JPS5835086B2 - Deodorizing equipment for gas containing hydrogen sulfide - Google Patents

Description

[Detailed description of the invention] The present invention relates to a deodorizing device for hydrogen sulfide-containing gas.

Generally, deodorization of malodorous gases is carried out by absorbing and removing odor components using acids and alkaline solutions, and in particular, alkaline solutions are used to absorb and remove odor components consisting of sulfur compounds.

However, when the concentration of the sulfur compound is high, a situation often arises in which the sulfur compound is re-dispersed into the gas phase during neutralization treatment when draining the absorption liquid.

On the other hand, the sulfur compound as the odor component is often hydrogen sulfide, and the purpose of deodorization can often be achieved by removing hydrogen sulfide.

Based on the above points, the present inventor has conducted extensive research to remove hydrogen sulfide from malodorous gases, and has focused on the fact that hydrogen sulfide is decomposed into elemental sulfur by ultraviolet rays, and has developed the device of the present invention. reached.

That is, in the present invention, a porous support such as a wire mesh is stretched obliquely inside the main body of the apparatus, and an ultraviolet lamp is removably disposed directly on the surrounding wall so as to irradiate the porous support. The gist of the present invention is a deodorizing device for hydrogen sulfide-containing gas, which is configured to allow hydrogen sulfide-containing gas to flow from above to below.

Hereinafter, the apparatus of the present invention will be explained in detail using the accompanying drawings.

FIG. 1 is a schematic side sectional view showing one embodiment of the device of the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG.
FIG.

In Figs. 1 to 3, reference numeral 1 denotes a deodorizing device main body according to the present invention, in which a porous support 2 such as a wire mesh is stretched, and an ultraviolet lamp 4 is directly disposed on an outer peripheral wall 3 in a detachable manner.

The porous support 2 in the present invention has the function of collecting elemental sulfur generated when hydrogen sulfide is decomposed by ultraviolet rays through the reaction of the following formula, and precipitating the elemental sulfur on the surface of the porous support 20. It is intended to act as a reaction medium for the reaction.

2H2S+02+hν→2H20+2S (elemental state) Therefore, as shown in FIG. 1, it is important to stretch the porous support 2 at an angle to increase the area and to make it easier to receive ultraviolet rays. Further, the hole size is preferably about 4 meshes in the case of wire mesh, for example.

Further, the ultraviolet lamp 4 of the present invention is arranged directly on the surrounding wall 3 in order to improve the transmittance and utilization rate of ultraviolet rays, and to remove elemental sulfur adhering to the surface of the ultraviolet lamp 4. It can be attached and detached freely.

An example of this removable arrangement method is shown in FIG.

In FIG. 3, 5 is a mounting screw for the ultraviolet lamp 4, and 6 is a rubber gasket that brings the surrounding wall 3 and the ultraviolet lamp 4 into close contact.

The mode of operation of the device of the present invention having the above structure will be explained with reference to FIG.

Although FIG. 1 shows an example in which two apparatuses of the present invention are used, the present invention is not limited to this, and one or more apparatuses may be used.

The main body 1 of the device of the present invention is connected to the duct 7 from the generation source (not shown).
The hydrogen sulfide-containing gas introduced into the interior is decomposed by the ultraviolet rays emitted from the ultraviolet lamp 4, converted into elemental sulfur, and removed. After that, it is extracted from the duct 10 to the outside of the system.

On the other hand, the above elemental sulfur is formed on a porous support (wire mesh in this case).
It is collected on 2.

Hydrogen sulfide in the gas is adsorbed on the surface of the elemental sulfur collected on the wire mesh 2, and precipitation of elemental sulfur also progresses on the surface of the wire mesh 2.

The elemental sulfur collected and precipitated on the wire mesh 2 grows in various forms such as needle-shaped crystals, and when it reaches a certain size, it may fall off naturally. It is removed mechanically or chemically on a regular basis.

Elemental sulfur that naturally falls off or scatters is collected by the filters 9t and 92, but when processing a gas containing hydrogen sulfide at a high concentration, a large amount of elemental sulfur naturally falls off or scatters. Therefore, it is desirable to install a cyclone (not shown) in the duct 8 to collect the sulfur.

As explained above, according to the device of the present invention, hydrogen sulfide in hydrogen sulfide-containing gas can be removed by a dry method using only ultraviolet irradiation, so there is no need for any special chemicals, and there are concerns about secondary pollution due to wastewater treatment. At the same time, it has the effect of being able to recover sulfur.

In addition, the device of the present invention can be used with conventional deodorizing devices (for example, pulp,
If used as a pre-treatment device for deodorizing equipment for exhaust gas from chemical, leather, etc. factories, the load on the deodorizing equipment can be reduced.
This can contribute to improving the deodorizing efficiency and extending the period of use of the deodorizing device.

Next, examples of the present invention will be given.

Example Using the experimental apparatus shown in Figure 4, hydrogen sulfide was added at 50 ppm.
When a gas containing
m.

In addition, in Fig. 4, the experimental apparatus main body 1 has an inner diameter of 30 mm.
, two wire meshes 2 made of chrome plating were installed at an angle as shown in the figure, and the ultraviolet lamp 4 was
．． 6 to W (effective wavelength 257 mμ) to the device main body 10.
Two of them are installed on each side, and line 7 is the inlet for the above-mentioned gas to be treated, and line 8 is the outlet for the treated gas.

[Brief explanation of drawings]

FIG. 1 is a schematic side sectional view showing an embodiment of the device of the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG.
FIG. 4 is a schematic perspective view of the experimental apparatus used in the embodiment of the present invention.

Claims (1)

[Claims] 1 A porous support such as a wire mesh is stretched in a tilted manner inside the apparatus main body, and an ultraviolet lamp is removably placed directly on the surrounding wall so as to irradiate the porous support, and the processing gas is directed from above to below. A deodorizing device for hydrogen sulfide-containing gas.