A raw water concentrated water replacement system in dt membrane

Abstract

The invention discloses a raw water concentrated water replacement system in a DT membrane, which includes a raw water tank, a security filter, a surge tank, a double plunger pump, a reverse osmosis membrane and a concentrated water tank. The outlet of the regulator is connected to the inlet of the surge tank and the inlet of the pressurized side of the double plunger pump, the outlet of the pressurized side of the double plunger pump is connected to the inlet of the water inlet of the reverse osmosis membrane, and the outlet of the water inlet of the reverse osmosis membrane is connected to the inlet of the driving side of the double plunger pump , the outlet on the driving side of the double-piston pump is connected to the concentrated water tank, the outlet of the surge tank is connected to the inlet on the pressurized side of the double-piston pump, and the outlet on the driving side of the double-piston pump is connected to the inlet on the pressurized side of the double-piston pump. Through the interaction between the double plunger pump and the bladder type surge tank, the normal working process and the working process of replacing the concentrated water in the reverse osmosis membrane are switched to achieve continuous water production; replacing the concentrated water in the reverse osmosis membrane with raw water can greatly reduce the system power. consumption; replacing the concentrated water in the reverse osmosis membrane with raw water can reduce the concentration of salt and pollutants in the reverse osmosis membrane and prolong the service life of the reverse osmosis membrane.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a raw water concentrated water replacement system in a DT membrane. Background technique [0002] At present, in the field of sewage treatment, especially in the treatment of garbage permeate, a circulating pump is usually used to boost the high-pressure concentrated water of the DT reverse osmosis membrane and then merge with the high-pressure raw water to enter the water inlet of the DT. The water flow rate of the DT membrane can be increased to increase the flushing force and reduce the degree of fouling of the DT membrane. [0003] In the prior art, the water that needs to be treated in the raw water tank enters the high-pressure pump after passing through the security filter. It becomes produced water and enters the produced water tank. The concentrated high-pressure concentrated water is divided into two paths. One path is decompressed by the regulating valve and enters the...

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the concentrated water in the membrane cannot be replaced with raw water during the operation of the DT in the above-mentioned prior art, and to provide a raw water concentrated water replacement system in the DT membrane, which replaces the high pressure by using a double plunger pump The pump and circulation pump, together with the bladder type surge tank, solve the above problems

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