CN216890607U - Sludge drying system - Google Patents
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- CN216890607U CN216890607U CN202220471974.8U CN202220471974U CN216890607U CN 216890607 U CN216890607 U CN 216890607U CN 202220471974 U CN202220471974 U CN 202220471974U CN 216890607 U CN216890607 U CN 216890607U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The application discloses sludge drying system relates to sewage treatment technical field. A sludge drying system comprises: the first drying device and the second drying device; the first drying device is provided with a first feeding hole, a first discharging hole, a first heating gas inlet and a first waste gas outlet; the second drying device comprises a drying part and a first heating part, the drying part is provided with a second feeding hole, a second discharging hole, a first circulating gas inlet and a first circulating gas outlet, and the first heating part is provided with a first waste gas inlet, a second waste gas outlet, a second circulating gas inlet and a second circulating gas outlet; the first discharge hole is connected with the second feed inlet; the first waste gas outlet is connected with the first waste gas inlet; the first circulating gas outlet is connected with the second circulating gas inlet, and the second circulating gas outlet is connected with the first circulating gas inlet. The problem of two segmentation sludge treatment processes cause the energy waste can be solved at least to this application.
Description
Technical Field
The application belongs to the technical field of sewage treatment, and particularly relates to a sludge drying system.
Background
Sludge is a byproduct of sewage treatment, contains toxic and harmful substances, and needs to be subjected to stabilization, reduction and harmless treatment. Currently, a heat drying treatment method is mostly adopted to reduce the dehydrated sludge, and the method adopts a two-stage sludge reduction process to meet the requirements of large-scale treatment and higher dehydration performance.
However, in the two-stage sludge treatment process, each stage of the treatment process adopts a separate heat source for heating, so that the energy consumption is increased, and the energy waste is caused.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application aims to provide a sludge drying system, which can at least solve the problem of energy waste caused by a two-stage sludge treatment process.
In order to solve the technical problem, the present application is implemented as follows:
the embodiment of the application provides a sludge drying system, and this sludge drying system includes: a first drying device and a second drying device;
the first drying device is provided with a first feeding hole, a first discharging hole, a first heating gas inlet and a first waste gas outlet;
the second drying device comprises a drying part and a first heating part, the drying part is provided with a second feeding hole, a second discharging hole, a first circulating gas inlet and a first circulating gas outlet, and the first heating part is provided with a first waste gas inlet, a second waste gas outlet, a second circulating gas inlet and a second circulating gas outlet;
the first feed port is used for receiving sludge to be dried, the first discharge port is connected with the second feed port, and the second discharge port is used for discharging dried sludge;
the first heating gas inlet is used for receiving heating gas, the first waste gas outlet is connected with the first waste gas inlet, and the second waste gas outlet is used for discharging waste gas after heat exchange;
the first circulating gas outlet is connected with the second circulating gas inlet, and the second circulating gas outlet is connected with the first circulating gas inlet.
In the embodiment of the application, the first drying device can be used for drying the sludge for the first time so as to reduce the water content of the sludge, and the second drying device can be used for drying the sludge for the second time so as to further realize dehydration and reduce the water content; the waste gas with higher temperature is generated from the sludge in the process of drying the sludge by the first drying device, and the waste gas with higher temperature is introduced into the first heating part of the second drying device, so that the gas generated in the drying part can be reheated, the temperature of the gas is raised, the raised gas flows back to the drying part again to heat the sludge in the drying part, and the heat in the waste gas can be recycled. Therefore, the heat in the waste gas generated in the first drying treatment process is fully utilized, the circulating gas subjected to the second drying treatment is heated, additional heat supplement is not needed, the heat in the waste gas can be effectively utilized, the waste of the heat in the waste gas is avoided, and the purpose of saving energy is achieved.
Drawings
FIG. 1 is a schematic view of a sludge drying system disclosed in an embodiment of the present application;
FIG. 2 is a schematic view of a first drying apparatus disclosed in an embodiment of the present application;
FIG. 3 is a schematic view of a second drying device and a slitting device disclosed in the embodiments of the present application;
fig. 4 is a schematic diagram of a first cooling unit, a cooling water circulation device, a first heating unit, a second cooling unit, a drying condensed water tank, an exhaust gas treatment device, and other components disclosed in the embodiment of the present application.
Description of reference numerals:
10-a first drying device;
11-a housing; 111-a first cavity; 112-a second cavity; 113-a first feed port; 114-a first discharge port; 115 — a first exhaust gas outlet; 116-a first heated gas inlet; 1161-a first inlet unit; 1162-a second inlet unit; 117-first drain; 1171-a first drain unit; 1172-a second drain outlet unit;
12-a main shaft; 121-a hollow cavity; 13-a disk; 14-a variable frequency motor;
20-a second drying device;
21-a drying means; 211-a third cavity; 2111-a second feed port; 2112-second discharge port; 2113 — first recycle gas inlet; 2114-first recycle gas outlet; 212-a first conveyor belt; 213-a second conveyor belt;
22-a first heating member; 221-a first exhaust gas inlet; 222-a second exhaust gas outlet; 223-a second recycle gas inlet; 224-a second recycle gas outlet;
23-a second heating member; 231-third recycle gas inlet; 232-third recycle gas outlet; 233-a second heated gas inlet; 234-a second drain opening;
31-a first cooling member; 311-a fourth recycle gas inlet; 312-a fourth recycle gas outlet; 313 — a first cooling water inlet; 314-first cooling water outlet; 315-third drain opening;
32-a second cooling member; 321-a second exhaust gas inlet; 322-third waste gas outlet; 323-second cooling water inlet; 324-a second cooling water outlet; 325-a fourth water outlet;
40-a cooling water circulation device;
50-an exhaust gas treatment device; 51-a deodorizing mechanism; 52-exhaust fan; 53-chimney;
60-a waste treatment unit; 61-a discharge mechanism; 611-third feed port; 612-a third discharge hole; 613-third cooling water inlet; 614-third cooling water outlet; 62-a slag bin;
71-steam condensate tank; 72-drying the condensed water tank;
81-storage bin; 82-cache bins; 83-a material conveying device; 84-a slitting device;
90-a boiler;
100-sewage treatment plant.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 1 to 4, an embodiment of the application discloses a sludge drying system for drying sludge as a byproduct of sewage treatment. The sludge drying system comprises a first drying device 10 and a second drying device 20, and secondary drying of sludge can be realized through the first drying device 10 and the second drying device 20 so as to dehydrate the sludge. Alternatively, the first drying device 10 may be a disc dryer, which can reduce the water content of the sludge to 55% to 65%; the second drying device 20 may be a belt dryer, which may reduce the water content of the sludge to 20% to 30%.
The first drying device 10 has a first feeding hole 113, a first discharging hole 114, a first heating gas inlet 116, and a first waste gas outlet 115, wherein the first feeding hole 113 is used for receiving sludge to be dried. In some embodiments, the first feeding port 113 is connected to an outlet of the storage bin 81 to provide the sludge to the first drying device 10 through the storage bin 81. In addition, a conveying mechanism may be disposed between the first drying device 10 and the storage bin 81, so as to convey the sludge in the storage bin 81 to the first drying device 10 through the conveying mechanism. Alternatively, the conveying mechanism may be a conveyor belt mechanism.
The first discharge port 114 is used for outputting the sludge subjected to the first drying process, so that the sludge is discharged out of the first drying device 10. The first heated gas inlet 116 is used for receiving heated gas, so as to exchange heat with the sludge in the first drying device 10 through the heated gas, thereby heating and dehydrating the sludge. In some embodiments, the first heating gas inlet 116 may be connected to a steam outlet of the boiler 90, so as to introduce the steam generated by the boiler 90 into the first drying apparatus 10 to supply heat. Optionally, the steam may be saturated steam, and the saturated steam is subjected to heat exchange and temperature reduction to generate condensed water.
The second drying device 20 comprises a drying part 21 and a first heating part 22, the drying part 21 is used for carrying out second drying treatment on the sludge, and the first heating part 22 plays a role in heating. Alternatively, the drying part 21 may be a drying cabinet, and the first heating part 22 may be a heater.
Wherein the drying part 21 has a second inlet 2111, a second outlet 2112, a first circulation gas inlet 2113, and a first circulation gas outlet 2114, and the first heating part 22 has a first exhaust gas inlet 221, a second exhaust gas outlet 222, a second circulation gas inlet 223, and a second circulation gas outlet 224.
In order to convey the sludge subjected to the first drying treatment in the first drying device 10 to the second drying device 20, the first discharge port 114 may be connected to the second feed port 2111, so that the sludge enters the drying part 21 through the first discharge port 114 and the second feed port 2111, and the second drying treatment is performed in the drying part 21. After the sludge is dried for the second time in the drying part 21, the dried sludge can be discharged through the second discharge port 2112. In addition, the discharged sludge can be collected to prevent the sludge from being discharged to cause pollution.
Mud carries out the mummification treatment process for the second time in drying unit 21, mud is heated and can produces gas, in order to make full use of the heat in the waste gas that first mummification process produced, the gas that can also make high temperature waste gas and second mummification process produce carries out the heat transfer in first heating part 22, thereby realize heating the gas that the second mummification process produced, then gas after will heating lets in again to drying unit 21 in to mud heat the dehydration, thereby can realize the circulation flow of gas, and the heat in the make full use of waste gas.
In view of the above, the first exhaust gas outlet 115 is connected to the first exhaust gas inlet 221 of the first heating member 22, so that the high-temperature exhaust gas is introduced into the first heating member 22, and the low-temperature exhaust gas after heat exchange is discharged through the second exhaust gas outlet 222. In addition, the exhaust gas discharged from the second exhaust gas outlet 222 may be collected or treated to prevent the exhaust gas from polluting the environment.
The first recycle gas outlet 2114 is connected to the second recycle gas inlet 223, so that the hot gas (including recycle gas and evaporation waste gas) generated after drying the sludge in the drying part 21 is introduced into the first heating part 22 to realize heat exchange, thereby heating the gas. The second circulation gas outlet 224 is connected with the first circulation gas inlet 2113, so that the gas heated by the first heating part 22 is introduced into the drying part 21 again, the sludge is heated by the gas, the sludge is dehydrated, and the gas is recycled.
Based on the setting, the sludge can be dried for the first time through the first drying device 10 to reduce the water content of the sludge, and the sludge can be dried for the second time through the second drying device 20 to further realize dehydration; in the process of drying the sludge by the first drying device 10, waste gas with higher temperature is generated from the sludge, and the waste gas with higher temperature is introduced into the first heating part 22 of the second drying device 20, so that the gas generated in the drying part 21 can be reheated to raise the temperature of the gas, and the heated gas flows back to the drying part 21 again to heat the sludge in the drying part, so that the cyclic heating can be realized, and thus, in the process of gas circulation, the waste gas with higher temperature and the gas output by the drying part 21 can exchange heat through the first heating part 22, so that the temperature of the gas is raised. Therefore, the heat in the waste gas generated in the first drying treatment process is fully utilized, the gas used in the second drying treatment is heated, additional heat supplement is not needed, the heat can be effectively utilized, the waste of the heat in the waste gas is avoided, and the purpose of saving energy is achieved.
Referring to fig. 1 and 2, in some embodiments, the first drying device 10 is a disk dryer including a housing 11, a spindle 12, and a disk 13. The shell 11 is provided with a first cavity 111, the spindle 12 is at least partially arranged in the first cavity 111 and can rotate relative to the shell 11, the disk 13 is connected to the spindle 12 and is positioned in the first cavity 111, and the first feed port 113, the first discharge port 114 and the first waste gas outlet 115 are all communicated with the first cavity 111; the housing 11 further has a second cavity 112 disposed outside the first cavity 111, the first heated gas inlet 116 includes a first inlet unit 1161 disposed on the housing 11, and the first inlet unit 1161 is communicated with the second cavity 112; the main shaft 12 has a hollow cavity 121 axially disposed along itself, and the first heated gas inlet 116 further includes a second inlet unit 1162 opened on the main shaft 12, wherein the second inlet unit 1162 is communicated with the hollow cavity 121. It should be noted here that, in order to introduce the heating gas into the second cavity 112 and the middle cavity 121 respectively, the first heating gas inlet 116 in the embodiment of the present application may be divided into the first inlet unit 1161 and the second inlet unit 1162, so that the heating gas may be distributed to the second cavity 112 and the middle cavity 121, thereby heating the sludge in the first cavity 111 from the inside and the outside respectively, so as to improve the dewatering efficiency, and further improve the drying efficiency.
The water content of the sludge to be treated is 80-85%, and the water content of the sludge treated by the disc drier is 55-65%, so that the problem of low sludge treatment efficiency in treating a viscous zone can be effectively solved, the drying treatment efficiency can be improved, and the energy consumption can be reduced.
In order to rotate the main shaft 12, one end of the main shaft 12 can extend out of the first cavity 111 and is in transmission connection with the variable frequency motor 14 so as to drive the main shaft 12 to rotate through the variable frequency motor 14; at the same time, the disk 13 is rotated by the main shaft 12, so that the sludge is crushed and pushed to move by the disk 13. Optionally, the surface of the disk 13 may be provided with scrapers, by which the crushing effect can be further improved.
In order to improve the efficiency of the first drying treatment, a plurality of first heating gas inlets 116 may be provided on the housing 11, so that the second chamber 112 increases the amount of the heating gas introduced, thereby improving the heating drying efficiency. In addition, the hollow cavity 121 of the spindle 12 may be supplied with heated air through the first heated air inlet 116.
In order to further improve the drying efficiency, the disk 13 may further have a third cavity, that is, the disk 13 is a hollow structure, and the third cavity is communicated with the hollow cavity 121, so that the heated gas introduced into the hollow cavity 121 may enter the third cavity, so that the disk 13 has a relatively high temperature. Therefore, the heating area of the sludge can be increased to improve the drying efficiency.
During the first drying treatment, the sludge in the first chamber 111 is heated to generate waste gas (i.e., waste steam) with a higher temperature, and the waste gas is discharged through the first waste gas outlet 115, so that the heat can be fully utilized for subsequent use, thereby reducing energy consumption.
Referring to fig. 1 and 4, in order to increase the temperature of the gas entering the drying part 21, the second drying device 20 may further include a second heating part 23, and the gas entering the drying part 21 may be heated for a second time by the second heating part 23, so that the temperature of the gas may be increased.
In some embodiments, the second heating member 23 has a third recycle gas inlet 231, a third recycle gas outlet 232, and a second heated gas inlet 233, wherein the third recycle gas inlet 231 is connected to the second recycle gas outlet 224, the third recycle gas outlet 232 is connected to the first recycle gas inlet 2113, and the second heated gas inlet 233 is configured to receive heated gas.
The gas heated by the first heating member 22 enters the second heating member 23 through the second circulating gas outlet 224 and the third circulating gas inlet 231 to be heated for the second time, so as to heat the gas, the gas after the second heating enters the drying part 21 through the third circulating gas outlet 232 and the first circulating gas inlet 2113 to heat and dehydrate the sludge in the drying part 21, and the gas after heat exchange and the steam generated by the evaporation of the moisture in the sludge are discharged through the first circulating gas outlet 2114, and enter the first heating element 22 for primary heating (i.e. preheating), so that the circulating flow of the gas is realized, thereby realizing the cyclic heating of the sludge, and absorbing the heat from the waste gas and the heat of the heated gas in the process of gas cyclic flow so as to heat the circulating gas and facilitate the dehydration of the sludge.
It should be noted that both first heating member 22 and second heating member 23 may be heat exchange type heaters, and their specific structures and heating principles may refer to related technologies, which are not described herein again.
Referring to fig. 1, 2 and 4, in some embodiments, the heating gas is saturated steam, and the saturated steam forms condensed water after being cooled, so that the first drying device 10 forms the condensed water after performing primary drying treatment on the sludge, and the second heating element 23 heats the circulating gas, so that the introduced saturated steam forms the condensed water. Alternatively, the pressure of the saturated steam may be 0.4 to 0.8 MPa.
In order to discharge the condensed water, the first drying device 10 further has a first water discharge port 117, and the condensed water generated in one drying process can be discharged through the first water discharge port 117, so as to prevent the condensed water from accumulating in the first drying device 10. In some embodiments, the first drain 117 may include a first drain unit 1171 and a second drain unit 1172. The first water discharge port unit 1171 is arranged in the housing 11 of the first drying device 10, and the first water discharge port unit 1171 is communicated with the second cavity 112, so that condensed water formed by cooling saturated steam in the second cavity 112 is discharged conveniently; the second water outlet unit 1172 is disposed on the main shaft 12 of the first drying device 10, and the second water outlet unit 1172 is communicated with the hollow cavity 121, so as to discharge condensed water formed by cooling the saturated steam in the hollow cavity 121.
In order to discharge the condensed water formed in the second heating member 23, the second heating member 23 may have a second drain port 234 to discharge the condensed water through the second drain port 234, thereby preventing the condensed water from being accumulated in the second heating member 23.
In order to collect the condensed water, the sludge drying system may further include a steam condensation water tank 71, and the first drain port unit 1171, the second drain port unit 1172, and the second drain port 234 are all connected to the steam condensation water tank 71 to collect the condensed water formed by each of the first drying device 10 and the second heating member 23, so as to prevent the condensed water from being discharged in a mess.
Referring to fig. 1 and 4, in order to reduce the water content in the circulating gas, the sludge drying system may further include a first cooling unit 31, and the circulating gas may be cooled by the first cooling unit 31, so that part of the steam in the circulating gas may be condensed, and the water content of the circulating gas may be reduced. In some embodiments, the first cooling part 31 is disposed between the drying part 21 and the first heating part 22. Alternatively, the first cooling member 31 may be a cooler. It should be noted here that, the specific structure of the first cooling component 31 and the working principle thereof can also refer to the related art, and are not described herein again.
In order to realize cooling, the sludge drying system may further include a cooling water circulation device 40, and the cooling water circulation device 40 provides a cooling effect for the first cooling part 31 and carries away heat, so as to achieve an effect of cooling the circulating gas.
In some embodiments, the first cooling part 31 has a fourth circulation gas inlet 311, a fourth circulation gas outlet 312, a first cooling water inlet 313, a first cooling water outlet 314, and a third water discharge opening 315. The fourth circulating gas inlet 311 is connected to the first circulating gas outlet 2114, the fourth circulating gas outlet 312 is connected to the second circulating gas inlet 223, the first cooling water inlet 313 and the first cooling water outlet 314 are both connected to the cooling water circulation device 40, and the third drain 315 is used for being connected to the drying condensed water tank 72.
In addition, in order to treat the dried condensed water, an outlet of the dried condensed water tank 72 may be connected to the sewage treatment device 100 to treat the dried condensed water to prevent the dried condensed water from polluting the environment.
In order to extract the dried condensate, a water pump may be connected between the dried condensate tank 72 and the sewage treatment device 100 to provide a pumping power.
Based on the above arrangement, the gas with high temperature and high humidity is generated in the secondary drying process, and the gas enters the first cooling part 31 through the first circulating gas outlet 2114 and the fourth circulating gas inlet 311, and after heat exchange and cooling are performed in the first cooling part 31, the gas enters the first heating part 22 through the fourth circulating gas outlet 312 and the second circulating gas inlet 223, so that the gas is heated by the first heating part 22. Meanwhile, the cooling water circulation device 40 introduces cooling water into the first cooling part 31 through the first cooling water inlet 313, and makes the cooling water exchange heat with the high-temperature and high-humidity gas in the first cooling part 31 to realize the cooling effect on the gas, so that part of steam in the gas is changed into condensed water, and the water content of the gas is reduced; and the cooling water after heat exchange is returned to the cooling water circulation device 40 again through the first cooling water outlet 314.
The condensed water formed after the temperature reduction of the high-temperature and high-humidity gas flows into the drying condensed water tank 72 through the third water outlet 315 for collection, so as to prevent pollution caused by the random discharge of the condensed water generated by drying.
The embodiment of the application utilizes the cooling water to dehydrate the high-temperature and high-humidity gas generated by the second drying device 20, so that the dehydration amount of the gas is improved, and the water carrying amount of the gas is reduced.
Referring to fig. 1 and 4, in order to cool the exhaust gas, the sludge drying system may further include a second cooling unit 32, and the cooling effect on the exhaust gas is achieved by the second cooling unit 32. Alternatively, the second cooling member 32 may be a cooler. It should be noted that, the specific structure of the second cooling component 32 and the working principle thereof can also refer to the related art, and are not described herein again.
In addition, considering that the emission of waste gas can cause pollution, the sludge drying system can further comprise a waste gas treatment device 50, so that the waste gas is treated by the waste gas treatment device 50, and the emission after treatment can reduce harmful substances in the waste gas, thereby achieving the effect of environmental protection.
In addition, the cooling capacity and the temperature reduction effect can be provided to the second cooling part 32 through the cooling water circulation device 40. It should be noted that, the specific structure of the cooling water circulation device 40 and the operation principle thereof can also refer to the related art, and are not described herein again.
In some embodiments, the second cooling member 32 has a second waste gas inlet 321, a third waste gas outlet 322, a second cooling water inlet 323, a second cooling water outlet 324, and a fourth water outlet 325. The second exhaust gas inlet 321 is connected to the second exhaust gas outlet 222, the third exhaust gas outlet 322 is used for discharging cooled exhaust gas (optionally, the third exhaust gas outlet 322 may be connected to the exhaust gas treatment device 50), the second cooling water inlet 323 and the second cooling water outlet 324 are both connected to the cooling water circulation device 40, and the fourth water outlet 325 is used for being connected to the drying condensed water tank 72.
Based on the above arrangement, the exhaust gas after heat exchange by the first heating member 22 enters the second cooling member 32 through the second exhaust gas outlet 222 and the second exhaust gas inlet 321, and after heat exchange and cooling in the second cooling member 32, is discharged through the third exhaust gas outlet 322 and enters the exhaust gas treatment device 50 for treatment, so as to remove harmful substances in the exhaust gas. Meanwhile, the cooling water circulation device 40 introduces cooling water into the second cooling part 32 through the second cooling water inlet 323, and makes the cooling water and the waste gas in the second cooling part 32 exchange heat to realize the cooling effect on the waste gas, and part of steam in the waste gas becomes condensed water, so that the moisture content of the waste gas can be reduced; and the cooling water after heat exchange is returned to the cooling water circulation device 40 again through the second cooling water outlet 324.
In the heat exchange process, the condensed water formed by cooling part of the steam in the waste gas flows into the drying condensed water tank 72 through the fourth water outlet 325 to be collected, so as to prevent the pollution caused by the disordered discharge of the condensed water.
The embodiment of the present application utilizes the second cooling component 32 to condense and dehydrate the exhaust gas in an indirect heat exchange manner, so that the processing pressure of the rear-end exhaust gas processing device 50 can be reduced.
Referring to fig. 1, to treat the exhaust gas, the sludge drying system may further include an exhaust gas treatment device 50, and in some embodiments, the exhaust gas treatment device 50 may include a deodorizing mechanism 51, an exhaust fan 52, and a stack 53. Wherein, the inlet of the deodorization mechanism 51 is connected with the second exhaust gas outlet 222, the outlet of the deodorization mechanism 51 is connected with the inlet of the exhaust fan 52, and the outlet of the exhaust fan 52 is connected with the chimney 53. It should be noted that, the specific structure of the deodorizing mechanism 51 and the working principle thereof can also refer to the related art, and are not described herein again.
After the exhaust gas passes through the second cooling part 32, part of the gas is condensed to form condensed water, the rest of the non-condensable gas enters the deodorization mechanism 51 under the action of the exhaust fan 52 to be treated, so as to remove the odor in the non-condensable gas, such as hydrogen sulfide, ammonia gas, other organic gases, and the like, so as to ensure that the exhaust gas does not pollute the environment, and the exhaust gas after the deodorization treatment is discharged through the chimney 53.
In order to prevent the sludge from being transported too fast or too slow between the first drying device 10 and the second drying device 20, and thus cause sludge accumulation or insufficient supply, the sludge drying system may further include a buffer bin 82, the buffer bin 82 is disposed between the first drying device 10 and the second drying device 20, an inlet of the buffer bin 82 is connected to the first discharge port 114, and an outlet of the buffer bin 82 is connected to the second feed port 2111.
Based on the above arrangement, the sludge discharged from the first drying device 10 can be buffered by the buffer bin 82, so that the feeding speed of the second drying device 20 can be adapted to prevent the sludge from accumulating or being short of supply.
In order to transmit the sludge between the first drying device 10 and the second drying device 20, the sludge drying system may further include a material transfer device 83, the material transfer device 83 is disposed between the first drying device 10 and the second drying device 20, a feeding end of the material transfer device 83 is disposed corresponding to the first discharging port 114, and a discharging end of the material transfer device 83 is disposed corresponding to the second feeding end.
Based on the above arrangement, the sludge output from the first discharge port 114 can be conveyed to the second feed port 2111 through the material conveying device 83, so that the sludge can enter the drying part 21 through the second feed port 2111 for the secondary drying treatment.
Alternatively, the material conveying device 83 may be a conveyor belt mechanism, and the conveyor belt mechanism is located below the first discharge port 114 to receive the sludge output by the first discharge port 114; the discharge end of the conveying belt mechanism is located above the second feed port 2111, so that the sludge can be picked and dropped to the second feed port 2111, and enters the drying part 21 through the second feed port 2111 for secondary drying treatment.
In some embodiments, a material transfer device 83 may be further disposed between the buffer bin 82 and the second drying device 20 to transfer the sludge buffered in the buffer bin 82 to the drying part 21 of the second drying device 20 for performing a secondary drying process.
In order to improve the drying efficiency of the sludge, the sludge subjected to primary drying can be subjected to slitting forming treatment, and the sludge subjected to slitting forming is distributed in the drying part 21, so that the contact area with circulating gas in the drying part 21 is increased, the secondary drying efficiency can be improved, and the dust amount generated in the secondary drying treatment process can be reduced to a certain extent. It should be noted that, other related technologies may also be referred to in the manner of reducing the amount of dust generated during the secondary drying process.
The slitting device 84 may be disposed between the first drying device 10 and the second drying device 20, a feeding end of the slitting device 84 is disposed corresponding to the first discharging port 114, and a discharging end of the slitting device 84 is disposed corresponding to the second feeding port 2111. It should be noted that, for the specific structure of the slitting device 84 and the working principle thereof, reference may also be made to the related art, and details are not described herein.
In some embodiments, the slitting device 84 may be disposed at the second feeding port 2111, and the discharging end of the material conveying device 83 is located above the slitting device 84, so that the conveyed sludge may drop to the feeding end of the slitting device 84, and the sludge after being slit and formed by the slitting device 84 enters the drying component 21 through the second feeding port 2111 for secondary drying treatment.
Referring to fig. 1 and 4, in order to treat the dried sludge, the sludge drying system may further include a waste treatment device 60. The waste treatment device 60 comprises a discharge mechanism 61 and a slag bin 62, wherein the discharge mechanism 61 is provided with a third feed port 611 and a third discharge port 612, the third feed port 611 is connected with the second discharge port 2112, and the third discharge port 612 is connected with the slag bin 62. So, can transmit the mud after the mummification to sediment storehouse 62 through discharge mechanism 61 to the mud after the mummification is stored through sediment storehouse 62, in order to prevent that the mud after the mummification is in disorder arranged and influence the environment.
Considering that the sludge after the secondary drying has a certain temperature, the discharging mechanism 61 can also have a cooling function in order to prevent smoldering risk caused by the overhigh temperature of the sludge. In some embodiments, the discharging mechanism 61 has a third cooling water inlet 613 and a third cooling water outlet 614, and the third cooling water inlet 613 and the third cooling water outlet 614 are both connected to the cooling water circulation device 40. Based on this, can let in discharge mechanism 61 with cooling water through cooling water circulating device 40 to make the cooling water after the heat transfer return cooling water circulating device 40, thereby can make the heat of the mud after the mummification take away by the cooling water, in order to reach the cooling effect. Alternatively, the discharging mechanism 61 may be provided with a cooling water pipe, and the third cooling water inlet 613 and the third cooling water outlet 614 are connected to both ends of the cooling water pipe, respectively, to introduce cooling water into the cooling water pipe.
Referring to fig. 1 and 3, in some embodiments, the drying part 21 may include a third cavity 211, a first conveyor belt 212 and a second conveyor belt 213, wherein the first conveyor belt 212 and the second conveyor belt 213 are both disposed in the third cavity 211, and the first conveyor belt 212 and the second conveyor belt 213 are spaced apart in the first direction. It should be noted here that the first direction is an upward or downward direction during normal use of the drying part 21.
In order to receive the sludge entering from the second inlet 2111 through the first conveyor 212, the second inlet 2111 may be provided to correspond to at least a portion of the first conveyor 212. Optionally, during normal use of the drying section 21, the first conveyor belt 212 is positioned below the second feed opening 2111 to receive incoming sludge.
In order to allow the sludge on the first conveyor belt 212 to fall onto the second conveyor belt 213, the discharge end of the first conveyor belt 212 may be disposed corresponding to at least a portion of the second conveyor belt 213. Optionally, during the normal use of the drying unit 21, the discharge end of the first conveyor belt 212 may be located above the second conveyor belt 213, so that the sludge can fall from the first conveyor belt 212 onto the second conveyor belt 213, and the moving drying process of the sludge is realized.
In order to enable the sludge transferred by the second conveyor 213 to be discharged from the second discharge port 2112, the discharge end of the second conveyor 213 may be close to the second discharge port 2112, so that the sludge transferred by the second conveyor 213 may be dropped to the second discharge port 2112 for discharge. Alternatively, the second discharge port 2112 may be disposed below, or forwardly below, the discharge end of the second conveyor 213 during normal use of the drying section 21, so as to discharge the dropped sludge through the second discharge port 2112.
To sum up, two segmentation sludge drying can be realized to the sludge treatment system in this application embodiment, effectively utilize waste gas waste heat, reduce the saturated steam consumption, alleviate the problem that "viscous zone" sludge treatment is inefficient, reduce the exhaust emission of mummification process, and can realize the steady operation of system.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A sludge drying system is characterized by comprising: a first drying device (10) and a second drying device (20);
the first drying device (10) is provided with a first feeding hole (113), a first discharging hole (114), a first heating gas inlet (116) and a first waste gas outlet (115);
the second drying device (20) comprises a drying part (21) and a first heating part (22), the drying part (21) is provided with a second feeding hole (2111), a second discharging hole (2112), a first circulating gas inlet (2113) and a first circulating gas outlet (2114), and the first heating part (22) is provided with a first waste gas inlet (221), a second waste gas outlet (222), a second circulating gas inlet (223) and a second circulating gas outlet (224);
the first feeding hole (113) is used for receiving sludge to be dried, the first discharging hole (114) is connected with the second feeding hole (2111), and the second discharging hole (2112) is used for discharging dried sludge;
the first heating gas inlet (116) is used for receiving heating gas, the first waste gas outlet (115) is connected with the first waste gas inlet (221), and the second waste gas outlet (222) is used for discharging waste gas after heat exchange;
the first recycle gas outlet (2114) is connected to the second recycle gas inlet (223), and the second recycle gas outlet (224) is connected to the first recycle gas inlet (2113).
2. The sludge drying system according to claim 1, wherein the first drying device (10) is a disc dryer, the disc dryer comprising a housing (11), a spindle (12) and a disc (13);
the shell (11) is provided with a first cavity (111), the spindle (12) is at least partially arranged in the first cavity (111) and can rotate relative to the shell (11), the disc (13) is connected to the spindle (12) and is positioned in the first cavity (111), and the first feeding hole (113), the first discharging hole (114) and the first waste gas outlet (115) are communicated with the first cavity (111);
the shell (11) is also provided with a second cavity (112) arranged outside the first cavity (111), the first heating gas inlet (116) comprises a first inlet unit (1161) arranged on the shell (11), and the first inlet unit (1161) is communicated with the second cavity (112);
the main shaft (12) is provided with a hollow cavity (121) which is arranged along the axial direction of the main shaft, the first heating gas inlet (116) further comprises a second inlet unit (1162) which is arranged on the main shaft (12), and the second inlet unit (1162) is communicated with the hollow cavity (121).
3. Sludge drying system according to claim 1, wherein the second drying means (20) further comprises a second heating member (23);
the second heating member (23) has a third circulating gas inlet (231), a third circulating gas outlet (232), and a second heating gas inlet (233);
the third recycle gas inlet (231) is connected to the second recycle gas outlet (224), the third recycle gas outlet (232) is connected to the first recycle gas inlet (2113), and the second heated gas inlet (233) is for receiving heated gas.
4. The sludge drying system according to any one of claims 1 to 3, wherein the heating gas is saturated steam;
the first drying device (10) is further provided with a first water outlet (117), the first water outlet (117) comprises a first water outlet unit (1171) and a second water outlet unit (1172), the first water outlet unit (1171) is arranged on the shell (11) of the first drying device (10), and the second water outlet unit (1172) is arranged on the spindle (12) of the first drying device (10);
the second drying device (20) comprises a second heating member (23), and the second heating member (23) is provided with a second water discharge port (234);
the sludge drying system further comprises a steam condensation water tank (71), and the first water discharge port unit (1171), the second water discharge port unit (1172) and the second water discharge port (234) are connected with the steam condensation water tank (71).
5. The sludge drying system of claim 1, further comprising a first cooling component (31) and a cooling water circulation device (40);
the first cooling part (31) is provided with a fourth circulating gas inlet (311), a fourth circulating gas outlet (312), a first cooling water inlet (313), a first cooling water outlet (314) and a third water outlet (315);
the fourth circulating gas inlet (311) is connected with the first circulating gas outlet (2114), the fourth circulating gas outlet (312) is connected with the second circulating gas inlet (223), the first cooling water inlet (313) and the first cooling water outlet (314) are connected with the cooling water circulating device (40), and the third water outlet (315) is used for being connected with the drying condensed water tank (72).
6. The sludge drying system of claim 1, further comprising a second cooling component (32) and a cooling water circulation device (40);
the second cooling part (32) is provided with a second waste gas inlet (321), a third waste gas outlet (322), a second cooling water inlet (323), a second cooling water outlet (324) and a fourth water outlet (325);
the second waste gas inlet (321) is connected with the second waste gas outlet (222), the third waste gas outlet (322) is used for discharging cooled waste gas, the second cooling water inlet (323) and the second cooling water outlet (324) are connected with the cooling water circulating device (40), and the fourth water outlet (325) is used for being connected with the drying water tank (72).
7. The sludge drying system of claim 1 or 6, further comprising an exhaust gas treatment device (50);
the waste gas treatment device (50) comprises a deodorization mechanism (51), an exhaust fan (52) and a chimney (53), wherein an inlet of the deodorization mechanism (51) is connected with the second waste gas outlet (222), an outlet of the deodorization mechanism (51) is connected with an inlet of the exhaust fan (52), and an outlet of the exhaust fan (52) is connected with the chimney (53).
8. The sludge drying system according to claim 1, further comprising a buffer storage bin (82), wherein the buffer storage bin (82) is disposed between the first drying device (10) and the second drying device (20), an inlet of the buffer storage bin (82) is connected to the first discharge port (114), and an outlet of the buffer storage bin (82) is connected to the second feed port (2111);
and/or the sludge drying system further comprises a material conveying device (83), the material conveying device (83) is arranged between the first drying device (10) and the second drying device (20), a feeding end of the material conveying device (83) is arranged corresponding to the first discharging port (114), and a discharging end of the material conveying device (83) is arranged corresponding to the second feeding port (2111);
and/or, the sludge drying system still includes slitting device (84), slitting device (84) set up in first mummification device (10) with between second mummification device (20), the pan feeding end of slitting device (84) with first discharge gate (114) correspond the setting, the discharge end of slitting device (84) with second feed inlet (2111) correspond the setting.
9. The sludge drying system of claim 1, further comprising a waste treatment device (60) and a cooling water circulation device (40);
the waste treatment device (60) comprises a discharge mechanism (61) and a slag bin (62), wherein the discharge mechanism (61) is provided with a third feed port (611), a third discharge port (612), a third cooling water inlet (613) and a third cooling water outlet (614), the third feed port (611) is connected with the second discharge port (2112), the third discharge port (612) is connected with the slag bin (62), and the third cooling water inlet (613) and the third cooling water outlet (614) are connected with the cooling water circulating device (40).
10. The sludge drying system of claim 1, wherein the drying section (21) comprises a third chamber (211), a first conveyor belt (212) and a second conveyor belt (213);
the first conveyor belt (212) and the second conveyor belt (213) are both arranged in the third cavity (211), and the first conveyor belt (212) and the second conveyor belt (213) are arranged at intervals along a first direction;
the second feeding hole (2111) is arranged corresponding to at least part of the first conveyor belt (212), the discharging end of the first conveyor belt (212) is arranged corresponding to at least part of the second conveyor belt (213), and the discharging end of the second conveyor belt (213) is close to the second discharging hole (2112).
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| CN202220471974.8U CN216890607U (en) | 2022-03-03 | 2022-03-03 | Sludge drying system |
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| CN202220471974.8U CN216890607U (en) | 2022-03-03 | 2022-03-03 | Sludge drying system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115231799A (en) * | 2022-07-20 | 2022-10-25 | 嘉戎技术(北京)有限公司 | Sludge drying device |
| CN115321786A (en) * | 2022-09-16 | 2022-11-11 | 滨州市生态环境服务中心 | Sludge waste gas comprehensive treatment system |
-
2022
- 2022-03-03 CN CN202220471974.8U patent/CN216890607U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115231799A (en) * | 2022-07-20 | 2022-10-25 | 嘉戎技术(北京)有限公司 | Sludge drying device |
| CN115321786A (en) * | 2022-09-16 | 2022-11-11 | 滨州市生态环境服务中心 | Sludge waste gas comprehensive treatment system |
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