WO2017190505A1 - Heat pump-reinforced salt-concentration-differential power generation device using vapour differential pressure energy method under positive temperature difference - Google Patents

Heat pump-reinforced salt-concentration-differential power generation device using vapour differential pressure energy method under positive temperature difference Download PDF

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WO2017190505A1
WO2017190505A1 PCT/CN2016/109365 CN2016109365W WO2017190505A1 WO 2017190505 A1 WO2017190505 A1 WO 2017190505A1 CN 2016109365 W CN2016109365 W CN 2016109365W WO 2017190505 A1 WO2017190505 A1 WO 2017190505A1
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solution
power generation
heat pump
concentrated solution
differential
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PCT/CN2016/109365
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French (fr)
Chinese (zh)
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王焕光
闫文杰
辛毅
吴迪
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中国矿业大学
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03GSPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/04Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03GSPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/005Electro-chemical actuators; Actuators having a material for absorbing or desorbing gas, e.g. a metalhydride; Actuators using the difference in osmotic pressure between fluids; Actuators with elements stretchable when contacted with liquid rich in ions, with UV light, with a salt solution
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03GSPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G2007/007Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using heat pumps
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/30Energy from the sea, e.g. using wave energy or salinity gradient

Abstract

Disclosed is a heat pump-reinforced salt-concentration-differential power generation device using a vapour differential pressure energy method under a positive temperature difference. The power generation device comprises a heat pump heating and circulating device and a salt-concentration-differential power generation device using the vapour differential pressure energy method. The heat pump heating and circulating device comprises a condenser (7), a heat pump pipeline (9), a throttle valve (10), an evaporator (12) and a compressor (22). The salt-concentration-differential power generation device using the vapour differential pressure energy method comprises a low-pressure container (11), a high-pressure container (8), an expander (23), a differential pressure gauge (24) and an expander pipeline (11). By the heat pump heating and circulating, heat is absorbed from a concentrated solution so as to lower the temperature of the concentrated solution, the heat is released to a dilute solution so as to increase the temperature of the dilute solution, so that the inverse temperature difference generated by heat absorption through evaporation of water from the dilute solution and heat release through condensation of vapour in the concentrated solution is effectively offset. The positive temperature difference is maintained and enlarged, a positive saturated vapour differential pressure is in turn maintained and enlarged, thereby facilitating the expander (23) to do work. The energy utilization efficiency is high, the loss is small, the cost is cheap, the applicability is good, and the machining is simple and convenient.

Description

一种热泵强化的正温差下蒸汽压差能法盐差发电装置Steam pressure difference energy salt differential power generation device under positive temperature difference enhanced by heat pump 技术领域Technical field
本发明涉及盐差发电领域,具体涉及一种热泵强化的正温差下蒸汽压差能法盐差发电装置。The invention relates to the field of salt difference power generation, and particularly relates to a steam pressure difference energy salt difference power generation device under positive temperature difference of heat pump strengthening.
背景技术Background technique
随着社会的进步和世界经济的迅速发展,人们对能源的需求与日俱增,就目前世界能源的发展状况来看,化石能源在未来的很长一段时间仍旧会占据着主要的位置,但是化石能源作为一种不可再生能源也面临着枯竭、环境污染等一系列的问题,这迫切的需要我们寻找新的能源来代替化石能源。海洋是取之不尽用之不竭的宝库,其中蕴藏着丰富的海洋能资源,海洋能资源通常是指海洋中所蕴藏的可再生自然能源,而海水盐差能就是其中最主要的一种。盐差能是海水和淡水之间或两种含盐浓度不同的海水之间的化学电位差能,主要存在于河海交接处,具有清洁、可再生、储量巨大等特点。另外,淡水丰富地区的盐湖和地下盐矿也可以利用盐差能。盐差能是海洋能中能量密度最大的一种可再生能源,通常海水(3.5%盐度)与河水之间的化学电位差相当于240m高的水位落差。而且海洋中盐差能资源丰富,据估算,地球上存在着2.6TW可利用的盐差能,其能量甚至比温差能还要大。而在我国,据统计,沿海江河每年的入海径流量约为1.7×1012-1.8×1012m3,其中主要江河的年入海径流量约为1.5×1012-1.6×1012m3,沿海盐差能资源蕴藏量约为3.9×1018J,理论功率约为1.25×1011W。其中长江口及以南的大江河口沿海的资源量占全国总量的92.5%,理论功率估计为0.86×1011KW。特别是长江入海口的流量2.2×104m3/s,可以发电5.2×1010W。另外,我国青海省等地也有不少内陆盐湖可以利用。With the advancement of society and the rapid development of the world economy, people's demand for energy is increasing day by day. As far as the current development of the world's energy is concerned, fossil energy will still occupy a major position for a long time in the future, but fossil energy as a A non-renewable energy source also faces a series of problems such as depletion and environmental pollution. This urgently requires us to find new energy sources to replace fossil energy. The ocean is an inexhaustible treasure house, which contains abundant marine energy resources. The ocean energy resources usually refer to the renewable natural energy contained in the ocean, and the salt water difference is the most important one. . The salt difference energy is the chemical potential difference energy between seawater and fresh water or between two seawaters with different salt concentrations. It mainly exists at the junction of rivers and seas, and has the characteristics of clean, renewable and huge reserves. In addition, salt lakes and underground salt mines in freshwater-rich areas can also use salt energy. Salt difference energy is the most energy-renewable energy source in ocean energy. Usually, the chemical potential difference between seawater (3.5% salinity) and river water is equivalent to the water level drop of 240m. Moreover, the salt in the ocean is rich in energy resources. It is estimated that there is a salt energy difference of 2.6 TW available on the earth, and its energy is even larger than the temperature difference. In China, according to statistics, the annual runoff of coastal rivers is about 1.7×10 12 -1.8×10 12 m 3 , and the annual runoff of the main rivers is about 1.5×10 12 -1.6×10 12 m 3 . The coastal salt energy resource reserves are about 3.9×10 18 J, and the theoretical power is about 1.25×10 11 W. Among them, the resources along the Yangtze River estuary and the south of the Dajiang River estuary account for 92.5% of the national total, and the theoretical power is estimated to be 0.86 × 10 11 KW. In particular, the flow rate of the Yangtze River estuary is 2.2 × 10 4 m 3 /s, which can generate 5.2 × 10 10 W. In addition, many inland salt lakes are available in Qinghai Province and other places in China.
当前,盐差发电的形式主要有:压力延迟渗透法、反电渗析法、蒸汽压差法、电化学电容法等。其中,研究最多的是压力延迟渗透法和反电渗析法,而蒸汽压差能法的原理是:利用不同浓度盐溶液之间的蒸汽压差驱动透平发电。该方法最大的优点是避开了对渗透膜的依赖,但是由于温度低,蒸发量少,压差太小,常温下浓度为3.45%的海水与淡水之间的蒸汽压差仅为10-20mmHg,因此,透平直径需要做的非常大,以保证足够的发电功率,而且稀溶液一侧上表面由于水分的 蒸发会使该侧温度逐渐降低,而当水分到达浓溶液一侧上表面时,由于冷凝放热,温度上升,逐渐形成逆向温差,阻碍正向压差作用,若浓溶液因水蒸汽凝结而产生0.5℃的温升,则该压差将被抵消,所以蒸汽压差能法盐差发电利用起来困难重重。At present, the forms of salt difference power generation mainly include: pressure delay infiltration method, reverse electrodialysis method, vapor pressure difference method, electrochemical capacitance method and the like. Among them, the most studied are the pressure delay infiltration method and the reverse electrodialysis method, and the principle of the vapor pressure difference energy method is to drive the turbine to generate electricity by using the vapor pressure difference between different concentration salt solutions. The biggest advantage of this method is that it avoids the dependence on the permeable membrane, but because of the low temperature, the evaporation is small, the pressure difference is too small, and the vapor pressure difference between seawater and fresh water with a concentration of 3.45% at normal temperature is only 10-20mmHg. Therefore, the turbine diameter needs to be made very large to ensure sufficient power generation, and the upper surface of the dilute solution is due to moisture. Evaporation will gradually lower the temperature on the side, and when the moisture reaches the upper surface of the concentrated solution, the temperature rises due to condensation and exothermic heat, and a reverse temperature difference is gradually formed, which hinders the forward pressure difference, and if the concentrated solution is condensed by water vapor, When the temperature rise of 0.5 °C, the pressure difference will be offset, so the steam pressure difference method salt difference power generation is difficult to use.
发明内容Summary of the invention
技术问题:本发明的目的是为了解决现有技术中的不足,提供一种消除了逆向温差、提高了正向温差、使压差增大、膨胀机做功增多、能量利用效率高、损耗小、成本低廉、加工简单方便的热泵强化的正温差下蒸汽压差能法盐差发电装置。Technical Problem: The object of the present invention is to solve the deficiencies in the prior art, and to provide a method of eliminating a reverse temperature difference, increasing a positive temperature difference, increasing a pressure difference, increasing an expander's work, high energy utilization efficiency, and low loss. The low-cost, simple and convenient heat pump-enhanced positive temperature difference steam differential pressure energy salt differential power generation device.
技术方案:本发明的热泵强化的正温差下蒸汽压差能法盐差发电装置,包括热泵加热循环装置和蒸汽压差能法盐差发电装置;Technical Solution: The steam differential pressure energy salt difference power generation device under the positive temperature difference of the heat pump of the present invention comprises a heat pump heating cycle device and a vapor pressure difference energy salt difference power generation device;
所述热泵加热循环装置包括冷凝器、热泵管道、节流阀、蒸发器、压缩机,所述冷凝器、节流阀、蒸发器、压缩机通过所述热泵管道依次连接并形成循环装置;The heat pump heating circulation device includes a condenser, a heat pump pipe, a throttle valve, an evaporator, a compressor, and the condenser, the throttle valve, the evaporator, and the compressor are sequentially connected through the heat pump pipe and form a circulation device;
所述蒸汽压差能法盐差发电装置包括低压容器、高压容器、膨胀机、差压计、膨胀机管道;所述低压容器与所述高压容器通过所述膨胀机管道相连,所述膨胀机设置在所述膨胀机管道中,所述压差计设置在所述膨胀机出口和入口之间;The vapor pressure difference energy salt difference power generation device comprises a low pressure vessel, a high pressure vessel, an expander, a differential pressure gauge, an expander pipeline; the low pressure vessel and the high pressure vessel are connected through the expander pipeline, the expander Provided in the expander duct, the differential pressure gauge is disposed between the expander outlet and the inlet;
所述蒸发器设置在所述低压容器内,所述低压容器内装有浓溶液;所述冷凝器设置在所述高压容器内,所述高压容器内装有稀溶液;The evaporator is disposed in the low pressure vessel, the low pressure vessel is filled with a concentrated solution; the condenser is disposed in the high pressure vessel, and the high pressure vessel is filled with a dilute solution;
所述浓溶液为饱和溴化锂或者饱和氯化钠溶液;所述稀溶液为浓度低于10%的溶液。The concentrated solution is a saturated lithium bromide or a saturated sodium chloride solution; the diluted solution is a solution having a concentration of less than 10%.
优选的,所述蒸汽压差能法盐差发电装置还包括稀溶液容器、稀溶液补充液、稀溶液泵、稀溶液泵管道、浓溶液容器、浓溶液补充液、浓溶液泵、浓溶液泵管道;Preferably, the vapor pressure difference energy salt difference power generation device further comprises a dilute solution container, a dilute solution replenishing solution, a dilute solution pump, a dilute solution pump pipe, a concentrated solution container, a concentrated solution replenishing solution, a concentrated solution pump, a concentrated solution pump. pipeline;
所述稀溶液容器内放置所述稀溶液补充液,所述稀溶液容器通过所述稀溶液泵管道与所述高压容器相连,所述稀溶液泵管道上设置所述稀溶液泵;Disposing the dilute solution replenishing liquid in the dilute solution container, the dilute solution container is connected to the high-pressure container through the dilute solution pump pipeline, and the dilute solution pump is disposed on the dilute solution pump pipeline;
所述浓溶液容器内放置所述浓溶液补充液,所述浓溶液容器通过所述浓溶液泵管道与所述低压容器相连,所述浓溶液泵管道上设置所述浓溶液泵。 The concentrated solution replenishing liquid is placed in the concentrated solution container, and the concentrated solution container is connected to the low pressure container through the concentrated solution pump pipe, and the concentrated solution pump is disposed on the concentrated solution pump pipe.
优选的,所述蒸汽压差能法盐差发电装置还包括真空泵,所述真空泵通过真空泵管道与所述低压容器相连。Preferably, the vapor differential energy salt differential power generating device further comprises a vacuum pump connected to the low pressure vessel through a vacuum pump pipe.
优选的,所述低压容器的底部设有排液管道,所述排液管道上设有阀门。Preferably, the bottom of the low-pressure vessel is provided with a drain pipe, and the drain pipe is provided with a valve.
优选的,所述冷凝器与蒸发器连接的热泵管道上设置有节流阀。Preferably, the heat pump pipe connected to the evaporator and the evaporator is provided with a throttle valve.
有益效果:本发明的热泵强化的正温差下蒸汽压差能法盐差发电装置,通过热泵加热循环,在浓溶液中吸热使得浓溶液温度降低,在稀溶液中放热使得稀溶液温度升高,有效的抵消了水在稀溶液中蒸发吸热、水蒸气在浓溶液中冷凝放热产生的逆温差,维持并扩大正温差,进而维持并扩大正的饱和蒸汽压差,对膨胀机做功有促进作用;能量利用效率高,损耗小,成本低廉,适用性好,加工简单方便。Advantageous Effects: The heat pump enhanced positive pressure difference of the present invention is a vapor pressure difference energy salt difference power generation device, which is heated by a heat pump to absorb heat in a concentrated solution to lower the temperature of the concentrated solution, and the exothermic heat in the dilute solution causes the temperature of the diluted solution to rise. High, effectively offsets the evaporation of heat in the dilute solution, the inverse temperature difference caused by the condensation of water vapor in the concentrated solution, maintains and expands the positive temperature difference, thereby maintaining and expanding the positive saturated vapor pressure difference, and doing work on the expander It has a promoting effect; high energy utilization efficiency, low loss, low cost, good applicability, and simple and convenient processing.
附图说明DRAWINGS
图1为本发明的结构示意图。Figure 1 is a schematic view of the structure of the present invention.
具体实施方式detailed description
下面结合附图中的实施例对本发明作进一步的说明:The present invention will be further described below in conjunction with the embodiments in the drawings:
如图1所示,本发明的热泵强化的正温差下蒸汽压差能法盐差发电装置,包括热泵加热循环装置和蒸汽压差能法盐差发电装置两部分;主要由膨胀机管道1、稀溶液泵管道2、稀溶液泵3、稀溶液容器4、稀溶液补充液5、稀溶液6、冷凝器7、高压容器8、热泵管道9、节流阀10、低压容器11、蒸发器12、阀门13、排液管道14、浓溶液15、浓溶液容器16、浓溶液补充液17、浓溶液泵管道18、浓溶液泵19、真空泵20、真空泵管道21、压缩机22、膨胀机23、差压计24组成。As shown in FIG. 1 , the heat pump enhanced positive temperature difference steam differential pressure energy salt difference power generation device of the present invention comprises a heat pump heating cycle device and a vapor pressure difference energy salt difference power generation device; mainly composed of an expander pipe 1. Dilute solution pump pipe 2, dilute solution pump 3, dilute solution container 4, dilute solution replenishing liquid 5, dilute solution 6, condenser 7, high pressure container 8, heat pump pipe 9, throttle valve 10, low pressure container 11, evaporator 12 , valve 13, drain pipe 14, concentrated solution 15, concentrated solution container 16, concentrated solution replenishing liquid 17, concentrated solution pump pipe 18, concentrated solution pump 19, vacuum pump 20, vacuum pump pipe 21, compressor 22, expander 23, The differential pressure gauge 24 is composed.
其中,热泵加热循环装置包括冷凝器7、热泵管道9、节流阀10、蒸发器12、压缩机22,冷凝器7、节流阀10、蒸发器12、压缩机22通过热泵管道9依次连接并形成循环装置。蒸汽压差能法盐差发电装置包括低压容器11、高压容器8、膨胀机23、差压计24、膨胀机管道1;低压容器11与高压容器8通过膨胀机管道1相连,膨胀机23设置在膨胀机管道1中,膨胀机管道1上设置差压计24,压差计24设置在膨胀机23出口和入口之间。蒸发器12设置在低压容器11内,低压容器11内装有浓溶液15;冷凝器7设置在高压容器8内,高压容器8内装 有稀溶液6。浓溶液15为饱和溴化锂或者饱和氯化钠溶液;稀溶液6为浓度低于10%的溶液。Wherein, the heat pump heating circulation device comprises a condenser 7, a heat pump pipe 9, a throttle valve 10, an evaporator 12, a compressor 22, a condenser 7, a throttle valve 10, an evaporator 12, and a compressor 22 which are sequentially connected through a heat pump pipe 9. And form a circulation device. The vapor pressure difference energy salt difference power generation device comprises a low pressure vessel 11, a high pressure vessel 8, an expander 23, a differential pressure gauge 24, an expander pipe 1; the low pressure vessel 11 and the high pressure vessel 8 are connected through an expander pipe 1, and the expander 23 is arranged In the expander pipe 1, a differential pressure gauge 24 is disposed on the expander pipe 1, and a differential pressure gauge 24 is disposed between the outlet of the expander 23 and the inlet. The evaporator 12 is disposed in the low pressure vessel 11, and the low pressure vessel 11 is provided with a concentrated solution 15; the condenser 7 is disposed in the high pressure vessel 8, and the high pressure vessel 8 is installed therein. There is a dilute solution 6. The concentrated solution 15 is a saturated lithium bromide or a saturated sodium chloride solution; the diluted solution 6 is a solution having a concentration lower than 10%.
冷凝器7置于稀溶液6中加热稀溶液6,蒸发器12置于浓溶液15中冷却浓溶液15,压缩机22由外部电机带动,热泵管道依次将压缩机22、冷凝器7、节流阀10以及蒸发器12连接起来形成热泵加热循环。The condenser 7 is placed in the dilute solution 6 to heat the dilute solution 6, and the evaporator 12 is placed in the concentrated solution 15 to cool the concentrated solution 15. The compressor 22 is driven by an external motor, and the heat pump pipe sequentially turns the compressor 22, the condenser 7, and the throttling. Valve 10 and evaporator 12 are connected to form a heat pump heating cycle.
蒸汽压差能法盐差发电装置还包括稀溶液容器4、稀溶液补充液5、稀溶液泵3、稀溶液泵管道2、浓溶液容器16、浓溶液补充液17、浓溶液泵19、浓溶液泵管道18。稀溶液容器4内设置稀溶液补充液5,稀溶液容器4通过稀溶液泵管道2与高压容器8相连,稀溶液泵管道2上设置稀溶液泵3。浓溶液容器16内设有浓溶液补充液17,浓溶液容器16通过浓溶液泵管道18与低压容器11相连,浓溶液泵管道18上设置浓溶液泵19。The steam pressure difference energy salt difference power generation device further comprises a dilute solution container 4, a dilute solution replenishing liquid 5, a dilute solution pump 3, a dilute solution pump pipe 2, a concentrated solution container 16, a concentrated solution replenishing liquid 17, a concentrated solution pump 19, and a rich Solution pump line 18. A dilute solution replenishing liquid 5 is disposed in the dilute solution container 4, and the dilute solution container 4 is connected to the high pressure container 8 through the dilute solution pump line 2, and the dilute solution pump 3 is disposed on the dilute solution pump line 2. The concentrated solution container 16 is provided with a concentrated solution replenishing liquid 17, and the concentrated solution container 16 is connected to the low pressure container 11 through the concentrated solution pump line 18, and the concentrated solution pump line 18 is provided with a concentrated solution pump 19.
蒸汽压差能法盐差发电装置还包括真空泵20,真空泵20通过真空泵管道21与低压容器11相连。低压容器11的底部设有排液管道14,排液管道14上设有阀门13。冷凝器7与蒸发器12连接的热泵管道9上设置有节流阀10。The vapor pressure difference method salt difference power generation device further includes a vacuum pump 20 that is connected to the low pressure vessel 11 through a vacuum pump line 21. The bottom of the low pressure vessel 11 is provided with a drain conduit 14 on which a valve 13 is provided. A throttle valve 10 is disposed on the heat pump conduit 9 to which the condenser 7 is connected to the evaporator 12.
在蒸汽压差能法盐差发电回路中,高压容器8内盛有稀溶液6,稀溶液容器4中装有稀溶液补充液5,稀溶液泵3将稀溶液容器4中的稀溶液补充液5补充到高压容器8中,在低压容器11中盛有浓溶液15,浓溶液容器16中装有浓溶液补充液17,浓溶液泵19将浓溶液容器16中的浓溶液补充液17补充到低压容器11中,同时,低压容器11通过真空泵管道21与真空泵20相连,维持内部真空条件,低压容器11的底部连有通过阀门13来调节排液管道14,高压容器8与低压容器11通过膨胀机管道1与膨胀机23相连,膨胀机23位于低压容器11与高压容器8之间,差压计24位于膨胀机23两侧,由此构成了整个蒸汽压差能法盐差发电回路。In the vapor pressure difference energy salt difference power generation circuit, the high pressure container 8 contains a dilute solution 6, the dilute solution container 4 is filled with a dilute solution replenishing liquid 5, and the dilute solution pump 3 is a dilute solution replenishing liquid in the dilute solution container 4. 5 is added to the high pressure container 8, the concentrated solution 15 is contained in the low pressure container 11, the concentrated solution replenishing liquid 17 is contained in the concentrated solution container 16, and the concentrated solution replenishing liquid 17 in the concentrated solution container 16 is added to the concentrated solution container 17 In the low-pressure vessel 11, at the same time, the low-pressure vessel 11 is connected to the vacuum pump 20 through the vacuum pump pipe 21 to maintain the internal vacuum condition, and the bottom of the low-pressure vessel 11 is connected to the drain pipe 14 through the valve 13, and the high-pressure vessel 8 and the low-pressure vessel 11 are expanded. The machine pipe 1 is connected to the expander 23, the expander 23 is located between the low pressure vessel 11 and the high pressure vessel 8, and the differential pressure gauge 24 is located on both sides of the expander 23, thereby constituting the entire vapor pressure difference energy salt difference power generation circuit.
在相同的温度条件下,盛于高压容器8中的稀溶液6较盛于低压容器11中的浓溶液15更容易蒸发,真空泵20为低压容器11创造真空条件,使得高压容器8中的压力高于低压容器11中的压力,高压容器8中的水蒸气因压差作用经膨胀机管道1带动膨胀机23转动发电,水蒸气随后进入到低压容器11中,在低压容器11中的浓溶液15表面冷凝放热,在装置不断运行的过程中,高压容器8中的稀溶液6因水的蒸发而减少,稀溶液泵3通过稀溶液泵管道2将稀溶液补充 液5补充到高压容器8中维持高压容器8中稀溶液6的液位不变,同样因水蒸气在低压容器11中的浓溶液15表面冷凝,使浓溶液15被稀释浓度降低,通过排液管道14及时将稀释后的浓溶液15定量排出低压容器11,浓溶液泵19通过浓溶液泵管道18将浓溶液补充液17定量补充到低压容器11中,维持低压容器11中浓溶液15浓度不变。同时由于稀溶液6中水蒸发吸热,使得高压容器8中温度逐渐降低,浓溶液15中水蒸气冷凝放热,使得低压容器11中的温度逐渐升高,由此产生高压容器8的温度低于低压容器11的温度,高压容器8的逆向温差削弱了正向压差的作用而使膨胀机23做功减少,在低压容器11的浓溶液15中安置蒸发器12,在高压容器8的稀溶液6中安置冷凝器7,并通过热泵管道9与压缩机22以及节流阀10连接,构成热泵加热循环,热泵加热循环中的介质在蒸发器12中吸热蒸发,使浓溶液15温度降低,促进了水蒸气在浓溶液15表面的冷凝,使得低压容器11中压力进一步降低,热泵加热循环中的工质在冷凝器7中冷却放热,使稀溶液6温度升高,促进了水在稀溶液6表面的蒸发,使得高压容器8中压力进一步升高,不仅抵消由于稀溶液6中水蒸发吸热,浓溶液15中水蒸气冷凝放热而产生的逆温差,还可以产生正温差,进一步扩大压差,促进膨胀机23做功,强化蒸汽压差能法盐差发电,提高系统功率。Under the same temperature conditions, the dilute solution 6 contained in the high pressure vessel 8 is more easily evaporated than the concentrated solution 15 contained in the low pressure vessel 11, and the vacuum pump 20 creates a vacuum condition for the low pressure vessel 11, so that the pressure in the high pressure vessel 8 is high. In the pressure in the low-pressure vessel 11, the water vapor in the high-pressure vessel 8 is driven by the expander pipe 1 to generate electricity due to the pressure difference, and the water vapor then enters the low-pressure vessel 11 and the concentrated solution in the low-pressure vessel 11 The surface condensation is exothermic. During the continuous operation of the device, the dilute solution 6 in the high pressure vessel 8 is reduced by the evaporation of water, and the dilute solution pump 3 replenishes the dilute solution through the dilute solution pump pipe 2. The liquid 5 is replenished into the high pressure container 8 to maintain the liquid level of the dilute solution 6 in the high pressure container 8, and the surface of the concentrated solution 15 in the low pressure container 11 is also condensed by the water vapor, so that the concentrated solution 15 is diluted and the concentration is lowered. The pipe 14 timely discharges the diluted concentrated solution 15 into the low-pressure vessel 11 , and the concentrated solution pump 19 quantitatively replenishes the concentrated solution replenishing liquid 17 into the low-pressure vessel 11 through the concentrated solution pump pipe 18 to maintain the concentration of the concentrated solution 15 in the low-pressure vessel 11 change. At the same time, due to the evaporation of water in the dilute solution 6, the temperature in the high pressure vessel 8 is gradually lowered, and the water vapor in the concentrated solution 15 is condensed and released, so that the temperature in the low pressure vessel 11 is gradually increased, thereby generating a low temperature of the high pressure vessel 8. At the temperature of the low pressure vessel 11, the reverse temperature difference of the high pressure vessel 8 weakens the effect of the forward pressure difference to reduce the work of the expander 23, and the evaporator 12 is disposed in the concentrated solution 15 of the low pressure vessel 11, and the dilute solution in the high pressure vessel 8 The condenser 7 is disposed in the sixth stage, and is connected to the compressor 22 and the throttle valve 10 through the heat pump pipe 9, and constitutes a heat pump heating cycle. The medium in the heat pump heating cycle absorbs heat in the evaporator 12 to evaporate, so that the temperature of the concentrated solution 15 is lowered. The condensation of water vapor on the surface of the concentrated solution 15 is promoted, so that the pressure in the low pressure vessel 11 is further lowered, and the working medium in the heat pump heating cycle is cooled and released in the condenser 7, so that the temperature of the diluted solution 6 is raised, and the water is promoted. The evaporation of the surface of the solution 6 causes the pressure in the high pressure vessel 8 to further increase, not only counteracting the inverse temperature difference caused by the condensation of the water vapor in the concentrated solution 15 due to the evaporation of the water in the dilute solution 6, and To produce a positive temperature differential, further expansion pressure, acting to promote the expander 23, the vapor pressure difference can strengthen the difference of salt generation, increase system power.
本发明的热泵强化的正温差下蒸汽压差能法盐差发电装置,通过热泵加热循环,在浓溶液中吸热使得浓溶液温度降低,在稀溶液中放热使得稀溶液温度升高,有效的抵消了水在稀溶液中蒸发吸热、水蒸气在浓溶液中冷凝放热产生的逆温差,维持并扩大正温差,进而维持并扩大正的饱和蒸汽压差,对膨胀机做功有促进作用;能量利用效率高,损耗小,成本低廉,适用性好,加工简单方便。 The heat pump enhanced positive temperature difference steam differential pressure energy salt difference power generation device of the present invention is heated by a heat pump to absorb heat in a concentrated solution to lower the temperature of the concentrated solution, and the exothermic heat in the dilute solution causes the temperature of the diluted solution to rise, effectively It counteracts the inverse temperature difference caused by the evaporation of water in the dilute solution and the condensation and exotherm of water vapor in the concentrated solution, maintaining and expanding the positive temperature difference, thereby maintaining and expanding the positive saturated vapor pressure difference, which promotes the work of the expander. High energy utilization efficiency, low loss, low cost, good applicability, and simple and convenient processing.

Claims (5)

  1. 一种热泵强化的正温差下蒸汽压差能法盐差发电装置,其特征在于:包括热泵加热循环装置和蒸汽压差能法盐差发电装置;A heat pump enhanced positive pressure difference steam differential pressure energy salt difference power generation device, characterized in that: a heat pump heating cycle device and a steam pressure difference energy salt difference power generation device;
    所述热泵加热循环装置包括冷凝器(7)、热泵管道(9)、蒸发器(12)、压缩机(22),所述冷凝器(7)、蒸发器(12)、压缩机(22)通过所述热泵管道(9)依次连接并形成循环装置;The heat pump heating cycle device comprises a condenser (7), a heat pump pipe (9), an evaporator (12), a compressor (22), the condenser (7), an evaporator (12), a compressor (22) Connecting the heat pump conduits (9) in sequence and forming a circulation device;
    所述蒸汽压差能法盐差发电装置包括低压容器(11)、高压容器(8)、膨胀机(23)、差压计(24)、膨胀机管道(1);所述低压容器(11)与所述高压容器(8)通过所述膨胀机管道(1)相连,所述膨胀机(23)设置在所述膨胀机管道(1)中,所述压差计(24)设置在所述膨胀机(23)出口和入口之间;The vapor pressure difference energy salt difference power generation device comprises a low pressure vessel (11), a high pressure vessel (8), an expander (23), a differential pressure gauge (24), an expander pipeline (1); and the low pressure vessel (11) And the high pressure vessel (8) is connected through the expander pipe (1), the expander (23) is disposed in the expander pipe (1), and the differential pressure gauge (24) is disposed at the Between the outlet of the expander (23) and the inlet;
    所述蒸发器(12)设置在所述低压容器(11)内,所述低压容器(11)内装有浓溶液(15);所述冷凝器(7)设置在所述高压容器(8)内,所述高压容器(8)内装有稀溶液(6);The evaporator (12) is disposed in the low pressure vessel (11), the low pressure vessel (11) is provided with a concentrated solution (15); the condenser (7) is disposed in the high pressure vessel (8) The high pressure vessel (8) is filled with a dilute solution (6);
    所述浓溶液(15)为饱和溴化锂或者饱和氯化钠溶液;所述稀溶液(6)为浓度低于10%的溶液。The concentrated solution (15) is a saturated lithium bromide or a saturated sodium chloride solution; the diluted solution (6) is a solution having a concentration of less than 10%.
  2. 根据权利要求1所述的一种热泵强化的正温差下蒸汽压差能法盐差发电装置,其特征在于:所述蒸汽压差能法盐差发电装置还包括稀溶液容器(4)、稀溶液补充液(5)、稀溶液泵(3)、稀溶液泵管道(2)、浓溶液容器(16)、浓溶液补充液(17)、浓溶液泵(19)、浓溶液泵管道(18);The heat pump-enhanced positive pressure difference steam differential pressure energy salt differential power generation device according to claim 1, wherein the vapor pressure difference energy salt difference power generation device further comprises a dilute solution container (4) and a thinner Solution replenishing solution (5), dilute solution pump (3), dilute solution pump tubing (2), concentrated solution container (16), concentrated solution replenishing solution (17), concentrated solution pump (19), concentrated solution pump tubing (18 );
    所述稀溶液容器(4)内放置所述稀溶液补充液(5),所述稀溶液容器(4)通过所述稀溶液泵管道(2)与所述高压容器(8)相连,所述稀溶液泵管道(2)上设置所述稀溶液泵(3);The dilute solution replenishing liquid (5) is placed in the dilute solution container (4), and the dilute solution container (4) is connected to the high pressure container (8) through the dilute solution pump pipe (2), Disposed the dilute solution pump (3) on the dilute solution pump pipe (2);
    所述浓溶液容器(16)内放置所述浓溶液补充液(17),所述浓溶液容器(16)通过所述浓溶液泵管道(18)与所述低压容器(11)相连,所述浓溶液泵管道(18)上设置所述浓溶液泵(19)。The concentrated solution replenishing liquid (17) is placed in the concentrated solution container (16), and the concentrated solution container (16) is connected to the low pressure container (11) through the concentrated solution pumping pipe (18), The concentrated solution pump (19) is disposed on the concentrated solution pump line (18).
  3. 根据权利要求1所述的一种热泵强化的正温差下蒸汽压差能法盐差发电装置,其特征在于:所述蒸汽压差能法盐差发电装置还包括真空泵(20),所述真空泵(20)通过真空泵管道(21)与所述低压容器(11)相连。The heat pump enhanced positive differential temperature steam differential pressure energy salt differential power generation device according to claim 1, wherein the vapor differential energy salt differential power generation device further comprises a vacuum pump (20), the vacuum pump (20) is connected to the low pressure vessel (11) through a vacuum pump line (21).
  4. 根据权利要求1所述的一种热泵强化的正温差下蒸汽压差能法盐差发电 装置,其特征在于:所述低压容器(11)的底部设有排液管道(14),所述排液管道(14)上设有阀门(13)。A heat pump enhanced positive temperature difference steam differential pressure method salt difference power generation according to claim The device is characterized in that: the bottom of the low-pressure vessel (11) is provided with a drain conduit (14), and the drain conduit (14) is provided with a valve (13).
  5. 根据权利要求1所述的一种热泵强化的正温差下蒸汽压差能法盐差发电装置,其特征在于:所述冷凝器(7)与蒸发器(12)连接的热泵管道(9)上设置有节流阀(10)。 The heat pump enhanced positive differential temperature steam differential pressure energy salt differential power generation device according to claim 1, characterized in that: the condenser (7) is connected to the evaporator (12) of the heat pump pipe (9) A throttle valve (10) is provided.
PCT/CN2016/109365 2016-05-06 2016-12-12 Heat pump-reinforced salt-concentration-differential power generation device using vapour differential pressure energy method under positive temperature difference WO2017190505A1 (en)

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