CN101701717A - Heating process of low-temperature flue gas with wetting flue gas desulphurization - Google Patents
Heating process of low-temperature flue gas with wetting flue gas desulphurization Download PDFInfo
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- CN101701717A CN101701717A CN200910023955A CN200910023955A CN101701717A CN 101701717 A CN101701717 A CN 101701717A CN 200910023955 A CN200910023955 A CN 200910023955A CN 200910023955 A CN200910023955 A CN 200910023955A CN 101701717 A CN101701717 A CN 101701717A
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Abstract
The invention relates to a heating process of low-temperature flue gas with wetting flue gas desulphurization; an adsorption tower is directly connected with a chimney by a pipeline, and a hot secondary air pipe of a boiler air preheater, which is used for heating low-temperature flue gas at the outlet of an absorption tower, is connected on the pipeline for connecting the absorption tower and the chimney. In the invention, GGH (Gas GasHeater) is removed to thoroughly solve the problems that the heating effect is poor, the desulphurization performance is unstable, availability factor is low and the operation is dis-economic owning to GGH scaling and blocking, so as to reduce the service-power consumption rate of a desulphurization system; in addition, the invention has flexible adjustability, can heat the low-temperature flue gas at the outlet of the absorption tower of the desulphurization device to the temperature needed by safe discharge by pumping secondary wind along with the change of the boiler load; the desulphurization flue gas temperature can be heated to above dew-point temperature of the glue gas according to the safety of the chimney, so as to avoid special anticorrosion renovation to the chimney; furthermore, the desulphurized flue gas lifting and diffusion effect is improved.
Description
Technical field
The invention belongs to the Coal,steam plant with FGD field of engineering technology, be specifically related to the low-temperature flue gas heating process behind a kind of wet process of FGD.
Background technology
At present the thermal power plant wet flue gas desulfurizer adopt mostly GGH add low-temperature flue gas behind the thermally desulfurizing with weaken flue gas in chimney coagulability and improve the lifting emission effect of flue gas.From operational effect, many devices all exist because GGH fouling, the problem of stopping up that heating weak effect, desulfurization performance instability, the availability cause are not high, operation is uneconomical etc.Many power plant are subjected to the puzzlement of GGH fouling blockage problem for a long time, frequent desulfurizer is stopped transport washed, during this period, desulfurizer is forced to stop transport, have only and open the normal operation that the bypass flue just is unlikely to have influence on main frame, but caused the serious environmental pollution like this, in environmental requirement strict day by day today, this situation is having a strong impact on the economic interests even the ordinary production of enterprise.The GGH heat exchange element itself is easily stifled resistance element, under the prerequisite that appearance and size is determined, heat exchange effect and its resistance are a pair of intrinsic contradiction, in order to guarantee enough thermal effects that adds, heat exchange element must have enough height and as far as possible little through-flow gap, thereby the increase heat exchange area, but the increase of resistance that reduces directly to cause GGH of the increase of heat exchange element height and through-flow gap causes the generation of easy fouling and stopping state.Cancellation GGH and do not have power plant under the situation of effective heater means and must consider low-temperature flue gas carefully the burn into low-temperature flue gas of chimney is discharged the discharging diffusion behind the chimney and the preservative treatment of chimney, otherwise will bring new problem to power plant.To fundamentally eliminate the GGH fouling, stop up problem and hidden danger that desulfurizer is brought, must seek a kind of brand-new, more economical flue gas mode of heating, thereby thoroughly change existing GGH mode of heating.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, provide a kind of and can thoroughly solve, stopped up the low-temperature flue gas heating process behind the wet process of FGD of problems such as heating weak effect, desulfurization performance instability, the availability cause are not high, operation is uneconomical because of the GGH fouling.
For achieving the above object, the technical solution used in the present invention is: absorption tower outlet directly links to each other with chimney by pipeline, and is connected with on the clean flue gas flue before entering chimney and is used to heat the hot secondary air channel that the absorption tower exports the boiler air preheater of low-temperature flue gas.
Also be connected with the flat GGH heat exchange element in big gap on absorption tower of the present invention inlet and the export pipeline; On the hot secondary air channel of boiler air preheater hot secondary air adjustor valve is installed also.
The present invention invent removed the GGH heat exchange element or will but the less heat exchange element in original GGH gap is replaced by the heat exchange element in big gap; Adopt the low-temperature flue gas after hot secondary wind heats wet process of FGD; More than two kinds of schemes all can thoroughly solve or effectively solve because of the GGH fouling, stop up problems such as the heating weak effect, desulfurization performance instability, the availability that cause are not high, operation is uneconomical, can reduce the desulphurization system power consumption, thereby reduce the shared station service power consumption rate of desulphurization system; And the present invention has controllability flexibly, the low-temperature flue gas of desulfurizer absorbing tower outlet can be heated to the required temperature of safety dumping along with what that extract secondary wind the variation of boiler load change; Can the desulfurization flue-gas temperature be heated to more than the flue gas dew point according to the security needs of chimney, chimney be carried out special anticorrosion transformation thereby remove from; Can improve the lifting and the diffusion effect of flue gas after desulfurization, weaken or eliminate chimney " rain gypsum " phenomenon.
Description of drawings
Fig. 1 is the schematic diagram of the embodiment of the invention 1;
Fig. 2 is the schematic diagram of the embodiment of the invention 2.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
The present invention removes GGH or keeps GGH but the bigger flat GGH heat exchange original paper in employing gap, can thoroughly solve because of the GGH fouling, stop up problems such as heating weak effect, desulfurization performance instability, the availability cause are not high, operation is uneconomical, thereby or the obstruction cycle that prolongs GGH greatly reduce because of obstruction and cause desulfurizer flushing environmental protection risk and the economic loss brought of frequently stopping transport; Because the desulphurization system resistance reduces greatly after removing GGH or changing the bigger flat heat exchange original paper in gap, can reduce the desulphurization system power consumption, thereby reduces the shared station service power consumption rate of desulphurization system; And the present invention has controllability flexibly, the low-temperature flue gas of desulfurizer outlet can be heated to the required temperature of safety dumping along with what that extract secondary wind the variation of boiler load change; Also can the desulfurization flue-gas temperature be heated to more than the flue gas dew point, chimney be carried out special anticorrosion transformation thereby remove from according to the security needs of chimney; Can improve the lifting and the diffusion effect of flue gas after desulfurization, weaken or eliminate chimney " rain gypsum " phenomenon.
Usually the discharging flue-gas temperature after guaranteeing to heat behind the thermal power plant desulfurizer employing GGH is more than 72 ℃ or 80 ℃, therefore, in the enforcement link of the present utility model related extraction secondary wind how much be to guarantee after the final Hybrid Heating that the flue gas mean temperature reaches 72 ℃ or 80 ℃ or required higher temperature is (this Hybrid Heating temperature is decided according to the requirement of local atmospheric environment, fume emission and lifting effect and environmental administration) determined of prerequisite.What of the hot secondary air flow that calculates according to flue gas flow, flue-gas temperature, the flue gas composition of desulfurizer absorbing tower outlet in the technology implementation process and determine to be extracted.
Claims (3)
1. the low-temperature flue gas heating process behind the wet process of FGD, it is characterized in that: absorption tower outlet directly links to each other with chimney by pipeline, and is connected with on the clean flue gas flue before entering chimney and is used to heat the hot secondary air channel that the absorption tower exports the boiler air preheater of low-temperature flue gas.
2. the low-temperature flue gas heating process behind the wet process of FGD according to claim 1 is characterized in that: the flat GGH heat exchange element that also is connected with big gap on said absorption tower inlet and the export pipeline.
3. the low-temperature flue gas heating process behind the wet process of FGD according to claim 1 is characterized in that: on the hot secondary air channel of said boiler air preheater hot secondary air adjustor valve is installed also.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910023955A CN101701717A (en) | 2009-09-17 | 2009-09-17 | Heating process of low-temperature flue gas with wetting flue gas desulphurization |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910023955A CN101701717A (en) | 2009-09-17 | 2009-09-17 | Heating process of low-temperature flue gas with wetting flue gas desulphurization |
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| CN101701717A true CN101701717A (en) | 2010-05-05 |
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| CN200910023955A Pending CN101701717A (en) | 2009-09-17 | 2009-09-17 | Heating process of low-temperature flue gas with wetting flue gas desulphurization |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401369A (en) * | 2010-09-07 | 2012-04-04 | 福建成信绿集成有限公司 | Method for improving quality of recyclable exhaust waste heat in power plant boiler and progressively utilizing exhaust waste heat |
| CN102419359A (en) * | 2011-09-06 | 2012-04-18 | 浙江省电力试验研究院 | Method for estimating performance of additive for limestone wet-method flue gas desulfurization |
| CN103278017A (en) * | 2013-05-27 | 2013-09-04 | 中冶北方（大连）工程技术有限公司 | Device preventing diffusing chimney of blower-driven drying segment of grate kiln from condensing |
| CN103574630A (en) * | 2012-07-19 | 2014-02-12 | 中国电力工程顾问集团华东电力设计院 | Method for improving temperature of smoke discharged by chimney of thermal power plant, smoke heating system and thermal power generation unit |
| CN106178857A (en) * | 2016-09-13 | 2016-12-07 | 上海天晓环保工程有限公司 | One not blowing out coke oven flue gas desulfurizing fly ash technological process |
| CN106838955A (en) * | 2017-01-25 | 2017-06-13 | 浙江环兴机械有限公司 | Efficiently take off white device and its operating method |
| CN106838962A (en) * | 2017-03-20 | 2017-06-13 | 江苏正通宏泰股份有限公司 | A kind of desulfurization fume dehumidification tapping equipment |
| CN107191956A (en) * | 2017-07-25 | 2017-09-22 | 史汉祥 | A kind of flue gas purification system |
| CN108525503A (en) * | 2018-06-14 | 2018-09-14 | 河北星耀环境科技有限公司 | A kind of flue gas disappears white device |
-
2009
- 2009-09-17 CN CN200910023955A patent/CN101701717A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401369A (en) * | 2010-09-07 | 2012-04-04 | 福建成信绿集成有限公司 | Method for improving quality of recyclable exhaust waste heat in power plant boiler and progressively utilizing exhaust waste heat |
| CN102401369B (en) * | 2010-09-07 | 2013-08-14 | 成信绿集成股份有限公司 | Method for improving quality of recyclable exhaust waste heat in power plant boiler and progressively utilizing exhaust waste heat |
| CN102419359A (en) * | 2011-09-06 | 2012-04-18 | 浙江省电力试验研究院 | Method for estimating performance of additive for limestone wet-method flue gas desulfurization |
| CN103574630A (en) * | 2012-07-19 | 2014-02-12 | 中国电力工程顾问集团华东电力设计院 | Method for improving temperature of smoke discharged by chimney of thermal power plant, smoke heating system and thermal power generation unit |
| CN103574630B (en) * | 2012-07-19 | 2016-08-03 | 中国电力工程顾问集团华东电力设计院有限公司 | Improve the method for temperature of smoke discharged by chimney of thermal power and flue gas heating system and fired power generating unit |
| CN103278017A (en) * | 2013-05-27 | 2013-09-04 | 中冶北方（大连）工程技术有限公司 | Device preventing diffusing chimney of blower-driven drying segment of grate kiln from condensing |
| CN106178857A (en) * | 2016-09-13 | 2016-12-07 | 上海天晓环保工程有限公司 | One not blowing out coke oven flue gas desulfurizing fly ash technological process |
| CN106178857B (en) * | 2016-09-13 | 2018-09-18 | 上海天晓环保工程有限公司 | A kind of not blowing out coke oven flue gas desulfurizing fly ash technological process |
| CN106838955A (en) * | 2017-01-25 | 2017-06-13 | 浙江环兴机械有限公司 | Efficiently take off white device and its operating method |
| CN106838962A (en) * | 2017-03-20 | 2017-06-13 | 江苏正通宏泰股份有限公司 | A kind of desulfurization fume dehumidification tapping equipment |
| CN107191956A (en) * | 2017-07-25 | 2017-09-22 | 史汉祥 | A kind of flue gas purification system |
| CN107191956B (en) * | 2017-07-25 | 2024-03-08 | 史汉祥 | Flue gas purifying system |
| CN108525503A (en) * | 2018-06-14 | 2018-09-14 | 河北星耀环境科技有限公司 | A kind of flue gas disappears white device |
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Application publication date: 20100505 |