RU28440U1 - FILTER-ABSORBING BOX - Google Patents

Description

Filter-absorbing box

The utility model relates to personal respiratory protective equipment (PPE), in particular, from toxic substances (hydrogen cyan, chlorocyan, etc.), chemically hazardous substances of inhalation (AHOVID), organic (benzene, toluene, etc. .), acidic (sulfur dioxide, hydrogen chloride, etc.), alkaline (ammonia, amines, etc.) and neutral (chlorine, sulfur hydride, etc.) characters and aerosols.

Known gas mask box GP-7k TU G-10-1104-82. Elektrostal containing an aerosol filter and a carbon adsorbent catalyst with compounds of copper, chromium, silver and triethylene diamine RU No. 2108149 C1, cl. VO 1J20 / 20, СО1В31 / 08, 02.20.1997, which provides protection against toxic substances, AHOVID organic, acidic and neutral in nature, aerosols.

The disadvantage of the GP-7k box is the lack of alkaline protection against AHOVID.

Known filter-absorbing box "Redoubt brand K JSC" Himconverse Industrial personal protective equipment for respiratory and skin. Catalog. Moscow, 1997, p. 11, 18, containing an aerosol filter and an ammonia absorber. This box is similar in design and dimensions to the GP-7k box and protects against alkaline nature of aerosols and aerosols.

The disadvantage of the box “Redoubt brand K is the lack of absorption of poisonous substances, AHOVID acidic and neutral in nature and the low time of the protective effect of AHOVID organic nature.

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MKI A 62 V 23/02

dust swab, charge, filter element with a replaceable aerosol filter RU No. 2142298, class. A62B 18/00, 08/25/98. The charge of a small-sized box of the VK brand contains a layer representing activated carbon with copper and chromium compounds, and an ammonia absorber layer of equal volumes TU 6-00-05795731-252-96 Absorbing box of small size, set of drawings, aircraft 13339.00.00. Perm city. This box protects against toxic substances, AHOVID organic, acidic, alkaline and neutral in nature and aerosols.

The disadvantages of a filtering and absorbing box of small dimensions of the VK brand are the insufficiently high time of the protective action for toxic substances, AHOVID acidic, alkaline and neutral characters, the sequential fixation of each layer using a mesh to separate layers when the gear of the box, increased labor intensity of the equipment.

The authors were faced with the task of developing a filter-absorbing box for the absorption of poisonous substances, AHOVID organic, acidic, alkaline and neutral in nature with a sufficiently high time of protective action.

The result is achieved by the fact that:

In a box containing a body, a bottom, nets, an anti-dust swab, an anti-aerosol filter, a mixture of adsorbent — a catalyst based on activated carbon with oxides and salts of copper and chromium, and an adsorbent — an absorber based on activated carbon with nickel chloride, a mechanical mixture is used as a mixture adsorbent-catalyst and adsorbent-absorber in a volume ratio of 1: (0.8 - 1.2), respectively, and the adsorbent catalyst additionally contains silver oxide and / or triethylenediamine, and / or potassium carbonate, and / or sodium carbonate.

The proposed filter-absorbing box is shown in the drawing. It consists of a housing 1, a bottom 2, nets 3, an anti-dust swab 4, an aerosol filter 5 and a charge 6.

The difference of the proposed filter-absorbing box from the prototype is that:

- as a charge, a mechanical mixture of adsorbent - catalyst and adsorbent - absorber in a volume ratio of 1: (0.8, 1.2), respectively;

β-adsorbent - the catalyst in the mixture further comprises silver oxide and / or triethylenediamine and / or potassium carbonate and / or sodium carbonate.

Adsorbent - the catalyst in the charge provides the absorption of toxic substances, ACHOVID organic, acidic and neutral in nature.

The adsorbent - absorber in the charge provides the absorption of AHOVID organic and alkaline characters.

The mechanical mixture of adsorbents causes an increase in the length of the working layer of each of the adsorbents, and there is no need to use a separation grid between the adsorbents. In this case, the adsorbent — the catalyst and the adsorbent — absorber in the charge do not interfere with each other to absorb the corresponding substances.

A narrow range of the volume ratio in the charge of the filter-absorbing box of the adsorbent — catalyst and adsorbent — absorber, 1: (0.8 - 1.2), respectively, was taken to provide the necessary maximum mixture of adsorbents in the charge, especially for small charge layers .

The necessity of applying silver to activated carbon is due to the catalytic properties of silver compounds, for example, during the oxidation of arsenic hydrogen by atmospheric oxygen.

The use of triethylenediamine in the composition of the adsorbent-catalyst allows to increase the protective action time for a number of substances, for example, chlorocyanine at high humidity.

Potassium carbonate and / or sodium carbonate in the composition of the adsorbent catalyst acts as an additional protection against ACHOVID acidic and neutral characters.

Data on the time of the protective action of the proposed filter-absorbing box, as well as its prototype and analogues are shown in table 1, data on the selection of the ratio of adsorbent-catalyst and adsorbent-absorber in the proposed filter-absorbing box in table 2.

From table 1 it can be seen that the proposed box in comparison with the prototype has an increased protective time, in comparison with the analogue GP-7k protects against ammonia, compared with the analogue "Redoubt brand K protects against sulfur hydride, sulfur dioxide, chlorocyan and hydrogen cyanide.

From table 2 it is seen that the optimal volume ratio of the adsorbent-catalyst and adsorbent-absorber in the proposed box 1: (0.8 -1.2), respectively. A decrease in the amount of adsorbent-absorber of less than 0.8 or an increase of more than 1.2 leads to uneven distribution of adsorbents in the layer and a significant reduction in the time of the protective effect of the proposed box on one of the substances.

The proposed filtering and absorbing box with a charge in the form of a mechanical mixture of an adsorbent-catalyst and an adsorbent-absorber eliminates the sequential fixation of each layer using a grid to separate the layers when equipping the box and thereby reduce the complexity of the equipment.

The fractional composition, mass fraction of moisture, the content of copper, chromium, silver and triethylenediamine adsorbents for all boxes is similar.

 Table 1 gives the average values from the results of six tests under identical conditions:

Test conditions: Volumetric flow rate (gas) of steam-vapor flow (30 ± 0.75), relative humidity (50 ± 3)%, air temperature (20 ± 5) ° С.

Note - The volume of adsorbents is -230 cm3.

An experimental batch of filtering and absorbing boxes is manufactured and tested in laboratory conditions.

Further production of filtering and absorbing boxes for RPEs for various purposes is planned.

Yu.A. Romanov

E.A. Galkin

Utility Model Formula

1Filtration-absorbing box, including a housing, bottom, mesh, dust swab, aerosol filter and a mixture containing an adsorbent-catalyst based on activated carbon with oxides and salts of copper and chromium and an adsorbent-absorber based on activated carbon with nickel chloride, characterized in that a mechanical mixture of an adsorbent — a catalyst and an adsorbent — absorber taken in a volume ratio of 1: (0.8 - 1.2), respectively, is used as a charge.

2 Filter-absorbing box according to claim 1, characterized in that the adsorbent-catalyst further comprises silver oxide and / or triethylenediamine and / or potassium carbonate and / or sodium carbonate.

Claims (2)

1. A filtering and absorbing box including a housing, a bottom, grids, an anti-dust swab, an aerosol filter and a mixture containing an adsorbent catalyst based on activated carbon with copper and chromium oxides and salts, and an adsorbent absorber based on activated carbon with nickel chloride, characterized in that a mechanical mixture of an adsorbent-catalyst and an adsorbent-absorber taken in a volume ratio of 1: (0.8-1.2), respectively, is used as a charge. 2. Filtering and absorbing box according to claim 1, characterized in that the adsorbent catalyst further comprises silver oxide and / or triethylenediamine and / or potassium carbonate and / or sodium carbonate.