CN104961194A - Reverse osmosis desalination system energy recovery and recycle device and use method thereof - Google Patents
Reverse osmosis desalination system energy recovery and recycle device and use method thereof Download PDFInfo
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- CN104961194A CN104961194A CN201510296468.4A CN201510296468A CN104961194A CN 104961194 A CN104961194 A CN 104961194A CN 201510296468 A CN201510296468 A CN 201510296468A CN 104961194 A CN104961194 A CN 104961194A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The invention discloses a reverse osmosis desalination system energy recovery and recycle device and a use method thereof. The device mainly comprises a low pressure raw water inlet, a first liquid inlet valve, a high pressure air pump, a pressurization cavity, a first liquid level sensor, a second liquid level sensor, a first cavity, a first dual driving gas-driven supercharger, a second cavity, a third liquid level sensor, a second liquid inlet valve, a third liquid inlet valve, a forth liquid level sensor, a third cavity, a second dual driving gas-driven supercharger, a forth cavity, a fifth liquid level sensor, a first drain valve, a second drain valve, a three-position four-way directional control valve, a low-pressure concentrated water discharge opening, a high pressure concentrated water inlet, a high pressure raw water outlet and a compression gauge. The device has a long service life, improves system reliability, reduces impact of reversion, improves system stability, reduces system energy consumption, realizes monitoring of a device working state at any time and reduces a cost.
Description
Technical field the present invention relates to seawater or brackish water desalting field.
Background technology reverse osmosis desalination technology, as one of the important means of seawater/brackish water desalting, plays extremely important effect to the Economic development in coastland and shortage of fresh water area, inland.But in the application process of reverse osmosis desalination technology, energy consumption accounts for greatly about 30% of water total cost processed in running cost, to effectively reduce energy consumption, suitable energy recycle device is adopted to be very necessary.
The operating pressure of impervious desalination system is between 5.8 ~ 8.0MPa, and the strong brine produced still has very high pressure, usually between 5.5 ~ 6.0Mpa.If reclaimed by this part energy and change into into water energy, significantly will reduce energy consumption, and then reduce water producing cost, the strong brine discharge after step-down is simultaneously safer.
At present, energy recycle device mainly can be divided into turbine type and Work-exchange type two type according to principle of work.Turbine type energy recycle device mainly contains hydraulic turbine formula, usually need through " pressure energy-mechanical energy-pressure energy " twice conversion, the mode of the former water of high-pressure thick water direct supercharging charging that Work-exchange type energy recovery device utilizes reverse osmosis system to discharge carrys out recovered energy, energy recovery efficiency can reach more than 90%, different according to its flow mode, rotor-type pressure exchanger and plunger valve governor pressure interchanger two class can be subdivided into again.Rotor-type pressure exchanger adopts rotary cylinder-block valve plate distribution without piston structure, its structure simple but have 25% ooze mixed.Plunger valve governor pressure interchanger adopts stationary housing to have the Flat valve structure of piston, the former water that need be equipped with the preliminary boosting of topping-up pump lifting enters reverse osmosis system, and the parts such as topping-up pump, cylinder body and piston need to adopt not only corrosion-resistant but also wear-resisting noble metal material making.
At present, they remain weak point be: (1) turbine type energy recycle device, add mechanical energy loss, energy recovery efficiency is on the low side.(2) rotor-type pressure exchanger, exists because strong brine causes into the former salinity water increase of film to former seepage and causes the problem that desalination energy consumption additionally increases; And need independently topping-up pump, can reduce overall efficiency, cost compare is high; In addition, it is large that rotor rotates sharp ear-piercing, noise, once enter bubble, impurity etc. in rotor, is just very easy to be damaged, poor reliability.(3) plunger valve governor pressure interchanger, difficulty of processing is large, and also very high to seal request, and depend on import at present, cost is very high; Even if some has the Flat valve structure of piston to carry out the plunger valve governor pressure interchanger of Curve guide impeller without the need to arranging topping-up pump again based on stationary housing, efficiency is improved, but there is the problem of controlling organization more complicated.
Summary of the invention the object of this invention is to provide the loss of a kind of reduction mechanical energy, and energy recovery efficiency is high, and overall efficiency is high, cost compare is low, and noise is little, is not easily damaged, reliability is strong, the impervious desalination system energy recycling device that difficulty of processing is little and using method.
The impervious desalination system energy recycling device possessing function of increasing pressure of the present invention, mainly comprise: low pressure original water inlet, first liquid feed valve, high-pressure pump, pressurized cavity, first liquid level sensor, second liquid level sensor, first cavity, first Dual Drive gas drive supercharging blower, second cavity, 3rd liquid level sensor, second liquid feed valve, 3rd liquid feed valve, 4th liquid level sensor, 3rd cavity, second Dual Drive gas drive supercharging blower, 4th cavity, 5th liquid level sensor, first tapping valve, second tapping valve, three position four-way directional control valve, low-press thick water outlet, high-pressure thick water inlet, the former water out of high pressure and tensimeter.
In impervious desalination system energy recycling device of the present invention, former water inlet one end is connected with one end of low pressure raw water pump, the other end of low pressure raw water pump is connected with one end of low pressure original water inlet, and the other end of low pressure original water inlet is connected with the 3rd liquid feed valve with the first liquid feed valve, the second liquid feed valve respectively.One end of first liquid feed valve is connected with one end of low pressure original water inlet, and the other end of the first liquid feed valve is connected with pressurized cavity.The top of pressurized cavity is provided with high-pressure pump, and the inside of pressurized cavity is equipped with the first liquid level sensor, and the bottom of pressurized cavity is connected with one end of the former water out of high pressure, and the former water out of high pressure is provided with tensimeter.The other end of the former water out of high pressure is connected with one end of reverse osmosis membrane group, and the another two ends of reverse osmosis membrane group connect one end of water outlet and high-pressure thick water inlet respectively.The other end of high-pressure thick water inlet is connected with the fluid inlet P mouth of three position four-way directional control valve, the working hole A mouth of three position four-way directional control valve is connected with the bottom of the first cavity, first inside cavity is equipped with the second liquid level sensor, the top of the first cavity is connected with one end of the first Dual Drive gas drive supercharging blower, the other end of the first Dual Drive gas drive supercharging blower is connected with the top of the second cavity, second inside cavity is equipped with the 3rd liquid level sensor, and the middle and upper part of the second cavity is connected with the second liquid feed valve.The bottom of the second cavity is connected with one end of the first tapping valve, and the other end of the first tapping valve is connected with pressurized cavity one end with the second tapping valve respectively, and the other end of the second tapping valve is connected with the bottom of the 3rd cavity.The lower end of the 3rd liquid feed valve is connected with the 3rd cavity, is equipped with the 4th liquid level sensor in the 3rd inside cavity.The top of the 3rd cavity is connected with one end of the second Dual Drive gas drive supercharging blower, the other end of the second Dual Drive gas drive supercharging blower is connected with the 4th cavity, the inside of the 4th cavity is equipped with the 5th liquid level sensor, the bottom of the 4th cavity is connected with the working hole B mouth of three position four-way directional control valve, and the liquid return hole T mouth of three position four-way directional control valve is connected with low-press thick water outlet.The control mouth of three position four-way directional control valve is connected with controller.
The using method of impervious desalination system energy recycling device of the present invention is as follows:
(1) three position four-way directional control valve is adjusted to position one (left position) by controller, and the first cavity and high-pressure thick water inlet are connected, and the 4th cavity and low-press thick water outlet are connected;
(2) need the former water carrying out desalinating process to enter desalination system through former water inlet, and once pressurizeed by low pressure raw water pump, the former moisture once after pressurization is two-way: a road enters pressurized cavity, and another road enters the second cavity or the 3rd cavity;
(3) the former water of once pressurization entering pressurized cavity, by entering reverse osmosis membrane group after secondary pressurized, discharges low pressure fresh water and high-pressure thick water after reverse osmosis membrane filtration;
(4) do not enter in first cavity through high-pressure thick water inlet by three position four-way directional control valve through the high-pressure thick water of reverse osmosis membrane, the rare gas element promoting the first inside cavity storage flows after the first Dual Drive gas drive charger boost in the second cavity, make the former water supercharging of the once pressurization in the second cavity and enter pressurized cavity by the first tapping valve, after again pressurizeing in pressurized cavity, entering reverse osmosis membrane group;
(5) the former water of once pressurization simultaneously, through the pressurization of low pressure raw water pump enters in the 3rd cavity by the 3rd liquid feed valve; 3rd inside cavity store rare gas element flow in the 4th cavity after the second Dual Drive gas drive charger boost, in the 4th cavity relief pressure low-press thick water release; Until the liquid level that the liquid level in the 3rd cavity arrives in the liquid level upper limit or the 4th cavity arrives liquid level lower limit;
(6) when the liquid level arrived in the liquid level upper limit or the second cavity when the liquid level in the first cavity arrives liquid level lower limit, the 3rd liquid level sensor in the second liquid level sensor in first cavity or the second cavity sends control signal, electric control system drives three position four-way directional control valve to commutate to position two (right position) by controller, first cavity and low-press thick water outlet are connected, and the 4th cavity and high-pressure thick water inlet are connected;
(7) enter four cavity through high-pressure thick water inlet by three position four-way directional control valve from reverse osmosis membrane group high-pressure thick water out, the rare gas element promoting the 4th inside cavity storage flows after the second Dual Drive gas drive charger boost in the 3rd cavity, make the former water supercharging of the once pressurization in the 3rd cavity and enter pressurized cavity by the second tapping valve, after again pressurizeing in pressurized cavity, entering reverse osmosis membrane group;
(8) the former water of once pressurization simultaneously, through the pressurization of low pressure raw water pump enters in the second cavity by the second liquid feed valve; Second inside cavity store rare gas element flow in the first cavity after the first Dual Drive gas drive charger boost, in the first cavity relief pressure low-press thick water release; Until the liquid level that the liquid level in the second cavity arrives in the liquid level upper limit or the first cavity arrives liquid level lower limit;
(9) when the liquid level arrived in the liquid level upper limit or the 3rd cavity when the liquid level in the 4th cavity arrives liquid level lower limit, the 5th liquid level sensor in 4th cavity or the 4th liquid level sensor in the 3rd cavity send control signal, and electric control system drives three position four-way directional control valve again to commutate to position one (left position) by controller;
(10) this Posterior circle carries out step (1) to step (9), thus realizes position one and position two alternation, reaches the object of continuous pressure and overbottom pressure energy recovery recycling.
The present invention compared with prior art tool has the following advantages:
(1) eliminate the high-pressure undersea water pump that failure rate is higher, the life-span is shorter in the present invention, the high-pressure pump failure rate is low of employing, work-ing life is also long, improves the reliability of system;
(2) three position four-way directional control valve that the present invention adopts has commutation dash adjustment function and meta transition function, can reduce reversing impact;
(3) rare gas element of certain pressure is all filled with in working cavity of the present invention, energy storage function can be realized, the compression shock caused due to high-low pressure conversion when can reduce pressure-exchange and fluctuation, thus protection reverse osmosis membrane group, improve the stationarity of system;
(4) adopt Dual Drive gas drive supercharging blower to carry out supercharging between working cavity of the present invention, the former water pressure after supercharging, much larger than high-pressure thick water pressure, does not need topping-up pump supercharging again, improves the efficiency of system, reduce the energy consumption of system;
(5) independent of one another between working cavity of the present invention, efficiently avoid the leakage of strong brine to former water, solve well because strong brine causes into the former salinity water increase of film to former seepage and cause the problem that desalination energy consumption additionally increases;
(6) liquid level sensor is all equipped with in the working cavity inside of apparatus of the present invention, and the former water out place of high pressure is provided with tensimeter, can the working order of monitoring device at any time, to carry out optimization regulation and control to whole equipment;
(7) the present invention adopts gas pressurization principle to carry out supercharging, and the high-pressure pump adopted and Dual Drive gas drive supercharging blower are in the market can the matured product of mass industrialized production, and price is relatively cheap; Meanwhile, the present invention is highly integrated with pressurization and utilizes function with energy recovery, decreases connecting tubes a large amount of in legacy system and valve, reduces pipework and material cost; Reduce the cost of investment of system.
Accompanying drawing explanation
Fig. 1 is the structural representation of supercharging of the present invention and energy recycling device;
Fig. 2 is position one (left position) state graph of supercharging of the present invention and energy recovery Application way;
Fig. 3 is position two (right position) state graph of supercharging of the present invention and energy recovery Application way.
In figure: the former water inlet of 1-, 2-low pressure raw water pump, 3-low pressure original water inlet, 4-first liquid feed valve, 5-second liquid feed valve, 6-the 3rd liquid feed valve, 7-pressurized cavity, 8-high-pressure pump, 9-first liquid level sensor, the former water out of 10-high pressure, 11-tensimeter, 12-reverse osmosis membrane group, 13-water outlet, 14-high-pressure thick water inlet, 15-three position four-way directional control valve, 16-first cavity, 17-second liquid level sensor, 18-first Dual Drive gas drive supercharging blower, 19-second cavity, 20-the 3rd liquid level sensor, 21-first tapping valve, 22-second tapping valve, 23-the 3rd cavity, 24-the 4th liquid level sensor, 25-second Dual Drive gas drive supercharging blower, 26-the 4th cavity, 27-the 5th hydrauliccapsule, 28-low-press thick water outlet, 29-controller.
Embodiment is in the simplified schematic diagram of the present invention of Fig. 1 to Fig. 3, former water inlet 1 one end is connected with one end of low pressure raw water pump 2, the other end of low pressure raw water pump is connected with one end of low pressure original water inlet 3, and the other end of low pressure original water inlet is connected with the 3rd liquid feed valve 6 with the first liquid feed valve 4, second liquid feed valve 5 respectively.One end of first liquid feed valve is connected with one end of low pressure original water inlet, and the other end of the first liquid feed valve is connected with pressurized cavity 7.The top of pressurized cavity is provided with high-pressure pump 8, and the inside of pressurized cavity is equipped with the first liquid level sensor 9, and the bottom of pressurized cavity is connected with one end of the former water out 10 of high pressure, and the former water out of high pressure is provided with tensimeter 11.The other end of the former water out of high pressure is connected with one end of reverse osmosis membrane group 12, and the another two ends of reverse osmosis membrane group connect one end of water outlet 13 and high-pressure thick water inlet 14 respectively.The other end of high-pressure thick water inlet is connected with the fluid inlet P mouth of three position four-way directional control valve 15, the working hole A mouth of three position four-way directional control valve is connected with the bottom of the first cavity 16, first inside cavity is equipped with the second liquid level sensor 17, the top of the first cavity is connected with one end of the first Dual Drive gas drive supercharging blower 18, the other end of the first Dual Drive gas drive supercharging blower is connected with the top of the second cavity 19, the middle and upper part that second inside cavity is equipped with the 3rd liquid level sensor 20, second cavity is connected with the second liquid feed valve.The bottom of the second cavity is connected with one end of the first tapping valve 21, and the other end of the first tapping valve is connected with pressurized cavity one end with the second tapping valve 22 respectively, and the other end of the second tapping valve is connected with the bottom of the 3rd cavity 23.The lower end of the 3rd liquid feed valve is connected with the 3rd cavity, is equipped with the 4th liquid level sensor 24 in the 3rd inside cavity.The top of the 3rd cavity is connected with one end of the second Dual Drive gas drive supercharging blower 25, the other end of the second Dual Drive gas drive supercharging blower is connected with the 4th cavity 26, the inside of the 4th cavity is equipped with the 5th liquid level sensor 27, the bottom of the 4th cavity is connected with the working hole B mouth of three position four-way directional control valve, and the liquid return hole T mouth of three position four-way directional control valve is connected with low-press thick water outlet 28.The control mouth of three position four-way directional control valve is connected with controller 29.
The using method of impervious desalination system energy recycling device is as follows:
(1) three position four-way directional control valve is adjusted to position one (left position) by controller, and the first cavity and high-pressure thick water inlet are connected, and the 4th cavity and low-press thick water outlet are connected;
(2) need the former water carrying out desalinating process to enter desalination system through former water inlet, and once pressurizeed by low pressure raw water pump, the former moisture once after pressurization is two-way: a road enters pressurized cavity, and another road enters the second cavity or the 3rd cavity;
(3) the former water of once pressurization entering pressurized cavity, by entering reverse osmosis membrane group after secondary pressurized, discharges low pressure fresh water and high-pressure thick water after reverse osmosis membrane filtration;
(4) do not enter in first cavity through high-pressure thick water inlet by three position four-way directional control valve through the high-pressure thick water of reverse osmosis membrane, the rare gas element promoting the first inside cavity storage flows after the first Dual Drive gas drive charger boost in the second cavity, make the former water supercharging of the once pressurization in the second cavity and enter pressurized cavity by the first tapping valve, after again pressurizeing in pressurized cavity, entering reverse osmosis membrane group;
(5) the former water of once pressurization simultaneously, through the pressurization of low pressure raw water pump enters in the 3rd cavity by the 3rd liquid feed valve; 3rd inside cavity store rare gas element flow in the 4th cavity after the second Dual Drive gas drive charger boost, in the 4th cavity relief pressure low-press thick water release; Until the liquid level that the liquid level in the 3rd cavity arrives in the liquid level upper limit or the 4th cavity arrives liquid level lower limit;
(6) when the liquid level arrived in the liquid level upper limit or the second cavity when the liquid level in the first cavity arrives liquid level lower limit, the 3rd liquid level sensor in the second liquid level sensor in first cavity or the second cavity sends control signal, electric control system drives three position four-way directional control valve to commutate to position two (right position) by controller, first cavity and low-press thick water outlet are connected, and the 4th cavity and high-pressure thick water inlet are connected;
(7) enter four cavity through high-pressure thick water inlet by three position four-way directional control valve from reverse osmosis membrane group high-pressure thick water out, the rare gas element promoting the 4th inside cavity storage flows after the second Dual Drive gas drive charger boost in the 3rd cavity, make the former water supercharging of the once pressurization in the 3rd cavity and enter pressurized cavity by the second tapping valve, after again pressurizeing in pressurized cavity, entering reverse osmosis membrane group;
(8) the former water of once pressurization simultaneously, through the pressurization of low pressure raw water pump enters in the second cavity by the second liquid feed valve; Second inside cavity store rare gas element flow in the first cavity after the first Dual Drive gas drive charger boost, in the first cavity relief pressure low-press thick water release; Until the liquid level that the liquid level in the second cavity arrives in the liquid level upper limit or the first cavity arrives liquid level lower limit;
(9) when the liquid level arrived in the liquid level upper limit or the 3rd cavity when the liquid level in the 4th cavity arrives liquid level lower limit, the 5th liquid level sensor in 4th cavity or the 4th liquid level sensor in the 3rd cavity send control signal, and electric control system drives three position four-way directional control valve again to commutate to position one (left position) by controller;
(10) this Posterior circle carries out step (1) to step (9), thus realizes position one and position two alternation, reaches the object of continuous pressure and overbottom pressure energy recovery recycling.
Claims (2)
1. an impervious desalination system energy recycling device, mainly comprise low pressure original water inlet, first liquid feed valve, high-pressure pump, pressurized cavity, first liquid level sensor, second liquid level sensor, first cavity, first Dual Drive gas drive supercharging blower, second cavity, 3rd liquid level sensor, second liquid feed valve, 3rd liquid feed valve, 4th liquid level sensor, 3rd cavity, second Dual Drive gas drive supercharging blower, 4th cavity, 5th liquid level sensor, first tapping valve, second tapping valve, three position four-way directional control valve, low-press thick water outlet, high-pressure thick water inlet, the former water out of high pressure and tensimeter, it is characterized in that: former water inlet one end is connected with one end of low pressure raw water pump, the other end of low pressure raw water pump is connected with one end of low pressure original water inlet, the other end of low pressure original water inlet respectively with the first liquid feed valve, second liquid feed valve is connected with the 3rd liquid feed valve, one end of first liquid feed valve is connected with one end of low pressure original water inlet, the other end of the first liquid feed valve is connected with pressurized cavity, the top of pressurized cavity is provided with high-pressure pump, the inside of pressurized cavity is equipped with the first liquid level sensor, the bottom of pressurized cavity is connected with one end of the former water out of high pressure, the former water out of high pressure is provided with tensimeter, the other end of the former water out of high pressure is connected with one end of reverse osmosis membrane group, the another two ends of reverse osmosis membrane group connect one end of water outlet and high-pressure thick water inlet respectively, the other end of high-pressure thick water inlet is connected with the fluid inlet P mouth of three position four-way directional control valve, the working hole A mouth of three position four-way directional control valve is connected with the bottom of the first cavity, first inside cavity is equipped with the second liquid level sensor, the top of the first cavity is connected with one end of the first Dual Drive gas drive supercharging blower, the other end of the first Dual Drive gas drive supercharging blower is connected with the top of the second cavity, second inside cavity is equipped with the 3rd liquid level sensor, the middle and upper part of the second cavity is connected with the second liquid feed valve, the bottom of the second cavity is connected with one end of the first tapping valve, the other end of the first tapping valve is connected with pressurized cavity one end with the second tapping valve respectively, the other end of the second tapping valve is connected with the bottom of the 3rd cavity, the lower end of the 3rd liquid feed valve is connected with the 3rd cavity, the 4th liquid level sensor is equipped with in the 3rd inside cavity, the top of the 3rd cavity is connected with one end of the second Dual Drive gas drive supercharging blower, the other end of the second Dual Drive gas drive supercharging blower is connected with the 4th cavity, the inside of the 4th cavity is equipped with the 5th liquid level sensor, the bottom of the 4th cavity is connected with the working hole B mouth of three position four-way directional control valve, the liquid return hole T mouth of three position four-way directional control valve is connected with low-press thick water outlet, the control mouth of three position four-way directional control valve is connected with controller.
2. the using method of a kind of impervious desalination system energy recycling device of claim 1, is characterized in that:
(1) three position four-way directional control valve is adjusted to position one (left position) by controller, and the first cavity and high-pressure thick water inlet are connected, and the 4th cavity and low-press thick water outlet are connected;
(2) need the former water carrying out desalinating process to enter desalination system through former water inlet, and once pressurizeed by low pressure raw water pump, the former moisture once after pressurization is two-way: a road enters pressurized cavity, and another road enters the second cavity or the 3rd cavity;
(3) the former water of once pressurization entering pressurized cavity, by entering reverse osmosis membrane group after secondary pressurized, discharges low pressure fresh water and high-pressure thick water after reverse osmosis membrane filtration;
(4) do not enter in first cavity through high-pressure thick water inlet by three position four-way directional control valve through the high-pressure thick water of reverse osmosis membrane, the rare gas element promoting the first inside cavity storage flows after the first Dual Drive gas drive charger boost in the second cavity, make the former water supercharging of the once pressurization in the second cavity and enter pressurized cavity by the first tapping valve, after again pressurizeing in pressurized cavity, entering reverse osmosis membrane group;
(5) the former water of once pressurization simultaneously, through the pressurization of low pressure raw water pump enters in the 3rd cavity by the 3rd liquid feed valve; 3rd inside cavity store rare gas element flow in the 4th cavity after the second Dual Drive gas drive charger boost, in the 4th cavity relief pressure low-press thick water release; Until the liquid level that the liquid level in the 3rd cavity arrives in the liquid level upper limit or the 4th cavity arrives liquid level lower limit;
(6) when the liquid level arrived in the liquid level upper limit or the second cavity when the liquid level in the first cavity arrives liquid level lower limit, the 3rd liquid level sensor in the second liquid level sensor in first cavity or the second cavity sends control signal, electric control system drives three position four-way directional control valve to commutate to position two (right position) by controller, first cavity and low-press thick water outlet are connected, and the 4th cavity and high-pressure thick water inlet are connected;
(7) enter four cavity through high-pressure thick water inlet by three position four-way directional control valve from reverse osmosis membrane group high-pressure thick water out, the rare gas element promoting the 4th inside cavity storage flows after the second Dual Drive gas drive charger boost in the 3rd cavity, make the former water supercharging of the once pressurization in the 3rd cavity and enter pressurized cavity by the second tapping valve, after again pressurizeing in pressurized cavity, entering reverse osmosis membrane group;
(8) the former water of once pressurization simultaneously, through the pressurization of low pressure raw water pump enters in the second cavity by the second liquid feed valve; Second inside cavity store rare gas element flow in the first cavity after the first Dual Drive gas drive charger boost, in the first cavity relief pressure low-press thick water release; Until the liquid level that the liquid level in the second cavity arrives in the liquid level upper limit or the first cavity arrives liquid level lower limit;
(9) when the liquid level arrived in the liquid level upper limit or the 3rd cavity when the liquid level in the 4th cavity arrives liquid level lower limit, the 5th liquid level sensor in 4th cavity or the 4th liquid level sensor in the 3rd cavity send control signal, and electric control system drives three position four-way directional control valve again to commutate to position one (left position) by controller;
(10) this Posterior circle carries out step (1) to step (9), thus realizes position one and position two alternation, reaches the object of continuous pressure and overbottom pressure energy recovery recycling.
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| CN106582290A (en) * | 2016-12-02 | 2017-04-26 | 燕山大学 | Heat expansion and cold contraction type pressure energy recovery device and method of reverse osmosis system |
| CN108375996A (en) * | 2017-12-28 | 2018-08-07 | 乾通环境科技(苏州)有限公司 | A kind of controller of the small-sized Integrated automation sea water desalting equipment of remote control |
| CN108375996B (en) * | 2017-12-28 | 2020-12-22 | 乾通环境科技(苏州)有限公司 | Remote control's small-size full integrated automation seawater desalination equipment's controller |
| CN111634975A (en) * | 2020-06-02 | 2020-09-08 | 上海瑜科环境工程有限公司 | Energy-saving seawater desalination process |
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