RU2048166C1 - Gas scrubbing filter - Google Patents

Abstract

FIELD: filtering devices for gases and vapors. SUBSTANCE: filter has square-shaped vertical knee-formed filtration chamber. Flow of balls flies though the chamber from bunker across rotatory regulating device and acceleration channel, which has height-adjusted wall at output of the chamber. Ball stream generates gas-permeable shutter across the total section. The shutter crosses speed gas stream, which blows from down to up, as a result, cleaning is performed. There are peepholes with illumination on side walls of the chamber for observing the stream. Ball stream together with dust enters bath along the curved funnel, and it returns to bunker by means of conveyer after being released from slam. Energy of falling of ball stream in the funnel is used for cleaning balls from slam due to ejection and formation of jets through nozzles. EFFECT: improved quality of cleaning. 4 cl, 3 dwg

Description

 The invention relates to gas purification devices, in particular to granular filters, and can be used for purification of hot gases.

 The goal is to reduce hydraulic resistance, increase speed, and expand the use of liquid absorbers for capturing and absorbing harmful atmospheric emissions that are part of, for example, hot gases.

 Figure 1 shows a General view of the filter with a longitudinal section through the bath; figure 2 section aa in figure 1; figure 3 section BB in figure 1.

 The wet gas purification filter contains a vertical rectangular cross-section filter chamber 1 with an opening 2 for supplying contaminated gas and an opening 3 for discharging purified gas, a hopper 4 for accommodating the filter ball material.

 The rotary control device, made in the form of a rotary shaft 5 with a lever 6 and a latch 7, is connected to the acceleration channel 8, which communicates with the filter chamber 1 with a bifurcated slot, while the acceleration wall 9 from the beginning of the bushing fits close to the side walls of the channel and can be raised or lowered by screw 10.

 The rotary shaft 5 is made in the form of a half shaft made of cut along the pipe, overlapped by a welded steel strip having welded trunnions at the ends. A curved bell 11 is located on the wall of the chamber, the end of which is made in the form of an expanding nozzle 12 having four helical mismatched nozzles 13 on the side walls, while the end of the bell enters the bath 14 having a trough bottom 15 with a slope towards the pit 16, in which a chain conveyor 17 is installed, connected through a pipe 18 with a hopper 4.

 The bathroom has a wall 19, a drain pocket 20, flushing the filter material and sludge cone nozzle 21 and slotted nozzle 22 to remove sludge from the pit.

 On both sides on the walls of the chamber to monitor the correct flight of the filter material made viewing windows 23 with backlight. A window cut out in the chamber wall is enclosed by a frame 24 of squares, a box 25 is inserted with flanged walls, into which a thickened glass 26 is inserted, which is fastened in it with spring brackets 27. The box has a reflector 28.

 To turn off the bell, a rotary valve 29 is used. For filling the filter material there is a hatch 30, 31 indicates a pressure circulation pipe, 32 a gravity drain pipe, 33 a slotted nozzle for air intake to reduce inhibitory turbulence in the channel.

 As a filter material, a metal fraction of the same size with a diameter of about 2 mm is used, made of strong chemically resistant, having a large specific gravity of metals, for example alloyed cast iron.

 Water is used as liquid traps only for dust (ash), and appropriate chemical absorbers, for example, alkali solutions and other chemically active liquid substances, are used to absorb harmful dust and oxides for harmful gases.

 In the process, the wet ball filter material from the hopper 4 through the open slot created by turning the shaft 5, enters the acceleration channel 8, acquires high speed and, flying out of the channel, crosses the gas flow passing from the bottom up through the chamber 1 over the entire cross-sectional area of the chamber creating a horizontal gas permeable curtain.

 As a result of the intersection of these two high-speed flows of gas and flying wet balls, their interaction during the flow, as well as the dynamic forces arising from this, the gas is cleaned of mechanical impurities harmful to the nature of gases or oxides if the corresponding chemically active liquid is used as a humidifier absorbing substances.

 Due to the fact that wet chilled balls cross the filter chamber for fractions of a second, it becomes possible to purify high temperature gases, and the presence of a very large total surface (area) of gas contact with the wet film when flowing around the balls in combination with high temperature can contribute to the scale and speed of some chemical absorption reactions.

 In order for the flow of flying balls to exactly get into the channel of the socket 11, the accelerating wall-springboard 9 can be raised or lowered by screws 10 when observed through viewing windows with illumination 23 located on the side walls of the filter chamber.

 The high-speed flow of balls in a continuous stream passes through the expanding lower section of the socket 12 located in the bath 13 below the liquid level 34, ejects the liquid from the bath through the nozzles 13, being exposed to these side jets. But since the nozzles are spaced apart, then the action of the jets of liquid will occur sequentially from different sides, causing a zigzag motion of the balls, likened to the well-known method of rinsing. Therefore, the energy of dropping balls is used to launder sludge.

 The overflow wall 19 and the drain pocket 20 in the bath always maintains a constant level of fluid 34 supplied through the pressure pipe 31 of the circulating system.

 Balls feeding downward from the bell to an inclined trough-like bottom 15 by the pressure of the jets of the nozzle 21 together with the slurry are discharged into the pit 16, in which they fall under the stream of the slotted nozzle 22, are washed from the sludge, which flows through the overflow wall, and the clean balls by a chain conveyor 17 sec perforated buckets rise and on the shaped pipe 18 are returned to the hopper 4.

Claims (4)

 1. WET GAS CLEANING FILTER, comprising a vertical knee-shaped filter chamber with gas inlet and outlet openings, a loading hopper, a regulating device for supplying a flow of filter ball material crossing the flow of the gas to be cleaned, a bell, a bath for washing ball material with means for removing sludge and a device to return the ball material to the hopper, characterized in that, in order to reduce hydraulic resistance and increase the efficiency of absorption of harmful emissions and cleaning speed g call, the control device feeding a flow of the filter material of the ball pivot is designed as a hollow poluvala flat wall having a ledge.  2. The filter according to claim 1, characterized in that a springboard adjustable in height is made on a wall section.  3. The filter according to claim 1, characterized in that a control window with a backlight is made in the filter chamber.  4. The filter according to claim 1, characterized in that at the lower expanding part of the bell mounted different height nozzles.

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