CN210560000U - Mobile oil sludge treatment system - Google Patents

Abstract

A mobile sludge treatment system having a frame and an on-board unit disposed on the frame, the on-board unit comprising in sequence from the front of the frame to the rear: the setting is in the machine of grinding of frame front side, close on the oil separator that the machine set up, the hydroextractor for the mixture of mud and water of the multicavity room cell type oil water separator, fatlute cleaning machine and the frame length direction setting, this portable sludge treatment system can accomplish the purification treatment technology of whole fatlute pollutant with minimum system configuration, can portable operation, has improved the flexibility that the place used, reduces the cost of sludge treatment.

Description

Mobile oil sludge treatment system

Technical Field

The utility model relates to a sludge treatment process specifically is a portable sludge treatment system.

Background

The oil-gas field is difficult to avoid oil leakage in the production, transportation and refining processes, and forms oil sludge by being mixed with ground soil, and in addition, tank cleaning bottom mud and sludge produced by an oil field sewage treatment station are collectively called as oil-containing sludge. The oily sludge mainly comprises oil, mud, sand and the like, is also mixed with petroleum production tools and part of domestic garbage, has complex components, serious harm to the environment and huge waste yield.

At present, the method for recycling the oil sludge at home and abroad is mainly a thermal desorption method, the existing thermal desorption method comprises direct thermal desorption and indirect thermal desorption, the direct thermal desorption basically takes hot steam as a heat source, the hot steam is directly introduced into a pyrolysis furnace, and the oil sludge is heated to the required temperature, so that the oil content in the oil sludge is reduced to the required level; the indirect thermal desorption method is to send the oil sludge into a rotary furnace and heat the external part of the rotary furnace to realize the separation of oil vapor and sludge. However, the thermal desorption method has problems of low energy utilization rate and high unit treatment cost, and only extracts and recovers most of petroleum substances, but cannot completely recover and reuse sludge.

Disclosure of Invention

In order to solve the problem, the utility model provides a portable sludge treatment system.

One aspect of the application provides a portable sludge treatment system, and it carries out purification treatment to the fatlute pollutant, specifically constitutes as follows:

the vehicle-mounted equipment comprises a frame and vehicle-mounted equipment arranged on the frame, wherein the vehicle-mounted equipment sequentially comprises the following components from the front side to the rear side of the frame: the oil-water separator is arranged close to the grinder, the multi-cavity groove type oil-water separator is arranged along the length direction of the frame, the oil sludge cleaning machine and the mud-water mixture dehydrator are arranged on the front side of the frame.

The method comprises the steps of grinding sludge pollutants by a grinder, mixing and stirring the ground sludge pollutants with water in an oil separator, performing oil separation treatment to remove oil components, removing sand from the oil-separated sludge pollutants by an external sand-sand separator, cleaning oil components on the surface of sludge particles of the obtained sludge-water mixture by an oil sludge cleaning machine, dewatering the sludge-water mixture cleaned by the oil sludge cleaning machine by a dewatering machine, and standing and separating oil and water in the oil components of the oil-water mixture removed by the oil separator and the oil sludge cleaning machine by an oil-water separator.

On the basis of the scheme, a stirrer is arranged in parallel with the oil-water separator, and the muddy water mixture after sand removal by the external sand-sand separator is stirred by the stirrer and then is conveyed to the oil sludge cleaning machine.

On the basis of the scheme, more than two oil separators are arranged between the grinding machine and the oil-water separator, and the more than two oil separators work in parallel.

Furthermore, two or more oil separators are provided between the grinder and the oil-water separator, and the two or more oil separators perform oil separation treatment on the oil sludge pollutants twice or more in stages.

Wherein, be provided with the receipts workbin below grinding the machine, grind the machine and be born on the receipts workbin, store the fatlute pollutant after grinding in the receipts workbin temporarily.

Furthermore, a generator set is arranged at the tail of the frame, and the generator set is used for supplying power to all the devices. The mobile oil sludge treatment system is convenient for emergency operation in the field.

Furthermore, a control system is arranged at the tail of the frame, and the control system is used for controlling the work of each device. The centralized operation control can be carried out on the tail part of the frame of the mobile oil sludge treatment system, and the convenience of operation is improved.

Furthermore, a railing panel is arranged on the side of the frame and can be unfolded to form an operation platform.

The utility model has the advantages that: the mobile oil sludge treatment system can complete the whole oil sludge pollutant purification treatment process with minimum system configuration, can perform mobile operation, improves the flexibility of field use, and reduces the cost of oil sludge treatment; the arranged generator set enables the mobile oil sludge treatment system to be suitable for various environments; the system can realize the separation of oil, sand and mud in oil-mud pollutants by combining with an external silt separator, and tests are carried out on the discharged mud, and the test result shows that the oil content of the cleaned mud component which is particularly difficult to purify is 2.5 per thousand, so that the system meets the national discharge standard; the sewage in the treatment process can be recycled, so that water resources are saved, and the production cost is reduced; after the oily sludge is treated by the system, high-quality oil is obtained, and the economic benefit is considerable.

Drawings

FIG. 1 is a block diagram of one embodiment of a grinding mill;

FIG. 2 is a sectional view of the barrel portion of the grinding mill;

FIG. 3 is a front cross-sectional view of one embodiment of a horizontal mixer;

FIG. 4 is a side cross-sectional view of one embodiment of a horizontal mixer;

FIG. 5 is a perspective view of one embodiment of a silt separator;

FIG. 6 is a front view of FIG. 5;

fig. 7 is a perspective structural view of one embodiment of the sludge cleaning machine;

figure 8 is an internal block diagram of one embodiment of the sludge cleaning machine;

FIG. 9 is a perspective view of one embodiment of the oil water separator;

FIG. 10 is an internal structural view of one embodiment of the oil water separator;

FIG. 11 is a process flow diagram of a modular sludge treatment system;

FIG. 12 is a front view of one embodiment of a mobile sludge treatment system;

fig. 13 is a top view of one embodiment of a mobile sludge treatment system.

Description of the symbols:

101. a cylinder body 103, a feeding spiral barrel 104, a discharging spiral barrel 105, a feeding hole 106, a host base 107, a motor 108, a coupling 109, a speed reducer 110, a guiding spiral structure 111, a driving base 112 and a gear cover;

213. u-shaped stirring tank 214, discharge pipe 215, oil collecting tank 216, motor 217 reducer 218, feed inlet 219, main shaft 220, blade support shaft 221, helical blade 2211, internal helical blade 2212, external helical blade 222, driving gear 223, driven gear 224, chain 225, oil scraper 226, steam jet device 227, discharge pipe valve 228, sealing device;

329. the device comprises a bracket 330, a separation tank 331, a sand outlet 332, a waste outlet 333, a muddy water outlet 334, a material throwing end 335, a power device 3351, a motor 3352, a speed reducer 336, a screw shaft 337, a screw blade 338, a liquid level adjusting device 339 and a porous structure;

440. the device comprises a trough body, 4401, a head trough body, 4402, a middle trough body, 4403, a tail trough body, 441, a driving mechanism, 4411, a motor, 4412, a gear reducer, 443, a mechanical stirring device, 4433, an air guide sleeve, 4434, a hole-shaped structure, 445, a liquid level adjusting mechanism, 446, a scraper mechanism, 4461, a scraper shaft, 4462, a scraper blade, 447, an air inlet pipe, 448, an oil receiving box, 449, a feeding box, 450, a discharging box, 451, a box-shaped structure, 452, a feeding port, 453, a flashboard, 454 and a motor;

554. a primary separation tank 555, a secondary separation tank 556, a drain tank 557, a first passage 5571, an inflow port of the first passage 5572, an outflow port of the first passage 558, a recovery unit 559, a second passage 5591, an inflow port of the second passage 5592, an outflow port of the second passage 560, an overflow port 561, an oil storage tank 562, a main overflow port 563, a housing 564, a first partition plate 565, a second partition plate 566, a third partition plate 567, a fourth partition plate 568, a feed pipe 569, a discharge pipe;

1001. a conveying device, 1101, a grinder, 1102, a screening machine, 1103, a first ultrasonic mixer, 1104, a second ultrasonic mixer, 1107, a silt separator, 1108, a sand storage tank, 1109, a mixing tank, 1110, a horizontal centrifuge, 1111, a large sewage tank, 1201, a crusher, 1202, a second horizontal mixer, 1203, a third horizontal mixer, 1204, a chemical supply device, 1205, a disc separator, 1301, a first horizontal mixer, 1302, an oil sludge cleaning machine, 1303, a hot water supply device, 1401 and an oil-water separator;

710. the device comprises a vehicle head, 720, a vehicle frame, 721, the bottom of the vehicle frame, 722, vehicle frame supporting legs, 723, a baffle plate, 731, a control system, 732, a generator set, 741, a grinding machine, 742, a first horizontal mixer, 743, a second horizontal mixer, 744, an oil-water separator, 745, a vertical mixer, 746, an oil sludge cleaning machine, 747, a horizontal centrifuge, 751 and a material collecting box.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

[ TREATMENT TECHNOLOGY ]

In the present embodiment, a detailed description will be given of a specific embodiment of the present invention, taking as an example a complete process for treating contaminated waste generated in oil and gas field production. However, it will be understood by those skilled in the art that the combination of the partial processes in the present treatment process can perform a specific purification treatment on a specific oily waste, and therefore, the whole treatment process described in the present embodiment does not constitute a limitation to the scope of the present invention.

The sludge treatment process of the present embodiment is used for purifying and treating oil-contaminated waste (referred to as "sludge contaminants" for short) generated in oil-gas field production, and includes the following steps:

crushing treatment: the oil sludge pollutant is crushed, a small amount of water can be added for better crushing, and the particle size after crushing reaches below 5 cm.

In addition to the oily silt, the oil sludge pollutants contain large impurities such as waste wood and plastic, which are generated in the production process, and the like, and a large amount of time, manpower and material resources are consumed for the inspection and the selection of the impurities, and the impurities are also polluted by the oil sludge, so that even if the impurities are inspected and treated harmlessly or reused, the impurities are difficult to be recycled. In the present embodiment, such a large volume of waste is crushed in the crushing step, and can be purified in a normalized treatment manner in the subsequent step, thereby obtaining a good effect.

Grinding treatment: after the sludge pollutants are crushed, the sludge pollutants are further ground by a grinding machine, so that the size of the ground sludge pollutant particles is less than 5mm, and the sludge pollutants can be fully contacted with water.

In the present embodiment, depending on the composition of the sludge contaminants, if the waste contains large waste and is tough enough not to be broken into small particles, it is optionally subjected to further fine granulation by a grinding step, so that the purification treatment can be performed in a normalized manner in the subsequent treatment steps. Thereby greatly improving the purification treatment efficiency and reducing the treatment cost.

And (3) sieving treatment: and removing soft waste mixed in the crushed and ground oil sludge pollutants.

The waste of such soft materials is, for example, plastic cloth, felt, clothes, etc., and is not easily broken, and is also hardly broken and fragmented in the grinding step, and causes a certain trouble in the subsequent processing, and therefore, the waste is removed by a sieving step. The soft waste removed in this step is easily treated to be harmless by chemical means, because it is decomposable.

First oil separation treatment: the fatlute pollutant that will sieve adds water and puts into the mixer and carry out abundant stirring, can make the material obtain quick homogeneous mixing in the very short time, makes oil and silt separation and floats on the liquid surface, gets rid of the oil that floats on the liquid surface, and the mixture of discharge silt and water is with the oil that floats on the liquid surface that will get rid of in addition collect the back and carry out centralized processing, can realize the recovery of resource and recycle.

In the first oil separation treatment, the precipitated oil component may be floated by stirring in the inner chamber (lower part) of the apparatus in order to stably mix the finely-divided sludge contaminants with water and float the oil component therein above the liquid surface. Therefore, a stirring device such as a horizontal stirrer can be used as the oil separator. In addition, in order to rapidly precipitate the oil component impregnated in the sludge contaminants, the mixture in the stirrer may be heated while stirring, and an auxiliary agent such as a flocculant or a surfactant may be optionally added.

Moreover, the oil component floating on the upper part of the liquid surface is concentrated and can be easily extracted from the upper part of the liquid surface by a scraper.

And (3) separating and treating silt: and treating the mixture of silt and water by using a silt separator, separating the silt and discharging a mud-water mixture.

After the first oil separation treatment, the oil content remaining in the sludge contaminants is greatly reduced, and particularly, the sand which is the main component in the sludge contaminants only covers the surface of the sand when the oil content pollutes the sand particles due to the particle structure of the sand, and the oil content remaining on the surface of the sand after the first oil separation treatment is quite low due to the large specific surface area of the sand. By separating the sand, the sand component is removed from the sludge contaminants, and the remaining sludge and water mixture can be further purified. And the separated sand is easy to be washed clean by water and can be safely discharged or recycled to be used as building materials and the like.

Second oil separation treatment: and (3) placing the mud-water mixture into a sludge cleaning machine for fully stirring, separating and removing oil components remained in the mud-water mixture, collecting separated oil additionally, performing centralized treatment, and discharging the mud-water mixture.

In the mud-water mixture after the first oil separation treatment, since the mud component particles are fine, the specific surface area is larger than that of sand, and the particle shape is complicated and more oil components are likely to adhere to the particle shape. Therefore, the sludge-water mixture is subjected to targeted purification treatment, oil components attached to the surfaces of sludge particles can be removed and recovered, so that after sludge pollutants are treated, the main components are correspondingly purified, and treated emissions are classified and discharged. In the second oil separation treatment, the slurry-water mixture is further stirred, and if necessary, heated, and an auxiliary agent such as a surfactant and a flocculant is added to precipitate the oil component adhering to the surfaces of the sludge fine particles and float on the upper layer of the liquid surface, whereby a very small amount of the oil component adhering to the surfaces of the sludge fine particles can be removed.

Sludge-water separation treatment: in the sludge-water mixture subjected to the second oil separation treatment, the oil component adhering to the surface of the sludge is completely removed, and therefore, after the sludge-water mixture is dehydrated and water and sludge are discharged, the discharged sludge meets the discharge standard and can be used for firing industrial ceramics and the like, and not only the discharged water can be recycled in the sludge treatment process.

Oil-water separation treatment: the oil components separated in the first and second oil separation treatments contain a large amount of water and cannot be directly recycled. Therefore, in the oil-water separation process, water in the oil components separated in the first and second oil separation processes is separated by a multi-chamber fractional standing method. So as to obtain oil and water, the oil can be recovered and reused, and the water can be circularly used in the above-mentioned treatment process. The apparatus for multi-chamber fractional standing used in the oil-water separation process will be described in detail later.

The water, the mud and the sand separated by the process are tested, and the test result shows that the oil content of the product treated by the process, particularly the mud component, is less than 2.5 per thousand, and the product meets the national emission standard. In conclusion, the process can realize the complete separation of oil, mud and sand in oil sludge pollutants, and realize harmless treatment and resource recycling.

Next, each processing step in the present embodiment and a processing apparatus particularly suitable for use in each step will be described in detail. Aiming at the oil sludge purification treatment process, the existing equipment or the existing equipment is properly improved, so that the aim requirement of treatment in each step can be effectively met, and the equipment cost can be greatly saved.

[ crushing treatment: crusher

In the crushing treatment, a main object is to perform crushing treatment of a large volume of impurities contained in sludge contaminants to reduce the size thereof to a manageable level, and therefore, a general crusher can be used. The crusher may not be used when large volumes of debris in very specific sludge contaminants are very small and can be easily removed.

In the present embodiment, it is preferable to crush other impurities in the sludge contaminants to a size of 5cm, more preferably to a size of 3cm, so that the efficiency of the polishing process can be improved in the subsequent polishing process.

[ grinding treatment: grinder

In the present embodiment, a general ball mill can be used for the grinding treatment. A typical ball mill typically grinds mineral products, which receive ore particles that have been crushed to a specified size. However, in the present invention, the object to be treated is sludge contamination after being crushed, wherein besides silt, large-sized impurities are also present, and even cloth, plastic, felt and the like are difficult to be crushed into small-sized impurities. For this reason, the ball mill is modified in the present embodiment, and the detailed description will be given below.

Fig. 1 and 2 are a structural view and a partial structural view of an embodiment of a grinding machine, respectively.

In the grinding treatment, after the oil sludge pollutants are crushed, the oil sludge pollutants are further ground by a grinding machine, as shown in fig. 1 and fig. 2, a cylinder 101 is fixed on a main machine base 106, a large gear is arranged at the end part of one end of the outer wall of the cylinder 101, a feeding spiral barrel 103 and a discharging spiral barrel 104 are respectively arranged on the circular bottom surfaces of two ends of the cylinder 101, and guiding spiral structures 110 formed by reinforcing steel bars are arranged on the inner wall surfaces of the feeding spiral barrel 103 and the discharging spiral barrel 104; the spiral structure 110 for guiding is used for welding the reinforcing steel bars on the inner wall surface of the spiral barrel in a spiral structure through a seamless welding technology, and because oil sludge pollutants are sticky sludge-shaped substances and possibly cloth, plastics, linoleum and other impurities which are not easy to be broken into small-sized impurities are easy to wind and block in the rotating process, the rod-shaped structure of the reinforcing steel bars can realize the small contact area of the oil sludge pollutants and the spiral structure, and the blockage of the oil sludge pollutants on the spiral barrel is reduced; the guiding spiral structure 110 in the feeding spiral barrel 103 can guide oil sludge pollutants into the barrel 101, and the guiding spiral structure 110 in the discharging spiral barrel 104 can guide the ground oil sludge pollutants to leave the barrel; the feeding spiral barrel 103 is connected with the feeding hole 105, the feeding hole 105 is in a funnel shape, the upper opening of the funnel is upward, and the lower part of the funnel is connected with the feeding spiral barrel 103 in a downward inclined mode, so that oil sludge pollutants can be conveniently fed;

the driving device for driving the grinding mill to work comprises a motor 107, a coupler 108, a speed reducer 109 and a pinion, wherein the motor 107 is connected with the speed reducer 109 through the coupler 108, the speed reducer 109 is connected with the pinion through the coupler 108, the pinion is meshed with a large gear of the barrel 101, so that the barrel 101 is driven to rotate by the motor 107, and all the driving devices are fixed on a driving base 111.

Gear cover 112 is equipped with to gear wheel and pinion outside, and gear cover 112 wraps up gear wheel and pinion inside it, and the effectual fatlute pollutant that stops volatilizing in the grinding process and the dust in the air adsorb on the gear, guarantees the normal operating and the life of gear.

The grinding balls are arranged inside the cylinder body 101, and are driven to roll and collide in the cylinder body 101 through rotation of the cylinder body 101, so that oil sludge pollutants are ground to a required size.

Further, a liner is provided inside the cylinder 101. Grinding ball and material can direct and the welt contact when rolling, can not cause the damage to staving 101 inner wall, play wear-resisting shock-resistant effect.

The method comprises the following steps in the oil sludge treatment process:

firstly, the motor 107 of the driving device starts to work, and the driving device drives the grinding machine to work;

the crushed oil sludge pollutants are added into a funnel-shaped feed port 105, the lower part of the funnel is connected with a feed spiral barrel 103 in an obliquely downward mode, so the crushed oil sludge pollutants can easily enter the feed spiral barrel 103, and a spiral structure 110 for guiding the feed spiral barrel 103 guides the crushed oil sludge pollutants into the barrel 101 during rotation;

with the rotation of the cylinder body 101, the grinding balls are driven to roll and collide in the cylinder body 101, so that the oil sludge pollutants are ground to the required size;

after the material particle size reached the grinding requirement, the oily sludge pollutant that grinds in the barrel 101 reached ejection of compact spiral barrel 104 department, along with ejection of compact spiral barrel 104's rotation, discharged from ejection of compact spiral barrel 104 by the guide of helical structure 110 guide in the ejection of compact spiral barrel 104, and the oily sludge pollutant that the exhaust was ground can be used for further processing.

The beneficial effect of this machine that grinds: the unique spiral opening design can guide oil sludge pollutants into the cylinder body and guide ground oil sludge pollutants out of the cylinder body, and simultaneously can reduce the blockage of the oil sludge pollutants on the spiral barrel; set up the normal operating that the gear cover can protect the gear well in the fatlute environment, set up the intensity that the barrel then can be consolidated to the welt, reduce the wearing and tearing of machine of grinding, greatly reduced the frequency of later stage maintenance.

[ sieving treatment: sifting machines

As described above, as for sludge pollutants generated in oilfield production, due to the complex composition, plastic cloth, linoleum, cloth, etc. are likely to be mixed and can not be crushed or ground into small-sized impurities, the ground sludge pollutants are screened by a screening machine as required, and impurities which are not suitable for being doped in subsequent treatment are screened out. These impurities can become problematic for subsequent disposal and, although part of the impurities is also an oil-containing contaminant relative to the total amount of sludge contaminants, they are contained in a relatively low amount and are easily rendered harmless by another chemical route.

(first oil separation treatment: horizontal mixer

The sludge pollutants after sieving are all small-size particles, for example, all below 5 mm. In the first oil separation treatment, the oil component can be separated by adding water and sufficiently stirring the mixture in a stirrer, and the stirrer may have any stirrer configuration.

Fig. 3 and 4 are a front sectional view and a side sectional view of the horizontal mixer according to the present embodiment, respectively. As shown in fig. 3 and 4, the horizontal mixer used in the present embodiment includes: the bottom of the U-shaped stirring tank 213 is of an arc structure, so that the minimum gap between the helical blade 221 and the U-shaped stirring tank 213 is reduced, and the purpose of full stirring is achieved; a discharge pipeline 214 is arranged at the bottom of the U-shaped stirring tank 213, and a discharge pipeline valve 227 is arranged on the discharge pipeline 214 and used for controlling the discharge pipeline 214 to discharge a mixture of the residual silt and water after the oil is separated; the two sides of the U-shaped stirring tank 213 are respectively provided with a steam injection device 226 which is obliquely downward, and steam enters the bottom of the U-shaped stirring tank 213 in the obliquely downward direction, so that the purpose of rapid and sufficient heating can be achieved, and gaps in liquid can be increased to enable oil in oil sludge pollutants to quickly float on the liquid surface; the upper part of one end of the U-shaped stirring tank 213 is provided with a feed inlet 218, the other end is connected with an oil collecting tank 215, and the bottom of the oil collecting tank 215 is inclined, so that oil in the oil collecting tank 215 can completely flow out from the oil collecting tank 215.

The power device comprises a motor 216, a speed reducer 217 and a coupler, wherein the motor 216 is connected with the speed reducer 217 through the coupler; the rotational speed of the power plant is adjustable.

The stirrer receives the drive selection of a power device through a coupler and comprises a main shaft 219, a blade support shaft 220 and a helical blade 221, wherein the main shaft 219 horizontally traverses two ends of the U-shaped stirring tank 213 and is connected with a speed reducer 217 of the power device through the coupler, and a sealing device 228 is arranged at the joint of the main shaft 219 and the U-shaped stirring tank 213 to prevent liquid leakage inside the U-shaped tank 213; the helical blade 221 comprises an inner helical blade 2211 and an outer helical blade 2212, the inner helical blade 2211 pushes the material to two sides from the middle, the outer helical blade 2212 pushes the material to the middle from two sides, the oil sludge pollutants and water are fully stirred, and the oil remained in the oil sludge pollutants is fully released and floats on the liquid level.

The oil scraping device is positioned inside the U-shaped stirring tank 213 and above the stirring system, and comprises a driving gear 222 and a driven gear 223 which are chain transmission structures and a chain 224 sleeved on the driving gear 222 and the driven gear 223, wherein the driving gear 222 and the driven gear 223 are positioned at a specified liquid level height position in the stirring tank 213. The driving gear 222 and the driven gear 223 are the same in size, and the chain transmission structure is horizontally arranged in the U-shaped stirring tank 213 and is parallel to the liquid level in the U-shaped tank; the driving gear 222 and the driven gear 223 are horizontally disposed to drive the chain 224 to rotate, so that the chain on the lower side of the chain 224 moves toward the edge of the U-shaped agitation tank 213.

A plurality of scraper plates 225 are provided at predetermined intervals on the chain 224, and the scraper plates 225 push the oil components floating on the liquid surface at a predetermined height above the liquid surface toward the edge of the U-shaped stirring tank 213 by being driven by the chain 224 and collect the oil components from the oil receiving tank 215 provided outside the U-shaped stirring tank 213. The rotation speed of the driving gear 222 is adjustable, so that the oil scraping device can adjust the oil scraping speed of the oil scraping plate 225 according to the thickness of the oil layer on the liquid surface.

In the present embodiment, the mixture of sludge contaminants and water is fed into the U-shaped stirring tank 213 through the feed port 218 provided at one end in the axial direction of the U-shaped stirring tank 213, and the stirring system is driven to rotate by the motor 216, and at this time, the helical blade 221 of the stirring system sufficiently stirs the mixture of sludge contaminants and water, thereby sufficiently eluting the oil contained in the sludge contaminants into the liquid.

Moreover, the oil scraper is disposed at the other axial end of the U-shaped stirring tank 213, so that the operation of the oil scraper is prevented from being affected by the operation of the feed port 218.

In this embodiment, the horizontal mixer further comprises a steam injection device 226 for introducing hot steam, wherein the steam enters the bottom of the U-shaped stirring tank 213 in an obliquely downward direction and then rises upward by the reaction force of the bottom of the U-shaped stirring tank 213, so as to achieve the purpose of rapid and sufficient heating, and increase the gap inside the liquid to allow the oil in the sludge contaminants to quickly float on the liquid surface.

When the oil layer on the upper layer in the U-shaped stirring tank 213 reaches a certain thickness, the oil scraping device is started, the rotating speed of the power device is adjusted to a proper gear, the motor 216 of the power device drives the chain transmission structure to rotate on the upper part of the U-shaped stirring tank 213, so that the oil scraping plate 225 on the chain 224 is driven to move towards the oil collecting tank 215, and oil floating on the liquid level in the U-shaped stirring tank 213 is scraped into the oil collecting tank 215.

When all the oil floating on the liquid surface in the U-shaped stirring tank 213 is scraped into the oil receiving tank 215, the discharge pipe valve 227 is opened, and the remaining sludge mixture after the oil separation in the U-shaped stirring tank 213 is discharged through the discharge pipe 214 to be further processed.

The invention has the beneficial effects that: the structure of the U-shaped stirring tank and the structure of the double helical blades are adopted, so that the materials are in more sufficient contact with the barrel wall, and the purpose of full stirring is achieved; obliquely downwards

The steam injection device can not only achieve the purpose of rapid and sufficient heating, but also increase the gap in the liquid to enable the oil in the oil sludge pollutants to quickly float on the liquid surface; the arrangement of the oil scraping device and the oil collecting tank realizes the separation and recycling of oil in oil sludge pollutants.

In the first oil separation treatment, the sludge contaminants may be separated a plurality of times in order to improve the treatment efficiency. For example, after the sludge contaminants are treated by the horizontal mixer of the present embodiment, the discharged sludge contaminants with the oil components cleaned are again introduced into the next-stage horizontal mixer and cleaned again. This can greatly reduce the oil content in the sludge contaminants, and particularly, can sufficiently remove the oil content on the surface of the sand.

[ ultrasonic cleaning: ultrasonic wave mixer

The oil sludge contaminant cleaned by the horizontal mixer of the present embodiment has a very small residual amount of oil on the sand surface. The sludge contaminants may be cleaned using an ultrasonic cleaner as needed. The oil component on the sand surface can be removed more effectively by using ultrasonic waves. In addition, in the ultrasonic cleaning process, the ultrasonic generator can be arranged in the horizontal mixer of the embodiment, especially in the cleaning of a multi-stage horizontal mixer, the ultrasonic generator can be arranged in the horizontal mixer at the rear stage, so that the oil component on the surface of the sand can be thoroughly removed by matching with the cleaning of the horizontal mixer. In addition, a separate ultrasonic stirrer can be arranged to treat the oil sludge pollutants.

[ silt separation treatment: sand separator

After the first oil separation treatment, the oil components attached to the sand surface of the oil sludge pollutants are sufficiently removed, so that an oil sludge mixture containing mud, sand and water and having a low oil content can be treated by using the sand-mud separator of the embodiment, the sand is separated, and the mud-water mixture is discharged; the silt separator used is shown in fig. 5 and 6, and comprises: a bracket 329 including a plurality of supporting parts having different heights, so that a frame for fixing the tank body at an inclined angle is provided at an upper portion; a power unit 335 including a motor 3351, a speed reducer 3352, and a coupling, the motor 3351 being connected to the speed reducer 3352 through the coupling; a separation groove 330, the separation groove 330 being fixed to the frame of the bracket 329 at an inclination angle of high front to low rear; the spiral separating device comprises a spiral shaft 336 and spiral blades 337, wherein the spiral blades 337 are spirally wound on the spiral shaft 336, the spiral shaft 336 and the spiral blades 337 are integrally formed, the joint is smooth and seamless, and the blockage and damage of separated materials to the inside of the spiral separating device are avoided.

The spiral separating device is arranged in the separating groove 330, the lower part of the section of the separating groove 330 is of an arc structure, and the spiral blade 337 of the spiral separating device is sleeved with the arc structure of the separating groove 330; the tail part of a spiral shaft 337 of the spiral separation device reaches the tail end of the separation groove 330, and the head part of the spiral shaft 337 penetrates through the front end of the separation groove 330 and is connected with a speed reducer in the power device 335 through a coupler, so that the power device 335 drives the spiral separation device.

The bottom of the front end of the separation tank 330 near the end is provided with a sand outlet 331 for discharging separated sand; the rear end of the separation groove is of a bucket-shaped structure, so that separated materials can be conveniently added and contained, and the opening at the upper part of the bucket-shaped structure is a material throwing end 334, so that the materials to be separated can be thrown in the opening; a waste material discharge port 332 is formed in the lower end of the tail of the bucket-shaped structure and can be used for thoroughly discharging materials in the separation tank when equipment is cleaned; a muddy water outlet 333 is formed in the upper end of the tail part of the bucket-shaped structure and used for discharging muddy water after sand separation; the muddy water discharge port 333 is connected with a liquid level adjusting device 338, the liquid level adjusting device 338 has a box-type structure with a shutter for adjusting the liquid level, and the height of the liquid level in the separation tank 330 can be adjusted by adjusting the height of the shutter; the design of the internal and external liquid level difference of the box structure can ensure that muddy water flows out of the muddy water discharge port under the action of gravity, a filter screen can be additionally arranged at the muddy water discharge port 333 to play a role of blocking sand in the separation tank, and the existence of the filter screen and the box structure of the liquid level adjusting device can ensure that muddy water without sand is discharged from the muddy water discharge port 333.

The section of the spiral blade 337 near the rear end of the separation tank 330 is provided with a hole structure 339 for filtering mud and water, a mixture of silt and water is thrown from the material throwing end 334, the spiral blade 337 with the hole structure conveys sand to the front end of the separation tank 330 and discharges the sand from the sand discharge port 331 as the spiral blade 337 rotates, and the remaining mud and water flows to the rear end of the separation tank 330 through the hole structure 339 due to gravity.

The spiral separating device brings sand in a mixture of silt and water to the sand outlet through the spiral blades, separation of the sand, the silt and the water is achieved, operation is simple, separating speed is high, and separating efficiency is greatly improved.

(second oil separation treatment: sludge washer

After the silt separation treatment, most of oil components are removed from oil sludge pollutants, and sand is separated from a mixture of mud and water to obtain a mud-water mixture. As described above, a small amount of oil may remain attached to the surface of the sludge particles in the sludge-water mixture and cannot be directly discharged or used, and therefore, in the present embodiment, the oil components attached to the surface of the sludge particles are removed in the second oil separation process using the sludge cleaning machine. Placing the mud-water mixture in an oil sludge cleaning machine for fully stirring, separating and removing oil remained in the mud-water mixture, collecting the separated oil additionally, performing centralized treatment, and discharging the mud-water mixture; the sludge cleaning machine used is shown in fig. 7 and 8.

The oil sludge cleaning machine comprises a tank body 440, wherein the tank body 440 consists of a head tank body 4401, two middle tank bodies 4402 and a tail tank body 4403, the head tank body 4401 is provided with a feeding box 449, the tail tank body 4403 is provided with a discharging box 450, and the tank bodies are connected through a box-type structure 451; a feeding port 452 is formed in the bottom of the trough body 440 at one end of the discharging box 450 and one end of the box-type structure 451, a flashboard 453 for adjusting liquid level is arranged at the other end of the discharging box, a plurality of air inlet pipes 447 which enter the trough body 440 in an obliquely downward direction are arranged at the rear part of the trough body 440, and a rectangular oil collecting box 448 is arranged at the front part of the trough body 440; the driving mechanism 441 comprises a motor 4411 and a gear speed reducer 4412, the motor is connected with the gear speed reducer 4412 through a coupler, and the motor 4411 and the gear speed reducer 4412 are fixed on the upper part of the groove body 440; the mechanical stirring device 443 is arranged inside the tank body 440, the mechanical stirring device 443 comprises a stirring shaft vertically arranged in the tank body along the axial direction and an impeller arranged at the lower part of the stirring shaft, the upper end of the stirring shaft receives the power of the driving mechanism 441, and the rotation of the motor 4411 is transmitted to the stirring device 443 through the gear reducer 4412. In the invention, the muddy water mixture is cleaned, so that a person still contains a certain amount of oil in the muddy water mixture, so that the scattering of a trace amount of oil component does not have any influence on the gear transmission mechanism, and the scattered oil component can cause the belt transmission mechanism to slip after the belt transmission mechanism is used for a long time. The squeegee mechanism 446 is provided at the edge of the tank body 440, and includes a squeegee shaft 4461 and a plurality of squeegee blades 4462 rotating about the squeegee shaft 4461, and the squeegee shaft 4461 is rotated about the squeegee shaft 4461 by the driving of the motor 454. The height of the squeegee shaft is set so that when the squeegee blade 4462 rotates to reach the lowest height in the tank 440, the squeegee blade 4462 can touch the liquid surface, and a small amount of oil component floating above the liquid surface is dipped on the surface of the squeegee blade 4462, and by continuing the rotation of the squeegee blade 4462, the dipped oil component can be dropped into the oil receiving tank 448. .

The groove body 440 is formed into a plurality of long stirring shafts, and the driving mechanism 441 and the scraping mechanism 446 are arranged in parallel along the length direction of the groove body 440. And the squeegee blades 4462 coaxially rotate with the squeegee shaft.

The mud-water mixture is firstly injected into the head tank 4401 from the feeding box 449 of the head tank 4401, and the impeller of the mechanical stirring device 443 in the head tank 4401 fully stirs the mud-water; meanwhile, hot steam is introduced into the air inlet pipe 447, and because the air inlet pipe 447 is set in the obliquely downward direction in the trough body 440, the introduced steam penetrates through the mud-water mixture in the obliquely downward direction and flushes into the bottom of the trough body 440, and then rises in the opposite direction through the reaction force at the bottom of the long trough body 440 to be in full contact with the mud-water mixture in the trough body 440, so that oil in the mud-water mixture is brought to the liquid surface; and the mud-water mixture at the bottom of the tank body enters the feeding port 452 of the box-type structure 451.

When the muddy water mixture injected into the head tank 4401 exceeds the height of the gate 453 of the box structure 451, it flows into one of the intermediate tanks 4402 adjacent to the head tank 4401 through the box structure 451, and the operations such as the head tank are repeated: the impeller of the mechanical stirring device fully stirs the muddy water; meanwhile, hot steam is introduced into the air inlet pipe 447, and because the air inlet pipe 447 is set in the obliquely downward direction in the tank body 440, the introduced steam penetrates through the mud-water mixture in the obliquely downward direction and flushes into the bottom of the tank body 440, and then rises in the opposite direction through the reaction force at the bottom of the tank body 440 to be in full contact with the mud-water mixture in the tank body 440, so that oil in the mud-water mixture is brought to the liquid surface; and the mud-water mixture at the bottom of the trough body 440 enters the feed inlet 452 of the box-type structure 451.

The head tank 4401 is continuously filled with the mud-water mixture, the mud-water mixture sequentially passes through the head tank 4401, the middle tank 4402 and the tail tank 4403, and the operation like the head tank is repeatedly carried out in each tank: the impeller of the mechanical stirring device fully stirs the muddy water; meanwhile, hot steam is introduced into the air inlet pipe 447, and because the air inlet pipe 447 is set in the obliquely downward direction in the tank body 440, the introduced steam penetrates through the mud-water mixture in the obliquely downward direction and flushes into the bottom of the tank body 440, and then rises in the opposite direction through the reaction force at the bottom of the tank body 440 to be in full contact with the mud-water mixture in the tank body 440, so that oil in the mud-water mixture is brought to the liquid surface; the mud-water mixture at the bottom of the tank body is discharged out of the tank body through the discharge box 450;

the liquid level in the tank can be adjusted by adjusting the height of the gate 453 by the liquid level adjusting mechanism 445.

The scraper mechanism 446 positioned at the upper part of the groove body 440 is driven by the motor 4411 to rotate continuously, and the scraper blade 4462 is adjusted to a proper height, so that oil floating on the upper layer in the groove body 440 can be scraped into the oil collecting tank 448.

In the oil sludge cleaning machine, muddy water with oil sludge sequentially enters the head tank body, the middle tank body and the tail tank body to be cleaned, enough cleaning times are ensured, and finally, after a muddy water mixture flowing out of the tail tank body is dewatered, water and mud are discharged.

In the present invention, since the sludge-water mixture is treated and the oil component separated by washing from the surface of the sludge particles is recovered by the scraper mechanism, a metal material such as stainless steel, copper, or aluminum, or an alloy material of a plurality of metals is used as the treatment target. The scraper blade has good stability of the installation structure, and the service life of the scraper blade is greatly prolonged.

[ mud-water separation treatment ]

After the sludge washing treatment, the oil component adhering to the surface of the sludge particles in the sludge-water mixture is sufficiently removed, and the sludge and the water can be separated by the sludge-water separation treatment. In the mud-water separation treatment, mud may be dehydrated by using a centrifugal separator to obtain mud and water.

The discharged water can be recycled in the sludge pollutant treatment process of the embodiment, so that the water consumption in the treatment is reduced. And the test result shows that for the mud component which is particularly difficult to purify, the oil content after cleaning is 2.5 per thousand, which meets the national emission standard, and can be safely discharged or recycled for producing industrial ceramics and the like.

[ oil-water separation treatment: oil-water separator

The oil components separated in the first and second oil separation treatments contain a large amount of water and cannot be directly recycled. Therefore, in the oil-water separation treatment, the oil separated in the first and second oil separation treatments is treated by an oil-water separator, the oil and the water in the oil-water separation treatment are further separated, the oil can be recycled, and the water can be recycled in the process; the oil-water separator used is shown in fig. 9 and 10:

the separator has a case 563 having an upper portion opened, a first partition 564 surrounding a primary separation groove 554 with a wall surface of the case 563 from a front end to a rear end, a second partition 565 provided at a distance from the first partition 564, a third partition 566 surrounding a secondary separation groove 555 together with the second partition 565 and the wall surface of the case 563 on an opposite side of the second partition 565 to the first partition 564, and a fourth partition 567 surrounding a drain groove 556 with the wall surface of the case 563 on an opposite side of the third partition 566 from the second partition 565 at a distance from the third partition 566, are sequentially provided in the case 563;

a feed pipe 568 is arranged at the bottom of the primary separation groove 554, and a discharge pipe 569 is arranged at the bottom of the drainage groove 556;

a first passage 557 for introducing liquid from the primary separation tank 554 to the secondary separation tank 555 is provided between the primary separation tank 554 and the secondary separation tank 555, an inflow port 5571 of the first passage is provided at the bottom of the primary separation tank 554, and an outflow port 5572 of the first passage is higher than the inflow port 5571 of the first passage; the first passage 557 is formed by a first partition plate 564 and a second partition plate 565, the lower end of the first partition plate 564 has a gap with the bottom surface of the case 563, the gap is an inflow port 5571 of the first passage, the height of the second partition plate 565 is lower than that of the first partition plate 564, and when the liquid in the primary separating groove 554 is higher than that of the second partition plate 565, the liquid flows into the secondary separating groove 555 through the second partition plate, so that an outflow port 5572 of the first passage is formed at the upper end of the second partition plate 565; the first passage 557 is set to stabilize the speed of introducing the liquid from the primary separation tank 554 to the secondary separation tank 555 and to fix the inflow direction, so that the oil-water mixed liquid flowing into the secondary separation tank 555 can separate oil upwards and water downwards, and a better standing effect is achieved;

a recoverer 558 is arranged at the upper part of the secondary separation tank 555, the recoverer 558 is a strip-shaped groove with an open upper part, the overflow port 560 is a plurality of sawtooth-shaped notches arranged at the upper edge of the recoverer 558, and when the liquid level in the secondary separation tank 555 exceeds the height of the overflow port 560 of the recoverer 558, oil on the upper layer of the standing layered oil-water flows into the recoverer 558 through the overflow port 560 to realize oil separation; an oil storage tank 561 for storing the oil recovered by the recoverer 558 is arranged in the secondary separation tank 555, the strip-shaped groove is led to the oil storage tank 561, and the oil reaching the recoverer 558 through the overflow port 560 flows into the oil storage tank 561 to realize the recovery of the oil;

a plurality of recoverers 558 are arranged in the secondary separation tank 555, and the oil separation and recovery efficiency can be improved through the plurality of recoverers 558;

a second passage 559 for introducing liquid from the secondary separation tank 555 to the drain tank 556 is arranged between the secondary separation tank 555 and the drain tank 556, an inflow port 5591 of the second passage is arranged at the bottom of the secondary separation tank, so that water in the standing layered oil-water bottom layer is discharged into the drain tank, and an outflow port 5592 of the second passage is higher than the overflow port 560; the second passage is formed by a third clapboard 566 and a fourth clapboard 567, a gap is arranged between the lower end of the third clapboard 566 and the bottom surface of the shell 563, the gap is an inflow port 5591 of the second passage, the height of the fourth clapboard 567 is higher than the overflow port 560, when the liquid level in the secondary separation tank 555 is higher than the fourth clapboard 567, the water of the oil-water bottom layer which is layered and stands in the secondary separation tank 555 flows into the drainage tank 556, the oil of the oil-water upper layer which is layered and stands in the secondary separation tank 555 flows into the recoverer 558 through the overflow port 560, and the outflow port 5592 of the second passage is formed at the upper end of the fourth clapboard 567; the design of the second passage 559 enables the liquid level of the secondary separation tank 555 to be higher than the overflow port 560, so that the oil on the upper layer of the standing layered oil-water can reach the recoverer 558 through the overflow port 560, and the water on the lower layer of the standing layered oil-water can enter the drainage tank 556 from the bottom, so that the oil-water is thoroughly separated;

a main overflow port 562 that overflows the secondary separation tank 555 is provided in the upper portion of the primary separation tank 554, the main overflow port 562 is located above the first partition 564, and the height of the main overflow port 562 is higher than the overflow port 560, so that the oil in the upper layer of the standing and layered oil-water overflows the secondary separation tank 555 when the liquid level in the primary separation tank 554 exceeds the main overflow port 562, and overflows into the recovery device 558 in the secondary separation tank 555, and is separated and recovered.

Utilize the utility model discloses carry out oil-water separation's best implementation method's operation process to oil-water mixture as follows:

continuously introducing the oil-water mixed liquid into the primary separation tank 554 through a feed pipe 568 in a discontinuous manner;

when the liquid level in the primary separation tank 554 is higher than the outflow port 5572 of the first passage, the oil-water mixture in the primary separation tank 554 flows into the secondary separation tank 555 through the first passage 557, and since the density of water is higher than the density of oil and the water and the oil are incompatible, the oil-water mixture in the primary separation tank 554 and the secondary separation tank 555 is layered when standing, the oil with low density automatically floats up, and the water with high density remains at the bottom;

when the liquid level in the primary separation tank 554 is higher than the main overflow port 562, because the height of the main overflow port 562 is higher than the height of the overflow port 560, the oil in the upper layer of the oil-water layer in the primary separation tank 554 overflows into the secondary separation tank 555 through the main overflow port 562, and the oil-water mixed liquid in the primary separation tank 554 continuously flows into the secondary separation tank 555 through the first passage 557; meanwhile, oil on the upper layer of the layered oil-water in the secondary separation tank 555 overflows into the recoverer 558 through the overflow port 560, the recoverer 558 leads to the oil storage tank 561, and the oil reaching the recoverer 558 through the overflow port 560 flows into the oil storage tank 561 to realize the separation and recovery of the oil;

when the liquid level in the secondary separation tank 555 is higher than the outlet 5592 of the second passage, the water in the layered oil-water lower layer in the secondary separation tank 555 flows into the drainage tank 556 through the second passage 559, the drainage tank 556 is provided with a discharge opening 569, and the water in the drainage tank 556 can be discharged through the discharge opening 569 and recycled in the sludge treatment process; meanwhile, oil in the upper layer of the layered oil-water in the secondary separation tank 555 overflows into the recoverer 558 through the overflow port 560, the recoverer 558 leads to the oil storage tank 561, and the oil reaching the recoverer 558 through the overflow port 560 flows into the oil storage tank 561 to realize the separation and recovery of the oil.

The utility model has the advantages that: the outlet of the first passage is higher than the inlet of the first passage, so that the speed of leading liquid into the secondary separation tank from the primary separation tank is stable, the inflow direction of the liquid is fixed, the oil-water mixed liquid flowing into the secondary separation tank is separated from the oil upwards and the water downwards, and a better standing effect is achieved; the inflow port of the second passage is arranged at the bottom of the secondary separation tank, so that water at the bottom layer of the standing layered oil-water is discharged into the drainage tank from the bottom layer, and the outflow port of the second passage is higher than the overflow port, so that the liquid level of the secondary separation tank can be higher than the overflow port, and the oil at the upper layer of the standing layered oil-water reaches the recoverer through the overflow port, thereby realizing the thorough separation of oil and water; the primary separation tank and the secondary separation tank simultaneously stand and layer oil and water, so that the oil-water separation efficiency is accelerated.

The oil, sand and mud in the oil sludge pollutants are separated from the product treated by the process, and the discharged mud is tested, and the test result shows that the oil content of the cleaned mud component which is particularly difficult to purify is 2.5 per thousand, so that the oil content meets the national emission standard; the sewage in the treatment process can be recycled, so that water resources are saved, and the production cost is reduced; after the oily sludge is treated by the system, high-quality oil is obtained, and the economic benefit is considerable; the process can realize the complete separation of oil, mud and sand in the oil sludge pollutants, and realizes the harmless treatment of the oil sludge pollutants and the recycling of resources.

Example 1

The sludge treatment process of the present embodiment is a modular sludge treatment system for purifying sludge pollutants generated in oil and gas field production, and the modular sludge treatment system will be described in detail below.

The modular sludge treatment system adopts a modular structure, and the modular structure enables the sludge treatment system to be a three-layer building structure. Figure 11 is a schematic diagram of a modular sludge treatment system building configuration. As shown in fig. 11, the building body is a cast-in-place hollow building body, which comprises a lower layer, a middle layer and an upper layer, so that the construction is simple, rapid, environment-friendly and energy-saving. The three floors are respectively provided with devices for carrying out the specific steps of the sludge treatment process.

In the lower layer, as a main processing apparatus, a grinder 1101 is provided; two ultrasonic mixers 1103 and 1104 for ultrasonically cleaning the sludge contaminants after the first oil separation treatment; the silt separator 1107 described above for carrying out silt separation processing, and the horizontal centrifuge 1110 for dehydrating a muddy water mixture. In addition, auxiliary containers and equipment such as a screening machine 1102, a sewage tank 1111, a stirring barrel 1109, a sand storage pool 1108 and the like are also arranged.

In the middle layer, as a main processing device, a crusher 1201 is provided; two horizontal agitators 1202 and 1203 for performing the secondary first oil separation process in the first oil separation process, and a disc separator 1205 for performing the primary separation of water in the muddy water mixture. In addition, auxiliary equipment such as a medicine feeder 1204 is provided.

In the upper stage, as main treatment facilities, a horizontal mixer 1301 for performing the first-stage first oil separation as the first oil separation treatment and the sludge washing machine 1302 are provided. In addition, a hot water supply device 1303 is provided.

In the present embodiment, a two-stage treatment method is adopted as the first oil separation treatment, and after the first oil separation treatment, the oil sludge contaminants are washed in parallel by the ultrasonic mixers 1103 and 1104 to remove oil components on the sand surface. In addition, in the mud-water separation treatment, a two-stage treatment method is also adopted, specifically, after the second oil separation treatment is performed by the sludge washing machine 1302, part of water in the mud-water mixture is discharged by the disc separator 1205, and then the concentrated mud-water mixture is dehydrated by the horizontal centrifuge 1110, so that the treatment efficiency is greatly improved.

The sludge contamination treatment system using the modular building construction according to the present embodiment will be described in detail with reference to fig. 11.

First, sludge contaminants to be treated are accumulated outside the building, and at this time, the accumulated sludge contaminants outside the building are transferred to a hopper of a crusher 1201 provided at a middle floor close to the building wall and extending outside the wall by a transfer device 1001 such as a forklift or a conveyor, thereby realizing the feeding.

The sludge contaminants are then crushed by crusher 1201. The sludge contaminants after the crushing treatment are discharged to the lower layer from the discharge port of the crusher 1201. The feed opening of the mill 1101 arranged at the lower layer can be arranged corresponding to the discharge opening of the crusher 1201, so that the space occupied by the processing system and the equipment cost for conveying materials can be greatly saved.

Next, in the lower layer, the sludge contaminants are ground by the grinder 1101, and the ground sludge contaminants are sent to the sifter 1102 to be screened and temporarily stored in the collection box of the sifter 1102.

The first-stage oil separation process is performed by conveying the sludge contaminants crushed in the collection tank (the sifter 1102) to the first horizontal mixer 1301 provided in the upper stage by a conveyor such as a conveyor belt.

Then, the sludge contaminants subjected to the primary first oil separation treatment are sent to the second and third horizontal agitators 1202 and 1203 provided in the middle stage, respectively, and the secondary first oil separation treatment is performed in parallel by the two horizontal agitators 1202 and 1203. When the secondary first oil separation process is performed, the chemical supply device 1204 is used to add a flocculant and/or a surfactant to the second and third horizontal mixers 1202 and 1203, respectively.

Most of the oil components in the sludge contaminants after the primary and secondary first oil separation treatments are removed, and then the oil components are transferred to the first and second ultrasonic agitators 1103 and 1104 provided in the lower stage, respectively, and ultrasonic treatment is performed while agitating the oil components, thereby removing the residual oil components adhering to the surface of the sand.

At this time, the oil component in the sludge contaminant, particularly the oil component on the sand surface therein, is sufficiently removed, and the sand component is removed by the sand separator 1107 provided at the lower layer to discharge the muddy water mixture. The removed sand may be stored in a sand storage pool 1108. A stirring tank 1109 is provided in the lower stage, and the slurry mixture discharged from the silt separator 1107 is stirred by the stirring tank 1109, thereby preventing the slurry components from being deposited and agglomerated.

The muddy water mixture discharged from the mixer 1109 is transferred to the sludge washer 1302 provided in the upper layer by a pump not shown, and hot water is further added by the hot water supply device 1303, so that the water content of the muddy water mixture is increased. This enables more effective removal of oil components adhering to the surface of the sludge particles, enabling them to meet emission standards.

The slurry mixture washed by the sludge washer 1302, in particular, the oil components adhered to the surface of the sludge particles are sufficiently cleaned, and the slurry mixture is transferred to the disk separator 1205 provided in the middle layer, and most of the water in the slurry mixture is discharged and concentrated.

The slurry-water mixture concentrated by the disk separator 1205 is discharged to the lower stage, and is sent to the horizontal centrifuge 1110, where the slurry-water mixture is dewatered to obtain sludge as one of the final discharges. In addition, in this embodiment, the slurry-water mixture is dehydrated by two dehydration steps, i.e., the disc separator 1205 and the horizontal centrifuge 1110, so that the efficiency of separating the slurry and the water is greatly improved. The discharged water is stored in the sewage tank 1111, and the water in the sewage tank 1111 can be treated by standing still and adding a reagent or the like to obtain water usable for the purification treatment of the present sludge contaminants, and the water is sent to the hot water supply device 1303 by a pump not shown in the figure, so that the water can be recycled, and the water saving effect of the purification treatment can be greatly improved.

In the present embodiment, the oil-water separator 1401 is installed outside the floor structure of the modular floor sludge treatment system, but may be installed at a lower level of the floor structure as the case may be. The oil-water mixture separated by the first, second, and third horizontal agitators 1301, 1202, and 1203 and the sludge washer 1302 is injected into the oil-water separator 1401, thereby achieving oil-water separation.

As described above, in the present embodiment, the sludge contamination purification system is constructed in a modular building structure, so that the system can occupy a smaller floor space and can be easily constructed. In addition, by arranging the designated processing equipment in each layer, the energy consumed for conveying the materials during the whole process treatment can be reduced to the maximum extent. The treatment system has the advantages of compact structure, high treatment efficiency, minimum pollution and low power consumption.

Example 2

The sludge treatment process according to the present invention may be configured not only as the sludge treatment system described in the above example 1, but also as a mobile sludge treatment system as needed. The mobile oil sludge treatment system is characterized in that different devices for oil sludge treatment are respectively arranged on a mobile vehicle-mounted chassis and are towed to any occasion needing emergency treatment of oil sludge pollutants for flexible field operation.

The structure of the mobile sludge treatment system of the present embodiment will be described in detail with reference to fig. 12 and 13.

The mobile oil sludge treatment system can be modified by various flat-bed semi-trailers and is dragged to move to a working place by the vehicle head 710. The mobile sludge treatment system of this embodiment includes a frame 720 and a plurality of treatment facilities disposed on the frame 720. The frame 720 is provided with a plurality of sets of frame legs 722, and the mobile sludge treatment system can play a role in supporting and stabilizing the frame legs 722 by beating the frame bottom 721 to support on the reliable ground before operation. (ii) a In addition, the frame 720 may be provided with a fence 723 which, when moved, stows equipment carried thereby, and which fence 723, when operated, opens for use as an operating platform.

Sequentially mounted on the carriage 720 from the front (in the direction of the head) to the rear (in the direction of the tail), a grinder 741; first and second horizontal agitators 742, 743 for performing the first oil separation treatment in stages or in parallel; an oil-water separator 744; a vertical mixer 745 for mixing the muddy water mixture to perform the second oil separation treatment; an oil sludge cleaning machine 746 for performing the second oil separation treatment; and a horizontal centrifuge 747 for separating sludge and water.

In the present embodiment, the important facilities for performing the sludge treatment process are provided on the frame 720 so as to be easily moved integrally. Moreover, the equipment is indispensable equipment in the sludge treatment process. For other large installations, such as crushers, silt separators, etc., it is possible to transport them separately from the mobile treatment platform. On one hand, the equipment volume is large, so that the mobile oil sludge treatment system is enlarged, the manufacturing cost of the treatment system is increased, on the other hand, the working environment requires that the ground foundation is firmer, and if the mobile oil sludge treatment system is placed in a mobile treatment platform, the hidden danger of production safety exists.

In order to further make the structure of the mobile sludge treatment system compact, as shown in fig. 12, a grinder 741 is provided on a receiving tank 751, so that the materials ground by the grinder 741 can be accumulated in the receiving tank 751, and the receiving tank 751 serves also as a carrier of the grinder 741.

In the present embodiment, the first and second horizontal agitators 742, 743 are provided, and the sludge contaminants can be treated simultaneously in parallel by the two horizontal agitators 742, 743, or the first oil separation treatment can be performed on the sludge contaminants in two stages, i.e., the first oil separation treatment and the second oil separation treatment.

Further, since the oil-water separator 744 having a multi-chamber structure can be formed to have a narrow and long shape, it can be provided along the longitudinal direction of the vehicle body frame 720 and arranged in parallel with the vertical mixer 745. Thus, sludge contaminants discharged from the second horizontal mixer 743 after the first oil separation treatment can be quickly fed into the external silt separator, and a sludge-water mixture separated from the lower portion of the silt separator and near the inlet side can be quickly fed into the vertical mixer 745, thereby reducing the distance of intermediate conveyance. And the uniformly mixed sludge-water mixture discharged from the vertical mixer 745 can be transported to the sludge cleaning machine 746 in a transport distance as short as possible.

Furthermore, the oil separated from the horizontal agitators 742, 743 and the sludge washer 746 can be easily fed to the oil-water separator 744 provided at the middle of the two, and similarly, the oil can be transported as short as possible.

The sludge-water mixture discharged from the sludge washer 746 can be sent to a horizontal centrifuge 747 provided at the rear of the vehicle frame 720 with a short conveyance distance, and the sludge-water mixture can be separated.

Finally, a control system 731 for controlling the devices and a generator unit 732 for supplying power to the devices are provided at the rearmost end of the vehicle frame 720. Therefore, the mobile sludge treatment system of the embodiment can perform centralized operation control at the tail part of the frame, and can facilitate emergency operation in the field under the power supply support of the generator set 732.

Furthermore, in case of emergency operation in the field, the requirement for separating mud and sand components is reduced accordingly, so that additional and smaller mud-sand separator can be used for mud-sand separation treatment.

As described above, the mobile sludge treatment system in this embodiment can complete the entire sludge contaminant purification treatment process with a minimum system configuration. In an extreme case, the sludge contaminants after the first oil separation treatment discharged from the horizontal agitators 742 and 743 are agitated by the vertical agitator 745 without performing the silt separation operation, and then washed by the sludge washer 746, and the silt components therein are not separated from each other, but the solid silt discharged from the horizontal centrifuge 747 also satisfies the emission standard.

The sludge purification treatment process of the present invention, and the treatment system having a specific structure comprising each facility and a plurality of facilities for carrying out the process have been described above, but the scope of the present invention is not limited thereto. Those skilled in the art can make various changes and improvements based on the contents described in the above embodiments, and such changes and improvements are included in the scope of the claims of the present invention.

Claims (8)

1. A portable sludge treatment system which characterized in that:

comprises a vehicle frame and vehicle-mounted equipment arranged on the vehicle frame,

the vehicle-mounted equipment sequentially comprises from the front side to the rear side of the frame:

a grinder disposed at a front side of the frame;

an oil separator disposed adjacent to the grinder;

a multi-cavity groove-type oil-water separator arranged along the length direction of the frame;

an oil sludge cleaning machine; and

the mud-water mixture is processed by a dehydrator,

grinding the sludge contaminants by the grinder, mixing and stirring the sludge contaminants with water in the oil separator, and performing oil separation treatment to remove oil components,

removing sand from the oily sludge pollutants subjected to oil separation by an external silt separator, cleaning the oil components on the surface of the sludge particles by the obtained mud-water mixture by using the oil sludge cleaning machine,

dehydrating the sludge-water mixture washed by the sludge washing machine by using the dehydrator,

and allowing the oil separator and the sludge washer to stand and separate oil and water in the oil component of the oil-water mixture removed by the oil separator and the sludge washer.

2. The sludge treatment system of claim 1 wherein:

a stirrer is arranged in parallel with the oil-water separator,

and stirring the mud-water mixture subjected to sand removal by an external sand-sand separator by using the stirrer, and then conveying the mixture to the oil sludge cleaning machine.

3. The sludge treatment system of claim 1 wherein:

two or more oil separators are provided between the grinder and the oil-water separator, and the two or more oil separators operate in parallel.

4. The sludge treatment system of claim 1 wherein:

and two or more oil separators disposed between the grinder and the oil-water separator, and performing oil separation treatment on sludge contaminants in stages by the two or more oil separators twice or more.

5. The sludge treatment system of claim 1 wherein:

and a material receiving box is arranged below the grinding machine, the grinding machine is carried on the material receiving box, and the ground oil sludge pollutants are temporarily stored in the material receiving box.

6. The sludge treatment system of claim 1 wherein:

and the tail part of the frame is provided with a generator set, and the generator set is used for supplying power to each device.

7. The sludge treatment system of claim 1 wherein:

and a control system is arranged at the tail part of the frame and is used for controlling the work of each device.

8. The sludge treatment system as claimed in any one of claims 1 to 7, wherein:

and a railing panel is arranged on the side of the frame and can be unfolded into an operating platform.

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