Gas-liquid composite cooling device for cooling in activated carbon production

Abstract

The invention discloses a gas-liquid composite cooling device for cooling in activated carbon production. The gas-liquid composite cooling device comprises a cooling device shell, a cooling roller, a cooling roller driving device and a cooling gas spraying assembly, end covers are fixed to the two ends of the cooling device shell, a thrust device supporting base is welded to the end cover on one side, and a driving gear motor supporting base is welded to the end cover on the other side. The anti-thrust device is fixed on the anti-thrust device supporting base and plays a role in supporting the cooling roller and limiting the activated carbon during conveying; the cooling roller driving device is fixed to the driving gear motor supporting base and used for driving the cooling roller to rotate at a constant speed. Cooling circulating water is arranged in the cooling roller and is used for cooling the activated carbon; the cooling gas spraying assembly penetrates through the cooling device shell and is used for cooling the activated carbon. The problems of low activated carbon cooling efficiency, reburning, dust pollution and the like in the activated carbon preparation process are solved.

Description

Technical Field

[0001] This invention relates to the field of activated carbon production technology, and in particular to a gas-liquid composite cooling device for cooling in activated carbon production. Background Technology

[0002] Activated carbon reaches a temperature of around 500℃ after activation and needs to be cooled to room temperature before packaging and storage. To avoid contamination from impurities, activated carbon with high performance requirements is usually pre-treated by a cooling conveyor, followed by thorough cooling using a drum screen or natural air cooling. However, this cooling method has problems such as low cooling efficiency, high dust pollution, and the risk of incomplete cooling leading to re-ignition of the activated carbon.

[0003] Therefore, how to design a cooling device that can rapidly cool activated carbon with high performance requirements to room temperature during the production process without reigniting has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a gas-liquid composite cooling device for cooling activated carbon production, which solves problems such as low cooling efficiency, reignition, and dust pollution during the activated carbon preparation process.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] A gas-liquid composite cooling device for cooling activated carbon production includes: a cooling device shell, a cooling drum, a cooling drum drive device, and a cooling gas jet assembly; the cooling device shell is fixed to both ends with end caps, one end cap is welded to a thrust device support base, and the other end is welded to a drive reduction motor support base; the thrust device is fixed on the thrust device support base and serves to support the cooling drum and limit the movement of activated carbon during transport; the cooling drum drive device is fixed on the drive reduction motor support base and is used to drive the cooling drum to rotate at a uniform speed; the cooling drum is equipped with circulating cooling water for cooling the activated carbon; the cooling gas jet assembly penetrates the cooling device shell and is used to cool the activated carbon.

[0007] Furthermore, the cooling device housing includes a cooling device bottom shell and a cooling device top cover, the cooling device top cover being fixed together with the cooling device bottom shell by bolts.

[0008] Furthermore, a feed inlet is provided on the top of one side of the cooling device cover, and a discharge nozzle is provided through the feed inlet. A double-layer pneumatic flap valve for the feed inlet is fixed at the top of the discharge nozzle. A discharge outlet is provided on the bottom of one side of the cooling device bottom shell, and a double-layer pneumatic flap valve for the discharge outlet is installed at the discharge outlet.

[0009] Furthermore, the cooling air jet assembly includes a cooling air inlet pipe, a cooling air outlet pipe, and multiple cooling air nozzles; the multiple cooling air nozzles are duckbill-shaped and are all fixedly installed on the bottom shell of the cooling device. The flat direction of the cooling air nozzles is consistent with the axis of the cooling drum, and the cooling air nozzles face the cooling drum at a certain angle; the other ends of all the cooling air nozzles converge on a branch pipe, and a cooling air inlet pipe is welded to the branch pipe to receive the cooling air supplied from the outside; a cooling air outlet pipe is welded to the top cover of the cooling device to collect the cooling air that has completed heat exchange inside the outer shell of the cooling device.

[0010] Furthermore, the cooling gas outlet pipe is connected in sequence to a dust collector and a heat exchanger before entering a circulating fan. After being compressed by the circulating fan, the cooling gas is transported back to the cooling gas inlet pipe, thus realizing the recycling of cooling gas.

[0011] Furthermore, the cooling drum includes a drum support and a screen, with the screen covering the drum support to form a barrel body; a feeding furnace head is fixed to one end face of the barrel body; a drive shaft is provided in the middle of the drum support, and hollow coupling one and hollow coupling two are connected to its two sides by flanges; hollow coupling two is installed on a thrust device to ensure that it can only rotate around the drum axis; the shaft of hollow coupling two is designed as a hollow stepped sleeve, with a solid flange welded to one end and a threaded inner hole machined at the other end, where a rotary joint is connected, and the rotary joint and the hollow sleeve form a sealed cavity to achieve sealed delivery of cooling water between the moving and stationary equipment; hollow coupling two is connected to the cooling drum drive device.

[0012] Furthermore, cooling coils are welded onto the shafts of both hollow coupling one and hollow coupling two, thus forming a cooling water circulation path for the cooling drum, so as to cool the activated carbon through heat conduction during the conveying process.

[0013] Furthermore, spiral conveying plates and lifting plates are alternately arranged on the inner side of the roller support along the spiral direction of the cooling coil; spiral conveying plates are uniformly welded on the inner wall of the feeding furnace head.

[0014] Beneficial effects:

[0015] This invention provides a gas-liquid composite cooling device for cooling activated carbon production. It adopts a gas-liquid two-phase composite cooling method in a relatively sealed device to solve the problem of activated carbon spontaneously combusting when it comes into contact with oxygen during the cooling process, which causes uncontrolled cooling effect and prolonged cooling time. This allows the activated carbon to be thoroughly cooled in a limited space and time, and prevents the situation where the outer layer of the activated material is cooled but the inside still has residual heat, which can cause the activated material to reignite after piling up. It also solves the need for secondary natural cooling in the later stage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the cooling drum structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the cooling gas nozzle layout of the present invention.

[0019] In the figure:

[0020] 1. Double-layer pneumatic flap valve at the feed inlet; 2. Feed nozzle; 3. Thrust device; 4. Rotary joint; 5. Cooling water inlet pipe; 6. Hollow coupling II; 7. Thrust device support base; 8. Cooling device bottom shell; 9. Cooling air inlet pipe; 10. Double-layer pneumatic flap valve at the discharge port; 11. Drive geared motor support base; 12. Cooling water outlet pipe; 13. Drive geared motor; 14. Cooling device top cover; 15. Cooling air outlet pipe; 16. Drum support; 17. Screen; 18. Screw conveyor plate; 19. Lifting plate; 20. Feeding furnace head; 21. Hollow coupling I; 22. Cooling coil; 23. Cooling drum; 24. Cooling air nozzle. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Reference Appendix Figure 1 This invention discloses a gas-liquid composite cooling device for cooling activated carbon production, comprising: a cooling device shell, a cooling drum 23, a cooling drum drive device, and a cooling gas jet assembly; the cooling device shell has end caps fixed at both ends by bolts, one end cap is welded to a thrust device support base 7, and the other end cap is welded to a drive reduction motor support base 11; the thrust device 3 is fixed to the thrust device support base 7 by bolts, serving to support the cooling drum 23 and limit the movement of activated carbon; the cooling drum drive device is fixed to the drive reduction motor support base 11 by bolts, and is used to drive the cooling drum 23 to rotate at a uniform speed; the cooling drum 23 is provided with cooling circulating water for cooling the activated carbon; the cooling gas jet assembly penetrates the cooling device shell and is used to cool the activated carbon. The cooling drum drive device uses a drive reduction motor 13, which drives the cooling drum 23 to rotate at a uniform speed through a chain and sprocket connection.

[0023] The cooling device housing includes a cooling device bottom shell 8 and a cooling device top cover 14, and the cooling device top cover 14 is fixed together with the cooling device bottom shell 8 by bolts.

[0024] To further optimize the technical solution, a feed inlet is provided on the top of one side of the cooling device cover 14, and a discharge nozzle 2 is provided through the feed inlet so that the discharge nozzle 2 can pass smoothly through and extend into the feeding furnace head 20 to achieve smooth feeding of pre-cooled activated carbon. A double-layer pneumatic flap valve 1 is fixed at the top of the discharge nozzle 2, and the activated carbon is discharged by alternating opening and closing control, so as to prevent air from entering the interior of the cooling device as much as possible. A discharge outlet is provided on the bottom of one side of the cooling device bottom shell 8, and a double-layer pneumatic flap valve 10 is installed at the discharge outlet.

[0025] refer to Figure 3 The cooling gas jet assembly includes a cooling gas inlet pipe 9, a cooling gas outlet pipe 15, and multiple cooling gas nozzles 24. The multiple cooling gas nozzles 24 are duckbill-shaped and fixedly mounted on the bottom shell 8 of the cooling device. The flat direction of the cooling gas nozzles 24 is aligned with the axis of the cooling drum 23, and the nozzles 24 face the cooling drum 23 at a certain angle, ensuring that the cooling gas sprayed by the nozzles can directly act on the activated carbon to be cooled, ensuring that the forced-flowing cooling gas completes heat exchange with the activated carbon as quickly as possible. The other ends of all the cooling gas nozzles 24 converge onto a branch pipe, on which a cooling gas inlet pipe 9 is welded to receive externally supplied cooling gas. The cooling device cover 14 is welded with a cooling gas outlet pipe 15 for collecting the cooling gas that has completed heat exchange inside the cooling device shell. The cooling gas circuit is designed with a bottom-in, top-out pattern, which, in addition to following aerodynamic principles to reduce flow resistance, is also to better handle the dust impact caused by forced cooling.

[0026] To further optimize the technical solution, the cooling gas outlet pipe 15 is sequentially connected to a dust collector and a heat exchanger before entering a circulating fan. After compression by the circulating fan, the gas is again delivered to the cooling gas inlet pipe 9, achieving the recycling of the cooling gas. Initially, the cooling gas is atmospheric and contains oxygen. When exchanging heat with the not-yet-fully-cooled activated carbon, the oxygen reacts with some of the still-high-temperature activated carbon to produce carbon dioxide and release heat, thus reducing the oxygen content of the circulating cooling gas. After a period of operation, the recycled cooling gas will no longer contain oxygen, and its components will no longer react chemically with the activated carbon, ensuring the stability of the cooling effect and quality of the activated carbon during subsequent continuous cooling.

[0027] refer to Figure 2The cooling drum 23 includes a drum support 16 and a screen 17. The screen 17 covers the drum support 16 to form a barrel body. A feed furnace head 20 is fixed to one end face of the barrel body by bolt connection. A drive shaft is set in the middle of the drum support 16. Hollow coupling 1 21 and hollow coupling 2 6 are connected to its two sides by flanges. Hollow coupling 2 6 is installed on the thrust device 3 and ensures that it can only rotate around the drum axis. The shaft of hollow coupling 2 6 is designed as a hollow stepped sleeve. A solid flange is welded to one end, and a threaded inner hole is machined at the other end. A rotary joint 4 is connected to the threaded inner hole. The rotary joint 4 and the hollow sleeve form a sealed cavity. The rotary joints 4 on both sides are respectively connected to a cooling water inlet pipe 5 and a cooling water outlet pipe 12 to realize the sealed transportation of cooling water between the moving and stationary equipment. Hollow coupling 2 6 is connected to the cooling drum drive device for transmission.

[0028] To further optimize the technical solution, cooling coils 22 are welded onto the shafts of both hollow coupling 1 21 and hollow coupling 2 6, thereby forming a cooling water circulation path for the cooling drum 23, so as to cool the activated carbon through heat conduction during the conveying process.

[0029] To further optimize the technical solution, spiral conveying plates 18 and lifting plates 19 are alternately arranged on the inner side of the roller support 16 along the spiral direction of the cooling coil 22; spiral conveying plates 18 are uniformly welded on the inner wall of the feeding head 20. The pre-cooled activated carbon enters the feeding head 20 of the cooling roller 23 through the double-layer pneumatic flap valve 1 at the inlet and along the discharge nozzle 2. The rotation of the cooling roller 23 drives the feeding head 20 to rotate, and its spiral conveying plates 18 convey the activated carbon to the back of the barrel. The cooling coil 22 and the spiral conveying plates 18 complete the slow conveying of the material. The cooling air and the cooling coil 22 together complete the cooling requirements of the activated carbon. Finally, the activated carbon pushed to the outlet completes the discharge through the double-layer pneumatic flap valve 10 at the outlet.

[0030] This invention provides a gas-liquid composite cooling device for activated carbon production. It employs a two-phase gas-liquid composite cooling method within a relatively sealed device, solving the problems of spontaneous combustion of activated carbon upon contact with oxygen during cooling, which can lead to uncontrolled cooling and prolonged cooling time. This allows for thorough cooling of the activated carbon within a limited space and time, preventing reignition of the activated carbon after the outer layer has cooled but the interior remains hot, and eliminating the need for secondary natural cooling. Compared to cooling methods that directly spray water onto the activated carbon for rapid cooling, this invention eliminates secondary pollution of the activated carbon caused by spraying water, reduces water consumption, and eliminates the need for secondary drying, thus reducing energy consumption. Compared to cooling methods using drum screens or natural air drying on the ground, it solves the problems of dust pollution, large footprint, and low efficiency, demonstrating excellent results in the preparation of high-quality activated carbon.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas-liquid composite cooling device for cooling of activated carbon production, characterized by include: The cooling device comprises a housing, a cooling drum, a cooling drum drive unit, and a cooling gas jet assembly. The housing has end caps fixed at both ends; one end cap is welded to a thrust device support base, and the other end cap is welded to a drive reduction motor support base. The thrust device is fixed to the thrust device support base and serves to support the cooling drum and limit the movement of activated carbon during transport. The cooling drum drive unit is fixed to the drive reduction motor support base and is used to drive the cooling drum to rotate at a uniform speed. Cooling circulating water is installed inside the cooling drum to cool the activated carbon. The cooling gas jet assembly penetrates the cooling device housing and is used to cool the activated carbon.

2. The gas-liquid composite cooling device for cooling of activated carbon production according to claim 1, characterized in that, The cooling device housing includes a cooling device bottom shell and a cooling device top cover, and the cooling device top cover is fixed together with the cooling device bottom shell by bolts.

3. The gas-liquid composite cooling device for cooling of activated carbon production according to claim 2, characterized in that, A feed inlet is provided on the top of one side of the cooling device cover, and a discharge nozzle is provided through the feed inlet. A double-layer pneumatic flap valve for the feed inlet is fixed at the top of the discharge nozzle. A discharge outlet is provided on the bottom of one side of the cooling device bottom shell, and a double-layer pneumatic flap valve for the discharge outlet is installed at the discharge outlet.

4. The gas-liquid composite cooling device for cooling of activated carbon production according to claim 3, characterized in that, The cooling air jet assembly includes a cooling air inlet pipe, a cooling air outlet pipe, and multiple cooling air nozzles. The multiple cooling air nozzles are duckbill-shaped and are all fixedly installed on the bottom shell of the cooling device. The flat direction of the cooling air nozzles is consistent with the axis of the cooling drum, and the cooling air nozzles face the cooling drum at a certain angle. The other ends of all the cooling air nozzles converge on a branch pipe, and a cooling air inlet pipe is welded to the branch pipe to receive the cooling air supplied from the outside. A cooling air outlet pipe is welded to the top cover of the cooling device to collect the cooling air that has completed heat exchange inside the outer shell of the cooling device.

5. The gas-liquid composite cooling device for cooling of activated carbon production according to claim 4, characterized in that, The cooling gas outlet pipe is connected in sequence to a dust collector and a heat exchanger before entering a circulating fan. After being compressed by the circulating fan, the cooling gas is transported back to the cooling gas inlet pipe, thus realizing the recycling of cooling gas.

6. A gas-liquid composite cooling device for cooling activated carbon production according to claim 1 or 5, characterized in that, The cooling drum includes a drum support and a screen, with the screen covering the drum support to form a barrel body. A feed furnace head is fixed to one end face of the barrel body. A drive shaft is located in the middle of the drum support, and hollow coupling one and hollow coupling two are connected to its two sides by flanges. Hollow coupling two is mounted on a thrust device to ensure that it can only rotate around the drum axis. The shaft of hollow coupling two is designed as a hollow stepped sleeve, with a solid flange welded to one end and a threaded inner hole machined at the other end. A rotary joint is connected to the threaded inner hole, and the rotary joint and the hollow sleeve form a sealed cavity to achieve a sealed supply of cooling water between the moving and stationary equipment. Hollow coupling two is connected to the cooling drum drive device.

7. A gas-liquid composite cooling device for cooling activated carbon production according to claim 6, characterized in that, Cooling coils are welded onto the shafts of both hollow coupling one and hollow coupling two, thus forming a cooling water circulation path for the cooling drum, so as to cool the activated carbon through heat conduction during the conveying process.

8. The gas-liquid composite cooling device for cooling activated carbon production according to claim 7, characterized in that, The inner side of the roller support is alternately arranged with spiral conveying plates and lifting plates along the spiral direction of the cooling coil; the inner wall of the feeding furnace head is uniformly welded with spiral conveying plates.

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