CN101712412B - Catalyst unloading device - Google Patents
Catalyst unloading device Download PDFInfo
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- CN101712412B CN101712412B CN2009102643616A CN200910264361A CN101712412B CN 101712412 B CN101712412 B CN 101712412B CN 2009102643616 A CN2009102643616 A CN 2009102643616A CN 200910264361 A CN200910264361 A CN 200910264361A CN 101712412 B CN101712412 B CN 101712412B
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Abstract
The invention provides a catalyst unloading device and a method for removing solid catalyst or other solid material from a reactor. The remote end of the tube of a specially-made vacuum device is inserted into the solid catalyst, and a large quantity of fluid nozzles are connected with the cavity of the remote end area of the tube, so that the solid catalyst is loosened, and the loosened solid catalyst is sucked from the remote end to the near end of the tube along the tube. By adopting the device, the vacuum tube can be always positioned on the back of the bed layer of the catalyst, thereby improving the conveying efficiency. In addition, by directly inserting the tube into the reactor through a manhole, the overflow of the catalyst is avoided. In addition, an ideal air gap between the bed layer of the catalyst and a traditional vacuum tube conveyor which are closed to each other is required to be achieved, and the solid catalyst or other solid material can be removed because of the effect of a flow core. As gas is continuously and effectively conveyed to the remote end of the tube, the problem that material can not be conveyed when the distance inserted into the bed layer by a traditional vacuum tube exceeds a limit value can be avoided.
Description
Technical field
The present invention relates to a kind of later-model petrochemical equipment catalyst unloading device.
Background technology
The bed of hydrocracking unit is very high, and spent catalyst needs reuse, adopts existing vacuum apparatus to unload agent, and the percentage of damage of catalyst is higher, can not satisfy the requirement that spent catalyst needs reuse.
The process for unloading catalyst that CN1376765A relates to is the state-of-the-art process for unloading catalyst of present catalyst service industry, adopts fire retardant, and catalyst is carried out surface treatment, makes catalyst surface form the special film of one deck, then carries out vacuum and unloads agent.This method can provide the cleaner agent environment that unloads, but is not suitable for the increasingly high hydrocracking unit of bed, and the vacuum draw method and apparatus of employing causes the percentage of damage of catalyst higher.
CN1724137A, CN2808283Y relate to a kind of preparation-unloading method and device thereof of silver catalyst reactor; This method is a kind ofly in the catalyst reaction pipe, to feed high pressure gas; Install pumping equipment additional at the reaction tube top, the swabbing action of high pressure gas impulse force and pumping equipment is cooperated take silver catalyst out of discharge method that reaction tube is delivered to filtering recovering device.
CN1036931C relates to a kind of safety preparation-unloading method of hydrogenation plant, and the method for this invention is to stop work when hydrogenation plant, after temperature of reactor descends; Embathe catalyst with light oil, carry through hot hydrogen and remove light oil, again with nitrogen replacement hydrogen; Under nitrogen circulation, through little air, the control air amount makes the reaction bed temperature vertex be no more than F0 ℃ then; The incendive material slow oxidation of catalyst surface is burnt, got final product safety preparation-unloading then.Though there is more problem in this method possible in theory in practical operation, have potential safety hazard.
Be directed against the catalyst unloading of hydrocracking unit at present; Also do not form a kind of practicable preparation-unloading method and device that can obviously reduce the catalyst breakage rate; Research and develop later-model device for discharging and can not only solve existing problem, can also reduce the catalyst unloading time, reduce the loss of catalyst; Help the recycling of catalyst, increase economic benefit of enterprises.
Catalyst unloading generally is to prolong pipe with one to be connected on the vacuum draw assembly, is used for from reaction vessel, removing spent catalyst, also can be with auger stripper with catalyst from the delivered inside of reaction vessel to suction hose, this flexible pipe is positioned at the outside of container.These two kinds of methods all are side opening or manhole through reaction vessel, and pipe or auger are inserted in the bed.Use first method need keep between end and the beds of suction tube a suitable air gap being arranged, when the distance in pipe inserts container is oversize, flow owing to lack delivering gas, flowing of catalyst also stopped.Use second method that a main shortcoming is arranged; The auger that rotates is inserted bed, catalyst overflow frequent generation, auger easy blocking; Often go wrong, to workmen's health of human body and surrounding environment all is harmful to and the percentage of damage of catalyst than higher.
Summary of the invention
Problem that exists to existing process for unloading catalyst and increasingly high characteristics of hydrogenation plant at present, the present invention has designed a kind of later-model catalyst unloading device, and that can not only improve catalyst unloads agent efficient, and can significantly reduce the percentage of damage of catalyst.Its technical scheme is:
A kind of vacuum; It is made up of a long cylindrical tube, and the base portion of said cylindrical tube has a tube wall of solid circles cylindricality in fact, also is the inner chamber of cylindrical tube; It is characterized in that: the near-end middle part of said cylindrical tube links to each other with the outside; The far-end of said cylindrical tube is by the annular chamber that inside and outside tube wall constituted of pipe, and said annular chamber is an osed top at the far-end of cylindrical tube, and a large amount of holes is arranged on the tube wall of said annular chamber interior cylindrical; Said hole communicates said annular chamber with the inner chamber of said cylindrical tube; The chamber of a narrow connection links to each other with columniform tube wall through the intercommunicating pore on the said annular chamber along the longitudinal extension of said cylindrical tube, and inlet is positioned at the near-end of said cylindrical tube.
A kind of catalyst unloading device that uses above-mentioned vacuum; It comprises vacuum and reaction vessel; It is characterized in that: the side opening of said reaction vessel or manhole insert said vacuum in the bed of catalyst; The near-end of said vacuum middle part links to each other with suction hose, and the inlet of said vacuum links to each other with the flexible pipe that is used for supplying with pressure gas.
A kind of process for unloading catalyst is characterized in that, vacuum is inserted in the bed of catalyst via the side opening or the manhole of reaction vessel; Before inserting, start earlier with suction hose bonded assembly vacuum pump, be used for catalyst is transported to suction hose along cylindrical tube; Simultaneously, the pressure gas of inlet is supplied with also and is started, and forces pressure gas to enter into the annular chamber that is arranged in the cylindrical tube far-end along narrow connection, the compelled inner chamber that enters into cylindrical tube from the hole of pressure gas; A large amount of flow solids catalyst that is positioned at the cylindrical tube far-end is sucked into the near-end of cylindrical tube along cylindrical tube, enters in filter assemblies and the vacuum pump along suction hose then.
Effect of the present invention is: catalyst unloading device of the present invention, that can not only improve catalyst unloads agent efficient, and can significantly reduce the percentage of damage of catalyst.
Description of drawings
Fig. 1 is the fragmentary perspective view of vacuum of the present invention.
Fig. 2 is the simplified diagram that the present invention unloads the agent device.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done explanation in further detail.
As shown in Figure 1, the fragmentary perspective view of vacuum of the present invention.
First aspect of the present invention; This vacuum is made up of a prolongation pipe of confirming the aperture; The near-end of pipe is connected with pumping components; Be used for along internal diameter catalyst being transported to the near-end of pipe from distant place one end of pipe, equipment has ejection assemblies, and this assembly is incorporated into a large amount of pressure gas spouts in the inner chamber of remote area of pipe.The hole of preferably a large amount of pressure gas spouts is to be in pipe cross-directional longitudinally, in the inner chamber of the entering pipe of useful is compression shower nozzle direct radiation shape.
In general, ejection assemblies is made up of a large amount of injection holes, and injection hole is positioned at the far-end of pipe, communicates with the inside diameter surface of pipe.Injection hole is connected the chamber that the internal diameter of pipe and surfaces externally and internally on pipe limit, and the chamber is sealed by the far-end of pipe.When the inner chamber of pipe and pipe when all being cylindrical, the chamber is exactly in fact the object of a ring-type.Ejection assemblies is connected with the feeding assembly of pressure gas, in general adopts pressurized air or nitrogen.
It generally is the near-end (normally through a connecting bore) that is positioned at pipe that the supply of pressure gas connects.Pipeline for fluids or pipeline extend along the near-end of pipe and this part pipeline between the far-end, and are connected with ejection assemblies.Pipeline for fluids or pipeline preferably are positioned at outside the pipe, and along the zone line that surfaces externally and internally limited of pipe, and should the zone narrow comparatively speaking.
Pipe is caused by metallic material, perhaps also can adopt crash-resistant plastics.Insert in the industrial reactor through a manhole or port, and reaction vessel mainly is to contain solid catalyst.
Agent device A is just unloaded in this invention, is made up of a long columniform pipe B, and the near-end middle part of pipe B links to each other with a flexible pipe X, manages X and a filter assemblies link to each other with vacuum pump (not drawing among the figure).The main portion of pipe B has a tube wall J of solid circles cylindricality (generally being caused by metal or plastics) in fact, also is the inner chamber of columniform pipe, and the far-end H of pipe is by the chamber G of the annular that inside and outside tube wall constituted of pipe.Chamber G is an osed top at the far-end H place of pipe B.A large amount of hole I is arranged on the tube wall of chamber G interior cylindrical, and hole I communicates the chamber G of annular with the inner chamber of pipe B.
The chamber E of a narrow connection links to each other with columniform tube wall J through the intercommunicating pore F on the chamber G of annular along the longitudinal extension of pipe B, and inlet D is positioned at the near-end of pipe B.Inlet D links to each other with the flexible pipe K that is used for supplying with pressure gas (generally being atmosphere or nitrogen).
As shown in Figure 2, the present invention unloads the simplified diagram of agent device.
Second aspect according to invention; This invention provides a kind of process for unloading catalyst; This method mainly is in the far-end insertion catalyst with pipe, and the structure of pipe is just of first aspect, and a large amount of fluid spouts links to each other with the inner chamber of the remote area of pipe; Thereby cause the loosening of catalyst, and loosening catalyst the near-end to pipe is aspirated along pipe from far-end.
Catalyst unloading device of the present invention, it comprises above-mentioned vacuum A and reaction vessel M, and the near-end C of vacuum A middle part links to each other with suction hose X, and the inlet D of vacuum A links to each other with the flexible pipe K that is used for supplying with pressure gas, and P is the tower tray of reaction vessel.
In use, side opening or the manhole O through reaction vessel M inserts vacuum lamp B in the bed of catalyst n.Before inserting, start earlier with suction hose X bonded assembly vacuum pump, be used for catalyst n is transported to suction hose X along pipe B.Now, the pressure gas of inlet is supplied with also and is started, and forces pressure gas to enter into the annular chamber G that is arranged in pipe B far-end along narrow connected chamber E.Pressure gas is compelled, and I (having played the effect of shower nozzle or nozzle) enters into the inner chamber of managing B from the hole.
The part of the inner chamber of the pipe B that is limited by annular chamber G is as a mobile core, and solid catalyst is located in this mobile core closely, perhaps will manage B to be inserted in the bed, in the influence current downflow of pressure gas via hole I.This just causes a large amount of flow solids catalyst that is positioned at pipe B far-end H along the near-end C that pipe B is sucked into pipe B, enters into (not shown) in filter assemblies and the vacuum pump along suction hose X then.Use this device just can make vacuum lamp, thereby improved transport efficiency always at the back of beds.In addition, directly will manage B via manhole O and insert in the reaction vessel M and avoided overflowing of catalyst, thus the problem that also can occur with regard to the employing auger conveying of being mentioned before having avoided.
At the desirable air gap that closely must reach between beds and the traditional vacuum tube conveyor since the effect of the core that flows just can remove.Because to supplying with actv. continuously of the delivering gas of the far-end H of pipe, the problem that the distance of inserting bed when traditional vacuum tube can't transportation of substances during above limits value then can be avoided.
Though the present invention with preferred embodiment openly as above; But they are not to be used for limiting the present invention; Anyly be familiar with this art; In spirit that does not break away from the present invention and scope, certainly when can doing various variations or retouching, so being as the criterion of should being defined with the application's claim protection domain of protection scope of the present invention.
Claims (7)
1. vacuum; It is made up of a long cylindrical tube, and the base portion of said cylindrical tube has a tube wall of solid circles cylindricality in fact, also is the inner chamber of cylindrical tube; It is characterized in that: the near-end middle part of said cylindrical tube links to each other with the outside; The far-end of said cylindrical tube is by the annular chamber that inside and outside tube wall constituted of pipe, and said annular chamber is an osed top at the far-end of cylindrical tube, and a large amount of holes is arranged on the tube wall of said annular chamber interior cylindrical; Said hole communicates said annular chamber with the inner chamber of said cylindrical tube; The chamber of a narrow connection links to each other with columniform tube wall through the intercommunicating pore on the said annular chamber along the longitudinal extension of said cylindrical tube, and inlet is positioned at the near-end of said cylindrical tube.
2. vacuum according to claim 1 is characterized in that: said cylindrical tube is caused by metallic material, is perhaps caused by crash-resistant plastic material.
3. vacuum according to claim 1 and 2 is characterized in that: said inlet links to each other with the flexible pipe that is used for supplying with pressure gas.
4. catalyst unloading device; It comprises described vacuum of claim 1 and reaction vessel; It is characterized in that: the side opening of said reaction vessel or manhole insert said vacuum in the bed of catalyst; The near-end of said vacuum middle part links to each other with suction hose, and the inlet of said vacuum links to each other with the flexible pipe that is used for supplying with pressure gas, and tower tray is positioned at the top of reaction vessel.
5. a process for unloading catalyst is characterized in that, in the side opening or the bed of manhole with the described vacuum insertion of claim 1 catalyst via reaction vessel; Before inserting, start earlier with suction hose bonded assembly vacuum pump, be used for catalyst is transported to suction hose along cylindrical tube; Simultaneously, the pressure gas of inlet is supplied with also and is started, and forces pressure gas to enter into the annular chamber that is arranged in the cylindrical tube far-end along narrow connection, and pressure gas is compelled to enter into the inner chamber of cylindrical tube from being arranged at hole on the columniform tube wall; A large amount of flow solids catalyst that is positioned at the cylindrical tube far-end is sucked into the near-end of cylindrical tube along cylindrical tube, enters in filter assemblies and the vacuum pump along suction hose then.
6. process for unloading catalyst according to claim 5 is characterized in that: said pressure gas is atmosphere or nitrogen; Said vacuum is caused by metal or plastics.
7. according to claim 5 or 6 described process for unloading catalyst, it is characterized in that: the hole of said pressure gas spout is to be in pipe cross-directional longitudinally, in the inner chamber of the entering cylindrical tube of compression shower nozzle direct radiation shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102643616A CN101712412B (en) | 2009-12-21 | 2009-12-21 | Catalyst unloading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102643616A CN101712412B (en) | 2009-12-21 | 2009-12-21 | Catalyst unloading device |
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| CN101712412A CN101712412A (en) | 2010-05-26 |
| CN101712412B true CN101712412B (en) | 2012-03-14 |
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| CN2009102643616A Active CN101712412B (en) | 2009-12-21 | 2009-12-21 | Catalyst unloading device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102059079B (en) * | 2010-12-09 | 2013-02-27 | 江苏天鹏石化特种工程有限公司 | Catalyst crushing and absorbing device of tubular reactor |
| CN105363389A (en) * | 2015-12-22 | 2016-03-02 | 江苏天鹏石化特种工程有限公司 | Breakage prevention device for suction of catalysts |
| CN105597629B (en) * | 2015-12-31 | 2018-01-26 | 河南开祥精细化工有限公司 | A kind of instrument for extracting formaldehyde catalyst |
| CN105749814B (en) * | 2016-03-30 | 2019-02-01 | 武汉工程大学 | Full-automatic chemical reaction tower catalyst cleaning plant |
| CN106111021A (en) * | 2016-07-01 | 2016-11-16 | 武汉工程大学 | A kind of cleaning plant of reaction tower inner catalyst |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5222533A (en) * | 1990-10-10 | 1993-06-29 | Basf Corporation | Nozzle for use in a catalyst unloader |
| US5228484A (en) * | 1991-06-20 | 1993-07-20 | Catalyst Technology, Inc. | Air lance reel for catalyst unloading of tubular reactors |
| CN1140628A (en) * | 1995-07-14 | 1997-01-22 | 中国石油化工总公司石油化工科学研究院 | Handling method for fixed bed reactor catalyst and its main equipment |
| CN101328101A (en) * | 2008-06-12 | 2008-12-24 | 中国石油化工股份有限公司 | Rapid parking method of methanol to olefins reaction-regeneration system |
-
2009
- 2009-12-21 CN CN2009102643616A patent/CN101712412B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5222533A (en) * | 1990-10-10 | 1993-06-29 | Basf Corporation | Nozzle for use in a catalyst unloader |
| US5228484A (en) * | 1991-06-20 | 1993-07-20 | Catalyst Technology, Inc. | Air lance reel for catalyst unloading of tubular reactors |
| CN1140628A (en) * | 1995-07-14 | 1997-01-22 | 中国石油化工总公司石油化工科学研究院 | Handling method for fixed bed reactor catalyst and its main equipment |
| CN101328101A (en) * | 2008-06-12 | 2008-12-24 | 中国石油化工股份有限公司 | Rapid parking method of methanol to olefins reaction-regeneration system |
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| CN101712412A (en) | 2010-05-26 |
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Address after: Nanjing City, Jiangsu province 210001 Longpan Road No. 418 building -336 Patentee after: Jiangsu Peng petrochemical Polytron Technologies Inc Address before: Nanjing City, Jiangsu province 210001 Longpan Road No. 418 building -336 Patentee before: Tianpeng Special Petrochemical Engineering Co., Ltd., Jiangsu |