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Catalyst tremie pipe

A catalyst and feeding tube technology, applied in the field of reactors, can solve the problems of fan-shaped cylinder or central tube being squeezed and deformed by the catalyst, the flow pattern of catalyst particles deviating from the plug flow, and the low utilization rate of the effective volume of the reactor, etc., to achieve a large Practical value and economic significance, increase effective volume utilization, and low difficulty in manufacturing and installation

Inactive Publication Date: 2013-09-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problems to be solved by the present invention are: the dead zone of the solid catalyst particles in the reactor caused by the use of the existing catalyst feeding pipe is large, the effective volume utilization rate of the reactor is low, the flow pattern of the catalyst particles seriously deviates from the plug flow and During the operation of the device, the catalyst in the dead zone will cause runaway temperature due to severe coking, and even cause the fan-shaped tube or central tube in the reactor to be squeezed and deformed by the catalyst

Method used

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Examples

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Effect test

Embodiment 1

[0031] like figure 1 and figure 2 As shown, the catalyst feeding pipe of the present invention includes a guide tube 9 and two side ports which are respectively communicated with the same tube mouth of the guide tube 9 and are symmetrically arranged. Both ends of the guide tube 9 are not closed.

[0032] The cross section of the guide tube 9 is circular. The catalyst feeding pipe is symmetrical along the central axis of the guide tube 9 .

[0033] The port area of ​​the side interface gradually increases from the connection with the guide tube 9, and can be specifically set as: the side interface includes an isosceles trapezoid-shaped top plate 7, an isosceles trapezoid-shaped bottom plate 8, and a connection connecting the top plate 7 and the bottom plate 8. Two right-angled trapezoidal side plates 10; the upper bottom edge of the top plate 7, the upper bottom edge of the bottom plate 8 and the inclined waist of the two side plates 10 are connected with the cylinder mout...

Embodiment 2

[0039] like Image 6 As shown, the present invention adopts the continuous catalytic reforming radial reactor of the Y-type catalyst feeding pipe in Example 1, and the reactor is composed of an upper head 11, a cylindrical reactor body 12 and a bottom head 13. the outer casing of the device. A gas inlet pipe 14 and a gas outlet pipe 15 are arranged on the outer shell of the reactor, wherein the gas inlet pipe 14 is arranged on the upper head 11 . The central axis of the reactor barrel 12 is provided with a central pipe 16 coaxial with the reactor barrel 12 , and the gas outlet pipe 15 communicates with the central pipe 16 . The inner wall of the reactor barrel 12 is evenly provided with a plurality of fan-shaped cylinders 17, and 8 Y in the embodiment 1 uniformly distributed along the circumference of the central pipe 16 are evenly arranged along the inner circumferential direction of the annular gap between the fan-shaped cylinder 17 and the central pipe 16. Type catalyst f...

Embodiment 3

[0047] The present invention adopts the moving bed methanol-to-olefin radial reactor of the Y-type catalyst feed pipe in Example 1, except that the continuous catalytic reforming radial reactor used in Example 2 is replaced with a moving-bed methanol-to-olefin radial reactor Reactor, other structures are the same as Example 2.

[0048] The structure of the above-mentioned moving bed methanol-to-olefin radial reactor and its components, except that the catalyst feeding pipe 26 adopts the Y-type catalyst feeding pipe in Example 1, the other parts are conventional parts, and the catalyst feeding pipe 26 is The arrangement, the operating process of the reactor and the operating conditions are also conventional, so only the above brief description is given.

[0049] The catalyst feeding tubes 26 in Example 1 were used, wherein the number of catalyst feeding tubes 26 was 20, and the plate thicknesses were all 0.5 mm. The ratio of the length of the rectangular receiving port, the di...

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Abstract

The invention discloses a catalyst tremie pipe which comprises a guide shell and two side ports, wherein the two side ports are respectively communicated with the same port of the guide shell and arranged symmetrically. The catalyst tremie pipe disclosed by the invention can reduce the influence of the wall attachment effect on the reactor wall surface, can obviously reduce the catalyst flow dead zone in the reactor, enhances the effective volume utilization ratio of the reactor, enables the catalyst stream type to be more approximate to the piston flow, and is especially suitable for a moving bed radial reactor for preparation of olefine from methanol, catalytic reforming or any other production process.

Description

technical field [0001] The invention relates to the field of reactors, in particular to a catalyst feed pipe, which can be used in a moving bed radial reactor, especially a moving bed radial reactor used in a process of methanol to olefin or catalytic reforming. Background technique [0002] Moving bed reactors are widely used in chemical industry, especially in naphtha catalytic reforming, toluene disproportionation, coal gasification and other processes. . Advances in Chemical Engineering, 1994, 3: 40-45). The main features of the moving bed technology are: the reaction gas is continuously contacted with the solid catalyst in a manner similar to plug flow, and the catalyst can be continuously moved in and out of the reactor, but the circulation rate of the catalyst is much lower than that of the fluidized bed reaction. device. Therefore, the moving bed reactor is a type of reactor whose operating performance is between the fixed bed and the fluidized bed, and is suitable...

Claims

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Application Information

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IPC IPC(8): B01J8/12
Inventor 阳永荣唐玥祺蒋云涛王靖岱蒋斌波黄正梁姜坤
Owner ZHEJIANG UNIV
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