SU1080871A1 - Apparatus for controlling electric wave filter - Google Patents

Description

GGSh

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The invention relates to devices for controlling and cleaning process of industrial gases from dust in electrostatic precipitators and can be used in the metallurgical, chemical and other industries. A control device is known for "shaking electrodes in an electric frequency filter comprising a carrier frame on which electrodes, a hammer impact mechanism, an electric motor and a time relay are fixed. The principle of operation of the device is based on the fact that the electrodes are shaken at regular intervals. For measuring the dust content of the gas stream at the outlet of the electrostatic precipitator, we experimentally determine the rational time leakage between shakes 11. A disadvantage of the device is that the moment of electrodes shaking is fixed, n for productions characterized by significant fluctuations in the gas load, dust layer formed by the time of shaking on the electrodes, may be (with a reduced gas load) insufficient, which leads to its dispersion during the period of shaking and the increase of secondary dust removal. On the contrary, by the time of shaking, a thick layer of dust forms on the precipitation electrode, which deteriorates the conductivity of the interelectrode space and prevents further sedimentation of dust, thus decreasing the electrostatic precipitator. The closest to the invention according to the technical nature and the result achieved by the aforementioned is the control device of an electrostatic precipitator, which contains the power units of the fields of the electrostatic precipitator, the L-technisms of its electrodes to the primary device. The device starts a cycle of removal depending on the weight of dust accumulated on the collector plates. The plates bend under the grip of dust, and with a certain increase in weight, the bend becomes so large that the plates actuate a trigger that controls the mechanisms for removing electrodes of the electrostatic precipitator 23. However, the accuracy of the adjustment and determination of the moment of discharge of electrodes of this device operating at high temperatures and in aggressive dust-gas environments, it is low because the elasticity of the sensitive element (collector plates) changes over time. The purpose of the invention is to improve the accuracy of control of the electrostatic precipitator. The goal is achieved by the control device of the electrostatic precipitator, which contains units for feeding the fields of the electrostatic precipitator, mechanisms for removing its electrodes and the primary device, additionally contains the first and second computing devices, the integrator and the flow meter and dust meter installed at the input of the electrostatic precipitator, the output of the flow meter being connected to the input a primary device, the first output of which is connected to the first input of the first computing device, the second input of which is connected to the output of the power unit, and you the course is connected with the first input of the second computing device, the second input of which through the integrator is connected to the output of the dust meter and the second output of the primary device, and the output is connected with the mechanisms for removing electrodes of the electrostatic precipitator. A schematic diagram of the device is shown in the drawing. The device consists of an electrofilter 1, at the inlet of which a flow meter 2 and a dust meter 3 are installed to measure the technological characteristics of the gas flow. The output of the flow meter 2 is connected to the input of the primary device 4, the first output of which is connected by the first input of the first computing device 5, the second input of the last fed from the voltmeters of units b of the field power supply of the electrostatic precipitator 1. Vb (GhoD of the first computing device 5 is connected to the first input of the second computing device device 7, the second input of which is connected through the integrator 8 with the output of the dust meter 3 and the second output of the primary device 4, and the output of the second calculating device 7 is connected to the mechanisms 9 One device of the electrostatic precipitator 1. The device operates in the following way. In the gas flow entering the electrostatic precipitator 1, the primary device 4 of the flow meter 2 measures the amount of gas flowing through the electrostatic precipitator 1, and the dust meter 3 measures the flow of the gas flow into the integrator 8 where the amount of dust entering the volume of the electrostatic precipitator 1 is calculated by multiplying their instantaneous values and summing over time bjc (t) d, (t) dt.

In the first computing device 5, using the values of the gas flow rate and the voltage taken from the voltmeter of the power supply unit 6, the degree of dust capture by an electric filter 1 g V is calculated.

fL 1-eKp -

V, r

and

7

de c

the amount of dust entering the electrostatic precipitator

q (t) is the instantaneous gas flow,. MVc; B - the degree of dust capture

electrostatic precipitator, d .. (t) - instantaneous dust content of gas, particle drift velocity

% dust to electrodes, m / s, gas velocity m / s; : constant value

L is the length of the energy field of the electrostatic precipitator, m; distance from the precipitation electrode to the corona-forming electrode, m;

a correction taking into account the dielectric constant, gas viscosity and size of dust particles;

and - voltage on the unit

nutrition, ke.

Calculated in the integrator 8 and. the first computing device 5: the signals of the amount of dust entering the electrostatic precipitator 1, and the degree of its trapping i: Pivani arrive at the inputs of the second scoring device 7, where the multiplication of the dust deposited on the electrodes is obtained:

G

Gv

After comparing the received key with the specified stored in memory of the second computing device 7, and in case of equality of the latter, the signal from the output of the second computing device .7 receives neither the electrostatic filter 1 removal mechanism 9.

The application of the proposed device will increase the efficiency of the electrostatic precipitator by 1.5%. With the capacity of the electrostatic precipitator complex 4000 tons of dust per year, 60 tons of dust will be additionally captured.

Claims (1)

ELECTRIC FILTER CONTROL DEVICE, containing power units for the fields of the electrostatic precipitator, mechanisms of shaking off its electrodes' and a primary device, characterized in that, in order to improve the accuracy of controlling the electrostatic precipitator, the device additionally contains first and second computing devices, an integrator and a flow meter installed at the input of the electrostatic precipitator a dust meter, while the output of the flowmeter is connected to the input of the primary device, the first output of which is connected to the first input of the first computing device, the second input otorrhea connected to the output power supply unit, and an output to a first input of a second computing device, the second input of which via an integrator connected to the output and second output of the dust meter § primary device, and output - with me mechanism of otryahivaniya precipitator electrodes. SU „.1080871