CN112919772A - Sludge thermal modification drying system - Google Patents
Sludge thermal modification drying system Download PDFInfo
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- CN112919772A CN112919772A CN202110136255.0A CN202110136255A CN112919772A CN 112919772 A CN112919772 A CN 112919772A CN 202110136255 A CN202110136255 A CN 202110136255A CN 112919772 A CN112919772 A CN 112919772A
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- gas
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- thermal modification
- grinding
- sludge
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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
-
- 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
Abstract
A sludge thermal modification drying system comprises: the gas grinding device comprises a thermal modification section and a grinding section communicated with the thermal modification section; a hopper; the crushing device is connected with the hopper and the thermal modification section of the gas grinding device and is used for crushing the mud cakes conveyed from the hopper and conveying the crushed mud powder to the thermal modification section; the compressed gas generating device is respectively communicated with the thermal modification section and the grinding section through a normal-temperature gas conveying pipeline of a heated gas conveying pipeline machine, a gas heating device is arranged on the heated gas conveying pipeline and used for heating the compressed gas entering the thermal modification section, and the mud powder enters the grinding section for further grinding after the thermal modification section is thermally modified to be unconnected by the heated compressed gas; an induced draft fan; the cyclone separation device comprises a flour grinding section and a draught fan; the water-gas separation device is connected with the induced draft fan and the compressed gas generation device; the draught fan guides the mud powder to enter the cyclone separation device for solid, liquid and gas three-phase separation.
Description
Technical Field
The application relates to the technical field of sludge drying, in particular to a sludge thermal modification drying system.
Background
With the rapid improvement of the sewage treatment capacity in China, the sludge yield is increased sharply, and related data show that the wet sludge yield with the water content of about 83 percent in China is nearly 8000 ten thousand tons in 2020, the future growth rate is 13-15 percent, and the sludge treatment situation in China is severe.
The high water content of the sludge is a key factor for restricting the treatment of the sludge. In order to save the dehydration cost, the sludge is usually dehydrated mechanically, and the minimum water content of the dehydrated mud cake can reach about 50 percent. However, since mechanical dehydration has a dehydration limit, it is difficult to remove the remaining water mechanically after the water content reaches a certain level. Although the mud cake after mechanical dehydration has a relatively stable framework, further dehydration is still needed to realize subsequent resource utilization, the current heating dehydration is an effective and common method, the energy consumption and the cost of the independent heating dehydration are high, and a new dehydration mode is inevitably explored on the basis of the mechanical dehydration for promoting the resource utilization of the sludge.
Content of application
In view of the above, the present application provides a thermal modification drying system for sludge, which is used for drying sludge, and includes:
the gas grinding device comprises a thermal modification section and a grinding section communicated with the thermal modification section;
the hopper is used for storing sludge cakes;
the crushing device is connected with the hopper and the thermal modification section of the gas grinding device and is used for crushing the mud cakes conveyed from the hopper and conveying the crushed mud powder to the thermal modification section;
the compressed gas generating device is used for generating compressed gas, the compressed gas generating device is respectively communicated with the thermal modification section and the grinding section through a normal-temperature gas conveying pipeline of a heated gas conveying pipeline machine, a gas heating device is arranged on the heated gas conveying pipeline and is used for heating the compressed gas entering the thermal modification section, mud powder enters the grinding section for further grinding after the thermal modification section is thermally modified to be unconnected by the heated compressed gas, and the further ground mud powder is mixed with the normal-temperature compressed gas;
an induced draft fan;
the cyclone separation device is connected with the flour milling section and the induced draft fan;
the water-gas separation device is connected with the induced draft fan and the compressed gas generation device;
the induced draft fan guides mud powder to enter the cyclone separation device for solid-liquid-gas three-phase separation, the separated mud powder solid is separated from a bottom plate of the cyclone separation device, the separated water mist and gas mixture are further separated by the water-gas separation device, the separated gas is recycled to the compressed gas generation device, and the separated liquid is separated from the water-gas separation device.
Furthermore, the device also comprises a first optical sensor, a second optical sensor and a third optical sensor which are arranged on the inner top surface of the thermal modification section and are sequentially arranged from far to near along the grinding section at intervals, wherein the third optical sensor is arranged at the part of the thermal modification section close to the grinding section.
Further, the cyclone separation device further comprises a fourth optical sensor, and the fourth optical sensor is arranged at one end, close to the cyclone separation device, of the top surface of the interior of the grinding section.
In some embodiments, the peripheries of the thermal modification section and the grinding section are provided with high-pressure gas nozzles communicated with the inside, the high-pressure gas nozzles of the thermal modification section are communicated with the heating gas conveying pipeline through a pipeline provided with a gas control valve, and the high-pressure gas nozzles of the grinding section are communicated with the normal-temperature gas conveying pipeline through a pipeline provided with a gas control valve.
Further, the heating device also comprises a temperature sensor, wherein the temperature sensor is arranged on the heating gas conveying pipeline.
In some embodiments, the gas supply device is in communication with the compressed gas generation device through a gas supply conduit.
Further, still include first gas flowmeter and second gas flowmeter, first gas flowmeter sets up on the tonifying qi pipeline, compressed gas generating device with water-gas separator passes through return-air pipeline intercommunication, second gas flowmeter sets up on the return-air pipeline.
In some embodiments, the method further comprises conveying the crushed mud cake in the crushing device to a shaftless conveyor of the thermal modification section and a moisture detection sensor mounted on the shaftless conveyor.
Furthermore, the shaftless material conveying machine further comprises a power device, and the power device is arranged on the shaftless material conveying machine and is used for driving the shaftless material conveying machine.
In some embodiments, the device further comprises a solid material receiving device and a water treatment device, wherein the solid material receiving device is used for receiving the mud powder solid separated in the cyclone separation device, and the water treatment device is used for collecting the liquid separated from the water-gas separation device.
In this application, through breaker with the mud cake breakage and through the thermal modification section thermal modification mud powder do not have the connection, divide the further grinding of mill section, can separate through cyclone and aqueous vapor separator abundant solid, liquid, gas three-phase to make the mummification dehydration degree of mud cake better, and then solved the technical problem that the sludge dewatering degree is low.
Drawings
FIG. 1 is a schematic view of a sludge thermal modification drying system according to an embodiment of the present application.
Detailed Description
The present application will be described in detail with reference to the drawings and specific embodiments, so that the technical solutions and advantages thereof will be more clearly understood. It is to be understood that the drawings are provided solely for purposes of illustration and not limitation, and that the dimensions shown in the drawings are for clarity of description and are not to be taken as limiting the scale.
Referring to fig. 1, the present application provides a thermal modification drying system for sludge, which is used for drying sludge, and includes:
the gas grinding device comprises a thermal modification section 12 and a grinding section 14 communicated with the thermal modification section 12;
the hopper 7 is used for storing sludge cakes;
the crushing device 8 is connected with the hopper 7 and the thermal modification section 12 of the gas grinding device and is used for crushing the mud cakes conveyed from the hopper 7 and conveying the crushed mud powder to the thermal modification section 12;
a compressed gas generating device 2 for generating compressed gas, wherein the compressed gas generating device 2 is respectively communicated with the thermal modification section 12 and the grinding section 14 through a normal temperature gas conveying pipeline 24 of a heated gas conveying pipeline 25, a gas heating device 3 is arranged on the heated gas conveying pipeline 25 for heating the compressed gas entering the thermal modification section 12, mud powder enters the grinding section 14 for further grinding after the thermal modification of the heated compressed gas in the thermal modification section 12 is completed until no connection, and the further ground mud powder is mixed with the normal temperature compressed gas;
an induced draft fan 17;
the cyclone separation device 16 is connected with the flour milling section 14 and the induced draft fan 17;
the water-gas separation device 18 is connected with the induced draft fan 17 and the compressed gas generation device 2;
the induced draft fan 17 guides mud powder to enter the cyclone separation device 16 for solid-liquid-gas three-phase separation, the separated mud powder solid is separated from a bottom plate of the cyclone separation device 16, the separated water mist and gas mixture is further separated through the water-gas separation device 18, the separated gas is recycled to the compressed gas generation device 2, and the separated liquid is separated from the water-gas separation device 18.
The sludge thermal modification drying system further comprises a first optical sensor 10, a second optical sensor 11 and a third optical sensor 13 which are arranged on the inner top surface of the thermal modification section 12 and are sequentially arranged from far to near along the grinding section 14 at intervals, and the third optical sensor 13 is arranged on the portion, close to the grinding section 14, of the thermal modification section. The first optical sensor 10, the second optical sensor 11 and the third optical sensor 13 are used for monitoring the thermal modification effect of the mud powder after the thermal modification of the thermal modification section 12 of the gas grinding device, and when the monitoring result of the third optical sensor 13 shows that the mud powder is not adhered, the mud powder is judged to be qualified in thermal modification.
The sludge thermal modification drying system further comprises a fourth optical sensor 15, and the fourth optical sensor 15 is arranged at one end, close to the cyclone separation device 16, of the top surface of the interior of the grinding section 14. The thermally modified mud powder entering the grinding section 14 for further grinding is monitored for grinding fineness by the fourth optical sensor 15.
The periphery of the thermal modification section 12 and the powder grinding section 14 is provided with a high-pressure gas nozzle 22 communicated with the interior, the high-pressure gas nozzle 22 of the thermal modification section 12 is communicated with the heating gas conveying pipeline 25 through a pipeline provided with a gas control valve, and the high-pressure gas nozzle 22 of the powder grinding section 14 is communicated with the normal-temperature gas conveying pipeline 24 through a pipeline provided with a gas control valve. A temperature sensor 26 is arranged in said heated gas delivery duct 25.
Part of the compressed gas generated by the compressed gas generating device 2 enters the thermal modification section 12 from the heated gas conveying pipeline 25 through a high-pressure gas sheet nozzle after being heated; the other part of the compressed gas enters the grinding section 14 from the normal temperature gas conveying pipeline 24 through a high pressure gas sheet nozzle. The pressure of the thermal reforming section 12 and the charge amount of the heated compressed gas are adjusted by operating the gas pressure control valve 23 communicating with the thermal reforming section 12. The pressure of the pulverizing section 14 and the charge amount of the normal temperature compressed gas are adjusted by operating the air pressure control valve 23 communicating with the pulverizing section 14. The injection angle of the high-pressure gas nozzle 22 can be adjusted as desired. Preferably, the compressed gas generated by the compressed gas generating device 2 is an inert gas.
The sludge thermal modification drying system further comprises an air supply device 27, and the air supply device 27 is communicated with the compressed gas generation device 2 through an air supply pipeline 1.
In this embodiment, the cyclonic separating apparatus 16 may be provided in a plurality of stages to ensure complete removal of the solid particles.
The sludge thermal modification drying system further comprises a first gas flowmeter 28 and a second gas flowmeter 29, wherein the first gas flowmeter is arranged on the air supply pipeline 1, the compressed gas generating device 2 is communicated with the water-gas separating device 18 through an air return pipeline 21, and the second gas flowmeter 29 is arranged on the air return pipeline 21. The gas separated from the water-gas separating device 18 is recycled to the compressed gas generating device 2 through the gas return pipeline 21, so that the using amount of inert gas can be saved, the gas can be recycled, and low emission or zero emission of the gas is realized.
The sludge thermal modification drying system also comprises a shaftless material conveyor 9 for conveying the sludge cakes crushed in the crushing device 8 to the thermal modification section 12 and a moisture detection sensor 5 arranged on the shaftless material conveyor 9. The moisture detection sensor 5 is used for detecting the water content of mud powder entering the wuzhou material conveyor from the crushing device 8.
The sludge thermal modification drying system further comprises a power device 4, wherein the power device 4 is installed on the shaftless material conveyor 9 and used for driving the shaftless material conveyor 9. A hopper valve 6 is further arranged on the hopper 7, and the hopper valve 6 can accurately control the feeding speed of the mud cakes entering the crushing device 8.
The sludge thermal modification drying system further comprises a solid material receiving device 20 and a water treatment device 19, wherein the fixed material receiving device is used for receiving the sludge powder solids separated in the self-rotary air separation device 16, and the water treatment device 19 is used for collecting the liquid separated by the water-gas separation device 18. Preferably, the solid material receiving means 20 is located below the cyclonic separating apparatus 16 and the water treatment apparatus 19 is located below the moisture separating apparatus.
The device comprises a compressed gas generating device 2, a gas heating device 3, a power device 4, a moisture detection sensor 5, a hopper valve 6, a crushing device 8, a first optical sensor 10, a second optical sensor 11, a third optical sensor 13, a fourth optical sensor 15, an induced draft fan 17, a water-gas separation device 18, a water treatment device 19, a solid material receiving device 20, a gas pressure control valve 23, a temperature sensor 26, a gas supplementing device 27, a first gas flowmeter 28 and a second gas flowmeter 29 which are controlled by a computer control system.
Before the sludge thermal modification drying system is used, a computer control system is started to ensure that a compressed gas generating device 2(2), a gas heating device 3, a power device 4, a hopper valve 6, an induced draft fan 17, a water-gas separation device 18, a water treatment device 19, a solid material receiving device 20, a gas pressure control valve 23 and a gas supplementing device 27 are in a closed state, relevant parameters are set on the computer control system, the angle of a high-pressure gas nozzle 22 is adjusted to a set position, and sludge cakes are loaded into a hopper 7; the compressed gas generating device 2 is started, then the gas heating device 3, the power device 4, the draught fan 17, the water-gas separating device 18, the water treatment device 19, the solid material receiving device 20, the air pressure control valve 23 and the air supplementing device 27 are started, so that the sludge thermal modification drying system is in an idling state, the compressed gas generating device 2 supplies gas to the thermal modification section 12 and the grinding section 14 of the gas grinding device respectively through a normal-temperature gas conveying pipeline 24 and a heating gas conveying pipeline 25, after the temperature tested by the temperature sensor 26 reaches a set value and the pressure and the air quantity tested by the air pressure control valve 23 are stable, the hopper valve 6 is opened, the mud cakes enter the crushing device 8 at a set speed, the crushed mud powder enters the gas grinding device through the shaftless material conveying machine 9 and is subjected to thermal modification by the thermal modification section 12 of the gas grinding device; at the moment, the thermal modification effect is monitored by the first optical sensor 10, the second optical sensor 11 and the third optical sensor 13, when the monitoring result of the third optical sensor 13 shows that no adhesion exists among mud powder, the thermal modification of the mud powder is judged to be qualified, meanwhile, in order to ensure the thermal modification effect, according to the water content data of the mud powder monitored by the moisture detection sensor 5, the set value of the temperature of the gas heated by the gas heating device 3 and filled into the thermal modification section 12 is higher than the preset parameter value so as to ensure that the monitoring result of the third optical sensor 13 is not adhesion, then the temperature is gradually reduced until the monitoring result of the third optical sensor 13 is in the critical value of no adhesion and adhesion, so as to save heat energy, and the whole process is automatically analyzed, adjusted and controlled by the computer control system according to the monitoring data; the mud powder after thermal modification is further ground by the grinding section 14 of the gas grinding device, and the grinding fineness is monitored by a fourth optical sensor 15; the fineness of the mud powder is controlled by adjusting the gas pressure and the gas charging amount in the grinding section 14 through a gas pressure control valve 23 of the grinding section 14; finely ground mud powder enters the cyclone separation device 16 to be subjected to three-phase separation under the action of the draught fan 17, the solid mud powder enters the solid material receiving device 20 from the bottom of the cyclone separation device 16 to be packaged, a gas and water mist mixture enters the water-gas separation device 18 from the top of the cyclone separation device 16 to be subjected to water-gas separation, water enters the water treatment device 19 from the bottom of the water-gas separation device 18 to be discharged after reaching the standard, the gas returns to the compressed gas generation device 2 through the gas return pipeline 21 to be recycled, insufficient gas in the compressed gas generation device 2 is supplemented in real time through the gas supplementing pipeline 1 by the gas supplementing device 27, and the hopper valve 6 and the gas supplementing quantity are automatically controlled by the computer control system according to monitoring parameters.
In this application, through breaker 8 with the mud cake breakage and through 12 thermal modification mud powder of thermal modification section no connection, divide the further grinding of mill section, can separate through cyclone 16 and the abundant solid of aqueous vapor separator 18, liquid, gas three-phase separation to make the mummification dehydration degree of mud cake better, and then solved the technical problem that the sludge dewatering degree is low.
The above description is only a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-listed embodiments, and any simple changes or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present disclosure fall within the protection scope of the present application.
Claims (10)
1. The utility model provides a mud thermal modification mummification system for carry out mummification to mud and handle, its characterized in that includes:
the gas grinding device comprises a thermal modification section and a grinding section communicated with the thermal modification section;
the hopper is used for storing sludge cakes;
the crushing device is connected with the hopper and the thermal modification section of the gas grinding device and is used for crushing the mud cakes conveyed from the hopper and conveying the crushed mud powder to the thermal modification section;
the compressed gas generating device is used for generating compressed gas, the compressed gas generating device is respectively communicated with the thermal modification section and the grinding section through a normal-temperature gas conveying pipeline of a heated gas conveying pipeline machine, a gas heating device is arranged on the heated gas conveying pipeline and is used for heating the compressed gas entering the thermal modification section, mud powder enters the grinding section for further grinding after the thermal modification section is thermally modified to be unconnected by the heated compressed gas, and the further ground mud powder is mixed with the normal-temperature compressed gas;
an induced draft fan;
the cyclone separation device is connected with the flour milling section and the induced draft fan;
the water-gas separation device is connected with the induced draft fan and the compressed gas generation device;
the induced draft fan guides mud powder to enter the cyclone separation device for solid-liquid-gas three-phase separation, the separated mud powder solid is separated from a bottom plate of the cyclone separation device, the separated water mist and gas mixture are further separated by the water-gas separation device, the separated gas is recycled to the compressed gas generation device, and the separated liquid is separated from the water-gas separation device.
2. The sludge thermal modification drying system as claimed in claim 1, further comprising a first optical sensor, a second optical sensor and a third optical sensor which are arranged on the inner top surface of the thermal modification section and are arranged at intervals along the sequence from far to near from the grinding section, wherein the third optical sensor is arranged at the part of the thermal modification section close to the grinding section.
3. The sludge thermal modification drying system as claimed in claim 2, further comprising a fourth optical sensor disposed at an end of the inner top surface of the pulverizing section near the cyclone separation device.
4. The sludge thermal modification drying system as claimed in claim 1, wherein the thermal modification section and the grinding section are provided with high-pressure gas nozzles at their peripheries, the high-pressure gas nozzles of the thermal modification section are communicated with the heating gas conveying pipeline through a pipeline provided with a gas control valve, and the high-pressure gas nozzles of the grinding section are communicated with the normal-temperature gas conveying pipeline through a pipeline provided with a gas control valve.
5. The system for thermally modifying and drying sludge as claimed in claim 4, further comprising a temperature sensor disposed in the heated gas delivery conduit.
6. The thermal-modification drying system for sludge as claimed in claim 1, further comprising an air supply device, wherein the air supply device is communicated with the compressed gas generation device through an air supply pipeline.
7. The system for thermally modifying and drying sludge as claimed in claim 6, further comprising a first gas flow meter and a second gas flow meter, wherein the first gas flow meter is disposed on the air supply pipeline, the compressed gas generating device is communicated with the water-gas separating device through an air return pipeline, and the second gas flow meter is disposed on the air return pipeline.
8. The system for thermally modifying and drying sludge as claimed in claim 1, further comprising a shaftless conveyor for conveying the crushed sludge cake in the crushing device to the thermal modification section, and a moisture detection sensor mounted on the shaftless conveyor.
9. The system for thermally modifying and drying sludge as claimed in claim 8, further comprising a power device, wherein the power device is installed on the shaftless conveyor and is used for driving the shaftless conveyor.
10. The system for thermally modifying and drying sludge as claimed in claim 1, further comprising a solid material receiving device and a water treatment device, wherein the solid material receiving device is used for receiving the sludge powder solids separated in the cyclone separation device, and the water treatment device is used for collecting the liquid separated from the water-gas separation device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110136255.0A CN112919772B (en) | 2021-02-01 | 2021-02-01 | Sludge thermal modification drying system |
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| CN202110136255.0A CN112919772B (en) | 2021-02-01 | 2021-02-01 | Sludge thermal modification drying system |
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| CN112919772A true CN112919772A (en) | 2021-06-08 |
| CN112919772B CN112919772B (en) | 2022-10-21 |
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| US4970803A (en) * | 1989-01-27 | 1990-11-20 | Sulzer-Escher Wyss Gmbh | Method for drying sludge |
| US5426866A (en) * | 1991-06-25 | 1995-06-27 | Lucia Baumann-Schilp | Method and apparatus for dewatering of sludges |
| CN101148310A (en) * | 2007-09-13 | 2008-03-26 | 北京中油爱索环境工程技术有限公司 | Process for treating oil-containing sludge |
| CN102381820A (en) * | 2011-09-20 | 2012-03-21 | 福州开发区三水环保科技有限公司 | Sludge treatment process based on hydrothermal modification technology |
| US20120246965A1 (en) * | 2009-09-28 | 2012-10-04 | Huansheng Zhong | Method and Apparatus for Aerobically Air-drying Sludge Filter Cakes |
| US20160045841A1 (en) * | 2013-03-15 | 2016-02-18 | Transtar Group, Ltd. | New and improved system for processing various chemicals and materials |
| US20180335328A1 (en) * | 2017-05-17 | 2018-11-22 | Red Meters LLC | Methods for designing a flow conduit and apparatus that measures deflection at multiple points to determine flow rate |
| CN109928597A (en) * | 2019-03-28 | 2019-06-25 | 北京科技大学 | Excess sludge depth drying equipment system and method |
| CN209555027U (en) * | 2018-12-18 | 2019-10-29 | 湖南大学 | A kind of cyclone system for sludge drying |
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2021
- 2021-02-01 CN CN202110136255.0A patent/CN112919772B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4618735A (en) * | 1983-09-13 | 1986-10-21 | Canadian Patents And Development Limited | Process and apparatus for the conversion of sludges |
| US4970803A (en) * | 1989-01-27 | 1990-11-20 | Sulzer-Escher Wyss Gmbh | Method for drying sludge |
| US5426866A (en) * | 1991-06-25 | 1995-06-27 | Lucia Baumann-Schilp | Method and apparatus for dewatering of sludges |
| CN101148310A (en) * | 2007-09-13 | 2008-03-26 | 北京中油爱索环境工程技术有限公司 | Process for treating oil-containing sludge |
| US20120246965A1 (en) * | 2009-09-28 | 2012-10-04 | Huansheng Zhong | Method and Apparatus for Aerobically Air-drying Sludge Filter Cakes |
| CN102381820A (en) * | 2011-09-20 | 2012-03-21 | 福州开发区三水环保科技有限公司 | Sludge treatment process based on hydrothermal modification technology |
| US20160045841A1 (en) * | 2013-03-15 | 2016-02-18 | Transtar Group, Ltd. | New and improved system for processing various chemicals and materials |
| US20180335328A1 (en) * | 2017-05-17 | 2018-11-22 | Red Meters LLC | Methods for designing a flow conduit and apparatus that measures deflection at multiple points to determine flow rate |
| CN209555027U (en) * | 2018-12-18 | 2019-10-29 | 湖南大学 | A kind of cyclone system for sludge drying |
| CN109928597A (en) * | 2019-03-28 | 2019-06-25 | 北京科技大学 | Excess sludge depth drying equipment system and method |
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| CN112919772B (en) | 2022-10-21 |
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