CN103100350B - Sediment incrustation basket - Google Patents
Sediment incrustation basket Download PDFInfo
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- CN103100350B CN103100350B CN201110351693.5A CN201110351693A CN103100350B CN 103100350 B CN103100350 B CN 103100350B CN 201110351693 A CN201110351693 A CN 201110351693A CN 103100350 B CN103100350 B CN 103100350B
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- Prior art keywords
- sediment incrustation
- screen tray
- shape
- incrustation basket
- circle
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- 239000013049 sediment Substances 0.000 title claims abstract description 60
- 239000004744 fabric Substances 0.000 claims abstract description 26
- 239000003054 catalyst Substances 0.000 claims abstract description 24
- 239000003223 protective agent Substances 0.000 claims description 7
- 229910052573 porcelain Inorganic materials 0.000 claims description 4
- 239000011324 bead Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 abstract description 17
- 239000002994 raw material Substances 0.000 abstract description 17
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 239000007788 liquid Substances 0.000 description 16
- 239000010410 layer Substances 0.000 description 10
- 238000001914 filtration Methods 0.000 description 7
- 150000001336 alkenes Chemical class 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000002199 base oil Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 3
- 238000005504 petroleum refining Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Filtering Materials (AREA)
Abstract
The present invention relates to a kind of sediment incrustation basket for fixed bed reactors, belong to petrochemical plant field.It comprises: sediment incrustation basket framework, is arranged on the outer screen cloth on framework and the interior screen tray being arranged in described lower portion.Can the impurity such as black dirt effectively in filter liquide raw material according to sediment incrustation basket of the present invention, alleviate in the course of reaction impurity difficult problem in sediment incrustation basket and the fouling of fixed bde catalyst bed contact surface, extend the working time of sediment incrustation basket, also extend the service time of catalyst.
Description
Technical field
The present invention relates to a kind of sediment incrustation basket, relate more specifically to a kind of sediment incrustation basket for fixed bed reactors.
Background technology
In the fixed bed hydrogenation reactor in petroleum refining field, liquid charging stock usually can with a certain amount of impurity from upstream equipment.When being entrained with the liquid charging stock of impurity when flowing through beds, impurity can be deposited in beds " space " and form dirt, " space " of beds is reduced, until " space " of beds " is full of " by dirt.This can cause fluid skewness in bed, and the carbon deposit that dirt can produce in course of reaction is combined, and forms dirty layer, choked flow circulation passage, causes liquid charging stock skewness.In addition, dirty layer can tire out at catalyst bed surface layer and form shell at catalyst top layer.This will cause reactor internal drop to raise, and reduce the service efficiency of catalyst, can crush time serious tower tray, causes unplanned shutdown.Meanwhile, because hydrogenation reaction is exothermic reaction, on the radial section of beds, temperature contrast can be produced due to the difference of the extent of reaction, even there will be hot-spot, the performance of infringement catalyst, thus greatly reduce the life cycle of catalyst.
In order to solve the problem, the process of slash head can be carried out to reactor, but the slash head work used time be longer, and skim the normal operation that head can affect reaction unit.Also sediment incrustation basket can be set in fixed bed reactors, to control the pressure drop in fixed bed reactors better.Generally according to the character of liquid charging stock and device operating mode, several sediment incrustation baskets can be set in the reactor with the impurity in interception, filtration and deposit liquid raw material.In addition, sediment incrustation basket can also increase circulation area, is convenient to fluid and passes through.
Common sediment incrustation basket is barrel-like structure, and its outside is wrapped with screen cloth, and is placed in porcelain ball bed.At present, widely used sediment incrustation basket mostly is opened type, close mouth formula and profile of tooth mouth formula.
In actual applications, because sediment incrustation basket is directly placed on the surface of beds, after running after a while, produce dirt in beds around sediment incrustation basket and around and block, liquid phase is flowed, and path length is short differs, directly affect liquid phase being uniformly distributed on beds, dirt shell can be formed time serious, cause the problems such as reactor internal drop rising.In addition, in fixed bed reactors in the field such as petroleum refining, organic chemical industry, the dirt deposition phenomenon at beds top is also very general, therefore how to solve the scale problems with fixed bde catalyst bed top around sediment incrustation basket, the prolongation service time of sediment incrustation basket and the running time of catalyst become the major issue in the field such as petroleum refining, organic chemical industry.
Summary of the invention
For above-mentioned problem, the present invention proposes a kind of sediment incrustation basket for fixed bed reactors, impurity such as its black dirt that can effectively contain in filter liquide raw material, thus it is serious to alleviate sediment incrustation basket and the fouling of catalyst top in equipment running process, sediment incrustation basket and catalyst runs time short problem.
According to the present invention, provide a kind of sediment incrustation basket for fixed bed reactors, it comprises cylindrical frame, installation outer screen cloth on said frame, and is arranged in the interior screen tray in described framework.
According to an embodiment, described interior screen tray is screen tray in the scarce shape of circle.In another embodiment, multiple described circle lacks screen tray level with one another in shape and is arranged in described framework abreast, and adjacent two circles lack the breach of screen tray in shape and stagger each other, preferably stagger 180 °.In a preferred embodiment, at least 2 layers of circle are installed in described framework and lack screen tray in shape, be preferably 8-12 layer.
Circle lacks screen tray in shape and can make to go wrong when an interior screen tray, such as, time blocked, liquid charging stock can lack from its circle and flows out into screen tray in lower floor and the use that do not affect screen tray in lower floor, thus makes sediment incrustation basket of the present invention have longer service time.The circle that stratiform is installed to lack in shape screen tray can continuous filtration of liquids raw material, the impurity of the liquid charging stock entered in catalyst layer is reduced to minimum, its be 180 ° to be staggered installation of the flow path also making liquid charging stock in sediment incrustation basket the longest, sediment incrustation basket filtering function realizes maximizing.
According to an embodiment, the whole edge that described circle lacks screen tray in shape is provided with Pan Bi, it extends along the flow direction of the plane lacking screen tray in shape perpendicular to described circle against material.In a preferred embodiment, the extended height of described Pan Bi is 1-3cm.
According to an embodiment, lack on trying to get to the heart of a matter of screen tray in shape and Pan Kou at described circle and be provided with screen cloth, its mesh is closeer than the mesh on described outer screen cloth.In a preferred embodiment, the mesh on described outer screen cloth is 40-60 order, described circle lack screen tray in shape try to get to the heart of a matter and Pan Kou on screen cloth on mesh be 100-300 order.Therefore, outer screen cloth can be used for the large granular impurity in preliminary filter liquide raw material, thus screen tray in protection, interior screen tray can be used for the impurity in further filter liquide raw material.
According to an embodiment, lack in shape at described circle, in screen tray, catalyst protective agent is housed.In a preferred embodiment, the bead of described catalyst protective agent to be diameter be 1-3mm, its composition is 2wt%Ni-1wt%Mg/ α-Al
2o
3.It is for making the some olefin hydrotreated lube base oil in raw material, reduces the content of alkene in raw material.
According to an embodiment, described interior screen tray is fixed on the inner surface of described framework by connector.
According to of the present invention for fixed bed reactors sediment incrustation basket, it is installed between the porcelain ball filter course of described fixed bed reactors and beds.
Compared with prior art, the invention has the beneficial effects as follows: by using circle to lack screen tray in shape, can ensure to go wrong at an interior screen tray, such as, time blocked, do not affect the use of screen tray in its lower floor, and then ensure that sediment incrustation basket of the present invention has longer service time.The level with one another circle that stratiform is installed abreast to lack in shape screen tray can continuous filtration of liquids raw material, the impurity of the liquid charging stock entered in catalyst layer is reduced to minimum, its be 180 ° to be staggered installation of the flow path also making liquid charging stock in sediment incrustation basket the longest, the filtering function of sediment incrustation basket realizes maximizing.The level with one another circle that stratiform is installed abreast lacks screen tray surface in top that screen tray in shape also makes incrustation phenomenon first can occur in this sediment incrustation basket, then screen tray surface dirt in each from top to bottom, the last contact surface just occurring in sediment incrustation basket and beds, thus also can extend the service time of sediment incrustation basket, and alleviate impurity in the course of reaction Raw difficult problem in sediment incrustation basket and the fouling of fixed bde catalyst bed contact surface, extend the service time of catalyst.In addition; the mesh of interior screen cloth is closeer than the mesh of outer screen cloth; because screen cloth and interior screen tray in addition realize multistage filtering to liquid charging stock, the large granular impurity in outer screen cloth energy filter liquide raw material thus screen tray in protection, interior screen tray is used for the impurity in further filter liquide raw material.In interior screen tray, catalyst protective agent is housed, can impurity in filter liquide raw material time, by the some olefin hydrotreated lube base oil in raw material, reduce the content of alkene in raw material.
Accompanying drawing explanation
Also with reference to accompanying drawing, the present invention is described in more detail based on different embodiments hereinafter.Wherein:
Fig. 1 is the Facad structure schematic diagram according to sediment incrustation basket framework of the present invention;
Fig. 2 is the sectional view according to sediment incrustation basket of the present invention;
Fig. 3 is the top view that circle according to the present invention lacks screen tray in shape.
In each width figure, identical component is indicated by similar Reference numeral.Accompanying drawing is not according to the scale of reality.
Detailed description of the invention
Below in conjunction with accompanying drawing, sediment incrustation basket of the present invention is described further.
Fig. 1 shows according to sediment incrustation basket 10 of the present invention, and it is cylindrical-shaped structure, comprises framework 11 and is arranged on the outer screen cloth 12 on two bottom surfaces of framework 11 and whole side.The specification of outer screen cloth 12 such as can be 40-60 order.Sediment incrustation basket 10 according to the present invention also comprises and is arranged on screen tray in framework 11.Specifically, interior screen tray is fixed on the inner surface of framework 11 by connector.
Fig. 2 shows sediment incrustation basket 20 according to an embodiment of the invention.In this embodiment, interior screen tray is screen tray 25 in the scarce shape of circle.In the application, multiple described circle is lacked screen tray 25 level with one another in shape and be arranged in abreast in described framework 11, and adjacent two circles lack the mode that in shape, screen tray 25 staggers each other with its breach installs, preferably, the angle staggered is 180 °.In one embodiment, at least 2 layers of circle being installed in described framework and lacking screen tray 25 in shape, being preferably 8-12 layer, as being provided with 11 layers in the present embodiment.Circle lacks screen tray 25 in shape on its whole edge, is provided with dish wall 26, and it extends against Flow of Goods and Materials direction with the plane perpendicular to interior screen tray 25, and in a concrete example, the height of dish wall 26 is 1-3cm.In the scarce shape of circle, the screen cloth of trying to get to the heart of a matter of screen tray 25 should be chosen as and have closeer mesh than outer screen cloth 12, and in one embodiment, its specification is 100-300 order.
In a preferred embodiment, lack screen tray 25 inside in shape at circle and a certain amount of catalyst protective agent 23 is housed, its effect is the some olefin hydrotreated lube base oil made in raw material, reduces the content of alkene in raw material.In one embodiment, catalyst protective agent 23 for diameter be the bead of 1-3mm, its composition is 2wt%Ni-1wt%Mg/ α-Al
2o
3.The dish mouth 24 that circle lacks screen tray 25 in shape is covered by screen cloth, and the specification of screen cloth is identical with screen cloth of trying to get to the heart of a matter.
In actual process process, sediment incrustation basket 20 is installed between the porcelain ball filter course of reactor and beds.After the liquid charging stock with impurity such as black dirts enters reactor, first can be filtered by the outer screen cloth 12 of sediment incrustation basket.Entering in sediment incrustation basket after 20, reaction raw materials is filtered step by step by screen tray 25 in sediment incrustation basket inside.Liquid charging stock, after multistage filtering, just can enter beds.Because the mesh of interior screen cloth is closeer, in the top that incrustation phenomenon first can occur in this sediment incrustation basket screen tray surface, then from top to bottom screen tray surface dirt in each, finally just occurs on the contact surface of sediment incrustation basket and beds.So just effectively extend the working time of sediment incrustation basket, alleviate the difficult problem of the impurity such as the black dirt in course of reaction in liquid charging stock in sediment incrustation basket and the fouling of fixed bde catalyst bed contact surface, thus extend the working time of sediment incrustation basket, also extend the service time of catalyst.
Although invention has been described with reference to preferred embodiment, without departing from the scope of the invention, various improvement can be carried out to it and parts wherein can be replaced with equivalent.The present invention is not limited to specific embodiment disclosed in literary composition, but comprises all technical schemes fallen in the scope of claim.
Claims (11)
1. for a sediment incrustation basket for fixed bed reactors, comprise cylindrical frame (11), the outer screen cloth (12) be arranged on two bottom surfaces of described framework and whole side, and be arranged in the interior screen tray in described framework,
Described interior screen tray is screen tray (25) in the scarce shape of circle,
Multiple described circle lacks screen tray level with one another in shape and is arranged in described framework abreast, and adjacent two circles lack the breach of screen tray in shape and stagger each other.
2. sediment incrustation basket according to claim 1, is characterized in that, adjacent two circles lack the breach of screen tray in shape and stagger 180 °.
3. sediment incrustation basket according to claim 1, is characterized in that, installs at least 2 layers of circle and lack screen tray in shape in described framework.
4. sediment incrustation basket according to claim 3, is characterized in that, installs 8-12 layer circle and lack screen tray in shape in described framework.
5. sediment incrustation basket according to claim 1, is characterized in that, the whole edge that described circle lacks screen tray in shape is provided with Pan Bi (26), and it extends along the flow direction of the plane lacking screen tray in shape perpendicular to described circle against material.
6. sediment incrustation basket according to claim 5, is characterized in that, the extended height of described Pan Bi is 1-3cm.
7. the sediment incrustation basket according to any one in claim 1 to 6, is characterized in that, the He Pankou that tries to get to the heart of a matter (24) that described circle lacks screen tray in shape is provided with screen cloth, and its mesh is closeer than the mesh on described outer screen cloth.
8. sediment incrustation basket according to claim 7, is characterized in that, the mesh on described outer screen cloth is 40-60 order, described circle lack screen tray in shape try to get to the heart of a matter and Pan Kou on screen cloth on mesh be 100-300 order.
9. sediment incrustation basket according to claim 1, is characterized in that, lacks in shape catalyst protective agent (23) is housed in screen tray at described circle.
10. sediment incrustation basket according to claim 9, is characterized in that, the bead of described catalyst protective agent to be diameter be 1-3mm, its composition is 2wt%Ni-1wt%Mg/ α-Al
2o
3.
11. sediment incrustation baskets according to claim 1, is characterized in that, described sediment incrustation basket is installed between the porcelain ball filter course of described fixed bed reactors and beds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110351693.5A CN103100350B (en) | 2011-11-09 | 2011-11-09 | Sediment incrustation basket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110351693.5A CN103100350B (en) | 2011-11-09 | 2011-11-09 | Sediment incrustation basket |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103100350A CN103100350A (en) | 2013-05-15 |
| CN103100350B true CN103100350B (en) | 2015-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110351693.5A Active CN103100350B (en) | 2011-11-09 | 2011-11-09 | Sediment incrustation basket |
Country Status (1)
| Country | Link |
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| CN (1) | CN103100350B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107866191B (en) * | 2016-09-26 | 2020-06-23 | 中石化洛阳工程有限公司 | Filtering equipment in fixed bed hydrogenation reactor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2424814Y (en) * | 2000-01-07 | 2001-03-28 | 中国石化石家庄炼油厂 | Coking fractional column |
| CN1765477A (en) * | 2004-10-29 | 2006-05-03 | 中国石油化工股份有限公司 | A fouling dispenser |
-
2011
- 2011-11-09 CN CN201110351693.5A patent/CN103100350B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2424814Y (en) * | 2000-01-07 | 2001-03-28 | 中国石化石家庄炼油厂 | Coking fractional column |
| CN1765477A (en) * | 2004-10-29 | 2006-05-03 | 中国石油化工股份有限公司 | A fouling dispenser |
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| Publication number | Publication date |
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| CN103100350A (en) | 2013-05-15 |
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