Search for dissertations about: "STEAM BOILER"

Showing result 1 - 5 of 31 swedish dissertations containing the words STEAM BOILER.

2. 1. Mild Steam Explosion of Norway Spruce

   Author : Kerstin Jedvert; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; kraft cooking; biorefinery; steam explosion; galacto glucomannan; Norway spruce;

   Abstract : The most common wood species in Sweden, and one of the most important renewable raw materials in Northern Europe, is Norway spruce (Picea abies). Today, it is utilized mainly for sawed timber and the production of pulp and paper. READ MORE

4. 2. Deposit Induced Corrosion in Biofuel Combustion

   Author : Petter Andersson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ferritic steel; high temperature corrosion; superheater; waste combustion; CFB; biofuel boiler; waterwall; alkali chloride; deposit induced corrosion; chromate; nickel-based alloy; austenitic steel; martensitic steel; waste boiler;

   Abstract : Deposit induced corrosion is one of the main mechanisms for attack on heat exchangers in biofuel boilers. This severe corrosion decreases the obtainable steam temperature in boilers, thereby the efficiency in production of electricity is reduced. Deposit formation from the gas on superheater tubes are is generally referred to as fouling. READ MORE

5. 3. High temperature corrosion in a biomass-fired power boiler : Reducing furnace wall corrosion in a waste wood-fired power plant with advanced steam data

   Author : Yousef Alipour; Pamela Henderson; Peter Szalalos; Christofer Leygraf; Jan Froitzheim; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High temperature corrosion; Waterwalls; Power plant corrosion; NOx reducing enviroments; Biomass; Waste wood; Thermodynamic calculation modelling; corrosion-resistance alloy; Furnace wall corrosion; Högtemperaturekorrosion; Eldstadsväggar; kraftverks korrosion; låg Nox mijöer; biomassa; returträ; Termodynamisk modellering; korrosionsbeständighet legering; eldstadskorrosion;

   Abstract : The use of waste (or recycled) wood as a fuel in heat and power stations is becoming more widespread in Sweden (and Europe), because it is CO2 neutral with a lower cost than forest fuel. However, it is a heterogeneous fuel with a high amount of chlorine, alkali and heavy metals which causes more corrosion than fossil fuels or forest fuel. READ MORE

6. 4. Furnace Wall Corrosion in a Wood-fired Boiler

   Author : Yousef Alipour; Pamela Henderson; Mikko Hupa; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High Temperature Corrosion; Used-wood Fired Boilers; Furnace Wall Corrosion; Cl-induced Corrosion; 16Mo3; Nickel-based Alloys; FeCrAl Alloys; Fuel Additive; Sewage Sludge; >Thermodynamics Modelling; Högtemperaturkorrosion; Returträ Förbränningspannor; Eldstad Korrosion; klor-inducerad korrosion; 16Mo3; Nickelbaslegeringar; FeCrAl-legeringar; Bränsletillsatser; Avloppsslam; Termodynamik Modellering; Kemi; Chemistry;

   Abstract : The use of renewable wood-based fuel has been increasing in the last few decades because it is said to be carbon neutral. However, wood-based fuel, and especially used wood (also known as recycled wood or waste wood), is more corrosive than virgin wood (forest fuel), because of higher amounts of chlorine and heavy metals. READ MORE

7. 5. System Aspects of Black Liquor Gasification – Consequences for both Industry and Society

   Author : Håkan Eriksson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modelling; Black liquor gasification; Biomass; Combined Cycle; Eco cyclic pulp mill; CHP; Electricity production; Recovery boiler; Gas turbine;

   Abstract : The pulp and paper industry consumes large quantities of biofuels (mainly bark and black liquor) to satisfy process requirements. Biomass is however a limited resource, and biofuel usage should therefore be as effective as possible. READ MORE