DKVR 6.5-13 (note and drawing)

Contents

1. Source Data

2. Characteristics of boiler unit working bodies

2.1. Fuel

2.2. Coolant (water)

3. Description of boiler design and accepted boiler unit layout. Technical characteristics of the selected boiler

4. Calculation of volumes and enthalpies of air and combustion products

4.1. Determination of suction tanks and excess air coefficients for individual gas ducts

4.2. Determination of air volumes and combustion products

4.3. Determination of enthalpy of air and combustion products

5. Heat balance of boiler unit and fuel consumption

6. Thermal calculation of furnace

7. Calculation of convective heating surfaces

7.1. Calculation of boiler convective bundles

7.2. Water economizer calculation

8. Determination of heat balance misalignment of boiler unit

List of literature

Characteristics of boiler unit working bodies.

The role of working bodies involved in the process of thermal transformations is played by fuel, air and water.

As a heat source, we use a steam heat generator. It produces saturated steam. In order for steam to be generated, we must burn fuel. Oxidizer (air) is supplied to the furnace in order for combustion process to take place. The fuel, burning in the furnace, forms hot gases that move along the gas ducts of the boiler unit, giving heat to the heating surfaces. The gases are then cooled and released into the environment.

Steam or water is usually used as heat carrier in boiler plants.

The boiler unit is a generator in which the chemical energy of the fuel is converted to heat.

Check calculation of heat generator of DKVR6.5-13 type is performed in this work.

The purpose of the calculation is to determine the temperature of water, steam, air, flue gases at the boundaries between certain surfaces of the boiler unit, as well as fuel consumption, boiler efficiency, flue gas flow rate and speed according to the given structures and dimensions of the heat generator.

Structural calculation of water cast iron economizer of non-boiling type of VTI system is also performed in order to determine its design and dimensions.

The general task of course work is to create an effective arrangement of a heat generating unit from its individual parts.

Heat carrier (water).

Water quality indicators:

transparency - content in 1kg. water of suspended substances (mg/l) easily removed by filtration;

dry residue - precipitate in (mg), consisting of mineral and organic impurities obtained after evaporation of 1kg. filtered water and after drying;

stiffness - content in 1kg. water of dissolved calcium and magnesium salts;

alkalinity - content in 1kg. water of dissolved hydrates, carbonates and bicarbonates;

degree of acidity or alkalinity - is characterized by the composition of dissolved salts and gases and is determined by the concentration of hydrogen and hydroxyl ions.

Water treatment involves:

1. removal of suspended impurities (mechanical filters);

2. reduced stiffness, i.e. softening (cation exchange method);

3. maintaining a certain amount of alkalinity;

4. reduced total salt content;

5. Gas removal (CO2);

ДКВР-6,5-13.cdw