Chloromethane rectification column with reflux device

Abstract

The utility model discloses a kind of methyl chloride rectifying column with reflux device, the utility model relates to methyl chloride technical field.This one has the methyl chloride rectifying column with reflux device, including base and the rectifying column of base inner side setting, reflux mechanism is set in base inner side;Reflux mechanism includes condensing part and reflux part;Condensing part includes condenser, and reflux part includes liquid storage tank and reflux pump;Base inner side surface is fixedly provided with fixed frame, the fixed frame outer wall is fixedly connected with condenser outer wall, technical effect is that reflux part is mainly responsible for the temporary storage of reflux liquid, monitoring and conveying, wherein liquid level synchronous sliding inside liquid storage tank floating plate and bottom airbag enhance buoyancy sensitivity, cooperate with floating plate outer wall pointer and liquid storage tank outer wall scale can realize liquid level real-time accurate monitoring, inner side surface transparent acrylic observation board can also directly observe reflux liquid state and find quality hidden danger in time, reach liquid level monitoring double security and control intuitiveness.

Description

Technical Field

[0001] This utility model relates to the field of chloromethane technology, specifically to a chloromethane distillation column with a reflux device. Background Technology

[0002] Existing chloromethane distillation units use canned motor pumps for top reflux. However, these pumps have insufficient net positive suction head (NPSH) and cannot operate normally during actual production. This prevents the establishment of top reflux, resulting in high chloromethane and non-methane total hydrocarbon content in the tail gas. This can easily trigger environmental accidents such as tail gas exceeding standards. Furthermore, the unstable operation of the reflux pump causes impurities such as carbon dioxide to dissolve in the chloromethane in the bottom of the distillation unit, adversely affecting the chloromethane product. Therefore, a chloromethane distillation column with a reflux device is proposed. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a chloromethane distillation column with a reflux device. This solves the problem that using a canned motor pump for top reflux results in insufficient net positive suction head (NPSH) for the pump, leading to malfunctions during actual production. This prevents the establishment of top reflux, resulting in high chloromethane and non-methane total hydrocarbon content in the tail gas, which can easily trigger environmental accidents such as exceeding tail gas standards. Furthermore, the unstable operation of the reflux pump allows impurities such as carbon dioxide to dissolve in the chloromethane in the bottom of the column, adversely affecting the chloromethane product.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: it includes a base and a distillation column disposed inside the base, wherein a reflux mechanism is disposed inside the base; The reflux mechanism includes a condensation section and a reflux section; The condensation section includes a condenser, and the reflux section includes a liquid storage tank and a reflux pump; A fixing frame is fixedly installed on the inner side of the base. The outer wall of the fixing frame is fixedly connected to the outer wall of the condenser. A gas supply pipe is fixedly installed through the gas inlet end of the condenser. The outer wall of the gas supply pipe is fixedly connected through the exhaust pipe of the distillation column. The inner side of the base is fixedly connected to the outer wall of the storage tank. A drain pipe is fixedly installed through the liquid outlet end of the condenser and the liquid inlet end of the storage tank. A reflux pump is fixedly connected to the outer wall of the inner side of the base. A connecting pipe is fixedly installed through the liquid outlet end of the reflux pump and the liquid outlet end of the storage tank. A reflux pipe is fixedly installed through the liquid outlet end of the reflux pump. The outer wall of the reflux pipe is fixedly inserted through the outer wall of the distillation column and extends into the interior of the distillation column.

[0005] Preferably, a float plate is slidably provided on the outer wall of the liquid storage tank, extending into the interior of the liquid storage tank. An air bladder is fixedly provided on the bottom surface of the float plate. The float plate slides synchronously with the liquid level, and the bottom air bladder enhances the buoyancy sensitivity.

[0006] Preferably, a scale is fixedly installed on the outer wall of the liquid storage tank, and a pointer is fixedly installed on the outer wall of the float plate. The pointer is set in correspondence with the scale, and the pointer and the scale on the outer wall of the liquid storage tank can realize real-time and accurate monitoring of the liquid level.

[0007] Preferably, an observation plate is fixedly installed on the inner side of the liquid storage tank. The observation plate is made of transparent acrylic sheet. The transparent acrylic observation plate can also directly observe the state of the reflux liquid and detect potential quality problems in a timely manner.

[0008] Preferably, the reflux pump 38 is a turbo pump, which can improve the net positive suction head (NPSH).

[0009] This invention provides a chloromethane distillation column with a reflux device. It has the following beneficial effects: (i) The chloromethane distillation column with a reflux device is mainly responsible for the temporary storage, monitoring and transportation of reflux liquid. The float inside the storage tank slides synchronously with the liquid level and the bottom air bladder enhances the buoyancy sensitivity. With the pointer on the outer wall of the float and the scale on the outer wall of the storage tank, the liquid level can be monitored in real time and accurately. The transparent acrylic observation plate on the inner side can also directly observe the state of the reflux liquid and detect potential quality problems in time, achieving dual protection of liquid level monitoring and intuitive control. The reflux pump is a turbine pump, which has stable flow and head to meet the requirements. It can uniformly and continuously transport the reflux liquid back to the distillation column to ensure continuous reflux circulation and improve the purity of chloromethane separation. The vortex pump can improve the net positive suction head (NPSH).

[0010] (ii) The chloromethane distillation column with a reflux device has a condenser as the core of the condensation section, which is equipped with a fixed frame, gas delivery pipe, liquid discharge pipe and other components. Through stable condensation, the chloromethane mixed vapor discharged from the distillation column can be quickly converted into liquid reflux liquid, ensuring the initial quality of the reflux liquid from the source and laying the foundation for the efficient development of subsequent distillation cycle. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the reflux mechanism of this utility model; Figure 3 This utility model Figure 2 Enlarged structural diagram of area A in the middle.

[0012] In the diagram: 1. Base; 2. Distillation column; 3. Reflux mechanism; 31. Gas delivery pipe; 32. Fixing frame; 33. Condenser; 34. Drain pipe; 35. Observation plate; 36. Air bladder; 37. Connecting pipe; 38. Reflux pump; 39. Reflux pipe; 310. Float; 311. Pointer; 312. Ruler; 313. Storage tank. Detailed Implementation

[0013] 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.

[0014] Please see Figure 1-3 The present invention provides a technical solution: including a base 1 and a distillation column 2 disposed inside the base 1, and a reflux mechanism 3 disposed inside the base 1; The reflux mechanism 3 includes a condensation section and a reflux section; The condensation section includes a condenser 33, and the reflux section includes a liquid storage tank 313 and a reflux pump 38; A fixing bracket 32 ​​is fixedly installed on the inner side of the base 1. The outer wall of the fixing bracket 32 ​​is fixedly connected to the outer wall of the condenser 33. A gas supply pipe 31 is fixedly installed through the gas inlet end of the condenser 33. The outer wall of the gas supply pipe 31 is fixedly connected through the exhaust pipe of the distillation column 2. The inner side of the base 1 is fixedly connected to the outer wall of the liquid storage tank 313. A drain pipe 34 is fixedly installed through the liquid outlet end of the condenser 33 and the liquid inlet end of the liquid storage tank 313. A reflux pump 38 is fixedly connected to the outer wall of the inner side of the base 1. A connecting pipe 37 is fixedly installed through the liquid outlet end of the reflux pump 38 and the liquid outlet end of the liquid storage tank 313. A reflux pipe 39 is fixedly installed at the liquid end, and the outer wall of the reflux pipe 39 is fixedly installed through the outer wall of the distillation column 2 and extends into the interior of the distillation column 2. A float plate 310 is slidably installed on the outer wall of the storage tank 313 and extends into the interior of the storage tank 313. An air bladder 36 is fixedly installed on the bottom surface of the float plate 310. A scale 312 is fixedly installed on the outer wall of the storage tank 313. A pointer 311 is fixedly installed on the outer wall of the float plate 310. The pointer 311 is set to correspond with the scale 312. An observation plate 35 is fixedly installed on the inner side of the storage tank 313. The observation plate 35 is made of transparent acrylic plate. The reflux pump 38 is a turbine pump.

[0015] During use, in the distillation process, the chloromethane mixed vapor rises in the distillation column 2, enters the gas delivery pipe 31 through the exhaust pipe of the distillation column 2, and the vapor enters the condenser 33 through the gas delivery pipe 31. The condenser 33 condenses the incoming chloromethane mixed vapor, converting the vapor into liquid chloromethane reflux liquid. The condensed reflux liquid enters the drain pipe 34 through the drain end of the condenser 33. The drain pipe 34 is fixedly connected to the inlet end of the storage tank 313. Therefore, the reflux liquid flows into the storage tank 313 for temporary storage through the drain pipe 34. Inside the storage tank 313, as the reflux liquid level rises, the float 310 slides upward along the inner wall of the storage tank 313 due to buoyancy. The air bladder 36 on the bottom surface of the float 310 enhances the buoyancy effect, making the sliding of the float 310 more sensitive. At the same time, the pointer 311 on the outer wall of the float 310 moves with the float 310. The operator can visually understand the reflux liquid level in the storage tank 313 by observing the corresponding position of the pointer 311 and the scale 312 on the outer wall of the storage tank 313. In addition, the transparent acrylic observation plate 35 on the inner side of the storage tank 313 also allows the operator to directly observe the internal reflux liquid situation. When it is necessary to send the reflux liquid back to the distillation column 2, the reflux pump 38 is started. The inlet end of the reflux pump 38 is fixedly connected to the outlet end of the storage tank 313 through the connecting pipe 37. The reflux liquid in the storage tank 313 can be drawn out and then transported through the reflux pipe 39 fixedly connected to the outlet end of the reflux pump 38. The reflux liquid re-enters the distillation column 2 through the reflux pipe 39 to participate in a new round of distillation process, thereby improving the distillation purity and efficiency of chloromethane.

[0016] 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 said element.

[0017] 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 chloromethane distillation column with a reflux device, comprising a base (1) and a distillation column (2) disposed inside the base (1), characterized in that: A reflux mechanism (3) is provided on the inner side of the base (1); The reflux mechanism (3) includes a condensation section and a reflux section; The condensation section includes a condenser (33), and the reflux section includes a liquid storage tank (313) and a reflux pump (38). A fixing frame (32) is fixedly installed on the inner side of the base (1). The outer wall of the fixing frame (32) is fixedly connected to the outer wall of the condenser (33). A gas supply pipe (31) is fixedly installed through the gas inlet end of the condenser (33). The outer wall of the gas supply pipe (31) is fixedly connected through the exhaust pipe of the distillation column (2). The inner side of the base (1) is fixedly connected to the outer wall of the liquid storage tank (313). The liquid outlet end of the condenser (33) is connected to the liquid storage tank (313). 3) A drain pipe (34) is fixedly connected between the liquid inlet and the liquid outlet. The base (1) has a reflux pump (38) fixedly connected to the outer wall. A connecting pipe (37) is fixedly connected between the liquid inlet of the reflux pump (38) and the liquid outlet of the storage tank (313). A reflux pipe (39) is fixedly connected to the liquid outlet of the reflux pump (38). The outer wall of the reflux pipe (39) is fixedly connected through the outer wall of the distillation column (2) and extends into the interior of the distillation column (2).

2. A chloromethane distillation column with a reflux device according to claim 1, characterized in that: A float plate (310) is slidably provided on the outer wall of the liquid storage tank (313) and extends into the interior of the liquid storage tank (313). An air bladder (36) is fixedly provided on the bottom surface of the float plate (310).

3. A chloromethane distillation column with a reflux device according to claim 2, characterized in that: A scale (312) is fixedly installed on the outer wall of the liquid storage tank (313), and a pointer (311) is fixedly installed on the outer wall of the float plate (310). The pointer (311) is set in correspondence with the scale (312).

4. A chloromethane distillation column with a reflux device according to claim 1, characterized in that: An observation plate (35) is fixedly installed on the inner side of the liquid storage tank (313), and the observation plate (35) is made of transparent acrylic sheet.

5. A chloromethane distillation column with a reflux device according to claim 1, characterized in that: The reflux pump (38) is a turbine pump.

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