Device with variable reflux ratio

Abstract

The utility model discloses a variable reflux ratio device which comprises a reflux ratio controller, a phase separation device, a reflux pipe liquid flow regulating valve, an outflow pipe liquid flow regulating valve, a reflux pipe liquid flow meter and an outflow pipe liquid flow meter, the backflow ratio controller can control the backflow pipe liquid flow adjusting valve and the outflow pipe liquid flow adjusting valve, and the backflow ratio controller can read data of the backflow pipe liquid flow meter and the outflow pipe liquid flow meter. A reflux ratio controller, a liquid flow detection assembly and a liquid flow adjusting assembly are designed; after the phase separation device is sampled and analyzed, when the reflux ratio needs to be adjusted, the reflux ratio controller obtains data of the liquid flow detection assembly to control the opening and closing degree of the liquid flow adjusting assembly, and therefore the reflux ratio is adjusted.

Description

Technical Field

[0001] The utility model belongs to the technical field of rectification separation, and particularly relates to a device with variable reflux ratio. Background Art

[0002] In the field of chemistry and chemical engineering, rectification separation is a very commonly used technology. Rectification is a separation process that separates each component by using the different volatilities of each component in the mixture. According to the operation mode, rectification can be divided into continuous rectification and batch rectification;

[0003] Rectification is usually carried out in a rectification column. The volatile gas components can be obtained at the upper part of the column, and the less volatile liquid components can be obtained at the lower part of the column. After the liquid flows out of the rectification column, a part of it will flow back into the rectification column. The ratio of the reflux liquid volume to the total outflow liquid volume is the reflux ratio.

[0004] In some continuous rectification productions, the material components used are single and fixed, so the rectification column used also has a fixed reflux ratio. However, in the biomass field, the material components are complex. For example, different origins will also bring differences to the material components. As a result, it is often necessary to sample and analyze the outflow liquid during the production process and then adjust the reflux ratio to control the precision of material rectification. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a device with variable reflux ratio to solve the problem that the reflux ratio of the liquid flowing out of the rectification column in continuous rectification production cannot be adjusted at present.

[0006] To solve the above problems, the utility model provides a device with variable reflux ratio, which includes a reflux ratio controller, a liquid flow detection component, a liquid flow regulation component, and a phase separation device.

[0007] The liquid flow regulation component includes a reflux pipe liquid flow regulation valve and an outflow pipe liquid flow regulation valve; the outlet end of the reflux pipe liquid flow regulation valve is connected to the phase separation device through a reflux pipe, and the outlet end of the outflow pipe liquid flow regulation valve is connected to a storage device through an outflow pipe; a part of the liquid in the phase separation device flows into the inlet end of the reflux pipe liquid flow regulation valve, and another part of the liquid in the phase separation device flows into the inlet end of the outflow pipe liquid flow regulation valve.

[0008] The liquid flow detection component includes a reflux pipe liquid flowmeter and an outflow pipe liquid flowmeter. The reflux pipe liquid flowmeter is connected to the outlet end of the reflux pipe liquid flow regulation valve through a pipeline; the outflow pipe liquid flowmeter is connected to the outlet end of the outflow pipe liquid flow regulation valve through a pipeline.

[0009] The reflux ratio controller is connected to the reflux pipe liquid flow regulation valve, the outflow pipe liquid flow regulation valve, the reflux pipe liquid flowmeter, and the outflow pipe liquid flowmeter through data lines.

[0010] Further, a demisting orifice plate is fixedly arranged horizontally at the upper part inside the phase separation device. The demisting orifice plate divides the inside of the phase separation device into an upper part of the phase separator and a lower part of the phase separator.

[0011] Vertically, the upper part of the demisting orifice plate is the upper part of the phase separator, and the lower part of the demisting orifice plate is the lower part of the phase separator.

[0012] Further, the lower part of the lower part of the phase separator is connected with a liquid storage device through a pipeline. The liquid storage device is connected with the inlet end of a reflux pipe liquid flow regulating valve through a pipeline, and the liquid storage device is also connected with the inlet end of an outflow pipe liquid flow regulating valve through a pipeline.

[0013] Further, the upper part of the phase separator is connected with a material input valve through a pipeline. The outlet end of the material input valve is connected with the upper part of the separator, and the inlet end of the material input valve is connected with a material storage tank through a pipeline.

[0014] Further, one end of the reflux pipe that is not connected to the reflux pipe liquid flow regulating valve is connected to the upper part of the phase separator.

[0015] Further, the bottom of the phase separation device is connected with a bottom liquid discharge valve through a pipeline.

[0016] Further, the reflux ratio controller obtains the flow information of the reflux pipe liquid flowmeter and the outflow pipe liquid flowmeter through wireless communication.

[0017] Further, a condenser valve is also arranged at the top of the phase separation device. The inlet end of the condenser valve is connected with the top of the phase separation device through a pipeline, and the outlet end of the condenser valve is connected with the inlet of the condenser through a pipeline.

[0018] Further, the outlet of the condenser is connected to an exhaust gas treatment device through a pipeline.

[0019] Further, the demisting orifice plate and the inner wall of the phase separation device are detachably connected.

[0020] The beneficial effect of a device with a variable reflux ratio provided by the present utility model lies in that: compared with the prior art, a reflux ratio controller, a liquid flow detection component and a liquid flow regulation component are designed; after sampling and analyzing the liquid flowing out of the phase separation device during continuous distillation production, if it is necessary to adjust the reflux ratio, the reflux ratio controller obtains the data of the liquid flow detection component to control the opening and closing degree of the liquid flow regulation component, so as to realize the adjustment of the reflux ratio. Description of the Drawings

[0021] Figure 1 It is an overall schematic diagram of a device with a variable reflux ratio;

[0022] Figure 2 It is a top view schematic diagram of the demisting orifice plate.

[0023] Icons: 1 - reflux ratio controller, 2 - phase separation device, 21 - upper part of the phase separator, 22 - lower part of the phase separator, 23 - bottom liquid discharge valve, 3 - liquid temporary storage device, 41 - reflux pipe liquid flow regulating valve, 411 - reflux pipe, 42 - outflow pipe liquid flow regulating valve, 421 - outflow pipe, 51 - reflux pipe liquid flowmeter, 52 - outflow pipe liquid flowmeter, 6 - condenser, 61 - condenser valve, 62 - waste gas treatment equipment, 7 - demisting orifice plate, 8 - material storage tank, 81 - material input valve, 9 - storage device. Specific embodiments

[0024] To better understand the purpose, structure and function of the present invention, the following combines the attached Figures 1 to 2 to further describe in detail a device with variable reflux ratio of the present invention.

[0025] As Figure 1 shown, a device with variable reflux ratio in an embodiment of the present invention includes a reflux ratio controller 1, a liquid flow detection component, a liquid flow regulation component, a phase separation device 2 and a storage device 9.

[0026] In the present invention, the liquid flow regulation component includes a reflux pipe liquid flow regulating valve 41 and an outflow pipe liquid flow regulating valve 42. Among them, the outlet end of the reflux pipe liquid flow regulating valve 41 is connected to the phase separation device 2 through a reflux pipe 411, and the outlet end of the outflow pipe liquid flow regulating valve 42 is connected to the storage device 9 through an outflow pipe 423. The liquid flowing out of the outflow pipe will be stored in the storage device 9 and will not flow back to the phase separation device 2.

[0027] A part of the liquid in the phase separation device 2 flows into the inlet end of the reflux pipe liquid flow regulating valve 41, and another part of the liquid in the phase separation device 2 flows into the inlet end of the outflow pipe liquid flow regulating valve 42

[0028] In one embodiment, the device with variable reflux ratio is further provided with a liquid temporary storage device 3. After the liquid output from the phase separation device 2 is sent to the liquid temporary storage device 3 through a pipeline, after the liquid is cached in the liquid temporary storage device 3, the liquid temporary storage device 3 then transports the liquid to the inlet end of the reflux pipe liquid flow regulating valve 41 and the inlet end of the outflow pipe liquid flow regulating valve 42.

[0029] The liquid flow detection assembly includes a reflux pipe liquid flowmeter 51 and an outflow pipe liquid flowmeter 52. The reflux pipe liquid flowmeter 51 is connected to the outlet end of the reflux pipe liquid flow regulating valve 41 through a pipeline; the outflow pipe liquid flowmeter 52 is connected to the outlet end of the outflow pipe liquid flow regulating valve 42 through a pipeline.

[0030] The reflux ratio controller 1 is connected to the reflux pipe liquid flow regulating valve 41, the outflow pipe liquid flow regulating valve 42, the reflux pipe liquid flowmeter 51, and the outflow pipe liquid flowmeter 52 through data lines. The reflux ratio controller 1 can be composed of a PLC (programmable logic controller) and supporting components. The reflux ratio controller 1 calculates the current reflux ratio by reading the flow data of the reflux pipe liquid flowmeter 51 and the outflow pipe liquid flowmeter 52, and controls the opening and closing degrees of the reflux pipe liquid flow regulating valve 41 and the outflow pipe liquid flow regulating valve 42 when the reflux ratio needs to be adjusted.

[0031] As Figure 1 and 2 shown, in the present utility model, a demisting orifice plate 7 is fixedly arranged horizontally in the upper part of the phase separation device 2. The demisting orifice plate 7 divides the interior of the phase separation device 2 into an upper phase separator 21 and a lower phase separator 22. Vertically, above the demisting orifice plate 7 is the upper phase separator 21, and below the demisting orifice plate 7 is the lower phase separator 22. One end of the reflux pipe 411 that is not connected to the reflux pipe liquid flow regulating valve 41 is also connected to the upper phase separator 21.

[0032] During the rectification process, most of the substances in the upper phase separator 21 are gases, and mainly liquids in the lower phase separator 22. The gases in the lower phase separator 22 will pass upward through the demisting orifice plate 7 into the upper phase separator 21. Some of the gases will condense into liquids and return to the lower phase separator 22 after encountering the demisting orifice plate 7, and the uncondensed gases will pass through the demisting orifice plate 7 and gather in the upper phase separator 21.

[0033] The liquids in the lower phase separator 22 are single-phase liquids after multiple condensations. These liquids will be transported through pipelines to the liquid temporary storage device 3 for temporary storage. Since the liquid temporary storage device 3 is connected to the reflux pipe liquid flow regulating valve 41 and the outflow pipe liquid flow regulating valve 42, a part of the single-phase liquids in the liquid temporary storage device 3 will flow to the reflux pipe liquid flow regulating valve 41, and the other part will flow to the outflow pipe liquid flow regulating valve 42.

[0034] After the reflux pipe liquid flowmeter 51 at the outlet of the reflux pipe liquid flow regulating valve 41 and the outlet pipe liquid flowmeter 52 at the outlet of the outlet pipe liquid flow regulating valve 42, the reflux ratio controller 1 can obtain the current flow data through the liquid flow detection component and calculate the current reflux ratio. During the process determination by the staff, it is necessary to sample the liquid flowing out of the liquid flow regulating component. After analyzing the sampled liquid, the staff calculates the reflux ratio of the current material. Subsequently, the staff inputs the reflux ratio of the current material into the reflux ratio controller 1. The reflux ratio controller 1 adjusts the opening and closing degrees of the reflux pipe liquid flow regulating valve 41 and the outlet pipe liquid flow regulating valve 42 according to the existing reflux ratio and the newly obtained reflux ratio, so that the reflux ratio of the liquid flowing out of the liquid flow regulating component is the same as the reflux ratio of the current material calculated by the staff. For example, if the reflux ratio calculated by the staff is 1 / 5, the reflux ratio controller 1 adjusts the ratio of the flow rate of the liquid flowing out of the reflux pipe liquid flow regulating valve 41 to the flow rate of the liquid flowing out of the outlet pipe liquid flow regulating valve 42 to be 1:4.

[0035] During the rectification process, the staff can also sample and analyze the liquid flowing out of the liquid flow regulating component at any time. If it is analyzed that the reflux ratio still needs to be adjusted, the new reflux ratio is input into the reflux ratio controller 1, and the reflux ratio controller 1 will adjust the opening and closing degrees of the reflux pipe liquid flow regulating valve 41 and the outlet pipe liquid flow regulating valve 42 again.

[0036] Understandably, the upper part 21 of the phase separator is connected with a material input valve 81 through a pipeline. The outlet end of the material input valve 81 is connected to the upper part 21 of the separator, and the inlet end of the material input valve 81 is connected to the material storage tank 8 through a pipeline. The material to be rectified is stored in the material storage tank 8, and during the rectification process, the material will enter the upper part 21 of the phase separator from the material storage tank 8 through the material input valve 81 for rectification.

[0037] The bottom of the phase separation device 2 is also connected to the bottom drain valve 23 through a pipeline. When it is necessary to clean the phase separation device 2 and / or the demisting orifice plate 7, the cleaning waste liquid after cleaning can be discharged out of the phase separation device 2 through the bottom drain valve 23.

[0038] A condenser valve 61 is also provided at the top of the phase separation device 2. The inlet end of the condenser valve 61 is connected to the top of the phase separation device 2 through a pipeline, and the outlet end of the condenser valve 61 is connected to the inlet of the condenser 6 through a pipeline. The outlet of the condenser 6 is connected to the waste gas treatment device 62 through a pipeline. The gas that is not condensed in the upper part 21 of the phase separator enters the condenser 6 through the condenser valve 61 for further condensation. The condensed liquid will flow back to the upper part 21 of the phase separator through the condenser valve 61 and finally flow back to the lower part 22 of the phase separator. The gas that has not been condensed into liquid in the condenser will be discharged after being treated by the waste gas treatment device 62.

[0039] In one embodiment, the reflux ratio controller 1 obtains the flow information of the reflux pipe liquid flowmeter 51 and the outflow pipe liquid flowmeter 52 through wireless communication.

[0040] It can be understood that the demisting orifice plate 7 is detachably connected to the inner wall of the phase separation device 2, which is convenient for replacing a new demisting orifice plate 7 or disassembling and cleaning.

[0041] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device with variable reflux ratio, characterized in that, It includes a reflux ratio controller (1), a liquid flow rate detection component, a liquid flow rate adjustment component, and a phase separation device (2); The liquid flow rate adjustment component includes a reflux pipe liquid flow rate adjustment valve (41) and an outflow pipe liquid flow rate adjustment valve (42); the outlet end of the reflux pipe liquid flow rate adjustment valve (41) is connected to the phase separation device (2) through a reflux pipe (411), and the outlet end of the outflow pipe liquid flow rate adjustment valve (42) is connected to a storage device (9) through an outflow pipe (423); a part of the liquid in the phase separation device (2) flows into the inlet end of the reflux pipe liquid flow rate adjustment valve (41), and another part of the liquid in the phase separation device (2) flows into the inlet end of the outflow pipe liquid flow rate adjustment valve (42); The liquid flow rate detection component includes a reflux pipe liquid flow meter (51) and an outflow pipe liquid flow meter (52), and the reflux pipe liquid flow meter (51) is connected to the outlet end of the reflux pipe liquid flow rate adjustment valve (41) through a pipeline; the outflow pipe liquid flow meter (52) is connected to the outlet end of the outflow pipe liquid flow rate adjustment valve (42) through a pipeline; The reflux ratio controller (1) is connected to the reflux pipe liquid flow rate adjustment valve (41), the outflow pipe liquid flow rate adjustment valve (42), the reflux pipe liquid flow meter (51), and the outflow pipe liquid flow meter (52) through data lines.

2. The device with variable reflux ratio according to claim 1, characterized in that, An anti-foaming orifice plate (7) is fixedly arranged horizontally in the upper part of the phase separation device (2), and the anti-foaming orifice plate (7) divides the inside of the phase separation device (2) into an upper part of the phase separator (21) and a lower part of the phase separator (22); Vertically, above the anti-foaming orifice plate (7) is the upper part of the phase separator (21), and below the anti-foaming orifice plate (7) is the lower part of the phase separator (22).

3. The device with variable reflux ratio according to claim 2, characterized in that, The lower part of the lower part of the phase separator (22) is connected to a liquid temporary storage device (3) through a pipeline, the liquid temporary storage device (3) is connected to the inlet end of the reflux pipe liquid flow rate adjustment valve (41) through a pipeline, and the liquid temporary storage device (3) is also connected to the inlet end of the outflow pipe liquid flow rate adjustment valve (42) through a pipeline.

4. The apparatus with variable reflux ratio according to claim 2, characterized in that, The upper part of the phase separator (21) is connected to a material input valve (81) through a pipeline, The outlet end of the material input valve (81) is connected to the upper part of the phase separator (21), and the inlet end of the material input valve (81) is connected to a material storage tank (8) through a pipeline.

5. The device with variable reflux ratio according to claim 2, wherein One end of the reflux pipe (411) that is not connected to the reflux pipe liquid flow rate adjustment valve (41) is connected to the upper part of the phase separator (21).

6. The apparatus with variable reflux ratio according to claim 1, characterized in that, The bottom of the phase separation device (2) is connected to a bottom liquid discharge valve (23) through a pipeline.

7. The device with variable reflux ratio according to claim 1, characterized in that, The reflux ratio controller (1) obtains the flow rate information of the reflux pipe liquid flow meter (51) and the outflow pipe liquid flow meter (52) through wireless communication.

8. The apparatus with variable reflux ratio according to claim 1, characterized in that, A condenser valve (61) is further provided at the top of the phase separation device (2). The inlet end of the condenser valve (61) is connected to the top of the phase separation device (2) through a pipeline, and the outlet end of the condenser valve (61) is connected to the inlet of the condenser (6) through a pipeline.

9. The apparatus with variable reflux ratio according to claim 8, characterized in that, The outlet of the condenser (6) is connected to the waste gas treatment device (62) through a pipeline.

10. The device with variable reflux ratio according to claim 2, characterized in that, The demisting orifice plate (7) is detachably connected to the inner wall of the phase separation device (2).

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