Method for starting technological process of slurry bed reactor

Abstract

The invention discloses a method for starting the technological process of a slurry bed reactor. The method comprises the following steps of: (1) preparing; (2) detecting the air tightness of a starting operation system of the slurry bed reactor; (3) starting a main circulation compressor, and establishing air circulation of the starting operation system of the slurry bed reactor; (4) testing the blowing and differential pressure of a distributor; (5) exchanging the nitrogen of the starting operation system of the slurry bed reactor; (6) establishing water circulation of the starting operation system of the slurry bed reactor; (7) releasing the pressure and introducing heavy diesel and residue wax; and (8) boosting the pressure of the starting operation system of the slurry bed reactor; and the like. The method has the advantages that the benefit of the slurry bed reactor is maximized; carbon deposition of the surface of a filtering tube caused by burned catalyst can be avoided, so that the service life of the filtering tube is greatly prolonged, and the repairing and maintenance cost of the equipment is reduced; the problem that the distributor is blocked due to the fact that the hydrogen circulation time is not sufficient or the circulation quantity is low is avoided; the long-term stable operation is ensured; and the production efficiency is greatly improved.

Description

Technical field: [0001] The invention relates to a start-up method of a process flow, in particular to a start-up method of a slurry bed reactor process flow. Background technique: [0002] At present, the operating temperature of the slurry bed reactor is controlled at 265°C, and the full load of the designed device is 125,000NM 3 / H. However, during operation, it is found that when the temperature is 265°C, the device load is 115000-118000NM 3 / H or so, can not reach full load. And the calculated value of the reaction conversion rate is more than 92%, and the actual conversion rate is about 83-85%, which fails to reach the design target. [0003] On the other hand, the wax is filtered through the built-in filter tube in the slurry bed reactor to ensure the liquid level of the slurry bed reactor. Therefore, the level of the liquid level can be adjusted by adjusting the number of filter tubes. The filter tube is composed of a mesh with a skeleton and a pore diameter smal...

AI Technical Summary

Problems solved by technology

Before the liquid level is specified, the liquid level of the slurry bed reactor should be controlled as low as possible, which is conducive to the catalyst being carried by the gas phase at the outlet of the reactor, but this will easily cause a large amount of carbon deposits on the surface of the filter tube, and the filtering effect will become worse and worse.

[0004] The hydrogen circulation time and circulation volume are determined by the experience of operating workers, and there is no fixed standard. Therefore, it often occurs that part of the catalyst settles due to low circulation volume, resulting in partial blockage of the distributor.