CN101791485A - Flash boiler vacuumized gas-liquid-solid separation device - Google Patents
Flash boiler vacuumized gas-liquid-solid separation device Download PDFInfo
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- CN101791485A CN101791485A CN201010001486A CN201010001486A CN101791485A CN 101791485 A CN101791485 A CN 101791485A CN 201010001486 A CN201010001486 A CN 201010001486A CN 201010001486 A CN201010001486 A CN 201010001486A CN 101791485 A CN101791485 A CN 101791485A
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Abstract
The invention discloses a flash boiler vacuumized gas-liquid-solid separation device, which mainly comprises an inlet buffer tank, a liquid ring type vacuum pump, a gas-liquid-solid separating tank, a working solution pump, a cooler, a filter tank, a minimum flow protection valve, and the like. By cooling the working solution and removing and recovering solid powder, higher vacuum degree for vacuumizing a flash boiler is realized, and the boosted propylene gas is totally discharged into an air tank for recovery.
Description
Technical field
The present invention relates to a kind of gas-liquid solid separation device that is used for bulk polypropylene device flash distillation still pumped vacuum systems.
Background technology
Bulk polypropylene technology is domestic independent development, and a kind of polypropylene production technology that is widely used at home.In the bulk polypropylene device production process, liquid propene is under the effect of catalyst and activator etc., and under 3.5MPa (table) reaction pressure and 75 ℃ of reaction temperatures, polymerization reaction take place in polymeric kettle generates the polypropylene solid powder.After polymerisation finishes, remaining propylene in the polymeric kettle need be reclaimed, do not contained the polypropylene solid powder of propylene simultaneously.Generally, at first carry out high pressure and reclaim the propylene operation, be exactly pressure by polymeric kettle self, the pressure that balances each other that will be higher than propylene condensation temperature correspondence is with the propylene condensation on top and reclaim, the propylene that reaches 1.3～1.5MPa (table) until the polymeric kettle pressure (pressure that balances each other is determined by condensation temperature) that balances each other.Second step be with the solid polypropylene powder in the polymeric kettle and remaining propylene gas together gradually material spray to the flash distillation still, and the pressure reduction between the gas holder of dependence flash distillation still and polypropylene exhaust gas recovery system, most propylene gas is carried out the propylene recovery by go into gas holder from pressure, make in the flash distillation still in a basic balance with the pressure of gas holder.Behind second EOS, carry out the vacuumized nitrogen operation of the 3rd step, with liquid-ring vacuum pump the flash distillation still is vacuumized exactly, propylene gas in the flash distillation still extracted out enter gas holder after boosting, to reclaim propylene wherein, and then in the flash distillation still nitrogen injection, so repeated multiple times vacuumizes and nitrogen injection, monomer propylene in the flash distillation still all comes out to enter gas holder with nitrogen replacement the most at last, the density of propylene that makes the flash distillation gas reactor reaches safe polypropylene powder discharging condition less than 1%.Realize the technology purpose of above-mentioned the 3rd step vacuumized nitrogen process, require the heat that the liquid-ring vacuum pump course of work produces is in time discharged, make working solution keep lower operating temperature, so that reach than higher vacuum; Need simultaneously a small amount of polypropylene solid powder that vacuum may be taken out of is separated, to prevent to block pumped vacuum systems.
The flash distillation still that Chinese patent 00213748.8 proposes vacuumizes with the nitrogen replacement flow process and is, with liquid-ring vacuum pump the flash distillation still is vacuumized, at vacuum pump outlet the firsts and seconds gas and water separator is set, and compensator, purpose is the gas-water separation with vacuum pump outlet, and the most water-free propylene gas enters gas holder.But this patent is not mentioned the problem of how solid powder in the propylene gas being told; In addition, the bulk polypropylene device vaccum-pumping equipment mostly adopts liquid-ring vacuum pump usually, and this patent is not introduced the circulation and the cooling problem of working solution yet, and the circulation of working solution and cooling problem not only influence and vacuumize effect, and influences water consumption.
Chinese patent 02138515.7 has proposed a kind of propylene gas retracting device and technology, and the vacuum recovery system in this patent reclaims compressor and propylene recovery filtering tank etc. by filtering tank, surge tank, gas-liquid separator, vacuum and forms.The inlet of vacuum recovery system links to each other with the flash distillation still, and outlet links to each other with gas holder.In the practice, remove solid powder in the propylene gas with filtering tank, not only remove and may bother, the pressure drop of filtering tank also can be bigger; This patent is not mentioned the circulation and the cooling problem of working solution yet.
Summary of the invention
An object of the present invention is to propose a kind ofly in time to remove the working solution heat and effectively remove the flash boiler vacuumized gas-liquid-solid separation device that vacuumizes the polypropylene solid powder that carries in the propylene gas.
The flash boiler vacuumized gas-liquid-solid separation device gas access that the present invention proposes is communicated with the flash distillation still, and gas vent is communicated with the gas holder of propylene gas recovery system.Mainly consolidate knockout drum, work liquid pump, cooler, lautertuns, minimum discharge protective valve etc. by inlet buffer, liquid-ring vacuum pump, gas-liquid, and the pipeline composition that connects each equipment room.The liquid-ring vacuum pump inlet of flash boiler vacuumized gas-liquid-solid separation device links to each other with inlet buffer; and be communicated with the flash distillation still by inlet buffer; the liquid-ring vacuum pump outlet links to each other with the solid knockout drum of gas-liquid; the gas vent that gas-liquid is separated tank deck admittedly is communicated with the gas holder of propylene gas recovery system; the gas line of the solid knockout drum of gas-liquid is communicated with by minimum discharge protective wire and the minimum discharge protective valve that is located on the minimum discharge protective wire with the liquid-ring vacuum pump arrival line; be provided with a circle in the solid knockout drum of gas-liquid and lack the shape inclined clapboard; inclined clapboard is divided into two parts up and down with the liquid in the jar; being located at the solid knockout drum supernatant liquid extraction of gas-liquid mouth links to each other with the working solution pump intake; the working solution pump discharge links to each other with the cooler inlet; cooler outlet feeds and is located at high-order lautertuns; below the liquid layer in the solid knockout drum of working solution return line insertion gas-liquid of lautertuns, the solid knockout drum bottom of gas-liquid is extracted mouth out and is linked to each other with liquid-ring vacuum pump working solution inlet.When the flash distillation still is vacuumized, the propylene gas that the flash distillation still contains the small amount of solid powder is after inlet buffer and liquid-ring vacuum pump boost, enter the solid knockout drum of gas-liquid, gas and Separation of Solid and Liquid in jar, the propylene gas of telling drains into gas holder and reclaims, the solid powder that swims in the working solution upper strata boosts through the work liquid pump with working solution, and after cooler cools, filter to isolate solid powder at lautertuns, the working solution of telling behind the solid powder returns the solid knockout drum of gas-liquid through return line, form the cooling and the Separation of Solid and Liquid circulation of working solution, reach cooling work liquid and the purpose of telling solid powder, the working solution of the ratio lower temperature that does not contain solid powder that extract out the solid knockout drum bottom of gas-liquid enters liquid-ring vacuum pump, form the working solution circulation of liquid-ring vacuum pump, thereby guarantee that the flash distillation still can be pumped to than higher vacuum.When inlet buffer pressure was lower than setting value, the minimum discharge protective valve was opened automatically, and the protection vavuum pump can not crossed the low cavitation erosion that occurs because of inlet pressure.
Description of drawings
Fig. 1 is the schematic flow sheet of flash boiler vacuumized gas-liquid-solid separation device of the present invention
The specific embodiment
Below in conjunction with Fig. 1 the said flash boiler vacuumized gas-liquid-solid separation device of the present invention is further specified.It is emphasized that following embodiment just in order to help to understand better the present invention, can not be considered to the restriction to content of the present invention.All should be within the scope of the present invention according to various replacements and change that spirit of the present invention and present technique field general knowledge carry out.
Flash boiler vacuumized gas-liquid-solid separation device (2) is communicated with flash distillation still (1) by feed gas pipeline (22), through the boosting of flash boiler vacuumized gas-liquid-solid separation device (2), remove solid after, discharge gas and enter gas holder (3) through pipeline (33) and carry out follow-up propylene recycling.Flash boiler vacuumized gas-liquid-solid separation device (2) is mainly by inlet buffer (4), liquid-ring vacuum pump (5), the solid knockout drum (6) of gas-liquid, work liquid pump (7), cooler (8), lautertuns (9), minimum discharge protective valve (12) etc., and the pipeline composition that connects each equipment room.Liquid-ring vacuum pump (5) inlet of flash boiler vacuumized gas-liquid-solid separation device (2) is communicated with by pipeline (25) with inlet buffer (4); and be communicated with flash distillation still (1) through pipeline (22) by inlet buffer (4); liquid-ring vacuum pump (5) outlet links to each other by pipeline (26) with the solid knockout drum (6) of gas-liquid; the gas vent on the solid knockout drum (6) of gas-liquid top is communicated with by pipeline (33) with the gas holder (3) of propylene gas recovery system; the exit gas pipeline (33) of the solid knockout drum (6) of gas-liquid and the suction line (25) of liquid-ring vacuum pump (5) are communicated with by minimum discharge protective wire (34) and the minimum discharge protective valve (12) that is located on the minimum discharge protective wire; inlet buffer (4) is provided with a pressure controller (11) that can open or close minimum discharge protective valve (12) according to the vacuum pump inlet pressure that is provided with automatically; be provided with a circle in the solid knockout drum (6) of gas-liquid and lack shape inclined clapboard (13); inclined clapboard (13) is divided into two parts up and down with the liquid in the jar; on the tank skin of liquid level in jar (37) height; be provided with a visor (14); the liquid extraction mouth that is located at solid knockout drum (6) top of gas-liquid is communicated with by pipeline (28) with work liquid pump (7) inlet; work liquid pump (7) outlet is communicated with by pipeline (29) with cooler (8) inlet; the cooling medium side of cooler (8) is communication loop water back with water inlet line (35) and water outlet pipeline (36) respectively; the outlet of cooler (8) feeds through pipeline (30) and is located at high-order lautertuns (9); be provided with screen pack (10) in the lautertuns (9); working solution after filtering returns in the solid knockout drum (6) of gas-liquid by pipeline (32) circulation of inserting in the solid knockout drum (6) of gas-liquid; what one band valve (38) can also be set on liquid-ring vacuum pump outlet line (29) washes away pipeline (31), and solid knockout drum (6) bottom of gas-liquid is extracted out mouthful to enter the mouth with liquid-ring vacuum pump (5) working solution and is communicated with by pipeline (27).
When with flash boiler vacuumized gas-liquid-solid separation device (2) to flash distillation still (1) when vacuumizing, the propylene gas that may contain the small amount of solid powder that is drawn out of is earlier after pipeline (22) and inlet buffer (4), enter liquid-ring vacuum pump (5) through pipeline (25) with the working solution (normally water) that returns vavuum pump through pipeline (27) circulation then, after vavuum pump boosts to a little more than normal pressure, gas-liquid-solid mixture enters the solid knockout drum (6) of gas-liquid through pipeline (26), gas and Separation of Solid and Liquid in jar, the propylene gas of telling drains into gas holder (3) through pipeline (33), enters the subsequent recovery flow process.After entering the solid knockout drum (6) of gas-liquid and finishing gas-liquid and separate admittedly, the solid powder (polypropylene solid powder severe is less than water) that swims in the working solution upper strata enters work liquid pump (7) with working solution through pipeline (28), after boosting, enter cooler (8) again through pipeline (29), with enter cooler through back with water inlet line (35) and leave the recirculated water heat exchange of cooler through water outlet pipeline (36), the heat that produces of the vavuum pump process of boosting is recycled water and takes out of thus, working solution after cooling enters lautertuns (9) through pipeline (30), at solidliquid mixture during through 20～80 purpose screen packs (10) of the setting in filter pocket (9), solid powder is filtered out, and when running up to a certain degree, be eliminated, the working solution of telling behind the solid powder returns under the liquid layer (37) of the solid knockout drum (6) of gas-liquid through return line (32), form the cooling and the Separation of Solid and Liquid circulation of working solution, realize cooling work liquid and the purpose of telling solid powder.The working solution of the ratio lower temperature of extracting out from solid knockout drum (6) bottom of gas-liquid that does not contain solid powder enters liquid-ring vacuum pump (5) through pipeline (27) circulation, form the working solution circulation of liquid-ring vacuum pump (5), thereby guarantee that the flash distillation still can be pumped to than higher vacuum.The purpose that inclined clapboard (13) is set in the solid knockout drum (6) of gas-liquid is a solidliquid mixture that solid powder and working solution are contained in top and the cleaning liquid of bottom separates, make the working solution that enters the bottom the least possible carry solid powder, powder enters the bottom even working solution has carried small amount of solid, these solid powders also can be accumulated in the below of inclined clapboard (13), and finally rely on buoyancy to return the top working solution along inclined clapboard (13).In order better the solid powder in the solid knockout drum (6) of gas-liquid to be taken out of via work liquid pump (7), cooler (8) and lautertuns (9), can open the valve (38) that is located on the pipeline (31) when needing, with working solution with pressure liquid layer (37) is washed away, prevent solid powder in the accumulation of liquid layer top, effect of washing away and solid powder accumulation can be observed by visor (14).In production practices; a flash boiler vacuumized gas-liquid-solid separation device (2) often will be born the task that some flash distillation stills are vacuumized; vacuumize switching slot or all flash distillation stills when not vacuumizing no matter at this moment be; cavitation erosion may appear because inlet vacuum is too high in liquid-ring vacuum pump (5); thereby damage equipment; the purpose that the minimum discharge protective valve is set prevents that exactly liquid-ring vacuum pump (5) from cavitating; when inlet buffer (4) pressure is lower than setting value; pressure controller (11) is opened minimum discharge protective valve (12) automatically, allows the exit gas of liquid-ring vacuum pump (5) be back into the interruption-forming circulation via pipeline (34).
Embodiment
One flash distillation still to be vacuumized, volume 10m3, internal memory polypropylene solid powder 3.2t, pressure 130kpa (A), with flash boiler vacuumized gas-liquid-solid separation device of the present invention it is vacuumized, flash distillation still pressure is evacuated to 10kpa (A) the most at last, and the propylene gas in the flash distillation still all enters gas holder and reclaims after device boosts, the working solution temperature is 30 ℃ in the knockout drum, reclaims solid powder 1kg/ still in lautertuns.
Claims (1)
1. flash boiler vacuumized gas-liquid-solid separation device, it is characterized in that, liquid-ring vacuum pump (5) inlet of flash boiler vacuumized gas-liquid-solid separation device (2) is communicated with inlet buffer (4), and be communicated with flash distillation still (1) by inlet buffer (4), liquid-ring vacuum pump (5) outlet links to each other with the solid knockout drum (6) of gas-liquid, the gas vent on the solid knockout drum (6) of gas-liquid top is communicated with the gas holder (3) of propylene gas recovery system, the exit gas pipeline (33) of the solid knockout drum (6) of gas-liquid and liquid-ring vacuum pump suction line (25) are communicated with by minimum discharge protective wire (34) and the minimum discharge protective valve (12) that is located on the minimum discharge protective wire, inlet buffer (4) is provided with a pressure controller (11) that can open or close minimum discharge protective valve (12) according to the vacuum pump inlet pressure that is provided with automatically, be provided with a circle in the solid knockout drum (6) of gas-liquid and lack shape inclined clapboard (13), inclined clapboard (13) is divided into two parts up and down with the liquid in the jar, on the tank skin of liquid level in jar (37) height, be provided with a visor (14), the liquid extraction mouth that is located at solid knockout drum (6) top of gas-liquid is communicated with work liquid pump (7) inlet, work liquid pump (7) outlet is communicated with cooler (8) inlet, the outlet of cooler (8) feeds and is located at high-order lautertuns (9), be provided with screen pack (10) in the lautertuns (9), working solution after filtering returns in the solid knockout drum (6) of gas-liquid by inserting interior pipeline (32) circulation of the solid knockout drum (6) of gas-liquid, and solid knockout drum (6) bottom of gas-liquid is extracted mouth out and is communicated with liquid-ring vacuum pump (5) working solution inlet; When with flash boiler vacuumized gas-liquid-solid separation device (2) to flash distillation still (1) when vacuumizing; the propylene gas that may contain the small amount of solid powder that is drawn out of is through inlet buffer (4); the working solution that returns liquid-ring vacuum pump (5) with circulation enters liquid-ring vacuum pump (5); after vavuum pump boosts to a little more than normal pressure; gas-liquid-solid mixture enters the solid knockout drum (6) of gas-liquid; gas and Separation of Solid and Liquid in jar; the propylene gas of telling drains into gas holder (3); enter the subsequent recovery flow process; after finishing gas-liquid and separating admittedly; the solid powder that swims in the working solution upper strata enters work liquid pump (7) with working solution; after boosting; entering cooler (8) again cools; the heat that produces of the vavuum pump process of boosting is taken out of thus; working solution after cooling enters lautertuns (9); in lautertuns (9); solid powder is filtered out; and when running up to a certain degree, be eliminated; the working solution of telling behind the solid powder returns under the liquid layer (37) of the solid knockout drum (6) of gas-liquid through return line (32); form the cooling and the Separation of Solid and Liquid circulation of working solution; realize cooling work liquid and the purpose of telling solid powder; the working solution circulation of the ratio lower temperature of extracting out from solid knockout drum (6) bottom of gas-liquid that does not contain solid powder enters liquid-ring vacuum pump (5); form the working solution circulation of liquid-ring vacuum pump (5); thereby guarantee that the flash distillation still can be pumped to than higher vacuum; by automatic unlatching or close the minimum discharge protective valve, prevent that liquid-ring vacuum pump (5) from cavitating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010001486A CN101791485A (en) | 2010-01-07 | 2010-01-07 | Flash boiler vacuumized gas-liquid-solid separation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010001486A CN101791485A (en) | 2010-01-07 | 2010-01-07 | Flash boiler vacuumized gas-liquid-solid separation device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103961894A (en) * | 2014-05-05 | 2014-08-06 | 南京高捷轻工设备有限公司 | Solid-liquid mixed high-temperature solution waste heat recycling and utilizing device and method |
| CN104548642A (en) * | 2015-02-04 | 2015-04-29 | 崔俊章 | Separation method of solvent of phytoextraction mixture |
| CN104587691A (en) * | 2015-01-28 | 2015-05-06 | 新疆新昌生物科技有限公司 | Solvent separation device of phytoextraction mixture |
| CN104971511A (en) * | 2015-03-17 | 2015-10-14 | 浙江中山化工集团股份有限公司 | Safe, highly-efficient and environment-friendly distillation device |
| CN108386711A (en) * | 2018-03-29 | 2018-08-10 | 宁波富德能源有限公司 | A kind of method of propylene tank water filling recycling gas phase |
| CN114738275A (en) * | 2022-03-09 | 2022-07-12 | 吴世根 | Vacuum water-cooling buffering separation system |
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2010
- 2010-01-07 CN CN201010001486A patent/CN101791485A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103961894A (en) * | 2014-05-05 | 2014-08-06 | 南京高捷轻工设备有限公司 | Solid-liquid mixed high-temperature solution waste heat recycling and utilizing device and method |
| CN103961894B (en) * | 2014-05-05 | 2016-04-13 | 南京高捷轻工设备有限公司 | Solid-liquid mixing pyrosol waste heat recycling device and method |
| CN104587691A (en) * | 2015-01-28 | 2015-05-06 | 新疆新昌生物科技有限公司 | Solvent separation device of phytoextraction mixture |
| CN104548642A (en) * | 2015-02-04 | 2015-04-29 | 崔俊章 | Separation method of solvent of phytoextraction mixture |
| CN104971511A (en) * | 2015-03-17 | 2015-10-14 | 浙江中山化工集团股份有限公司 | Safe, highly-efficient and environment-friendly distillation device |
| CN108386711A (en) * | 2018-03-29 | 2018-08-10 | 宁波富德能源有限公司 | A kind of method of propylene tank water filling recycling gas phase |
| CN114738275A (en) * | 2022-03-09 | 2022-07-12 | 吴世根 | Vacuum water-cooling buffering separation system |
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Application publication date: 20100804 |