Screw feeder for plastic garbage cracking furnace

Abstract

A screw feeder for a plastic waste pyrolysis furnace, which is connected with a lower shaft seat through a connecting rod at the lower part of the feeder outer cover, the lower shaft seat is connected with the lower end of the feed shaft through a bearing, and the lower shaft seat supports the feed shaft The lower end, the upper end of the feed shaft and the upper cover are connected by bearings, realizing the up and down support of the feed shaft, which can effectively solve the swing problem of the feed shaft in the existing suspension setting during the rotation process, and avoid the feed shaft and the feed shaft. The friction between the outer covers of the feeder ensures the service life of the equipment. The pitch of the feeding screw is related to the feeding speed and efficiency. If the feeding screw pitch is large, the feeding efficiency will be high, but the resistance to the rotation of the feeding screw will be large. If the feeding screw pitch is small, the feeding efficiency will be low, which will easily lead to cracking of the cracking furnace. The efficiency is low, but the present invention limits the pitch of the feeding screw to 1 / 3 of the outer diameter of the feeding screw, which can not only ensure the feeding efficiency, but also reduce the feeding resistance and save energy.

Description

technical field [0001] The invention belongs to the field of garbage treatment, and in particular relates to a screw feeder for a plastic garbage cracking furnace in a plastic garbage treatment system in a method for continuously treating and comprehensively utilizing plastic garbage. Background technique [0002] Plastic waste is one of the common wastes in daily production and life. Due to the difficulty of degradability of plastic waste, the current methods of dealing with plastic waste mainly use landfill, burning, and cracking; the landfill method is to buy plastic waste into the ground, By its natural degradation, this method takes a long time, has a great impact on the environment, and occupies land; the burning method is to burn plastic waste, or burn it together with other waste or materials as power generation or other heat sources. After burning, a large amount of toxic gas will be produced, which will cause secondary pollution to the environment; the cracking met...

AI Technical Summary

Problems solved by technology

[0002] Plastic waste is one of the common wastes in daily production and life. Due to the difficulty of degradability of plastic waste, the current methods of dealing with plastic waste mainly use landfill, burning, and cracking; the landfill method is to buy plastic waste into the ground, By its natural degradation, this method takes a long time, has a great impact on the environment, and occupies land; the burning method is to burn plastic waste, or burn it together with other waste or materials as power generation or other heat sources. After burning, a large amount of toxic gas will be produced, which will cause secondary pollution to the environment; the cracking method is to put plastic waste into the cracking furnace, decompose the plastic again, and produce petroleum substances after decomposition, which can be reused as fuel or other raw materials; In the existing pyrolysis treatment method, there are the following problems. First, the existing complete continuous pyrolysis equipment has requirements for the composition of the plastic in the plastic waste, that is to say, the consistency of the plastic species in the plastic waste is required to be good. The proportion of plastic components needs to reach more than 85%, which can be achieved for countries or regions that do a good job in waste classification, but it is difficult for countries or regions that do not do a good job in waste classification or do not do it meticulously; if not If such composition requirements can be met, the existing pyrolysis equipment cannot realize the pyrolysis of plastic waste, and the equipment will not work at least, and the equipment will explode at worst; moreover, for the treatment method of discontinuous pyrolysis, a large amount of waste will be generated during the pyrolysis process. Toxic gases will still be discharged into the atmosphere, causing secondary pollution to the environment. At the same time, these toxic gases will produce strong acids when they meet water, which will cause serious corrosion of equipment and shorten the service life of equipment; third, due to the presence of different plastic components in cracking, cracking The temperature can only adapt to the pyrolysis temperature of a certain type of plastic, and it is impossible to crack the plastic waste in one pyrolysis furnace. At the same time, it is necessary to sort the plastic types, and the residue after pyrolysis is easy to stick to the furnace wall, causing damage to the cracking furnace. At the same time, cleaning the residue on the furnace wall will also cause secondary pollution to the environment; fourth, the existing plastic waste is sorted by crushing the plastic waste, which consumes a lot of energy and causes energy waste

[0003] In order to solve the above problems, the applicant submitted a Chinese invention patent application with the application number "2017104731616" and the name "a plastic waste pyrolysis furnace". The patent application discloses a pyrolysis furnace for a plastic waste treatment system. The plastic waste The treatment system can realize the continuous cracking of multi-component plastic waste, and does not discharge any solid, liquid and gas that pollutes the environment during the cracking process, realizing the comprehensive utilization of plastic waste and saving energy. However, in the actual use of the cracking furnace, It often happens that the oil and gas produced by plastic cracking enters the conical bin of the cracking furnace along the screw feeder of the cracking furnace, resulting in problems such as poor sealing of the cracking inner cavity of the cracking furnace and leakage of cracking gas. In addition, the existing cracking furnace The feeding screw type suspension of the advanced screw feeder is set on the top of the upper cover of the cracking furnace, and the lower end of the feeding screw is completely suspended

The lack of necessary support structure leads to excessive swing of the lower end of the feed screw during actual use, and the unstable rotation of the feed screw, resulting in uneven feeding. At the same time, the swing of the lower end of the feed screw is also easy to touch the outer cylinder. Increased friction seriously affects the service life of the feed screw

Images