CN107266320A - The process that comprehensive energy consumption is reclaimed in a kind of nitro-chlorobenzene rectifying separation - Google Patents
The process that comprehensive energy consumption is reclaimed in a kind of nitro-chlorobenzene rectifying separation Download PDFInfo
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- CN107266320A CN107266320A CN201710492880.2A CN201710492880A CN107266320A CN 107266320 A CN107266320 A CN 107266320A CN 201710492880 A CN201710492880 A CN 201710492880A CN 107266320 A CN107266320 A CN 107266320A
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- water
- hot water
- tower top
- carbonated drink
- steam
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- 238000000034 method Methods 0.000 title claims abstract description 54
- BFCFYVKQTRLZHA-UHFFFAOYSA-N 1-chloro-2-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1Cl BFCFYVKQTRLZHA-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000000926 separation method Methods 0.000 title claims abstract description 32
- 238000005265 energy consumption Methods 0.000 title claims abstract description 11
- 230000008569 process Effects 0.000 title claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 112
- 235000014171 carbonated beverage Nutrition 0.000 claims abstract description 42
- 239000006227 byproduct Substances 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000007791 liquid phase Substances 0.000 claims abstract description 14
- 238000011084 recovery Methods 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 230000003020 moisturizing effect Effects 0.000 claims abstract description 5
- 239000012071 phase Substances 0.000 claims description 20
- CZGCEKJOLUNIFY-UHFFFAOYSA-N 4-Chloronitrobenzene Chemical compound [O-][N+](=O)C1=CC=C(Cl)C=C1 CZGCEKJOLUNIFY-UHFFFAOYSA-N 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 230000033228 biological regulation Effects 0.000 claims description 9
- 239000002826 coolant Substances 0.000 claims description 9
- 239000013589 supplement Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000010977 unit operation Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- KMAQZIILEGKYQZ-UHFFFAOYSA-N 1-chloro-3-nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC(Cl)=C1 KMAQZIILEGKYQZ-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 239000003905 agrochemical Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 206010020741 Hyperpyrexia Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 238000010523 cascade reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- SYSQUGFVNFXIIT-UHFFFAOYSA-N n-[4-(1,3-benzoxazol-2-yl)phenyl]-4-nitrobenzenesulfonamide Chemical class C1=CC([N+](=O)[O-])=CC=C1S(=O)(=O)NC1=CC=C(C=2OC3=CC=CC=C3N=2)C=C1 SYSQUGFVNFXIIT-UHFFFAOYSA-N 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical group [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 210000000582 semen Anatomy 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
- C07C201/06—Preparation of nitro compounds
- C07C201/16—Separation; Purification; Stabilisation; Use of additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The technique that comprehensive energy consumption is reclaimed in the nitro-chlorobenzene rectifying separation of the present invention includes two parts, and Part I is overhead condenser heat recovery, and Part II reclaims for rectifying tower reactor reboiler condensed water heat, and Part I is specially：Rectifying column and overhead condenser complete heat exchange unit operation, tower top carbonated drink bag and complete the fluid delivery member operation that vapour, water flash separation and hot water circulating pump are completed；Part II is specially：The condensed water of rectifying tower reactor reboiler enters one-level drum by the first steam trap and completes flash separation, and byproduct steam is outwards conveyed；Liquid phase hot water in one-level drum enters two grades of drums by the second Liquid level adjusting valve and completes vacuum flashing, and byproduct steam is outwards conveyed；The solidifying water of two grades of drum bottoms enters hot-water collection's groove by the second steam trap, and the hot water of hot-water collection's groove is supplied to tower top carbonated drink bag moisturizing to use through hot water small pump again.This technique realizes energy consumption synthetical recovery byproduct steam, it is to avoid heat-energy losses, saves electric energy, protects environment.
Description
Technical field
The present invention is a kind of technique of comprehensive energy consumption recovery in nitro-chlorobenzene rectifying separation, and in particular to a kind of nitro-chlorobenzene
The heat recovery of rectifying tower top condenser heat recovery and tower reactor reboiler condensed water.
Background technology
Nitro-chlorobenzene is important chemical industry, medicine, agricultural chemicals, dyestuff intermediate, is widely used in：Dyestuff, medicine, agricultural chemicals,
The synthesis of dyestuff.Nitro-chlorobenzene molecular formula C6-H4-Cl-N-O2.Molecular weight 157.56.Meet hyperpyrexia, naked light is flammable.With strong oxidizer
React.Thermally decomposed by height, produce poisonous nitrogen oxides and hydrogen chloride.
Nitro-chlorobenzene has three kinds of isomers：
O-nitrochlorobenzene, O-Chloronitrobenzene；
Paranitrochlorobenzene, P-Chloronitrobenzene；
M-chloronitrobenzene, M-Chloronitrobenzene.
O-nitrochlorobenzene is yellow crystal.With semen armeniacae amarae taste.Relative density 1.305.32~33 DEG C of fusing point.Boiling point 245
~246 DEG C.127 DEG C of flash-point.It is water insoluble；It is dissolved in benzene, ethanol, ether.
The faint yellow monocline prismatic crystals of paranitrochlorobenzene.Relative density 1.520.82~84 DEG C of fusing point.242 DEG C of boiling point.Dodge
127 DEG C (closed-cup) of point.It is water insoluble；It is soluble in the organic solvents such as hot ethanol, ether, carbon disulfide.
M-chloronitrobenzene pale yellow crystals.Relative density 1.534 (20/4 DEG C).46 DEG C of fusing point.236 DEG C of boiling point.Flash-point 127
℃.It is water insoluble；It is dissolved in most organic solvents.
This process is the chemical reaction that nitro is introduced on aromatic hydrocarbons, i.e., produced to one nitro of introducing on the phenyl ring of chlorobenzene
It is adjacent, to a, nitro chlorobenzene.Technology theory:A set of nitrification installation by three pots of cascade reactions of a device (be annular nitrator,
1# nitrifications pot, 2# nitrifications pot, 3# nitrifications pot) the acid nitro-chlorobenzene mixture of generation, separated after alkali cleaning, washing and adjacent nitre is made
Base chlorobenzene, paranitrochlorobenzene and m-chloronitrobenzene.Separation includes rectifying column separation and Crystallization Separation.
Chemical equation:
In rectifying separation process, the vapour phase of light component paranitrochlorobenzene passes through steam film, liquid film in inner-tower filling material section in tower
Rectifying tower top is risen to after mass transfer, this portion temperature is up to 157 ± 2 DEG C, and technique needs the condensation of vapour phase paranitrochlorobenzene to become
Liquid phase, realizes that a part of rectifying column itself flows back, another part enters later crystallization process, and finished product is produced by crystal refining
Paranitrochlorobenzene.Paranitrochlorobenzene is changed into liquid phase this phase transition process from vapour phase, releases substantial amounts of heat, and this partial heat technique is adopted
Taken out with heat transfer, realize and paranitrochlorobenzene is changed into liquid phase phase transition process from vapour phase.Traditional process is to use 25 DEG C
The progress of~32 DEG C of recirculated waters is cooled down, and this partial heat enters circulating cooling water tower systems, had not only been wasted electric energy but also had been consumed big
The water resource of amount.
Nitro-chlorobenzene rectifying reboiler heat source stream is condensed after heat exchange, and this partial condensation coolant-temperature gage is up to 183 ± 2 DEG C,
Heat is big, is reclaimed, can both be used for producing as heat source by technical matters, can also make as insulation steam
With.
Traditional process technical disadvantages are a lot：
1st, rectifying tower top waste heat is not reclaimed, and is also had a disadvantage that：
1) selection recirculated water, because the oily side of paranitrochlorobenzene and the water side temperature difference are larger, easily causes tower top cold as cooling medium
Condenser drawing crack is damaged；Also resulting in paranitrochlorobenzene crystallization causes condenser tubulation to block, and causes production accident
2) selection recirculated water is as cooling medium, and recirculated water absorbs heat and takes circulating cooling Tower System to, causes heat energy to damage
Lose, cooling tower filler is damaged, electric energy is consumed again.
2nd, rectifying tower reactor reboiler condensation water residual heat is not reclaimed, and is also had a disadvantage that：
1) rectifying tower reactor reboiler condensed water is not reclaimed, and causes water resource significant wastage；
2) rectifying tower reactor reboiler condensed water is discharged into ditch or lower water, that is, pollutes environment, there is damage subsoil drain net.
The content of the invention
Not enough present in existing conventional art in order to solve, the present invention provides comprehensive in a kind of nitro-chlorobenzene rectifying separation
The process that energy consumption is reclaimed, and by-product steam.The technique has both saved electric energy, it is to avoid accident in production and avoid heat
The loss of energy, and by-product low-pressure steam, use for production and the insulation of nitro-chlorobenzene, also protect environment.
In order to realize the purpose of the present invention, adopt the following technical scheme that：
The process that comprehensive energy consumption is reclaimed in a kind of nitro-chlorobenzene rectifying separation, including two parts, Part I is tower
Condenser heat recovery is pushed up, Part II is the heat recovery of rectifying tower reactor reboiler condensed water；
Part I is specially：Vapour phase nitro-chlorobenzene at the top of rectifying column, into the tube side of overhead condenser, shell side is with warm
Water completes to condense the heat exchange of paranitrochlorobenzene as circulating cooling medium by the heat exchange of overhead condenser tube side and shell side
Process；The circulating hot water outlet pipe connection tower top carbonated drink bag of the overhead condenser, hot water enters after tower top carbonated drink bag after heat absorption
Flash separation, vapour phase is the pipeline that byproduct steam wraps portion by tower top carbonated drink, and going out vapour pressure force regulating valve by first outwards makes
Transferred out with unit is stable, complete byproduct steam sends process outside；The liquid phase hot water of the tower top carbonated drink bag passes through its underpart
Pipeline is connected with hot water circulating pump, and the shell that power is delivered to nitro-chlorobenzene rectifying column tower top condenser is provided by hot water circulating pump
Journey, hot water continues continuous recycle as circulating cooling medium and completes fluid delivery process；The steam of the tower top carbonated drink bag
Outwards outer water is needed to supplement after output, outer water is by being connected to the pipeline that tower top carbonated drink is wrapped, by hot water small pump through the first liquid
The circulatory system is formed in the stable input of position regulating valve to tower top carbonated drink bag；
Part II is specially：The condensed water of rectifying tower reactor reboiler enters one-level by the first steam trap through pipeline connection
Drum, condensed water, which enters, completes flash separation after one-level drum, the vapour phase of flash separation is byproduct steam removing by its top
After foam device, go out vapour pressure force regulating valve by second and outwards transfer out, that realizes byproduct steam sends process outside；In one-level drum
Liquid phase hot water is connected through its underpart pipeline, enters two grades of drums by the second Liquid level adjusting valve stable regulation, and hot water enters two grades
Complete vacuum flashing after drum, it is outside that the vapour phase of vacuum flashing is that byproduct steam goes out vapour pressure force regulating valve by the 3rd of its top
Transfer out, that realizes byproduct steam sends process outside；The solidifying water of two grades of drum bottoms by the second steam trap through pipeline connect into
Enter hot-water collection's groove, the hot water of hot-water collection's groove is supplied to tower top carbonated drink bag moisturizing to use through hot water small pump again.
Compared with prior art, the present invention has advantages below：
Invention provides the process that comprehensive energy consumption is reclaimed in a kind of nitro-chlorobenzene rectifying separation, and this technique had both been realized continuously
Change operation, both reclaim the low pressure steaming of the preheating of nitro-chlorobenzene rectifying column tower top, the heat of the solidifying water of tower reactor reboiler, and by-product
Vapour, it is to avoid heat-energy losses, has saved water resource and electric energy, also achieves heat energy recycling, protects environment.
Brief description of the drawings
Fig. 1 is system circulation schematic flow sheet of the invention；
In figure：1- rectifying columns, 2- overhead condensers, 3- tower tops carbonated drink bag, 4- hot water circulating pumps, 5- hot water small pumps, 6-
Hot-water collection's groove, 7- rectifying tower reactor reboilers, 8- one-level drums, 9- demisters, bis- grades of drums of 10-, the regulation of the liquid levels of 11- first
Valve, 12- first goes out vapour pressure force regulating valve, the steam traps of 13- first, and 14- second goes out vapour pressure force regulating valve, the regulation of the liquid levels of 15- second
Valve, 16- the 3rd goes out vapour pressure force regulating valve, the steam traps of 17- second.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
The process that comprehensive energy consumption is reclaimed in a kind of nitro-chlorobenzene rectifying separation, including two parts, Part I is tower
The heat recovery of condenser 2 is pushed up, Part II is the heat recovery of the condensed water of rectifying tower reactor reboiler 7,
Part I is specially：The vapour phase nitro-chlorobenzene at the top of rectifying column 1, into the tube side of overhead condenser 2, shell side with
Hot water completes to condense the heat of paranitrochlorobenzene as circulating cooling medium by the heat exchange of the tube side of overhead condenser 2 and shell side
Exchange process；The circulating hot water outlet pipe connection tower top carbonated drink bag 3 of the overhead condenser 2, hot water enters tower top vapour after heat absorption
Flash separation after water bag 3, vapour phase is the pipeline that byproduct steam wraps 3 tops by tower top carbonated drink, and going out steam pressure by first is adjusted
Valve 12 is outwards transferred out using unit is stable, and complete byproduct steam sends process outside；The liquid phase hot water of the tower top carbonated drink bag 3
It is connected by its underpart pipeline with hot water circulating pump 4, providing power by hot water circulating pump 4 is delivered to nitro-chlorobenzene rectifying column 1
The shell side of overhead condenser 2, hot water continues continuous recycle as circulating cooling medium and completes fluid delivery process；The tower
Top carbonated drink needs outer water to supplement after wrapping the 3 outside output of steam, and outer water passes through heat by being connected to the pipeline that tower top carbonated drink wraps 3
Water small pump 5 in the stable input of the first Liquid level adjusting valve 11 to tower top carbonated drink bag 3 through forming the circulatory system；
Wherein, the heat exchanging process of (1) nitro-chlorobenzene rectifying column tower top condenser：
Check that rectifying column 1 and the system meter of overhead condenser 2 show whether facility is normal, check that tower top carbonated drink wraps 3 instrument
Show whether facility is normal, check that hot water circulating pump 4 and instrument are displayed whether normally；Then hot water small pump 5 is opened to tower top
Intake in carbonated drink bag 3, the imported valve of hot water circulating pump 4 is opened, by delivery to the import of overhead condenser 2, through overhead condensation
The outlet of device 2 is back to tower top carbonated drink bag 3, forms closed circuit circulatory system.After rectifying column 1 is working properly, tower top temperature reaches 157 ± 2
DEG C, rise nitro-chlorobenzene vapour phase through tower top into the cold tube side of overhead condenser 2 from tower reactor, 157 ± 2 DEG C of nitro-chlorobenzene vapour phase is near
100 DEG C or so, its heat is transmitted to the aqueous phase of the shell side of overhead condenser 2, and water rises to 135 DEG C of formation steam water interfaces from 133 DEG C and entered
Enter tower top carbonated drink bag 3.
(2) carbonated drink flash separation：135 DEG C of steam water interface enters tower top carbonated drink bag 3, and carbonated drink flash separation is steamed
Vapour is on top, and water is in bottom；In tower top carbonated drink bag 3, top is flash separation space, and bottom is liquid phase region, and Liquid level exists
50% or so is advisable.
(3) byproduct steam process：In process of production, the continuous flash separation of steam is produced, and this some vapor is exactly by-product
Steam, the insulation of process equipment and process pipe that this steam can be used in nitro-chlorobenzene production；To make byproduct steam from tower
Top carbonated drink bag 3 is conveyed from inside to outside, and the design pressure table on tower top carbonated drink bag 3 is supplied to user with pressure regulation automatic stabilisation.
(4) outer water process is supplemented：The tower top waste heat reclaiming process of nitro-chlorobenzene rectifying column 1 can be seen that by process (1)
Circulating cooling system is a closed circuit circulatory system, the stable outside supply of byproduct steam, it is necessary to the outer water of supplement, tower top carbonated drink bag
3 transfer out the steam of how many unit mass, by the auto-adjustment control of the first Liquid level adjusting valve 11 are accomplished by that how many unit supplemented
The outer water of quality.
(5) fluid delivery process：This process is that the liquid phase hot water of 3 bottoms of tower top carbonated drink bag is provided by hot water circulating pump 4
Power, conveying hot water supplies overhead condenser 2 as circulating cooling medium, and overhead condenser 2 goes out vapour, aqueous mixtures and returns to tower top
Carbonated drink bag 3, forms recycling process.
Part II is specially：The condensed water of rectifying tower reactor reboiler 7 is connected by the first steam trap 13 through pipeline to be entered
One-level drum 8, condensed water, which enters, completes flash separation after one-level drum 8, the vapour phase of flash separation is that byproduct steam passes through thereon
After the demister 9 in portion, go out vapour pressure force regulating valve 14 by second and outwards transfer out, that realizes byproduct steam sends process outside；One
Liquid phase hot water in level drum 8 is connected through its underpart pipeline, enters two grades of drums by the stable regulation of the second Liquid level adjusting valve 15
10, hot water completes vacuum flashing after entering two grades of drums 10, and the vapour phase of vacuum flashing is byproduct steam the by its top the 3rd
Go out vapour pressure force regulating valve 16 outwards to transfer out, that realizes byproduct steam sends process outside；The solidifying water of two grades of bottoms of drum 10 passes through
Second steam trap 17 enters hot-water collection's groove 6 through pipeline connection, and the hot water of hot-water collection's groove 6 is supplied to through hot water small pump 5 again
Tower top carbonated drink is wrapped 3 moisturizings and used.
Wherein, (1) carbonated drink flash separation and byproduct steam course of conveying：183 ± 2 DEG C of condensed water enters one-level drum 8,
Carbonated drink flash separation, steam is on top, and water is in bottom；In one-level drum 8, top is flash separation space, and bottom is liquid phase
Area, Liquid level is advisable 50%.The continuous flash separation of steam is produced, and this some vapor is exactly 0.6MPa byproduct steam, this
Steam can be used as process production thermal source after nitro-chlorobenzene；To make byproduct steam be conveyed from inside to outside from one-level drum 8, one
Upper design pressure table is set on level drum 8, user is supplied to pressure regulation automatic stabilisation.
(2) vacuum flashing process：The bottom of one-level drum 8 is the hot water of liquid phase region, is adjusted through the second Liquid level adjusting valve 15 is stable
Section enters two grades of drums 10.Two grades of drums 10 are controlled in 0.2MPa, and hot water enters two grades of vacuum flashings of drum 10, what flash distillation was produced
Steam through two grades of top of drum 10 the 3rd go out vapour pressure force regulating valve 16 regulation voltage stabilizing outwards convey, this some vapor is exactly
0.2MPa byproduct steam, this steam can be used as the insulation of nitro-chlorobenzene process equipment and pipeline；To make byproduct steam
Conveyed from inside to outside from two grades of drums 10, the design pressure table on two grades of drums 10, user is supplied to pressure regulation automatic stabilisation.
(3) Water Sproading process is coagulated：Two grades of drums 10 remain some hot water after flashing, and technique takes the second steam trap 17 outside
Conveying, this part hot-water process design hot-water collection groove 6, the hot water of collection can be supplied to Part I tower top carbonated drink to wrap 3 again
Moisturizing is used.
This technique can realize continuous operation, that is, reclaim the waste heat of nitro-chlorobenzene rectifying column tower top condenser, return again
The waste heat of nitro-chlorobenzene tower bottom of rectifying tower reboiler has been received, realize energy consumption synthetical recovery by-product low-pressure steam, it is to avoid heat energy
Loss, saves electric energy, also protects environment.
Claims (1)
1. the process that comprehensive energy consumption is reclaimed in a kind of nitro-chlorobenzene rectifying separation, including two parts, Part I is tower top
Condenser (2) heat recovery, Part II is the heat recovery of rectifying tower reactor reboiler (7) condensed water, it is characterised in that：
Part I is specially：Vapour phase nitro-chlorobenzene at the top of rectifying column (1), into the tube side of overhead condenser (2), shell side with
Hot water completes to condense paranitrochlorobenzene as circulating cooling medium by the heat exchange of overhead condenser (2) tube side and shell side
Heat exchanging process；The circulating hot water outlet pipe connection tower top carbonated drink bag (3) of the overhead condenser (2), hot water enters after heat absorption
Tower top carbonated drink wraps (3) flash separation afterwards, and vapour phase is the pipeline that byproduct steam wraps (3) top by tower top carbonated drink, is gone out by first
Vapour pressure force regulating valve (12) is outwards transferred out using unit is stable, and complete byproduct steam sends process outside；The tower top carbonated drink
The liquid phase hot water of bag (3) is connected by its underpart pipeline with hot water circulating pump (4), and it is defeated to provide power by hot water circulating pump (4)
The shell side of nitro-chlorobenzene rectifying column (1) overhead condenser (2) is delivered to, hot water continues continuous recycle as circulating cooling medium
Complete fluid delivery process；The steam of the tower top carbonated drink bag (3) needs outer water to supplement after outwards exporting, and outer water is by being connected to
The pipeline of tower top carbonated drink bag (3), is wrapped by hot water small pump (5) through the stable input of the first Liquid level adjusting valve (11) to tower top carbonated drink
(3) circulatory system is formed in；
Part II is specially：The condensed water of rectifying tower reactor reboiler (7) is connected by the first steam trap (13) through pipeline to be entered
One-level drum (8), condensed water completes flash separation afterwards into one-level drum (8), and the vapour phase of flash separation is that byproduct steam passes through
After the demister (9) on its top, go out vapour pressure force regulating valve (14) by second and outwards transfer out, realize sending outside for byproduct steam
Process；Liquid phase hot water in one-level drum (8) is connected through its underpart pipeline, is entered by the second Liquid level adjusting valve (15) stable regulation
Enter two grades of drums (10), hot water completes vacuum flashing afterwards into two grades of drums (10), and the vapour phase of vacuum flashing is that byproduct steam leads to
Cross the 3rd of its top and go out vapour pressure force regulating valve (16) and outwards transfer out, that realizes byproduct steam sends process outside；Two grades of drums
(10) the solidifying water of bottom enters hot-water collection's groove (6), the heat of hot-water collection's groove (6) by the second steam trap (17) through pipeline connection
Water is supplied to tower top carbonated drink to wrap (3) moisturizing and used through hot water small pump (5) again.
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Cited By (1)
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| WO2022155777A1 (en) * | 2021-01-19 | 2022-07-28 | 汇智工程科技股份有限公司 | Waste heat recycling device for glycerin refining production process |
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| US20050261530A1 (en) * | 2004-05-21 | 2005-11-24 | Stell Richard C | Vapor/liquid separation apparatus for use in cracking hydrocarbon feedstock containing resid |
| CN203694644U (en) * | 2013-07-23 | 2014-07-09 | 江苏福斯特化工制造有限公司 | Recycling device for heat at top of rectifying tower |
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