CN103089441A - Distributed pneumatic-Rankine combined cycle combined cooling heating and power device - Google Patents
Distributed pneumatic-Rankine combined cycle combined cooling heating and power device Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 48
- 238000001816 cooling Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000010521 absorption reaction Methods 0.000 claims abstract description 28
- 230000005611 electricity Effects 0.000 claims abstract description 16
- 239000000446 fuel Substances 0.000 claims abstract description 15
- 239000003517 fume Substances 0.000 claims abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 25
- 239000003546 flue gas Substances 0.000 claims description 24
- 239000008400 supply water Substances 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 16
- 239000006200 vaporizer Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 14
- 239000012153 distilled water Substances 0.000 claims description 11
- 229920006395 saturated elastomer Polymers 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 230000020169 heat generation Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 12
- 238000005260 corrosion Methods 0.000 abstract description 12
- 238000005057 refrigeration Methods 0.000 abstract description 12
- 239000002253 acid Substances 0.000 abstract description 6
- 238000011282 treatment Methods 0.000 abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000001301 oxygen Substances 0.000 abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000003518 caustics Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 4
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- 239000002028 Biomass Substances 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- -1 condenser Substances 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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- 239000002912 waste gas Substances 0.000 description 1
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention relates to a distributed pneumatic-Rankine combined cycle combined cooling heating and power device. The distributed pneumatic-Rankine combined cycle combined cooling heating and power device is characterized in that the exhaust of a pneumatic machine is adopted as a heat source of a Rankine cycle waste heat boiler, a steam Rankine cycle system adopts a positive pressure and close type operating mode, a condenser of outlet dead steam of a steam turbine is utilized as a heat source of a heating system and an absorption refrigeration machine, and the cascading use of an energy source is realized; and high grade energy of a recycled fuel is used for generating electricity, evaporative capacity (or the heating load of 0.7 MW) of per ton can recover electric quantity which is more than 340 degrees, meanwhile, the cooling heating combination is realized, and the waste heat of fume is recovered in a high efficiency manner. A water treatment system of the steam Rankine cycle system causes no or only a little of waste acid and waste caustic to generate, and an oxygen corrosion and scaling problem of the boiler is effectively avoided. Therefore, energy conservation, environmental friendliness and social benefits are very notable.
Description
Technical field
The present invention relates to a kind of distributed pneumatic-Rankine combined cycle cold, heat and electricity triple supply device, specifically belong to the energy-conserving and environment-protective technical field.
Background technique
Industrial boiler is widely used in the every field of social production and people's lives as a kind of special equipment of pressure-bearing.The energy of developed country and new developing country's industrial boiler consumption accounts for 25%～45% left and right of the total power consumption in various countries usually, and the waste gas that the temperature of its discharging is higher is also the environmental pollution that causes and the arch-criminal of greenhouse effect.
For a long time, because the industrial boiler structure is relatively simple, make relatively easily, without examining, of common occurrence not according to the phenomenon of energy-saving safe technical specification manufacturing installation and use, energy-conservation and emission reduction effect makes people worried.According to statistics, the whole nation with the industrial boiler recoverable amount is being approximately 530,000,1,250,000 MW, and near 2 times of the station boiler electric motor power, energy consumption reaches 4.2 hundred million tons of standard coals, accounts for 27.8% of national primary energy total quantity consumed.Take efficiency as example, the average BTHE of China's coal-burned industrial boiler is only 65%, hangs down 10～20 percentage points than foreign level, every year on average 6000 ten thousand tons of left and right of many consumption coals.Take energy for building as example, China's builder area energy consumption and world level have larger gap, according to the investigation of national central heating boiler net to the Northern Residential Buildings heating energy consumption, Beijing, Tianjin and every square metre of heating energy consumption average out to 24.2kg standard coal of one of the Northeast Heating Season, and the average 6.2kg standard coal only of weather conditions close Germany, China unit's heating energy consumption is 3.9 times of Germany.Therefore industrial boiler become China carry out energy-saving and cost-reducing, improve efficiency, reduce the main object that pollutes.
Distributed energy resource system be directly in the face of the user, the middle-size and small-size multifunctional energy conversion using system of various form of energy energy is provided by user's request.It is different from centralized production of energy and the supplying mode of traditional " large unit, high-power station, large electrical network ", but be dispersed in user side, reach more high-energy source utilization ratio, more lower energy cost, higher function Security and better multi-functional targets such as environmental-protecting performance with Integrated Energy cascade utilization pattern.Wherein cooling heating and power generation system is main direction and the principal mode of distributed energy development, it is also one of most active system, it is one of focus of developed country's emphasis research and development and application, European Union member countries take the different modes such as tax revenue, subsidy to facilitate energetically the supply of cooling, heating and electrical powers project implementation one after another, and for example Italy encourages building to use cooling heating and power generation system with the way of deduction and exemption 20% to 40% fuel cost.Classify by the power subsystem types, mainly contain the cold, heat and electricity three-ways such as gas turbine-absorption refrigeration, internal-combustion engine-absorption refrigeration, steam turbine-absorption refrigeration, Stirling-electric hybrid-absorption refrigeration, fuel cell-absorption refrigeration and produce system.
For traditional heating system, although boiler converts 60% to 90% of fuel combustion heat to useful heat energy (steam or hot water) and offers the user, but the high-temperature flue gas that burning produces originally can be as generating (product merit), directly be used as heating steam or the hot water of lower temperature, the acting capacity loss is very large; Aspect refrigeration, the peak electric load that power plant brings in order to satisfy summer air-conditioning enlarges electrical production, and the excessive waste heat that produces can't utilize, and causes the significant wastage of the energy; Independent absorption refrigeration, or cold far away due to the distance thermal source can't be grown the distance conveying again, be restricted and make to use, even if Gas Direct-fired type absorption system also to a certain degree exists the high-order heat of similar boiler to be used for the acting capacity loss of low temperature purpose, in addition, first pollute the basic reason that the using energy source pattern of administering afterwards causes energy and environment to be difficult to coordinate especially.
For traditional cold, heat and power triple supply system, undoubtedly have huge vitality and wide development space, but also have certain problem: the cold, heat and electricity three-ways such as gas turbine-absorption refrigeration, internal-combustion engine-absorption refrigeration, Stirling-electric hybrid-absorption refrigeration, fuel cell-absorption refrigeration produce system, adopt when moving with steam Rankine combined cycle mode, need supporting one-level chemical deionization water system, and the operating cost of Water Treatment is very high, and produce certain waste water, spent acid, salkali waste pollution, must administer.
Therefore how to keep cold, heat and power triple supply system advantage, develop the wider cold, heat and power triple supply system of fuel tolerance, the real shortcoming that solves the low-grade utilization of industrial boiler high-grade fuel, break through traditional thinking and realize that the cold, heat and electricity three-way of environmental protection produces, and becomes the difficult point of this area research.
Summary of the invention
Purpose of the present invention is for solving the problem that exists in above-mentioned industrial boiler and traditional cold thermoelectricity three jointly-supplying technologies, propose a kind of distributed pneumatic-Rankine combined cycle cold, heat and electricity triple supply device, by pneumatic circulating, malleation steam Rankine association circulating power generation system, the high-grade energy that reclaims fuel is used for generating, steam output per ton can reclaim the 340 above electric weight of degree, realize that simultaneously cold, heat and electricity three-way produces, and the high efficiente callback fume afterheat.Spent acid, salkali waste that the steam Rankine cycle system produces without traditional chemical water treatment system, and because the pure water closed-circuit is adopted in the steam Rankine cycle, avoid oxygen corrosion and the scale problems of traditional boiler of power generation by waste heat, thereby realize the comprehensive cascade utilization of the energy, energy-saving and environmental protection and social benefit are very remarkable.
The objective of the invention is to realize by following measures:
A kind of distributed pneumatic-Rankine combined cycle cold, heat and electricity triple supply device, this device comprises pneumatic circulating device, steam Rankine cycle device, heating arrangement, absorption type refrigerating unit, it is characterized in that:
Pneumatic motor in described pneumatic circulating comprises that gas turbine, internal-combustion engine or Stirling-electric hybrid etc. adopt the pneumatic motor of gas expansion generating;
Described pneumatic circulating refers to that air 27 sends into fuel-burning equipment 29 through gas compressor 28, with fuel 30 mixed combustions, drags pneumatic motor 33 generatings through pneumatic motor 31, and the high-temperature flue gas 32 that pneumatic motor 31 is discharged is discharged after entering the cooling of steam Rankine cycle system.
Described steam Rankine cycle refers to by exhaust heat boiler body 1 saturated vapour 2 out, forms superheated vapor 3-1 through superheater 3, sends into steam turbine 4 and drives generator 5 generatings; Steam turbine 4 exhaust steam 6 out condenses into condensed water 8 at condenser 7, and condensed water 8 is sent into feed water preheater 10, exhaust heat boiler body 1 through feed water pump 9, and exhaust heat boiler body 1 produces saturated vapour again, thereby forms steam Rankine cycle loop.
The steam condensation side of described condenser 7 adopts the operation under positive pressure mode, i.e. the pressure of steam turbine 4 exhaust steam out is higher than atmospheric pressure, thereby avoids bleeding of air, and the steam Rankine cycle need not to arrange traditional oxygen-eliminating device in the loop.
Described heating system refers to heat supply water 11 through heat supply water pump 12, heat exchanger 13, condenser 7, forms heating steam (hot water) 15.
Described absorption system refers to heating steam (hot water) 15 as the thermal source of absorption type refrigerating unit 16, forms condensed water 17 after cooling.
Superheater 3, feed water preheater 10, the heat exchanger 13 of the high-temperature flue gas 32 that pneumatic motor 31 is discharged in exhaust heat boiler body 1 and flue 26 enters atmosphere after lowering the temperature.
When described heat exchanger 13 adopted the separated type heat exchange mode, heat exchanger 13 comprised vaporizer 13-1, condenser 13-2, and phase-change working substance wherein adopts water or other suitable materials;
Phase-change working substance absorbs the heat generation saturated vapour of flue gas in vaporizer 13-1, saturated vapour is by condenser 13-2 and heat supply water wall-type heat exchange, cooling rear formation condensation water is absorbed the heat generation steam of flue gas again by vaporizer 13-1, thereby forms the inner cyclic process of phase-change working substance; Phase-change working substance adopts natural circulation or pump circulation mode, completes the inner cyclic process of phase-change working substance vaporizer 13-1, condenser 13-2 in heat exchanger 13; Preferred method is the split type layout of vaporizer, condenser, vaporizer 13-1 is arranged in flue 26, condenser 13-2 is arranged in outside flue, adopts natural circulation mode: high-temperature flue gas 32 enters atmosphere after the vaporizer 13-1 of exhaust heat boiler body 1, heating surface superheater 3, feed water preheater 10, heat exchanger 13 cooling; Heat supply water 11 is sent into condenser 7 through heat supply water pump 12, condenser 13-2, forms heating steam (hot water) 15.
Be provided with the makeup Water System supporting with the steam Rankine cycle system: the distilled water 19 in distilled water tank 20 fills into the steam Rankine cycle system after small pump 21, normal temp. deaerator 22 deoxygenations, mixed bed 23 desalinations.
Be provided with heat exchanger 14: that adopts steam turbine 4 draws gas 25 as thermal source, and heat supply water 11 forms heating steam (hot water) 15 after heat supply water pump 12, heat exchanger 13, condenser 7, heat exchanger 14 heating.
Be provided with thermal accumulator 18: when heating system and absorption system fluctuation of load were larger, available thermal accumulator 18 balance sysmtes made steam Rankine cycle system energy safety, stable operation.
Described feed water preheater 10,, heat exchanger 13, superheater 3, thermal accumulator 18, condenser 7, heat exchanger 14 can arrange respectively one or morely, adopts series, parallel or series-parallel connection mode to connect.
Device of the present invention can be applied to the station boiler system of combined cycle equally, through condenser 7 add thermogenetic hot water or steam can be used for existing circulating power station boiler or in addition steam generator system use as boiler working substance.
In the present invention, the heat-exchanging element of mentioned aforementioned device can adopt tubulation, fin tube, coiler or spiral groove pipe, or adopts the pipe of other augmentation of heat transfer measures or the hollow cavity heat-exchanging element of other patterns.
Control a little higher than flue gas acid dew point temperature of wall surface temperature of the vaporizer 13-1 heat exchanger surface of heat exchanger 13, or the cold end corrosion of adopting corrosion-resistant material effectively to alleviate flue gas, can effectively reduce temperature of exhaust fume, avoid flue gas low-temperature corrosion time, the high efficiente callback fume afterheat.
Unaccounted equipment and standby system thereof, pipeline, instrument, valve in 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 the safety regulating device with distributed industrial boiler cold, heat and electricity triple supply matched with devices of the present invention, make device can economy, safety, high thermal efficiency operation, reach purpose energy-saving and cost-reducing, environmental protection.
The present invention has following advantage compared to existing technology:
1, energy-saving effect is remarkable: in the present invention, the pressure energy of Rankine cycle steam is broken through traditional Rankine cycle technical limitations, can conveniently adopt high pressure, subcritical, overcritical even ultra supercritical pressure and need not to use the reheat vapor cycle technology, temperature during vapor (steam) temperature can be selected, inferior high temperature, effectively reduce engineering cost, thereby effectively improve thermal efficiency of cycle and circulating generation amount, the fully sure generated energy that reduces when offsetting in traditional Rankine cycle unit from back pressure to the negative pressure condensing temperature, only steam output per ton (or 0.7MW heating load) just can reclaim the 340 above electric weight of degree, the thermal efficiency of whole Integrated Energy cascade utilization system can reach more than 80%.
2, adopt the indirect heating mode: the steam Rankine cycle system adopts indirect heating, malleation, closed operation mode to hot user, for hot user and absorption system provide thermal source, the direct open type heat-supplying mode that is different from traditional back pressure or sucking condensing type unit, with the condenser of steam Rankine cycle system as outer heater for steam or hot water, whole closed-circuit retrieval systems of condensed water and without loss of steam and water.
3, low equipment investment, operating cost significantly descend:
(1) eliminated that traditional vapour condenser negative pressure operation technique inevitably leaks gas, water leakage phenomenon, need not oxygen-eliminating device, air ejector to be set, the loss of steam and water of having avoided the operations such as traditional oxygen-eliminating device, air ejector to cause in the Rankine cycle loop; Avoid conventional art to reclaim 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 fill 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 significantly descends, and need not to be equipped with huge, complicated chemical water treatment system, the operating cost of water treatment system significantly descends, and absolute value can reduce by 90%;
(3) much smaller than traditional vapour condenser because of the exhaust steam specific volume of steam turbine, the volume of steam turbine can significantly reduce, vapour condenser volume ratio conventional art much smaller, thereby the relative price of steam turbine, condenser apparatus reduces a lot.
4, fume afterheat high efficiente callback: when the heat exchanger that back-end ductwork arranges adopts phase-change heat-exchanger, waste heat that can the high efficiente callback flue gas, temperature of exhaust fume can be reduced to 120 ℃ of left and right; Owing to adopting the outer air preheater technology of stove, air preheater is effectively avoided because of the air short circuit phenomenon that dust contained flue gas, cold end corrosion etc. causes, and layout is very convenient, and air preheater heating process is in conjunction with phase-change heat transfer, and facility compact, heat transfer are efficiently.
5, safety in operation obviously improves:
(1) because adopting the malleation mode, back pressure moves, steam turbine outlet exhaust steam can guarantee certain degree of superheat, design, operation and safety problem that traditional Rankine cycle power generator turbine exhaust stage blade brings because of wet vapor have been overcome, steam turbine back pressure operation under positive pressure, outlet steam is superheated vapor, Design of Problems, manufacturing and operation problem that in traditional steam Rankine cycle, last stage vane of steam turbine brings because of wet vapor have fundamentally been eliminated, 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 the accidents such as the overheated booster of heating surface, and the operating conditions of superheater obviously improves, and Security obviously improves.
6, can conveniently realize cascaded utilization of energy: fuel tolerance is wide, can adopt easily coal, biomass fuel, oil gas etc.Than traditional technology, realized very easily consuming energy according to its quality, can conveniently realize supplying superheated vapor, high-temperature-hot-water, effectively realize three alliances of cool and thermal power, the cascade utilization rate of energy is high, and overall energetic efficiency is apparently higher than Generator Set.
7, solve traditional small capacity Combined Cycle Unit and industrial boiler and can't use the technical barrier of cogeneration of heat and power because of reasons such as water treatments, it is the breakthrough to conventional art, alleviated largely the spent acid in traditional Rankine cycle technology, the pollution problem that salkali waste causes, the sewer of the minute quantity of steam generator system also can be effectively addressed by water charging system.
8, the outage of supply system, short of electricity self-insurance ability strengthen, when external power supply system outage, the power generation system of industrial boiler cold, heat and electricity triple supply device can be to the key equipment self-insurance of powering, strengthen safety operation elasticity and the flexibility of whole system, be convenient to the rapid enforcement of safe emergency measure.
Description of drawings
Fig. 1 be of the present invention a kind of distributed pneumatic-Rankine combined cycle cold, heat and electricity triple supply device schematic flow sheet.
in Fig. 1: 1-exhaust heat boiler body, the 2-saturated vapour, the 3-superheater, the 3-1-superheated vapor, the 4-steam turbine, the 5-generator, the 6-exhaust steam, the 7-condenser, the 8-condensed water, the 9-feed water pump, the 10-feed water preheater, 11-heat supply water, 12-heat supply water pump, the 13-heat exchanger, the 13-1-vaporizer, the 13-2-condenser, the 14-heat exchanger, 15-heating steam (hot water), the 16-absorption type refrigerating unit, the 17-condensed water, the 18-thermal accumulator, 19-distilled water, the 20-distilled water tank, the 21-small pump, the 22-normal temp. deaerator, the 23-mixed bed, the 24-waterpipe that backflows, 25-draws gas, the 26-flue, the 27-air, the 28-gas compressor, the 29-fuel-burning equipment, 30-fuel, the 31-pneumatic motor, the 32-high-temperature flue gas, the 33-generator.
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 distributed pneumatic-Rankine combined cycle cold, heat and electricity triple supply device, this device comprises pneumatic circulating device, steam Rankine cycle device, heating arrangement, absorption type refrigerating unit, specific embodiment is as follows:
Pneumatic motor in described pneumatic circulating adopts gas turbine;
Described pneumatic circulating refers to that air 27 sends into fuel-burning equipment 29 through gas compressor 28, with fuel 30 mixed combustions, drags pneumatic motor 33 generatings through pneumatic motor 31, and the high-temperature flue gas 32 that pneumatic motor 31 is discharged is discharged after entering the cooling of steam Rankine cycle system.
Described steam Rankine cycle refers to by exhaust heat boiler body 1 saturated vapour 2 out, forms superheated vapor 3-1 through superheater 3, sends into steam turbine 4 and drives generator 5 generatings; Steam turbine 4 exhaust steam 6 out condenses into condensed water 8 at condenser 7, and condensed water 8 is sent into feed water preheater 10, exhaust heat boiler body 1 through feed water pump 9, and exhaust heat boiler body 1 produces saturated vapour again, thereby forms steam Rankine cycle loop.
The steam condensation side of described condenser 7 adopts the operation under positive pressure mode, i.e. the pressure of steam turbine 4 exhaust steam out is higher than atmospheric pressure, thereby avoids bleeding of air, and the steam Rankine cycle need not to arrange traditional oxygen-eliminating device in the loop.
Described heating system refers to heat supply water 11 through heat supply water pump 12, heat exchanger 13, condenser 7, forms heating steam (hot water) 15.
Described absorption system refers to heating steam (hot water) 15 as the thermal source of absorption type refrigerating unit 16, forms condensed water 17 after cooling.
Described heat exchanger 13 adopts the separated type heat exchange mode, heat exchanger 13 comprises vaporizer 13-1, condenser 13-2, phase-change working substance wherein adopts water, adopt natural circulation mode, the high-temperature flue gas that fuel combustion produces enters atmosphere after the vaporizer 13-1 of boiler body 1, heating surface superheater 3, feed water preheater 10, heat exchanger 13 cooling; Heat supply water 11 is sent into condenser 7 through heat supply water pump 12, condenser 13-2, forms heating steam (hot water) 15.
Be provided with the makeup Water System supporting with the steam Rankine cycle system: the distilled water 19 in distilled water tank 20 fills into the steam Rankine cycle system through small pump 21, normal temp. deaerator 22.
Be provided with heat exchanger 14: that adopts steam turbine 4 draws gas 25 as thermal source, and heat supply water 11 forms heating steam (hot water) 15 after heat supply water pump 12, heat exchanger 13, condenser 7, heat exchanger 14 heating.
Be provided with thermal accumulator 18: when heating system and absorption system fluctuation of load were larger, available thermal accumulator 18 balance sysmtes made steam Rankine cycle system energy safety, stable operation.
Described feed water preheater 10,, heat exchanger 13, superheater 3, thermal accumulator 18, condenser 7, heat exchanger 14 can arrange respectively one or morely, adopts series, parallel or series-parallel connection mode to connect.
In the present invention, the heat-exchanging element of mentioned aforementioned device can adopt tubulation, fin tube, coiler or spiral groove pipe, or adopts the pipe of other augmentation of heat transfer measures or the hollow cavity heat-exchanging element of other patterns.
Control a little higher than flue gas acid dew point temperature of wall surface temperature of the vaporizer 13-1 heat exchanger surface of heat exchanger 13, or the cold end corrosion of adopting corrosion-resistant material effectively to alleviate flue gas, can effectively reduce temperature of exhaust fume, avoid flue gas low-temperature corrosion time, the high efficiente callback fume afterheat.
Unaccounted equipment and standby system thereof, pipeline, instrument, valve in 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 the safety regulating device with distributed industrial boiler cold, heat and electricity triple supply matched with devices of the present invention, make device can economy, safety, high thermal efficiency operation, reach purpose energy-saving and cost-reducing, environmental protection.
Although the present invention with preferred embodiment openly as above, they are not to limit the present invention, anyly are familiar with this skill person, without departing from the spirit and scope of the invention, certainly when making various changes or retouch, belong to equally the present invention's protection domain.Therefore protection scope of the present invention should with the application claim was defined is as the criterion.
Claims (13)
- One kind distributed pneumatic-Rankine combined cycle cold, heat and electricity triple supply device, this device comprises pneumatic circulating, steam Rankine cycle system, heating system, absorption system, it is characterized in that:Described pneumatic circulating, refer to that air (27) sends into fuel-burning equipment (29) through gas compressor (28), with fuel (30) mixed combustion, drag pneumatic motor (33) generating through pneumatic motor (31), the high-temperature flue gas (32) that pneumatic motor (31) is discharged is discharged after entering the cooling of steam Rankine cycle system;Described steam Rankine cycle refers to by exhaust heat boiler body (1) saturated vapour (2) out, forms superheated vapor (3-1) through superheater (3), sends into steam turbine (4) and drives generator (5) generating; Steam turbine (4) exhaust steam (6) out condenses into condensed water (8) at condenser (7), condensed water (8) is sent into exhaust heat boiler body (1) through feed water pump (9), exhaust heat boiler body (1) produces saturated vapour again, thereby forms malleation steam Rankine cycle loop;The steam condensation side of described condenser (7) adopts the operation under positive pressure mode, i.e. the pressure of steam turbine (4) exhaust steam out is higher than atmospheric pressure.
- 2. device according to claim 1 is characterized in that:Be provided with feed water preheater (10):By exhaust heat boiler body (1) saturated vapour (2) out, form superheated vapor (3-1) through superheater (3), send into steam turbine (4) and drive generator (5) generating; Steam turbine (4) exhaust steam (6) out condenses into condensed water (8) at condenser (7), condensed water (8) is sent into exhaust heat boiler body (1) through feed water pump (9), feed water preheater (10), exhaust heat boiler body (1) produces saturated vapour again, thereby forms steam Rankine cycle loop.
- 3. device according to claim 2 is characterized in that:Be provided with heating system: the outlet exhaust steam (6) of steam turbine (4) is returned to the steam Rankine cycle system through the cooling formation condensed water of condenser (7) (8); Heat supply water (11) forms heating steam or hot water (15) through heat supply water pump (12), condenser (7).
- 4. device according to claim 3 is characterized in that:Be provided with heat exchanger (13): heat supply water (11) forms heating steam or hot water (15) through heat supply water pump (12), heat exchanger (13), condenser (7); Flue gas through exhaust heat boiler body (1), superheater (3) or and feed water preheater (10), heat exchanger (13) cooling after discharge.
- 5. device according to claim 4 is characterized in that:Be provided with heat exchanger (14): draw gas (25) of steam turbine (4) form condensed water through heat exchanger (14) and return to the steam Rankine cycle system; Heat supply water (11) is through heat supply water pump (12) or and heat exchanger (13), condenser (7), heat exchanger (14) formation heating steam or hot water (15).
- 6. device according to claim 5 is characterized in that:Be provided with absorption system: heating steam or hot water (15) is as the thermal source of absorption type refrigerating unit (16), formation condensed water (17) after absorption type refrigerating unit (16) is cooling.
- 7. device according to claim 6 is characterized in that:Be provided with thermal accumulator (18): when heating system and absorption system fluctuation of load were larger, heating steam or hot water (15) carried out stand-by heat through thermal accumulator (18).
- One of according to claim 1 to 7 described device, it is characterized in that:Be provided with makeup Water System: the distilled water (19) in distilled water tank (20) fills into the steam Rankine cycle system through small pump (21), normal temp. deaerator (22).
- One of according to claim 1 to 7 described device, it is characterized in that:Be provided with mixed bed (23): the distilled water (19) in distilled water tank (20) fills into the steam Rankine cycle system through small pump (21), normal temp. deaerator (22), mixed bed (23).
- 10. device according to claim 4 is characterized in that:Described heat exchanger 13 adopts dividing wall type or separated type heat exchange mode with flue gas.
- 11. device according to claim 10 is characterized in that:Heat supply water (11) in described heat exchanger (13) adopts the separated type heat exchange mode with flue gas, and heat exchanger (13) comprises vaporizer (13-1), condenser (13-2); Vaporizer (13-1) is arranged in fume side, follows the flue gas wall-type heat exchange by phase-change working substance, and the phase-change working substance heat absorption produces steam, discharges after flue gas cool-down; Phase-change working substance steam is by condenser (13-2) and heat supply water (11) wall-type heat exchange, and cooling rear formation condensation water is absorbed the heat generation steam of flue gas again by vaporizer (13-1), thereby forms the inner cyclic process of phase-change working substance.
- 12. device according to claim 1 is characterized in that:Device of the present invention can be applied to existing station boiler or other station boilers equally: through condenser (7) add thermogenetic hot water or steam as existing station boiler or in addition the working medium of station boiler system use.
- 13. device according to claim 7 is characterized in that:Described feed water preheater (10), heat exchanger (13), heat exchanger (14), air preheater (29), superheater (3), thermal accumulator (18), condenser (7) can arrange respectively one or more, adopt series, parallel or series-parallel connection mode to connect.
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