Cooling tower special for auxiliary cooling of rubber high-temperature continuous plasticator

Abstract

The invention discloses a cooling tower special for auxiliary cooling of a rubber high-temperature continuous plasticator. A water cooling isolation layer 9 is directly connected with the cooling section in a spiral mode, cold water enters from a water inlet 12, and water 10 obtained after heat exchange flows out of a water outlet 11 and enters an outdoor cooling tower. A spiral of the cooling section is directly connected with the cooling tower 1, and the cooling tower 1 is provided with a heat-conducting fin 6 and other heat conductors 5; a closed space is formed by a cooling tower 1 and a cooling section; only heat exchange with the outside is realized; an annular water pipe 2 is arranged below the umbrella edge 7, and a plurality of atomizing nozzles 3 are arranged on the lower portion of the annular water pipe 2. When the temperature sensor 13 detects that the temperature of the discharging position of the cooling section is higher than 50 DEG C, an electric signal is sent to the control system, the control system controls the power system to supply water to the water inlet 4, and the water is atomized and sprayed out from the atomizing nozzle 3 for further cooling. Under the condition of no pollution, the cooling effect is further enhanced, so that the cooling problem of the high-yield and high-efficiency rubber plasticizing system is solved.

Description

Technical Field

[0001] The invention is mainly used for auxiliary cooling of the cooling section of a high-temperature continuous plasticizing machine for rubber. Background Art

[0002] The current cooling method involves adding an outer jacket to the outer spiral tube of the cooling section, leaving a gap in between. Cooling water (approximately 20°C) from outside the workshop is introduced into the spiral interlayer for heat exchange. Because the rubber powder to be cooled is above 300°C, it must be cooled to a safe temperature of below 50°C within 10 minutes. To increase production, the overall spiral diameter of the plasticizer has been increased to a certain extent, making the cooling method impossible using the previous method. Therefore, for safety reasons, an auxiliary cooling tower was invented.

[0003] During the continuous, high-temperature plasticizing process, rubber powder reaches a maximum temperature of 300°C to 350°C. Because the plasticizer operates at high temperatures and continuously, the plasticizing reaction time inside the machine is only about 25 minutes. The resulting hot rubber powder remains very hot, requiring cooling before it can be discharged. However, the cooling time in the cooling section is only about 10 minutes. Current cooling methods make it impossible to cool hot rubber powder over 300°C to a safe temperature within 10 minutes. Discharging the hot rubber powder from the machine at this stage is unsafe, as it is still 70°C to 80°C. Residual chemical raw materials remain within the plasticized rubber powder, which slowly generates heat when exposed to oxygen in the air. Over time, this can lead to spontaneous combustion, potentially causing a fire. Summary of the Invention

[0004] The plasticized high-temperature rubber powder is conveyed into a cooling spiral (the cooling spiral is provided with a water-cooling interlayer on the spiral shell) through a spiral conveyor, and the high-temperature rubber powder is slowly pushed forward by the continuous spiral conveyor to undergo heat-cold exchange. Since the plasticizer works in a fully closed environment, the rubber powder temperature is above 300°C, and it is impossible to reach the rubber powder safe discharge temperature (below 50°C) by cooling with a water-cooling interlayer alone. In order to make the temperature in the rubber powder meet the standard, the inventor opened N exhaust holes on the top surface of the cooling spiral. The exhaust holes are connected to the cooling tower of the present invention with flanges, allowing a large amount of hot gas to pass through the exhaust holes directly into the auxiliary cooling tower of the present invention for auxiliary cooling, and finally the hot rubber powder is cooled to a safe temperature below 50 degrees. The auxiliary cooling tower of the present invention is provided with a spraying device on the top. When the temperature sensor at the discharge port of the cooling section measures that the material temperature is higher than 50°C, the spraying device automatically opens, atomizes the water and sprays it downward, and a part of the atomized water evaporates in the surrounding air outside the cooling tower of the present invention and takes away the heat. The temperature difference between the cooling tower and the outside air is increased, allowing heat to dissipate more quickly. Another portion of the water is sprayed directly onto the outer surface of the cooling tower. The water vapor, exposed to the higher temperature, evaporates rapidly, removing heat. This further reduces the temperature of the cooling tower and accelerates internal and external heat exchange. The atomized water flow rate is controlled to ensure that the atomized water evaporates only within the cooling tower section and the surrounding working area, without affecting other areas.

[0005] The advantages of the present invention compared with the prior art are:

[0006] 1. The existing technology only uses cold water from the outside to perform heat exchange in the water-cooling interlayer of the spiral cooling section to cool the rubber powder. The present invention transfers most of the hot air in the hot rubber powder to the auxiliary cooling tower for further cooling.

[0007] 2. The present invention increases the heat conduction area and enhances the cooling effect.

[0008] 3. Existing cooling technology suffers from poor cooling performance, which long-term impacts production safety and output. The auxiliary cooling tower of this invention overcomes the bottleneck of poor cooling performance and low output. This allows for larger plasticizer diameters, increased output, lower production costs, and improved efficiency.

[0009] 4. The auxiliary cooling tower of the present invention has no consumables, and the micro water pump of the spraying device has very low power and low cost of use.

[0010] 5. To increase production, the plasticizer spiral tube can be enlarged and thickened without increasing power consumption. This is because the present invention uses a highly conductive medium in the plasticizing spiral section to accelerate heat conduction and improve heat conduction efficiency. This fully achieves the goal of low energy consumption and high production. Conventional plasticizers consume between 180 and 190 degrees Celsius per ton (proven by our company's long-term work experience). By using a highly conductive medium, the conduction speed is increased, and now the power consumption per ton is only 118 to 130 degrees Celsius (proven by actual production). Therefore, increasing production does not increase power consumption, but instead provides significant energy savings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention; DETAILED DESCRIPTION

[0012] Water from the outdoor cooling tower enters the water-cooled isolation layer 9 through the water inlet 12. After heat exchange, the water 10 is sent to the outdoor cooling tower through the water outlet 11 for cooling. The hot air in the rubber powder 8 flows upward through the cooling tower 1 of the present invention. The cooling tower 1 of the present invention has a large heat transfer area, including heat conducting plates 6, a heat transfer body 5, and a tower body, which enhance heat conduction and offer excellent thermal conductivity, allowing heat to be quickly dissipated. When the temperature sensor 13 at the cooling device's discharge port detects that the rubber discharge temperature is above 50°C, the temperature signal is transmitted to the digital control system, which controls the water pump to open, allowing water to enter the spray inlet 4. The water then flows through a pipe around the annular water pipe 2, which is equipped with a plurality of atomizing nozzles 3 from top to bottom. The water sprayed from the atomizing nozzles 3 forms a mist, which allows the water to evaporate more efficiently and remove heat, further cooling the cooling tower 1 of the present invention and the surrounding air. The top rim 7 of the tower restricts the upward movement of the mist and concentrates it more closely near the cooling tower. This also increases the cooling area. The cooling tower 1 and the cooling section of the plasticizer of the present invention form a closed environment. After evaporation within the cooling tower, water vapor rises and condenses into water droplets upon encountering low temperatures. These droplets then flow back into the plasticized rubber powder through continuous condensation. Because high-temperature continuous plasticizers use very little water, the condensed water flowing back into the rubber powder does not exceed the water content standard, but remains within the standard range.

[0013] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A cooling tower specially designed for auxiliary cooling of a high-temperature continuous plasticizing machine for rubber, characterized in that The cooling tower (1) is directly connected to the cooling section.

2. A cooling tower specially designed for auxiliary cooling of a high-temperature continuous plasticizing machine for rubber, characterized in that The shapes of the cooling tower (1) of the present invention include circular cross-sections (including diameters ranging from 20mm to 2000mm), polygonal cross-sections and special cross-sections; the overall shape is straight cylindrical or conical; and the tower height can be from 200mm to 15m.

3. A cooling tower specially designed for auxiliary cooling of a high-temperature continuous plasticizing machine for rubber, characterized in that The cooling tower body (1) of the present invention is provided with (5) (6) radiating fins.

4. A cooling tower specially designed for auxiliary cooling of a high-temperature continuous plasticizing machine for rubber, characterized by: The upper part of the cooling tower (1) of the present invention and the lower part of the umbrella edge (7) are provided with an annular water pipe (2), and a plurality of atomizing nozzles (3) are arranged downward on the annular water pipe (2).

5. A cooling tower specially designed for auxiliary cooling of a high-temperature continuous plasticizing machine for rubber, characterized by: A non-ventilated heat dissipation duct is directly connected above the cooling section.

6. A cooling tower specially designed for auxiliary cooling of a high-temperature continuous plasticizing machine for rubber, characterized by: The number of cooling towers (1) of the present invention ranges from 1 to numerous.

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