CN102302914B - 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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- CN102302914B CN102302914B CN2011101564065A CN201110156406A CN102302914B CN 102302914 B CN102302914 B CN 102302914B CN 2011101564065 A CN2011101564065 A CN 2011101564065A CN 201110156406 A CN201110156406 A CN 201110156406A CN 102302914 B CN102302914 B CN 102302914B
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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 acetic acid heat scission reaction, more relate to the mixing arrangement of acetic acid and catalyst in the acetic acid heat scission reaction.
Background technology
Take acetic acid as raw material, with phosphoric acid or phosphate or other phosphatic aqueous solution, it is catalyst, in pyrolysis furnace, under the pyroreaction condition, carrying out catalytic pyrolysis is at present domestic and international preparing ethylene ketone, ketene dimer, aceticanhydride and the topmost production method of ketenes derived product.In this method production process, can acetic acid gas and catalyst mix effectively equably is to determine acetic acid conversion ratio and crux factor optionally.In current production process, often the charging aperture at pyrolysis furnace directly arranges feed pipe, the feed pipe of acetic acid feed pipe and catalyst is set on feed pipe, and be connected with acetic acid steam and catalyst liquid in the two-way pipe, the gas-liquid in the two-way pipe is entered in pyrolysis furnace and is reacted by feed pipe after converging mixing.Acetic acid recited above and the mixing arrangement of catalyst easily cause catalyst liquid and acetic acid steam time of contact short and mix inhomogeneous, occur that 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 acetic acid 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 is to provide a kind of mixing arrangement that can make acetic acid and catalyst in acetic acid and the uniform acetic acid heat scission reaction of catalyst mix.
For addressing the above problem, the technical solution used in the present invention is: the mixing arrangement of acetic acid and catalyst in the acetic acid heat scission reaction, comprise mix cylinder, the top of described mix cylinder is provided with the acetic acid feed pipe, the bottom of described acetic acid feed pipe is stretched in mix cylinder, be positioned on the outer acetic acid feed pipe of mix cylinder and be provided with opening, be connected with the catalyst charge pipe on described opening, the bottom of acetic acid feed pipe is provided with jet blower, in the mix cylinder of jet blower below, is provided with packing layer; 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 acetic acid and catalyst mix even, effectively improves the conversion ratio of acetic acid with selective, reduces production costs.
The accompanying drawing explanation
Fig. 1 is the structural representation of the mixing arrangement of acetic acid and catalyst in acetic acid heat scission reaction of the present invention,
In 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 described in further detail.
As shown in Figure 1, the mixing arrangement of acetic acid and catalyst in the acetic acid heat scission reaction, it 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 mix cylinder 1, is positioned on the outer acetic acid feed pipe 2 of mix cylinder 1 and is provided with opening 3, on described opening 3, is connected with catalyst charge pipe 4, the bottom of acetic acid feed pipe 2 is provided with jet blower 5, in the mix cylinder 1 of jet blower 5 belows, is provided with packing layer 6; 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, without taking cleaning apart.Described filler is the high temperature resistant type material.
The acetic acid steam that will be 420 ℃ via the temperature of acetic acid vaporizer and acetic acid preheater in production joins in the acetic acid feed pipe 2 on mix cylinder 1, now adopting centrifugal pump to take the 18L/H flow with the pressure of 0.5Mpa is added to mass concentration in catalyst charge pipe 4 as 15% Diammonium phosphate (DAP) stabilized aqueous solution, catalyst is 2 meter per seconds at the mouth of pipe flow velocity of catalyst charge pipe 4, generally can be by catalyst at the mouth of pipe flow control of catalyst charge pipe 4 at the 1-3 meter per second; Acetic acid steam is 15 meter per seconds with the flow velocity at jet blower 5 places after the Diammonium phosphate (DAP) solution sprayed into mixes, generally can be by acetic acid steam and catalyst at the flow control at jet blower 5 places 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 enters in pyrolysis furnace and carries out cracking reaction and generate ketenes and water etc. by discharge nozzle 7, and reacting gas enters cooling section to be separated and purifies.Obtain following data in pyrolysis furnace outlet sample analysis: conversion ratio is 90.5%, is selectively 96.2%.The data of using duct type to add catalyst to obtain under the same terms are: the catalyst addition is 20L/H, and conversion ratio is 89.8%, is selectively 95.1%.
In acetic acid heat scission reaction of the present invention, the mixing arrangement of acetic acid and catalyst, simple in structure, makes acetic acid and catalyst mix abundant, effectively improves the conversion ratio of acetic acid with selective, reduced the loss of catalyst, reduces production costs.
Claims (2)
1. the mixed method of acetic acid and catalyst in the acetic acid heat scission reaction, it is characterized in that: adopt mixing arrangement, its structure comprises mix cylinder, the top of described mix cylinder is provided with the acetic acid feed pipe, the bottom of described acetic acid feed pipe is stretched in mix cylinder, be positioned on the outer acetic acid feed pipe of mix cylinder and be provided with opening, be connected with the catalyst charge pipe on described opening, the bottom of acetic acid feed pipe is provided with jet blower, be provided with packing layer in the mix cylinder of jet blower below, the bottom of described mix cylinder is provided with discharge nozzle; The acetic acid steam that will be 420 ℃ via the temperature of acetic acid vaporizer and acetic acid preheater in production joins in the acetic acid feed pipe on mix cylinder, adopt the Diammonium phosphate (DAP) stabilized aqueous solution that centrifugal pump is 15% with the pressure of 0.5MPa and the flow of 18L/h of take by mass concentration to be added in the catalyst charge pipe simultaneously, the catalyst Diammonium phosphate (DAP) aqueous solution is 1～3 meter per second at the mouth of pipe flow velocity of catalyst charge pipe, and acetic acid steam is 10～20 meter per seconds with the flow velocity at the jet blower place after the Diammonium phosphate (DAP) solution sprayed into mixes; The mist of ejection and the drop of not vaporizing fully enter into packing layer, the heat that the Diammonium phosphate (DAP) aqueous solution of vaporization is not accumulated in packing layer dry load layer is further vaporized and mixes with acetic acid steam, abundant mixed gas enters in pyrolysis furnace and carries out cracking reaction and generate ketenes and water by discharge nozzle, and reacting gas enters cooling section to be separated and purifies.
2. according to the mixed method of acetic acid and catalyst in the described acetic acid heat scission reaction of 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 |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101564065A 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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| CN102302914A CN102302914A (en) | 2012-01-04 |
| CN102302914B true CN102302914B (en) | 2013-12-04 |
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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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN115253759B (en) * | 2022-07-15 | 2023-07-21 | 江苏准信化学工程有限公司 | Mixed feeding device of waste 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 |
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- 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 |
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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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