CN104501140A - Medium-temperature smoke re-circulating system for regulating steam temperature and circulating method - Google Patents
Medium-temperature smoke re-circulating system for regulating steam temperature and circulating method Download PDFInfo
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- CN104501140A CN104501140A CN201410702006.3A CN201410702006A CN104501140A CN 104501140 A CN104501140 A CN 104501140A CN 201410702006 A CN201410702006 A CN 201410702006A CN 104501140 A CN104501140 A CN 104501140A
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Abstract
The invention discloses a circulating method of a medium-temperature smoke re-circulating system for regulating steam temperature. A secondary reheating boiler matched with a unit has the defects that the heat absorption ratio of a heated surface of a reheater is increased, the heat absorption ratio of a heated surface of a superheater is reduced, and the requirement for the heat absorption quantity of a reheater system cannot be met according to the scheme that a conventional primary reheating boiler is adopted, so that a method suitable for regulating the steam temperature of the reheater of the secondary reheating boiler is needed to be found to ensure the stable operation of the secondary reheating boiler. The medium-temperature smoke re-circulating system for regulating steam temperature comprises a medium-temperature furnace smoke extraction flue (1), wherein the medium-temperature furnace smoke extraction flue is respectively connected with an outlet flue (7) of a boiler economizer and a medium-temperature furnace smoke mixing flue (2); the medium-temperature furnace smoke mixing flue is connected with a furnace smoke re-circulating fan inlet flue (3); the furnace smoke re-circulating fan inlet flue is connected with a furnace smoke re-circulating fan (4); and a furnace smoke re-circulating fan outlet flue (5) is connected with a medium-temperature furnace smoke circulating nozzle (6). The circulating method is mainly applied to a secondary reheating circulation steam turbine generator unit.
Description
technical field:
the present invention relates to a kind of middle temperature flue gas recirculation system and the round-robin method that regulate 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.
summary of the invention:
the object of this invention is to provide a kind of round-robin method regulating the middle temperature flue gas recirculation system of steam temperature.
above-mentioned object is realized by following technical scheme:
a kind of middle temperature flue gas recirculation system 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 round-robin method of the middle temperature flue gas recirculation system of described adjustment steam temperature, the method comprises the steps: the effective head utilizing stove cigarette recirculation blower to provide, moderate oven cigarette is extracted out from double reheat boiler economizer exhaust pass or equipment for denitrifying flue gas gas approach, mix through moderate oven cigarette mixing flue, after the boosting of stove cigarette recirculation blower, boiler furnace is sent into, by regulating the regulatory function of flue gas recycled flow realization to reheater vapor (steam) temperature by moderate oven cigarette recirculation spout.
the round-robin method of the middle temperature flue gas recirculation system of described adjustment steam temperature, described flue gas recirculation system, described stove cigarette recirculation blower boosts to moderate oven cigarette; Described moderate oven cigarette is extracted by flue, right side flue on the left of boiler, arranges moderate oven cigarette spout in boiler lower hearth region, ensures that moderate oven cigarette sprays into burner hearth.
beneficial effect of the present invention:
1. the present invention 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 present invention 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 present invention 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 present invention 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 invention.
accompanying drawing 2 is middle temperature flue gas recirculation system level structural representations of the present invention.
detailed description of the invention:
embodiment 1:
a kind of middle temperature flue gas recirculation system regulating steam temperature, its composition comprises: moderate oven cigarette extracts flue 1, described moderate oven cigarette extracts flue and is connected with boiler economizer exhaust pass 7, moderate oven cigarette mixing flue 2 respectively, described moderate oven cigarette mixing flue is connected with stove cigarette recirculation blower gas approach 3, described stove cigarette recirculation blower gas approach is connected with stove cigarette recirculation blower 4, and the exhaust pass 5 of described stove cigarette recirculation blower recycles spout 6 with moderate oven cigarette and is connected.
embodiment 2:
the round-robin method of warm flue gas recirculation system in adjustment steam temperature according to embodiment 1, the method comprises the steps: the effective head utilizing stove cigarette recirculation blower to provide, moderate oven cigarette is extracted out from double reheat boiler economizer exhaust pass or equipment for denitrifying flue gas gas approach, mix through moderate oven cigarette mixing flue, after the boosting of stove cigarette recirculation blower, boiler furnace is sent into, by regulating the regulatory function of flue gas recycled flow realization to reheater vapor (steam) temperature by moderate oven cigarette recirculation spout.
embodiment 3:
the round-robin method of warm flue gas recirculation system in adjustment steam temperature according to embodiment 1 or 2, described flue gas recirculation system, described stove cigarette recirculation blower boosts to moderate oven cigarette; Described moderate oven cigarette is extracted by flue, right side flue on the left of boiler, arranges moderate oven cigarette spout in boiler lower hearth region, ensures that moderate oven cigarette sprays into burner hearth.
Claims (3)
1. one kind regulates the middle temperature flue gas recirculation system 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 round-robin method of the middle temperature flue gas recirculation system of an adjustment steam temperature according to claim 1, it is characterized in that: the method comprises the steps: the effective head utilizing stove cigarette recirculation blower to provide, moderate oven cigarette is extracted out from double reheat boiler economizer exhaust pass or equipment for denitrifying flue gas gas approach, mix through moderate oven cigarette mixing flue, after the boosting of stove cigarette recirculation blower, boiler furnace is sent into, by regulating the regulatory function of flue gas recycled flow realization to reheater vapor (steam) temperature by moderate oven cigarette recirculation spout.
3. the round-robin method of the middle temperature flue gas recirculation system of adjustment steam temperature according to claim 1 and 2, described flue gas recirculation system, is characterized in that: described stove cigarette recirculation blower boosts to moderate oven cigarette; Described moderate oven cigarette is extracted by flue, right side flue on the left of boiler, arranges moderate oven cigarette spout in boiler lower hearth region, ensures that moderate oven cigarette sprays into burner hearth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410702006.3A CN104501140A (en) | 2014-11-28 | 2014-11-28 | Medium-temperature smoke re-circulating system for regulating steam temperature and circulating method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410702006.3A CN104501140A (en) | 2014-11-28 | 2014-11-28 | Medium-temperature smoke re-circulating system for regulating steam temperature and circulating method |
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| CN104501140A true CN104501140A (en) | 2015-04-08 |
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| CN201410702006.3A Pending CN104501140A (en) | 2014-11-28 | 2014-11-28 | Medium-temperature smoke re-circulating system for regulating steam temperature and circulating method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109084319A (en) * | 2018-08-01 | 2018-12-25 | 中国电建集团江西省电力设计院有限公司 | The flue gas recirculation system to be exchanged heat using two-stage |
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| JP2004197970A (en) * | 2002-12-16 | 2004-07-15 | Miura Co Ltd | Low-nox combustion method, and device thereof |
| CN201852105U (en) * | 2010-09-26 | 2011-06-01 | 安徽金鼎锅炉股份有限公司 | Garbage incinerator |
| CN103776015A (en) * | 2014-02-26 | 2014-05-07 | 章礼道 | Semi-tower three-flue double-damper added jet flow flue gas recirculation secondary reheating power station boiler |
| CN203718787U (en) * | 2013-11-08 | 2014-07-16 | 潘老省 | Fume recycling waste incineration boiler |
| CN204240340U (en) * | 2014-11-28 | 2015-04-01 | 哈尔滨锅炉厂有限责任公司 | Regulate the middle temperature flue gas recirculation device of steam temperature |
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2014
- 2014-11-28 CN CN201410702006.3A patent/CN104501140A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004197970A (en) * | 2002-12-16 | 2004-07-15 | Miura Co Ltd | Low-nox combustion method, and device thereof |
| CN201852105U (en) * | 2010-09-26 | 2011-06-01 | 安徽金鼎锅炉股份有限公司 | Garbage incinerator |
| CN203718787U (en) * | 2013-11-08 | 2014-07-16 | 潘老省 | Fume recycling waste incineration boiler |
| CN103776015A (en) * | 2014-02-26 | 2014-05-07 | 章礼道 | Semi-tower three-flue double-damper added jet flow flue gas recirculation secondary reheating power station boiler |
| CN204240340U (en) * | 2014-11-28 | 2015-04-01 | 哈尔滨锅炉厂有限责任公司 | Regulate the middle temperature flue gas recirculation device of steam temperature |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109084319A (en) * | 2018-08-01 | 2018-12-25 | 中国电建集团江西省电力设计院有限公司 | The flue gas recirculation system to be exchanged heat using two-stage |
| CN109084319B (en) * | 2018-08-01 | 2023-12-19 | 中国电建集团江西省电力设计院有限公司 | Flue gas recirculation system adopting two stages for heat exchange |
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Application publication date: 20150408 |
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| RJ01 | Rejection of invention patent application after publication |