CN109931626A - A kind of synergy emission reduction device for the power station IGCC combustion engine - Google Patents
A kind of synergy emission reduction device for the power station IGCC combustion engine Download PDFInfo
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- CN109931626A CN109931626A CN201811436993.1A CN201811436993A CN109931626A CN 109931626 A CN109931626 A CN 109931626A CN 201811436993 A CN201811436993 A CN 201811436993A CN 109931626 A CN109931626 A CN 109931626A
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- combustion engine
- power station
- dirty nitrogen
- cooling tower
- exchange system
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 53
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 95
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 45
- 238000001816 cooling Methods 0.000 claims abstract description 39
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 230000008676 import Effects 0.000 claims 2
- 239000000446 fuel Substances 0.000 abstract description 15
- 238000010248 power generation Methods 0.000 abstract description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 6
- 239000001301 oxygen Substances 0.000 abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 206010020843 Hyperthermia Diseases 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 238000002309 gasification Methods 0.000 description 4
- 230000036031 hyperthermia Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
A kind of synergy emission reduction device for the power station IGCC combustion engine provided by the invention, including dirty nitrogen collection device and circulating heat exchange system, wherein, dirty nitrogen collection device is mounted on the combustion engine air separation unit dirt nitrogen pipeline of the power station IGCC, and the outlet of dirty nitrogen collection device is connect by cycle heat exchange system with the compressor inlet in the combustion engine of the power station IGCC；Circulating heat exchange system includes cooling tower, and the air inlet of the cooling tower is connect with the outlet of dirty nitrogen collection device, and the dirty nitrogen gas outlet after cooling down in cooling tower is connect with combustion engine compressor inlet；The present invention reduces the indoor local maximum temperature of burning by reducing the content of burning indoor oxygen, and mean temperature is basically unchanged, so that the NOx discharge of fuel engine power generation system significantly reduces；Meanwhile by reducing the intake air temperature of combustion engine compressor using dirty nitrogen circulation heat-exchange system, and then improve the generating efficiency of fuel engine power generation system.
Description
Technical field
The present invention relates to the power station IGCC fields, and in particular to a kind of synergy emission reduction device for the power station IGCC combustion engine.
Background technique
The power station IGCC, i.e. integrated gasification combined cycle for power generation system, are to follow Coal Gasification Technology and gas-steam combined
The advanced electricity generation system that ring combines, existing higher generating efficiency, and have fabulous environmental-protecting performance, it is a kind of promising
Clean Coal Power Generating Technologies.The power station IGCC is mainly by air separation unit, gasification burner, purified synthesis gas device, fuel engine power generation system, remaining
Heat boiler and turbine generating system composition.
In air separation unit, air can obtain pure oxygen, purity nitrogen product, pure oxygen through processes such as overcompression, cooling and rectifying
Gas is used for coal gasification, and pure nitrogen gas there remains for pulverized coal conveying and purging pipeline and be about as much as 1/4 air separation unit air inflow
Dirty nitrogen.This part dirt nitrogen gas component is the N of 96% (volume fraction)2, 2% O2With 2% Ar, pressure about 112Kpa
(A), and it is entirely free of moisture, in addition to small part is for other than purging the purification system of air separation unit, remaining directly to arrange Xiang great Qi.It is empty
Separating device is a kind of great energy waste by extra dirty nitrogen purge.
The temperature of atmosphere has large effect to the power and efficiency of fuel engine power generation system, and in general, atmospheric temperature is every
Increase by 10 DEG C, the power of combustion engine will decline 5%, and efficiency will decline 0.1%.
For burner, main three kinds of the formation mechanism of NOx, be fuel type NOx, Quick-type NOx and heat respectively
Power type NOx.The NOx of gas turbine engine systems flue gas emission is mainly thermal NO x.When local temperature is high in gas turbine combustion
When 1800K, thermal NO x generating rate is in exponential increase, and influence of the excess air coefficient to thermal NO x is also
Obviously, thermal NO x production quantity is directly proportional to the square root of oxygen concentration, i.e. the concentration of oxygen is bigger, and thermal NO x also can
Increase therewith.For certain combustion apparatus, in order to reduce the generation of thermal NO x, common method is exactly that a part is burnt
The flue gas of generation carries out circulation and is introduced into combustion chamber simultaneously with air and fuel.It is indoor oxygen-containing that its principle is reduction of burning
Amount, to reduce localized hyperthermia's temperature.
Since fuel engine power generation amount can be improved in known reduction burning machine inlet temperature, while reducing the indoor air of combustion engine burning
Oxygen content can reduce localized hyperthermia's temperature, to reduce the NOx discharge of combustion engine.
Summary of the invention
The purpose of the present invention is to provide a kind of synergy emission reduction devices for the power station IGCC combustion engine, solve existing dirt
The problem of nitrogen is emptied, and the waste of the energy is caused.
In order to achieve the above object, the technical solution adopted by the present invention is that:
A kind of synergy emission reduction device for the power station IGCC combustion engine provided by the invention, including dirty nitrogen collection device and follow
Ring heat-exchange system, wherein dirty nitrogen collection device is mounted on the combustion engine air separation unit dirt nitrogen pipeline of the power station IGCC, and dirty nitrogen is received
The outlet of acquisition means is connect by circulating heat exchange system with the compressor inlet in the combustion engine of the power station IGCC；
Circulating heat exchange system includes cooling tower, and the air inlet of the cooling tower is connect with the outlet of dirty nitrogen collection device,
Dirty nitrogen gas outlet after cooling down in cooling tower is connect with compressor inlet.
Preferably, circulating heat exchange system further includes water pump, the water outlet of the water pump be arranged in cooling tower upper end into
Mouth of a river connection.
Preferably, the heat-exchange system for cooling air is additionally provided in the admission line of compressor.
Preferably, heat-exchange system includes heat exchanger, and the air inlet of the heat exchanger is connect with the admission line of combustion engine system,
Air outlet slit after cooling down in heat exchanger is communicated with the dirty nitrogen pipeline after cooling.
Preferably, the water inlet of heat exchanger is communicated with the water outlet of cooling tower；The water inlet of the water outlet and water pump of heat exchanger
Mouth communicates.
Preferably, the collection device of dirty nitrogen is blower.
Compared with prior art, the beneficial effects of the present invention are:
A kind of synergy emission reduction device for the power station IGCC combustion engine provided by the invention, the dirty nitrogen that will be discharged in air separation unit
After gas is collected and is cooled down, be sent in combustion chamber by compressor, be passed through the indoor air of burning and fuel into
Row mixing thereby reduces the indoor local maximum temperature of burning reducing the content of burning indoor oxygen, and mean temperature
It is basically unchanged, so that the NOx discharge of fuel engine power generation system significantly reduces；Meanwhile passing through circulating heat exchange system pair
The air inlet of compressor cools down, and then improves the generating efficiency of fuel engine power generation system.
Further, by the circulation of cooling water between water pump and heat exchanger, the temperature of compressor inlet air is reduced,
And then improve the generating efficiency of fuel engine power generation system；Meanwhile improving the reasonable utilization rate of resource.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of synergy emission reduction device of the present invention；
Fig. 2 is the relationship of dirty nitrogen reinjection rate Yu combustion engine Nox discharge amount；
Wherein, 1, dirty nitrogen pipeline 2, blower 3, admission line 4, heat exchanger 5, water pump 6, cooling tower 7, compressor
8, turbine 9, exhaust piping 10, fuel 11, combustion chamber.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, a kind of synergy emission reduction device for the power station IGCC combustion engine provided by the invention, including it is mounted on dirt
Blower 2 on nitrogen pipeline 1, the outlet of the blower 2 be connected in turn circulating heat exchange system, compressor 7, combustion chamber 11, thoroughly
Put down 8 and generator 12, wherein circulating heat exchange system includes heat exchanger 4, water pump 5 and cooling tower 6, the outlet and cooling of blower 2
The air inlet of 6 bottom of tower connects, and the water outlet of water pump 5 is connect with the water inlet of 6 upper end of cooling tower, and dirty nitrogen is in water cooling tower 6
It is inside mixed from bottom to top with the water drop contact sprayed in cooling tower 6, thereby reduces the temperature of the water and dirty nitrogen in cooling tower；
The water inlet of water pump 2 is connect with the water outlet of heat exchanger 4, and the water inlet of heat exchanger 4 is connect with the water outlet of cooling tower 6.
Meanwhile the gas outlet of cooling tower 6 is connect with the air inlet of compressor 7；Combustion engine air, which enters in heat exchanger 4, to be dropped
Temperature, combustion engine air and dirty nitrogen after cooling after cooling are mixed into compressor 7.
The device is first collected the dirty nitrogen for being discharged air separation unit using dirty nitrogen pipeline and blower 2, dirty nitrogen
Mostly come from the summation of the dirty nitrogen of air separation unit purification system discharge and the dirty nitrogen of emptying.
Dirty nitrogen after collection is admitted to the bottom of cooling tower 6, mixes from bottom to top with the water drop contact sprayed in cooling tower 6
It closes.Since dirty nitrogen is extremely dry, water content zero, so during with water drop contact, part water droplet can evaporate to
A large amount of heat is absorbed, so that the temperature of water droplet and dirty nitrogen reduces；It, can be by water temperature by 30 according to the experience of air separation unit water-cooling tower
DEG C it is down to 15 DEG C or so.
The admission line 3 of combustion engine system is connected to heat exchanger 4, and temperature reduces after air and heat exchanger 4 exchange heat, that is, reduces combustion
The intake air temperature of machine system.The relationship of intake air temperature and fuel engine power generation amount and efficiency is shown in Table 1.
In summer, atmospheric temperature is higher, such as 30 DEG C, and combustion engine intake air temperature can be reduced to about 15 DEG C by heat exchanger
Left and right, then according to table 1, the power of combustion engine will increase by 6%, and efficiency will increase by 0.8%；
In winter, since atmospheric temperature is relatively low, while water is easy to freeze, then can be by cooling tower 6, water pump
5 and heat exchanger 4 form water circulation heat exchange device water emptying, i.e., winter when, deactivate cycle heat exchange device:
Table 1
After dirty nitrogen is exchanged heat by cooling tower 6, self-temperature also has certain reduction, then in burning machine inlet pipeline 3
Air mixing, the main mesh of mixing are to reduce indoor NOx discharge of burning.
The NOx of known gas turbine engine systems flue gas emission mostlys come from combustion chamber, and the formation mechanism of NOx is mainly
Thermal NO x.Known heating power type mechanism includes following two chain reaction:
O+N2→NO+N N.1
N+O2→NO+O N.2
The activation energy of reaction N.1 is quite big (319050kJ/kmol), i.e. this reaction and temperature has very strong relationship.Make
For the estimation of an experience, when temperature is lower than 1800K, heating power type mechanism is usually unessential, but when part in burning
When temperature is higher than 1800K, thermal NO x generating rate is in exponential increase.
The fuel used power station IGCC Middle combustion engine is hydrogen-rich synthetic gas fuel 10, and combustion system uses diffusion combustion side substantially
Formula.Dirty nitrogen is mixed with air into combustion chamber 11 and synthesis gas 10 and is burnt, O in air is reduced2Content, to drop
Localized hyperthermia's temperature in low combustion chamber 11, then reduce the Nox discharge amount in combustion engine waste gas 9；The high temperature that combustion chamber 11 generates
Flue gas drives the acting of turbine 8 and driven generator 12.
As shown in Fig. 2, for the relationship of dirty nitrogen reinjection rate and combustion engine Nox discharge amount, wherein dirty nitrogen reinjection rate is dirty nitrogen
The discharge amount of NOx when re-injection rate about 5%, can be reduced by 10% according to calculated result by the volume of gas and the percentage of volume of air
Left and right.According to the operation data of certain IGCC plant, the combustion engine of 170MW at full capacity when air air inflow about 522kg/s, air separation unit
Dirty nitrogen quantity about 28.5kg/s.It, can be by localized hyperthermia's temperature of combustion chamber according to calculating then when operating condition is run combustion engine at full capacity
About 50 DEG C are reduced, the discharge of NOx can be reduced 10mg/m3Left and right；It can reduce about 15 DEG C of intake air temperature of compressor 7 simultaneously,
According to table 1, generated energy about 10MW ideally can be improved.So the device can not only improve the power station IGCC combustion engine system
The efficiency and generated energy of system, and can reduce the discharge amount of its NOx.
Claims (6)
1. a kind of synergy emission reduction device for the power station IGCC combustion engine, it is characterised in that, including dirty nitrogen collection device and circulation
Heat-exchange system, wherein dirty nitrogen collection device is mounted on the power station IGCC combustion engine air separation unit dirt nitrogen pipeline (1), dirty nitrogen
The outlet of collection device is connect by circulating heat exchange system with the import of the compressor (7) in the combustion engine of the power station IGCC；
Circulating heat exchange system includes cooling tower (6), and the outlet of the air inlet of the cooling tower (6) and dirty nitrogen collection device connects
It connects, the dirty nitrogen gas outlet in cooling tower (6) after cooling is connect with the import of compressor (7).
2. a kind of synergy emission reduction device for the power station IGCC combustion engine according to claim 1, it is characterised in that, circulating picture-changing
Hot systems further include water pump (5), and water inlet of the water outlet of the water pump (5) with setting in cooling tower (6) upper end is connect.
3. a kind of synergy emission reduction device for the power station IGCC combustion engine according to claim 2, which is characterized in that compressor
(7) heat-exchange system for cooling air is provided in admission line (3).
4. a kind of synergy emission reduction device for the power station IGCC combustion engine according to claim 3, it is characterised in that, heat exchange system
System includes heat exchanger (4), and the air inlet of the heat exchanger (4) is connect with the admission line (3) of combustion engine system, in heat exchanger (4)
Air outlet slit after cooling is communicated with the dirty nitrogen pipeline after cooling.
5. a kind of synergy emission reduction device for the power station IGCC combustion engine according to claim 4, it is characterised in that, heat exchanger
(4) water inlet is communicated with the water outlet of cooling tower (6)；The water outlet of heat exchanger (4) is communicated with the water inlet of water pump (5).
6. a kind of synergy emission reduction device for the power station IGCC combustion engine according to claim 1, which is characterized in that dirty nitrogen
Collection device be blower (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811436993.1A CN109931626A (en) | 2018-11-28 | 2018-11-28 | A kind of synergy emission reduction device for the power station IGCC combustion engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811436993.1A CN109931626A (en) | 2018-11-28 | 2018-11-28 | A kind of synergy emission reduction device for the power station IGCC combustion engine |
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| CN201811436993.1A Pending CN109931626A (en) | 2018-11-28 | 2018-11-28 | A kind of synergy emission reduction device for the power station IGCC combustion engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520232A (en) * | 2020-06-01 | 2020-08-11 | 国电环境保护研究院有限公司 | Energy-saving gas turbine NOxEmission reduction system and emission reduction method |
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