Discharging device for DOPO finished product

Abstract

The utility model discloses a DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) finished product discharging device which comprises a water washing kettle, a heat preservation pipeline and a rotary drum type heat preservation pipeline, a discharging port of a rotary drum type cold condensing machine is connected with a feeding end of a spiral crushing blanking device, and a discharging end of the spiral crushing blanking device is connected with a drying machine. The materials in the water washing kettle are conveyed to a rotary drum type cold condensation flaking machine through a heat preservation pipeline to be subjected to cold condensation flaking and stripped off, and after the materials enter a spiral crushing feeder and are crushed to reach the set size, the materials enter a drying machine to be dried until the moisture of products reaches the standard. According to the discharging device, the problems that DOPO materials are high in freezing point, large in hardness and difficult to discharge are effectively solved, the discharging time is shortened, the labor intensity of workers is reduced, and the production efficiency of DOPO is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of DOPO production devices, and particularly relates to a DOPO finished product discharging device. Background Art

[0002] 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) is a new type of green and environmentally friendly halogen-free phosphorus-containing flame retardant, which has the characteristics of high efficiency, less smoke, low toxicity, non-migration, and long-lasting flame retardant performance. Its melting point is 117.0°C - 120.0°C. Below the melting point, it will quickly crystallize and solidify to form a high-hardness solid. Once a solid is formed, due to its excessive hardness, a large amount of manpower and material resources will be consumed for crushing, and the thickness and strength of the crystal flakes cannot be guaranteed, resulting in uneven product quality. Therefore, it is very necessary to study a DOPO finished product discharging device so that the DOPO finished product forms a solid with uniform width and thickness during crystallization, which is convenient for the unified product specifications of the packaging box. Summary of the Utility Model

[0003] Aiming at the above problems, the purpose of the utility model is to provide a DOPO finished product discharging device.

[0004] The specific technical solutions are as follows:

[0005] A DOPO finished product discharging device includes a water washing kettle, a heat preservation pipeline, a drum type condensation flaker, a spiral crushing feeder and a dryer. The water washing kettle and the drum type condensation flaker are connected through the heat preservation pipeline. The discharging port of the drum type condensation flaker is connected to the feeding port of the spiral crushing feeder, and the discharging port of the spiral crushing feeder is connected to the dryer.

[0006] Further, the heat preservation pipeline is provided with a sandwich layer, and a heating medium is arranged in the sandwich layer. The ratio of the inner diameter of the heat preservation pipeline to the thickness of the sandwich layer is 2 - 3.2:1, and saturated steam is used, with a temperature of 120 - 125°C.

[0007] Further, the drum type condensation flaker includes a box body, in which a feeding distributor, a concave lower dipping device, a drum and a scraper structure are arranged. The drum is driven by a motor driving device to rotate in the box body. The feeding distributor for spraying the liquid material onto the drum is located above the side of the drum. The concave lower dipping device for collecting the liquid material is located below the drum and the feeding distributor, and is used to receive the excess sprayed liquid. The scraper structure for peeling off the solidified material on the drum is fixed to one side of the drum by a bracket, with the upper end in contact with the drum. At the same time, the scraper structure is located at the discharging port of the drum type condensation flaker to ensure that the peeled-off material directly discharges from the discharging port.

[0008] Further, a cooling water circulation pipeline is arranged inside the drum to cool the liquid material sprayed on the drum, so that it solidifies on the surface of the drum.

[0009] Further, the feeding distributor is conical and is provided with a liquid flow channel inside, and the aperture of the channel is 5-10 mm.

[0010] Further, the distance between the rotating drum and the bottom of the concave downward dipping device is maintained at 10-15 cm to leave space for the rotation of the rotating drum.

[0011] The beneficial effects of the present utility model are as follows:

[0012] The DOPO discharging device provided by the present utility model can continuously and stably output qualified solid materials of a specific size from the molten semi-fluid DOPO material under the cooperation of components such as a heat preservation pipeline, a condensation flaker, and a spiral crusher, according to the problem that DOPO has a high freezing point and will quickly crystallize into a high-hardness crystalline solid when reaching the freezing point, resulting in pipeline blockage and being impossible to clean. The operation process is simple, the working efficiency of the equipment is high, the discharging continuity is good, and the product has strong applicability. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a side view sectional schematic diagram of a drum-type condensation flaker.

[0015] In the figure: 1, water washing kettle; 2, heat preservation pipeline; 3, drum-type condensation flaker; 31, box body; 32, feeding distributor; 33, concave downward dipping device; 34, rotating drum; 35, scraper structure; 4, spiral crushing and discharging device; 5, dryer. Detailed Embodiments

[0016] The present utility model will be further described below in conjunction with the drawings of the specification, but the protection scope of the present utility model is not limited thereto.

[0017] As Figure 1 shown, a DOPO finished product discharging device includes a water washing kettle 1, a heat preservation pipeline 2, a drum-type condensation flaker 3, a spiral crushing and discharging device 4, and a dryer 5. The water washing kettle 1 and the drum-type condensation flaker 3 are connected through the heat preservation pipeline 2. A sandwich is provided outside the heat preservation pipeline 2, and a heating medium is provided inside the sandwich. The ratio of the inner diameter of the heat preservation pipeline 2 to the thickness of the sandwich is 2-3.2:1. The discharging port of the drum-type condensation flaker 3 is connected to the feeding port of the spiral crushing and discharging device 4, and the discharging port of the spiral crushing and discharging device 4 is connected to the dryer 5.

[0018] As Figure 2As shown in the figure, the drum-type condensation flaker 3 includes a box body 31. Inside the box body 31, there are a feeding distributor 32, a concave bottom dipping device 33, a drum 34 and a scraper structure 35. The feeding distributor 32 for spraying the liquid material onto the drum 34 is located above the side of the drum 34. The concave bottom dipping device 33 for collecting the liquid material is located below the drum 34 and the feeding distributor 32. The scraper structure 35 for stripping the solidified material on the drum 34 is located on one side of the drum 34, with its upper end in contact with the drum 34. At the same time, the scraper structure 35 is located at the discharge port of the drum-type condensation flaker 3. There is a cooling water circulation pipeline inside the drum 34. The feeding distributor 32 is conical and is provided with a liquid material circulation passage with a pore diameter of 5-10 mm.

[0019] After the high-temperature molten liquid material in the water washing kettle 1 is qualified, it enters the feeding distributor 32 through the heat preservation pipeline 2. By adopting the method of heating with supersaturated steam, the temperature inside the heat preservation pipeline 2 is maintained at 125 °C. The feeding distributor 32 sprays the liquid material onto the drum 34, and the excess liquid material flows into the concave bottom dipping device 33. The rotation speed of the drum 34 is 5 rpm / min, and the distance between the drum 34 and the concave bottom dipping device 33 is kept at 10-15 cm. 20 °C cooling water flows through the inside of the drum 34. The liquid material sprayed onto the drum 34 is cooled and solidified. The scraper structure 35 strips the solidified material from the surface of the drum 34. The stripped material enters the spiral crushing and blanking device 4 from the discharge port of the drum-type condensation flaker 3. The crushed material enters the dryer 5 through the feeding pipeline and is dried by blowing at 105 °C and then packaged.

Claims

1. A finished product discharging device for DOPO, characterized in that, It includes a water-washing kettle (1), a heat-insulating pipeline (2), a drum-type condensation flaker (3), a spiral crushing feeder (4) and a dryer (5). The water-washing kettle (1) is connected to the drum-type condensation flaker (3) through the heat-insulating pipeline (2). The discharge port of the drum-type condensation flaker (3) is connected to the feed port of the spiral crushing feeder (4), and the discharge port of the spiral crushing feeder (4) is connected to the dryer (5).

2. The DOPO finished product discharging device according to claim 1, wherein, The heat-insulating pipeline (2) is provided with an interlayer outside, and a heating medium is provided in the interlayer. The ratio of the inner diameter of the heat-insulating pipeline (2) to the thickness of the interlayer is 2 - 3.2:

1.

3. The DOPO finished product discharging device according to claim 1, wherein The drum-type condensation flaker (3) includes a box body (31). Inside the box body (31), there are a feeding distributor (32), a concave-type dipping feeder (33), a drum (34) and a scraper structure (35). The feeding distributor (32) for spraying the liquid material onto the drum (34) is located above the side of the drum (34). The concave-type dipping feeder (33) for collecting the liquid material is located below the drum (34) and the feeding distributor (32). The scraper structure (35) for peeling off the solidified material on the drum (34) is located on one side of the drum (34), with the upper end in contact with the drum (34). At the same time, the scraper structure (35) is located at the discharge port of the drum-type condensation flaker (3).

4. The DOPO finished product discharging device according to claim 3, characterized in that A cooling water circulation pipeline is provided inside the drum (34).

5. The DOPO finished product discharging device according to claim 3, characterized in that, The feeding distributor (32) is conical, and is internally provided with a liquid material circulation pore channel, and the pore diameter is 5 - 10 mm.

6. The DOPO finished product discharging device according to claim 3, characterized in that The distance between the drum (34) and the bottom of the concave-type dipping feeder (33) is kept at 10 - 15 cm.

Images