CN102030428A

CN102030428A - Automatic-adjusting reverse osmosis produced water conductivity system

Info

Publication number: CN102030428A
Application number: CN200910154010XA
Authority: CN
Inventors: 韩琳
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-30
Filing date: 2009-09-30
Publication date: 2011-04-27

Abstract

An automatic-adjusting reverse osmosis produced water conductivity system includes a pretreatment device, an assistant dosing device, a safety filter, a high-pressure pump, a reverse osmosis device, a conductivity (C1) meter and a PLC controller. The system detects conductivity of the reverse osmosis produced water through the conductivity (C1) meter on a reverse osmosis produced water pipe, and feeds back the conductivity to the PLC controller, the PLC controller compares the field reverse osmosis produced water conductivity with the reverse osmosis produced water conductivity set on request, if the reverse osmosis produced water conductivity cannot meet requirement, the PLC controller transmits instructions to the assistant dosing device to adjust dosage of the assistant, so that the reverse osmosis produced water conductivity can meet a required set value. This is because the assistant is used and mixed with a reverse osmosis water inflow to change performance of an inflow of a reverse osmosis system, improve contact condition of the inflow of the reverse osmosis system and a reverse osmosis film surface and activate a retention layer of the reverse osmosis film surface, thereby reducing ion concentration of the inflow retention layer on the reverse osmosis film surface, so that the ion in the inflow of the reverse osmosis system transmits through the reverse osmosis film with pressure, and content of ions entering a reverse osmosis produced water side is reduced, thereby causing reduction of the produced water conductivity of the reverse osmosis system. Simultaneously, change of dosage of the assistant influences the content of ions on the retention layer of the reverse osmosis film surface, thereby influencing the produced water conductivity of the reverse osmosis system.

Description

The reverse osmosis produced water conductivity of a kind of automatic adjusting system

Technical field

The present invention relates to a kind ofly can regulate reverse osmosis produced water conductivity system automatically.

Background technology

It is comparatively general at present to use reverse osmosis system to make pure water, characteristics such as water quality treatment wide ranges, effluent quality are good, environmental protection that it has.But reverse osmosis system produces the variation of water conductivity along with water inlet specific conductivity etc., changes with corresponding, sometimes even can not meet the requirements of the requirement of product water water quality to its specific conductivity, the reverse osmosis produced water conductivity phenomenon that exceeds standard occurs.

Summary of the invention

The technical problem that quasi-solution of the present invention is determined is: reverse osmosis system produces water conductivity as required, when the feed water by reverse osmosis specific conductivity changes, can automatically adjust, and produces the requirement of water water quality to its specific conductivity to reach reverse osmosis system.

Embodiment of the present invention are: pretreatment unit, security personnel's filter, high-pressure pump, reverse osmosis unit, CI (specific conductivity) instrument are linked in sequence with pipeline, and the signal that they are relevant concentrates on the PLC controller, with each signal sets value on the PLC controller relatively after, automatically adjust the product water conductivity of control reverse osmosis system.

The invention has the beneficial effects as follows: as required reverse osmosis system produces water conductivity, and when reverse osmosis system water inlet conductivity variations, system's auxiliary agent dosage that can automatically adjust, the product water conductivity that guarantees reverse osmosis system satisfy and produce the requirement of water water quality to it.This is because the adding of auxiliary agent, it is with after feed water by reverse osmosis mixes, changed the performance of reverse osmosis system water inlet, improved the contact condition of reverse osmosis system water inlet, activated the retention layer of reverse osmosis face, thereby reduced the ionic concn of the enterprising hydropexis layer of reverse osmosis face with the reverse osmosis face, and then make ion in the reverse osmosis system water inlet, see through reverse osmosis membrane with pressure water, the ion content that enters the reverse osmosis produced water side reduces, and causes reverse osmosis system to produce the reduction of water conductivity.Simultaneously, the variation of auxiliary agent dosage will influence reverse osmosis face retention layer ion content, produce water conductivity thereby influence reverse osmosis system.

Description of drawings

Accompanying drawing is an overall structure synoptic diagram of the present invention.

Embodiment

The invention will be further described below in conjunction with accompanying drawing.

As accompanying drawing; After former water (1) enters pretreatment unit (2) processing, after process auxiliary agent throwing device (10) adds auxiliary agent, enter security personnel's filter (3), after filtering by security personnel's filters (3) again, enter high-pressure pump (4), after high-pressure pump (4) pressurization, deliver to reverse osmosis unit (5), after reverse osmosis unit (5) was handled, the pure water of output became outer for pure water (6) after CI (specific conductivity) instrument (7) detection is qualified; Concentrated water discharge after reverse osmosis unit (5) is handled is to dense pond (8).Wherein the control signal in the reverse osmosis system concentrates on the PLC controller (9), by the signal of PLC controller (9) by collecting, produce the water conductivity set(ting)value relatively with the reverse osmosis system that requires, the automatically adjust auxiliary agent dosage of auxiliary agent throwing device (10) makes reverse osmosis system produce water conductivity and satisfies and produce the water requirements in water quality.

Be the concrete performance of the present invention below.

Annotate: require reverse osmosis system to produce water conductivity≤10 μ s/cm.

As seen from the above table, under feed water by reverse osmosis specific conductivity 372 μ s/cm conditions, its reverse osmosis produced water conductivity is 9.3 μ s/cm, reached the product water conductivity (≤10 μ s/cm) of system requirements, but increase under the 432 μ s/cm conditions in the feed water by reverse osmosis specific conductivity, its reverse osmosis produced water conductivity is 10.6 μ s/cm, can not reach the product water conductivity (≤10 μ s/cm) of system requirements, at this moment reverse osmosis system of the present invention is by CI (specific conductivity) instrument on the reverse osmosis produced waterpipe, detect reverse osmosis produced water conductivity, it is fed back on the PLC controller, by the PLC controller it is compared with the reverse osmosis produced water conductivity that requires≤10 μ s/cm, illustrate that specific conductivity is higher, at this moment its instruction auxiliary agent throwing device, strengthening the auxiliary agent dosage, is that 9.5 μ s/cm have reached requirement (specific conductivity≤10 μ s/cm) until reverse osmosis produced water conductivity.

By above example explanation, reverse osmosis system of the present invention, when factors such as reverse osmosis system water inlet specific conductivity changed, it can automatically adjust by the auxiliary agent dosage to the auxiliary agent throwing device, makes reverse osmosis system produce water conductivity and reaches requirement.

Claims

1. automatically regulate reverse osmosis produced water conductivity system for one kind, it is characterized in that it is made up of pretreatment unit (2), auxiliary agent throwing device (10), security personnel's filter (3), high-pressure pump (4), reverse osmosis unit (5), CI (specific conductivity) instrument (7), PLC controller (9) and corresponding connection fittings.

2. the auxiliary agent throwing device (10) of the reverse osmosis produced water conductivity of automatic adjusting according to claim 1 system is characterized in that auxiliary agent that it adds is by a kind of chemical reagent or number of chemical reagent is composite to form.

3. the reverse osmosis unit (5) of the reverse osmosis produced water conductivity of automatic adjusting according to claim 1 system is characterized in that it is first-stage reverse osmosis device or multistage reverse osmosis unit.

4. the pretreatment unit (2) of the reverse osmosis produced water conductivity of automatic adjusting according to claim 1 system is characterized in that it is strainer, softening agent, micro-strainer, ultra-fine filter or their combination.