A carbon dioxide removal device

Abstract

The application discloses a kind of impurity removal formula gas-liquid shunt for propylene carbonate production processing, it is for the hydraulic pressure generated in the process of propylene carbonate mixed liquid injection, cooperate spiral piece group under the action of hydraulic pressure and carry out adaptability rotation, the key purpose is in " extension " propylene carbonate mixed liquid flow distance, and in the process of propylene carbonate mixed liquid flow with heating template to provide heat source, ensure that the gas dissolved in propylene carbonate mixed liquid is precipitated, in this process, on the one hand, through the fall pipe combines liquid level balance principle, the gas precipitated is transferred to gas-liquid separation pipe, and further utilize the hydraulic pressure when propylene carbonate mixed liquid injection, the key purpose is in: utilize the difference between the gas pressure generated by gas and the hydraulic pressure of propylene carbonate mixed liquid, ensure that the gas precipitated is discharged in the form of independent liquid.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of propylene carbonate production, and particularly relates to a gas-liquid separation type flow divider for propylene carbonate production and processing. BACKGROUND

[0002] Propylene carbonate is prepared by using components such as propylene oxide, carbon dioxide and a catalyst, and the synthetic product contains propylene carbonate and various by-products, and the propylene carbonate with higher purity needs to be obtained through a purification process. The related content in CN215049789U can be referred to.

[0003] The gas in the synthetic product needs to be further discharged before the purification process. The essence is to mainly use a gas-liquid separation type flow divider. The related content in CN220609559U can be referred to. However, in the synthetic preparation process, part of the gas is dissolved in the synthetic product. In the subsequent purification (distillation) process, the gas in the synthetic product is also indirectly affected when the gas is released by heating. The conventional gas-liquid separation type flow divider separates the gas by using the centrifugal force generated by the medium circulating flow. However, it is difficult to sufficiently release the gas dissolved in the liquid. Therefore, the application provides a solution. SUMMARY

[0004] The application aims to provide a gas-liquid separation type flow divider for propylene carbonate production and processing. The synthetic product of propylene carbonate can dissolve part of the gas. The conventional gas-liquid separation type flow divider only relies on the centrifugal force and cannot sufficiently remove the dissolved gas, which directly affects the subsequent purification process and the purification purity of the propylene carbonate.

[0005] The application can be realized by the following technical scheme: a gas-liquid separation type flow divider for propylene carbonate production and processing, comprising a shell and a heating assembly. A gas-liquid separation pipe is vertically arranged on the center point of the upper surface of the shell. A water outlet and a water supplementing outlet are respectively arranged on the outer edge of the shell and the center point of the lower surface of the shell.

[0006] A spiral fin group is arranged in the shell. The heating assembly is arranged on the lower side of the corresponding spiral fin group. A coordinated assembly is arranged in the gas-liquid separation pipe. A plurality of drop pipes are arranged on the upper surface of the shell.

[0007] The coordinated assembly comprises a piston block, a separation block, a vortex fan group and a filter cover arranged from top to bottom. A movable guide pipe is fixedly arranged between the vortex fan group and the filter cover. A movable guide rod is slidably arranged in the movable guide pipe. The movable guide rod is fixedly connected and slidably connected with the piston block and the separation block.

[0008] Further arrangement: the helical blade group is rotationally connected inside the shell, and the movable guide pipe is slidingly connected with the helical blade group.

[0009] Further arrangement: the fall difference pipe is composed of a plurality of vertically arranged empty pipes, the height of each empty pipe increases along the direction from the center point of the shell to the water outlet, and the empty pipe close to the water outlet is provided with a gas-liquid transposition pipe between the gas-liquid separation pipe.

[0010] Further arrangement: the gas-liquid separation pipe is provided with a gas outlet, the intersection position of the gas-liquid transposition pipe and the gas-liquid separation pipe and the opening position of the gas outlet are located at the intermediate position of the piston block and the separation block, and the piston block, the separation block and the inner wall of the gas-liquid separation pipe are slidingly connected and fixedly connected, respectively.

[0011] Further arrangement: the movable guide rod is provided with a pressure cone cap at the lower side position corresponding to the separation block, and the movable guide pipe is provided with a through hole at the outer wall position corresponding to the movable guide rod, and the lower end position of the movable guide pipe is communicated with the lower side position of the filter cover.

[0012] Further arrangement: the gas-liquid separation pipe is provided with a gas bag action assembly at the upper end position, and the action position of the gas bag action assembly is fixedly connected with the movable guide rod.

[0013] Further arrangement: a plurality of liquid guide columns are installed at the lower side position of the piston block, and the liquid guide columns penetrate downward to the lower position of the separation block.

[0014] Further arrangement: the separation block is provided with a liquid guide groove corresponding to the liquid guide column, the diameter of the liquid guide groove is greater than the outer diameter of the liquid guide column, and the liquid guide column corresponds to the blocking ball of the separation block.

[0015] The present application has the following advantages:

[0016] 1. For the gas that may be dissolved in the propylene carbonate preparation process, the present application is based on the helical blade group, combined with the hydraulic pressure generated when the propylene carbonate mixed liquid is injected, the helical blade group "extends" the flow distance of the propylene carbonate mixed liquid inside the shell, and the heating module provides heat energy to ensure that the gas dissolved in the propylene carbonate mixed liquid is precipitated, and further limits the heating temperature of the heating template on the basis of ensuring the precipitation of the gas, avoids affecting the propylene carbonate component;

[0017] 2. Based on the above, during the flow of the propylene carbonate mixture, the gas-liquid mixture is first transferred to the gas-liquid separator pipe through the drop pipe. During this process, the piston block and separator block are moved directionally by the difference between air pressure and hydraulic pressure. This ensures that the gas is discharged normally from the outlet and that some of the liquid that has seeped into the gas-liquid separator pipe returns to the shell. In the overall process, the propylene carbonate mixture flows freely in the spiral vane assembly in a normal manner, and gas is separated during the flow. The propylene carbonate mixture after gas separation flows out from the outlet. At the same time, a filter cover for filtering impurities and a vortex fan assembly are added to cooperate with the flow of the propylene carbonate mixture. The purpose is to ensure that the propylene carbonate mixture flows in a circulating form. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a gas-liquid separator for the production and processing of propylene carbonate, as proposed in this invention.

[0020] Figure 2 This invention proposes a purification-type gas-liquid separator for the production and processing of propylene carbonate. Figure 1 Cross-sectional view;

[0021] Figure 3 This is a top view of the housing in a gas-liquid separator for the production and processing of propylene carbonate, as proposed in this invention.

[0022] Figure 4 This invention proposes a purification-type gas-liquid separator for the production and processing of propylene carbonate. Figure 2 Partial cross-section view;

[0023] Figure 5 This is a schematic diagram of the cooperating component in a gas-liquid separator for the production and processing of propylene carbonate proposed in this invention.

[0024] Figure 6 This invention proposes a purification-type gas-liquid separator for the production and processing of propylene carbonate. Figure 4 The front view;

[0025] Figure 7 This invention proposes a purification-type gas-liquid separator for the production and processing of propylene carbonate.Figure 5 a sectional view.

[0026] In the figure: 1, shell; 101, water outlet; 102, water supplement port; 103, gas outlet; 2, heating assembly; 3, air bag action assembly; 4, gas-liquid separation pipe; 5, fall pipe; 6, gas-liquid transposition pipe; 7, spiral fin group; 8, piston block; 9, movable guide rod; 10, filter cover; 11, vortex fan group; 12, movable guide pipe; 13, pressure cone; 14, separation block; 15, liquid guide column. DETAILED DESCRIPTION

[0027] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] Embodiment one: The carbonic acid propylene ester synthesis product can dissolve part of the gas. The conventional gas-liquid flow divider only relies on the centrifugal force and is difficult to remove the dissolved gas sufficiently, which directly affects the subsequent purification process and specifically affects the purification purity of the carbonic acid propylene ester. The following solution is provided for this problem:

[0029] Reference Figures 1 to 7 The impurity removal type gas-liquid flow divider for carbonic acid propylene ester production and processing in the embodiment includes a shell 1 and a heating assembly 2. A gas-liquid separation pipe 4 arranged vertically is installed at the center point position on the upper surface of the shell 1. A water outlet 101 and a water supplement port 102 are respectively arranged on the outer edge of the shell 1 and the center point position on the lower surface.

[0030] The shell 1 is internally provided with a spiral fin group 7. The heating assembly 2 is installed at the lower side position of the shell 1 corresponding to the spiral fin group 7. A coordinated assembly is arranged in the gas-liquid separation pipe 4. A plurality of fall pipes 5 are installed on the upper surface position of the shell 1.

[0031] The coordinated assembly includes a piston block 8, a separation block 14, a vortex fan group 11 and a filter cover 10 arranged from top to bottom. A movable guide pipe 12 is fixedly installed between the vortex fan group 11 and the filter cover 10. A movable guide rod 9 is slidably installed in the movable guide pipe 12. The movable guide rod 9 is fixedly connected and slidably connected with the piston block 8 and the separation block 14.

[0032] Principle: propylene carbonate conventional synthesis method is under the condition of 150-160 DEG C and 5MPa, carbon dioxide and propylene oxide reaction to form propylene carbonate, and then by vacuum fractionation to get finished product, the specific reaction process obtained product is mixed liquid, and in the specific preparation process mixed liquid dissolved in part of the gas, in order to avoid affecting the later rectification process first need to remove the gas in it, for this the present invention is proposed to heating mode, for this need to explain is:

[0033] Propylene carbonate is a colorless transparent liquid, has a similar odor of alcohol, but lower volatility, its volatility is affected by many factors, such as ambient temperature, atmospheric pressure and container material, under normal room temperature and normal pressure, propylene carbonate is not easy to volatilize, can keep in the container for a long time, specific at 140 DEG C begin to volatilize;

[0034] For this the present invention is the key content in: heating assembly 2 provides 100 DEG C below temperature, specific is to ensure that the moisture in the propylene carbonate liquid boiling, but will not affect its internal propylene carbonate composition, and propylene carbonate mixed liquid in the heating environment, its internal gas volatilization and precipitation, this part is the key content of the present invention;

[0035] Referring to Figure 2 And Figure 3 Need to be added is: propylene carbonate mixed liquid from water supplementing port 102 into the shell 1 inside, propylene carbonate mixed liquid first fills into the gas liquid separation pipe 4, and propylene carbonate mixed liquid gradually flows to the outside along the structure of the spiral piece group 7, until from the water outlet 101, in the propylene carbonate mixed liquid continues to flow in the temperature of heating assembly 2, and the overall heating distance is "extended", ensure that the dissolved gas is fully precipitated.

[0036] Example two: for the propylene carbonate mixed liquid in the shell inside the flow process is supplemented:

[0037] Spiral piece group 7 is rotatingly connected inside the shell 1, the movable conduit 12 and the spiral piece group 7 are slidingly connected, the drop pipe 5 is composed of a plurality of vertical empty pipes, the height of each empty pipe increases along the direction from the center point of the shell 1 to the water outlet 101, and the empty pipe close to the water outlet 101 is provided with the gas liquid transposition pipe 6 between the gas liquid separation pipe 4, the gas liquid separation pipe 4 is provided with the gas outlet 103, the intersection position of the gas liquid transposition pipe 6 and the gas liquid separation pipe 4 and the opening position of the gas outlet 103 are located at the intermediate position of the piston block 8 and the separation block 14, the piston block 8, the separation block 14 and the inner wall of the gas liquid separation pipe 4 are slidingly connected and fixedly connected respectively.

[0038] Scheme description: will Figure 6 Combined to Figure 4The propylene carbonate mixed liquid first passes through the filter cover 10, which is mainly used to preliminarily filter impurities that may exist in the propylene carbonate mixed liquid, and then the propylene carbonate mixed liquid continues to pass through the vortex fan group 11, which mainly drives the propylene carbonate mixed liquid to circulate under the action of the vortex fan group 11, and when the propylene carbonate mixed liquid flows in the spiral blade group 7, it also drives the spiral blade group 7 to rotate slightly;

[0039] However, the key lies in the drop tube 5. During the continuous flow of the propylene carbonate mixed liquid, a part of the liquid will also fill the drop tube 5 upwards, but because there is a problem of gas precipitation in the whole process, the precipitated gas is concentrated in the uppermost position of the drop tube 5, so that Figure 6 For example, after the gas in the inner part of the empty tube closest to the gas-liquid separation tube 4 is more, it will squeeze part of the liquid back into the shell, and in this way, the process is continued, and finally the precipitated gas is mainly concentrated in the upper part of the inner part of the empty tube away from the gas-liquid separation tube 4, so that the precipitated gas is transferred to the gas-liquid separation tube 4 through the gas-liquid displacement tube 6, and is concentrated in the middle position between the piston block 8 and the separation block 14, and is discharged from the gas outlet 103, realizing the independent discharge process of the gas and the liquid two media.

[0040] Example Three: In combination with Example One and Example Two, the gas-liquid separation tube is supplemented:

[0041] The movable guide rod 13 is provided with a pressure cone 13 corresponding to the lower side of the separation block 14, and the movable guide pipe 12 is provided with a through hole corresponding to the outer wall of the movable guide rod 9. The lower end of the movable guide pipe 12 is connected to the lower side of the filter cover 10. The gas bag action assembly 3 is installed on the upper end of the gas-liquid separation tube 4. The action position of the gas bag action assembly 3 is fixedly connected with the movable guide rod 9. A plurality of liquid guide columns 15 are installed on the lower side of the piston block 8, and the liquid guide columns 15 penetrate downward to the lower part of the separation block 14. The separation block 14 is provided with a liquid guide groove corresponding to the liquid guide column 15, and the diameter of the liquid guide groove is greater than the outer diameter of the liquid guide column 15. The liquid guide column 15 corresponds to the blocking ball of the separation block 14.

[0042] First, based on the technical content in Example Two, when the gas enters the inside of the gas-liquid separation tube 4, part of the liquid will also penetrate into the gas-liquid separation tube 4 through the gas, so that there is part of the liquid between the separation block 14 and the piston block 4. To this end, the following technical content needs to be set:

[0043] S1: In the initial state, the piston block 8 is moved downward by the action of the air bag action assembly 3, the essence of the air bag action assembly is the combination of the air bag and the pressure sensor, and the sliding connection is formed between the movable guide rod 9 and the gas-liquid separation pipe 4. The essence of the connection between the movable guide rod 9 and the action position of the air bag action assembly is that the air bag is inflated and deformed by inflating the air bag, thereby generating a downward pressure on the movable guide rod 9, driving the movable guide rod 9 to move downward, and ensuring that each guide liquid column 15 is inserted into the guide liquid groove.

[0044] In this process, the plug ball completely blocks the guide liquid groove, so that the liquid that may seep into the gas-liquid separation pipe 4 is still retained inside. The purpose is to maintain the sealing of the area between the separation block 14 and the piston block 4, so it can be understood that the gas outlet 103 can be opened and closed by a solenoid valve or the like structure, and the pressure in the area between the separation block 14 and the piston block 4 needs to be detected. When the internal pressure environment reaches a certain value, part of the gas is discharged by opening the solenoid valve or the like structure.

[0045] S2: Based on the plugging of the gas outlet 103, the piston block 8 can be driven to move upward, so that the plug ball on the guide liquid column 15 is separated from the guide liquid groove, and part of the liquid is returned to the shell 1. However, it needs to be further explained that when the propylene carbonate mixed liquid is injected into the shell 1, part of the gas will be naturally separated out, and the propylene carbonate mixed liquid will continue to rise in the gas-liquid separation pipe 4.

[0046] In this process, the pressure on the pressure cone 13 can first be upward, driving the entire movable guide rod 9 to move upward, but the essence needs to ensure that the guide liquid column 15 on the piston block 8 completely blocks the separation block 14. Therefore, the combined pressure environment of the liquid pressure and the gas pressure in the shell 1 mainly acts on the air bag action assembly 3, and the pressure of the air bag is detected by the pressure sensor, so that the pressure environment of the area between the piston block 8 and the separation block 14 relative to the shell 1 can be fed back. When the value detected by the pressure sensor reaches a certain value, the gas in the area between the piston block 8 and the separation block 14 is discharged.

[0047] S3: The injection process of the propylene carbonate mixed liquid is described. Although the lower end of the movable guide pipe 12 is communicated with the filter cover 10, the movable guide pipe 12 is blocked by the movable guide rod 9 in the initial state, so that the propylene carbonate mixed liquid can only pass through the filter cover 10. However, when the impurities adsorbed on the filter cover 10 are too much, the propylene carbonate mixed liquid can only enter the movable guide pipe 12 and generate an upward thrust on the movable guide rod 9, thereby further affecting the pressure environment of the air bag in the air bag action assembly, and the opening of the movable guide pipe 12 can be opened after the movable guide rod 9 is driven to move upward. Replace the filter cover 10 in the shell 1.

[0048] In summary, for the hydraulic pressure generated by the propylene carbonate mixed liquid injection process, the spiral fin group is adapted to rotate under the action of the hydraulic pressure, and the key purpose is to "extend" the flow distance of the propylene carbonate mixed liquid, and to provide a heat source by the heating template during the flow of the propylene carbonate mixed liquid, to ensure that the gas dissolved in the propylene carbonate mixed liquid is precipitated. In this process, on the one hand, by means of the fall pipe combined with the liquid level balance principle, the precipitated gas is transferred to the gas-liquid separation pipe, and further by using the hydraulic pressure of the propylene carbonate mixed liquid during injection, the key purpose is to use the difference between the gas pressure generated by the gas and the hydraulic pressure of the propylene carbonate mixed liquid to ensure that the precipitated gas is discharged in the form of independent liquid.

[0049] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and limit the application to the specific embodiments. Obviously, many modifications and changes can be made according to the content of the specification. The specification selects and describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited by the claims and their entire scope and equivalents.

Claims

1. A carbonic acid propylene ester production processing impurity removal type gas-liquid flow divider comprising a shell (1) and a heating assembly (2), characterized in that, The center point position of the upper surface of the shell (1) is provided with a vertical gas-liquid separation pipe (4), and the outer edge of the shell (1) and the center point position of the lower surface are respectively provided with a water outlet (101) and a water supplementing opening (102); The inside of the shell (1) is provided with a spiral fin group (7), the heating assembly (2) is installed on the lower side of the shell (1) corresponding to the spiral fin group (7), the gas-liquid separation pipe (4) is provided with a coordinated assembly, and the upper surface of the shell (1) is provided with a plurality of fall pipes (5); The coordinated assembly comprises a piston block (8), a separation block (14), a vortex fan group (11) and a filter cover (10) arranged from top to bottom, the vortex fan group (11) and the filter cover (10) are fixedly installed with a movable conduit (12), the movable conduit (12) is slidably installed with a movable guide rod (9), and the movable guide rod (9) is fixedly connected and slidably connected with the piston block (8) and the separation block (14); The fall pipe (5) is composed of a plurality of vertical empty pipes, the height of each empty pipe increases along the direction from the center point of the shell (1) to the water outlet (101), and the empty pipe close to the water outlet (101) is installed with a gas-liquid transposition pipe (6) between the gas-liquid separation pipe (4), the gas-liquid separation pipe (4) is provided with an air outlet (103), the intersection position of the gas-liquid transposition pipe (6) and the gas-liquid separation pipe (4) and the opening position of the air outlet (103) are located at the intermediate position of the piston block (8) and the separation block (14), and the piston block (8), the separation block (14) and the inner wall of the gas-liquid separation pipe (4) are respectively slidably connected and fixedly connected.

2. The impurity removal type gas-liquid flow divider for propylene carbonate production process according to claim 1, characterized by, The spiral fin group (7) is rotatably connected inside the shell (1), and the movable conduit (12) is slidably connected with the spiral fin group (7).

3. The impurity removal type gas-liquid flow divider for propylene carbonate production process according to claim 1, characterized in that, The lower side of the movable guide rod (13) is installed with a pressure cone (13) corresponding to the separation block (14), and the outer wall of the movable conduit (12) is provided with a through opening corresponding to the movable guide rod (9), and the lower end of the movable conduit (12) is communicated with the lower side of the filter cover (10).

4. The impurity removal type gas-liquid flow divider for propylene carbonate production process according to claim 1, characterized in that, The upper end of the gas-liquid separation pipe (4) is installed with a gas bag action assembly (3), and the action position of the gas bag action assembly (3) is fixedly connected with the movable guide rod (9).

5. The impurity removal type gas-liquid flow divider for propylene carbonate production process according to claim 1, characterized in that, The lower side of the piston block (8) is installed with a plurality of liquid guide columns (15), and the liquid guide columns (15) penetrate downward to the lower part of the separation block (14).

6. The impurity removal type gas-liquid flow divider for propylene carbonate production process according to claim 5, characterized by, The separation block (14) is provided with a liquid guide groove corresponding to the liquid guide column (15), the diameter of the liquid guide groove is greater than the outer diameter of the liquid guide column (15), and the liquid guide column (15) corresponds to the blocking ball of the separation block (14).

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