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Acidic tail gas absorption tower in oxalic acid production and method for absorbing oxalic acid tail gas

An acid tail gas and absorption tower technology, which is applied in separation methods, chemical instruments and methods, gas treatment, etc., to reduce costs, generate economic benefits, and avoid environmental pollution.

Pending Publication Date: 2017-05-31
SHANDONG FENGYUAN CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides an acid tail gas absorption tower in the production of oxalic acid and a method for absorbing the tail gas of oxalic acid, so as to solve the problem of waste gas treatment and comprehensive utilization in the production of oxalic acid

Method used

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  • Acidic tail gas absorption tower in oxalic acid production and method for absorbing oxalic acid tail gas
  • Acidic tail gas absorption tower in oxalic acid production and method for absorbing oxalic acid tail gas

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Embodiment Construction

[0022] The structure of the present invention is shown in the figure, the acid tail gas absorption tower in the oxalic acid production, this device is arranged behind the oxalic acid dissolving tank, comprises the airtight tower body 1, and the inside of the tower body 1 is provided with multi-layer aeration plate 4, and the tower body 1 The lower part is provided with tail gas inlet 2, and the tail gas inlet 2 is connected to the preparation and dissolution tank of oxalic acid mother liquor.

[0023] The upper part of the tower body 1 is provided with an exhaust gas outlet 3, and the vent plate 4 is fixed inside the tower body 1, and the vent plate 4 is provided with a plurality of air holes 13 evenly distributed, and one side of the vent plate 4 is provided with an overflow hole 15, and the overflow The circle of flow hole 15 is higher than the upper side of ventilation plate 4. The upper part of the tower body 1 is also provided with an absorption liquid inlet 5, and the low...

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Abstract

The invention relates to an acidic tail gas absorption tower in oxalic acid production and a method for absorbing oxalic acid tail gas, and belongs to the field of environmental protection. According to the technical scheme, the acidic tail gas absorption tower in oxalic acid production comprises a sealed tower body, a plurality of layers of ventilating plates are arranged in the tower body, a tail gas inlet is formed in the lower portion of the tower body, a tail gas outlet is formed in the upper portion of the tower body, and the ventilating plates are fixed into the tower body. A plurality of air holes are evenly distributed in the ventilating plates, an overflow hole is formed in one side of each ventilating plate, one circle of the overflow holes is higher than the upper side faces of the ventilating plates, an absorption liquid inlet is formed in the upper portion of the tower body, an absorption liquid outlet is formed in the lower portion of the tower body, a heat exchange device is arranged at the bottom of the tower body, and the two ends of a circulating pipeline are connected into the top and the bottom of the tower body respectively.

Description

technical field [0001] The invention relates to an acid tail gas absorption tower in oxalic acid production and a method for absorbing oxalic acid tail gas, belonging to the field of environmental protection. Background technique [0002] Acid gas will be formed in the preparation of oxalic acid, which contains a large amount of nitrogen oxides, and its direct discharge will cause serious pollution to the environment. At present, water or lye absorption is usually used to remove the nitrogen oxide components in the tail gas, which is costly and consumes a lot of resources. Even if the pollutant components are removed from the tail gas, the by-products formed cannot be effectively utilized, and the secondary waste treatment will also increase the cost. [0003] Since a large amount of acidic solution is required in the preparation of oxalic acid, if the nitrogen oxides in the tail gas can be fully utilized to generate acidic liquid raw materials, it will bring better cost-...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/1456B01D53/1493B01D2257/40B01D2258/02
Inventor 赵光辉
Owner SHANDONG FENGYUAN CHEM CO LTD
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