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Process for treating oil-containing waste water for ship

A waste water treatment and ship technology, applied in the direction of water/sewage multi-stage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve the inconvenience of installation, use and maintenance, poor pollutant removal ability, equipment Complex structure and other issues, to achieve the effect of long service life, small volume and high adsorption capacity

Inactive Publication Date: 2012-05-23
浙江瑞普环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problems existing in the prior art, such as poor removal of emulsified and dissolved oil pollutants, many processing steps, high processing costs, complicated equipment structure, large system occupation, and inconvenient installation, use and maintenance. And other issues

Method used

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  • Process for treating oil-containing waste water for ship
  • Process for treating oil-containing waste water for ship

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] according to figure 1 In the shown ship oily wastewater treatment process, the raw water is ship oily wastewater with an oil content of 446.0mg / L and a turbidity of 166NTU.

[0040] 1. Primary filtration treatment

[0041] The pretreated oily wastewater is pumped into the upper water inlet of the filter through the water inlet pump and flowmeter. The filter is composed of a shell and a 10μm filter element. The water inlet flow rate is 15m3 / hr, and the water inlet pressure is 0.25MPa; the empty bed filtration speed 4m / h.

[0042] 2. Coalescing and filtering

[0043] After the primary filter, the oily wastewater enters the horizontal coalescing filter, and after treatment, it enters the intermediate water tank. The coalescing filter consists of a housing, an oil sump and a coalescing filter element. There are 5 coalescing filter elements installed in the coalescing filter. The inner diameter of the coalescing filter element is Φ50mm, the outer diameter is Φ80mm, and t...

Embodiment 2

[0048] according to figure 1 In the shown ship oily wastewater treatment process, the raw water is ship oily wastewater with an oil content of 231.6mg / L and a turbidity of 172NTU.

[0049] The influent flow rate of the primary filtration treatment is 25m3 / hr, the water inlet pressure is 0.3MPa; the filtration speed is 5m / hr, and the others are the same as in Example 1.

[0050] The residence time of the coalescing filter unit during the coalescing and filtering process is 15 minutes, and the others are the same as in Example 1.

[0051] The flow rate of the organic adsorption filtration separation treatment is 6m / hr, and the water inlet pressure is 0.2Mpa. Others are the same as in Example 1.

Embodiment 3

[0053] according to figure 1 In the shown ship oily wastewater treatment process, the raw water is ship oily wastewater with an oil content of 447.9mg / L and a turbidity of 129NTU.

[0054] The primary filtration treatment influent flow rate is 50m3 / hr, the water inlet pressure is 0.35Mpa, and the filtration speed is 7.5m / hr, the others are the same as in Example 1.

[0055] The residence time of the filter unit during the coalescing filtration process was 25 minutes, and the others were the same as in Example 1.

[0056] The flow rate of the organic adsorption filtration treatment is 8m / hr, and the pressure of the water is 0.4Mpa. Others are the same as in Example 1.

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Abstract

The invention relates to a process for treating oil-containing waste water for a ship. The process comprises the following technical steps of: performing solid and liquid separation, coalescing separation treatment, adsorbing separation treatment and the like on pretreated ship oil-containing waste water sequentially. When the oil content in supplied water is less than or equal to 500 mg / L and the turbidity of the supplied water is less than or equal to 200 NTU, the oil content in discharged water quality is less than or equal to 1 mg / L and the turbidity of the discharged water quality is less than or equal to 5 NTU; and the national standard of the Integrated Pollutant Discharge Standard GB8978-1996 can be met. The method is high in treatment capacity of purifying the oil-containing waste water, namely the waste water treatment amount is up to 10 to 100 m<3> / hr, and is high in purifying efficiency, namely the oil removal rate is more than 99 percent and the turbidity removal rate is more than 90 percent. The process for treating the oil-containing waste water for the ship can be also applied to various types of oil-containing waste water, such as oil-field reinjected water, oil-base oil-containing waste water, metallurgical oil-containing waste water, steel factory oil-containing waste water, machined oil-containing waste water and the like, so that the treated oil-containing waste water can be treated until reaching the standard, and waste oil resources can be recycled.

Description

technical field [0001] The invention relates to a process for treating oily waste water, in particular to a process for treating oily waste water suitable for ships. Background technique [0002] The harm caused by the oily sewage produced by ships to the ocean or river includes destroying the ecological balance, polluting the source of domestic and production water and destroying the coastal landscape. [0003] Engine room bilge water and ballast water are the main sources of ship oily sewage. At present, the ship's ballast water can generally be treated in a centralized manner, while the engine room bilge water is difficult to achieve centralized treatment on the shore. The oil content of engine room bilge water can be as high as 50000mg / L, and its annual discharge is about 10% of the total tonnage of the ship. The pollution caused by such huge oily sewage to rivers, lakes and seas is incalculable. Therefore, it is imperative to develop a shipborne sewage treatment syste...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F1/28
Inventor 李光辉陆方
Owner 浙江瑞普环境技术有限公司
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