CN203108394U - Cyclohexane oxidized tail gas treatment system - Google Patents
Cyclohexane oxidized tail gas treatment system Download PDFInfo
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- CN203108394U CN203108394U CN 201320018735 CN201320018735U CN203108394U CN 203108394 U CN203108394 U CN 203108394U CN 201320018735 CN201320018735 CN 201320018735 CN 201320018735 U CN201320018735 U CN 201320018735U CN 203108394 U CN203108394 U CN 203108394U
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Abstract
The utility model relates to a cyclohexane oxidized tail gas treatment system. The cyclohexane oxidized tail gas treatment system comprises an adsorption tower, a desorbed gas buffer tank, a desorbed gas mixing tank, a liquid separation tank, a compressor, a refrigeration dryer and a rear liquid separation tank, which are sequentially connected with one another, wherein the adsorption tower is connected with a gas inlet pipe and a gas outlet pipe, and also connected with the desorbed gas mixing tank through a vacuum pump and a cooler sequentially, and the bottoms of the liquid separation tank, the compressor, the refrigeration dryer and the rear liquid separation tank are jointly connected with a recovered liquid tank. The cyclohexane oxidized tail gas treatment system has the effects of fully recycling organic matter components in oxidized tail gas in the production of cyclohexanone, improving the yield of the cyclohexanone, and bringing huge economic benefits.
Description
Technical field
The invention belongs to chemical field, relate to a kind of cyclohexane oxidation exhaust treatment system.
Background technology
The process route that Cyclohexanone Production adopts cyclohexane and air oxidation to produce, the tail gas that produces is through the alcohol ketone low temperature absorption in process of production, and wherein most cyclohexanes are absorbed by liquid absorption, and tail gas is emptying on the spot.The direct discharging of oxidized tail gas had both caused environmental pollution, was again a kind of product losses simultaneously, and the organic matter that reclaims in the tail gas not only can reduce environmental pollution, and can reduce unit consumption of product.Therefore, reclaim the organic matter in the Cyclohexanone Production oxidized tail gas, reduce environmental pollution and reduce the key problem in technology that unit consumption has just become competition of the same trade.
Summary of the invention
The present invention provides the cyclohexane oxidation exhaust treatment system that a kind of organic matter recovering effect is good, economic benefit is high in order to remedy the deficiencies in the prior art.
The present invention is achieved through the following technical solutions:
Cyclohexane oxidation exhaust gas treating method of the present invention, adopt transformation absorption and the combination of stripping gas compression process, at first by transformation absorption, desorb, vacuumize the gas phase organic matter in the step enrichment oxidized tail gas, by pressurization, cooling organic matter is separated from gas phase then, i.e. the separatory process.
Detailed step is: the purified gas of tail gas after the absorption of adsorption tower transformation seen off, the contrary stripping gas of putting enters the stripping gas surge tank and cushions, by vavuum pump adsorption tower is vacuumized then, the Vacuum solutions of extracting out is air-breathing enter the cooler cooling after, enter the stripping gas blending tank and mix with the contrary stripping gas of putting, advance minute flow container then and carry out separatory, collect liquid state organics, the gas of telling is cooled off by compressor pressurizes, separatory reclaims the liquid state organics in the gas, the gas of going out from compressor divides flow container to carry out separatory through cooling driers and back successively, further reclaim the liquid state organics in the gas, the organic matter that at every turn obtains is reclaimed liquid compile and get final product.
The residue of dividing flow container to go out from the back reclaims gas and is back to transformation absorption process entrance, forms closed cycle.
Cyclohexane oxidation exhaust treatment system of the present invention, it is characterized in that: comprise the adsorption tower, stripping gas surge tank, stripping gas blending tank, branch flow container, compressor, cooling driers and the back branch flow container that connect successively, adsorption tower also connects air inlet pipe and outlet, adsorption tower also connects the stripping gas blending tank through vavuum pump, cooler successively, divides flow container, compressor, cooling driers and back to divide the bottom of flow container to be connected the recovery flow container jointly.
Gas outlet, back separatory tank top connects air inlet pipe.
Divide flow container and back to divide the gas outlet, top of flow container also to be connected blow-down pipe.
Gas outlet, adsorption tower top connects outlet through pressure regulating system.
The adsorption tower top also connects blow-down pipe.
Effect of the present invention is: this invention is adopted pressure swing adsorption technique on the basis of original system, make the organic matter composition in the Cyclohexanone Production oxidized tail gas obtain abundant recycling, improves the yield of cyclohexanone.Be example with the 60kt/a cyclohexanone production apparatus, the tail gas total amount is 10000m3/h, annually calculate by operation 8000h, and recyclable cyclohexane 900t, cyclohexanone 107.08t, cyclohexanol 29.83t, year can bring more than 1,000 ten thousand yuan economic benefit.
Description of drawings
Fig. 1 is that cyclohexane oxidation tail gas organic matter of the present invention reclaims the simple and easy schematic flow sheet of technology.
Fig. 2 is 8 simple and easy schematic flow sheets of adsorption tower.
Among the figure, 1. adsorption tower, 2. vavuum pump, 3. vavuum pump aftercooler, 4. stripping gas blending tank, 5. stripping gas surge tank, 6 reclaim flow container, 7. minute flow container, 8. compressor, 9. cooling driers, 10. flow container, 11. air inlet pipe, 12. blow-down pipes, 13 outlets, 14 pressure regulating systems are divided in the back.
The specific embodiment
Accompanying drawing is a kind of specific embodiment of the present invention.
Cyclohexane oxidation exhaust gas treating method of the present invention, adopt transformation absorption and the combination of stripping gas compression process, at first by transformation absorption, desorb, vacuumize the gas phase organic matter in the step enrichment oxidized tail gas, by pressurization, cooling organic matter is separated from gas phase then, i.e. the separatory process.
Concrete steps are: the purified gas of tail gas after the absorption of adsorption tower 1 transformation seen off, the contrary stripping gas of putting enters stripping gas surge tank 5 and cushions, by vavuum pump 2 adsorption tower is vacuumized then, the Vacuum solutions of extracting out is air-breathing enter cooler 3 coolings after, enter stripping gas blending tank 4 and mix with the contrary stripping gas of putting, advance minute flow container 7 then and carry out separatory, collect liquid state organics, the gas of telling is by compressor 8 pressurization coolings, separatory reclaims the liquid state organics in the gas, the gas of going out from compressor divides flow container 10 to carry out separatory through cooling driers 9 and back successively, further reclaim the liquid state organics in the gas, the organic matter that at every turn obtains is reclaimed liquid compile and get final product.The residue of dividing flow container 10 to go out from the back reclaims gas and is back to transformation absorption process entrance, forms closed cycle.
Cyclohexane oxidation exhaust gas treating method of the present invention, namely Cyclohexanone Production oxidized tail gas organic matter reclaims technology, is made up of transformation absorption process VPSA and stripping gas compression section two parts.
One, transformation absorbed portion
The Cyclohexanone Production oxidized tail gas, enter 8 adsorption towers 1 through air inlet pipe 11, tail gas through finish absorption, continuous four drop pressures in 8 adsorption towers 1, contraryly put, vacuumize, after continuous 4 boost pressures and product gas lift press, under the suction-operated of selection successively of multiple adsorbent, organic impurities in the oxidized tail gas is got off by various adsorbents adsorb, components such as the nitrogen that is not adsorbed flow out from adsorption tower 1 cat head as product, send the battery limit (BL) by outlet 13 and go to back workshop section after pressure regulating system 14 voltage stabilizings, purified gas goes next step to carry the nitrogen device.Stripping gas removes compression section as reclaiming gas.
The hocket absorption, regenerative operation of eight adsorption towers can realize the continuous Separation ﹠ Purification of gas.
The transformation absorbed portion adopts the 8-1-4VPSA technological process, that is: have an adsorption tower to be in the state of charging absorption all the time in eight of device adsorption towers.Its absorption and regeneration technology process are by absorption, continuous four drop pressures, form against steps such as putting, vacuumize, continuous four boost pressures and product finally boost.
The course of work of adsorption tower is as follows successively:
1) adsorption process
Pressure is 0.9MPa (G), and temperature is that 30 ℃ oxidized tail gas enters the adsorption tower that is in adsorbed state at the bottom of tower
In (having 1 adsorption tower to be in adsorbed state all the time).Under the selection successively of multiple adsorbent absorption, CmHn wherein
Be adsorbed etc. foreign gas, the gas that is not adsorbed flows out from cat head, sends the boundary after the pressure regulating system voltage stabilizing
The district.
When the mass-transfer zone forward position that is adsorbed impurity (being called the absorption forward position) arrives a certain position of bed outlet reservation section,
Unstripped gas inlet valve and the product gas outlet valve of turning off this adsorption tower stop absorption.Adsorbent bed begins to change over to regenerated
Journey.
2) drop pressure process
After adsorption process finishes, along the absorption direction nitrogen of the elevated pressures in the tower is put into other and finish again
The process of the lower pressure adsorption tower of giving birth to, this process is not only the step-down process, reclaims the mistake of bed dead space nitrogen especially
Journey, this flow process have comprised continuous drop pressure process altogether 4 times, thereby can guarantee the abundant recovery of nitrogen.
3) the contrary journey of letting slip
After the drop pressure process finished, the absorption forward position had reached the bed outlet.At this moment, will inhale against the absorption direction
Attached pressure tower is down to about 0.02Mpa, and the impurity that be adsorbed this moment begins to desorb in a large number from adsorbent, and is contrary
Put stripping gas and advance the stripping gas surge tank.
4) vacuum
Let slip after journey finishes contrary, regenerated completely for making adsorbent, with vavuum pump against the absorption direction to inhaling
Attached bed vacuumizes, and makes adsorbent be able to thorough regeneration, the air-breathing stripping gas blending tank that enters of Vacuum solutions.
5) boost pressure process
After vacuum is finished, use the elevated pressures nitrogen from other adsorption tower successively this adsorption tower to be carried out
Boost, this process is corresponding with the drop pressure process, is not only the process of boosting, and reclaims other tower especially
The process of bed dead space nitrogen, this flow process have comprised continuous four boost pressure processes altogether.
6) the product gas lift is pressed process
After four boost pressure processes are finished, in order adsorption tower can be switched to reposefully adsorb and to protect next time
The card product purity does not fluctuate in this course, need slowly and reposefully use product nitrogen by the control valve that boosts
Gas rises to adsorptive pressure with adsorption column pressure.
Adsorption tower has just been finished complete " adsorption-regeneration " circulation after this process, is absorption next time again
Get ready.
Two, stripping gas compression section
The recovery stripping gas that transformation absorption comes is through dividing flow container 7 separatory laggard compressor 8, be forced into 1.25MPa, three grades of coolings, separatory by compressor 8 reclaim the liquid phase organic matter (cyclohexane, cyclohexanone, cyclohexanol etc.) in the Cyclohexanone Production oxidized tail gas, the gas of going out from compressor 8 enters back branch flow container 10 through cooling driers 9, further reclaims the organic matter (cyclohexane) in the gas.The organic matter that obtains reclaims liquid and enters recovery flow container 6(Fig. 1 with the organic matter that reclaims through minute flow container 7), compile recycling.
The gas that divides flow container 10 tops to go out from the back is back to air inlet pipe 11 entrances of this device (Fig. 1), carries out the transformation absorption process again, forms closed cycle.The gas that divides flow container 10 tops to go out from the back not only can further purify, and can blow dead space gas in the adsorption tower as power.
Cyclohexane oxidation exhaust treatment system of the present invention, comprise the adsorption tower 1, stripping gas surge tank 5, stripping gas blending tank 4, branch flow container 7, compressor 8, cooling driers 9 and the back branch flow container 10 that connect successively, adsorption tower also connects air inlet pipe 11 and outlet 13, adsorption tower also connects stripping gas blending tank 4 through vavuum pump 2, cooler 3 successively, divides flow container, compressor, cooling driers and back to divide the bottom of flow container to be connected jointly and reclaims flow container 6.
The back divides gas outlet, flow container 10 top to connect air inlet pipe 11.
Divide flow container and back to divide the gas outlet, top of flow container also to be connected blow-down pipe 12.
Gas outlet, adsorption tower top connects outlet 13 through pressure regulating system 14.
The adsorption tower top also connects blow-down pipe 12.
Claims (5)
1. cyclohexane oxidation exhaust treatment system, it is characterized in that: comprise the adsorption tower, stripping gas surge tank, stripping gas blending tank, branch flow container, compressor, cooling driers and the back branch flow container that connect successively, adsorption tower also connects air inlet pipe and outlet, adsorption tower also connects the stripping gas blending tank through vavuum pump, cooler successively, divides flow container, compressor, cooling driers and back to divide the bottom of flow container to be connected the recovery flow container jointly.
2. cyclohexane oxidation exhaust treatment system according to claim 1 is characterized in that: gas outlet, separatory tank top, back connection air inlet pipe.
3. cyclohexane oxidation exhaust treatment system according to claim 1 and 2 is characterized in that: divide flow container and back to divide the gas outlet, top of flow container also to be connected blow-down pipe.
4. cyclohexane oxidation exhaust treatment system according to claim 1 and 2, it is characterized in that: gas outlet, adsorption tower top connects outlet through pressure regulating system.
5. cyclohexane oxidation exhaust treatment system according to claim 4, it is characterized in that: the adsorption tower top also connects blow-down pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320018735 CN203108394U (en) | 2013-01-15 | 2013-01-15 | Cyclohexane oxidized tail gas treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320018735 CN203108394U (en) | 2013-01-15 | 2013-01-15 | Cyclohexane oxidized tail gas treatment system |
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| CN203108394U true CN203108394U (en) | 2013-08-07 |
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| CN 201320018735 Expired - Fee Related CN203108394U (en) | 2013-01-15 | 2013-01-15 | Cyclohexane oxidized tail gas treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055660A (en) * | 2013-01-15 | 2013-04-24 | 山东吉安化工有限公司 | Method and system for treating cyclohexane oxidation tail gas |
| CN105413227A (en) * | 2015-12-17 | 2016-03-23 | 湖南省中达换热装备有限公司 | Material deep-cooling recoverer and recovery method |
-
2013
- 2013-01-15 CN CN 201320018735 patent/CN203108394U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055660A (en) * | 2013-01-15 | 2013-04-24 | 山东吉安化工有限公司 | Method and system for treating cyclohexane oxidation tail gas |
| CN103055660B (en) * | 2013-01-15 | 2015-04-22 | 山东吉安化工有限公司 | Method and system for treating cyclohexane oxidation tail gas |
| CN105413227A (en) * | 2015-12-17 | 2016-03-23 | 湖南省中达换热装备有限公司 | Material deep-cooling recoverer and recovery method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20140115 |