The method of collecting cgp catalyst by tank car

Abstract

The invention relates to a method for collecting CGP catalysts through a tank car. The method includes the following steps that first, the catalysts are transported through the tank car, and namely the CGP catalysts are directly placed into the closed powder tank car and transported to a production field through the tank car; second, the tank car is pressurized through an air compressor, and namely the air compressor in the tank car is started, the tank car is pressurized through the air compressor, and the pressure in the tank car is made to reach 0.35MPa; third, a catalyst cooling tank and the tank car are connected, and the catalysts are conveyed into the catalyst cooling tank. Through the method, environmental pollution, catalyst loss and energy loss are reduced, labor cost is greatly lowered, labor intensity of workers is relieved, the catalyst collection time is shortened, and influences on device operation are reduced.

Description

technical field [0001] The invention relates to a method for collecting agent, in particular to a method for collecting CGP catalyst by using a tank car. Background technique [0002] In order to adapt to higher environmental protection requirements, my country began to implement the GB17930-1999 unleaded gasoline standard for vehicles with an olefin volume fraction of no more than 35% in January 2003. In order to welcome the 2008 Olympic Games, Beijing implemented Euro II emission standards in 2005, requiring the volume fraction of olefins in gasoline entering the Beijing market to be further reduced to below 18%. The pressure to upgrade the quality of gasoline is further increasing. At the same time, due to the strong growth in demand for propylene derivatives in recent years, the demand for propylene in both domestic and foreign markets has grown faster than that for ethylene. In order to meet the above challenges, the China Academy of Petrochemical Sciences developed th...

AI Technical Summary

Problems solved by technology

[0003] (1) Environmental pollution: when CGP catalyst is used, the volume fraction of catalyst with a particle size of less than 149 μm generally accounts for more than 90%, and the on-site dust pollution is relatively serious during the collection process;

[0004] (2) Loss problem: Catalyst dust loss will be caused during manual feeding to the hopper, and part of the catalyst will be carried out during the vacuuming process of the 1.0MPa steam on the top of the tank;

[0005] (3) Energy waste: Use 1.0MPa steam to evacuate to form a negative pressure to collect the agent. According to the actual operation experience, it takes 8-10 hours to collect 30 tons of catalyst, the steam consumption is 3t / h, and the catalyst consumes 0.6kg / t of raw materials , with an annual processing capacity of 1.25 million tons, 750 tons of catalysts are needed for the whole year, and 600-750 tons of steam are consumed for the whole year, resulting in waste of steam. At the same time, non-purified wind is needed for catalyst transportation, resulting in waste of energy;

[0006] (4) The labor intensity of workers is high: because the catalyst feeding room is high from the ground and the internal space is small, mechanical operation cannot be used, so unloading and feeding must be done manually, requiring a lot of labor;

[0007] (5) Operational impact: In order to keep the device operating smoothly, the device adopts an automatic catalyst dosing system. During the process of catalyst collection, the automatic dosing system needs to be stopped, thereby affecting the average amount of catalyst added, reducing the catalyst activity and the target yield of the device