The main elements of boilers are:
1.Upper and lower drums;
3.The left combustion screen is gas-tight;
5.Right combustion screen, the pipes of which are made in the form and overlap the ceiling and the lower part of the firebox (under);
5.Front screen;
6.Rear screen;
7.Two manifolds of the rear combustion screen, made 0 159 * 6 mm;
8. Convective tube bundle;
9. Brickwork;
10.Metal frame;
11.Metal casing;
12.Headset;
13.Fittings;
14.Control and measuring instruments;
15. Three lower pipes, 0 159 * 6 mm for boilers with a steam capacity of up to 16 t/h and 0 219 * 6 mm for DE-25-14 boilers;
16. Recirculation pipe of the rear screen;
17.The blowing device is located on the left side of the convective beam;
18. Boiler piping.
The boiler drums are made of high-quality steel grade 16 GS, internal diameter 1000 mm. The thickness of the drum walls is 13 mm. The convective beam is made along the entire length of the drums from pipes with a diameter of 51ˣ2.5 mm. The left combustion screen is made of pipes 0 51*4 mm. The right combustion screen, front and rear screens are made of pipes d = 51˟2.5 mm. Two rear screen collectors are made of pipes d = 159ˣ6 mm. The recirculation pipe is made of a pipe with a diameter of 76ˣ3.5 mm. Three down pipes with a diameter of 259ˣ6 mm (boilers DE-25-14).
The length of the cylindrical part of the drums increases from 2250 mm for DE-4-14 boilers to 7500 mm for DE-25-14 boilers. The center-to-center distance of the drums is 2750 mm. For access to the inside of the drums, there are manholes in the front and rear bottoms of the drums.
The width of the convective beam is 890 mm for boilers 4; 6.5 and 16 tons of steam and 1000 mm for boilers with a steam capacity of 10 and 25 tons of steam per hour.
The pitch of the convective bundle pipes along the drums is 90 mm, transverse - 110 mm. The middle row of convective bundle pipes along the axis of the drums has a pitch of -120 mm. The pipes of the outer row of the convective bundle have a longitudinal pitch of -55 mm. At the entrance to the drums, the pipes are separated into two rows.
In convective bundles of boilers with a steam capacity of 4; 6.5 and 10 tons of steam per hour, to ensure the required flue gas velocities, longitudinal steel partitions are installed
Boilers with a steam capacity of 16 and 25 tons of steam per hour do not have partitions in the convective beam, and the speed of movement of the flue gases is maintained by changing the width of the convective beam (1000 mm).
The convective beam is separated from the combustion chamber by a gas-tight left combustion screen. Gas tightness is ensured by registering metal plates between the pipes along their entire height from the lower drum to the upper drum.
In the rear part of the left combustion screen, metal plates (spacers) are not installed; the pipes of the rear part of the convective bundle are made in a corridor and form “windows” for the flow of flue gases from the furnace into the convective bundle.
The areas where the screen pipes are routed at the entrance to the drums are compacted with chamotte concrete.
The pipes of the right combustion screen form the bottom and ceiling of the firebox.
Front screen pipes in the amount of 4 or 2 (various modifications of boilers) border the burner embrasure on the right and left and are inserted into the upper and lower drums (see in the figure).
Boiler DE-25-14 GM (Rear view)
Cross section combustion chamber is the same for all boilers. The average height of the combustion chamber is 2400 mm, width 1790 mm. The depth of the combustion chamber increases with increasing boiler steam production from 1930 mm for DE-4-14 boilers to 6960 mm for boilers with 25 tons of steam per hour.
The main part of the pipes of the convective bundle, the right combustion screen, as well as the pipes of the front screen are connected to the drums by flaring.
The pipes of the gas-tight partition, as well as part of the pipes of the right combustion screen and the outer row of the convective beam, are welded to the drums by electric welding.
The pipes of the rear furnace screen are welded to the lower and upper collectors 0 159 * 6 mm. The collectors, in turn, are welded to the upper and lower drums.
The ends of the collectors on the side opposite the drums are connected by an unheated recirculation pipe 0 76 * 3.5 mm.
On all boilers, to protect against overheating on the combustion side of the recirculation pipe and the collectors and pipes of the rear screen, two tubes 0 51 * 2.5 mm are installed in the combustion chamber, connected to the drums by flaring (see Fig. No. 2, page 6).
DE boilers with a steam capacity of up to 10 t/h have four circulation circuits:
Water circulation circuit of the convective beam and the left combustion screen;
Circulating water circuit of the right combustion screen;
Front screen water circulation circuit;
Water circulation circuit of the rear combustion screen.
In boilers DE-16-14 and DE-25-14, which have partitions inside the drums and 2-stage evaporation, water circulation is much more complicated.
Boilers with steam capacity 4; 6.5 and 10 tons of steam per hour work with single-stage evaporation. In boilers with a steam capacity of 16 and 25 tons of steam per hour, 2-stage evaporation is used. For these purposes, metal partitions are made in the drums dividing the drums into two compartments: a large compartment - finishing and a small compartment - salt. In the upper drum, the partition is not continuous, that is, it does not cover the entire diameter of the drum.
A solid partition is installed in the lower drum.
In the second stage of evaporation, using transverse partitions in the drums, the following are placed:
Rear part of the left and right firebox screens;
Rear screen;
Part of a convective bundle of pipes located in an area with more high temperatures flue gases.
The second stage of the upper drum is supplied with water through an overflow pipe 0133 mm long, at least 2 meters long, passing through the dividing partition of the upper drum.
The second stage evaporation circuit has three lower unheated pipes 0159*6 mm, for DE boilers with a steam capacity of up to 16 tons of steam per hour and 0219*6 mm for DE-25-14 boilers.
The drainage system of the salt compartment circuit consists of unheated pipes. The downward system of the first stage of evaporation consists of the last rows of convective bundle pipes along the gas flow.
Separation devices are located in the steam volume of the upper drum: perforated a metal sheet and plate separators.
In the water volume of the upper drum there is a feed pipe and a pipe for introducing chemical reagents. Guide shields and visors for cleaning steam from hardness salts.
The upper drum of the boiler also contains calming speakers and impulse tubes from the finishing and salt compartments to the water level indicators.
Water level indicators are connected to pipes (impulse pipes) coming from the steam and water volumes from the finishing and salt compartments of the upper drum.
Gas-oil vertical water tube boiler designed to produce saturated or superheated to 225 ° C steam used for technological needs, heating, ventilation and hot water supply. Distinctive feature The boiler, like the entire DE series of steam boilers, is the location of the combustion chamber on the side of the convective beam formed by vertical pipes flared in the upper and lower drums.
General view of the DE-25-14 GM-O boiler
Basic and additional configurations of the DE-25-14 GM-O boiler
Technical information on DE-25-14 GM-O
DE (E) type boilers consist of upper and lower drums, a pipe system and components. Steel or cast iron economizers are used as tail heating surfaces. Boilers can be equipped with both domestic and imported burners. Dgut type boilers are equipped with a heating surface cleaning system.
For all standard sizes of boilers, the internal diameter of the upper and lower drums is 1000 mm. The cross-section of the combustion chamber is also the same for all boilers. However, the depth of the combustion chamber increases with increasing steam production of boilers.
The combustion chamber of DE boilers is located on the side of the convective beam, equipped with vertical pipes flared in the upper and lower drums. The combustion unit is formed by a convective beam, front, side and rear screens. The convective beam is separated from the combustion chamber by a gas-tight partition, in the rear part of which there is a window for the entry of gases into the beam. To maintain the required level of gas velocity in convective beams, longitudinal stepped partitions are installed and the width of the beam is changed. Flue gases, passing through the entire cross-section of the convective beam, exit through the front wall into the gas box, which is located above combustion chamber, and they pass along it to the economizer located at the rear of the boiler.
In the water space of the upper drum there is a feed pipe and a pipe for introducing sulfates, and in the steam volume there are separation devices. The lower drum contains a device for steam heating of water in the drum during kindling and pipes for draining water, perforated pipes for continuous blowing.
DE type boilers use a single-stage evaporation scheme. The water circulates as follows: heated nutrient water is supplied to the upper drum under the water level. Water enters the lower drum through screen pipes. From the lower drum, water enters the convective beam, when heated, turning into a steam-water mixture, and rises to the upper drum.
The following fittings are installed on the upper drum of the boiler: main steam valve, valves for steam sampling, steam sampling own needs. Each boiler is equipped with a pressure gauge, two spring safety valves, one of which is a control valve. For ease of maintenance, DE boilers are equipped with stairs and platforms.
Technical characteristics DE-25-14 GM-O
| Index | Meaning | |
| Boiler type | Steam | |
| Type of design fuel | Gas, Liquid fuel | |
| Steam capacity, t/h | 10 | |
| Operating (excess) coolant pressure at the outlet, MPa (kgf/cm2) | 1,3(13,0) | |
| Steam outlet temperature, °C | sat. 194 | |
| Temperature feed water, °С | 100 | |
| Estimated efficiency (gas fuel), % | 93 | |
| Estimated efficiency (liquid fuel), % | 91 | |
| Estimated fuel consumption (gas fuel), kg/h (m3/h - for gas and liquid fuel) | 1762 | |
| Estimated fuel consumption (liquid fuel), kg/h (m3/h - for gas and liquid fuel) | 1670 | |
| Dimensions of transportable unit, LxBxH, mm | 9390x3090x4032 | |
| Layout dimensions, LxBxH, mm | 10095x5240x6072 | |
| Weight of transportable boiler block, kg | 23500 | |
| Type of delivery | Assembled (transportable boiler block) | |
DE-25-14 GM-O- a steam gas-oil vertical water tube boiler designed to produce saturated or superheated to 225 ° C steam used for technological needs, heating, ventilation and hot water supply. A distinctive feature of the boiler, like the entire DE series of steam boilers, is the location of the combustion chamber on the side of the convective beam formed by vertical pipes flared in the upper and lower drums.
Technical characteristics of the boiler DE-25-14 GM-O
| Indicator name | Meaning |
| Boiler type | Steam |
| Type of design fuel | Gas, liquid fuel |
| Steam production, t/h | 25 |
| Operating (excess) coolant pressure at the outlet, MPa (kgf/cm2) | 1,3 (13,0) |
| Steam outlet temperature, °C | saturated, 194; overheated, 225 |
| Feedwater temperature, °C | 100 |
| Estimated efficiency, % | 93 |
| Estimated efficiency (2), % | 90 |
| Estimated fuel consumption, kg/h | 1762 |
| Estimated fuel consumption (2), kg/h | 1670 |
| Dimensions of transportable unit, LxBxH, mm | 9250x3090x4032 |
| Layout dimensions, LxBxH, mm | 10095x5240x6117 |
| Weight of transportable boiler block, kg | 23765 |
Complete set of steam boiler DE-25-14 GM-O
Design and operating principles of DE-25-14
DE (E) type boilers consist of upper and lower drums, a pipe system and components. Steel or cast iron economizers are used as tail heating surfaces. Boilers can be equipped with both domestic and imported burners. DE type boilers can be equipped with a heating surface cleaning system.
For all standard sizes of boilers, the internal diameter of the upper and lower drums is 1000 mm. The cross-section of the combustion chamber is also the same for all boilers. However, the depth of the combustion chamber increases with increasing steam production of boilers.
The combustion chamber of DE boilers is located on the side of the convective beam, equipped with vertical pipes flared in the upper and lower drums. The combustion unit is formed by a convective beam, front, side and rear screens. The convective beam is separated from the combustion chamber by a gas-tight partition, in the rear part of which there is a window for the entry of gases into the beam. To maintain the required level of gas velocity in convective beams, longitudinal stepped partitions are installed and the width of the beam is changed. Flue gases, passing through the entire cross-section of the convective beam, exit through the front wall into the gas box, which is located above the combustion chamber, and pass through it to the economizer located at the rear of the boiler.
In the water space of the upper drum there is a feed pipe and a pipe for introducing sulfates, and in the steam volume there are separation devices. The lower drum contains a device for steam heating of water in the drum during kindling and pipes for draining water, perforated pipes for continuous blowing.
DE type boilers use a single-stage evaporation scheme. The water circulates as follows: heated nutrient water is supplied to the upper drum under the water level. Water enters the lower drum through screen pipes. From the lower drum, water enters the convective beam, when heated, turning into a steam-water mixture, and rises to the upper drum.
The following fittings are installed on the upper drum of the boiler: the main steam valve, valves for sampling steam, and taking steam for auxiliary needs. Each boiler is equipped with a pressure gauge, two spring safety valves, one of which is a control valve. For ease of maintenance, DE boilers are equipped with stairs and platforms.
Technological solutions TM4Total information
Equipment layout. Plan at elevation 0.000. View from above. Sections A-A, B-B
Gas ducts of the boiler DE-25-14GM. Plan
Gas ducts of the boiler DE-25-14GM. Sections A-A, B-B. Node I
Gas ducts of the boiler DE-25-14GM. Section B-B. Plan G-G
Air ducts of the boiler DE-25-14GM. Sections A-A, B-B. Node I. Plan at elevation. 2.700
Feedwater pipelines. Plan. Section A-A
Steam pipelines P = 1.37 MPa (14 kgf/sq. cm). Plan. Sections A-A, B-B, B-C
Steam and fuel oil pipelines within the DE-25-14GM boiler. Plan. Sections A-A, B-B
Exhaust, purge and drainage pipelines of the DE-25-14GM boiler. Plan. Section A-A
Exhaust, purge and drainage pipelines of the DE-25-14GM boiler. Sections B-B, V-C, D-G
Piping pipelines KTAN'a-0.8UG and heater KPZ-11-SK-0.1UZ. Plan. Sections A-A, B-B
Scheme of drainage and purge of steam pipeline P = 1.37 MPa (14 kgf/sq. cm)
Additional ladders for boiler DE-25-14GM. Plan. Section A-A
Blowing device DN32. Section A-A
General form thermal insulation for a section of a flat wall. Development task
Gas supply GSV2
Total information
Gas equipment for boiler DE-25-14GM. Boiler front. Plan
Specification for gas equipment of the boiler DE-25-14GM
Gas equipment for economizer EB1-808I. View A
Reinforced concrete structures KZh2
Pendant layout diagram. Total information
Layout of underground structures
Fragment 1. Section 7-7. FOM1. Formwork and reinforcement
FOM2. Formwork and reinforcement. Cuts 2-2…8-8; section a-a
Layout diagram metal structures
Metal frames MP1, MP2
Metal frame MP3. Site L1
Metal technical specification
Automation ATM2
Boiler DE-25-14GM. Total information
Boiler DE-25-14GM. Automation scheme
Boiler DE-25-14GM. Electrical circuit diagram of power supply
Boiler DE-25-14GM. Electrical circuit diagram for controlling a valve on steam
Boiler DE-25-14GM. Electrical circuit diagram for controlling a valve on a fuel oil pipeline
Boiler DE-25-14GM. Electrical circuit diagram of the fuel regulator
Boiler DE-25-14GM. Electrical circuit diagram of the level regulator
Boiler DE-25-14GM. Electrical circuit diagram of the air regulator
Boiler DE-25-14GM. Electrical circuit diagram of the vacuum regulator
Boiler DE-25-14GM. External wiring diagram
Boiler DE-25-14GM. External wiring connection diagram
Gas pulse cleaning. Automation diagram for external wiring and connections
Boiler DE-25-14GM. Layout plan
Boiler DE-25-14GM. Installation of MEO-100/25-0.25U to valve 9s-4-2 on the fuel oil pipeline to the boiler
Boiler DE-25-14GM. Installation of MEO-100/25-0.25U to the KRP-50m valve on the feed water pipeline to the boiler
Boiler DE-25-14GM. Installation of MEO-250/63-0.25U for smoke exhauster DN-12.5
Boiler DE-25-14GM. Installation of MEO-100/25-0.25U to the VDN-11.2 fan
Boiler DE-25-14GM. Installation of MEO-100/25-0.25U to the regulating disk valve 32TsO22BK Du150
Boiler DE-25-14GM. Installation of an electromagnet MIS-4100 on a safety shut-off valve type PKN Du200 DE-25-14 GMO - a steam gas-oil vertical water tube boiler designed to produce saturated or superheated to 225 °C steam used for technological needs, heating, ventilation and hot water supply. A distinctive feature of the boiler, like the entire DE series of steam boilers, is the location of the combustion chamber on the side of the convective beam formed by vertical pipes flared in the upper and lower drums.
DE (E) type boilers consist of upper and lower drums, a pipe system and components. Steel or cast iron economizers are used as tail heating surfaces. Boilers can be equipped with both domestic and imported burners. DE type boilers can be equipped with a heating surface cleaning system.
For all standard sizes of boilers, the internal diameter of the upper and lower drums is 1000 mm. The cross-section of the combustion chamber is also the same for all boilers. However, the depth of the combustion chamber increases with increasing steam production of boilers.
The combustion chamber of DE boilers is located on the side of the convective beam, equipped with vertical pipes flared in the upper and lower drums. The combustion unit is formed by a convective beam, front, side and rear screens. The convective beam is separated from the combustion chamber by a gas-tight partition, in the rear part of which there is a window for the entry of gases into the beam. To maintain the required level of gas velocity in convective beams, longitudinal stepped partitions are installed and the width of the beam is changed. Flue gases, passing through the entire cross-section of the convective beam, exit through the front wall into the gas box, which is located above the combustion chamber, and pass through it to the economizer located at the rear of the boiler.
In the water space of the upper drum there is a feed pipe and a pipe for introducing sulfates, and in the steam volume there are separation devices. The lower drum contains a device for steam heating of water in the drum during kindling and pipes for draining water, perforated pipes for continuous blowing.
DE type boilers use a single-stage evaporation scheme. The water circulates as follows: heated nutrient water is supplied to the upper drum under the water level. Water enters the lower drum through screen pipes. From the lower drum, water enters the convective beam, when heated, turning into a steam-water mixture, and rises to the upper drum.
The following fittings are installed on the upper drum of the boiler: the main steam valve, valves for sampling steam, and taking steam for auxiliary needs. Each boiler is equipped with a pressure gauge, two spring safety valves, one of which is a control valve. For ease of maintenance, DE boilers are equipped with stairs and platforms.
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