CN203097975U

CN203097975U - Vapor Rankine and ammonia vapor Rankine combined cycle electricity generation device

Info

Publication number: CN203097975U
Application number: CN2013200421942U
Authority: CN
Inventors: 王海波
Original assignee: Nanjing Reclaimer Environmental Technology Co Ltd
Current assignee: Nanjing Reclaimer Environmental Technology Co Ltd
Priority date: 2013-01-27
Filing date: 2013-01-27
Publication date: 2013-07-31
Anticipated expiration: 2023-01-27

Abstract

The utility model relates to a vapor Rankine and ammonia vapor Rankine combined cycle electricity generation device. Ammonia vapor in an ammonia vapor Rankine cycle is used for cooling vapor in a vapor Rankine cycle, latent heat of vaporization of the vapor in the vapor Rankine cycle is recovered to be used for electricity generation of the ammonia vapor Rankine cycle, and accordingly the vapor Rankine cycle and the ammonia vapor Rankine cycle are compounded together to form the enforceable combined cycle device. Meanwhile, the safety difficult problem that the ammonia vapor Rankine cycle recovers waste heat of exhaust gas is solved, the exhaust gas temperature is effectively reduced, low-temperature corrosion of the exhaust gas is avoided, and waste gas, waste water and waste heat of waste vapor in a vapor Rankine cycle system can be recycled effectively. The vapor Rankine and ammonia vapor Rankine combined cycle electricity generation device not only can be used for energy-saving transformation of an existing set, but also can be used for design and construction of a new set, especially is suitable for new construction, extension and rebuilding of an electricity generation set in areas such as water-deficient areas and electricity-deficient areas, and is significant in economic benefits, social benefits and environment protection benefits.

Description

Steam Rankine-ammonia steam Rankine combined cycle generating unit

Technical field

The present invention relates to a kind of steam Rankine-ammonia steam Rankine combined cycle generating unit, specifically belong to the thermal power plant field of power equipment technology.

Background technique

With the water vapor is the thermal power plant of working medium, be carrying out on a large scale heat energy is transformed into mechanical energy, and the factory that transforms mechanical energy into electricity again.The circulation that the power station is used is very complicated, yet in essence, mainly the Rankine cycle of being made up of equipment such as boiler, steam turbine, vapour condenser, water pumps is finished, its working principle is: feedwater is sent into boiler earlier after the feed water pump pressurization, water is heated the superheated vapor of vaporization, formation High Temperature High Pressure in boiler, the superheated vapor acting of in steam turbine, expanding, become the exhaust steam of low-temp low-pressure, enter vapour condenser at last and be condensed into condensed water, through water pump condensed water is sent into boiler again and carry out new circulation.The complex loops of using as for the thermal power plant only on the Rankine cycle basis, in order to improve the thermal efficiency, is improved and the new circulation that forms is the backheat circulation, and the medium of backheat is a water.Rankine cycle has become the basic circulation of modern steam power plant.

Modern big-and-middle-sized steam power plant all adopts the heated feed water backheat circulation of drawing gas without any exception, employing is drawn gas behind the backheat heated feed water, feed temperature is improved, thereby improved the heating mean temperature, except having improved thermal efficiency of cycle significantly, though specific steam consumption increases to some extent, owing to draw gas step by step the steam discharge rate is reduced, this ratio that helps actual acting amount and theoretical acting amount i.e. this circuit internal efficiency ratio η _OiRaising, solved the difficulty of large steam turbine exhaust stage blade negotiability restriction simultaneously, the vapour condenser volume also can correspondingly reduce.But still discharge a large amount of latent heats of vaporization when steam condenses in vapour condenser, need a large amount of water or air to cool off, promptly wasted heat, caused thermo-pollution, wasted electric energy, water resources again.The a large amount of latent heat of vaporization that discharges when therefore how effectively to utilize vapor condenses in the vapour condenser is worth further investigation.

Give off a large amount of flue gases in the station boiler production process, wherein the heat of recyclable utilization is a lot.Also need in the station boiler running to ensure that by continuous blowdown and periodical blowdown the water quality of boiler meets demand for security, must remove the oxygen in the boiler feed water, to avoid the corrosion to steam generator system simultaneously.Thermal deaerator is the one preferred technique of station boiler at present, and oxygen-eliminating device is carried a large amount of working steams secretly and entered atmosphere in work.Owing to contain a large amount of heats and good water quality in boiler platoon water and the deaerator exhaust,, and environment polluted if directly discharging will cause the great energy and the wasting of resources.Though this two-part residual heat resources waste is huge, recycling has bigger difficulty, and its main cause is: the quality of (1) waste heat is lower, does not find the method for effectively utilizing; (2) waste heat of reclaimer's three parts is often made bigger change to the original thermodynamic system of boiler, has certain risk; (3) thermal balance question is difficult to tissue, is difficult to all directly utilize in inside plants, often needs outwards to seek suitable hot user, and hot user often have fluctuation with heat load, thereby limited the versatility of recovery method.

Gu Wei etc. (present Research and the development trend [J] of low temperature heat energy generating. thermal power engineering .2007.03.Vol.22, No.2.) introduced the present Research and the development trend of domestic and international low temperature heat energy generation technology.From the development of low temperature heat energy generation technology research in recent years, research work mainly concentrates on aspects such as the improvement of the research of power cycle working medium and cyclic process and optimal controls.Kalina circulation, ammonia absorption type power refrigeration combined cycle etc. can reach the capacity usage ratio higher than simple cycle in theory.Significant when when considering, becoming factor to the influencing of system based on the generating of the thermodynamic (al) low temperature heat energy of finite time, may realize the maximization that the energy of system utilizes.Improving generating efficiency and environmental protection is the core content of low temperature pyroelectric technology.The Kalina circulation of mentioning in the literary composition, ammonia absorption type power refrigeration combined cycle scheduling theory merit attention.

The above-mentioned card Linne power generation technology of mentioning also has its intrinsic shortcoming: have inflammable, explosive characteristics such as poisonous as ammonia, when boiler or industrial furnace back-end ductwork utilize fume afterheat tissue card Linne circulating generation, dust etc. in the flue gas must be considered to the leakage that the wearing and tearing that are arranged in the heat exchanger in the flue, corrosion etc. cause, the explosion protection of drawing thus and protection of environment and job site etc. must be considered; With the ammonia water mixture is the card Linne circulation of working medium, and the ammonia in the ammoniacal liquor is inflammable, explosive, poisonous medium.This is card Linne power generation technology reclaims dust-laden, must solve when the fume afterheat of corrosive deposit is arranged in electric power station system a difficult problem.

Therefore how to utilize the thermomechanics basic law in steam Rankine cycle thermal power plant, use for reference the innovative approach that combined cycle scheduling theories such as thinking and Rankine-Kalina are organized in compound Rankine cycle, reservation is based on the advantage of the power plant technology of Rankine cycle principle, inquire into new combined cycle theory, really find the new way that increases substantially the thermodynamic cycle power plant thermal efficiency, become the difficult point of this area research.

Summary of the invention

Purpose of the present invention is for solving the shortcoming that technology such as above-mentioned steam Rankine cycle and the circulation of card Linne exist, a kind of steam Rankine-ammonia steam Rankine combined cycle generating unit is proposed, can substitute traditional steam Rankine cycle unit, the difficult problem that a large amount of latent heat of vaporization that has discharged when having solved vapor condenses in the key issue of ammonia steam Rankine cycle unit safety operation and the vapour condenser simultaneously reclaims, adopt vapour condenser operation under positive pressure mode, the latent heat of vaporization in the recovered steam Rankine cycle during vapor condenses is used for low-temperature end ammonia steam Rankine cycle generating, thereby realize effectively improving the thermal efficiency of whole Combined Cycle Unit, finally reach energy-saving and cost-reducing, improve the purpose of system thermal efficiency.

The objective of the invention is to realize by following measure: a kind of steam Rankine-ammonia steam Rankine combined cycle generating unit, this device comprises steam Rankine cycle, the Rankine cycle of ammonia steam, it is characterized in that:

Described steam Rankine cycle is meant the saturated vapour 2 that is come out by boiler body 1, forms superheated vapor 3-1 through superheater 3, sends into steam turbine 4 and drives steam-driven generator 21 generatings; The exhaust steam 5 that steam turbine 4 comes out forms water of condensation 6 through superheater 9, condenser/evaporator 10, and water of condensation 6 produces saturated vapour again through feed water pump 7, feed water preheater 8, boiler body 1, thereby forms steam Rankine cycle loop.

The Rankine cycle of described ammonia steam, be meant that ammoniacal liquor 11 sends into condenser/evaporator 10, cooling vaporizer 13, ammonia evaporator 14 respectively or successively through ammoniacal liquor recycle pump 12, the ammonia steam that produces forms ammonia superheated vapor 16 through superheater 9, enter ammonia steam turbine 17 again, drag 20 generatings of ammonia generator, the exhaust steam of discharging from ammonia steam turbine 17 forms ammoniacal liquor 11 through ammonia condenser 18 coolings, enters ammoniacal liquor recycle pump 12 again, thereby forms ammonia steam Rankine cycle loop.

Described ammoniacal liquor 11 is the ammonia of one-component, or be low boiling component with ammonia, mixed solution such as ammonia-aqueous solution, ammonia-ammonium thiocyanate solution or ammonia-calcium chloride solution etc. that high boiling component is absorbing agent.

When described ammoniacal liquor adopts multicomponent solution, ammoniacal liquor 11 through ammoniacal liquor recycle pump 12 or and regenerator 15 send into condenser/evaporator 10, cooling vaporizer 13, ammonia evaporator 14 successively or respectively, the lean solution that forms is returned ammonia condenser 18 through regenerator 15, the pipeline 19 that backflows, the ammonia steam that produces forms ammoniacal liquor 11 through superheater 9, ammonia steam turbine 17, ammonia evaporator 14, ammonia condenser 18, return ammoniacal liquor recycle pump 12, thereby form ammonia steam Rankine cycle loop.

The pressure of the exhaust steam 5 that described steam turbine 4 is discharged is higher than atmospheric pressure.

Described steam Rankine cycle loop and ammonia steam Rankine cycle loop by superheater 9, condenser/evaporator 10 or and cooling vaporizer 13 or and ammonia evaporator 14, with Rankine cycle of temperature end steam and organic being combined with each other of low-temperature end ammonia steam Rankine cycle, the latent heat of vaporization that discharges during the vapor condensation of high efficiente callback temperature end steam Rankine cycle is used for low-temperature end ammonia steam Rankine cycle generating.

The heat transferring medium ammoniacal liquor of described cooling vaporizer 13 and flue gas adopt the separated type heat exchange mode, cooling vaporizer 13 comprises vaporizer 13-1, condenser 13-2, wherein vaporizer 13-1 is arranged in the flue 23, condenser 13-2 is arranged in outside the flue 23, and phase-change working substance wherein adopts water or other suitable materials; Phase-change working substance absorbs flue gas in vaporizer 13-1 heat produces saturated vapour, saturated vapour is as the thermal source of ammoniacal liquor, by condenser 13-2 and ammoniacal liquor 11 wall-type heat exchanges, the cooling back forms condensation water and produces steam again by the heat of vaporizer 13-1 absorption flue gas again, thereby forms the interior circulation loop of phase-change working substance; Phase-change working substance adopts natural circulation or pump circulation mode.

Be provided with exhaust steam regenerator 22: the ammonia steam that ammonia evaporator 14 produces is got back to ammonia evaporator 14 through exhaust steam regenerator 22, superheater 9, ammonia steam turbine 17, exhaust steam regenerator 22, ammonia evaporator 14, ammonia condenser 18, ammoniacal liquor recycle pump 12, thereby forms ammonia steam Rankine cycle loop.

Be provided with and the supporting makeup Water System of steam Rankine cycle system: the distilled water 24 in the distilled water tank 25, behind

small pump

26,27 deoxygenations of normal temperature oxygen-eliminating device, mixed bed 28 desalinations, mend the steam Rankine cycle system.

Described feed water preheater 8, ammonia superheater 9, condenser/evaporator 10, cooling vaporizer 13, ammonia evaporator 14, exhaust steam regenerator 22 can be provided with one or more respectively, adopt series, parallel or series-parallel connection mode to connect.

The air 30 that gas fan 31 is sent here enters air preheater 32, form hot air 33, enter fuel-burning equipment 34 and participate in burning, the high-temperature flue gas of generation is discharged after reducing temperature through boiler body 1, superheater 2, feed water preheater 8, air preheater 32, vaporizer 13-1.

Described ammonia condenser 18 is provided with according to routine techniques, adopts water or air etc. as cooling medium.

The heat-exchanging element of mentioned aforementioned device can adopt tubulation, fin tube, coiler or spiral groove pipe among the present invention, or adopts the pipe of other augmentation of heat transfer measures or the hollow cavity heat-exchanging element of other patterns.

The a little higher than flue gas acid dew point temperature of wall surface temperature of control vaporizer 13-1 heat exchanger surface, or the cold end corrosion of adopting corrosion-resistant material effectively to alleviate flue gas can effectively reduce temperature of exhaust fume, when avoiding the flue gas low-temperature corrosion, the high efficiente callback fume afterheat.

Unaccounted equipment and standby system thereof, pipeline, instrument, valve among the present invention, be incubated, have the known mature technologies of employing such as regulatory function bypass facility and carry out supporting.

Be provided with regulating controller with system support of the present invention, adopt the known ripe control technique of existing steam Rankine cycle power station, Cheng Shi cycle power plant or gas-steam combined cycle power plant to carry out supporting, make steam Rankine-Ka Linne combined cycle generating unit energy economy, safety, high thermal efficiency operation, reach energy saving purposes.

The present invention has following advantage compared to existing technology:

1, energy-saving effect is remarkable: the steam Rankine-Ka Linne combined cycle generating unit of the present invention's design, be different from traditional based on the Rankine cycle principle the steam Rankine cycle and utilize the card Linne circuit combined cycle system of vapor plume as thermal source, adopt vapour condenser operation under positive pressure mode, with turbine discharge as card Linne circuit thermal source, utilize the utilization of card Linne circulatory system centering low-temperature heat source that more high-efficiency characteristics is arranged, with ingenious being combined with each other of vaporizer in vapour condenser and the circulation of card Linne, the latent heat of vaporization of steam is utilized effectively, except steam sensible heat utilization etc. than the steam Rankine cycle has higher efficient, only utilize the latent heat of vaporization of steam to generate electricity this piece just nearly more than the 50 degree/ton steam, the absolute thermal efficiency of whole system so improve more than 2%; Move because of back pressure adopts the malleation mode, steam turbine outlet exhaust steam can guarantee certain degree of superheat, and the steam first pressing of newly-built unit can be adopted overcritical or ultra supercritical pressure, further improves the power generation cycle thermal efficiency.

2, low equipment investment, operating cost descend significantly:

(1) eliminated that traditional vapour condenser negative pressure operation technique inevitably leaks gas, water leakage phenomenon, need not in the Rankine cycle loop, to be provided with oxygen-eliminating device, air ejector, the loss of steam and water of having avoided operations such as traditional oxygen-eliminating device, air ejector to cause; Avoided conventional art to reclaim the pollution and the loss of steam and water of water of condensation, only need replenish the water loss that the turbine shaft leak sealing vapour of minute quantity causes, can mend into system by outsourcing or self-control distilled water;

(2) because of malleation, closed operation, avoided oxygen corrosion, the scaling phenomenon of traditional Rankine cycle steam generator system, system's loss of steam and water descends significantly, need not to be equipped with huge, complicated chemical water treatment system, the operating cost of water treatment system descends significantly, and absolute value can reduce by 90%;

(3) because of much smaller than traditional vapour condenser of the exhaust steam specific volume of steam turbine, the volume of steam turbine can reduce significantly, vapour condenser volume ratio conventional art much smaller, thereby the relative price of steam turbine, condenser apparatus reduces a lot.

3, the three wastes of power plant are realized integrated utilization: when the heat exchanger that back-end ductwork is provided with adopts phase-change heat-exchanger, waste heat that can the high efficiente callback flue gas, temperature of exhaust fume can be reduced to about 120 ℃, when the phase-change heat-exchanger vaporizer adopted resistant material, temperature of exhaust fume can reduce more, reaches about 85 ℃, operation to system for desulfuration and denitration is very favourable, when effectively avoiding the flue gas low-temperature corrosion, the heat of recovery is used to card Linne circulatory system efficient power generation, more meets the cascaded utilization of energy principle.Waste heats such as the waste water that the steam Rankine cycle system produces, waste vapour all can be included the card Linne circulatory system in and recycle.Fundamentally eliminated the influence to whole unit circulation system of other waste gas, waste water, waste vapour waste heat recovering device, realized the integrated utilization of the real meaning of entire power plant system waste heat, effects such as water saving, joint vapour, economize on electricity are obvious.

4, safety in operation obviously improves:

(1) back pressure because of steam turbine in the steam Rankine cycle adopts the malleation mode to move, steam turbine outlet exhaust steam can guarantee certain degree of superheat, overcome the design that traditional Rankine cycle power generator turbine exhaust stage blade brings because of wet vapor, operation and safety problem, steam turbine back pressure operation under positive pressure, outlet steam is superheated vapor, fundamentally eliminated the problem design that last stage vane of steam turbine brings because of wet vapor in traditional steam Rankine cycle, make and operation problem, the operating conditions of steam turbine is optimized, and obviously improves before the vibration of steam turbine generator set;

(2) the oxygen corrosion Safety performance of steam boiler system is obviously improved, and has avoided traditional steam Rankine cycle generator set because of the operation of vapour condenser negative pressure, and air unavoidably bleeds and the oxygen corrosion that service system causes is endangered;

(3) scale hazard of steam Rankine cycle system is eliminated, and has effectively alleviated the generation of accidents such as the overheated booster of heating surface, and the operating conditions of superheater obviously improves, and Security obviously improves;

(4) than traditional card Linne circulating technology, when adopting preferred version, need not in flue, to be provided with the heat exchanger of dividing wall type, the better split type phase-change heat-exchanger condenser separated type of Security that adopts in generation reclaims the heat of flue gas, and numerous safety problems that wearing and tearing, the corrosion that causes because of dust in flue gas, aggressive medium etc. causes ammonia water mixture to follow the flue gas contact to cause are solved at all; Ammonia water mixture carries out wall-type heat exchange in the phase-change heat-exchanger condenser, because nontoxic, the non-combustion-supporting material of water vapour, non-good characteristics such as flammable, fire-retardant, even leak, accident also obtains handling easily, control, the vaporizer in the circulation of card Linne or and the operating conditions of superheater obviously improve;

(5) because steam Rankine cycle steam discharge adopts malleation, therefore can guide to the safe place of adopting the reliable protection measure by pipeline, the card Linne circulatory system (comprising the phase-change heat-exchanger condenser) can independently be arranged in the safe and reliable protective zone and be equipped with reliable safety installations, the problems of avoiding following the steam Rankine cycle system directly to be staggered in together and causing, the Security of the card Linne circulatory system is reliably guaranteed, for its industrial applications further eliminates safe hidden trouble.

Description of drawings

Fig. 1 is a kind of steam Rankine of the present invention-ammonia steam Rankine combined cycle generating unit schematic flow sheet.

Among Fig. 1: 1-boiler body, 2-saturated vapour, 3-superheater, the 3-1-superheated vapor, 4-steam turbine, 5-exhaust steam, the 6-water of condensation, 7-feed water pump, 8-feed water preheater, the 9-superheater, 10-condenser/evaporator, 11-ammoniacal liquor, 12-ammoniacal liquor recycle pump, 13-cools off vaporizer, 13-1-vaporizer, the 13-2-condenser, 14-ammonia evaporator, 15-regenerator, 16-ammonia superheated vapor, 17-ammonia steam turbine, 18-ammonia condenser, the 19-liquid that backflows, 20-ammonia generator, 21-steam-driven generator, 22-exhaust steam regenerator, 23-flue, 24-distilled water, the 25-distilled water tank, 26-small pump, 27-oxygen-eliminating device, 28-mixed bed, the 29-water pipeline that backflows, the 30-air, the 31-gas fan, 32-air preheater, 33-fuel-burning equipment.

Embodiment

Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.

Embodiment 1.

As shown in Figure 1, a kind of steam Rankine-ammonia steam Rankine combined cycle generating unit, this device comprises steam Rankine cycle, ammonia steam Rankine cycle system, specific embodiment is as follows:

Ammonia water mixture is adopted in the Rankine cycle of ammonia steam.

In the described ammonia steam Rankine cycle loop, condenser/evaporator 10, cooling vaporizer 12, ammonia evaporator 14 adopt the parallel running mode, ammoniacal liquor 11 is through ammoniacal liquor recycle pump 12, regenerator 15, condenser/evaporator 10, ammoniacal liquor recycle pump 12, ammonia evaporator 14, exhaust steam regenerator 22, and ammoniacal liquor recycle pump 12,, condenser/evaporator 10, the ammonia steam that produces forms ammoniacal liquor 11 through superheater 9, ammonia steam turbine 17, exhaust steam regenerator 22, ammonia evaporator 14, ammonia condenser 18, enter ammoniacal liquor recycle pump 12 again, thereby form ammonia steam Rankine cycle loop.

The heat transferring medium ammoniacal liquor of described cooling vaporizer 13 and flue gas adopt the separated type heat exchange mode, cooling vaporizer 13 comprises vaporizer 13-1, condenser 13-2, wherein vaporizer 13-1 is arranged in the flue 23, and condenser 13-2 is arranged in outside the flue 23, and phase-change working substance wherein adopts water; Phase-change working substance absorbs flue gas in vaporizer 13-1 heat produces saturated vapour, saturated vapour in condenser 13-2 as the thermal source of ammoniacal liquor, by condenser 13-2 and ammoniacal liquor 11 wall-type heat exchanges, the cooling back forms condensation water again by vaporizer 13-1, the heat that absorbs flue gas produces steam again, thereby forms the interior circulation loop of phase-change working substance; Phase-change working substance adopts natural circulation.

small pump

Described feed water preheater 8, superheater 9, condenser/evaporator 10, cooling vaporizer 13, ammonia evaporator 14, exhaust steam regenerator 22 can be provided with one or more respectively, adopt series, parallel or series-parallel connection mode to connect.

Though the present invention with preferred embodiment openly as above, they are not to be used for limiting the present invention, anyly are familiar with this skill person, without departing from the spirit and scope of the invention, when doing various variations or retouching, belong to the present invention's protection domain equally certainly.Therefore protection scope of the present invention should with the application claim was defined is as the criterion.

Claims

1. steam Rankine-ammonia steam Rankine combined cycle generating unit, this device comprises steam Rankine cycle and ammonia steam Rankine cycle system, it is characterized in that:

The pressure of the exhaust steam (5) that steam turbine (4) is discharged in the described steam Rankine cycle is higher than atmospheric pressure;

Described steam Rankine cycle is meant the saturated vapour (2) that is come out by boiler body (1), forms superheated vapor (3-1) through superheater (3), sends into steam turbine (4) and drives steam-driven generator (21) generating; The exhaust steam (5) that steam turbine (4) comes out through superheater (9) or and condenser/evaporator (10), ammonia cooling by the Rankine cycle of ammonia steam forms water of condensation (6), water of condensation (6) produces saturated vapour again through feed water pump (7), boiler body (1), thereby forms steam Rankine cycle loop;

Described ammonia steam Rankine cycle loop is provided with superheater (9): ammoniacal liquor (11) is through ammoniacal liquor recycle pump (12), condenser/evaporator (10), the ammonia steam that produces forms ammonia superheated vapor (16) through superheater (9), enter ammonia steam turbine (17) again, drag ammonia generator (20) generating, the exhaust steam of discharging from ammonia steam turbine (17) forms ammoniacal liquor (11) through ammonia condenser (18) cooling, enter ammoniacal liquor recycle pump (12) again, thereby form ammonia steam Rankine cycle loop; Or ammoniacal liquor (11) is through ammoniacal liquor recycle pump (12), ammonia evaporator (14), the ammonia steam that produces forms ammonia superheated vapor (16) through superheater (9), enter ammonia steam turbine (17) again, drag ammonia generator (20) generating, the exhaust steam of discharging from ammonia steam turbine (17) forms ammoniacal liquor (11) through ammonia condenser (18) cooling, enter ammoniacal liquor recycle pump (12) again, thereby form ammonia steam Rankine cycle loop; Or ammoniacal liquor (11) is through ammoniacal liquor recycle pump (12), cooling vaporizer (13), the ammonia steam that produces forms ammonia superheated vapor (16) through superheater (9), enter ammonia steam turbine (17) again, drag ammonia generator (20) generating, the exhaust steam of discharging from ammonia steam turbine (17) forms ammoniacal liquor (11) through ammonia condenser (18) cooling, enter ammoniacal liquor recycle pump (12) again, thereby form ammonia steam Rankine cycle loop.

2. device according to claim 1 is characterized in that:

Be provided with feed water preheater (8):

Saturated vapour (2) by boiler body (1) comes out forms superheated vapor (3-1) through superheater (3), sends into steam turbine (4) and drives steam-driven generator (21) generating; The exhaust steam (5) that steam turbine (4) comes out through superheater (9) or and condenser/evaporator (10), ammonia cooling by the Rankine cycle of ammonia steam forms water of condensation (6), water of condensation (6) is through feed water pump (7), feed water preheater (8), boiler body (1), produce saturated vapour again, thereby form steam Rankine cycle loop.

3. device according to claim 2 is characterized in that:

Be provided with regenerator (15):

The lean solution that the part or all of vaporizer of condenser/evaporator (10), ammonia evaporator (14), cooling vaporizer (12) produces is got back to ammonia condenser (18) through regenerator (15), the pipeline that backflows (19); Ammoniacal liquor (11) is through ammoniacal liquor recycle pump (12), regenerator (15) or and condenser/evaporator (10) or and ammonia evaporator (14) or and the part or all of generation ammonia steam of cooling vaporizer (12).

4. device according to claim 3 is characterized in that:

Be provided with exhaust steam regenerator (22):

Ammoniacal liquor (11) forms ammoniacal liquor (11) through the ammonia steam that ammoniacal liquor recycle pump (12), ammonia evaporator (14) produce through exhaust steam regenerator (22), superheater (9), ammonia steam turbine (17), exhaust steam regenerator (22), ammonia evaporator (14), ammonia condenser (18), enter ammoniacal liquor recycle pump (12) again, thereby form ammonia steam Rankine cycle loop; Or ammoniacal liquor (11) forms ammoniacal liquor (11) through the ammonia steam that ammoniacal liquor recycle pump (12), condenser/evaporator (10) produce through exhaust steam regenerator (22), superheater (9), ammonia steam turbine (17), exhaust steam regenerator (22), condenser/evaporator (10), ammonia condenser (18), enter ammoniacal liquor recycle pump (12) again, thereby form ammonia steam Rankine cycle loop.

5. according to the described device of one of claim 1 to 4, it is characterized in that:

Flue gas in the described cooling vaporizer (13) adopts the separated type heat exchange mode with ammoniacal liquor (11): cooling vaporizer (13) comprises vaporizer (13-1), condenser (13-2), wherein vaporizer (13-1) is arranged in the flue (23), and condenser (13-2) is arranged in outside the flue (23); Phase-change working substance absorbs flue gas in vaporizer (13-1) heat produces saturated vapour, saturated vapour in condenser (13-2) as the thermal source of ammoniacal liquor, by condenser (13-2) and ammoniacal liquor (11) wall-type heat exchange, the cooling back forms condensation water again by vaporizer (13-1), the heat that absorbs flue gas produces steam again, thereby forms the interior circulation loop of phase-change working substance.

6. according to the described device of one of claim 1 to 4, it is characterized in that:

Be provided with makeup Water System: the distilled water (24) in the distilled water tank (25), mend the steam Rankine cycle system through small pump (26), normal temperature oxygen-eliminating device (27).

7. according to the described device of one of claim 1 to 4, it is characterized in that:

Be provided with mixed bed (23): the distilled water (24) in the distilled water tank (25), mend the steam Rankine cycle system through small pump (26), normal temperature oxygen-eliminating device (27), mixed bed (28).

8. according to the described device of one of claim 1 to 4, it is characterized in that:

Be provided with air preheater (32): the air (30) that gas fan (31) is sent here forms hot air (33) through air preheater (32), enter fuel-burning equipment (34) and participate in burning, the high-temperature flue gas of generation through boiler body (1), superheater (2) or and feed water preheater (8), air preheater (32) or and vaporizer (13-1) discharge after reducing temperature.

9. device according to claim 4 is characterized in that:

Described superheater (3), feed water preheater (8), superheater (9), condenser/evaporator (10), cooling vaporizer (13), ammonia evaporator (14), air preheater (32), regenerator (15), exhaust steam regenerator (22) can be provided with one or more respectively, adopt series, parallel or series-parallel connection mode to connect.