CN114180797B - Drying treatment method for oily sludge - Google Patents
Drying treatment method for oily sludge Download PDFInfo
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- CN114180797B CN114180797B CN202111548450.0A CN202111548450A CN114180797B CN 114180797 B CN114180797 B CN 114180797B CN 202111548450 A CN202111548450 A CN 202111548450A CN 114180797 B CN114180797 B CN 114180797B
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- oily sludge
- sludge
- treatment method
- drying treatment
- evaporation tank
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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
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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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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
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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
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention provides a drying treatment method of oily sludge, and relates to the technical field of sludge treatment. The drying treatment method of the oily sludge comprises the following specific steps: s1, pumping the collected emulsion-like oily sludge into a tubular heat exchanger, and preheating the oily sludge by utilizing waste heat generated by factory production and processing; s2, introducing preheated oil-containing sludge into an evaporation tank, heating the oil-containing sludge in the evaporation tank by using the height Wen Waiyan generated by combustion of materials in a combustion chamber, filtering water vapor generated by evaporation in the evaporation tank, and directly discharging the filtered water vapor into the atmosphere; s3, stopping heating when the water content of the oily sludge in the evaporation tank is lower than 6%, and guiding the oily sludge in the evaporation tank into a mechanical stirring device. Through adopting the treatment mode of resource cyclic utilization, not only can carry out high-efficient desiccation to a large amount of oily sludge, also can carry out effectual waste utilization to a large amount of abandoned plant straw simultaneously, work efficiency improves greatly.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a drying treatment method of oil-containing sludge.
Background
Oily sludge is a mixture of crude oil or finished oil mixed with soil or other media, and the oil content in the oily sludge cannot be directly recovered to possibly cause pollution, and is one of main pollutants in petrochemical industry. Sludge generated by a sewage treatment system of petrochemical enterprises mainly comes from bottom sludge of an oil separation tank, floating slag of a flotation tank and residual activated sludge, and is collectively called as 'three-sludge'. The oil-containing sludge also comprises oil sludge polluted in steel smelting, oil sludge polluted by heavy oil in the operation process of a ship repair shipyard and the like; the oily sludge is a stable suspension emulsion system which is generally composed of oil-in-water (o/w), water-in-oil (w/o) and suspended solids, has poor dewatering effect, is influenced by factors such as the water quality of the polluted water, the treatment process, the adding agent and the like, has large difference, high treatment difficulty and large oil content difference, has recycling value partially, contains PAHs, heavy metals and other harmful substances, and has radioactive pollution to the environment.
The treatment of oily sludge is a great problem in the industry, and the mechanical dehydration effect is poor due to the fact that the oily sludge is mostly in a suspension emulsion, and a great amount of energy is consumed by adopting an evaporation type treatment mode, so that the method is environment-friendly, and meanwhile, the treatment cost of the sludge is greatly increased.
Therefore, a novel drying treatment method for the oil-containing sludge is developed.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a drying treatment method of oil-containing sludge, which solves the problems that the mechanical dehydration effect is poor because the oil sludge is mostly in a suspension emulsion, a large amount of energy is consumed by adopting an evaporation type treatment mode, the environment is not protected, and the treatment cost of the sludge is greatly increased.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the drying treatment method of the oily sludge comprises the following specific steps:
s1, pumping the collected emulsion-like oily sludge into a tubular heat exchanger, and preheating the oily sludge by utilizing waste heat generated by factory production and processing;
s2, introducing preheated oil-containing sludge into an evaporation tank, heating the oil-containing sludge in the evaporation tank by using the height Wen Waiyan generated by combustion of materials in a combustion chamber, filtering water vapor generated by evaporation in the evaporation tank, and directly discharging the filtered water vapor into the atmosphere;
s3, stopping heating when the water content of the oily sludge in the evaporation tank is lower than 6%, guiding the oily sludge in the evaporation tank into a mechanical stirring device, starting the stirring device to stir and scatter the oily sludge, pouring crushed plant straws into the stirring device when the temperature of the oily sludge is cooled to 80-100 ℃, and mixing and stirring for 10-15min;
s4, pouring the fully mixed mixture out of the stirring device, dispersing and guiding the mixture into the heating chamber in the S2, enabling the plant straws in the mixture to be combined with combustible substances in the oily sludge for high-temperature combustion, and heating the evaporating pot in the next round of treatment;
s5, collecting carbon black of high-temperature gas generated after the mixture is combusted, then introducing the high-temperature gas into the tubular heat exchanger in the S1, and preheating oily sludge in subsequent treatment by using the high-temperature gas;
s6, filtering the gas subjected to heat exchange by using an active carbon filter device, and filtering out various harmful substances in the gas by using active carbon;
s7, regularly collecting the thoroughly dried filter residues after the full combustion in the S4, and then carrying out subsequent treatment according to actual needs.
Preferably, when the emulsion-like oily sludge collected in the step S1 is more viscous, a proper amount of water is added for dilution before the emulsion-like oily sludge is pumped to the tubular heat exchanger, and mixed and stirred, and the viscous oily sludge can be effectively prevented from blocking the tubular heat exchanger by diluting the oily sludge, and meanwhile, the working load and the pressure of the liquid pump can be reduced, and the service life of the liquid pump can be prolonged.
Preferably, the temperature in the evaporation tank in the step S2 is controlled at 150-180 ℃, so that the rapid evaporation of water in the oil-containing sludge can be realized, and meanwhile, the combustion of part of combustible substances in the oil-containing sludge caused by the excessive temperature can be prevented.
Preferably, the plant straw in S3 is corn straw, straw or wheat straw, and the corn straw, straw or wheat straw in the waste gas in the farmland is both waste and combustible, and by mixing the waste with the dried oily sludge, the waste is combusted, and meanwhile, part of combustible substances in the oily sludge can be combusted, so that the drying degree of the oily sludge is further improved.
Preferably, the ratio between the plant straw and the oil-containing sludge in the step S3 is 1:1, so that the mixture can be fully combusted, and flameout caused by low content of combustible matters such as the plant straw is avoided.
Preferably, when the mixture is burned in the step S4, a proper amount of plant straw is added into the combustion chamber, so that the temperature in the combustion chamber can be further increased, and the drying degree of the oil-containing sludge can be improved.
(III) beneficial effects
The invention provides a drying treatment method of oil-containing sludge. The beneficial effects are as follows:
1. according to the drying treatment method for the oily sludge, a treatment mode of resource recycling is adopted, so that a large amount of oily sludge can be subjected to efficient drying treatment, and meanwhile, a large amount of waste plant straws can be effectively utilized, so that the working efficiency is greatly improved.
2. According to the drying treatment method of the oily sludge, the treatment modes of preheating, evaporating, mixing and burning are adopted, so that the induction treatment of a large quantity of oily sludge can be finished, a large amount of energy sources can be saved, the environment is protected, and the treatment cost of the oily sludge is reduced.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
the embodiment of the invention provides a drying treatment method of oil-containing sludge, which comprises the following specific steps:
s101, pumping the collected emulsion-like oily sludge into a tubular heat exchanger (when the emulsion-like oily sludge is more viscous, adding a proper amount of water to dilute the emulsion-like oily sludge before pumping the emulsion-like oily sludge into the tubular heat exchanger, and mixing and stirring the emulsion-like oily sludge, and preheating the oily sludge by utilizing waste heat generated by factory production and processing;
s102, introducing preheated oil-containing sludge into an evaporation tank, heating the oil-containing sludge in the evaporation tank by using the height Wen Waiyan generated by combustion of materials in a combustion chamber (the temperature in the evaporation tank is controlled at 150-180 ℃), filtering water vapor generated by evaporation in the evaporation tank, and directly discharging the filtered water vapor into the atmosphere;
s103, stopping heating when the water content of the oily sludge in the evaporation tank is lower than 6%, guiding the oily sludge in the evaporation tank into a mechanical stirring device, starting the stirring device, stirring and scattering the oily sludge, pouring crushed plant straws (corn straws, straw straws or wheat straws are adopted as the plant straws, and the ratio between the plant straws and the oily sludge is 1:1) into the stirring device when the temperature of the oily sludge is cooled to 80-100 ℃, and mixing and stirring for 10-15min;
s104, pouring the fully mixed mixture out of the stirring device, dispersing and guiding the mixture into the heating chamber in the S102, enabling the plant straws in the mixture to be combined with combustible substances in the oily sludge to burn at high temperature (adding a proper amount of uncut plant straws into the combustion chamber during burning), and heating the evaporating pot in the next round of treatment;
s105, collecting carbon black of high-temperature gas generated after the mixture is combusted, then introducing the high-temperature gas into a tubular heat exchanger in S101, and preheating oily sludge in subsequent treatment by using the high-temperature gas;
s106, filtering the gas subjected to heat exchange by using an active carbon filter device, and filtering out various harmful substances in the gas by using active carbon;
s107, periodically collecting the thoroughly dried filter residues after full combustion in the S104, and then carrying out subsequent treatment according to actual needs.
Embodiment two:
in this embodiment, based on the first embodiment, the drying treatment steps are as follows:
s201, filtering the collected emulsion-like oily sludge by using a filter screen to remove larger clods and other impurities in the oily sludge, and pumping the filtered liquid oily sludge into a tubular heat exchanger to preheat the oily sludge by using waste heat generated by factory production and processing;
s202, introducing preheated oil-containing sludge into an evaporation tank, heating the oil-containing sludge in the evaporation tank by using the height Wen Waiyan generated by combustion of materials in a combustion chamber, controlling the temperature in the evaporation tank to be 150-180 ℃, filtering water vapor generated by evaporation in the evaporation tank, and directly discharging the filtered water vapor into the atmosphere;
s203, stopping heating when the water content of the oily sludge in the evaporation tank is lower than 4%, introducing the oily sludge in the evaporation tank and larger sludge blocks filtered in the earlier stage into a mechanical stirring device, starting the stirring device, stirring and crushing the oily sludge, pouring crushed and compressed plant straws into the stirring device when the temperature of the oily sludge is cooled to 80-100 ℃, wherein the ratio between the plant straws and the oily sludge is 1:1, and mixing and stirring for 8-10min;
s204, pouring the fully mixed mixture out of the stirring device, dispersing and guiding the mixture into the heating chamber in the S202, enabling plant straws in the mixture to be combined with combustible substances in the oily sludge for high-temperature combustion, and heating the evaporating pot in the next round of treatment;
s205, collecting carbon black of high-temperature gas generated after the mixture is combusted, then introducing the high-temperature gas into a tubular heat exchanger in S201, and preheating oily sludge in subsequent treatment by using the high-temperature gas;
s206, filtering the gas subjected to heat exchange by using an active carbon filter device, and filtering out various harmful substances in the gas by using active carbon;
s207, periodically collecting the thoroughly dried filter residues after full combustion in the S204, and then carrying out subsequent treatment according to actual needs.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The drying treatment method of the oily sludge is characterized by comprising the following specific steps of:
s1, pumping the collected emulsion-like oily sludge into a tubular heat exchanger, and preheating the oily sludge by utilizing waste heat generated by factory production and processing;
s2, introducing preheated oil-containing sludge into an evaporation tank, heating the oil-containing sludge in the evaporation tank by using the height Wen Waiyan generated by combustion of materials in a combustion chamber, filtering water vapor generated by evaporation in the evaporation tank, and directly discharging the filtered water vapor into the atmosphere;
s3, stopping heating when the water content of the oily sludge in the evaporation tank is lower than 6%, guiding the oily sludge in the evaporation tank into a mechanical stirring device, starting the stirring device to stir and scatter the oily sludge, pouring crushed plant straws into the stirring device when the temperature of the oily sludge is cooled to 80-100 ℃, and mixing and stirring for 10-15min;
s4, pouring the fully mixed mixture out of the stirring device, dispersing and guiding the mixture into the heating chamber in the S2, enabling the plant straws in the mixture to be combined with combustible substances in the oily sludge for high-temperature combustion, and heating the evaporating pot in the next round of treatment;
s5, collecting carbon black of high-temperature gas generated after the mixture is combusted, then introducing the high-temperature gas into the tubular heat exchanger in the S1, and preheating oily sludge in subsequent treatment by using the high-temperature gas;
s6, filtering the gas subjected to heat exchange by using an active carbon filter device, and filtering out various harmful substances in the gas by using active carbon;
s7, regularly collecting the thoroughly dried filter residues after the full combustion in the S4, and then carrying out subsequent treatment according to actual needs.
2. The drying treatment method of the oily sludge according to claim 1, wherein the drying treatment method is characterized by comprising the following steps: when the emulsion-like oily sludge collected in the step S1 is more viscous, a proper amount of water is added for dilution before the emulsion-like oily sludge is pumped to the tubular heat exchanger, and mixing and stirring are carried out.
3. The drying treatment method of the oily sludge according to claim 1, wherein the drying treatment method is characterized by comprising the following steps: and (2) controlling the temperature in the evaporating pot in the step (S2) to be 150-180 ℃.
4. The drying treatment method of the oily sludge according to claim 1, wherein the drying treatment method is characterized by comprising the following steps: in the step S3, the plant straw adopts corn straw, straw or wheat straw.
5. The drying treatment method of the oily sludge according to claim 1, wherein the drying treatment method is characterized by comprising the following steps: the ratio of the plant straw to the oily sludge in the step S3 is 1:1.
6. The drying treatment method of the oily sludge according to claim 1, wherein the drying treatment method is characterized by comprising the following steps: and when the mixture is combusted in the step S4, adding a proper amount of plant straws into the combustion chamber.
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| CN202111548450.0A CN114180797B (en) | 2021-12-17 | 2021-12-17 | Drying treatment method for oily sludge |
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| CN202111548450.0A CN114180797B (en) | 2021-12-17 | 2021-12-17 | Drying treatment method for oily sludge |
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| CN114180797B true CN114180797B (en) | 2023-07-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4316486B2 (en) * | 2004-12-15 | 2009-08-19 | 太平洋セメント株式会社 | Fuel and its use |
| CZ2010807A3 (en) * | 2010-11-08 | 2010-12-22 | Key@Group@Holding@@s@r@o | Organic waste treatment process, organic waste treatment device and use of treated products |
| CN105819644B (en) * | 2016-05-25 | 2019-05-03 | 北京航纳科技有限公司 | A kind of oily sludge innocuity disposal system and method |
| CN206359403U (en) * | 2016-10-20 | 2017-07-28 | 中冶节能环保有限责任公司 | A kind of oily sludge desiccation volatilization innocent treatment equipment |
| CN107162359A (en) * | 2017-05-31 | 2017-09-15 | 北京朗清源节能环保科技有限公司 | Process for treating oil-containing sludge |
| CN108358421B (en) * | 2018-02-02 | 2020-10-30 | 华中科技大学 | Method for simultaneously removing water from sludge and preparing solid fuel and product |
| CN110054383B (en) * | 2019-05-10 | 2021-11-02 | 马平 | Pyrolysis treatment method for oily sludge |
| CN110330198A (en) * | 2019-07-09 | 2019-10-15 | 北京和荣工程技术有限公司 | A kind of oil-sludge treatment method and system |
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