RU177978U1 - Water tube boiler - Google Patents

Abstract

The utility model relates to the field of heat engineering and is intended to produce heat and steam. A hot water boiler containing two end walls, between which there is a combustion chamber and a heat exchanger from finned tubes parallel to the chamber, a cooled chamber is located on one of the walls, in communication with one of the main pipes and two outlets with one of the finned tubes each, which are behind the walls communicated in zigzag form relative to the walls by tubular jumpers, with one branch forming a single path with half finned tubes, and the other with the second half, where the other ends of each coil of finned tubes withdrawn in another main nozzle. The constructive implementation of the proposed hot-water boiler with forced circulation contributes to the reduction of dimensions, the formation of a single water path of the furnace and convection part, makes the hydraulic circuit of the boiler optimal, simplifies its design and manufacture through the use of simple, similar elements, reduces the boiler’s metal consumption and increases operational reliability and economy in comparison with the prototype, makes it possible to create many variants of the same type of boilers of various capacities. 2 s.p. f-ly. 5 ill.

Description

The utility model relates to the field of heat engineering and is intended to produce heat and steam.

A well-known hot water boiler containing two end walls, between which there is a combustion chamber and a heat exchanger from finned tubes parallel to the furnace (patent RU 2559109 class. F24H 1/00, publ. 08/10/2015).

A disadvantage of the known boiler is the complexity of manufacturing, due to the complexity of welding the reversal bends of the heat exchanger, the need to produce a complex metal-intensive opening cover and the difficulty of removing air and draining water from the heat exchanger. Large dimensions of the boiler and, as a consequence, large metal consumption. Which leads to a rise in price of the boiler and low competitive ability in the market.

The technical problem of the utility model is the elimination of the noted drawbacks. The technical result, the achievement of which is directed by a real utility model, is to increase reliability, efficiency and reduce manufacturing costs.

The problem is solved, and the technical result is achieved due to the fact that in the boiler there are two end walls, between which there is a combustion chamber and a heat exchanger from finned tubes parallel to the chamber, there is a cooled chamber on one of the walls in communication with one of the main pipes and two branches with one of the finned tubes each, which behind the walls are communicated in zigzag form relative to the walls by tubular bridges, and one branch forms a single path with half a fin pipes, and the other with the second half, where the other ends of each half of the finned tubes are led into another main pipe.

Finned tubes can be placed in cross section around a circle or oval, the major axis of which is located vertically.

Due to the fact that the heat exchanger consists of separate parts that can be manufactured separately on the conductor, welding of finned tubes has been greatly simplified, which, unlike the prototype, is fastened directly to the front and rear walls without additional welding to the position plates. With this design, it is possible to manufacture a heat exchanger with one row of pipes located around the combustion chamber not only around the circumference, but also along the oval. It also became possible not to make a laborious and metal-intensive front cover, reduce the number of drainage and air taps and solve the problem of boiler airing.

In FIG. 1 shows a perspective view of the proposed boiler in front; in FIG. 2 - the same, rear view; in FIG. 3 is a side view of the boiler; in FIG. 4 - the same front view; in FIG. 5 - node A in FIG. 4. The drawings show the location of the finned tubes in an oval, the major axis of which is located vertically.

The boiler has forced circulation and contains a combustion chamber 1 (Fig. 1), a heat exchanger 2 (Figs. 1, 2, 3), a front end wall 3 and a rear end wall 4. The heat exchanger is made of finned tubes 5 (Fig. 1). On the wall 3 there is a cooled chamber 6 (Fig. 1, 4). The boiler is equipped with air taps 7 and drainage taps 8 (Fig. 1, 4). Hot water from the boiler enters the consumer through the main pipe 9 and returns back to the boiler through the main pipe 10 (Fig. 1-4). The cooled chamber is in communication with the main pipe 10 and two branches 12. The finned tubes 5 behind the walls are connected in a zigzag fashion with the tubular bridges 13. One branch forms a single path with half of the finned tubes, and the other with the second half. The upper pipes of the halves through the adapter are led into the main pipe 9 located behind the wall 4. The finned pipes can be placed in cross section along a circle or oval, the major axis of which is located vertically.

The boiler with forced circulation as part of a boiler installation (not shown) works as follows. Fuel and air is supplied through the burner 11 to the combustion chamber 1, where the fuel burns with heat. The combustion products are cooled in a heat exchanger, transferring heat through the pipe body and fins, on which reflectors 14 are mounted (Figs. 4, 5), which make the combustion products work out as efficiently as possible and then are removed into the chimney (not shown). The heat received during the combustion of fuel is absorbed by water through the heating surfaces, finned tubes 5 and the front cooled chamber 6. The coolant through the return pipe 10 enters the front cooled chamber 6. Then it enters parallel flows through outlets 12 (Fig. 1, 4) from finned tubes 5, through which it moves, turning around in tubular jumpers 13 (Figs. 1, 2, 3, 4, 5), gradually heating up from the combustion products to the desired temperature, and is removed from the boiler to

to the consumer through the main supply pipe 9. This design avoids airing the boiler during operation, has the same water speed in the pipe system and reduces thermal and hydraulic scans in the circuit.

Replacing the supply pipe 9 to the return pipe 10, that is, a change in the direction of movement of the coolant does not affect the operation of the boiler. Optimum speeds of movement of water allow to avoid an overheat of water and metal. During operation, after stopping the boiler, drainage taps 8 are opened to empty it, and when filling it with water, air taps 7 are opened (when drainage is closed).

Thus, the constructive implementation of the proposed hot-water boiler with forced circulation contributes to the reduction of dimensions, the formation of a single water path of the furnace and convection part, makes the hydraulic circuit of the boiler optimal, simplifies its design and manufacture through the use of simple, similar elements, reduces the boiler’s metal consumption and increases reliability in operation and efficiency in operation compared to the prototype, makes it possible to create many options for the same type of boilers of various th power.

Claims (3)

1. A hot-water boiler containing two end walls, between which a combustion chamber and a heat exchanger are arranged from finned tubes parallel to the chamber, characterized in that a cooled chamber is located on one of the walls, in communication with one of the main pipes and two outlets from one of the finned each pipe, which behind the walls are communicated in zigzag relative to the walls by tubular jumpers, and one branch forms a single path with half of the finned tubes, and the other with the second half, where the others ontsy each half of the finned tubes withdrawn in another main nozzle. 2. The boiler according to claim 1, characterized in that the finned tubes are placed in cross section around the circumference. 3. The boiler according to claim 1, characterized in that the finned tubes are placed in cross section along an oval, the major axis of which is located vertically.

Images