CN216062077U

CN216062077U - Automatic continuous reflux ratio controller

Info

Publication number: CN216062077U
Application number: CN202122812824.7U
Authority: CN
Inventors: 杨星; 王振波; 高领; 杨会; 张宇
Original assignee: Xiyi Clothing Zhengzhou Technology Co ltd
Current assignee: Xiyi Clothing Zhengzhou Technology Co ltd
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2022-03-18
Anticipated expiration: 2031-11-15

Abstract

The utility model relates to an automatic continuous reflux ratio controller, which comprises a reflux pipeline and a production pipeline; a first control valve, a current stabilizer and a first float flowmeter are sequentially communicated with the return pipeline; the extraction pipeline is sequentially communicated with a second control valve, a flow stabilizer and a second float flowmeter; a plurality of flow stabilizers are arranged in the flow stabilizer at intervals, and the first flow stabilizer divides the flow stabilizer into a plurality of cavities; the flow stabilizing plate is provided with a communicating cavity for communicating two adjacent cavities of the flow stabilizing plate, the flow stabilizing plate is provided with an overflow port for circulating distillate, and the opening of the communicating cavity is higher than the opening of the overflow port; the flow stabilizer is provided with a tear hole for the circulation of distillate. The whole device can reduce the volatility of distillate, reduce the impact on the internal system of the rectifying tower, simultaneously meet the accurate measurement of the first float flowmeter and the second float flowmeter, and ensure the accuracy of reflux ratio control.

Description

Automatic continuous reflux ratio controller

Technical Field

The utility model relates to the technical field of rectifying tower experimental devices, in particular to an automatic continuous reflux ratio controller.

Background

The rectifying tower is a tower-type gas-liquid contact device for rectifying, and light components in a liquid phase are transferred to a gas phase and heavy components in the gas phase are transferred to the liquid phase by utilizing the property that each component in a mixture has different volatility, namely the vapor pressure of each component is different at the same temperature, so that the aim of separation is fulfilled. The experimental device of the rectifying tower is a small experimental device designed for simulating the rectifying process in actual production to obtain adjustment data for reference. In the process of simulating rectification, the system change in the rectifying tower is often adjusted by controlling the reflux ratio, in the prior art, an electromagnetic valve and a peristaltic pump are usually arranged in a reflux pipeline to be used as a control element for controlling the reflux ratio, however, when the electromagnetic valve is adopted, transient pulse is generated when the electromagnetic valve is switched on and off, the system change in the rectifying tower is influenced, and the experimental parameters are subjected to errors; in addition, the reflux ratio is determined by measuring the opening time of the electromagnetic valves arranged on the reflux branch and the extraction branch in the actual production, the output of the top of the rectifying tower is large in the actual production, the continuous output can be realized, the measured opening time of the electromagnetic valves is the relatively accurate reflux ratio, however, in the experimental device of the rectifying tower, the relative output is less, the flow in the pipeline is not continuous, and certain errors exist in the control of the reflux ratio.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an automatic continuous reflux ratio controller to solve the problem of large control error of reflux ratio in the traditional rectification experimental device.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an automatic continuous reflux ratio controller comprises a reflux pipeline and a production pipeline; the return pipeline is sequentially communicated with a first control valve, a current stabilizer and a first float flowmeter; the extraction pipeline is sequentially communicated with a second control valve, a current stabilizer and a second float flowmeter;

a plurality of flow stabilizers are arranged in the flow stabilizer at intervals, and the first flow stabilizer divides the flow stabilizer into a plurality of cavities; the flow stabilizing plate is provided with a communicating cavity for communicating two adjacent cavities of the flow stabilizing plate, the flow stabilizing plate is provided with an overflow port for circulating distillate, and the opening of the communicating cavity is higher than the opening of the overflow port;

the flow stabilizing plate is provided with a tear hole for the circulation of distillate.

Furthermore, one end of the return pipeline is used for being communicated with the top of the rectifying tower, and the other end of the return pipeline is used for being communicated with an upper return port of the rectifying tower; one end of the extraction pipeline is communicated with the top of the rectifying tower, and the other end of the extraction pipeline is communicated with a corresponding distillate collecting tank.

Furthermore, the cavity bottom of the lowest cavity in the current stabilizer is consistent with the height of the reflux port.

Furthermore, a weir area for reducing the flowing speed of the distillate is arranged above the overflow port.

Further, the first control valve is a first electromagnetic valve; the second control valve is a second solenoid valve.

Furthermore, a pipeline between the current stabilizer and the first float flowmeter in the return pipeline is communicated with a pipeline between the current stabilizer and the second float flowmeter in the production pipeline, and a manual valve is arranged on the communicated pipeline.

Further, the first electromagnetic valve, the second electromagnetic valve, the first float flowmeter and the second float flowmeter are in signal connection with a computer control system.

The utility model has the beneficial effects that:

an automatic continuous reflux ratio controller comprises a reflux pipeline and a production pipeline; a first control valve, a current stabilizer and a first float flowmeter are sequentially communicated with the return pipeline; the extraction pipeline is sequentially communicated with a second control valve, a flow stabilizer and a second float flowmeter; a flow stabilizer is arranged in the flow stabilizer at intervals, a communicating cavity and an overflow port are arranged on the flow stabilizer, the opening of the communicating cavity is higher than the opening of the overflow port, and distillate can be prevented from flowing down from the communicating cavity; the area between the overflow port and the bottom plate forms a buffering area, so that the fluctuation of distillate during flow reduction is reduced, and the distillate can be buffered once when passing through a cavity with a flow stabilizing plate at the bottom of the cavity, so as to reduce the impact on the whole loop caused by the on-off of the first control valve and the second control valve; the tear holes are further formed in the flow stabilizing plate, when the flow of distillate is small, the distillate can slowly flow through the tear holes, the continuous flow of the whole pipeline is guaranteed, the effects of 'discontinuous flow accumulation and continuous flow discharge' are achieved, the accurate measurement of the first float flowmeter and the second float flowmeter is met, and the accuracy of control over the reflux ratio is guaranteed.

Furthermore, a weir area is arranged at the opening above the overflow port, so that distillate in the cavity can smoothly flow into the next cavity, the volatility of the distillate is reduced, and the impact on an internal system of the rectifying tower is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the utility model;

fig. 2 is a schematic structural view of the middle current stabilizer of the utility model.

Names corresponding to the marks in the figure:

1. the device comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a fifth electromagnetic valve, a sixth electromagnetic valve, a seventh electromagnetic valve, a sixth electromagnetic valve, a seventh electromagnetic valve, a sixth electromagnetic valve, a seventh electromagnetic valve, a rectifier, 20, a stabilizer, a communication cavity, 22, an overflow port, 23, a weir area, 24, a tear hole, a first float flowmeter, a second float outlet, a 5, a tower top outlet, a second float outlet, a distillate collector, a second float outlet, 7, a distillate collector, a 5, a tower top outlet, a distillate collector, a 6, a second electromagnetic valve, a distillate collector, a second float flowmeter, a distillate collector, a second electromagnetic valve, a 6, a second float flowmeter, a distillate collector, a second electromagnetic valve, a second float flowmeter, a 8, a second electromagnetic valve, a manual valve, a second float flowmeter, a manual valve, a second electromagnetic valve, a distillate collector, and a manual valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

The embodiment of the utility model comprises the following steps:

as shown in fig. 1-2, an automatic continuous reflux ratio controller includes a reflux line and a production line.

The upper end of the return pipeline and the upper end of the extraction pipeline are communicated with each other and are communicated with the top outlet 5 of the rectifying tower; the lower end of the reflux pipeline is communicated with a reflux port 4 arranged on the rectifying tower so as to reflux the distillate into the rectifying tower again; the lower end of the withdrawal line communicates with a corresponding distillate collection tank 7 for temporarily collecting and storing the distillate.

A first electromagnetic valve 1, a current stabilizer 2 and a first float flowmeter 3 are sequentially communicated and arranged on the return pipeline; the first electromagnetic valve 1 is in signal connection with a computer control system, and the on-off of the first electromagnetic valve is determined by the computer control system; the external profile of the current stabilizer 2 is cylindrical, the inside of the current stabilizer is in a cavity state, four current stabilizers 20 are arranged in the current stabilizer 2 along the up-down direction, the cavity is uniformly divided into five cavities by the current stabilizers 20, and the uppermost cavity and the lowermost cavity are respectively communicated with the return pipeline. Each flow stabilizing plate 20 is provided with a communicating cavity 21 and an overflow port 22, the communicating cavity 21 is columnar, the upper end of the communicating cavity is open, the lower end of the communicating cavity is communicated with a cavity below the communicating cavity through the corresponding flow stabilizing plate 20, so that air pressure communication between two adjacent cavities is realized, and the distillate is prevented from generating siphonage in the circulation process; the overflow port 22 is also cylindrical, the upper end of the overflow port is open, the lower end of the overflow port is communicated with a cavity below through the corresponding flow stabilizing plate 20, when the distillate is more, namely the flow rate in the pipeline is larger, the distillate is gradually accumulated in the cavity above the upper end of the overflow port 22, when the accumulated liquid level is higher than the upper end of the overflow port 22, the distillate enters into the cavity below and adjacent to the overflow port 22 through the overflow port 22, and it is noted that the upper end of the communication cavity 21 is higher than the upper end of the overflow port 22, so as to prevent the distillate from flowing into the next adjacent cavity from the communication cavity 21.

In the actual circulation process, a buffer area is formed by the cavity in the distance range from the cavity bottom in any cavity to the upper end of the overflow port 22, distillate entering the flow stabilizer 2 is buffered once when passing through the cavity with the flow stabilizer 20 at the cavity bottom, and therefore the condition that the distillate in the pipeline fluctuates due to the starting and stopping of the first electromagnetic valve 1 is eliminated.

A weir area 23 for reducing the flowing speed of the distillate is arranged on the annular end surface of the upper opening of the overflow port 22, and when the distillate in the cavity is gradually accumulated and just submerges the overflow port 22, the distillate can smoothly flow into the overflow port 22 instead of suddenly flowing into the overflow port due to the arrangement of the weir area 23, so that the fluctuation of the liquid level is caused.

There are also tear holes 24 in each of the flow stabilizers 20, and in this embodiment, there are preferably two tear holes 24, which are configured to allow flow through the tear holes 24 in the flow stabilizer 20 when there is less distillate.

The communicating cavities 21 and the overflow ports 22 in the two adjacent cavities are respectively arranged in a staggered manner, so that distillate flowing down from the overflow port 22 in the previous cavity is prevented from directly falling into the overflow port 22 in the next cavity. In this embodiment, it is preferable that a connecting line between the position of the communicating cavity 21 and the position of the overflow port 22 in the two adjacent cavities is perpendicular to each other.

A balance branch is communicated and arranged between a pipeline communicated with the flow stabilizer 2 and the first float flowmeter 3 in the return pipeline and a pipeline communicated with the flow stabilizer 2 and the second float flowmeter 8 in the production pipeline, a manual valve 9 is arranged on the balance branch, when the reflux starts, the same liquid level height exists in the flow regulators 2 in the reflux pipeline and the extraction pipeline, since the return line together with the distillation column and the distillate-collecting tank 7 to which the withdrawal line is connected are not directly connected, which results in that the liquid level in the two flow regulators 2 cannot be the same or takes a long time to be the same, therefore, the manual valve 9 is arranged in the technical scheme, when the backflow is started, the manual valve 9 is firstly opened, so that the distillate is mutually communicated, therefore, the same liquid level is quickly achieved, the consistency of the initial state is ensured, and then the manual valve 9 is closed to disconnect the return pipeline and the production pipeline to prevent the return pipeline and the production pipeline from influencing each other.

In the computer control system that the flow data that circulates in first float flowmeter 3 and the second float flowmeter 8 can all be fed back to, because the setting of current regulator 2, the distillate that circulates first float flowmeter 3 and circulates second float flowmeter 8 is continuous, it has realized the effect of a "discontinuous volume flow, continuous discharge", this just guarantees that the feedback signal that follow-up computer control system received all is the accurate signal of distillate that circulates all the time, through the comparison analysis to the signal, thereby the break-make of control first solenoid valve 1 and second solenoid valve 6, with this size of automatic control reflux ratio.

The second electromagnetic valve 6, the flow stabilizer 2 and the second float flowmeter 8 are sequentially communicated with the production pipeline, and the flow stabilizer 2 on the pipeline is the same as the flow stabilizer 2 on the return pipeline, so the details are not repeated.

The number of the cavities in the current stabilizer 2 may be plural, and four are preferably provided in the present embodiment.

Claims

1. An automatic continuous type reflux ratio controller which is characterized in that: comprises a return pipeline and a production pipeline; the return pipeline is sequentially communicated with a first control valve, a current stabilizer and a first float flowmeter; the extraction pipeline is sequentially communicated with a second control valve, a current stabilizer and a second float flowmeter;

a plurality of flow stabilizers are arranged in the flow stabilizer at intervals, and the flow stabilizers are divided into a plurality of cavities by the flow stabilizers; the flow stabilizing plate is provided with a communicating cavity for communicating two adjacent cavities of the flow stabilizing plate, the flow stabilizing plate is provided with an overflow port for circulating distillate, and the opening of the communicating cavity is higher than the opening of the overflow port;

2. An automatic continuous reflux ratio controller as claimed in claim 1, wherein: one end of the reflux pipeline is communicated with the top of the rectifying tower, and the other end of the reflux pipeline is communicated with an upper reflux opening of the rectifying tower; one end of the extraction pipeline is communicated with the top of the rectifying tower, and the other end of the extraction pipeline is communicated with a corresponding distillate collecting tank.

3. An automatic continuous reflux ratio controller as claimed in claim 2, wherein: the cavity bottom of the lowest cavity in the current stabilizer is consistent with the height of the reflux port.

4. An automatic continuous reflux ratio controller as claimed in claim 1, wherein: and a weir area for reducing the flowing speed of the distillate is arranged above the overflow port.

5. An automatic continuous reflux ratio controller as claimed in claim 1, wherein: the first control valve is a first electromagnetic valve; the second control valve is a second solenoid valve.

6. An automatic continuous reflux ratio controller as claimed in claim 1, wherein: and a pipeline between the current stabilizer and the first float flowmeter in the return pipeline is mutually communicated with a pipeline between the current stabilizer and the second float flowmeter in the production pipeline, and a manual valve is arranged on the mutually communicated pipelines.

7. An automatic continuous reflux ratio controller as claimed in claim 5, wherein: and the first electromagnetic valve, the second electromagnetic valve, the first floater flowmeter and the second floater flowmeter are in signal connection with the computer control system.