CN101788141B - Application of absorption type heat regenerator in regenerative circulation system of power plant - Google Patents

Application of absorption type heat regenerator in regenerative circulation system of power plant Download PDF

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Publication number
CN101788141B
CN101788141B CN2010101207364A CN201010120736A CN101788141B CN 101788141 B CN101788141 B CN 101788141B CN 2010101207364 A CN2010101207364 A CN 2010101207364A CN 201010120736 A CN201010120736 A CN 201010120736A CN 101788141 B CN101788141 B CN 101788141B
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steam
pipe
type heat
condensate
absorption type
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CN101788141A (en
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王利军
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王利军
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Abstract

The invention discloses an absorption type heat regenerator and application thereof in a regenerative cycling system of a power plant. The key improvement of the absorption type heat regenerator is as follows: the absorption type heat regenerator comprises a generator, an absorber, an expansion mechanism and a working medium pump. The steam inlet of the generator of the absorption type heat regenerator is connected with the steam pumping pipe of a steam turbine through a pipeline, the condensate outlet of the generator of the absorption type heat regenerator is connected with the return condensate pipeline of a boiler through a pipeline, the steam generation outlet of the generator is connected with the steam exhaust pipe of the steam turbine through a pipeline; and the steam absorption inlet of the absorber is connected with the steam pumping pipe of the steam turbine through a pipeline, the cooling water inlet of the absorber is connected with a condensate pipe, and the cooling water outlet of the absorber is also connected with a condensate pipe. The absorption type heat regenerator has the advantages of reducing the number of regenerative cycles for pumping of high-pressure steam, improving the energy conversion efficiency and generation power, saving the energy, and reducing emissions.

Description

The application of a kind of absorption type heat regenerator in heat exchange cycle system of power plant
Technical field
The present invention relates to the application of a kind of absorption type heat regenerator in heat exchange cycle system of power plant.
Background technology
There are many factor affecting the Steam Power Circulation thermal efficiency.Prior art generally adopts the backheat circulating technology, utilizes intermediate extraction in regenerator Steam Power Circulation system back boiler condensate water to be heated, and improves thermal efficiency of cycle by a relatively large margin by the temperature that improves the back boiler condensate water.In order to make the backheat circulation reach the high as far as possible thermal efficiency, concrete condition according to circulation, 3~8 grades of regenerators of normal employing, the back boiler condensate water of utilizing the classification intermediate extraction of different pressures will enter certain one-level regenerator is heated to the saturation temperature of drawing gas near this, progressively raising along with the back boiler condensing water temperature, the pressure of needed intermediate extraction is also wanted corresponding raising, because this part intermediate extraction can not continue the acting of expanding in steam turbine, the acting ability that the elevated pressures intermediate extraction is lost is also bigger, the corresponding generated output that reduces generator, this is the insurmountable problem of prior art.
Summary of the invention
The invention provides the application of a kind of absorption type heat regenerator in heat exchange cycle system of power plant, power plant is existing to utilize the heat exchange cycle system of steam-extracting type regenerator to cause the bigger problem of generator for electricity generation power loss to solve, can effectively improve the generated output of generator, make full use of the energy, energy-saving and emission-reduction.
For addressing the above problem, the technical solution adopted in the present invention is: a kind of absorption type heat regenerator, its key improvements is: described absorption type heat regenerator comprises generator, absorber, expansion mechanism and working medium pump, wherein the weak solution pipe is connected with the solution side of absorber and generator respectively with the concentrated solution pipe, on the weak solution pipe, be provided with expansion mechanism, on the concentrated solution pipe, be provided with working medium pump, generator also is provided with and drives steam inlet, condensate water outlet and steam (vapor) outlet takes place, and absorber also is provided with cooling water inlet, coolant outlet and absorption steam inlet.
Above-mentioned generator is a cavity, establishes heat-exchange tube in the cavity, and the two ends of heat-exchange tube connect driving steam inlet and condensate water outlet respectively.
Above-mentioned absorber is a cavity, establishes heat-exchange tube in the cavity, and the two ends of heat-exchange tube connect cooling water inlet and coolant outlet respectively.
For addressing the above problem, the technical scheme that the present invention also adopts is: the application of absorption type heat regenerator in heat exchange cycle system of power plant, its key improvements is: the driving steam inlet of generator is connected with first order extraction steam pipe on being arranged on steam turbine by pipeline in the described absorption type heat regenerator, the condensate water outlet is connected with the back boiler condensate pipe by pipeline, and the generation steam (vapor) outlet of generator is connected with the exhaust steam in steam turbine pipe by pipeline; The absorption steam inlet of absorber is connected with extraction steam pipe by pipeline, extraction steam pipe is connected with first order extraction steam pipe on being arranged on steam turbine, cooling water inlet is connected with the back boiler condensate pipe by pipeline, and coolant outlet is connected with the back boiler condensate pipe by pipeline.
Above-mentioned absorption type heat regenerator is provided with two-stage, the driving steam inlet of generator is connected with first order extraction steam pipe on being arranged on steam turbine by pipeline in the first order absorption type heat regenerator, the condensate water outlet is connected with the back boiler condensate pipe by pipeline, and the generation steam (vapor) outlet of generator is connected with the exhaust steam in steam turbine pipe by pipeline; The absorption steam inlet of absorber is connected with extraction steam pipe by pipeline, extraction steam pipe is connected with first order extraction steam pipe on being arranged on steam turbine, cooling water inlet is connected with the back boiler condensate pipe by pipeline, and coolant outlet is connected by the cooling water inlet of pipeline with second level absorption type heat regenerator; The driving steam inlet of generator is connected with first order extraction steam pipe on being arranged on steam turbine by pipeline in the absorption type heat regenerator of the second level, the condensate water outlet is connected with the back boiler condensate pipe by pipeline, the generation steam (vapor) outlet of generator is connected with the exhaust steam in steam turbine pipe by pipeline, the absorption steam inlet of absorber is connected with second level extraction steam pipe in the absorption type heat regenerator of the second level, and coolant outlet is connected with the back boiler condensate pipe by pipeline.
Above-mentioned first order extraction steam pipe and second level extraction steam pipe all are connected on the turbine low pressure cylinder, and the steam pressure in the extraction steam pipe of the second level is higher than the steam pressure in the first order extraction steam pipe.
Adopt the beneficial effect that technique scheme produced to be: to remove evaporimeter, the condenser in original absorption type heat regenerator and be installed in working medium pump on the refrigerant tube, with the condenser in the replacement of the condenser in the heat exchange cycle system regenerator, cancel the former evaporimeter that is useful on to absorber supply steam, the steam inlet of absorber directly is connected with the exhaust tube of turbine low pressure cylinder by pipeline, the thermal cycle of absorption type heat regenerator is connected with heat exchange cycle system, can save resource, reduce the steam heat consumption.
Adopt the beneficial effect that technique scheme produced to be: to enter its generator solution is heated with draw gas driving steam as absorption type heat regenerator of the first order of heat exchange cycle system steam turbine minimum pressure, the generation steam that is produced is introduced heat exchange cycle system exhaust steam in steam turbine pipe, the condensate water of driving steam is introduced the back boiler condensate pipe behind the heat exchange cycle system condenser, make and drive the steam uniform pressure draw gas or slightly drawing gas of high pressure directly enter the solution side of absorption type heat regenerator absorber, discharged the latent heat of condensation after the solution absorption, make the lower back boiler condensate water of heat exchange cycle system temperature enter the cooling water side of absorption type heat regenerator absorber and be absorbed the interior solution of device to be heated near turning back to heat exchange cycle system after the solution saturation temperature in the absorber again.Though used the lower pressure of a greater number to draw gas, its complete expansion in steam turbine resulting generated output that does work is reduced to some extent, but the elevated pressures that consideration is saved is drawn gas behind the generated output that the complete expansion acting is increased in steam turbine, the present invention can increase generated output when not increasing steam power backheat circulation capital equipment capacity and fuel consumption, perhaps when not reducing generated output, can reduce fuel consumption, further raising is arranged when making the thermal efficiency of cycle ratio all adopt the regenerator that generally uses at present, can effectively improve generated output, save the energy, reduce the consumption of coal amount.Calculate by theory, generated energy can improve 2%-3% after the coal combustion of same amount.
Description of drawings
Fig. 1 is an absorption type heat regenerator workflow schematic diagram;
Fig. 2 is the steam-extracting type heat exchange cycle system schematic diagram that former power plant uses;
Fig. 3 is the heat exchange cycle system structural representation that is provided with absorption type heat regenerator;
Fig. 4 is the heat exchange cycle system structural representation that is provided with the two-stage absorption regenerator;
1, generator; 2, drive steam inlet; 3, condensate water outlet; 4, steam (vapor) outlet takes place; 5, absorber; 6, cooling water inlet; 7, coolant outlet; 8, absorb steam inlet; 9, expansion mechanism; 10, working medium pump; 11, weak solution pipe; 12, concentrated solution pipe; 13, power boiler; 14, steam turbine high-pressure cylinder; 15, Steam Turbine Through IP Admission; 16, turbine low pressure cylinder; 17, generator; 18, condenser; 19, condensate pump; 20, back boiler condensate pipe; 21, steam pipe; 22, first order regenerator; 23, second level regenerator; 24, third level regenerator; 25, fourth stage regenerator; 26, level V regenerator; 27, condensate pump; 28, the 6th grade of regenerator; 29, the 7th grade of regenerator; 30, the 8th grade of regenerator; 31, exhaust steam in steam turbine pipe; 32, first order extraction steam pipe; 33, second level extraction steam pipe; 34, third level extraction steam pipe; 35, fourth stage extraction steam pipe; 36, level V extraction steam pipe; 37, the 6th grade of extraction steam pipe; 38, the 6th grade of suction branch; 39, the 6th grade of suction branch; 40, the 7th grade of extraction steam pipe; 41, minimum pressure extraction steam pipe; 42, extraction steam pipe; 43, drive the steam steam inlet pipe; 44, drive the steam steam inlet pipe; 45, absorb the steam steam inlet pipe; 46, cooling water inlet pipe; 47, cooling water outlet pipe; 48, cooling water outlet pipe; 49, condensate water outlet pipe; 50, condensate water outlet pipe; 51, the steam gland steam exhauster takes place; 52, the steam gland steam exhauster takes place; 53, condensate pipe; 54, condensate pipe; 55, flow control valve; 56, condensate pipe; 57, condensate pipe.
Further the present invention is described in detail below in conjunction with accompanying drawing.
The specific embodiment
For making above-mentioned purpose of the present invention, feature and beneficial effect can become apparent more, below in conjunction with the drawings and specific embodiments in the embodiment of the invention, the technical scheme in the embodiment of the invention are clearly and completely described.
Absorption type heat regenerator of the present invention is mainly by generator 1, absorber 5, expansion mechanism 9, working medium pump 10 capital equipments such as grade and parts constitute, weak solution pipe 11 is connected with the solution side of absorber 5 with generator 1 respectively with concentrated solution pipe 12, on weak solution pipe 11, be provided with expansion mechanism 9, on concentrated solution pipe 12, be provided with working medium pump 10, the solution side of absorber 5, weak solution pipe 11, expansion mechanism 9, the solution side of generator 1, concentrated solution pipe 12, working medium pump 10 constitutes solution circulation loop, generator 1 also is provided with and drives steam inlet 2, condensate water outlet 3 and generation steam (vapor) outlet 4, absorber 5 also is provided with cooling water inlet 6, coolant outlet 7 and absorption steam inlet 8.The driving steam of lower pressure is become condensate water and is discharged generators 1 by condensate water outlet 3 by the heat source side that driving steam inlet 2 enters generator 1 after the lower weak solution heat release of concentration, weak solution in the generator 1 is heated to produce steam takes place, and by steam (vapor) outlet 4 discharge generators 1 take place, the higher concentrated solution of concentration behind the steam enters absorber 5 by concentrated solution pipe 12 after working medium pump 10 pressurizations solution side takes place in generation, with drive the steam uniform pressure or slightly the water vapour of high pressure absorbed by concentrated solution by absorbing the solution side that steam inlet 8 enters absorber 5, discharge heat in the absorption process, cooling water is entered the cooling water side of absorber 5 by cooling water inlet 6, in absorber 5, be heated near discharging absorber 5 by coolant outlet 7 after the solution saturation temperature in the absorber 5, absorbed the weak solution that concentration is lower behind the water vapour enters generator 1 by weak solution pipe 11 after expansion mechanism 9 step-downs solution side, solution has then been finished a circulation.
Being with again with power plant shown in Figure 2, the backheat circulation process of eight grades of regenerators of employing of heat is an example, absorption type heat regenerator of the present invention is to realize like this in the application purpose of backheat circulation, the high-temperature high-pressure overheat steam that power boiler 13 is produced is supplied with steam turbine high-pressure cylinder 14, steam in steam turbine high-pressure cylinder 14 after the overexpansion acting is extracted out by the 6th grade of extraction steam pipe 37, a part is supplied with the 8th grade of regenerator 30 by the 6th grade of suction branch 39, the reheater that all the other major parts are returned power boiler 13 through the 6th grade of suction branch 38 carries out heat again, after being improved, temperature and enthalpy supply with Steam Turbine Through IP Admission 15, steam part in Steam Turbine Through IP Admission 15 after the overexpansion acting is supplied with fourth stage regenerator 25 by third level extraction steam pipe 34, all the other most of turbine low pressure cylinders 16 of supplying with, steam in turbine low pressure cylinder 16 after the overexpansion acting enters condenser 18 through exhaust steam in steam turbine pipe 31 and condenses into water, under the driving of condensate pump 19, pass through first order regenerator 22 by the back boiler condensate water that condenser is discharged successively through back boiler condensate pipe 20, second level regenerator 23, third level regenerator 24, fourth stage regenerator 25, level V regenerator 26, steam pipe 21 infeeds steam for first order regenerator 22, first order extraction steam pipe 32 draws gas for second level regenerator 23 infeeds, second level extraction steam pipe 33 draws gas for third level regenerator 24 infeeds, third level extraction steam pipe 34 draws gas for fourth stage regenerator 25 infeeds, fourth stage extraction steam pipe 35 draws gas for level V regenerator 26 infeeds, the level V regenerator has the function of oxygen-eliminating device concurrently, the back boiler condensate water is boosted once more through condensate pump 27 after heating temperature rise and deoxygenation, and then successively through the 6th grade of regenerator 28, the 7th grade of regenerator 29, the 8th grade of regenerator 30, level V extraction steam pipe 36 is that the 6th grade of regenerator 28 infeeds and draw gas, the 6th grade of extraction steam pipe 37 is that the 7th grade of regenerator 29 infeeds and draw gas through the 6th grade of suction branch 39, the 7th grade of extraction steam pipe 40 is that the 8th grade of regenerator 30 infeeds and draw gas, and the back boiler condensate water is heated as high-temperature high-pressure overheat steam through continuing to enter power boiler 13 after the heating temperature rise.
As shown in Figure 3: in the application process of absorption type heat regenerator, cancellation third level regenerator 24, disconnection first order extraction steam pipe 32 is connected with second level regenerator 23, picking out minimum pressure extraction steam pipe 41 from first order extraction steam pipe 32 links to each other with second level regenerator 23, for regenerator 23 supplies in the second level are drawn gas, pick out extraction steam pipe 42 from first order extraction steam pipe 32, pick out driving steam steam inlet pipe 43 respectively and absorb steam steam inlet pipe 45 from extraction steam pipe 42, driving steam steam inlet pipe 43 is connected with absorption type heat regenerator driving steam inlet 2, absorbing steam steam inlet pipe 45 is connected with absorption type heat regenerator absorption steam inlet 8, steam gland steam exhauster 51 takes place to be connected with exhaust steam in steam turbine pipe 31 with absorption type heat regenerator generation steam (vapor) outlet 4, make the generation steam of absorption type heat regenerator enter condenser 18 with exhaust steam in steam turbine, the pressure of absorption type heat regenerator generation steam will guarantee that its exhaust steam side that can enter condenser 18 is condensed, condensate water outlet pipe 49 and condensate water outlet 3 is connected with back boiler condensate pipe 20, cooling water inlet pipe 46 is connected with condensate pipe 53 with the cooling water inlet 6 of absorption type heat regenerator, the back boiler condensate water that second level regenerator 23 is discharged enters absorption type heat regenerator and is heated, cooling water outlet pipe 47 is connected with condensate pipe 56 with the coolant outlet 7 of absorption type heat regenerator, make through the back boiler condensate water behind the absorption type heat regenerator heat temperature raising and return heat exchange cycle system, condensate pipe 54 is connected with condensate pipe 56 with condensate pipe 53 respectively, flow control valve 55 is set on condensate pipe 54, can regulates the back boiler condensate water water yield of the cooling water inlet pipe 46 of flowing through.
As shown in Figure 4: the two-stage absorption regenerator is set, cancel original third level regenerator 24 and fourth stage regenerator 25, disconnection first order extraction steam pipe 32 is connected with second level regenerator 23, picking out minimum pressure extraction steam pipe 41 from first order extraction steam pipe 32 links to each other with second level regenerator 23, for regenerator 23 supplies in the second level are drawn gas, pick out extraction steam pipe 42 from first order extraction steam pipe 32, pick out driving steam steam inlet pipe 43 respectively and absorb steam steam inlet pipe 45 from extraction steam pipe 42, driving steam steam inlet pipe 43 is connected with first order absorption type heat regenerator driving steam inlet 2, absorbing steam steam inlet pipe 45 is connected with first order absorption type heat regenerator absorption steam inlet 8, steam gland steam exhauster 51 takes place to be connected with exhaust steam in steam turbine pipe 31 with first order absorption type heat regenerator generation steam (vapor) outlet 4, make the generation steam of first order absorption type heat regenerator enter condenser 18 with exhaust steam in steam turbine, the pressure of first order absorption type heat regenerator generation steam will guarantee that its exhaust steam side that can enter condenser 18 is condensed, condensate water outlet pipe 49 and condensate water outlet 3 is connected with back boiler condensate pipe 20, cooling water inlet pipe 46 is connected with condensate pipe 53 with the cooling water inlet 6 of first order absorption type heat regenerator, and the back boiler condensate water that second level regenerator 23 is discharged enters first order absorption type heat regenerator and is heated; Pick out driving steam steam inlet pipe 44 from extraction steam pipe 42, driving steam steam inlet pipe 44 is connected with second level absorption type heat regenerator driving steam inlet 2, second level absorption type heat regenerator condensate water outlet pipe 50 and condensate water outlet 3 is connected with back boiler condensate pipe 20, second level absorption type heat regenerator generation steam gland steam exhauster 52 is connected with generation steam gland steam exhauster 51 with generation steam (vapor) outlet 4, make the generation steam of second level absorption type heat regenerator enter condenser 18 with exhaust steam in steam turbine, the pressure of second level absorption type heat regenerator generation steam will guarantee that its exhaust steam side that can enter condenser 18 is condensed, second level extraction steam pipe 33 is connected with absorption steam inlet 8, cooling water outlet pipe 47 is connected with second level absorption type heat regenerator cooling water inlet 6 with first order absorption type heat regenerator coolant outlet 7, make the back boiler condensate water of discharging from first order absorption type heat regenerator enter second level absorption type heat regenerator and continued heating, cooling water outlet pipe 48 is connected with condensate pipe 57 with the coolant outlet 7 of second level absorption type heat regenerator, make through the back boiler condensate water behind the second level absorption type heat regenerator continuation heat temperature raising and return heat exchange cycle system, condensate pipe 54 is connected with condensate pipe 57 with condensate pipe 53 respectively, flow control valve 55 is set on condensate pipe 54, can regulates the back boiler condensate water water yield of the cooling water inlet pipe 46 of flowing through.
Because the saturation temperature of solution is far above infeeding the saturation temperature that absorbs steam in the absorber 5 in the absorber 5 of first order absorption type heat regenerator, the back boiler condensate water that enters first order absorption type heat regenerator can be heated near solution saturation temperatures in its absorber 5, this temperature even may be higher than the saturation temperature of drawing gas in the second level.Because the saturation temperature of absorber 5 interior solution is far above the saturation temperature of the absorption steam that infeeds absorber 5 in the absorption type heat regenerator of the second level, the back boiler condensate water that enters second level absorption type heat regenerator can be heated near solution saturation temperature in its absorber 5, this temperature even may be higher than the saturation temperature that the fourth stage draws gas, because level V regenerator 26 has the deoxygenation function simultaneously concurrently, the present invention keeps level V regenerator 26, and the temperature that will return the back boiler condensate water of heat exchange cycle system after first order absorption type heat regenerator and the heating of second level absorption type heat regenerator is controlled at a little less than the back boiler condensate water by the temperature eventually of level V regenerator 26 heating, make the deoxygenation in level V regenerator 26 of back boiler condensate water, but the amount of drawing gas that infeeds in the level V regenerator 26 from fourth stage extraction steam pipe 35 can reduce significantly.Compare with the regenerator that generally uses at present, the present invention uses drawing gas of lower pressure to replace drawing gas of elevated pressures, when obtain with regenerator to the back boiler condensate water same add thermal effect the time, though the present invention has used the lower pressure of a greater number to draw gas, these complete expansions of drawing gas in steam turbine resulting generated energy that does work is reduced to some extent, but the elevated pressures that consideration is saved is drawn gas behind the generated energy that the complete expansion acting is increased in steam turbine, the present invention is under the condition that does not change power plant's production technology, when not increasing backheat circulation capital equipment capacity and fuel consumption, can increase generated output, perhaps when not reducing generated output, can reduce fuel consumption, make thermal efficiency of cycle that further raising, energy-saving and emission-reduction be arranged.

Claims (5)

1. the application of absorption type heat regenerator in heat exchange cycle system of power plant, described absorption type heat regenerator comprises generator (1), absorber (5), expansion mechanism (9) and working medium pump (10), wherein weak solution pipe (11) is connected with the solution side of absorber (5) with generator (1) respectively with concentrated solution pipe (12), on weak solution pipe (11), be provided with expansion mechanism (9), on concentrated solution pipe (12), be provided with working medium pump (10), generator (1) also is provided with and drives steam inlet (2), condensate water outlet (3) and generation steam (vapor) outlet (4), absorber (5) also is provided with cooling water inlet (6), coolant outlet (7) and absorption steam inlet (8), it is characterized in that: the driving steam inlet (2) of generator in the described absorption type heat regenerator (1) is connected with extraction steam pipe (42) by driving steam steam inlet pipe (43), extraction steam pipe (42) is connected with first order extraction steam pipe (32) on being arranged on turbine low pressure cylinder (16), condensate water outlet (3) is connected with back boiler condensate pipe (20) by condensate water outlet pipe (49), and the generation steam (vapor) outlet (4) of generator (1) is connected with exhaust steam in steam turbine pipe (31) by steam gland steam exhauster (51) takes place; The absorption steam inlet (8) of absorber (5) is connected with extraction steam pipe (42) by absorbing steam steam inlet pipe (45), cooling water inlet (6) is connected with first condensate pipe (53) by cooling water inlet pipe (46), and coolant outlet (7) is connected with second condensate pipe (56) by cooling water outlet pipe (47).
2. the application of absorption type heat regenerator according to claim 1 in heat exchange cycle system of power plant, it is characterized in that: first condensate pipe (53) and second condensate pipe (56) are connected to the 3rd condensate pipe (54) two ends, and flow control valve (55) is set on the 3rd condensate pipe (54).
3. the application of absorption type heat regenerator in heat exchange cycle system of power plant, described absorption type heat regenerator comprises generator (1), absorber (5), expansion mechanism (9) and working medium pump (10), wherein weak solution pipe (11) is connected with the solution side of absorber (5) with generator (1) respectively with concentrated solution pipe (12), on weak solution pipe (11), be provided with expansion mechanism (9), on concentrated solution pipe (12), be provided with working medium pump (10), generator (1) also is provided with and drives steam inlet (2), condensate water outlet (3) and generation steam (vapor) outlet (4), absorber (5) also is provided with cooling water inlet (6), coolant outlet (7) and absorption steam inlet (8), it is characterized in that: described absorption type heat regenerator is provided with two-stage, the driving steam inlet (2) of generator in the first order absorption type heat regenerator (1) is connected with extraction steam pipe (42) by driving steam steam inlet pipe (43), extraction steam pipe (42) is connected with first order extraction steam pipe (32) on being arranged on turbine low pressure cylinder (16), condensate water outlet (3) is connected with back boiler condensate pipe (20) by condensate water outlet pipe (49), and the generation steam (vapor) outlet (4) of generator (1) is connected with exhaust steam in steam turbine pipe (31) by steam gland steam exhauster (51) takes place; The absorption steam inlet (8) of absorber (5) is connected with extraction steam pipe (42) by absorbing steam steam inlet pipe (45), cooling water inlet (6) is connected with first condensate pipe (53) by cooling water inlet pipe (46), and coolant outlet (7) is connected with the cooling water inlet (6) of second level absorption type heat regenerator by cooling water outlet pipe (47); The steam inlet (2) of generator in the absorption type heat regenerator of the second level (1) drives steam steam inlet pipe (44) by another and is connected with extraction steam pipe (42), condensate water outlet (3) is connected with condensate water outlet pipe (49) in the first order absorption type heat regenerator by another condensate water outlet pipe (50), steam gland steam exhauster (52) takes place by another and is connected with generation steam gland steam exhauster (51) in the first order absorption type heat regenerator in the generation steam (vapor) outlet (4) of generator (1), the absorption steam inlet (8) of absorber in the absorption type heat regenerator of the second level (5) is connected with second level extraction steam pipe (33), and coolant outlet (7) is connected with the 4th condensate pipe (57) by another cooling water outlet pipe (48).
4. the application of absorption type heat regenerator according to claim 3 in heat exchange cycle system of power plant, it is characterized in that: the 3rd condensate pipe (54) two ends are connected with the 4th condensate pipe (57) with first condensate pipe (53) respectively, and flow control valve (55) is set on the 3rd condensate pipe (54).
5. according to claim 3 or 4 application of described absorption type heat regenerator in heat exchange cycle system of power plant: it is characterized in that: described first order extraction steam pipe (32) all is connected on the turbine low pressure cylinder (16) with second level extraction steam pipe (33), and the steam pressure in the second level extraction steam pipe (33) is higher than the steam pressure in the first order extraction steam pipe (32).
CN2010101207364A 2010-03-05 2010-03-05 Application of absorption type heat regenerator in regenerative circulation system of power plant Expired - Fee Related CN101788141B (en)

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WO2017068520A1 (en) * 2015-10-21 2017-04-27 Thermax Limited A regenerative feedwater heating system for a boiler
CN110748873B (en) * 2019-10-08 2021-04-16 河南理工大学 Exhaust steam heat regeneration system of power plant

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