Renewable Energy
Bioenergy plant design – material decisions for tanks
As energy prices continue to rise, the number of bioenergy plants across the world is increasing rapidly. However, design engineers are faced with a number of basic choices when it comes to starting a new project.
Como consecuencia de que los precios de la energía continúan aumentando, el número de plantas de bioenergía asciende rápidamente en todo el mundo. Sin embargo, los ingenieros encargados del diseño se enfrentan a una diversidad de elecciones en lo que respecta a la iniciación de un nuevo proyecto.
Durch den zunehmenden Anstieg der Energiepreise erhöht sich weltweit die Anzahl der Bioenergieanlagen rasant. Die Konstrukteure haben jedoch zu Beginn neuer Projekte eine Vielzahl grundsätzlicher Entscheidungen zu treffen.
O
ne major decision for engineers is what construction material to use in the tank design of the digester, gas storage
and feedstock storage. Tree materials dominate the market:
concrete, carbon steel and stainless steel – with the steel variants having a variety of coatings and construction techniques to choose from as well. Te final choice must made from an informed standpoint to ensure the most appropriate design is used. Anaerobic digestion (AD) plants can be designed to operate in a number of ways, depending on the plant’s scale, the feedstock to be used and the aims of the project in terms of energy output. Tese must be assessed and determined before considering the best tank design and construction method. Te essential aspects of each choice are detailed here.
As a building material, concrete has two major advantages; it is strong and relatively cheap – and as such it has been used for the construction of bulk storage tanks for some time. However, the process of AD requires
much greater resistance to chemical attack than that provided by concrete. In addition, the standard surface finish of a concrete tank inhibits the agitation process used within AD.
Another consideration at the design phase is the overall build time, which affects the total project cost and the time before the plant can generate income. Te construction of a concrete storage facility be completed using prefabricated panels lifted into position by mobile crane, or by pumping liquid concrete into a ring of preformed sections. Tese methods can take a long time to complete and they use a number of heavy plant vehicles.
Fig. 1. Biogas Plant being built using Lipp SST tank. 38
www.engineerlive.com
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52