CN102225830A - Resource treatment method for urban sludge - Google Patents
Resource treatment method for urban sludge Download PDFInfo
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- CN102225830A CN102225830A CN 201110127917 CN201110127917A CN102225830A CN 102225830 A CN102225830 A CN 102225830A CN 201110127917 CN201110127917 CN 201110127917 CN 201110127917 A CN201110127917 A CN 201110127917A CN 102225830 A CN102225830 A CN 102225830A
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Abstract
The present invention discloses a resource treatment method for urban sludge, which comprises the following steps of: ultrasonically treating the urban sludge, transferring to an expander, sealing, heating until the internal gas temperature reaches 120-160 DEG C and the pressure reaches 2-5 atm, opening the extruder cover, cooling to room temperature and taking out the sludge. The resource treatment method achieves the volume reduction and dewatering of the urban sludge, improves the combustion value of the sludge, simultaneously reduces the secondary pollution of heavy metals, pathogens and other harmful substances in the urban sludge, and achieves volume reduction, harmlessness and resource treatment of the urban sludge.
Description
Technical field
The field is disposed in the environmental protection that the present invention relates to municipal sludge, and what be specifically related to a kind of municipal sludge subtracts appearanceization, innoxious, recycling processing method.
Background technology
China municipal sewage plant is annual to produce about about 3,000 ten thousand tons of the mud of water content 80%, and with 10% speed increment.At present, most mud do not obtain appropriate disposal, the phenomenon ubiquity of arbitrarily abandoning, toppling over, to a certain extent even offset the achievement of pollution emission reduction.Mud is big because of water content height, volume, easily corrupt, processing cost is high, accounts for the 40%-60% of entire sewage technology running cost, mud is difficult to handle, and is because its high-moisture and difficult dehydration characteristic to a great extent.Contain eutrophication element, pathogenic micro-organism, parasitic ovum, heavy metal and other objectionable impuritiess such as a large amount of organism, nitrogen, phosphorus in the mud, character is extremely unstable, easily corruption is smelly, as not dealing carefully with and disposing, to pollute and stack environment on every side such as geographic water body, soil and atmosphere, and HUMAN HEALTH will be worked the mischief.Simultaneously mud is not no-good waste, contains nutritive element such as the needed nitrogen of plant-growth, phosphorus, potassium in the mud and keeps various trace elements that plant normal growth grows and the organism and the soil ulmin of the structure of improving the soil; It is many to contain organism in the mud simultaneously, and the potential reserves of mud are very big, more and more is subjected to people's attention as " second resource ".Outstanding along with environmental problem, the priority that it has been recognized that sludge treatment, disposal is to subtract appearance, recycling, discarded.
In most of the cases, raw sludge is after concentrated, digestion, dehydration make reducing sludge volume, and as fertilizer sources and soil improvement agent are used for agricultural, forestry, afforestation or carry out methods such as landfill, burning, row sea and dispose.From the eighties in 20th century to the nineties, western developed country to the disposal of mud and the up-to-date trend of utilization is:
1) throwing extra large method of disposal is abandoned;
2) landfill is disposed proportion reduction by a relatively large margin;
3) the incineration disposal technology is still important;
4) agriculture reuse is increasingly important.
Therefore we dispose sludge incineration and the best home to return to of agriculture reuse as sludge disposal, must be to hold that dehydration, fuel value improve, carry out under the harmless stable prerequisite subtracting but these two kinds of disposal options require mud.With regard to present measure, can to mud subtract simultaneously hold dehydration, harmless stable, improve the also few of fuel value, therefore develop a kind of mud subtract appearanceization, innoxious, method of resource is imperative.
Summary of the invention
The object of the present invention is to provide and a kind ofly can realize that municipal sludge subtracts and hold dehydration, improve the sludge incineration value, reduce simultaneously the secondary pollution of objectionable impurities such as heavy metal and pathogenic agent in the mud municipal sludge subtract appearanceization, innoxious, recycling processing method.
The recycling processing method of municipal sludge of the present invention, adopt following step:
Municipal sludge is carried out supersound process, transfer in the bulking machine, airtight post-heating treats that the internal gas temperature reaches 120-160 ℃, when pressure reaches 2-5 atm, opens expanded cover, after waiting to be chilled to room temperature, the mud taking-up is got final product.
Preferably, described municipal sludge supersound process at least 30 minutes under frequency frequency 800-1000 MHz.
Described municipal sludge adds carbonate raising agent such as yellow soda ash, bicarbonate of ammonia, sodium bicarbonate, salt of wormwood, saleratus etc. and mud can better be disperseed before supersound process.
The consumption of described raising agent is good when being the 10-30% of municipal sludge quality.
The described airtight internal gas temperature that is heated to reaches 140-150 ℃, when pressure reaches 3-4 atm, opens expanded cover again, can realize the expanded dispersive effect of mud like this.
A kind of municipal sludge provided by the invention subtracts appearanceization, method innoxious, resource utilization can significantly be removed the moisture (free-water, capillary water, internal water) in the mud, make mud concentrate, dewater, sludge volume reduces, and the mud after the dehydration has solid property, becomes the clod shape; Harmful microorganisms such as the pathogenic bacterium that contain in the mud, parasite are eliminated after treatment in addition, and the heavy metal in the mud is passivated, and reduce the possibility of objectionable impurities secondary pollutions such as heavy metal and pathogenic agent, are applicable to agriculture reuse; Mud fuel value after treatment improves, and is convenient to incineration disposal.Principle of the present invention is: with ultrasonic technique and puffing technique coupling, mud is carried out improved treatment.At first ultrasonic wave produces cavitation by alternative compression and dilating effect, this acts in the wet mud formation with microbubble, grows and break and embody, with this crush cell wall, discharge contained composition in the cell, strengthen the degradability of cell, harmful microorganism cell in the mud is killed, also be beneficial to sludge dewatering and reducing sludge volume simultaneously, improve the dispersiveness and the porosity of mud; Then the mud after supersound process is transferred in the bulking machine, encloses container to bulking machine inside heats, make mud be in high-temperature high-pressure state, when temperature is elevated to a certain degree (130-150 ℃), moisture in the mud becomes water vapour, cause sludge bulking, then throwing open pressurized vessel seals, make the mud granule inside and outside differential pressure become big, mud granule inner high voltage water vapour sharply expands, and the instantaneous mud granule that pops is removed the moisture (free-water, capillary water, internal water) in the mud significantly, make mud concentrate, dewater, mud significantly subtracts appearance; The fractal structure that this puffing process is reunited mud granule structure and mud granule changes, and helps improving the fuel value of mud.
Beneficial effect of the present invention is:
1, mud after treatment, mud significantly subtracts appearance, water content can be reduced to 20-30% from 80-90%;
2, because the reducing sludge volume decrement reaches 60-70%, it is original about 1/3rd that outer freight volume of mud and amount of landfill have only, and can reduce transportation cost and landfill cost significantly, saves landfill yard storage capacity, reduces the secondary pollution risk that wet mud landfill may cause;
3, harmful microorganisms such as the pathogenic bacterium that contain in the mud, parasite basic complete deactivation after ultrasonic, expanded;
4, after expanded, the heavy metal toxicity that contains in the mud descends, the exchangeable species heavy metal content significantly descends in the mud: exchangeable species copper (Cu) and zinc (Zn) content drop to original about 30%, and the exchangeable species lead (Pb) in the mud of expanded burning back and the content of cadmium (Cd) are near trace.
5, owing to reduced sludge moisture content, can reduce drying sludge heat energy significantly, realize the clean output of sludge heat energy, and can improve the sludge incineration processing power greatly;
6, after expanded, under the situation of not adding raising agent, the fuel value of mud is brought up to 5000-7000 J/g from 3000-5000 J/g, behind the interpolation raising agent, can further improve 10000-14000 J/g, even half of approaching mark coal combustion value (29274 J/g).
Embodiment
Embodiment 1
To be about 80% municipal sludge (about 3200 J/g of fuel value) by pressure filter press filtration to water content, take by weighing 1 kilogram of ultrasonic apparatus of putting into 2 L capacity, supersound process is 50 minutes under frequency 900-950MHz, and then be transferred to airtight post-heating in the bulking machine, treat that the internal gas temperature reaches about 150 ℃, when pressure reaches about 3 atm, open expanded cover rapidly, after waiting to be chilled to room temperature, take out mud, measured moisture content is 23%, fuel value 5500J/g, harmful microorganisms such as pathogenic bacterium, parasite be basic complete deactivation after ultrasonic, expanded; And it is original about 30% that exchangeable species copper (Cu) and zinc (Zn) content drop to, and the exchangeable species lead (Pb) in the mud of expanded burning back and the content of cadmium (Cd) are near trace, and detected result is as shown in table 1.
Embodiment 2
To be about 80% municipal sludge by the pressure filter press filtration to water content, take by weighing 1 kilogram and add the sodium bicarbonate raising agent mixing of 20% sludge quality, put into the ultrasonic apparatus of 2 L capacity, supersound process is 30 minutes under frequency 900-950MHz, and then is transferred in the bulking machine, airtight post-heating, reach about 150 ℃, when pressure reaches about 3 atm, open expanded cover rapidly, after waiting to be chilled to room temperature Deng the internal gas temperature, the mud taking-up is got final product, and detected result is as shown in table 1.
Embodiment 3
To be about 80% municipal sludge by the pressure filter press filtration to water content, take by weighing 3 kilograms of ultrasonic apparatus of putting into 6 L capacity, supersound process is 50 minutes under frequency 915MHz, and then be transferred in the bulking machine, airtight post-heating waits that the internal gas temperature reaches about 140 ℃, when pressure reaches about 4 atm, open expanded cover rapidly, after waiting to be chilled to room temperature, the mud taking-up is got final product, detected result is as shown in table 1.
Embodiment 4
To be about 80% municipal sludge by the pressure filter press filtration to water content, take by weighing 3 kilograms and add the yellow soda ash raising agent mixing of 20% sludge quality, put into the ultrasonic apparatus of 6L capacity, supersound process is 30 minutes under frequency 880-920MHz, and then is transferred in the bulking machine, airtight post-heating, reach about 150 ℃, when pressure reaches 3-4 atm, open expanded cover rapidly Deng the internal gas temperature, after waiting to be chilled to room temperature, the mud taking-up is got final product, and detected result is as shown in table 1.
Table 1
Claims (6)
1. the recycling processing method of a municipal sludge is characterized in that: adopt following step:
Municipal sludge is carried out supersound process, transfer in the bulking machine, airtight post-heating treats that the internal gas temperature reaches 120-160 ℃, when pressure reaches 2-5 atm, opens expanded cover, after waiting to be chilled to room temperature, the mud taking-up is got final product.
2. the recycling processing method of municipal sludge as claimed in claim 1 is characterized in that: described municipal sludge supersound process at least 30 minutes under frequency 800-1000MHz.
3. the recycling processing method of municipal sludge as claimed in claim 1, it is characterized in that: described municipal sludge adds the carbonate raising agent before supersound process.
4. the recycling processing method of municipal sludge as claimed in claim 3, it is characterized in that: described carbonate raising agent is yellow soda ash, bicarbonate of ammonia, sodium bicarbonate, salt of wormwood or saleratus.
5. as the recycling processing method of claim 3 or 4 described municipal sludges, it is characterized in that: the consumption of described raising agent is the 10-30% of municipal sludge quality.
6. the recycling processing method of municipal sludge as claimed in claim 1, it is characterized in that: the described airtight internal gas temperature that is heated to reaches 140-150 ℃, when pressure reaches 3-4 atm, opens expanded cover again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110127917 CN102225830A (en) | 2011-05-18 | 2011-05-18 | Resource treatment method for urban sludge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110127917 CN102225830A (en) | 2011-05-18 | 2011-05-18 | Resource treatment method for urban sludge |
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| CN102225830A true CN102225830A (en) | 2011-10-26 |
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| CN 201110127917 Pending CN102225830A (en) | 2011-05-18 | 2011-05-18 | Resource treatment method for urban sludge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765840A (en) * | 2011-12-26 | 2012-11-07 | 林国辉 | Supersonic sewage treatment instrument |
| CN107118786A (en) * | 2017-05-05 | 2017-09-01 | 李苏卿 | For domestic sludge, the microwave cracking machine of stalk and microwave cracking method |
| CN108726821A (en) * | 2017-04-25 | 2018-11-02 | 湖南大学 | A kind of heavy metal sewage sludge innocuity disposal system and method |
| CN117049829A (en) * | 2023-08-15 | 2023-11-14 | 江西新迪建材有限公司 | Calcium silicate board doped with purified cotton pulp sludge and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11267606A (en) * | 1998-03-26 | 1999-10-05 | Ube Ind Ltd | Treatment of waste and its apparatus |
| JP2001225056A (en) * | 2000-02-15 | 2001-08-21 | Katsumi Iida | Method for treating liquid-containing waste |
| CN1416408A (en) * | 2000-10-06 | 2003-05-07 | 艾伯株式会社 | Method and appts. for reducing excessive mud |
| CN101143759A (en) * | 2007-08-22 | 2008-03-19 | 史鸣放 | Sludge treatment method used for sewage disposal plant |
-
2011
- 2011-05-18 CN CN 201110127917 patent/CN102225830A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11267606A (en) * | 1998-03-26 | 1999-10-05 | Ube Ind Ltd | Treatment of waste and its apparatus |
| JP2001225056A (en) * | 2000-02-15 | 2001-08-21 | Katsumi Iida | Method for treating liquid-containing waste |
| CN1416408A (en) * | 2000-10-06 | 2003-05-07 | 艾伯株式会社 | Method and appts. for reducing excessive mud |
| CN101143759A (en) * | 2007-08-22 | 2008-03-19 | 史鸣放 | Sludge treatment method used for sewage disposal plant |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765840A (en) * | 2011-12-26 | 2012-11-07 | 林国辉 | Supersonic sewage treatment instrument |
| CN102765840B (en) * | 2011-12-26 | 2014-04-30 | 林国辉 | Supersonic sewage treatment instrument |
| CN108726821A (en) * | 2017-04-25 | 2018-11-02 | 湖南大学 | A kind of heavy metal sewage sludge innocuity disposal system and method |
| CN107118786A (en) * | 2017-05-05 | 2017-09-01 | 李苏卿 | For domestic sludge, the microwave cracking machine of stalk and microwave cracking method |
| CN117049829A (en) * | 2023-08-15 | 2023-11-14 | 江西新迪建材有限公司 | Calcium silicate board doped with purified cotton pulp sludge and preparation method thereof |
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Application publication date: 20111026 |