A method for removing impurities and improving quality of solid waste pyrolysis liquid phase product and product

A pyrolysis liquid and product technology, applied in the preparation of liquid hydrocarbon mixtures, biological raw materials, liquid carbon-containing fuels, etc., can solve the problems of inconvenient separation and utilization, achieve effective disposal, reduce the generation of pollutants, and ensure effective absorption Effect

Active Publication Date: 2021-06-11
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the liquid phase products of full-component pyrolysis, this method inevitably leads to a more complex structure transformation of the tar components, which brings inconvenience to further separation and utilization.

Method used

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  • A method for removing impurities and improving quality of solid waste pyrolysis liquid phase product and product
  • A method for removing impurities and improving quality of solid waste pyrolysis liquid phase product and product
  • A method for removing impurities and improving quality of solid waste pyrolysis liquid phase product and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (a) LiOH and LiHCO 3 Mix according to the mass ratio of 1:1 to obtain lithium-based molten salt temperature regulator, Ca(OH) 2 and Mg(OH) 2 Mixing according to the mass ratio of 1:1 to obtain calcium-magnesium composite molten salt, and then mixing the above-mentioned lithium-based molten salt temperature regulator and calcium-magnesium composite molten salt according to the mass ratio of 1:2 to obtain a primary molten salt system;

[0037] (b) The mixture of sawdust pyrolysis liquid phase products and rubber pyrolysis liquid phase products is introduced into the primary molten salt system by means of argon gas, heated to 400 ° C and kept for 40 minutes, so as to achieve low temperature removal of impurities and obtain Primary liquid phase product;

[0038] (c) Fe 2 (CO 3 ) 3 : Cr 2 o 3 ·xCO 2 ·yH 2 O: NiCO 3 According to the mass ratio of 1:1:1 mixed to obtain the transition metal catalyst, the Na 2 CO 3 and K 2 CO 3 Mixing according to the mass ratio of...

Embodiment 2

[0045] (a) LiOH single substance is used as a lithium-based molten salt temperature regulator, and Ca(OH) 2 and Mg(OH) 2 Mixing according to a mass ratio of 1:1 to obtain a calcium-magnesium composite molten salt, and then mixing the above-mentioned lithium-based molten salt temperature regulator and calcium-magnesium composite molten salt according to a mass ratio of 1:4 to obtain a primary molten salt system;

[0046] (b) Introduce the mixture of wood chip pyrolysis liquid phase products and plastic pyrolysis liquid phase products into the primary molten salt system by means of argon gas, heat to 600°C and keep it warm for 20 minutes, so as to achieve low temperature removal of impurities and obtain Primary liquid phase product;

[0047] (c) Fe 2 (CO 3 ) 3 : NiCO 3 According to the mass ratio of 1:1 mixed to obtain the transition metal catalyst, the Na 2 CO 3 and K 2 CO 3 Mixing according to the mass ratio of 1:1 to obtain sodium-potassium composite molten salt, and...

Embodiment 3

[0055] (a) LiHCO 3 A single substance is used as a lithium-based molten salt temperature regulator, and Ca(OH) 2 and Mg(OH) 2 Mixing according to the mass ratio of 2:1 to obtain calcium-magnesium composite molten salt, and then mixing the above-mentioned lithium-based molten salt temperature regulator and calcium-magnesium composite molten salt according to the mass ratio of 2:5 to obtain a primary molten salt system;

[0056] (b) Introduce the mixture of wood chip pyrolysis liquid phase products, plastic pyrolysis liquid phase products and rubber pyrolysis liquid phase products into the primary molten salt system by means of helium gas carrying, heat to 600°C and keep it warm for 30min, to This achieves low-temperature removal of impurities and obtains a first-level liquid phase product;

[0057] (c) NiCO 3 A single substance acts as a transition metal catalyst, Na 2 CO 3 and K 2 CO 3 Mixing according to the mass ratio of 1:1 to obtain sodium-potassium composite molten...

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Abstract

The invention belongs to the field of solid waste treatment, and specifically discloses a method for removing impurities and improving the quality of solid waste pyrolysis liquid phase products and the product. The method specifically includes: mixing a lithium-based molten salt temperature regulator and a calcium-magnesium composite molten salt to obtain a primary molten salt system, introducing the solid waste pyrolysis liquid phase product into the primary molten salt system, heating and maintaining the temperature for a preset time, In this way, impurities can be removed at low temperature and a first-level liquid phase product can be obtained; a second-level molten salt system can be obtained by mixing the transition metal catalyst and sodium-potassium composite molten salt, and the first-level liquid phase product can be introduced into the second-level molten salt system, heated and kept warm Set the time to achieve high-temperature upgrading and obtain the secondary liquid phase product; condense and separate the secondary liquid phase product, and collect the uncondensed gas and clean homogenized liquid phase product respectively. The present invention uses a molten salt cascade treatment method to classify the solid waste pyrolysis liquid phase product, which not only reduces the generation of pollutants, improves production efficiency, but also realizes effective disposal of the solid waste pyrolysis liquid phase product.

Description

technical field [0001] The invention belongs to the field of solid waste treatment, and more specifically relates to a method for removing impurities and improving the quality of solid waste pyrolysis liquid phase products and products. Background technique [0002] The output of municipal solid waste is huge, and the annual output has exceeded 200 million tons per year. From the perspective of environment and economy, the disposal of solid waste in my country has become an urgent problem to be solved. As one of the effective ways to dispose of municipal solid waste, pyrolysis technology can convert solid waste into multi-phase products with potential utilization value such as combustible gas, activated coke and liquid phase products. Among them, the pyrolysis liquid phase product can not only be used as fuel, but also can provide raw materials for aroma chemical industry and special chemicals. Different from the utilization of combustible gas and activated coke, the compon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00C10L1/02C10L1/04C10L3/08
CPCC10G3/40C10G3/44C10G3/45C10G3/46C10L1/02C10L1/04C10L3/08Y02P30/20
Inventor 胡红云高强姚洪李爱军杨福杨宇涵邓雨婷徐凯
Owner HUAZHONG UNIV OF SCI & TECH
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