RU2338580C1 - Device for cleaning gases of venturi pipe type - Google Patents

Abstract

FIELD: chemistry; technological processes.

SUBSTANCE: device for cleaning gases of the Venturi type consists of a confuser, neck, diffuser, regulation insertion joined by a rod to an actuator, spray line, holder, installed in the diffuser. The regulation insertion made from elements, coaxially installed at a distance from each other. The outer element is immovably fixed to the rod by spokes, while the inner element is mounted on the rod with provision for linear displacement and has supports, located between spokes of the outer element. The spray line is made in form of a collector with acoustic burners. Each of the burners consists of a case with a generator of acoustic oscillations in form of a nozzle and resonator, pipes for letting in air and liquid inside it. The case is in form of a vertical cylindrical bushing, in the upper part of which there is pipe for letting in air and perpendicular to its axis, there is a pipe for letting in liquid. Inside the case, in line with it, a bushing is rigidly fixed, with upper and lower flanges. The lower flange is rigidly fixed in a cavity, made in the case, and inside the bushing, in line with it, there is a rod, at the end of which a ring shaped cavity resonator is pressed in, made in form of cup with a cone shaped surface, and at the tail-end part of the rod, there are locking discs, linked to the inner surface of the bushing. In the lower flange there is at least one nozzle at an angle to the axis of the resonator, the value of which lies in the interval 20°÷40°. The extension of the axis of the nozzle lies within a circle, which is in the middle part of the cone shaped surface of the resonator.

EFFECT: reduced power input on cleaning gases.

3 dwg

Description

The invention relates to techniques for cleaning gases from dust and chemical hazards and can find application, for example, in iron and steel enterprises.

Closest to the claimed object in terms of technical nature and the achieved result is a gas purification device such as a Venturi pipe according to the USSR author's certificate No. 942287, cl. B01D 47/10, 1979, containing a confuser, a neck, a diffuser, a regulating insert connected via a rod to the actuator, an irrigation system, a latch installed in the diffuser, the regulating insert being made of elements coaxially installed at a distance from each other, while the outer element is rigidly fixed to the rod using knitting needles, and the inner element is mounted on the rod with the possibility of longitudinal movement and has stops located between the spokes of the outer element (prototype).

A disadvantage of the known device is that with large quantities of cleaned gases, energy consumption for the control system increases due to the lack of devices for fine atomization of the liquid.

The technical result is a reduction in energy consumption for gas purification.

This is achieved by the fact that in a device for gas purification such as a Venturi pipe, including a confuser, a neck, a diffuser, a regulating insert connected via a rod to the actuator, an irrigation system, a clamp installed in the diffuser, and the regulating insert is made of coaxially installed at a distance from each other other elements, while the outer element is rigidly fixed to the rod using spokes, and the inner one is mounted on the rod with the possibility of longitudinal movement and has stops located between the spokes of the outer element, the topic of irrigation is made in the form of a collector with acoustic nozzles, each nozzle containing a housing with an acoustic oscillator located inside the nozzle and resonator, tubes for supplying air and liquid, 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 perpendicular to its axis there is a tube for supplying fluid, and inside the body, coaxially to it, a sleeve with upper and lower flanges is rigidly fixed the lower flange is rigidly fixed in the groove made in the housing, and an annular volume resonator made in the form of a cup with a conical surface is located coaxially inside the sleeve, while the cup is pressed onto the rod with a diameter d of the resonator, and fixing disks made in its rear part are made in the form of elastic petals 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 lies in the following range of values: 20 °: 40 °, pr This continuation of the nozzle axis lies on a circle located in the middle part of the conical surface of the resonator.

Figure 1 shows a longitudinal section of the proposed device; figure 2 is a section aa in figure 1, figure 3 is a diagram of an acoustic nozzle in an irrigation device.

A device for gas purification such as a Venturi pipe includes a confuser 1, a neck 2, a diffuser 3, a divider 4, through which water is supplied, a regulating insert 5, consisting of an outer element 6 and an inner element 7 having stops 8. Element 6 is rigidly made using knitting needles 9 connected to the rod 10, which is moved by the actuator 11.

The outer element 6 of the insert is installed with a gap with respect to the inner element 7 of the insert. Element 7 is installed with a gap on the rod 10 and has the ability to move. The stops 8 mounted on the element 7 are located between the spokes of the element 6. The height of the stops N is greater than or equal to the distance from the latch 12 installed in the diffuser 3 to the lower position of the outer insert element L, a L + b> H, where b is the height of the outer insert element.

The acoustic nozzle contains a housing 16 with an ultrasonic frequency range sound generator placed in the form of a nozzle 18 and an annular volume resonator 20. The housing 16 is made in the form of a vertically arranged cylindrical sleeve, in the upper part of which there is a tube 22 for air supply, and is perpendicular to its axis tube 23 for supplying fluid. Inside the housing 16, coaxially to it, a sleeve 29 is rigidly fixed to the flanges of the upper 17 and lower 21, and the lower flange 21 is rigidly fixed in the groove made in the housing 16.

Inside the sleeve 29, coaxial to it, there is a rod of diameter d, at the end of which an annular volume resonator 20 is pressed, made in the form of a cup 24 with a conical surface 26. In the rear part of the rod 19 there are locking discs 27 and 28 that interact with the inner surface of the sleeve 29. At least one nozzle 25 is located in the lower flange 21 at an angle to the axis of the resonator 20, the value of which lies in the following range of values: 20 ° ÷ 40 °, and the continuation of the axis of the nozzle 25 lies on a circle located in the middle of the conical surface identity 26. On the inner surface of the sleeve 29 are made coaxial conical 30 and cylindrical 31 holes.

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 20 to the distance h between the upper base of the conical surface 26 and the lower end surface of the housing 16 lies in the optimal range of values: h ₁ / h = 1 ÷ 3;

The ratio of the inner diameter d _{1 of the} cup 24 of the resonator 20 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 24 of the resonator 20 to the diameter d of its rod lies in the optimal range of values: d ₁ / d = 1 ÷ 3;

The ratio of the inner diameter d _{1 of the} cup 24 of the resonator 20 to the height h _{1 of the} annular volume resonator 20 lies in the optimal range of values: d ₁ / h ₁ = 1 ÷ 2.

The operation of the device is as follows.

Contaminated gases entering the venturi, by the divider 4 are distributed along the annular gap between the cylindrical body 13 and the divider 4, which also receives the irrigation fluid through the manifold 14 and the acoustic nozzles 15 (figure 3). With the maximum amount of cleaned gases, the regulating insert 5 is in the upper position. In this case, the element 7 rests on the spokes 9, clinging to them due to the pressure of the gas to be cleaned and weight. To the middle position, the relative position of the inner element 7 and the outer element 6 remains unchanged. Then, with a decrease in the amount of gas to be cleaned, the outer element 6 moves down, and the inner 7 is fixed on the stops 8, thereby transferring the load from them to the gas pressure.

The pressure drop across the venturi pipe increases with decreasing flow rate, i.e. when the regulating insert moves down. Therefore, with the most significant pressure drop across the venturi, when the outer element 6 of the insert 5 is in the lower position and the inner element 7 is fixed, the load on the actuator 11 will be reduced.

The main amount of gas to be cleaned at maximum opening passes through the gap between the outer element 6 and the confuser 1. A certain amount, about 15% of the maximum, passes through the gap between the outer element 7, and both of these gases are cleaned by supplying water through the divider four.

When lowering the regulating insert to the lower position, the purified gas passes into the gap between the outer and inner parts. The gas passing through the gap creates aerodynamic protection against wear by the gas flow of the rod 10. Similar wear is observed on Venturi pipes of a similar design.

Thus, the advantages of the proposed device are to reduce energy consumption for gas purification and increase the wear resistance of internal nodes.

The acoustic nozzle operates as follows.

The spraying agent, for example air, is supplied through a tube 22, where it encounters an annular volume resonator 20. In the latter, pressure pulsations occur 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 finer atomization of the liquid supplied through the tube 23 to the nozzles 25, from where it falls onto a circle located in the middle of the conical surface 26 of the resonator 20, 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 26 of the resonator 20.

Claims (1)

A device for cleaning gases such as a Venturi pipe, including a confuser, a neck, a diffuser, a regulating insert connected via a rod to the actuator, an irrigation system, a clamp installed in the diffuser, and the regulating insert is made of elements coaxially installed at a distance from each other, while the outer the element is rigidly fixed to the rod with the help of knitting needles, and the inner one is mounted on the rod with the possibility of longitudinal movement and has stops located between the spokes of the outer element, characterized in that the system irrigation is made in the form of a collector with acoustic nozzles, each nozzle containing a housing with an acoustic oscillator located inside the nozzle and resonator, tubes for supplying air and liquid, the housing being made in the form of a vertically arranged cylindrical sleeve, in the upper part of which a tube for supplying air, and perpendicular to its axis there is a tube for supplying fluid, and inside the body, coaxially to it, a sleeve with upper and lower flanges is rigidly fixed, while the flange is rigidly fixed in the groove made in the housing, and inside the sleeve, coaxially, there is a rod of diameter d, at the end of which an annular volume resonator is made, made in the form of a cup with a conical surface, and fixing disks interacting with the inner surface of the sleeve, and in the lower flange there is at least one nozzle 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 on the circumference in the middle part of the conical surface of the resonator, and the ratio of the height h _{1 of the} annular volume resonator 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 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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