A coagulation pretreatment device for a diafiltration membrane concentrate

Abstract

The application discloses a kind of coagulation pretreatment equipment of diafiltration membrane concentrate, including water inlet main pipeline, filter device, sedimentation tank, dosing device and flocculation tank, the equipment further includes electric control four-way ball valve, several water inlet branch pipes, the water inlet branch pipe one end electric control four-way ball valve is connected, the other end extends to sedimentation tank, first screen is arranged in the middle section of water inlet branch pipe, and reverse flushing branch pipe is communicated and arranged on the side of first screen towards sedimentation tank, and first screen is communicated and arranged on the side of first screen towards electric control four-way ball valve with residue discharge branch pipe;Filter device includes backflushing pump, backflushing water tank, residue collecting tank, and first electric control butterfly valve and second electric control butterfly valve for opening and closing backflushing branch pipe and residue discharge branch pipe, electric control four-way ball valve and the first electric control butterfly valve of each water inlet branch pipe, second electric control butterfly valve signal linkage, periodically input waste water to one water inlet branch pipe, and control the first electric control butterfly valve and second electric control butterfly valve of remaining water inlet branch pipe open, and backflushing pump extracts backflushing water tank liquid and impacts the intercepted object on first screen to residue collecting tank.

Description

TECHNICAL FIELD

[0001] The utility model relates to garbage incineration technical field, concretely relates to a kind of percolation membrane concentrated liquid coagulation pretreatment equipment. BACKGROUND

[0002] A large amount of wastewater is generated in the process of garbage incineration. After preliminary treatment, a substance called percolation membrane concentrated liquid is generated. Percolation membrane concentrated liquid contains a large amount of organic pollutants, heavy metals and other substances. The presence of these substances poses a serious threat to the environment and ecology.

[0003] Single wastewater treatment method often fails to achieve ideal treatment effect when facing complex pollutants such as percolation membrane concentrated liquid. These pollutants are not only diverse in type, but also high in concentration, making treatment difficult. In order to more effectively treat these pollutants, reduce treatment difficulty and improve treatment efficiency, this project proposes to design a coagulation pretreatment process. By adding an appropriate amount of coagulant, part of the pollutants in percolation membrane concentrated liquid are coagulated into larger particles, which are then separated from wastewater by solid-liquid separation technology. In this way, the concentration of pollutants in percolation membrane concentrated liquid can be effectively reduced, creating more favorable conditions for subsequent treatment processes.

[0004] However, there are problems: 1. Factory wastewater continuously enters the flocculation equipment, resulting in dynamic waste liquid capacity in the flocculation zone. At this time, the coagulant cannot be effectively controlled, resulting in insufficient flocculation effect or excessive cost increase. 2. Factory wastewater often carries a large amount of solid pollutants such as residues. If not filtered first, it will seriously affect the subsequent flocculation effect. However, traditional filtration and sedimentation cannot clean the residues in time, limiting the wastewater treatment capacity.

[0005] Therefore, it is necessary to design a coagulation pretreatment equipment that can filter and discharge residues for real-time input of wastewater, and accurately dose, which can significantly improve wastewater treatment efficiency and reduce dosing cost. UTILITY MODEL CONTENT

[0006] The utility model provides a kind of percolation membrane concentrated liquid coagulation pretreatment equipment to solve the technical deficiency of the above.

[0007] Further settings of the utility model: a kind of percolation membrane concentrated liquid coagulation pretreatment equipment, including water inlet main pipeline, filter device, sedimentation tank, dosing device and flocculation tank, the equipment further includes electric control four-way ball valve, several water inlet branch pipes, the water inlet branch pipe one end electric control four-way ball valve is connected, the other end extends to sedimentation tank, first screen is arranged in the middle of water inlet branch pipe, and backflush branch pipe is communicated and arranged on the side of first screen towards sedimentation tank, and discharge residue branch pipe is communicated and arranged on the side of first screen towards electric control four-way ball valve;

[0008] The filter device comprises a backflushing water pump, a backflushing water tank, a slag collecting tank, a first electric control butterfly valve and a second electric control butterfly valve for opening and closing a backflushing branch pipe and a slag discharging branch pipe, the electric control four-way ball valve is signal-linked with the first electric control butterfly valve and the second electric control butterfly valve of each water inlet branch pipe, waste water is periodically input into one water inlet branch pipe, and the first electric control butterfly valve and the second electric control butterfly valve of the remaining water inlet branch pipes are controlled to be opened, the backflushing water pump draws liquid in the backflushing water tank to impact the intercepted objects on the first filter screen into the slag collecting tank.

[0009] The further setting of the utility model discloses: the dosing device includes water wheel, drive motor, a plurality of water bucket, storage tank, metering pump, dumping top rod and drive cylinder, the retaining wall is arranged between the sedimentation tank and flocculation tank, the retaining wall is provided with the notch that is adapted to the water wheel profile, the water wheel is set in the notch and is rotated with drive motor linkage, the water wheel includes the dumping station at one side of flocculation tank, the water lifting station at one side of sedimentation tank, the dosing station apart from the liquid surface of sedimentation tank, the dosing station, dumping station all are provided with proximity switch, the a plurality of water bucket is equally divided hinge and is set on the water wheel, and the water bucket side is provided with overflow hole, with the water wheel passing through lifting station, dumping station,

[0010] The metering pump is connected with the pipeline of storage tank, is connected with the proximity switch signal of dosing station, and is set in the vertical upper side of dosing station, and the metering pump according to same station proximity switch signal, and the coagulant of preset value is put into the water bucket passing through dosing station,

[0011] The dumping top rod is set in dumping station, and is linked with drive cylinder, and the drive cylinder is driven according to the proximity switch signal of dumping station, and the dumping top rod is turned over the water bucket passing through dumping station, and the liquid in water bucket is guided into flocculation tank.

[0012] The further setting of the utility model discloses: the water bucket is provided with a plurality of overflow holes along the vertical direction, and the water bucket further includes a plurality of plug members, and the water bucket selectively opens the overflow hole.

[0013] The further setting of the utility model discloses: the flocculation tank is provided with stirring shaft, stirring motor, discharge pipe, third electric control butterfly valve, filter branch pipe, filter box and return pipe, the discharge pipe is provided with first inclined discharge port and second inclined discharge port, the first inclined discharge port is provided with second filter screen, the filter branch pipe is respectively connected with first inclined discharge port and filter box at both ends, the return pipe is respectively connected with second inclined discharge port and filter box, and the filter box is provided with third filter screen between filter branch pipe and return pipe.

[0014] The utility model discloses beneficial effect has: one, through the design of electric control four-way ball valve and multiple water inlet branch pipes, the water inlet branch pipe of periodically switching input waste liquid, the water inlet branch pipe of temporarily not inputting waste liquid, such as the description attached Figure 4The PLC controller signal linkage controls the first electric control butterfly valve and the second electric control butterfly valve of the idle water inlet branch to open, the backflushing water pump extracts the liquid in the backflushing water tank to impact the intercepted objects on the first filter screen to the slag collecting tank, and the cleaning work of the first filter screen is completed.

[0015] Then, the first electric control butterfly valve and the second electric control butterfly valve of the cleaned water inlet branch are closed, and the electric control ball valve is controlled to switch, so that the wastewater enters the cleaned water inlet branch.

[0016] II. Through the structural design of the dosing device, the water wheel extracts the supernatant in the sedimentation tank, because of the overflow port design of the water bucket, the water extraction amount of the water bucket is fixed, the dosage can be calculated according to the capacity, and the precise dosing of the metering pump is realized, so that the fluctuation of the total wastewater amount caused by continuous water inflow is avoided, the waste of the dosing amount is avoided, the supernatant extracted by the water bucket also improves the wastewater treatment effect, and after the water bucket adds the coagulant, the impact in the dumping process also promotes the mixing effect of the coagulant.

[0017] III. The stirring shaft of the flocculation tank further strengthens the mixing effect of the coagulant, the designed flocculation pipe way separates the flocculation solid-liquid, the solid is intercepted in the filtering box through the second filter screen and the third filter screen, and the filtering liquid is uniformly discharged through the reflux pipe. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure of the embodiment of the utility model Figure 1 ;

[0019] Figure 2 The structure of the embodiment of the utility model Figure 2 ;

[0020] Figure 3 The structure of the embodiment of the utility model Figure 3 .

[0021] Figure 4 The structure of the embodiment of the utility model Figure 4 ;

[0022] Figure 5 The structure of the embodiment of the utility model Figure 5 .

[0023] Wherein, 11 - water inlet main pipe, 12 - electric control four-way ball valve, 13 - water inlet branch pipe, 14 - first filter screen, 15 - backflush branch pipe, 16 - deslagging branch pipe, 21 - sedimentation tank, 22 - flocculation tank, 23 - retaining wall, 31 - backflush pump, 32 - deslagging tank, 33 - first electric control butterfly valve, 34 - second electric control butterfly valve, 41 - water wheel, 42 - driving motor, 43 - water bucket, 44 - chemical storage tank, 45 - dumping top rod, 46 - driving cylinder, 51 - dumping station, 52 - water lifting station, 53 - chemical dosing station, 61 - stirring shaft, 62 - flocculation pipe, 63 - third electric control butterfly valve, 64 - filtering branch pipe, 65 - filter box, 66 - backflow pipe, 67 - second filter screen, 68 - third filter screen.

[0024] In order to better illustrate the present embodiment, some components in the drawings can be omitted, enlarged or reduced, and do not represent the actual product size. In addition, the drawings are only used for illustrative purposes and cannot be understood as a limitation of the present patent. DETAILED DESCRIPTION

[0025] In order to make the technical solutions of the present application and its advantages clearer, the technical solutions of the present application will be further described in detail below in conjunction with the drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present application, and are only used to explain the present application, but not to limit the present application. It should be noted that, in order to facilitate description, only parts related to the present application are shown in the drawings, and other related parts can be referred to the usual design. In the case of no conflict, the embodiments in the present application and the technical features in the embodiments can be combined to obtain new embodiments.

[0026] The present utility model will be described in detail below in conjunction with the drawings, as shown in Figures 1-5

[0027] A kind of equipment for coagulation pretreatment of diafiltration membrane concentrated solution, including water inlet main pipe 11, filter device, sedimentation tank 21, chemical dosing device and flocculation tank 22, the equipment further include electric control four-way ball valve 12, several water inlet branch pipe 13, the water inlet branch pipe 13 one end electric control four-way ball valve 12 is connected, the other end extends to sedimentation tank 21, first filter screen 14 is arranged in the middle of the water inlet branch pipe 13, and backflush branch pipe 15 is communicated and arranged on the side of first filter screen 14 towards sedimentation tank 21, and deslagging branch pipe 16 is communicated and arranged on the side of first filter screen 14 towards electric control four-way ball valve 12;

[0028] ​The filter device comprises a backwashing water pump 31, a backwashing water tank, a slag collecting tank 32, and first and second electrically controlled butterfly valves 33 and 34 for opening and closing the backwashing branch pipe 15 and the slag discharging branch pipe 16, the electrically controlled four-way ball valve 12 is signal-linked with the first and second electrically controlled butterfly valves 33 and 34 of each water inlet branch pipe 13, waste water is periodically input into one of the water inlet branch pipes 13, and the first and second electrically controlled butterfly valves 33 and 34 of the remaining water inlet branch pipes 13 are controlled to be opened, the backwashing water pump 31 extracts liquid in the backwashing water tank to impact the intercepted objects on the first filter screen 14 into the slag collecting tank 32.

[0029] The dosing device comprises a water wheel 41, a driving motor 42, a plurality of water buckets 43, a medicine storage tank 44, a metering pump, a dumping top rod 45, and a driving cylinder 46, a retaining wall 23 is arranged between the sedimentation tank 21 and the flocculation tank 22, the retaining wall 23 is provided with a gap matched with the profile of the water wheel 41, the water wheel 41 is arranged at the gap and rotationally linked with the driving motor 42, the water wheel 41 comprises a dumping station 51 on one side of the flocculation tank 22, a water lifting station 52 on one side of the sedimentation tank 21, and a medicine dosing station 53 away from the liquid surface of the sedimentation tank 21, the medicine dosing station 53 and the dumping station 51 are each provided with a proximity switch, the plurality of water buckets 43 are equally arranged on the water wheel 41 and pass through the lifting station and the dumping station 51 along with the water wheel 41, and the water bucket 43 is provided with overflow holes 431 on the side surface thereof;

[0030] The metering pump is in pipeline communication with the medicine storage tank 44 and signal connection with the proximity switch of the medicine dosing station 53, and is arranged vertically above the medicine dosing station 53, the metering pump doses a preset amount of coagulant into the water bucket 43 passing through the medicine dosing station 53 according to the proximity switch signal of the same station;

[0031] The dumping top rod 45 is arranged at the dumping station 51 and is linked with the driving cylinder 46, the driving cylinder 46 drives the dumping top rod 45 to tip over the water bucket 43 passing through the dumping station 51 according to the proximity switch signal of the dumping station 51, and drives the liquid in the water bucket 43 to flow into the flocculation tank 22.

[0032] The water bucket 43 is provided with a plurality of overflow holes 431 in the vertical direction, and comprises a plurality of plug members, and the water bucket 43 selectively opens the overflow holes 431.

[0033] The flocculation tank 22 is provided with a stirring shaft 61, a stirring motor, a flocculation discharging pipeline 62, a third electrically controlled butterfly valve 63, a filtering branch pipe 64, a filtering tank 65, and a backflow pipe 66, the flocculation discharging pipeline 62 is provided with first and second inclined discharging openings, the first inclined discharging opening is provided with a second filter screen 67, the filtering branch pipe 64 is in communication with the first inclined discharging opening and the filtering tank 65 at two ends thereof, the backflow pipe 66 is in communication with the second inclined discharging opening and the filtering tank 65, and the filtering tank 65 is provided with a third filter screen 68 between the filtering branch pipe 64 and the backflow pipe 66.

[0034] The utility model discloses the beneficial effect has: one, through the design of electric control four -way ball valve 12 and multiple water inlet branch pipe 13, periodically switch the water inlet branch pipe 13 of input waste liquid, the water inlet branch pipe 13 of temporarily not input waste liquid, as shown in the specification, PLC controller signal linkage control idle water inlet branch pipe 13's first electric control butterfly valve 33, second electric control butterfly valve 34 opens, and the backflushing water pump 31 extracts backflushing water tank liquid and impacts the intercepting object on first filter screen 14 to the residue collection tank 32, and the cleaning work of first filter screen 14 is completed. Figure 4

[0035] Then the water inlet branch pipe 13 that cleaning is finished closes first, second electric control butterfly valve 34, and then controls electric control ball valve switching, and the waste water enters the water inlet branch pipe 13 that cleaning is finished, and such design can keep the waste water after filtration input sedimentation tank 21 while carrying out the cleaning work to filter screen in the state of not stopping, and does not rely on manual, greatly improves production efficiency, and improves waste water treatment capacity.

[0036] Four, through the structural design of dosing device, water wheel 41 extracts supernatant of sedimentation tank 21, because of the overflow port design of water bucket 43, the water amount that water bucket 43 extracts is fixed, can calculate the dosage according to the capacity, and has the accurate dosing of metering pump, avoids the fluctuation of total waste water amount caused by continuous water inlet, improves waste water treatment effect when waste water treatment effect is improved, and after coagulant is added to water bucket 43, the mixing effect of coagulant is also promoted in the process of pouring.

[0037] Five, the design of stirring shaft 61 of flocculation tank 22 further strengthens coagulant mixing effect, and the designed flocculation pipe 62 separates flocculation solid-liquid, and solid is intercepted in filter box 65 by second filter screen 67, third filter screen 68 and is centrally cleaned, and filter liquid is uniformly discharged through backflow pipe 66.

[0038] Up to now, the technical scheme of the application has been described in connection with the preferred embodiments shown in the drawings, and those skilled in the art should understand that the protection scope of the application is obviously not limited to these specific embodiments, and those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the application, and the technical scheme after these changes or replacements will fall within the protection scope of the application.​

Claims

1. A coagulation pretreatment equipment for the concentration liquid of a diafiltration membrane, comprising a water inlet main pipeline, a filtering device, a sedimentation tank, a dosing device and a flocculation tank, characterized in that: The device also comprises an electrically controlled four-way ball valve, several water inlet branches, one end of which is connected to the electrically controlled four-way ball valve, and the other end of which extends to the sedimentation tank, a first filter screen is arranged in the middle of the water inlet branch, a backwashing branch is arranged in communication with one side of the first filter screen towards the sedimentation tank, and a residue discharge branch is arranged in communication with one side of the first filter screen towards the electrically controlled four-way ball valve; The filtering device comprises a backwashing water pump, a backwashing water tank, a residue collecting tank, and first and second electrically controlled butterfly valves for opening and closing the backwashing branch and the residue discharge branch, the electrically controlled four-way ball valve is signal-linked with the first and second electrically controlled butterfly valves of each water inlet branch, waste water is periodically input into one of the water inlet branches, and the first and second electrically controlled butterfly valves of the remaining water inlet branches are controlled to be opened, the backwashing water pump draws liquid in the backwashing water tank to impact the intercepted objects on the first filter screen into the residue collecting tank.

2. The equipment for coagulation pretreatment of a concentrate of a diafiltration membrane according to claim 1, characterized in that: The dosing device comprises a water wheel, a driving motor, several water buckets, a storage tank, a metering pump, a dumping top rod, and a driving cylinder, a retaining wall is arranged between the sedimentation tank and the flocculation tank, a notch is arranged at the retaining wall and is adapted to the profile of the water wheel, the water wheel is arranged in the notch and is rotationally linked with the driving motor, the water wheel comprises a dumping station on one side of the flocculation tank, a water lifting station on one side of the sedimentation tank, and a dosing station away from the liquid surface of the sedimentation tank, the dosing station and the dumping station are each provided with a proximity switch, the several water buckets are equally hinged on the water wheel and pass through the lifting station and the dumping station, and the water buckets are provided with overflow holes on the side surfaces; The metering pump is in pipeline communication with the storage tank, is signal-connected with the proximity switch of the dosing station, and is arranged vertically above the dosing station, the metering pump releases a preset amount of coagulant into the water bucket passing through the dosing station according to the proximity switch signal of the same station; The dumping top rod is arranged at the dumping station and is linked with the driving cylinder, the driving cylinder drives the dumping top rod to overturn the water bucket passing through the dumping station according to the proximity switch signal of the dumping station, and drives the liquid in the water bucket to flow into the flocculation tank.

3. A coagulation pretreatment apparatus for a diafiltration membrane concentrate according to claim 2, characterized in that: The water bucket is provided with several overflow holes in the vertical direction, and the water bucket also comprises several plug members, and the water bucket selectively opens the overflow holes.

4. The equipment for coagulation pretreatment of a concentrate of a reverse osmosis membrane according to claim 3, characterized in that: The flocculation tank is provided with a stirring shaft, a stirring motor, a flocculation discharge pipeline, a third electrically controlled butterfly valve, a filtering branch, a filtering tank, and a backflow pipe, the flocculation discharge pipeline is provided with a first inclined discharge port and a second inclined discharge port, the first inclined discharge port is provided with a second filter screen, the filtering branch is in communication with the first inclined discharge port and the filtering tank at both ends, the backflow pipe is in communication with the second inclined discharge port and the filtering tank, and the filtering tank is provided with a third filter screen between the filtering branch and the backflow pipe.

Images