Vacuum pyrolysis test device of wasted electronic circuit board

Abstract

The invention discloses a vacuum pyrolysis test device of a wasted electronic circuit board, which comprises a pyrolysis furnace, a condenser, a vacuum gauge, a vacuum acquisition apparatus, a medium circulating box and a tail gas adsorption tower. The pyrolysis furnace is provided with a charging chamber and a heating furnace chamber, which are sealingly isolated. The top of the charging chamberis provided with an insulation cover and enclosed by resistance heating tapes. The charging chamber is communicated with the condenser through a channel. The vacuum acquisition apparatus which keeps the charging chamber, the heating furnace chamber, the condenser and the channel in a vacuum state in the prolysis process of the wasted electronic circuit board is communicated with all apparatuses or positions in the heating furnace chamber, the charging chamber, the condenser and the channel. The vacuum gauge which measures the vacuum degree of the charging chamber, the heating furnace chamber,the condenser and the channel in real time is arranged on at least one of apparatuses or positions in the heating furnace chamber. The medium circulating box is respectively connected with the vacuumacquisition apparatus and the tail gas adsorption tower through a pipeline. The test device is compact in structure, low in investment, high in comprehensive resource recovery rate, good in economic benefits and free from pollution.

Description

technical field [0001] The present invention relates to a test device for recycling secondary polymer resources in solid wastes containing polymer resins, in particular to a dismantling process of waste electric appliances and epoxy and waste products produced in circuit board factories and leftovers. The test device for the recovery and utilization of secondary resources of phenolic resin polymer belongs to the innovative technology of the vacuum pyrolysis test device for waste electronic circuit boards. Background technique [0002] Circuit boards are widely used in the electronic and electrical industry, and are one of the key components of various electronic and electrical appliances, especially in large electronic products such as computers and televisions. Since a large number of defective products and leftover materials will be produced in the production process of circuit boards, in addition, a large amount of waste circuit boards will be produced in the dismantling ...

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Problems solved by technology

[0003] The general recycling methods for this kind of waste mainly include: ①Direct smelting method. Although this method has simple process, convenient operation and high metal recovery rate, the high molecular weight organic matter in waste circuit boards will be destroyed due to insufficient combustion during the smelting process. A large amount of harmful gas is produced, which is usually difficult to handle and directly discharged into the air, resulting in serious air pollution; ②Wet chemical method, this method mainly uses strong oxidizing media such as nitric acid and aqua regia to dissolve metals in waste circuit boards and give Recycling, this method consumes a lot of reagents, the process is complicated, and produces a large amount of waste water. Improper treatment will bring serious water pollution, and a large number of polymer organic components are discarded, which is difficult to handle, resulting in a waste of resources and serious environmental pollution; ③Pure Physical separation method, this method only uses relevant mechanical equipment to crush and grind waste circuit boards until it reaches a sufficient fineness, and then uses sorting equipment such as a shaking table to separate the metal components. This method consumes a lot of energy, The separation is not complete, and the polymer components are also not recycled, resulting in a serious waste of resources

To sum up, it is not ideal to use the existing methods for resource utilization of waste circuit boards.

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