Fume extraction System
Shivas offers customized solutions for fume extraction
in the form of tower scrubbers, complete with FRP ducts and dedicated FRP
blowers. All the components of the plants are made from corrosion-resistant
Thermoplastic material. The system uses FRP Scrubbers to exhaust the air,
preventing release of aggressive and harmful vapors into the environment.
This process is designed to extract smoke, fumes and gases directly from
source, before the contamination spreads in the premises.
The fume Extraction plants from Shivas reduces the overall dimensions and
allows a full personalization of the units depending on the pollutant and on
the system demands. Different for fume extraction system includes Acid Proof
Fume Extraction Plant, Plastic Tanks Acid Plant, Plastic Plant for
We supply Maximum Achievable Control Technology (MACT) in compliance to
emission regulatory agency requirements.
Shivas has developed an innovative line of fume extraction plant for
encapsulated pre-treatment and lateral suction channels. The lateral suction
channels extracts smoke, fumes and harmful emission right at source on
pickling tanks. Performance of Fume Extraction Plants is as per emission
We specialize in providing turnkey solutions for extraction of corrosive
fumes and gases across diverse industries. These plants enable the
manufacturers to meet the environmental protection norms laid down by the
regulatory bodies. Some of the features of our extraction plants include the
- Ensures healthy working conditions
- High separation efficiencies of 1 micron particulate and gaseous
emissions are achievable
- Customized plants and process equipment for metal finishing
The fume extraction plants work by scrubbing the exhaust air, preventing
the release of aggressive and harmful vapors into the environment. Vapours
and gases are absorbed in the scrubbing liquid and returned to the circuit.
The most important basis for calculations are the determination of the
exhaust air volume and the dependence of the pre-treatment plant. All the
calculations are performed by program modules developed by Shivas.
Effective scrubbing and guaranteed compliance with emission limits can only
be achieved through an individually designed fume extraction plant optimized
on the particular application.
The Fume Extraction Plants are designed for the toughest working
environments in different industries across the globe. Every component is
made of acid proof and plastic materials. Followings are the type of
industries uses fume extraction system.
- Hot-dip Galvanizing Plants
- Pipe Pickling Plants
- Stainless Steel Pickling Plants
- Wire Pickling Lines
- Electroplating/Anodizing Plants
- Metal Finishing Industries
- Surface Treatment Plants
Shivas' fume extractor plants are specifically designed for improvement
working condition and environment in industries. These system provides a
significant advantages of less wear and tear of the machines and much lower
cleaning costs. Some of the other advantages include:
Fume Extraction system comprises of following equipments
- Clean Working Area (surrounding) .
- Hygienic working atmosphere.
- High employees' acceptance.
- Increased productivity.
- Prevents corrosion of crane & roof structure.
- Increased safety.
- Fumes are condensed & recycled, optimizing material use.
- Reducing waste disposal cost.
- Suction Hood
- Suction Dust
- Pump or Scrubling Liquid
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Gas scrubbing consists of solubising a gaseous pollutant
in a liquid. This liquid can be either water or water with a reagent or a
solvent. There are different types of gas scrubbers i.e. random packed
scrubbers, spray gas scrubbers and venturi scrubbers. The choice of which
type/model to be used depends on the characteristics of the gas to be
removed. Extraction of vapors from the surface treatment baths and treatment
Shivas will be your partner in helping 'you' choose the most appropriate
solution for the design of the fume capture and extraction systems, chemical
and mechanical engineering of the fume scrubbing unit for your needs and
assist with the installation and commissioning of the plant to an agreed
discharge concentration. In the metal process industry extract and treat the
vapors produced by the metal sheets and wires during the pickling process
such as hydrochloric acid pickling. Through extraction and treatment, we
ensure the well being of the people working with the machines as well as
compliance with all the know standards.
Shivas offers a complete range of fume scrubbing units backed by a
comprehensive design, manufacturing and installation service.
Design & Manufacture
2D & 3D mechanical design. Product design using parametric solid
modeling and photo realistic rendering. Injection moulding, plastic
extrusion, vacuum forming and rapid prototyping and vacuum casting.
Scrubbers & Degasers
|Packed Bed Types
Packed Bed Type Scrubbers and Degasers are used for removal of gas,
vapors, chemical mist etc. These scrubbers are cylindrical towers and
are packed with plastic tower packing or any-other suitable packing
material for particular application. The scrubbers are provided with a
water spraying arrangement, which can be supplied in various sizes with
gas velocities ranging from 0.5m/sec. to 2m/sec and pressure drop
between 50mmwg and 750 mmwg. Fumes / Gaseous contaminants travel
vertically upwards while caustic liquid / water is sprayed from the top,
over the tower packing. The liquid is recirculated with pump.
Additionally, packed bed scrubbers offered, mostly counter current
scrubbers, which can collect efficiently particulates up to a size of 4
- 5 micron.
Packed towers are used as contacting equipment for gas-liquid and
liquid-liquid systems. It presents a cross-section of a typical unit.
The shell is usually cylindrical, although square wooden, light metal,
or .reinforced plastic towers are used. The basic unit consists of:
- Packing (one or more sections)
- Packing support(s)
- Liquid distributor (s)
- Intermediate supports and redistributors
- Gas and liquid entrance and exit nozzles
Many of the mechanical aspects of tower construction and assembly
have an influence upon the design and interpretation of tower
performance. Every effort should be made to increase the effectiveness
of contact between the process streams and to reduce losses by
entrainment or wall effects at a minimum expenditure of pressure drop.
At the same time the design must be consistent with the economics
dictated by the process and type of construction.
The shell may be of metal (steel, alloy, or non-ferrous). plastic, wood
or some combination which may require the addition of liners or inner
layers of rubber, plastic or brick. The mechanical problems of attaching
inner nozzles, supports and brick require considerable attention that is
not an integral part of sizing the equipment.A shows a typical large
steel brick-lined-membrane fined tower with corbeled brick support
locations. In these towers, temperature and/or corrosive conditions
usually dictate the internal lining, and the selection of the proper
acid-(or alkali-) proof cements.
Ceramic, plastic and other non-metal tower shells are used quite often.
It is important to consider in ceramic construction that the main inlet
or outlet nozzles or any other large connections should be oriented 90°
to each other to reduce the possibility of cracking the walls, as most
cracks go one-half diameter. Preferably there should only be one nozzle
at any one horizontal plane. The nozzles should never carry any piping
or other stress load.
The bell and spigot type tower, is satisfactory for 2 to 2.5 psi in
12-inches diameter. to 30-inches diameter. towers when the joints are
packed with asbestos and caulking compound. For operating pressures of 5
psi in 18-inches through 48-inches diameter., use asbestos and silicate
cement?- Special hold-down packing gland-type rings will allow operation
at slightly higher pressure. The porcelain towers should be used for the
higher pressures rather than the weaker stoneware.
The rate of heating or cooling a stoneware or porcelain tower should
not exceed 15° F. per minute.
The packing is the heart of the performance of this equipment. Its
proper selection entails an understanding of packing operational
characteristics and the effect on performance of the points of
significant physical difference between the various types.. The
evaluation of these materials for various conditions of service is given
This high-efficiency Plate Scrubber is designed for absorption and
removal of soluble harmful gases such as Sulfurous Acid Gas (SOx) and
Hydrogen Chloride (Hcl), which are contained in exhaust gas, and
simultaneously remove dust from the exhaust gas. Our range of plate
scrubber is provided with a perforation plate and a baffle plate such
that the gas to contact the water efficiently. The plate finds
application for incinerating and roasting plants as well as for
deodorizing and washing purpose. In order to improve the efficiency of
gas absorption and dust collection, the plate scrubber has a mechanism
to enable an efficient contact of gases with the washing water. The
venturi enables an easy mixing of the ash contact in the washing water.
The known fractionating plate columns which are utilized for liquid-gas
contacting may be divided into two classifications:
- cross-flow plate, and
- counter-flow plate.
The cross-flow tray requires a liquid downcomer and is more
generally used than counter-flow tray because of transfer-efficiency
advantages and greater operating range. The flow pattern of the liquid
on a cross-flow tray can be controlled by varying the placement of
downcomers in order to increase stability of operation or improve
Where the liquid loading on a column is less than 60-80 gal./min-ft. of
weir, a normal cross-flow pattern with segmental outlet weir is
generally used. In the event the liquid loading exceeds 60-80
gal./min.-ft. of weir, in a column having sufficient vapor capacity,
split-flow and sometimes radial flow are used.
The fraction of column cross-sectional area available for
gas-dispersion components, such as caps or perforations, is
significantly lower in split-flow design than in cross-flow design.
Thus, for the same vapor capacity, split-flow design generally requires
a larger column diameter than normal cross-flow.
Elements used in plate towers for the purpose of gas dispersion are
bubble caps, sieve perforations, or modifications thereof.
The tray construction, wherein the liquid is maintained on the tray
surface by the kinetic energy of the vapor, is called the sieve tray.
The openings in the tray may take the form of circles or slits formed by
mechanical punching of the metal tray.
A more effective method of insuring contact between the vapor and the
reflux of a fractionating column is the use of bubble caps on the trays.
Each plate in the column has a plurality of openings and each of the
openings is provided with a short nipple. Each nipple is surmounted with
a bell-shaped cap which is secured in place by means of a spider and a
bolt. The lower edge of the cap may be serrated or provided with slots.
As the vapor rises through a nipple from the plate below, it is diverted
downward by the cap and bubbles out under the serrations or through the
slots. A layer of liquid is maintained on the plate and the depth of the
liquid is such that the caps are submerged. The downpipe from the plate
above is sealed by liquid on the plate below, so that vapor cannot enter
the downpipe. Ordinarily, the liquid is delivered at one end of the tray
by a downpipe from the plate above, flows across the tray, and is
discharged by a downpipe onto the lower tray. Baffles can be placed
between the caps to divert the liquid and cause uniform flow across the
The shortcomings of the known trays are severalfold: the
construction costs are high; there is a considerable loss in pressure as
the vapor traverses from the boiler to the top of the column; and the
undesirable transfer of entrained liquid particles through the openings
in the trays to the liquid on that tray detrimentally interferes with
the concentration differential of the liquid and the vapor.
OBJECTS OF THE INVENTION
It is an object of this invention to provide an improved gas-dispersing
It is another object to provide a simple device which can be
manufactured at a reduced cost.
It is another object to provide a device which would reduce the escape
of entrained liquid to the upper trays.
It is still another object to provide a gas-dispersing assembly having
a greater mass-transfer efficiency between liquid and vapor.
A Spray Column find applications for removal of sulfur dioxide (SO2)
from flue gas and other chemical process industries owing to its various
advantages like low-pressure drop and simplicity. Our range of spray
columns have various advantageous as they are easy to use and require
less maintenance. Manufactured from quality raw material, these columns
offer a durable and hassle-free usage. Robust in design and construct,
our range of columns are known for their high yielding performance.
Gas Absorption Plants
Optimizing on our new-generation product development
facility, we manufacture and supply gas absorption plants for emission
control of any toxic gas like NH3, HCl, HF, NOx, SO2, Cl2, Hbr, Br2, H2S,
HCN, HCHO etc. These pollution control systems are manufactured in according
to set industrial pollution control parameters. Their compliance with
requisite standards have made them reliable in the industry. All our
products are quality tested & we ensure to deliver certified air
pollution control system.
Fume Extraction System For Pickling Plants
Steel pickling plants are mainly of two types viz.
(1) Continuous pickling lines of the closed type for strips and wires
(2) Batch pickling lines of the open type for wire coils, straight tube
bundles, automobile bodies (surface pretreatment prior to painting) etc.
Induced draft type fume extraction systems are adopted for the former and
push-pull type systems are used for the latter. The surface treatment
solutions could be hydrochloric acid, sulfuric acid, hydrofluoric acid,
nitric acid, chromic acid or any other at various concentrations and
temperatures. The design of the system is aimed at protection of the
operating personnel on the one side and protection of the environment by
controlling emissions. Temperature, concentration and toxicity and partial
pressures of the vapors are considerations in system design. Our service
covers from conceptualization to design, selection of appropriate materials
of construction, manufacture, specification and procurement of purchased
items such as pumps, motors, instrumentation and control etc., supply,
erection, commissioning and handing over with guarantees for quality and
integrity of the supplies and performance of the system conforming to
Fume Extraction System For Pharmaceutical Plants
Bulk drug manufacturing plants typically comprise
several reactors. Several toxic chemicals are used in their manufacture.
Also they generate several highly toxic gases such as NH3, HCl, HF, NOx,
SO2, Cl2, HBr, Br2, H2S, HCN, HCHO and other organic and inorganic gases.
Personnel, who feed the raw materials into the reactors and operate the
plant, have to be protected from the poisonous vapors and gases. The
emissions from the plant have also to be controlled. As the gases generated
are of different types the solutions to be used for absorbing them will also
be different. As it would be expensive to use many absorption systems, the
reactors are grouped into two or more groups for the purpose of providing
fume extraction systems. The systems cover everything from retractable fume
hoods near reactors to protect personnel to final absorbers and stacks. We
also undertake trouble-shooting in existing fume extraction systems supplied
Fume Extraction System For Pesticide and Petrochemical Plants
As in the case of pharmaceutical plants we also
undertake turnkey contracts for plants for the extraction and absorption of
toxic gases in the case of any chemical industry, pesticide and
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