explain why lagging is important in steam plant boilers

How Do Steam Boilers Work? | Hunker

Steam boilers provide efficient heat for homes and industrial settings. In most cases, raw water is fed into the boiler from a pipe system. That water is then purified to clean it of any debris. Next, the water is fed into a de-aerator that removes air, then is fed into the boiler tank and heated.

Introduction to Boilers - Waybuilder.Net

The steam injector (fig. 1- 12) is a boiler feed pump that uses the velocity and condensation of a jet of steam from the boiler to lift and force a jet of water into the boiler. This injection of water is many times the weight of the original jet of steam.

PDF Boiler Controls &Boiler Controls & Instrumentation

why three element control ? in high pressure boilers , when the steam demand of the boiler increases suddenly , the withdrawal of steam from the steam drum will be higherfrom the steam drum will be higher than the steam generation as combustion control will take some time to react and increase the fuel heat input to the boiler.this will

Vertical Boiler Project 3/28/11 - Model aircraft

More important than that I want be to be sure that I am following an accepted guideline for building a safe boiler!!! Now it should go without saying that operating any pressure vessel has a certain amount of risk involved. This especially pertains to steam boilers where the pressurized contents is scalding hot!!!

Understanding Steam & Boiler Heating Systems | HomeAdvisor

Boilers and radiators are not often installed in new homes, but many older residences still feature this type of heating system. Furthermore, because this type of heating works well in multi-residence situations and larger buildings, steam heating and hot-water heating are still common in many apartment buildings, multi-family dwellings, and older business buildings.

Safety | Boiler inspection and maintenance | Plant Services

Boilers must be inspected by certified inspectors according to a mandated schedule. The day-to-day maintenance and service of boilers is the responsibility of plant engineers or plant managers. It's important to remember that most problems don't occur suddenly. Instead, they develop slowly over a long period of time.

Thermal Power Plant | Defination, Components & Working

Thermal Power Station process flowchart and diagram. The fuel is transported from mines via trains to the fuel storage facility in a power plant. The fuel transported to the plant is generally bigger in particle size and before it is fed to the boiler furnace it is broken down into smaller pieces using crushers.The fuel is then fed to the boiler generating a large amount of combustion heat.


The boiler is the part of the system that heats the water to be distributed. The key elements of a boiler include the burner, combustion chamber, heat exchanger, exhaust stack, and controls. Boiler accessories including the flue gas economizer are also commonly used as an effective method to recover heat from a boiler. Key Components of Boilers

Boiler Pressure - an overview | ScienceDirect Topics

Boiler pressure is the key factor for determining the need for a condensate polishing system. With a steam generator plant with low steam pressures (below 40 kg/cm 2), the requirement of the CPU is usually avoided.Hard scale formation and boiler metal corrosion can easily be prevented through FW treatment before sending to the boiler proper.

Boiler Operation & Boiler Maintenance | HSB Locomotive

Boiler Logs Are Important. The majority of boiler accidents can be prevented. One of the most effective tools is the proper use of operating and maintenance logs. Boiler logs are the best method to assure a boiler is receiving the required attention and provide a continuous record of the boiler's operation, maintenance and testing.

What is a Superheater? (with pictures) - wiseGEEK

A superheater is a device found in steam boilers that is used to convert wet, saturated steam into dry steam. Superheaters are a very beneficial part of the steam cycle, because dry steam contains more thermal energy and increases the overall efficiency of the cycle. Not only that, dry steam also is less likely to condense within the cylinders of a reciprocating engine or the casing of a steam

Boiler feed water - Lenntech

Proper treatment of boiler feed water is an important part of operating and maintaining a boiler system. As steam is produced, dissolved solids become concentrated and form deposits inside the boiler. This leads to poor heat transfer and reduces the efficiency of the boiler.

Steam Temperature Control | Control Notes

Steam temperature is one of the most challenging control loops in a power plant boiler because it is highly nonlinear and has a long dead time and time lag. Adding to the challenge, steam temperature is affected by boiler load, rate of change of boiler load, air flow rate, the combination of burners in service, and the amount of soot on the

PDF Basic Water Treatment of Steam Boilers

BASIC WATER TREATMENT OF STEAM BOILERS Steve Kenny and Dave Pope Chemco Water Technology Vancouver, WA This is a brief discussion on low-pressure steam boiler chemistry. It provides dry kiln boiler operators the tools to maintain an efficient and effective boiler chemistry program.

Environmental Science-Harrison Nonrenewable Energy

Start studying Environmental Science-Harrison Nonrenewable Energy. Learn vocabulary, terms, and more with flashcards, games, and other study tools. How is the heat generated from burning the coal in the boiler captured? The steam causes a giant set of turbine blades to spin. Why is it important for power plants to be built next to

Boiler Tube Cleaning | Goodway

There are two types of tubular boilers - firetube and watertube. In the watertube boiler, water is carried in the tubes and heated to the point that it becomes high pressure steam.In most areas, watertube boiler plants must have licensed stationary engineers on hand at all times and maintenance is usually performed by in-house personnel.

steam engine | Definition, History, Impact, & Facts

A brief treatment of steam engines follows. For full treatment of steam power and production and of steam engines and turbines, see Energy Conversion: Steam engines. In a steam engine, hot steam, usually supplied by a boiler, expands under pressure, and part of the heat energy is converted into work.The remainder of the heat may be allowed to escape, or, for maximum engine efficiency, the

Boiler Safety Guidelines - Banks Engineering

Boiler Safety - Courtesy of Rentech Boilers. back to Banks Engineering Boiler page. Safety Manual. General. This documentation does not replace the Owners existing company safety operating procedures and instructions. All normal safety precautions should be followed when operating boilers, burners, and fuel systems.

PDF PWTB 420-49-21 Boiler Water Treatment: Lessons Learned

preventable through proper boiler water chemistry maintenance and treatment. To assist installation personnel responsible for operating heating systems, a list of lessons learned over the past 15 years has been assembled to indicate the most common problems and their solutions. The Boiler Water Treatment: Lessons Learned document is attached.

Boiler-Tuning Basics, Part I - POWER Magazine

A typical O 2 set point curve for a coal-fired plant is a function of boiler firing rate or boiler demand. Minimum levels of air are required so that reducing conditions in the furnace never occur.

How to control power factor output of an alternator in

The power plant is named after the prime mover type like- diesel plant has diesel engine, nuclear power plant has nuclear power to drive boiler to run turbine. How to control power factor in a power plant. As the power factor is nothing but the ratio of active and reactive power. We can control it by varying either active or reactive power.

Understand the importance of water/steam chemistry

Many thousands of industrial plants around the world generate high-pressure steam for process applications and power generation. Yet, water/steam monitoring and control often take a back seat to process operations, even though corrosion, scaling and other problems caused by poor water/steam chemistry can cost a plant millions of dollars.

Heat Distribution Systems | Department of Energy

That leaves two heat distribution systems -- steam radiators and hot water radiators. Steam Radiators. Steam heating is one of the oldest heating technologies, but the process of boiling and condensing water is inherently less efficient than more modern systems, plus it typically suffers from significant lag times between the boiler turning on

Why do most industries use boilers? - Quora

Boilers are the Apparatus used to generate the steam. The generated steam can be used in many ways like power generation, for the processes in many industries. I explain with an example. Let us consider a Sugar factory, in sugar factories steam re

Boiler, How it works ? - YouTube

Different parts of boiler such as economizer, super heater, re heater, water wall and steam drum are illustrated here. This video also explains an important concept during boiler heat addition

Thermal power station - Wikipedia

The energy efficiency of a conventional thermal power station is defined as saleable energy produced as a percent of the heating value of the fuel consumed. A simple cycle gas turbine achieves energy conversion efficiencies from 20 to 35%. Typical coal-based power plants operating at steam pressures of 170 bar and 570 °C run at efficiency of 35 to 38 %, with state-of-the-art fossil fuel

Combustion Efficiency and Excess Air - Engineering ToolBox

Carbon dioxide - CO 2 - is a combustion product and the content of CO 2 in a flue gas is an important indication of the combustion efficiency. Optimal content of carbon dioxide - CO 2 - after combustion is approximately 10% for natural gas and approximately 13% for lighter oils.

This Experiment Marcet Boiler Engineering Essay

It was important to remove the air from the boiler to avoid flaws of readings . Marcet boiler is used in plant steam industries, power plant, cooking utensil and so on. Conclusion. in the experiment, it shows from the table and theory that temperature and pressure is relatively proportional in balance with water

How to Destroy a Boiler -- Part 2

How to Destroy a Boiler -- Part 2. Summary: The following article is a part of National Board Classic Series and it was published in the National Board BULLETIN. (4 printed pages) William L. Reeves, P.E President, ESI Inc. of Tennessee. Category: Incidents Summary: The following article is a part of the National Board Technical Series. This article was originally published in the Summer 1999

NON RETURN VALVE LEAKING - Boiler and Pressure Vessel

at my plant we have 2 500hp steam boilers and on one of them the non return valve is leaking which is causing the pressure gauge not to go down once the boiler is switched from lead to lag.i am new to steam and don't know that much yet but am very eager to learn.

5 Important Reasons to Keep Maintenance History

5 Important Reasons to Keep Maintenance History. Recording maintenance history accurately leads to failure prevention and drives awareness about equipment maintenance. CMMS software will narrow down performance issues to parts and elements of your equipment. Here are five major benefits to keeping track of maintenance.

How Are Steam Boilers Used in Hospitals? | Miura America

This is another important use of boilers in hospitals. A portion of the steam produced by boilers gets pumped into an autoclave sterilizer, which is usually located in a lab or surgical area. The hot steam helps to kill any germs and bacteria on medical tools, making sure they are free of any harmful microorganisms.

Boiler And Important Terms (हिन्दी ) - YouTube

On this channel you can get education and knowledge for general issues and topics.

Why return condensate to the boiler? - Plant Services

The benchmark for optimal condensate return is as high as 90%. This is possible if the plant doesn't use direct steam injection for process applications. Below is an illustration of the potential savings of a 44,000 lb/hr, 150 psig steam system with no condensate returned to the boiler plant:


UNIT 2 STEAM POWER PLANT Steam Power Plant Structure 2.1 Introduction Objectives 2.2 Basic Consideration in the Analysis of Power Cycles 2.3 Steam Generator 2.4 Super Heater 2.5 Feed Water Heater 2.6 Furnaces 2.7 Energy Performance Assessment of Boilers 2.8 Steam Turbines 2.9 Condenser 2.10 Cooling Tower

PDF The International Association for the Properties of Water

water, and mechanical carryover of droplets of boiler water into the steam. Once the total carryover is known, then boiler water limits can be set to limit the risk of initiating corrosion in the boiler, as well as steam limits to minimize the risk of initiating corrosion and deposition in the steam circuits, including the turbine.

Thermal power plant - Simple English Wikipedia, the free

A thermal power plant is a power plant where steam is used to drive a steam turbine.This turbine is connected to an electrical generator. After this, the water is condensed, and may be used again.This is known as the Rankine cycle.There are different procedures that can be used to heat the water;


(a) the desired boiler water pH numerical values, and (b) that all other desired values are ALARA. OBJECTIVES On completion of this lesson the trainee will be able to: General 2.1 State and briefly explain two major objectives of chemical control of the Condensate, Feedwater and Boiler System.

Condensing vs. Non-Condensing Boilers: What's the

Condensing Boilers. Condensing boilers have recently been introduced to the market to provide more efficient thermal capabilities. The basic system design is that the boiler is completely sealed as the air used during the combustion process is drawn in through the flue from outside. The created flue gases are not vented out.

Boiler Water Treatment - Why is It Important ? - Bright

Boiler water quality is of prime concern to all boiler operators. The process of water treatment in boilers is not limited to producing high quality DM water. The stringent water chemistry requirements of Supercritical power plants makes water treatment in boilers a very critical aspect of power plant operation. This necessitates the use of a high quality water treatment system.