CN109928601A - Sludge deep drying method and system based on air heat pump - Google Patents
Sludge deep drying method and system based on air heat pump Download PDFInfo
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- CN109928601A CN109928601A CN201910245247.2A CN201910245247A CN109928601A CN 109928601 A CN109928601 A CN 109928601A CN 201910245247 A CN201910245247 A CN 201910245247A CN 109928601 A CN109928601 A CN 109928601A
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Abstract
The invention discloses sludge deep drying methods and system based on air heat pump.Excess sludge to be processed is added in sludge dusting desiccation apparatus; the pending mud of moisture content 30%~55% is set to be broken into 30~250 μm of partial size of sludge powder by dusting; dry air is then passed to mix with sludge powder under agitation; so that sludge powder is carried out desiccation and obtain sludge dry powder, while dry air becomes the low temperature entrainment of sludge dry powder containing humid air.Gas powder separation will be carried out by separator containing humid air entrainment of the low temperature of sludge dry powder, the solid matter separated is sludge dry powder material.Sludge dry powder material moisture content is 15%~25%.After low temperature after separation enters the condensation water removal of dehumidification by condensation device containing humid air, become low Cryogenic air；Low Cryogenic air is sent into air heat pump heating becomes dry air again, is reused.And the heat that cooling air absorbs returns air heat pump heat exchange to low Cryogenic air.The present invention has many advantages, such as sludge deep desiccation and directly uses ambient air as heat source, energy-efficient.
Description
Technical field
The present invention relates to sludge deep drying methods and system more particularly to a kind of excess sludge depth based on air heat pump
The method and process system for spending dehydration belong to the sewage treatment plant excess sludge processing subdomains of environmental technology field.
Background technique
With the development of Chinese society and urbanization, the yield of municipal sewage is constantly increasing, corresponding sewage treatment
The quantity of facility is consequently increased, and the yield of the by-product after sewage treatment --- excess sludge is also increasing.Cut-off
2017, China's excess sludge annual output was more than 40,000,000 tons, and harmless treatment rate is less than 10%.How place is dealt carefully with
It sets the sludge that these are continually generated, quantity is increasingly huge and has become urgent problem to be solved in terms of China environmental protection.
The excess sludge that most domestic sewage treatment plant generates, moisture content is generally 80% or more.Sludge dewatering is
Committed step in its treatment process.And sludge is difficult to the characteristics of deep dehydration, it has also become at limitation sewage sludge harmlessness, recycling
The bottleneck problem of reason.
Currently, the main technique of sludge dehydrating and drying has solar energy drying, heat drying, conditioning-filter-press dehydration etc..Wherein too
It is positive can drying process utilize the fuel factor of solar energy, moisture percentage in sewage sludge can be down to 10% hereinafter, achieve the purpose that depth desiccation,
But since it covers an area of, long processing period, is influenced by Changes in weather, it is more difficult to be widely applied.Heat drying technology is logical
Cross and directly heat or the mode of indirect heating is by moisture evaporative removal in sludge, moisture percentage in sewage sludge can be down to 40% hereinafter, and into
Energy consumption is substantially increased by one step needed for reducing moisture content then；Conditioning-filter-press dehydration technology is that excess sludge is modified by conditioner
Processing improves dewatering performance of sludge, and using filter press press dewatering, moisture percentage in sewage sludge can be down to 60%.Process above can
Moisture in fast eliminating sludge, but degree of dehydration is limited, it is more difficult to realize the depth desiccation (moisture content≤20%) of sludge.
Therefore, the moisture content for the semi-dry sludge that heat drying or mechanical dehydration technique generate is further decreased, rapidly and efficiently
The depth desiccation for realizing excess sludge, is current developing direction.
Summary of the invention
The present invention is intended to provide a kind of sludge deep drying method and system based on air heat pump, using air heat pump from
Heat is obtained in surrounding air not only to have formed dry air but also cooling air is made, and makes system whole more while dewatered sludge
It is energy-efficient.
The invention is realized by the following technical scheme:
Sludge deep drying method based on air heat pump, which comprises
Excess sludge to be processed is added in sludge dusting desiccation apparatus, pending mud is made to be broken into partial size by dusting
For 30~250 μm of sludge powder, then pass to dry air and mixed under agitation with sludge powder, make sludge powder into
Row desiccation obtains sludge dry powder, while dry air becomes the low temperature entrainment of sludge dry powder containing humid air；
Gas solid separation, the solid separated will be carried out by separator containing humid air entrainment of the low temperature of sludge dry powder
Substance is sludge dry powder material；After low temperature after separation enters the condensation water removal of dehumidification by condensation device containing humid air, become low temperature sky
Gas；The low Cryogenic air is sent into air heat pump and is heated as dry air, and dry air is sent into sludge dusting desiccation
Device is mixed with sludge powder under agitation, and sludge powder is made to carry out desiccation.
The method also includes:
Fresh air is sent into air heat pump and low Cryogenic air exchanges heat, fresh air cooling is made to become the same of cooling air
When so that the heating of low Cryogenic air is become dry air；Dry air feeding sludge dusting desiccation apparatus does sludge powder
It is dry, realize the recycling of dry air.
The method also includes:
Cooling air is sent into the dehumidification by condensation device and the low temperature wall-type heat exchange containing humid air, makes low temperature containing wet sky
Become low Cryogenic air after the solidifying water removal of air cooling, while becoming warm air after cooling air heating；Warm air is sent into air
Heat pump heats up as heat source for the heat exchange of low Cryogenic air, while warm air cooling becomes cooling air again and returns to the condensation
Dehumidifier is reused.
In above-mentioned technical proposal, the moisture content of the excess sludge is 35%~50%；The moisture content of the sludge dry powder
It is 15%~25%.
Sludge deep anhydration system based on air heat pump, including sludge dusting desiccation apparatus, separator, dehumidification by condensation
Device and air heat pump；The sludge dusting desiccation apparatus includes the dusting room and desiccation room of connection, and the dusting room is equipped with charging
Device；The separator is connected with the sludge dusting desiccation apparatus and dehumidification by condensation device respectively；Institute's air states heat pump difference
It is connected with the dehumidification by condensation device and the sludge dusting desiccation apparatus.
In above-mentioned technical proposal, auger is provided in the dusting room and desiccation room of the sludge dusting desiccation apparatus
Device；The desiccation room is equipped with air inlet and is connected with the air heat pump.
The present invention has the following advantages and beneficial effects: desiccation effect improve, by the economic moisture content of sludge drying by
40% is substantially reduced to 20% or less；By air source heat pump, using the air in environment as heat source, compared to heat drying technology,
It is more energy-efficient.
Detailed description of the invention
Fig. 1 is the sludge deep anhydration system schematic diagram according to the present invention based on air heat pump.
In figure: 1-sludge dusting desiccation apparatus；2-separators；3-dehumidification by condensation devices；4-air heat pumps.
Specific embodiment
A specific embodiment of the invention and the course of work are further described with reference to the accompanying drawing.
The positional terms such as the upper, lower, left, right, front and rear in present specification be positional relationship based on the figure and
It establishes.Attached drawing is different, then corresponding positional relationship is also possible to change therewith, therefore cannot be interpreted as with this to protection model
The restriction enclosed.
As shown in Figure 1, the sludge deep anhydration system based on air heat pump, including sludge dusting desiccation apparatus 1, separation dress
Set 2, dehumidification by condensation device 3 and air heat pump 4.Sludge dusting desiccation apparatus 1 includes the dusting room and desiccation room of connection, and dusting room is set
There is feeding device.Spiral agitator is provided in the dusting room and desiccation room of sludge dusting desiccation apparatus 1.Desiccation room is equipped with
Air inlet is passed through dry air.Separator 2 is connected with sludge dusting desiccation apparatus 1 and dehumidification by condensation device 3 respectively.Air heat pump
4 are connected with dehumidification by condensation device 3 and sludge dusting desiccation apparatus 1 respectively.Air inlet is connected with air heat pump 4.
Sludge dusting desiccation apparatus 1 is added by feeding device in the excess sludge to be processed that moisture content is 35%~50%
In, so that pending mud is broken into 30~250 μm of partial size of sludge by spiral agitator dusting first in dusting room
Powder.Then dry air is passed through by air inlet, is stirred under the stirring intensity of spiral agitator 1500-3000r/min
8-20min is uniformly mixed dry air with sludge powder and sufficient air water exchange reaction occurs, does sludge powder
Change obtains sludge dry powder, and moisture content is reduced to 15%~25%.Dry air becomes the low temperature entrainment of sludge dry powder containing wet simultaneously
Air.One of embodiment be dry air be surrounding air heating after low temperature dry air, humidity be 20%~
40%, after 25 DEG C~50 DEG C of temperature, with excess sludge air water exchange reaction, become the low temperature of humidity 60%~90% containing wet sky
Gas.
Gas powder separation will be carried out by separator 2 containing humid air entrainment of the low temperature of sludge dry powder, what is separated consolidates
Body substance is sludge dry powder material.Separator 2 can select deduster.Low temperature after separation enters condensation containing humid air, together
When cooling air is sent into dehumidification by condensation device 3 and low temperature wall-type heat exchange containing humid air, after removing water low temperature containing wet air condensation
As low Cryogenic air, dehumidification by condensation device is discharged in condensed water.Low Cryogenic air feeding air heat pump 4 is heated as dry sky
Gas, and dry air feeding sludge dusting desiccation apparatus 1 is mixed with sludge powder under agitation, carry out sludge powder
Desiccation.I.e. air is formed between air heat pump 4, sludge dusting desiccation apparatus 1 and separator 2 and dehumidification by condensation device 3 and is followed
Ring uses.It is used as exhaust gas after usually circulation 10 times, is discharged after carrying out purified treatment, fills into fresh air from air heat pump 4 at this time.
On the one hand fresh air is used as the supplementary source of dry air, on the other hand as the supplementary source of cooling air.First
It is exchanged heat in air heat pump 4 as heat source and low Cryogenic air using fresh air, low Cryogenic air heating is made to become drying
While air, fresh air cooling becomes cooling air, and enters dehumidification by condensation device 3 and be used as cooling medium.Cooling air exists
Become warm air from low temperature containing absorption heat in humid air in dehumidification by condensation device 3 to which temperature increases, then warm air is sent
Enter air heat pump 4 as heat source.In the above-described embodiments, cooling air is 5 DEG C~15 DEG C, and temperature is raised to 8~18 DEG C after heat exchange.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (6)
1. the sludge deep drying method based on air heat pump, which is characterized in that the described method includes:
Excess sludge to be processed is added in sludge dusting desiccation apparatus, pending mud is made to be broken into partial size 30 by dusting
~250 μm of sludge powder then passes to dry air and mixes under agitation with sludge powder, does sludge powder
Change obtains sludge dry powder, while dry air becomes the low temperature entrainment of sludge dry powder containing humid air；
Gas solid separation, the solid matter separated will be carried out by separator containing humid air entrainment of the low temperature of sludge dry powder
As sludge dry powder material；After low temperature after separation enters the condensation water removal of dehumidification by condensation device containing humid air, become low Cryogenic air；It will
The low Cryogenic air is sent into air heat pump and is heated as dry air, and dry air feeding sludge dusting desiccation apparatus is existed
It is mixed under stirring condition with sludge powder, sludge powder is made to carry out desiccation.
2. the sludge deep drying method according to claim 1 based on air heat pump, which is characterized in that the method is also
Include:
Fresh air is sent into air heat pump and low Cryogenic air exchanges heat, makes fresh air cooling while becoming cooling air
Low Cryogenic air heating becomes dry air；Sludge powder is dried in dry air feeding sludge dusting desiccation apparatus,
Realize the recycling of dry air.
3. the sludge deep drying method according to claim 2 based on air heat pump, which is characterized in that the method is also
Include:
Cooling air is sent into the dehumidification by condensation device and the low temperature wall-type heat exchange containing humid air, keeps low temperature cold containing humid air
Become low Cryogenic air after solidifying water removal, while becoming warm air after cooling air heating；Warm air is sent into air heat pump
As heat source for the heat exchange heating of low Cryogenic air, while warm air cooling becomes cooling air again and returns to the dehumidification by condensation
Device is reused.
4. the sludge deep drying method according to claim 1 based on air heat pump, which is characterized in that described remaining dirty
The moisture content of mud is 35%~50%；The moisture content of the sludge dry powder is 15%~25%.
5. the sludge deep anhydration system based on air heat pump can be used in implementing such as the described in any item bases of Claims 1-4
In the sludge deep drying method of air heat pump, which is characterized in that the system comprises sludge dusting desiccation apparatus (1), separation
Device (2), dehumidification by condensation device (3) and air heat pump (4)；The sludge dusting desiccation apparatus (1) include connection dusting room and
Desiccation room, the dusting room are equipped with feeding device；The separator (2) respectively with the sludge dusting desiccation apparatus (1) and
Dehumidification by condensation device (3) is connected；The air heat pump (4) fills with the dehumidification by condensation device (3) and the sludge dusting desiccation respectively
(1) is set to be connected.
6. the sludge deep anhydration system according to claim 5 based on air heat pump, which is characterized in that the sludge powder
Change in the dusting room and desiccation room of desiccation apparatus (1) and is provided with spiral agitator；The desiccation room is equipped with air inlet and institute
Air heat pump (4) are stated to be connected.
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| CN201910245247.2A CN109928601A (en) | 2019-03-28 | 2019-03-28 | Sludge deep drying method and system based on air heat pump |
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| CN201910245247.2A CN109928601A (en) | 2019-03-28 | 2019-03-28 | Sludge deep drying method and system based on air heat pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940572A (en) * | 2022-05-05 | 2022-08-26 | 杭州真一环保科技有限公司 | Sludge deep drying method and system based on low-temperature heat source circulation |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679299A (en) * | 1992-08-31 | 1994-03-22 | Toa Kankyo Service Kk | Sludge draining and drying device |
| JP2005230740A (en) * | 2004-02-20 | 2005-09-02 | Nippon Kentetsu Co Ltd | Sludge drying system |
| CN101983942A (en) * | 2010-10-20 | 2011-03-09 | 中国华能集团清洁能源技术研究院有限公司 | Drying and quality improvement apparatus for slime and sludge and technology thereof |
| CN103880261A (en) * | 2014-03-18 | 2014-06-25 | 嘉兴绿方舟环保技术有限公司 | Circulating fluid bed air-drying system |
| CN205368095U (en) * | 2015-12-19 | 2016-07-06 | 大连大孤山污水处理有限公司 | Novel sludge drying handles device |
| CN205740707U (en) * | 2016-05-27 | 2016-11-30 | 北京有福环境科技有限公司 | A kind of system utilizing air source heat pump to carry out Treatment of Sludge |
| CN109022079A (en) * | 2018-08-31 | 2018-12-18 | 武汉天源环保股份有限公司 | The method for preparing shaped fuel using town sewage plant sludge and house refuse |
-
2019
- 2019-03-28 CN CN201910245247.2A patent/CN109928601A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679299A (en) * | 1992-08-31 | 1994-03-22 | Toa Kankyo Service Kk | Sludge draining and drying device |
| JP2005230740A (en) * | 2004-02-20 | 2005-09-02 | Nippon Kentetsu Co Ltd | Sludge drying system |
| CN101983942A (en) * | 2010-10-20 | 2011-03-09 | 中国华能集团清洁能源技术研究院有限公司 | Drying and quality improvement apparatus for slime and sludge and technology thereof |
| CN103880261A (en) * | 2014-03-18 | 2014-06-25 | 嘉兴绿方舟环保技术有限公司 | Circulating fluid bed air-drying system |
| CN205368095U (en) * | 2015-12-19 | 2016-07-06 | 大连大孤山污水处理有限公司 | Novel sludge drying handles device |
| CN205740707U (en) * | 2016-05-27 | 2016-11-30 | 北京有福环境科技有限公司 | A kind of system utilizing air source heat pump to carry out Treatment of Sludge |
| CN109022079A (en) * | 2018-08-31 | 2018-12-18 | 武汉天源环保股份有限公司 | The method for preparing shaped fuel using town sewage plant sludge and house refuse |
Non-Patent Citations (1)
| Title |
|---|
| 陈昆柏等: "《污泥处理与处置》", 31 July 2017, 河南科学技术出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114940572A (en) * | 2022-05-05 | 2022-08-26 | 杭州真一环保科技有限公司 | Sludge deep drying method and system based on low-temperature heat source circulation |
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