Water distribution system for tower-type fluidized bed reactor

Abstract

The invention discloses a water distribution system for a tower type fluidized bed reactor, comprising a fluidized bed reactor body, a water distribution system and a backflow system. A supporting plate is arranged at the lower part of the fluidized bed reactor body, and the interior of the fluidized bed reactor body is divided into an upper fluidization area and a bottom water distribution area by the supporting plate. A plurality of water distributors which are uniformly arranged at intervals are mounted on the supporting plate, each water distributor comprises a water distributor water inlet pipe and a water distributor head which are integrally formed, the water distributor water inlet pipes are located in the water distribution area, and the water distributor heads are located in thefluidization area. A backflow water outlet groove is formed in the top of the fluidized bed reactor body and communicated with the water distribution system through the backflow system. Inlet water ofthe fluidized bed system and added chemicals of the fluidized bed system are conveyed to the water distribution area through the backflow system to be mixed and then enter the fluidization area through the water distributors after being evenly mixed, and the water distribution system is even in water distribution, not prone to blockage and capable of adapting to fluidized beds of various diameters.

Description

technical field [0001] The invention relates to a water distribution system for a tower fluidized bed reactor. Background technique [0002] When the velocity of the fluid passing through the particle bed is gradually increased to a certain value, the particles are all suspended in the fluid, but they still stay in the bed and are not carried out by the fluid. This state of the bed is similar to that of a liquid. This type of reaction The device is called a fluidized bed. The solid particles in the fluidized bed reactor are suspended in the moving fluid, so that the particles have some apparent characteristics of the fluid, and have the characteristics of high mass transfer rate and fast reaction speed. Tower fluidized beds are widely used in the field of wastewater treatment. [0003] As a key component in the fluidized bed reactor, the distributor structure has the functions of water distribution and mixing, which has an important impact on the mass transfer and operatin...

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Problems solved by technology

However, the pipe distributor requires a large water head and high energy consumption. The carrier around the distributor is difficult to hang film, which intensifies the stratification of the carrier in the bed and affects the mixing of the solid and liquid phases; at the same time, the carrier is still easy to Problems with access to perforated pipes, difficulties with reactor start-up

Nozzle distributors can be used in large fluidized beds, but it is very difficult to construct a completely conical reactor in practice, so there are many dead zones in practical applications. When the diameter of the reactor is large, the water distribution will be uneven. At the same time, It is not easy to separate the carrier, and it is troublesome when the carrier needs to be replaced

[0005] Other types of distributors currently used in the market are basically improved on the basis of these three types of water distributors, but the application effects are not very good, such as multi-point water distributors, there is still no good effect. Solve the problem of clogging and carrier leakage; the linear water distributor has poor water distribution uniformity in the vertical direction of the pipeline, which requires high production and processing precision; the surface water distributor can effectively solve the problem of clogging, but the water distribution surface is large. As a result, the pressure of the distribution outlet is low and the momentum is not enough, which will cause uneven mixing

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