RIECO INDUSTRIES LIMITED

ISO 9001-2008 CERTIFIED COMPANY

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AIR POLLUTION CONTROL SYSTEMS (APC)

 

RIECO has been a pioneering name in the field of Air Pollution Control and specializes in the engineering and design, manufacturing and erection, installation and commissioning of nuisance Bagfilters, Baghouses and entire dedusting systems, Electrostatic precipitators and Scrubber systems. The Bagfilters also form parts for collection of products in SRE systems and Pneumatic handling systems.

Our systems are designed to achieve the highest performance and reliability and minimum downtown, minimum expenditure and lowest possible maintenance costs. With a backup of decades of experience, we can, not just address all routine applications but also a variety of typical and challenging applications like waste to product incinerator based applications.

 

Bagfilters, Baghouses and Dust Extraction systems

 

RIECO developed the first patented compressed air reverse jet cleaning filter combined with the use of high density felt material for gas filtration. From here we have come along way accumulating rich experience, update and advanced knowhow and extensive database.

We can offer a wide spectrum of Models and sizes suitable for your requirement, budget and applications. From an extensive range of filter media, the most suitable one is selected taking into consideration parameters like application, operating temperatures, moisture content etc. the design of the equipment is frozen based on the Customer's requirement of permissible limits for outlet emissions. The gas handled can range from plain dust, smoke to fumes.

We can design a variety of Bagfilters for Flour Mills, Boiler applications, Cassette type filters, Bagfilters with cyclonic entries as well as side and top access Models to suit the convenience of the layouts. Bagfilters to handle explosive environments can also be designed with ATEX norms and certification can be obtained for the same. The Bagfilters are normally assembled and shipped to reduce the time for their installation at site. Modular Baghouses handling large volumes of gas are shipped in panel form, to optimize transport costs and also reduce the erection time at site.

We also undertake the designing, manufacturing, supply and installations of entire Dust Extraction Systems which entails the preparation of layout of the duct routing and fabrication of the ducts to fit site conditions. This exercise involves engineering the duct design as well as that of the Hoods or dust extraction points, to ensure the required velocity is maintained and the system is balance for pressure drops resulting in the optimal performance of the entire system.



Electrostatic Precipitators (Dry and Wet)


Dry ESPs

 

descriptionThe RIECO dry Electrostatic Precipitator (ESP) can be used to extract fine dust particles from process gases up to a temperature of 400 Celsius by means of an artificial electrostatic charge. The dust-laden process gas enters the ESP horizontally, and is spread to a uniform  flow profile across the entire filter cross-section by means of a gas distribution system. By means of the high voltage applied between the corona discharge electrodes and the collecting electrodes, the process gas and the dust particles are electrically charged.

On the route through the electric field, the charged particles are transported to the collecting electrode plates by the electric field strength, where they agglomerate with the existing dust particles which are then knocked off by a motorized tumbling type Rapping Hammer System. The rapped off dust particles drop into the ESP hopper and are removed through the dust discharge system. The clean gas leaves the ESP through the gas outlet cone.

Our ESP design offer a distinct advantage of having an extremely sturdy design that ensures an installation without any physical damage for years to come. Besides this, our design comprises of very few moving/rotating components, hence very few manhours towards maintenance are required to be invested thus adding to indirect savings. This is a continuous dust collection system operating with a low pressure loss (approx. 2.5 mbar) at a high degree of separation. The Low energy costs compared to Fabric Filter separators as well as less requirement of consumables make our ESP an economically attractive proposition.

The design itself takes care of each aspect and contributes to the overall guaranteed performance. A Perfect gas distribution ensured by gas baffle plates and adjustable perforated plates ensures optimum use of the entire ESP chamber. Cleaning of the corona discharge and collecting electrodes by tumbling hammer type motor driven rapping system, and Electric heating of the hoppers of the ESP and of the dust conveying system prevent any material baking thus preventing problems of hopper jamming. We also offer variety of options of emitting electrodes in terms of MOC to suit the application as well as budgets.


WET ESPs


The Wet Electrostatic precipitator is for applications where the special dust or gas characteristics make separation difficult. The RIECO wet Electrostatic Precipitator (ESP) is reliable and unbeatable since many years in view of operational safety, long life cycle and the collection efficiency. These are excellently suited for fine dust afflicted with water drops or aerosols and emissions containing tar or oil. An added and distinct advantage is the binding and control of toxic emissions like HCl, SO2 and HF fumes.

 

descriptionThe process gas enters the wet ESP horizontally, and is spread to a uniform flow profile across the entire filter cross-section by means of a gas distribution system. By means of the high voltage (78 to 135 KV) applied between the corona discharge electrodes and the specially designed honeycomb-type collecting electrodes, the process gas and the dust particles are electrically charged. On the route through the electric field, the charged particles are transported to the honeycomb type collecting electrodes by the electric field strength where they agglomerate with the existing dust particles and are flushed off by a periodically working washing system. The drain water flows from the honey comb through the gas distribution system to the filter bottom. The purified gas leaves the filter through the gas outlet hood.

 

Scrubbers


We have an established expertise in Low Energy Scrubber for Liquids, particularly applicable for a various sectors like Steel, Foundry, Cement, Thermal power, Aluminum, Chemical, Food and Pharma industry. Scrubbers provide a versatile means of removing both particles and pollutant gases from the exhaust stream of many industrial processes. These devices use water to make small, hard-to-collect particles easier to collect by incorporating them in larger water droplets. Gases can be absorbed by virtue of their solubility in water or by adding chemicals to the water. Scrubbers can be constructed in all sizes. They can be small enough to accommodate low volumetric gas flow rates of small chemicals processes, or they can be designed large enough to remove gases such as sulfur dioxide from large coal fired power boilers.

 

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The Low Energy Scrubber is suitable for low pressure dropapplications, involving heavy inlet dust loadings and slurry recycling. It has high collection efficiencies in the range of 5-10 microns. The system utilizes a tangential gas inlet and stationary scrubbing vanes to induce centrifugal motion of the gas for removal of dust. Mist eliminators or Demisters are often included in wet scrubbing systems to remove liquid droplets before the gas enters the atmosphere. The Centrifugal vane type Demister is provided in our systems to minimize liquid carry over problems.

 

 

 

 

 

 

 

 

 

The Ventriscrub is conventional in every respect. This venturi scrubber features wet approach inlet which eliminates wet/dry line build-up problems. Unit can be furnished with a fixed, butterfly or two door venturi throat section; smooth or flooded elbow and a conventional cyclonic mist separator. Larger separators may be furnished with radial inlet and mesh pad or chevron type demister section.

 


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Dust laden gases enter the unit vertically. Scrubbing liquid is introduced utilizing tangential pipes and a spray header, if required, over the venturi throat section to ensure complete coverage. The venturi throat is set to operate at desired pressure drop for highest collection efficiency. Scrubbed gases then make a 90 degree turn and enter a cyclonic separator where separation of the gases and free liquid droplets takes place. The slurry is discharged through the bottom and dewatered scrubbed gases are exhausted vertically via the top outlet.

 

 

A typical Lime/Limestone Flue Gas Desulfurization (FGD) system consists of three major sub-systems : The reagent (lime or limestone slurry) preparation; the scrubber/SO2 absorber and mist eliminator; and the slurry/solid waste disposal systems. A quencher may be added to cool and pre-condition the inlet gases when high-temperature gases are to be handled.

 

Combining the design features of a spray tower and a turbulent contact absorber, RIECO Multiscrub-V system can easily achieve more than 98% SO2 absorption efficiency at total energy consumption for fan and pumps lower than that of a spray tower system.

 

For a lime FGD system, a lime slaker, processing pebble lime is required in place of the limestone wet ball mill. To facilitate the disposal of the solid waste, or to produce a saleable product in the form of high quality gypsum, a forced oxidation system may be utilized to oxidize the main reaction product, calcium sulfite, to gypsum. A schematic flow diagram of the system is depicted. We can assist by designing the most suitable system for you based on these lines.

 

 

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