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Method for efficient resource utilization of tank bottom oil sludge

A technology of recycling and oil sludge, applied in chemical instruments and methods, petroleum industry, sludge treatment, etc., can solve the problems of incomplete treatment, waste of resources, high cost, etc., to promote oil production rate, reduce treatment cost, increase Yield effect

Active Publication Date: 2021-06-25
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of "high cost, low efficiency, incomplete treatment, and serious waste of resources" existing in the existing tank bottom sludge treatment technology, the purpose of the present invention is to provide a method for efficient resource utilization of tank bottom sludge. The method uses catalyst A to catalyze the hydrothermal liquefaction of oil sludge at the bottom of the tank for resource recovery and utilization

Method used

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  • Method for efficient resource utilization of tank bottom oil sludge
  • Method for efficient resource utilization of tank bottom oil sludge
  • Method for efficient resource utilization of tank bottom oil sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The fresh tank bottom sludge is subjected to dehydration pretreatment. The process is as follows: the fresh tank bottom sludge is exposed to sunlight to evaporate part of the water. The exposure time is 8 days. During the exposure process, part of the fresh tank bottom sludge Crude oil is precipitated, and the precipitated crude oil is recovered and collected, and the remaining raw material is the raw material for liquefaction of tank bottom sludge. The raw material for liquefaction of oil sludge at the bottom of the tank obtained in Blank Example 1 was analyzed by an elemental analyzer, and the analysis results are shown in Table a.

[0033] table a

[0034]

[0035]The oil content, water content, and solid content of the tank bottom sludge liquefaction raw material obtained in Blank Example 1 were tested, and the results are shown in Table b.

[0036] table b

[0037]

[0038] Example 1:

[0039] use as figure 1 The shown liquefaction device reacts. In this ...

Embodiment 2

[0057] use as figure 1 The shown liquefaction device reacts. In this embodiment, under the condition of adding catalyst A, the recovery effect of tank bottom oil sludge liquefaction resources under the best conditions is explored. The operation process is as follows (the process flow chart is as follows figure 2 shown):

[0058] S1: Pyrolyze fresh rice husks, put dry rice husks into a muffle furnace at 500°C for 1.0 hour under an argon atmosphere, grind them into powder after cooling, and pass through a 100-mesh sieve to make biochar powder. The obtained biochar powder was mixed with ethanol according to the mass ratio of 1.1:18.9 to obtain catalyst A.

[0059] S2: Mix the tank bottom sludge liquefaction raw material obtained in Blank Example 1, Catalyst A and water according to the mass percentage, and then place it in the tank bottom sludge reaction kettle, feed argon gas until the initial pressure is 3.0 MPa, and then close the tank bottom sludge reactor , carry out the...

Embodiment 3

[0074] use as figure 1 The shown liquefaction device reacts. In this example, under the condition of only ethanol or only adding biochar, the effect of recovery of tank bottom sludge liquefaction resources is explored. The operation process is as follows:

[0075] S1: Mix the tank bottom sludge liquefaction raw material obtained in Blank Example 1 with water according to the mass percentage, then place it in the tank bottom sludge reactor, add ethanol or biochar, feed argon until the initial pressure is 3.0MPa, and then react the tank bottom sludge The kettle is closed, the heating temperature for the liquefaction reaction is set to 300°C, and the reaction time is 30 minutes;

[0076] Wherein: when only ethanol is added, the mass percentage of the tank bottom sludge liquefaction raw material is 9.6%, the mass percentage of water is 47.9%, the mass percentage of ethanol is 42.5%, and the sum of the mass percentages of each component is 100%; when only biochar is added (biochar...

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Abstract

The invention discloses a method for efficient resource utilization of tank bottom oil sludge, which comprises the following steps of: carrying out dehydration pretreatment on fresh tank bottom oil sludge, mixing the obtained tank bottom oil sludge liquefied raw material with a catalyst A, carrying out hydrothermal liquefaction reaction, and after the reaction is finished, carrying out post-treatment to obtain a gas-phase product, a water-phase product, bio-oil and a solid-phase product. A preparation process of the catalyst A comprises the following steps of: putting dry rice husks into a muffle furnace, pyrolyzing in an argon atmosphere to generate biochar, cooling, grinding the product into biochar powder, and mixing the obtained biochar powder with ethanol to obtain the catalyst A. According to the invention, the catalyst A is utilized to catalyze hydrothermal liquefaction of tank bottom oil sludge, the catalyst A can significantly improve the oil yield after tank bottom oil sludge liquefaction, and especially at a liquefaction temperature of 300 DEG C, the oil yield is significantly improved. According to the method disclosed by the invention, the hazardous waste, namely the tank bottom oil sludge, can be properly treated, meanwhile, the bio-oil and the water-phase product and the solid residue with subsequent utilization value are recycled, and most of resources in the tank bottom oil sludge are fully utilized.

Description

technical field [0001] The invention relates to a method for efficient resource utilization of oil sludge at the bottom of tanks, and belongs to the technical field of environmental protection in the petroleum industry. Background technique [0002] Petroleum is known as "the blood of industry". Human life is inseparable from petroleum, but a large amount of oily sludge is often produced during petroleum exploitation, transportation and storage. my country produces an average of 300Mt of oily sludge every year, including 800kt of oily sludge at the bottom of tanks and ponds. The composition of oily sludge is complex, containing a variety of heavy metals, polycyclic aromatic hydrocarbons and other toxic and harmful substances. my country has clearly identified oily sludge as waste mineral oil in the "National Hazardous Waste List", numbered HW08. According to the source, it can be divided into oilfield sludge, storage and transportation sludge, refining sludge and sludge pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/08C02F11/13C02F11/00
CPCC10G1/086C02F11/13C02F11/00
Inventor 胡沔孙乐涛王军良
Owner ZHEJIANG UNIV OF TECH