Processing method and system of waste plastics

A technology for waste plastics and plastics, which is applied in the field of catalytic conversion methods and systems of waste plastics, can solve the problems of high construction cost of hazardous solid waste landfills, complex hydrogenation technology process, and high requirements for equipment materials, so as to improve the utilization value. , Solve equipment corrosion, solve the effect of high-efficiency value

Active Publication Date: 2022-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Landfilling is a simple and convenient method, but with the improvement of oil refining capacity, the amount of waste catalysts is increasing year by year, and waste catalysts usually contain metal elements such as Ni and V. Direct landfilling will inevitably result in waste of metal resources and pollution. environment, endangering human health
In the newly released "National Hazardous Waste List" in 2016, the waste catalytic cracking catalyst is classified as HW50 hazardous waste, which must be landfilled in accordance with the disposal requirements of hazardous solid waste, but the construction cost of hazardous solid waste landfill is relatively high
When producing fuel oil as the target product, hydrogenation technology is usually used as the main method to achieve the effect of dechlorination, which does not involve the production technology of high-aromatic gasoline. Hydrogenation technology has a complicated process due to hydrogen consumption and high requirements for equipment materials. Investment costs have increased significantly

Method used

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  • Processing method and system of waste plastics
  • Processing method and system of waste plastics
  • Processing method and system of waste plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] according to figure 1 The flow of the test is carried out, and the waste plastic catalytic decomposition reaction test is carried out on the medium-sized device of the riser reactor. The waste plastic mixture enters the lower part of the riser reactor, contacts with the hot industrial catalytic cracking unit waste catalyst, and carries out the catalytic decomposition reaction. In the reaction A dechlorination agent is injected into the lower part of the reactor. The amount of dechlorination agent is 2000 mg / kg of waste plastics. It reacts with the hydrogen chloride generated in the reactor. The reaction product and the catalyst to be produced enter the closed cyclone separator from the reactor outlet. The reaction product and The raw catalyst is quickly separated, and the reaction product is separated into cracked gas and plastic to generate oil in the separation system according to the distillation range. The separated gas is returned to the bottom of the riser reactor...

Embodiment 2

[0089] according to image 3 The process flow test is carried out on the medium-sized device of the riser and the dense phase fluidized bed series reactor, and the plastics generation oil catalytic conversion test is carried out. The plastics generation oil obtained in Example 1 enters the bottom of the riser reactor, and is mixed with hot DMMC- 2 Catalyst contact, and carry out catalytic conversion reaction, the reaction product and the catalyst go up and enter the dense phase fluidized bed reactor to continue the reaction, the reaction product and the unborn catalyst enter the closed cyclone separator from the outlet of the reactor, the reaction product and the unborn catalyst Rapid separation, the reaction product is separated into fractions such as dry gas, liquefied gas, gasoline and diesel in the separation system according to the distillation range, and the dry gas and liquefied gas are further separated into products such as ethylene, propylene and butene.

[0090] The...

Embodiment 3

[0099] according to figure 2 The test is carried out on the medium-sized device of the riser reactor. The raw material oil is a waste plastic mixture, and the catalyst is a waste catalyst of an industrial catalytic cracking unit. The waste plastic mixture is first contacted with a cold standby catalyst for melting and gasification And decomposition reaction, the reaction oil enters the bottom of the riser reactor to contact the cold regenerated catalyst and continue the decomposition reaction, the reaction oil moves up the reactor, and successively contacts the hot regenerated catalyst and dechlorination agent injected from the middle and downstream of the reactor And decomposition reaction and dechlorination reaction take place, the consumption of dechlorination agent is 2000 mg / kg, reacts with the chlorinated chlorine generated in the reactor, the reaction product and the unborn catalyst enter the closed cyclone separator from the reactor outlet, and the reaction product It...

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PUM

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Abstract

According to the waste plastic processing method and system, waste plastic is introduced into a fluidization reactor to be in contact with a pretreatment catalyst, a catalytic decomposition reaction is carried out, a reaction product is separated to obtain plastic generated oil, and the spent pretreatment catalyst is burnt and regenerated and then recycled; the method comprises the following steps: contacting the plastic generated oil with a catalytic conversion catalyst, carrying out a catalytic conversion reaction, separating reaction oil gas from the spent catalytic conversion catalyst, separating the reaction oil gas to obtain a product containing propylene, and carrying out charring regeneration on the spent catalytic conversion catalyst for recycling. The waste plastics are converted into high-value products such as low-carbon olefins, so that the pollution of the waste plastics to the environment is reduced, the high-value utilization of the waste plastics is realized, and the resource consumption is reduced.

Description

technical field [0001] The invention relates to a processing method and system for waste plastics, and more specifically, belongs to a catalytic conversion method and system for waste plastics. Background technique [0002] my country's plastic market demand is increasing year by year, and about 40 million tons of waste plastics are produced every year, but the recycling rate is only about 30%. With the improvement of environmental protection awareness and the continuous increase of environmental pressure, the main disposal methods of plastics are landfill and incineration, but the bulk density of plastic products is low, and it is not easy to decompose, so it is difficult to effectively achieve reduction and harmlessness in the short term. Chemical; incineration will produce a large amount of greenhouse gases, and release harmful gases such as dioxins. None of the above treatment methods can effectively solve the problem of "white pollution", and it is also a serious waste ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00C10G1/10C10G1/08
CPCC10G1/00C10G1/002C10G1/008C10G1/10C10G1/086C10G2300/1003C10G2300/202C10G2300/4006C10G2300/4018C10G2300/70
Inventor 魏晓丽龚剑洪毛安国刘宪龙张久顺宋宝梅
Owner CHINA PETROLEUM & CHEM CORP
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