CN107285597A - A kind of method and system that sludge drying is carried out using ceramics factory's waste gas residual heat - Google Patents
A kind of method and system that sludge drying is carried out using ceramics factory's waste gas residual heat Download PDFInfo
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- CN107285597A CN107285597A CN201710601969.8A CN201710601969A CN107285597A CN 107285597 A CN107285597 A CN 107285597A CN 201710601969 A CN201710601969 A CN 201710601969A CN 107285597 A CN107285597 A CN 107285597A
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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
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Abstract
A kind of method and system that sludge drying is carried out using ceramics factory's waste gas residual heat, wet mud and dewatered sludge of the ceramics factory after mechanical dehydration, respectively enter wet mud, dewatered sludge surge bunker, system is broken up through metering under storehouse, pipeline, mixing system, the first order into suspended state and breaks up drying system, and the waste gas from ceramic production line also enters sludge drying apparatus simultaneously.Sludge in drying system, which is broken up, in suspended state breaks up system by the second level, and with after waste gas sufficient heat exchange enter outer circulation piece-rate system, in outer circulation separation system bulky grain be collected, broken up through the third level system of breaing up after return to baker and continue to dry, little particle taken out of by waste gas.Dust-laden (sludge) waste gas for going out circulation separation system enters dust collecting system, dewatered sludge is after dust collecting system is collected, part is back to dewatered sludge surge bunker as dispensing through revert system, and remaining is stored as the finished product after drying, and waste gas is discharged into air after being handled through waste gas cleaning system.
Description
Technical field
It is more particularly to a kind of to carry out sludge drying using ceramics factory's waste gas residual heat the invention belongs to technical field of ceramic production
Method and system.
Background technology
With social economy and the fast development of ceramic industry, ceramic industry waste material is increasing, not only to urban environment
Exert heavy pressures on, and limit the sustainable development of development and the ceramic industry of urban economy.
It is reported that the annual Ceramic Tiles production capacity of China in 2014 is up to 139.61 hundred million square metres, wherein polished bricks production capacity accounting reaches
27.90%.And often produce 1m2Polished bricks will substantially form 2.1kg or so polishing sludge, therefore China in 2014 will produce about
8200000 tons of ceramic polished sludge.It is different from general shraff, ceramic polished sludge has that water content is high, viscosity is big,
Feature that grain particle diameter is small, specific surface area is big, pozzolanic activity is high etc., it need not be crushed, remove surface impurity and fine grinding etc.
Other complex process processes, may be directly applied to cement industry and use and replaced for Concrete Industry as binder materials as mixing material
Used for second class powered coal ash.
At present, the ceramic polished sludge of China more than 90% not yet obtains extensive efficiently utilization, and ecological environment is caused
Serious pollution.Found by investigating, the large quantity of moisture contained by ceramic polished sludge is to limit its extensive recycling
Bottleneck.
Mist projection granulating in ceramic industry production process, is dried and 3 links of kiln need to consume substantial amounts of heat energy.Now in
Its technique particularity, current mist projection granulating process and kiln calcining and the drying process thermal efficiency are relatively low, and flue gas takes heat out of greatly, cigarette
Temperature degree reaches more than 220 DEG C, there is sufficient utilization space.
The content of the invention
In order to overcome the shortcoming of above-mentioned prior art, ceramics factory's waste gas residual heat is utilized it is an object of the invention to provide one kind
Carry out the method and system of sludge drying, with reduced investment, operating cost it is low, easy to operate, maximize decrement sludge the characteristics of.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of method that sludge drying is carried out using ceramics factory's waste gas residual heat, is comprised the following steps：
The first step：Wet mud from ceramics factory and part finished product dewatered sludge are separately stored in wet, dewatered sludge surge bunker
In, wet mud surge bunker sets pressure device for discharging so as to continuous-stable discharging；
Second step：Surge bunker divides into feed proportioning system, and wet mud and dewatered sludge feed mixed after being measured respectively through metering device
Material system, wet mud transhipment uses pipe-line transportation system；
3rd step：Two kinds of materials are sufficiently mixed in mixing system and stirred, and are reached through first order decentralized system is scattered
After certain particle size, broken up into suspended state in drying system, while ceramics factory's waste gas residual heat leads to suspended state by afterbody air-introduced machine
In drying system；
4th step：After the sludge drying system bottom second level system of breaing up is broken up, brought into by the waste gas entered by bottom
Suspended state drying system, sludge and hot blast are through heat exchange, and moisture is converted into gas by liquid and enters waste gas in sludge, and sludge is dried
Dry, sludge takes suspended state drying system out of into outer circulation piece-rate system with waste gas；
5th step：Waste gas containing sludge enters dust collecting system, and sludge is collected, and waste gas enters gas purge system；
6th step：The waste gas of the sludge containing finished product enters dust collecting system, and dewatered sludge is partly returned after collection through revert system
Dewatered sludge surge bunker is as dispensing, and remaining is stored as the finished product after drying, and waste gas is discharged into greatly after being handled through waste gas cleaning system
Gas；
7th step：Waste gas is purified in cleaning system, meets discharging standards, by air-introduced machine extraction system, row
Enter air.
The sludge and waste gas residual heat can also be produce in other industry production process contain wet stickiness sludge and temperature
Waste gas more than 80 DEG C.
The waste gas residual heat be roller kilns waste gas or spraying granulation system waste gas or both mixing, EGT be 80 DEG C~
300℃。
Dewatered sludge moisture content is less than 5% after the drying, and in blending process, the water content returned through revert system is less than
5% finished product dewatered sludge, its match ratio is 0%~50% adjustable.
After disperseing through first order decentralized system, sludge particle diameter is less than less than 5000 μm；After disperseing through second level decentralized system,
Sludge particle diameter is less than less than 1000 μm.After disperseing through third level decentralized system, sludge particle diameter is less than less than 500 μm.
The outer circulation piece-rate system, its separative efficiency 10~90%, the coarse fodder isolated is returned again after being broken up through beater
Return sludge dryer.
Present invention also offers a kind of system that sludge drying is carried out using ceramics factory's waste gas residual heat, including：
For storing dry, wet mud surge bunker, surge bunker outlet sets metering system, and wet mud surge bunker, which is set, to be forced
Device for discharging；
The pipe-line transportation system transported for wet mud, its entrance connects wet mud metering system, and its material outlet connects batch mixing
System entry；
The hybrid system being stirred to sludge, its entrance connects the outlet of wet mud pipe-line transportation system, mud metering system and gone out
Mouthful, its material outlet connects first order decentralized system entrance；
The three-level dispersed system system disperseed to sludge, wherein first order decentralized system connect mixing equipment outlet, the first order
The sludge feeding second level decentralized system of presetting granularity is not up in decentralized system, the second level decentralized system is also connected with aluminium profiles
Material factory waste gas；
The suspended state drying system dried to sludge, it is connected with the outlet of second level decentralized system, also with first
Level decentralized system reaches the sludge outlet connection of presetting granularity, and sludge is oven-dried wherein；
Circulation separation system, connects the outlet of drying system, and its material outlet connects the entrance of third level material scattering machine, the
The outlet tieback drying system of three-level material scattering machine；
The dust collecting system gathered dust the waste gas for circulation separation system of going out, its entrance connects the useless of outer circulation piece-rate system
Gas is exported, and sludge is collected in dust collecting system；
Revert system, its entrance connects the discharge outlets of dust collecting system, and its outlet connects dewatered sludge surge bunker entrance；
The cleaning system purified to tail gas, its entrance connects the waste gas outlet of dust collecting system, and waste gas is obtained only wherein
Change, drawn by air-introduced machine, be discharged into air.
The drying system is dryer, and the material dispersion system is material scattering machine, and the dust collecting system is dust
Collector, the dust collector is cyclone cylinder or electricity gathers dust or bag gathers dust or three's combination, and the drying system is grasped for negative pressure
Make, its power resources is in tail end air-introduced machine.
The air cleaning system need to be according to atmosphere pollution newly-generated in atmosphere pollution in former flue gas and drying course
Thing is determined；If producing new atmosphere pollution in the middle part of drying course, original system air cleaning system is utilized.
The present invention may also include the atomization system being placed in drying system disperseed to sludge, and its entrance connects surge bunker
Outlet, sludge particle diameter is less than 1500 μm after atomization.
Compared with prior art, the beneficial effects of the invention are as follows：
1) technical process is simple, and reduced investment, floor space is small.
2) operation energy consumption is low.
3) it is easy to operate.
4) sludge can further recycling after handling.
To sum up, moisture percentage in sewage sludge ＜ 5% after present invention drying, simple flow, control is simple, invests small, operation energy consumption is small,
Dry sludge can further recycling, with good social value.
Brief description of the drawings
Fig. 1 is the structural representation of sludge drying system form one of the invention.
Fig. 2 is the structural representation of sludge drying system form two of the invention.
Fig. 3 is the structural representation of sludge drying system form three of the invention.
Fig. 4 is sludge furnace drying method schematic flow sheet of the invention.
Embodiment
Describe embodiments of the present invention in detail with reference to the accompanying drawings and examples.
It is one of present system form such as Fig. 1
With reference to Fig. 4, sludge delivers to sludge surge bunker 01a through induction system or portable scraper equipment, and dewatered sludge is (after drying
Finished product) dewatered sludge surge bunker 01b is delivered to through revert system, surge bunker 01a~b plays induction system and rear end drying system energy
The unmatched adjustment effect of power.Set in surge bunker 01a and force device for discharging 02, it plays the work of wet mud continuous uniform blanking
With.Surge bunker 01a~b hypomeres set metering device 03a~b to measure sludge quantity.Wet mud after metering and dry dirt
Mud feeds mixing system 05.Wherein, wet mud transhipment is delivered to mixing system using pipe-line transportation system 04 by metering system 03a
05.Agitated mixed sludge is broken up after mixing device 05 is mixed through the first time of first order dispersing device 06, feeding drying
The bottom of machine 08,1500 μm of sludge particle diameter ＜ after being broken up through second level dispersing device 07.From kiln calcining drying system waste gas warp
Adjust wind-warm syndrome after flow valve 15 and cold blast sliding valve 14, regulation air distribution to control at 80~300 DEG C, into dryer 08, waste gas flowing is
Negative-pressure operation, its power comes from air-introduced machine 13.In dryer 08, sludge and waste gas carry out sufficient heat exchange, sludge reclaimed water
Divide and enter waste gas, sludge is oven-dried.Dust-laden (sludge) waste gas for going out dryer enters outer circulation separation equipment 09.In outer circulation point
Return dryer is collected from bulky grain in equipment 09 to continue to dry, bulky grain is divided again by material scattering machine 10 in return course
Dissipate, little particle is taken out of as finished product with waste gas.Subsequent sludge takes outer circulation separator 09 out of by waste gas, into dust collecting system
11, dewatered sludge is collected in dust collecting system 11, and as drying finished product, waste gas enters waste gas cleaning system 12.In waste gas
Atmosphere pollution is fallen in waste gas removing in cleaning system 12, reaches discharging standards, air is put into through air-introduced machine 13.Wherein, receive
Dirt system 11 is bag collector.
It is the two of present system form such as Fig. 2
With reference to Fig. 4, sludge delivers to sludge surge bunker 01a through induction system or portable scraper equipment, and dewatered sludge is (after drying
Finished product) dewatered sludge surge bunker 01b is delivered to through revert system, surge bunker 01a~b plays induction system and rear end drying system energy
The unmatched adjustment effect of power.Set in surge bunker 01a and force device for discharging 02, it plays the work of wet mud continuous uniform blanking
With.Surge bunker 01a~b hypomeres set metering device 03a~b to measure sludge quantity.Wet mud after metering and dry dirt
Mud feeds mixing system 05.Wherein, wet mud transhipment is delivered to mixing system using pipe-line transportation system 04 by metering system 03a
05.Agitated mixed sludge is broken up after mixing device 05 is mixed through the first time of first order dispersing device 06, feeding drying
The bottom of machine 08,1500 μm of sludge particle diameter ＜ after being broken up through second level dispersing device 07.Drying system and spraying are calcined from kiln
Wind-warm syndrome control enters at 80~300 DEG C after the adjusted flow valve 15,16 of waste gas and cold blast sliding valve 14 of granulating system, regulation air distribution
Dryer 08, waste gas flowing is negative-pressure operation, and its power comes from air-introduced machine 13.In dryer 08, sludge and waste gas are filled
Moisture enters waste gas in the heat exchange divided, sludge, and sludge is oven-dried.Dust-laden (sludge) waste gas for going out dryer divides into outer circulation
From equipment 09.Bulky grain is collected return dryer and continues to dry in outer multi-cycle separation equipment 09, bulky grain in return course
Disperseed again by material scattering machine 10, little particle is taken out of as finished product with waste gas.Subsequent sludge takes outer circulation point out of by waste gas
From device 09, into dust collecting system 11, dewatered sludge is collected in dust collecting system 11, and as drying finished product, waste gas enters useless
Gas cleaning system 12.Atmosphere pollution is fallen in waste gas removing in waste gas cleaning system 12, discharging standards is reached, through air-introduced machine
13 are put into air.Wherein, dust collecting system 11 is rotoclone collector.
It is the three of present system form such as Fig. 3
With reference to Fig. 4, sludge delivers to sludge surge bunker 01a through induction system or portable scraper equipment, and dewatered sludge is (after drying
Finished product) dewatered sludge surge bunker 01b is delivered to through revert system, surge bunker 01a~b plays induction system and rear end drying system energy
The unmatched adjustment effect of power.Set in surge bunker 01a and force device for discharging 02, it plays the work of wet mud continuous uniform blanking
With.Surge bunker 01a~b hypomeres set metering device 03a~b to measure sludge quantity.Wet mud after metering and dry dirt
Mud feeds mixing system 05.Wherein, wet mud transhipment is delivered to mixing system using pipe-line transportation system 04 by metering system 03a
05.Agitated mixed sludge is broken up after mixing device 05 is mixed through the first time of first order dispersing device 06, feeding drying
The bottom of machine 08,1500 μm of sludge particle diameter ＜ after being broken up through second level dispersing device 07.From kiln calcining drying system waste gas warp
Adjust wind-warm syndrome after flow valve 15 and cold blast sliding valve 14, regulation air distribution to control at 80~300 DEG C, into dryer 08, waste gas flowing is
Negative-pressure operation, its power comes from air-introduced machine 13.In dryer 08, sludge and waste gas carry out sufficient heat exchange, sludge reclaimed water
Divide and enter waste gas, sludge is oven-dried.Dust-laden (sludge) waste gas for going out dryer enters outer circulation separation equipment 09.In outer circulation point
Return dryer is collected from bulky grain in equipment 09 to continue to dry, bulky grain is divided again by material scattering machine 10 in return course
Dissipate, little particle is taken out of as finished product with waste gas.Subsequent sludge takes outer circulation separator 09 out of by waste gas, into dust collecting system
11, dewatered sludge is collected in dust collecting system 11, as drying finished product, and waste gas enters existing waste gas purification through air-introduced machine 13
System, it is purified it is up to standard after, by existing air inducing system cylinder be discharged into air.Wherein, dust collecting system 11 is bag collector.
Above example is not that invention is preferably exhaustive, and apparatus-form of the invention can also have diversified forms.
To sum up, a kind of method and system that sludge drying is carried out using ceramics factory's waste gas residual heat of the invention, ceramics factory is through machine
Tool dehydration after aqueous more than 30% wet mud and aqueous less than 5% dewatered sludge (finished product after drying), respectively enter wet mud,
Dewatered sludge surge bunker, breaks up system into suspended state through metering under storehouse, pipeline, mixing system, the first order and breaks up drying system
System, the waste gas from ceramic production line also enters sludge drying apparatus simultaneously.Sludge in drying system is broken up in suspended state to pass through
System is broken up in the second level, and with enter outer circulation piece-rate system after waste gas sufficient heat exchange, big in outer circulation separation system
Grain is collected, broken up through the third level system of breaing up after return to baker and continue to dry, little particle taken out of by waste gas.Go out multi-cycle separation
Dust-laden (sludge) waste gas of system enters dust collecting system, and dewatered sludge is partly back to after dust collecting system is collected through revert system
Dewatered sludge surge bunker is as dispensing, and remaining is stored as the finished product after drying, and waste gas is discharged into greatly after being handled through waste gas cleaning system
Gas.Moisture percentage in sewage sludge is less than 5% after present invention drying, and system utilizes ceramic production line itself waste gas residual heat, without external heat source,
Operating cost is low, and sludge is that further recycling creates good condition after drying, with fabulous social value.
It is described above, only it is the preferred embodiments of the present invention, not this does any formal limitation to invention, although
The present invention is disclosed as above with preferred embodiments, but is not intended to limit the present invention, any to be familiar with those skilled in the art,
Do not depart from the range of inventive technique scheme, when the technology contents using the disclosure above make any a little change or are modified to
With change equivalent embodiment, as long as being the content without departing from technical solution of the present invention, according to the present invention technical spirit to
Any simple modification, equivalent variations and modification that upper embodiment is made, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of method that sludge drying is carried out using ceramics factory's waste gas residual heat, it is characterised in that comprise the following steps：
The first step：Wet mud from ceramics factory and part finished product dewatered sludge are separately stored in wet, dewatered sludge surge bunker, it is wet
Sludge surge bunker sets pressure device for discharging so as to continuous-stable discharging；
Second step：Surge bunker divides into feed proportioning system, and wet mud and dewatered sludge feed batch mixing system after being measured respectively through metering device
System, wet mud transhipment uses pipe-line transportation system；
3rd step：Two kinds of materials are sufficiently mixed in mixing system and stirred, and are reached necessarily through first order decentralized system is scattered
After granularity, break up in drying system, dried while ceramics factory's waste gas residual heat leads to suspended state by afterbody air-introduced machine into suspended state
In system；
4th step：After the sludge drying system bottom second level system of breaing up is broken up, suspension is brought into by the waste gas entered by bottom
State drying system, sludge and hot blast are through heat exchange, and moisture is converted into gas by liquid and enters waste gas in sludge, and sludge is oven-dried,
Sludge takes suspended state drying system out of into outer circulation piece-rate system with waste gas；
5th step：Waste gas containing sludge enters dust collecting system, and sludge is collected, and waste gas enters gas purge system；
6th step：The waste gas of the sludge containing finished product enters dust collecting system, and dewatered sludge partly returns to dry dirt after collection through revert system
Mud surge bunker is as dispensing, and remaining is stored as the finished product after drying, and waste gas is discharged into air after being handled through waste gas cleaning system；
7th step：Waste gas is purified in cleaning system, meets discharging standards, by air-introduced machine extraction system, is discharged into big
Gas.
2. the method for sludge drying is carried out using ceramics factory's waste gas residual heat according to claim 1, it is characterised in that the dirt
Mud and waste gas residual heat can also be that what is produced in other industry production process be more than 80 DEG C of waste gas containing wet stickiness sludge and temperature.
3. the method for sludge drying is carried out using ceramics factory's waste gas residual heat according to claim 1, it is characterised in that described useless
Gas waste heat mixes for roller kilns waste gas or spraying granulation system waste gas or both, and EGT is 80 DEG C~300 DEG C.
4. the method for sludge drying is carried out using ceramics factory's waste gas residual heat according to claim 1, it is characterised in that the baking
Dewatered sludge moisture content is less than 5% after dry, in blending process, and the water content returned through revert system is less than the 5% dry dirt of finished product
Mud, its match ratio is 0%~50% adjustable.
5. the method for sludge drying is carried out using ceramics factory's waste gas residual heat according to claim 1, it is characterised in that through first
After level decentralized system is scattered, sludge particle diameter is less than less than 5000 μm；After disperseing through second level decentralized system, sludge particle diameter is less than
Less than 1000 μm.After disperseing through third level decentralized system, sludge particle diameter is less than less than 500 μm.
6. the method for sludge drying is carried out using ceramics factory's waste gas residual heat according to claim 1, it is characterised in that described outer
Circulation separation system, its separative efficiency 10~90%, the coarse fodder isolated returns again to sludge dryer after being broken up through beater.
7. a kind of system that sludge drying is carried out using ceramics factory's waste gas residual heat, it is characterised in that including：
For storing dry, wet mud surge bunker, surge bunker outlet sets metering system, and wet mud surge bunker, which is set, forces discharging
Device；
The pipe-line transportation system transported for wet mud, its entrance connects wet mud metering system, and its material outlet connects mixing system
Entrance；
The hybrid system being stirred to sludge, its entrance connects the outlet of wet mud pipe-line transportation system, the outlet of mud metering system, its
Material outlet connects first order decentralized system entrance；
The three-level dispersed system system disperseed to sludge, wherein first order decentralized system connect mixing equipment outlet, and the first order is disperseed
The sludge feeding second level decentralized system of presetting granularity is not up in system, the second level decentralized system is also connected with aluminium section bar plant
Waste gas；
The suspended state drying system dried to sludge, it is connected with the outlet of second level decentralized system, also with the first fraction
Scattered system reaches the sludge outlet connection of presetting granularity, and sludge is oven-dried wherein；
Circulation separation system, connects the outlet of drying system, and its material outlet connects the entrance of third level material scattering machine, the third level
The outlet tieback drying system of material scattering machine；
The dust collecting system gathered dust the waste gas for circulation separation system of going out, the waste gas that its entrance connects outer circulation piece-rate system goes out
Mouthful, sludge is collected in dust collecting system；
Revert system, its entrance connects the discharge outlets of dust collecting system, and its outlet connects dewatered sludge surge bunker entrance；
The cleaning system purified to tail gas, its entrance connects the waste gas outlet of dust collecting system, and waste gas is purified wherein, by
Air-introduced machine is drawn, and is discharged into air.
8. the system of sludge drying is carried out using ceramics factory's waste gas residual heat according to claim 7, it is characterised in that the baking
Dry systems are dryer, and the material dispersion system is material scattering machine, and the dust collecting system is dust collector, the dust
Collector is that cyclone cylinder or electricity gather dust or bag gathers dust or three's combination, and the drying system is negative-pressure operation, its power resources in
Tail end air-introduced machine.
9. the system of sludge drying is carried out using ceramics factory's waste gas residual heat according to claim 8, it is characterised in that the sky
Gas cleaning system need to be determined according to atmosphere pollution newly-generated in atmosphere pollution in former flue gas and drying course；If drying
New atmosphere pollution is produced in the middle part of dry process, then utilizes original system air cleaning system.
10. the system of sludge drying is carried out using ceramics factory's waste gas residual heat according to claim 7, it is characterised in that also wrap
The atomization system being placed in drying system disperseed to sludge is included, its entrance connects surge bunker outlet, sludge particle diameter after atomization
Less than 1500 μm.
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| CN201710601969.8A CN107285597A (en) | 2017-07-21 | 2017-07-21 | A kind of method and system that sludge drying is carried out using ceramics factory's waste gas residual heat |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0515900A (en) * | 1990-12-28 | 1993-01-26 | Tsukishima Kikai Co Ltd | Method and device for drying water-containing sludge |
| CN104176902A (en) * | 2014-08-31 | 2014-12-03 | 华北电力大学（保定） | Fluidized bed sludge drying system |
| CN106810036A (en) * | 2015-11-30 | 2017-06-09 | 周子童 | A kind of coal slime, drying sludge device for improving quality and technique |
-
2017
- 2017-07-21 CN CN201710601969.8A patent/CN107285597A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0515900A (en) * | 1990-12-28 | 1993-01-26 | Tsukishima Kikai Co Ltd | Method and device for drying water-containing sludge |
| CN104176902A (en) * | 2014-08-31 | 2014-12-03 | 华北电力大学（保定） | Fluidized bed sludge drying system |
| CN106810036A (en) * | 2015-11-30 | 2017-06-09 | 周子童 | A kind of coal slime, drying sludge device for improving quality and technique |
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Application publication date: 20171024 |