CN206783563U - The system that a kind of cyclohexane oxidation of green energy conservation prepares cyclohexanone - Google Patents
The system that a kind of cyclohexane oxidation of green energy conservation prepares cyclohexanone Download PDFInfo
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- CN206783563U CN206783563U CN201720185418.3U CN201720185418U CN206783563U CN 206783563 U CN206783563 U CN 206783563U CN 201720185418 U CN201720185418 U CN 201720185418U CN 206783563 U CN206783563 U CN 206783563U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses the system that a kind of cyclohexane oxidation of green energy conservation prepares cyclohexanone, the system, including reaction unit (1) and gases at high pressure EGR (2), cyclohexane feed tank field (A) is connected by pipeline with reaction unit, reaction unit is connected by pipeline with gases at high pressure EGR, the discharge pipe of gases at high pressure EGR is connected after converging with the feed pipe of oxygen tank field (B) with reaction unit, and reaction unit is connected by pipeline with rear centrifugal station (C).System of the present utility model, after directly circulation compression being carried out to reacted high pressure exhaust gas without pressure release, reaction system is reentered after being mixed with the oxygen and air of arbitrary proportion, take full advantage of the overbottom pressure of tail gas, compressor only needs to provide a small amount of energy consumption of circulation of tail gas, the significantly less energy consumption of compressor, there are the outstanding advantages such as flow is simple, emission-free discharge is low with energy consumption.
Description
Technical field
It the utility model is related to the system that a kind of cyclohexane oxidation prepares cyclohexanone.
Background technology
Cyclohexanone is the main intermediate for preparing caprolactam, adipic acid, and prepares the main of various vinyl paints
Raw material, and it is used as the solvent of many high molecular polymers extensively.Therefore, cyclohexanone is in the side such as organic chemical industry, coatings industry
Face suffers from extremely important effect.Cyclohexane liquid-phase oxidation method is to prepare cyclohexanone method the most universal, accounts for cyclohexanone
More than the 90% of production technology.This method uses oxygen-containing gas as oxidant, in higher temperature (80-165 DEG C) and pressure (about
Oxidation reaction is carried out under 1.2MPa).Due to containing inert component in oxygen-containing gas, satisfied after oxidation in tail gas by reaction mass
With, it is necessary to tail gas carry out organic component recovery and gas purification, with qualified discharge.The processing method of this general tail gas is
Tail gas is reclaimed into the components such as most of useful hexamethylene and cyclohexanol, the tail gas after processing by condensation liquefaction and spray-absorption
In containing nitrogen about 97%, oxygen about 2%, organic component about 0.45%, pressure 1.1-1.2Mpa, 3-4 DEG C of temperature.100000 tons/
The exhaust emissions amount about 16000-20000Nm3/h of the cyclohexanone production apparatus in year, tail is large-minded and pressure is higher, is directly vented
Mass energy and resource can be wasted and certain influence is produced to environment.
These tail gas after handling are sent into flare system and burnt by method general at present, Chinese patent
Tail gas is carried out by entering flare system after direct heat exchange tower, scrubbing tower and tail gas absorber after CN201593027U will react
Burning, the rate of recovery of hexamethylene is this method increase, but flare system generally requires addition combustion adjuvant and noble metal catalyst, if
Standby investment is larger, and fire retardant consumption is big, and operating cost is high, and although this way reduces the discharge of organic matter, but adds very
More times of CO2 emission, organic matter can not be reclaimed all.
The conventional method of another kind is absorption, and Chinese patent CN101306293A, CN103055655A etc. uses activated carbon
Or the adsorbent such as silica-rich zeolite absorption organic principle, then entered by reuse after the desorption and regenerations such as steam or nitrogen, desorption gas
One step processing recovery organic component is directly entered reaction system.Although this method absorption efficiency is high, the organic matter rate of recovery is high,
Because this method desorption needs substantial amounts of energy consumption, and adsorbent has certain life-span, will consolidate afterwards as new more than the life-span
Body discarded object, its investment cost and operating cost are all considerable, govern the commonly used of this method.
There are elevated pressures for tail gas after reaction, Chinese patent CN204051046U proposes a kind of cyclohexane oxidation tail
The device of gas energy utilization, organic solvent recovery and gas component separation and recovery.This method carries out separation, expansion to tail gas
Acting, UF membrane etc. realize gas-liquid separation, not only reclaim the organic matter in tail gas and are done work using the pressure energy of tail gas, are also separated
The nitrogen in tail gas is purified, realizes that resources circulation uses.But this method is also larger due to the more investment of equipment and operating cost.
In summary, at present all there is investment cost in tail gas treatment process and operating cost is high.And use oxygenous
The gas of oxidant needs to be compressed to operating pressure 1.1-1.2MPa, and decrement is big, operating cost is very high, and energy-saving potentiality are huge
Greatly.
Utility model content
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided prepared by a kind of cyclohexane oxidation of green energy conservation
The system of cyclohexanone.
The technical solution of the utility model is summarized as follows：
The system that a kind of cyclohexane oxidation of green energy conservation prepares cyclohexanone, including reaction unit 1 and gases at high pressure circulation
Device 2, cyclohexane feed tank field A are connected by pipeline with reaction unit, and reaction unit is filled by pipeline and gases at high pressure circulation
Connection is put, discharge pipe and the oxygen tank field B feed pipe of gases at high pressure EGR converge to be connected with reaction unit afterwards, instead
Device is answered to be connected by pipeline with rear centrifugal station C.
Reaction unit 1 is multistage cyclohexane oxidation system, photocatalytic oxidation reactor, micro- reaction system, and tubulose is anti-
The reaction system for answering device to be combined with solid-liquid UF membrane, the tower reaction system of sieve plate or reactive distillation reaction system.
Gases at high pressure EGR 2 be centrifugal compressor, gas phase screw compressor, reciprocating compressor one kind or
Multiple combinations.
The system that the cyclohexane oxidation of another green energy conservation prepares cyclohexanone, including reaction unit 11 and gases at high pressure follow
Loop device 12, cyclohexane feed tank field A1 are connected by pipeline with reaction unit, and the reaction unit passes through pipeline and high pressure gas
Body circulation device 12 connects, the discharge pipe mixing with the air and oxygen of any volume ratio all the way of gases at high pressure EGR
Gas tank field B1 feed pipe is connected after converging with reaction unit, and the discharge pipe another way of gases at high pressure EGR is with after
Tail-gas after treatment apparatus D1 connections, reaction unit are connected by pipeline with rear centrifugal station C1.
Reaction unit 11 is multistage cyclohexane oxidation system, photocatalytic oxidation reactor, micro- reaction system, and tubulose is anti-
The reaction system for answering device to be combined with solid-liquid UF membrane, the tower reaction system of sieve plate or reactive distillation reaction system.
Gases at high pressure EGR 12 is centrifugal compressor, gas phase screw compressor, one kind of reciprocating compressor
Or multiple combinations.
The advantages of the utility model is：
1. the system that the cyclohexane oxidation of green energy conservation of the present utility model prepares cyclohexanone, to reacted high pressure exhaust gas
After directly carrying out circulation compression without pressure release, reaction system is reentered after being mixed with the oxygen and air of arbitrary proportion, is had
There is the advantages that flow is simple, and emission-free or tail gas amount is few.
2. the utility model takes full advantage of the overbottom pressure of high pressure exhaust gas, compressor, which need to only provide, meets a small amount of of circulation of tail gas
Energy consumption is that recycling for tail gas can be achieved, and substantially reduces the energy consumption of compressor, has saved production cost.
Brief description of the drawings
Fig. 1 is the system schematic that a kind of cyclohexane oxidation of green energy conservation prepares cyclohexanone.
Fig. 2 is that the cyclohexane oxidation of another green energy conservation prepares the system schematic of cyclohexanone.
Embodiment
The utility model is further described below by drawings and examples.
The system that a kind of cyclohexane oxidation of green energy conservation prepares cyclohexanone, see Fig. 1, including reaction unit 1 and high pressure gas
Body circulation device 2, cyclohexane feed tank field A are connected by pipeline with reaction unit, and reaction unit passes through pipeline and gases at high pressure
EGR connects, and the discharge pipe of gases at high pressure EGR converges rear and reaction unit with oxygen tank field B feed pipe
Connection, reaction unit are connected by pipeline with rear centrifugal station C.
Reaction unit 1 can be any suitable reaction unit known in the art, including the multistage that industry is commonly used
Cyclohexane oxidation system, photocatalytic oxidation reactor, micro- reaction system disclosed in Chinese patent CN101293810A, China
The reaction system that 202136966U tubular reactors disclosed in patent are combined with solid-liquid UF membrane, Chinese patent
The tower reaction system of sieve plate disclosed in CN10460392A, reactive distillation reaction system disclosed in Chinese patent CN102766032A
Deng.
Gases at high pressure EGR can be any type of compressibility known in the art, including centrifugal compressor
One or more combinations of machine, gas phase screw compressor, reciprocating compressor.
The system that the cyclohexane oxidation of second of green energy conservation prepares cyclohexanone, see Fig. 2, including reaction unit 11 and high pressure
Gas-recycling plant 12, cyclohexane feed tank field A1 are connected by pipeline with reaction unit, the reaction unit by pipeline with
Gases at high pressure EGR 12 connects, the discharge pipe of the gases at high pressure EGR air and oxygen with any volume ratio all the way
Mixed gas tank field B1 feed pipe converge after be connected with reaction unit, the discharge pipe of gases at high pressure EGR is another
Road is connected with tail-gas after treatment apparatus D1, and reaction unit is connected by pipeline with rear centrifugal station C1.
Reaction unit 11 can be any suitable reaction unit known in the art, including the multistage that industry is commonly used
Cyclohexane oxidation system, photocatalytic oxidation reactor, micro- reaction system disclosed in Chinese patent CN101293810A, China
The reaction system that 202136966U tubular reactors disclosed in patent are combined with solid-liquid UF membrane, Chinese patent
The tower reaction system of sieve plate disclosed in CN10460392A, reactive distillation reaction system disclosed in Chinese patent CN102766032A
Deng.
Gases at high pressure EGR 12 can be any type of compressibility known in the art, including centrifugal compressor
One or more combinations of machine, gas phase screw compressor, reciprocating compressor.
Embodiment 1
A kind of method that cyclohexane oxidation of green energy conservation prepares cyclohexanone, comprises the following steps：
(1) system that cyclohexanone is prepared using the cyclohexane oxidation of the first green energy conservation；See Fig. 1
(2) hexamethylene is passed through micro- reaction system from cyclohexane feed tank field A, while oxygen tank field B oxygen is passed through
Micro- reaction system, reacted gas phase is after centrifugal compressor compresses with entering again after the oxygen mix from oxygen tank field B
Reaction system in a subtle way, reacted liquid phase enter rear centrifugal station C.
Hexamethylene containing catalyst boric acid can be substituted hexamethylene by the present embodiment.
Catalyst can be any suitable hexamethylene catalyst known in the art, including the soluble-salt of cobalt or cobalt and
Its mixture, boric acid or metaboric acid, the photochemical catalytic oxidation catalyst doped with rare earth element or Tb TiO2.
Embodiment 2
A kind of method that cyclohexane oxidation of green energy conservation prepares cyclohexanone, comprises the following steps：
(1) system that cyclohexanone is prepared using the cyclohexane oxidation of the first green energy conservation；
(2) by the hexamethylene containing catalyst cobaltous octadecanate, from cyclohexane feed tank field, it is anti-to be passed through multistage cyclohexane oxidation by A
System is answered, while oxygen tank field B oxygen is passed through multistage cyclohexane oxidation system, reacted gas phase is through gas phase screw rod
With reentering multistage cyclohexane oxidation system after the oxygen mix from oxygen tank field B after formula compressor compresses, react
Liquid phase afterwards enters rear centrifugal station C.
Examples 1 and 2 do not have tail gas generation.
Photoactivation oxidation reactor, the reaction system that tubular reactor is combined with solid-liquid UF membrane, sieve plate are tower anti-
Answer system or reactive distillation reaction system replace the multistage cyclohexane oxidation system of the present embodiment, other same the present embodiment,
Can green energy conservation cyclohexanone prepared by cyclohexane oxidation.
Embodiment 3
The method that the cyclohexane oxidation of second of green energy conservation prepares cyclohexanone, comprises the following steps：
(1) system that cyclohexanone is prepared using the cyclohexane oxidation of second of green energy conservation；See Fig. 2
(2) by the hexamethylene containing catalyst boric acid, from cyclohexane feed tank field, A1 is passed through multistage cyclohexane oxidation
System 11, while the mixed gas of tank field B1 air and oxygen (oxygen volume content 93%) is passed through multistage cyclohexane oxidation
Reaction system, reacted gas phase are divided two-way after the compression of reciprocating compressor 12, mixed all the way with from the above-mentioned of tank field B1
Multistage cyclohexane oxidation system is reentered after gas mixing, another way is passed through rear exhaust gas processing device D1, reacted
Liquid phase enters rear centrifugal station C1.
The present embodiment only has a small amount of tail gas, and tail gas amount, which is only about, is passed through air and the 7% of the oxygen mixture scale of construction.
Photoactivation oxidation reactor, the reaction system that tubular reactor is combined with solid-liquid UF membrane, sieve plate are tower anti-
Answer system or reactive distillation reaction system replace the multistage cyclohexane oxidation system of the present embodiment, other same the present embodiment,
Can green energy conservation cyclohexanone prepared by cyclohexane oxidation.
Claims (6)
1. the system that a kind of cyclohexane oxidation of green energy conservation prepares cyclohexanone, including reaction unit (1) and gases at high pressure circulation
Device (2), it is characterized in that cyclohexane feed tank field (A) is connected by pipeline with reaction unit, reaction unit passes through pipeline and height
Press gas-recycling plant connection, the discharge pipe of gases at high pressure EGR and the feed pipe of oxygen tank field (B) converge after with
Reaction unit is connected, and reaction unit is connected by pipeline with rear centrifugal station (C).
2. system according to claim 1, it is characterized in that the reaction unit (1) is multistage cyclohexane oxidation system
System, photocatalytic oxidation reactor, micro- reaction system, the reaction system that tubular reactor is combined with solid-liquid UF membrane, sieve-plate tower
Formula reaction system or reactive distillation reaction system.
3. system according to claim 1, it is characterized in that the gases at high pressure EGR (2) be centrifugal compressor,
One or more combinations of gas phase screw compressor, reciprocating compressor.
4. the system that a kind of cyclohexane oxidation of green energy conservation prepares cyclohexanone, including reaction unit (11) and gases at high pressure circulation
Device (12), it is characterized in that cyclohexane feed tank field (A1) is connected by pipeline with reaction unit, reaction unit by pipeline with
Gases at high pressure EGR (12) connects, the discharge pipe of the gases at high pressure EGR air and oxygen with any volume ratio all the way
The feed pipe of the mixed gas tank field (B1) of gas is connected after converging with reaction unit, another way and tail-gas after treatment apparatus (D1)
Connection, reaction unit are connected by pipeline with rear centrifugal station (C1).
5. system according to claim 4, it is characterized in that the reaction unit (11) is multistage cyclohexane oxidation system
System, photocatalytic oxidation reactor, micro- reaction system, the reaction system that tubular reactor is combined with solid-liquid UF membrane, sieve-plate tower
Formula reaction system or reactive distillation reaction system.
6. system according to claim 4, it is characterized in that the gases at high pressure EGR (12) be centrifugal compressor,
One or more combinations of gas phase screw compressor, reciprocating compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720185418.3U CN206783563U (en) | 2017-02-28 | 2017-02-28 | The system that a kind of cyclohexane oxidation of green energy conservation prepares cyclohexanone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720185418.3U CN206783563U (en) | 2017-02-28 | 2017-02-28 | The system that a kind of cyclohexane oxidation of green energy conservation prepares cyclohexanone |
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| Publication Number | Publication Date |
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| CN206783563U true CN206783563U (en) | 2017-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720185418.3U Active CN206783563U (en) | 2017-02-28 | 2017-02-28 | The system that a kind of cyclohexane oxidation of green energy conservation prepares cyclohexanone |
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| Country | Link |
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| CN (1) | CN206783563U (en) |
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- 2017-02-28 CN CN201720185418.3U patent/CN206783563U/en active Active
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