CN117003451A - Physical chemical hot washing process for oily sludge - Google Patents
Physical chemical hot washing process for oily sludge Download PDFInfo
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- CN117003451A CN117003451A CN202311221964.4A CN202311221964A CN117003451A CN 117003451 A CN117003451 A CN 117003451A CN 202311221964 A CN202311221964 A CN 202311221964A CN 117003451 A CN117003451 A CN 117003451A
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- 239000010802 sludge Substances 0.000 title claims abstract description 96
- 238000005406 washing Methods 0.000 title claims abstract description 77
- 239000000126 substance Substances 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000011084 recovery Methods 0.000 claims abstract description 45
- 238000000926 separation method Methods 0.000 claims abstract description 29
- 238000007599 discharging Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000003860 storage Methods 0.000 claims abstract description 16
- 238000004062 sedimentation Methods 0.000 claims abstract description 15
- 239000010865 sewage Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 239000008394 flocculating agent Substances 0.000 claims abstract description 3
- 239000003814 drug Substances 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 14
- 238000004064 recycling Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000010907 mechanical stirring Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 229940079593 drug Drugs 0.000 claims description 3
- 238000004880 explosion Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 239000013043 chemical agent Substances 0.000 claims 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000005191 phase separation Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 55
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- 239000003208 petroleum Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 239000012752 auxiliary agent Substances 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 1
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- KEZYHIPQRGTUDU-UHFFFAOYSA-N 2-[dithiocarboxy(methyl)amino]acetic acid Chemical compound SC(=S)N(C)CC(O)=O KEZYHIPQRGTUDU-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- -1 amine ester Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011085 pressure filtration Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a physical and chemical thermal washing process for oily sludge, and relates to the technical field of oily sludge treatment. The method comprises the following steps: carrying out preliminary separation on the oily sludge in the rough washing section, discharging the separated oil into a dirty oil recovery tank for storage, and discharging the residual oily sludge into the fine washing section; the oil-containing sludge is subjected to secondary washing separation in the fine washing section, separated oil is discharged into a dirty oil recovery tank for storage, and the residual oil-containing sludge is discharged into the rinsing section; adding clear water into the rinsing section, rinsing the oily sludge to completely separate dirty oil, discharging the separated oil into a dirty oil recovery tank for storage, and discharging the separated water and the sludge into the settling section; adding a flocculating agent into the sedimentation section to enable suspended matters in water to sink, discharging separated water and mud into a filter press, performing solid-liquid separation on the water and the mud by the filter press, discharging the separated water into a sewage recovery tank, and discharging the separated mud into a mud recovery tank. The process realizes the three-phase separation of the oil-water mud, and has the advantages of low oil content after separation, good separation effect, low cost, high efficiency, environmental protection and no pollution.
Description
Technical Field
The invention relates to the technical field of treatment of oily sludge, in particular to a physical and chemical heat washing process of oily sludge.
Background
The oily sludge is sludge mixed with heavy oil such as crude oil, oil residue, and various product oils, and is not inherently present in nature. The oil-containing water-clay mixture is a mixture which is produced in the petroleum development, refining, processing, transportation, production and other processes and is mixed with water and clay to form oil-containing water-clay mixture and even other pollutants. In particular, oilfield oily sludge has been classified by the country as hazardous solid waste (HW 08), which is included in hazardous waste for management. The oil-containing sludge has high yield in petroleum industry, if the oil-containing sludge is improperly treated, the surrounding environment is polluted, the water content of the oil-containing sludge in an oil field is generally 70% -99%, the content of oil and salt components is high, and the oil-containing sludge can be approximately divided into water, emulsified oil or adsorbed oil, solid foreign matters, inorganic salt and the like. It is necessary to perform a reduction treatment before performing the innocent treatment, thereby reducing the volume of the oily sludge. With the increasing global demand for petroleum resources, the yield of oily sludge is increasing, and the awareness of environmental protection and sustainable development is increasing, so how to control the pollution of oily sludge to the environment has become an important issue of interest in petrochemical industry.
At present, the treatment technology of the oily sludge is developed rapidly, and various oily sludge treatment methods represented by tempering-separation, chemical heat washing, pyrolysis method, incineration method and the like are applied to oil-gas fields and refinery enterprises. However, the above treatment methods have certain defects, wherein the sludge treated by the tempering-separating-settling method has higher water content and oil content, and the direct landfill requirement of the treated waste is difficult to be met, so that the method can only be used as a pretreatment method of the oily sludge; the solvent extraction method is easy to carry out continuous and long-distance operation, saves energy, but has overlarge equipment investment and high cost, and the existing extraction method is not widely used for treating oil-containing sludge in oil fields; the biological treatment method utilizes the original microorganism to treat, the higher the oil removal rate is along with the time extension, the more obvious the degradation effect is, and the emission standard can be reached, but the method has large occupied area and long treatment time; the incineration method is the most thorough treatment method of the oily sludge, but has the advantages of large investment, high treatment cost, easy generation of highly toxic substances such as dioxin and the like, complicated flue gas purification measures and increased treatment cost.
Disclosure of Invention
The invention mainly aims to provide the physical and chemical heat washing process for the oily sludge, which has the advantages of good separation effect, low cost, high efficiency, environmental protection and no pollution and can realize the recycling utilization, so as to solve the technical problems in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the physical and chemical heat washing process of the oily sludge comprises the following steps:
s1, rough washing: the oily sludge treated by the crusher enters a rough washing section, the oily sludge is primarily separated in the rough washing section, separated oil is discharged into a dirty oil recovery tank for storage, and the residual oily sludge is discharged into a fine washing section;
s2, fine washing: the oil-containing sludge subjected to primary separation is subjected to secondary washing separation in a fine washing section, further separation is carried out, separated oil is discharged into a dirty oil recovery tank for storage, and the residual oil-containing sludge is discharged into a first rinsing section;
s3, a first rinsing section: adding clear water into the rinsing section, rinsing the oily sludge after secondary washing and separation to further separate the oily sludge, discharging separated oil into a dirty oil recovery tank for storage, and discharging the residual oily sludge into a second rinsing section;
s4, a second rinsing section: the oily sludge separated by the first rinsing section is rinsed for the second time, dirty oil is completely separated, the separated oil is discharged into a dirty oil recovery tank for storage, and the separated water and the mud are discharged into a sedimentation section;
s5, sedimentation: performing static separation on water and mud in a sedimentation section, sinking suspended matters, and discharging the separated water and mud into a filter press;
s6, filter pressing: and (3) carrying out solid-liquid separation on the water and the mud discharged from the sedimentation section through a plate-and-frame filter press, discharging the separated water into a sewage recovery tank, and discharging the separated mud into the sludge recovery tank.
S7, recycling resources: the separated water in the sewage recovery tank is used as water for preparing medicines for recycling, and the sludge in the separated sludge recovery tank is used for greening or repairing roads.
Further, when the oily sludge is separated in the step S1 rough washing section and the step S2 fine washing section, the oily sludge is treated by adopting modes of medicament soaking, mechanical stirring and air stirring.
Further, the stirring time of the rough washing section and the fine washing section is 40-60min, the temperature is 70-80 ℃, and the medicament concentration is 5-7%.
Further, the medicament is pumped into the rough washing section and the fine washing section from the medicament recovery tank, a water inlet of the medicament recovery tank is communicated with the sewage recovery tank, and water separated by the plate-and-frame filter press enters the medicament recovery tank to be used as medicament preparation water.
Furthermore, during mechanical stirring treatment, a horizontal double-paddle stirrer is adopted to stir the oily sludge, and during air stirring treatment, compressed air is pumped into the rough washing section and the fine washing section by an air compressor to perform air vibration explosion on fine parts of materials.
Further, the crusher in step S1 is a shear crusher.
Further, in the step S4, the second rinsing section is stirred for 10-20min after adding the flocculating agent.
Further, the oil content of the sludge subjected to pressure filtration in the step S6 is less than 3%, and then the sludge is dried or baked.
Further, the dirty oil separated from the rough washing section, the fine washing section, the first rinsing section and the second rinsing section enters the dirty oil recovery tank through a common pipeline.
Compared with the prior art, the invention has the following beneficial effects:
the three-phase separation target of the oil cement is completed through the rough washing section, the fine washing section, the first rinsing section, the second rinsing section, the sedimentation section and the plate-and-frame filter press, so that the oil content reaches the treatment standard; the oil content of the treated sludge is less than 3%, and then the sludge is dried or baked, so that the sludge can be used for greening or repairing roads, and water separated by the plate-and-frame filter press enters a medicament recovery tank to be used as water for preparing medicaments, so that water recycling is realized.
Drawings
FIG. 1 is a flow chart of the overall process of the present invention.
Detailed Description
The technical scheme of the invention is further described below through the attached drawings and the embodiments.
Referring to fig. 1, the invention provides a physicochemical heat washing process of oily sludge, which mainly comprises the following steps of rough washing, fine washing, primary rinsing, secondary rinsing, sedimentation and filter pressing:
s1, rough washing: the oily sludge treated by the crusher enters a rough washing section, the oily sludge is primarily separated in the rough washing section, separated oil is discharged into a dirty oil recovery tank for storage, and the residual oily sludge is discharged into a fine washing section;
s2, fine washing: the oil-containing sludge subjected to primary separation is subjected to secondary washing separation in a fine washing section, further separation is carried out, separated oil is discharged into a dirty oil recovery tank for storage, and the residual oil-containing sludge is discharged into a first rinsing section;
s3, a first rinsing section: adding clear water into the rinsing section, rinsing the oily sludge after secondary washing and separation to further separate the oily sludge, discharging separated oil into a dirty oil recovery tank for storage, and discharging the residual oily sludge into a second rinsing section;
s4, a second rinsing section: the oily sludge separated by the first rinsing section is rinsed for the second time, dirty oil is completely separated, the separated oil is discharged into a dirty oil recovery tank for storage, and the separated water and the mud are discharged into a sedimentation section;
s5, sedimentation: performing static separation on water and mud in a sedimentation section, sinking suspended matters, and discharging the separated water and mud into a filter press;
s6, filter pressing: and (3) carrying out solid-liquid separation on the water and the mud discharged from the sedimentation section through a plate-and-frame filter press, discharging the separated water into a sewage recovery tank, and discharging the separated mud into the sludge recovery tank.
S7, recycling resources: the separated water in the sewage recovery tank is used as water for preparing medicines for recycling, and the sludge in the separated sludge recovery tank is used for greening or repairing roads.
The process of the invention can be used for treating the oily sludge in the fields of petroleum and petrochemical industry, steel and iron, mechanical processing, ship oil tank sludge, wharf oil tank storage areas and the like; by adopting the steps, the oil-containing sludge can be subjected to three-phase separation of oil cement through different process sections, so that the oil content reaches the treatment standard, the oil and water are treated, and the sludge is recycled.
Preferably, in this embodiment, the coarse washing, the fine washing, the first rinsing section and the second rinsing section all adopt two sets of skid-mounted equipment arranged in parallel to perform treatment, so as to increase working efficiency.
Preferably, when the oily sludge is separated in the step S1 rough washing stage and the step S2 fine washing stage, the oily sludge is treated by means of chemical soaking, mechanical stirring and air stirring. The mechanical stirring and air stirring modes are adopted to stir the materials in the main body simultaneously, so that a good separation effect is achieved, and the separation efficiency is improved.
In the embodiment, the stirring time of the rough washing section and the fine washing section is 40-60min, the temperature is 70-80 ℃, and the medicament concentration is 5-7%. The relative low temperature of 70-80 ℃ is adopted, so that the main nutrient components of the sludge are protected, and the sludge can be used for landscaping, roadbed construction and other purposes.
Preferably, the medicament comprises a main agent and an auxiliary agent, wherein the concentration of the main agent is 5%, and the main agent comprises the following raw materials in percentage by mass: sodium metasilicate pentahydrate 0.5-4.5%, potassium hydroxide 0.01-40.03%, glycerol 1-43%, organic amine ester 5-48%, heavy sodium carbonate 1-43%, aliphatic alcohol polyether 0.5-4%, nonionic surfactant 1-43%; the balance being water; the concentration of the auxiliary agent is 2%, and the mass percentages of the raw materials of the auxiliary agent are as follows: 0.1 to 40.4 percent of potassium hydroxide, 1 to 43 percent of low-foam special surfactant, 1 to 42.5 percent of heavy oil soaking degreasing special surfactant, 2 to 45 percent of ethylene glycol butyl ether and 1 to 43 percent of oil and wax removing special surfactant; the balance being water.
In this embodiment, the medicament is pumped into the rough washing section and the fine washing section from the medicament recovery tank, a water inlet of the medicament recovery tank is communicated with the sewage recovery tank, and water separated by the plate-and-frame filter press enters the medicament recovery tank to be used for preparing the medicament.
In the embodiment, the oil-containing sludge is stirred by adopting a horizontal double-paddle stirrer during mechanical stirring treatment, and spiral blades with opposite rotation directions are arranged in the horizontal double-paddle stirrer, so that the relative rotation can occur, and the stirring efficiency of materials is improved; during air stirring treatment, compressed air is pumped into the rough washing section and the fine washing section by an air compressor to perform air vibration explosion on fine parts of materials, micro bubbles are pumped into the materials by the air compressor through air holes in an air pipe and blasted at any time, so that fine partial high-pressure bombardment on the materials is formed, oil-water in the surfaces of silt and gaps is rapidly stripped, preliminary separation of oil-water is realized, and separation effect is improved.
In this embodiment, the crusher in step S1 is a shear crusher.
In this example, the second rinse stage of step S4 is operated for 10-20 minutes with stirring after the addition of the flocculant.
In this embodiment, the oil content of the sludge after the filter pressing in step S6 is less than 3%, and then the sludge is dried or baked for greening or repairing roads.
In this embodiment, the dirty oil separated in the rough washing section, the fine washing section, the first rinsing section and the second rinsing section enters the dirty oil recovery tank through a common pipeline.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention still fall within the scope of the technical solutions of the present invention.
Claims (9)
1. The physical and chemical hot washing process for the oily sludge is characterized by comprising the following steps of:
s1, rough washing: the oily sludge treated by the crusher enters a rough washing section, the oily sludge is primarily separated in the rough washing section, separated oil is discharged into a dirty oil recovery tank for storage, and the residual oily sludge is discharged into a fine washing section;
s2, fine washing: the oil-containing sludge subjected to primary separation is subjected to secondary washing separation in a fine washing section, further separation is carried out, separated oil is discharged into a dirty oil recovery tank for storage, and the residual oil-containing sludge is discharged into a first rinsing section;
s3, a first rinsing section: adding clear water into the rinsing section, rinsing the oily sludge after secondary washing and separation to further separate the oily sludge, discharging separated oil into a dirty oil recovery tank for storage, and discharging the residual oily sludge into a second rinsing section;
s4, a second rinsing section: the oily sludge separated by the first rinsing section is rinsed for the second time, dirty oil is completely separated, the separated oil is discharged into a dirty oil recovery tank for storage, and the separated water and the mud are discharged into a sedimentation section;
s5, sedimentation: performing static separation on water and mud in a sedimentation section, sinking suspended matters, and discharging the separated water and mud into a filter press;
s6, filter pressing: and (3) carrying out solid-liquid separation on the water and the mud discharged from the sedimentation section through a plate-and-frame filter press, discharging the separated water into a sewage recovery tank, and discharging the separated mud into the sludge recovery tank.
S7, recycling resources: the separated water in the sewage recovery tank is used as water for preparing medicines for recycling, and the sludge in the separated sludge recovery tank is used for greening or repairing roads.
2. The physicochemical heat washing process of claim 1, wherein the oily sludge is treated by means of chemical soaking, mechanical stirring and air stirring when the oily sludge is separated in the step S1 coarse washing section and the step S2 fine washing section.
3. The process according to claim 2, wherein the stirring time of the coarse washing section and the fine washing section is 40-60min, the temperature is 70-80 ℃, and the agent concentration is 5-7%.
4. The physicochemical heat washing process of oil-containing sludge according to claim 2, wherein the chemical agent is pumped into the rough washing section and the fine washing section from a chemical agent recovery tank, a water inlet of the chemical agent recovery tank is communicated with the sewage recovery tank, and water separated by the plate-and-frame filter press enters the chemical agent recovery tank as water for preparing chemical agent.
5. The process for physicochemical heat washing of oily sludge according to claim 2, wherein the oily sludge is stirred by a horizontal double-paddle stirrer during mechanical stirring treatment, and compressed air is pumped into the rough washing section and the fine washing section by an air compressor during air stirring treatment to perform air explosion on fine parts of materials.
6. The physicochemical heat washing process of claim 1, wherein the crusher in the step S1 is a shear crusher.
7. The physicochemical heat washing process of the oily sludge according to claim 1, wherein the second rinsing stage of the step S4 is performed for 10-20min after adding the flocculating agent.
8. The physicochemical heat washing process of claim 1, wherein the oil content of the sludge after the filter pressing in the step S6 is less than 3%, and the sludge is dried or baked.
9. An oil-containing sludge physicochemical heat wash process as in claim 1 wherein the separated dirty oil from the coarse wash stage, the fine wash stage, the first rinse stage and the second rinse stage enters the dirty oil recovery tank through a common pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311221964.4A CN117003451A (en) | 2023-09-21 | 2023-09-21 | Physical chemical hot washing process for oily sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311221964.4A CN117003451A (en) | 2023-09-21 | 2023-09-21 | Physical chemical hot washing process for oily sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117003451A true CN117003451A (en) | 2023-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311221964.4A Pending CN117003451A (en) | 2023-09-21 | 2023-09-21 | Physical chemical hot washing process for oily sludge |
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| Country | Link |
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| CN (1) | CN117003451A (en) |
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- 2023-09-21 CN CN202311221964.4A patent/CN117003451A/en active Pending
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