CN104848036A - System for continuously decompressing high pressure fluid containing solid particles - Google Patents
System for continuously decompressing high pressure fluid containing solid particles Download PDFInfo
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- CN104848036A CN104848036A CN201510246211.8A CN201510246211A CN104848036A CN 104848036 A CN104848036 A CN 104848036A CN 201510246211 A CN201510246211 A CN 201510246211A CN 104848036 A CN104848036 A CN 104848036A
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Abstract
The invention discloses a system for continuously decompressing high pressure fluid containing solid particles and is characterized by being formed by connecting two or more than two decompression parts in series, and the adjacent decompression parts are communicated through a pipeline. Each decompression part is of a cylindrical structure, a channel is axially formed in the decompression part, and the channel is divided into five sections including an inlet end straight pipe section, a reducing section, a throat section, a gradual expansion section and an outlet end straight pipe section. The throat section is symmetrical in front-back structure, and the inner diameters of the inlet end straight pipe section and the outlet end straight pipe section are both consistent with the inner diameter of the pipeline. The system has the advantage that high pressure fluid containing solid particles can be subjected to continuous decompression by combining the plurality of identical decompression parts, and the pressure of dozens of kilos even higher is reduced to low pressure of several kilos or normal pressure. The whole system is not provided with a valve periodically impacted by high pressure fluid containing solid particles and abraded by the solid particles in the fluid, maintenance cost is reduced, and the system can operate stably for a long term.
Description
Technical field
The present invention relates to a kind of pressure relief system, be specifically related to a kind of system for carrying out continuous pressure release to the high-pressure liquid containing solid particle, belong to pressure relief equipment technical field.
Background technique
Lock hopper system, the pressure arranged between two unequal systems of pressure exactly can the intermediate system of intermittent change, and it is to be arranged by weight transfer conveying by intrasystem solid material larger for two pressure difference.Lock hopper system is the maximum system of current industrial use.
Generally, for the high pressure liquid fluid containing solid, the work of lock hopper is all perform according to the sequence program woven in advance.The equipment that lock hopper system comprises has: lock hopper, lock hopper rinse water pot, lock hopper recycle pump, Decompression valves, cleaning valve, Sludge washing-out valve, equalizer valve, receipts slag valve, slag-off valve, slag bath relief valve etc.Lock hopper circulation is roughly divided into pressure release, flushing, deslagging, pressurising, receipts slag double teacher, by lock hopper procedure auto-control.The pressure of high pressure liquid fluid can be reduced to normal low pressure or atmospheric pressure from tens MPas by lock hopper system usually.
But in actual applications, lock hopper system exists following problems, such as:
(1), because the work of lock hopper circulates the multistage intermittently, so high-pressure liquid cannot realize continuous-flow, lock hopper equipment and attached valve periodically receive the impact of contained solid particle in highly pressurised liquid and liquid, easily stress fatigue occur.
(2), cut off and decompression owing to using valve to realize pressure, high with leakage class requirement to the pressure rating of the valve of lock hopper upstream and downstream, and owing to containing a large amount of solid particle in fluid, even if valve adopts high-abrasive material, the also serious operational stability affecting valve and life-span.
(3), each duty cycle time of lock hopper is long, and up to 30 minutes, and upstream needed the pressure of the fluid of pressure release higher, and the required time is longer.
(4), the whole cyclic process of lock hopper system is complicated, and need complicated successive control system strictly to control, previous action does not complete or interrupts, and whole circulation will be caused to stop.
(5), the upper separating valve of lock hopper system, due to long periodic switch, make upstream high liquid impact very large to the valve seat of upper separating valve, valve rod and closure member etc., very easily to the erosion damaging fast of internals surface.
(6) solid particle, contained in upstream high liquid, under the carrying secretly of high-pressure liquid, valve internals constantly clashed into and wash away, making valve rod, valve seat and closure member surface of contact produce serious friction and wearing and tearing, make valve cannot action or produce leak.
(7), the minute solid particles that contains in high pressure liquid fluid, very easily deposit and stick to the surface of valve closing member, even invading the inside of valve component, cause valve seat activity actual effect, making valve cannot action or leak in occurring.
(8), the import and export bore of lock hopper is larger, under the repeated stock of high pressure liquid medium, very large to the compression shock of the sealing surface of valve, valve sealing face needs very high seal pressure, and the surface friction drag of the solid particle comprised in fluid is very large, therefore in valve switch process, causes jam, make actual opening valve open closedown moment, be far longer than general not containing the fluid moment at the same pressure of solid particle.
(9) if, in liquid containing corrosive elements, easily corrode the fresh table limit cruelly spilt by solid particle erosive wear, greatly aggravate damage and the fault of valve.
(10), under lock hopper system separation valve door easily in leak, cause the punching press of lock hopper system to complete or lock hopper pressure cannot pressure release to down-stream system pressure, cause next step blowdown step to carry out, whole lock hopper circulation stopping.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of for carrying out continuous pressure release to the high-pressure liquid containing solid particle, and the pressure relief system that pressure release is effective, maintenance cost is low, stable.
In order to realize above-mentioned target, the present invention adopts following technological scheme:
For carrying out a system for continuous pressure release to the high-pressure liquid containing solid particle, it is characterized in that, aforementioned system is in series primarily of two or more decompression original papers, passes through pipeline communication between adjacent decompression original paper; The cylindrical structure of aforesaid vacuum original paper, inside is formed with the passage passed through for the high-pressure liquid containing solid particle vertically, aforementioned channels is divided into five sections, be followed successively by: entrance point straight length, converging transition, aditus laryngis section, gradually expanding section, outlet end straight length, structure before and after aditus laryngis section is symmetrical, and the internal diameter of the internal diameter of entrance point straight length and outlet end straight length is all consistent with the internal diameter of pipeline.
The aforesaid system for carrying out continuous pressure release to the high-pressure liquid containing solid particle, it is characterized in that, aforesaid vacuum original paper is equipped with bypass, aforementioned bypass carrys out control switch by cut-off valve, aforementioned cut-off valve adopts the full-bore valve consistent with bypass duct diameter, and takes standard-sized sheet or full cut-off pattern.
The aforesaid system for carrying out continuous pressure release to the high-pressure liquid containing solid particle, is characterized in that, the ratio of the decompression original paper and total decompression original paper that are provided with bypass is less than 100%.
The aforesaid system for carrying out continuous pressure release to the high-pressure liquid containing solid particle, it is characterized in that, aforementioned system is provided with at least one spare duct, and aforementioned spare duct is also in series primarily of two or more decompression original papers, passes through pipeline communication between adjacent decompression original paper.
The aforesaid system for carrying out continuous pressure release to the high-pressure liquid containing solid particle, it is characterized in that, aforementioned system is provided with high pressure water backwash loop, high pressure water backwash inlet valve is arranged on the outlet end of last decompression original paper, and high pressure water backwash back-water valve (BWV) is arranged on the entrance point of first decompression original paper.
The aforesaid system for carrying out continuous pressure release to the high-pressure liquid containing solid particle, it is characterized in that, also comprise: the liquid container being arranged on high pressure side, the bottom of aforementioned liquid container is provided with stirring apparatus.
Usefulness of the present invention is:
(1), by the multiple identical or similar decompression original paper of combination, the continual pressure discharge operations of continuous print can be carried out, the low pressure from the pressure pressure release of tens kilograms even higher to several kilograms or normal pressure by containing solid high pressure liquid fluid;
(2), whole system without any throttle, do not have the cycle to be subject to high pressure yet and impact and the valve of solid particle erosion in fluid containing rheid, greatly reduce the maintenance of system, improve long-time steady operation;
(3), by online mode, under the condition that system upstream and downstream pressure is constant (system overall presure drop is constant), by setting up bypass on decompression original paper, change system flow resistance coefficient, can be online do not affect the prerequisite of flowing under, change the flow of liquid containing particle of circulation whole system.
Accompanying drawing explanation
Fig. 1 is the application schematic diagram of a specific embodiment of continuous pressure relief system of the present invention;
Fig. 2 is the structural representation of the decompression original paper in Fig. 1;
Fig. 3 is the application schematic diagram of continuous another specific embodiment of pressure relief system of the present invention.
The implication of reference character: 1-decompression original paper in figure, 2-bypass, 3-cut-off valve, 4-high pressure water backwash inlet valve, 5-high pressure water backwash back-water valve (BWV), the upper separating valve of 6-, separating valve under 7-, 8-liquid container, 9-stirring apparatus, 101-entrance point straight length, 102-converging transition, 103-aditus laryngis section, 104-gradually expanding section, 105-outlet end straight length.
Embodiment
Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.
With reference to Fig. 1, the system for carrying out continuous pressure release to the high-pressure liquid containing solid particle of the present invention is in series primarily of two or more decompression original papers 1, passes through pipeline communication between adjacent decompression original paper 1.
With reference to Fig. 2, the cylindrical structure of decompression original paper 1, inside is formed with the passage passed through for the high-pressure liquid containing solid particle vertically, this passage is divided into five sections, be followed successively by: entrance point straight length 101, converging transition 102, aditus laryngis section 103, gradually expanding section 104, outlet end straight length 105, the diameter of aditus laryngis section 103 can not be too little, must ensure that all solid particles can both pass through smoothly, structure before and after aditus laryngis section 103 is symmetrical, and the internal diameter of the internal diameter of entrance point straight length 101 and outlet end straight length 105 is all consistent with the internal diameter of pipeline, so not only can ensure that the high-pressure liquid containing solid particle enters in decompression original paper 1 smoothly, effectively can also reduce the clashing and breaking that the solid particle in highly pressurised liquid causes decompression original paper 1.
High-pressure liquid entrained solid particles flows through each decompression original paper, owing to there is convergent and flaring, produce local resistance loss, according to the diameter of aditus laryngis section and the diameter ratio of straight length, and the length of aditus laryngis section and the length of straight length, local resistance and on-way resistance that fluid flows through can be calculated respectively, total be exactly local resistance and on-way resistance sum (because straight length is shorter, local resistance will much larger than on-way resistance) by the drag overall of the original paper that reduces pressure.
Verification experimental verification is flow through through calculating and fluid, any pressure reduction is can be designed as in theory by the resistance of single decompression original paper, but practical application, not easily design excessive resistance, because the wearing and tearing of excessive resistance drop to decompression original paper obviously increase, and aditus laryngis section diameter is too small, is unfavorable for that the particle in fluid flows through, easily to block, the continuous operation of influential system.So two or more decompression original paper tandem compounds use by continuous pressure relief system of the present invention, thus achieve low pressure pressure being reduced to needs.The quantity of decompression original paper, need the pressure reduced specifically to determine according to upstream and downstream, the pressure drop of single decompression original paper is at 1 kilogram to 3 kilograms.
Can resist the corrosion of particle in fluid for guarantee system and wash away, guaranteeing system long-period stable operation, decompression original paper preferably adopts antifriction metal (AFM) or wear-resistant ceramic to make.
In actual applications, if the flow of the fluid flowed through needs to regulate, because the pressure of upstream high side and down stream low pressure side is generally changeless, namely pressure difference-powered constant, so the flow resistance coefficient of system can only be changed.Therefore, continuous pressure relief system of the present invention is equipped with bypass to one or more decompression original paper, and controls the switch of bypass with wear-resisting cut-off valve.If bypass is connected, be so equivalent to a segment pipe in parallel, the area that flows through of fluid becomes large, and coefficient of partial resistance just reduces, and whole system will automatically by flow velocity increase, to produce identical resistance drop.The cut-off valve of bypass adopts the full-bore valve consistent with bypass duct diameter, and takes standard-sized sheet or full cut-off pattern, and there is not the situation of frequent switch, its wearing and tearing almost do not have.
The scope of whole system Flow-rate adjustment, can be controlled by the number of bypass.The number of bypass is more, and the self-adjustable range of flow of flow system flow is larger.But, the quantity being provided with the decompression original paper of bypass is too much unsuitable, the decompression original paper that strictly should control to be provided with bypass accounts for the ratio of total decompression original paper, the ratio of the decompression original paper and total decompression original paper that are namely provided with bypass should be less than 100%, because if the pressure difference of upstream and downstream is larger, too much bypass causes the Pressure Drop on single decompression original paper excessive, and flash distillation, cavitation erosion easily occur, the impact decompression life-span of original paper and the operation stability of whole system.Therefore, more decompression original papers should be used as much as possible, to realize the steady decrease of pressure, until reduce to down stream low pressure pressure.
With reference to Fig. 3, as the preferred scheme of one, continuous pressure relief system of the present invention is also provided with at least one spare duct, and this spare duct is also in series primarily of two or more decompression original papers, passes through pipeline communication between adjacent decompression original paper.
As the preferred scheme of one, continuous pressure relief system of the present invention is also provided with high pressure water backwash loop, and high pressure water backwash inlet valve is arranged on the outlet end of last decompression original paper, and high pressure water backwash back-water valve (BWV) is arranged on the entrance point of first decompression original paper.The situation of blocking is there is at decompression original paper, pressure relief system upstream and downstream separating valve is turned off, ultrahigh pressure sparge water advances into from the valve of lower separating valve, and by unobstructed for the decompression original paper back flush of blocking, backwashing water leaves system from the high pressure water backwash back-water valve (BWV) after the upper separating valve of system.
For the system that some upstream and downstream pressure differences are larger, the pressure of backwashing water is also larger, is generally the twice of upstream and downstream pressure difference.For some system, the total decompression original paper quantity of system is a lot, for reducing the pressure resistance requirement of backwashing water, and improve the dredging effect of backwashing water, backwash loop can in conjunction with the bypass of decompression original paper, namely by being opened by the cut-off valve of bypass, increasing the area of circulation, reducing the pressure drop of backwashing water in flushing process.Such as, backwash first can carry out backwash operation to first decompression original paper of most upstream, the bypass cut-off valve of other decompression original papers is all opened, such backwash is just carried out mainly for first decompression original paper, after first decompression original paper rinses, adopt same operator scheme, backwash is carried out to second decompression original paper.
As can be seen here, when the high-pressure liquid continuous-flow containing solid particle, continuous pressure relief system of the present invention, by the combination of multi-step pressure reduction original paper, achieves the reduction of pressure.Because whole pressure relief system is without easy to wear, troublesome valve, so stability is high, maintenance rate is low.
In addition, because continuous pressure relief system of the present invention is provided with bypass to decompression original paper, the quantity of online decompression original paper can be changed by the switch of bypass, thus the fluid resistance flow coefficient of whole pressure relief system can be changed, so constant at upstream and downstream pressure, namely when pressure reduction is constant, the passive change along with system flow resistance coefficient changes by the flow of fluid, resistance coefficient is less, reach same pressure reduction, flow just needs larger, vice versa, thus achieve the online change of fluid flow, also the underspeeding of upstream liquid level (or downstream liquid level gather way) can just be controlled.
As the preferred scheme of one, continuous pressure relief system of the present invention also comprises: the liquid container 8 being arranged on high pressure side, and the bottom of this liquid container 8 is provided with stirring apparatus 9.Stirring apparatus 9 can ensure that solid particle better mixes with liquid, and the formation more uniform slurry of solid-liquid (solid content is high) or solid homogeneous suspended dispersed in the liquid phase, are so more conducive to the decompression in downstream and the Uniform Flow of logistics.
It should be noted that, above-described embodiment does not limit the present invention in any form, the technological scheme that the mode that all employings are equal to replacement or equivalent transformation obtains, and all drops in protection scope of the present invention.
Claims (8)
1. for carrying out the system of continuous pressure release to the high-pressure liquid containing solid particle, it is characterized in that, described system is in series primarily of two or more decompression original papers, passes through pipeline communication between adjacent decompression original paper; The cylindrical structure of described decompression original paper, inside is formed with the passage passed through for the high-pressure liquid containing solid particle vertically, described passage is divided into five sections, be followed successively by: entrance point straight length, converging transition, aditus laryngis section, gradually expanding section, outlet end straight length, structure before and after described aditus laryngis section is symmetrical, and the internal diameter of the internal diameter of entrance point straight length and outlet end straight length is all consistent with the internal diameter of pipeline.
2. the system for carrying out continuous pressure release to the high-pressure liquid containing solid particle according to claim 1, it is characterized in that, described decompression original paper is equipped with bypass, described bypass carrys out control switch by cut-off valve, described cut-off valve adopts the full-bore valve consistent with bypass duct diameter, and takes standard-sized sheet or full cut-off pattern.
3. the system for carrying out continuous pressure release to the high-pressure liquid containing solid particle according to claim 2, is characterized in that, the ratio of the decompression original paper and total decompression original paper that are provided with bypass is less than 100%.
4. the system for carrying out continuous pressure release to the high-pressure liquid containing solid particle according to claim 1,2 or 3, it is characterized in that, described system is provided with at least one spare duct, described spare duct is also in series primarily of two or more decompression original papers, passes through pipeline communication between adjacent decompression original paper.
5. the system for carrying out continuous pressure release to the high-pressure liquid containing solid particle according to claim 1,2 or 3, it is characterized in that, described system is provided with high pressure water backwash loop, high pressure water backwash inlet valve is arranged on the outlet end of last decompression original paper, and high pressure water backwash back-water valve (BWV) is arranged on the entrance point of first decompression original paper.
6. the system for carrying out continuous pressure release to the high-pressure liquid containing solid particle according to claim 1,2 or 3, it is characterized in that, also comprise: the liquid container being arranged on high pressure side, the bottom of described liquid container is provided with stirring apparatus.
7. a decompression original paper, it is characterized in that, the cylindrical structure of described decompression original paper, inside is formed with the passage passed through for the high-pressure liquid containing solid particle vertically, described passage is divided into five sections, be followed successively by: entrance point straight length, converging transition, aditus laryngis section, gradually expanding section, outlet end straight length, the structure before and after described aditus laryngis section is symmetrical, and the internal diameter of the internal diameter of entrance point straight length and outlet end straight length is all consistent with the internal diameter of pipeline.
8. decompression original paper according to claim 7, is characterized in that, described decompression original paper adopts antifriction metal (AFM) or wear-resistant ceramic to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510246211.8A CN104848036A (en) | 2015-05-14 | 2015-05-14 | System for continuously decompressing high pressure fluid containing solid particles |
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| CN201510246211.8A CN104848036A (en) | 2015-05-14 | 2015-05-14 | System for continuously decompressing high pressure fluid containing solid particles |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108706715A (en) * | 2018-06-13 | 2018-10-26 | 西安交通大学 | A kind of control pressurer system and method for supercritical water oxidation treatment system |
| CN110005955A (en) * | 2019-04-12 | 2019-07-12 | 武汉启诚生物技术有限公司 | A kind of negative pressure self-suction fluid dead space breaking plant |
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| CN104087346A (en) * | 2014-07-01 | 2014-10-08 | 中国华能集团清洁能源技术研究院有限公司 | Novel dry coal powder entrained-flow bed deslagging system |
| CN204664874U (en) * | 2015-05-14 | 2015-09-23 | 曹显奎 | Decompression original paper and to the system of carrying out continuous pressure release containing the high-pressure liquid of solid particle |
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| CN2486819Y (en) * | 2001-06-20 | 2002-04-17 | 张志民 | Pressure reduce water saving device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108706715A (en) * | 2018-06-13 | 2018-10-26 | 西安交通大学 | A kind of control pressurer system and method for supercritical water oxidation treatment system |
| CN110005955A (en) * | 2019-04-12 | 2019-07-12 | 武汉启诚生物技术有限公司 | A kind of negative pressure self-suction fluid dead space breaking plant |
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Application publication date: 20150819 |