is warm water direct heating boiler.This two classes heating boiler all exists different disadvantages, influence heating benefit.
Steam indirect heating boiler produces steam and need send outside, through vapour～water, water～water heat-exchange system heat exchange, improve the heating water temperature, send boiler back to through the feed water system of boiler and chemical water treatment system again and heat once more and steam is condensed into condensate water, not only equipment is many, also will cause nearly 20% left and right sides heat loss.
Though Lukewarm water boiler direct heating equipment is simple, but the heat supply network recirculated water that contains impurity and air in a large number directly enters the boiler heating surface heating, scaling, ponding slag, oxide etch tube wall in heat pipe, at the depressed dew of pipe foreign cigarette, formation sulfurous acid corrosion tube wall and the stifled ash of dust, influence boiler and normally move, strengthen thermal resistance, influence is conducted heat, reduce the boiler output and the thermal efficiency, shorten boiler service life.
The purpose of this utility model is: a kind of phase-change heat-exchange heating boiler is provided, and this boiler heating equipment is simple, and the corrosion contamination of heating surface tube is few, thermal efficiency height.
The purpose of this utility model is realized by following technical proposals: heating boiler comprises burning chamber's exhanst gas outlet, convection section flue gas dividing plate, down-comer, lower collecting box, the front water wall that boiler foundation, burner, coal supply facility, furnace wall, rear arch, rear arch and back wall constitute; Side water wall, rear arched tube and convection calandria, the position of steam drum is provided with the surface-type heat exchanger that comprises heat-exchanging tube bundle on existing conventional boiler, surface-type heat exchanger and down-comer, front water wall, side water wall, rear arched tube, lower collecting box and convection calandria constitute the stove internal circulation system of heat absorption heat exchange of boiler working medium closed circulation and condensing heat-exchange.
In order to improve heat exchange efficiency, the pipe of the heat-exchanging tube bundle of surface-type heat exchanger is the thin-wall stainless steel and in the common copper pipe any of the spiral winding copper cash of pipe, outer wall of thin-wall stainless steel bellows, the built-in flow velocity fluid layer that makes water in the pipe speed change turbulent flow device of changing into the unsteady flow field.
This boiler working medium is evaporated in the boiler heating surface heat absorption with saturation state, change the vapour-liquid two-phase flow into by single-phase saturated solution, volume increases proportion and reduces, and rises to upper side formula heat exchanger and the mutual heat exchange of heat supply network recirculated water, improves the heat supply network water temperature, the boiler working medium that is condensed and loses the latent heat of vaporization, change single-phase saturated solution again into by the vapour-liquid two-phase flow, volume-diminished, proportion increases, naturally sink, enter the boiler heating surface heating once more through down-comer, lower collecting box.
The utility model advantage:
1. the boiler working medium of this utility model is transmitted in the heat process in pot, all be to absorb heat at boiler heating surface with the phase-change heat-exchange form in saturation state, condensation heat release in face formula heat exchanger, the fuel combustion liberated heat is transferred to heat supply network recirculated water, heat transfer coefficient is the highest, reduce heat exchange area, its heat exchange efficiency height, and save steel.Be difficult to make, consume the upper and lower steam drum of the high boiler of steel by the surface exchanger replacement, obviously reduce the boiler cost.
2. this utility model is transmitted heat by boiler working medium phase-change heat-exchange in pot, and boiler steams and do not send outside.Condensing heat-exchange sealing and circulating in pot is saved the outer steam heat-exchanging system of stove, the feed water system of boiler and chemical water treatment system, and the heat loss that produces in the outer heat transfer process of stove.
3. hot net water does not directly enter the boiler heating surface heating, avoids introduced contaminants and gas to bring in the pot, and scaling ponding slag oxidation corrosion tube wall also avoids smoke condensation to form sulfurous acid corrosion pipe outer wall, and the stifled ash of dust influences boiler and normally moves.Keep the boiler heating surface cleaning, favourable heat transfer, the favourable raising boiler output and the thermal efficiency, equipment is simple, and is easy to operate, safe and reliable.
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the vertical A-A profile of phase-change heat-exchange heating boiler.
Fig. 2 is phase-change heat-exchange heating boiler B-B section and C-C view profile.
This embodiment is a 1.4MW/h phase-change heat-exchange heating boiler, and referring to Fig. 1, Fig. 2, phase-change heat-exchange heating pot boiler is the same with other type boiler to be made up of stove and pot two major parts.
First is a stove: the burning chamber's exhanst gas outlet (14) that is made of the burner (3) of the boiler foundation with segmentation air distribution (1), horizontal backstepping reciprocal grate, coal supply facility (4), furnace wall (5), rear arch (12), rear arch and back wall, convection section flue gas dividing plate (18) etc. are formed burner hearth and flue gas circulation passage, and fuel combustion produces hot flue gas and boiler working medium is carried out heat exchange.
Second portion is a pot: surface-type heat exchanger (8), down-comer (6), lower collecting box (2), front water wall (7), side water wall (10), rear arched tube (12) and the convection calandria (16) etc. of forming heat-exchanging tube bundle by bellows are formed system in the pot of heat absorption heat exchange of boiler working medium closed circulation and condensing heat-exchange.As shown in Figure 1, convection calandria (16) and surface-type heat exchanger UNICOM mouth are located at an end of heat exchanger, and down-comer, water-cooling wall (7), (10), rear arched tube and surface-type heat exchanger UNICOM mouth are located at the other end of surface-type heat exchanger.Hot net water from one end to the other side flows through through heat-exchanging tube bundle, boiler produces steam and carries out heat exchange through surface exchanger and heat supply network recirculated water, improve the heat supply network water temperature, lose the latent heat of vaporization be condensed change single-phase saturated solution into boiler working medium through down-comer, lower collecting box, to each heating surface heat absorption evaporation, change the vapour-liquid two-phase flow again into by single-phase saturated solution and rise to surface exchanger and hot net water heat exchange, the heat that circulates and so forth fuel is produced in the burner hearth burning, be transferred to heat supply network recirculated water, realize heating.
For the normal safe operation of monitoring boiler also is provided with: water column Pressure gauge (9), vent valve (11), water supply valve (13), safety valve (15), pay steam valve (17), paying the steam valve effect is in order to pick out jet chimney, as boiler stand-by power vapour source, when the boiler room has a power failure suddenly, the heat supply network water pump is out of service, but furnace wall is still awfully hot, and burner hearth also has ember, boiler working medium will continue evaporation, boiler will play pressure, and safety door will move steam discharge decompression, and boiler is wanted dehydration for this reason, water level descends, for guaranteeing the pot ordinary water level, utilize the standby vapour of boiler source to be used as power just, start and pay hydrophone water filling in pot, guarantee boiler safety, prevent the heating surface overtemperature.
Claims (3)
1. phase-change heat-exchange heating boiler, comprise by having boiler foundation (1), burner (3), coal supply facility (4), furnace wall (5), rear arch (12), burning chamber's exhanst gas outlet (14) that rear arch and back wall constitute, convection section flue gas dividing plate (18), down-comer (6), lower collecting box (2), front water wall (7), side water wall (10), rear arched tube (12) and convection calandria (16), it is characterized in that: the position of steam drum is provided with the surface-type heat exchanger (8) that comprises heat-exchanging tube bundle, surface-type heat exchanger (8) and down-comer on existing conventional boiler, front water wall (7), side water wall (10), rear arched tube (12), lower collecting box (2) and convection calandria (16) constitute the stove internal circulation system of heat absorption heat exchange of boiler working medium closed circulation and condensing heat-exchange.
2. according to the described boiler of claim 1, it is characterized in that: the pipe of the heat-exchanging tube bundle of said surface-type heat exchanger is the thin-wall stainless steel bellows, the thin-wall stainless steel of the built-in spiral winding copper cash of pipe, outer wall that makes the speed change turbulent flow device that the flow velocity fluid layer of water in the pipe changes into the alternation flow field and among the common copper pipe any.
3. boiler according to claim 1 is characterized in that: be provided with on the top of surface-type heat exchanger and pay a steam valve (17), pipeline is arranged paying steam valve and the actuating section UNICOM that pays hydrophone that can water filling in stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97216990 CN2310240Y (en) | 1997-06-18 | 1997-06-18 | Phase exchange heating boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97216990 CN2310240Y (en) | 1997-06-18 | 1997-06-18 | Phase exchange heating boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2310240Y true CN2310240Y (en) | 1999-03-10 |
Family
ID=33933725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97216990 Expired - Fee Related CN2310240Y (en) | 1997-06-18 | 1997-06-18 | Phase exchange heating boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2310240Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355800A (en) * | 2017-07-14 | 2017-11-17 | 四川竹根锅炉股份有限公司 | A kind of ash-laden gas heat recovery boiler |
-
1997
- 1997-06-18 CN CN 97216990 patent/CN2310240Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355800A (en) * | 2017-07-14 | 2017-11-17 | 四川竹根锅炉股份有限公司 | A kind of ash-laden gas heat recovery boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |