Device for preparing metal capture agent

Abstract

The invention relates to the field of metal capture agent preparation, and discloses a device for preparing a metal capture agent. The device comprises a gel forming kettle, a spray drying tower, a roasting furnace, a gas-solid separation unit, a negative pressure unit, a storage tank and a pneumatic conveying unit, wherein the gel forming kettle is connected with the spraying drying tower; the spraying drying tower is connected with the roasting furnace; the roasting furnace is sequentially connected with the gas-solid separation unit and the negative pressure unit; through the negative pressure generated by the negative pressure unit, materials from the roasting furnace are fed into the gas-solid separation unit for gas-solid separation; the storage tank is connected with the gas-solid separation unit and is used for storing solid separated from the gas-solid separation unit; the pneumatic conveying unit is connected with the storage tank and is used for conveying the solid stored inthe storage tank. By using the device for preparing the metal capture agent, the energy consumption can be reduced; the yield is improved.

Description

technical field [0001] The invention relates to a metal trapping agent, in particular to a device for preparing the metal trapping agent. Background technique [0002] The continuous rise of crude oil prices has greatly increased the processing costs of refineries. At present, catalytic cracking is an important means of heavy oil processing in refineries. In order to reduce costs and maximize benefits, heavy oil can be processed through deep processing and low-quality oil. to fulfill. [0003] However, low-quality crude oils are generally higher in heavy metals such as vanadium. The vanadium-containing compounds in petroleum are a kind of very complex metal complexes, which generally exist in the form of porphyrinic vanadium and non-porphyrinic vanadium. The boiling point of metalloporphyrin is generally between 565-650°C, and it is mainly concentrated in residual oil, but because of its strong volatility, it will also enter the catalytic cracking fraction. Non-porphyrin ...

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Problems solved by technology

[0004] At present, the production process of metal trapping agent is usually: gelling in the gelling tank - spray drying the slurry in the spray drying tower - roasting the spray dried material in the roasting furnace - roasting the roasted The material is beaten in the beating tank-filtered in the slurry filter-air-dried the filter cake in the drying tower-finished product packaging. This process and equipment are relatively complicated, resulting in increased water consumption and natural gas consumption of metal collectors. At the same time , part of the product is lost with the filtrate during the filtration process, resulting in a low product yield

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