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Dehydrating agent for sludge, and preparation and application thereof

A technology of sludge dewatering agent and aqueous solution, which is applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of low dewatering efficiency of oily sludge and difficulty in oil separation, and achieve high dewatering efficiency, low cost, and reduced land occupation. area effect

Inactive Publication Date: 2017-05-03
LYUCHENG INVESTMENT SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a sludge dewatering agent and its preparation and application, to overcome the technical problems of the prior art such as low dewatering efficiency of oily sludge and difficulty in oil separation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] First, prepare a sludge dewatering agent, the sludge dewatering agent contains the following components in mass percentages: 40% of the inorganic oxide component, 60% of polyacrylamide; the inorganic oxide component contains the following parts by weight Components: 12 parts by weight of silicon dioxide, 3 parts by weight of magnesium oxide, 5 parts by weight of aluminum oxide, and 40 parts by weight of iron oxide.

[0038] (1) mixing each component in the inorganic oxide component according to the proportioning ratio to obtain the inorganic oxide component;

[0039](2) Add polyacrylamide aqueous solution to the inorganic oxide component obtained in the step (1) according to the proportion to obtain the sludge dehydrating agent.

[0040] Then, the prepared sludge dewatering agent is used to dehydrate the oily sludge. The oily sludge is oily biochemical sludge in the petrochemical industry, with a water content of 98% and an oil content of about 10%. Get 200 kilograms o...

Embodiment 2

[0043] First, prepare a sludge dewatering agent, the sludge dewatering agent contains the following components in mass percentages: 38% of the inorganic oxide component, 62% of sodium polyacrylate; the inorganic oxide component contains the following parts by weight Components: 14 parts by weight of silicon dioxide, 2 parts by weight of magnesium oxide, 9 parts by weight of aluminum oxide, and 30 parts by weight of iron oxide.

[0044] (1) mixing each component in the inorganic oxide component according to the proportioning ratio to obtain the inorganic oxide component;

[0045] (2) Adding an aqueous solution of sodium polyacrylate to the inorganic oxide component obtained in step (1) according to the proportioning ratio to obtain a sludge dehydrating agent.

[0046] Then, the prepared sludge dewatering agent is used to dehydrate the oily sludge. The oily sludge is oily anaerobic biochemical sludge in the petroleum industry, with a water content of 95% and an oil content of ab...

Embodiment 3

[0049] First, prepare a sludge dewatering agent, the sludge dewatering agent contains the following components in mass percentages: 32% of the inorganic oxide component, 68% of polyacrylamide; the inorganic oxide component contains the following parts by weight Components: 15 parts by weight of silicon dioxide, 5 parts by weight of magnesium oxide, 6 parts by weight of aluminum oxide, and 60 parts by weight of iron oxide.

[0050] (1) mixing each component in the inorganic oxide component according to the proportioning ratio to obtain the inorganic oxide component;

[0051] (2) Add polyacrylamide aqueous solution to the inorganic oxide component obtained in the step (1) according to the proportion to obtain the sludge dehydrating agent.

[0052] Then, the prepared sludge dewatering agent is used to dehydrate the oily sludge. The oily sludge is oily sludge produced in the process of petroleum smelting, with a water content of 85% and an oil content of about 15%. Get 200 kilogr...

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Abstract

The invention specifically relates to a dehydrating agent for sludge, and preparation and application thereof, belonging to the field of stabilization and reduction of sludge. The dehydrating agent for sludge comprises, by weight, 28 to 48 parts of an inorganic oxide component and 52 to 72 parts of an organic polymer component. When the dehydrating agent for sludge is used for treating oily sludge, high dehydration efficiency is obtained, and the water content of the oily sludge is reduced to 30 to 50% or below from original 98% or above; for oily sludge with water content of 95% or above, a water phase, a sludge phase and an oil phase of the oily sludge can be separated via homogenization and uniform mixing effect of the dehydrating agent; and a breakthrough is made to most conventional oil-removing and dehydration manners for oily sludge, and a complementary mode is employed in the invention to conduct key operation in reduction of oily sludge, i.e., separation of a water phase, a sludge phase and an oil phase.

Description

technical field [0001] The invention belongs to the field of sludge stabilization and reduction, and in particular relates to a sludge dewatering agent and its preparation and application. Background technique [0002] Oily sludge refers to a mixture of various forms that may pollute the environment because the oil in it cannot be directly recovered when crude oil or refined oil is mixed into soil or other media. Oily sludge is mainly produced in the process of oil extraction, transportation, refining and oily sewage treatment. These sludges generally contain a large amount of mineral oil, sulfide, and heavy metals, etc., and are accompanied by stench and are extremely toxic. If it is discharged directly without treatment, it will cause great pollution to soil, water and plants in nature. The main characteristics of oily sludge are: (1) high water content and large volume, and a large amount of untreated oily sludge has become a heavy burden on oil fields and refineries; (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/14
Inventor 乔向利乐志芳齐连丽赵斌元
Owner LYUCHENG INVESTMENT SHANGHAI CO LTD
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