The use of industrial wastes from machine-building enterprises as packing materials for small-sized absorbers for gas emissions purification

Abstract

The paper covers the prospects to use industrial wastes from machine-building enterprises, appearing while machining various steel grades, as packing materials for industrial absorbers for environmental cleaning processes of gas emissions. The article provides obtained and processed in the criterial way experimental data in hydrodynamics of a packing material sample from metal working machines wastes appearing while treating Aisi 316Ti steel bars; packing material according to the classification method for processing experimental data λ=f(Rem) is oriented to the absorption process during selective gas cleaning in environmental equipment. The authors have compared the studied packing material to the packing that are widely used in industries. The authors have studied the main experimentally confirmed hydrodynamic effects indicating the high efficiency of the proposed packing material. The authors have made calculations for a small-sized industrial absorber for cleaning gas emissions with the use of the studied packing material.

Modelling and calculation of a small-size evaporation cooling apparatus for industrial recirculated water with a heat-and-mass exchange packing based on wastes from metal-working machinery

“…The analysis of the provided experimental data (ref. to Table 1) and comparison with the performance of the packing contact devices that are widely used in the industry [58][59] make it evident that the studied packing material ensures a high permeability of the packing block (Low values of specific flow resistance) and even organization of the liquid flow mode through the layer of the packing materials with different density of irrigation and besides ensures a relatively high liquid retaining capacity [51,52,54]. A rather high efficiency of the studied material with regard to heat-and-mass exchange performance has been experimentally proved (ref.…”

“…The most important experimentally confirmed property is the capacity of the studied packing material S-Aisi 304ε-0,95 (ε=0,95, σ=160 m 2 /m 3 ) to develop an intensive droplet flow mode by the whole height of the packing block. (Droplet-film flow mode with prevailing droplets) Thus, the method for engineering calculation of heat-and-mass exchange packing blocks in intensive droplet flow modes [51,52,60] that is shown in the block diagram in Figure 4 can be applied for calculation of an industrial evaporation cooling apparatus. The results of calculation of the main process parameters and dimensions of the small-size industrial evaporation cooling apparatus are provided in Table 1.…”

“…Papers [4,9,10,51] demonstrate that spraying units having fibre structure and having high values of porosity and specific surface are very promising in this sphere. An important feature of such fibre structure is that it is simple and easily manufactured [51][52][53]. We regard use of fibre structures, i. e. wastes from metal-working machinery produced in the course of processing of stainless alloyed steels [51][52][53][54][55][56] (that are resistant to weather and aggressive actions), or polymer threads of different thickness and section, i. e. wastes of synthetic fibre manufacturing plants [51], as one of the most promising energy-and resource saving trends for designing and manufacturing of evaporation cooling apparatuses and packing contact blocks.…”

“…An important feature of such fibre structure is that it is simple and easily manufactured [51][52][53]. We regard use of fibre structures, i. e. wastes from metal-working machinery produced in the course of processing of stainless alloyed steels [51][52][53][54][55][56] (that are resistant to weather and aggressive actions), or polymer threads of different thickness and section, i. e. wastes of synthetic fibre manufacturing plants [51], as one of the most promising energy-and resource saving trends for designing and manufacturing of evaporation cooling apparatuses and packing contact blocks. Packing materials in the form of packaged blocks of wastes from metal-working machinery (metal shavings) feature a range of important structural and surface properties [51][52][53][54][55][56], i. e. they have a curly structure with microroughness and chips on the surface.…”

“…Such structural and surface features intensify heat-and-mass exchange processes occurring between recirculated water and upward air stream and meet the requirements for evaporation cooling of industrial recirculated water with regard to the organization of liquid and air (gas) flows with respect to each other. Such materials can be easily used to form cubic or rectangular blocks (cylinder-shaped form of packing blocks is even easier to be created [51][52][53][54][55][56]) with dimensions approximately 200-600 mm that allows visual control of their internal structure. If necessary, the block can have the required stiffness if it is placed in a wire cage.…”