Cylinder type air preheater for heating furnace

Abstract

The utility model relates to the technical field of air preheaters, in particular to a barrel type air preheater for a heating furnace. According to the technical scheme, the device comprises a jacket and a preheating cylinder, a plurality of heat conduction plates are evenly welded to the inner wall of the preheating cylinder, spiral heat conduction pieces and the jacket are welded to the outer surface of the preheating cylinder, the spiral heat conduction pieces are located between the jacket and the preheating cylinder, and an air inlet pipe is fixedly connected to one side of the lower surface of the jacket; an air outlet pipe is fixedly connected to the side, away from the air inlet pipe, of the upper surface of the jacket, a rotating shaft is rotationally installed in the preheating barrel, and a cleaning plate is fixedly installed on the outer surface of the rotating shaft. Smoke dust adhering to the heat conduction plate in the preheating cylinder can be conveniently removed, the heat conduction efficiency of the heat conduction plate is stabilized, and the heat exchange efficiency of air and smoke of the heating furnace is also improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air preheater technical field, concretely is a cylinder type air preheater for heating furnace. BACKGROUND

[0002] The cylinder type air preheater for heating furnace is a heat exchange equipment for heating furnace. It is usually composed of a cylindrical shell and internal heat exchange elements, and uses the flue gas waste heat discharged by the heating furnace to preheat the air entering the heating furnace. Its working principle is to make the flue gas and air flow reversely in the cylinder body, and realize heat transfer through the heat exchange elements, so as to increase the air temperature, reduce the flue gas temperature, improve the thermal efficiency of the heating furnace, achieve the purpose of energy saving, and at the same time, the structure is compact, the occupied space is small, the operation is reliable, and the maintenance is convenient.

[0003] At present, in the process of long-term operation of the cylinder type air preheater for heating furnace, the smoke dust in the flue gas discharged by the heating furnace will adhere to the heat conduction plates inside the preheating cylinder, which will hinder the contact between the flue gas and the heat conduction plates, reduce the heat conduction efficiency of the heat conduction plates, and thus reduce the heat exchange efficiency of the flue gas and the air. Therefore, we propose a cylinder type air preheater for heating furnace. UTILITY MODEL CONTENT

[0004] The utility model discloses a cylinder type air preheater for heating furnace, which has the advantages of being convenient to remove the smoke dust adhered to the heat conduction plates inside the preheating cylinder, stabilizing the heat conduction efficiency of the heat conduction plates, and improving the heat exchange efficiency of the air and the flue gas of the heating furnace. The problem of the cylinder type air preheater for heating furnace in the process of long-term operation is solved, that is, the smoke dust in the flue gas discharged by the heating furnace will adhere to the heat conduction plates inside the preheating cylinder, which will hinder the contact between the flue gas and the heat conduction plates, reduce the heat conduction efficiency of the heat conduction plates, and thus reduce the heat exchange efficiency of the flue gas and the air.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a cylinder type air preheater for heating furnace, comprising a jacket and a preheating cylinder, a plurality of heat conduction plates are uniformly welded on the inner wall of the preheating cylinder, a spiral heat conduction fin and a jacket are welded on the outer surface of the preheating cylinder, and the spiral heat conduction fin is located between the jacket and the preheating cylinder, an air inlet pipe is fixedly connected to one side of the lower surface of the jacket, an air outlet pipe is fixedly connected to the side of the upper surface of the jacket away from the air inlet pipe, a rotating shaft is rotatably installed in the preheating cylinder, and a cleaning plate is fixedly installed on the outer surface of the rotating shaft.

[0006] Preferably, flanges are welded on the upper surface and the lower surface of the preheating cylinder, and the preheating cylinder is connected to the flue gas discharge pipeline of the heating furnace through the flanges and bolts.

[0007] Preferably, a fan blade is fixedly installed on the outer surface of the rotating shaft near the top end position, and the fan blade is driven to rotate by the flue gas flowing in the preheating cylinder, thereby driving the rotating shaft to rotate.

[0008] Preferably, the bottom end of the rotating shaft is fixedly connected with a first bevel gear, a rotating motor is fixedly installed at one side of the outer surface of the preheating cylinder near the lower surface, the output shaft of the rotating motor is fixedly connected with a second bevel gear, and the first bevel gear and the second bevel gear are engaged, so that the second bevel gear is driven to rotate by the rotating motor, and the rotating shaft is driven to rotate by the engaged first bevel gear and second bevel gear.

[0009] Preferably, a protective shell is fixed at the inside of the preheating cylinder near the lower surface, the output shaft of the rotating motor and the rotating shaft all penetrate through the protective shell, and the first bevel gear and the second bevel gear are both located inside the protective shell, so that the protective shell can avoid that the smoke dust in the flue gas adheres to the outer surfaces of the first bevel gear and the second bevel gear, and plays a protective role on the first bevel gear and the second bevel gear, thereby reducing the abrasion of the two.

[0010] Compared with the prior art, the utility model has the advantages of the following:

[0011] The utility model discloses a preheating cylinder, heat conduction plate, jacket, spiral heat conduction sheet, rotating shaft and cleaning plate are set up, reached the effect that the preheating cylinder inside heat conduction plate on the adhesion of soot is removed, the heat conduction efficiency of stable heat conduction plate is also improved, the heat exchange efficiency of air and heating furnace flue gas is improved, the flue gas that heating furnace discharges enters the inside of preheating cylinder and contacts heat conduction plate, and the heat is transferred to preheating cylinder, and air enters the inside of jacket from the air inlet pipe, and the spiral heat conduction sheet makes air spiral flow in the inside of jacket, prolongs the flow path of air in the inside of jacket, and fully contacts with the spiral heat conduction sheet and the outer surface of preheating cylinder, improves the heat exchange efficiency of air, and the rotating shaft drives the rotation of cleaning plate, and the soot adhered to the surface of heat conduction plate is removed by cleaning plate, to ensure the heat conduction efficiency of heat conduction plate.

[0012] The utility model discloses a fan blade, can drive the fan blade rotation with the flue gas flowing in the inside of preheating cylinder, to drive the rotation of rotating shaft.

[0013] The utility model discloses a first bevel gear, second bevel gear and rotating motor are set up, can drive the second bevel gear rotation with the rotating motor, and drive the rotation of rotating shaft with the engaged first bevel gear and second bevel gear.

[0014] The utility model discloses a protective shell, can avoid that the smoke dust in the flue gas adheres to the outer surfaces of the first bevel gear and the second bevel gear, and plays a protective role on the first bevel gear and the second bevel gear, thereby reducing the abrasion of the two. ACCURACY

[0015] Figure 1 It is the three -dimensional structure schematic diagram of the utility model;

[0016] Figure 2The utility model discloses a partial solid section structure schematic diagram of jacket;

[0017] Figure 3 The utility model discloses a partial solid section structure schematic diagram of preheating cylinder;

[0018] Figure 4 The utility model discloses Figure 2 The utility model discloses an enlarged structure schematic diagram of A;

[0019] Figure 5 The utility model discloses a partial solid structure schematic diagram of rotating shaft.

[0020] Reference Signs: 1, air inlet pipe; 2, jacket; 3, preheating cylinder; 4, flange plate; 5, air outlet pipe; 6, rotating motor; 7, spiral heat conduction sheet; 8, rotating shaft; 9, heat conduction plate; 10, first bevel gear; 11, protective shell; 12, second bevel gear; 13, fan blade; 14, cleaning plate. Specific implementation

[0021] The technical scheme of the utility model will be further explained below in connection with the drawings and specific embodiments. Embodiment one

[0022] For example Figure 1 , Figure 2 , Figure 3 and Figure 5As shown in the utility model discloses a kind of heating furnace with cylinder air preheater, including jacket 2 and preheating cylinder 3, preheating cylinder 3 is penetrated from top to bottom, and is metal heat conduction material quality, heating furnace discharges flue gas into preheating cylinder 3 inside and flows, preheating cylinder 3 inner wall evenly welds with several heat conduction plates 9, several heat conduction plates 9 are equally divided into several groups, and several heat conduction plates 9 in each group are annular array equidistant fixed installation in preheating cylinder 3 inside, several groups of heat conduction plates 9 are equidistant distribution from top to bottom on preheating cylinder 3 inner wall, and heat conduction plate 9 in upper and lower adjacent two groups is mutually staggered, to make flue gas bend flow in preheating cylinder 3 inside, extend the flow distance of flue gas in preheating cylinder 3 inside, also make flue gas and heat conduction plate 9 that flow in preheating cylinder 3 inside fully contact, to improve the heat exchange efficiency of flue gas in preheating cylinder 3 inside, preheating cylinder 3 outer surface welds with spiral heat conduction fin 7 and jacket 2, and spiral heat conduction fin 7 is located between jacket 2 and preheating cylinder 3, cavity for air flow is formed between jacket 2 and preheating cylinder 3, spiral heat conduction fin 7 is located in the cavity inside, spiral heat conduction fin 7 makes the cavity inside form spiral air flow channel, extend the flow distance of air in cavity inside, improve heat exchange efficiency, the lower surface of jacket 2 one side is fixedly connected with air inlet pipe 1, the upper surface of jacket 2 is fixedly connected with air outlet pipe 5 on the side away from air inlet pipe 1, rotating shaft 8 is rotatably installed in preheating cylinder 3 inside, rotating shaft 8 and preheating cylinder 3 are coaxial, cleaning plate 14 is fixedly installed on the outer surface of rotating shaft 8, and cleaning plate 14 is provided with several, and is provided with cleaning plate 14 at the position above and below each group of heat conduction plates 9.

[0023] The utility model in using, heating furnace discharges flue gas into preheating cylinder 3 inside, and contact with heat conduction plate 9, transfer heat to preheating cylinder 3, and air enters into jacket 2 inside from air inlet pipe 1, spiral heat conduction fin 7 makes air spiral flow in jacket 2 inside, extend the flow distance of air in jacket 2 inside, and fully contact with spiral heat conduction fin 7 and preheating cylinder 3 outer surface, improve the heat exchange efficiency of air, preheated air is discharged from air outlet pipe 5, rotating shaft 8 drives cleaning plate 14 to rotate, and cleaning plate 14 removes the soot adhered to the surface of heat conduction plate 9, to ensure the heat conduction efficiency of heat conduction plate 9. Example two

[0024] As Figure 1 , Figure 2 and Figure 5 As shown in the utility model discloses a kind of heating furnace with cylinder air preheater, compared to example one, the utility model further includes that preheating cylinder 3 upper surface and lower surface are welded with flange plate 4, preheating cylinder 3 is connected into heating furnace flue gas duct by flange plate 4 and bolt, and rotating shaft 8 outer surface is fixedly installed with fan blade 13 near top end position.

[0025] In the embodiment, the flue gas flowing in the preheating cylinder 3 drives the fan blade 13 to rotate, thereby driving the rotating shaft 8 to rotate. Embodiment three

[0026] As Figure 1 , Figure 2 , Figure 4 And Figure 5 The utility model discloses a cylinder type air preheater for heating furnace, compared with embodiment one, this embodiment still includes the first bevel gear 10 that rotation axis 8 bottom end fixed connection has, and the preheating cylinder 3 outer surface one side fixed mounting has rotation motor 6 near the lower surface position department, and the rotation motor 6 output shaft end fixed connection has the second bevel gear 12, and the first bevel gear 10 and the second bevel gear 12 are engaged, and the preheating cylinder 3 inside near the lower surface position department fixed has the protection shell 11, and rotation motor 6 output shaft and rotation axis 8 all run through the protection shell 11, and the first bevel gear 10 and the second bevel gear 12 all are located the protection shell 11 inside, and the setting of protection shell 11 can avoid the soot in flue gas to adhere to the first bevel gear 10 and the second bevel gear 12 outer surface, to the first bevel gear 10 and the second bevel gear 12 played the protection function, reduced both's wear and tear.

[0027] In this embodiment, the second bevel gear 12 is driven to rotate by the rotation motor 6, and the rotation shaft 8 is driven to rotate by the first bevel gear 10 and the second bevel gear 12 engaged with each other.

[0028] The above specific embodiments are only several preferred embodiments of the utility model, and based on the technical scheme of the utility model and the related inspiration of the above embodiments, the person skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A cylindrical air preheater for a heating furnace, comprising a jacket (2) and a preheating cylinder (3), characterized in that: The inner wall of the preheating cylinder (3) is uniformly welded with several heat-conducting plates (9). The outer surface of the preheating cylinder (3) is welded with a spiral heat-conducting plate (7) and a jacket (2). The spiral heat-conducting plate (7) is located between the jacket (2) and the preheating cylinder (3). An air inlet pipe (1) is fixedly connected to one side of the lower surface of the jacket (2). An air outlet pipe (5) is fixedly connected to the side of the upper surface of the jacket (2) away from the air inlet pipe (1). A rotating shaft (8) is rotatably installed inside the preheating cylinder (3). A cleaning plate (14) is fixedly installed on the outer surface of the rotating shaft (8).

2. The cylindrical air preheater for a heating furnace according to claim 1, characterized in that: The preheating cylinder (3) has flanges (4) welded to both its upper and lower surfaces.

3. A cylindrical air preheater for a heating furnace according to claim 1, characterized in that: A fan blade (13) is fixedly installed on the outer surface of the rotating shaft (8) near the top.

4. A cylindrical air preheater for a heating furnace according to claim 1, characterized in that: The bottom end of the rotating shaft (8) is fixedly connected to a first bevel gear (10), and a rotating motor (6) is fixedly installed on one side of the outer surface of the preheating cylinder (3) near the lower surface. The output shaft of the rotating motor (6) is fixedly connected to a second bevel gear (12), and the first bevel gear (10) and the second bevel gear (12) mesh with each other.

5. A cylindrical air preheater for a heating furnace according to claim 4, characterized in that: A protective shell (11) is fixed inside the preheating cylinder (3) near the lower surface. The output shaft and rotating shaft (8) of the rotating motor (6) both pass through the protective shell (11), and the first bevel gear (10) and the second bevel gear (12) are both located inside the protective shell (11).

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