Mixed gas separation treatment device

Abstract

The utility model belongs to the technical field of chemical production, and particularly relates to a mixed gas separation treatment device which comprises a safety tank, a heat exchanger arranged between the top of the safety tank and an exhaust port of a vacuum unit, a liquid level sensor installed on the safety tank, and a discharge port arranged at the bottom of the safety tank and connected with a layered interface detection assembly. The layered interface detection assembly comprises a glass test tube, the upper end and the lower end of the glass test tube are connected with a discharge port and a connecting flange respectively, the outer side of the glass test tube is covered with two clamping plates, the two clamping plates are provided with a photoelectric sensor transmitting end and a photoelectric sensor receiving end respectively, the connecting flange is communicated with a water removal assembly, and the water removal assembly is connected with an electric control valve. The electric control valve, the liquid level sensor and the receiving end of the photoelectric sensor are electrically connected with a PLC. The layered interface detection assembly and the liquid level sensor are matched with the PLC to control the electric control valve, so that the condensed mixed liquid is automatically separated and collected; the water removal assembly is used, so that the content of water in the recovered solvent is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of chemical production technology, more particularly to a mixed gas separation treatment device. BACKGROUND

[0002] In chemical production, dichloromethane is often used in various chemical reaction processes, and the production process often produces mixed gas containing dichloromethane, water vapor and air. These mixed gases are sucked into the safety tank by the vacuum unit, and are liquefied by the heat exchanger condensate above the safety tank, forming a mixed liquid of dichloromethane and water. Since dichloromethane and water are not miscible, the mixed liquid naturally separates in the safety tank. However, the recovered dichloromethane still contains a high moisture content compared to the finished product dichloromethane, affecting its subsequent use and quality.

[0003] In addition, in the prior art, the treatment of such mixed liquids mostly relies on manual judgment of the layering situation and manual operation of drainage, which is not only inefficient, but also difficult to accurately control the drainage timing. Since the boiling point of dichloromethane is low, when the ambient temperature is high, such as in summer, the temperature of the collected dichloromethane in the safety tank rises, and the evaporation speed increases, causing gaseous dichloromethane to escape from the exhaust pipe of the safety tank, resulting in an increase in the cost of subsequent environmental treatment and loss of materials. In addition, manual operation is prone to errors, and when the worker fails to observe the liquid surface interface layer in time during the discharge process, the separated dichloromethane and water will be re-mixed in the subsequent system, seriously affecting the recovery efficiency of dichloromethane. SUMMARY

[0004] To solve the above problems, the utility model aims to provide a mixed gas separation treatment device to solve the problem of separating and collecting the mixed liquid after condensation of multiple gases relying on manual judgment of the layering situation and manual drainage in the prior art, which is not only inefficient and prone to errors, but also has a lot of water in the recovered reagent.

[0005] In order to achieve the above object, the utility model discloses the technical scheme that a kind of mixed gas separation processing device is adopted, including safety tank, the top of the safety tank is connected with the outlet of heat exchanger, heat exchanger is communicated with the exhaust port of vacuum machine set, the top of the safety tank is also connected with exhaust pipeline, liquid level sensor is installed on the safety tank, the bottom of the safety tank is provided with discharge port, the discharge port is connected with the top end of layered interface detection component, the layered interface detection component includes glass test tube, the upper and lower ends of the glass test tube are connected with discharge port and connecting flange respectively, the outside of the glass test tube is covered with the shell of two clamps, two the shell is inclinedly provided with outer shell, the inner side of two the outer shell is respectively mounted with photoelectric sensor emission end and photoelectric sensor receiving end, the axis of the photoelectric sensor emission end and photoelectric sensor receiving end is collinear, and the axis of the photoelectric sensor emission end, photoelectric sensor receiving end is in straight line, and the glass tube of the glass test tube passes through, the connecting flange is connected with water removal component, the water removal component is connected with electric control valve, the electric control valve, the liquid level sensor, photoelectric sensor receiving end are electrically connected with PLC.

[0006] The utility model discloses the beneficial effect is: through the detection function cooperation PLC of layered interface detection component and liquid level sensor to the control of electric control valve realizes the automatic separation collection of the mixed liquid after the condensation of multiple gas, improves recovery efficiency, reduces recovery error rate;The use of water removal component effectively reduces the content of moisture in recovery solvent.

[0007] In order to effectively reduce the influence of external light on the detection accuracy of photoelectric sensor;

[0008] As the further improvement of the above technical scheme: the left and right ends of the clamping plate are provided with end plates, the end plates are provided with through holes matched with plug-in bolts, and the upper and lower end surfaces of the clamping plate are slidably attached to the end surfaces of the upper and lower flanges of the glass test tube.

[0009] The improved clamping plate plays the role of supporting and fixing the outer shell and shielding light to avoid the influence of external light on the detection accuracy of photoelectric sensor.

[0010] In order to accurately identify the liquid level boundary layer;

[0011] As the further improvement of the above technical scheme: the straight line where the axes of the photoelectric sensor emission end and the photoelectric sensor receiving end are located passes through the axis of the glass cylinder of the glass test tube.

[0012] The improved photoelectric sensor emission end can effectively pass through the glass cylinder of the glass test tube to detect the liquid level boundary layer.

[0013] In order to effectively absorb and reduce the moisture in the solvent;

[0014] As a further improvement of the above technical solution, the water removal assembly comprises a variable-diameter pipe, flanges are welded at both ends of the variable-diameter pipe, and the variable-diameter pipe is filled with a water absorption agent.

[0015] The improvement has the beneficial effect that when dichloromethane passes through the water absorption agent, the water absorption agent absorbs water while avoiding reaction with dichloromethane, effectively absorbing a small amount of water carried by dichloromethane.

[0016] In order to improve the water removal effect of the water absorption agent,

[0017] As a further improvement of the above technical solution, the variable-diameter pipe is a variable-diameter pipe structure with a thick middle section and thin ends.

[0018] The improvement has the beneficial effect that the thick middle section of the variable-diameter pipe can increase the capacity of the water absorption agent, thereby improving the water removal effect of the water absorption agent.

[0019] In order to conveniently replace the water removal assembly,

[0020] As a further improvement of the above technical solution, a manual valve is connected between the layered interface detection assembly and the water removal assembly.

[0021] The improvement has the beneficial effect that the operator can remove the water removal assembly after closing the manual valve, avoiding leakage of the liquid in the safety tank.

[0022] The parts not involved in the device are the same as or can be implemented by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The figure is a structural schematic diagram of the utility model;

[0024] Figure 2 The figure is an exploded view of the layered interface detection assembly in the utility model;

[0025] Figure 3 The figure is a sectional view of the layered interface detection assembly in the utility model;

[0026] Figure 4 The figure is a sectional view of the water removal assembly in the utility model;

[0027] In the figure: 1, safety tank; 2, discharge port; 3, layered interface detection assembly; 31, glass test tube; 32, clamping plate; 33, end plate; 34, outer shell; 35, photoelectric sensor transmitting end; 36, photoelectric sensor receiving end; 4, connecting flange; 5, manual valve; 6, water removal assembly; 61, variable-diameter pipe; 62, flange; 63, water absorption agent; 7, electric control valve; 8, liquid level sensor. DETAILED DESCRIPTION

[0028] In order to make the technical solution of the present application better understood by those skilled in the art, the present application will be described in detail below in conjunction with the drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present application.

[0029] Example 1:

[0030] As Figure 1A mixed gas separation treatment device, as shown in 4: a safety tank 1, the top of the safety tank 1 is connected with the outlet of heat exchanger, the heat exchanger is communicated with the exhaust port of vacuum unit, the top of the safety tank 1 is also connected with the exhaust pipeline, the safety tank 1 is installed with liquid level sensor 8, the bottom of the safety tank 1 is provided with discharge port 2, the discharge port 2 is connected with the top end of layered interface detection assembly 3, the layered interface detection assembly 3 includes glass test tube 31, the upper and lower ends of the glass test tube 31 are connected with the discharge port 2 and the connecting flange 4 respectively, the outer side of the glass test tube 31 is covered with the shell composed of two clamps 32, two outer shells 34 are arranged on the two clamps 32, the inner sides of the two outer shells 34 are respectively installed with photoelectric sensor emitting end 35 and photoelectric sensor receiving end 36, the axes of the photoelectric sensor emitting end 35 and the photoelectric sensor receiving end 36 are collinear, and the straight line where the axes of the photoelectric sensor emitting end 35 and the photoelectric sensor receiving end 36 are located passes through the glass tube of the glass test tube 31, the connecting flange 4 is connected with the water removal assembly 6, the water removal assembly 6 is connected with electric control valve 7, the electric control valve 7, the liquid level sensor 8 and the photoelectric sensor receiving end 36 are electrically connected with PLC, through the detection function of the layered interface detection assembly 3 and the liquid level sensor 8 and the control of the electric control valve 7 by PLC, the automatic separation and collection of the mixed liquid after the condensation of various gases are realized, the recovery efficiency is improved, and the recovery error rate is reduced; the use of the water removal assembly 6 effectively reduces the water content in the recovered solvent, end plates 33 are arranged at the left and right ends of the clamp 32, through holes suitable for plug-in bolts are formed in the end plates 33, the upper and lower end faces of the clamp 32 are slidably attached to the end faces of the upper and lower flanges of the glass test tube 31, the clamp 32 plays the role of supporting and fixing the outer shell 34 and shielding light to avoid the influence of external light on the detection accuracy of the photoelectric sensor, the straight line where the axes of the photoelectric sensor emitting end 35 and the photoelectric sensor receiving end 36 are located passes through the axis of the glass cylinder of the glass test tube 31, the light beam emitted by the photoelectric sensor emitting end 35 can effectively pass through the glass cylinder of the glass test tube 31 to detect the liquid surface boundary layer, the water removal assembly 6 includes variable diameter pipe 61, flanges 62 are welded at both ends of the variable diameter pipe 61, the variable diameter pipe 61 is filled with water absorbing agent 63, when dichloromethane passes through the water absorbing agent 63, the water absorbing agent 63 absorbs water while avoiding reaction with dichloromethane, effectively absorbing a small amount of water carried by dichloromethane, the variable diameter pipe 61 is a variable diameter pipe structure with thick middle and thin ends, the thicker middle section of the variable diameter pipe 61 can increase the capacity of the water absorbing agent 63, thereby improving the water removal effect of the water absorbing agent 63, a manual valve 5 is connected between the layered interface detection assembly 3 and the water removal assembly 6, the operator can remove the water removal assembly 6 after closing the manual valve 5, to avoid leakage of the liquid in the safety tank 1.

[0031] The working principle of the technical solution is that the top of the safety tank 1 is connected with the exhaust port and exhaust pipeline of the vacuum unit by using the existing conventional technology, and a heat exchanger is arranged between the safety tank 1 and the exhaust port of the vacuum unit, which is used for recondensation liquefaction treatment of the mixed gas; under the action of density, the liquid condensed in the safety tank 1 is naturally stratified, and the dichloromethane is below the water; when the liquid level in the safety tank 1 reaches the set height threshold, the PLC receives the signal of the liquid level sensor 8, controls the electric control valve 7 to open, and the liquid in the safety tank 1 sequentially passes through the glass test tube 31, the connecting flange 4, the water removal assembly 6 and enters the dichloromethane recovery tank, and in the process of dichloromethane passing through the reducing pipe 61, the dichloromethane is fully contacted with the water absorbing agent 63, and the water in the dichloromethane is effectively removed; when the light beam emitted by the photoelectric sensor emitting end 35 passes through the dichloromethane and water interface layer, the refractive index is affected, which causes the emitted light to deviate, so that the photoelectric sensor receiving end 36 cannot receive the light, and after the PLC receives the information of the photoelectric sensor, the electric control valve 7 is controlled to be closed, and the subsequent water body is stopped to be discharged, so that automatic separation and collection are realized.

[0032] It should be noted that in this document, the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles or devices.

[0033] The principles and implementation modes of the present application are described by using specific examples in this document, and the above examples are only used to help understand the method of the present application and its core idea. The above description is only the preferred embodiment of the present application. It should be noted that due to the limitation of language expression, there are infinite specific structures objectively, and for ordinary skilled persons in the technical field, some improvements, decorations or changes can be made without departing from the principles of the present application, or the technical features described above can be combined in a proper way; these improvements, decorations, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present application.

Claims

1. A mixed gas separation processing apparatus characterized by comprising: The application relates to a safety tank (1) which is connected with the gas outlet of a heat exchanger at the top, the heat exchanger being communicated with the exhaust port of a vacuum unit, the top of the safety tank (1) being further connected with an exhaust pipeline, a liquid level sensor (8) being installed on the safety tank (1), a discharge port (2) being arranged at the bottom of the safety tank (1), the discharge port (2) being connected with the top end of a layered interface detection assembly (3), the layered interface detection assembly (3) comprising a glass test tube (31), the upper and lower ends of the glass test tube (31) being respectively connected with the discharge port (2) and a connecting flange (4), the outer side of the glass test tube (31) being covered with a shell composed of two clamping plates (32), the outer shell (34) being arranged on the two clamping plates (32) in an inclined mode, the inner sides of the two outer shells (34) being respectively installed with a photoelectric sensor emitting end (35) and a photoelectric sensor receiving end (36), the axis lines of the photoelectric sensor emitting end (35) and the photoelectric sensor receiving end (36) being collinear, and the straight line where the axis lines of the photoelectric sensor emitting end (35) and the photoelectric sensor receiving end (36) are located passes through the glass tube of the glass test tube (31), the connecting flange (4) being communicated with a water removal assembly (6), the water removal assembly (6) being connected with an electric control valve (7), the electric control valve (7), the liquid level sensor (8) and the photoelectric sensor receiving end (36) being electrically connected with a PLC.

2. The mixed gas separation treatment device according to claim 1, characterized by: End plates (33) are arranged at the left and right ends of the clamping plates (32), the end plates (33) being provided with through holes matched with plug-in bolts, and the upper and lower end faces of the clamping plates (32) are slidably attached to the end faces of the upper and lower flanges of the glass test tube (31).

3. The mixed gas separation treatment device according to claim 1, characterized by: The straight line where the axis lines of the photoelectric sensor emitting end (35) and the photoelectric sensor receiving end (36) are located passes through the axis line of the glass tube of the glass test tube (31).

4. The mixed gas separation treatment device according to claim 1, characterized by: The water removal assembly (6) comprises a variable-diameter pipe (61), flanges (62) being welded at the two ends of the variable-diameter pipe (61), and a water absorption agent (63) being filled in the variable-diameter pipe (61).

5. The mixed gas separation treatment device according to claim 4, characterized by: The variable-diameter pipe (61) is a variable-diameter pipe structure which is thick in the middle and thin at the two ends.

6. The mixed gas separation treatment device according to claim 1, characterized by: A hand valve (5) is connected between the layered interface detection assembly (3) and the water removal assembly (6).

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