Plastic cracking system and heating method thereof

Abstract

The invention discloses a plastic cracking system and a heating method thereof, which relate to the field of hydrocarbon oil cracking. The key points of the technical scheme are as follows: the plastic cracking system comprises a plastic particle cracking reaction kettle and a heat source, a heat medium outlet of the heat source is connected to a heat medium inlet of the plastic particle crackingreaction kettle, a heat medium outlet of the plastic particle cracking reaction kettle is connected to a heat medium reflux inlet of the heat source, the heat source of the plastic particle cracking reaction kettle is a molten salt furnace system, and heat is supplied by a molten salt furnace. The technical effects are as follows: since heat which is needed by the plastic cracking system is supplied by the molten salt furnace, firstly, the heat medium inlet temperature of the plastic particle cracking reaction kettle is 500 DEG C, the heat medium outlet temperature of the plastic particle cracking reaction kettle is controlled at about 480 DEG C after heat is absorbed by the plastic particle cracking reaction kettle, and therefore the cracking temperature difference is only about 20 DEG C;secondly, molten salt can be circularly heated for use, the stability of heat energy is good, and heating is uniform; and thirdly, the energy utilization rate of each system of the plastic cracking system is maximized.

Description

technical field [0001] The invention relates to the field of hydrocarbon oil cracking, in particular to a plastic cracking system and a heating method thereof. Background technique [0002] At present, the Chinese patent whose publication number is CN105505431A discloses a continuous sealing cracking system for colloidal particles, which includes a silo, a first sealing propeller, a colloidal particle cracking reactor, a second sealing propeller and a heat source, and the silo is installed At the feed port of the first sealed propeller, the discharge port of the first sealed propeller communicates with the feed port of the colloidal particle cracking reaction kettle, and the discharge port of the colloidal particle cracking reaction kettle is connected with the second sealed propeller The feed port of the heat source is connected; the heat medium output port of the heat source is connected with the heat medium inlet of the rubber particle cracking reactor, and the heat mediu...

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Problems solved by technology

Since the pyrolysis system needs to be continuously stable at a temperature of 500 degrees Celsius, in actual work, after the pyrolysis system circulates a work process, there will be obvious heat loss after the heat medium conducts heat, especially when the pyrolysis furnace in the pyrolysis system When there are multi-stage cracking devices, the temperature of the heat medium in the tail stage is low, which cannot reach the temperature required by the normal cracking system

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