Multi-stirring efficient vulcanization reaction kettle

Abstract

The utility model relates to a kind of multi-stirring efficient vulcanization reaction kettle, including tank body, mixer and gas pipe, the liquid outlet of the mixer is connected with the side of tank body intercommunication;The side of tank body away from mixer is equipped with liquid outlet;Tank body bottom is equipped with slag outlet;Slag outlet is equipped with slag valve;The gas pipe is set in tank body top, and one end of gas pipe is inserted into tank body, and the other end is connected with gas conveying device.The utility model can mix waste acid and vulcanizing agent fully by mixer;And hydrogen sulfide gas is delivered to tank waste acid by gas pipe, so that hydrogen sulfide gas and waste acid react, conveniently recycle hydrogen sulfide gas, reduce the consumption of sodium hydrosulfide and sodium hydroxide, reduce processing cost.

Description

Technical Field

[0001] This utility model belongs to the field of copper smelting waste acid technology, and specifically relates to a multi-stirring high-efficiency sulfidation reactor. Background Technology

[0002] In non-ferrous metal smelting processes, waste acid often contains heavy metal ions (such as arsenic, copper, lead, and cadmium), which need to be converted into sulfide precipitates through a sulfidation reaction to achieve harmless treatment. Waste acid and a sulfiding agent are passed into a sulfidation reactor, where they react to form insoluble sulfide precipitates. After solid-liquid separation, the concentration of harmful metals in the wastewater is reduced, enabling waste acid reuse and eliminating environmental risks. However, sulfidation reactors generally suffer from uneven material distribution and high sulfiding agent consumption. Utility Model Content

[0003] The purpose of this invention is to provide a multi-stirring, high-efficiency sulfidation reactor that can fully mix waste acid and sulfiding agent and reduce the consumption of sulfiding agent.

[0004] To achieve the above objectives, the present invention employs a multi-stirring high-efficiency vulcanization reactor, comprising a tank body, a mixer, and a gas supply pipe.

[0005] The liquid outlet of the mixer is connected to one side of the tank body; the side of the tank body away from the mixer is provided with a liquid outlet; the bottom of the tank body is provided with a slag discharge port; a slag discharge valve is installed on the slag discharge port;

[0006] The gas delivery pipe is located on the top of the tank, with one end inserted into the tank and the other end connected to the gas delivery device.

[0007] Preferably, the bottom of the gas supply pipe inside the tank is connected to a gas distribution pipe; the gas distribution pipe is arranged horizontally, and the bottom of the gas distribution pipe is connected to several jet pipes; the height of the jet pipes is lower than the height of the liquid outlet.

[0008] Preferably, the tank body is vertically spaced with a first baffle and a second baffle, dividing the tank body into three reaction zones; the first baffle is located on the side of the tank body near the mixer; the second baffle is located between the first baffle and the liquid outlet; the bottom of the first baffle is fixed to the bottom of the inner wall of the tank body; the gas delivery pipe is located above the first baffle; and the top of the second baffle is fixed to the top of the inner wall of the tank body.

[0009] Preferably, each of the three reaction zones inside the tank is vertically equipped with a stirring shaft; each stirring shaft passes upward through the top of the tank and is connected to a stirring motor; multiple stirring blades are fixed on the stirring shaft.

[0010] Preferably, a cleaning hole is provided on the top of the tank; a cleaning valve is installed on the cleaning hole.

[0011] This invention enables the waste acid and sulfiding agent to be fully mixed through a mixer; and hydrogen sulfide gas is transported to the waste acid tank through a gas pipeline, so that the hydrogen sulfide gas reacts with the waste acid, facilitating the recycling of hydrogen sulfide gas, reducing the consumption of sodium hydrosulfide and sodium hydroxide, and reducing treatment costs.

[0012] This invention extends the reaction time of the mixture by setting a first baffle and a second baffle, thereby extending the reaction time of waste acid and hydrogen sulfide gas in the mixture and prolonging the residence time of hydrogen sulfide in the mixture, making the sulfidation reaction more complete.

[0013] This invention features stirring shafts and impellers in all three reaction zones to ensure thorough mixing and enhance the reaction between waste acid and sodium hydrosulfide and hydrogen sulfide gas. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the air distribution pipe and jet pipe structure. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1-3 As shown, a multi-stirred high-efficiency vulcanization reactor includes a tank body 1, a mixer 2, and a gas supply pipe 3.

[0019] The outlet of the mixer 2 is connected to one side of the tank 1. The mixer 2 can be a Venturi mixer. Waste acid is introduced into the first inlet 21 of the mixer 2, and sodium hydrosulfide solution is introduced into the second inlet 22. After the waste acid and sodium hydrosulfide solution are fully mixed by the mixer, they are introduced into the tank 1 for reaction. The tank 1 has an outlet 11 on the side away from the mixer 2. After the waste acid in the tank 1 reacts, the generated sulfide slag settles at the bottom of the tank 1, and the waste acid overflows from the outlet 11. The bottom of the tank 1 has a slag discharge port 12. A slag discharge valve is installed on the slag discharge port 12. After a certain amount of waste acid has been treated, the slag discharge valve is opened, and the sulfide slag settled at the bottom of the tank 1 and the remaining waste acid are discharged through the slag discharge port 12. In addition, a manhole 13 is provided on the side wall of the tank 1 to facilitate the inspection of the inside of the tank 1 during maintenance.

[0020] The gas transmission pipe 3 is located at the top of the tank 1, with one end inserted into the tank 1 and the other end connected to the gas transmission device 4. In this embodiment, the gas transmission device 4 is an explosion-proof centrifugal fan, which transports hydrogen sulfide gas to the gas transmission pipe 3. During the waste acid treatment process, the waste acid requires multi-stage treatment. The waste acid reacts with the sulfiding agent to generate hydrogen sulfide gas. The hydrogen sulfide gas forms sulfide precipitates with the heavy metal ions in the waste acid, and the hydrogen sulfide gas is prone to escape from the liquid surface. After recovering the escaped hydrogen sulfide, it needs to be absorbed and treated with sodium hydroxide. The recovered hydrogen sulfide gas is transported to the tank 1 through the gas transmission device 4, so that the hydrogen sulfide gas reacts with the waste acid again, which facilitates the recycling of hydrogen sulfide gas, reduces the consumption of sodium hydrosulfide and sodium hydroxide, and reduces treatment costs.

[0021] In this embodiment, the bottom of the gas supply pipe 3 inside the tank 1 is connected to a gas distribution pipe 31; the gas distribution pipe 31 is arranged horizontally, and the bottom of the gas distribution pipe 31 is connected to several jet pipes 32; the height of the jet pipes 32 is lower than the height of the liquid outlet 11, so that the jet pipes 32 are below the surface of the waste acid, which facilitates the delivery of hydrogen sulfide gas into the waste acid. The hydrogen sulfide gas is sprayed into the waste acid in the tank 1 through several jet pipes 32, so that the hydrogen sulfide gas reacts fully with the waste acid.

[0022] In this embodiment, the tank 1 is vertically spaced with a first baffle 14 and a second baffle 15, dividing the interior of the tank 1 into three reaction zones. The first baffle 14 is located on the side of the tank 1 closest to the mixer 2. The second baffle 15 is located between the first baffle 14 and the liquid outlet 11, wherein both sides of the first baffle 14 and the second baffle 15 are fixed to the inner wall of the tank 1. The bottom of the first baffle 14 is fixed to the bottom of the inner wall of the tank 1, and the height of its top is lower than the height of the liquid outlet 11. The gas delivery pipe 3 is located above the first baffle 14. The second baffle 15... The top is fixed to the top of the inner wall of the tank 1. After the mixture from the outlet 11 of the mixer 2 enters the tank 1, it flows downward from above the first baffle 14 into the space between the first baffle 14 and the second baffle 15. The gas pipe 3 sprays hydrogen sulfide gas into the mixture above the first baffle 14. The mixture overflows from the outlet 11 from below the second baffle 15. The first baffle 14 and the second baffle 15 extend the reaction time of the mixture on the one hand, and extend the reaction time of the waste acid and hydrogen sulfide gas in the mixture on the other hand, and extend the residence time of hydrogen sulfide in the mixture, so that the sulfidation reaction is more complete.

[0023] In this embodiment, each of the three reaction zones inside the tank 1 is vertically equipped with a stirring shaft 51; each stirring shaft 51 is connected to a stirring motor 52 through the top of the tank 1, and the stirring motor 52 drives the stirring shaft 51 to rotate; multiple stirring paddles 53 are fixed on the stirring shaft 51. By setting stirring shafts 51 and stirring paddles 53 in each of the three reaction zones, the mixture is fully stirred, and the reaction between waste acid and sodium hydrosulfide and hydrogen sulfide gas is enhanced.

[0024] In this embodiment, a cleaning hole 16 is provided on the top of the tank body 1; a cleaning valve is installed on the cleaning hole 16. After the sulfide slag and residual waste acid precipitated at the bottom of the tank body 1 are discharged, the cleaning valve is opened and the inside of the tank body 1 is cleaned through the cleaning hole 16 to clean the sulfide slag.

[0025] The method of using this utility model is as follows: Waste acid is introduced into the first inlet 21 of the mixer 2, and sodium hydrosulfide solution is introduced into the second inlet 22 of the mixer 2. After the mixer 2 mixes the waste acid and sodium hydrosulfide solution, the mixture enters the tank 1. The stirring motor 52 is turned on, and the gas supply device 4 is turned on at the same time. The gas supply pipe 3 sprays out hydrogen sulfide gas. After the liquid is stirred for the first time, it comes into contact with the hydrogen sulfide gas. The liquid crosses the first baffle 14 and enters between the first baffle 14 and the second baffle 15. The reaction is enhanced by secondary stirring. Finally, the liquid overflows from the bottom of the second baffle 15 from the outlet 11.

Claims

1. A multi-stirred, high-efficiency vulcanization reactor, characterized in that, It includes a tank (1), a mixer (2), and a gas pipeline (3). The outlet of the mixer (2) is connected to one side of the tank (1); the tank (1) is provided with an outlet (11) on the side away from the mixer (2); the bottom of the tank (1) is provided with a slag discharge port (12); a slag discharge valve is installed on the slag discharge port (12); The gas delivery pipe (3) is located on the top of the tank (1), with one end of the gas delivery pipe (3) inserted into the tank (1) and the other end connected to the gas delivery device (4).

2. The multi-stirred high-efficiency vulcanization reactor according to claim 1, characterized in that, The bottom of the gas supply pipe (3) inside the tank (1) is connected to the gas distribution pipe (31); the gas distribution pipe (31) is arranged horizontally, and the bottom of the gas distribution pipe (31) is connected to several jet pipes (32); the height of the jet pipes (32) is lower than the height of the liquid outlet (11).

3. The multi-stirred high-efficiency vulcanization reactor according to claim 1, characterized in that, The tank (1) is vertically spaced with a first baffle (14) and a second baffle (15) to divide the interior of the tank (1) into three reaction zones. The first baffle (14) is located on the side of the tank (1) near the mixer (2). The second baffle (15) is located between the first baffle (14) and the liquid outlet (11). The bottom of the first baffle (14) is fixed to the bottom of the inner wall of the tank (1). The gas pipe (3) is located above the first baffle (14). The top of the second baffle (15) is fixed to the top of the inner wall of the tank (1).

4. The multi-stirred high-efficiency vulcanization reactor according to claim 3, characterized in that, The three reaction zones inside the tank (1) are each vertically equipped with a stirring shaft (51); each stirring shaft (51) passes upward through the top of the tank (1) and is connected to a stirring motor (52); multiple stirring paddles (53) are fixed on the stirring shaft (51).

5. The multi-stirred high-efficiency vulcanization reactor according to claim 1, characterized in that, The tank (1) has a cleaning hole (16) on its top; a cleaning valve is installed on the cleaning hole (16).

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