Method for preparing oily sludge blended coal water slurry by using fluorine-containing polycarboxylic acid dispersing agent through ultrasonic dispersion

A fluorine-containing polycarboxylic acid and ultrasonic dispersion technology, which is applied in the field of coal-water slurry pulping, can solve problems such as the inability to meet the stability and slurry-forming requirements of coal-water slurry pulping, high sludge composition requirements, and increased process links. Achieve the effect of improving stability and uniformity, high coal slurry concentration, and improving dispersion

Active Publication Date: 2015-05-27
SHAANXI YANCHANG PETROLEUM GRP
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Problems solved by technology

[0004] Chinese patent CN201010183569.8 mixes oil sludge directly with coal, water and additives into the coal mill. Although the oil sludge can be pulped, the requirements for the oil sludge composition are high and the adaptability to the oil sludge is poor, which cannot meet the actual production due to the fluctuation of the oil sludge components. CWS slurrying stability and slurrying requirements caused by large
Its main defect is that it needs to use the finished coal-water slurry, which leads to an increase in process links, thereby increasing the cost of pulping; in addition, it is more effective for sludge pulping, but its pulping performance is poor for oily sludge with high organic content
Chinese patent CN100580317C discloses a "urban sludge resource treatment and utilization method", which mixes urban sewage cement with coal for direct pulping, but because the slurry is stabilized only by adding a stabilizer, it has a high oil content for organic matter Sludge pulping is poor

Method used

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  • Method for preparing oily sludge blended coal water slurry by using fluorine-containing polycarboxylic acid dispersing agent through ultrasonic dispersion
  • Method for preparing oily sludge blended coal water slurry by using fluorine-containing polycarboxylic acid dispersing agent through ultrasonic dispersion
  • Method for preparing oily sludge blended coal water slurry by using fluorine-containing polycarboxylic acid dispersing agent through ultrasonic dispersion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Taking the "three muds" produced in the sewage workshop of an oil refinery in northern Shaanxi and the oil sludge at the bottom of a crude oil settlement tank of an oil production plant combined station in northern Shaanxi mixed at a mass ratio of 1:6 as an example, the initial water content is 60%, and the oil content is 60%. 30% of similar substances and 10% of mud content. The specific pulping method is as follows:

[0023] 1. Ultrasonic quenching and tempering treatment of oil sludge

[0024] Such as figure 1 As shown, the oil sludge is separated by flocculation and sedimentation with zwitterionic polyacrylamide with a weight-average molecular weight of 15,000 Daltons, and the amount added is 0.3% of the weight of the oil sludge. Separation, to obtain the oil sludge of reduction and separation treatment, which contains 40% water, 40% oil, and 20% mud. The oil sludge after reduction and separation treatment is transferred to the machine with mechanical stirring and ...

Embodiment 2

[0031] Taking the oil sludge at the bottom of a crude oil settlement tank of an oil production plant combined station in northern Shaanxi as an example, its initial water content is 35%, oily substance 40%, and mud content 25%. The specific pulping method is as follows:

[0032] 1. Ultrasonic quenching and tempering treatment of oil sludge

[0033] Such as figure 1 As shown, the oil sludge is separated by flocculation and sedimentation with zwitterionic polyacrylamide with a weight-average molecular weight of 12,000 Daltons, and the amount added is 0.3% of the mass of the oil sludge. Separation, to obtain the oil sludge of reduction and separation treatment, which contains 40% water, 30% oil, and 30% mud. The oil sludge after reduction and separation treatment is transferred to the machine with mechanical stirring and ultrasonic strengthening dispersing device by screw conveyor 1. In the sludge conditioning tank 2, the temperature of the sludge is raised to 50°C under stirrin...

Embodiment 3

[0040] 1. Ultrasonic quenching and tempering treatment of oil sludge

[0041] Such as figure 1 As shown, the oil sludge after the reduction and separation treatment is transferred to the oil sludge conditioning tank 2 with mechanical stirring and ultrasonic enhanced dispersion device with the screw conveyor 1, and the oil sludge is heated to 90°C under the stirring condition, and the power is 30kW 1. Ultrasonic waves with a frequency of 500 MHz pre-disperse the oil sludge in the oil sludge conditioning tank 2 for 1 second to obtain oil sludge after conditioning.

[0042] 2. Sludge mixed with coal water slurry to make pulp

[0043] The conditioned oil sludge, coal, water and fluorine-containing polycarboxylic acid dispersant are sent to the wet-process rod-shaped coal mill 3 for coal-water slurry slurrying, wherein the amount of oil sludge added is 10% of the total coal-water slurry mass, containing Fluoropolycarboxylic acid dispersant addition is 1.0% of total coal-water slu...

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Abstract

The invention discloses a method for preparing oily sludge blended coal water slurry by using a fluorine-containing polycarboxylic acid dispersing agent through ultrasonic dispersion. The method comprises the following steps: firstly, dispersing components of oily sludge through ultrasonically intensified mass transfer, so as to improve the stability and the uniformity of an oily sludge system, subsequently adding the fluorine-containing polycarboxylic acid dispersing agent in the process that the oily sludge is blended with the coal water slurry, so that oil, water and sludge form a uniform and stable system; dispersing the prepared coal water slurry by using the ultrasonic waves after the oily sludge is blended into the coal water slurry to prepare slurry, so that the stability and the uniformity of the coal water slurry are further improved and the prepared coal water slurry has relatively high coal slurry concentration, good flowability and good slurry forming stability. The needed equipment is simple, the oily sludge treatment efficiency is high, the oily sludge which is tempered by using the ultrasonic waves can be directly blended with coal to prepare the coal water slurry which can be gasified for use in a conventional coal water slurry preparation process, a guarantee is provided when the oily sludge resource is utilized to be blended into the coal water slurry, harmless treatment and resource utilization of the oily sludge are achieved, and relatively high industrial application values are achieved.

Description

technical field [0001] The invention belongs to the technical field of coal-water slurry making, and in particular relates to a slurry-making method based on ultrasonic dispersion technology and fluorine-containing polycarboxylic acid dispersant mixed with oil sludge and coal-water slurry. Background technique [0002] Coal-water slurry is a new type of high-efficiency and clean coal-based fuel that is physically ground and mixed with coal, water and additives in a certain proportion. Coal-water slurry has the characteristics of high combustion efficiency and low pollutant emission, and can be used in power plant boilers , Industrial boilers and industrial kilns replace oil, gas, and coal combustion, which is an important part of today's clean coal technology. In my country, coal water slurry is mainly used for pressurized coal gasification to prepare synthesis gas and then to synthesize ammonia and methanol industry. It is the leader of coal chemical industry. Coal-water s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/32C10L1/20C10L1/236
Inventor 扈广法杨东元齐永红王燕李霁阳许磊姚彬
Owner SHAANXI YANCHANG PETROLEUM GRP
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