Specialist in solving environmental problems

Transcription

1 Specialist in solving environmental problems P.zza Maggiolini 40, Parabiago (MI) - ITALY Tel Fax pramec@pramec-srl.com

2 INTRODUCTION PRAMEC is a young company formed by people who have worked for years in the field of industrial air and water treatment and have added different skills in order to give a complete answer to the problems of pollution. Our philosophy is based on quality, service and punctuality with teamwork. The quality of our products is the result of the participation of everyone in the company contributes to its success. the whole team and Thanks to our in-depth experience and know-how, we are able to guarantee the most upto-date technologies in the field of environmental treatments. This special quality has allowed us to refine our systems, used both for abatement of pollutants and for odour control, ensuring excellent system efficiency. In the field of water purification, we have various systems active in different industries, ranging from galvanising industries to laundries to carwashes. Our strength is our ability of bring together the precision of a large industry with the flexibility of a small company. 2

3 AIR POLLUTION CONTROL Our technologies and products can be efficiently used to reduce the emission of volatile organic compounds (VOCs) to the atmosphere. The term volatile refers to the tendency of a compound to evaporate and by definition volatile organic compounds are organic. While there are more than 100 natural and man-made chemical elements in total, organic compound consist only of the element Carbon (C), Hydrogen (H), Nitrogen (N), Oxygen (O), Sulfur (S) and Chlorine (Cl). VOCs are emitted from a myriad of industrial process like chemicals, petrochemicals, coatings, textiles, rubber, pulp and paper, metal, pharmaceuticals, food and minerals. THERMAL OXIDATION SYSTEM Thermal oxidation is a combustion process. Combustion is defined as the burning of gases, liquids or solids, in which the substance is oxidized evolving heat and often lights. Thermal oxidizers are distinguished from incinerators by virtue of the fact that they generally only treat vapours or relatively pure liquids. Thus, the combustion products usually do not contain particulates, dioxins or heavy metals. Thermal oxidizers are favoured in most circumstances because of their reliability, the fact that no further treatment is required and because of their ability to achieve high VOC destruction efficiencies. Examples of applications Thermal oxidation systems without thermal recovering is used for high concentration of pollution, till 50% of LEL. These typology of oxidizers are used in chemical, chemicalpharmaceutical and oil and gas industry. 3

4 Thermal oxidation systems with thermal recovering and heat exchanger are used with medium-high concentration of VOC till 25% of LEL. This systems have a butterfly valve at the end of the combustion chamber in order to calibrate the system and reduce the thermal recovery. Regenerative thermal oxidizer (RTO) are oxidizer where a regenerative heat exchanger recover till 97% of the heat necessary to reach the combustion temperature. These heat exchanger could be filled with random or structured ceramic packing media. These systems (RTO) can work also with low VOC concentration (< 1 g/nm 3 of VOC) 4

5 In order to treat halogenated VOC or complex air stream (powder and VOC) is possible to link different technologies before and/or after the oxidizer to purify the airstream from pollutant. 5

6 WET PROCESS FOR AIR PURIFICATION Horizontal or vertical scrubbers for abatement of polluting substances or for odour control with one or more independent washing stages. Made of polypropylene (PP), PVC, HDPE or stainless steel, for anti-corrosive capabilities, this type of scrubber is widely used for organic odour control and the removal of acidic or alkaline gases through various washes. The systems may be equipped with ph, redox potential or electrical conductivity measuring instruments, with automatic systems for reintegrating the reagents and discharging used washing solutions. Examples of applications Systems for neutralising acid downstream from waste incinerators, made of polypropylene, reinforced with glass-reinforced resin and equipped with automatic ph control and partial discharge of the used washing solution. 6

7 Odour control systems installed in industry for cleaning organic and inorganic substances. Systems for removing oil mists originating from processing synthetic fibres or from cataphoresis painting, equipped with counter-current droplet separator washing system. Air treatment systems for removing gaseous pollutants, fumes, oil mists, powders, also used for treating venting from tanks containing products such as acids, alkalis or solvents. 7

8 8

9 DRY PROCESS FOR AIR PURIFICATION Bag filters, activated carbon biofiltration are some of the possible solution for the removal of powder, VOC or odour from a gas stream. Examples of applications Biofiltration for neutralising odours from waste treatment Activated carbon units after wet deodorizing system on a wastewater treatment plant 9

10 WATER TREATMENT BIOLOGICAL SYSTEMS Aerobic biological purification is effective and economical in treating wastewater contaminated by surface-active agents, alcohols and other water-soluble solvents such as phenols and biodegradable substances in general with BOD and COD values higher than legal limits. Small-sized rotating biological contactors (RBCs) are used in chemical and pharmaceutical industries, in laundries, tanneries, painting and other similar activities. The purchase and running costs are very cheap. 10

11 CHEMICAL/PHYSICAL SYSTEMS These plants generally include one neutralisation treatment and one flocculation treatment followed by liquid/solid separation through decantation or flotation. In some cases the pollutants to remove are chemically oxidised using catalysers to accelerate the processes. Continuous or discontinuous (load or batch), manual, semi-automatic or completely automatic systems can be supplied, with PLC programming if required. They are normally used in the following industrial activities: galvanic treatments, printing onto paper or cardboard, colouring of plastic objects, phosphatisation or anodising of metals, chemical and pharmaceutical processing, tanning etc ION EXCHANGE RESIN SYSTEMS The continuous elimination of low concentrations of contaminants, in particular metals, allows water to be used in a closed circuit, drastically reducing consumptions. Typical industrial applications is the washing of pieces subjected to galvanic treatments, anodising or phosphatisation. This process takes place using resins whose type depends on the contaminants to remove (anions, cations) while the volumes to treat determine the dimension of the washing columns. The regeneration of used resins takes place by means of automatic controls. The effluents produced during the regeneration of the resins (eluates) may in turn be treated using chemical/physical systems supplied by PRAMEC and designed according to requirements. 11

12 12

13 Centrifugal FANS A complete series of plastic fans covers the widest range of requirements with a dual operating alternative: direct coupling or drive coupling with belts and pulleys. A series of high-performance (up to 80%) fans ensures excellent, economical operation with low noise levels. The most important characteristic is resistance to corrosion, obtained by choosing thermoplastic materials which offer the best guarantees for the majority of chemical compounds. From the many thermoplastic materials to use to make this type of fan, we have chosen polypropylene (PP), but for particular requests or requirements, the same fans can be made using PVC. 13