CN116768442A - Method and system for cooperatively disposing municipal sludge by cement kiln - Google Patents
Method and system for cooperatively disposing municipal sludge by cement kiln Download PDFInfo
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- CN116768442A CN116768442A CN202310485376.5A CN202310485376A CN116768442A CN 116768442 A CN116768442 A CN 116768442A CN 202310485376 A CN202310485376 A CN 202310485376A CN 116768442 A CN116768442 A CN 116768442A
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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
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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Abstract
本发明属于水泥窑协同处置固废技术领域，尤其涉及一种水泥窑协同处置城市污泥的方法及系统，所述水泥窑协同处置城市污泥的方法包括以下步骤：步骤一：将含水率60‑80％的污泥采用间接烘干的方式烘干至含水率≤10％，烘干热源为水泥窑的窑头篦冷机的低温段热风；步骤二：步骤一产生的含水废气通过冷凝后在窑头篦冷机高温段烧掉；步骤一得到的含水率≤10％的污泥经过打散后，送入分解炉烧掉。本发明提供一种水泥窑协同处置城市污泥的方法及系统。
The invention belongs to the technical field of cement kiln collaborative disposal of solid waste, and in particular relates to a method and system for collaborative disposal of urban sludge by a cement kiln. The method for collaborative disposal of urban sludge by a cement kiln includes the following steps: Step 1: Add a moisture content of 60 -80% of the sludge is dried to a moisture content of ≤10% using indirect drying. The drying heat source is the hot air from the low-temperature section of the kiln head grate cooler of the cement kiln; Step 2: The water-containing waste gas generated in Step 1 is condensed It is burned in the high-temperature section of the grate cooler at the kiln head; the sludge with a moisture content of ≤10% obtained in step 1 is broken up and sent to the decomposition furnace for burning. The invention provides a method and system for collaborative disposal of urban sludge in a cement kiln.
Description
Technical Field
The application belongs to the technical field of cement kiln co-treatment of solid waste, and particularly relates to a method and a system for co-treatment of municipal sludge by a cement kiln.
Background
The prior art comprises the following steps:
the municipal sludge has the characteristics of high water content, large volume, easy decay and bad smell, especially has the characteristic of irritating malodor, and also contains a large amount of organic matters, rich nitrogen and phosphorus and other nutrients, heavy metal compounds, parasites and the like, and is easy to cause a large range of secondary pollution if proper volume reduction, stabilization or recycling treatment is not carried out. The water content of sludge discharged from urban sewage treatment plants is about 80 percent after gravity concentration and mechanical dehydration, the volume is huge, the heat value is low, and the sludge is not suitable for aerobic composting, incineration, building material utilization and even landfill. After the sludge is concentrated, the water content of the sludge is further reduced by a physical method, so that the sludge is convenient to transport, accumulate and utilize or further treat. As the state currently promulgates more stringent disposal methods for sludge disposal, landfill and composting of sludge will cause a series of environmental problems, which are soon prohibited. The garbage incineration needs to be newly built and has complex procedures.
The main chemical components of the municipal sludge are aluminosilicate raw materials, about 60% of the sludge dry basis is organic matters, the heat value is 1500-2200Kcal/kg, the remaining 40% is aluminosilicate elements, similar to siliceous raw materials of cement raw materials, the municipal sludge can replace a small part of siliceous raw materials, the heat value in the sludge can save part of fuel consumption, and the characteristics are preconditions for the cooperative treatment of the municipal sludge by a cement kiln. The chemical sludge is different from municipal sludge in that the chemical sludge has less organic matters than municipal sludge, and contains more heavy metal elements, so that the chemical sludge and municipal sludge both meet the requirement of the cement kiln for cooperative treatment, and the basic requirement of cement products is not influenced.
Chinese patent (application No. CN 103896505A) discloses a feeding regulation method for cooperatively disposing lime drying municipal sludge in a cement kiln, wherein lime is used as a dehydrating agent, sludge with water content of 80% is subjected to dewatering treatment until the water content of the sludge is less than 60%, then high-temperature flue gas introduced into part of kiln tail is connected into heat conduction oil to deeply dry the dehydrated sludge, lime drying sludge is obtained, and waste gas generated by drying is burned in a rotary kiln again. This patent has the following problems: firstly, the dried sludge is added into a cement raw material vertical mill to be ground together with the cement raw material, a drying heat source in the vertical mill is from the waste heat of the flue gas at 250-300 ℃ after the waste heat of the kiln tail generates electricity, and at the temperature, a large amount of VOC (volatile organic compounds) can be volatilized from the dried sludge added into the raw material and enter the flue gas, so that a large load is brought to the whole kiln tail flue gas treatment system, measures such as activated carbon adsorption and the like are required to be added, and the environmental protection cost is high. Secondly, if a large amount (18%) of dried sludge added with calcium oxide is added into the decomposing furnace to change the components of the cement raw meal, the problem of uniformity of the raw meal after the dried sludge is added is difficult to solve due to the homogenization effect of the decomposing furnace, the final calcium oxide content of the cement clinker is affected, and even excessive free calcium oxide is generated, so that the performance index of the cement product is seriously affected. The conduction oil drying system increases the investment cost and the problem of poor operation stability. Thirdly, a large amount of water vapor contained in the waste gas containing odor in the drying process directly enters the rotary kiln to burn off, so that the stability of primary air of the kiln head is affected, and a large amount of water vapor enters the kiln to increase the burning heat consumption.
Chinese patent (application number CN 115353271A) discloses a municipal sludge vacuum dehydration treatment system utilizing low-grade waste heat of a cement kiln, municipal sludge with water content of 60% -65% is dehydrated to 30% by utilizing waste heat of 80-110 ℃ discharged from a cement kiln production line, and the dehydrated municipal sludge can be used as a substitute fuel to be cooperatively treated in the cement kiln, so that the production quality of clinker is not affected, and the firing heat consumption is reduced. The temperature of the waste gas used by the method is lower than 80-110 ℃, and the temperature of the waste gas is reduced to be within 50 ℃ under the condition that a cement kiln is used for grinding raw materials, so that the drying efficiency of sludge under vacuum is seriously affected. Meanwhile, the patent does not mention the treatment mode of the odor-containing waste gas in the sludge drying process, and the odor-containing waste gas sucked away under the vacuum is also required to be treated.
Chinese patent (application number CN 209397113U) discloses a cement kiln sludge drying apparatus, which comprises an indirect drying device, a direct drying device and a conveying pipeline. The indirect drying device is connected with the direct drying device through a conveying pipeline, and the direct drying device is used for receiving the sludge output by the indirect drying device and enabling the sludge to be in contact with the high-temperature flue gas of the cement kiln to realize drying. The patent is to send the sludge with the water content of 65% -75% output by the indirect drying device into a direct dryer to be dried in direct contact with high-temperature flue gas, so that the waste flue gas containing a large amount of volatile odor needs to be treated.
In summary, (1) the existing direct drying method has the disadvantages of bad smell threshold problem and high waste gas treatment cost caused by direct contact of the flue gas with the sludge. (2) In the existing indirect drying method, waste heat of a cement kiln is used as a heat source to heat conduction oil, steam and the like as heat mediums, and then the heat mediums are sent into a heat exchange device to conduct forced convection heat transfer with wet sludge. (3) The existing method is to add a large amount of dehydrating agent calcium oxide into sludge, then press-filter and dehydrate, and then directly dry, the method firstly cannot solve the waste gas problem generated in the drying process and brings adverse factors to the cement raw material components due to the large amount of calcium oxide, and finally the performance index of cement clinker is seriously affected. Therefore, how to reduce the municipal sludge from 80% to 20% by a reasonable, economical, safe and environment-friendly drying process technology is a current urgent problem to be solved.
Difficulty and meaning for solving the technical problems:
therefore, based on the problems, the method and the system for cooperatively disposing the municipal sludge by the cement kiln have important practical values.
Disclosure of Invention
The application aims to provide a method and a system for cooperatively disposing municipal sludge by a cement kiln for solving the technical problems in the prior art.
The technical scheme adopted by the embodiment of the application for solving the technical problems in the prior art is as follows:
a method of co-disposing of municipal sludge in a cement kiln, the method of co-disposing of municipal sludge in a cement kiln comprising the steps of:
step one: the sludge with the water content of 60-80% is dried in an indirect drying mode until the water content is less than or equal to 10%, and the drying heat source is the low temperature Duan Refeng of a kiln head grate cooler of the cement kiln;
step two:
the water-containing waste gas generated in the first step is burnt out in a high-temperature section of the kiln head grate cooler after being condensed;
the sludge with the water content less than or equal to 10 percent obtained in the step one is sent into a decomposing furnace to be burnt after being scattered.
The embodiment of the application can also adopt the following technical scheme:
in the method for co-disposing municipal sludge in the cement kiln, further, the indirect drying in the first step is as follows: and introducing the kiln head grate cooler low temperature Duan Refeng into an indirect dryer to dry the sludge, and returning the low temperature hot air subjected to indirect drying and heat exchange to the kiln head grate cooler again for circulation.
The clinker is cooled to obtain heating quantity, and circulation is formed between the indirect drying equipment and the grate cooler.
In the method for co-disposing municipal sludge by using the cement kiln, further, the temperature of the kiln head grate cooler low temperature Duan Refeng in the first step is 300-450 ℃, and the temperature of indirect drying is 250-300 ℃.
In the method for cooperatively disposing the municipal sludge in the cement kiln, further, the sludge in the first step is sent to a sludge feeding box through a pumping pipeline and then fed into indirect drying equipment;
and in the second step, the sludge discharged from the scattering machine is conveyed to a decomposing furnace at the tail of the kiln by dry sludge conveying equipment for incineration treatment, and the temperature of the decomposing furnace is more than or equal to 850 ℃.
In the method for cooperatively disposing municipal sludge in the cement kiln, further, the sludge is any one of municipal sludge, municipal sludge and chemical sludge.
In the method for cooperatively disposing the municipal sludge by the cement kiln, further, the temperature of the high-temperature section of the kiln head grate cooler in the step two is more than or equal to 900 ℃.
In the method for cooperatively disposing municipal sludge in the cement kiln, further, the water obtained by condensation in the second step is introduced into a humidifying tower after passing through a water treatment system.
The condensed wastewater enters a sewage treatment system for treatment and then is supplied to a humidifying tower of a mud factory for use.
A system for co-processing municipal sludge by a cement kiln, which is characterized in that: the system for co-disposal of municipal sludge by a cement kiln for use in the method for co-disposal of municipal sludge by a cement kiln according to any one of the above, the system for co-disposal of municipal sludge by a cement kiln comprising: the device comprises a sludge pumping system, a sludge feeding device, an indirect drying device, a scattering machine, a dry sludge conveying device, a decomposing furnace and a rotary kiln which are sequentially connected, wherein a kiln head grate cooler connected with the rotary kiln is connected with the indirect drying machine to provide hot air for the indirect drying machine, a condensing system, a water treatment system and a humidifying tower are sequentially connected, and the condensing system is connected with the kiln head grate cooler.
In the system for cooperatively disposing the municipal sludge by the cement kiln, further, the aspect ratio of the intermediate drying equipment is less than or equal to 10, the rotating speed is 15r/min, and the pressure of a flue gas inlet is more than or equal to 500Pa; the sludge feeding equipment is a sludge feeding box, the indirect drying equipment is an indirect dryer, and the dry sludge conveying equipment is a lifter.
One or more technical solutions provided in the embodiments of the present application have at least the following beneficial effects:
1. because the urban sludge is dried at 100-300 ℃ and a large amount of harmful gas components such as odorous gas, VOC, dioxin and the like are volatilized, the problem of overflowing of the harmful components is difficult to prevent by using a common direct drying process, and the problem of environmental protection emission is involved. Therefore, the application uses the flue gas indirect circulation drying process, so that the organic volatile irritant substances in the municipal sludge are volatilized independently under the condition of indirect drying, and the kiln head is used for drying by hot air circulation, thereby reducing the generation of a large amount of flue gas by direct drying. And (3) sending the dried sludge into a decomposing furnace for incineration treatment, and carrying out innocent treatment on the dried sludge at the temperature of above 850 ℃ and providing partial heat energy. The indirectly dried waste gas is sent to the high temperature section of the grate cooler to burn after condensation, thus solving the problems of overflow of volatile odor and safety and environmental protection. The condensed wastewater can be treated and then supplied with water by a humidifying tower. The application not only makes harmless use of the urban sludge solid waste, but also reduces the harm to the environment, and has better social benefit and environmental benefit.
2. The application adopts a low-temperature indirect circulation drying process, uses the waste heat circulation drying of the low-temperature section of the grate cooler, and solves the problem that the volatile VOC in the sludge enters the kiln tail smoke to cause the discharge system of the cement kiln smoke. Meanwhile, the indirect drying equipment can rotate, has the effects of lifting materials and improving heat exchange, and enables organic volatile irritant substances in the municipal sludge to volatilize independently under the condition of isolating air.
3. Different from the prior art that kiln tail hot air is adopted, the kiln tail hot air needs to enter a flue gas treatment system for treatment after being utilized, the kiln tail hot air of a cement kiln system needs to be used for waste heat cement raw materials of a preheater system, then enters a dust removal system after being preheated by a C1 outlet, and is discharged after reaching standards, if the system is doped with volatile VOC, the environmental protection cost is increased, and the environmental protection requirement is not met. The kiln head low-temperature hot air (300-450 ℃) is used for drying in a circulating way, so that a large amount of smoke generated by direct drying is reduced, the environmental-friendly disposal cost is reduced, the low-temperature calcination waste heat circulating drying by using the grate cooler does not generate the technical problems of increasing the environmental-friendly cost, not meeting the environmental-friendly requirement and the like.
4. The incineration treatment of the application mainly burns sludge with the water content lower than 10% in the indirect circulation drying process, and solves the problems of unstable working conditions of a decomposing furnace caused by higher water content of the sludge and unstable working conditions caused by spraying the sludge with high water content from the kiln tail in the prior art.
5. The application sends the odor-containing waste flue gas volatilized from the sludge in the indirect dryer into the condensing system, and the odor-containing waste gas from the condensing system is sent into the high-temperature section of the grate cooler at 900 ℃ to be burnt, so that the problems of the discharge and overflow of the odor-containing waste gas are effectively solved, the condensed sewage is supplied to a humidifying tower of a mud plant for use, and the water is saved.
6. The application adopts the grate cooler to burn out at a high temperature section, which is different from the rotary kiln in the prior art, because the waste gas generated by drying sludge has larger quantity and contains more water vapor, the waste gas is sent into the kiln to burn out, which can cause unstable working conditions in the kiln, influence the stability of primary air of the coal injection pipe at the kiln head, and especially greatly increase energy consumption loss due to the water vapor in the waste gas. And the high temperature Duan Da of the grate cooler for producing the silicate cement is 900 ℃, and volatile organic compounds in the waste gas can be burnt.
7. The application adopts the waste heat (300-450 ℃) of the low-temperature section of the grate cooler to circularly dry the municipal sludge in the indirect drying process, the generated water-containing waste gas is sent into the high-temperature section of the grate cooler to burn off after being condensed, the emission of volatile VOC is solved, the waste water after being treated can be used for supplying water to a humidifying tower, the water resource is saved, the normal production of cement is not influenced by the cyclic drying, and the hidden danger of heat exchange of a high-pressure boiler and the like are avoided.
Drawings
The technical solution of the embodiments of the present application will be described in further detail below with reference to the accompanying drawings, but it should be understood that these drawings are designed for the purpose of illustration only and thus are not limiting of the scope of the present application. Moreover, unless specifically indicated otherwise, the drawings are intended to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.
FIG. 1 shows a schematic process flow diagram of a first embodiment;
Detailed Description
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Example 1
The embodiment comprises the following steps:
step one: the sludge with the water content of 60-80% is dried in an indirect drying mode until the water content is less than or equal to 10%, and the drying heat source is the low temperature Duan Refeng of a kiln head grate cooler of the cement kiln;
step two:
the water-containing waste gas generated in the first step is burnt out in a high-temperature section of the kiln head grate cooler after being condensed;
the sludge with the water content less than or equal to 10 percent obtained in the step one is sent into a decomposing furnace to be burnt after being scattered.
Example 2
On the basis of the first embodiment, the sludge is any one of municipal sludge, municipal sludge and chemical sludge.
The indirect drying in the first step is as follows: and introducing the kiln head grate cooler low temperature Duan Refeng into an indirect dryer to dry the sludge, and returning the low temperature hot air subjected to indirect drying and heat exchange to the kiln head grate cooler again for circulation. The clinker is cooled to obtain heating quantity, and circulation is formed between the indirect drying equipment and the grate cooler.
The temperature of the kiln head grate cooler in the first step is 300-450 ℃ and the temperature of indirect drying is 250-300 ℃. In the first step, the sludge is sent to a sludge feed box through a pumping pipeline and then fed into indirect drying equipment; and in the second step, the sludge discharged from the scattering machine is conveyed to a decomposing furnace at the tail of the kiln by dry sludge conveying equipment for incineration treatment, and the temperature of the decomposing furnace is more than or equal to 850 ℃. The dried sludge is sent into a decomposing furnace for incineration treatment, and at the temperature of above 850 ℃, the dried sludge is subjected to innocent treatment, the generation of dioxin is stopped, and partial heat energy supplement is provided.
The temperature of the high-temperature section of the kiln head grate cooler in the second step is more than or equal to 900 ℃. And (3) enabling the water obtained through condensation in the second step to enter a humidifying tower after passing through a water treatment system. The condensed wastewater enters a sewage treatment system for treatment and then is supplied to a humidifying tower of a mud factory for use.
Example 3
The embodiment comprises a sludge pumping system, a sludge feeding device, an indirect dryer, a decomposing furnace, a rotary kiln, a grate cooler, a condensing system, a water treatment system, a dry sludge conveying system and the like.
The system for co-disposing municipal sludge by a cement kiln comprises: the device comprises a sludge pumping system, a sludge feeding device, an indirect drying device, a scattering machine, a dry sludge conveying device, a decomposing furnace and a rotary kiln which are sequentially connected, wherein a kiln head grate cooler connected with the rotary kiln is connected with the indirect drying machine to provide hot air for the indirect drying machine, a condensing system, a water treatment system and a humidifying tower are sequentially connected, and the condensing system is connected with the kiln head grate cooler.
The length-diameter ratio of the intermediate drying equipment is less than or equal to 10, the rotating speed is 15r/min, and the pressure of a flue gas inlet is more than or equal to 500Pa; the sludge feeding equipment is a sludge feeding box, the indirect drying equipment is an indirect dryer, and the dry sludge conveying equipment is a lifter.
The working process comprises the following steps: firstly, delivering sludge with the water content of 60-80% to a sludge feed box through a pumping pipeline, then feeding the sludge into indirect drying equipment, drying at the temperature of 250-300 ℃, delivering the sludge into a crusher for crushing until the water content is less than or equal to 10%, delivering the sludge into a decomposing furnace at the tail of a kiln for incineration treatment through a lifter, and delivering the sludge into the decomposing furnace at the temperature of more than or equal to 850 ℃. And introducing hot air at 300-450 ℃ of a low-temperature section of the kiln head grate cooler into an indirect dryer to dry the sludge, returning the low-temperature hot air subjected to indirect drying heat exchange into the grate cooler again to cool clinker to obtain heating quantity, and forming circulation between indirect drying equipment and the grate cooler, wherein the length-diameter ratio of the drying equipment is less than or equal to 10, the rotating speed is 15r/min, and the flue gas inlet pressure is more than or equal to 500Pa. The waste flue gas containing odor, which is volatilized by sludge in the indirect dryer, is sent to a condensing system, the odor-containing waste gas from the condensing system is sent to a high-temperature section of 900 ℃ of a grate cooler to be burnt, and the condensed waste water is sent to a humidifying tower of a cement plant to be used after being treated by a sewage treatment system.
In summary, the application provides a method and a system for cooperatively disposing municipal sludge by a cement kiln.
The foregoing examples illustrate the application in detail, but are merely preferred embodiments of the application and are not to be construed as limiting the scope of the application. All equivalent changes and modifications within the scope of the present application are intended to be covered by the present application.
Claims (9)
1. A method for cooperatively disposing municipal sludge by a cement kiln is characterized in that: the method for cooperatively disposing the municipal sludge by the cement kiln comprises the following steps:
step one: the sludge with the water content of 60-80% is dried in an indirect drying mode until the water content is less than or equal to 10%, and the drying heat source is the low temperature Duan Refeng of a kiln head grate cooler of the cement kiln;
step two:
the water-containing waste gas generated in the first step is burnt out in a high-temperature section of the kiln head grate cooler after being condensed;
the sludge with the water content less than or equal to 10 percent obtained in the step one is sent into a decomposing furnace to be burnt after being scattered.
2. The method for co-disposal of municipal sludge by a cement kiln according to claim 1, wherein: the indirect drying in the first step is as follows: and introducing the kiln head grate cooler low temperature Duan Refeng into an indirect dryer to dry the sludge, and returning the low temperature hot air subjected to indirect drying and heat exchange to the kiln head grate cooler again for circulation.
3. The method for co-disposal of municipal sludge by a cement kiln according to claim 2, wherein: the temperature of the kiln head grate cooler in the first step is 300-450 ℃ and the temperature of indirect drying is 250-300 ℃.
4. The method for co-disposal of municipal sludge by a cement kiln according to claim 1, wherein: in the first step, the sludge is sent to a sludge feed box through a pumping pipeline and then fed into indirect drying equipment;
and in the second step, the sludge discharged from the scattering machine is conveyed to a decomposing furnace at the tail of the kiln by dry sludge conveying equipment for incineration treatment, and the temperature of the decomposing furnace is more than or equal to 850 ℃.
5. The method for co-disposal of municipal sludge by a cement kiln according to claim 4, wherein: the sludge is any one of municipal sludge, municipal sludge and chemical sludge.
6. The method for co-disposal of municipal sludge by a cement kiln according to claim 1, wherein: the temperature of the high-temperature section of the kiln head grate cooler in the second step is more than or equal to 900 ℃.
7. The method for co-disposal of municipal sludge by a cement kiln according to claim 1, wherein: and (3) enabling the water obtained through condensation in the second step to enter a humidifying tower after passing through a water treatment system.
8. A system for co-processing municipal sludge by a cement kiln, which is characterized in that: the system for co-disposal of municipal sludge by a cement kiln for use in the method for co-disposal of municipal sludge by a cement kiln according to any one of claims 1 to 7, the system for co-disposal of municipal sludge by a cement kiln comprising: the device comprises a sludge pumping system, a sludge feeding device, an indirect drying device, a scattering machine, a dry sludge conveying device, a decomposing furnace and a rotary kiln which are sequentially connected, wherein a kiln head grate cooler connected with the rotary kiln is connected with the indirect drying machine to provide hot air for the indirect drying machine, a condensing system, a water treatment system and a humidifying tower are sequentially connected, and the condensing system is connected with the kiln head grate cooler.
9. The system for co-disposal of municipal sludge by cement kiln according to claim 8, wherein: the length-diameter ratio of the intermediate drying equipment is less than or equal to 10, the rotating speed is 15r/min, and the pressure of a flue gas inlet is more than or equal to 500Pa; the sludge feeding equipment is a sludge feeding box, the indirect drying equipment is an indirect dryer, and the dry sludge conveying equipment is a lifter.
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| CN202310485376.5A CN116768442A (en) | 2023-04-28 | 2023-04-28 | Method and system for cooperatively disposing municipal sludge by cement kiln |
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|---|---|---|---|---|
| CN209397113U (en) * | 2019-01-02 | 2019-09-17 | 北京建都设计研究院有限责任公司 | A kind of cement kiln sludge drying device |
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| CN220413132U (en) * | 2023-07-27 | 2024-01-30 | 安徽海螺环保集团有限公司 | Municipal sludge drying system |
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| CN209397113U (en) * | 2019-01-02 | 2019-09-17 | 北京建都设计研究院有限责任公司 | A kind of cement kiln sludge drying device |
| CN212581744U (en) * | 2020-05-29 | 2021-02-23 | 南京凯盛开能环保能源有限公司 | Cement kiln co-processing sludge system containing pretreatment device |
| CN115286208A (en) * | 2022-08-25 | 2022-11-04 | 华新水泥股份有限公司 | System and method for drying and co-processing sludge by using waste heat of cement kiln |
| CN220413132U (en) * | 2023-07-27 | 2024-01-30 | 安徽海螺环保集团有限公司 | Municipal sludge drying system |
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