Roasting furnace

Abstract

The roasting furnace comprises a furnace body, a heat insulation door, an air inlet device, an ignition device and an exhaust device, a laterally-opened hearth is arranged in the furnace body, the heat insulation door is hinged to the side face of the furnace body and can seal the hearth, the air inlet device and the exhaust device are both installed on the outer side of the furnace body, and the ignition device is installed in the furnace body. The output end of the air inlet device, the output end of the ignition device and the input end of the exhaust device are all located on the inner side of the hearth, a strip-shaped heightening structure is arranged at the bottom of the hearth, one end of the heightening structure is connected with the side wall of the hearth, the other end of the heightening structure faces an opening of the hearth, and a plurality of transversely-through air holes are formed in the heightening structure. The heightening structure provides enough space for circulation of natural gas and air for the bottom of the waste, and then the fluidity of the natural gas and the air is further improved through the air holes, so that the waste is heated in all directions during roasting, the temperature is rapidly increased from outside to inside, the roasting time is shortened, and the roasting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a roasting technology field, concretely relates to a roasting furnace. BACKGROUND

[0002] The roasting furnace can significantly reduce sintering temperature, greatly reduce energy consumption, and is widely used in waste recycling. When the waste to be treated is stacked in the hearth of the roasting furnace, the temperature rises slowly during roasting due to poor ventilation conditions at the bottom and inside, the overall roasting efficiency is low, and the roasting speed of the upper and lower layers of waste is not the same. The ash produced after roasting the upper layer of waste covers the surface of the lower layer of waste, and even forms a thick slag layer, affecting the full roasting of the lower layer of waste. SUMMARY

[0003] To solve the above technical problems, the utility model provides a roasting furnace, which shortens the roasting time and improves the roasting efficiency by setting the heightening structure.

[0004] The technical scheme of the utility model is as follows: a roasting furnace, comprising a furnace body, a heat insulation door, an air inlet device, an ignition device and an exhaust device, a side-open hearth is arranged in the furnace body, the heat insulation door is hinged to the side of the furnace body, the heat insulation door can close the hearth, the air inlet device and the exhaust device are both installed on the outside of the furnace body, the ignition device is installed in the furnace body, the output end of the air inlet device, the output end of the ignition device and the input end of the exhaust device are all located on the inside of the hearth, a strip-shaped heightening structure is arranged at the bottom of the hearth, one end of the heightening structure is connected with the side wall of the hearth, and the other end faces the opening of the hearth, and a plurality of transversely penetrating air holes are arranged in the heightening structure.

[0005] Further, the air holes are distributed in a honeycomb shape.

[0006] Further, the heightening structure has a plurality of structures and is distributed at intervals.

[0007] Further, a separation structure is arranged at the front end in the hearth, the separation structure is arranged symmetrically left and right, and the heightening structure is located on the inside of the separation structure.

[0008] Further, there is a round corner between the inside of the separation structure and the side of the hearth.

[0009] Further, a reinforcing plate is arranged on the outside of the furnace body, the reinforcing plate has a plurality of structures and is distributed in a longitudinal and transverse cross shape.

[0010] Further, the hearth has two structures and is symmetrically distributed in the furnace body, and a separation layer is arranged between the two hearths.

[0011] Further, a lead screw is hinged to the side of the furnace body, a hand wheel is threadedly connected to the lead screw, a U-shaped plate is arranged on the side of the heat insulation door, the lead screw can be rotatably embedded in the U-shaped plate, and the hand wheel can abut against the U-shaped plate from the side.

[0012] Compared with the prior art, the utility model discloses the advantage lies in: through the heightening structure is the bottom of waste and provides enough space for natural gas and air circulation, further through the air hole and promote the flowability of natural gas and air, when waste is roasted, all -round heating, from outside to inside fast heating, shorten the roasting time, improve the roasting efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, below will to the drawing needed to use in the embodiment or prior art description simple introduction, obviously, below description's drawing only some embodiments of the utility model, for the ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0014] Figure 1 It is the structural schematic diagram of the utility model;

[0015] Figure 2 It is Figure 1 The enlarged view of A in Fig.

[0016] Figure 3 It is the open state diagram of the utility model;

[0017] Figure 4 It is Figure 3 The enlarged view of B in Fig.

[0018] Figure 5 It is Figure 3 The enlarged view of C in Fig.

[0019] Wherein: 1, furnace body;2, reinforcing plate;3, air inlet device;4, ignition device;5, exhaust device;6, heat insulation door;7, heightening structure;8, air hole;9, isolation structure;10, U-shaped plate;11, screw rod;12, hand wheel. DETAILED DESCRIPTION

[0020] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined invention purposes, the specific implementation, structure, features and effects according to the utility model are described in detail as follows by combining with the drawings and preferred embodiments.

[0021] As Figures 1-5As shown, a roasting furnace comprises a furnace body 1, a heat insulation door 6, an air inlet device 3, an ignition device 4 and an air outlet device 5, the furnace body 1 is provided with a side-open hearth, the heat insulation door 6 is hinged to the side of the furnace body 1 and can close the hearth, the air inlet device 3 and the air outlet device 5 are both installed outside the furnace body 1, the ignition device 4 is installed inside the furnace body 1, the output end of the air inlet device 3, the output end of the ignition device 4 and the input end of the air outlet device 5 are all located inside the hearth; the waste containing precious metals to be treated is centrally stacked in the hearth, after the heat insulation door 6 is locked, natural gas and air are introduced into the hearth through the air inlet device 3, and the ignition device 4 is ignited to roast the waste, wherein the air inlet device 3, the ignition device 4 and the air outlet device 5 are all prior art; the smoke and dust generated after roasting enters the secondary combustion chamber through the air outlet device 5, while the ash remains in the hearth and needs to be cleaned manually or mechanically. The hearth bottom is provided with a strip-shaped heightening structure 7, one end of the heightening structure 7 is connected with the hearth sidewall, and the other end faces the opening of the hearth, which facilitates the cleaning work after roasting is completed; a plurality of transversely-through air holes 8 are arranged in the heightening structure 7, when the waste to be treated is centrally stacked in the hearth, the bottom and the inside of the waste have poor ventilation conditions, the temperature rising speed during roasting is slow, the overall roasting efficiency is low, and the roasting speeds of the upper and lower layers of the waste are different, the ash generated after roasting of the upper layer of waste is coated on the surface of the lower layer of waste, and even a relatively thick slag layer is formed, which affects the full roasting of the lower layer of waste, the heightening structure 7 provides sufficient space for the bottom of the waste for the circulation of natural gas and air, and the air holes 8 further improve the flowability of natural gas and air, so that the waste is heated in all directions during roasting, the temperature rises rapidly from the outside to the inside, the roasting time is shortened, and the roasting efficiency is improved.

[0022] In the above embodiment, the air holes 8 are distributed in a honeycomb shape, increasing the gas flow space and further improving the gas flowability and the supply rate of natural gas and air. The multiple elevation structures 7 are spaced apart and arranged in series to form an elevation platform. The elevation structures 7 provide flow space for natural gas and air and storage space for ash. The ash is prevented from covering the bottom layer of waste and causing low central roasting efficiency. The front end of the hearth is provided with a partition structure 9, which is symmetrically arranged on the left and right sides. The elevation structures 7 are located inside the partition structure 9. Due to the different shapes of the waste, the waste is prone to sliding during stacking. The partition structure 9 can clamp the waste from both sides of the hearth to prevent the waste from sliding out of the hearth as much as possible, facilitating the loading of the waste. The inside of the partition structure 9 and the side of the hearth are rounded to remove the health dead angle and facilitate the cleaning of the ash. The outer side of the furnace body 1 is provided with a reinforcing plate 2. The reinforcing plate 2 is multiple and arranged in a longitudinal and transverse cross shape. The reinforcing plate 2 can enhance the overall strength of the furnace body 1 and ensure that the furnace body 1 has high stability and safety under the influence of high temperature and room temperature. The hearth is provided with two symmetrically arranged furnace bodies 1. The two furnace bodies are provided with a partition layer. The two furnace bodies share the secondary combustion chamber and the tail gas treatment device, improving the waste treatment efficiency. The side of the furnace body 1 is hingedly connected with a lead screw 11. The lead screw 11 is threadedly connected with a hand wheel 12. The side of the heat insulation door 6 is provided with a U-shaped plate 10. The lead screw 11 can be rotatably embedded in the U-shaped plate 10. The hand wheel 12 can abut against the U-shaped plate 10 from the side to further reinforce the heat insulation door 6 and ensure the safety and explosion resistance of the heat insulation door 6 during operation.

[0023] The working mode of the utility model is described as follows:

[0024] The waste containing precious metals is stacked in two 500kg-capacity hearths. After the heat insulation door 6 is locked, natural gas and air are supplied to the hearths through the air inlet device 3, and the waste is roasted by the ignition device 4. During the roasting process, the elevation structures 7 provide sufficient space for the bottom of the waste to flow natural gas and air. The air holes 8 further improve the flowability of the natural gas and air, so that the waste is heated all-round and quickly heated from the outside to the inside, shortening the roasting time and improving the roasting efficiency. The smoke generated after roasting enters the secondary combustion chamber through the exhaust device 5, and the ash remains in the hearth. The space around the elevation structures 7 is manually cleaned, and the air blowing or vacuum cleaner is used to dredge the air holes 8. The cleaned ash is swept out along the round corners of the partition structure 9, avoiding the remaining health dead angle.

[0025] The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A calcining furnace comprising a furnace body, an insulating door, an air inlet device, an ignition device, and an air outlet device, characterized in that: The furnace body is internally provided with a side-open hearth, a heat insulation door is hinged to the side of the furnace body, the heat insulation door can close the hearth, the air inlet device and the air outlet device are both installed outside the furnace body, the ignition device is installed inside the furnace body, the output end of the air inlet device, the output end of the ignition device and the input end of the air outlet device are all located inside the hearth, the hearth bottom is provided with a strip-shaped heightening structure, one end of the heightening structure is connected with the hearth side wall and the other end faces the hearth opening, and a plurality of transversely-through air holes are arranged in the heightening structure.

2. The calciner according to claim 1, characterized in that: The air holes are distributed in a honeycomb shape.

3. The calciner of claim 1, wherein: The heightening structure is multiple and is distributed in intervals.

4. The calciner of claim 1, wherein: The front end inside the hearth is provided with an isolation structure, the isolation structure is symmetrically arranged left and right, and the heightening structure is located inside the isolation structure.

5. The calciner of claim 4, wherein: There is a round corner between the inside of the isolation structure and the hearth side.

6. The calciner of claim 1, wherein: The furnace body is externally provided with reinforcing plates, the reinforcing plates are multiple and are distributed in longitudinal and transverse intersections.

7. The calciner of claim 1, wherein: The hearth is two and is symmetrically distributed inside the furnace body, and a partition layer is arranged between the two hearths.

8. The calciner of claim 1, wherein: The side of the furnace body is hinged with a screw rod, a hand wheel is threadedly connected to the screw rod, the side of the heat insulation door is provided with a U-shaped plate, the screw rod is rotatably embedded in the U-shaped plate, and the hand wheel can abut against the U-shaped plate from the side.

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