Dust-collecting plants

Every dust collection plant with its ancillary equipment must be properly operated and serviced so as to enable it to perform its duties at all times. The manufacturers of such plant should accordingly, when erecting and commissioning it, supply the user with the following documents ... 

The altitude of a layer of the dynamic foam formed in dust-collecting plant at a certain relative difference of speeds of gas and liquid phases, decreases in process of growth of viscosity of a liquid [15] that calls decrease in efficiency of a dust separation, it is necessary to consider that the similar effect refers to also to a layer of an intensive barbotage and the drop layer partially strained in dust removal systems. 

Belevitsky, A. M. Economy and Technical and Economic Optimisationof Dust-Collecting Plants (on an Example of Installations of Cyclonic Dust Separation) Help Supervising Material. Clearing of Gas Emissions L. 1982. 

Air cleaning systems are often used to remove dust or vapors from plant or process exhaust streams. Dust collecting systems such as filters or electrostatic precipitators that handle heavy loads of dust are usually designed to be self-cleaning, but it is stiU. necessary to enter the air cleaner periodically for inspection or repair. Dust deposits inside the equipment are likely to be stirred up and inhaled by unprotected workers. Baghouses are particularly likely to cause exposure because large amounts of dust may be retained in the cloth and released when the bags are handled. 

Environmental Pollution Control. The cement iadustry has had an iatensive program of capital expenditure to iastaH dust collection equipment on kilns and coolers siace the 1970s (60). Modem equipment collects dust at 99.8% efficiency. Many smaller dust collectors are iastaHed ia aew plants (61). 

Typical applications in the chemical field (Beaver, op. cit.) include detarring of manufactured gas, removal of acid mist and impurities in contact sulfuric acid plants, recovery of phosphoric acid mists, removal of dusts in gases from roasters, sintering machines, calciners, cement and lime Idlns, blast furnaces, carbon-black furnaces, regenerators on fluid-catalyst units, chemical-recoveiy furnaces in soda and sulfate pulp mills, and gypsum kettles. Figure 17-74 shows a vertical-flow steel-plate-type precipitator similar to a type used for catalyst-dust collection in certain fluid-catalyst plants. 

Kane, John M., Guideposts Tell Flow To Select Dust Collecting Equipment," Plant Engineering, November 1954. 

The primary mechanism for conveying dust-laden air to a central collection point is a system of pipes or ductwork that functions as a pneumatic conveyor. This system gathers dust-laden air from various sources within the plant and conveys it to the dust-collection system. 

Irregular Plant maloperation Process plant Dust and fume extraction plant Flare stack Emergency/occasional flaring Plant failure Process plant — emergency venting Extraction/collection plant (cyclones, precipitators, filters, scrubbers)... 

While much work has been done establishing a data base showing expected ranges and profiles of the inorganic compositions of a number of cotton plant parts and dusts collected in cotton textile plants, much more work is needed to establish if any of these are at concentrations which could cause health problems. Establishment of methods to predict the origins and levels of the various components of cotton dust is also important. 

The location of dust collection system air handling plants external to manufacturing building... 

S.P. Artyushin, "Dehydration and Dust Collection in Coal Concentration Plants ... 

For the latter type of plant, it was found that the particulate concentration did not correlate with PCDD/F emissions. Only two parameters elicited statistically meaningful correlations the furnace temperature and the carbon content of the filter dust collected in the ESP. 

Effective use of these pigments can be best made if they are adequately dispersed in the syrup. Obviously, it is more difficult to disperse pigment than it is to dissolve dye. The dusty nature of pigments sometimes requires the use of air filtration and dust collection systems to avoid contamination of other areas of the plant. 

---