Leaching and deoiling device for oil sludge

Abstract

The utility model provides a leaching oil removal device for oil sludge, and relates to the field of oil sludge pollution abatement, an oil suction machine is arranged at the upper part of a double-helix sorting machine, and the rear end of the oil suction machine is connected with an oil collection barrel; a slurry tank is arranged at the lower part of the double-helix sorting machine, and the rear end of the slurry tank is connected with a mortar pump; the rear portion of the double-spiral sorting machine is connected with a mortar tank, the rear end of the mortar tank is connected with a mortar pump, the rear end of the mortar pump is provided with a chute sorting machine, a water storage pond and an oil storage pond are arranged below the chute sorting machine, the rear end of the chute sorting machine is connected with a single-spiral sorting machine, and the rear end of the single-spiral sorting machine is connected with a dewatering screen. According to the oil sludge separation device, effective separation of gravel clay particles, light oil and sheet-shaped aging oil in oil sludge is realized; effective technical means such as stirring pulping, gravity separation and vibration dehydration are combined in the whole process, light oil and flaky aging oil in the polluted soil can be thoroughly separated, and the treatment effect of purifying the oil sludge is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oil sludge pollution treatment, especially to a kind of oil sludge's leaching oil removal device. BACKGROUND

[0002] Oil sludge is one of the main pollution sources of petroleum industry, and is a kind of oil-containing solid waste with resource recycling value generated in the process of oil exploitation, well repair, gathering and transportation, oil refining, transportation and storage. According to incomplete statistics, China's petrochemical industry produces 800,000 tons of oil sludge per year on average, and the whole petrochemical industry produces 60 million tons of oil sludge per year on average.

[0003] With the rapid development of petroleum industry, the production of oil sludge is also increasing rapidly, which not only causes serious pollution to the environment, but also brings great pressure to the production of enterprises, so the treatment of oil sludge has become a problem to be solved in the petroleum industry.

[0004] Currently, physical method, chemical method and biological method are mainly used for oil sludge treatment, but these treatment technologies have low efficiency, high cost, secondary pollution and complicated operation steps in actual engineering application, so we propose an oil sludge oil removal device to solve the above problems. UTILITY MODEL CONTENT

[0005] In view of the problems existing in the prior art, the utility model provides an oil sludge oil removal device to solve the problems in the prior art.

[0006] A kind of oil sludge's leaching oil removal device, including sorting mechanism, storage mechanism, functional mechanism.

[0007] Further, the sorting mechanism includes double helix sorting machine; The storage mechanism includes slurry tank, mortar tank, water storage pool, oil storage pool, oil collecting barrel; The functional mechanism includes mortar pump, chute sorting machine, single helix sorting machine, dehydration screen, oil suction machine.

[0008] Further, the upper portion of the double helix sorting machine is provided with an oil suction machine, and the rear end of the oil suction machine is connected with an oil collecting barrel.

[0009] Further, the lower portion of the double helix sorting machine is provided with a slurry tank, and the rear end of the slurry tank is connected with a mortar pump.

[0010] Further, the rear portion of the double helix sorting machine is connected with a mortar tank, the rear end of the mortar tank is connected with a mortar pump, the rear end of the mortar pump is provided with a chute sorting machine, the lower portion of the chute sorting machine is respectively provided with a water storage pool and an oil storage pool, the rear end of the chute sorting machine is connected with a single helix sorting machine, and the rear end of the single helix sorting machine is connected with a dehydration screen.

[0011] Further, the double helix sorting machine includes flat helix, inclined helix and communication port.

[0012] Furthermore, a flow stabilization area, a sedimentation area and an oil extraction area are provided above the double flat spirals.

[0013] The beneficial effects of the utility model are:

[0014] 1. During the operation of this device, the entire process combines effective technical means such as stirring and slurrying, gravity separation, and vibration dehydration, which can more thoroughly separate the light oil from the sludge and remove the flaky aging oil in the sludge, achieving the treatment effect of purifying the sludge and producing clean sand and gravel clay.

[0015] 2. This device can separate the oil sludge into upper floating oil, middle overflow mud and lower mud sand for recovery.

[0016] 3. Clean water can be recycled during the recovery process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the oil sludge washing and oil removal device of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the double-spiral separator of the utility model;

[0019] Among them, 1. Double spiral separator; 2. Mud tank; 3. Mortar pump; 4. Mortar tank; 5. Water storage tank; 6. Chute separator; 7. Oil storage tank; 8. Single spiral separator; 9. Dewatering screen; 10. Oil suction machine; 11. Oil collecting barrel; 101. Flat spiral; 102. Inclined spiral; 103. Connecting port; 104. Steady flow area; 105. Sedimentation area; 106. Oil extraction area. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] A device for washing and removing oil from oily sludge comprises a sorting mechanism, a storage mechanism, and a functional mechanism. The sorting mechanism comprises a double-helix separator 1, wherein the double-helix separator 1 comprises a flat helix 101, an inclined helix 102, and a connecting port 103. A return stroke is formed by the flat helix 101, the inclined helix 102, and the connecting port 103, thereby realizing feeding and discharging at the same end. The oily sludge is fed from the flat helix 101 and discharged from the inclined helix 102.

[0022] The flat spiral 101 of the double spiral separator 1 is provided with a steady flow area 104 and a sedimentation area 105, and an oil extraction area 106, the oil extraction area 106 is used to extract the upper layer of light oil, and the sedimentation area 105 is used to precipitate the lower layer of mud and sand. The double spiral separator 1 mainly separates light oil and mud and sand.

[0023] The storage mechanism is used to store the substances formed in the working process of oil sludge, and the storage mechanism includes a mud tank 2, a sand tank 4, a water storage pool 5, an oil storage pool 7, and an oil collecting barrel 11.

[0024] The function mechanism includes a sand pump 3, a chute separator 6, a single spiral separator 8, a dehydration screen 9, and an oil suction machine 10.

[0025] The upper part of the double spiral separator 1 is provided with an oil suction machine 10, which is used to absorb the uppermost layer of light oil, and the rear end of the oil suction machine 10 is connected with an oil collecting barrel 11, which is used to store the uppermost layer of light oil absorbed by the oil suction machine 10.

[0026] The lower part of the double spiral separator 1 is provided with a mud tank 2, and the rear end of the mud tank 2 is connected with a sand pump 3; the sand pump 3 is used to send the middle layer of overflow mud slurry to a concentration pressure filtration module.

[0027] The rear part of the double spiral separator 1 is connected with a sand tank 4, which is used to receive the lower layer of mud and sand.

[0028] The rear end of the sand tank 4 is connected with a sand pump 3, the rear end of the sand pump is provided with a chute separator 6, the lower part of the chute separator 6 is respectively provided with a water storage pool 5 and an oil storage pool 7, the rear end of the chute separator 6 is connected with a single spiral separator 8, the rear end of the single spiral separator 8 is connected with a dehydration screen 9, and the single spiral separator 8 is used to separate the innermost layer of fine sand mud; the lower layer of mud and sand enters the sand tank 4, and then is pumped into the chute separator 6 after being rinsed and stirred with circulating clean water; the chute separator 6 separates the materials by gravity. The water added in the sand tank 4 is circulating clean water, which is pumped from the water storage pool 5.

[0029] The operating principle is as follows: After the oily mud is pumped into the double-screw separator 1, the top layer of light floating oil is extracted by the oil suction pump 10 and discharged into the oil collection drum 11. The middle layer of overflow mud enters the mud tank 2 and is sent to the concentration filter press module by the slurry pump 3. The lower layer of mud and sand is pushed into the mortar tank 4, where it is mixed with water and then pumped by the slurry pump to the chute separator 6. The chute separator 6 separates the fine sand mud into three materials based on their specific gravity: the outermost layer of clean water, the innermost layer of fine sand mud, and the middle layer of flaky aged oil. The outermost layer of clean water is discharged into the water storage tank 5 to form the aforementioned circulating clean water. The middle layer of flaky aged oil enters the oil storage tank 7. The innermost layer of fine sand mud enters the single-screw separator 8, and is finally pushed by the single-screw separator 8 into the dewatering screen 9. The dewatering screen 9 dewaters the innermost layer of fine sand mud through vibration, converting it into clean fine sand for discharge.

[0030] During the whole process, the clean water discharged into the water storage tank 5 is pumped into the mortar tank 4 again to be mixed with mud and sand to form a closed-loop waterway, thereby realizing the reuse of the clean water.

[0031] The oily sludge is processed by the device to form the clean fine sand and then discharged.

[0032] In order to verify the treatment effect of this device, a corresponding pilot test was carried out, and the sludge treatment capacity was 200m 3 The crude oil sludge has an oil content of 35200 mg / kg, or 3.52%. Three batches of clean fine sand samples were randomly taken, with 1000g of each sample sent to the laboratory for testing. The test results are as follows:

[0033] Table 1 Oil content of sludge after treatment by this device

[0034]

[0035] Table 1

[0036] It can be seen from this that the oily sludge treated by the device of the utility model has reached the corresponding national standards.

[0037] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for washing and removing oil from oil sludge, comprising a sorting mechanism, a storage mechanism, and a functional mechanism, characterized in that The separation mechanism comprises a double-screw separator (1); the storage mechanism comprises a mud tank (2), a mortar tank (4), a water storage tank (5), an oil storage tank (7), and an oil collecting barrel (11); and the functional mechanism comprises a mortar pump (3), a chute separator (6), a single-screw separator (8), a dewatering screen (9), and an oil suction machine (10).

2. The sludge washing and oil removal device according to claim 1, characterized in that: An oil suction machine (10) is provided on the upper part of the double-screw separator (1), and an oil collecting barrel (11) is connected to the rear end of the oil suction machine (10).

3. The sludge washing and oil removal device according to claim 1, characterized in that: A mud trough (2) is provided at the lower part of the double-screw separator (1), and a mortar pump (3) is connected to the rear end of the mud trough (2).

4. The sludge washing and oil removal device according to claim 1, characterized in that: The rear part of the double-screw separator (1) is connected to a mortar trough (4), the rear end of the mortar trough (4) is connected to a mortar pump, the rear end of the mortar pump is provided with a chute separator (6), a water storage tank (5) and an oil storage tank (7) are provided below the chute separator (6), the rear end of the chute separator (6) is connected to a single-screw separator (8), and the rear end of the single-screw separator (8) is connected to a dewatering screen (9).

5. The sludge washing and oil removal device according to claim 1, characterized in that: The double-helix separator (1) comprises a flat helix (101), an oblique helix (102) and a communication port (103).

6. The sludge washing and oil removal device according to claim 5, characterized in that: A flow stabilization zone (104), a sedimentation zone (105), and an oil extraction zone (106) are provided above the double flat spirals (101).

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