Energy-saving fluidized bed roaster

Abstract

The utility model discloses an energy-saving fluidized bed roaster in the technical field of fluidized bed roaster. The energy-saving fluidized bed roaster comprises a roaster body fixed on a fixing frame. The furnace body is composed of an upper hearth and a lower feeding section, and the bottom of the furnace body is communicated with an air bellow. And an air distribution plate is arranged at the joint of the furnace body and the air bellow. A first electromagnetic heating coil and a second electromagnetic heating coil are arranged on the side walls of the air bellow and the hearth correspondingly. A feeding port is formed in one side of the feeding section, the feeding port is communicated with a quantitative feeding device, and one side of the feeding section is communicated with an inclined overflow discharging pipe. An air inlet is formed in one side of the air bellow and communicates with an air supply device through a ventilation pipe. The heating mode is improved, and an electromagnetic heating mode is adopted, so that energy conservation and environmental protection are better achieved; and secondary heating is performed in the hearth, so that the material reaction time is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidized bed roasting furnaces, in particular to an energy-saving fluidized bed roasting furnace. Background Art

[0002] Modern fluidized bed furnaces are thermal equipment that utilizes fluidized bed technology. When a fluid flows from bottom to top through a static granular material layer, if the flow rate exceeds a certain limit, the bulk material layer begins to expand and creep and becomes fluid, turning into a pseudo-fluid state. This process is called fluidization of the bulk material layer. The granular material after fluidization flips up and down, which is similar to the boiling of the fluid, so it is also called a boiling layer. Thermal equipment that uses this method to process materials is called a fluidized bed furnace.

[0003] However, in the context of energy conservation, emission reduction and environmental protection, there are still a large number of small and medium-sized fluidized bed roasters that use traditional heat sources, such as steam heating and direct fuel heating, which not only consume a lot of energy, but are also not clean and environmentally friendly. Therefore, it is urgent to improve the practical application of small and medium-sized fluidized bed roasters. Utility Model Content

[0004] The main purpose of the utility model is to provide an energy-saving boiling roasting furnace to solve the problems mentioned in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An energy-saving fluidized bed roasting furnace comprises a furnace body fixed to a fixed frame. The furnace body is composed of an upper furnace chamber and a lower feeding section, and a bellows is connected to the bottom of the furnace body. An air distribution plate is provided at the connection between the furnace body and the bellows. The side walls of the bellows and the furnace chamber are respectively provided with a first electromagnetic heating coil and a second electromagnetic heating coil. A feeding port is provided on one side of the feeding section, and the feeding port is connected to a quantitative feeding device, and an inclined overflow discharge pipe is connected to one side of the feeding section. An air inlet is provided on one side of the bellows, and the air inlet is connected to an air supply device through a ventilation pipe.

[0007] Furthermore, the quantitative feeding device is a screw feeder.

[0008] Furthermore, the air supply device is an induced draft fan.

[0009] Furthermore, a furnace gas outlet and a smoke exhaust port are provided on the top of the furnace body, and a safety valve is provided at the furnace gas outlet.

[0010] Furthermore, both the first electromagnetic heating coil and the second electromagnetic heating coil are powered by alternating current.

[0011] Further, the furnace is constructed in a cylindrical shape, and the feeding section is constructed in a funnel shape.

[0012] The utility model also includes other components that enable the energy-saving fluidized bed roasting furnace to be used normally, and these devices or components all adopt conventional technical means in the art. In addition, the devices and components not limited in the utility model all adopt conventional technical means in the art, such as the screw feeder in this application. In the specific implementation process, the appropriate equipment or component model can be selected according to the specific working scene.

[0013] The working principle of the utility model is: the induced draft fan introduces air into the wind box through the ventilation pipe, a first electromagnetic heating coil is arranged on the side wall of the wind box to heat the air in the wind box, and at the same time, a screw feeder is used to add material to the feeding section in a quantitative manner. The material is heated once by the hot air from the wind box and then enters the furnace, and is then heated for a second time by the second electromagnetic heating coil.

[0014] Compared with the prior art, the utility model has the following beneficial effects: 1. Improve the heating method, adopt electromagnetic heating method, which is more energy-saving and environmentally friendly. 2. Perform secondary heating in the furnace to extend the reaction time of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the overall structure of an energy-saving boiling roasting furnace.

[0016] In the figure: 1. fixing frame; 2. furnace body; 3. bellows; 31. first electromagnetic heating coil; 32. air inlet; 4. ventilation duct; 5. induced draft fan; 6. air distribution plate; 7. furnace; 8. second electromagnetic heating coil; 9. overflow discharge pipe; 10. feeding port; 11. screw feeder; 12. furnace gas outlet; 13. smoke exhaust port; 14. safety valve; 15. feeding section. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] Example:

[0019] like Figure 1 As shown, an energy-saving boiling roasting furnace includes a furnace body 2 fixed to a fixed frame 1. The furnace body 2 is composed of an upper furnace chamber 7 and a lower feeding section 15, and a bellows 3 is connected to the bottom of the furnace body 2. An air distribution plate 6 is provided at the connection between the furnace body 2 and the bellows 3. The side walls of the bellows 3 and the furnace chamber 7 are respectively provided with a first electromagnetic heating coil 31 and a second electromagnetic heating coil 8. A feeding port 10 is provided on one side of the feeding section 15, and the feeding port 10 is connected to a quantitative feeding device, and an inclined overflow discharge pipe 9 is connected to one side of the feeding section 15. An air inlet 32 ​​is provided on one side of the bellows 3, and the air inlet 32 ​​is connected to an air supply device through a ventilation pipe 4.

[0020] Specifically, the air supply device is an induced draft fan 5. The quantitative feeding device is a screw feeder 11. The first electromagnetic heating coil 31 and the second electromagnetic heating coil 8 are both powered by alternating current. The furnace 7 is configured in a cylindrical shape, and the feeding section 15 is configured in a funnel shape.

[0021] In addition, a furnace gas outlet 12 and a smoke exhaust port 13 are provided at the top of the furnace body 2 , and a safety valve 14 is provided at the furnace gas outlet 12 .

[0022] The working principle of the energy-saving boiling roasting furnace of the utility model is: the induced draft fan 5 introduces air into the wind box 3 through the ventilation pipe 4, the first electromagnetic heating coil 31 is arranged on the side wall of the wind box 3 to heat the air in the wind box 3, and at the same time, the material is quantitatively added into the feeding section 15 with the help of the spiral feeder 11, the material is heated once by the hot air from the wind box 3 and then enters the furnace 7, and then is heated twice by the second electromagnetic heating coil 8.

[0023] The above embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope of the present invention.

Claims

1. An energy-saving fluidized bed roasting furnace, comprising a furnace body (2) fixed to a fixing frame (1), characterized in that: The furnace body (2) is composed of an upper furnace chamber (7) and a lower feeding section (15), and the bottom of the furnace body (2) is connected to a bellows (3); an air distribution plate (6) is provided at the connection between the furnace body (2) and the bellows (3); the side walls of the bellows (3) and the furnace chamber (7) are respectively provided with a first electromagnetic heating coil (31) and a second electromagnetic heating coil (8); a feeding port (10) is provided on one side of the feeding section (15), and the feeding port (10) is connected to a quantitative feeding device, and a tilted overflow discharge pipe (9) is connected to one side of the feeding section (15); an air inlet (32) is provided on one side of the bellows (3), and the air inlet (32) is connected to an air supply device through a ventilation pipe (4).

2. The energy-saving fluidized bed roasting furnace according to claim 1, characterized in that: The quantitative feeding device is a screw feeder (11).

3. The energy-saving fluidized bed roasting furnace according to claim 1, characterized in that: The air supply device is an induced draft fan (5).

4. The energy-saving fluidized bed roasting furnace according to claim 1, characterized in that: A furnace gas outlet (12) and a smoke exhaust port (13) are provided on the top of the furnace body (2), and a safety valve (14) is provided at the furnace gas outlet (12).

5. The energy-saving fluidized bed roasting furnace according to claim 1, characterized in that: The first electromagnetic heating coil (31) and the second electromagnetic heating coil (8) are both powered by alternating current.

6. The energy-saving fluidized bed roasting furnace according to claim 1, characterized in that: The furnace chamber (7) is configured in a cylindrical shape, and the feeding section (15) is configured in a funnel shape.

Images