CN106186601B - A kind of processing method of sludge - Google Patents
A kind of processing method of sludge Download PDFInfo
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- CN106186601B CN106186601B CN201610595285.7A CN201610595285A CN106186601B CN 106186601 B CN106186601 B CN 106186601B CN 201610595285 A CN201610595285 A CN 201610595285A CN 106186601 B CN106186601 B CN 106186601B
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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
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B3/00—Fertilisers based essentially on di-calcium phosphate
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
Abstract
The invention discloses a kind of processing methods of sludge, belong to environmental technology field.Method includes the following steps: with slurry, neutralization, growing the grain, level-one flocculating setting, filters pressing, phosphorus deep removal, second level flocculating setting and product mix；The processing method of sludge provided by the invention can handle the sludge generated in metal surface waste and hot-working enterprise production process, obtain fertilizer grade phosphate, turns waste into wealth while saving resource, both protects natural ecological environment, while increasing benefit；This method increase pretreatments with slurry, improve chemical reaction rate between sludge and diluted acid main component；Alkali growing the grain process is newly increased, the residence time is longer, improves the products such as phosphate and obtains and improve effect of settling；Level-one flocculating setting, second level flocculating setting add a small amount of flocculant respectively, improve effect of settling and segmentation plus alkali promotes metal hydroxides sedimentation.This method simple process, easy to operate, at low cost, suitable industrialized production.
Description
Technical field
The invention belongs to environmental technology fields, and in particular to a kind of processing method of sludge.
Background technique
Sludge is the product after sewage treatment, is one kind by organic debris, microorganism, inorganic particle, colloid sludge etc.
The extremely complex heterogeneous body of composition.The key property of sludge is that moisture content is high (up to 99% or more), content of organics
It is smelly to be easy corruption for height, and particle is thinner, and specific gravity is smaller, jelly liquid.It is thick between liquid and solid
Object can use pump transport, but it is difficult to be separated by solid-liquid separation by sedimentation.Surface treatment waste (sludge) as its name suggests, is led
Wanting source is the sludge generated in Treatment of Metal Surface and hot-working enterprise production process, and sludge main matter is calcium phosphate and carbon
Sour calcium.
A kind of organic high molecular polymer of the polyacrylamide (PAM) as threadiness, a kind of macromolecule water treatment flocculant
Product, can adsorb the suspended particulate in water, play link bridging action between particles, and fine grained is made to form bigger wadding
Group, and accelerate the speed of precipitating.This process is referred to as to flocculate, because wherein good flocculating effect PAM is as water process
Flocculant and be widely used in sewage treatment.
A kind of acidic sewage with high-density is disclosed for the Chinese patent of the processing such as Patent No. CN1369442A of sludge
Sludge treatment technique, the technique is by the device systems group such as first reactor, second reactor, aeration tank, sedimentation basin, filter press
At.Using sludge reflux, neutralizer technology is added thereto, neutralizer is made to be adsorbed in sludge carrier surface, recycles this load
In body and waste water, more metal ions in waste water is made to form large-sized precipitate metal hydroxides, improves sludge settling effect
The solid content of rate and sludge reduces the sludge dewatering time, reduces wastewater treatment expense, and suitable conglomerate is widely used.The technique
The metal ion for only having handled the pollution environment in waste water, improves dehydration property, treatment effeciency is improved, to reach
The discharge standard of environmental protection, but the beneficiating ingredient in waste water, sludge is not comprehensively utilized, it is generated in production process a large amount of
Waste liquid, waste of resource is unfavorable for industrialization large-scale production.
Summary of the invention
The purpose of the present invention is to overcome the shortcomings of the existing technology, provides a kind of processing method of sludge, this method operation
Simply, processing is convenient, at low cost, is suitable for industrialization large-scale production.
The purpose of the present invention is achieved through the following technical solutions: a kind of processing method of sludge, it the following steps are included:
S1. with slurry: sludge to be added in stock tank, addition water is dispersed with stirring to form slurry, and slurry obtains dirty through sedimentation separation
Body refuse and sedimentation clear liquid, sedimentation clear liquid is back to be recycled with stock tank；
S2. it neutralizes: phosphoric acid,diluted and sludge silt being slowly added to progress neutralization reaction in neutralization chamber and obtain solidliquid mixture, institute
The mass ratio for stating phosphoric acid,diluted and sludge silt is 1:1~3；Wherein, the time of neutralization reaction is to continue after feeding 1~3h at normal temperature
React 0.5~1.5h；
S3. growing the grain: solidliquid mixture obtained by step S2 is sent into growing the grain slot, and calcium oxide is added and is reacted, adjusts pH
Value is 6.0~7.0, obtains calcium monohydrogen phosphate slurry, wherein the time of reaction is that the reaction was continued 0.5 after feeding 1~3h at normal temperature
The weight ratio of~1.5h, the calcium oxide and solidliquid mixture is 1:15~25；
S4. level-one flocculating setting: calcium monohydrogen phosphate slurry obtained by step S3 is sent into level-one subsider, and it is slow that flocculant is added
Slow stirring forms floc sedimentation, settles 1.5~2.5h, obtains calcium monohydrogen phosphate underflow, supernatant liquor is spare；
S5. filters pressing: being pumped into filter press for calcium monohydrogen phosphate underflow obtained by step S4 and calcium monohydrogen phosphate filter cake be made, and filtrate is spare,
The solid on filter cake is collected, fertilizer grade calcium monophosphate product is obtained；
Filtrate obtained by supernatant liquor obtained by step S4 and S5: being sent into phosphorus deep removal slot by S6. phosphorus deep removal at normal temperature,
And calcium oxide is added and carries out 0.3~1.0h of reaction, adjusting pH value is 10.0~11.0, obtains calcium phosphate slurry, the calcium oxide
Dosage be 1:8~14；
S7. second level flocculating setting: calcium phosphate slurry obtained by step S6 is sent into secondary settling tank, and it is slow that flocculant is added
Stirring forms floc sedimentation, settles 1.5~2.5h, obtains calcium phosphate underflow, and obtained solid is calcium phosphate after filters pressing, and filtrate returns with slurry
Slot；
S8. it product mix: calcium phosphate will be sent into dispersing device obtained by fertilizer grade calcium monophosphate product and S7 obtained by step S5
Mixing, as phosphate mixt.
Further, sedimentation separation described in step S1 is separated using horizontal screw machine, and the revolving speed of the horizontal screw machine is 2800
~3200rad/min.
Further, the moisture content of phosphoric acid,diluted described in step S2 is 80~95%.
Further, flocculant described in step S4 is polyacrylamide, and dosage is 0.10~0.15kg/m3。
Further, 0.6~1.0MPa of filter press described in step S5, filter cloth aperture are 320 mesh.
Further, flocculant described in step S7 is polyacrylamide, and dosage is 0.02~0.08kg/m3。
The present invention is by the way of taking intermittent reaction.
In neutralization procedure: raw sludge is because the reasons such as filters pressing, packed and transported become dense, more for neutralization reaction
Sufficiently, first that sludge is with slurry again through horizontal screw machine separation to form loose, the uniform sludge silt conducive to reaction.The clear water isolated
It is recycled without adding fresh water, while by control horizontal screw machine revolving speed to keep slag tap moisture and raw sludge moisture
Unanimously.After sludge slurry passes through horizontal screw machine, slag charge is directly added into one section of neutralization chamber, and sedimentation clear liquid returns to sludge to be made with stock tank circulation
With and no longer need that fresh water is added.
Sludge silt from horizontal screw machine is slowly added to one section of neutralization chamber and raw material diluted acid hybrid reaction；Reaction will generate a small amount of
CO2Gas, since the heat that production quantity seldom generates is negligible, and CO2The evolution of gas be also unlikely to carrying of liquids (or
Carrying amount is few, meets related request).
Reaction principle: refer to that sludge is slowly added to one section of neutralization chamber, sludge is first dissolved in acid under the conditions of mixed uniformly
In.Key reaction formula is as follows:
CaCO3+H+→CO2+H2O
In formula, R-expression metal impurities；
_ n-expression metal ion valence state.
As sludge is continuously added into, slurry pH is gradually risen, and precipitating is precipitated again, and reaction equation is as follows:
In formula, R-expression metal impurities；
N-expression metal ion valence state.
In growing the grain step: one section neutralize after slurry squeeze into growing the grain slot, mix that the reaction was continued to pH=6.0 with calcium oxide
~7.0, calcium monohydrogen phosphate is converted by the phosphorus pentoxide in acid, while keeping crystalline particle coarse by growing the grain and being settled with quickening,
Filtering.
Key reaction formula is as follows:
In formula, R-expression metal impurities；
N-expression metal ion valence state.
In phosphorus deep removal step: the clear liquid obtained through sedimentation and filters pressing, need to be into one because phosphorus content is higher (P=76mg/L)
Step, which neutralizes dephosphorization, can be only achieved emission request；Therefore, be slowly added to calcium oxide into phosphorus deep removal slot, neutralize pH=10.0~
11.0, the slurry containing a small amount of solid enters subsider sedimentation after equally adding flocculant.
Reaction equation is as follows:
The invention has the following advantages that the processing method of sludge provided by the invention, using with slurry+neutralization+growing the grain+level-one
Flocculating setting+filters pressing+phosphorus deep removal+second level flocculating setting+product mix process flow, can handle metal surface waste and
The sludge generated in hot-working enterprise production process obtains fertilizer grade phosphate, turns waste into wealth while saving resource, both protected
Natural ecological environment has been protected, while having increased benefit；This method increase pretreatments with slurry, improve sludge and diluted acid main component
Between chemical reaction rate；Alkali growing the grain process is newly increased, the residence time is longer, improves the products such as phosphate and obtains and improve sedimentation
Effect；Level-one flocculating setting, second level flocculating setting add a small amount of flocculant respectively, improve effect of settling and segmentation plus alkali promotes
Metal hydroxides sedimentation.This method simple process, easy to operate, at low cost, suitable industrialized production.
Specific embodiment
Below with reference to embodiment, the present invention will be further described, and protection scope of the present invention is not limited to following institute
It states.
Embodiment 1: a kind of processing method of sludge, it the following steps are included:
S1. with slurry: sludge to be added in stock tank, addition water is dispersed with stirring to form slurry, and slurry obtains dirty through sedimentation separation
Body refuse and sedimentation clear liquid, sedimentation clear liquid is back to be recycled with stock tank, and the sedimentation separation is separated using horizontal screw machine, institute
The revolving speed for stating horizontal screw machine is 2800rad/min.
S2. neutralize: by moisture content be 80% phosphoric acid,diluted and sludge silt be slowly added in neutralization chamber carry out neutralization reaction obtain
To solidliquid mixture, the mass ratio of the phosphoric acid,diluted and sludge silt is 1:1；Wherein, the time of neutralization reaction is to add at normal temperature
Expect the reaction was continued 0.5h after 1h；
S3. growing the grain: solidliquid mixture obtained by step S2 is sent into growing the grain slot, and calcium oxide is added and is reacted, adjusts pH
Value is 6.0, obtains calcium monohydrogen phosphate slurry, wherein the time of reaction is the reaction was continued 0.5h, the oxygen after feeding 1h at normal temperature
The weight ratio for changing calcium and solidliquid mixture is 1:15；
S4. level-one flocculating setting: calcium monohydrogen phosphate slurry obtained by step S3 is sent into level-one subsider, and polyacrylamide is added
Amine is slowly stirred to form floc sedimentation, settles 1.5h, obtains calcium monohydrogen phosphate underflow, supernatant liquor is spare, and the polyacrylamide adds
Amount is 0.10kg/m3；
S5. filters pressing: being pumped into filter press for calcium monohydrogen phosphate underflow obtained by step S4 and calcium monohydrogen phosphate filter cake be made, and filtrate is spare,
The solid on filter cake is collected, fertilizer grade calcium monophosphate product is obtained, the filter press pressure is 0.6MPa, and filter cloth aperture is 320
Mesh；
Filtrate obtained by supernatant liquor obtained by step S4 and S5: being sent into phosphorus deep removal slot by S6. phosphorus deep removal at normal temperature,
And calcium oxide is added and carries out reaction 0.3h, adjusting pH value is 10.0, calcium phosphate slurry is obtained, the dosage of the calcium oxide is 1:
8；
S7. second level flocculating setting: calcium phosphate slurry obtained by step S6 is sent into secondary settling tank, and polyacrylamide is added
It is slowly stirred to form floc sedimentation, settles 1.5h, obtain calcium phosphate underflow, obtained solid is calcium phosphate after filters pressing, and filtrate returns with slurry
Slot, the polyacrylamide dosage are 0.02kg/m3；
S8. it product mix: calcium phosphate will be sent into dispersing device obtained by fertilizer grade calcium monophosphate product and S7 obtained by step S5
Mixing, as phosphate mixt.
Embodiment 2: a kind of processing method of sludge, it the following steps are included:
S1. with slurry: sludge to be added in stock tank, addition water is dispersed with stirring to form slurry, and slurry obtains dirty through sedimentation separation
Body refuse and sedimentation clear liquid, sedimentation clear liquid is back to be recycled with stock tank, and the sedimentation separation is separated using horizontal screw machine, institute
The revolving speed for stating horizontal screw machine is 3200rad/min.
S2. neutralize: by moisture content be 95% phosphoric acid,diluted and sludge silt be slowly added in neutralization chamber carry out neutralization reaction obtain
To solidliquid mixture, the mass ratio of the phosphoric acid,diluted and sludge silt is 1:3；Wherein, the time of neutralization reaction is to add at normal temperature
Expect the reaction was continued 1.5h after 3h；
S3. growing the grain: solidliquid mixture obtained by step S2 is sent into growing the grain slot, and calcium oxide is added and is reacted, adjusts pH
Value is 7.0, obtains calcium monohydrogen phosphate slurry, wherein the time of reaction is the reaction was continued 1.5h, the oxygen after feeding 3h at normal temperature
The weight ratio for changing calcium and solidliquid mixture is 1:25；
S4. level-one flocculating setting: calcium monohydrogen phosphate slurry obtained by step S3 is sent into level-one subsider, and polyacrylamide is added
Amine is slowly stirred to form floc sedimentation, settles 2.5h, obtains calcium monohydrogen phosphate underflow, supernatant liquor is spare, and the polyacrylamide adds
Amount is 0.15kg/m3；
S5. filters pressing: being pumped into filter press for calcium monohydrogen phosphate underflow obtained by step S4 and calcium monohydrogen phosphate filter cake be made, and filtrate is spare,
The solid on filter cake is collected, fertilizer grade calcium monophosphate product is obtained, the filter press pressure is 1.0MPa, and filter cloth aperture is 320
Mesh；
Filtrate obtained by supernatant liquor obtained by step S4 and S5: being sent into phosphorus deep removal slot by S6. phosphorus deep removal at normal temperature,
And calcium oxide is added and carries out reaction 1.0h, adjusting pH value is 11.0, calcium phosphate slurry is obtained, the dosage of the calcium oxide is 1:
14；
S7. second level flocculating setting: calcium phosphate slurry obtained by step S6 is sent into secondary settling tank, and polyacrylamide is added
It is slowly stirred to form floc sedimentation, settles 2.5h, obtain calcium phosphate underflow, obtained solid is calcium phosphate after filters pressing, and filtrate returns with slurry
Slot, the polyacrylamide dosage are 0.08kg/m3；
S8. it product mix: calcium phosphate will be sent into dispersing device obtained by fertilizer grade calcium monophosphate product and S7 obtained by step S5
Mixing, as phosphate mixt.
Embodiment 3: a kind of processing method of sludge, it the following steps are included:
S1. with slurry: sludge to be added in stock tank, addition water is dispersed with stirring to form slurry, and slurry obtains dirty through sedimentation separation
Body refuse and sedimentation clear liquid, sedimentation clear liquid is back to be recycled with stock tank, and the sedimentation separation is separated using horizontal screw machine, institute
The revolving speed for stating horizontal screw machine is 3200rad/min.
S2. neutralize: by moisture content be 90% phosphoric acid,diluted and sludge silt be slowly added in neutralization chamber carry out neutralization reaction obtain
To solidliquid mixture, the mass ratio of the phosphoric acid,diluted and sludge silt is 1:2；Wherein, the time of neutralization reaction is to add at normal temperature
Expect the reaction was continued 1h after 2h；
S3. growing the grain: solidliquid mixture obtained by step S2 is sent into growing the grain slot, and calcium oxide is added and is reacted, adjusts pH
Value is 6.5, obtains calcium monohydrogen phosphate slurry, wherein the time of reaction is the reaction was continued 1h, the oxidation after feeding 2h at normal temperature
The weight ratio of calcium and solidliquid mixture is 1:18；
S4. level-one flocculating setting: calcium monohydrogen phosphate slurry obtained by step S3 is sent into level-one subsider, and polyacrylamide is added
Amine is slowly stirred to form floc sedimentation, settles 2h, obtains calcium monohydrogen phosphate underflow, supernatant liquor is spare, the polyacrylamide dosage
For 0.13kg/m3；
S5. filters pressing: being pumped into filter press for calcium monohydrogen phosphate underflow obtained by step S4 and calcium monohydrogen phosphate filter cake be made, and filtrate is spare,
The solid on filter cake is collected, fertilizer grade calcium monophosphate product is obtained, the filter press pressure is 0.7MPa, and filter cloth aperture is 320
Mesh；
Filtrate obtained by supernatant liquor obtained by step S4 and S5: being sent into phosphorus deep removal slot by S6. phosphorus deep removal at normal temperature,
And calcium oxide is added and carries out reaction 0.6h, adjusting pH value is 10.5, calcium phosphate slurry is obtained, the dosage of the calcium oxide is 1:
10；
S7. second level flocculating setting: calcium phosphate slurry obtained by step S6 is sent into secondary settling tank, and polyacrylamide is added
It being slowly stirred to form floc sedimentation, settles 2h, obtain calcium phosphate underflow, obtained solid is calcium phosphate after filters pressing, and filtrate, which returns, matches stock tank,
The polyacrylamide dosage is 0.05kg/m3；
S8. it product mix: calcium phosphate will be sent into dispersing device obtained by fertilizer grade calcium monophosphate product and S7 obtained by step S5
Mixing, as phosphate mixt.
Embodiment 4: a kind of processing method of sludge, it the following steps are included:
S1. with slurry: sludge to be added in stock tank, addition water is dispersed with stirring to form slurry, and slurry obtains dirty through sedimentation separation
Body refuse and sedimentation clear liquid, sedimentation clear liquid is back to be recycled with stock tank, and the sedimentation separation is separated using horizontal screw machine, institute
The revolving speed for stating horizontal screw machine is 2900rad/min；
S2. neutralize: by moisture content be 85% phosphoric acid,diluted and sludge silt be slowly added in neutralization chamber carry out neutralization reaction obtain
To solidliquid mixture, the mass ratio of the phosphoric acid,diluted and sludge silt is 1:1；Wherein, the time of neutralization reaction is to add at normal temperature
Expect the reaction was continued 0.8h after 1.5h；
S3. growing the grain: solidliquid mixture obtained by step S2 is sent into growing the grain slot, and calcium oxide is added and is reacted, adjusts pH
Value is 6.8, obtains calcium monohydrogen phosphate slurry, wherein the time of reaction is the reaction was continued 1.2h after feeding 1.5h at normal temperature, described
The weight ratio of calcium oxide and solidliquid mixture is 1:20；
S4. level-one flocculating setting: calcium monohydrogen phosphate slurry obtained by step S3 is sent into level-one subsider, and polyacrylamide is added
Amine is slowly stirred to form floc sedimentation, settles 1.8h, obtains calcium monohydrogen phosphate underflow, supernatant liquor is spare, and the polyacrylamide adds
Amount is 0.11kg/m3；
S5. filters pressing: being pumped into filter press for calcium monohydrogen phosphate underflow obtained by step S4 and calcium monohydrogen phosphate filter cake be made, and filtrate is spare,
The solid on filter cake is collected, fertilizer grade calcium monophosphate product is obtained, the filter press pressure is 0.8MPa, and filter cloth aperture is 320
Mesh；
Filtrate obtained by supernatant liquor obtained by step S4 and S5: being sent into phosphorus deep removal slot by S6. phosphorus deep removal at normal temperature,
And calcium oxide is added and carries out reaction 0.8h, adjusting pH value is 10.8, calcium phosphate slurry is obtained, the dosage of the calcium oxide is 1:
12；
S7. second level flocculating setting: calcium phosphate slurry obtained by step S6 is sent into secondary settling tank, and polyacrylamide is added
It is slowly stirred to form floc sedimentation, settles 2.2h, obtain calcium phosphate underflow, obtained solid is calcium phosphate after filters pressing, and filtrate returns with slurry
Slot, the polyacrylamide dosage are 0.07kg/m3；
S8. it product mix: calcium phosphate will be sent into dispersing device obtained by fertilizer grade calcium monophosphate product and S7 obtained by step S5
Mixing, as phosphate mixt.
Embodiment 5: a kind of processing method of sludge, it the following steps are included:
S1. with slurry: sludge to be added in stock tank, addition water is dispersed with stirring to form slurry, and slurry obtains dirty through sedimentation separation
Body refuse and sedimentation clear liquid, sedimentation clear liquid is back to be recycled with stock tank, and the sedimentation separation is separated using horizontal screw machine, institute
The revolving speed for stating horizontal screw machine is 3100rad/min；
S2. neutralize: by moisture content be 82% phosphoric acid,diluted and sludge silt be slowly added in neutralization chamber carry out neutralization reaction obtain
To solidliquid mixture, the mass ratio of the phosphoric acid,diluted and sludge silt is 1:2；Wherein, the time of neutralization reaction is to add at normal temperature
Expect the reaction was continued 1.2h after 2.5h；
S3. growing the grain: solidliquid mixture obtained by step S2 is sent into growing the grain slot, and calcium oxide is added and is reacted, adjusts pH
Value is 6.2, obtains calcium monohydrogen phosphate slurry, wherein the time of reaction is the reaction was continued 0.9h after feeding 2.5h at normal temperature, described
The weight ratio of calcium oxide and solidliquid mixture is 1:22；
S4. level-one flocculating setting: calcium monohydrogen phosphate slurry obtained by step S3 is sent into level-one subsider, and polyacrylamide is added
Amine is slowly stirred to form floc sedimentation, settles 2.3h, obtains calcium monohydrogen phosphate underflow, supernatant liquor is spare, and the polyacrylamide adds
Amount is 0.14kg/m3；
S5. filters pressing: being pumped into filter press for calcium monohydrogen phosphate underflow obtained by step S4 and calcium monohydrogen phosphate filter cake be made, and filtrate is spare,
The solid on filter cake is collected, fertilizer grade calcium monophosphate product is obtained, the filter press pressure is 0.7MPa, and filter cloth aperture is 320
Mesh；
Filtrate obtained by supernatant liquor obtained by step S4 and S5: being sent into phosphorus deep removal slot by S6. phosphorus deep removal at normal temperature,
And calcium oxide is added and carries out reaction 0.7h, adjusting pH value is 10.7, calcium phosphate slurry is obtained, the dosage of the calcium oxide is 1:
13；
S7. second level flocculating setting: calcium phosphate slurry obtained by step S6 is sent into secondary settling tank, and polyacrylamide is added
It is slowly stirred to form floc sedimentation, settles 1.8h, obtain calcium phosphate underflow, obtained solid is calcium phosphate after filters pressing, and filtrate returns with slurry
Slot, the polyacrylamide dosage are 0.07kg/m3；
S8. it product mix: calcium phosphate will be sent into dispersing device obtained by fertilizer grade calcium monophosphate product and S7 obtained by step S5
Mixing, as phosphate mixt.
The sludge main source used in above-described embodiment is produces in Treatment of Metal Surface and hot-working enterprise production process
Raw sludge, see Table 1 for details for specific ingredient:
Table 1: sludge raw material composition
Claims (6)
1. a kind of processing method of sludge, which is characterized in that it the following steps are included:
S1. with slurry: sludge to be added in stock tank, addition water is dispersed with stirring to form slurry, and slurry obtains sludge silt through sedimentation separation
With sedimentation clear liquid, sedimentation clear liquid is back to be recycled with stock tank；
S2. it neutralizes: phosphoric acid,diluted and sludge silt being slowly added to progress neutralization reaction in neutralization chamber and obtain solidliquid mixture, it is described
The mass ratio of phosphoric acid,diluted and sludge silt is 1:1~3；Wherein, the time of neutralization reaction is to continue instead after feeding 1~3h at normal temperature
Answer 0.5~1.5h；
S3. growing the grain: sending solidliquid mixture obtained by step S2 into growing the grain slot, and calcium oxide be added and is reacted, and adjusts pH value and is
6.0~7.0, obtain calcium monohydrogen phosphate slurry, wherein and the time of reaction is that the reaction was continued 0.5 after feeding 1~3h at normal temperature~
The weight ratio of 1.5h, the calcium oxide and solidliquid mixture is 1:15~25；
S4. level-one flocculating setting: calcium monohydrogen phosphate slurry obtained by step S3 is sent into level-one subsider, and it is slow that flocculant is added
Stirring forms floc sedimentation, settles 1.5~2.5h, obtains calcium monohydrogen phosphate underflow, supernatant liquor is spare；
S5. filters pressing: being pumped into filter press for calcium monohydrogen phosphate underflow obtained by step S4 and calcium monohydrogen phosphate filter cake be made, and filtrate is spare, collects
Solid on filter cake obtains fertilizer grade calcium monophosphate product；
Filtrate obtained by supernatant liquor obtained by step S4 and S5: being sent into phosphorus deep removal slot by S6. phosphorus deep removal at normal temperature, and
Calcium oxide is added and carries out 0.3~1.0h of reaction, adjusting pH value is 10.0~11.0, calcium phosphate slurry is obtained, the calcium oxide
Dosage is 1:8~14；
S7. second level flocculating setting: calcium phosphate slurry obtained by step S6 is sent into secondary settling tank, and flocculant is added and slowly stirs
It mixes to form floc sedimentation, settles 1.5~2.5h, obtain calcium phosphate underflow, obtained solid is calcium phosphate after filters pressing, and filtrate returns with slurry
Slot；
S8. product mix: calcium phosphate obtained by fertilizer grade calcium monophosphate product and S7 obtained by step S5 is sent into dispersing device and is mixed
It closes, as phosphate mixt.
2. a kind of processing method of sludge as described in claim 1, which is characterized in that sedimentation separation described in step S1 is using sleeping
Spiral shell machine is separated, and the revolving speed of the horizontal screw machine is 2800~3200rad/min.
3. a kind of processing method of sludge as described in claim 1, which is characterized in that phosphoric acid,diluted described in step S2 it is aqueous
Rate is 80~95%.
4. a kind of processing method of sludge as described in claim 1, which is characterized in that flocculant described in step S4 is poly- third
Acrylamide, dosage are 0.10~0.15kg/m3。
5. a kind of processing method of sludge as described in claim 1, which is characterized in that filter press pressure described in step S5 is
0.6~1.0MPa, filter cloth aperture are 320 mesh.
6. a kind of processing method of sludge as described in claim 1, which is characterized in that flocculant described in step S7 is poly- third
Acrylamide, dosage are 0.02~0.08kg/m3。
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6111193A (en) * | 1984-06-28 | 1986-01-18 | Mitsubishi Heavy Ind Ltd | Treatment of waste liquid of chemical cleaning |
| CN1772601A (en) * | 2004-11-12 | 2006-05-17 | 自贡鸿鹤化工股份有限公司 | Hydrochloric acid process of producing feed level calcium diphosphate and gypsum coproduct |
| CN1994872A (en) * | 2006-12-21 | 2007-07-11 | 四川大学 | Technology for preparing fine calcium phosphate using phosphor-gypsum backwater and its wash liquid |
| CN102849703A (en) * | 2012-09-07 | 2013-01-02 | 四川大学 | Method for preparing fine calcium phosphate by using phosphogypsum desulfurization residue |
-
2016
- 2016-07-26 CN CN201610595285.7A patent/CN106186601B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6111193A (en) * | 1984-06-28 | 1986-01-18 | Mitsubishi Heavy Ind Ltd | Treatment of waste liquid of chemical cleaning |
| CN1772601A (en) * | 2004-11-12 | 2006-05-17 | 自贡鸿鹤化工股份有限公司 | Hydrochloric acid process of producing feed level calcium diphosphate and gypsum coproduct |
| CN1994872A (en) * | 2006-12-21 | 2007-07-11 | 四川大学 | Technology for preparing fine calcium phosphate using phosphor-gypsum backwater and its wash liquid |
| CN102849703A (en) * | 2012-09-07 | 2013-01-02 | 四川大学 | Method for preparing fine calcium phosphate by using phosphogypsum desulfurization residue |
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