CN113371968B - Medium-temperature heat pump sludge drying device and sludge drying method - Google Patents
Medium-temperature heat pump sludge drying device and sludge drying method Download PDFInfo
- Publication number
- CN113371968B CN113371968B CN202011328156.4A CN202011328156A CN113371968B CN 113371968 B CN113371968 B CN 113371968B CN 202011328156 A CN202011328156 A CN 202011328156A CN 113371968 B CN113371968 B CN 113371968B
- Authority
- CN
- China
- Prior art keywords
- heat
- air
- heat pump
- pump system
- external circulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Abstract
The application relates to a moderate temperature heat pump sludge drying device and a sludge drying method, the moderate temperature heat pump sludge drying device comprises: the heat pump system comprises a drying oven, a heat exchange prying block, an external circulation air fan and a plurality of heat pump systems; the baking is carried outThe box, the heat exchange pry block and the external circulation air fan are communicated to form an external circulation structure; each heat pump system comprises a heat source driving device, a heat compensator and a heat exchanger which are communicated with each other; the heat exchanger is arranged in the heat exchange pry block, and the heat compensator is arranged in the oven; the oven is provided with the air supply opening, and the heat exchanger export in the heat transfer sled piece is provided with the suction opening. This application realizes the sludge drying through extrinsic cycle structure and heat pump system, through taking out the heat of evaporimeter export minimum grade, mends low-temperature low-humidity new trend again, realizes the cold supplement to maintain the energy balance of system through discharging low grade energy, reduced the system
Loss, increase of system
Efficiency.
Description
Technical Field
The application relates to the field of sludge drying, in particular to a medium-temperature heat pump sludge drying device and a sludge drying method.
Background
The conventional heat pump sludge drying unit belongs to a low-temperature closed drying unit, and the heat pump has the working capacity of a compressor, so that the heating capacity is constantly larger than the refrigerating capacity. Because the air temperature (low-grade heat source) at the outlet of the evaporator of the low-temperature type closed drying unit is only 35 ℃ at most, normal heat discharge cannot be realized, only part of condensation heat (high-grade heat source) of the heat pump can be discharged, part of heat released by the heat pump is used for evaporating water in sludge, and part of heat is discharged to realize heat balance of a closed system, the high-grade heat source cannot be completely utilized, and the comprehensive energy utilization rate is low.
Based on this, this application provides a medium temperature heat pump sludge drying system, utilizes the difference on system's operating mode and the heat transfer principle, realizes that heat pump heating capacity is whole to be utilized, is a high-efficient energy-conserving technical application.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, the application provides a medium-temperature heat pump sludge drying device and a sludge drying method.
In a first aspect, the present application provides a medium temperature heat pump sludge drying device, the medium temperature heat pump sludge drying device includes: the heat pump system comprises a drying oven, a heat exchange prying block, an external circulation air fan and a plurality of heat pump systems; the drying oven, the heat exchange pry block and the external circulation air fan are communicated with each other to form an external circulation structure; each heat pump system comprises a heat source driving device, a heat compensator and a heat exchanger which are communicated with each other; the heat exchanger is arranged in the heat exchange pry block, and the heat compensator is arranged in the oven; the drying oven is provided with an air supplementing opening, and an air suction opening is formed in an outlet of a heat exchanger in the heat exchange prying block.
Optionally, the suction opening is provided with an exhaust fan, the exhaust fan is connected to the deodorization system.
Optionally, the air supply port is provided with an air supply control device, the exhaust fan is used for exhausting air from the heat exchange pry block through the air exhaust port, and the air supply control device is used for supplying air to the oven through the air supply port; wherein air suction and air supplement are performed simultaneously.
Optionally, the air suction amount of the exhaust fan is consistent with the air supplement amount of the air supplement control device.
Optionally, the heat supplementing device comprises a first condenser and a first subcooler, and the heat exchanging device comprises an evaporator.
Optionally, the heat source driving device comprises a screw compressor, a shell-and-tube economizer and a reservoir; the tube side of the shell-and-tube economizer is respectively connected with the first end of the liquid storage device and the first end of the evaporator; the shell side of the shell-and-tube economizer is connected with the second end of the evaporator and the air suction end of the screw compressor respectively, the discharge end of the screw compressor is connected with the first end of the first condenser, and the first end and the second end of the first subcooler are connected with the second end of the first condenser and the second end of the liquid storage device respectively.
Optionally, the oven is sequentially provided with a head module, a preheating module, an air inlet module, a middle module and a tail module; the air inlet module and the tail module are respectively provided with an external circulating air inlet and an external circulating air return inlet; the first condenser is arranged in the intermediate module, and the first subcooler is arranged in the preheating module.
Optionally, the plurality of heat pump systems includes a first heat pump system and a second heat pump system; the heat exchange pry block is also internally provided with a second condenser and a second subcooler; the discharge port of the screw compressor of the first heat pump system, the second condenser, the second subcooler and the liquid storage device of the first heat pump system are sequentially connected; the second condenser and the second subcooler are arranged on the heat exchange pry block, and the evaporator of the second heat pump system, the evaporator of the first heat pump system, the second subcooler and the second condenser are sequentially arranged along the wind direction of external circulating wind preset in the heat exchange pry block.
In a second aspect, the present application provides a sludge drying method for the intermediate-temperature heat pump sludge drying device as described in any one of the above, wherein the sludge drying method includes;
generating external circulation air in the external circulation structure through an external circulation fan;
the heat exchanger of the heat pump system exchanges heat with the external circulating air in the heat exchange prying block to obtain thermal state external circulating air
Guiding the thermal state external circulation air to the oven through the external circulation structure, and performing heat compensation on the thermal state external circulation air through a heat compensator of the heat pump system so as to dry sludge in the oven;
in the drying process, air is pumped from the outer circulation structure through an air suction opening, and air is supplied to the outer circulation structure through an air supply opening.
Optionally, the sludge drying method further includes:
in the drying process, air extraction and air supplement are carried out simultaneously, and the air extraction amount and the air supplement amount are kept consistent.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
the sludge drying is realized through outer loop structure and heat pump system in this application embodiment, through taking out the heat of evaporimeter export minimum grade, mends low-temperature low-humidity new trend again, realizes the cold supplement to maintain the energy balance of system through discharging low-grade energy, reduced the system
Loss, increase of system
Efficiency.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic diagram of a moderate temperature heat pump sludge drying apparatus provided in various embodiments of the present application;
FIG. 2 is a schematic view of an oven provided in various embodiments of the present application;
FIG. 3 is a schematic view of a heat exchange skid provided in various embodiments of the present application;
FIG. 4 is a schematic diagram of a heat pump system provided in various embodiments of the present application;
FIG. 5 is a pressure-enthalpy diagram of a conventional heat pump system;
fig. 6 is a pressure-enthalpy diagram of a medium-temperature heat pump system according to various embodiments of the present application.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
Example one
The embodiment of the invention provides a medium-temperature heat pump sludge drying device, which comprises: the heat pump system comprises an oven 100, a heat exchange pry block 200, an external circulation air fan 400 and a plurality of heat pump systems; the drying oven, the heat exchange pry block and the external circulation air fan are communicated to form an external circulation structure; each heat pump system comprises a heat source driving device, a heat compensator and a heat exchanger which are communicated with each other; the heat exchanger is arranged in the heat exchange pry block, and the heat compensator is arranged in the oven; the oven is provided with air supply opening 101, and the heat exchanger export in the heat transfer sled piece is provided with suction opening 201.
The intermediate-temperature heat pump sludge drying device provided by the embodiment of the invention can realize sludge drying by external circulation air by utilizing an external circulation structure, an air suction opening is arranged at the outlet of a heat exchanger of the heat exchange pry block, an air supplement opening is arranged in the oven, and when the device operates, the exhaust fan 202 can extract a small amount of external circulation air through the air suction opening to discharge the external circulation air outwards, so that the system can operate at negative pressure without odor leakage risk, the energy balance of the system is maintained by discharging low-grade energy, and the system is reduced
Loss, increase of system
Efficiency. And an air supplementing opening is arranged in the oven, fresh low-temperature air (average temperature is 15 ℃) is introduced, so that the concentration of pollutants in the system is reduced, and part of cold energy is input into the system.
In some embodiments, the thermal make-up device comprises a first condenser 102 and a first subcooler 103, and the heat exchange device comprises evaporators (a first evaporator 205 and a second evaporator 206). The suction opening is provided with an exhaust fan, which is connected to the deodorizing system 203. Optionally, the air supplementing opening is provided with an air supplementing control device, the exhaust fan is used for exhausting air from the heat exchange pry block through the air exhaust opening, and the air supplementing control device is used for supplementing air to the oven through the air supplementing opening; wherein the air extraction and the air supplement are performed simultaneously. Optionally, the air suction amount of the exhaust fan is consistent with the air supplement amount of the air supplement control device. The air extraction amount can be about 10% of external circulating air.
That is to say, the oven is provided with an air supplement port, the outlet of the evaporator of the heat exchange pry block is provided with an air suction port, when the device runs, the exhaust fan continuously extracts about 10% of the external circulating air which can be discharged after deodorization, the temperature of the extracted external circulating air is about 55 ℃, and a small amount of external circulating air is extracted and discharged, so that the system can be in negative pressure running without odor leakage risk, and the redundant heat of the system can be discharged in a low-grade energy state, thereby improving the heat of the system
Efficiency. An air supplementing port is arranged in the drying oven, fresh low-temperature air (average temperature is 15 ℃) is introduced, the concentration of pollutants in the system is reduced, and partial cold energy is input into the system. Air suction and air supplement are carried out simultaneously, and the air suction quantity and the air supplement quantity are always kept consistent so as to maintain the balance of the air quantity of the whole system.
In some embodiments, the heat source driven device comprises a screw compressor 301, a shell and tube economizer 304, and an accumulator 305; the tube side of the shell-and-tube economizer is respectively connected with the first end of the liquid storage device and the first end of the evaporator; the shell side of the shell-and-tube economizer is connected with the second end of the evaporator and the suction end of the screw compressor respectively, the discharge end of the screw compressor is connected with the first end of the first condenser 102 (condenser A1), and the first end and the second end of the first subcooler 103 (subcooler A1) are connected with the second end of the first condenser and the second end of the liquid accumulator respectively. The bottom of the shell side of the shell-and-tube economizer is provided with an oil return port 308, and the oil return port returns the recovered lubricating oil into the screw compressor through an oil pump. By the oil return function, lubricating oil which is accumulated for a long time and enters the system can return to the compressor through the shell-and-tube energy saver, so that the hidden danger of oil shortage of the screw compressor is avoided. The second end of the evaporator is provided with a U-bend 209. By arranging the U-shaped bend, lubricating oil accumulated into the heat pump system for a long time can be accumulated in the U-shaped bend, the oil level exceeds a certain height, and the lubricating oil is carried into the shell-and-tube economizer along with the refrigerant. The heat source driving apparatus may further include a secondary oil separator 302, an oil cooler 303. Two ends of the secondary oil separator 302 are respectively connected with a discharge end and a suction end of the screw compressor, so that lubricating oil returns to the compressor; oil cooler 303 is connected to the screw compressor.
Optionally, the oven is sequentially provided with a head module 1, a preheating module 2, an air inlet module 3, a middle module 4 and a tail module 5; the air inlet module and the tail module are respectively provided with an external circulating air inlet 104 and an external circulating air return inlet 105; the first condenser is arranged in the intermediate module, and the first subcooler is arranged in the preheating module.
Through the structure, the gradient utilization of energy is realized, the adaptability of the preheating module to the energy quality is stronger, and the comprehensive utilization rate of the system energy is greatly improved by utilizing the high-temperature liquid refrigerant (95 ℃) with higher quality. And the subcooler is arranged in the oven, the heat of the subcooler is still provided for heating and evaporating the sludge, and meanwhile, the refrigerant is subcooled in the subcooler, so that on one hand, the energy efficiency of the heat pump is improved, and on the other hand, the heat for drying is increased.
In some embodiments, the plurality of heat pump systems includes a first heat pump system and a second heat pump system; the heat exchange pry block is also internally provided with a second condenser 208 (a condenser A2) and a second subcooler 207 (a subcooler A2); the discharge port of the screw compressor of the first heat pump system, the first condenser, the first subcooler and the liquid storage device of the first heat pump system are sequentially connected; the second condenser and the second subcooler are arranged in the heat exchange pry block, and the evaporator 205 of the second heat pump system, the evaporator 206 of the first heat pump system, the second subcooler 207 and the second condenser 208 are sequentially arranged along the wind direction of the external circulation wind preset in the heat exchange pry block.
In some embodiments, an expansion valve 210 is provided in the line between the tube-side outlet of the shell and tube economizer and the first end of the evaporator of the heat exchange skid.
The second subcooler realizes dry-wet separation at the heat exchange pry block, and the subcooler is arranged behind the evaporator, so that water drops carried by external circulating air after dehumidification can be removed by the subcooler, the water drops carried by the circulating air entering the condenser are avoided, and the corrosion risk of the condenser is eliminated; and the evaporator and the subcooler in the wet area are made of stainless steel materials, so that the corrosion resistance is high.
Briefly described is a specific medium temperature heat pump sludge drying device principle provided by the embodiment of the invention.
The embodiment of the invention relates to an air draft cold supplementing and re-cooling technology, the reason that a medium-temperature heat pump sludge drying device needs heat extraction is that the refrigerating capacity is insufficient, and cold supplementing can be realized by extracting the heat with the lowest grade at the outlet of an evaporator and then supplementing the fresh air with low temperature and low humidity, which is equivalent to increasing the refrigerating capacity of a system, and meanwhile, the heating capacity and the refrigerating capacity of the system are equal, and the heat of the system is balanced.
The air at the outlet of the evaporator is the lowest temperature of the system, namely the lowest-grade heat source, but the temperature is still 55 ℃ and is far higher than the temperature of the external environment, fresh air (average 15 ℃,70 percent RH) is supplemented into the drying oven by extracting the air temperature at the outlet of the evaporator, which is equivalent to increasing the refrigerating capacity of the system, and meanwhile, the heating capacity of the heat pump is completely used for the evaporation of the water in the sludge, so that the maximum utilization of the heating capacity is realized.
Based on the use of the air exhaust and cold supplement technology, the heat balance of the redundant heat of the medium-temperature heat pump sludge drying device can be realized through air exhaust and cold supplement in a fresh air supplement mode, which is equivalent to adding a refrigerant recooler in a heat pump sludge drying system, and the heat of the recooler is sent into the oven to evaporate the water of the sludge, thereby increasing the heating capacity of the heat pump, increasing the refrigerating capacity of the system and improving the energy efficiency of the system.
Example two
The embodiment of the invention provides a sludge drying method for a medium-temperature heat pump sludge drying device in any one of the embodiments, which is characterized by comprising the following steps of;
generating external circulation air in the external circulation structure through an external circulation fan;
the heat exchanger of the heat pump system exchanges heat with the external circulating air in the heat exchange prying block to obtain thermal state external circulating air
Guiding the thermal state external circulation air to the oven through the external circulation structure, and performing heat compensation on the thermal state external circulation air through a heat compensator of the heat pump system so as to dry sludge in the oven;
in the drying process, air is pumped from the outer circulation structure through an air suction opening, and air is supplied to the outer circulation structure through an air supply opening.
Of course, air extraction and air supplement can be simultaneously carried out in the drying process, and the air extraction amount and the air supplement amount are kept consistent.
As shown in fig. 5 and 6:
1-2: in the compression process of the screw compressor, the refrigerant is compressed from a low-temperature low-pressure gaseous refrigerant to a high-temperature high-pressure gaseous refrigerant, and the unit work of the compressor is h2-h1;
2-3: in the condensation process of the condenser, the exhaust gas of the compressor enters the condenser, and the compressor discharges heat and condenses into a saturated high-temperature high-pressure liquid refrigerant in the condenser;
3-4: the expansion valve performs a throttling process to change the refrigerant into a low-temperature low-pressure gas-liquid two-phase refrigerant;
4-1: in the evaporator evaporation process, the refrigerant from the expansion valve absorbs heat in the evaporator and evaporates into low-pressure gaseous refrigerant which returns to the screw compressor;
2-5: the conventional heat pump needs to discharge heat h2-h1 or h2-h5;
shaded portion a: heat provided to the system by a conventional heat pump;
3-3 'and 4' -4: the medium temperature heat pump system recools, the recooling quantity is h3-h3 'or h4-h 4', the recooling process provides both the heating quantity and the refrigerating quantity of the system;
1-1": increased refrigeration capacity through cold replenishment;
shaded portion B: the medium temperature heat pump provides heat to the system.
Therefore, based on the use of the air exhaust and cold supplement technology, the heat balance of the redundant heat of the medium-temperature heat pump sludge drying device can be realized through air exhaust and fresh air supplement, which is equivalent to adding a refrigerant recooler in the heat pump sludge drying system, and the heat of the recooler is sent into the oven to evaporate the water of the sludge, thereby increasing the heating capacity of the heat pump, simultaneously increasing the refrigerating capacity of the system and improving the energy efficiency of the system.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (1)
1. The medium-temperature heat pump sludge drying device is characterized by comprising: the heat pump system comprises a drying oven, a heat exchange prying block, an external circulation air fan and a plurality of heat pump systems; the drying oven, the heat exchange pry block and the external circulation air fan are communicated to form an external circulation structure, and external circulation air is generated in the external circulation structure through the external circulation air fan;
exchanging heat of the external circulating air in the heat exchange prying block through a heat exchanger of the heat pump system to obtain thermal state external circulating air;
guiding the thermal state external circulation air to the oven through the external circulation structure, and supplementing heat to the thermal state external circulation air through a heat compensator of the heat pump system so as to dry sludge in the oven;
each heat pump system comprises a heat source driving device, a heat compensator and a heat exchanger which are communicated with each other; the heat exchanger is arranged in the heat exchange pry block, and the heat compensator is arranged in the oven; the drying oven is provided with an air supplementing opening, fresh low-temperature air with the average temperature of 15 ℃ is introduced, the heat exchanger comprises an evaporator, and an air suction opening is arranged at an evaporator outlet of the heat exchange pry block;
the air suction opening is provided with an exhaust fan, and the exhaust fan is connected to the deodorization system;
the air supplementing opening is provided with an air supplementing control device, the exhaust fan is used for exhausting air from the heat exchange pry block through the air exhaust opening, and the air supplementing control device is used for supplementing air to the drying oven through the air supplementing opening; wherein air extraction and air supplement are carried out simultaneously;
the air suction quantity of the exhaust fan is consistent with the air supplement quantity of the air supplement control device;
the heat supplementing device comprises a first condenser and a first subcooler;
the heat source driving device comprises a screw compressor, a shell-and-tube economizer and a liquid storage device; the tube side of the shell-and-tube economizer is respectively connected with the first end of the liquid storage device and the first end of the evaporator; the shell side of the shell-and-tube economizer is respectively connected with the second end of the evaporator and the suction end of the screw compressor, the discharge end of the screw compressor is connected with the first end of the first condenser, and the first end and the second end of the first subcooler are respectively connected with the second end of the first condenser and the second end of the liquid accumulator;
the oven is sequentially provided with a head module, a preheating module, an air inlet module, a middle module and a tail module; the air inlet module and the tail module are respectively provided with an external circulating air inlet and an external circulating air return inlet; the first condenser is arranged in the intermediate module, and the first subcooler is arranged in the preheating module;
the plurality of heat pump systems includes a first heat pump system and a second heat pump system; a second condenser and a second subcooler are also arranged in the heat exchange pry block; the discharge port of the screw compressor of the first heat pump system, the second condenser, the second subcooler and the liquid storage device of the first heat pump system are sequentially connected; the second condenser and the second subcooler are arranged on the heat exchange pry block, and the evaporator of the second heat pump system, the evaporator of the first heat pump system, the second subcooler and the second condenser are sequentially arranged along the wind direction of external circulating wind preset in the heat exchange pry block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011328156.4A CN113371968B (en) | 2020-11-24 | 2020-11-24 | Medium-temperature heat pump sludge drying device and sludge drying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011328156.4A CN113371968B (en) | 2020-11-24 | 2020-11-24 | Medium-temperature heat pump sludge drying device and sludge drying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113371968A CN113371968A (en) | 2021-09-10 |
| CN113371968B true CN113371968B (en) | 2022-10-28 |
Family
ID=77569055
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011328156.4A Active CN113371968B (en) | 2020-11-24 | 2020-11-24 | Medium-temperature heat pump sludge drying device and sludge drying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113371968B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430901A (en) * | 2016-11-21 | 2017-02-22 | 武汉都市环保工程技术股份有限公司 | Moisture discharge and drying system for sludge |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575077B (en) * | 2013-11-07 | 2015-09-16 | 浙江大学 | A kind of Multi-layer belt type drying system |
| CN103864275B (en) * | 2014-04-03 | 2015-07-15 | 竺勇 | Bio-drying and dehumidifying coupled heat-pump flap tower type sludge drying process and system thereof |
| CN204417302U (en) * | 2015-01-06 | 2015-06-24 | 常州市新港热电有限公司 | Highly effective sludge drying machine |
| CN105174683B (en) * | 2015-10-22 | 2017-10-20 | 得利满水处理系统(北京)有限公司 | A kind of mud decrement composite processing system and method |
| KR102153987B1 (en) * | 2019-10-14 | 2020-09-21 | (주)화인테크워터 | Sludge reducing system |
| CN111018299A (en) * | 2019-11-18 | 2020-04-17 | 江苏天舒电器有限公司 | Negative pressure type heat pump closed sludge drying system |
-
2020
- 2020-11-24 CN CN202011328156.4A patent/CN113371968B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430901A (en) * | 2016-11-21 | 2017-02-22 | 武汉都市环保工程技术股份有限公司 | Moisture discharge and drying system for sludge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113371968A (en) | 2021-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6519967B1 (en) | Arrangement for cascade refrigeration system | |
| CN203848433U (en) | Heat pipe and heat pump dual-mode air conditioner with evaporative condenser | |
| CN107014015A (en) | Recovery type heat evaporating condensation type handpiece Water Chilling Units | |
| CN204494922U (en) | A kind of evaporative condenser flooded screw handpiece Water Chilling Units | |
| CN209782878U (en) | Heat pipe evaporation cooling type roof air conditioning unit | |
| CN103245135A (en) | Heat pump unit for recovering discharged heat of oil cooler of screw compressor by Freon evaporative oil cooler | |
| CN112325510A (en) | Circulating cooling water temperature-distribution device suitable for large-scale power plant | |
| CN208832629U (en) | A kind of low-temperature cold water unit | |
| CN101936614B (en) | Liquid-supplying and cold and hot water-circulating machine set of evaporative condensate pump | |
| CN1395072A (en) | Heat exchanger of high voltage generator for absorption type refrigerator | |
| CN206669949U (en) | Recovery type heat evaporating condensation type handpiece Water Chilling Units | |
| CN212299530U (en) | Refrigerating system with pressure control device | |
| CN113371968B (en) | Medium-temperature heat pump sludge drying device and sludge drying method | |
| KR20100046365A (en) | Heat pump system | |
| CN212619487U (en) | Refrigerating system supercooling degree device for improving wide temperature zone application | |
| KR20100005736U (en) | Heat pump system | |
| CN201757537U (en) | Liquid-feeding circulation cold/hot water unit of evaporative condensate pump | |
| CN202770079U (en) | Heat pump unit of freon evaporation oil cooler recovering exhaust heat of screw compressor oil cooler | |
| CN202195620U (en) | Low energy consumption refrigerating system | |
| KR200281265Y1 (en) | Multi Heat pump system | |
| CN111895689A (en) | Refrigerating system supercooling degree device for improving wide temperature zone application | |
| CN113371971B (en) | Heat pump sludge drying system and sludge drying equipment | |
| CN113371973B (en) | Sludge drying equipment | |
| JPH03160284A (en) | Extractor for absorbing refrigerator | |
| CN218120237U (en) | Heat exchange system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20220915 Address after: Room 407, 4th Floor, Building 4, No. 48, Zhongguancun South Street, Haidian District, Beijing 100081 Applicant after: BEIJING AQUAROOT ENVIRONMENT TECHNOLOGY CO.,LTD. Address before: No.2 workshop of Hunan Central Research Institute of Nonferrous Metals Co., Ltd., 339 Wangcheng Avenue, Wangcheng economic and Technological Development Zone, Changsha, Hunan 410000 Applicant before: Hunan Qingyuan Intelligent Manufacturing Equipment Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |