CN211158650U - Process control device of high-load reboiler - Google Patents
Process control device of high-load reboiler Download PDFInfo
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- CN211158650U CN211158650U CN201922068525.XU CN201922068525U CN211158650U CN 211158650 U CN211158650 U CN 211158650U CN 201922068525 U CN201922068525 U CN 201922068525U CN 211158650 U CN211158650 U CN 211158650U
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- reboiler
- condensate tank
- pipeline
- liquid level
- control device
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Abstract
The utility model discloses a process control device of a high-load reboiler. The device comprises a condensate tank, a reboiler and a tower kettle, wherein a liquid level control device is arranged on the condensate tank, and a control signal wire of the liquid level control device is connected to a regulating valve. The utility model discloses a condensate tank outlet pipe is last regulating valve opening degree control condensate tank liquid level, further adjusts the liquid level height of reboiler shell side, changes through the effective heat transfer area of reboiler and controls the material gasification rate. For high duty reboilers, this control avoids the disturbing effects and hysteresis described in the background. The utility model discloses simple structure, excellent in use effect.
Description
Technical Field
The utility model belongs to the technical field of the chemical industry technique and specifically relates to a process control device of high load reboiler.
Background
Rectification is the most extensive mass and heat transfer unit in petrochemical production and consists of a rectifying tower, a reboiler, a condenser, a reflux tank and other equipment. Wherein, the reboiler is a heat exchanger that can exchange heat, can vaporize again. The material liquid level in the reboiler and the liquid level in the rectifying tower are at the same height, a liquid phase is provided from the tower bottom and enters the reboiler, vaporization is carried out in the reboiler, the vaporized two-phase flow is sent back to the rectifying tower, and gas-liquid separation is carried out through a tower tray in the rectifying tower.
Typically, conventional column bottoms temperature is controlled by mean temperature difference and heat transfer area. The mean temperature difference control is achieved by adjusting the amount of reboiler inlet steam, which lacks sufficient control capability and range to eliminate disturbances. The heat transfer area control mode is realized by adjusting the flow of condensate at the outlet of the reboiler, and the scheme has hysteresis and needs large enough heat exchange area allowance so as to increase equipment investment. Therefore, it is particularly important to improve the conventional process control of the high duty reboiler.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a process control device of high load reboiler is provided, it has avoided disturbance influence and hysteresis, simple structure moreover.
The utility model discloses a realize like this: a process control device of a high-load reboiler comprises a condensate tank, a reboiler and a tower kettle, wherein a liquid level control device is arranged on the condensate tank, the top of the condensate tank is connected with a steam pipeline a through a pipeline b, and the bottom of the condensate tank is connected with a steam condensation water pipeline d through a pipeline c; a shell pass inlet of the reboiler is connected with a steam pipeline a, a shell pass outlet of the reboiler is connected with a steam condensate pipe d, an adjusting valve is arranged on the steam condensate pipe d, and a control signal line of the liquid level control device is connected to the adjusting valve; the tube side outlet of the reboiler is connected with the gas phase inlet of the tower kettle through a pipeline e, and the liquid phase material outlet of the tower kettle is connected with the tube side inlet of the reboiler through a pipeline f.
The installation height of the lower tube plate of the reboiler is 420mm higher than the lower interface 380 of the condensate tank liquid level meter.
Since the technical scheme is used, compare with prior art, the utility model discloses a condensate tank outlet pipe goes up regulating valve opening degree control condensate tank liquid level, further adjusts the liquid level height of reboiler shell side, changes through the effective heat transfer area of reboiler and controls the material gasification rate. For high duty reboilers, this control avoids the disturbing effects and hysteresis described in the background. The utility model discloses simple structure, excellent in use effect.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1 is a condensate tank, 2 is a reboiler, 3 is a tower kettle, 4 is a liquid level control system, and 5 is an adjusting valve; 6-line a, 7-line b, 8-line c, 9-line d, 10-line e, 11-line f.
Detailed Description
The embodiment of the utility model provides a: a process control device of a high-load reboiler comprises a condensate tank 1, a reboiler 2 and a tower kettle 3, wherein a liquid level control device 4 is arranged on the condensate tank 1, the top of the condensate tank 1 is connected with a steam pipeline a6 through a pipeline b7, and the bottom of the condensate tank 1 is connected with a steam condensate pipeline d9 through a pipeline c 8; a shell pass inlet of the reboiler 2 is connected with a steam pipeline a6, a shell pass outlet of the reboiler 2 is connected with a steam condensate water pipeline d9, a regulating valve 5 is arranged on the steam condensate water pipeline d9, and a control signal line of the liquid level control device 4 is connected with the regulating valve 5; the tube side outlet of the reboiler 2 is connected with the gas phase inlet of the tower bottom 3 through a pipeline e10, and the liquid phase material outlet of the tower bottom 3 is connected with the tube side inlet of the reboiler 2 through a pipeline f 11.
The installation height of the lower pipe plate of the reboiler 2 is 420mm higher than the lower interface 380 of the liquid level meter of the condensate tank 1.
Claims (2)
1. The utility model provides a high load reboiler's process control device, includes condensate tank (1), reboiler (2) and tower cauldron (3), its characterized in that: a liquid level control device (4) is arranged on the condensate tank (1), the top of the condensate tank (1) is connected with a steam pipeline a (6) through a pipeline b (7), and the bottom of the condensate tank (1) is connected with a steam condensation water pipeline d (9) through a pipeline c (8); a shell pass inlet of the reboiler (2) is connected with a steam pipeline a (6), a shell pass outlet of the reboiler (2) is connected with a steam condensation water pipeline d (9), an adjusting valve (5) is arranged on the steam condensation water pipeline d (9), and a control signal line of the liquid level control device (4) is connected to the adjusting valve (5); the tube side outlet of the reboiler (2) is connected with the gas phase inlet of the tower kettle (3) through a pipeline e (10), and the liquid phase material outlet of the tower kettle (3) is connected with the tube side inlet of the reboiler (2) through a pipeline f (11).
2. The process control apparatus of a high duty reboiler of claim 1 wherein: the installation height of the lower pipe plate of the reboiler (2) is 420mm higher than the lower interface 380 of the liquid level meter of the condensate tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922068525.XU CN211158650U (en) | 2019-11-26 | 2019-11-26 | Process control device of high-load reboiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922068525.XU CN211158650U (en) | 2019-11-26 | 2019-11-26 | Process control device of high-load reboiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211158650U true CN211158650U (en) | 2020-08-04 |
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ID=71823256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922068525.XU Active CN211158650U (en) | 2019-11-26 | 2019-11-26 | Process control device of high-load reboiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211158650U (en) |
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2019
- 2019-11-26 CN CN201922068525.XU patent/CN211158650U/en active Active
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