CN218544385U

CN218544385U - Three-return-stroke efficient steam generator

Info

Publication number: CN218544385U
Application number: CN202222391044.4U
Authority: CN
Inventors: 安建坤; 王梦伟; 何勇
Original assignee: Hebei Lanfeng Boiler And Pressure Vessel Manufacturing Co ltd
Current assignee: Hebei Lanfeng Boiler And Pressure Vessel Manufacturing Co ltd
Priority date: 2022-09-08
Filing date: 2022-09-08
Publication date: 2023-02-28
Anticipated expiration: 2032-09-08

Abstract

The utility model relates to a three-pass high-efficiency steam generator, including frame, radiation section, convection section and energy-saving appliance are installed to the frame inside, radiation section and convection section are through flue conduction connection, and convection section and energy-saving appliance are through flue conduction connection, the heat transfer area in energy-saving appliance lower part communicates with the feed pipe, the top of the heat transfer area in energy-saving appliance upper portion communicates with one end of outlet pipe, the import and the outlet pipe of convection section communicate, the convection section export all with the radiation section intercommunication; by adopting the three-return-stroke efficient steam generator with the structure, the flue gas and the water can exchange heat in three return strokes, so that the utilization rate of the flue gas waste heat is improved, and the heat exchange efficiency of the steam generator is improved.

Description

Three-return-stroke efficient steam generator

Technical Field

The utility model relates to a boiler technical field especially relates to a three return stroke high efficiency steam generator.

Background

A steam generator, commonly called a boiler, is an energy conversion device that converts chemical energy in fuel into heat energy through combustion, so that the boiler outputs steam with a certain amount of heat energy.

The high-temperature flue gas recovery rate that current steam generator produced is lower, leads to steam generator's heat exchange efficiency lower, wastes valuable fuel resource.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem lie in providing a high-efficient steam generator of three return strokes, the flue gas can carry out the heat transfer of three return strokes with water, has improved the utilization ratio of flue gas waste heat to steam generator's heat exchange efficiency has been improved.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a three-pass high-efficiency steam generator comprises a frame, a radiation section, a convection section and an energy saver, wherein the radiation section, the convection section and the energy saver are arranged in the frame, the radiation section and the convection section are in conduction connection through a flue, and the convection section and the energy saver are in conduction connection through the flue;

the heat exchange zone at the lower part of the energy saver is communicated with a water supply pipe, and the top end of the heat exchange zone at the upper part of the energy saver is communicated with one end of a water outlet pipe;

the inlet of the convection section is communicated with the water outlet pipe, and the outlet of the convection section is communicated with the radiation section.

Preferably, the outlet of the radiation section is communicated with a gas collecting pipe through a rising pipe, and the gas collecting pipe is provided with a steam outlet and a safety valve.

Preferably, the radiation section comprises a radiation upper header, a radiation lower header and a water wall tube arranged between the radiation upper header and the radiation lower header, and the water wall tube is of a membrane wall structure.

Preferably, the convection section comprises a convection lower header, a convection upper header and a convection pipe arranged between the convection lower header and the convection upper header, the convection upper header is communicated with the radiation lower header through a communicating pipe, and the convection lower header is communicated with a water outlet pipe of the economizer.

Preferably, the energy saver is internally provided with a smoke tube bundle, one end of the smoke tube bundle is communicated with the smoke outlet, the other end of the smoke tube bundle is communicated with the convection section through a smoke flue, the smoke tube bundle comprises a plurality of smoke tubes, and the smoke tubes are threaded smoke tubes.

Preferably, the radiation upper header is communicated with one end of a water level gauge, and the other end of the water level gauge is communicated with the radiation lower header.

Preferably, the convection upper header is communicated with one end of the liquid level meter, and the other end of the liquid level meter is communicated with the convection lower header.

Preferably, the bottoms of the convection lower header and the radiation lower header are respectively provided with a first sewage discharge pipe, and the bottom of the energy saver is provided with a second sewage discharge pipe.

The utility model has the advantages that: by adopting the three-return-stroke high-efficiency steam generator with the structure, the flue gas and the water can exchange heat in three return strokes, so that the utilization rate of the flue gas waste heat is improved, and the heat exchange efficiency of the steam generator is improved.

Drawings

FIG. 1 is an overall side view of the present invention;

fig. 2 is an overall front view of the present invention.

Illustration of the drawings:

1. a steam outlet; 2. a gas collecting pipe; 3. a riser pipe; 4. radiating an upper header; 5. a radiation section; 6. a communicating pipe; 7. a water wall tube; 8. a water level gauge; 9. a first drain pipe; 10. the convection current flows down the header; 11. a convection tube; 12. a convection section; 13. a liquid level meter; 14. convection upper header; 15. a second sewage draining pipe; 16. a water supply pipe; 17. an energy saver; 18. a smoke pipe; 19. a water outlet pipe; 20. a flue gas outlet; 21. and (5) radiating a lower header.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Specific examples are given below.

Referring to fig. 1 and 2, a three-pass high-efficiency steam generator comprises a frame, a radiation section 5, a convection section 12 and an economizer 17, wherein the radiation section 5, the convection section 12 and the economizer 17 are installed inside the frame, the radiation section 5 and the convection section 12 are in conduction connection through a flue, and the convection section 12 is in conduction connection with the economizer 17 through the flue, wherein front and rear cover plates of the economizer 17 are detachable so as to remove soot deposited on a smoke tube 18, the radiation section 5 comprises a radiation upper header 4, a radiation lower header 21 and a water wall tube 7 arranged between the radiation upper header 4 and the radiation lower header 21, the water wall tube 7 is of a membrane wall structure, the water wall tube 7 directly receives flame radiation of a burner, the radiation upper header 4 is communicated with one end of a water level gauge 8, the other end of the water level gauge 8 is communicated with the radiation lower header 21, the convection section 12 comprises a convection upper header 10, a convection upper header 14, a convection tube 11 arranged between the convection upper header 10 and the convection upper header 14, the water level 14 is communicated with the convection lower header 21 through a communication pipe 6, the water level of the radiation lower header 21 is communicated with a first header 10, and a drain pipe 13 of the convection lower header 13, and a drain pipe 13 communicated with the first drain pipe of the convection header 10;

the outlet of the radiation section 5 is communicated with a gas collecting pipe 2 through an ascending pipe 3, a steam outlet 1 and a safety valve are arranged on the gas collecting pipe 2, the inlet of the convection section 12 is communicated with a water outlet pipe 19, and the outlets of the convection section 12 are communicated with the radiation section 5;

the heat exchange zone at the lower part of the energy saver 17 is communicated with the water supply pipe 16, the top end of the heat exchange zone at the upper part of the energy saver 17 is communicated with one end of the water outlet pipe 19, a smoke tube bundle is arranged inside the energy saver 17, one end of the smoke tube bundle is communicated with the smoke outlet 20, the other end of the smoke tube bundle is communicated with the convection section 12 through a flue, the smoke tube bundle comprises a plurality of smoke tubes 18, the smoke tubes 18 are threaded smoke tubes, the threaded smoke tubes can strengthen heat transfer, the heat transfer coefficient is increased, the heat loss is reduced, the heat efficiency is improved, meanwhile, the stress generated by thermal expansion can be effectively reduced, and the second blow-off pipe 15 is arranged at the bottom of the energy saver 17.

The flame sprayed by the burner is directly combusted in the radiation section 5, the water wall tube 7 directly absorbs heat by the flame radiation as a first return stroke, the flue gas generated by the burner enters the convection section 12 through the flue, the convection tube 11 of the convection section 12 carries out convection heat exchange with the flue gas as a second stroke, the flue gas enters the smoke tube bundle of the energy saver 17 through the flue to carry out heat exchange as a 3 rd stroke, and finally the flue gas is discharged from the flue gas outlet 20;

the waterway stroke is as follows: water is injected from a water supply pipe 16 of the energy saver 17, enters the energy saver 17, then enters the convection pipe 11 through a water outlet pipe 19, then enters the radiation section 5 through the communicating pipe 6 respectively, saturated steam is formed in the radiation section, and finally, the saturated steam is discharged through the ascending pipe 3, the gas collecting pipe 2 and the steam outlet 1 in sequence.

The utility model adopts the above structure three return stroke high efficiency steam generator, the flue gas can carry out the heat transfer of three return strokes with water, has improved the utilization ratio of flue gas waste heat to steam generator's heat exchange efficiency has been improved.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The three-pass efficient steam generator is characterized by comprising a frame, a radiation section (5), a convection section (12) and an economizer (17), wherein the radiation section (5), the convection section (12) and the economizer (17) are installed inside the frame, the radiation section (5) and the convection section (12) are in conduction connection through a flue, and the convection section (12) and the economizer (17) are in conduction connection through the flue;

the heat exchange zone at the lower part of the energy saver (17) is communicated with a water supply pipe (16), and the top end of the heat exchange zone at the upper part of the energy saver (17) is communicated with one end of a water outlet pipe (19);

the inlet of the convection section (12) is communicated with the water outlet pipe (19), and the outlet of the convection section (12) is communicated with the radiation section (5).

2. A three-pass high-efficiency steam generator according to claim 1, characterized in that the outlet of the radiant section (5) is communicated with the gas collecting pipe (2) through the ascending pipe (3), and the gas collecting pipe (2) is provided with a steam outlet (1) and a safety valve.

3. A triple-pass high efficiency steam generator according to claim 1 wherein the radiant section (5) comprises a radiant upper header (4), a radiant lower header (21) and water wall tubes (7) disposed between the radiant upper header (4) and the radiant lower header (21), and the water wall tubes (7) are of membrane wall construction.

4. A three-pass high efficiency steam generator according to claim 3 wherein the convection section (12) comprises a convection lower header (10), a convection upper header (14) and convection tubes (11) arranged between the convection lower header (10) and the convection upper header (14), the convection upper header (14) is communicated with the radiation lower header (21) through a communicating tube (6), and the convection lower header (10) is communicated with the water outlet tube (19) of the economizer (17).

5. A three-pass high efficiency steam generator according to claim 1, characterized in that the economizer (17) has a flue bundle arranged therein, one end of the flue bundle is connected to the flue gas outlet (20), and the other end of the flue bundle is connected to the convection section (12) through the flue, the flue bundle comprises a plurality of flue tubes (18), and the flue tubes (18) are twisted flue tubes.

6. A triple-pass high efficiency steam generator according to claim 3 wherein the upper radiation header (4) communicates with one end of a level gauge (8) and the other end of the level gauge (8) communicates with the lower radiation header (21).

7. A triple-pass high efficiency steam generator according to claim 4 wherein the convection upper header (14) communicates with one end of a level gauge (13) and the other end of the level gauge (13) communicates with the convection lower header (10).

8. The steam generator with three return strokes and high efficiency as claimed in claim 4 is characterized in that the bottoms of the convection lower header (10) and the radiation lower header (21) are respectively provided with a first drain pipe (9), and the bottom of the economizer (17) is provided with a second drain pipe (15).