CN110002716A - A kind of sludge drying method for the Northwest - Google Patents
A kind of sludge drying method for the Northwest Download PDFInfo
- Publication number
- CN110002716A CN110002716A CN201910393767.8A CN201910393767A CN110002716A CN 110002716 A CN110002716 A CN 110002716A CN 201910393767 A CN201910393767 A CN 201910393767A CN 110002716 A CN110002716 A CN 110002716A
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- Prior art keywords
- sludge
- sand
- northwest
- drying method
- sludge drying
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- 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)
- Treatment Of Sludge (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention discloses a kind of sludge drying method for the Northwest, steel plate and sand are heated using solar energy, recycle the specific heat capacity of substance different, heat high-temperature steel plate to sand, sand temperature can reach 90 DEG C or more, sludge is attached on sand, evaporates moisture using sand temperature, sludge moisture content is made to be reduced to 40% or less.The present invention only needs a small amount of processing equipment, is handled, energy-saving consumption-reducing, and sludge drying method of the invention is simple and easy using the sludge drying that the sun can be carried out low cost, is conducive to operation.
Description
Technical field
The present invention relates to sludge treatment field more particularly to a kind of sludge drying methods suitable for northwest arid area.
Background technique
Sludge is the by-product of city domestic sewage treatment plant, and since sewage internal substance is complicated, mostly colloidal activity is thin
Born of the same parents' structure, is rich in moisture, and fresh sludge water content is up to 85% or more.Even if sewage treatment plant carries out thickening processing to it
Afterwards, the water content of sludge is still higher, is unfavorable for transport, landfill or burns, therefore needs further to carry out desiccation to sludge.
Sludge drying device is based on mechanical dehydration and hot water dehydration, and main equipment has: filter, centrifuge, filters pressing
Machine, dehydrating agent, dryer etc., and aforementioned device is with high costs, and treatment process energy consumption is huge.
For the Northwest, such as Xinjiang, Ningxia province underdeveloped, the density of population and city size are all smaller, institute
The sludge quantity of generation is relatively fewer, if investing to build perfect sewage disposal system, need to put into enormous capital, economic pressures are big；Separately
Outside, sewage quantity is not able to satisfy the daily operating of equipment, and the idleness of equipment is caused to waste；And the Northwest's electric energy lacks, electricity price
It is relatively high.Due to the restriction of economy and the energy, the sewage treatment of the Northwest there is a problem of universal.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of utilization northwest physical geography resource and substance specific heat capacity characteristic
Sludge drying method, achieve the purpose that energy conservation and reduce cost.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of sludge drying method for the Northwest, comprising the following steps:
S1: choosing the sand in the Northwest desert, and average grain diameter is between 0.3-2 mm, and amount containing soil is no more than 30%, and sand particle is big
It is preferred；
S2: sand is laid on the steel plate, exposure at least 1 hour or more under the sun；
S3: primary sludge is mixed in proportion with the sand after exposure, is stirred evenly with blender, sludge is made all to be attached to sand
Sublist face, whipping process should drain water vapour in time；
S4: outdoor layout evaporates belt feeder, and the belt of belt feeder is black rubber belt, and the sand of sludge will be adhered to after S3 step desiccation
Son, which is laid on black rubber belt, carries out thermal compensation；
S5: collecting stirring for the sludge after S4 step desiccation, using the frictional force that sand is mutual, being adhered to sand surface
Sludge friction is got off, to reach the separation of the sludge after desiccation and sand；
S6: utilizing shaking-sieving equipment, sewage sludge powder and sand separated, and collects sewage sludge powder.
The S3 step sludge additional amount is 0.8-0.85 times of sand specific surface area.
The evaporation belt speed of the S4 step is 15-20m/min, and the sand laying depth for adhering to sludge is 3-5cm.
Further, fan is equipped with around evaporation belt feeder in S4 step.
The wind direction of the fan is vertical with belt direction of travel.
Beneficial effects of the present invention:
The present invention heats steel plate and sand using solar energy, recycles the specific heat capacity of substance different, makes high-temperature steel plate to sand
It is heated, sand temperature can reach 90 DEG C or more, and sludge makes moisture evaporate the mesh for reaching sludge drying after being attached on sand
's.The present invention only needs a small amount of processing equipment, carries out the sludge drying processing of low cost, energy-saving consumption-reducing, and sludge of the invention
Desiccation method is simple and easy, is conducive to operation.
Detailed description of the invention
Fig. 1 is the sludge drying flow chart of the embodiment of the present invention.
Fig. 2 is the position view that the embodiment of the present invention evaporates belt feeder and fan.
Specific embodiment
In order to achieve the above object with effect, technical solution of the present invention is further understood, following spy enumerates preferable implementation
Example, and cooperate attached drawing, it is described in detail below:
Northwest China area, such as Xinjiang, Ningxia province underdeveloped, the density of population and city size are all smaller, produced
Sludge quantity it is relatively fewer.Sludge drying processing is carried out using advanced equipment and medicament if building large-scale wastewater treatment plant,
Enormous capital need to be put into, economic pressures are big；In addition, since these regional population's density and city size are smaller, the sludge of generation
Amount is not able to satisfy the daily operating of large scale equipment, and the idleness of equipment is caused to waste；And the Northwest's electric energy lacks, and electricity price is relatively
Height, the large scale equipment of highly energy-consuming do not utilize energy conservation and cost control.
But the distinguishing feature of the Northwest is that desert is more, and Sandy Soil Resources are abundant；And the Northwest's drought, sunshine
Strongly, the temperature of earth's surface sand may be up to 60-70 degrees Celsius under normal circumstances, and it is optimal natural that sand becomes absorption solar energy
Material.
The present invention utilizes the natural geographical features of the Northwest, using the sand temperature after solar exposure, in sludge
Moisture is evaporated, to achieve the purpose that sludge drying.
Embodiment:
As shown in Figure 1, the step of sludge drying method of the present invention are as follows:
S1: choosing the sand in the Northwest desert, and average grain diameter is between 0.3-2 mm, and amount containing soil is no more than 30%, and sand particle is big
It is preferred.
S2: sand is laid on the steel plate, the exposure under the sun, laying depth is 4-6 mm, due to the specific heat capacity of steel plate
It is smaller than sand, therefore the temperature for absorbing steel plate after identical heat is higher than sand temperature, and heat effect, while sand can be played to sand
Son itself, which also absorbs heat from solar radiation, to heat up, and after exposure 1 hour, sand temperature is up to 90 DEG C or more.
High temperature sand is absorbed from steel plate with high temperature resistant dust catcher, is stored in heat preservation storage bin in case subsequent desiccation program
In needed for.
After steel plate is sucked away sand, faster due to exposed heating, 90 DEG C or more can be risen in the short time, can be spread again
It is stored in if sand reheats, after collection in heat preservation storage bin.
S3: primary sludge is mixed in proportion with the sand after exposure, is stirred evenly with continuous mixer, keeps sludge complete
Portion is attached to sand surface, and in whipping process, since sand temperature is high, the moisture content for being attached to the sludge of sand surface can be because
Moisture is vaporized and is reduced, and whipping process should drain water vapour in time.
Since the specific surface area of sand is 20-80(partial size 0.3-2mm) cm2, the total amount of liquid that surface can adhere to is non-
Chang great, the temperature of sand itself can evaporate the moisture of its surface 50-70%, directly sludge be allowed to become solid with fluid, largely
Water transform lost at water vapour.For the density of sand about in 2-2.3T/m3, specific surface area can be 4000-16000
㎡/m3 calculates according to the sludge that 0.1 mm of thickness is adhered on its surface, can adhere to the sludge of 4-16m3 in total, so being used to do
Change the ultrahigh in efficiency of sludge.
Ratio is got according to 4-16 proportionality coefficient calculating calculated above herein, and the partial size institute for depending primarily on sand is right
The specific surface area answered, then its ratio is finally 1:X, indicates that 1m3 sand can be with desiccation if the specific surface area of gravel is X ㎡/m3
X m3 sludge, but in order to improve efficiency, the present embodiment mixed proportion suggestion is 0.8-0.85x, to improve desiccation effect.
S4: outdoor layout evaporates belt feeder, and the belt of belt feeder is black rubber belt, and black rubber belt exposure is in sunlight
Under, black endothermic temperature is higher, can be usually reached 50 DEG C or more.The sand for adhering to sludge after S3 step desiccation is laid on black
Thermal compensation is carried out on balata belt, belt speed is in 15-20m/min, laying depth 3-5cm.Furthermore in evaporation belt feeder week
Fan can be equipped with by enclosing, and reinforce cross-ventilation, accelerate moisture evaporation, further dewatered sludge.Fig. 2 is that the side of evaporation belt feeder is flat
Row one exhaust fan of arrangement, the installation site of arrow direction and location mark small fan, long rectangle mark evaporation belt feeder.By this
Step, sludge moisture content can drop to 40% hereinafter, meeting the requirement of sludge drying.
S5: collecting stirring for the sludge after S4 step desiccation, using the frictional force that sand is mutual, being adhered to sand table
The sludge friction in face is got off, to reach the separation of the sludge after desiccation and sand, this process still has residual temperature, moisture due to sand
It can also reduce a little.
S6: utilizing shaking-sieving equipment, and fine screen mesh separates sewage sludge powder and sand.Sand after screening can repeat
Using S2 step is carried out, sewage sludge powder can be used for burning since water content is lower, can be used for aerobic compost, it is particularly possible to
Improve the soil of the Northwest, supplements organic matter.
The present invention utilizes the natural geographical features of the Northwest, using the specific heat capacity of solar energy and substance difference, reduces
Using processing equipment, the sludge drying processing of low cost, energy-saving consumption-reducing are carried out, and sludge drying method of the invention is simply easy
Row is conducive to operation.
Claims (5)
1. a kind of sludge drying method for the Northwest, which comprises the following steps:
S1: choosing the sand in the Northwest desert, and for average grain diameter between 0.3-2 mm, amount containing soil is no more than 30%；
S2: sand is laid on the steel plate, exposure at least 1 hour or more under the sun；
S3: primary sludge is mixed in proportion with the sand after exposure, is stirred evenly with blender, sludge is made all to be attached to sand
Sublist face, whipping process should drain water vapour in time；
S4: outdoor layout evaporates belt feeder, and the belt of belt feeder is black rubber belt, and the sand of sludge will be adhered to after S3 step desiccation
Son, which is laid on black rubber belt, carries out thermal compensation；
S5: collecting stirring for the sludge after S4 step desiccation, using the frictional force that sand is mutual, being adhered to sand surface
Sludge friction is got off, to reach the separation of the sludge after desiccation and sand；
S6: utilizing shaking-sieving equipment, sewage sludge powder and sand separated, and collects sewage sludge powder.
2. a kind of sludge drying method for the Northwest as described in claim 1, which is characterized in that the S3 step sludge
Additional amount is 0.8-0.85 times of sand specific surface area.
3. a kind of sludge drying method for the Northwest as described in claim 1, which is characterized in that the skin of the S4 step
Band revolving speed is 15-20m/min, and the sand laying depth for adhering to sludge is 3-5cm.
4. a kind of sludge drying method for the Northwest as claimed in claim 1 or 3, which is characterized in that in S4 step
Fan is equipped with around evaporation belt feeder.
5. a kind of sludge drying method for the Northwest as claimed in claim 4, which is characterized in that the wind direction of the fan
It is vertical with belt direction of travel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910393767.8A CN110002716A (en) | 2019-05-13 | 2019-05-13 | A kind of sludge drying method for the Northwest |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910393767.8A CN110002716A (en) | 2019-05-13 | 2019-05-13 | A kind of sludge drying method for the Northwest |
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| Publication Number | Publication Date |
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| CN110002716A true CN110002716A (en) | 2019-07-12 |
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ID=67176774
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| CN201910393767.8A Pending CN110002716A (en) | 2019-05-13 | 2019-05-13 | A kind of sludge drying method for the Northwest |
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Citations (12)
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|---|---|---|---|---|
| JPH10235400A (en) * | 1997-02-25 | 1998-09-08 | Norin Suisansyo Nogyo Kogaku Kenkyusho | Sludge treatment and apparatus therefor |
| CN1839289A (en) * | 2003-08-21 | 2006-09-27 | 凯尔图·埃里克森 | Method and apparatus for dehumidification |
| CN101240976A (en) * | 2007-02-09 | 2008-08-13 | 王明根 | Solar energy, high-temperature double heat source heat pump sludge dry system |
| CN101376557A (en) * | 2008-09-28 | 2009-03-04 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Artificially intensified preanhydration method for sludge |
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| CN101805105A (en) * | 2010-04-08 | 2010-08-18 | 宜兴市展宏环保设备有限公司 | Sludge treatment method |
| CN203999309U (en) * | 2014-08-07 | 2014-12-10 | 洛阳佳一机电设备有限公司 | A kind of sludge turning is thrown drying installation |
| CN104529130A (en) * | 2014-12-31 | 2015-04-22 | 北京沃特林克环境工程有限公司 | Solar sludge drying device |
| CN105800904A (en) * | 2016-05-12 | 2016-07-27 | 江苏康泰环保股份有限公司 | Microwave infrared coupling low-temperature drying equipment for sludge |
| CN106810032A (en) * | 2015-11-30 | 2017-06-09 | 周子童 | A kind of municipal sludge drying processing method |
| CN207276464U (en) * | 2017-05-11 | 2018-04-27 | 深圳市深水生态环境技术有限公司 | A kind of expandable type solar energy sludge at low temperature desiccation apparatus |
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-
2019
- 2019-05-13 CN CN201910393767.8A patent/CN110002716A/en active Pending
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| CN101240976A (en) * | 2007-02-09 | 2008-08-13 | 王明根 | Solar energy, high-temperature double heat source heat pump sludge dry system |
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| CN101723565A (en) * | 2008-10-16 | 2010-06-09 | 凯特琳·陈晓英 | Organic slurry heat oxidation treatment technological method and system |
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| CN203999309U (en) * | 2014-08-07 | 2014-12-10 | 洛阳佳一机电设备有限公司 | A kind of sludge turning is thrown drying installation |
| CN104529130A (en) * | 2014-12-31 | 2015-04-22 | 北京沃特林克环境工程有限公司 | Solar sludge drying device |
| CN106810032A (en) * | 2015-11-30 | 2017-06-09 | 周子童 | A kind of municipal sludge drying processing method |
| CN105800904A (en) * | 2016-05-12 | 2016-07-27 | 江苏康泰环保股份有限公司 | Microwave infrared coupling low-temperature drying equipment for sludge |
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Application publication date: 20190712 |