Double-layer rotary heating equipment and application method thereof

Abstract

The invention relates to double-layer rotary heating equipment and an application method thereof, and relates to the technical field of pyrolysis equipment. The equipment comprises a furnace tube body, a second treatment furnace tube and a heating chamber, the furnace tube body and the second treatment furnace tube are arranged in sequence, and the second treatment furnace tube is communicated with the furnace tube body; the furnace tube body and the second treatment furnace tube simultaneously rotate around the axes in the respective length directions through the transmission system; a discharge valve is arranged at the communication part of the second treatment furnace tube and the furnace tube body; and the rotating part of the second treatment furnace tube and the rotating part of the furnace tube body penetrate through the heating chamber. In the working process, the second treatment furnace tube and the furnace tube body rotate synchronously, and only one heat source is needed for heating, so that the energy consumption is reduced, and the advantages of high efficiency, cost reduction and small occupied area are achieved; in addition, the conveying process of the materials from one independent device to another independent device is omitted, and therefore heat loss caused by the conveying process and energy loss in the reheating process are avoided.

Description

Technical Field

[0001] The present application relates to the technical field of pyrolysis equipment, and in particular to a double-layer rotary heating equipment and an application method thereof. Background Art

[0002] The rotary kiln is a thermal equipment used for calcining materials. It has a wide range of materials to choose from and can calcine materials from a variety of industries, such as limestone, expanded clay sand, etc.

[0003] At present, the furnace body of the rotary furnace is a long metal cylinder, which is supported on several pairs of supporting wheels. After the materials are loaded into the furnace body, the furnace body is driven by an electric motor through gears to rotate. During this process, the materials are fully calcined in the high temperature environment of the furnace body.

[0004] However, in the actual processing of materials, the materials usually need to be pre-processed or post-processed with additional heating equipment (such as drying steps). This requires the materials to be transported from the rotary kiln to another heating device, or from another heating device to the rotary kiln. This transportation process not only causes heat loss, but also requires reheating, which increases energy consumption and takes a long time. Summary of the invention

[0005] In view of the above problems, the present application provides a double-layer rotary heating device and an application method thereof. The double-layer rotary heating device provided in the present application adopts the following technical solutions: In the first aspect, the present application provides a double-layer rotary heating device, comprising a furnace tube body, a second processing furnace tube and a heating chamber, wherein the furnace tube body and the second processing furnace tube are arranged in sequence, and the second processing furnace tube is connected to the furnace tube body; the furnace tube body and the second processing furnace tube rotate around their respective length axes simultaneously through a transmission system, the connecting point between the second processing furnace tube and the furnace tube body is rotationally connected to the second processing furnace tube, and the connecting point between the furnace tube body and the second processing furnace tube is rotationally connected to the furnace tube body; the feed inlet and the discharge port of the furnace tube body are respectively located at the two ends of the length direction thereof, and a discharge valve is provided at the connecting point between the second processing furnace tube and the furnace tube body; a feed port is provided on one side of the second processing furnace tube; the rotating part of the second processing furnace tube and the rotating part of the furnace tube body both pass through the heating chamber.

[0006] Optionally, the sprocket transmission member is connected to both the furnace tube body and the second processing furnace tube, the driving part of the driving member is connected to the sprocket transmission member, and the driving member is used to drive the sprocket transmission member and simultaneously drive the furnace tube body and the second processing furnace tube to rotate around their respective length axes; the supporting wheel is located between the furnace tube body and the second processing furnace tube, and the rotating axis of the supporting wheel is parallel to the rotating axis of the furnace tube body.

[0007] Optionally, the heating chamber includes a heat generating chamber and an insulation chamber, the heat generating chamber is located below the furnace tube body, the heat generating chamber is a hollow frame without a top wall made of refractory bricks, and a burner is provided on a side wall of the heat generating chamber; The insulation chamber is a hollow frame without a bottom wall surrounded by insulation cotton. The insulation chamber is located above the heat generating chamber and forms a closed cavity with the heat generating chamber. The rotating part of the second processing furnace tube and the rotating part of the furnace tube body both pass through the insulation chamber.

[0008] Optionally, a heat transfer layer is provided between the heat generating chamber and the insulation chamber, and the heat transfer layer is provided with through holes.

[0009] Optionally, a heat-conducting layer is provided between the second processing furnace tube and the furnace tube body, and the heat-conducting layer is provided with a through hole.

[0010] Optionally, a heat insulation layer is provided around the outside of the heating chamber.

[0011] Optionally, at least one of the following features (a)-(c): (a) the second treatment furnace tube is provided with a tail gas outlet, the tail gas outlet is connected to a tail gas treatment device, and the tail gas treatment device is used to treat the flue gas in the second treatment furnace tube; (b) the discharge port is connected to a slag discharge system, and the slag discharge system is used to cool the material discharged through the discharge port; (c) The furnace tube body is connected to a condensation system, and the condensation system is used to condense the oil and gas in the furnace tube body into liquid.

[0012] Optionally, the second processing furnace tube and the furnace tube body are both hollow tubular structures with thin ends and thick middle, and the middle position of the furnace tube body and the middle position of the second processing furnace tube are both arranged in the heating chamber; the furnace tube body and the second processing furnace tube are both provided with feeding components.

[0013] In a second aspect, the present application discloses an application method of a double-layer rotary heating device, comprising the following steps: The material is transported to the second treatment furnace tube, the transmission system is started, and the temperature in the second treatment furnace tube is controlled at 100°C-430°C through the heating chamber, and the material is heated at this temperature for 1h-4h to remove moisture and smoke from the material; Open the discharge valve to allow the smoke-exhausted and dehumidified material to be transported to the furnace tube body, and control the temperature in the furnace tube body to 430°C-600°C through the heating chamber. Treat at this temperature for 3h-6h to crack the smoke-exhausted and dehumidified material; The cracked slag is discharged through the discharge port.

[0014] Optionally, when the discharge port is connected to the slag discharge system, the slag after cracking enters the slag discharge system and is collected after being cooled to room temperature; when the exhaust gas outlet is connected to the exhaust gas treatment device, the wet flue gas generated in the second treatment furnace tube can be treated by the exhaust gas treatment device and then discharged; when the furnace tube body is connected to the condensation system, the oil and gas generated during the cracking process can be condensed into liquid through the condensation system and temporarily stored in the oil storage tank.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: By connecting the second processing furnace tube with the furnace tube body, and the second processing furnace tube and the furnace tube body rotate simultaneously through the transmission system, the second processing furnace tube and the furnace tube body both pass through the heating chamber. During operation, the second processing furnace tube and the furnace tube body rotate synchronously, and only one heat source is needed for heating, which not only reduces energy consumption, but also has the advantages of high efficiency, cost reduction and small footprint, and eliminates the process of transporting materials from one independent device to another, thereby avoiding the heat loss and energy loss caused by the reheating process. The application process of the double-layer rotary heating equipment is also simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0017] Figure 1 It is a partial cross-sectional schematic diagram of a double-layer rotary heating device according to an embodiment of the present application; Figure numerals: 1, furnace tube body; 11, feed inlet; 12, discharge port; 2, second treatment furnace tube; 21, feed port; 3, heating chamber; 31, heat generating chamber; 32, insulation chamber; 33, burner; 4, transmission system; 41, drive member; 42, sprocket transmission member; 43, support wheel; 5, discharge valve; 6, dynamic-static seal; 7, heat transfer layer; 8, exhaust gas outlet; 9, heat conductive layer. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1 This application is described in further detail.

[0019] The first aspect of the embodiment of the present application discloses a double-layer rotary heating device. Figure 1The double-layer rotary heating device includes a furnace tube body 1, a second treatment furnace tube 2 and a heating chamber 3. The furnace tube body 1 and the second treatment furnace tube 2 are arranged in sequence, and the second treatment furnace tube 2 is connected to the furnace tube body 1; the furnace tube body 1 and the second treatment furnace tube 2 rotate around their respective length axis simultaneously through a transmission system 4, and the connection between the second treatment furnace tube 2 and the furnace tube body 1 is rotationally connected to the second treatment furnace tube 2, and the connection between the furnace tube body 1 and the second treatment furnace tube 2 is rotationally connected to the furnace tube body 1. A discharge valve 5 is provided at the connection between the second treatment furnace tube 2 and the furnace tube body 1; the feed inlet 11 and the discharge outlet 12 of the furnace tube body 1 are respectively located at the two ends of the length direction thereof, and a feed port is provided on one side of the second treatment furnace tube 2. The rotating part of the second treatment furnace tube 2 and the rotating part of the furnace tube body 1 both pass through the heating chamber 3, and the temperature of the second treatment furnace tube 2 and the temperature of the furnace tube body 1 can be regulated by controlling the heating chamber 3.

[0020] In some specific embodiments, the furnace tube body 1 and the second treatment furnace tube 2 are parallel horizontal structures, and the furnace tube body 1 is located below the second treatment furnace tube 2. The second treatment furnace tube 2 can be a tubular furnace used for other treatment steps such as a drying furnace, and the furnace tube body 1 and the second treatment furnace tube 2 are both made of metal materials. In addition, the furnace tube body 1 and the second treatment furnace tube 2 are both cylindrical in shape.

[0021] like Figure 1 As shown, the transmission system 4 includes a driving member 41, a sprocket transmission member 42 and a supporting wheel 43. The sprocket transmission member 42 is in transmission connection with both the furnace tube body 1 and the second treatment furnace tube 2. The driving member 41 is used to drive the sprocket transmission member 42 and simultaneously drive the furnace tube body 1 and the second treatment furnace tube 2 to rotate around their respective lengthwise axes. The supporting wheel 43 is located between the furnace tube body 1 and the second treatment furnace tube 2, and the rotation axis of the supporting wheel 43 is parallel to the rotation axis of the furnace tube body 1. The driving member 41 can be a motor, and the driving shaft of the motor is key-connected with a sprocket in the sprocket transmission member 42. The sprocket is coaxially fixedly connected with the furnace tube body 1, and another sprocket in the sprocket transmission member 42 is coaxially fixedly connected with the second treatment furnace tube 2. The chain in the sprocket transmission member 42 is sleeved outside the sprocket in the sprocket transmission member 42 and meshes with the sprocket. The supporting wheel 43 is rotatably connected between the second processing furnace tube 2 and the furnace tube body 1 through a rotating shaft, and can simultaneously support the second processing furnace tube 2 and the furnace tube body 1. The present application does not limit the specific structure of the supporting wheel 43.

[0022] It should be noted that if Figure 1As shown, the connection between the furnace tube body 1 and the second treatment furnace tube 2 is provided with a dynamic-static seal 6, and the dynamic-static seal 6 includes a dynamic seal and a static seal, that is, the connection between the furnace tube body 1 and the second treatment furnace tube 2 is provided with a graphite end face, a mechanical and gas ring combined sealing structure, and the graphite adopts an end face graphite ring; the mechanical seal adopts an automatic compensation sealing mode, and the sealing performance is good, no air leakage and powder leakage, and easy maintenance; the gas ring seal adopts a nitrogen gas source, a multi-point air intake mode, and a nitrogen sealing atmosphere is formed on the sealing surface, the furnace atmosphere and the outside air are separated, and the gas in the furnace is prevented from overflowing and the outside air from entering. The setting of the dynamic seal and the static seal promotes the dynamic sealing effect of the rotating connection of the furnace tube body 1 and the rotating connection of the second treatment furnace tube 2 on the basis of ensuring that the furnace tube body 1 and the second treatment furnace tube 2 can rotate relatively, and avoids the internal overflow and leakage of the gas inside and outside the furnace tube during the operation of the whole equipment, and ensures the safety of the equipment operation. It is understandable that when detecting whether there is leakage at the connection between the furnace tube body 1 and the second treatment furnace tube 2, an exhaust gas detection instrument may be installed next to the sealing structure.

[0023] As an example, the feed port 21 is located on the same side as the discharge port 12. It is understandable that the feed port 11, the discharge port 12 and the feed port 21 are all connected with an on / off switch, and the materials in the furnace tube body 1 and the second treatment furnace tube 2 can be transported manually or by means of a material transmission component.

[0024] Reference Figure 1 The heating chamber 3 includes a heat generating chamber 31 and a heat preservation chamber 32. The heat generating chamber 31 is located below the furnace tube body 1. The heat generating chamber 31 is a hollow frame without a top wall made of refractory bricks. A burner 33 is provided on one of the side walls of the heat generating chamber 31. In other words, the burner 33 can be obtained by reserving a position when building the heating chamber 3. It can be understood that the port of the burner 33 can be blocked by a high-temperature resistant plugging piece. The heat preservation chamber 32 is a hollow frame without a bottom wall surrounded by heat preservation cotton. The heat preservation chamber 32 is located above the heat generating chamber 31 and can form a closed cavity with the heat generating chamber 31; the second treatment furnace tube 2 and the furnace tube body 1 both pass through the heat preservation chamber 32. The heat generated in the heat generating chamber 31 can be filled in the cavity surrounded by the heat preservation chamber 32 and the heat generating chamber 31. The heating chamber 3 can be connected to a temperature control module, which can adjust the temperature of the furnace tube body 1 and the temperature of the second treatment furnace tube 2 separately or simultaneously.

[0025] Reference Figure 1The second treatment furnace tube 2 and the furnace tube body 1 are both hollow tubular structures with thin ends and thick middle, and the middle position of the furnace tube body 1 and the middle position of the second treatment furnace tube 2 are both arranged in the insulation chamber 32. In other words, the thicker part in the middle of the furnace tube body 1 and the second treatment furnace tube 2 are both arranged in the insulation chamber 32, which helps to make the second treatment furnace tube 2 and the furnace tube body 1 fully contact with heat. A material transmission component can be set in the second treatment furnace tube 2 and the furnace tube body 1. As an example, the material transmission component can be a feed spiral auger.

[0026] During the operation of the double-layer rotary heating equipment, there are two main working modes: (1) the second processing furnace tube 2 processes the material first, and then the furnace tube body 1 processes the material. In this process, the material is transported by the feed screw auger and enters the second processing furnace tube 2 through the feed port 21. After the second processing furnace tube 2 is processed, the discharge valve 5 is opened to allow the material to enter the furnace tube body 1. After the furnace tube body 1 is processed, the material is discharged through the discharge port 12; (2) the second processing furnace tube 2 and the furnace tube body 1 process the material at the same time. At this time, part of the material is transported to the second processing furnace tube 2 through the feed port 21 through the feed screw auger, and part of the material enters the furnace tube body 1 through the feed port 11 through the feed screw auger. After the second processing furnace tube 2 and the furnace tube body 1 are processed, the discharge valve 5 is opened, and the material in the second processing furnace tube 2 enters the furnace tube body 1 and is discharged from the discharge port 12 together with the material in the furnace tube body 1.

[0027] In the above two working modes, the second processing furnace tube 2 rotates synchronously with the furnace tube body 1, and only one heat source is needed to heat the furnace tube body 2 and the second processing furnace tube 2 at the same time, which not only reduces energy consumption, but also has the advantages of high efficiency, cost reduction and small footprint, and also saves the material from the independent equipment to another independent equipment between the transportation process, thereby avoiding the heat loss and energy loss of the reheating process caused thereby, and the material processing method is more flexible. It should be noted that the temperature of the furnace tube body 1 and the second processing furnace tube 2 can be adjusted to the same temperature or different temperatures by the temperature control module connected to the heating chamber 3. It is understandable that the furnace tube body 1 can also be used alone, and the method of using the furnace tube body 1 alone will not be repeated.

[0028] In some specific embodiments, Figure 1 As shown, a heat transfer layer 7 is provided between the heat generating chamber 31 and the heat preservation chamber 32. The heat transfer layer 7 is provided with through holes. The heat transfer layer 7 may be made of an alumina fiber board. The through holes of the heat transfer layer 7 can better transfer heat. In addition, a heat insulation layer may be provided outside the entire heating chamber 3. The heat insulation layer may be made of ceramic fiber blocks. The heat insulation layer may further promote the heat in the heating chamber 3 to be less likely to be lost. In other embodiments, such as Figure 1As shown, the second treatment furnace tube 2 is provided with an exhaust gas outlet 8, the exhaust gas outlet 8 passes through the insulation chamber 32, the exhaust gas outlet 8 is connected to a switch for controlling its opening and closing, and the exhaust gas outlet 8 can be used for exhaust and heat dissipation.

[0029] In some embodiments, reference Figure 1 A heat conducting layer 9 is provided between the second treatment furnace tube 2 and the furnace tube body 1. It can be understood that the heat conducting layer 9 is provided with a through hole, and the through hole of the heat conducting layer 9 is not connected to the burner 33. The heat conducting layer 9 can also use an alumina fiberboard. The through hole of the heat conducting layer 9 helps to better transfer heat.

[0030] In some embodiments, the exhaust gas outlet 8 may be connected to an exhaust gas treatment device, which is used to treat the flue gas in the second treatment furnace tube 2; in some embodiments, the discharge port 12 may be connected to a slag discharge system, which is used to cool the material discharged through the discharge port; in other embodiments, the furnace tube body 1 may be connected to a condensation system, which is used to condense the oil and gas in the furnace tube body 1 into liquid.

[0031] In a second aspect, the present application discloses an application method of a double-layer rotary heating device, comprising the following steps: The material is transported to the second treatment furnace tube 2, the transmission system 4 is started, and the temperature in the second treatment furnace tube 2 is controlled at 100°C-430°C through the heating chamber 3, and heated at this temperature for 1h-4h to remove moisture and smoke from the material; Open the discharge valve 5 to allow the exhaust and dehumidified materials to be transported to the furnace tube body 1. The temperature in the furnace tube body 1 is controlled at 430°C-600°C by the heating chamber 3. The materials are treated at this temperature for 3h-6h to be cracked. The cracked slag is discharged through the discharge port 12.

[0032] It is understandable that when the discharge port 12 is connected to the slag discharge system, the cracked slag can be allowed to enter the slag discharge system, and the cracked slag can be collected after cooling to room temperature. When the tail gas outlet 8 is connected to the tail gas treatment device, the wet flue gas generated in the second treatment furnace tube 2 can be discharged after being treated by the tail gas treatment device; when the furnace tube body 1 is connected to the condensation system, the oil and gas generated during the cracking process can be condensed into liquid by the condensation system and temporarily stored in the oil storage tank.

[0033] As a specific example, the oil shale with a particle size of less than 10 mm is sent to the second processing furnace tube 2 through the feed port 21, the transmission system 4 and the heating chamber 3 are started, and the material in the second processing furnace tube 2 is heated at 200°C for 3 hours. In this process, the wet flue gas generated is treated by the exhaust gas treatment device and then discharged; after the second processing furnace tube 2 is treated, the discharge valve 5 is opened, and the material after exhaust and dehumidification is transported to the furnace tube body 1, and treated at a temperature of 550°C for 6 hours. The material after exhaust and dehumidification is cracked. In this process, the temperature of the oil and gas generated by cracking is 100°C-200°C, and the oil and gas can be condensed into liquid through the condensation system and enter the oil storage tank for temporary storage; the slag generated by the cracking enters the slag discharge system through the discharge port 12, and the slag is collected after cooling to room temperature.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A double-layer rotary heating device, characterized in that: It includes a furnace tube body, a second processing furnace tube and a heating chamber, wherein the furnace tube body and the second processing furnace tube are arranged in sequence, and the second processing furnace tube is connected to the furnace tube body; the furnace tube body and the second processing furnace tube rotate around their respective length axis simultaneously through a transmission system, the connecting point between the second processing furnace tube and the furnace tube body is rotationally connected to the second processing furnace tube, and the connecting point between the furnace tube body and the second processing furnace tube is rotationally connected to the furnace tube body; the feed inlet and the discharge outlet of the furnace tube body are respectively located at the two ends of the length direction, and a discharge valve is provided at the connecting point between the second processing furnace tube and the furnace tube body; a feed port is provided on one side of the second processing furnace tube; the rotating part of the second processing furnace tube and the rotating part of the furnace tube body both pass through the heating chamber.

2. A double-layer rotary heating device according to claim 1, characterized in that: The furnace tube body is located below the second processing furnace tube, and the transmission system includes a driving member, a sprocket transmission member and a supporting wheel. The sprocket transmission member is connected to both the furnace tube body and the second processing furnace tube, and the driving part of the driving member is connected to the sprocket transmission member. The driving member is used to drive the sprocket transmission member and simultaneously drive the furnace tube body and the second processing furnace tube to rotate around their respective length axes; the supporting wheel is located between the furnace tube body and the second processing furnace tube, and the rotating axis of the supporting wheel is parallel to the rotating axis of the furnace tube body.

3. A double-layer rotary heating device according to claim 2, characterized in that: The heating chamber includes a heat generating chamber and a heat preservation chamber. The heat generating chamber is located below the furnace tube body. The heat generating chamber is a hollow frame without a top wall made of refractory bricks. A burner is provided on the side wall of the heat generating chamber. The insulation chamber is a hollow frame without a bottom wall surrounded by insulation cotton. The insulation chamber is located above the heat generating chamber and forms a closed cavity with the heat generating chamber. The rotating part of the second processing furnace tube and the rotating part of the furnace tube body both pass through the insulation chamber.

4. A double-layer rotary heating device according to claim 3, characterized in that: A heat transfer layer is arranged between the heat generating chamber and the insulation chamber, and the heat transfer layer is provided with through holes.

5. The double-layer rotary heating device according to claim 1, characterized in that: A heat-conducting layer is arranged between the second processing furnace tube and the furnace tube body, and the heat-conducting layer is provided with heat-conducting through holes.

6. The double-layer rotary heating device according to claim 1, characterized in that: The outside of the heating chamber is surrounded by a heat insulation layer.

7. A double-layer rotary heating device according to any one of claims 1 to 6, characterized in that: Include at least one of the following features (a)-(c): (a) the second treatment furnace tube is provided with a tail gas outlet, the tail gas outlet is connected to a tail gas treatment device, and the tail gas treatment device is used to treat the flue gas in the second treatment furnace tube; (b) the discharge port is connected to a slag discharge system, and the slag discharge system is used to cool the material discharged through the discharge port; (c) The furnace tube body is connected to a condensation system, and the condensation system is used to condense the oil and gas in the furnace tube body into liquid.

8. The double-layer rotary heating device according to claim 1, characterized in that: The second processing furnace tube and the furnace tube body are both hollow tubular structures with thin ends and thick middle. The middle position of the furnace tube body and the middle position of the second processing furnace tube are both arranged in the heating chamber; the furnace tube body and the second processing furnace tube are both provided with material transfer components.

9. An application method of the double-layer rotary heating device according to claim 7, characterized in that: The steps include: The material is transported to the second treatment furnace tube, the transmission system is started, and the temperature in the second treatment furnace tube is controlled at 100°C-430°C through the heating chamber, and the material is heated at this temperature for 1h-4h to remove moisture and smoke from the material; Open the discharge valve to allow the smoke-exhausted and dehumidified material to be transported to the furnace tube body, and control the temperature in the furnace tube body to 430°C-600°C through the heating chamber. Treat at this temperature for 3h-6h to crack the smoke-exhausted and dehumidified material; The cracked slag is discharged through the discharge port.

10. The application method of the double-layer rotary heating device according to claim 9, characterized in that: When the discharge port is connected to the slag discharge system, the cracked slag enters the slag discharge system and is collected after being cooled to room temperature; when the tail gas outlet is connected to the tail gas treatment device, the wet flue gas generated in the second treatment furnace tube can be discharged after being treated by the tail gas treatment device; When the furnace tube body is connected to a condensation system, the oil and gas generated during the cracking process can be condensed into liquid through the condensation system and temporarily stored in an oil storage tank.

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