Cooling medium replaceable reaction kettle heat exchanger

Abstract

The utility model discloses a cooling medium replaceable's reaction kettle heat exchanger, and the utility model relates to heat exchanger technical field, this cooling medium replaceable's reaction kettle heat exchanger, including bottom plate, the bottom plate top is provided with heat exchange mechanism and circulation mechanism, heat exchange mechanism includes heat exchange portion and separation portion, heat exchange portion includes heat exchange casing and a plurality of heat exchange pipes, and separation portion includes separation tank and spiral baffle, heat exchange casing bottom surface and bottom plate top surface fixed connection, technical effect is that heat exchange mechanism realizes heat exchange, gas -liquid separation, and heat exchange portion adopts the structure that double fixed tank is cooperated with multiple heat exchange pipes, can make cooling medium even enter each heat exchange pipe after fixed tank accumulation type partial flow, and the vaporized methanol of waiting cooling enters heat exchange casing from the upper feed pipe and evenly covers the outer wall of heat exchange pipe from top to bottom, forms efficient reverse convection heat exchange, ensures that vaporized methanol is cooled evenly and completely to guarantee product purity.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to a reactor heat exchanger with replaceable cooling medium. Background Technology

[0002] Chloromethane is an important basic organic chemical raw material, widely used in the production of silicone resins, methyl tert-butyl ethers, pesticide intermediates, etc. Its production process must be selected based on raw material costs, product purity, and environmental requirements. Currently, the mainstream industrial method is the "methanol chlorination process."

[0003] In the "methanol chlorination process", the heat exchange process is one of the core unit operations. Its essence is to realize the heat transfer between the "material requiring temperature control" and the "heat transfer medium" through the heat exchanger, and finally achieve the process goal of "heating, cooling, and constant temperature" or "phase change".

[0004] Existing heat exchangers discharge vaporized methanol containing liquid methanol during operation. If liquid methanol is entrained in the vaporized methanol, it will not only cause material waste, but may also lead to liquid accumulation in subsequent pipelines, equipment corrosion, and even safety hazards in the gas phase conveying system. Therefore, a reactor heat exchanger with replaceable cooling medium is proposed. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a reactor heat exchanger with a replaceable cooling medium, which solves the problem that if gaseous methanol is entrained with liquid methanol, it will not only cause material waste, but may also lead to liquid accumulation in subsequent pipelines, equipment corrosion, and even safety hazards in the gas phase conveying system.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: it includes a base plate, and a heat exchange mechanism and a circulation mechanism are arranged on the top of the base plate;

[0009] The heat exchange mechanism includes a heat exchange section and a separation section;

[0010] The heat exchange section includes a heat exchange shell and multiple heat exchange tubes, and the separation section includes a separation tank and a spiral baffle.

[0011] The bottom surface of the heat exchange shell is fixedly connected to the top surface of the base plate. A discharge pipe and a feed pipe are fixedly installed through the outer wall of the heat exchange shell. The feed pipe is located above the discharge pipe. The top surface of the base plate is fixedly connected to the bottom surface of the separator. A connecting pipe is fixedly installed through the outer wall of the discharge pipe of the base plate. The outer wall of the connecting pipe extends through the outer wall of the separator to the inside of the separator. An air outlet pipe is fixedly installed through the top surface of the separator and extends to the inside of the separator. A liquid outlet pipe is fixedly installed through the outer wall of the separator and extends to the inside of the separator. A drain pipe and a liquid inlet pipe are fixedly installed through the outer wall of the heat exchange shell.

[0012] Preferably, the circulation mechanism includes a storage tank, the bottom surface of which is fixedly connected to the top surface of a base plate. A liquid pump is fixedly installed on the top surface of the base plate. The inlet end of the liquid pump extends through the outer wall of the storage tank and into the interior of the storage tank. An inflow pipe is fixedly connected between the liquid pump and the inlet pipe. An outlet pipe is fixedly connected through the outer wall of the outlet pipe. The bottom surface of the outlet pipe extends through the top surface of the storage tank and into the interior of the storage tank. The cooling medium flowing in the storage tank, the inflow pipe, the outlet pipe, and the multiple heat exchange pipes is methanol.

[0013] Preferably, two fixed tanks are fixedly installed on the inner side of the heat exchange shell, and the outer walls of the plurality of heat exchange tubes are respectively fixedly installed through the two fixed tanks and extend to the inner side of the two fixed tanks. The drain pipe and the inlet pipe are respectively fixedly installed through the outer walls of the two fixed tanks and extend to the inside of the two fixed tanks.

[0014] Preferably, the outer wall of the spiral baffle is fixedly connected to the inner side of the separator, and the spiral baffle is located above the connecting pipe.

[0015] Preferably, a liquid exchange pipe is fixedly installed through the outer wall of the storage tank and extends into the interior of the storage tank, and a valve is fixedly installed through the outer wall of the liquid exchange pipe.

[0016] (III) Beneficial Effects

[0017] This invention provides a heat exchanger for a reactor with a replaceable cooling medium. It offers the following advantages:

[0018] (i) This heat exchanger for a reactor with replaceable cooling medium achieves heat exchange and gas-liquid separation. The heat exchange section adopts a structure with two fixed tanks and multiple heat exchange tubes, which allows the cooling medium to be evenly distributed into each heat exchange tube after being accumulated and diverted by the fixed tanks. At the same time, the vaporized methanol to be cooled enters the heat exchange shell from the upper feed pipe and evenly covers the outer wall of the heat exchange tube from top to bottom, forming a highly efficient counter-convective heat exchange, ensuring that the vaporized methanol is cooled evenly and thoroughly to ensure product purity. The separation section directly integrates a separation tank with a spiral baffle. The cooled gas-liquid mixture can directly enter the separation tank through the connecting pipe, and gas-liquid separation is achieved by gravity and the spiral baffle, effectively reducing the entrainment of liquid methanol during methanol vaporization.

[0019] (II) This heat exchanger for a reactor with replaceable cooling medium allows for liquid replacement without disassembly via a liquid exchange pipe with a valve on the outer wall of the storage tank. Simply shutting off the liquid pump and opening / closing the valves are sufficient to discharge the old medium and inject the new medium. This design can quickly adapt to the adjustment requirements of different reaction conditions for the type and concentration of cooling medium, greatly improving production flexibility. At the same time, the closed-loop design of "storage tank → liquid pump → inflow pipe → liquid inlet pipe → heat exchange pipe → liquid outlet pipe → outflow pipe → storage tank" can avoid the volatilization loss of volatile media such as methanol, and the medium can be repeatedly recycled, reducing the amount of waste medium to be disposed of and lowering procurement and environmental protection costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the heat exchange mechanism of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the heat exchange mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the circulation mechanism of this utility model.

[0024] In the diagram: 1. Base plate; 2. Heat exchange mechanism; 21. Heat exchange shell; 22. Connecting pipe; 23. Gas outlet pipe; 24. Separator tank; 25. Liquid outlet pipe; 26. Material outlet pipe; 27. Fixed tank; 28. Heat exchange tube; 29. ​​Feed pipe; 210. Liquid drain pipe; 211. Spiral baffle; 212. Liquid inlet pipe; 3. Circulation mechanism; 31. Storage tank; 32. Outflow pipe; 33. Inflow pipe; 34. Liquid pump; 35. Liquid exchange pipe. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 The present invention provides a technical solution: including a base plate 1, and a heat exchange mechanism 2 and a circulation mechanism 3 are arranged above the base plate 1;

[0027] The heat exchange mechanism 2 includes a heat exchange section and a separation section;

[0028] The heat exchange section includes a heat exchange shell 21 and a plurality of heat exchange tubes 28, and the separation section includes a separation tank 24 and a spiral baffle 211;

[0029] The bottom surface of the heat exchange shell 21 is fixedly connected to the top surface of the bottom plate 1. A discharge pipe 26 and a feed pipe 29 are fixedly installed through the outer wall of the heat exchange shell 21, with the feed pipe 29 located above the discharge pipe 26. The top surface of the bottom plate 1 is fixedly connected to the bottom surface of the separator 24. A connecting pipe 22 is fixedly installed through the outer wall of the discharge pipe 26 of the bottom plate 1. The outer wall of the connecting pipe 22 penetrates the outer wall of the separator 24 and extends into the interior of the separator 24. A gas outlet pipe 23 is fixedly installed through the top surface of the separator 24 and extends into the interior of the separator 24. A liquid outlet pipe 25 is fixedly installed through the outer wall of the separator 24 and extends into the separator 24. Inside, a drain pipe 210 and an inlet pipe 212 are fixedly installed through the outer wall of the heat exchange shell 21. Two fixed tanks 27 are fixedly installed on the inner side of the heat exchange shell 21. Multiple heat exchange tubes 28 are fixedly installed through the outer walls of the two fixed tanks 27 and extend to the inner side of the two fixed tanks 27. One end face of the drain pipe 210 and the inlet pipe 212 located on the inner side of the heat exchange shell 21 is fixedly installed through the outer walls of the two fixed tanks 27 and extends to the inside of the two fixed tanks 27. The outer wall of the spiral baffle 211 is fixedly connected to the inner side of the separation tank 24. The spiral baffle 211 is located above the connecting pipe 22.

[0030] The circulation mechanism 3 includes a storage tank 31, the bottom surface of which is fixedly connected to the top surface of the base plate 1. A liquid pump 34 is fixedly installed on the top surface of the base plate 1. The inlet end of the liquid pump 34 extends through the outer wall of the storage tank 31 and into the storage tank 31. An inflow pipe 33 is fixedly connected between the liquid pump 34 and the inlet pipe 212. An outlet pipe 32 is fixedly connected through the outer wall of the outlet pipe 210. The bottom surface of the outlet pipe 32 extends through the top surface of the storage tank 31 and into the storage tank 31. A liquid exchange pipe 35 extends through the outer wall of the storage tank 31 and into the storage tank 31. A valve is fixedly connected through the outer wall of the liquid exchange pipe 35.

[0031] In use, the vaporized methanol to be cooled first enters the interior of the heat exchange shell 21 through the feed pipe 29 on the outer wall of the heat exchange shell 21, evenly covering the outer walls of multiple heat exchange tubes 28. At the same time, the methanol in the storage tank 31 of the circulation mechanism 3 is driven by the liquid pump 34 and enters the fixed tank 27 inside the heat exchange shell 21 through the inflow pipe 33 and the liquid inlet pipe 212. It is distributed to the interior of each heat exchange tube 28 in an accumulation manner, forming heat exchange with the vaporized methanol outside the tube. After the vaporized methanol is cooled, it enters the separation tank 24 through the discharge pipe 26 and the connecting pipe 22. Under the action of the spiral baffle 211, gas-liquid separation is achieved. The gaseous component is discharged from the gas outlet pipe 23 and the liquid component is discharged from the liquid outlet pipe 25. The methanol that has absorbed heat is collected in another fixed tank 27 and then flows back to the storage tank 31 through the liquid outlet pipe 210 and the outflow pipe 32 to form a closed loop circulation.

[0032] When the cooling medium needs to be replaced, turn off the liquid pump 34, open the valve of the liquid replacement pipe 35 to discharge the old methanol, inject new methanol, close the valve and restart the liquid pump 34 to resume operation, and finally realize the efficient cooling of vaporized methanol and the flexible circulation and replacement of the cooling medium methanol.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat exchanger for a reactor with replaceable cooling medium, comprising a base plate (1), characterized in that: A heat exchange mechanism (2) and a circulation mechanism (3) are provided above the base plate (1); The heat exchange mechanism (2) includes a heat exchange section and a separation section; The heat exchange section includes a heat exchange shell (21) and multiple heat exchange tubes (28), and the separation section includes a separation tank (24) and a spiral baffle (211); The bottom surface of the heat exchange shell (21) is fixedly connected to the top surface of the bottom plate (1). The outer wall of the heat exchange shell (21) is fixedly provided with a discharge pipe (26) and a feed pipe (29). The feed pipe (29) is located above the discharge pipe (26). The top surface of the bottom plate (1) is fixedly connected to the bottom surface of the separator (24). The outer wall of the discharge pipe (26) of the bottom plate (1) is fixedly provided with a connecting pipe (22). The outer wall of the connecting pipe (22) extends through the outer wall of the separator (24) and into the separator (24). The top surface of the separator (24) is fixedly provided with a gas outlet pipe (23) extending into the separator (24). The outer wall of the separator (24) is fixedly provided with a liquid outlet pipe (25) extending into the separator (24). The outer wall of the heat exchange shell (21) is fixedly provided with a drain pipe (210) and a feed pipe (212).

2. The heat exchanger for a reactor with replaceable cooling medium according to claim 1, characterized in that: The circulation mechanism (3) includes a storage tank (31), the bottom surface of the storage tank (31) is fixedly connected to the top surface of the base plate (1), a liquid pump (34) is fixedly installed on the top surface of the base plate (1), the liquid pump (34) has its inlet end fixedly penetrates the outer wall of the storage tank (31) and extends into the storage tank (31), an inflow pipe (33) is fixedly connected between the liquid pump (34) and the inlet pipe (212), an outlet pipe (32) is fixedly connected to the outer wall of the outlet pipe (210), and the bottom surface of the outlet pipe (32) is fixedly penetrates the top surface of the storage tank (31) and extends into the storage tank (31).

3. A heat exchanger for a reactor with replaceable cooling medium according to claim 1, characterized in that: Two fixed tanks (27) are fixedly installed on the inner side of the heat exchange shell (21). The outer walls of multiple heat exchange tubes (28) are fixedly inserted through the two fixed tanks (27) and extend to the inner side of the two fixed tanks (27). The drain pipe (210) and the inlet pipe (212) are fixedly inserted through the outer walls of the two fixed tanks (27) and extend to the inside of the two fixed tanks (27) at one end face located on the inner side of the heat exchange shell (21).

4. A reactor heat exchanger with replaceable cooling medium according to claim 1, characterized in that: The outer wall of the spiral baffle (211) is fixedly connected to the inner side of the separator (24), and the spiral baffle (211) is located above the connecting pipe (22).

5. A heat exchanger for a reactor with replaceable cooling medium according to claim 2, characterized in that: A liquid exchange pipe (35) is fixedly installed through the outer wall of the storage tank (31) and extends into the storage tank (31). A valve is fixedly installed through the outer wall of the liquid exchange pipe (35).

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