1 Jan Abstract. Energy management programs are vital to the economic life of any industry and heat recovery boilers play a dominant role in those. Waste heat boiler deskbook. Front Cover. V. Ganapathy. Fairmont Press, Jan 1, – Technology & Engineering – pages. Covers the design and application of waste heat boilers for industrial, cogeneration and municipal solid waste applications. Real-life case studies aid the.
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Grimson’s Values of B and N 1. SCR or CO catalyst 9.
Emission-Data Conversions Monitoring combustion emission products-NO x and CO in particular-is increasingly important, due to tightening regulations. Though they are more expensive, they find applications in systems requiring higher power to heat ratios, hot water or boilre pressure steam.
Waste Heat Boiler Deskbook – V. Ganapathy – Google Books
The Waste Heat Boilers 87 boiler consists of a radiant section followed by convection sections including superheaters as required. Since the gas stream has particulates, bare tubes are preferred for the heat transfer surfaces unless the particulate concentration is very low. Insulated downcomersare located at the turning section. They could be of single or of multi-gas pass design.
On site incineration may be used for such streams. Waste Heat Boilers 71 Figure b. There are two fan selections-one withpph capacity and another withpph.
There are however a few concerns with incineration. Using a computer program, several alternatives were studied and are presented in Table below. The superheater runs dry. That is to check if there is fouling or accumulation of deposits on the outside or inside boiler tubes which can reduce the duty transferred.
RDF systems may be used when rapid response to load and higher boiler efficiency is desired. G Re 2, 8, 20, 1.
Another advantage of this design is that the effect of fouling does not have a great impact on the steam temperature. Carbon steel tubes with extended surfaces have been used successfully in several plants in the USA.
Pi using Equation Partial pressure of C02, H20,Basically HRSGs can be classified into two broad categories: Published by The Fairmont Press, Inc. Large boiler with superheater, evaporator and economizer for fluidised bed cat cracker application. This system offers more advantages compared to a combined cycle system.
Incineration of organic liquids, fumes and VOCs volatile organic compounds generally result in clean flue gases containing C02, H20, N2, and 02j hence water tube boilers for boler application could have dezkbook surfaces and the steam parameters can be based on system requirements and not limited by high temperature corrosion considerations. The first few rows are bare, followed by tubes with increasing fin density.
Figure shows the Nelsons chart which is used as a guide to material selection. The product of surface area and overall heat reskbook coefficient determines the duty and not the surface area alone.
Several methods hoiler been used in the past to handle the waste disposal problem: However the loss could be computed more accurately as follows. They have a certain percentage of leakage area, which causes there to be a flow of gas across the area. The effect of tube side xx coefficient and tube and gas side fouling factors on tube wall and fin tip temperatures are illustrated with examples.
The casing design described above is used for the duct work leading to the HRSG from the burner and also in the HRSG portions having a high gas temperature. Fire tube boiler with superheater and economizer.
Flue gas analysis, molecular weight. The kiln is a refractory lined cylindrical chamber about 4 to 15 feet in diameter and 40 to feet long. F Factor from Fishenden and Saunders. Surface area for boilet smaller tube is sq it versus for the larger tube.
Once the tube count and length are determined, the shell diameter wqste be found for elevated drum boilers.
Waste heat boiler deskbook
The rotary motion of the kiln creates a tumbling action thereby mixing the waste stream with the co-currently flowing hot combustion gases. Stearn pressure as before is psig and feed water temperature is oP. Appendix B cites the causes of low temperature corrosion and suggests methods of minimizing the problems.
HRSGs for gas turbines could be of natural or forced circulation type, Figure and Assume that the damper area is 10 sq ft. Jason Makansi, “Combined cycle power plants,” Power, June If the exit gas temperature is higher than predicted, the reason could be fouling on the gas or stearn side. Corrugated paper loose Prom TableK2 is 0. The gas properties must be evaluated.
We will see the effect of tube pitch and configuration on heat transfer later. This design occupies a small floor space.
What is the effect of gas pressure on heat transfer?