CN220413132U - Municipal sludge drying system - Google Patents
Municipal sludge drying system Download PDFInfo
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- CN220413132U CN220413132U CN202321994325.7U CN202321994325U CN220413132U CN 220413132 U CN220413132 U CN 220413132U CN 202321994325 U CN202321994325 U CN 202321994325U CN 220413132 U CN220413132 U CN 220413132U
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- drying device
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- draft fan
- condenser
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- 239000010802 sludge Substances 0.000 title claims abstract description 81
- 238000001035 drying Methods 0.000 title claims abstract description 59
- 239000004568 cement Substances 0.000 claims abstract description 26
- 239000000428 dust Substances 0.000 claims abstract description 13
- 230000003068 static effect Effects 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000002918 waste heat Substances 0.000 abstract description 14
- 239000002699 waste material Substances 0.000 abstract description 11
- 238000005265 energy consumption Methods 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 238000007791 dehumidification Methods 0.000 abstract description 8
- 238000004064 recycling Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000003750 conditioning effect Effects 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 238000005526 cement kiln firing Methods 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Landscapes
- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
The utility model discloses a municipal sludge drying system which comprises a drying device, cement kiln head hot air, a cyclone dust collector, a cooler and a condenser, wherein the cement kiln head hot air is communicated with the condenser through a pipeline, the condenser is communicated with the drying device through a pipeline, wet sludge is positioned in the drying device, the other end of the drying device is communicated with the cyclone dust collector, the cyclone dust collector is communicated with the cooler through a pipeline, and the cooler is communicated with the condenser through a pipeline to form a closed circulation loop. According to the utility model, the dehumidification heat pump is replaced by introducing waste heat and waste air, so that the energy consumption is greatly reduced, the water content of the sludge is effectively reduced, and the reduction and economical degree of municipal sludge recycling treatment are improved.
Description
Technical Field
The utility model belongs to the technical field of municipal sludge treatment, and particularly relates to a municipal sludge drying system which mainly utilizes waste heat of low-grade cement kiln products to dry sludge.
Background
Municipal sludge is produced by the municipal sewage treatment plant through centrifugal dehydration or simple filter pressing, and directly enters a kiln to cause the influence of the increase of the kiln tail smoke amount, the increase of heat consumption and the like of a cement kiln firing system, and the municipal sludge is deeply dehydrated and further dried, so that the heat value of the sludge can be improved, and the municipal sludge can be used as a substitute fuel of the cement kiln system. In the traditional low-temperature drying treatment process of municipal sludge, the defects of high equipment investment cost, high energy consumption, large occupied area, high maintenance frequency and the like exist, stable and dry hot air generated by a dehumidification heat pump is needed to dry the sludge, a large amount of stable hot air is needed to exchange heat in the process, and the energy consumption of a system is too high.
The utility model patent of China published on 2022-06-28 with the application number of CN202210254217.X provides a sludge drying treatment process of municipal sewage plants, which is characterized by comprising the following steps of: pumping wet sludge with the water content of 80-85% into a conditioning tank through a sludge pump; adding a conditioning agent into the conditioning tank to obtain a sludge agent mixture; introducing the sludge medicament mixture into a filter press for filter pressing and dehydration to obtain primary desiccated sludge; and conveying the primary dried sludge to a sludge dryer through a bolt conveyor for heat drying treatment to obtain dried sludge. The front-end normal-temperature deep dehydration process only needs to dry wet sludge with the water content of more than 80% to the water content of 60-65%, and the adding amount of chemical agents in the process is 35-40% lower than that of the technical scheme of drying the wet sludge to the water content of 50% at one time, so that the influence on the subsequent sludge incineration disposal is effectively reduced. However, the technical solution of the patent still cannot solve the above technical problems.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide the municipal sludge drying system which is simple in structure and convenient to use, and the dehumidification heat pump is replaced by introducing waste heat and waste air, so that the energy consumption is greatly reduced, the water content of sludge is effectively reduced, and the reduction and economical degree of municipal sludge recycling treatment are improved.
In order to achieve the above purpose, the technical scheme of the utility model is as follows: the utility model provides a municipal sludge drying system, includes drying device, cement kiln head hot-blast, cyclone, cooler and condenser, and cement kiln head hot-blast passes through pipeline and condenser intercommunication, and the condenser passes through pipeline and drying device intercommunication, and wet mud is located drying device, and drying device's the other end and cyclone intercommunication, cyclone pass through pipeline and cooler intercommunication, and the cooler passes through pipeline and condenser intercommunication and forms closed circulation circuit.
Further, the drying device comprises a static mixer, a horizontal roller and a roller heat-preserving shell, wet sludge is input into the horizontal roller, the static mixer is connected into the horizontal roller, the static mixer breaks up the wet sludge along with rotation when the horizontal roller rotates, the roller heat-preserving shell is sleeved on the outer part of the horizontal roller, and a cavity is arranged between the inner wall of the roller heat-preserving shell and the outer wall of the horizontal roller.
Further, the upper left end of the horizontal roller is provided with a wet sludge feeding port, the lower right end of the horizontal roller is provided with a dry sludge discharging port, and the roller heat-insulating shell is provided with an air inlet and an air outlet which are communicated with the cavity.
Further, the sludge drying system further comprises a draught fan I and a draught fan II, wherein the draught fan I is arranged between the hot air of the kiln head of the cement kiln and the condenser, the inlet end of the draught fan I is communicated with the hot air of the kiln head of the cement kiln, and the outlet end of the draught fan I is respectively communicated with the condenser and the air inlet of the hollow cavity of the drying device through two-phase parallel pipelines.
Further, the induced draft fan II is arranged between the drying device and the cyclone dust collector, the air outlet of the horizontal roller and the air outlet of the cavity in the drying device are both communicated with the inlet end of the induced draft fan II, and the outlet end of the induced draft fan II is communicated with the cyclone dust collector.
Further, a pipeline for hot air communication between the induced draft fan I and the kiln head of the cement kiln is provided with a wind pressure regulating valve, and a pipeline for the outlet end of the induced draft fan I is provided with an air quantity regulating valve.
The technical scheme of the utility model has the advantages that:
1. according to the utility model, the dehumidification heat pump is replaced by introducing waste heat and waste air, so that the energy consumption is greatly reduced, the water content of the sludge is effectively reduced, and the reduction and economical degree of municipal sludge recycling treatment are improved.
2. According to the utility model, through optimizing the structure of the municipal sludge low-temperature drying device, the horizontal roller and the built-in static mixer structure are adopted to realize uniform distribution of wet sludge, and the waste heat source of the cement kiln is utilized to dehumidify and dry the circulating wet air in the system, so that the purposes of reducing the energy consumption of the system and efficiently and stably drying the municipal sludge are achieved.
Drawings
The utility model is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a schematic diagram of a municipal sludge drying system according to the present utility model;
FIG. 2 is a schematic view of the section 1-1 in FIG. 1.
The labels in the above figures are respectively: 1. kiln head hot air of the cement kiln; 2. a cyclone dust collector; 3. a cooler; 4. a condenser; 5. a draught fan I; 6. an induced draft fan II; 7. a static mixer; 8. a horizontal roller; 81. a wet sludge feed inlet; 82. a dry sludge discharge port; 9. a roller heat-insulating shell; 10. a cavity; 11. a wind pressure regulating valve; 12. an air quantity adjusting valve; 13. roller wheels.
Detailed Description
In the present utility model, it is to be understood that the term "length"; "width"; "go up"; "Down"; "front"; "rear"; "left"; "right"; "vertical"; "horizontal"; "roof"; "bottom", "inner"; "outside"; "clockwise"; "counterclockwise"; "axial"; "planar orientation"; the orientation or positional relationship indicated by "circumferential" or the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description and simplification of description, and is not indicative or implying that the apparatus or element to be referred to must have a specific orientation; constructed and operated in a particular orientation and therefore should not be construed as limiting the utility model.
As shown in fig. 1 and 2, the municipal sludge drying system comprises a drying device, a cement kiln head hot air 1, a cyclone dust collector 2, a cooler 3 and a condenser 4, wherein the cement kiln head hot air 1 is communicated with the condenser 4 through a pipeline, the condenser 4 is communicated with the drying device through a pipeline, wet sludge is positioned in the drying device, the other end of the drying device is communicated with the cyclone dust collector 2, the cyclone dust collector 2 is communicated with the cooler 3 through a pipeline, and the cooler 3 is communicated with the condenser 4 through a pipeline to form a closed circulation loop. According to the utility model, the dehumidification heat pump is replaced by introducing waste heat and waste air, so that the energy consumption is greatly reduced, the water content of the sludge is effectively reduced, and the reduction and economical degree of municipal sludge recycling treatment are improved.
The drying device comprises a static mixer 7, a horizontal roller 8 and a roller heat-insulating shell 9, wet sludge is input into the horizontal roller 8, the static mixer 7 is connected in the horizontal roller 8, the static mixer 7 breaks up the wet sludge along with rotation when the horizontal roller 8 rotates, the roller heat-insulating shell 9 is sleeved outside the horizontal roller 8, and a cavity 10 is arranged between the inner wall of the roller heat-insulating shell 9 and the outer wall of the horizontal roller 8. The upper left end of the horizontal roller 8 is provided with a wet sludge feeding port 81, the lower right end of the horizontal roller 8 is provided with a dry sludge discharging port 81, and the roller heat-preserving shell 9 is provided with an air inlet and an air outlet which are communicated with the cavity 10.
The sludge drying system further comprises an induced draft fan I5 and an induced draft fan II 6, wherein the induced draft fan I5 is arranged between the cement kiln head hot air 1 and the condenser 4, the inlet end of the induced draft fan I5 is communicated with the cement kiln head hot air 1, and the outlet end of the induced draft fan I5 is respectively communicated with the condenser 4 and the air inlet of the cavity 10 in the drying device through two-phase parallel pipelines. A pipeline of the induced draft fan I5 communicated with the hot air 1 at the kiln head of the cement kiln is provided with a wind pressure regulating valve 11, and a pipeline of the outlet end of the induced draft fan I5 is provided with an air quantity regulating valve 12.
The induced draft fan II 6 is arranged between the drying device and the cyclone 2, the air outlet of the horizontal roller 8 and the air outlet of the cavity 10 in the drying device are both communicated with the inlet end of the induced draft fan II 6, and the outlet end of the induced draft fan II 6 is communicated with the cyclone 2.
The drying device further comprises a roller 13, a transmission gear and a driving motor, wherein the roller 13 is fixedly connected with the roller heat-preserving shell 9, the roller 13 is meshed with the transmission gear, the transmission gear is connected with an output shaft of the driving motor, the driving motor works to drive the transmission gear to rotate so as to drive the roller 13 to rotate, meanwhile, the horizontal roller 8 and the static mixer 7 rotate in a following way, the roller heat-preserving shell 9 is fixed on a base device, and in order to prevent interference with a connecting pipeline, the driving motor can be controlled to enable the roller 13 to rotate within a certain range.
According to the utility model, through optimizing the structure of the municipal sludge low-temperature drying device, the horizontal roller and the built-in static mixer structure are adopted to realize uniform distribution of wet sludge, and the waste heat source of the cement kiln is utilized to dehumidify and dry the circulating wet air in the system, so that the purposes of reducing the energy consumption of the system and efficiently and stably drying the municipal sludge are achieved.
The utility model relates to a municipal sludge drying system, which adopts the working principle that:
waste heat and waste air at the temperature of about 120 ℃ of the kiln head of the cement kiln are introduced into a main machine drum shell of the drying device to heat the outside of the drum, and are used as heat exchange heat sources for evaporating wet sludge in the drum to generate wet air; the raw wet sludge is acted by the static mixer in the roller, so that uniform heating can be realized, meanwhile, the wet sludge can be scattered, and the internal heating is more uniform.
The method comprises the steps of introducing wet air generated by evaporation of wet sludge in a horizontal roller of a drying device and internal circulating heating hot air of a roller heat-preserving shell into a cyclone dust collector through a draught fan for dust removal, performing dehumidification heat exchange through a cooler, then entering a condenser for further dehumidification and temperature rise, wherein the heat exchange heat source is waste heat and waste air at the temperature of about 120 ℃ of a kiln head of a cement kiln, finally generating dry air with lower relative humidity and higher temperature by adjusting the air quantity and air pressure of the waste heat and waste air, entering the roller for direct contact with the wet sludge, and generating the dried sludge to be discharged from the tail end of the roller.
The whole set of system of the utility model forms a closed circulation loop, hot air inside the roller and between the roller shell can be intensively and circularly utilized, heat exchange is continuously carried out with waste heat and waste air of kiln head of the cement kiln, and wet sludge can be efficiently and stably dried.
The utility model optimizes the structure of the municipal sludge low-temperature drying device, adopts a horizontal closed roller and is internally provided with a static mixer structure, and wet sludge can be uniformly distributed in the roller. And the waste heat and the waste air of the cement kiln head at about 120 ℃ are cooperatively utilized to dehumidify and exchange heat with the wet air generated by the evaporation of the wet sludge moisture in the roller device, so that the hot dry air circulating in the roller is obtained, and meanwhile, the waste heat and the waste air indirectly heat the outer wall of the roller, so that the sludge drying efficiency is improved. The dehumidification heat pump is replaced by introducing waste heat and waste air, so that the energy consumption is greatly reduced, the water content of the sludge is effectively reduced, and the reduction and economical degree of municipal sludge recycling treatment are improved.
While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the above embodiments, but is capable of being modified in various ways, or of being applied to other applications without modification, without departing from the scope of the utility model.
Claims (6)
1. A municipal sludge drying system which is characterized in that: including drying device, cement kiln hood hot-blast (1), cyclone (2), cooler (3) and condenser (4), cement kiln hood hot-blast (1) is through pipeline and condenser (4) intercommunication, and condenser (4) are through pipeline and drying device intercommunication, and wet mud is located drying device, and drying device's the other end and cyclone (2) intercommunication, cyclone (2) are through pipeline and cooler (3) intercommunication, and cooler (3) are through pipeline and condenser (4) intercommunication formation closed circulation loop.
2. A municipal sludge drying system according to claim 1, wherein: the drying device comprises a static mixer (7), a horizontal roller (8) and a roller heat-preserving shell (9), wet sludge is input into the horizontal roller (8), the static mixer (7) is connected in the horizontal roller (8), the static mixer (7) breaks up the wet sludge along with rotation when the horizontal roller (8) rotates, the roller heat-preserving shell (9) is sleeved outside the horizontal roller (8), and a cavity (10) is formed between the inner wall of the roller heat-preserving shell (9) and the outer wall of the horizontal roller (8).
3. A municipal sludge drying system according to claim 2, wherein: the upper left end of the horizontal roller (8) is provided with a wet sludge feeding hole (81), the lower right end of the horizontal roller (8) is provided with a dry sludge discharging hole (82), and the roller heat-insulating shell (9) is provided with an air inlet and an air outlet which are communicated with the cavity (10).
4. A municipal sludge drying system according to claim 2 or 3, wherein: the sludge drying system further comprises an induced draft fan I (5) and an induced draft fan II (6), wherein the induced draft fan I (5) is arranged between the cement kiln head hot air (1) and the condenser (4), the inlet end of the induced draft fan I (5) is communicated with the cement kiln head hot air (1), and the outlet end of the induced draft fan I (5) is respectively communicated with the condenser (4) and the air inlet of the drying device hollow cavity (10) through two-phase parallel pipelines.
5. The municipal sludge drying system of claim 4 wherein: the induced draft fan II (6) is arranged between the drying device and the cyclone dust collector (2), the air outlet of the horizontal roller (8) and the air outlet of the hollow cavity (10) of the drying device are both communicated with the inlet end of the induced draft fan II (6), and the outlet end of the induced draft fan II (6) is communicated with the cyclone dust collector (2).
6. The municipal sludge drying system of claim 4 wherein: a pipeline for communicating the induced draft fan I (5) with the hot air (1) at the kiln head of the cement kiln is provided with a wind pressure regulating valve (11), and a pipeline for the outlet end of the induced draft fan I (5) is provided with an air quantity regulating valve (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321994325.7U CN220413132U (en) | 2023-07-27 | 2023-07-27 | Municipal sludge drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321994325.7U CN220413132U (en) | 2023-07-27 | 2023-07-27 | Municipal sludge drying system |
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| Publication Number | Publication Date |
|---|---|
| CN220413132U true CN220413132U (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321994325.7U Active CN220413132U (en) | 2023-07-27 | 2023-07-27 | Municipal sludge drying system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116768442A (en) * | 2023-04-28 | 2023-09-19 | 天津水泥工业设计研究院有限公司 | Method and system for cooperatively disposing municipal sludge by cement kiln |
| CN118479708A (en) * | 2024-06-18 | 2024-08-13 | 安徽海螺环保集团有限公司 | A system for drying municipal sludge using waste air from cement kilns in combination with steam |
-
2023
- 2023-07-27 CN CN202321994325.7U patent/CN220413132U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116768442A (en) * | 2023-04-28 | 2023-09-19 | 天津水泥工业设计研究院有限公司 | Method and system for cooperatively disposing municipal sludge by cement kiln |
| CN118479708A (en) * | 2024-06-18 | 2024-08-13 | 安徽海螺环保集团有限公司 | A system for drying municipal sludge using waste air from cement kilns in combination with steam |
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