SU1627785A1 - A device used for the purification of waste oxygen-containing gases from organic admixtures - Google Patents

Abstract

The invention relates to devices for the high-speed purification of oxygen-containing waste gas from organic impurities and carbon monoxide, and can be effected in those industries where organic emissions are generated. The aim of the invention is to increase efficiency and reliability, reduce flow resistance, simplify the design and manufacturing technology. The proposed device comprises a cylindrical case 1, a block 2 of cameras with a shell 3, quartz halogen thermo-illuminators 6 fixed to electric leads 7, cylinders 14 made of electrically conductive material with open areas covered with a natalizator film. The waste oxygen-containing gas enters stepwise expanding 9 and narrowing 10 chambers of block 2, in which impurities come under the selective combined effect of radiation and catalyst quanta. 2 Il. jfj & (L 7 0 i h | 00 el / phi, J

Description

. You will relate to devices dd high-speed purification of oxygen-containing off-gas from organic impurities, as well as carbon monoxide, and can be used in those industries where there are emissions of organic substances to be disposed of, including ventilation emissions.

The purpose of the invention is to increase the efficiency and reliability of operation, reduce hydraulic resistance, simplify the design and manufacturing technology.

FIG. 1 schematically shows a device with a series electrical connection of the electrically conductive elements of the reactor, a longitudinal section; in fig. 2 is a view A of FIG. one.

The device contains a cylindrical case 1, a block 2 of chambers with a covering shell 3, made of electrically conductive material and insulated from the case with a circular power insulators 4 (to increase the electrical safety, the inner surface of the case 1 is covered with electrically insulating material 5) , quartz halogen thermal radiators 6, attached to the electromotive tires 7 by means of dump holders 8.

In the direction of the arrow A, along the gas flow, the 9 are stepwise expanding and 10 tapering and communicating between themselves chambers are formed by means of radial partitions 11 and concentrically, relative to the axis of the housing 1, mounted one above the other and in series with the radial clearance 12 one behind the other cylinders 13. The centrally expanding chamber 9 has a circular cross section, and the steppedly converging chambers 10 adjacent to it in the radial direction have cross sections of a circular sector truncated by an arc of a circle. amers a larger radius will be stepwise tapered (not shown). In such a combination, a number of device sizes can be manufactured for high expenses for exhaust gas.

Peripheral cylinders with respect to the enclosing shell 3 blocks are perforated (for example, mesh). The inner surface of the shell 3, the surface of the cylinder 13 and the radial partitions 11 are covered with a catalyst film. In this case, the peripheral perforated cylinders 13 provide thermal radiation to the inner surface of the shell 3.

Thermoradiating tubes are concentrically clad with a gap between cylinders 14 of electrically conductive material with open areas that are covered with a catalyst film and fixed to the insulators of lamp holders 8 and connected to the power supply wires. The open areas provide irradiation of the catalyst surfaces of the cylinders 13 and partitions 11. Electric power is supplied to the device sequentially via terminal 15 to the block of chambers, then tires 16 to cylinders 14 and from the opposite end through tires 7 to thermal radiators. The arrow shows the view of the current-removing tires 17 from thermal emitters 6.

Cylinders with open areas are made of various options: mesh, perforated, spiral, longitudinal-cavity, etc. For on-site installation, paws (not shown) or a flange device 18 can be welded to the case, allowing the device to be mounted or removed for thermoelectric radiators, etc. A device for cleaning the waste oxygen-containing gases is installed in the gap of the flue and is connected to it by means of flexible hoses.

The device works as follows.

The waste oxygen-containing gas without preheating enters the channels of block 2, in which asymmetrical organic impurity molecules, including carbon monoxide, come under selective, continuous combined exposure to radiation and catalyst quanta, since the main components of the gas (Nz, 02, H and t. e.) are symmetrical molecules and practically transparent to light. During the residence time in the channels, the impurities are neutralized to CO l and H-0 due to their deep oxidation, the radiation comes from both the heat radiator, which creates a radiant flux in the visible light region and in the near infrared (IR) region, and from the catalyst film protruding as a secondary radiator. Since the catalyst includes a specific set of metal oxides, radiation is already provided in the middle and far infrared region. Thus, together, a thermal radiator and a catalyst provide for the resonant interaction of radiation quanta with all the bonds in the impurity molecule, facilitating its activation and oxidation occurring both on the surface and in the bulk through the so-called heterogeneous-homogeneous mechanism, which flows through a chain mechanism due to the continuous formation of active particles (radicals, ions, etc.).

The reliability of the process is greatly enhanced by setting the chambers block under electrical voltage. When the temperature rises under the influence of IR radiation, the catalyst film-semiconductor increases its conductivity and, due to the alternating (50 Hz) electric current, sharply integrates sorption processes on the catalyst surface.

The catalyst radiation on the cylinders of thermal radiators at elevated temperatures compared with the temperature of the catalyst on the walls of the chambers located on large radii of the thermal radiator contributes to the intensification of the deep oxidation process. Passing through the cylinders 14 of alternating electric current, in addition to the intensification of sorption processes on the catalyst surface, creates an electromagnetic field that also contributes to the intensification of the process and increase the reliability of the proposed device.

The exhaust gas can pass through the channels of the block at high speeds (up to 40 m / s) depending on the available pressure margin. Stepwise expanding 9 and tapering 10 and interconnected channels ensure the passage of any impurity particle near a high degree of radiation intensity and catalyst surface, which guarantees the maximum conversion percentage.

Claims (1)

Invention Formula five A device for purifying waste oxygen-containing gases from organic impurities, including carbon monoxide, containing a housing installed in it, enclosed in a shell and an electrically insulated block of chambers made of conductive material coated with a catalytic film, quartz halogen thermal radiators discretely coated with a catalytic film and fixed by lamp holder - telephones along the axes of the chambers, and at one end of the chamber and thermal emitters are separately connected to the power supply wires by electrically conducting tires , and at the other end are connected by a common electrically conductive bus, which is, of course, the fact that, in order to increase efficiency and reliability 0 operation, reducing the hydraulic resistance, simplifying the design and manufacturing technology, the chambers are made of cylinders of different diameters arranged concentrically 5 with a radial gap, and radial partitions, the peripheral cylinders are perforated with respect to the enclosing shell and the catalyst film is discretely applied to 0 cylinders of electrically conductive material, worn with a gap on thermal emitters and connected independently by their ends to the power supply wires. Type A / 7 18 eleven FIG. 2