Header tank capable of treating thionyl chloride gas generated in production of acetyl chloride

Abstract

The utility model discloses an elevated tank capable of treating thionyl chloride gas generated in acetyl chloride production, and belongs to the technical field of elevated tanks. Comprising a head tank and a mechanical box body which is arranged above the head tank and is communicated with the head tank, and a heat exchange pipe is arranged in the head tank; and a gas treatment device is arranged in the mechanical box body. According to the device disclosed by the utility model, gas in the head tank is pumped into the neutralizing liquid tank by starting the sucking pump, then is pumped into the filter tank, and is secondarily filtered by the activated carbon filter screen, so that a workshop is prevented from being filled with strong pungent odor, and great harm to health of production personnel is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-level tanks, and in particular relates to a high-level tank capable of treating thionyl chloride gas generated in the production of acetyl chloride. Background Art

[0002] In the synthesis reaction of raw materials, it is often necessary to transport the corresponding liquid materials to the reactor or other equipment for reaction. The high-level tank is a commonly used equipment in this process, which is used to supply and transport liquid materials and realize natural transportation by using the height difference of the liquid level.

[0003] Acetyl chloride is an organic compound with the chemical formula CH3COCl. It is prepared by the reaction of acetic acid and thionyl chloride. The reaction mixture needs to be heated during the preparation process. In the reaction of preparing acetyl chloride, thionyl chloride is an important liquid raw material. It is a light yellow to red fuming liquid with a strong pungent smell and a boiling point of only 78.8°C. Generally, before the thionyl chloride liquid is transferred to the reactor for reaction, the liquid temperature is kept at 15-20°C for best results. When the liquid thionyl chloride raw material is transported to the reactor through the discharge pipe, the strong pungent smell of the overflow of thionyl chloride will not only fill the entire workshop, but also cause great harm to the health of employees. It is harmful to the body after inhalation or absorption through the skin. It has a strong irritating effect on the eyes, mucous membranes, skin and upper respiratory tract, and can cause burns. If inhaled, it may cause spasm, inflammation and edema of the throat and bronchi, and death.

[0004] Therefore, it is urgent for the utility model to provide a high-level tank for acetyl chloride production which can remove thionyl chloride gas and has both cooling and heating functions. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a high-level tank that can treat thionyl chloride gas generated in the production of acetyl chloride, which is used to deal with the problem that the gas overflowed from the raw material thionyl chloride during the current production of acetyl chloride affects the health of production personnel.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-level tank capable of treating thionyl chloride gas generated by the production of acetyl chloride, comprising a high-level tank and a mechanical box disposed above the high-level tank and connected to the high-level tank, wherein a heat exchange pipe is disposed inside the high-level tank; and a gas processing device is disposed inside the mechanical box;

[0008] The gas processing device comprises an air pump, a neutralizing liquid tank and a filter tank; one side of the air pump is connected to the upper end of the neutralizing liquid tank, and the other side is connected to the filter tank;

[0009] A motor and an upper transfer box are fixed to the upper end of the mechanical box, and a water pump and a heater are provided on the opposite side of the filter box;

[0010] The lower end of the motor is provided with a second gear, the lower end of the upper transfer box is rotatably connected to the hollow shaft, the outer surface of the hollow shaft is sleeved with the first gear, and the first gear is meshed with the second gear;

[0011] The lower end of the hollow shaft extends through the hollow pipe and the high-level tank and is connected to the lower transfer box; the high-level tank is connected to the mechanical box body through the hollow pipe.

[0012] Furthermore, the filter box is arranged on one side inside the mechanical box; an activated carbon filter, fan blades and an exhaust net are arranged inside the filter box, the activated carbon filter is arranged on one side close to the vacuum pump, and the fan blades are arranged on the other side.

[0013] Furthermore, the portion of the hollow shaft between the mounting plates at the upper and lower ends inside the high-position tank is solid, and the remaining portion is hollow.

[0014] Furthermore, the mounting plate is sleeved on the outer surface of the hollow shaft, and a hollow channel is provided inside the mounting plate.

[0015] Furthermore, one end of the hollow channel close to the edge of the mounting plate is communicated with the interior of the heat exchange tube, and the other end is communicated with the interior of the hollow shaft.

[0016] Furthermore, the outer surface of the heat exchange tube is provided with metal fins.

[0017] Beneficial effects of the utility model:

[0018] (1) Having both cooling and heating functions: The utility model has both cooling and heating functions. The heating wire is heated by the heater, thereby heating the high-level tank body. The temperature is sensed by the temperature sensor and displayed on the surface of the high-level tank. When cooling is required, the water pump is started to inject external cooling water into the upper transfer box, which is then transferred from the upper transfer box to the hollow shaft, hollow channel and heat exchange tube in turn, and finally enters the lower transfer box for concentration and discharge.

[0019] (2) Remove thionyl chloride gas to ensure the health of production personnel: The utility model can start the vacuum pump to draw the thionyl chloride gas in the high-level tank into the neutralization liquid tank, and then draw the gas into the filter box after neutralization, and then pass through the activated carbon filter in the filter box for secondary filtration, and then be discharged from the exhaust net by the fan blades, so as to avoid the strong irritation of thionyl chloride gas filling the entire workshop and ensure the health of production personnel.

[0020] (3) Adjustable temperature: The utility model heats the heating wire to increase the temperature, and cools down the temperature by pumping cooling water through a water pump; the cooling water enters the hollow shaft, the hollow channel and the heat transfer tube through the upper transfer box once, and finally enters the lower transfer box. During the reaction heating process, if the reaction temperature is too high, cooling water can be introduced to cool it down. If the temperature is too low, stop adding cooling water and increase the temperature through the heating wire; therefore, the utility model can adjust the temperature at will according to actual production needs to ensure normal production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the outer surface of the utility model;

[0023] Figure 3 This is a top view of the installation plate of the utility model;

[0024] Figure 4 This is a top view of the heat exchange tube of the utility model;

[0025] Figure 5 This is a schematic diagram of the surface of the mechanical box of the utility model;

[0026] In the figure: 1. Activated carbon filter; 2. Vacuum pump; 3. Neutralizing liquid tank; 4. Filter box; 5. Mounting frame; 6. High-level tank; 7. Mounting plate; 8. Heat exchange tube; 9. Stirring blade; 10. Temperature sensor; 11. Lower transfer box; 12. Heating wire; 13. Heater; 14. Hollow shaft; 15. Water pump; 16. Upper transfer box; 17. First gear; 18. Motor; 19. Second gear; 20. Mechanical box; 21. Metal fins; 22. Fan blades; 23. Exhaust net; 24. Hollow pipe; 25. Hollow channel. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative, and the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0028] like Figures 1 to 5As shown, the utility model provides a high-level tank capable of treating thionyl chloride gas generated by producing acetyl chloride, comprising a high-level tank 6 and a mechanical box 20 arranged above the high-level tank 6 and connected to the high-level tank 6, the high-level tank 6 and the mechanical box 20 are both fixed on a mounting frame 5, the mechanical box 20 is arranged above the high-level tank 6, mounting plates 7 are arranged at both upper and lower ends of the high-level tank 6, a heat exchange tube 8 is arranged in the middle of the mounting plate 7; a gas processing device is arranged inside the mechanical box 20; the high-level tank 6 and the mechanical box 20 are connected through a hollow pipe 24. When the raw material thionyl chloride liquid is poured into the reactor, the strong irritating gas generated rises and enters the lower end of the liquid level of the neutralizing liquid tank 3 inside the mechanical box 20. After neutralization, the gas rises from the liquid level to the blank part at the upper end of the neutralizing liquid tank 3, and then the neutralized gas is extracted by the vacuum pump 2 and enters the filter box 4 on the left side of the mechanical box 20. After secondary filtration by the multi-layer activated carbon filter 1, it is fanned by the fan blade 22 and discharged through the exhaust net 23 to prevent the thionyl chloride gas from overflowing and affecting the health of production employees. After the motor 18 at the upper end of the mechanical box 20 is powered on, the second gear 19 connected to the lower output end rotates, driving the first gear 17 meshing with the second gear 19 to rotate, and the first gear 17 rotates and then drives the hollow shaft 14 to rotate, so that the stirring blades inside the high-level tank 6 rotate to achieve the purpose of uniform stirring. The body cavity of the high-level tank 6 is provided with a heating wire 12 near the surface of the material, which is heated by the heater 13 fixed on the right side of the mechanical box 20 to provide temperature for the material reaction. The upper and lower ends of the hollow shaft 14 inside the high-level tank 6 are respectively fixed with mounting plates 7, and heat exchange tubes 8 are evenly fixed between the two mounting plates 7. The water pump 15 on the right side inside the mechanical box 20 draws cooling water into the upper transfer box 16, and then flows into the hollow channel 25 inside the upper mounting plate 7 through the hollow shaft 14, and is introduced into the heat exchange tube 8 through the hollow channel 25. Under the action of gravity, the cooling water then flows into the lower mounting plate 7, and flows into the lower transfer box 11 through the hollow shaft 14 and is discharged in a centralized manner, thereby achieving the purpose of cooling.

[0029] like Figure 1 , Figure 2 and Figure 5As shown, the mechanical box 20 includes a gas treatment device, a motor 18, an upper transfer box 16, a water pump 15, a heater 13, a first gear 17, a second gear 19 and a hollow shaft 14; the gas treatment device is arranged on the left side of the mechanical box 20, the motor 18 and the upper transfer box 16 are fixed at the upper end of the mechanical box 20, the water pump 15 and the heater 13 are arranged on the right side of the mechanical box 20, and the second gear 19 is connected to the output end of the motor 18; the lower end of the upper transfer box 16 is connected to the hollow shaft 14, and the right side is connected to the water pump 15; the thionyl chloride gas inside the high-level tank 6 rises and enters the gas treatment device, and the treated thionyl chloride gas is discharged to the outside air to prevent the untreated gas from causing harm to the health of production employees. The water pump 15 draws cooling water into the upper transfer box 16, flows into the hollow shaft 14, and then is introduced into the mounting plate 7 and the heat exchange tube 8 inside the high-level tank 6 to achieve the purpose of cooling, which is used to ensure the temperature of thionyl chloride and can also regulate the temperature during the reaction process.

[0030] The gas treatment device includes an air pump 2, a neutralization liquid tank 3 and a filter box 4; one side of the air pump 2 is connected to the upper end of the neutralization liquid tank 3, and the other side is connected to the filter box 4. After the thionyl chloride gas in the high-level tank 6 rises, it is introduced into the lower end of the neutralization liquid phase 3 through a pipeline. The neutralized gas is extracted by the air pump 2 into the filter box 4 for secondary filtration, and then discharged into the outside air to prevent harmful thionyl chloride gas from overflowing into the production workshop and damaging the health of employees.

[0031] The filter box 4 is arranged on the left side inside the mechanical box 20; a plurality of activated carbon filters 1, fan blades 22 and exhaust nets 23 are arranged inside the filter box 4, the activated carbon filter 1 is arranged on the side close to the vacuum pump 2, and the fan blades 22 are arranged on the leftmost side; the exhaust net 23 is arranged on the left side and the front and rear sides of the mechanical box 20 on the left side of the fan blades 22, and the exhaust net 23 is arranged on the entire left side of the mechanical box 20, and the right boundary of the exhaust net 23 arranged on the front and rear sides should have a certain distance from the activated carbon filter 1. The neutralized gas is drawn into the right side of the filter box 4 by the vacuum pump 2, and is filtered again by a plurality of activated carbon filters 1, and is discharged by the fan blades 22 through the exhaust net 23.

[0032] like Figure 1 , Figure 3 and Figure 4 As shown, the lower end of the motor 18 is provided with a second gear 19, the lower end of the upper transfer box 16 is rotatably connected to the hollow shaft 14, the outer surface of the hollow shaft 14 is sleeved with the first gear 17, and the first gear 17 is meshed and connected with the second gear 19. After the motor 18 is powered on, the second gear 19 connected to the output end of the lower end rotates, driving the first gear 17 meshed and connected with the second gear 19 to rotate, and then the first gear 17 drives the hollow shaft 14 to rotate, so that the stirring blade 9 stirs the material inside the high tank 6 to achieve the purpose of uniform stirring.

[0033] The upper end of the hollow shaft 14 is connected to the lower end of the upper transfer box 16, and the lower end extends through the hollow pipe 24 and the high-level tank 6 and is connected to the lower transfer box 11. The part of the hollow shaft 14 between the upper and lower mounting plates 7 inside the high-level tank 6 is solid, and the rest of the part is hollow. The hollow shaft 14 and the center positions of the mounting plates 7 at the upper and lower ends are connected by holes, and the outer edge of the hollow channel 25 inside the mounting plate 7 is connected by holes with the heat exchange tube 8. After the water pump 15 draws cooling water into the upper transfer box 16, the cooling water flows into the hollow part of the upper end of the hollow shaft 14 under the action of gravity, and then is introduced into the hollow channel 25 inside the mounting plate 7 at the upper end, and flows into the heat exchange tube 8 from the hole communicating with the heat exchange tube 8 through the hollow channel 25, and flows into the hollow channel 25 inside the mounting plate 7 at the lower end again under the action of gravity, and finally concentrates in the lower transfer box 11 and then is discharged.

[0034] The high-level tank 6 includes a mounting plate 7, a heat exchange tube 8, a temperature sensor 10, a stirring blade 9 and a hollow shaft 14. The mounting plate 7 is sleeved on the upper and lower outer surfaces of the hollow shaft 14 inside the high-level tank 6. A number of evenly distributed hollow channels 25 are provided inside the mounting plate 7. The center positions of the hollow channels 25 are respectively connected to the hollow parts of the hollow shaft 14. The hollow channels 25 are connected to the heat exchange tube 8 on one side of the outer edge of the mounting plate 7. The cooling water flows through the hollow at the upper end of the hollow shaft 14 into the mounting plate 7 at the upper end, the heat exchange tube 8 and the mounting plate 7 at the lower end in turn. The cooling water flows inside the high-level tank 6 to play a role in cooling.

[0035] A plurality of metal fins 21 are evenly arranged on the outer surface of the heat exchange tube 8, the upper end of which is communicated with the upper mounting plate 7 inside the high-level tank 6, and the lower end of which is communicated with the lower mounting plate 7 inside the high-level tank 6, and is evenly distributed on the outer edge of the mounting plate 7, and is communicated with the hollow channel 25 inside the mounting plate 7; the cooling water flows into the heat exchange tube 8 through the upper mounting plate 7, and the cooled heat exchange tube 8 contacts the material in the high-level tank 6, so that the thionyl chloride is kept at a lower temperature, and the metal fins 21 on the surface of the heat exchange tube 8 increase the contact area with the material, thereby increasing the heat dissipation area and maintaining a better temperature range.

[0036] The heater 13 is fixed on the right side inside the mechanical box 20 and is electrically connected to the heating wire 12 in the inner cavity of the high-level tank 6, so that the heating wire 12 is heated and the temperature is raised to the reaction temperature during the material reaction. The temperature is sensed by the temperature sensor 10 at the lower end of the high-level tank 6 and displayed on the display on the surface of the high-level tank 6. If the temperature is too high, cooling water can be pumped by the water pump 15 to cool it down to ensure the normal progress of the reaction.

[0037] The lower transfer box 11 and the heating wire 12 are arranged inside the inner cavity of the high-level tank 6. The heating wire is fixed on the surface of the side in contact with the material and is heated by the heater 13 to provide temperature for the reaction. The lower transfer box 11 is connected to the hollow shaft 14 that penetrates the inner cavity of the high-level tank 6, collects the cooling water after it flows through, and then discharges it centrally through the pipeline.

[0038] The use method of the utility model: when the raw material thionyl chloride liquid is poured into the reactor, the strong irritating gas generated rises and enters the lower end of the liquid level of the neutralizing liquid tank 3 inside the mechanical box 20. After the gas is neutralized, it rises from the liquid level to the blank part of the upper end of the neutralizing liquid tank 3, and then the neutralized gas is extracted by the vacuum pump 2 and enters the filter box 4 on the left side of the mechanical box 20. After secondary filtration by the multi-layer activated carbon filter 1, it is fanned by the fan blade 22 and discharged through the exhaust net 23 to prevent the overflow of thionyl chloride gas from affecting the health of production employees. After the motor 18 at the upper end of the mechanical box 20 is powered on, the second gear 19 connected to the lower output end rotates, driving the first gear 17 meshing with the second gear 19 to rotate, and the first gear 17 rotates and then drives the hollow shaft 14 to rotate, so that the stirring blades inside the high-level tank 6 rotate to achieve the purpose of uniform stirring. The surface of the inner cavity of the body of the high-level tank 6 near the material is provided with a heating wire 12, which is heated by the heater 13 fixed on the right side of the mechanical box 20 to provide temperature for the material reaction. The hollow shaft 14 inside the high-level tank 6 is fixed with mounting plates 7 at both ends, and heat exchange tubes 8 are evenly fixed between the two mounting plates 7. The water pump 15 on the right side of the mechanical box 20 draws cooling water into the upper transfer box 16, and then flows into the hollow channel 25 inside the upper mounting plate 7 through the hollow shaft 14, and is introduced into the heat exchange tube 8 through the hollow channel 25. Under the action of gravity, the cooling water flows into the lower mounting plate 7 again, and flows into the lower transfer box 11 through the hollow shaft 14 for centralized discharge, which can achieve the purpose of cooling. During the reaction, the material temperature rises to the reaction temperature, and the temperature is sensed by the temperature sensor 10 at the lower end of the high-level tank 6, and the temperature is displayed by the display on the surface of the high-level tank 6; if the temperature is too high, the water pump 15 can also draw cooling water to cool it down to ensure the normal progress of the reaction.

Claims

1. A high-level tank capable of treating thionyl chloride gas generated in the production of acetyl chloride, characterized in that: It comprises a high-level tank (6) and a mechanical box (20) arranged above the high-level tank (6) and in communication with the high-level tank (6), wherein a heat exchange pipe (8) is arranged inside the high-level tank (6); and a gas processing device is arranged inside the mechanical box (20); The gas processing device comprises an air pump (2), a neutralizing liquid tank (3) and a filter tank (4); one side of the air pump (2) is connected to the upper end of the neutralizing liquid tank (3), and the other side is connected to the filter tank (4); A motor (18) and an upper transfer box (16) are fixed to the upper end of the mechanical box (20), and a water pump (15) and a heater (13) are provided on the side opposite to the filter box (4); A second gear (19) is provided at the lower end of the motor (18); the lower end of the upper transfer box (16) is rotatably connected to the hollow shaft (14); the outer surface of the hollow shaft (14) is sleeved with a first gear (17); the first gear (17) and the second gear (19) are meshingly connected; The lower end of the hollow shaft (14) extends through the hollow pipe (24) and the high-level tank (6) and is connected to the lower transfer box (11); the high-level tank (6) is connected to the mechanical box (20) through the hollow pipe (24).

2. The high-level tank capable of treating thionyl chloride gas generated by producing acetyl chloride according to claim 1, characterized in that: The filter box (4) is arranged on one side inside the mechanical box (20); an activated carbon filter screen (1), fan blades (22) and an exhaust screen (23) are arranged inside the filter box (4); the activated carbon filter screen (1) is arranged on one side close to the air pump (2), and the fan blades (22) are arranged on the other side.

3. The elevated tank capable of treating thionyl chloride gas generated by producing acetyl chloride according to claim 1, characterized in that: The portion of the hollow shaft (14) between the mounting plates (7) at the upper and lower ends inside the high-position slot (6) is solid, and the remaining portion is hollow.

4. The elevated tank capable of treating thionyl chloride gas generated by producing acetyl chloride according to claim 3, characterized in that: The mounting plate (7) is sleeved on the outer surface of the hollow shaft (14), and a hollow channel (25) is provided inside the mounting plate (7).

5. The high-level tank capable of treating thionyl chloride gas generated by producing acetyl chloride according to claim 4, characterized in that: One end of the hollow channel (25) close to the edge of the mounting plate (7) is in communication with the interior of the heat exchange tube (8), and the other end is in communication with the interior of the hollow shaft (14).

6. The elevated tank capable of treating thionyl chloride gas generated by producing acetyl chloride according to claim 1, characterized in that: The outer surface of the heat exchange tube (8) is provided with metal fins (21).

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