RU2362094C1 - Boiler with forced circulation - Google Patents

Abstract

FIELD: instrument making.

SUBSTANCE: invention relates to heat-and-steam production and can be used in heat engineering. The proposed boiler comprises combustion chamber made up of horizontal tubes, interconnected by headers and convective chamber. The latter is made up of horizontally mounted bundles of "П"-shape tubes and screen-side panels. Combustion and convective chambers tubes make an integral water path. The tubes of aforesaid screen-side panels of convective chamber accommodate vertical partitions with two holes made in their upper and lower parts. Aforesaid headers feature partitions with one hole.

EFFECT: higher reliability and efficiency.

6 dwg

Description

The invention relates to the field of heat or steam and can be used to create once-through steam and hot water boilers.

Known boiler with forced circulation, containing a combustion chamber made of horizontal pipes interconnected by collectors, and a convective part (patent RU No. 2157483, class F22B 15/00, 1998).

A disadvantage of the known boiler with forced circulation is the low reliability of the boiler, due to the low speeds of the water, which leads to overheating of both water and metal, while to create high speeds it is necessary to use more powerful pumps, which leads to the uneconomical use of the boiler.

The technical result, the achievement of which the present invention is directed, is to increase the reliability and efficiency of the boiler with forced circulation without increasing power.

The specified technical result is achieved due to the fact that in the boiler with forced circulation, containing a combustion chamber made of horizontal pipes interconnected by collectors, and a convective part, according to the invention, the convective part is made of horizontally arranged packets drawn from U-shaped pipes and screen side panels, while the pipes of the combustion chamber and the convective part form a single water path, vertical pipes are installed in the pipes of the screen side panels of the convection part of the boiler flax baffle with two apertures made in the lower and upper parts of walls and partitions into reservoirs fitted with one hole.

The formation of a single water path by the pipes of the combustion chamber and the convective part became possible due to the fact that in the pipes of the screen side panels of the convective part of the boiler, vertical partitions are installed with two holes made in the lower and upper parts of the partition, and partitions with one hole are installed in the collectors.

Figure 1 shows a longitudinal section of a boiler with forced circulation.

Figure 2 - section of the boiler along aa.

In figure 3, 4 - the site of the boiler B.

In Fig.5, 6 - the site of the boiler B.

The forced circulation boiler contains a combustion chamber 1 and a convective part 2. The combustion chamber 1 is made of horizontal pipes 3 connected by collectors 4. The convective part 2 is made of horizontally arranged bags drawn from U-shaped pipes 5 and screen side panels, which are common for the convection part and the combustion chamber and are made of pipes 6. In the pipes 6 of the screen side panels of the convection part 2 of the boiler, vertical partitions 7 with two holes 8 are made in the lower and upper th parts of the partition 7 (Figure 4, section DD).

In the collectors 4, partitions 9 are installed (Fig. 3, view B).

The boiler is equipped with air vents 10 and drains 11. Hot water from the boiler enters the consumer through line 12 and returns to the boiler via line 13.

The proposed boiler with forced circulation as part of a boiler installation (not shown) works as follows. Fuel and air are supplied through the burner 14 to the combustion chamber 1, where the fuel burns with heat. The combustion products are cooled in the convective part 2 and emitted into the chimney (not shown). The heat received during the combustion of fuel is absorbed by water through the heating surfaces — collectors 4, screen tubes 3 and pipes 5 of the convective part 2.

Partitions 9 with a hole 15 (Figure 3, section G-D) installed in the collectors 4, make the water change direction of movement along the screen tubes 3, as shown by arrows 16 (Figure 3). Partitions 9 in the collectors 4 are arranged so that water flows along the same number of pipes 3. This allows you to have the same water speed in the pipe system, thereby reducing thermal and hydraulic scans in the circuit.

Partitions 7 serve to direct the flow of water into the pipes 5 of the convective part 2 - shown by arrows 17 (Figure 3, view B). The use of partitions 7, which are made with two holes 8 (Figure 4, section DD), installed in the pipes 6 in the convective part of the side screens, allows you to arrange convective packets drawn from U-shaped pipes 5, horizontally (Figure 2) and strengthen them on the pipes 3 of the combustion chamber, creating a single water path.

During operation, after stopping the boiler, drainage taps 11 are opened to empty it, and when filling it with water, air taps 10 are opened (with closed drains 11). Moreover, in the blind compartments formed by the partitions 9, the function of the drains and air vents is performed by the holes 15 in the partitions 9 (Figure 3, section G-D). From the deaf compartments formed by the partitions 7, the water is removed during emptying through the hole 8 located in the lower part of the partition 7, and when filling the boiler with water, air leaves through the hole 8 located in the upper part of the partition 7.

The presence of a single water path of the combustion chamber 1 and convection part 2 with horizontally located convective bags made of U-shaped pipes 5 significantly reduces the hydraulic resistance of the boiler (which allows the use of pumps of lower power), makes the boiler simple to manufacture, and the boiler design can be used in many variants of the same type boilers of various capacities. Partitions 9 with one hole 15, installed in the collectors 4, reduce thermal and hydraulic reamers in the circuit and eliminate the need for the use of drains and air vents in the blind compartments of the collectors.

The presence in the pipes 6 of the screen side panels of the convective part 2 of the boiler, vertical partitions 7 with two holes 8, made in the lower and upper parts of the partition 7, allows you to ensure optimal speed of water movement. Optimum speeds of movement of water allow to avoid an overheat of water and metal.

Thus, the use in the proposed boiler with forced circulation of partitions with one hole in the collectors and partitions with two holes in the pipes of the side screens promotes the formation of a single water path by the pipes of the combustion chamber and the convective part, makes the hydraulic circuit of the boiler optimal, simplifies its design and manufacture due to the use of simple, the same type of elements, reduces the boiler metal consumption and increases the reliability in operation and efficiency in operation compared to the prototype; makes it possible to create many variants of the same type boilers of various capacities.

Claims (1)

A forced circulation boiler comprising a combustion chamber made of horizontal pipes interconnected by collectors and a convective part, characterized in that the convective part is made of horizontally arranged packets drawn from U-shaped pipes and screen side panels, the pipes of the combustion chamber and the convective part form a single water path, in the pipes of the screen side panels of the convective part of the boiler, vertical partitions are installed with two holes made in the lower and erhney parts of walls and partitions are installed in the collectors with one hole.

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