Если у вас возникли сложности с курсовой, контрольной, дипломной, рефератом, отчетом по практике, научно-исследовательской и любой другой работой - мы готовы помочь.
Предоплата всего
Подписываем
Рис.4.1 Пример построения СЗЗ предприятия и одиночного источника
Исходные данные для расчетов приведены в табл. 4.2 , 4.3.
Practice session № 4. Calculation and border of sanitary protection zone of the plant.
For all industries, CH 245-71 set SPZ, the size of which depends on the number and level of danger in hazardous substances.
In accordance with the CH 245-71 all existing plants are divided into 5 classes with the following normative dimensions (Lo):
Class 1 - 1000m Class 2 - 500 m 3 class - 300 m 100 m Grade 4, Grade 5 - 50m
Enterprises of rail and road transport are 4 or 5 class.
SPZ can not be regarded as a reserve area for development and expansion of the industrial site. On the territory of the SPZ Indoor facilities productions lower hazard class than primary production, as well as: fire stations, garages, parking lots, warehouses, office buildings, etc. On the territory of the SPZ is prohibited to place residential buildings.
To mitigate the impact of pollution on population, territory SPZ be landscaped gas resistance varieties of trees and shrubs. On the part of the housing estate landscaped strip width must be at least 50 m, and at a rate of up to 100 m SPZ least 20m.
According to the AML-86 SPZ adjusted based wind rose of the area by the formula:
, M (5.1)
where L o-, regulatory SPZ, m;
- Adjusted the SPZ, m
P - the average frequency of one wind rumba (direction),% (taken from Table. 4.1);
- average frequency of wind direction with uniform circular wind patterns,% (for vosmirumbovoy wind patterns = 12.5%).
Calculation SPZ tabulated 4.1. Adjustment only at the Point, where the ratio, otherwise the adjusted amount is taken as normative.
To construct a single source SPZ build vosmirumbovuyu rose and wire radius circle (a normative SPZ). Next on the same Point, where the ratio of the radius of the arc lay compass L, and connecting the data points on a tangent with the boundaries of the regulatory SPZ on Rumba, where L=, get adjusted SPZ.
Table 4.1 Calculation of SPZ with the wind rose
|
Rumba |
NW |
SE |
Е |
NE |
Е |
NW |
W |
SW |
|
L0,м |
||||||||
|
Р, % |
||||||||
|
Р/Р0 |
||||||||
|
L,м |
||||||||
|
Lок,м |
For the construction of GCC companies build the axes X (eastward), Y (north direction). Applied the relevant point source release of the enterprise (see Table 4.2). Radius around each point is constructed circle. Connecting on a tangent circle each receive regulatory SPZ enterprise. For each source Builds adjusted SPZ, only the points of the compass, which are aimed at the external borders of the regulatory SPZ. Connecting the data points on a tangent, we determine the adjusted boundaries SPZ.
After building the company SPZ map the residential area (residential area coordinates X = Y = 200), and that according to the location of residential buildings conditions SNIP. (Figure 4.1)
Example of the construction of the SPZ
Figure 4.1 An example of the SPZ enterprise and a single source
Initial data for the calculations are shown in Table. 4.2 and 4.3.