DK153367B - PROCEDURE AND MEASURES FOR THE EFFECT OF DISPOSALS IN GAS WASHERS - Google Patents
PROCEDURE AND MEASURES FOR THE EFFECT OF DISPOSALS IN GAS WASHERS Download PDFInfo
- Publication number
- DK153367B DK153367B DK566776AA DK566776A DK153367B DK 153367 B DK153367 B DK 153367B DK 566776A A DK566776A A DK 566776AA DK 566776 A DK566776 A DK 566776A DK 153367 B DK153367 B DK 153367B
- Authority
- DK
- Denmark
- Prior art keywords
- polymer
- general formula
- molecular weight
- copolymer
- gas
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
- C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Treating Waste Gases (AREA)
- Detergent Compositions (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
iin
DK 153367BDK 153367B
Den foreliggende opfindelse angår en fremgangsmåde og et middel til modvirkning af aflejringer i gasvaskere.The present invention relates to a method and means for counteracting deposits in gas washers.
I de seneste år er antallet af vådvaskesystemer eller skrubbere, som er installeret til fjernelse af gasformige og partikelformige stoffer fra spild- og røggas, steget stærkt. Yderligere systemer af denne art er projekteret. Sådanne vådskrubbere anvendes til afgangsgas eller røg fra kedler, forbrændingsanstalter, kalkovne, støberier, højovne, basiske oxygenovne (BOF), åbne ovne, koksværker, kedler til udnyttelse af spild fra papirmøller, fabrikker for fremstilling af dyrefoder, elektriske ovne (stål og aluminium), smelteovne, asfaltfabrikker og mange andre.In recent years, the number of wet-cleaning systems or scrubbers installed to remove gaseous and particulate matter from waste and flue gas has increased significantly. Additional systems of this kind have been designed. Such wet scrubbers are used for exhaust gas or smoke from boilers, combustion plants, lime kilns, foundries, blast furnaces, basic oxygen furnaces (BOFs), open ovens, coke mills, boilers for waste paper mills, animal feed factories, electric furnaces (steel and aluminum) , smelting furnaces, asphalt mills and many others.
Et af de vigtigste træk ved et skrubbesystem er kontakt-kammeret, dvs. den del af anlægget, som udnyttes til at opnå en effektiv overføring af gasformige og/eller par-tikelformige stoffer fra gassen til vandfasen. De fleste vådskrubbere omfatter et venturikammer, et pakket lag, en med huller forsynet plade, et spraykammer eller et turbulentlag. Nogle systemer omfatter også to kontakt-kamre i serie, f.eks. et venturikammer efterfulgt af et spraykammer.One of the most important features of a scrubbing system is the contact chamber, ie. the part of the plant which is utilized to obtain an efficient transfer of gaseous and / or particulate matter from the gas to the aqueous phase. Most wet scrubbers include a venturi chamber, a packed layer, a hollow plate, a spray chamber or a turbulent layer. Some systems also include two contact chambers in series, e.g. a venturi chamber followed by a spray chamber.
Skrubbere eller vasketårne med venturikammer eller hulplader er sædvanligvis mere effektive til fjernelse af partikler, medens pakkede lag, turbulente lag og spraykamre sædvanligvis er mere effektive til fjernelse af gasformige komponenter, såsom SC^ og HF.Scrubbers or wash towers with venturi chambers or hollow plates are usually more effective at removing particles, while packed layers, turbulent layers and spray chambers are usually more effective at removing gaseous components such as SC 2 and HF.
Den foreliggende opfindelse er særlig rettet på sådanne skrubbersystemer, hvor der forekommer problemer med udfældninger og aflejringer som følge af uopløseligt cal-ciumcarbonat, calciumfluorid, jernoxid {Ve^Q^), siliciumoxid, manganoxid og fine partikler af jernmalm og slagger. Opfindelsen egner sig især til at løse problemer,The present invention is particularly directed to such scrubbing systems where there are problems with precipitation and deposits due to insoluble calcium carbonate, calcium fluoride, iron oxide (Ve 2 Q 2), silica, manganese oxide and fine iron ore and slag particles. The invention is particularly suitable for solving problems,
DK 153367BDK 153367B
2 som forekommer for gasskrubbere til højovne, hvor jernmalm omdannes eller forarbejdes til jern med højt kulindhold.2 which occurs for gas scrubbers for blast furnaces where iron ore is converted or processed into high-carbon iron.
Opfindelsen skal derfor især forklares i relation til drift af højovne.The invention must therefore be particularly explained in relation to the operation of blast furnaces.
Ved fremstilling af jern føres jernmalm sammen med andre bestanddele, såsom dolomit, ind i toppen af en højovn, som fyres med koks. En luftstrøm blæses opad fra bunden af ovnen gennem det smeltede materiale. Kulstoffet i koks reducerer jernmalmen (F^O^) til metallisk jern.In the manufacture of iron, iron ore, along with other constituents such as dolomite, is fed into the top of a blast furnace, which is fired with coke. An air stream is blown upwards from the bottom of the furnace through the molten material. The carbon in coke reduces the iron ore (F ^ O ^) to metallic iron.
Det smeltede jern tappes ud gennem bunden af ovnen, medens slaggen tappes ud fra midten af ovnen. Biproduktet ved reduktionen med carbon er en kombination af carbondioxid og carbonmonoxid, som reagerer med det tilstedeværende calcium under dannelse af en besværlig slagge, cal-ciumcarbonat og andre faste stoffer, såsom ler, slagge og fine partikler.The molten iron is discharged through the bottom of the furnace, while the slag is discharged from the center of the furnace. The by-product of the reduction with carbon is a combination of carbon dioxide and carbon monoxide which reacts with the calcium present to form a cumbersome slag, calcium carbonate and other solids such as clay, slag and fine particles.
Det vil forstås, at luftstrømmen, som blæses opad, i væsentlig grad bidrager til indholdet af urenheder i aftræksgassen, således at gasvaskesystemet belastes stærkt. Indholdet af faste stoffer i vaskemediet udgør 1 000 -2 000 dele per million som følge af indholdet af partikler i aftræksgassen.It will be appreciated that the air flow blowing upwards contributes substantially to the content of impurities in the exhaust gas so that the gas washing system is heavily loaded. The solids content of the detergent amounts to 1,000-2,000 parts per million due to the content of exhaust gas particles.
De anvendte skrubbere til rensning af højovnsgas er ofte af venturitypen, der behandler afgangsgassen fra ovnen.The scrubbers used to clean blast furnace gas are often of the venturi pen that processes the exhaust gas from the furnace.
Disse gasser indeholder betydelige mængder jernoxid, hvoraf de fine partikler føres med gasstrømmen. Endvidere findes fine kokspartikler og i mindre grad forekommer også partikelformede slaggematerialer, såsom silikater og ikke-forbrugt dolomit. Jernoxid har været underkastet en høj temperatur i ovnen og kan derfor findes på en sinterform med lav overfladeaktivitet. De fine partikler 3These gases contain significant amounts of iron oxide, of which the fine particles are fed with the gas stream. Furthermore, fine coke particles are found and to a lesser extent also particulate slag materials, such as silicates and non-consumed dolomite. Iron oxide has been subjected to a high temperature in the furnace and can therefore be found in a sinter form with low surface activity. The fine particles 3
DK 153367 BDK 153367 B
heraf medfører dog aflejringsproblemer i gasvaskeanlæg og forbindelsesrør.however, there are deposition problems in gas washing systems and connecting pipes.
Et andet eksempel på et anlæg er en basisk oxygenovn (BOF), som modtager smeltet metal fra højovnen plus skrap, forskellige legeringer til opnåelse af den ønskede sammensætning samt kalk og flusspat som flusmiddel.Another example of a plant is a basic oxygen furnace (BOF) which receives molten metal from the blast furnace plus scrap, various alloys to obtain the desired composition, as well as lime and flux as flux.
Oxygen indføres gennem et indføringshul for at fjerne urenheder. Ved oxygenindblæsning kan frigives 4,4 tons støv pr. 220 tons opvarmet materiale. Dette støv må fjernes fra spildgassen. Støvet består af jernoxid, kalk og fluorider.Oxygen is introduced through an insertion hole to remove impurities. By oxygen injection, 4.4 tonnes of dust can be released per day. 220 tons of heated material. This dust must be removed from the waste gas. The dust consists of iron oxide, lime and fluorides.
Partiklerne og de opløselige gasser fjernes fra spildgassen i vådskrubbere. I vaskevandet vil jernoxidet, calciumfluorid og calciumcarbonat samle sig og fremkalde massive aflejringer i det indre af vaskeanlæggene, som derved bliver ineffektive og kræver høje vedligeholdelsesomkostninger .The particles and soluble gases are removed from the waste gas in wet scrubbers. In the wash water, the iron oxide, calcium fluoride and calcium carbonate will accumulate, causing massive deposits in the interior of the washing plants, which will thereby become ineffective and require high maintenance costs.
Fra beskrivelsen til USA patentnr. 3 880 620 er det kendt at anvende udfældningsinhibitorer, dvs. uorganiske og organiske phosphater, samt lavmolekylære polymere dis-pergeringsmidlpr. Denne teknik har ikke vist sig helt effektiv til forhindring af aflejringer og har resulteret i forøgede behandlingsomkostninger og hyppige afbrydelser for mekanisk rensning.From the description to US patent no. 3,880,620, it is known to use precipitation inhibitors, i. inorganic and organic phosphates, as well as low molecular weight polymeric dispersants. This technique has not proven to be quite effective in preventing deposits and has resulted in increased processing costs and frequent interruptions for mechanical cleaning.
Den foreliggende opfindelse har til formål at tilvejebringe en fremgangsmåde og et middel til effektivt at forhindre aflejringer i gasvaskere, hvilken fremgangsmåde og hvilket middel er økonomiske og nedsætter hyppigheden af mekanisk rengøring til et minimum og er effektive over et bredt pH-område.The present invention has for its object to provide a method and means for effectively preventing deposits in gas washers, which method and means are economical and minimize the frequency of mechanical cleaning and are effective over a wide pH range.
44
DK 153367 BDK 153367 B
Dette opnås ved fremgangsmåden ifølge opfindelsen og med midlet ifølge opfindelsen.This is achieved by the method of the invention and by the agent of the invention.
Fremgangsmåden ifølge opfindelsen er af den i krav l's indledning angivne art, og den er ejendommelig ved det i krav l's kendetegnende del anførte.The method according to the invention is of the nature specified in the preamble of claim 1 and is characterized by the characterizing part of claim 1.
Midlet ifølge opfindelsen er af den i krav 2's indledning angivne art, og det er ejendommeligt ved det i krav 2's kendetegnende del anførte.The composition according to the invention is of the nature specified in the preamble of claim 2 and is peculiar to the characterizing part of claim 2.
Særligt foretrukne forbindelser med den i kravene angivne almene formel II er amino-tris(methylenphosphorsyre) og hydroxyethyliden-1,1-diphosphonsyre (HEDP) og vandopløselige salte deraf.Particularly preferred compounds of the general formula II as claimed are aminotris (methylene phosphoric acid) and hydroxyethylidene-1,1-diphosphonic acid (HEDP) and water-soluble salts thereof.
Egnede phosphater med formlen III er beskrevet i USA patentskrifterne 2 337 856, 2 906 599 og 3 213 017.Suitable phosphates of formula III are disclosed in U.S. Patent Nos. 2,337,856, 2,906,599, and 3,213,017.
Egnede højmolekylære polymere omfatter ikke-ioniske og anioniske vandopløselige polymere med en molvægt på mindst 100 000, fortrinsvis mindst 1 000 000. Eksempler på egnede polymere omfatter polyacrylamider, såsom de, der er kendt fra USA patentskrift nr. 3 085 916, polymere af 2-acrylamido-methylpropansulfonsyre som angivet i USA patentskrift nr.Suitable high molecular weight polymers include nonionic and anionic water-soluble polymers having a molecular weight of at least 100,000, preferably at least 1,000,000. Examples of suitable polymers include polyacrylamides such as those known from United States Patent No. 3,085,916, polymers of 2 -acrylamido-methylpropanesulfonic acid as disclosed in U.S. Pat.
3 709 816, og sulfonerede polystyrener som angivet i USA patentskrift nr. 3 630 937.No. 3,709,816, and sulfonated polystyrenes as disclosed in U.S. Patent No. 3,630,937.
Opfindelsen skal i det følgende illustreres nærmere ved hjælp af nogle eksempler.The invention will be further illustrated by the following examples.
EKSEMPEL 1 10 ppm af en blanding indeholdende en højmolekylær copolymer af 2-acrylamidomethylpropansulfonsyre og acrylamid og en aflejringsinhibitor amino-tris-(methylphosphonat)EXAMPLE 1 10 ppm of a mixture containing a high molecular weight copolymer of 2-acrylamidomethylpropane sulfonic acid and acrylamide and a deposition inhibitor amino-tris- (methylphosphonate)
DK 153367 BDK 153367 B
5 i et vægtforhold på 1:2,5 blev opretholdt i vaskevandet, som anvendtes til recirkulering i et vasketårn for en basisk oxygenovn i 13 uger, i hvilket tidsrum anlægget blev inspiceret visuelt, uden at der blev observeret tegn på synlige aflejringer i pumper, ventiler eller sprøjte-anlæg. Dette står i kontrast til de alvorlige tilstopninger af pumper, sprøjteorganer og ventiler, som medfører formindsket effektivitet af gasvask og afkøling, således at der opstår midlertidige produktionstab, hvis tilsvarende anlæg køres i 2 uger uden behandling. Tidligere blev et sådant anlæg alvorligt forurenet med cal-ciumcarbonat og indeholdt betydelige mængder ferrioxid.5 in a weight ratio of 1: 2.5 was maintained in the wash water used for recycling in a washing tower for a basic oxygen furnace for 13 weeks, during which time the plant was visually inspected without any evidence of visible deposits in pumps, valves or spray systems. This contrasts with the severe blockages of pumps, syringes and valves, which result in diminished efficiency of gas washing and cooling, resulting in temporary production losses if the corresponding plant is run for 2 weeks without treatment. Previously, such a plant was severely contaminated with calcium carbonate and contained considerable amounts of ferric oxide.
EKSEMPEL 2 6,6 ppm af et middel bestående af en højmolekylær copolymer af 2-acrylamidomethylpropansulfonsyre og acrylamid samt en aflejringsinhibitor amino-tris-(methylphospho-nat) i et vægtforhold på 1:2,5, blev opretholdt i vaskevand, som anvendtes til et køle- og venturivaskesy-stem for en basisk oxygenovn, hvor der normalt forekom alvorlige ophobninger af calciumfluorid, jornoxid og calciumcarbonat. Efter 1 600 opvarmningsperioder blev anlægget inspiceret, og gasledninger, fyldmateriale for vasketårne og dyser viste sig at være rene.EXAMPLE 2 6.6 ppm of an agent consisting of a high molecular weight copolymer of 2-acrylamidomethylpropanesulfonic acid and acrylamide as well as a 1: 2.5 weight ratio inhibitor of aminotris (methylphosphonate) was maintained in wash water used for a cooling and venturi washing system for a basic oxygen furnace, where there is usually severe accumulation of calcium fluoride, iron oxide and calcium carbonate. After 1,600 warm-up periods, the plant was inspected and gas lines, washing tower filler material and nozzles proved to be clean.
EKSEMPEL 3 15 ppm af et middel bestående af en højmolekylær copolymer af 2-acrylamidomethylpropansulfonsyre og acrylamid samt en aflejringsinhibitor amino-tris-(methylphospho-nat) i et vægtforhold på 1:2,5 opretholdtes i vaskevand, som tilførtes en højovnsgasvasker med kraftige jernaflejringer, hvori der tidligere var opstået en forøgelse af tryktabet i ovnen, således at der forekom produktionstab og afbrydelser for rensning i løbet af enEXAMPLE 3 15 ppm of an agent consisting of a high molecular weight copolymer of 2-acrylamidomethylpropane sulfonic acid and acrylamide as well as a 1: 2.5 weight ratio inhibitor of amino tris (methylphosphonate) was maintained in wash water which was fed to a blast furnace gas washer , which previously had an increase in pressure loss in the furnace, resulting in production losses and interruptions for cleaning during a
DK 153367BDK 153367B
6 uge, når der anvendtes et lavmolekylært (ca. 1 000) poly-acrylat og amino-tris-(methylenphosphonat). Efter 6 ugers behandling med det omhandlede højmolekylære polymer/aflejringsinhibitor-middel forekom der ikke nogen trykforøgelse eller ophobning, og anlægget fungerede normalt.6 weeks when a low molecular weight (about 1,000) polyacrylate and amino tris (methylene phosphonate) were used. After 6 weeks of treatment with the high molecular weight polymer / deposition inhibitor in question, no pressure increase or accumulation occurred and the plant functioned normally.
EKSEMPEL 4EXAMPLE 4
For at simulere betingelserne i et gasvaskeanlæg fremstilledes syntetisk vaskevand med en pH-værdi på 12,0, en koncentration af suspenderede faste partikler (hydratiseret ferrioxid) på 2 000 mg/liter, en natriumhydroxidkoncentration på 200 mg/liter, en natriumbicarbonatkoncentra-tion på 260 mg/liter, en calciumkoncentration på 450 mg/ liter og en fluoridkoncentration på 40 mg/liter. Vandet blev holdt på en temperatur på 60 + 2 °C, og det cirkuleredes gennem forsøgsanlægget med en lineær hastighed på mellem 0,9 og 1,25 m/s. Forsøgsapparatet indeholdt en uopvarmet prøvesektion (længde 30 cm), en opvarmet sektion (længde 30 cm), en spray-sektion og en afløbssektion. Inhibitoren blev sat til det syntetiske vand, som derefter cirkuleredes gennem anlægget i 5 timer, hvorefter der blev afbrudt, prøvesektionen blev vejet og inhiberings-processen blev beregnet efter følgende formel: % inhibering = 1 - ^ aflejring (inhlberet) χ a vægt af aflejring (kontrol)To simulate the conditions of a gas washing plant, synthetic wash water was prepared at a pH of 12.0, a concentration of suspended solids (hydrated ferric oxide) of 2000 mg / liter, a sodium hydroxide concentration of 200 mg / liter, a sodium bicarbonate concentration of 260 mg / liter, a calcium concentration of 450 mg / liter and a fluoride concentration of 40 mg / liter. The water was maintained at a temperature of 60 + 2 ° C and circulated through the test plant at a linear velocity of between 0.9 and 1.25 m / s. The test apparatus contained an unheated test section (length 30 cm), a heated section (length 30 cm), a spray section and a drain section. The inhibitor was added to the synthetic water, which was then circulated through the plant for 5 hours, then discontinued, the sample section weighed and the inhibition process calculated according to the following formula:% inhibition = 1 - ^ deposition (inhibited) by weight of deposition (control)
Resultaterne af disse prøver fremgår af tabel I.The results of these tests are shown in Table I.
TABEL ITABLE I
DK 153367BDK 153367B
77
Produkt Koncentra- Vægtforøgelse %Product Concentrations- Weight gain%
Test og forhold tion (ppm) i gram (ikke- Inhibering opvarmet, op- _varmet, afløb)_Test and ratio (ppm) in grams (non-Inhibition heated, heated, drained) _
Kontrol - 8,21 8,325 10,425 1 Calgon/ 5,0 3,29 59,9Control - 8.21 8.332 10.425 1 Calgon / 5.0 3.29 59.9
Polymer I 2,91 65,0 1:1 1,31 87,4 2 AMP/ 5,0 0,88 89,3Polymer I 2.91 65.0 1: 1 1.31 87.4 2 AMP / 5.0 0.88 89.3
Polymer 1 0,59 92,9 1:1 1,16 88,9 3 HEDP/ 5,0 1,67 79,7Polymer 1 0.59 92.9 1: 1 1.16 88.9 3 HEDP / 5.0 1.67 79.7
Polymer 1 1,56 81,3 1:1 0,97 90,7 4 Calgon/ 5,0 0,50 93,9Polymer 1 1.56 81.3 1: 1 0.97 90.7 4 Calgon / 5.0 0.50 93.9
Polymer 2 0,68 91,8 1:1 1,20 88,5 5 AMP/ 5,0 0,69 91,6Polymer 2 0.68 91.8 1: 1 1.20 88.5 5 AMP / 5.0 0.69 91.6
Polymer 2 0,60 92,8 1:1 1,23 88,2 6 HEDP/ 5,0 0,80 90,3Polymer 2 0.60 92.8 1: 1 1.23 88.2 6 HEDP / 5.0 0.80 90.3
Polymer 2 0,55 93,4 1:1 1,41 86,5 7 Calgon/ 10,0 0,42 94,9Polymer 2 0.55 93.4 1: 1 1.41 86.5 7 Calgon / 10.0 0.42 94.9
Polymer 3 0,45 94,6 1:5 1,42 86,4 8 AMP/ 5,0 8,35 - 1,71Polymer 3 0.45 94.6 1: 5 1.42 86.4 8 AMP / 5.0 8.35 - 1.71
Polymer 3 , 6,25 24,91 5:1 11,54 - 10,7 9 HEDP/ 0,1 0,52 93,7Polymer 3, 6.25 24.91 5: 1 11.54 - 10.7 9 HEDP / 0.1 0.52 93.7
Polymer 3 0,46 94,5 1:1 1,80 82,7 10 Calgon/ 10,0 3,50 57,4Polymer 3 0.46 94.5 1: 1 1.80 82.7 10 Calgon / 10.0 3.50 57.4
Polymer 4 3,31 60,2 1:5 4,23 59,4 11 AMP/ 5,0 5,98 27,2Polymer 4 3.31 60.2 1: 5.24 59.4 11 AMP / 5.0 5.98 27.2
Polymer 4 5,38 35,4 5:1 6,38 38,8 Værdierne viser vægtforøgelse større end kontrolværdien e TABEL 1 (fortsat)Polymer 4 5.38 35.4 5: 1 6.38 38.8 Values show weight gain greater than control value e TABLE 1 (continued)
DK 153367BDK 153367B
88
Test Produkt Koncentra- Vægtforøgelse % og forhold tion (ppm) i gram (ikke- Inhibering opvarmet, op- ___varmet, afløb)_ 12 HEDP/ 0,1 2,21 73,1Test Product Concentration- Weight gain% and ratio (ppm) in grams (non-Inhibition heated, heated, drained) _ 12 HEDP / 0.1 2.21 73.1
Polymer 4 1,80 78,4 1:1 1,53 85,3 13 Calgon/ 0,1 0,34 95,9Polymer 4 1.80 78.4 1: 1 1.53 85.3 13 Calgon / 0.1 0.34 95.9
Polymer 5 0,33 96,0 1:1 0,60 94,2 14 AMP/ 10,0 1,49 81,9Polymer 5 0.33 96.0 1: 1 0.60 94.2 14 AMP / 10.0 1.49 81.9
Polymer 5 1,40 83,2 1:5 ** ** 15 HEDP/ 5,0 2,68 67,4Polymer 5 1.40 83.2 1: 5 ** ** 15 HEDP / 5.0 2.68 67.4
Polymer 5 2,16 74,1 5:1 1,99 80,9 16 Calgon/. 0,1 0,62 92,4Polymer 5 2.16 74.1 5: 1 1.99 80.9 16 Calgon /. 0.1 0.62 92.4
Polymer 6 0,61 92,7 1:1 1,65 84,2 17 AMP/ 10,0 2,22 73,0Polymer 6 0.61 92.7 1: 1 1.65 84.2 17 AMP / 10.0 2.22 73.0
Polymer 6 2,07 75,1 1:5 2,86 72,6 18 HEDP/ 5,0 4,31 47,5Polymer 6 2.07 75.1 1: 5 2.86 72.6 18 HEDP / 5.0 4.31 47.5
Polymer 6 3,80 54,4 5:1 2,70 74,1 19 Calgon/ 5,0 0,43 94,8Polymer 6 3.80 54.4 5: 1 2.70 74.1 19 Calgon / 5.0 0.43 94.8
Polymer 7 0,51 93,9 5:1 1,02 90,2 20 AMP/ 0,1 0,67 91,8Polymer 7 0.51 93.9 5: 1 1.02 90.2 AMP / 0.1 0.67 91.8
Polymer 7 0,57 93,2 1:1 0,44 95,8 21 HEDP 10,0 0,66 92,0Polymer 7 0.57 93.2 1: 1 0.44 95.8 21 HEDP 10.0 0.66 92.0
Polymer 7 0,86 89,7 1:5 1,14 89,1 22 Calgon/ 5,0 0,57 93,1Polymer 7 0.86 89.7 1: 5 1.14 89.1 22 Calgon / 5.0 0.57 93.1
Polymer 8 0,58 93,0 5:1 0,72 84,7 Vægt af afløbssektion blev ikke bestemt, fordi flokku-lering resulterede i større mekanisk indeslutning end aflejring.Polymer 8 0.58 93.0 5: 1 0.72 84.7 Weight of drain section was not determined because flocculation resulted in greater mechanical containment than deposition.
TABEL 1 (fortsat)TABLE 1 (continued)
DK 153367BDK 153367B
99
Test Produkt Koncentra- Vægtforøgelse % og forhold tion (ppm) i gram (ikke- Inhibering opvarmet, op- ____varmet, afløb)_ 23 AMP/ 0,1 0,72 91,2Test Product Concentration- Weight gain% and ratio (ppm) in grams (non-Inhibition heated, heated, drained) _ 23 AMP / 0.1 0.72 91.2
Polymer 8 0,51 93,9 1:1 1,27 87,8 24 HEDP/ 10,0 1,84 77,6Polymer 8 0.51 93.9 1: 1 1.27 87.8 24 HEDP / 10.0 1.84 77.6
Polymer 8 1,70 79,6 1:5 1,64 84,3Polymer 8 1.70 79.6 1: 5 1.64 84.3
Produkt-forklaringProduct explanation
Calgon natriumhexametaphosphat AMP amino-tris-(methylenphosphonsyre) HEDP l-hydroxyethylidne-l,l-diphosphonsyreCalgon sodium hexametaphosphate AMP amino-tris- (methylene phosphonic acid) HEDP 1-hydroxyethylidene-1,1-diphosphonic acid
Polymer 1 49/51 copolymer af acrylamid og 2-acryl- amido-2-methylpropan-l-sulfonsyre med en molekylvægt på ca. 1 000 000Polymer 1 49/51 copolymer of acrylamide and 2-acrylamido-2-methylpropane-1-sulfonic acid having a molecular weight of approx. 1 000 000
Polymer 2 homopolymer af 2-acrylamido-2-methylpro- pan-l-sulfonsyre med en molekylvægt på ca. 5 00 000Polymer 2 homopolymer of 2-acrylamido-2-methylpropan-1-sulfonic acid having a molecular weight of approx. 5 00 000
Polymer 3 højmolekylært ikke-hydrolyseret poly- acrylamid med en molekylvægt på ca.Polymer 3 high molecular weight non-hydrolyzed polyacrylamide having a molecular weight of approx.
1 000 0001 000 000
Polymer 4 lavmolekylært natriumacrylat med en mole kylvægt på 700 - 1 000Polymer 4 low molecular weight sodium acrylate with a mole cooling weight of 700-1000
Polymer 5 højmolekylært hydrolyseret (15¾) poly- acrylamid med en molekylvægt på ca.Polymer 5 high molecular weight hydrolyzed (15¾) polyacrylamide having a molecular weight of approx.
1 000 0001 000 000
Polymer 6 lavmolekylært hydrolyseret (50¾) poly- aerylamid med en molekylvægt på ca. 8 000Polymer 6 low molecular weight hydrolyzed (50¾) poly-aerylamide having a molecular weight of approx. 8 000
Polymer 7 sulfoneret polystyren med en molekylvægt på ca. 700 000Polymer 7 sulfonated polystyrene having a molecular weight of approx. 700 000
Polymer 8 sulfoneret polystyren med en molekylvægt på 6 000 - 8 000Polymer 8 sulfonated polystyrene having a molecular weight of 6,000 - 8,000
Claims (2)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64725376A | 1976-01-07 | 1976-01-07 | |
| US64725376 | 1976-01-07 | ||
| US73372376A | 1976-10-26 | 1976-10-26 | |
| US73372376 | 1976-10-26 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK566776A DK566776A (en) | 1977-07-08 |
| DK153367B true DK153367B (en) | 1988-07-11 |
| DK153367C DK153367C (en) | 1989-01-02 |
Family
ID=27095118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK566776A DK153367C (en) | 1976-01-07 | 1976-12-16 | PROCEDURE AND MEASURES TO AVOID DEPOSITS IN GAS WASHERS |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS52110288A (en) |
| BR (1) | BR7608838A (en) |
| CA (1) | CA1087480A (en) |
| CH (1) | CH624368A5 (en) |
| DE (1) | DE2700347A1 (en) |
| DK (1) | DK153367C (en) |
| FI (1) | FI763638A (en) |
| FR (1) | FR2337694A1 (en) |
| GB (1) | GB1532391A (en) |
| IE (1) | IE44558B1 (en) |
| IT (1) | IT1121700B (en) |
| LU (1) | LU76525A1 (en) |
| NL (1) | NL185221C (en) |
| NO (1) | NO144619C (en) |
| SE (1) | SE435456B (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2019826B (en) * | 1978-04-28 | 1982-06-23 | Martin Marietta Corp | Process of removing oxides of sulphur from gases sludge resulting from process and product comprising lime or limestone |
| CA1114978A (en) * | 1978-06-15 | 1981-12-22 | Chih M. Hwa | Sludge conditioning composition for scale inhibition in water |
| JPS55109432A (en) * | 1979-02-19 | 1980-08-22 | Kurita Water Ind Ltd | Deodorizing method |
| US4342733A (en) * | 1981-01-09 | 1982-08-03 | Betz Laboratories, Inc. | Method of improving sulfite antioxidant performance in high solids scrubbers |
| DE3230291A1 (en) * | 1981-08-18 | 1983-03-03 | Dearborn Chemicals Ltd., Widnes, Cheshire | COMPOSITION FOR PREVENTING KETTLE IN AQUEOUS SYSTEMS |
| DE3249178T1 (en) * | 1982-01-29 | 1984-09-06 | Dearborn Chemical Co., Lake Zurich, Ill. | Process for suppressing corrosion of iron-based metals |
| CA1207211A (en) * | 1982-09-27 | 1986-07-08 | Dionisio G. Cuisia | Composition and method for inhibiting scale |
| US4469663A (en) * | 1982-10-15 | 1984-09-04 | The Dow Chemical Company | Scale control in flue gas desulfurization |
| EP0122013B1 (en) * | 1983-03-07 | 1988-12-21 | Calgon Corporation | Polymeric additives for water |
| DE3317126C2 (en) * | 1983-05-06 | 1986-07-24 | Mannesmann AG, 4000 Düsseldorf | Process to avoid acid corrosion on continuous casting plants |
| US4671934A (en) * | 1986-04-18 | 1987-06-09 | Buckman Laboratories, Inc. | Aminophosphonic acid/phosphate mixtures for controlling corrosion of metal and inhibiting calcium phosphate precipitation |
| US4872996A (en) * | 1987-03-13 | 1989-10-10 | The Dow Chemical Company | Use of aminophosphonic acids to inhibit scale formation and corrosion caused by manganese in water systems |
| EP0311072A3 (en) * | 1987-10-08 | 1989-06-07 | The B.F. Goodrich Company | Stabilization of metal ions and dispersion of particulates in aqueous systems |
| CN108136367A (en) * | 2015-08-28 | 2018-06-08 | 塞里奥尼克斯股份有限公司 | For the pneumatic filter of alkaline pollutant |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3806367A (en) * | 1972-06-01 | 1974-04-23 | Bitz Lab Inc | Acrylamido-sulfonic acid polymers and their use as rust and tubercle removing agents |
| US3880620A (en) * | 1974-06-19 | 1975-04-29 | Betz Laboratories | Method for scrubbing gases derived from blast furnaces |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1110365A (en) * | 1965-03-29 | 1968-04-18 | Calgon Corp | Inhibition of scale in saline water evaporators |
| FR1544503A (en) * | 1966-11-16 | 1968-10-31 | Benckiser Gmbh Joh A | Descaler products |
| US3630937A (en) * | 1968-05-06 | 1971-12-28 | Calgon Corp | Sulfonated polystyrene compositions and methods of treating boiler water |
| GB1361857A (en) * | 1970-08-28 | 1974-07-30 | Chemed Corp | Scale-inhibiting composition and method |
| US3663448A (en) * | 1970-09-25 | 1972-05-16 | Calgon Corp | Inhibiting scale deposition |
| US3709816A (en) * | 1971-07-01 | 1973-01-09 | Calgon Corp | Control of alluvial and other deposits in aqueous systems |
| FR2198106A1 (en) * | 1972-09-04 | 1974-03-29 | Rhone Progil | Corrosion and scale prevention in cooling systems - using phosphates, zinc salts and acrylic polymers |
| DE2248586A1 (en) * | 1972-10-04 | 1974-04-18 | Drew Chem Corp | METHOD OF SEPARATION OF ACID GASES FROM MIXTURES OF FLUIDS CONTAINING SUCH GASES |
| US3890228A (en) * | 1973-04-13 | 1975-06-17 | Chemed Corp | Polyacrylate-polyphosphonic acid treatment in aqueous systems |
| US3918935A (en) * | 1973-08-13 | 1975-11-11 | Factory Mutual Res Corp | Non-newtonian liquid and method for wet scrubbing stack gases |
-
1976
- 1976-12-15 SE SE7614102A patent/SE435456B/en not_active IP Right Cessation
- 1976-12-16 DK DK566776A patent/DK153367C/en not_active IP Right Cessation
- 1976-12-17 FI FI763638A patent/FI763638A/fi not_active Application Discontinuation
- 1976-12-21 NL NLAANVRAGE7614213,A patent/NL185221C/en not_active IP Right Cessation
- 1976-12-23 NO NO764352A patent/NO144619C/en unknown
- 1976-12-30 BR BR7608838A patent/BR7608838A/en unknown
- 1976-12-31 IE IE2858/76A patent/IE44558B1/en not_active IP Right Cessation
- 1976-12-31 IT IT52856/76A patent/IT1121700B/en active
-
1977
- 1977-01-04 GB GB46/77A patent/GB1532391A/en not_active Expired
- 1977-01-04 CA CA269,079A patent/CA1087480A/en not_active Expired
- 1977-01-05 FR FR7700135A patent/FR2337694A1/en active Granted
- 1977-01-05 LU LU76525A patent/LU76525A1/xx unknown
- 1977-01-05 DE DE19772700347 patent/DE2700347A1/en active Granted
- 1977-01-06 CH CH15477A patent/CH624368A5/en not_active IP Right Cessation
- 1977-01-07 JP JP43977A patent/JPS52110288A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3806367A (en) * | 1972-06-01 | 1974-04-23 | Bitz Lab Inc | Acrylamido-sulfonic acid polymers and their use as rust and tubercle removing agents |
| US3880620A (en) * | 1974-06-19 | 1975-04-29 | Betz Laboratories | Method for scrubbing gases derived from blast furnaces |
Also Published As
| Publication number | Publication date |
|---|---|
| DK153367C (en) | 1989-01-02 |
| GB1532391A (en) | 1978-11-15 |
| IT1121700B (en) | 1986-04-10 |
| LU76525A1 (en) | 1977-07-15 |
| FI763638A (en) | 1977-07-08 |
| FR2337694A1 (en) | 1977-08-05 |
| NL185221C (en) | 1990-02-16 |
| BR7608838A (en) | 1977-10-25 |
| IE44558L (en) | 1977-07-07 |
| NO764352L (en) | 1977-07-08 |
| CA1087480A (en) | 1980-10-14 |
| IE44558B1 (en) | 1982-01-13 |
| NL7614213A (en) | 1977-07-11 |
| CH624368A5 (en) | 1981-07-31 |
| DK566776A (en) | 1977-07-08 |
| DE2700347A1 (en) | 1977-07-14 |
| NO144619B (en) | 1981-06-29 |
| DE2700347C2 (en) | 1989-12-28 |
| JPS52110288A (en) | 1977-09-16 |
| NO144619C (en) | 1981-10-07 |
| FR2337694B1 (en) | 1981-12-24 |
| SE435456B (en) | 1984-10-01 |
| NL185221B (en) | 1989-09-18 |
| SE7614102L (en) | 1977-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4118318A (en) | Gas scrubber scale and deposit control | |
| DK153367B (en) | PROCEDURE AND MEASURES FOR THE EFFECT OF DISPOSALS IN GAS WASHERS | |
| US5683587A (en) | Process for treating industrial wastes | |
| US5961837A (en) | Process for treatment of industrial waste | |
| US3766077A (en) | Compositions and method for inhibiting scaling in aqueous systems | |
| ATE222342T1 (en) | METHOD AND DEVICE FOR WASTE TREATMENT | |
| KR100848286B1 (en) | Scale Preventer and Scale Preventing Method for Wastewater Disposal Facility in Flue Gas Desulfurization System Using Sodium Hypochlorite | |
| CA1182983A (en) | Gas scrubbing methods | |
| AU2014334760A1 (en) | Gypsum scale inhibitors for ore slurry systems in hydro metallurgical applications | |
| US3880620A (en) | Method for scrubbing gases derived from blast furnaces | |
| JP2012220064A (en) | Low temperature corrosion prevention method for waste heat boiler of waste treatment facility, and the waste heat boiler | |
| EP0056180B1 (en) | Method and composition for inhibiting the amount of oxidation of sulfite in a sulfite containing aqueous gas scrubber medium | |
| CN113248028B (en) | Quenching tower salt ash softening agent in rotary kiln incineration process and application method | |
| AU649149B2 (en) | Inhibition of scale formation and corrosion by sulfonated organophosphonates | |
| JPS5811279B2 (en) | Scale prevention treatment method | |
| US4326962A (en) | Sulfur-containing lignins as magnesium sulfite tri-hydrate dispersants | |
| CN107824022B (en) | Treatment method and treatment system for waste water and waste gas in power industry | |
| GB2137185A (en) | Composition and Method for Inhibiting Scale | |
| US4814406A (en) | Scale inhibitor | |
| BE850110A (en) | FIGHT AGAINST SCALE AND DEPOSITS IN GAS WASHERS. | |
| JP2008126113A (en) | Exhaust gas treating method | |
| JPS6233000B2 (en) | ||
| JP2636947B2 (en) | Corrosion prevention method in combustion exhaust gas treatment equipment of melting furnace | |
| JPS5853958B2 (en) | Shuujin Suino Shiyorihouhou | |
| JPH07194938A (en) | Flue gas desulfurization method for heavy oil boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |