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Appendices to the relevant subsections of Section 2.

“Quantitative and qualitative composition of emissions of pollutants into the air from the main technological processes”

Appendix 2.2.1.

Dust formation during mechanical processing of wood [1, 6]

The dispersed composition of dust generated during the main processes of mechanical processing of wood [6]

Appendix 2.2.3.

The content (Kp,%) of dust in the waste during various technological processes of wood processing [6]

Recommended air flow rates for moving chopped wood [19]

Characteristics of dust collecting equipment used in the woodworking industry [1, 6, 25, 31]

Supporting material for calculating pollutant emissions from woodworking

but). Recalculation of volumes of wood waste [46].

Recalculation of volumes of wood waste from a folding or bulk measure to a dense one.

Various types of wood waste, collected and laid in a certain order, occupy a large volume compared to the volume that these same waste occupied in a dense mass.

The ratio of the folding density of wood waste to the density of wood (at the same humidity) is called the fill factor of the overall volume or the coefficient of full wood. The coefficient of full wood (Кv) is given in table 2.2.6.1.

The volume of wood waste in a dense mass, m3, is determined by the formula:

Vpl = Vcl. • K

where: Vskl. - the amount of waste measured in a folding measure;

Vpl - the amount of waste measured in dense mass.

Table 2.2.6.1.

Bulk mass and full wood of crushed wood materials [1, 46]

With a decrease in particle size from 200 to 40 μm, the bulk bulk density of dust increases from 100 to 250 kg / m3.

b) Recalculation of the mass of wood waste from a folding measure to a dense one:

where is Mskl. determined by table. 2.2.6.2.

Table 2.2.6.2

The mass of firewood by breed [19, 45]

where: Hg - amount of wood waste, expressed in tons of natural fuel;

Mp
- volumetric mass of dense wood of the corresponding species (kg) is determined by the table. 2.2.6.3.

Table 2.2.6.3

Bulk mass of wood of various species [1]

d). Determination of the load factor of the aspiration system.

The determination of the gross amount of wood dust through the maximum concentration of the pollutant and the volumetric flow rate of the gas-air mixture per unit time without taking into account the load factor of the suction systems leads to overstatement of the results. Often, when reporting on form 2 TP (air), this factor is not taken into account. Therefore, when determining the gross emissions of wood dust, it is advisable to take into account the loading coefficient of aspiration systems. A useful volume of aspiration air is that which is removed from the working body when crushed waste is emitted [1, 3].

For each suction system determine the load factor:

where: Qvi - air flow rate for each suction of technological equipment connected to the system, m3 / hour;

T is the operating time of the system;

ti is the operating time of the equipment (each organ of the technological equipment), hours.

Experimental studies conducted by IVANOVSK VNIIOT showed that the annual utilization rate of aspiration systems is approximately 0.4 - 0.5. Thus, over the year, on average, 50% of the air is sucked off by the existing suction systems from woodworking shops, and air is removed from all equipment, regardless of the actual simultaneity of operation.

Appendix 2.2.7.

The content of free phenol, formaldehyde, acetone in the adhesive materials used in the manufacture of chipboard, plywood furniture, joinery [9, 11, 12, 13, 14, 15, 21, 22, 23, 35, 40, 41, 47, 48, 53, 54]

The content of free formaldehyde and phenol in resins of foreign brands [9, 11 - 15, 21 - 23, 35, 40, 41, 47]

Amount of non-polymerizable and volatilizable components in some aqueous dispersions

Composition of impregnating resins and varnishes in the production of synthetic films [6, 43]

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