Principles of ventilation plants with toxic secretions
When designing ventilation in workshops with toxic hazards (some shops the chemical industry, production of plastics, electroplating shops, etc.), economic issues are secondary. The main point here, the sanitary condition of industrial premises.
Our sanitary rules and regulations, and guidelines for the design of ventilation regulate only the minimum necessary arrangements for ventilation. This should be borne in mind in particular when selecting design speeds job openings in shelters.
In workshops with the release of poisonous and harmful gases, vapors, aerosols, to prevent their spread around the room should be provided, as a rule, shelters and the local pumps. General exchange ventilation permitted sanitary standards only in cases where the local suction device is impossible. Reservation, however, that the allocation of very toxic substances (with a possible concentration below 1 mg/m3) general ventilation should not be applied. The only correct way in this case, placement of equipment in isolated areas (booths) with adequate ventilation in them.
The introduction of local shelters and local suction for ventilation plants with toxic hazard - one of the main tasks of experts on ventilation, particularly when designing new production of chemical technology.
In many cases, local shelters with appropriate suction devices may be n must be designed to create machines and devices designed for new productions.
Conclusion devices in the cabin without a visit to their rights has long been used and some areas of chemical technology. Let us consider this method in detail, using the above figure. 7.
Cab in which encapsulation equipment, may be an area of 4.6 m2 and 100 x2. Dimensions and layout of the booths are dictated by the convenience of placing the equipment and the need for output control mechanisms outside the cabin. If placed in the cabin equipment works automatically and requires no inference in the corridor management arrangements, the layout is dictated only by convenience of location related to the protection of labor.