Method for preparing ceramsite from oily sludge

A technology of sludge and ceramsite, which is applied in the field of resource treatment of oily sludge, can solve the problems of high cost, lack of reasonable recovery, difficulty in resource utilization of oily sludge, etc. Low, the effect of improving the degree of resource utilization

Active Publication Date: 2021-07-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems in the prior art that resource utilization of oily sludge is difficult, costly and lacks effective methods for reasonable recovery, the present invention provides a method for preparing ceramsite from oily sludge, which is to carry out oily sludge Decomposition, realizes the reduction of sludge, and also prepares ceramsite with high economic value, realizing resource utilization

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  • Method for preparing ceramsite from oily sludge
  • Method for preparing ceramsite from oily sludge
  • Method for preparing ceramsite from oily sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) The raw material oily sludge enters the cyclone to remove solids larger than 100 μm in the material; it is mechanically dehydrated by the screw stacker, and the moisture content of the output is tested to be 68.32wt%;

[0039] (2) After heating the discharged material to 170°C with steam, fully mix it with solvent oil at 250~380°C, the ratio of the added amount to the mass of the material is 7:1, and stir at 200r / min for 70min under heat preservation conditions to fully react;

[0040] (3) Let the product of step (2) stand still, and perform solid-liquid separation after the system is layered;

[0041] (4) After the separated liquid phase is separated from oil and water, the petroleum components can be recovered, the solid phase is dried, and 30% hydrogen peroxide solution is added. The mass ratio of hydrogen peroxide solution to solid phase is 1.7:1 After standing for 30 minutes, the solids were separated, granulated, and made into 5mm spherical particles, placed i...

Embodiment 2

[0043] (1) The raw material oily sludge enters the filter to remove solids larger than 100 μm in the material; mechanical dehydration is carried out through the screw stacker, and the moisture content of the discharged material is tested to be 64.02wt%;

[0044] (2) After heating the discharged material to 190°C with steam, fully mix it with solvent oil at 280~400°C, the ratio of the added amount to the material mass is 8:1, and stir at 250r / min for 60min under heat preservation conditions to fully react;

[0045] (3) Let the product of step (2) stand still, and perform solid-liquid separation after the system is layered;

[0046] (4) After the separated liquid phase is separated from oil and water, the petroleum components can be recovered, the solid phase is dried, and 30% hydrogen peroxide solution is added. The mass ratio of hydrogen peroxide solution to solid phase is 1.5:1 After standing for 30 minutes, the solids were separated and granulated to make 8mm spherical parti...

Embodiment 3

[0048] (1) The raw material oily sludge enters the centrifuge to remove solids larger than 100 μm in the material; it is mechanically dehydrated by the screw stacker, and the moisture content of the output is tested to be 58.94wt%;

[0049] (2) After heating the discharged material to 180°C with steam, fully mix it with solvent oil at 150~300°C, the ratio of the added amount to the mass of the material is 8:1, and stir at 230r / min for 80min under heat preservation conditions to fully react;

[0050] (3) Let the product of step (2) stand still, and perform solid-liquid separation after the system is layered;

[0051] (4) After the separated liquid phase is separated from oil and water, the petroleum components can be recovered, the solid phase is dried, and 30% hydrogen peroxide solution is added. The mass ratio of hydrogen peroxide solution to solid phase is 2:1 After standing for 30 minutes, the solid was separated and granulated to make 4mm spherical particles, placed in an ...

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Abstract

The invention relates to a method for preparing ceramsite from oily sludge, which comprises the following steps: carrying out solid separation on the oily sludge to remove large-particle solids in the oily sludge; carrying out dehydration treatment until the water content is less than or equal to 70wt%, carrying out steam heating, adding distillate oil with the distillation range of 100-400 DEG C as a treating agent, carrying out a reaction, carrying out solid-liquid separation, drying the obtained solid, adding a cleaning agent, performing standing, separating out the solid, granulating, drying and roasting to obtain the ceramsite finished product. Under the synergistic effect of the distillate oil treating agent and the cleaning agent, the purpose of recovering the distillate oil in the oily sludge is achieved. The whole operation process is a closed loop, generated sump oil is recycled, generated solids are prepared into ceramsite with a high additional value, the recycling degree of the oily sludge is greatly improved, the added medicament is environment-friendly, the generated wastewater is low in salt content and simple to treat, and environmental pollution is not caused; the whole method does not involve high-temperature and high-pressure operation, and is economical and safe.

Description

technical field [0001] The invention relates to the technical field of resource treatment of oily sludge, in particular to a method for preparing ceramsite from oily sludge. Background technique [0002] Oily sludge is a mixture of oil, mud, water, and even other pollutants. At present, my country's petrochemical industry produces about 3×10 6 t oily sludge. Oily sludge contains odorous, toxic and harmful substances, which seriously endanger human health. It has been listed as hazardous solid waste and included in the hazardous waste management system. At present, the main treatment method is pyrolysis, which not only cannot recover valuable components, but also produces waste residue, high-concentration waste gas, and waste water during the operation, which are hazardous wastes that are difficult to further process. Neither reduction nor resource utilization has been achieved well. [0003] Ceramsite is a granular or columnar shape made by high-temperature sintering or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/132C04B33/30C04B33/32
CPCC04B33/1321C04B33/1328C04B33/30C04B33/32C04B2235/6562C04B2235/77C04B2235/96Y02P40/60
Inventor 孙浩程回军刘春阳李宝忠王宜迪
Owner CHINA PETROLEUM & CHEM CORP
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