CN201347371Y

CN201347371Y - Reverse osmosis equipment with high desalinization ratio

Info

Publication number: CN201347371Y
Application number: CNU200820165774XU
Authority: CN
Inventors: 韩琳
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-16
Filing date: 2008-10-16
Publication date: 2009-11-18
Anticipated expiration: 2018-10-16

Abstract

The utility model discloses reverse osmosis equipment with high desalinization ratio. A set of alkali adding device is arranged in the reverse osmosis equipment consisting of a scale inhibitor adding device, a safety filter, a high pressure pump and a reverse osmosis unit, particularly on the front water intake pipe of the safety filter, to enable the carbon dioxide gas dissolved in the water can react with the added alkali liquid to be converted to bicarbonate ions so as to be intercepted by a reverse osmosis membrane. In this way, influence to the quality of the water produced by the reverse osmosis equipment from the carbon dioxide gas dissolved in the water can be effectively reduced. Practices show that the reverse osmosis equipment can remarkably reduce the conductivity of the water produced by the reverse osmosis equipment, thereby improving the desalinization ratio of the reverse osmosis equipment.

Description

High desalination rate reverse osmosis unit

Technical field

The utility model relates to a kind of reverse osmosis membrane legal system pure water device.

Background technology

It is comparatively general at present to use reverse osmosis membrane apparatus to make pure water, characteristics such as water quality treatment wide ranges, effluent quality are good, environmental protection that it has.But because in the reverse osmosis unit former water to be processed, it generally contains a certain amount of carbon dioxide, and reverse osmosis membrane can only be held back impurity such as ion in the water into, colloid, and can not hold back gas soluble in water, make to be dissolved in carbon dioxide in the former water, see through reverse osmosis membrane, the product water side that enters reverse osmosis unit with permeate water, influence reverse osmosis unit and produce water water quality, cause the reverse osmosis unit ratio of desalinization to descend.

Past is owing to be subjected to the restriction (general scale-inhibiting properties such as bright lattice Leah index are 0.5) of Scale inhibitors scale-inhibiting properties, for preventing the hardness ions in former water, influent side in reverse osmosis unit, the fouling owing to concentrate, often need in the reverse osmosis unit water inlet, to add acid, with the bright lattice Leah index of reduction water inlet, thereby reach the bright lattice Leah of the dense water index (hardness ions fouling performance index) that reduces reverse osmosis unit, make it in Scale inhibitors scale-inhibiting properties scope; In former water, add acid, make the bicarbonate ion in the former water be converted into carbon dioxide, increased the carbon dioxide content in the former water, make it see through reverse osmosis membrane, influence reverse osmosis unit and produce water water quality.But existing significantly raising (scale-inhibiting properties such as bright lattice Leah index are increased to 2.5 from 0.5) along with the Scale inhibitors scale-inhibiting properties makes to add alkali like this in the reverse osmosis unit water inlet, becomes possibility and make the dense water side of reverse osmosis unit that fouling still not take place.

Summary of the invention

The purpose of this utility model is to provide a kind of reverse osmosis unit of high desalination rate, and carbon dioxide content is to the influence of reverse osmosis unit ratio of desalinization in intaking with the solution reverse osmosis unit.

Technical solution of the present utility model is: in the reverse osmosis unit that the Scale inhibitors throwing device that is linked in sequence with pipeline, security personnel's filter, high-pressure pump, counter-osmosis device are formed, at the reverse osmosis unit influent side one cover adder-subtractor is set especially, is used for adding alkali lye in the counter-osmosis device water inlet.

The beneficial effects of the utility model are, owing to added alkali lye in the counter-osmosis device water inlet, make itself and carbon dioxide soluble in water produce reaction, the generation bicarbonate ion, thus held back by reverse osmosis membrane; Owing to reduced the carbon dioxide gas body burden in the counter-osmosis device water inlet, its carbon dioxide content that sees through reverse osmosis membrane is reduced, so just reach and improve reverse osmosis unit product water water quality, the ratio of desalinization of reverse osmosis unit is improved.

Description of drawings

Accompanying drawing is the utility model overall structure synoptic diagram.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

As accompanying drawing; The pretreated water (1) that obtains from pretreatment system is as former water, by pipeline (2), after Scale inhibitors throwing device (11) adds Scale inhibitors, enter security personnel's filter (3), enter high-pressure pump (4) by security personnel's filters (3) again, after high-pressure pump (4) pressurization, deliver to counter-osmosis device (6) by pump discharge pipe (5), after counter-osmosis device (6) was handled, the pure water of output became outer for pure water (8) by pipeline (7), and the dense water after the processing is disposed to dense pond (10) by delivery pipe (9); And in the utility model, a cover adder-subtractor (12) is set on the suction culvert (2) of security personnel's filters (3) especially; The carbon dioxide that is used for intaking makes the transition and is bicarbonate ion, it is held back by reverse osmosis membrane, so just reduce carbon dioxide to the influence that reverse osmosis unit produces water conductivity, improved reverse osmosis unit and produced water water quality, promptly improved the ratio of desalinization of reverse osmosis unit.

Be the utility model and common reverse osmosis unit production performance comparison sheet below.

As seen from the above table, under identical former water condition, the utility model reverse osmosis unit has obviously reduced reverse osmosis produced electrical conductivity of water, compares with the coventional type reverse osmosis unit, and device ratio of desalinization absolute value improves 0.5%, has significantly improved reverse osmosis unit and has produced water water quality.

Claims

1, a kind of high desalination rate reverse osmosis unit comprises Scale inhibitors throwing device (11), security personnel filter (3), high-pressure pump (4) and counter-osmosis device (6), it is characterized in that on security personnel's filter (3) water inlet pipes (2), is provided with a cover adder-subtractor (12).

2, reverse osmosis unit according to claim 1 is characterized in that it is first-stage reverse osmosis device or multistage reverse osmosis unit.