CN217844063U - Three-level flash evaporation triple co-generation system based on valley electricity heat storage - Google Patents
Three-level flash evaporation triple co-generation system based on valley electricity heat storage Download PDFInfo
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Abstract
The utility model discloses a tertiary flash distillation trigeminy supplies system based on millet electricity heat-retaining. The system comprises a valley electricity heat storage system, a three-level flash evaporation steam supply system and a heat pump heat supply system. The valley electricity heat storage system comprises a circulating water tank and a heat storage water tank. The three-stage flash evaporation steam supply system comprises three flash evaporation systems which are sequentially connected. The heat pump heating system comprises a heat pump evaporator, a heat pump compressor, a heat pump condenser and a heat pump expansion valve which are sequentially connected and form a heat pump working medium circulation loop. The system can store high-temperature and high-pressure hot water in a valley electricity heating mode at night, and can supply high-temperature and high-pressure steam, medium-temperature and medium-pressure steam and low-temperature and low-pressure steam respectively through the three-level flash system coupled steam compressor during peak electricity at daytime to meet different working condition requirements. Meanwhile, the water medium after flash evaporation can further deeply recover heat through a heat pump heating system.
Description
Technical Field
The utility model relates to a heat pump technology field specifically is a tertiary flash distillation trigeminy supplies system based on millet electricity heat-retaining.
Background
Among steam boilers, apparatuses for supplying high-temperature and high-pressure steam, which are widely used in various processes of industry and daily life, are mainly classified into a fuel boiler and an electric boiler. The fuel boiler directly utilizes the combustion heat of the fuel to generate steam, and has lower operation cost and higher pollution. In recent years, with the progress of environmental protection, coal-fired boilers are continuously banned and modified. Compared with a fuel boiler, the electric heating boiler not only has environmental protection, but also has more flexible adjusting capability. However, in terms of energy conversion efficiency, the electric heat conversion efficiency of the electric boiler is lower than 1, that is, one part of electric energy can only be converted into less than one part of heat energy. Therefore, the use of the electric boiler results in huge electric energy consumption and higher use cost. Meanwhile, the load impact of the electric boiler on the national power grid is also large. Therefore, an efficient, energy-saving and low-pollution industrial boiler adopting clean fuel and corresponding new technology is a trend of market development, and boiler technology adopting new energy-saving technology like a heat pump steam system and the like is developed more quickly.
However, the heat pump steam system on the market is still not developed, and generally has the characteristic of strong dependence on heat source conditions and environment. In addition, the heat pump steam supply system has high operation power consumption, so the operation cost is high during peak electricity, and the energy efficiency is low. And the existing heat pump steam supply system has limited use mode and is difficult to meet different requirements of users.
Therefore, a new technology is urgently needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a tertiary flash distillation trigeminy supplies system based on millet electricity heat-retaining. The system can store high-temperature and high-pressure hot water in a valley electricity heating mode at night, and can supply high-temperature and high-pressure steam, medium-temperature and medium-pressure steam and low-temperature and low-pressure steam respectively through the three-level flash system coupled steam compressor during peak electricity at daytime to meet different working condition requirements. Meanwhile, the water medium after flash evaporation can further deeply recover heat through a heat pump heating system.
In order to achieve the above object, the utility model provides a following technical scheme: a three-level flash evaporation triple co-generation system based on valley electricity heat storage.
The system comprises a valley electricity heat storage system, a three-level flash evaporation steam supply system and a heat pump heat supply system.
Millet electricity heat-retaining system includes circulation water tank and heat storage water tank, be provided with circulation water tank water inlet and circulation water tank delivery port on the circulation water tank, heat storage water tank includes the heat storage water tank box and sets up in the inside electric heater of heat storage water tank box, be provided with heat storage water tank water inlet and heat storage water tank delivery port on the heat storage water tank box, circulation water tank delivery port and heat storage water tank water inlet are linked together through circulating water pipeline, the last heat-retaining water supplementing pump that is provided with of circulating water pipeline.
Tertiary flash distillation steam supply system includes three consecutive flash system, and the flash system includes the flash tank, and the flash tank all includes the flash tank jar body and sets up the flash atomization nozzle in the flash tank jar body, is provided with flash tank water inlet, flash tank delivery port and flash tank gas outlet on the flash tank jar body, and flash atomization nozzle is linked together with the flash tank water inlet.
The heat pump heating system comprises a heat pump evaporator, a heat pump compressor, a heat pump condenser and a heat pump expansion valve which are sequentially connected and form a heat pump working medium circulation loop, and the heat pump evaporator further comprises an evaporator heat exchange tube.
The water outlet of the heat storage water tank of the valley electricity heat storage system is communicated with the water inlet of the flash tank of the first flash system, the water outlet of the flash tank of the first flash system is communicated with the water inlet of the flash tank of the second flash system, the water outlet of the flash tank of the second flash system is communicated with the water inlet of the flash tank of the third flash system through flash circulation pipes, and each flash circulation pipe is provided with a flash circulation pump. The water outlet of the flash tank of the third flash system is communicated with one end of the evaporator heat exchange tube through a first return pipe, and a return circulating pump is arranged on the first return pipe. The other end of the evaporator heat exchange tube is communicated with a water inlet of a circulating water tank of the valley electricity heat storage system through a second water return tube.
Preferably, the circulating water tank is provided with a circulating water tank outlet, the circulating water tank outlet is connected with a circulating water tank drain pipe, and the circulating water tank drain pipe is provided with a circulating water tank drain stop valve.
Preferably, a heat storage water tank water outlet is formed in the heat storage water tank body and connected with a heat storage water tank water outlet pipe, and a heat storage water tank water discharge stop valve is arranged on the heat storage water tank water outlet pipe.
Preferably, a flash tank water outlet is arranged on the flash tank body and connected with a flash tank water discharge pipe, and a flash tank water discharge stop valve is arranged on the flash tank water discharge pipe.
Preferably, the valley electricity heat storage system further comprises a heat storage and water supplementing pipe, a heat storage and water supplementing stop valve is arranged on the heat storage and water supplementing pipe, and the heat storage and water supplementing pipe is communicated with a water inlet of the heat storage water tank.
Preferably, the flash system further comprises a flash steam compressor, an air inlet of the flash steam compressor is communicated with an air outlet of the flash tank through a flash exhaust pipe, and a flash exhaust stop valve is arranged on the flash exhaust pipe.
Preferably, the flash system further comprises a flash exhaust by-pass pipe, one end of the flash exhaust by-pass pipe is communicated with the gas outlet of the flash tank, the other end of the flash exhaust by-pass pipe is communicated with the gas outlet of the flash steam compressor, and a flash exhaust by-pass stop valve is arranged on the flash exhaust by-pass pipe.
Preferably, the flash distillation system further includes the flash distillation moisturizing pump, and the flash distillation moisturizing pump is linked together through the flash distillation moisturizing pipe with the moisturizing mouth of flash distillation vapor compressor, is provided with flash distillation moisturizing stop valve on the flash distillation moisturizing pipe.
Preferably, the heat pump condenser further comprises a condenser heat exchange tube, the condenser heat exchange tube is communicated with a water outlet of a flash tank of the third flash system through a first return water bypass pipe, and a first return water bypass stop valve is arranged on the first return water bypass pipe.
Preferably, a flash pressure reducing valve and a flash stop valve are further arranged on the flash circulating pipe, the first water return pipe is further provided with a first water return stop valve, and the second water return pipe is further provided with a second water return stop valve.
The three-level flash evaporation triple co-generation system based on valley electricity heat storage can store heat energy in an electric heating mode in the valley period of night electricity utilization, effectively solves the problem that an application and production site depends on a heat source, and can be directly used in numerous heat-source-free application scenes.
In addition, through valley electricity heat storage, this tertiary flash evaporation trigeminy supplies system based on valley electricity heat storage can reduce the power consumption in peak electricity period, and then avoids producing the high price of electricity in peak electricity period, further reduces the running cost of equipment, improves the economic nature that steam produced.
Secondly, the three-level flash evaporation triple co-generation system based on valley electricity heat storage can use water working media as heat storage working media. The water working medium is cheap and has no corrosion to the water tank, so the use cost of the heat storage working medium of the system is further reduced.
Simultaneously, this tertiary flash distillation trigeminy supplies system based on millet electricity heat-retaining is through directly carrying out the flash distillation with high temperature high pressure hot water in order to produce high temperature high pressure steam, and heat exchange efficiency is higher and equipment cost is lower.
Moreover, this tertiary flash distillation trigeminy supplies system based on millet electricity heat-retaining supplies high temperature high pressure steam, medium temperature middling pressure steam and low temperature low pressure steam respectively through tertiary flash distillation system coupling vapor compressor, satisfies different operating mode demands. And the three-stage flash evaporation system makes full use of the heat stored by the valley electricity, and the heat storage utilization rate is improved.
Meanwhile, the three-level flash evaporation triple co-generation system based on valley electricity heat storage is provided with a heat pump heating system, and the supply requirement of high-temperature hot water can be met while steam is supplied. The industrial steam and the high-temperature hot water are effectively supplied within the range of all working conditions.
Drawings
Fig. 1 is a schematic structural diagram of a three-level flash evaporation triple co-generation system based on valley electricity heat storage in an embodiment of the present invention.
The reference numbers and designations in the drawings are as follows:
110. a circulating water tank; 112. a water inlet of the circulating water tank; 114. a water outlet of the circulating water tank; 116. a water outlet of the circulating water tank; 120. a heat storage water tank; 122. a heat storage water tank body; 124. a water inlet of the heat storage water tank; 126. a water outlet of the heat storage water tank; 128. a water outlet of the heat storage water tank; 130. an electric heater; 140. a circulating water pipeline; 142. a heat storage water replenishing pump; 144. a circulating water tank drain pipe; 146. a water discharge stop valve of the circulating water tank; 148. a heat storage water tank drain pipe; 150. a drainage stop valve of the heat storage water tank; 152. a heat storage water replenishing pipe; 154. a heat storage and water replenishing stop valve; 156. a first heat storage stop valve; 158. a second heat storage stop valve; 210. a first flash system; 212. a second flash system; 214. a third flash system; 220. a flash tank; 222. a flash tank body; 224. a flash tank water inlet; 226. a water outlet of the flash tank; 228. an air outlet of the flash tank; 230. a flash tank water outlet; 232. a flash vaporization atomizing nozzle; 234. a flash steam compressor; 240. a flash evaporation circulating pipe; 242. a flash circulating pump; 244. a flash tank drain pipe; 246. a flash tank drainage stop valve; 248. a flash evaporation exhaust pipe; 250. a flash evaporation exhaust stop valve; 252. a flash evaporation exhaust bypass pipe; 254. a flash exhaust bypass stop valve; 256. a flash evaporation water replenishing pump; 258. a flash evaporation water replenishing pipe; 260. a flash evaporation water replenishing stop valve; 262. a flash pressure reducing valve; 264. a flash stop valve; 310. a heat pump evaporator; 312. a heat pump compressor; 314. a heat pump condenser; 316. a heat pump expansion valve; 330. a first water return pipe; 332. a backwater circulating pump; 334. a second water return pipe; 336. a first backwater bypass pipe; 338. a first water return bypass stop valve; 340. a first water return stop valve; 342. and a second water return stop valve.
Detailed Description
Unless otherwise defined, technical or scientific terms used in the present specification and claims should have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Embodiments of the present application relate to a three-stage flash evaporation triple co-generation system based on valley-electricity heat storage as shown in fig. 1.
The system comprises a valley electricity heat storage system, a three-level flash evaporation steam supply system and a heat pump heat supply system.
The valley electricity heat storage system comprises a circulating water tank 110 and a heat storage water tank 120, wherein a circulating water tank water inlet 112 and a circulating water tank water outlet 114 are arranged on the circulating water tank 110, and the heat storage water tank 120 comprises a heat storage water tank body 122 and an electric heater 130 arranged inside the heat storage water tank body 122. The electric heater 130 may be used to heat the working fluid inside the hot-water storage tank body 122. The heat storage water tank body 122 is provided with a heat storage water tank water inlet 124 and a heat storage water tank water outlet 126, the circulating water tank water outlet 114 is communicated with the heat storage water tank water inlet 124 through a circulating water pipeline 140, and the circulating water pipeline 140 is provided with a heat storage water replenishing pump 142.
The three-stage flash steam supply system comprises three flash systems 210, 212 and 214 which are connected in sequence, the flash system comprises a flash tank 220, the flash tank 220 comprises a flash tank body 222 and a flash atomization nozzle 232 arranged in the flash tank body 222, the flash tank body 222 is provided with a flash tank water inlet 224, a flash tank water outlet 226 and a flash tank air outlet 228, and the flash atomization nozzle 232 is communicated with the flash tank water inlet 224. In the embodiment shown in fig. 1, a first flash system 210 of three serially connected flash systems may be used to supply high temperature, high pressure steam, a second flash system 212 may be used to supply medium temperature, medium pressure steam, and a third flash system 214 may be used to supply low temperature, low pressure steam.
The heat pump heating system comprises a heat pump evaporator 310, a heat pump compressor 312, a heat pump condenser 314 and a heat pump expansion valve 316 which are connected in sequence and form a heat pump working medium circulation loop, wherein the heat pump evaporator 310 further comprises an evaporator heat exchange pipe.
The hot water storage tank outlet 126 of the valley electricity heat storage system is communicated with the flash tank water inlet 224 of the first flash system 210, the flash tank water outlet 226 of the first flash system 210 is communicated with the flash tank water inlet 224 of the second flash system 212, the flash tank water outlet 226 of the second flash system 212 is communicated with the flash tank water inlet 224 of the third flash system 214 through flash circulation pipes 240, and each flash circulation pipe 240 is provided with a flash circulation pump 242. The flash tank water outlet 226 of the third flash system 214 is communicated with one end of the evaporator heat exchange tube through a first return pipe 330, and a return circulating pump 332 is arranged on the first return pipe 330. The other end of the evaporator heat exchange pipe is communicated with a heat storage water tank water inlet 124 of the valley electricity heat storage system through a second water return pipe 334.
In some embodiments, the circulation tank 110 is provided with a circulation tank drain 116, the circulation tank drain 116 is connected to a circulation tank drain 144, and the circulation tank drain 144 is provided with a circulation tank drain shut-off valve 146. A circulation tank drain 144 and a circulation tank drain shut-off valve 146 may be used to drain excess water within the circulation tank 110.
In some embodiments, a hot water tank outlet 128 is provided on the hot water tank body 122, the hot water tank outlet 128 is connected to a hot water tank outlet 148, and a hot water tank outlet stop valve 150 is provided on the hot water tank outlet 148. The hot water storage tank drain 148 and the hot water storage tank drain shut-off valve 150 may be used to drain excess water working medium in the hot water storage tank 120.
In some embodiments, the flash tank body 222 is provided with a flash tank drain 230, the flash tank drain 230 is connected to a flash tank drain 244, and the flash tank drain 244 is provided with a flash tank drain shut-off valve 246. A flash tank drain 244 and a flash tank drain shut-off valve 246 may be used to drain excess water working fluid within the flash tank 220.
In some embodiments, the valley-electricity heat storage system further includes a heat storage water replenishing pipe 152, a heat storage water replenishing stop valve 154 is disposed on the heat storage water replenishing pipe 152, and the heat storage water replenishing pipe 152 is communicated with the heat storage water tank water inlet 124. When the heat storage and water supplement stop valve 154 is opened, the heat storage and water supplement pipe 152 may be used to supplement water working medium to the heat storage water tank 120, so as to ensure sufficient water working medium is stored in the heat storage water tank 120. When the heat storage and water supplement stop valve 154 is closed, the heat storage and water supplement pipe 152 can stop supplementing water working medium to the heat storage water tank 120.
In some embodiments, the flash system further comprises a flash water vapor compressor 234, wherein an air inlet of the flash water vapor compressor 234 is communicated with the flash tank air outlet 228 via a flash exhaust pipe 248, and a flash exhaust shutoff valve 250 is disposed on the flash exhaust pipe 248. A flash steam compressor 234 may be used to further compress the steam exiting the flash tank outlet 228.
In some embodiments, the flash system further comprises a flash exhaust bypass pipe 252, one end of the flash exhaust bypass pipe 252 is in communication with the flash tank outlet 228, the other end of the flash exhaust bypass pipe 252 is in communication with the outlet of the flash water vapor compressor 234, and a flash exhaust bypass shutoff valve 254 is disposed on the flash exhaust bypass pipe 252.
In some embodiments, the flash evaporation system further comprises a flash evaporation water replenishing pump 256, the flash evaporation water replenishing pump 256 is communicated with the water replenishing port of the flash evaporation water vapor compressor 234 through a flash evaporation water replenishing pipe 258, and a flash evaporation water replenishing stop valve 260 is arranged on the flash evaporation water replenishing pipe 258. The flash evaporation water supplementing pipe 258 can convey external supplementing water to the compression cavity of the flash evaporation water vapor compressor 234, so that the degree of superheat of the compression process is reduced, and the safety and the high efficiency of the compression process are guaranteed.
In some embodiments, the heat pump condenser 314 further comprises a condenser heat exchange tube, the condenser heat exchange tube is communicated with the flash tank water outlet 226 of the third flash system 214 through a first water return bypass pipe 336, and the first water return bypass pipe 336 is provided with a first water return bypass stop valve 338.
In some embodiments, the flash circulation pipe 240 is further provided with a flash pressure reducing valve 262 and a flash stop valve 264, the first water return pipe 330 is further provided with a first water return stop valve 340, and the second water return pipe 334 is further provided with a second water return stop valve 342.
The system that above-mentioned embodiment relates to can store high temperature high pressure hot water through the mode of millet electricity heating when the night millet electricity to supply high temperature high pressure steam, medium temperature medium pressure steam and low temperature low pressure steam respectively through tertiary flash system coupling vapor compressor when peak electricity in daytime, satisfy different operating mode demands. Meanwhile, the water medium after flash evaporation can further deeply recover heat through a heat pump heating system.
The operation of the three-stage flash evaporation triple co-generation system based on valley electricity heat storage is briefly described with reference to fig. 1.
In the embodiment shown in fig. 1, the circulating water pipe 140 is provided with a heat storage water replenishing pump 142, a first heat storage stop valve 156 and a second heat storage stop valve 158. The electricity price is cheap and the electricity load is sufficient when the electricity is valley at night. Therefore, at night, the heat storage and water replenishing pump 142, the first heat storage stop valve 156 and the second heat storage stop valve 158 can be opened, and the low-temperature water working medium stored in the circulation water tank 110 in the daytime can be conveyed to the heat storage water tank 120 through the circulation water pipeline 140. Subsequently, the first heat storage stop valve 156 may also be closed, and the heat storage water replenishing stop valve 154 may be opened to replenish the heat storage water tank 120 with the water working medium through the heat storage water replenishing pipe 152, so as to ensure that sufficient water working medium is stored in the heat storage water tank 120. The electric heater 130 in the heat storage water tank body 122 can heat the liquid water working medium in the heat storage water tank 120 to a temperature above 200 ℃, and correspondingly, the pressure is above 1.555MPa, and most of the water working medium in the heat storage water tank 120 is kept in a liquid state, and only a small amount of the water working medium is kept in a steam state. The heat storage water tank 120 may implement a valley point heat storage function by using a high-temperature and high-pressure water working medium.
When peak electricity is generated and water vapor needs to be used in the daytime, a flash stop valve 264 and a flash circulating pump 242 which are arranged between a water outlet 126 of a heat storage water tank of the valley electricity heat storage system and a water inlet 224 of a flash tank of the first flash system 210 are opened, a flash reducing valve 262 is adjusted, a high-temperature high-pressure water working medium with the temperature of more than 200 ℃ stored in the heat storage water tank 120 flows into the flash tank 220 of the first flash system 210 through the flash circulating pipe 240, pressure is reduced in the flash tank 220 of the first flash system 210 for flash evaporation, high-temperature high-pressure steam with the temperature of 180 ℃ and the pressure of about 1.003MPa and high-temperature high-pressure saturated water with the temperature of 180 ℃ and the pressure of about 1.003MPa are generated.
At this time, according to the user's requirement, there are two ways of supplying high-temperature and high-pressure steam with a temperature of 180 ℃ and a pressure of about 1.003 MPa. The first way is to open the flash exhaust bypass stop valve 254 and close the flash exhaust stop valve 250, and the high-temperature and high-pressure steam with the temperature of 180 ℃ and the pressure of about 1.003MPa is directly supplied to the user through the flash exhaust bypass pipe 252. The second way is to close the flash exhaust bypass stop valve 254 and open the flash exhaust stop valve 250, so that the high-temperature and high-pressure steam with the temperature of 180 ℃ and the pressure of about 1.003MPa is compressed by the flash steam compressor 234 to become high-temperature and high-pressure steam with the temperature of 200 ℃ and the pressure of about 1.555MPa, which is supplied to the user for use, thereby meeting the heat demand of steam with the temperature of more than 200 ℃. In the working process of the flash evaporation water vapor compressor 234, the flash evaporation water replenishing pump 256 and the flash evaporation water replenishing stop valve 260 can also be opened, and external replenishing water can be conveyed into the compression cavity of the flash evaporation water vapor compressor 234 through the flash evaporation water replenishing pipe 258 so as to reduce the degree of superheat of the compression process and ensure the safety and high efficiency of the compression process.
Similarly, the high-temperature high-pressure saturated water with the temperature of 180 ℃ and the pressure of about 1.003MPa generated by the first flash evaporation system 210 is delivered to the second flash evaporation system 212, and is subjected to pressure reduction flash evaporation in the flash evaporation tank 220 of the second flash evaporation system 212 to generate medium-temperature medium-pressure steam with the temperature of 120-160 ℃ and the pressure of about 0.199-0.618 MPa and medium-temperature medium-pressure saturated water with the temperature of 120-160 ℃ and the pressure of about 0.199-0.618 MPa. The medium-temperature medium-pressure steam with the temperature of 120-160 ℃ and the pressure of about 0.199-0.618 MPa can be directly supplied to users through a flash evaporation exhaust bypass pipe 252 for use. The steam may be compressed by the flash steam compressor 234 to be high-temperature and high-pressure steam having a temperature of 180 ℃ and a pressure of about 1.003MPa, and supplied to users to satisfy the heat demand for steam of 180 ℃ or higher.
Similarly, the medium-temperature medium-pressure saturated water with the temperature of 120-160 ℃ and the pressure of about 0.199-0.618 MPa generated by the second flash evaporation system 212 is delivered to the third flash evaporation system 214, and is subjected to pressure reduction flash evaporation in the flash tank 220 of the third flash evaporation system 214 to generate low-temperature low-pressure steam with the temperature of 80-100 ℃ and the pressure of about 0.047-0.101 MPa and low-temperature low-pressure saturated water with the temperature of 80-100 ℃ and the pressure of about 0.047-0.101 MPa. The low-temperature low-pressure steam with the temperature of 80-100 ℃ and the pressure of about 0.047-0.101 MPa can be directly supplied to users through the flash evaporation exhaust bypass pipe 252 for use. Or compressed by the flash steam compressor 234 to be middle-temperature and middle-pressure steam with the temperature of 120 ℃ and the pressure of about 0.199MPa, and the steam is supplied to users to meet the heat demand of steam with the temperature of more than 120 ℃.
The heat pump heating system can select three modes of no hot water supply, direct hot water supply and high-temperature hot water after being heated by the heat pump according to different requirements of users.
When the heat pump heating system is in a non-heating water mode, the return water circulating pump 332 is opened, the first return water stop valve 340 and the second return water stop valve 342 are opened, and the first return water bypass stop valve 338 is closed. At this time, the low-temperature saturated water having a temperature of about 80 to 100 ℃ in the flash tank 220 of the third flash system 214 may flow into the evaporator heat exchange pipe through the first water return pipe 330, and flow into the circulation water tank 110 through the second water return pipe 334 to be stored.
When the heat pump heating system is in the direct hot water supply mode, the first return bypass cut-off valve 338 is open, and the first return cut-off valve 340 is closed. At this time, the low-temperature saturated water with the temperature of about 80 to 100 ℃ in the flash tank 220 of the third flash system 214 can flow through the condenser heat exchange tube through the flash exhaust bypass tube 252 and then flow out for the user.
When the heat pump heating system is in a high-temperature hot water mode after heat pump heating, the water return circulating pump 332 is opened, the first water return stop valve 340, the second water return stop valve 342 and the first water return bypass stop valve 338 are opened, the first water return stop valve 340 and the first water return bypass stop valve 338 are adjusted, and the low-temperature saturated water flow flowing through the evaporator heat exchange tube and the condenser heat exchange tube is reasonably matched. When the heat pump heating system works, the low-temperature saturated water with the temperature of about 80-100 ℃ in the flash tank 220 of the third flash system 214 flows through the evaporator heat exchange tubes and releases heat, and then flows into the circulating water tank 110 through the second water return tube 334 to be stored. The heat pump working medium absorbs the heat of the low-temperature saturated water with the temperature of about 80-100 ℃ in the heat pump evaporator 310 to evaporate, flows into the heat pump compressor 312, and is compressed in the heat pump compressor 312 to raise the temperature and the pressure. Then, the heat pump working medium flows into the heat pump condenser 314 and condenses and heats the low-temperature saturated water which flows through the heat exchange tube of the condenser and is at the temperature of about 80-100 ℃ in the heat pump condenser 314, so that the temperature of the saturated water is raised to be above 100 ℃ and then the saturated water is supplied to users for use. Then, the condensed heat pump working medium is cooled and depressurized by the heat pump expansion valve 316 and then flows into the heat pump evaporator 310 again to form a complete heat pump working medium cycle.
To sum up, the three-level flash evaporation triple co-generation system based on valley electricity heat storage can store heat energy in an electric heating mode in the valley period of night electricity utilization, effectively solves the problem that an application and production site depends on a heat source, and can be directly used in numerous heat-source-free application scenes.
In addition, through valley electricity heat storage, this tertiary flash evaporation trigeminy supplies system based on valley electricity heat storage can reduce the power consumption in peak electricity period, and then avoids producing the high price of electricity in peak electricity period, further reduces the running cost of equipment, improves the economic nature that steam produced.
Secondly, the three-level flash evaporation triple co-generation system based on valley electricity heat storage can use water working media as heat storage working media. The water working medium is cheap and has no corrosion to the water tank, so that the use cost of the heat storage working medium of the system is further reduced.
Simultaneously, this tertiary flash distillation trigeminy supplies system based on millet electricity heat-retaining is through directly carrying out the flash distillation with high temperature high pressure hot water in order to produce high temperature high pressure steam, and heat exchange efficiency is higher and equipment cost is lower.
In addition, the three-level flash evaporation triple supply system based on valley electricity heat storage supplies high-temperature high-pressure steam, medium-temperature medium-pressure steam and low-temperature low-pressure steam respectively through a three-level flash evaporation system coupled with a steam compressor, so that different working condition requirements are met. And the three-stage flash evaporation system makes full use of the heat stored by the valley electricity, and the heat storage utilization rate is improved.
Meanwhile, the three-level flash evaporation triple-supply system based on valley electricity heat storage is provided with a heat pump heat supply system, and the supply requirement of high-temperature hot water can be met while steam is supplied. The industrial steam and the high-temperature hot water are effectively supplied within the range of the whole working condition.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A three-level flash evaporation triple co-generation system based on valley electricity heat storage is characterized by comprising a valley electricity heat storage system, a three-level flash evaporation steam supply system and a heat pump heat supply system;
the valley-point electricity heat storage system comprises a circulating water tank and a heat storage water tank, wherein a circulating water tank water inlet and a circulating water tank water outlet are formed in the circulating water tank, the heat storage water tank comprises a heat storage water tank body and an electric heater arranged in the heat storage water tank body, a heat storage water tank water inlet and a heat storage water tank water outlet are formed in the heat storage water tank body, the circulating water tank water outlet is communicated with the heat storage water tank water inlet through a circulating water pipeline, and a heat storage water supplementing pump is arranged on the circulating water pipeline;
the three-stage flash steam supply system comprises three flash systems which are sequentially connected, each flash system comprises a flash tank, each flash tank comprises a flash tank body and a flash atomization nozzle arranged in the flash tank body, the flash tank body is provided with a flash tank water inlet, a flash tank water outlet and a flash tank air outlet, and the flash atomization nozzles are communicated with the flash tank water inlets;
the heat pump heating system comprises a heat pump evaporator, a heat pump compressor, a heat pump condenser and a heat pump expansion valve which are sequentially connected and form a heat pump working medium circulation loop, and the heat pump evaporator further comprises an evaporator heat exchange tube;
a water outlet of a heat storage water tank of the valley point electricity heat storage system is communicated with a water inlet of a flash tank of a first flash system, a water outlet of the flash tank of the first flash system is communicated with a water inlet of a flash tank of a second flash system, a water outlet of the flash tank of the second flash system is communicated with a water inlet of a flash tank of a third flash system through flash circulating pipes, and each flash circulating pipe is provided with a flash circulating pump; a water outlet of a flash tank of the third flash system is communicated with one end of the heat exchange tube of the evaporator through a first return pipe, and a return circulating pump is arranged on the first return pipe; and the other end of the evaporator heat exchange tube is communicated with a water inlet of a circulating water tank of the valley-current heat storage system through a second water return tube.
2. The valley-electricity-heat-storage-based three-stage flash evaporation three-supply system is characterized in that a circulating water tank water outlet is formed in the circulating water tank and is connected with a circulating water tank water outlet pipe, and a circulating water tank water outlet stop valve is arranged on the circulating water tank water outlet pipe.
3. The three-level flash evaporation triple co-generation system based on valley electricity heat storage according to claim 1, wherein a heat storage water tank water outlet is formed in the heat storage water tank body, the heat storage water tank water outlet is connected with a heat storage water tank water outlet pipe, and a heat storage water tank water outlet stop valve is arranged on the heat storage water tank water outlet pipe.
4. The valley electricity heat storage based three-level flash triple co-generation system is characterized in that a flash tank water outlet is formed in the flash tank body and connected with a flash tank water drainage pipe, and a flash tank water drainage stop valve is arranged on the flash tank water drainage pipe.
5. The valley power heat storage-based three-level flash evaporation three-supply system is characterized in that the valley power heat storage system further comprises a heat storage water replenishing pipe, a heat storage water replenishing stop valve is arranged on the heat storage water replenishing pipe, and the heat storage water replenishing pipe is communicated with a water inlet of the heat storage water tank.
6. The valley power heat storage-based three-level flash triple co-generation system is characterized in that the flash system further comprises a flash steam compressor, a gas inlet of the flash steam compressor is communicated with a gas outlet of the flash tank through a flash exhaust pipe, and a flash exhaust stop valve is arranged on the flash exhaust pipe.
7. The valley-electricity-heat-storage-based three-level flash evaporation three-supply system is characterized in that the flash evaporation system further comprises a flash evaporation exhaust by-pass pipe, one end of the flash evaporation exhaust by-pass pipe is communicated with an air outlet of the flash evaporation tank, the other end of the flash evaporation exhaust by-pass pipe is communicated with an air outlet of the flash evaporation steam compressor, and a flash evaporation exhaust by-pass stop valve is arranged on the flash evaporation exhaust by-pass pipe.
8. The valley electricity heat storage based three-level flash evaporation triple co-generation system is characterized in that the flash evaporation system further comprises a flash evaporation water replenishing pump, the flash evaporation water replenishing pump is communicated with a water replenishing port of the flash evaporation water vapor compressor through a flash evaporation water replenishing pipe, and a flash evaporation water replenishing stop valve is arranged on the flash evaporation water replenishing pipe.
9. The valley-electricity-heat-storage-based three-stage flash evaporation triple co-generation system is characterized in that the heat pump condenser further comprises a condenser heat exchange tube, the condenser heat exchange tube is communicated with a flash tank water outlet of the third flash evaporation system through a first return water bypass pipe, and a first return water bypass stop valve is arranged on the first return water bypass pipe.
10. The valley-power-storage-based three-level flash evaporation three-supply system is characterized in that a flash evaporation pressure reducing valve and a flash evaporation stop valve are further arranged on the flash evaporation circulating pipe, the first water return pipe is further provided with a first water return stop valve, and the second water return pipe is further provided with a second water return stop valve.
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| CN118424022A (en) * | 2024-07-04 | 2024-08-02 | 珠海格力电器股份有限公司 | Steam storage system and steam storage and supply device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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