CN204301176U - Reduce the energy-saving heating system of heat supply return water temperature and recovery city used heat - Google Patents
Reduce the energy-saving heating system of heat supply return water temperature and recovery city used heat Download PDFInfo
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Abstract
A kind of energy-saving heating system reducing heat supply return water temperature and reclaim hot city used heat.Introduce multi-stage heat exchanger, multistage absorption heat-exchange unit, multiple compression heat pump, repeatedly heat exchange is carried out to thermal source and improve efficiency of energy utilization, expand area of heat-supply service; Heat exchanger is added in addition in steam power plant, heating pipe network return water temperature is promoted with condensing engine waste heat, introduce the low grade heat energy of steam double-effect absorption heat pump, steam single-effective absorption heat pump, the large temperature difference absorption heat pump of steam, steam water heat exchanger extraction condenser cooling water simultaneously, effectively make use of the heat energy of exhaust steam in steam turbine, improve efficiency of energy utilization.The utility model provide a kind of heating pipe network return water temperature is reduced to less than 2 DEG C and reduces heating pipe network backwater increase to 108 DEG C along journey heat loss, heating pipe network supply backwater temperature difference by original 40 DEG C, reduce heating pipe network circulating water flow and reduce the energy consumption of circulating pump, significantly increase confession the heat flow of user side, raising pipe network transfer efficiency and heat supplying scale, the Waste Heat Recovery of cooling tower is utilized, compression refrigerating machine COP value can reach 8 ~ 9 and reduce the energy-conservation heating systems such as power consumption.
Description
Technical field
The invention belongs to and improve efficiency of energy utilization field, relate to a kind of reduce cogeneration of heat and power heat pipe network return water temperature, reclaim city used heat and the energy-saving heating system significantly expanding heat supplying scale.
Background technology
Although the ladder that current cogeneration of heat and power achieves the energy utilizes, also belong to traditional heating mode, heating efficiency is low, and energy waste is large.Current traditional heating mode Problems existing mainly contains:
1, the used heat that steam power plant's cooling tower distributes is a city the most concentrated maximum heat sources, and be called as " city used heat energy isolated island ", heat can not be transferred away, and cooling tower used heat grade is low, can not be utilized.
2, steam power plant's cooling tower dispersed heat accounts for the 20%-30% of total consumption of coal.
3, steam power plant's cooling tower waste heat need evaporate a large amount of water resources, more severe to the north situation of lack of water.
4, traditional heating system pipe network water supply temperature 110 DEG C, return water temperature 70 DEG C, supply backwater temperature difference is little.
5, the little circulating pump energy consumption that causes of pipe network supply backwater temperature difference that heats is large, and transfer efficiency is low.
6, traditional heating system pipe network return water temperature 70 DEG C, the high-temperature steam heat exchange that direct and steam turbine is extracted out is warmed up to 110 DEG C, needs quantity of steam very large, causes generated energy to reduce.
7, traditional heating system pipe network water supply temperature 110 DEG C, return water temperature 70 DEG C, comparatively large for water return pipeline temperature and the earth temperature difference, supply water and have heat loss, backwater also has heat loss.
8, because the pipe network return water temperature that heats is 70 DEG C, the used heat of power plant cooling tower cannot be added, and causes a large amount of used heat to waste.
9, existing heating network conveying capacity is limited, is difficult to meet the demands, and to expand heating network, then drops into huge and needs brokenly road to construct, being subject to strict restriction in urban core region.
The boiler room of other independently coal-fired or combustion gas of 10, current cogeneration of heat and power ubiquity, by fuel (coal, oil, natural gas etc.) directly combustion heat supplying, only make use of the amount of the energy, obviously be the waste (fire is with falling fire without rising) to high-grade energy, fuel directly burns and equals to slattern the energy of half.China's combustion gas degree of self-sufficiency is not enough, needs a large amount of import, and directly burning utilizes the waste of the energy.
11, the property safe and reliable to operation of independent boiler room is low, if one of them link goes wrong, then can affect whole heating system.
12, in city, heat sources is extensive, as factory's used heat, waste water of spring etc., and becomes spot distribution, is not all recovered utilization.
Based on these problems, my corporation in 2006 obtains the patented technology that the patent No. is ZL200610099043.5, adopt the heat supply method that absorption type heat pump assembly is combined with vapor heat exchanger, the quantity of steam that this system does not change the installed capacity of existing steam power plant and provides, and improve its heat capacity, and the heat capacity increased is equivalent to the heat not consuming steam.The patent No. obtained for 2013 is the utility model patent of CN201320789714.6, CN201320800981.9, CN201320800984.2, by introducing absorption heat exchange unit, repeatedly carry out using with power source and heat exchange to thermal source, improve the utilization ratio of steam source, is better user's heat supply; Introducing steam double-effect absorption heat pump, steam single-effective absorption heat pump, steam large temperature difference absorption heat pump, vapor-water heat exchanger reclaim low-grade heat step by step, effectively make use of the exhaust steam in steam turbine, improve efficiency of energy utilization.These patented technologies, have solved the waste of cooling tower used heat, the problem that the secondary net supply backwater temperature difference that heats is little.But also there is the problems such as heating pipe network supply backwater temperature difference, area of heat-supply service still can significantly improve, this technology adopts multi-stage heat exchanger, multistage absorption heat pump and compression refrigerating machine use in conjunction to be continued to widen by heating pipe network supply backwater temperature difference, abundant recovery condenser waste heat, matter fuel combustion being slatterned heat is effectively combined with the amount of cooling tower wasted heat, produce existing matter again the amount of having be suitable for heat effective heat energy, expand area of heat-supply service, improve heating efficiency.
Summary of the invention
Can not be fully utilized because grade is low for power plant cooling tower used heat, fuel (coal, oil, natural gas etc.) directly combustion heat supplying waste the matter (fire with) of heat, the problem such as heating pipe network supply backwater temperature difference is little, circulating pump energy consumption is large, transfer efficiency is low, water return pipeline heat loss, existing heating network conveying capacity are limited, the invention provides a kind of heating pipe network return water temperature is down to less than 2 DEG C, reclaim city used heat and significantly expand the energy-saving heating system of heat supplying scale.
The technical scheme that the present invention adopts for technical solution problem is:
Comprise steam power plant's extraction for heat supply system, steam-condenser of thermal power plants cooling water system, Region Heating Station heat pump, heating pipe network, heating secondary pipe network, city WHRS,
Region Heating Station side is heated after pipe network water supply carries out heat exchange by heat exchanger and heating secondary pipe network, arranges two-stage absorption heat pump and compression refrigerating machine, heating pipe network return water temperature is reduced to less than 2 DEG C in the backhaul of a heating pipe network, heat reclaim unit is set again and reclaims the city used heat such as industrial exhaust heat along journey, heating pipe network return water temperature is promoted, and then third level absorption heat pump and compression refrigerating machine are set, heating pipe network return water temperature is reduced to less than 2 DEG C, in this procedures system, the driving heat source of absorption heat pump at different levels is the (combustion gas of high-quality heat energy, fuel oil, steam, hot water etc.), the end that heats of absorption heat pump at different levels heats to the backwater of heating secondary pipe network, the low-temperature heat source of first order absorption heat pump is heating pipe network backwater, the low-temperature heat source of the second level and third level absorption heat pump is provided by the condenser end of compression refrigerating machine, the low-temperature heat source of compression refrigerating machine evaporimeter is heating pipe network backwater, a heating pipe network backwater of discharging from most end stage compression type evaporator of refrigerator returns steam power plant,
Heat pipe network backwater in steam power plant by heat exchanger and the heat exchange of steam-condenser of thermal power plants cooling water, reclaim steam power plant's waste heat, pass through steam type absorption heat pump again by temperature increase, drawn gas by steam water heat exchanger and steam turbine in thermal power plant afterwards and carry out heat exchange, obtain 110 DEG C of heating pipe network water supply of conventional heat-supplying mode; Wherein in a heating pipe network return water temperature lifting process, the driving heat source of steam type absorption heat pump is the high-temperature steam that steam turbine is extracted out, and low-temperature heat source is steam-condenser of thermal power plants cooling water.
The invention has the beneficial effects as follows:
1, condenser waste heat can be reclaimed to greatest extent with minimum cost, improve energy utilization rate;
2, the pipe network supply backwater temperature difference that heats increases, and reduces a pipe network circulating water flow, decreases the energy consumption of circulating pump;
3, the temperature that exports of compression refrigerating machine is very low, in fact in the transformation process of market, directly can utilize original refrigeration machine in market and need not invest in addition and purchase heat pump, cost of both can having reduced investment outlay, can save space again, avoiding machine to leave unused;
4, the thermal source of 25 DEG C that absorption heat pump in heating pipe network does not extract can be put forward heat by compression refrigerating machine again, the heat supply temperature difference is continued to widen, and improves heating efficiency;
The backwater of 25 DEG C is cooled to less than 2 DEG C by the compression refrigerating machine 5, in native system, and the water extraction of 25 DEG C is risen to 30 DEG C by condenser side, and only promote 5 DEG C of temperature difference, COP value can reach 8 ~ 9, reduces power consumption;
6, the heating pipe network backwater adopting this system is less than 2 DEG C, lower than the earth temperature, produces heat loss along Cheng Buhui;
7, because a heating pipe network backwater is less than 2 DEG C, the used heat along a lot of spot distribution of journey can add to come in, and sets up used heat energy recycling network.Be dispersed heat (condenser cooling residual heat) in cooling tower originally lower than the heat up heat that absorbs of heating pipe network backwater of 2 DEG C, this section of heat is free.And this heat transfer process plate type heat exchanger direct heat transfer obtains, do not consume other energy any;
8, native system has reclaimed the heat that originally will lose in cooling tower to greatest extent, greatly reduces the drift ice amount of cooling tower;
9, a conventional heating pipe network supply backwater temperature difference is 40 DEG C, and native system supply backwater temperature difference is 108 DEG C, adds the heat energy of the absorption source pump thermal source in Region Heating Station side, is equivalent to heat supply overall temperature difference and reaches 160 DEG C ~ 180 DEG C.This technology significantly increases confession heat flow and the heat supply temperature difference of user side, improves pipe network transfer efficiency and heat supplying scale, decreases the investment of heating network, great for city energy-saving significance.In urban core region, while thermic load increases fast, Underground Space Resource is used up substantially, and run for the large temperature difference of backwater and avoid brokenly road to construct, this technology will become the unique solution of pipe network dilatation;
10, by the driving heat source of the thermal source (coal, oil, natural gas etc.) of direct for conventional boiler combustion heat supplying as absorption heat pump, by the fire of waste of fuel with making full use of, fuel use amount saves half, and heating efficiency can be enhanced about more than once simultaneously;
11, the extracted steam from turbine part being originally used as heat exchange is used for driving absorption heat pump acting, by the fire of the fuel of waste with and the fire of cooling tower heat of waste without effectively combining, become the effective heat energy being suitable for heating;
12, heating process is a dynamic process.Supplying warm season initial stage and latter stage, heating demand is lower by about 40% than heating peak value, therefore is just needing to reduce heat load for warm season initial stage and latter stage.This technology can by regulating quantity of circulating water or regulating the temperature difference to adapt to the heat load requirement of different times.Regardless of which kind of regulative mode, drawing gas of steam turbine can be reduced, increase generated energy.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of detailed description of the invention one;
Fig. 2 is the schematic diagram of detailed description of the invention two;
Fig. 3 is the schematic diagram of detailed description of the invention three;
In figure: 1. steam turbine, 2. generator, 3. condenser, 4. cooling tower, 5. plate type heat exchanger, 6. steam double-effect absorption heat pump, 7. steam single-effective absorption heat pump, the 8. large temperature difference absorption heat pump of steam, 9. steam water heat exchanger, 10. water-water heat exchanger, 11. first order absorption heat pumps, 12. second level absorption heat pumps, 13. first order compression refrigerating machines, 14. heat reclaim units, 15. third level absorption heat pumps, 16. second level compression refrigerating machines, 17. driving heat source, 18. user sides.
Detailed description of the invention
Detailed description of the invention one:
In Region Heating Station side, steam power plant's 110 DEG C of hot water temperature after water-water heat exchanger 10 with heating secondary pipe network user side 18 heat exchange that pipe network exports that heats is down to 70 DEG C, and user side recirculated water is warming up to 75 DEG C by 50 DEG C;
Be arranged on the first order absorption heat pump 11 of Region Heating Station side, using high-quality heat energy (combustion gas, fuel oil, steam, hot water) as driving heat source 17, using heating pipe network backwater of 70 DEG C as low-temperature heat source, for after user side 18 heat supply of the secondary pipe network that heats, temperature is down to 25 DEG C, user side recirculated water is warming up to 75 DEG C by 50 DEG C;
Be arranged on the second level absorption heat pump 12 of Region Heating Station side, using high-quality heat energy (combustion gas, fuel oil, steam, hot water) as driving heat source 17, the 30 DEG C of hot water provided using the condenser end of first order compression refrigerating machine 13 are as low-temperature heat source, for user side 18 heat supply of the secondary pipe network that heats, user side recirculated water is warming up to 75 DEG C by 50 DEG C;
Be arranged on the first order compression refrigerating machine 13 of Region Heating Station side, using 25 DEG C of heating pipe network backwater of first order absorption heat pump 11 discharge as low-temperature heat source, at the condenser side of first order compression refrigerating machine 13,25 DEG C of water are heated to 30 DEG C, the hot water of 30 DEG C is as the low-temperature heat source of second level absorption heat pump 12, and a heating pipe network return water temperature of discharging from the vaporizer side of first order compression refrigerating machine 13 is down to less than 2 DEG C and is entered heat reclaim unit 14.
Be arranged on the third level absorption heat pump 15 of Region Heating Station side, using high-quality heat energy (combustion gas, fuel oil, steam, hot water etc.) as driving heat source 17, the 30 DEG C of hot water provided using second level compression refrigerating machine 16 condenser side are as low-temperature heat source, for user side 18 heat supply of the secondary pipe network that heats, user side recirculated water is warming up to 75 DEG C by 50 DEG C;
Be arranged on the second level compression refrigerating machine 16 of Region Heating Station side, using a heating pipe network backwater of discharging from heat reclaim unit 14 as low-temperature heat source, in second level compression refrigerating machine 16 condenser end, heat the low-temperature heat source of the hot water after intensification as third level absorption heat pump 15; Be cooled to less than 2 DEG C from heating pipe network backwater of second level compression refrigerating machine 16 vaporizer side discharge and return steam power plant;
In steam power plant side, the weary gas in steam turbine 1 enters into condenser 3, condenser cooling water is heated to 35 DEG C; Heating pipe network backwater of 2 DEG C enters power plant's plate type heat exchanger 5 to carry out heat exchange with condenser cooling water and is warmed up to 30 DEG C, and the condenser cooling water of 35 DEG C is cooled to 20 DEG C and returns in condenser 3; Be arranged on the steam type absorption heat pump 6,7,8 of steam power plant side, do driving heat source with the high-temperature steam that steam turbine is extracted out, using condenser cooling water as low-temperature heat source, heating pipe network backwater is heated to 90 DEG C; Heating pipe network backwater of 90 DEG C enters steam water heat exchanger 9 and is warming up to 110 DEG C with the heat exchange of drawing gas of steam turbine 1 and exports as the pipe network water supply that heats.
Detailed description of the invention two:
In Region Heating Station side, steam power plant's 110 DEG C of hot water temperature after water-water heat exchanger 10-1 with heating secondary pipe network user side 18 heat exchange that pipe network exports that heats is down to 70 DEG C, and user side recirculated water is warming up to 75 DEG C by 50 DEG C;
Heating pipe network backwater temperature after water-water heat exchanger 10-2 with heating secondary pipe network user side 18 heat exchange of 70 DEG C is down to 40 DEG C, and user side recirculated water is warming up to 50 DEG C by 40 DEG C;
Be arranged on the first order absorption heat pump 11 of Region Heating Station side, using high-quality heat energy (combustion gas, fuel oil, steam, hot water) as driving heat source 17, using heating pipe network backwater of 40 DEG C as low-temperature heat source, after giving user side 18 heat supply of heating secondary pipe network, temperature is down to 25 DEG C, and user side recirculated water is warming up to 75 DEG C by 50 DEG C;
Be arranged on the second level absorption heat pump 12 of Region Heating Station side, using high-quality heat energy (combustion gas, fuel oil, steam, hot water) as driving heat source 17, there is provided 30 DEG C of hot water as low-temperature heat source using the condenser end of first order compression refrigerating machine 13, for user side 18 heat supply of the secondary pipe network that heats, user side recirculated water is warming up to 75 DEG C by 50 DEG C;
Be arranged on the first order compression refrigerating machine 13 of Region Heating Station side, using 25 DEG C of heating pipe network backwater of first order absorption heat pump 11 discharge as low-temperature heat source, 25 DEG C of water are heated 30 DEG C by first order compression refrigerating machine 13 condenser end, the hot water of 30 DEG C is as the low-temperature heat source of second level absorption heat pump 12, and a heating pipe network return water temperature of discharging from the vaporizer side of first order compression refrigerating machine 13 is down to less than 2 DEG C and is entered heat reclaim unit 14.
Be arranged on the third level absorption heat pump 15 of Region Heating Station side, using high-quality heat energy (combustion gas, fuel oil, steam, hot water etc.) as driving heat source 17, the 30 DEG C of hot water provided using second level compression refrigerating machine 16 condenser end are as low-temperature heat source, for user side 18 heat supply of the secondary pipe network that heats, user side recirculated water is warming up to 75 DEG C by 50 DEG C;
Be arranged on the second level compression refrigerating machine 16 of Region Heating Station side, using a heating pipe network backwater of discharging from heat reclaim unit 14 as low-temperature heat source, in second level compression refrigerating machine 16 condenser end, heat the low-temperature heat source of the hot water after intensification as third level absorption heat pump 15; Be down to less than 2 DEG C from heating pipe network backwater of second level compression refrigerating machine 16 vaporizer side discharge and return steam power plant;
In steam power plant, the weary gas in steam turbine 1 enters into condenser 3, condenser cooling water is heated to 35 DEG C; Heating pipe network backwater of 2 DEG C enters power plant's plate type heat exchanger 5 to carry out heat exchange with condenser cooling water and is warmed up to 30 DEG C, and the condenser cooling water of 35 DEG C is cooled to 20 DEG C and returns in condenser 3; Be arranged on the steam type absorption heat pump 6,7,8 of steam power plant side, using the high-temperature steam of steam turbine extraction as driving heat source, using condenser cooling water as low-temperature heat source, carry out being heated to 90 DEG C to heating pipe network backwater; Heating pipe network backwater of 90 DEG C enters high-temperature steam heat exchange that steam water heat exchanger 9 and steam turbine 1 extract and is warming up to 110 DEG C of conducts pipe network water supply that heats and exports.
Detailed description of the invention three:
In Region Heating Station side, power plant's 90 DEG C of hot water temperature after water-water heat exchanger 10 with heating secondary pipe network user side 18 heat exchange that pipe network exports that heats is down to 40 DEG C, and user side recirculated water is warming up to 75 DEG C by 50 DEG C;
Be arranged on the first order absorption heat pump 11 of Region Heating Station side, using high-quality heat energy (combustion gas, fuel oil, steam, hot water) as driving heat source 17, using heating pipe network backwater of 40 DEG C as low-temperature heat source, for after user side 18 heat supply of the secondary pipe network that heats, temperature is down to 25 DEG C, user side recirculated water is warming up to 50 DEG C by 40 DEG C;
Be arranged on the second level absorption heat pump 12 of Region Heating Station side, using high-quality heat energy (combustion gas, fuel oil, steam, hot water) as driving heat source 17, the 30 DEG C of hot water provided using the condenser end of first order compression refrigerating machine 13 are as low-temperature heat source, for user side 18 heat supply of the secondary pipe network that heats, user side recirculated water is warming up to 50 DEG C by 40 DEG C;
Be arranged on the first order compression refrigerating machine 13 of Region Heating Station side, using 25 DEG C of heating pipe network backwater of first order absorption heat pump 11 discharge as low-temperature heat source, 25 DEG C of water are heated 30 DEG C by first order compression refrigerating machine 13 condenser end, the hot water of 30 DEG C is as the low-temperature heat source of second level absorption heat pump 12, and a heating pipe network return water temperature of discharging from the vaporizer side of first order compression refrigerating machine 13 is down to less than 2 DEG C and is entered heat reclaim unit 14.
Be arranged on the third level absorption heat pump 15 of Region Heating Station side, using high-quality heat energy (combustion gas, fuel oil, steam, hot water etc.) as driving heat source 17, the 30 DEG C of hot water provided using second level compression refrigerating machine 16 condenser end are as low-temperature heat source, for user side 18 heat supply of the secondary pipe network that heats, user side recirculated water is warming up to 75 DEG C by 50 DEG C;
Be arranged on the second level compression refrigerating machine 16 of Region Heating Station side, using a heating pipe network backwater of discharging from heat reclaim unit 14 as low-temperature heat source, in second level compression refrigerating machine 16 condenser end, heat the low-temperature heat source of the hot water after intensification as third level absorption heat pump 15; Be cooled to less than 2 DEG C from heating pipe network backwater of second level compression refrigerating machine 16 vaporizer side discharge and return steam power plant;
In steam power plant, the weary gas in steam turbine 1 enters into condenser 3, condenser cooling water is heated to 35 DEG C; Heating pipe network backwater of 2 DEG C enters power plant's plate type heat exchanger 5 to carry out heat exchange with condenser cooling water and is warmed up to 30 DEG C, and the condenser cooling water of 35 DEG C is cooled to 20 DEG C and returns in condenser 3; Be arranged on the steam type absorption heat pump 6,7,8 of steam power plant side, using the high-temperature steam of steam turbine extraction as driving heat source, using condenser cooling water as low-temperature heat source, heating pipe network backwater be heated to 90 DEG C and export as heating pipe network water supply.
The present invention is not limited to above-mentioned detailed description of the invention, any the present invention disclose technical scope in equivalent concepts or change, be all classified as protection scope of the present invention.
Claims (3)
1. the energy-saving heating system reducing heat supply return water temperature and reclaim city used heat, comprise steam power plant's extraction for heat supply system, steam-condenser of thermal power plants cooling water system, Region Heating Station heat pump, heating pipe network, heating secondary pipe network, city WHRS, it is characterized in that:
Region Heating Station side is heated after pipe network water supply carries out heat exchange by heat exchanger and heating secondary pipe network, arranges two-stage absorption heat pump and compression refrigerating machine, heating pipe network return water temperature is reduced to less than 2 DEG C in the backhaul of a heating pipe network; The industrial exhaust heat of heat reclaim unit recovery along journey is set again, heating pipe network return water temperature is promoted, and then third level absorption heat pump and compression refrigerating machine are set, heating pipe network return water temperature is reduced to less than 2 DEG C; In this procedures system, the driving heat source of absorption heat pump at different levels is high-quality heat energy, the end that heats of absorption heat pump at different levels heats to the backwater of heating secondary pipe network, the low-temperature heat source of first order absorption heat pump is heating pipe network backwater, the low-temperature heat source of the second level and third level absorption heat pump is provided by the condenser end of compression refrigerating machine, the low-temperature heat source of compression refrigerating machine evaporimeter is heating pipe network backwater, and a heating pipe network backwater of discharging from most end stage compression type evaporator of refrigerator returns steam power plant;
Heat pipe network backwater in steam power plant by heat exchanger and the heat exchange of steam-condenser of thermal power plants cooling water, reclaim steam power plant's waste heat, pass through steam type absorption heat pump again by temperature increase, drawn gas by steam water heat exchanger and steam turbine in thermal power plant afterwards and carry out heat exchange, obtain 110 DEG C of heating pipe network water supply of conventional heat-supplying mode; Wherein in a heating pipe network return water temperature lifting process, the driving heat source of steam type absorption heat pump is the high-temperature steam that steam turbine is extracted out, and low-temperature heat source is steam-condenser of thermal power plants cooling water.
2. the energy-saving heating system of reduction heat supply return water temperature according to claim 1 and recovery city used heat, it is characterized in that: it comprises steam power plant side at least one-level steam type absorption heat pump, three grades, Region Heating Station side absorption heat pump and two stages of compression formula refrigeration machine;
Be arranged on the steam type absorption heat pump of steam power plant side, using the high-temperature steam of steam turbine extraction as driving heat source, with condenser cooling water as low-temperature heat source, heat to heating pipe network backwater;
Being arranged on the first order absorption heat pump of Region Heating Station side, using high-quality heat energy as driving heat source, using the pipe network backwater that heats as low-temperature heat source, is the user side heat supply of the secondary pipe network that heats;
Being arranged on the second level absorption heat pump of Region Heating Station side, using high-quality heat energy as driving heat source, using the hot water of first order compression refrigerating machine condenser side as low-temperature heat source, is the user side heat supply of the secondary pipe network that heats;
Be arranged on the first order compression refrigerating machine of Region Heating Station side, using a heating pipe network backwater of discharging from first order absorption heat pump vaporizer side as low-temperature heat source, the hot water that first order compression refrigerating machine condenser side heats up is as the low-temperature heat source of second level absorption heat pump; A heating pipe network backwater of discharging from first order compression refrigerating machine vaporizer side enters heat reclaim unit;
Being arranged on the third level absorption heat pump of Region Heating Station side, using high-quality heat energy as driving heat source, using the hot water of second level compression refrigerating machine condenser side as low-temperature heat source, is the user side heat supply of the secondary pipe network that heats;
Be arranged on the second level compression refrigerating machine of Region Heating Station side, using a heating pipe network backwater of discharging from heat reclaim unit as low-temperature heat source, the hot water that second level compression refrigerating machine condenser side heats up is as the low-temperature heat source of third level absorption heat pump; A heating pipe network backwater of discharging from second level compression refrigerating machine vaporizer side returns steam power plant.
3. the energy-saving heating system of reduction heat supply return water temperature according to claim 2 and recovery city used heat, is characterized in that:
Be arranged on the steam type absorption heat pump of steam power plant side, using the high-temperature steam of steam turbine extraction as driving heat source, with condenser cooling water as low-temperature heat source, carry out being heated to 90 DEG C to heating pipe network backwater;
Being arranged on the first order absorption heat pump of Region Heating Station side, using high-quality heat energy as driving heat source, using heating pipe network backwater of 70 DEG C as low-temperature heat source, is the user side heat supply of the secondary pipe network that heats;
Second level absorption heat pump, using high-quality heat energy as driving heat source, using first order compression refrigerating machine condenser side 30 DEG C of hot water as low-temperature heat source, is the user side heat supply of the secondary pipe network that heats;
Be arranged on the first order compression refrigerating machine of Region Heating Station side, using a heating pipe network backwater of discharging from first order absorption heat pump vaporizer side as low-temperature heat source, condenser side 25 DEG C of water are heated to 30 DEG C, and the hot water of 30 DEG C is as the low-temperature heat source of second level absorption heat pump; That discharges from first order compression refrigerating machine vaporizer side enters heat reclaim unit lower than heating pipe network backwater of 2 DEG C, carries out heat exchange intensification by city used heat such as heat reclaim unit and the industrial exhaust heats along journey;
Being arranged on the third level absorption heat pump of Region Heating Station side, using high-quality heat energy as driving heat source, using the hot water of second level compression refrigerating machine condenser side as low-temperature heat source, is the user side heat supply of the secondary pipe network that heats;
Be arranged on the second level compression refrigerating machine of Region Heating Station side, using a heating pipe network backwater of discharging from heat reclaim unit as low-temperature heat source, using the backwater of third level absorption heat pump vaporizer side as high temperature heat source; Be cooled to less than 2 DEG C from heating pipe network backwater of second level compression refrigerating machine vaporizer side discharge and return steam power plant.
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2014
- 2014-09-23 CN CN201420546642.7U patent/CN204301176U/en not_active Expired - Fee Related
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