Process - Specialized Process Packages

In partnership with specialist international companies and based on own capabilities, BTS offers high performance equipment & packages to the process industry including:

Ion Exchange Membrane (IEM) Technology for Chlor-Alkali Plants in collaboration with Chlorine Engineers Corp., Ltd., Japan

IEM technology for Chlor-Alkali plants is highly advanced and an outstanding technology in all aspects compared to the Mercury Cell or Diaphragm Cell technologies in terms of energy efficiency, running cost, product quality, operation/maintenance, and environment protection. The IEM technology also has advantage over Mercury cells in respect of absence of mercury pollution.

Worldwide trend during the last decade has been the development of electrolyzer for high current density operations in order to save on capital investment, coupled with innovations in power consumption reduction.

CEC was pioneer in developing and commercializing high current density operation Bipolar Membrane electrolyzers with low expected power consumption. CEC offers both types of Ion exchange membrane electrolyzers - Monopolar and Bipolar, as per clients’ requirements. In 2005, CEC has introduced n-BiTAC bipolar electrolyzer, which has the lowest power consumption and operates at high current densities of even up to 8kA/m².

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FUNDABAC® Filters and CONTIBAC® Thickeners in collaboration with Dr M, Dr Muller, AG of Switzerland

FUNDABAC® Filters

Invented and developed by Dr. Hans Müller, as an alternative to the then existing filters and the new equipment for coping with more and more sophisticated filtration processes, the FUNDABAC® filters and CONTIBAC® thickeners captivated users because of its great simplicity in functioning. Its advantages in varied applications and its performance are now widely recognized to be a basic tool for the chemical processing industry. A large range of suitable filter cloths guarantees the quality of the filtrate.

FUNDABAC® Filters

The unique filter elements are the heart of the FUNDABAC® filter systems. The clover leaf cross-section of the element permits safe filtration while guaranteeing adherence of the filter cake to the cloth. The same characteristic is the basis for the effectiveness of the cake discharge.

Whether programmed for dry or slurry discharge, counter-current and pressure in the interior of the candle bring about cake discharge. The unique structure accentuates the effects of this counter-current; it results in an extreme outward bellowing of the filter cloths, particularly at the zone where the cake adheres, causing vertical cracks in the cake. The quick-pulse gas blow-back (such as air or nitrogen) into the filter hose instantly releases the cracked cake, causing it to fall.

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CONTIBAC® Thickeners

The CONTIBAC® is a slightly modified FUNDABAC® filter used as a continuous thickener, producing concentrated slurries. Unlike traditional thickener equipment, it produces a completely clear filtrate at a high flowrate.

For difficult to filter product streams, short filtration cycles build up very thin cakes, which keep the rate of filtration always at the high initial flux rate. The downtime lasts only few minutes as the next filtration cycle starts almost immidiately

Applications of FUNDABAC® Filters and CONTIBAC® Thickeners

Sulfuric Acid Re-Concentration Plants in collaboration with QVF Process Syatems Ltd

Many processes within the chemical industry generate a waste dilute sulfuric acid. Disposal of such waste streams is becoming increasingly difficult and expensive. If the waste acid is relatively uncontaminated, it can be concentrated and recycled to the process. Also, contaminated acid can often be recovered by using a suitable pretreatment before concentration. This produces savings in raw materials costs and effluent disposal costs.

QVF’s sulfuric acid concentration process is designed to give maximum recovery at minimum cost, by evaporating water from the sulfuric acid under vacuum. The process uses single or multi-stage horizontal evaporators. The evaporators are fitted with tantalum heating tubes, which are fed by steam. Carefully designed baffles within the evaporators minimize back-mixing of the acid for maximum efficiency.

Materials of construction are carefully chosen to ensure maximum life on this aggressive duty: all acid-wetted parts are made from glass, glass-lined steel, PTFE and tantalum.

The production of effluent is minimized by scrubbing the acidic vapors produced, before they are condensed and discharged.

The sulfuric acid concentration process can be used in conjunction with nitric acid concentration and denitration processes to produce a fully integrated system with minimum energy consumption and minimum effluent.

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Demercurization – C Gas Treatment - In - house developed Technology

In order to reduce mercury emissions in cell house ambient air in mercury cell caustic chlorine plant, a demercurization unit is installed to reduce the mercury levels in the air to the permissible levels. BTS has the capability to offer C Gas Demercurization units to its Clients.

In the process, mercury-emitting parts of the cell are kept under slight vacuum so that vapours generated inside do not escape to the atmosphere, thus leading to abatement in mercury emissions.

The evacuated gas is washed first with a NaCl + NaClO solution in the washing tower during which a sizable amount of mercury in the gas is removed. Then, the NaClO in the gas is washed away with fresh water, or a dilute-Na₂SO₃ solution as required, in the water-washing tower.

After dehydrating the C-Gas and heating it upto the required temperature. Its final treatment is carried out in an Activated Carbon tower for achieving the regulatory emission norms

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