CN1563497A

CN1563497A - Electrobath for treating sewerage

Info

Publication number: CN1563497A
Application number: CN 200410033681
Authority: CN
Inventors: 汪家道; 陈大融; 李学敏; 刘兵; 刘峰斌
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2004-04-16
Filing date: 2004-04-16
Publication date: 2005-01-12
Anticipated expiration: 2024-04-16
Also published as: CN1303254C

Abstract

This invention relates to an electrolytic bath used in processing polluted water including a top cover, bottom cover, a upper base, a lower base and multiple electrodes. The two covers are enclosed mutually to form an inner cavity and electrode wiring terminals and water pipe joints are set on the two covers separately. The terminals and the base are inter-linked by adjusting screws, the two bases are adhered with adjacent electrodes, the multiple electrodes are parallel in the inner cavity of the electrolytic bath mounted with the terminals coaxially, pads are set between the electrodes.

Description

A kind of electrolyzer that is used for sewage disposal

Technical field

The present invention relates to a kind of electrolyzer that is used for sewage disposal, relate in particular to the sewage disposal electrolyzer of the metal-doped diamond thin of a kind of usefulness, belong to the environmental improvement technical field as electrode.

Background technology

Along with increasing sharply of rapid development of economy and population, wastewater discharge increases day by day, and environmental pollution is serious day by day, and environment protection and conservation of resources have become the subject matter and the key factor of Economic development.China is a lack of water country, and the water that is on the rise pollutes and is tantamount to make the matter worse, and makes the considerable part of original limited water resource lose use value.Because the high-concentration waste water of the discharging of the industries such as heavy metal, compound and organic waste water etc., especially chemistry, food, agricultural chemicals, dyestuff and medicine in the sewage, colourity height, toxicity are big, contain large number of biological difficult degradation composition, use traditional method to be difficult to locate.

Electrochemical process is playing a significant role aspect the recovery of plant effuent or the processing, particularly aspect the bio-compatibility of toxic pollutant in reducing water or poisonous pollution.But also there is following shortcoming and defect in the electrochemistry sewage disposal device at present:

(1) inertia is bad, and electrochemical window is narrow, the circulation ratio of electrode and poor stability, and the steady state current time of response is long, so electrode life is short, sewage treating efficiency and clearance are low.

(2) the electrochemical oxidation index of electrode is on the low side, and electrode performance is bad, sometimes can not exhaustive oxidation for hard-degraded substance, can only be oxidized into the lower material of being convenient to biochemical degradation of toxicity; Sometimes the intermediate product toxicity of Chan Shenging is bigger than former target substance toxicity.

In recent years, at different electrodes, designed dissimilar apparatus for electrochemical treatment, its key distinction is the structure of its electrolyzer.The design of electrolyzer mainly contains following three purposes:

(1) improves mass transfer: under the situation of given electrolyzer volume, adopt relatively little electrode area, improve current density by electrode being placed kinestate or increase help to disturb device.Typical example is pump electrolyzer, stirring rod electrolyzer and electrode vibration or ionogen vibration electrolyzer.

(2) manage to provide broad-area electrode: for the less electrolyzer of volume,, proposed many cathode electrolytic cells, Switzerland-effect electrolyzer and expansion electrolytic surface electrolyzer in order to improve electrode area.

(3) improve mass transfer coefficient and expansion electrode area: reach this effect by using three-diemsnional electrode.As: many porosities flow through the formula electrolyzer, packed bed electrolyzer, fluidized-bed electrolyzer.

Above the electrolyzer of various structures also have the not high enough shortcoming of sewage treating efficiency.

Summary of the invention

The objective of the invention is to propose a kind of electrolyzer that is used for sewage disposal, metal-doped diamond film electrode is applied in the electrode of electrochemistry sewage disposal, with further raising sewage treating efficiency.

The electrolyzer that is used for sewage disposal that the present invention proposes comprises loam cake, lower cover, goes up base stage, following base stage and a plurality of electrode.Loam cake, lower cover connection sealed to each other back constitutes the electrolyzer inner chamber, loam cake and under cover and be respectively equipped with electrode terminal and water pipe head.Electrode terminal and base stage link mutually by setting nut, and upper and lower base stage and adjacent electrode bond mutually, a plurality of electrodes electrolyzer inner chamber that places parallel to each other, and with the coaxial installation of terminal stud, be provided with pad between the electrode.

Be the metal-doped diamond film electrode of single face with the mutual agglutinating electrode of base electrode in the above-mentioned electrolyzer, other is a double-sided metal doped diamond membrane electrode.

The electrolyzer that is used for the difficult degradation sewage disposal that the present invention proposes has following characteristics and advantage:

1, used metal-doped diamond film electrode has low-resistivity, zero high inertia of burn into and high electrochemical window, so the electrolyzer long service life, the sewage treating efficiency height;

2, because the high electrochemical window of used metal-doped diamond film electrode, to the clearance height of organism in the waste water and inorganics;

3, the waste disposal plant that is made of electrolyzer of the present invention, therefore compact construction, stable has reduced cost of sewage disposal significantly.

Description of drawings

Fig. 1 is the structural representation of the electrolyzer that is used for sewage disposal that designs of the present invention.

Fig. 2 is the A-A sectional view of Fig. 1.

Among Fig. 1 and Fig. 2, the 1st, lower cover, the 2nd, double-sided metal doped diamond membrane electrode, the 3rd, the metal-doped diamond film electrode of single face, the 4th, base electrode, the 5th, loam cake, the 6th, electrode terminal, 7 and 8 is respectively setting nut, the 9th, water pipe head, the 10th, electrode pads, the 11st, waterpipe, the 12nd, electrolyzer inner chamber, the 13rd, tank, the 14th, seal washer, the 15th, passage.

Embodiment

The electrolyzer that is used for the difficult degradation sewage disposal that the present invention proposes, its structure comprise loam cake 5, lower cover 1, go up base stage 4, following base stage and a plurality of electrode as shown in Figure 1.Loam cake 5, lower cover 1 connection sealed to each other back constitute the electrolyzer inner chamber, are respectively equipped with electrode terminal 6 and water pipe head 9 on loam cake 5 and the lower cover 1.Electrode terminal 6 link by setting

nut

7,8 mutually with base stage 4, and upper and lower base stage 4 and adjacent electrode bond mutually, a plurality of electrodes electrolyzer inner chamber that places parallel to each other, and with terminal stud 6 coaxial installations, be provided with pad 10 between the electrode.

Be the metal-doped diamond film electrode of single face with base electrode 4 mutual agglutinating electrodes 3 in the above-mentioned electrolyzer, other electrode, electrode 2 is a double-sided metal doped diamond membrane electrode as shown in FIG..

The working process of apparatus of the present invention: sewage enters interelectrode electrolyzer inner chamber 12 through waterpipe 11, tank 13 and passage 15 in the loam cake 5 successively by water pipe head 9; Electrochemical reaction takes place in sewage under the electrode effect by the electrolyzer inner chamber time, make pollutants in sewage be broken down into carbonic acid gas, water and water-fast intermediate product etc.; The sewage of handling through electrode is discharged outside the electrolyzer by water pipe head after passing through passage, tank and waterpipe in the lower cover 1 successively, enter in the follow-up treatment tank, after deposition or overanxious after finish the entire sewage treating processes.

Claims

1, a kind of electrolyzer that is used for the difficult degradation sewage disposal is characterized in that this electrolyzer comprises loam cake, lower cover, goes up base stage, following base stage and a plurality of electrode; Described loam cake, lower cover connection sealed to each other back constitutes the electrolyzer inner chamber, loam cake and under cover and be respectively equipped with electrode terminal and water pipe head; Described electrode terminal and base stage link mutually by setting nut, and upper and lower base stage and adjacent electrode bond mutually, a plurality of electrodes electrolyzer inner chamber that places parallel to each other, and with the coaxial installation of terminal stud, be provided with pad between the electrode.

2, electrolyzer as claimed in claim 1 is characterized in that being the metal-doped diamond film electrode of single face with the mutual agglutinating electrode of base electrode wherein.

3, electrolyzer as claimed in claim 1 is characterized in that the electrode with beyond the mutual agglutinating electrode of base electrode wherein is a double-sided metal doped diamond membrane electrode.