CN110372175A - A kind of sludge conditioner and sludge drying processing method - Google Patents
A kind of sludge conditioner and sludge drying processing method Download PDFInfo
- Publication number
- CN110372175A CN110372175A CN201910818330.4A CN201910818330A CN110372175A CN 110372175 A CN110372175 A CN 110372175A CN 201910818330 A CN201910818330 A CN 201910818330A CN 110372175 A CN110372175 A CN 110372175A
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- Prior art keywords
- sludge
- component
- mud
- conditioner
- solutions
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Classifications
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
- C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
Abstract
The invention discloses a kind of sludge conditioner and sludge drying processing methods.The sludge conditioner, including component A, component B and component C；The mass ratio of the component A, component B and component C are 1:0.2 ~ 0.5:0.15 ~ 0.2；Wherein, the component A is poly-ferric chloride or aluminium polychloride, and component B is polyacrylamide；Component C is cement.The sludge drying processing method includes the following steps: S1, raw sewage is diluted to the sludge solutions to form uniform quality；S2, sludge solutions sufficiently react 0.5 ~ 1.0 h with sludge conditioner；S3, sludge solutions are precipitated；S4, mud cake mud extraction is formed after sludge is carried out press dewatering.The present invention can reduce the moisture content of the sludge of discharge, and then reduce the volume of sludge, alleviate the pressure of refuse landfill, environmentally friendly.
Description
Technical field
The present invention relates to technical field of sludge treatment, and in particular to a kind of sludge conditioner and sludge drying processing method.
Background technique
With the rapid development of social economy, the sewage quantity of sewage treatment plant's processing is growing day by day, what sewage treatment generated
Sludge quantity is consequently increased.The sludge complicated composition that sewage plant generates contain multiple-microorganism, organic matter and inorganic matter, mainly have
Organic matter, heavy metal, salt and pathogen difficult to degrade etc..The sludge that industrial wastewater generates contains a large amount of heavy metal mostly.
The direct emission if these sludge are unprocessed, will cause high risks to environment.Because without overstabilization
In the sludge of processing, high organic content easily degenerates, breeds a large amount of germ, helminth etc., and easily cause to environment secondary
Pollution.Sludge is by rain drop erosion, and cross flow to surface water body, permeating the ground causes to pollute.The sludge of air storage is also easy to produce stench,
Mosquitos and flies is multiplied, surrounding sanitation is seriously affected.In sludge transportational process, since moisture content is higher, sludge is easily spilt on the way
Form pollution.The high-moisture percentage of sludge reduces transport economic specific property, increases the sludge treatment of sludge traffic expense, refuse landfill
Take.
Existing Treatment of Sludge mode is directly to fill the sludge of sewage treatment plant, but such mode is to garbage loading embeading
Many hazards are brought in field, specifically have: 1. shortening refuse landfill service life.Dewatered sludge, which directly fills, can largely occupy rubbish
The effective storage of landfill yard shortens the service life of landfill yard.Currently, between ever-increasing mud amount and limited landfill capacity
Contradiction is increasingly burst.2. causing difficulty to landfill operation.According to " household refuse landfill sites contamination control standard " (GB16889-
2008) requirement, sludge of sewage treatment plant moisture content < 60% after processing, can enter household refuse landfill sites landfill stabilization.
Landfill yard is usually one layer of rubbish, one layer of earthing, is then rolled, to ensure better space utilization.Dewatered sludge it is aqueous
For rate generally 80% or so, the high-moisture percentage of sludge, high viscosity bring difficulty to landfill operation, landfill process is such as bulldozed, is compacted,
Covering is difficult to carry out.3. causing great pollution to environment.During Sludge landfill, mechanical equipment can not be in Sludge Surface
The work such as it is compacted, covered, therefore sludge substantially air storage, in landfill yard, the stench given out causes dirt to atmosphere
Dye.Due to that can not be compacted to sludge, surface is very loose, in addition fly eradication personnel can not carry out dissipation work on its surface
Make, the good environment that sludge is multiplied at fly, leading to landfill yard, flies multiply enormously.4. Severe blockage leachate collection system
System.The high-moisture percentage of sludge considerably increases landfill percolate treating capacity, since sludge is tiny, is frequently occluded leachate collection
System and drainpipe have aggravated the bearing load of waste dam, bring difficulty to landfill yard safety and management, rainy season more exacerbates
This phenomenon.The expense for clearing up collection system is prohibitively expensive.5. bringing security risk.The rheological characteristic of sludge to fill body mutability
Shape and landslide become artificial " marshland ", and landfill yard brings very big security risk Treatment of Sludge to become the one big of environmental improvement
Problem.
Therefore, how the water content of sludge to be reduced, is the side of those skilled in the art's research to solve the above problems
To.
Summary of the invention
In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a kind of sludge conditioners, by broken
Wall chain rupture solves the cell combination water of more difficult removal in sludge, and the moisture in microorganism allowed in sludge is released, and reduces dirty
The water content of mud.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that it is such:
A kind of sludge conditioner, including component A, component B and component C；The mass ratio of the component A, component B and component C
For 1:0.2~0.5:0.15~0.2；Wherein, the component A is poly-ferric chloride or aluminium polychloride, and component B is polyacrylamide
Amine；Component C is cement.
Wherein, the component A, component B, component C are powdered.
Sludge conditioner provided by the invention is solved the cell combination water of more difficult removal in sludge, is allowed by broken wall chain rupture
The moisture in microorganism in sludge is released.For the inorganic compounding medicament voluntarily researched and developed, by powdered A conditioner, B tune
Reason agent, C conditioner mix in proportion, in addition, are uniformly mixed the form that aqueous solution is made with water in chemicals dosing plant
Addition, can be realized conditioner and sludge is readily sufficiently mixed uniformly.And store respectively in the form of a powder, so that A tune
Reason agent, B conditioner, C conditioner will not react to each other and reduce activity, to obtain good treatment effect.Moreover, because at
Point and proportion it is well-designed so that a small amount of conditioner of addition can reach good conditioning effect.
The present invention also provides a kind of sludge drying processing method, using sludge drying processing system and above-mentioned sludge conditioner,
Moisture percentage in sewage sludge is substantially reduced, the pressure of refuse landfill is alleviated.Include the following steps:
S1, raw sewage is diluted to moisture content is 97% or more, and stirring forms the sludge solutions of uniform quality；
S2, the sludge solutions in S1 are sufficiently reacted into 0.5~1.0h with sludge conditioner；
S3, S2 is reacted after sludge solutions precipitating, realize mud-water separation；
S4, mud cake mud extraction is formed after the sludge after mud-water separation is carried out press dewatering；The press dewatering time be 3~
4h, water content≤60% of the mud cake after press dewatering.
Wherein, in the step S3, the dosage of conditioner is 100~300PPM.
Further, the sludge drying treatment system includes the sludge dilution system being sequentially communicated, standby mud sump, sludge conditioning
System, sedimentation basin, mud storage pool and plate compression system；
It is equipped with sludge inlet in the sludge dilution system, the sludge enters the dirt from sludge inlet by sludge pump
In mud dilution system, after standby mud sump, sludge conditioning system, mud storage pool, pass through fortune again after handling into plate compression system
Defeated vehicle transports.
Further, include the following steps:
S1, raw sewage is pumped into sludge dilution system and be diluted to moisture content be 99%, stirring form uniform quality
Sludge solutions；Sludge solutions flow out into standby mud sump from sludge dilution system and store；
S2, sludge solutions enter in the conditioning device in sludge conditioning system from standby mud sump；Chemicals dosing plant adds conditioner
Enter in the conditioning device, reacts it sufficiently with sludge solutions；Wherein, the dosage of conditioner is 100~300PPM.Sludge
Solution stops 0.5~1.0h in conditioning device；
S3, sludge solutions are put into sedimentation basin and are precipitated, realize mud-water separation；Sludge after separation, which enters in mud storage pool, to be deposited
It puts；
S4, it takes the sludge in mud storage pool to be put into plate compression system to carry out mud extraction after press dewatering, when the press dewatering
Between be 3~4h, water content≤60% of the mud after press dewatering.
Further, the sludge conditioning system includes chemicals dosing plant and conditioning device；The chemicals dosing plant by conditioner with
Water is mixed to form conditioning agent solution, and conditioning agent solution is transported in conditioning device；Dirt after the dilution of sludge dilution system
Mud solution reacts in the conditioning device with conditioning agent solution.
Further, the conditioning device can rotate or be equipped with stirring rod.
Compared with prior art, the present invention has the advantage that
1, sludge conditioner provided by the invention is by sludge broken wall chain rupture, to make the water in the microorganism in sludge
Divide and be released, solve the cell combination water of more difficult removal in sludge, provides basis for the dehydration of subsequent plate compression.
The principle of the conditioner processing sludge are as follows: the cement in conditioner can be as the core of sludge coagulating.With poly-
Iron chloride or aluminium polychloride are closed as flocculant, the macromolecular mass in sludge is decomposed by polyacrylamide as flocculation aid
Subset sufficiently releases the moisture wherein swept along；Broken wall chain rupture is carried out to it, releases cellular water and Interstitial Water.Pass through
The forms such as oxidation, absorption, chelating solidify pollutant, can be improved wadding body diameter, the wadding body being consequently formed is formed compared with conventional method
Wadding body for, specific gravity is larger, settling velocity increase, muddy water initial gross separation can be fast implemented.The flocculation structure of formation is firm,
It is non-breakable when being squeezed through subsequent plate and frame filter press, biggish sludge cake is formed, to reduce tiny sludge, improves sludge
Oxidation-reduction potential, sludge is not smelly, does not return molten.
2, sludge drying processing method provided by the invention, can directly to biochemistry pool or secondary settling tank excess sludge at
Reason, is dehydrated using segmented, can disposably handle sludge to 60% or less from moisture content 99%.In the drying and other treatment of sludge
In the process, due to no heating process, no toxic and harmful gas generates, and odorless, does not return molten, treated sludge knot
Structure is stablized.Also, system automation degree is high, and various pumps, motor are in safeguard protection, and every safety requirements meets country
Standard, the personal safety of staff have sufficient guarantee.
The sludge drying treatment system provided through the invention treated sludge, minimizing is significant, 1 ton of moisture content 80%
Sludge, after being down to 60% or less, weight is at 0.5 ton hereinafter, volume reduction decrement is up to 50% or more.Transportation cost be also down to half with
Under.Since treated, moisture percentage in sewage sludge is low, it is suppressed that the activity of pathogen, sludge structure stablize not smelly, the harm of sludge
It is reduced；Patent conditioner during the reaction, by micro- charge reaction, by absorption, chelating, solidifies function, by sludge
In free heavy metal chelated, solidified, so that Heavy Metals is switched to stable state, reduce the biological effectiveness of heavy metal, subtract
It is small come the ecology influence of heavy metal.
3, sludge drying treatment system provided by the invention, using separated practices, investment is small, and low energy consumption, easy to operate,
System stability is high.For 50,000 ton/days of day output of sewage treatment plants, investment construction cost is 7,000,000 or so.It is annual
About 25.51 ten thousand yuan of the electricity charge (electricity price is in terms of 0.65 yuan/degree), not as good as the 1/3 of other techniques, therefore are suitble to be widely used to promote.
Detailed description of the invention
Fig. 1 is a kind of sludge drying processing method structural schematic diagram of the present invention
Fig. 2 is a kind of sludge drying processing method process flow chart of the present invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
One, sludge conditioner
A kind of sludge conditioner, including component A, component B and component C；The mass ratio of the component A, component B and component C
For 1:0.2~0.5:0.15~0.2；Wherein, the component A is poly-ferric chloride or aluminium polychloride, and component B is polyacrylamide
Amine；Component C is cement.Specific ingredient and proportion are as shown in table 1.
1 component A of table, component B, the specific ingredient of component C and proportion
As can be known from the above table, small compared to the sludge wadding body that is formed in comparative example 1 and 2, settling velocity is low, the limpid degree of supernatant
Generally, the sludge wadding body formed in Examples 1 to 4 is big, settling velocity is fast, the limpid degree of supernatant is good, can be effectively quickly real
Existing mud-water separation, is ready for subsequent frame dehydration.
Two, sludge drying processing method
Referring to Fig. 1, the sludge drying processing method includes the following steps:
S1, raw sewage is pumped into sludge dilution system to and is diluted to 97% or more moisture content, stirring forms uniform quality
Sludge solutions.
S2, sludge solutions flow out into standby mud sump from sludge dilution system and store.
S3, sludge solutions enter in the conditioning device in sludge conditioning system from standby mud sump；Chemicals dosing plant adds conditioner
Enter in the conditioning device, reacts it sufficiently with sludge solutions；Wherein, the dosage of conditioner is 100~300PPM.Sludge
Solution stops 0.5~1.0h in conditioning device.
S4, sludge solutions are put into sedimentation basin and are precipitated, realize mud-water separation.Sludge after separation, which enters in mud storage pool, to be deposited
It puts.
S5, it takes the sludge in mud storage pool to be put into plate compression system to carry out mud extraction after press dewatering, when the press dewatering
Between be 3~4h, water content≤60% of the mud after press dewatering.
Treatment of Sludge is carried out using above-mentioned sludge drying processing method, sludge is handled.
Comparison before and after sludge dewatering in 2 Examples 1 to 4 of table
As known from Table 2, using sludge drying processing method provided by the invention treated sludge, through dilution, conditioning, pressure
After filter, moisture content of the cake is respectively less than 60%, water content minimum 52%.The water content of sludge is greatly reduced, to contract significantly
The small volume of sludge, reduces subsequent transportation cost, also preferably realizes landfill and resource utilization.
Sludge drying processing method and the comparison of other method for sludge treatment in the present invention as shown in table 3, can from table 3
Know, sludge drying processing method provided by the invention, can reach and integral type drying equipment and pyrohydrolysis+anaerobic digestion
The comparable level of technique, even better than other two kinds for the treatment of process, present invention decrement can reach 40%~60% hereinafter, forming
The a quarter of this only other two kinds of technique is even less.And occupied area is small, is suitble to promote the use of.
Sludge drying processing method and other method for sludge treatment in 3 present invention of table compare
Sludge drying processing method provided by the invention, can by sludge from moisture content 99% disposably processing to 60% with
Under.During the drying and other treatment of sludge, decrement is significant, and the sludge of 1 ton of moisture content 80%, after being down to 60% or less, weight exists
0.5 ton hereinafter, transportation cost is also down to less than half.Since treated, moisture percentage in sewage sludge is low, it is suppressed that the activity of pathogen,
Sludge structure stabilization is not smelly, and the harm of sludge is reduced；Patent conditioner during the reaction, by micro- charge reaction,
By absorption, chelating, solidification function, the free heavy metal in sludge is chelated, is solidified, Heavy Metals is made to switch to stablize
State reduces the biological effectiveness of heavy metal, reduces and has carried out the ecology influence of heavy metal.
Finally, it should be noted that technical side the above examples are only used to illustrate the technical scheme of the present invention and are not limiting
Case, those skilled in the art should understand that, modification or equivalent replacement of the technical solution of the present invention are made for those, and
The objective and range for not departing from the technical program, are intended to be within the scope of the claims of the invention.
Claims (8)
1. a kind of sludge conditioner, it is characterised in that: including component A, component B and component C；The component A, component B and component C
Mass ratio be 1:0.2 ~ 0.5:0.15 ~ 0.2；Wherein, the component A is poly-ferric chloride or aluminium polychloride, and component B is poly-
Acrylamide；Component C is cement.
2. sludge conditioner according to claim 1, it is characterised in that: the component A, component B, component C are powder
Shape.
3. a kind of sludge drying processing method, which is characterized in that use sludge drying treatment system, include the following steps:
S1, raw sewage is diluted to moisture content is 97% or more, and stirring forms the sludge solutions of uniform quality；
S2, the sludge solutions in S1 are sufficiently reacted into 0.5 ~ 1.0 h with sludge conditioner；
S3, S2 is reacted after sludge solutions precipitating, realize mud-water separation；
S4, mud cake mud extraction is formed after the sludge after mud-water separation is carried out press dewatering；The press dewatering time is 3 ~ 4 h,
Water content≤60% of mud cake after press dewatering.
4. sludge drying processing method according to claim 3, which is characterized in that in the step S2, the throwing of conditioner
Dosage is 100 ~ 300 PPM.
5. sludge drying processing method according to claim 3, which is characterized in that the sludge drying treatment system includes
Sludge dilution system, standby mud sump, sludge conditioning system, sedimentation basin, mud storage pool and the plate compression system being sequentially communicated；
It is equipped with sludge inlet in the sludge dilution system, the sludge is dilute from sludge inlet into the sludge by sludge pump
In release system, after standby mud sump, sludge conditioning system, mud storage pool, pass through transport vehicle again after handling into plate compression system
It transports.
6. sludge drying processing method according to claim 5, which comprises the steps of:
S1, raw sewage is pumped into sludge dilution system and be diluted to moisture content be 99%, stirring formed uniform quality sludge it is molten
Liquid；Sludge solutions flow out into standby mud sump from sludge dilution system and store；
S2, sludge solutions enter in the conditioning device in sludge conditioning system from standby mud sump；Institute is added in conditioner by chemicals dosing plant
It states in conditioning device, reacts it sufficiently with sludge solutions；Wherein, the dosage of conditioner is 100 ~ 300 PPM；
Sludge solutions stop 0.5 ~ 1.0h in conditioning device；
S3, sludge solutions are put into sedimentation basin and are precipitated, realize mud-water separation；Sludge moisture content after separation is 97 ~ 98%, into
Enter in mud storage pool and stores；
S4, the sludge in mud storage pool is taken to be put into mud extraction after plate compression system progress press dewatering, the press dewatering time is 3
~ 4 h, water content≤60% of the mud after press dewatering.
7. sludge drying processing method according to claim 5, which is characterized in that the sludge conditioning system includes dosing
Device and conditioning device；Conditioner and water are mixed to form conditioning agent solution by the chemicals dosing plant, and will conditioning agent solution conveying
Into conditioning device；Sludge solutions after the dilution of sludge dilution system react in the conditioning device with conditioning agent solution.
8. sludge drying processing method according to claim 5, which is characterized in that the conditioning device can be rotated or be set
There is stirring rod.
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