CN110040934B - Sludge drying and dehumidifying system and method based on absorption heat pump - Google Patents
Sludge drying and dehumidifying system and method based on absorption heat pump Download PDFInfo
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- CN110040934B CN110040934B CN201910320132.5A CN201910320132A CN110040934B CN 110040934 B CN110040934 B CN 110040934B CN 201910320132 A CN201910320132 A CN 201910320132A CN 110040934 B CN110040934 B CN 110040934B
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- 239000010802 sludge Substances 0.000 title claims abstract description 77
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 49
- 238000001035 drying Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 19
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims abstract description 64
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000001816 cooling Methods 0.000 claims abstract description 45
- 238000009833 condensation Methods 0.000 claims abstract description 7
- 230000005494 condensation Effects 0.000 claims abstract description 7
- 238000007791 dehumidification Methods 0.000 claims abstract description 6
- 238000012423 maintenance Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 57
- 239000000498 cooling water Substances 0.000 claims description 33
- 239000006096 absorbing agent Substances 0.000 claims description 10
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 235000012055 fruits and vegetables Nutrition 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a sludge drying and dehumidifying system based on an absorption heat pump, which comprises a dryer, an air cooling and dehumidifying device, an air circulating fan, an air heating device and a lithium bromide absorption heat pump, wherein the air cooling and dehumidifying device is arranged on the dryer; 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 used for standby when the lithium bromide absorption heat pump needs 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 condensation and dehumidification processes of the sludge can be recovered while the drying and dehumidifying of the sludge are realized, the energy consumption in the drying and dehumidifying processes of the sludge is reduced, the drying and dehumidifying efficiency of the sludge is improved, the system is economical to operate, and no secondary pollution of air is caused.
Description
Technical Field
The invention belongs to the technical field of sludge drying, and particularly relates to a sludge drying and dehumidifying system based on an absorption heat pump, which is widely applied to the drying fields of municipal sludge, industrial sludge (printing and dyeing, papermaking, electroplating, chemical industry, leather, pharmacy and the like) and the like.
Background
With the acceleration of urban process and the rapid development of industry in China, the urban sewage and the industrial sewage are treated and improved, a large amount of sludge is inevitably generated in the process of collecting and disposing the urban sewage and the industrial sewage, and the sludge has the characteristics of high organic matter content, easy rot and odor and high water content, contains various toxic and harmful substances, and greatly threatens the life and health of people.
At present, the main method for harmless treatment of sludge is sludge incineration, for example, the sludge incineration is mixed into coal burning of a power plant, the sludge incineration is a reduction, stabilization and harmless treatment method, the sludge is treated in an incineration mode, organic matters in the sludge can be completely carbonized to generate stable inorganic matters through incineration, the incineration residues are odorless, sterile and harmless, the incineration residues can be used for making bricks, manufacturing cement additives and the like, although the sludge incineration can reduce the volume to the greatest extent, the water content of the sludge is up to 95% -98%, the incineration energy consumption is high, 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 standard requirements, and then harmless resource treatments such as gasification, blending, composting or building material raw materials are carried out, so that the sludge needs to be dried and dehumidified.
At present, the sludge is mainly dried and dehumidified by direct heating, namely, the sludge is heated to more than 100 ℃ by using the forms of steam, flue gas, electric heating and the like, so that the water content of the sludge is changed into water vapor to be directly discharged into the atmosphere.
Disclosure of Invention
The invention provides a sludge drying and dehumidifying system based on an absorption heat pump, which can realize sludge drying and dehumidifying, recover heat in the sludge condensation and dehumidifying process, reduce energy consumption in the sludge drying and dehumidifying process and improve the efficiency of sludge drying and dehumidifying.
The technical scheme adopted for solving the technical problems is as follows: 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 is connected with the air cooling and dehumidifying device through a cooling water pipeline A to form a circulating closed circuit, the condenser is connected with the air heating device through a hot water pipeline C, the air heating device is connected with the absorber through a hot water pipeline A, and the absorber is connected with 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 the 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 provided, which are respectively connected to the cooling water pipes A through the cooling water pipes B; the cooling water pipeline B is respectively provided with a valve C and a valve D.
Further, a valve A and a valve B are arranged at the inlet and the outlet of the evaporator, and a cooling water pump is arranged on the cooling water pipeline A.
Further, a hot water pump and a valve F are sequentially arranged on a hot water pipeline C, wherein the hot water pipeline C is connected with the air heating device, of the condenser.
Further, 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.
Further, the dryer is a belt dryer and comprises a wet sludge inlet, a dry sludge outlet, a dry hot air inlet, a warm and wet air outlet and a sludge conveying device.
A second object of the present invention is to provide a method for drying and dehumidifying sludge based on an absorption heat pump, which is to use the sludge drying and dehumidifying system based on an absorption heat pump of the present invention;
the method comprises the following steps:
1) Opening a valve A, a valve B, a valve E, a valve F, a valve G and a valve H; closing the valve C, the valve D, the valve I and the valve J; operating a cooling water pump and a hot water pump; the steam is used as a high-temperature heat source to drive the lithium bromide absorption heat pump to operate, low-temperature heat source water in the lithium bromide absorption heat pump evaporator enters the air cooling and dehumidifying device through the cooling water pump to serve as a power cold source for condensation and dehumidification of the air cooling and dehumidifying device, and water discharged from the lithium bromide absorption heat pump condenser enters the air heating device through the hot water pump to serve as a power heat source for heating and raising the temperature of the air heating device; the dry hot air is subjected to heat-humidity exchange with the sludge through the surface of the sludge in the dryer, so that the water is continuously evaporated after the sludge absorbs heat, meanwhile, the passed dry hot air is mixed with water vapor to be changed into warm and humid air, the warm and humid air is discharged from the dryer and then enters an air cooling and dehumidifying device, the air enters an air heating device through an air circulating fan after condensation and dehumidification in the air cooling and dehumidifying device, and the air enters the dryer for the next cycle after heating and temperature rising in the air heating device;
2) When the lithium bromide absorption heat pump needs to be shut down for maintenance, the valve C, the valve D, the valve I and the valve J are opened; closing the valve A, the valve B, the valve E, the valve F, the valve G and the valve H; operating a cooling water pump; closing the hot water pump; at this time, circulating water of the cooling device enters the air cooling and dehumidifying device through the cooling water pump to condense and dehumidify air, and steam enters the air heating device through the steam pipeline B to heat the air.
The beneficial effects of the invention are as follows:
1. according to the invention, the lithium bromide absorption heat pump is used as a power heat source and a power cold source for drying and dehumidifying the sludge, and the lithium bromide absorption heat pump is used for condensing and dehumidifying air in the sludge drying process and recovering heat, so that the heat in the sludge condensing and dehumidifying process can be recovered while the sludge drying and dehumidifying process is realized, the energy consumption in the sludge drying and dehumidifying process is reduced, and the sludge drying and dehumidifying efficiency is improved.
2. The lithium bromide absorption heat pump of the invention 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, so that no tail gas is discharged, and secondary pollution of air is avoided.
3. By adopting the cooling device, when the lithium bromide absorption heat pump is stopped for maintenance, the effective operation of the system is still ensured, and the drying and dehumidifying efficiency of the sludge is ensured.
Drawings
The invention will be further described 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, dryer, 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 transfer apparatus, 3, air heating apparatus, 4, air cooling and dehumidification apparatus, 5, air circulation blower, 6, cooling apparatus, 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 condensate outlet conduit, 20, cooling water conduit A,21, cooling water conduit B,22, hot water conduit B,24, hot water conduit C,25, steam conduit A,26, steam condensate conduit A,27, steam condensate conduit B,28.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the sludge drying and dehumidifying system based on the 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 cooling and dehumidifying device 4 are connected through a cooling water pipeline A20 to form a circulation 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 1-4 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 pipeline A26 is connected to the air heating device 3 through a steam condensate pipeline B28, and a valve I15 is arranged on the steam condensate pipeline B28.
Further, there are also 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 outlet of the evaporator 1-1, and a cooling water pump 17 is arranged on the cooling water pipeline A20.
Further, a hot water pump 18 and a valve F12 are sequentially arranged on a hot water pipe C24 of the condenser 1-3 connected to the air heating device 3.
Further, a valve G13 is arranged on a pipeline connected with the steam pipeline A25 of the regenerator 1-4, and a valve H14 is arranged on a pipeline connected with the steam condensate pipeline A26; the hot water pipeline A22 is provided with a valve E11.
Further, 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 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 the condensed water is discharged through the air condensation water outlet pipeline 19 without discharging tail gas, so that secondary pollution to air can be avoided.
The method for drying and dehumidifying the sludge by using the system comprises the following steps:
1) Opening valve A7, valve B8, valve E11, valve F12, valve G13 and valve H14; closing valve C9, valve D10, valve I15 and valve J16; a cooling water pump 17 and a hot water pump 18 are operated; the steam is used as a high-temperature heat source to drive the operation of the lithium bromide absorption heat pump 1, low-temperature heat source water in the evaporator 1-1 of the lithium bromide absorption heat pump 1 enters the air cooling and dehumidifying device 4 through the cooling water pump 17 and is used as a power cold source for condensation and dehumidification of the air cooling and dehumidifying device 4, and water discharged from the condenser 1-3 of the lithium bromide absorption heat pump 1 enters the air heating device 3 through the hot water pump 18 and is used as a power heat source for heating and raising the temperature of the air heating device 3; the dry hot air is subjected to heat-moisture exchange with the sludge through the surface of the sludge in the dryer 2, so that the water is continuously evaporated after the sludge absorbs heat, meanwhile, the passed dry hot air is mixed with water vapor to be changed into warm and humid air, the warm and humid air is discharged from the dryer 2 and then enters the air cooling and dehumidifying device 4, the condensed and dehumidified air enters the air heating device 3 through the air circulating fan 5 after being condensed and dehumidified in the air cooling and dehumidifying device 4, and the heated air enters the dryer 2 to enter the next cycle after being heated in the air heating device 3;
2) When the lithium bromide absorption heat pump 1 needs to be shut down for maintenance, the valve C9, the valve D10, the valve I15 and the valve J16 are opened; closing valve A7, valve B8, valve E11, valve F12, valve G13 and valve H14; operating the cooling water pump 17; turning off the hot water pump 18; at this time, the circulating water of the cooling device 6 enters the air cooling 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 the air.
The heat source of the lithium bromide absorption heat pump 1 is not limited to steam, and energy sources such as natural gas, city gas, heat conduction oil, hot water and the like can be adopted.
The application of the sludge drying and dehumidifying system based on the absorption heat pump is not limited to sludge drying, but can 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 foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (5)
1. The sludge drying and dehumidifying system based on the 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);
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 circulation 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;
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 arranged 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);
a cooling device (6) is also arranged, and the cooling devices (6) are respectively connected to the cooling water pipelines A (20) through cooling water pipelines B (21); the cooling water pipeline B (21) is respectively provided with a valve C (9) and a valve D (10); the cooling device (6) is used when the absorption heat pump is stopped for overhauling;
the condenser (1-3) is connected to a hot water pipeline C (24) of the air heating device (3), and a hot water pump (18) and a valve F (12) are sequentially arranged on the hot water pipeline C.
2. A sludge drying and dehumidifying system based on an absorption heat pump as claimed in claim 1, wherein a valve a (7) and a valve B (8) are arranged at the inlet and outlet of the evaporator (1-1), and a cooling water pump (17) is arranged on the cooling water pipeline a (20).
3. A sludge drying and dehumidifying system based on an absorption heat pump as claimed in claim 2, wherein the regenerator (1-4) is provided with a valve G (13) on the line connected to the steam line a (25) and a valve H (14) on the line connected to the steam condensate line a (26); the hot water pipeline A (22) is provided with a valve E (11).
4. A sludge drying and dehumidifying system based on an absorption heat pump as claimed in claim 3, wherein the dryer (2) is a belt dryer comprising 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).
5. A method for drying and dehumidifying sludge based on an absorption heat pump, which is characterized in that the method uses the sludge drying and dehumidifying system based on the absorption heat pump in claim 4; the method comprises the following steps:
1) opening a valve A (7), a valve B (8), a valve E (11), a valve F (12), a valve G (13) and a valve H (14); closing the valve C (9), the valve D (10), the valve I (15) and the valve J (16); a cooling water pump (17) and a hot water pump (18) are operated; the steam is used as a high-temperature heat source to drive the operation of the lithium bromide absorption heat pump (1), low-temperature heat source water in an evaporator (1-1) of the lithium bromide absorption heat pump (1) enters an air cooling and dehumidifying device (4) through a cooling water pump (17) and is 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) and is used as a power heat source for heating and raising the temperature of the air heating device (3); the dry hot air is subjected to heat-moisture exchange with the sludge through the surface of the sludge in the dryer (2), so that the water is continuously evaporated after the sludge absorbs heat, meanwhile, the passed dry hot air is mixed with water vapor to be changed into warm and humid air, the warm and humid air is discharged from the dryer (2) and then enters an air cooling and dehumidifying device (4), the condensed and dehumidified air enters an air heating device (3) through an air circulating fan (5), and the heated air enters the dryer (2) to enter the next circulation after being heated in the air heating device (3);
2) When the lithium bromide absorption heat pump (1) needs to be shut down for maintenance, the valve C (9), the valve D (10), the valve I (15) and the valve J (16) are opened; closing the valve A (7), the valve B (8), the valve E (11), the valve F (12), the valve G (13) and the valve H (14); operating a cooling water pump (17); turning off the hot water pump (18); at the moment, circulating water of the cooling device (6) enters the air cooling and dehumidifying device (4) through the cooling water pump (17) to condense and dehumidify air, and steam enters the air heating device (3) through the steam pipeline B (27) to heat and raise the temperature of the air.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910320132.5A CN110040934B (en) | 2019-04-19 | 2019-04-19 | Sludge drying and dehumidifying system and method based on absorption heat pump |
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| CN201910320132.5A CN110040934B (en) | 2019-04-19 | 2019-04-19 | Sludge drying and dehumidifying system and method based on absorption heat pump |
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| CN110040934B true CN110040934B (en) | 2024-04-09 |
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|---|---|---|---|---|
| CN110255856A (en) * | 2019-07-29 | 2019-09-20 | 湖南清源智造设备有限公司 | Steam heat pump sludge drying system |
| CN110482827B (en) * | 2019-07-31 | 2022-04-01 | 通富微电子股份有限公司 | Drying system |
| CN110550847A (en) * | 2019-10-18 | 2019-12-10 | 湖南清源华建环境科技有限公司 | Energy-saving heat pump sludge drying system |
| CN112484420A (en) * | 2020-12-15 | 2021-03-12 | 同方节能装备有限公司 | Tobacco baking and dehumidifying device |
| CN113173687B (en) * | 2021-04-27 | 2023-04-21 | 扬州大学 | Cold and hot source type sludge low-temperature drying system |
| CN113461301A (en) * | 2021-07-23 | 2021-10-01 | 大唐环境产业集团股份有限公司 | Sludge steam drying system and method coupled with dehumidification heat pump |
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