Calculation of production and heating boiler house with DKVR boilers 10-13

Contents

Introduction

1. Water characteristics

2. Boiler Room Building Description

3. Description of mutual arrangement of boiler units and

auxiliary equipment in the boiler room building and beyond

Description of boiler house fuel economy

4. Calculation of number of boilers

5. Boiler room thermal diagram, its description

6. Water deaeration. Diagram of atmospheric deaerator. Calculation and Matching

accumulator tank. Calculation of steam quantity for deaeration

7. Boiler aerodynamic calculation

8. Calculation and selection of feeders

9. Boiler Room Safety

and environmental protection

Conclusion

List of literature

Introduction

In this course design, the calculation of the production boiler house with DKVR boilers 10-13 with cast iron economizers was carried out.

Section 1 details the water used, the quality of the source water, since the reliable and economic operation of boilers depends to a large extent on the quality of the water used to feed it.

Section 2 describes the boiler room, its convenient location, its architectural layout, the construction of parts of the building; and the conditions to be considered in its design.

3 section. This section describes the mutual arrangement of boiler units, and in particular auxiliary equipment in the boiler house itself; the location of boilers, their furnaces, economizers, air distributors, feed, make-up and network pumps, blast fans, heat panels, chemical water treatment equipment, service areas and instrumentation; dimensions of the room; the need to design heating and natural ventilation, as they ensure the removal of contaminated air and the maintenance of the necessary temperature in the boiler room. The fuel economy of the boiler house is described.

Section 4 calculates the number of boilers by heat load.

Section 5 describes in detail the heat scheme of the boiler house, the movement and distribution of the coolant within its limits, namely the movement and distribution of water and steam .

Section 6. Here, the process of removing dissolved gases in feedwater is considered - deaeration. The storage tank volume is calculated and selected. The amount of steam for water deaeration is determined.

In section 7, the boiler was aerodynamically calculated (according to the simplified version), in particular, the gas resistance and air path resistance were calculated. Selection of traction devices. The results of calculations are summarized in Tables 1,2,3.

In section 8, the selection of feeders was made: calculation and selection of the feedwater pump, its head and power, as well as the capacity of the feedwater tank were determined.

The initial data are values:

The location of the boiler house is the city of Angren in Uzbekistan (tnar = 16 ° С);

Steam pressure 14 atm.;

Feedwater temperature (after the deaerator) 80 wasps;

Type of fuel - Angrenskoye field, B2 grade coal

Method of fuel combustion - in the bed;

Estimated steam consumption is 60t/h.

Boiler Room Building Description

According to SNiP II - 35 - 76 "Boiler plants," boiler plants with high pressure boilers (1) operating on water heated above 115 ° C, or at a steam pressure in them of more than 0.7 atm, are taken out to separate rooms.

When designing a boiler house, regardless of how it is located - under buildings or separately from buildings, we stipulate the following:

convenient, simple and economical transportation of heat to consumers;

fuel and ash warehouses near the boiler room;

the most appropriate fuel supply and ash removal scheme.

The boiler building is designed separate from industrial facilities. The size of the building in the plan is 24m wide and 54m long.

The boiler house is designed of a closed type, with the possibility of further increasing the capacity of the boiler house by installing additional boiler units for which the end wall is designed from brick and can be dismantled without the threat of destruction of the main structures. Slab structures rest on longitudinal walls. The longitudinal walls of the boiler house are designed with a high glazing coefficient, which in the event of an accident will reduce the consequences and allow free access for the installation of equipment. The boiler building is designed with a one-story height of 14.6m. Inside the boiler house there are platforms for inspection and maintenance of equipment. Also, 2 exits from the end walls in opposite directions are provided from the boiler house building.

The boiler building is designed with load-bearing structures in the form of columns with a pitch of 6 m. The floor is a 24 m wide railway truss, on which the railway floor slabs are supported.

Description of mutual arrangement of boiler units and auxiliary equipment in the boiler building and beyond. Description of boiler house fuel economy

The layout of the boiler room is the mutual location of the main and auxiliary equipment installed in the building. In accordance with the accepted type of layout, the boiler house consists of the following rooms: rooms for installing a boiler, pump room, chemical water treatment,, office and household premises. Auxiliary equipment, tail heating surfaces (economizers), traction plants and equipment for cleaning combustion products are installed individually.

Boilers are installed on the ground floor. The distance from the wall to the front of the furnace boiler is 4,100 m. Boilers are equipped with individual water economizers and ash traps (battery cyclones). Blast fans are installed in front of boiler plants. Boiler units are located in the boiler room in axes 3-9. The main part of the boiler unit (drums) is located between the axes of the AB, economizers - between the VG, battery cyclones, smoke pumps, a deaerator tank - between the G-D.

The distance between the boilers is 2.0 m. The distance between the extreme boiler unit and the wall is 1.4 m. The width of the passage between the individual protruding parts, the distance between the boilers and the rear wall, as well as the passages between the rest of the equipment is 1 m. The areas for servicing valves and instrumentation have a width of at least 800 mm, and the width of the stairs is 600 mm. On the first floor of the boiler house there are also feed, make-up (19), recirculation and network pumps (16), equipment for chemical treatment of water (22), and a reducer for reducing steam pressure. At the level of the second floor there is a deaerator (11) and a vapor cooler (28).

The room for network pumps (16) and water treatment equipment are located in the left part of the boiler building (axis 1-3), where administrative rooms are located on separate floors.

The distance from the upper working platform intended for servicing boilers or economizers to the lower structural parts of the boiler house cover is not less than 2 m.

The boiler building includes the following rooms: boiler and machine rooms, workshops, office, household. The boiler house also has rooms for a transformer substation. The placement of equipment, and therefore separate rooms in the boiler room, takes into account the possibility of its expansion without stopping work. For this purpose, one of the end walls is left free in the boiler building. It is not allowed to arrange basements in boiler rooms, all equipment (with the exception of condensate and partially ash removal) is installed at the level of the adjacent area or slightly higher. The foundations of the bases of the semi-deep smoke burrows of channels and utility structures are 300 mm higher than the level of standing ground water.

The boiler building has heating and natural ventilation, ensuring the removal of contaminated air (and sometimes for air inflow) and maintaining the necessary temperature in the production rooms.

Solid fuel is delivered to boiler sites either by road or by rail.

At the boiler house, a consumable warehouse was built, where fuel is delivered and placed in stacks. To move fuel from storage and inside boiler house, belt conveyor is used, by means of which fuel is supplied to bunkers of boilers. The conveyor is located at an altitude of 11.70 m.

The chimney is located at a distance of 7.65 m from the boiler building.

Conclusion

The course project was carried out according to the task using all the necessary reference and regulatory literature, and the latest calculation methods.

As a result of the calculations, the number of boilers, the necessary dimensions of the deaerator, the number and size of feeders were determined, as well as the aerodynamic calculation of the boiler unit.

The graphic part shows all necessary pipelines, equipment, diagrams.