RU191486U1 - SECTIONAL WATER BOILER - Google Patents

Abstract

The utility model relates to the field of heat engineering and can be used in autonomous heat supply systems of buildings equipped with water heating systems. The technical result is an increase in the surface area of heat transfer, intensification of heat transfer, intensification of the combustion process, and, consequently, increase in boiler efficiency. The technical result is achieved by that in a sectional boiler containing a heat exchanger in the form of a package of sections, each of which is made in the form of a cast-iron of the rim profile, hollow inside, with rounded corners, the sections are interconnected so that the lower openings form a furnace space, and the upper convective flues, according to this utility model, the sections are structurally designed so that the middle sections are connected to each other and to the back section with the formation between the furnace space and the flue gas ducts, which serve for the partial flow of flue gases from the furnace space into the flue ducts, between the ribs of which the tape swirl is rigidly fixed eh, and above the upper surface of the sections is a collector for flue gas.

Description

The utility model relates to the field of heat engineering and can be used in autonomous heating systems of buildings equipped with water heating systems.

An analogue is a sectional heating boiler made of cast iron or aluminum (Patent RU 2495336 dated 10.10.2013), consisting of annular sections, which are the front section, having the form of a cover, the rear section and at least one middle section, which form the combustion chamber with its covering ducts for the passage of highly heated flue gases, and the annular water cavities of the sections are interconnected by openings in the bosses, have a lower connection for the return line and an upper connection for the supply line, as well as at least two yazhnyh rod fastening between a section in a single unit.

The disadvantage of the analogue is the lack of intensification of heat transfer in the boiler flues.

The prototype is a hot-water heating boiler (RF Patent No. 2543924 of 03/10/2015) containing a heat exchanger in the form of a package of sections, each of which is made in the form of a cast-iron rectangular profile closed around the perimeter, hollow inside, with rounded corners. The front section forms the front wall of the boiler and is equipped with three openings, in the upper part of the front section, there is a drain of hot water to the heating system. The rear section performs the function of the rear wall of the boiler and is equipped in the upper part with a chimney pipe, and in its lower part with a pipe for supplying return water to the boiler from the heating system. In turn, the middle sections in an amount equal to 5-11, depending on the capacity of the boiler, are made with three rectangular openings: one lower and two parallel upper ones. Along the contour of the openings of the middle sections, in addition to 1-2 middle sections located next to the rear section, docking ribs are made. The same rib, located at the same level, is equipped with the inside of the front section. When connecting the connecting ribs to each other, the lower openings of the sections form a furnace space, and the upper openings form a convective chimney. Moreover, 1-2 middle sections located next to the rear section are docked between themselves and the rear section with the formation of a gap between the lower and upper openings, which serves to exit the flue gases from the furnace. The convective chimney is made with inserts in the form of steel plates, equipped in turn with turbulators.

The disadvantages of the prototype is the presence of a gap between the lower and upper openings only in the rear of the boiler, which reduces the heat exchange surface area, due to the fact that the space between the front and middle sections, as well as the outer surface of the heat exchanger, are not washed by hot flue gases.

Another disadvantage of the prototype is the difficulty of cleaning the chimney due to the rigid fastening of steel plates in it and the presence of turbulators.

The objective of the utility model is the development of a sectional cast-iron boiler, in which the disadvantages of the analogue and prototype are eliminated.

The technical result is to increase the surface area of heat transfer, the intensification of heat transfer, the intensification of the combustion process, and, consequently, the increase in boiler efficiency.

The technical result is achieved by the fact that in a sectional water boiler containing a heat exchanger in the form of a package of sections, each of which is made in the form of a cast-iron rectangular profile closed around the perimeter, hollow inside, with rounded corners, the sections are interconnected so that the lower openings form a furnace space, and the upper ones are convective flues, according to this utility model, structurally sections are made in such a way that the middle sections are interconnected and with the rear section to form m Between the combustion chamber and the flue gas ducts, which serve for the partial flow of flue gases from the combustion chamber into the flue ducts, between the ribs of which a tape swirler is rigidly fixed, and a collector for flue gas removal is located above the upper surface of the sections.

The essence of the utility model is illustrated in the drawing, in which Fig. 1 shows a sectional boiler (vertical section), Fig. 2. front view of the middle sections,

The numbers in the figures indicate:

1 - front section of the boiler;

2, 2 ', 2' '- bosses;

3 - supply of circulating water;

4 - rear section of the boiler;

5 - chimney;

6 - drainage of hot water;

7 - middle sections of the boiler;

8 - lower opening of the boiler section;

9, 10, 11 - upper openings of the boiler sections;

12 - cracks;

13 - collector;

14 - steel cover;

15 - tape swirler;

16 - cover;

17 - low emission cylindrical burner type Premix.

The sectional boiler according to FIG. 1, 2 contains a packet of sections, each section of the packet is made in the form of a cast-iron rectangular profile closed around the perimeter with rounded corners and hollow inside, the sections are interconnected by bosses 2, 2 ', 2' ', while the front section 1 forms the front wall of the boiler. In the upper part of the front section 1, there is a supply of 3 circulating water from the heating system, the rear section 4 functions as the rear wall of the boiler and is equipped in the upper part with a chimney pipe 5, and in its lower part with a pipe 6 for draining hot water from the boiler to the heating system. The middle sections 7 in an amount equal to at least 2, depending on the power of the boiler, are made with four openings: one lower cylindrical 8 and three parallel upper ones 9, 10, 11, having a rectangular cross-section. The sections are interconnected in such a way that the lower openings 8 form the furnace space, and the upper 9, 10 and 11 - convective flues. Structurally, the sections are made in such a way that the middle sections 7 are interconnected and with the rear section 4 with the formation between the furnace space and the flues 9, 10, 11 of the slots 12, which serve for the partial flow of flue gases from the combustion space into the flues 9, 10, 11, while the side surfaces of the sections forming the slots become a heat exchange surface. Above the upper surface of the sections there is an upper steel cover 14, which forms a collector 13 for exhausting flue gases into the chimney 5 located above the last section, so that the upper part of the water circuit also becomes a heat exchange surface. The ducts formed by the openings 9, 10 and 11 are made with ribs arranged as shown in FIG. 2 to enhance heat transfer. A tape swirler 15 is rigidly fixed between the ribs to give the gases a rotational-translational motion, which also intensifies heat transfer. A cover 16 is mounted to the front wall of the first section, structurally designed in such a way that a cavity is formed in its upper part for transferring flue gases from convective flues formed by openings 9, 10, and 11 to the collector 13. In the cover in the center of the hole 8, a low emission Premix 17 cylindrical burner.

Sectional boiler operates as follows. The circulating water from the heating system is sent to the boiler through a supply 3 located in the front section 1. Water circulation between the sections is carried out through the lugs 2, 2 ', 2' '. Gaseous fuel mixed with air through a low-emission cylindrical burner of the Premix 18 type enters the combustion chamber formed by the openings of 8 sections of the boiler, where flue gases are formed that rise into the convective flues formed by the openings 9, 10, 11 of the boiler sections and heat the water circulating in the cavities of sections 1, 4, 7. Some of the flue gases generated in the furnace space enter the convective flues through slots 12, which helps to reduce inertization by the combustion products of the furnace space and heat transfer surface. Ribs and a tape swirler 16 located in the flues contribute to the intensification of heat transfer and, accordingly, the efficiency of the boiler. Next, the flue gases enter the manifold 13, formed by the space between the upper surface of the package of sections and the steel cover 14. Thus, the upper surface of the sections also becomes a heat exchange surface. Flue gases are discharged through the chimney 15, and hot water through the pipe 6 enters the heating system.

Claims (1)

A sectional hot water boiler containing a heat exchanger in the form of a package of sections, each of which is made in the form of a cast-iron rectangular profile closed around the perimeter, hollow inside, with rounded corners, the sections are interconnected so that the lower openings form the combustion space, and the upper open convective flues characterized in that the sections are designed in such a way that the middle sections are interconnected and with the rear section with the formation of gaps between the furnace space and the flues, I have a partial flow of flue gases from the combustion chamber into the flues, between the ribs of which a tape swirler is rigidly fixed, and a collector for removing flue gases is located above the upper surface of the sections.

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