RU2338579C1 - Impulse-2 acoustic scrubber - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: proposed acoustic scrubber incorporates a housing made up of the upper and lower sections, a branch pipe to feed dusty gas, a mist eliminator furnished with a centrifugal swirler and a branch pipe to withdraw liquid from the aforesaid mist eliminator, a spraying system, plates with a vibrator and a stabiliser, a cyclic-spraying nozzle and a mud collector. The aforesaid stabiliser cells are square, while the stabilizer h_s to cell width b_s ratio exists in the range of h_s/b_s = 1.5 to 1.8. The plates are mare either perforated with the plate thickness b_p to hole diameter d_h ratio equal to h_p/d_h=0.5 to 1.5 slit-like with the plate thickness-to-slit width ratio in the range of h_p/b_h=0.8 to 1.5. The housing height H to housing diameter D ratio exists in the optimum range of H/D=4.0 to 6.5, while the housing diameter D to mist eliminator diameter d₁ lies in the range of D/D₁=1.2 to 1.25 and the housing diameter D to inlet and outlet branch pipe diameters B₁ exists in the range of D/B₁=2.0 to 2.5. The spraying system represents an acoustic nozzle incorporating a casing housing an ultra-sound frequency oscillation generator made up of a nozzle and an annular cavity resonator. The nozzle casing represents a vertical cylindrical sleeve with its upper part accommodating an air feed pipe. Note that a liquid feed pipe is arranged perpendicular to the aforesaid pipe, and the sleeve with top and bottom flanges is rigidly secured inside the housing and aligned with it. The aforesaid bottom flange is rigidly secured in the housing groove. The rod is arranged inside the aforesaid sleeve and aligned with it, the rod end being furnished with the aforesaid cavity resonator pressed therein and representing a taper-surface cup and the rod tail being furnished with locating plates to interact with the sleeve inner surface. The aforesaid lower flange accommodates, at least, one nozzle arranged at the angle to the cavity resonator axis varying 20°÷40°. Note here that the nozzle axis continuation lies on the circumference located at the resonator taper surface center.

EFFECT: higher efficiency and reliability provided for by increasing spraying efficiency.

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Description

The invention relates to techniques for wet dust collection and can be used in chemical, textile, food, light and other industries for the purification of dusty gases.

The closest technical solution to the claimed object is a gas scrubber, known from the book of A.A. Rusanov. A guide to dust and ash collection. M .: Energoatomizdat, 1983, p. 103, Fig. 4.21 (prototype), comprising a housing consisting of upper and lower sections, a pipe for introducing dusty gas, a pipe for exiting purified gas, a spray catcher with a centrifugal swirler and a pipe for venting liquids from a spray catcher, an irrigation device, plates with a stabilizer, a nozzle for periodic irrigation of a swirler and a sludge collector.

The disadvantage of the prototype is the relatively low efficiency of the dust collection process due to the underdeveloped spray surface of the liquid.

The technical result is an increase in the efficiency and reliability of the dust collection process by increasing the degree of liquid atomization by nozzles.

This is achieved by the fact that in a gas scrubber containing a housing consisting of upper and lower sections, a nozzle for introducing dusty gas, a nozzle for exiting purified gas, a spray catcher with a centrifugal swirler and a nozzle for draining liquid from the spray catcher, an irrigation device, plates with a vibrator and stabilizer, a nozzle for periodic irrigation and a sludge collector, and the stabilizer cells are square, and the ratio of the stabilizer height h _c to the cell width b _c is in the optimal range of values: h _c / b _c = 1.5 ... 1.8, and the plates are perforated with the ratio of the plate thickness b _t to the diameter of the holes d _о being in the optimal range of values: b _t / d _o = 0.5 ... 1 , 5, or slotted with the ratio of the plate thickness b _t to the width of the slots b _o being in the optimal range of values: h _t / b _o = 0.8 ... 1.5, while the ratio of the height of the casing H to the diameter D is the optimal range of values: H / D = 4.0 ... 6.5, and the ratio of the diameter of the housing D to the diameter of the splash trap D ₁ is in the optimal range of values: D / D ₁ = 1.2 ... 1.25, and the ratio of the diameter of the housing D to the diameters of the input and the outlet pipe D ₂ is in the optimal range of values: D / D ₂ = 2.0 ... 2.5, the irrigation device is made in the form of an acoustic nozzle for spraying liquids, containing a housing with an acoustic oscillator located inside the nozzle and resonator, moreover, the housing is made in the form of a vertically arranged cylindrical sleeve, in the upper part of which there is a tube for supplying air, and perpendicular to its axis there is a tube for supplying liquid, inside the case, coaxially to it, the sleeve from the flange is rigidly fixed and upper and lower, and the lower flange is rigidly fixed in the groove made in the housing, inside the sleeve, coaxially to it, there is a rod, at the end of which an annular volume resonator is pressed, made in the form of a cup with a conical surface, and fixing disks are located in its rear part interacting with the inner surface of the sleeve, and in the lower flange at least one nozzle is located at an angle to the axis of the resonator, the value of which lies in the following range of values: 20 ° -40 °, while the continuation of the axis of the nozzle lies um on a circle located in the middle of the conical surface of the resonator.

Figure 1 shows a General view of the gas scrubber, figure 2 is a diagram of an acoustic nozzle.

The gas scrubber contains a housing consisting of upper 4, middle 5 and lower 7 sections, a nozzle for introducing dusty gas, a nozzle for exiting the purified gas, a spray catcher 1 with a centrifugal swirler 2 and a pipe 3 for draining liquid from the spray catcher, an irrigation device 9 with an acoustic nozzle, at least one plate 8 with a stabilizer 6, a nozzle for periodic irrigation of the plates 8 and a sludge collector, and a vibrator is additionally installed on the plates 8 (not shown in the drawing). The cells of the stabilizer 6 can be made square, and the ratio of the height of the stabilizer h _c to the width of the cell b _s is in the optimal range of values: h _c / b _c = 1.5 ... 1.8. Plates 8 can be made holey with the ratio of the plate thickness h _t to the hole diameter d _o being in the optimal range of values: h _t / d _o = 0.5 ... 1.5. Plates 8 can be made slotted with the ratio of the plate thickness h _t to the width of the slots b _o , which is in the optimal range of values: h _t / b _o = 0.8 ... 1.5. The ratio of the housing height H to the diameter D is in the optimal range of values: H / D = 4.0 ... 6.5. The ratio of the diameter of the housing D to the diameter of the splash trap D ₁ is in the optimal range of values: D / D ₁ = 1.2 ... 1.25. The ratio of the diameter of the housing D to the diameters of the inlet and outlet nozzles D ₂ is in the optimal range of values: D / D ₂ = 2.0 ... 2.5.

As a spray, an acoustic nozzle is used (Fig. 2), comprising a housing 10 with an ultrasonic frequency range sound generator located in the form of a nozzle 12 and an annular volume resonator 14. The housing 10 is made in the form of a vertically arranged cylindrical sleeve, in the upper part of which there is a tube 16 for supplying air, and perpendicular to its axis is a tube 17 for supplying liquid. Inside the housing 10, coaxially with it, a sleeve 23 is rigidly fixed with flanges upper 11 and lower 15, the lower flange 15 being rigidly fixed in the groove made in the housing 10.

Inside the sleeve 23, coaxially with it, there is a rod with a diameter d, at the end of which an annular volume resonator 14 is pressed, made in the form of a cup 18 with a conical surface 20. In the rear part of the rod 13 there are fixing discs 21 and 22 made in the form of elastic petals interacting with the inner surface of the sleeve 23. At least one nozzle 19 is located in the lower flange 15 at an angle to the axis of the resonator 14, the value of which lies in the following range of values: 20 ° -40 °, and the continuation of the axis of the nozzle 19 lies on a circle located camping in the middle of tapered surface 20. The inner surface of the sleeve 23 are coaxial conical 24 and cylindrical 25 opening.

For optimal operation of the nozzle, the following ratios of its parameters must be observed:

The ratio of the height h _{1 of the} annular volume resonator 14 to the distance h between the upper base of the conical surface 20 and the lower end surface of the housing 10 lies in the optimal range of values: h ₁ / h = 1 ÷ 3;

The ratio of the inner diameter d _{1 of the} cup 18 of the resonator 14 to the diameter d _{2 of} its outer cylindrical surface lies in the optimal range of values: d ₁ / d ₂ = 0.7 ÷ 0.9;

The ratio of the inner diameter d _{1 of the} cup 18 of the resonator 14 to the diameter d of its rod lies in the optimal range of values: d ₁ / d = 1.25 ÷ 3;

The ratio of the inner diameter d _{1 of the} cup 18 of the resonator 14 to the height h _{1 of the} annular volume resonator 14 lies in the optimal range of values: d ₁ / h ₁ = 1 ÷ 2.

The acoustic gas scrubber operates as follows.

The dusty gas stream enters the casing through the inlet of the dusty gas stream and meets plate 8 on its way, then the gases pass through the liquid layer in the form of bubbles (foam), on the surface of which dust particles are deposited. The device operates in the mode of a wet dust collector with a failure plate, which reduces the likelihood of clogging of the holes of the plate 8 with dust, since the supply of gases to and from the zone of contact with the liquid is carried out through the same hole or slotted openings of the plates 8. The formation of gas-liquid suspension (foam ) is further enhanced by the creation of a vibro-boiling layer in the upper layers of the liquid located on the plates 8, due to the use of a vibrator, which leads to a more intense interaction of gas and liquid flows.

The acoustic nozzle for spraying liquids works as follows. A spraying agent, for example air, is supplied through a tube 16, where it encounters an annular volume resonator 14. In the latter, as a result of the passage of the resonator 14 by a spraying agent (for example, air), pressure pulsations arise in the latter, creating acoustic vibrations, the frequency of which depends on the parameters of the resonator. The acoustic vibrations of the spraying agent contribute to a finer atomization of the liquid supplied through the tube 17 to the nozzles 19, from where it enters the circle located in the middle of the conical surface 20 of the resonator 14, then crushes under the influence of acoustic air vibrations into small droplets, resulting in a torch sprayed solution with air, the root angle of which is determined by the angle of inclination of the conical surface 20 of the resonator 14.

The proposed device can be used to clean fine dust and humidify air in ventilation units and air conditioning units, as well as in trapping mists, readily soluble dust, as well as in joint processes of dust collection, gas cooling and absorption. The effectiveness of the proposed design of the apparatus increases due to the larger surface of the gas-liquid suspension, by using a vibro-fluidized bed in a liquid and in the above processes and when collecting dust particles larger than 5 microns in size is about 92% ... 95%.

Claims (1)

An acoustic gas scrubber containing a housing consisting of upper and lower sections, a nozzle for introducing dusty gas, a nozzle for exiting purified gas, a spray catcher with a centrifugal swirl and a nozzle for draining liquid from the spray catcher, an irrigation device, plates with a vibrator and with a stabilizer, a nozzle for periodic irrigation and sludge collector, and the stabilizer cells are made square, and the ratio of the stabilizer height h _c to the cell width b _s is in the optimal range of values h _c / b _c = 1.5 ... 1.8, and the plates are made with holes with the ratio of the plate thickness h _t to the diameter of the holes d _o being in the optimal range of values h _t / d _o = 0.5 ... 1.5, or slotted with the ratio of the plate thickness h _t to the width of the slots b _o , being in the optimal range of values of h _t / b _o = 0.8 ... 1.5, while the ratio of the height of the housing H to the diameter D is in the optimal range of values of H / D = 4.0 ... 6.5, and ratio D to the diameter of the housing bryzgoulovitelya diameter D ₁ is in the optimum range values D / D ₁ = 1.2 ... 1.25, and the ratio of housing diameter D to the diameter of the inlet and outlet pat ubkov D ₂ is in the optimal range of values of D / D ₂ = 2.0 ... 2.5, characterized in that the irrigation device is a speaker nozzles for atomization of liquids, comprising a housing with a generator housed within sound vibrations in the ultrasonic frequency range in the form of a nozzle and an annular volume resonator, the housing being made in the form of a vertically arranged cylindrical sleeve, in the upper part of which there is a tube for supplying air, and a tube for supplying liquids is perpendicular to its axis , inside the housing, coaxially to it, a sleeve with upper and lower flanges is rigidly fixed, the lower flange being rigidly fixed in the groove made in the housing, and inside the sleeve, coaxially with it, there is a rod of diameter d, at the end of which an annular volume resonator made in in the form of a cup with a conical surface, and in the rear part of the rod there are fixing discs interacting with the inner surface of the sleeve, and at least one nozzle is located in the lower flange at an angle to the axis of the resonator, the value of which th is in the following range of values: 20 ÷ 40 °, with the continuation of the nozzle axis lies on a circle located in the middle part of the conical surface of the resonator, and the ratio of the height h _i of the annular cavity to the distance h between the upper base of the conical surface and the lower end surface of the housing lies in the optimal range of values of h ₁ / h = 1 ÷ 3; the ratio of the inner diameter d _{1 of the} resonator cup to the diameter d _{2 of} its outer cylindrical surface lies in the optimal range of values of d ₁ / d ₂ = 0.7 ÷ 0.9; the ratio of the inner diameter d _{1 of the} resonator cup to the diameter d of its core lies in the optimal range of d ₁ / d = 1.25 ÷ 3; the ratio of the inner diameter d _{1 of the} resonator cup to the height h _{1 of the} annular volume resonator lies in the optimal range of d ₁ / h ₁ = 1 ÷ 2.

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