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Showing posts from January, 2019

What are Bi-Drum Boilers? How Do They Work?

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Bi-drum boilers are used for purposes of power generation and as process steam generators. This type of boiler is used up to 100MW for generating power. Bi-drum boilers are non-reheat units which are getting wiped out due to high heat rate of the plant. These boilers are used for generating high steam pressure which is used for power generation owing to their ability to accommodate high load of fluctuation and respond to load changes with more agility compared a single drum boiler. The two drums in the bi-drum boiler are connected using a large number of convective heat transfer tubes known as bank tubes or boiler bank tubes. These tubes are about one thousand in number. The bank tubes and the drum at the bottom that contains water will have a water level that will be up to the normal working level of water in the upper drum. The water availability in the bi-drum boiler makes it very adoptable for large load changes. Flue gases enter the bank tubes which are placed towards t...

The Four Steps in Industrial Water Purification

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Industrial water treatment systems meet a number of purification and separation needs. They range from relatively compact and straightforward to complex, multiunit processes that serve a variety of applications. Industrial water treatment systems treat water so it becomes suitable for a given use. Uses include consumption, manufacturing and disposal. Each system is different depending on the facility’s needs and the technologies that are used to make these systems. Some of the most common and in demand industrial water treatment systems include: raw water, boiler feed, and wastewater treatment systems.  Wastewater treatment optimizes water obtained from water-based industrial processes. Industrial water that is treated through a purification process manages problems areas of scaling, corrosion, damaging microbial activity, and disposal of residue water. STEP ONE: SCREENING Water from a source, either a natural or industrial source, is made to pass through a screen when it ...

How Do Electrostatic Precipitators Work?

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Reducing air pollutants is vital for human health and the health of the environment. Poor air quality has harmful effects on human health, particularly the respiratory and cardiovascular systems. Pollutants also damage plants and buildings, and smoke or haze can reduce visibility. Industries are largely responsible for causing pollution. They are also the ones who have access to a number of pollution control devices that absorb, filter, dilute, and disperse pollutants. One such device for pollution control is the electrostatic precipitator. This device works by removing particles and smoke from a gas stream using an electrostatic charge. Dust particles travel past wires that have a high direct current (DC) voltage applied, which ionises the surrounding gas. This corona discharge causes the particles to pick up a small electrostatic charge, without impeding the gas flow. Originally designed for recovery of valuable industrial-process materials, electrostatic precipitators are used a...

Common Challenges in Sewage Treatment Plants and How to Overcome Them

Wastewater treatment methods, while important to people all around the world, come with their share of issues. With the increasing population and the high number of people living in rural communities, smaller towns and companies are installing decentralised sewage treatment plants (STPs)   to solve water treatment problems. These systems make for a viable long-term alternative to centralised sewage treatment facilities. Read on to learn about the five common problems with Sewage Treatment Plants (STPs) and how they can be fixed: 1 . Downstream equipment is failing because of a build of large solids, hairs, and fibres The first step in any wastewater treatment process is screening. Screens are used to remove large non-biodegradable, floating solids that frequently enter wastewater works. These include rags, paper, plastic, tin, containers, and wood. Efficient removal of these materials is important to protect the downstream plant and equipment from any damage, unnecessar...

Are Waste to Energy Plants Environment Friendly?

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A Waste to Energy plant takes solid waste and converts it to electricity or heat through a highly ecological and cost-effective process of energy recovery.  This plant runs by burning waste at high temperatures and using heat from boilers   to make steam. The steam produced drives a turbine which creates electricity. Some proven benefits of using a waste to energy plants are: 1)     Eliminates methane emissions from landfills 2)    Offsets greenhouse gas (GHG) emissions from fossil fuel electrical production 3)    Recovers/recycles valuable resources, such as metals 4)    Produces clean, reliable base-loaded energy, and steam 5)    Uses less land per megawatt compared to other renewable energy sources 6)    Sustainable and steady renewable fuel source 7)    Destroys chemical waste 8)    Results in low emission levels, typic...