CN110228935A - A kind of sludge dewatering pretreatment unit and method - Google Patents

A kind of sludge dewatering pretreatment unit and method Download PDF

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Publication number
CN110228935A
CN110228935A CN201910573034.2A CN201910573034A CN110228935A CN 110228935 A CN110228935 A CN 110228935A CN 201910573034 A CN201910573034 A CN 201910573034A CN 110228935 A CN110228935 A CN 110228935A
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Prior art keywords
sludge
hosepipe
medicine mixer
mud medicine
mud
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CN201910573034.2A
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Chinese (zh)
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CN110228935B (en
Inventor
刘阳
胡晓明
陈代新
任巍
王丹
胡柳
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Hunan Beikong Wei Environmental Polytron Technologies Inc
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Hunan Beikong Wei Environmental Polytron Technologies Inc
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/123Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/125Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/127Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (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

The invention discloses a kind of sludge dewatering pretreatment unit and method, which includes Mechanical Crushing pre-processing device, sludge delivery pump, the first mud medicine mixer, the first hosepipe, ultrasound reactor, the second mud medicine mixer, the second hosepipe, mixing plant and concentration filter press;For Mechanical Crushing pre-processing device for the bulk impurity in sludge to be crushed, outlet connects the sludge delivery pump;First mud medicine mixer is separately connected the sludge delivery pump and first hosepipe, for mixing sludge conditioning medicament with sludge;Ultrasound reactor is set in the pipeline outer wall between first hosepipe and the second mud medicine mixer;Second mud medicine mixer is connect with second hosepipe, for mixing flocculant with sludge;The import of mixing plant is connect with second hosepipe, and outlet is connect with the concentration filter press.This method has many advantages, such as that the sludge conditioning time is short, sludge modification is thorough, sludge dewatering is high-efficient.

Description

A kind of sludge dewatering pretreatment unit and method
Technical field
The invention belongs to technical field of sludge treatment more particularly to a kind of sludge dewatering pretreatment unit and methods.
Background technique
National sludge yield is huge, but harmlessness disposing rate is low.Existing sludge treatment route include land use, Landfill, building materials utilization, burning etc..Land use causes path unsmooth due to heavy metals exceeding standard;Landfill is a kind of interim transitionality Technology path, it becomes the most routes of application case at this stage in conjunction with the deep dehydration of front end, but additive amount of medicament is big, Sludge increment is obvious, and there are secondary pollutions;Building materials are utilized since moisture percentage in sewage sludge is higher, and incorporation is few, and front end dehydration adds Entering a large amount of medicaments causes sludge corrosivity strong, and many collaboration cement projects have all been stopped transport at present;Burning is current solution sludge The most thorough method of problem, and the technology of international sludge treatment most mainstream, but China's sludge calorific value is low, moisture content is high, mud Husky content is big, and traditional drying equipment abrasion is big, and operation and maintenance are complicated, cause desiccation at high cost.Sludge treatment determines dirty Mud processing, all front end sludge treating block technologies are all for rear end sludge treatment service, wherein dehydration and desiccation are at sludge The Key Common Technologies of reason, how low energy efficiently realizes sludge dehydrating and drying, is the only way which must be passed for being connected Treatment of Sludge and disposition.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, provide one The kind sludge conditioning time is short, is modified sludge dewatering pretreatment unit and method thorough, that dehydration efficiency is high.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of sludge dewatering pretreatment unit, including the mixing of Mechanical Crushing pre-processing device, sludge delivery pump, the first mud medicine Device, the first hosepipe, ultrasound reactor, the second mud medicine mixer, the second hosepipe, mixing plant and concentration filter press;
For the Mechanical Crushing pre-processing device for the bulk impurity in sludge to be crushed, it is defeated that outlet connects the sludge Send pump;
The first mud medicine mixer is separately connected the sludge delivery pump and first hosepipe, is used for sludge tune Reason medicament is mixed with sludge;
The ultrasound reactor is set to outside the pipeline between first hosepipe and the second mud medicine mixer On wall;
The second mud medicine mixer is connect with second hosepipe, for mixing flocculant with sludge;
The import of the mixing plant is connect with second hosepipe, and outlet is connect with the concentration filter press.
Further, the sludge delivery pump is sludge screw pump, and the mixing plant is Horizontal stirring equipment, described dense Contracting filter press is heavy high pressure belt formula concentration pressure filtration integration machine.
Further, which uses container-type.
It is a kind of that the pretreated method of sludge dewatering is carried out using the sludge dewatering pretreatment unit, including following steps It is rapid:
S1, the bulk impurity in sludge is crushed by Mechanical Crushing pre-processing device, it is then defeated by sludge delivery pump It is sent to the first mud medicine mixer;
S2, sludge conditioning medicament is added in the first mud medicine mixer, mixes it with sludge;
S3, the sludge for being mixed with sludge conditioning medicament enter ultrasound reactor by the first hosepipe, pass through phonochemistry Reaction makes sludge lysis broken wall;
S4, enter the second mud medicine mixer by the sludge of phonochemical reaction, flocculant is added in the second mud medicine mixer;
Sludge after S5, flocculation enters mixing plant by the second hosepipe, by stirring after flow into concentration filter press into Row concentration.
Further, sludge conditioning medicament uses in clad aluminum molysite, hydrogen peroxide, ferrous sulfate, PAC and PFS in S2 A kind of or any combination.
Further, the ferrous sulfate is replaced using the pickling waste waters that metal-working industry generates, and additive amount is over dry The 5%-20% of sludge quality.
Further, the clad aluminum molysite is in polymeric aluminum sulfate iron, polymeric aluminium ferrum silicate and polyaluminum ferric chloride A kind of or any combination, is added, effective content 30-40% using solution form, and additive amount is the 2-8% of over dry sludge quality.
Further, in S3 be arranged ultrasound reactor ultrasonic frequency 20-100kHz, energy density be 0.207~ 0.265W/mL, ultrasonic time are 2~35s.
Further, it is 20-50r/min that mixing plant mixing speed is arranged in S5.
Compared with prior art, the invention has the benefit that
The mixing sludge and chemical drugs of excess sludge or primary sludge and excess sludge that moisture content is 99% by the present invention Agent mixing conditioning is modified, and carries out Aided Modification using ultrasonic wave during conditioning, and two ways synergistic effect accelerates mud medicine mixed Chemical reaction is closed and strengthened, promotes the dissolution release of sludge extracellular polymeric to combine water, breaking-wall cell discharges internal water, and sludge reaches Easy dehydration purpose, then modified sludge is delivered into high pressure belt thickener press filter, carry out mechanical dehydration moisture percentage in sewage sludge 60% is down to hereinafter, meeting national Treatment of Sludge standard at present.This method is short with the sludge conditioning time, sludge modification is thorough, The advantages that sludge dewatering is high-efficient.
Compared with traditional sludge pretreatment mode, tradition is that broken wall again is first concentrated to flocculate again, the land occupation of concentrator energy consumption height Greatly, and into secondary flocculation is needed before dehydration equipment, reagent cost is high;The present invention is to use first broken wall flocculation concentration again, can be saved Secondary concentration cost, and equally can reach sludge pretreatment effect, reduce sewage plant sludge running cost.
Package unit of the present invention uses container-type, and sludge conditioning is modified, concentration, press dewatering are integrated into a packaging In case, replace original processing to the belt machine of moisture content 80%, centrifuge, folded spiral shell machine and processing to moisture content 60-70%'s Frame dehydration machine.With structure is simple, high treating effect, easy to operate, occupied area is small, sludge dewatering is integrated, serialization, from Dynamic the advantages that being turned into industry.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention Some embodiments for those of ordinary skill in the art without creative efforts, can also basis These attached drawings obtain other attached drawings.
Fig. 1 is the sludge dewatering pretreatment unit structural schematic diagram of the embodiment of the present invention.
Wherein, 1, Mechanical Crushing pre-processing device;2, sludge screw pump;3, the first mud medicine mixer;4, the first hosepipe; 5, ultrasound reactor;6, the second mud medicine mixer;7, the second hosepipe;8, Horizontal stirring equipment;9, high pressure belt thickener pressure Filter.
Specific embodiment
To facilitate the understanding of the present invention, the present invention is done below in conjunction with Figure of description and preferred embodiment more complete Face meticulously describes, but protection scope of the present invention is not limited to following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter are generally understood meaning phase with those skilled in the art Together.Technical term used herein is intended merely to the purpose of description specific embodiment, and it is of the invention to be not intended to limitation Protection scope.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city Field is commercially available or can be prepared by existing method.
The sludge dewatering pretreatment unit of a specific embodiment of the invention, as shown in Figure 1, including that Mechanical Crushing pre-processes Equipment 1, sludge delivery pump (for example, by using sludge screw pump 2), the first mud medicine mixer 3, the first hosepipe 4, ultrasonic response Device 5, the second mud medicine mixer 6, the second hosepipe 7, mixing plant (for example, by using Horizontal stirring equipment 8) and concentration filter press (for example, by using high pressure belt thickener press filter 9).The outlet of Mechanical Crushing pre-processing device 1 connects sludge delivery pump;First mud Medicine mixer 3 is separately connected sludge delivery pump and the first hosepipe 4;Ultrasound reactor 5 is set to the first hosepipe 4 and second In pipeline outer wall between mud medicine mixer 6;Second mud medicine mixer 6 connects the second hosepipe 7;The import of mixing plant and the The connection of two hosepipes 7, outlet are connect with concentration filter press.
Device uses container-type, and sludge conditioning is modified, concentration, press dewatering are integrated into a container.
Sludge conditioning of the present invention is modified to use chemical agent/ultrasonic synergistic lysis broken wall, improves dewatering performance of sludge.Tool Body step: bulk impurity is crushed by the Mechanical Crushing pre-processing device 1 of 2 front end of sludge screw pump first, prevents bulk miscellaneous Matter blocks sludge screw pump 2 and pipeline, and sludge conditioning medicine then is added in the rear end of sludge screw pump 2 first mud medicine mixer 3 Agent;Then pass through the first hosepipe (increase the residence time, sufficiently react, be sufficiently mixed and reduce additive amount of medicament) and enters ultrasonic wave Reactor 5 generates phonochemical reaction, accelerates chemical reaction velocity, promotes the thorough lysis broken wall of sludge;Subsequently into the second mud medicine Flocculant is added in mixer 6, and sludge forms flocculence wadding body and enters Horizontal stirring equipment 8 by the second hosepipe 7, finally flows Enter high pressure belt thickener press filter 9.
Sludge conditioning medicament uses one of clad aluminum molysite (liquid), hydrogen peroxide, ferrous sulfate, PAC, PFS or more Kind combination formula.Clad aluminum molysite (liquid) is polymer aluminium silicate molysite (PSAF), aluminium polychloride molysite (PAFC), polymerised sulphur One of sour ferro-aluminum, effective content 30-40% (w/w), additive amount are the 2-8% (w/w) of over dry sludge quantity.Hydrogen peroxide has Content 25-30% is imitated, additive amount is the 5-10% (w/w) of over dry sludge quantity.Ferrous sulfate, effective content 98-99%, drying Type, 5~35%wt of configuration concentration, additive amount are the 10-20% (w/w) of over dry sludge quantity.PAC, effective content 25-30%, Gu Body or liquid, additive amount are the 3-8% (w/w) of over dry sludge quantity.PFS, effective content 11-20%, solid or liquid, additive amount For the 3-8% (w/w) of over dry sludge quantity.
Polymeric aluminum sulfate iron and ultrasonic synergistic effect are best, it is experimentally confirmed that polymeric aluminum sulfate iron additive amount is 3%, surpass Sound wave specific energy is 0.04kwh/kgDS, and PAM emulsion flocculant additive amount 4/1000ths passes through high pressure belt thickener filter-press dehydration Moisture content of the cake is up to 60%.As a comparison, polymeric aluminum sulfate iron cooperates PAM lotion, and ultrasonic synergistic, polymeric aluminum sulfate iron is not added Additive amount 8%, PAM lotion additive amount is 7/1000ths, by high pressure belt thickener cachaza moisture content up to 72%.
The pickling waste waters that the metal-working industries such as steel generate can be used in ferrous sulfate solution, and (pickling waste waters is to remove Oxidation on metal surface object generates useless when carrying out acid wash processing using the acid such as sulfuric acid, nitric acid, hydrochloric acid, hydrofluoric acid and phosphoric acid Water) it replaces.Pickling waste waters itself is added in sludge as a kind of waste water as inorganic coagulant or reducing agent, and organic Flocculant or oxidant collocation, can be good at the dewatering for improving sludge, and such pickle liquor has obtained very good solution And reagent cost can also be saved for sludge conditioning.According to the concentration of pickling waste waters, the general additive amount over dry sludge of pickling waste waters The 5%-20% (w/w) of amount.
Ultrasound reactor 5 is attached to sludge pipe outer wall, ultrasonic frequency 20-100kHz, the sound intensity, specific energy consumption, use Low energy densities ultrasonic wave combines lysis broken wall with chemical agent, can effectively reduce energy consumption needed for lysis, improve energy efficiency and Extend the service life of Vltrasonic device.
Ultrasonic energy improves the mass-transfer efficiency of sludge and chemical agent, penetrates into it and reaches bacterium inside sludge wadding body Cell surface, and dissolve cell, so as to effectively shorten the required reaction time, reduce amount of consumption of drugs and improve lysis effect Rate.
Experiment, which shows to combine the ultrasonic wave of 0.207~0.265W/mL of energy density with Chemical treatment, to be used to remain Remaining sludge lysis, specific energy be 0.02-0.16kwh/kgDS, pH=6.0, ultrasonic time be 2~35s, sludge lysis rate compared with Chemical agent is used alone and improves 15-30%.
Flocculant uses PAM lotion (stoste) or PAM pulvis.PAM lotion solid content 35-45%, configuration concentration 0.3- 0.6%wt, additive amount are the 0.1-0.6% (w/w) of over dry sludge quantity.
It is dense to monitor sludge by on-line monitoring equipment for the mud medicine hybrid system continuous mud medicine mixer multidirectional using multiply Degree adjusts mud medicine mixed proportion in real time.
Horizontal stirring equipment 8, mixing speed 20-50r/min play the uniformly mixed effect of buffering and mud medicine.
High pressure belt thickener press filter 9 can be left by moisture content 99% using heavy high pressure belt concentration pressure filtration integration machine Right sludge is down to 60% hereinafter, filter cloth tensioning is using hydraulic, and squeeze pressure is up to 40kg, equipment serialization operation, land occupation It is small.
The embodiment of the present invention has the effect that
1, treatment effect is obvious, and sludge reduction reaches 97% (by the above method and apparatus sewage sludge by moisture content 99% It is down to 60% or less);
2, sludge pretreatment is combined using chemistry with physics, and sludge lysis broken wall is more thorough;
3, at low cost, equipment operating cost compares same type frame dehydration machine, operating cost low 50%;
4, occupied area is small, compares frame dehydration machine, and land occupation saves 2/3;
5, civil engineering cost is saved, short construction period is completed equipment in factory and assembled, modularized design;
6, the modified successive reaction of sludge conditioning is not required to setting reaction vessel, saves space occupied;
7,24 hours continuous automatic runnings of integral device, it is unattended.
Above-mentioned only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form.Therefore, it is all not Be detached from technical solution of the present invention content, according to the present invention technical spirit it is made to the above embodiment it is any it is simple modification, etc. With variation and modification, all shall fall within the protection scope of the technical scheme of the invention.

Claims (9)

1. a kind of sludge dewatering pretreatment unit, which is characterized in that including Mechanical Crushing pre-processing device, sludge delivery pump, One mud medicine mixer, the first hosepipe, ultrasound reactor, the second mud medicine mixer, the second hosepipe, mixing plant and concentration Filter press;
For the Mechanical Crushing pre-processing device for the bulk impurity in sludge to be crushed, outlet connects the sludge conveying Pump;
The first mud medicine mixer is separately connected the sludge delivery pump and first hosepipe, is used for sludge conditioning medicine Agent is mixed with sludge;
The ultrasound reactor is set in the pipeline outer wall between first hosepipe and the second mud medicine mixer;
The second mud medicine mixer is connect with second hosepipe, for mixing flocculant with sludge;
The import of the mixing plant is connect with second hosepipe, and outlet is connect with the concentration filter press.
2. sludge dewatering pretreatment unit according to claim 1, which is characterized in that the sludge delivery pump is sludge spiral shell Bar pump, the mixing plant are Horizontal stirring equipment, and the concentration filter press is heavy high pressure belt formula concentration pressure filtration integration machine.
3. sludge dewatering pretreatment unit according to claim 1, which is characterized in that the device uses container-type.
4. a kind of carry out the pretreated method of sludge dewatering using sludge dewatering pretreatment unit described in claim 1, special Sign is, includes the steps that following:
S1, the bulk impurity in sludge is crushed by Mechanical Crushing pre-processing device, is then transported to by sludge delivery pump First mud medicine mixer;
S2, sludge conditioning medicament is added in the first mud medicine mixer, mixes it with sludge;
S3, the sludge for being mixed with sludge conditioning medicament enter ultrasound reactor by the first hosepipe, pass through phonochemical reaction Make sludge lysis broken wall;
S4, enter the second mud medicine mixer by the sludge of phonochemical reaction, flocculant is added in the second mud medicine mixer;
Sludge after S5, flocculation enters mixing plant by the second hosepipe, and it is dense that concentration filter press progress is flowed into after stirring Contracting processing.
5. the pretreated method of sludge dewatering according to claim 4, which is characterized in that sludge conditioning medicament uses in S2 One of clad aluminum molysite, hydrogen peroxide, ferrous sulfate, PAC and PFS or any combination.
6. the pretreated method of sludge dewatering according to claim 5, which is characterized in that the ferrous sulfate uses metal The pickling waste waters that processing industry generates replaces, and additive amount is the 5%-20% of over dry sludge quality.
7. the pretreated method of sludge dewatering according to claim 5, which is characterized in that the clad aluminum molysite is polymerization One of aluminium iron sulfate, polymeric aluminium ferrum silicate and polyaluminum ferric chloride or any combination, are added using solution form, are effectively contained 30-40% is measured, additive amount is the 2-8% of over dry sludge quality.
8. the pretreated method of the sludge dewatering according to one of claim 4~7, which is characterized in that ultrasound is arranged in S3 Wave reactor ultrasonic frequency 20-100kHz, energy density are 0.207~0.265W/mL, and ultrasonic time is 2~35s.
9. the pretreated method of sludge dewatering according to claim 4, which is characterized in that mixing plant is arranged in S5 and stirs Speed is 20-50r/min.
CN201910573034.2A 2019-06-28 2019-06-28 Sludge dewatering pretreatment device and method Active CN110228935B (en)

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Cited By (6)

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CN110921799A (en) * 2019-11-01 2020-03-27 象山德曼机械有限公司 Eddy current solid-liquid separation device
CN111675467A (en) * 2020-06-17 2020-09-18 湖州南浔盛兴再生资源有限公司 Pretreatment process for sludge carbonization
CN112340961A (en) * 2020-11-23 2021-02-09 杭州瑞利超声科技有限公司 Automatic sludge dewatering system and using method thereof
CN113402154A (en) * 2021-07-27 2021-09-17 中原环保股份有限公司 Ultrasonic wall breaking pretreatment system and treatment method for sludge
CN113683274A (en) * 2021-08-03 2021-11-23 山东省环境保护科学研究设计院有限公司 System and method for ex-situ treatment of sludge in urban pipe gallery
CN115304233A (en) * 2022-10-11 2022-11-08 湖南北控威保特环境科技股份有限公司 Sludge pretreatment reactor system and method

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110921799A (en) * 2019-11-01 2020-03-27 象山德曼机械有限公司 Eddy current solid-liquid separation device
CN111675467A (en) * 2020-06-17 2020-09-18 湖州南浔盛兴再生资源有限公司 Pretreatment process for sludge carbonization
CN112340961A (en) * 2020-11-23 2021-02-09 杭州瑞利超声科技有限公司 Automatic sludge dewatering system and using method thereof
CN113402154A (en) * 2021-07-27 2021-09-17 中原环保股份有限公司 Ultrasonic wall breaking pretreatment system and treatment method for sludge
CN113683274A (en) * 2021-08-03 2021-11-23 山东省环境保护科学研究设计院有限公司 System and method for ex-situ treatment of sludge in urban pipe gallery
CN115304233A (en) * 2022-10-11 2022-11-08 湖南北控威保特环境科技股份有限公司 Sludge pretreatment reactor system and method

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