CN103949091B - Liquid/liquid circle level control device that the overflow of a kind of profit nature is separated - Google Patents
Liquid/liquid circle level control device that the overflow of a kind of profit nature is separated Download PDFInfo
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- CN103949091B CN103949091B CN201410161510.7A CN201410161510A CN103949091B CN 103949091 B CN103949091 B CN 103949091B CN 201410161510 A CN201410161510 A CN 201410161510A CN 103949091 B CN103949091 B CN 103949091B
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Abstract
Liquid/liquid circle level control device that the overflow of a kind of profit nature is separated, process tank (2) is provided with supernatant liquid outlet, lower floor's liquid outlet is arranged at bottom, lower floor's liquid outlet connects the first inverted-loop tube, the peak of the first inverted-loop tube and process tank (2) interior supernatant liquid allow highly equal with the interface of lower floor's liquid, the peak of the first inverted-loop tube has pipeline and process tank (2) top to link up, the second positive U-shaped pipe is connected after first inverted-loop tube, the length of the outer straight tube (U3) of the second positive U-shaped pipe to make in it load the difference in change that pressure that layer liquid causes is not less than process tank (2) interior gas pressure, and the length of the outer straight tube (U3) of the second positive U-shaped pipe to make in it load the pressure that layer liquid causes and add that atmospheric pressure should be greater than the interior gas maximum pressure of process tank (2), simultaneously the peak of the second positive U-shaped pipe straight tube (U3) is outward lower than the peak of the first inverted-loop tube.The present invention has the advantage that structure is simple, control reliability is high, operating cost is low.
Description
Technical field
The present invention relates to the liquid/liquid circle level control device of nature overflow.
Background technology
In petrochemical industry, in the industries such as chemical machinery, some normal pressures/pressure-fired process tank due to liquid bottom outlet pressure low, flow is little, or there is the process conditions of larger fluctuation in flow, be difficult to adopt control valve directly to carry out liquid/liquid circle position control, simultaneously because tank deck exists small pressure oscillation, the gas that flammable/poisonous grade need recycle, the reason of the aspects such as layering interfaces control overflow, list " U " can not be adopted from overflow process, existing solution generally adopts increases technique aqueous phase outlet increase delivery pump in conjunction with liquid level/position, boundary control, moisturizing inlet flow rate controls, above-mentioned settling mode all exists investment to be increased, the shortcomings such as operating cost is high.
Summary of the invention
The object of this invention is to provide a kind of utilize process liquid layering, density contrast, etc. inherent characteristic design from overflowing liquid/liquid circle level control device, it effectively can overcome the pressure oscillation that process tank exists, keep liquid/liquid circle position to stablize, and there is the advantage that structure is simple, control reliability is high, operating cost is low.
The present invention is achieved in that
Liquid/liquid circle level control device that the overflow of a kind of profit nature is separated, it as shown in the figure, it is two " U " type tubular construction, process tank 2 is provided with supernatant liquid outlet according to supernatant liquid liquid level design height, lower floor's liquid outlet is had bottom process tank 2, lower floor's liquid outlet connects the first straight tube U1 of the first inverted-loop tube, the peak of the first inverted-loop tube and supernatant liquid in process tank 2 allow highly equal with the interface of lower floor's liquid, when the peak of lower floor's liquid levels higher than the first inverted-loop tube, lower floor's liquid nature is discharged from the first inverted-loop tube, the peak of the first inverted-loop tube has pipeline and process tank 2 top to link up, the second positive U-shaped pipe is connected after first inverted-loop tube, the length of the outer straight tube U3 of the second positive U-shaped pipe to make in it load the difference in change that pressure that layer liquid causes is not less than gas pressure in process tank 2, and the length of the outer straight tube U3 of the second positive U-shaped pipe to make in it load the pressure that layer liquid causes and add that atmospheric pressure should be greater than gas maximum pressure in process tank 2, the outer straight tube U3 upper outlet of the second positive U-shaped pipe communicates with air, simultaneously the peak of the second positive U-shaped pipe straight tube U3 is outward lower than the peak of the first inverted-loop tube.
Liquid/liquid circle level control device that profit nature of the present invention overflow is separated is following operation:
Step one, according to technological requirement, before two " U " type pipe 1 comes into operation, in the outer straight tube U3 pipe of the second positive U-shaped pipe, be full of technique lower floor liquid in advance; Keep that the first inverted-loop tube peak is communicated with process tank 2 top gas phase, U3 pipe upper outlet communicates with air;
Step 2, when the first inverted-loop tube peak overflow position balance control value of liquid/liquid interface after process tank 2 water-oil separating a little more than two " U " type pipe, aqueous phase at the bottom of process tank 2 tank utilizes self gravitation to cover the first overflow position, inverted-loop tube top through the first inverted-loop tube first straight tube U1 to enter in U2 pipe, because the first inverted-loop tube peak is communicated with process tank 2 top gas phase, therefore in process tank 2, pressure change does not affect liquid/liquid interface height in process tank 2;
The effect of step 3, the second positive U-shaped pipe is the gas in fluid-tight process tank 2, process liquid in the interior straight tube U2 of the second positive U-shaped pipe, the outer straight tube U3 pipe of the second positive U-shaped pipe on the upside of self proportion characteristic and U2 in process tank 2 the outer straight tube U3 ambient outlet pressures of gaseous pressure, the second positive U-shaped pipe acting in conjunction under balance form certain liquid level difference, when on aqueous phase in the outer straight tube U3 of the second positive U-shaped pipe manages, liquid level exceedes the top mouth of pipe, natural overflow is discharged.
In operation pressure fluctuation range, the pressure oscillation of process tank 2 only has an impact to the aqueous phase liquid level difference of U2, U3 pipe, and the liquid/liquid interface of process tank 2 keeps stable.
Liquid/liquid circle level control device that above-mentioned profit nature overflow is separated, a dividing plate can be had in described process tank 2, two parts are separated into by process tank 2, the height of dividing plate is identical with supernatant liquid liquid level design height, when in process tank 2, supernatant liquid liquid level is higher than dividing plate, supernatant liquid climbs over another part that dividing plate enters process tank 2, and this section bottom has supernatant liquid to export.
Liquid/liquid circle level control device that above-mentioned profit nature overflow is separated, the first described inverted-loop tube can be arranged in process tank 2.
Liquid/liquid circle level control device that above-mentioned profit nature overflow is separated, when the first described inverted-loop tube is arranged in process tank 2, U-shaped pipe can substitute with dividing plate.
Liquid/liquid circle the level control device of profit nature overflow separation of the present invention, effectively can overcome the pressure oscillation existed in process tank, keep liquid/liquid circle position to stablize, and have the advantage that structure is simple, control reliability is high, operating cost is low.
Accompanying drawing explanation
Fig. 1 is liquid/liquid circle level control device schematic diagram that typical profit nature of the present invention overflow is separated, and wherein 1 is two " U " type structures, and U1 is the first inverted-loop tube first straight tube; U2 is straight tube in the second positive U-shaped pipe; U3 is the outer straight tube of the second positive U-shaped pipe; 2 for needing the process tank controlling liquid/liquid circle position.
Fig. 2 is liquid/liquid circle level control device schematic diagram that the profit nature overflow of the embodiment of the present invention 2 is separated, and wherein 1 is two " U " type structures, and U1 is the first inverted-loop tube first straight tube; U2 is straight tube in the second positive U-shaped pipe; U3 is the outer straight tube of the second positive U-shaped pipe; 2 for needing the process tank controlling liquid/liquid circle position.
Fig. 3 is liquid/liquid circle level control device schematic diagram that the profit nature overflow of the embodiment of the present invention 3 is separated, and wherein 1 is two " U " type structures, and U1 is the first inverted-loop tube first straight tube; U2 is straight tube in the second positive U-shaped pipe; U3 is the outer straight tube of the second positive U-shaped pipe; A is the outer side shield of the first inverted-loop tube first straight tube U1; B is baffle plate between straight tube U2 in the positive U-shaped pipe of the first straight tube U1 and second; 2 for needing the process tank controlling liquid/liquid circle position; 3 is water ring vacuum pump.
Detailed description of the invention
Example 1:
See accompanying drawing 1
Atmospheric Tower return tank 2 diameter 1000mm refined by certain petroleum chemical enterprise's white oil, tank deck contains imflammable gas access flare system high altitude discharge, return tank 2 upper gaseous phase pressure ?5 ~ 10KPa fluctuation, temperature 15 ~ 40 DEG C in tank, in tank inner condensat liquid, a small amount of water (0 ~ 200Kg/hr) enters underground sewage gathering system needing excision after water-oil separating; For ensureing oil-water separation, oil-water interfaces normally control at 200 ~ 350mm place at the bottom of tank, oil phase density 0.790 ~ 0.820kg/L in tank, water proof height of baffle plate 650mm in tank.
Liquid/liquid circle level control device that this return tank aqueous phase adopts the overflow of profit of the present invention nature to be separated excises, the steel pipe of DN80 is adopted to make the liquid/liquid circle level control device of profit nature overflow separation, the overflow position of the first inverted-loop tube peak adopts and arranges from 575mm at the bottom of tank, and in the second positive U-shaped pipe, straight tube U2 pipe range (straight length) adopts the low 900mm in overflow position of 2200mm, the second positive U-shaped pipe straight tube U3 upper outlet interface and the first inverted-loop tube peak outward to arrange.
Before liquid/liquid circle level control device that the overflow of profit nature is separated normally comes into operation, first fill the supreme interface of water at the outer straight tube U3 of the second positive U-shaped pipe, the outer straight tube U3 of second positive U-shaped pipe exports top and directly communicates with air, first inverted-loop tube top is communicated with the gas-liquid equilibrium on return tank 2 top, and what liquid/liquid circle level control device that the overflow of this profit nature is separated can meet return tank within the scope of technology controlling and process cuts water requirement.
Example 2
See accompanying drawing 2
Certain petroleum chemical enterprise's gas white oil is separated stripping Top of Vacuum Tower tank 2 diameter 2000mm, tank deck fuel gas need enter heating furnace and enter heating furnace as fuel and burn, stripping Top of Vacuum Tower tank 2 pressure is temperature 15 ~ 40 DEG C in 0 ~ 25KPa fluctuation, tank, excision is needed containing a small amount of condensed oil in tank inner condensat liquid, water (0 ~ 2000Kg/hr) need enter underground sewage gathering system, ensure oil-water separation, oil-water interfaces normally control at 600 ~ 900mm place at the bottom of tank, oil phase density 0.780 ~ 0.830kg/l in tank, water proof height of baffle plate 1300mm in tank.
Liquid/liquid circle level control device that this return tank aqueous phase adopts the overflow of profit of the present invention nature to be separated excises, the steel pipe of DN150 is adopted to make the liquid/liquid circle level control device of two " U " structure profit nature overflow separation, first inverted-loop tube peak is communicated with the gas-liquid equilibrium on return tank 2 top and is arranged in Top of Vacuum Tower tank 2, the overflow position of the first inverted-loop tube peak adopts and arranges from 1185mm at the bottom of tank, in second positive U-shaped pipe, straight tube U2 pipe range (straight length) adopts 3600mm, the outer straight tube U3 upper outlet interface of second positive U-shaped pipe and the low 400mm of the first inverted-loop tube peak are arranged.
Before liquid/liquid circle level control device that this profit nature overflow is separated normally comes into operation, first fill the supreme interface of water at the outer straight tube U3 of the second positive U-shaped pipe, what the liquid/liquid circle level control device of this profit nature overflow separation can meet stripping Top of Vacuum Tower tank 2 within the scope of technology controlling and process cuts water requirement.
Example 3
See accompanying drawing 3
Certain petrochemical plant white oil refining plant piece-rate system overhead water ring vacuum pump 3 moisturizing balance water pot 2 need ensure that in moisturizing balance water pot, liquid level keeps relative stability, because of in vavuum pump 3 start-stop and running due to tolerance fluctuation larger, the not solidifying fuel gas that water ring vacuum pump moisturizing balance water pot 2 top is extracted out adopts high-altitude emptying, a small amount of oil slick in water pot upper strata needs extraction to enter oil recovery system, in moisturizing balance water pot 2 there is the fluctuation of 0 ~ 3KPa in pressure, coolant-temperature gage 15 ~ 45 DEG C in water pot.
Water ring vacuum pump 3 require water level require in the scope that requires at moisturizing balance water pot 500 ~ 600mm, this water ring vacuum pump 3 moisturizing compensator 2 adopts two " U " type plumber skill by water pot Liquid level, dividing plate is adopted to make the interior straight tube U2 of the positive U-shaped pipe of the first inverted-loop tube first straight tube U1 and second of liquid/liquid circle level control device that the overflow of two " U " structure profit nature is separated in tank, the outer side block a plate hight of first inverted-loop tube first straight tube U1 is set as 600mm, bottom retains 50mm space, between the first straight tube U1 with straight tube U2 in the second positive U-shaped pipe, baffle plate b is connected with tank bottom, plate hight 500mm, the outer straight tube U3 pipe c of second positive U-shaped pipe adopts DN40 steel pipe, upper outlet than in the positive U-shaped pipe of the first straight tube U1 and second between straight tube U2 on baffle plate b the low 100mm in interface arrange.
When liquid/liquid circle level control device that this profit nature overflow is separated comes into operation, according to the turn on pump mode of water ring vacuum pump, progressively the water level in water ring vacuum pump moisturizing compensator 2 is added in U3 pipe after pump startup and have water overflow, tank internal upper part sump oil adopts irregularly incision oil recovery system, liquid/liquid circle level control device that this profit nature overflow is separated effectively can reduce the consumption of supplementing water, ensure that water ring vacuum pump 3 stablizes the liquid level demand of supplementing water, ensure that sump oil content reaches company's sewage drainage standard without obvious oil bloom in sewage effluent simultaneously.
Claims (4)
1. liquid/liquid circle the level control device of a profit nature overflow separation, it is characterized in that: it is two " U " type tubular construction, process tank (2) is provided with supernatant liquid outlet according to supernatant liquid liquid level design height, lower floor's liquid outlet is arranged at process tank (2) bottom, lower floor's liquid outlet connects first straight tube (U1) of the first inverted-loop tube, the peak of the first inverted-loop tube and process tank (2) interior supernatant liquid allow highly equal with the interface of lower floor's liquid, when the peak of lower floor's liquid levels higher than the first inverted-loop tube, lower floor's liquid nature is discharged from the first inverted-loop tube, the peak of the first inverted-loop tube has pipeline and process tank (2) top to link up, the second positive U-shaped pipe is connected after first inverted-loop tube, the length of the outer straight tube (U3) of the second positive U-shaped pipe to make in it load the difference in change that pressure that layer liquid causes is not less than process tank (2) interior gas pressure, and the length of the outer straight tube (U3) of the second positive U-shaped pipe to make in it load the pressure that layer liquid causes and add that atmospheric pressure should be greater than the interior gas maximum pressure of process tank (2), outer straight tube (U3) upper outlet of the second positive U-shaped pipe communicates with air, simultaneously the peak of the second positive U-shaped pipe straight tube (U3) is outward lower than the peak of the first inverted-loop tube.
2. liquid/liquid circle the level control device of profit nature overflow separation according to claim 1, it is characterized in that: in described process tank (2), have a dividing plate, two parts are separated into by process tank (2), the height of dividing plate is identical with supernatant liquid liquid level design height, when in process tank (2), supernatant liquid liquid level is higher than dividing plate, supernatant liquid climbs over another part that dividing plate enters process tank (2), and this section bottom has supernatant liquid to export.
3. liquid/liquid circle the level control device of profit nature overflow separation according to claim 1, is characterized in that: the first described inverted-loop tube is arranged in process tank (2).
4. liquid/liquid circle level control device of being separated of profit according to claim 3 nature overflow, is characterized in that: the first described inverted-loop tube be arranged on process tank (2) interior time, the first inverted-loop tube is alternative with dividing plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410161510.7A CN103949091B (en) | 2014-04-21 | 2014-04-21 | Liquid/liquid circle level control device that the overflow of a kind of profit nature is separated |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410161510.7A CN103949091B (en) | 2014-04-21 | 2014-04-21 | Liquid/liquid circle level control device that the overflow of a kind of profit nature is separated |
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| CN103949091A CN103949091A (en) | 2014-07-30 |
| CN103949091B true CN103949091B (en) | 2016-03-30 |
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| CN108273452B (en) * | 2018-01-30 | 2023-09-26 | 浙江工业大学 | Grease epoxidation reactor |
| CN113428289A (en) * | 2021-06-29 | 2021-09-24 | 广船国际有限公司 | Methanol fuel tank and ship |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2843573Y (en) * | 2005-07-07 | 2006-12-06 | 中国石化胜利油田有限公司河口采油厂 | Mixed-liquid automatic separator |
| CN202166899U (en) * | 2011-07-14 | 2012-03-14 | 南京乌江化工有限公司 | Tower kettle liquid level control device |
| CN103015504A (en) * | 2013-01-10 | 2013-04-03 | 浙江同济科技职业学院 | Intelligent siphoning and water-saving water tank |
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2014
- 2014-04-21 CN CN201410161510.7A patent/CN103949091B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2843573Y (en) * | 2005-07-07 | 2006-12-06 | 中国石化胜利油田有限公司河口采油厂 | Mixed-liquid automatic separator |
| CN202166899U (en) * | 2011-07-14 | 2012-03-14 | 南京乌江化工有限公司 | Tower kettle liquid level control device |
| CN103015504A (en) * | 2013-01-10 | 2013-04-03 | 浙江同济科技职业学院 | Intelligent siphoning and water-saving water tank |
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