A continuous production device for xanthate

Abstract

A kind of xanthate continuous production device, it belongs to xanthate production equipment technical field, it includes emulsification device, reaction device and drying equipment, wherein the outlet end of emulsification device is equipped with feed line, it is communicated with reaction device by feed line, the outlet end of reaction device is equipped with discharge line, it is communicated with drying equipment by discharge line, the feed line is equipped with air inlet line parallel with it, the end of air inlet line is equipped with the air supply device of communication, the import and export of above components are all equipped with corresponding valve, emulsification device and reaction device are all equipped with corresponding temperature control device and temperature sensing device.The utility model realizes the continuous production of xanthate, improves the production efficiency of xanthate, and reaction process is safer and more reliable.

Description

Technical Field

[0001] This utility model belongs to the technical field of xanthate production equipment, and particularly relates to a device for continuous production of xanthate. Background Technology

[0002] Xanthates are collectors with strong collecting power but weak selectivity, widely used in the flotation of copper, zinc, nickel, and gold-bearing ferrite ores. They have a significant advantage in improving gold recovery rates in gold and copper-gold ores, and can also achieve satisfactory results in the flotation of difficult-to-process copper-lead oxide ores. Currently, the main methods for producing xanthates are the kneading method and the solvent method. The kneading method involves directly adding alcohol and carbon disulfide into a kneader, and then gradually adding alkali to react for a period of time to produce xanthates. The solvent method involves reacting alcohol, carbon disulfide, and alkali in an organic medium, and after the reaction is complete, filtering, drying, or vacuum distillation are performed to obtain the xanthate product. Both of the above methods in the existing technology have certain drawbacks. Specifically, the kneading method requires a powdered alkali system to crush caustic soda flakes or granules. The three react in a kneader for a period of time, and after the reaction is complete and dried, the product is ready. Because powdered alkali is highly hygroscopic and corrosive, blockage is very likely to occur during the reaction, resulting in high impurities in the produced xanthate and a low yield. At the same time, it places high demands on the alkali addition equipment, and because the alkali is highly hygroscopic, it cannot be crushed in advance and must be added immediately after powdering before use. In actual operation, the alkali needs to be powdered in batches. The solvent method has a long product synthesis time. In the existing technology, neither the kneading method nor the solvent method can achieve continuous production of xanthates. The reaction time is long, which is not conducive to the large-scale industrial production of xanthates. Utility Model Content

[0003] The purpose of this invention is to provide an apparatus for the continuous production of xanthate, so as to solve the technical problems of existing xanthate production being unable to be carried out continuously, with long reaction time and low production efficiency.

[0004] To achieve the above objectives, the specific technical solution of this utility model is as follows: A continuous xanthate production apparatus includes an emulsifying unit, a reaction unit, and a drying device. The emulsifying unit has a feed pipe at its outlet end, which is connected to the reaction unit. The reaction unit has a discharge pipe at its outlet end, which is connected to the drying device. The feed pipe has a parallel air inlet pipe, and the end of the air inlet pipe has a connected air supply device. Each component has a corresponding valve at its inlet and outlet. The emulsifying unit and the reaction unit are equipped with corresponding temperature control devices and temperature sensors.

[0005] Furthermore, the emulsification device includes an alcohol metering tank with a level gauge, an alcohol-alkali mixing tank with a stirring device, an alkali silo, and a multi-stage emulsification pump. The alcohol metering tank has an external alcohol supply pipeline at its inlet and an alcohol delivery pipeline at its outlet. The alcohol metering tank is connected to the alcohol-alkali mixing tank through the alcohol delivery pipeline. The stirring device of the alcohol-alkali mixing tank is located in its inner cavity. A mixing motor with its shaft end passing through its top wall and connected to the stirring device is located above the alcohol-alkali mixing tank. The alkali silo has an external alkali supply pipeline at its inlet and an alkali delivery pipeline at its outlet. The alkali silo is connected to the alcohol-alkali mixing tank through the alkali delivery pipeline. The outlet end of the alcohol-alkali mixing tank is equipped with a material delivery pipeline, which is connected to the multi-stage emulsification pump. The emulsification device is connected to the feed pipeline through the outlet of the multi-stage emulsification pump.

[0006] Furthermore, multiple parallel alcohol-alkali mixing tanks are provided between the alcohol metering tank and the multi-stage emulsifying pump. Each alcohol-alkali mixing tank is equipped with a corresponding independent alkali silo. Each alcohol-alkali mixing tank has a corresponding independent alcohol delivery pipeline at its inlet. The inlets of the multiple independent alcohol delivery pipelines are connected in parallel to the outlet of the alcohol metering tank. Each alcohol-alkali mixing tank has a corresponding independent material delivery pipeline at its outlet. The outlets of the multiple independent material delivery pipelines are connected in parallel to the inlet of the multi-stage emulsifying pump.

[0007] Furthermore, the alcohol-alkali mixing tank is provided with a first air inlet and an exhaust gas outlet at the top, and an exhaust gas treatment pipeline is provided at the exhaust gas outlet. The alcohol-alkali mixing tank is connected to an external exhaust gas treatment device through the exhaust gas treatment pipeline. A third air inlet is provided above the alkali silo. A nitrogen inlet pipeline is provided in parallel on the alkali conveying pipeline. The first air inlet, the third air inlet, and the nitrogen inlet pipeline are all connected to a nitrogen supply pipeline. The valves include a first check valve provided at the first air inlet, a first control valve provided at the outlet of the alkali silo, and a first double control valve provided on the alcohol conveying pipeline. The temperature control device includes a first jacket fitted around the outer ring of the alcohol-alkali mixing tank and a pipe jacket fitted on the upper part of the feed pipeline. The first jacket is connected to a first temperature control pipeline, and the pipe jacket is connected to a fourth temperature control pipeline. A flow meter is provided at the outlet of the multi-stage emulsifying pump.

[0008] Furthermore, the gas supply device includes a gas storage tank and a precision metering pump. The inlet end of the gas inlet pipe is connected to the outlet of the gas storage tank, and the outlet end of the gas inlet pipe is connected in parallel to the feed pipe. The precision metering pump is located on the gas inlet pipe between the gas storage tank and the feed pipe.

[0009] Furthermore, a second dual-control valve is provided in the air inlet pipeline between the gas storage tank and the precision metering pump.

[0010] Furthermore, the reaction device includes a static reactor and a slurry tank with a stirring assembly. The inlet of the static reactor is connected to the feed pipeline, and the outlet of the slurry tank is connected to the discharge pipeline. An intermediate pipeline is provided between the static reactor and the slurry tank, and the two are connected through the intermediate pipeline. The stirring assembly of the slurry tank is located in its inner cavity, and a power motor with its shaft end passing through its top wall and connected to the stirring assembly is provided above it.

[0011] Furthermore, the slurry tank is provided with a second air inlet connected to an external nitrogen supply pipeline at its top, and a sampling port connected in parallel with the discharge pipeline is provided at the bottom outlet of the slurry tank. The valves include a second check valve provided at the second air inlet and a third dual-control valve provided at the outlet of the slurry tank. The outer ring of the slurry tank is fitted with a second jacket, and the second jacket is externally connected to a second temperature control pipeline. The outer ring of the static reactor is fitted with a third jacket, and the third jacket is externally connected to a third temperature control pipeline.

[0012] Furthermore, the temperature sensing device includes a first thermometer located at the inlet of the static reactor and a second thermometer located at the bottom of the slurry tank.

[0013] Furthermore, the drying equipment includes a drying device and a screw pump, wherein the drying device is located at the outlet end of the discharge pipeline, and the screw pump is located on the discharge pipeline between the drying device and the slurry tank.

[0014] This utility model of a continuous xanthate production device enables uninterrupted and continuous production of xanthate, greatly saving the synthesis time of xanthate, improving production efficiency, and achieving a higher product conversion rate. The reaction process is continuous in batches, greatly increasing the output per unit time. Its process is closed and environmentally friendly, and the reaction process is safer and more reliable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structural process of this utility model; Explanation of markings in the diagram: 1. Emulsification unit; 11. Alcohol metering tank; 12. Alcohol-alkali mixing tank; 13. Alkali silo; 14. Multistage emulsification pump; 15. Level gauge; 2. Reaction unit; 21. Static reactor; 22. Slurry tank; 3. Drying equipment; 31. Drying device; 32. Screw pump; 4. Feed pipeline; 41. Discharge pipeline; 42. Air inlet pipeline; 43. Alcohol conveying pipeline; 44. Alkali conveying pipeline; 45. Feed pipeline; 46. Intermediate pipeline; 47. Tail gas treatment pipeline; 5. Gas supply. The apparatus includes: 51. Gas storage tank; 52. Precision metering pump; 6. First air inlet; 61. Second air inlet; 62. Third air inlet; 63. Nitrogen inlet pipeline; 64. Sampling port; 7. First check valve; 71. Second check valve; 72. First control valve; 73. First dual-control valve; 74. Second dual-control valve; 75. Third dual-control valve; 8. First jacket; 81. Second jacket; 82. Third jacket; 83. Pipeline jacket; 9. Flow meter; 91. First thermometer; 92. Second thermometer. Detailed Implementation

[0016] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a continuous xanthate production apparatus according to this utility model.

[0017] like Figure 1 As shown, the continuous xanthate production apparatus of this utility model includes an emulsifying device 1, a reaction device 2, and a drying device 3. The outlet end of the emulsifying device 1 is provided with a feed pipe 4, which is connected to the inlet of the reaction device 2. The outlet end of the reaction device 2 is provided with a discharge pipe 41, which is connected to the drying device 3. The feed pipe 4 is provided with a parallel air inlet pipe 42, and the end of the air inlet pipe 42 is provided with a connected air supply device 5. During operation, the emulsifying device 1 provides the reaction device 2 with an emulsified alcohol-alkali solution through the feed pipe 4, and the air supply device 5 supplies carbon disulfide to the reaction device 2 through the air inlet pipe 42. The emulsified alcohol-alkali solution and carbon disulfide are mixed and reacted in the reaction device 2. The reaction liquid is transported to the drying device 3 through the discharge pipe 41, and then dried in the drying device 3 to form xanthate product.

[0018] Emulsification unit 1 includes an alcohol metering tank 11 with a level gauge 15, an alcohol-alkali mixing tank 12 with a stirring device, an alkali silo 13, and a multi-stage emulsification pump 14. The level gauge 15 of the alcohol metering tank 11 is located on its side wall, providing real-time display and monitoring of the liquid level. The upper end of the alcohol metering tank 11 has an inlet, through which an alcohol supply pipeline is connected. During production, the alcohol supply pipeline inputs a fixed amount of alcohol into the alcohol metering tank 11 through its inlet. The lower end of the measuring tank 11 has an outlet, at which an alcohol conveying pipeline 43 is connected to the alcohol-alkali mixing tank 12. The upper part of the alkali silo 13 has an inlet, through which an external alkali supply pipeline is connected. The lower end of the silo has an outlet, at which an alkali conveying pipeline 44 is connected to the alcohol-alkali mixing tank 12. The stirring device of the alcohol-alkali mixing tank 12 is located in its inner cavity, and a mixing motor is located above it. The shaft end of the mixing motor passes through... The top wall of the alcohol-alkali mixing tank 12 is connected to the stirring device inside its cavity. A conveying pipeline 45 is provided at the outlet end of the alcohol-alkali mixing tank 12, which is connected to a multi-stage emulsifying pump 14. The inlet end of the feeding pipeline 4 is connected to the outlet of the multi-stage emulsifying pump 14. During operation, the alcohol metering tank 11 and the alkali silo 13 respectively supply alcohol and caustic soda flakes to the alcohol-alkali mixing tank 12 through the alcohol conveying pipeline 43 and the alkali conveying pipeline 44. The stirring device rotates under the action of the mixing motor. The alcohol and caustic soda in the alcohol-alkali mixing tank 12 are stirred to form a uniformly mixed alcohol-alkali solution. The mixed alcohol-alkali solution is then transported to the multi-stage emulsifying pump 14 through the conveying pipeline 45. Under the action of the multi-stage emulsifying pump 14, it is emulsified to form an emulsified alcohol-alkali solution, which is then transported to the reaction device 2 through the feed pipeline 4 by the multi-stage emulsifying pump 14. The amount of emulsified alcohol-alkali solution transported is precisely controlled by adjusting the speed of the multi-stage emulsifying pump 14.

[0019] Furthermore, the alcohol-alkali mixing tank 12 is connected between the alcohol metering tank 11 and the multi-stage emulsifying pump 14 via corresponding pipelines. To improve the efficiency and continuity of alcohol and caustic soda mixing, multiple parallel alcohol-alkali mixing tanks 12 can be connected between the alcohol metering tank 11 and the multi-stage emulsifying pump 14 via corresponding pipelines. Each alcohol-alkali mixing tank 12 is equipped with a corresponding independent alkali silo 13. In this embodiment, a pair of parallel alcohol-alkali mixing tanks 12 are provided between the alcohol metering tank 11 and the multi-stage emulsifying pump 14. Each alcohol-alkali mixing tank 12 is equipped with a corresponding alkali conveying pipeline 44. The two alcohol-alkali mixing tanks 12 are respectively connected to their respective alkali silos 13 via corresponding alkali conveying pipelines 44. Each alcohol-alkali mixing tank 12 has a corresponding independent alcohol conveying pipeline 43 at its inlet. The inlet ends of the two alcohol conveying pipelines 43 are connected in parallel to each other and connected to the outlet of the alcohol metering tank 11. Each alcohol-alkali mixing tank 12 has a corresponding independent conveying pipeline 45 at its outlet. The outlets of 45 are connected in parallel and connected to the inlet of the multi-stage emulsifying pump 14. Each alcohol-alkali mixing tank 12 is equipped with an external tail gas treatment device. A tail gas treatment pipeline 47 is provided at the tail gas outlet. The alcohol-alkali mixing tank 12 is connected to the external tail gas treatment device through the tail gas treatment pipeline 47. In this embodiment, the two alcohol-alkali mixing tanks 12 are connected to the external tail gas treatment device through the parallel tail gas treatment pipeline 47. The waste gas generated during the production process is discharged to the external tail gas treatment device for treatment through the tail gas outlet and the tail gas treatment pipeline. During production, a certain amount of alcohol and alkali can be individually input into each alcohol-alkali mixing tank 12 through the corresponding pipeline, so that alcohol-alkali mixture is formed in multiple alcohol-alkali mixing tanks 12 in sequence. Then, it is input into the multi-stage emulsifying pump 14 in sequence through the conveying pipeline 45 for emulsification. The setting of multiple alcohol-alkali mixing tanks 12 can effectively improve the mixing efficiency of alcohol and caustic soda flakes, and can better ensure the continuity of the emulsification reaction in the multi-stage emulsifying pump 14.

[0020] Furthermore, a flow meter 9 is installed at the outlet of the multi-stage emulsifying pump 14. The flow meter 9 can display the flow rate of the emulsified sodium alkoxide mixture output by the multi-stage emulsifying pump 14, thereby assisting the operator in more accurately controlling the flow rate of the emulsified sodium alkoxide mixture output by the multi-stage emulsifying pump 14. This prevents the excessive flow rate of the emulsified sodium alkoxide mixture from being discharged at one time, which could cause the material to clog the feed pipe 4 or the subsequent reaction to be insufficient, thus affecting the continuous production of xanthate products.

[0021] The gas supply device 5 includes a gas storage tank 51 and a precision metering pump 52. The inlet end of the gas inlet pipe 42 is connected to the outlet end of the gas storage tank 51, and the outlet end of the gas inlet pipe 42 is connected in parallel to the feed pipe 4. The precision metering pump 52 is located on the gas inlet pipe 42 between the gas storage tank 51 and the feed pipe 4. In this embodiment, a plunger pump is used as the precision metering pump 52. During operation, carbon disulfide stored in the gas storage tank 51 is input into the feed pipe 4 under the action of the precision metering pump 52. During this process, the precision metering pump 52 precisely controls the flow rate of carbon disulfide to ensure the proportion of carbon disulfide added to the alcohol-alkali solution and the continuity of the subsequent mixing reaction of carbon disulfide and alcohol-alkali solution.

[0022] The reaction apparatus 2 includes a static reactor 21 and a slurry tank 22 with a stirring assembly. The reaction apparatus 2 is connected to a feed pipe 4 via the static reactor 21 and to a discharge pipe 41 via the slurry tank 22. The outlet end of the feed pipe 4 is connected to the inlet of the static reactor 21, and the inlet end of the discharge pipe 41 is connected to the outlet of the slurry tank 22. A corresponding intermediate pipe 46 is provided between the static reactor 21 and the slurry tank 22. The inlet end of the intermediate pipe 46 is connected to the outlet of the static reactor 21, and the outlet end is connected to the inlet of the slurry tank 22. The stirring assembly of the slurry tank 22 is located inside its cavity, and a power motor is installed above it. The shaft end of the power motor passes through the top wall of the slurry tank 22 and... The stirring components inside the chamber are connected. During operation, the emulsified alcohol-alkali solution in the emulsification device 1 and the carbon disulfide in the gas supply device 5 are fed into the feed pipe 4 in a corresponding ratio. The two are precisely and quantitatively mixed in the feed pipe 4 and continuously fed into the static reactor 21. The emulsified alcohol-alkali solution and carbon disulfide are well dispersed and fully mixed in the static reactor 21. During this process, the two react. The slurry after the reaction is collected into the slurry tank 22 through the intermediate pipe 46. The stirring components in the slurry tank 22 rotate under the action of the power motor, thereby stirring the slurry in the slurry tank 22. The setting of the slurry tank 22 further ensures the continuity and sustainability of the mixing reaction of the alcohol-alkali solution and carbon disulfide.

[0023] The drying equipment 3 includes a drying device 31 and a screw pump 32. The drying device 31 is located at the outlet end of the discharge pipe 41. There are various existing optional drying devices 31, such as spray dryers or vacuum belt dryers. In this embodiment, a spray dryer is selected as the drying equipment 3. The screw pump 32 is located on the discharge pipe 41 between the drying equipment 3 and the slurry tank 22. The slurry that has been completely reacted in the slurry tank 22 is transported to the drying device 31 under the action of the screw pump 32. The slurry is dried under the action of the drying device 31, thereby forming the finished xanthate.

[0024] Furthermore, both the emulsification unit 1 and the reaction unit 2 are equipped with corresponding temperature control devices and temperature sensing devices. These devices work together to control the temperature during xanthate production. The temperature control device includes a first jacket 8, a second jacket 81, a pipe jacket 83, and a third jacket 82. The first jacket 8 is fitted around the bottom of the outer ring of the alcohol-alkali mixing tank 12, with its bottom port as the inlet and its top port as the outlet. It is connected to a first temperature control pipeline via the inlet and outlet. The heat exchange liquid in the first temperature control pipeline enters the first jacket 8 through its inlet, thereby exchanging heat with the alcohol-alkali mixing tank 12 and coordinating the temperature control of the tank. The liquid then flows out through its outlet. In this embodiment, both parallel alcohol-alkali mixing tanks 12 are equipped with independent first jackets 8. At the same time, the two first jackets 8 control the temperature of the two alcohol-alkali mixing tanks 12, thereby achieving independent temperature control of each alcohol-alkali mixing tank 12. The second jacket 81 is fitted at the bottom of the outer ring of the slurry tank 22. The second jacket 81 is the same as the first jacket 8, with the bottom port as the inlet and the top port as the outlet. It is connected to the second temperature control pipeline through the inlet and the outlet. The heat exchange liquid in the second temperature control pipeline enters the second jacket 81 through its inlet, thereby exchanging heat with the slurry tank 22 and then flowing out through its outlet, thereby achieving temperature control of the slurry tank 22. The third jacket 82 is fitted at the outer ring of the static reactor 21, with an inlet and an outlet at its two ends. It is connected to the third temperature control pipeline through its inlet and the outlet. The heat exchange liquid in the third temperature control pipeline enters the third jacket 82 through its inlet, thereby achieving temperature control of the slurry tank 22. After heat exchange with the static reactor 21, the liquid flows out through its outlet, thereby achieving temperature control of the static reactor 21. A pipe jacket 83 is fitted onto the feed pipe 4 between the multi-stage emulsion pump and the static reactor 21. In this embodiment, the pipe between the multi-stage emulsion pump and the static reactor 21 is a double-layered pipe, concentric inside and out and not interconnected. The inner ring of the pipe serves as the feed pipe 4 connecting the multi-stage emulsion pump and the static reactor 21, while the outer ring is the pipe jacket 83 of the feed pipe 4. The pipe jacket 83 has an inlet and an outlet at both ends, communicating with its inner cavity. It is connected to a fourth temperature control pipe through the inlet and outlet. The heat exchange liquid in the fourth temperature control pipe enters the pipe jacket 83 through its inlet, thus exchanging heat with the feed pipe 4 and flowing out through its outlet. This enables temperature control of the feed pipe. The first, second, third, and fourth temperature-controlled pipelines are each equipped with a corresponding heat exchange device. In this embodiment, all four use a combined heating and cooling unit as the heat exchange device. Taking the fourth temperature-controlled pipeline on the pipe jacket 83 as an example, the combined heating and cooling unit forms a closed, circulatory path between the inlet and outlet of the pipe jacket 83 and the fourth temperature-controlled pipeline. During operation, the heat exchange fluid in the combined heating and cooling unit continuously flows into the pipe jacket 83 through the corresponding pipeline, exchanges heat with the feed pipe 4 in the pipe jacket 83, and then flows out, returning to the combined heating and cooling unit. Under the action of the combined heating and cooling unit, it balances back to its original temperature, and is then transported back to the pipe jacket 83 for heat exchange with the feed pipe 4. This cycle repeats continuously.This allows for precise control of the material temperature in feed pipe 4.

[0025] The temperature sensing device includes a first thermometer 91 and a second thermometer 92. The first thermometer 91 is located at the inlet of the static reactor 21, which is connected to the feed pipe 4. It works in conjunction with the pipe jacket 83 to realize real-time monitoring and control of the temperature of the material input into the static reactor 21. The second thermometer 92 is located at the bottom of the slurry tank 22. It works in conjunction with the second jacket 81 to realize real-time monitoring and control of the temperature of the slurry in the slurry tank 22.

[0026] Furthermore, a sampling port 64 is provided at the bottom outlet of the slurry tank 22, which is connected in parallel with the discharge pipeline 41. The staff can take real-time samples of the slurry in the slurry tank 22 through the sampling port 64, which makes it more convenient for the staff to control the production quality of xanthate.

[0027] Furthermore, the production unit is equipped with multiple nitrogen inlets, including a first inlet 6 above the alcohol-alkali mixing tank 12, a second inlet 61 above the slurry tank 22, a third inlet 62 above the alkali silo 13, and a nitrogen inlet pipe 63 connected in parallel to the conveying pipeline 45. All four are externally connected to nitrogen supply pipelines. Before each operation of the production unit, the nitrogen supply pipelines fill the production unit with nitrogen through the first inlet 6, the second inlet 61, the third inlet 62, and the nitrogen inlet pipe 63, so that nitrogen fills all components of the production unit, replacing the air in the production unit and creating an inert gas environment for the production of xanthate, preventing air from affecting the production of xanthate.

[0028] Furthermore, each component of the production unit is equipped with corresponding valves at its inlet and outlet. Specifically, this includes a first check valve 7 at the first air inlet 6 on the alcohol-alkali mixing tank 12, preventing the alcohol-alkali mixture in the tank from flowing back out through the first air inlet 6; a second check valve 71 at the second air inlet 61 on the slurry tank 22, preventing the slurry in the tank 22 from flowing back out through the second air inlet 61; and a first control valve 72 at the bottom outlet of the alkali silo 13. In this embodiment, the alkali delivery pipeline 44 is made of corrosion-resistant flexible tubing, and the first control valve 72 is mounted on the tubing, using a butterfly valve as the first control valve 72. This facilitates the control of the alkali flow rate in the alkali delivery pipeline 44 by the operator. Since alkali is a corrosive substance, it is important to prevent it from flowing too quickly into the alcohol-alkali mixing tank 12, which could cause excessive impact on the tank. This also applies to the alcohol metering tank 11 and the alcohol... A first dual-control valve 73 is provided on the alcohol transfer pipeline 43 between the alkali mixing tanks 12. In this embodiment, a manual ball valve and a pneumatic ball valve connected in series are used as the first dual-control valve 73. The two parallel alcohol transfer pipelines 43 are each provided with a corresponding first dual-control valve 73. A second dual-control valve 74 is provided on the air inlet pipeline 42 between the gas storage tank 51 and the precision metering pump 52. In this embodiment, a manual ball valve and a pneumatic regulating valve connected in series are used as the second dual-control valve 74. A third dual-control valve 75 is provided at the outlet of the slurry tank 22. In this embodiment, a pneumatic butterfly valve and a pneumatic eccentric plug valve are installed in series as the third dual-control valve 75. The slurry tank 22 is connected to the discharge pipeline 41 through the pneumatic eccentric plug valve. The valve cores of the butterfly valve and the eccentric plug valve are both lined with polytetrafluoroethylene, which has higher corrosion resistance and better stability. The setting of multiple valves makes it easier for the staff to control the xanthate production process more precisely.

[0029] In this embodiment, flake base is used to react with alcohol and carbon disulfide to synthesize xanthate. There are many types of alcohol and flake base that can be used in the production of xanthate, such as alcohols including ethanol, isopropanol, n-butanol, isobutanol, n-pentanol and isopentanol, etc., and flake bases including flake potassium hydroxide or sodium hydroxide, etc. In this embodiment, ethanol and flake potassium hydroxide are used as reaction raw materials.

[0030] Under normal conditions, all valves of the production unit are closed. Before production, firstly, all valves connecting the pipelines between the production units are opened. Then, nitrogen is introduced into each component of the production unit through multiple nitrogen inlets, filling the components with nitrogen and fully replacing the air in each component. After this process, all valves are closed, and xanthate production can then begin. During production, only valves that are required for operation are opened, while valves that are not required for operation are closed.

[0031] During production, firstly, raw alcohol is fed into the alcohol metering tank 11 through an external alcohol supply pipeline. The level gauge 15 monitors the amount of alcohol fed into the alcohol metering tank 11 in real time to ensure the quantitative amount of alcohol added to the alcohol metering tank 11. Then, the first dual control valve 73 is opened, allowing the quantitative amount of alcohol in the alcohol metering tank 11 to be added to the alcohol-alkali mixing tank 12 in one go through the alcohol delivery pipeline 43. Next, a quantitative amount of caustic soda flakes is added to the alkali silo 13 through an external alkali supply pipeline. The first control valve 72 is opened, allowing the caustic soda flakes in the alkali silo 13 to be fed into the alcohol-alkali mixing tank 12 through the alkali delivery pipeline 44. At this time, the alcohol and caustic soda flakes mix with each other in the alcohol-alkali mixing tank 12 to form an alcohol-alkali solution. The mixed alcohol-alkali solution is then transported to the multi-stage emulsification pump 14 through the conveying pipeline 45. Under the action of the multi-stage emulsifying pump 14, the alcohol-alkali solution is emulsified and flows into the feed pipe 4. Simultaneously, carbon disulfide is fed into the feed pipe 4 from the gas storage tank 51 by the precision metering pump 52. The emulsified alcohol-alkali solution and carbon disulfide are mixed in the feed pipe 4 and then transported to the static reactor 21. The two react in the static reactor 21 to form xanthate slurry. The reacted slurry is continuously discharged from the static reactor 21 and collected in the slurry tank 22, where it is further agitated. The slurry in the tank 22 is then transported to the drying equipment 3 via the discharge pipe 41 by the screw pump 32. Finally, the finished xanthate is formed under constant-temperature drying in the drying equipment 3. During the production process, the temperature control device and the temperature sensing device work together to strictly control the production temperature of xanthate, resulting in faster reaction and higher yield.

[0032] This utility model of a continuous xanthate production device enables simultaneous feeding and discharging of raw materials and products, as well as continuous discharge from the discharge port. Compared to the traditional method of adding some raw materials at once and controlling the reaction with another raw material, where all raw materials need to react in the reactor for a period of time before discharge, resulting in an intermittent discharge section, this device achieves uninterrupted and continuous production of xanthates by continuously feeding from one end of a static reactor 21 and continuously discharging from the other end. This greatly saves the synthesis time of xanthates, resulting in a higher product conversion rate and a significantly increased yield per unit time, thus improving the production efficiency of xanthates. The process is closed and environmentally friendly, and the reaction process is safer and more reliable.

[0033] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A continuous xanthate production apparatus characterized by, It includes an emulsifying device (1), a reaction device (2), and a drying device (3). The emulsifying device (1) has a feed pipe (4) at its outlet end, which is connected to the reaction device (2) through the feed pipe (4). The reaction device (2) has a discharge pipe (41) at its outlet end, which is connected to the drying device (3) through the discharge pipe (41). The feed pipe (4) has an air inlet pipe (42) connected in parallel with it. The end of the air inlet pipe (42) has a connected air supply device (5). Each of the above components has a corresponding valve at its inlet and outlet. The emulsifying device (1) and the reaction device (2) are equipped with corresponding temperature control devices and temperature sensing devices.

2. The continuous xanthate production apparatus according to claim 1, characterized by, The emulsification device (1) includes an alcohol metering tank (11) with a level gauge (15), an alcohol-alkali mixing tank (12) with a stirring device, an alkali silo (13), and a multi-stage emulsification pump (14). The inlet of the alcohol metering tank (11) is connected to an external alcohol supply pipeline, and its outlet is equipped with an alcohol delivery pipeline (43). The alcohol metering tank (11) is connected to the alcohol-alkali mixing tank (12) via the alcohol delivery pipeline (43). The stirring device of the alcohol-alkali mixing tank (12) is located inside its cavity. The unit is equipped with a mixing motor whose shaft end passes through its top wall and is connected to the stirring device. The inlet of the alkali silo (13) is connected to an external alkali supply pipeline, and its outlet is equipped with an alkali conveying pipeline (44), which is connected to the alcohol-alkali mixing tank (12) through the alkali conveying pipeline (44). The outlet end of the alcohol-alkali mixing tank (12) is equipped with a conveying pipeline (45), which is connected to the multi-stage emulsifying pump (14) through the conveying pipeline (45). The emulsifying device (1) is connected to the feed pipeline (4) through the outlet of the multi-stage emulsifying pump (14).

3. The continuous xanthate production apparatus according to claim 2, characterized by, Multiple parallel alcohol-alkali mixing tanks (12) are provided between the alcohol metering tank (11) and the multi-stage emulsifying pump (14). Each alcohol-alkali mixing tank (12) is provided with a corresponding independent alkali silo (13). Each alcohol-alkali mixing tank (12) is provided with a corresponding independent alcohol conveying pipeline (43) at its inlet. The inlet ends of the multiple independent alcohol conveying pipelines (43) are connected in parallel to the outlet of the alcohol metering tank (11). Each alcohol-alkali mixing tank (12) is provided with a corresponding independent conveying pipeline (45) at its outlet. The outlet ends of the multiple independent conveying pipelines (45) are connected in parallel to the inlet of the multi-stage emulsifying pump (14).

4. The continuous xanthate production apparatus according to claim 2, characterized by The alcohol-alkali mixing tank (12) is provided with a first air inlet (6) and a tail gas outlet. A tail gas treatment pipeline (47) is provided at the tail gas outlet. The alcohol-alkali mixing tank (12) is connected to a tail gas treatment device through the tail gas treatment pipeline (47). The alkali silo (13) is provided with a third air inlet (62). A nitrogen inlet pipeline (63) is provided in parallel on the alkali conveying pipeline (44). The first air inlet (6), the third air inlet (62), and the nitrogen inlet pipeline (63) are all connected to a nitrogen supply pipeline. The valve includes the first air inlet (6). The first check valve (7) is installed at 6), the first control valve (72) is installed at the outlet of the alkali silo (13), and the first double control valve (73) is installed on the alcohol conveying pipeline (43). The temperature control device includes a first jacket (8) fitted around the outer ring of the alcohol-alkali mixing tank (12) and a pipe jacket (83) fitted on the upper part of the feed pipeline (4). The first jacket (8) is connected to the first temperature control pipeline, and the pipe jacket (83) is connected to the fourth temperature control pipeline. A flow meter (9) is installed at the outlet of the multi-stage emulsifying pump (14).

5. The continuous xanthate production apparatus according to claim 1, characterized by, The gas supply device (5) includes a gas storage tank (51) and a precision metering pump (52). The inlet end of the gas inlet pipe (42) is connected to the outlet of the gas storage tank (51), and the outlet end of the gas inlet pipe (42) is connected in parallel to the feed pipe (4). The precision metering pump (52) is installed on the gas inlet pipe (42) between the gas storage tank (51) and the feed pipe (4).

6. The continuous xanthate production apparatus according to claim 5, characterized by The air inlet pipe (42) between the gas storage tank (51) and the precision metering pump (52) is equipped with a second dual control valve (74).

7. The continuous xanthate production apparatus according to claim 1, characterized by The reaction device (2) includes a static reactor (21) and a slurry tank (22) with a stirring assembly. The inlet of the static reactor (21) is connected to the feed pipe (4), and the outlet of the slurry tank (22) is connected to the discharge pipe (41). An intermediate pipe (46) is provided between the static reactor (21) and the slurry tank (22), and the two are connected through the intermediate pipe (46). The stirring assembly of the slurry tank (22) is located in its inner cavity, and a power motor with its shaft end passing through its top wall and connected to the stirring assembly is provided above it.

8. The continuous production apparatus for xanthate according to claim 7, characterized in that, The slurry tank (22) is provided with a second air inlet (61) connected to an external nitrogen supply pipeline at the top. The bottom outlet of the slurry tank (22) is provided with a sampling port (64) connected in parallel with the discharge pipeline (41). The valves include a second check valve (71) provided at the second air inlet (61) and a third double control valve (75) provided at the outlet of the slurry tank (22). The outer ring of the slurry tank (22) is fitted with a second jacket (81), which is connected to a second temperature control pipeline. The outer ring of the static reactor (21) is fitted with a third jacket (82), which is connected to a third temperature control pipeline.

9. The continuous xanthate production apparatus according to claim 7, characterized by The temperature sensing device includes a first thermometer (91) located at the inlet of the static reactor (21) and a second thermometer (92) located at the bottom of the slurry tank (22).

10. The continuous xanthate production apparatus according to claim 1, characterized by The drying device (3) comprises a drying device (31) and a screw pump (32), wherein the drying device (31) is arranged at the outlet end of the discharge pipeline (41), and the screw pump (32) is arranged on the discharge pipeline (41) between the drying device (3) and the slurry tank (22).

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