CN101709661A

CN101709661A - Waste heat generating system and generating method

Info

Publication number: CN101709661A
Application number: CN200910254339A
Authority: CN
Inventors: 施设; 周守航; 陈克明; 张西鹏; 黄衍林; 杨源满; 林杨
Original assignee: Zhongye Jingcheng Engineering Technology Co Ltd
Current assignee: Beijing Jingcheng Kelin Environmental Protection Technology Co., Ltd; MCC Capital Engineering and Research Incorporation Ltd
Priority date: 2009-12-11
Filing date: 2009-12-11
Publication date: 2010-05-19
Anticipated expiration: 2029-12-11
Also published as: CN101709661B

Abstract

The invention discloses a waste heat generating system and a generating method. The generating system generates power by using the heat energy stage-stored in a multi-stage heat energy storage system; the generating system comprises a generator, a steam turbine, an ammonia turbine and an absorption heat pump; the multi-stage heat energy storage system delivers steam to the steam turbine, and the steam turbine converts the heat energy into dynamic mechanical energy and drives the generator to convert the mechanical energy into electrical energy; the absorption heat pump adopts ammonia-water as working medium, and converts the low-quality heat energy of the steam at the tail end of an output of the steam turbine into higher-quality heat energy; and the heat energy storage system provides a high-quality driving heat source for the heat pump so that a large amount of mixed solution of concentrated ammonia-water is evaporated under high pressure to form high-pressure saturated ammonia, and the high-pressure saturated ammonia drives the ammonia turbine to convert the pressure produced by the ammonia into mechanical energy, and delivers the mechanical energy to the generator. The generating system and the generating method overcome the defects that the heat-electricity conversion efficiency in the conventional waste heat generating process is low and the like, and achieve the purposes of high quality, high efficiency and low consumption.

Description

Afterheat generating system and electricity-generating method

Technical field

The present invention relates to the Ferrous Metallurgy process waste heat and recycle the field; Refer in particular to a kind of afterheat generating system that utilizes the waste heat that produces in the slag treatment process to generate electricity that relates to.

Background technique

Ferrous Metallurgy process---operations such as blast furnace ironmaking, pneumatic steelmaking, annual 30～40% a large amount of smelted furnace cinders of ratio output with output of steel, the whole world is with the quantity output in more than one hundred million tons of every year, and its heat energy of taking away is amounted to more than 2,000 ten thousand tons of standard coals, amounts to 15,000,000,000 yuan of RMB.If its effective utilization can be equivalent to the energy that the annual whole world consumes more than 2,000 ten thousand tons of standard coals less, will be huge contributions to human energy-saving and environmental protection.

Because electric energy is the most high-quality energy of energy utilization, the tradition afterheat generating system adopts steam turbine that the pressure of high pressure steam can be converted to the motivational drive generator for electricity generation usually, the terminal steam of steam turbine adopts cooling tower circulation cooling, make its terminal vapor condensation become water and get back to the boiler blow-down water system, a large amount of latent heats of condensation that terminal vapor condensation process produces are taken away by cooling tower and are diffused, this heat accounts for more than 50% of total amount of heat usually, and this is the low main cause of traditional hot electrical efficiency.

In sum, the terminal thermal waste of traditional turbine exhaust heat power generation system is serious, and heat-photoelectric transformation efficiency is low.

Summary of the invention

The technical problem to be solved in the present invention is: a kind of afterheat generating system and electricity-generating method are provided, solve the low inferior deficiency of traditional cogeneration process heat-photoelectric transformation efficiency, reach high-effect, low consumption, few heat energy diffuses purpose.

Technical solution of the present invention is: a kind of afterheat generating system, this power generation system is to utilize the heat energy that stores in the thermal energy storage system to generate electricity, this power generation system comprises generator, steam turbine, ammonia turbine and absorption heat pump, described multistage thermal energy storage system is to the steam turbine delivering vapor, steam turbine is converted into the dynamic power machine energy with heat energy, and the drive generator is converted into electric energy with mechanical energy; This absorption heat pump adopts ammonia-water to make working medium, the low-quality heat energy that described steam turbine is exported terminal steam is converted into higher quality heat energy, and provide high-quality driving heat source for described heat pump by described thermal energy storage system, the concentrated ammonia liquor mixed solution is under high pressure evaporated in a large number form the saturated ammonia of high pressure, drive the ammonia turbine and can be converted to mechanical energy, export to generator with the mechanical energy merging that steam turbine produces with the pressure that ammonia is produced.

The present invention also proposes a kind of method for power generation by waste heat, and the thermal energy storage system is to the steam turbine delivering vapor, and steam turbine is converted into the dynamic power machine energy with heat energy, and the drive generator is converted into electric energy with mechanical energy; The absorption heat pump that utilization is made working medium with ammonia-water is converted into higher quality heat energy with the low-quality heat energy that described steam turbine exports terminal steam, and provide the high temperature driven thermal source to this heat pump by this thermal energy storage system, the concentrated ammonia liquor mixed solution is under high pressure evaporated in a large number form the saturated ammonia of high pressure, drive the ammonia turbine pressure that ammonia produces can be converted to mechanical energy, and export to generator with the mechanical energy merging that steam turbine produces.

Characteristics of the present invention and advantage are as follows:

1. afterheat generating system of the present invention adopts absorption heat pump, makes the heat energy lifting of the terminal low-quality tail gas of steam turbine be the high-quality heat energy that utilizes, and has solved the problem of traditional steam turbine with cooling tower heat radiation thermal waste.

2. heat pump makes the terminal condensing water temperature of steam turbine and negative pressure lower, makes the steam turbine energy conversion efficiency higher.

3. ammonia-water is made the absorption heat pump of working medium, is recovered as the high-quality heat energy except that promoting low side heat energy, and the high temperature that evaporates in the generator, the moving ammonia turbine of high pressure ammonia gas drive realize that ammonia, steam turbine merge generating, make heat-photoelectric transformation efficiency higher.

4. terminal low condensing water temperature and replenish the heat exchange to tail gas of new water, flushing cinder water, dust sparge water makes the exhaust temperature of getting back to the circulatory system lower, when being applied to slag treatment, can make tapping temperature lower, and the system synthesis thermal loss still less.

5. the high-quality heat energy that reclaims among the present invention can directly utilize, and low-quality heat energy and the tail gas that in the past diffused promote by means of heat pump and utilizes, thereby has improved the comprehensive utilization ratio of heat energy.

Description of drawings

Fig. 1 is the structure and the handling process schematic representation of a specific embodiment of afterheat generating system of the present invention.

Fig. 2 is the structure and the handling process schematic representation of a concrete Application Example of afterheat generating system of the present invention.

The drawing reference numeral explanation:

100, slag handling system 300, residual neat recovering system 500, afterheat generating system

101, liquid slag 102, fecal iron separator 103, slag guide pipe

104, slag buffer memory storehouse (vapor recovery warehouse) 105, high-pressure aerial fog nozzle

106, breaker 107, plate type heat exchanger 108, auger heat exchange conveyer

109, fluid-bed heat exchanger 110, drag-out slag car 111, comb hydrophone

112, water reservoir 113, dirt ash sparge water pipeline 114, dirt ash flooding nozzle

201, first order heat exchanger 202, second level heat exchanger 203, third level heat exchanger

204, level pressure blower fan 205, circulating fan 206, tail gas heat exchanger

207, filter 301, high pressure drum 302, middle pressure thermal accumulator

303, low pressure bag 304, pressure regulator valve 305, pressure regulator valve

306, oxygen-eliminating device 307,311,312, liquid pump 308～310, liquid jetting device

501, gas-turbine 502, generator 503, stram condenser

511, ammonia turbine 512, generator 513, adsorber

514, heat exchanger 515,515 ', pressure regulator valve 516, ammonia superheater

517, throttle valve 518, pump 520, steam superheater

521, pressure regulator valve

Embodiment

Following conjunction with figs. and specific embodiment are described in further detail the specific embodiment of the present invention.

The present invention proposes a kind of afterheat generating system, this power generation system is to utilize the heat energy that classification stores in the multistage thermal energy storage system to generate electricity, this power generation system comprises generator, steam turbine, ammonia turbine and absorption heat pump, described multistage thermal energy storage system is to the steam turbine delivering vapor, steam turbine is converted into the dynamic power machine energy with heat energy, and the drive generator is converted into electric energy with mechanical energy; This absorption heat pump adopts ammonia-water to make working medium, the low-quality heat energy lifting that described steam turbine is exported terminal steam is higher quality heat energy, and provide high-quality driving heat source for described heat pump by described thermal energy storage system, the concentrated ammonia liquor mixed solution is under high pressure evaporated in a large number form the saturated ammonia of high pressure, drive the ammonia turbine and can be converted to mechanical energy, export to generator with the mechanical energy merging that steam turbine produces with the pressure that ammonia is produced.

The present invention utilizes the classification of heat energy to reclaim, the high-quality heat energy that makes energy recovery return is realized high-quality direct utilization, low-quality heat energy and the tail gas that in the past diffused can promote by means of heat pump and utilize, thereby played the purpose that improves comprehensive utilization ratio, and, because the use of ammonia turbine, except that more howing than the generated energy of simple steam turbine, the use of ammonia turbine also has the generating of reduction fluctuation, improves the effect of power generating quality; And heat pump makes the turbine exhaust gas temperature, pressure reduce, and helps improving turbine efficiency.

As shown in Figure 1, it utilizes the structure and the schematic flow sheet of the specific embodiment that the afterheat of slags of recovery generates electricity for the present invention, the heat energy that is reclaimed by the slag treatment process is stored in the multistage thermal energy storage system by different temperature grade classifications, and this multistage thermal energy storage system can comprise high pressure drum 301, middle pressure thermal accumulator 302 and low pressure bag 303.In conjunction with aforementioned content as can be known, in the present embodiment, steam turbine and ammonia turbine can adopt existing multiple mode to realize driving the purpose that generator rotates generating with the power that merges, and repeat no more herein.

The heat energy that is reclaimed by the high-temperature gas mixture body in the slag treatment process is stored in high pressure drum 301, middle pressure thermal accumulator 302 and the low pressure bag 303 by different temperature grade classifications, and the high-quality energy recovery that the solid slag heat-exchange system reclaims in the slag treatment process is to high pressure drum 301; The heat energy of the high-temperature gas mixture body that produces in the slag treatment process passes through the steam heat-exchanging system recoveries, and the thermal energy storage of high temperature grade is used for generating in middle pressure thermal accumulator 302.

Press thermal accumulator 302 to steam turbine 501 delivering vapors in described, steam turbine 501 is converted into the dynamic power machine energy with heat energy, and drives generator 502 mechanical energy is converted into electric energy; This absorption heat pump adopts ammonia-water to make working medium, concentrated ammonia liquor mixed solution in the described heat pump under high pressure is heated to 100～120 ℃ through the driving heat source from high pressure drum 301, ammonia is evaporated in a large number form the saturated ammonia of high pressure, cross heat abstraction free liquid attitude molecule and enter ammonia turbine 511 through 120～150 ℃, the pressure that ammonia is produced can be converted to mechanical energy, exports to generator 502 with the mechanical energy merging that steam turbine 501 produces.

As shown in Figure 1, preferably, middle

thermal accumulator

302 and 501 of the steam turbine of pressing is provided with steam superheater 520 and pressure regulator valve 521, this steam superheater 520 is arranged at the top of the vapor recovery warehouse 104 of slag treatment, the saturated vapour of pressing thermal accumulator 302 to come out in described is crossed liquid saturation water in the heat abstraction steam through steam superheater 520, and through pressure regulator valve 521 to the metastable generating superheated vapor of steam turbine 501 discharge pressures.

In addition, described high pressure drum 301 is connected by a pressure regulator valve 304 with middle pressure thermal accumulator 302, tempus intercalare in no slag treatment, along with warm steam in the continuous consumption of generating, the middle thermal accumulator 302 interior temperature of pressing constantly descend, the high-temperature steam that is stored in high pressure drum 301 this moment is given middle pressure thermal accumulator 302 through this pressure regulator valve 304 with the thermal energy transfer in the high pressure drum 301, press thermal accumulator 302 temperature relatively stable in keeping, and the water that high pressure drum 301 is consumed also can be supplied with high pressure drum 301 through water pump 310 pressurizations again by the middle warm water of middle pressure thermal accumulator 302 after plate type heat exchanger 107 heating.

As shown in the figure, absorption heat pump comprises generator 512, adsorber 513, stram condenser 503 and heat exchanger 514, this generator 512 with the high-temperature steam of high pressure drum 301 as driving heat source, and the import of an ammonia superheater 516 is connected with this high pressure drum 301, its outlet end is connected to the steam-gas inlet of heat pump generator 512 by a pressure regulator valve 515 ', and the vapor outlet port of this generator 512 is pressed thermal accumulator 302 in being connected to; Present embodiment is pressed thermal accumulator 302 in the outlet end of described ammonia superheater 516 also is connected to by another pressure regulator valve 515 so that in ammonia superheater 516 overheated ammonias, be convenient to free adjusting overheated with the ratio that drives with heat.The front has been described and has been adopted overheated the use driving heat source of high pressure drum as ammonia, so that press thermal accumulator to be used for generating in can getting back to behind the overheated ammonia of high-temperature steam, but those skilled in the art can understand in conjunction with aforementioned content, can also regulate the pressure distribution of each heat-storing device in this case according to actual needs, and press thermal accumulator or low pressure bag to be used as the driving heat source of ammonia in optionally utilizing, give unnecessary details no longer one by one herein.

On the one hand, the circulating path of the steam-water in this power generation system is: press the high-temperature gas outlet of thermal accumulator 302 to be connected to steam turbine 501 by steam superheater 520, pressure regulator valve 521 in described, the tail gas of this steam turbine 501 (low-temperature saturated steam) outlet is sent into by pipeline and is formed cryogenic condensation water in the stram condenser 503, the condensation-water drain of this stram condenser 503 is connected to the cryogenic condensation water inlet end of steam heat-exchanging system, so that circulating water to be provided.

On the other hand, the ammonia of this power generation system-ammoniacal liquor circulating path is: the high-temperature gas outlet of high pressure drum 301 is connected to heat pump generator 512 as driving heat source by pressure regulator valve 515 '; The ammonia outlet of described generator 512 is delivered to ammonia turbine 511 via a throttle valve 517, and this ammonia pipeline is arranged at the ammonia superheater 516 of this generator outside through one simultaneously, so that ammonia is carried out Overheating Treatment; The low temperature ammonia outlet of ammonia turbine 511 is connected to adsorber 513, the low concentration ammonia water inlet of this adsorber 513 is connected to the low concentration ammonia water out of generator 512 by heat exchanger 514, the high strength ammonia water inlet that is connected to generator 512 after stram condenser 503 heats again through this heat exchanger 514 is delivered in the low temperature and high concentration ammoniacal liquor outlet of this adsorber 513 by a compression pump 518, realize the circulation of ammonia, the lifting utilization that has realized low-quality heat energy simultaneously, diffused tail gas.

Wherein the concentrated ammonia liquor mixed solution in this generator 512 under high pressure is heated to 100～120 ℃ through the driving heat source from high pressure drum 301, ammonia is evaporated in a large number form the saturated ammonia of high pressure, carry out 120～150 ℃ through ammonia superheater 516 and cross heat abstraction free liquid attitude molecule, and enter ammonia turbine 501 through throttle valve 517; The low concentration ammonia aqueous solution in the generator 512 after the ammonia evaporation is got back to adsorber 513 after heat exchanger 514 heat exchange; And the ammonia that leaves ammonia turbine 511 outlet forms high concentration ammoniacal liquor once more adsorber 513 in and from low concentration aqueous solution's blended absorbent of generator 512, high concentration ammoniacal liquor is by pump 518 pressurizations, make water vapor condensation through 60～80 ℃ of terminal steam heat-exchangings of stram condenser 503 and steam turbine 501 outlets, and the latent heat of condensation of absorption water vapour, after heat exchanger 514 and low density ammoniacal liquor heat exchange, enter generator 512 again, enter next the circulation thereby the low-quality heat energy that makes present embodiment can utilize this heat pump to absorb is converted into 100～120 ℃ higher quality heat energy from generator 512.

As can be seen from Figure, 60～80 ℃ of terminal low-temperature saturated steams of being discharged by steam turbine 501 outlets cool off through stram condenser 503, terminal steam cooling is condensed into 30～40 ℃ distilled water, and low temperature distillation water is made cooling medium and is injected third level vapor heat exchanger 203 by liquid pump 307 pressurizations, enters the circulation waterway of steam heat-exchanging system through third level heat exchanger 203 heated hot water; Finally can after pressurized, heated, supply be used for replenishing the steam water that generating consumes to middle pressure thermal accumulator.

Because steam turbine 501 terminal stram condensers 503 use, not only improved terminal negative pressure value, thereby improved steam turbine 501 heat energy-mechanical energy transformation efficiency, made the open end of original cooling tower change internal heat energy recovery loop into simultaneously, greatly reduced terminal heat-energy losses.And, at the intermittence of no slag treatment, the middle interior pressure of thermal accumulator of pressing can reduce with temperature, thereby have influence on the proper functioning of generator, if the intermittently long proper functioning that just possibly can't guarantee generator, and the use of ammonia turbine, can guarantee under middle pressure thermal accumulator 302 vapor pressures situation on the low side, to keep the generator proper functioning, and the heat dynamic resource of its use is the cheap generator tail gas that in the past was dropped, therefore, present embodiment is except that more howing than the generated energy of simple steam turbine, the use of ammonia turbine can also reduce the generating fluctuation, improve power generating quality, the influence that fluctuate to power generation system the intermittence in the time of further can also weakening no slag treatment.

By said structure as can be known, in the present embodiment, the working procedure of this afterheat generating system is as follows:

The saturated vapour that comes out by middle pressure thermal accumulator 302, cross liquid saturation water in the heat abstraction steam through steam superheater 520,, through steam turbine 501 heat energy is converted into power drive generator 502 and is converted into electric energy to the metastable generating steam of steam turbine 501 discharge pressures through pressure regulator valve 521; 60～80 ℃ of terminal low-temperature saturated steams that steam turbine 501 outlets are discharged are through stram condenser 503 coolings, with terminal steam cooling is 30～40 ℃ of condensed waters, cryogenic condensation water is made cooling medium and is given third level vapor heat exchanger 203 by water pump 307 pressurizations, and heated hot water enters circulation waterway behind third level vapor heat exchanger 203; Tempus intercalare in no slag treatment, along with generating constantly consumes a large amount of steam, the middle thermal accumulator 302 interior temperature of pressing constantly descend, the high-temperature steam that is stored in this moment in the high pressure drum 301 is given middle pressure thermal accumulator 302 through pressure regulator valve 304 with the thermal energy transfer in the high pressure drum 301, press the relatively stable of thermal accumulator 302 temperature in keeping, and the water that is consumed is pressurizeed through water pump 309 after press thermal accumulator 302 in supplying with after 202 heating of second level vapor heat exchanger by the low temperature water of low pressure bag 303; Supply with high pressure drum 301 by the middle warm water of middle pressure thermal accumulator 302 through water pump 310 pressurizations and after plate type heat exchanger 107 heating at the water that high pressure drum 301 is consumed; Absorption heat pump adopts ammonia-water to make working medium, ammoniacal liquor mixed solution in its generator 512 under high pressure is heated to 100～120 ℃ through the driving heat source from high pressure drum 301, make the ammonia that ammonia evaporates generation in a large number cross heat abstraction free liquid attitude molecule through 120～150 ℃, enter ammonia turbine 501 through throttle valve 517, the pressure that ammonia is produced can be converted to mechanical energy, and can export to generator 502 with the mechanical energy merging that steam turbine 501 produces; The low concentration ammonia aqueous solution after the evaporation is got back to adsorber 513 after heat exchanger 514 heat exchange; Heat absorption causes self temperature to drop to 0～10 ℃ because air pressure sharply descends to leave the ammonia of ammonia turbine 511 outlet, forms high concentration ammoniacal liquor once more adsorber 513 in and from low concentration aqueous solution's blended absorbent of generator 512; High concentration ammoniacal liquor is by pump 518 pressurizations, make water vapor condensation through stram condenser 503 and 60～80 ℃ of terminal steam heat-exchangings that steam turbine 501 exports, absorb the latent heat of condensation of water vapour, enter generator 512 again after heat exchanger 514 and the low density ammoniacal liquor heat exchange from generator 512, the higher quality heat energy that the low-quality heat energy that absorbs is converted into 100～120 ℃ enters next circulation.

This afterheat generating system has adopted heat pump techniques and steam turbine, ammonia turbine to unite to drive generation technology and has utilized the afterheat of slags of multistage recovery, storage, has realized high-quality heat energy (steam turbine) direct generation of electricity; The low-quality thermal power transfer of utilizing heat pump to absorb turbine exhaust gas is the high-quality energy that can be used for the ammonia generating, has solved traditional steam turbine cooling tower heat radiation problem that heat-energy losses is big, conversion efficiency of thermoelectric is low; Heat pump also makes the steam turbine terminal temperature lower, and negative pressure value is bigger, makes the steam turbine energy conversion efficiency higher; Low condensing water temperature and replenish new water and be used for flushing cinder water, dirt ash sparge water makes residual neat recovering system recycle gas temperature lower to the heat exchange of tail gas, the slag tapping temperature is lower, the system synthesis thermal loss has still less improved the heat-photoelectric transformation efficiency of whole afterheat generating system greatly.

Corresponding with above-mentioned afterheat generating system, the present invention also proposes a kind of method for power generation by waste heat, and the heat energy that is reclaimed by the slag treatment process is stored in the multistage thermal energy storage system by the classification of different temperatures grade; To the steam turbine delivering vapor, steam turbine is converted into the dynamic power machine energy with heat energy by described thermal energy storage system, and drives generator mechanical energy is converted into electric energy; The absorption heat pump that utilization is made working medium with ammonia-water is converted into higher quality heat energy with the low-quality heat energy that described steam turbine exports terminal steam, and provide the high temperature driven thermal source to this heat pump by this thermal energy storage system, the concentrated ammonia liquor mixed solution is under high pressure evaporated in a large number form the saturated ammonia of high pressure, drive the ammonia turbine pressure that ammonia produces can be converted to mechanical energy, and export to generator with the mechanical energy merging that steam turbine produces.In order to adapt to the needs of electricity-generating method of the present invention, in the heat recovery to slag treatment, the high-quality energy recovery that slag treatment process solid slag heat-exchange system is reclaimed is to the high pressure drum; The steam that produces in the slag treatment process is reclaimed by high, medium and low temperature steam classification heat exchanger system, and by vapor heat exchangers at different levels with middle pressure thermal accumulator and the low pressure bag of thermal energy storage to the corresponding temperature grade.

This electricity-generating method utilizes ammonia turbine and absorption heat pump auxiliary power generation, wherein this absorption heat pump adopts ammonia-water to make working medium, concentrated ammonia liquor mixed solution in the described heat pump under high pressure is heated to 100～120 ℃ through the driving heat source from the high pressure drum, ammonia is evaporated in a large number form the saturated ammonia of high pressure, cross heat abstraction free liquid attitude molecule and enter the ammonia turbine through 120～150 ℃, the pressure that ammonia is produced can be converted to mechanical energy, exports to generator with the mechanical energy merging that steam turbine produces; Simultaneously, described absorption heat pump is the high-quality heat energy that utilizes with the heat energy lifting of the terminal low-quality tail gas of steam turbine, has solved the problem of traditional steam turbine with cooling tower heat radiation thermal waste.

The saturated vapour of pressing thermal accumulator to come out in described is crossed liquid saturation water in the heat abstraction steam through steam superheater, and through pressure regulator valve to the metastable generating superheated vapor of steam turbine discharge pressure.

Described absorption heat pump comprises generator, adsorber, stram condenser and heat exchanger, wherein the concentrated ammonia liquor mixed solution in this generator under high pressure is heated to 100～120 ℃ through the driving heat source from the high pressure drum, ammonia is evaporated in a large number form the saturated ammonia of high pressure, cross heat abstraction free liquid attitude molecule through 120～150 ℃ in an ammonia superheater, and enter the ammonia turbine through throttle valve; The low concentration ammonia aqueous solution in the generator after the evaporation is got back to adsorber after the heat exchanger heat exchange; And the ammonia that leaves ammonia turbine outlet forms high concentration ammoniacal liquor once more with low concentration aqueous solution's blended absorbent from generator in adsorber, high concentration ammoniacal liquor is pressurizeed by water pump, make water vapor condensation through stram condenser and 60～80 ℃ of terminal steam heat-exchangings of steam turbine outlet, absorb the latent heat of condensation of water vapour, again through heat exchanger with enter generator from the low density ammoniacal liquor heat exchange of generator, the higher quality heat energy that the low-quality heat energy that absorbs is converted into 100～120 ℃ enters next circulation.

60～80 ℃ of terminal low-temperature saturated steams of being discharged by the steam turbine outlet cool off through stram condenser, terminal steam cooling is condensed into 30～40 ℃ distilled water, and low temperature distillation water is made cooling medium and is pressurizeed to third level vapor heat exchanger by water pump, enters circulation waterway through the heated hot water of third level heat exchanger; Be used for replenishing the steam water that generating consumes by liquid compression pump supply to middle pressure thermal accumulator again.

The import of described ammonia superheater is connected with the high pressure drum, and its outlet end is connected to the steam-gas inlet of heat pump generator by pressure regulator valve, and the vapor outlet port of this generator is pressed thermal accumulator in being connected to; The outlet end of described ammonia superheater is pressed thermal accumulator in being connected to by another pressure regulator valve simultaneously.

In one specific embodiment of method for power generation by waste heat of the present invention, described high pressure drum is connected by a pressure regulator valve with middle pressure thermal accumulator, tempus intercalare in no slag treatment, along with warm steam in the continuous consumption of generating, the middle interior temperature of thermal accumulator of pressing constantly descends, the high-temperature steam that is stored in the high pressure drum this moment is given middle pressure thermal accumulator through this pressure regulator valve with the thermal energy transfer in the high pressure drum, press the thermal accumulator temperature relatively stable in keeping, and the water that the high pressure drum is consumed is supplied with the high pressure drum by the middle warm water of middle pressure thermal accumulator through the water pump pressurization and after the plate type heat exchanger heating.

The present invention is according to the steam turbine power generation principle, utilizes the terminal cooling of alternative traditional cooling tower of heat pump, has reduced the steam turbine terminal temperature on the one hand, has improved steam turbine power generation efficient; Reclaiming terminal turbine exhaust gas waste heat simultaneously and promoting is that higher quality heat energy is utilizing, thereby having reduced heat energy diffuses, and has improved heat integration efficient; It is the heat pump of working medium that the present invention adopts as ammoniacal liquor, takes away the turbine exhaust gas waste heat by the heating of ammonia in condenser, promotes the saturated ammonia of high pressure-temperature that forms by heat pump and is generated electricity by the ammonia turbine, plays the purpose that improves conversion efficiency of thermoelectric.

As shown in Figure 2, it is the structure and the handling process schematic representation of the Application Example of afterheat generating system of the present invention and method.In this Application Example, the agent structure of afterheat generating system can repeat no more with reference to aforementioned content herein.Further, should be that this afterheat generating system is combined with semi-wet slag processing system and afterheat of slags reclaiming system with embodiment, specific as follows:

The semi-wet slag processing system comprises slag buffer memory storehouse, high-pressure aerial fog nozzle (or high-pressure water mist nozzle, below be that example describes with the high-pressure aerial fog nozzle) but the breaker and the solid slag transmission cooling unit of high speed rotating, top, described slag buffer memory storehouse has high-temperature liquid state slag inlet and high-temperature gas outlet, and described slag inlet is connected to the tap cinder mouth by fecal iron separator, slag guide pipe; Described high-pressure aerial fog nozzle and breaker are arranged at the below of slag inlet, the high-pressure aerial fog nozzle sprays to the breaker direction with high-pressure aerial fog, the mouth of slagging tap of described slag guide pipe vertically imports to slag the top of the breaker in slag buffer memory storehouse, described solid slag transmission cooling unit is positioned at the below of this breaker, be used to transmit this solid slag, and in the transmission course of this solid slag, further described solid slag cooled.

Preferable, this semi-wet slag processing system is to utilize air-water by a certain percentage to mix the high-pressure aerial fog cooling blast furnace liquid slag that forms, and utilizes breaker that slag is carried out mechanical crushing, is processed into the raw material that is used to make cement.

Semi-wet slag processing system of the present invention is applicable to the blast furnace ironmaking production process, and the liquid slag that high temperature is red-hot becomes to can be used for making the raw material of cement by the cooling cooling processing, and the heat? recovery that the slag cooling procedure is produced saves as available form.

Particularly, in conjunction with shown in Figure 1, semi-wet slag processing system 100 mainly comprises: liquid slag 101, fecal iron separator 102, slag guide pipe 103, slag buffer memory storehouse 104, high-pressure aerial fog nozzle 105, breaker 106 etc.

1400～1500 ℃ of red-hot liquid slags 101 that the tap cinder mouth flows out realize that through fecal iron separator 102 slag iron separates, and makes liquid slag import to slag buffer memory storehouse 104 by definite shape, distribution, direction through slag guide pipe 103 then earlier.In the present embodiment, the mouth of slagging tap of described slag guide pipe 103 is flat pattern and along the breaker axial distribution, slag is vertically imported slag buffer memory storehouse 104, because the breaker 106 of present embodiment comprises two broken wheels, therefore, this mouth of slagging tap can be along axially being distributed to slag on the breaker 106 of broken wheels, and high-pressure aerial fog nozzle 105 sprays to the breaker direction with high-pressure aerial fog.

As shown in Figure 1, the solid slag transmission cooling unit of present embodiment comprises plate type heat exchanger 107, auger heat exchange conveyer 108, fluid-bed heat exchanger 109, wherein, described plate type heat exchanger 107 is installed in the middle and lower part in described slag buffer memory storehouse 104, be positioned at the below of described breaker 106, the feed end of described auger heat exchange conveyer 108 is located at the bottom of this plate type heat exchanger 107, and its discharging termination is established this fluid-bed heat exchanger 109, the outer equipment of mucking haulage that is provided with of the outlet of fluid-bed heat exchanger 109.Solid slag after the fragmentation falls into 107 of plate type heat exchangers, and under the synergy of gravity and the 108 rotation transmission drives of bottom auger conveying heat exchanger, constantly move down, and in folding process by lowering the temperature with the contact heat-exchanging of plate type heat exchanger 107 and heat being passed to circulating water in the plate type heat exchanger 107, the gas converting heat between the slag charge slit also and around the plate type heat exchanger simultaneously; Described auger heat exchange conveyer 108, fluid-bed heat exchanger 109 then utilize the Cryogenic air that feeds to carry out the heat exchange cooling in the other direction.Because the concrete structure and the set-up mode of this plate type heat exchanger 107, auger heat exchange conveyer 108 and fluid-bed heat exchanger 109 can be implemented with reference to prior art, therefore, repeat no more herein.

The high-temperature gas outlet top at these 104 tops, slag buffer memory storehouse is provided with dirt ash flooding nozzle 114, is used to clear up the floating ash on the superheater; The bottom in this slag buffer memory storehouse 104 is a comb hydrophone 111, and the water outlet of this comb hydrophone 111 can lead to the precipitating type water reservoir by pipeline, and the water of water reservoir 112 can be recycled through behind the sedimentation and filtration, supplies water for high-pressure aerial fog nozzle 105 and dirt ash sparge water pipeline 113.

In this semi-wet slag processing system, high-temperature liquid state slag 101 realizes that by fecal iron separator 102 the slag iron of slag separates; Slag guide pipe 103 imports to slag buffer memory storehouse 104 (can simultaneously as vapor recovery warehouse) with liquid slag 1 according to definite shape, distribution, direction; High-pressure aerial fog nozzle 105 points to the breaker direction with high pressure water, impacts liquid slag 101 and makes its preliminary fragmentation, cooling be cooled to half curdled appearance; The commutation breaker of high speed rotating is further broken to the semisolid slag that falls, water spraying structure on the breaker further is cooled to its cooling and satisfies follow-up air-cooled required condition simultaneously, comprise uniform grain sizes, NA temperature, gas permeability and bulk cargo flowability preferably, in the specific embodiment of the present invention, described slag is cooled to 600～700 ℃ of granularity 1～8mm, temperature by the water spraying structure fragmentation on the described breaker, cooling; This solid granulates is further lowered the temperature through plate type heat exchanger 107, conveying auger heat exchanger 108, fluid-bed heat exchanger 109 and is cooled to 50～80 ℃ or following, transfers to cement processing factory by drag-out slag car 110 again.

As shown in Figure 2, in this concrete Application Example of the present invention, the steam heat-exchanging system can be high, medium and low temperature classification heat-exchange system, it comprises three grades of vapor heat exchangers of series connection: first order vapor heat exchanger 201, second level vapor heat exchanger 202 and third level vapor heat exchanger 203, and heat exchangers at different levels are made up of two loops: the outside provides the medium (the high-temperature gas mixture body that slag handling system produces) of heat energy to form first loop; Inside is used for utilizing the medium (present embodiment is adopted and used water as this medium) that reclaims heat energy to form second loop.As shown in the figure, in described three grades of vapor heat exchangers, each vapor heat exchanger includes housing and is arranged at the interior heat exchanging tube of this housing, during being connected to, the heat exchanging tube temperature end outlet of first order vapor heat exchanger 201 presses thermal accumulator 302, the temperature end outlet of second level vapor heat exchanger 202 is connected to low pressure bag 303, third level vapor heat exchanger 203 comprises two groups of heat exchanging tubes, wherein one group of heat exchanging tube of diagram top be since the distilled water that gets off of self power generation steam turbine condensation make the water source, its temperature end outlet can directly insert the circulation waterway of heat exchanger; Another group heat exchanging tube of third level vapor heat exchanger 203 belows is used for replenishing new cold water, and its temperature end outlet is connected to oxygen-eliminating device 306 earlier and inserts low pressure bag 303 again, enters the circulation waterway of vapor heat exchangers at different levels.

The high-temperature gas mixture body that produces in the described slag handling system 100 enters vapor heat exchangers 201,202,203 at different levels from the vapor recovery warehouse on 104 tops, slag buffer memory storehouse through the steam conveying pipe order, and carry out exchange heat with corresponding heat exchanging tubes at different levels, make medium (mixed gas) temperature in first loop of each vapor heat exchanger reduce, medium in second loop (water of heat exchanging tube inside) temperature raises, then, the thermal energy storage that will be reclaimed by the temperature end outlet of the heat exchanging tube of vapor heat exchangers at different levels is to the heat-storing device (vide infra) of corresponding temperature grade.

Multistage thermal energy storage system comprises high pressure drum 301, middle pressure thermal accumulator 302 and 303 3 grades of heat-storing devices of low pressure bag, and in aforementioned each heat-storing device, and the high pressure drum can press the temperature in the thermal accumulator more stable relatively to middle pressure thermal accumulator supply institute calorific requirement in making; Simultaneously, the heat-storing device of low relatively one-level by other heat-exchanger rig of high one-level to other heat-storing device make-up water of high one-level.Among Fig. 2, high pressure drum 301 is pressed thermal accumulator 302 in being connected to by pressure regulator valve 304; At the intermittence of no slag treatment, along with generating consumes a large amount of steam, the middle thermal accumulator 302 interior temperature of pressing constantly descend, the high-temperature steam that is stored in high pressure drum 301 this moment can be given middle pressure thermal accumulator 302 with the thermal energy transfer in the high pressure drum 301 through pressure regulator valve 304, to press the temperature in the thermal accumulator 302 in stable; When the water that consumes when high pressure drum 301 reached certain critical value, the middle warm water of middle pressure thermal accumulator 301 mixed and supply high pressure drum 301 after plate type heat exchanger 107 heats through liquid jetting device 310 with the liquid water of the bottom of high pressure drum 301 through liquid pump 312 pressurization backs; Cryogenic condensation water is given third level vapor heat exchanger 203 by liquid pump 307 pressurizations, and by mixing via liquid jetting device 308 with the liquid water of low pressure bag 303 bottoms after 203 heating of third level vapor heat exchanger and after 202 heating of second level vapor heat exchanger, resupplying low pressure bag 303, enter the circulating water line of heat exchanger, simultaneously, the liquid water that low pressure bag 303 temperature of lower are lower can resupply middle pressure thermal accumulator 302 by the liquid water of liquid pump 311 pressurization backs and middle pressure thermal accumulator 302 bottoms after liquid jetting device 309 is mixed into 201 heating of first order vapor heat exchanger, to replenish the steam water that generating consumes; In addition, the middle thermal accumulator 302 of pressing is connected to low pressure bag 303 by pressure regulator valve 305, oxygen-eliminating device 306, the cold soft water of new benefit injects low pressure bag 303 through third level vapor heat exchanger 203 heat exchange and after oxygen-eliminating device 306 deoxygenations, makes low pressure bag 303 harvest heat, new water supply, deoxygenation function in one.

Wherein, first entrance point of liquid jetting device 308, second entrance point are connected to the temperature end outlet and the low pressure bag bottom water outlet of the top condensed water heat exchanging tube of third level vapor heat exchanger 203 respectively, and its outlet end connects the heat exchanging tube low-temperature end inlet of second level vapor heat exchanger 202; And first entrance point of liquid jetting device 309, second entrance point are connected to low pressure bag 303 bottom water outlets and middle bottom water outlet of pressing thermal accumulator 302 respectively, and its outlet end connects the heat exchanging tube low-temperature end inlet of first order vapor heat exchanger 201; Press the bottom water outlet of thermal accumulator 302 bottom water outlets and high pressure drum 301 during first entrance point of liquid jetting device 310, second entrance point are connected to respectively, its outlet end connects the heat exchanging tube low-temperature end inlet of plate type heat exchanger 107, specifically sees also accompanying drawing.

On the other hand, described solid slag heat-exchange system is in the transmission course of solid slag described solid slag to be carried out the heat exchange cooling.In the present embodiment, this solid slag heat-exchange system comprises plate type heat exchanger 107 and the air heat-exchange system that forms based on aforementioned solid slag transmission cooling unit.The high temperature furnace slag in slag buffer memory storehouse 104 at first carries out the contact-type heat exchange with plate type heat exchanger 107, the heat energy of solid slag cooling heat transferring is converted into high temperature heat by plate type heat exchanger 107 is stored into high pressure drum 301 as the high-temperature heat-storage device.In conjunction with described slag handling system as can be known, in this specific embodiment of the present invention, described solid slag heat-exchange system also is included in the air heat-exchange system that forms in this slag buffer memory storehouse and the described solid slag transmission cooling unit, and is specific as follows:

In the embodiments of the invention, be provided with circulating fan 205 between the tail gas outlet of the afterbody vapor heat exchanger (present embodiment is a third level vapor heat exchanger 203) of described steam heat-exchanging system and the intake grill of described fluid-bed heat exchanger 109, between described steam heat-exchanging system and solid slag heat-exchange system, form the gas circulation path, adopt circulating fan 205 to provide circulating air as cooling medium and slag buffer memory storehouse 104 (containing the slag in plate type heat exchanger 107 gaps), auger heat exchange conveyer 108, slag in the fluid-bed heat exchanger 109 carries out heat exchange, and heated air and water vapor enter the steam heat-exchanging system after mixing.Reclaim overpressure in the path for fear of steam heat-exchanging, can be provided with certain pressure fan 204 at the upstream side of circulating fan 205, concrete set-up mode can repeat no more with reference to prior art herein.

The high-temperature gas mixture body that produces in the slag treatment process is subjected to circulating fan 205 draft effects, press thermal accumulator 302 (middle pressure drum) to store in high temperature heat being passed to when the first order vapor heat exchanger 201 by the vapor recovery warehouse at 104 tops, slag buffer memory storehouse with 200～250 ℃ of high temperature heat forms, heat energy is passed to low pressure bag 303 and store through second level vapor heat exchanger 202 again from first order vapor heat exchanger 201 tail gas discharged with 90～120 ℃ of low temperature heat energy forms, heat energy is passed to 90～120 ℃ water of low pressure bag 303 in from second level vapor heat exchanger 202 tail gas discharged steam through third level vapor heat exchanger 203 and mixed, also store with the low temperature heat energy form with it.

In order to make the temperature that enters the circulating air in the fluid-bed heat exchanger 109 lower, thereby make the slag temperature of output lower, in the present embodiment, 109 of described circulating fan 205 and fluid-bed heat exchangers also are provided with tail gas heat exchanger 206, the low temperature water intake of the heat exchanging tube of this tail gas heat exchanger 206 is connected to precipitating type water reservoir 112 through a filter 207, will provide through the water after the heating to dirt ash flushing pipe.The high-temperature gas mixture body after aforementioned three grades of heat exchange, can make exhaust temperature reach≤50 ℃, again by circulating fan pressurization,, heat energy is passed to flushing cinder water and dirt ash wash water further with tail gas heat exchanger 206 heat exchange; Low temperature exhaust gas is re-used as cooling medium in fluid-bed heat exchanger and slag heat exchange, can make the slag tapping temperature drop to minimum (50～80 ℃), and be fluidized a heat exchanger 109 warmed-up tail gas again when auger heat exchange conveyer 108, plate type heat exchanger 107 and solid-state slag heat exchange, and the high-temperature gas mixture (being called for short the high-temperature gas mixture body) that heats up and be converted into steam and air, enter next circulation through slag buffer memory storehouse 104.

In conjunction with aforementioned slag handling system as can be known, the working principle of this residual neat recovering system of the present invention is as follows:

1400～1500 ℃ of red-hot liquid slags of high temperature import to vapor recovery warehouse according to definite shape, direction behind guide pipe; Make its cooling, preliminary heat exchange be cooled to 900～1100 ℃ with high-pressure aerial fog (present embodiment the is vaporific gas-water mixture) spray of pointing to breaker towards liquid slag; The heat exchange of further spraying water is cooled to 600～700 ℃ to the slag shattering process by the commutation breaker of a pair of high speed rotating again; Lower the temperature at high temperature furnace slag, solidify, in the cooling heat transferring process, the water in the high-pressure aerial fog is evaporated vaporization and forms 300～400 ℃ of high-temperature gas mixture bodies with air in the pipeline; The high-temperature gas mixture body is subjected to circulating fan draft effect, presses thermal accumulator in high temperature heat being passed to when the first order vapor heat exchanger by vapor recovery warehouse, and stores with 200～250 ℃ of high temperature heat forms; The tail gas that goes out first order vapor heat exchanger is passed to the low pressure bag through second level vapor heat exchanger with heat energy, and stores with 90～120 ℃ of low temperature heat energy forms; The tail gas steam that goes out second level vapor heat exchanger is passed to the low pressure bag through third level vapor heat exchanger with heat energy, and mixes with 90～120 ℃ of water, also stores with the low temperature heat energy form; Tail gas pressurizes through circulating fan, further makes exhaust temperature reach minimum with the tail gas heat exchanger heat exchange, simultaneously with waste heat heating flushing cinder water that absorbs and heat exchanger dirt ash wash water; Tail gas be re-used as cooling medium further in fluid-bed heat exchanger with solid-state slag heat exchange, tail gas is heated once more, it is minimum that the slag tapping temperature is dropped to; Be fluidized the warmed-up gas of a heat exchanger, when conveying auger heat exchanger, plate type heat exchanger and solid slag heat exchange and heat up and to be converted into 300～400 ℃ of high temperature airs, enter vapor recovery warehouse and water vapour and be mixed into next the circulation again; 600～700 ℃ high-temp solid slag is given WATER AS FLOW MEDIUM in the plate type heat exchanger by heat exchange with thermal energy transfer between plate type heat exchanger, slag heat energy is converted into high temperature heat by plate type heat exchanger is stored into the high pressure drum with 300～400 ℃ of high temperature saturation water forms, in addition, also can carry out heat exchange during circulating air process plate type heat exchanger, further the Heating Cyclic air with high-temp solid slag therebetween; The condensed water that water vapor in the high-temperature gas mixture body forms through three grades of heat exchanger condensations of steam and wash the sewage that gets off by dirt ash sparge water enters the water reservoir precipitation through the dedusting reflux line, enters the next round circulation after filtering through filter.

Because this afterheat of slags reclaiming system has adopted high, medium and low temperature classification heat exchanger system that the classification in high, medium and low temperature heat accumulation bag of corresponding different quality heat energy is stored, press the high-quality heat energy of thermal accumulator can directly offer gas-turbine in making and be used for generating; The high pressure drum cooperates with middle pressure thermal accumulator, heat when making no slag treatment can be by the high pressure drum to the supply of middle pressure thermal accumulator, press thermal accumulator to realize that middle Hair Fixer electricity and accumulation of heat are in one in making, guarantee the more stable relatively of middle pressure thermal accumulator temperature, cooperated the use of steam turbine pressure regulator valve to make steam turbine work more stable; Being used of low pressure bag, oxygen-eliminating device makes the low pressure bag harvest heat, new water supply deoxygenation in one; Make that system unit is with better function, structure is simpler.

Should can be with reference to the description of aforementioned specific embodiment with embodiment's afterheat generating system and method.The heat energy that is reclaimed by the high-temperature gas mixture body in the slag treatment process is stored in the described multistage thermal energy storage system by different temperature grade classifications, this power generation system is to utilize the heat energy that classification stores in the multistage thermal energy storage system to generate electricity, this power generation system comprises generator, steam turbine, ammonia turbine and absorption heat pump, described multistage thermal energy storage system is to the steam turbine delivering vapor, steam turbine is converted into the dynamic power machine energy with heat energy, and the drive generator is converted into electric energy with mechanical energy; This absorption heat pump adopts ammonia-water to make working medium, the low-quality heat energy that described steam turbine is exported terminal steam is converted into higher quality heat energy, and provide high-quality driving heat source for described heat pump by described thermal energy storage system, the concentrated ammonia liquor mixed solution is under high pressure evaporated in a large number form the saturated ammonia of high pressure, drive the ammonia turbine and can be converted to mechanical energy, export to generator with the mechanical energy merging that steam turbine produces with the pressure that ammonia is produced.

As shown in Figure 2, preferably, middle

thermal accumulator

302 and 501 of the steam turbine of pressing is provided with steam superheater 520 and pressure regulator valve 521, this steam superheater 520 is arranged at the top of the vapor recovery warehouse 104 of slag treatment, the saturated vapour of pressing thermal accumulator 302 to come out in described is crossed liquid saturation water in the heat abstraction steam through steam superheater 520, and through pressure regulator valve 521 to the metastable generating superheated vapor of steam turbine discharge pressure.

In addition, described high pressure drum 301 is connected by a pressure regulator valve 304 with middle pressure thermal accumulator 302, tempus intercalare in no slag treatment, along with warm steam in the continuous consumption of generating, the middle thermal accumulator 302 interior temperature of pressing constantly descend, the high-temperature steam that is stored in high pressure drum 301 this moment is given middle pressure thermal accumulator 302 through this pressure regulator valve 304 with the thermal energy transfer in the high pressure drum 301, press thermal accumulator 302 temperature relatively stable in keeping, and the water that high pressure drum 301 is consumed also can add heat supply high pressure drum 301 through plate type heat exchanger 107 again by the middle warm water of middle pressure thermal accumulator 302 after liquid pump 310 pressurizations.

As shown in the figure, absorption heat pump comprises generator 512, adsorber 513, stram condenser 503 and heat exchanger 514, this generator 512 with the high-temperature steam of high pressure drum 301 as driving heat source, and the import of an ammonia superheater 516 is connected with this high pressure drum 301, its outlet end is connected to the steam-gas inlet of heat pump generator 512 by a pressure regulator valve 515 ', and the vapor outlet port of this generator 512 is pressed thermal accumulator 302 in being connected to; Present embodiment is pressed thermal accumulator 302 in the outlet end of described ammonia superheater 516 also is connected to by another pressure regulator valve 515 so that in ammonia superheater 516 overheated ammonias, be convenient to free adjusting overheated with the ratio that drives with heat.

Though the present invention discloses with specific embodiment; but it is not in order to limit the present invention; any those skilled in the art; the displacement of the equivalent assemblies of under the prerequisite that does not break away from design of the present invention and scope, having done; or, all should still belong to the category that this patent is contained according to equivalent variations and modification that scope of patent protection of the present invention is done.And need to prove, each constituent element of the present invention and various method steps are not limited in above-mentioned overall applicability, but can combine with other prior art according to actual needs, therefore, other combination relevant with this case inventive point and concrete the application have been contained in the present invention in the nature of things.

Claims

1. afterheat generating system, it is characterized in that, this power generation system is to utilize the heat energy that stores in the thermal energy storage system to generate electricity, this power generation system comprises generator, steam turbine, ammonia turbine and absorption heat pump, described multistage thermal energy storage system is to the steam turbine delivering vapor, steam turbine is converted into the dynamic power machine energy with heat energy, and the drive generator is converted into electric energy with mechanical energy; This absorption heat pump adopts ammonia-water to make working medium, the low-quality heat energy that described steam turbine is exported terminal steam is converted into higher quality heat energy, and provide high-quality driving heat source for described heat pump by described thermal energy storage system, the concentrated ammonia liquor mixed solution is under high pressure evaporated in a large number form the saturated ammonia of high pressure, drive the ammonia turbine and can be converted to mechanical energy, export to generator with the mechanical energy merging that steam turbine produces with the pressure that ammonia is produced.

2. afterheat generating system as claimed in claim 1 is characterized in that, this thermal energy storage system comprises high pressure drum and the middle thermal accumulator of pressing at least, and the described middle thermal accumulator of pressing is to the steam turbine delivering vapor; Described high pressure drum provides the driving heat source of heating concentrated ammonia liquor mixed solution.

3. afterheat generating system as claimed in claim 2, it is characterized in that, described absorption heat pump comprises generator, adsorber, stram condenser and heat exchanger, wherein the concentrated ammonia liquor mixed solution in this generator is under high pressure through the driving heat source heating from the high pressure drum, ammonia is evaporated in a large number form the saturated ammonia of high pressure, cross heat abstraction free liquid attitude molecule through an ammonia superheater, and enter the ammonia turbine through throttle valve; The low concentration ammonia aqueous solution in the generator after the evaporation is got back to adsorber after the heat exchanger heat exchange; And the ammonia that leaves ammonia turbine outlet forms high concentration ammoniacal liquor once more with low concentration aqueous solution's blended absorbent from generator in adsorber, high concentration ammoniacal liquor is pressurizeed by pump, export terminal steam heat-exchanging through stram condenser and steam turbine and make water vapor condensation, absorb the latent heat of condensation of water vapour, again through heat exchanger with enter generator from the low density ammoniacal liquor heat exchange of generator, the low-quality heat energy that absorbs is converted into higher quality heat energy enters next circulation.

4. afterheat generating system as claimed in claim 2, it is characterized in that, press between thermal accumulator and steam turbine in described and be provided with the steam superheater and first pressure regulator valve, the saturated vapour of pressing thermal accumulator to come out in described is crossed liquid saturation water in the heat abstraction steam through steam superheater, and through this first pressure regulator valve to the metastable generating superheated vapor of steam turbine discharge pressure.

5. afterheat generating system as claimed in claim 3, it is characterized in that, the import of described ammonia superheater is connected with the high pressure drum, and its outlet end is connected to the steam-gas inlet of heat pump generator by second pressure regulator valve, and the vapor outlet port of this generator is pressed thermal accumulator in being connected to; The outlet end of described ammonia superheater is pressed thermal accumulator in being connected to by the 3rd pressure regulator valve simultaneously.

6. afterheat generating system as claimed in claim 2, it is characterized in that, described high pressure drum is connected by the 4th pressure regulator valve with middle pressure thermal accumulator, the high-temperature steam that is stored in the high pressure drum can be given middle pressure thermal accumulator with the thermal energy transfer in the high pressure drum through the 4th pressure regulator valve, press the thermal accumulator temperature relatively stable in keeping, and the water that the high pressure drum is consumed is supplied with the high pressure drum by the middle warm water of middle pressure thermal accumulator through the water pump pressurization and after the vapor heat exchanger heating.

7. afterheat generating system as claimed in claim 2 is characterized in that, the heat energy of the recovery in the slag treatment process is stored in the described thermal energy storage system by different temperature grade classifications; Described multistage thermal energy storage system also comprises the low pressure bag; The high-quality thermal energy storage that the solid slag heat-exchange system reclaims in the slag treatment process is to the high pressure drum; The steam that produces in the slag treatment process reclaims by high, medium and low temperature vapor heat exchanger, and by vapor heat exchangers at different levels with middle pressure thermal accumulator and the low pressure bag of thermal energy storage to the corresponding temperature grade.

8. afterheat generating system as claimed in claim 7, it is characterized in that, the terminal low-temperature saturated steam of being discharged by the steam turbine outlet cools off through stram condenser, terminal steam cooling is condensed into the lower distilled water of temperature, and low temperature distillation water is made cooling medium and is pressurizeed to the Low Temperature Steam heat exchanger by water pump, enters circulation waterway through the heated hot water of Low Temperature Steam heat exchanger.

9. method for power generation by waste heat, the thermal energy storage system is to the steam turbine delivering vapor, and steam turbine is converted into the dynamic power machine energy with heat energy, and drives generator mechanical energy is converted into electric energy; It is characterized in that, working medium is made in this method for power generation by waste heat utilization with ammonia-water absorption heat pump is converted into higher quality heat energy with the low-quality heat energy that described steam turbine exports terminal steam, and provide the high temperature driven thermal source to this heat pump by this thermal energy storage system, the concentrated ammonia liquor mixed solution is under high pressure evaporated in a large number form the saturated ammonia of high pressure, drive the ammonia turbine pressure that ammonia produces can be converted to mechanical energy, and export to generator with the mechanical energy merging that steam turbine produces.

10. method for power generation by waste heat as claimed in claim 9, it is characterized in that, this thermal energy storage system comprises high pressure drum and the middle thermal accumulator of pressing at least, cross liquid saturation water in the heat abstraction steam by the saturated vapour of pressing thermal accumulator to come out in described through steam superheater, and through pressure regulator valve to the metastable generating superheated vapor of steam turbine discharge pressure; The driving heat source of heating concentrated ammonia liquor mixed solution is provided and ammonia is carried out Overheating Treatment by described high pressure drum.

11. method for power generation by waste heat as claimed in claim 10, it is characterized in that, described absorption heat pump comprises generator, adsorber, stram condenser and heat exchanger, wherein the concentrated ammonia liquor mixed solution in this generator is under high pressure through the driving heat source heating from the high pressure drum, ammonia is evaporated in a large number form the saturated ammonia of high pressure, overheated through the ammonia superheater after throttle valve enters the ammonia turbine; The low concentration ammonia aqueous solution in the generator after the evaporation is got back to adsorber after the heat exchanger heat exchange; And the ammonia that leaves ammonia turbine outlet forms high concentration ammoniacal liquor once more with low concentration aqueous solution's blended absorbent from generator in adsorber, high concentration ammoniacal liquor is pressurizeed by water pump, export terminal steam heat-exchanging through stram condenser and steam turbine and make water vapor condensation, absorb the latent heat of condensation of water vapour, again through heat exchanger with enter generator from the low density ammoniacal liquor heat exchange of generator, the low-quality heat energy that absorbs is converted into higher quality heat energy enters next circulation.

12. method for power generation by waste heat as claimed in claim 11, it is characterized in that, the import of described ammonia superheater is connected with the high pressure drum, and its outlet end is connected to the steam-gas inlet of heat pump generator by pressure regulator valve, and the vapor outlet port of this generator is pressed thermal accumulator in being connected to; The outlet end of described ammonia superheater is pressed thermal accumulator in being connected to by another pressure regulator valve simultaneously.

13. method for power generation by waste heat as claimed in claim 10, it is characterized in that, described high pressure drum is connected by a pressure regulator valve with middle pressure thermal accumulator, tempus intercalare in no slag treatment, along with warm steam in the continuous consumption of generating, the middle interior temperature of thermal accumulator of pressing constantly descends, the high-temperature steam that is stored in the high pressure drum this moment is given middle pressure thermal accumulator through this pressure regulator valve with the thermal energy transfer in the high pressure drum, press the thermal accumulator temperature relatively stable in keeping, and the water that the high pressure drum is consumed is supplied with the high pressure drum by the middle warm water of middle pressure thermal accumulator through the water pump pressurization and after the plate type heat exchanger heating.

14. method for power generation by waste heat as claimed in claim 11 is characterized in that, described thermal energy storage system also comprises the low pressure bag; The heat energy of the recovery in the slag treatment process is stored in the described thermal energy storage system by different temperature grade classifications: the high-quality thermal energy storage that will be reclaimed by the high-temp solid slag charge heat exchange that the slag treatment process forms is to the high pressure drum, the heat energy of the high-temperature gas mixture body that produces in the slag treatment process high, medium and low temperature multistage steam heat exchanger by the steam heat-exchanging system is reclaimed, and by vapor heat exchangers at different levels with middle pressure thermal accumulator and the low pressure bag of thermal energy storage to the corresponding temperature grade.

15. method for power generation by waste heat as claimed in claim 14, it is characterized in that, 60～80 ℃ of terminal low-temperature saturated steams of being discharged by the steam turbine outlet cool off through stram condenser, terminal steam cooling is condensed into 30～40 ℃ distilled water, and low temperature distillation water is made cooling medium and is pressurizeed to the Low Temperature Steam heat exchanger by water pump, enters the circulation waterway of steam heat-exchanging system through the heated hot water of Low Temperature Steam heat exchanger.