Adsorption desulfurization reaction device and adsorption desulfurization method

Abstract

The invention discloses an adsorption desulfurization reaction device, a fluidized bed reactor of the adsorption desulfurization reaction device is provided with a pneumatic particle sorting device which comprises a sorting device main body, a discharge port, a wind outlet pipe and a guide wind inlet; the interior space of the sorting device main body comprises, from top to bottom, a straight cylinder area and a pyramidal area, the discharge port is located at the bottom of the pyramidal area, the guide wind inlet is arranged, along the tangent direction of the straight cylinder area, on the upper part of the straight cylinder area, the wind outlet pipe is inserted into the sorting device main body in a sealing manner, and extends to the lower part of the straight cylinder area, the bottom end port of the wind outlet pipe is sealed, and a guide wind outlet is arranged, along the tangential direction, on the lower part of the wind outlet pipe. The invention also discloses an adsorption desulfurization method performed in the adsorption desulfurization reaction device. According to the adsorption desulfurization method, catalyst fine powder produced in an adsorption desulfurization process can be timely transferred out of the fluidized bed reactor; and in the separation and sorting process, the secondary damage rate of catalyst particles is low, so that the adsorption desulfurization method can obtain good and stable desulfurization effects.

Description

technical field [0001] The present invention relates to an adsorption desulfurization reaction device, and also relates to an adsorption desulfurization method using the above adsorption desulfurization reaction device. Background technique [0002] Petroleum hydrocarbons such as gasoline and diesel always contain some organic sulfur. These organic sulfurs release SO when burned x , the most important of which is sulfur dioxide (SO 2 ). Sulfur dioxide is the main pollution source of the atmospheric environment and the direct cause of acid rain. In order to control air pollution, countries successively put forward stricter restrictions on the sulfur content in gasoline through legislation. Europe, the United States and other countries and regions have proposed the "sulfur-free gasoline" standard with gasoline sulfur content ≯10μg / g. [0003] At present, there are mainly two methods for deep desulfurization of oil products: hydrorefining and adsorption desulfurization. Ho...

AI Technical Summary

Problems solved by technology

However, the metal filter has a small pore size and is mainly used to recover fine powder, while solid particles larger than 2 μm in the catalyst tend to remain in the reaction system, resulting in a large number of small catalyst fine particles that cannot be removed from the reactor in time. Desulfurization effect of the device

Moreover, with the accumulation of catalyst fine particles in the reaction system, the solid phase density of the catalyst bed is greatly reduced, which breaks the pressure balance in the reaction system, resulting in insufficient catalyst flow driving force, which cannot make the catalyst flow into the reaction receiver normally. , causing the catalyst to flow poorly and affecting the normal operation of the device

[0010] Compared with other solid catalysts, the mechanical strength of the catalyst for adsorption desulfurization is slightly lower. If a conventional cyclone separator is installed in the adsorption desulfurization reactor to separate the catalyst, due to the high flow rate of the gas flow in the cyclone separator, it is difficult to separate oil and gas. When contacting catalyst particles, the strong collision between particles and between particles and the wall of the cyclone separator can easily cause the catalyst to break

Moreover, the cyclone separator is a highly turbulent centrifugal force field, and the turbulence intensity of the large and small particles is different, which leads to serious entrainment of coarse and fine particles during the separation process, and the boundary definition of particle separation is limited, so it is impossible to separate the catalyst in the fluidized bed reactor into fine particles. The fine powder is effectively sorted out, and a large amount of catalyst is broken, resulting in more fine powder in the fluidized bed reactor and faster catalyst consumption

Images