Subassembly between gas-liquid contacting and in use for knockout tower for mass transfer

A gas-liquid contact and assembly technology, which is applied in the field of mass transfer separation tower technology, can solve the problems of increasing mist entrainment, energy loss, and performance reduction of mass transfer separation tower, so as to increase the gas channel area and improve the liquid lift. The effect of reducing flow resistance

Inactive Publication Date: 2005-08-31
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But they all have the same defect: their shapes, especially the square or rectangular spray hoods, cannot be effectively utilized between their end plates, and their arrangement on the separation tray determines that they inevitably exist in different degrees. The mist entrainment, gas-liquid back-mixing phenomenon, the efficiency of the mass transfer separation tower is not high, so it is difficult to greatly improve the separation effect and its processing capacity of the separation tower, and affect the processing capacity of the gas-liquid contact assembly
In addition, as far as the spray-type mass transfer separation tower is concerned, they all have another defect: that is, the spray holes of the spray plates of two adjacent gas-liquid contact devices in the mass transfer separation tower produce a "contraspray phenomenon" during work, resulting in Loss of energy consumption increases mist entrainment and affects transfer efficiency
If in order to avoid this "contraspray", it is necessary to increase the distance between two adjacent gas-liquid contact devices in each row and column, it is necessary to reduce the number of gas-liquid contact devices installed on the tray, that is, to reduce the key The number of working components means that the efficiency of the mass transfer separation column is reduced
In addition, the existence of the "contraspray phenomenon" also affects the number or opening ratio of the spray holes on the spray plate or spray cover, which in turn affects the efficiency of transfer and exchange.
On the other hand, there is a "no spray phenomenon" between the end plates (generally without injection holes) of two adjacent gas-liquid contact devices in the mass transfer separation tower, which also makes the working efficiency of the gas-liquid contact device not high. , which in turn affects the performance and efficiency of the mass transfer separation tower

Method used

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  • Subassembly between gas-liquid contacting and in use for knockout tower for mass transfer
  • Subassembly between gas-liquid contacting and in use for knockout tower for mass transfer
  • Subassembly between gas-liquid contacting and in use for knockout tower for mass transfer

Examples

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Embodiment 1

[0035] Vinyl chloride monomer low-boiling rectification tower (the original tower diameter is Φ600mm), adopts F1 type float valve tray, the number of trays is 38, the tray is single overflow type, the cross section of the downcomer is bow-shaped, and the overflow weir The length is 456mm, and the board spacing is 300mm. Its production capacity is 30,000 tons of PVC / year, and the product contains C 2 h 2 Amount ≤ 10 ~ 20ppm. The low-boiling tower was transformed with a vertical sieve tray tower (only the trays were replaced, and other factors such as tower diameter, number of trays, and plate spacing remained unchanged), and the production capacity was increased to 55,000 tons of PVC / year. Contains C 2 h 2 The amount drops to 0 (it cannot be detected by the instrument, the same below), and the plate resistance drops to about 60% of the original. Another low-boiling tower of the same type that has been transformed with a vertical sieve plate using the gas-liquid contact ass...

Embodiment 2

[0037] A PVC monomer high boiling rectification tower with a diameter of Φ1400. F1 type float valve trays are adopted, the number of trays is 40, of which 24 are in the rectification section, 16 are in the stripping section, and the spacing between the trays is 300mm and 350mm respectively. Pipe, the original design production capacity is 75,000 TPVC / year monomer. It is required that the finished monomer contains high boilers (dichloroethylene, etc.) ≤ 80-100ppm. Operational runs have shown that the above requirements cannot be met. The vertical sieve plate column technology is used to redesign, the diameter of the new column is φ1000, and the number of trays is the same as that of the float valve column. After being put into production, it shows that the production capacity can reach 90,000 TPVC / year monomers. And the content of high boilers in the finished monomer is reduced to 5-8ppm. It shows that the processing capacity is greatly increased (if converted with the same...

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Abstract

A gas-liquid contact unit for the mass-transfer separation tower in order to increase the efficiency of tower plate is composed of a cylindrical or truncated conic spray hood with uniformly distributed spray holes, a circular top plate with uniformly distributed guide holes and installed to top edge of said spray hood with a window between them, and 3-4 supporting legs for installing it at the flow-up air hole on tower plate.

Description

technical field [0001] The invention relates to a manufacturing technology of a gas-liquid continuous contact mass transfer separation tower, specifically a gas-liquid continuous contact mass transfer system commonly used in the processes of mass transfer, heat transfer, and humidification in the fields of petroleum, chemical industry, pharmacy, and environmental protection. The gas-liquid contact assembly in the separation tower and the mass transfer separation tower technology using it, the international patent classification number is proposed to be Int.Cl7.B01J19 / 00. Background technique [0002] At present, plate mass transfer separation towers (hereinafter referred to as plate towers) are widely used in the processes of mass transfer (such as rectification, absorption, desorption, and gas stripping operations), heat transfer, and humidification in the fields of petroleum, chemical industry, pharmaceuticals, and environmental protection. . There are many types of plate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/20B01J19/00
Inventor 杜佩衡董艳河杜剑婷黄敬
Owner HEBEI UNIV OF TECH
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