CN214218447U - Sewage treatment device for farm - Google Patents

Abstract

The utility model relates to a plant sewage treatment plant imports from the raw water and is that the filth storage tank imports to the clear water export and is the export of quartz sand filter equipment, includes filth storage tank, one-level solid-liquid separation equipment, second grade solid-liquid separation equipment, osmotic membrane filter equipment, ultrasonic treatment device, active carbon adsorption device, tertiary solid-liquid separation equipment and quartz sand filter equipment that the series connection set up in proper order. The utility model discloses a to plant's filth continuous processing, the handling capacity is big, and device area is little, carries out continuous processing, abundant separation to the filth, reduces COD content by a wide margin, effectively kills bacterium such as escherichia coli in the waste water, fungus, subtracts quantization collection, innocent treatment and utilization to waste water.

Description

Sewage treatment device for farm

Technical Field

The utility model belongs to the technical field of waste water treatment, a plant waste water integrated processing system is related to, a plant filth processing apparatus that poultry such as concretely relates to milk cow, pig were used.

Background

In recent years, the intensive, specialized and large-scale livestock breeding degree is continuously improved, but livestock is vigorous in metabolism and large in feed intake, so that a large amount of breeding pollutants are generated while the livestock industry is rapidly developed, the sewage mainly contains odorous substances such as livestock manure, urine, flushing sewage of a shed and the like, the sewage contains a large amount of organic matters, nitrogen, phosphorus, suspended matters, heavy metal elements, residual veterinary drugs, proteins, fat and the like, pathogenic bacteria (especially escherichia coli) microorganisms and pathogenic parasite eggs and the like from animal intestinal tracts, the types and the amount of the pathogenic bacteria in the environment are greatly increased, the pathogenic bacteria and parasites are promoted to be greatly propagated, especially the escherichia coli is an easily-propagated and bred bacterium, and the pathogenic bacteria usually exist in the sewage and the excrement of the livestock farm and are extremely harmful to human bodies.

At present, livestock farms at home and abroad generally carry out comprehensive utilization and treatment on cultivation wastes, and the comprehensive treatment method generally combines a plurality of fecal treatment technologies, wherein the biological treatment technology is the main technology. The treatment system comprises a UASB pool, a sedimentation pool, a biological oxidation pond, an anoxic anaerobic aerobic pool, a disinfection pool and other units, occupies a large amount of cultivated land, has complex treatment process, long treatment time, can not be continuously treated, and can not deal with the treatment of the farm wastewater which is continuously and massively discharged for a long time; the solid-liquid separation is carried out on the wastewater of the dairy farm by using the separator, and because the separation of the separator is insufficient, the solid content in the liquid and the liquid content in the solid are both too high, which is not beneficial to preparing the organic fertilizer from solid dirt; when the ultraviolet disinfection is adopted, turbidity and suspended matters in water have great influence on ultraviolet sterilization, the ultraviolet disinfection device needs to be regularly cleaned and surface cooling measures are adopted to prevent scaling in the device, the disinfection effect is not ideal, and the use is inconvenient.

In the prior art, sewage in a farm can be effectively treated by biotechnology and the like, but the method has large floor area and long treatment time and cannot deal with the treatment of the farm wastewater which is continuously and massively discharged for a long time; for the solid-liquid separation of dirt in a farm, an extrusion type solid-liquid separator is generally adopted, and the problems that the extrusion type solid-liquid separator is insufficient in separation, and a large amount of solid small particles exist in the separated wastewater, so that the subsequent sterilization treatment is hindered are solved; in the prior art, the membrane technology and the ultrasonic technology can effectively intercept or sterilize micro pollutants, bacteria and the like in liquid, but impurities in the liquid to be treated influence the treatment effect and cannot be directly applied to treatment of waste water of a farm.

Chinese patent application document CN110342772A discloses a sewage treatment device for a dairy farm and a treatment method thereof, comprising a solid-liquid separation device, an osmotic membrane filtration device, an ultrasonic sterilization device and a sewage storage tank, wherein the sewage in the sewage storage tank is conveyed to the solid-liquid separation device for solid-liquid separation, and a sewage mixture obtained by solid-liquid separation is conveyed to the osmotic membrane filtration device for filtration; or the clear liquid from the osmotic membrane filter device can be conveyed to an ultrasonic sterilization device for sterilization. This patent document a milk cow plant filth processing apparatus, when treating that the filth volume is very big, the COD content in the discharged clear solution is too high, still remains the pathogen fungus that the small part is not killed.

Therefore, the waste water of the livestock farm contains a large amount of solid impurities such as organic matters and the like and components such as pathogenic bacteria (particularly escherichia coli) and the like, and serious environmental pollution is caused by direct irrigation, while the treatment difficulty of the waste water is very high, which is a big problem in the industry and restricts the development of the livestock breeding industry.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: for overcoming prior art's defect, provide a device that carries out continuous processing to a large amount of filths of scale poultry plant, abundant solid-liquid separation reduces COD content by a wide margin, effectively kills bacterium, fungi such as escherichia coli in the waste water, carries out "minimizing collection, innocent treatment and resource utilization" to the waste water.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a plant sewage treatment plant, is imported from the raw water import promptly filth storage tank to the clear water export promptly quartz sand filter equipment export, includes filth storage tank, one-level solid-liquid separation equipment, second grade solid-liquid separation equipment, osmotic membrane filter equipment, ultrasonic treatment device, active carbon adsorption equipment, tertiary solid-liquid separation equipment and quartz sand filter equipment that the series connection set up in proper order.

Further, the sewage storage tank is provided with a sewage storage tank inlet and a sewage storage tank outlet; the sewage storage tank is connected with an inlet of the first-stage solid-liquid separation device through a first conveying pipeline and a first feeding pump arranged in the first conveying pipeline.

The primary solid-liquid separation device is provided with a primary solid-liquid separation device inlet, a primary solid-liquid separation device first outlet and a primary solid-liquid separation device second outlet; and a second outlet of the first-stage solid-liquid separation device is connected with an inlet of the second-stage solid-liquid separation device through a second conveying pipeline and a second feeding pump arranged in the second conveying pipeline.

The second-stage solid-liquid separation device is provided with a second-stage solid-liquid separation device inlet, a second-stage solid-liquid separation device first outlet and a second-stage solid-liquid separation device second outlet; and a second outlet of the secondary solid-liquid separation device is connected with an inlet of the permeable membrane filtering device through a third conveying pipeline and a third feeding pump arranged in the third conveying pipeline.

The permeable membrane filtering device is provided with a permeable membrane filtering device inlet, a concentrated solution outlet and a clear solution filtrate outlet; and the clear liquid outlet is connected with the inlet of the ultrasonic treatment device through a conveying pipeline IV and a feeding pump IV arranged in the conveying pipeline IV.

The ultrasonic treatment device is provided with an ultrasonic treatment device inlet and an ultrasonic treatment device outlet, and the ultrasonic treatment device outlet is connected with the activated carbon adsorption device inlet through a conveying pipeline five and a feeding pump five arranged in the conveying pipeline five.

The active carbon adsorption device is provided with an active carbon adsorption device inlet and an active carbon adsorption device outlet, and the active carbon adsorption device outlet is connected with the inlet of the three-stage solid-liquid separation device through a conveying pipeline six and a feeding pump six arranged in the conveying pipeline six.

The three-stage solid-liquid separation device is provided with an inlet of the three-stage solid-liquid separation device, a first outlet of the three-stage solid-liquid separation device and a second outlet of the three-stage solid-liquid separation device; and a second outlet of the third-stage solid-liquid separation device is connected with an inlet of the quartz sand filtering device through a conveying pipeline seven and a feeding pump seven arranged in the conveying pipeline seven.

The quartz sand filtering device is provided with a quartz sand filtering device inlet and a quartz sand filtering device outlet.

Furthermore, the inlet of the permeable membrane filtering device is provided with a first ultrasonic transducer action cavity, the inlet of the permeable membrane filtering device and the first ultrasonic transducer are respectively arranged and installed on the first ultrasonic transducer action cavity, and the first ultrasonic transducer is controlled by an ultrasonic driving power supply electrically connected with the first ultrasonic transducer.

Furthermore, the inlet of the active carbon adsorption device is a Venturi three-way pipe, and the Venturi three-way pipe comprises a Venturi three-way pipe inlet, a Venturi three-way pipe outlet and a Venturi three-way pipe side inlet; the inlet of the Venturi three-way pipe is communicated with the fifth conveying pipeline, the outlet of the Venturi three-way pipe is communicated with the active carbon adsorption device, and the inlet at the side of the Venturi three-way pipe is connected with the active carbon storage tank through the active carbon conveying pipe.

The inlet of the Venturi three-way pipe and the outlet of the Venturi three-way pipe are provided with a common central line I, and a central line II of the side inlet of the Venturi three-way pipe is vertically intersected with the central line I; the inlet of the Venturi three-way pipe is a conical hole which is gradually reduced from top to bottom; the outlet of the Venturi three-way pipe is a conical hole which is gradually reduced from bottom to top; the diameter d1 of the small end of the conical hole of the inlet of the Venturi three-way pipe is consistent with the diameter d2 of the small end of the conical hole of the outlet of the Venturi three-way pipe, and the small end of the conical hole of the inlet of the Venturi three-way pipe is communicated with the small end of the conical hole of the outlet of the Venturi three-way pipe through a straight hole; the inlet at the side of the Venturi three-way pipe is a cylindrical hole and is communicated with the straight hole.

Further, a dosing device is further arranged between the first-stage solid-liquid separation device and the second-stage solid-liquid separation device, and the dosing device comprises a coagulant aid adding device and a flocculating agent adding device.

The coagulant aid adding device consists of a coagulant aid mixing box, a first dosing pipeline and a first dosing pump, wherein the first dosing pipeline is used for communicating the coagulant aid mixing box with the second conveying pipeline, and the first dosing pump is arranged in the first dosing pipeline and communicated with the second conveying pipeline at a coagulant aid access point.

The flocculant adding device consists of a flocculant mixing box, a dosing pipeline II for communicating the flocculant mixing box with the conveying pipeline II and a dosing pump II in the dosing pipeline II, wherein the dosing pipeline II is communicated with the conveying pipeline II at a flocculant access point.

In the second conveying pipeline, the coagulant aid access point is positioned at one side close to the first-stage solid-liquid separation device; the flocculant access point is positioned at one side close to the secondary solid-liquid separation device; a static mixer I is also connected between the coagulant aid access point and the flocculant access point in the conveying pipeline II; and a second static mixer is connected between the flocculant access point in the second conveying pipeline and the second-stage solid-liquid separation device.

Further, a plant sewage treatment device still includes the washing pipeline, and quartz sand filter equipment export is through washing pipeline and setting up the washing water pump that is close to quartz sand filter equipment one side in the washing pipeline, and respectively with quartz sand filter equipment import, tertiary solid-liquid separation device import, active carbon adsorption device import, ultrasonic treatment device import, osmotic membrane filter equipment import, second grade solid-liquid separation device import, one-level solid-liquid separation device import and filth storage tank washing mouth switch on mutually.

The utility model has the advantages that:

1. the first-stage solid-liquid separation device and the second-stage solid-liquid separation device are connected in series in a sewage treatment device of a farm for use, the first-stage solid-liquid separation device and the second-stage solid-liquid separation device use a horizontal spiral sedimentation centrifuge for high-speed separation, the feed with the material concentration as low as 0.5%, the minimum particle diameter of suspended matters as low as 5 mu m and the minimum specific gravity difference of not less than 1:1.15 can be treated, the solid water content after treatment is about 70%, the solid water content is not higher than 0.1%, and the solid waste can be used for preparing organic fertilizer; the solid-liquid separation device and the permeable membrane filtering device are combined and used in series, so that the possibility is provided for the use of the permeable membrane filtering device, and the purpose of primary purification is achieved; the device realizes sufficient solid-liquid separation, greatly reduces the COD content, effectively kills bacteria and fungi such as escherichia coli in the wastewater, and performs 'reduction collection, harmless treatment and resource utilization' on the wastewater.

2. The technical scheme is that the sewage in the farm is continuously treated, the treatment capacity is large, and the treatment capacity of one set of device is 5 tons of sewage in the farm per hour; the device occupies a small area, and the area occupied by the device is less than 100 square meters.

3. The inlet of the active carbon adsorption device is designed into a Venturi three-way pipe, so that the active carbon can be sucked into the active carbon adsorption device through the Venturi effect and is mixed with the solution to generate adsorption.

4. A dosing device is arranged between the first-stage solid-liquid separation device and the second-stage solid-liquid separation device, so that a coagulant aid and a flocculating agent are added into the oil-water mixture, small-particle solid waste and floating matters are separated in the second-stage solid-liquid separation device, and the liquid content in the solid and the solid content in the liquid are effectively reduced.

Drawings

Fig. 1 is a schematic view of embodiment 1 of the present invention;

FIG. 2 is a schematic view of a part of the structure of the osmotic membrane filtration device according to example 2 of the present invention;

fig. 3 is a schematic structural view of embodiment 3 of the present invention;

FIG. 4 is a schematic view showing the structure of a Venturi tee used in example 3;

wherein, 1 is a dirt storage tank, 11 is a dirt storage tank inlet, 12 is a dirt storage tank outlet, 13 is a conveying pipeline I, 14 is a feeding pump I, 2 is a primary solid-liquid separation device, 21 is a primary solid-liquid separation device inlet, 22 is a primary solid-liquid separation device first outlet, 23 is a primary solid-liquid separation device second outlet, 24 is a conveying pipeline II, 25 is a feeding pump II, 3 is a secondary solid-liquid separation device, 31 is a secondary solid-liquid separation device inlet, 32 is a secondary solid-liquid separation device first outlet, 33 is a secondary solid-liquid separation device second outlet, 34 is a conveying pipeline III, 35 is a feeding pump III, 4 is a permeable membrane filtering device, 41 is a permeable membrane filtering device inlet, 42 is a concentrated liquid outlet, 43 is a clear liquid outlet, 44 is a conveying pipeline IV, 45 is a feeding pump IV, 46 is an ultrasonic transducer action cavity I, 47 is an ultrasonic transducer I, and 5 is an ultrasonic treatment device, 51 is an inlet of an ultrasonic treatment device, 52 is an outlet of the ultrasonic treatment device, 53 is a fifth conveying pipeline, 54 is a fifth feeding pump, 6 is an activated carbon adsorption device, 61 is an inlet of the activated carbon adsorption device, 611 is a venturi tee, 6111 is an inlet of the venturi tee, 6112 is an outlet of the venturi tee, 6113 is an inlet on the side of the venturi tee, 6114 is a first central line, 6115 is a second central line, 6116 is a straight hole, 62 is an outlet of the activated carbon adsorption device, 63 is a sixth conveying pipeline, 64 is a sixth feeding pump, 65 is an activated carbon conveying pipe, 66 is an activated carbon storage tank, 7 is a three-stage solid-liquid separation device, 71 is an inlet of the three-stage solid-liquid separation device, 72 is a first outlet of the three-stage solid-liquid separation device, 73 is a second outlet of the three-stage solid-liquid separation device, 74 is a seventh conveying pipeline, 75 is a seventh feeding pump, 8 is a quartz sand filtering device, 81 is an inlet of the quartz sand filtering device, 82 is an outlet of the quartz sand filtering device, 83 is a cleaning pipeline, 84 is a cleaning water pump, 9 is a dosing device, 91 is a coagulant aid adding device, 911 is a coagulant aid mixing tank, 912 is a dosing pump I, 913 is a dosing pipeline I, 914 is a coagulant aid access point, 915 is a static mixer I, 92 is a flocculant adding device, 921 is a flocculant mixing tank, 922 is a dosing pump II, 923 is a dosing pipeline II, 924 is a flocculant access point, and 925 is a static mixer II;

d1 is the diameter of the small end of the conical hole at the inlet of the venturi tee, and d2 is the diameter of the small end of the conical hole at the outlet of the venturi tee.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1:

referring to fig. 1, the device for treating the sewage in the farm sequentially comprises a sewage storage tank 1, a first-stage solid-liquid separation device 2, a second-stage solid-liquid separation device 3, a permeable membrane filtration device 4, an ultrasonic treatment device 5, an activated carbon adsorption device 6, a third-stage solid-liquid separation device 7 and a quartz sand filtration device 8 which are connected end to end and arranged in series from a raw water inlet, namely a sewage storage tank inlet 11, to a clear water outlet, namely a quartz sand filtration device outlet 82.

Specifically, the dirt storage tank 1 is provided with a dirt storage tank inlet 11 and a dirt storage tank outlet 12; the sewage storage tank 1 is connected with an inlet 21 of the primary solid-liquid separation device through a first conveying pipeline 13 and a first feeding pump 14 arranged in the first conveying pipeline 13;

the primary solid-liquid separation device 2 is provided with a primary solid-liquid separation device inlet 21, a primary solid-liquid separation device first outlet 22 and a primary solid-liquid separation device second outlet 23; a second outlet 23 of the primary solid-liquid separation device is connected with an inlet 31 of the secondary solid-liquid separation device through a second conveying pipeline 24 and a second feeding pump 25 arranged in the second conveying pipeline 24;

the second-stage solid-liquid separation device 3 is provided with a second-stage solid-liquid separation device inlet 31, a second-stage solid-liquid separation device first outlet 32 and a second-stage solid-liquid separation device second outlet 33; the second outlet 33 of the secondary solid-liquid separation device is connected with the inlet 41 of the permeable membrane filtration device through a third conveying pipeline 34 and a third feeding pump 35 arranged in the third conveying pipeline 34;

the permeable membrane filtering device 4 is provided with a permeable membrane filtering device inlet 41, a concentrated solution outlet 42 and a clear solution, namely a filtrate outlet 43; the clear liquid outlet 43 is connected with the ultrasonic treatment device inlet 51 of the ultrasonic treatment device 5 through a conveying pipeline IV 44 and a feeding pump IV 45 arranged in the conveying pipeline IV 44;

the ultrasonic treatment device 5 is provided with an ultrasonic treatment device inlet 51 and an ultrasonic treatment device outlet 52, and the ultrasonic treatment device outlet 52 is connected with an activated carbon adsorption device inlet 61 through a conveying pipeline five 53 and a feeding pump five 54 arranged in the conveying pipeline five 53;

the activated carbon adsorption device 6 is provided with an activated carbon adsorption device inlet 61 and an activated carbon adsorption device outlet 62, and the activated carbon adsorption device outlet 62 is connected with a three-stage solid-liquid separation device inlet 71 through a conveying pipeline six 63 and a feeding pump six 64 arranged in the conveying pipeline six 63;

the three-stage solid-liquid separation device 7 is provided with a three-stage solid-liquid separation device inlet 71, a three-stage solid-liquid separation device first outlet 72 and a three-stage solid-liquid separation device second outlet 73; the second outlet 73 of the three-stage solid-liquid separation device is connected with the inlet 81 of the quartz sand filtering device through a conveying pipeline seven 74 and a feeding pump seven 75 arranged in the conveying pipeline seven 74;

the quartz sand filtering device 8 is provided with a quartz sand filtering device inlet 81 and a quartz sand filtering device outlet 82.

Example 2:

referring to fig. 2, a farm waste disposal apparatus is substantially the same as that of embodiment 1 except that: the inlet of the permeable membrane filtering device 4 is provided with a first ultrasonic transducer acting cavity 46, the inlet 41 of the permeable membrane filtering device and the first ultrasonic transducer 47 are respectively arranged on the first ultrasonic transducer acting cavity 46, and the first ultrasonic transducer 47 is controlled by an ultrasonic driving power supply electrically connected with the first ultrasonic transducer.

Example 3:

referring to fig. 1, 3 and 4, a farm waste disposal apparatus is substantially the same as that of embodiment 1 except that: the inlet 61 of the active carbon adsorption device is a Venturi tee pipe 611, and the Venturi tee pipe 611 comprises a Venturi tee pipe inlet 6111, a Venturi tee pipe outlet 6112 and a Venturi tee pipe side inlet 6113; the inlet 6111 of the Venturi tee is communicated with the fifth 53 of the conveying pipeline, the outlet 6112 of the Venturi tee is communicated with the active carbon adsorption device 6, and the inlet 6113 at the side of the Venturi tee is connected with the active carbon storage tank 66 through the active carbon conveying pipe 65;

the inlet 6111 of the Venturi three-way pipe and the outlet 6112 of the Venturi three-way pipe have a common central line I6114, and a central line II 6115 of the inlet 6113 at the side of the Venturi three-way pipe is vertically intersected with the central line I6114; the inlet 6111 of the Venturi three-way pipe is a conical hole which is gradually reduced from top to bottom; the outlet 6112 of the Venturi three-way pipe is a conical hole which is gradually reduced from bottom to top; the diameter d1 of the small end of the conical hole of the inlet 6111 of the Venturi tee is consistent with the diameter d2 of the small end of the conical hole of the outlet 6111 of the Venturi tee, and the small end of the conical hole of the inlet 6111 of the Venturi tee is communicated with the small end of the conical hole of the outlet 6111 of the Venturi tee through a straight hole 6116; the inlet 6113 at the side of the Venturi tee is a cylindrical hole and is communicated with the straight hole 6116.

Referring to fig. 3, in this embodiment, a chemical adding device 9 is further included between the first-stage solid-liquid separation device 2 and the second-stage solid-liquid separation device 3, and the chemical adding device 9 includes a coagulant aid adding device 91 and a flocculant adding device 92;

the coagulant aid adding device 91 consists of a coagulant aid mixing tank 911, a first dosing pipeline 913 for communicating the coagulant aid mixing tank 911 with a second conveying pipeline 24 and a first dosing pump 912 in the first dosing pipeline 913, wherein the first dosing pipeline 913 is communicated with the second conveying pipeline 24 at a coagulant aid access point 914;

the flocculant adding device 92 consists of a flocculant mixing box 921, a dosing pipeline II 923 for communicating the flocculant mixing box 921 with a conveying pipeline II 24 and a dosing pump II 922 in the dosing pipeline II 923, wherein the dosing pipeline II 923 is communicated with the conveying pipeline II 24 at a flocculant access point 924;

in the second conveying pipeline 24, the coagulant aid access point 914 is positioned at one side close to the first-stage solid-liquid separation device 2; a flocculant access point 924 is positioned at one side close to the secondary solid-liquid separation device 3; a first static mixer 915 is connected between the coagulant aid access point 914 and the flocculant access point 924 in the second conveying pipeline 24; and a second static mixer 925 is connected between the flocculant access point 924 in the second conveying pipeline 24 and the second-stage solid-liquid separation device 3.

The coagulant aid in the dosing device 9 is ferric chloride, and the flocculating agent is polyacrylamide.

Referring to fig. 3, the sewage treatment device for the farm further comprises a cleaning pipeline 83, and the outlet 82 of the quartz sand filtering device is communicated with the inlet 81 of the quartz sand filtering device, the inlet 71 of the third-stage solid-liquid separation device, the inlet 61 of the activated carbon adsorption device, the inlet 51 of the ultrasonic treatment device, the inlet 41 of the permeable membrane filtering device, the inlet 31 of the second-stage solid-liquid separation device, the inlet 21 of the first-stage solid-liquid separation device and the cleaning opening 15 of the sewage storage tank respectively through the cleaning pipeline 83 and a cleaning water pump 84 arranged at one side of the cleaning pipeline 83, which is close to the quartz sand filtering device.

In the above embodiments, the primary solid-liquid separation device 2 and the secondary solid-liquid separation device 3 are horizontal spiral sedimentation centrifuges, wherein the secondary solid-liquid separation device 3 may also be a plate-and-frame filter press or a plate centrifuge; the three-stage solid-liquid separation device 7 is a flat plate centrifuge or a plate-and-frame filter press.

Each unit in each embodiment comprises a dirt storage tank 1, a primary solid-liquid separation device 2, a secondary solid-liquid separation device 3, a permeable membrane filtering device 4, an ultrasonic treatment device 5, an activated carbon adsorption device 6, a tertiary solid-liquid separation device 7 and a quartz sand filtering device 8, wherein all electric devices are electrically connected through an electric control system.

Application example 1:

the method for treating the farm waste treatment device described in embodiment 1 or embodiment 2 or embodiment 3 comprises the following steps:

step a, stirring and mixing: the filth storage of plant is in filth storage tank 1, and the stirring misce bene.

Step b, primary solid-liquid separation: the farm sewage stirred and mixed uniformly in the sewage storage tank 1 is conveyed to the primary solid-liquid separation device 2 through the conveying pipeline I13 and the feeding pump I14 for primary solid-liquid separation, large-particle solid waste is discharged through the first outlet 22 of the primary solid-liquid separation device, and a sewage mixture is discharged from the second outlet 23 of the primary solid-liquid separation device.

Step c, solid-liquid re-separation: and conveying the sewage mixture discharged from the primary solid-liquid separation device 2 to the secondary solid-liquid separation device 3 through a second conveying pipeline 24 and a second feeding pump 25 for solid-liquid re-separation, discharging the small-particle solid waste through a first outlet 32 of the secondary solid-liquid separation device, and discharging the sewage mixture from a second outlet 33 of the secondary solid-liquid separation device.

And d, osmotic membrane filtration separation: and conveying the sewage mixture discharged from the secondary solid-liquid separation device 3 to the osmotic membrane filtration device 4 through a conveying pipeline III 34 and a feeding pump III 35 for osmotic membrane filtration separation, discharging the separated concentrated solution through a concentrated solution outlet 42, and discharging the solution through a clear solution outlet 43.

Step e, ultrasonic sterilization: the solution discharged from the osmotic membrane filtration device 4 is conveyed to the ultrasonic treatment device 5 through a conveying pipeline IV 44 and a feeding pump IV 45 for ultrasonic sterilization, COD reduction and phosphorus reduction treatment, and the solution after ultrasonic treatment is discharged from an outlet 52 of the ultrasonic treatment device.

Step f, activated carbon adsorption: the solution discharged from the ultrasonic treatment device 5 is conveyed to the activated carbon adsorption device 6 through a conveying pipeline five 53 and a feeding pump five 54 for decolorization, deodorization and COD reduction treatment, and the solution treated by the activated carbon adsorption device 6 is discharged from an outlet 62 of the activated carbon adsorption device.

Step g, solid-liquid separation for the third time: the solution discharged from the activated carbon adsorption device 6 is conveyed to the three-stage solid-liquid separation device 7 through the conveying pipeline six 33 and the feed pump six 64, solid-liquid separation is performed for the third time, the solid matter adsorbed by the activated carbon and the fine solid particles remaining in the solution are separated and discharged from the first outlet 72 of the three-stage solid-liquid separation device, and the separated solution is discharged from the second outlet 73 of the three-stage solid-liquid separation device.

Step h, filtering the quartz sand: the solution discharged from the three-stage solid-liquid separation device 7 is conveyed to the quartz sand filtering device 8 through a conveying pipeline seven 74 and a feeding pump seven 75, the quartz sand filtering is carried out, floccules floating in the solution and residual fine solid particles are blocked in the quartz sand, and clear liquid is discharged from an outlet 82 of the quartz sand filtering device.

Application example 2:

the treatment method of the farm waste treatment device in the application embodiment 3 is basically the same as the application embodiment 1, except that the method further comprises the following steps:

between step b and step c, there is also step b 1: and sequentially inputting and mixing an organic flocculant and an inorganic flocculant into the sewage mixture before the second-stage solid-liquid separation device 3 through the dosing device 9 to flocculate with the floating objects, so that the floating objects in the sewage mixture are separated out in the second-stage solid-liquid separation device 3.

Step h, after filtering the quartz sand, further comprising step i, cleaning by using reuse water:

the clear liquid discharged from the outlet 82 of the quartz sand filtration device is sent to the inlet 81 of the quartz sand filtration device, the inlet 71 of the third-stage solid-liquid separation device, the inlet 61 of the activated carbon adsorption device, the inlet 51 of the ultrasonic treatment device, the inlet 41 of the permeable membrane filtration device, the inlet 31 of the second-stage solid-liquid separation device, the inlet 21 of the first-stage solid-liquid separation device and the cleaning opening 15 of the dirt storage tank through the cleaning pipeline 83 and the cleaning water pump 84, and the quartz sand filtration device 8, the third-stage solid-liquid separation device 7, the activated carbon adsorption device 6, the ultrasonic treatment device 5, the permeable membrane filtration device 4, the second-stage solid-liquid separation device 3, the first-stage solid-liquid separation device 2, the dirt storage tank 1, and various pipelines, pumps and valves are cleaned respectively.

In the application example, the electric devices in each unit are electrically connected through the electric control system, so that the steps are automatically completed in sequence.

It is obvious to a person skilled in the art that the invention is not restricted to details of the embodiments presented above, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. 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 any reference signs in the claims shall not be construed as limiting the claim concerned. Moreover, according to the basic features of the present invention, several improvements and decorations can be made, which should also be considered as the protection scope of the present invention.

Claims (7)

1. A sewage treatment device for a farm comprises a sewage storage tank (1), a primary solid-liquid separation device (2), a permeable membrane filter device (4) and an ultrasonic treatment device (5) which are connected in series in sequence from a raw water inlet, namely a sewage storage tank inlet (11), to a clear water outlet, namely a quartz sand filter device outlet (82); the method is characterized in that: a second-stage solid-liquid separation device (3) is also arranged between the first-stage solid-liquid separation device (2) and the permeable membrane filtering device (4), and an activated carbon adsorption device (6), a third-stage solid-liquid separation device (7) and a quartz sand filtering device (8) are also sequentially arranged behind the ultrasonic treatment device (5) to the clear water outlet.

2. An apparatus according to claim 1, wherein:

the sewage storage tank (1) is provided with a sewage storage tank inlet (11) and a sewage storage tank outlet (12); the sewage storage tank (1) is connected with an inlet (21) of the primary solid-liquid separation device through a first conveying pipeline (13) and a first feeding pump (14) arranged in the first conveying pipeline (13);

the primary solid-liquid separation device (2) is provided with a primary solid-liquid separation device inlet (21), a primary solid-liquid separation device first outlet (22) and a primary solid-liquid separation device second outlet (23); a second outlet (23) of the primary solid-liquid separation device is connected with an inlet (31) of the secondary solid-liquid separation device through a second conveying pipeline (24) and a second feeding pump (25) arranged in the second conveying pipeline (24);

the secondary solid-liquid separation device (3) is provided with a secondary solid-liquid separation device inlet (31), a secondary solid-liquid separation device first outlet (32) and a secondary solid-liquid separation device second outlet (33); a second outlet (33) of the secondary solid-liquid separation device is connected with an inlet (41) of the permeable membrane filtering device through a third conveying pipeline (34) and a third feeding pump (35) arranged in the third conveying pipeline (34);

the osmotic membrane filtering device (4) is provided with an osmotic membrane filtering device inlet (41), a concentrated solution outlet (42) and a clear liquid outlet (43); the clear liquid outlet (43) is connected with an inlet (51) of the ultrasonic treatment device (5) through a conveying pipeline IV (44) and a feeding pump IV (45) arranged in the conveying pipeline IV (44);

the ultrasonic treatment device (5) is provided with an inlet (51) and an outlet (52) of the ultrasonic treatment device, and the outlet (52) of the ultrasonic treatment device is connected with an inlet (61) of the activated carbon adsorption device through a fifth conveying pipeline (53) and a fifth feeding pump (54) arranged in the fifth conveying pipeline (53);

the activated carbon adsorption device (6) is provided with an activated carbon adsorption device inlet (61) and an activated carbon adsorption device outlet (62), and the activated carbon adsorption device outlet (62) is connected with a three-stage solid-liquid separation device inlet (71) through a conveying pipeline six (63) and a feeding pump six (64) arranged in the conveying pipeline six (63);

the three-stage solid-liquid separation device (7) is provided with a three-stage solid-liquid separation device inlet (71), a three-stage solid-liquid separation device first outlet (72) and a three-stage solid-liquid separation device second outlet (73); a second outlet (73) of the three-stage solid-liquid separation device is connected with an inlet (81) of the quartz sand filtering device through a conveying pipeline seven (74) and a feeding pump seven (75) arranged in the conveying pipeline seven (74);

the quartz sand filtering device (8) is provided with a quartz sand filtering device inlet (81) and a quartz sand filtering device outlet (82).

3. An apparatus according to claim 1, wherein: the inlet of the permeable membrane filtering device (4) is provided with a first ultrasonic transducer acting cavity (46), the inlet (41) of the permeable membrane filtering device and the first ultrasonic transducer (47) are respectively arranged on the first ultrasonic transducer acting cavity (46), and the first ultrasonic transducer (47) is controlled by an ultrasonic driving power supply electrically connected with the first ultrasonic transducer.

4. An apparatus according to claim 2, wherein: the inlet (61) of the activated carbon adsorption device is a Venturi tee pipe (611), and the Venturi tee pipe (611) comprises a Venturi tee pipe inlet (6111), a Venturi tee pipe outlet (6112) and a Venturi tee pipe side inlet (6113); an inlet (6111) of the Venturi tee is communicated with a fifth conveying pipeline (53), an outlet (6112) of the Venturi tee is communicated with the activated carbon adsorption device (6), and an inlet (6113) at the side of the Venturi tee is connected with an activated carbon storage tank (66) through an activated carbon conveying pipe (65);

the inlet (6111) of the Venturi three-way pipe and the outlet (6112) of the Venturi three-way pipe are provided with a common central line I (6114), and a central line II (6115) of the inlet (6113) at the side of the Venturi three-way pipe is vertically intersected with the central line I (6114); the inlet (6111) of the Venturi three-way pipe is a conical hole which is gradually reduced from top to bottom; the outlet (6112) of the Venturi three-way pipe is a conical hole which is gradually reduced from bottom to top; the diameter d1 of the small end of the conical hole of the inlet (6111) of the Venturi tee pipe is consistent with the diameter d2 of the small end of the conical hole of the outlet (6112) of the Venturi tee pipe, and the small end of the conical hole of the inlet (6111) of the Venturi tee pipe is communicated with the small end of the conical hole of the outlet (6112) of the Venturi tee pipe through a straight hole (6116); the inlet (6113) at the side of the Venturi three-way pipe is a cylindrical hole and is communicated with the straight hole (6116).

5. An apparatus according to claim 1, wherein: the device is characterized by further comprising a cleaning pipeline (83), wherein the outlet (82) of the quartz sand filtering device is communicated with an inlet (81) of the quartz sand filtering device, an inlet (71) of a three-stage solid-liquid separation device, an inlet (61) of an activated carbon adsorption device, an inlet (51) of an ultrasonic treatment device, an inlet (41) of a permeable membrane filtering device, an inlet (31) of a two-stage solid-liquid separation device, an inlet (21) of a one-stage solid-liquid separation device and a cleaning opening (15) of a dirt storage tank through the cleaning pipeline (83) and a cleaning water pump (84) arranged in the cleaning pipeline (83) and close to one side of the quartz sand filtering device (8).

6. An apparatus according to claim 1, wherein: the primary solid-liquid separation device (2) and the secondary solid-liquid separation device (3) are both horizontal spiral sedimentation centrifuges; the three-stage solid-liquid separation device (7) is a flat centrifuge.

7. An apparatus according to claim 1, wherein: a dosing device (9) is also arranged between the first-stage solid-liquid separation device (2) and the second-stage solid-liquid separation device (3), and the dosing device (9) comprises a coagulant aid adding device (91) and a flocculant adding device (92);

the coagulant aid adding device (91) consists of a coagulant aid mixing tank (911), a first dosing pipeline (913) for communicating the coagulant aid mixing tank (911) with a second conveying pipeline (24), and a first dosing pump (912) in the first dosing pipeline (913), wherein the first dosing pipeline (913) is communicated with the second conveying pipeline (24) at a coagulant aid access point (914);

the flocculant adding device (92) consists of a flocculant mixing box (921), a second dosing pipeline (923) for communicating the flocculant mixing box (921) with the second conveying pipeline (24) and a second dosing pump (922) in the second dosing pipeline (923), wherein the second dosing pipeline (923) is communicated with the second conveying pipeline (24) at a flocculant access point (924);

in the second conveying pipeline (24), the coagulant aid access point (914) is positioned at one side close to the first-stage solid-liquid separation device (2); the flocculant access point (924) is positioned at one side close to the secondary solid-liquid separation device (3); a first static mixer (915) is connected between the coagulant aid access point (914) and the flocculant access point (924) in the second conveying pipeline (24); and a second static mixer (925) is also connected between the flocculant access point (924) in the second conveying pipeline (24) and the second-stage solid-liquid separation device (3).

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