CN107986595B - Method for collecting and treating odor of sludge concentration tank - Google Patents
Method for collecting and treating odor of sludge concentration tank Download PDFInfo
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- CN107986595B CN107986595B CN201711334069.8A CN201711334069A CN107986595B CN 107986595 B CN107986595 B CN 107986595B CN 201711334069 A CN201711334069 A CN 201711334069A CN 107986595 B CN107986595 B CN 107986595B
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/95—Specific microorganisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Hydrology & Water Resources (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Treating Waste Gases (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of sludge treatment, and relates to a sludge concentration tank odor collecting and treating method, wherein a high-strength sludge tank top plate is integrally cast on the top of a circular concentration tank, rotating equipment such as a motor, a speed reducer and the like are installed on a platform, then a transmission shaft is used for driving a large-scale mud scraper at the periphery of the sludge concentration tank to transmit, a negative pressure breather valve is arranged on the sludge concentration tank, external gas can be timely supplemented into the tank to ensure the air pressure balance inside the tank body when a draught fan draws odor in the tank, after the tank body is integrally sealed, the motor and the speed reducer are installed on the top of the tank, in order to ensure that reserved equipment holes are as small as possible, the mud scraper and an exhaust pipe inside the tank body are split and then enter the tank body through reserved holes, and finally the mud scraper and the exhaust pipe are assembled and molded and then installed, and after the equipment is installed, the reserved equipment holes are connected through flanges, The sealing strip, the sealing steel plate and the sealing bolt are used for sealing, so that the sealing reliability of the sludge concentration tank is ensured.
Description
Technical Field
The invention belongs to the technical field of sludge treatment, and relates to a method for collecting and treating odor of a sludge concentration tank.
Background
Today, where the popularization of energy saving technology is expected, there is a desire for a technology that is low in cost and fundamentally improved even in the field of sewage treatment. The sludge concentration is an important place as a sludge reduction technique, and has been carried out by gravity concentration since a long time ago. The gravity concentration method is a very good technology, is easy to maintain and manage, has low management cost, and well utilizes natural force to carry out gravity sedimentation on the sludge.
At present, a sludge concentration tank belongs to a more smelly area in a sewage treatment plant, the sludge concentration tank which is built at present is mostly open, and odor generated by the sludge concentration tank can not be effectively collected. With the increasing strictness of the environmental protection requirements, the effective collection and treatment of odor in the sludge concentration pool area are imperative.
Disclosure of Invention
In view of the above, the present invention provides a method for collecting and treating odor in a sludge concentration tank, which aims to solve the problem that the odor in the area of the sludge concentration tank is not effectively collected and treated.
In order to achieve the aim, the invention provides a method for collecting and treating odor of a sludge concentration tank, which comprises the following steps:
A. collecting sludge with the water content of more than 90% in a sludge concentration tank for vertical flow precipitation;
B. installing a high-strength sludge tank top plate on a sludge concentration tank, integrally pouring the sludge tank top plate and the sludge concentration tank through reinforced concrete, arranging an equipment installation opening in the middle of the sludge tank top plate, installing a motor and a speed reducer at the top of the sludge tank top plate, enabling a mud scraper and a steady flow cylinder to enter the concentration tank and then be assembled with a transmission shaft of the motor and the speed reducer, sealing the installation opening through a flange, a sealing strip, a sealing steel plate and a sealing bolt, and sealing a gap of the transmission shaft through a soft sealing material;
C. arranging a plurality of odor suction openings on a sludge concentration tank, inserting an air suction pipe into the odor suction openings, sealing a gap between the air suction pipe and a tank body of the sludge concentration tank by using a soft sealing material, arranging a negative pressure breather valve on the right side of the odor suction openings to ensure the pressure balance inside the tank body, and after the sludge concentration tank is sealed, starting an induced draft fan to suck odor in the sludge concentration tank into a deodorization device for treatment; the negative pressure breather valve supplies air to the interior of the tank body to prevent the induced draft fan from vacuumizing;
D. the deodorization device is sequentially provided with a spraying area and a filling area from top to bottom, odor enters the deodorization device from bottom to top, atomization spraying of the spraying area moistens the odor, the moistened odor enters the filling area for microbial degradation, the odor subjected to microbial degradation is discharged from the deodorization device, and meanwhile, waste liquid flows out of the bottom of the deodorization device and is collected;
E. and a sludge outlet is formed in the bottom of the sludge concentration tank, and the sludge conveying pump conveys the deposited sludge to a specified position through a sludge discharge pipe for compression and dehydration treatment.
And furthermore, an equipment installation mounting opening is further formed in the top plate of the high-strength sludge tank in the step B, equipment in the tank can conveniently enter and exit the sludge concentration tank, and the mounting opening can be sealed with the sludge concentration tank through a sealing steel plate and a sealing strip with high corrosion resistance.
And furthermore, in the step B, the mud scraper and the flow stabilizing cylinder are detached and then enter the sludge concentration tank through the mounting port, and are mounted with the transmission shafts of the motor and the speed reducer in an assembling and forming mode.
And further, the air exhaust pipe and the induced draft fan in the step C are both made of corrosion-resistant glass fiber reinforced plastics.
And furthermore, the deodorization device in the step C adopts a modular design and is formed by assembling a stainless steel frame and a glass fiber reinforced plastic plate.
And furthermore, the deodorization device in the step C is controlled by a PLC control system, and the control modes comprise manual, automatic and remote.
And furthermore, a plurality of spray pipes are arranged at the top of the deodorization device in the step D, and a plurality of spray heads are arranged on the spray pipes.
The invention has the beneficial effects that:
1. the odor collecting and treating method for the sludge concentration tank comprises the steps of integrally pouring a working platform (namely a sludge tank top plate) on the top of a circular concentration tank, mounting rotating equipment such as a motor, a speed reducer and the like on the working platform, and driving a large sludge scraper in the sludge concentration tank to drive by virtue of a transmission shaft. After the whole pool body is sealed, the motor and the speed reducer are installed on the top of the pool, in order to ensure that the reserved equipment hole is as small as possible, the mud scraper and the flow stabilizing cylinder in the pool body are detached and then enter the pool body through the installation opening, and finally the mud scraper and the flow stabilizing cylinder are assembled and molded and then installed. After the equipment is installed, the reserved equipment hole is sealed through the flange, the sealing strip, the sealing steel plate and the sealing bolt, and the sealing reliability of the equipment hole is guaranteed.
2. The sludge concentration tank in the prior art is open, odor overflows, and the environment is poor. Some manufacturers increase the sealing of the steel structure and the glass fiber reinforced plastic structure, and the sealing mode has poor corrosion resistance and loose sealing, so that the sealing effect of the sludge concentration tank is not ideal. According to the odor collecting and treating method for the sludge concentration tank, the top plate of the sludge tank and the sludge concentration tank are integrally cast through reinforced concrete, the process is simple, the sealing is reliable, then the smaller mounting opening and the odor suction opening are sealed, the sealing performance, the corrosion resistance and the reliability of the sludge concentration tank are greatly improved, and the current situation that odor overflows in the sludge concentration tank is improved.
3. According to the method for collecting and treating odor in the sludge concentration tank, odor in the tank body is pumped by the draught fan, the air pressure in the tank body is rapidly reduced, air is supplemented into the tank body through the negative pressure breather valve at the moment, the air pressure balance in the tank body is ensured, the air in the tank body can be timely pumped out by the draught fan, and the odor gas is prevented from being accumulated in the tank body; through the large amount of supplementary of fresh air, can dilute the concentration of foul gas, can be again with the very little combustible gas density control in the pond below the limit of deflagration, guarantee the operation safety of cell body.
4. According to the method for collecting and treating odor of the sludge concentration tank, the odor enters the deodorizing device from bottom to top, the atomizing spray of the spray area moistens the odor, the moistened odor enters the filler area for microbial degradation, the odor subjected to microbial degradation is discharged from the deodorizing device, and meanwhile, waste liquid flows out from the bottom of the deodorizing device for collection; the deodorizing device occupies a small area, and by spraying a small amount of nutrient substances (nitrogen, phosphorus, potassium and the like), the deodorizing device ensures that the microorganism has a high removal rate of high-concentration odor, the equipment maintenance and management are simple, the removal rate of hydrogen sulfide is high, and no secondary pollution is generated in the treatment process.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a schematic view showing the structure of an odor collecting device for a sludge thickener according to the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Reference numerals in the drawings of the specification include:
the device comprises a sludge concentration tank 11, a sludge tank top plate 12, a speed reducer 13, a flow stabilizing cylinder 14, a sealing steel plate 15, a sealing bolt 16, an odor suction opening 17, a sludge discharge pipe 18 and a negative pressure breather valve 19.
Example (b):
a method for collecting and treating odor of a sludge concentration tank comprises the following steps:
A. collecting sludge with the water content of more than 90% in a sludge concentration tank 11 for vertical flow precipitation;
B. installing a high-strength sludge tank top plate 12 on a sludge concentration tank 11, integrally pouring the sludge tank top plate 12 and the sludge concentration tank 11 through reinforced concrete, forming an equipment installation opening in the middle of the sludge tank top plate 12, installing a motor and a speed reducer 13 on the top of the sludge tank top plate 12, enabling a central transmission sludge scraper and a steady flow cylinder 14 to enter the interior of the concentration tank through the equipment installation opening to complete assembly, then connecting the sludge scraper inside the tank body with the speed reducer 13 on the top of the tank through a transmission shaft to complete installation, and sealing the installation opening through a flange, a sealing strip, a sealing steel plate 15 and a sealing bolt 16; the transmission shaft gap is sealed by a soft sealing material.
C. A plurality of odor suction openings 17 are formed in the sludge concentration tank 11, the suction pipes are inserted into the odor suction openings 17, gaps between the suction pipes and the tank body are sealed through soft sealing materials, and meanwhile, a negative pressure breather valve 19 is arranged on the right side of each odor suction opening to guarantee pressure balance inside the tank body. After the sludge concentration tank 11 is sealed, starting an induced draft fan, and sucking odor in the sludge concentration tank 11 into a deodorization device for treatment; the negative pressure breather valve 19 is responsible for supplying air to the interior of the tank body, and prevents the induced draft fan from vacuumizing.
D. The deodorization device adopts a modular design and is formed by assembling a stainless steel frame and a glass fiber reinforced plastic plate. Deodorizing device from the top down is in proper order for spraying district and filler district, during the foul smell from the bottom up gets into deodorizing device, the shower nozzle that sprays on the district shower sprays nutrients (nitrogen, phosphorus, potassium etc.) and moistens the foul smell, the foul smell after the moist gets into filler district and carries out microbial degradation, the foul smell after being little microbial degradation is discharged from deodorizing device, the waste liquid is collected from deodorizing device's bottom outflow simultaneously, in addition, deodorizing device adopts PLC control system to control, control mode is automatic.
E. A sludge outlet is formed in the bottom of a sludge thickening tank 11, the sludge outlet and a sludge discharge pipe 18 are sealed through a flange, a sealing strip, a sealing steel plate 15 and a sealing bolt 16, and a sludge delivery pump delivers deposited sludge to a specified position through the sludge discharge pipe 18 for compression and dehydration treatment. The whole deodorizing device is designed according to the primary standard of pollutant discharge Standard of municipal wastewater treatment plant (GB18918-2002), and the discharge concentration of the main pollutant, namely hydrogen sulfide, cannot exceed 0.03mg/m3According to the detection result, the intake concentration of the hydrogen sulfide is 11-12 mg/m3The concentration of the discharged gas is 0.01-0.15 mg/m3The removal rate of hydrogen sulfide is high. And no odor is smelled near the sludge concentration tank 11, and the air around the sludge concentration tank 11 is detected, the concentration of the hydrogen sulfide is almost 0, and the sealing effect of the sludge concentration tank 11 is very good.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (7)
1. A method for collecting and treating odor of a sludge concentration tank is characterized by comprising the following steps:
A. collecting sludge with the water content of more than 90% in a sludge concentration tank for vertical flow precipitation;
B. installing a high-strength sludge tank top plate on a sludge concentration tank, integrally pouring the sludge tank top plate and the sludge concentration tank through reinforced concrete, arranging an equipment installation opening in the middle of the sludge tank top plate, installing a motor and a speed reducer at the top of the sludge tank top plate, enabling a mud scraper and a steady flow cylinder to enter the concentration tank and then be assembled with a transmission shaft of the motor and the speed reducer, sealing the installation opening through a flange, a sealing strip, a sealing steel plate and a sealing bolt, and sealing a gap of the transmission shaft through a soft sealing material;
C. the method comprises the following steps of arranging a plurality of odor suction ports on a sludge concentration tank, inserting an air suction pipe into the odor suction ports, sealing a gap between the air suction pipe and a tank body of the sludge concentration tank through a soft sealing material, meanwhile, arranging a negative pressure breather valve on the right side of the odor suction port to ensure the pressure balance inside the tank body, opening an induced draft fan after the sludge concentration tank is sealed, sucking odor in the sludge concentration tank into a deodorization device for treatment, and supplementing air into the tank body through the negative pressure breather valve to prevent the induced draft fan from vacuumizing;
D. the deodorization device is sequentially provided with a spraying area and a filling area from top to bottom, odor enters the deodorization device from bottom to top, atomization spraying of the spraying area moistens the odor, the moistened odor enters the filling area for microbial degradation, the odor subjected to microbial degradation is discharged from the deodorization device, and meanwhile, waste liquid flows out of the bottom of the deodorization device and is collected;
E. and a sludge outlet is formed in the bottom of the sludge concentration tank, and the sludge conveying pump conveys the deposited sludge to a specified position through a sludge discharge pipe for compression and dehydration treatment.
2. The method for collecting and treating odor in a sludge thickener according to claim 1, wherein the mounting port in the step B is sealed with the sludge thickener by a sealing steel plate and a sealing strip having high corrosion resistance.
3. The method for collecting and treating odor in a sludge concentration tank according to claim 2, wherein in the step B, the sludge scraper and the flow stabilizing cylinder are detached and then enter the sludge concentration tank through the mounting port, and are mounted with the transmission shaft of the motor and the reducer in an assembling and forming manner.
4. The method for collecting and treating odor of a sludge concentration tank according to claim 3, wherein the air exhaust pipe and the induced draft fan in the step C are both made of corrosion-resistant glass fiber reinforced plastics.
5. The method for collecting and treating odor of a sludge concentration tank as claimed in claim 4, wherein the deodorizing device in the step C is modular and is assembled by a stainless steel frame and a glass fiber reinforced plastic plate.
6. The method for collecting and treating odor in a sludge concentration tank according to claim 5, wherein the deodorizing means in the step C is controlled by a PLC control system, and the control mode includes any one of manual operation, automatic operation and remote operation.
7. The method for collecting and treating odor in a sludge concentration tank as claimed in claim 6, wherein in the step D, a plurality of spray pipes are installed on the top of the deodorization device, and a plurality of spray heads are installed on the spray pipes.
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| CN201711334069.8A CN107986595B (en) | 2017-12-13 | 2017-12-13 | Method for collecting and treating odor of sludge concentration tank |
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| CN201711334069.8A CN107986595B (en) | 2017-12-13 | 2017-12-13 | Method for collecting and treating odor of sludge concentration tank |
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| CN107986595B true CN107986595B (en) | 2020-06-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109758889A (en) * | 2019-02-26 | 2019-05-17 | 山东兰陵美酒股份有限公司 | A kind of liquor industry workshop VOCs waste gas processing method |
| CN110670651B (en) * | 2019-09-29 | 2023-06-16 | 中交疏浚技术装备国家工程研究中心有限公司 | Sludge warehouse covers membrane and removes system under mud |
| CN110790461A (en) * | 2019-10-21 | 2020-02-14 | 上海市政工程设计研究总院（集团）有限公司 | Full-sealed anaerobic and anticorrosive sludge storage tank |
Citations (4)
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| CN201809213U (en) * | 2010-09-06 | 2011-04-27 | 顾建 | Follow-up covering device for sewage treatment tank |
| CN105664543A (en) * | 2014-11-20 | 2016-06-15 | 徐静 | Deodorizing mechanism of central-driven thickener |
| CN205948665U (en) * | 2016-08-18 | 2017-02-15 | 广州盈隆污水处理有限公司 | Printing and dyeing wastewater hydrolytic acidification handles biological deodorization equipment of workshop section |
| CN106862226A (en) * | 2017-04-05 | 2017-06-20 | 浙江索奥环境技术有限公司 | Sedimentation basin foul smell collection device with revolution mud scraper |
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- 2017-12-13 CN CN201711334069.8A patent/CN107986595B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201809213U (en) * | 2010-09-06 | 2011-04-27 | 顾建 | Follow-up covering device for sewage treatment tank |
| CN105664543A (en) * | 2014-11-20 | 2016-06-15 | 徐静 | Deodorizing mechanism of central-driven thickener |
| CN205948665U (en) * | 2016-08-18 | 2017-02-15 | 广州盈隆污水处理有限公司 | Printing and dyeing wastewater hydrolytic acidification handles biological deodorization equipment of workshop section |
| CN106862226A (en) * | 2017-04-05 | 2017-06-20 | 浙江索奥环境技术有限公司 | Sedimentation basin foul smell collection device with revolution mud scraper |
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