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Spray tower and method for processing VOCs by using spray tower

A spray tower and station treatment technology, which is applied in the field of volatile organic compound treatment, can solve the problems of complex equipment structure and high VOC treatment cost, and achieve the effect of simple operation, simple structure and reduced treatment cost

Inactive Publication Date: 2020-02-07
SHANGHAI JINGFENG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has complex equipment structure and high VOC treatment cost

Method used

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  • Spray tower and method for processing VOCs by using spray tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This embodiment provides a spray tower, the structure schematic diagram of the spray tower is as follows figure 1 shown.

[0055] The spray tower provided in this embodiment includes a tower body 1, a packing layer 2, a defogging layer 3, a grid plate 4, a spraying device 5, an air inlet 6 and an air outlet 7; the defogging layer 3 is located at the top of the tower, For removing the liquid mixed in the gas, the packing layer 2 is located in the tower body 1 below the demister layer 3; both the packing layer 2 and the demister layer 3 are supported by the grid plate 4, and the packing layer 2 A spraying device 5 is provided above for spraying the filler in the packing layer 2; the air inlet 6 is located on the tower body 1 and below the packing layer 2, and the air outlet 7 is located on the top of the demister layer 3.

[0056] In the spray tower provided in this embodiment, the spray device 5 is connected to the circulating water pump through the circulating water pi...

Embodiment 2

[0065] In this embodiment, the same spray tower as in Embodiment 1 is used for VOCs treatment.

[0066] This embodiment provides a method of using the spray tower provided by this embodiment to treat VOCs, the specific method is:

[0067] The gas containing VOCs (the mixed recovery tail gas of ethanol and acetaldehyde) is passed into the spray tower from the air inlet 6 and moves upward in the spray tower, while spraying sodium hydroxide to the packed layer 2 with the spray device 5 Aqueous solution (2wt%), the gas permeates through the filler layer 2, and the sodium hydroxide aqueous solution absorbs VOCs and discharges it to the sewage station for treatment, and the gas after removing VOCs passes through the demisting layer 3 to remove entrained water from the air outlet 7 discharge.

[0068] During the absorption process, the operating temperature of the spray tower is controlled to be 15° C. and the operating pressure is 0.15 MPa by controlling the flow of spray water and...

Embodiment 3

[0071] In this embodiment, the same spray tower as in Embodiment 1 is used for VOCs treatment.

[0072] This embodiment provides a method of using the spray tower provided by this embodiment to treat VOCs, the specific method is:

[0073] The gas containing VOCs (the mixed recovery tail gas of ethanol and acetaldehyde) is passed into the spray tower from the air inlet 6 and moves upward in the spray tower, while spraying water to the packing layer 2 with the spray device 5, the The gas permeates through the packing layer 2, and the water absorbs VOCs and is discharged to the sewage station for treatment. The gas after VOCs is removed passes through the demister layer 3 to remove entrained water and is discharged from the air outlet 7.

[0074] During the absorption process, the operating temperature of the spray tower is controlled to be 35° C. and the operating pressure is 0.25 MPa by controlling the flow rate of spray water and the flow rate of gas containing VOCs.

[0075]...

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PUM

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Abstract

The invention provides a spray tower and a method for processing VOCs by using the spray tower. The spray tower comprises a tower body, a packing layer, a defogging layer, a grating plate, a spray device, an air inlet and an air outlet, the defogging layer is located at the top of the tower, the packing layer is located in the tower body located below the defogging layer, the packing layer and thedefogging layer are correspondingly supported by the grating plate, the upper part of the packing layer is provided with the spray device, the air inlet is located in the tower body and below the packing layer, and the air outlet is located in the top of the defogging layer. The method comprises the steps that gas containing the VOCs is introduced into the spray tower through the air inlet, meanwhile an absorbent solution is sprayed to the packing layer by using the spray device, the gas penetrates through the packing layer, the absorption solution absorbs the VOCs and then is discharged, andafter removing the VOCs, the gas is discharged from the air outlet through the defogging layer. The provided method does not produce hazardous activated carbon waste, the cost is reduced, and the environment is protected.

Description

technical field [0001] The invention belongs to the technical field of volatile organic compound treatment, and relates to a spray tower and a method for treating VOCs using the spray tower. Background technique [0002] According to the definition of the World Health Organization (WHO), volatile organic compounds (Volatile Organic Compounds, VOCs) are various organic compounds with a boiling point of 50°C to 260°C at room temperature. In my country, VOCs refer to organic compounds with a saturated vapor pressure greater than 70Pa at room temperature and a boiling point below 260°C at normal pressure, or all organic compounds with a vapor pressure greater than or equal to 10Pa at 20°C and are volatile. [0003] In my country, VOCs refer to organic compounds with a saturated vapor pressure greater than 70Pa at room temperature and a boiling point below 260°C at normal pressure, or all organic compounds with a vapor pressure greater than or equal to 10Pa at 20°C and are volati...

Claims

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Application Information

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IPC IPC(8): B01D53/18B01D53/14
CPCB01D53/1406B01D53/1487B01D53/185B01D2257/704B01D2257/708Y02A50/20
Inventor 张永杨继坤郑梅杨永超
Owner SHANGHAI JINGFENG PHARMA