SU1368008A1 - Vibroscrubber for cleaning gas and air mixtures - Google Patents

Abstract

This invention relates to the purification of industrial air emissions. The goal is to increase trapping efficiency over a wide range of speeds by creating a uniform vibro-drip layer. The goal has been achieved by the design of the reaction column 2 of the vibrating scrubber, which is shaped like a column with a truncated cone 4 bottom, whose inlet section is blocked by an annular diaphragm 5. Vertical vibrating discharges the irrigation suspension from the inclined walls into the inlet section, the diaphragm turbulizes flows and A vibro-kicking layer is created in the vibro-scrubber on the contact phase, effectively trapping aerosol particles and gaseous impurities. 1 tab., 1 Il. & Dusty gas 6 / w / s mixture

Description

The invention relates to the field of purification of gas emissions,

The purpose of the invention is to increase the trapping efficiency over a wide range of speeds by creating a uniform vibro-kip layer.

The drawing shows the proposed vibroscrubber, cut.

The vibroscrubber contains a housing 1. The reaction column 2, designed to contact the gas-air mixture with the irrigation suspension coming from the nozzles.3, is made in its lower part as a truncated inverse truncated cone 4 with a diaphragm 5, in the form of a ring placed in a smaller base of a truncated cone 4 The reaction column 2 is hermetically mounted into the liquid receiver 6 with the gas injection flow inlet 7. The reaction column is said to be vibrated by a remote vibrator 8 rigidly attached, for example, to the bottom of the liquid receiver 6.

 The device also contains a gas-air flow outlet pipe 9, a suspension outlet pipe 10, and flexible elastic joints 11, which protect the gas ducts from harmful vibration effects.

Vibration scrubber works as follows.

The dusty gas-air mixture through pipe 7 enters the reaction column 2 with the lower part in the form of a truncated back cone 4 with an annular diaphragm 5 5 mm wide (which constitutes 6-8% of the lower diameter of the truncated cone) to turbulize the flow. A slurry suspension from nozzles 3, mainly along the walls of the chamber, moves towards it. The vibrator 8 communicates the vertical vibration of the conical walls and the diaphragm, which eject the suspension, blocking the flow area of the diaphragm with liquid. In this way, a foam layer is created in the conical part. In the cylindrical part, the speed drops. Suspension flows out. through pipe 10. The purified gas-air mixture leaves through pipe 9.

The presence of a diaphragm located in the lower base of the truncated cone leads to the flow turbulization, due to which a vibro-cycling layer with a developed phase contact surface is created.

The width of the diaphragm ring is 6 to 8% of the lower diameter of the truncated cone of the column; the internal opening angle of the truncated cone, which facilitates dropping the suspension into the flow section, is 50 to 60 °.

A ring width of less than 6% and an opening angle of less than 50. do not provide sufficient turbulence in the flow and create an optimal fluidized gas-liquid layer. A width of more than 8% and an opening angle of more than 60 form undesirable stagnant zones with drift deposition without increasing capture efficiency.

The table shows the rationale for choosing the optimal values.

50-60 and L 6 - 8 mm (or 6 b% of the diameter) to create an effective vibratory drip layer.

To ensure the normal operation of the apparatus and create a vibratory

It is important to sustain the parameters.

The velocity of the gas-air flow at the entrance to the truncated body through the diaphragm (with a through hole with diameter dц) is 3-8 m / s. Speed is lower

3 m / s does not provide a vibropic layer with a developed phase contact surface. A speed above 8 m / s results in choking.

Air flow rate in

the cylindrical part (diameter, d) is no more than 2 m / s — at higher speeds, drift is observed. Irrigation density of 3-10 l / m air-gas mixture. Choice of irrigation density in

This interval is explained by the same reasons as the speed.

Vibrations in the range of 16 - 25 Hz with an amplitude of .2-5 mm. Lower

Frequency and amplitude do not provide the required fluidized bed. A higher frequency leads to an excessively high resistance, a higher amplitude contributes to this and further complicates the design of the device. Experiments show that d is limited. Approximately he should

be no more than 0.5 m. Therefore, the maximum capacity of the scrubber for the gas-air mixture to be purified is no more than 3.5 thousand m / h, which is sufficient for its industrial use.

Claims (1)

Invention Formula A vibroscrubber for cleaning gazbg air mixtures, including a housing, the reaction column of which is made in the lower part in the form of a truncated backward cone, nozzles, a nozzle for input and. outputting the gas-air flow, a vibrator, characterized in that, in order to increase the capture efficiency in a wide range of speeds by creating a uniform vibrococci layer, it is equipped with a diaphragm in the form of a ring placed in a smaller base of a truncated cone, and the vibrator is rigidly connected to the body In this case, the angle of opening of the truncated cone is 50-60 °, and the width of the diaphragm ring 6 is 8% of the smaller diameter of the truncated cone of the housing. ABOUT four 15 20 thirty 40 Note. The diameter of the lower entrance cross section of a truncated cone is 100 mm. Dustiness of the gas-air flow is 2 g / m. Compiled by E. Kalantar N. Editor N. Tupitsa Tekhred L. Serdyukova Proofreader i. Erdei Order 131/7 Circulation 642Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5