what is fouling in boiler

The Dirty Truth About Heat Exchanger Fouling — HeatCalc

Apr 14, 2016· Heat exchanger fouling occurs on many applications ranging from cement kilns to smelter exhaust, to boilers. For this article, I will focus on two types of fuels in power generation applications. 1. Gaseous Fuels. Natural Gas, Propane, and Biogas are all low carbon content fuels that have a low propensity for fouling.

FOULING – Thermopedia

FOULING. The fact that the surface of the foulant layer is rough compared to the original metal surface will, in genera], increase the heat transfer due to the increased turbulence generated by the roughness elements. To some extent, this offsets the effects of increased thermal resistance across the

What is the difference between slagging and fouling in a

Aug 30, 2018· Fouling is the accumulation of unwanted material on solid surfaces to the detriment of function. The fouling materials can consist of either living organisms or a non-living substance (inorganic or organic).

Heat exchanger – Wikipedia

A heat exchanger is a device used to transfer heat between two or more fluids. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact.

Factors Influencing Boiler Slagging and Fouling

Ash Elements. The alkali metals, sodium and potassium, have long been associated with the fouling tendencies of coal ash. Volatile forms of these elements are vaporized in the furnace at combustion temperature and react with sulfur in the flue gas and other elements in the ash form compounds that deposit on convection surfaces.

ASSESSMENT OF ASH FOULING AND SLAGGING IN COAL

A mathematical model of the steam boiler will be presented (Fig. 1) which takes into consideration ash deposits on the furnace walls and superheater surfaces. ASSESSMENT OF ASH FOULING AND SLAGGING IN COAL FIRED UTILITY BOILERS Jan Taler1, Marcin Trojan 2 and Dawid Taler 3 1, 2 Department of Power Plant Machinery, Institute of Process and Power

A Review on Boiler Deposition/Foulage Prevention and

been made to investigate the current fouling problem in boilers and current prevention and removal techniques associated with power plant and discuss the effectiveness of these technique and possible technologies that can be applied to prevent foulage problems in boiler in a safe manner. 2 . Slag. ging and Fouling in Boilers. D

Plate Exchanger: Fouling vs Scaling – Technical Articles

Both fouling and scaling essentially provide an additional (and often times significant) resistance to heat transfer in your heat exchanger. In plate heat exchangers, the degradation of performance is usually magnified because plate exchanger depend on a thin plate wall to maintain their high efficiencies.

Designing A Boiler Chimney heat recovery System Against

Designing A Boiler Chimney heat recovery System Against Fouling. DESIGN CONSIDERATIONS In the designing of the exchanger following factors were put to consideration. 1. The exchanger surface has to be the most efficient and suitable for gas-gas heat exchange. 2. The design has to consider the fouling effect of the flue gases. 3.

Fouling Factors in Heat Exchangers

Aug 17, 2016· Common Types of Fouling. Chemical fouling: when chemical changes within the fluid cause a fouling layer to be deposited onto the tube surface. A common example of this phenomenon is scaling in a kettle or boiler caused by “hardness” salts depositing onto the heating elements as the solubility of the salts reduce with increasing temperature.

Heat Transfer Surface Fouling in Boilers

Fouling in Boiler Heat Transfer Surface. Fouling in boilers is dependent on the type of boiler design and the fuel being fired. Fouling in a chemical recovery boiler, a coal fired boiler, and a biomass fired boiler are different in many ways. In a chemical recovery boiler, fuel being used has a large quantity of alkaline inorganic material.: Dr V T Sathyanathanwhat is fouling in boiler – Industrial Boiler Supplier – Wikipedia, the free encyclopedia Fouling is the accumulation of unwanted material on solid surfaces to the detriment of function. The fouling materials can consist of either living organisms or a non Deaeration of Boiler Feedwater – CNG refueling Information Deaeration of Boiler Feedwater.

Fouling Factors in Heat Exchangers

Aug 17, 2016· Fouling mechanisms vary with the application but can be broadly classified into four common and readily identifiable types. Common Types of Fouling. Chemical fouling: when chemical changes within the fluid cause a fouling layer to be deposited onto the tube surface. A common example of this phenomenon is scaling in a kettle or boiler caused by

Fouling control in biomass boilers | Request PDF

One of the important challenges for biomass combustion in industrial applications is the fouling tendency and how it affects to the boiler performance.

What is Fouling? – Definition from Corrosionpedia

Fouling is the settlement, and sometimes the growth, of undesired materials on solid surfaces in a way that reduces the efficiency of the affected part. Fouling may be caused by either the operating environment or by one of the equipment’s processes. It deteriorates protective coatings on

Biomass Boilers – Guide to Biomass for FBC, Fixed Bed, CHP

Ash is the incombustible solid mineral matter in a fuel. The percentage of ash produced by the combustion of the fuel. is an indication of waste and loss in efficiency and also causes. slagging and fouling on boiler surfaces.

Chapter 12 Boiler Deposits: Occurence And Control | SUEZ

The need to provide boilers with high-quality feedwater is a natural result of the advances made in boiler performance. The ratio of heating surface to evaporation has decreased. Consequently, heat transfer rates through radiant water wall tubes have increased-occasionally in excess of 200,000 Btu/ft²/hr.

Designing A Boiler Chimney heat recovery System Against

Jan 13, 2019· Designing A Boiler Chimney heat recovery System Against Fouling. DESIGN CONSIDERATIONS In the designing of the exchanger following factors were put to consideration. 1. The exchanger surface has to be the most efficient and suitable for gas-gas heat exchange. 2. The design has to consider the fouling effect of the flue gases. 3.

Boiler Fouling, On-line Cleaning Solution Using Impulse

Burning of solid hydrocarbon fuels results in what is commonly referred to as slagging and fouling of downstream heat transfer surfaces due to the bi-products of the combustion process. As heat transfer surfaces are layered with or blocked by ash deposits, efficiency of heat transfer drops dramatically.

Fouling control in biomass boilers | Request PDF

Due to ash fouling monitoring of heat transfer surfaces of the boiler based on dynamic mass and energy balance method, on-line calculation of boiler thermal efficiency and soft measurements for

Boiler Fouling, On-line Cleaning Solution Using Impulse

Boiler Fouling, On-line Cleaning Solution Using Impulse Cleaning Coal-Gen 2011 cleaning sequence and range of the cleaning impulse wave. Impulse waves from each cleaner are created individually, in that each combustion boiler cleaning outage was performed annually so that the utility could