CN204082340U - Dirty nitrogen is utilized to reduce the device of IGCC circulating cooling coolant-temperature gage - Google Patents
Dirty nitrogen is utilized to reduce the device of IGCC circulating cooling coolant-temperature gage Download PDFInfo
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- CN204082340U CN204082340U CN201420478401.3U CN201420478401U CN204082340U CN 204082340 U CN204082340 U CN 204082340U CN 201420478401 U CN201420478401 U CN 201420478401U CN 204082340 U CN204082340 U CN 204082340U
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Abstract
Utilize dirty nitrogen to reduce the device of IGCC circulating cooling coolant-temperature gage, comprise cooling tower and pass into the pipeline being connected with dirty nitrogen bottom cooling tower, pipeline is provided with multiple equally distributed distribution nozzle; Cooling tower is without the need to transformation or transform, and the cooling tower transformed increases in addition in the bottom of cooling tower heat exchange filler to have heat exchange filler bottom one deck; The dirty nitrogen produced by space division system by pipeline introduces the heat exchange filler bottom bottom cooling tower, makes dirty nitrogen be evenly distributed in bottom cooling tower; Dirty nitrogen, by cooling tower top and the bottom pressure reduction, to the flowing of cooling tower top, by heat exchange filler, completes countercurrent heat-transfer mass transport process with recirculated cooling water, realizes the further cooling of recirculated cooling water; The utility model can be widely used in and adopts in the IGCC power station of cryogenic air separation unit and wet cooling tower or be applied to any occasion that there is cryogenic air separation unit and recirculated cooling water demand; Can effectively reduce circulating cooling coolant-temperature gage, improve exerting oneself of steam turbine, improve generating efficiency.
Description
Technical field
The utility model belongs to reduction IGCC recirculated cooling water temperature techniques field, is specifically related to a kind of device utilizing dirty nitrogen to reduce IGCC circulating cooling coolant-temperature gage.
Background technique
IGCC is advanced power generation system Coal Gasification Technology and Gas-steam Combined Cycle combined, and has higher generating efficiency and good environmental-protecting performance, IGCC subsequent implementation CO
2trapping energy consumption is lower.IGCC is made up of two large divisions, i.e. gasification part and Gas-steam Combined Cycle part.Gasification part capital equipment has gasification oven, space division system, gas purification equipment (comprising sulfur recovery unit) etc.; The capital equipment of Gas-steam Combined Cycle part has gas turbine, exhaust heat boiler, steam turbine etc.The working procedure of IGCC be briefly described as coal in gasification oven with technical grade pure oxygen and water low-heat value gas (mainly CO+H in gasification reaction becomes
2), after purification, the pollutant such as sulphide, nitride, dust in removing crude-gas, make it to become clean gaseous fuel, enter the combustion chambers burn of gas turbine, then high-temperature gas working medium drives combustion gas turbine work done, and combustion turbine exhaustion then enters exhaust heat boiler heated feed water, produces superheated vapor and drives steam turbine work done.
In space division system, air, through processes such as overcompression, deep cooling and rectifying, can obtain technical grade pure oxygen, part high-purity nitrogen, and the dirty nitrogen that purity is not too high.Most nitrogen in space division system finally exist with dirty nitrogen form.This part dirty nitrogen is substantially not moisture, and dirty nitrogen leaves the temperature of space division system also a little less than normal temperature.The space division system in IGCC power station can be divided into empty point of boosting and low pressure sky point, and boosting space division system is usually by dirty nitrogen reinjection gas turbine.And the dirty nitrogen of low pressure space division system is atmospheric pressure state, re-injection gas turbine is by the compression work of at substantial, and efficiency of plant significantly reduces, and common way is that dirty nitrogen is directly emptying.
Reduce turbine back pressure, exerting oneself of steam turbine can be improved, improve generating efficiency.Reducing the most effective way of turbine back pressure is method by reducing sink temperature, namely reduces the temperature of recirculated cooling water.Recirculated cooling water normally in wet cooling tower with atmospheric air direct contact heat transfer, realize cooling.Above-mentioned detailed process is that recirculated cooling water absorbs turbine discharge heat in turbine condenser, and realize turbine discharge condensation, recirculated cooling water heats up simultaneously; Again by recirculated cooling water with spray pattern, spray on the heat exchange filler in cooling tower, filler provides larger surface of contact, by the contact of recirculated cooling water and air, reaches heat transfer effect.The Driving force of heat exchange is the difference of circulating cooling coolant-temperature gage and air ' s wet bulb temperature, show as the enthalpy difference between recirculated cooling water and air, this part enthalpy difference comprises two-part, a part is the temperature difference between air and recirculated cooling water, and another part is that the water vapor concentration between air and recirculated cooling water is poor.The cooling capacity of cooling tower weighs with the difference of circulating cooling coolant-temperature gage and air ' s wet bulb temperature.Wet-bulb temperature is lower, and the temperature after water cooling is also lower, and wet-bulb temperature is the cooling limit temperature of cooling tower.That is, no matter how advanced cooling tower design is, and cooled water all can only in theory close to the wet-bulb temperature of air.
Because dirty nitrogen is substantially water-free medium, its temperature is also a little less than normal temperature, therefore the wet-bulb temperature of dirty nitrogen is significantly lower than the wet-bulb temperature of air, if dirty nitrogen is passed into cooling tower, can effectively reduce circulating cooling coolant-temperature gage, thus reduction turbine back pressure, improve exerting oneself of steam turbine, improve generated output.
Summary of the invention
In order to solve above-mentioned prior art Problems existing, the purpose of this utility model is to provide a kind of device utilizing dirty nitrogen to reduce IGCC circulating cooling coolant-temperature gage, can effectively reduce circulating cooling coolant-temperature gage, improve exerting oneself of steam turbine, improve generating efficiency.
For reaching above object, the utility model adopts following technological scheme:
Utilize dirty nitrogen to reduce the device of IGCC circulating cooling coolant-temperature gage, comprise cooling tower and pass into the pipeline being connected with dirty nitrogen bottom cooling tower, described pipeline is provided with multiple equally distributed distribution nozzle.
Described cooling tower is without the need to transformation or transform, and the described cooling tower transformed increases in addition in the bottom of cooling tower heat exchange filler to have heat exchange filler bottom one deck, described in be connected with dirty nitrogen pipeline incorporate the heat exchange filler bottom, bottom of increase.
Described cooling tower is cooling tower or mechanical draft wet cooling tower.
Compared to the prior art, tool has the following advantages the utility model:
1, in the utility model, dirty nitrogen passes into wet cooling tower, utilizes the feature that dirty nitrogen wet-bulb temperature is low, can effectively reduce circulating cooling coolant-temperature gage, improves exerting oneself of steam turbine, improves generating efficiency.
2, the utility model is for mechanical draft wet cooling tower, because dirty nitrogen wet-bulb temperature is low, can reduce the amount sucking air, reduce blower fan power consumption.
The utility model can be widely used in the IGCC power station adopting cryogenic air separation unit and wet cooling tower, particularly adopts the IGCC power station of low pressure space division system; The utility model can be applied to any occasion that there is cryogenic air separation unit and recirculated cooling water demand equally.
Accompanying drawing explanation
Fig. 1 is that dirty nitrogen passes into cooling tower (without the need to transforming cooling tower).
Fig. 2 is that dirty nitrogen passes into mechanical draft wet cooling tower (without the need to transforming cooling tower).
Fig. 3 is that dirty nitrogen passes into cooling tower (transformation cooling tower).
The dirty nitrogen of Fig. 4 passes into mechanical draft wet cooling tower (transformation cooling tower).
Embodiment
Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.
Embodiment one
As shown in Figure 1, the present embodiment utilizes dirty nitrogen to reduce the device of IGCC circulating cooling coolant-temperature gage, dirty nitrogen passes in the cooling tower without the need to transformation, heat exchange filler 4 bottom bottom cooling tower passes into the pipeline being connected with dirty nitrogen, and pipeline is provided with multiple equally distributed distribution nozzle.Its flow process is: under the effect of cooling tower top and the bottom pressure reduction, and air sucks cooling tower from air inlet 2, upwards flows in cooling tower; The dirty nitrogen that space division system produces is introduced in cooling tower by the dirty nitrogen inlet 7 of pipeline one end, and by distribution nozzle, makes dirty nitrogen be evenly distributed in bottom cooling tower, flow to cooling tower top; Air and dirty nitrogen are by heat exchange filler 4, and the recirculated cooling water sprayed with water distribution system 3 completes countercurrent heat-transfer mass transport process, realizes the cooling of recirculated cooling water.When air and dirty nitrogen are by water deflector 5, under the oarse-grained water droplet carried is stopped, fall after rise to heat exchange filler 4.Final air and dirty nitrogen enter air by cooling tower gas outlet 8.Cooled recirculated cooling water finally falls into water cooling pond 6, then sends in vapour condenser by recirculating water pump, cooling turbine discharge.In figure, 1 is hot water inlet.
Embodiment two
As shown in Figure 2, the present embodiment utilizes dirty nitrogen to reduce the device of IGCC circulating cooling coolant-temperature gage, dirty nitrogen passes into the mechanical draft wet cooling tower without the need to transformation, heat exchange filler 4 bottom bottom mechanical draft wet cooling tower passes into the pipeline being connected with dirty nitrogen, and pipeline is provided with multiple equally distributed distribution nozzle.Its flow process is: under the effect of cooling tower top and the bottom pressure reduction, and air sucks cooling tower from air inlet 2, upwards flows in cooling tower; The dirty nitrogen that space division system produces is introduced in cooling tower by the dirty nitrogen inlet 7 of pipeline one end, and by distribution nozzle, makes dirty nitrogen be evenly distributed in bottom cooling tower, flow to cooling tower top; Air and dirty nitrogen are by heat exchange filler 4, and the recirculated cooling water sprayed with water distribution system 3 completes countercurrent heat-transfer mass transport process, realizes the cooling of recirculated cooling water.When air and dirty nitrogen are by water deflector 5, under the oarse-grained water droplet carried is stopped, fall after rise to heat exchange filler 4.Under the effect of the blower fan 10 that final air and dirty nitrogen drive at motor 11, enter air by cooling tower gas outlet.Cooled recirculated cooling water finally falls into water cooling pond 6, then sends in vapour condenser by cooling water outlet 9, cooling turbine discharge.In figure, 1 is hot water inlet.
Embodiment three
As shown in Figure 3, the present embodiment utilizes dirty nitrogen to reduce the device of IGCC circulating cooling coolant-temperature gage, dirty nitrogen passes into improved cooling tower, this improved cooling tower just increases one deck heat exchange filler bottom cooling tower, namely two-layer heat exchange filler is had in figure, upper strata heat exchange filler 4-1 and lower floor heat exchange filler 4-2, other structure is with Fig. 1 of embodiment one, adopt double-deck heat exchange filler, recirculated cooling water in upper strata heat exchange filler 4-1 after Air flow, drop in lower floor heat exchange filler 4-2, herein with dirty nitrogen heat and mass, compared to the scheme of embodiment 1, the present embodiment can guarantee that circulating cooling coolant-temperature gage is down to lower temperature.
Embodiment four
As shown in Figure 4, the present embodiment utilizes dirty nitrogen to reduce the device of IGCC circulating cooling coolant-temperature gage, dirty nitrogen passes into improved mechanical draft wet cooling tower, this improved mechanical draft wet cooling tower just increases one deck heat exchange filler bottom cooling tower, namely two-layer heat exchange filler is had in figure, upper strata heat exchange filler 4-1 and lower floor heat exchange filler 4-2, other structure is with Fig. 2 of embodiment two, adopt double-deck heat exchange filler, recirculated cooling water in upper strata heat exchange filler 4-1 after Air flow, drop in lower floor heat exchange filler 4-2, herein with dirty nitrogen heat and mass, compared to the scheme of embodiment 2, the present embodiment can guarantee that circulating cooling coolant-temperature gage is down to lower temperature.
Claims (3)
1. utilize dirty nitrogen to reduce the device of IGCC circulating cooling coolant-temperature gage, it is characterized in that: comprise cooling tower and pass into the pipeline being connected with dirty nitrogen bottom cooling tower, described pipeline is provided with multiple equally distributed distribution nozzle.
2. device according to claim 1, it is characterized in that: described cooling tower is without the need to transformation or transform, the described cooling tower transformed increases in addition in the bottom of cooling tower heat exchange filler to have heat exchange filler bottom one deck, described in be connected with dirty nitrogen pipeline pass into the heat exchange filler bottom, bottom of increase.
3. device according to claim 1, is characterized in that: described cooling tower is cooling tower or mechanical draft wet cooling tower.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420478401.3U CN204082340U (en) | 2014-08-22 | 2014-08-22 | Dirty nitrogen is utilized to reduce the device of IGCC circulating cooling coolant-temperature gage |
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| CN201420478401.3U CN204082340U (en) | 2014-08-22 | 2014-08-22 | Dirty nitrogen is utilized to reduce the device of IGCC circulating cooling coolant-temperature gage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213984A (en) * | 2014-08-22 | 2014-12-17 | 中国华能集团清洁能源技术研究院有限公司 | Method and device for reducing IGCC circulating cooling water temperature by using polluted nitrogen |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213984A (en) * | 2014-08-22 | 2014-12-17 | 中国华能集团清洁能源技术研究院有限公司 | Method and device for reducing IGCC circulating cooling water temperature by using polluted nitrogen |
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