CN102417287A - Sludge treatment system and method - Google Patents
Sludge treatment system and method Download PDFInfo
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- CN102417287A CN102417287A CN2011103136739A CN201110313673A CN102417287A CN 102417287 A CN102417287 A CN 102417287A CN 2011103136739 A CN2011103136739 A CN 2011103136739A CN 201110313673 A CN201110313673 A CN 201110313673A CN 102417287 A CN102417287 A CN 102417287A
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- 239000010802 sludge Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000001035 drying Methods 0.000 claims abstract description 33
- 239000002699 waste material Substances 0.000 claims abstract description 12
- 239000008187 granular material Substances 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 14
- 238000004043 dyeing Methods 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 13
- 238000007639 printing Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000002689 soil Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 10
- 238000002203 pretreatment Methods 0.000 claims description 10
- 238000001704 evaporation Methods 0.000 claims description 7
- 230000008020 evaporation Effects 0.000 claims description 7
- 230000008030 elimination Effects 0.000 claims description 6
- 238000003379 elimination reaction Methods 0.000 claims description 6
- 238000000629 steam reforming Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 230000002269 spontaneous effect Effects 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 4
- 239000003245 coal Substances 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000004513 sizing Methods 0.000 claims description 4
- 238000007872 degassing Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 17
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- Treatment Of Sludge (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a sludge treatment system which comprises a dryer for drying sludge, wherein one end of the dryer is connected with a feeder for conveying sludge and a hot air fan for conveying hot air, the other end of the dryer is connected with a cyclone discharger and a third belt conveyor for conveying waste materials, a draught fan for outputting hot air is connected above the cyclone discharger, and a second belt conveyor for conveying the treated sludge is arranged at a discharge opening below the cyclone discharger. After the technical scheme is adopted, the invention not only opens up an effective new way for thoroughly carrying out harmless, reduction and resource treatment on the municipal sludge, but also has important theoretical significance and practical guiding significance for realizing the purposes of treating wastes with processes of wastes against one another and recycling the wastes in the municipal sludge treatment in China.
Description
Technical field
The present invention relates to a kind of sludge treating system, also relate to a kind of method for sludge treatment simultaneously, belong to field of sludge treatment.
Background technology
Along with the continuous growth and the industrial develop rapidly of urban population, city domestic sewage and amount of industrial wastewater grow with each passing day.In order to preserve the ecological environment, the city effluent sewage must pass through processing, could discharge after up to standard.Yet sewage can produce a large amount of mud when being purified processing; Because this type mud has the water ratio height and volume is big; And the characteristics of the various hazardous and noxious substances that concentrated, if can not get disposing safely, can bring serious secondary pollution to environment; Not only can't embody the environmental benefit that is produced after the WWT, and directly have influence on the normal operation of sewage work.Sludge drying and incineration disposal can reach really that sludge treatment is innoxious, the purpose of minimizing and resource utilization.But all there is bigger defective in they: it is bigger to dispose power consumption, and this is the high for a long time major reason of sludge treatment cost.Therefore; How science is disposed sludge from wastewater treatment plant economically becomes global problem; Innoxious, minimizing, the recycling treatment of municipal sludge become the target that whole world environmental administration is made joint efforts, because municipal sludge is disposed up hill and dale.
Chemical fibre, printing and dyeing occupy bigger ratio in city's trade effluent.A large amount of mud that waste water produces after treatment; Owing to the effective method for sludge treatment that does not have in the world to use for reference, therefore, the disposal options of interim landfill is mainly adopted in the whole nation to this mud at present; A large amount of soils had both been taken; Again ecotope is damaged, particularly the effluent seepage in the mud brings serious threat to groundwater resource.But this mud is because of containing higher organic constituent and fibrous matter, and has higher calorific value, and this is utilized as resource than other mud has more remarkable advantages.
Summary of the invention
The present invention is directed to the shortcoming of existing treatment system, a kind of method and system that utilizes the printing and dyeing of thermal power plant boiler VT, chemical fibre class mud is provided, reach the technique effect of comprehensive utilization of resources preferably.
According to first purpose of the present invention, the invention provides a kind of sludge treating system, its concrete technical scheme is following:
A kind of sludge treating system; Comprise, be used for mud is carried out the exsiccant dryer that one end of said dryer is connected with the charger of carrying mud and the calorifier that is used for heat air delivery; The 3rd rotary conveyor that the other end is connected with the whirlwind dumper and is used to carry waste material; Wherein, the top of said whirlwind dumper is connected with the induced draft fan that is used to export hot gas, and discharge opening place in below is provided with second rotary conveyor of the mud that is used to carry after treatment.
Further; Preferably, said charger also is connected with hopper, first rotary conveyor and apparatus for feeding, wherein; After the mud of from apparatus for feeding, carrying enters into first rotary conveyor, be discharged in the hopper with among entering into charger from hopper by first rotary conveyor.
Further, preferably, it is hot blast that said calorifier is used for the steam reforming that comes from thermal power plant boiler; Comprise; Calorifier power part and heat conduction case, said heat conduction case one end is connected with high-temperature steam input tube and muffler, and the other end is provided with the hot-blast outlet that is used to export hot blast.
Further, preferably, said dryer is a three-cylinder drier, comprises the drying drum that is used for sludge-drying.
According to second purpose of the present invention, the invention provides a kind of method for sludge treatment, its concrete technical scheme is following:
A kind of method for sludge treatment specifically comprises:
To pass through and carry out pretreated mud in yard and be transported among the dryer;
Utilization is carried out drying to form mud granule to above-mentioned mud by the hot blast of the steam reforming that comes from thermal power plant boiler in dryer.
Further, preferably, saidly mud carried out pre-treatment specifically comprise:
With water cut be about 80% printing and dyeing, chemical fibre class mud on yard, make portion of water spontaneous evaporation in the mud, and make the mud homogenizing.
Further, preferably, said will the process carried out pretreated mud in yard and comprised among being transported to dryer:
To pass through pretreated printing and dyeing, chemical fibre class mud through charging first rotary conveyor, hopper and charger, and be dispersed and send among the dryer equably.
Further, preferably, said above-mentioned mud is carried out drying with after forming the mud granule, also comprises:
Through sizing screen, be that the mud granule of 2-6mm is used to fire light energy saving brick and produces cement pressing products with particle diameter, with particle diameter greater than with less than the mud granule of 2-6mm auxiliary fuel, or as the refuse landfill overburden soil as fire coal.
Further, preferably, also comprise: the gas after drying sludge is handled carries out the dedusting degasification, discharges after reaching national atmospheric emission standard;
For the gas that discharges in the mud granule process of cooling, and the exchange of air in mummification workshop, send into the biological soil filter bed through induced draught system and carry out the biology elimination.
Further, preferably, also comprise: the gas that discharges during to the mud pre-treatment, through gas gathering system, send into heat power plant's roasting kiln high temperature and eliminate.
The present invention has taked after the technique scheme; Be not merely municipal sludge and can access innoxious completely, minimizing, recycling treatment; Opened up an effective new way; And China municipal sludge handled the target that realizes the treatment of wastes with processes of wastes against one another and the cyclic utilization of waste, have important significance for theories and practical advice meaning.
Description of drawings
Below in conjunction with accompanying drawing the present invention is carried out detailed description, so that above-mentioned advantage of the present invention is clearer and more definite.
Fig. 1 is the structural representation of sludge treating system embodiment of the present invention.
Fig. 2 is the synoptic diagram of the calorifier in the sludge treating system of the present invention.
Embodiment
Describe below in conjunction with specific embodiment, wherein, Fig. 1 is the structural representation of sludge treating system embodiment of the present invention.
As scheme saidly, said sludge treating system comprises; Be used for mud is carried out exsiccant dryer 6; One end of said dryer 6 is connected with the charger 4 of carrying mud and the calorifier 5 that is used for heat air delivery, the 3rd rotary conveyor 7 that the other end is connected with whirlwind dumper 9 and is used to carry waste material, wherein; The top of said whirlwind dumper 9 is connected with the induced draft fan 8 that is used to export gas, and discharge opening place in below is provided with second rotary conveyor 10 of the mud that is used to carry after treatment.
And; Said charger 4 also is connected with hopper 3, first rotary conveyor 2 and apparatus for feeding 1; Wherein, after the mud of from apparatus for feeding 1, carrying enters into first rotary conveyor 2, be discharged in the hopper 3 with among entering into charger 4 from hopper 3 by first rotary conveyor 2.
And; For mud can fully be contacted with heat when the mummification; Improve the efficient of sludge drying; Simultaneously for the mud granulating creates conditions, will pass through pretreated printing and dyeing, chemical fibre class mud through above-mentioned apparatus for feeding 1, first rotary conveyor 2 and hopper 3 and charger 4 after, can be dispersed and send into equably among the dryer 6.
Among the present embodiment, it is hot blast that said calorifier 5 is used for the steam reforming that comes from thermal power plant boiler, and Fig. 2 is the synoptic diagram of the calorifier in the sludge treating system of the present invention.
As scheme saidly, and said calorifier specifically comprises, and calorifier power part 502 and heat conduction case 501, said heat conduction case 501 1 ends are connected with high-temperature steam input tube 503 and muffler 504, and the other end is provided with the hot-blast outlet 505 that is used to export hot blast.
Said heat conduction case 501 set inside have many heat pipes; Wherein, After high-temperature steam entered into heat conduction case 501, the heat pipe inner to the heat conduction case heated, thereby the air that the heat conduction case is inner heats; After heating is accomplished, by said calorifier power part 502 hot blast is sent to dryer 6 from hot-blast outlet 505 among.
Among preferred embodiment, said dryer 6 is a three-cylinder drier, comprises the drying drum that is used for sludge-drying.
Usually, three cartridge type dryers are mainly used in certain humidity of oven dry and size range endoparticle material.Like yellow ground, molding sand, slag, cinder, small grain size clay, and be not afraid of other small particles material that high temperature and flue dust are made dirty.Material moisture after the oven dry can reach below the 1-0.5%.
Three cartridge type dryers have compact construction, simple structure, rationally distributed, improve the rate of heat exchange of material and heat energy, make drying materials effective; The basis less investment only is 1/2nd of an identical output monotubular dryer, has reduced disposable input; Reliable, energy consumption is low, thermo-efficiency is high; Simultaneously, realize robotization control easily, reduce operator, the labor savings resource.
Carry out detailed description to method for sludge treatment of the present invention below, said method mainly comprises: will pass through and carry out pretreated mud in yard and be transported among the dryer;
Utilization is carried out drying to form mud granule to above-mentioned mud by the hot blast of the steam reforming that comes from thermal power plant boiler in dryer.
Among the preferred embodiment, saidly mud carried out pre-treatment specifically comprise:
With water cut be about 80% printing and dyeing, chemical fibre class mud on yard, make portion of water spontaneous evaporation in the mud, and make the mud homogenizing.
Further, among the preferred embodiment, said will the process carried out pretreated mud in yard and comprised among being transported to dryer:
To pass through pretreated printing and dyeing, chemical fibre class mud through charging first rotary conveyor, hopper and charger, and be dispersed and send among the dryer equably.
Further, among the preferred embodiment, said above-mentioned mud is carried out drying with after forming the mud granule, also comprises:
Through sizing screen, be that the mud granule of 2-6mm is used to fire light energy saving brick and produces cement pressing products with particle diameter, with particle diameter greater than with less than the mud granule of 2-6mm auxiliary fuel, or as the refuse landfill overburden soil as fire coal.
Further, among the preferred embodiment, also comprise: the gas after drying sludge is handled carries out the dedusting degasification, discharges after reaching national atmospheric emission standard;
For the gas that discharges in the mud granule process of cooling, and the exchange of air in mummification workshop, send into the biological soil filter bed through induced draught system and carry out the biology elimination.
Further, among the preferred embodiment, also comprise: the gas that discharges during to the mud pre-treatment, through gas gathering system, send into heat power plant's roasting kiln high temperature and eliminate.
The implementation step of a more specific embodiment of aforesaid method can be with reference to following technology operating procedure:
With water cut is that about 80% printing and dyeing, chemical fibre class mud carry out pre-treatment in yard, and this process not only can make portion of water spontaneous evaporation in the mud, and can make the mud homogenizing.The pretreated time can decide according to the size and the weather condition of stacking the place;
For mud can fully be contacted with heat when the mummification; Improve the efficient of sludge drying,, will pass through pretreated printing and dyeing, chemical fibre class mud through special apparatus for feeding simultaneously for the mud granulating creates conditions; Be dispersed and send into drying plant equably, carry out mummification;
Mud gets into the internal layer of revolving cylinder by feed device, realizes the following current oven dry, and the mud travelling of under the flight of internal layer, constantly taking up, be scattered is in the shape of a spiral realized heat exchange; The other end that mud moves to internal layer gets into the middle level; Carry out the adverse current oven dry, mud is constantly raised in the middle level repeatedly, is the into mode of advancing of two step backwards; Mud had both fully absorbed the heat that the internal layer cylinder distributes in the middle level; Absorb the heat of middle level cylinder again, prolonged time of drying again simultaneously, mud reaches the optimum drying state at this.Mud walks to the middle level the other end and falls into skin; Mud rectangular multiloop mode in outer cylinder is advanced, and is obtaining effective mummification, further granulating and Mo Yuan in the scroll-up/down continuously, and hardening gradually; The mud that the reaches drying effect discharge cylinder of under the hot blast effect, advancing fast; The mud granule that slave unit comes out through sizing screen, is that the mud granule of 2-6mm is used to fire light energy saving brick and produces cement pressing products with particle diameter; With particle diameter greater than with less than the mud granule of 2-6mm auxiliary fuel, or as the refuse landfill overburden soil as fire coal.The wet stock that does not reach drying effect can not be advanced because of deadweight fast, and material carries out thorough drying in this rectangle flight, accomplish drying purpose thus.
And printing and dyeing, chemical fibre class mud are in drying process, and the tail gas that produces in the sludge drying after handling through the dedusting degasifying device, discharges after reaching national atmospheric emission standard.The gas that discharges during for the mud pre-treatment; Through gas gathering system, send into heat power plant's roasting kiln high temperature and eliminate the gas that discharges in the dewatered sludge process of cooling; And the exchange of air in mummification workshop, send into the biological soil filter bed through induced draught system and carry out the biology elimination.
Because general printing and dyeing, chemical fibre class moisture percentage in sewage sludge is about 80%; Get into and in the stockyard, carry out earlier pre-treatment in the sludge treatment factory; Make mud homogenizing and decentralized on the one hand; Portion of water is fallen in spontaneous evaporation on the other hand, and the water ratio of mud is decreased, for the mummification effect that improves mud creates conditions.
Further embodiments of the invention are carried out detailed further describing:
After mud got into sludge drying and granulating system, the moisture in the mud was under heat effect that receives hot gas and convection action, and rapid evaporation, the water vapor that from mud, distributes is discharged with flue gas.
Through after above-mentioned, mud is through rotary type mummification and granulating process, and water ratio has dropped to about 30% when arriving discharge port, and forms the granule shape intermediates that particle diameter is 1-10mm.
Simultaneously, the mud granule after the said mummification gets into the mud stockyard, in this process; Cooling gradually along with the mud granule; Moisture wherein further obtains evaporation, and before by recycling, at this moment the water ratio of mud granule can be reduced to below 25%.
And, among a specific embodiment, utilize thermal power plant boiler steam to carry out in sludge drying and the granulated whole process, begin from the pre-treatment of mud; To sludge drying, last granulating, and the transmission of mud in this process; All under the totally enclosed state of little negative pressure, carry out, the gas that mud discharges is admitted to burner hearth and biological soil filter bed through gas gathering system; Or through the high temperature elimination, or through the soil microorganisms elimination, thereby make the work-yard of sludge treatment not have obvious peculiar smell.Particularly sludge drying and granulating are accomplished at low temperatures.
The present invention can not only make printing and dyeing sludge and municipal sludge obtain innoxious completely, minimizing, recycling treatment; And the residual heat resources of heat power plant are fully utilized; And can reduce atmospheric heat and pollute the quantity discharged with flue dust, demonstrated fully this technology potential clear superiority that popularization had that is applied.And; The residual heat resources that the generating back is discharged are used for handling mud; Under the situation that does not consume new forms of energy, make municipal sludge obtain handling completely on the one hand, make the waste gas of heat power plant obtain utilizing on the other hand; Really realized the target of the recycling economy of the treatment of wastes with processes of wastes against one another, this will produce extremely significant social, environment, economic triple benefits.
It should be noted that; Above-mentioned specific embodiment only is exemplary; Under above-mentioned instruction of the present invention, those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description, and these improve or distortion drops in protection scope of the present invention.It will be understood by those skilled in the art that top specific descriptions just in order to explain the object of the invention, are not to be used to limit the present invention.Protection scope of the present invention is limited claim and equivalent thereof.
Claims (10)
1. a sludge treating system is characterized in that, comprises; Be used for mud is carried out the exsiccant dryer; One end of said dryer is connected with the charger of carrying mud and the calorifier that is used for heat air delivery, the 3rd rotary conveyor that the other end is connected with the whirlwind dumper and is used to carry waste material, wherein; The top of said whirlwind dumper is connected with the induced draft fan that is used to export hot gas, and discharge opening place in below is provided with second rotary conveyor of the mud that is used to carry after treatment.
2. sludge treating system according to claim 1; It is characterized in that; Said charger also is connected with hopper, first rotary conveyor and apparatus for feeding; Wherein, after the mud of from apparatus for feeding, carrying enters into first rotary conveyor, be discharged in the hopper with among entering into charger from hopper by first rotary conveyor.
3. sludge treating system according to claim 1 and 2; It is characterized in that; It is hot blast that said calorifier is used for the steam reforming that comes from thermal power plant boiler, comprises calorifier power part and heat conduction case; Said heat conduction case one end is connected with high-temperature steam input tube and muffler, and the other end is provided with the hot-blast outlet that is used to export hot blast.
4. sludge treating system according to claim 1 and 2 is characterized in that said dryer is a three-cylinder drier, comprises the drying drum that is used for sludge-drying.
5. method for sludge treatment specifically comprises:
To pass through and carry out pretreated mud in yard and be transported among the dryer;
Utilization is carried out drying to form mud granule to above-mentioned mud by the hot blast of the steam reforming that comes from thermal power plant boiler in dryer.
6. method for sludge treatment according to claim 5 is characterized in that, saidly mud is carried out pre-treatment specifically comprises:
To print and dye, chemical fibre class mud on yard, make portion of water spontaneous evaporation in the mud, and make the mud homogenizing.
7. according to claim 5 or 6 described method for sludge treatment, it is characterized in that said will the process carried out pretreated mud in yard and comprised among being transported to dryer:
To pass through pretreated printing and dyeing, chemical fibre class mud through charging first rotary conveyor, hopper and charger, and be dispersed and send among the dryer equably.
8. according to claim 5 or 6 described method for sludge treatment, it is characterized in that, said above-mentioned mud carried out drying with after forming the mud granule, also comprise:
Through sizing screen, be that the mud granule of 2-6mm is used to fire light energy saving brick and produces cement pressing products with particle diameter, with particle diameter greater than with less than the mud granule of 2-6mm auxiliary fuel, or as the refuse landfill overburden soil as fire coal.
9. according to claim 5 or 6 described method for sludge treatment, it is characterized in that, also comprise: the gas after drying sludge is handled carries out the dedusting degasification, discharges after reaching national atmospheric emission standard;
For the gas that discharges in the mud granule process of cooling, and the exchange of air in mummification workshop, send into the biological soil filter bed through induced draught system and carry out the biology elimination.
10. according to claim 5 or 6 described method for sludge treatment, it is characterized in that, also comprise: the gas that discharges during to the mud pre-treatment, through gas gathering system, send into heat power plant's roasting kiln high temperature and eliminate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103136739A CN102417287A (en) | 2011-10-17 | 2011-10-17 | Sludge treatment system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103136739A CN102417287A (en) | 2011-10-17 | 2011-10-17 | Sludge treatment system and method |
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| CN102417287A true CN102417287A (en) | 2012-04-18 |
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| CN2011103136739A Pending CN102417287A (en) | 2011-10-17 | 2011-10-17 | Sludge treatment system and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104277883A (en) * | 2013-09-13 | 2015-01-14 | 苏韶华 | Preparation method of sludge synthetic fuel |
| CN104710094A (en) * | 2013-12-13 | 2015-06-17 | 天华化工机械及自动化研究设计院有限公司 | Printing and dyeing sludge drying method and apparatus thereof |
| CN106277705A (en) * | 2016-09-29 | 2017-01-04 | 中冶华天南京工程技术有限公司 | Process and the system of smelting furnace is returned in the direct mummification of pickling mud |
| CN106380056A (en) * | 2016-08-18 | 2017-02-08 | 郭凯 | A municipal sludge deep drying device |
-
2011
- 2011-10-17 CN CN2011103136739A patent/CN102417287A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104277883A (en) * | 2013-09-13 | 2015-01-14 | 苏韶华 | Preparation method of sludge synthetic fuel |
| CN104277883B (en) * | 2013-09-13 | 2017-06-06 | 陕西楷华环保科技有限公司 | The preparation method of sludge synthetic fuel |
| CN104710094A (en) * | 2013-12-13 | 2015-06-17 | 天华化工机械及自动化研究设计院有限公司 | Printing and dyeing sludge drying method and apparatus thereof |
| CN106380056A (en) * | 2016-08-18 | 2017-02-08 | 郭凯 | A municipal sludge deep drying device |
| CN106277705A (en) * | 2016-09-29 | 2017-01-04 | 中冶华天南京工程技术有限公司 | Process and the system of smelting furnace is returned in the direct mummification of pickling mud |
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Application publication date: 20120418 |