Waste plastic cracking device

Abstract

The invention relates to a cracking device and specifically relates to a waste plastic cracking device. The waste plastic cracking device comprises a cracking furnace in which a cracking kettle is arranged, a cracking furnace support for supporting the cracking furnace and a plurality of burners arranged below the cracking furnace; a gas collecting pipe and a flue gas pipe are arranged at the top of the cracking furnace; a slag remover is arranged at the tail of the cracking furnace; a feeder is arranged in front of the cracking furnace; a feeder heating device is arranged under the feeder; a flame distribution pipe is arranged in the cracking furnace and located under the cracking kettle. The waste plastic cracking device is capable of overcoming the defects of the existing cracking device, realizing continuous and automatic feeding and reducing the labor intensity of a worker, and is high in cracking capability; large-scale production of the waste plastic cracking device can be realized.

Description

technical field [0001] The invention relates to a pyrolysis device, in particular to a waste plastic pyrolysis device. Background technique [0002] In the prior art, there are mainly three types of cracking devices used for cracking waste plastics: intermittent cracking devices, vertical cracking devices and small horizontal cracking devices. The main defects of these three cracking devices are: [0003] 1. Neither the batch type nor the vertical cracker is equipped with a special device for transporting materials into the cracking tank and ensuring the front seal of the cracking tank. Although the horizontal small cracker is equipped with a feeding device, it has no chlorine gas discharge function. Therefore, there are the following defects: 1. Automatic continuous feeding cannot be realized, and manual feeding is labor-intensive; 2. The process of drying and melting is carried out in a cracking kettle, which increases the size of the cracking kettle and improves the effi...

AI Technical Summary

Problems solved by technology

Therefore, there are the following defects: 1. Automatic continuous feeding cannot be realized, and manual feeding is labor-intensive; 2. The process of drying and melting is carried out in a cracking kettle, which increases the size of the cracking kettle and improves the efficiency of cracking. The thermal load of the kettle increases the consumption of high-temperature-resistant materials, and increases the manufacturing cost and difficulty; 3. Chlorine gas cannot be discharged outside the cracking kettle and disposed of

[0004] 2. The intermittent and vertical pyrolysis devices are not equipped with material heating devices, while the horizontal pyrolysis device uses waste heat flue gas from the flue to preheat or dry the raw material plastics, resulting in the following main defects: 1. Because there is no pre-heated flue gas The heating device and the cracking kettle have a large heat load, and the corresponding cracking kettle has a large size and a large heat exchange area, which consumes a large amount of high-temperature-resistant materials and increases the manufacturing cost; Difficulty; 3. Using tail flue gas to heat at a low temperature can only be used for drying, but not for melting plastics. Chlorine gas cannot be discharged if the temperature is not enough, so it cannot be processed outside the cracking kettle.

[0005] 3. None of the three cracking devices are equipped with a device that can distribute flames. Therefore, it is difficult for the cracking tank to be heated evenly in the circumferential direction, which may easily cause uneven thermal deformation of the cracking tank, which will cause the stirrer of the cracking tank to not operate normally, and eventually lead to cracking. Large-scale production is not possible, and the cracking capacity is small

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