CN107352778A - A kind of sludge drainage bactericide - Google Patents

A kind of sludge drainage bactericide Download PDF

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Publication number
CN107352778A
CN107352778A CN201710606814.3A CN201710606814A CN107352778A CN 107352778 A CN107352778 A CN 107352778A CN 201710606814 A CN201710606814 A CN 201710606814A CN 107352778 A CN107352778 A CN 107352778A
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sludge
bactericide
sludge drainage
calcium
polyaluminium
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李明昌
梅阳
李威
车立威
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Zibo Clear Water Purifying Material Co Ltd
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Zibo Clear Water Purifying Material Co Ltd
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Priority to CN201710606814.3A priority Critical patent/CN107352778A/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/06—Treatment of sludge; Devices therefor by oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Treatment Of Sludge (AREA)

Abstract

A kind of sludge drainage bactericide, belongs to water-treatment technology field.It is characterized in that：Active ingredient is polyaluminium calcium iron, and the molecular formula of polyaluminium calcium iron is：[Ca2(OH)nCl4‑n]m·[Fe2(OH)x·Cl6‑x]y.It is good that the sludge drainage bactericide of the present invention breaks glue demulsification, turbidity removal effect and flocculating setting effect, better than in general PAC, PFS, and COD to sludge and higher containing water removal rate, moisture content maximum is down to 40%, COD clearances are more than 70%, and chroma removal rate is more than 70%.Compared to the method for directly adding lime and ferric sulfate on the market, polyaluminium calcium mild steel link chain is longer, and the bigger more consolidation of flco of formation, dosage is small, and sludge yield is small.It is wide to be applicable water temperature range, pH value range.

Description

A kind of sludge drainage bactericide
Technical field
A kind of sludge drainage bactericide, belongs to water-treatment technology field.
Background technology
Steel plant of spent acid system of steel plant in process of production, because steel surface is using hydrochloric acid continuous acid-washing derusting, produce A large amount of pickle liquors containing frerrous chloride and low-concentration hcl.The corrosion inhibiter not waited containing concentration also in other acid solution, category In the explicitly provided danger wastes category of country.The enterprise for producing such spent acid be mainly steel rolling mill, steel cable factory, zinc-plated factory, Electroplate Factory etc. need to carry out the enterprise of pickling to steel.
Big and small iron and steel enterprise of China is ten hundreds of at present, the pickling unit of 450,000 tons of cold-rolled steel sheets of an annual output, often Year needs to use 20,000 tons of hydrochloric acid, caused spent acid（Concentration is 5% hydrochloric acid, 18% ~ 23% frerrous chloride）Nearly 20,000 tons/year.It is national annual Caused such spent acid is more than 100,000,000 tons.If these spent acid directly discharge, caused by the environmental pollution order of severity well imagine.
For environmental protection resource, do the reasonable utilization of spent acid well, it is domestic generally to take following several ways to carry out at present Processing：1st, neutralisation：Neutralized using large quantities of lime and acid pickle, then directly discharged it.The method is in processing procedure In, produce substantial amounts of iron hydroxide and waste water, it is difficult to qualified discharge, secondary pollution is brought to environment；Disappear simultaneously in processing procedure Substantial amounts of lime and human resources are consumed, are not suitable for handling on a large scale.2nd, acid reclaiming process：Namely high-temperature roasting method, utilize height Temperature steams hydrogen chloride in spent acid, then combines to form hydrochloric acid with water and recycle.This method using high-temperature roasting method equipment due to being thrown Money is big, at least needs 10,000,000 yuan could run to 15,000,000 yuan and calorific value cost height, process one ton of regenerated acid expense 200 ~ 300 yuan, also need enterprise voluntarily separately to deal with caused sludge, cause small business is powerless to undertake, do not stint to reduce cost Waste discharge acid steathily.Therefore, spent acid, useless mud are entrusted to professional treatment enterprise by many enterprises, on behalf of processing, processing cost per ton is 200 ~ 1500 yuan, enterprise needs to spend millions of or even up to ten million processing costs every year.And the environmental pollution caused by the dark row of the row of stealing Event, country are even more to need to take out the fund of over ten billion and several years even time of decades to complete soil remediation, eliminate dirt The work of dye.The reasonable disposal and utilization of spent acid, turn into environment difficulties of the pendulum in face of the country and people.
On the other hand, accelerate along with China's expanding economy, the increase of population, urbanization process, the public is to ring The requirement of border quality increasingly improves.The water resource increasingly increased in China is in short supply, water pollution situation also getting worse, according to statistics National discharge of wastewater in 2003 is 46,000,000,000 t.The sewage treatment plant that China is completed and put into effect at present is existing more than 600, day Sewage treatment capacity is more than 40,000,000 t.Greatly alleviate China's water pollution situation.But municipal sewage plant is net in processing Substantial amounts of sludge is produced during change water body（Solid-state castoff）.The handling process commonly used by current sewage treatment plant, is often handled One ton of sewage will be about the municipal sludge of generation 0.5% ~ 1%（Aqueous 80%）.One day handled the treatment plant of 300,000 t sewage, daily About produce 150t ~ 300t sludge（Aqueous 80%）.Gone into operation 43 sewage treatment plants of operation of Zhejiang Province produce sludge daily at present In 2000t ~ 3000t or so（Aqueous 80%）.Beijing City day quantity of wastewater effluent is up to ten thousand t more than 200, if sewage is all subject to Processing, t sludge more than 2000 will be produced daily（Aqueous 80%）.Whole year accumulative more than 80 ten thousand t.
Current Domestic sludge dewatering mainly adds the method for mechanism filter-pressing to carry out using chemical method.Added in thickened sludge Aluminium salt or molysite, sludge is pressed into by mud cake by plate and frame or crawler blotter press, then outward transport landfill or burning.But The moisture content of the cake that is disposed is generally all 80% or so, and moisture is high, causes sludge volume huge, and bacterial virus grows in mud It is raw, fill latter meet and rain and become mire, secondary pollution is brought to environment；Burning process is also because moisture too high consumption is excessive Coal, processing cost increase.Therefore moisture percentage in sewage sludge, how reasonably disposing sludge how are reduced, accomplishes minimizing, harmless Change, stabilisation, recycling, the processing target of industrialization has become the sewage treatment plant of national big and medium-sized cities and relevant departments compel Be essential the environmental resource problem to be solved, and some areas turn into the task of top priority.
The content of the invention
The technical problem to be solved in the present invention is：Overcome the deficiencies in the prior art, there is provided a kind of broken glue demulsification, turbidity removal effect And the sludge drainage bactericide that flocculating setting effect is good.
The technical solution adopted for the present invention to solve the technical problems is：Active ingredient is polyaluminium calcium iron, polymerize chlorine Change calcium iron molecular formula be：[Ca2(OH)nCl4-n]m·[Fe2(OH)x·Cl6-x]y, wherein n is 1 ~ 3 arbitrary integer, and x is 1 ~ 5 Arbitrary integer, m be 3 ~ 15 arbitrary integer, y be 10 ~ 15 arbitrary integer.
For divalence iron content in acid pickle is high, character is stable, mild acidity physics and chemistry advantage, in the presence of oxidant Ferrous ion carries out oxidation and rises covalent reaction, and calcium ion forms a stable macromolecular polymeric chain by ferric chain Bar, product is obtained after cooling.Polyaluminium calcium iron is that calcium salt and molysite polymerize dehydrating agent by one kind obtained by copolyreaction, simultaneous Have the characteristics of general calcium salt, molysite, can overcome short with pure calcium salt molecular weight, the shortcomings that clarifying ability difference, and can is overcome with pure The shortcomings of water outlet of iron salt coagulant is unclear, colourity is high.Medicament is inorganic polymer in itself, and calcium, iron ion are all without to environment Secondary pollution is caused, it is green.
By the watery hydrochloric acid, frerrous chloride and calcium hydroxide in mass ratio 77 ~ 82 of concentration 5%:18~23:1 ~ 8, reaction is made, Reaction time is 60 min ~ 120min, and reaction temperature is 30 DEG C ~ 60 DEG C.
Preferably, the mass ratio of the watery hydrochloric acid of described concentration 5%, frerrous chloride and calcium hydroxide is 79:21:4~6.
Preferably, spent acid and calcium hydroxide in mass ratio 100 as caused by steel surface using hydrochloric acid continuous acid-washing derusting: 1 ~ 8 reaction is made, and the reaction time is 60 min ~ 120min, and reaction temperature is 30 DEG C ~ 60 DEG C.The present invention is with spent acid and hydroxide Calcium is raw material, develops such a high-effective sludge dehydration sterilization filter aid ----polyaluminium calcium iron.Polymerization is occurring instead simultaneously At once, the corrosion inhibiter having in acid pickle chops into micromolecular compound off in oxidation stage by calcium hydroxide, by the larger change of toxicity For less toxic or nontoxic material.Preferably, the mass ratio of described spent acid and calcium hydroxide is 100:3~6.
In above two preparation form, it is preferred that the described reaction time is the min of 90 min ~ 100, and reaction temperature is 47℃~53℃.The length of the macromolecular chain of polymerization dehydrating agent prepared by preferable reaction condition, the distribution of calcium iron are more reasonable, Broken glue demulsification, turbidity removal effect are more preferable.
The mass percent composition of the spent acid includes 5% hydrochloric acid, 18% ~ 23% frerrous chloride and water.
Sludge drainage bactericide is 1.25 ~ 1.35 in 20 DEG C of relative density, the pH value of water solution of 1% mass concentration for 2 ~ 3.5。
Mass percent in sludge drainage bactericide shared by Ca is 1.5% ~ 9%, the mass percent shared by full iron for 8% ~ 10%。
Preparation method is：Watery hydrochloric acid, frerrous chloride and the calcium hydroxide in mass ratio 77 ~ 82 of concentration 5%:18~23:1 ~ 8 is anti- It should be made, the reaction time is 60 min ~ 120min, and reaction temperature is 30 DEG C ~ 60 DEG C.Preparation is simple.
Preferably, the described reaction time is the min of 90 min ~ 100, and reaction temperature is 47 DEG C ~ 53 DEG C.Preferable technique Product quality prepared by condition is more preferable.
During sludge dewatering treatment, the existence form of moisture has following several in sludge：
（1）Surface adsorption water：It is due to moisture of the effect absorption on mud granule surface of surface tension.It is easiest to depart from Moisture；
（2）Interstitial Water：It is the free moisture that mud granule surrounds, typically constitutes from sludge moisture content 65% --- 85%, this part water is The main object of sludge condensation, and the main place that medicament plays a role；
（3）Capillary combination water：Between mud granule or particulate fractures in due to capillarity and particle it is straight between be incorporated in one The moisture risen, accounts for sludge total moisture content about 15%~25%.Inspissation can not separate capillary combination water, separate capillary combination water Higher mechanicals efforts and energy are needed, as vacuum filter, centrifugation and extruding can remove this partial moisture.Introduce and close Suitable broken glue demulsifier can suitably reduce mechanical external force；
（4）Internal junction Heshui：The moisture in microbial cell body in sludge is included in, how much thin with microorganism in sludge content is Cell space proportion is relevant.Cell membrane must be destroyed by removing this partial moisture, ooze out cell liquid, be changed into outer from internal junction Heshui Portion's liquid, internal junction Heshui typically only account for total moisture content about 10% or so in sludge.This part water is the moisture for being most difficult to remove, Have only and these microorganisms are killed when medicament plays a role, cell membrane broken wall is removed these moisture.
The mechanism of action of the polyaluminium calcium iron in sludge is that medicament produces hydrolysis, calcium ion water when being contacted with sludge Solution generation calcium hydroxide, because calcium hydroxide floccule surface carries positive charge, so calcium hydroxide can pass through the band of itself Electrically, the mud granule with negative electrical charge is attached together, so as to promote other coagulant to play a role, formed a kind of compound Coacervated system；And because the calcium carbonate that the heavy carbonate in calcium ion and sludge is formed is bulky grain structure, add dirt The porosity of mud, it is easier to the disengaging of moisture；And calcium hydroxide, as a kind of advanced filler, roadbed can be done by being press-filtered out the mud cake come Use.And the multinuclear thing colloid that polymeric ferric salt is dissolved in the water generated as high molecular polymer, mixed except waste water can be carried out Solidifying processing is outer, equally the sludge to precipitate can be made to have adsorptivity.And network structure can be formed in slime layer, carry out tiny dirt Mud net is caught, and makes alumen ustum more closely knit, water content is lower.Medicine carries oxidisability in itself again, it is sufficient to kills such as big in sludge The bacterium of enterobacteria class and virus, ICW flows out after cell death, further reduces moisture percentage in sewage sludge.
Compared with prior art, beneficial effect possessed by a kind of sludge drainage bactericide of the invention is：
1st, it is good that glue demulsification, turbidity removal effect and flocculating setting effect are broken, better than in general PAC, PFS, and COD to sludge and is contained Water removal rate is higher, and moisture content maximum is down to 40%, COD clearances more than 70%, and chroma removal rate is more than 70%；
2nd, compared to the method for directly adding lime and ferric sulfate on the market, polyaluminium calcium mild steel link chain is longer, and the flco of formation is more Big more consolidation, dosage is small, and sludge yield is small；
3rd, it is wide that water temperature range, pH value range are applicable（4 ~ 60 DEG C of water temperature, pH value 5 ~ 8）；
4th, fluid product, it is easy to operate, it is especially suitable for automation dosing；
5th, it is limpid to go out supernatant colourity, COD clearances are high；Phosphide in water body forms calcium phosphate precipitation with calcium ion, more Easily remove.
Embodiment
With reference to specific embodiment, the present invention will be further described, and wherein embodiment 1 is most preferred embodiment.
Embodiment 1
Using spent acid and calcium hydroxide in mass ratio 100 caused by hydrochloric acid continuous acid-washing derusting：4 reactions are made, the quality of spent acid Percentage composition includes 5% hydrochloric acid, 21% frerrous chloride and water, and the reaction time is 95 min, and reaction temperature is 50 DEG C；Detection The active ingredient of product is polyaluminium calcium iron；
Gained sludge drainage bactericide is 1.28 in 20 DEG C of relative density, and the pH value of water solution of 1% mass concentration is 2.3, Ca institutes The mass percent accounted for is 2.19%, and the mass percent shared by full iron is 8.88%.It is using mass spectrograph detection assay molecular formula： [Ca2(OH)2Cl2]6·[Fe2(OH)3·Cl3]10。
Embodiment 2
Using spent acid and calcium hydroxide in mass ratio 100 caused by hydrochloric acid continuous acid-washing derusting：6 reactions are made, the quality of spent acid Percentage composition includes 5% hydrochloric acid, 21% frerrous chloride and water, and the reaction time is 90 min, and reaction temperature is 53 DEG C；Detection The active ingredient of product is polyaluminium calcium iron；
Gained sludge drainage bactericide is 1.3 in 20 DEG C of relative density, and the pH value of water solution of 1% mass concentration is 2.5, Ca institutes The mass percent accounted for is 3.2%, and the mass percent shared by full iron is 8.7%.It is using mass spectrograph detection assay molecular formula： [Ca2(OH)Cl3]9·[Fe2(OH)2·Cl4]10。
Embodiment 3
Using spent acid and calcium hydroxide in mass ratio 100 caused by hydrochloric acid continuous acid-washing derusting：3 reactions are made, the quality of spent acid Percentage composition includes 5% hydrochloric acid, 18% frerrous chloride and water, reaction time 100min, and reaction temperature is 47 DEG C；Detection The active ingredient of product is polyaluminium calcium iron；
Gained sludge drainage bactericide is 1.25 in 20 DEG C of relative density, and the pH value of water solution of 1% mass concentration is shared by 2, Ca Mass percent be 1.85%, mass percent shared by full iron is 9.00%.It is using mass spectrograph detection assay molecular formula： [Ca2(OH)3Cl]7·[Fe2(OH)1·Cl5]14。
Embodiment 4
Using spent acid and calcium hydroxide in mass ratio 100 caused by hydrochloric acid continuous acid-washing derusting：8 reactions are made, the quality of spent acid Percentage composition includes 5% hydrochloric acid, 21% frerrous chloride and water, and the reaction time is 60 min, and reaction temperature is 60 DEG C；Detection The active ingredient of product is polyaluminium calcium iron；
Gained sludge drainage bactericide is 1.35 in 20 DEG C of relative density, and the pH value of water solution of 1% mass concentration is 3.5, Ca institutes The mass percent accounted for is 5.24%, and the mass percent shared by full iron is 8.55%.It is using mass spectrograph detection assay molecular formula： [Ca2(OH)2Cl2]15·[Fe2(OH)5·Cl]10。
Embodiment 5
Using spent acid and calcium hydroxide in mass ratio 100 caused by hydrochloric acid continuous acid-washing derusting：1 reaction is made, the quality of spent acid Percentage composition includes 5% hydrochloric acid, 23% frerrous chloride and water, reaction time 120min, and reaction temperature is 30 DEG C；Detection The active ingredient of product is polyaluminium calcium iron；
Gained sludge drainage bactericide is 1.29 in 20 DEG C of relative density, and the pH value of water solution of 1% mass concentration is 2.2, Ca institutes The mass percent accounted for is 1.64%, and the mass percent shared by full iron is 10%.It is using mass spectrograph detection assay molecular formula： [Ca2(OH)Cl3]6·[Fe2(OH)4·Cl2]15。
Embodiment 6
Directly by the hydrochloric acid of concentration 5%, industrial chlorinations are ferrous and calcium hydroxide reaction is made, the hydrochloric acid of concentration 5%, frerrous chloride and hydrogen-oxygen The mass ratio for changing calcium is 79：21：4, the reaction time is 95 min, and reaction temperature is 50 DEG C；The active ingredient for detecting product is poly- Close calcium chloride iron；
Gained sludge drainage bactericide is 1.28 in 20 DEG C of relative density, and the pH value of water solution of 1% mass concentration is 2.3, Ca institutes The mass percent accounted for is 2.19%, and the mass percent shared by full iron is 8.88%.It is using mass spectrograph detection assay molecular formula： [Ca2(OH)2Cl2]6·[Fe2(OH)3·Cl3]10。
Embodiment 7
Directly by the hydrochloric acid of concentration 5%, industrial chlorinations are ferrous and calcium hydroxide reaction is made, the hydrochloric acid of concentration 5%, frerrous chloride and hydrogen-oxygen The mass ratio for changing calcium is 79：21：6, the reaction time is 90 min, and reaction temperature is 53 DEG C；The active ingredient for detecting product is poly- Close calcium chloride iron；
Gained sludge drainage bactericide is 1.3 in 20 DEG C of relative density, and the pH value of water solution of 1% mass concentration is 2.5, Ca institutes The mass percent accounted for is 3.2%, and the mass percent shared by full iron is 8.7%.It is using mass spectrograph detection assay molecular formula： [Ca2(OH)Cl3]9·[Fe2(OH)2·Cl4]10。
Embodiment 8
Directly by the hydrochloric acid of concentration 5%, industrial chlorinations are ferrous and calcium hydroxide reaction is made, the hydrochloric acid of concentration 5%, frerrous chloride and hydrogen-oxygen The mass ratio for changing calcium is 82：18：3 reactions are made, reaction time 100min, and reaction temperature is 47 DEG C；Detect the effective of product Composition is polyaluminium calcium iron；
Gained sludge drainage bactericide is 1.25 in 20 DEG C of relative density, and the pH value of water solution of 1% mass concentration is shared by 2, Ca Mass percent be 1.85%, mass percent shared by full iron is 9.00%.It is using mass spectrograph detection assay molecular formula： [Ca2(OH)3Cl]7·[Fe2(OH)1·Cl5]14。
Embodiment 9
Directly by the hydrochloric acid of concentration 5%, industrial chlorinations are ferrous and calcium hydroxide reaction is made, the hydrochloric acid of concentration 5%, frerrous chloride and hydrogen-oxygen The mass ratio for changing calcium is 79：21：8 reactions are made, and the reaction time is 60 min, and reaction temperature is 60 DEG C；Detect the effective of product Composition is polyaluminium calcium iron；
Gained sludge drainage bactericide is 1.35 in 20 DEG C of relative density, and the pH value of water solution of 1% mass concentration is 3.5, Ca institutes The mass percent accounted for is 5.24%, and the mass percent shared by full iron is 8.55%.It is using mass spectrograph detection assay molecular formula： [Ca2(OH)2Cl2]15·[Fe2(OH)5·Cl]10。
Embodiment 10
Directly by the hydrochloric acid of concentration 5%, industrial chlorinations are ferrous and calcium hydroxide reaction is made, the hydrochloric acid of concentration 5%, frerrous chloride and hydrogen-oxygen The mass ratio for changing calcium is 77：23：1 reaction is made, reaction time 120min, and reaction temperature is 30 DEG C；Detect the effective of product Composition is polyaluminium calcium iron；
Gained sludge drainage bactericide is 1.29 in 20 DEG C of relative density, and the pH value of water solution of 1% mass concentration is 2.2, Ca institutes The mass percent accounted for is 1.64%, and the mass percent shared by full iron is 10%.It is using mass spectrograph detection assay molecular formula： [Ca2(OH)Cl3]6·[Fe2(OH)4·Cl2]15。
The application method of sludge drainage bactericide of the present invention：This product is liquid, and fluid product can be added directly, chemical feeding quantity For 1 ~ 20 kg/tonne of sludge；Concrete condition determines according to stirring test and industrial experimentation.It is mainly used in oil field sludge, city Political affairs sludge, food processing sludge, the dewater treatment of chemical engineering sludge.Such as the social sewage treatment plants of 80,000 cubes/day counts Calculate, daily caused about 750 ~ 900 cubes of sludge quantity, moisture content is about 80% after processing；Calculated according to chemical feeding quantity 20kg/ tons mud, Need to consume 15 ~ 18 tons of medicament daily, moisture percentage in sewage sludge is down to 60%, and the outer freight volume of whole day sludge reduces 150 ~ 180 cubes.It is annual Outer 55000 ~ 65000 cubes of the freight volume of sludge is reduced, consumes 5500 ~ 6500 tons of pharmaceutical quantities, similarly waste hydrochloric acid amount is 5500 ~ 6500 Ton.Simultaneously in terms of sludge incineration, reduce the consumption of fire coal, improve the combustion heat value of sludge.
According to national 200 yuan/ton of calculating of spent acid disposal costs, product is translated into, can be that country saves dangerous waste every year Disposal costs more than 84%.
Contrast experiment
Take Shengli Oil Field Inner Mongol Hangjin Banner project building site drilling sludge mud 100ml（10 DEG C of water temperature, pH value 6）, add embodiment 1 Polyaluminium calcium iron, chemical feeding quantity 2ml, numbering A1；Reaction time is 5min, flocculation.Sample A1 realizes muddy water in 30s Separation, the solid stabilization of walk, supernatant water quality is limpid, and COD is down to 176mg/L by 1582mg/L in water, and phosphide is by 7.8mg/L It is down to 0.32mg/L；
Sample is done with the favorable to the people sewage treatment plant's municipal sludge mud in Zichuan District of Zibo City, A is the addition gained polyaluminium of embodiment 1 The mud sample of calcium iron, calculated according to dehydrated sludge moisture content of the cake 60%, A Sample Reagents addition is 1.2ml/100ml, A samples Dosage is small, and sludge quantity is relatively low.
Orthogonal experiments further are carried out in 4 DEG C ~ 60 DEG C and 5 ~ 8 respectively to water temperature and pH value, COD to sludge and aqueous are gone Except rate is higher.
Equally, Shengli Oil Field Inner Mongol Hangjin Banner project building site drilling sludge mud 100ml is taken（4 ~ 60 DEG C of water temperature, pH value 5 ~ 8）, add PAC, chemical feeding quantity 2ml, numbering B；Reaction time is 5min, is flocculated with the equivalent flocculant of embodiment 1；Sample B Have no that mud is layered in 10min, break glue demulsification unobvious, COD and phosphide have no and be decreased obviously in water；
Sample is done with the favorable to the people sewage treatment plant's municipal sludge mud in Zichuan District of Zibo City, B is addition lime and ferric sulfate mud sample；Press Calculated according to dehydrated sludge moisture content of the cake 60%, B is lime 1g/100ml, ferric sulfate 1.5ml/100ml, with the phase of embodiment 1 0.8g/100ml is differed than produced sludge quantity.
The above described is only a preferred embodiment of the present invention, being not the limitation for making other forms to the present invention, appoint What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc. Imitate embodiment.But it is every without departing from technical solution of the present invention content, the technical spirit according to the present invention is to above example institute Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.

Claims (9)

  1. A kind of 1. sludge drainage bactericide, it is characterised in that：Active ingredient is polyaluminium calcium iron, the molecule of polyaluminium calcium iron Formula is：[Ca2(OH)nCl4-n]m·[Fe2(OH)x·Cl6-x]y, wherein n be 1 ~ 3 arbitrary integer, x be 1 ~ 5 arbitrary integer, m For 6 ~ 15 arbitrary integer, y is 10 ~ 15 arbitrary integer.
  2. A kind of 2. sludge drainage bactericide according to claim 1, it is characterised in that：By the watery hydrochloric acid of concentration 5%, chlorination Ferrous and calcium hydroxide in mass ratio 77 ~ 82:18~23:1 ~ 8 reaction is made, and the reaction time is 60 min ~ 120min, reaction temperature Spend for 30 DEG C ~ 60 DEG C.
  3. A kind of 3. sludge drainage bactericide according to claim 2, it is characterised in that：The watery hydrochloric acid of described concentration 5%, The mass ratio of frerrous chloride and calcium hydroxide is 79:21:4~6.
  4. A kind of 4. sludge drainage bactericide according to claim 1, it is characterised in that：It is continuous using hydrochloric acid by steel surface Spent acid caused by acid pickling and rust removing and calcium hydroxide in mass ratio 100:1 ~ 8 reaction is made, and the reaction time is 60 min ~ 120min, Reaction temperature is 30 DEG C ~ 60 DEG C.
  5. A kind of 5. sludge drainage bactericide according to claim 4, it is characterised in that：Described spent acid and calcium hydroxide Mass ratio is 100:3~6.
  6. A kind of 6. sludge drainage bactericide according to claim 2 or 4, it is characterised in that：The described reaction time is 90 The min of min ~ 100, reaction temperature are 47 DEG C ~ 53 DEG C.
  7. A kind of 7. sludge drainage bactericide according to claim 4, it is characterised in that：The mass percent group of the spent acid Into frerrous chloride and water including 5% hydrochloric acid, 18% ~ 23%.
  8. A kind of 8. sludge drainage bactericide according to claim 1, it is characterised in that：Sludge drainage bactericide is at 20 DEG C Relative density is 1.25 ~ 1.35, and the pH value of water solution of 1% mass concentration is 2 ~ 3.5.
  9. A kind of 9. sludge drainage bactericide according to claim 1, it is characterised in that：In sludge drainage bactericide shared by Ca Mass percent be 1.5% ~ 9%, mass percent shared by full iron is 8% ~ 10%.
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CN103288232A (en) * 2013-04-17 2013-09-11 浙江大学 Resourceful treatment apparatus and method for waste liquid of chlorohydric acid pickling of steel
CN103922416A (en) * 2014-04-16 2014-07-16 中南大学 Method for separating and recovering iron from red mud
CN104817118A (en) * 2015-05-18 2015-08-05 陈雷 Simple and quick method for preparing polyferric chloride

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