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Annexes to the relevant subsections of section 2.

"The quantitative and qualitative composition of emissions of pollutants into the air from the main technological processes"

Appendix 2.2.1.

Dust formation during machining of wood [1, 6]

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

Appendix 2.2.3.

Content (Kp,%) of dust in wastes at various technological processes of wood processing [6]

Recommended airflow rates for moving chopped wood [19]

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

Auxiliary material for calculating emissions of pollutants from woodworking production

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

Recalculation of volumes of wood waste from storage or bulk measure to dense.

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

The ratio of the storage density of wood waste to the density of wood (with the same moisture content) is called the fill factor of the overall volume or the wood density coefficient. 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: VCL. - the volume of waste measured in storage;

Vpl. - volume of waste, measured in dense mass.

Table 2.2.6.1.

Bulk weight and wood content of shredded wood materials [1, 46]

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

b) Recalculation of the mass of wood waste from the storage measure to dense:

where mskl. is determined by the table. 2.2.6.2.

Table 2.2.6.2

Mass of firewood by species [19, 45]

where: Рт.н.т. - amount of wood waste, expressed in tons of natural fuel;

Mpl
- the bulk density of dense wood of the corresponding breed (kg), is determined by the table. 2.2.6.3.

Table 2.2.6.3

Bulk weight of wood of various species [1]

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

The determination of the total amount of wood dust through the maximum concentration of the pollutant and the volume flow of the gas-air mixture per unit of time without taking into account the load factor of the aspiration systems leads to an overestimation of the results. Often, when drawing up reports on form 2 TP (air) this factor is not taken into account. Therefore, when determining the gross emission of wood dust, it is reasonable to take into account the load factor of aspiration systems. The usable volume of aspiration air is the one that is removed from the working body when crushed waste is released [1, 3].

For each aspiration system determine the load factor:

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

T is the system operation time;

ti is the operation time of the equipment (each organ of the process equipment), hour.

Experimental studies conducted by Ivanovo VNIIOT have shown that the annual load factor of the aspiration systems is approximately equal to 0.4 - 0.5. Thus, on average 50% of air is sucked off by existing suction systems from woodworking workshops for a year, and air from all equipment is removed, regardless of the actual simultaneity of work.

Appendix 2.2.7.

The content of free phenol, formaldehyde, acetone in adhesive materials used in the production of particleboard, plywood furniture, joinery and construction products [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-polymerized and volatile components in some aqueous dispersions

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

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Annexes to the relevant subsections of section 2.

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