RU17140U1 - FILTER-ABSORBING BOX - Google Patents

Description

Filter-absorbing box

The utility model relates to personal protective equipment for respiratory organs of the civilian population - adults and children from accidentally chemically hazardous substances of inhalation action (AHOVID) of toxic substances (S) and aerosols, in particular, to the manufacture of absorbent gas mask boxes.

Known filter-absorbing box for - civilian and children's gas masks GP-7k. The box is equipped with a filter and a carbon-based catalyst with the addition of copper, chromium and silver oxides with a moisture content of up to 3%. The disadvantage of this box is the inability to use it to protect against ammonia. To ensure protection from ammonia, an additional cartridge ДПГ-3 is attached to the GP-7k box. Catalog “Industrial personal protective equipment for respiratory and skin organs. Khimkonvers OJSC, Moscow, 1997, p. 22-23, containing a HPA ammonia absorber with a moisture content of up to 5%, which causes an increase in the mass and overall dimensions of the absorbing system.

As a prototype of a utility model, a box is selected that has the multivalency of protection simultaneously from harmful vapors and gases of various chemical nature, for example, carbon monoxide, acid gases, ethylene oxide, mercury vapor and others. The absorbing box consists of a housing with a bottom and a three-layer charge, the layers of which are separated by grids RU 2111028 C1, priority 18.09.96 publ. BI No. 1420.05.98. The charge of such a box contains layers consisting of: the first layer is a catalyst (coal with additives of copper, chromium and silver oxides), the second layer is a carbon-based ammonia absorber, the third layer is hopcalite.

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The disadvantage of this box is the lack of protection against toxic substances (OM), such as chlorocyan, phosgene, chlorine, lack of protection against aerosols (dust, smoke, fog).

The inventive utility model is aimed at solving the problem of creating a filter-absorbing box that protects against toxic substances, AHOVID of various chemical nature and aerosols.

The problem is solved as follows.

A filtering and absorbing box for a gas mask containing a housing with a bottom, an aerosol filter, a multilayer charge with separation grids, which includes catalyst K (coal with the addition of copper, chromium and silver oxides) and an ammonia absorber based on carbon-based HPA (coal with the addition of chloride nickel), the moisture content of which does not exceed 1%, are taken in the ratio of the layers in the mass parts of HPA: K-1: (0.8-b1).

The proposed filter-absorbing box is shown in the drawing. The filtering-absorbing box consists of a housing with a bottom 1, an aerosol filter 2, a multilayer charge with separate nets 3. The charge includes a catalyst 4 and an ammonia absorber 5.

The layers along the air are placed in the following sequence: the first catalyst 4 (K), the second ammonia absorber 5 (HPA).

The coal base of the catalyst 4 and the absorber 5 with a low moisture content provides high sorption activity for organic gases and vapors.

The low moisture content of the catalyst 4 allows you to stabilize the protective power of toxic substances such as chlorocyanine. For example, the protective action time of catalyst K with a moisture content of 5% for chlorocyanine is 15-16 minutes, with a moisture content of 3% - 20-22 minutes, with a moisture content of up to 1% - 25-28 minutes,

Between the layers of the charge place a separation grid - silicate fabric, which eliminates the movement and mixing of the layers with equipment and evens the gas front, which leads to an increase in the protective characteristics of the box.

To study the proposed box, a gas-air mixture of various compositions was passed through the charge and the protective action time was determined.

The results of the study are presented in table 1. Table 1

Note: Moisture content of the mixture is not more than 1%; air volumetric velocity m3 / s; relative air humidity 50-75%; air temperature 18-23 ° С.

Studies of the box showed that the optimal ratio of the layers of the HPA: K mixture in May. hours is 1: (0,8-N).

With a component ratio of 1: 1.2 and 1: 1, respectively, protective indicators for ammonia and mercury vapor decrease due to a decrease in the amount of HPA, but protection for acid gases and vapors increases.

The decrease in the catalyst content at a ratio of 1: 0.6 reduces the time of the protective action of toxic substances, because the working layer decreases and, at high concentrations, “OM probing is possible.

A brief description of the proposed box and analogues are shown in table 2.

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table 2

Note: Drager box, Germany 620A2B2E2Hg-P3

EN 141/143

The moisture content of the mixture is not more than 1%; air volumetric velocity m2 / s; relative air humidity 50-75%; air temperature 18-23 ° С.

Thus, due to the composition of the charge, placed in a single housing, and a certain sequence of separated layers, as well as low moisture content, the proposed filter-absorbing box allows to reduce the overall dimensions of the gas mask and

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expand the multivalency of protection at the same time from a large list of harmful substances.

The proposed box can also be used in sets of industrial gas masks.

An experimental batch of boxes in a set of industrial gas masks PFSG-98 (VK brand) passed operational tests at Permnefteorgsintez OJSC, Mineral Fertilizers JSC, Perm Halogen OJSC, which showed reliable protection of human respiratory organs and the proposed box is recommended for testing for GO purposes and emergency.

General CJSC “Sorbe”

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Yu.A. Romanov

Claims (1)

A filtering and absorbing box for a gas mask containing a housing with a bottom, an anti-aerosol filter, separation nets and a multilayer charge including layers sequentially along the air: a carbon-based catalyst with the addition of copper, chromium, silver oxides and a carbon-based ammonia absorber with the addition of nickel chloride , characterized in that the layers of the charge: the ammonia absorber on a carbon basis and the coal-based catalyst with additives of copper oxide, chromium, silver and a moisture content of not more than 1%, are taken in the ratio in mass x parts 1: (0.8-1) respectively.