CN204240340U - Regulate the middle temperature flue gas recirculation device of steam temperature - Google Patents
Regulate the middle temperature flue gas recirculation device of steam temperature Download PDFInfo
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- CN204240340U CN204240340U CN201420729197.8U CN201420729197U CN204240340U CN 204240340 U CN204240340 U CN 204240340U CN 201420729197 U CN201420729197 U CN 201420729197U CN 204240340 U CN204240340 U CN 204240340U
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- cigarette
- moderate oven
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- flue gas
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Abstract
Regulate the middle temperature flue gas recirculation device of steam temperature.For the double reheat boiler matched with unit, reheater heating surface heat absorption ratio increases, superheater surface heat absorption ratio reduces, adopt the scheme of conventional single reheat boiler cannot meet the requirement of reheater system caloric receptivity, need a kind of method finding applicable double reheat boiler reheater vapor (steam) temperature to regulate, ensure that double reheat pot stably runs.A kind of middle temperature flue gas recirculation system regulating steam temperature, its composition comprises: moderate oven cigarette extracts flue (1), moderate oven cigarette extracts flue and is connected with boiler economizer exhaust pass (7), moderate oven cigarette mixing flue (2) respectively, moderate oven cigarette mixing flue is connected with stove cigarette recirculation blower gas approach (3), stove cigarette recirculation blower gas approach is connected with stove cigarette recirculation blower (4), and stove cigarette recirculation blower exhaust pass (5) is connected with moderate oven cigarette circulation spout (6).The utility model is applied to double reheat circulation Turbo-generator Set.
Description
technical field:
the utility model relates to a kind of middle temperature flue gas recirculation device regulating steam temperature, for double reheat circulation Turbo-generator Set, for adjusting the reheater system caloric receptivity of double reheat boiler, and as controlling the Main Means of reheated steam outlet temperature.
background technology:
for the policy that response national energy-saving reduces discharging, improve the operational efficiency of thermal power generation unit, reduce gross coal consumption rate and pollutant emission, China's thermoelectric generator group technique has entered into the double reheat cycle stage.Improving Turbo-generator Set operational efficiency by adopting mode that existing steam turbine initial conditions, double reheat circulate is very effective means.According to the difference of unit parameter, double reheat power generation sets is adjusted to from conventional single reheat unit, generatine set heat efficiency can improve about 2 ~ 4%, the Utilities Electric Co. of China has realized that the significance of building double reheat power generation sets, in newly-built thermal power generation unit, just progressively increase the proportion of double reheat power generation sets, for the double reheat boiler matched with unit, reheater heating surface heat absorption ratio increases, superheater surface heat absorption ratio reduces, adopt the design of conventional single reheat boiler cannot meet the requirement of reheater system caloric receptivity, need a kind of method finding applicable double reheat boiler reheater vapor (steam) temperature to regulate, ensure double reheat boiler safety, stably run.
utility model content:
the purpose of this utility model is to provide the middle temperature flue gas recirculation device that a kind of regulates steam temperature.
above-mentioned object is realized by following technical scheme:
a kind of middle temperature flue gas recirculation device regulating steam temperature, its composition comprises: moderate oven cigarette extracts flue, described moderate oven cigarette extracts flue and is connected with boiler economizer exhaust pass, moderate oven cigarette mixing flue respectively, described moderate oven cigarette mixing flue is connected with stove cigarette recirculation blower gas approach, described stove cigarette recirculation blower gas approach is connected with stove cigarette recirculation blower, and the exhaust pass of described stove cigarette recirculation blower recycles spout with moderate oven cigarette and is connected.
the middle temperature flue gas recirculation device of described adjustment steam temperature, described moderate oven cigarette recirculation spout is arranged in boiler lower hearth region.
the middle temperature flue gas recirculation device of described adjustment steam temperature, is provided with four moderate oven cigarette recirculation spouts in described boiler lower hearth.
the middle temperature flue gas recirculation device of described adjustment steam temperature, described stove cigarette recirculation blower gas approach is connected with four stove cigarette recirculation blowers respectively.
beneficial effect:
1. the utility model is for improving thermal power generation unit overall thermal cycle efficieny, reduce unit generation coal consumption and pollutant emission, China starts to gradually adopt double reheat circulation Turbo-generator Set in the recent period, for the double reheat boiler matched with unit, reheater heating surface heat absorption ratio increases, and superheater surface heat absorption ratio reduces.Especially because reheater heating surface is all convection heating surface, the design of conventional single reheat boiler is adopted cannot to meet the requirement of reheater system caloric receptivity.The scheme of warm flue gas recirculation in employing, namely can increase the caloric receptivity of reheater heating surface, can realize again the well-tuned to reheater vapor (steam) temperature.Warm flue gas recirculation system warm boiler smoke from economizer exit (or flue gas denitrification system entrance) extracts in this, utilizes flue dilatation and related measure to reduce dust content, and sends into burner hearth by gas recirculating fan.
the utility model is applicable to double reheat circulation Turbo-generator Set, for adjusting the reheater system caloric receptivity of double reheat boiler, and as controlling the Main Means of reheater outlet steam temperature.
this flue gas recirculation system of the utility model extracts moderate oven cigarette in boiler left and right side flue, by gas recirculating fan, moderate oven cigarette is boosted, arrange moderate oven cigarette spout in boiler lower hearth region, ensure that moderate oven cigarette can spray into burner hearth with certain speed.
the utility model is warm flue gas in the outlet of double reheat boiler economizer or flue gas denitrification system entrance are extracted, and utilizes flue dilatation and related measure to reduce dust content, and sends into burner hearth by gas recirculating fan.
accompanying drawing illustrates:
accompanying drawing 1 is middle temperature flue gas recirculation system vertical structure schematic diagram of the present utility model.
accompanying drawing 2 is middle temperature flue gas recirculation system level structural representations of the present utility model.
detailed description of the invention:
embodiment 1:
a kind of middle temperature flue gas recirculation device regulating steam temperature, its composition comprises: moderate oven cigarette extracts flue, described moderate oven cigarette extracts flue and is connected with boiler economizer exhaust pass, moderate oven cigarette mixing flue respectively, described moderate oven cigarette mixing flue is connected with stove cigarette recirculation blower gas approach, described stove cigarette recirculation blower gas approach is connected with stove cigarette recirculation blower, and the exhaust pass of described stove cigarette recirculation blower recycles spout with moderate oven cigarette and is connected.
embodiment 2:
warm flue gas recirculation device in adjustment steam temperature according to embodiment 1, described moderate oven cigarette recirculation spout is arranged in boiler lower hearth region.
embodiment 3:
warm flue gas recirculation device in adjustment steam temperature according to embodiment 1 or 2, is provided with four moderate oven cigarette recirculation spouts in described boiler lower hearth.
embodiment 4:
warm flue gas recirculation device in adjustment steam temperature according to embodiment 1 or 2 or 3, described stove cigarette recirculation blower gas approach is connected with four stove cigarette recirculation blowers respectively.
Claims (4)
1. one kind regulates the middle temperature flue gas recirculation device of steam temperature, its composition comprises: moderate oven cigarette extracts flue, it is characterized in that: described moderate oven cigarette extracts flue and is connected with boiler economizer exhaust pass, moderate oven cigarette mixing flue respectively, described moderate oven cigarette mixing flue is connected with stove cigarette recirculation blower gas approach, described stove cigarette recirculation blower gas approach is connected with stove cigarette recirculation blower, and the exhaust pass of described stove cigarette recirculation blower recycles spout with moderate oven cigarette and is connected.
2. the middle temperature flue gas recirculation device of adjustment steam temperature according to claim 1, is characterized in that: described moderate oven cigarette recirculation spout is arranged in boiler lower hearth region.
3. the middle temperature flue gas recirculation device of adjustment steam temperature according to claim 1 and 2, is characterized in that: be provided with four moderate oven cigarette recirculation spouts in described boiler lower hearth.
4. the middle temperature flue gas recirculation device of adjustment steam temperature according to claim 1 and 2, is characterized in that: described stove cigarette recirculation blower gas approach is connected with four stove cigarette recirculation blowers respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420729197.8U CN204240340U (en) | 2014-11-28 | 2014-11-28 | Regulate the middle temperature flue gas recirculation device of steam temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420729197.8U CN204240340U (en) | 2014-11-28 | 2014-11-28 | Regulate the middle temperature flue gas recirculation device of steam temperature |
Publications (1)
| Publication Number | Publication Date |
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| CN204240340U true CN204240340U (en) | 2015-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420729197.8U Active CN204240340U (en) | 2014-11-28 | 2014-11-28 | Regulate the middle temperature flue gas recirculation device of steam temperature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501140A (en) * | 2014-11-28 | 2015-04-08 | 哈尔滨锅炉厂有限责任公司 | Medium-temperature smoke re-circulating system for regulating steam temperature and circulating method |
-
2014
- 2014-11-28 CN CN201420729197.8U patent/CN204240340U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501140A (en) * | 2014-11-28 | 2015-04-08 | 哈尔滨锅炉厂有限责任公司 | Medium-temperature smoke re-circulating system for regulating steam temperature and circulating method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |