Welding without protection

Why do welders feel pain and irritation in the eyes at the end of the day.

Welding requires a lot of energy to melt or fuse the metals. Release of heat and energy can cause chemical and physical reactions. Welding produces ultraviolet, visible and infrared radiation at harmful levels.
These radiations and their secondary effects are responsible for the visual hazards. In general welding radiations of shorter wavelengths cause cornea problems whereas welding radiations of longer wavelengths cause biconvex.

 Another chance of getting ‘arc-eye’ is my the smoke from the flash  which is more harmful to the human eye it effects the eye layer causes red eye. Even the people who is with the welder to help him by holding or guiding gets this problem because smoke can spread in the air.

 Welders will suffer a condition known as ‘arc-eye,’ a sensation of sand in the eyes and can occur even if exposure is limited to a few seconds of looking directly at a welding arc without eye protection.
This condition causes the cornea to swell and also can produce pain, sensitivity to light, and tearing. Repeated exposure can cause permanent eye damage. Cataracts also have been linked to long-term UV exposure.

How to cure?

First wash your eyes with cold water.

Use dilating drops.

 

 

My mini project (Bio Gas Plant)

This focus on a clean, renewable energy source, biogas with low maintenance. It talks about how biogas is possible and practical source of energy, by using proper methods to produce the gas effectively with a mixing chamber.

INTRODUCTION TO BIO-GAS

• Biogas is created naturally by the decomposition of organic matter, organic matter is produced wherever there is human habitation.
• The main forms of organic waste are household food waste, agricultural waste, human and animal waste.

 WHAT IS BIO-GAS?

• Biogas typically refers to a gas produced by the biological breakdown of organic matter in the absence of oxygen.
• Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as biomass, manure, sewage, municipal waste, green waste, plant material, and crops in biogas plan.
• Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S).
• Biogas can be compressed, much like natural gas, and used to power motor vehicles.

Here we are using cow dung as organic waste.
        The average population bovine in India is 260 millions. As a adult bovine produces an average of 10kg of dung per day. Nearly 2 millions tones of dung would be available everyday.