CN100558662C - A kind of process for treating sludge - Google Patents
A kind of process for treating sludge Download PDFInfo
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- CN100558662C CN100558662C CNB2007100214871A CN200710021487A CN100558662C CN 100558662 C CN100558662 C CN 100558662C CN B2007100214871 A CNB2007100214871 A CN B2007100214871A CN 200710021487 A CN200710021487 A CN 200710021487A CN 100558662 C CN100558662 C CN 100558662C
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- treating sludge
- catalyzer
- aftertreatment
- fertilizer
- spray waterfall
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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Abstract
The invention discloses a kind of process for treating sludge, comprise pre-treatment, aftertreatment, described aftertreatment comprise pyrogenic processes, spray waterfall operation, dehydration procedure, solid ammonia operation, composting operation; Described pyrogenic processes is 3-5 for earlier mud cake being adjusted to the pH value with industrial sulphuric acid, add organic weighting material, catalyzer, under the pressure of 1.1-1.5MPa, in 190-220 ℃ of insulation 2-4 hour, be cooled to room temperature and get final product, mud cake: organic weighting material: the weight ratio of catalyzer is 4: 0.5-1: 0.001-0.005.The present invention compared with prior art; the aftertreatment time is short, municipal sludge can be mixed with inorganic fertilizer, makes to can be used for the compound particle fertilizer of organic-inorganic that seed sower is sowed; to improving crop yield, protecting soil that positive effect is arranged, be agricultural fertilizer kind with large development potentiality.
Description
Technical field:
The invention belongs to this technical field of treatment process of mud, belong to this technical field of treatment process of municipal wastewater treatment plant mud especially.
Background technology:
The sewage treatment process of modern city sewage work is divided into sewage disposal and sludge treatment is handled two parts, and sludge treatment is divided into pre-treatment and aftertreatment, pre-treatment is meant mud through concentrating, be dehydrated into mud cake, the water content of mud cake is 75-80%, and post-treating method is various ways such as burning, landfill, throwing sea and compost.The technology of burning method and equipment complexity, energy consumption is big, and investment is high, and with atmosphere polluting problem; Landfill method is subjected to the restriction of land used; Throwing the Haifa can Marine Pollution, can threaten to the marine ecosystem human foods chain of unifying, and international convention is prohibited; The composting process floor space is big, and the production cycle is long, in air exposure duration long, foul gas discharging is serious, simultaneously to a large amount of CO of airborne release
2, CH
4Isothermal chamber gas and H
2Gas such as S, thiomethyl alcohol, serious environment pollution, the finished product nutritive ingredient is low, the relative proportion height of heavy metal, harmful pathogenic toxin.
Summary of the invention:
Technical problem to be solved by this invention provides a kind of new process for treating sludge.
The technical scheme of technical solution problem of the present invention is: a kind of process for treating sludge, comprise pre-treatment, and aftertreatment, described aftertreatment comprise pyrogenic processes, spray waterfall operation, dehydration procedure, solid ammonia operation, composting operation;
Described pyrogenic processes is 3-5 for earlier mud cake being adjusted to pH value with industrial sulphuric acid, add organic weighting material, catalyzer, under the pressure of 1.1-1.5Mpa, in 190-220 ℃ of insulation 2-4 hour, be cooled to room temperature and get final product, mud cake: organic weighting material: the weight ratio of catalyzer is 4: 0.5-1: 0.001-0.005.
Described organic weighting material is a straw.
Described catalyzer is nano level iron trichloride, aluminum chloride.
Described dehydration procedure is: being the 6000-10000r/min horizontal spiral centrifuge with rotating speed dewaters to the material behind the spray waterfall.
Described solid ammonia operation is: at pressure 0.9-1.4Mpa, temperature 150-200 ℃, pH value 7.5-9.0 feeds liquefied ammonia down, is incubated 1-5 hour;
Described composting operation is: according to made composite fertilizer, add P, K, flyash in the good material of fixed nitrogen, granulate according to prior art then, make fertilizer.
Pyrogenic processes of the present invention can make the dewatering of mud significantly improve, and its effect is as follows:
1. mud causes cohesion, destroys colloidal structure under the effect of high temperature and high pressure steam, makes attached to the combination water around the small-particle and discharges (synersis phenomenon)
2. cytolemma is destroyed, and internal water and planar water are dissociated out.Comprising solvend and soluble thing.
3. the increase of solvend after the destruction of cell paste and the hydrolysis is greatly improved dewatering and settling property.
4. can all kill pathogenic microorganism and parasitic ovum in the mud.
5. acidic conditions helps dissolving in of heavy metal, provides condition to heavy metal.
6. solved the deodorization problem of mud.
The present invention compared with prior art; the aftertreatment time is short, municipal sludge can be mixed with inorganic fertilizer, makes to can be used for the compound particle fertilizer of organic-inorganic that seed sower is sowed; to improving crop yield, protecting soil that positive effect is arranged, be agricultural fertilizer kind with large development potentiality.
Embodiment:
The embodiment of indefiniteness is as follows:
Embodiment 1:
A, pyrogenic processes:
With 4 tons of mud cakes, in the pre-treatment jar, add 0.5 ton of straw again through the mud infusion through pre-treatment, send into the pre-treatment jar through transfer roller, add industrial sulphuric acid, the pH value that is adjusted to mud is 3.05, add 1 kilogram of nano level iron trichloride again, after mixing stirring, join in the hydrolyzation material storage tank, after finishing charging, close charging/discharging valve, open intake valve, make pressure reach 1.1Mpa, 150 ℃ of temperature (needing half an hour approximately), pressurize 2 hours, 30-45 before discharging minute, should stop to stir.After pressurize finishes, open water drain valve, the clear liquor that pyrolysis is produced is directly discharged, treat that discharge opeing is finished after, can open steam escape valve, the water up to 150 ℃ in jar is reduced to below 100 ℃ fast because of evaporation, water vapour is discharged through the exhaust purifier system.
B: spray waterfall operation:
Open the warm air valve, make the hot gas of warm air storage tank enter hydrolytic decomposition pot,, close vent valve and make a jar internal gas pressure reach 0.6Mpa, after pressurize 5-10 minute, carry out the spray waterfall of material through after an amount of ventilation and exhaust.Spray waterfall helps moisture evaporation and improves the physical behavior of material.
C: dehydration procedure:
Through the material of pyrogenic processes, spray waterfall, its water content is dewatered to material after spraying waterfall with the 6000r/min horizontal spiral centrifuge, below material dewatering to 40% about 60%.And the back material that will dewater is delivered to the composting raw material storage tank.
D: Gu the ammonia operation:
For the fertilizer efficiency and the stability of the finished product organic nitrogenous fertilizer that strengthens sludge treatment, the mud after the dehydration is directly sent into solid ammonia jar as the composting raw material, carry out solid ammonia treatment, Gu the main technique condition of ammonia is: pressure 0.9Mpa, 150 ℃ of temperature, pH value 7.5.Be incubated 1 hour, in heating, in jar, feed liquefied ammonia by processing requirement.
E: composting operation:
Through the material of solid ammonia, according to made composite fertilizer, add P, K, flyash, be granulation, dry cooling, packing warehouse-in through traditional fertilize preparation craft again.
Embodiment 2:
A, pyrogenic processes:
With 4 tons of mud cakes through pre-treatment, in the pre-treatment jar, add 0.8 ton of straw through the mud infusion again, send into the pre-treatment jar through transfer roller, add industrial sulphuric acid, the pH value that is adjusted to mud is 4.15, adds 2 kilograms of nano level iron trichlorides again, after mixing stirring, join in the hydrolyzation material storage tank, after finishing charging, close charging/discharging valve, open intake valve, make pressure reach 1.25Mpa, 190 ℃ of temperature (needing half an hour approximately), pressurize 3 hours, the 30-45 before discharging minute, should stop to stir, pressurize is opened water drain valve after finishing, and the clear liquor that pyrogenic processes is produced is directly discharged.After treating that discharge opeing is finished, can open steam escape valve, the water up to 190 ℃ in jar is reduced to below 100 ℃ fast because of evaporation, and water vapour is discharged through the exhaust purifier system.
B: spray waterfall operation:
Open the warm air valve, make the hot gas of warm air storage tank enter hydrolytic decomposition pot,, close vent valve and make a jar internal gas pressure reach 0.6Mpa, after pressurize 5-10 minute, carry out the spray waterfall of material through after an amount of ventilation and exhaust.Spray waterfall helps moisture evaporation and improves the physical behavior of material.
C: dehydration procedure:
Through the material of pyrogenic processes, spray waterfall, its water content is dewatered to spray waterfall material with the 8000r/min horizontal spiral centrifuge, below material dewatering to 40% about 60%.And the back material that will dewater is delivered to the composting raw material storage tank.
D: Gu the ammonia operation:
For the fertilizer efficiency and the stability of the finished product organic nitrogenous fertilizer that strengthens sludge treatment, the mud after the dehydration is directly sent into solid ammonia jar as the composting raw material, carry out solid ammonia treatment, Gu the main technique condition of ammonia is: pressure 1.2Mpa, 170 ℃ of temperature, pH value 8.5.Be incubated 2 hours, in heating, feed liquefied ammonia in the jar mutually by processing requirement.
E: composting operation:
Through the material of solid ammonia, according to made composite fertilizer, add P, K, flyash, be granulation, dry cooling, packing warehouse-in through traditional fertilize preparation craft again.
Embodiment 3:
A, pyrogenic processes:
With 4 tons of mud cakes through pre-treatment, in the pre-treatment jar, add 1 ton of straw through the mud infusion again, send into the pre-treatment jar through transfer roller, add industrial sulphuric acid, the pH value that is adjusted to mud is 4.85, adds 5 kilograms of nano level aluminum chlorides again, after mixing stirring, join in the hydrolyzation material storage tank, after finishing charging, close charging/discharging valve, open intake valve, make pressure reach 1.25Mpa, 220 ℃ of temperature (needing half an hour approximately), pressurize 4 hours, the 30-45 before discharging minute, should stop to stir, pressurize is opened water drain valve after finishing, and the clear liquor that pyrogenic processes is produced is directly discharged.After treating that discharge opeing is finished, can open steam escape valve, the water up to 190 ℃ in jar is reduced to below 100 ℃ fast because of evaporation, and water vapour is discharged through the exhaust purifier system.
B: spray waterfall operation:
Open the warm air valve, make the hot gas of warm air storage tank enter hydrolytic decomposition pot,, close vent valve and make a jar internal gas pressure reach 0.6Mpa, after pressurize 5-10 minute, carry out the spray waterfall of material through after an amount of ventilation and exhaust.Spray waterfall helps moisture evaporation and improves the physical behavior of material.
C: dehydration procedure:
Through the material of pyrogenic processes, spray waterfall, estimate water content about 60%, with the 10000r/min horizontal spiral centrifuge spray waterfall material is dewatered, below material dewatering to 40%.And the back material that will dewater is delivered to the composting raw material storage tank.
D: Gu the ammonia operation:
For the fertilizer efficiency and the stability of the finished product organic nitrogenous fertilizer that strengthens sludge treatment, the mud after the dehydration is directly sent into solid ammonia jar as the composting raw material, carry out solid ammonia treatment, Gu the main technique condition of ammonia is: pressure 1.4Mpa, 200 ℃ of temperature, pH value 8.8.Be incubated 5 hours, in heating, feed liquefied ammonia in the jar mutually by processing requirement.
E: composting operation:
Through the material of solid ammonia, according to made composite fertilizer, add P, K, flyash, be granulation, dry cooling, packing warehouse-in through traditional fertilize preparation craft again.
Embodiment 1-3 tests by NY525-2002 country agricultural industry criteria.
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Outward appearance | Chocolate does not have mechanical impurity | Chocolate does not have mechanical impurity | Chocolate does not have mechanical impurity |
| Smell | Ordorless | Ordorless | Ordorless |
| Organic content (%) | 40 | 41 | 42 |
| Total nutrient (%) 〉= | 4.0 | 4.1 | 4.2 |
| Moisture (%) | 20 | 18 | 17 |
| PH | 6.5 | 7.5 | 7.2 |
Embodiment 1-3 tests according to GB8172, all fails to detect intestinal bacteria, and the worm egg mortality ratio is 100%.
Claims (7)
1, a kind of process for treating sludge comprises pre-treatment, and aftertreatment is characterized in that: described aftertreatment comprises pyrogenic processes, spray waterfall operation, dehydration procedure, solid ammonia operation and composting operation;
Described pyrogenic processes is 3-5 for earlier mud cake being adjusted to the pH value with industrial sulphuric acid, add organic weighting material, catalyzer, under the pressure of 1.1-1.5Mpa, in 190-220 ℃ of insulation 2-4 hour, be cooled to room temperature and get final product, mud cake: organic weighting material: the weight ratio of catalyzer is 4: 0.5-1: 0.001-0.005.
2, a kind of process for treating sludge according to claim 1, it is characterized in that: described spray waterfall operation is: open the warm air valve, make the hot gas of warm air storage tank enter hydrolytic decomposition pot, through after an amount of ventilation and exhaust, closing vent valve makes a jar internal gas pressure reach 0.6Mpa, after pressurize 5-10 minute, carry out the spray waterfall of material.
3, a kind of process for treating sludge according to claim 1 is characterized in that: described organic weighting material is a straw.
4, a kind of process for treating sludge according to claim 1 is characterized in that: described catalyzer is nano level iron trichloride or aluminum chloride.
5, a kind of process for treating sludge according to claim 1, it is characterized in that: described dehydration procedure is: being the 6000-10000r/min horizontal spiral centrifuge with rotating speed dewaters to the material behind the spray waterfall.
6, a kind of process for treating sludge according to claim 1 is characterized in that: described solid ammonia operation is: at pressure 0.9-1.4Mpa, temperature 150-200 ℃, pH value 7.5-9.0 feeds liquefied ammonia down, is incubated 1-5 hour.
7, a kind of process for treating sludge according to claim 1 is characterized in that: described composting operation is: according to made composite fertilizer, add P, K, flyash in the good material of solid ammonia, granulate according to prior art then, make fertilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100214871A CN100558662C (en) | 2007-04-10 | 2007-04-10 | A kind of process for treating sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100214871A CN100558662C (en) | 2007-04-10 | 2007-04-10 | A kind of process for treating sludge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101081716A CN101081716A (en) | 2007-12-05 |
| CN100558662C true CN100558662C (en) | 2009-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100214871A Expired - Fee Related CN100558662C (en) | 2007-04-10 | 2007-04-10 | A kind of process for treating sludge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100558662C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107459237B (en) | 2017-09-18 | 2018-09-25 | 华中科技大学 | Based on the sludge composite conditioner of iron containing sludge pyrolysis residue and its preparation and application |
-
2007
- 2007-04-10 CN CNB2007100214871A patent/CN100558662C/en not_active Expired - Fee Related
Non-Patent Citations (4)
| Title |
|---|
| 污水处理中的污泥脱水技术研究进展. 陈世朋等.污染防治技术，第19卷第1期. 2006 |
| 污水处理中的污泥脱水技术研究进展. 陈世朋等.污染防治技术，第19卷第1期. 2006 * |
| 污水污泥的热解处理. 王琼等.再生资源研究，第4期. 2004 |
| 污水污泥的热解处理. 王琼等.再生资源研究，第4期. 2004 * |
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| Publication number | Publication date |
|---|---|
| CN101081716A (en) | 2007-12-05 |
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Granted publication date: 20091111 Termination date: 20110410 |