CN201991580U - Flue gas waste heat power generating system comprising ammonia steam turbine - Google Patents

Flue gas waste heat power generating system comprising ammonia steam turbine Download PDF

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Publication number
CN201991580U
CN201991580U CN2011200676798U CN201120067679U CN201991580U CN 201991580 U CN201991580 U CN 201991580U CN 2011200676798 U CN2011200676798 U CN 2011200676798U CN 201120067679 U CN201120067679 U CN 201120067679U CN 201991580 U CN201991580 U CN 201991580U
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ammonia
steam turbine
flue gas
ammonia water
storage tank
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Expired - Lifetime
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CN2011200676798U
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唐茂平
陈卫国
田蓉荣
李陆伟
余静
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Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The utility model discloses a flue gas waste heat power generating system comprising an ammonia steam turbine, which is characterized by comprising an ammonia water-smoke heat exchanger, an ammonia steam turbine, a generator, an injection pump, a strong ammonia water storage tank, a dilute ammonia water storage tank and two ammonia water pressure boosting pumps. The ammonia water-smoke heat exchanger is arranged in a flue, ammonia water is subjected to heating, evaporation and gas and liquid separation in the heat exchanger, dilute ammonia water in the dilute ammonia water storage tank is delivered to the injection pump via a dilute ammonia water pressure boosting pump pipeline to condense and absorb ammonia from an exhaust pipe of the ammonia steam turbine, simultaneously, vacuum is formed in an ammonia steam turbine system, and the ammonia steam turbine converts kinetic energy and thermal energy of the ammonia into mechanical energy so as to drive the generator to generate power. The power generation system of the smoke waste heat ammonia steam turbine can sufficiently utilize thermal energy of exhausted smoke and reduces thermal emission to the atmosphere. After the temperature of smoke at an inlet of a desulfuration absorbing tower is reduced, the quantity of evaporated water in the absorbing tower is reduced, water consumption of desulfuration process is saved correspondingly, and the purpose of saving water can be realized.

Description

Fume afterheat ammonia turbine generating system
Technical field
The utility model relates to power generation system, especially a kind of fume afterheat ammonia turbine generating system.
Background technique
Flue gas loss is a most important thermal loss in the boiler operatiopn, all there is the situation above design load in a lot of exhaust gas temperatures of Power Plant in China, to the exhaust gas temperature design load of burning anthracite, meager coal, bituminous coal usually about 120~125 ℃, its temperature of exhaust fume design load of boiler of burning brown coal is usually about 155 ℃, and exhaust gas volumn is very big, can reach 370~4,000,000 m usually to separate unit 600MW unit induced draught fan outlet exhaust gas volumn 3/ h.In order to reduce flue gas loss, reduce temperature of exhaust fume, energy saving, improve the Economy of power plant, have at present and adopt low-level (stack-gas) economizer to manage to improve the situation of the utilization ratio of high-temperature flue gas, Fig. 1 is that the system of low-level (stack-gas) economizer connects signal, from certain low-pressure heater extension or whole condensed water, is sent to low-level (stack-gas) economizer usually.
Thermal power plant's ammoniacal liquor----flue gas heat exchange device arrangement:
The arrangement of ammonia as shown in Figure 3,----flue gas heat exchange device (hereinafter to be referred as the flue gas heat exchange device) has two kinds of selections: after scheme one is arranged in air preheater, before the electric cleaner; After scheme two is arranged in induced draught fan, before the desulfurizer.
Prior art: scheme one: after being arranged in air preheater, before the electric cleaner
Many large thermal power plants of Japan, all there are similar arrangements in that jade-like stone power plant (1000MW) of land as usual and Tomato-Atsuma power plant (700MW) etc.The GGH flue gas heat release section of tubular type is arranged between air preheater and the deduster.Tubular type GGH is reduced to flue-gas temperature about 90 ℃, and adopts low low temperature electric precipitator.So-called low cold precipitator is meant that entrance flue gas temperature is at the deduster below 100 ℃.To this kind of this engineering arrangement, in view of present domestic situation,, to reduce risks for reducing the possibility of flue gas heat exchange device corrosion, suggestion flue gas heat exchange device outlet cigarette temperature is higher than above 5 ℃ of flue gas acid dew point.
The risk of this arrangement maximum is burn into dust stratification, wearing and tearing.Flue gas heat exchange device outlet cigarette temperature more than the flue gas flue gas acid dew point 5 ℃ will be hanged down 3~4 ℃ through inlet flue gas temperature behind the induced draught fan behind flue, the deduster, near acid dew point, to all flues, induced draught fan will be considered the anti-low-temperature corrosion measure behind the flue gas heat exchange device.Flue gas heat exchange device outlet flue gas running temperature is a little more than acid dew-point temperature, through flue before the deduster and deduster, in deduster tail flue gas temperature also near acid dew point, harm to the electric cleaner maximum is metal constructions such as long-pending dew of flue gas and corrosion electric cleaner housing, the long-pending dew of electroceramics spare (insulator, porcelain axle) is creepage and then discharge smashes, the generation accident influences the safe operation and the life-span of electric cleaner.Therefore in the time of before the flue gas heat exchange device is arranged electric cleaner, need to consider the influence of these factors, mainly contain the following aspects:
1) electric cleaner is carried out preservative treatment.To the consulting of relevant deduster producer, mainly concentrate on the following aspects:
(1) sealing.Electric cleaner should have and well prevents the measure of leaking out, what electric cleaner was too much leaks out, it is excessive to cause the interior cigarette temperature of electric cleaner to descend on the one hand, and the aggravation flue gas amasss to reveal and works the mischief, and near leaking out a little, because flue-gas temperature is very low, must have long-pending revealing to produce, this place will produce corrosion in short-term, and the time has been grown corrosion area expansion and finally caused electric cleaner normally to use, and leaking out of electric cleaner a little mainly is to pass the electric cleaner hole, and promptly manhole door, rapping perforation, negative electrode are hung etc.
(2) insulation.In order fully to keep flue gas temperature in electric cleaner, objectively increase insulation layer thickness or select the littler thermal insulating material of thermal conductivity that the low temperature electric cleaner is carried out the INSULATION DESIGN construction.
(3) insulator is carried out hot-air blowing.The electric cleaner insulator is industrial electroceramics, its inwall is in the electric field flue gas environment, because the cigarette temperature is low excessively, internal surface is easy to generate long-pending revealing and quilt band dust pollution, all insulators are carried out effective heat tracing make its temperature more than flue gas acid dew point, carry out the forced air purging to its internal surface in 10~15 ℃, guarantee to hang insulator surface from measure and do not produce long-pending dew phenomenon, and keep its cleaning, thereby guarantee that insulator not by the fertile electrical breakdown of long-pending dew, makes its safe operation.
(4) prevent that printed line is stained with ash.Because flue-gas temperature reduces, and has increased grey viscosity, thereby must suitably improve the vibration acceleration of printed line, suitably improve the rapping frequency on the other hand, the sticking ash of prevention printed line for the electric cleaner of this moment.Adopt easy-to-clean ash uncorruptible material as stainless steel helix or stainless steel discharge prickle etc. for cathode line.
(5) consider sour gas because long-pending corrosion of revealing to housing, the housing of electric cleaner adopt anticorrosive preferred metal material as: examine time steel or acid-proof coating, to prolong the working life of electric cleaner.
More than be some the specific aim measures to low temperature electric cleaner safe and reliable operation, keep suitably high flow velocity for such electric cleaner electric field planted agent, it is disadvantageous that low excessively flue gas flow rate keeps cigarette temperature in the electric field.Therefore, the deduster behind the flue gas heat exchange device is under same examination condition, and when electric precipitation bulk volume, specific collection area etc. are not considered the situation of input gas temperature reduction, the conventional temperature electric cleaner of the output investment ratio of electric cleaner will increase to some extent.
2) the easy dust stratification of heat exchange pipeline in the flue gas heat exchange device, maintenance cost is higher.Flue gas is not owing to gather dust through electric cleaner, and the ash content in the flue gas is higher, and when by low-level (stack-gas) economizer, very easily dust stratification influences the heat exchange effect.Therefore need in the flue gas heat exchange device, be provided with and effectively blow grey measure, to reduce the influence of dust stratification.
3) because flue gas is not gathered dust, easily the heat exchange pipeline in the flue gas heat exchange device is caused wearing and tearing, operation risk is big.
4) to all flue, induced draught fan will be considered the anti-low-temperature corrosion measure behind the flue gas heat exchange device.For induced draught fan, need to consider the preservative treatment of induced draught fan blade and flow passage component, the manufacturer of domestic induced draught fan does not still have this design experiences.It is longer to carry out antiseptic flue length, until the flue of desulfurizer inlet all needs to carry out the preservative treatment of the clean flue of similar desulfurization, expense is higher from the outlet of flue gas heat exchange device.
5) the heat exchanging tube material of flue gas heat exchange device is chosen the corrosion that should consider that the flue gas running temperature causes about dew point temperature, considers flue gas again not by the wearing and tearing of gathering dust and causing, and domestic existing material is difficult to adapt to rugged environment like this.Conclusion:
At this engineering coal characteristic, the problem of scheme one maximum is burn into dust stratification, wearing and tearing,
Except that above problem, arrangement one can't utilize the temperature rise of flue gas by induced draught fan, and income is relatively poor.
The model utility content
A kind of fume afterheat ammonia turbine generating system is characterized in that comprising ammoniacal liquor---flue gas heat exchange device, ammonia steam turbine, generator, jet pump, concentrated ammonia liquor storage tank, weak aqua ammonia storage tank, two ammoniacal liquor booster pumps; Described ammoniacal liquor---flue gas heat exchange device is arranged in the flue, and ammoniacal liquor is in this heat exchanger.
The low-level (stack-gas) economizer scheme is to improve heat regenerative system efficient with the flue gas heating water of condensation, is there there the system that does not directly utilize the fume afterheat generating? we study and have designed a cover fume afterheat power generation system, both can be used for the thermal power plant, also can be used for the occasion that industries such as iron and steel, chemical industry have heat loss due to exhaust gas.As shown in Figure 2, comprise ammoniacal liquor-flue gas heat exchange device, ammonia steam turbine, generator, jet pump, concentrated ammonia liquor storage tank, weak aqua ammonia storage tank, two ammoniacal liquor booster pumps.Flue gas-ammoniacal liquor heat exchanger is arranged in the flue, and ammoniacal liquor heats in this heat exchanger, evaporation, gas-liquid separation; Weak aqua ammonia in the weak aqua ammonia storage tank condenses through weak aqua ammonia booster pump line transportation to ammonia jet pump and absorbs ammonia from the steam turbine outlet pipe, forms vacuum simultaneously in turbine system; Steam turbine is converted into mechanical energy drive generator for electricity generation with the kinetic energy and the heat energy of ammonia.
Technological process is as follows: the concentrated ammonia liquor in the concentrated ammonia liquor storage tank through concentrated ammonia liquor booster pump line transportation to heat exchanger heat, evaporation, gas-liquid separation, gas is inhaled into steam turbine, liquid flows into the weak aqua ammonia storage tank, ammonia after doing manual work in steam turbine is delivered to jet pump with being recycled to the concentrated ammonia liquor storage tank from the weak aqua ammonia behind the weak aqua ammonia booster pump through the steam turbine outlet pipe, thereby formation closed loop, smoke evacuation heat energy is made full use of, reduce the atmospheric heat discharging.
After the utility model flue gas heat exchange device is arranged in induced draught fan, before the desulfurizer:
To this kind of this engineering arrangement, flue gas can utilize the temperature rise after flue gas passes through induced draught fan after passing through deduster front and back flue and deduster.
Adopt this arrangement advantage to be, electric cleaner, induced draught fan do not need to carry out preservative treatment, and flue-gas temperature can drop to very low reaching about 60 ℃ behind the flue gas heat exchange device, can adopt the electric cleaner and the induced draught fan of domestic routine, and technology maturation is reliable; Flue gas is utilized by the temperature rise of induced draught fan, and income is obvious; The wearing and tearing of the interior heat exchange pipeline of flue gas heat exchange device are less, and dust stratification is few, and operation risk greatly reduces.The shortcoming that adopts this arrangement is the raising electric cleaner efficient that can't utilize the flue-gas temperature reduction to bring, the benefit that reduces induced draught fan power.
Comprehensive relatively, present stage the flue gas heat exchange device the plan of establishment, employing scheme two.
In sum, owing to adopted technique scheme, the beneficial effects of the utility model are:
1, this programme adopts fume afterheat heating low boiling working fluid (ammonia), makes it heat in heat exchanger, evaporate and enter steam turbine, drives steam turbine, and then the pushing generator generating, and smoke evacuation heat energy is made full use of, and the minimizing atmospheric heat is discharged.
2, after the desulfuration absorbing tower entrance flue gas temperature reduced, evaporated water reduced in the absorption tower, and the corresponding saving of sulfur removal technology water consumption can be played water-saving purpose.
3, by present stage electric cleaner and induced draught fan material and state-of-art, advanced more, the science of the present stage arrangement two of flue gas heat exchange device.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
System's connection diagram of Fig. 1 low-level (stack-gas) economizer.
Fig. 2 is the utility model fume afterheat ammonia turbine generating system.
Fig. 3 flue gas heat exchange device arrangement (last figure is a prior art scheme one, and figure below is the utility model scheme two).
Embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
As shown in Figure 2, comprise ammoniacal liquor-flue gas heat exchange device, ammonia steam turbine, generator, jet pump, concentrated ammonia liquor storage tank, weak aqua ammonia storage tank, two ammoniacal liquor booster pumps.Flue gas-ammoniacal liquor heat exchanger is arranged in the flue, and ammoniacal liquor heats in this heat exchanger, evaporation, gas-liquid separation; Weak aqua ammonia in the weak aqua ammonia storage tank condenses through weak aqua ammonia booster pump line transportation to ammonia jet pump and absorbs ammonia from the steam turbine outlet pipe, forms vacuum simultaneously in turbine system; Steam turbine is converted into mechanical energy drive generator for electricity generation with the kinetic energy and the heat energy of ammonia.
Technological process is as follows: the concentrated ammonia liquor in the concentrated ammonia liquor storage tank through concentrated ammonia liquor booster pump line transportation to heat exchanger heat, evaporation, gas-liquid separation, gas is inhaled into steam turbine, liquid flows into the weak aqua ammonia storage tank, ammonia after doing manual work in steam turbine is delivered to jet pump with being recycled to the concentrated ammonia liquor storage tank from the weak aqua ammonia behind the weak aqua ammonia booster pump through the steam turbine outlet pipe, thereby formation closed loop, smoke evacuation heat energy is made full use of, reduce the atmospheric heat discharging.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.

Claims (2)

1. fume afterheat ammonia turbine generating system is characterized in that comprising ammoniacal liquor---flue gas heat exchange device, ammonia steam turbine, generator, jet pump, concentrated ammonia liquor storage tank, weak aqua ammonia storage tank, two ammoniacal liquor booster pumps; Described ammoniacal liquor---flue gas heat exchange device is arranged in the flue, and ammoniacal liquor is in this heat exchanger.
2. fume afterheat ammonia turbine generating system according to claim 1, it is characterized in that described ammonia----flue gas heat exchange device be arranged on induced draught fan after, before the desulfurizer.
CN2011200676798U 2011-03-15 2011-03-15 Flue gas waste heat power generating system comprising ammonia steam turbine Expired - Lifetime CN201991580U (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434235A (en) * 2011-10-28 2012-05-02 天津大学 Kalina cycle generation system adopting ejector
CN102562179A (en) * 2012-01-17 2012-07-11 天津大学 Organic Rankine cycle power generation system with liquid ejection device
CN102635416A (en) * 2012-04-17 2012-08-15 浙江大学 Low-grade thermally-driven Rankine power generation device with ejector
CN102733871A (en) * 2012-07-16 2012-10-17 郑州大学 Low-temperature waste heat power generation system
CN102797525A (en) * 2012-08-31 2012-11-28 天津大学 Low-temperature Rankine circulation system employing non-azeotropic mixed working medium variable components
CN103161535A (en) * 2013-03-06 2013-06-19 中冶南方工程技术有限公司 Smoke waste heat power generation system of heating furnace
CN103225961A (en) * 2013-04-23 2013-07-31 中冶南方工程技术有限公司 Sintering flue gas waste heat power generation system and method
CN103225007A (en) * 2013-04-23 2013-07-31 中冶南方工程技术有限公司 Power generation system and method by blast furnace hot-blast stove flue gas waste heat
CN104153834A (en) * 2014-07-15 2014-11-19 天津大学 Power generation and cooling hybrid system based on Kalina cycle
CN107923265A (en) * 2015-08-13 2018-04-17 气体膨胀汽车有限公司 Thermal Motor

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434235A (en) * 2011-10-28 2012-05-02 天津大学 Kalina cycle generation system adopting ejector
CN102562179A (en) * 2012-01-17 2012-07-11 天津大学 Organic Rankine cycle power generation system with liquid ejection device
CN102635416A (en) * 2012-04-17 2012-08-15 浙江大学 Low-grade thermally-driven Rankine power generation device with ejector
CN102733871A (en) * 2012-07-16 2012-10-17 郑州大学 Low-temperature waste heat power generation system
CN102797525A (en) * 2012-08-31 2012-11-28 天津大学 Low-temperature Rankine circulation system employing non-azeotropic mixed working medium variable components
CN103161535A (en) * 2013-03-06 2013-06-19 中冶南方工程技术有限公司 Smoke waste heat power generation system of heating furnace
CN103161535B (en) * 2013-03-06 2015-03-25 中冶南方工程技术有限公司 Smoke waste heat power generation system of heating furnace
CN103225007A (en) * 2013-04-23 2013-07-31 中冶南方工程技术有限公司 Power generation system and method by blast furnace hot-blast stove flue gas waste heat
CN103225961B (en) * 2013-04-23 2015-09-30 中冶南方工程技术有限公司 Sinter fume afterheat generating system and method
CN103225961A (en) * 2013-04-23 2013-07-31 中冶南方工程技术有限公司 Sintering flue gas waste heat power generation system and method
CN104153834B (en) * 2014-07-15 2015-08-19 天津大学 A kind of generating based on the circulation of card Linne, cooling association system
CN104153834A (en) * 2014-07-15 2014-11-19 天津大学 Power generation and cooling hybrid system based on Kalina cycle
CN107923265A (en) * 2015-08-13 2018-04-17 气体膨胀汽车有限公司 Thermal Motor
CN107923265B (en) * 2015-08-13 2021-01-15 气体膨胀汽车有限公司 Heat engine

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Address after: 610021 No. 18 Dongfeng Road, Sichuan, Chengdu

Patentee after: China Power Engineering Consulting Group Southwest Electric Power Design Institute Co., Ltd.

Address before: 610021 No. 18 Dongfeng Road, Sichuan, Chengdu

Patentee before: Southwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation

Address after: 610021 No. 18 Dongfeng Road, Sichuan, Chengdu

Patentee after: China Power Engineering Consulting Group Southwest Electric Power Design Institute Co., Ltd.

Address before: 610021 No. 18 Dongfeng Road, Sichuan, Chengdu

Patentee before: Southwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation

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Owner name: CHINA POWER ENGINEERING CONSULTING GROUP SOUTHWEST

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Granted publication date: 20110928

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