CN105693066A - Drying treatment method for municipal sludge - Google Patents
Drying treatment method for municipal sludge Download PDFInfo
- Publication number
- CN105693066A CN105693066A CN201610190545.2A CN201610190545A CN105693066A CN 105693066 A CN105693066 A CN 105693066A CN 201610190545 A CN201610190545 A CN 201610190545A CN 105693066 A CN105693066 A CN 105693066A
- Authority
- CN
- China
- Prior art keywords
- sludge
- equipment
- solar energy
- mud
- municipal sludge
- 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.)
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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
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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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention discloses a drying treatment method for municipal sludge. The drying treatment method comprises the following steps: carrying out mechanical dehydration on the municipal sludge in a dehydration machine until the moisture content of the dehydrated sludge is 80%, conveying the dehydrated sludge to a first quantitative feeder by virtue of a conveyer, carrying out quantitative feeding, and conveying the sludge to mixing equipment by virtue of a first belt conveyer; conveying sludge with the moisture content of 20% in a second sludge feeder to the mixing equipment by virtue of a second belt conveyor, and uniformly mixing dry and wet sludge; conveying the mixed sludge to solar drying equipment, wherein the solar drying equipment is connected with the second sludge feeder; and adding lime and acidy ferric aluminum sulfate into the solar drying equipment, granulating by virtue of granulation equipment, conveying a part of the sludge which is granulated by the granulation equipment and dried by the solar drying equipment to a fertilizer producing workshop for agricultural application, and returning the other part of the sludge back to the second sludge feeder. The drying treatment method has the characteristics of convenience in operation and low energy consumption and maintenance cost and is suitable for being popularized and used.
Description
Technical field
The invention belongs to field of environment engineering technology, relate to a kind of municipal sludge drying method for treating。
Background technology
Development along with wastewater treatment in China industry, the raising of sewage treatment capacity causes sharply increasing of sludge yield, sludge drying is a kind of Technology utilizing heat energy the moisture rapid evaporation in mud to be removed, Sludge Property after mummification improves, value improves, and creates condition for follow-up process。
Since 20 century 70 energy crises, solar energy as available new forms of energy, progressively becomes the emphasis of research both at home and abroad, and solar energy is inexhaustible with it, safe, without advantages such as transport, cleanliness without any pollution, is subject to people's attention。In recent years, the research entered applied by solar energy drying by people。
After adopting band machine or centrifuge that municipal sludge is carried out processed, the solid content of mud can only be promoted to 20%-25%DS, it is 30%DS to the maximum, still the moisture of 700-800kg is contained in dewatered sludge per ton, must improving solid content further, the equipment energy consumption used in sludge drying method of the prior art is high, maintenance cost is high, and complex operation, at present, it is badly in need of a kind of easy to operate, municipal sludge drying method for treating that less energy consumption, maintenance cost are low。
Summary of the invention
It is an object of the invention to the defect overcoming above-mentioned technology to exist, it is provided that a kind of easy to operate, municipal sludge drying method for treating that less energy consumption, maintenance cost are low。
Its concrete technical scheme is:
A kind of municipal sludge drying method for treating, comprising the following steps: municipal sludge first carries out mechanical dehydration in dewaterer, the moisture percentage in sewage sludge 80% after dehydration delivers to the first constant feeder through conveyer, carry out dosing, be transported to mixing apparatus with the first belt conveyor；20% water content sludge in second mud batcher is transported to mixing apparatus by the second belt conveyor, by dry and wet mud mix homogeneously；Enter solar energy desiccation equipment, solar energy desiccation equipment and the second mud batcher after mixing to connect；Solar energy desiccation equipment adds Calx and acid ferric aluminium sulfate, it is then passed through Granulation Equipments and carries out pelletize, it is agricultural that a mud part after solar energy desiccation is equipment dried is transported to composting workshop after Granulation Equipments, and a part returns in the second mud batcher。
Preferably, it is provided with agitating device, heat collector, heating installation, heat-pump dehumidification device, forces traffic ventilation unit, gas collector and odor removal in described solar energy desiccation equipment。
Preferably, in comminutor, the particle diameter of pelletize is 3mm。
Compared with prior art, beneficial effects of the present invention:
(1) fuel is saved: because the drying method of the present invention does not consume fossil fuel substantially；
(2) reduce the pollution to environment, adopt solar energy desiccation, while saving fossil fuel, ambient pressure can be alleviated again；
(3) operating cost is low: for initial cost, both mummification of solar energy and conventional energy resource are more or less the same, but when system is run, adopt its fuel of drying equipment of conventional energy resource costly, adopting solar energy drying, the initial investment of equipment is more or less the same, but solar energy desiccation is except consuming a small amount of electric energy, solar energy is not need expense, thus saving a large amount of expense；
(4) operating temperature of solar energy desiccation equipment belongs to middle low temperature, easy and simple to handle, safe and reliable。
Accompanying drawing explanation
Fig. 1 is the flow chart of municipal sludge drying method for treating of the present invention。
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical scheme is described in more detail。
With reference to Fig. 1, a kind of municipal sludge drying method for treating, comprise the following steps: municipal sludge first carries out mechanical dehydration in dewaterer, moisture percentage in sewage sludge 80% after dehydration, deliver to the first constant feeder through conveyer, carry out dosing, be transported to mixing apparatus with the first belt conveyor；20% water content sludge in second mud batcher is transported to mixing apparatus by the second belt conveyor, by dry and wet mud mix homogeneously；Mud is avoided to produce gluing characteristic in dry run, so as to do not produce to stick to harden when dry, dry not saturating phenomenon, also extend the fluctuation range of admissible wet mud water capacity simultaneously, enter solar energy desiccation equipment, solar energy desiccation equipment and the second mud batcher after mixing to connect；Solar energy desiccation equipment adds Calx and acid ferric aluminium sulfate。Calx and part free water generation exothermic reaction, mud temperature is caused to raise, thus cause that another part free water is evaporated, moisture content is reduced to about 20%, the acid iron sulfate aluminium powder added, raising rapidly of mud temperature is played a positive role, simultaneously, the Calx put into and acid ferric aluminium sulfate can adjust the pH value of mud, the rising of pH value and temperature serves and well suppresses and bactericidal action, ensure that the wholesomeness in processing procedure, reach stabilisation and innoxious purpose simultaneously。It is agricultural that a mud part after solar energy desiccation is equipment dried is transported to composting workshop after Granulation Equipments, and a part returns in the second mud batcher, carries out pelletize through Granulation Equipments, and in comminutor, the particle diameter of pelletize is 3mm。The advantage that mud after pelletize has close structure, settleability is good, degradation property is good, the mud after pelletize can improve soil as fertilizer, reaches resource and obtains purpose。
Agitating device, heat collector, heating installation, heat-pump dehumidification device, forces traffic ventilation unit, gas collector and odor removal it is provided with in described solar energy desiccation equipment。Temperature in solar energy desiccation equipment is generally kept in 40-50 DEG C；Ventilation rate is maintained at 80%-100%；In order to make full use of solar energy, light transmittance should be greater than 70。
Test proves that, the mud after using the municipal sludge drying method for treating of the present invention to process, its moisture content is lower than 10%, and solid content is promoted to more than 90%DS, and after pelletize, the volume of mud can reduce about 80%。Utilizing solar energy to carry out drying and other treatment, save electric energy, operating cost reduces about 90%。
Embodiment
The important technological parameters of Treatment of Sludge project is；Mud handling capacity: 35t/d, 1.19t/h
Mud just moisture content: W is just=80%
Mud moisture content at end: W is just=8%
Water evaporation quantity: 940kgH2O/h
Drying sludge institute calorific requirement: 2025600KJ/hv。By this project, the method for the present invention is used to keep thermal source supply stable and stable, it is possible to failure-free operation reaches 1000h, fully demonstrates, the stability of method described in technical solution of the present invention and seriality, advance practicalization。
The above; it is only the present invention preferably detailed description of the invention; protection scope of the present invention is not limited to this; any those familiar with the art is in the technical scope of present disclosure, and the simple change of the technical scheme that can become apparent to or equivalence are replaced and each fallen within protection scope of the present invention。
Claims (3)
1. a municipal sludge drying method for treating, it is characterised in that comprise the following steps: municipal sludge first carries out mechanical dehydration in dewaterer, moisture percentage in sewage sludge 80% after dehydration, deliver to the first constant feeder through conveyer, carry out dosing, be transported to mixing apparatus with the first belt conveyor；20% water content sludge in second mud batcher is transported to mixing apparatus by the second belt conveyor, by dry and wet mud mix homogeneously；Enter solar energy desiccation equipment, solar energy desiccation equipment and the second mud batcher after mixing to connect；Solar energy desiccation equipment adds Calx and acid ferric aluminium sulfate, it is then passed through Granulation Equipments and carries out pelletize, it is agricultural that a mud part after solar energy desiccation is equipment dried is transported to composting workshop after Granulation Equipments, and a part returns in the second mud batcher。
2. municipal sludge drying method for treating according to claim 1, it is characterised in that be provided with agitating device, heat collector, heating installation, heat-pump dehumidification device, forces traffic ventilation unit, gas collector and odor removal in described solar energy desiccation equipment。
3. municipal sludge drying method for treating according to claim 1, it is characterised in that the particle diameter of pelletize is 3mm in comminutor。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610190545.2A CN105693066A (en) | 2016-03-28 | 2016-03-28 | Drying treatment method for municipal sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610190545.2A CN105693066A (en) | 2016-03-28 | 2016-03-28 | Drying treatment method for municipal sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105693066A true CN105693066A (en) | 2016-06-22 |
Family
ID=56218036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610190545.2A Pending CN105693066A (en) | 2016-03-28 | 2016-03-28 | Drying treatment method for municipal sludge |
Country Status (1)
| Country | Link |
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| CN (1) | CN105693066A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759209A (en) * | 2018-07-11 | 2018-11-06 | 陈展伟 | The equipment of electromagnetic type refrigerant heat-exchange device, dehumidification device and application dehumidification device |
| CN114749098A (en) * | 2022-05-05 | 2022-07-15 | 江苏天煜通环保科技有限公司 | System and method for coupling granulation of gasified fine slag and sludge |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628780A (en) * | 2009-08-07 | 2010-01-20 | 镇江同盛环保设备工程有限公司 | Sludge drying system and sludge drying process |
| CN203048760U (en) * | 2013-02-01 | 2013-07-10 | 成都源创环保工程有限公司 | Device for stabilizing sludge with lime |
-
2016
- 2016-03-28 CN CN201610190545.2A patent/CN105693066A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628780A (en) * | 2009-08-07 | 2010-01-20 | 镇江同盛环保设备工程有限公司 | Sludge drying system and sludge drying process |
| CN203048760U (en) * | 2013-02-01 | 2013-07-10 | 成都源创环保工程有限公司 | Device for stabilizing sludge with lime |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759209A (en) * | 2018-07-11 | 2018-11-06 | 陈展伟 | The equipment of electromagnetic type refrigerant heat-exchange device, dehumidification device and application dehumidification device |
| CN114749098A (en) * | 2022-05-05 | 2022-07-15 | 江苏天煜通环保科技有限公司 | System and method for coupling granulation of gasified fine slag and sludge |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160622 |
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| WD01 | Invention patent application deemed withdrawn after publication |