CN215102538U

CN215102538U - Reactor for electrolyzing cyanide-containing wastewater by using packed bed

Info

Publication number: CN215102538U
Application number: CN202120511493.0U
Authority: CN
Inventors: 丁成; 迟崇哲; 兰馨辉
Original assignee: Changchun Gold Research Institute
Current assignee: Changchun Gold Research Institute
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2021-12-10
Anticipated expiration: 2031-03-11

Abstract

The utility model belongs to the technical field of reactors for processing cyanide-containing wastewater, in particular to a reactor for electrolyzing cyanide-containing wastewater by a packed bed; the sealing cover is fixed at the top of the inner insulating tank body, an exhaust port is formed in the sealing cover, an upper water inlet and a lower water outlet are formed in the inner insulating tank body, the inner part of the inner insulating tank body is divided by a water outlet overflow plate and a water inlet overflow plate to form a water inlet settlement buffer area, a packed bed electrolytic area and a water outlet buffer area, a plurality of groups of cathode and anode partition plates are arranged in the packed bed electrolytic area, every two groups of cathode and anode partition plates are separated by an electrode partition plate, a semiconductor packed bed is arranged between every two groups of cathode and anode partition plates, an aeration device is arranged at the bottom of the semiconductor packed bed, and each group of cathode and anode partition plates are respectively connected with an anode conductive row and a cathode conductive row; the utility model relates to a fill bed electrolysis cyanide wastewater reactor suitable for electrolysis method handles cyanide wastewater adopts a semiconductor bed as middle positive pole, and its effect is like countless negative pole and positive pole, can decompose the cyanide completely.

Description

Reactor for electrolyzing cyanide-containing wastewater by using packed bed

Technical Field

The utility model belongs to the technical field of handle cyanide wastewater reactor, concretely relates to packed bed electrolysis cyanide wastewater reactor.

Background

The cyanide-containing wastewater has high toxicity and must be treated before being discharged. Polarographic analysis shows CN^-Is an electrochemical active substance, so the cyanide-containing waste water can be treated by an electrochemical method. Wherein the anode is directly oxidized by using CN in the wastewater^-By using an insoluble anode, CN^-The anode is oxidized and damaged, thereby achieving the purpose of treatment. However, the currently used flat plate electrode has small polar water ratio, poor mass transfer condition and low processing capacity of the electrolytic cell in unit volume.

Therefore, only as the pretreatment of high-concentration wastewater, the packed bed electrode is a novel electrochemical reactor, granular or clastic packing is added between the electrodes of the traditional two-dimensional reactor, the action of external voltage is utilized to repolarize the packing particles to form a new first pole (third pole), and the third poles form countless micro electrolytic tanks, so that the effective area of electrochemical reaction and the generation amount of active groups in the reactor are greatly increased, the electrochemical reactor participates in the direct oxidation or indirect oxidation reaction of organic pollutants, and the electrocatalysis efficiency is greatly improved. Meanwhile, the filler in the electrolytic cell effectively shortens the mass transfer distance of pollutants and changes the internal structure of the reactor, thereby solving the problems of small reaction surface area ratio, poor mass transfer effect, low current efficiency and the like of the two-dimensional flat plate electrode. However, at present, a reactor which adopts a packed bed for the electrochemical treatment of the cyanide-containing wastewater does not exist, so the reactor which is developed and designed by adopting the packed bed electrochemical treatment technology can be used for cyaniding and gold extraction in the gold industry to generate a large amount of cyanide-containing wastewater.

Disclosure of Invention

In order to overcome the problems, the utility model provides a packed bed electrolysis cyanide-containing wastewater reactor, which is a packed bed electrolysis cyanide-containing wastewater reactor suitable for treating cyanide-containing wastewater by an electrolysis method, and adopts a semiconductor bed as an intermediate anode which acts like an infinite cathode and anode and can completely decompose cyanide.

A reactor for electrolyzing cyanide-containing wastewater by a packed bed comprises an internal insulation tank body 2, a water outlet overflow plate 21, a water inlet overflow plate 22, cathode and anode clapboards, a semiconductor packed bed 6, an anode conducting bar 7, a cathode conducting bar 8, an aeration device 9 and a sealing cover 10, wherein the sealing cover 10 is fixed at the top of the internal insulation tank body 2 and is provided with an exhaust port 101, the side wall of the internal insulation tank body 2 is provided with an upper water inlet 23 and a lower water outlet 24, the internal insulation tank body 2 is internally divided by the water outlet overflow plate 21 and the water inlet overflow plate 22 to form a water inlet settlement buffer zone 11, a packed bed electrolysis zone and a water outlet buffer zone 12, wherein the area between the water outlet overflow plate 21 and the water inlet overflow plate 22 fixed on the internal bottom plate of the internal insulation tank body 2 is the packed bed electrolysis zone, a plurality of groups of cathode and anode clapboards are arranged in the packed bed electrolysis zone, wherein each two groups of cathode and anode clapboards are separated by an electrode clapboard 5, a semiconductor filling bed 6 is arranged between the graphite anode plate 3 and the stainless steel cathode plate 4 of each group of cathode-anode separators, an aeration device 9 is arranged at the bottom of the semiconductor filling bed 6, and the graphite anode plate 3 and the stainless steel cathode plate 4 of each group of cathode-anode separators are respectively connected with an anode conducting bar 7 and a cathode conducting bar 8.

An outer protective layer 1 is sleeved outside the inner insulating tank body 2.

The anode conducting bar 7 and the cathode conducting bar 8 respectively penetrate through the inner insulating tank body 2 and the outer protective layer 1 and are externally connected with a power supply.

The left end and the right end inside the inner insulation tank body 2 are respectively fixed with a water outlet overflow plate 21 and a water inlet overflow plate 22, and the tops of the water outlet overflow plate 21 and the water inlet overflow plate 22 are respectively provided with a water outlet diversion filter screen edge 26 and a water inlet diversion filter screen edge 27.

The inboard of going out water overflow plate 21 and the overflow plate 22 of intaking all is equipped with a plurality of plate electrode draw-in grooves 25, and graphite anode plate 3 and stainless steel negative plate 4 control both ends joint respectively in going out water overflow plate 21 and the inboard plate electrode draw-in groove 25 that corresponds of overflow plate 22 of intaking.

The left end and the right end of the electrode separator 5 are respectively fixed on the water outlet overflow plate 21 and the water inlet overflow plate 22.

The height of the semiconductor filling bed 6 is lower than the water outlet diversion filter screen edge 26 and the water inlet diversion filter screen edge 27.

The aeration device 9 is an aerator.

The utility model has the advantages that:

the utility model discloses a broken cyanogen of filling bed electrolysis, its countless negative pole and positive pole principle have shortened the mass transfer distance of pollutant effectively and can decompose the cyanide fast completely, and the filling bed can use by activating repeatedly, and equipment structure is simple, maintains the operation simply, and the consumption is lower, is administering the positive effect in the gold mine cyanide-containing waste water treatment trade at the electrolysis.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic sectional view of the present invention.

Wherein: 1-an outer protective layer; 101-exhaust port; 2-an internal insulation tank body; 21-water outlet overflow plate 22-water inlet overflow plate; 23-an upper inlet; 24-a lower water outlet; 25-electrode plate clamping groove; 26-the water outlet diversion filter screen edge; 27-water inlet diversion filter screen edge; 3-graphite anode; 4-stainless steel cathode; 5-electrode separator; 6-semiconductor packed bed; 7-anode conducting bar; 8-cathode conducting bar; 9-an aeration device; 10-sealing cover; 11-a water inlet settling buffer zone; 12-packed bed electrolysis zone and effluent buffer zone.

Detailed Description

As shown in fig. 1 and fig. 2, a reactor for electrolyzing cyanide-containing wastewater by using a packed bed comprises an internal insulation tank body 2, a water outlet overflow plate 21, a water inlet overflow plate 22, a cathode-anode separator, a semiconductor packed bed 6, an anode conductive bar 7, a cathode conductive bar 8, an aeration device 9 and a sealing cover 10, wherein the sealing cover 10 is fixed on the top of the internal insulation tank body 2 and is provided with an exhaust port 101, and the side wall of the internal insulation tank body 2 is provided with an upper water inlet 23 and a lower water outlet 24, namely: an upper water inlet 23 is arranged on the side wall of one end of the inner insulating tank body 2, a lower water outlet 24 is arranged on the side wall of the other end, and the interior of the inner insulation tank body 2 is divided by a water outlet overflow plate 21 and a water inlet overflow plate 22 to form three areas of a water inlet settlement buffer area 11, a packed bed electrolysis area and a water outlet buffer area 12, wherein the area between the water outlet overflow plate 21 and the water inlet overflow plate 22 fixed on the bottom plate in the inner insulating tank body 2 is a packed bed electrolytic area, a plurality of groups of cathode and anode clapboards are arranged in the packed bed electrolytic area, wherein every two groups of cathode and anode separators are separated by an electrode separator 5, a semiconductor filling bed 6 is arranged between the graphite anode plate 3 and the stainless steel cathode plate 4 of each group of cathode and anode separators, the bottom of the semiconductor filling bed 6 is provided with an aeration device 9, and the graphite anode plate 3 and the stainless steel cathode plate 4 of each group of cathode-anode separator are respectively connected with an anode conductive bar 7 and a cathode conductive bar 8.

The semiconductor packed bed 6 is cylindrical or spherical millimeter-sized carbon particles.

The semiconductor packed bed 6 is cylindrical or spherical millimeter-sized graphite particles.

The aeration device 9 is an aerator.

The working process of the embodiment:

cyanide-containing wastewater enters the water inlet settlement buffer zone 11 through the water inlet 23 for settlement, then enters the packed bed electrolytic zone consisting of the graphite anode 3, the stainless steel cathode 4, the electrode separator 5 and the semiconductor packed bed 6 after being filtered by the water outlet diversion filter screen edge 26 and the water inlet diversion filter screen edge 27 of the water inlet overflow plate 22, the anode conductive row 7 connected with the graphite anode plate 3 and the cathode conductive row 8 connected with the stainless steel cathode 4 start to supply power, the cyanide-containing wastewater starts electrolytic reaction after filling the semiconductor packed bed 6, cyanide is oxidized and decomposed on a plurality of anodes and graphite anodes of the semiconductor packed bed 6, water after electrolytic harmless treatment enters the water outlet buffer zone 12 for buffering settlement after being filtered by the water outlet diversion filter screen edge 26 and the water inlet diversion filter screen edge 27 of the water outlet overflow plate 21 and then is discharged from the water outlet 24, and the semiconductor packed bed 6 for electrolytic treatment for a long time can generate a hardening phenomenon, at this time, the aeration device 9 is started to perform aeration activation on the semiconductor packed bed 6, and the gas is discharged through the top gas outlet 101 of the sealing cover 10.

Claims

1. A reactor for electrolyzing cyanide-containing wastewater by using a packed bed is characterized by comprising an internal insulation tank body (2), a water outlet overflow plate (21), a water inlet overflow plate (22), a cathode-anode separator, a semiconductor packed bed (6), an anode conductive bar (7), a cathode conductive bar (8), an aeration device (9) and a sealing cover (10), wherein the sealing cover (10) is fixed at the top of the internal insulation tank body (2) and is provided with an exhaust port (101), the side wall of the internal insulation tank body (2) is provided with an upper water inlet (23) and a lower water outlet (24), the internal part of the internal insulation tank body (2) is divided by the water outlet overflow plate (21) and the water inlet overflow plate (22) to form three areas, namely a water inlet settlement buffer area (11), a packed bed electrolytic area and a water outlet buffer area (12), wherein the area between the water outlet overflow plate (21) and the water inlet plate (22) fixed on the internal bottom plate of the internal insulation tank body (2) is a packed bed electrolytic area, be equipped with multiunit negative and positive pole baffle in the filling bed electrolysis region, wherein all separate through electrode baffle (5) between per two sets of negative and positive pole baffles, semiconductor filling bed (6) have all been placed between graphite anode plate (3) and the stainless steel negative plate (4) of every negative and positive pole baffle of group, the bottom of semiconductor filling bed (6) is equipped with aeration equipment (9), and graphite anode plate (3) and stainless steel negative plate (4) of every negative and positive pole baffle of group are connected with positive pole electricity-conducting bar (7) and negative pole electricity-conducting bar (8) respectively.

2. A reactor for filled bed electrolysis of cyanide-containing wastewater according to claim 1, characterized in that the exterior of the inner insulating tank body (2) is sleeved with an outer protective layer (1).

3. The reactor for electrolyzing cyanide-containing wastewater according to claim 2, wherein the anode conducting bar (7) and the cathode conducting bar (8) are respectively connected with an external power supply after penetrating through the inner insulating tank body (2) and the outer protective layer (1).

4. The reactor for electrolyzing cyanide-containing wastewater according to claim 3, wherein the left and right ends of the inside of the inner insulating tank (2) are respectively fixed with a water outlet overflow plate (21) and a water inlet overflow plate (22), and the top of the water outlet overflow plate (21) and the top of the water inlet overflow plate (22) are respectively provided with a water outlet diversion filter screen edge (26) and a water inlet diversion filter screen edge (27).

5. The reactor for electrolyzing cyanide-containing wastewater according to claim 4, wherein the effluent overflow plate (21) and the influent overflow plate (22) are provided with a plurality of electrode plate slots (25) at their inner sides, and the graphite anode plate (3) and the stainless steel cathode plate (4) are respectively clamped at their left and right ends in the corresponding electrode plate slots (25) at the inner sides of the effluent overflow plate (21) and the influent overflow plate (22).

6. A reactor for filled bed electrolysis of cyanide-containing wastewater according to claim 5, characterized in that the left and right ends of the electrode separator (5) are fixed on the water outlet overflow plate (21) and the water inlet overflow plate (22), respectively.

7. A reactor for electrolyzing cyanide-containing waste water in packed bed according to claim 6, characterized in that the height of the semiconductor packed bed (6) is lower than the water outlet guide filter net edge (26) and the water inlet guide filter net edge (27).

8. A reactor for filled bed electrolysis of cyanide-containing wastewater according to claim 7 characterized in that said aeration means (9) is an aerator.