CN2461915Y

CN2461915Y - Reverse osmosis unit with piston type energy recoverer

Info

Publication number: CN2461915Y
Application number: CN00266242U
Authority: CN
Inventors: 刘博渊
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-29
Filing date: 2000-12-29
Publication date: 2001-11-28
Anticipated expiration: 2010-12-29

Abstract

The utility model relates to a reverse osmosis device with a piston type energy recovering device, which belongs to a device using the selective permeation capability of a reverse osmosis membrane for water quality treatment, particularly a reverse osmosis device suitable for sea water desalination, brackish water and pure water preparation. The utility model comprises a raw water tank, a pressurizing pump and a reverse osmosis element. The main structure is that the concentrated water outlet of the reverse osmosis element is connected with a piston type energy recovering device. The piston type energy recovering device is composed of a reverser, an I-number and a II-type piston cylinders, an I-number and a II-number plunger pumps, and a pipeline with a one-way valve which are orderly connected. The position change of a reversing valve is used for crosswise supplying liquid and recovering energy, and thus, the purposes of reducing the supplied flow quantity of the pressurizing pump and saving the energy are obtained.

Description

The reverse osmosis unit of band piston type energy withdrawer

The utility model relates to a kind of reverse osmosis unit with the piston type energy withdrawer, belongs to the device that the selective permeation ability of utilizing reverse osmosis membrane is carried out water conditioning, especially is applicable to the reverse osmosis unit of sea water desaltination, brackish water desalination, pure water preparation.

The reverse osmosis unit of known sea water desaltination, brackish water desalination and pure water preparation often adopts reverse osmosis membrane assembly, with the influent quality is that seawater is an example, because the difference of reverse osmosis membrane assembly, the membrane element product water rate of recovery with tubular fibre is about 30%, and the rolled film component products water rate of recovery is about 20%.The energy 70%-80% that force (forcing) pump consumed that seawater is pressed into reverse-osmosis membrane element has been discharged with dense water, has wasted big energy.

The purpose of this utility model is to overcome above-mentioned prior art problems and provide a kind of and improve energy-saving effect, be applicable to that large, medium and small type device extensively is suitable for the reverse osmosis unit of practical band piston type energy withdrawer.

The purpose of this utility model reaches by following technical proposal.

The utility model includes former water tank, the force (forcing) pump that joins with former water tank, through pipeline with in the reverse-osmosis membrane element with two export and imports of permeable membrane is arranged, reverse-osmosis membrane element through its outlet with had the pipeline that when start regulate the pressure and the flow valve of flow effect and be connected with the import of piston type energy withdrawer, described piston type energy withdrawer is by the reversing valve with two imports and two outlets, the I piston cylinder and I ram pump and II piston cylinder and the II ram pump that connect respectively successively through pipeline by the export and import of reversing valve, the pipeline that is connected with former water tank by the import of I ram pump with check valve, the pipeline with check valve (37) that is connected with pipeline (38) by the import of II ram pump and exported by outlet of I ram pump and II ram pump and to be connected the pipeline (36) with check valve with pipeline (3) and to form, the I piston cylinder is connected with the II piston cylinder through interface.Pipeline (13) is connected with the pipeline with variable valve (11), and the outlet of reversing valve is connected with water shoot.

From the effusive pressure fluid of reverse-osmosis membrane element (dense water), advance reversing valve through flow valve, enter the I piston cylinder again, the piston that promotes wherein moves to left, and through interface direction of flow II piston cylinder, promotes its piston and moves to right, and fluid exports into the draining discharging through reversing valve.The piston of I piston pump moves to left and drives the I ram pump and move to left, wherein fluid extrudes through its outlet, and the pipeline by having check valve and the pipeline between force (forcing) pump and the reverse-osmosis membrane element converge and enter reverse-osmosis membrane element, after the reversing valve transposition, fluid enters the II piston cylinder through reversing valve, promote the II ram pump, so make and promote I number and II ram pump from the pressure fluid of reverse-osmosis membrane element and intersect and supply with fluid, reclaimed with the effusive pressure fluid of reverse-osmosis membrane element, the ram pump that made it energy drives reaches significantly reducing and then purpose of energy saving for flow of force (forcing) pump.

The utility model compared with prior art has following advantage: the 70%-80% that accounts for its inlet flow rate from the fluid of reverse-osmosis membrane element outlet, adopted the piston type energy withdrawer just to reclaim this portion of energy, thereby make capacity usage ratio bring up to 60%-80%, and no matter be small-sized or large-scale reverse osmosis unit, this transverter is all applicable, practicality is not difficult during enforcement yet.

The explanation of accompanying drawing drawing:

Fig. 1 is a structural representation of the present utility model.

Following the utility model will describe in detail embodiment (in conjunction with the accompanying drawings).

The force (forcing) pump 2 that the utility model shown in Figure 1 includes former water tank 1, join with former water tank 1, through pipeline 3 with in the reverse-osmosis membrane element 6 with outlet (7 and 9) and import 4 of permeable membrane 5 is arranged, the outlet of reverse-osmosis membrane element 6 is connected to product water pipe 8, and reverse-osmosis membrane element 6 is connected with the import 15 of piston type energy withdrawer 14 with the pipeline 13 with flow valve 12 through its outlet 9.

Piston type energy withdrawer 14 is by the reversing valve 18 with import (15 and 19) and outlet (20 and 17), the I piston cylinder 23 and I ram pump 26 and II piston cylinder 24 and the II ram pump 27 that are connected respectively successively through pipeline (22 and 21) by the outlet 20 of reversing valve 18 and import 19, the pipeline with check valve 32 38 that is connected with former water tank 1 by 26 imports 25 of I ram pump, the pipeline with check valve 35 37 that is connected with pipeline 38 by 27 imports 31 of II ram pump and form with II ram pump 27 outlets 30 the pipelines 36 that are connected with pipeline 3 with check valve (33 and 34) by 26 outlets 29 of I ram pump.I piston cylinder 23 is connected with II piston cylinder 24 through interface 25, and pipeline 13 is connected with the pipeline 11 with variable valve 10, and the outlet 17 of reversing valve 14 is connected with water shoot 16.

Use when implementing, the water quality of former water tank 1 is that seawater, brackish water or pure water preparation are example, and force (forcing) pump 2 enters reverse-osmosis membrane element 4 after seawater is pressurizeed, and moisture content is held back by permeable membrane 2, the water that sees through is collected through water producing pipe, and trap water is the dense water higher than influent concentration.Behind outlet 9 effusive pressure fluids (dense water) the process flow valve 12 of reverse-osmosis membrane element 4, advance reversing valve 14 from the import 15 of reversing valve 14, and from its outlet 20 go out reversing valve 14 after, advance I piston cylinder 23, promoting wherein, piston is moved to the left, thereby make the left side of direction of flow II piston cylinder 24 inner carriers in piston left side, promote the II piston and move right the discharge of the fluid in the II piston cylinder 24 right chambeies, fluid is discharged the back and is advanced reversing valve 14 and become the draining discharging from its outlet 17 from the import 19 of reversing valve 14.The piston of I piston cylinder 23 moves to the left and has driven I ram pump 26, force I ram pump 26 to moving to left, liquid in the I ram pump 26 is extruded from its outlet 29, fluid passes its check valve that exports 29 left sides 33, extruding fluids by pipeline 36 to pipeline 3 and force (forcing) pump 2 converges the back and enters ro components 6 from reverse-osmosis membrane element 6 imports 4.After reversing valve 14 transpositions, fluid from reverse-osmosis membrane element 6 outlets 9 advances from reversing valve 14 imports 15, go out from its import (the commutation back is outlet at this moment), and enter II piston cylinder 24, promote II ram pump 27 extruder pressure fluids, so make from the pressure fluid of reverse-osmosis membrane element 6 and promote I number and II ram pump (26 and 27) intersects for fluid, recovery is from reverse-osmosis membrane element 6 outlets 9 effusive pressure fluids, made it energy drives ram pump (26 and 27), reaching force (forcing) pump is to significantly reduce and purpose of energy saving for flow.

Claims

1, a kind of reverse osmosis unit with the piston type energy withdrawer, include former water tank [1], the force (forcing) pump [2] that joins with former water tank [1], through pipeline [3] with in the reverse-osmosis membrane element [6] with outlet [7 and 9] and import [4] of permeable membrane [5] is arranged, the outlet [7] of reverse-osmosis membrane element [6] is connected to product water pipe [8], it is characterized in that reverse-osmosis membrane element [6] is connected with the import [15] of piston type energy withdrawer [14] with the pipeline with flow valve [12] [13] through its outlet [9], described piston type energy withdrawer [14] is by the reversing valve [18] with import [15 and 19] and outlet [20 and 17], the I piston cylinder [23] and I ram pump [26] and II piston cylinder [24] and the II ram pump [27] that are connected respectively successively through pipeline [22 and 21] by the outlet [20] of reversing valve [18] and import [19], the pipeline with check valve [32] [38] that is connected with former water tank [1] by I ram pump [26] import [25], by II ram pump [27] import [31] be connected with pipeline [38] have check valve [35] pipeline [37] and export the pipeline [36] that [30] be connected with pipeline [3] by I ram pump [26] outlet [29] and II ram pump [27] and form with check valve [33 and 34], I piston cylinder [23] is connected with II piston cylinder [24] through interface [25], pipeline [13] is connected with the pipeline with variable valve [10] [11], and the outlet [17] of reversing valve [14] is connected with water shoot [16].