CN102769304A - Boiler smoke waste heat power generation system - Google Patents
Boiler smoke waste heat power generation system Download PDFInfo
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- CN102769304A CN102769304A CN2012102414924A CN201210241492A CN102769304A CN 102769304 A CN102769304 A CN 102769304A CN 2012102414924 A CN2012102414924 A CN 2012102414924A CN 201210241492 A CN201210241492 A CN 201210241492A CN 102769304 A CN102769304 A CN 102769304A
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- working medium
- decompressor
- evaporator
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- side pwm
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a boiler smoke waste heat power generation system in the technical field of low-temperature smoke waste heat utilization. The boiler smoke waste heat power generation system comprises a liquid storage device, a booster pump, an evaporator, an expansion machine, a condenser, a fan, a power generator system and a smoke bypass adjusting valve, wherein the power generator system comprises a permanent magnet synchronous generator, a machine side PWM (Pulse Width Modulation) converter, a direct-current link capacitor, a network side PWM converter and a transformer. The variable frequency speed regulation technology of a motor is applied to the field of smoke waste heat power generation, an electromagnetic torque of a generator is controlled through the machine side PWM converter to change rotary speed of the generator and the expansion machine, wherein the expansion machine is connected with the generator, therefore, flow quantity of a working medium entering into the expansion machine can be adjusted,an adjusting valve can be replaced, working medium flow quantity or pressure at an evaporator outlet can be controlled, throttling loss due to the existence of a valve is reduced; and power generation frequencies are guaranteed to meet the requirements of a power grid through electric energy conversion of the network side PWM converter.
Description
Technical field
The invention belongs to low-temperature flue gas UTILIZATION OF VESIDUAL HEAT IN technical field, relate in particular to a kind of residual heat from boiler fume electricity generation system.
Background technology
Fume afterheat as a kind of fuel combustion after remaining thermal source, extensively be present in industries such as cement, iron and steel, chemical industry, electric power.Wherein for the utilization of senior middle school's temperature fume afterheat by broad research, but because temperature is lower in the energy grade of the flue gas below 300 ℃, thereby development difficulty is bigger.The research to the low-temperature flue gas UTILIZATION OF VESIDUAL HEAT IN at present launches gradually, and wherein organic Rankine recycles organic substance as working medium, and is simple in structure because of it, efficient is high, the low temperature heat energy of recyclable different temperatures scope and being used widely.
The afterheat generating system that proposes at present based on the organic Rankine circulation; Basically all be through connecting generator and decompressor, driving generator for electricity generation, still because electrical network and various power consumption equipment have the requirement of strictness to the quality of power supply by decompressor; Therefore for the fume afterheat electricity generation system; Need to regulate power generating quality, to guarantee that the generating frequency near 50Hz, meets the requirement of electrical network.And in the research to the fume afterheat electricity generation system that circulates based on organic Rankine at present, the adjusting of generating frequency is studied also not deeply.
For large-scale synchronous generator factory, for example thermal power plant, hydroelectric plant generally adopt LOAD FREQUENCY control; With the thermal power plant is example; Owing to through increasing or reduce the power output that fuel quantity is easy to control generating set, therefore can keep the balance of power and load, make frequency stabilization.But for afterheat generating system; Because the fume afterheat resource generally is the byproduct of certain industrial process; Its temperature and flow can constantly change along with the variation of industrial process, therefore utilize fume afterheat for the degree of depth, are difficult to through the ACTIVE CONTROL waste heat energy; The power output of adjustment fume afterheat electricity generation system, this causes the load-frequency control system of traditional power plant can't effectively be applied to the fume afterheat electricity generation system.
Simultaneously for realizing utilization to residual heat resources; When smoke inlet temperature and flow are in a certain stable state; The evaporating pressure of organic working medium and outlet temperature can influence the efficient that system utilizes fume afterheat in the evaporator; Therefore evaporating pressure and outlet temperature are to embody the key parameter of UTILIZATION OF VESIDUAL HEAT IN efficient in the evaporator, need be controlled at suitable scope.In existing scheme; The evaporator outlet pipeline directly links to each other with the decompressor inlet; If decompressor invariablenes turning speed; Only can't control the size of evaporating pressure and outlet temperature simultaneously, therefore between evaporator and decompressor, be provided with pressure regulating valve, regulate the evaporator outlet temperature in service and the evaporating pressure of whole system in conjunction with booster pump through booster pump.Yet the valve before the decompressor can cause throttling loss, causes the afterheat generating system decrease in efficiency.
Summary of the invention
To mention in the above-mentioned background technology existing fume afterheat utilize system's generating efficiency low, exist throttling loss and generating frequency to be difficult for deficiencies such as adjusting, the present invention proposes a kind of residual heat from boiler fume electricity generation system.
Technical scheme of the present invention is; A kind of residual heat from boiler fume electricity generation system; Be used for heat generating, it is characterized in that this system comprises reservoir 1, booster pump 2, evaporator 3, decompressor 4, condenser 5, blower fan 6, generator system 7 and gas bypass adjuster valve 8 through organic Rankine recycle boiler smoke;
The fume side entrance of said evaporator 3 inserts boiler smoke; 3 parallel connections insert boiler smoke to gas bypass adjuster valve 8 with evaporator; The working medium side pipe outlet of evaporator 3 is connected with the inlet of decompressor 4; The axle of decompressor 4 is connected with the power transmission shaft of generator system 7; The outlet of decompressor 4 is connected with the inlet of condenser 5; The outside of condenser 5 is connected with blower fan 6; The outlet of condenser 5 is connected with reservoir 1 inlet; The outlet of reservoir 1 is connected with the inlet of booster pump 2; The working medium side entrance of the outlet of booster pump 2 and evaporator 3 is connected;
Said reservoir 1 is used to store organic working medium;
Said booster pump 2 is used to control the flow of the organic working medium that gets into evaporator 3;
Said evaporator 3 is used for organic working medium and the mutual heat exchange of flue gas;
The organic working medium that is used for said decompressor 4 expands and does work, and makes heat energy be converted into mechanical energy;
Said condenser 5 is used for the cooling of organic working medium and condenses;
Said blower fan 6 is used to produce the air that makes the working medium cooling;
Said generator system 7 is used for the mechanical energy of decompressor 4 is converted into electric energy, and the rotating speed of control decompressor 4 and adjusting generating frequency;
Said gas bypass adjuster valve 8 is used for when flue gas flow surpasses system design values, discharging unnecessary flue gas;
Said generator system 7 comprises magneto alternator 9, pusher side pwm converter 10, direct current chain capacitor 11, net side pwm converter 12 and transformer 13;
The axle of magneto alternator 9 is connected with the axle of decompressor 4; The stator winding of magneto alternator 9 is connected with pusher side pwm converter 10; Pusher side pwm converter 10 is connected with direct current chain capacitor 11; Direct current chain capacitor 11 is connected with net side pwm converter 12; Net side pwm converter 12 is connected with transformer 13;
Said magneto alternator 9 is used for mechanical energy is converted into electric energy;
Said pusher side pwm converter 10 is used to regulate the stator winding electric current, the electromagnetic torque of control magneto alternator 9;
Energy storage in the middle of said direct current chain capacitor 11 is used for;
Said net side pwm converter 12 is used to the DC bus-bar voltage that provides stable, realizes the power factor adjustment of net side or the Reactive Power Control that is incorporated into the power networks;
Said transformer 13 is used to change voltage.
Advantage of the present invention is:
(1) fume afterheat utilizes electricity generation system can pass through the electromagnetic torque of control generator; Change the rotating speed of generator and the coupled decompressor that connects; And then adjusting gets into the working medium flow of decompressor; Thereby the working medium flow or the pressure that replace adjuster valve control evaporator outlet have reduced the throttling loss that causes because of the valve existence.
(2) fume afterheat utilizes the electricity generation system can be to system's regulating of frequency of generating electricity through alternating frequency conversion technique; Make the generating frequency of afterheat generating system constant; Meet the requirement of electrical network, and realize the power factor adjustment of electricity generation system or the Reactive Power Control that is incorporated into the power networks.
Description of drawings
Fig. 1 is based on the structured flowchart of the residual heat from boiler fume electricity generation system of variable-frequency control technique and organic Rankine circulation.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit scope of the present invention and application thereof.
Native system is applied to fume afterheat through the ac variable speed technology with motor and utilizes the field; Realize variable speed constant frequency control through double-PWM frequency converter to generator; Promptly control, change the rotating speed of generator and coupled decompressor, and then change the working medium flow that gets into decompressor through electromagnetic torque to generator; Thereby replace the working medium flow or the pressure of adjuster valve control evaporator outlet, reduce the throttling loss that valve brings.Make the generating frequency of afterheat generating system constant simultaneously, meet the requirement of electrical network, and realize the power factor adjustment of electricity generation system or the Reactive Power Control that is incorporated into the power networks.
Its technological process is: in system works, all flue gases enter into the fume side entrance of evaporator 3 from boiler back end ductwork, in evaporator 3, carry out heat exchange with organic working medium, flow out from the outlet of the fume side pipeline of evaporator 3 then; Organic working medium gets in the evaporator 3 working medium side pipelines through the pressurization of booster pump 2, by flue gas heating, becomes superheated vapor after having experienced cold excessively, saturated, overheated three phases; The organic working medium superheated vapor gets into decompressor 4 expansion actings afterwards; Make heat energy be converted into mechanical energy; The weary gas of low pressure after the acting gets in the condenser 5 and after blower fan 6 heat radiation coolings are condensed into liquid again, gets into reservoir 1, is sent in the evaporator 3 by booster pump 2 pressurizations again, gets into the next round circulation; Generator system 7 is connected with decompressor 4, is converted into electric energy to mechanical energy at work, and the electric energy of output is changed to the electrical network power output; Gas bypass adjuster valve 8 inserts boiler smoke through pipeline and evaporator 3 parallel connections.
Fig. 1 is the structured flowchart that the present invention is based on the residual heat from boiler fume electricity generation system of variable-frequency control technique and organic Rankine circulation; As shown in the figure, the critical piece of this system comprises reservoir 1, booster pump 2, evaporator 3, decompressor 4, condenser 5, blower fan 6, generator system 7 and gas bypass adjuster valve 8.
One end of evaporator 3 fume side pipelines connects the boiler smoke inlet, and the other end connects back-end ductwork; Gas bypass adjuster valve 8 is connected with the boiler smoke inlet through pipeline, and the other end connects back-end ductwork through pipeline; Evaporator 3 working medium side entrances are connected with decompressor 4 inlets with booster pump 2 outlets respectively with outlet; Decompressor 4 outlets are connected with condenser 5; Condenser 5 outsides are connected with blower fan 6, and condenser 5 pipe outlets are connected with reservoir 1 inlet; The outlet of reservoir 1 is connected with the inlet of booster pump 2; The outlet of booster pump 2 is connected with evaporator 3 working medium side entrances; The power transmission shaft of the rotor of generator system 7 is connected with the axle of decompressor 4, and opposite side is connected with electrical network.
Comprise magneto alternator 9, pusher side pwm converter 10, direct current chain capacitor 11, net side pwm converter 12, transformer 13 in this generator system 7.
The axle of magneto alternator 9 is connected with the axle of decompressor 4, and stator winding is connected with pusher side pwm converter 10; Pusher side pwm converter 10 is connected 11 with direct current chain capacitor; Direct current chain capacitor 11 is connected with net side pwm converter 12; Net side pwm converter 12 is connected with transformer 13; Transformer 13 is connected with electrical network.
Net side pwm converter 12 can work in inversion and two operating states of rectification; Stable DC bus-bar voltage is provided; Pusher side pwm converter 10 is through the adjusting to the generator unit stator winding current; Electromagnetic torque to magneto alternator 9 is controlled, thereby changes the rotating speed of magneto alternator 9 and coupled decompressor 4, simultaneously because the rectification and the inversion of net side pwm converter 12; Under the situation of magneto alternator 9 rotation speed change, make the generating frequency of afterheat generating system constant, meet the requirement of electrical network.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (1)
1. residual heat from boiler fume electricity generation system; Be used for heat generating, it is characterized in that this system comprises reservoir (1), booster pump (2), evaporator (3), decompressor (4), condenser (5), blower fan (6), generator system (7) and gas bypass adjuster valve (8) through organic Rankine recycle boiler smoke;
The fume side entrance of said evaporator (3) inserts boiler smoke; Gas bypass adjuster valve (8) and evaporator (3) parallel connection insert boiler smoke; The working medium side pipe outlet of evaporator (3) is connected with the inlet of decompressor (4); The axle of decompressor (4) is connected with the power transmission shaft of generator system (7); The outlet of decompressor (4) is connected with the inlet of condenser (5); The outside of condenser (5) is connected with blower fan (6); The outlet of condenser (5) is connected with reservoir (1) inlet; The outlet of reservoir (1) is connected with the inlet of booster pump (2); The outlet of booster pump (2) is connected with the working medium side entrance of evaporator (3);
Said reservoir (1) is used to store organic working medium;
Said booster pump (2) is used for the flow that control gets into the organic working medium of evaporator (3);
Said evaporator (3) is used for organic working medium and the mutual heat exchange of flue gas;
The organic working medium that is used for said decompressor (4) expands and does work, and makes heat energy be converted into mechanical energy;
Said condenser (5) is used for the cooling of organic working medium and condenses;
Said blower fan (6) is used to produce the air that makes the working medium cooling;
Said generator system (7) is used for the mechanical energy of decompressor (4) is converted into electric energy, and the rotating speed of control decompressor (4) and adjusting generating frequency;
Said gas bypass adjuster valve (8) is used for when flue gas flow surpasses system design values, discharging unnecessary flue gas;
Said generator system (7) comprises magneto alternator (9), pusher side pwm converter (10), direct current chain capacitor (11), net side pwm converter (12) and transformer (13);
The axle of magneto alternator (9) is connected with the axle of decompressor (4); The stator winding of magneto alternator (9) is connected with pusher side pwm converter (10); Pusher side pwm converter (10) is connected with direct current chain capacitor (11); Direct current chain capacitor (11) is connected with net side pwm converter (12); Net side pwm converter (12) is connected with transformer (13);
Said magneto alternator (9) is used for mechanical energy is converted into electric energy;
Said pusher side pwm converter (10) is used to regulate the stator winding electric current, the electromagnetic torque of control magneto alternator (9);
Energy storage in the middle of said direct current chain capacitor (11) is used for;
Said net side pwm converter (12) is used to the DC bus-bar voltage that provides stable, realizes the power factor adjustment of net side or the Reactive Power Control that is incorporated into the power networks;
Said transformer (13) is used to change voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102414924A CN102769304A (en) | 2012-07-12 | 2012-07-12 | Boiler smoke waste heat power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102414924A CN102769304A (en) | 2012-07-12 | 2012-07-12 | Boiler smoke waste heat power generation system |
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| CN102769304A true CN102769304A (en) | 2012-11-07 |
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| CN2012102414924A Pending CN102769304A (en) | 2012-07-12 | 2012-07-12 | Boiler smoke waste heat power generation system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195528A (en) * | 2013-03-23 | 2013-07-10 | 山西易通环能科技集团有限公司 | Method and device for generating power through low-temperature waste gas waste in industrial furnace production technology |
| CN103982256A (en) * | 2013-12-31 | 2014-08-13 | 湖南齐力达电气科技有限公司 | Control device and method for grid-combined type low-temperature waste heat generating system |
| CN104037796A (en) * | 2013-12-31 | 2014-09-10 | 湖南齐力达电气科技有限公司 | Grid-connected type multi-loop low temperature waste heat power generation system |
| CN104242758A (en) * | 2013-06-07 | 2014-12-24 | 株式会社神户制钢所 | Power generating device |
| CN104265388A (en) * | 2014-09-30 | 2015-01-07 | 天津大学 | Energy storage type waste heat recycling system |
| WO2015092675A1 (en) * | 2013-12-19 | 2015-06-25 | International Business Machines Corporation | Device and method for converting heat into mechanical energy |
| CN107910985A (en) * | 2017-12-22 | 2018-04-13 | 中国科学院电工研究所 | A kind of afterheat generating system based on evaporation-cooled device |
| CN111287816A (en) * | 2020-04-03 | 2020-06-16 | 南京天加热能技术有限公司 | Organic Rankine cycle power generation system capable of directly recycling black water waste heat |
| TWI769837B (en) * | 2021-05-28 | 2022-07-01 | 國立勤益科技大學 | Waste heat recovery system and control method thereof |
Citations (3)
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| CN201170543Y (en) * | 2008-03-18 | 2008-12-24 | 南京凯盛开能环保能源有限公司 | Simple middle/low-temperature waste heat power generation system kiln head boiler for cement kiln |
| JP2008312330A (en) * | 2007-06-13 | 2008-12-25 | Ebara Corp | Waste heat power generating apparatus and operation method for the waste heat power generating apparatus |
| CN102435077A (en) * | 2011-11-04 | 2012-05-02 | 孙慕文 | Process and device for waste heat recycling and efficiency power generation of metallurgy waste heat gas |
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- 2012-07-12 CN CN2012102414924A patent/CN102769304A/en active Pending
Patent Citations (3)
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| JP2008312330A (en) * | 2007-06-13 | 2008-12-25 | Ebara Corp | Waste heat power generating apparatus and operation method for the waste heat power generating apparatus |
| CN201170543Y (en) * | 2008-03-18 | 2008-12-24 | 南京凯盛开能环保能源有限公司 | Simple middle/low-temperature waste heat power generation system kiln head boiler for cement kiln |
| CN102435077A (en) * | 2011-11-04 | 2012-05-02 | 孙慕文 | Process and device for waste heat recycling and efficiency power generation of metallurgy waste heat gas |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195528A (en) * | 2013-03-23 | 2013-07-10 | 山西易通环能科技集团有限公司 | Method and device for generating power through low-temperature waste gas waste in industrial furnace production technology |
| CN104242758A (en) * | 2013-06-07 | 2014-12-24 | 株式会社神户制钢所 | Power generating device |
| WO2015092675A1 (en) * | 2013-12-19 | 2015-06-25 | International Business Machines Corporation | Device and method for converting heat into mechanical energy |
| US10683776B2 (en) | 2013-12-19 | 2020-06-16 | International Business Machines Corporation | Device and method for converting heat into mechanical energy |
| CN103982256A (en) * | 2013-12-31 | 2014-08-13 | 湖南齐力达电气科技有限公司 | Control device and method for grid-combined type low-temperature waste heat generating system |
| CN104037796A (en) * | 2013-12-31 | 2014-09-10 | 湖南齐力达电气科技有限公司 | Grid-connected type multi-loop low temperature waste heat power generation system |
| CN103982256B (en) * | 2013-12-31 | 2015-11-18 | 湖南齐力达电气科技有限公司 | A kind of control gear of grid type low-temperature waste heat power generation system |
| CN104265388A (en) * | 2014-09-30 | 2015-01-07 | 天津大学 | Energy storage type waste heat recycling system |
| CN107910985A (en) * | 2017-12-22 | 2018-04-13 | 中国科学院电工研究所 | A kind of afterheat generating system based on evaporation-cooled device |
| CN111287816A (en) * | 2020-04-03 | 2020-06-16 | 南京天加热能技术有限公司 | Organic Rankine cycle power generation system capable of directly recycling black water waste heat |
| TWI769837B (en) * | 2021-05-28 | 2022-07-01 | 國立勤益科技大學 | Waste heat recovery system and control method thereof |
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Application publication date: 20121107 |