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steam boiler for wood biomass 25t/h,5,5MPa, 475°C
Pecháček, Michal ; Kohout, Přemysl (referee) ; Skála, Zdeněk (advisor)
The work deals with design of steam grate boiler with a output of 25 t/h, parameters of steam output p = 5.5 MPa, t = 475 °C and a temperature of feed water 105 °C. It is a boiler with natural water circulation by evaporation surfaces. Wood biomass is boiler fuel. The proposal consists of stoichiometric calculations, determination of boiler efficiency, thermal calculations and determinion geometric parameters of the boiler and its heat transfer surfaces. The boiler drawing is a part of the work.
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The Effective and Ecological Burning of Biomass
Špiláček, Michal ; Kolat, Pavel (referee) ; Masaryk, Michal (referee) ; Skála, Zdeněk (advisor)
This work deals with the creation of a numerical model of a biomass combusting chamber on a grate. The research part of this work describes the basic properties of biomass important for its combustion and the biomass combustion process itself. For this process which it is necessary to know the dynamics of the chemical reactions and the overall mechanism of a grate combustion of fuels. It also describes the production of harmful emissions that can be generated by combustion of biomass and the emphasis is mainly on the production of nitrogen oxides. In the next part is described the combustion device itself and the basic mathematical model which incorporates the mechanisms of heat transfer, flow of fluids and transport of chemical species. The basic mathematical model is then extended to a complete mathematical model by determining the initial and boundary conditions. Subsequently, the results of the computer simulation of the mathematical model are presented and commented. The main focus are the emissions of nitrogen oxides and hydrocarbons. These results are used to design an improvement of the geometry of the combustion chamber.
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Heat and electricity production in waste -to -energy plant
Szegedi, Peter ; Lisý, Martin (referee) ; Skála, Zdeněk (advisor)
This diploma thesis deals with a design of steam boiler used to incineration of mixed municipal waste. Based on the specified fuel and the required output parameters of the steam from a steam boiler is calculated stoichiometry of incineration, thermal losses and overall boiler efficiency. Other chapters of thesis are focused on construction and thermal calculation of boiler moves. Finally, this thesis is to check heat balance of the boiler.
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Grate Boiler for Wood Chips Combustion
Kozák, Tomáš ; Kohout, Přemysl (referee) ; Lisý, Martin (advisor)
The thesis is dedicated to the design of the steam boiler which burns wood chips, with a natural circulation of the water. It is a grate boiler, which produces 20 t/h of the steam. The output parameters of the steam are 420 °C and 5 MPa. The feedwater temperature is 125 ° C .The thesis gradually deals with stoichiometric calculations and determines the efficiency of the boiler. Then it describes the design of the fireplace and thermal calculations of each heat transfer surfaces. The appendix includes drawings of the boiler.
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Grate Boiler for Wood Chips - 96,4 t/h
Strnad, Ondřej ; Ryšavý, Milan (referee) ; Lisý, Martin (advisor)
This thesis deals with issue of grate boilers. It describes their properties, function principles and usage. The main part of this thesis is design of grate boiler burning biomass with steam output 96.4 tons/hour. Steam temperature and pressure at the output are 490 °C and 8.1 MPa.
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Grate Boiler for Wood Chips and Coal Combustion
Lauš, Ladislav ; Kohout, Přemysl (referee) ; Lisý, Martin (advisor)
The work deals with the constructional and calculation design of the boiler for burning wood and combustion coal in scale (30/70-coal), in load 50 t/h, parameters of steam output p=7,5 MPa, t=480 °C and a temperature of feed water 105 °C. It is a boiler with natural water circulation by evaporation surfaces. In proposal first steichiometric calculations and enthalpic calculations of air and flue gas are performed. Then it is calculated heat balance, the boiler losses and the thermal efficiency is determined. After designing the combustion chamber and dimensions of pulls are determined. In last chapter the overall energy balance are checked. Drawing documentation of steam boiler is a part of the work.
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The project to replace gas resource by biomass
Lochman, Petr ; Frömel, Zdeněk (referee) ; Baláš, Marek (advisor)
This master’s thesis describes the design and calculation of the biomass hot water boiler which should be used for heating of office buildings in a collective farm. Fuel composition was determined by recommended literature. Stoichiometric calculations were processed for the fuel composition. The required boiler heat output was determined and compared with the original gas boiler, which was previously used for heating. The thermal calculation of the boiler and the design of the heat exchanger was also performed.
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Steam boiler for biomass
Knichal, Jaroslav ; Obrovský, Jan (referee) ; Skála, Zdeněk (advisor)
At present, people already fully aware of how expensive it is energy dependence on fossil fuels. Trying to reduce this dependence goes hand in hand with environmental limits, which restrict the production of dangerous compounds. Biomass is a fuel that does not create large amounts of sulfur and carbon dioxide generated during combustion is in a closed cycle. Different types of biomass have different calorific value, and therefore different demands on the quantity needed to produce MWh. It is therefore necessary to choose the fuel with regard to the availability of in the site.
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Steel structure of library
Karlíková, Magdaléna ; Horáček, Martin (referee) ; Pešek, Ondřej (advisor)
The topic of the bachelor thesis is a design and check of a load-bearing steel structure of a library. The structure is located in Nivnice and it’s ground dimension is 24 x 30 m. Its height, including the attic, reaches 6 m. The building is designed as a single hall, whose ceiling structure is a lattice grate with 1 m height, which is supported by 16 columns. These columns are at an 34 degree angle, which helps with rigidity of the structure. Another element ensuring the rigidity are the ceiling bracings, which are located around the perimeter of both upper and bottom lane of the grate. Roof cladding is attached to the beam of the upper lane in just one direction and the wall cladding is attached to both lanes. Structure is made out of steel S235. Thesis includes the assesment of the main load bearing structure elements, it’s details and drawing solutions.
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Grate Boiler for Wood Chips - 96,4 t/h
Strnad, Ondřej ; Ryšavý, Milan (referee) ; Lisý, Martin (advisor)
This thesis deals with issue of grate boilers. It describes their properties, function principles and usage. The main part of this thesis is design of grate boiler burning biomass with steam output 96.4 tons/hour. Steam temperature and pressure at the output are 490 °C and 8.1 MPa.
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