CN101279226B - Filter device in gas-liquid co-current flow fixed bed reactor - Google Patents
Filter device in gas-liquid co-current flow fixed bed reactor Download PDFInfo
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- CN101279226B CN101279226B CN2008100498613A CN200810049861A CN101279226B CN 101279226 B CN101279226 B CN 101279226B CN 2008100498613 A CN2008100498613 A CN 2008100498613A CN 200810049861 A CN200810049861 A CN 200810049861A CN 101279226 B CN101279226 B CN 101279226B
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- 239000007788 liquid Substances 0.000 title claims abstract description 33
- 239000003223 protective agent Substances 0.000 claims description 39
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 239000003463 adsorbent Substances 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 abstract description 66
- 238000005984 hydrogenation reaction Methods 0.000 abstract description 15
- 238000009434 installation Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 5
- 238000005504 petroleum refining Methods 0.000 abstract description 4
- 230000035611 feeding Effects 0.000 description 64
- 239000003054 catalyst Substances 0.000 description 37
- 229910052573 porcelain Inorganic materials 0.000 description 25
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- 239000013049 sediment Substances 0.000 description 20
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- 238000000034 method Methods 0.000 description 7
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- 238000010438 heat treatment Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
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- 229930195733 hydrocarbon Natural products 0.000 description 3
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 239000002253 acid Substances 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 238000009903 catalytic hydrogenation reaction Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention disclose a filter plant in a fixed bed reactor with parallel current of gas and liquid in the field of petroleum refining, organic chemical industry and so on, which aims at solving the problems of troublesome installation, occupying effective space of the reactor, being unable to evenly filter the filth in a liquid phase filling on a horizontal cross-section of the reactor and so on existing in a dirt-excluding basket used for the existing reactor. The filter plant comprises a fixed tray frame (1) with a round horizontal cross-section and a plurality of filter tanks (2) in the fixed tray frame; the filter tanks are symmetrically arranged along the diameter direction of the horizontal cross-section of the fixed tray frame; the filter tanks are provided with a bottom surface and a side face which are composed of a net bar trap valve (7) as well as an opening structure at the top; a bar gap (4) is left between the filter tanks; the filter tanks, the filter tanks and the fixed tray frame are connected via active connecting pieces (4). The filter plant is mainly used for a hydrogenation reactor of the fixed bed and is also suitable for other fixed bed reactors with parallel current of gas and liquid, so as to filter the filth contained in the liquid phase filling.
Description
Technical field
The present invention relates to a kind of filter plant that is used in the gas and liquid flowing fixed bed reactors in the technical fields such as petroleum refining, organic chemical industry, be used for filtering the dirt that liquid phase feeding contains.
Background technology
The hydrocarbon raw material fixed bed hydrogenation reactor in petroleum refining field contains solid particles such as suspended particulate, rust deposite, sediment in the liquid phase feeding (hydrocarbon raw material) usually, and big molecule colloid, carbon residue, iron naphthenate etc.In a single day these dirts enter (mainly being catalyst top bed) in the beds, will deposit, and the choked flow circulation passage causes liquid phase feeding and gas-phase feed (hydrogen) skewness rapidly; The catalyst pore volume is descended greatly, thereby catalyst activity and catalyst service efficiency are reduced.Simultaneously,, on the beds radial section, can produce temperature contrast owing to the difference of the extent of reaction, even hot-spot can occur, damage the performance of catalyst, reduce the life cycle of catalyst greatly because hydrogenation reaction is exothermic reaction.Dirt deposits on beds and also can cause bed pressure drop to raise even obstruction, and the tower tray that can crush when serious causes improper shut-down, shortens service cycle, increases operating cost.
As everyone knows, liquid phase feeding all adopted the mechanical filter method to carry out filtration treatment before entering fixed bed hydrogenation reactor usually, mixed with gas-phase feed after the filtration again, entered reactor by the feed entrance on the reactor head end socket after heat exchange, heating.But this step is filtered the most of mechanical admixture (mechanical admixture is meant the insoluble dirt in the liquid phase feeding, for example solid particles such as suspended particulate, rust deposite, sediment) that only can remove in the liquid phase feeding.Remaining mechanical admixture enters in the reactor with liquid phase feeding, still can be deposited on the bed of catalyst top, causes problems such as bed obstruction, pressure drop rising and catalyst activity reduction.For addressing the above problem, the method that generally adopts in the prior art is according to liquid phase feeding character and reaction unit operating mode, and several sediment incrustation baskets are set in reactor, the dirt in interception, filtration, the deposition liquid phase feeding; Referring to the 17th page relevant introduction in " petrochemical equipment technology " the 1st phase of nineteen ninety-five " development of hydrogenation reactor inner member " literary composition.Common sediment incrustation basket is a core structure, wraps up in screen cloth outward, places in the porcelain ball bed of catalyst top bed upper surface; Lay the protective agent bed below the porcelain ball bed.Sediment incrustation basket hangs on the beam more, between string with chain.Facts have proved that the installation of sediment incrustation basket is very loaded down with trivial details, and sediment incrustation basket to take the reactor useful space bigger, thereby can reduce the reactor effective volume, reduce catalyst inventory.Because sediment incrustation basket is to disperse to install, and can not filter the dirt in the liquid phase feeding on the horizontal cross-section of reactor equably.The more important thing is that catalyst top bed upper surface is not provided with the zone of sediment incrustation basket and can not leans on sediment incrustation basket to filter; The incrustation ability of sediment incrustation basket can not be given full play to, and its incrustation capacity utilization ratio is not high.Because sediment incrustation basket directly places in the porcelain ball bed of catalyst top bed upper surface, makes liquid phase feeding different in size to the flow path of catalyst top bed from sediment incrustation basket, can directly influence the uniformity that liquid phase feeding distributes on the bed of catalyst top.In addition, sediment incrustation basket also usually stops up after running after a while from bottom to top, causes problems such as the further rising of catalyst top bed pressure drop; At this moment just need to stop work to change sediment incrustation basket, thereby can influence the normal operation of reaction unit.Except that above-mentioned hydrogenation reactor, the gas and liquid flowing fixed bed reactors of employed many other types of process such as benzene alkylation with propylene, toluene disproportionation and transalkylation, catalytic hydrogenation, fixed bed catalytic cracking in the technical field such as petroleum refining, organic chemical industry, the dirt depositional phenomenon of catalyst top bed is also all very general and serious; Use existing sediment incrustation basket to filter, exist similar problem.
Summary of the invention
The purpose of this invention is to provide a kind of filter plant that is used in the gas and liquid flowing fixed bed reactors, with solve existing be used for the existing installation of sediment incrustation basket in the gas and liquid flowing fixed bed reactors loaded down with trivial details, take the reactor useful space, can not on the horizontal cross-section of reactor, filter problems such as dirt, the incrustation capacity utilization ratio of liquid phase feeding is not high equably.
For addressing the above problem, the technical solution used in the present invention is: a kind of filter plant that is used in the gas and liquid flowing fixed bed reactors, it is characterized in that: it comprises that a horizontal cross sectional geometry is circular fixed disk frame and some lautertuns of being located in the fixed disk frame, lautertuns is symmetric arrangement on the diametric(al) of fixed disk frame horizontal cross-section, lautertuns is provided with bottom surface and the side that is made of net bar filter screen, the top is a hatch frame, net bar filter screen is fixed on the lautertuns framework, the lautertuns that is positioned at two ends is provided with two sides, one of them side is the arc surface adjacent with the fixed disk frame, another side is the plane, lautertuns between the lautertuns at two ends is provided with four sides, one of them side is the arc surface adjacent with the fixed disk frame, its excess-three side is the plane, have in three planar side one relative with the arc surface side, two other is perpendicular to the side relative with the arc surface side, leave strip crevice between the lautertuns, between the lautertuns, be connected by active connection between lautertuns and the fixed disk frame.
Be example below with the fixed bed hydrogenation reactor, illustrate and adopt the beneficial effect that the present invention had: the filter plant that (1) the present invention is used in the gas and liquid flowing fixed bed reactors is installed in the end socket at fixed bed hydrogenation reactor top in use, is positioned at the below of inlet diffuser, the top of gas-liquid distribution plate.Concrete installation process generally is earlier several backbars to be set in end socket, and the feed entrance on end socket is sent in the end socket with corrosion resistant metal rod member or corrosion resistant metal sheet then, is welded into the fixed disk frame above backbar, is supported on the backbar.Afterwards, each lautertuns of having made in feed entrance is sent into end socket, is interconnected each lautertuns, each lautertuns and fixed disk frame respectively with active connection (for example bolt and nut), be assembled into filter plant of the present invention.The filter plant that assembles is fastenedly connected with bolt and nut and backbar at last, promptly finishes the installation of filter plant.When reactor operation a period of time, the normal shut-down overhauled, can be by unclamping the bolt and nut of active connection and connection filter plant and backbar in end socket, the lautertuns that stops up is dismantled and take out, outside reactor, carry out scale removal, cleaning, perhaps change from feed entrance; Again lautertuns is sent in the end socket by feed entrance afterwards, be assembled into filter plant with the fixed disk frame again and come into operation.By above explanation as can be known, the installation of filter plant of the present invention, the maintenance all more convenient, structure is also comparatively simple.The lautertuns symmetric arrangement also is convenient to install; (2) there is very big space not use in the end socket at pre-existing reactors top; Filter plant of the present invention is installed in the end socket, has made full use of untapped space in the end socket, and does not take the useful space and the effective volume of reactor, can not reduce the reserve of catalyst; (3) filter plant is disc on the whole, and horizontal cross sectional geometry is identical with the reactor water plane section, and its diameter and area are close with the reactor water plane section, and lautertuns is a symmetric arrangement.So the everywhere position of filter plant on the reactor water plane section can both be filtered the dirt in the liquid phase feeding equably, filter area is big, filter efficiency height, effective; Its incrustation ability can be given full play to, and the incrustation capacity utilization ratio is higher; (4) adopt filter plant of the present invention, the upper surface of catalyst top bed still evenly lays porcelain ball bed routinely and lay the protective agent bed below porcelain ball bed, but sediment incrustation basket no longer is set.Liquid phase feeding mixes with gas-phase feed, enters reactor by feed entrance after heat exchange, heating, through the inlet diffuser diffusion, is filtered by filter plant again; Afterwards, liquid phase feeding and gas-phase feed are uniformly distributed on the reactor water plane section of below by the gas-liquid distribution plate, and arrive catalyst top bed with the path flow of identical length through porcelain ball bed and protective agent bed, evenly distribute on the bed of catalyst top; (5) during the filter plant normal filtration, do not need the porcelain ball bed of catalyst top bed upper surface and the protective agent bed below the porcelain ball bed to handle dirt.Filter plant is through turning round after a while, when lautertuns stops up fully, just losing filtration; This moment, catalyst top bed pressure drop did not raise, and reaction unit can continue to run well.Afterwards, the dirt in the liquid phase feeding is just tackled, is filtered by porcelain ball bed, and by the interception of protective agent bed, deposition.Thereby employing the present invention can significantly improve the service life of catalyst, can prolong the service cycle of reaction unit under the condition that does not increase catalyst top bed pressure drop greatly; (6) leave strip crevice between the lautertuns, the passage that flows downward as liquid phase feeding and gas-phase feed.Strip crevice also makes the voidage of filter plant bigger, thereby resistance is less, liquid phase feeding and gas-phase feed be easy to by, and through the uniform distribution of gas-liquid distribution plate, thereby make the pressure drop of beds less, help prolonging the service cycle of reaction unit.
The present invention is as a kind of novel reactor inner member, be specially adapted to fixed bed hydrogenation reactor, before liquid phase feeding enters beds, the dirt in the liquid phase feeding is tackled, filters, deposited, effectively slow down incrustation, the coking of catalyst top bed, eliminate by its variety of issue that causes.The present invention also is highly suitable for containing dirt in the liquid phase feeding of other type, making catalyst top bed have the gas and liquid flowing fixed bed reactors (as mentioned before) of incrustation problem, obtains similar beneficial effect.
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.The drawings and specific embodiments do not limit the scope of protection of present invention.
Description of drawings
Fig. 1 is the vertical view that the present invention is used for the filter plant in the gas and liquid flowing fixed bed reactors.
Fig. 2 is that the A of filter plant shown in Figure 1 is to view.
Fig. 3 is the perspective view of a lautertuns between the lautertuns at two ends in the filter plant of the present invention, is filled with protective agent in the lautertuns.
Among Fig. 1 to Fig. 3, same reference numerals is represented identical technical characterictic.
The specific embodiment
Referring to Fig. 1, Fig. 2, the present invention is used for the filter plant (abbreviating filter plant as) in the gas and liquid flowing fixed bed reactors, comprise that a horizontal cross sectional geometry is circular fixed disk frame 1 and some lautertuns 2 of being located in the fixed disk frame 1, lautertuns 2 is symmetric arrangement on the diametric(al) of fixed disk frame 1 horizontal cross-section.Fixed disk frame 1 can be the frame structure (as shown in Figure 1 and Figure 2) that is welded by several horizontal circle annulars and vertical corrosion resistant metal rod member, can also be columnar structured (figure slightly) that is welded by corrosion resistant metal sheet (arc surface shape).
Referring to Fig. 3 and Fig. 1, lautertuns 2 is provided with bottom surface and the side that is made of net bar filter screen 7, and the top is a hatch frame; The bottom surface is a planar shaped, and side and bottom surface are perpendicular.Net bar filter screen 7 is fixed on the lautertuns framework 6.Lautertuns framework 6 is welded by the corrosion resistant metal rod member, and net bar filter screen 7 generally is to be welded on the lautertuns framework 6.Net bar filter screen 7 is welded by the net bar that is arranged in parallel with perpendicular to the support bar of net bar, is commonly referred to as " Johnson's net "; See the introduction of " chemical industry equipment and pipeline " the 2nd phase in 2006 " application of homemade Johnson's net in fixed bed reactors " literary composition for details.The fixed disk frame 1 of lautertuns framework 6 and frame structure can be at level and several corrosion resistant metal rod members of the many welding of vertical direction, to gain in strength when size is big.
Referring to Fig. 1, the horizontal cross sectional geometry that is positioned at the lautertuns 2 at two ends is arc; It is provided with two sides, and one of them side is the arc surface adjacent with fixed disk frame 1, and another side is the plane.Referring to Fig. 1 and Fig. 3, the lautertuns 2 between the lautertuns 2 at two ends (abbreviating the intermediate filtered groove as) is provided with four sides, and one of them side is the arc surface adjacent with fixed disk frame 1, and its excess-three side is the plane; Have in three planar side one relative with the arc surface side, two other is perpendicular to the side relative with the arc surface side.Referring to Fig. 1, intermediate filtered groove 2 is divided into two row, symmetric arrangement on the diametric(al) of fixed disk frame 1 horizontal cross-section; The horizontal cross sectional geometry and the area of symmetrical a pair of lautertuns 2 are identical.As shown in Figure 1, the horizontal cross sectional geometry that is in a pair of lautertuns 2 of center is similar to rectangle, one side adjacent with fixed disk frame 1 be one section circular arc; The horizontal cross sectional geometry that is in the intermediate filtered groove 2 of other position is similar to right-angled trapezium, and the waist adjacent with fixed disk frame 1 is one section circular arc.
Leave strip crevice 4 between the lautertuns 2.Referring to Fig. 1, form strip crevice 4 between adjacent two planar side of each lautertuns 2.During reactor operation, the passage that strip crevice 4 flows downward as liquid phase feeding and gas-phase feed.Between the lautertuns 2, be connected by active connection 3 between lautertuns 2 and the fixed disk frame 1.Active connection 3 is meant the connector of being convenient to mount and dismount commonly used, for example bolt and nut (preferred, shown in the accompanying drawing), pin etc.Be on lautertuns framework 6, to connect between the lautertuns 2.Between lautertuns 2 and the fixed disk frame 1, when fixed disk frame 1 is frame structure, on the corrosion resistant metal rod member of lautertuns framework 6 and fixed disk frame 1, be connected; When fixed disk frame 1 is columnar structured, on the barrel of lautertuns framework 6 and fixed disk frame 1, be connected.
Referring to Fig. 1 to Fig. 3, the major parameter of filter plant of the present invention is generally as follows: the bar seam width in the net bar filter screen 7 between the net bar is 20～100 μ m.Lautertuns 2 is provided with 10～30, and concrete quantity is mainly determined according to the diameter of reactor.The height H of lautertuns 2 is 10～50cm, and width w is 10～80cm.For horizontal cross sectional geometry was arc lautertuns 2, width w was meant arc height.The height H of lautertuns 2, width w press the external dimensions of lautertuns 2 and calculate.The width of strip crevice 4 is 5～20cm between the lautertuns 2.
Preferred parameter is as follows: lautertuns 2 is provided with 10～20, and the height H of lautertuns 2 is 15～30cm.
The height H generally identical (referring to Fig. 2) of the height of fixed disk frame 1 and lautertuns 2 also can be omited height.The diameter of fixed disk frame 1 is the diameter that the present invention is discoidal filter plant, with the diameter close (being slightly less than the diameter of reactor water plane section) of reactor water plane section.
Referring to Fig. 1, Fig. 2, can leave annulus 5 between lautertuns 2 and the fixed disk frame 1, the same passage that flows downward as liquid phase feeding and gas-phase feed with strip crevice 4.Referring to Fig. 1, form annulus 5 between the arc surface side of each lautertuns 2 and the fixed disk frame 1, its horizontal cross sectional geometry is an annular.The width of annulus 5 is generally less than and equals 20cm.When reactor diameter was frame structure less than 150cm and fixed disk frame 1, the width of annulus 5 can be 0, be actually this moment lautertuns 2 and fixed disk frame 1 between do not stay annulus 5.
For fixed bed hydrogenation reactor, liquid phase feeding carries out mechanical filter before entering reactor, except that the whole mechanical admixtures that can not remove wherein, and some solubility dirts, for example big molecule colloid, carbon residue, iron naphthenate etc. can not filter out.These solubility dirts just can produce scale forming matter in course of reaction.Normally below the porcelain ball bed of catalyst top bed upper surface, lay the protective agent bed; to the solubility dirt in the liquid phase feeding adsorb, remove (porcelain ball bed is mainly used in interception, filter and the deposition liquid phase feeding in insoluble mechanical admixture class dirt, the residue mechanical admixture that do not fallen by porcelain ball bed filtration in the liquid phase feeding also can be tackled, be filtered, deposit to the protective agent bed).Along with the prolongation of the duration of runs, the dirt that protective agent is adsorbed, deposits loses protective effect after stopping up; Solubility dirt in the liquid phase feeding enters catalyst top bed and produce scale forming matter in course of reaction; flowing through with liquid phase feeding, remaining mechanical admixture begins to deposit in the bed of catalyst top gradually behind porcelain ball bed and the protective agent bed, causes that beds stops up, problems such as pressure drop rising and catalyst activity reduction.Along with the continuous increase of acid-containing raw oil processing capacity in recent years, it is more outstanding that this problem seems.For this reason; can in the lautertuns 2 of filter plant of the present invention, load protective agent 8; before liquid phase feeding flows into porcelain ball bed and protective agent bed, its contained solubility dirt is once adsorbed, removes, also tackle, deposit simultaneously the mechanical admixture in the liquid phase feeding.According to the kind of solubility dirt in the liquid phase feeding, protective agent 8 can be adsorbent, take off charcoal agent or deferrization agent etc.The composition of protective agent 8 and all be conventional at the selection of different solubility dirts; For example, for big molecule colloid, carbon residue, iron naphthenate, protective agent 8 correspondingly adopts adsorbent respectively, takes off charcoal agent, deferrization agent.Referring to Fig. 3, the loading height h of protective agent 8 is generally 10%～50% of lautertuns 2 height H.
The various parameters of relevant filter plant of the present invention can be according to the dirt kind in reactor scale and actual condition, liquid phase feeding character and the liquid phase feeding, content etc., carries out simple designing and calculating and determine by the conventional knowledge of this area.
Filter plant of the present invention normally is installed in the end socket at gas and liquid flowing fixed bed reactors top.For fixed bed hydrogenation reactor, filter plant is installed in the end socket of reactor head, is positioned at the below of inlet diffuser, the top of gas-liquid distribution plate; The below of gas-liquid distribution plate is followed successively by porcelain ball bed, protective agent bed, catalyst top bed from top to bottom.Concrete installation process, generally be earlier several backbars to be set in end socket (backbar generally adopts I-steel, send into by the feed entrance on the end socket, two ends are welded in the end socket inwall), feed entrance on end socket is sent into (this moment, feed entrance was not installed inlet diffuser as yet) in the end socket with corrosion resistant metal rod member or corrosion resistant metal sheet (arc surface shape) then, above backbar, be welded into frame structure or columnar structured fixed disk frame 1, be supported on the backbar.Afterwards, with each lautertuns 2 of having made in feed entrance is sent into end socket, place fixed disk frame 1 and be supported on the backbar, symmetric arrangement on the diametric(al) of fixed disk frame 1 horizontal cross-section, use active connection 3 (for example bolt and nut) respectively each lautertuns 2, each lautertuns 2 to be interconnected with fixed disk frame 1 again, be assembled into filter plant of the present invention.Can be after lautertuns 2 all arranges connect with active connection 3 again, while also can arrange lautertuns 2, use active connection 3 connections.The filter plant that assembles is fastenedly connected (contact position that connecting portion is generally each lautertuns framework 6 and backbar) with bolt and nut and backbar at last, promptly finishes the installation of filter plant.
When reactor operation a period of time, the normal shut-down overhauled, can be by unclamping the bolt and nut of active connection 3 and connection filter plant and backbar in end socket, the lautertuns 2 that stops up is dismantled and take out, outside reactor, carry out scale removal, cleaning, perhaps change from feed entrance; Again lautertuns 2 is sent in the end socket by feed entrance afterwards, be assembled into filter plant with fixed disk frame 1 again and come into operation.
When needing to load protective agent 8 in the lautertuns 2, equipment normally to be filtered recharges after assembling in end socket and finishing.
Fixed bed hydrogenation reactor adopts filter plant of the present invention; the upper surface of catalyst top bed still evenly lays porcelain ball bed routinely and lay protective agent bed (porcelain ball and protective agent all are conventional) below porcelain ball bed; but sediment incrustation basket no longer is set, does not in addition have other structural variation.During reactor operation, replace sediment incrustation basket to filter with filter plant of the present invention, all the other operating procedures and operating condition are constant substantially.
The material of each parts of filter plant of the present invention comprises and the material of the backbar that is used for supporting filter equipment all adopts corrosion resistant metal, for example stainless steel.
Below in conjunction with accompanying drawing, with the fixed bed hydrogenation reactor that is used for hydrocarbon raw material is the filter process of example explanation filter plant of the present invention.First kind of situation, the solubility dirt content in the liquid phase feeding is lower, needn't consider; Do not load protective agent in the lautertuns 2 of filter plant.Enter carry out mechanical filter before the reactor, residue has the liquid phase feeding of part mechanical admixture to mix with gas-phase feed, enters reactor through heat exchange, after heating by the feed entrance on the end socket, be diffused on the filter plant of the present invention through inlet diffuser.Gas-phase feed is carried very a spot of liquid phase feeding and is passed through from the annulus 5 between the strip crevice 4 between the lautertuns 2 and lautertuns 2 and the fixed disk frame 1, flows to the gas-liquid distribution plate that is positioned at the filter plant below.The liquid phase feeding of the overwhelming majority is entered in the lautertuns 2 by the opening at lautertuns 2 tops, tackle, filter, deposit by the dirt (mechanical admixture) in 7 pairs of liquid phase feedings of net bar filter screen of lautertuns 2 bottom surfaces and bottom, side, liquid phase feeding flows out from the seam of the bar between the net bar filter screen 7 net bars afterwards, flows downward to the gas-liquid distribution plate; The gas-liquid distribution plate is uniformly distributed to liquid phase feeding (and gas-phase feed) on the reactor water plane section of below.Flow through downwards again porcelain ball bed and protective agent bed of liquid phase feeding and gas-phase feed arrives catalyst top bed.Along with the prolongation of the duration of runs, dirt is deposition in lautertuns 2 gradually, and the net bar filter screen 7 of lautertuns 2 bottom surfaces and bottom, side stops up, and the liquid level in the lautertuns 2 rises; Liquid phase feeding is filtered by top, lautertuns 2 side unplugged net bar filter screen 7, flows out from the seam of the bar between this part net bar filter screen 7 net bar afterwards, flows downward to the gas-liquid distribution plate through strip crevice 4 and annulus 5.
Second kind of situation, the solubility dirt content in the liquid phase feeding is higher, is filled with protective agent 8 (referring to Fig. 3) in the lautertuns 2 of filter plant at this moment.Entering the liquid phase feeding that carries out mechanical filter, residue before the reactor and the part mechanical admixture is arranged and contain high-load solubility dirt mixes with gas-phase feed, after heat exchange, heating, enter reactor, be diffused on the filter plant of the present invention through inlet diffuser by the feed entrance on the end socket.Gas-phase feed is carried very a spot of liquid phase feeding and is passed through from the annulus 5 between the strip crevice 4 between the lautertuns 2 and lautertuns 2 and the fixed disk frame 1, flows to the gas-liquid distribution plate that is positioned at the filter plant below.The liquid phase feeding of the overwhelming majority is entered in the lautertuns 2 by the opening at lautertuns 2 tops, the solubility dirt in the liquid phase feeding is adsorbed, removes by physics-chemical action by protective agent 8, and tackle, deposit the mechanical admixture in the liquid phase feeding.Afterwards, a part of liquid phase feeding flows out from the seam of the bar between the net bar of the net bar filter screen 7 of lautertuns 2 bottom surfaces, flows downward to the gas-liquid distribution plate; Another part liquid phase feeding flows out from the bar seam between the net bar of the net bar filter screen 7 of lautertuns 2 sides that contact with protective agent 8, flows downward to the gas-liquid distribution plate through strip crevice 4 and annulus 5.Prolongation along with the duration of runs; after the dirt that protective agent 8 is adsorbed, deposits stops up; liquid phase feeding is filtered by the net bar filter screen 7 of protective agent 8 tops, lautertuns 2 sides that do not contact with protective agent 8; flow out from the seam of the bar between this part net bar filter screen 7 net bar afterwards, flow downward to the gas-liquid distribution plate through strip crevice 4 and annulus 5.This moment, lautertuns 2 only can filter out the mechanical admixture in the liquid phase feeding, can not adsorb, remove the solubility dirt.Along with the gas-liquid distribution plate liquid phase feeding (and gas-phase feed) is dispensed on the reactor water plane section of below, liquid phase feeding and gas-phase feed continue to flow through porcelain ball bed and protective agent bed arrival catalyst top bed downwards; solubility dirt in the liquid phase feeding begins to be adsorbed, removed by the protective agent bed, and therefore the reaction of catalyst top bed and operation are not affected.
For the filter process of above-mentioned two kinds of situations, along with the continuation prolongation of the duration of runs and the continuation of dirt deposition process, lautertuns 2 stops up fully, and filter plant loses filtration.Liquid phase feeding overflows from the edge at lautertuns 2 tops, flows downward to the gas-liquid distribution plate through strip crevice 4 and annulus 5, is dispensed on the reactor water plane section of below by the gas-liquid distribution plate with gas-phase feed; Liquid phase feeding and gas-phase feed continue to flow through downwards porcelain ball bed and protective agent bed arrives catalyst top bed afterwards.In this process, the mechanical admixture class dirt in the liquid phase feeding begins to be tackled, filter and deposited by porcelain ball bed, and the protective agent bed that the solubility dirt in the liquid phase feeding then continues below porcelain ball bed adsorbs, removes.The residue mechanical admixture that do not fallen by porcelain ball bed filtration in the liquid phase feeding can also be tackled, be filtered, deposit to the protective agent bed.Stop up fully at the dirt that porcelain ball bed and protective agent bed are deposited, ineffective before, catalyst top bed can both well be protected all the time, its pressure drop can not raise.
In above-mentioned filter process, when not staying annulus 5 between lautertuns 2 and the fixed disk frame 1, gas-phase feed and liquid phase feeding only from the strip crevice 4 between the lautertuns 2 by, flow downward.
By above explanation as can be known, filter plant of the present invention is after lautertuns 2 stops up fully, gas-phase feed and liquid phase feeding can flow downward by strip crevice 4 and annulus 5 (if leaving annulus 5), thereby can not influence the normal operation of reaction unit.During the normal shut-down (breakdown) mainteance of reactor, lautertuns 2 can be taken out in the reactor and carry out scale removal, cleaning, perhaps change; See the explanation that this specification filter plant is installed, overhauled part for details.When needing to load protective agent in the lautertuns 2, when maintenance, load new protective agent again.
Above specific embodiment part is that example describes the present invention to be applied to hydrogenation reactor.For the gas and liquid flowing fixed bed reactors of other type, can be according to filter plant of the present invention being set and carrying out corresponding various operation with the essentially identical principle of above-mentioned hydrogenation reactor.
Claims (5)
1. one kind is used for the interior filter plant of gas and liquid flowing fixed bed reactors, it is characterized in that: it comprises that a horizontal cross sectional geometry is circular fixed disk frame (1) and is located at the interior some lautertuns (2) of fixed disk frame (1), lautertuns (2) is symmetric arrangement on the diametric(al) of fixed disk frame (1) horizontal cross-section, lautertuns (2) is provided with bottom surface and the side that is made of net bar filter screen (7), the top is a hatch frame, net bar filter screen (7) is fixed on the lautertuns framework (6), the lautertuns (2) that is positioned at two ends is provided with two sides, one of them side is and the adjacent arc surface of fixed disk frame (1), another side is the plane, the lautertuns (2) that is positioned between the lautertuns (2) at two ends is provided with four sides, one of them side is and the adjacent arc surface of fixed disk frame (1), its excess-three side is the plane, have in three planar side one relative with the arc surface side, two other is perpendicular to the side relative with the arc surface side, leave strip crevice (4) between the lautertuns (2), between the lautertuns (2), be connected by active connection (3) between lautertuns (2) and the fixed disk frame (1), bar seam width in the described net bar filter screen (7) between the net bar is 20～100 μ m, lautertuns (2) is provided with 10～30, the height of lautertuns (2) is 10～50cm, width is 10～80cm, and the width of strip crevice (4) is 5～20cm between the lautertuns (2).
2. filter plant according to claim 1 is characterized in that: lautertuns (2) is provided with 10～20, and the height of lautertuns (2) is 15～30cm.
3. filter plant according to claim 1 is characterized in that: leave annulus (5) between lautertuns (2) and the fixed disk frame (1), the width of annulus (5) is smaller or equal to 20cm.
4. according to any one described filter plant in the claim 1 to 3, it is characterized in that: be filled with protective agent (8) in the lautertuns (2), protective agent (8) is adsorbent, takes off charcoal agent or deferrization agent.
5. filter plant according to claim 4 is characterized in that: the loading height of protective agent (8) is 10%～50% of lautertuns (a 2) height.
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| CN2008100498613A CN101279226B (en) | 2008-05-23 | 2008-05-23 | Filter device in gas-liquid co-current flow fixed bed reactor |
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| CN2008100498613A CN101279226B (en) | 2008-05-23 | 2008-05-23 | Filter device in gas-liquid co-current flow fixed bed reactor |
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| CN101279226B true CN101279226B (en) | 2011-02-09 |
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| 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 |
| US11298669B2 (en) | 2017-12-21 | 2022-04-12 | Uop Llc | Scale collection device for downflow reactors |
| US11224849B2 (en) | 2017-12-21 | 2022-01-18 | Uop Llc | Scale collection device for downflow reactors |
| CN117255713A (en) * | 2021-04-21 | 2023-12-19 | 雪佛龙美国公司 | Filter device for downflow hydroprocessing reactor |
| CN114588852A (en) * | 2022-03-14 | 2022-06-07 | 中国石油化工股份有限公司 | Double support structure and reactor for installation in the reactor head |
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