CN203771432U - Adjustable denitration-smoke temperature control system - Google Patents
Adjustable denitration-smoke temperature control system Download PDFInfo
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- CN203771432U CN203771432U CN201420009792.4U CN201420009792U CN203771432U CN 203771432 U CN203771432 U CN 203771432U CN 201420009792 U CN201420009792 U CN 201420009792U CN 203771432 U CN203771432 U CN 203771432U
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- economizer
- feedwater piping
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Abstract
The utility model discloses an adjustable denitration-smoke temperature control system. The adjustable denitration-smoke temperature control system comprises a boiler, water feeding pipelines and a flow adjusting valve, wherein a smoke channel of the boiler is internally provided with a first coal economizer, a second coal economizer and an SCR (Selective Catalytic Reduction) denitrator; the SCR denitrator is positioned between the first coal economizer and the second coal economizer; the water feeding pipelines comprise a first water feeding pipeline and a second water feeding pipeline which are connected in parallel; the two ends of the first water feeding pipeline are connected with the first coal economizer and the second coal economizer; the two ends of the second water feeding pipeline are connected with the first coal economizer and the second coal economizer; the first water feeding pipeline and/or the second water feeding pipeline is provided with the flow adjusting valve. The adjustable denitration-smoke temperature control system disclosed by the utility model has the advantages that by controlling the feeding amount of water in the second water feeding pipeline, the temperature of smoke meets the corresponding requirement when the smoke reaches the SCR denitrator; by the action of the second coal economizer, the heat in the smoke can be fully utilized and the SCR denitrator is effectively utilized, so that the environment can be better protected, and the pollution is less; and meanwhile, the heat is effectively recovered, so that the energy is saved.
Description
Technical field
The utility model relates to a kind of adjustable denitration fibre selection system.
Background technology
SCR(Selective Catalytic Reduction; Being again selective catalytic reduction) denitrification apparatus is the environmental protection equipment that must be equipped with in coal-burning boiler, for reducing the nitrogen oxide (NOx) that combustion process generates.In SCR denitrification apparatus, catalyst is housed, can makes optionally preferential and reaction of nitrogen oxides of reducing agent, generate harmless nitrogen G&W.
SCR denitrification apparatus there are certain requirements entrance flue gas temperature, requiring flue-gas temperature is 320～400 ℃, traditional boiler plant is when operating at full capacity, can meet the related request that smoke inlet temperature reaches SCR denitrification apparatus, but when lower than 50% load operation, smoke inlet temperature does not reach 320 ℃, therefore, traditional boiler does not drop into denitration under loading lower than 50% duty, cause the utilization rate of SCR denitrification apparatus low, meanwhile, the nitrogen oxide in flue gas is directly drained in atmosphere without the reduction of reducing agent, has polluted environment.
Summary of the invention
The purpose of this utility model is to provide a kind of adjustable denitration fibre selection system that can effectively utilize flue gas heat when can guarantee boiler utilization ratio.
In order to realize the purpose of this utility model, the technical scheme of taking is:
A kind of adjustable denitration fibre selection system, comprise boiler, feedwater piping, flow control valve, in the exhaust gases passes of boiler, be provided with the first economizer, the second economizer, SCR denitrator, SCR denitrator is between the first economizer and the second economizer, feedwater piping comprises the first feedwater piping and the second feedwater piping being in parallel, the first feedwater piping two ends connect the first economizer, the second economizer, the second feedwater piping two ends connect the first economizer, the second economizer, and described the first feedwater piping and/or the second feedwater piping are provided with flow control valve.
The effect of economizer is for reclaiming the heat of high-temperature flue gas, thereby improve the utilization rate of boiler heat-energy, when boiler turns round under higher load condition, flue-gas temperature while arriving the first economizer is higher, by controlling the water yield of supplying with in the second feedwater piping, in the position of the first economizer, absorb a part of heat of high-temperature flue gas, while making high-temperature flue gas arrive SCR denitrator, temperature maintains the comparatively ideal temperature of 360～380 ℃, when temperature is lower, when boiler load is lower, reduce the quantity delivered of water in the second feedwater piping, thereby the flue-gas temperature while making to arrive SCR denitrator reaches corresponding requirement, when flue gas still possesses higher temperature after SCR denitrator, at this, at least one second economizer is set again, by the effect of the second economizer, heat in flue gas can be made full use of, adopt this structure, guaranteed that SCR denitrator also can effectively utilize SCR denitrator at boiler under compared with the duty of underload, thereby can better protection of the environment, compared with of low pollution, simultaneously, by sectionalized economizer is set, heat in flue gas has been carried out effectively reclaiming, saved the energy, improved the utilization rate of boiler heat, reduced cost.
Below technical scheme is further illustrated:
Preferably, described first feedwater piping one end is connected with the upstream of the first economizer, the other end is connected with feedwater piping delivery port, described second feedwater piping one end is connected with the downstream of the first economizer, the other end is connected with the upstream of the second economizer, the downstream of the second economizer is connected with feedwater piping water inlet, and described flow control valve is located in the first supply line.Adopt in this way, water in the second feedwater piping is first through the second economizer, the second economizer heats for the first time to the water in the second feedwater piping, water after heating heats for the second time in being transported to the first economizer, thus the utilization rate of heat improve flue gas in the flue-gas temperature that guarantees arrival SCR denitrator in.
Preferably, described first feedwater piping one end is connected with the upstream of the first economizer, the other end is connected with feedwater piping delivery port, described second feedwater piping one end is connected with the downstream of the first economizer, the other end is connected with feedwater piping water inlet, the downstream of the second economizer is connected with feedwater piping water inlet, and described flow control valve is located on the pipeline between the first economizer upstream and feedwater piping delivery port.Adopt in this way, the water in the second feedwater piping directly carries out heating in the first economizer, thus the utilization rate of heat improve flue gas in the flue-gas temperature that guarantees arrival SCR denitrator in.
Preferably, between described the first economizer and SCR denitrator, be provided with at least one economizer.While at least one economizer being set again between the first economizer and SCR denitrification apparatus, can better utilize the heat energy in flue gas, when boiler is operated with full load, after the first economizer, flue-gas temperature is appointed so can be higher, in order to reach more desirable state of temperature, can to flue gas, further lower the temperature by the economizer between the first economizer and SCR denitrator, thereby make flue-gas temperature arrive desirable temperature.
Preferably, between described the second economizer and SCR denitrator, be provided with at least one economizer.At least one economizer is set between the second economizer and denitrator, can more effectively utilizes remaining heat in flue gas, thereby further reduce the loss of boiler heat-energy, save the energy, improve boiler heat-energy utilization rate.
The utility model has the advantages that:
The effect of economizer is for reclaiming the heat of high-temperature flue gas, thereby improve the utilization rate of boiler heat-energy, when boiler turns round under higher load condition, flue-gas temperature while arriving the first economizer is higher, by controlling the water yield of supplying with in the second feedwater piping, in the position of the first economizer, absorb a part of heat of high-temperature flue gas, while making high-temperature flue gas arrive SCR denitrator, temperature maintains the comparatively ideal temperature of 360～380 ℃, when temperature is lower, when boiler load is lower, reduce the quantity delivered of water in the second feedwater piping, thereby the flue-gas temperature while making to arrive SCR denitrator reaches corresponding requirement, when flue gas still possesses higher temperature after SCR denitrator, at this, at least one second economizer is set again, by the effect of the second economizer, heat in flue gas can be made full use of, adopt this structure, guaranteed that SCR denitrator also can effectively utilize SCR denitrator at boiler under compared with the duty of underload, thereby can better protection of the environment, compared with of low pollution, simultaneously, by sectionalized economizer is set, heat in flue gas has been carried out effectively reclaiming, saved the energy, improved the utilization rate of boiler heat, reduced cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the adjustable denitration fibre selection of the utility model system embodiment 1;
Fig. 2 is the schematic diagram of the adjustable denitration fibre selection of the utility model system embodiment 2.
Description of reference numerals:
100. boilers, 201. first feedwater pipings, 202. second feedwater pipings, 203. feedwater piping delivery ports, 204. feedwater piping water inlets, 301. first economizers, 302. second economizers, 400.SCR denitrator, 500. flow control valves.
The specific embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated:
Embodiment 1:
As shown in Figure 1, in embodiment 1 of the present utility model, a kind of adjustable denitration fibre selection system, comprise boiler 100, feedwater piping, in the exhaust gases passes of boiler 100, be provided with the first economizer 301, the second economizer 302, SCR denitrator 400, SCR denitrator 400 is between the first economizer 301 and the second economizer 302, feedwater piping comprises the first feedwater piping 201 and the second feedwater piping 202 being in parallel, the first feedwater piping 201 two ends connect the first economizer 301, the second economizer 302, the second feedwater piping 202 two ends connect the first economizer 301, the second economizer 302.
The effect of economizer is for reclaiming the heat of high-temperature flue gas, thereby improve the utilization rate of boiler 100 heat energy, when boiler 100 turns round under higher load condition, flue-gas temperature while arriving the first economizer 301 is higher, by controlling the water yield of supplying with in the second feedwater piping 202, in the position of the first economizer 301, absorb a part of heat of high-temperature flue gas, while making high-temperature flue gas arrive SCR denitrator 400, temperature maintains the comparatively ideal temperature of 360～380 ℃, when temperature is lower, when boiler 100 load is lower, reduce the quantity delivered of water in the second feedwater piping 202, thereby the flue-gas temperature while making to arrive SCR denitrator 400 reaches corresponding requirement, when flue gas still possesses higher temperature after SCR denitrator 400, at this, at least one second economizer 302 is set again, by the effect of the second economizer 302, heat in flue gas can be made full use of, adopt this structure, guaranteed that SCR denitrator 400 also can effectively utilize SCR denitrator 400 at boiler 100 under compared with the duty of underload, thereby can better protection of the environment, compared with of low pollution, simultaneously, by sectionalized economizer is set, heat in flue gas has been carried out effectively reclaiming, saved the energy, improved the utilization rate of boiler 100 heats, reduced cost.
Described first feedwater piping 201 one end are connected with the upstream of the first economizer 301, the other end is connected with feedwater piping delivery port 203, described second feedwater piping 202 one end are connected with the downstream of the first economizer 301, the other end is connected with the upstream of the second economizer 302, and the downstream of the second economizer 302 is connected with feedwater piping water inlet 204.Adopt in this way, water in the second feedwater piping 202 is first through the second economizer 302, water in second 302 pairs, economizer the second feedwater piping 202 heats for the first time, water after heating heats for the second time in being transported to the first economizer 301, thus the utilization rate of heat improve flue gas in the flue-gas temperature that guarantees arrival SCR denitrator in.
In the present embodiment, adjustable denitration fibre selection system also comprises flow control valve 500, described flow control valve is installed on the first supply line 201, for controlling the water yield of the first supply line 201, because total streamflow is certain, by regulating the water yield in the first supply line 201, can reach the object of the water yield in regulation and control the second supply line 202, final realization controlled the flue-gas temperature that arrives SCR denitrator porch.
In the present embodiment, between the first economizer 301 and SCR denitrator 400, be not provided with extra economizer, in other embodiments, can also between described the first economizer 301 and SCR denitrator 400, be provided with at least one economizer.While at least one economizer being set again between the first economizer 301 and SCR denitrification apparatus, can better utilize the heat energy in flue gas, when boiler 100 is operated with full load, after the first economizer 301, flue-gas temperature is appointed so can be higher, in order to reach more desirable state of temperature, can to flue gas, further lower the temperature by the economizer between the first economizer 301 and SCR denitrator 400, thereby make flue-gas temperature arrive desirable temperature.
In the present embodiment, between the second economizer 302 and SCR denitrator 400, be not provided with extra economizer, in other embodiments, can also between described the second economizer 302 and SCR denitrator 400, be provided with at least one economizer.Between the second economizer 302 and denitrator, at least one economizer is set, can more effectively utilizes remaining heat in flue gas, thereby further reduce the loss of boiler 100 heat energy, save the energy, improve boiler 100 heat utilization rates.
Embodiment 2:
As shown in Figure 2, in embodiment 2 of the present utility model, described first feedwater piping 201 one end are connected with the upstream of the first economizer 301, the other end is connected with feedwater piping delivery port 203, described second feedwater piping 202 one end are connected with the downstream of the first economizer 301, the other end is connected with feedwater piping water inlet 204, and the downstream of the second economizer 302 is connected with feedwater piping water inlet 204.Adopt in this way, the water in the second feedwater piping 202 directly carries out heating in the first economizer 301, thus the utilization rate of heat improve flue gas in the flue-gas temperature that guarantees arrival SCR denitrator in.
In the present embodiment, adjustable denitration fibre selection system also comprises flow control valve 500, described flow control valve is installed on the pipeline between the first economizer 301 upstreams and feedwater piping delivery port 203, for controlling the water yield of the second supply line 202, final realization controlled the flue-gas temperature that arrives SCR denitrator porch.
In the utility model, also flow control valve 500 can be set, the resistance difference by each pipeline and its connection device carries out assignment of traffic, equally also can reach the effect of controlling flow.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (5)
1. an adjustable denitration fibre selection system, it is characterized in that, comprise boiler, feedwater piping, flow control valve, in the exhaust gases passes of boiler, be provided with the first economizer, the second economizer, SCR denitrator, SCR denitrator is between the first economizer and the second economizer, feedwater piping comprises the first feedwater piping and the second feedwater piping being in parallel, the first feedwater piping two ends connect the first economizer, the second economizer, the second feedwater piping two ends connect the first economizer, the second economizer, described the first feedwater piping and/or the second feedwater piping are provided with flow control valve.
2. adjustable denitration fibre selection system according to claim 1, it is characterized in that, described first feedwater piping one end is connected with the upstream of the first economizer, the other end is connected with feedwater piping delivery port, described second feedwater piping one end is connected with the downstream of the first economizer, the other end is connected with the upstream of the second economizer, and the downstream of the second economizer is connected with feedwater piping water inlet, and described flow control valve is located in the first supply line.
3. adjustable denitration fibre selection system according to claim 1, it is characterized in that, described first feedwater piping one end is connected with the upstream of the first economizer, the other end is connected with feedwater piping delivery port, described second feedwater piping one end is connected with the downstream of the first economizer, the other end is connected with feedwater piping water inlet, and the downstream of the second economizer is connected with feedwater piping water inlet, and described flow control valve is located on the pipeline between the first economizer upstream and feedwater piping delivery port.
4. according to the adjustable denitration fibre selection system described in claim 1-3 any one, it is characterized in that, between described the first economizer and SCR denitrator, be provided with at least one economizer.
5. according to the adjustable denitration fibre selection system described in claim 1-3 any one, it is characterized in that, between described the second economizer and SCR denitrator, be provided with at least one economizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420009792.4U CN203771432U (en) | 2014-01-07 | 2014-01-07 | Adjustable denitration-smoke temperature control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420009792.4U CN203771432U (en) | 2014-01-07 | 2014-01-07 | Adjustable denitration-smoke temperature control system |
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| CN203771432U true CN203771432U (en) | 2014-08-13 |
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| CN201420009792.4U Expired - Fee Related CN203771432U (en) | 2014-01-07 | 2014-01-07 | Adjustable denitration-smoke temperature control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017915A (en) * | 2021-11-08 | 2022-02-08 | 山东宝安环保科技股份有限公司 | Water jacket heating furnace flue gas rarefied alum-free denitration device |
-
2014
- 2014-01-07 CN CN201420009792.4U patent/CN203771432U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017915A (en) * | 2021-11-08 | 2022-02-08 | 山东宝安环保科技股份有限公司 | Water jacket heating furnace flue gas rarefied alum-free denitration device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC Free format text: FORMER NAME: CHINA ENERGY ENGINEERING GROUP GUANGDONG ELECTRIC POWER DESIGN INSTITUTE |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee after: Company limited of China Energy Engineering Group Guangdong Electric Power Design Institute Address before: 510663 Luogang District, Guangdong, Guangzhou Science City Fung Road, No. 1, No. Patentee before: Guangdong Electric Power Design Institute of CEEC |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20210107 |
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| CF01 | Termination of patent right due to non-payment of annual fee |