Arsenic sulfide slag constant-pressure reaction device capable of preventing liquid backflow

Abstract

The utility model provides an arsenic sulfide slag constant-pressure reaction device capable of preventing liquid backflow. The arsenic sulfide slag constant-pressure reaction device comprises a reaction tank body, a buffer tank and a lifting mechanism, a vertically extending stirring frame is arranged in the reaction tank body, and a stirring driving device for driving the stirring frame to rotate is arranged on the reaction tank body; the buffer tank is arranged above the reaction tank body, the discharge end at the lower end of the buffer tank is communicated with the feed port of the reaction tank body through a bendable hose, and the feed port is formed in the buffer tank and used for being connected with external feeding equipment; the lifting mechanism is arranged on the upper surface of the reaction tank body and can stretch out and draw back in the vertical direction, and the upper end of the lifting mechanism is fixedly connected with the buffer tank; the gas inlet pipe and the gas outlet pipe are arranged on the reaction tank body, and the pressure sensors are arranged on the gas inlet pipe and the gas outlet pipe, so that liquid backflow can be avoided through the buffer tank, and meanwhile, the height of the buffer tank can be quickly adjusted to adapt to a complicated working environment.

Description

Technical Field

[0001] This utility model relates to the treatment of arsenic sulfide slag, and in particular to a constant pressure reaction device for arsenic sulfide slag that prevents liquid backflow. Background Technology

[0002] Arsenic sulfide slag is an industrial waste containing arsenic and sulfur, which is usually generated during non-ferrous metal smelting, chemical production and mining. Arsenic sulfide slag contains high concentrations of arsenic and sulfur, as well as other metallic elements such as copper, lead and zinc, which makes it necessary to treat arsenic sulfide slag with special treatment to reduce the amount of hazardous waste.

[0003] In the existing technology, the treatment of arsenic sulfide slag generally adopts the technical solution of acidic pressure followed by oxidation leaching. In the process, the reactants generally need to undergo chemical reaction in a constant pressure reaction device, which is used to ensure the stability of reaction conditions during the reaction.

[0004] Existing technologies for constant pressure reactors for arsenic sulfide slag typically use pressure sensors to monitor the pressure inside the reactor and then control the pressure inside the reactor to remain constant by adjusting the intake or exhaust volume. However, during operation, pressure imbalances, temperature changes, or changes in gas solubility in the intake system can all lead to the risk of internal liquid backflow during the reaction process. Utility Model Content

[0005] To address the risk of internal liquid backflow in reactors during the reaction process, as described in the background art, this invention proposes a constant-pressure reactor for arsenic sulfide slag to prevent liquid backflow.

[0006] The technical solution of this utility model is: it includes a reaction tank, a buffer tank, and a lifting mechanism;

[0007] The reaction vessel is equipped with a vertically extending stirring rack, and the reaction vessel is equipped with a stirring drive device to drive the stirring rack to rotate.

[0008] The buffer tank is located above the reaction tank. The lower outlet of the buffer tank is connected to the inlet of the reaction tank through a flexible hose. The buffer tank is equipped with an inlet for connecting to external feeding equipment.

[0009] The lifting mechanism is located on the upper surface of the reaction vessel. The lifting mechanism can extend and retract in the vertical direction, and the upper end of the lifting mechanism is fixedly connected to the buffer tank.

[0010] The reaction vessel is equipped with an inlet pipe and an outlet pipe, both of which are equipped with pressure sensors and air valves. The reaction vessel is also equipped with a temperature control system to control the internal temperature.

[0011] The air inlet pipe is used to connect to the gas storage tank, which is equipped with a gas supply device for inputting the gas in the gas storage tank into the reaction vessel. The exhaust pipe is used to connect to the waste gas recovery device.

[0012] The reaction vessel is equipped with a controller, and all pressure sensors and gas valves are connected to the controller.

[0013] Preferably, the lifting mechanism includes a first telescopic rod and a second telescopic rod, both of which can extend and retract in the vertical direction, and the upper ends of both the first telescopic rod and the second telescopic rod are fixedly connected to the buffer tank;

[0014] The second telescopic rod includes a rotating shaft and a connecting cylinder. The rotating shaft is located on the upper surface of the buffer tank and extends vertically. A lead screw is fixedly connected to the upper end of the rotating shaft. The connecting cylinder has a bottom-opening structure and a threaded structure that matches the lead screw inside. The connecting cylinder is threaded onto the lead screw, and the upper end of the connecting cylinder is fixedly connected to the buffer tank.

[0015] The reaction vessel is equipped with a drive mechanism that drives the lead screw to rotate.

[0016] Preferably, the driving mechanism includes a worm gear, a worm, and a lifting drive device. The worm gear is fixedly sleeved on the rotating shaft, the lifting drive device is disposed in the reaction tank, and the output end of the lifting drive device is fixedly connected to the worm, which meshes with the worm gear.

[0017] Preferably, the first telescopic rod includes a sliding cylinder and a sliding rod. The sliding cylinder is fixedly connected to the upper surface of the reaction vessel, and the sliding rod is slidably provided inside the sliding cylinder. The upper end of the sliding rod is located outside the sliding cylinder and is fixedly connected to the buffer tank.

[0018] Preferably, the buffer tank is provided with a filter plate adapted to the internal shape of the buffer tank, and the filter plate is used to filter the material inside the buffer tank.

[0019] Preferably, the reaction vessel is equipped with a liquid level sensor that is connected to the controller.

[0020] Preferably, the bottom of the reaction vessel is provided with a support.

[0021] The advantages of this invention are: it can prevent liquid backflow through the buffer tank, and the height of the buffer tank can be quickly adjusted through the lifting mechanism, which facilitates maintenance and can adapt to complex working environments according to working conditions and workspace size. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the main structure of Example 1;

[0024] Figure 2 for Figure 1 A schematic diagram of a partial sectional view of the structure on the right side;

[0025] Figure 3 for Figure 2 Internal structure diagram;

[0026] Figure 4 for Figure 1 A magnified structural diagram at point A.

[0027] In the diagram, 1 is the reaction vessel, 2 is the stirring rack, 3 is the buffer tank, 301 is the filter plate, 4 is the lifting mechanism, 401 is the slide cylinder, 402 is the slide rod, 403 is the rotating shaft, 404 is the lead screw, 405 is the connecting cylinder, 406 is the worm gear, 407 is the worm, 408 is the lifting drive device, 5 is the air inlet pipe, 6 is the exhaust pipe, 7 is the discharge pipe, 8 is the flexible hose, 9 is the bracket, and 10 is the liquid level sensor. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1: This example aims to propose a constant pressure reaction device for arsenic sulfide slag to prevent liquid backflow.

[0030] according to Figures 1 to 4 It includes a reaction tank 1, a buffer tank 3, and a lifting mechanism 4.

[0031] The reaction vessel 1 is equipped with a vertically extending stirring rack 2. The reaction vessel 1 is equipped with a stirring drive device that drives the stirring rack 2 to rotate. In this embodiment, the stirring drive device can be a motor, and the output shaft of the motor is fixedly connected to the stirring rack 2.

[0032] The reaction vessel 1 is equipped with an air inlet pipe 5 and an exhaust pipe 6. Both the air inlet pipe 5 and the exhaust pipe 6 are equipped with pressure sensors and air valves. The reaction vessel 1 is equipped with a temperature control system to control the internal temperature. The temperature control system for controlling the internal temperature of the reaction vessel 1 and the setting method of the temperature control equipment are existing technologies and will not be described in detail in this embodiment.

[0033] The reaction vessel 1 is equipped with a feed inlet for the arsenic sulfide slag to enter.

[0034] The inlet end of the inlet pipe 5 is connected to the gas storage tank, which stores reducing gas, oxidizing gas and protective gas for the reaction. The gas storage tank is equipped with a gas supply device for inputting the gas in the gas storage tank into the reaction tank 1. The gas supply device can be a gas pump. The exhaust pipe 6 is used to connect to the waste gas recovery device.

[0035] The reaction tank 1 is equipped with a controller, and all pressure sensors and gas valves are connected to the controller. The reaction tank 1 is also equipped with a liquid level sensor 10 that is connected to the controller.

[0036] The bottom of the reaction vessel is equipped with a support 9.

[0037] The buffer tank 3 is located above the reaction tank 1. The lower end of the buffer tank 3 is connected to the inlet of the reaction tank 1 through a flexible hose 8. In this embodiment, the flexible hose 8 can be a corrugated pipe with a multi-layer corrugated structure. The buffer tank 3 is provided with an inlet for connecting to an external feeding device.

[0038] The buffer tank 3 is equipped with a filter plate 301 that is adapted to the internal shape of the buffer tank 3, and performs preliminary filtration when the feeding mechanism feeds the material into the buffer tank 3.

[0039] The lifting mechanism 4 is located on the upper surface of the reaction vessel 1. The lifting mechanism 4 can extend and retract in the vertical direction. The lifting mechanism 4 includes a first telescopic rod and a second telescopic rod. Both the first telescopic rod and the second telescopic rod can extend and retract in the vertical direction. The upper ends of the first telescopic rod and the second telescopic rod are fixedly connected to the buffer tank 3.

[0040] The first telescopic rod includes a sliding cylinder 401 and a sliding rod 402. The sliding cylinder 401 is fixedly connected to the upper surface of the reaction vessel 1. The sliding rod 402 is slidably provided inside the sliding cylinder 401. The upper end of the sliding rod 402 is located outside the sliding cylinder 401. The upper end of the sliding rod 402 is fixedly connected to the buffer tank 3.

[0041] The second telescopic rod includes a rotating shaft 403 and a connecting cylinder 405. The rotating shaft 403 is located on the upper surface of the buffer tank 3 and extends vertically. A lead screw 404 is fixedly connected to the upper end of the rotating shaft 403. The connecting cylinder 405 has a bottom-opening structure and a threaded structure that matches the lead screw 404 inside. The connecting cylinder 405 is threaded onto the lead screw 404. The upper end of the connecting cylinder 405 is fixedly connected to the buffer tank 3. A drive mechanism for driving the lead screw 404 to rotate is provided on the reaction tank 1. The drive mechanism is connected to the controller.

[0042] The drive mechanism includes a worm gear 406, a worm 407, and a lifting drive device 408. The worm gear 406 is fixedly sleeved on the rotating shaft 403. The lifting drive device 408 is disposed in the reaction tank 1. In this embodiment, the lifting drive device 408 can be a motor. The output end of the lifting drive device 408 is fixedly connected to the worm 407, and the worm 407 is meshed with the worm gear 406.

[0043] Working principle: The acid solution is fed into the buffer tank 3 through the feeding equipment. The acid solution flows from the buffer tank 3 into the reaction tank 1. Then, the gas inlet pipe 5 and the exhaust pipe 6 are used to control the gas inlet and outlet, thereby controlling the pressure inside the reaction tank 1. The gas valve can control the gas inlet and outlet volume. Then, the temperature inside the reaction tank 1 is controlled by the temperature control system. The oxidant and reducing agent are introduced through the gas inlet pipe 5, so that the arsenic sulfide slag undergoes an oxidation reaction after acidification.

[0044] During the reaction, gas is produced and the internal temperature changes. The acid may flow back. The backflowing liquid flows into the buffer tank 3. After pressure control, it flows back from the buffer tank to the reaction tank 1, thus preventing the liquid from flowing back into the feeding equipment.

[0045] The drive mechanism drives the lead screw 404 to rotate. The rotation of the lead screw 404 causes the connecting cylinder 405 to move up and down under the limiting action of the slide rod 402. The up and down movement of the connecting cylinder 405 causes the buffer tank 3 to move up and down.

[0046] When the buffer tank 3 is taller, the flexible hose 8 can be extended, thus accommodating more gas and liquid. At the same time, the liquid level rises, reducing the risk of liquid backflow. Conversely, when the buffer tank 3 is lowered, it reduces the floor space required, saving space. The lower height also reduces maintenance difficulty, facilitates repairs, and reduces the residence time of gas in the tank, which is beneficial for rapid response to pressure changes.

[0047] Therefore, the buffer tank 3 can be used to buffer the reaction. When the liquid backflows, it flows into the buffer tank 3 to prevent the liquid from flowing back into the feeding equipment. At the same time, the height of the buffer tank 3 can be quickly adjusted according to different working conditions to adapt to more complex working environments.

[0048] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A constant-pressure reaction apparatus for arsenic sulfide slag to prevent liquid backflow, characterized in that: It includes a reaction vessel (1), a buffer tank (3), and a lifting mechanism (4); The reaction vessel (1) is equipped with a vertically extending stirring rack (2), and the reaction vessel (1) is equipped with a stirring drive device to drive the stirring rack (2) to rotate. The buffer tank (3) is located above the reaction tank (1). The lower end of the buffer tank (3) is connected to the inlet of the reaction tank (1) through a flexible hose (8). The buffer tank (3) is provided with an inlet for connecting to external feeding equipment. The lifting mechanism (4) is located on the upper surface of the reaction tank (1). The lifting mechanism (4) can extend and retract in the vertical direction. The upper end of the lifting mechanism (4) is fixedly connected to the buffer tank (3). The reaction vessel (1) is equipped with an air inlet pipe (5) and an exhaust pipe (6). Both the air inlet pipe (5) and the exhaust pipe (6) are equipped with pressure sensors and air valves. The reaction vessel (1) is equipped with a temperature control system to control the internal temperature. The inlet pipe (5) is used to connect to the gas storage tank. The gas storage tank is equipped with a gas supply device for inputting the gas in the gas storage tank into the reaction tank (1). The exhaust pipe (6) is used to connect to the waste gas recovery device. The reaction vessel (1) is equipped with a controller, and the pressure sensors are all connected to the controller. The gas valves are all connected to the controller.

2. The constant-pressure reaction device for preventing liquid backflow of arsenic sulfide slag according to claim 1, characterized in that: The lifting mechanism (4) includes a first telescopic rod and a second telescopic rod. Both the first telescopic rod and the second telescopic rod can extend and retract in the vertical direction. The upper ends of both the first telescopic rod and the second telescopic rod are fixedly connected to the buffer tank (3). The second telescopic rod includes a rotating shaft (403) and a connecting cylinder (405). The rotating shaft (403) is located on the upper surface of the buffer tank (3). The rotating shaft (403) extends vertically. The upper end of the rotating shaft (403) is fixedly connected to a lead screw (404). The connecting cylinder (405) has a bottom opening structure. The connecting cylinder (405) is provided with a thread structure that is compatible with the lead screw (404). The connecting cylinder (405) is threaded onto the lead screw (404). The upper end of the connecting cylinder (405) is fixedly connected to the buffer tank (3). The reaction vessel (1) is equipped with a drive mechanism that drives the lead screw (404) to rotate.

3. The constant-pressure reaction device for preventing liquid backflow of arsenic sulfide slag according to claim 2, characterized in that: The driving mechanism includes a worm gear (406), a worm (407), and a lifting drive device (408). The worm gear (406) is fixedly sleeved on the rotating shaft (403), and the lifting drive device (408) is set in the reaction tank (1). The output end of the lifting drive device (408) is fixedly connected to the worm (407), and the worm (407) meshes with the worm gear (406).

4. The constant-pressure reaction device for preventing liquid backflow of arsenic sulfide slag according to claim 3, characterized in that: The first telescopic rod includes a sliding cylinder (401) and a sliding rod (402). The sliding cylinder (401) is fixedly connected to the upper surface of the reaction vessel (1). The sliding rod (402) is slidably provided inside the sliding cylinder (401). The upper end of the sliding rod (402) is located outside the sliding cylinder (401). The upper end of the sliding rod (402) is fixedly connected to the buffer tank (3).

5. A constant-pressure reaction apparatus for preventing liquid backflow of arsenic sulfide slag according to any one of claims 1-4, characterized in that: The buffer tank (3) is provided with a filter plate (301) adapted to the internal shape of the buffer tank (3), and the filter plate (301) is used to filter the material inside the buffer tank (3).

6. A constant-pressure reaction apparatus for preventing liquid backflow of arsenic sulfide slag according to any one of claims 1-4, characterized in that: The reaction vessel (1) is equipped with a liquid level sensor (10) that is connected to the controller.

7. A constant-pressure reaction apparatus for preventing liquid backflow of arsenic sulfide slag according to any one of claims 1-4, characterized in that: The bottom of the reaction vessel is provided with a support (9).

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