CN211896635U - Sludge drying system - Google Patents
Sludge drying system Download PDFInfo
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- CN211896635U CN211896635U CN202020484829.4U CN202020484829U CN211896635U CN 211896635 U CN211896635 U CN 211896635U CN 202020484829 U CN202020484829 U CN 202020484829U CN 211896635 U CN211896635 U CN 211896635U
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- sludge
- heat
- waste heat
- waste
- exchange channel
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- 239000010802 sludge Substances 0.000 title claims abstract description 126
- 238000001035 drying Methods 0.000 title claims abstract description 47
- 239000002918 waste heat Substances 0.000 claims abstract description 77
- 239000002699 waste material Substances 0.000 claims abstract description 31
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000003507 refrigerant Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 11
- 239000006096 absorbing agent Substances 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 16
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Abstract
The utility model provides a sludge drying system, which comprises a sludge dryer, a cooler and a waste heat heating device, wherein the cooler comprises a first heat exchange channel and a second heat exchange channel, the first heat exchange channel is used for being communicated with a waste steam outlet of the sludge dryer, and the second heat exchange channel and a waste heat pipeline in the waste heat heating device form a waste heat circulation loop; the utility model discloses well utilization waste heat equipment of heating can turn into the advantage of the middle grade energy with the waste heat, passes through the medium collection in the waste heat circulation return circuit with the waste steam waste heat that evaporates among the sludge drying machine, and after the medium among the waste heat circulation return circuit got into waste heat equipment of heating, can provide the heat of preparing the middle grade energy, improved energy utilization like this and rateed, reduce system's power consumption to can need not heat abstractor such as cooling tower, reduce sludge drying system's use cost.
Description
Technical Field
The utility model relates to a heat recovery field, concretely relates to sludge drying system.
Background
The sludge drying system is a system for drying wet sludge into dry sludge. The main equipment for drying the sludge is a sludge dryer, high-temperature steam and wet sludge are introduced into the sludge dryer, and in the process that the wet sludge flows through the sludge dryer, the high-temperature steam evaporates the moisture in the wet sludge to form micro-pressure steam. The temperature and the humidity of the micro-pressure steam are high, and the micro-pressure steam cannot be directly discharged into the atmosphere and needs to be cooled through cooling equipment.
At present, micro-pressure steam is cooled mainly by a cooling tower condensation mode, which not only causes energy waste, but also consumes a large amount of circulating water.
Therefore, how to reduce the waste of energy in the sludge drying system is a technical problem that is always pursued by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a sludge drying system, including the sludge drying machine, still include cooler and waste heat heating equipment, the cooler includes first heat transfer passageway and second heat transfer passageway, first heat transfer passageway be used for with the exhaust steam outlet intercommunication of sludge drying machine, the second heat transfer passageway forms the waste heat circulation loop with the waste heat pipeline inside the waste heat heating equipment;
when the waste heat heating device works, a medium in the waste heat circulation loop flows through the second heat exchange channel to be heated in heat exchange with waste steam in the first heat exchange channel, and after the heated medium flows through a waste heat pipeline of the waste heat heating device, the waste heat in the heated medium is converted into intermediate-grade energy.
Adopt the cooling tower to compare for the cooler provides the cold source with prior art, the utility model discloses well utilization waste heat equipment of heating can turn into the advantage of the middle grade energy with the waste heat, the waste steam waste heat that evaporates among the sludge drying machine passes through the medium collection in the waste heat circulation return circuit, behind the medium entering waste heat equipment of heating in the waste heat circulation return circuit, can provide the heat of preparing the middle grade energy, improved energy usage rate like this, reduce system's power consumption to can need not heat abstractor such as cooling tower, reduce sludge drying system's use cost.
Optionally, the waste heat heating includes a first-type absorption heat pump, the first-type absorption heat pump includes a generator, a condenser, an evaporator and an absorber, the waste heat pipeline inside the evaporator and the second heat exchange channel form the waste heat circulation loop, and during operation, the refrigerant water flowing into the evaporator and the waste heat medium inside the waste heat pipeline exchange heat to form refrigerant steam.
Optionally, the system further comprises a pre-dust collector, which is arranged between the waste steam outlet of the sludge dryer and the inlet of the first heat exchange channel, and is used for filtering solid particles in the waste steam flowing out of the sludge dryer; the pre-deduster comprises a gas inlet, a gas outlet and a solid particle discharge port, the gas inlet is communicated with a waste steam outlet of the sludge dryer, the gas outlet is communicated with the first heat exchange channel inlet, and the solid particle discharge port is used for discharging solid particles filtered inside the pre-deduster.
Optionally, the system further comprises a fan, and an air inlet of the fan is communicated with the gas outlet of the cooler to provide power for the flow of the waste steam in the system.
Optionally, still include wet sludge bin and deodorizer, wet sludge bin connect in sludge drying machine's upper reaches, the import of fan also communicates the gas outlet in wet sludge bin, the air outlet intercommunication of fan the import of deodorizer, the deodorizer is used for purifying the gas that flows into its inside.
Optionally, the sludge drying system further comprises a sludge cooling machine and a drying sludge bin, wherein the sludge cooling machine is used for cooling the sludge flowing out from the sludge drying machine, and the drying sludge bin is connected to the downstream of the sludge cooling machine and is used for drying the sludge flowing out from the sludge cooling machine.
Drawings
Fig. 1 is a schematic structural diagram of a specific embodiment of a sludge drying system provided by the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a specific embodiment of a sludge drying system provided by the present invention.
The utility model provides a sludge drying system, at least, comprising a sludge dryer 2, a cooler 5 and a waste heat heating device 7. The sludge dryer 2 may be a device for drying wet sludge by using a high-temperature heat source, the high-temperature heat source may be high-temperature steam or high-temperature hot water, and the specific structure of the sludge dryer 2 may refer to the existing device, which is not described herein in detail.
The utility model provides a cooler 5 includes first heat transfer passageway and second heat transfer passageway, first heat transfer passageway be used for with sludge drying machine 2's exhaust steam export intercommunication, the second heat transfer passageway forms waste heat circulation return circuit with the inside waste heat pipeline of waste heat equipment for heating 7. The first heat exchange channel and the second heat exchange channel can be in the form of heat exchange tubes, and certainly can be in other forms as long as the heat exchange of the two media can be realized. The cooler 5 includes an inlet and an outlet which are communicated with the waste steam outlet of the sludge dryer 2 and the waste heat heating device 7, and certainly there is also a gas outlet and a condensed water outlet, and the specific structure of the cooler 5 may refer to the prior art and is not described in detail herein.
The utility model provides a sludge drying system during operation, the waste heat circulation return circuit medium flow through the waste steam heat exchange of second heat transfer passageway and first heat transfer passageway inside is heated, and waste steam is cooled off simultaneously, and vapor in the waste steam is formed the comdenstion water by the condensation, and the gas outlet that is not condensed can be discharged from cooler 5.
That is, the medium in the exhaust heat circulation circuit exchanges heat with the exhaust steam in the cooler 5 to be heated, the heated medium flows out of the cooler 5, flows into the exhaust heat pipe of the exhaust heat facility 7, and the internal exhaust heat thereof is converted into an intermediate-grade energy after flowing through the exhaust heat pipe of the exhaust heat facility 7. The energy of the intermediate grade can be medium-temperature hot water, and the medium-temperature hot water can be applied to process heat tracing or resident, office heating or other fields.
That is, the waste heat heating apparatus 7 of the present invention includes a device for recovering low-grade waste heat (a medium in the waste heat circulation circuit after exchanging heat with waste steam) to produce a large amount of intermediate-grade energy by using a small amount of high-grade energy (steam, hot water, gas, etc.) consumed as a drive.
Adopt the cooling tower to compare for cooler 5 provides the cold source with prior art, the utility model discloses well utilization waste heat equipment 7 that heats can turn into the advantage of the middle grade energy with the waste heat, the waste steam waste heat that evaporates among the sludge drying machine 2 passes through the medium collection in the waste heat circulation return circuit, medium among the waste heat circulation return circuit gets into behind the waste heat equipment 7 that heats, can provide the heat of preparing the middle grade energy, the energy usage rate has been improved like this, the power consumption of lowering system, and can need not heat abstractor such as cooling tower, reduce sludge drying system's use cost.
In a specific embodiment, the waste heat heating apparatus 7 may include a first type absorption heat pump, which includes a generator, a condenser, an evaporator and an absorber, wherein a waste heat pipeline inside the evaporator and the second heat exchange channel form a waste heat circulation loop, and during operation, the refrigerant water flowing into the evaporator exchanges heat with the waste heat medium inside the waste heat pipeline to form refrigerant steam.
Specifically, the first type of absorption heat pump is a device for realizing heat energy transmission from low temperature to high temperature, and the heat pump takes high-grade heat medium as driving heat medium, and recycles the heat energy of a low-grade heat source through an absorbent and a refrigerant, so that the heat supply heat medium is converted into the required high-temperature heat medium. The first type of absorption heat pump works as follows:
the evaporator is arranged in a low-pressure environment, and waste heat heating media which are in the waste heat circulation loop and exchange heat from the cooler 5 are introduced into the rest heat pipelines. The evaporator is sprayed with refrigerant water, and the refrigerant water is boiled in a low-pressure environmentPoint reduction, absorbing heat Q of waste heat medium when refrigerant water is sprayed on the surface of waste heat pipeline of evaporatorEEvaporating to form refrigerant vapor.
The refrigerant vapor generated in the evaporator 3 continues to pass into the absorber 4, which contains an aqueous absorbent solution to absorb the refrigerant vapor and release the heat of absorption QAThe aqueous absorbent solution may be a lithium bromide solution having a relatively high concentration. In addition, a heat supply heat medium is introduced into the heat exchange pipe of the absorber 4, and the heat supply heat medium absorbs the absorption heat QAThe temperature is increased, so that the purpose of heating the heat medium by utilizing the waste heat medium is achieved, and the heat of the waste heat medium is effectively utilized.
The lithium bromide concentrated solution in the absorber is diluted after absorbing refrigerant steam, the concentration is reduced to become a lithium bromide dilute solution, and the lithium bromide dilute solution is introduced into the generator; a driving heat medium is introduced into a driving heat source pipeline of the generator, and water in the lithium bromide dilute solution absorbs the heat Q of the driving heat mediumGEvaporating to form refrigerant vapor, converting the lithium bromide dilute solution into a lithium bromide concentrated solution again, and then introducing the lithium bromide concentrated solution into an absorber for absorbing the refrigerant vapor in the absorber again.
Meanwhile, the refrigerant steam generated in the generator is introduced into a condenser, condensed to form refrigerant water and releases condensation heat QC. The heat supply heat medium heated in the absorber is discharged from the absorber and then is continuously introduced into the condenser, so that the heat supply heat medium further absorbs the condensation heat QCThereby further increasing the temperature.
And the refrigerant water formed in the condenser is passed into the evaporator to be evaporated again to form refrigerant vapor, whereby the first absorption heat pump forms a thermodynamic cycle.
The driving heat source pipeline in the generator can be high-temperature steam or high-temperature hot water, and in a specific embodiment, the driving heat source pipeline can be connected with the same steam heat source pipeline as the steam inlet of the sludge dryer 2. The system has a simple structure.
Of course, the waste heat heating device 7 may also be a device having a similar function as the first type absorption heat pump.
The sludge drying system in each of the above embodiments may further include a pre-dust collector 4 disposed between the waste steam outlet of the sludge drying machine 2 and the inlet of the first heat exchange channel, where the pre-dust collector 4 is configured to filter solid particles in waste steam flowing out of the sludge drying machine 2. The pre-dust remover 4 comprises a gas inlet, a gas outlet and a solid particle discharge port, the gas inlet is communicated with a waste steam outlet of the sludge dryer 2, the gas outlet is communicated with an inlet of the first heat exchange channel, and the solid particle discharge port is used for discharging filtered solid particles in the pre-dust remover 4.
Like this, dust precipitator 4 can filter the exhaust steam that sludge drying machine 2 flowed out, improves follow-up heat exchange efficiency, reaches the life-span of equipment in advance.
In addition, the sludge drying system can also comprise a fan 9, and an air inlet of the fan 9 is communicated with an air outlet of the cooler 5 so as to provide power for waste steam flowing in the system. That is, the waste steam can flow out of the sludge dryer 2 into subsequent equipment under the power of the waste steam re-blower 9, and flows out of the gas outlet of the cooler 5 after heat exchange in the cooler 5.
In the above embodiments, the sludge drying system may further include a wet sludge bin 1 and a deodorizer 10, the wet sludge bin 1 is connected to the upstream of the sludge dryer 2, the inlet of the blower 9 is also communicated with the gas outlet of the wet sludge bin 1, the air outlet of the blower 9 is communicated with the inlet of the deodorizer 10, and the deodorizer 10 is used for purifying the gas flowing into the deodorizer.
In addition, the sludge drying system in each of the above embodiments may further include a sludge cooler 3 and a dried sludge bin 6, the sludge cooler 3 is configured to cool the sludge flowing out from the sludge dryer 2, and the dried sludge bin 6 is connected to the downstream of the sludge cooler 3 and configured to dry the sludge flowing out from the sludge cooler 3.
The specific structures of the sludge dryer 2, the sludge cooler 3, the dried sludge bin 6, the wet sludge bin 1 and the deodorizer 10 in this document can refer to the prior art, and are not described herein again.
In one embodiment, the sludge drying system herein operates such that wet sludge enters the wet sludge bin 1 from the inlet pipe 1-1 and enters the sludge dryer 2 along the pipe 1-3 by the power of the sludge pump 8; high-grade steam enters through an inlet pipeline 2-1 of the sludge dryer 2 to provide heat for sludge drying, and the steam is condensed into liquid after releasing the heat and is discharged out of the system through an outlet pipeline 2-2. Wet sludge is heated in the sludge dryer 2, moisture contained in the wet sludge is evaporated, and water vapor (about 100 ℃) is discharged through a waste steam outlet pipeline 2-3; wherein: the high-temperature dry sludge enters a sludge cooling machine 3 for cooling through a sludge outlet pipeline 2-4; the coolant of the sludge cooler 3 is circulating water, the circulating water enters from a water inlet pipeline 3-1, and is discharged from a water outlet pipeline 3-2. The cooled dry sludge enters a dry sludge bin 6 through a sludge outlet pipeline 3-3 to finish the sludge drying process, and the dried sludge is discharged through a pipeline 6-1.
The micro-pressure waste steam discharged from a waste steam outlet pipeline 2-3 at the upper part of the sludge dryer 2 enters a pre-dust remover 4, less dust contained in the steam is separated, the dust passes through a solid particle discharge port pipeline 4-2 discharge system, the micro-pressure steam enters a cooler 5 through a gas outlet pipeline 4-1, micro-pressure steam condensate passes through a cooling water outlet pipeline 5-1 discharge system, a pipeline 5-2 is connected between an inlet of a second heat exchange channel and an outlet of a waste heat pipeline of the evaporator, and a pipeline 5-3 is connected between the outlet of the second heat exchange channel and an inlet of the waste heat pipeline of the evaporator so as to form a closed waste heat circulation loop with the waste heat pipeline in the evaporator and the second heat exchange channel of the cooler.
Wherein, a driving heat source inlet pipeline 7-3 and an outlet pipeline 7-4 of the waste heat heating equipment are respectively connected with an external high-temperature heat source. The inlet pipeline 7-1 and the outlet pipeline 7-2 of the medium temperature hot water are respectively connected with an external system pipeline.
The waste gas in the wet sludge bin 1 and the non-condensable gas discharged from the cooler 5 are introduced into an incineration deodorization system or a deodorizer 10 through a pipeline 9-1 by a fan 9, and are discharged into the atmosphere after being purified and reaching the discharge standard. Wherein the cooler 5 is communicated with an inlet pipeline 1-2-1 of a fan 9 through a noncondensable gas pipeline 1-2-2, and gas after the deodorizer is discharged to the external environment through a pipeline 10-1.
The sludge drying system provided by the utility model is introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above description is only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (6)
1. The sludge drying system comprises a sludge dryer (2), and is characterized by further comprising a cooler (5) and waste heat heating equipment (7), wherein the cooler (5) comprises a first heat exchange channel and a second heat exchange channel, the first heat exchange channel is communicated with a waste steam outlet of the sludge dryer (2), and the second heat exchange channel and a waste heat pipeline in the waste heat heating equipment (7) form a waste heat circulation loop;
when the waste heat circulation device works, a medium in the waste heat circulation loop flows through the second heat exchange channel to be heated in heat exchange with waste steam in the first heat exchange channel, and after the heated medium flows through a waste heat pipeline of the waste heat heating device (7), the waste heat in the waste heat circulation loop is converted into intermediate-grade energy.
2. The sludge drying system of claim 1, wherein the waste heat heating device comprises a first absorption heat pump, the first absorption heat pump comprises a generator, a condenser, an evaporator and an absorber, a waste heat pipeline inside the evaporator and the second heat exchange channel form the waste heat circulation loop, and during operation, refrigerant water flowing into the evaporator exchanges heat with waste heat medium inside the waste heat pipeline to form refrigerant steam.
3. The sludge drying system as claimed in any one of the claims 1 to 2, further comprising a pre-dust collector (4) disposed between the waste steam outlet of the sludge dryer (2) and the inlet of the first heat exchange channel for filtering solid particles in the waste steam flowing out of the sludge dryer (2); the pre-deduster (4) comprises a gas inlet, a gas outlet and a solid particle discharge port, the gas inlet is communicated with a waste steam outlet of the sludge dryer (2), the gas outlet is communicated with the first heat exchange channel inlet, and the solid particle discharge port is used for discharging solid particles filtered inside the pre-deduster (4).
4. The sludge drying system as claimed in any one of the claims 1 to 2, further comprising a blower (9), wherein an air inlet of the blower (9) is communicated with the gas outlet of the cooler (5) to provide motive power for the flow of the waste steam in the system.
5. The sludge drying system according to claim 4, further comprising a wet sludge bin (1) and a deodorizer (10), wherein the wet sludge bin is connected to the upstream of the sludge dryer (2), the inlet of the fan (9) is also communicated with the gas outlet of the wet sludge bin, the air outlet of the fan (9) is communicated with the inlet of the deodorizer (10), and the deodorizer (10) is used for purifying the gas flowing into the deodorizer.
6. The sludge drying system as claimed in any one of the claims 1 to 2, further comprising a sludge cooler (3) and a dried sludge bin (6), wherein the sludge cooler (3) is used for cooling the sludge flowing out from the sludge dryer (2), and the dried sludge bin (6) is connected with the downstream of the sludge cooler (3) and is used for drying the sludge flowing out from the sludge cooler (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020484829.4U CN211896635U (en) | 2020-04-03 | 2020-04-03 | Sludge drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020484829.4U CN211896635U (en) | 2020-04-03 | 2020-04-03 | Sludge drying system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211896635U true CN211896635U (en) | 2020-11-10 |
Family
ID=73272877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020484829.4U Active CN211896635U (en) | 2020-04-03 | 2020-04-03 | Sludge drying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211896635U (en) |
-
2020
- 2020-04-03 CN CN202020484829.4U patent/CN211896635U/en active Active
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