CN105502885A - Two-section backflow type sludge lime stable drying system - Google Patents
Two-section backflow type sludge lime stable drying system Download PDFInfo
- Publication number
- CN105502885A CN105502885A CN201610025236.XA CN201610025236A CN105502885A CN 105502885 A CN105502885 A CN 105502885A CN 201610025236 A CN201610025236 A CN 201610025236A CN 105502885 A CN105502885 A CN 105502885A
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- China
- Prior art keywords
- stage reactor
- return
- lime
- sections
- mud
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Abstract
The invention discloses a two-section backflow type sludge lime stable drying system. The stable drying system comprises a raw material adding system, a reacting system, a backflow system, a discharge system and a waste gas processing system, and is characterized in that the raw material adding system is connected to the reacting system, the reacting system comprises a first-section reactor and a second-section reactor, the outlet of the first-section reactor is connected with the second-section reactor, the material output port of the bottom of the second-segment reactor is communicated with the inlet of the first-section reactor through the backflow system, the second-section reactor is connected with the waste gas processing system through a pipeline, and the material output port of the bottom of the second-section reactor is connected with the discharge system. According to the stable drying system, heat contained in a discharge material is used for heating fed sludge, the conveying performance and fluidity of sludge are improved, and the addition amount of slime is decreased.
Description
Technical field
The invention belongs to field of sludge treatment, especially a kind of two sections of return-flow type mud lime stabilization anhydration systems.
Background technology
Along with the raising of wastewater treatment rate, mud generation increases greatly, and specific resistance to filtration problem day by day highlights, and becomes the difficult problem that water treatment field faces.In order to realize the minimizing of specific resistance to filtration, stabilization, innoxious and resource utilization, domestic and international specific resistance to filtration technique is updated perfect.In numerous specific resistance to filtration schemes, the method adopting lime treatment to reduce moisture percentage in sewage sludge has stronger practicality, its construction period short, less investment, occupation of land economizes, easy and simple to handle, running cost is relatively low, and can reach certain decrement, sterilizing, deodorizing effect, and comes into one's own.
The lime-crushed stone pile of current existing mud lime stabilization anhydration system is up to the 20%-30% of sludge quantity, and lime is as a kind of Mineral resources, has finiteness, simultaneously lime expense in cost proportion up to 70%-95%.Therefore by improving technique and equipment, reduce Lime-Injecting amount, lime stabilization mummification is had important practical significance in the popularization of China and use.
Summary of the invention
The object of the invention is to propose a kind of two sections of return-flow type mud lime stabilization anhydration systems, these system lime materials are economized, and running cost is low, rationally distributed, is suitable for the mud that different water cut requires with difference final outlet.
Object of the present invention carrys out specific implementation by the following technical programs:
A kind of two sections of return-flow type mud lime stabilization anhydration systems, comprise raw material add-on system, reactive system, return-flow system, discharge system and flare system, described raw material add-on system is connected to described reactive system, described reactive system comprises first stage reactor and second stage reactor, the outlet of described first stage reactor is connected with described second stage reactor, the bottoms material delivery port of described second stage reactor is communicated with by the entrance of described return-flow system with described first stage reactor, described second stage reactor is connected with described flare system by pipeline, the bottoms material delivery port of described second stage reactor is also connected with described discharge system.
Preferably, described return-flow system is backflow spiral metering conveyor.
Preferably, described discharge system comprises discharging spiral conveyor and stockyard hopper, and described discharging spiral conveyor is communicated with the bottoms material delivery port of described second stage reactor, and the outlet of described discharging spiral conveyor is positioned at the top of described stockyard hopper.
Preferably, the bottoms material delivery port of described second stage reactor is provided with feeding-distribution device, so that corresponding material is flowed to return-flow system and discharge system respectively.
Preferably, described raw material add-on system comprises lime bin, lime spiral metering conveyor, mud hopper and mud spiral metering conveyor, and described mud hopper is communicated with the entrance of described first stage reactor by described mud spiral metering conveyor; Described lime bin is communicated with the entrance of described first stage reactor by described lime spiral metering conveyor; Described first stage reactor is also provided with unclassified stores and adds mouth.
Preferably, described first stage reactor comprises the quick high shear mixer being positioned at bottom and the first agitator being positioned at middle part.
Preferably, described flare system comprises wet purification tower and centrifugal blower, and described centrifugal blower is arranged on the pipeline of described wet purification tower outlet.
A kind of two sections of return-flow type mud lime stabilization drying process, comprising:
Step (10), in first stage reactor, first the mode of rapid stirring is passed through by mixing of materials, bulk mixture is cut into fritter by the mode then stirred by THE ADIABATIC SHEAR IN, and make mud and the raw reaction of the abundant hybrid concurrency of lime, the water ratio of mixture reduces;
Step (20), the material stirring and shear through first stage reactor are sent in second stage reactor, by the low rate mixing of second stage reactor, rotating speed is 10 revs/min, makes the moisture in mixture be reacted the heat of vaporization of generation, and then water ratio is reduced;
Step (30), by return-flow system, the part hot mixture in second stage reactor is back in first stage reactor;
Step (40), the desciccate of step (20) is expelled to discharge system;
Step (50), the waste gas of high humidity high dust concentration step (20) produced send into flare system;
Step (30), (40), (50) can synchronously be carried out.
In described step (10), first the mode of rapid stirring is passed through by mixing of materials, bulk mixture is cut into fritter by the mode then stirred by THE ADIABATIC SHEAR IN, be specially: first pass through the mode of rapid stirring by mixing of materials, rotating speed is 40-60 rev/min, bulk mixture is cut into fritter by the mode then stirred by THE ADIABATIC SHEAR IN, and rotating speed is 1200-1600 rev/min.
In described step (30), described part hot mixture, is specially: temperature range is the mixture of 50-60 DEG C.
Compared with prior art, the present invention has following remarkable advantage:
(1) two sections of return-flow type mud lime stabilization anhydration systems proposed by the invention utilize the heat heating feed sludge contained by discharging thing, have both improved transporting and the mobility of mud, and have again saved the energy;
(2) two sections of return-flow type mud lime stabilization anhydration systems proposed by the invention are by the rapid stirring of first stage reactor, mud and lime are fully mixed, ensure enough residence time by the low rate mixing of second stage reactor, make to react the heat to produce by the moisture in mud as far as possible multi-band walk.While moisture percentage in sewage sludge significantly reduces, decrease the addition of lime.
(3) second stage reactor of the present invention stirs mud lime mixture by means of only the agitator on turning axle, and first stage reactor also shears mud lime mixture by the quick high shear mixer be arranged on reactor, and two reactor adopts different agitators, make discharging more even.
(4) what the one-part form reactor in two sections of return-flow type mud lime stabilization anhydration systems proposed by the invention is reserved with unclassified stores adds mouth, can according to the purposes of final product, suitably add unclassified stores, as flyash, acid etc., thus make this system can adapt to the requirement of different water cut and different treatment approach.
Accompanying drawing explanation
According to drawings and embodiments the present invention is described in further detail below.
Fig. 1 is the structure iron of a kind of two sections of return-flow type mud lime stabilization anhydration systems provided by the invention.
Wherein, 1 mud hopper; 2 mud spiral metering conveyors; 3 lime bins; 4 lime spiral metering conveyors; 5 first stage reactors; 5-1 first agitator; The quick high shear mixer of 5-2; 5-3 unclassified stores adds mouth; 6 second stage reactors; 6-1 second agitator; 7 discharging spiral conveyor; 8 backflow spiral metering conveyors; 9 stockyard hoppers; 10 wet purification towers; 11 centrifugal blowers.
Embodiment
As shown in Figure 1, Fig. 1 is a kind of two sections of return-flow type mud lime stabilization anhydration systems provided by the invention.
One described in the embodiment of the present invention two sections of return-flow type mud lime stabilization anhydration systems, comprise raw material add-on system, reactive system, return-flow system, discharge system and flare system, described raw material add-on system is connected to described reactive system, described reactive system comprises first stage reactor 5 and second stage reactor 6, the outlet of described first stage reactor 5 is connected with described second stage reactor 6, the bottoms material delivery port of described second stage reactor 6 is communicated with by the entrance of described return-flow system with described first stage reactor, described second stage reactor is connected with described flare system by pipeline, the bottoms material delivery port of described second stage reactor is also connected with described discharge system.
Preferably, described return-flow system is backflow spiral metering conveyor 8.
Preferably, described discharge system comprises discharging spiral conveyor 7 and stockyard hopper 9, described discharging spiral conveyor 7 is communicated with the bottoms material delivery port of described second stage reactor 6, and the outlet of described discharging spiral conveyor is positioned at the top of described stockyard hopper 9.
Preferably, described second stage reactor 6 comprises the second agitator 6-1, and the bottoms material delivery port of the second agitator is provided with feeding-distribution device, so that corresponding material is flowed to return-flow system and discharge system respectively.
Preferably, described raw material add-on system comprises lime bin 3, lime spiral metering conveyor 4, mud hopper 1 and mud spiral metering conveyor 2, and described mud hopper is communicated with the entrance of described first stage reactor by described mud spiral metering conveyor; Described lime bin is communicated with the entrance of described first stage reactor by described lime spiral metering conveyor; Described first stage reactor is also provided with unclassified stores and adds mouth 5-3.
Preferably, described first stage reactor comprises the quick high shear mixer 5-2 being positioned at bottom and the first agitator 5-1 being positioned at middle part.
Preferably, described flare system comprises wet purification tower 10 and centrifugal blower 11, and described centrifugal blower is arranged on the pipeline of described wet purification tower outlet.
A kind of two sections of return-flow type mud lime stabilization drying process, comprising:
Recirculate mixing thing, mud and lime are delivered in first stage reactor by spiral metering conveyor.；
In first stage reactor, by the rapid stirring of the agitator on stir shaft by recirculate mixing thing, mud, lime short mix, rotating speed is 40-60 rev/min, bulk mixture is constantly sheared by the quick high shear mixer that simultaneous reactions device inwall is installed, rotating speed is 1200-1600 rev/min, make mud and the raw reaction of the abundant hybrid concurrency of lime, the water ratio of mixture reduces;
Mixture through first stage reactor enters second stage reactor, and by the low rate mixing of the agitator on stir shaft in second stage reactor, rotating speed is 10 revs/min, and the moisture in mixture is reacted the heat of vaporization of generation, and water ratio significantly reduces;
Along with the stirring of agitator, through certain residence time, dry mixture is discharged reactor;
Now the temperature of mixture is higher, is about 50-60 DEG C, and by backflow spiral metering conveyor, a part of mixture is back to the front end of first stage reactor, the mixture of another part delivers to mixture stockyard by discharging spiral conveyor.
The waste gas of the high humidity high dust concentration produced in second stage reactor enters wet purification tower, high altitude discharge after purification.
The volume foundation mud handling capacity of lime bin and the ratio-dependent of lime-crushed stone pile, the residence time of lime in feed bin is set as 2-3 days.Lime spiral metering conveyor and enter mud snail and revolve metering conveyor and have function of measuring, can according to needing the lime and the mud that add different amount.The add-on of lime is the 5-30% of sludge quantity, and the backflow ratio of mixture is set as 30%-70%.The residence time of mixture in first stage reactor is 5-30 second, and the residence time of mixture in second stage reactor is 3-5 minute.
Compared with prior art, the present invention has following remarkable advantage:
(1) two sections of return-flow type mud lime stabilization anhydration systems proposed by the invention utilize the heat heating feed sludge contained by discharging thing, have both improved transporting and the mobility of mud, and have again saved the energy;
(2) two sections of return-flow type mud lime stabilization anhydration systems proposed by the invention are by the rapid stirring of first stage reactor, mud and lime are fully mixed, ensure enough residence time by the low rate mixing of second stage reactor, make to react the heat produced the moisture in mud is taken away as much as possible.While moisture percentage in sewage sludge significantly reduces, decrease the addition of lime.
(3) second stage reactor of the present invention stirs mud lime mixture by means of only the agitator on turning axle, and first stage reactor also shears mud lime mixture by the quick high shear mixer be arranged on reactor, and two reactor adopts different agitators, make discharging more even.
(4) the one-part form reactor in two sections of return-flow type mud lime stabilization anhydration systems proposed by the invention is reserved with unclassified stores and adds mouth, can according to the purposes of final product, suitably add unclassified stores, as flyash, acid etc., thus make this system can adapt to the requirement of different water cut and different treatment approach.
Claims (10)
1. one kind two sections return-flow type mud lime stabilization anhydration systems, comprise raw material add-on system, reactive system, return-flow system, discharge system and flare system, it is characterized in that, described raw material add-on system is connected to described reactive system, described reactive system comprises first stage reactor and second stage reactor, the outlet of described first stage reactor is connected with described second stage reactor, the bottoms material delivery port of described second stage reactor is communicated with by the entrance of described return-flow system with described first stage reactor, described second stage reactor is connected with described flare system by pipeline, the bottoms material delivery port of described second stage reactor is also connected with described discharge system.
2. a kind of two sections of return-flow type mud lime stabilization anhydration systems as claimed in claim 1, is characterized in that, described return-flow system is backflow spiral metering conveyor.
3. a kind of two sections of return-flow type mud lime stabilization anhydration systems as claimed in claim 1, it is characterized in that, described discharge system comprises discharging spiral conveyor and stockyard hopper, described discharging spiral conveyor is communicated with the bottoms material delivery port of described second stage reactor, and the outlet of described discharging spiral conveyor is positioned at the top of described stockyard hopper.
4. a kind of two sections of return-flow type mud lime stabilization anhydration systems as claimed in claim 1, it is characterized in that, the bottoms material delivery port of described second stage reactor is provided with feeding-distribution device, so that corresponding material is flowed to return-flow system and discharge system respectively.
5. a kind of two sections of return-flow type mud lime stabilization anhydration systems as claimed in claim 1, it is characterized in that, described raw material add-on system comprises lime bin, lime spiral metering conveyor, mud hopper and mud spiral metering conveyor, and described mud hopper is communicated with the entrance of described first stage reactor by described mud spiral metering conveyor; Described lime bin is communicated with the entrance of described first stage reactor by described lime spiral metering conveyor; Described first stage reactor is also provided with unclassified stores and adds mouth.
6. a kind of two sections of return-flow type mud lime stabilization anhydration systems as claimed in claim 1, is characterized in that, described first stage reactor comprises the quick high shear mixer being positioned at bottom and the first agitator being positioned at middle part.
7. a kind of two sections of return-flow type mud lime stabilization anhydration systems as claimed in claim 1, it is characterized in that, described flare system comprises wet purification tower and centrifugal blower, and described centrifugal blower is arranged on the pipeline of described wet purification tower outlet.
8. two sections of return-flow type mud lime stabilization drying process, comprising:
Step (10), in first stage reactor, first the mode of rapid stirring is passed through by mixing of materials, bulk mixture is cut into fritter by the mode then stirred by THE ADIABATIC SHEAR IN, and make mud and the raw reaction of the abundant hybrid concurrency of lime, the water ratio of mixture reduces;
Step (20), the material stirring and shear through first stage reactor are sent in second stage reactor, by the low rate mixing of second stage reactor, make the moisture in mixture be reacted the heat of vaporization of generation, and then water ratio is reduced;
Step (30), by return-flow system, the part hot mixture in second stage reactor is back in first stage reactor;
Step (40), the desciccate of step (20) is expelled to discharge system;
Step (50), the waste gas of high humidity high dust concentration step (20) produced send into flare system;
Step (30), (40), (50) can synchronously be carried out.
9. a kind of two sections of return-flow type mud lime stabilization drying process as claimed in claim 8, it is characterized in that, in described step (10), first the mode of rapid stirring is passed through by mixing of materials, bulk mixture is cut into fritter by the mode then stirred by THE ADIABATIC SHEAR IN, be specially: first pass through the mode of rapid stirring by mixing of materials, rotating speed is 40-60 rev/min, bulk mixture is cut into fritter by the mode then stirred by THE ADIABATIC SHEAR IN, and rotating speed is 1200-1600 rev/min.
10. a kind of two sections of return-flow type mud lime stabilization drying process as claimed in claim 8, it is characterized in that, in described step (30), described part hot mixture, is specially: temperature range is the mixture of 50-60 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610025236.XA CN105502885A (en) | 2016-01-15 | 2016-01-15 | Two-section backflow type sludge lime stable drying system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610025236.XA CN105502885A (en) | 2016-01-15 | 2016-01-15 | Two-section backflow type sludge lime stable drying system |
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| CN201610025236.XA Pending CN105502885A (en) | 2016-01-15 | 2016-01-15 | Two-section backflow type sludge lime stable drying system |
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Citations (10)
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|---|---|---|---|---|
| JPH11137950A (en) * | 1997-09-11 | 1999-05-25 | Lindauer Dornier Gmbh | Treatment of waste gas of hot drying process and more particularly sludge drying process of sewer sludge drying device and equipment for execution this method |
| CN101823825A (en) * | 2010-05-27 | 2010-09-08 | 湖南科技大学 | Sludge dehydrating and drying process method and device |
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| CN203048760U (en) * | 2013-02-01 | 2013-07-10 | 成都源创环保工程有限公司 | Device for stabilizing sludge with lime |
| CN104529104A (en) * | 2014-12-30 | 2015-04-22 | 新奥科技发展有限公司 | Sludge pretreatment method |
| CN204897692U (en) * | 2015-08-12 | 2015-12-23 | 江苏众瑞环保科技有限公司 | Mud degree of depth mummification processing system that modifies |
| CN205328846U (en) * | 2016-01-15 | 2016-06-22 | 中和荣华环保科技(北京)有限公司 | Two sections backward flow formula mud lime stabilization mummification systems |
-
2016
- 2016-01-15 CN CN201610025236.XA patent/CN105502885A/en active Pending
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| CN101823825A (en) * | 2010-05-27 | 2010-09-08 | 湖南科技大学 | Sludge dehydrating and drying process method and device |
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Application publication date: 20160420 |