CN-121974451-A - Low-energy water treatment device with synergistic desalination and organic matter removal functions

CN121974451ACN 121974451 ACN121974451 ACN 121974451ACN-121974451-A

Abstract

A low-energy water treatment device with synergistic desalination and organic matter removal relates to the technical field of sewage treatment. An intermediate chamber is formed between two electrode plates connected with a direct current power supply, a titanium net is arranged between the two electrode plates, an inclined serpentine flow passage is prefabricated on the inner side surface of each electrode plate, an ion exchange membrane is fixedly attached to the electrode plates, a water storage tank is communicated with the bottom of the intermediate chamber, a water inlet pump is arranged on the top of the intermediate chamber, a high-level oxidation filtration column component is communicated with the water storage tank through gravity flow, electrode slurry formed by mixing nano graphitized hollow mesoporous carbon, carbon black and sodium chloride solution is stored in the water storage tank, the bottom of the inclined serpentine flow passage is communicated with a feed pump, and the top of the inclined serpentine flow passage is communicated with the water storage tank. The natural zeolite loaded iron-copper-chlorine oxide filler is used for advanced oxidation under mild conditions, and the effective coupling of the flow capacitor deionization component and the advanced oxidation filter column component is combined with the sewage gravity flow circulation connection, so that the low energy consumption collaborative performance of desalination and organic deep treatment is realized.

Inventors

ZHOU SIMIN
WANG GUANGZHI
HUANG LIKUN
ZHAO RUI
LU XINGYU
LI CHAOPENG

Assignees

哈尔滨工业大学

Dates

Publication Date: 20260505
Application Date: 20260318

Claims (8)

1. A low-energy water treatment device with synergistic desalination and organic matter removal is characterized by comprising a flowing capacitor deionization component, an advanced oxidation filter column component, a water supply system and a slurry supply system; The mobile capacitor deionization assembly comprises a direct current power supply (1), an anion exchange membrane (4), a cation exchange membrane (5) and two electrode plates (3), wherein the two electrode plates (3) are arranged in parallel, the edges between the two electrode plates are sealed to form an intermediate chamber (6), a titanium net (7) is arranged in the intermediate chamber (6), the positive electrode and the negative electrode of the direct current power supply (1) are respectively electrically connected with the two electrode plates (3) to form a negative plate and a positive plate, an inclined snake-shaped flow channel (26) is prefabricated in the intermediate area of the inner side surface of each electrode plate (3), and the anion exchange membrane (4) and the cation exchange membrane (5) are respectively attached and fixed on the inner side surfaces of the positive plate and the negative plate; The high-grade oxidation filter column assembly comprises a water distributor (16), an organic glass filter column (17), a reaction filter layer (18) and a water passing cushion layer (19), wherein a water inlet (15) and a water outlet (20) are respectively formed in the top end and the bottom end of the organic glass filter column (17), the water distributor (16) is arranged at the inner top of the organic glass filter column (17), the reaction filter layer (18) is filled in the inner bottom of the organic glass filter column (17), and the water passing cushion layer (19) is arranged between the reaction filter layer (18) and the water outlet (20); The water supply system comprises a water storage tank (14), a water inlet pipe (21), a water outlet pipe (22) and a connecting pipe (23), wherein the water storage tank (14) is communicated with the bottom of the middle chamber (6) through the water inlet pipe (21) and is provided with a water inlet pump (13), the connecting pipe (23) is used for communicating the top of the middle chamber (6) with the water inlet (15) through gravity flow, and the water outlet pipe (22) is used for communicating the water outlet (20) with the water storage tank (14); The slurry supply system comprises a storage tank (11), two feeding pipes (24) and two discharging pipes (25), wherein electrode slurry (10) is stored in the storage tank (11), the electrode slurry (10) is formed by mixing nano graphitized hollow mesoporous carbon (8), carbon black (9) and sodium chloride solution, the storage tank (11) is communicated with the bottom ends of inclined serpentine flow passages (26) of two electrode plates (3) respectively through the two feeding pipes (24) and is provided with a feeding pump (12), and the top ends of the inclined serpentine flow passages (26) of the two electrode plates (3) are communicated with the storage tank (11) respectively through the two discharging pipes (25).
2. The device for water treatment with low energy consumption by combining desalination and organic matter removal as set forth in claim 1, wherein an included angle of 45 degrees is formed between a flow passage center line of the inclined serpentine flow passage (26) and an edge line of the electrode plate (3).
3. The low-energy water treatment device combining desalination and organic matter removal as claimed in claim 1, wherein the water passing cushion layer (19) is composed of a peripheral perforated circular plate and a middle perforated circular plate which are arranged in an upper-lower gap mode and staggered in perforated positions.
4. A water treatment device with low energy consumption in combination with desalination and organic matter removal as set forth in claim 1, wherein the reaction filter layer (18) is made of natural zeolite loaded with iron-copper oxychloride compound as filler, and the particle size of the filler is 1-2mm.
5. A low energy water treatment apparatus with combined desalination and organic matter removal as claimed in claim 1, wherein the mesh size of the titanium mesh (7) is 60 mesh.
6. The low-energy water treatment device with synergistic desalination and organic matter removal as claimed in claim 1, wherein the particle size of the nano graphitized hollow mesoporous carbon (8) is 500nm.
7. A low energy water treatment apparatus combining desalination and organic matter removal as claimed in claim 1, wherein said water storage tank (14) contains a mixed solution of wastewater to be treated and hydrogen peroxide.
8. A desalination and organic matter removal co-ordinated low energy water treatment device as claimed in claim 1, wherein the flow capacitor deionization module and advanced oxidation filtration column module are connected by gravity flow.

Description

Low-energy water treatment device with synergistic desalination and organic matter removal functions Technical Field The invention relates to the technical field of sewage treatment, in particular to a low-energy water treatment device with synergistic desalination and organic matter removal. Background Along with the aggravation of the problem of global water resource shortage and the continuous improvement of the sewage and wastewater discharge standard, the development of low-energy-consumption and high-efficiency water treatment technology has become a research hot spot in the field of sewage treatment. In the existing sewage treatment process, desalination and organic matter removal are usually designed and operated as two mutually independent treatment units, and the energy consumption and cost of the whole treatment flow are high. Currently common desalination techniques mainly include thermal desalination, membrane desalination, electrical desalination, and the like. The technology such as reverse osmosis and mechanical vapor compression is widely applied to engineering, but the problems of high energy consumption, high equipment investment and high operation cost are generally existed. The capacitive deionization technology can be operated under the conditions of low voltage and room temperature, does not need to add chemical agents, has the remarkable advantages of low energy consumption and environmental friendliness, however, the adsorption capacity of the traditional fixed electrode structure is limited, and the desalination capacity is limited, so that the capacitive deionization technology is generally only suitable for treating low-salinity sewage. In order to overcome the problem of limited adsorption capacity of the fixed electrode, a mobile capacitance deionization technology has been developed, which uses pumpable carbon-based suspension as a mobile electrode to replace the traditional fixed electrode structure, so that the electrode material can be continuously updated in the system, the higher or even infinite ion adsorption capacity can be theoretically realized, and continuous desalination operation can be realized through regenerating the mobile electrode outside the device, but the long-term operation stability and engineering maturity of the technology still need to be improved. On the other hand, the sewage and wastewater often contains organic matters which are difficult to biodegrade, especially industrial wastewater, and the organic matters are removed through an advanced treatment process. The existing organic matter deep treatment technology mainly comprises a membrane separation technology, a high-grade oxidation technology and the like, but the problems of high energy consumption and high operation cost are common. Especially, the advanced oxidation technology often depends on an external oxidant and a metal catalyst, so that the secondary pollution risk of inorganic ions or metal ions is easily introduced while the removal efficiency of organic matters is improved, and the safety of the effluent quality is adversely affected. In conclusion, the problems of low efficiency, high cost, easy secondary pollution and the like of complex water pollution and wastewater treatment caused by the separation design of desalination and organic matter deep treatment and the energy consumption and performance defects of each technology in the existing water treatment technology. Therefore, it is needed to develop a water treatment device capable of realizing the co-operation of desalination and deep organic treatment under the condition of low energy consumption so as to meet the requirements of efficient and stable treatment of sewage and wastewater under the condition of complex water quality. Disclosure of Invention In order to solve the defects in the prior art, the invention provides a low-energy-consumption water treatment device with synergetic desalination and organic matter removal, which realizes the synergetic low-energy consumption implementation of the deep treatment of the desalination and the organic matter by effectively coupling a flow capacitance deionization component and an advanced oxidation filter column component and combining with the gravity flow circulation connection of sewage. In order to achieve the aim, the invention adopts the following technical scheme that the low-energy water treatment device with synergetic desalination and organic matter removal comprises a flowing capacitor deionization component, an advanced oxidation filter column component, a water supply system and a slurry supply system; The flow capacitor deionization assembly comprises a direct current power supply, an anion exchange membrane, a cation exchange membrane and two electrode plates, wherein the two electrode plates are arranged in parallel, the edges between the two electrode plates are closed to form an intermediate chamber, a titanium net is arranged in the intermediate chamber,