CN200968618Y - Boiler low pressure coal economizer - Google Patents
Boiler low pressure coal economizer Download PDFInfo
- Publication number
- CN200968618Y CN200968618Y CNU2006200885947U CN200620088594U CN200968618Y CN 200968618 Y CN200968618 Y CN 200968618Y CN U2006200885947 U CNU2006200885947 U CN U2006200885947U CN 200620088594 U CN200620088594 U CN 200620088594U CN 200968618 Y CN200968618 Y CN 200968618Y
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- Prior art keywords
- heat
- low
- temperature
- inlet
- trunk
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model relates to a low pressure coal saving device of boiling oven, which consists a heat pipe bundle, an inlet assembling trunk and an outlet assembling trunk. The two end of the heat pipe bundle connects separately to the inlet assembling trunk and the outlet assembling trunk. the inlet assembling trunk connects with the heater of a low pressure heat feedback system through a pipe. the outlet assembling trunk connects to a deoxidizing device through a pipe. The utility model adopts the structure of wing type property altered pipe bundle and alterable water supply system, there for can arrange more heat transfer area in a finite space, and efficiently recycle the heat power in the smoke, which make the device more economical. The inlet water supply can be altered as the temperature of the emitted smoke varies to adjust the pipe bundle wall temperature of the coal saving device, so that the low temperature rotting and ash blocking can be prevented. There for when the temperature of emitted smoke varies rapidly caused by the variation of boiler load and material category, relatively high heat transfer efficiency, reliability and the relatively high remaining heating recycling ratio under various working conditions can be guaranteed.
Description
Technical field
The utility model relates to a kind of boiler afterheat and reclaims energy-saving equipment, particularly a kind of low-pressure coal saver that can reduce all kinds of station boiler exhaust gas temperatures.
Background technology
We know that present many boilers because a variety of causes such as the variation of burning coal, load variations, combustion system change, heating surface change etc., causes the off-design operating mode, make exhaust gas temperature off-design value to raise about 20～50 ℃ in running.Have a strong impact on the cycle efficieny in boiler efficiency and power plant like this, increased the coal consumption of boiler.The present method that solves the exhaust gas temperature rising has a variety of, can adopt the heating surface that strengthens high-pressure economizer, the measures such as heating surface that strengthen air preheater, and still, these measures often are subjected to technical or structural restriction.Strengthen the heating surface of high-pressure economizer, must cause exporting water temperature and raise, limiting value is exactly the saturation temperature in the boiler-steam dome, also is subjected to the restriction of installing space simultaneously.Strengthen the heating surface area of air preheater, must cause the rising of hot blast temperature, also be subjected to the restriction of installing space and metal heatproof intensity.
Summary of the invention
The utility model provides a kind of low-pressure coal saver that can be installed in boiler tail for overcoming above-mentioned the deficiencies in the prior art, with the heat energy of recovery boiler flue gas, reduces the exhaust gas temperature of boiler, improves the cycle efficieny in power plant.
The purpose of this utility model is to adopt following technical proposals to realize: a kind of low-pressure coal saver for boiler, comprise heat-exchanging tube bundle, inlet header case and outlet collection case, the heat-exchanging tube bundle two ends connect inlet header case and outlet collection case respectively, the inlet header case is connected by the heater of pipeline with the low pressure heat regenerative system, and outlet collection case connects oxygen-eliminating device by pipeline.
Described heat-exchanging tube bundle is spiral fin coil or longitudinal finned tube, and pipe parent tube and fin surface are done modification and handled, and resistance to wears and corrosion resistant ability to have.
Be provided with high temperature transfer valve and low temperature switching valve in described inlet header case and the pipeline that low-pressure heater is connected.
The flue gas that comes out from air preheater enters low-pressure coal saver, the heat release of outside heat exchanger tube, flowing, and the temperature of flue gas is minimized, and enters the deduster of boiler behind the outflow economizer.The condensate water that comes from low-pressure heater flows in the economizer tube, behind the heat of absorption flue gas, flows out economizer and enters oxygen-eliminating device.The utility model has adopted finned modification pipe Pipe bundle structure, and therefore the system at changeable water inlet water source can arrange more heat exchange area in limited space, reclaim the heat energy of flue gas effectively, has improved the economy of equipment.When exhaust gas temperature changes, can adjust the wall temperature of economizer tube bank, avoid taking place cold end corrosion and clogging phenomenon, improve the reliability of equipment by switching the water inlet water source.When therefore the exhaust gas temperature that causes in boiler load change, fuel band variation etc. takes place to change greatly, also can guarantee higher heat transfer efficiency, higher reliability guarantees to have higher waste heat recovery effect under various operating modes.
Description of drawings
Fig. 1 is the utility model system principle schematic diagram;
Fig. 2 is a structural representation of the present utility model;
1. heat-exchanging tube bundles among the figure, 2. the inlet header case 3. exports the collection case, and 4. the high temperature transfer valve 5. hangs down temperature switching valve.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
Embodiment: as shown in Figure 1 and Figure 2, heat-exchanging tube bundle 1 two ends connect inlet header case 2 and outlet collection case 4 respectively, and inlet header case 2 is connected by the heater of pipeline with the low pressure heat regenerative system, and outlet collection case 3 connects oxygen-eliminating device by pipeline.
Heat-exchanging tube bundle 1 is spiral fin coil or longitudinal finned tube, and pipe parent tube and fin surface are done modification and handled, and resistance to wears and corrosion resistant ability to have.
Be provided with high temperature transfer valve 4 and low temperature switching valve 5 in inlet header case 2 and the pipeline that low-pressure heater is connected.
During work, the pipe space outerpace that the flue gas that flows out from air preheater enters heat-exchanging tube bundle 1 flows, and emits heat, makes the temperature of flue gas reduce.Condensate water is drawn from the outlet of #1 low-pressure heater, enters the inlet header case 2 of low-pressure coal saver, and then flows into the pipe inner flow passage of heat-exchanging tube bundle 1, absorbs the flue gas liberated heat, flows out heat-exchanging tube bundle 1 and enters outlet collection case 3, flows into oxygen-eliminating device again.When the flue-gas temperature that boiler air preheater comes out was on the low side, then condensate water should switch to #2 low-pressure heater outlet and draws.Height according to flue-gas temperature, under normal condition, the condensate water that enters this low-pressure coal saver can be drawn from the outlet of #1 low-pressure heater, and condensate water is drawn from the outlet of #2 low-pressure heater when flue-gas temperature is on the low side, also can draw from these two heater outlets simultaneously.During actual motion, can optimize the ratio of two strands of water.This low-pressure coal saver is arranged in the later back-end ductwork of air preheater, can adjust wall temperature, is suitable for the bigger occasion of power condition changing, the energy recovery rate height.
Claims (3)
1. low-pressure coal saver for boiler, comprise heat-exchanging tube bundle, inlet header case and outlet collection case, it is characterized in that: the heat-exchanging tube bundle two ends connect inlet header case and outlet collection case respectively, and the inlet header case is connected by the heater of pipeline with the low pressure heat regenerative system, and outlet collection case connects oxygen-eliminating device by pipeline.
2. low-pressure coal saver for boiler according to claim 1 is characterized in that: described heat-exchanging tube bundle is spiral fin coil or longitudinal finned tube, and pipe parent tube and fin surface are done modification and handled.
3. low-pressure coal saver for boiler according to claim 1 is characterized in that: be provided with high temperature transfer valve and low temperature switching valve in described inlet header case and the pipeline that low-pressure heater is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200885947U CN200968618Y (en) | 2006-09-05 | 2006-09-05 | Boiler low pressure coal economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200885947U CN200968618Y (en) | 2006-09-05 | 2006-09-05 | Boiler low pressure coal economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200968618Y true CN200968618Y (en) | 2007-10-31 |
Family
ID=38968188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200885947U Expired - Lifetime CN200968618Y (en) | 2006-09-05 | 2006-09-05 | Boiler low pressure coal economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200968618Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937295A (en) * | 2012-11-20 | 2013-02-20 | 上海锅炉厂有限公司 | Boiler economizer arrangement form suitable for denitration device negative whole process load operation |
| CN104019456A (en) * | 2013-03-01 | 2014-09-03 | 酒泉市爱华洁能环保有限公司 | Two-level cooling processing system |
-
2006
- 2006-09-05 CN CNU2006200885947U patent/CN200968618Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937295A (en) * | 2012-11-20 | 2013-02-20 | 上海锅炉厂有限公司 | Boiler economizer arrangement form suitable for denitration device negative whole process load operation |
| CN102937295B (en) * | 2012-11-20 | 2015-02-18 | 上海锅炉厂有限公司 | Boiler economizer arrangement form suitable for denitration device negative whole process load operation |
| CN104019456A (en) * | 2013-03-01 | 2014-09-03 | 酒泉市爱华洁能环保有限公司 | Two-level cooling processing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071031 |
|
| EXPY | Termination of patent right or utility model |