CN209144047U - A kind of production of adjacent or terephthalate esterification and refining system - Google Patents
A kind of production of adjacent or terephthalate esterification and refining system Download PDFInfo
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- CN209144047U CN209144047U CN201821649991.6U CN201821649991U CN209144047U CN 209144047 U CN209144047 U CN 209144047U CN 201821649991 U CN201821649991 U CN 201821649991U CN 209144047 U CN209144047 U CN 209144047U
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Abstract
The utility model discloses a kind of production of adjacent or terephthalate esterification and refining systems, including esterification portion and finish；The esterification portion includes interior reaction kettle of the esterification, esterification column, esterification condensator, alcohol-water separation device, tail gas tank and the recycle alcohol tank for setting rabbling mechanism；The finish sets post-processing kettle, treating column, post-processing condenser, alcohol receiving tank, oil separator, initial filtrator and fine filter that rabbling mechanism is connected with the reaction kettle of the esterification in including；In esterification and subtractive process, alcohol can be sufficiently recycled, the operating cost of esterification is reduced.
Description
Technical field
The utility model relates to chemical technology field, more particularly to a kind of adjacent or terephthalate production esterification and
Refining system.
Background technique
Adjacent (to) phthalic acid ester is reacted under catalyst and hot conditions by phthalic anhydride and corresponding alcohol
It arrives, equivalent esterification occurs for a carboxylic acids and a molecule alcohol, and when reaching reaction balance, only 2/3 molecule ester is generated.To make
The concentration of ester increases, can excessive addition alcohol, so in the production process to this dioctyl phthalate monooctyl ester, terephthalic acid (TPA) and octanol
Ratio be 1:2.48 (wt%), while can use octanol and water can be formed azeotropic mixture (99.1 DEG C of boiling point) characteristic removing it is anti-
The water that should be generated.Catalyst adding proportion is the 1 ‰ of terephthalic acid (TPA) quality.Subtractive process needs to remove alcohol, water in product
And phthalic acid ester is filtered.
In esterification reaction process, due to the addition of alcohol excess, subsequent alcohol separation is recycled and is particularly important, existing skill
In art, the reuse ratio of alcohol is low, causes the alcohol in alcohol separation process that cannot be recycled completely, and there are asking for high production cost
Topic.
Utility model content
The purpose of this utility model is the problem low for alcohol reuse ratio existing in the prior art, and provides a kind of neighbour
Or terephthalate production esterification and refining system, the alcohol refined in last handling process is Ke Xunhuanliyong, energy conservation and environmental protection, place
Manage simple process, save the cost.
It is for technical solution used by realization the purpose of this utility model:
A kind of production of adjacent or terephthalate esterification and refining system, including esterification portion and finish；
The esterification portion include in set the reaction kettle of the esterification of rabbling mechanism, esterification column, esterification condensator, alcohol-water separation device,
Tail gas tank and recycle alcohol tank；
The top of the reaction kettle of the esterification is equipped with the phthalic anhydride feed mechanism for supplying phthalic anhydride, and the esterification is anti-
It answers and is additionally provided with coupled logical low-pressure nitrogen delivery pipe, alcohol delivery pipe and catalyst transport, the catalysis at the top of kettle
The other end of agent delivery pipe is connected with the bottom end of catalyst storage tank, and the circulation of concentric setting is equipped in the reaction kettle of the esterification
Water inner coil pipe and saturated vapor inner coil pipe, the reaction kettle of the esterification outer wall are equipped with the outer coil pipe of recirculated water and saturated vapor external disk
Pipe, the bottom end of the reaction kettle of the esterification are equipped with coupled logical discharge pipe, and esterification discharging is equipped on the discharge pipe
Pump；
The esterification column is arranged in the top of the reaction kettle of the esterification, the least significant end of the esterification column pass through respectively pipeline with
The reaction kettle of the esterification is connected with the discharge pipe, and the top of the reaction kettle of the esterification passes through pipeline and the esterification column
Middle and lower part is connected；
The top of the esterification column is connected by pipeline with the feed inlet esterification column of the esterification condensator, the ester
The condensate outlet for changing condenser is connected with the top inlet of the alcohol-water separation device by pipeline, and the esterification condensator is not
Solidifying gas outlet is connected with the top inlet of the tail gas tank by pipeline；
The bottom end of the alcohol-water separation device passes through pipeline respectively and is used to recycle the alcohol water recovery tank of alcohol water and for recycling
It is connected at the top of the recycle alcohol tank of alcohol；
The top and the alcohol-water separation device that the bottom end of the recycle alcohol tank passes through recycle alcohol return pipe and the esterification column
Top be connected, the recycle alcohol return pipe be equipped with recycle alcohol reflux pump；
The finish include in set the post-processing kettle of rabbling mechanism, treating column, post-processing condenser, alcohol receiving tank, every
Oil sump, initial filtrator and fine filter；
The inside of the post-processing kettle is equipped with concentric steam pipe coil and circulation water coil, described to recycle the two of water coil
End respectively with circulation upper hose and recirculation return pipe be connected, the both ends of the steam pipe coil respectively with steam pipeline and condensate
Delivery pipe is connected, and bottom is equipped with steam and adds pipeline, the steam addition pipeline and steam adding tube in the post-processing kettle
Road is connected, and the post-processing kettle top portion is equipped with liquid and adds pipeline, liquid addition pipeline respectively with hot water conveying pipe and
Lye delivery pipe is connected, and the top of the post-processing kettle is additionally provided with coupled logical thick ester coming expects pipe and low pressure nitrogen tracheae,
The other end of the thick ester coming expects pipe is connected with the reaction kettle of the esterification；
The top of the post-processing kettle is connected with the least significant end of the treating column and middle and lower part by pipeline respectively, described
The top for the treatment of column is connected by pipeline with the steam inlet of the post-processing condenser, the liquid of the post-processing condenser
Outlet connects alcohol receiving tank by pipeline, and the top of the alcohol receiving tank connects vacuum pump by pipeline；
The bottom of the post-processing kettle is equipped with discharge nozzle, and the discharge nozzle is entered by first pipe and the oil separator top
Mouth is connected, and the bottom end outlet of the oil separator connects wastewater disposal basin, and the discharge nozzle passes through second pipe and initial filtrator side
Entrance be connected, the other side of the initial filtrator outlet pass through pipeline and the entrance phase on the side wall of the fine filter
Connection, the second pipe are equipped with filter pressing pump, and the bottom end outlet of the fine filter is connected by pipeline with finished pot.
In the above-mentioned technical solutions, the bottom end outlet of the alcohol receiving tank is connected to the recycle alcohol tank by pipeline, described
The top of alcohol receiving tank is connected by pipeline with the alcohol-water separation device.
In the above-mentioned technical solutions, the outside of the circulation water coil is arranged in the steam pipe coil, and the post-processing is cold
Condenser is circulating water condensing.
In the above-mentioned technical solutions, the top of the oil separator is connected by pipeline with the top of the post-processing kettle.
In the above-mentioned technical solutions, the initial filtrator is arranged right below slag-drip opening, sets immediately below the slag-drip opening
There is the slag car, the number of the filter pressing pump is two and two filter pressing pumps are arranged in parallel on the second pipe, the prefiltration
Device passes through pipeline with the top of fine filter and connects compressed air source.Compressed air can promote the progress of filter process.It is described
The discharge port of initial filtrator and fine filter passes through pipeline and is connected with the top for post-processing kettle.First mistake before filter deslagging
The material of filter is pushed back to post-processing kettle deslagging again.
In the above-mentioned technical solutions, the top of the tail gas tank pass through respectively the top of pipeline and the alcohol-water separation device with
And the alcohol water recovery tank is connected, the top and bottom end of the tail gas tank pass through pipeline respectively and are connected with the recycle alcohol tank
It is logical.
In the above-mentioned technical solutions, the middle and upper part of the esterification column and the middle and upper part of alcohol-water separation device pass through pipeline with
Alcohol receiving tank in last handling process is connected, and the bottom end of the esterification column is equipped with coupled logical low-pressure nitrogen pipeline, institute
It states and is connected with and low-pressure nitrogen pipeline on the pipeline that the bottom of esterification column is connected with the discharge pipe.
In the above-mentioned technical solutions, the outside of the recirculated water inner coil pipe is arranged in the saturated vapor inner coil pipe, described
The both ends of recirculated water inner coil pipe are connected with recirculated water upper hose and recirculated water return pipe respectively, and the two of the outer coil pipe of the recirculated water
End is connected with recirculated water upper hose and recirculated water return pipe respectively, and the both ends of the outer coil pipe of the saturated vapor are steamed with saturation respectively
Steam pipe road is connected with condensate pipeline.
In the above-mentioned technical solutions, the top of the catalyst storage tank is equipped with coupled logical exhausting pipeline, catalyst
Add pipeline and low pressure nitrogen tracheae.
In the above-mentioned technical solutions, the phthalic anhydride feed mechanism includes that the solid on the reaction kettle of the esterification top is arranged in add
The bottom end discharge port of feed bin, solid feeding chamber is connected with the top of reaction kettle of the esterification by pipeline, the solid feeding chamber
Top left side is equipped with feeding port, and the top of the feeding port is equipped with electric block, and the top right side of the solid feeding chamber is equipped with
For recycling the bag filter of dust in solid feeding chamber.
Compared with prior art, the utility model has the beneficial effects that
1. the setting of esterification condensator, alcohol-water separation device and tail gas tank in esterification portion, can effectively increase the separation of alcohol again
Utilization rate effectively reduces production cost.
2. charging system setting is reasonable convenient for charging.
3. system run all right, failure rate is low.
4. the alcohol refined in last handling process is Ke Xunhuanliyong, recycle to adjacent or terephthalate production production system
In system, energy conservation and environmental protection, treatment process is simple, save the cost.
5. the oil in oil separator mutually turns again to post-processing kettle and recycles, while playing the role of save the cost.
6. double-stage filtering structure can effectively improve filter efficiency, first active carbon is filtered out, then essence filtering again, obtains
Finished product.
Detailed description of the invention
Fig. 1 show the structural schematic diagram of esterification system.
Fig. 2 show the structural schematic diagram of refining system.
In figure: 1- reaction kettle of the esterification, 2- low-pressure nitrogen delivery pipe, 3- esterification column, 4- catalyst storage tank, 5- low-pressure nitrogen
It manages, 6- catalyst addition pipeline, 7- exhausting pipeline, 8- saturated vapor pipeline, 9- low-pressure nitrogen pipeline, water on 10- recirculated water
Pipe, 11- bag filter, 12- electric block, 13- alcohol delivery pipe, 14- alcohol delivery pipe, 15- are esterified discharging pump, 16- esterification
Tower, 17- recycle alcohol tank, 18- recirculated water return pipe, 19- esterification condensator, 20- alcohol-water separation device, 21- tail gas tank, 22- circulation
Alcohol reflux pump, 23- condensate pipeline, 24- low-pressure nitrogen pipeline, 25- discharge pipe, 26- alcohol water recovery tank, 27- alcohol receiving tank.
1'- post-processes kettle, 2'- steam pipeline, and 3'- recycles upper hose, and 4'- steam adds pipeline, 5'- delivery
Pipe, 6'- lye delivery pipe, 7'- low pressure nitrogen tracheae, the thick ester coming expects pipe of 8'-, 9'- first pipe, 10'- discharge nozzle, 11'- circulation
Return pipe, 12'- condensate delivery pipe, 13'- vacuum pump, 14'- treating column, 15'- post-processing condenser, 16'- alcohol receiving tank,
18'- filter pressing pump, 19'- initial filtrator, 20'- compressed air source, 21'- fine filter, 22'- oil separator, 23'- second pipe,
The 24'- slag car, 25'- finished pot.
Specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place
The specific embodiment of description is only used to explain the utility model, is not used to limit the utility model.
A kind of production of adjacent or terephthalate esterification and refining system, including esterification portion and finish；
The esterification portion includes interior reaction kettle of the esterification 1, esterification column 16, esterification condensator 19, the alcohol moisture for setting rabbling mechanism
From device 20, tail gas tank 21 and recycle alcohol tank 17；
The top of the reaction kettle of the esterification 1 is equipped with the phthalic anhydride feed mechanism for supplying phthalic anhydride, the esterification
The top of reaction kettle 1 is additionally provided with coupled logical low-pressure nitrogen delivery pipe 2, alcohol delivery pipe 14 and catalyst transport, institute
The other end for stating catalyst transport is connected with the bottom end of catalyst storage tank 4, is equipped with concentric set in the reaction kettle of the esterification 1
The recirculated water inner coil pipe and saturated vapor inner coil pipe set, 1 outer wall of reaction kettle of the esterification are equipped with the outer coil pipe of recirculated water and saturation
The outer coil pipe of steam, the bottom end of the reaction kettle of the esterification 1 are equipped with coupled logical discharge pipe 25, pacify on the discharge pipe 25
Equipped with esterification discharging pump 15；
The top of the reaction kettle of the esterification 1 is arranged in the esterification column 16, and the least significant end of the esterification column 16 passes through respectively
Pipeline is connected with the reaction kettle of the esterification 1 and the discharge pipe 25, and the top of the reaction kettle of the esterification 1 passes through pipeline and institute
The middle and lower part for stating esterification column 16 is connected (effect of esterification column 16 is that evaporation gas phase and recycle alcohol liquid phase exchange heat)；
The top of the esterification column 16 is connected by pipeline with the feed inlet esterification column 16 of the esterification condensator 19,
The condensate outlet of the esterification condensator 19 is connected with the top inlet of the alcohol-water separation device 20 by pipeline, the esterification
The fixed gas outlet of condenser 19 is connected with the top inlet of the tail gas tank 21 by pipeline；
The bottom end of the alcohol-water separation device 20 pass through respectively pipeline with for recycle alcohol water alcohol water recovery tank 26 and be used for
The top for recycling the recycle alcohol tank 17 of alcohol is connected；
The top and the alcohol moisture that the bottom end of the recycle alcohol tank 17 passes through recycle alcohol return pipe and the esterification column 16
Top from device 20 is connected, and the recycle alcohol return pipe is equipped with recycle alcohol reflux pump 22；
The finish sets the post-processing kettle 1' of rabbling mechanism, treating column 14', post-processing condenser 15', alcohol and connects in including
Closed cans 16', oil separator 22', initial filtrator 19' and fine filter 21'；
The inside of the post-processing kettle 1' is equipped with concentric steam pipe coil and circulation water coil, the circulation water coil
Both ends are connected with circulation upper hose 3' and recirculation return pipe 11' respectively, and the both ends of the steam pipe coil are conveyed with steam respectively
Pipe 2' is connected with condensate delivery pipe 12', and bottom is equipped with steam and adds pipeline, the steam adding tube in the post-processing kettle 1'
Line is connected with steam addition pipeline 4', and liquid is equipped at the top of the post-processing kettle 1' and adds pipeline, the liquid adds pipeline
It is connected respectively with hot water conveying pipe 5' and lye delivery pipe 6', the top of the post-processing kettle 1' is additionally provided with coupled logical
Thick ester coming expects pipe 8 and low pressure nitrogen tracheae 7', the other end of the thick ester coming expects pipe 8 are connected with the reaction kettle of the esterification 1；
The top of the post-processing kettle 1' is connected with the least significant end of the treating column 14' and middle and lower part by pipeline respectively
Logical, the top of the treating column 14' is connected by pipeline with the steam inlet of the post-processing condenser 15', is located after described
The liquid outlet for managing condenser 15' connects alcohol receiving tank 16' by pipeline, and the top of the alcohol receiving tank 16' is connected by pipeline
Meet vacuum pump 13'；
It is described post-processing kettle 1' bottom be equipped with discharge nozzle 10', the discharge nozzle 10' by first pipe 9' and it is described every
Oil sump 22' top inlet is connected, and the bottom end outlet of the oil separator 22' connects wastewater disposal basin, and the discharge nozzle 10' passes through the
Two pipeline 23' are connected with the entrance of the side initial filtrator 19', and the outlet of the other side of the initial filtrator 19' passes through pipeline
It is connected with the entrance on the side wall of the fine filter 21', the second pipe 23' is equipped with filter pressing pump 18', the essence mistake
The bottom end outlet of filter 21' is connected by pipeline with finished pot 25'.
Working method:
The utility model is suitable for DOTP (dioctyl terephthalate) and DPHP's (dipropylheptylphthalate)
Production, esterification reaction process, including esterification step and flash process.Including being carried out to this reaction process detailed by taking DPHP as an example
It illustrates.
Raw material phthalic anhydride is added to reaction kettle of the esterification 1 by phthalic anhydride feed mechanism, conveys the heptan to come with tank field alcohol delivery pipe 14
Alcohol is mixed, and is heated up with 4.2MPa middle pressure steam.Phthalic anhydride reacts in reaction kettle of the esterification 1 with enanthol generates the thick ester of DPHP,
To accelerate reaction, reaction forward being promoted to carry out in reaction process, it is added in right amount after reaching temperature index by catalyst storage tank 4
Catalyst-tetraisopropyl titanate.
Flash process:
Flash distillation purpose is after reaction to separate octanol excessive in system with thick ester.Flash process is divided into two steps
Carry out: the first step flashes naturally.Utilize waste heat in esterifying kettle, evaporation section octanol；Second step, system are (true under vacuum conditions
Null device is mounted in the post-processing purification apparatus being connected with this reaction system), remaining enanthol is removed, resulting gas
Phase enanthol is after condensing, into 20 settle and separate of alcohol-water separation device.Lower layer's water phase is discharged into alcohol water recovery tank 26, and upper layer octanol waits for water
After mutually emptying, 20 inside of alcohol-water separation device is retained in case feeding intake and recycling next time.It has part recycle alcohol and is trapped in alcohol water
In knockout drum, the alcohol flashed off under vacuum condition is eventually returned to recycle alcohol tank 17.
The thick ester generated is born by vacuum pump P-2009 by vacuum after reaching esterification terminal (acid value≤0.3mgKOH/g)
Pressure carries out flash process, deviates from the excessive enanthol in reaction process, this part alcohol excess can be used as recycle alcohol, for the production of lower batch
It recycles.
Subtractive process:
Thick ester after flash distillation is delivered to post-processing kettle 1' from esterifying kettle by dnockout pumps and carries out processing purification, and subtractive process includes
Neutralization step, washing step rush alcohol process, dry blowing process, adsorption filtration process.
After reaching post-processing kettle 1' by the thick ester of esterifying kettle conveying, cooled down first by recycling water coil, arrives technique
After Con trolling index, by lye delivery pipe 6' into lye, by hot water conveying pipe 5' into hot water, neutralization step is carried out, after stirring is stood
By neutralize into water exhaust via discharge nozzle 10', first pipe 9' into oil separator 22', oil separator 22' can be removed in waste water
Oily phase, be conducive to the reprocessing of waste water, again by hot water conveying pipe 5' into hot water carry out washing step, repeat stirring stand behaviour
After work, the water of washing step part is cut out via discharge nozzle 10', first pipe 9', sampling analysis index reach acid value≤
0.02mgKOH/g。
After neutralizing washing step qualification, it is passed through 2.0MPa heating steam and post-processing kettle is heated by steam pipe coil,
After reaching temperature index, starting vacuum pump 13' carries out rushing alcohol process by negative pressure of vacuum, and adds pipeline by steam and be passed through
0.6MPa direct steam further deviates from the enanthol contained in thick ester in treating column 14', and the enanthol in thick ester is via rear place
Enter in alcohol receiving tank 16' after the condensation of reason condenser and is recycled, touch the mark enanthol content≤0.02%, acid value≤
0.07mgKOH/g, rushing alcohol process terminates, and is transferred to dry blowing process.
Dry blowing process refers under negative pressure condition, stops low-pressure steam and is passed through, and using material waste heat after alcohol is rushed, steams material
In remaining moisture, reach Con trolling index moisture content≤0.1%, can enter adsorption filtration process.Moisture therein via
Recycle alcohol tank of the alcohol receiving tank 16' into adjacent or terephthalate esterification step cuts water.
After dry blowing is qualified, in order to make product reach defined standard, the product after dry blowing decolourized with activated carbon adsorption and
Filtering.By manually direct plungeing into active carbon in post-processing kettle, material and active carbon are sufficiently mixed by stirring, so
It is sent to afterwards with filter pressing pump 18' and slightly crosses initial filtrator 19' and carries out coarse filtration, sampling analysis qualified and without obvious activity breeze
Afterwards, net liquid flows into fine filter and carries out smart filtering, is sent into finished pot 25' through finished product pipeline, filter efficiency can be improved in double-stage filtering.
Embodiment 2
The present embodiment on the basis of embodiment 1, further optimizes each equipment of finish.
It is preferred that the bottom end outlet of the alcohol receiving tank 16' is connected to the recycle alcohol tank 17 by pipeline.With again
Secondary return in reaction kettle of the esterification 1 is recycled.The top of the alcohol receiving tank 16' passes through pipeline and the alcohol-water separation device phase
Connection.Carry out alcohol-water separation.
It is preferred that the outside of the circulation water coil, the post-processing condenser is arranged in the steam pipe coil
15' is circulating water condensing.Recirculated water cools down gaseous alcohol, it is made to be prepared as liquid phase, returns to sharp again in alcohol receiving tank 16'
With.
It is preferred that the top of the oil separator 22' is connected by pipeline with the top of the post-processing kettle 1'.
It is recycled so that the oil in oil separator 22' mutually turns again to post-processing kettle 1', saves raw material.
It is preferred that the initial filtrator 19''s is arranged right below slag-drip opening, the slag-drip opening is arranged right below
Slag car 24'.Slag car 24' is used to receive the active carbon of slag-drip opening discharge.The number of the filter pressing pump 18' is two and two pressures
Filter pump 18' is arranged in parallel on the second pipe 23', and two filter pressing pump 18' can play the role of " a preparation and a use ", once
One of them breaks down, and can enable another, guarantees the stability of system operation.
It is preferred that the initial filtrator 19', which passes through pipeline with the top of fine filter 21', connects compressed air
Source 20'.Compressed air can promote the progress of filter process.The discharge port of the initial filtrator 19' and fine filter 21' passes through
Pipeline is connected with the top of post-processing kettle 1'.First the material of filter is pushed back to post-processing kettle before filter deslagging and is arranged again
Slag.
Embodiment 3
The present embodiment on the basis of embodiment 1, further optimizes each equipment in esterification portion.
It is preferred that the top of the tail gas tank 21 pass through respectively the top of pipeline and the alcohol-water separation device 20 with
And the alcohol water recovery tank 26 is connected.Play the role of fixed gas emptying buffering and the recycling of material gaseous condensate.The tail
The top and bottom end of gas tank 21 pass through pipeline respectively and are connected with the recycle alcohol tank 17；Top pipeline discharges fixed gas, bottom end
Pipeline walks material condensate liquid.
It is preferred that the middle and upper part of the esterification column 16 and the middle and upper part of alcohol-water separation device 20 pass through pipeline with
Alcohol receiving tank 27 in last handling process is connected, and the bottom end of the esterification column 16 is equipped with coupled logical low-pressure nitrogen pipeline
9.It is connected on the pipeline that the bottom of the esterification column 16 is connected with the discharge pipe 25 and low-pressure nitrogen pipeline 24.
It is preferred that the outside of the recirculated water inner coil pipe is arranged in the saturated vapor inner coil pipe.The circulation
The both ends of water inner coil pipe are connected with recirculated water upper hose 10 and recirculated water return pipe 18 respectively, and the two of the outer coil pipe of the recirculated water
End is connected with recirculated water upper hose 10 and recirculated water return pipe 18 respectively.Recirculated water upper hose 10 is used to convey cooling water,
Cooling water is recycled with after reaction system generation heat exchange by recirculated water return pipe 18, is recycled.Drop is had after flash distillation
Temperature operation, uses circulating water at this time.The both ends of the saturated vapor inner coil pipe respectively with saturated vapor pipeline 8 and condensate
Pipeline 23 is connected, and the both ends of the outer coil pipe of the saturated vapor are connected with saturated vapor pipeline 8 and condensate pipeline 23 respectively.Institute
It states and conveys 4.2MPaG saturated vapor in saturated vapor pipeline 8, for heating, condensate pipeline 18 is condensed for conveying steam
Condensate.
It is preferred that the top of the catalyst storage tank 4 is equipped with coupled logical exhausting pipeline 7, catalyst adds
Add pipeline 6 and low pressure nitrogen tracheae 5, the phthalic anhydride feed mechanism includes the solid charging that 1 top of reaction kettle of the esterification is arranged in
The bottom end discharge port in storehouse 13, solid feeding chamber 13 is connected with the top of reaction kettle of the esterification 1 by pipeline, the solid feeding chamber
13 top left side is equipped with feeding port, and the top of the feeding port is equipped with electric block 12, the top of the solid feeding chamber 13
Right side is equipped with the bag filter 11 for recycling dust in solid feeding chamber 13.Phthalic anhydride is thrown by electric block
Enter into the feeding port of solid feeding chamber 13, the dust in solid feeding chamber 13 is recycled by bag filter, prevents elegant arrive
It is polluted in air.
The above is only the preferred embodiment of the utility model, it is noted that for the general of the art
For logical technical staff, without departing from the principle of this utility model, several improvements and modifications can also be made, these change
It also should be regarded as the protection scope of the utility model into retouching.
Claims (10)
1. a kind of production of adjacent or terephthalate esterification and refining system, including esterification portion and finish, which is characterized in that
The esterification portion includes interior reaction kettle of the esterification, esterification column, esterification condensator, the alcohol-water separation device, tail gas for setting rabbling mechanism
Tank and recycle alcohol tank；
The top of the reaction kettle of the esterification is equipped with the phthalic anhydride feed mechanism for supplying phthalic anhydride, the reaction kettle of the esterification
To be additionally provided with coupled logical low-pressure nitrogen delivery pipe, alcohol delivery pipe and catalyst transport, the catalyst defeated at top
The other end of pipe and the bottom end of catalyst storage tank is sent to be connected, in the recirculated water in the reaction kettle of the esterification equipped with concentric setting
Coil pipe and saturated vapor inner coil pipe, the reaction kettle of the esterification outer wall are equipped with the outer coil pipe of recirculated water and the outer coil pipe of saturated vapor, institute
The bottom end for stating reaction kettle of the esterification is equipped with coupled logical discharge pipe, is equipped with esterification discharging pump on the discharge pipe；
The esterification column is arranged in the top of the reaction kettle of the esterification, the least significant end of the esterification column pass through respectively pipeline with it is described
Reaction kettle of the esterification is connected with the discharge pipe, under the top of the reaction kettle of the esterification passes through in pipeline and the esterification column
Portion is connected；
The top of the esterification column is connected by pipeline with the feed inlet esterification column of the esterification condensator, and the esterification is cold
The condensate outlet of condenser is connected with the top inlet of the alcohol-water separation device by pipeline, the fixed gas of the esterification condensator
Outlet is connected with the top inlet of the tail gas tank by pipeline；
The bottom end of the alcohol-water separation device passes through pipeline respectively and is used to recycle the alcohol water recovery tank of alcohol water and for recycling alcohol
It is connected at the top of the recycle alcohol tank；
The bottom end of the recycle alcohol tank passes through recycle alcohol return pipe and the top of the esterification column and the top of the alcohol-water separation device
Portion is connected, and the recycle alcohol return pipe is equipped with recycle alcohol reflux pump；
The finish include in set the post-processing kettle of rabbling mechanism, treating column, post-processing condenser, alcohol receiving tank, oil separator,
Initial filtrator and fine filter；
The inside of the post-processing kettle is equipped with concentric steam pipe coil and circulation water coil, the both ends point of the circulation water coil
It is not connected with circulation upper hose and recirculation return pipe, the both ends of the steam pipe coil are conveyed with steam pipeline and condensate respectively
Pipe is connected, and bottom is equipped with steam and adds pipeline in the post-processing kettle, and the steam addition pipeline adds pipeline phase with steam
Connection, the post-processing kettle top portion are equipped with liquid and add pipeline, the liquid add pipeline respectively with hot water conveying pipe and lye
Delivery pipe is connected, and the top of the post-processing kettle is additionally provided with coupled logical thick ester coming expects pipe and low pressure nitrogen tracheae, described
The other end of thick ester coming expects pipe is connected with the reaction kettle of the esterification；
The top of the post-processing kettle is connected with the least significant end of the treating column and middle and lower part by pipeline respectively, the processing
The top of tower is connected by pipeline with the steam inlet of the post-processing condenser, the liquid outlet of the post-processing condenser
Alcohol receiving tank is connected by pipeline, the top of the alcohol receiving tank connects vacuum pump by pipeline；
The bottom of the post-processing kettle is equipped with discharge nozzle, and the discharge nozzle passes through first pipe and the oil separator top inlet phase
Connection, the bottom end outlet of the oil separator connect wastewater disposal basin, and the discharge nozzle is entered by second pipe and initial filtrator side
Mouth is connected, and the outlet of the other side of the initial filtrator is connected by pipeline with the entrance on the side wall of the fine filter
Logical, the second pipe is equipped with filter pressing pump, and the bottom end outlet of the fine filter is connected by pipeline with finished pot.
2. the production of adjacent or terephthalate esterification and refining system as described in claim 1, which is characterized in that the alcohol
The bottom end outlet of receiving tank is connected to the recycle alcohol tank by pipeline, and the top of the alcohol receiving tank passes through pipeline and the alcohol water
Separator is connected.
3. the production of adjacent or terephthalate esterification and refining system as described in claim 1, which is characterized in that the steaming
The outside of the circulation water coil is arranged in vapour coil pipe, and the post-processing condenser is circulating water condensing.
4. as described in claim 1 adjacent or terephthalate production esterification and refining system, which is characterized in that it is described every
The top of oil sump is connected by pipeline with the top of the post-processing kettle.
5. the production of adjacent or terephthalate esterification and refining system as described in claim 1, which is characterized in that described first
Filter is arranged right below slag-drip opening, and the slag-drip opening is arranged right below the slag car, the number of the filter pressing pump be two and
Two filter pressing pumps are arranged in parallel on the second pipe, and the initial filtrator passes through pipeline with the top of fine filter and connects
The discharge port of compressed air source, the initial filtrator and fine filter passes through pipeline and is connected with the top for post-processing kettle.
6. the production of adjacent or terephthalate esterification and refining system as described in claim 1, which is characterized in that the tail
The top of gas tank passes through pipeline respectively and is connected with the top of the alcohol-water separation device and the alcohol water recovery tank, the tail gas
The top and bottom end of tank pass through pipeline respectively and are connected with the recycle alcohol tank.
7. the production of adjacent or terephthalate esterification and refining system as described in claim 1, which is characterized in that the ester
The middle and upper part of the middle and upper part and alcohol-water separation device of changing tower passes through pipeline and is connected with the alcohol receiving tank in last handling process, institute
The bottom end for stating esterification column is equipped with coupled logical low-pressure nitrogen pipeline, and the bottom of the esterification column is connected with the discharge pipe
It is connected on logical pipeline and low-pressure nitrogen pipeline.
8. the production of adjacent or terephthalate esterification and refining system as described in claim 1, which is characterized in that described full
The outside of the recirculated water inner coil pipe is set with coil in the steam, and the both ends of the recirculated water inner coil pipe are respectively and on recirculated water
Water pipe is connected with recirculated water return pipe, the both ends of the outer coil pipe of the recirculated water respectively with recirculated water upper hose and recirculated water return water
Pipe is connected, and the both ends of the outer coil pipe of the saturated vapor are connected with saturated vapor pipeline and condensate pipeline respectively.
9. the production of adjacent or terephthalate esterification and refining system as described in claim 1, which is characterized in that described to urge
The top of agent storage tank is equipped with coupled logical exhausting pipeline, catalyst addition pipeline and low pressure nitrogen tracheae.
10. the production of adjacent or terephthalate esterification and refining system as described in claim 1, which is characterized in that described
Phthalic anhydride feed mechanism includes the solid feeding chamber that the reaction kettle of the esterification top is arranged in, the bottom end discharge port of solid feeding chamber with
The top of reaction kettle of the esterification is connected by pipeline, and the top left side of the solid feeding chamber is equipped with feeding port, the feeding port
Top be equipped with electric block, the top right side of the solid feeding chamber is equipped with the cloth bag for recycling dust in solid feeding chamber
Deduster.
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| CN201821649991.6U CN209144047U (en) | 2018-10-11 | 2018-10-11 | A kind of production of adjacent or terephthalate esterification and refining system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111889054A (en) * | 2020-07-22 | 2020-11-06 | 开封市九泓化工有限公司 | Neutralization device for producing dioctyl terephthalate and use method |
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2018
- 2018-10-11 CN CN201821649991.6U patent/CN209144047U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111889054A (en) * | 2020-07-22 | 2020-11-06 | 开封市九泓化工有限公司 | Neutralization device for producing dioctyl terephthalate and use method |
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