CN201347372Y - Water PH adjustable reverse osmosis device - Google Patents

Abstract

A PH-adjustable reverse osmosis device for produced water. In the reverse osmosis device composed of a scale inhibitor dosing device, a security filter, a high-pressure pump and a reverse osmosis device, a set of PH adjustment devices is arranged especially on the water inlet pipe of the security filter. , used to adjust the pH of reverse osmosis feed water, and then achieve the purpose of adjusting the pH of reverse osmosis product water. Practice has proved that the utility model can make the conductivity of the produced water reach the required value on the basis of meeting the PH requirement of the reverse osmosis produced water.

Description

Water PH adjustable reverse osmosis device

technical field

The utility model relates to a reverse osmosis membrane pure water device.

Background technique

At present, it is more common to use reverse osmosis membrane devices to produce pure water. It has the characteristics of wide range of water quality, good effluent quality, and environmental protection. However, when the pH of the reverse osmosis product water cannot meet the requirements, the currently used method is to directly add acid or alkali to the reverse osmosis product water to achieve the required pH of the product water; but directly add acid or alkali to the reverse osmosis product water Adding alkali will increase the conductivity of the reverse osmosis product water, making the quality of the reverse osmosis product water worse, and the pH of the reverse osmosis product water will meet the requirements, while the conductivity of the reverse osmosis product water will exceed the standard.

Contents of the invention

The technical problem to be solved by the utility model is to adjust the pH of the reverse osmosis produced water, and at the same time make the reverse osmosis produced water conductivity index meet the requirement under the premise that the pH of the reverse osmosis produced water meets the requirements.

The technical solution of the utility model is: in the reverse osmosis device composed of the antiscalant dosing device, security filter, high-pressure pump and reverse osmosis device connected in sequence by pipelines, a set of pH The adjusting device is used to adjust the pH of the reverse osmosis water.

The beneficial effect of the utility model is that since the PH adjustment is carried out in the feed water of the reverse osmosis device, and the reverse osmosis membrane in the reverse osmosis device can intercept most of the ions in the feed water, it has little influence on the conductivity of the reverse osmosis produced water . Therefore, the pH of the reverse osmosis feed water is adjusted, which causes the pH of the reverse osmosis product water to change. Under the premise that the pH of the reverse osmosis product water meets the requirements, the conductivity of the reverse osmosis product water also meets the requirements.

Description of drawings

Accompanying drawing is the utility model overall structure schematic diagram.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in the accompanying drawing; the pretreated water (1) obtained from the pretreatment system is used as raw water, passes through the pipeline (2), and after the scale inhibitor is added to the scale inhibitor dosing device (11), it enters the security filter (3), and then Enter the high-pressure pump (4) from the security filter (3), after being pressurized by the high-pressure pump (4), it is sent to the reverse osmosis device (6) through the pump outlet pipe (5), and after being treated by the reverse osmosis device (6), The pure water of output becomes external supply pure water (8) through pipeline (7), and the concentrated water after the treatment is discharged into concentrated water pool (10) through discharge pipe (9); 3) On the water inlet pipeline (2), a set of pH adjusting device (12) is provided for adjusting the pH of the reverse osmosis feed water, and then achieve the purpose of adjusting the pH of the reverse osmosis produced water.

The following is the specific implementation of the utility model and the common reverse osmosis device.

Embodiment one:

For a given source of raw water, it is required that the water produced by the reverse osmosis device has a pH ≥ 6.5 and a conductivity ≤ 10 μs/cm.

It can be seen from the above table that under the same raw water conditions, when the reverse osmosis device of the present invention reaches the required pH of the produced water, the conductivity of the produced water decreases and the water quality improves. Reduce the influence of gas dissolved in raw water on the conductivity of reverse osmosis product water, which makes the PH and conductivity of reverse osmosis product water meet the requirements at the same time; The conductivity of the product water has risen to 12.3μs/cm, which cannot meet the required conductivity of the reverse osmosis product water.

Embodiment two:

For a given source of raw water, it is required that the water produced by the reverse osmosis device has a pH ≤ 5.5 and a conductivity ≤ 10 μs/cm.

It can be seen from the above table that under the same raw water conditions, when the reverse osmosis device of the present invention reaches the required pH of the produced water, the conductivity of the produced water increases and the water quality decreases, but the required conductivity of the reverse osmosis produced water can still be achieved; When the type reverse osmosis device reaches the required pH of the product water, the conductivity of the product water rises greatly, reaching 10.1μs/cm, which cannot meet the required conductivity of the product water of reverse osmosis.

Through the above examples, the utility model can make the reverse osmosis produced water meet the required pH and conductivity indexes of the produced water at the same time.

Claims (2)

1. A reverse osmosis device with adjustable pH of produced water, comprising a scale inhibitor dosing device (11), a security filter (3), a high-pressure pump (4) and a reverse osmosis device (6), characterized in that the security filter ( 3) On the water inlet pipe (2), a set of pH adjusting device (12) is arranged. 2. The reverse osmosis device according to claim 1, characterized in that it is a one-stage reverse osmosis device or a multi-stage reverse osmosis device.

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