3results about How to "Fluidized state is good" patented technology

The invention provides a fluidized bed granulation process and device for online regulation and control of particle size and moisture of particles, and belongs to the technical field of fluidized bed granulation. The fluidized bed granulation process specifically comprises the following steps: firstly, presetting a material target particle size, a material control temperature and a minimum material temperature, adopting a four-stage granulation process, and realizing online regulation and control on the material particle size and moisture by controlling the air inlet volume and the air inlet temperature; the process is realized by installing an anemograph behind an air inlet valve on an air inlet pipe of an existing fluidized bed granulation drying device, installing a near-infrared probe on a material tank window and installing a temperature probe in the middle, the transformation difficulty is small, air volume and temperature control in the whole granulation process can be achieved, and online monitoring of the particle size and moisture of particles in the whole process can be achieved. The obtained products are small in batch difference and good in reproducibility, the stability of the product quality is further guaranteed, the purpose of saving energy can be achieved by monitoring the air inlet volume and the temperature, and the method is suitable for actual production.

The invention discloses a fluidized bed reactor for naphtha production, and belongs to the field of naphtha reforming, the fluidized bed reactor for naphtha production comprises a reactor main body and a reaction cavity formed in the reactor main body, and the lower end of the reactor main body is connected with a gas inlet assembly; the gas inlet assembly comprises a bottom plate fixedly connected to the lower end of the reactor main body and a gas outlet distribution disc located above the bottom plate and rotationally connected with the inner wall of the reactor main body, an output port is formed in the reactor main body, and the output port is communicated with the input end of the cyclone separator; the catalytic activity can be recovered under the condition that production is not stopped, downtime is shortened, production continuity is improved, meanwhile, catalyst particles in the fluidized bed reactor are in a fluidized state, contact between gas and the catalyst is very uniform, reaction temperature distribution is more uniform, the local overheating phenomenon is reduced, and production efficiency is improved. High reaction efficiency can be maintained, and the risk of coke accumulation is reduced.

This invention discloses a fixed-fluidized bed reactor for multiphase catalytic reactions. "Fixed" refers to fixing a hollow support material within the reactor, while "fluidized" refers to the process where, after gaseous or liquid feedstocks are introduced into the hollow porous material cavity, the catalyst encapsulated within the cavity is subjected to buoyancy by the gas and liquid phases, resulting in a regional fluidized state within the cavity. The fixed-fluidized bed reactor comprises, from bottom to top, a feedstock inlet, a catalyst filling inlet, and a reaction outlet inlet, with a circulation inlet and an auxiliary control inlet at the side. The gaseous, liquid, or gas-liquid mixed feedstocks contact the hollow porous material through the connecting holes on the grid plate and then enter the cavity through the pores on the material surface. The catalyst powder filled inside is fluidized within the cavity under the disturbance of the gaseous, liquid, or gas-liquid mixed phases. An external magnetic field or microwave can further promote the fluidization of the catalyst powder, increasing the collision probability between the reactants and the catalyst powder, thereby improving catalytic efficiency.