SU902793A1 - Unit for cleaning gases from dust - Google Patents

Description

(54) INSTALLATION FOR CLEANING GAS FROM DUST

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The invention relates to the purification of industrial gases from dust, in particular to the purification of granular filters, and can be applied in plants where the purification of exhaust gases is possible and expedient using granular filters, for example, dolomite combines for rotating dolomite .

A known device for cleaning gases from dust, comprising a filtering chamber, made of gas-permeable partitions, between which time, there is a batch of granular material, and an inertial dust chamber with a discharge bin LI.

The disadvantages of this design are the high speed of clogging of the granular filter with dust due to its continuous accumulation in the pores of the filter material and the complexity of its regeneration.

The purpose of the invention is to reduce the dust load on the filter chamber.

and increasing the degree of gas purification due to the additional stage of purification.

This is achieved by the fact that a gas cleaning unit for dust removal, including a filter chamber made of gas-permeable partitions between which the granular material is placed, and an inertial dust chamber with a discharge bin, is provided with a drum with shelves mounted obliquely mounted rotation around the axis and placed between the filter and dust chambers. It is advisable to provide a drum nozzle

IS installed at the end, when fc is kicking to the filter chamber.

Figure 1 shows schematically an installation for cleaning dust from gases, a general view; figure 2 - section aa on

20 figure 1; on fig.Z - section along BB in figure 1; in fig. - node I in figure 1.

The installation includes a dust inertial chamber 1 with a discharge bun390

a core 2 for spent filter media, an inclined rotating drum 3 with shelves 4 located on the inner surface of the drum 3, and a nozzle 5 located in the upper end of the drum 3 adjacent to the filter chamber 6, with gas-permeable baffles 7 located inside the chamber 6, transition 8 with . double walls from chamber 6 to drum 3 labyrinth seals 9 bunker 10 for clean filter material, closures 11, pipe 12 for the entry of dusty gas, pipe 13 for the cleaned gas, roof 14 of camera 6 that guides the filter material from the hopper 10 into between partitions 7.

As a filter material can be used various granular material, depending on the gas to be purified. For example, when cleaning off exhaust gases from dolomite kilns, limestone, crushed stone of certain fractions can be used as a granular filtering material.

The installation works as follows.

Dust gas to be purified through pipe 12 enters the dust chamber 1, 3 of which gas is cleaned from the largest fractions of dust falling in the chamber due to a sharp turn of the dusty gas stream and a decrease in the velocity of the latter in the chamber. Next, the dusty gas to be purified enters the drum 3 where it passes through the curtain of freely falling grains of filter material covered with a film of a viscous liquid. Dust particles in collisions with grains adhere to them.

The curtain is formed in a rotating drum 3 which, with its shelves 4, located along the entire inner surface of the drum, captures the filtering material in the lower part of the drum, moves it upward and then drops it downwards. Thus, along the entire length of the drum, a continuous curtain of freely falling grains of filter material is created, which enters the drum 3 from a chamber 6 above it with partitions 7 between which continuously granular filter material moves, coming from

four

located above the bunker 10 through the gate 11.

In order to avoid re-entrainment of dust collected by this moving layer

filter, and for direct gas cleaning from dust in a rotating drum, the filter material grains at the beginning of movement in the drum are covered with a viscous liquid from the nozzle 5. The gas flow from the rotating drum also has a turbulent movement pattern, which facilitates better dust collection. Speed

the gas should be high, on the order of 5-10 m / s, but lower than the critical one, at which the entrainment of grains of filter material or droplets of a viscous liquid.

During the rotation of the drum 3, there is a repeated rise and fall of the grains of the filter material, as well as its continuous mixing and particles of collected dust. The entire mass moves downward along the drum at a pressure opposite to the flow of gas to be purified, from drum 3 enters the hopper 2 of the dust chamber 1, from where it is removed as needed through the shutter 11.

The final cleaning of the dusty gas occurs in a layer of granular material that continuously moves between partitions 7. Dust collection occurs due to inertial forces, and it occurs in the form of inertial forces, gravitation and diffusion of particles. The degree of gas purification reaches 99.91.

1. Installation for cleaning gases from dust, comprising a filter chamber made of gas-proof x partitions between which the granular material is placed, and an inertial dust chamber with a discharge hopper, characterized in that, in order to reduce the dust load on the filter chamber and increase the degree gas cleaning at the additional cleaning stage; it is equipped with a fixed drum, -1 and on its internal nosepxHocrs. shelves mounted obliquely with the chozmo. of rotation around the m p axis of the swJUiCriHbiM between the filter and the left omer. 5902793 2. Installation according to claim 1, with the fact that the drum is equipped with a nozzle installed at the end adjacent to the filter chamber, Cl, Phi 1 ptruo l A f amepucr / D ffvvuieffnt fi / A “Sources of information that are taken into account during the examination 1. PnP NR If 68825 50e, C / O, 1973 jn foemtt

Claims (1)

Claim 1. Installation for cleaning gases from dust, including a filter chamber made of gas-permeable partitions, between which granular material is placed, and an inertial dust chamber with an unloading hopper, characterized in that, “p, in order to reduce the dust load on the filter chamber and increase the degree of gas purification by an additional purification stage, it is provided with a fixed drum on its inner surface ^ss shelves obliquely mounted rotatably about an axis and disposed between the filter -.amerami dust .. W y Installation on π. 1, due to the fact that the drum is equipped with a nozzle mounted on a filter chamber adjacent to it.