Anti-blocking device of system for rectifying poly-methoxy dibutyl ether and method for refining same

Abstract

The invention discloses an anti-blocking device of a system for rectifying poly-methoxy dibutyl ether and a method for refining the same. The system comprises a rectifying tower, a reboiler, a condensation cooler, a reflux tank and a reflux pump which are sequentially communicated with one another. The reflux pump is communicated with the rectifying tower. The method includes (1), delivering to-be-separated mixtures into the rectifying tower from the middle of the rectifying tower, separating the to-be-separated mixtures under the conditions of the pressures ranging from -0.01 MPa to 1.0 MPa, the tower top temperatures ranging from 90 DEG C to 160 DEG C and the tower bottom temperatures ranging from 120 DEG C to 180 DEG C, extracting poly-methoxy dibutyl ether solution from a tower bottom and extracting mixture steam from a tower top; (2), allowing the mixture steam to flow into the condensation cooler from a material steam inlet, cooling the mixture steam at the temperatures ranging from 80 DEG C to 120 DEG C to obtain condensed liquid, then allowing the condensed liquid to flow into the reflux tank from a material liquid outlet, allowing a part of the condensed liquid to flow back into the rectifying tower to continue to be rectified and extracting portions which do not flow back to the rectifying tower from the system. The anti-blocking device and the method have the advantages that the problem of easiness in blocking equipment can be effectively solved, and the separation purity of the poly-methoxy dibutyl ether can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and in particular relates to an anti-blocking device and a refining method for a rectification system of polymethoxy dibutyl ether. Background technique [0002] my country joined the WTO at the end of 2001, and since 2002, diesel consumption has shown a momentum of rapid growth. Diesel consumption is increasing at an average annual rate of 8.3%. In 2012, the total consumption of diesel reached about 170 million tons, 2.3 times that of 2001. According to the forecast of relevant experts, the total diesel consumption in my country is expected to be 204 million tons in 2015, 221 million tons in 2020, and 280 million tons in 2030. Such a large demand for diesel oil has led to insufficient supply of diesel oil, and the import volume has increased year by year. At the same time, with the relative shortage of crude oil reserves, the processing of low-quality heavy oil industry continues t...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides an anti-blocking device and a refining method for polymethoxy dibutyl ether rectification system, which can effectively solve the problems of easy blockage of equipment pipelines and low separation efficiency

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