CN109111081A - A kind of dehydration of sludge high-drying and dehydration filtrate pretreating process and its processing system - Google Patents
A kind of dehydration of sludge high-drying and dehydration filtrate pretreating process and its processing system Download PDFInfo
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- CN109111081A CN109111081A CN201811037531.2A CN201811037531A CN109111081A CN 109111081 A CN109111081 A CN 109111081A CN 201811037531 A CN201811037531 A CN 201811037531A CN 109111081 A CN109111081 A CN 109111081A
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- sludge
- dehydration
- filtrate
- drying
- acid
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of dehydration of sludge high-drying and dehydration filtrate pretreating process, are related to technical field of sludge treatment.The present invention includes the following steps: S01, by sludge conditioning system enhancement excess sludge dewatering；Sludge after S02, conditioning obtains mud cake and dehydration filtrate by sludge high-drying dewatering system；S03, dehydration filtrate make the metal ion in filtrate form wadding body through filtrate alkali tune flocculation system；S04, wadding body is removed by filtrate filtration system, cleaner liquid is obtained；S05, cleaner liquid is crossed by acid-base neutralization system adjusting pH to neutrality, be emitted into water treatment system.The present invention improves dewatering performance of sludge by addition inorganic coagulant and organic flocculant, in conjunction with dehydration equipments such as plate compressions, it can be achieved that sludge high-drying is dehydrated.
Description
Technical field
The invention belongs to technical field of sludge treatment, pre-process more particularly to a kind of dehydration of sludge high-drying and dehydration filtrate
Technique and a kind of dehydration of sludge high-drying and dehydration filtrate pretreatment system.
Background technique
Sewage treatment can generate a large amount of excess sludges, and excess sludge shale is complicated, contain a large amount of hydroaropic substances, sludge dewatering
It needs to improve sludge before, chemical method conditioning is the most common means, cooperates organic flocculant frequently with inorganic coagulant
Mode.
The addition of inorganic coagulant will increase the concentration of metal ions such as dehydration filtrate hardness and iron, aluminium, and filtrate needs list
Reason of staying alone is back to Raw water treatment system mixed processing with qualified discharge.With the continuous operation of dehydration equipment, if not right
Metal ion is removed, and metal ion can be constantly enriched in water treatment system, final to influence system throughput and effluent quality.
Especially to the sewage treatment process using the film process unit such as ultrafiltration, MBR, since film makees the interception of bulky grain metal ion
With, lead to metal ion fast enriching in systems, it is dirty to block up film unit.
Summary of the invention
It is inorganic by adding the purpose of the present invention is to provide a kind of dehydration of sludge high-drying and dehydration filtrate pretreating process
Coagulant and organic flocculant improve dewatering performance of sludge, in conjunction with dehydration equipments such as plate compressions, it can be achieved that sludge high-drying is dehydrated.
In order to solve the above technical problems, the present invention is achieved by the following technical solutions:
The present invention is a kind of dehydration of sludge high-drying and dehydration filtrate pretreating process, is included the following steps:
S01, pass through sludge conditioning system enhancement excess sludge dewatering；
Sludge after S02, conditioning obtains mud cake and dehydration filtrate by sludge high-drying dewatering system；
S03, dehydration filtrate make the metal ion in filtrate form wadding body through filtrate alkali tune flocculation system；
S04, wadding body is removed by filtrate filtration system, cleaner liquid is obtained；
S05, cleaner liquid is crossed by acid-base neutralization system adjusting pH to neutrality, be emitted into water treatment system.
Further, the improvement dewatering performance of sludge in the S01 is specially that inorganic coagulation is added in sludge conditioning pond
Agent and organic flocculant.
Further, the inorganic coagulant dosage is the 20%-80% of over dry sludge quality；The inorganic coagulant
For at least one of ferric trichloride, bodied ferric sulfate, ferric sulfate of polymerized silica, aluminium polychloride, bisgallic acid iron.
Further, the organic flocculant dilution ratio is 0.1%-0.4%, is added after dilution to sludge conditioning pond
Amount is the 100%-150% of over dry sludge quality in conditioner.
Further, it is specifically included in the S03 and first adjusts dehydration filtrate pH to 8-13 using basic agent, then added
Organic flocculant obtains alkaline filtrate；The organic flocculant ratio is 0.1%-0.4% and adds to filtrate alkali tune to flocculate
The amount of system is the 1%-2% of filtrate volume；
Wherein, the basic agent includes sodium hydroxide, sodium carbonate, sodium bicarbonate, potassium hydroxide.
Further, the organic flocculant is polyacrylamide, in polyetheramine, polydimethyl diallyl ammonium chloride
It is at least one.
Further, addition acid medicine is specifically included in the S05 and adjusts pH to 6-9, is flowed back into water treatment system；
The acid medicine includes concentrated hydrochloric acid or the concentrated sulfuric acid.
The present invention also provides a kind of dehydration of sludge high-drying and dehydration filtrate pretreatment systems, including sludge conditioning system, dirt
Mud high level cadre dewatering system, alkali tune flocculation system, filtration system, acid-base neutralization system and water treatment system；
The sludge conditioning system front end is connected with water treatment system, for extracting excess sludge, rear end and sludge high-drying
Dewatering system is connected, for providing conditioned sludge；
Sludge high-drying dewatering system rear end is connected with alkali tune flocculation system；By sludge in conditioner is conveyed into dredge pump
To by the dehydration equipment in sludge high-drying dewatering system, mud-water separation, mud cake outward transport disposition are realized, filtrate is transported to alkali tune flocculation
Filtrate reaction unit in system；
The rear end of the alkali tune flocculation system is connected with filtration system；The rear end of the filtration system and acid-base neutralization system
It is connected；The rear end of the acid-base neutralization system is connected with water treatment system.
Further, the sludge conditioning system includes a sludge conditioning pond, and the sludge conditioning pond is equipped with inorganic coagulation
Agent and organic flocculant dosing mouth, for adding conditioning medicament；Sludge conditioning pond hiccup also sets agitating device, will improve medicine
Agent is uniformly mixed with sludge.
Further, the alkali tune flocculation system includes filtrate reaction unit, and stirring is equipped in the filtrate reaction unit
Device is precipitated the precipitation by metallic ion such as iron in filtrate, aluminium, calcium by adding basic agent in filtrate reaction unit, and leads to
Crossing addition organic flocculant makes sediment flocculation at bulky grain floc sedimentation.
Further, the filtration system includes filter plant, and the filter plant is above-mentioned by metal ion for retaining
The bulky grain floc sedimentation to flocculate is precipitated, metal ion in filtrate is removed, cleaner liquid is obtained.
Further, the sludge high-drying dewatering system includes dehydration equipment and auxiliary device composition, the dehydration equipment
For one of plate and frame type filter-press, membrane filter press, vacuum drying formula filter press.
The invention has the following advantages:
1, the present invention improves dewatering performance of sludge by addition inorganic coagulant and organic flocculant, in conjunction with plate compression etc.
Dehydration equipment is, it can be achieved that sludge high-drying is dehydrated；
2, for the present invention by pre-processing to dehydration filtrate, concentration of metal ions in removal filtrate reduces filtrate hardness,
The load with film unit water treatment system is advantageously reduced, membrane flux is improved.
3, present invention process is reasonable, by dehydration equipment and adjust dehydration filtrate pH filtrate is pre-processed, investment and
Operating cost is low and easily controllable.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is sludge high-drying dehydration and dehydration filtrate pretreating process flow chart of the invention；
Fig. 2 is sludge high-drying dehydration and dehydration filtrate pretreatment system block diagram of the invention.
Specific embodiment
To keep purpose, process program and the advantage of embodiment of the present invention clearer, below with reference to the embodiment of the present invention
The technical solution in embodiment of the present invention is clearly and completely described with attached drawing, it is clear that described embodiment is this
Invent a part of embodiment, rather than whole embodiments.
Fig. 2, a kind of dehydration of shown sludge high-drying and dehydration filtrate pretreatment system, including sludge conditioning system, sludge are high
Dry dewatering system, alkali tune flocculation system, filtration system, acid-base neutralization system and water treatment system；
Sludge conditioning system front end is connected with water treatment system, and for extracting excess sludge, rear end and sludge high-drying are dehydrated
System is connected, for providing conditioned sludge；
Sludge high-drying dewatering system rear end is connected with alkali tune flocculation system；It is logical by being delivered to sludge in conditioner into dredge pump
The dehydration equipment in sludge high-drying dewatering system is crossed, realizes mud-water separation, mud cake outward transport disposition, filtrate is transported to alkali tune flocculation system
In filtrate reaction unit；
The rear end of alkali tune flocculation system is connected with filtration system；The rear end of filtration system is connected with acid-base neutralization system；Acid
The rear end of alkali neutralization system is connected with water treatment system.
Preferably, sludge conditioning system includes a sludge conditioning pond, and sludge conditioning pond is equipped with inorganic coagulant and organic wadding
Solidifying agent dosing mouth, for adding conditioning medicament；The hiccup of sludge conditioning pond also sets agitating device, and conditioning medicament is mixed with sludge
It is even.
Preferably, alkali tune flocculation system includes filtrate reaction unit, agitating device is equipped in filtrate reaction unit, in filtrate
The precipitation by metallic ion such as iron in filtrate, aluminium, calcium are precipitated by adding basic agent in reaction unit, and by adding organic wadding
Solidifying agent makes sediment flocculation at bulky grain floc sedimentation.
Preferably, filtration system includes filter plant, and filter plant above-mentioned is flocculated for retaining by precipitation by metallic ion
At bulky grain floc sedimentation, remove filtrate in metal ion, cleaner liquid is obtained.
Preferably, sludge high-drying dewatering system includes that dehydration equipment and auxiliary device form,.
Preferably, dehydration equipment and filter plant are a diaphragm type plate and frame filter press, plate and frame filter press model
XMZGS300/1500-UF, filter press maximum are frequency control into dredge pump into mud pressure 1.2MPa, maximum squeeze pressure 2.0MPa
Screw pump.
Shown in Fig. 1, a kind of sludge high-drying is dehydrated and dehydration filtrate pretreating process, includes the following steps:
Excess sludge is delivered to sludge conditioning pond by Pulp pump in S1, water treatment system, improves pool volume 50m3, sludge
Moisture content 97%, first adds 0.62m after mixing evenly3Bisgallic acid iron stirs 20min, then adds 1.5m3Diluted concentration is 0.2%
Cationic polyacrylamide stirs 5min.
S2, filter-press dehydration is carried out by the way that sludge in conditioner is delivered to diaphragm type plate and frame filter press into mud screw pump；Pressure
Filter low pressure is into mud pressure 0.6Mpa, and into mud time 60min, high pressure is into mud pressure 1.2MPa, into mud time 90min, squeezing pressure
Power 2.0Mpa squeezes time 90min；Pressing filtering liquid is delivered to filtrate reactor tank by submersible sewage pump through reservoir.
S3, filtrate hardness described in S2 is measured as 1958mg/L, total concentration of iron is 13.67ppm.Filtrate reacts tank volume
50m3 adds the liquid alkaline that 240L concentration is 30% into reactor tank and adjusts pH to 12, is stirring evenly and then adding into 600L diluted concentration
It is stirred evenly for 0.2% polyacrylamide.
S4, above-mentioned pressing filtering liquid is filtered by being delivered to plate and frame filter press into mud screw pump, twice pressing after filtering, squeezing pressure
Power 2.0Mpa squeezes time 30min；Moisture content of the cake 58% after filters pressing, secondary filtrate are conveyed through clean solution tank by submersible sewage pump
To water treatment system, adds concentrated hydrochloric acid online on pipeline and adjust back pH value to 7-8.
S5, measure secondary filtrate hardness described in S4 be 13mg/L, removal rate 99.3%；Total concentration of iron is 0.02ppm, is gone
Except rate is 88.85%.
Wherein, bisgallic acid iron density is 1.45g/ml.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that skilled artisan be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (9)
1. a kind of sludge high-drying dehydration and dehydration filtrate pretreating process, which comprises the steps of:
S01, pass through sludge conditioning system enhancement excess sludge dewatering；
Sludge after S02, conditioning obtains mud cake and dehydration filtrate by sludge high-drying dewatering system；
S03, dehydration filtrate make the metal ion in filtrate form wadding body through filtrate alkali tune flocculation system；
S04, wadding body is removed by filtrate filtration system, cleaner liquid is obtained；
S05, cleaner liquid is crossed by acid-base neutralization system adjusting pH to neutrality, be emitted into water treatment system.
2. a kind of sludge high-drying dehydration according to claim 1 and dehydration filtrate pretreating process, which is characterized in that described
Improvement dewatering performance of sludge in S01 is specially that inorganic coagulant and organic flocculant are added in sludge conditioning pond.
3. a kind of sludge high-drying dehydration according to claim 2 and dehydration filtrate pretreating process, which is characterized in that described
Inorganic coagulant dosage is the 20%-80% of over dry sludge quality；The inorganic coagulant is ferric trichloride, polyaluminum sulfate
At least one of iron, ferric sulfate of polymerized silica, aluminium polychloride, bisgallic acid iron.
4. a kind of sludge high-drying dehydration according to claim 2 and dehydration filtrate pretreating process, which is characterized in that described
Organic flocculant dilution ratio is 0.1%-0.4%, and the amount added after dilution to sludge conditioning pond is over dry sludge in conditioner
The 100%-150% of quality.
5. a kind of sludge high-drying dehydration according to claim 1 and dehydration filtrate pretreating process, which is characterized in that described
It is specifically included in S03 and first adjusts dehydration filtrate pH to 8-13 using basic agent, then added organic flocculant and obtain alkaline filter
Liquid；The organic flocculant ratio is 0.1%-0.4% and the amount that adds to filtrate alkali tune flocculation system is filtrate volume
1%-2%；
Wherein, the basic agent includes sodium hydroxide, sodium carbonate, sodium bicarbonate, potassium hydroxide.
6. a kind of sludge high-drying dehydration according to claim 4 or 5 and dehydration filtrate pretreating process, which is characterized in that
The organic flocculant is at least one of polyacrylamide, polyetheramine, polydimethyl diallyl ammonium chloride.
7. a kind of sludge high-drying dehydration according to claim 1 and dehydration filtrate pretreating process, which is characterized in that described
Addition acid medicine is specifically included in S05 and adjusts pH to 6-9, is flowed back into water treatment system；The acid medicine includes dense salt
Acid or the concentrated sulfuric acid.
8. a kind of sludge high-drying dehydration and dehydration filtrate pretreatment system, which is characterized in that high including sludge conditioning system, sludge
Dry dewatering system, alkali tune flocculation system, filtration system, acid-base neutralization system and water treatment system；
The sludge conditioning system front end is connected with water treatment system, and for extracting excess sludge, rear end and sludge high-drying are dehydrated
System is connected, for providing conditioned sludge；
Sludge high-drying dewatering system rear end is connected with alkali tune flocculation system；It is logical by being delivered to sludge in conditioner into dredge pump
The dehydration equipment in sludge high-drying dewatering system is crossed, realizes mud-water separation, mud cake outward transport disposition, filtrate is transported to alkali tune flocculation system
In filtrate reaction unit；
The rear end of the alkali tune flocculation system is connected with filtration system；The rear end of the filtration system and acid-base neutralization system phase
Even；The rear end of the acid-base neutralization system is connected with water treatment system.
9. a kind of sludge high-drying dehydration according to claim 8 and dehydration filtrate pretreatment system, which is characterized in that described
Sludge high-drying dewatering system includes dehydration equipment and auxiliary device composition, and the dehydration equipment is plate and frame type filter-press, diaphragm type
One of filter press, vacuum drying formula filter press.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811037531.2A CN109111081B (en) | 2018-09-06 | 2018-09-06 | Sludge high-dry dehydration and dehydration filtrate pretreatment process and treatment system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811037531.2A CN109111081B (en) | 2018-09-06 | 2018-09-06 | Sludge high-dry dehydration and dehydration filtrate pretreatment process and treatment system thereof |
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| CN109111081A true CN109111081A (en) | 2019-01-01 |
| CN109111081B CN109111081B (en) | 2021-12-14 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1535321A (en) * | 2001-06-29 | 2004-10-06 | ���п�ķ�����Ϲɷݹ�˾ | Method for removal of metal from aqueous solution using lime precipitation |
| CN104310747A (en) * | 2014-10-30 | 2015-01-28 | 湖南大学 | Waste drilling mud treatment process |
| CN104445734A (en) * | 2014-11-25 | 2015-03-25 | 中国矿业大学(北京) | Method and device for removing residual aluminum in mine water |
| JP2016221458A (en) * | 2015-05-29 | 2016-12-28 | 株式会社ピーシーエス | Fertilization volume reduction system of agricultural-forestry resources |
| CN108358431A (en) * | 2018-04-28 | 2018-08-03 | 上海同臣环保有限公司 | A kind of Sludge Chemical Conditioning deep dehydration method |
-
2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1535321A (en) * | 2001-06-29 | 2004-10-06 | ���п�ķ�����Ϲɷݹ�˾ | Method for removal of metal from aqueous solution using lime precipitation |
| CN104310747A (en) * | 2014-10-30 | 2015-01-28 | 湖南大学 | Waste drilling mud treatment process |
| CN104445734A (en) * | 2014-11-25 | 2015-03-25 | 中国矿业大学(北京) | Method and device for removing residual aluminum in mine water |
| JP2016221458A (en) * | 2015-05-29 | 2016-12-28 | 株式会社ピーシーエス | Fertilization volume reduction system of agricultural-forestry resources |
| CN108358431A (en) * | 2018-04-28 | 2018-08-03 | 上海同臣环保有限公司 | A kind of Sludge Chemical Conditioning deep dehydration method |
Non-Patent Citations (1)
| Title |
|---|
| 郭宇杰等主编: "《工业废水处理工程》", 31 October 2016, 华东理工大学出版社 * |
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Address after: No. 3966, Qimen Road, Baohe District, Hefei, Anhui Province, 230009 Patentee after: ANHUI TONGYUAN ENVIRONMENT ENERGY SAVING Co.,Ltd. Address before: 230022 no.856, Jinzhai South Road, Baohe District, Hefei City, Anhui Province Patentee before: ANHUI TONGYUAN ENVIRONMENT ENERGY SAVING Co.,Ltd. |