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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It is processed by different means to heaat a high quality shredded fuel and other resalable or recyclable products. Determine the log-mean temperature!: It should be noted that the tube wall temperature will be higher if scale forms outside the tubes.
If we add to this a multipressure HRSG situation or the presence of a radiant section with different operating parameters and fuel firing, the design procedure would be indeed difficult without a computer.
Note that the addition of water or steam affects the exhaust gas desknook and hence the duty of the HRSG. Coal based combined cycle systems [Power] Typicallandlill-gas-to-energy project consists of well-fu.
The casing is internally insulated with 4 to 5 inches of mineral fiber or deskbooo and is protected from the hot gas stream by a stainless wadte or corten or carbon steel liner, which is designed to move or expand in the plane of the casing.
Minimal field installation is required on these units. Hence selection of fin configuration along the wastd flow path has to be made with great care. It is also claimed that the excess ammonia or slip reacts directly with the precious metal catalyst to form nitrogen, water and nitrous oxide, which is not a pollutant; however it is a greenhouse gas. Let us derive an expression for the leakage of gas across a damper, stating the assumptions made.
Waste Heat Boiler Deskbook 50 3. In some plants the steam drum is made common to the flue gas and reformed gas boilers through a system of downcomers and risers.
The superheater is designed so that it can run dry if required. In these boilers, high temperature gases with a typical analysis as in Table wasste the boiler, usually a fire tube type at very high temperature, in the range of to o P. A few examples on the subject of evaluating operating and life cycle costs are discussed in the book.
Once the gas data are fed in, the next question asked is “Exhaust gas flow and temperature. Wide spacing may be provided at the front end of the boiler, where there is more chance for slagging or fouling, deskbooo by sections with smaller spacing at the cooler end. The gas properties must be evaluated.
Assume that the fouling factors and gas analysis are same as before. The oxygen depletion is obtained by proportion.
Waste heat boiler deskbook
Figure shows a typical system deskblok collecting and burning LPG gas in an engine. Since the gas stream has particulates, bare tubes are preferred for the heat transfer surfaces unless the particulate concentration is very low.
With distillate fuels, the fin density should be lower say 4. The circulation ratio is arrived at by balancing the system resistance to flow and the available thermal head. When less steam is required for process in Cheng cycle system, the excess steam can be 49 Waste Heat Boilers superheated and injected into the gas turbine, thus increasing the electrical power.
Aluminium which is Waste Heat Boilers 73 Table One has to be concerned with heat flux inside the tubes particularly with fired units. Tube sizes vary from 1. In order to design a HRSG for any application, the characteristics of the gas stream are important. The boiler arrangement is similar to mass burn MSW systems. In addition, a mixed flow arrangement was used for the superheater with the steam exit at the cooler gas end so as to minimize the tube wall temperature.
Waste Heat Boiler Deskbook – V. Ganapathy – Google Books
Temperature of the gas stream and the surface temperature of the bundle. There will be damage to refractory at high temperatures if the liquid contains alkali salts. Sometimes fresh air is used instead of turbine exhaust gas. Wawte Khan, “Co-incineration of waste water sludge,” Resource recovery, vol 3,p 51