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Treatment method of Fischer-Tropsch synthetic reaction wastewater

A technology of Fischer-Tropsch synthesis and treatment method, applied in water/sewage multi-stage treatment, neutralized water/sewage treatment, oxidized water/sewage treatment, etc. The separation method is not applicable and other problems, to achieve the effect of saving water resources and reducing energy consumption

Active Publication Date: 2012-12-26
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the treatment methods involving Fischer-Tropsch synthesis reaction water all include distillation and separation operations. To heat such a large amount of water to above 100°C for distillation operation consumes a lot of energy and costs, and does not conform to the principle of energy saving.
Especially when the content of organic oxygen-containing compounds in the Fischer-Tropsch reaction water is low, the method of distillation and rectification separation is not applicable in terms of economic benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Add 1L of Fischer-Tropsch synthesis reaction wastewater into a beaker, stir for 4 hours at room temperature, add 5.0ml of hydrogen peroxide, stir for 4 hours, then add 5.0g of calcium hydroxide, stir for 2 hours, filter, and then carry out biochemical treatment. The treatment adopts the combined treatment process of UASB treatment device and biological contact oxidation device, adding anaerobic flocculent sludge and coal gasification sludge to the anaerobic reactor and biological contact oxidation reactor respectively, and the added volume is 50% of the reactor volume , and then add urea, and sodium dihydrogen phosphate. The operating conditions of the biochemical treatment device are: temperature 32°C, pH value 7.5, residence time 2 days. After the biochemical treatment, the treated water samples were taken for analysis, and the results are shown in Table 1.

Embodiment 2

[0056] Add 1L of Fischer-Tropsch synthesis reaction wastewater into a beaker, stir for 4 hours at room temperature, add 8.0ml of hydrogen peroxide, stir for 4 hours, then add 5.0g of calcium hydroxide, stir for 2 hours, filter, and then carry out biochemical treatment, the treatment conditions are the same as the implementation Example 1, the treated water samples were taken for analysis, the results are shown in Table 1.

Embodiment 3

[0058] Add 1L Fischer-Tropsch synthesis reaction wastewater into a beaker, blow air in for 4 hours at room temperature, add 5.0ml of hydrogen peroxide, blow in air for 4 hours, then add 5.0g of calcium hydroxide, blow in air for 2 hours, filter, and then perform biochemical Processing, processing condition is the same as embodiment 1, gets the treated water sample and analyzes, and the results are shown in Table 1.

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Abstract

The invention relates to a treatment method of the Fischer-Tropsch synthetic reaction wastewater. The method comprises the following steps: aerating the Fischer-Tropsch synthetic reaction wastewater, oxidizing, neutralizing, filtering, performing biochemical treatment, softening, performing ion exchange and / or membrane separation treatment, etc. The treatment method is characterized in that the oxygen-containing compounds in the Fischer-Tropsch synthetic reaction wastewater are removed by a method and the method comprises the following steps: adding oxidant in the Fischer-Tropsch synthetic reaction wastewater, selectively adding pro-oxidant to ensure that the organic oxygen-containing compounds in the wastewater are oxidized to the corresponding acids; using calcium oxide or calcium hydroxide to neutralize the acids and form calcium salt precipitate and filtering to remove the precipitate. By adopting the method of the invention, the oxygen-containing compounds in the Fischer-Tropsch synthetic reaction wastewater can be effectively removed; and the total removal rate is more than 98% and the treated Fischer-Tropsch reaction wastewater can meet the quality standard of cooling water or boiler water.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular, the invention relates to a Fischer-Tropsch synthesis reaction wastewater treatment method. Background technique [0002] Indirect liquefaction of coal to synthesize oil is one of the important ways to solve the shortage of oil in our country. The Fischer-Tropsch reaction is the core reaction of indirect coal liquefaction. In addition to hydrocarbons, a variety of organic oxygen-containing compounds, such as alcohols, acids, aldehydes, ketones and / or esters, are also produced during the Fischer-Tropsch reaction. Water, usually more than one ton of water is associated with the production of one ton of oil. Since the generated water contains a variety of oxygen-containing compounds such as alcohols, aldehydes, acids, etc., and the acids contained in it have a great corrosion effect on equipment; Reaction wastewater cannot be recycled, it must be treated, especially in the situation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/72C02F1/66C02F1/42
Inventor 张怀科任杰李永旺
Owner SYNFUELS CHINA TECH CO LTD
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