Mixing agglutination granulation device

Abstract

The utility model relates to a mixing agglutination granulation device, and belongs to the technical field of rotary kiln granulation production. The granulation device comprises a preheating mixer, a granulation kiln and a cooling kiln which are sequentially arranged, the preheating mixer, the granulation kiln and the cooling kiln are sequentially connected through material conveying mechanisms, the granulation kiln comprises a rotary kiln body, a transverse spiral stirring mechanism is arranged in the rotary kiln body along the axis, and the spiral stirring mechanism is connected with the rotary kiln body. The two ends of the rotary kiln body are rotationally connected with a feeding cover and a discharging cover respectively, the two ends of the spiral stirring mechanism are connected with the feeding cover and the discharging cover through bearings respectively, and one end of the spiral stirring mechanism penetrates out of the rotary kiln body and is connected with the driving mechanism. According to the granulation device designed by the utility model, the rotary kiln type granulation kiln is used for replacing a traditional reaction kettle, so that the heating efficiency is high, and the granulation effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotary kiln granulation production technical field especially relates to a kind of with pitch as binder's carbon-based material's mix dynamic agglomeration granulation device. BACKGROUND

[0002] Binding granulation, as an important production process in chemical production, is the process of binding small particle base materials into large particles through specific binder, which can take advantage of the performance of small particles and the performance of large particles. For example, activated carbon uses starch, lignin or pitch as binder, and is bound into secondary porous particles after high-temperature treatment, which is used as adsorbent material; Alumina ceramic powder is formed into secondary particles with polyvinyl alcohol as binder, and is formed into dense ceramic material after high-temperature treatment at 1200℃, which is used for precision ceramic parts; Petroleum coke is formed into secondary particles with pitch as binder, and its compaction density can be improved after high-temperature treatment.

[0003] In actual production, the traditional granulation process usually mixes small particle base materials after crushing with binder, and performs granulation in a reaction kettle (vertical kettle or horizontal kettle), and then obtains the final granulation product through subsequent processes. However, the existing reaction kettle granulation process mainly has the following problems:

[0004] (1) The main thermal equipment, reaction kettle and cooling kettle, are intermittent operation equipment, and the processing capacity of a single device is low, and the labor cost is high;

[0005] (2) Due to the limitation of heat transfer, the processing capacity of a single device is small, and the production efficiency is low;

[0006] (3) During the granulation stage, the viscosity of the binder causes serious wall sticking in the equipment, which needs to be cleaned manually regularly, seriously affecting the production efficiency;

[0007] (4) The temperature of the material after granulation and roasting can reach a high temperature, and this part of heat is directly lost during cooling, causing waste of heat energy. SUMMARY

[0008] To solve the problems in the prior art, the utility model patent designs a mix dynamic agglomeration granulation device to solve the problem that the existing reaction kettle granulation process is not ideal.

[0009] The technical scheme adopted by the utility model is: the granulation device comprises a granulation kiln, the granulation kiln comprises a rotary kiln body, a transverse spiral stirring mechanism is arranged inside the rotary kiln body along the axis, a feed cover and a discharge cover are respectively rotatably connected to the two ends of the rotary kiln body, the two ends of the spiral stirring mechanism are connected with the feed cover and the discharge cover through bearings, and one end of the spiral stirring mechanism penetrates out of the rotary kiln body and is connected with a driving mechanism.

[0010] Furthermore, the granulation device also includes a preheating mixer and a cooling kiln. The preheating mixer is located upstream of the granulation kiln, and the cooling kiln is located downstream of the granulation kiln. The discharge port of the preheating mixer is connected to the inlet of the granulation kiln's feed hood via a rotary discharge valve and a chute. The discharge port of the granulation kiln is connected to the inlet of the cooling kiln via a conveyor.

[0011] Furthermore, the preheating mixer has a return port, and the discharge end of the granulation kiln is equipped with a return screw conveyor connected to the return port of the preheating mixer.

[0012] Furthermore, the spiral stirring mechanism includes a rotating shaft and a spiral ribbon. The two ends of the rotating shaft are connected to the feed hood and the discharge hood respectively through bearings. The rear end of the rotating shaft extends out of the discharge hood and is connected to a transmission gear. The output end of the drive motor of the drive mechanism is connected to a drive gear. The drive gear is connected to the transmission gear at the rear end of the rotating shaft through a chain.

[0013] Furthermore, the rotary kiln body is divided into three heating zones from front to back: a heating zone, a granulation zone, and a calcination zone. The heating temperature of the three heating zones increases sequentially. An overflow plate is provided inside the rotary kiln body between the granulation zone and the calcination zone.

[0014] Furthermore, the granulation device is equipped with a nitrogen protective gas system, which is connected by pipelines to the air inlets of the preheating mixer, the granulation kiln and the cooling kiln, and the air outlet pipelines of the three are combined and connected to the exhaust gas treatment system.

[0015] Furthermore, a cooling hood is rotatably connected to the outside of the cooling kiln body. A row of nozzles is provided on the top side of the inside of the cooling hood. The nozzle pipes are connected to the outlet of the circulating cooling water system. A drain outlet is provided at the bottom of the cooling hood. The drain outlet pipes are connected to the return water of the circulating cooling water system.

[0016] Furthermore, the preheating mixer has a horizontal structure, with a stirring mechanism arranged horizontally along the inside of the machine body, and its discharge port is located at the center of the bottom of the machine body.

[0017] Furthermore, a cooling jacket is provided on the outside of the return screw conveyor, and the cooling jacket pipeline is connected to a circulating cooling water system.

[0018] Compared with existing technologies, the advancements of this utility model patent's hybrid coagulation granulation device lie in:

[0019] The hybrid coagulation granulation device provided by this utility model consists of a split-type preheating mixer, a granulation kiln, and a cooling kiln connected in sequence, forming a continuous production process of material mixing, preheating, granulation, and cooling. It has high production efficiency and reduces energy consumption and time waste caused by intermittent operation. Under the same production capacity, it has a very significant reduction in construction cost and production energy consumption compared with traditional reaction kettle granulation equipment.

[0020] The granulation kiln adopts a rotary kiln structure, which provides good uniformity of material heating, high heat transfer efficiency, and improves thermal energy utilization.

[0021] The discharge end of the granulation kiln is equipped with a return screw conveyor to return some of the hot clinker to the preheating mixer. The mixing of clinker and raw materials avoids sticking to the inner wall of the equipment, realizing efficient recovery and recycling of heat energy.

[0022] The return screw conveyor is equipped with a cooling jacket to cool down the high-temperature clinker being conveyed, effectively controlling the temperature of the returned material and protecting the production equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a hybrid coagulation granulation device.

[0024] In the diagram, 1 is a preheating mixer, 2 is a granulation kiln, 3 is a cooling kiln, 4 is a return screw conveyor, 11 is a feed inlet, 12 is an exhaust port, 13 is a return port, 14 is a rotary discharge valve, 21 is a heating zone, 22 is a granulation zone, 23 is a roasting zone, 24 is a screw stirring mechanism, 25 is an overflow plate, 26 is a drive motor, 31 is a cooling hood, and 32 is a nozzle. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] like Figure 1 As shown, this utility model patent designs one embodiment of a hybrid agglomeration granulation device. In this embodiment, the granulation device includes a preheating mixer 1, a granulation kiln 2, and a cooling kiln 3 arranged sequentially. The preheating mixer 1 is located upstream of the granulation kiln 2, and the cooling kiln 3 is located downstream of the granulation kiln 2. The discharge port of the preheating mixer 1 is connected to the feed port of the granulation kiln 2 through a rotary discharge valve 14, a chute, etc., and the discharge port of the granulation kiln 2 is connected to the feed port of the cooling kiln 3 through a conveyor.

[0027] The preheating mixer 1 is a horizontal structure and uses electric heating. A stirring mechanism is arranged horizontally along the inside of the machine body. The discharge port is located at the bottom center of the machine body. The upper side of the machine body has a feed port 11, an exhaust port 12 and a return port 13 arranged in sequence.

[0028] The granulation kiln 2 is a rotary kiln structure. A transverse spiral stirring mechanism 24 is arranged inside the rotary kiln along the axis. The two ends of the rotary kiln are respectively rotatably connected to the feed hood and the discharge hood. The spiral stirring mechanism 24 includes a rotating shaft and a spiral belt. The two ends of the rotating shaft are respectively connected to the feed hood and the discharge hood through bearings. The rear end of the rotating shaft passes through the discharge hood and is connected to a transmission gear. The output end of the drive motor 26 of the drive mechanism is connected to a drive gear. The drive gear is connected to the transmission gear at the rear end of the rotating shaft through a chain, driving the stirring mechanism 24 to rotate.

[0029] The granulation kiln 2 has a feed inlet and an air inlet at the top of its feed hood. The feed inlet connects to the discharge port of the preheating mixer 1. The discharge hood has an air outlet at the top and a discharge port at the bottom. A distributor connects to the discharge port. Most of the produced clinker is conveyed to the cooling kiln 3, while a small portion of the clinker is sent back to the return port 13 of the preheating mixer 1 via a return screw conveyor 4, where it is reused for mixing and heating of the raw materials. A cooling jacket is installed on the outside of the return screw conveyor 4, and the cooling jacket piping is connected to a circulating cooling water system. The rotary kiln body of the granulation kiln 2 is divided into three heating zones from front to back: a heating zone 21, a granulation zone 22, and a calcination zone 23. The heating temperature of the three heating zones increases sequentially. An annular overflow plate is installed inside the rotary kiln body between the granulation zone 22 and the calcination zone 23.

[0030] Cooling kiln 3 also adopts a rotary kiln structure, with inlet and outlet hoods rotatably connected to both ends. Its inlet end is connected to the outlet of granulation kiln 2 via a conveyor. A cooling hood 31 is rotatably connected to the outer periphery of the cooling kiln 3. A row of nozzles 32 is installed on the top side inside the cooling hood 31, and a water outlet is opened at the bottom. The nozzles 32 are connected to the outlet of the circulating cooling water system through pipelines, and the outlet pipeline is connected to the inlet of the circulating cooling water system.

[0031] In addition, the entire agglomeration and granulation unit is equipped with a nitrogen protective gas system, which supplies nitrogen to the preheating mixer 1, granulation kiln 2, and cooling kiln 3 to provide a protective atmosphere for production. The exhaust ends of the three devices are connected to tail gas pipelines, which are then collected and connected to the tail gas purification and treatment system.

[0032] The hybrid agglomeration granulation device disclosed in this utility model patent is used in the granulation of carbon-based materials such as porous carbon, biomass carbon, and activated carbon. First, the raw materials of the carbon-based materials and an appropriate amount of asphalt binder are fed into a preheating mixer 1 for preliminary mixing. The preheating mixer 1 heats the mixed material to the temperature range where the asphalt begins to soften, typically below the softening point of the asphalt, approximately 200°C, to ensure that the mixture has suitable viscosity and flowability before entering the granulation kiln 2. The preheated and mixed material is discharged through a rotary discharge valve 14 at the discharge port and enters the granulation kiln 2 via a chute. The design of the rotary discharge valve 14 ensures that the material can be transferred continuously, uniformly, and unimpeded from the preheating mixer 1 to the granulation kiln 2. The internal structure of the valve body is designed to prevent material adhesion or blockage at high temperatures, ensuring smooth material flow.

[0033] The material is fed into granulation kiln 2, where it is first preheated in heating zone 21 at a temperature of 400-500℃ for 10-30 minutes. The material then moves to granulation zone 22, where the furnace temperature is controlled at 500-550℃. The residence time for the material in granulation is generally 1-4 hours, with an optimal granulation time of 2 hours. Finally, the material moves to calcination zone 23, where it undergoes high-temperature heat treatment to further volatilize its volatiles, thereby improving its structural stability and performance. During calcination, the material is heated to a high temperature in the rotary kiln, completing the particle solidification and improving the compactness of the carbon-based material, laying the foundation for the quality and performance of the final product. The roasted material is discharged through the discharge port of the discharge hood. Most of the clinker is transported to the cooling kiln 3, and a small portion of the clinker is sent back to the return port 13 of the preheating mixer 1 via the return screw conveyor 4, so that it can participate in the mixing and heating of the raw material as return material.

[0034] The cooling kiln 3 is responsible for gradually cooling the high-temperature material particles to a suitable temperature. The cooling kiln 3 sprays cooling water onto the kiln body through its external cooling hood 31. The water exchanges heat efficiently with the material particles through contact with the kiln wall, which can quickly reduce the temperature of the particles while maintaining the integrity of the particle structure and avoiding damage caused by thermal stress.

[0035] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the claims and description of the present invention shall still fall within the scope of the present invention.

Claims

1. A hybrid agglomeration granulation device, characterized in that, The granulation device includes a granulation kiln, which includes a rotary kiln body. A transverse spiral stirring mechanism is arranged inside the rotary kiln body along its axis. A feed hood and a discharge hood are rotatably connected to both ends of the rotary kiln body, respectively. Both ends of the spiral stirring mechanism are connected to the feed hood and the discharge hood through bearings, respectively. One end of the spiral stirring mechanism extends out of the rotary kiln body and is connected to a drive mechanism. The granulation device also includes a preheating mixer and a cooling kiln. The preheating mixer is located upstream of the granulation kiln, and the cooling kiln is located downstream of the granulation kiln. The discharge port of the preheating mixer is connected to the inlet of the granulation kiln's feed hood via a rotary discharge valve and a chute. The discharge port of the granulation kiln is connected to the inlet of the cooling kiln via a conveyor.

2. The hybrid coagulation granulation device according to claim 1, characterized in that, The preheating mixer has a return port, and the discharge end of the granulation kiln is equipped with a return screw conveyor connected to the return port of the preheating mixer.

3. The hybrid coagulation granulation device according to claim 2, characterized in that, The spiral stirring mechanism includes a rotating shaft and a spiral ribbon. The two ends of the rotating shaft are connected to the feed hood and the discharge hood respectively through bearings. The rear end of the rotating shaft passes through the discharge hood and is connected to a transmission gear. The output end of the drive motor of the drive mechanism is connected to a drive gear. The drive gear is connected to the transmission gear at the rear end of the rotating shaft through a chain.

4. The hybrid agglomeration granulation device according to claim 3, characterized in that, The rotary kiln body is divided into three heating zones from front to back: a heating zone, a granulation zone, and a calcination zone. The heating temperature of the three heating zones increases sequentially. An overflow plate is provided inside the rotary kiln body between the granulation zone and the calcination zone.

5. The hybrid agglomeration granulation device according to claim 4, characterized in that, The granulation device is equipped with a nitrogen protective gas system, which is connected by pipelines to the air inlets of the preheating mixer, the granulation kiln and the cooling kiln. The air outlet pipelines of the three are combined and connected to the exhaust gas treatment system.

6. The hybrid agglomeration granulation device according to claim 5, characterized in that, A cooling hood is rotatably connected to the outside of the cooling kiln body. A row of nozzles is installed on the top side of the inside of the cooling hood. The nozzles are connected to the outlet of the circulating cooling water system through pipes. A drain outlet is installed at the bottom of the cooling hood. The drain outlet pipe is connected to the return water end of the circulating cooling water system.

7. The hybrid agglomeration granulation device according to claim 6, characterized in that, The preheating mixer has a horizontal structure, with a stirring mechanism arranged horizontally along the inside of the machine body, and its discharge port is located at the center of the bottom of the machine body.

8. The hybrid agglomeration granulation device according to claim 7, characterized in that, The return screw conveyor is equipped with a cooling jacket on its outer side, and the cooling jacket pipeline is connected to a circulating cooling water system.

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