CN103230745B - 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 PDF

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Publication number
CN103230745B
CN103230745B CN201310167256.7A CN201310167256A CN103230745B CN 103230745 B CN103230745 B CN 103230745B CN 201310167256 A CN201310167256 A CN 201310167256A CN 103230745 B CN103230745 B CN 103230745B
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pressure
hydraulic cylinder
energy recycle
water
outlet
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CN201310167256.7A
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Chinese (zh)
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CN103230745A (en
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张希建
张建中
余涛
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杭州(火炬)西斗门膜工业有限公司
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Priority to CN201310167256.7A priority Critical patent/CN103230745B/en
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Priority claimed from PCT/CN2013/085362 external-priority patent/WO2014180092A1/en
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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

A kind of differential pressure pressurization formula energy recycle device based on counter-infiltration system

Technical field

The present invention relates to the energy recycle device in fluid system.

Background technology

Have a great development for the research of fluid pressure energy comprehensive utilization technique and equipment both at home and abroad, developed numerous multi-form devices.Some devices wherein have become industrialization commodity, are applied on corresponding industrial circle, and have obtained good economic benefit, and this saves the energy, reduces costs and be very helpful for enterprise.

Pressure fluid total energy approach equipment is mainly divided into two large classes:

One class is that high-low pressure fluid carrys out transferring energy by impeller and main shaft, the intermediate link of transmitting using mechanical energy as fluid pressure energy.Typical device comprises reversion pump type (Francis Pump), Pei Erdun turbine (Pelton Whee1) and hydraulic turbine (Turbo Charger).Although this type of energy recycle device technology comparative maturity, but due to the deficiency in principle, after must first pressure energy being converted into mechanical energy, be converted into again pressure energy, in conversion process, inevitably there is energy loss, the space of therefore further raising the efficiency on existing basis is very limited, and its energy recovery efficiency is in 30 ~ 70% left and right.

Early 1990s, the fluid pressure energy recovery technology that another kind of efficiency is higher---function (pressure) interchanger develops rapidly, the structure of function (pressure) interchanger is very simple, high-pressure fluid is low-pressure fluid pressurization by the transfer function of piston (comprising taking high and low pressure mixing fluid column as piston), if ignore the factors such as the 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%, applied in numerous process industrials field in recent years.According to structure difference, pressure exchanger can be divided into again valve current allocating type function (pressure) interchanger 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 Calder company of Switzerland; The typical representative of typical dish oil-allocation type function (pressure) interchanger has the rotational pressure interchanger (Pressure Exchanger) of ERI company of the U.S..

Conventional desalination process, is divided into two tunnels through the qualified seawater of pretreatment, and a route high-pressure pump 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, after converging with last road high pressure sea water, enter reverse osmosis membrane assembly.And high-pressure booster manufacturing cost approaches with high-pressure pump, especially small flow high pressure booster pump price is very expensive.

Summary of the invention

Technical problem to be solved by this invention is to provide 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 is the intake pressure to counter-infiltration system by the boost in pressure of low pressure raw water directly, realizes stable pressure energy and exchanges and reduce equipment investment and lectotype selection difficulty.For this reason, the present invention is by the following technical solutions:

It comprises: two-position four way change valve, the first hydraulic cylinder, the second hydraulic cylinder, the first hydraulic cylinder has piston and the piston rod of the first hydraulic cylinder, and the second hydraulic cylinder has piston and the piston rod of the second hydraulic cylinder, described differential pressure pressurization formula energy recycle device also has the first flow check valve that outlet is connected with the first hydraulic cylinder rod chamber and import is connected with the import of low pressure raw material mouth, the second flow check valve that outlet is connected with the second hydraulic cylinder rod chamber and import is connected with the import of low pressure raw material mouth, the 3rd flow check valve that import is connected with the first hydraulic cylinder rod chamber and outlet is connected with high pressure feedstock water outlet, the 4th flow check valve that import is connected with the second hydraulic cylinder rod chamber and outlet is connected with high pressure feedstock water outlet, the first port of two-position four way change valve communicates with the first hydraulic cylinder rodless cavity, the second port communicates with the second hydraulic cylinder rodless cavity, the 3rd port communicates with high-pressure thick water inlet, the 4th port communicates with low-press thick water outlet, and described differential pressure pressurization formula energy recycle device also has the first control valve of being located on high-pressure thick water pipe, is located at the second control valve on low pressure raw water pipeline,

The high-pressure thick discharge that enters energy recycle device high-pressure thick water inlet is 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 entering 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 equal the net sectional area of the second hydraulic cylinder rod chamber and the ratio of the second hydraulic cylinder rodless cavity;

Described the first control valve and the second control valve make two-position four way change valve commutate by the regular hour for adjust flux, and this time is the first hydraulic cylinder rodless cavity maximum volume divided by entering the business of flow value of high-pressure thick water inlet of energy recycle device or the second hydraulic cylinder rodless cavity maximum volume divided by the business of flow value of high-pressure thick water inlet who 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.

Owing to adopting 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 reversion pump type (Francis Pump), Pei Erdun turbine (Pelton Whee1) with hydraulic turbine (Turbo Charger) and so on.

Use the counter-infiltration system of counter-infiltration system of the present invention compared with isobaric pressure-exchange recuperator, do not need to carry out the further supercharging of high pressure feedstock water for obtaining energy with high-pressure booster, utilize the energy that reclaims directly by the boost in pressure of low pressure raw water to the intake pressure of counter-infiltration system, realize stable pressure energy and exchange and reduce equipment investment and lectotype selection difficulty.

And, use the producing water ratio of counter-infiltration system of the present invention to change by adjusting 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, unadjustable in running.In the present invention, the first control valve is septum valve: be mainly used in controlling concentrated stream amount, namely the regulating system rate of recovery; The second control valve is low pressure modulating valve: be mainly used in regulating 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.

Brief description of the drawings

Fig. 1 is schematic diagram provided by the present invention, has shown principle of the present invention.

Detailed description of the invention

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, the first hydraulic cylinder 1, the second hydraulic cylinder 2, the first hydraulic cylinder 1 has the piston of the first hydraulic cylinder 1 and piston rod 11, the second hydraulic cylinders 2 and has piston and the piston rod 21 of the second hydraulic cylinder 2, described differential pressure pressurization formula energy recycle device also has the first flow check valve 4 that outlet is connected with the first hydraulic cylinder 1 rod chamber A1 and import is connected with low pressure raw material mouth import P1, the second flow check valve 6 that outlet is connected with the second hydraulic cylinder 2 rod chamber B1 and import is connected with low pressure raw material mouth import P1, import and the 3rd flow check valve 5 that the first hydraulic cylinder 1 rod chamber A1 is connected and outlet is connected with high pressure feedstock water outlet P4, the 4th flow check valve 7 that import is connected with the second hydraulic cylinder 2 rod chamber B1 and outlet is connected with high pressure feedstock water outlet P4, the first port 33 of two-position four way change valve 3 communicates with the first hydraulic cylinder 1 rodless cavity A2, the second port 34 communicates with the 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 the first control valve 9 of being located on high-pressure thick water pipe, is located at the second control valve 8 on low pressure raw water pipeline,

The high-pressure thick discharge that enters energy recycle device high-pressure thick water inlet P3 is 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 entering and the high pressure feedstock discharge of discharge equals the net sectional area of the first hydraulic cylinder 1 rod chamber A1 and the ratio of the first hydraulic cylinder 1 rodless cavity A2, the ratio of the net sectional area of the second hydraulic cylinder 2 rod chamber B1 and the second hydraulic cylinder 2 rodless cavity B2 equals the sectional area of the first hydraulic cylinder 1 rod chamber A1 and the ratio of the first hydraulic cylinder 1 rodless cavity A2; Described rod chamber net sectional area refers to: rodless cavity sectional area deducts the area of the piston rod sectional area in rod chamber.

Described the first control valve 9 and the second control valve 8 make two-position four way change valve 3 by regular hour commutation for adjust flux, and this time is the first hydraulic cylinder 1 rodless cavity A2 maximum volume divided by entering the business of flow value of high-pressure thick water inlet P3 of energy recycle device or the second hydraulic cylinder 2 rodless cavity B2 maximum volumes divided by the business of flow value of high-pressure thick water inlet P3 who 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 the left position of two-position four-way valve 3 is when logical, high-pressure thick water is imported into the first hydraulic cylinder 1 rodless cavity A2 promotion piston and piston rod 11 is discharged the raw water of the first hydraulic cylinder 1 rod chamber A1 to enter counter-infiltration membrane stack 50 by high pressure feedstock water out P4 with the state of high pressure from the 3rd flow check valve 5, low pressure raw water enters the second hydraulic cylinder 2 rod chamber B1 from P1 mouth by the second flow check valve 6 and promotes piston and piston rod 21 state discharge with low pressure by the reverse osmosis concentrated water of the second hydraulic cylinder 2 rod chamber B1 simultaneously, another kind of state is that two-position four-way valve 3 commutates while leading to for right position, high-pressure thick water is imported into the second hydraulic cylinder 2 rodless cavity B2 promotion pistons and piston rod 21 is discharged the raw water of the second hydraulic cylinder 2 rod chamber B1 to enter counter-infiltration membrane stack 50 by high pressure feedstock water out P4 with the state of high pressure from the 4th flow check valve 7, and low pressure raw water enters the first hydraulic cylinder 1 rod chamber A1 from P1 mouth by the first flow check valve 4 and promotes piston and piston rod 11 state discharge with low pressure by the reverse osmosis concentrated water of the first hydraulic cylinder 1 rod chamber A1 simultaneously.

As shown in Figure 1, the seawater reverse osmosis system of having applied 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; Be two-way through filter 30 low pressure raw material moisture after treatment, one tunnel boosts to the nominal operation pressure of reverse osmosis membrane membrane stack 50 through high-pressure pump, another road connects the 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 collects the rear water inlet as reverse osmosis membrane membrane stack 50.

Its operating procedure is as follows: first start low-lift pump 20, it is exerted oneself as 100m 3/ h × 0.2MPa, after filtering, the filter 30 that the supercharging of raw water seawater is 20um through precision enters high-pressure pump 40 and differential pressure pressurization formula energy recycle device 60, then start high-pressure pump 40 and differential pressure pressurization formula energy recycle device 60(starts energy recycle device 60 and starts two-position four-way valve 3 simultaneously), high-pressure pump is exerted oneself as 48m 3/ h × 6.0MPa, differential pressure pressurization formula energy recycle device 60 is accepted 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, the energy recovery efficiency approximately 90% of the dense water of engineering application counter-infiltration system.

Its advantage is: the water turbine formula energy recycle device that specific efficiency is 35-70%, and efficiency is higher; There is the system of isobaric pressure-exchange formula energy recycle device to need compared with high-pressure booster with application, the two efficiency is suitable, but the counter-infiltration system of application achievement of the present invention integrates pressure-exchange and high pressure supercharging, without high-pressure booster, use conveniently, cost is lower.

Claims (1)

1. the producing water ratio control method of a counter-infiltration system, described counter-infiltration system comprises differential pressure pressurization formula energy recycle device, and described differential pressure pressurization formula energy recycle device comprises two-position four way change valve (3), the first hydraulic cylinder (1), the second hydraulic cylinder (2), the first hydraulic cylinder (1) has piston and the piston rod (11) of the first hydraulic cylinder (1), and the second hydraulic cylinder (2) has piston and the piston rod (21) of the second hydraulic cylinder (2), described differential pressure pressurization formula energy recycle device also has the first flow check valve (4) that outlet is connected with the first hydraulic cylinder (1) rod chamber (A1) and import is connected with low pressure raw material mouth import (P1), the second flow check valve (6) that outlet is connected with the second hydraulic cylinder (2) rod chamber and import is connected with low pressure raw material mouth import (P1), the 3rd flow check valve (5) that import is connected with the first hydraulic cylinder (1) rod chamber (A1) and outlet is connected with high pressure feedstock water outlet (P4), the 4th flow check valve (7) that import is connected with the second hydraulic cylinder (2) rod chamber and outlet is connected with high pressure feedstock water outlet (P4), first port (33) of two-position four way change valve (3) communicates with the first hydraulic cylinder (1) rodless cavity (A2), the second port (34) communicates with the 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), it is characterized in that:
Described differential pressure pressurization formula energy recycle device also has the first control valve (9) of being located on high-pressure thick water pipe, is located at the second control valve (8) on low pressure raw water pipeline;
The high-pressure thick discharge that enters energy recycle device high-pressure thick water inlet (P3) is 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 entering and the high pressure feedstock discharge of discharge equals the net sectional area of the first hydraulic cylinder (1) rod chamber (A1) and the ratio of the first hydraulic cylinder (1) rodless cavity (A2), also equal the net sectional area of the second hydraulic cylinder (2) rod chamber (B1) and the ratio of the second hydraulic cylinder (2) rodless cavity (B2);
Described the first control valve (9) and the second control valve (8) make two-position four way change valve (3) by regular hour commutation for adjust flux, and this time is the first hydraulic cylinder (1) rodless cavity (A2) maximum volume divided by entering the business of flow value of high-pressure thick water inlet (P3) of energy recycle device or the second hydraulic cylinder (2) rodless cavity (B2) maximum volume divided by the business of flow value of high-pressure thick water inlet (P3) who 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.
CN201310167256.7A 2013-05-07 2013-05-07 Differential pressure booster-type energy recovery device based on reverse osmosis system CN103230745B (en)

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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
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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Families Citing this family (4)

* Cited by examiner, † Cited by third party
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
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
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
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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CN100341609C (en) * 2005-06-17 2007-10-10 中国科学院广州能源研究所 Strong brine energy recovery device based on reverse osmosis desalination technology
CN101782095A (en) * 2010-03-12 2010-07-21 国家海洋局天津海水淡化与综合利用研究所 Differential energy recovery device and method for seawater desalination system
CN102040261B (en) * 2010-11-04 2012-10-31 杭州水处理技术研究开发中心有限公司 Water-pressure automatic transposition energy recovery device

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Publication number Priority date Publication date Assignee Title
US6491813B2 (en) * 2000-02-02 2002-12-10 Schenker Italia S.R.L. Equipment for desalination of water by reverse osmosis with energy recovery
CN100341609C (en) * 2005-06-17 2007-10-10 中国科学院广州能源研究所 Strong brine energy recovery device based on reverse osmosis desalination technology
CN101782095A (en) * 2010-03-12 2010-07-21 国家海洋局天津海水淡化与综合利用研究所 Differential energy recovery device and method for seawater desalination system
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