Heat energy recovery structure for rectifying column

Abstract

The utility model relates to rectifying tower technical field, concretely is a kind of heat recovery structure for rectifying tower, including base, setting on the rectifying tower body of base and setting on the heat recovery tank of rectifying tower body top, heat recovery tank inside evenly arranged heat recovery pipe is provided, heat recovery pipe includes air inlet pipe and air outlet pipe, air inlet pipe is connected with first pipeline connector, first pipeline connector is connected with reboiler, air outlet pipe is connected with second pipeline connector, second pipeline connector is connected with reflux pipe, reflux pipe is connected with guide pipe, guide pipe top is connected with condenser, guide pipe bottom is connected with cooler, cooler is connected with liquid storage tank, rectifying tower body is fixedly arranged on base, rectifying tower body bottom is connected with reboiler bottom, reboiler top is connected with heat recovery tank one side, heat recovery tank top is connected with condenser one end, condenser other side is connected with vacuum pump;The utility model has the advantages of reducing energy consumption, improving energy utilization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of distillation column technology, specifically to a heat recovery structure for distillation columns. Background Technology

[0002] Distillation is a distillation method that uses reflux to separate liquid mixtures to achieve high purity. It is the most widely used liquid mixture separation operation in industry and is widely used in petroleum, chemical, light industry, food, metallurgy and other sectors. Some energy-saving coupled distillation columns have been developed at home and abroad: such as columns that couple reaction and distillation, columns that couple distillation with other separation processes (adsorption-distillation coupling, crystallization-distillation coupling, etc.); distillation-distillation coupling columns: heat-coupled distillation columns, internal heat-coupled distillation columns, and partitioned plate distillation columns.

[0003] Currently, distillation columns generate a large amount of heat during operation. Recovering and utilizing this excess heat can significantly reduce energy consumption and improve energy efficiency.

[0004] To address the aforementioned issues, we propose a heat recovery structure for distillation columns. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a heat recovery structure for distillation columns to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a heat recovery structure for a distillation column, comprising a base, a distillation column body disposed on the base, and a heat recovery tank disposed at the top of the distillation column body. Heat recovery pipes are uniformly arranged inside the heat recovery tank. Each heat recovery pipe includes an inlet pipe and an outlet pipe. The inlet pipe is connected to a first pipe connector, which is connected to a reboiler. The outlet pipe is connected to a second pipe connector, which is connected to a reflux pipe. The reflux pipe is connected to a conduit, the top of which is connected to a condenser, and the bottom of which is connected to a cooler. The cooler is connected to a liquid storage tank.

[0007] Preferably, the distillation column body is fixedly mounted on the base.

[0008] Preferably, the bottom of the distillation column is connected to the bottom of the reboiler, which heats part of the liquid in the column bottom to boiling point, causing it to vaporize, while providing a continuous and stable upward steam flow for the distillation process of the distillation column.

[0009] Preferably, the top of the reboiler is connected to one side of the heat recovery tank.

[0010] Preferably, the top of the heat recovery tank is connected to one end of the condenser.

[0011] Preferably, a vacuum pump is connected to the other side of the condenser, and the vacuum pump is connected to a condensate tank, which is used to circulate the condensate in the condensate tank within the condenser for cooling, thereby achieving the purpose of preliminary cooling and condensation of the distilled substance.

[0012] Preferably, four sets of pipes are provided on one side of the return pipe, and pneumatic valves are provided on the four sets of pipes on one side of the return pipe and at the confluence of the four sets of pipes to guide the condensate in the return pipe and the conduit.

[0013] Preferably, the four sets of pipes on the return pipe converge at one end and are connected to the conduit.

[0014] Preferably, a set of pipes at the top of the return pipe is connected to a second pipe connector on one side of the heat recovery tank.

[0015] Preferably, the three sets of pipes at the bottom of the vacuum pump are located on one side of the distillation column.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes a heat recovery tank located at the top of a distillation column to recover heat energy. The tank contains a heat recovery pipe. When steam enters the tank, a portion of the heat energy is recovered through the heat recovery pipe. This recovered heat, generated during the operation of the reboiler, flows into the heat recovery pipe via an inlet pipe. The outlet pipe of the heat recovery pipe connects to a second pipe connector, and the recovered heat energy is then returned to the distillation column via a reflux pipe to heat the raw material. This cyclic heating of the raw material within the distillation column allows for the recovery and reuse of the heat energy generated by the reboiler, significantly reducing energy consumption and improving energy efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall front view of the present invention; Figure 2 This is a schematic diagram of the heat recovery tank structure of this utility model; Figure 3 This is a schematic diagram of the heat recovery pipe structure of this utility model.

[0018] The diagram shows the following labels: 1. Base; 2. Distillation column body; 3. Reboiler; 4. Heat recovery tank; 5. Condenser; 6. Vacuum pump; 7. Conduit; 8. Reflux pipe; 9. Cooler; 10. Storage tank; 11. First pipe connector; 12. Heat recovery pipe; 13. Second pipe connector; 14. Inlet pipe; 15. Outlet pipe. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. Example 1

[0020] like Figure 1 As shown, this embodiment discloses a heat recovery structure for a distillation column, including a base 1, a distillation column body 2 disposed on the base 1, and a heat recovery tank 4 disposed on the top of the distillation column body 2. Heat recovery pipes 12 are uniformly arranged inside the heat recovery tank 4. The heat recovery pipes 12 include an inlet pipe 14 and an outlet pipe 15. The inlet pipe 14 is connected to a first pipe connector 11, which is connected to a reboiler 3. The outlet pipe 15 is connected to a second pipe connector 13, which is connected to a reflux pipe 8. The reflux pipe 8 is connected to a conduit 7, which is connected to a condenser 5 at the top and a cooler 9 at the bottom. The cooler 9 is connected to a storage tank 10.

[0021] In this embodiment, the distillation column 2 is fixedly mounted on the base 1. The bottom of the distillation column 2 is connected to the bottom of the reboiler 3. The top of the reboiler 3 is connected to the first pipe connector 11 on one side of the heat recovery tank 4. The top of the heat recovery tank 4 is connected to one end of the condenser 5. The other side of the condenser 5 is connected to a vacuum pump 6, and the vacuum pump 6 is connected to a condensate tank.

[0022] In this embodiment, one end of the cooler 9 is connected to the conduit 7 and the other end is connected to the liquid storage tank 10. A reflux pipe 8 is connected to the conduit 7. The end of the reflux pipe 8 away from the condenser 5 is connected to the distillation column body 2. The condenser 5 is connected to the cooler 9 through the conduit 7. At the same time, the temperature inside the condenser 5 is set higher than the temperature inside the cooler 9.

[0023] In this embodiment, four sets of pipes are provided on one side of the reflux pipe 8. Pneumatic valves are provided on the four sets of pipes on one side of the reflux pipe 8 and at the confluence section of the four sets of pipes to guide the condensate in the reflux pipe 8 and the conduit 7. The four sets of pipes on the reflux pipe 8 are connected to the conduit 7 after converging at one end. The set of pipes at the top of the reflux pipe 8 is connected to the second pipe connector 13 on one side of the heat recovery tank 4. The three sets of pipes at the bottom of the vacuum pump 6 are provided on one side of the distillation column body 2. Example 2

[0024] like Figure 1-3As shown, this embodiment discloses a heat recovery structure for a distillation column, including a base 1, a distillation column body 2 disposed on the base 1, and a heat recovery tank 4 disposed on the top of the distillation column body 2. Heat recovery pipes 12 are uniformly arranged inside the heat recovery tank 4. The heat recovery pipes 12 include an inlet pipe 14 and an outlet pipe 15. The inlet pipe 14 is connected to a first pipe connector 11, which is connected to a reboiler 3. The outlet pipe 15 is connected to a second pipe connector 13, which is connected to a reflux pipe 8. The reflux pipe 8 is connected to a conduit 7, which is connected to a condenser 5 at the top and a cooler 9 at the bottom. The cooler 9 is connected to a storage tank 10.

[0025] In this embodiment, heat recovery pipes 12 are uniformly arranged inside the heat recovery tank 4. Each heat recovery pipe 12 includes an inlet pipe 14 and an outlet pipe 15. The inlet pipes 14 arranged on the heat recovery pipes 12 converge and connect to a first pipe connector 11, which is connected to a reboiler 3 for recovering waste heat from the reboiler 3. The outlet pipes 15 arranged on the heat recovery pipes 12 converge and connect to a second pipe connector 13, which is connected to a reflux pipe 8. After the recovered waste heat steam is heated, it flows back to the distillation column 2 through the reflux pipe 8 and then flows back to the distillation column 2 again through the reflux pipe 8. During operation, the gaseous substance condensed by the condenser 5 is cooled and becomes a gas-liquid mixture. This gas-liquid mixture then flows back to the distillation column 2 through the reflux pipe 8 for further distillation and condensation.

[0026] Working principle: When in use, the liquid accumulated at the bottom of the distillation column 2 is first heated by the reboiler 3 to vaporize it; During this period, when steam enters the heat recovery tank 4, the waste heat generated by the reboiler 3 during operation flows into the heat recovery pipe 12 through the first pipe connector 11. Part of the heat energy is recovered through the heat recovery pipe 12, and the recovered heat energy is returned to the distillation column 2 through the return pipe 8 via the second pipe connector 13 connected to the heat recovery pipe 12, so as to reheat the liquid raw material in the distillation column 2 and realize the circulation heating of the raw material in the distillation column 2. Then, the evaporated liquid is sent to condenser 5 for condensation, so that the gaseous substance is initially cooled by condenser 5 and becomes a gas-liquid mixture, and continues to be sent through conduit 7; During this period, some gaseous substances pass through the reflux pipe 8 into the distillation column 2 for condensation again, while the other gas-liquid mixture is cooled again by the cooler 9. Finally, the raw material after distillation and separation is turned into a liquid substance, and after being cooled by cooler 9, it is transferred to storage tank 10, thereby achieving the purpose of separation.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heat recovery structure for a distillation column, characterized in that: The device includes a base (1), a distillation column (2) mounted on the base (1), and a heat recovery tank (4) mounted on the top of the distillation column (2). Heat recovery pipes (12) are evenly arranged inside the heat recovery tank (4). Each heat recovery pipe (12) includes an inlet pipe (14) and an outlet pipe (15). The inlet pipe (14) is connected to a first pipe connector (11), which is connected to a reboiler (3). The outlet pipe (15) is connected to a second pipe connector (13), which is connected to a reflux pipe (8). The reflux pipe (8) is connected to a conduit (7). The top of the conduit (7) is connected to a condenser (5), and the bottom of the conduit (7) is connected to a cooler (9). The cooler (9) is connected to a storage tank (10).

2. The heat recovery structure for a distillation column according to claim 1, characterized in that: The distillation column body (2) is fixedly mounted on the base (1).

3. The heat recovery structure for a distillation column according to claim 2, characterized in that: The bottom of the distillation column (2) is connected to the bottom of the reboiler (3).

4. The heat recovery structure for a distillation column according to claim 3, characterized in that: The top of the reboiler (3) is connected to the first pipe connector (11) on one side of the heat recovery tank (4).

5. The heat recovery structure for a distillation column according to claim 4, characterized in that: The top of the heat recovery tank (4) is connected to one end of the condenser (5).

6. The heat recovery structure for a distillation column according to claim 5, characterized in that: A vacuum pump (6) is connected to the other side of the condenser (5), and the vacuum pump (6) is connected to a condensate tank.

7. The heat recovery structure for a distillation column according to claim 1, characterized in that: Four sets of pipes are provided on one side of the return pipe (8), and pneumatic valves are provided on the four sets of pipes on one side of the return pipe (8) and at the confluence section of the four sets of pipes.

8. The heat recovery structure for a distillation column according to claim 7, characterized in that: The four sets of pipes on the return pipe (8) converge at one end and are connected to the conduit (7).

9. The heat recovery structure for a distillation column according to claim 7, characterized in that: A set of pipes at the top of the return pipe (8) is connected to the second pipe connector (13) on one side of the heat recovery tank (4).

10. The heat recovery structure for a distillation column according to claim 6, characterized in that: The three sets of pipes at the bottom of the vacuum pump (6) are located on one side of the distillation column (2).

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