CN102302914A - Device for mixing acetic acid with catalyst in acetic acid pyrolytic cracking reaction - Google Patents
Device for mixing acetic acid with catalyst in acetic acid pyrolytic cracking reaction Download PDFInfo
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- CN102302914A CN102302914A CN201110156406A CN201110156406A CN102302914A CN 102302914 A CN102302914 A CN 102302914A CN 201110156406 A CN201110156406 A CN 201110156406A CN 201110156406 A CN201110156406 A CN 201110156406A CN 102302914 A CN102302914 A CN 102302914A
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- acetic acid
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Abstract
The invention discloses a device for mixing acetic acid with a catalyst in an acetic acid pyrolytic cracking reaction, which is characterized in that: the device comprises a mixing cylinder body; the top of the mixing cylinder body is provided with an acetic acid charge pipe; the bottom end of the acetic acid charge pipe extends into the mixing cylinder body; an opening is arranged on the acetic acid charge pipe located outside the mixing cylinder body; a catalyst charge pipe is connected onto the opening; the bottom end of the acetic acid charge pipe is provided with a jet nozzle; a packing layer is arranged in the mixing cylinder body below the jet nozzle; and the bottom of the mixing cylinder body is provided with a discharge pipe. The device for mixing the acetic acid with the catalyst in the acetic acid pyrolytic cracking reaction disclosed by the invention has the advantages of simple structure, capability of enabling the acetic acid to be sufficiently mixed with the catalyst, effectively enhancing the conversion rate and the selectivity of the acetic acid, reducing the loss of the catalyst and lowering the production cost.
Description
Technical field
The present invention relates to the acetate heat scission reaction, more relate to the mixing arrangement of acetate and catalyst in the acetate heat scission reaction.
Background technology
With acetate is raw material; Use phosphoric acid or phosphate or other phosphatic aqueous solution to be catalyst; In pyrolysis furnace, under the pyroreaction condition, carrying out catalytic pyrolysis is to produce ketenes, ketene dimer, aceticanhydride and the topmost production method of ketenes derived product at present both at home and abroad.In this method production process, can acetate gas and catalyst mix effectively equably is decision acetate conversion ratio and crux factor optionally.In the present production process; Often the charging aperture at pyrolysis furnace directly is provided with feed pipe; The feed pipe of acetic acid feed pipe and catalyst is set on the feed pipe; And in the two-way pipe, be connected with acetic acid steam and catalyst liquid, the gas-liquid in the two-way pipe is converged and is mixed the back by reacting in the feed pipe entering pyrolysis furnace.Acetate recited above and the mixing arrangement of catalyst cause catalyst liquid and acetic acid steam time of contact short and mix inhomogeneous easily; The appearance part does not have catalyst or catalyst is on the low side and the situation of local catalyst excess; Thereby cause the conversion ratio of acetate not high, and the local excessive catalyst heat that can absorb pyrolysis furnace cause the waste of fuel.
Summary of the invention
Technical problem to be solved by this invention provides a kind of mixing arrangement that can make acetate and catalyst in acetate and the uniform acetate heat scission reaction of catalyst mix.
For addressing the above problem; The technical scheme that the present invention adopts is: the mixing arrangement of acetate and catalyst in the acetate heat scission reaction; Comprise mix cylinder, the top of described mix cylinder is provided with the acetic acid feed pipe, and the bottom of described acetic acid feed pipe is stretched in the mix cylinder; Be positioned at the outer acetic acid feed pipe of mix cylinder and be provided with opening; Be connected with the catalyst charge pipe on the described opening, the bottom of acetic acid feed pipe is provided with jet blower, is provided with packing layer in the mix cylinder of jet blower below; The bottom of described mix cylinder is provided with discharge nozzle.
The top of described mix cylinder also is provided with washer jet.
Beneficial effect of the present invention: mixing arrangement of the present invention is simple in structure, can make acetate and catalyst mix even, effectively improves the conversion ratio and the selectivity of acetate, reduces production costs.
Description of drawings
Fig. 1 is the structural representation of the mixing arrangement of acetate and catalyst in the acetate heat scission reaction of the present invention,
Among the figure: 1, mix cylinder, 2, the acetic acid feed pipe, 3, opening, 4, the catalyst charge pipe, 5, jet blower, 6, packing layer, 7, discharge nozzle, 8, washer jet.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed description.
As shown in Figure 1, the mixing arrangement of acetate and catalyst in the acetate heat scission reaction is characterized in that: comprise mix cylinder 1; The top of described mix cylinder 1 is provided with acetic acid feed pipe 2; The bottom of described acetic acid feed pipe 2 is stretched in the mix cylinder 1, is positioned at mix cylinder 1 outer acetic acid feed pipe 2 and is provided with opening 3, is connected with catalyst charge pipe 4 on the described opening 3; The bottom of acetic acid feed pipe 2 is provided with jet blower 5, is provided with packing layer 6 in the mix cylinder 1 of jet blower 5 belows; The bottom of described mix cylinder 1 is provided with discharge nozzle 7, and described discharge nozzle 7 is connected with pyrolysis furnace.The top of described mix cylinder 1 also is provided with washer jet 8; The quantity of washer jet 8 can be a plurality of; Angle and position arbitrarily in the mix cylinder 1 that can clean like this; Regularly open washer jet 8, remove dust stratification or acid dirt that mix cylinder 1 inner stuffing layer 6 produces, need not to take apart cleaning.Described filler is the high temperature resistant type material.
The acetic acid steam that in the production will be 420 ℃ via the temperature of acetate vaporizer and acetate preheater joins in the acetic acid feed pipe 2 on the mix cylinder 1; Adopt centrifugal pump this moment is that 15% Diammonium phosphate (DAP) stabilized aqueous solution be added to catalyst charge pipe 4 in the 18L/H flow with mass concentration with the pressure of 0.5Mpa; Catalyst is 2 meter per seconds at the mouth of pipe flow velocity of catalyst charge pipe 4, generally can catalyst be controlled at the 1-3 meter per second at the mouth of pipe flow velocity of catalyst charge pipe 4; Acetic acid steam is mixed the flow velocity of back at jet blower 5 places with the Diammonium phosphate (DAP) solution that sprays into be 15 meter per seconds, generally can acetic acid steam and the flow velocity of catalyst at jet blower 5 places be controlled at the 10-20 meter per second; The gas of the mixing of ejection and the drop of not vaporizing fully enter into packing layer 6; The Diammonium phosphate (DAP) aqueous solution of vaporization is not raiseeed the further vaporization of long-pending heat and is mixed with acetic acid steam in packing layer 6 dry load layers; Abundant mixed gas gets into through discharge nozzle 7 and carries out cracking reaction in the pyrolysis furnaces and generate ketenes with water etc., and reacting gas entering cooling section separates and purifies.Obtain following data in pyrolysis furnace outlet sample analysis: conversion ratio is 90.5%, and selectivity is 96.2%.The data that the same terms uses duct type adding catalyst to obtain down are: the catalyst addition is 20L/H, and conversion ratio is 89.8%, and selectivity is 95.1%.
The mixing arrangement of acetate and catalyst is simple in structure in the acetate heat scission reaction of the present invention, makes acetate and catalyst mix abundant, effectively improves the conversion ratio and the selectivity of acetate, has reduced the loss of catalyst, reduces production costs.
Claims (2)
1. the mixing arrangement of acetate and catalyst in the acetate heat scission reaction; It is characterized in that: comprise mix cylinder, the top of described mix cylinder is provided with the acetic acid feed pipe, and the bottom of described acetic acid feed pipe is stretched in the mix cylinder; Be positioned at the outer acetic acid feed pipe of mix cylinder and be provided with opening; Be connected with the catalyst charge pipe on the described opening, the bottom of acetic acid feed pipe is provided with jet blower, is provided with packing layer in the mix cylinder of jet blower below; The bottom of described mix cylinder is provided with discharge nozzle.
2. the mixing arrangement of acetate and catalyst in the acetate heat scission reaction according to claim 1, it is characterized in that: the top of described mix cylinder also is provided with washer jet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101564065A CN102302914B (en) | 2011-06-13 | 2011-06-13 | Device for mixing acetic acid with catalyst in acetic acid pyrolytic cracking reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101564065A CN102302914B (en) | 2011-06-13 | 2011-06-13 | Device for mixing acetic acid with catalyst in acetic acid pyrolytic cracking reaction |
Publications (2)
| Publication Number | Publication Date |
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| CN102302914A true CN102302914A (en) | 2012-01-04 |
| CN102302914B CN102302914B (en) | 2013-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101564065A Active CN102302914B (en) | 2011-06-13 | 2011-06-13 | Device for mixing acetic acid with catalyst in acetic acid pyrolytic cracking reaction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865352A (en) * | 2021-09-26 | 2021-12-31 | 江苏新久化工设备制造有限公司 | Mixed feeding structure of acetic acid cracking furnace |
| CN115253759A (en) * | 2022-07-15 | 2022-11-01 | 江苏准信化学工程有限公司 | Mixed feeding device of spent acid cracking furnace |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201431877Y (en) * | 2009-03-31 | 2010-03-31 | 淳安千岛湖龙祥化工有限公司 | Improved reaction kettle of feeding device |
| CN201744311U (en) * | 2010-07-28 | 2011-02-16 | 湖州新奥特医药化工有限公司 | Material mixer structure for preparing acetyl acetone |
| CN202161980U (en) * | 2011-06-13 | 2012-03-14 | 苏州浩波科技股份有限公司 | Mixing device of acetic acid and catalysts in acetic acid thermal cracking reaction |
-
2011
- 2011-06-13 CN CN2011101564065A patent/CN102302914B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201431877Y (en) * | 2009-03-31 | 2010-03-31 | 淳安千岛湖龙祥化工有限公司 | Improved reaction kettle of feeding device |
| CN201744311U (en) * | 2010-07-28 | 2011-02-16 | 湖州新奥特医药化工有限公司 | Material mixer structure for preparing acetyl acetone |
| CN202161980U (en) * | 2011-06-13 | 2012-03-14 | 苏州浩波科技股份有限公司 | Mixing device of acetic acid and catalysts in acetic acid thermal cracking reaction |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865352A (en) * | 2021-09-26 | 2021-12-31 | 江苏新久化工设备制造有限公司 | Mixed feeding structure of acetic acid cracking furnace |
| CN113865352B (en) * | 2021-09-26 | 2023-01-06 | 江苏新久化工设备制造有限公司 | Mixed feeding structure of acetic acid cracking furnace |
| CN115253759A (en) * | 2022-07-15 | 2022-11-01 | 江苏准信化学工程有限公司 | Mixed feeding device of spent acid cracking furnace |
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| Publication number | Publication date |
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| CN102302914B (en) | 2013-12-04 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Device for mixing acetic acid with catalyst in acetic acid pyrolytic cracking reaction Effective date of registration: 20150209 Granted publication date: 20131204 Pledgee: Bank of Communications Ltd. Zhangjiagang branch Pledgor: SUZHOU HOPE TECHNOLOGY CO.,LTD. Registration number: 2015990000121 |
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Date of cancellation: 20220822 Granted publication date: 20131204 Pledgee: Bank of Communications Ltd. Zhangjiagang branch Pledgor: SUZHOU HOPE TECHNOLOGY CO.,LTD. Registration number: 2015990000121 |
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Effective date of registration: 20221026 Address after: 226009 No. 968, Jiangshan Road, Nantong Economic and Technological Development Zone, Nantong City, Jiangsu Province Patentee after: NANTONG HONGXIN CHEMICAL Co.,Ltd. Address before: 215633 Suzhou Haobo Technology Co., Ltd., Nansha Sanjiali Road, Jingang Town, Zhangjiagang City, Suzhou, Jiangsu Province Patentee before: SUZHOU HOPE TECHNOLOGY CO.,LTD. |
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