CN103488197A - Flash liquid level automatic control device - Google Patents
Flash liquid level automatic control device Download PDFInfo
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- CN103488197A CN103488197A CN201310469286.3A CN201310469286A CN103488197A CN 103488197 A CN103488197 A CN 103488197A CN 201310469286 A CN201310469286 A CN 201310469286A CN 103488197 A CN103488197 A CN 103488197A
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- liquid level
- tank body
- differential pressure
- control valve
- flash distillation
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a flash vessel liquid level automatic control device which comprises a liquid level automatic control device comprising a differential pressure liquid level control valve. The differential pressure liquid level control valve comprises a control opening communicated with a top gas chamber of a flash tank through an air pressure transmission pipe and a liquid inlet formed in a height position, corresponding to the set liquid level, of the flash tank. When the liquid level in the flash tank is not higher than the liquid inlet of the differential pressure liquid level control valve, the differential pressure liquid level control valve is in a closed state, and an outlet of a drain pipe is sealed. When the liquid level in the flash tank is higher than the liquid inlet of the differential pressure liquid level control valve, the differential pressure liquid level control valve is opened, and liquid in the flash tank is drained from the drain pipe to a downstream pipeline. When the liquid level returns to be equal to the liquid inlet of the differential pressure liquid level control valve in height, the differential pressure liquid level control valve is closed, so that the liquid level in the flash tank is maintained in a position corresponding to the liquid inlet of the differential pressure liquid level control valve, and the purpose of stably and reliably regulating the liquid level in the flash tank is achieved.
Description
Technical field
The present invention relates to a kind of flash evaporator liquid-level auto-control device.
Background technology
At present, at chemical industry, in the industries such as metallurgy, the condensate water that well heater is discharged is because temperature is high, also contain a lot of heats, need to enter the flash evaporator liquid-level auto-control device and carry out flash distillation, the secondary vapour flashed off enters suitable place and uses, take full advantage of the heat energy of high-temperature condensation water, tradition flash evaporator liquid-level auto-control device adopts liquid level gauge to detect liquid level, variable valve is controlled water flow and is controlled liquid level in the flash evaporator liquid-level auto-control device, and liquid level gauge can carry out the action of regulating and controlling threshold switch according to surveyed liquid level, so that liquid level gauge carries out the chain automatic control of liquid level in conjunction with variable valve.But cost of investment is higher on the one hand for the chain control mode voluntarily of this liquid level, be limited by the other hand the stability of liquid level gauge and pressure regulator valve, the flash evaporator liquid-level auto-control device slack tank caused when easily and adjustment inaccurate in the liquid level detection is malfunctioning or the situation of canful, so that liquid level is frequent fluctuation within the specific limits, the poor stability of liquid level regulation and control.
Summary of the invention
The purpose of this invention is to provide a kind of flash evaporator liquid-level auto-control device that liquid level in the flash distillation tank body is carried out to reliable and stable regulation and control.
In order to realize above purpose, the technical scheme of flash evaporator liquid-level auto-control device of the present invention is as follows:
A kind of flash evaporator liquid-level auto-control device, the liquid-level auto-control device that comprises flash distillation tank body and upper assembling thereof, described liquid-level auto-control device comprises for controlling the differential pressure level control valve of flash distillation tank body discharge opeing, the differential pressure level control valve has the control mouth that is communicated with the top air chamber of flash distillation tank body by the air pressure transmission conduit, in with the flash distillation tank body on the inlet of default liquid level corresponding height position, for being communicated with the liquid outlet of downstream line, the inlet of differential pressure level control valve is communicated with the flash distillation tank body by drainage tube, the entrance of drainage tube is not higher than the outlet of drainage tube.
Offer the drainage tube mounting hole inserted for the drainage tube inlet end on described flash distillation tank body, the inlet end of drainage tube extend into the bottom position place of flash distillation tank body.
The inlet of described differential pressure level control valve is lower than the inlet of flash distillation tank body.
The air chamber mouth be communicated with the air pressure transmission conduit on described flash distillation tank body is lower than the exhausr port of flash distillation tank body.
In the present invention, the control mouth of differential pressure level control valve is communicated with on the air chamber of the top of flash distillation tank body by the air pressure transmission conduit, and the inlet of differential pressure level control valve is in the default liquid level corresponding position of flash distillation tank body and be communicated with on the flash distillation tank body by drainage tube.When in the flash distillation tank body, liquid level is not higher than the inlet position of differential pressure level control valve, the inlet internal pressure of differential pressure level control valve will can be higher than the top air chamber internal gas pressure of flash distillation tank body, and air pressure transmission conduit internal gas pressure equates with flash distillation tank body internal gas pressure, so that the inlet pressure of differential pressure level control valve is higher than controlling a mouthful internal gas pressure, the differential pressure level control valve is in closed condition, and the outlet of drainage tube is sealed up; When in the flash distillation tank body, liquid level is higher than the inlet position of differential pressure level control valve, the inlet internal pressure of differential pressure level control valve will be higher than the air pressure of the top air chamber of flash distillation tank body, the inlet pressure of corresponding differential pressure level control valve will be higher than the pressure of controlling mouth, so that the differential pressure level control valve is opened, the differential pressure level control valve is connected to conducting between drainage tube and downstream line, makes liquid in the flash distillation tank body drain into downstream line from drainage tube; When liquid level falls back to the position contour with the inlet of differential pressure level control valve again, the pressure of the inlet of differential pressure level control valve and control mouth equates once more, now the differential pressure level control valve can be closed again, make the outlet of drainage tube be sealed up, so that the interior liquid level of flash distillation tank body is maintained at the inlet corresponding position of differential pressure level control valve, make liquid level in the flash tank body be maintained at the position contour with the inlet of differential pressure level control valve, realize the effect in the flash distillation tank body, liquid level is carried out reliable and stable adjustment.
The accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of the present invention.
Embodiment
The embodiment of flash evaporator liquid-level auto-control device of the present invention: as shown in Figure 1, this flash evaporator liquid-level auto-control device is applicable to utilize high temperature, the high pressure condensate water that in the technical fields such as chemical industry, metallurgy, oil, heat transmission equipment is discharged, it comprises the liquid-level auto-control device of flash distillation tank body 1 and upper assembling thereof, and liquid-level auto-control device consists of drainage tube 4, differential pressure level control valve 5 and air pressure conducting tube 6.The bend loss that wherein drainage tube 4 is connected between vertical segment and flat tube section by the vertical segment vertically be obliquely installed, horizontally disposed flat tube section, transition forms, vertical segment is assemblied in flash distillation tank body 1, so that the lower end mouth of pipe of vertical segment is for inserting the entrance of the drainage tube 4 in the flash distillation tank body; The inner of flat tube section is communicated with the top in vertical segment by bend loss, in the lateral opening that the outer end of flat tube section is offered from the sidewall of flash distillation tank body 1, stretches out, and the mouth of pipe of external part is the outlet of the drainage tube 4 for the outflow of condensation water.Air pressure transmission conduit 6 is kapillary, and the upper end of air pressure transmission conduit 6 is communicated with on the air chamber mouth of offering at the top of flash distillation tank body 1, and the lower end of air pressure transmission conduit 6 is communicated with on differential pressure level control valve 5.The inlet of differential pressure level control valve 5 is communicated with in the outlet of drainage tube 4, and the leakage fluid dram of differential pressure level control valve 5 is for being communicated with in downstream line, and the lower end of air pressure transmission conduit 6 is connected on the control mouth of differential pressure level control valve 5.
The principle of work of the liquid-level auto-control device in the present embodiment on the flash evaporator liquid-level auto-control device is as follows:
High temperature out of heat transmission equipment, high pressure condensate water, from the inlet 2 of flash distillation tank body 1 enters flash distillation tank body 1, carry out flash distillation, and the secondary vapour produced after flash distillation is discharged from exhausr port 3, and condensate water can collect in the bottom of flash distillation tank body 1.When water surface elevation is H (liquid level as shown in Figure 1), condensate water can flood the entrance of drainage tube 4, and now the air pressure of the interior secondary vapour of the top air chamber of flash distillation tank body 1 is P1, the inlet of differential pressure level control valve 5 (being equivalent to the outlet of drainage tube 4) pressure is P2, law of connected vessels due to air pressure transmission conduit 6, the control mouth pressure P0=P1 of differential pressure level control valve 5, when the interior liquid level of flash distillation tank body 1 during lower than the inlet of differential pressure level control valve 5, P2=P1=P0, at differential pressure level control valve 5, close, the outlet of drainage tube 4 is sealed up and not draining; As the interior liquid level H of flash distillation tank body 1 during higher than the inlet height of differential pressure level control valve 5, P2>P0, differential pressure level control valve 5 is opened, and condensate water starts to be discharged into downstream line, from flash distillation tank body 1, discharges.Therefore in the process of flash distillation tank body 1 interior level change, when liquid level reduces, P2 pressure diminishes, and flows out discharge reduction; When liquid level rises, it is large that P2 pressure becomes, and it is large that differential pressure also becomes thereupon, and flow increases, and reaches a kind of mobile equilibrium.
In the above-described embodiments, drainage tube inserts in the flash distillation tank body, and in other embodiments, it is external that drainage tube also can other be placed in flash tank, and be communicated with on the flash distillation tank body by the lower end of drainage tube.
In the above-described embodiments, the entrance of drainage tube is lower than outlet, to guarantee liquid level in the flash distillation tank body, the entrance of drainage tube carried out to water seal, and in other embodiments, the entrance of drainage tube also can be contour with outlet.
Claims (4)
1. a flash evaporator liquid-level auto-control device, the liquid-level auto-control device that comprises flash distillation tank body and upper assembling thereof, it is characterized in that, described liquid-level auto-control device comprises for controlling the differential pressure level control valve of flash distillation tank body discharge opeing, the differential pressure level control valve has the control mouth that is communicated with the top air chamber of flash distillation tank body by the air pressure transmission conduit, in with the flash distillation tank body on the inlet of default liquid level corresponding height position, for being communicated with the liquid outlet of downstream line, the inlet of differential pressure level control valve is communicated with the flash distillation tank body by drainage tube, the entrance of drainage tube is not higher than the outlet of drainage tube.
2. flash evaporator liquid-level auto-control device according to claim 1, is characterized in that, offers the drainage tube mounting hole inserted for the drainage tube inlet end on described flash distillation tank body, and the inlet end of drainage tube extend into the bottom position place of flash distillation tank body.
3. flash evaporator liquid-level auto-control device according to claim 1, is characterized in that, the inlet of described differential pressure level control valve is lower than the inlet of flash distillation tank body.
4. according to claim 1 or 2 or 3 described flash evaporator liquid-level auto-control devices, it is characterized in that, the air chamber mouth be communicated with the air pressure transmission conduit on described flash distillation tank body is lower than the exhausr port of flash distillation tank body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310469286.3A CN103488197B (en) | 2013-10-10 | 2013-10-10 | flash liquid level automatic control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310469286.3A CN103488197B (en) | 2013-10-10 | 2013-10-10 | flash liquid level automatic control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103488197A true CN103488197A (en) | 2014-01-01 |
| CN103488197B CN103488197B (en) | 2016-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310469286.3A Expired - Fee Related CN103488197B (en) | 2013-10-10 | 2013-10-10 | flash liquid level automatic control device |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU535552A1 (en) * | 1975-01-22 | 1976-11-15 | Предприятие П/Я Г-4372 | Jet Regulator Liquid Level |
| US4390037A (en) * | 1979-12-14 | 1983-06-28 | W. T. Fail, Inc. | Gas regulation device for gas actuated valves |
| CN2209346Y (en) * | 1994-11-17 | 1995-10-04 | 贺明 | Overflow-proof self-sealing system |
| CN2844990Y (en) * | 2005-09-02 | 2006-12-06 | 山东华鲁恒升化工股份有限公司 | Condensed liquid levelling device |
-
2013
- 2013-10-10 CN CN201310469286.3A patent/CN103488197B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU535552A1 (en) * | 1975-01-22 | 1976-11-15 | Предприятие П/Я Г-4372 | Jet Regulator Liquid Level |
| US4390037A (en) * | 1979-12-14 | 1983-06-28 | W. T. Fail, Inc. | Gas regulation device for gas actuated valves |
| CN2209346Y (en) * | 1994-11-17 | 1995-10-04 | 贺明 | Overflow-proof self-sealing system |
| CN2844990Y (en) * | 2005-09-02 | 2006-12-06 | 山东华鲁恒升化工股份有限公司 | Condensed liquid levelling device |
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|---|---|
| CN103488197B (en) | 2016-06-22 |
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Granted publication date: 20160622 Termination date: 20171010 |