CN102927299A - Special material regulating angle valve for high-pressure hydrogenation reaction - Google Patents
Special material regulating angle valve for high-pressure hydrogenation reaction Download PDFInfo
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- CN102927299A CN102927299A CN2012104607300A CN201210460730A CN102927299A CN 102927299 A CN102927299 A CN 102927299A CN 2012104607300 A CN2012104607300 A CN 2012104607300A CN 201210460730 A CN201210460730 A CN 201210460730A CN 102927299 A CN102927299 A CN 102927299A
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Abstract
The invention relates to a special material regulating angle valve for a high-pressure hydrogenation reaction. A valve seat is fixed on a valve body, a valve rod is spliced in the valve body in a sealing and sliding manner, a valve core is in integrated connection with the bottom end part of the valve rod, an auxiliary guide seat is mounted between the valve body and the valve seat, an anti-erosion sleeve is mounted on the auxiliary guide seat, one end of the anti-erosion sleeve is embedded into the auxiliary guide seat, the other end of the anti-erosion sleeve is embedded into the valve body, and the valve rod is spliced in the anti-erosion sleeve in a sliding manner. With the adoption of the special material regulating angle valve, the accumulation of a medium on an inner wall is prevented, the erosion of the high speed medium to internal pieces of the valve is reduced, the valve rod is not blocked by the granular medium, the service life of the valve rod is prolonged, and the stability and reliability of the auxiliary guide seat are ensured.
Description
Technical field
The present invention relates to a kind of adjusting angle valve, especially a kind of high-pressure hydrogenation reacts special material and regulates angle valve.
Background technique
Hydrogenator is the major component of PTA device of refining unit, TA slurry and hydrogen carry out chemical reaction under the pressure of 315 ℃ temperature, 8.5MPa in the reactor, make intermediate product 4-CBA further generate PT acid, reacted high temperature, high-pressure process slurry enter down-technological process through overregulating angle valve.
We know, when pressure is that the liquid medium of P1 is when flowing through the modulating valve throttle orifice, flow velocity increases, and static pressure descends, when the pressure P 2 behind the modulating valve throttle orifice is equal to or less than saturation vapour pressure Pv under this liquid medium place operating mode, the partially liq medium will be vaporized into gas, forms the phenomenon of gas-liquid two-phase coexistence, and this phenomenon is called flash distillation.When producing flash distillation, liquid medium can produce erosion to trims such as the spool of modulating valve, valve seats, and affects the negotiability of valve.If after the generation flash distillation, P2 remains on below the saturation vapour pressure Pv, but suddenly rises again after the modulating valve throttle orifice, and the bubble that flash distillation this moment produces can break and be converted into liquid state, and this process is exactly cavitation.When producing cavitation, because pressure rise behind the modulating valve throttle orifice, in succession explosion of the bubble that produces during flash distillation, all concentration of energy that explosion produces are on breakdown point, form great impact force, if this explosion occurs near the solid surface behind the modulating valve throttle orifice, impact force can slowly be torn material surface.
The discharging of PTA device hydrogenator is regulated angle valve downstream pressure P2 less than the saturation vapour pressure Pv of medium under this operating mode, so medium can not produce cavitation under this operating mode, only flash distillation can occur.And because adjusting angle valve downstream pressure P2 is the downstream pressure of valve, it is a function of downstream process and pipeline, saturation vapour pressure Pv is a function of fluid and operating temperature, so flash distillation is inevitably, must avoid or reduce as far as possible destroying by selecting suitable geometrical shape and material.
Hydrogen is not Korrosionsmedium, can not produce significantly corrosion to steel at normal temperatures and pressures.But under high temperature and high pressure condition, it has very strong penetrating power.Because hydrogen molecule is very little, the hydrogen of High Temperature High Pressure enters the lattice the inside of metal, produce very high pressure, can cause metal surface bulge or fold when serious, make metal surface bubbling (being called " hydrogen embrittlement "), cause material plasticity and strength decreased, and the cracking that therefore causes or the brittle failure of retardance.Temperature is higher, the hydrogen dividing potential drop is more outstanding, and the hydrogen embrittlement layer is just darker, and the time that the generation hydrogen embrittlement breaks is also shorter.The carbon content of metallic material is higher, and under identical temperature and pressure condition, the tendency of hydrogen embrittlement is more serious.In hydrogenator, because being arranged, hydrogen participates in reaction, hydrogen partial enters down-technological process through overregulating angle valve with reacted high temperature, high-pressure process slurry, and in this process, hydrogen has certain " corrosion " effect (Hydrogen Brittleness Phenomena) to valve body and trim material.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of and can guarantee that hydrogenator operation steady in a long-term, extension fixture repair cycle, the high-pressure hydrogenation of increasing work efficiency react special material adjusting angle valve.
According to technological scheme provided by the invention, described high-pressure hydrogenation reacts special material and regulates angle valve, comprise valve body, valve seat, valve rod and spool, be fixed with valve seat at valve body, slipper seal is plugged with valve rod in valve body, be connected with described spool in the bottom of valve rod, auxiliary guide holder is installed between valve body and valve seat, at described auxiliary guide holder the protection against erosion sleeve pipe is installed, one end of protection against erosion sleeve pipe embeds in the auxiliary guide holder, the other end of protection against erosion sleeve pipe embeds in the valve body, and described valve stem slides is plugged in the protection against erosion sleeve pipe.
Be provided with two rinse mouths in the valve body outside, one of them rinse mouth is arranged on the valve body outside of import right opposite, becomes 90 ° with valve body import medial axis; Another rinse mouth is arranged on the valve body neck, and perpendicular to the medial axis of valve rod, and this rinse mouth becomes 90 ° with the projection line of valve body import medial axis on the end of valve body flanged surface.
Described valve body import medial axis becomes 135 ° with the outlet medial axis, is provided with guide plate at described valve inner, and described guide plate is separately positioned on the inwall left and right sides of valve body import right opposite, becomes 90 ° of angles symmetrical.
Be connected with guide vane at described spool, the outer side wall of guide vane cooperates with the inner circle sidewall of valve seat.
Be fixed with support at valve body, be bolted with spacing adjustment piece at support, be fixed with protecting cover in spacing adjustment piece, described valve stem slides is plugged in the protecting cover.
Offer the oiling interface at valve body.
Compared with the prior art the present invention has the following advantages:
1, valve body adopts 135 ° of import and export mixes, and it is streamlined that the valve inner runner more is tending towards, and elimination valve flowing channel dead band guarantees that media flow is unobstructed, prevents that medium from piling up at inwall, affects the valve negotiability;
2, body cavity guide plate design has reduced the high speed medium at the eddy-currents that valve inner produces, and has avoided as far as possible flash distillation, and because the shunting action of guide plate has reduced high speed medium washing away trim;
3, the flushing mechanism of valve body design, wherein the rinse mouth of valve body import right opposite valve body outside can utilize the high pressure water circulatory system regularly body cavity to be washed by it, guarantees that body cavity and valve base cavity be not by filter medium clogging; And the rinse mouth of valve body neck can wash the gap of valve rod and protection against erosion sleeve pipe, can guarantee that valve rod is not by the granule medium blocking;
4, design filler spacer in the middle of double-deck filler group, and design oil hole at valve body, can meet IEC standard lubricant grease by the oil gun filling in the cycle at certain intervals, valve rod and filler are lubricated, prolonged the working life of filler, reduce the thrust output requirement to actuator, increased the degree of regulation of valve;
5, the Combination Design of auxiliary guide holder and protection against erosion sleeve pipe has increased the stability of valve rod, has protected valve rod, avoids the high speed medium to directly the washing away of valve rod, and has prolonged the working life of valve rod;
6, valve seat and auxiliary guide holder draw-in groove mounting design not only have positioning action to auxiliary guide holder, also have the anti-rotation effect, guarantee that auxiliary guide holder is reliable and stable;
7, rack beam structural design, for the spacing adjusting of aperture of regulating angle valve provides reliable support, by this structure, what spacing adjustment piece can be effective and safe carries out spacing adjusting in the valve body outside to valve opening, satisfies the control requirement of valve;
8, mangetic core assembly integral design, guide vane on the spool and spool, valve rod integral body process, and avoid using welding technique, Effective Raise the tensile strength of valve rod, avoided the weld joint crack to occur, the local decay resistance of also having avoided welding to cause reduces.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the A-A partial sectional view of Fig. 1.
Fig. 3 is the B-B partial sectional view of Fig. 1.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
As shown in the figure, this high-pressure hydrogenation reacts special material and regulates angle valve, comprise valve body 1, valve seat 2, valve rod 3 and spool 4, be fixed with valve seat 2 at valve body 1, be plugged with valve rod 3 in valve body 1 interior slipper seal, be connected with described spool 4 in the bottom of valve rod 3, auxiliary guide holder 5 is installed between valve body 1 and valve seat 2, at described auxiliary guide holder 5 protection against erosion sleeve pipe 6 is installed, one end of protection against erosion sleeve pipe 6 embeds in the auxiliary guide holder 5, the other end of protection against erosion sleeve pipe 6 embeds in the valve body 1, and described valve rod 3 sliding plugs are in protection against erosion sleeve pipe 6.
Be provided with two rinse mouths 7 in the valve body outside, one of them rinse mouth 7 is arranged on valve body 1 outside of import right opposite, becomes 90 ° with valve body 1 import medial axis; Another rinse mouth 7 is arranged on valve body 1 neck, and perpendicular to the medial axis of valve rod 3, and this rinse mouth 7 becomes 90 ° with the projection line of valve body 1 import medial axis on the end of valve body flanged surface.
Described valve body 1 import medial axis becomes 135 ° with the outlet medial axis, is provided with guide plate 8 in described valve body 1 inside, and described guide plate 8 is separately positioned on the inwall left and right sides of valve body 1 import right opposite, becomes 90 ° of angles symmetrical.
Be connected with guide vane 9 at described spool 4, the outer side wall of guide vane 9 cooperates with the inner circle sidewall of valve seat 2.
Be fixed with support 10 at valve body 1, be bolted with spacing adjustment piece 11 at support 10, be fixed with protecting cover 12 in spacing adjustment piece 11, described valve rod 3 sliding plugs are in protecting cover 12; Described spacing adjustment piece 11 can be adjusted up and down on the short transverse of support 10.Described spacing adjustment piece 11 interior installation protecting covers 12, and fix with circlip, described protecting cover 12 adopts the teflon material, and keep gaps with valve rod 3, avoid valve rod 3 to contact with spacing adjustment piece 11, guarantee the roughness on valve rod 3 surfaces, valve rod 3 upper ends adopt stop nut, thin nut double nut to fix, described stop nut is special, guarantees spacing validity.
Valve body 1 adopts A494 CW2M, takes full advantage of the decay resistance of Ni-Cr-Mo-W alloy in the oxidation-reduction quality medium, and good machining, welding performance, has guaranteed long-term normal use of valve body 1 in High Temperature High Pressure and Korrosionsmedium situation;
Trim adopts B348 Gr.5, take full advantage of the good usability of B348 Gr.5 under " hydrogen embrittlement " phenomenon, and process by nitriding, nitrided case depth is 0.15～0.2mm, nitriding layer hardness is HV800～1000, improve surface hardness, the wear resistance of the main trims such as spool 4, valve rod 3, guide vane 9, valve seat 2, auxiliary guide holder 5, protection against erosion sleeve pipe 6, strengthened erosion resistibility.
Up and down two gasket seals are installed in auxiliary guide holder 5, the filler group is installed between two gasket seals; The bottom of described protection against erosion sleeve pipe 6 offsets with the gasket seal that is positioned at the top.
Working principle of the present invention is as follows:
The high temperature that hydrogenator produces, high-pressure process slurry medium by relatively moving to the control of rate-of flow of mangetic core assembly and valve seat 2, reach the flow that satisfies technique from regulating angle valve entrance entering angle valve body 1 inner chamber, finally enter next technological process.
The present invention adopts 135 ° of angle valve valve body 1 to import and export and internal diversion plate 8 structures, eliminates the dead band of valve flowing channel, reduces the eddy-currents that the high speed medium produces at the angle valve valve inner, the washout valve internals.
The present invention adopts multidimensional runner flushing mechanism, utilize the rinse mouth 7 of angle valve valve body 1 outside, diagonal angle valve body inner chamber washes, prevent that medium from piling up at inwall, affect the valve negotiability, utilize the rinse mouth 7 of angle valve valve body 2 necks, valve rod 3 and the gap of protection against erosion sleeve pipe 6 are washed, can guarantee that valve rod 3 is not by the granule medium blocking.
The present invention assists the structural design of guide holder 5 and protection against erosion sleeve pipe 6, has increased the stability of valve rod 3, has protected valve rod 3, avoids high speed medium directly washing away valve rod 3.
The double-deck filler group design of valve body 1 interior employing of the present invention, in the middle of the filler group, increase the filler spacer, and at angle valve valve body 1 design oiling interface 13, by oiling interface 13 charging-up lubricant oil fat, valve rod 3 and filler group are lubricated, prolong the working life of filler group, reduced the thrust output requirement to actuator, increased the degree of regulation of valve.
The beam structure design of support 10 of the present invention has solved the requirement to the spacing adjusting of valve opening in angle valve valve body 1 outside, satisfies the control requirement of valve.
Mangetic core assembly integral design of the present invention, guide vane 9 processes with spool 4, valve rod 3 integral body, does not use welding technique, Effective Raise the tensile strength of mangetic core assembly, avoided the weld joint crack to occur, the local decay resistance of also having avoided welding to cause reduces.
Angle valve valve body 1 of the present invention adopts A494 CW2M, take full advantage of the decay resistance of Ni-Cr-Mo-W alloy in the oxidation-reduction quality medium, and good machining, welding performance, guaranteed long-term normal use of angle valve valve body 1 in High Temperature High Pressure and Korrosionsmedium situation.
Trim of the present invention adopts B348 Gr.5, take full advantage of the good usability of B348 Gr.5 under " hydrogen embrittlement " phenomenon, and process by nitriding, improve surface hardness, the wear resistance of the main trims such as mangetic core assembly, valve seat 2, auxiliary guide holder 5, protection against erosion sleeve pipe 6, strengthen erosion resistibility.
Claims (6)
1. a high-pressure hydrogenation reacts special material adjusting angle valve, comprise valve body (1), valve seat (2), valve rod (3) and spool (4), be fixed with valve seat (2) at valve body (1), slipper seal is plugged with valve rod (3) in valve body (1), be connected with described spool (4) in the bottom of valve rod (3), it is characterized in that: between valve body (1) and valve seat (2), auxiliary guide holder (5) is installed, at described auxiliary guide holder (5) protection against erosion sleeve pipe (6) is installed, one end of protection against erosion sleeve pipe (6) embeds in the auxiliary guide holder (5), the other end of protection against erosion sleeve pipe (6) embeds in the valve body (1), and described valve rod (3) sliding plug is in protection against erosion sleeve pipe (6).
2. high-pressure hydrogenation as claimed in claim 1 reacts special material adjusting angle valve, it is characterized in that: be provided with two rinse mouths (7) in the valve body outside, one of them rinse mouth (7) is arranged on valve body (1) outside of import right opposite, becomes 90 ° with valve body (1) import medial axis; Another rinse mouth (7) is arranged on valve body (1) neck, and perpendicular to the medial axis of valve rod (3), and this rinse mouth (7) becomes 90 ° with the projection line of valve body (1) import medial axis on the end of valve body flanged surface.
3. high-pressure hydrogenation as claimed in claim 1 or 2 reacts special material adjusting angle valve, it is characterized in that: described valve body (1) import medial axis becomes 135 ° with the outlet medial axis, be provided with guide plate (8) in described valve body (1) inside, described guide plate (8) is separately positioned on the inwall left and right sides of valve body (1) import right opposite, becomes 90 ° of angles symmetrical.
4. high-pressure hydrogenation as claimed in claim 1 reacts special material adjusting angle valve, and it is characterized in that: be connected with guide vane (9) at described spool (4), the outer side wall of guide vane (9) cooperates with the inner circle sidewall of valve seat (2).
5. high-pressure hydrogenation as claimed in claim 1 reacts special material adjusting angle valve, it is characterized in that: be fixed with support (10) at valve body (1), be fixed with spacing adjustment piece (11) at support (10), be fixed with protecting cover (12) in spacing adjustment piece (11), described valve rod (3) sliding plug is in protecting cover (12).
6. high-pressure hydrogenation as claimed in claim 1 reacts special material adjusting angle valve, it is characterized in that: offer oiling interface (13) at valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104607300A CN102927299A (en) | 2012-11-15 | 2012-11-15 | Special material regulating angle valve for high-pressure hydrogenation reaction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104607300A CN102927299A (en) | 2012-11-15 | 2012-11-15 | Special material regulating angle valve for high-pressure hydrogenation reaction |
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| CN102927299A true CN102927299A (en) | 2013-02-13 |
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| CN2012104607300A Pending CN102927299A (en) | 2012-11-15 | 2012-11-15 | Special material regulating angle valve for high-pressure hydrogenation reaction |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633136A (en) * | 2015-02-10 | 2015-05-20 | 无锡智能自控工程股份有限公司 | Automatic cleaning and coating angle valve |
| CN108167463A (en) * | 2018-02-12 | 2018-06-15 | 无锡智能自控工程股份有限公司 | Split type interior exhibition switch corner valve |
| CN108317297A (en) * | 2017-12-19 | 2018-07-24 | 天津智源机械制造股份有限公司 | A kind of energy saving flow valve |
| CN108692043A (en) * | 2018-07-03 | 2018-10-23 | 郑州市新玉源机械工业有限公司 | The throttle structure of spool and the use spool, plunger type adjust angle valve |
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| CN102654199A (en) * | 2012-04-19 | 2012-09-05 | 吴忠仪表有限责任公司 | Novel black water angle valve |
| CN202927071U (en) * | 2012-11-15 | 2013-05-08 | 无锡智能自控工程股份有限公司 | Special-material adjusting angle valve for high-pressure hydrogenation reaction |
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| CN2818947Y (en) * | 2005-08-25 | 2006-09-20 | 张珉 | Safety angular valve of gas steel bottle |
| CN2861636Y (en) * | 2005-10-24 | 2007-01-24 | 河南省中原大化集团有限责任公司 | Angular form control valve |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633136A (en) * | 2015-02-10 | 2015-05-20 | 无锡智能自控工程股份有限公司 | Automatic cleaning and coating angle valve |
| CN108317297A (en) * | 2017-12-19 | 2018-07-24 | 天津智源机械制造股份有限公司 | A kind of energy saving flow valve |
| CN108317297B (en) * | 2017-12-19 | 2023-06-16 | 天津智源机械制造股份有限公司 | Energy-saving flow valve |
| CN108167463A (en) * | 2018-02-12 | 2018-06-15 | 无锡智能自控工程股份有限公司 | Split type interior exhibition switch corner valve |
| CN108692043A (en) * | 2018-07-03 | 2018-10-23 | 郑州市新玉源机械工业有限公司 | The throttle structure of spool and the use spool, plunger type adjust angle valve |
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Application publication date: 20130213 |