Device and method for separating oil and water on top of debenzolization tower with excellent separation effect

Abstract

The present invention discloses a device and method for oil-water separation on the top of a debenzolization tower with excellent separation effect, and relates to the technical field of debenzolization of chemical production, and the device and method are used for improving the oil-water separation effect on the top of the debenzolization tower. The technical proposal is as follows: according tothe device and method, a plurality of liquid level gauges are adopted to display height of an oil-water separation interface of each part of a tank body, and the separation interface of an oil-water mixture in the tank body is controlled between a separation oil outlet and an oil-water mixture inlet through regulating control valves of different separated water outlets and different oil return ports, thus the oil-water separation effect is improved, it is ensured that separated oil does not carry water, and separated water does not carry oil, benzene oil is fully returned to the debenzolization tower, and the separated water is continuously discharged outside the debenzolization tower, debenzolization distillation operation is stabilized, the light benzene yield and quality are greatly improved, and significant economic benefits are achieved; and oil-water separation control operation is normalized and standardized, the operation efficiency is improved, the time for regulating oil-water separation to achieve optimal effect is effectively shortened, and safe and stable production of debenzolization distillation is ensured.

Description

technical field [0001] The invention relates to an oil-water separation device and method for improving the oil-water separation effect at the top of a benzene removal tower, and belongs to the technical field of benzene removal equipment and methods in chemical production. Background technique [0002] In the production process of debenzene distillation in chemical enterprises, coke oven gas is washed with oil and benzene to produce rich oil, and the rich oil is distilled in the debenzene tower to produce light benzene (or crude benzene). At this time, the top tray of the debenzene tower will be A large amount of mixture of steam condensed water and benzene oil is generated, and it is necessary to introduce an oil-water separation device for separation, and the condensed water should be discharged out of the tower in time to ensure the safe and stable production of the debenzene process. The traditional oil-water separator adopts a single separation water outlet and a singl...

AI Technical Summary

Problems solved by technology

The traditional oil-water separator adopts a single separation water outlet and a single oil return outlet. The body of the oil-water separator is not equipped with a liquid level gauge, so that the oil-water separation interface cannot be well observed and regulated, resulting in poor oil-water separation effect and separation water bands The state of oil and separated oil with water, this situation will inevitably cause large fluctuations in the top temperature and pressure of the debenzene tower, disturb the normal production in the debenzene tower, seriously affect the debenzene effect, and restrict the quality of light benzene (or crude benzene) and its yield increase

At the same time, if the condensed water in the tower cannot be discharged out of the tower in time, there will be production accidents where oil and water hit the tower body, which is not conducive to the improvement of the quality and efficiency of coking enterprise products and the safe and stable production

So far, the control method using the traditional oil-water separation device has not been improved, and it is not suitable for the production and development of the enterprise. It is necessary to adopt a new process control method to improve the separation effect of the condensed water and the benzene oil mixture, so that the debenzene tower The generated steam condensate and benzene-oil mixture are completely separated, so that the separated oil without water is completely recycled into the tower, and the separated water without oil is continuously discharged out of the tower to ensure safe, stable and efficient production of the debenzene tower

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