CN203048755U - Steam heat-cycling sludge drying system - Google Patents
Steam heat-cycling sludge drying system Download PDFInfo
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- CN203048755U CN203048755U CN 201220690892 CN201220690892U CN203048755U CN 203048755 U CN203048755 U CN 203048755U CN 201220690892 CN201220690892 CN 201220690892 CN 201220690892 U CN201220690892 U CN 201220690892U CN 203048755 U CN203048755 U CN 203048755U
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- mud
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Abstract
The utility model relates to a steam heat-cycling sludge drying system which comprises a preheated feeding device, a regulating and purifying device, a process cycle gas recycling device, a drying device and a cooling and discharging device, wherein the drying device comprises an evaporation chamber and a drying chamber which are connected sequentially; the sludge outlet of the preheated feeding device is connected with the sludge inlet of the drying device; the condensate outlet of the preheated feeding device is connected with the condensate inlet of the regulating and purifying device; the condensate outlet of the cooling and discharging device is connected with the condensate inlet of the preheated feeding device; the recycled steam outlet of the drying device is connected with the steam inlet of the process cycle gas recycling device; and the drying device is provided with a heat source gas inlet which is connected with the steam outlet of the process cycle gas recycling device through a heat source pipeline. The steam heat-cycling sludge drying system is used for recycling and utilizing the heat value generated by the steam, and has the characteristics of being high in evaporation efficiency, low in cost and low in energy consumption.
Description
Technical field
The utility model relates to a kind of anhydration system of the water-containing sludge that produces for sewage treatment process, belongs to the field of device for dehydrating sladge waste.
Background technology
Along with country in recent years continues to increase the environment protection dynamics, water environment treatment obtains important achievement, and water treatment rate and compliance rate constantly promote.But all kinds of mud that water treatment procedure produces have formed new environmental problem.
Mud is the solid precipitation material that produces in the sewage treatment process, comprises the comparatively approaching sedimentable matter of physical properties that produces in the Industrial processes in addition, and the mud of sludge treatment indication mainly is the biochemical sludge that sewage treatment process produces.At present sewage disposal department common configuration the mechanical dehydration device, biochemical sludge dehydration back water ratio is still up to 80-85%.These mud are because bulky, easily corrupt, stacking and storing has bigger environmental risk, and in November, 2010, Chinese Ministry of Environmental Protection sent " about strengthening the notice of urban wastewater treatment firm mud prevention and cure of pollution work ", and sludge disposal becomes the problem of pendulum before each sewage disposal unit plane.
Sludge drying is an important technology in the Sludge Disposal Techniques route.The difficult problem of sludge disposal is to reduce water ratio, and the dehydrated sludge water ratio is reduced to 30% from 80%, and total amount reduces 71%, and sludge drying is the most direct method of mud decrement, and the product behind the sludge drying has also been created condition for carbonization, the utilization of resources.
Carry out Sludge Disposal Techniques research abroad early, Sludge Disposal Techniques has had nearly 40 years exploration and practice in Japan and American-European countries, all kinds of sludge treatment technology of present domestic appearance, and major part comes from abroad.
Sludge drying technique is one of gordian technique for the treatment of sludge as the important method of mud decrement, but the general cost of investment of sludge drying device that enters Chinese market is high, and existing sludge drying device generally adopts the technology of similar Chemical Industry Drying equipment, do not carry out the technology setting that cuts down the consumption of energy, running cost and energy consumption have exceeded sustainability of enterprises, and too high energy consumption does not meet the requirement of China's energy-saving and emission-reduction yet.These characteristics have largely limited the application of sludge drying technique.
In the face of the demand in domestic sludge treatment market, the exploitation less energy-consumption, homemade sludge drying system is very urgent cheaply.The main flow drying sludge technology representative of existing domestic market has belt drying (amber, SAVAR), fluidised bed drying (An Deli thatch), two-part drying (it is full to get profit), thin layer formula drying (VOMM, BUSS), oar blade type drying (ball is red, chats, Yue Dao), disc type drying (Mitsubishi, domestic part producer).In the operational path that these producers provide, do not consider the energy recovery measure at present, overall hear rate is higher, and working cost is high.The mud that will wet evaporates 1 kg of water, needs to consume 650-900 kilocalorie heat, 0.03-0.2 degree electricity, and the 10-30kg water of condensation is pressed energy equivalent conversion comprehensive energy consumption 2.8-4.6MJ/kg vaporize water.
Wherein adopt circulation technology gas except the thin layer formula is dry, the water vapour that evaporates is circulated, process gas is through dedusting, intensification, and it is wet for carrying that major part is got back to moisture eliminator, and process gas is told bypass and carried out the dehumidification by condensation operation.Because major part is water vapor in the recycle gas, exhausted air quantity and the needed water of condensation of condensation operation that total system produces are less.The water vapour that the drying sludge process produces is not utilized.
Other dry technology does not adopt circulation technology gas, directly suction air enters moisture eliminator, take away the moisture of mud, the steam that drying process produces and inhaled air discharge after by condensation cleaning, the gas that the air mixed mud that this class technology is introduced gives out, after producing a large amount of recirculated cooling water condensation cooling of a large amount of foul smell consumption, deodorizing is handled.The water vapour that the drying sludge process produces is not utilized.
The utility model content
For solving the deficiency of above technology, the purpose of this utility model provides a kind of steam heat circulating sludge anhydration system, and purpose is the high energy consumption that solves device at present, expensive, the shortcoming of not considering energy recovery.
The technical solution of the utility model is: a kind of steam heat circulating sludge anhydration system, comprise the preheated feed device, regulate refining plant, technological cycle gas reclamation set, desiccation apparatus and cooling discharge device, described desiccation apparatus comprises successively mud being carried out drying and take away the kiln of the water vapor that mud evaporates based on the evaporator room of indirect heat exchange with superheated vapour of connecting, the sludge outlet of described preheated feed device connects the mud import of described desiccation apparatus, the lime set outlet of described preheated feed device connects the lime set import of described adjusting refining plant, the lime set outlet of described cooling discharge device connects the lime set import of described preheated feed device, the recovered steam outlet of described desiccation apparatus connects the steam inlet of technological cycle gas reclamation set, described desiccation apparatus is provided with the thermal source gas feed, and the thermal source gas feed of described desiccation apparatus is by the vapour outlet of the described technological cycle gas of thermal source pipe connection reclamation set.
Described system can also be provided with and replenish the steam-pipe that steam uses and the vacuum gooster pump that is used for forming the certain vacuum degree in described desiccation apparatus, described steam-pipe can replenish valve by steam and insert the thermal source pipeline or directly insert described desiccation apparatus by the additional valve of steam, described desiccation apparatus inside can be provided with agitator and scraper plate, the feed end of described evaporator room can be provided with the heat-exchanger rig that carries out indirect heat exchange for mud and steam, can be provided with the drying chamber that allows steam and mud directly to contact in the described kiln.
Described technological cycle gas reclamation set can be made up of the dust removing units, filtering unit, mechanically compress unit and the allocation units that connect successively, the recovered steam outlet of described desiccation apparatus is by the steam inlet of pipe connection dust removing units, described allocation units vapour outlet is by a pipeline or respectively by kiln and the evaporator room of the described desiccation apparatus of different pipe connection, described allocation units are provided with the control device that enters evaporator room and kiln thermal source gas ratio for distribution.
The lime set outlet of described desiccation apparatus can be connected with the lime set import of described preheated feed device by pipeline, and described preheated feed device is preferably total closed type, and inside can be provided with heat-exchanger rig.
The sludge outlet of described desiccation apparatus can be connected with the mud import of described cooling discharge device by pipeline, described adjusting refining plant lime set outlet can be connected with the lime set import of described cooling discharge device by pipeline.
The lime set outlet of described adjusting refining plant can connect the wastewater discharge pipe road.
The sludge outlet of described cooling discharge device can connect the sludge-drying discharge line.
The sludge inlet of described preheated feed device can be provided with the sewage sludge feed pipeline.
That described mechanically compress unit preferably adopts is centrifugal, the device after one or more devices in series in Roots type or the positive displacement vapour compression equipment.
Described preheated feed device can be provided with gas barrier.
The beneficial effects of the utility model are: because adopting process circulation gas reclamation set makes the steam calorific value of the technological cycle gas that desiccation apparatus is discharged be back to desiccation apparatus again, substituted a large amount of fresh heat that evaporation consumes, saved energy consumption, comprehensive energy consumption is saved 65-82% compared to existing technology; Owing to adopt the preheated feed device before drying, wet mud to be carried out thermal pretreatment, when carrying out drying in desiccation apparatus, minimizing steam hangs down the generation surface condensation because of the mud temperature, reduce or avoided condensing in a large number to the interference of technological process because of steam, improve the vaporization efficiency of desiccation apparatus mud ingress, make used heat carry out recycling, improve the overall thermal efficient of desiccation apparatus; Owing to adopt the desiccation apparatus with high evaporation efficient, make the time of mud stop in device shorten, reduce frequent, the low vaporization efficiency that reaches the unsettled influence of heat recuperation and improved sludge water content of heat recovery efficiency of overhaul of the equipments that the mud bonding causes; Because total system adopts totally-enclosed operation, a spot of non-condensable gas can be used for the gas-tight silo sealing gland because of the gas barrier that preheated feed device inside is provided with, and no foul smell discharging reduces the foul smell blowdown presssure; Because desiccation apparatus is made up of evaporator room and kiln, drying process is divided into evaporation and dry two processing steps that carry out continuously, and carry out the evaporation of mud by the mode of steam indirect heating, carry out drying by the mode that steam and mud directly contact, realized the pressure decatizing steam raising environment of mud, improve vaporization efficiency, in kiln, realize the drying process of mud, make the steam the inside after steam after mud and the surface-moisture evaporation that is beneficial to mud after steam fully contacts after the heat exchange is sneaked into heat release, thereby be convenient to realize heat recuperation, particularly this mode has taken full advantage of the variation of mud physical property in continuing drying process, can according to different mud wait by experiment mode optimize the evaporation and drying process in device parameter and processing parameter, to reduce or to avoid fixed and the fouling on heat-transfer surface of mud in drying process, be very easy to operation, and be conducive to prolong the maintenance cycle of equipment, reduce maintenance cost and also increase work efficiency.Experiment according to the applicant, this mode that is divided into above-mentioned two step mummification on the preheating basis with respect to existing common technology, can reduce steam thermal energy consumption and mechanical power consumption significantly, shorten the treatment time, and can improve the mummification degree of outlet mud significantly.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
1, referring to Fig. 1, the utility model provides a kind of steam heat circulating sludge anhydration system, comprises preheated feed device 1, adjusting refining plant 3, technological cycle gas reclamation set, desiccation apparatus 2 and cooling discharge device 4.Desiccation apparatus comprises based on the evaporator room of indirect heat exchange and superheated vapour and mud is carried out drying and take away the kiln of the water vapor that mud evaporates.The lime set outlet of preheated feed device 1 connects the lime set import of regulating refining plant 3, the sludge outlet of preheated feed device 1 connects the mud import of desiccation apparatus 2, regulate refining plant 3 the lime set outlet be connected with the lime set import of cooling off discharge device 4 by pipeline, the lime set outlet of cooling discharge device 4 connects the lime set import of preheated feed device 1, the recovered steam outlet of desiccation apparatus 2 connects the steam inlet of technological cycle gas reclamation set, desiccation apparatus is provided with the thermal source gas feed, and the thermal source gas feed of desiccation apparatus is by the vapour outlet of thermal source pipe connection technological cycle gas reclamation set.
The sludge inlet of preheated feed device 1 is provided with the pipeline for wet sewage sludge feed, this pipeline is the custody transfer space, wet mud pipeline thus enters in the preheated feed device, the steam condensate mud that will wet is preheating to 50-80 degree centigrade, and the lime set import that the lime set that produces after the heat-exchanger rig heat exchange of preheated feed device inside is regulated refining plant 3 by the lime set outlet of preheated feed device 1 through pipe connection enters regulates the refining plant the inside.Regulate the water temperature of refining plant near room temperature, a part is discharged lime set via being connected the wastewater discharge pipe road of regulating refining plant as waste water, another part enters cooling discharge device inside through the supercharging circulation by the lime set outlet of regulating refining plant, carry out heat exchange by the heat-exchanger rig that is positioned at cooling discharge device inside with the comparatively high temps mud of handling and obtain the lower sludge-drying of temperature, sludge-drying is discharged by the sludge-drying discharge line that connects the cooling discharge device, the lime set that is loaded with heat enters the preheated feed device by the lime set outlet of cooling discharge device and as the heat release medium of mud preheating wet mud is carried out preheating, thereby realizes the reuse of used heat.
Wet mud after the preheating of preheated feed device enters desiccation apparatus 2 the insides by the sludge outlet of connection preheated feed device and the mud import of desiccation apparatus, mud uses main thermal source to be technological cycle gas after entering desiccation apparatus, according to actual needs can the small amount of supplemental thermal source or need not supplemental heat source, supplemental heat source is the live steam that steam-pipe produces, be used for keeping the internal system temperature and guarantee steam output, steam-pipe replenishes valve by steam and inserts the thermal source pipeline or directly insert desiccation apparatus by the additional valve of steam.Desiccation apparatus is made up of evaporator room and kiln two portions, mud in evaporator room mainly in the indirect heat exchange mode, mud and steam are isolated mutually and the heat-transfer surface by between the two carries out heat exchange, make heat energy conduct to mud by steam and make water evaporation in the mud, in kiln, mud after superheated vapour and the heat exchange directly contacts and makes wherein moisture evaporation on the drying chamber that is in kiln inside, the steam that evaporation forms is sneaked into the superheated vapour after the heat release, superheated vapour is as the part of technological cycle gas after the steam that mud evaporates and the heat release, and the heat exchange of mud and drying process are carried out under the negative pressure air tight condition successively.This design realizes that desiccation apparatus inside all is pressure decatizing vapour environment, improve vaporization efficiency and make heat exchange and steam that drying sludge produces is all recycled, can not produce the fouling risk, realized essential safety, particularly this mode has taken full advantage of the variation of mud physical property in continuing drying process, can according to different mud wait by experiment mode optimize the evaporation and drying process in device parameter and processing parameter, to reduce or to avoid fixed and the fouling on heat-transfer surface of mud in drying process, be very easy to operation, and be conducive to prolong the maintenance cycle of equipment, reduce maintenance cost and also increase work efficiency.Experiment according to the applicant, this mode that is divided into above-mentioned two step mummification on the preheating basis with respect to existing common technology, can reduce steam thermal energy consumption and mechanical power consumption significantly, shorten the treatment time, and can improve the mummification degree of outlet mud significantly.Desiccation apparatus inside also is provided with agitator and scraper plate, and desiccation apparatus is provided with for the vacuum gooster pump that forms the certain vacuum degree at desiccation apparatus, and the feed end of evaporator room is provided with the heat-exchanger rig for heat exchange.The Sludge Surface water that absorbs heat is vaporized rapidly, and agitator and scraper plate stir the surface of bringing in constant renewal in mud to mud, and Sludge Surface is fully contacted with heat-exchanger rig, improves vaporization efficiency.Vacuum gooster pump is according to the characteristics of wet mud and the pressure that equipment operational monitoring signal is determined device interior, at operating pressure be-during 0.02MPa, the mud temperature-stable is at 95 degrees centigrade, the mud of process heat exchange and drying enters the mud import of cooling off discharge unit by the sludge outlet of desiccation apparatus, and the mud of comparatively high temps enters the cooling discharge device and carries out heat exchange.The lime set that the desiccation apparatus heat transfer process produces is entered in the preheated feed device by the lime set import of desiccation apparatus lime set outlet by the preheated feed device, after the heat-exchanger rig of preheated feed device carries out heat exchange, be used for the preheated feed device in the preheating of wet mud.The mixing steam of the superheated vapour that produces after the desiccation apparatus water vapour that evaporation produces to mud and the heat release is entered in the technological cycle gas reclamation set by the recovered steam outlet that is located thereon portion.Technological cycle gas reclamation set is made up of the dust removing units 5, filtering unit 6, mechanically compress unit 7 and the allocation units 8 that connect successively, interconnect by pipeline between each integral part, the steam that reclaims is entered in dust removing units 5 and the filtering unit 6 by pipeline by the recovered steam outlet of desiccation apparatus, steam is carried out dedusting and filtration, make steam become clean gas after treatment, avoid causing exploding because containing dust in the gas, the risk of fouling etc., keep system stable operation.The clean gas that obtains carries out the compression of gas in pipeline feeds mechanically compress unit 7, steam obtains having the technological cycle gas of movement pressure and temperature after compression, the mechanically compress unit can adopt centrifugal, a kind of in Roots type or the positive displacement vapour compression equipment or dispose the device that the plural serial stage of several equipment forms as required, technological cycle gas enters allocation units 8 through pipeline by machine assembly 7, technological cycle gas after 8 pairs of compressions of allocation units carries out voltage stabilizing, heat up, distribute, the control device that is positioned at allocation units inside is used in the gas ratio of heat exchange and circulation according to the monitor signal branch, distribute the kiln that the gas part of ratio sends desiccation apparatus back to through pipeline and circulate, heat-exchanger rig place and mud that another part is sent to the evaporator room of desiccation apparatus carry out heat exchange.The outlet of two portions technological cycle gas can be by pipeline or two different zones by different pipe connection desiccation apparatus inside respectively, the steam calorific value that this process makes the drying sludge process produce is back to drying process after mechanically compress, substituted a large amount of fresh heat that evaporation consumes.In addition, the totally-enclosed operation of whole device, the gas barrier that preheated feed device inside is provided with makes a spot of non-condensable gas be used for the gas-tight silo sealing gland, no foul smell discharging, thus reduce the foul smell blowdown presssure.
Compare existing all kinds of anhydration system, advantage of the present utility model is:
(1) energy-saving manner of sludge drying is the direct recycling of steam, the utilising efficiency height.
(2) system's resistance to air loss is strong, has only micro-non-condensable gas to discharge, and has reduced the foul smell processing pressure.
(3) systematic entirety is strong, realize the raising of system's efficiency of utilization by integrated configuration, energy-saving effect is outstanding, evaporate 1 kg of water, only need to consume 50-200 kilocalorie heat (theoretical calculation, may not consume) and 0.08-0.2 degree electricity, press energy equivalent conversion energy consumption 0.5-1.6MJ/kg vaporize water, comprehensive energy consumption is compared existing dry technology and is saved 65-82%.
(4) drying plant has comprehensively adopted multiple drying process principle, drying efficiency height.
(5) vapor condensation and mud heating are coupled into a process, have saved water vapour cool-down dehumidification process, reduced the recirculated cooling water consumption.
(6) system finishes on-line monitoring and control by the PLC automatic control system, adjusts operating parameter in real time, and the raising system in the 50-100% load range, keeps system energy consumption fluctuation≤10% to mud adaptability.
(7) the pressure decatizing vapour environment of technological cycle gas is for the high thermal efficiency of vapour compression utilization provides safeguard.
Claims (10)
1. steam heat circulating sludge anhydration system, it is characterized in that comprising the preheated feed device, regulate refining plant, technological cycle gas reclamation set, desiccation apparatus and cooling discharge device, described desiccation apparatus comprises successively mud being carried out drying and take away the kiln of the water vapor that mud evaporates based on the evaporator room of indirect heat exchange with superheated vapour of connecting, the sludge outlet of described preheated feed device connects the mud import of described desiccation apparatus, the lime set outlet of described preheated feed device connects the lime set import of described adjusting refining plant, the lime set outlet of described cooling discharge device connects the lime set import of described preheated feed device, the recovered steam outlet of described desiccation apparatus connects the steam inlet of technological cycle gas reclamation set, described desiccation apparatus is provided with the thermal source gas feed, and the thermal source gas feed of described desiccation apparatus is by the vapour outlet of the described technological cycle gas of thermal source pipe connection reclamation set.
2. steam heat circulating sludge anhydration system as claimed in claim 1, it is characterized in that described desiccation apparatus also is provided with replenishes the steam-pipe that steam uses and the vacuum gooster pump that is used for forming the certain vacuum degree in described desiccation apparatus, described steam-pipe replenishes valve by steam and inserts the thermal source pipeline or directly insert described desiccation apparatus by the additional valve of steam, described desiccation apparatus inside is provided with agitator and scraper plate, the feed end of described evaporator room is provided with the heat-exchanger rig that carries out indirect heat exchange for mud and steam, is provided with the drying chamber that allows steam and mud directly to contact in the described kiln.
3. steam heat circulating sludge anhydration system as claimed in claim 1 or 2, it is characterized in that described technological cycle gas reclamation set is made up of the dust removing units, filtering unit, mechanically compress unit and the allocation units that connect successively, the recovered steam outlet of described desiccation apparatus is by the steam inlet of pipe connection dust removing units, the vapour outlet of described allocation units is by a pipeline or respectively by kiln and the evaporator room of the described desiccation apparatus of different pipe connection, described allocation units are provided with the control device that enters evaporator room and kiln thermal source gas ratio for distribution.
4. steam heat circulating sludge anhydration system as claimed in claim 3, the lime set outlet that it is characterized in that described desiccation apparatus is connected with the lime set import of described preheated feed device by pipeline, described preheated feed device is total closed type, and inside is provided with heat-exchanger rig.
5. steam heat circulating sludge anhydration system as claimed in claim 4, the sludge outlet that it is characterized in that described desiccation apparatus is connected with the mud import of described cooling discharge device by pipeline, described adjusting refining plant lime set outlet be connected with the lime set import of described cooling discharge device by pipeline.
6. steam heat circulating sludge anhydration system as claimed in claim 5 is characterized in that the lime set outlet of described adjusting refining plant connects the wastewater discharge pipe road.
7. steam heat circulating sludge anhydration system as claimed in claim 6 is characterized in that the sludge outlet of described cooling discharge device connects the sludge-drying discharge line.
8. steam heat circulating sludge anhydration system as claimed in claim 7 is characterized in that the sludge inlet of described preheated feed device is provided with the sewage sludge feed pipeline.
9. steam heat circulating sludge anhydration system as claimed in claim 8 is characterized in that the device after described mechanically compress unit adopts one or more devices in series in centrifugal, Roots type or the positive displacement vapour compression equipment.
10. steam heat circulating sludge anhydration system as claimed in claim 9 is characterized in that described preheated feed device is provided with gas barrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220690892 CN203048755U (en) | 2012-12-14 | 2012-12-14 | Steam heat-cycling sludge drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220690892 CN203048755U (en) | 2012-12-14 | 2012-12-14 | Steam heat-cycling sludge drying system |
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| CN203048755U true CN203048755U (en) | 2013-07-10 |
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| CN 201220690892 Expired - Lifetime CN203048755U (en) | 2012-12-14 | 2012-12-14 | Steam heat-cycling sludge drying system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103588375A (en) * | 2013-10-17 | 2014-02-19 | 南京拓骏工程技术有限公司 | MVC (Mechanical Vapor Compression) sludge evaporating and drying system and sludge drying method thereof |
| CN103922557A (en) * | 2014-04-16 | 2014-07-16 | 重庆大学 | Binocular wet sludge drying equipment |
| CN105417919A (en) * | 2015-11-12 | 2016-03-23 | 上海环境卫生工程设计院有限公司 | Sludge indirect heat drying system and drying process thereof |
| CN106495427A (en) * | 2016-12-14 | 2017-03-15 | 南京航空航天大学 | The continuous drying system of MVR superheated steam sludge and method of work |
| CN106966563A (en) * | 2017-04-21 | 2017-07-21 | 句容市百诚活性炭有限公司 | A kind of modified sludge treatment device |
-
2012
- 2012-12-14 CN CN 201220690892 patent/CN203048755U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103588375A (en) * | 2013-10-17 | 2014-02-19 | 南京拓骏工程技术有限公司 | MVC (Mechanical Vapor Compression) sludge evaporating and drying system and sludge drying method thereof |
| CN103588375B (en) * | 2013-10-17 | 2015-08-12 | 南京拓骏工程技术有限公司 | A kind of mud MVC evaporates drying system and dries the method for mud |
| CN103922557A (en) * | 2014-04-16 | 2014-07-16 | 重庆大学 | Binocular wet sludge drying equipment |
| CN105417919A (en) * | 2015-11-12 | 2016-03-23 | 上海环境卫生工程设计院有限公司 | Sludge indirect heat drying system and drying process thereof |
| CN106495427A (en) * | 2016-12-14 | 2017-03-15 | 南京航空航天大学 | The continuous drying system of MVR superheated steam sludge and method of work |
| CN106966563A (en) * | 2017-04-21 | 2017-07-21 | 句容市百诚活性炭有限公司 | A kind of modified sludge treatment device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: China National Petroleum Corp. Patentee after: CHINA KUNLUN CONTRACTING & ENGINEERING Corp. Address before: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee before: China National Petroleum Corp. Patentee before: CHINA KUNLUN CONTRACTING & ENGINEERING Corp. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130710 |