CN104743765B - A kind of two-part drying and other treatment sludge method - Google Patents
A kind of two-part drying and other treatment sludge method Download PDFInfo
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- 239000010802 sludge Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000001035 drying Methods 0.000 title claims abstract description 35
- 239000004568 cement Substances 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 238000006396 nitration reaction Methods 0.000 claims abstract description 28
- 239000002912 waste gas Substances 0.000 claims abstract description 21
- 230000001413 cellular effect Effects 0.000 claims abstract description 16
- 238000004332 deodorization Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 13
- 230000003647 oxidation Effects 0.000 claims description 13
- 238000007254 oxidation reaction Methods 0.000 claims description 13
- 239000012855 volatile organic compound Substances 0.000 claims description 13
- 239000002918 waste heat Substances 0.000 abstract description 10
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010801 sewage sludge Substances 0.000 description 12
- 239000010865 sewage Substances 0.000 description 11
- 239000007789 gas Substances 0.000 description 10
- 238000003756 stirring Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 5
- 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
- 238000005516 engineering process Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change 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
- 238000002156 mixing 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
- 235000019738 Limestone 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
- 230000008901 benefit Effects 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
- 239000000292 calcium oxide Substances 0.000 description 1
- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 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
- 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
- 238000001816 cooling 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
- 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
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 201000006549 dyspepsia Diseases 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 150000002927 oxygen compounds Chemical class 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 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 present invention is a kind of method of two-part drying and other treatment mud, the deodorization breaking cellular wall mixture adding 5% ~ 30% in the mud of more than 80% high-moisture obtains alkaline sludge, the waste gas that alkaline sludge one section of dehydrator of feeding is passed through cement kiln tail 350 ~ 450 DEG C simultaneously is carried out one section of mummification, mud feeding two-stage nitration dehydrator after one section of mummification is passed through 250 ~ 350 DEG C of waste gas of grate-cooler low-temperature zone and carries out two-stage nitration mummification respectively, mud after two sections of mummification is delivered to warehouse of sludge, and under natural drying state, mummification sends into cement kiln dore furnace burning disposal to moisture content less than 20%.The present invention fully utilized cement kiln waste gas waste heat, is not required to consume external heat source；Stench, beneficially mud subsequent treatment can also be eliminated while sludge drying.
Description
Technical field
The present invention relates to solid waste recycling field, utilize cement kiln in particular for relating to sludge in-situ deodorizer
The technology of residual heat to dry sludge, is specially a kind of two-part drying and other treatment sludge method.
Background technology
Along with developing 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, mostlys come from the beginning of sewage treatment plants
Secondary and secondary sedimentation tank, is the side-product that the volume that city domestic sewage produces when processing is maximum, be easiest to produce secondary pollution.
The generation amount of mud is big, and processing 1000 tons of city domestic sewages and about producing 1 ton of moisture content is the mud of 80%.Sewage treatment plant
All in construction cost, the part for Treatment of Sludge can reach 70%.Environment is entered without the appropriate mud disposed that processes
After, bring secondary pollution directly to water body and air, not only reduce the effective processing capacity of sewage disposal system, and to life
The activity of state environment and the mankind constitutes serious threat.
The moisture content of dewatered sludge is high, typically 75～85%, if dewatered sludge being directly used in above-mentioned process dispose work
, there is a lot of problem in skill: 1) wet mud moisture content height causes sludge calorific value low, and value reduces；2) characteristic of mud itself makes
It is difficult to mummification, power consumption height, adds and utilizes cost；3) mud stickiness is big, and easily bond wall, blocking and etching apparatus；4) wet
Mud state labile easily produces in storage and produces dust and volatile fuel in biogas, and production process, brings
The potential safety hazard such as spontaneous combustion and blast.
Therefore, the moisture content height of dewatered sludge is that it processes the obstacle disposed further, and this just requires that mud must be carried out
Mummification reduces moisture content, to meet the requirement of minimizing and resource.Can not ignore in the Treatment of Sludge stage simultaneously another
Problem is malodor problem, and the stench of mud brings serious impact to environment, if not solving stench, the mud of mummification also is difficult to
It is utilized.
Because the These characteristics of mud, exist during processing mud and recycling a lot of difficulty and to equipment requirements,
Power consumption requires the highest, and in general sewage treatment plant, the process of mud to 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 deodorization, solves mud breaking cellular wall and stink simultaneously,
The method of indigestion extra power dewatered sludge as far as possible, the method processes for sludge drying, and gained moisture percentage in sewage sludge is less than
20%, it is substantially reduced sludge drying energy consumption and final disposal and utilizes cost.
It is an object of the invention to be achieved through the following technical solutions:
A kind of two-part drying and other treatment sludge method, comprises the following steps:
A, it is respectively delivered in mixer mix with mud by the deodorization breaking cellular wall mixture configured, obtains alkaline sludge,
Wherein the addition of deodorization breaking cellular wall mixture is the 5 ~ 30% of sludge quality；
B, by alkaline sludge send into one section of dehydrator, the waste gas being passed through cement kiln tail 350 ~ 450 DEG C carries out one section of mummification,
Air quantity is 12000m3/h ~120000m3/ h, the rotating speed of one section of dehydrator is 15 ~ 30r/min, and drying time is 50 ~ 100 minutes,
The VOCs material that mummification produces enters qualified discharge after microwave+plasma oxidation equipment processes；
C, by after one section of mummification mud send into two-stage nitration dehydrator, be passed through 250 ~ 350 DEG C of waste gas of grate-cooler low-temperature zone and enter respectively
Row two-stage nitration mummification, air quantity is 10000m3/h ~100000m3/ h, the rotating speed of two-stage nitration dehydrator is 5 ~ 10r/min, and drying time is
30 ~ 60 minutes, the VOCs material that mummification produces entered qualified discharge after microwave+plasma oxidation processes；
D, the mud after two sections of mummification being delivered to warehouse of sludge, under natural drying state, mummification is to moisture content
Less than 20%；
E, moisture content be less than 20% dewatered sludge be admitted to cement kiln dore furnace burning disposal by elevator.
Further, the mixture of deodorization breaking cellular wall described in step A is the mixture of deodorizer and carbide slag, wherein deodorizer
Addition is sludge quality 0.1%, the addition of carbide slag is the 10% of sludge quality.
Further, the mixture of deodorization breaking cellular wall described in step A is that kiln tail returns ash and kiln hood returns grey mixture, wherein kiln
Tail returns ash and kiln hood to return the mass ratio of ash be 1 ~ 3:7 ~ 9.
Further, step B is passed through the waste gas of cement kiln tail 400 DEG C.
Further, step C is passed through the waste gas of grate-cooler low-temperature zone 300 DEG C.
Beneficial effects of the present invention:
1, being applicable to the mud of high-moisture percentage, mummification effect is obvious, and has certain stabilization effect；
2, use cement kiln to return grey as one of modifying agent primary raw material, do not change cement kiln raw meal proportioning ratio；
3, fully utilized cement kiln waste gas waste heat, is not required to consume external heat source；
4, stench, beneficially mud subsequent treatment can also be eliminated while sludge drying；
5, using two-part mummification, not only two temperature sections select to avoid pyrolyzing sludge and produce tar, and fully sharp
With the air quantity of cement kiln, drying time is short, and moisture content can be reduced to less than 25% from more than 80% within 2h by sludge water content,
It is not required to place for a long time, is conducive to processing continuously running of a large amount of mud；
6, the independent oxidation processes of VOCs that mummification produces, it is to avoid too much cold wind enters cement kiln increases coal consumption.
Accompanying drawing explanation
Fig. 1 is to add cement kiln to return the ash two-part dewatered sludge method process chart as deodorization breaking cellular wall agent.
Detailed description of the invention
Embodiment 1
Containing a large amount of cells and colloidal substance in mud, mud is down between 55% ~ 70% at moisture content, original scattered wadding
Shape material is polymerized, and between micelle, hole diminishes and generates filter bridge, forms one so-called " viscose glue phase region ", and moisture is by one by one
" capsule " parcel formed by cell wall and colloidal substance, mud is viscose glue shape, is difficult to discharge mud by mechanical presses again
In moisture.Only breaking through mud " viscose glue phase region ", mud just can have preferable dispersibility again.Sludge modification agent is applied to
The pretreatment of mud, makes mud " breaking cellular wall " by chemical methodes such as quick lime and loses adhesion, stops the formation of " viscose glue phase region ",
Reduce filtration resistance, improve the dehydration rate of mechanism filter-pressing, make mud decrement volume reduction be substantially reduced dehydration energy, beneficially mud simultaneously
Final disposal and utilization.Cement kiln utilizes the grate-cooler waste heat of high temperature section to generate electricity more, but to kiln tail gas waste heat and low temperature
The report of section grate-cooler UTILIZATION OF VESIDUAL HEAT IN is few, therefore, can cement kiln tail tail gas and low-temperature zone grate-cooler waste heat be made full use of,
Reduce city greenhouse effect.
Utilize waste heat of cement kiln tail gas and grate-cooler waste heat from tail gas drying sludge system, including odor removal, mixing arrangement,
Conveyer device, blower fan, one section of drying unit, two-stage nitration drying unit, tailgas oxidizer, motor, automatic control and on-Line Monitor Device.
Automatically monitor and automatically control and include charging, conveying, the fully automatic operation process of discharging, and judge terminal by on-line monitoring,
Without manually, use easy to operate, it is achieved that low speed mummification, greatly reduce energy consumption, reduce equipment attrition simultaneously.This system uses
Two sections of anhydration systems of key technology, i.e. two series connection mummification system in, be respectively adopted cement kiln tail gas waste heat and
The waste heat of grate-cooler low-temperature zone, it is achieved that 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, it is respectively delivered in mixer mix with mud by the deodorization breaking cellular wall mixture configured, obtains alkaline sludge,
Wherein the addition of deodorization breaking cellular wall mixture is the 5 ~ 30% of sludge quality；
B, by alkaline sludge send into one section of dehydrator, the waste gas being passed through cement kiln tail 350 ~ 450 DEG C carries out one section of mummification,
Air quantity is 12000m3/h ~120000m3/ h, the rotating speed of one section of dehydrator is 15 ~ 30r/min, and drying time is 50 ~ 100 minutes,
The VOCs material that mummification produces enters qualified discharge after microwave+plasma oxidation equipment processes；
C, by after one section of mummification mud send into two-stage nitration dehydrator, be passed through 250 ~ 350 DEG C of waste gas of grate-cooler low-temperature zone and enter respectively
Row two-stage nitration mummification, air quantity is 10000m3/h ~100000m3/ h, the rotating speed of two-stage nitration dehydrator is 5 ~ 10r/min, and drying time is
30 ~ 60 minutes, the VOCs material that mummification produces entered qualified discharge after microwave+plasma oxidation processes；
D, the mud after two sections of mummification being delivered to warehouse of sludge, under natural drying state, mummification is to moisture content
Less than 20%；
E, moisture content be less than 20% dewatered sludge be admitted to cement kiln dore furnace burning disposal by elevator.
Embodiment 2
Improve further on the basis of embodiment 1.Concrete technology flow process sees Fig. 1.
A, use stirring knife that kiln hood and kiln tail return ash to collect kiln hood respectively and return ash silo and kiln tail returns in ash silo, then pass through
Weighing balance is configured to mixture, wherein: kiln tail returns ash and kiln hood to return the allocation ratio of ash be 1 ~ 3:7 ~ 9.Stirring knife is used to configure
The good ash mixture that returns is respectively delivered to colter fly cutter mixer with the mud that moisture content is 80 ~ 86%, obtains alkaline sludge.Its
In: the adding proportion returning ash mixture is 5 ~ 30%.It is limestone, clay and ferriferous raw material that kiln tail returns the main component of ash, kiln hood
The main component returning ash is for tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetra calcium aluminoferrite.Due to containing more alkaline oxygen
Compound, therefore, this step achieves the double effects of deodorization and breaking cellular wall, mud viscosity step-down after process, moisture content from 80 ~
86% is reduced to 70 ~ 75% and odorless；Return ash the ingredients of a mixture more complicated, in addition to more known alkaline matters also
There are many unknown impurities, various compositions comprehensively to form back ash mixture during deodorization breaking cellular wall, demonstrate good effect, effect
Fruit is better than single deodorizer or the interpolation of breaking cellular wall agent.
B, alkaline sludge is transported to one section of dehydrator by stirring knife, uses the internal high temperature resistant airduct built and have refractory material
The waste gas of cement kiln tail 400 DEG C is sent into one section of dehydrator, and one section of dehydrator is drum-type, and there is the twin shaft of stirring inside
Stirring knife, outside are provided with rapping equipment, carry out one section of mummification.The technological parameter of one section of mummification is: use cement kiln tail 400 DEG C
Waste gas, air quantity is 12000m3/h ~120000m3/ h, the rotating speed of rotating drum type drying machine is 15 ~ 30r/min, through one section of mummification
After, moisture percentage in sewage sludge is reduced to 50 ~ 55% from 70 ~ 75%；The VOCs material that mummification produces enters microwave+plasma oxidation equipment
Qualified discharge after process；
After C, one section of mummification, mud enters two-stage nitration dehydrator by stirring knife, uses the internal high temperature resistant wind built and have refractory material
300 DEG C of waste gas of grate-cooler low-temperature zone are introduced two-stage nitration dehydrator by pipe, carry out two-stage nitration mummification.Two-stage nitration dehydrator is also drum-type, and
And inside has the twin shaft stirring knife of stirring, outside to be provided with rapping equipment.The technological parameter of two-stage nitration mummification is: use cement kiln cooling
300 DEG C of waste gas of machine low-temperature zone, air quantity is 10000m3/h ~100000m3/ h, the rotating speed of rotating drum type drying machine is 5 ~ 10r/min, warp
After crossing two-stage nitration mummification, moisture percentage in sewage sludge is reduced to 20 ~ 25% from 50 ~ 55%；The VOCs material that mummification produces enters microwave+plasma
Qualified discharge after the process of body oxidation processes；
The two temperature section selects to avoid pyrolyzing sludge and produces tar, and takes full advantage of the air quantity of cement kiln, dry
The change time is short, and moisture content can be reduced to less than 25% from more than 80% within 2h by sludge water content, is not required to place for a long time, has
It is beneficial to process continuously running of a large amount of mud.
D, the mud that after two sections of mummification, moisture content are 20 ~ 25% is delivered to warehouse of sludge by chain scraper conveyor,
Under natural drying state, mud is dried to moisture content less than 20%；
E, moisture content be less than 20% dewatered sludge be admitted to cement kiln dore furnace burning disposal by elevator.
Embodiment 3
It is optimized on the basis of embodiment 2.
Moisture content is Beijing Sewage Plant dewatered sludge 100t/d of 86%, in cement plant, Beijing, adds 15t/d
Return ash mixture, in mixture, kiln hood returns ash is 75%, and it is 25% that kiln tail returns ash, is sufficiently mixed in colter fly cutter mixer,
Gather the tail gas of 400 DEG C from one-level preheater, air quantity is 12000m3/ h, sends into one section of 30r/min rotating drum type drying machine mummification
After, moisture percentage in sewage sludge is reduced to 55% from 75%；It is re-introduced into grate-cooler low-temperature zone waste gas, enters two-stage nitration 15r/min drum-type and dry
Machine carries out two-stage nitration mummification, and cement-kiln grate-cooler low-temperature zone EGT is 300 DEG C, and air quantity is 10000m3/ h, through two-stage nitration mummification
After, moisture percentage in sewage sludge is reduced to 25% from 55%；The VOCs material of two sections of mummification generations all enters microwave+plasma oxidation and processes
Rear qualified discharge.By mud that moisture content is 25% through natural air drying to moisture less than 20%, enter back into dore furnace and dispose, produce
Clinker meet the requirement of GB GB175-2007.
Embodiment 4
It is optimized on the basis of embodiment 2.
Moisture content is the Hebei Shijiazhuang City Sewage Plant dewatered sludge 500t/d of 83%, in cement plant, Shijiazhuang, adds
Add 50t/d returns ash mixture, and in mixture, kiln hood returns ash is 70%, and it is 30% that kiln tail returns ash, fills in colter fly cutter mixer
Dividing mixing, gather the tail gas of 400 DEG C from one-level preheater, air quantity is 24000m3/ h, sends into one section of 20r/min drum-type and dries
After machine mummification, moisture percentage in sewage sludge is reduced to 53% from 75%；It is re-introduced into grate-cooler low-temperature zone waste gas, enters rotating drum type drying machine, enter
Row two-stage nitration mummification.Cement-kiln grate-cooler low-temperature zone EGT is 300 DEG C, and air quantity is 50000m3/ h, enters two-stage nitration 10r/min
Rotating drum type drying machine carries out two-stage nitration mummification, and moisture percentage in sewage sludge is reduced to 25% from 53%；The VOCs material of two sections of mummification generations all enters
Enter qualified discharge after microwave+plasma oxidation processes.By mud that moisture content is 25% through natural air drying to moisture 20% with
Under, entering dore furnace and dispose, the clinker of production meets the requirement of GB GB175-2007.
Embodiment 5
It is optimized on the basis of embodiment 2.
Moisture content is Beijing Sewage Plant dewatered sludge 1000t/d of 85%, in cement plant, Beijing, adds 200t/d
Return ash mixture, in mixture, kiln hood returns ash is 80%, and it is 20% that kiln tail returns ash, is sufficiently mixed in colter fly cutter mixer,
Gather the tail gas of 400 degree from one-level preheater, air quantity is 120000m3/ h, sends into one section of 25r/min rotating drum type drying machine mummification
After, moisture percentage in sewage sludge is reduced to 54% from 74%；It is re-introduced into grate-cooler low-temperature zone waste gas, enters rotating drum type drying machine, carry out two-stage nitration
Mummification.Cement-kiln grate-cooler low-temperature zone EGT is 300 degree, and air quantity is 100000m3/ h, enters two-stage nitration 15r/min drum-type
Dehydrator carries out two-stage nitration mummification, and moisture percentage in sewage sludge is reduced to 24.5% from 54%；The VOCs material of two sections of mummification generations all enters micro-
Qualified discharge after ripple+plasma oxidation process.The mud that moisture content is 24.5% is connect through natural air drying to moisture 20% with
Under, entering dore furnace and dispose, the clinker of production meets the requirement of GB GB175-2007.
Embodiment 6
Moisture content is Beijing Sewage Plant dewatered sludge 100t/d of 86%, in cement plant, Beijing, adds 10 t/d
Carbide slag and 100kg/d deodorizer, be sufficiently mixed in colter fly cutter mixer, gathers the tail gas of 400 degree from one-level preheater,
Air quantity is 12000m3/H, after one section of mummification, moisture percentage in sewage sludge is reduced to 53% from 75%；It is re-introduced into grate-cooler low-temperature zone to give up
Gas, enters rotating drum type drying machine, carries out two-stage nitration mummification.Cement-kiln grate-cooler low-temperature zone EGT is 300 degree, and air quantity is
10000m3/ h, after two-stage nitration mummification, moisture percentage in sewage sludge is reduced to 25% from 53%；The VOCs material of two sections of mummification generations all enters
Enter qualified discharge after microwave+plasma oxidation processes.By mud that moisture content is 25% through natural air drying to moisture 20% with
Under, entering dore furnace and dispose, the clinker of production meets the requirement of GB GB175-2007.
Claims (3)
1. a two-part drying and other treatment sludge method, it is characterised in that comprise the following steps:
A, it is respectively delivered in mixer mix with mud by the deodorization breaking cellular wall mixture configured, obtains alkaline sludge, wherein
Addition is sludge quality the 5 ~ 30% of deodorization breaking cellular wall mixture；
B, by alkaline sludge send into one section of dehydrator, the waste gas being passed through cement kiln tail 350 ~ 450 DEG C carries out one section of mummification, air quantity
For 12000m3/h ~120000m3/ h, the rotating speed of one section of dehydrator is 15 ~ 30r/min, and drying time is 50 ~ 100 minutes, mummification
The VOCs material produced enters qualified discharge after microwave+plasma oxidation equipment processes；
C, by after one section of mummification mud send into two-stage nitration dehydrator, be passed through 250 ~ 350 DEG C of waste gas of grate-cooler low-temperature zone and carry out two respectively
Duan Ganhua, air quantity is 10000m3/h ~100000m3/ h, the rotating speed of two-stage nitration dehydrator is 5 ~ 10r/min, and drying time is 30 ~ 60
Minute, the VOCs material that mummification produces enters qualified discharge after microwave+plasma oxidation processes；
D, the mud after two sections of mummification is delivered to warehouse of sludge, under natural drying state mummification to moisture content 20% with
Under；
E, moisture content are the dewatered sludge feeding cement kiln dore furnace burning disposal of less than 20%；
The mixture of deodorization breaking cellular wall described in step A is that kiln tail returns ash and kiln hood returns grey mixture, and wherein kiln tail returns ash and kiln hood
The mass ratio returning ash is 1 ~ 3:7 ~ 9.
Drying and other treatment sludge method the most according to claim 1, it is characterised in that step B is passed through cement kiln tail 400 DEG C
Waste gas.
Drying and other treatment sludge method the most according to claim 1, it is characterised in that step C is passed through grate-cooler low-temperature zone 300
DEG C waste gas.
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| CN106007283A (en) * | 2016-07-11 | 2016-10-12 | 许祚员 | Zineb polluted sludge treatment agent and preparing method thereof |
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| CN100336752C (en) * | 2006-05-30 | 2007-09-12 | 浙江大学 | Circulation-type energy-saving sludge drying method |
| CN201240987Y (en) * | 2008-05-09 | 2009-05-20 | 杭州新源环境工程有限公司 | Sludge anhydration system of tail gas waste heat recovery recycle |
| CA2656390A1 (en) * | 2009-02-27 | 2010-08-27 | Rae E. Wallin | Method for treating bio-organic and wastewater sludges |
| JP5317283B2 (en) * | 2009-09-29 | 2013-10-16 | 第一高周波工業株式会社 | Treatment method of organic sludge |
| JP2013103865A (en) * | 2011-11-16 | 2013-05-30 | Ube Industries Ltd | Method of manufacturing cement paste |
| CN102814103B (en) * | 2012-08-27 | 2013-12-18 | 浙江大学 | Four-stage sludge drying tail gas treatment system |
| CN103011546B (en) * | 2012-12-05 | 2016-12-21 | 上海巴安水务股份有限公司 | A kind of two-stage sludge mummification and energy-recuperation system and drying process thereof |
| CN103896505B (en) * | 2014-03-25 | 2015-07-29 | 同济大学 | A kind of method of feeding mode regulation and control of cement kiln synergic processing lime mummification municipal sludge |
| CN104496150A (en) * | 2014-12-11 | 2015-04-08 | 北京建筑材料科学研究总院有限公司 | Sludge raw material drying method used in cement kiln grate cooler |
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2015
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