CN208883692U - A kind of double loop sludge Analysis of Heat Pump Drying System - Google Patents
A kind of double loop sludge Analysis of Heat Pump Drying System Download PDFInfo
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- CN208883692U CN208883692U CN201820907672.4U CN201820907672U CN208883692U CN 208883692 U CN208883692 U CN 208883692U CN 201820907672 U CN201820907672 U CN 201820907672U CN 208883692 U CN208883692 U CN 208883692U
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Abstract
The utility model relates to a kind of double loop sludge Analysis of Heat Pump Drying System, the double loop sludge Analysis of Heat Pump Drying System includes heat insulation plate house, and the heat insulation plate house is provided with the solar energy heat conducting circulatory system, hot air circulating system and sludge circulation system.Dry heat pump main frame is set in the middle part of heat insulation plate house by the utility model, and up and down partition, which is arranged, makes air-flow form double loop, is shortened gas flow paths, is improved the drying effect of sludge.Sludge Analysis of Heat Pump Drying System in double loop provided by the utility model replaces traditional open loop method of evaporating using closed loop dehumanization method to realize the drying of sludge, unitary design, sludge is dried in the heat that comprehensive utilization solar energy, heat pump, residual-heat exchanger generate, and has saved the energy.
Description
Technical field
The utility model relates to drying sludge fields, and in particular, to a kind of double loop sludge Analysis of Heat Pump Drying System.
Background technique
Different processes can generate different types of waste material in paper making process, wherein paper mill sludge is paper-making process
The end product of wastewater treatment, main component are dusts and can not be by isolated paper pulp, felt fiber and fillers.Except containing short
Outside fibrous matter, organic matter and nitrogen, phosphorus, chlorine, heavy metal, parasitic ovum and pathogenic bacteria etc. are detrimental to health also containing there are many
Ingredient, it is necessary to properly be disposed.Conventional treatment method is using landfill and to burn, and sludge is handled with land-fill method, in sludge
Ink, pigment, chemical agent etc. easily permeated the ground by stratum, to the very harmful of underground water source, once by underground water dirt
Dye, will lean on spontaneous recovery that will need the time of last 100 years.
Incineration method can be realized the peculiar advantage of innoxious, minimizing and recycling increasingly by the weight of people due to it
Depending on.Before paper mill sludge directly burn, in order to avoid heat waste, moisture percentage in sewage sludge need to be reduced to 39% or less (sludge
75 or more mass dryness fraction), but because drying cost Gao Erwei is greatly developed.
Therefore, it is necessary to design a kind of at low cost, high-efficient sludge Analysis of Heat Pump Drying System.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of double loop sludge heat pump drying system
System, the utility model is by the mixing hot wind from solar heat-exchange coil pipe, condenser coil and residual-heat exchanger to insulation board
Sludge in room carries out circulating-heating.
To achieve the above objectives, the present invention adopts the following technical solutions:
A kind of double loop sludge Analysis of Heat Pump Drying System, the double loop sludge Analysis of Heat Pump Drying System includes heat insulation plate house, institute
It states heat insulation plate house and is provided with the solar energy heat conducting circulatory system, hot air circulating system and sludge circulation system；
The solar energy heat conducting circulatory system include the solar heat-collection plate being set to outside heat insulation plate house, the first vertical pipe,
Second vertical pipe, horizontal tube and solar heat-exchange coil pipe, the solar heat-collection plate and solar heat-exchange coil pipe are perpendicular by first
Straight tube, the second vertical pipe are connected with horizontal tube；
The hot air circulating system includes the drying heat pump main frame being set in the middle part of heat insulation plate house, the dry heat pump main frame
It is inside disposed with room temperature cooling water coil, evaporator coil, normal temperature circulation water coil, condenser coil and residual-heat exchanger,
The evaporator coil is connected with condenser coil, and is respectively arranged with compressor and section in two side ducts that are connected of the two
Device is flowed, is additionally provided with condensate draining pipe on the evaporator coil；The top of the heat insulation plate house and dry heat pump main frame
Top between and heat insulation plate house bottom and dry heat pump main frame bottom between be respectively arranged with the first active clapboard,
The heat insulation plate house is divided into two arid regions by first active clapboard；The opposite drying heat pump of first active clapboard
The damp and hot wind inlet for making damp and hot wind enter room temperature cooling water coil is separately provided on host and for blowing dry-heat air
To the hot-blast outlet of sludge；The solar heat-exchange coil pipe is set in dry heat pump main frame, and is set to normal temperature circulation water pond
Between pipe and condenser coil, or it is set to after residual-heat exchanger sequence；
The sludge circulation system include the enterprising material mouth of heat insulation plate house for being symmetrically disposed on two arid regions, discharge port and
The sludge conveyer belt and electronic runner being symmetrically disposed in heat insulation plate house, the feed inlet, sludge conveyer belt and discharge port are successively
It is connected, the electronic driven by rotating wheel sludge conveyer belt transmits sludge.
Heat-conducting medium in the solar energy heat conducting circulatory system absorbs solar energy in the solar heat-collection plate outside heat insulation plate house
Afterwards, by the first vertical pipe of heat insulation plate house medial surface to flowing downward into solar heat-exchange coil pipe, thermally conductive Jie after heat exchange
Matter continues flowing and flows up into solar heat-collection plate by the second vertical pipe of another medial surface of heat insulation plate house and continue to absorb heat,
Form circulation loop.Wherein, the first vertical pipe, the second vertical pipe and horizontal tube can not need stringent thermal insulation property, because
The heat dissipation capacity of pipeline is present on the inside of heat insulation plate house, can carry out auxiliary heating to the sludge in heat insulation plate house.
Damp and hot wind in hot air circulating system enters heat pump drying host by damp and hot wind inlet, first in room temperature cooling water pond
It is cooled into clammy wind in pipe, then passes through evaporator coil, the moisture condensation in clammy wind, condensed water is expelled directly out insulation board
Room flows through normal temperature circulation water coil by the cold wind after evaporator coil and is preheated, subsequently into the sun with sewage formal layout
Energy heat exchange coil is heated, and is entered back into the condenser coil of heat pump main frame and is heated, and is finally entered residual-heat exchanger and is added again
Heat forms dry-heat air, is sent by air blower between sludge conveyer belt and sludge is dried.In the present invention, the sun
Energy heat exchange coil also can be set after heat pump main frame, and hot wind is introduced into the condenser coil of heat pump main frame and heats, then into
Enter residual-heat exchanger to be heated, finally enters solar heat-exchange coil pipe.The order of placement of heating device can be according to waste heat heat source temperature
The conditions such as heat-conducting medium temperature, heat pump power are adjusted in degree, solar heat-collection plate.
After system run all right, hot wind is formed in the airflow channel convective heat transfer in heat insulation plate house between sludge conveyer belt
Steady air flow tissue eventually passes back to the damp and hot wind inlet of dry heat pump main frame, and hot wind flows in heat insulation plate house always, is closed loop
Dehumidification mode, without leaking, dust will not be scattered to the external world, avoid causing secondary pollution to ambient enviroment, meet hygienic requirements for closing.
Hot wind passes through heating for multiple times, can achieve higher temperature, has preferable drying sludge effect.
Wherein, the heat source of residual-heat exchanger can be the industrial waste heats such as high-temperature flue gas or waste water and gas waste heat.
Dry heat pump main frame is placed in the middle part of heat insulation plate house by the utility model, and up and down partition is arranged, and to form air-flow double
Circuit shortens gas flow paths, improves the drying effect of sludge.Sludge heat pump drying in double loop provided by the utility model
System replaces traditional open loop method of evaporating using closed loop dehumanization method to realize the drying of sludge, unitary design, comprehensive benefit
Sludge is dried with the heat that solar energy, heat pump, residual-heat exchanger generate, has saved the energy.
Preferably, described two first active clapboards are movably connected with by first articulated mounting one end in the heat preservation
The top and bottom of board house.
Preferably, first active clapboard can be rotated centered on the first articulated mounting between 0~180 °, can also
Rest on 0 °, 90 °, 180 ° of positions.
In the present invention, between the top of the heat insulation plate house and the top of dry heat pump main frame and insulation board
It is also respectively provided with the second active clapboard between the bottom in room and the bottom of dry heat pump main frame, first active clapboard and the
It is arranged between two active clapboards in right-angled intersection, and the second active clapboard is divided into independent two from centre by the first active clapboard
Part；The right-angled intersection junction of first active clapboard and the second active clapboard is provided with multidirectional articulated mounting.Described two
A second active clapboard is movably connected with by the second articulated mounting in the top and bottom of the heat insulation plate house.It is worth explanation
, the length of second active clapboard straight down or upwards is advisable with not blocking the sludge conveyer belt.
First active clapboard, the second active clapboard can rotate between 0 ° and 180 °, when the first active clapboard, second
When active clapboard is respectively positioned on 90 ° of positions, air-flow forms four circuits, and there are four arid regions altogether for sludge dry system inside, into one
Step shortens gas flow paths, when dry-heat air can be made to reach damp and hot wind inlet from hot-blast outlet, the temperature humidity of damp and hot wind
Variation is smaller than the temperature humidity variation in common sludge Analysis of Heat Pump Drying System, and gas flow temperature is higher, improves the dry effect of sludge
Fruit.
Preferably, circulating pump is provided in first vertical pipe.
Preferably, the damp and hot wind inlet and dry-heat air exit are provided with strainer.
Preferably, the feed inlet is provided with charging preheating apparatus；The discharge port is provided with discharging heat recovery apparatus.
When sewage sludge feed, feed sludge is preheated using charging preheating apparatus, is returned using discharging heat when discharging
Receiving apparatus carries out heat recovery to high temperature sludge.
Preferably, the discharge outlet is additionally provided with discharge bucket.
Preferably, the hot air circulating system further includes the drum for being used to for hot wind being blown to sludge being set at hot-blast outlet
Blower.
Preferably, the sludge conveyer belt is to be obliquely installed.
Preferably, the inclined angle is 10~20 °.
Preferably, the sludge conveyer belt is multilayer crawler belt pipeline organization.Sludge is fed by heat insulation plate house top, more
In heat insulation plate house bottom discharge after layer circulation.
In the present invention, control system, temperature-detecting device and wet are provided in the sludge Analysis of Heat Pump Drying System
Detection device is spent, the control system controls system by the data of temperature-detecting device and humidity detector, makes
Dry-heat air temperature and humidity at blower export, and the damp and hot air temperature of damp and hot wind inlet of dry heat pump main frame and wet
Degree maintains in suitable numberical range.
Preferably, the dry-heat air temperature at the blower export is 60~70 DEG C, humidity 10%RH, described damp and hot
The damp and hot air temperature of wind inlet is 50 DEG C, humidity 80%RH.
Compared with prior art, the utility model has the following beneficial effects:
(1) dry heat pump main frame is placed in the middle part of heat insulation plate house by the utility model, controls gas flow loop by active clapboard,
Gas flow paths can be shortened, improve the drying effect of sludge；
(2) the utility model realizes the drying of sludge using closed loop dehumanization method instead of traditional open loop method of evaporating,
By the way of closed loop, low temperature, dehumidifying, without leaking, dust will not be scattered to the external world, avoid causing ambient enviroment secondary dirt for closing
Dye, meets hygienic requirements；
(3) sludge Analysis of Heat Pump Drying System provided by the utility model designs for integral type, and installation is simple, performance is stablized, and is
Efficiency of uniting is little with outside climatic relationship, can guarantee drying effect under any area, any weather conditions；
(4) sludge is dried in the heat that the utility model comprehensive utilization solar energy, heat pump, residual-heat exchanger generate,
The energy consumption for greatly reducing drying sludge process, has saved the energy.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property
It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is a kind of structural schematic diagram for double loop sludge Analysis of Heat Pump Drying System that the utility model embodiment 1 provides；
Fig. 2 is that the first active clapboard articulated position of the sludge Analysis of Heat Pump Drying System that embodiment 1 provides and rotational angle show
It is intended to；
The insulated building structure of one piece of active clapboard of setting is overlooked in the sludge Analysis of Heat Pump Drying System that Fig. 3 provides for embodiment 1
Figure.
Specific embodiment
It is practical below in conjunction with this to enable the purpose of this utility model, feature, advantage more obvious and understandable
Attached drawing in new embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that under
The described embodiments are only a part of the embodiments of the utility model in face, and not all embodiment.Based on the utility model
In embodiment, all other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, fall within the protection scope of the utility model.
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
Embodiment 1
Fig. 1 is a kind of structural schematic diagram of double loop sludge Analysis of Heat Pump Drying System provided in this embodiment, and Fig. 2 is sludge hot
The the first active clapboard articulated position and rotational angle schematic diagram of pump drying system, Fig. 3 are to be arranged in sludge Analysis of Heat Pump Drying System
The insulated building structure top view of one piece of active clapboard.As shown, the double loop sludge Analysis of Heat Pump Drying System includes insulation board
Room 1, the heat insulation plate house 1 are provided with the solar energy heat conducting circulatory system, hot air circulating system and sludge circulation system；
The solar energy heat conducting circulatory system includes the solar heat-collection plate 2 being set to outside heat insulation plate house 1, the first vertical pipe
27, the second vertical pipe 28, horizontal tube and solar heat-exchange coil pipe 17, the solar heat-collection plate 2 and solar heat-exchange coil pipe 17
It is connected by the first vertical pipe 27, the second vertical pipe 28 with horizontal tube；Due to the first vertical pipe 28 of heat insulation plate house two sidewalls
It is arranged on the inside of heat insulation plate house with the horizontal tube of the second vertical pipe 27 and bottom, the first vertical pipe 28, the second vertical pipe 27
Stringent thermal insulation property can not be needed with horizontal tube, it, can be to guarantor because the heat dissipation capacity of pipeline is present on the inside of heat insulation plate house
Sludge in warm board house carries out auxiliary heating.
The hot air circulating system includes being set to the drying heat pump main frame 26 at 1 middle part of heat insulation plate house, the dry heat pump
Room temperature cooling water coil 23, evaporator coil 21, normal temperature circulation water coil 19, condenser coil 16 are disposed in host 26
With residual-heat exchanger 15, the evaporator coil 21 is connected with condenser coil 16, and in two side ducts that are connected of the two
It is respectively arranged with compressor 20 and throttling set 18, is additionally provided with condensate draining pipe 22 on the evaporator coil 21；It is described
Between the top of heat insulation plate house 1 and the top of the dry heat pump main frame 26 and bottom of heat insulation plate house 1 and dry heat pump main frame 26
Bottom between be respectively arranged with the first active clapboard 11,11 ', first active clapboard 11,11 ' is by the heat insulation plate house 1
It is divided into two arid regions；It is separately provided for making in the opposite drying heat pump main frame 26 of first active clapboard 11,11 '
Damp and hot wind enters the damp and hot wind inlet 24 of room temperature cooling water coil 23 and the hot-blast outlet 13 for making dry-heat air blow to sludge；
The solar heat-exchange coil pipe 17 is set in dry heat pump main frame 26, and is set to normal temperature circulation water coil 19 and condenser pan
Between pipe 16, or it is set to after 15 sequence of residual-heat exchanger；After system run all right, hot wind sludge in heat insulation plate house 1 is passed
Send the airflow channel convective heat transfer between band 5, form steady air flow tissue, eventually pass back to the damp and hot wind of heat pump drying host 26 into
Mouth 24, hot wind flows in heat insulation plate house always, is closed loop dehumidification mode, without leaking, dust will not be scattered to the external world, avoid for closing
Secondary pollution is caused to ambient enviroment, meets hygienic requirements.
The sludge circulation system includes the enterprising material mouth 3 of heat insulation plate house 1 for being symmetrically disposed on two arid regions, discharge port
8 and the sludge conveyer belt 6 and electronic runner 5 that are symmetrically disposed in heat insulation plate house 1, the feed inlet 3, sludge conveyer belt 6 and go out
Material mouth 8 is sequentially connected, and the electronic runner 5 drives sludge conveyer belt 6 to transmit sludge.
Wherein, described two first active clapboards 11,11 ' are movably connected with by the first articulated mounting 10,10 ' one end
In the top and bottom of the heat insulation plate house 1.First active clapboard 11,11 ' is centered on the first articulated mounting 10,10 '
It can be rotated between 0~180 °.When the first active clapboard 11,11 ' is located at 90 ° of positions, air-flow forms double loop, shortens gas
Body flow path, when dry-heat air can be made to reach damp and hot wind inlet 24 from hot-blast outlet 13, the temperature humidity of damp and hot wind changes
Smaller than the temperature humidity variation in common sludge Analysis of Heat Pump Drying System, gas flow temperature is higher, improves the drying effect of sludge.
In the present embodiment, control system, temperature-detecting device and humidity are provided in the sludge Analysis of Heat Pump Drying System
Detection device, the control system control system by the data of temperature-detecting device and humidity detector, make to rouse
Dry-heat air temperature and humidity at fan outlet, and dry the damp and hot air temperature and humidity of the damp and hot wind inlet of heat pump main frame
It maintains in suitable numberical range.
It circulates in view of the setting of active clapboard may reduce two sides gas in heat insulation plate house, leads to two sides uneven drying
Weighing apparatus, the first active clapboard 11,11 ' can be controlled by control system and rest on 0 ° or 180 ° of positions, when partition volume is less big
When, it can also be swung between 0 ° and 180 ° of positions, promote gaseous exchange.
In the present embodiment, the sludge conveyer belt 6 is multilayer crawler belt pipeline organization, and multilayer crawler belt is set as inclination and puts
It sets, tilt angle is preferably 10 ~ 20 °, and inclined crawler belt can optimize air current composition, reduces hot wind free convection resistance
Power avoids steam from condensing in the crawler belt of upper layer, to make full use of blower power, improves system effectiveness.In addition, also according to reality
Multilayer crawler belt 6, can be set as horizontal positioned, i.e., inclination angle is zero degree by the space in place and the demand of processing sludge quantity.
Optionally, multilayer crawler belt is chosen as tilting to 26 direction of center heat pump main drying, is also chosen as to insulated building 1
Side wall inclination, i.e. tilt angle can be 10 ~ 20 °, or be 160 ~ 170 °.
Circulating pump 12 is provided in first vertical pipe 27, the damp and hot wind inlet 24 and dry-heat air export equal at 13
It is provided with strainer 25.The feed inlet is provided with charging preheating apparatus；The discharge port is provided with discharging heat recovery apparatus.It is dirty
When mud is fed, feed sludge is preheated using charging preheating apparatus, using discharging heat recovery apparatus to height when discharging
Warm sludge carries out heat recovery.
The discharge outlet is additionally provided with discharge bucket, and the hot air circulating system further includes the use being set at hot-blast outlet
In the air blower that hot wind is blown to sludge.
Above-described specific embodiment, to the purpose of this utility model, technical scheme and beneficial effects carried out into
One step is described in detail, it should be understood that being not used to limit the foregoing is merely specific embodiment of the present utility model
Determine the protection scope of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced
It changes, improve, should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of double loop sludge Analysis of Heat Pump Drying System, which is characterized in that the double loop sludge Analysis of Heat Pump Drying System includes protecting
Warm board house (1), the heat insulation plate house (1) are provided with the solar energy heat conducting circulatory system, hot air circulating system and sludge circulation system；
The solar energy heat conducting circulatory system includes the solar heat-collection plate (2) being set to heat insulation plate house (1) outside, the first vertical pipe
(27), the second vertical pipe (28), horizontal tube and solar heat-exchange coil pipe (17), the solar heat-collection plate (2) and solar energy change
Hot coil (17) is connected by the first vertical pipe (27), the second vertical pipe (28) with horizontal tube；
The hot air circulating system includes the drying heat pump main frame (26) being set in the middle part of heat insulation plate house (1), the dry heat pump
Room temperature cooling water coil (23), evaporator coil (21), normal temperature circulation water coil (19), condensation are disposed in host (26)
Device coil pipe (16) and residual-heat exchanger (15), the evaporator coil (21) is connected with condenser coil (16), and the two phase
It is respectively arranged with compressor (20) and throttling set (18) in two side ducts of connection, is also set up on the evaporator coil (21)
There are condensate draining pipe (22)；Between the top of the heat insulation plate house (1) and the top of dry heat pump main frame (26) and keep the temperature
It is respectively arranged with the first active clapboard (11,11 ') between the bottom of board house (1) and the bottom of dry heat pump main frame (26), it is described
The heat insulation plate house (1) is divided into two arid regions by the first active clapboard (11,11 ')；First active clapboard (11,
11 ') it in opposite drying heat pump main frame (26) is separately provided for that damp and hot wind is made to enter the wet of room temperature cooling water coil (23)
Hot wind inlet (24) and for making dry-heat air blow to the hot-blast outlet (13) of sludge；Solar heat-exchange coil pipe (17) setting
It is interior in dry heat pump main frame (26), and be set between normal temperature circulation water coil (19) and condenser coil (16), or be set to
After residual-heat exchanger (15) sequence；
The sludge circulation system includes heat insulation plate house (1) the enterprising material mouth (3) for being symmetrically disposed on two arid regions, discharge port
(8) it is passed with the sludge conveyer belt (6) and electronic runner (5) that are symmetrically disposed in heat insulation plate house (1), the feed inlet (3), sludge
Band (6) and discharge port (8) is sent to be sequentially connected, the electronic runner (5) drives sludge conveyer belt (6) to transmit sludge.
2. double loop sludge Analysis of Heat Pump Drying System according to claim 1, which is characterized in that described two first active clapboards
(11,11 ') are movably connected with by the first articulated mounting (10,10 ') in the top and bottom of the heat insulation plate house (1).
3. double loop sludge Analysis of Heat Pump Drying System according to claim 1, which is characterized in that first active clapboard (11,
11 ') it can be rotated between 0~180 ° centered on the first articulated mounting (10,10 ').
4. double loop sludge Analysis of Heat Pump Drying System according to claim 1, which is characterized in that on first vertical pipe (27)
It is provided with circulating pump (12).
5. double loop sludge Analysis of Heat Pump Drying System according to claim 1, which is characterized in that the damp and hot wind inlet (24) and
Strainer (25) are provided at dry-heat air outlet (13).
6. double loop sludge Analysis of Heat Pump Drying System according to claim 1, which is characterized in that the feed inlet (3) is provided with
It feeds preheating apparatus (4).
7. double loop sludge Analysis of Heat Pump Drying System according to claim 1, which is characterized in that the discharge port (8) is provided with
It discharges heat recovery apparatus (7).
8. double loop sludge Analysis of Heat Pump Drying System according to claim 1, which is characterized in that also set at the discharge port (8)
It is equipped with discharge bucket (9).
9. double loop sludge Analysis of Heat Pump Drying System according to claim 1, which is characterized in that the sludge conveyer belt is inclination
Setting.
10. double loop sludge Analysis of Heat Pump Drying System according to claim 9, which is characterized in that the sludge conveyer belt inclination
Angle be 10~20 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820907672.4U CN208883692U (en) | 2018-06-12 | 2018-06-12 | A kind of double loop sludge Analysis of Heat Pump Drying System |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820907672.4U CN208883692U (en) | 2018-06-12 | 2018-06-12 | A kind of double loop sludge Analysis of Heat Pump Drying System |
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| Publication Number | Publication Date |
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| CN208883692U true CN208883692U (en) | 2019-05-21 |
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ID=66505454
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| CN201820907672.4U Expired - Fee Related CN208883692U (en) | 2018-06-12 | 2018-06-12 | A kind of double loop sludge Analysis of Heat Pump Drying System |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115959810A (en) * | 2022-12-05 | 2023-04-14 | 华北电力大学（保定） | Device for drying municipal sludge by indirect air cooling natural ventilation counter-flow cooling tower |
-
2018
- 2018-06-12 CN CN201820907672.4U patent/CN208883692U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115959810A (en) * | 2022-12-05 | 2023-04-14 | 华北电力大学（保定） | Device for drying municipal sludge by indirect air cooling natural ventilation counter-flow cooling tower |
| CN115959810B (en) * | 2022-12-05 | 2024-03-01 | 华北电力大学（保定） | Device for drying municipal sludge by indirect air cooling natural ventilation countercurrent cooling tower |
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Granted publication date: 20190521 Termination date: 20210612 |