TILI Automation

 In this post, we will see the use of ultrapure water in the semiconductor industry. Semiconductors are a very important part of our life. Daily use devices from small ones like headphones to mobiles to laptops to controllers used in automobiles; any electronic equipment cannot function without a semiconductor. Ultrapure Water in Semiconductor Industry They are the heart of any electronic device. It is important to know that there are only a handful of manufacturers in the world who deal in its making. It requires a very finest level of accuracy in making a wafer chip; even a nano mistake can make it a waste. Semiconductors require a huge amount of pure water, or you can say even ultrapure water in their manufacturing. For general knowledge, it must be known that a standard 30cm. wafer chip requires 2200 gallons of water (1 gallon is approximately equal to 4 liters). So, you can imagine the amount of water to manufacture chips in bulk daily. And the most important; is not just wate...

 Emerson DCS system is now a globally recognized system in the chemical as well as oil and gas industries. Nowadays Emerson remains a footprint on safety instrument systems in order to increase the plant and process safety. Most Emerson DCS systems of an oil and gas plant is having a combination of two systems one is BPCS which is called “Basic Process Control System” and SIS or ESD which is called “Safety Instrument System” or “Emergency Shut-Down System”. Here we discuss the understanding of differences between the BPCS Control system and the ESD control system and how these two systems are differentiated. Firstly, we understand what is BPCS and SIS? Basic Process Control System (BPCS) A basic Process Control System (BPCS) is a system that handles the control and monitor functions of an industrial plant process. BPCS is responsible for the proper operation of the plant, and in many instances is used as the first layer of protection. A simple example of a basic process control loo...

 Safety Instrumented System (SIS) Logics are built with safety interlocks considering multiple safe scenarios for protecting the equipment/plant. The functionality of such logics implemented either in the Basic Process Control System (BPCS) or Safety System (SIS) is very critical for the plant operations. However, there may be a need to bypass an SIS or BPCS Independent Protection Layer (IPL) function for specific reasons such as startup, testing, or maintenance. Again bypasses shall be counterchecked and removed for bringing back the equipment to operate in a safe manner. To manage this, there shall be a management system to ensure that a bypass is removed once the condition that required it has been satisfied.  Bypass Rules Written procedures shall exist for any hardware or software that permits bypass of an SIS function.  For SIS, BPCS IPL safety functions, procedures to be made available to update, edit & Bypass (as and when required), and required System Access r...

 In this topic, we will discuss the purpose of 100% and 30% valves. Why are both these valves required in power plants? Before starting with the discussion will see some basic aspects What is a Control Valve? A control valve is installed in a pipeline to regulate the flow rate of the fluid (Liquid, Gas, or Steam) as a response to the controller output (manipulated variable). The controller can adjust the valve opening or closing at any stage between 0% to 100%. The control valve in a pipeline does the following tasks. Stopping and starting of flow Reduce and raise the flow rate Controls the flow direction What is Non-Return Valve (NRV)? This is a one-way valve that allows the fluid to flow in one direction only. As its name implies, non-return means there is only one-directional flow. This device ensures there is no backflow of fluid in the pipeline. These valves are generally used in pump discharges and steam water pipelines. The direction symbol provided on the valve shows the di...