CN212178840U - Horizontal full premix burning single return steam boiler - Google Patents
Horizontal full premix burning single return steam boiler Download PDFInfo
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- CN212178840U CN212178840U CN202020548491.4U CN202020548491U CN212178840U CN 212178840 U CN212178840 U CN 212178840U CN 202020548491 U CN202020548491 U CN 202020548491U CN 212178840 U CN212178840 U CN 212178840U
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Abstract
The utility model provides a horizontal full premix burning single return steam boiler, includes the combustor, is connected with the wind channel on the combustor, and wind channel end connection is on the fan, is connected with the gas inlet pipe mouth on the wind channel, and the combustor is located stove courage front portion, and the rear portion of stove courage is connected with many tobacco pipes, and the fan is fixed to be set up at the boiler top, and the burning is the plane burner, and the tobacco pipe is the single return, and the tobacco pipe adopts feather wing pipe, and the rear end of tobacco pipe is connected on a two-stage heat exchanger, two-stage heat exchanger include a heat transfer cavity, at the internal fixed baffle that is provided with of heat transfer cavity, has the clearance between the top of baffle and heat transfer cavity, has put multichannel heat transfer water pipe in the both sides equipartition of baffle, and one side of baffle is the one-level heat exchanger, and. The utility model discloses simple structure, the cost of manufacture is low.
Description
Technical Field
The utility model relates to a steam boiler, in particular to full premix steam boiler belongs to heat exchanger technical field.
Background
With the continuous development of boiler technology, low pollution and high efficiency become the goals pursued in the industry. Most of the existing gas-fired steam boilers adopt a traditional three-return (or two-return) flue gas structure, including a corrugated furnace pipe, a return combustion chamber, a threaded smoke pipe and the like, and have the disadvantages of complex structure, large volume and high production cost. Most products use the FGR flue gas recirculation technology, and the effect of low NOx emission is realized by matching with a low-nitrogen combustor and a large hearth. The enlargement of the hearth causes the increase of the boiler volume and the increase of steel consumption, and simultaneously the occupation area is correspondingly increased. The FGR technique also causes problems of reduced boiler efficiency, difficulty in handling the flue gas recirculation pipeline condensate, and the like. In order to improve the efficiency of the boiler and fully utilize the waste heat of the flue gas, most of the steam boilers are provided with an economizer and a condenser at the same time. Usually, the flue gas flows out of a third return (or second return) flue pipe of the furnace body, enters a transfer flue, and then flows horizontally through an economizer and a condenser in turn. The transfer ducts, economizer and condenser are usually arranged end to end in a straight line. The arrangement mode occupies a large space and has high requirement on the space of a boiler room. And most products need to assemble the components such as the furnace body, the rotary flue, the energy saver, the condenser and the like on the installation site of a user, so that the installation cost is higher.
Disclosure of Invention
The utility model aims to overcome the relevant problems of bulky, low heat exchange efficiency, heavy weight and the like of the existing steam boiler, and provide a horizontal full premix combustion single-return steam boiler.
In order to realize the purpose of the utility model, the following technical proposal is adopted: a horizontal full-premix combustion single-return steam boiler comprises a burner, wherein the burner is connected with an air channel, the end part of the air channel is connected with a fan, the air channel is connected with a gas inlet pipe orifice, the burner is positioned at the front part of a furnace liner, the rear part of the furnace liner is connected with a plurality of smoke pipes, the fan is fixedly arranged at the top of the boiler, the combustion is a plane burner, the smoke tube is a single return stroke, the smoke tube adopts a wing tube, the rear end of the smoke tube is connected with a two-stage heat exchanger, the two-stage heat exchanger comprises a heat exchange cavity, a clapboard is fixedly arranged in the heat exchange cavity, a gap is arranged between the clapboard and the top of the heat exchange cavity, the gap forms a flue gas channel, a plurality of heat exchange water pipes are uniformly distributed on two sides of the partition plate, one side of the partition plate is a primary heat exchanger, the other side of the partition plate is a secondary heat exchanger, an inlet of flue gas is located below the heat exchange water pipes of the primary heat exchanger, and a flue gas outlet is formed in the lower portion of the side face of the secondary heat exchanger.
Further, the method comprises the following steps of; the front surfaces of the first-stage heat exchanger and the second-stage heat exchanger are respectively provided with a water inlet header and a water outlet header, the water inlet end of the heat exchange water pipe is connected to the water inlet header, the water outlet end of the heat exchange water pipe is connected to the water outlet header, and the header above the water outlet end of the heat exchange water pipe is connected with an exhaust connecting pipe.
Further, the method comprises the following steps of; the two side walls of the partition board are fixedly connected with a plurality of baffle plates which are distributed up and down, and the inner walls of the first-stage heat exchanger and the second-stage heat exchanger which are opposite to the partition board are also fixedly connected with a plurality of baffle plates which are distributed up and down.
Further, the method comprises the following steps of; the top of the heat exchange cavity is provided with an inspection opening, and an upper cover is arranged on the inspection opening in a matching manner.
Further, the method comprises the following steps of; the heat exchange water pipe adopts a steel-aluminum composite spiral finned pipe.
The utility model discloses an actively beneficial technological effect lies in: the smoke single-return structure is adopted, the structure is simple, and the manufacturing cost is low; by adopting full-premixing planar combustion, the required combustion space is smaller, and the NOx emission is lower than 30 mg/Nm; the fan is arranged at the top of the boiler body and sucks air with higher temperature at the high part of the boiler room, which is beneficial to the boiler efficiency. The smoke tube adopts a wing tube to strengthen heat transfer; the energy saver and the condenser are integrated into a two-stage heat exchanger, the heat exchange water pipe adopts the steel-aluminum composite spiral finned tube, and the heat exchange area is sufficient, the efficiency is high, and the size is small; the energy saver, the condenser and the furnace body are integrally arranged, and the field installation is convenient. Small volume, small occupied area and high starting speed (small water volume).
Drawings
FIG. 1 is an overall schematic view of the present boiler.
Fig. 2 is a schematic plan view of a two-stage heat exchanger.
Fig. 3 is a perspective schematic view of a two-stage heat exchanger.
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 fan; 2, an air duct; 3, a gas inlet pipe orifice; 4: a planar burner; 5: a furnace pipe; 6: a smoke pipe; 7: a secondary heat exchanger; 8: a heat exchange cavity; 9: a partition plate; 10: a gap; 11: a heat exchange water pipe; 12: a flue gas outlet; 13: a baffle plate; 14: an upper cover; 15: a water inlet header; 16: a water outlet header; 17: an exhaust connecting pipe.
As shown in the attached drawings, the horizontal type full-premixing combustion single-return steam boiler comprises a combustor, wherein an air duct 2 is connected to the combustor, the end of the air duct is connected to a fan 1, a fuel gas inlet pipe opening 3 is connected to the air duct, the combustor is located at the front part of a furnace liner 5, a plurality of smoke pipes 6 are connected to the rear part of the furnace liner, the fan 1 is fixedly arranged at the top of the boiler, combustion is a planar combustor 4, the planar combustor can be obtained through the market, the smoke pipes are in single return, the smoke pipes are wing pipes, the wing pipes can adopt the scheme disclosed by the applicant in application numbers 2018219275391, 201821927284.9 and 201821927283.4, and the rear end of each smoke pipe is connected to a two-stage heat exchanger 7.
The two-stage heat exchanger include a heat transfer cavity 8, heat transfer cavity top seted up the inspection mouth, the cooperation is provided with upper cover 14 on the inspection mouth, at the internal fixed baffle 9 that is provided with of heat transfer cavity, clearance 10 has between the top of baffle and heat transfer cavity, the clearance forms flue gas passageway, the equal fixedly connected with polylith baffle that distributes from top to bottom of baffle both sides wall, also the polylith baffle that distributes from top to bottom of fixedly connected with on the inner wall of the one-level heat exchanger relative with the baffle and second grade heat exchanger, the baffle can prevent that the flue gas from flowing along the inner wall, increases heat exchange efficiency. A plurality of heat exchange water pipes 11 are uniformly arranged on two sides of the partition board, and the heat exchange water pipes adopt steel-aluminum composite spiral finned tubes. One side of the partition board is provided with a first-stage heat exchanger, the other side of the partition board is provided with a second-stage heat exchanger, the outlet of the smoke tube is positioned below the heat exchange water pipe of the first-stage heat exchanger, and the lower part of the side surface of the second-stage heat exchanger is provided with a smoke outlet 12. The front surfaces of the first-stage heat exchanger and the second-stage heat exchanger are respectively provided with a water inlet header and a water outlet header, the water inlet end of the heat exchange water pipe is connected with the water inlet header, the water outlet end of the heat exchange water pipe is connected with the water outlet header, the header positioned above the water inlet header is connected with an exhaust connecting pipe, and the water inlet header shown by 15, the water outlet header shown by 16 and the exhaust connecting pipe shown by 17 in the figure are all arranged on the second-stage heat exchanger. The fan 1 is arranged above the pot shell 7. The water inlet header of the primary heat exchanger is positioned at the upper part, and the water outlet header is positioned at the lower part.
When the boiler works, combustion-supporting air is blown out by the fan and enters the air duct, natural gas entering the air duct from the combustion-supporting air is uniformly mixed according to a certain proportion and then flows into the planar metal fiber combustion head, and the natural gas is combusted on the surface of the planar metal fiber combustion head 4 to generate flue gas. The flue gas enters a flue pipe after heat exchange in the furnace pipe 5, and the flue gas flows out of the flue pipe 6 and then upwards enters a primary heat exchanger; . The top of the first-stage heat exchanger turns downwards to enter the second-stage heat exchanger, and the heat exchange is carried out between the first-stage heat exchanger and the second-stage heat exchanger and the feed water. Finally, the flue gas is discharged out of the boiler through a flue gas outlet 12 and enters a chimney.
The following table shows the comparison between the boiler of the present invention 2t and a conventional boiler of the same tonnage.
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 (5)
1. The utility model provides a horizontal full premix burning single return steam boiler, includes the combustor, is connected with the wind channel on the combustor, and wind channel end connection is connected with the gas inlet pipe mouth on the wind channel on the fan, and the combustor is located the stove courage front portion, and the rear portion of stove courage is connected with many tobacco pipes, its characterized in that: the fan is fixedly arranged at the top of the boiler, the combustion is a plane burner, the smoke tube is in a single return stroke, the smoke tube adopts a wing tube, the rear end of the smoke tube is connected to a two-stage heat exchanger, the two-stage heat exchanger comprises a heat exchange cavity, a partition plate is fixedly arranged in the heat exchange cavity, a gap is formed between the partition plate and the top of the heat exchange cavity, a smoke channel is formed in the gap, multiple heat exchange water tubes are uniformly arranged on two sides of the partition plate, one side of the partition plate is a one-stage heat exchanger, the other side of the partition plate is a second-stage heat exchanger, the inlet of smoke is positioned below the heat exchange water tubes of the one.
2. The horizontal full premix combustion single-pass steam boiler according to claim 1, wherein: the front surfaces of the first-stage heat exchanger and the second-stage heat exchanger are respectively provided with a water inlet header and a water outlet header, the water inlet end of the heat exchange water pipe is connected to the water inlet header, the water outlet end of the heat exchange water pipe is connected to the water outlet header, and the header above the water outlet end of the heat exchange water pipe is connected with an exhaust connecting pipe.
3. The horizontal full premix combustion single-pass steam boiler according to claim 1, wherein: the two side walls of the partition board are fixedly connected with a plurality of baffle plates which are distributed up and down, and the inner walls of the first-stage heat exchanger and the second-stage heat exchanger which are opposite to the partition board are also fixedly connected with a plurality of baffle plates which are distributed up and down.
4. The horizontal full premix combustion single-pass steam boiler according to claim 1, wherein: the top of the heat exchange cavity is provided with an inspection opening, and an upper cover is arranged on the inspection opening in a matching manner.
5. The horizontal full premix combustion single-pass steam boiler according to claim 1, wherein: the heat exchange water pipe adopts a steel-aluminum composite spiral finned pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020548491.4U CN212178840U (en) | 2020-04-15 | 2020-04-15 | Horizontal full premix burning single return steam boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020548491.4U CN212178840U (en) | 2020-04-15 | 2020-04-15 | Horizontal full premix burning single return steam boiler |
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| CN212178840U true CN212178840U (en) | 2020-12-18 |
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| CN202020548491.4U Active CN212178840U (en) | 2020-04-15 | 2020-04-15 | Horizontal full premix burning single return steam boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112856370A (en) * | 2021-01-18 | 2021-05-28 | 西安交通大学 | Full premix water-cooling combustion's pot type gas boiler |
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2020
- 2020-04-15 CN CN202020548491.4U patent/CN212178840U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112856370A (en) * | 2021-01-18 | 2021-05-28 | 西安交通大学 | Full premix water-cooling combustion's pot type gas boiler |
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Inventor after: Wu Yanli Inventor after: He Shuai Inventor after: Zhang Guojun Inventor after: Yang Jian Inventor after: Xing Guojun Inventor before: Wu Yanli Inventor before: He Shuai Inventor before: Chen Yuanyuan Inventor before: Zhang Guojun Inventor before: Yang Jian Inventor before: Xing Guojun |