Rectifying tower reflux ratio control device

Abstract

The utility model discloses a rectifying tower reflux ratio control device which comprises a swing funnel, a straight pipe section is communicated with the outer wall of an inner reflux device outer sleeve at the position corresponding to the swing funnel, the straight pipe section is smoothly connected with the lower portion of an inclined pipe inclining upwards, and the swing funnel is connected with one end of a stainless steel loop chain. The other end of the stainless steel loop chain penetrates through the straight pipe section and the inclined pipe to be fixedly connected with an iron core, and the iron core is installed in a sealed stainless steel sleeve and can slide upwards in the stainless steel sleeve under the action of a direct-current electromagnetic coil or slide to the bottom of the stainless steel sleeve under the action of gravity. The swing funnel can swing to the position above the backflow overflow pipe under the driving of the stainless steel loop chain or is arranged in the vertical direction under the action of gravity. The device is beneficial to heat dissipation of the iron core and the coil in the air; the working state of the backflow coil can be accurately controlled, and the problem of magnetic force reduction due to high temperature is avoided.

Description

Technical Field

[0001] The utility model relates to a reflux ratio control device, in particular to a reflux ratio control device for a distillation tower. Background Art

[0002] Chemical production often requires the separation of liquid materials. While there are many methods for separating miscible liquid mixtures, distillation is a very important one. During the distillation process, a reflux ratio distributor can adjust the product composition. Controlling the reflux ratio plays a positive role in improving the separation of the two components.

[0003] like Figure 1 As shown, the patent number is 2022214312579, and the invention name is "An internal reflux device for an experimental distillation tower". The structure includes an internal reflux inner gas channel tube 5, which is arranged in the internal reflux outer sleeve 9, and the top outlet of the internal reflux inner gas channel tube extends into the lower part of the condenser, and the lower part of the condenser is connected to the upper part of the internal reflux outer sleeve 9 through a flange. The structure also includes a swinging funnel 4 installed in the outer sleeve 9 of the inner recirculator and located outside the gas channel tube 5 in the inner recirculator. A Z-shaped reflux pipeline is composed of an upper tube, an intermediate tube and a lower tube connected in sequence. A stepped reflux hole with an axis arranged in a vertical direction is opened on the condenser flange used to connect the condenser and the gas channel tube 5 in the inner recirculator. The head end inlet of the upper tube of the reflux pipeline is connected to the outlet of the lower hole of the stepped hole. The outlet end of the lower tube of the reflux pipeline is inserted into the swinging funnel 4. The lower tube and the funnel are rotatably connected by a pin 3. The inner side of the production pipe 8 passes through the outer wall of the inner recirculator outer sleeve 9 and extends into the inner recirculator outer sleeve 9. When the swinging funnel is in a vertical position, the outlet end of the bottom is aligned with the inlet of the production pipe 8; a reflux overflow pipe 10 is connected to the bottom inner wall of the inner recirculator outer sleeve 9, and the reflux overflow pipe 10 is connected to the liquid reflux hole opened on the side wall of the gas channel tube 5 in the inner recirculator.

[0004] In the existing reflux ratio control device of the reflux tower, the iron core 6 is welded to the outer wall of the outer sleeve 9 of the inner reflux device. Since the outer wall of the inner reflux device is insulated and there is a continuous flow of two-component steam rising, the heat transferred to the iron core is very high. If the magnetic force decreases after long-term operation, the heat generated by the iron core plus the DC electromagnetic coil will accumulate more heat, which will accelerate the failure of the iron core. Figure 1 Single arrows represent liquid, and double arrows represent vapor. Summary of the Invention

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a distillation tower reflux ratio control device which can extend the service life of the coil, can operate for a long period of time, and accurately control the working state.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model discloses a reflux ratio control device for a distillation tower, comprising a swinging funnel, wherein the upper end of the swinging funnel is rotatably connected to the lower end of a reflux pipeline, and the outlet end of the lower end of the reflux pipeline is inserted into the swinging funnel, the upper end of the reflux pipeline is connected to a liquid outlet reflux hole for liquid outlet at the lower part of a condenser, a reflux overflow pipe is connected to the bottom inner wall of an outer sleeve of an inner reflux device, the reflux overflow pipe is connected to a liquid reflux hole opened on the bottom side wall of a gas channel tube of the inner reflux device, and the inner side of a production pipe passes through the outer wall of the inner reflux device outer sleeve and extends into the inner reflux device outer sleeve:

[0008] A straight pipe section is connected to the outer wall of the outer sleeve of the inner reflux device at the position corresponding to the swinging funnel. The straight pipe section is smoothly connected to the lower part of the upward inclined inclined tube. The swinging funnel is connected to one end of the stainless steel ring chain. The other end of the stainless steel ring chain passes through the straight pipe section and the inclined tube and is fixedly connected to an iron core. The iron core is installed in a sealed stainless steel casing. The bottom of the sealed stainless steel casing is fixedly connected to the top of the inclined tube. The length of the iron core is less than the length of the stainless steel casing and the diameter is greater than the diameter of the inclined tube. The DC electromagnetic coil is mounted on the upper outer wall of the sealed stainless steel casing. The iron core can slide upward in the stainless steel casing under the action of the DC electromagnetic coil or can slide to the bottom of the stainless steel casing under the action of gravity. The swinging funnel can swing to the top of the reflux overflow pipe driven by the stainless steel ring chain so that the liquid flowing out of the swinging funnel enters the reflux overflow pipe or is arranged in a vertical direction under the action of gravity so that the liquid flowing out of the swinging funnel enters the inlet of the production pipe.

[0009] Compared with the existing technology, the advantages of adopting the utility model are:

[0010] 1. This device keeps the iron core and coil away from the internal reflux insulation area, making maintenance and replacement easy.

[0011] 2. This device reduces the heat transfer from the tower to the core and coil.

[0012] 3. This device helps the iron core and coil dissipate heat in the air.

[0013] 4. The device can accurately control the working state of the return coil to avoid the problem of magnetic force drop due to high temperature.

[0014] 5. This device prolongs the service life of the coil and can operate for a long period of time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural diagram of an existing distillation tower reflux ratio control device;

[0016] Figure 2 It is a three-dimensional structural diagram of the distillation tower reflux ratio control device of the present invention. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] The device of the utility model is an improvement based on patent No. 2022214312579.

[0019] like Figure 2 As shown, the present invention provides a reflux ratio control device for a distillation tower, comprising a swinging funnel, the upper end of which is rotatably connected to the lower end of a reflux pipeline, the outlet of which is inserted into the swinging funnel. The upper end of the reflux pipeline is connected to a liquid reflux hole at the bottom of a condenser. A reflux overflow pipe 10 is connected to the bottom inner wall of an inner reflux outer sleeve 9, and the reflux overflow pipe 10 is connected to a liquid reflux hole formed on the bottom side wall of the inner reflux inner gas channel tube 5. The inner side of the extraction pipe 8 passes through the outer wall of the inner reflux outer sleeve 9 and extends into the inner reflux outer sleeve 9.

[0020] A straight pipe section is connected to the outer wall of the inner reflux outer sleeve 9 at a position corresponding to the swinging funnel. The straight pipe section is smoothly connected to the lower part of the upward-inclined inclined tube. The swinging funnel is connected to one end of a stainless steel ring chain 11. The other end of the stainless steel ring chain 11 passes through the straight pipe section and the inclined tube and is fixedly connected to an iron core 6. The iron core 6 is installed in a sealed stainless steel casing. The bottom of the sealed stainless steel casing is fixedly connected to the top of the inclined tube. The length of the iron core is less than the length of the stainless steel casing and the diameter is greater than the diameter of the inclined tube. Preferably, the inner wall of the stainless steel casing is a smooth surface. It is further preferred that lubricating grease is applied to the inner wall of the stainless steel casing. The DC electromagnetic coil 7 is mounted on the outer wall of the upper part of the sealed stainless steel casing. The iron core can slide upward in the stainless steel casing under the action of the DC electromagnetic coil or can slide to the bottom of the stainless steel casing under the action of gravity. The specific structure is as follows: when the DC electromagnetic coil 7 is not energized, the iron core 6 is at the bottom of the stainless steel casing. When the DC electromagnetic coil 7 is energized, the iron core 6 moves rapidly toward the top of the stainless steel casing under the action of magnetic force, and stops at the top. When the DC electromagnetic coil 7 is de-energized again, the iron core 6 slides toward the bottom of the stainless steel casing under the action of gravity, and stops at the bottom. The swing funnel, driven by the stainless steel chain, can swing to the top of the reflux overflow pipe 10 so that the liquid flowing out of the swing funnel enters the reflux overflow pipe, or it can be arranged in a vertical direction under the action of gravity so that the liquid flowing out of the swing funnel enters the inlet of the production pipe 8.

[0021] Here's how it works:

[0022] The bicomponent vapor (double arrows) within the tower rises through the gas channel 5 within the internal reflux chamber, reaching the temperature measuring sleeve 2, where its temperature is measured. This temperature is the tower top temperature. The bicomponent vapor (double arrows) then passes through the cap 1 and comes into contact with the condenser. After condensation, the bicomponent vapor (double arrows) turns into a bicomponent liquid (single arrow). When the DC electromagnetic coil 7 is de-energized, the bicomponent liquid (single arrow) flows under gravity toward the swing funnel 4, which is in a naturally drooping state. The bicomponent liquid (single arrow) continues to flow downward to the extraction pipe 8, where it is discharged.

[0023] When the DC electromagnetic coil 7 is energized, it is in a reflux state: the two-component liquid (single arrow) flows toward the swing funnel under the action of gravity. Since the DC electromagnetic coil is energized, the iron core 6 moves upward rapidly under the electromagnetic action and stops at the top. The stainless steel chain 11 is pulled by the iron core and simultaneously pulls the swing funnel, causing it to be in a tilted state. The two-component liquid (single arrow) flows to the reflux overflow pipe 10 through the swing funnel in a tilted state, and the two-component liquid (single arrow) returns to the tower.

Claims

1. A reflux ratio control device for a distillation tower, comprising a swinging funnel, wherein the upper end of the swinging funnel is rotatably connected to the lower end of a reflux pipeline and the outlet end of the lower end of the reflux pipeline is inserted into the swinging funnel, the upper end of the reflux pipeline is connected to a liquid outlet reflux hole for discharging liquid from the lower part of a condenser, a reflux overflow pipe (10) is connected to the bottom inner wall of an outer sleeve (9) of an inner reflux device, the reflux overflow pipe is connected to a liquid reflux hole opened on the bottom side wall of a gas channel pipe (5) in the inner reflux device, the inner side of a production pipe passes through the outer wall of the inner reflux device outer sleeve and extends into the inner reflux device outer sleeve, characterized in that: A straight pipe section is connected to the outer wall of the outer sleeve of the inner reflux device at a position corresponding to the swing funnel. The straight pipe section is smoothly connected to the lower part of the upward inclined pipe. The swing funnel is connected to one end of a stainless steel ring chain (11). The other end of the stainless steel ring chain passes through the straight pipe section and the inclined pipe and is fixedly connected to an iron core (6). The iron core is installed in a sealed stainless steel casing. The bottom of the sealed stainless steel casing is fixedly connected to the top of the inclined pipe. The length of the iron core is less than the length of the stainless steel casing and the diameter is greater than the diameter of the inclined pipe. A DC electromagnetic coil (7) is sleeved on the outer wall of the upper part of the sealed stainless steel casing. Under the action of the DC electromagnetic coil, the iron core can slide upward in the stainless steel casing or can slide to the bottom of the stainless steel casing under the action of gravity. The swing funnel can swing to the top of the reflux overflow pipe under the drive of the stainless steel ring chain so that the liquid flowing out of the swing funnel enters the reflux overflow pipe or is set in the vertical direction under the action of gravity so that the liquid flowing out of the swing funnel enters the inlet of the extraction pipe (8).

2. The distillation tower reflux ratio control device according to claim 1, characterized in that: The inner wall of the stainless steel sleeve is a smooth surface.

3. The distillation tower reflux ratio control device according to claim 1 or 2, characterized in that: The inner wall of the stainless steel casing is coated with lubricating grease.

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