CS270086B1 - Apparatus for uniformly distributing fluid flow in a fluidized bed reactor - Google Patents

Abstract

The device consists of a distribution vessel /1/ located below the fluid reactor /2/, provided with a supply /11/ of the purified liquid. An inlet rectifier /12/ is located on the supply /11/ of the purified liquid and the distribution vessel /1/ is further provided with a damping grid /13/. In the upper part of the distribution vessel /1/ there is a system of evenly spaced rectifier tubes /14/ extending into the fluidization space /21/ of the fluid reactor /2/. The rectifier tubes /14/ are provided with countercurrently arranged caps /15/ with vent holes /151/. The device, by multiplying combined "rectification" of the purified liquid flow, solves the problem of uniform distribution of the liquid supplied for purification to the fluid reactor and ensures with high efficiency the uniformity of the fluidized layer of carrier material in the fluid reactor.

Description

CS 270 086 B1 1

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for uniformly distributing liquid flow in a fluidized bed suitable for biological treatment of waste and treatment of surface or groundwater. In the biological treatment of waste and treatment of surface or subterranean leaders, the use of a fluidized bed medium guaranteeing intensive solid-liquid contact and increasing the economy of the purification process is increasingly used. The cleaning process is carried out in fluidized bed reactors.

One of the main parts of the fluidized bed reactor is a device for distributing the flow of purified liquid, the task of which is to divide the velocity. the flow of the material into the confined layer of the material was the same in each section of the cross-section. Otherwise, there would be so-called non-internal fluidization and thus a high abrasion of the carrier particles. Increased abrasion prevents even growth of biomass, which is a prerequisite for successful use of this method in bio-purification processes. At present, the problem of uniform distribution of liquid flow is solved in various ways. Simple - for example by dividing the flow with grates (perforated metal, gravel layer), which are not suitable for use in biological processes because they are overgrown with biomass and thus suppress their function.

Various inlet structures are also known (described, for example, in U.S. Pat. No. 4,412,003, V. Brit. Pat. No. 2,021,668, European Patent Application No. 0 145612) which are combined with dense wedge-shaped, investment-high demanding structures. Their complexity implies the need for bridging high hydraulic resistance, which in turn increases the demands on the pumping equipment and thus increases the energy performance of the equipment. Another disadvantage lies in the location of the distribution elements themselves located below the inlet tubes, which in such an arrangement present an obstacle to the already distributed flow.

It has now been found that the disadvantages of the solutions described are largely eliminated by the device for uniformly distributing the liquid flow in the fluidized bed reactor for the treatment of waste streams and the treatment of surface or underground water according to the invention. The device consists of a distribution vessel located below the fluidized bed reactor equipped with a clean liquid inlet and flow rectifiers.

The essence of the invention is that an inlet rectifier is placed on the bottom of the distribution vessel on the supply liquid. The distribution vessel is further provided with a grating. In the upper part of the distribution vessel is a system of evenly spaced guide tubes extending into the fluidization space of the fluidized bed reactor. Tubes fitted with counter-current caps with vent holes.

The high uniformity of the distribution of the liquid supplied for purification in the apparatus of the invention is achieved by multiplying it by the combined flow control at the inlet to the distribution vessel on the baffle and through the baffle tubes provided with countercurrently arranged plugs. The device according to the invention thus provides a perfect flow distribution and thus a high uniformity of the fluidized layer of the carrier material.

The device according to the invention can be used for distributing liquid flow in reactors where activated sludge flakes are used as carrier material.

1 is a schematic cross-sectional view of a device for uniformly distributing fluid flow in a fluidized bed reactor.

Under the schematic fluidized-bed reactor 2, a distribution vessel 11 is provided, which is provided by the inlet 11 of the cleaned liquid. An inlet rectifier 12 is disposed at the inlet 11. The distribution vessel 1 is further provided with a damping grid 13. At the top of the distribution vessel 1 there is a system of uniformly distributed baffle tubes 14 extending into the fluidization space 21 of the fluidized bed reactor. 14 are provided with countercurrently arranged caps 15 with vent holes 151.

Claims (1)

OBJECT OF THE INVENTION Device for uniform distribution of liquid flow in a fluidized bed reactor suitable for biological waste treatment and surface or underground water treatment, consisting of a distribution vessel located below the fluidized bed reactor, equipped with a supply of purified liquid and inlet distributors, characterized in that in the lower part of the distribution vessel / 1 / an inlet rectifier / 12 / is located on the inlet / 11 / of the purified liquid and the distribution vessel / 1 / is further provided with a damping grid / 13 / and in the upper part a system of evenly distributed rectifier tubes / 14 / extending into the fluidization space / 21 / of the fluidized bed reactor / 2. / provided with countercurrent caps / 15 / with vent holes / 151 /.