Reverse osmosis purification backwater device

Abstract

The invention relates to the technical field of papermaking wastewater treatment, and particularly discloses a reverse osmosis purification backwater device which comprises a first reverse osmosis section, a second reverse osmosis section, a concentrated water tank and a high-pressure pump, the first reverse osmosis section is connected with the second reverse osmosis section in series, the concentrated water tank is connected with the second reverse osmosis section through a pipeline, and a water return pipe is connected between the concentrated water tank and the first reverse osmosis section. The high-pressure pump is arranged on the water return pipe, a temperature controller is arranged on the water return pipe and comprises a heating rod and a temperature control box, an auxiliary heating piece is arranged in the temperature control box and comprises a rotating shaft, cooling fins are fixed to the rotating shaft, the heating rod is arranged in the rotating shaft, and a water inlet and a water outlet are formed in the two sides of the temperature control box respectively. The water inlet and the water outlet are arranged relative to the upper and lower sides of the rotating shaft. Part of concentrated water enters the discharge treatment water tank through the pipeline, and part of the concentrated water is pumped into the first reverse osmosis section again through the water return pipe under the action of the high-pressure pump and is treated again together with wastewater so that the amount of the produced concentrated water is reduced.

Description

technical field [0001] The invention relates to the technical field of papermaking wastewater treatment, in particular to a reverse osmosis purification backwater device. Background technique [0002] my country's paper industry wastewater discharge ranks first among all types of industrial emissions in my country, and the paper industry has the most serious pollution to the water environment. It is not only the primary issue of pollution prevention and control in my country's paper industry, but also the primary issue of national industrial wastewater treatment and water conservation. The problem, how to reduce the pollution of papermaking wastewater and make use of the precious resources in the waste liquid is a work of great social significance and economic value. [0003] Reverse osmosis, a membrane separation technology that uses pressure difference as the driving force to separate the solvent from the solution. When pure water and salt water are separated by an ideal s...

AI Technical Summary

Problems solved by technology

[0006] The invention provides a reverse osmosis purification and return water device to solve the problem in the prior art that the wastewater discharge index is limited and the wastewater volume of the papermaking industry is difficult to reduce

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