CN203075683U - Steam condensate residual heat recycling device of reboiler of rectification device - Google Patents
Steam condensate residual heat recycling device of reboiler of rectification device Download PDFInfo
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- CN203075683U CN203075683U CN 201320016486 CN201320016486U CN203075683U CN 203075683 U CN203075683 U CN 203075683U CN 201320016486 CN201320016486 CN 201320016486 CN 201320016486 U CN201320016486 U CN 201320016486U CN 203075683 U CN203075683 U CN 203075683U
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Abstract
The utility model provides a steam condensate residual heat recycling device of a reboiler of a rectification device. The steam condensate residual heat recycling device comprises the reboiler (3), a steam trap valve group (8), a steam adjusting valve (9), a steam heat pump (5) and a steam flash tank (4). A heated steam inlet of the reboiler is connected with an outlet of the steam heat pump; a steam condensate outlet of the reboiler is connected with a condensate inlet of the steam flash tank through the steam trap valve group; a steam outlet of the steam flash tank is connected with a suction opening of the steam heat pump; an inlet of the steam heat pump is connected with an outlet of the steam adjusting valve; and an inlet of the steam adjusting valve is used as a heated steam inlet. Steam condensate discharged by the reboiler is discharged into the steam flash tank to be decompressed and flashed; flashed secondary low-pressure steam is pressurized by the steam heat pump and then is conveyed into the reboiler; residual heat is recycled, so that the steam power consumption is saved; and the steam heat pump effectively utilizes the pressure difference between a steam pipe net and steam of the reboiler to realize the pressurization conveying of low-pressure flashed steam and reduce the invalid devaluation of throttling and depressurizing energy.
Description
Technical field
The utility model belongs to the heat recovery technology field of chemical separating device, relates to a kind of steam condensed water waste heat retracting device of reboiler of rectifier unit.
Background technology
Distillation process is a kind of common unit operations that is used to separate the homogeneous liquid mixture, and the foundation of its separation is the volatility difference of various components in the mixture.In order to realize the component separation, need make mixed liquor partly vaporize or the gas partial condensation.During the mixing material vaporization, light component ratio contained in the gas phase will be than increasing in the former mixing material, and promptly light component purity uprises in the gas phase; During Mixed Gas Condensation, heavy ends concentration will increase than gas heavy ends in the condensate liquid, and promptly heavy ends purity uprises in the liquid.By some such evaporative condenser unit of contacting, just can obtain highly purified separator at the rectifying column two ends.In order to realize evaporation and condensation, rectifying tower top need add the cooling link, removes a part of heat from the cat head material steam, allows a part of cooling fluid reflux; And the tower still of rectifying column need add the heating link, to produce steam.The heating of tower still needs a large amount of water vapours to heat, and a large amount of condensed waters that produce after the water vapour heat release are discharged by steam trap.3% the leakage vapour rate and traditional steam trap is had an appointment has in actual use caused certain energy waste.In addition, hydrophobic not smooth phenomenon often appears in traditional steam trap, influenced heat-transfer effect, in actual production sometimes in order to improve heat-transfer effect and heating stability, the way of having to take suitably to drive by-passing valve is overcome, but because aperture is difficult to grasp, thereby can cause bigger leakage vapour, also cause bigger energy waste.In addition, the double evaporation-cooling vapour that the saturated condensed water of certain pressure produces when discharging discharges sky, does not recycle, and has also caused certain energy waste.Also have, the steam pressure that common rectifier unit tower still needs is lower, and the pipe network steam pressure is higher relatively, need realize by the steam control valve expenditure and pressure, caused the invalid devaluation of energy, the steam that makes high-grade (pressure) causes with the qualitative waste of energy at the steam that does not have to be converted under the situation of externally doing work low-grade (pressure).
Summary of the invention
The purpose of this utility model is to propose a kind of steam condensed water waste heat retracting device of reboiler of rectifier unit, can reclaim the leaked steam of steam trap, further reclaim the part heat in the saturated condensed water, and can reduce the qualitative waste of usefulness energy that causes because of the steam throttling step-down.
The steam condensed water waste heat retracting device of the reboiler of this rectifier unit comprises reboiler, drain valve group, steam control valve, steam heat pump and steam flash tank.The heating steam import of reboiler links to each other with the steam heat delivery side of pump, the steam condensate (SC) outlet of reboiler links to each other with the condensed water import of steam flash tank by the drain valve group, the steam (vapor) outlet of steam flash tank links to each other with the pump orifice of steam heat pump, the import of steam heat pump links to each other with the outlet of steam control valve, and the import of steam control valve is the heating steam import.
The steam condensed water waste heat retracting device of the reboiler of this rectifier unit, the steam condensate (SC) that reboiler is discharged enters step-down flash distillation in the steam flash tank by the drain valve group, under the ejector action of steam heat pump, the pressure of flash tank is near an atmospheric pressure, after the secondary low-voltage steam utilization steam heat pump supercharging that flashes off, send in the reboiler again, reclaim its waste heat, thereby saved steam consumption, the steam heat pump has effectively utilized the pressure reduction between steam pipe system and the used steam of reboiler, realized that the supercharging of low pressure flash steam carries, overcome the invalid devaluation of the energy that expenditure and pressure causes to a certain extent, reduced with can qualitative waste.
Description of drawings
Fig. 1 is the structural representation of original rectifier unit.
Fig. 2 is the structural representation of steam condensed water waste heat retracting device of the reboiler of rectifier unit of the present invention.
The specific embodiment
Original rectifier unit is made of rectifying column 1, condenser 2, reboiler 3, drain valve group 8, steam control valve 9, cooling sea water regulating valve 10, phegma control valve 11, cat head discharging control valve 12 as shown in Figure 1.The overhead vapours condenser heat of rectifying column 1 is taken away by extraneous cooling water, and the liquid evaporation heat is provided by external heat steam at the bottom of the tower.The steam condensate (SC) that reboiler 3 produces enters boiler by conventional drain valve group 8, and the double evaporation-cooling vapour that leaked steam that the drain valve group produces and steam condensate (SC) produce is not recycled, but by boiler sky is discharged.
The steam condensed water waste heat retracting device of the reboiler of rectifier unit of the present invention comprises reboiler 3, drain valve group 8, steam control valve 9, steam heat pump 5, steam flash tank 4 as shown in the dot-dash wire frame among Fig. 2.Wherein steam heat pump and steam flash tank increase newly.The heating steam import of reboiler 3 links to each other with the outlet of steam heat pump 5, the condensation-water drain of reboiler links to each other with the condensed water import of steam flash tank 4 by drain valve group 8, the steam (vapor) outlet of steam flash tank links to each other with the pump orifice of steam heat pump, the import of steam heat pump links to each other with the outlet of steam control valve 9, and the import of steam control valve is the heating steam import.The steam condensate (SC) that former rectifier unit firing equipment---reboiler 3 is discharged enters step-down flash distillation in the steam flash tank 4 by drain valve group 8.Under the ejector action of steam heat pump 5, after secondary low-voltage steam utilization steam heat pump 5 superchargings that flash off, send into again in the firing equipment 3 of rectifier unit, reclaim its waste heat.The effect of steam flow control valve 9 mainly is Load Regulation and opens, opens when stopping or cut off steam, the decompression process of steam is mainly finished in steam heat pump 5, effectively utilized steam pressure difference between steam pipe system and reboiler and realized that the supercharging of low pressure flash steam carries, overcome the invalid devaluation of the energy that expenditure and pressure causes to a certain extent, reduced with can qualitative waste.When rectifier unit reached maximum throughput, the aperture of steam control valve 9 was about 80%, and the pressure of flash tank 4 is near an atmospheric pressure.
As shown in Figure 2, the steam condensed water waste heat retracting device of the reboiler of this rectifier unit also can comprise fluid level transmitter 6, condensate pump 7 and DCS control device.The import of condensate pump 7 links to each other with the delivery port of steam flash tank 4, fluid level transmitter is installed on the steam flash tank 4, the liquid level signal input of the signal output part of fluid level transmitter and DCS control device joins, and the condensate pump control signal output of DCS control device and the control signal input of condensate pump 7 join.Described drain valve group 8 can be illustrated in figure 2 as three orifice plate steam traps arranged side by side, and the hydrophobic flow of three orifice plate steam traps is respectively 50%, 75%, 100% of rectifier unit firing equipment design steam consumption quantity, and is arranged in order installation by size.
The DCS control system is according to the signal of fluid level transmitter 6 output, controls the rotating speed of condensate pump by the frequency converter output frequency of control condensate pump motor, realizes the control of its liquid level, and when liquid level is high more, output frequency is high more, and the condensate pump flow is also big more; When liquid level is low more, output frequency is low more, and the condensate pump flow is also more little; When liquid level reached 50%, the condensate pump electric machine frequency reached 50HZ, and condensate pump is operated at full capacity; When liquid level reached minimum control liquid level, the condensate pump electric machine frequency dropped to 0HZ, and condensate pump quits work, can be in actual motion with level stability remain on the above 100mm of delivery port between flash tank 50% liquid level.Three orifice plate steam traps can obtain 50%, 75%, 100%, 125%, 150%, 175%, 225% totally 7 kinds of hydrophobic flows by different combinations.According to producing load adjustment, be principle in the actual production, allow part steam and enter in the flash tank by orifice plate drain valve group with the not long-pending condensed water of reboiler.
Introduce the steam condensed water waste heat retracting device application example of the reboiler of rectifier unit of the present invention below:
One cover reclaims the device of methyl alcohol from methanol waste water, the original traditional rectifier unit that adopts as shown in Figure 1 of this device, and its reboiler 3 is by Steam Heating, and steam is provided by heat network system.Heat supply network steam pressure 0.6MPa reduces to the required pressure 0.10～0.15MPa of reboiler 3 heating by steam control valve 9 with steam pressure; Condensed water is discharged by steam trap, and the double evaporation-cooling vapour that the leakage vapour of steam trap and steam condensate (SC) produce discharges sky, does not recycle.This installs maximum wastewater treatment ability 18.5m
3/ h.
The above-mentioned device that from methanol waste water, reclaims methyl alcohol, adopt the technology of the present invention to transform, improved Methanol Recovery device as shown in Figure 2, on former methyl alcohol retracting device basis, devices such as newly-increased steam heat pump 5, steam flash tank 4, fluid level transmitter 6, condensate pump 7 and DCS control device, with the firing equipment in the original device---the steam condensate (SC) that reboiler 3 is discharged enters step-down flash distillation in the steam flash tank 4 by orifice plate drain valve group 8.Under the ejector action of steam heat pump 5, the pressure of flash tank 4, is sent in the firing equipment 3 of this device after secondary low-voltage steam utilization steam heat pump 5 superchargings that flash off near an atmospheric pressure again, reclaims its waste heat.Effectively utilized steam pressure difference between steam pipe system and this device firing equipment simultaneously and realized that the supercharging of low pressure flash steam carries, overcome the invalid devaluation of the energy that expenditure and pressure causes to a certain extent, reduced with can qualitative waste.The flash tank liquid level is controlled at the above 100mm of delivery port between flash tank 50% liquid level by the control of flash tank tank level control system with its liquid level, has thoroughly stopped leakage vapour phenomenon.
Energy-saving effect and economy are compared as follows before and after the above-mentioned Methanol Recovery plant modification:
In addition, transformation back steam condensate (SC) is discharged unobstructed, does not tie water in the reboiler, and the heat-transfer effect of reboiler obviously improves, and the required steam pressure of reboiler obviously reduces, and the operating flexibility and the disposal ability of device increase.Actual maximum throughput before this plant modification is 18.5m
3/ h, repacking back maximum throughput reaches 19.5m
3/ h.
Claims (2)
1. the steam condensed water waste heat retracting device of the reboiler of a rectifier unit, comprise reboiler (3), drain valve group (8), steam control valve (9), it is characterized in that this device also comprises steam heat pump (5) and steam flash tank (4), the heating steam import of reboiler links to each other with the steam heat delivery side of pump, the steam condensate (SC) outlet of reboiler links to each other with the condensed water import of steam flash tank by the drain valve group, the steam (vapor) outlet of steam flash tank links to each other with the pump orifice of steam heat pump, the import of steam heat pump links to each other with the outlet of steam control valve, and the import of steam control valve is the heating steam import.
2. the steam condensed water waste heat retracting device of the reboiler of rectifier unit as claimed in claim 1, it is characterized in that this device also comprises fluid level transmitter (6), condensate pump (7) and DCS control device, the import of condensate pump (7) links to each other with the delivery port of steam flash tank (4), fluid level transmitter is installed on the steam flash tank (4), the liquid level signal input of the signal output part of fluid level transmitter and DCS control device joins, the control signal input of the condensate pump control signal output of DCS control device and condensate pump (7) joins, described drain valve group (8) is three orifice plate steam traps arranged side by side, and the hydrophobic flow of three orifice plate steam traps is respectively 50% of rectifier unit firing equipment design steam consumption quantity, 75%, 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320016486 CN203075683U (en) | 2013-01-11 | 2013-01-11 | Steam condensate residual heat recycling device of reboiler of rectification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320016486 CN203075683U (en) | 2013-01-11 | 2013-01-11 | Steam condensate residual heat recycling device of reboiler of rectification device |
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|---|---|
| CN203075683U true CN203075683U (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320016486 Expired - Fee Related CN203075683U (en) | 2013-01-11 | 2013-01-11 | Steam condensate residual heat recycling device of reboiler of rectification device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055527A (en) * | 2013-01-11 | 2013-04-24 | 浙江嘉化集团股份有限公司 | Steam condensate residual heat recycling device of reboiler of rectification device |
| CN104406148A (en) * | 2014-11-26 | 2015-03-11 | 大连福佳·大化石油化工有限公司 | Power generation system capable of recovering waste heat of rectifying tower air cooler |
| CN105983242A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Tower equipment and use thereof |
| CN108716862A (en) * | 2018-07-10 | 2018-10-30 | 广州元印环境科技有限公司 | A kind of pressure swing type steam circulation system |
| CN108905256A (en) * | 2018-08-01 | 2018-11-30 | 清水湾Chdm科技有限公司 | A kind of multitower rectifying and dewatering power-economizing method and device |
| CN110280039A (en) * | 2019-07-30 | 2019-09-27 | 江苏超跃化学有限公司 | A kind of recycle device for the exhaust steam and lime set water that Steam reboiler generates |
-
2013
- 2013-01-11 CN CN 201320016486 patent/CN203075683U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055527A (en) * | 2013-01-11 | 2013-04-24 | 浙江嘉化集团股份有限公司 | Steam condensate residual heat recycling device of reboiler of rectification device |
| CN104406148A (en) * | 2014-11-26 | 2015-03-11 | 大连福佳·大化石油化工有限公司 | Power generation system capable of recovering waste heat of rectifying tower air cooler |
| CN105983242A (en) * | 2015-01-31 | 2016-10-05 | 中国石油化工股份有限公司 | Tower equipment and use thereof |
| CN108716862A (en) * | 2018-07-10 | 2018-10-30 | 广州元印环境科技有限公司 | A kind of pressure swing type steam circulation system |
| CN108716862B (en) * | 2018-07-10 | 2024-02-09 | 广州元印环境科技有限公司 | Pressure-variable steam thermodynamic cycle system |
| CN108905256A (en) * | 2018-08-01 | 2018-11-30 | 清水湾Chdm科技有限公司 | A kind of multitower rectifying and dewatering power-economizing method and device |
| CN110280039A (en) * | 2019-07-30 | 2019-09-27 | 江苏超跃化学有限公司 | A kind of recycle device for the exhaust steam and lime set water that Steam reboiler generates |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20180111 |
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| CF01 | Termination of patent right due to non-payment of annual fee |