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Method for treating oil sludge at the bottom of crude oil storage tank

A crude oil storage tank and treatment method technology, which is applied in the field of treatment of sludge at the bottom of crude oil storage tanks, can solve the problems of waste of resources and long treatment period of sludge at the bottom of the tank, and achieve the effects of reducing treatment cost, reducing quality impact and rapid separation

Inactive Publication Date: 2020-06-05
QINGDAO ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a treatment method for oil sludge at the bottom of crude oil storage tanks, so as to solve the problems of long treatment period and waste of resources in the prior art proposed in the background art

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  • Method for treating oil sludge at the bottom of crude oil storage tank
  • Method for treating oil sludge at the bottom of crude oil storage tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for processing oil sludge at the bottom of a crude oil storage tank, comprising the following steps:

[0029] S1. Put the oil sludge cleaned from the crude oil storage tank into the tempering tank, add water to adjust the slurry, and make the water content of the oil sludge reach 20%. When adding water to the oil sludge, use a metering pump to control the amount of water added, and adjust the speed of the tempering tank The stirring reaction was carried out at 100r / min, the reaction temperature was set at 50°C, and the reaction time was 20min to obtain oily slurry;

[0030] S2. Pump the oil sludge in S1 into the oil sludge separation tank through the sludge pump, filter and separate through the filter, the stirring speed is 60r / min, the temperature is 70°C, and the separation time is set to 20min according to the different properties of the oil sludge ;

[0031] S3. Transfer the crude oil separated by S2 filtration to the crude oil tank, and transfer the remai...

Embodiment 2

[0034] Different from Example 1, the processing method of oil sludge at the bottom of the crude oil storage tank comprises the following steps:

[0035] S1. Put the oil sludge cleaned from the crude oil storage tank into the tempering tank, add water to adjust the slurry, and make the water content of the oil sludge reach 25%. When adding water to the oil sludge, use a metering pump to control the amount of water added, and adjust the speed of the tempering tank The stirring reaction was carried out at 60r / min, the reaction temperature was set at 70°C, and the reaction time was 30min to obtain oily slurry;

[0036] S2. Pump the oil sludge in S1 into the oil sludge separation tank through the sludge pump, filter and separate through the filter screen, the stirring speed is 100r / min, the temperature is 80°C, and the separation time is set to 30min according to the different properties of the oil sludge ;

[0037] S3. Transfer the crude oil separated by S2 filtration to the crud...

Embodiment 3

[0039] Different from embodiment 2, the processing method of oil sludge at the bottom of the crude oil storage tank comprises the following steps:

[0040]S1. Put the oil sludge cleaned from the crude oil storage tank into the tempering tank, add water to adjust the slurry, and make the water content of the oil sludge reach 23%. When adding water to the oil sludge, use a metering pump to control the amount of water added and adjust the speed of the tempering tank The stirring reaction was carried out at 80r / min, the reaction temperature was set at 60°C, and the reaction time was 25min to obtain oily slurry;

[0041] S2. Pump the oil sludge in S1 into the oil sludge separation tank through the sludge pump, filter and separate through the filter, the stirring speed is 80r / min, the temperature is 75°C, and the separation time is set to 25min according to the different properties of the oil sludge ;

[0042] S3. Transfer the crude oil separated by S2 filtration to the crude oil t...

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Abstract

The invention discloses a method for treating oil sludge at the bottom of a crude oil storage tank. The method comprises: adding oil sludge cleaned out of the crude oil storage tank into a tempering tank, adding water for slurry mixing treatment to enable the water content of the oil sludge to reach 20-25% to obtain oil slurry, with a metering pump being used for controlling the water adding amount while water is added into the oil sludge, and the reaction time being 20-30 min; pumping the oil slurry into an oil sludge separation tank through a sludge pump, filtering and separating through a filter screen, with the separation time being set as 20-30 min; transferring the filtered and separated crude oil to the crude oil tank, transferring the residual oil sludge with very low oil content to a hazardous waste collection place, and carrying out centralized incineration treatment. According to the method, the reaction conditions are simple, operation is convenient, rapid separation of theoil sludge is achieved through a physical method according to the specific reaction sequence and the reaction conditions, the deoiling rate reaches up to 80% or above, crude oil resources are saved,and pollution of the oil sludge to the environment is reduced. In addition, the separated crude oil can be recycled.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment at the bottom of crude oil storage tanks, and in particular relates to a treatment method for sludge at the bottom of crude oil storage tanks. Background technique [0002] When crude oil is stored in the storage tank for a long time, inorganic impurities such as high melting point wax, asphaltene, colloid and entrained sediment in the crude oil will become sediment together with water, forming tank bottom sludge at the bottom of the storage tank. Reduce the effective capacity of the storage tank; therefore, the tank bottom sludge needs to be cleaned regularly. [0003] The oil tank bottom mud contains about 25% water and 5% inorganic matter (such as mud sand), and the remaining 70% is hydrocarbons (7-8% of asphaltene, 6% of paraffin, and 48% of ashes) ; At the same time, the oil sludge contains a variety of heavy metal ions and toxic and harmful organic substances, which are very harmfu...

Claims

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Application Information

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IPC IPC(8): C10G1/00
CPCC10G1/00C10G2300/1003
Inventor 薛鲁燕蔡葵张诗航赵征宇张瑞巧孙海红张海峰赵爱鸿孙永红王文娇范珒辉石大川
Owner QINGDAO ACAD OF AGRI SCI