CN103230745A - Differential pressure booster-type energy recovery device based on reverse osmosis system - Google Patents
Differential pressure booster-type energy recovery device based on reverse osmosis system Download PDFInfo
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Abstract
The invention provides a differential pressure booster-type energy recovery device based on a reverse osmosis system. The differential pressure booster-type energy recovery device comprises a two-position four-way reversing valve, a first hydraulic cylinder and a second hydraulic cylinder, wherein the first hydraulic cylinder is provided with a piston and a piston rod of the first hydraulic cylinder; and the second hydraulic cylinder is provided with a piston and a piston rod of the second hydraulic cylinder. The device has high energy recovery efficiency; a high pressure booster pump is not required, and the pressure of low-pressure raw material water can be directly boosted to a water inlet pressure of the reverse osmosis system by utilizing the recovered energy, so that stable pressure energy conversion is realized and the equipment investment and equipment selection difficulty are reduced; and simultaneously, the water yield of the reverse osmosis system utilizing the differential pressure booster-type energy recovery device can be changed by adjusting the flow of a high pressure pump or the flow of the energy recovery device.
Description
Technical field
The present invention relates to the energy recycle device in the fluid system.
Background technology
Research for fluid pressure energy comprehensive utilization technique and equipment has both at home and abroad had very big development, has developed numerous multi-form devices.Some devices have wherein become the industrialization commodity, be applied on the corresponding industrial circle, and obtained good economic benefits, this for enterprise's energy savings, reducing cost is very helpful.
Pressure fluid total energy approach equipment mainly is divided into two big classes:
One class is that the high-low pressure fluid transmits energy by impeller and main shaft, i.e. the intermediate link of transmitting as the fluid pressure energy with mechanical energy.Typical device comprises counter-rotating pump type (Francis Pump), Pei Erdun turbine (Pelton Whee1) and hydraulic turbine (Turbo Charger).Though this type of energy recycle device technology comparative maturity, but because the deficiency on the principle, be converted into the pressure energy again after namely must earlier pressure being converted into mechanical energy, in conversion process, there is energy loss inevitably, therefore the space of further raising the efficiency on existing basis is very limited, and its energy recovery efficiency is about 30 ~ 70%.
Early 1990s, the fluid pressure energy recovery technology that another kind of efficient is higher---function (pressure) interchanger develops rapidly, the structure of function (pressure) interchanger is very simple, high-pressure fluid is the low-pressure fluid pressurization by the transfer function of piston (comprising that with high and low pressure mixing fluid column be piston), if ignore the factors such as friction of piston, energy transfer efficiency can reach 100% in theory; And in fact the organic efficiency of merit interchanger can reach more than 90%, is used in numerous process industrials field in recent years.According to the structure difference, pressure exchanger can be divided into valve current allocating type function (pressure) interchanger again and coil two kinds of oil-allocation type function (pressure) interchangers.Typical valve current allocating type function (pressure) interchanger representative products has the isobaric piston type function interchanger (Work Exchanger) of Switzerland Calder company; The typical representative of typical dish oil-allocation type function (pressure) interchanger has the rotational pressure interchanger (Pressure Exchanger) of U.S. ERI company.
Conventional desalination process is divided into two tunnel, one route high-pressure pump through the qualified seawater of preliminary treatment and directly boosts to desalinization nominal operation pressure (as 5.5MPa); Another road is through energy recycle device (isobaric exchange) obtains dense water overbottom pressure energy by pressure-exchange after (as 5.3MPa), be pressurized to desalinization nominal operation pressure (about 5.5MPa) through high-pressure booster again, enter reverse osmosis membrane assembly after converging with last road high pressure sea water.And the high-pressure booster manufacturing cost approaches with high-pressure pump, and especially low discharge high-pressure booster price is very expensive.
Summary of the invention
Technical problem to be solved by this invention provides a kind of differential pressure pressurization formula energy recycle device based on counter-infiltration system, do not need high-pressure booster, the energy that can utilize recovery directly with the boost in pressure of the low pressure raw water intake pressure to counter-infiltration system, realizes that the pressure stable energy exchange also reduces equipment investment and the lectotype selection difficulty.For this reason, the present invention is by the following technical solutions:
It comprises: two-position four way change valve, first hydraulic cylinder, second hydraulic cylinder; First hydraulic cylinder has piston and the piston rod of first hydraulic cylinder, and second hydraulic cylinder has piston and the piston rod of second hydraulic cylinder; Described differential pressure pressurization formula energy recycle device also has the first flow check valve that outlet links to each other with the first hydraulic cylinder rod chamber and import links to each other with the import of low pressure raw material mouth, the second flow check valve that outlet links to each other with the second hydraulic cylinder rod chamber and import links to each other with the import of low pressure raw material mouth, the 3rd flow check valve that import links to each other with the first hydraulic cylinder rod chamber and outlet links to each other with high pressure feedstock water outlet, the 4th flow check valve that import links to each other with the second hydraulic cylinder rod chamber and outlet links to each other with high pressure feedstock water outlet; First port of two-position four way change valve communicates with the first hydraulic cylinder rodless cavity, second port communicates with the second hydraulic cylinder rodless cavity, the 3rd port communicates with the high-pressure thick water inlet, the 4th port communicates with the low-press thick water outlet, and described differential pressure pressurization formula energy recycle device also has first control valve that is located on the high-pressure thick water pipe, is located at second control valve on the low pressure raw water pipeline;
Enter the high-pressure thick discharge of energy recycle device high-pressure thick water inlet greater than the high pressure feedstock discharge of discharging from energy recycle device high pressure feedstock water outlet, and the ratio of the high-pressure thick discharge that enters and the high pressure feedstock discharge of discharge equals the net sectional area of the first hydraulic cylinder rod chamber and the ratio of the first hydraulic cylinder rodless cavity, also equals the net sectional area of the second hydraulic cylinder rod chamber and the ratio of the second hydraulic cylinder rodless cavity;
Described first control valve and second control valve be used for to be regulated flow makes two-position four way change valve commutate by the regular hour, and this time is the first hydraulic cylinder rodless cavity maximum volume divided by the merchant of the flow value of the high-pressure thick water inlet that enters energy recycle device or the second hydraulic cylinder rodless cavity maximum volume merchant divided by the flow value of the high-pressure thick water inlet that enters energy recycle device;
The high pressure feedstock water pressure at described high pressure feedstock water outlet place reaches the intake pressure of counter-infiltration membrane stack.
Because adopt technical scheme of the present invention, the useful effect that the present invention specifically has is:
The present invention needs intermediate conversion to become the pressure energy use device of mechanical energy to have higher energy recovery efficiency compared with counter-rotating pump type (Francis Pump), Pei Erdun turbine (Pelton Whee1) with hydraulic turbine (Turbo Charger) and so on.
Use counter-infiltration system of the present invention compared with the counter-infiltration system of isobaric pressure-exchange recuperator, do not need to use high-pressure booster to come for obtaining the further supercharging of high pressure feedstock water of energy, utilize the energy that reclaims directly the boost in pressure of low pressure raw water to be arrived the intake pressure of counter-infiltration system, realize that the pressure stable energy exchange also reduces equipment investment and the lectotype selection difficulty.
And, use the producing water ratio of counter-infiltration system of the present invention to change by regulating high-pressure pump flow or energy recycle device flow, and application class was fixed like the producing water ratio of the counter-infiltration system of differential pressure type structural energy retracting device in the past, and was unadjustable in the running.In the present invention, first control valve is septum valve: be mainly used in controlling the concentrated stream amount, just the regulating system rate of recovery; Second control valve is low pressure modulating valve: be mainly used in regulating the low pressure flow of inlet water, energy recycle device mesolow flow of inlet water and high pressure feedstock discharge are adapted, general low pressure flow of inlet water is slightly larger than high pressure feedstock discharge.
Description of drawings
Fig. 1 is schematic diagram provided by the present invention, has shown principle of the present invention.
The specific embodiment
With reference to accompanying drawing.Differential pressure pressurization formula energy recycle device 60 provided by the present invention comprises: two-position four way change valve 3, first hydraulic cylinder 1, second hydraulic cylinder 2; First hydraulic cylinder 1 has the piston of first hydraulic cylinder 1 and piston and the piston rod 21 that piston rod 11, the second hydraulic cylinders 2 have second hydraulic cylinder 2; Described differential pressure pressurization formula energy recycle device also has the first flow check valve 4 that outlet links to each other with first hydraulic cylinder, 1 rod chamber A1 and import links to each other with low pressure raw material mouth import P1, the second flow check valve 6 that outlet links to each other with second hydraulic cylinder, 2 rod chamber B1 and import links to each other with low pressure raw material mouth import P1, import and the 3rd flow check valve 5 that first hydraulic cylinder, 1 rod chamber A1 links to each other and outlet links to each other with high pressure feedstock water outlet P4, the 4th flow check valve 7 that import links to each other with second hydraulic cylinder, 2 rod chamber B1 and outlet links to each other with high pressure feedstock water outlet P4; First port 33 of two-position four way change valve 3 communicates with first hydraulic cylinder, 1 rodless cavity A2, second port 34 communicates with second hydraulic cylinder, 2 rodless cavity B2, the 3rd port 31 communicates with high-pressure thick water inlet P3, the 4th port 32 communicates with low-press thick water outlet P2, and described differential pressure pressurization formula energy recycle device also has first control valve 9 that is located on the high-pressure thick water pipe, is located at second control valve 8 on the low pressure raw water pipeline;
Enter the high-pressure thick discharge of energy recycle device high-pressure thick water inlet P3 greater than the high pressure feedstock discharge of discharging from energy recycle device high pressure feedstock water outlet P4, and the ratio of the high-pressure thick discharge that enters and the high pressure feedstock discharge of discharge equals the net sectional area of first hydraulic cylinder, 1 rod chamber A1 and the ratio of first hydraulic cylinder, 1 rodless cavity A2, and the ratio of the net sectional area of second hydraulic cylinder, 2 rod chamber B1 and second hydraulic cylinder, 2 rodless cavity B2 equals the sectional area of first hydraulic cylinder, 1 rod chamber A1 and the ratio of first hydraulic cylinder, 1 rodless cavity A2; Described rod chamber net sectional area refers to: the rodless cavity sectional area deducts the area of the piston rod sectional area in the rod chamber.
Described first control valve 9 and second control valve 8 are used for regulating flow makes two-position four way change valve 3 by the regular hour commutation, and this time is first hydraulic cylinder, 1 rodless cavity A2 maximum volume divided by the merchant of the flow value of the high-pressure thick water inlet P3 that enters energy recycle device or second hydraulic cylinder, the 2 rodless cavity B2 maximum volumes merchant divided by the flow value of the high-pressure thick water inlet P3 that enters energy recycle device;
The high pressure feedstock water pressure at described high pressure feedstock water outlet P4 place reaches the intake pressure of counter-infiltration membrane stack 50.
Commutate by the regular hour by two-position four way change valve 3, energy recycle device 60 work have two kinds of states, a kind of state is that position, two-position four-way valve 3 left side is when logical, high-pressure thick water is imported into first hydraulic cylinder, 1 rodless cavity A2 and promotes piston and piston rod 11 and the raw water of first hydraulic cylinder, 1 rod chamber A1 is discharged by high pressure feedstock water out P4 with the state of high pressure from the 3rd flow check valve 5 enter counter-infiltration membrane stack 50, and the low pressure raw water enters by the second flow check valve 6 from the P1 mouth that second hydraulic cylinder, 2 rod chamber B1 promote piston and piston rod 21 is discharged the reverse osmosis concentrated water of second hydraulic cylinder, 2 rod chamber B1 with the state of low pressure simultaneously; To be two-position four-way valve 3 commutations be right position when logical to another kind of state, high-pressure thick water is imported into second hydraulic cylinder, 2 rodless cavity B2 and promotes piston and piston rod 21 and the raw water of second hydraulic cylinder, 2 rod chamber B1 is discharged by high pressure feedstock water out P4 with the state of high pressure from the 4th flow check valve 7 enter counter-infiltration membrane stack 50, and the low pressure raw water enters by the first flow check valve 4 from the P1 mouth that first hydraulic cylinder, 1 rod chamber A1 promotes piston and piston rod 11 is discharged the reverse osmosis concentrated water of first hydraulic cylinder, 1 rod chamber A1 with the state of low pressure simultaneously.
As shown in Figure 1, the saturating desalination system of seawater reverse osmosis of having used a kind of differential pressure pressurization formula energy recycle device based on counter-infiltration system of the present invention is made up of raw material tank 10, low-lift pump 20, filter 30, high-pressure pump 40, reverse osmosis membrane membrane stack 50 and differential pressure pressurization formula energy recycle device 60 of the present invention and connecting pipe; Low pressure raw material moisture after filter 30 is handled is two-way, one the tunnel boosts to the nominal operation pressure of reverse osmosis membrane membrane stack 50 through high-pressure pump, another road connects second control valve 8, boost to the nominal operation pressure of reverse osmosis membrane membrane stack 50 through differential pressure pressurization formula energy recycle device 60, described two-way compiles the back as the water inlet of reverse osmosis membrane membrane stack 50.
Its operating procedure is as follows: at first start low-lift pump 20, it is exerted oneself and is 100m
3/ h * 0.2MPa, the supercharging of raw water seawater is to enter high-pressure pump 40 and differential pressure pressurization formula energy recycle device 60 after the filter 30 of 20um filters through precision, start high-pressure pump 40 and differential pressure pressurization formula energy recycle device 60(startup energy recycle device 60 then simultaneously and namely start two-position four-way valve 3), high-pressure pump is exerted oneself and is 48m
3/ h * 6.0MPa, differential pressure pressurization formula energy recycle device 60 accept high-pressure thick water 60 m that reverse osmosis membrane membrane stack 50 is discharged
3/ h * 5.8MPa accepts low pressure raw water 52 m that low-lift pump 20 is carried
3/ h * 0.2MPa, output high pressure feedstock water 52 m
3/ h * 6.0MPa, output low-press thick water 60 m
3/ h * 0.05MPa, engineering is used the energy recovery efficiency about 90% of the dense water of counter-infiltration system.
Its advantage is: specific efficiency is the water turbine formula energy recycle device of 35-70%, and efficient is higher; There is the system of isobaric pressure-exchange formula energy recycle device to need high-pressure booster to compare with application, the two efficient is suitable, but counter-infiltration system collection pressure-exchange and the high pressure supercharging of application achievement of the present invention are one, need not high-pressure booster, use conveniently, cost is lower.
Claims (1)
1. the differential pressure pressurization formula energy recycle device based on counter-infiltration system is characterized in that it comprises: two-position four way change valve (3), first hydraulic cylinder (1), second hydraulic cylinder (2); First hydraulic cylinder (1) has piston and the piston rod (11) of first hydraulic cylinder (1), and second hydraulic cylinder (2) has piston and the piston rod (21) of second hydraulic cylinder (2); Described differential pressure pressurization formula energy recycle device also has the first flow check valve (4) that outlet links to each other with first hydraulic cylinder (1) rod chamber (A1) and import links to each other with low pressure raw material mouth import (P1), the second flow check valve (6) that outlet links to each other with second hydraulic cylinder (2) rod chamber and import links to each other with low pressure raw material mouth import (P1), the 3rd flow check valve (5) that import links to each other with first hydraulic cylinder (1) rod chamber (A1) and outlet links to each other with high pressure feedstock water outlet (P4), the 4th flow check valve (7) that import links to each other with second hydraulic cylinder (2) rod chamber and outlet links to each other with high pressure feedstock water outlet (P4); First port (33) of two-position four way change valve (3) communicates with first hydraulic cylinder (1) rodless cavity (A2), second port (34) communicates with second hydraulic cylinder (2) rodless cavity (B2), the 3rd port (31) communicates with high-pressure thick water inlet (P3), the 4th port (32) communicates with low-press thick water outlet (P2), and described differential pressure pressurization formula energy recycle device also has first control valve (9) that is located on the high-pressure thick water pipe, is located at second control valve (8) on the low pressure raw water pipeline;
Enter the high-pressure thick discharge of energy recycle device high-pressure thick water inlet (P3) greater than the high pressure feedstock discharge of discharging from energy recycle device high pressure feedstock water outlet (P4), and the ratio of the high-pressure thick discharge that enters and the high pressure feedstock discharge of discharge equals the net sectional area of first hydraulic cylinder (1) rod chamber (A1) and the ratio of first hydraulic cylinder (1) rodless cavity (A2), also equals the net sectional area of second hydraulic cylinder (2) rod chamber (B1) and the ratio of second hydraulic cylinder (2) rodless cavity (B2);
Described first control valve (9) and second control valve (8) be used for to be regulated flow makes two-position four way change valve (3) by the regular hour commutation, and this time is first hydraulic cylinder (1) rodless cavity (A2) maximum volume divided by the merchant of the flow value of the high-pressure thick water inlet (P3) that enters energy recycle device or second hydraulic cylinder (2) rodless cavity (B2) the maximum volume merchant divided by the flow value of the high-pressure thick water inlet (P3) that enters energy recycle device;
The high pressure feedstock water pressure that described high pressure feedstock water outlet (P4) is located reaches the intake pressure of counter-infiltration membrane stack.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310167256.7A CN103230745B (en) | 2013-05-07 | 2013-05-07 | Differential pressure booster-type energy recovery device based on reverse osmosis system |
| PCT/CN2013/085362 WO2014180092A1 (en) | 2013-05-07 | 2013-10-17 | Pressure-difference boost-type energy recycling apparatus based on reverse osmosis system |
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| CN201310167256.7A CN103230745B (en) | 2013-05-07 | 2013-05-07 | Differential pressure booster-type energy recovery device based on reverse osmosis system |
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| CN103230745B CN103230745B (en) | 2014-10-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014180092A1 (en) * | 2013-05-07 | 2014-11-13 | 杭州（火炬）西斗门膜工业有限公司 | Pressure-difference boost-type energy recycling apparatus based on reverse osmosis system |
| CN104209008A (en) * | 2014-07-03 | 2014-12-17 | 国家海洋局天津海水淡化与综合利用研究所 | Reverse osmosis seawater desalination energy recovery apparatus performance test system and method thereof |
| CN104229939A (en) * | 2014-09-19 | 2014-12-24 | 北京工业大学 | Recovering device for liquid pressure energy based on piston type liquid switcher |
| CN104712510A (en) * | 2013-12-16 | 2015-06-17 | 北京长宇利华液压系统工程设计有限公司 | Energy recovery and pressurization method and device of hydraulic motor and hydraulic pump combination |
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| US6491813B2 (en) * | 2000-02-02 | 2002-12-10 | Schenker Italia S.R.L. | Equipment for desalination of water by reverse osmosis with energy recovery |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2014180092A1 (en) * | 2013-05-07 | 2014-11-13 | 杭州（火炬）西斗门膜工业有限公司 | Pressure-difference boost-type energy recycling apparatus based on reverse osmosis system |
| CN104712510A (en) * | 2013-12-16 | 2015-06-17 | 北京长宇利华液压系统工程设计有限公司 | Energy recovery and pressurization method and device of hydraulic motor and hydraulic pump combination |
| CN104209008A (en) * | 2014-07-03 | 2014-12-17 | 国家海洋局天津海水淡化与综合利用研究所 | Reverse osmosis seawater desalination energy recovery apparatus performance test system and method thereof |
| CN104209008B (en) * | 2014-07-03 | 2016-02-03 | 国家海洋局天津海水淡化与综合利用研究所 | A kind of reverse osmosis sea water desalting energy recovery device Performance Test System and method |
| CN104229939A (en) * | 2014-09-19 | 2014-12-24 | 北京工业大学 | Recovering device for liquid pressure energy based on piston type liquid switcher |
| CN104229939B (en) * | 2014-09-19 | 2015-10-28 | 北京工业大学 | A kind of fluid pressure energy retracting device based on piston type liquid switch |
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