CN110041267A - Carbendazim clean-production system - Google Patents
Carbendazim clean-production system Download PDFInfo
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- CN110041267A CN110041267A CN201910458713.5A CN201910458713A CN110041267A CN 110041267 A CN110041267 A CN 110041267A CN 201910458713 A CN201910458713 A CN 201910458713A CN 110041267 A CN110041267 A CN 110041267A
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- Prior art keywords
- unit
- carbendazim
- amination
- hydrolysis
- tank
- Prior art date
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- TWFZGCMQGLPBSX-UHFFFAOYSA-N Carbendazim Natural products C1=CC=C2NC(NC(=O)OC)=NC2=C1 TWFZGCMQGLPBSX-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 239000006013 carbendazim Substances 0.000 title claims abstract description 106
- JNPZQRQPIHJYNM-UHFFFAOYSA-N carbendazim Chemical compound C1=C[CH]C2=NC(NC(=O)OC)=NC2=C1 JNPZQRQPIHJYNM-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 76
- 230000007062 hydrolysis Effects 0.000 claims abstract description 66
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 66
- 238000005576 amination reaction Methods 0.000 claims abstract description 63
- MYFXBBAEXORJNB-UHFFFAOYSA-N calcium cyanamide Chemical compound [Ca+2].[N-]=C=[N-] MYFXBBAEXORJNB-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000005406 washing Methods 0.000 claims abstract description 57
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000009833 condensation Methods 0.000 claims abstract description 51
- 230000005494 condensation Effects 0.000 claims abstract description 51
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 38
- 238000001035 drying Methods 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 238000003825 pressing Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000006482 condensation reaction Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 51
- 239000002351 wastewater Substances 0.000 claims description 44
- XMJHPCRAQCTCFT-UHFFFAOYSA-N methyl chloroformate Chemical compound COC(Cl)=O XMJHPCRAQCTCFT-UHFFFAOYSA-N 0.000 claims description 32
- 238000003756 stirring Methods 0.000 claims description 28
- 239000000706 filtrate Substances 0.000 claims description 25
- 239000007789 gas Substances 0.000 claims description 25
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 24
- 238000005360 mashing Methods 0.000 claims description 24
- 238000002156 mixing Methods 0.000 claims description 22
- 239000003518 caustics Substances 0.000 claims description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 18
- 238000012432 intermediate storage Methods 0.000 claims description 15
- 238000005842 biochemical reaction Methods 0.000 claims description 11
- 239000012295 chemical reaction liquid Substances 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 11
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000010612 desalination reaction Methods 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 3
- 238000004042 decolorization Methods 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 235000019698 starch Nutrition 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 abstract description 13
- 229910001424 calcium ion Inorganic materials 0.000 abstract description 13
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 12
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 239000000575 pesticide Substances 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 abstract description 2
- 239000011259 mixed solution Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 29
- 239000002585 base Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
- 238000003860 storage Methods 0.000 description 8
- 239000006210 lotion Substances 0.000 description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 5
- 235000011941 Tilia x europaea Nutrition 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 239000004571 lime Substances 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 201000010099 disease Diseases 0.000 description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
- 238000005119 centrifugation Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 206010027146 Melanoderma Diseases 0.000 description 2
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000011033 desalting Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 235000017060 Arachis glabrata Nutrition 0.000 description 1
- 244000105624 Arachis hypogaea Species 0.000 description 1
- 235000010777 Arachis hypogaea Nutrition 0.000 description 1
- 235000018262 Arachis monticola Nutrition 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000207199 Citrus Species 0.000 description 1
- 244000241257 Cucumis melo Species 0.000 description 1
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241000221696 Sclerotinia sclerotiorum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 244000098338 Triticum aestivum Species 0.000 description 1
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 description 1
- FIEIAVPKEPHAMJ-UHFFFAOYSA-N [Ca].COC=O Chemical compound [Ca].COC=O FIEIAVPKEPHAMJ-UHFFFAOYSA-N 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 235000020971 citrus fruits Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 235000020232 peanut Nutrition 0.000 description 1
- MQKPEUAOJLJUMD-UHFFFAOYSA-N phenol;piperazine Chemical compound C1C[NH2+]CCN1.[O-]C1=CC=CC=C1 MQKPEUAOJLJUMD-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D235/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings
- C07D235/02—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings condensed with carbocyclic rings or ring systems
- C07D235/04—Benzimidazoles; Hydrogenated benzimidazoles
- C07D235/24—Benzimidazoles; Hydrogenated benzimidazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2
- C07D235/30—Nitrogen atoms not forming part of a nitro radical
- C07D235/32—Benzimidazole-2-carbamic acids, unsubstituted or substituted; Esters thereof; Thio-analogues thereof
Abstract
The invention discloses a kind of carbendazim clean-production systems, belong to pesticide chemical technical field.Including sequentially connected lime nitrogen hydrolysis unit, amination unit, condensation unit, washing centrifugal unit and drying unit.Lime nitrogen hydrolysis unit receives lime nitrogen and sodium carbonate, carries out independent hydrolysis to lime nitrogen, generates cyanamide, and cyanamide is pumped to amination unit, amination unit completes aminating reaction, and condensation unit completes condensation reaction, centrifugal unit multi-stage water wash is washed, drying unit is dried.By the way that lime nitrogen hydrolysis unit is arranged, lime nitrogen and sodium carbonate liquor are subjected to mixed hydrolysis in hydrolysis kettle, calcium ion and carbanion in mixed solution generate calcium carbonate suspension, through decalcification filter press filters pressing, most calcium ion is removed in advance, and avoiding a large amount of calcium ion, fouling causes equipment installation to block in the reaction system, significantly extend the production run period, apparatus and process process is simple, and operating cost is low, there is huge environmental benefit.
Description
Technical field
The invention belongs to pesticide chemical technical fields, and in particular to a kind of carbendazim clean-production system.
Background technique
Carbendazim be efficiently, the systemic fungicide of wide spectrum, safety, can prevent and treat leaf spot of peanut, black spot, stem rot, three
The head blight of wheat, the black spot of Cereal, sclerotinia sclerotiorum, rice sheath blight disease, citrus bacterial canker disease, storage disease are melon withered
Disease, flowers root rot, stem rot etc..In addition, carbendazim weaving, printing and dyeing, papermaking, process hides, in terms of also have
Wide application prospect.
The domestic main preparation process of carbendazim is lime nitrogen method.Cyanamide hydrogen calcium is produced in lime nitrogen hydrolysis, is crossed and is filtered out residue, so
Esterification is occurred into for cyanamide hydrogen calcium solution and methylchloroformate afterwards and generates cyanamide base methyl formate calcium salt soln, the latter again with neighbour
Phenylenediamine occurs condensation reaction and obtains carbendazim.The technique is primarily present following problems, first is that condensation reaction due to calcium from
Son exists, and influences carbendazim quality and yield；Second is that causing equipment installation to be easy blocking, production cycle since calcium ion exists
It is short；Third is that generating waste water contains a large amount of calcium chloride and ammonium chloride, processing difficulty is big, it is difficult to resource utilization.
In the prior art, about the minimizing technology of calcium ion, including carbon dioxide deliming, ion exchange resin deliming and electricity
Dialysis deliming, but these methods long, cumbersome, decalcification problem at high cost that there is process flow.
Summary of the invention
It is independently hydrolyzed in view of this, the present invention provides a kind of lime nitrogen, reduces system calcium ion, process flow is simple
Carbendazim clean-production system.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of carbendazim clean-production system, including sequentially connected lime nitrogen hydrolysis unit, amination unit, condensation unit, water
Wash centrifugal unit and drying unit；
The lime nitrogen hydrolysis unit receives the lime nitrogen and sodium carbonate of extraneous conveying, carries out independent hydrolysis to lime nitrogen, generates
Cyanamide, and cyanamide is pumped to the amination unit；The amination unit receives the lime nitrogen hydrolysis unit conveying
Cyanamide and the methylchloroformate and liquid alkaline of extraneous conveying, complete aminating reaction, and aminating reaction liquid is delivered to the condensation
Unit；The condensation unit receives the aminating reaction liquid by the amination unit transportation and o-phenylenediamine, the hydrochloric acid of extraneous conveying
And formaldehyde, condensation reaction is completed, and condensation reaction solution is exported to the washing centrifugal unit；The washing centrifugal unit receives
By the condensation reaction solution of the condensation unit output, multi-stage water wash is carried out, and the wet carbendazim obtained after washing is delivered to
The drying unit；The drying unit is received by the wet carbendazim of the washing centrifugal unit conveying, and is dried.
Preferably, the lime nitrogen hydrolysis unit includes sequentially connected mixing ground pond, hydrolysis kettle, decalcification filter press and list
Cyanamide intermediate storage tank；
Be provided with to the mixing mixing stirring on pond, the mixing pond receive lime nitrogen and sodium carbonate liquor, described mixed
Expect to be uniformly mixed under the stirring action of stirring, and the mixed liquor of lime nitrogen and sodium carbonate is pumped to the hydrolysis kettle；The water
It solves kettle and receives the lime nitrogen of by the mixing pond pumping and the mixed liquor of sodium carbonate, complete lime nitrogen hydrolysis, and by hydrolyzate
It is delivered to the decalcification filter press；The decalcification filter press receives the hydrolyzate conveyed by the hydrolysis kettle, carries out to hydrolyzate
Filters pressing separates cyanamide, and cyanamide is delivered to cyanamide intermediate storage tank；The cyanamide intermediate storage tank is received and is temporarily deposited
The cyanamide conveyed by the decalcification filter press is put, and cyanamide is pumped to the amination unit.
Preferably, the lime nitrogen hydrolysis unit further includes sequentially connected filter residue mashing tank, secondary filter press and filtrate
Slot, the mashing tank connect the sludge outlet of the decalcification filter press；The mashing tank is received from the decalcification filter press
Filter residue is beaten filter residue, and slurries are delivered to the secondary filter press；The secondary filter press is received by the mashing
The slurries of tank conveying carry out filters pressing to slurries, and filtrate are delivered to the filtrate receiver, and filter residue is delivered to deslagging factory；It is described
Filtrate receiver receives the filtrate from secondary filter press, and by filtrate with being pumped to mixing pond.
Preferably, the amination unit includes amination kettle and the methylchloroformate feed surge tank connecting with the amination kettle
With liquid alkaline feed surge tank, the methylchloroformate feed surge tank receives methylchloroformate and feeds and methylchloroformate is added dropwise
To the amination kettle, the liquid alkaline feed surge tank receives liquid alkaline and feeds and liquid alkaline is added dropwise to the amination kettle, the amination
Kettle receive by the hydrolysis unit pumping come cyanamide and the methylchloroformate feed surge tank dropwise addition methylchloroformate
The liquid alkaline being added dropwise with the liquid alkaline feed surge tank completes aminating reaction, and aminating reaction liquid is exported to the condensation unit.
Preferably, Weighing module is provided on the methylchloroformate feed surge tank.
Preferably, nitrogen feed pipeline is provided on the amination kettle.
Preferably, the condensation unit includes condensation kettle, and the condensation kettle receives the amination by the amination unit transportation
Reaction solution and hydrochloric acid, o-phenylenediamine and formaldehyde charging, complete condensation reaction, generate carbendazim crude liquid, and carbendazim crude liquid is defeated
It send to the washing centrifugal unit.
Preferably, the washing centrifugal unit includes sequentially connected water washing tank, belt vacuum filter, carbendazim mashing
Tank and carbendazim centrifuge, washing desalted water is filled in the water washing tank, and the belt vacuum filter is received by described
It is condensed the carbendazim crude liquid of unit transportation and the desalted water that is pumped by the water washing device, under the conditions of existing for the vacuum, is completed
Washing to carbendazim crude liquid, and the carbendazim that washing is completed is delivered into the carbendazim and is beaten tank；The carbendazim is beaten
Starch tank receive by the belt vacuum filter convey Lai carbendazim solid, add water to make carbendazim pulp, and will be after pulp
Carbendazim is delivered to the carbendazim centrifuge；The carbendazim centrifuge is received by the pulp of carbendazim mashing tank conveying
Carbendazim, be centrifuged, obtain wet carbendazim, and wet carbendazim is delivered to the drying unit.
Preferably, the carbendazim clean-production system further includes tail gas absorption unit, and the tail gas absorption unit includes
Sequentially connected air-introduced machine, level-one caustic wash tower and second level caustic wash tower, the arrival end of the air-introduced machine are separately connected the lime nitrogen
Hydrolysis unit, the amination unit, the condensation unit, the washing centrifugal unit and the drying unit, to collect more bacterium
The tail gas generated in clever production process, and tail gas is made to pass sequentially through the level-one caustic wash tower and second level caustic wash tower progress alkali cleaning
Discharge.
Preferably, the carbendazim clean-production system further includes water treatment unit, and the water treatment unit includes successively
Decoloration device, desalter and the biochemical reaction tank of connection；
The decoloration device receives the lime nitrogen hydrolysis unit, the amination unit, the condensation unit, the washing respectively
The waste water that centrifugal unit and the drying unit generate in process of production carries out decolorization to waste water, and will be after decoloration
Waste water is delivered to the desalter；The desalter receives the waste water after the decoloration conveyed by the decoloration device, to de-
Waste water carries out desalting processing after color, and waste water after desalination is delivered to the biochemical reaction tank；The biochemical reaction tank receives institute
Waste water after the desalination by desalter conveying is stated, biochemical treatment is carried out to waste water after desalination, and it is the waste water after biochemical treatment is defeated
It send to municipal sewage pipe network.
As shown from the above technical solution, the present invention provides a kind of carbendazim clean-production systems, the beneficial effect is that: it is first
First, by the way that the lime nitrogen hydrolysis unit is arranged, lime nitrogen and sodium carbonate liquor is subjected to mixed hydrolysis in the hydrolysis kettle, mixed
The calcium ion and carbanion closed in solution generates calcium carbonate suspension, after filtering removes filter residue, filtrate is collected, in filtrate
Cyanamide content >=90g/L, dicyandiamide content≤6000mg/L can satisfy carbendazim production requirement.In this way, removing in advance
Most calcium ion avoids the fouling in the reaction system of a large amount of calcium ion, causes equipment installation to block, significantly extend
The production run period.Meanwhile apparatus and process process is simple, operating cost is with respect to traditional technology only small elevation.Secondly, extracting
Calcium ion is removed from reaction system, not only reduces the discharge amount of waste water in carbendazim production process, and is greatly lowered
In carbendazim production process it is wastewater produced in calcium ion content, the calcium ion content in processed waste water is by tradition
The > 32000mg/L of technique is reduced to < 1000mg/L, achieves huge environmental benefit.
Detailed description of the invention
Fig. 1 is carbendazim clean-production system flow diagram.
Fig. 2 is the pipeline flow diagram of lime nitrogen hydrolysis unit.
Fig. 3 is the pipeline flow diagram of amination unit.
Fig. 4 is the pipeline flow diagram for being condensed unit.
Fig. 5 is the pipeline flow diagram for washing centrifugal unit.
Fig. 6 is the pipeline flow diagram of drying unit.
Fig. 7 is the pipeline flow diagram of tail gas absorption unit.
Fig. 8 is the pipeline flow diagram for the treatment of unit for waste water.
In figure: carbendazim clean-production system 10, lime nitrogen hydrolysis unit 100, mixing ground pond 110, lime nitrogen feed pipe
111, sodium carbonate feed pipe 112, mixing stirring 113, mixed liquor discharging pump 114, feed conveyor belt 115, hydrolysis kettle 120, hydrolysis
Stirring 121, decalcification filter press 130, hydrolyzate pressure-filtering tank 131, homogeneous stirring 132, filters pressing feed pump 133, the storage of cyanamide centre
Tank 140, cyanamide discharging pump 141, filter residue mashing tank 150, water inlet pipe 151, mashing stirring 152, secondary filter press feed pump
153, secondary filter press 160, filtrate receiver 170, filtrate discharging pump 171, sodium carbonate liquid pool 180, sodium carbonate feed pipe 181, carbon
Sour sodium homogeneous stirring 182, sodium carbonate discharging pump 183, amination unit 200, amination kettle 210, refrigeration collet 211, amination stirring
212, cyanamide base discharging pump 213, nitrogen feed pipeline 214, methylchloroformate feed surge tank 220, liquid alkaline feed surge tank
230, methylchloroformate storage tank 240, methylchloroformate feed pump 241, Weighing module 242, liquid alkaline storage tank 250, liquid alkaline feed pump
251, amido intermediate storage tank 260, condensation unit 300, condensation kettle 310, cyanamide base feed pipe 311, o-phenylenediamine feed pipe 312,
Formaldehyde feed pipe 313, hydrochloric acid feed pipe 314, condensation stirring 315, carbendazim crude liquid discharging pump 316, condensing tower 320, gas phase into
Expects pipe 321, gas phase discharge nozzle 322, lime set return pipe 323, washing centrifugal unit 400, water washing tank 410, water lotion discharging pump
411, belt vacuum filter 420, carbendazim mashing tank 430, carbendazim slurry discharge pump 431, carbendazim centrifuge 440, from
Edema with the heart involved collecting tank 450, centrifugal water discharging pump 451, wet carbendazim conveying device 460, drying unit 500, fluidized bed dryer
510, cyclone dust collectors 520, bag filter 530, tail gas absorption unit 600, air-introduced machine 610, level-one caustic wash tower 620, level-one
Alkali cleaning pump 621, second level caustic wash tower 630, second level alkali cleaning pump 631, treatment unit for waste water 700, decoloration device 710, desalter
720, biochemical reaction tank 730.
Specific embodiment
For ease of understanding, below in conjunction with attached drawing of the invention, to the technical solution and skill of the specific embodiment of the invention
Art effect further describes in detail.
Fig. 1 is please referred to, in the specific embodiment of the present invention, a kind of carbendazim clean-production system 10, including
Sequentially connected lime nitrogen hydrolysis unit 100, amination unit 200, condensation unit 300, washing centrifugal unit 400 and drying unit
500。
The lime nitrogen hydrolysis unit 100 receives raw material lime nitrogen and sodium carbonate, carries out independent hydrolysis to lime nitrogen, generates
Cyanamide, and cyanamide is pumped to the amination unit 200.
Please together referring to Fig. 2, specifically, the lime nitrogen hydrolysis unit 100 including sequentially connected mixing pond 110,
Hydrolysis kettle 120, decalcification filter press 130 and cyanamide intermediate storage tank 140 are provided with to the mixing lime nitrogen charging on pond 110
Pipe 111, sodium carbonate feed pipe 112, mixing stirring 113 and mixed liquor discharging pump 114, the lime nitrogen feed pipe 111 is far from institute
The one end in pond 110 is connected with feed conveyor belt 115 with stating mixing, and lime nitrogen is by the feed conveyor belt 115, through the lime
Nitrogen feed pipe 111 is with being transported into the mixing in pond 110, meanwhile, sodium carbonate liquor is via the sodium carbonate feed pipe 112
Into the mixing in pond 110, under room temperature the mixing stirring 113 effect under be uniformly mixed, mixed sodium carbonate and
Lime nitrogen mixed liquor is pumped into the hydrolysis kettle 120 via the mixed liquor discharging pump 114.
Be provided on the hydrolysis kettle 120 hydrolysis stirring 121, by the mixed liquor discharging pump 114 pump Lai sodium carbonate
With lime nitrogen mixed liquor by the hydrolysis kettle 120 top enter the hydrolysis kettle 120,20 DEG C~30 DEG C at a temperature of,
Under the stirring action of the hydrolysis stirring 121, reaction is hydrolyzed, after certain residence time, hydrolysis is completed, and reaction is completed
Hydrolyzate enter by flow by gravity or be pumped into the decalcification filter press 130, decalcification processing is carried out to hydrolysis liquid.
It is provided with hydrolyzate pressure-filtering tank 131 before the decalcification filter press 130, is provided on the hydrolyzate pressure-filtering tank 131
Homogeneous stirring 132 and filters pressing feed pump 133, the hydrolyzate for reacting completion enter by flow by gravity or are pumped into the hydrolysis
Hydraulic filter tank 131, it is described have carry out second homogenate under 132 effect of homogeneous stirring, and by the filters pressing feed pump 133 by institute
It states the hydrolyzate in hydrolyzate pressure-filtering tank 131 and is pumped to the decalcification filter press 130, carry out filters pressing.After filters pressing, filtrate is delivered to
It stores and collects in the cyanamide intermediate storage tank 140, be provided with cyanamide discharging pump on the cyanamide intermediate storage tank 140
141, the cyanamide discharging pump 141 is used to pump the decalcification filtrate containing cyanamide of the cyanamide intermediate storage tank 140
To the amination unit 200, the raw material as aminating reaction.Filter residue is outer afterwards after further treatment to drain into deslagging factory.
Further, the lime nitrogen hydrolysis unit 100 further includes having filter residue mashing tank 150, secondary filter press 160 and filter
Liquid bath 170, the filter residue, which is beaten on tank 150, is provided with water inlet pipe 151, mashing stirring 152 and secondary filter press feed pump 153,
Lime nitrogen hydrolyzate enters the filter residue through 130 filters pressing of decalcification filter press, the filter residue containing high concentration calcium carbonate of generation
It is beaten in tank 150, industry water is added by the water inlet pipe 151, carry out mashing water under the action of mashing stirring 152
It washes, the lime nitrogen and sodium carbonate of the cyanamide adhered on calcium carbonate and non-complete hydrolysis is separated with calcium carbonate turbid, starch
Filter residue after change is pumped to the secondary filter press 160 via the secondary filter press feed pump 153 and carries out filters pressing, after filters pressing
Filtrate is delivered in the filtrate receiver 170 and recycles, and deslagging factory is drained into outside filter residue.
Further, filtrate discharging pump 171 is provided on the filtrate receiver 170, the lime nitrogen hydrolysis unit 100 is also wrapped
Sodium carbonate liquid pool 180 is included, sodium carbonate feed pipe 181, the stirring of sodium carbonate homogeneous are provided on the sodium carbonate liquid pool 180
182 and sodium carbonate discharging pump 183, the secondary filters pressing filtrate that the filtrate discharging pump 171 stores the filtrate receiver 170 be pumped to
The sodium carbonate liquid pool 180 is added via the sodium carbonate feed pipe 181 into the sodium carbonate liquid pool 180 suitable
Sodium carbonate solid, and sodium carbonate liquor, the sodium carbonate discharging pump are prepared under the action of sodium carbonate homogeneous stirring 182
183 outlet connects the sodium carbonate feed pipe 112, will be in sodium carbonate liquor with being pumped to the mixing pond 110.
The lime nitrogen hydrolysis unit 100 realizes the independent hydrolysis of lime nitrogen, and by most of calcium after independent hydrolysis from
Son is detached from from reaction system, so that calcium ion content in waste water is significantly reduced, so that carbendazim wastewater is returned with recycling
Receive the possibility utilized.Secondly, generated filter residue carries out mashing washing after filters pressing of hydrolyzate, and by the secondary filter press
Water lotion caused by 160 filters pressings is for configuring sodium carbonate liquor, thus return to this part water lotion in reaction system,
Reaction is participated in, the lime nitrogen and sodium carbonate of the cyanamide adhered on calcium carbonate and non-complete hydrolysis has not only been recycled, has mentioned
The utilization rate of high raw material, and the yield of waste water is reduced, achieve good environmental benefit.
Please together referring to Fig. 3, the amination unit 200 receives the cyanamide that the lime nitrogen hydrolysis unit 100 pumps out
And methylchloroformate and liquid alkaline, aminating reaction is completed, and aminating reaction liquid is exported to the condensation unit 300.
Specifically, amination unit 200 includes amination kettle 210, methylchloroformate feed surge tank 220, liquid alkaline feed surge
Tank 230, methylchloroformate storage tank 240 and liquid alkaline storage tank 250 are provided with methylchloroformate on the methylchloroformate storage tank 240
Feed pump 241 is provided with liquid alkaline feed pump 251, the discharging of the methylchloroformate feed pump 241 on the liquid alkaline storage tank 250
End connects the methylchloroformate feed surge tank 220, and it is slow that the discharge end of the liquid alkaline feed pump 251 connects the liquid alkaline charging
Tank 230 is rushed, the amination kettle 210 connects the methylchloroformate feed surge tank 220 and the liquid alkaline feed surge tank 230,
With receive the methylchloroformate being added dropwise by the methylchloroformate feed surge tank 220 and the liquid alkaline feed surge tank 230 and
Liquid alkaline.
Refrigeration collet 211 is provided on the amination kettle 210, the refrigeration collet 211 is freezed using cooling water.Institute
State and be additionally provided with amination stirring 212 on amination kettle, by the lime nitrogen hydrolysis unit 100 pump containing high-concentration cyanamide
Hydrolyzate enters in the amination kettle 210, by adjusting the flow of cooling water, so that kettle temperature≤30 DEG C of the amination kettle 210,
It is dripped simultaneously by the methylchloroformate feed surge tank 220 and the liquid alkaline feed surge tank 230 into the amination kettle 210
Chlorination methyl formate and liquid alkaline, and aminating reaction occurs under 212 effect of amination stirring, after certain residence time, work as institute
When the pH value for stating amination liquid in amination kettle 210 is 7~8, aminating reaction terminates, and keeps the temperature 0.5h~2h.
The amination unit further includes cyanamide base intermediate storage tank 260, and 210 bottom of amination kettle is provided with the discharging of cyanamide base
The feed end of pump 213, the cyanamide base discharging pump 213 connects the amination kettle 210 and the cyanamide base intermediate storage tank 260,
And discharge end connects the condensation unit 300 and the cyanamide base intermediate storage tank 260.In 300 underload of condensation unit
When operation, temporarily aminating reaction liquid is stored in the cyanamide base intermediate storage tank 260, and high negative in the condensation unit 300
When lotus runs, the deficiency of the output energy of the amination unit 200 is supplemented.
Preferably, Weighing module 242 is additionally provided on the methylchloroformate feed surge tank 240, to monitor chloromethane
The dripping quantity of sour methyl esters.
Preferably, be additionally provided with nitrogen feed pipeline 214 on the amination kettle 210, with during aminating reaction, to
It is passed through nitrogen in the amination kettle 210, so that aminating reaction process carries out in the nitrogen atmosphere of circulation, guarantees reaction process
Securely and reliably.
Please together referring to Fig. 4, the condensation unit 300 receive the aminating reaction liquid exported by the amination unit 200 and
O-phenylenediamine, hydrochloric acid and formaldehyde complete condensation reaction, and condensation reaction solution are exported to the washing centrifugal unit 400.
Specifically, the condensation unit 300 includes condensation kettle 310, is provided with cyanamide base feed pipe on the condensation kettle 310
311, o-phenylenediamine feed pipe 312, formaldehyde feed pipe 313, hydrochloric acid feed pipe 314 and condensation stirring 315, the cyanamide base charging
Pipe 311 connects the cyanamide base discharging pump 213, and the aminating reaction liquid that aminating reaction generates is pumped by the cyanamide base discharging pump 213
Out, enter in the condensation kettle 310 through the cyanamide base feed pipe 311, and enter institute with by the o-phenylenediamine feed pipe 312
The o-phenylenediamine in condensation kettle 310 is stated, the formaldehyde of the condensation kettle 310 is entered by the formaldehyde feed pipe 313, by the hydrochloric acid
Feed pipe 314 enters the mixed in hydrochloric acid of the condensation kettle 310, under 315 effect of condensation stirring, carries out condensation reaction, raw
At carbendazim crude liquid.The bottom of the condensation kettle 310 is provided with carbendazim crude liquid discharging pump 316, for condensation reaction to be completed,
The carbendazim crude liquid of generation is pumped to the washing centrifugal unit 400.
Further, the condensation unit 300 further includes having condensing tower 320, be provided on the condensing tower 320 gas phase into
Expects pipe 321, gas phase discharge nozzle 322 and lime set return pipe 323, the gas-phase feed pipe 321 and the lime set return pipe 323 connection
The condensation kettle 310, the gas phase discharge nozzle 322 connect gas processing device, and condensation reaction produces in the condensation kettle 310
Raw gaseous substance enters the condensing tower 320 via 320 bottom of condensing tower, is condensed, lime set is via the lime set
Return pipe 323 is back in the condensation kettle 310, and on-condensible gas is emitted into body processing equipment by the gas phase discharge nozzle 322
It centrally disposes.
Please together referring to Fig. 5, it is anti-that the washing centrifugal unit 400 receives the condensation exported by the condensation unit 300
Liquid is answered, carries out multi-stage water wash, and the wet carbendazim obtained after washing is delivered to the drying unit 500.
Specifically, the washing centrifugal unit 400 include sequentially connected water washing tank 410, belt vacuum filter 420,
Carbendazim is beaten tank 430 and carbendazim centrifuge 440.Washing desalted water, the water washing tank are filled in the water washing tank 410
Water lotion discharging pump 411 is provided on 410, the discharge end of the water lotion discharging pump 411 connects the belt vacuum filter
440, and there is at least two tie point, the belt vacuum filter on the traffic direction of the belt vacuum filter 440
440 receive by the carbendazim crude liquid that conveys of condensation unit 300, and the desalted water pumped out by the water lotion discharging pump 411,
Under the conditions of existing for the vacuum, washed.
After the completion of washing, filter cake is delivered to the carbendazim by the belt vacuum filter 440 and is beaten tank 430, and
Mashing is completed in the carbendazim mashing tank.Carbendazim slurry discharge pump 431, slurry are provided on the carbendazim mashing tank 430
Carbendazim slurries after change are pumped in the carbendazim centrifuge 440 via carbendazim slurry discharge pump 431, carry out from
Heart dehydration, obtains wet carbendazim.The washing water of 440 front end of belt vacuum filter enters wastewater disposal basin, carries out wastewater treatment
Outlet after operation.
The washing centrifugal unit 400 further includes centrifugation water collecting tank 450,440 rear end of belt vacuum filter
The centrifugal water of washing water and the carbendazim centrifuge 440 delivers into the centrifugation water collecting tank 450, and the centrifugal water is collected
Tank 450 is provided with centrifugal water discharging pump 451, and the discharge end of the centrifugal water discharging pump 451 connects the carbendazim and is beaten tank
430, the centrifugal water being centrifuged in water collecting tank 450 passes through carbendazim described in 451 pumped back of centrifugal water discharging pump and is beaten
Centrifugal water reuse is reduced the discharge amount of waste water by tank 430.
Further, the washing centrifugal unit 400 further includes being set to below 440 discharge port of carbendazim centrifuge
Wet carbendazim conveying device 460, centrifugation completed obtained wet carbendazim and is delivered to by the wet carbendazim conveying device 460
The drying unit 500 is dried.
Please together referring to Fig. 6, the drying unit 500 receives the wet carbendazim conveyed by the washing centrifugal unit 400,
And it is dried.
Specifically, the drying unit 500 includes fluidized bed dryer 510, cyclone dust collectors 520 and bag filter
530, the fluidized bed dryer 510 receives the wet carbendazim conveyed by the washing centrifugal unit 400, and connects with the air of heat
Drying is touched, the carbendazim after drying is discharged via the discharge gate of the fluidized bed dryer 510, and packaging transports.The whirlwind removes
Dirt device 520 and the bag filter 530 are connected in series in the top of the fluidized bed dryer 510, for collecting by described
The solid powder of the top discharge of fluidized bed dryer 510, and by exhaust collection outlet.
Please together referring to Fig. 7, in another specific embodiment of the invention, the carbendazim clean-production system 10
It further include tail gas absorption unit 600, the tail gas absorption unit 600 includes sequentially connected air-introduced machine 610, level-one caustic wash tower
620 and second level caustic wash tower 630, the arrival end of the air-introduced machine 610 be separately connected the lime nitrogen hydrolysis unit 100, the amine
Change unit 200, the condensation unit 300, the washing centrifugal unit 400 and the drying unit 500, it is raw to collect carbendazim
The tail gas generated during producing, and tail gas is made to pass sequentially through the level-one caustic wash tower 620 and the second level caustic wash tower 630 progress alkali
Wash discharge.
Specifically, 620 bottom of level-one caustic wash tower is provided with level-one alkali cleaning pump 621,630 bottom of second level caustic wash tower
It is provided with second level alkali cleaning pump 631, the outlet end of the air-introduced machine 610 is connected to the bottom of the level-one caustic wash tower 620, carbendazim
The tail gas generated in production process via the level-one caustic wash tower 620 bottom enter the level-one caustic wash tower 620, and with through institute
The lye contact washing of the reflux cycle of 621 pumping of level-one alkali cleaning pump is stated, the tail gas after washing states second level caustic wash tower via described
630, and washing is contacted with the lye of the reflux cycle of 631 pumping of second level alkali cleaning pump, by the qualified tail gas of secondary washing
Outlet.
Please together referring to Fig. 8, in another specific embodiment of the invention, the carbendazim clean-production system 10
Further include water treatment unit 700, the water treatment unit 700 include sequentially connected decoloration device 710, desalter 720 and
Biochemical reaction tank 730.
The decoloration device 710 receives the lime nitrogen hydrolysis unit 100, the amination unit 200, the condensation respectively
The waste water that unit 300, the washing centrifugal unit 400 and the drying unit 500 generate in process of production, carries out waste water
Decolorization, and the waste water after decoloration is delivered to the desalter.
Specifically, the decoloration device 710 is Fenton's reaction kettle, and waste water is tried through the decoloration device 710 with Fenton's reaction
Oxidation reaction occurs for agent, makes the phenol piperazine substance oxidative decoloration of macromolecular in waste water.
The desalter 720 receives the waste water after the decoloration conveyed by the decoloration device 710, to waste water after decoloration into
Row desalting processing, and waste water after desalination is delivered to the biochemical reaction tank 730.Specifically, the desalter 720 is MVR
Evaporator, decoloration waste water remove filter residue after the desalter 720 evaporation and concentration, through filters pressing, reduce the salt content in waste water.
Desalinization wastewater enters the biochemical reaction tank 730.
The biochemical reaction tank 730 receives waste water after the desalination conveyed by desalter 720, to waste water after desalination into
Row biochemical treatment reduces the indexs such as COD and the ammonia nitrogen in waste water, and the qualified waste water after biochemical treatment is delivered to municipal wastewater
Pipe network.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and wants according to right of the present invention
Made equivalent variations is sought, is still belonged to the scope covered by the invention.
Claims (10)
1. a kind of carbendazim clean-production system, which is characterized in that including sequentially connected lime nitrogen hydrolysis unit, amination list
Member, condensation unit, washing centrifugal unit and drying unit；
The lime nitrogen hydrolysis unit receives lime nitrogen and sodium carbonate, carries out independent hydrolysis to lime nitrogen, generates cyanamide, and will
Cyanamide is delivered to the amination unit；
The amination unit receive the cyanamide that the lime nitrogen hydrolysis unit pumps out and extraneous conveying methylchloroformate and
Liquid alkaline completes aminating reaction, and aminating reaction liquid is exported to the condensation unit；
The condensation unit receive aminating reaction liquid export by the amination unit and the extraneous o-phenylenediamine conveyed, hydrochloric acid and
Formaldehyde completes condensation reaction, and condensation reaction solution is exported to the washing centrifugal unit；
The washing centrifugal unit is received by the condensation reaction solution of the condensation unit output, carries out multi-stage water wash, and by water
The wet carbendazim obtained after washing is delivered to the drying unit；
The drying unit is received by the wet carbendazim of the washing centrifugal unit conveying, and is dried.
2. carbendazim clean-production system as described in claim 1, which is characterized in that the lime nitrogen hydrolysis unit include according to
The mixing of secondary connection ground pond, hydrolysis kettle, decalcification filter press and cyanamide intermediate storage tank；
Be provided with to the mixing mixing stirring on pond, the mixing pond receive lime nitrogen and sodium carbonate liquor, described mixed
Expect to be uniformly mixed under the stirring action of stirring, and the mixed liquor of lime nitrogen and sodium carbonate is pumped to the hydrolysis kettle；
The hydrolysis kettle receives the lime nitrogen of by the mixing pond pumping and the mixed liquor of sodium carbonate, completes lime nitrogen hydrolysis,
And hydrolyzate is delivered to the decalcification filter press；
The decalcification filter press receives the hydrolyzate conveyed by the hydrolysis kettle, carries out filters pressing to hydrolyzate, separates cyanamide, and
Cyanamide is delivered to cyanamide intermediate storage tank；
The cyanamide intermediate storage tank receives and temporarily stores the cyanamide conveyed by the decalcification filter press, and cyanamide is pumped
It send to the amination unit.
3. carbendazim clean-production system as claimed in claim 2, which is characterized in that the lime nitrogen hydrolysis unit further includes
Sequentially connected filter residue mashing tank, secondary filter press and filtrate receiver, the filter residue that the mashing tank connects the decalcification filter press go out
Mouthful；
The mashing tank receives the filter residue from the decalcification filter press, is beaten to filter residue, and slurries is delivered to described
Secondary filter press；
The secondary filter press is received by the slurries of the mashing tank conveying, carries out filters pressing to slurries, and filtrate is delivered to institute
Filtrate receiver is stated, filter residue is delivered to deslagging factory；
The filtrate receiver receives the filtrate from secondary filter press, and by filtrate with being pumped to mixing pond.
4. carbendazim clean-production system as described in claim 1, which is characterized in that the amination unit include amination kettle and
The methylchloroformate feed surge tank and liquid alkaline feed surge tank being connect with the amination kettle, the methylchloroformate feed surge
Tank receives methylchloroformate charging and methylchloroformate is added dropwise to the amination kettle, and the liquid alkaline feed surge tank receives liquid alkaline
Feed and liquid alkaline be added dropwise to the amination kettle, the amination kettle receive by the hydrolysis unit pump Lai cyanamide and described
The liquid alkaline that the methylchloroformate and the liquid alkaline feed surge tank that methylchloroformate feed surge tank is added dropwise are added dropwise, it is anti-to complete amination
It answers, and aminating reaction liquid is exported to the condensation unit.
5. carbendazim clean-production system as claimed in claim 4, which is characterized in that the methylchloroformate feed surge tank
On be provided with Weighing module.
6. carbendazim clean-production system as claimed in claim 4, which is characterized in that be provided on the amination kettle nitrogen into
Expects pipe line.
7. carbendazim clean-production system as described in claim 1, which is characterized in that the condensation unit includes condensation kettle,
The condensation kettle is received to be fed by the aminating reaction liquid and hydrochloric acid, o-phenylenediamine and formaldehyde of the amination unit transportation, completes contracting
Reaction is closed, generates carbendazim crude liquid, and carbendazim crude liquid is delivered to the washing centrifugal unit.
8. carbendazim clean-production system as described in claim 1, which is characterized in that the washing centrifugal unit includes successively
Water washing tank, belt vacuum filter, the carbendazim of connection are beaten tank and carbendazim centrifuge, are filled with washing in the water washing tank
With desalted water, the belt vacuum filter is received by the carbendazim crude liquid of the condensation unit transportation and by the water washing device
The desalted water of pumping under the conditions of existing for the vacuum, completes the washing to carbendazim crude liquid, and the carbendazim that washing is completed is defeated
It is fed into the carbendazim mashing tank；
Carbendazim mashing tank receive by the belt vacuum filter convey Lai carbendazim solid, add water to starch carbendazim
Change, and the carbendazim after pulp is delivered to the carbendazim centrifuge；
The carbendazim centrifuge receives the carbendazim of the pulp by carbendazim mashing tank conveying, is centrifuged, obtains
The drying unit is delivered to wet carbendazim, and by wet carbendazim.
9. carbendazim clean-production system as described in claim 1, which is characterized in that it further include tail gas absorption unit,
The tail gas absorption unit includes sequentially connected air-introduced machine, level-one caustic wash tower and second level caustic wash tower, the air-introduced machine
Arrival end be separately connected the lime nitrogen hydrolysis unit, the amination unit, the condensation unit, the washing centrifugal unit and
The drying unit to collect the tail gas generated in carbendazim production process, and makes tail gas pass sequentially through the level-one caustic wash tower
And the second level caustic wash tower carries out alkali cleaning discharge.
10. carbendazim clean-production system as described in claim 1, which is characterized in that it further include water treatment unit, the water
Processing unit includes sequentially connected decoloration device, desalter and biochemical reaction tank；
The decoloration device receives the lime nitrogen hydrolysis unit, the amination unit, the condensation unit, the washing respectively
The waste water that centrifugal unit and the drying unit generate in process of production carries out decolorization to waste water, and will be after decoloration
Waste water is delivered to the desalter；
The desalter receives the waste water after the decoloration conveyed by the decoloration device, carries out at desalination to waste water after decoloration
Reason, and waste water after desalination is delivered to the biochemical reaction tank；
The biochemical reaction tank receives waste water after the desalination by desalter conveying, carries out at biochemistry to waste water after desalination
Reason, and the waste water after biochemical treatment is delivered to municipal sewage pipe network.
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Cited By (1)
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| CN115301711A (en) * | 2022-08-04 | 2022-11-08 | 江山市虎鼎环保科技有限公司 | Anti-blocking method for washing and filter pressing fly ash |
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