Anti-scaling and dirty-proof block tower-plate

An anti-fouling and tray technology, applied in the direction of fractionation, etc., can solve the problems of short service life of composite layer or coating, and achieve the effects of reducing the possibility of fouling and clogging of trays, optimizing flow and long service life

Inactive Publication Date: 2006-08-16
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thirdly, graphite and polytetrafluoroethylene have sufficient mechanical strength and machinability, and part of the structure or the whole of the tray can be made of it, which overcomes the short life of the special material composite layer or coating

Method used

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  • Anti-scaling and dirty-proof block tower-plate
  • Anti-scaling and dirty-proof block tower-plate
  • Anti-scaling and dirty-proof block tower-plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Propylene oxide reactive distillation tower (saponification tower) in a chemical plant, the original diameter of the tower is 2400mm, and the number of trays is 9; single downcomer type, the shape of the downcomer 3 is bow-shaped, and the length of the overflow weir 4 is 1800mm; the traditional large hole is adopted The sieve plate has a hole diameter of 12mm; the material of tray 1 is domestic 304 stainless steel. In the actual production, the blockage of the tray will occur on average in about 10 days. In severe cases, it will be necessary to stop for 5-6 days. The staff will wear protective clothing and masks to clean the tower, which seriously affects the normal production. The environment is extremely harsh and labor-intensive. According to the cleaners, there is a thick layer of hard scale on the surface of the tray below the feed liquid, and the sieve holes are blocked, which is obviously caused by the precipitation and crystallization of a large amount of inorga...

Embodiment 2

[0032]Propylene oxide reactive distillation tower (saponification tower) in a chemical plant, the original diameter of the tower is 3200mm, and the number of trays is 12; single downcomer type, the shape of the downcomer is arc-shaped, and the length of the overflow weir is 3000mm; the traditional large hole is adopted The sieve plate has a hole diameter of 14mm; the material of the plate is 304 stainless steel. In the actual production, the clogging of the trays will occur on average about 30 days, which seriously restricts the production output. According to the maintenance worker, the blockage of the trays is mainly concentrated on the upper and lower trays of the feed liquid inlet. The two trays are different: the lower surface of the upper tray has extremely hard hanging stalactite scaling, and the lower There is a thick layer of hard scale on the upper surface of the tray, and most of the sieve holes on the upper and lower trays are blocked. Adopt the patent of the pres...

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PUM

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Abstract

An antiscaling, antidirt and antiblocking tower plate is composed of a flat plate made of graphite or teflon and with inclined guide holes for flushing the surface of plate, down-flow spout, and overflow dam with bottom slits for preventing solid collection. Its advantages are long service life, high resistance to high temp, corrosion and solvent, and high effect.

Description

technical field [0001] The patent of the present invention relates to the tray of a plate separation tower. Background technique [0002] In many industries such as petrochemical, chlor-alkali, chemical fertilizer, coal chemical industry, etc., it is often encountered that the material contains a large amount of solid particles (such as mud sand, carbon black, etc.) such as CaCl 2 , CaCO 3 , MgCO 3 etc.) cause the blockage of the tray or packing, so it has to be stopped frequently for cleaning and descaling, which seriously affects the normal production. For example, the saponification section in my country's propylene oxide plant is a reactive distillation tower, which generates propylene oxide and HCl from the reaction of chloropropanol and milk of lime, and Ca(OH) in milk of lime 2 , Mg(OH) 2 react with HCl and CO in the air 2 The reaction produces a large amount of CaCO 3 , CaCl 2 and a small amount of MgCl 2 , MgCO 3 The sieve holes or mass transfer elements o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D3/18
Inventor 耿皎张志炳张锋韩仁宇
Owner NANJING UNIV
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