SU1452602A1 - Arrangement for cleaning cyclone from sticking dust - Google Patents

Abstract

The invention relates to devices for cleaning cyclones from dust and can be used in the chemical, metallurgical, food and other industries. Using the invention will reduce the energy consumption for cleaning the cyclone from dust adhering to its walls. The device contains a vibrator 1 mounted on the exhaust pipe 2 of the cyclone 3, the converter 4 of the supply frequency, the sensor 5 of the pressure differential on the cyclone 3, the sensor 7 of vibration, block 6 of the search for extremum. Cyclone 3 is mounted on shock absorbers 14. 1 Il.

Description

 ijzfi

sd y

about

HS

- if

I The invention relates to the purification of particles suspended in them and can be used in the 6bit industry in the building materials industry, metallurgical, chemical, food and other industries of the national economy.

The aim of the invention is to reduce the energy consumption for cleaning the cyclone from sticking dust by achieving a resonant mode of vibration.

I The drawing shows a device for cleaning the cyclone from sticking dust.

I The device consists of a vibrator 1 mounted on the lid of the exhaust pipe 2 of the cyclone 3 and connected to the output of the frequency converter 4. To log nef

on

and the output of the cyclone 3 is connected to the pressure drop sensor 5, connected to the first

The input of the converter 4, to the second input of which, via the extremum search unit 6, is connected a vibration sensor 7 mounted on the cyclone body 3. The unit 6 through extremum includes devices 8 and 9 you have 5orki storage connected to them is also a generator 10, the comparison element 11, the control signal generating device 12 and the amplifier 13. The cyclone 3 is set to

spring shock absorbers 14.

The device works as follows.

Gas and dust flow enters the cyclone 3, where under the action of centrifugal forces, dust and gas are separated. Purified ha: - | enters the exhaust pipe 2, and the dust partially sticks to the internal) wall of the cyclone 3, partially passes into the dust collecting bin (not shown). During a certain time of operation, a layer of dust is growing on the walls, hydraulic resistance of the cyclone 3 age, which is detected by the differential sensor 5, which through the converter 4 turns on the vibrator 1 at the minimum frequency of rotation of its rotor to the converter 4. The cyclone body 3 begins to vibrate and the vibration sensor 7 outputs the magnitude of the amplitude to the input of the extremum search unit 6 - to one of the 8 or 9 sampling-storage devices in which the signal is stored for one cycle. With the help of the generator 10, a signal is fed to the device 8 or 9 of the sample-storage and their mutual shift in time by one period. In the comparison element 11, the received signals are compared and if the difference between the subsequent and previous signals is positive (at the first stage, the received signal is compared with the zero signal), the control signal generating device 12 through the amplifier 13 outputs a signal 5 to the converter 4 to increase the frequency supplying the vibrator 1. With an increase in the supply frequency, the amplitude of vibration of the cyclone 3 increases. The vibration sensor 7 outputs a new signal corresponding to the new amplitude to the input of the unit 6 extremum search and the cycle repeats. With the achievement of the resonant frequency, the amplitude of vibration of the cyclone 3 sharply increases, as well as the strength of

5 to the material layer, as a result of which the adhering dust is dumped into the dust collecting bin. After the material has been discharged, the vibrating cyclone 3 vanishes from the resonant mode, the vibration amplitude decreases, and the vibration sensor 7 outputs the corresponding signal to the extremum search unit 6. Since the received signal is less than the previous one (the difference is negative), the search unit of the extremum 6 through the converter 4 of the supply frequency produces a trip

25 vibrator 1. The magnitude of the resonant frequency at each turn on of the vibrator 1 may vary due to a change in the operating conditions of the cyclone (moisture fluctuation in the dusty gas, dust concentration in the stream being cleaned), which leads to a change in the properties of the layer of adhering dust (moisture, porosity, and therefore and the mass of adhered material).

35

Claims (1)

Invention Formula A device for cleaning a cyclone from sticking dust, containing a vibrator, characterized in that, in order to reduce the energy consumption for cleaning the cyclone from the presence of burning dust by achieving a resonant mode of vibration, it is equipped with an extremum detector located on the cyclone, a frequency converter, a sensor pressure drop on the cyclone, while the output of the differential pressure sensor 45 is connected to the first input of the frequency converter, to the second input of which the dates are connected via an extremum search unit IR vibration, and the output of the frequency converter is connected to the vibrator. Invention Formula