CN218755382U - Absorption heat pump sludge drying system - Google Patents
Absorption heat pump sludge drying system Download PDFInfo
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- CN218755382U CN218755382U CN202223436860.9U CN202223436860U CN218755382U CN 218755382 U CN218755382 U CN 218755382U CN 202223436860 U CN202223436860 U CN 202223436860U CN 218755382 U CN218755382 U CN 218755382U
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Abstract
The utility model provides an absorption heat pump sludge drying system, which comprises an absorption heat pump, a sludge drying machine, a cooling tower, a first circulation pipeline and a second circulation pipeline; the absorption heat pump comprises a heat absorption part and a heat release part, and the sludge drying machine comprises a circulating air duct, a condenser, an evaporator and a sludge conveying mechanism; the circulating air duct passes through the condenser, the evaporator and the sludge conveying mechanism, and the sludge conveying mechanism is arranged between an air outlet of the condenser and an air inlet of the evaporator; the first circulating pipeline passes through the heat release part and the condenser, and the condenser is used for transferring heat in the first circulating pipeline to the circulating air duct; the second circulating pipeline passes through the heat absorption part, the evaporator and the cooling tower, and the evaporator is used for transferring heat in the circulating air duct to the second circulating pipeline. Compared with the prior art, the utility model discloses an absorption heat pump provides the heat for the sludge drying machine to retrieve through the heat of absorption heat pump to the second heat transfer medium of evaporimeter output, improved the efficiency of sludge drying.
Description
Technical Field
The utility model relates to a sludge drying field especially relates to an absorption heat pump sludge drying system.
Background
Currently, with the continuous development of society, the national sewage treatment capacity and sludge yield increase year by year, with the gradual tightening of environmental protection policies, the sludge generated after the treatment of domestic wastewater and industrial wastewater needs to be properly treated, and sludge drying is an important means for realizing sludge reduction, harmlessness and resource utilization. The existing sludge drying machine mainly comprises a compressor, a condenser, a throttling element, an evaporator and a circulating fan for enabling air to form circulating airflow; the air is heated when flowing through the condenser and then flows through the sludge, and the moisture in the sludge is transferred to the air; then, air containing moisture is conveyed to the evaporator, the air is cooled, and the moisture in the air is condensed to form liquid water, so that the moisture content in the air is reduced; finally, the dehumidified air is sent back to the condenser to be heated again, so as to form a circulation and dry the sludge. However, the sludge drying machine in the prior art has the defects of small heating capacity and low energy utilization rate, so that the sludge drying efficiency is low.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model aims to provide an absorption heat pump sludge drying system that heating capacity is big, energy utilization is high to promote sludge drying system's mummification efficiency.
The utility model discloses an absorption heat pump sludge drying system, which comprises an absorption heat pump, a sludge drying machine, a cooling tower, a first circulation pipeline and a second circulation pipeline; the absorption heat pump comprises a heat absorption part for absorbing heat and a heat release part for releasing heat, the sludge drying machines comprise a plurality of sludge drying machines, and each sludge drying machine comprises a circulating air duct, a condenser, an evaporator and a sludge conveying mechanism;
for each sludge drier, the circulating air channel is also provided with a circulating fan, and the circulating fan is used for enabling air to circularly flow in the circulating air channel; the circulating air duct passes through the condenser, the evaporator and the sludge conveying mechanism, and the sludge conveying mechanism is arranged between an air outlet of the condenser and an air inlet of the evaporator;
the first circulation pipeline is used for containing water as a heat exchange medium, and a first circulation pump is arranged on the first circulation pipeline and used for enabling water to circularly flow in the first circulation pipeline; the first circulating pipeline passes through the heat release part and the condensers, and the condensers are used for transferring heat in the first circulating pipeline to the circulating air ducts;
the second circulation pipeline is used for containing water as a heat exchange medium, and a second circulation pump is arranged on the second circulation pipeline and used for enabling the water to circularly flow in the second circulation pipeline; the second circulation pipeline passes through the heat absorption part, the evaporators and the cooling tower, the input end of the cooling tower is connected with the output end of the heat absorption part, and the input end of each evaporator is connected with the output end of the cooling tower; each evaporator is used for transferring heat in each circulating air duct to the second circulating pipeline.
Furthermore, the water-saving device comprises a first water supplementing device, the first water supplementing device comprises a water tank and a water supplementing pump, the input end of the water supplementing pump is connected with the water tank, and the output end of the water supplementing pump is connected with the first circulating pipeline.
Further, the output end of the water replenishing pump is connected between the output end of the condenser and the input end of the heat release part.
Furthermore, the first water supplementing device further comprises a buffer tank connected with the output end of the water supplementing pump.
Furthermore, the output end of the water replenishing pump is provided with a check valve, and the water replenishing pump is connected with the first circulation pipeline and the buffer tank through the check valve.
Further, still include the demineralized water device, the input and the output of demineralized water device respectively with the water source and the water tank is connected.
Further, a liquid storage tank for collecting the cooled heat exchange medium is arranged below the cooling tower; the water storage tank is connected with the water storage tank, and the water replenishing valve is arranged on the water replenishing pipeline.
Further, the first circulation pump is disposed between an output end of the condenser and an input end of the heat radiating portion.
Further, the second circulation heat pump is arranged between the output end of the cooling tower and the input end of the evaporator.
Further, the first circulating pumps comprise a plurality of circulating pumps, and the first circulating pumps are connected in parallel; the second circulating pump comprises a plurality of circulating pumps, and the circulating pumps are connected in parallel.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. the absorption heat pump is used for providing heat for the sludge drying machine, and the absorption heat pump is used for recovering the heat of the second heat exchange medium output by the evaporator, so that the heating capacity and the energy utilization rate are improved, and the sludge drying efficiency is improved;
2. a plurality of sludge drying machines are arranged, so that the heat provided by the absorption heat pump is more fully utilized, and the sludge drying efficiency is further improved;
3. a first water replenishing device is arranged to keep the pressure of the first circulation pipeline in a normal range; and a second water supplementing device is arranged, so that the liquid level of a liquid storage tank of the cooling tower is kept in a normal range, and the normal operation of the equipment is ensured.
Drawings
Fig. 1 is a schematic view of the overall structure of the absorption heat pump sludge drying system of the present invention;
fig. 2 is a schematic structural diagram of a dryer of the absorption heat pump sludge drying system of the present invention.
In the figure: 10. an absorption heat pump; 11. a heat absorbing part; 12. a heat releasing section; 20. a sludge drier; 22. a condenser; 23. an evaporator; 24. a circulating fan; 25. a sludge conveying mechanism; 30. a cooling tower; 31. a liquid storage tank; 32. a heat exchange fan; 41. a first circulation pump; 51. a second circulation pump; 60. a water softening device; 71. a water tank; 72. a water replenishing pump; 73. a buffer tank; 81. a water replenishing pipeline; 82. and a water replenishing valve.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Currently, with the continuous development of society, the national sewage treatment capacity and sludge yield increase year by year, with the gradual tightening of environmental protection policies, the sludge generated after the treatment of domestic wastewater and industrial wastewater needs to be properly treated, and sludge drying is an important means for realizing sludge reduction, harmlessness and resource utilization. The existing sludge drying machine mainly comprises a compressor, a condenser, a throttling element, an evaporator and a circulating fan for enabling air to form circulating airflow; the air is heated when flowing through the condenser and then flows through the sludge, and the moisture in the sludge is transferred to the air; then, the air containing the moisture is conveyed to an evaporator, the temperature of the air is reduced, the moisture in the air is condensed to form liquid water, and therefore the moisture content in the air is reduced; finally, the dehumidified air is sent back to the condenser to be heated again, so as to form a circulation and dry the sludge. However, the sludge drying machine in the prior art has the defects of small heating capacity and low energy utilization rate, so that the sludge drying efficiency is low.
In order to solve the above technical problem, the utility model provides an absorption heat pump sludge drying system, as shown in fig. 1 and fig. 2, this absorption heat pump sludge drying system includes absorption heat pump 10, sludge drying machine 20, cooling tower 30, first circulation pipeline and second circulation pipeline. Specifically, the absorption heat pump 10 further includes a heat absorption portion 11 for absorbing heat and a heat release portion 12 for releasing heat, and the sludge drying machine 20 includes a circulating air duct, a condenser 22, an evaporator 23, and a sludge conveying mechanism 25.
The circulating air duct is also provided with a circulating fan 24, and the circulating fan 24 is used for enabling air to form circulating flow in the circulating air duct; the circulating air duct passes through the condenser 22, the evaporator 23 and the sludge conveying mechanism 25, and the sludge conveying mechanism 25 is arranged between an air outlet of the condenser 22 and an air inlet of the evaporator 23.
The first circulation pipeline is used for containing water as a heat exchange medium, a first circulation pump 41 is arranged on the first circulation pipeline, and the first circulation pump 41 is used for enabling the water to form a circulating flow in the first circulation pipeline; the first circulation line passes through the heat radiating portion 12 and the condenser 22, and the condenser 22 is used for transferring heat in the first circulation line to the circulation air duct.
The second circulation pipeline is used for containing water as a heat exchange medium, a second circulation pump 51 is arranged on the second circulation pipeline, and the second circulation pump 51 is used for enabling the water to form a circulating flow in the second circulation pipeline; the second circulation pipeline passes through the heat absorption part 11, the evaporator 23 and the cooling tower 30, the input end of the cooling tower 30 is connected with the output end of the heat absorption part 12, the input end of the evaporator 23 is connected with the output end of the cooling tower 30, the cooling tower 30 is provided with a heat exchange fan 32 for performing heat exchange between water input into the cooling tower 30 and air, and the temperature of the water output from the cooling tower 30 can be adjusted by adjusting the rotating speed of the heat exchange fan 32; the evaporator 23 is used for transferring heat in the circulating air duct to the second circulating line.
The working principle of the utility model is as follows:
1. in the first circulation line: the water in the first circulation line is heated by the heat radiating part 12 and then is delivered to the condenser 22, and the water radiates heat in the condenser 22 to increase the temperature of the air flowing through the condenser 22; the water flowing through the condenser 22 is sent back to the heat radiating portion 12, and the heat radiating portion 12 heats the water again, thereby forming a cycle;
2. in the second circulation line: the water in the second circulation pipeline is cooled by the heat absorption part 11 and the cooling tower 30, and then is conveyed to the evaporator 23, and the water absorbs heat in the evaporator 23, so that the temperature of the air flowing through the evaporator 23 is reduced; the water flowing through the evaporator 23 is sent back to the heat absorption part 11 and the cooling tower 30, and the heat absorption part 11 and the cooling tower 30 cool the water again, thereby forming a cycle;
3. in the circulating air duct: the air is heated by the condenser 22 and then is conveyed to the sludge conveying mechanism 25, the sludge on the sludge conveying mechanism 25 is heated by the air, moisture in the sludge is separated from the sludge after forming water vapor, and the water vapor and the air are conveyed to the evaporator 23 together; the temperature of the evaporator 23 is low, the water vapor is cooled by the evaporator 23 to form liquid water and then is discharged out of the circulating air channel, so that the water vapor is separated from the air, the separated air is conveyed to the condenser 22 to be heated again, and the circulation of the air is formed in the circulating air channel; 4. in the absorption heat pump 10: under the action of the input high-temperature heat source, the heat of the heat absorption part 11 is recovered and transferred to the heat release part 12, so that the temperature of the water flowing through the heat release part 12 is increased, and the temperature of the water flowing through the heat absorption part 11 is reduced; the absorption heat pump 10 improves energy efficiency by recovering heat from the heat absorption unit 11 and transferring the recovered heat to the heat release unit 12.
In a preferred embodiment, the absorption heat pump 10 is a lithium bromide absorption heat pump, which uses natural gas as a high-temperature heat source to transfer the heat of the heat absorption part 11 to the heat release part 12; in other embodiments, the absorption heat pump 10 may also be an ammonia absorption heat pump.
In order to improve the sludge drying capacity, in a preferred embodiment, the sludge drying machine 20 comprises a plurality of machines; specifically, the condensers 22 of the sludge drying machines 20 are connected in parallel and then connected to the first circulation pipeline, and the evaporators 23 of the sludge drying machines 20 are connected in parallel and then connected to the second circulation pipeline.
In the operation process of the equipment, if water in the first circulation pipeline is evaporated or leaked, the pressure in the first circulation pipeline is reduced, and the normal operation of the equipment is influenced; in order to replenish the first circulation line with water in order to maintain the first circulation line at a suitable pressure, in a preferred embodiment, a first water replenishing device is further included, which includes a water tank 71 and a water replenishing pump 72; the input end of the water replenishing pump 72 is connected with the water tank 71, and the output end of the water replenishing pump 72 is connected with the first circulation pipeline.
The water temperature stored in the water tank 71 is usually low, while the water temperature in the first circulation pipeline is high, so that the water temperature in the first circulation pipeline is easy to fluctuate in the water replenishing process, the outlet air temperature of the condenser 22 fluctuates, and the sludge drying effect is influenced; in order to reduce the fluctuation of the outlet air temperature of the condenser 22, in a preferred embodiment, the output end of the water replenishing pump 72 is connected between the output end of the condenser 22 and the input end of the heat radiating portion 12.
In order to reduce the water pressure fluctuation in the first circulation line and enable the apparatus to operate safely and stably, in a preferred embodiment, the first water replenishing means further includes a buffer tank 73 connected to an output end of the water replenishing pump 72. A buffer air bag is arranged in the buffer tank 73, and when the pressure of the first circulation pipeline is reduced, the buffer air bag expands under the action of differential pressure, so that water in the buffer tank 73 is discharged into the first circulation pipeline until the pressure of the buffer tank 73 is balanced with the pressure of the first circulation pipeline; when the pressure of the first circulation pipeline rises, the buffer air bag contracts under the action of the pressure difference, so that the water in the first circulation pipeline flows into the buffer tank 73 until the pressure of the buffer tank 73 is balanced with the pressure of the first circulation pipeline.
In order to prevent the pressure drop caused by the backflow of the water in the first circulation line from the water replenishing pump 72, in a preferred embodiment, the output end of the water replenishing pump 72 is provided with a check valve, and the water replenishing pump 72 is connected with the first circulation line and the buffer tank 73 through the check valve.
If hard water is directly used as a heat exchange medium, the hard water is easy to cause scaling of pipelines and heat exchangers due to high concentration of calcium and magnesium ions, and the heat exchange efficiency is influenced; therefore, in a preferred embodiment, the water softening device 60 is further included, and the input end and the output end of the water softening device 60 are respectively connected with the water source and the water tank 71; the ion exchange resin is provided in the water softening device 60, hard water from a water source flows through the ion exchange resin, calcium and magnesium ions in the hard water are adsorbed by the ion exchange resin, and then the hard water is converted into soft water and is output to the water tank 71.
A liquid storage tank 31 for collecting the water cooled by the cooling tower 30 is arranged below the cooling tower 30, the output end of the cooling tower 30 is connected with the liquid storage tank 31, and the water collected by the liquid storage tank 31 is conveyed to the evaporator 23 of the sludge drying machine 20. Therefore, if the liquid level of the liquid storage tank 31 is too low, the cooling tower 30 cannot effectively convey the cooled water to the evaporator 23, which not only affects the sludge drying effect, but also affects the safe operation of the sludge drying machine 20; therefore, in a preferred embodiment, the present invention further comprises a second water replenishing device, the second water replenishing device comprises a water replenishing pipeline 81 and a water replenishing valve 82, an output end of the water replenishing pipeline 81 is connected to the reservoir 31, the water replenishing valve 82 is disposed on the water replenishing pipeline 81, and water can be replenished to the reservoir 31 by adjusting the water replenishing valve 82, so as to maintain the water level of the reservoir 31 at a desired level.
In order to prevent the first circulation pump 41 from being affected by high-temperature water, so as to prolong the service life of the first circulation pump 41, in a preferred embodiment, the first circulation pump 41 is disposed between the output end of the condenser 22 and the input end of the heat releasing portion 12, and the temperature of the water in the first circulation pipeline is relatively low in this section, which is beneficial to reducing the effect of high temperature on the first circulation pump 41.
In order to reduce the distance between the second circulation pump 51 and the reservoir 31 of the cooling tower 30 to ensure that the second circulation pump 51 can operate normally, in a preferred embodiment, the second circulation pump 51 is disposed between the output end of the cooling tower 30 and the input end of the evaporator 23; it will be appreciated that the output of the cooling tower 30 is the output of the reservoir 31.
In order to prevent the malfunction of the first circulation pump 41 and the second circulation pump 51 from affecting the operation of the whole set of sludge drying system, in a preferred embodiment, the first circulation pump 41 includes a plurality of first circulation pumps 41, each first circulation pump 41 is connected in parallel, and when one or more first circulation pumps 41 malfunction, the circulation of the heat exchange medium in the first circulation pipeline is maintained by the other first circulation pumps 41; the second circulation pumps 51 are also provided with a plurality of second circulation pumps 51, and the second circulation pumps 51 are connected in parallel with each other, and similarly, when one or more of the second circulation pumps 51 fails, the circulation of the heat exchange medium in the second circulation pipeline can be maintained by the other second circulation pumps 51.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. the absorption heat pump is used for providing heat for the sludge drying machine, and the absorption heat pump is used for recovering the heat of the second heat exchange medium output by the evaporator, so that the heating capacity and the energy utilization rate are improved, and the sludge drying efficiency is improved;
2. a plurality of sludge drying machines are arranged, so that the heat provided by the absorption heat pump is more fully utilized, and the sludge drying efficiency is further improved;
3. a first water replenishing device is arranged to keep the pressure of the first circulation pipeline in a normal range; and a second water supplementing device is arranged, so that the liquid level of a liquid storage tank of the cooling tower is kept in a normal range, and the normal operation of the equipment is ensured.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (10)
1. The utility model provides an absorption heat pump sludge drying system which characterized in that:
comprises an absorption heat pump (10), a sludge drying machine (20), a cooling tower (30), a first circulating pipeline and a second circulating pipeline; the absorption heat pump (10) comprises a heat absorption part (11) for absorbing heat and a heat release part (12) for releasing heat, the sludge drying machines (20) comprise a plurality of machines, and each sludge drying machine (20) comprises a circulating air duct, a condenser (22), an evaporator (23) and a sludge conveying mechanism (25);
for each sludge drying machine (20), a circulating fan (24) is further arranged on the circulating air channel, and the circulating fan (24) is used for enabling air to circularly flow in the circulating air channel; the circulating air duct passes through the condenser (22), the evaporator (23) and the sludge conveying mechanism (25), and the sludge conveying mechanism (25) is arranged between an air outlet of the condenser (22) and an air inlet of the evaporator (23);
the first circulation pipeline is used for containing water as a heat exchange medium, a first circulation pump (41) is arranged on the first circulation pipeline, and the first circulation pump (41) is used for enabling water to circularly flow in the first circulation pipeline; the first circulating pipeline passes through the heat radiating part (12) and each condenser (22), and each condenser (22) is used for transferring heat in the first circulating pipeline to each circulating air duct;
the second circulation pipeline is used for containing water as a heat exchange medium, a second circulation pump (51) is arranged on the second circulation pipeline, and the second circulation pump (51) is used for enabling the water to circularly flow in the second circulation pipeline; the second circulation pipeline passes through the heat absorption part (11), the evaporators (23) and the cooling tower (30), the input end of the cooling tower (30) is connected with the output end of the heat absorption part (11), and the input end of each evaporator (23) is connected with the output end of the cooling tower (30); each evaporator (23) is used for transferring heat in each circulating air duct to the second circulating pipeline.
2. The absorption heat pump sludge drying system of claim 1, wherein:
the water-saving device is characterized by further comprising a first water supplementing device, wherein the first water supplementing device comprises a water tank (71) and a water supplementing pump (72), the input end of the water supplementing pump (72) is connected with the water tank (71), and the output end of the water supplementing pump (72) is connected with the first circulating pipeline.
3. The absorption heat pump sludge drying system of claim 2, wherein:
the output end of the water replenishing pump (72) is connected between the output end of the condenser (22) and the input end of the heat radiating part (12).
4. The absorption heat pump sludge drying system of claim 2, wherein:
the first water supplementing device further comprises a buffer tank (73) connected with the output end of the water supplementing pump (72).
5. The absorption heat pump sludge drying system of claim 4, wherein:
the output end of the water replenishing pump (72) is provided with a check valve, and the water replenishing pump (72) is connected with the first circulation pipeline and the buffer tank (73) through the check valve.
6. The absorption heat pump sludge drying system of claim 2, wherein:
the water softening device is characterized by further comprising a water softening device (60), wherein the input end and the output end of the water softening device (60) are respectively connected with a water source and the water tank (71).
7. The absorption heat pump sludge drying system according to any one of claims 1 to 6, wherein:
a liquid storage tank (31) for collecting the cooled heat exchange medium is arranged below the cooling tower (30);
the water replenishing device is characterized by further comprising a second water replenishing device, wherein the second water replenishing device comprises a water replenishing pipeline (81) and a water replenishing valve (82), the output end of the water replenishing pipeline (81) is connected with the liquid storage tank (31), and the water replenishing valve (82) is arranged on the water replenishing pipeline (81).
8. The absorption heat pump sludge drying system according to any one of claims 1 to 6, wherein:
the first circulation pump (41) is provided between an output end of the condenser (22) and an input end of the heat radiating portion (12).
9. The absorption heat pump sludge drying system according to any one of claims 1 to 6, wherein:
the second circulation pump (51) is arranged between the output of the cooling tower (30) and the input of the evaporator (23).
10. The absorption heat pump sludge drying system according to any one of claims 1 to 6, wherein:
the first circulating pump (41) comprises a plurality of circulating pumps, and the first circulating pumps (41) are mutually connected in parallel;
the second circulating pump (51) comprises a plurality of circulating pumps, and the circulating pumps (51) are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223436860.9U CN218755382U (en) | 2022-12-21 | 2022-12-21 | Absorption heat pump sludge drying system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223436860.9U CN218755382U (en) | 2022-12-21 | 2022-12-21 | Absorption heat pump sludge drying system |
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| Publication Number | Publication Date |
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| CN218755382U true CN218755382U (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223436860.9U Active CN218755382U (en) | 2022-12-21 | 2022-12-21 | Absorption heat pump sludge drying system |
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| CN (1) | CN218755382U (en) |
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- 2022-12-21 CN CN202223436860.9U patent/CN218755382U/en active Active
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