A vapor-phase distillation device for ammonia vapor in the APT production process

Abstract

This utility model discloses a vapor-phase distillation device for ammonia-containing vapor in the APT production process, relating to the field of vapor-phase distillation equipment. It includes a support frame, on which a distillation column is fixedly connected. An outer protective layer is provided on the outside of the distillation column, with a cavity between the outer protective layer and the outside of the distillation column. A gas conveying mechanism is provided inside the distillation column, including a conical funnel with a fixing ring fixed to its outer side. Ammonia-containing vapor first enters the cavity. Due to its high temperature, the vapor heats and insulates the outside of the distillation column as it passes through the cavity, preventing the internal temperature from dropping. The vapor is then discharged through an exhaust trough and introduced into the area above the fixing ring to participate in the distillation process. The high temperature of the ammonia vapor itself heats and insulates the distillation column, and combined with the preheating effect of the electric heating element, energy utilization is improved.

Description

Technical Field

[0001] This utility model relates to the field of gas phase distillation equipment, and in particular to a gas phase distillation device for ammonia vapor in the APT production process. Background Technology

[0002] In the production of APT (ammonium paratungstate), the treatment of ammonia vapor is a crucial step. Ammonia, as a key raw material or byproduct in the production process, can be recycled and reused, which can not only reduce production costs but also reduce environmental pollution.

[0003] Traditional vapor-phase distillation equipment often has high energy consumption. Due to the lack of effective insulation measures, ammonia-containing vapors suffer significant heat loss during processing, requiring a large amount of additional energy to maintain the temperature conditions required for distillation. At the same time, uneven distribution of vapors inside the equipment leads to low distillation efficiency, making it difficult to achieve the desired ammonia recovery rate.

[0004] Therefore, it is necessary to propose a vapor-phase distillation device containing ammonia vapor in the APT production process to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a vapor-phase distillation device for ammonia-containing vapor in the APT production process, addressing the problems of high energy consumption in traditional vapor-phase distillation equipment, significant heat loss of ammonia-containing vapor during processing due to the lack of effective insulation measures, requiring substantial additional energy to maintain the temperature conditions necessary for distillation, and uneven vapor distribution within the equipment leading to low distillation efficiency and difficulty in achieving ideal ammonia recovery rates.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a gas-phase distillation device for ammonia vapor in the APT production process, comprising a support frame, a distillation column fixedly connected to the support frame, an outer protective layer provided on the outside of the distillation column, and a cavity left between the outer protective layer and the outside of the distillation column;

[0007] The distillation column is equipped with a gas conveying mechanism, which includes a conical funnel. A fixing ring is fixed to the outside of the conical funnel, and an exhaust groove is opened at the top of the fixing ring. The exhaust groove is connected to the cavity.

[0008] The bottom of the conical funnel has an opening, and an electric heating tube is provided between the outer side and the inner wall of the conical funnel.

[0009] Preferably, the outer side of the fixing ring has a connection port, which is connected to the inside of the cavity through a connecting pipe.

[0010] Preferably, the distillation column is provided with an exhaust port at the top and a liquid drain port at the bottom, and both the exhaust port and the liquid drain port are connected to the interior of the distillation column;

[0011] The drain outlet is connected to a reboiler, which is a thermosiphon reboiler.

[0012] Preferably, the outer protective layer has steam ports at both the top and bottom ends, which are used to transport ammonia-containing steam.

[0013] Preferably, a packing plate is provided at the top of the inside of the distillation column.

[0014] Preferably, temperature sensors are installed inside both the cavity and the distillation column.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. In the actual operation of this utility model, ammonia-containing vapor first enters the cavity. Due to its high temperature, the ammonia-containing vapor heats and insulates the outside of the distillation column as it passes through the cavity, preventing the internal temperature of the distillation column from dropping. Subsequently, the ammonia-containing vapor is discharged through the exhaust channel and introduced into the area above the fixed ring to participate in the distillation process. The high temperature of the ammonia-containing vapor itself heats and insulates the distillation column. Combined with the preheating effect of the electric heating tube, the energy utilization rate is improved, and the additional energy consumption is significantly reduced.

[0017] 2. The electric heating tube can preheat the ammonia-containing vapor entering the gas conveying mechanism, thereby improving the efficiency of subsequent distillation. At the same time, it can also prevent the ammonia-containing vapor from passing through the cavity and causing heat loss.

[0018] 3. When steam participates in distillation, the resulting liquid will fall due to its own gravity. At this time, the conical funnel can collect the liquid and discharge it downwards. Meanwhile, the heat generated by the electric heating tube can reheat the liquid remaining on the conical funnel, causing it to turn into steam and participate in distillation again. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the vapor-phase distillation equipment containing ammonia vapor in the APT production process of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the utility support frame.

[0021] Figure 3 This is a schematic diagram of the gas delivery mechanism of this utility model.

[0022] Figure 4 This utility model Figure 1 Enlarged diagram of point A in the middle.

[0023] In the diagram: 1. Support frame; 2. Distillation column; 3. Drain outlet; 4. Exhaust outlet; 5. Outer protective layer; 6. Conical funnel; 7. Fixing ring; 8. Through port; 9. Connection port; 10. Exhaust trough; 11. Connecting pipe; 12. Electric heating tube; 13. Steam port; 14. Packing plate. Detailed Implementation

[0024] This utility model provides, for example Figures 1-4 The device shown is a vapor-phase distillation equipment containing ammonia vapor in the APT production process. It includes a support frame 1, on which a distillation column 2 is fixedly connected. The support frame 1 is made of high-strength alloy steel and is fixed to the ground by bolts, providing solid support for the entire equipment and effectively resisting the vibration generated during equipment operation, thus ensuring the stability of the equipment.

[0025] An outer protective layer 5 is provided on the outside of the distillation column 2, and a cavity is left between the outer protective layer 5 and the outside of the distillation column 2;

[0026] The distillation column 2 is equipped with a gas delivery mechanism, which includes a conical funnel 6. A fixing ring 7 is fixed on the outside of the conical funnel 6. An exhaust groove 10 is opened at the top of the fixing ring 7, and the exhaust groove 10 is connected to the cavity.

[0027] A conical funnel 6 has an opening 8 at its bottom end, and an electric heating tube 12 is installed between the outer and inner walls of the conical funnel 6. The outer protective layer 5 has steam ports 13 at both its top and bottom, which are used to transport ammonia-containing vapor. Ammonia-containing vapor can be introduced into the cavity through one of the steam ports 13.

[0028] In the actual operation of this utility model, ammonia vapor first enters the cavity. Since ammonia vapor itself has a high temperature, when ammonia vapor passes through the cavity, it will heat and insulate the outside of the distillation column 2, preventing the temperature inside the distillation column 2 from dropping. Subsequently, the ammonia vapor can be discharged through the exhaust trough 10 and introduced into the area above the fixed ring 7 to participate in the distillation process.

[0029] The electric heating element 12 adopts an explosion-proof design, which has high heating efficiency and strong safety. It can preheat the ammonia-containing vapor entering the gas conveying mechanism, improve the efficiency of subsequent distillation, and at the same time avoid the problem of heat loss caused by ammonia-containing vapor passing through the cavity.

[0030] The liquid produced by the steam participating in the distillation will fall due to its own gravity. At this time, the conical funnel 6 can collect the liquid and discharge it downwards. Meanwhile, the heat generated by the electric heating tube 12 can reheat the liquid remaining on the conical funnel 6, causing it to turn into steam and participate in the distillation again.

[0031] A connection port 9 is provided on the outer side of the fixing ring 7, and the connection port 9 is connected to the inside of the cavity through the connecting pipe 11.

[0032] The distillation column 2 is equipped with an exhaust port 4 at the top and a liquid drain port 3 at the bottom. Both the exhaust port 4 and the liquid drain port 3 are connected to the interior of the distillation column 2. The liquid drain port 3 is connected to a reboiler, which is a thermosiphon reboiler. Specifically, the reboiler forms a circulation loop with the bottom of the distillation column 2 through a pipeline, which can vaporize part of the liquid at the bottom of the column and send it back to the distillation column 2, providing a continuous gaseous medium for the distillation process.

[0033] The top of the distillation column 2 is equipped with a packing plate 14, which is filled with high-efficiency distillation packing, such as metal Pall ring packing. This packing has the characteristics of large specific surface area and high mass transfer efficiency, which can increase the contact area and contact time of the gas and liquid phases and promote the separation of various components in the ammonia vapor.

[0034] Temperature sensors are installed inside both the cavity and the distillation column 2 to monitor the temperature in real time.

Claims

1. A gas phase rectifying device containing ammonia vapor in an APT production process, comprising a support frame (1), a rectifying tower (2) is fixedly connected on the support frame (1), characterized in that: An outer protective layer (5) is provided on the outside of the distillation column (2), and a cavity is left between the outer protective layer (5) and the outside of the distillation column (2); The distillation column (2) is equipped with a gas conveying mechanism, which includes a conical funnel (6). A fixing ring (7) is fixed on the outside of the conical funnel (6). An exhaust groove (10) is opened at the top of the fixing ring (7). The exhaust groove (10) is connected to the cavity. The conical funnel (6) has an opening (8) at its bottom end, and an electric heating tube (12) is provided between the outer side and the inner wall of the conical funnel (6).

2. The apparatus for gas phase rectification of ammonia containing vapor in the APT production process according to claim 1, characterized in that: The fixing ring (7) has a connection port (9) on its outer side, and the connection port (9) is connected to the cavity through the connecting pipe (11).

3. The apparatus for gas phase rectification of ammonia containing vapor in the APT production process according to claim 2, characterized in that: The distillation column (2) is provided with an exhaust port (4) at the top and a liquid drain port (3) at the bottom. Both the exhaust port (4) and the liquid drain port (3) are connected to the interior of the distillation column (2). The drain port (3) is connected to a reboiler, which is a thermosiphon reboiler.

4. The vapor-phase distillation equipment for ammonia vapor in the APT production process according to claim 1, characterized in that: The outer protective layer (5) has steam ports (13) at both the top and bottom of its outer side, and the steam ports (13) are used to transport ammonia-containing steam.

5. The apparatus for gas phase rectification of ammonia containing vapor in an APT production process according to claim 4, characterized in that: The distillation column (2) is equipped with a packing plate (14) at its top.

6. The apparatus for gas phase rectification of ammonia containing vapor in an APT production process according to claim 1, characterized in that: Temperature sensors are installed inside both the cavity and the distillation column (2).

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