CN2207237Y - Waste Plastic Film Ultrasonic Cleaning Machine - Google Patents

Abstract

The waste plastic film ultrasonic cleaning machine of the utility model is composed of a tank body and an ultrasonic generator. The tank body is in the shape of a square box. Equipped with a strainer. Ultrasonic generators are arranged on the inner walls of both sides of the tank body. The tank body is provided with a floating plate, a folding plate and a baffle. The ultrasonic generator is composed of an ultrasonic transducer and a casing, and the ultrasonic transducers are arranged in the casing in an inverted triangle shape. The utility model can be used for cleaning treatment of waste plastic film (agricultural film, mulch film) regeneration processing.

Description

The utility model relates to a liquid cleaning device with ultrasonic vibration, which is especially suitable for cleaning waste plastic films.

Recycling of waste plastic film generally requires crushing, cleaning, dehydration, and drying before it can be further processed into finished products. Generally, the cleaning process adopts a mechanical method, and the broken waste plastic film is stirred in water to wash away the silt and dirt on the surface of the plastic film. Using this mechanical method, it is difficult to remove the dirt with strong adhesion to the plastic surface. Not only the cleaning effect is very unsatisfactory, but also the energy consumption is large, and continuous operation cannot be performed. The cleaning effect directly affects the processing performance and quality of recycled plastic products. The cleaning method of ultrasonic vibration has long been used in the cleaning of product surfaces in the mechanical and electronic industries. The metal surface is easy to accept the action of ultrasonic waves, and it is easy to obtain better cleaning effects. Since the specific gravity of the plastic film is about 0.7, which is lighter than water and floats on the water, the sound pressure and sound flow of the ultrasonic wave have a weak effect on the soft plastic film. The ultrasonic cleaning equipment used in general machinery and electronics industries cannot be used for plastic cleaning. Membrane cleaning.

The purpose of the utility model is to provide a device for cleaning the dirt on the surface of the waste plastic film. The device can be operated continuously and has a good cleaning effect, and can be used for regeneration processing of the waste plastic film.

The utility model relates to an ultrasonic cleaning machine for waste plastics, which is composed of a tank body and an ultrasonic generator. The tank body is in the shape of a square box, the inlet of the cleaning liquid is set at the front of the tank body, and the discharge port is set on the rear wall of the tank body; the lower part of the tank body is equipped with a filter screen; the ultrasonic generator is set on the inner walls of both sides of the tank body. A floating plate is arranged behind the inlet of the cleaning liquid in the front of the tank body; a flap is arranged in front of the outlet of the rear part in the tank body. Vertical baffles are arranged in parallel between the upper ultrasonic generators in the tank body, and there are support frames on both sides of the baffle plates, and the support frames are connected to the tops of the inner walls on both sides of the tank body. The ultrasonic generators arranged on the inner walls of both sides of the tank body are preferably distributed in a staggered arrangement. The ultrasonic generator is composed of a housing and an ultrasonic transducer, and the ultrasonic transducers are arranged in an inverted triangle in the housing.

Fig. 1 is the front view of the waste plastic film ultrasonic cleaning machine of the utility model.

FIG. 2 is a top view of FIG. 1 .

FIG. 3 is a side view of FIG. 1 .

Fig. 4 is a schematic diagram of the arrangement of ultrasonic transducers.

As shown in Fig. 1, Fig. 2 and Fig. 3, the waste plastic film ultrasonic cleaning machine of the utility model is composed of a tank body 1 and an ultrasonic generator 2, the tank body 1 is a square box shape, and the cleaning liquid inlet 3 is located in the tank body 1 The front part, the discharge port 4 is set on the rear wall 5 of the tank body 1, the lower part of the tank body 1 has a filter screen 6, the filter screen 6 is placed on the bracket 7 on the inner wall of the tank body 1, and the ultrasonic generator 2 is located in the tank body On the inner walls 8 on both sides of the body 1. A floating plate 9 is provided behind the front cleaning liquid inlet 3 in the tank body 1 , and a folding plate 10 is provided before the rear discharge port 4 of the tank body 1 . Between the upper ultrasonic generator 2 in the tank body 1, a plurality of vertical baffles 11 are arranged in parallel, and there are support frames 12 on both sides of the baffle plate 11, and the support frames 12 are connected with the tops of the inner walls 8 on both sides of the tank body 1. The ultrasonic generator consists of a housing 13 and an ultrasonic transducer 14 . As shown in FIG. 4 , the ultrasonic transducers 14 are arranged in an inverted triangle and fixed in the casing 13 , and the ultrasonic generator 2 is suspended on the inner walls 8 on both sides of the tank body 1 .

When the waste plastic ultrasonic cleaning machine of the utility model is used to clean the recycled waste plastic agricultural film and mulch film, the cleaning liquid can be water or organic solution (such as water and acetone solution) according to the dirt on the surface of the plastic film, and the cleaning liquid is pumped from the cleaning liquid The inlet 3 is injected into the cleaning machine, and the height of the overflow port 15 is about several centimeters higher than the top of the ultrasonic generator 2, so as to ensure that the ultrasonic generator 2 is immersed in the cleaning liquid, and the top of the folding plate 10 should be lower than the ultrasonic generator 2 and higher than the height of the discharge port 4, so that the cleaning liquid and the broken plastic film floating on its upper part can pass through the folding plate smoothly, and then pumped out of the cleaning machine from the discharge port 4 to the next process. The broken plastic film is sent in from the top of the cleaning machine, and the floating plate 9 makes the plastic film float in the cleaning solution, so as to avoid being taken out of the cleaning machine from the overflow port 15. The ultrasonic generators 2 are suspended on the inner walls 8 on both sides of the tank body, and are preferably arranged in a staggered arrangement, so as to avoid mutual interference of ultrasonic waves and cause blind spots in the sound field. There is a baffle 11 between the ultrasonic generators 2, so that the plastic membrane rolls in the flowing cleaning liquid, fully interacts with the ultrasonic waves emitted by the ultrasonic generator 2, and obtains a good cleaning effect under the action of ultrasonic cavitation. The sediment cleaned from the surface of the plastic membrane is deposited on the bottom of the tank 1 through the filter screen 6 at the bottom of the tank body 1. The filter screen 6 is placed on the brackets 7 in the inner walls 8 on both sides of the tank body, and can be disassembled for cleaning regularly. , and remove dirt such as mud and sand deposited at the bottom of the tank body 1. A sewage outlet 16 is provided at the bottom of the tank body 1 to discharge the dirt in the tank body 1 . The ultrasonic generator 2 is suspended on the upper half of the inner wall 8 on both sides of the tank body, and can be overhauled and replaced without stopping the vehicle, which is very convenient. Ultrasonic generator 2 is made up of a plurality of ultrasonic transducers 14 that are arranged in an inverted triangle. Because the plastic diaphragm is floating on the top of the cleaning liquid, the number of ultrasonic transducers 14 in the upper part is more than that in the lower part, which can make the energy of ultrasonic emission It is strong in places where plastic diaphragms are dense, and it is more conducive to the interaction between ultrasonic waves and plastic diaphragms to obtain ideal cleaning effects. Adjust and control the input volume of the plastic diaphragm, the input volume of the cleaning liquid, and the output and discharge volume from the discharge port, so that the ratio of the plastic diaphragm to the cleaning liquid volume, the height and flow of the cleaning liquid are in the best state for continuous cleaning. operate. For the situation where the amount of cleaning is large and the amount of dirt is large, the length of the tank 1 can be appropriately lengthened, and the number of ultrasonic generators 2 can be increased (the ultrasonic generators shown in Figure 1 are 4), in order to obtain a satisfactory cleaning effect and High cleaning efficiency.

When processing 2 kg of waste plastic film (agricultural film, mulch film) per minute, a tank with an external size of 3100×860×650mm (length×width×height) is used, and 8 ultrasonic generators are used, 4 of which are staggered on one side. on the inner wall of the tank. Each ultrasonic generator is composed of 6 commercially available ultrasonic transducers, each ultrasonic transducer is 50W, and the frequency ν is 20000 Hz. The cleaning liquid adopts water. The filter screen adopts a φ2 wire mesh with a hole of 10×10mm. The light transmittance method is used to measure, and the cleaning effect of the waste plastic film cleaning machine of the utility model is dozens of times better than that of the agitating type mechanical cleaning machine. The waste plastic films cleaned by the cleaning machine of the utility model can be directly sent to the wet plastic film granulation extruder for processing without drying treatment, and can directly obtain recycled plastic products. The used cleaning solution can be used for pre-cleaning of plastic film.

Claims (5)

1. An ultrasonic cleaning machine for waste plastic film, consisting of a tank body and an ultrasonic generator, characterized in that: (1) The tank body is in the shape of a square box, the cleaning liquid inlet is set at the front of the tank body, and the discharge port is set on the rear wall of the tank body; (2) The lower part of the tank body is provided with a filter screen; (3) Ultrasonic generators are arranged on the inner walls of both sides of the tank body. 2. The ultrasonic cleaning machine according to claim 1, characterized in that: (1) There is a floating plate behind the cleaning liquid inlet in the front of the tank; (2) There is a folding plate before the rear outlet in the tank body. 3. The ultrasonic cleaning machine according to claim 1, characterized in that: vertical baffles are arranged in parallel between the upper ultrasonic generators in the tank, and there are support frames on both sides of the baffle, and the support frames are connected to both sides of the tank body. The top connection of the inner wall. 4. The ultrasonic cleaning machine according to claim 1, wherein the ultrasonic generators arranged on the inner walls of both sides of the tank body are arranged in a staggered arrangement. 5. The ultrasonic cleaning machine according to claim 1, wherein the ultrasonic generator is composed of a housing and ultrasonic transducers, and the ultrasonic transducers are arranged in the housing in an inverted triangle shape.

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