SU1255211A1 - Electrostatic precipitator - Google Patents

Description

to

15

The invention relates to electrical cleaning of gas from dust and can be used in the power, metallurgical and cement industry x.5

The aim of the invention is to increase the efficiency of dust collection in the electrostatic precipitator by reducing gas leaks through the inactive zones, reducing the average flow rate in the core and uniformly distributing the gas velocities over the gas reflectors.

Figure 1 shows the electrostatic precipitator, a longitudinal section; figure 2 - section aa in figure 1.

The electrostatic precipitator contains an input device 1, an output device 2, a housing 3, a corona-cooler system and collecting electrodes 4, a hopper 5, 20 agitating mechanisms 6, trapezoidal gas deflectors 7. For an EHFD electric filter DGPN) - 55-3 length of the hopper L 5 m, width В 5.5 m, the height of the trapezoid gas deflectors installed at the entrance to the first, second and third electrode systems are determined from the ratio, 0375 (5 -n) L and, respectively, 75m, Ь 0.56 m, h 0, 38 m, the length of the upper 30 bases of trapezoidal gas deflectors b 0.3 V 1.65 m.

The electrostatic precipitator works as follows.

The gas to be cleaned enters the electro-filter through the inlet device 1, while a part of the gas flow moves along the lower inclined wall of the inlet device 1 in the direction of the bunker 5 of the first electrode system 40 4, of its movement and passes through the lower part of the first system of electrodes 4, mine hopper 5. 45 At the entrance to the next system of electrodes 4, a stream flows around the second trapezoidal gas deflector 7, is pressed to the middle part of the electrostatic precipitator and so It passes through the core. Stream 50

o

five

five

20 30

35 40 45 50

the gas, thus passing all the electrode systems 4, is removed from the apparatus through the output device 2.

The share of the flow passing outside the active zones depends on the depth of the bunker 5, with the maximum share of the flow corresponding to the depth of the bunker 5 V. its central part is zero at the side walls of the apparatus; therefore, the gas deflectors 7, made in the form of equal trapeziums, make it possible to reduce not only the leakage rate through the inactive zones, but also the average gas flow rate in the core.

The presence of a gas deflector section of constant height is determined by the dependence of the leakage size on the width of the bunker and is determined from the ratio b b 0.3 V, where b is the length of the upper component of the trapezoidal gas deflector, B is the width of the bunker.

The share of the flow moving in the direction of the first bunker is greater than the fraction of the gas flow tending to pass through the second bunker. The reason for this is the inclined wall of the inlet device, which directs the flow into the first bunker, while the flow to the first electrode system is almost horizontal, therefore the height of the first trapezoidal gas deflector is greater than the second. The output device pushes off the gas flow to the central region of the core and reduces the proportion of leaks through the last bunker, which allows reducing the height of the trapezoidal gas deflectors of the latter electrode system compared to the heights of the gas deflectors of the middle electrode systems. Reducing the heights of the trapezoidal gas deflectors along the gas flow reduces the average gas flow rate.

The holes in the upper part of the trapezoidal gas deflectors, passing a part of the flow, ensure an even distribution of the gas velocity over the gas deflectors and prevent erosion of the trapped dust layer.

FIG. 2

Editor G. Volkova

Compiled by N. Godunov

Tehred I. Veres Proofreader T. Kolb

Order D744 / 8 Circulation 51A: Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and graphic enterprise, Uzhgorod, Projecto st., 4

Claims (1)

ELECTROFILTER containing an input and output device, a housing inside which there are systems of corona and precipitation electrodes, shaking mechanisms, hoppers and gas deflectors installed across the flow at the inlet and outlet of each electrode system, characterized in that, in order to increase the efficiency of dust collection in electrostatic precipitator by reducing gas leaks through inactive zones, reducing the average flow rate in the active zone and even distribution of gas velocities over gas reflectors, gas reflection The bodies are made in the form of isosceles trapezoid with one row of round holes located at the upper edges, the height of the trapezoidal gas deflectors h = 0.0375 (5-p) L (m), and the length of the upper base of the trapezoid L <0.3 V, where h - height _with trapezoidal GOVERNMENTAL gazootrazhateley, η - ref gas along the electrode system number, which is set in front of trapezoidal gazootrazhatel, b of the upper base length of a trapezoid, L - length of the hopper, b - width of the hopper. S and., 1255211