SU887558A1 - Method of liquid extraction process control - Google Patents

Description

a heat exchanger 7 in an optional column 5. The separation of non-hydrothermal hydrocarbons, the so-called raffinate, is withdrawn from the extraction column 2 but through the pipe 8. the so-called extract, which is removed from the ophthalmic coloin about the pipe 9. The common water through the pipeline 10 is supplied to the unit. According to the described method, this water note is divided into two streams. One of them, but pipeline 11, through heat exchanger 7, enters the extraction column 5, and the other, but pipeline 12 is fed directly into the pipeline with solvent. The costs of raw materials, water, and water, are appropriately measured by sensors 13, M, and 15. Copper, concentrating aromatic hydrocarbons in the raw material and in the reagent are measured by sensors 16 c. the raw material and in the recycler, which is placed in the computing unit 18, which, based on the incoming information, determines the total amount of aromatic hydrocarbons in the raw material and in the recycler, converts it into a proportional signal, as a reference p 19 the concentration of water in the solvent. The non-temporary regulator 19 also receives a discharge from the output of sensor 20 for the concentration of water in the solvent. The error signal from the output of the regulator 19 is received as a task in the water flow regulator 21, which also receives a signal from the sensor 15, which is proportional to the flow of water supplied to the installation. A mismatch control signal from the output of the controller 21 is supplied to the additional mechanisms 22 and 23 installed on the pipelines for supplying water to the stripping column 5 and mixing with the solvent supplied to the extraction column 2.

The error signal of the regulator 21 changes the water content to the stripping column 5 and in the solvent until its concentration in the solvent, as measured by sensor 20, is equal to the specified value. Thus, part of the water through the actuator 23 and the pipeline 3 immediately enters the solvent, restores its necessary concentration, and the solution’s usability of the solvent is reached almost instantaneously.

The use of the described method allows reducing the steam consumption for carrying out the process of liquid extraction.

Formula and 3 are enclosed

The method of liquid extraction extraction process, which consists in changing the flow rate of water in the Stripping column, depending on the total content

Aromatherapy hydrocarbons in the feedstock and the recycler, in order to reduce the consumption of steam, the water supplied to the stripper) about the column is divided into two streams; one stream is fed directly into the stripping column, the second one is mixed with the solvent coming from the Stripping column to the extraction one, and the flow rate of water in both these water flows varies depending on the concentration of water in the solvent coming from the Stripping column it with in.

Information sources,

taken into account in the examination

1. Collection “Extraction Extraction, L., Chemie, 1969, p. 330--324.

2. Authors certificate of the USSR | L 351561, cl. From 07 To 7/08, 1969 (irotogyp).

Claims (1)

The method of controlling the liquid extraction process, which consists in changing the flow rate of water to the stripper column depending on the total content of 25 aromatic hydrocarbons in the raw material and risicle, using the fact that, in order to reduce the consumption of steam, water fed to the stripper is divided into two streams; one stream is fed directly to the stripping column, the second is mixed with the solvent coming from the stripping column into the extraction column, while the water flow rate in both of these water flows varies depending on the concentration of water in the solvent coming from the stripping column into the extraction column, after mixing it with water.