Cooling device for dried organic solid materials

Abstract

The utility model relates to a cooling device for dried organic solid materials, which comprises a cooling box (I) and a mixing tank (II), the cooling box (I) comprises a box body (1), a jacket (2), a chain wheel (3), a scraper (4), a chain (5), a pulley (6) and a chain motor (7), the mixing tank (II) comprises a tank body (8), a mixing motor (9), a stirring blade (10) and an insertion plate (11), an outlet of the cooling box (I) is communicated with an inlet of the mixing tank (II), and the mixing tank (II) is communicated with the jacket (2). And a jacket (2) for introducing cooling water is arranged on the outer side of the bottom of the cooling box (1). A neutral gear is arranged between the two chains in the cooling box, materials can directly fall into the box bottom, the scraper plate made of copper plates pushes the materials to move forwards and are cooled by jacket cooling water, and the cooled organic solid materials enter the material mixing tank to be crushed and subjected to temperature uniformization. The device is suitable for cooling organic solid materials with adhesion, the cooling effect is good, and the cooling process is safe and environmentally friendly.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment, and in particular to a cooling device for dried organic solid materials. Background Technology

[0002] In the deep processing of coal tar wash oil and anthracene oil, some solid products require solvent crystallization refining, such as fluorene, oxyfluorene, anthracene, and carbazole. The solvents are generally toluene, xylene, etc. After crystallization refining, the product is filtered or centrifuged to obtain organic solid materials of acceptable purity. These organic solid materials need to be vacuum dried in a dryer or dryer to remove residual solvents before obtaining the finished product. The drying temperature is generally 100℃~150℃. The dried finished product needs to be cooled before packaging and warehousing.

[0003] Currently, the common cooling method is natural cooling, which involves spreading the material on a clean surface or in a large, shallow trough, and then manually weighing, packaging, and storing it after it cools to room temperature. While simple, this method is slow, has solvent evaporation issues, creates a poor indoor environment, and is difficult to automate in terms of weighing and packaging, resulting in low efficiency. Another cooling method is air cooling, with various air cooling devices available. However, air cooling generates a lot of dust, requiring dust recovery equipment. Furthermore, the solid materials from deep processing of coal tar are all organic solids, and the solvents used for drying and crystallization are also organic solvents. Blowing in air at high temperatures is extremely dangerous and unsafe, while blowing in nitrogen is too costly.

[0004] Water cooling offers rapid and efficient cooling, allows for closed-loop operation, and is safe and environmentally friendly, making it suitable for cooling dried organic solid materials. Utility model patent CN202902929U discloses a solid material cooling device. This device includes cooling components composed of several spaced cooling frames. Each frame contains baffles, and the inner wall of the frame has mixing points formed by cylindrical or conical protrusions. Each frame has a coolant inlet and outlet, and the distance between two sets of cooling frames serves as a material particle channel. A vibration mechanism is located at the bottom. However, this utility model does not disclose the spacing and vertical length of the cooling frames. Too large a spacing results in poor cooling of the material in the middle, while too small a spacing makes material settling difficult, especially for adhesive solids. A short vertical length leads to short material contact time and poor cooling, while a large vertical length results in a large device size, high cost, and large space requirements. Materials such as fluorene, oxyfluorene, anthracene, and carbazole have certain adhesive properties and are unsuitable for this type of cooling equipment. Utility model patent CN209588720U discloses a solid material cooling device that uses a jacketed auger. Cooling water circulates through the jacket to cool the high-temperature material inside the auger. The auger has a certain length to ensure effective cooling. The auger conveys the material by rotating spiral blades, pushing it along the shell to the outlet. However, for materials with a certain degree of adhesion, the spiral blades can easily become stuck to the shell, affecting conveying. Maintenance requires removing the entire spiral blade, which is inconvenient. Furthermore, augers are unsuitable for conveying materials that easily clump together, and their conveying capacity is smaller compared to scraper conveyors. The strong compression generates heat, which is unsafe for organic materials. Materials such as fluorene, oxyfluorene, anthracene, and carbazole are also unsuitable due to their adhesiveness and tendency to clump. Summary of the Invention

[0005] The purpose of this invention is to provide a cooling device for dried organic solid materials. It is suitable for cooling adhesive and easily agglomerated organic solid materials that have undergone solvent crystallization refining and drying during the deep processing of coal tar wash oil and anthracene oil. Examples include cooling devices for solvent-refined and dried materials such as fluorene, oxyfluorene, anthracene, and carbazole. This device is suitable for processing materials with a certain degree of adhesiveness and features good cooling effect, large processing capacity, closed and pollution-free operation, and simple maintenance.

[0006] The device consists of a cooling tank (Ⅰ) and a mixing tank (Ⅱ). The cooling tank (Ⅰ) is composed of a tank body (1), a jacket (2), a sprocket (3), a scraper (4), a chain (5), a pulley (6), and a chain motor (7). The mixing tank (Ⅱ) is composed of a tank body (8), a mixing motor (9), a stirring blade (10), and a baffle plate (11). The device is characterized by the outlet of the cooling tank (Ⅰ) being connected to the inlet of the mixing tank (Ⅱ), and the cooling tank (Ⅰ) having an outer jacket (2) for cooling water circulation. (See...) Figure 1Inside the cooling box (Ⅰ), there are two chains on the left and right sides, with a gap between them, allowing materials to fall directly into the bottom of the box. Angle iron is welded to the outer side of the horizontal chain links of the two chains (5), and a scraper (4) made of 5mm to 10mm thick copper plate is bolted to the angle iron. The scraper (4) has a forward tilt angle of 10° to 15°. See Figure 2 The sprocket (3) is made of copper, and the pulley (6) is made of heat-resistant plastic. The stirring blade (10) inside the mixing tank (II) is attached to the inner wall of the tank, and the stirring blade (10) is made of 5mm to 10mm thick polytetrafluoroethylene plate.

[0007] The dried high-temperature organic solid material enters the cooling box through the inlet. There is a gap between the left and right parallel chains, and the material falls directly to the bottom of the box. The width of the cooling box is 0.5m to 0.8m, the length is 10m to 15m, and the slope is 0° to 45°. The chain motor drives the chain to rotate. Due to gravity, the scraper is in contact with the bottom of the box. The scraper has a forward tilt angle of 10° to 15°, which drives the high-temperature material falling to the bottom of the box to move forward. Cooling water is circulated in the outer jacket of the bottom of the box. The high-temperature material is continuously cooled during the forward movement. The distance between each scraper is 0.4m to 0.6m. The speed of the chain motor is adjusted by the frequency converter, thereby controlling the forward speed of the material to achieve the cooling effect. The scraper pushes the cooled material to the outlet of the cooling box. The outlet of the cooling box is connected to the inlet of the mixing tank. The material enters the mixing tank from the cooling box. The scraper returns through the pulley. The pulley shafts (12) are close together by 0.8m to 1m. There is a temperature difference between the upper and lower layers of the material being cooled in the cooling box. The stirring in the mixing tank makes the material temperature uniform and also plays a role in further cooling. The cooled material is discharged from the outlet of the cooling box, weighed, and packaged. The baffle plate can control the discharge speed. The PTFE plate of the stirring blade is bolted to the stirring shaft.

[0008] This device has the following advantages:

[0009] (1) Continuous operation, large processing capacity, and high degree of automation. The cooling box can be made into a suitable size according to the amount of high-temperature solid material to be cooled; the dried materials from multiple dryers can enter the cooling box simultaneously or sequentially; the cooled material exiting the mixing tank can be automatically weighed and packaged.

[0010] (2) Closed operation, no pollution. The box has a cover plate, and the mixing tank is also a closed container. The entire cooling process is carried out in a closed manner. There is an interface on the top of the mixing tank that connects to the environmental protection device to treat a small amount of waste gas and dust.

[0011] (3) It has good safety and can handle organic materials. The scraper is made of copper plate, which will not spark when it rubs against the iron plate at the bottom of the tank; the pulley is made of heat-resistant plastic material, which will not spark when it rubs against the chain; the stirring blade of the mixing tank is made of PTFE plate, which will not spark when it rubs against the iron plate on the tank wall.

[0012] (4) Easy to manufacture and maintain. The box is rectangular, which is easy to manufacture; the iron chains, pulleys and sprockets used are all conventional parts, which are easy to purchase; the scraper, chain and pulley and other parts can be repaired by opening the cover, which is convenient for maintenance.

[0013] (5) Suitable for processing adhesive materials. Many dried high-temperature organic solid materials have a certain degree of adhesiveness and are prone to clumping, such as fluorene, oxyfluorene, anthracene, and carbazole, which are products of deep processing of coal tar. These adhesive materials tend to adhere to the box wall, making them difficult to feed or to the spiral blades of the auger, causing blockage. The scraper of this device has a forward tilt angle of 10° to 15°, which can effectively scrape the material forward. If one scraper does not scrape thoroughly, the next scraper will continue to scrape the material and push it forward until the material is clean. At the same time, because the material is adhesive, it will not scatter, which is conducive to the stacking and pushing. The scraper and the bottom of the box are attached by gravity. Once the material adheres too firmly to the bottom of the box, the scraper will automatically pass over the material, and the next scraper will continue to scrape the material. The drying process will not be interrupted, and the scraper and the bottom of the box will not generate heat from the organic material due to strong friction, which would cause danger.

[0014] (6) Good cooling effect and uniform temperature. During the cooling process, there is an uneven temperature between the upper and lower layers. The bottom layer, which is closer to the cooling water, has a better cooling effect, while the upper layer has a slightly worse effect. When there are lumps, the internal temperature of the lumps is slightly higher. In the mixing tank, the temperature of the material is made uniform by stirring, and the lumps are also broken up. Stirring also plays a role in natural cooling. The stirring blades are in close contact with the tank wall, avoiding adhesion and facilitating material discharge. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a cooling device for dried organic solid materials.

[0016] In the diagram, Ⅰ-cooling box, Ⅱ-mixing tank, 1-box body, 2-jacket, 3-sprocket, 4-scraper, 5-chain, 6-pulley, 7-chain motor, 8-tank body, 9-mixing motor, 10-stirring blade, 11-insertion plate.

[0017] Figure 2 These are enlarged top and side views of the cooling box.

[0018] In the diagram, 12 represents the pulley shaft. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Reference Figure 1The present invention describes a cooling device for dried organic solid materials. The device consists of a cooling box (Ⅰ) and a mixing tank (Ⅱ). The cooling box (Ⅰ) comprises a box body (1), a jacket (2), a sprocket (3), a scraper (4), a chain (5), a pulley (6), and a chain motor (7). The mixing tank (Ⅱ) comprises a tank body (8), a mixing motor (9), a stirring blade (10), and a baffle plate (11). The outlet of the cooling box (Ⅰ) and the inlet of the mixing tank (Ⅱ) are connected. The bottom of the cooling box (Ⅰ) has a jacket (2) for cooling water circulation. (See...) Figure 1 Inside the cooling box (Ⅰ), there are two chains on the left and right sides, with a gap between them, allowing the material to fall directly to the bottom of the box. Angle irons are welded to the outer sides of the horizontal links of the two chains (5), and scrapers (4) made of copper plates are bolted to the angle irons. The scrapers (4) have a forward tilt angle of 10° to 15°. See Figure 2 The sprocket (3) is made of copper, and the pulley (6) is made of heat-resistant plastic. The stirring blade (10) inside the mixing tank (II) is attached to the inner wall of the tank, and the stirring blade (10) is made of 5mm to 10mm thick polytetrafluoroethylene plate.

[0021] Taking carbazole as an example, the solvent for crystallization and purification is mixed xylene, the drying temperature is 120℃, and the drying time is 3m. 3 Vacuum drying using a rake dryer produces 1200 kg of carbazole product at 120℃. First, the cooling water circulation pump is started, with cooling water entering from the bottom and exiting from the top, at an inlet temperature of 25℃. Then, the chain motor is started, with the scraper running at a speed of 5 m / min. The dryer outlet is opened, and the high-temperature carbazole is fed into the cooling tank at a rate of 3 t / h, completing the feeding within 24 minutes. The material falls to the bottom of the cooling tank and is propelled forward by the scraper, continuously cooled by the cooling water on the outside of the tank bottom during this process. The outlet temperature of the cooling water rises to 30℃. The carbazole exiting the cooling tank is cooled to 32℃ and enters the mixing tank. Before entering the mixing tank, the mixing motor is started to activate the agitator at a speed of 20 r / min, breaking up the material pieces, homogenizing the temperature, and further reducing the material temperature to 28℃. The material is then discharged, weighed, and packaged, completing the cooling process.

Claims

1. A cooling device for dried organic solid materials, the device comprising a cooling box (Ⅰ) and a mixing tank (Ⅱ), the cooling box (Ⅰ) comprising a box body (1), a jacket (2), a sprocket (3), a scraper (4), a chain (5), a pulley (6) and a chain motor (7), the mixing tank (Ⅱ) comprising a tank body (8), a mixing motor (9), a stirring blade (10) and a baffle plate (11), characterized in that... The outlet of the cooling tank (Ⅰ) is connected to the inlet of the mixing tank (Ⅱ), and there is a jacket (2) for cooling water to pass through the bottom outside of the cooling tank (Ⅰ).

2. The apparatus for cooling organic solid material according to claim 1, wherein There are two chains on the left and right sides inside the cooling box (Ⅰ), with a gap between the two chains, so that the material can fall directly into the bottom of the box. Angle iron is welded to the outside of the horizontal chain links of the two chains (5), and a scraper (4) made of copper plate is bolted to the angle iron. The scraper (4) has a forward tilt angle of 10° to 15°. The sprocket (3) is made of metal copper, and the pulley (6) is made of heat-resistant plastic.

3. The apparatus for cooling organic solid material according to claim 1, wherein The stirring blade (10) inside the mixing tank (II) is attached to the inner wall of the tank. The stirring blade (10) is made of 5mm to 10mm thick polytetrafluoroethylene plate.

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