SU1646583A1 - Gas cleaning apparatus - Google Patents

Abstract

The invention relates to an apparatus for the purification of gases from solid and gaseous impurities and can be used in the chemical, metallurgical and other sectors of the national economy. The purpose of the invention is a uniform distribution of the gas flow before the filtering device and removal of the spent granular material. The apparatus includes a housing in which a sorbation unit with fluidization of the sorbent is located in the lower part, and a filtering unit in the upper part, made in the form of granular filter partitions. In the middle part of the apparatus is equipped with a louvered conical bunker, in the lower part of which there are provided nozzles for unloading the captured sorbent and taking out the spent granular material for regeneration. 2 Il.

Description

The invention relates to an apparatus for the purification of gases from solid and gaseous impurities and can be used in the chemical, metallurgical and other sectors of the national economy.

The purpose of the invention is to evenly distribute the gas flow upstream of the filtering device and to discharge the spent granular material.

Figure 1 shows the apparatus, a general view; figure 2 shows the lower part of the apparatus (sections A-AiB-Bna of figure 1).

The apparatus includes a housing 1 in which a filtering device 2 is located in the upper part, in the middle is a conical fiber bunker 3, and in the lower part is an absorption unit 4 with a pipe 5 for supplying contaminated gas, a switchgear 6. grids 7 for creating a fluidized bed sorbent and spent sorbent bunker 8.

The purified gas is removed from the pipes 9, on which the butterfly valves 10 and the manifold 11 are installed.

The filter device 2 has a hopper 12 for regenerated granular material, above which a separation chamber 13 is placed, granular filter partitions 14 formed by gas-tight partitions 15, plates 16. attached pivotally to the walls of the body 1 and to the chambers 18, and guide peaks 19. Drive The vibrations of the plates 16 through ti gi 18 can serve as electromagnets or pneumatic cylinders.

The louvered conical hopper 3 has in the lower part a pipe 20 for discharging the sorbent from the bunker 30 and a pipe 21 for removing the spent granular material from the apparatus. The nozzle 20 is provided with a shutter 22, driven locking mechanism 24 fastened on the bracket 23.

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Further downstream of the granular material from the pipe 21, there are: a lock feeder 25, a vibrating screen 26 provided with a cover 27, a pipeline 28, a sorbent hopper 29 and a bunker 30 of granular material. In order to transport the particulate material from the vibrating screen 26, a nozzle 31 is provided for supplying compressed air, an ejector 32 and a conduit 33 for transporting the granular material. In addition, there is a conduit 34 for draining exhaust gas and dust from the separation chamber 13. To load the sorbent, a manhole 35 is provided in the lower part of the apparatus.

The device works as follows.

The contaminated gas through pipe 5 is supplied to the gas distribution device 6, to the annular supply manifold 36, from which gas is supplied through a system of evenly distributed rectangular windows 37 to the hopper 8, and from it through the openings of the lattice 7 enters the fluidized bed of the sorbent. The gas distribution device b serves to arrange a uniform distribution of the gas flow over the cross section of the fluidized bed. In the fluidized bed of the sorbent, purification from harmful gaseous impurities occurs. The sorbent is periodically loaded into the lower part of the apparatus through the hatch 35, and is unloaded using a pivoting device (shaft 38 rigidly connected to the distribution grid 7) driven by, for example, an electric motor.

The dust found in the contaminated gas and captured by the latter itself is a small part of the sorbent through the louvered bunker 3 is transferred by gas to the granular filter partitions 14. The function of the silage bin 3 is to create a uniform gas flow before the granular filter partitions 14 while transporting the dusty granular material in the vibrating screen 26.

If the regeneration of the granular filter walls 14, i.e. the most dusty frontal layer of granular material is discharged by vibration of the swivel louvers after a period of more than an hour (the gas is slightly dusty), then through the pipe 20 the large part of the sorbent deposited in the louver 19 can be returned to the lower part of the apparatus when the airlock 25 is stopped using a locking the mechanism 24, resting on the bracket 23 through the bolt 22

Trapped in granular filter partitions 14 dust and sorbent together with the most dusty granular material of the frontal layer with shutters closed

10 at the moments of regeneration, are discharged into the pipe 21 through the louver bin 19. Then the lock feeder 25 is turned on and the material is transported to a vibrating screen, after which the dust along with the enthusiastic

the sorbent is collected in the bunker 29, and the granular material is collected in the bunker 30. The dust together with the enthusiastic sorbent is a product to be disposed of or regenerated by known methods. The granular material from the hopper 30 is transported by the compressed air supplied through the nozzle 31 and the ejector 32 via pipeline 33. The dust left behind after the vibrating screen in the granular material is transferred through pipeline 33

compressed air into suspension. The dust rising above the vibrating screen during screening passes through the shelter 27 into the pipeline 28. The cleaning apparatus is intended to be operated under vacuum. Since the pressure in the area of the granular filter walls is negative with respect to the atmosphere, under the action of the pressure difference, the dust spray from the shelter 2 through Tpv6onpoeofl 28

transported in the overflow space by granular filter partitions, after which it is captured last.

Through conduit 33, the granular material and the suspended dust are transported to the gas separation chamber 13. The latter is needed to further purify the regenerated granular material from

dust when it falls from the mouth of the pipeline 33 onto an inclined plate and further onto the material layer in the hopper 12. Cleaning is performed by air flow, initiated by the pressure difference between the separation

chamber 13 and the space of the louver bin 3. The pressure difference arises because the pressure in relation to the atmosphere in the louver bin 3 is negative (the device is designed to operate

under vacuum), while in the separation chamber 13 is positive, since compressed air is supplied to the nozzle 31. An aerosol entrained by the flow of a co-powder from the separation chamber 13 of the dust is transported via conduit 28 to a space in front of the granular filter partitions in which it is trapped.

The purified gas from the purified gas nozzles 9 through the flaps 10 enters the collector 11, from where it is emitted through a trap device (for example, a fan) into the atmosphere.

The cleaning efficiency in the proposed apparatus increases due to the fact that a fluidized bed of the sorbent is used to trap harmful gaseous impurities, while filtration through granular partitions is used to trap dust. At the same time, the louver bin 3 serves the purpose of combining the two stages of cleaning in one unit while achieving maximum overall compactness.

Claims (1)

Apparatus of the Invention A gas cleaning apparatus comprising a housing with process nozzles containing sorption and filtering devices, characterized in that, in order to evenly distribute the gas flow in front of the filtration device, the apparatus in the middle part is equipped with a louvered conical bunker, in the lower part which provides nozzles for unloading the sorbent and output of granular material, and the filtering device is made in the form of granular filter partitions. 13 Yu nineteen 34 Aa Phage 2 6-6