CN117865430A - Sludge dewatering and drying system - Google Patents
Sludge dewatering and drying system Download PDFInfo
- Publication number
- CN117865430A CN117865430A CN202410199121.7A CN202410199121A CN117865430A CN 117865430 A CN117865430 A CN 117865430A CN 202410199121 A CN202410199121 A CN 202410199121A CN 117865430 A CN117865430 A CN 117865430A
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- China
- Prior art keywords
- sludge
- autoclave
- heat exchanger
- drying system
- communicated
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- 239000010802 sludge Substances 0.000 title claims abstract description 136
- 238000001035 drying Methods 0.000 title claims abstract description 47
- 238000003825 pressing Methods 0.000 claims abstract description 39
- 238000003860 storage Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 208000005156 Dehydration Diseases 0.000 claims abstract description 8
- 230000018044 dehydration Effects 0.000 claims abstract description 8
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 8
- 239000000498 cooling water Substances 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 12
- 239000002028 Biomass Substances 0.000 claims description 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 5
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 5
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 230000035484 reaction time Effects 0.000 claims description 4
- 238000011085 pressure filtration Methods 0.000 claims 2
- 238000004064 recycling Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000003763 carbonization Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to a sludge dewatering and drying system, which comprises: the device comprises a sludge storage tank, a heating device, a filter pressing device and a heat exchange device. The heating device comprises a heater, an autoclave and a first heat conduction oil loop, wherein the heater is communicated with the autoclave through the first heat conduction oil loop, a sludge storage tank is communicated with the autoclave, the sludge storage tank is used for introducing sludge to be treated into an inlet of the autoclave, a filter pressing device is communicated with an outlet of the autoclave, the filter pressing device is used for carrying out filter pressing dehydration treatment on the sludge, the heat exchange device comprises a first heat exchanger, a second heat exchanger and a second heat conduction oil loop, the first heat exchanger is arranged between the sludge storage tank and an inlet of the autoclave, the second heat exchanger is arranged between the second heat exchangers, and the second heat conduction oil loop is communicated with the first heat exchanger and the second heat exchanger. The sludge dewatering and drying system can realize the recycling of energy, reduce the sludge treatment cost and has high reliability.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a sludge dewatering and drying system.
Background
In the related art, the sludge treatment system utilizes the heat of sludge incineration to carry out sludge drying, but the sludge treatment cost is higher due to the complex structure of the sludge incineration device and the large investment cost and the long treatment period.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the embodiment of the invention provides a sludge dewatering and drying system which can realize the recycling of energy, reduce the sludge treatment cost and has high reliability.
The sludge dewatering and drying system of the embodiment of the invention comprises: a sludge storage tank; the heating device comprises a heater, an autoclave and a first heat conduction oil loop, wherein the heater is communicated with the autoclave through the first heat conduction oil loop, a sludge storage tank is communicated with the autoclave, and the sludge storage tank is used for introducing sludge to be treated to an inlet of the autoclave; the filter pressing device is communicated with the outlet of the autoclave and is used for carrying out filter pressing dehydration treatment on the sludge; the heat exchange device comprises a first heat exchanger, a second heat exchanger and a second heat conduction oil loop, wherein the first heat exchanger is arranged between the sludge storage tank and the autoclave inlet, the second heat exchanger is arranged between the second heat exchangers, and the second heat conduction oil loop is communicated with the first heat exchanger and the second heat exchanger.
According to the sludge dewatering and drying system provided by the embodiment of the invention, the heat conduction oil of the first heat conduction oil loop can be heated by the heater to heat the autoclave, so that the sludge entering the autoclave is heated, and the stability and reliability of sludge heating in the sludge dewatering and drying system are ensured. Because the second conduction oil circuit is communicated with the first heat exchanger and the second heat exchanger, the first heat exchanger can circulate the conduction oil with lower temperature to the second heat exchanger through the second conduction oil circuit so as to cool the sludge discharged out of the autoclave, and the second heat exchanger can circulate the conduction oil with higher temperature to the first heat exchanger through the second conduction oil circuit so as to preheat the sludge entering into the autoclave, thereby improving the effect of heating and drying the sludge, recycling heat and reducing the running cost of a sludge dewatering and drying system.
In some embodiments, the sludge dewatering and drying system further comprises a cooler and a cooling water loop, wherein the cooling water loop is communicated with the cooler, the cooler is arranged between the second heat exchanger and the filter pressing device, an outlet of the second heat exchanger is communicated with an inlet of the cooler, and an outlet of the cooler is communicated with the filter pressing device.
In some embodiments, the sludge dewatering and drying system further comprises a pressure relief tank, wherein the pressure relief tank is arranged between the second heat exchanger and the filter pressing device, an inlet of the pressure relief tank is communicated with an outlet of the cooler, and an outlet of the pressure relief tank is communicated with the filter pressing device.
In some embodiments, the sludge dewatering and drying system further comprises a spiral discharger, wherein the spiral discharger is arranged between the pressure relief tank and the filter pressing device, an inlet of the spiral discharger is communicated with an outlet of the pressure relief tank, and an outlet of the spiral discharger is communicated with the filter pressing device.
In some embodiments, the sludge dewatering and drying system further comprises a modulator in communication with the screw discharger for introducing biomass and/or slaked lime to the screw discharger.
In some embodiments, the sludge dewatering and drying system further comprises a percolate anaerobic tank for storing percolate and generating biogas, the percolate anaerobic tank being in communication with the heater for introducing the biogas into the heater.
In some embodiments, the sludge entering the autoclave is reacted at a preset pressure greater than or equal to 0.1Mpa and less than or equal to 0.3Mpa and a preset temperature greater than or equal to 200 ℃ and less than or equal to 300 ℃.
In some embodiments, the reaction time of the sludge entering the autoclave is 1h or more and 1.5h or less in the autoclave.
Drawings
Fig. 1 is a schematic diagram of a sludge dewatering and drying system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a sludge dewatering and drying system according to another embodiment of the present invention.
Reference numerals:
1. a sludge storage tank;
2. a heating device; 21. a heater; 22. an autoclave; 23. a first conduction oil circuit;
3. a filter pressing device;
4. a heat exchange device; 41. a first heat exchanger; 42. a second heat exchanger; 43. a second conduction oil circuit;
51. a cooler; 52. a cooling water circuit;
6. a pressure relief tank;
7. a screw discharger;
8. a modulator;
9. a percolate anaerobic tank;
10. and a sludge conveying pump.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A sludge dewatering and drying system according to an embodiment of the present invention will be described with reference to fig. 1 and 2.
As shown in fig. 1 and 2, a sludge dewatering and drying system according to an embodiment of the present invention includes: a sludge storage tank 1, a heating device 2, a filter pressing device 3 and a heat exchange device 4. The heating device 2 comprises a heater 21, an autoclave 22 and a first heat conducting oil loop 23, wherein the heater 21 is communicated with the autoclave 22 through the first heat conducting oil loop 23, the sludge storage tank 1 is communicated with the autoclave 22, and the sludge storage tank 1 is used for leading sludge to be treated into an inlet of the autoclave 22. The filter pressing device 3 is communicated with the outlet of the autoclave 22, and the filter pressing device 3 is used for carrying out filter pressing dehydration treatment on sludge. The heat exchange device 4 comprises a first heat exchanger 41, a second heat exchanger 42 and a second heat conduction oil loop 43, wherein the first heat exchanger 41 is arranged between the sludge storage tank 1 and the inlet of the autoclave 22, the second heat exchanger 42 is arranged between the second heat exchangers 42, and the second heat conduction oil loop 43 is communicated with the first heat exchanger 41 and the second heat exchanger 42.
According to the sludge dewatering and drying system provided by the embodiment of the invention, the heat conduction oil of the first heat conduction oil loop 23 can be heated by the heater 21 to heat the autoclave 22, so that the sludge entering the autoclave 22 is heated, and the stability and reliability of sludge heating in the sludge dewatering and drying system are ensured. Because the second heat conduction oil loop 43 is communicated with the first heat exchanger 41 and the second heat exchanger 42, the first heat exchanger 41 can circulate the heat conduction oil with lower temperature to the second heat exchanger 42 through the second heat conduction oil loop 43 so as to cool the sludge discharged out of the autoclave 22, and the second heat exchanger 42 can circulate the heat conduction oil with higher temperature to the first heat exchanger 41 through the second heat conduction oil loop 43 so as to preheat the sludge entering into the autoclave 22, so that the effect of heating and drying the sludge can be improved, the heat can be recycled, and the running cost of a sludge dewatering and drying system can be reduced.
Optionally, as shown in fig. 1 and 2, the sludge dewatering and drying system further comprises a cooler 51 and a cooling water loop 52, the cooling water loop 52 is communicated with the cooler 51, the cooler 51 is arranged between the second heat exchanger 42 and the filter pressing device 3, an outlet of the second heat exchanger 42 is communicated with an inlet of the cooler 51, and an outlet of the cooler 51 is communicated with the filter pressing device 3. It will be appreciated that the cooling water circuit 52 is fed with cooling water which can further cool the sludge passing through the cooler 51, thereby improving the cooling effect of the sludge for the implementation of the next process.
Optionally, as shown in fig. 1 and fig. 2, the sludge dewatering and drying system further includes a pressure relief tank 6, where the pressure relief tank 6 is disposed between the second heat exchanger 42 and the filter pressing device 3, an inlet of the pressure relief tank 6 is communicated with an outlet of the cooler 51, and an outlet of the pressure relief tank 6 is communicated with the filter pressing device 3, and it is understood that the pressure relief tank 6 is used for relieving pressure of sludge discharged from the cooler 51 so as to discharge gas in the sludge, reduce pressure in a pipeline, and improve operational reliability of the sludge dewatering and drying system.
Optionally, as shown in fig. 1 and 2, the sludge dewatering and drying system further comprises a spiral discharger 7, wherein the spiral discharger 7 is arranged between the pressure relief tank 6 and the filter pressing device 3, an inlet of the spiral discharger 7 is communicated with an outlet of the pressure relief tank 6, and an outlet of the spiral discharger 7 is communicated with the filter pressing device 3. It can be understood that the spiral discharger 7 can be of an auger structure, and the spiral discharger 7 can convey solid sludge into the filter pressing device 3, so that the convenience of sludge transportation is improved, and the structure design is simple, and the processing and the manufacturing are convenient.
Optionally, as shown in fig. 2, the sludge dewatering and drying system further comprises a modulator 8, the modulator 8 is communicated with the spiral discharger 7, the modulator 8 is used for introducing biomass and/or slaked lime into the spiral discharger 7 so as to modulate and treat the sludge entering the filter pressing device 3, and the modulator 8 is arranged at the joint of the spiral discharger 7 and the filter pressing device 3 in the sludge dewatering and drying system disclosed by the embodiment of the invention, so that biomass and/or slaked lime can be conveniently added into the sludge, and the convenience of sludge modulation is improved.
In some embodiments, as shown in fig. 1 and 2, the sludge dewatering and drying system further comprises a percolate anaerobic tank 9 for storing percolate and generating biogas, the percolate anaerobic tank being in communication with the heater 21 for introducing biogas into the heater 21. It can be understood that the sludge dewatering and drying system provided by the embodiment of the invention can utilize methane generated in the treatment process of domestic garbage leachate as a heat source for sludge drying, so that the energy is efficiently utilized, and the development trend of the cooperative treatment of wastes in China is met. In addition, the sludge dewatering and drying system of the embodiment of the invention realizes energy transfer between cold and hot products by using the heat conduction oil, and realizes energy recycling and process flow optimization.
Optionally, the sludge entering the autoclave reacts under a preset pressure and a preset temperature, wherein the preset pressure is greater than or equal to 0.1Mpa and less than or equal to 0.3Mpa, and the preset temperature is greater than or equal to 200 ℃ and less than or equal to 300 ℃. For example, the preset pressure may be 0.1Mpa, 0.2Mpa, or 0.3Mpa. The preset temperature may be 200 ℃, 250 ℃, 300 ℃. The inventor of the present application found through experimental study that when the sludge introduced into the autoclave is reacted under the above conditions, the efficiency of the hydrothermal carbonization reaction of the sludge can be made higher, and the reaction of the sludge can be made more sufficient.
Further, the reaction time of the sludge entering the autoclave is 1h or more and 1.5h or less in the autoclave. For example, the reaction time of the sludge entering the autoclave in the autoclave may be 1h, 1.2h, 1.5h. The inventor of the application finds through experimental research that when the sludge entering the autoclave reacts under the conditions, the sludge can be ensured to react completely, the production efficiency of a sludge dewatering and drying system can be improved, and the energy consumption of the sludge dewatering and drying system can be reduced.
Example 1:
as shown in fig. 1, the water-containing sludge in the sludge storage tank 1 is conveyed to the autoclave 22 by the sludge conveying pump 10, the sludge is heated by high-temperature heat conduction oil in the conveying process, the sludge entering the autoclave 22 is subjected to hydrothermal carbonization reaction for 1-1.5h under the conditions of 0.1-0.3mpa and 200-350 ℃, the reacted high-temperature product is conveyed to the pressure relief tank 6, the temperature of the reaction product is respectively reduced by the heat conduction oil and cooling water, and the sludge discharged from the pressure relief tank 6 is conveyed to the filter pressing device 3 by the spiral discharger 7 for filter pressing and dehydration, so that the dried sludge is finally obtained.
It should be noted that:
1. the first part of heat conduction oil has the function of recycling heat between cold and hot sludge entering and exiting the autoclave 22, and the purpose of heating low-temperature sludge by absorbing heat of high-temperature sludge and cooling water is to enable the temperature of the high-temperature sludge to be further reduced and then enter the pressure relief tank 6; the sludge decompressed by the pressure relief tank 6 is conveyed to the filter pressing device 3 through the spiral discharger 7 for filter pressing and dehydration treatment, and finally dried sludge is formed.
2. The heat source for continuously providing heat by the autoclave 22 is methane generated in the percolate anaerobic tank 9, after entering the heater 21 for combustion reaction, the heat conduction oil is heated, and after the heat conduction oil with high temperature flows through the autoclave 22 for providing heat for the autoclave for cooling, the heat conduction oil returns to the heater 21 again for heating, and the circulation is repeated.
Example 2:
as shown in fig. 2, the water-containing sludge in the sludge storage tank 1 is conveyed to the autoclave 22 by the sludge conveying pump 10, the sludge is heated by high-temperature heat conduction oil in the conveying process, the sludge entering the autoclave 22 is subjected to hydrothermal carbonization reaction for 1-1.5h under the conditions of 0.1-0.3mpa and 200-350 ℃, the reacted high-temperature product is conveyed to the pressure relief tank 6, the temperature of the reaction product is respectively reduced by the heat conduction oil and cooling water, the sludge discharged from the pressure relief tank 6 is conveyed to the filter pressing device 3 by the screw discharger 7 for filter pressing dehydration, biomass and slaked lime are added in the conveying process for modulation, and finally the SRF fuel (solid recovery fuel) is produced by the filter pressing device 3.
It should be noted that:
1. the first part of heat conduction oil has the function of recycling heat between cold and hot sludge entering and exiting the autoclave 22, and the purpose of heating low-temperature sludge by absorbing heat of high-temperature sludge and cooling water is to enable the temperature of the high-temperature sludge to be further reduced and then enter the pressure relief tank 6; the sludge decompressed by the pressure relief tank 6 is conveyed to the filter pressing device 3 through the spiral discharger 7 for filter pressing and dehydration treatment, and finally dried sludge is formed.
2. The heat source for continuously providing heat for the autoclave 22 is methane generated in the percolate anaerobic tank 9, after entering the heater 21 for combustion reaction, the heat conduction oil is heated, and after the heat conduction oil with high temperature flows through the autoclave 22 for providing heat for the autoclave for cooling, the heat conduction oil returns to the heater 21 again for heating, and the circulation is repeated.
In summary, the sludge dewatering and drying system of the embodiment of the invention has at least the following technical effects:
1. the biogas generated in the treatment process of the domestic garbage leachate is used as a heat source for sludge drying, so that the energy is efficiently utilized;
2. the sludge is treated by using a hydrothermal carbonization technology, and the formed sludge has higher heat value and higher recycling value.
3. The heat conduction oil is used for realizing energy transfer between cold and hot products, and realizing cyclic utilization of energy and optimization of process flow.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.
Claims (8)
1. The sludge dewatering and drying system is characterized by comprising:
a sludge storage tank;
the heating device comprises a heater, an autoclave and a first heat conduction oil loop, wherein the heater is communicated with the autoclave through the first heat conduction oil loop, a sludge storage tank is communicated with the autoclave, and the sludge storage tank is used for introducing sludge to be treated to an inlet of the autoclave;
the filter pressing device is communicated with the outlet of the autoclave and is used for carrying out filter pressing dehydration treatment on the sludge;
the heat exchange device comprises a first heat exchanger, a second heat exchanger and a second heat conduction oil loop, wherein the first heat exchanger is arranged between the sludge storage tank and the autoclave inlet, the second heat exchanger is arranged between the second heat exchangers, and the second heat conduction oil loop is communicated with the first heat exchanger and the second heat exchanger.
2. The sludge dewatering and drying system according to claim 1, further comprising a cooler and a cooling water circuit, wherein the cooling water circuit is in communication with the cooler, the cooler is disposed between the second heat exchanger and the filter press, an outlet of the second heat exchanger is in communication with an inlet of the cooler, and an outlet of the cooler is in communication with the filter press.
3. The sludge dewatering and drying system of claim 2, further comprising a pressure relief tank disposed between the second heat exchanger and the pressure filtration device, wherein an inlet of the pressure relief tank is in communication with an outlet of the cooler, and an outlet of the pressure relief tank is in communication with the pressure filtration device.
4. The sludge dewatering and drying system according to claim 3, further comprising a screw discharger, wherein the screw discharger is arranged between the pressure relief tank and the filter pressing device, an inlet of the screw discharger is communicated with an outlet of the pressure relief tank, and an outlet of the screw discharger is communicated with the filter pressing device.
5. The sludge dewatering drying system of claim 4 further comprising a modulator in communication with the screw discharger, the modulator for introducing biomass and/or slaked lime to the screw discharger.
6. The sludge dewatering drying system of any of claims 1-5, further comprising a percolate anaerobic tank for storing percolate and producing biogas, the percolate anaerobic tank in communication with the heater to pass the biogas into the heater.
7. The sludge dewatering and drying system according to claim 1, wherein the sludge introduced into the autoclave is reacted at a preset pressure of 0.1Mpa or more and 0.3Mpa or less and a preset temperature of 200 ℃ or more and 300 ℃ or less.
8. The sludge dewatering and drying system according to claim 7, wherein a reaction time of the sludge introduced into the autoclave is 1h or more and 1.5h or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410199121.7A CN117865430A (en) | 2024-02-22 | 2024-02-22 | Sludge dewatering and drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410199121.7A CN117865430A (en) | 2024-02-22 | 2024-02-22 | Sludge dewatering and drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117865430A true CN117865430A (en) | 2024-04-12 |
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ID=90583159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410199121.7A Pending CN117865430A (en) | 2024-02-22 | 2024-02-22 | Sludge dewatering and drying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117865430A (en) |
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2024
- 2024-02-22 CN CN202410199121.7A patent/CN117865430A/en active Pending
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