CN218565736U

CN218565736U - Single-return-stroke water pipe hot water boiler structure

Info

Publication number: CN218565736U
Application number: CN202222838814.5U
Authority: CN
Inventors: 吴艳丽; 迪金强; 何帅; 张国军; 冷雪; 何雨桐
Original assignee: Fangkuai Boiler Co ltd
Current assignee: Fangkuai Boiler Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-03-03
Anticipated expiration: 2032-10-27

Abstract

A single-return-stroke water pipe hot water boiler structure comprises a hearth, an energy saver, an upper boiler barrel and a lower boiler barrel, wherein the front wall and two side walls of the hearth are membrane type walls, a convection heat exchange chamber is formed between the upper boiler barrel and the lower boiler barrel, an upper collecting box is installed on the upper portion of the hearth, a lower collecting box is installed on the lower portion of the hearth, the upper end of each membrane type wall is connected to the upper collecting box, the lower end of each membrane type wall is connected to the lower collecting box, the upper boiler barrel is positioned behind the upper collecting box and communicated with the upper collecting box, the lower boiler barrel is positioned behind the lower collecting box and communicated with the lower collecting box, the convection heat exchange chamber is connected to the energy saver through a flue, water baffles are installed in the upper boiler barrel, the lower collecting box and the upper collecting box, and the water baffles in the upper boiler barrel are behind the water baffles of the lower boiler barrel and behind the water baffles in the upper collecting box. The boiler volume and the steel consumption of the boiler can be obviously reduced.

Description

Single-return-stroke water pipe hot water boiler structure

Technical Field

The utility model relates to a boiler, in particular to single return stroke water pipe boiler structure of large-tonnage belongs to boiler technical field.

Background

At present, most of heating modes in various cities adopt oil-gas hot water boilers for central heating, so a plurality of large-scale hot water boilers are needed, most of common oil-gas hot water pipe boilers in field markets are traditional SZS type water pipe boilers, the SZS type water pipe boilers are also traditional large-tonnage boilers, the typical main structure of the SZS type water pipe boilers is shown in Chinese patent application number 2017209719476 (an ultralow nitrogen condensation type SZS type gas boiler), the peripheral wall of a hearth adopts a membrane wall, an upper boiler barrel and a lower boiler barrel are arranged above and below one side of the hearth, a convection tube bundle is arranged between the upper boiler barrel and the lower boiler barrel, the boiler forms two return strokes from the hearth to the convection tube bundle, if an energy saver and a condenser are calculated, the smoke flowing resistance of the boiler is large, the hearth is high in back pressure, the required fan power is high, and due to the fact that the D-shaped boiler is large in width, the boiler body can generally only carry out bulk transportation at the field, and the construction amount is large.

Disclosure of Invention

The utility model aims to overcome the problems of the prior large-tonnage hot water boiler and provide a single-return water pipe hot water boiler structure.

In order to realize the purpose of the utility model, the following technical proposal is adopted: a single-return-stroke water pipe hot water boiler structure comprises a hearth, an energy saver, an upper boiler barrel and a lower boiler barrel, wherein the front wall and two side walls of the hearth are membrane type walls, a burner interface is arranged on the hearth, a convection pipe bundle is arranged between the upper boiler barrel and the lower boiler barrel, a convection heat exchange chamber is formed between the upper boiler barrel and the lower boiler barrel, an upper collection box is arranged on the upper portion of the hearth, a lower collection box is arranged on the lower portion of the hearth, the upper end of the membrane type wall is connected to the upper collection box, the lower end of the membrane type wall is connected to the lower collection box, the upper boiler barrel is positioned behind the upper collection box, the upper boiler barrel is communicated with the upper collection box, the lower boiler barrel is communicated with the lower collection box, the convection pipe heat exchange chamber is connected to the energy saver through a flue, the inflow of the energy saver is the inflow of a boiler, the outflow of the energy saver is connected to the inflow of the upper boiler, the hot water comes out from the upper collection box from the front portion of the upper collection box, and the upper boiler barrel, the lower boiler barrel, the upper collection box and the lower boiler barrel are provided with water baffles behind the upper collection box.

Further, the method comprises the following steps of; the hearth, the convection heat exchange chamber and the flue are coaxial.

Further, the method comprises the following steps of; the water baffle in the upper drum is positioned at the rear part of the upper drum in the length direction, and the water baffle in the lower drum is positioned at the front part of the upper drum in the length direction; the water baffle in the lower header is positioned at the rear part of the length direction of the water baffle, and the water baffle in the upper header is positioned at the front part of the length direction of the water baffle.

Further, the method comprises the following steps of; the central line of the upper header coincides with the axial line of the upper drum, and the central line of the lower header coincides with the axial line of the lower drum.

Further, the method comprises the following steps of; the convection bank adopts spiral finned tubes.

The utility model discloses an actively beneficial technological effect lies in: compared with an SZS type water pipe hot water boiler, the boiler adopts a single-return structure, the smoke resistance is small, the back pressure of a hearth is low, the required fan power is small, the width of a boiler body is obviously reduced, the boiler can be transported to the site in large parts, the workload of site operation is reduced, and the volume of the boiler and the steel consumption of the structure can be obviously reduced.

Drawings

Fig. 1 is a schematic side view of the present invention.

Fig. 2 is a schematic front view of the present invention.

Detailed Description

In order to explain the utility model more fully, the utility model provides an implementation example. These examples are merely illustrative of the present invention and do not limit the scope of the present invention.

The invention is explained in further detail with reference to the drawings, in which the reference symbols are: 1: a hearth; 2: an upper header; 3: a lower header; 4: a water outlet; 5: a water baffle D;6: a water baffle C;7: putting the boiler barrel on the boiler; 8: a water baffle A;9: water is fed into the upper boiler barrel; 10: a convection bank; 11: discharging the boiler barrel; 12: a water baffle B;13: a flue; 14: an energy saver; 15: water is fed into the economizer; 16: water outlet of the energy saver; 17: a membrane wall.

As shown in the attached drawings, the structure of the single-return-stroke water pipe hot water boiler comprises a hearth 1, an energy saver 14, an upper barrel 7 and a lower barrel 11, wherein a burner port is arranged on the hearth, the front wall and the two side walls of the hearth are membrane walls 17, an upper header 2 is arranged at the upper part of the hearth, a lower header 3 is arranged at the lower part of the hearth, the upper end of each membrane wall is connected with the upper header, the lower end of each membrane wall is connected with the lower header, a convection tube bundle 10 is arranged between the upper barrel and the lower barrel, the convection tube bundle adopts a spiral finned tube, a convection heat exchange chamber is formed between the upper barrel 7 and the lower barrel 11, the central line of the upper barrel 7 is superposed with the axial line of the upper barrel after the upper barrel 7 is positioned in the upper header, the upper barrel 7 is communicated with the upper header 2, the lower boiler barrel 11 is positioned behind the lower collecting box, the central line of the lower collecting box is superposed with the axis of the lower boiler barrel, the lower boiler barrel 11 is communicated with the lower collecting box 3, the convection tube heat exchange chamber is connected to an energy saver through a flue, the energy saver is the existing configuration on the boiler, a hearth, the convection heat exchange chamber and the flue are coaxial, the water inlet 15 of the energy saver is connected with a water tank, the water outlet 16 of the energy saver is connected to the water inlet 9 on the upper boiler barrel, hot water comes out from the front part of the upper collecting box, 4 is shown as a hot water outlet, water baffles are all arranged in the upper boiler barrel, the lower collecting box and the upper collecting box, and the water baffle in the upper boiler barrel is behind the water baffle of the lower boiler barrel and behind the water baffle in the lower collecting box. The water baffle A in the upper drum is positioned at the rear part of the upper drum in the length direction, and the water baffle B in the lower drum is positioned at the front part of the upper drum in the length direction; the water baffle C in the lower header is positioned at the rear part of the length direction of the water baffle C, and the water baffle D in the upper header is positioned at the front part of the length direction of the water baffle C.

The boiler hearth consists of an upper collecting box, a lower collecting box, a left membrane wall, a right membrane wall and a front membrane wall, a convection area consists of an upper drum, a lower drum, a convection tube bundle and a membrane wall, the upper collecting box and the lower collecting box of the hearth are respectively communicated with the upper drum and the lower drum, and the tail part of the upper collecting box and the lower collecting box of the hearth is connected with an energy saver. High-temperature flue gas directly enters a convection zone after being combusted in a hearth, enters a tail heating surface (an energy saver) after being subjected to heat exchange by a scouring convection tube bundle, and is discharged after the heat exchange with an energy saver tube bundle is completed. Boiler circulating water firstly enters a water inlet of the economizer, enters a water inlet of the convection upper drum through a water outlet of the economizer after heat exchange, passes through a water baffle arranged in the drum to force a circulating water flow channel, and finally flows out from a water outlet on a header on a hearth.

Through rearrangement of the radiation heating surface and the convection heating surface of the boiler, the single-channel design is adopted, the size of the boiler is reduced compared with that of a traditional SZS type water pipe boiler, the width of the boiler body is obviously reduced, and the limit of the transportation size of the large water pipe boiler is broken through. Because it is the design of unique single return stroke structure, consequently also reduced furnace backpressure, reduced air-blower power, saved the power consumption.

The following figure shows a comparison of a 29MW boiler of the present construction with a conventional SZS type water tube boiler:

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Claims

1. the utility model provides a single return stroke water pipe hot water boiler structure, includes furnace, energy-saving appliance, goes up the drum, down the drum, furnace antetheca, both sides wall be the diaphragm type wall, have the combustor interface on the furnace, install convection bank between last drum and lower drum, go up the drum and form convection heat transfer room, its characterized in that between the drum down: the upper part of a hearth is provided with an upper collecting box, the lower part of the hearth is provided with a lower collecting box, the upper end of a membrane wall is connected with the upper collecting box, the lower end of the membrane wall is connected with the lower collecting box, an upper boiler barrel is positioned behind the upper collecting box and is communicated with the upper collecting box, a lower boiler barrel is positioned behind the lower collecting box and is communicated with the lower collecting box, a convection tube heat exchange chamber is connected to an energy saver through a flue, the inlet water of the energy saver is the inlet water of a boiler, the outlet water of the energy saver is connected to the inlet water of an upper boiler barrel, hot water comes out from the upper collecting box close to the front part, water baffles are arranged in the upper boiler barrel, the lower collecting box and the upper collecting box, and the water baffles in the upper boiler barrel are behind the water baffles of the lower boiler barrel and behind the water baffles in the lower collecting box.

2. The single-pass water pipe hot water boiler structure according to claim 1, characterized in that: the hearth, the convection heat exchange chamber and the flue are coaxial.

3. The single-pass water pipe hot water boiler structure according to claim 1, characterized in that: the water baffle in the upper drum is positioned at the rear part of the upper drum in the length direction, and the water baffle in the lower drum is positioned at the front part of the upper drum in the length direction; the water baffle in the lower header is positioned at the rear part of the length direction of the water baffle, and the water baffle in the upper header is positioned at the front part of the length direction of the water baffle.

4. The structure of a single-return water pipe hot-water boiler according to claim 1, characterized in that: the central line of the upper header coincides with the axis of the upper drum, and the central line of the lower header coincides with the axis of the lower drum.

5. The single-pass water pipe hot water boiler structure according to claim 1, characterized in that: the convection bank adopts a spiral finned tube.