An acetone condenser

Abstract

The utility model relates to condenser technical field especially is concerned with a kind of acetone condenser, including condensing shell and cooling liquid pipeline, condensing shell top surface is equipped with the acetone steam inlet pipe for supplying acetone, condensing shell bottom surface is equipped with the acetone liquid outlet pipe for supplying acetone liquid outflow;Cooling liquid pipeline includes cooling liquid inlet pipe, cooling liquid outlet pipe, shunt main pipe, several cooling pipes, several connecting pipes and several shunt branch pipes, cooling pipe transversely passes through condensing shell, shunt main pipe and cooling liquid inlet pipe are connected, shunt branch pipe one end and shunt main pipe are connected, other end and the connecting pipe of the side where cooling liquid inlet pipe is located are connected, shunt branch pipe diameter is less than cooling pipe diameter, multilayer cooling pipe cooperates fin and greatly increases heat exchange area, improves condensing efficiency in limited space;Shunt branch pipe ensures that cooling liquid is evenly distributed to each layer pipeline, avoids local overheating.

Description

Technical Field

[0001] This utility model relates to the field of condenser technology, and in particular to an acetone condenser. Background Technology

[0002] In the production of waterborne polyurethane, acetone is used extensively as an important solvent. Due to its low boiling point (56°C), acetone vapor suffers from incomplete condensation and low heat exchange efficiency during condensation. Traditional condensers often require increased volume to improve efficiency, but space constraints (especially floor height limitations) make it difficult to deploy large equipment, resulting in high acetone residue and low recovery rates during production. In existing technologies, condensers mostly use single-pass cooling pipes, leading to short contact time between vapor and the cooling medium, and the condensate easily adheres to the heat exchange surface, forming a liquid film that further hinders heat transfer. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to overcome the problem that the existing condensers mostly use single-pass cooling pipes, the contact time between steam and cooling medium is short, and the condensate is easy to adhere to the heat exchange surface to form a liquid film, which further hinders heat transfer, an acetone condenser is provided.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an acetone condenser, including a condenser shell and a coolant pipe, an acetone inlet pipe for acetone vapor to enter is installed on the top surface of the condenser shell, and an acetone outlet pipe for acetone liquid to flow out is installed on the bottom surface of the condenser shell.

[0005] The coolant piping system includes a coolant inlet pipe, a coolant outlet pipe, a main distribution pipe, several cooling pipes, several connecting pipes, and several branch pipes. The cooling pipes pass horizontally through the condenser shell and are spaced vertically. One end of the lowest cooling pipe connects to the outlet end of the coolant inlet pipe, and one end of the highest cooling pipe connects to the inlet end of the coolant outlet pipe. The ends of the remaining two adjacent cooling pipes are connected by connecting pipes. Fins are arranged on the cooling pipes. The main distribution pipe connects to the coolant inlet pipe, and one end of the branch pipe connects to the main distribution pipe, while the other end connects to the connecting pipe on the side where the coolant inlet pipe is located. The diameter of the branch pipes is smaller than the diameter of the cooling pipes. The multi-layer cooling pipes combined with fins significantly increase the heat exchange area, improving condensation efficiency within a limited space. The branch pipes ensure that the coolant is evenly distributed to each layer of pipes, avoiding localized overheating.

[0006] To address the issue of insufficient condensation caused by an excessively short steam path, the system further includes a diagonal arrangement of the acetone inlet pipe and the acetone outlet pipe.

[0007] To address the issue of condensate lingering on the fin surface, forming an insulating layer and reducing heat transfer efficiency, a liquid blowing and circulation assembly is further included. This assembly comprises a fan, an inlet duct, and an outlet duct. The fan and the inlet duct are connected, the outlet duct is connected to the inner cavity of the condenser housing, and the outlet duct is connected to the inner cavity of the condenser housing. The fan is used to blow the acetone condensate on the fins and cooling pipes down.

[0008] To address the issue of solvent waste caused by the direct emission of acetone vapor carried by the purge airflow, a liquid circulation assembly is further included, comprising a return pipe, one end of which is connected to the output end of the outlet pipe, and the other end of which is connected to the inlet pipe.

[0009] To address the issue of steam being discharged before fully contacting the condenser surface due to airflow short-circuiting, a liquid blowing circulation assembly is further included, comprising a baffle plate. The baffle plate controls the direction of steam flow, encloses the inlet end of the outlet duct, and has a "C"-shaped structure. The baffle plate is fixedly connected to the condenser shell, and there is a flow gap between the end of the baffle plate near the right wall of the condenser shell and the top surface of the condenser shell.

[0010] To address the issue of insufficient coolant flow rate reducing the convective heat transfer coefficient within the pipe, a Venturi tube is further installed at the inlet end of the coolant inlet pipe.

[0011] The beneficial effects of this utility model are: the acetone condenser provided by this utility model has a multi-layer cooling tube with fins that greatly increases the heat exchange area and improves the condensation efficiency in a limited space; the branch pipes ensure that the coolant is evenly distributed to each layer of pipes and avoids local overheating. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] In the diagram: 1. Condenser shell, 11. Acetone inlet pipe, 12. Acetone outlet pipe, 2. Coolant pipe, 21. Coolant inlet pipe, 22. Coolant outlet pipe, 23. Main branch pipe, 24. Cooling pipe, 25. Connecting pipe, 26. Branch branch pipe, 27. Fin, 28. Venturi tube, 3. Fluid circulation assembly, 31. Fan, 32. Air inlet pipe, 33. Air outlet pipe, 34. Return pipe, 35. Baffle plate. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0016] like Figure 1 This is a schematic diagram of the structure of the present invention. An acetone condenser includes a condenser shell 1 and a coolant pipe 2. An acetone inlet pipe 11 for acetone vapor to enter is installed on the top surface of the condenser shell 1, and an acetone outlet pipe 12 for acetone liquid to flow out is installed on the bottom surface of the condenser shell 1.

[0017] like Figure 1 As shown, the coolant pipeline 2 includes a coolant inlet pipe 21, a coolant outlet pipe 22, a main branch pipe 23, several cooling pipes 24, several connecting pipes 25, and several branch pipes 26. The cooling pipes 24 pass laterally through the condenser shell 1 and are distributed vertically at intervals. One end of the lowermost cooling pipe 24 is connected to the output end of the coolant inlet pipe 21, and one end of the uppermost cooling pipe 24 is connected to the input end of the coolant outlet pipe 22. The ends of the other two adjacent cooling pipes 24 are connected on the same side. The cooling pipes 24 are connected by a connecting pipe 25. The cooling pipes 24 are equipped with fins 27. The main distribution pipe 23 is connected to the coolant inlet pipe 21. One end of the branch pipe 26 is connected to the main distribution pipe 23, and the other end is connected to the connecting pipe 25 on the side where the coolant inlet pipe 21 is located. The diameter of the branch pipe 26 is smaller than that of the cooling pipe 24. The multi-layer cooling pipes 24, together with the fins 27, greatly increase the heat exchange area and improve the condensation efficiency in a limited space. The branch pipe 26 ensures that the coolant is evenly distributed to each layer of pipes and avoids local overheating.

[0018] like Figure 1 As shown, the acetone inlet pipe 11 and the acetone outlet pipe 12 are arranged diagonally. The diagonal arrangement of the acetone inlet and outlet extends the steam path and improves the condensation rate.

[0019] like Figure 1 As shown, the liquid blowing circulation assembly 3 includes a fan 31, an air inlet pipe 32, and an air outlet pipe 33. The fan 31 is connected to the input end of the air inlet pipe 32, and the output end of the air inlet pipe 31 is connected to the inner cavity of the condenser shell 1. The input end of the air outlet pipe 33 is connected to the inner cavity of the condenser shell 1. The fan 31 is used to blow the acetone condensate on the fins 27 and the cooling pipe 24 down. The liquid blowing circulation assembly 3 accelerates the dripping of condensate by forcing airflow to sweep the surface of the fins 27 and the cooling pipe 24, reduces the liquid film thermal resistance, and improves the heat transfer efficiency by more than 15%.

[0020] like Figure 1 As shown, the liquid circulation assembly 3 includes a return pipe 34. One end of the return pipe 34 is connected to the output end of the air outlet pipe 33, and the other end is connected to the air inlet pipe 32. The return pipe 34 re-introduces the airflow containing acetone vapor into the condensation chamber for circulation treatment, thereby reducing solvent loss and lowering production costs.

[0021] like Figure 1As shown, the liquid circulation assembly 3 includes a baffle plate 35, which is used to control the direction of steam flow. The baffle plate 35 surrounds the input end of the air outlet duct 33. The baffle plate 35 has a "C" shaped structure. The baffle plate 35 is fixedly connected to the condenser shell 1. There is a flow gap between the end of the baffle plate 35 near the right wall of the condenser shell 1 and the top surface of the condenser shell 1. The baffle plate 35 forms a one-sided open flow guide channel, which extends the airflow path and guides the steam flow to the condensation area to avoid short circuit.

[0022] like Figure 1 As shown, a Venturi tube 28 is installed on the inlet end of the coolant inlet pipe 21. The Venturi tube 28 accelerates the coolant flow rate and enhances turbulent heat transfer.

[0023] Cooling process: Acetone vapor enters the condenser shell 1 from the steam inlet pipe 11 and comes into contact with the finned cooling pipe 24. The heat of the vapor is conducted through the fins 27 to the coolant (such as cold water) flowing in the cooling pipe 24. After condensing into a liquid state, it is discharged from the liquid outlet pipe 12. The coolant enters from the liquid inlet pipe 21 and is distributed to each layer connection 25 through the main distribution pipe 23 and the branch distribution pipe 26. After flowing from bottom to top through the multiple layers of cooling pipes 24, it is discharged from the liquid outlet pipe 22. The fan 31 drives the airflow to enter the shell from the air inlet pipe 32, sweeping the surface of the fins 27 and the cooling pipe 24, causing the attached droplets to fall off. The airflow carries the residual vapor and is guided by the baffle plate 35 to the air outlet pipe 33. Part of it re-enters the circulating condenser through the return pipe 34.

[0024] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An acetone condenser, characterized in that, It includes a condenser shell (1) and a coolant pipe (2). The top surface of the condenser shell (1) is equipped with an acetone inlet pipe (11) for acetone vapor to enter, and the bottom surface of the condenser shell (1) is equipped with an acetone outlet pipe (12) for acetone liquid to flow out. The coolant pipeline (2) includes a coolant inlet pipe (21), a coolant outlet pipe (22), a main branch pipe (23), several cooling pipes (24), several connecting pipes (25), and several branch pipes (26). The cooling pipes (24) pass through the condenser shell (1) laterally, and the cooling pipes (24) are distributed vertically at intervals. One end of the lowermost cooling pipe (24) is connected to the output end of the coolant inlet pipe (21), and one end of the uppermost cooling pipe (24) is connected to the coolant outlet pipe (21). The inlet end of the liquid outlet pipe (22) is connected, and the ends of the other two adjacent cooling pipes (24) on the same side are connected by a connecting pipe (25). The cooling pipe (24) is provided with fins (27). The main branch pipe (23) is connected to the coolant inlet pipe (21). One end of the branch pipe (26) is connected to the main branch pipe (23), and the other end is connected to the connecting pipe (25) on the side where the coolant inlet pipe (21) is located. The diameter of the branch pipe (26) is smaller than the diameter of the cooling pipe (24).

2. The acetone condenser as described in claim 1, characterized in that: The acetone inlet pipe (11) and acetone outlet pipe (12) are arranged diagonally.

3. An acetone condenser as described in claim 1, characterized in that: The acetone condenser includes a liquid circulation assembly (3), which includes a fan (31), an air inlet pipe (32), and an air outlet pipe (33). The fan (31) is connected to the input end of the air inlet pipe (31), the output end of the air inlet pipe (31) is connected to the inner cavity of the condenser housing (1), and the input end of the air outlet pipe (33) is connected to the inner cavity of the condenser housing (1). The fan (31) is used to blow the acetone condensate on the fins (27) and cooling pipes (24) down.

4. An acetone condenser as described in claim 3, characterized in that: The liquid circulation assembly (3) includes a return pipe (34), one end of which is connected to the output end of the air outlet pipe (33), and the other end is connected to the air inlet pipe (32).

5. An acetone condenser as described in claim 4, characterized in that: The liquid circulation assembly (3) includes a baffle plate (35) for controlling the direction of steam flow. The baffle plate (35) surrounds the input end of the air outlet pipe (33). The baffle plate (35) has a "C" shaped structure. The baffle plate (35) is fixedly connected to the condenser shell (1). There is a flow gap between the end of the baffle plate (35) near the right wall of the condenser shell (1) and the top surface of the condenser shell (1).

6. An acetone condenser as described in claim 1, characterized in that: A venturi tube (28) is installed on the inlet end of the coolant inlet pipe (21).

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