CN115536165A

CN115536165A - Compression station leachate treatment device

Info

Publication number: CN115536165A
Application number: CN202211024356.XA
Authority: CN
Inventors: 李耕宇; 邓方平; 吴豪; 陈龙; 吴亚帆; 胡熠; 易俊
Original assignee: Changsha Zoomlion Environmental Industry Co Ltd
Current assignee: Changsha Zoomlion Environmental Industry Co Ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2022-12-30

Abstract

The invention discloses a compression station leachate treatment device, which comprises: the sand settling mechanism comprises a sand settling box body and a sand collecting hopper, and the sand in the percolate flowing through the sand settling mechanism is deposited into the sand collecting hopper; the slag scraping mechanism comprises a conveying mechanism and a plurality of slag scraping plates fixed on the conveying mechanism; the conveying mechanism drives the plurality of slag scraping plates to move along the flowing direction of the percolate so that the scum in the percolate is pushed away from the liquid level; the device also comprises a grating mechanism, wherein the grating mechanism separates suspended impurities in the percolate; also comprises an oil-water separation mechanism for removing grease in the percolate. The compression station percolate treatment device provided by the invention can adapt to the characteristics of high impurity content, silt content and grease content in percolate, has the functions of oil removal and sand setting, and can well solve the problems of grease impurity adhesion and sedimentation and automatic impurity cleaning.

Description

Compression station leachate treatment device

Technical Field

The invention relates to the technical field of environmental protection, in particular to a compression station leachate treatment device.

Background

The urban domestic garbage compression station is also called a garbage transfer station and is an important part in the process of collecting and transferring the domestic garbage. The garbage compressor can be divided into a horizontal compression station and a vertical compression station according to different structures, and can be divided into a direct-compression type and a pre-compression type according to working modes. The crushing and extruding effects on the domestic garbage through the compressor can greatly improve the compactness and the specific gravity of the garbage and reduce the outward transportation number of the garbage. Meanwhile, the water content of the garbage discharged in the compression process can also reduce the workload of clearing and transporting, thereby avoiding the leakage of sewage in the transportation process and improving the degree of environmental sanitation.

According to the technical Specification of domestic waste transfer stations (CJJT 47-2016), section 7.1.5, the method that the transfer stations determine the sewage discharge and treatment forms of the transfer stations according to the environmental quality of the areas, the specific conditions of sewage collection and treatment systems and the like and the waste transfer process and meet the requirements of local environmental protection departments is required. Thus early many compression stations drained the percolate directly to the sewer. However, with the stricter environmental requirements in China, many places begin to require the realization of on-site standard treatment of the sewage of the compression station.

Because of the influence of garbage compression and crushing, the leachate in the compression station has great difference with leachate from other sources, and most notably high-content crushed fine garbage, silt, grease, suspended matters and the like. The impurities can cause the problems of silt siltation, blockage and clamping of a water pump pipeline, equipment abrasion and the like of a rear-end water treatment pool without being treated, and even directly influence the stability of a biochemical system.

In the existing concrete implementation process of pretreatment, the form of civil engineering and supporting equipment is generally adopted. The underground steel concrete water tank is influenced by the buried depth of the drainage ditch of the compression station, the working surface is narrow, the equipment is difficult to meet the requirements of automatically scraping impurities, clearing siltation and the like, and the equipment basically depends on manual clearing. This results in difficult operation and maintenance of the project and a safety risk in the case of a bad working sanitary environment.

Disclosure of Invention

The invention provides a compression station leachate treatment device, which aims to solve the technical problems that grease impurities are adhered and deposited and the impurities cannot be automatically cleaned when the leachate is treated in a compression station.

The invention provides a leachate treatment device for a compression station, which comprises:

the sand settling mechanism comprises a sand settling box body, the bottom of the sand settling box body is provided with an inclined bucket structure, and the inclined bucket structure forms a sand collecting bucket so that the sediment in the percolate flowing through the sand settling mechanism is deposited into the sand collecting bucket;

the slag scraping mechanism is positioned at the top of the sand setting box body and comprises a conveying mechanism and a plurality of slag scraping plates fixed on the conveying mechanism; the plurality of the slag scraping plates extend into the percolate in the grit box body, and the conveying mechanism drives the plurality of the slag scraping plates to move along the flowing direction of the percolate so that scum in the percolate is pushed away from the liquid level;

a liquid inlet of the grating mechanism is communicated with a liquid outlet of the sand setting tank body, and the grating mechanism separates suspended impurities in the percolate;

the liquid inlet of the oil-water separation mechanism is communicated with the liquid outlet of the grating machine, the oil-water separation mechanism comprises a reverse hopper structure and an inclined plate structure, and the reverse hopper structure is upwards arranged on the liquid level so as to enable the dispersed grease in the percolate to be gathered in the reverse hopper structure; the sloping plate structure is arranged in the percolate path in a countercurrent manner, so that oil droplets in the percolate are intercepted to the sloping plate structure and float upwards to the dumping hopper structure.

Furthermore, one end of the sand setting box body is provided with a water inlet pipe, the percolate enters the sand setting box body through the water inlet pipe, the cross sectional area of the sand setting box body is larger than that of the water inlet pipe, and the flow speed of the percolate entering the sand setting box body is reduced to be less than 5mm/s.

Further, the conveying mechanism is a chain type conveying mechanism, and the chain type conveying mechanism is arranged at one end far away from the water inlet pipe; the length of the chain type conveying mechanism is not more than two thirds of the length of the sand setting box body.

Further, the compression station percolate treatment device also comprises a sludge tank; the silt in the sand collecting hopper is conveyed to a sludge pond by the silt conveying screw.

Further, compression station filtration liquid processing apparatus still includes slag extractor, slag extractor is used for the outer row of dross, slag extractor includes: the scum scraping mechanism pushes the scum to the scum dragging platform from the liquid level and falls into the scum collecting groove; and a slag extracting screw is arranged at the bottom of the slag collecting groove and discharges the scum outwards.

Furthermore, a water collecting tank front section and a water collecting tank rear section which are mutually communicated are arranged between the liquid outlet of the sand setting tank body and the liquid inlet of the grid mechanism, the water collecting tank front section is communicated with the liquid outlet of the sand setting tank body, and the water collecting tank rear section is communicated with the liquid inlet of the grid mechanism;

and a gate is arranged between the front section of the water collecting tank and the rear section of the water collecting tank, and the percolate turns upwards from the front section of the water collecting tank through the gate to enter the rear section of the water collecting tank by lifting the valve so as to control the water level of the grit box body.

Furthermore, the grid mechanism comprises a grid machine and a grid groove, the suspended impurities are separated by the grid machine and then fall into a collecting device outside the compression station percolate treatment device, and percolate enters the grid groove.

Furthermore, a guide plate is arranged between the inverted bucket structure and the inclined plate structure, the guide plate extends into the liquid level to prevent oil on the water level from flowing backwards, and a communication hole is formed in the part, below the liquid level, of the guide plate.

Further, oil-water separation mechanism still includes a plurality of fill type structures of downward setting, fill type structure is equipped with the mud discharging port, the mud discharging port with sludge impoundment intercommunication.

Furthermore, the compression station leachate treatment device further comprises a lifting pump pool, a lifting pump is arranged in the lifting pump pool, and leachate discharged by the oil-water separation mechanism enters the lifting pump pool and is conveyed to a subsequent treatment mechanism by the lifting pump.

The invention has the following beneficial effects:

the compression station leachate treatment device provided by the invention reasonably adopts a four-stage separation function design, separates different garbage impurities at different functional sections, improves the treatment effect and reduces the operation requirement while ensuring the effect; removing larger sand grains and partial sludge in the percolate by adopting a sand settling mechanism; the scum and suspended impurities are removed by adopting a coarse-fine two-stage deslagging design of the scum scraping mechanism and the grating mechanism, so that the adaptability to the high-solid-oil-content wastewater is enhanced; the reinforced design of the inverted bucket structure and the inclined plate structure is adopted, and the grease removing effect is good.

The compression station percolate treatment device provided by the invention can adapt to the characteristics of high impurity content, silt content and grease content in percolate, has the functions of oil removal and sand setting, and can well solve the problems of adhesion and sedimentation of grease impurities and automatic impurity cleaning. The automatic cleaning and manual cleaning-free function is realized while silt and grease in the percolate are intercepted, and the pipe transportation and maintenance work for treating the percolate in the compression station is greatly reduced.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:

FIG. 1 is a top view of a compression station leachate treatment apparatus provided by the present invention;

FIG. 2 is a perspective view of the leachate treatment apparatus of the compression station of the present invention, shown in FIG. 1;

FIG. 3 is a side view of the leachate treatment apparatus of the compression station provided by the present invention;

FIG. 4 is a perspective view of the leachate treatment apparatus of the compression station provided by the present invention, as shown in FIG. 2;

figure 5 is a partial perspective view of the compression station leachate treatment apparatus provided by the present invention.

Illustration of the drawings:

1. a water distribution platform; 11. a water inlet pipe; 12. a feed inlet; 2. a sand settling mechanism; 21. a sand setting box body; 22. a sand collecting hopper; 23. a silt conveying screw; 3. a slag scraping mechanism; 31. a transfer mechanism; 311. a motor, 312, a chain; 32. a slag scraping plate; 4. a slag discharging mechanism 41, a slag dragging platform 42, a slag collecting groove 43 and a slag extracting screw; 5. a gate; 6. a water collection tank front section; 7, a water collecting tank rear section; 8. a grid mechanism; 81. a grating machine, 82 grating grooves; 9. an oil-water separation mechanism; 91. A bucket-tipping structure; 92. an inclined plate structure; 93. a bucket-type structure; 931. a sludge discharge port; 10. an oil pipe is connected; 11. a guide plate and a 12-lift pump pool; 121. a water outlet; 13 a sludge tank; 131 sludge outlet; 14. a baffle plate; 15. a garbage can.

Detailed Description

In order to make the objects, technical solutions and advantageous technical effects of the present invention more clear, the present invention is further described in detail with reference to the following embodiments. It should be understood that the embodiments described in this specification are only for explaining the present invention and are not intended to limit the present invention.

For the sake of brevity, only a few numerical ranges are explicitly disclosed herein. However, any lower limit may be combined with any upper limit to form ranges not explicitly recited; and any lower limit may be combined with any other lower limit to form a range not explicitly recited, and similarly any upper limit may be combined with any other upper limit to form a range not explicitly recited. Also, although not explicitly recited, each point or individual numerical value between the endpoints of a range is encompassed within that range. Thus, each point or individual value can form a range not explicitly recited as its own lower or upper limit in combination with any other point or individual value or in combination with other lower or upper limits.

In the description herein, it is to be noted that, unless otherwise specified, "above" and "below" are inclusive, and "a plurality" of "one or more" means two or more.

The compression station leachate refers to leachate generated after being crushed and extruded by a garbage compressor, and has the following characteristics: (1) The leachate of the compression station contains a large amount of residue particles and fiber hairs generated by compression and crushing, and the residues comprise various wastes such as melon and fruit seeds, vegetable leaves, sawdust, short branches, plastic fragments, silt, hair, feathers, fiber bags and the like, and are easy to wind and block the filter screen and holes. (2) The leachate of the compression station contains a large amount of grease which is from kitchen garbage thrown by citizens and other packaged foods containing oil, the grease forms viscous foam on the water surface and is bonded with fiber silt, the flowability is extremely poor, and particularly, the leachate is easy to solidify and harden on the surface of equipment to block overflowing parts and holes at low temperature in winter. (3) Most of the leachate in the compression station is acidic in fermentation, and the pH value is about 4.0, so that the leachate has strong corrosion to equipment. (4) The compression station percolate has higher silt content and mainly comes from silt and dust poured into urban pavements for cleaning and the like.

As shown in fig. 1 to 5, an embodiment of the present invention provides a leachate treatment apparatus for a compression station, comprising:

the sand settling mechanism 2 comprises a sand settling box body 21, the bottom of the sand settling box body 21 is provided with an inclined bucket structure, and the inclined bucket structure forms a sand collecting bucket 22 so that the sand in the percolate flowing through the sand settling mechanism 2 is deposited into the sand collecting bucket 22;

the slag scraping mechanism 3 is positioned at the top of the grit box body 21, and comprises a conveying mechanism 31 and a plurality of slag scraping plates 32 fixed on the conveying mechanism 31; the plurality of scraper plates 32 extend into the percolate in the grit box body 21 (can be vertically arranged relative to the water surface), and the conveying mechanism 31 drives the plurality of scraper plates 32 to move along the flow direction of the percolate so as to push the scum in the percolate away from the liquid surface;

a liquid inlet of the grating mechanism 8 is communicated with a liquid outlet of the sand setting tank body 21, and the grating mechanism 8 separates suspended impurities in the percolate;

the liquid inlet of the oil-water separation mechanism 9 is communicated with the liquid outlet of the grating machine 81, the oil-water separation mechanism 9 comprises a back-dumping structure 91 and an inclined plate structure 92, and the back-dumping structure 91 is arranged on the liquid level so as to enable the dispersed grease in the percolate to be gathered in the back-dumping structure 91; the sloping plate structure 92 is arranged in the percolate path in a counterflow manner, so that oil droplets in the percolate are retained to the sloping plate structure 92 and float upwards into the dump bucket structure 91.

The compression station leachate treatment device provided by the invention reasonably adopts a four-stage separation function design, separates different garbage impurities at different functional sections, improves the treatment effect and reduces the operation requirement while ensuring the effect; removing larger sand grains and partial sludge in the percolate by adopting a sand settling mechanism 2; the coarse-fine two-stage deslagging design of the slag scraping mechanism 3 and the grid mechanism 8 is adopted to remove scum and suspended impurities, so that the adaptability to the high solid-oil-content wastewater is enhanced; the reinforcing design of the inverted bucket structure 91 and the inclined plate structure 92 is adopted, and the grease removing effect is good.

The compression station percolate treatment device provided by the invention can adapt to the characteristics of high impurity content, silt content and grease content in percolate, has the functions of oil removal and sand setting, and can well solve the problems of grease impurity adhesion and sedimentation and automatic impurity cleaning. The automatic cleaning and manual cleaning-free function is realized while silt and grease in the percolate are intercepted, and the pipe transportation and maintenance work for treating the percolate in the compression station is greatly reduced.

In the embodiment of the present application, the sand setting mechanism 2 includes the sand setting box 21, the bottom of the sand setting box 21 is set to be the inclined bucket structure, the inclined bucket structure forms the sand collecting hopper 22, so that the silt in the leachate of the sand setting mechanism 2 flowing through is deposited to the sand collecting hopper 22.

The percolate enters the sand setting box body 21 through the water inlet pipe 11, the cross section area of the sand setting box body 21 is larger than that of the water inlet pipe 11, and the flow rate of the percolate entering the sand setting box body 21 is reduced to be less than 5mm/s.

The compression station leachate treatment device also comprises a sludge tank 13; the sand collecting hopper 22 bottom is equipped with silt and carries screw 23, silt in silt carrying screw 23 carries sand collecting hopper 22 to sludge impoundment 13 in, is equipped with mud export 131 on the sludge impoundment 13.

Specifically, the percolate of the compression station enters from the water inlet pipe 11 on the left side of the water distribution platform 1 and uniformly flows into the sand setting tank 21; because the cross-sectional area of the grit box 21 is far larger than that of the water inlet pipe 11, the flow speed of the percolate is less than 5mm/s, and sand grains larger than 0.2mm and partial sludge are downwards deposited in the sand collecting hopper 22 under the action of gravity. The water distribution platform 1 and the sand setting tank body 21 are isolated by adopting a perforated plate, and the flowing of sewage is blocked by adopting a perforated mode, so that the flowing kinetic energy of the sewage entering the water distribution platform can be reduced, and the impact influence of the sewage on the water surface of the subsequent sand setting tank body 21 is reduced.

Be equipped with silt in sand collection hopper 22 and carry spiral 23, can transport the silt impurity that falls into to the right (using fig. 1 as the reference, feed inlet 12 is located the device right side) to fall into sludge impoundment 13 through the pipeline of sand collection hopper 22 rightmost side bottom, and arrange outward through the extra sand pump that carries of collocation, realize first order silt separation function promptly.

The bottom of the sand setting box body 21 is of an inclined hopper structure to form a sand collecting hopper 22, and a horizontal shaftless sediment conveying screw 23 is arranged at the bottom in the sand collecting hopper 22; the silt conveying screw 23 horizontally penetrates through the sand setting box body 21 and is communicated to a sand discharge outlet at the right side of the bottom of the sand collecting hopper 22; the sand discharge outlet is connected with a sludge tank 13 through a valve pipeline.

In the embodiment of the present application, the slag scraping mechanism 3 is located at the top of the grit chamber 21, and includes a conveying mechanism 31, and a plurality of slag scraping plates 32 fixed on the conveying mechanism 31; a plurality of scraping plates 32 extend into the percolate (which may be vertically arranged) in the grit chamber 21, and the conveying mechanism 31 drives the plurality of scraping plates 32 to move along the flow direction of the percolate, so that the scum in the percolate is pushed away from the liquid level.

The conveying mechanism 31 is a chain type conveying mechanism and comprises a chain 312 and a motor 311; the chain type conveying mechanism is arranged at one end far away from the water inlet pipe 11; the length of the chain type conveying mechanism is not more than two thirds of the length of the grit box body 21.

The compression station leachate treatment device further comprises a slag discharge mechanism 4, wherein the slag discharge mechanism 4 comprises: the slag salvaging platform 41 and the slag collecting groove 42 arranged below the slag salvaging platform 41, the slag salvaging platform 41 is connected with the slag scraping mechanism 3, the slag scraping mechanism 3 pushes the scum from the liquid level to the slag salvaging platform 41, and the scum falls into the slag collecting groove 42; and a slag extracting spiral 43 is arranged at the bottom of the slag collecting groove 42, and the scum is discharged outside by the slag extracting spiral 43.

Specifically, light garbage contained in the percolate in the sand setting tank body 21, such as melon shell, grease foam, fiber hair, plastics, cigarette end and the like, can float to the water surface. The scum board 32 arranged on the grit chamber 21 makes unidirectional motion on the water surface under the traction of the conveying mechanism 31, and can push impurities floating on the water surface to a position away from the liquid surface, and push the impurities to the scum dredging platform 41 and fall into the scum collecting tank 42.

The bottom of the slag collecting groove 42 is provided with a slag extracting screw 43 which can convey impurities out of the leachate treatment device of the compression station, and the impurities fall into the garbage can 15 through a slag falling port, so that the function of separating coarse garbage of the second stage is completed. Through the second-stage separation function, most of large-size coarse garbage and most of light garbage such as grease fiber hair plastic can be removed, the load and influence of a subsequent filter are reduced, and the processing precision of the filter is improved.

The top of the sand setting box body 21 is provided with a walking type slag scraping plate 32, the walking type slag scraping plate 32 adopts a chain transmission type rotary structure, and the concrete structure is that a motor 311 starts a chain 312 to drive a rubber plate which is fixed on the chain 312 and is vertical to the water surface. For example, can be for two chain structures, the setting from top to bottom of two chains, the chain drive of below is installed the scum board 32 on it and is moving towards the direction that the filtration liquid flows, along with the electronic double-chain of motor lasts the rotation, the chain drive scum board 32 work in turn of upper and lower side.

The scraper 32 may be a rubber plate. The scum on the water surface is pushed to the left side of the grit box 21 (the feed inlet 12 is positioned on the right side of the device by the unidirectional running of the rubber plate on the water surface with reference to fig. 1). In some embodiments, the water surface travel of the rubber plates driven by the chain 312 covers two thirds of the length of the sand setting tank 21 from the left side to the right side.

And a slag salvaging platform 41 is arranged at the top of the left side of the sand setting box body 21 and is used for matching with the slag scraping plate 32 to take the scum away from the water surface. The slag salvaging platform is arranged on the water surface at an oblique angle of 4.5 degrees, the left side is higher than the water surface and is connected to the slag collecting groove 42, and the right side is lower than the water surface. As the scraper bar 32 moves from right to left, it pushes the water dross to slide up the skimming platform 41 and continue to move with the slope of the skimming platform until it falls into the dross collecting trough 42 (with reference to fig. 1, the inlet 12 is located on the right side of the apparatus). The bottom of the slag collecting groove 42 is provided with a slag lifting screw 43, and the falling scum can be conveyed to the outside of the equipment, such as the garbage can 15, through the lifting action of the slag lifting screw 43.

And the grid mechanism 8 is used for separating suspended impurities in the percolate, wherein a liquid inlet of the grid mechanism 8 is communicated with a liquid outlet of the sand settling box body 21, and the grid mechanism 8 is used for separating the suspended impurities in the percolate.

In the embodiment of this application, the liquid outlet of grit box 21 with still include the water catch bowl between the inlet of grid mechanism 8, the water catch bowl comprises water catch bowl anterior segment 6 and water catch bowl back end 7 that communicate each other, water catch bowl anterior segment 6 with the liquid outlet of grit box 21 communicates, water catch bowl back end 7 with the inlet of grid mechanism 8 communicates, water catch bowl anterior segment 6 with be equipped with gate 5 between the water catch bowl back end 7, the liquid level of sewage in the grit box 21 can be controlled through the lift of valve.

Leachate in the grit box body 21 enters the front water collecting tank section 6 on the right side of the slag collecting tank 42 through a communication channel at the lower part of the slag collecting tank 42, then flows upwards to cross the gate 5 and enters the rear water collecting tank section 7, and then enters the grid mechanism 8 through a pipeline.

The sand setting tank bodies 21 on the two sides of the slag collecting groove 42 are communicated with the water collecting groove at the lower part of the slag collecting groove 42. The silt deposit box sewage upwards gets into the water catch bowl through this intercommunication down, and the water catch bowl effect is the sewage after collecting the silt deposit box slagging-off sand setting, and it sets up to two segmentation structures in front and back, and the centre is equipped with gate 5, realizes the liquid level control to the play water. The end of the water collecting tank is provided with a liquid outlet.

The structural member and the equipment form a first area of the solid-liquid separation device from right to left, and the rest equipment is positioned in a second area of the solid-liquid separation device. The second area device and the first area are in a parallel ladder structure and are positioned obliquely below the first area.

The grating mechanism 8 comprises a grating machine 81 and a grating groove 82, after suspended impurities are separated by the grating machine 81, the suspended impurities fall into a collecting device outside the compression station percolate treatment device, and percolate obtained after the suspended impurities are separated enters the grating groove 82.

Specifically, after the second-stage coarse garbage separation, large-size coarse garbage in the sewage is separated, and viscous substances such as fiber, grease and the like are greatly reduced, so that the grating mechanism 8 adopts a rotary brush type grating machine structure form, and can separate suspended impurities larger than 1mm in the water. Meanwhile, the rotating brush type grating machine is provided with a self-cleaning brush, so that the adhesion and blockage of grease under the low-temperature condition can be prevented to the greatest extent.

Specifically, sewage enters the grid machine 81 through a liquid inlet of the grid mechanism 8 and then falls downwards into a parallel grid net consisting of arc-shaped grids, the distance between every two arc-shaped grids is 1mm, the sewage falls into a water outlet below through the grid net, and suspended impurities are intercepted on the grid net. A shaft capable of rotating around the center is arranged in the grating machine 81, and rotating brush plates are symmetrically fixed on the shaft and can rotate continuously along with the shaft. The rotating track of the rotating brush plate is just overlapped with the edge of the arc-shaped grid net, and the tail end of the rotating brush plate is provided with a steel wire brush which can extend into the internal gap of the grid net. The brush effect is scraped in the incessant rotation of commentaries on classics brush board, can be with remaining suspension impurity propelling movement to the slag notch on the grid net to fall into the outside collection device of equipment, like in the garbage bin, sewage then gets into grid groove 82. Thus, the third stage separation function is completed.

To the left of the second region is a grid groove 82 (with reference to fig. 1, the grid mechanism 8 is located on the left side of the device), and the left side of the grid groove 82 is flush with the left side of the water collection tank; a grating machine 81 is arranged above the grating grooves 82; the left side panel of the grid machine 81 is provided with a water inlet which is connected with a liquid outlet at the rear end of the first area water collecting tank through a pipeline.

The oil-water separation mechanism 9, the inlet of the oil-water separation mechanism 9 with the liquid outlet of the grid groove 82 communicates, as shown in fig. 5, the liquid outlet of the grid groove 82 is provided with a plurality of water outlets, the water passing effect through the holes can enable sewage to uniformly flow into the oil-water separation mechanism 9, and the sewage is prevented from flowing bias/short.

The oil-water separation mechanism 9 comprises a dumping bucket structure 91 and an inclined plate structure 92, wherein the dumping bucket structure 91 is arranged on the liquid level, and the tip is upward so as to enable dispersed grease in the percolate to be gathered in the tip of the dumping bucket structure 91; the sloping plate structure 92 is arranged in the percolate path in a countercurrent manner, so that oil droplets in the percolate are trapped in the sloping plate structure 92, and the trapped oil droplets can float to the upper hopper structure 91.

A guide plate 11 is arranged between the inverted bucket structure 91 and the inclined plate structure 92, the guide plate 11 extends into the liquid level (can be vertically arranged relative to the water level), and the part of the guide plate 11 below the liquid level is provided with a communicating hole to prevent the water-level grease in the inverted bucket structure 91 from flowing into the inclined plate structure 92.

Oil-water separation mechanism 9 is still including a plurality of fill type structures 93 that set up downwards, fill type structure 93 can further collect sunken tiny silt, fill type structure 93 is equipped with row mud mouth 931, row mud mouth 931 through pipeline and valve with sludge impoundment 13 intercommunication, the silt of collection can be arranged into in the sludge impoundment 13.

The compression station leachate treatment device further comprises a lifting pump pool 12, a lifting pump 121 is arranged in the lifting pump pool 12, and leachate discharged by the oil-water separation mechanism 9 enters the lifting pump pool 12 and is conveyed to a subsequent treatment mechanism by the lifting pump 121 for further treatment or utilization.

Specifically, the sewage in the grid grooves 82 enters the inverted bucket structure 91 to the right (referring to fig. 1, the feed port 12 is located on the right side of the device), wherein the dispersed grease in the sewage floats upwards and gathers in the center of the top inverted bucket structure 91, and the sewage enters the inclined plate structure 92 from the lower part. Swash plate structure 92 adopts the design of adverse current swash plate oil removal, and swash plate structure 92 can make the diameter be greater than 90 um's tiny oil droplet and further hold back, then the come-up is to the gathering of top fill structure 91. And finally, sewage enters from the overflowing hole at the top of the lifting pump pool 12, is lifted by the sewage pump and is sent to a subsequent water treatment system through the water outlet 122, and the fourth-stage oil-water separation function is realized.

A glass observation port and an oil receiving pipe 10 are arranged in the middle of the inverted bucket structure 91; the grease can be drawn out of the device from the oil pipe 10; the bottom of the oil-water separation mechanism 9 is downwards provided with a plurality of bucket-shaped structures 93 which are continuously distributed, the bucket-shaped structures 93 are provided with sludge discharge openings 931, and the sludge discharge openings 931 are communicated with the sludge pool 13.

The right side of the inclined plate structure 92 is connected with the lift pump pool 12 through a baffle plate 14; the lift pump tank 12 and the sludge tank 13 are longitudinally arranged in front and back (referred to as figure 2, and the position close to the reader is referred to as front); the top of the baffle plate 14 is provided with a hole which is communicated with the lift pump pool 12.

A lifting water pump is arranged in the lifting pump pool 12, a water pipe penetrates through the top of the lifting pump pool 12 to be connected with the lifting water pump, and the other end of the water pipe extends to a rear-end water utilization device.

In some embodiments, the sludge tank 13 is flush with the right side of the lift pump tank 12 and the grit chamber 21 is flush with the right side of the distribution platform 1 (referring to fig. 2, the feed inlet 12 is located on the right side of the device).

In some embodiments, all of the tank, the trough and the pond are provided with a bottom emptying pipeline and a valve.

In some embodiments, all of the tanks, troughs, and tanks are sealed by removable cover plates.

In some embodiments, all of the boxes, tanks and tanks are treated with stainless steel or carbon steel for corrosion protection.

In some embodiments, the grillage machine 81 is a rotating brush type grill or a hydraulic grill with a self-cleaning function.

According to the compression station leachate treatment device, through the first, second, third and fourth stage separation functions, separation of impurities such as large-size coarse garbage, fibers, hair, grease, silt, plastics and the like is completed, the interception function is reasonably distributed to targeted functional equipment and structures, the treatment effect is improved while the load of single equipment is reduced, the maintenance requirement is reduced, and the compression station leachate treatment device has good adaptability to high-oil high-slag-content wastewater of a compression station.

In conclusion, the compression station leachate treatment device provided by the invention has the following advantages:

the four-stage separation function design is reasonably adopted, different garbage impurities are separated in different functional sections, the treatment effect is improved and the operation requirement is reduced while the effect is ensured; the coarse and fine two-stage deslagging design of the slag scraping mechanism 3 and the grid mechanism 8 is adopted, so that the adaptability to the high solid-oil-containing wastewater is strengthened. The reasonable layout design of the slag extracting screw 43 and the silt conveying screw 23 is adopted to realize the automatic interception, separation and lifting outward transportation of impurities and silt in the percolate; especially for light and loose sedimentary sludge, the sludge can be well collected and discharged out of the box body. The oil-water separation mechanism 9 has a good grease removal effect by adopting a reinforced design of matching the inverted bucket structure 91, the inclined plate structure 92 and the bucket structure 93. The design of the water distribution platform 1, the water collecting tank gate 5, the grid operation guide holes and the like is adopted, so that the water quantity fluctuation adaptability is enhanced. The concrete body is as follows:

(1) The two-stage deslagging of the slag scraping mechanism 3 and the grid mechanism 8 is adopted, so that the pollution and blockage resistant performance is good, and the adaptability to oil sludge and viscous impurity sewage is particularly strong.

(2) Compared with other solid-liquid separators, the residue scraping mechanism 3 can also remove floating oil and viscous sludge on the water surface, can prevent the floating oil and the viscous sludge from being accumulated and hardened, and is more suitable for the percolate of the compression station.

(3) The rotating brush type grating machine has a self-cleaning function, and the requirement for cleaning and maintaining equipment is reduced.

(4) Adopt and to constitute the two-stage oil-water separation structure of mutually supporting with sloping structure 92 by the structure of falling fill 91, strengthen the grease and get rid of the effect, it is efficient to degrease, and the effluent oil content is low.

(5) Adopt and carry sediment spiral 43 and silt to carry spiral 23, can accomplish the promotion of impurity silt through the spiral and arrange outward, avoid artifical clear work of dragging for, the operation maintenance work is more simple and convenient.

(6) The silt lifting function of the sludge temporary storage tank and the sand lifting pump is adopted, and the problem that a large amount of light deposited silt in the percolate can not be lifted through the inclined spiral is solved.

(7) The totally-sealed structure design avoids the influence of odor overflow.

While the present application has been described with reference to preferred embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application, and in particular, features shown in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. A compression station leachate treatment plant, comprising:

the sand settling mechanism (2) comprises a sand settling box body (21), the bottom of the sand settling box body (21) is provided with an inclined hopper structure, and the inclined hopper structure forms a sand collecting hopper (22) so that silt in percolate flowing through the sand settling mechanism (2) is deposited into the sand collecting hopper (22);

the slag scraping mechanism (3) is positioned at the top of the sand setting box body (21) and comprises a conveying mechanism (31) and a plurality of slag scraping plates (32) fixed on the conveying mechanism (31); the plurality of the slag scraping plates (32) extend into the percolate in the grit box body (21), and the conveying mechanism (31) drives the plurality of the slag scraping plates (32) to move along the flow direction of the percolate so that the scum in the percolate is pushed away from the liquid level;

the liquid inlet of the grating mechanism (8) is communicated with the liquid outlet of the sand setting box body (21), and the grating mechanism (8) separates suspended impurities in the percolate;

the liquid inlet of the oil-water separation mechanism (9) is communicated with the liquid outlet of the grating machine (81), the oil-water separation mechanism (9) comprises a back-tipping structure (91) and an inclined plate structure (92), and the back-tipping structure (91) is upwards arranged on the liquid level so as to enable dispersed grease in the percolate to be gathered in the back-tipping structure (91); the sloping plate structure (92) is arranged in the percolate path in a counterflow manner, so that oil droplets in the percolate are trapped to the sloping plate structure (92) and float upwards to the dumping hopper structure (91).

2. The compression station leachate treatment apparatus as claimed in claim 1, wherein the leachate is introduced into the grit chamber (21) via a water inlet pipe (11), the grit chamber (21) having a cross-sectional area greater than the cross-sectional area of the water inlet pipe (11), and the velocity of the leachate is reduced to less than 5mm/s after entering the grit chamber (21).

3. The compression station percolate treatment installation according to claim 2, characterised in that the conveying mechanism (31) is a chain-type conveying mechanism, the chain-type conveying mechanism (31) being arranged at the end remote from the inlet pipe (11); the length of the chain type conveying mechanism does not exceed two thirds of the length of the sand setting box body (21).

4. The compression station percolate treatment arrangement according to claim 1, characterised in that it further comprises a sludge basin (13); sediment transport screw (23) are equipped with in sand collection hopper (22) bottom, sediment transport screw (23) carry the sediment in sand collection hopper (22) extremely in sludge impoundment (13).

5. The compression station leachate treatment apparatus of claim 1, wherein said compression station leachate treatment apparatus further comprises a slag removal mechanism (4), said slag removal mechanism (4) comprising: the slag salvaging platform (41) and the slag collecting groove (42) are arranged below the slag salvaging platform (41), the slag salvaging platform (41) is connected with the slag scraping mechanism (3), and the slag scraping mechanism (3) pushes the scum to the slag salvaging platform (41) from the liquid level and falls into the slag collecting groove (42); and a slag extracting spiral (43) is arranged at the bottom of the slag collecting groove (42), and the scum is discharged outside by the slag extracting spiral (43).

6. The leachate treatment apparatus of a compression station as claimed in claim 1, wherein a front water collecting tank section (6) and a rear water collecting tank section (7) which are communicated with each other are further included between the liquid outlet of the grit chamber body (21) and the liquid inlet of the grid mechanism (8), the front water collecting tank section (6) is communicated with the liquid outlet of the grit chamber body (21), and the rear water collecting tank section (7) is communicated with the liquid inlet of the grid mechanism (8);

the water collecting tank is characterized in that a gate (5) is arranged between the front water collecting tank section (6) and the rear water collecting tank section (7), and the lifting of the valve enables percolate to upwards turn over the gate (5) from the front water collecting tank section (6) to enter the rear water collecting tank section (7) so as to control the water level of the sand setting tank body (21).

7. The compression station percolate treatment installation according to claim 1, characterised in that the grate means (8) comprise a grate machine (81) and a grate trough (82), the suspended impurities being separated by the grate machine (81) and falling into a collecting device outside the compression station percolate treatment installation, the percolate entering the grate trough (82).

8. The leachate treatment plant of claim 1 wherein a deflector (11) is disposed between the dumping structure (91) and the sloping plate structure (92), the deflector (11) extends into the liquid surface to prevent the backward flow of the oil on the liquid surface, and the deflector (11) is provided with a communication hole in the portion below the liquid surface.

9. The compression station percolate treatment device according to claim 4, wherein the oil-water separation mechanism (9) further comprises a plurality of bucket-shaped structures (93) arranged downwards, the bucket-shaped structures (93) are provided with sludge discharge ports (931), and the sludge discharge ports (931) are communicated with the sludge tank (13).

10. The compression station percolate treatment apparatus according to claim 1, characterised in that it further comprises a lift pump basin (12), a lift pump (121) is arranged in the lift pump basin (12), the percolate discharged by the oil/water separation mechanism (9) enters the lift pump basin (12) and is transported by the lift pump (121) to the subsequent treatment mechanism.