CN105222335A - Recovered flue gas heat-pump apparatus - Google Patents
Recovered flue gas heat-pump apparatus Download PDFInfo
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- CN105222335A CN105222335A CN201410272989.1A CN201410272989A CN105222335A CN 105222335 A CN105222335 A CN 105222335A CN 201410272989 A CN201410272989 A CN 201410272989A CN 105222335 A CN105222335 A CN 105222335A
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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
- 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]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
Abstract
A kind of recovered flue gas heat-pump apparatus, comprises air source hot pump water heater body, the evaporimeter be arranged in air source heat pump, air-water heat exchanger, hybrid cooling device, water-water heat exchanger and the first water tank.This recovered flue gas heat-pump apparatus can utilize boiler exhaust gas gas waste heat, makes again the working environment of heat pump improve, and makes source heat pump no longer be subject to the restriction of the problem of frosting and poor efficiency in the application of cold district, effectively reduces the heating cost of hot water.High temperature hot gas is converted to low temperature, provides heating the condensed water reclaimed, water resource heat pump conversion high-temperature-hot-water 60 DEG C.
Description
Technical field
The present invention relates to heat pump hot gas and reclaim field, specifically a kind of recovered flue gas heat-pump apparatus.
Background technology
For reducing boiler smoke to the pollution of urban atmosphere, many cities restriction coal-burning boiler, the gas fired-boiler that to greatly develop with clean natural gas be fuel.The exhaust gas temperature (steam boiler is more than 140 DEG C) more than 90 DEG C of current gas-fired water heating boiler, particularly the heating season in the north, has a large amount of heat energy to be exhausted into air, not only wastes the energy, also discharged a large amount of CO
2, the pernicious gas such as NO, exacerbate atmosphere pollution.Existing mature technology adopts air-water heat exchanger by after waste heat recovery, and its exhaust gas temperature is still at about 80 DEG C.The hot water facility that air-cooled heat pump hot gas source is current energy-saving and environmental protection, Energy Efficiency Ratio is high, technology maturation, promotes the use of rapidly at the southern area air-cooled heat pump hot gas source of China.But the problem making the Energy Efficiency Ratio of the evaporimeter frosting of equipment and equipment reduce due to winter low temperature in the north constrains this technology in the universal of northern area and development.
Summary of the invention
The object of this invention is to provide a kind of recovered flue gas heat-pump apparatus, boiler exhaust gas gas waste heat can be utilized, make again the working environment of heat pump improve, make source heat pump no longer be subject to the restriction of the problem of frosting and poor efficiency in the application of cold district, effectively reduce the heating cost of hot water.High temperature hot gas is converted to low temperature, provides heating the condensed water reclaimed, water resource heat pump conversion high-temperature-hot-water 60 DEG C.
Object of the present invention is achieved through the following technical solutions.
The invention provides a kind of recovered flue gas heat-pump apparatus, comprise air source hot pump water heater body, be arranged on the evaporimeter in air source heat pump, air-water heat exchanger, hybrid cooling device, water-water heat exchanger and the first water tank, the first flue is connected with between air-water heat exchanger and the exhaust gases passes of gas fired-boiler, the second flue is connected with between air-water heat exchanger and hybrid cooling device, the 3rd flue is connected with between hybrid cooling device and evaporimeter, the outlet pipe of evaporimeter is provided with muffler be connected with hybrid cooling device, circulating water pipe is connected with between first water tank and air-water heat exchanger, circulating water pipe is provided with circulating pump, air-water heat exchanger, hybrid cooling device and Teat pump boiler body are connected to condensate pipe, each condensate pipe is connected with water-water heat exchanger, water-water heat exchanger is connected with the water pipe of the source water (running water from the first water tank) that will heat, first water tank is connected with air source hot pump water heater body by water inlet pipe, inlet pipeline is provided with water pump, outlet pipe is connected with between air source hot pump water heater body and water tank.Described air-water heat exchanger is the heat exchanger carrying out heat exchange for gas and water, and described water-water heat exchanger is the temperature difference utilized between water, carries out the heat exchanger of the heat exchange of water and water.The water spray equipment that hybrid cooling device comprises a chamber and arranges in this chamber, by spraying water smoke and flue gas reduce flue-gas temperature at hybrid cooling device chamber indoor exposures.
Preferably, the import of the first flue is double feed inlet structure.In addition, preferably, in the 3rd flue, be provided with nertralizer dispenser, in and condensed water in acid.
On said system basis, after recovery heat pump completes, the second level establishes a set of water resource heat pump, water tank, air-cooled heat pump and solar energy to form second level warming room refrigeration system.Namely, first water tank is connected with the second water tank with outlet pipe by water inlet pipe (water inlet pipe is provided with water pump), second water tank is connected with water resource heat pump with outlet pipe (outlet pipe is provided with water pump) by water inlet pipe, and water resource heat pump is connected with three-tank with outlet pipe (outlet pipe is provided with water pump) by water inlet pipe.
One-level reclaims hot water, is recycled to and stores by water resource heat pump in water tank, promote high temperature heating.The temperature cycles of solar energy provides water resource heat pump low-temperature-rise high temperature in storage water tank, water resource heat pump was circulated by water tank and cooling device and provided refrigeration summer, solar energy mixes with air-conditioning source heat pump not by weather effect output 60 tons of hot water costs every day 3 yuan/ton summer, and water source and air-cooled heat pump combine and can be used for indoor refrigeration.
The present invention compared with prior art has the following advantages:
(1) in view of needing heat at the flue gas heat extraction of heating season gas fired-boiler and air-conditioning air supply heat pump water heater, consistent in time, energy is complementary, therefore the key character of this technology is exactly that the low-temperature flue gas heat extraction of gas fired-boiler and air source hot pump water heater needed thermal, the thermal energy of the smoke evacuation of gas fired-boiler is made to be the thermal source of air source water heater, creating to air source hot pump water heater can the environment of Effec-tive Function, solve the difficult problem that air source hot pump water heater runs in the winter time, also a large amount of condensed waters has been reclaimed while reduction heats cost, reduce the pernicious gas that gas fired-boiler discharges in air, realize energy-conservation, reduce discharging, the environmental benefit social benefit of water saving.
(2) according to the climatic characteristic in the north, the temperature in season in spring and summer autumn three is all applicable to the operation of air source hot pump water heater, only has during winter low temperature and is affected.After adopting this technology, by the flue gas of the gas fired-boiler of warming through cooling and dewatering process, reuse does thermal source to air source hot pump water heater, can produce the effect of achieving many things at one stroke.Analyze from the whole year, the Effec-tive Function of heating boiler smoke evacuation and heat pump is complementary on space-time, namely time temperature higher (>=14 DEG C), heat pump working environment is better, work in efficient district, COP value can reach 4-6 in summer, spring and autumn can reach 3-5, and when winter temperature declines, the deterioration of operation of heat pump environment even can not run, but heating boiler brings into operation, boiler exhaust gas gas waste heat can utilize, make again the working environment of heat pump improve, and temperature is lower, boiler load is larger, discharge fume afterheat more, the convertible heat energy of heat pump is more.Can adjust according to the needs of heat pump for flue-gas temperature, heat pump can obtain the environment temperature not worse than spring and summer autumn and service condition, COP value can reach 4-6, in this meaning view, all have the condition of gas-fired equipment flue gas waste heat-recovering under, air source heat pump no longer by the restriction of the problem of frosting and poor efficiency, changes high energy saving research equipment by recuperation of heat in the application of cold district, with single supplying hot water, be converted to the mixing of spring and summer refrigeration by the most energy-saving equipment of seasonality.
Accompanying drawing explanation
Fig. 1 is flue gas heat-pump apparatus functional-block diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, recovered flue gas heat-pump apparatus of the present invention is described in further detail.
As shown in Figure 1, recovered flue gas heat-pump apparatus of the present invention comprises air source hot pump water heater body 1, evaporimeter 2, air-water heat exchanger 5, hybrid cooling device 6, water-water heat exchanger 10 and the first water tank 3, the first flue 11 is connected with between the exhaust gases passes of air-water heat exchanger 5 and gas fired-boiler 4, the second flue 21 is connected with between air-water heat exchanger 5 and hybrid cooling device 6, the 3rd flue 22 is connected with between hybrid cooling device 6 and evaporimeter 2, the outlet pipe of evaporimeter 2 is provided with muffler 12 be connected with hybrid cooling device 6, circulating water pipe is connected with between first water tank 3 and air-water heat exchanger 5, circulating water pipe is provided with circulating pump 8, air-water heat exchanger 5, hybrid cooling device 6 and Teat pump boiler body 1 are connected to condensate pipe, each condensate pipe is connected with water-water heat exchanger 10, water-water heat exchanger 10 is connected with the water pipe of the source water (running water from the first water tank 3) that will heat, first water tank 3 is connected with air source hot pump water heater body 1 by water inlet pipe, inlet pipeline is provided with water pump 9, outlet pipe is connected with between air source hot pump water heater body 1 and the first water tank 3.
Preferably, the import of the first flue is double feed inlet structure.In addition, preferably, in the 3rd flue, be provided with nertralizer dispenser 7, in and condensed water in acid.
Preferably, first water tank 3 is connected with the second water tank 13 with outlet pipe by water inlet pipe (water inlet pipe is provided with water pump 17), second water tank 13 is connected with water resource heat pump 15 with outlet pipe (outlet pipe is provided with water pump 16) by water inlet pipe, and water resource heat pump 15 is connected with three-tank 14 with outlet pipe (outlet pipe is provided with water pump 18) by water inlet pipe.
The flue gas (temperature is at 160 ~ 230 DEG C) come from chimney enters air-water heat exchanger 5, the water circulated with water tank 1 carries out heat exchange, the water storage (running water) of water tank 1 is heated (can reach 30 DEG C), then send back in water tank 1, by air-water heat exchanger 5, flue-gas temperature is lowered to 75 ~ 85 DEG C, usual about 80 DEG C, enter hybrid cooling device 6 (the water spray equipment that hybrid cooling device comprises a chamber and arranges in this chamber, by spraying water smoke and flue gas reduce flue-gas temperature at hybrid cooling device chamber indoor exposures) in, flue gas is at air-water heat exchanger 5, the condensed water that in hybrid cooling device 6, condensation is got off is incorporated in condensate pipe, in water-water heat exchanger 10 with carry out heat exchange from the running water in water tank 1 and (water from water tank 1 can be elevated to 35 ~ 45 DEG C from about 20 DEG C, usual 40 DEG C), from air-water heat exchanger 5 flue gas out hybrid cooling device 6 with running water plume contact, flue-gas temperature drops to 35 ~ 40 DEG C, preferably about 38 DEG C, then enter in air source heat pump 1 by the 3rd gas flue, in air source heat pump 1, enter air source heat pump fin thermal energy exchange compress through compressor, condensation, throttling, the thermodynamic cycle of evaporation, then the muffler part by the outlet pipe on the evaporimeter of air source heat pump 1 is arranged returns hybrid cooling device, a part by discharge of pipes in air, the water had in air source heat pump from flue gas under condensation enters condensate pipe, heat exchange is carried out with the water in water tank 3 in water-water heat exchanger 10, about 40 DEG C can be heated to from the water in water tank 3 from about 20 DEG C after exchanging like this, then the water of water tank 3 supply feed-tank 13, be supplied to water resource heat pump 15 condenser by water tank 13 to circulate and carry out conversion and be heated to 55-70 DEG C of hot water, heating is used further to for feed-tank 14, water tank 14 is provided with water inlet (entering cold water), for supplying feed-tank 14 source water.Running water is entered in water tank 14 upper end, and side goes out 55-60 DEG C of hot water.
Simultaneously, at night, utilize air source heat pump 1 that the water from the first water tank 3 is heated to 40 ~ 45 DEG C from 15 ~ 20 DEG C, because the operating load peak of winter heating boiler is generally at night, therefore air source hot pump water heater also can run at night and enjoy the policy of paddy electricity, another reduces water producing cost, also can play the effect of peak load regulation network simultaneously.If calculated according to Beijing trough-electricity 0.3 yuan/degree, heat one ton of water power consumption, 4 degree of its costs in this link and only have 1.2 yuan.
The air-water heat exchanger 5 that the hot water being heated to about 40-45 DEG C is transported to high-temperature flue gas reuse part is again heated to about 60 DEG C further, can be used for heating, because flue-gas temperature 120 DEG C (steam oven is 150 DEG C) is with comparatively large by the temperature difference of water that heats, so heat exchange efficiency is also very high.This link does not have operating cost (power of circulating pump is lower to be ignored) yet.
Advantage of the present invention:
After adopting technology of the present invention, the heating cost of hot water can be reduced by three links:
1. to discharge the condensed water of large amount temperature more than 40 DEG C in the process that flue gas is lowered the temperature at heat exchanger, first by water-water heat exchanger by source water heating (such as can be heated to 22 DEG C from 15 DEG C) to be heated, this link does not produce operating cost.
2. source water to be heated is heated to 42 DEG C through air source heat pump from 18 DEG C, and according to the characteristic curve of air source hot pump water heater, when the temperature difference of Inlet and outlet water is less than 20 DEG C, its COP value is the highest.Therefore, this link will allow air source water heater work in efficient district, and its COP can reach 5-6, and water heating temperature rise 20 DEG C of need per ton 4 DEG C of electricity, cost is about 400 yuan.Because the operating load peak of winter heating boiler is generally at night, therefore air source hot pump water heater also can run at night and enjoy the policy of paddy electricity, and another reduces water producing cost, also can play the effect of peak load regulation network simultaneously.If calculated according to Beijing trough-electricity 0.3 yuan/degree, heat one ton of water power consumption, 4 degree of its costs in this link and only have 1.2 yuan.
3. the hot water being heated to 40 DEG C is heated to 60 DEG C because flue-gas temperature 120 DEG C (steam oven is 150 DEG C) is with comparatively large by the temperature difference of water that heats, so heat exchange efficiency is also very high further through the air-water heat exchanger of high-temperature flue gas reuse part again.This link does not have operating cost (power of circulating pump is lower to be ignored) yet.
4. because the High Efficiency Thermal by above-mentioned three links exchanges, combustion of natural gas fume afterheat (can be comprised sensible heat and latent heat, wherein latent heat accounts for more than 10% of Lowlevel thermal energy) be all used, if be benchmark according to low heat valve, the integrated heat efficiency that gas fired-boiler can be made to add this technology reaches more than 110%, produces well energy-conservation effect.
In the composition of natural gas, the overwhelming majority is hydrocarbon, produce a large amount of water after burning and gasification for steam (accounting for 20% of flue gas total measurement (volume)) with fume emission in air.The steam of 1.55 kilograms can be produced after each cubic metre of natural gas burning.Steam in the flue gas of exhaust temperature more than 120 DEG C is in superheat state.Because the condensation temperature of steam is at about 58 DEG C, flue gas is dropped to 70-90 DEG C by existing off-gas recovery technology, also can only reclaim small part condensed water.Due to the application of this technology, the flue gas of gas fired-boiler utilizes through three coolings, by near for final exhaust temperature close to outside air temperature, then while reuse heat energy, reclaims condensed water to greatest extent.With one 4 tons gas and hot water heating furnace gauges, run 20 hours every day, consumption gas 320M per hour
з, need burn every day 6400M
зnatural gas.Condensed water 10 tons/day can be reclaimed in the flue gas of its discharge.2008 Beijing city consumes natural gas 5,200,000,000 M altogether
зif by its flue gas condensing Water Sproading of 50%, 5,000,000 tons of water can be reached, the water yield of a suitable small reservoir.
Owing to producing a large amount of condensed waters in three temperature-fall periods, the most of CO in flue gas
2, NO
xcan be dissolved in condensed water Deng pernicious gas makes it be faintly acid.Which reduces the pernicious gas that gas fired-boiler discharges in air, produce certain bad border benefit, contributing for purifying Pekinese's air in the winter time further.
It is below the analysis of techno-economic benefits;
The cost compare (one ton of water is heated to 55 DEG C from 15 DEG C, and temperature rise is 40 DEG C) of present situation hot water
Be six four tons of gas-fired water heating boilers for heating boiler, wherein five winter operations heating, a whole year operation specializes in domestic hot-water.Present situation domestic water is every day 40 tons.According to reality measuring and calculating, because water consumption is less, boiler operatiopn management cost is very high, and the cost of current water heating per ton is 33.80 yuan.As adopted heat pump scheme, the heating cost adopting heat pump in season in spring and summer autumn three is 6579 yuan.Adopt off-gas recovery and heat pump united winter, recycling low ebb electricity price, water heating cost per ton can reduce further.Annual hot water heating cost average out to 5 yuan.Than heating minimizing 28 yuan with gas fired-boiler at present, economic benefit is obviously.
Investment estimate: according to measuring and calculating, air source hot pump water heater investment is 1.5 ten thousand yuan/ton of water/days, needs 600,000 yuan, and water-saving heat exchanging device, hybrid cooling device, 50 tons of water tanks etc. need 350,000 yuan, amounts to investment 950,000 yuan.According to 40 tons of saving per ton 28 yuan of supplying water day, annual operation 330 days, can save 450,000 yuan, recoverable investment in 2 years altogether.
Claims (4)
1. a recovered flue gas heat-pump apparatus, comprise air source hot pump water heater body, be arranged on the evaporimeter in air source heat pump, air-water heat exchanger, hybrid cooling device, water-water heat exchanger and the first water tank, the first flue is connected with between air-water heat exchanger and the exhaust gases passes of gas fired-boiler, the second flue is connected with between air-water heat exchanger and hybrid cooling device, the 3rd flue is connected with between hybrid cooling device and evaporimeter, the outlet pipe of evaporimeter is provided with muffler be connected with hybrid cooling device, circulating water pipe is connected with between first water tank and air-water heat exchanger, circulating water pipe is provided with circulating pump, air-water heat exchanger, hybrid cooling device and Teat pump boiler body are connected to condensate pipe, each condensate pipe is connected with water-water heat exchanger, water-water heat exchanger is connected with the water pipe of the source water that will heat, first water tank is connected with air source hot pump water heater body by water inlet pipe, inlet pipeline is provided with water pump, outlet pipe is connected with between air source hot pump water heater body and water tank.
2. recovered flue gas heat-pump apparatus according to claim 1, is characterized in that, the import of the first flue is double feed inlet structure.
3. recovered flue gas heat-pump apparatus according to claim 1, is characterized in that, in the 3rd flue, be provided with nertralizer dispenser.
4. recovered flue gas heat-pump apparatus according to claim 1, it is characterized in that, first water tank is connected with the second water tank with outlet pipe further by water inlet pipe, second water tank is connected with water resource heat pump with outlet pipe by water inlet pipe, water resource heat pump is connected with three-tank with outlet pipe by water inlet pipe, and three-tank is provided with heating installation feed water inlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410272989.1A CN105222335A (en) | 2014-06-18 | 2014-06-18 | Recovered flue gas heat-pump apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410272989.1A CN105222335A (en) | 2014-06-18 | 2014-06-18 | Recovered flue gas heat-pump apparatus |
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| CN105222335A true CN105222335A (en) | 2016-01-06 |
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| CN201410272989.1A Pending CN105222335A (en) | 2014-06-18 | 2014-06-18 | Recovered flue gas heat-pump apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425746A (en) * | 2019-07-31 | 2019-11-08 | 广东志高暖通设备股份有限公司 | A kind of module water dispenser and boiler composite hot water system and its control method |
| CN111397209A (en) * | 2020-04-21 | 2020-07-10 | 儒竞艾默生环境优化技术（上海）有限公司 | Cascade heating system and method |
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| CN110425746A (en) * | 2019-07-31 | 2019-11-08 | 广东志高暖通设备股份有限公司 | A kind of module water dispenser and boiler composite hot water system and its control method |
| CN111397209A (en) * | 2020-04-21 | 2020-07-10 | 儒竞艾默生环境优化技术（上海）有限公司 | Cascade heating system and method |
| CN111397209B (en) * | 2020-04-21 | 2021-04-02 | 儒竞艾默生环境优化技术（上海）有限公司 | Cascade heating system and method |
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