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Reactor with multiple ring canal

A loop reactor and loop tube technology, applied in chemical/physical/physical chemical fixed reactors, chemical instruments and methods, chemical/physical/physical chemical processes, etc., can solve the problem of difficult large-scale devices and complex structures, etc. problems, to achieve the effect of easy large-scale, high degree of plug flow, and low manufacturing cost

Inactive Publication Date: 2003-10-01
刘兆彦
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the twin-screw can meet the requirements of heat transfer and mixing, the structure is complex and it is difficult to enlarge the device

Method used

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  • Reactor with multiple ring canal
  • Reactor with multiple ring canal
  • Reactor with multiple ring canal

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Multilayer loop reactor of the present invention is used as nylon 6 anionic polymerization reactor:

[0028] The reactor has a double-circle structure, the diameter of the outer ring is 2m, and the diameter of the inner ring is 1.9m. There are 80 layers in total, with 20 holes in each layer. The floor height is 50mm; the inner diameter of the ring pipe on the 41st to 60th floor is 35mm; the inner diameter of the ring pipe on the 61st to 80th floor is 40mm; the inner diameter of the upper main pipe is 70mm, and the inner diameter of the lower main pipe is 125mm. The diameter of the heat exchange outer cylinder is 2.15m, and the diameter of the heat exchange indoor cylinder is 1.75m.

[0029] Containing 0.1% (weight) NaOH and 0.1% (weight) toluene diisocyanate caprolactam enters the reactor from the upper main pipe, the temperature is 200°C, and the flow rate is 4500Kg / hour. The heat transfer oil enters the heat exchange chamber from the lower part, with a temperature of...

Embodiment 2

[0031] The multilayer loop reactor of the present invention is used as a polyethylene terephthalate (PET) cooler:

[0032] The reactor has a double-ring structure, with an outer ring diameter of 808 mm and an inner ring diameter of 700 mm, with a total of 40 layers; the inner diameter of each ring pipe is 40 mm, the number of short pipes is 16, and the inner diameter of the upper and lower main pipes is 150 mm. The diameter of the heat exchange outer cylinder is 950mm, and the diameter of the inner cylinder is 550mm.

[0033] The temperature of the PET melt to be cooled is 293°C and enters the cooler from the upper header with a flow rate of 6000Kg / hour. The heat transfer oil enters the heat exchange chamber from the bottom with a flow rate of 30,000-45,000Kg / hour and a temperature of 263-268°C. It leaves the cooler from the top at a temperature of 265-270°C. The PET melt leaves the cooler from the lower main pipe and the temperature drops to 282°C.

[0034] Compared with the...

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Abstract

A multi-layer ring tube reactor is composed of m-layers of ring tubes, where m=2-hundreds, and heat exchanging chamber which has cylinder or dual-cylinder structure for containing said ring tubes, upper and lower sealing covers, and inlet and outlet of heat or cold medium. Said ring tube has top and bottom holes. The relative top holes of lower ring tube are communicated to the bottom holes of upper ring tube. Its advantages are simple structure, low cost, and high heat exchange efficiency.

Description

technical field [0001] The invention relates to a multilayer loop reactor. Background technique [0002] The pipe reactor has a simple structure, low maintenance, and the material is close to plug flow, so it has been widely used in chemical production. But in some occasions, the chemical reaction speed is very fast, the reaction time is very short, the volume of the reactor is small, and the reaction heat that needs to be added or taken out in time is quite large, which is difficult for ordinary pipeline reactors. In other occasions, the materials must be fully mixed during the reaction process, but static mixing components with excessive pressure loss are not allowed to be installed, and general pipeline reactors are also difficult to do. In these occasions, people usually choose twin-screw reactors. Although the twin-screw can meet the requirements of heat transfer and mixing, its structure is complicated and it is difficult to enlarge the device. At the same time, the...

Claims

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Application Information

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IPC IPC(8): B01J19/00B01J19/24
Inventor 刘兆彦施景云
Owner 刘兆彦
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