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A device and method for improving the purity of acetylene gas while removing mercury from mercury-containing wastewater

A technology of acetylene gas and acetylene gas tank, which is applied in chemical instruments and methods, purification/separation of hydrocarbons, water pollutants, etc., to achieve the effects of reducing sodium hypochlorite consumption, low energy consumption, and simple process flow

Active Publication Date: 2021-04-06
XINJIANG HUATAI HEAVY CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this mercury removal process not only needs to add sodium hydrosulfide or sodium sulfide, but also uses a lot of electrical equipment

Method used

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  • A device and method for improving the purity of acetylene gas while removing mercury from mercury-containing wastewater
  • A device and method for improving the purity of acetylene gas while removing mercury from mercury-containing wastewater

Examples

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Embodiment 1

[0035] The device for improving the purity of acetylene gas while removing mercury from mercury-containing wastewater of this embodiment includes a cooling tower 1, an acetylene gas cabinet 2, a booster 3, a clean first tower 4, and a clean second tower 5, the acetylene gas cabinet 2 The gas outlet is sequentially connected to the booster 3, the first clean tower 4 and the second clean tower 5, and also includes a mercury-containing waste water scrubber 6;

[0036] The mercury-containing wastewater washing tower 6 includes a tower body, the bottom side wall of the tower body is provided with an air inlet, and is connected with the air outlet of the cooling tower 1;

[0037] The top of the tower body is provided with an air outlet, and is connected with the air inlet of the acetylene gas cabinet 2;

[0038] The upper side wall of the tower body is provided with a liquid inlet, and is connected with the mercury-containing waste water collection tank 8 through the first lift pump...

Embodiment 2

[0049] The device for improving the purity of acetylene gas while removing mercury from mercury-containing wastewater in this embodiment is the same as that in Embodiment 1.

[0050] A method for improving the purity of acetylene gas while using the above-mentioned device to remove mercury from mercury-containing wastewater comprises the following steps:

[0051] Step 1: the crude acetylene gas enters the cooling tower 1 for cooling, the volume percentage of hydrogen sulfide gas in the crude acetylene gas is 0.065%, and the cooled crude acetylene gas enters the mercury-containing waste water washing tower 6;

[0052] Step 2: The mercury-containing wastewater from the mercury-containing wastewater collection tank 8 is lifted by the first lift pump 7 into the liquid inlet of the mercury-containing wastewater washing tower 6, and the mercury content in the mercury-containing wastewater is 29 μg / mL;

[0053] Step 3: Mercury-containing wastewater flows down from the upper part of the...

Embodiment 3

[0058] The device for improving the purity of acetylene gas while removing mercury from mercury-containing wastewater in this embodiment is the same as that in Embodiment 1.

[0059] A method for improving the purity of acetylene gas while using the above-mentioned device to remove mercury from mercury-containing wastewater comprises the following steps:

[0060] Step 1: the crude acetylene gas enters the cooling tower 1 for cooling, the volume percentage of hydrogen sulfide gas in the crude acetylene gas is 0.070%, and the cooled crude acetylene gas enters the mercury-containing waste water washing tower 6;

[0061] Step 2: The mercury-containing wastewater from the mercury-containing wastewater collection tank 8 is lifted by the first lift pump 7 into the liquid inlet of the mercury-containing wastewater washing tower 6, and the mercury content in the mercury-containing wastewater is 32 μg / mL;

[0062] Step 3: Mercury-containing wastewater flows down from the upper part of t...

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Abstract

The invention discloses a device and a method for improving the purity of acetylene gas while removing mercury from mercury-containing wastewater, belonging to the technical field of environmental protection technology. The device includes a cooling tower, an acetylene gas tank, a booster, a first clean tower, a second clean tower, and a mercury-containing waste water washing tower. The device of the present invention has a simple structure, which not only solves the problem that mercury-containing wastewater needs to be added with sodium hydrosulfide or sodium sulfide to settle down to remove mercury, but also simultaneously removes hydrogen sulfide gas in crude acetylene gas, improves the purity of acetylene gas, and reduces the concentration of sodium hypochlorite. Consumption, to achieve a double harvest of environmental benefits and economic benefits. The invention also discloses a method for improving the purity of acetylene gas while using the device to remove mercury from mercury-containing wastewater.

Description

technical field [0001] The invention relates to a device and a method for improving the purity of acetylene gas while removing mercury from mercury-containing wastewater, and belongs to the technical field of environmental protection technology. Background technique [0002] In the production process of vinyl chloride, because the catalyst contains a large amount of mercury, part of the mercury enters the purification system with the crude vinyl chloride gas in a high temperature environment and is absorbed by the deacidification tower, water washing tower and alkali washing tower. Alkali mercury content can reach more than 20μg / mL. In order to avoid mercury pollution, after neutralization of part of the spent acid and spent alkali, sodium hydrosulfide or sodium sulfide is added for preliminary chemical reaction to remove mercury. But this mercury removal process not only needs to add sodium hydrosulfide or sodium sulfide, but also uses a large amount of electrical equipmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C07C7/00C07C7/148C07C11/24C02F101/20
CPCC02F1/5236C02F2101/20C07C7/005C07C7/14833C07C11/24
Inventor 何伟冯斌李强侯迎利肖文侯飞杨晓慧
Owner XINJIANG HUATAI HEAVY CHEM CO LTD
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