CN211012505U

CN211012505U - Multi-rod heating furnace is with built-in tail gas recycle device

Info

Publication number: CN211012505U
Application number: CN201921692372.XU
Authority: CN
Inventors: 王远强; 李剑金
Original assignee: Zhaoqing Keda Machinery Manufacturing Co ltd
Current assignee: Zhaoqing Keda Machinery Manufacturing Co ltd
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-07-14
Anticipated expiration: 2029-10-08

Abstract

The utility model discloses a built-in tail gas recycling device for a multi-rod heating furnace, which comprises a tail gas box, a first fan and a second fan; the tail gas box comprises a box body and a surface cover plate; an air inlet is formed in the lower end of the box body, an air outlet is formed in the upper end of the box body, an air dividing plate is vertically arranged on each of two sides in the box body, a smoke tube is further arranged between the two air dividing plates, and a first air partition plate, a second air partition plate and a third air partition plate are further arranged in the box body from bottom to top; this application adopts the air distribution plate, first air partition plate, second air partition plate and third air partition plate to divide the box, install the tobacco pipe in the box of closed, the waste heat of flue gas is discharged through specific route when operation, the waste heat is absorbed by the cold air that the income wind gap was sent into, derive the hot-air by the air outlet again, the hot-air is carried through external fan and is supplied with the combustor as combustion-supporting hot-blast, reach waste heat recovery and use and reduce the fuel of heating furnace, play energy-concerving and environment-protective purpose.

Description

Multi-rod heating furnace is with built-in tail gas recycle device

Technical Field

The utility model particularly relates to a many excellent heating furnaces are with built-in tail gas recycle device.

Background

In the aluminum processing industry, raw material aluminum (aluminum ingots and aluminum bars) is subjected to a heating process before being rolled, and the heating process is finished in a heating furnace. The aluminum bar heating furnace is a heating device which is widely used, the heating furnace provides heat energy through a burner, and the aluminum bar in a hearth is heated through an air duct under the high-pressure air supply of a circulating fan. The heating process is often considered as a pre-procedure of the calendering process, and the final product quality is not affected, so the new design of the heating furnace often considers the improvement of the automation degree or the improvement of the energy-saving performance (such as a full-automatic aluminum rod heating furnace of Chinese patent CN202660891U, and also such as a preheating device of an aluminum rod heating furnace of Chinese patent CN 201062922Y); in practice, however, the heating process performed by the heating furnace does have a significant influence on the product quality, such as eliminating the metal stress of the aluminum bar under certain conditions, making the surface of the aluminum profile brighter, and having better toughness.

At present, an authorized practical patent with application number 201420335782.X discloses an intermediate heating type multi-rod heating furnace, which can make an aluminum rod entering the heating furnace meet specific heating conditions by improving structures of all parts in a hearth, so as to eliminate metal stress of the aluminum rod, finally make the surface of an extruded aluminum profile brighter and have better toughness, but for the heating furnaces, the corresponding problems still exist, for example, ① the heating furnace needs a large amount of fuel when generating heat, the fuel is not sufficiently combusted, and the generated waste gas damages the surrounding environment, ② the heating furnace does not have a built-in tail gas recycling device, the tail gas generated by the heating furnace cannot be recycled, and the waste of a heat source is serious.

Disclosure of Invention

In view of this, the utility model aims at providing an improve waste heat recovery and utilize efficiency and reduce built-in tail gas recycle device for the multi-rod heating furnace that the fuel of heating furnace used, can play energy-concerving and environment-protective purpose.

In order to solve the technical problem, the technical scheme of the utility model is that:

a built-in tail gas recycling device for a multi-rod heating furnace comprises a tail gas box, a first fan and a second fan, wherein the first fan is installed below one side in the tail gas box, and the second fan is arranged above the first fan and fixed to the tail gas box; the tail gas box comprises a box body and a surface cover plate which covers the surface of the box body and is used for prolonging the service life of the box body; the smoke exhaust device is characterized in that an air inlet is formed in the lower end of the box body, an air outlet is formed in the upper end of the box body, two air dividing plates are vertically arranged on two sides in the box body respectively, a smoke tube is further installed between the two air dividing plates, and a first air separating plate, a second air separating plate and a third air separating plate are further arranged in the box body from bottom to top.

Preferably, the interior of the box body is divided into a heat exchange cavity at the middle part and conversion cavities at two ends of the heat exchange cavity and used for circulating flue gas by two air dividing plates.

Preferably, both ends of the air dividing plate are welded and fixed with the box body, the first air dividing plate, the second air dividing plate and the third air dividing plate are welded and fixed with the air dividing plate after penetrating through the air dividing plate, and the extending parts are welded and fixed with the box body.

Preferably, the air distribution plate is provided with a round hole for installing the smoke pipe.

Preferably, the first air partition plate and the third air partition plate are installed on one side of the box body, penetrate through the air dividing plate and then are welded and fixed with the inner wall of the box body, and the second air partition plate is installed on the other side of the box body, penetrate through the air dividing plate and then are welded and fixed with the inner wall of the box body.

Preferably, a sub-air distributing plate is additionally arranged on the inner side of the air distributing plate part with the upward first air partition plate and the inner side of the air distributing plate part with the downward third air partition plate.

The utility model discloses technical effect mainly embodies in following aspect: this application adopts the air distribution plate, first air partition plate, second air partition plate and third air partition plate to divide the box, install the tobacco pipe in the box of closed, the waste heat of flue gas is discharged through specific route when operation, the waste heat is absorbed by the cold air that the income wind gap was sent into, derive the hot-air by the air outlet again, the hot-air is carried through external fan and is supplied with the combustor as combustion-supporting hot-blast, reach waste heat recovery and use and reduce the fuel of heating furnace, play energy-concerving and environment-protective purpose.

Drawings

FIG. 1 is a structural diagram of a built-in tail gas recycling device for a multi-rod heating furnace according to the present invention;

fig. 2 is a cross-sectional view a-a of fig. 1.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings, so that the technical solution of the present invention can be more easily understood and grasped.

In the present embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right side", "left end", "above", "back", "middle", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and 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.

In the present embodiment, if the connection or fixing manner between the components is not specifically described, the connection or fixing manner may be a bolt fixing manner, a pin connecting manner, or the like, which is commonly used in the prior art, and therefore, details thereof are not described in the present embodiment.

Example 1

A built-in tail gas recycling device for a multi-rod heating furnace is shown in figures 1-2 and comprises a tail gas box 1, a first fan 2 arranged below one side in the tail gas box 1, and a second fan 3 arranged above the first fan 2 and fixed on the tail gas box 1;

the tail gas box 1 comprises a box body 11 and a face cover plate 12 which covers the surface of the box body 11 and is used for prolonging the service life of the box body 11; an air inlet 111 is formed in the lower end of the box body 11, an air outlet 112 is formed in the upper end of the box body 11, two air distribution plates 113 are vertically arranged on two sides in the box body 11, a smoke tube 114 is further arranged between the two air distribution plates 113, and a first air separation plate 115, a second air separation plate 116 and a third air separation plate 117 are further arranged in the box body 1 from bottom to top. The inside of the box body 11 is divided into a heat exchange cavity 1131 in the middle part by two air dividing plates 113, and a conversion cavity 1132 which is located at two ends of the heat exchange cavity 1131 and used for circulating flue gas. The air inlet 111 and the air outlet 112 are communicated with a heat exchange cavity 1131 in the box body 11. The both ends and the box 11 welded fastening of minute aerofoil 113, first division of wind board 115, second division of wind board 116 and third division of wind board 117 are with minute aerofoil 113 welded fastening after running through minute aerofoil 113 to the part that extends all with box 11 welded fastening, can make the sealed difficult leakage of heat transfer chamber 1131 and conversion chamber 1132 inside box 11. Divide and be provided with on the aerofoil 113 to the round hole 1133 with installation tobacco pipe 114, can pass the aerofoil 113 back of dividing through round hole 1133 at tobacco pipe 114, carry out welded fastening with dividing aerofoil 113 again, be favorable to improving the sealing performance between heat transfer chamber 1131 and the conversion chamber 1132, prevent that the flue gas from influencing the utilization ratio after the waste heat recovery by conversion chamber 1132 infiltration heat transfer chamber 1131.

First air partition plate 115 and third air partition plate 117 install the one side at box 11, and run through behind the air partition plate 113 and carry out welded fastening with the inner wall of box 11, can make the conversion chamber 1132 on this one side of box 11 divide into three conversion chamber space that the space is little about, that the intermediate space is big, and hold first fan 2 and second fan 3 respectively in the little conversion chamber 1132 in space about, second air partition plate 116 installs the opposite side at box 11, and runs through behind the air partition plate 113 and carry out welded fastening with the inner wall of box 11, can make the conversion chamber 1132 on this one side of box 11 divide into two equal parts for correspond first air partition plate 115, second air partition plate 116 and third air partition plate 117 and divide into the four equal parts that communicate each other with heat transfer chamber 1131, be favorable to the waste heat in the make full use of the flue gas. The inner sides of the upward air distribution plate 113 of the first air distribution plate 115 and the downward air distribution plate 113 of the third air distribution plate 117 are respectively provided with a sub air distribution plate 1134 additionally, so that the sealing performance between the heat exchange cavity 1131 and the conversion cavity 1132 is further improved.

In the present embodiment, the first fan 2 and the second fan 3 are centrifugal fans of T4-72 types.

The working principle is as follows: with reference to fig. 1, during operation, the space for installing the first fan 2 sucks high-temperature air with smoke dust under the action of the first fan 2, the high-temperature air is introduced into the smoke tube 114 and sequentially passes through the heat exchange cavity 1131 partitioned by the first air partition 115, the second air partition 116 and the third air partition 117 to exchange heat, the smoke subjected to heat exchange is discharged through the second fan 3, the cold air introduced from the air inlet 111 absorbs heat and becomes hot air, the hot air is then guided out from the air outlet 112, and the hot air is conveyed to the burner of the heating furnace through the external fan to serve as combustion-supporting hot air, so that the fuel in the furnace can be fully combusted, and the generation of waste gas is reduced.

Of course, the above is only a typical example of the present invention, and besides, the present invention can also have other various specific embodiments, and all technical solutions adopting equivalent replacement or equivalent transformation are all within the scope of the present invention as claimed.

Claims

1. A built-in tail gas recycling device for a multi-rod heating furnace comprises a tail gas box, a first fan and a second fan, wherein the first fan is installed below one side in the tail gas box, and the second fan is arranged above the first fan and fixed to the tail gas box; the method is characterized in that: the tail gas box comprises a box body and a surface cover plate which covers the surface of the box body and is used for prolonging the service life of the box body; the smoke exhaust device is characterized in that an air inlet is formed in the lower end of the box body, an air outlet is formed in the upper end of the box body, two air dividing plates are vertically arranged on two sides in the box body respectively, a smoke tube is further installed between the two air dividing plates, and a first air separating plate, a second air separating plate and a third air separating plate are further arranged in the box body from bottom to top.

2. The built-in tail gas recycling device for the multi-rod heating furnace according to claim 1, characterized in that: the interior of the box body is divided into a heat exchange cavity at the middle part and conversion cavities at two ends of the heat exchange cavity and used for circulating flue gas through the two air distributing plates.

3. The built-in tail gas recycling device for the multi-rod heating furnace according to claim 1, characterized in that: the two ends of the air distribution plate are welded and fixed with the box body, the first air separation plate, the second air separation plate and the third air separation plate are welded and fixed with the air distribution plate after penetrating through the air distribution plate, and the extending parts are welded and fixed with the box body.

4. The built-in tail gas recycling device for the multi-rod heating furnace according to claim 1, characterized in that: and the air distribution plate is provided with a round hole for installing a smoke tube.

5. The built-in tail gas recycling device for the multi-rod heating furnace according to claim 1, characterized in that: the first wind-proof plate and the third wind-proof plate are arranged on one side of the box body and fixedly welded with the inner wall of the box body after penetrating through the wind-proof plate, and the second wind-proof plate is arranged on the other side of the box body and fixedly welded with the inner wall of the box body after penetrating through the wind-proof plate.

6. The built-in tail gas recycling device for the multi-rod heating furnace according to claim 5, characterized in that: and a sub air distribution plate is additionally arranged on the inner side of the air distribution plate part with the upward first air separation plate and the inner side of the air distribution plate part with the downward third air separation plate.