Rectification device for producing diamine compound

Abstract

The utility model belongs to rectifying column technical field, specifically disclose a rectifying column for diamine compound production, including rectifying column, the outside of rectifying column is provided with safety mechanism, and safety mechanism includes rectangular frame, the outer surface fixed communication in rectifying column's outer surface of rectangular frame, the inner wall fixed connection of rectangular frame has round cylinder, the inner bottom wall fixed connection of round cylinder has first stress spring, the top fixed connection of first stress spring has lifting cylinder, the inside slide connection of round cylinder has clamping block, the outside of rectifying column is provided with air pump, and the input fixed communication of air pump has suction tube. This rectifying column for diamine compound production, clamping block can be completely in the inside of round cylinder, no longer be in sealed door inside, so also can not limit the sealing door, the staff of this time can open sealed door freely, after waiting air replacement is finished, can enter the inside of rectifying column and carry out inspection work.

Description

Technical Field

[0001] This utility model belongs to the technical field of distillation apparatus, specifically a distillation apparatus for the production of diamine compounds. Background Technology

[0002] Distillation units are key equipment for removing moisture or solvents from materials, ensuring material purity in chemical production. In the production of diamine compounds, plate distillation columns can accurately separate diamines and impurities from reaction products, ensuring that the final product meets purity standards, making them core separation equipment.

[0003] Currently, existing distillation columns require staff to periodically enter the interior through manholes to inspect the internal structure. However, some staff forget to replace the air inside the column before entering, thus failing to ensure the oxygen level is within the column, which poses a significant safety hazard.

[0004] Therefore, there is a need to design a device that can automatically replace the gas inside the distillation column before personnel enter. Utility Model Content

[0005] To address the above technical problems, this utility model provides a device that can automatically replace the gas inside a distillation column before personnel enter, thereby solving the problem that there are significant safety hazards caused by the inability to automatically replace the internal gas when personnel are performing maintenance on the inside of the distillation column.

[0006] To solve the above technical problems, the technical solution of this utility model is: a distillation apparatus for the production of diamine compounds, including a distillation column, wherein a safety mechanism is provided on the outside of the distillation column;

[0007] The safety mechanism includes a rectangular frame connected to the bottom of the distillation column. A circular cylinder is fixedly connected to the top wall of the rectangular frame. A first force spring is fixedly connected to the inner bottom wall of the circular cylinder. A lifting cylinder is fixedly connected to the top of the first force spring. A first slide rail is provided on the side wall of the circular cylinder. A locking block is slidably connected in the first slide rail. An air pump is provided on the outside of the distillation column. An air extraction pipe is fixedly connected to the input end of the air pump. An air outlet pipe is fixedly connected to the output end of the air pump. The other end of the air outlet pipe is connected to the top of the circular cylinder.

[0008] Furthermore, a support base is fixedly connected to the outer surface of the distillation column, and the bottom surface of the air pump is fixedly connected to the upper surface of the support base.

[0009] Furthermore, a sealing door is movably hinged to one side of the rectangular frame, and a second slide corresponding to the first slide is provided on the side wall of the sealing door.

[0010] Furthermore, a second force spring is fixedly connected to the inner wall of the second slide, and the other end of the second force spring is in contact with one end of the locking block. The locking block is slidably connected in the second slide, and a bullseye bearing is fixedly connected to one end of the locking block. The outer surface of the bullseye bearing is in contact with the outer surface of the lifting cylinder.

[0011] Furthermore, the outer surface of the distillation column is fixedly connected to an inlet pipe and a reflux pipe, the top of the distillation column is fixedly connected to a gas delivery pipe, and the bottom of the distillation column is fixedly connected to a discharge pipe.

[0012] Furthermore, a connecting pipe is fixedly connected to the top of the distillation column, and a solenoid valve is fixedly connected to the outer surface of the connecting pipe.

[0013] This utility model has the following advantages compared with the prior art:

[0014] 1. This utility model incorporates an air pump that draws outside air into the outlet pipe via an extraction pipe and delivers it to a cylindrical container, increasing the internal pressure. A lifting cylinder is slidably connected inside the cylindrical container. Under pressure, the lifting cylinder moves downward, compressing a first force spring until it contracts. The lifting cylinder then moves to the slotted hole on the surface of the cylindrical container, allowing gas to pass through the lifting cylinder and the slotted hole into the rectangular frame, and further into the distillation column body for gas replacement, thus reducing safety hazards.

[0015] 2. By setting up a locking block and a bullseye bearing, when the two strip holes of the lifting cylinder and the circular cylinder coincide, allowing the gas inside the circular cylinder to enter the distillation column, the locking block and the bullseye bearing will be located in the recess on the surface of the lifting cylinder. Therefore, the locking block will be completely inside the circular cylinder and no longer in the sealed door, so it will not limit the sealing door. At this time, the staff can freely open the sealed door and wait for the air to be replaced before entering the interior of the distillation column for inspection. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional structural diagram of the solenoid valve of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the air pump of this utility model from the right side;

[0019] Figure 4 This is a right-side three-dimensional structural diagram of the circular cylinder of this utility model;

[0020] Figure 5This is a right-side three-dimensional structural schematic diagram of the first force-bearing spring of this utility model.

[0021] In the diagram: 1. Distillation column; 2. Safety mechanism; 201. First slide; 202. Circular cylinder; 203. Gas outlet pipe; 204. Air pump; 205. Extraction pipe; 206. Lifting cylinder; 207. First force-bearing spring; 208. Locking block; 209. Second force-bearing spring; 3. Rectangular frame; 4. Sealing door; 401. Second slide; 5. Inlet pipe; 6. Solenoid valve; 7. Connecting pipe; 8. Return pipe; 9. Gas delivery pipe; 10. Support base; 11. Bullseye bearing; 12. Discharge pipe. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figures 1 to 5 The distillation apparatus for producing diamine compounds shown includes a distillation column 1. A safety mechanism 2 is provided on the outside of the distillation column 1. The safety mechanism 2 can ensure that personnel can change the gas inside the distillation column 1 before entering the distillation column 1, thereby reducing safety hazards.

[0024] Safety mechanism 2 includes a rectangular frame 3, which is connected to one side wall of the bottom of distillation column 1, ensuring that gas entering the rectangular frame 3 enters the distillation column 1. To enable automatic gas replacement, a circular cylinder 202 is fixedly connected to the top wall of the rectangular frame 3. A first force spring 207 is fixedly connected to the inner bottom wall of the circular cylinder 202, and a lifting cylinder 206 is fixedly connected to the top of the first force spring 207. To facilitate gas discharge, a strip-shaped hole is provided on the side wall of the lifting cylinder 206, with a groove above the hole. A strip-shaped hole of the same size is also provided on the side wall of the circular cylinder 202. When the lifting cylinder 206 descends to a certain position, the two strip-shaped holes overlap, allowing the gas filled into the circular cylinder 202 to be discharged into the rectangular frame 1. Inside the frame 3, the lifting cylinder 206 is tightly fitted to the inner wall of the circular cylinder 202, and a sealing ring is provided to ensure sufficient airtightness. In order to lock the lifting cylinder 206 to a certain position, a first slide 201 is provided on the side wall of the circular cylinder 202. A locking block 208 is slidably connected in the first slide 201. In order to allow the sealing door 4 to open when the locking block 208 is mostly located in the first slide 201, the length of the locking block 208 is designed to be slightly longer than the thickness of the side wall of the circular cylinder 202. An air pump 204 is provided on the outside of the distillation column 1. The input end of the air pump 204 is fixedly connected to the suction pipe 205, and the output end of the air pump 204 is fixedly connected to the outlet pipe 203. The other end of the outlet pipe 203 is connected to the top of the circular cylinder 202.

[0025] In order to improve the stability of the device, a support base 10 is fixedly connected to the bottom outer surface of the distillation column 1, and the bottom surface of the air pump 204 is fixedly connected to the upper surface of the support base 10.

[0026] In order to ensure the airtightness of the safety mechanism, a sealing door 4 is movably hinged to one side of the rectangular frame 3. To facilitate opening, a handle is provided on the sealing door 4. With the handle and sealing door 4 provided, the handle can be used to pull the sealing door 4 to open the rectangular frame 3 and enter the interior of the equipment. A second slide 401 corresponding to the first slide 201 is provided on the side wall of the sealing door 4.

[0027] A second force spring 209 is fixedly connected to the inner wall of the second slide rail 401. The other end of the second force spring 209 is in contact with one end of the locking block 208. The locking block 208 is slidably connected inside the second slide rail 401. One end of the locking block 208 is fixedly connected to a bullseye bearing 11. The outer surface of the bullseye bearing 11 is in contact with the outer surface of the lifting cylinder 206. By providing the second force spring 209, when the groove position of the lifting cylinder 206 moves to the side of the bullseye bearing 11, the second force spring 209 can push the locking block 208 and the bullseye bearing 11 to move towards the groove position and completely move into the interior of the circular cylinder 202, stopping the limiting of the sealing door 4. The presence of the bullseye bearing 11 can reduce the friction between the lifting cylinder 206 and the locking block 208.

[0028] An inlet pipe 5 and a reflux pipe 8 are fixedly connected to the outer surface of the distillation column 1. A gas delivery pipe 9 is fixedly connected to the top of the distillation column 1, and a discharge pipe 12 is fixedly connected to the bottom of the distillation column 1. By providing the inlet pipe 5, hot gas can be delivered into the interior of the distillation column 1, while the reflux pipe 8 can deliver the raw materials into the interior of the distillation column 1. The discharge pipe 12 can guide unreacted raw materials out of the interior of the distillation column 1, and the gas delivery pipe 9 can discharge the hot gas and evaporated products inside the distillation column 1.

[0029] The top of the distillation column 1 is fixedly connected to a connecting pipe 7, and a solenoid valve 6 is fixedly connected to the outer surface of the connecting pipe 7. By setting the solenoid valve 6, when air needs to be replaced, the operation of the solenoid valve 6 can connect the inside of the equipment with the outside through the connecting pipe 7, thereby achieving the purpose of gas replacement.

[0030] The specific working process of this utility model is as follows:

[0031] When the equipment needs maintenance, the operator needs to control the operation of the air pump 204 and the solenoid valve 6. The air pump 204 draws outside air into the outlet pipe 203 through the suction pipe 205 and delivers it to the cylindrical cylinder 202, increasing the pressure inside. This pressure pushes the lifting cylinder 206 downwards, compressing the first force spring 207 until it reaches the opening on the surface of the cylindrical cylinder 202. At this point, gas enters the rectangular frame 3 through the opening of the lifting cylinder 206 and the cylindrical cylinder 202, further entering the distillation column 1. The air entering the distillation column 1 ultimately pushes the air inside the column through the connecting pipe 7 to be discharged to the outside space, thus completing the displacement process. At this time, the locking block 208 and... Under the force of the second force spring 209, the bullseye bearing 11 will be located in the recess on the surface of the lifting cylinder 206. It can be understood that when the air pump 204 is not running, the second force spring 209 is in a compressed state, and the locking block 208 will always be between the cylindrical cylinder 202 and the sealing door 4. Therefore, under the action of the locking block 208, the sealing door 4 cannot be opened normally. Only when the air pump 204 is running to replace the gas in the distillation column 1 can the sealing door 4 be opened normally. After the maintenance work is completed, the sealing door 4 is closed and the air pump 204 is stopped. The first force spring 207 will push the lifting cylinder 206 to move upward, and the bullseye bearing 11 will re-enter the interior of the sealing door 4 along the inclined surface of the lifting cylinder 206 and squeeze the second force spring 209, thereby completing the limiting work of the sealing door 4 again.

Claims

1. A distillation apparatus for the production of diamine compounds, comprising a distillation column (1), characterized in that: A safety mechanism (2) is provided on the outside of the distillation column (1); The safety mechanism (2) includes a rectangular frame (3), which is connected to the bottom of the distillation column (1). A circular cylinder (202) is fixedly connected to the top wall of the rectangular frame (3). A first force spring (207) is fixedly connected to the inner bottom wall of the circular cylinder (202). A lifting cylinder (206) is fixedly connected to the top of the first force spring (207). A first slide (201) is provided on the side wall of the circular cylinder (202). A locking block (208) is slidably connected in the first slide (201). An air pump (204) is provided on the outside of the distillation column (1). An air extraction pipe (205) is fixedly connected to the input end of the air pump (204). An air outlet pipe (203) is fixedly connected to the output end of the air pump (204). The other end of the air outlet pipe (203) is connected to the top of the circular cylinder (202).

2. The distillation apparatus for producing diamine compounds according to claim 1, characterized in that: The outer surface of the distillation column (1) is fixedly connected to a support base (10), and the bottom surface of the air pump (204) is fixedly connected to the upper surface of the support base (10).

3. The distillation apparatus for producing diamine compounds according to claim 1, characterized in that: A sealing door (4) is movably hinged to one side of the rectangular frame (3), and a second slide (401) corresponding to the first slide (201) is provided on the side wall of the sealing door (4).

4. The distillation apparatus for producing diamine compounds according to claim 3, characterized in that: A second force spring (209) is fixedly connected to the inner wall of the second slide (401). The other end of the second force spring (209) is in contact with one end of the locking block (208). The locking block (208) is slidably connected in the second slide (401). One end of the locking block (208) is fixedly connected to a bullseye bearing (11). The outer surface of the bullseye bearing (11) is in contact with the outer surface of the lifting cylinder (206).

5. A distillation apparatus for producing diamine compounds according to claim 1, characterized in that: The outer surface of the distillation column (1) is fixedly connected to an inlet pipe (5) and a reflux pipe (8), the top of the distillation column (1) is fixedly connected to a gas delivery pipe (9), and the bottom of the distillation column (1) is fixedly connected to a discharge pipe (12).

6. The distillation apparatus for producing diamine compounds according to claim 1, characterized in that: The top of the distillation column (1) is fixedly connected to a connecting pipe (7), and an electromagnetic valve (6) is fixedly connected to the outer surface of the connecting pipe (7).

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