CN109574088A - The method and its application of iron black removal product removal of impurities are produced using waste - Google Patents
The method and its application of iron black removal product removal of impurities are produced using waste Download PDFInfo
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- CN109574088A CN109574088A CN201811414849.8A CN201811414849A CN109574088A CN 109574088 A CN109574088 A CN 109574088A CN 201811414849 A CN201811414849 A CN 201811414849A CN 109574088 A CN109574088 A CN 109574088A
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- iron black
- filter press
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- high pressure
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- UCNNJGDEJXIUCC-UHFFFAOYSA-L hydroxy(oxo)iron;iron Chemical compound [Fe].O[Fe]=O.O[Fe]=O UCNNJGDEJXIUCC-UHFFFAOYSA-L 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000002699 waste material Substances 0.000 title claims abstract description 32
- 239000012535 impurity Substances 0.000 title claims abstract description 19
- 238000004140 cleaning Methods 0.000 claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 150000003839 salts Chemical class 0.000 claims abstract description 37
- 238000002425 crystallisation Methods 0.000 claims abstract description 24
- 230000008025 crystallization Effects 0.000 claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 19
- 238000001704 evaporation Methods 0.000 claims abstract description 18
- 230000008020 evaporation Effects 0.000 claims abstract description 18
- 239000002351 wastewater Substances 0.000 claims abstract description 16
- 239000012528 membrane Substances 0.000 claims abstract description 15
- 239000012267 brine Substances 0.000 claims abstract description 13
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 30
- 238000005406 washing Methods 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 238000005360 mashing Methods 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 4
- 239000008399 tap water Substances 0.000 claims description 4
- 235000020679 tap water Nutrition 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000047 product Substances 0.000 description 49
- 238000005554 pickling Methods 0.000 description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 16
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 12
- 239000010802 sludge Substances 0.000 description 11
- 235000019270 ammonium chloride Nutrition 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 8
- 239000002253 acid Substances 0.000 description 7
- 239000013078 crystal Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 229910017053 inorganic salt Inorganic materials 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 239000012065 filter cake Substances 0.000 description 4
- 235000021110 pickles Nutrition 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 239000000908 ammonium hydroxide Substances 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 229910001448 ferrous ion Inorganic materials 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- HWSZZLVAJGOAAY-UHFFFAOYSA-L lead(II) chloride Chemical compound Cl[Pb]Cl HWSZZLVAJGOAAY-UHFFFAOYSA-L 0.000 description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000011592 zinc chloride Substances 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229960004887 ferric hydroxide Drugs 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G49/00—Compounds of iron
- C01G49/02—Oxides; Hydroxides
- C01G49/08—Ferroso-ferric oxide [Fe3O4]
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The present invention provides a kind of method for producing iron black removal product removal of impurities using waste, setting three-level first washes high pressure plate and frame filter press filter press and level-one offline and washes high pressure plate and frame filter press filter press online；Secondly interior setting hollander tub and dashpot are washed offline in every level-one, to facilitate every level-one ejected wash water to be sufficiently mixed with iron black product, improve cleaning effect；Iron black product once passes through that three-level clean offline and level-one on-line cleaning, ejected wash water enter cleaning system by the way of inversely entering, by on-line cleaning end using forward feeding mode again, then inversely by every level-one membrane off-line cleaning system；The Rinsing Area water outlet of afterbody membrane off-line cleaning system can recycle the salt in waste water with industrial value with whereabouts evaporation and crystallization system.Using the present invention while improving iron black product quality, it can also be combined with evaporative crystallization technique and the salt for accounting for bulk composition in waste water is formed into industrialization product by Crystallization Separation, thoroughly solve the problems, such as brine waste.
Description
Technical field
The present invention relates to a kind of environmental protection waste resource technology field more particularly to a kind of utilization waste hydrochloric acid and scrap iron
When skin produces iron oxide black pigment, the method for impurity in the iron black product of removal.
Background technique
In steel industry metal product process, surface of metal product has the presence of a large amount of iron scale, is
Guarantee going on smoothly for subsequent various manufacturing procedures, it is necessary to the iron scale of surface of metal product is removed using acid cleaning process
Fall.And in acid cleaning process, after the ferrous ion concentration that the iron scale dissolved in acid solution is formed accumulates to a certain extent,
Pickling solution can not just reach technique and require and become pickle liquor, be named as danger wastes and need specially treated.Made of metal
It needs to be cleaned up acid solution remained on surface with clear water after the completion of product pickling, avoids having an impact subsequent process equipment,
The low pH of the waste water generated in cleaning process and contain a large amount of ferrous ions, it is necessary to handle it is up to standard after discharge again.Processed
It is all made of in journey plus alkali is adjusted, both the pH of adjustable waste water to neutrality, the OH in lye-It can be with the ferrous ion in waste water
Reaction is generated, under conditions of aerating oxidation, is oxidized to ferric hydroxide precipitate, is gone eventually by precipitating or filtering technique
It removes, final pickling waste waters can be with qualified discharge, but the pickling sludge formed can mix Zn, Pb and Ni because of metal product production technology
Etc. heavy metal ion, to be named as danger wastes.
Pickle liquor and the joint disposition of pickling sludge are produced by iron oxide black pigment, pickle liquor and acid using hydrometallurgical technology
It washes sludge and contains many impurity, such as ZnCl2、PbCl2、NaCl、MgCl2, NHCl etc..Above-mentioned impurity directly affects production tapping
The product indexs such as iron content, water soluble chloride, water solubles content and the coloration of black product cause iron black product price cheap.
The rinsing bowl that prior art is usually used 3-5 grades constantly cleans iron oxide black pigment, removes in iron black product
ZnCl2、PbCl2、NaCl、MgCl2, the impurity such as NHCl to improve iron black product quality improve product price.But traditional scheme one
What aspect wash by, and cleaning water consumption is especially big；On the other hand the impurity to get up under cleaning contains a large amount of inorganic salts,
It beyond national related drain standard, needs individually to handle, increases operating cost.
Summary of the invention
For the problem that water waste existing for status technology and brine waste processing are difficult, the present invention provides a kind of waste
The iron black method for removing product removal of impurities of production, after the present invention is suitable for producing iron oxide black using pickle liquor and pickling sludge, to iron
Black product carries out removal of impurities rinsing, can not only save a large amount of originally water resource, but also can solve the processing problem of brine waste, real
It now reduces the operating cost of iron black product and improves the purpose that water resource utilizes.Iron black product quality is being improved using the present invention
At the same time it can also combine with evaporative crystallization technique, the salt for accounting for bulk composition in waste water is formed into industry by Crystallization Separation
Change product, thoroughly solves the problems, such as brine waste.
To solve above-mentioned technical problem, the invention discloses following technology contents:
A kind of method of the iron black removal product removal of impurities of waste production, it is characterised in that carried out by following step:
(1) firstly, setting three-level washes high pressure plate and frame filter press and level-one offline and washes high pressure plate and frame filter press online；
(2) interior setting hollander tub and dashpot are washed offline in every level-one, to facilitate every level-one ejected wash water and iron black product sufficiently mixed
It closes；
(3) iron black product once passes through three-level using forward feeding mode and cleans offline and level-one on-line cleaning, ejected wash water use
The mode inversely entered enters cleaning system by on-line cleaning end, then inversely passes through every level-one membrane off-line cleaning system；
(4) the Rinsing Area water outlet of level-one membrane off-line cleaning system can recycle the salt in waste water with whereabouts evaporation and crystallization system；
Wherein the level-one is washed high pressure plate and frame filter press online and is referred to:
Salinity on-line monitoring instrument is set on drainage pipeline, after draining the quality requirements of the iron black product of salt content satisfaction
(200mg/L) stops cleaning；This system setting feeding pump washes high pressure plate and frame filter press and type washing trough online；Wherein cleaning system
For the ejected wash water of system from the desalted water or tap water of the evaporation and crystallization system of subsequent handling, ejected wash water is directly entered washes height online
The cleaning water inlet of plate frame filter press carries out on-line cleaning to iron black product；
The three-level is washed high pressure plate and frame filter press offline and is referred to:
Feeding: the iron black suspension discharged by upper level reaction process is promoted to by pneumatic diaphragm pump and washes high pressure sheet frame pressure offline
Filter is separated by solid-liquid separation；
It is separated by solid-liquid separation: being separated by solid-liquid separation by washing high pressure plate and frame filter press offline, the concentration salt water separated enters subsequent
Evaporation and crystallization system, the first order wash the liquid that high pressure plate and frame filter press sub-department comes offline and enter evaporation and crystallization system, and subsequent two
Fraction enters type washing trough in case upper level cleaning uses, into the hollander tub of upper level cleaning system, iron come liquid out
Black cake enters hollander tub；
Mashing: being pre-filled with the ejected wash water that next stage is separated in hollander tub, is separated by solid-liquid separation through offline high pressure plate and frame filter press
Afterwards, iron black cake gradually enters hollander tub, carries out continuous mixing, guarantees that iron black and ejected wash water mitigates uniformly, subsequently into slurries material
Stock tank；
Storage: having hollander tub to carry out entering slurry vessel after iron black and ejected wash water is sufficiently mixed and temporarily store, when reaching certain liquid level
Next stage is promoted to by pneumatic diaphragm pump after (determination according to storage tank size) and washes high pressure plate and frame filter press offline.
Evaporation and crystallization system of the present invention refers to the subsequent another set of desalting system for brine waste, will give up
Salinity in water is converted to solid, and the water of recycling internal can be applied.
The present invention further discloses wastes to produce iron black removal product impurity-removing method inorganic using brine waste production
Application in terms of salt.The present invention, which is further disclosed, produces iron black removal product impurity-removing method useless using saliferous using waste
Application in terms of aquatic production inorganic salts, experimental result are shown: after producing iron black product using pickling waste hydrochloric acid and pickling sludge
Rinse engineering.The iron black mixed liquor produced, iron black solid 9.4 tons of weight of production, is made using ammonium hydroxide by 156 tons of mixed liquor total amount
To neutralize alkaline agent, 13.2 tons of inorganic salt content in mixed liquor, wherein about 11.8 tons of ammonium chloride content.
More detailed description of the present invention is as follows:
Firstly, setting three-level washes high pressure plate and frame filter press filter press and level-one offline and washes high pressure plate and frame filter press filter press online；
Secondly, interior setting hollander tub and dashpot are washed offline in every level-one, to facilitate every level-one ejected wash water to be sufficiently mixed with iron black product,
Improve cleaning effect；Again, iron black product using forward feeding mode once pass through three-level clean offline with level-one grade it is clear online
It washes, ejected wash water enters cleaning system by the way of inversely entering, by on-line cleaning end, then inversely clear offline by every level-one
Wash system；Finally, the Rinsing Area water outlet of level-one membrane off-line cleaning system can be with whereabouts evaporation and crystallization system, recycling has work in waste water
The salt of industry value.Specific step is as follows:
Membrane off-line cleaning system (three-level):
Feeding: the iron black suspension discharged by upper level reaction process is promoted to by pneumatic diaphragm pump and washes high pressure sheet frame pressure offline
Filter is separated by solid-liquid separation.
It is separated by solid-liquid separation: being separated by solid-liquid separation by washing high pressure plate and frame filter press offline, the concentration salt water separated enters
Subsequent evaporation crystal system (wash the liquid that high pressure plate and frame filter press filter press sub-department comes offline and enter evaporative crystallization system by the first order
System, subsequent two fraction enter type washing trough in case upper level cleaning uses, into upper level cleaning system come liquid out
Hollander tub), iron black cake enters hollander tub.
Mashing: the ejected wash water that next stage is separated is pre-filled in hollander tub, through offline high pressure plate and frame filter press filters pressing
After machine is separated by solid-liquid separation, iron black cake gradually enters hollander tub, carries out continuous mixing, guarantees uniformly, then iron black and ejected wash water mitigates
Into slurries slurry vessel.
Storage: having hollander tub temporarily store after iron black and ejected wash water is sufficiently mixed into slurry vessel, certain when reaching
Next stage is promoted to by pneumatic diaphragm pump after liquid level and washes high pressure plate and frame filter press offline.
On-line cleaning system (level-one): the only setting feeding pump of this system washes high pressure plate and frame filter press and washing water online
Slot.Desalted water (or tap water) of the ejected wash water of the same level cleaning system from the evaporation and crystallization system of subsequent handling, ejected wash water
The cleaning water inlet for washing high pressure plate and frame filter press online is directly entered to iron black product progress on-line cleaning.High pressure sheet frame is washed online
Salinity on-line monitoring instrument is set on filter press drainage pipeline, is stopped after the quality requirements that draining salt content meets iron black product
Cleaning.
After producing iron black product using pickling waste hydrochloric acid and pickling sludge, remain in reaction solution
Influence problem of the ammonium chloride salinity to indexs such as product purity and colorations, high spot reviews impurity removed system is to ammonium chloride in product
Whether the removal efficiency of salinity can reach the GB standard of iron black product, and main difficult point is going for the every level-one of impurity removed system
Except the matching relationship of efficiency and total removal efficiency, guarantee finally to pass through on-line cleaning system, ammonium chloride is dense in the cleaning solution of discharge
Degree reaches the index of needs, cleaning water needed for successively having investigated every level-one thus, the mixing intensity of refining system and time,
The conditions such as on-line cleaning system institute water requirement intensity and scavenging period.
The method disclosed by the invention for producing iron black removal product removal of impurities using waste is possessed compared with prior art
It has the active effect that
The present invention solves the problems, such as that traditional iron black cleaning process water resource consumption is big, can reduce iron black production cost, especially
It in current water resource anxiety and country is advocated water saving art and energetically in the environment of equipment, have extraordinary economic benefit and
Environmental benefit；Meanwhile the present invention changes the running route of conventional cleaning process water resource, plays inorganic in concentration ejected wash water
The function of salt, so that the recycling of ejected wash water is achieved, the ejected wash water finally discharged can carry out desalinating process, by ejected wash water
In inorganic salts separate in solid form, the ejected wash water after separation can be recycled in system, reach ejected wash water most
The purpose of " zero-emission " eventually, plays the purpose for further saving water resource, while solving the big difficulty of ejected wash water processing difficulty
Topic, environmental benefit and social benefit with highly significant.
Mentality of designing of the invention is: it is produced in iron black production process using pickling waste hydrochloric acid and pickling sludge, it is raw
At iron black mixed liquor in containing a large amount of chlorine root inorganic salts if directly being dehydrated remain inorganic salts in the product
It will have a direct impact on the product indexs such as iron content, water soluble chloride, water solubles content and the coloration of iron black product, lead to iron black production
Product are cheap.Mainly there are two sources for the generation of above-mentioned chlorine root inorganic salts: first is that pickling sludge is due to pickling waste waters processing
And generate, calcium hydroxide medicament can be added in pickling waste waters processing engineering carries out acid-base neutralization reaction, thus meeting in acid sludge
Bring the salts impurity such as calcium chloride into；Second is that iron black production technology must react under alkaline condition, pickling waste hydrochloric acid and pickling
After sludge mixing, mixed liquor is still in acid, it is necessary to add a large amount of lye (NaOH or ammonium hydroxide) into mixed liquor, thus generate
A large amount of chlorine root inorganic salts, the part inorganic salts account for the major part about 90% or more of inorganic salts in mixed liquor.
90% or more the composition of inorganic salts in iron black mixed liquor is the part inorganic salts tool due to adding alkali neutralization to generate
Have the characteristics that ingredient is relatively easy, environmental pollution is big, it is necessary to be handled and otherwise be had an immense impact on to environment.For inorganic salts
Processing mainly uses evaporative crystallization technique, and inorganic salts is made to be converted into crystal grain, then carries out filling or following as industrial goods
Ring utilizes.Traditional iron black cleaning makes the brine waste amount generated big by the way of, and inorganic salt concentration is low, causes evaporative crystallization
Process operation cost is big, realizes difficult disadvantage.The present invention devises a set of reverse-flow rinsing process, can be by the dense of brine waste
Degree is promoted to the 70%-80% with iron black mixed liquid concentration, and the poaching wastewater of generation enters together with the waste water after mixed liquor filters pressing
Evaporative crystallization technique produces inorganic salts.
Detailed description of the invention
Fig. 1 is a kind of process flow diagram for the method that iron black removal product removal of impurities is produced using waste of the present invention.
Specific embodiment
The present invention is described below by specific embodiment.Unless stated otherwise, technological means used in the present invention
It is method known in those skilled in the art.In addition, embodiment is interpreted as illustrative, it is not intended to limit the present invention
Range, the spirit and scope of the invention are limited only by the claims that follow.To those skilled in the art, without departing substantially from this
Under the premise of invention spirit and scope, to the various changes or change of material component and dosage progress in these embodiments
It belongs to the scope of protection of the present invention.The raw materials used in the present invention and reagent are commercially available.Used equipment is for example steamed in the present invention
It is all commercially available to send out crystal system, high pressure plate and frame filter press etc., high pressure sheet frame has the commercial equipment of sizing).With reference to the accompanying drawing
Implementation process of the invention is illustrated.
Embodiment 1
A kind of method of the iron black removal product removal of impurities of waste production:
(1) firstly, setting three-level washes high pressure plate and frame filter press and level-one offline and washes high pressure plate and frame filter press online；The level-one
Membrane off-line cleaning system: high pressure plate and frame filter press and type washing trough are washed online；The ejected wash water of cleaning system is from subsequent handling
The desalted water or tap water of evaporation and crystallization system, ejected wash water are directly entered the cleaning water inlet pair for washing high pressure plate and frame filter press online
Iron black product carries out on-line cleaning.Certain iron and steel enterprise is selected to produce the drift after iron black product using pickling waste hydrochloric acid and pickling sludge
Wash engineering.
(2) interior setting hollander tub and dashpot are washed offline in every level-one, to facilitate every level-one ejected wash water to fill with iron black product
Divide mixing, improves cleaning effect.
(3) iron black product once passes through three-level using forward feeding mode and cleans offline and level-one on-line cleaning, ejected wash water
By the way of inversely entering, cleaning system is entered by on-line cleaning end, then inversely passes through every level-one membrane off-line cleaning system；
(4) the Rinsing Area water outlet of level-one membrane off-line cleaning system can recycle the salt in waste water with whereabouts evaporation and crystallization system.
Wherein the three-level is washed offline:
Feeding: the iron black suspension discharged by upper level reaction process is promoted to by pneumatic diaphragm pump and washes high pressure sheet frame pressure offline
Filter is separated by solid-liquid separation.
It is separated by solid-liquid separation: being separated by solid-liquid separation by washing high pressure plate and frame filter press offline, the concentration salt water separated enters
Subsequent evaporation crystal system, the first order wash the liquid that high pressure plate and frame filter press filter press sub-department comes offline and enter evaporative crystallization system
System, subsequent two fraction enter type washing trough in case upper level cleaning uses, into upper level cleaning system come liquid out
Hollander tub, iron black cake enter hollander tub.
Mashing: the ejected wash water that next stage is separated is pre-filled in hollander tub, through offline high pressure plate and frame filter press filters pressing
After machine is separated by solid-liquid separation, iron black cake gradually enters hollander tub, carries out continuous mixing, guarantees uniformly, then iron black and ejected wash water mitigates
Into slurries slurry vessel.
Storage: having hollander tub temporarily store after iron black and ejected wash water is sufficiently mixed into slurry vessel, certain when reaching
Next stage is promoted to by pneumatic diaphragm pump after liquid level and washes high pressure plate and frame filter press offline；The iron black mixed liquor produced, mixed liquor
156 tons of total amount, iron black solid 9.4 tons of weight of production, use ammonium hydroxide as neutralization alkaline agent, inorganic salt content 13.2 in mixed liquor
Ton, wherein about 11.8 tons of ammonium chloride content.
Embodiment 2
As shown in the picture, the present invention is using the method that waste produces iron black removal product removal of impurities:
Firstly, iron black mixed liquor successively passes through level-one membrane off-line cleaning system, second level membrane off-line cleaning system, three-level membrane off-line cleaning system
With the on-line cleaning decorum.
Every grade of offline cleaning decorum includes to beat offline cleaning filter press, stock tank, slurry tank and type washing trough and attached mention
Rise pump.Iron black product filter-press dehydration in mixed liquor is formed the filter cake of moisture content 40% by offline cleaning filter press.
Filtrate after filters pressing that the filter cake that filter press generates is discharged with upper level is sufficiently mixed by hollander tub, dilution filter
Inorganic salt concentration in cake.
Slurry tank plays the role of dashpot, the i.e. iron black mixed liquor of storage hollander tub formation, in case elevator pump will mix
Liquid is promoted in next stage cleaning filter press.
Type washing trough is used to store the filtrate formed after upper level cleaning plate compression, and for diluting filter when the same level mashing
Inorganic salt concentration in cake.
By the following figure it is found that offline ejected wash water enters from the hollander tub of afterbody, water source uses desalted water, from evaporation
The steam condensate (SC) that crystal system generates, water consider by 4-8 times of filter cake weight, and inorganic salts cleaning in mud cake is reached mark
Standard is foundation, and then adverse current step by step cleans iron black filter cake, ammonium chloride strong brine is ultimately formed, into evaporative crystallization desalination
System.
Afterbody on-line cleaning sheet frame is the last control to iron black product salt content, using on-line cleaning sheet frame shape
Formula, desalted water enter plate and frame filter press by the on-line cleaning pipe of plate and frame filter press, and installation inorganic salts detect instrument on outlet pipeline,
Stop cleaning after the inorganic salt concentration of ejected wash water reaches standard, overall process carries out automatically.
After above-mentioned three-level membrane off-line cleaning system and level-one on-line cleaning system, salt content in iron black solid product can be with
Control meets the GB standard of iron black product within 0.3%.The concentration of the sal-ammoniac strong brine formed in simultaneity factor can be with
Reach 5% or so, changes the dilution water that strong brine a part can be back in iron black production, a part and the offline clean plate of level-one
The strong brine that frame generates is mixed into subsequent evaporation crystal system, realizes that the wastewater flow rate of iron black production discharges, inorganic in mixed liquor
13.2 tons of salt content, wherein about 11.8 tons of ammonium chloride content.
Claims (2)
1. a kind of method for producing iron black removal product removal of impurities using waste, it is characterised in that carried out by following step:
(1) firstly, setting three-level cleans high pressure plate and frame filter press and level-one on-line cleaning high pressure plate and frame filter press offline；
(2) interior setting hollander tub and dashpot are washed offline in every level-one, to facilitate every level-one ejected wash water and iron black product sufficiently mixed
It closes；
(3) iron black product successively passes through three-level using forward feeding mode and cleans offline and level-one on-line cleaning, ejected wash water use
The mode inversely entered enters cleaning system by on-line cleaning end, then inversely passes through every level-one membrane off-line cleaning system；
(4) Rinsing Area of level-one membrane off-line cleaning system is discharged whereabouts evaporation and crystallization system, recycles the salt in waste water；
Wherein the level-one is washed high pressure plate and frame filter press online and is referred to:
Salinity on-line monitoring instrument is set on drainage pipeline, 200mg/ after draining salt content and meeting the quality requirements of iron black product
L stops cleaning；This system setting feeding pump washes high pressure plate and frame filter press and type washing trough online；The wherein cleaning of cleaning system
For water from the desalted water or tap water of the evaporation and crystallization system of subsequent handling, ejected wash water is directly entered washes high pressure sheet frame pressure online
The cleaning water inlet of filter carries out on-line cleaning to iron black product；
The three-level is cleaned high pressure plate and frame filter press offline and is referred to:
Feeding: the iron black suspension discharged by upper level reaction process is promoted to offline cleaning high pressure sheet frame by pneumatic diaphragm pump
Filter press is separated by solid-liquid separation；
It is separated by solid-liquid separation: being separated by solid-liquid separation by cleaning high pressure plate and frame filter press offline, after the concentration salt water separated enters
Continuous evaporation and crystallization system, the first order washes the liquid that high pressure plate and frame filter press sub-department comes offline and enters evaporation and crystallization system, subsequent
Two fractions come liquid out enter type washing trough in case upper level cleaning uses, into the hollander tub of upper level cleaning system,
Iron black cake enters hollander tub；
Mashing: being pre-filled with the ejected wash water that next stage is separated in hollander tub, is separated by solid-liquid separation through offline high pressure plate and frame filter press
Afterwards, iron black cake gradually enters hollander tub, carries out continuous mixing, guarantees that iron black and ejected wash water mitigates uniformly, subsequently into slurries material
Stock tank；
Storage: being carried out entering slurry vessel after iron black and ejected wash water is sufficiently mixed temporarily storing by hollander tub, when reaching certain liquid level
Next stage is promoted to by pneumatic diaphragm pump after 2m and washes high pressure plate and frame filter press offline.
2. the iron black removal product impurity-removing method of waste production described in claim 1 is in terms of using brine waste production inorganic salts
Application.
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| JPS5335697A (en) * | 1976-09-14 | 1978-04-03 | Matsushita Electric Works Ltd | Improving method for thermostability of iron black |
| CN1382635A (en) * | 2002-06-11 | 2002-12-04 | 枝江开元化工有限责任公司 | Process for preparing iron oxide black from iron sludge generated in iron powder reduction technology |
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