(BAT) Reference Document for the Production of Chlor-alkali ...

Chapter 5
5.10 Emissions of noise
19. In order to reduce emissions of noise, BAT is to use a combination of the techniques given
below.
a
Technique Description Applicability
Strategic planning of
the location of
equipment, units and
buildings
b Noise-reduction
programme
c
Operational and
management
techniques in
buildings containing
noisy equipment
d Low-noise equipment
e Noise-reducers
f Vibration insulation
g
h
Enclosure of noisy
equipment
Soundproofing of
buildings
Noise levels can be reduced by
increasing the distance between the
emitter and the receiver and by using
buildings as noise screens.
The noise-reduction programme includes
identification of sources and affected
areas, calculations and measurements of
noise levels, identification of most costeffective
combination of techniques, their
implementation and monitoring.
This includes:
improved inspection and
maintenance of equipment to
prevent failures;
closing of doors and windows of
covered areas;
equipment operation by experienced
staff;
avoidance of noisy activities during
night-time;
provisions for noise control during
maintenance activities.
This potentially includes:
compressors with Q 85 dB(A);
speed-controlled pumps;
avoidance of punched disks.
Installation of noise-reducers on
equipment and ducts.
Vibration insulation of machineries and
decoupled arrangement of noise sources
and potentially resonant components.
Enclosure of noisy equipment in separate
structures such as buildings or
soundproofed cabinets where internalexternal
lining is made of impactabsorbent
material.
This potentially includes:
sound-absorbing materials in walls
and ceilings;
sound-isolating doors;
double-glazed windows.
Noise propagation can be reduced by
inserting obstacles between emitters and
receivers. Appropriate obstacles include
protection walls, embankments and
buildings.
Applicable to new plants. In
the case of existing plants, the
relocation of equipment and
production units may be
restricted by the lack of space
or excessive costs.
Generally applicable.
Generally applicable.
Generally applicable.
Generally applicable.
Generally applicable.
Generally applicable.
Generally applicable.
WORKING DRAFT IN PROGRESS
i Noise abatement
Applicable to new plants. In
the case of existing plants, the
insertion of obstacles may be
restricted by the lack of space.
[This BAT conclusion is based on information given in Sections 4.3.8.2, 4.3.8.3 and
4.3.8.4]
284 December 2011 TB/EIPPCB/CAK_Draft_1