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Formaldehyde absorption tower

A formaldehyde absorption tower and absorption tower technology, applied in separation methods, organic chemistry, dispersed particle separation, etc., can solve problems such as formaldehyde polymerization, achieve large processing capacity, increase gas-liquid contact area, and high separation efficiency

Inactive Publication Date: 2012-01-25
江阴市华燕石化机械装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect in the prior art, design a kind of formaldehyde absorption tower, this absorption tower can produce the formaldehyde of high concentration, and has higher absorption efficiency, simultaneously this absorption tower can solve the problem in the production of high concentration formaldehyde solution The problem of formaldehyde polymerization during the

Method used

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Effect test

Embodiment 1

[0026] A formaldehyde absorption tower, the absorption tower includes a tower still 1, a first packing layer 2 and a second packing layer 3 are arranged in the tower still 1, on the tower still wall below the first packing layer 2 A first air inlet 4 and several nozzle installation ports 5 are provided, and a nozzle 6 is installed through a pipeline on the nozzle installation port 5, and the nozzle 6 is installed inside the tower kettle 1 with the nozzle upward; The first liquid inlet pipe 7 and the first liquid outlet 8 are arranged on the tower still wall between the first packing layer 2 and the second packing layer 3, and the first liquid inlet pipe 7 and the first liquid outlet 8 A partition 9 is arranged between them, and a gas phase pipe 10 for the gas under the partition 9 to flow upward is arranged on the partition 9, and a gas phase pipe 10 for the liquid on the partition 9 to overflow to the partition The overflow pipe 11 to the lower layer of the plate; the second ...

Embodiment 2

[0028] On the basis of Embodiment 1, a preferred embodiment of the present invention is to install the first packing layer 2 and the second packing layer 3 on a support plate 18 that combines a beam type and a gas injection type.

Embodiment 3

[0030] On the basis of Example 2, the preferred embodiment of the present invention also includes that the first packing layer 2 is a high-concentration formaldehyde-absorbing packing layer, and the high-concentration formaldehyde-absorbing packing layer selects Φ50 Pall rings, and the The second packing layer 3 is a second-high concentration formaldehyde-absorbing packing layer, and the second-high concentration formaldehyde-absorbing packing layer is selected from Φ25 Pall rings.

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Abstract

The invention discloses a formaldehyde absorption tower. The absorption tower comprises a tower kettle, wherein the lower part of the tower kettle is provided with a mixed gas inlet and a finished product formaldehyde outlet, the upper part of the tower kettle is provided with a water inlet and a exhaust gas outlet, two layers of packing are arranged in the tower kettle, and formaldehyde solutioncirculating pipes are arranged between packing layers. During the displacement process that mixed gas moves from bottom to top and water flows from top to bottom, formaldehyde in the mixed gas is dissolved in water to form formaldehyde solution, wherein the formaldehyde solution is circulated between two layers of packing so as to gradually increase the concentration of formaldehyde. A sprinkler used for wetting the inner wall of the tower kettle is arranged below the packing layers so as to prevent the wall-cling phenomenon of the formaldehyde absorption solution. The formaldehyde absorptiontower can be used to prepare high concentration formaldehyde and has higher absorption efficiency; in addition, the absorption tower can solve the problem of formaldehyde polymerization in the production process of high concentration formaldehyde.

Description

technical field [0001] The invention relates to chemical equipment, in particular to a formaldehyde absorption tower. Background technique [0002] The production of formaldehyde for industrial use is generally a gas mixture containing formaldehyde gas, nitrogen, hydrogen, carbon dioxide, carbon monoxide, water vapor and unreacted methanol generated from an oxidizer, which can be formed by absorbing formaldehyde in the mixture with water For formaldehyde aqueous products, this absorption process is completed through formaldehyde absorption towers and cooling equipment. In the formaldehyde absorption tower, the gas moves from bottom to top, while the absorption liquid flows from top to bottom, and the two contact in countercurrent. During this process, due to mass transfer, the formaldehyde in the mixed gas dissolves into the absorption liquid, and the solubility of formaldehyde in water is related to the temperature, pressure (partial pressure of formaldehyde in the gas pha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/18C07C47/058
Inventor 华秋发
Owner 江阴市华燕石化机械装备有限公司
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