Reverse osmosis device and reverse osmosis treatment system for treating high-concentration sewage

Abstract

The invention relates to a reverse osmosis device and a reverse osmosis treatment system for treating high-concentration sewage. The reverse osmosis device comprises a housing and a connecting rod which is arranged at the center of the housing, wherein a connection flange and a tail end flange, which are connected to two ends of the housing in a sealing manner, are respectively provided with a sewage inlet, a permeate outlet and a concentrated liquid outlet, a plurality of layers of laminar flow discs and filter membrane assemblies are sleeved on the connecting rod, a permeate passage which is communicated to the permeate outlet is arranged between each laminar flow disc and the connecting rod, an inner opening of each filter membrane assembly is communicated to the permeate passage, a plurality of elongated distributing holes are uniformly distributed on each laminar flow disc and close to a central hole, and the surface of each laminar flow disc is provided with a plurality of spoke-shaped guide passages along the radiation direction of the elongated distributing holes. The reverse osmosis treatment system comprises a treatment device for evaporating the high-concentration sewage at a low temperature and the reverse osmosis device, wherein the treatment device comprises a sewage preheating assembly, an air preheating assembly, a low-temperature plate-type evaporation device and a recycling assembly. The reverse osmosis device has the advantages of high sewage treatment efficiency, high water yield, good water outlet effect, low energy consumption and the like and the service life of the membrane is long.

Description

technical field [0001] The invention belongs to the field of high-concentration sewage treatment, and in particular relates to a reverse osmosis device and a reverse osmosis treatment system for high-concentration sewage treatment developed by utilizing the principles of hydrodynamics and hydraulics. Background technique [0002] In recent years, many new technologies have achieved rapid development in the application of high-concentration sewage treatment, such as landfill leachate treatment. One of the current application trends is the application of membrane technology, including microfiltration membranes, ultrafiltration membranes, nanofiltration membranes and reverse osmosis membranes. The advantage of using membrane technology is that the effluent water quality is better and can meet higher discharge requirements. However, in the prior art disc-tube reverse osmosis (DTRO) membrane system, the surface of the diversion plate is provided with a bump-like structure as a d...

AI Technical Summary

Problems solved by technology

However, in the prior art disc-tube reverse osmosis (DTRO) membrane system, the surface of the diversion plate is provided with a bump-like structure as a diversion structure, such as Image 6 As shown, this structure is easy to cause explosive diffusion of hydraulic power, resulting in increased energy loss of the system; and the shape of the diaphragm is circular, such as Figure 7 As shown, it is easy to cause excessive local pressure to cause the diaphragm to be penetrated and damaged

[0003] In general, affected by different factors, the membrane treatment devices in the prior art have high energy consumption, low water production rate, unstable water discharge effect and short service life of the equipment during operation. Limited by these defects, Membrane treatment technology has certain bottlenecks when it is applied to the treatment of high-concentration sewage such as landfill leachate

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