CN216977525U

CN216977525U - Square box heating furnace of U-shaped furnace tube based on three-side tube distribution of overhead burner

Info

Publication number: CN216977525U
Application number: CN202220578611.4U
Authority: CN
Inventors: 刘维红; 刘斌; 雷勇; 迟祥; 高良宏
Original assignee: China Chengda Engineering Co Ltd
Current assignee: China Chengda Engineering Co Ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-07-15
Anticipated expiration: 2032-03-15

Abstract

The utility model discloses a square box heating furnace of a U-shaped furnace tube based on three-side tube arrangement of an overhead burner, which comprises the burner, a vertical furnace tube and a horizontal furnace tube, wherein the burner is arranged at the top of a radiation section of the square box heating furnace, the vertical furnace tube is arranged on two side surfaces of the radiation section of the square box heating furnace, the horizontal furnace tube is arranged at the bottom surface of the radiation section of the square box heating furnace, and the vertical furnace tube and the horizontal furnace tube are combined and connected through an elbow to form the U-shaped radiation furnace tube. The U-shaped tube distribution mode not only utilizes two side surfaces of the radiation chamber, but also utilizes the bottom surface of the radiation chamber, improves the utilization efficiency of the hearth, solves the problem of thermal expansion of the radiation furnace tube under the high-temperature operation working condition, and ensures the safe and stable operation of the furnace tube under high temperature. In addition, the arrangement mode of the overhead burners is that flue gas combusted by the burners sweeps across the side wall and the bottom furnace tube from top to bottom, and flows out of the hearth of the radiation section through the flue at the bottom of the furnace after being fully subjected to heat exchange with the furnace tube, so that the side surfaces and the bottom space of the hearth of the radiation section can be distributed with tubes.

Description

Square box heating furnace of U-shaped furnace tube based on three-side tube distribution of overhead burner

Technical Field

The utility model relates to the technical field of tubular heating furnaces, in particular to a square box heating furnace of a U-shaped furnace tube based on three-side tube arrangement of an overhead burner.

Background

The tubular heating furnace is a device for heating process media in a furnace tube by high-temperature flue gas generated by combustion; the tubular heating furnace generally consists of a radiation section and a convection section, wherein the radiation section mainly has a cylindrical and square box shape, the cylindrical radiation section is mainly provided with a furnace tube which is mostly a spiral coil or a vertical straight tube, the tube distribution efficiency is low, and the tubular heating furnace is mainly used for medium and small heating furnaces; the large and medium-sized heating furnace has to adopt a square box-shaped radiation section to arrange more furnace tubes.

Furnace tubes are mostly arranged on the lateral surface of a hearth of a radiation section in a conventional square box-shaped radiation section, a burner is required to be arranged at the bottom of the hearth, and the tubes cannot be distributed in the bottom space; the top is a transition space for leading the radiation section to the convection section, and the pipe distribution can not be carried out. Therefore, the utilization rate of the hearth space is not high, particularly, with the large-scale heating furnace, more and more furnace tubes need to be arranged, the utilization rate of the radiant section hearth needs to be improved urgently, and therefore a new radiant furnace tube distribution structure is needed.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a square box heating furnace of a U-shaped furnace tube based on three-side tube distribution of an overhead burner, which is suitable for the tube distribution design of the conventional or large-scale single-tube group and multi-tube group heating furnace radiation section furnace tubes.

The technical scheme adopted by the utility model is as follows:

the utility model provides a square chest heating furnace of U type boiler tube based on trilateral stringing of overhead combustor, includes combustor, perpendicular boiler tube and horizontal boiler tube, the combustor sets up in square chest heating furnace radiation section top, perpendicular boiler tube sets up in two sides of square chest heating furnace radiation section, horizontal boiler tube sets up in square chest heating furnace radiation section bottom surface, perpendicular boiler tube with horizontal boiler tube passes through elbow built-up connection and forms a U type radiation boiler tube.

Furthermore, the U-shaped radiation furnace tube is integrally hung on the side wall of the radiation section of the square box heating furnace.

Furthermore, the top of the vertical furnace tube is connected with a section of furnace tube extending out of the furnace through a 90-degree elbow and is connected with a pipeline, the cross-over connection between tube rows is realized through a 180-degree elbow, and the U-shaped radiation furnace tube is integrally hung on the side wall of the radiation section of the square box heating furnace through furnace tube brackets arranged at the corresponding positions of the 90-degree elbow and the 180-degree elbow.

Furthermore, the vertical furnace tube and the horizontal furnace tube are provided with a plurality of groups to heat different process media.

Furthermore, the vertical furnace tube and the horizontal furnace tube are combined and connected through 90-degree and 180-degree elbows to form a U-shaped radiation furnace tube.

Furthermore, a flue is arranged at the bottom of the radiation section of the square box heating furnace, and flue gas combusted by the combustor flows out of the hearth of the radiation section of the square box heating furnace through the flue after passing through the vertical furnace tube and the horizontal furnace tube from top to bottom and fully exchanging heat.

The utility model has the beneficial effects that:

1) the space utilization rate of the radiation chamber is greatly improved compared with that of the traditional square box heating furnace, not only two side surfaces of the radiation chamber are utilized, but also the bottom surface of the radiation chamber is utilized, so that the utilization rate of a hearth is improved, the hearth space required by the furnace tube with the same heat exchange area is reduced, the overall size of the heating furnace is reduced, and the occupied area and the project investment of the heating furnace are saved.

2) The U-shaped pipe distribution mode solves the problem of thermal expansion of the radiation furnace pipe under the high-temperature operation working condition, the U shape is a flexible structure, and displacement generated by thermal expansion of the horizontal furnace pipe can be absorbed through micro deformation of all pipe sections forming the U shape; the furnace tube is integrally hung on the side wall, and the furnace tube can freely expand downwards; by adopting the measures, the safe and stable operation of the furnace tube at high temperature is ensured.

3) The U-shaped pipe distribution mode that trilateral was heated adapts to the large-scale development trend of heating furnace, can heat different technology media simultaneously through increasing different collecting pipes, merges the medium that originally needs different heating furnaces heating and heats in a heating furnace to merge several small furnaces into a big furnace, help improving the stove thermal efficiency, make things convenient for the concentrated environmental protection of flue gas to handle, reduce the emission index.

4) The conventional square box-shaped radiation section is mostly provided with a burner at the bottom of a hearth, furnace tubes are arranged on the lateral surface of the hearth of the radiation section, and the bottom space cannot be provided with the tubes; the top of the radiation section is a transition space leading to the convection section, and the tubes cannot be distributed, so that the utilization rate of the hearth space is not high. The arrangement mode of the overhead burner is that flue gas combusted by the burner sweeps the side wall and the bottom furnace tube from top to bottom, and flows out of the hearth of the radiation section through the flue at the bottom of the furnace after fully exchanging heat with the furnace tube, so that the side surface and the bottom space of the hearth of the radiation section can be provided with tubes.

Drawings

FIG. 1 is a front view of a square box heating furnace according to an embodiment of the present invention.

FIG. 2 is a side view of a square box furnace according to an embodiment of the present invention.

FIG. 3 is a plan view of a square box heating furnace according to an embodiment of the present invention.

Reference numerals	Corresponding name
		1	Burner with a burner head
2	Vertical furnace tube
		3	Horizontal furnace tube
4	90-degree elbow
		5	180 degree elbow

Detailed Description

In order to more clearly understand the technical features, objects, and effects of the present invention, specific embodiments of the present invention will now be described. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

As the conventional square box-shaped radiation section is mostly provided with the burner at the bottom of the hearth, furnace tubes are arranged on the lateral surface of the hearth of the radiation section, and the bottom space can not be provided with the tubes; the top of the radiation section is a transition space leading to the convection section, and the tubes cannot be distributed, so that the utilization rate of the hearth space is not high.

As shown in fig. 1-3, the present embodiment provides a square box heating furnace of a U-shaped furnace tube based on three-sided tube distribution of an overhead burner, including a burner 1, a vertical furnace tube 2 and a horizontal furnace tube 3, wherein the burner 1 is disposed at the top of a radiation section of the square box heating furnace, and flue gas combusted by the burner 1 flows out of a radiation section furnace chamber of the square box heating furnace through a furnace bottom flue after passing through the vertical furnace tube 2 and the horizontal furnace tube 3 from top to bottom and fully exchanges heat, so that the side surfaces and the bottom space of the radiation section furnace chamber can be distributed with tubes.

As shown in fig. 2, the vertical furnace tubes 2 are disposed on two side surfaces of the radiation section of the square box heating furnace, the horizontal furnace tubes 3 are disposed on the bottom surface of the radiation section of the square box heating furnace, and the vertical furnace tubes 2 and the horizontal furnace tubes 3 are combined and connected by bends to form a U-shaped radiation furnace tube and are converged in the collecting tube. Specifically, the vertical furnace tube 2 and the horizontal furnace tube 3 are combined and connected through a 90-degree elbow 4 and a 180-degree elbow 5 to form a U-shaped radiation furnace tube. The tube distribution mode not only utilizes two side surfaces of the radiation chamber, but also utilizes the bottom surface of the radiation chamber, thereby greatly improving the utilization efficiency of the hearth, reducing the occupied space of the heating furnace, saving the equipment investment and adapting to the large-scale development trend of the heating furnace; the problem of thermal expansion of the radiation furnace tube under the high-temperature operation condition is solved, and the safe and stable operation of the furnace tube under the high temperature is ensured.

Preferably, the U-shaped radiant furnace tube is integrally hung on the side wall of the radiant section of the square box heating furnace. More preferably, the top of the vertical furnace tube 2 is connected with a section of furnace tube extending out of the furnace through a 90-degree elbow 4 and is connected with a pipeline, the cross-over connection between tube rows is realized through a 180-degree elbow 5, and the U-shaped radiation furnace tube is integrally suspended on the side wall of the radiation section of the square box heating furnace through furnace tube brackets arranged at the corresponding positions of the 90-degree elbow 4 and the 180-degree elbow 5.

Preferably, the vertical furnace tube 2 and the horizontal furnace tube 3 are provided with a plurality of groups for heating different process media, namely, the media which need different heating furnaces to heat originally are combined in one heating furnace to be heated, so that a plurality of small furnaces are combined into one large furnace, the heat efficiency of the furnace is improved, the centralized environment-friendly treatment of smoke is facilitated, and the emission index is reduced.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally placed when the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Claims

1. The utility model provides a square chest heating furnace of U type boiler tube based on trilateral stringing of overhead combustor which characterized in that, includes combustor, perpendicular boiler tube and horizontal boiler tube, the combustor sets up in square chest heating furnace radiation section top, perpendicular boiler tube sets up in two sides of square chest heating furnace radiation section, horizontal boiler tube sets up in square chest heating furnace radiation section bottom surface, perpendicular boiler tube with horizontal boiler tube passes through elbow built-up connection and forms a U type radiation boiler tube.

2. The square box heating furnace of the U-shaped furnace tube based on the overhead burner three-sided tube distribution of claim 1, wherein the U-shaped radiant furnace tube is integrally hung on the side wall of the radiant section of the square box heating furnace.

3. The square box heating furnace of the U-shaped furnace tube based on the overhead burner three-side tube arrangement as claimed in claim 2, wherein the top of the vertical furnace tube is connected with a section of furnace tube extending to the outside of the furnace through a 90 ° elbow and is connected with a pipeline, the bridging between the tube rows is realized through a 180 ° elbow, and the U-shaped radiant furnace tube is integrally hung on the side wall of the radiant section of the square box heating furnace through furnace tube brackets arranged at the corresponding positions of the 90 ° elbow and the 180 ° elbow.

4. The square-box heating furnace of the U-shaped furnace tube based on the overhead burner three-sided tube distribution of claim 1, wherein the vertical furnace tube and the horizontal furnace tube are provided with a plurality of groups for heating different process media.

5. The square-box heating furnace of the U-shaped furnace tube based on the overhead burner three-sided tube distribution of claim 1, wherein the vertical furnace tube and the horizontal furnace tube are combined and connected through 90-degree and 180-degree elbows to form a U-shaped radiant furnace tube.

6. The square-box heating furnace of the U-shaped furnace tube based on the overhead burner three-sided tube arrangement as claimed in any one of claims 1 to 5, wherein a flue is arranged at the bottom of the radiation section of the square-box heating furnace, and flue gas combusted by the burner passes through the vertical furnace tube and the horizontal furnace tube from top to bottom, fully exchanges heat, and then flows out of the hearth of the radiation section of the square-box heating furnace through the flue.