CN201344046Y - Dry quenching dual-pressure high-temperature high-pressure cogeneration system - Google Patents
Dry quenching dual-pressure high-temperature high-pressure cogeneration system Download PDFInfo
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- CN201344046Y CN201344046Y CNU2009201174819U CN200920117481U CN201344046Y CN 201344046 Y CN201344046 Y CN 201344046Y CN U2009201174819 U CNU2009201174819 U CN U2009201174819U CN 200920117481 U CN200920117481 U CN 200920117481U CN 201344046 Y CN201344046 Y CN 201344046Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The utility model discloses a dry quenching dual-pressure high-temperature high-pressure cogeneration system, which comprises a dry quenching high-temperature high-pressure steam-gas dual-pressure waste heat boiler, a turboset, a condensing unit and a condensate pump; and the turboset forms a loop with the high-temperature high-pressure steam-gas dual-pressure waste heat boiler through the condensing unit and the condensate pump respectively. The dry quenching dual-pressure high-temperature high-pressure cogeneration system can fully absorb the energy of smoke gas, has higher recovery efficiency of waste heat, and adopts the dual-pressure waste heat boiler and a perfect inert gas recycling system, so that the recovery efficiency of the cogeneration technology reaches the international advanced level.
Description
Technical field
The utility model relates to the two pressure exhaust heat boiler configuration of a kind of efficient dry quenching Turbo-generator Set afterheat generating system, particularly a kind of dry quenching dual pressure high-temperature and high-pressure residual heat power generation system.
Background technique
Coking engineering projects adopts wet quenching, whenever puts out the steam that the red coke of 1t will contain 0.5t a large amount of phenol, cyanogen sulphide and dust and throws to sky, seriously polluted atmosphere and around environment.The environmental pollution problem meaning of administering wet quenching is very great.CDQ utilizes inert gas, in closed system red Jiao is extinguished, and is equipped with good dust removal installation, and is free from environmental pollution.Can produce steam owing to dry quenching simultaneously, and can be used for generating, can avoid of the pollution of the conventional coal-burning boiler of identical scale, and reduce the discharging of CO2 to atmosphere to atmosphere.
Red Jiao's the sensible heat of coming out of the stove accounts for 35%～40% of coke oven energy consumption, and this part energy is equivalent to 5% of coking coal energy.Adopt the red burnt sensible heat of CDQ recyclable about 80%; The coke that CDQ is produced then helps improving coal powder blowing amount to adopting the blast furnace of Coal powder spray technology, and energy-saving effect is more obvious.
CDQ is compared with wet quenching, and CDQ has improved coke quality, makes coke M40 improve 3%～8%, and M10 improves 0.3%～0.8%; Improved the uniformity of lumpiness; Reduced the reactivity of coke.This is to reducing ironmaking cost, and it is very favourable to improve pig iron output.
This shows, dry quenching high temperature inert recycle gas is reclaimed the superheated vapor that heat produces by exhaust heat boiler, be used for the Turbo-generator Set generating, not only saved the energy, reduced energy consumption, reduce the discharge amount of greenhouse gases, also can effectively improve the ambient air quality of coking plant area, obvious environment benefit.
According at present domestic and international technology, the pattern of dry coke quenching residual heat boiler has: single pressure, single pressure+flash distillation, and single exhaust heat boiler configuration Turbo-generator Set of pressing is adopted in dry quenching cogeneration mostly, its characteristics are: single exhaust heat boiler configuration Turbo-generator Set of pressing, exhaust heat boiler temperature of exhaust fume height (about 165 ℃), and need the external world that the deoxygenation low pressure steam is provided, dry quenching UTILIZATION OF VESIDUAL HEAT IN efficient is low, the cost of electricity-generating height.
Summary of the invention
The purpose of this utility model is to provide for the deficiency that solves above-mentioned technology to have higher heat recovery efficient, under the prerequisite that does not influence former dry quenching technological process, can guarantee that Turbo-generator Set adapts to the dry quenching dual pressure high-temperature and high-pressure residual heat power generation system of the operating mode of dry coke quenching residual heat boiler.
In order to achieve the above object, a kind of dry quenching dual pressure high-temperature and high-pressure residual heat power generation system that the utility model is designed, comprise the two pressure exhaust heat boilers of dry quenching high-temperature high-pressure overheat steam, Turbo-generator Set, condensation device and condensate pump, the two pressure exhaust heat boilers of described dry quenching high-temperature high-pressure overheat steam comprise: low-pressure coal saver, higher-pressure deaerator, low pressure drum, low pressure evaporator, high-pressure economizer, high pressure drum, high pressure extended surface tube vaporizer, high pressure light pipe vaporizer, high pressure low temperature superheater, desuperheater, high pressure-temperature superheater; Described Turbo-generator Set comprises steam turbine, generator; Described condensation device is condenser, cooling tower, circulating water pump composition closed cycle; Condenser is connected with low-pressure coal saver by condensate pump, low-pressure coal saver is connected with higher-pressure deaerator with the pipeline that has valve, higher-pressure deaerator directly is connected with the low pressure drum, the low pressure drum passes through high pressure water pump, high-pressure economizer is connected with the high pressure drum, the high pressure drum is connected with the high pressure low temperature superheater by steam-water separator, the high pressure low temperature superheater is connected with the high pressure-temperature superheater by desuperheater, the high pressure-temperature superheater directly is connected with Turbo-generator Set by the pipeline that has valve, and Turbo-generator Set is passed through condensation device respectively, condensate pump, form the loop with the two pressure exhaust heat boilers of high-temperature high-pressure overheat steam.
Before and after described condensate pump, can be serially connected with valve, condenser by pipeline be connected with low-pressure coal saver again after the valvular condensate pump of the serial connection of two groups of parallel connections is connected.
Described low-pressure coal saver can be provided with the adjusting bypass.
Described low pressure drum can be connected with low pressure evaporator with asending pipe by falling tube; Described high pressure drum can be connected with high pressure light pipe vaporizer, high pressure extended surface tube vaporizer respectively with asending pipe by falling tube.
Described higher-pressure deaerator and high pressure water pump form circulation loop.
Described sweet-water tank is connected with condenser by the demineralized water small pump; Described sweet-water tank can be connected with condenser by the pipeline that has valve.
The utility model adopts the two pressure exhaust heat boiler configuration of dry quenching high-temperature high-pressure overheat steam Turbo-generator Set, the temperature of exhaust fume of the heat boiler outlet of its afterheat generating system is below 145 ℃, cancel the heat pipe heat exchanger of former dry quenching flue gas system, this power generation system is owing to adopt two pressure exhaust heat boilers simultaneously, boiler carries oxygen-eliminating device, cancel the deaerated feedwater pumping plant of former dry quenching afterheat generating system, do not need the external world that deoxygenation steam is provided, deoxygenation is provided by the exhaust heat boiler low pressure evaporator with vapour.
The dry quenching dual pressure high-temperature and high-pressure residual heat power generation system that the utility model provides does not need to consume any fossil fuel, helps the realization of Sustainable Development of Enterprises target, reduces the local SO that is brought by conventional thermal power plant
2, NO
X, dust and so on atmospheric pollutant.
The dry quenching dual pressure high-temperature and high-pressure residual heat power generation system that the utility model provides, can fully absorb the energy of flue gas, has higher heat recovery efficient, adopt two pressure exhaust heat boilers, add and adopt perfect inert gas recirculating system, the heat recovery efficient of this exhaust heat recovery power generation technology is reached advanced world standards.
One tame iron and steel enterprise adopts 75t/h dry coke quenching auxiliary inertia recycle gas exhaust heat recovery power generation, the effect of energy-saving and emission-reduction: not only do not need to consume any fossil fuel, also will produce 289800 tons/year of steam, through steam turbine power generation, the electric power that produces uses for the coke-oven plant, so, and with regard to alternative corresponding coal-fired steam boiler, can save about 26904 tons/year of standard coal consumption every year, thereby reduce SO
2(the coal sulfur-bearing is by 0.6%) discharge amount is about 322.8 tons/year, reduces smoke discharge amount and is about 1656 tons/year, reduces the NOx discharge amount and is about 275 tons/year, reduces CO
2Discharge amount is about 66304 tons/year, and the whole nation has numerous iron and steel enterprises, all adopt the effect of its energy-saving and emission-reduction of present technique will amplify more than tens times, hence one can see that, dry quenching has not only been saved the energy, has reduced energy consumption, has reduced the discharge amount of greenhouse gases, also can effectively improve the ambient air quality of coking plant area, obvious environment benefit.The two afterheat generating systems of pressing of efficient dry quenching are promoted in the whole nation, and its economic benefit, social benefit, environmental benefit are huge.
Description of drawings
Fig. 1 is the utility model dry quenching dual pressure high-temperature and high-pressure residual heat power generation system structural representation;
Fig. 2 is the high-pressure section structural representation of the two pressure exhaust heat boilers of dry quenching high-temperature high-pressure overheat steam;
Fig. 3 is the low-pressure section structural representation of the two pressure exhaust heat boilers of dry quenching high-temperature high-pressure overheat steam.
Wherein: steam turbine 1, generator 2, condenser 3, condensate pump 4, low-pressure coal saver 5, higher-pressure deaerator 6, low pressure drum 7, low pressure evaporator 8, high pressure water pump 9, high-pressure economizer 10, high pressure drum 11, high pressure extended surface tube vaporizer 12, high pressure light pipe vaporizer 13, high pressure low temperature superheater 14, desuperheater 15, high pressure-temperature superheater 16, low-pressure section combined muffler 17, high-pressure section combined muffler 18, two grade cooling towers 19, recirculated cooling water pump 20, sweet-water tank 21, demineralized water small pump 22, regulate bypass 23.
Embodiment
In conjunction with the accompanying drawings the utility model patent is further described below by embodiment.
Embodiment 1
As shown in Figure 1, a kind of dry quenching dual pressure high-temperature and high-pressure residual heat power generation system that present embodiment provides, comprise the two pressure exhaust heat boilers of dry quenching high-temperature high-pressure overheat steam, Turbo-generator Set, condensation device and condensate pump 4 is characterized in that: the two pressure exhaust heat boilers of described dry quenching high-temperature high-pressure overheat steam comprise: low-pressure coal saver 5, higher-pressure deaerator 6, low pressure drum 7, low pressure evaporator 8, high-pressure economizer 10, high pressure drum 11, high pressure extended surface tube vaporizer 12, high pressure light pipe vaporizer 13, high pressure low temperature superheater 14, desuperheater 15, high pressure-temperature superheater 16; Described Turbo-generator Set comprises steam turbine 1, generator 2; Described condensation device is condenser 3, cooling tower 19, circulating water pump 20 composition closed cycles; Condenser 3 is connected with low-pressure coal saver 5 by condensate pump 4, low-pressure coal saver 5 is connected with higher-pressure deaerator 6 with the pipeline that has valve, higher-pressure deaerator 6 directly is connected with low pressure drum 7, low pressure drum 7 is by high pressure water pump 9, high-pressure economizer 10 is connected with high pressure drum 11, high pressure drum 11 is connected with high pressure low temperature superheater 14 by steam-water separator, high pressure low temperature superheater 14 is connected with high pressure-temperature superheater 16 by desuperheater 15, high pressure-temperature superheater 16 directly is connected with Turbo-generator Set by the pipeline that has valve, and Turbo-generator Set is passed through condensation device respectively, condensate pump 4, form the loop with the two pressure exhaust heat boilers of high-temperature high-pressure overheat steam.Described condensate pump 4 tandem connections have valve, and condenser 3 is connected with low-pressure coal saver 5 after being connected by the valvular condensate pump 4 of the pipeline and the serial connection of two groups of parallel connections again.Described low-pressure coal saver 5 is provided with regulates bypass 23.Described low pressure drum 7 is connected with low pressure evaporator 8 with asending pipe by falling tube; Described high pressure drum 11 is connected with high pressure light pipe vaporizer 13, high pressure extended surface tube vaporizer 12 respectively with asending pipe by falling tube.Described higher-pressure deaerator 6 forms circulation loop with high pressure water pump 9.Described sweet-water tank 21 is connected with condenser 3 by demineralized water small pump 22.
Steam turbine 1 is connected with generator 2, steam turbine 1 respectively with condenser 3, low-pressure coal saver 5 connects, low pressure evaporator 8 is connected with low pressure drum 7 by pipeline provides higher-pressure deaerator 7 required deoxygenation steam, high pressure drum 11 is by pipeline and high pressure extended surface tube vaporizer 12, high pressure light pipe vaporizer 13 connects provides high-pressure saturated steam, high pressure drum 11, high pressure-temperature superheater 16 outlet conduits are connected higher-pressure deaerator 6 by the pipeline that has safety valve with high-pressure section combined muffler 18, low pressure drum 7 is connected with low-pressure section combined muffler 17 by the pipeline that has safety valve.
As Fig. 2, shown in Figure 3, be example with the 140t/h dry coke quenching auxiliary, be about 850～950 ℃ from the dried temperature of putting out the thermal cycle gas that fire grate goes out, flow is about 183322Nm
3/ h, after the disposable dust remover dedusting, pass through high pressure-temperature superheater 16, high pressure low temperature superheater 14, high pressure light pipe vaporizer 13, high pressure extended surface tube vaporizer 12, high-pressure economizer 10, low pressure evaporator 8, low-pressure coal saver 5 heat exchange successively, temperature is reduced to 135～140 ℃, the cold recycle gas that comes out from low-pressure coal saver 5 recycles by entering the dried stove that puts out after the circulating fan pressurization after the dedusting of dry quenching special dust seperator.
During work, two pressure exhaust heat boiler high pressure-temperature superheater 16 outlets produce high temperature and high pressure steam (pressure 9.81MPa (g), 540 ℃ of temperature, flow 68t/h) and promote the Turbo-generator Set generating, the steam turbine water of condensation is delivered to low-pressure coal saver 5 behind condenser 3, condensate pump 4, go to enter low pressure drum 7 after higher-pressure deaerator 6 deoxygenations after absorbing certain heat, the water of low pressure drum 7 removes low pressure evaporator 8 through falling tube, get back to low pressure drum 7 by the low pressure asending pipe again, remove high pressure water pump 9 by the saturation water after the high pressure deoxygenation, high-pressure economizer 10 is supplied with in the back of boosting.High-pressure feed water enters pressure kettle tube 11 after heating in high-pressure economizer 10, the water of high pressure drum 11 by the heating of high pressure light pipe vaporizer 13, high pressure extended surface tube vaporizer 12 natural cycle systems after, become steam water interface after, send high pressure drum 11 again back to.Steam water interface carries out carbonated drink separation in high pressure drum 11, saturated vapour is sent to high pressure low temperature superheater 14, and the water that is separated falls into high pressure drum 11 as stove water, offers the circulatory system once more.
Saturated vapour removes desuperheater 15 after overheated in high pressure low temperature superheater 14, to desuperheater 15 water sprays, make high pressure superheated steam reach setting temperature.
It is further overheated that the superheated vapor of process desuperheat carries out in high pressure-temperature superheater 16, reaches the high pressure steam of setting temperature, is sent to steam turbine 1 as generating with steam, finishes a cyclic process.
The demineralized water that comes from desalted water station enters sweet-water tank 21, mends behind condenser 3 throat's deaeration in condensers as boiler feedwater by demineralized water small pump 22.
Claims (10)
1, a kind of dry quenching dual pressure high-temperature and high-pressure residual heat power generation system, comprise the two pressure exhaust heat boilers of dry quenching high-temperature high-pressure overheat steam, Turbo-generator Set, condensation device and condensate pump (4) is characterized in that: the two pressure exhaust heat boilers of described dry quenching high-temperature high-pressure overheat steam comprise: low-pressure coal saver (5), higher-pressure deaerator (6), low pressure drum (7), low pressure evaporator (8), high-pressure economizer (10), high pressure drum (11), high pressure extended surface tube vaporizer (12), high pressure light pipe vaporizer (13), high pressure low temperature superheater (14), desuperheater (15), high pressure-temperature superheater (16); Described Turbo-generator Set comprises steam turbine (1), generator (2); Described condensation device is condenser (3), cooling tower (19), circulating water pump (20) composition closed cycle; Condenser (3) is connected with low-pressure coal saver (5) by condensate pump (4), low-pressure coal saver (5) is connected with higher-pressure deaerator (6) with the pipeline that has valve, higher-pressure deaerator (6) directly is connected with low pressure drum (7), low pressure drum (7) is by high pressure water pump (9), high-pressure economizer (10) is connected with high pressure drum (11), high pressure drum (11) is connected with high pressure low temperature superheater (14) by steam-water separator, high pressure low temperature superheater (14) is connected with high pressure-temperature superheater (16) by desuperheater (15), high pressure-temperature superheater (16) directly is connected with Turbo-generator Set by the pipeline that has valve, and Turbo-generator Set is passed through condensation device respectively, condensate pump (4), form the loop with the two pressure exhaust heat boilers of high-temperature high-pressure overheat steam.
2, dry quenching dual pressure high-temperature and high-pressure residual heat power generation system according to claim 1, it is characterized in that valve being arranged at described condensate pump (4) tandem connection, condenser (3) by pipeline be connected with low-pressure coal saver (5) again after the valvular condensate pump of the serial connection of two groups of parallel connections (4) is connected.
3, dry quenching dual pressure high-temperature and high-pressure residual heat power generation system according to claim 1 and 2 is characterized in that: described low-pressure coal saver (5) is provided with regulates bypass (23).
4, dry quenching dual pressure high-temperature and high-pressure residual heat power generation system according to claim 1 and 2 is characterized in that: described low pressure drum (7) is connected with low pressure evaporator (8) with asending pipe by falling tube; Described high pressure drum (11) is connected with high pressure light pipe vaporizer (13), high pressure extended surface tube vaporizer (12) respectively with asending pipe by falling tube.
5, dry quenching dual pressure high-temperature and high-pressure residual heat power generation system according to claim 3 is characterized in that: described low pressure drum (7) is connected with low pressure evaporator (8) with asending pipe by falling tube; Described high pressure drum (11) is connected with high pressure light pipe vaporizer (13), high pressure extended surface tube vaporizer (12) respectively with asending pipe by falling tube.
6, dry quenching dual pressure high-temperature and high-pressure residual heat power generation system according to claim 1 and 2 is characterized in that: described higher-pressure deaerator (6) forms circulation loop with high pressure water pump (9).
7, dry quenching dual pressure high-temperature and high-pressure residual heat power generation system according to claim 5 is characterized in that: described higher-pressure deaerator (6) forms circulation loop with high pressure water pump (9).
8, dry quenching dual pressure high-temperature and high-pressure residual heat power generation system according to claim 1 and 2 is characterized in that: described sweet-water tank (21) is connected with condenser (3) by demineralized water small pump (22).
9, dry quenching dual pressure high-temperature and high-pressure residual heat power generation system according to claim 6 is characterized in that: described sweet-water tank (21) is connected with condenser (3) by demineralized water small pump (22).
10, dry quenching dual pressure high-temperature and high-pressure residual heat power generation system according to claim 7 is characterized in that: described sweet-water tank (21) is connected with condenser (3) by demineralized water small pump (22).
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|---|---|---|---|
| CNU2009201174819U CN201344046Y (en) | 2009-04-13 | 2009-04-13 | Dry quenching dual-pressure high-temperature high-pressure cogeneration system |
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| CNU2009201174819U CN201344046Y (en) | 2009-04-13 | 2009-04-13 | Dry quenching dual-pressure high-temperature high-pressure cogeneration system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102816574A (en) * | 2012-08-31 | 2012-12-12 | 上海宝钢节能技术有限公司 | Device for generating electricity from waste heat of raw coke oven gas |
| CN103604310A (en) * | 2013-11-28 | 2014-02-26 | 天津百思特环保能源开发有限公司 | Device for recovering and storing intermittent steam |
-
2009
- 2009-04-13 CN CNU2009201174819U patent/CN201344046Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102816574A (en) * | 2012-08-31 | 2012-12-12 | 上海宝钢节能技术有限公司 | Device for generating electricity from waste heat of raw coke oven gas |
| CN103604310A (en) * | 2013-11-28 | 2014-02-26 | 天津百思特环保能源开发有限公司 | Device for recovering and storing intermittent steam |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091111 Termination date: 20180413 |