CN104743765A - Two-stage sludge drying treatment method - Google Patents
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- 239000010802 sludge Substances 0.000 title claims abstract description 69
- 238000001035 drying Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000004568 cement Substances 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 30
- 239000002912 waste gas Substances 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims description 24
- 230000001877 deodorizing effect Effects 0.000 claims description 14
- 239000012855 volatile organic compound Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 230000003647 oxidation Effects 0.000 claims description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 5
- 235000011194 food seasoning agent Nutrition 0.000 claims description 4
- 238000003860 storage Methods 0.000 abstract description 2
- 238000004332 deodorization Methods 0.000 abstract 1
- 239000010801 sewage sludge Substances 0.000 description 12
- 239000010865 sewage Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 9
- 239000002918 waste heat Substances 0.000 description 9
- 238000003756 stirring Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 229920000297 Rayon Polymers 0.000 description 4
- 238000007605 air drying Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 235000019739 Dicalciumphosphate Nutrition 0.000 description 1
- AGWMJKGGLUJAPB-UHFFFAOYSA-N aluminum;dicalcium;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Ca+2].[Ca+2].[Fe+3] AGWMJKGGLUJAPB-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 description 1
- NEFBYIFKOOEVPA-UHFFFAOYSA-K dicalcium phosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])([O-])=O NEFBYIFKOOEVPA-UHFFFAOYSA-K 0.000 description 1
- 229940038472 dicalcium phosphate Drugs 0.000 description 1
- 229910000390 dicalcium phosphate Inorganic materials 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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- 238000002203 pretreatment Methods 0.000 description 1
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- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910021534 tricalcium silicate Inorganic materials 0.000 description 1
- 235000019976 tricalcium silicate Nutrition 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Abstract
The invention provides a two-stage sludge drying treatment method comprising the following steps: adding 5-30% of deodorization and breaking mixture into sludge with a high water content larger than 80% to obtain alkaline sludge, conveying the alkaline sludge into a one-stage drying machine, meanwhile introducing waste gas of 350-450 DEG C at the kiln tail of a cement kiln to carry out one-stage drying, after the one-stage drying treatment, conveying the sludge into a two-stage drying machine, introducing waste gas of 250-350 DEG C at a low temperature segment of a grate cooler to carry out two-stage drying, after the two-stage drying treatment, conveying the sludge to a sludge storage bin, drying the sludge to a water content lower than 20% at a natural drying state, and conveying the sludge into a decomposing furnace of the cement kiln for burning. According to the two-stage sludge drying treatment method provided by the invention, the afterheat of the waste gas of the cement kiln is completely utilized, and thus no external heat source is used; odor can be eliminated while drying the sludge, which is conducive to subsequent sludge treatment.
Description
Technical field
The present invention relates to solid waste recycling field, especially for the technology relating to sludge in-situ reodorant and utilize cement kiln residual heat to dry sludge, be specially a kind of two-part drying and other treatment sludge method.
Background technology
Along with the develop rapidly of economy and going deep into of Development of China's Urbanization, the municipal sewage treatment amount of China is increasing year by year.Municipal sewage sludge results from the stage of the biochemical treatment of city domestic sewage, mainly comes from the first of sewage treatment plants and secondary sedimentation basins, and the volume produced when being city domestic sewage process is maximum, the byproduct that the most easily produces secondary pollution.The generation of mud is large, and processing 1000 tons of city domestic sewages, about to produce 1 ton of water ratio be the mud of 80%.In whole construction costs of sewage work, the part for sludge treatment can reach 70%.Without after the mud entered environment that appropriate process is disposed, bring secondary pollution directly to water body and air, not only reduce the effective processing capacity of Sewage treatment systems, and serious threat is constituted to the activity of ecotope and the mankind.
The water ratio of dewatered sludge is high, generally 75 ~ 85%, if dewatered sludge to be directly used in above-mentioned process disposing technique, there is a lot of problem: 1) the wet high sludge calorific value that causes of mud moisture content is low, and utility value reduces; 2) characteristic of mud itself makes it be difficult to mummification, consumes energy high, adds and utilize cost; 3) mud stickiness is large, and easily bond wall, blocking and etching apparatus; 4) wet mud state labile easily produces biogas in storage, and produces dust and volatile fuel in production process, brings the potential safety hazard such as spontaneous combustion and blast.
Therefore, the water ratio height of dewatered sludge is that it processes the obstacle disposed further, and this just requires that mud must carry out mummification and reduce water ratio, to meet the requirement of minimizing and resource utilization.Another problem simultaneously can not ignored in the sludge treatment stage is malodor problem, and the stench of mud brings serious impact to environment, if do not solve stench, the mud of mummification is also difficult to be utilized.
Because the These characteristics of mud, in lignin-sludge and recycling process, there is a lot of difficulty and require all higher to equipment requirements, power consumption, in general sewage work, the process of mud will expend most human and financial resources.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of sludge in-situ deodorizing, solve mud broken wall and stink simultaneously, the method of indigestion extra power dewatered sludge as far as possible, the method is used for sludge drying process, gained moisture percentage in sewage sludge, lower than 20%, greatly reduces sludge drying energy consumption and ultimate disposal and utilizes cost.
The object of the invention is to be achieved through the following technical solutions:
A kind of two-part drying and other treatment sludge method, comprises the following steps:
A, to be transported in mixing machine respectively by the deodorizing broken wall mixture configured to mix with mud, obtain alkaline sludge, wherein the addition of deodorizing broken wall mixture is 5 ~ 30% of sludge quality;
B, alkaline sludge is sent into one section of dryer, the waste gas passing into cement kiln tail 350 ~ 450 DEG C carries out one section of mummification, and air quantity is 12000m
3/ h ~ 120000m
3/ h, the rotating speed of one section of dryer is 15 ~ 30r/min, and drying time is 50 ~ 100 minutes, and the VOCs material that mummification produces enters qualified discharge after microwave+plasma oxidation device processes;
C, mud after one section of mummification is sent into two sections of dryers, pass into grate-cooler low-temperature zone 250 ~ 350 DEG C of waste gas and carry out two sections of mummification respectively, air quantity is 10000m
3/ h ~ 100000m
3/ h, the rotating speed of two sections of dryers is 5 ~ 10r/min, and drying time is 30 ~ 60 minutes, and the VOCs material that mummification produces enters qualified discharge after microwave+plasma oxidation process;
D, the mud after two sections of mummification is delivered to warehouse of sludge, under seasoning state, mummification is to water ratio less than 20%;
E, water ratio be less than 20% dewatered sludge be admitted to cement kiln decomposing furnace burning disposal by lift.
Further, the broken wall of deodorizing described in steps A mixture is the mixture of reodorant and carbide slag, and wherein the addition of reodorant is 0.1% of sludge quality, and the addition of carbide slag is 10% of sludge quality.
Further, the broken wall of deodorizing described in steps A mixture is the mixture that kiln tail returns that ash and kiln hood return ash, and wherein kiln tail returns ash and kiln hood to return grey mass ratio be 1 ~ 3:7 ~ 9.
Further, the waste gas of cement kiln tail 400 DEG C is passed in step B.
Further, the waste gas of grate-cooler low-temperature zone 300 DEG C is passed in step C.
beneficial effect of the present invention:
1, be applicable to the mud of high-moisture percentage, mummification successful, and have certain stabilization effect;
2, adopt cement kiln to return ash as one of properties-correcting agent main raw material, do not change cement kiln raw meal proportioning ratio;
3, utilize cement kiln waste gas waste heat completely, do not need to consume external heat source;
4, can also stench be eliminated while sludge drying, be beneficial to mud subsequent disposal;
5, two-part mummification is adopted, not only two temperature sections are selected to avoid pyrolyzing sludge and are produced tar, and take full advantage of the air quantity of cement kiln, drying time is short, water ratio can be reduced to less than 25% from more than 80% by sludge water content within 2h, do not need to place for a long time, be conducive to the continuous running processing a large amount of mud;
6, the independent oxide treatment of VOCs of mummification generation, avoiding too much cold wind to enter cement kiln increases coal consumption.
Accompanying drawing explanation
Fig. 1 adds cement kiln to return the two-part dewatered sludge method process flow sheet of ash as the agent of deodorizing broken wall.
Embodiment
embodiment 1
Containing a large amount of cell and colloidalmaterial in mud, mud is down between 55% ~ 70% at water ratio, the flocculent substance of original dispersion is polymerized, between micelle, hole diminishes and generates filter bridge, formed one so-called " viscose glue phase region ", moisture by one by one by cell walls and colloidalmaterial " capsule " that formed wrap up, mud be viscose glue shape, is difficult to discharge the moisture in mud by mechanical presses again.Only have breakthrough mud " viscose glue phase region ", mud just can have good dispersiveness again.Sludge modification agent is applied to the pre-treatment of mud, make mud " broken wall " by chemical processes such as unslaked limes and lose adhesion, stop the formation of " viscose glue phase region ", reduce filtration resistance, improve the dehydration rate of mechanism filter-pressing, mud decrement is subtracted the while of appearance and greatly reduces dehydration energy, be conducive to ultimate disposal and the utilization of mud.Cement kiln utilizes the grate-cooler waste heat of high temperature section to generate electricity more, but few to the report of kiln tail gas waste heat and low-temperature zone grate-cooler UTILIZATION OF VESIDUAL HEAT IN, therefore, cement kiln tail tail gas and low-temperature zone grate-cooler waste heat can be made full use of, reduce city Greenhouse effect.
Utilize waste heat of cement kiln tail gas and grate-cooler using waste heat from tail gas drying sludge system, comprise odor removal, mixing device, e Foerderanlage, blower fan, one section of drying unit, two sections of drying units, tailgas oxidizer, motor, automatic control and on-Line Monitor Device.Automatic monitoring and automatically control comprise the fully automatic operation process of charging, conveying, discharging, and judge terminal by on-line monitoring, without the need to manually, use easy to operate, achieve low speed mummification, greatly reduce energy consumption, reduce equipment attrition simultaneously.This system adopts gordian technique-two section anhydration system, namely in the system of the mummification of two series connection, adopts the waste heat of cement kiln tail gas and the waste heat of grate-cooler low-temperature zone respectively, achieves effective utilization of used heat.
The technical scheme of the present embodiment is:
The present invention carries out waste heat mummification by following steps to mud:
A, to be transported in mixing machine respectively by the deodorizing broken wall mixture configured to mix with mud, obtain alkaline sludge, wherein the addition of deodorizing broken wall mixture is 5 ~ 30% of sludge quality;
B, alkaline sludge is sent into one section of dryer, the waste gas passing into cement kiln tail 350 ~ 450 DEG C carries out one section of mummification, and air quantity is 12000m
3/ h ~ 120000m
3/ h, the rotating speed of one section of dryer is 15 ~ 30r/min, and drying time is 50 ~ 100 minutes, and the VOCs material that mummification produces enters qualified discharge after microwave+plasma oxidation device processes;
C, mud after one section of mummification is sent into two sections of dryers, pass into grate-cooler low-temperature zone 250 ~ 350 DEG C of waste gas and carry out two sections of mummification respectively, air quantity is 10000m
3/ h ~ 100000m
3/ h, the rotating speed of two sections of dryers is 5 ~ 10r/min, and drying time is 30 ~ 60 minutes, and the VOCs material that mummification produces enters qualified discharge after microwave+plasma oxidation process;
D, the mud after two sections of mummification is delivered to warehouse of sludge, under seasoning state, mummification is to water ratio less than 20%;
E, water ratio be less than 20% dewatered sludge be admitted to cement kiln decomposing furnace burning disposal by lift.
embodiment 2
The basis of embodiment 1 is improved further.Concrete technology flow process is see Fig. 1.
A, adopt and stir cutter and kiln hood and kiln tail are returned ash and collect kiln hood respectively and return ash silo and kiln tail returns in ash silo, be then mixed with mixture by weighing balance, wherein: it is 1 ~ 3:7 ~ 9 that kiln tail returns the allocation ratio that ash and kiln hood return ash.Employing is stirred cutter and the mud that time grey mixture configured and water ratio are 80 ~ 86% is transported to colter fly cutter mixing machine respectively, obtains alkaline sludge.Wherein: the adding proportion of returning grey mixture is 5 ~ 30%.The main component that kiln tail returns ash is Wingdale, clay and ferriferous raw material, and the main component that kiln hood returns ash is tricalcium silicate, Dicalcium Phosphate (Feed Grade), tricalcium aluminate and tetracalcium aluminoferrite.Due to containing more basic oxide, therefore, this step achieves the double effects of deodorizing and broken wall, and the mud viscosity step-down after process, water ratio are reduced to 70 ~ 75% and odorless from 80 ~ 86%; Return grey the ingredients of a mixture more complicated, many unknown impurities are also had except some known alkaline matters, various composition comprehensively forms back grey mixture and demonstrate good effect in deodorizing broken wall process, and effect is better than the interpolation of single reodorant or broken wall agent.
B, alkaline sludge is transported to one section of dryer by stirring cutter, inner block is adopted to have the high temperature resistant airduct of refractory materials that the waste gas of cement kiln tail 400 DEG C is sent into one section of dryer, one section of dryer is drum-type, and inside has, and the twin shaft of stirring stirs cutter, outer setting has rapping to equip, carry out one section of mummification.The processing parameter of one section of mummification is: the waste gas adopting cement kiln tail 400 DEG C, air quantity is 12000m
3/ h ~ 120000m
3/ h, the rotating speed of rotating drum type drying machine is 15 ~ 30r/min, and after one section of mummification, moisture percentage in sewage sludge is reduced to 50 ~ 55% from 70 ~ 75%; The VOCs material that mummification produces enters qualified discharge after microwave+plasma oxidation device processes;
After C, one section of mummification, mud enters two sections of dryers by stirring cutter, adopts inner block to have the high temperature resistant airduct of refractory materials that grate-cooler low-temperature zone 300 DEG C of waste gas are introduced two sections of dryers, carries out two sections of mummification.Two sections of dryers are also drum-type, and inside has, and the twin shaft of stirring stirs cutter, outer setting has rapping to equip.The processing parameter of two sections of mummification is: adopt cement-kiln grate-cooler low-temperature zone 300 DEG C of waste gas, air quantity is 10000m
3/ h ~ 100000m
3/ h, the rotating speed of rotating drum type drying machine is 5 ~ 10r/min, and after two sections of mummification, moisture percentage in sewage sludge is reduced to 20 ~ 25% from 50 ~ 55%; The VOCs material that mummification produces enters qualified discharge after microwave+plasma oxidation process process;
These two temperature sections are selected to avoid pyrolyzing sludge and are produced tar, and taking full advantage of the air quantity of cement kiln, drying time is short, and water ratio can be reduced to less than 25% from more than 80% by sludge water content within 2h, do not need to place for a long time, be conducive to the continuous running processing a large amount of mud.
D, by after two sections of mummification, water ratio be 20 ~ 25% mud deliver to warehouse of sludge by drag conveyer, under seasoning state, mud by mummification to water ratio less than 20%;
E, water ratio be less than 20% dewatered sludge be admitted to cement kiln decomposing furnace burning disposal by lift.
embodiment 3
The basis of embodiment 2 is optimized.
Water ratio is Beijing Sewage Plant dewatered sludge 100t/d of 86%, in cement mill, Beijing, that adds 15t/d returns grey mixture, in mixture, kiln hood returns ash is 75%, it is 25% that kiln tail returns ash, fully mix in colter fly cutter mixing machine, gather the tail gas of 400 DEG C from one-level preheater, air quantity is 12000m
3/ h, after sending into the mummification of one section of 30r/min rotating drum type drying machine, moisture percentage in sewage sludge is reduced to 55% from 75%; Introduce grate-cooler low-temperature zone waste gas again, enter two sections of 15r/min rotating drum type drying machines and carry out two sections of mummification, cement-kiln grate-cooler low-temperature zone spent air temperture is 300 DEG C, and air quantity is 10000m
3/ h, after two sections of mummification, moisture percentage in sewage sludge is reduced to 25% from 55%; The VOCs material that two sections of mummification produce all enters qualified discharge after microwave+plasma oxidation process.By water ratio be 25% mud through natural air drying to moisture less than 20%, then enter decomposing furnace dispose, the cement clinker of production meets the requirement of GB GB175-2007.
embodiment 4
the basis of embodiment 2 is optimized.
Water ratio is the Hebei Shijiazhuang City Sewage Plant dewatered sludge 500t/d of 83%, in cement mill, Shijiazhuang, that adds 50t/d returns grey mixture, in mixture, kiln hood returns ash is 70%, it is 30% that kiln tail returns ash, fully mix in colter fly cutter mixing machine, gather the tail gas of 400 DEG C from one-level preheater, air quantity is 24000m
3/ h, after sending into the mummification of one section of 20r/min rotating drum type drying machine, moisture percentage in sewage sludge is reduced to 53% from 75%; Introduce grate-cooler low-temperature zone waste gas again, enter rotating drum type drying machine, carry out two sections of mummification.Cement-kiln grate-cooler low-temperature zone spent air temperture is 300 DEG C, and air quantity is 50000m
3/ h, enter two sections of 10r/min rotating drum type drying machines and carry out two sections of mummification, moisture percentage in sewage sludge is reduced to 25% from 53%; The VOCs material that two sections of mummification produce all enters qualified discharge after microwave+plasma oxidation process.By water ratio be 25% mud through natural air drying to moisture less than 20%, enter decomposing furnace dispose, the cement clinker of production meets the requirement of GB GB175-2007.
embodiment 5
the basis of embodiment 2 is optimized.
Water ratio is Beijing Sewage Plant dewatered sludge 1000t/d of 85%, in cement mill, Beijing, that adds 200t/d returns grey mixture, in mixture, kiln hood returns ash is 80%, it is 20% that kiln tail returns ash, fully mix in colter fly cutter mixing machine, gather the tail gas of 400 degree from one-level preheater, air quantity is 120000m
3/ h, after sending into the mummification of one section of 25r/min rotating drum type drying machine, moisture percentage in sewage sludge is reduced to 54% from 74%; Introduce grate-cooler low-temperature zone waste gas again, enter rotating drum type drying machine, carry out two sections of mummification.Cement-kiln grate-cooler low-temperature zone spent air temperture is 300 degree, and air quantity is 100000m
3/ h, enter two sections of 15r/min rotating drum type drying machines and carry out two sections of mummification, moisture percentage in sewage sludge is reduced to 24.5% from 54%; The VOCs material that two sections of mummification produce all enters qualified discharge after microwave+plasma oxidation process.By water ratio be 24.5% mud to connect through natural air drying to moisture less than 20%, enter decomposing furnace and dispose, the cement clinker of production meets the requirement of GB GB175-2007.
embodiment 6
Water ratio is Beijing Sewage Plant dewatered sludge 100t/d of 86%, in cement mill, Beijing, adds 10 t/d carbide slags and 100kg/d reodorant, fully mixes in colter fly cutter mixing machine, and gather the tail gas of 400 degree from one-level preheater, air quantity is 12000m
3/h, after one section of mummification, moisture percentage in sewage sludge is reduced to 53% from 75%; Introduce grate-cooler low-temperature zone waste gas again, enter rotating drum type drying machine, carry out two sections of mummification.Cement-kiln grate-cooler low-temperature zone spent air temperture is 300 degree, and air quantity is 10000m
3/ h, after two sections of mummification, moisture percentage in sewage sludge is reduced to 25% from 53%; The VOCs material that two sections of mummification produce all enters qualified discharge after microwave+plasma oxidation process.By water ratio be 25% mud through natural air drying to moisture less than 20%, enter decomposing furnace dispose, the cement clinker of production meets the requirement of GB GB175-2007.
Claims (5)
1. a two-part drying and other treatment sludge method, is characterized in that, comprises the following steps:
A, to be transported in mixing machine respectively by the deodorizing broken wall mixture configured to mix with mud, obtain alkaline sludge, wherein the addition of deodorizing broken wall mixture is 5 ~ 30% of sludge quality;
B, alkaline sludge is sent into one section of dryer, the waste gas passing into cement kiln tail 350 ~ 450 DEG C carries out one section of mummification, and air quantity is 12000m
3/ h ~ 120000m
3/ h, the rotating speed of one section of dryer is 15 ~ 30r/min, and drying time is 50 ~ 100 minutes, and the VOCs material that mummification produces enters qualified discharge after microwave+plasma oxidation device processes;
C, mud after one section of mummification is sent into two sections of dryers, pass into grate-cooler low-temperature zone 250 ~ 350 DEG C of waste gas and carry out two sections of mummification respectively, air quantity is 10000m
3/ h ~ 100000m
3/ h, the rotating speed of two sections of dryers is 5 ~ 10r/min, and drying time is 30 ~ 60 minutes, and the VOCs material that mummification produces enters qualified discharge after microwave+plasma oxidation process;
D, the mud after two sections of mummification is delivered to warehouse of sludge, under seasoning state, mummification is to water ratio less than 20%;
E, water ratio are the dewatered sludge feeding cement kiln decomposing furnace burning disposal of less than 20%.
2. drying and other treatment sludge method according to claim 1, it is characterized in that, the broken wall of deodorizing described in steps A mixture is the mixture of reodorant and carbide slag, and wherein the addition of reodorant is 0.1% of sludge quality, and the addition of carbide slag is 10% of sludge quality.
3. drying and other treatment sludge method according to claim 1, is characterized in that, the broken wall of deodorizing described in steps A mixture is the mixture that kiln tail returns that ash and kiln hood return ash, and wherein kiln tail returns ash and kiln hood to return grey mass ratio be 1 ~ 3:7 ~ 9.
4. drying and other treatment sludge method according to claim 1, is characterized in that, step B passes into the waste gas of cement kiln tail 400 DEG C.
5. drying and other treatment sludge method according to claim 1, is characterized in that, step C passes into the waste gas of grate-cooler low-temperature zone 300 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007283A (en) * | 2016-07-11 | 2016-10-12 | 许祚员 | Zineb polluted sludge treatment agent and preparing method thereof |
| CN106517719A (en) * | 2015-09-14 | 2017-03-22 | 黄浩 | Intelligent drying treatment system for rapid dehydration and deodorization of sludge (or excrement or ooze) |
| CN111302577A (en) * | 2019-12-13 | 2020-06-19 | 泰州明锋资源再生科技有限公司 | Plasma treatment process for pickling sludge |
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