CN217077040U - Solar seawater desalination system - Google Patents
Solar seawater desalination system Download PDFInfo
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- CN217077040U CN217077040U CN202220780517.7U CN202220780517U CN217077040U CN 217077040 U CN217077040 U CN 217077040U CN 202220780517 U CN202220780517 U CN 202220780517U CN 217077040 U CN217077040 U CN 217077040U
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Abstract
The utility model relates to a solar energy sea water desalination, including sea water source, sea water buffer tank, sea water elevator pump, sea water tank, distiller unit group and fresh water tank. The utility model has the advantages that: the utility model provides a solar energy sea water desalination system has connected the solar energy sea water desalination distiller of a plurality of unitization effectively to realize from sea water intaking to distillation condensation, fresh water collection with the automatic operation of processes such as dense water evacuation, this system safe and reliable, high-efficient stable, economical and practical.
Description
Technical Field
The utility model relates to a solar photothermal utilization field, more precisely, it relates to solar seawater desalination system.
Background
The existing large-scale seawater desalination plant mainly adopts reverse osmosis and low-temperature multi-effect distillation technology, but is difficult to comprehensively cover islands, offshore platforms, mudflats and coastal remote towns and villages due to the problems of large-scale cost and long-distance water delivery cost caused by high energy consumption. The solar seawater desalination equipment and system are expected to provide sufficient and cheap fresh water drinking water for small-scale distributed life production in the fields, and realize the convenience, high efficiency, energy conservation, low carbon, economy and environmental protection of the seawater desalination technology.
The solar seawater desalination thermal method technology mainly utilizes solar photo-thermal resources to heat seawater, phase change evaporation is carried out on the seawater, and fresh water is obtained through condensation and collection. The photo-thermal solar seawater desalination technology has the advantages of high efficiency, low cost, simple maintenance and the like, and is the mainstream solar seawater desalination technology at present. The thermal method solar seawater desalination can be divided into solar-assisted multiple-effect evaporation, multi-stage flash evaporation, heat pump seawater desalination, membrane distillation, humidification and dehumidification and a solar distiller according to different evaporation and condensation modes, wherein the solar distiller is small in occupied area, independent and flexible, and can meet the application requirements of unit distributed small seawater desalination. However, solar still research is currently focused on a single unit of equipment, which can only supply individual-scale amounts of fresh water.
The heat absorbing medium of the conventional solar still includes seawater and a base, and not only heats water in an evaporation part, but also heats concentrated water finally discharged. Although the heated concentrated water can be subjected to heat recovery through a heat exchanger or the water body is preheated by using latent heat of condensation in a large-scale seawater desalination facility, the problem of heat loss of the concentrated water is inevitable; in a small-sized seawater desalination plant, the heat loss ratio brought by directly discharging concentrated water is almost equivalent to the concentrated water-evaporation flow ratio.
The relevant documents are: zhang Xuan radium, Bo Yuan and Liu Qiang in electric power science and engineering, 2017,33(12):1-8, published "New technical development State of solar seawater desalination" [ J ]; xiao, G., Wang, X., Ni, M., et al, Applied Energy 103, 642-652 (2013), A review on solar still for bromine depletion.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough among the prior art, provide a solar energy sea water desalination, include: the seawater desalination device comprises a seawater source, a seawater buffer tank, a seawater lifting pump, a seawater tank, a distiller unit group and a fresh water tank;
the seawater source is connected with the inlet of a seawater buffer tank, and the outlet of the seawater buffer tank is connected to the inlet of a seawater lifting pump; the outlet of the seawater lifting pump is connected to the inlet of the seawater tank; the outlet of the seawater tank is connected to the inlet of the distiller unit group; the distiller unit group outlet comprises a fresh water outlet and a concentrated water outlet, the fresh water outlet is connected to the fresh water tank, and the concentrated water outlet is connected to a sewage discharge position.
Preferably, the set of distiller units comprises at least one distiller unit comprising: the electric valve in front of the metering pump, the backpressure valve, the distiller and the electric valve at the concentrated water outlet;
the outlet of the distiller for producing concentrated water is connected with the electric valve of the concentrated water outlet in series and connected to the sewage discharge outlet; the still units in the set of still units are connected to each other in parallel.
Preferably, the seawater buffer tank comprises a first water tank, a ball float valve, a first overflow pipe and a first liquid level meter; the seawater tank comprises a second tank, a second overflow pipe and a second liquid level meter; the fresh water tank includes a third water tank, a third overflow tube, and a third level gauge.
Preferably, the back pressure valve is rated for a pressure higher than the static pressure difference between the seawater tank and the still.
Preferably, the distiller is one or more solar seawater desalination distiller(s) of ladder type, pyramid type, cylinder type, light concentrating type or light tracing type based on interface evaporation; when the distiller is a plurality of solar seawater desalination distillers, the water inlet pipelines and the water outlet pipelines of the plurality of solar seawater desalination distillers are connected in parallel.
Preferably, the water pipe for connection in the system is a UPVC pipe or a stainless steel pipe; the diameter range of the water pipe in the distiller unit group is 10-50 mm, and the diameter range of the rest water pipes in the system is 20-200 mm.
Preferably, the solar seawater desalination system further comprises a control system; the control system includes: the system comprises a sunlight irradiation instrument, an industrial controller, a PLC control cabinet, an engineer station, corresponding software and a control strategy.
The beneficial effects of the utility model are that: the utility model provides a solar energy sea water desalination system has connected the solar energy sea water desalination distiller of a plurality of unitization effectively to realize from sea water intaking to distillation condensation, fresh water collection with the automatic operation of processes such as dense water evacuation, this system safe and reliable, high-efficient stable, economical and practical.
Drawings
FIG. 1 is a schematic view of a working process of a solar seawater desalination system provided herein;
FIG. 2 is a schematic view of the overall process of the solar seawater desalination system provided herein;
FIG. 3 is a schematic process diagram of a still unit provided herein;
description of the reference numerals: the seawater desalination system comprises a seawater source 000, a seawater buffer tank 001, a seawater lifting pump 002, a seawater water tank 003, a distiller unit group 004, a metering pump front electric valve 004-1, a metering pump 004-2, a back pressure valve 004-3, a distiller 004-4, a concentrated water outlet electric valve 004-5 and a fresh water tank 005.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, the present invention can be modified in several ways without departing from the principle of the present invention, and these modifications and modifications also fall into the protection scope of the claims of the present invention.
Example 1:
as shown in fig. 1, the solar seawater desalination system utilizes solar photo-thermal resources to evaporate, condense and collect seawater by an integrated unitized solar distiller, thereby realizing large-scale automatic operation of seawater desalination.
A solar seawater desalination system, as shown in fig. 2, includes: a seawater source 000, a seawater buffer tank 001, a seawater lifting pump 002, a seawater tank 003, a distiller unit group 004 and a fresh water tank 005;
wherein the seawater source 000 is connected with the inlet of the seawater buffer tank 001, and the seawater source 000 comprises non-corrosive seawater, salt lake water, high-salinity wastewater or urban reclaimed water and the like with turbidity (NTU) less than or equal to 1, salt concentration less than or equal to 10% and Chemical Oxygen Demand (COD) less than or equal to 50 mg/L; an outlet of the seawater buffer tank 001 is connected to an inlet of a seawater lifting pump 002, an outlet of the seawater lifting pump 002 is connected to an inlet of a seawater water tank 003, the seawater lifting pump 002 can be controlled to start and stop by a controller, the lift is not lower than the height difference between the seawater water tank 003 and the seawater buffer tank 001, and the flow meets the rated daily seawater consumption of a conveying system within 5-120 minutes; the seawater lift pump 002 is made of high-salt-resistant and corrosion-resistant materials such as lining rubber, polypropylene, fluoroplastic, stainless steel and the like; the outlet of the seawater tank 003 is connected to the inlet of the distiller unit group 004; the outlet of the distiller unit group 004 comprises a fresh water outlet and a concentrated water outlet, the fresh water outlet is connected to the fresh water tank 005, and the concentrated water outlet is connected to a sewage discharge position.
The distiller unit set 004 includes at least one distiller unit, and the system is rated with daily seawater usage and daily fresh water production, which are respectively obtained by adding up the rated daily seawater usage and daily fresh water production of each distiller unit in the distiller unit set, as shown in fig. 3, each distiller unit includes: an electric valve 004-1 in front of the metering pump, a metering pump 004-2, a back pressure valve 004-3, a distiller 004-4 and an electric valve 004-5 at a concentrated water outlet;
wherein, the outlet of the seawater tank 003 is communicated with the front electric valve 004-1 of the metering pump of each distiller unit, the front electric valve 004-1 of the metering pump, the metering pump 004-2 and the back pressure valve 004-3 are connected with the distiller 004-4 in series, the outlet of the distiller 004-4 for generating fresh water is connected to the fresh water tank 005, and the outlet of the distiller 004-4 for generating concentrated water is connected with the electric valve 004-5 of the concentrated water outlet in series and connected to the sewage discharge; the still units in the still unit group 004 are connected to each other in parallel; the metering pump 004-2 can be controlled to start and stop by a controller, the suction lift is not less than the height difference between the seawater tank 003 and the distiller 004-4, the flow range meets the rated daily seawater consumption of the distiller in 30-120 minutes, and the metering pump can be manually adjusted; the metering pump 004-2 is made of high-salt-resistant and anti-corrosion materials such as lining rubber, polypropylene, fluoroplastic, stainless steel and the like.
The seawater buffer tank 001 comprises a first water tank, a ball float valve, a first overflow pipe and a first liquid level meter; the seawater tank 003 comprises a second tank, a second overflow pipe and a second liquid level meter; the fresh water tank 005 includes a third water tank, a third overflow pipe, and a third level gauge. Wherein, the first water tank is made of stainless steel with an anticorrosive coating, engineering plastics and cement, and the volume of the first water tank meets 2-7 times of the daily seawater consumption of the system rating; the float valve is used for automatically controlling the liquid level of seawater in the water tank, the valve closing liquid level height is usually selected to be 50-85% of the tank height, and the valve opening liquid level height is usually selected to be 10-30% of the tank height; the first overflow pipe is used to prevent the situation of abnormally raised liquid level, the height of which is usually chosen to be 85-95% of the tank height; the first liquid level meter comprises a turning plate liquid level meter with a signal transmission function, an ultrasonic liquid level meter, a radar liquid level meter, a pressure liquid level transmitter and the like, can record a liquid level value and can perform liquid level control. The second water tank is made of stainless steel with an anticorrosive coating, engineering plastics and cement, the installation height of the second water tank is not lower than the height of the distiller unit group 004, and the volume of the second water tank meets 1-5 times of the daily rated seawater consumption of the system; a second overflow pipe, whose height is usually chosen to be 85-95% of the tank height, is used to prevent conditions of abnormally elevated liquid level; the second liquid level meter comprises a turning plate liquid level meter with a signal transmission function, an ultrasonic liquid level meter, a radar liquid level meter, a pressure liquid level transmitter and the like, can record a liquid level value and can perform liquid level control. The third water tank is made of stainless steel with an anticorrosive coating, engineering plastics and cement, the installation height of the third water tank is lower than that of the distiller unit group 004, and the volume of the third water tank meets 2-7 times of the daily rated seawater consumption of the system; a third overflow pipe is used to prevent the situation of abnormally raised liquid level, the height of which is usually chosen to be 85-95% of the tank height; the third liquid level meter comprises a turning plate liquid level meter with a signal transmission function, an ultrasonic liquid level meter, a radar liquid level meter, a pressure liquid level transmitter and the like, can record a liquid level value and can perform liquid level control.
The rated pressure of the back pressure valve 004-3 is higher than the static pressure difference between the seawater water tank 003 and the distiller 004-4, and the material is high-salt-resistant and anti-corrosion material such as PVC, stainless steel and the like.
The distiller 004-4 is one or more solar seawater desalination distiller(s) of ladder type, pyramid type, cylinder type, light-gathering type or light-following type based on interface evaporation; when the distiller 004-4 is a plurality of solar seawater desalination distiller, the water inlet pipeline and the water outlet pipeline of the plurality of solar seawater desalination distiller are connected in parallel. The distiller 004-4 utilizes solar energy to evaporate seawater and condense the evaporated seawater to obtain fresh water which is discharged to the fresh water tank 005, and the residual concentrated water after evaporation is discharged under the control of the concentrated water outlet electric valve 004-5.
The water pipe used for connection in the system is a UPVC pipe or a stainless steel pipe; the selectable range of the diameters of the water pipes in the distiller unit group 004 according to peak flow is 10-50 mm, and the selectable range of the diameters of the rest water pipes in the system according to the number of the distiller units is 20-200 mm.
The solar seawater desalination system also comprises a control system; the control system includes: the system comprises a sunlight irradiation instrument, an industrial controller, a PLC control cabinet, an engineer station, corresponding software and a control strategy.
Example 2:
in the solar seawater desalination system, a seawater source 000 is produced water after seawater raw water passes through a microfiltration device, the turbidity (NTU) is 0.17, the salt concentration is 3%, and the Chemical Oxygen Demand (COD) is 13 mg/L.
The seawater buffer tank 001 comprises a first water tank, a ball float valve, a first overflow pipe and a first liquid level meter. The first water tank is placed on a 0m layer and is made of stainless steel with an anticorrosive coating, and the volume of the first water tank is 3m 3; the closing liquid level of the ball float valve is 1.4m, the opening liquid level is 0.4m, the height of the first overflow pipe is 1.8m, and the first liquid level meter is an ultrasonic liquid level meter with a signal transmission function.
The seawater lift pump 002 is made of stainless steel, has a lift of 19m and a flow rate of 80L/min.
The seawater tank 003 includes a second tank, a second overflow pipe, and a second level gauge. The second water tank is placed on the roof, is 13m high, is made of stainless steel with an anticorrosive coating and has the volume of 2m 3; the second overflow pipe is 0.9m high, and the second liquid level meter is an ultrasonic liquid level meter with a signal transmission function.
The distiller unit group 004 comprises 14 solar distiller units which can independently desalt seawater, the rated daily seawater consumption of the system is 1t/day, and the daily fresh water yield is 300 kg/day. The solar distiller unit comprises a metering pump front electric valve 004-1, a metering pump 004-2, a back pressure valve 004-3, a distiller 004-4 and a concentrated water outlet electric valve 004-5.
The electric valve 004-1 in front of the metering pump and the electric valve 004-5 at the outlet of the concentrated water are electric ball valves made of PVC, and the opening and closing of the electric ball valves can be controlled by a controller.
The metering pump 004-2 is made of polypropylene, can be controlled to start and stop by a controller, has a suction stroke of 2m and a flow rate of 0-100L/h, and can be manually adjusted.
The back pressure valve 004-3 is made of PVC material and has a rated pressure of 1 MPa.
Distiller 004-4 comprises one or more solar seawater desalination distiller(s) of ladder type, pyramid type, cylinder type, light-gathering type and light-following type based on interface evaporation, and water inlet and outlet pipelines among a plurality of distiller are connected in parallel. The distiller 004-4 utilizes solar energy to evaporate seawater and condense the evaporated seawater to obtain fresh water which is discharged to the fresh water tank 005, and the residual concentrated water after evaporation is discharged under the control of the concentrated water outlet electric valve 004-5.
The fresh water tank 005 includes a third water tank, a third overflow pipe, and a third level gauge. The third water tank is placed on the 0m layer and is made of stainless steel with an anticorrosive coating, and the volume of the third water tank is 1m 3; the third overflow pipe is 0.8m high, and the third liquid level meter is an ultrasonic liquid level meter with a signal transmission function.
The water pipe connected in the solar seawater desalination system is a UPVC pipe, the diameter of the main pipe is 32mm, and the diameter of the pipe material in the distiller unit group 004 is 15 mm.
By adopting the solar seawater desalination system, under the sunshine irradiation condition that the environment temperature is 12-20 ℃ and the equivalent standard sunshine hours is 5 hours in spring of coastal cities in south China, the total amount of produced water of fresh water is 3.5kg/m2 day, and the efficiency is about 47%.
Claims (7)
1. A solar seawater desalination system, comprising: the seawater desalination device comprises a seawater source (000), a seawater buffer tank (001), a seawater lifting pump (002), a seawater tank (003), a distiller unit group (004) and a fresh water tank (005);
wherein, the seawater source (000) is connected with the inlet of the seawater buffer tank (001), and the outlet of the seawater buffer tank (001) is connected with the inlet of the seawater lift pump (002); the outlet of the seawater lift pump (002) is connected to the inlet of the seawater tank (003); the outlet of the seawater tank (003) is connected to the inlet of the distiller unit group (004); the outlet of the distiller unit group (004) comprises a fresh water outlet and a concentrated water outlet, the fresh water outlet is connected to the fresh water tank (005), and the concentrated water outlet is connected to a sewage discharge place.
2. Solar seawater desalination system according to claim 1, wherein the distiller unit group (004) comprises at least one distiller unit comprising: an electric valve (004-1) in front of the metering pump, a metering pump (004-2), a backpressure valve (004-3), a distiller (004-4) and an electric valve (004-5) at a concentrated water outlet;
wherein the outlet of the seawater water tank (003) is communicated with the front electric valve (004-1) of the metering pump of each distiller unit, the front electric valve (004-1) of the metering pump, the metering pump (004-2) and the back pressure valve (004-3) are connected with the distiller (004-4) in series, the outlet of the distiller (004-4) for generating fresh water is connected to the fresh water tank (005), and the outlet of the distiller (004-4) for generating concentrated water is connected with the electric valve (004-5) of the concentrated water outlet in series and connected to sewage discharge; the still units in the still unit group (004) are connected to each other in parallel.
3. The solar seawater desalination system of claim 1, wherein the seawater buffer tank (001) comprises a first water tank, a ball float valve, a first overflow pipe, and a first liquid level meter; the seawater tank (003) comprises a second tank, a second overflow pipe and a second liquid level meter; the fresh water tank (005) includes a third water tank, a third overflow pipe, and a third liquid level meter.
4. Solar seawater desalination system according to claim 2, wherein the rated pressure of the back pressure valve (004-3) is higher than the static pressure difference between the seawater tank (003) and the distiller (004-4).
5. The solar seawater desalination system of claim 2, wherein the distiller (004-4) is one or more solar seawater desalination distiller of ladder, pyramid, cylinder, concentration or chaser type based on interfacial evaporation; when the distiller (004-4) is a plurality of solar seawater desalination distillers, the water inlet pipelines and the water outlet pipelines of the plurality of solar seawater desalination distillers are connected in parallel.
6. The solar seawater desalination system of claim 1, wherein the water pipes for connection in the system are UPVC pipes or stainless steel pipes; the diameter range of the water pipe in the distiller unit group (004) is 10-50 mm, and the diameter range of the rest water pipes in the system is 20-200 mm.
7. The solar seawater desalination system of claim 1, further comprising a control system; the control system includes: the system comprises a sunlight irradiation instrument, an industrial controller, a PLC control cabinet, an engineer station, corresponding software and a control strategy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220780517.7U CN217077040U (en) | 2022-03-31 | 2022-03-31 | Solar seawater desalination system |
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| CN202220780517.7U CN217077040U (en) | 2022-03-31 | 2022-03-31 | Solar seawater desalination system |
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