A petrochemical oily sludge treatment agent, its preparation method and application

A technology for sludge disposal and disposal agent, applied in the fields of sludge treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of vicious circle, difficulty in sludge dewatering and high solid content, and reduce the The effect of operating expenses, increased demulsification function, and simple preparation method

Active Publication Date: 2020-11-27
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the sewage treatment process of oil refineries in the petrochemical industry, a large amount of "scum" will be produced and cannot be dehydrated, resulting in the failure of subsequent oil, water and mud separation operations, and the overall process will cause a vicious circle
This kind of sludge is universal, and its biggest feature is high solid content and high oil content, which makes it very difficult for sludge dehydration treatment
At present, the sludge treatment is divided into three categories: one is evaporative dehydration, oil and sludge are not separated, and the cost is extremely high; the other is distillation to remove oil, sewage and sludge are dehydrated, and the key is distillation to remove oil The efficiency and whether the obtained distilled oil can be reused, otherwise, on the basis of increasing operating costs, equipment investment is still being made; the third is the sludge dewatering process in the traditional sense, that is, after the traditional sludge dehydrating agent is stirred and treated, Centrifuges are used for water-solid-liquid separation, and belt filter presses or plate-and-frame filter presses are used for sludge treatment. Due to the oil content in the sludge, the water permeability of the sludge is extremely poor, and the filter cloth of the filter press is seriously clogged ( Normal desliming and dehydration cannot be carried out), the water content in the sludge is very high, and the amount of sludge dewatering is very large, which also greatly increases the operating cost of sludge dewatering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Proportion Composition of Petrochemical Oily Sludge Disposal Agent

[0032] Sodium dodecylsulfonate, sodium dodecylbenzenesulfonate, sodium hexadecylbenzenesulfonate, and sodium hexadecylbenzenesulfonate were modified by kneading with diatomaceous earth in a ratio of 1:4. Kneading method: Mix liquid alkyl sulfonate with a mass fraction of 30% and diatomaceous earth in a weight ratio of 1:4, and stir in a rotary mixer for 20 minutes. After drying at a low temperature of 80°C, the obtained samples were labeled as component A, component B, component C, and component D, respectively.

[0033] Sodium hydroxide solid (industrial grade) is formulated into an aqueous solution with a weight percentage of 10%, and the alkali solution and fly ash are mixed and stirred at a ratio of 2:10 until the surface of the fly ash is wetted by the alkali solution, and then dried with The machine dried quickly at 80°C (it only needs half a day to touch without moisture, and it will ...

Embodiment 2

[0038] (1) Taking the oily sludge on the surface of the oil tank of Jilin Petrochemical Refinery as the experimental object, the oil content of the sludge is 5.73%, the water content is 87.36%, and the solid content is 6.91%. Take 500mL of oily sludge into four beakers A, B, C, and D respectively, and add product I, product II, product III, and product IV, stir for 30min, the stirring speed is 1200r / min, let stand for 10min.

[0039] (2) Use a circulating water vacuum pump to filter until the pressure begins to drop, weigh the weight of the mud cake and record it as M (the letter of the beaker represents the weight of the mud cake in the beaker), A is 61.60g, B is 62.39g, and C is 60.44g , D is 64.26g; put the mud cake into the oven and dry it at 60°C, weigh the mud cake as m, the mass of the mud cake in A beaker after drying is 47.01g, B is 47.73g, and C is 46.22g , D is 48.73g.

[0040] (3) According to the formula: solid content rate=m / M×100%, the measured solid content r...

Embodiment 3

[0042] (1) Taking the oily sludge at a depth of 3 meters in the oil tank of Jilin Petrochemical Refinery as the experimental object, the oil content of the sludge is 7.24%, the water content is 86.61%, and the solid content is 6.15%. Put 500mL of sludge into four beakers A, B, C, and D respectively, add product I, product II, product III, and product IV to ABCD according to the dosage of 30g / L, stir for 30min, and the stirring speed 1200r / min, let stand for 10min.

[0043] (2) Use a circulating water vacuum pump to filter until the pressure begins to drop, weigh the weight of the mud cake as M, A is 58.16g, B is 59.45g, C is 59.71g, and D is 57.48g; put the mud cake into the oven , dried at 60°C, weighed the mass m of the dried mud cake, A was 45.57g, B was 45.96g, C was 45.78g, and D was 44.92g.

[0044] (3) According to the formula: solid content rate=m / M×100%, the measured solid content rates of A, B, C, and D are 78.43%, 77.31%, 76.67%, and 78.15%, respectively.

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Abstract

The invention provides a petrochemical oily sludge disposal agent. The petrochemical oily sludge disposal agent comprises the following components in parts by weight: 1 part of alkane sulfonate, 3 to5 parts of diatomite, 30 to 50 parts of alkali modified fly ash, 3 to 8 parts of a polymeric flocculant and 3 to 8 parts of hydroxide. The hydroxide is calcium hydroxide and / or magnesium hydroxide. The invention also provides preparation and application of the petrochemical oily sludge disposal agent. Alkane sulfonate modified diatomite is adopted as an oil demulsification adsorbent, the disposalproblem of oily sludge is effectively solved, and the diatomite has good oil absorption performance, so that original characteristics of oil phase are lost, and the diatomite is easy for subsequent disposal. Coal ash has good water permeability, and is beneficial for further disposal of subsequent dehydration, and the coal ash is cheap as an industrial waste material, so that the whole operating cost is reduced. The preparation method of the oily sludge disposal agent provided by the invention is simple, convenient in application and easy for popularization.

Description

technical field [0001] The invention belongs to the field of sludge treatment, and in particular relates to a treatment agent for oily sludge and its preparation and application. Background technique [0002] During the sewage treatment process of oil refineries in the petrochemical industry, a large amount of "scum" will be generated and cannot be dehydrated, resulting in the failure of subsequent oil, water and mud separation operations, and the overall process will cause a vicious circle. This kind of sludge is universal, and its biggest feature is high solid content and high oil content, which makes it very difficult for sludge dehydration treatment. At present, the sludge treatment is divided into three categories: one is evaporative dehydration, oil and sludge are not separated, and the cost is extremely high; the other is distillation to remove oil, sewage and sludge are dehydrated, and the key is distillation to remove oil The efficiency and whether the obtained dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/148
Inventor 杜玉成张丰李强李杨吴俊书王学凯祁超
Owner BEIJING UNIV OF TECH
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