CN210085240U - Sludge drying and dehumidifying system based on absorption heat pump - Google Patents
Sludge drying and dehumidifying system based on absorption heat pump Download PDFInfo
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- CN210085240U CN210085240U CN201920547045.9U CN201920547045U CN210085240U CN 210085240 U CN210085240 U CN 210085240U CN 201920547045 U CN201920547045 U CN 201920547045U CN 210085240 U CN210085240 U CN 210085240U
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Abstract
The utility model provides a sludge drying and dehumidifying system based on an absorption heat pump, which comprises a drier, an air cooling and dehumidifying device, an air circulating fan, an air heating device and a lithium bromide absorption heat pump; the dryer, the air cooling and dehumidifying device, the air circulating fan and the air heating device are sequentially connected in series; the air cooling and dehumidifying device and the air heating device are respectively connected with the lithium bromide absorption heat pump; and a cooling device is also arranged, and the lithium bromide absorption heat pump is standby when needing to be shut down for maintenance. The lithium bromide absorption heat pump is used as a power heat source and a power cold source for drying and dehumidifying the sludge, so that the heat in the sludge condensation and dehumidification process can be recovered while the sludge is dried and dehumidified, the energy consumption in the sludge drying and dehumidification process is reduced, the sludge drying and dehumidification efficiency is improved, the system is economical to operate, and secondary pollution to air is avoided.
Description
Technical Field
The utility model belongs to the technical field of the sludge drying, concretely relates to sludge drying dehumidification system based on absorption heat pump is extensive in drying fields such as municipal sludge and industrial sludge (printing and dyeing, papermaking, electroplating, chemical industry, leather, pharmacy etc.).
Background
Along with the acceleration of the urbanization process and the rapid development of the industry in China, the treatment of urban sewage and industrial sewage is improved, a large amount of sludge is inevitably generated in the collection and treatment processes of the urban sewage and the industrial sewage, the sludge has the characteristics of high organic matter content, easy decay and odor generation and high water content, and contains various toxic and harmful substances, thereby greatly threatening the life and health of people.
At present, the main method for harmless treatment of sludge is sludge incineration, for example, sludge incineration is doped into power plant coal for incineration, the sludge incineration is a reduction, stabilization and harmless treatment method, the sludge is treated by adopting an incineration mode, all organic matters in the sludge can be carbonized into stable inorganic matters by incineration, the incinerated residue is odorless, sterile and harmless, the incinerated residue can be used for making bricks, manufacturing cement additives and the like, although the sludge incineration can reduce the volume to the maximum extent, the water content of the sludge is up to 95% -98%, the direct incineration energy consumption is higher, wet sludge with the water content of more than 80% is required to be dried to dry sludge with the water content of 10% -30% according to relevant standards, and then the dry sludge is subjected to harmless resource recycling treatment such as gasification, doped incineration, composting or building material raw materials, so the sludge needs to be dried and dehumidified firstly.
At present, direct heating is mainly adopted for drying and dehumidifying sludge in China, namely the sludge is heated to more than 100 ℃ by using forms of steam, flue gas, electric heating and the like, so that the moisture of the sludge is changed into water vapor to be directly discharged into the atmosphere, and the drying mode has the problems of high energy consumption, easy generation of secondary pollution, low drying efficiency and the like.
SUMMERY OF THE UTILITY MODEL
For solving current sludge drying dehumidification system energy resource consumption big, the running cost is high, polluted environment, drying efficiency low scheduling problem, the utility model provides a sludge drying dehumidification system based on absorption heat pump, when this system can realize sludge drying dehumidification, retrieve the heat of sludge condensation dehumidification in-process, reduce the energy resource consumption of sludge drying dehumidification in-process, and improve the efficiency of sludge drying dehumidification.
The utility model provides a technical scheme that its technical problem adopted is: a sludge drying and dehumidifying system based on an absorption heat pump comprises a dryer, an air cooling and dehumidifying device, an air circulating fan, an air heating device and a lithium bromide absorption heat pump; the dryer, the air cooling and dehumidifying device, the air circulating fan and the air heating device are sequentially connected in series; the air cooling and dehumidifying device and the air heating device are respectively connected with the lithium bromide absorption heat pump.
Further, the lithium bromide absorption heat pump comprises an evaporator, an absorber, a condenser and a regenerator; the evaporator and the air cooling and dehumidifying device are connected through a cooling water pipeline A to form a circulating closed circuit, the condenser is connected to the air heating device through a hot water pipeline C, the air heating device is connected to the absorber through the hot water pipeline A, and the absorber is connected to the condenser through a hot water pipeline B; the regenerator is respectively connected to the steam pipeline A and the steam condensate pipeline A through pipelines.
Further, the steam pipeline A is connected to an air heating device through a steam pipeline B, and a valve J is arranged on the steam pipeline B; the steam condensate pipeline A is connected to the air heating device through a steam condensate pipeline B, and a valve I is arranged on the steam condensate pipeline B.
Further, cooling devices are also arranged and are respectively connected to the cooling water pipelines A through the cooling water pipelines B; and the cooling water pipeline B is respectively provided with a valve C and a valve D.
Further, the inlet and outlet of the evaporator are provided with a valve A and a valve B, and the cooling water pipeline A is provided with a cooling water pump.
Further, a hot water pump and a valve F are sequentially arranged on a hot water pipeline C of the condenser connected to the air heating device.
Furthermore, a valve G is arranged on a pipeline of the regenerator connected to the steam pipeline A, and a valve H is arranged on a pipeline connected to the steam condensate pipeline A; and a valve E is arranged on the hot water pipeline A.
Furthermore, the dryer is a belt dryer and comprises a wet sludge inlet, a dry sludge outlet, a hot and dry air inlet, a warm and humid air outlet and a sludge conveying device.
The utility model has the advantages that:
1. the utility model discloses a lithium bromide absorption heat pump carries out condensation dehumidification and heat recovery as mud stoving dehumidification's power heat source and power cold source, utilizes lithium bromide absorption heat pump to carry out condensation dehumidification and heat recovery to the air of mud stoving process, when can realizing mud stoving dehumidification, retrieves the heat of mud condensation dehumidification in-process, reduces the energy resource consumption of mud stoving dehumidification in-process, and has improved the efficiency of mud stoving dehumidification.
2. The lithium bromide absorption heat pump of the utility model provides a power heat source and a power cold source for drying and dehumidifying sludge at the same time, and the operation is economical; the sludge moisture is condensed in the air cooling and dehumidifying device and is discharged in a condensed water mode, no tail gas is discharged, and no secondary pollution is caused to the air.
3. And a cooling device is adopted, so that when the lithium bromide absorption heat pump is stopped and overhauled, the effective operation of the system is still ensured, and the efficiency of drying and dehumidifying sludge is ensured.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a system diagram of the present invention;
wherein: 1. lithium bromide absorption heat pump, 1-1 evaporator, 1-2 absorber, 1-3 condenser, 1-4 regenerator, 2 drier, 2-1 wet sludge inlet, 2-2 dry sludge outlet, 2-3 dry hot air inlet, 2-4 warm and wet air outlet, 2-5 sludge conveying device, 3 air heating device, 4 air cooling and dehumidifying device, 5 air circulating fan, 6 cooling device, 7 valve A, 8 valve B, 9 valve C, 10 valve D, 11 valve E, 12 valve F, 13 valve G, 14 valve H, 15 valve I, 16 valve J, 17 cooling water pump, 18 hot water pump, 19 air condensed water outlet pipeline, 20 cooling water pipeline A, 21 cooling water pipeline B, 22. the hot water pipeline A, 23, the hot water pipeline B, 24, the hot water pipeline C, 25, the steam pipeline A, 26, the steam condensate pipeline A, 27, the steam pipeline B, 28 and the steam condensate pipeline B.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a sludge drying and dehumidifying system based on an absorption heat pump comprises a dryer 2, an air cooling and dehumidifying device 4, an air circulating fan 5, an air heating device 3, and a lithium bromide absorption heat pump 1; the dryer 2, the air cooling and dehumidifying device 4, the air circulating fan 5 and the air heating device 3 are sequentially connected in series; the air cooling and dehumidifying device 4 and the air heating device 3 are respectively connected with the lithium bromide absorption heat pump 1.
Further, the lithium bromide absorption heat pump 1 comprises an evaporator 1-1, an absorber 1-2, a condenser 1-3 and a regenerator 1-4; the evaporator 1-1 and the air temperature-reducing and dehumidifying device 4 are connected through a cooling water pipeline A20 to form a circulating closed circuit, the condenser 1-3 is connected to the air heating device 3 through a hot water pipeline C24, the air heating device 3 is connected to the absorber 1-2 through a hot water pipeline A22, and the absorber 1-2 is connected to the condenser 1-3 through a hot water pipeline B23; the regenerators 1 to 4 are respectively connected to a steam pipeline A25 and a steam condensate pipeline A26 through pipelines.
Further, the steam pipeline a25 is connected to the air heating device 3 through a steam pipeline B27, and a valve J16 is arranged on the steam pipeline B27; the steam condensate pipe A26 is connected to the air heating device 3 through a steam condensate pipe B28, and a valve I15 is arranged on the steam condensate pipe B28.
Further, there are provided cooling devices 6, the cooling devices 6 being connected to the cooling water pipes a20 through cooling water pipes B21, respectively; the cooling water pipe B21 is provided with a valve C9 and a valve D10, respectively.
Further, a valve A7 and a valve B8 are arranged at the inlet and the outlet of the evaporator 1-1, and a cooling water pump 17 is arranged on the cooling water pipeline A20.
Further, the condenser 1-3 is connected to a hot water pipe C24 of the air heating device 3, and a hot water pump 18 and a valve F12 are sequentially provided.
Further, a valve G13 is arranged on a pipeline of the regenerator 1-4 connected to the steam pipeline A25, and a valve H14 is arranged on a pipeline connected to the steam condensate pipeline A26; a valve E11 is arranged on the hot water pipeline A22.
Further, the dryer 2 is a belt dryer and comprises a wet sludge inlet 2-1, a dry sludge outlet 2-2, a hot and dry air inlet 2-3, a warm and wet air outlet 2-4 and a sludge conveying device 2-5.
The evaporated sludge moisture is condensed in the air cooling and dehumidifying device 4, and condensed water is discharged through the air condensed water outlet pipeline 19, so that tail gas is not discharged, and secondary pollution to air is not caused.
The method for drying and dehumidifying the sludge by applying the system comprises the following steps:
1) opening a valve A7, a valve B8, a valve E11, a valve F12, a valve G13 and a valve H14; closing valve C9, valve D10, valve I15, valve J16; operating a cooling water pump 17 and a hot water pump 18; steam is used as a high-temperature heat source to drive the lithium bromide absorption heat pump 1 to run, low-temperature heat source water in an evaporator 1-1 of the lithium bromide absorption heat pump 1 enters the air cooling and dehumidifying device 4 through a cooling water pump 17 to be used as a power cold source for condensation and dehumidification of the air cooling and dehumidifying device 4, and water discharged from a condenser 1-3 of the lithium bromide absorption heat pump 1 enters the air heating device 3 through a hot water pump 18 to be used as a power heat source for heating and warming of the air heating device 3; the dry and hot air is subjected to heat and moisture exchange with the sludge through the surface of the sludge in the dryer 2, so that moisture is continuously evaporated after the sludge absorbs heat, meanwhile, the passing dry and hot air is mixed with water vapor to become warm and humid air, the warm and humid air is discharged from the dryer 2 and enters the air cooling and dehumidifying device 4, the air is condensed and dehumidified in the air cooling and dehumidifying device 4, then enters the air heating device 3 through the air circulating fan 5, and is heated and warmed in the air heating device 3 and then enters the dryer 2 to enter the next cycle;
2) when the lithium bromide absorption heat pump 1 needs to be shut down for maintenance, opening the valve C9, the valve D10, the valve I15 and the valve J16; closing valve a7, valve B8, valve E11, valve F12, valve G13, valve H14; operating the cooling water pump 17; the hot water pump 18 is turned off; at this time, the circulating water of the cooling device 6 enters the air temperature-reducing and dehumidifying device 4 through the cooling water pump 17 to condense and dehumidify the air, and the steam enters the air heating device 3 through the steam pipeline B27 to heat and warm the air.
The heat source of the lithium bromide absorption heat pump 1 is not limited to steam, and can also adopt energy sources such as natural gas, city gas, heat conducting oil, hot water and the like.
The application of the sludge drying and dehumidifying system based on the absorption heat pump is not limited to sludge drying, and can also be applied to drying places such as agricultural product drying, marine product drying, industrial drying, tobacco drying, grain drying, medicinal material drying, fruit and vegetable drying and the like.
The above description is only the specific implementation manner of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the design of the present invention within the technical scope of the present invention.
Claims (8)
1. A sludge drying and dehumidifying system based on an absorption heat pump is characterized by comprising a dryer (2), an air cooling and dehumidifying device (4), an air circulating fan (5), an air heating device (3) and a lithium bromide absorption heat pump (1); the dryer (2), the air cooling and dehumidifying device (4), the air circulating fan (5) and the air heating device (3) are sequentially connected in series; the air cooling and dehumidifying device (4) and the air heating device (3) are respectively connected with the lithium bromide absorption heat pump (1).
2. The sludge drying and dehumidifying system based on the absorption heat pump as claimed in claim 1, wherein the lithium bromide absorption heat pump (1) comprises an evaporator (1-1), an absorber (1-2), a condenser (1-3), and a regenerator (1-4); the evaporator (1-1) is connected with the air cooling and dehumidifying device (4) through a cooling water pipeline A (20) to form a circulating closed circuit, the condenser (1-3) is connected to the air heating device (3) through a hot water pipeline C (24), the air heating device (3) is connected to the absorber (1-2) through a hot water pipeline A (22), and the absorber (1-2) is connected to the condenser (1-3) through a hot water pipeline B (23); the regenerators (1-4) are respectively connected to a steam pipeline A (25) and a steam condensate pipeline A (26) through pipelines.
3. The absorption heat pump-based sludge drying and dehumidifying system as claimed in claim 2, wherein the steam pipeline a (25) is connected to the air heating device (3) through a steam pipeline B (27), and a valve J (16) is disposed on the steam pipeline B (27); the steam condensate pipeline A (26) is connected to the air heating device (3) through a steam condensate pipeline B (28), and a valve I (15) is arranged on the steam condensate pipeline B (28).
4. An absorption heat pump based sludge drying and dehumidifying system as claimed in claim 2, wherein a cooling device (6) is further provided, said cooling device (6) is respectively connected to said cooling water pipeline a (20) through a cooling water pipeline B (21); and the cooling water pipeline B (21) is respectively provided with a valve C (9) and a valve D (10).
5. The absorption heat pump-based sludge drying and dehumidifying system as claimed in claim 2, wherein a valve a (7) and a valve B (8) are disposed at an inlet and an outlet of the evaporator (1-1), and a cooling water pump (17) is disposed on the cooling water pipeline a (20).
6. An absorption heat pump based sludge drying and dehumidifying system as claimed in claim 2, wherein the condenser (1-3) is connected to a hot water pipeline C (24) of the air heating device (3) and is provided with a hot water pump (18) and a valve F (12) in sequence.
7. The absorption heat pump-based sludge drying and dehumidifying system as claimed in claim 2, wherein a valve G (13) is disposed on a pipeline of the regenerator (1-4) connected to the steam pipeline a (25), and a valve H (14) is disposed on a pipeline connected to the steam condensate pipeline a (26); and a valve E (11) is arranged on the hot water pipeline A (22).
8. The absorption heat pump-based sludge drying and dehumidifying system as claimed in claim 1, wherein the dryer (2) is a belt dryer, and comprises a wet sludge inlet (2-1), a dry sludge outlet (2-2), a dry hot air inlet (2-3), a warm and humid air outlet (2-4), and a sludge conveying device (2-5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920547045.9U CN210085240U (en) | 2019-04-19 | 2019-04-19 | Sludge drying and dehumidifying system based on absorption heat pump |
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| CN201920547045.9U CN210085240U (en) | 2019-04-19 | 2019-04-19 | Sludge drying and dehumidifying system based on absorption heat pump |
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| CN210085240U true CN210085240U (en) | 2020-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110040934A (en) * | 2019-04-19 | 2019-07-23 | 松下制冷（大连）有限公司 | A kind of sludge drying dehumidification system and method based on absorption heat pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110040934A (en) * | 2019-04-19 | 2019-07-23 | 松下制冷（大连）有限公司 | A kind of sludge drying dehumidification system and method based on absorption heat pump |
| CN110040934B (en) * | 2019-04-19 | 2024-04-09 | 松下制冷（大连）有限公司 | Sludge drying and dehumidifying system and method based on absorption heat pump |
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