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Method for treating tank cleaning oil sludge

A technology for sludge and tank cleaning, applied in sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems such as separation, and achieve the effects of high safety, low cost and little secondary pollution

Pending Publication Date: 2021-01-19
陕西欧菲德环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for treating tank cleaning oil sludge to solve the technical problem of effective separation of oil, water and solid phases in the sludge treatment process, and to use medicaments to clean and separate tank cleaning sludge in a water washing device to realize the upper oil phase , high-efficiency separation of solid phases such as the middle water phase and the lower layer of sediment, treat and separate the emulsified oil in the water phase, and recover the oil phase, so as to realize the reduction treatment and resource recovery of oily sludge

Method used

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  • Method for treating tank cleaning oil sludge
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Embodiment 1

[0026] A method for processing tank cleaning oil sludge, comprising the following steps:

[0027] Step 1: Use a screen with a mesh size of 2 mm to filter the No. 1 tank cleaning sludge to remove impurities, and seal it for use;

[0028] Step 2: According to the ratio of solid-liquid mass ratio of 1:3, water is added to the clear tank sludge, and stirred evenly to form a solid-liquid mixture;

[0029] Step 3: Add a cleaning agent to the solid-liquid mixture, then wash at 80°C for 30 minutes, and separate layers; the weight ratio of the cleaning agent to the solid-liquid mixture is 0.8%; the cleaning agent is in the following weight ratio Composition: polyethylene glycol octylphenyl ether: octadecyl glucoside: sodium hydroxide: polyacrylamide = 20:10:69.9:0.1.

[0030] Step 4: Scrape off the slick oil, drain 80% of the total amount of the supernatant, centrifuge the layered sludge and the remaining supernatant, dry the centrifuged sludge at 40°C, and measure the amount of resid...

Embodiment 2

[0032] A method for processing tank cleaning oil sludge, comprising the following steps:

[0033] Step 1: Use a screen with a mesh size of 2mm to filter the oil sludge in the tank to remove impurities, and seal it for use;

[0034] Step 2: According to the ratio of solid-liquid mass ratio of 1:4, water is added to the clear tank sludge, and stirred evenly to form a solid-liquid mixture;

[0035] Step 3: Add a cleaning agent to the solid-liquid mixture, then wash at 60°C for 50 minutes, and statically separate layers; the weight ratio of the cleaning agent to the solid-liquid mixture is 0.9%; the cleaning agent is composed according to the following weight ratio : polyethylene glycol octylphenyl ether: octadecyl glucoside: sodium hydroxide: polyacrylamide = 20: 10: 69.9: 0.1.

[0036] Step 4: Scrape off the slick oil, drain 90% of the total supernatant, centrifuge the stratified oil sludge and the remaining supernatant, dry the centrifuged oil sludge at 40°C, and measure the r...

Embodiment 3

[0038] A method for processing tank cleaning oil sludge, comprising the following steps:

[0039] Step 1: Use a screen with a mesh size of 3 mm to filter the oil sludge in the tank to remove impurities, and seal it for use;

[0040] Step 2: According to the ratio of solid-liquid mass ratio of 1:5, water is added to the clear tank sludge, and stirred evenly to form a solid-liquid mixture;

[0041] Step 3: Add a cleaning agent to the solid-liquid mixture, then wash at 50°C for 60 minutes, and then separate into layers; the weight ratio of the cleaning agent to the solid-liquid mixture is 1.1%; the cleaning agent is composed according to the following weight ratio : polyethylene glycol octylphenyl ether: octadecyl glucoside: sodium hydroxide: polyacrylamide = 20: 10: 69.9: 0.1.

[0042] Step 4: Scrape off the slick oil, drain 90% of the total supernatant, centrifuge the stratified oil sludge and the remaining supernatant, dry the centrifuged oil sludge at 40°C, and measure the r...

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Abstract

The invention discloses a method for treating tank cleaning oil sludge, and the method comprises the following steps: filtering tank cleaning oil sludge by using a screen to remove impurities, and sealing for later use; adding water into the tank cleaning oil sludge, and uniformly stirring to form a solid-liquid mixed solution; adding a cleaning agent into the solid-liquid mixed solution, performing cleaning for 30-60 minutes at the temperature of 50-80 DEG C, and performing standing for layering; finally, scraping off the floating oil, discharging most of supernatant, centrifugally separatinglayered oil sludge and residual supernatant, drying the centrifuged oil sludge at the temperature of 40 DEG C, and measuring the residual oil amount of the oil sludge. According to the invention, thetank cleaning oil sludge is cleaned and separated in the water washing device by using a medicament, so high-efficiency separation of solid phases such as an upper-layer oil phase, a middle-layer water phase, lower-layer silt and the like is realized, emulsified oil in the water phase is treated and separated, the oil phase is recovered, and reduction treatment and resource recycling of the oil-containing sludge are realized.

Description

technical field [0001] The invention belongs to the field of oily sludge treatment, in particular to a method for efficiently separating oil-water-solid three-phase in oily sludge in clear tanks by using a compound medicament, and belongs to the technical field of environmental restoration. Background technique [0002] Tank clearing sludge mainly comes from two aspects: one is produced in the process of oil production sewage treatment, due to the specific gravity factors of the fine particles (mud, sand, etc.) A small amount of crude oil sinks to the bottom of the oil removal tank, and then forms black, fine-grained, oily sludge; on the other hand, it is produced during crude oil storage. When oil storage tanks store oil, especially crude oil, During long-term storage, a small amount of mechanical impurities, sand, soil, heavy metal salts, and heavy oily components such as paraffin and asphaltene in the oil will naturally settle and accumulate at the bottom of the oil tank ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/13C02F11/148
CPCC02F11/00C02F11/148C02F11/13
Inventor 梁庆田巍李熙民
Owner 陕西欧菲德环保科技有限公司
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