CN214360860U - Treatment device for landfill leachate membrane concentrated solution - Google Patents

Abstract

The utility model discloses a processing apparatus of landfill leachate membrane concentrate, include: the device comprises a collecting tank, an induced crystallization tank, a coagulating sedimentation tank, a catalytic oxidation tank, an active carbon filtering tank and the like; the device comprises a collecting tank, an induction crystallizing tank, a coagulating sedimentation tank, a catalytic oxidation tank and an active carbon filtering tank, wherein the collecting tank, the induction crystallizing tank, the coagulating sedimentation tank and the catalytic oxidation tank are sequentially connected through a conveying pipe; the utility model has the advantages that: ensuring that the effluent stably reaches the standard.

Description

Treatment device for landfill leachate membrane concentrated solution

Technical Field

The utility model relates to landfill leachate membrane concentrate field of handling specifically is a processing apparatus of landfill leachate membrane concentrate.

Background

The landfill leachate refers to high-concentration wastewater generated under the biochemical degradation action such as compaction and fermentation and the seepage action of precipitation and groundwater in the stacking and disposal processes of household garbage, the current mainstream treatment process is a biochemical and membrane combined process, the effluent is ensured to reach the standard, and meanwhile, a certain proportion of membrane concentrated solution is inevitably generated, the main component of the membrane concentrated solution is humic substances, the organic pollution concentration is high, most of the membrane concentrated solution is inorganic salts such as nondegradable and refractory organic substances and heavy metals, the B/C ratio is generally 0.01, basically no ammonia nitrogen exists, the treatment difficulty is high, and the current domestic and foreign main treatment method for the landfill leachate membrane concentrated solution comprises the following steps: the coagulating sedimentation method is easy to generate secondary pollution, has poor treatment effect and still has high indexes of various pollutants in the effluent; the evaporation drying method has high requirements on equipment, high running cost and complex operation management; the method is used for recharging the concentrated solution to a landfill, so that the pollution problem is difficult to solve fundamentally, and secondary pollution is easy to form; the Fenton reagent oxidation method has high requirements on reaction conditions, the optimal reaction pH value is about 4, and the medicament consumption is high; the adsorption burning method is applied more abroad, has better treatment effect, but has high requirement on an adsorbent, and generally adopts activated carbon, but the activated carbon has poor mechanical strength and difficult regeneration, so that the application of the adsorption burning method is limited; the problem cannot be thoroughly solved by a single method, so that the prior art needs a treatment device for the landfill leachate membrane concentrated solution, which combines a plurality of process methods to improve the treatment degree of the landfill leachate membrane concentrated solution and reduce the emission pollution.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a processing apparatus of rubbish leachate membrane concentrate to solve the problem mentioned in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a landfill leachate membrane concentrate treatment apparatus comprising: the device comprises a collecting tank, an induced crystallization tank, a coagulating sedimentation tank, a catalytic oxidation tank, an activated carbon filtering tank, a sludge sedimentation tank, a sludge dewatering tank, a first sewage discharge pipe, a second sewage discharge pipe, a third sewage discharge pipe, a clear liquid return pipe, a sludge discharge pipe and a conveying pipe; the collecting tank, the induced crystallization tank, the coagulating sedimentation tank, the catalytic oxidation tank, the activated carbon filtering tank, the sludge sedimentation tank and the sludge dewatering tank are all of water tank structures with the peripheries and the bottom surfaces closed, the collecting tank, the induced crystallization tank, the coagulating sedimentation tank, the catalytic oxidation tank and the activated carbon filtering tank are sequentially connected through conveying pipes, the bottom of the induced crystallization tank is connected with a first sewage discharge pipe, the other port of the first sewage discharge pipe is communicated with the sludge sedimentation tank, and the port of the first sewage discharge pipe is positioned at the upper opening of the sludge sedimentation tank; the bottom of the coagulating sedimentation tank is connected with a second sewage discharge pipe, the other port of the second sewage discharge pipe is communicated with the sludge sedimentation tank, and the port of the second sewage discharge pipe is positioned at the upper opening of the sludge sedimentation tank; the bottom of the pool of catalytic oxidation pond is connected with the third blow off pipe, and another port intercommunication sludge sedimentation pond of third blow off pipe, and this port of third blow off pipe is located sludge sedimentation pond's upper shed department, and the two-thirds high department of sludge sedimentation pond's lateral wall is equipped with the clear liquid back flow, and another port intercommunication collecting pit of clear liquid back flow, and this port of clear liquid back flow is located the upper shed department of collecting pit, induced crystallizer department is equipped with the crystallization agent holding vessel body, coagulating sedimentation pond department is equipped with the flocculating agent holding vessel body, it has active carbon to fill in the active carbon filtering ponds, sludge conduit and sludge dewatering pond are passed through to sludge sedimentation pond's bottom and are connected, the conveyer pipe is one-way conveyer pipe.

Preferably, the topography height of collecting pit, induced crystallization pond, coagulating sedimentation tank, catalytic oxidation pond, active carbon filtering ponds, sludge sedimentation tank reduces in proper order, perhaps is equipped with the dredge pump on the conveyer pipe between collecting pit, induced crystallization pond, coagulating sedimentation tank, catalytic oxidation pond, active carbon filtering ponds, the sludge sedimentation tank, and all dredge pump are to the syntropy, from last one-level to next one-level, and the collecting pit is as superior level, and the active carbon filtering ponds is as the subordinate level.

Preferably, the clear liquid return pipe is provided with an infusion pump, the infusion pump is a one-way pump, and the pump direction of the infusion pump is from the sludge settling tank to the collection tank.

Preferably, a crystallizing agent is stored in the crystallizing agent storage tank body, and the crystallizing agent is solid quicklime powder or liquid sodium carbonate solution.

Preferably, the flocculant storage tank body is used for storing a flocculant, and the flocculant is PAC (polyaluminium chloride) powder and PAM (polyacrylamide) powder or a mixture of PAC and PAM.

Preferably, a UV/Fenton catalytic oxidation system (photo-Fenton catalytic oxidation system) is arranged in the catalytic oxidation pond.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model adopts an integrated device, integrates and connects several processes in series, firstly, the Ca2+ and the Mg2+ in the concentrated solution are removed by the induced crystallization mode of the lime soda ash method, the hardness of the concentrated solution is reduced, and the salinity in the concentrated solution is removed; adopting a coagulating sedimentation method, and enabling colloid in the concentrated solution to be unstable through the effects of a double electric layer compression, electric neutralization adsorption and bridging adsorption of inorganic polymer and organic polymer flocculating agents to form floc, and further separating the floc from water; the working section can remove 60 to 80 percent of pollutants such as COD and the like in the concentrated solution; by adopting a UV/Fenton catalytic oxidation system, the effect of the Fenton catalytic oxidation of organic matters in the concentrated solution is enhanced through the synergistic effect of ultraviolet light, and macromolecular organic matters are finally oxidized and decomposed into inorganic matters such as CO2 and H2O, so that pollutants are completely removed; biological activated carbon filter equipment is as the stable guarantee up to standard of play water, adsorbs the organic matter and decomposes through the adsorption of active carbon and the synergistic action of the organic decomposition of the interior microorganism of active carbon layer, ensures that the stable assurance up to standard of play water.

Drawings

Fig. 1 is a schematic structural diagram of a landfill leachate membrane concentrate treatment apparatus.

Fig. 2 is a schematic flow diagram of a landfill leachate membrane concentrate treatment plant.

In the figure: 1. a collection tank; 2. an induction crystallization tank; 3. a coagulating sedimentation tank; 4. a catalytic oxidation tank; 5. an active carbon filter tank; 6. a sludge sedimentation tank; 7. a sludge dewatering tank; 8. a first drain pipe; 9. a second sewage draining pipe; 10. a third blow-off pipe; 11. a clear liquid return pipe; 12. a sludge discharge pipe; 13. a delivery pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, in an embodiment of the present invention, an apparatus for treating a landfill leachate membrane concentrate includes: the system comprises a collecting tank 1, an induced crystallization tank 2, a coagulating sedimentation tank 3, a catalytic oxidation tank 4, an activated carbon filtering tank 5, a sludge sedimentation tank 6, a sludge dewatering tank 7, a first sewage discharge pipe 8, a second sewage discharge pipe 9, a third sewage discharge pipe 10, a clear liquid return pipe 11, a sludge discharge pipe 12 and a conveying pipe 13; the collecting tank 1, the induced crystallization tank 2, the coagulating sedimentation tank 3, the catalytic oxidation tank 4, the activated carbon filtering tank 5, the sludge sedimentation tank 6 and the sludge dewatering tank 7 are all of a water tank structure with the periphery and the bottom surface closed, the collecting tank 1, the induced crystallization tank 2, the coagulating sedimentation tank 3, the catalytic oxidation tank 4 and the activated carbon filtering tank 5 are sequentially connected through a conveying pipe 13, the bottom of the induced crystallization tank 2 is connected with a first sewage discharge pipe 8, the other port of the first sewage discharge pipe 8 is communicated with the sludge sedimentation tank 6, and the port of the first sewage discharge pipe 8 is located at the upper opening of the sludge sedimentation tank 6; the bottom of the coagulating sedimentation tank 3 is connected with a second sewage discharge pipe 9, the other port of the second sewage discharge pipe 9 is communicated with the sludge sedimentation tank 6, and the port of the second sewage discharge pipe 9 is positioned at the upper opening of the sludge sedimentation tank 6; the bottom of the pool of catalytic oxidation pond 4 is connected with third blow off pipe 10, another port intercommunication sludge sedimentation pond 6 of third blow off pipe 10, and this port of third blow off pipe 10 is located the upper shed department of sludge sedimentation pond 6, and the two-thirds high department of the lateral wall of sludge sedimentation pond 6 is equipped with clear liquid back flow 11, and another port intercommunication collecting pit 1 of clear liquid back flow 11, and this port of clear liquid back flow 11 is located the upper shed department of collecting pit 1, 2 departments of induced crystallization pond are equipped with the crystallization agent holding vessel body, 3 departments of coagulating sedimentation pond are equipped with the flocculating agent holding vessel body, it has the active carbon to fill in the active carbon filtering ponds 5, sludge duct and sludge dewatering pond 7 are passed through to the bottom of sludge sedimentation pond 6 and are connected, conveyer pipe 13 is one-way conveyer pipe.

Collecting pit 1, induction crystallizer 2, coagulating sedimentation tank 3, catalytic oxidation pond 4, active carbon filtering ponds 5, the topography height of sludge sedimentation tank 6 reduces in proper order, perhaps collecting pit 1, induction crystallizer 2, coagulating sedimentation tank 3, catalytic oxidation pond 4, active carbon filtering ponds 5, be equipped with the dredge pump on the conveyer pipe 13 between the sludge sedimentation tank 6, all dredge pump pumps are to the syntropy, from last one-level to next one-level, collecting pit 1 is the superior level, active carbon filtering ponds 5 are as the subordinate level.

The clear liquid return pipe 11 is provided with a liquid delivery pump which is a one-way pump, and the pump direction of the liquid delivery pump is from the sludge settling tank 6 to the collecting tank 1.

And a crystallizing agent is stored in the crystallizing agent storage tank body, and the crystallizing agent is solid quicklime powder or liquid sodium carbonate solution.

The flocculant storage tank body is internally stored with a flocculant which is PAC (polyaluminium chloride) powder and PAM (polyacrylamide) powder or a mixture of PAC and PAM.

And a UV/Fenton catalytic oxidation system (photo-Fenton catalytic oxidation system) is arranged in the catalytic oxidation tank 4.

The utility model discloses a theory of operation is: when in use, firstly, conveying the garbage leachate membrane concentrated solution into a collecting tank 1 by using a conveying pump, and collecting the membrane concentrated solution by using the collecting tank 1 for subsequent treatment; conveying the percolate membrane concentrated solution to an induced crystallization tank 2 through a conveying pipe 13, adding a crystallizing agent for induced crystallization, and generating CaCO3 and Mg (OH)2 precipitates through reaction; precipitating Ca2+ and Mg2+ plasma in the concentrated solution in water, reducing the hardness of the membrane concentrated solution, and removing salt in the concentrated solution; thirdly, the softened percolate membrane concentrated solution enters a coagulating sedimentation tank 3, a certain amount of flocculating agent is added for coagulating sedimentation, and colloid in the concentrated solution is destabilized to form flocs through the compression double electric layers, the adsorption charge neutralization and the adsorption bridging action of inorganic polymer and organic polymer flocculating agents, so that the flocs are separated from water and precipitated; the step can remove 60 to 80 percent of pollutants such as COD and the like in the concentrated solution; fourthly, the effluent after coagulating sedimentation is catalyzed and oxidized by a photo-Fenton method by utilizing a UV/Fenton catalytic oxidation system in the catalytic oxidation tank 4, macromolecular organic matters are finally oxidized and decomposed into inorganic matters such as CO2 and H2O, pollutants are thoroughly removed, and inorganic non-decomposable substances are precipitated at the bottom of the tank; the upper layer liquid after the procedure IV is conveyed to an activated carbon filter tank 5 through a conveying pipe 13, and the activated carbon in the activated carbon filter tank 5 is used for discharging the water liquid after adsorbing part of impurities in the water liquid; further, bottom sediment that induced crystallization pond 2, coagulating sedimentation tank 3, catalytic oxidation pond 4 produced in the- (r) process is carried to sludge sedimentation tank 6 through first blow off pipe 8, second blow off pipe 9, third blow off pipe 10 respectively with the dredge pump on it, the middle and upper clear liquid after 6 precipitations of sludge sedimentation tank carries backward flow to collecting pit 1 through clear liquid back flow pipe 11, carries out the back flush to collecting pit 1, lower floor's mud is collected to sludge dewatering pond 7 in the sludge sedimentation tank 6, and the mud in the sludge dewatering pond 7 is carried out the landfill or is used as fertilizer after air-drying or dripdrying (UV/Fenton catalytic oxidation system in the catalytic oxidation pond 4 directly uses non-this application's protective range and omits its concrete structure and principle for this application admittedly).

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention; furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated; thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.

In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein; any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. A landfill leachate membrane concentrate treatment apparatus comprising: the device comprises a collecting tank (1), an induced crystallization tank (2), a coagulating sedimentation tank (3), a catalytic oxidation tank (4), an activated carbon filtering tank (5), a sludge sedimentation tank (6), a sludge dewatering tank (7), a first sewage discharge pipe (8), a second sewage discharge pipe (9), a third sewage discharge pipe (10), a clear liquid return pipe (11), a sludge discharge pipe (12) and a conveying pipe (13); the method is characterized in that: the collecting tank (1), the induction crystallizing tank (2), the coagulating sedimentation tank (3), the catalytic oxidation tank (4), the activated carbon filtering tank (5), the sludge sedimentation tank (6) and the sludge dewatering tank (7) are all of water tank structures with the peripheries and the bottom surfaces closed, the collecting tank (1), the induction crystallizing tank (2), the coagulating sedimentation tank (3), the catalytic oxidation tank (4) and the activated carbon filtering tank (5) are sequentially connected through a conveying pipe (13), a first sewage discharge pipe (8) is connected to the bottom of the induction crystallizing tank (2), the other port of the first sewage discharge pipe (8) is communicated with the sludge sedimentation tank (6), and the port of the first sewage discharge pipe (8) is located at the upper opening of the sludge sedimentation tank (6); the bottom of the coagulating sedimentation tank (3) is connected with a second blow-off pipe (9), the other port of the second blow-off pipe (9) is communicated with the sludge sedimentation tank (6), and the port of the second blow-off pipe (9) is positioned at the upper opening of the sludge sedimentation tank (6); the bottom of the catalytic oxidation tank (4) is connected with a third blow-off pipe (10), the other port of the third blow-off pipe (10) is communicated with a sludge sedimentation tank (6), the port of the third blow-off pipe (10) is positioned at the upper opening of the sludge sedimentation tank (6), a clear liquid return pipe (11) is arranged at the two thirds height of the side wall of the sludge sedimentation tank (6), the other port of the clear liquid return pipe (11) is communicated with the collection tank (1), and the port of the clear liquid return pipe (11) is positioned at the upper opening of the collecting tank (1), a crystallizing agent storage tank body is arranged at the position of the induced crystallization tank (2), a flocculating agent storage tank body is arranged at the position of the coagulating sedimentation tank (3), activated carbon is filled in the activated carbon filtering tank (5), the bottom of the sludge settling tank (6) is connected with the sludge dewatering tank (7) through a sludge pipeline, and the conveying pipe (13) is a one-way conveying pipe.

2. The apparatus for treatment of landfill leachate membrane concentrate of claim 1, wherein: the novel sewage treatment device is characterized in that the collecting tank (1), the induction crystallizing tank (2), the coagulating sedimentation tank (3), the catalytic oxidation tank (4), the activated carbon filtering tank (5) and the terrain height of the sludge sedimentation tank (6) are reduced in sequence, or the collecting tank (1), the induction crystallizing tank (2), the coagulating sedimentation tank (3), the catalytic oxidation tank (4), the activated carbon filtering tank (5) and a sewage pump are arranged on a conveying pipe (13) between the sludge sedimentation tanks (6), all the sewage pumps are in the same direction, from the upper stage to the lower stage, the collecting tank (1) serves as the most superior stage, and the activated carbon filtering tank (5) serves as the most inferior stage.

3. The apparatus for treatment of landfill leachate membrane concentrate of claim 1, wherein: the clear liquid return pipe (11) is provided with an infusion pump which is a one-way pump, and the pump direction of the infusion pump is from the sludge settling tank (6) to the collection tank (1).

4. The apparatus for treatment of landfill leachate membrane concentrate of claim 1, wherein: and a crystallizing agent is stored in the crystallizing agent storage tank body, and the crystallizing agent is solid quicklime powder or liquid sodium carbonate solution.

5. The apparatus for treatment of landfill leachate membrane concentrate of claim 1, wherein: and a flocculating agent is stored in the flocculating agent storage tank body.

6. The apparatus for treatment of landfill leachate membrane concentrate of claim 1, wherein: and a UV/Fenton catalytic oxidation system is arranged in the catalytic oxidation tank (4).

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