Mobile vehicle-mounted oil-water separation method and sewage treatment system thereof

Abstract

The invention discloses a mobile vehicle-mounted oil-water separation method and a sewage treatment system thereof, and the steps are as follows: sewage is fed into a flat plate conveying type solid-liquid separation process I for solid-liquid separation to obtain an oil-water mixed solution and solid residues, the oil-water mixed solution is subjected to oil-water separation to obtain a first-stage filtrate, and then the first-stage filtrate is fed into a fast flocculation process; the method comprises the following steps: firstly adjusting the pH value, then sequentially adding ferric sulfate and a flocculating agent to realize rapid flocculation, enabling supernatant liquid to overflow into a slow flocculation process for slow flocculation, filtering the supernatant liquid subjected to slow flocculation through a self-cleaning filtering process and a bag type filtering process, and finally feeding the supernatant liquid into a clear water storage and overflow discharge process for direct discharge. Sewage residues generated in the self-cleaning filtering process enter a flat plate conveying type solid-liquid separation process II to realize second-stage solid-liquid separation, second-stage filtrate and second-stage solid residues are obtained, the second-stage filtrate enters a buffering process and then is fed into a bag type filtering process to be filtered, and the filtered second-stage filtrate enters a clear water storage and overflow discharge process. The treatment effect is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field related to environmental protection equipment, and in particular relates to a mobile vehicle-mounted oil-water separation method and a sewage treatment system thereof. Background Art

[0002] Kitchen waste can be divided into two categories: kitchen waste and waste edible oils and fats. Kitchen waste refers to food residues and food processing waste; waste edible oils and fats refer to inedible animal and plant fats and fats and various oil-water mixtures, including oils and fats that have been fried and are no longer edible, commonly known as "old grease". The grease and oil-water mixture in kitchen waste is commonly known as "swill oil", and the grease produced after separation and treatment by oil-water separators, grease traps, etc. is commonly known as "gutter oil".

[0003] In practice, garbage transfer trucks are generally used to collect, transport and process food waste in a unified manner, separate solid waste from liquid waste in the food waste. Liquid waste is a water-oil mixture, and then the water-oil mixture can be separated to collect waste gas grease for industrial use.

[0004] Therefore, our company is involved in the vehicle-mounted oil-water separation system, but the oil-water separation system originally applied for by our company has the following problems:

[0005] 1. The original solid-liquid separation system generally uses conveyor belt filtration, but the conveyor belt filtration has the problem of complex overall structure;

[0006] 2. The existing oil-water separation tanks are numerous, so the structure is complex and the volume is large;

[0007] 3. The original dosing method used a single PAM drug, resulting in poor flocculation effect;

[0008] 4. The later filters use activated carbon filters, so the activated carbon filter material needs to be replaced regularly in the later stage, which is relatively environmentally unfriendly;

[0009] 5. Originally, a screw stacking machine was used to separate the solid and liquid from the wastewater after backwashing. However, since ordinary screw stacking machines consume several kilowatts of energy, have a large size, and a relatively small processing capacity of only 1.5 tons, improvements are needed. Summary of the invention

[0010] The purpose of the present invention is to provide a mobile vehicle-mounted oil-water separation sewage treatment system, which solves the problems existing in the existing oil-water separation equipment.

[0011] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0012] The present invention is a mobile vehicle-mounted oil-water separation method, which includes: a flat plate conveying solid-liquid separation process 1, a rapid flocculation process, a slow flocculation process, a self-cleaning filtration process, two groups of bag filtration processes, a flat plate conveying solid-liquid separation process 2, a buffer process, a clean water storage and overflow discharge process, and multiple groups of dosing processes. The specific steps are as follows:

[0013] S1. The sewage mixture to be treated is sucked into the flat plate conveying type solid-liquid separation process one through a sewage suction pump, and the sewage mixture is subjected to a first-level solid-liquid separation by the flat plate conveying type solid-liquid separation process one, thereby obtaining a first-level oil-water mixture and a first-level solid residue, and the generated first-level solid residue is sent to a garbage bin one; the first-level oil-water mixture is placed in a volume of a set depth, so that the first-level oil-water mixture can obtain an oil layer and a first-level filtrate in a layered manner based on the density difference between oil and liquid, and the first-level filtrate is pumped into the rapid flocculation process through a water supply pump one;

[0014] S2. In the rapid flocculation process, alkali solution is first added to adjust the pH value of the first-stage filtrate, and then iron sulfate PFS and flocculant PAM are added in sequence, and the stirrer is used to rotate at high speed to achieve rapid flocculation. The upper layer of flocculated liquid overflows into the slow flocculation process;

[0015] S3, in the slow flocculation process, slow flocculation is performed, and the upper layer liquid after slow flocculation is extracted by the second water supply pump and then passes through the self-cleaning filtration process and one group of bag filtration processes for secondary filtration, and finally the qualified water is stored in the clean water storage and overflow discharge process;

[0016] S4, the sewage residue generated by backwashing during the self-cleaning filtration process enters the flat conveying solid-liquid separation process 2 to achieve secondary solid-liquid separation, and thereby obtains the second-stage filtrate and the second-stage solid residue. The filtered second-stage filtrate enters the buffer process, and the generated second-stage solid residue is sent to the garbage bin 2;

[0017] S5. The water in the buffer tank is pumped out by water supply pump 3 and sent to another set of bag filter process for filtration, and then sent to the clean water storage and overflow discharge process for storage;

[0018] S6. Water in the clean water storage and overflow discharge process can be discharged directly.

[0019] Preferably, in order to achieve oil-water separation, several groups of oil-water separation processes using acrylic rollers for oil-water separation are added to the flat plate conveying solid-liquid separation process 1 in step S1 to separate the oil layer and the first-stage filtrate, and the separated oil is sent to the oil tank.

[0020] Preferably, in order to improve the filtering effect, the filtering accuracy in the first flat plate conveying type solid-liquid separation step is 0.1-0.3 mm, and the filtering accuracy in the second flat plate conveying type solid-liquid separation step is 0.05-0.2 mm.

[0021] Preferably, in order to improve the filtering effect, the filtering accuracy of one set of self-cleaning filtering process is 100 μm, and the filtering accuracy of two sets of bag filtering processes is 5 μm.

[0022] The present invention also discloses a mobile vehicle-mounted sewage treatment system for oil-water separation, comprising a main body arranged on a vehicle body, wherein the main body comprises a flat-plate sludge dehydrator 1, an oil-water separation chamber, an oil tank, a rapid flocculation tank, a slow flocculation tank, a self-cleaning filter, two groups of bag filters, a flat-plate sludge dehydrator 2, a buffer tank, a clean water tank, a garbage bin 1, a garbage bin 2 and three groups of dosing boxes, wherein the flat-plate sludge dehydrator 1 is located above the oil-water separation chamber, and the bottom of the flat-plate sludge dehydrator 1 is connected to the oil-water separation chamber, a plurality of groups of acrylic rollers for scraping off the upper floating oil are arranged above the oil-water separation chamber, an oil guide groove for collecting oil is arranged on the side of the acrylic roller, the other end of the oil guide groove is connected to the oil tank, the oil-water separation chamber is connected to the rapid flocculation tank through a water supply pump 1, and the three groups of dosing boxes are respectively a NaOH dosing box, a PFS dosing box and PAM dosing box, and the outputs of the three dosing boxes are respectively connected to the fast flocculation box for dosing the fast flocculation box; the fast flocculation box is connected to the slow flocculation box through the overflow port and the connecting pipe one, the output of the slow flocculation box is connected to the liquid inlet of the self-cleaning filter through the water supply pump two, the liquid outlet of the self-cleaning filter is connected to the liquid inlet of a group of bag filters through the connecting pipe two, and the liquid outlet of the group of bag filters is connected to the clean water tank, a drain port is provided on the side of the clean water tank, the slag outlet of the self-cleaning filter is connected to the inlet of the flat-plate sludge dewatering machine two, the slag outlet of the flat-plate sludge dewatering machine two is connected to the garbage bin two, the liquid outlet of the flat-plate sludge dewatering machine two is connected to the buffer tank, the output of the buffer tank is sent to another group of bag filters for filtration through the water supply pump three, and the filtered clean water is sent to the clean water tank through the pipe three.

[0023] Preferably, in order to improve the drug mixing effect, a dosing pump is provided at the output end of each of the three groups of dosing boxes, and a stirring device is provided in each of the three groups of dosing boxes, the slow flocculation box and the fast flocculation box.

[0024] Preferably, in order to make the overall volume small and the filtering effect better, the flat-plate sludge dewatering machine 2 has the same structure as the flat-plate sludge dewatering machine 1, and both include a dewatering box, a liquid storage chamber is provided on one side of the dewatering box, an overflow notch is provided on the side of the liquid storage chamber for overflowing sewage into the dewatering box, a mud cake funnel is provided on the side of the dewatering box away from the liquid storage chamber, and a solid-liquid separation device is provided in the dewatering box to separate the dewatering box into two layers, the solid-liquid separation device includes more than one steel sheet extending along the length direction of the dewatering box and a sludge pushing mechanism, a flow channel connected to the lower layer of the dewatering box is provided between two adjacent steel sheets, and the sludge pushing mechanism includes more than one group of sludge pushing components and a driving mechanism for each group The sludge pushing components are synchronously working with a reduction motor, and each group of sludge pushing components includes a sludge transmission shaft rotatably connected to the dewatering box and more than one elliptical stainless steel rotating plate that is spaced apart and sleeved on the sludge transmission shaft. Each elliptical stainless steel rotating plate is rotatably inserted in a corresponding flow channel, and each group of sludge pushing components rotates alternately to form a wave-shaped pushing mechanism. The output shaft of the reduction motor is connected to a transmission main shaft rotatably connected to the dewatering box, a transmission main gear is fixed on the transmission main shaft, and a plurality of synchronous gears rotate in the dewatering box. A transmission auxiliary gear is arranged at one end of the sludge transmission shaft, and a closed-loop chain is meshed between all the transmission auxiliary gears, the synchronous gears, and the transmission main gears.

[0025] Preferably, the filtration accuracy of the flat plate sludge dewatering machine 2 is higher than the filtration accuracy of the flat plate sludge dewatering machine 1.

[0026] Preferably, to facilitate later maintenance, an isolation chamber is provided in front of the dehydration box, a controller is provided in the isolation chamber, and the synchronous gear is provided in the isolation chamber.

[0027] Preferably, in order to achieve a guiding effect, two guide wheels are further provided in the isolation chamber, and the chain is rotatably connected to the guide wheels.

[0028] The present invention has the following beneficial effects:

[0029] 1. This structure uses two flat plates with multiple sets of elliptical stainless steel rotating pieces to transport solid waste, ensuring that the overall structure is simpler and easier to clean and maintain in the later stage;

[0030] 2. Only one oil-water separation chamber 2 is used, and multiple sets of acrylic rollers (acrylic roller oil-water separation equipment previously applied for by our company) are added in the oil-water separation chamber 2 to separate oil and water, so the structure is more compact;

[0031] 3. The dosing method is to first add NaOH to adjust the pH value of the liquid, and then add iron sulfate PFS and flocculant PAM in sequence to further improve the flocculation effect;

[0032] 4. The later filters use two sets of bag filters 7, which are lower in cost and more environmentally friendly;

[0033] 5. At the same time, the original spiral stacking machine is replaced by a flat-plate sludge dewatering machine 28, which makes the equipment smaller and has a larger processing capacity. In addition, the entire process method cooperates with each other, which has a better and faster sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of a process flow of a mobile vehicle-mounted oil-water separation method in Example 1;

[0035] Figure 2 A top plan view of a mobile vehicle-mounted oil-water separation sewage treatment system in Example 1;

[0036] Figure 3 It is a structural stereoscopic reference diagram of the flat-plate sludge dewatering machine 1 in Example 1;

[0037] Figure 4 for Figure 3 A magnified image of point A;

[0038] Figure 5 This is a front view of the flat-plate sludge dewatering machine in Example 1 without a cabinet door installed;

[0039] Figure 6 This is a schematic diagram of the connection between the reduction motor and the transmission main shaft in Example 1;

[0040] Figure 7 This is a schematic diagram of the structure of a group of sludge pushing components in Example 1;

[0041] Figure 8 This is a front reference schematic diagram of the combination of the steel sheet and each sludge pushing component in Example 1;

[0042] Fig. 9 It is a schematic diagram of the top view of the structure of the combination of two steel sheets and an elliptical stainless steel rotating sheet in Example 1;

[0043] Fig.10 for Fig. 9 Enlarged view of point B in .

[0044] Reference numerals:

[0045] Flat sludge dewatering machine 1, oil-water separation chamber 2, oil tank 3, fast flocculation tank 4, overflow port 401, slow flocculation tank 5, self-cleaning filter 6, bag filter 7, flat sludge dewatering machine 2 8, buffer tank 9, clean water tank 10, drain outlet 101, garbage bin 1 11, garbage bin 2 12, NaOH dosing box 13, PFS dosing box 14, PAM dosing box 15, connecting pipe 1 16, water supply pump 2 17, water supply pump 1 18, connecting pipe 2 19, water supply pump 3 20, dosing pump 21, stirring device 22, acrylic roller 23, oil guide groove 24, pipe 3 25, box 26, large placement bin 261. Small installation bin one 262. Small installation bin two 263. Small installation bin three 264. Sewage suction pump 27. Control cabinet 28. High-pressure spray gun 29. Dewatering tank 801. Liquid storage chamber 802. Overflow notch 803. Mud cake funnel 804. Steel sheet 805. Speed ​​reducer motor 806. Sludge pushing assembly 807. Sludge transmission shaft 8071. Oval stainless steel rotating sheet 8072. Flow channel 808. Transmission main shaft 809. Transmission main gear 810. Transmission auxiliary gear 811. Synchronous gear 812. Chain 813. Isolation chamber 8011. Guide wheel 8012. Controller 8013. Cabinet door 8014. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Example 1

[0048] See also Figure 1 As shown, this embodiment discloses a mobile vehicle-mounted oil-water separation method, which includes: a flat plate conveying solid-liquid separation process 1, a rapid flocculation process, a slow flocculation process, a self-cleaning filtration process, two groups of bag filtration processes, a flat plate conveying solid-liquid separation process 2, a buffering process, a clean water storage and overflow discharge process, and multiple groups of dosing processes. The specific steps are as follows:

[0049] S1. The sewage mixture to be treated is sucked into the flat plate conveying type solid-liquid separation process 1 through a sewage suction pump, and the sewage mixture is subjected to a first-level solid-liquid separation by the flat plate conveying type solid-liquid separation process 1, thereby obtaining a first-level oil-water mixture and a first-level solid residue, and the generated first-level solid residue is sent to a garbage bin 11; the first-level oil-water mixture is placed in a volume of a set depth, so that the first-level oil-water mixture can obtain an oil layer and a first-level filtrate in a layered manner based on the density difference between oil and liquid, and the first-level filtrate is pumped into the rapid flocculation process through a water supply pump 18;

[0050] S2. In the rapid flocculation process, alkali solution is first added to adjust the pH value of the first-stage filtrate, and then iron sulfate PFS and flocculant PAM are added in sequence, and the stirrer is used to rotate at high speed to achieve rapid flocculation. The upper layer of flocculated liquid overflows into the slow flocculation process;

[0051] S3, in the slow flocculation process, slow flocculation is performed, and the upper layer liquid after slow flocculation is extracted by the water supply pump 2 17 and then passes through the self-cleaning filtration process and one group of bag filtration processes for secondary filtration, and finally the qualified water is stored in the clean water storage and overflow discharge process;

[0052] S4, the sewage residue generated by backwashing during the self-cleaning filtration process enters the flat conveying solid-liquid separation process 2 to achieve secondary solid-liquid separation, and thereby obtains the second-stage filtrate and the second-stage solid residue, the filtered second-stage filtrate enters the buffer process, and the generated second-stage solid residue is sent to the garbage bin 2 12;

[0053] S5, the water in the buffer tank 9 is pumped out by the water supply pump 3 20 and sent to another set of bag filter process for filtration, and then sent to the clean water storage and overflow discharge process for storage;

[0054] S6. Water in the clean water storage and overflow discharge process can be discharged directly.

[0055] Preferably, in order to achieve oil-water separation, several groups of oil-water separation processes using acrylic rollers 23 are added to the flat plate conveying solid-liquid separation process 1 in step S1 to separate the oil layer and the first-stage filtrate, and the separated oil is sent to the oil tank 3.

[0056] Preferably, in order to improve the filtering effect, the filtering accuracy in the first flat plate conveying type solid-liquid separation step is 0.1-0.3 mm, and the filtering accuracy in the second flat plate conveying type solid-liquid separation step is 0.05-0.2 mm.

[0057] Preferably, in order to improve the filtering effect, the filtering accuracy of one set of self-cleaning filtering process is 100 μm, and the filtering accuracy of two sets of bag filtering processes is 5 μm.

[0058] like Figure 2 As shown, the present embodiment also discloses a mobile vehicle-mounted oil-water separation sewage treatment system, comprising a main body arranged on a vehicle body, wherein the main body comprises a flat-plate sludge dehydrator 1, an oil-water separation chamber 2, an oil tank 3, a fast flocculation tank 4, a slow flocculation tank 5, a self-cleaning filter 6, two groups of bag filters 7, a flat-plate sludge dehydrator 2 8, a buffer tank 9, a clear water tank 10, a garbage bin 1 11, a garbage bin 2 12 and three groups of dosing boxes, wherein the flat-plate sludge dehydrator 1 is located above the oil-water separation chamber 2, and The bottom of the flat sludge dewatering machine 1 is connected to the oil-water separation chamber 2. A plurality of acrylic rollers 23 for scraping the upper floating oil are arranged above the oil-water separation chamber 2. The acrylic rollers 23 are provided with oil guide grooves 24 for collecting oil on the side. The other end of the oil guide grooves 24 is connected to the oil tank 3. The oil-water separation chamber 2 is connected to the rapid flocculation tank 4 through the water supply pump 18. The three groups of dosing boxes are respectively the NaOH dosing box 13, the PFS dosing box 14 and the PAM dosing box 15. The output of the medicine box is respectively connected to the fast flocculation box 4 for adding medicine to the fast flocculation box; the fast flocculation box 4 is connected to the slow flocculation box 5 through the overflow port 401 and the connecting pipe 16, and the slow flocculation box 5 is used to realize the slow flocculation of the sewage after the fast completion. The output of the slow flocculation box 5 is connected to the liquid inlet of the self-cleaning filter 6 through the water supply pump 2 17, and the liquid outlet of the self-cleaning filter 6 is connected to the liquid inlet of a group of bag filters 7 through the connecting pipe 2 19, and the group of bag filters 7 is connected to the liquid inlet of the bag filters 7. The liquid outlet of the filter 7 is connected to the clean water tank 10, and a drain outlet 101 is provided on the side of the clean water tank 10. The slag outlet of the self-cleaning filter 6 is connected to the inlet of the flat-plate sludge dewatering machine 8. The slag outlet of the flat-plate sludge dewatering machine 8 is connected to the garbage bin 12. The liquid outlet of the flat-plate sludge dewatering machine 8 is connected to the buffer tank 9. The output port of the buffer tank 9 is sent to another group of bag filters 7 for filtration through a water supply pump 3 20. The filtered clean water is sent to the clean water tank 10 through a pipe 3 25.

[0059] In this embodiment, the main body also includes a box body 26, and a partition is arranged in the box body 26. The partition separates the box body 26 into an oil-water separation chamber 2, a fast flocculation chamber 4, a slow flocculation chamber 5, three dosing chambers, a buffer tank 9, a clear water tank 10, a large placement chamber 261, a small installation chamber 1 262, a small installation chamber 2 263 and a small installation chamber 3 264. A flat-plate sludge dehydrator 1 is placed on the upper left side of the oil-water separation chamber 2, and four sets of rotatable The acrylic roller 23 rotates, a buffer tank 9 is arranged on the right side of the oil-water separation chamber 2, a clean water tank 10 is arranged behind the buffer tank 9, a large placement chamber 261 is located on the right side of the buffer tank 9 and the clean water tank 10, a bag filter 7, a self-cleaning filter 6, a dosing pump 21 and all water supply pumps are placed in the large placement chamber 261, and the flat-plate sludge dewatering machine 28 is placed above the buffer tank 9, a fast flocculation box 4 and a slow flocculation box 5 are arranged at the front end of the oil-water separation chamber 2, and a slow flocculation box 5 is arranged at the front end of the oil-water separation chamber 2. The three dosing boxes are arranged on the right side of the box 5, the small installation warehouse 263 is located on the left side of the rapid flocculation box 4, a detachable garbage bin 11 is placed in the small installation warehouse 263, and a sewage suction pump 27 for pumping sludge into the flat-plate sludge dewatering machine 1 is fixed, the small installation warehouse 262 is located behind the oil-water separation warehouse 2, and is used to place another bag filter 7 inside, and a small installation warehouse 3 264 is arranged on the left side of the small installation warehouse 262, a detachable oil tank 3 is placed in the small installation warehouse 3 264, and a control cabinet 28 for controlling the operation of the entire equipment is fixed, a spacing is arranged between the clean water tank 10 and the large placement warehouse 261, the garbage bin 2 12 is movably placed in the spacing between the clean water tank 10 and the large placement warehouse 261, and the entire box body 26 is installed on the vehicle body 1 to realize the vehicle-borne oil-water separation function, and in order to realize road cleaning in the later stage, a high-pressure spray gun 29 connected to the drain outlet 101 is also arranged in the large placement warehouse 261.

[0060] Preferably, in order to improve the drug mixing effect, the output ends of the three groups of drug adding boxes are each provided with a drug adding pump 21, and the three groups of drug adding boxes, the slow flocculation box 5, and the fast flocculation box 4 are each provided with a stirring device 22. In this embodiment, the rapid drug delivery is improved by adding the drug adding pump 21, and at the same time, by arranging the existing stirring device 22 in the three groups of drug adding boxes, the corresponding drugs and water can be quickly mixed and dissolved, and the existing stirring device 22 is arranged in the slow flocculation box 5 and the fast flocculation box 4 to achieve rapid dissolution and mixing of sewage and drugs when adding drugs, thereby further accelerating the flocculation effect.

[0061] like Figure 3-10As shown, as a preferred embodiment, in order to make the overall volume small and the filtering effect better, the flat-plate sludge dewatering machine 28 has the same structure as the flat-plate sludge dewatering machine 1, and both include a dewatering box 801, a liquid storage chamber 802 is provided on one side of the dewatering box 801, and an overflow notch 803 is provided on the side of the liquid storage chamber 802 for overflowing sewage into the dewatering box 801, a mud cake funnel 804 is provided on the side of the dewatering box 801 away from the liquid storage chamber 802, and a dewatering box 801 is provided with a dewatering box 801 to separate the dewatering box 801 into two layers, an upper layer and an lower layer. The solid-liquid separation device comprises one or more steel sheets 805 extending along the length direction of the dewatering box 801 and a sludge pushing mechanism. A flow passage 808 communicating with the lower layer of the dewatering box 801 is provided between two adjacent steel sheets 805. The sludge pushing mechanism comprises one or more sludge pushing components 807 and a reduction motor 806 driving each group of sludge pushing components 807 to work synchronously. Each group of sludge pushing components 807 comprises a sludge transmission shaft 8071 rotatably connected to the dewatering box 801 and a The elliptical stainless steel rotating pieces 8072 are arranged on the sludge transmission shaft 8071 at intervals, and each elliptical stainless steel rotating piece 8072 is rotatably inserted in a corresponding flow channel 808. Each group of sludge pushing components 807 rotates alternately to form a wave-shaped pushing mechanism. The output shaft of the reduction motor 806 is connected to a transmission main shaft 809 rotatably connected to the dewatering box 801. A transmission main gear 810 is fixed on the transmission main shaft 809. A plurality of synchronous gears 812 rotate in the dewatering box 801. A transmission auxiliary gear 811 is provided at one end of the sludge transmission shaft 8071, and a closed-loop chain 813 is meshed between all the transmission auxiliary gears 811, the synchronous gear 812, and the transmission main gear 810. In this embodiment, this structure is only arranged by adopting a plurality of steel sheets 805 and arranging a plurality of groups of sludge pushing mechanisms between the steel sheets for synchronous rotation, so that the sludge can be quickly transported and the sludge can be prevented from falling under the dewatering box 801. The overall structure is simpler and has relatively fewer components, so the overall volume can be made smaller.

[0062] Preferably, the filtration accuracy of the flat-plate sludge dewatering machine 8 is higher than that of the flat-plate sludge dewatering machine 1; in order to facilitate later maintenance, an isolation chamber 8011 is provided in front of the dewatering box 801, and a cabinet door 8014 is hinged on the side of the isolation chamber 8011. A controller 8013 is provided in the isolation chamber 8011, and the synchronous gear 812 is provided in the isolation chamber 8011; preferably, in order to achieve a guiding effect, two guide wheels 8012 are also provided in the isolation chamber 8011, and the chain 813 is rotatably connected to the guide wheel 8012. In this embodiment, there are two synchronous gears 812, which are distributed on the left and right. After one end of the sludge transmission shaft 8071 is inserted into the isolation chamber 8011, a transmission auxiliary gear 811 is connected. The controller 8013 is later connected to the dewatering box 8011. The reduction motor 806 is connected to the control cabinet 28; when working, the reduction motor 806 works to drive the transmission main shaft 809 to rotate, which drives the transmission main gear 810 to rotate. Under the action of the chain 813, the synchronous gear 812 finally drives the various transmission auxiliary gears 811 to rotate synchronously, and finally drives all the sludge transmission shafts 8071 to rotate synchronously, thereby driving the elliptical stainless steel rotating pieces 8072 on the sludge transmission shaft 8071 to rotate synchronously, and finally filters the liquid to the bottom of the dewatering box 801, and the solid is sent to the outside of the mud cake funnel 804 after dehydration, and finally enters the garbage bin 11; and it should be noted that the spacing between two adjacent elliptical stainless steel rotating pieces 8072 on a sludge transmission shaft 8071 needs to ensure that the steel sheet 805 can be inserted, so as to realize a structure in which a steel sheet 805 is inserted between each two adjacent elliptical stainless steel rotating pieces 8072.

[0063] like Figure 9-10 As shown, as a preferred embodiment, in order to ensure a better solid-liquid separation effect, taking the flat plate sludge dewatering machine 1 as an example, the gap width between the two side surfaces of each elliptical stainless steel rotating sheet 8072 on the flat plate sludge dewatering machine 1 and a corresponding flow channel 808 is 0.1-0.3mm, so the distance H11mm between the steel sheets 805 and 805, the width H2 of the elliptical stainless steel rotating sheet 8072 is 0.5mm, so the calculation formula of the filtration accuracy H3 (that is, the gap width between the two side surfaces of each elliptical stainless steel rotating sheet 8072 and a corresponding flow channel 808) is as follows: H3 = (H1-H2) / 2 = 0.25mm, and considering that the filtration accuracy of the flat plate sludge dewatering machine 28 is less than the filtration accuracy of the flat plate sludge dewatering machine 1, as shown in FIG. Figure 3-Figure 6 As shown, the filtration accuracy H3 value on the flat plate sludge dewatering machine 28 can be set in the above manner.

[0064] In this embodiment, there are 6 groups of sludge pushing components 807 to ensure more compact transmission. In this embodiment, due to the simple structure, the gap width between the two sides of each elliptical stainless steel rotating sheet 8072 and a corresponding flow channel 808 can be set within 0.1-0.3mm, and the filtration accuracy can be controlled within 0.2mm, so that the effluent water quality is more stable and the solid-liquid separation effect is better. In addition, multiple groups of sludge pushing components 807 use a reduction motor 806 to cooperate with the transmission main shaft 809, the transmission main gear 810, The transmission auxiliary gear 811 and the chain 813 ensure the synchronization and coordination between the elliptical stainless steel rotating plates 8072 to prevent solid residues from falling through the gap to the lower part and affecting the subsequent liquid cleaning effect. In this embodiment, the size of the entire dewatering box 801 can be 0.87*0.43*0.38 (unit: m) in length, width and height, making the overall volume more compact and the processing capacity can reach 20 tons per hour. At the same time, only a 90-watt reduction motor 806 is used, so the power consumption is relatively lower; while the ordinary screw stacking machine consumes more energy of several kilowatts.

[0065] The specific working principle of the present invention is as follows: the sewage mixture to be treated is sucked into the flat-plate sludge dewatering machine 1 through the sewage suction pump 27, that is, enters the liquid storage chamber 802, and overflows into the dewatering box 801 through the overflow gap 803 to achieve early buffering, and then the liquid in the sludge flows into the lower layer of the dewatering box 801 through the flow channel 808 between the two steel sheets 805. At this time, due to the synchronous rotation of multiple groups of sludge pushing mechanisms, the solid sludge is slowly transported from the liquid storage chamber 802 to the mud cake funnel 4, and the solid sludge passes through the mud. The cake funnel 4 enters the trash bin 11 for storage. The trash bin 11 can be cleaned regularly later, and the liquid in the lower layer of the dehydration tank 801 flows into the oil-water separation bin 2. The oil floats on the top, and then multiple sets of rotating acrylic rollers 23 are used to scrape the floating oil on the upper layer and send it through the oil guide groove 24 to the oil tank 3 for storage. The oil tank 3 can be cleaned regularly, and the liquid below is pumped into the rapid flocculation tank 4 through the water supply pump 18; first add NaOH to the rapid flocculation tank 4 to adjust the pH value of the liquid, and then Ferrous sulfate PFS and flocculant PAM are added to the rapid flocculation tank 4 in sequence, and the stirring device 22 is used to rotate and stir at high speed to achieve rapid flocculation. The upper layer of liquid after flocculation overflows into the slow flocculation tank 5 for slow flocculation. The upper layer of liquid after slow flocculation is extracted by the water supply pump 2 17 and filtered through the self-cleaning filter 6 in sequence, and then enters a group of bag filters 7 for secondary filtration, and finally obtains qualified water, which is then stored in the clean water tank 10; the sewage residue generated by backwashing the self-cleaning filter 6 enters the flat sludge dewatering machine 2 8 to achieve secondary solid-liquid separation, and thereby obtains the second-stage filtrate and the second-stage solid residue, the filtered second-stage filtrate enters the buffer tank 9, and the generated second-stage solid residue is sent to the garbage bin 2 12, and the water in the buffer tank 9 is extracted by the water supply pump 3 20 and sent to another group of bag filters 7 for filtration, and then sent to the clean water storage and overflow discharge process for storage, and the water in the clean water tank 10 can be discharged directly, so the following technical effects are achieved by the present invention:

[0066] This structure uses two flat plates with multiple sets of elliptical stainless steel rotating plates to transport solid waste, ensuring that the overall structure is simpler and easier to clean and maintain later;

[0067] Only one oil-water separation chamber 2 is used, and multiple groups of acrylic rollers (acrylic roller oil-water separation equipment previously applied for by the company) are added in the oil-water separation chamber 2 to separate the oil and water, so the structure is more compact;

[0068] The dosing method is to first add NaOH to adjust the pH value of the liquid, and then add iron sulfate PFS and flocculant PAM in sequence to further improve the flocculation effect;

[0069] The later filters use two sets of bag filters 7, which are lower in cost and more environmentally friendly;

[0070] At the same time, the original screw stacking machine was replaced by a flat-plate sludge dewatering machine 28, making the equipment smaller and more compact, with a larger processing capacity. Moreover, the entire process method cooperates with each other, which has a better and faster sewage treatment effect.

[0071] It should be noted that in this embodiment, the self-cleaning filter 6, two sets of bag filters 7, stirring device 22, acrylic roller 23, pipeline three 25, control cabinet 28, high-pressure spray gun 29, reduction motor 806, and controller 8013 are all prior arts, and how the control cabinet 28 controls the operation of each electrical equipment belongs to the conventional technology in this field, so it will not be described in detail.

[0072] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments, any equivalent replacement of some of the technical features therein, and any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. A mobile vehicle-mounted oil-water separation method, characterized in that: The method comprises: a flat plate conveying solid-liquid separation process 1, a rapid flocculation process, a slow flocculation process, a self-cleaning filtration process, two groups of bag filtration processes, a flat plate conveying solid-liquid separation process 2, a buffer process, a clean water storage and overflow discharge process, and multiple groups of dosing processes. The specific steps are as follows: S1. The sewage mixture to be treated is sucked into the flat plate conveying type solid-liquid separation process one through a sewage suction pump, and the sewage mixture is subjected to a first-level solid-liquid separation by the flat plate conveying type solid-liquid separation process one, thereby obtaining a first-level oil-water mixture and a first-level solid residue, and the generated first-level solid residue is sent to a garbage bin one (11); the first-level oil-water mixture is placed in a volume of a set depth, so that the first-level oil-water mixture can obtain an oil layer and a first-level filtrate in a layered manner based on the density difference between oil and liquid, and the first-level filtrate is pumped into the rapid flocculation process through a water supply pump one (18); S2. In the rapid flocculation process, alkali solution is first added to adjust the pH value of the first-stage filtrate, and then iron sulfate PFS and flocculant PAM are added in sequence, and the stirrer is used to rotate at high speed to achieve rapid flocculation. The upper layer of flocculated liquid overflows into the slow flocculation process; S3, slow flocculation is performed in the slow flocculation process, and the upper layer liquid after the slow flocculation is extracted by the water supply pump 2 (17) and then passes through the self-cleaning filtration process and one group of bag filtration processes for secondary filtration, and finally the qualified water is stored in the clean water storage and overflow discharge process; S4, the sewage residue generated by backwashing during the self-cleaning filtration process enters the flat plate conveying type solid-liquid separation process 2 to achieve secondary solid-liquid separation, thereby obtaining a second-stage filtrate and a second-stage solid residue, the filtered second-stage filtrate enters the buffer process, and the generated second-stage solid residue is sent to the garbage bin 2 (12); S5, the water in the buffer tank (9) is pumped out by the water supply pump 3 (20) and sent to another set of bag filter process for filtration, and then sent to the clean water storage and overflow discharge process for storage and overflow discharge; S6. Water in the clean water storage and overflow discharge process can be discharged directly.

2. A mobile vehicle-mounted oil-water separation method according to claim 1, characterized in that: In the flat plate conveying type solid-liquid separation process 1 of step S1, several groups of oil-water separation processes using acrylic rollers for oil-water separation are added to separate the oil layer and the first-stage filtrate, and the separated oil is sent to the oil tank (3).

3. A mobile vehicle-mounted oil-water separation method according to claim 1, characterized in that: The filtration accuracy in the first flat plate conveying type solid-liquid separation process is 0.1-0.3 mm, and the filtration accuracy in the second flat plate conveying type solid-liquid separation process is 0.05-0.2 mm.

4. A mobile vehicle-mounted oil-water separation method according to claim 1, characterized in that: The filtration accuracy of one set of self-cleaning filtration process is 100μm, and the filtration accuracy of two sets of bag filtration processes is 5μm.

5. A mobile vehicle-mounted oil-water separation sewage treatment system, characterized in that: The vehicle comprises a main body arranged on a vehicle body, wherein the main body comprises a flat plate type sludge dewatering machine (1), an oil-water separation chamber (2), an oil tank (3), a fast flocculation chamber (4), a slow flocculation chamber (5), a self-cleaning filter (6), two groups of bag filters (7), a flat plate type sludge dewatering machine (8), a buffer tank (9), a clean water tank (10), a first garbage bin (11), a second garbage bin (12) and three groups of dosing tanks, wherein the first flat plate type sludge dewatering machine (1) is located above the oil-water separation chamber (2), and the bottom of the first flat plate type sludge dewatering machine (1) is connected to the oil-water separation chamber (2). The oil-water separation chamber (2) is connected to the oil-water separation chamber (2), and a plurality of groups of acrylic rollers (23) are arranged above the oil-water separation chamber (2) for scraping off the oil floating on the upper layer. The side of the acrylic roller (23) is provided with an oil guide groove (24) for collecting the oil, and the other end of the oil guide groove (24) is connected to the oil tank (3). The oil-water separation chamber (2) is connected to the rapid flocculation tank (4) through a water supply pump (18). The three groups of drug adding boxes are respectively a NaOH drug adding box (13), a PFS drug adding box (14) and a PAM drug adding box (15), and the three groups The output of the dosing box is respectively connected to the fast flocculation box (4) for dosing the fast flocculation box; the fast flocculation box (4) is connected to the slow flocculation box (5) through the overflow port (401) and the connecting pipe 1 (16); the output of the slow flocculation box (5) is connected to the liquid inlet of the self-cleaning filter (6) through the water supply pump 2 (17); the liquid outlet of the self-cleaning filter (6) is connected to the liquid inlet of a group of bag filters (7) through the connecting pipe 2 (19); and the liquid outlet of the group of bag filters (7) is connected to the clean water tank (1 0), a drain outlet (101) is arranged on the side of the clean water tank (10), the slag outlet of the self-cleaning filter (6) is connected to the inlet of the flat plate type sludge dewatering machine (8), the slag outlet of the flat plate type sludge dewatering machine (8) is connected to the garbage bin (12), the liquid outlet of the flat plate type sludge dewatering machine (8) is connected to the buffer tank (9), the output outlet of the buffer tank (9) is sent to another group of bag filters (7) for filtration through the water supply pump (20), and the clean water after filtration is sent to the clean water tank (10) through the pipeline (25).

6. A mobile vehicle-mounted oil-water separation sewage treatment system according to claim 5, characterized in that: The output ends of the three groups of dosing boxes are all provided with a dosing pump (21), and the three groups of dosing boxes, the slow flocculation box (5) and the fast flocculation box (4) are all provided with a stirring device (22).

7. A mobile vehicle-mounted oil-water separation sewage treatment system according to claim 5, characterized in that: The flat plate type sludge dewatering machine 2 (8) has the same structure as the flat plate type sludge dewatering machine 1 (1), and both include a dewatering box (801). A liquid storage chamber (802) is provided on one side of the dewatering box (801). An overflow notch (803) is provided on the side of the liquid storage chamber (802) for allowing sewage to overflow into the dewatering box (801). A mud cake funnel (804) is provided on the side of the dewatering box (801) away from the liquid storage chamber (802). A dewatering box (801) is provided with a dewatering notch (803) for allowing sewage to overflow into the dewatering box (801). The dewatering box (801) is separated into two layers, the solid-liquid separation device comprises one or more steel sheets (805) extending along the length direction of the dewatering box (801) and a sludge pushing mechanism, a flow passage (808) communicating with the lower layer of the dewatering box (801) is arranged between two adjacent steel sheets (805), the sludge pushing mechanism comprises one or more sludge pushing components (807) and a reduction motor (806) driving each group of sludge pushing components (807) to work synchronously, Each group of sludge pushing components (807) includes a sludge transmission shaft (8071) rotatably connected to the dewatering box (801) and more than one elliptical stainless steel rotating sheet (8072) spaced apart and sleeved on the sludge transmission shaft (8071). Each elliptical stainless steel rotating sheet (8072) is rotatably inserted into a corresponding flow passage (808). Each group of sludge pushing components (807) rotates alternately to form a wave-shaped pushing mechanism. The reduction motor (806) The output shaft is connected to a transmission main shaft (809) rotatably connected to the dewatering box (801); a transmission main gear (810) is fixed on the transmission main shaft (809); a plurality of synchronous gears (812) rotate in the dewatering box (801); a transmission auxiliary gear (811) is arranged at one end of the sludge transmission shaft (8071); a closed-loop chain (813) is meshed between all the transmission auxiliary gears (811), the synchronous gears (812) and the transmission main gear (810).

8. A mobile vehicle-mounted oil-water separation sewage treatment system according to claim 7, characterized in that: The filtering accuracy of the flat plate type sludge dewatering machine 2 (8) is higher than the filtering accuracy of the flat plate type sludge dewatering machine 1 (1).

9. The mobile vehicle-mounted oil-water separation sewage treatment system according to claim 7 is characterized by: An isolation chamber (8011) is arranged in front of the dehydration box (801), a controller (8013) is arranged in the isolation chamber (8011), and the synchronous gear (812) is arranged in the isolation chamber (8011).

10. A flat plate type sludge dewatering machine according to claim 9, characterized in that: Two guide wheels (8012) are also provided in the isolation chamber (8011), and the chain (813) is rotatably connected to the guide wheels (8012).

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