Green Planet Technologies

Latest techniques of air pollution control are:

• Combustion – This method is applied when the pollutants are organic gases or vapours. The organic air pollutants are exposed to ‘flame or catalytic combustion’ when they are converted to less harmful product carbon dioxide and product water.
• Absorption – In this technique, the polluted air containing gaseous pollutants is passed through a scrubber carrying a suitable liquid absorbent, which absorbs the harmful gaseous pollutants present in the air.
• Adsorption – In this technique, the polluted air is passed through porous solid adsorbents kept in suitable containers. The gaseous pollutants are adsorbed at the surface of the porous solid, and clean air passes through.
• Means of controlling particulate emissions -The air pollution caused by particulate matter such as dust, soot, ash, etc. can be controlled by using fabric filters, wet scrubbers, electrostatic precipitators, and certain mechanical devices, that work on the basis of the following:
  • Fabric Filters – The particulate matter is passed through a porous medium made of woven or filled fabrics. The particulate present in the polluted air is filtered and gets collected in the fabric filters, while the gases are discharged. The process of controlling air pollution by using fabric filters is called &'bag filtration’
  • Wet Scrubbers – They are used to trap SO2, NH3 and metal fumes by passing the fumes through the water.
  • Electrostatic Precipitators – When the polluted air containing particulate pollutants is passed through an electrostatic precipitator, it induces an electric charge on the particles, and then the aerosol particles get precipitated on the electrodes.

GPT's core focus is on resource recovery which is advantageous to process focused industries and provides several customized products for controlling air pollution:

• Ash control after combustion in Boiler: The ash being generated after combustion of Fossil fuel or any biomass like rice husk, wood chips, Bagasse, Spent Wash, Palm Fiber, Empty fruit bunch (EFB), Coal, Anthracite, Lignite, inside a Boiler is called as Suspended Particulate Matter (SPM). This ash creates various size of particulates that are emitted from the Stack or Chimney after the Boiler. To control this SPM (ash) of variety suitable Air Pollution control device are selected like Electrostatic Precipitator (ESP), Pulse Jet bag Filter (PJBF), Scrubber, High Efficiency Cyclone, Electrostatic Fabric Filter(ESFF). Major industry that needs to focus like Power, Textile, Food, Brewery, Agro, Palm, Edible Oil, Cement, Steel, Sponge Iron.
• Fume Extraction and De-dusting Systems – These systems are installed to seize fumes from all kind of electric arc (EAF), induction, ladle, submerged arc furnace. Major industries are Secondary steelmaking from Sponge Iron, Scrap, Alloy steel, Steel Rolling, Continuous Casting Machine, Ferroalloy like Ferro-manganese, Ferro Silicate, Ferro Chrome, Cast House, Stock House, Gas Cleaning plant etc.
• Flue Gas Desulphurisation [FGD] – Oxides of Sulphur (SOx) adversely affects the environment. Desulphurisation helps in reducing the harmful effects of SOx through dry, semi-dry and wet systems. 
• Sinter Plant and Pellet Plant De-Dusting – Sintering is the process that is conducted to fuse the constituent materials of iron ore to make a single porous mass that can be used in a blast furnace. Pelletizing is used to turn fine iron-ore grains into pellets that can be used in blast furnaces and are suitable for direct reduction
• Coal Preparation Plants – These plants consist of equipment for storing and handling raw coal. They also have a section for pulverizing, grinding, drying and collection of coal through a bag filter.

GPT Pulse jet Bag Filter system is highly efficient is extracting fine dust from Chipper plants & Crushing/Screening in Paper & Pulp industries. Proper designing of the Dust Extractor, proper selection of filtration area, proper selection of Static pressure of ID Fan and low power consumption is the USP of GPT's Dust Extraction system. Air capacity ranges from 10000 M3/Hr. to 500000 M3/Hr.