CN203810379U - Boiler waste heat recovery system - Google Patents
Boiler waste heat recovery system Download PDFInfo
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- CN203810379U CN203810379U CN201420224725.4U CN201420224725U CN203810379U CN 203810379 U CN203810379 U CN 203810379U CN 201420224725 U CN201420224725 U CN 201420224725U CN 203810379 U CN203810379 U CN 203810379U
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- economizer
- boiler
- energy saving
- recovery system
- saving optimizing
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Abstract
The utility model provides a boiler waste heat recovery system which comprises a boiler coal economizer, an air preheater, a tail flue connected between the boiler coal economizer and the air preheater, and an energy-saving optimized coal economizer. The boiler coal economizer comprises a water supply inlet header, the energy-saving optimized coal economizer comprises a pipe bundle, a water supply inlet header and a water supply outlet header, the water supply inlet header and the water supply outlet header are arranged at two ends of the pipe bundle, a bypass is arranged on the tail flue, the energy-saving optimized coal economizer is fixed in the bypass, and the water supply outlet header of the energy-saving optimized coal economizer is connected with the water supply inlet header of the boiler coal economizer. By the boiler waste head recovery system, smoke discharging temperature of a boiler can be lowered, and heat circulating efficiency of a power plant is improved; the boiler waste head recovery system still has high reliability and economical performance when working conditions of the boiler are changed greatly.
Description
Technical field
The utility model relates to boiler afterheat recovery technology field, particularly a kind of boiler waste heat recovery system that increases energy saving optimizing economizer.
Background technology
At boiler afterheat, reclaim field, economizer is the equipment that utilizes the heat heated feed water of boiler tail flue gas.Its Main Function has two:
One, reduce exhaust gas temperature, improve the thermal efficiency, save fuel.
Two, improve feed temperature, reduce the thermal stress of the boiler barrel that causes because of the temperature difference, extend the service life of drum.
To be the heat that utilizes flue gas in back-end ductwork will enter before boiler air preheat to the heating surface of uniform temperature with air preheater.Air preheater can reduce heat loss due to exhaust gas, improves the stability of coal dust firing and the carbon burnout rate of coal dust in boiler, falls low-energy-consumption.
But the heat that passes to economizer due to flue gas is subject to the heating surface area of economizer, the impact of the factors such as flow velocity of flue gas.The flue-gas temperature of economizer exit almost with the flue-gas temperature relation in direct ratio of economizer entrance, if the flue-gas temperature of economizer entrance surpasses design load, the flue-gas temperature of economizer exit also can surpass design load so.Similarly, the flue-gas temperature of air preheater entrance and exit also can surpass design load, and the result causing is that flue gas is taken away more heat, and heat loss due to exhaust gas increases.
Visible, if exist chamber design deviation or design coal different with Actual combustion coal, will cause exhaust gas temperature too high, flue gas carries more unnecessary heat, flue gas loss increases.
Summary of the invention
The purpose of this utility model is to provide a kind of boiler waste heat recovery system, to solve because of chamber design deviation or design coal cause exhaust gas temperature too high problems different from Actual combustion coal.
In order to address the above problem, the utility model provides a kind of boiler waste heat recovery system, and its technical scheme is as follows:
A boiler waste heat recovery system, comprising: boiler economizer, air preheater and be connected in the back-end ductwork between described boiler economizer, air preheater, and described boiler economizer comprises feed-water intake header; Wherein, also comprise: energy saving optimizing economizer, comprises feed-water intake header, the feedwater outlet header of restraining and being located at described tube bank two ends; Described back-end ductwork is provided with a bypass, and described energy saving optimizing economizer is fixed in described bypass, and the feedwater outlet header of described energy saving optimizing economizer and the feed-water intake header of described boiler economizer are connected.
In a kind of preferred embodiment of above-mentioned boiler waste heat recovery system, also comprise: gas baffle, be located at rotationally in described back-end ductwork, flue gas in described back-end ductwork is divided into two parts and guides a wherein part to input to described energy saving optimizing economizer, to regulate the exhaust gas volumn that enters described energy saving optimizing economizer.
In a kind of preferred embodiment of above-mentioned boiler waste heat recovery system, described gas baffle is positioned at described energy saving optimizing economizer near a side of described back-end ductwork.
In a kind of preferred embodiment of above-mentioned boiler waste heat recovery system, the top view of described gas baffle is V-shaped, and top edge extends to described boiler economizer direction, and lower limb extends to described air preheater, middle turning point is provided with rotating shaft, to realize the rotatable design of described gas baffle.
In a kind of preferred embodiment of above-mentioned boiler waste heat recovery system, the middle part of the corresponding and close described energy saving optimizing economizer of described rotating shaft.
In a kind of preferred embodiment of above-mentioned boiler waste heat recovery system, the tube bank of described energy saving optimizing economizer is provided with fin, to increase heat exchange area.
Analyze knownly, the utility model can reduce exhaust gas temperature, improves power plant thermal efficiency of cycle, when larger change occurs boiler working condition, still has higher reliability and economy.
Accompanying drawing explanation
Fig. 1 is the theory structure schematic diagram of the utility model preferred embodiment.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further details.
As shown in Figure 1, preferred embodiment of the present utility model mainly comprises back-end ductwork 1, boiler economizer 2, air preheater 3, energy saving optimizing economizer 4, bypass 5, gas baffle 6 etc.Boiler economizer 2 comprises feed-water intake header 21, and energy saving optimizing economizer 4 comprises tube bank (not shown), feed-water intake header 41, feedwater outlet header 42.
Particularly, back-end ductwork 1 is connected between boiler economizer 2, air preheater 3, the flue gas 10 that arrow represents is in back-end ductwork 1, a part enters energy saving optimizing economizer 4 from boiler economizer 2, by energy saving optimizing economizer 4, enter air preheater 3 again, another part directly enters air preheater 3 by boiler economizer 2.Bypass 5 is for protruding from the cavity body structure of back-end ductwork 1, be located at a side of back-end ductwork 1, energy saving optimizing economizer 4 can be supported and is fixed in bypass 5 by steelframe, and the feedwater outlet header 42 of energy saving optimizing economizer 4 is connected with the feed-water intake header 21 of boiler economizer 2.
In order to regulate the amount that enters the flue gas 10 of energy saving optimizing economizer 4 from back-end ductwork 1, this preferred embodiment is provided with gas baffle 6, it is located in back-end ductwork 1 rotationally, by the flue gas in back-end ductwork 1 10 be divided into two parts mandatory guidance wherein a part input to energy saving optimizing economizer 4, another part enters air preheater 3.
Preferably, as Fig. 1, gas baffle 6 is positioned at energy saving optimizing economizer 4 near a side of back-end ductwork 1.And its top view is V-shaped, top edge 62 extends to boiler economizer 2 directions, and lower limb 63 extends to air preheater 3, and middle turning point is provided with rotating rotating shaft 61, adjustable to realize the aperture of gas baffle 6.Certainly top edge 62 and lower limb 63 can be both independent adjustment separately, also can be synchronous adjustment, such as flue gas overtemperature is when higher, angle between upper and lower two edges reduces, that is to say that the flue gas of overhead gage top enters the amount increase of energy saving optimizing economizer, the exhaust gas volumn of the outflow energy saving optimizing economizer of lower baffle plate below also increases simultaneously.
More preferably, the middle part of rotating shaft 61 corresponding and close energy saving optimizing economizers 4.
When the cigarette temperature of boiler economizer 2 outlets surpasses design load, open gas baffle 6, according to cigarette temperature height, determine the aperture and the feed temperature that enters the feed-water intake header 41 of energy saving optimizing economizer 4 of gas baffle 6.If it is more that the flue-gas temperature of boiler economizer 2 outlets surpasses design load, the aperture of gas baffle 6 just tunes up so, the exhaust gas volumn that enters like this energy saving optimizing economizer 4 increases, feedwater in energy saving optimizing economizer 4 enters the feed-water intake header 21 of boiler economizer 2 again after can being first heated, so enter the flue-gas temperature of air preheater 3, reduce.Because the heating heating surface of boiler feedwater has increased energy saving optimizing economizer 4, thereby can suitably reduce through the temperature of the feedwater of too high adding (high-pressure heater), so just save height and added and draw gas, reduce coal consumption.
Visible, this preferred embodiment can utilize too high flue-gas temperature to save high adding and draw gas, energy-saving and cost-reducing.
In addition, the tube bank of energy saving optimizing economizer 4 is provided with fin (not shown), and carries out modification, forms finned modification pipe.Finned modification pipe is that the outer surface at light pipe arranges fin, can increase heat exchange area, dwindles the volume of energy saving optimizing economizer 4, reduces to take up room.This fin is cooked to anticorrosion and anti-wear processing simultaneously, strengthen its service life.
To sum up, the utility model separately arranges an energy saving optimizing economizer and is arranged on the back-end ductwork between boiler economizer and air preheater, utilize the heat heated feed water of high smoke temperature design load, according to the how many feed temperatures that enter this energy saving optimizing economizer of controlling of the overtemperature of overtemperature flue gas.Whereby, the utility model can reduce exhaust gas temperature, improves power plant thermal efficiency of cycle, when larger change occurs boiler working condition, still has higher reliability and economy.
As known by the technical knowledge, the utility model can be realized by other the embodiment that does not depart from its Spirit Essence or essential feature.Therefore, above-mentioned disclosed embodiment, with regard to each side, all just illustrates, and is not only.All changes within the scope of the utility model or within being equal to scope of the present utility model are all included in the utility model.
Claims (6)
1. a boiler waste heat recovery system, comprising: boiler economizer, air preheater and be connected in the back-end ductwork between described boiler economizer, air preheater, and described boiler economizer comprises feed-water intake header; It is characterized in that, also comprise: energy saving optimizing economizer, comprises feed-water intake header, the feedwater outlet header of restraining and being located at described tube bank two ends; Described back-end ductwork is provided with a bypass, and described energy saving optimizing economizer is fixed in described bypass, and the feedwater outlet header of described energy saving optimizing economizer and the feed-water intake header of described boiler economizer are connected.
2. boiler waste heat recovery system according to claim 1, it is characterized in that, also comprise: gas baffle, be located at rotationally in described back-end ductwork, flue gas in described back-end ductwork is divided into two parts and guides a wherein part to input to described energy saving optimizing economizer, to regulate the exhaust gas volumn that enters described energy saving optimizing economizer.
3. boiler waste heat recovery system according to claim 2, is characterized in that, described gas baffle is positioned at described energy saving optimizing economizer near a side of described back-end ductwork.
4. according to the boiler waste heat recovery system described in claim 2 or 3, it is characterized in that, the top view of described gas baffle is V-shaped, top edge extends to described boiler economizer direction, lower limb extends to described air preheater, middle turning point is provided with rotating shaft, to realize the rotatable design of described gas baffle.
5. boiler waste heat recovery system according to claim 4, is characterized in that, the middle part of the corresponding and close described energy saving optimizing economizer of described rotating shaft.
6. boiler waste heat recovery system according to claim 1, is characterized in that, the tube bank of described energy saving optimizing economizer is provided with fin, to increase heat exchange area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420224725.4U CN203810379U (en) | 2014-05-04 | 2014-05-04 | Boiler waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420224725.4U CN203810379U (en) | 2014-05-04 | 2014-05-04 | Boiler waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203810379U true CN203810379U (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420224725.4U Expired - Fee Related CN203810379U (en) | 2014-05-04 | 2014-05-04 | Boiler waste heat recovery system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953914A (en) * | 2014-05-04 | 2014-07-30 | 国电龙源节能技术有限公司 | Boiler afterheat recovery system |
| CN107619310A (en) * | 2017-09-08 | 2018-01-23 | 国电龙源电力技术工程有限责任公司 | The system and method that Coastal Power Station warm water discharge recycles |
-
2014
- 2014-05-04 CN CN201420224725.4U patent/CN203810379U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953914A (en) * | 2014-05-04 | 2014-07-30 | 国电龙源节能技术有限公司 | Boiler afterheat recovery system |
| CN103953914B (en) * | 2014-05-04 | 2016-04-06 | 国电龙源节能技术有限公司 | Boiler waste heat recovery system |
| CN107619310A (en) * | 2017-09-08 | 2018-01-23 | 国电龙源电力技术工程有限责任公司 | The system and method that Coastal Power Station warm water discharge recycles |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 |