CN219194645U

CN219194645U - High-efficient acidizing cyanide recovery system

Info

Publication number: CN219194645U
Application number: CN202223588508.7U
Authority: CN
Inventors: 李帅
Original assignee: Yantai Jinpeng Mining Machinery Co ltd
Current assignee: Yantai Jinpeng Mining Machinery Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-16
Anticipated expiration: 2032-12-30

Abstract

The utility model belongs to the technical field of cyanide recovery, and particularly relates to a high-efficiency acidification cyanide recovery system which comprises an acid adding pipe, a pipeline, a mixing tank, a rotary distribution head, a first-stage conical vapor-liquid separation tower, a perforated grid, a second-stage conical vapor-liquid separation tower, an air inlet, cyanide-depleted recovery liquid, an adsorption tank and alkaline adsorption liquid, wherein the perforated grid is arranged in the first-stage conical vapor-liquid separation tower. According to the utility model, the two sections of the inverted cone-shaped vapor-liquid separation towers are arranged, wind moves from bottom to top, the diameter of the container is gradually reduced due to the inverted cone shape in the towers, the wind flow speed is gradually increased, the phenomenon that the wind speed of the cylindrical towers is lower and lower is avoided, and the split-layer wooden grid plates are arranged in the towers, so that the collected liquid is separated into small liquid drops to be continuously blown off by the upward wind to carry away the hydrogen cyanide gas, and meanwhile, the split-layer grid plates can prevent the liquid from falling down due to the fact that the upward wind is difficult to pass through the grid plates.

Description

High-efficient acidizing cyanide recovery system

Technical Field

The utility model relates to the technical field of cyanide recovery, in particular to a high-efficiency acidification cyanide recovery system.

Background

In industrial production, more cyanide-rich wastewater is generated particularly in the process of metal smelting, in order to protect the environment, the wastewater needs to be subjected to cyanide removal treatment, and in the treatment process, the wastewater containing cyanide needs to be subjected to acidification treatment through an acidification tower, but the conventional acidification tower is usually cylindrical, the motion power of the wind in the acidification tower is gradually weakened from bottom to top, so that the wind force is weakest at the position with the most cyanide gas at the top of the tower, and finally the escape efficiency of the cyanide gas from the acidification tower is lower, thereby influencing the treatment quality. Therefore, improvements are needed.

Disclosure of Invention

The utility model aims to provide a cyanide recovery system by an efficient acidification method, which solves the problem of low escape efficiency of hydrogen cyanide gas.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a high-efficient acidizing cyanide recovery system, includes acidification pipe, pipeline, mixed tank, rotatory distribution head, one section toper vapour-liquid separation tower, foraminiferous grid, two sections toper vapour-liquid separation towers, air intake, lean cyanide recovery liquid, adsorption tank, alkaline adsorption liquid, the inside of one section toper vapour-liquid separation tower is provided with foraminiferous grid, the inside of one section toper vapour-liquid separation tower is provided with two sections toper vapour-liquid separation towers, the air intake has been seted up on the two sections toper vapour-liquid separation towers, one end of one section toper vapour-liquid separation tower has the adsorption tank through pipe connection, be provided with the mixed tank on the one section toper vapour-liquid separation tower, be provided with acidification pipe on the mixed tank.

Preferably, the number of the perforated grids is multiple, the perforated grids are uniformly distributed in the tapered gas-liquid separation tower, and the perforated grids can slow down liquid flow.

Preferably, an alkaline adsorption liquid is arranged in the adsorption tank, and is in contact with a pipeline extending on the first-stage conical vapor-liquid separation tower, and the alkaline adsorption liquid can adsorb and recycle hydrogen cyanide gas.

Preferably, a rotary distribution head is arranged on an output pipe of the mixing tank, the rotary distribution head is arranged in the conical gas-liquid separation tower, and the rotary distribution head can disperse and spray the mixed cyanide-rich liquid in the conical gas-liquid separation tower.

Preferably, a pipeline is arranged on the acid adding pipe, cyanide-rich liquid flows in the pipeline, and the pipeline can add cyanide-rich liquid wastewater into the mixing tank.

Preferably, the two-stage conical vapor-liquid separation tower is internally provided with a cyanide-poor recovery liquid in a flowing mode, and the cyanide-poor recovery liquid is wastewater for removing cyanide ions.

The beneficial effects of the utility model are as follows:

according to the utility model, the two sections of the inverted cone-shaped vapor-liquid separation towers are arranged, wind moves from bottom to top, the diameter of the container is gradually reduced due to the inverted cone shape in the towers, the wind flow speed is gradually increased, the phenomenon that the wind speed of the cylindrical towers is lower and lower is avoided, and the split-layer wooden grid plates are arranged in the towers, so that the collected liquid is separated into small liquid drops to be continuously blown off by the upward wind to carry away the hydrogen cyanide gas, and meanwhile, the split-layer grid plates can prevent the liquid from falling down due to the fact that the upward wind is difficult to pass through the grid plates.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model.

In the figure: 1. an acid adding pipe; 2. a pipeline; 3. a mixing tank; 4. rotating the dispensing head; 5. a section of conical vapor-liquid separation tower; 6. a tape Kong Geshan; 7. a two-stage conical vapor-liquid separation tower; 8. an air inlet; 9. a cyanide-depleted recovery liquid; 10. an adsorption tank; 11. alkaline adsorption liquid.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1, a cyanide recovery system by an efficient acidification method comprises an acidification pipe 1, a pipeline 2, a mixing tank 3, a rotary distribution head 4, a first-stage conical vapor-liquid separation tower 5, a perforated grid 6, a second-stage conical vapor-liquid separation tower 7, an air inlet 8, a cyanide-poor recovery liquid 9, an adsorption tank 10 and an alkaline adsorption liquid 11, wherein the perforated grid 6 is arranged in the first-stage conical vapor-liquid separation tower 5, the number of the perforated grids 6 is multiple, the perforated grids 6 are uniformly distributed in the first-stage conical vapor-liquid separation tower 5, and the perforated grids 6 can slow down liquid flow.

Referring to fig. 1, a second-stage conical vapor-liquid separation tower 7 is disposed inside a first-stage conical vapor-liquid separation tower 5, an air inlet 8 is formed in the second-stage conical vapor-liquid separation tower 7, one end of the first-stage conical vapor-liquid separation tower 5 is connected with an adsorption tank 10 through a pipeline, a mixing tank 3 is disposed on the first-stage conical vapor-liquid separation tower 5, an acid adding pipe 1 is disposed on the mixing tank 3, an alkaline adsorption liquid 11 is disposed inside the adsorption tank 10, the alkaline adsorption liquid 11 contacts with a pipeline extending on the first-stage conical vapor-liquid separation tower 5, and the alkaline adsorption liquid 11 can adsorb and recover hydrogen cyanide gas.

Referring to fig. 1, a rotary distribution head 4 is disposed on an output pipe of a mixing tank 3, the rotary distribution head 4 is disposed inside a section of conical vapor-liquid separation tower 5, the rotary distribution head 4 can disperse and spray mixed cyanide-rich liquid inside the section of conical vapor-liquid separation tower 5, a pipeline 2 is disposed on an acid adding pipe 1, cyanide-rich liquid flows in the pipeline 2, cyanide-rich liquid wastewater can be added in the mixing tank 3 by the pipeline 2, cyanide-poor recovery liquid 9 flows in the interior of a section of conical vapor-liquid separation tower 7, and the cyanide-poor recovery liquid 9 is wastewater for removing cyanide ions.

The specific implementation process of the utility model is as follows: the sulfuric acid is filled into the mixing tank 3 through the acid filling pipe 1, the cyanide-containing sewage is added into the mixing tank 3 through the pipeline 2, the temperature of the cyanide-containing sewage is preferably greater than or equal to the boiling point of hydrocyanic acid and is 26.5 ℃, the sewage can be properly heated according to the season, the acid and the cyanide-containing sewage which are added according to the proportion are sprayed into the conical vapor-liquid separation tower through the rotatable distribution head 4 after the acidification reaction of the mixing tank 3, sewage liquid continuously passes through the staggered wooden porous grid 6 under the action of gravity and finally is collected in the cyanide-poor recovery liquid 9 to flow into the recovery device, meanwhile, the formed hydrocyanic acid gas is carried out of the conical tower by the ascending gas flow, then sodium hydroxide liquid with concentration of more than 15% is used for absorption reaction to generate sodium cyanide, the recovery rate of sodium cyanide in the whole system can reach more than 97%, the absorbed hydrocyanic acid waste gas can be returned into the conical tower through the air inlet 8, the absorption and the blowing off of the gas form a gas closed cycle, and the whole device is kept airtight, and the hydrogen cyanide-containing gas in the operation chamber and the surrounding air does not exceed the national standard.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high-efficient acidizing cyanide recovery system, includes add sour pipe (1), pipeline (2), mixing tank (3), rotatory distribution head (4), one section toper vapour-liquid separation tower (5), foraminiferous grid (6), two sections toper vapour-liquid separation tower (7), air intake (8), lean cyanide recovery liquid (9), adsorption tank (10), alkaline adsorption liquid (11), its characterized in that: the inside of one section toper vapour-liquid separation tower (5) is provided with area Kong Geshan (6), the inside of one section toper vapour-liquid separation tower (5) is provided with two sections toper vapour-liquid separation tower (7), air intake (8) have been seted up on two sections toper vapour-liquid separation tower (7), the one end of one section toper vapour-liquid separation tower (5) has adsorption tank (10) through the pipe connection, be provided with mixing tank (3) on one section toper vapour-liquid separation tower (5), be provided with on mixing tank (3) and add sour pipe (1).

2. A high efficiency acidulation cyanide recovery system according to claim 1, wherein: the number of the belts Kong Geshan (6) is plural, and the plurality of the belts Kong Geshan (6) are uniformly distributed inside the one-stage conical vapor-liquid separation column (5).

3. A high efficiency acidulation cyanide recovery system according to claim 1, wherein: an alkaline adsorption liquid (11) is arranged in the adsorption tank (10), and the alkaline adsorption liquid (11) is in contact with a pipeline extending on the one-section conical vapor-liquid separation tower (5).

4. A high efficiency acidulation cyanide recovery system according to claim 1, wherein: the output pipe of the mixing tank (3) is provided with a rotary distribution head (4), and the rotary distribution head (4) is arranged in the one-section conical gas-liquid separation tower (5).

5. A high efficiency acidulation cyanide recovery system according to claim 1, wherein: the acid adding pipe (1) is provided with a pipeline (2), and cyanide-rich liquid flows in the pipeline (2).

6. A high efficiency acidulation cyanide recovery system according to claim 1, wherein: the inside of the two-stage conical vapor-liquid separation tower (7) is provided with cyanide-depleted recovery liquid (9).