CN105444247A - Regional energy supply system based on comprehensive recycle of various low-grade waste heat - Google Patents
Regional energy supply system based on comprehensive recycle of various low-grade waste heat Download PDFInfo
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- CN105444247A CN105444247A CN201510985613.XA CN201510985613A CN105444247A CN 105444247 A CN105444247 A CN 105444247A CN 201510985613 A CN201510985613 A CN 201510985613A CN 105444247 A CN105444247 A CN 105444247A
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- 239000002918 waste heat Substances 0.000 title claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 82
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 238000010248 power generation Methods 0.000 claims abstract description 20
- 230000005611 electricity Effects 0.000 claims abstract description 11
- 238000003860 storage Methods 0.000 claims description 35
- 238000011084 recovery Methods 0.000 claims description 23
- 239000008400 supply water Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 230000003020 moisturizing effect Effects 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims description 2
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000009826 distribution Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000003517 fume Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/001—Central heating systems using heat accumulated in storage masses district heating system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
- F24D11/005—Central heating systems using heat accumulated in storage masses water heating system with recuperation of waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D12/00—Other central heating systems
- F24D12/02—Other central heating systems having more than one heat source
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
-
- 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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to a regional energy supply system based on comprehensive recycle of various low-grade waste heat. The regional energy supply system comprises a waste heat collecting subsystem, an energy station subsystem, a heat supply subsystem, an organic Rankine circulating power generation subsystem and a domestic hot water supply subsystem. According to the system, various industrial low-grade waste heat which is distributed in different heat source forms, within different temperature ranges and on different positions and is generated by high-energy-consumption industrial enterprises at the peripheries of towns is comprehensively recycled through the waste heat collecting subsystem to realize cascade heat exchange, and the waste heat is centrally accumulated in the energy station subsystem and is optimally distributed into the heat supply subsystem, the organic Rankine circulating power generation subsystem and the domestic hot water supply subsystem, so that various energy using demands such as heating, electricity utilization and domestic hot water of urban residents and industrial enterprises are met, the regional energy supply system is formed, and the efficient and large-scale comprehensive recycle of low-grade waste heat is realized within the whole year.
Description
Technical field
The invention belongs to energy-conserving and environment-protective technical field, particularly based on the Regional Energy supply system that multiple low grade residual heat integrative is recycled.
Background technology
Need in industrial processes to consume a large amount of energy, and in the technological process of production, produce a large amount of waste heats.Along with the continuous propelling of China's industrial energy saving work, the industrial exhaust heat of middle GOOD TASTE has obtained at present and has comparatively effectively utilized, but the industrial low grade residual heats such as the liquid of such as less than 100 DEG C, the flue gas of less than 400 DEG C, still extensively and be present in a large number in the high energy consumption industries such as iron and steel, non-ferrous metal, building materials, petrochemical industry, chemical industry and electric power.This part waste heat because of its energy grad low, traditional Land use systems cannot meet the demands, and is not usually fully utilized, and causes a large amount of energy wastes, and exacerbates environmental pollution.
The energy such as a large amount of heating, electricity consumption and domestic water demand is there is in town dweller's life and industrial processes.These are produced and life is used and mainly from fossil energy, can be caused serious atmosphere pollution.Especially a large amount of uses of coal are one of main reason of northern area Heating Period haze weather.Therefore, in the area that energy consumption is larger, if take effective mode, the multiple low grade residual heat integrative industrial enterprise of cities and towns periphery produced is recycled, substitute fossil energy, what meet the productive life of town dweller and industrial enterprise uses energy demand, will promote China's energy-saving and emission-reduction and prevention and control of air pollution work effectively.
In recent years, along with the continuous progress of power-saving technology, some low grade residual heat recoverying and utilizing methods and device start to occur.Wherein: utilize low grade residual heat to heat to start to have had some engineer applied among a small circle to attempt; The low grade residual heat electricity generation system of organic Rankine bottoming cycle is adopted tentatively to enter the commercial applications stage; Sample by heat pump lifting waste heat the system be used again to be also suggested.But mainly there is following problem in these method and apparatus:
1. from waste heat recovery side, waste heat source and form single.Waste heat, all from the single source of a certain form of a certain industrial enterprise, lacks considering the multiple residual heat resources of different heat sources form, temperature range, waste heat amount and position distribution;
2., from UTILIZATION OF VESIDUAL HEAT IN side, there is many restrictions.Such as: if be only used for heating, waste heat can be caused cannot to use in non-heating period; If only for generating, efficiency of energy utilization is not high; And promote waste heat taste by newly-increased heat pump, not only need to consume a part of high-grade electric energy, but also improve the investment construction cost of system;
3. as a whole; still lack a kind of method and the apparatus system that can carry out high efficiency synthetical recovery and scale utilization to industrial low grade residual heat at present; energy supply service can be provided for zone user, meet the multiple energy such as the heating of town dweller and industrial enterprise, electricity consumption and domestic hot-water demand.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art; the object of the present invention is to provide a kind of Regional Energy supply system recycled based on multiple low grade residual heat integrative; by taking different heat exchanger series connection and/or parallel combination at waste heat recovery end; mate the multiple industrial low grade residual heat of different heat resource forms, temperature range, waste heat amount and position distribution, realize high efficiency and the scale synthetical recovery of waste heat.
Another object of the present invention is to provide a kind of Regional Energy supply system recycled based on multiple low grade residual heat integrative; UTILIZATION OF VESIDUAL HEAT IN end heat outputting, electricity and domestic hot-water; meet the multiple energy such as the heating of town dweller and industrial enterprise, electricity consumption and domestic hot-water demand, realize high efficiency and the scale comprehensive utilization of waste heat.
Object of the present invention can be achieved through the following technical solutions:
Based on the Regional Energy supply system that multiple low grade residual heat integrative is recycled, comprise waste heat acquisition subsystem, energy source station subsystem, supply thermal sub-system, organic Rankine bottoming cycle power generation sub-system and domestic hot-water supply subsystem;
Described waste heat acquisition subsystem gathers circulating pump, cryogenic heat exchanger, mid temperature heat exchanger, high-temperature heat-exchanging and connecting line by waste heat and control valve is connected in sequence;
Described energy source station subsystem is made up of storage heater, energy supply circulating pump, recovery tank and connecting line and control valve;
Described confession thermal sub-system, primarily of heat supply initial station heat exchanger, heat circulation pump and heat supplying pipeline and control valve composition, is connected to cities and towns central heating network, realizes central heating;
Described organic Rankine bottoming cycle power generation sub-system is in turn connected to form closed circuit by organic working medium circulating pump, preheater, evaporimeter, screw expander, condenser, fluid reservoir and pipeline and control valve, and produce electric energy by described screw expansion machine driving generator, realize grid-connected power supply;
Described domestic hot-water supply subsystem is delivered to user primarily of domestic hot-water's supply-water pump through corresponding pipeline and control valve, realizes domestic hot-water supply.
Described waste heat acquisition subsystem, confession thermal sub-system, organic Rankine bottoming cycle power generation sub-system are connected with recovery tank with the storage heater of described energy source station subsystem with the end of domestic hot-water supply subsystem, respectively to maintain quality and the energy balance of system; Described domestic hot-water supply subsystem connects with the storage heater of described energy source station subsystem.
Described low grade residual heat refers to the industrial exhaust heat such as the liquid of 50 ~ 100 DEG C and the flue gas of less than 400 DEG C.
Described waste heat acquisition subsystem, energy source station subsystem, be water for the heat-exchange working medium of thermal sub-system and domestic hot-water supply subsystem, the working medium of described organic Rankine bottoming cycle power generation sub-system is lower boiling organic working medium.
Described control valve is electromagnetic type, and radio frequency control apparatus is housed.
Described waste heat gathers circulating pump, energy supply circulating pump, heat supply one secondary net circulating pump, organic working medium circulating pump and domestic hot-water's supply-water pump and is equipped with frequency conversion facility, and radio frequency control apparatus is housed.
In described waste heat acquisition subsystem: the low grade residual heat of relative low temperature, middle gentle high temperature in the external thermal source of cryogenic heat exchanger, mid temperature heat exchanger and high-temperature heat-exchanging difference, according to the difference of heat resource form, heat exchanger types is the one in water-water heat exchanger or air-water heat exchanger accordingly.According to the difference of heat resource form, temperature range, waste heat amount and position distribution, by controlling the opening and closing of each control valve, realize the series connection between each heat exchanger and/or parallel combination, realize the step heat exchange to various heating sources, promote overall heat exchange efficiency, and be further advanced by VFC waste heat and gather circulating pump, thus reach required temperature and flow during the storage heater making subsystem outlet water at tail end enter in described energy source station subsystem.
In described energy source station subsystem: the heat energy accumulation that described waste heat acquisition subsystem gathers by storage heater, and realize level and smooth output by energy supply circulating pump; By controlling related valve, the hot water accumulated in storage heater can partly or entirely be pumped in the heat supply initial station heat exchanger of described confession thermal sub-system by energy supply circulating pump according to demand, or heat exchange is carried out to the evaporimeter and preheater of described organic Rankine bottoming cycle power generation sub-system, meanwhile, can also be further advanced by domestic hot-water's supply-water pump is pumped in described domestic hot-water supply subsystem; Carry from storage heater hot water out through energy supply circulating pump, after completing heat exchange, part is by recovery tank, and remainder directly passes through non-return valve, gather circulating pump via the waste heat in described waste heat acquisition subsystem, finally all get back in described waste heat acquisition subsystem; Recovery tank has moisturizing and retaining energy supply, to maintain the mass balance taking thermal cycle; Be equipped with sensor-based system in storage heater and recovery tank, comprise temperature, pressure and level sensor.
In described organic Rankine bottoming cycle power generation sub-system: preheater and evaporimeter are shell-and-tube organic working medium-water-to-water heat exchanger, organic working medium wherein with hot water heat exchange after, become the gas working medium of high pressure, drive screw decompressor do work, thus pushing generator generating; Gas working medium after overexpansion, becomes liquid state to enter into fluid reservoir through external cooling water condensation within the condenser, then is got back in preheater and evaporimeter by working medium pump, completes whole organic Rankine bottoming cycle and electricity generation grid-connecting, realizes power supply.
In described confession thermal sub-system: heat supply initial station heat exchanger is liquid-liquid type heat exchanger, after the heat exchange wherein of heat supply backwater, is delivered to cities and towns central heating network, realizes heat supply by heat circulation pump through a pipe network.
In described domestic hot-water supply subsystem: domestic hot-water is delivered to user via domestic hot-water's supply-water pump from the storage heater described energy source station subsystem, realizes domestic hot-water supply.
Compared with prior art, the present invention has following beneficial effect:
1. can carry out synthetical recovery to the multiple industrial low grade residual heat resource of the different heat sources form of the high energy-consuming industry enterprise of cities and towns periphery, temperature range and position distribution;
2. can meet the multiple energy such as the heating of town dweller and industrial enterprise, electricity consumption and domestic hot-water demand;
3. can realize the high efficiency to low grade residual heat and scale recycling, forming region energy supply system, substitutes fossil energy, promotes energy-saving and emission-reduction and prevention and control of air pollution.
Accompanying drawing explanation
Fig. 1 is system principle schematic diagram of the present invention.
Wherein: waste heat gathers circulating pump 1; Cryogenic heat exchanger 2; Mid temperature heat exchanger 3; High-temperature heat-exchanging 4; Storage heater 5; Energy supply circulating pump 6; Heat supply initial station heat exchanger 7; Recovery tank 8; Evaporimeter 9; Preheater 10; Heat circulation pump 11; Organic working medium circulating pump 12; Screw expander 13; Generator 14; Condenser 15; Fluid reservoir 16; Storage heater sensor-based system (comprising temperature, pressure, water level) 17; Recovery tank sensor-based system (comprising temperature, pressure, water level) 18; Domestic hot-water's supply-water pump 19; Control valve 2001 ~ 2022.
Detailed description of the invention
Below in conjunction with Fig. 1, the present invention is described further.
Embodiment 1: as shown in Figure 1, based on the Regional Energy supply system that multiple low grade residual heat integrative is recycled, comprises waste heat acquisition subsystem, energy source station subsystem, supplies thermal sub-system, organic Rankine bottoming cycle power generation sub-system and domestic hot-water supply subsystem.
Waste heat acquisition subsystem gathers circulating pump 1, cryogenic heat exchanger 2, mid temperature heat exchanger 3, high-temperature heat-exchanging 4 and connecting line by waste heat and control valve 2001 ~ 2009,2018 forms; Energy source station subsystem is made up of storage heater 5, energy supply circulating pump 6, recovery tank 8 and connecting line and control valve 2010 ~ 2017; Be made up of heat supply initial station heat exchanger 7, heat circulation pump 11 and heat supplying pipeline and control valve 2019 for thermal sub-system; Organic Rankine bottoming cycle power generation sub-system is made up of organic working medium circulating pump 12, preheater 10, evaporimeter 9, screw expander 13, condenser 15, fluid reservoir 16, generator 14 and connecting line and control valve 2021; Domestic hot-water supply subsystem is made up of domestic hot-water's supply-water pump 19 and connecting line and control valve 2020.
Waste heat acquisition subsystem, confession thermal sub-system, organic Rankine bottoming cycle power generation sub-system are connected with recovery tank 8 with the storage heater 5 of energy source station subsystem with the end of domestic hot-water supply subsystem, respectively to maintain quality and the energy balance of system; Domestic hot-water supply subsystem connects with the storage heater 5 of energy source station subsystem.
In waste heat acquisition subsystem, the comparatively low-temperature water heating waste heat of external about 50 DEG C of cryogenic heat exchanger 2, the higher temperatures afterheat of hot water of external about 90 DEG C of mid temperature heat exchanger 3, the fume afterheat that high-temperature heat-exchanging 4 is external about 350 DEG C; Manipulate radio frequency control apparatus by control system simultaneously, opening controlling valve 2001 ~ 2003,2006,2007,2018, closed control valve 2004,2005,2008,2009, cryogenic heat exchanger 2, mid temperature heat exchanger 3 and high-temperature heat-exchanging 4 are connected in series, and coordinate the circulating water flow controlling waste heat collection circulating pump 1, make the hot water of the storage heater 5 entered in energy source station subsystem reach about 95 DEG C.
Energy source station subsystem plays to be accumulated the energy of whole system, dispatches and balance control action.The heat energy accumulation that described waste heat acquisition subsystem gathers by storage heater 5, and realize level and smooth output by energy supply circulating pump 6.In the winter time under heating period operating mode: control valve 2013 standard-sized sheet, in storage heater 5, hot water preferentially enters in thermal sub-system, meets heat demand, if low grade residual heat resource is sufficient, control valve 2014 meanwhile partially opens, and hot water more than needed enters organic Rankine bottoming cycle power generation sub-system, for generating; If low grade residual heat resource is inadequate, then complete closed control valve 2014, organic Rankine bottoming cycle power generation sub-system out of service.Under non-heating period operating mode: control valve 2013 full cut-off, out of service for thermal sub-system; Control valve 2014 standard-sized sheet, in storage heater 5, hot water enters in organic Rankine bottoming cycle power generation sub-system, for generating.Under heating period and non-heating period operating mode, in storage heater 5, hot water is also delivered in domestic hot-water supply subsystem by domestic hot-water's supply-water pump 19 simultaneously, realizes domestic hot-water supply.From storage heater 5 hot water out after heat exchange, part is by recovery tank 8, and remainder, directly by non-return valve 2022, gathers circulating pump 1 via waste heat, finally all gets back in waste heat acquisition subsystem; Recovery tank 8 has moisturizing and retaining energy supply, to maintain the mass balance taking thermal cycle; Be equipped with sensor-based system 17,18 in storage heater 5 and recovery tank 8, comprise temperature, pressure and level sensor, control system controls the operation of other correlation subsystem by these parameters, and what meet user uses energy demand, and maintains the energy balance of whole system.
At heating period, in storage heater 5, hot water enters in thermal sub-system, preferentially meets heat demand, and heat supply backwater with it after heat exchange, is delivered to cities and towns central heating network by heat circulation pump 11 through a pipe network, realizes heat supply in the heat exchanger 7 of heat supply initial station.
At non-heating period or heating period and low grade residual heat resource is sufficient time, the hot water in storage heater 5 enters successively in evaporimeter 9 and preheater 10 and carries out heat exchange with organic working medium; Organic working medium absorbs heat energy successively in preheater 10 and evaporimeter 9, becomes the gas working medium of high pressure, and drive screw decompressor 13 does work, thus pushing generator 14 generates electricity; Gas working medium after overexpansion, becomes liquid state to enter into fluid reservoir 16 through external cooling water condensation in condenser 15, then is got back in preheater 10 and evaporimeter 9 by working medium pump 12, completes whole organic Rankine bottoming cycle and electricity generation grid-connecting, realizes power supply.
Under heating period and non-heating period operating mode, in storage heater 5, hot water can also be delivered to user via domestic hot-water's supply-water pump 19 simultaneously, realizes domestic hot-water supply.
Embodiment 2: as shown in Figure 1, based on the Regional Energy supply system that multiple low grade residual heat integrative is recycled, the present embodiment is identical with embodiment 1, the comparatively low-temperature water heating waste heat of external about 70 DEG C of the cryogenic heat exchanger 2 wherein in waste heat acquisition subsystem, the higher temperatures afterheat of hot water of external about 90 DEG C of mid temperature heat exchanger 3, the fume afterheat that high-temperature heat-exchanging 4 is external about 250 DEG C; Radio frequency control apparatus is manipulated by control system, opening controlling valve 2001 ~ 2005,2008,2009,2018, closed control valve 2006,2007, cryogenic heat exchanger 2, mid temperature heat exchanger 3 and high-temperature heat-exchanging 4 are connected in parallel, and coordinate the circulating water flow controlling waste heat collection circulating pump 1, make the hot water of the storage heater 5 entering energy source station subsystem reach about 80 DEG C.
Embodiment 3: as shown in Figure 1, based on the Regional Energy supply system that multiple low grade residual heat integrative is recycled, the present embodiment is identical with embodiment 2, the comparatively low-temperature water heating waste heat of external about 60 DEG C of the cryogenic heat exchanger 2 wherein in waste heat acquisition subsystem, the higher temperatures afterheat of hot water of external about 90 DEG C of mid temperature heat exchanger 3, the fume afterheat that high-temperature heat-exchanging 4 is external about 300 DEG C; Manipulate radio frequency control apparatus by control system simultaneously, opening controlling valve 2001 ~ 2003,2005 ~ 2006,2009,2018, closed control valve 2004,2007,2008, mid temperature heat exchanger 3 and high-temperature heat-exchanging 4 are connected in parallel, be connected in series with the cryogenic heat exchanger 2 of front end, loop again, and coordinate the circulating water flow controlling waste heat collection circulating pump, make the hot water of the storage heater entering energy source station subsystem reach about 90 DEG C.
Above embodiment is explained in detail specific embodiment of the invention by reference to the accompanying drawings, but due at waste heat recovery end and utilize end can have multiple combination mode, meets different from can demand.Those of ordinary skill in the art can be easy to improve these embodiments and revise, and need not enter creative work.Therefore, the present invention is not limited to above-described embodiment, and those skilled in the art, according to announcement of the present invention, does not depart from improvement that category of the present invention makes and amendment all should within protection scope of the present invention.
Claims (10)
1. based on the Regional Energy supply system of multiple industrial low grade residual heat comprehensive reutilization, it is characterized in that: comprise waste heat acquisition subsystem, energy source station subsystem, supply thermal sub-system, organic Rankine bottoming cycle power generation sub-system and domestic hot-water supply subsystem;
Described waste heat acquisition subsystem comprises waste heat and gathers circulating pump (1), cryogenic heat exchanger (2), mid temperature heat exchanger (3), high-temperature heat-exchanging (4) and connecting line and control valve (2001 ~ 2009,2018,2022);
Described energy source station subsystem comprises storage heater (5), energy supply circulating pump (6), recovery tank (8) and connecting line and control valve (2010 ~ 2017);
Described confession thermal sub-system comprises heat supply initial station heat exchanger (7), heat circulation pump (11) and heat supplying pipeline and control valve (2019);
Described organic Rankine bottoming cycle power generation sub-system comprises organic working medium circulating pump (12), preheater (10), evaporimeter (9), screw expander (13), condenser (15), fluid reservoir (16), generator (14) and connecting line and control valve (2021);
Described domestic hot-water supply subsystem comprises domestic hot-water's supply-water pump (19) and connecting line and control valve (2020);
Described low grade residual heat refers to the industrial exhaust heat such as the liquid of 50 ~ 100 DEG C and the flue gas of less than 400 DEG C.
2. Regional Energy supply system according to claim 1, it is characterized in that: described waste heat acquisition subsystem, confession thermal sub-system, organic Rankine bottoming cycle power generation sub-system are connected with recovery tank (8) with the storage heater (5) of described energy source station subsystem with the end of domestic hot-water supply subsystem, to maintain quality and the energy balance of system; Described domestic hot-water supply subsystem is connected with the storage heater (5) of described energy source station subsystem.
3. the Regional Energy supply system according to claims 1 or 2, it is characterized in that: in described waste heat acquisition subsystem, the waste heat of relative low temperature, middle gentle high temperature in the external low-grade heat source of cryogenic heat exchanger (2), mid temperature heat exchanger (3) and high-temperature heat-exchanging (4) difference, heat exchanger types is the one of water-water heat exchanger or air-water heat exchanger;
By controlling the opening and closing of each control valve, realize the series connection between each heat exchanger and/or parallel combination, step heat exchange can be realized to various heating sources, promote overall heat exchange efficiency, and be further advanced by VFC waste heat collection circulating pump (1), reach required temperature and flow when subsystem outlet water at tail end is entered in the storage heater (5) in described energy source station subsystem.
4. Regional Energy supply system according to claim 1 and 2, is characterized in that: in described energy source station subsystem, the heat energy accumulation that described waste heat acquisition subsystem gathers by storage heater (5), and realizes smoothly exporting by energy supply circulating pump (6); By controlling relevant control valve (2013 ~ 2014), the hot water accumulated in storage heater (5) can partly or entirely be pumped in heat supply initial station heat exchanger (7) of described confession thermal sub-system by energy supply circulating pump (6) according to demand, or heat exchange is carried out to the evaporimeter (10) and preheater (9) of described organic Rankine bottoming cycle power generation sub-system, meanwhile, can also be further advanced by domestic hot-water's supply-water pump (19) is pumped in described domestic hot-water supply subsystem; From storage heater (5) hot water out after energy supply circulating pump (6) pumping heat exchange, part is by recovery tank (8), remainder is directly by non-return valve (2022), gather circulating pump (1) via the waste heat in described waste heat acquisition subsystem, finally all get back in described waste heat acquisition subsystem; Recovery tank (8) has moisturizing and retaining energy supply, to maintain the mass balance of system; Be equipped with sensor-based system (17,18) in storage heater (5) and recovery tank (8), comprise temperature, pressure and level sensor.
5. Regional Energy supply system according to claim 1 and 2, it is characterized in that: in described organic Rankine bottoming cycle power generation sub-system, preheater (9) and evaporimeter (10) are shell-and-tube organic working medium-water-to-water heat exchanger, organic working medium wherein with hot water heat exchange after, become the gas working medium of high pressure, drive screw decompressor (13) does work, thus pushing generator (14) generating; Gas working medium after overexpansion, in condenser (15), become liquid state to enter into fluid reservoir (16) through external cooling water condensation, got back in preheater (10) and evaporimeter (9) by working medium pump (12) again, complete electricity generation grid-connecting after whole organic Rankine bottoming cycle, realize powering.
6. Regional Energy supply system according to claim 1 and 2, it is characterized in that: in described confession thermal sub-system, heat supply initial station heat exchanger (7) is liquid-liquid type heat exchanger, after the heat exchange wherein of heat supply backwater, by hot recycle pump cities and towns central heating network in a pipe network is carried, realize heat supply.
7. Regional Energy supply system according to claim 1 and 2, it is characterized in that: in described domestic hot-water supply subsystem, domestic hot-water is delivered to user via domestic hot-water's supply-water pump (19) from the storage heater (5) described energy source station subsystem, realizes domestic hot-water supply.
8. Regional Energy supply system according to claim 1 and 2, it is characterized in that: described waste heat acquisition subsystem, the heat-exchange working medium of energy source station subsystem, confession thermal sub-system and domestic hot-water supply subsystem is water, and the working medium of described organic Rankine bottoming cycle power generation sub-system is lower boiling organic working medium.
9. Regional Energy supply system according to claim 1, is characterized in that, described control valve (2001 ~ 2021) is electromagnetic type, and radio frequency control apparatus is housed.
10. Regional Energy supply system according to claim 1, it is characterized in that, described waste heat gathers circulating pump (1), energy supply circulating pump (6), heat supply one secondary net circulating pump (11), organic working medium circulating pump (12) and domestic hot-water's supply-water pump (19) and is equipped with frequency conversion facility, and radio frequency control apparatus is housed.
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Inventor after: Deng Bili Inventor before: Deng Bili Inventor before: Xu Mingchao |