Purpose and device
Double drum boilers with natural circulation, with a steam capacity of 16 and 25 tons of steam per hour, respectively, with an allowed pressure of 14 ata, operating on gas and oil fuel.
They are currently produced by the Biysk Boiler Plant, Altai Territory.
Designed to generate saturated steam for process needs, as well as for heating, ventilation and hot water supply. If necessary, they can produce superheated steam, but for this the boilers must be equipped with superheaters.
Consist of two drums: upper and lower. The dimensions of the drums are the same: Øinternal 1000 mm, wall thickness 13 mm, length of the cylindrical part 7500 mm.
Drums are steel cylindrical vessels with convex bottoms at the ends, welded. Both drums have hatches at the front and rear for inspection and repair. Inside the upper drum there are steam separation and water distribution devices, as well as a partition dividing the drum into clean and salty compartments. The partition at the top has a window connecting the steam compartments, and at the bottom there is a pipe
Ø108x4 mm connecting the compartments along the water. Inside the lower drum there is a device for uniform heating when starting the boiler, as well as a solid partition dividing the drum into clean and salty compartments. In addition, perforated pipes for periodic blowing are located in the lower drum.
The drums are connected to each other by a package of convective pipes. To ensure water circulation in the salt compartment, the drums at the rear are connected by unheated drop pipes. In the boiler E(DE) - 16-14 GM there are two of them, and in the boiler E(DE) - 25-14 GM there are three.
To blow soot off convective pipes when boilers operate on fuel oil, they are equipped with devices that penetrate the convective packets in the transverse direction. Boilers E(DE)-16-14 GM have two of them, and boilers E(DE)-25-14 GM have three. The boiler fireboxes are located on the right side of the drums and are protected by four screens: front, rear, side and screen. Screen and convection pipes Ø51x25 mm are welded into the collectors and rolled into the drums. The front screen pipes are rolled directly into the upper and lower drums, and the rear screen pipes are welded into the lower and upper manifolds. The pipes of the right side screen also cover the ceiling of the firebox and are rolled into the lower and upper drums. The screen pipes are located close to each other and steel partitions are welded between them to create a gas-tight firebox wall. At the end of the furnace, the screen pipes are sparsely located and there is no partition between them for the exit of the diesel generator from the furnace into the convective part.
There is one oil-gas burner located on the front walls of the fireboxes.
The boilers rest on the frame with their lower drum, and the frame rests on reinforced concrete foundation. The boilers have light lining, which serves only for thermal insulation. For tightness, the outside of the boiler is sheathed with sheet steel.
Principle of operation
Movement of flue gases. When the gas-air mixture burns in the boiler furnace, flue gases are formed, which move to the rear part of the furnace, where they enter the convective part and, having turned 180° with the full cross-section of the convective part, move to the front of the boiler. At the front of the boiler, flue gases pass through an inclined flue into a flue located above the boiler firebox and along it move to the rear of the boiler to the economizer, smoke exhauster, into the hog, chimney and atmosphere. Forced traction!
Water circulation natural, comes separately in clean and salty compartments. Feed water flows to the water distribution device into a clean compartment, and then through less heated front convective pipes falls into the clean compartment of the lower drum. There, the water enters the remaining pipes of the clean compartment - all of them will be lifting. Normal steam generation occurs in the riser pipes. The steam-water mixture is collected in the upper drum in a clean compartment, where the steam-water mixture is separated into steam and water. The main separation occurs at the evaporation mirror, the secondary separation occurs at the vapor separating device. Then the steam goes to the consumer, and the water goes to the next circulation circle. Water enters the salty compartment from the clean one through an overflow pipe in the partition in the upper drum. There it is mixed with boiler water from the salt compartment, after which it is lowered through special unheated downpipes into the lower drum. Once in the lower drum, the water enters all the other pipes of the salt compartment, which will all be lifting. Normal steam generation occurs in these pipes. The steam-water mixture rises into the salty compartment of the upper drum, where it is divided into steam and water at the evaporation mirror. The steam passes through the window in the partition into the clean compartment and, after passing through the steam separation device, goes to the consumer. The water goes to the next circulation circle.
1. Highly economical - efficiency when operating on gas is up to 94%.
2. Simple in design.
3. Less water and heat loss during continuous blowing.
4. Best quality pair.
DE-25-14 GMO is a steam gas-oil vertical water tube boiler designed to produce saturated or superheated steam to 225 °C, 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.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. Cross section 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.
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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 |
| Temperature feed water, °С | 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.
Steam boiler DE-25-14 GM-O (DE-25-14-225 GM-O)* is a boiler, the main elements of which are the upper and lower drums, a firebox formed by shielded walls, a burner and a bundle of vertical pipes between the drums. These are gas-oil vertical water tube boilers designed to produce saturated steam when burned natural gas, fuel oil, light liquid fuel for the technological needs of industrial enterprises, in heating, ventilation and hot water supply systems.
Explanation of the name of the boiler DE-25-14 GM-O (DE-25-14-225 GM-O)*:
DE – boiler type; 25 - steam production (t/h); 14 – absolute steam pressure (kgf/cm2); GM - boiler for burning gaseous fuel / liquid fuel (diesel and heating household fuel, fuel oil, oil); 225 – temperature of superheated steam, °C (if there is no number – saturated steam); O - boiler supplied with casing and insulation.
Price: 7,493,000 rubles, 7,935,500 rubles (*)
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.
General view of the DE-25-14 GM-O boiler
Basic and additional configurations of the boiler DE-25-14 GM-O
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 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.
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 | |
| Feedwater temperature, °C | 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) | |
