CN102908848A - Quenching tower of fluidized bed methanol preparing propylene process and method for preventing catalyst from blocking pipe outlet - Google Patents
Quenching tower of fluidized bed methanol preparing propylene process and method for preventing catalyst from blocking pipe outlet Download PDFInfo
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- CN102908848A CN102908848A CN2012104307607A CN201210430760A CN102908848A CN 102908848 A CN102908848 A CN 102908848A CN 2012104307607 A CN2012104307607 A CN 2012104307607A CN 201210430760 A CN201210430760 A CN 201210430760A CN 102908848 A CN102908848 A CN 102908848A
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Abstract
The invention discloses a quenching tower of a fluidized bed methanol preparing propylene process, and further discloses a method for preventing a catalyst from blocking a pipe outlet of the quenching tower of the fluidized bed methanol preparing propylene process. The lower part of the quenching tower is provided with a pipeline I communicated with a stable system; a disturbance medium is introduced into the pipeline I; and the disturbance medium is dry gas separated by the stable system. With the adoption of the technical scheme, the dry gas is increased at the bottom of the quenching tower to be used as the disturbance medium of the tower bottom to prevent the catalyst from being deposited; and the normal circulation of quenching water is guaranteed, and the catalyst at the bottom of the quenching tower of the fluidized bed methanol preparing propylene process is prevented from blocking an outlet pipeline, so that the aim of long-period operation is achieved.
Description
Technical field
The olefin hydrocarbon making by coal field that the invention belongs to more particularly, the present invention relates to a kind of fluid bed process for preparing propylene from methanol quench tower and prevents that catalyst from stopping up the method for pipe outlet.
Background technology
A kind of energy substitution project of olefin hydrocarbon making by coal technology early 1980s exploitation, the olefin hydrocarbon making by coal technology comprises coal mixed olefins processed and coal propylene technology processed, wherein methanol-to-olefins (MTO) and preparing propylene from methanol (MTP) are its representative art, coal methyl alcohol technology processed is ripe coal chemical technology, popularization and development along with this technology, the output of methyl alcohol is day by day superfluous, and propylene is as the also partial dependency import of main industrial chemicals.
The MTP technology adopts chilled water (chw) as process gas cooling and washing medium, but prior art has partial devices bottom quench tower owing to not establishing the disturbance medium, easily cause catalyst deposit after operation a period of time, even the phenomenon of obstruction chilled water (chw) outlet line and chilled water (chw) circulating pump, cause quench tower to be stopped work, can cause comprehensive shut-down when serious.Prior art has partial devices to use steam as the disturbance medium, and this perturbation scheme has not only been brought certain heat into, increases the cooling load of chilled water (chw) cooler, and has increased the discharge capacity of chilled water (chw), and steam is met the easy condensation of water, disturbance weak effect simultaneously; Also have partial devices to adopt nitrogen to make the disturbance medium, this mode can be brought inert gas into, the amount of discharging of system's dry gas after increasing behind the inert gas circulative accumulation, and not only the total recovery of propylene reduces, and environment is also had certain impact.
Summary of the invention
Problem to be solved by this invention provides a kind of disturbance medium that increases and prevents catalyst deposit bottom quench tower, guarantee that the chilled water (chw) circulation is normal, avoid fluid bed process for preparing propylene from methanol quench tower bottom catalyst deposit to stop up the fluid bed process for preparing propylene from methanol quench tower of outlet line method.
To achieve these goals, the technical scheme that the present invention takes is: a kind of fluid bed process for preparing propylene from methanol quench tower that provides, comprise the quench tower body, and the top of quench tower body is tower body, the bottom is tower reactor, and tower reactor is provided with the pipeline one that communicates with systems stabilisation.
Preferably, the quench tower body also is provided with the chilled water (chw) cooling recirculation system.
Preferably, the chilled water (chw) water inlet pipe of chilled water (chw) cooling recirculation system places the top of quench tower body, and the chilled water (chw) outlet pipe places the bottom of quench tower body.
Preferably, pipeline one places the bottom of tower reactor cooler and communicates with the tower reactor cooler.
Preferably, the process gas admission line places the upper end of the sidewall cooler of quench tower body, and the process gas pipeline of giving vent to anger places the top of quench tower.
A kind of fluid bed process for preparing propylene from methanol quench tower prevents that catalyst from stopping up the method for pipe outlet, and the pipeline one that described tower reactor communicates with systems stabilisation passes into the disturbance medium.
Preferably, the disturbance medium is the isolated dry gas of systems stabilisation.
Adopt technical scheme of the present invention, from the reaction system process gas that contains a small amount of catalyst out from quench tower the bottom enter with cat head spray and under chilled water (chw) contact, play the effect of cooling and washing, chilled water (chw) at the bottom of the tower is through the chilling water pump, the laggard chilling tank of filter and chilled water (chw) cooler, returning quench tower through the chilled water (chw) circulating pump again recycles, because action of gravitation, catalyst can be accumulated at the bottom of quench tower in sedimentation, long-time running meeting blocking pipeline equipment, by quench tower bottom increase dry gas as tower at the bottom of the disturbance medium prevent that catalyst deposit from preventing catalyst deposit, guarantee that the chilled water (chw) circulation is normal, avoid fluid bed process for preparing propylene from methanol quench tower bottom catalyst deposit to stop up outlet line, reach the purpose of long-term operation; Dry gas is the C that catalytic process produces
1, C
2The byproduct that belongs to catalytic reaction, is gathered materials on the spot as the disturbance medium with dry gas, and required pipeline is short, and pipe arrangement is simple, investment is low, and disturbance is effective, and is energy-saving and cost-reducing.Reduced simultaneously the outer discharge capacity of chilled water (chw), reduced the pollution to environment, prevented that the catalyst that runs damage from depositing, and improved the operational stability of quench tower greatly in quench tower pipeline and equipment.
Description of drawings
The below is briefly described the expressed content of each width of cloth accompanying drawing of this specification and the mark among the figure:
Fig. 1 is the schematic diagram of a kind of fluid bed process for preparing propylene from methanol of the present invention quench tower.
Be labeled as among the figure: 1, quench tower body; 2, process gas admission line; 3, pipeline one; 4, chilled water (chw) outlet pipe; 5, the process gas pipeline of giving vent to anger; 6, chilled water (chw) water inlet pipe.
The specific embodiment
The below contrasts accompanying drawing, by the description to embodiment, effect and operation principle, manufacturing process and operation using method etc. to the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, the each several part and annexation, each several part, be described in further detail, to help those skilled in the art inventive concept of the present invention, technical scheme had more complete, accurate and deep understanding.
Fig. 1 is the schematic diagram of a kind of fluid bed process for preparing propylene from methanol of the present invention quench tower; A kind of fluid bed process for preparing propylene from methanol quench tower that prevents of the present invention as shown in the figure, quench tower body 1 bottom is provided with the pipeline 1 that communicates with systems stabilisation, passes into the disturbance medium in the pipeline 1; The disturbance medium is the isolated dry gas of systems stabilisation; The top of quench tower body 1 is tower body, and the bottom is the tower reactor cooler, and the pipeline 1 that passes into the disturbance medium communicates with the tower reactor cooler; Dry gas is to absorb stable separating in the systems stabilisation; Quench tower body 1 also is provided with the chilled water (chw) cooling recirculation system, and the chilled water (chw) water inlet pipe 6 of chilled water (chw) cooling recirculation system places the top of quench tower body 1, and chilled water (chw) outlet pipe 4 places the bottom of quench tower body 1; Process gas admission line 2 places the upper end of the sidewall cooler of quench tower body 1, and the process gas pipeline 5 of giving vent to anger places the top of quench tower body 1; Adopt technical scheme of the present invention, from the reaction system process gas that contains a small amount of catalyst out from quench tower the bottom enter with cat head spray and under chilled water (chw) contact, play the effect of cooling and washing, chilled water (chw) at the bottom of the tower is through the chilling water pump, the laggard chilling tank of filter and chilled water (chw) cooler, returning quench tower through the chilled water (chw) circulating pump again recycles, because action of gravitation, catalyst can be accumulated in the sedimentation of 1 end of quench tower body, long-time running meeting blocking pipeline equipment, by quench tower bottom increase dry gas as tower at the bottom of the disturbance medium prevent that catalyst deposit from preventing catalyst deposit, guarantee that the chilled water (chw) circulation is normal, avoid fluid bed process for preparing propylene from methanol quench tower bottom catalyst deposit to stop up outlet line, reach the purpose of long-term operation; Dry gas is the C that the catalytic cracking process process produces
1, C
2, belong to the byproduct of catalytic reaction,, to gather materials on the spot as the disturbance medium with dry gas, required pipeline is short, and pipe arrangement is simple, investment is low, and disturbance is effective, and is energy-saving and cost-reducing.Reduced simultaneously the outer discharge capacity of chilled water (chw), reduced the pollution to environment, prevented that the catalyst that runs damage from depositing, and improved the operational stability of quench tower greatly in quench tower pipeline and equipment.
The above has carried out exemplary description to the present invention by reference to the accompanying drawings; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (7)
1. fluid bed process for preparing propylene from methanol quench tower, it is characterized in that: comprise the quench tower body, the top of quench tower body is tower body, and the bottom is tower reactor, and tower reactor is provided with the pipeline one that communicates with systems stabilisation.
2. according to a kind of fluid bed process for preparing propylene from methanol quench tower claimed in claim 1, it is characterized in that: described quench tower body also is provided with the chilled water (chw) cooling recirculation system.
3. according to a kind of fluid bed process for preparing propylene from methanol quench tower claimed in claim 2, it is characterized in that: the chilled water (chw) water inlet pipe of described chilled water (chw) cooling recirculation system places the top of quench tower body, and the chilled water (chw) outlet pipe places the bottom of quench tower body.
4. according to a kind of fluid bed process for preparing propylene from methanol quench tower claimed in claim 1, it is characterized in that: described pipeline one places the bottom of tower reactor cooler and communicates with the tower reactor cooler.
5. according to a kind of fluid bed process for preparing propylene from methanol quench tower claimed in claim 1, it is characterized in that: described process gas admission line place the quench tower body the upper end of sidewall cooler, the process gas pipeline of giving vent to anger places the top of quench tower body.
6. prevent that according to a kind of fluid bed process for preparing propylene from methanol quench tower claimed in claim 1 catalyst from stopping up the method for pipe outlet, it is characterized in that: the pipeline one that described tower reactor communicates with systems stabilisation passes into the disturbance medium.
7. stop up the method for pipe outlet according to a kind of fluid bed process for preparing propylene from methanol quench tower catalyst that prevents claimed in claim 6, it is characterized in that: described disturbance medium is the isolated dry gas of systems stabilisation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104307607A CN102908848A (en) | 2012-11-01 | 2012-11-01 | Quenching tower of fluidized bed methanol preparing propylene process and method for preventing catalyst from blocking pipe outlet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104307607A CN102908848A (en) | 2012-11-01 | 2012-11-01 | Quenching tower of fluidized bed methanol preparing propylene process and method for preventing catalyst from blocking pipe outlet |
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| CN102908848A true CN102908848A (en) | 2013-02-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002028442A (en) * | 2000-07-13 | 2002-01-29 | Nippon Mining & Metals Co Ltd | Method for incinerating industrial waste |
| CN101544529A (en) * | 2008-03-25 | 2009-09-30 | 中国石化集团洛阳石油化工工程公司 | Method and equipment for pre-treatment of reaction produced gas in olefin preparation technology by oxygen-containing compounds |
| CN201867312U (en) * | 2010-11-18 | 2011-06-15 | 安徽淮化股份有限公司 | Gas-liquid-solid three-phase simultaneously sampling device of fluidized bed reactor |
| CN102139180A (en) * | 2010-02-02 | 2011-08-03 | 天华化工机械及自动化研究设计院 | Refining catalyst spray drying tail gas/roasting tail gas purifying treatment method and equipment |
-
2012
- 2012-11-01 CN CN2012104307607A patent/CN102908848A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002028442A (en) * | 2000-07-13 | 2002-01-29 | Nippon Mining & Metals Co Ltd | Method for incinerating industrial waste |
| CN101544529A (en) * | 2008-03-25 | 2009-09-30 | 中国石化集团洛阳石油化工工程公司 | Method and equipment for pre-treatment of reaction produced gas in olefin preparation technology by oxygen-containing compounds |
| CN102139180A (en) * | 2010-02-02 | 2011-08-03 | 天华化工机械及自动化研究设计院 | Refining catalyst spray drying tail gas/roasting tail gas purifying treatment method and equipment |
| CN201867312U (en) * | 2010-11-18 | 2011-06-15 | 安徽淮化股份有限公司 | Gas-liquid-solid three-phase simultaneously sampling device of fluidized bed reactor |
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Application publication date: 20130206 |