CN113511791B - Greasy dirt screening pretreatment system - Google Patents
Greasy dirt screening pretreatment system Download PDFInfo
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- CN113511791B CN113511791B CN202110840983.XA CN202110840983A CN113511791B CN 113511791 B CN113511791 B CN 113511791B CN 202110840983 A CN202110840983 A CN 202110840983A CN 113511791 B CN113511791 B CN 113511791B
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- screening device
- screw conveyor
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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
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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
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
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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
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to the technical field of oily sludge treatment, and particularly relates to an oil sludge screening pretreatment system. The oil sludge screening pretreatment system comprises a vibration screening device (10), an extrusion screening device (20) and a hot washing screening device (30), wherein the vibration screening device (10), the extrusion screening device (20) and the hot washing screening device (30) are connected with the same material collecting area (40); the vibrating screening device (10) comprises a conveying belt (11) and a vibrating screen (12) positioned above the conveying belt; the first screw conveyor of the extrusion screening device (20) is provided with a speed reduction section (24), and the speed reduction section (24) enables materials to form a material relative stacking area; the hot washing screening device (30) comprises a second screw conveyor, which is located in the hot washing cavity (31). According to the invention, different screening pretreatment modes can be adopted for the oil sludge with different water contents, so that the pertinence and the adaptability of the oil sludge treatment station to different oil sludge are improved.
Description
Technical Field
The invention belongs to the technical field of oily sludge treatment, and particularly relates to an oil sludge screening pretreatment system.
Background
The pyrolysis carbonization technology is gradually becoming a mainstream scheme for oil sludge treatment. The water content of the oil sludge has larger fluctuation, and the oil sludge produced by the same oil field also has different water contents, so most oil fields are provided with an oil sludge sunning field for sunning the water content of the oil sludge to be basically consistent, and the oil sludge enters a pyrolysis carbonization procedure after being screened by a vibrating screen. The pretreatment method is suitable for treating the oil sludge with various water contents, but has lower efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an oil sludge screening pretreatment system, which enables oil sludge with different water contents to be screened and pretreated on a treatment site.
In order to achieve the above object, the technical scheme of the present invention is as follows:
the oil sludge screening pretreatment system comprises a vibration screening device, an extrusion screening device and a hot washing screening device, wherein different screening devices are selected according to the difference of the water content of materials.
The invention is characterized in that: three sets of screening pretreatment devices are arranged on a disposal site, oil sludge with the water content of about 0-30% is screened by a vibration screening device, oil sludge with the water content of about 30-50% is screened by an extrusion screening device, and oil sludge with the water content of more than 50% is screened by a hot washing screening device. The three sets of screening pretreatment devices can rapidly complete screening pretreatment of oil sludge with different water contents generated in the same area or different areas.
As an improvement, the vibration screening device, the extrusion screening device and the hot washing screening device are connected with the same material collecting area. The materials enter the next treatment process after being converged in the same material converging area, so that the properties of the materials entering the next treatment process are relatively stable.
As an improvement, the vibration screening device comprises a conveyor belt and a vibration screen above the conveyor belt. The material with lower water content is directly grabbed to the vibration screen above the conveyer belt by the grab bucket, and the material passing through the vibration screen is conveyed by the conveyer belt and then reaches the material collecting area.
As a further improvement, the extrusion screening device comprises a first screw conveyor, wherein the first screw conveyor is provided with a material inlet, a fine material outlet and a coarse material outlet, the fine material outlet is positioned at the bottom of the first screw conveyor, the first screw conveyor is provided with a deceleration section, and the deceleration section enables materials to form a material relative accumulation area between the fine material outlet and the coarse material outlet. For materials with medium water content, water is extruded by an extrusion method. In this scheme, the material that can fall out from the fine material outlet is defined as fine material, and the material that can not fall out from the fine material outlet because of the granularity is great is defined as coarse material. The material relative accumulation area refers to an area where materials are relatively accumulated due to the fact that the conveying speed of the materials is reduced.
As an improvement, the deceleration section consists of a vaneless zone and a shredding blade zone. The shredding blade area is used to break up large particulate material.
As an improvement, the fine material outlet is provided with a strip-shaped sieve. Once the particulate matter is temporarily stuck on the bar screen, the stuck particulate matter is pushed in both the radial and axial directions under agitation by the screw conveyor shaft. Under the action of radial pushing force, the embedded particles transversely move along the strip-shaped screen, and the axial pushing force is easier to push the particles away from the clamping grooves on the strip-shaped screen during the transverse movement. Therefore, the bar screen is less likely to be clogged than the circular screen holes.
As a further development, the bar screen is formed by a shaft which is fastened to the bottom of the first screw conveyor in a pluggable manner. When the particles are clamped in the bar screen and are not easy to push away, the bar-shaped objects are pulled out, and then the particles naturally fall down.
As a further improvement, the hot washing screening device comprises a second screw conveyor, the second screw conveyor is positioned in the hot washing cavity, the second screw conveyor is provided with sieve holes so that the second screw conveyor is communicated with the hot washing cavity, the liquid level of hot washing liquid in the hot washing cavity is higher than the bottom of the second screw conveyor, the hot washing liquid in the hot washing cavity is used for implementing the hot washing while the material is pushed by the screw blades of the second screw conveyor to move forward, and insoluble materials are led out from the discharge end of the second screw conveyor. For materials with higher water content, the method is combined with a hot washing process. The material is heated and washed while being propelled, so that the material is fully rolled and dissolved, and the heating and washing effect is relatively good. On the other hand, the materials have viscosity, so that the sieve holes are very easy to be blocked under the combined action of insoluble materials with proper particle sizes. As the helical blades of the second screw conveyor rotate, the tips of the helical blades rhythmically crush and scrape the inner wall of the second screw conveyor housing so that insoluble material cannot clog the screen holes.
As a further improvement, the second screw conveyor is provided with a rotary extrusion feeding part below the feeding end, the material is extruded into the second screw conveyor, and the material with the particle size larger than that limited by the rotary extrusion feeding part is directly discharged out of the second screw conveyor.
Due to the presence of the rotary extrusion feed member, material is extruded into the interior of the housing of the second screw conveyor and large particulate material having a particle size greater than the defined particle size is discharged from the housing of the second screw conveyor. The particle size of the materials in the second screw conveyor is guaranteed by rotary extrusion feeding, and meanwhile, the first rolling and dispersing of the materials are finished, so that the hot washing effect is improved.
As an improvement, the second screw conveyor is provided with a shell driving motor, and the shell driving motor drives the shell of the second screw conveyor to rotate. After the shell rotates, the sieve pores continuously circulate from low to high, and repeatedly wash by hot washing liquid, so that the dredging and blocking prevention of the sieve pores are facilitated.
In summary, the oil sludge treatment station can adopt different screening pretreatment modes for oil sludge with different water contents, thereby improving the pertinence and adaptability of the oil sludge treatment station to different oil sludge and being beneficial to improving the pretreatment efficiency and treatment capacity of the oil sludge treatment station.
Drawings
FIG. 1 is a schematic diagram of the apparatus arrangement of the present invention;
FIG. 2 is a schematic diagram of a vibratory screening device according to the present invention;
FIG. 3 is a schematic view of the extrusion screening apparatus of the present invention;
FIG. 4 is a left side view of the extrusion screen apparatus of the present invention;
FIG. 5 is a schematic view of a thermal wash screening device of the present invention, with wavy lines indicating the level of the thermal wash liquid;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5, with the wavy line above the heating coil indicating the level of hot rinse solution;
FIG. 7 is a cross-sectional view taken along B-B in FIG. 5;
fig. 8 is a schematic view of the structure of the rotary extrusion feeding part of the present invention.
In the figure: 10. a vibratory screening device; 11. a conveyor belt; 12. vibrating the screen; 20. extruding and screening devices; 21. a material inlet; 22. a fine material outlet; 221. a bar screen; 23. a coarse material outlet; 24. a deceleration section; 241. a vaneless region; 242. shredding the blade region; 25. a feed hopper; 26. a bracket; 27. a step ladder; 30. a hot washing screening device; 31. a heat washing cavity; 32. a discharge end; 321. a large material outlet; 33. a feed end; 34. rotating the extrusion feed member; 341. extruding a screw; 35. the shell drives the motor; 36. a screw conveying motor; 37. a feeding bin; 38. a cleaning liquid replenishing pipe; 39. and a heating coil.
Detailed Description
Example 1
The invention relates to a system suitable for screening and preprocessing oil sludge with different water contents, which comprises a vibration screening device 10, an extrusion screening device 20 and a hot washing screening device 30 which are arranged in parallel as shown in figure 1. The vibration screening device 10, the extrusion screening device 20 and the hot washing screening device 30 are connected with the same material collecting area 40, and materials output by the screening devices are collected and mixed in the material collecting area 40 and then enter the next treatment process. The oil sludge with the water content of about 0-30% is selected to be screened by the vibration screening device 10, the oil sludge with the water content of about 30-50% is selected to be screened by the extrusion screening device 20, and the oil sludge with the water content of more than 50% is selected to be screened by the hot washing screening device 30. Of course, the above-described classification of water content is a recommended value. In practice, the oil sludge with the water content of 40% can also be selected from the vibration screening device 10 or the hot washing screening device 30.
As shown in fig. 2, vibratory screening device 10 includes a conveyor belt 11 and a vibratory screen 12 positioned above the conveyor belt. For the oil sludge with lower water content, the oil sludge is grabbed to the vibration screen 12 by the grab bucket, large particles are separated by the vibration screen 12, and the oil sludge passing through the vibration screen 12 is conveyed by the conveying belt 11 towards the direction of the material collecting area 40.
As shown in fig. 3 and 4, the extrusion screening device 20 includes a bracket 26, and the bracket 26 is provided with a step 27. The main body of the extrusion screening device 20 is a first screw conveyor which is fixed on a bracket 26 and adopts a double screw shaft structure. The first screw conveyor is provided with a material inlet 21 at the top, and the top of the material inlet 21 is a feed hopper 25. The first screw conveyor is provided with a fine material outlet 22 and a coarse material outlet 23 at the bottom, a deceleration section 24 is arranged between the fine material outlet 22 and the coarse material outlet 23, and the deceleration section comprises a blade-free zone 241 and a shredding blade zone 242. The deceleration section 24 causes the material to form a relatively accumulation zone between the fine material outlet 22 and the coarse material outlet 23.
The fine material outlet is provided with a strip-shaped sieve 221, the strip-shaped sieve 221 is formed by fixing rod-shaped objects at the bottom of the first screw conveyor in a pluggable manner, and the gap between the adjacent rod-shaped objects is 30-40mm. The shell of the first screw conveyor is provided with a jack for accommodating the rod, and the jack is in clearance fit with the rod so that the rod can rotate. When the particles are temporarily clamped and embedded on the strip-shaped screen, the rod-shaped object can roll at a certain angle along with the advancing of the materials, so that the clamped and embedded particles can be conveniently advanced. When the particles are clamped in the bar screen and are not easy to push away, the problem can be solved by pulling out the rod-shaped object.
For the greasy dirt with higher water content, the hot washing screening device 30 is adopted for screening pretreatment. As shown in fig. 5, the hot washing screening device 30 comprises a second screw conveyor, the second screw conveyor is provided with a feeding end 33 and a discharging end 32, the top of the feeding end 33 is a feeding bin 37, a rotary extrusion feeding part 34 is arranged below the feeding end 33, the rotary extrusion feeding part 34 is a part of a shell of the second screw conveyor, the rotary extrusion feeding part 34 is structured as shown in fig. 8, a grid is arranged on the rotary extrusion feeding part 34, extrusion screws 341 are arranged on two sides of the rotary extrusion feeding part 34, and the rotary extrusion screws 341 realize auxiliary extrusion of oil sludge. The rotary extrusion feeding part 34 is externally provided with a rotary feeding cavity, the rotary feeding cavity is provided with a large material outlet 321, and as shown in fig. 5 and 7, the material is extruded into the second screw conveyor, and the material with the particle size larger than that defined by the rotary extrusion feeding part 34 is directly discharged from the large material outlet 321.
As shown in fig. 5 and 6, the second screw conveyor is integrally located in the hot washing cavity 31, and the casing of the second screw conveyor is provided with a sieve mesh to enable the second screw conveyor to be communicated with the hot washing cavity 31, and the liquid level of hot washing liquid in the hot washing cavity 31 is higher than the bottom of the second screw conveyor, so that the hot washing liquid can enter the second screw conveyor through the sieve mesh. The second screw conveyor adopts a single screw shaft structure, and the single screw shaft of the second screw conveyor is driven by a screw conveyor motor 36. The material is pushed by the helical blade of the second screw conveyor to advance and is subjected to hot washing by the hot washing liquid in the hot washing cavity 31, oil in the material is dissolved in the hot washing liquid and enters the hot washing cavity 31 along with the oil sewage through the sieve holes, and insoluble material is led out from the discharge end 32 of the second screw conveyor. The second screw conveyor is provided with a housing driving motor 35, and the housing driving motor 35 drives the housing of the second screw conveyor to rotate.
The bottom of the hot washing cavity 31 is obliquely arranged, and the bottom of the hot washing cavity 31 is provided with a cleaning liquid supplementing pipe 38 for supplementing the hot washing liquid in the hot washing cavity 31. The level of the hot wash liquid is preferably 1/3 of the submerged screw conveyor. A heating coil 39 is provided in the hot wash chamber 31 for heating the hot wash liquor.
Claims (5)
1. Greasy dirt screening pretreatment systems, including vibration screening plant (10), its characterized in that: the device also comprises an extrusion screening device (20) and a hot washing screening device (30), and different screening devices are selected according to the different water contents of the materials; the vibration screening device (10), the extrusion screening device (20) and the hot washing screening device (30) are connected with the same material collecting area (40), and the materials enter the next treatment procedure after being collected in the same material collecting area (40);
the extrusion screening device (20) comprises a first screw conveyor, wherein the first screw conveyor is provided with a material inlet (21), a fine material outlet (22) and a coarse material outlet (23), the fine material outlet (22) is positioned at the bottom of the first screw conveyor, the first screw conveyor is provided with a speed reduction section (24), and the speed reduction section (24) enables materials to form a material relative accumulation area between the fine material outlet (22) and the coarse material outlet (23);
the hot washing screening device (30) comprises a second spiral conveyor, the second spiral conveyor is positioned in a hot washing cavity (31), a shell of the second spiral conveyor is provided with sieve holes so that the second spiral conveyor is communicated with the hot washing cavity (31), the liquid level of hot washing liquid in the hot washing cavity (31) is higher than the bottom of the second spiral conveyor so that the hot washing liquid can enter the second spiral conveyor through the sieve holes, materials are pushed by spiral blades of the second spiral conveyor to advance and are subjected to hot washing by the hot washing liquid in the hot washing cavity (31), and insoluble materials are led out from a discharge end (32) of the second spiral conveyor;
the second screw conveyor is provided with a shell driving motor (35), and the shell driving motor (35) drives the shell of the second screw conveyor to rotate; the second screw conveyor is provided with a rotary extrusion feeding part (34) below the feeding end (33), the rotary extrusion feeding part (34) is a part of a shell of the second screw conveyor, a grid is arranged on the rotary extrusion feeding part (34), extrusion screws (341) are arranged on two sides of the rotary extrusion feeding part (34), and the auxiliary extrusion of greasy dirt is realized by the rotation of the extrusion screws (341); the material is extruded into the second screw conveyor, and the material with the particle size larger than that limited by the rotary extrusion feeding part (34) is directly discharged out of the second screw conveyor; the rotary extrusion feeding part (34) is provided with a rotary feeding cavity outside, and the rotary feeding cavity is provided with a large material outlet (321).
2. The oil sludge screening pretreatment system of claim 1, wherein: the vibrating screening device (10) comprises a conveying belt (11) and a vibrating screen (12) positioned above the conveying belt.
3. The oil sludge screening pretreatment system of claim 1, wherein: the deceleration section includes a vaneless zone (241) and a shredding blade zone (242).
4. The oil sludge screening pretreatment system of claim 1, wherein: the fine material outlet (22) is provided with a strip-shaped sieve (221).
5. The oil sludge screening pretreatment system of claim 4, wherein: the bar screen (221) is formed by a rod-shaped object which is fixed at the bottom of the first screw conveyor in a pluggable manner.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110840983.XA CN113511791B (en) | 2021-07-25 | 2021-07-25 | Greasy dirt screening pretreatment system |
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|---|---|---|---|
| CN202110840983.XA CN113511791B (en) | 2021-07-25 | 2021-07-25 | Greasy dirt screening pretreatment system |
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| CN113511791A CN113511791A (en) | 2021-10-19 |
| CN113511791B true CN113511791B (en) | 2023-05-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115286209B (en) * | 2022-06-28 | 2023-08-15 | 上海凌逍环保科技有限公司 | Sludge depth reduction system and application method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE4211657C1 (en) * | 1992-04-07 | 1993-07-01 | Hans Huber Gmbh, 8434 Berching, De | |
| CN104496138B (en) * | 2014-12-25 | 2016-04-20 | 郭朝军 | Oily sludge separating treatment equipment |
| CN108675577A (en) * | 2018-05-22 | 2018-10-19 | 四川深蓝环保科技有限公司 | A kind of processing method of oily sludge |
| CN112174459A (en) * | 2020-10-30 | 2021-01-05 | 芜湖海创实业有限责任公司 | Oily sludge pretreatment system and treatment method |
| CN113121079B (en) * | 2021-04-26 | 2023-03-31 | 浙江宜可欧环保科技有限公司 | Screening device for coarse and fine materials of high-liquid-content oil sludge |
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