SU1666163A1 - Device for purification of effluent gases from sulphureous compounds - Google Patents

Abstract

The invention relates to gas (vapor) - liquid devices, can be used in pulp and paper, chemical, hydrolysis and other industries in the purification of industrial gas emissions from sulfur containing compounds and improves the efficiency and reliability of the device due to the turbulized contact surface. The device for cleaning gas emissions consists of a cylindrical body, inside the body there is a venturi tube in the central part, consisting of a ring, a confuser and a diffuser, rigidly interconnected. The Venturi tube with its lower part is rigidly fixed on the drift catcher, on which the cylindrical body is also located. The venturi tube forms a pocket with the body wall. In the upper part of the cylindrical body there are two fittings. One of them is located tangentially, diametrically opposite to the input of the gas flow and is equipped with a slot nozzle. Another nozzle is installed in the upper part above the venturi and has a cone-slit shape. The gas inlet is tangentially located in the upper part of the body, and the gas outlet is located in the upper part of the droplet separator. The irrigating fluid is discharged through a nozzle located at the bottom of the drift catcher. 3 il.

Description

The invention relates to gas (vapor) - liquid devices and can be used in pulp and paper, chemical, hydrolysis and other industries when cleaning.

industrial gas emissions from sulfur-containing compounds.

The purpose of the invention is to increase the efficiency and reliability of the device by creating a turbulized contact surface of phases.

Figure 1 shows a longitudinal section of the device; figure 2 - cross section of the device; on fig.Z - top view.

A device for cleaning gas emissions from sulfur-containing compounds includes a housing 1 inside which a Venturi tube is placed, a fitting for introducing gases 2, a spraying device 3 for supplying black liquor for irrigation, a spraying device 4 for supplying white liquor for irrigation, a restrictive ring 5, a confuser 6 , diffuser 7, tangential choke 8 for high

 with

water from the clean gas device, a catcher 9, a nozzle for outputting white and black chips from the device 10 and 11, respectively, a pocket 12,

The device works as follows.

Black liquor is fed through a spraying device 3 and a confuser 6 and further into the diffuser 7. The gas is introduced into the device tangentially through the nozzle 2, which has the form of confuser, and under the action of centrifugal force is thrown to the wall of the housing. White liquor is fed tangentially through the spraying device 4 towards the gas stream, creating a barrier to the gas flow from drops and liquid streams.

Drops of white liquor coming out of contact with the gas hit the walls of the housing 1, confuser 6 and the restrictor ring 5, coagulate and flow into the pocket 12 with a thin film, from where white liquor saturated with sulfur compounds is fed to cooking through fitting 10. Gas after contact with white liquor it is cleaned from hydrogen sulphide and methyl mercanthan and, by bending the confuser 6 and the restrictive ring 5, comes into contact with drops and jets of black liquor coming out of the spraying device 3, is purified from hydrogen sulphide and methyl mercanthan, and also from imethyl sulfide and dimethyl disulfide, which are not trapped in white liquor. The gas-liquid stream then enters the diffuser 7. In the expanded part of the diffuser, the flow rate decreases, the sprayed black liquor moistens the gas and absorbs sulfur compounds not absorbed during the initial contact of the gas with black liquor in the volume of the confuser 6 and the restrictor ring 5. Next, the gas-liquid mixture passes A user drip catcher 9 (the louvers are conventionally not shown in the drawing), where the separation of liquid drops occurs, and is emitted into the atmosphere.

Thus, the invention provides an increase in the efficiency of the device by increasing the mass exchange between the gas and the liquid, with the possibility of cleaning the gas with different liquids in the same apparatus without displacing them; improving the reliability of the device when changing loads on the liquid and gas.

In the prototype, only whole-flare nozzles are used, allowing to create an ejection effect at a high contact surface, but when the load on the fluid changes, the nozzle stops cleaning gas emissions, and at the same time it is necessary to make the hydraulic fluid more powerful than 20–40 m / s. resistance

0.6-1.0 MPa, which is associated with higher pressure pumps,

In the proposed device, any spray device can be used, and the tangential introduction of gases into the device and the barrier created from its path from drops or jets of liquid allows, due to friction on the internal surfaces of the device, to stabilize its operation when the gas and liquid loads change.

A turbulent phase contact surface is formed due to the fact that: at the first stage of phase contact, as the gas enters the device, the gas comes into contact with the liquid droplets and jets created by the slit nozzle, with a simultaneous mass exchange process on the liquid film inside walls in pocket. At the second stage of contact, when a gas enters the confuser, the gas comes into contact with a conical stream of liquid, passes through it, partially splashing it in its path, and then passes through a barrier of liquid drops formed by the reflection of a cone-shaped

jets from confuser walls. In the third stage of contact in the diffuser, the gas loses its velocity and is finally washed from the contaminating elements with a spray liquid.

Claims (1)

Apparatus of the Invention A device for the purification of gaseous emissions from sulfur-containing compounds, including a housing, located inside it. a venturi tube to form a pocket for collecting fluid with the wall of the housing, a spray device, a drip tray, inlet and outlet gas and liquid choke, characterized in that the purpose of increasing the efficiency and reliability of the device due to the creation of a turbulized contact surface of the phases, the device is equipped with a restrictive ring that prevents mixing two irrigating liquids installed on the confuser, an additional tangential liquid inlet fitting with a slot nozzle installed diametrically opposite to the input fitting gas, while the spray device is made in the form of a cone-slot nozzle, and the gas fitting is made with the narrowing of the body. ъ one figure 1 ttfcj