CN218565397U

CN218565397U - Single-return-stroke water pipe steam boiler structure

Info

Publication number: CN218565397U
Application number: CN202222839385.3U
Authority: CN
Inventors: 吴艳丽; 迪金强; 何帅; 张国军
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 steam boiler structure comprises a membrane wall hearth, an upper boiler barrel and a lower boiler barrel, wherein an upper collecting box is arranged above the hearth, a lower collecting box is arranged below the hearth, 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, the rear end of the upper collecting box is connected with the upper boiler barrel, the rear end of the lower collecting box is connected with the lower boiler barrel, one end of a steam-water outlet pipe is connected with the front end, close to the upper collecting box, of the other end of the steam-water outlet pipe is connected with the upper boiler barrel, a steam outlet is positioned on the upper boiler barrel, steam-homogenizing hole plates are fixedly arranged on two sides below the steam outlet, a corrugated plate separator is arranged on the outer side of each steam-homogenizing hole plate, a lower water-discharging hole plate is fixedly arranged on the lower portion inside the upper boiler barrel, a water inlet pipe extends into the upper boiler barrel, the lower end of the lower water-discharging hole plate is positioned in the upper boiler barrel, and an energy saver and a condenser are sequentially arranged behind a convection heat exchange chamber. The boiler volume and the steel consumption of the steam boiler can be obviously reduced.

Description

Single-return-stroke water pipe steam boiler structure

Technical Field

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

Background

At present, the environmental requirements are becoming stricter, small steam boilers gradually develop from distributed steam supply to large-scale boilers in a centralized steam supply direction, for example, concentrated steam supply is adopted in many industrial parks at present, which also generates the demand for large-scale steam boilers, most of the common oil-gas-fired large-scale water-tube steam boilers in the market are traditional SZS-type water-tube boilers, and the structures of the boilers are as in chinese patent application No. 2011057113981 (an SZS-type boiler with water-cooling jackets for front and rear walls of a hearth) and chinese patent application No. 2021225762461 (a hearth of an SZS-fired natural gas steam boiler), the hearth is at one side, the upper and lower part of the hearth side is installed at the upper and lower part, convection tube bundles are connected between the upper and lower hearths, and the flue gas passes through more than two return strokes, which causes large operating resistance of the boiler, the hearth back and high energy consumption, and the hearth width is too large for the whole hearth to be transported to the field, and the large operation amount is caused by the fact that the large-scale boiler needs to be shipped to the field by using scattered parts to be installed to the field.

Disclosure of Invention

An object of the utility model is to overcome the above-mentioned problem that exists in present water pipe steam boiler, provide a single return stroke water pipe steam boiler structure.

In order to realize the purpose of the utility model, the following technical proposal is adopted: a single-return-stroke water pipe steam boiler structure comprises a film-wall hearth, an upper boiler barrel and a lower boiler barrel, wherein a convection pipe bundle is installed between the upper boiler barrel and the lower boiler barrel, a convection heat exchange chamber is formed at the position of the convection pipe bundle, an upper collecting box is arranged above the hearth, a lower collecting box is arranged below the hearth, the upper end of a film-wall is connected with the upper collecting box, the lower end of the film-wall is connected with the lower collecting box, the rear end of the upper collecting box is connected with the upper boiler barrel, the rear end of the lower collecting box is connected with the lower boiler barrel, the axial direction of the upper boiler barrel and the lower boiler barrel is the left-right direction, one end of a steam-water outlet pipe is connected with the front end of the upper collecting box, the other end of the steam-water outlet pipe is connected with the upper boiler barrel, a steam outlet is located on the upper boiler barrel, steam-even pore plates are fixedly installed on two sides below the steam outlet, a corrugated pore plate is installed on the outer side of the steam-even pore plate, a lower pore plate is fixedly installed on the inner portion of the upper boiler barrel, a water inlet pipe extends into the upper boiler barrel, the lower end of the upper boiler barrel is located at the lower pore plate, an energy saver is sequentially installed behind the convection chamber, and connected with the water inlet pipe.

Further, the method comprises the following steps of; the upper header is connected to the lower half part of the upper boiler barrel, and the steam-water outlet pipe is connected to the upper half part of the upper boiler barrel.

Further, the method comprises the following steps of; the convection bank is a spiral finned tube.

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

The utility model discloses an actively beneficial technological effect lies in: compared with a steam boiler with an SZS structure, the steam boiler has the advantages that the steam boiler adopts a single-return structure, the resistance is small when smoke flows, the convection bank adopts the spiral finned tube, the heat exchange efficiency is high, the effect is good, the back pressure of a corresponding hearth is low, the required fan power is small, the width of a boiler body is narrower than that of the traditional SZS structure, the boiler can be transported to a site in large pieces, the work load of site operation is reduced, and the volume and the steel consumption of the boiler with the structure can be obviously reduced.

Drawings

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

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

Fig. 3 is a schematic view of the inside of the upper drum.

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 refer to: 1, a hearth; 2: an upper header; 3: a lower header; 4: putting the boiler barrel on the boiler; 5: discharging the boiler barrel; 6: a convection bank; 7: a water vapor outlet pipe; 8: a steam outlet; 9: a water inlet pipe; 10: an energy saver; 11: a condenser; 12: a membrane wall; 13: a steam-homogenizing pore plate; 14: a corrugated plate separator; 15: a lower water hole plate.

As shown in the attached drawing, the single-return water pipe steam boiler structure comprises a membrane wall hearth, an upper boiler barrel and a lower boiler barrel, wherein the membrane wall hearth means that the side wall and the front wall of the hearth are membrane walls, 12 is the membrane wall, an upper header 2 is arranged above the hearth, a lower header 3 is arranged below the hearth, and the upper end and the lower end of the membrane wall are connected (communicated) with the upper header and the lower header.

A convection bank 6 is arranged between an upper boiler barrel 4 and a lower boiler barrel 5, the convection bank is a spiral finned tube, a convection heat exchange chamber is formed at the convection bank, the convection heat exchange chamber also adopts a membrane wall, the upper end of the membrane wall is connected (communicated with the upper boiler barrel), the lower end of the membrane wall is connected (communicated) with the lower boiler barrel, the rear end of an upper header 2 is connected (communicated) with the upper boiler barrel 4, the upper header is connected with the lower half part of the upper boiler barrel, the rear end of a lower header 3 is connected with the lower boiler barrel 5, the axial directions of the upper boiler barrel and the lower boiler barrel are the left-right direction, one end of a steam water outlet pipe 7 is connected (communicated) with the front end close to the upper header, the other end of the steam water outlet pipe is connected and communicated with the upper boiler barrel 4, the steam water outlet pipe is connected with the upper half part of the upper boiler barrel, a steam outlet 8 is positioned on the upper boiler barrel, and both sides below the steam outlet are fixedly provided with steam uniform hole plates 13, wave plate separator 14 is installed in the outside of even vapour orifice plate, lower part fixed mounting has lower orifice plate 15 in last boiler drum, install inlet tube 9 on last boiler drum, inlet tube 9 stretches into lower extreme position in last boiler drum lower extreme and goes down orifice plate department, install economizer 10 after convection heat transfer room in proper order, condenser 11, the economizer, the condenser all is the configuration on the current boiler, the rivers in economizer, the condenser are to opposite with the flue gas flow direction, the inlet tube 9 of economizer is connected to the play water of economizer, the water tank is connected to the intaking of economizer, the water tank is all connected to the water of intaking of condenser, through the water heating of condenser circulation in to the water tank, furnace, convection heat transfer room, economizer, condenser coaxial.

The boiler hearth of the steam boiler consists of an upper collecting box, a lower collecting box, a left membrane wall, a right membrane wall, a front membrane wall and a convection zone, wherein the convection zone consists of an upper boiler barrel, a lower boiler barrel, a convection tube bundle and the membrane walls which are transversely arranged, the upper collecting box and the lower collecting box of the hearth are respectively communicated with the upper boiler barrel and the lower boiler barrel, and the tail part of the upper collecting box and the lower collecting box of the hearth is connected with an energy saver and a condenser. High-temperature flue gas directly enters a convection area after being combusted in a hearth, enters a tail heating surface (an energy saver and a condenser) after being subjected to heat exchange by a scouring convection tube bundle, and is discharged after the heat exchange with the energy saver and the condenser tube bundle is finished. Boiler inlet water enters the boiler after being subjected to heat exchange through the energy saver, then enters the lower drum through the natural circulation of the convection bank, the lower collection box of the hearth is communicated with the lower drum, a steam-water mixture formed after heat absorption of the membrane wall of the hearth rises to enter the upper collection box of the hearth, then is guided to the convection upper drum through the steam-water outlet pipe, is separated through the separator in the upper drum, and finally is discharged from the main steam port.

The following table compares a 10 ton water tube steam boiler using this construction to a conventional SZS water tube steam boiler:

after the embodiments of the present invention have been described in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above claims, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the technical solution of the present invention, and the present invention is not limited to the embodiments of the examples given in the specification.

Claims

1. The utility model provides a single return stroke water pipe steam boiler structure, includes diaphragm type wall furnace, goes up boiler barrel, lower boiler barrel, goes up the boiler barrel and installs convection bank between the boiler barrel down, and convection bank department forms convection current heat transfer room, its characterized in that: an upper collecting box is arranged above a hearth, a lower collecting box is arranged below the hearth, 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, the rear end of the upper collecting box is connected with an upper boiler barrel, the rear end of the lower collecting box is connected with a lower boiler barrel, the axial directions of the upper boiler barrel and the lower boiler barrel are the left-right direction, one end of a steam-water outlet pipe is connected with the front end of the upper collecting box, the other end of the steam-water outlet pipe is connected with the upper boiler barrel, a steam outlet is positioned on the upper boiler barrel, steam-homogenizing pore plates are fixedly arranged on two sides below the steam outlet, a corrugated plate separator is arranged on the outer side of each steam-homogenizing pore plate, a lower water-draining pore plate is fixedly arranged on the lower portion inside the upper boiler barrel, a water inlet pipe is arranged on the upper boiler barrel, the lower end inside the upper boiler barrel extends into the lower water-draining pore plate, an energy saver and a condenser are sequentially arranged behind a convection heat exchange chamber, and the water outlet of the energy saver is connected with the water inlet pipe of the upper boiler barrel.

2. The single-pass water pipe steam boiler structure according to claim 1, wherein: the upper header is connected with the lower half part of the upper boiler barrel, and the steam-water eduction tube is connected with the upper half part of the upper boiler barrel.

3. The single-pass water pipe steam boiler structure according to claim 1, wherein: the convection bank is a spiral finned tube.

4. The single-pass water pipe steam boiler structure according to claim 1, wherein: the hearth, the convection heat exchange chamber, the energy saver and the condenser are coaxial.