Method for dechlorinating gas discharged from continuous reforming regenerator

Abstract

The invention relates to a method for dechlorinating gas discharged from a continuous reforming regenerator, comprising the following steps: absorbing chloride in gas discharged from a coke-burning zone and an oxychlorination zone of the continuous reforming regenerator through a bed for catalyst to be regenerated and a bed for solid dechlorinating agent, wherein the bed for catalyst to be regenerated and the bed for solid dechlorinating agent are arranged between a gas-solid separator and a regenerator in sequence; eliminating one part of gas discharged from the bed for catalyst to be regenerated from a system, and returning the other part of the gas to the coke-burning zone of the continuous reforming regenerator; enabling gas discharged from a roasting zone of the continuous reforming regenerator to enter another dechlorinating pot filled with solid dechlorinating agent to absorb chloride therein and eliminating the gas from the system, wherein the solid dechlorinating agent comprises 50-88 percent of alkaline earth oxide by weight, 10-40 percent of alumina by weight and 2-30 percent of bentonite by weight. With the method for dechlorinating gas discharged from a continuous reforming regenerator, the gas discharged from the continuous reforming regenerator can be dechlorinated, and agent to be regenerated can absorb a certain amount of chlorine to reduce the amount of chlorine injected in the regeneration process.

Description

technical field [0001] The invention is a method for removing chlorides in the exhaust gas of a continuous reforming regenerator, specifically, a method for removing chlorides in the exhaust gas of a reforming regenerator by using a spent catalyst and a dechlorination agent. Background technique [0002] The continuous catalytic reforming of naphtha has the characteristics of high liquid yield, high hydrogen production and high yield of aromatics. It has received great attention in the production of high-octane gasoline and aromatics, and will be developed in the reforming process in the future. play a leading role in the process. The core of the continuous reforming process is the catalyst regeneration technology. The chloride concentration in the outlet gas of the regenerator is high. In order to meet the environmental protection control indicators, it needs to be purified before being discharged into the atmosphere. [0003] At present, the purification methods of the ou...

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Problems solved by technology

[0014] The method of the present invention dechlorinates and purifies the gas discharged from the continuous reforming regenerator, first uses the unborn reforming catalyst and dechlorination agent to absorb and remove chlorides from the gas discharged from the burnt area of ​​the regenerator, and simultaneously roasts the regenerator The gas discharged from the zone is also dechlorinated by a dechlorination agent to remove chlorides in the gas, which solves the problem of changes in the carbon content of the catalyst and the atmosphere of the regeneration cycle gas, as well as the decrease in the specific surface area of ​​the catalyst in the middle and late stages of use when only the standby agent is used to adsorb chlorides in the gas. The reason is that the ability to hold chlorine decreases, causing the chloride in the regeneration exhaust gas to fail to meet the requirements of environmental protection control indicators. It is also possible to recycle part of the chloride in the regeneration gas to reduce the amount of chloride injection outside the system during the catalyst regeneration process and reduce operating costs while increasing the stability of regenerator operations

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