CN111056726A - Sludge low-temperature drying and dehumidifying system - Google Patents
Sludge low-temperature drying and dehumidifying system Download PDFInfo
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- CN111056726A CN111056726A CN201911254974.1A CN201911254974A CN111056726A CN 111056726 A CN111056726 A CN 111056726A CN 201911254974 A CN201911254974 A CN 201911254974A CN 111056726 A CN111056726 A CN 111056726A
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- sludge
- condenser
- evaporator
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- 239000010802 sludge Substances 0.000 title claims abstract description 56
- 238000001035 drying Methods 0.000 title claims abstract description 38
- 239000003507 refrigerant Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000004064 recycling Methods 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a low-temperature sludge drying and dehumidifying system which comprises a drying box, a sludge distribution crawler belt and a sludge discharge hole, wherein the drying box is provided with a sludge distribution crawler belt and a sludge discharge hole; the low-temperature heat pump system comprises an evaporator, a compressor, a condenser and a throttle valve, wherein an air inlet of the evaporator is communicated with an air outlet of the drying box, and the evaporator, the compressor, the condenser and the throttle valve form a low-temperature heating circulation loop through a refrigerant; a blower for delivering the dry hot air discharged from the condenser into the drying box; wherein, the sludge distribution track can discharge the dried sludge from the sludge discharge hole. The whole system is carried out under low temperature environment, can not only mummification mud fast, has avoided producing bad peculiar smell when mummification mud, green, and each equipment degree of automation is high in the system, can be safely and the moisture in the efficient absorption mud, makes things convenient for the recycling of the mud after the mummification, improves the utilization ratio of resource.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a low-temperature sludge drying and dehumidifying system.
Background
At present, a large amount of solid wastes are produced in the production and processing processes of electronic circuits, which account for more than half of the amount of wastes produced in the whole electronic industry, wherein the most important is the production of pollutants of PCB manufacturing enterprises. The method has the advantages that a source emission reduction and related energy-saving and consumption-reducing system is made for actively promoting enterprises, the environmental quality of the enterprises is improved, the production cost of the enterprises is reduced, the enterprises can correspondingly establish a sewage treatment plant, the sludge is used as an important byproduct of sewage treatment, the daily production is rapidly increased, if the treatment is improper, secondary pollution is caused to the environment, the sludge resource utilization is the most effective treatment mode at present, and the sludge with high water content is the maximum bottleneck of the resource utilization.
In the production of PCB enterprises, the enterprises usually adopt the electric heating drying mode to reduce the moisture content of the sludge, when facing a large amount of sludge, the moisture content of the sludge can be reduced to the corresponding standard only by using a large-power electric heater or even a plurality of electric heaters to work simultaneously, however, the treatment mode is high in energy consumption, and the sludge is easy to generate a large amount of odor at high temperature to pollute the environment. In addition, the electric heater is easy to have safety accidents such as dry burning, short circuit and fire under the work of high load.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the low-temperature sludge drying and dehumidifying system provided by the invention has high automation degree, can safely and efficiently absorb moisture in sludge, is convenient for recycling dried sludge, and improves the utilization rate of resources.
According to the embodiment of the invention, the sludge low-temperature drying and dehumidifying system comprises: the drying box is provided with a sludge distribution crawler belt and a sludge discharge hole; the low-temperature heat pump system comprises an evaporator, a compressor, a condenser and a throttle valve, wherein an air inlet of the evaporator is communicated with an air outlet of the drying box, an air outlet of the evaporator is communicated with an air inlet of the condenser, and the evaporator, the compressor, the condenser and the throttle valve sequentially form a low-temperature heating circulation loop through a refrigerant; a blower for delivering the dry hot air discharged from the condenser into the drying box; wherein, the sludge distribution track can discharge the dried sludge from the sludge discharge hole.
The method has the following beneficial effects:
this system is through setting up low temperature heat pump system, the fan carries the dry-hot air to the drying cabinet in, the dry-hot air absorbs and becomes humid air behind the moisture of wet mud that distributes on the track is distributed to the mud, humid air enters into and carries out the heat transfer in the evaporimeter, humid air is by reentrant condenser after the condensation dehydration, the air that has dehumidified is carried to the drying cabinet by the fan again after being heated into dry-hot air by the condenser and continues to wet sludge drying dehumidification, absorb the moisture in the mud through this kind of mode, reduce the moisture content of mud. The whole system is carried out under low temperature environment, can not only mummification mud fast, has avoided producing bad peculiar smell when mummification mud, green, and each equipment degree of automation is high in the system, can be safely and the moisture in the efficient absorption mud, makes things convenient for the recycling of the mud after the mummification, improves the utilization ratio of resource.
According to some embodiments of the invention, the evaporator and the condenser are both connected to a radiator.
According to some embodiments of the invention, the heat sink may dissipate heat from the evaporator and the condenser by air-cooling or water-cooling.
According to some embodiments of the invention, a pressure sensor, a temperature sensor and a humidity sensor are arranged in the drying oven.
According to some embodiments of the invention, the fan is a centrifugal fan.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow chart of an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated. Unless otherwise expressly limited, terms such as set, mounted, connected and the like are to be construed broadly, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the detailed contents of the technical solutions.
Referring to fig. 1, the invention discloses a sludge low-temperature drying and dehumidifying system, comprising: the drying box 1 is provided with a sludge distribution crawler belt and a sludge discharge hole; the low-temperature heat pump system comprises an evaporator 2, a compressor 3, a condenser 4 and a throttle valve 5, wherein an air inlet of the evaporator 2 is communicated with an air outlet of the drying box 1, an air outlet of the evaporator 2 is communicated with an air inlet of the condenser 4, and the evaporator 2, the compressor 3, the condenser 4 and the throttle valve 5 sequentially form a low-temperature heating circulation loop through a refrigerant; a blower 7 for feeding the dry hot air discharged from the condenser 4 into the drying box 1; wherein, the sludge distribution track can discharge the dried sludge from the sludge discharge hole.
In the invention, it is understood that the sludge on the sludge distribution track is loose wet sludge and has strong air permeability before being dried and dehumidified. The dry air flow can pass through the sludge gap, so that the drying capacity of the dry air is improved, and the drying rate of wet sludge is increased.
This system is through setting up low temperature heat pump system, fan 7 carries the dry-hot air to the drying cabinet 1 in, the dry-hot air absorbs and becomes humid air behind the moisture of wet mud that distributes on the mud distribution track, humid air carries out the heat transfer in getting into evaporimeter 2, humid air is reentrant condenser 4 after the condensation dehydration, the air that has dehumidified is carried to drying cabinet 1 again by fan 7 and continues to wet sludge drying dehumidification after being heated into dry-hot air by condenser 4, absorb the moisture in the mud through this kind of mode, reduce the moisture content of mud. The whole system is carried out under low temperature environment, can not only mummification mud fast, has avoided producing bad peculiar smell when mummification mud, green, and each equipment degree of automation is high in the system, can be safely and the moisture in the efficient absorption mud, makes things convenient for the recycling of the mud after the mummification, improves the utilization ratio of resource.
Referring again to fig. 1, the overall system includes two circulation loops, a low-temperature heating circulation loop and an air circulation loop, and it can be understood that the two circulation loops are performed simultaneously, and the operation principle and process are as follows:
a low-temperature heating circulation loop: the liquid state of the low-temperature low-pressure liquid refrigerant in the pipeline of the evaporator 2 absorbing the heat of the humid air is changed into the low-temperature low-pressure gaseous refrigerant, the low-temperature low-pressure gaseous refrigerant flows into the compressor 3 again and is compressed into the high-temperature gaseous refrigerant, the high-temperature gaseous refrigerant enters the condenser 4 to exchange heat with the air to become the high-temperature liquid refrigerant, and the high-temperature liquid refrigerant enters the throttle valve 5 to be throttled and cooled into the low-temperature liquid refrigerant and then enters the evaporator 2 to perform the next low-temperature heating cycle.
An air circulation circuit: the fan 7 carries the dry hot air to the drying cabinet 1 through the pipeline, the moisture of the wet mud on the mud distribution track is absorbed and taken away to the dry hot air, become the humid air after the dry hot air absorbs the moisture, the humid air enters into 2 interior refrigerant with 2 pipelines of evaporimeter and carries out the heat transfer, the humid air is cooled into the dry cold air by the absorbed heat, the dry cold air flows into to the condenser 4 from 2 air outlets of evaporimeter, carry out the heat transfer with the high temperature liquid refrigerant in the 4 pipelines of condenser and become the dry hot air, the dry hot air is carried to the drying cabinet 1 in by the fan 7 again, carry out next air cycle. It is to be understood that in this embodiment, the fan 7 is a centrifugal fan.
After multiple drying cycles, the moisture content of wet sludge is reduced to the required requirement, dry sludge is discharged from a sludge discharge port through a sludge distribution crawler belt, and the dry sludge can be collected and recycled by burning heat recovery and other modes.
In the two circulation processes, a certain amount of condensed water is generated after the humid air enters the evaporator 2 and exchanges heat with the refrigerant in the pipeline of the evaporator 2, the condensed water is discharged from the drainage pipeline of the evaporator 2, and the condensed water can be collected and purified for recycling of industrial water.
Further, referring again to fig. 1, in some embodiments of the present invention, in order to be able to dissipate heat to the evaporator 2 and the condenser 4 in the low temperature heat pump system, both the evaporator 2 and the condenser 4 are connected to a heat sink 8. In this embodiment, the radiator 8 is respectively communicated with the evaporator 2 and the condenser 4 through a pipeline, and the radiator 8 can radiate heat to the evaporator 2 and the condenser 4 through air cooling or water cooling. It should be understood that, when the low temperature heat pump system is in operation, when the temperatures in the evaporator 2 and the condenser 4 are too high, the evaporator 2 and the condenser 4 can be cooled and radiated by the external air through the radiator 8, so that the operation efficiency of the whole low temperature heat pump system is improved, and meanwhile, the temperature of the refrigerant can be properly reduced, so that the hot dry air exhausted from the condenser 4 is prevented from being too high in temperature, and the hot dry air with too high temperature can generate certain peculiar smell after absorbing the sludge moisture and then is exhausted, thereby influencing the air quality in the system space.
In the present invention, a pressure sensor, a temperature sensor, and a humidity sensor are provided in the drying box 1. Each sensor can monitor environmental parameters in the system in real time, so that each part or device in the system can be conveniently adjusted, and the dryness of the sludge can reach the standard.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (5)
1. A sludge low-temperature drying and dehumidifying system is characterized by comprising:
the drying box is provided with a sludge distribution crawler belt and a sludge discharge hole;
the low-temperature heat pump system comprises an evaporator, a compressor, a condenser and a throttle valve, wherein an air inlet of the evaporator is communicated with an air outlet of the drying box, an air outlet of the evaporator is communicated with an air inlet of the condenser, and the evaporator, the compressor, the condenser and the throttle valve sequentially form a low-temperature heating circulation loop through a refrigerant;
a blower for delivering the dry hot air discharged from the condenser into the drying box;
wherein, the sludge distribution track can discharge the dried sludge from the sludge discharge hole.
2. The system of claim 1, wherein the evaporator and the condenser are both connected to a radiator.
3. The system of claim 2, wherein the heat sink can dissipate heat from the evaporator and the condenser by air cooling or water cooling.
4. The system for low-temperature drying and dehumidifying of sludge as claimed in claim 1, wherein a pressure sensor, a temperature sensor and a humidity sensor are arranged in the drying box.
5. The low-temperature sludge drying and dehumidifying system of claim 1, wherein the fan is a centrifugal fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911254974.1A CN111056726A (en) | 2019-12-10 | 2019-12-10 | Sludge low-temperature drying and dehumidifying system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911254974.1A CN111056726A (en) | 2019-12-10 | 2019-12-10 | Sludge low-temperature drying and dehumidifying system |
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| Publication Number | Publication Date |
|---|---|
| CN111056726A true CN111056726A (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911254974.1A Pending CN111056726A (en) | 2019-12-10 | 2019-12-10 | Sludge low-temperature drying and dehumidifying system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112707624A (en) * | 2020-12-08 | 2021-04-27 | 上海珂研智能科技有限公司 | Heat pump low temperature sludge drying system |
| CN113087357A (en) * | 2021-04-08 | 2021-07-09 | 浙江正基生态环境有限公司 | Low-temperature sludge drying treatment method |
| CN114812112A (en) * | 2022-04-27 | 2022-07-29 | 江苏博一环保科技有限公司 | Movable sludge heat pump drying room |
| CN115072961A (en) * | 2021-03-12 | 2022-09-20 | 同济大学 | Excrement and urine innocent treatment heat pump drying device |
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| CN205443031U (en) * | 2016-03-29 | 2016-08-10 | 上海晟徵实业有限公司 | Full heat recovery mud dehumidification mummification processing system |
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| CN209276347U (en) * | 2018-11-01 | 2019-08-20 | 深圳市大程节能设备有限公司 | A kind of sludge drying energy saver |
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2019
- 2019-12-10 CN CN201911254974.1A patent/CN111056726A/en active Pending
Patent Citations (6)
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| CN102557376A (en) * | 2010-12-18 | 2012-07-11 | 北京纬纶华业环保科技股份有限公司 | Sludge drying treatment method and device |
| CN205443031U (en) * | 2016-03-29 | 2016-08-10 | 上海晟徵实业有限公司 | Full heat recovery mud dehumidification mummification processing system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112707624A (en) * | 2020-12-08 | 2021-04-27 | 上海珂研智能科技有限公司 | Heat pump low temperature sludge drying system |
| CN115072961A (en) * | 2021-03-12 | 2022-09-20 | 同济大学 | Excrement and urine innocent treatment heat pump drying device |
| CN113087357A (en) * | 2021-04-08 | 2021-07-09 | 浙江正基生态环境有限公司 | Low-temperature sludge drying treatment method |
| CN114812112A (en) * | 2022-04-27 | 2022-07-29 | 江苏博一环保科技有限公司 | Movable sludge heat pump drying room |
| CN114812112B (en) * | 2022-04-27 | 2023-12-26 | 江苏博一环保科技有限公司 | Portable mud heat pump stoving room |
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