CA2715773A1 - A dehyrogenation and drying method and installation for sludge conditioning at room temperature - Google Patents
A dehyrogenation and drying method and installation for sludge conditioning at room temperature Download PDFInfo
- Publication number
- CA2715773A1 CA2715773A1 CA2715773A CA2715773A CA2715773A1 CA 2715773 A1 CA2715773 A1 CA 2715773A1 CA 2715773 A CA2715773 A CA 2715773A CA 2715773 A CA2715773 A CA 2715773A CA 2715773 A1 CA2715773 A1 CA 2715773A1
- Authority
- CA
- Canada
- Prior art keywords
- sludge
- cndot
- annex
- dewatering
- installation
- 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.)
- Abandoned
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
Abstract
This invention is a technology in the sludge treatment field specializing in sludge dewatering equipment and installations. Sludge is produced as a waste product during wastewater treatment processes. The resulting sludge is high in organic content, and highly decomposable emitting foul odour. The sludge has low density and high moisture content. It is also a hydrophilic matter with a colloidal structure that poses challenges for dewatering. As sludge contains high nitrogen and phosphorous, if released into water body, it promotes eutrophication, resulting in low dissolved oxygen and deterioration of water quality. Sludge contains pathogen, parasites and other harmful substances which are transferrable to human within the biosphere causing health problems. This new technology provides effective treatment of sludge waste at relatively low energy consumption.
Description
A DEHYROGENATION AND DRYING METHOD AND INSTALLATION
FOR SLUDGE CONDITIONING AT ROOM TEMPERATURE
DESCRIPTION
This invention is a technology in the sludge treatment field specializing in sludge dewatering equipment and installations. Sludge is produced as a waste product during wastewater treatment processes. The resulting sludge is high in organic content, and highly decomposable emitting foul odour. The sludge has low density and high moisture content. It is also a hydrophilic matter with a colloidal structure that poses challenges for dewatering. As sludge contains high nitrogen and phosphorous , if released into water body, it promotes eutrophication, resulting in low dissolved oxygen and deterioration of water quality. Sludge contains pathogen, parasites and other harmful substances which are transferrable to human within the biosphere causing health problems. This new technology provides effective treatment of sludge waste at relatively low energy consumption.
TECHNICAL BACKGROUND
Wastewater treatment, an important part of environmental protection, produces increasingly large quantity of sludge that is difficult to be dewatered. The traditional centrifugal hydro-extractor, belt filter press, and frame filter press are only able to decrease water content of sludge to 75-85%, and hence are considered ineffective. Heating and drying are employed in most cases to further dewater the sludge, but potential problems of high energy consumption, offensive odour, and air pollution are also created.
Combining processes of sludge conditioning, mechanical dewatering, and cold air stripping, the invention provides a new means and equipment for dewatering of sludge at ambient temperature, reducing water content of sludge from 95-98% to 20-30% without additional source of heat such as burning of coal, oil, or gas. This is in compliance with the globally promoted concept of energy saving and carbon reduction, offering a solution to the problem of environmental pollution caused by sludge dewatering.
INTRODUCTION TO THE INVENTION
In order to solve the problem of lack of sludge dewatering equipment and the environmental impact caused by heating and drying of sludge to reduce its water content during dewatering process, the invention provides a means and an equipment for conditioning, dewatering, and drying of sludge at ambient temperature.
1. The conditioning device comprises an additive weighing unit, a feeding unit, a discharging unit, and a stirring unit.
FOR SLUDGE CONDITIONING AT ROOM TEMPERATURE
DESCRIPTION
This invention is a technology in the sludge treatment field specializing in sludge dewatering equipment and installations. Sludge is produced as a waste product during wastewater treatment processes. The resulting sludge is high in organic content, and highly decomposable emitting foul odour. The sludge has low density and high moisture content. It is also a hydrophilic matter with a colloidal structure that poses challenges for dewatering. As sludge contains high nitrogen and phosphorous , if released into water body, it promotes eutrophication, resulting in low dissolved oxygen and deterioration of water quality. Sludge contains pathogen, parasites and other harmful substances which are transferrable to human within the biosphere causing health problems. This new technology provides effective treatment of sludge waste at relatively low energy consumption.
TECHNICAL BACKGROUND
Wastewater treatment, an important part of environmental protection, produces increasingly large quantity of sludge that is difficult to be dewatered. The traditional centrifugal hydro-extractor, belt filter press, and frame filter press are only able to decrease water content of sludge to 75-85%, and hence are considered ineffective. Heating and drying are employed in most cases to further dewater the sludge, but potential problems of high energy consumption, offensive odour, and air pollution are also created.
Combining processes of sludge conditioning, mechanical dewatering, and cold air stripping, the invention provides a new means and equipment for dewatering of sludge at ambient temperature, reducing water content of sludge from 95-98% to 20-30% without additional source of heat such as burning of coal, oil, or gas. This is in compliance with the globally promoted concept of energy saving and carbon reduction, offering a solution to the problem of environmental pollution caused by sludge dewatering.
INTRODUCTION TO THE INVENTION
In order to solve the problem of lack of sludge dewatering equipment and the environmental impact caused by heating and drying of sludge to reduce its water content during dewatering process, the invention provides a means and an equipment for conditioning, dewatering, and drying of sludge at ambient temperature.
1. The conditioning device comprises an additive weighing unit, a feeding unit, a discharging unit, and a stirring unit.
2. The additive weighing unit includes a crew conveyor and a weighing pad.
3. A display unit showing quantity of feed and discharge, a feeding unit, a discharging unit, and a stirring unit are also available in the conditioning device.
4. The dewatering device is a plate press dewatering device.
The plates are equipped with certain number of springs and a feeding inlet at the center of each plate . The plates are mobile, and each filtering unit is of a composite structure.
Hydraulic unit is integrated with dewatering unit and controlling unit in the hydraulic cylinder. A cooling unit is installed in the cylinder. Cavities are available in the plates with sealing units at the sides of the plates. Water is discharged through an inverted-V-shape water container followed by troughs at two sides of the container. Flipping the water container by 180 degrees transforms it into a holder of filter cake.
The plates are equipped with certain number of springs and a feeding inlet at the center of each plate . The plates are mobile, and each filtering unit is of a composite structure.
Hydraulic unit is integrated with dewatering unit and controlling unit in the hydraulic cylinder. A cooling unit is installed in the cylinder. Cavities are available in the plates with sealing units at the sides of the plates. Water is discharged through an inverted-V-shape water container followed by troughs at two sides of the container. Flipping the water container by 180 degrees transforms it into a holder of filter cake.
5. The drying device is a mixing roller equipped with automatic tilting system inside. Cold air stripping unit is available below the roller, and dust collecting unit above.
THE SPECIFIC IMPLEMENTATION METHOD
= First, condition the slurry of 95-98% water content in slurry settling tank [2] by stirring.
= Weigh certain quantity of conditioner to combine with water in a predetermined ratio, and pump it into [2] to mix with the slurry. After conditioning for a preset time period (mixing time and speed depend on composition of slurry), pump it into plate press dewatering device [3].
= Each filtering plate of the plate press dewatering device is of a mobile and composite structure, made from high-pressure-resisting material, and is equipped with certain number of springs [4] which provide preloading and sealing [5] to avoid leaking of feed.
= Feeding is done at the center [6] of the filtering plates.
Cavities [7] with net lining are available at two sides of each of the filtering plates, increasing water output of filter chamber.
= When starting hydraulic cylinder to raise pressure, the filtering plates are pushed forward by piston-rods, and volume of the filter chamber is hence reduced. Filter cake is then dewatered under an evenly distributed pressure.
= A cooling unit [8] in the cylinder ensures undisturbed provision of pressure.
= Water is discharged through an inverted-V-shape water container followed by troughs at two sides of the container.
= Flipping the water container by 180 degrees automatic tilting system [9] transforms it into a holder of filter cake, which transports the cake into a drying unit below when the cake drops.
After stirring and stripping, the process of conditioning, dewatering, and drying of sludge is then completed, reducing water content from 95-98% to 30-40%.
c ADVANTAGES OF THE INVENTION
First condition the sludge according to its composition, add conditioner of accurate quantity, then pump the additive to conditioning device to mix with slurry, and stir. The advantage of the conditioning device is that it works with all kinds of sludge by adding conditioner according to the composition of the sludge, and completely mixing the sludge with the conditioner, creating favorable condition for the subsequent dewatering process. The conditioned sludge is pumped to dewatering device, producing filter cake with low water content, which can be further lowered through cold air stripping. The entire system is a continuous integrated production process. Because the process is completed at ambient temperature, cost is minimized, and the requirements of environmental protection, energy saving, and carbon reduction are also met.
~6
THE SPECIFIC IMPLEMENTATION METHOD
= First, condition the slurry of 95-98% water content in slurry settling tank [2] by stirring.
= Weigh certain quantity of conditioner to combine with water in a predetermined ratio, and pump it into [2] to mix with the slurry. After conditioning for a preset time period (mixing time and speed depend on composition of slurry), pump it into plate press dewatering device [3].
= Each filtering plate of the plate press dewatering device is of a mobile and composite structure, made from high-pressure-resisting material, and is equipped with certain number of springs [4] which provide preloading and sealing [5] to avoid leaking of feed.
= Feeding is done at the center [6] of the filtering plates.
Cavities [7] with net lining are available at two sides of each of the filtering plates, increasing water output of filter chamber.
= When starting hydraulic cylinder to raise pressure, the filtering plates are pushed forward by piston-rods, and volume of the filter chamber is hence reduced. Filter cake is then dewatered under an evenly distributed pressure.
= A cooling unit [8] in the cylinder ensures undisturbed provision of pressure.
= Water is discharged through an inverted-V-shape water container followed by troughs at two sides of the container.
= Flipping the water container by 180 degrees automatic tilting system [9] transforms it into a holder of filter cake, which transports the cake into a drying unit below when the cake drops.
After stirring and stripping, the process of conditioning, dewatering, and drying of sludge is then completed, reducing water content from 95-98% to 30-40%.
c ADVANTAGES OF THE INVENTION
First condition the sludge according to its composition, add conditioner of accurate quantity, then pump the additive to conditioning device to mix with slurry, and stir. The advantage of the conditioning device is that it works with all kinds of sludge by adding conditioner according to the composition of the sludge, and completely mixing the sludge with the conditioner, creating favorable condition for the subsequent dewatering process. The conditioned sludge is pumped to dewatering device, producing filter cake with low water content, which can be further lowered through cold air stripping. The entire system is a continuous integrated production process. Because the process is completed at ambient temperature, cost is minimized, and the requirements of environmental protection, energy saving, and carbon reduction are also met.
~6
Claims
.cndot. Annex 1- Process flow of installation and sludge dewatering process.
.cndot. Annex 2 - Installation of automatic weighing/conditioning unit of additives.
.cndot. Annex 3- plate press dewatering device.
.cndot. Annex 4- Position of pressure spring of filtering plate.
.cndot. Annex 5 - Position of enclosed part in filtering plate.
.cndot. Annex 6 - Feeding inlet is positioned at centre of each filtering plate.
.cndot. Annex 7- 2 concave sides of filtering plate.
.cndot. Annex 8- Cooling unit in hydraulic cylinder.
.cndot. Annex 9 - Automatic tilting system for collection of waste water and filter cake.
.cndot. Annex 10 - Drying and dust collecting units.
.cndot. Annex 2 - Installation of automatic weighing/conditioning unit of additives.
.cndot. Annex 3- plate press dewatering device.
.cndot. Annex 4- Position of pressure spring of filtering plate.
.cndot. Annex 5 - Position of enclosed part in filtering plate.
.cndot. Annex 6 - Feeding inlet is positioned at centre of each filtering plate.
.cndot. Annex 7- 2 concave sides of filtering plate.
.cndot. Annex 8- Cooling unit in hydraulic cylinder.
.cndot. Annex 9 - Automatic tilting system for collection of waste water and filter cake.
.cndot. Annex 10 - Drying and dust collecting units.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CHPCT/IB2010/001428 | 2010-06-11 | ||
| PCT/IB2010/001428 WO2011154760A1 (en) | 2010-06-11 | 2010-06-11 | A dehydrogenation and drying method and installation for sludge conditioning at room temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2715773A1 true CA2715773A1 (en) | 2011-12-11 |
Family
ID=45097578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2715773A Abandoned CA2715773A1 (en) | 2010-06-11 | 2010-09-20 | A dehyrogenation and drying method and installation for sludge conditioning at room temperature |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2715773A1 (en) |
| WO (1) | WO2011154760A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107892461A (en) * | 2017-11-09 | 2018-04-10 | 韩文雅 | A kind of cutting mechanism in mud dehydration plant |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103288327A (en) * | 2013-06-06 | 2013-09-11 | 江苏富大环境科技有限公司 | Sludge treatment method |
| CN105347651B (en) * | 2015-12-15 | 2018-09-04 | 南安市先创环保技术服务有限公司 | A kind of sludge dewatering conditioning device |
| CN108147643B (en) * | 2018-01-12 | 2020-11-27 | 洛阳浦惠环保科技有限公司 | Residual sludge deep treatment and regeneration utilization device |
| CN111892278A (en) * | 2020-08-12 | 2020-11-06 | 宁波市路棠电子科技有限公司 | Solidification treatment device capable of achieving quantitative sludge single-time ingestion and stirring |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6082192A (en) * | 1983-10-13 | 1985-05-10 | Ebara Infilco Co Ltd | Treatment of organic sludge |
| DE4116146A1 (en) * | 1990-10-18 | 1992-04-23 | Klein Alb Gmbh Co Kg | METHOD FOR DRAINING SUSPENSIONS OD. DGL. MUDDY MIXTURES |
| US5562832A (en) * | 1995-01-13 | 1996-10-08 | Beloit Technologies, Inc. | Absorptive sludge dewatering process for papermaking waste |
| US6846422B2 (en) * | 2002-04-17 | 2005-01-25 | K2M Mobile Treatment Services, Inc. | Sludge stripping process and system |
-
2010
- 2010-06-11 WO PCT/IB2010/001428 patent/WO2011154760A1/en active Application Filing
- 2010-09-20 CA CA2715773A patent/CA2715773A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107892461A (en) * | 2017-11-09 | 2018-04-10 | 韩文雅 | A kind of cutting mechanism in mud dehydration plant |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011154760A1 (en) | 2011-12-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |
Effective date: 20130920 |