CN104773860B - Farm pollution discharge waste liquid solid-liquid integrated separation methods and system - Google Patents

Farm pollution discharge waste liquid solid-liquid integrated separation methods and system Download PDF

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Publication number
CN104773860B
CN104773860B CN201510186393.4A CN201510186393A CN104773860B CN 104773860 B CN104773860 B CN 104773860B CN 201510186393 A CN201510186393 A CN 201510186393A CN 104773860 B CN104773860 B CN 104773860B
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liquid
solid
collecting tank
separation
pipeline section
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CN104773860A (en
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秦英林
钱瑛
秦英泽
薛峤
胡小山
朱建华
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Muyuan Foods Co Ltd
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Muyuan Foods Co Ltd
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Abstract

The invention discloses a kind of farm pollution discharge waste liquid solid-liquid integrated separation methods and system, its technical scheme is, by collecting tank, discharging tube and screen pipe, the waste liquid of discharging in pig house is carried out to primary separation, the solid matter that primary separation goes out enters filtrate basket by feed tube and carries out middle rank separation, the charging aperture that the isolated solid matter of middle rank enters screw input feeder by discharge nozzle carries out level separation at end, is discharged by drainage conduit through the isolated solid matter of whole level. Operation break-down of the present invention carries out comprehensive Separation of Solid and Liquid to the waste water of plant, and pig urine and pig manure are separated completely, is convenient to next step solid-liquid is processed respectively, reduces disposal cost, increases economic efficiency.

Description

Farm pollution discharge waste liquid solid-liquid integrated separation methods and system
Technical field:
The present invention relates to the method and system of a kind of plant waste liquid Separation of Solid and Liquid, particularly relate to a kind of farm pollution discharge waste liquid solid-liquid integrated separation methods and system.
Background technology:
My company is devoted to specialty and raises pigs, the scale of greatly developing is raised pigs, there is at present more than 20 pig farm, pig hundreds of thousands head is produced on each pig farm per year, and in order to improve meat level and the survival rate of pig, we adopt overhead type pig house, the bottom of pig house is provided with crevice board, the ight soil of pig flows in the feeder of below at any time, after collection, is for further processing again, ensures that the living environment of pig is clean.
The matter of utmost importance that large scale of pig farm brings is exactly the processing of waste water, badly will cause environmental pollution if processed, and can bring disaster near farmland pig farm when serious, causes farmland total crop failure, affects peasant's life. And pig farm sewage disposal can not only be stared in this link of production technology, and it should be regarded as to a system, so more be conducive to the development of large scale of pig farm field.
My company adopts and focuses on waste water, all Waste Water Centralized on a pig farm together, these waste water comprise pig urine, pig manure and flushing water, after concentrating, need to carry out Separation of Solid and Liquid, isolated solid is delivered to feed factory and is carried out organic fertilizer production, isolated liquid is sent into fermentation tank and is carried out biogas production, and biogas can throw light on, warms oneself and cook, and improves comprehensive utilization ratio.
The waste water on pig farm does not pass through initial stage Separation of Solid and Liquid at present, and Separation of Solid and Liquid is just in the end carried out on one sewage treatment process, and its workload is large, also need a large amount of special equipment, efficiency is low and cost is higher, thereby the wastewater treatment capacity on whole pig farm is very large, has reduced the economic benefit of enterprise.
Summary of the invention:
Technical problem to be solved by this invention is: overcome the deficiencies in the prior art, a kind of farm pollution discharge waste liquid solid-liquid integrated separation methods that adopts the measure of multiple tracks Separation of Solid and Liquid, good separating effect and increase work efficiency is provided, a kind of reasonable in design, easy manipulation, good separating effect and the comprehensive piece-rate system of lower-cost farm pollution discharge waste liquid solid-liquid are provided simultaneously.
Technical scheme of the present invention is:
A kind of farm pollution discharge waste liquid solid-liquid integrated separation methods, comprises the following steps:
A, elementary Separation of Solid and Liquid: the one end in pig house district arranges collecting tank, urine, ight soil and flushing water in pig house district in each independent pig house are all discharged in collecting tank, below collecting tank, bury discharging tube underground, bottom interval at collecting tank arranges screen pipe, the lower end of screen pipe is communicated with discharging tube, top and the top of screen pipe are arranged at intervals with filtering holes, liquid enters discharging tube by filtering holes and carries out elementary Separation of Solid and Liquid, and isolated solid deposits is in sump bottom and along collecting tank flow further downstream;
B, intermediate Separation of Solid and Liquid: a rotating turret is set in the centre of collecting tank, multiple filtrate baskets are evenly set on rotating turret, liquid drain hole all gathers on the body wall of each liquid basket, the top of head end filtrate basket is provided with feed tube, the below of tail end filtrate basket is provided with the groove that connects material, the solid matter that primary separation in collecting tank goes out enters filtrate basket by feed tube and carries out intermediate Separation of Solid and Liquid, and isolated solid matter enters the groove that connects material;
C, whole level Separation of Solid and Liquid: a screw input feeder is set, the discharge end of this screw input feeder is set to taper pipeline section, the helical blade of its inner chamber is also gradually small-sized, the two matches, liquid drain hole gathers on the body wall of taper pipeline section, the isolated solid matter of middle rank enters the charging aperture of screw input feeder by the discharge nozzle being communicated with the groove that connects material, carry out level Separation of Solid and Liquid at end, and isolated solid matter is discharged by drainage conduit.
On screen pipe, wrap up screen pack, adopt binding-type to fix, and the upper end of screen pipe exceeds the bottom surface of collecting tank.
Filtrate basket is connected with the bracing frame elasticity on rotating turret, on filtrate basket, vibrator is set, between job platform in the middle of rotating turret and collecting tank, rotary type is connected, between the two, be provided with driving mechanism, on the lower end of filtrate basket and feed tube, be provided with respectively motor-driven valve, all motor-driven valves are all connected with controller with driving mechanism, realize automatic feed liquor, rotation and discharge.
The taper pipeline section of screw input feeder is connected by bolt is movable with cylindricality pipeline section, is connected by bolt and drainage conduit are movable in the outlet of taper pipeline section, is provided with auxiliary support frame in drainage conduit lower end.
Below taper pipeline section, arrange and connect liquid bucket, connect liquid bucket and adopt cone bucket structure, its low side is provided with outlet, and the screw-conveyer-shaft of screw input feeder is connected with the auger motor in frame.
The comprehensive piece-rate system of a kind of farm pollution discharge waste liquid solid-liquid, comprise elementary equipment for separating liquid from solid, intermediate equipment for separating liquid from solid and whole level equipment for separating liquid from solid, described elementary equipment for separating liquid from solid comprises collecting tank, the below of described collecting tank is embedded with discharging tube, the bottom interval of described collecting tank arranges screen pipe, the lower end of described screen pipe is communicated with described discharging tube, and top and the top of described screen pipe are arranged at intervals with filtering holes; Described intermediate equipment for separating liquid from solid comprises collecting tank, the centre of described collecting tank arranges a rotating turret, multiple filtrate baskets are evenly set on described rotating turret, liquid drain hole all gathers on the body wall of filtrate basket described in each, described in head end, the top of filtrate basket is provided with feed tube, described in tail end, the below of filtrate basket is provided with the groove that connects material, described in the groove lower end that connects material be provided with discharge nozzle; The described equipment for separating liquid from solid of level eventually comprises a screw input feeder, and the discharge end of described screw input feeder is taper pipeline section, and the helical blade of its inner chamber is also gradually small-sized, and the two matches, and liquid drain hole gathers on the body wall of described taper pipeline section; In described collecting tank, isolated solid matter enters described filtrate basket by feed tube, the isolated solid matter of described filtrate basket enters the charging aperture of described screw input feeder by described discharge nozzle, the isolated solid matter of described screw input feeder is discharged by drainage conduit.
On described screen pipe, wrap up screen pack, adopt binding-type to fix, and the upper end of described screen pipe exceeds the bottom surface of described collecting tank.
Described filtrate basket is connected with the bracing frame elasticity on described rotating turret, on described filtrate basket, vibrator is set, between job platform in the middle of described rotating turret and described collecting tank, rotary type is connected, between the two, be provided with driving mechanism, on the lower end of described filtrate basket and described feed tube, be provided with respectively motor-driven valve, all described motor-driven valves are all connected with controller with described driving mechanism, realize automatic feed liquor, rotation and discharge.
The taper pipeline section of described screw input feeder is connected by bolt is movable with cylindricality pipeline section, and the outlet of described taper pipeline section is connected with described drainage conduit is movable by bolt, and described drainage conduit lower end is provided with auxiliary support frame.
The below of described taper pipeline section arranges and connects liquid bucket, described in connect liquid bucket and adopt cone bucket structure, its low side is provided with outlet, the screw-conveyer-shaft of described screw input feeder is connected with the auger motor in frame.
The invention has the beneficial effects as follows:
1, operation break-down of the present invention carries out comprehensive Separation of Solid and Liquid to the waste water of plant, and pig urine and pig manure are separated completely, is convenient to next step solid-liquid is processed respectively, reduces disposal cost, increases economic efficiency.
2, the present invention adopts screen pipe in the time of elementary Separation of Solid and Liquid, and filtering holes is set on screen pipe, pig urine and pig manure tentatively can be separated, in addition, on screen pipe, screen pack can also be set, increase filter effect, and can change at any time according to service condition, ensure filter effect.
3, the upper end of screen pipe of the present invention exceeds the bottom certain altitude of collecting tank, even also can carry out Separation of Solid and Liquid when wastewater sedimentation, now urine is carried out Separation of Solid and Liquid by the filtering holes at screen pipe top or top, improves separating effect.
4, the present invention adopts the uninterrupted rotation operation of multiple filtrate baskets in the time of intermediate Separation of Solid and Liquid, and efficiency is high, and has extended the filtrate time, improve filtrate separating effect, in addition, between filtrate basket and bracing frame, spring is set, more can increases filtrate effect by vibratory equipment is set.
5, rotating turret of the present invention, feed tube and filtrate basket all can adopt automatic control, realize a series of automatic operations of feed liquor, rotation, pause and discharge, reduce manually and drop into, and reduce labour intensity.
6, the present invention adopts the structure of cone spiral vane and taper pipeline section in the time of whole level Separation of Solid and Liquid, can push solidliquid mixture, is convenient to liquid to extrude, thereby realizes Separation of Solid and Liquid, and it belongs to powerful separation, thereby good separating effect.
7, the present invention, in the time pushing separation, due to extrusion friction, just produces a large amount of heats, and this heat can heat solidliquid mixture, plays the effect of oven dry, improves separating effect.
8, the present invention's manipulation reasonable in design, easy, good separating effect and cost are lower, applied widely, are especially applicable to the innoxious circular treatment of waste liquid of large-scale farming field, have good economic benefit after popularization.
Brief description of the drawings:
Fig. 1 is the structural representation of the comprehensive piece-rate system of farm pollution discharge waste liquid solid-liquid;
Fig. 2 is the top view of intermediate separator shown in Fig. 1.
Detailed description of the invention:
Embodiment mono-:
A kind of farm pollution discharge waste liquid solid-liquid integrated separation methods, comprises the following steps:
A, elementary Separation of Solid and Liquid: the one end in pig house district arranges collecting tank, urine, ight soil and flushing water in pig house district in each independent pig house are all discharged in collecting tank, below collecting tank, bury discharging tube underground, bottom interval at collecting tank arranges screen pipe, the lower end of screen pipe is communicated with discharging tube, top and the top of screen pipe are arranged at intervals with filtering holes, liquid enters discharging tube by filtering holes and carries out elementary Separation of Solid and Liquid, and isolated solid deposits is in sump bottom and along collecting tank flow further downstream;
B, intermediate Separation of Solid and Liquid: a rotating turret is set in the centre of collecting tank, multiple filtrate baskets are evenly set on rotating turret, liquid drain hole all gathers on the body wall of each liquid basket, the top of head end filtrate basket is provided with feed tube, the below of tail end filtrate basket is provided with the groove that connects material, the solid matter that primary separation in collecting tank goes out enters filtrate basket by feed tube and carries out intermediate Separation of Solid and Liquid, and isolated solid matter enters the groove that connects material;
C, whole level Separation of Solid and Liquid: a screw input feeder is set, the discharge end of this screw input feeder is set to taper pipeline section, the helical blade of its inner chamber is also gradually small-sized, the two matches, liquid drain hole gathers on the body wall of taper pipeline section, the isolated solid matter of middle rank enters the charging aperture of screw input feeder by the discharge nozzle being communicated with the groove that connects material, carry out level Separation of Solid and Liquid at end, and isolated solid matter is discharged by drainage conduit.
On screen pipe, wrap up screen pack, adopt binding-type to fix, be convenient to change at any time, ensure isolated by filtration effect, and the upper end of screen pipe exceeds the bottom surface of collecting tank, even if solid deposits also can be filtered.
Filtrate basket is connected with the bracing frame elasticity on rotating turret, on filtrate basket, vibrator is set, between job platform in the middle of rotating turret and collecting tank, rotary type is connected, between the two, be provided with driving mechanism, on the lower end of filtrate basket and feed tube, be provided with respectively motor-driven valve, all motor-driven valves are all connected with controller with driving mechanism, realize automatic feed liquor, rotation and discharge.
The taper pipeline section of screw input feeder is connected by bolt is movable with cylindricality pipeline section, is connected by bolt and drainage conduit are movable in the outlet of taper pipeline section, is provided with auxiliary support frame in drainage conduit lower end.
Below taper pipeline section, arrange and connect liquid bucket, connect liquid bucket and adopt cone bucket structure, its low side is provided with outlet, and the screw-conveyer-shaft of screw input feeder is connected with the auger motor in frame.
Operation break-down of the present invention carries out comprehensive Separation of Solid and Liquid to the waste water of plant, and pig urine and pig manure are separated completely, is convenient to next step solid-liquid is processed respectively, reduces disposal cost, increases economic efficiency.
Embodiment bis-: referring to Fig. 1-Fig. 2, in figure, 1-auxiliary support frame, 2-drainage conduit, 3-connects liquid bucket, 4-screw-conveyer-shaft, 5-helical blade, 6-taper pipeline section, 7-cylindricality pipeline section, 8-charging aperture, 9-frame, 10-auger motor, 11-discharge nozzle, the 12-groove that connects material, 13-filtrate basket, 14-bracing frame, 15-job platform, 16-rotating turret, 17-feed tube, 18-support bar, 19-collecting tank, 20-leakage fluid dram, 21-collecting tank, 22-inlet, 23-discharging tube, 24-gripper shoe, 25-screen pipe, 26-filtering holes.
The comprehensive piece-rate system of farm pollution discharge waste liquid solid-liquid, comprise elementary equipment for separating liquid from solid, middle rank equipment for separating liquid from solid and eventually level equipment for separating liquid from solid, wherein: elementary equipment for separating liquid from solid comprises collecting tank 21, collecting tank 21 is arranged on the one end in pig house district, urine in pig house district in each independent pig house, ight soil and flushing water are all discharged in collecting tank 21 by inlet 22, the upper end of collecting tank 21 is provided with gripper shoe 24, being convenient to personnel passes through, cover plate also can be set, the below of collecting tank 21 is embedded with discharging tube 23, the bottom interval of collecting tank 21 arranges screen pipe 25, the lower end of screen pipe 25 is communicated with discharging tube 23, the top of screen pipe 25 and top are arranged at intervals with filtering holes 26, middle rank equipment for separating liquid from solid comprises collecting tank 19, the centre of collecting tank 19 arranges a rotating turret 16, on rotating turret 16, evenly arranging in multiple filtrate basket 13(figure is four, can certainly be three or six, eight etc.), liquid drain hole all gathers on the body wall of each filtrate basket 13, be convenient to filtrate, the top of head end filtrate basket 13 is provided with feed tube 17, feed tube 17 is fixed on collecting tank 19 by support bar 18, the below of tail end filtrate basket 13 is provided with the groove 12 that connects material, can extend like this filtration time of filtrate basket, groove 12 lower ends that connect material are provided with discharge nozzle 11, level equipment for separating liquid from solid comprises a screw input feeder eventually, and the discharge end of screw input feeder is taper pipeline section 6, and the helical blade 5 of its inner chamber is also gradually small-sized, and the two matches, and the liquid drain hole that gathers on the body wall of taper pipeline section 6, is convenient to filtrate, in collecting tank 21, isolated solid matter enters filtrate basket 13 by feed tube 17, and the isolated solid matter of filtrate basket 13 enters the charging aperture 8 of screw input feeder by discharge nozzle 11, and the isolated solid matter of screw input feeder is discharged by drainage conduit 2.
On screen pipe 25, wrap up screen pack (not shown in FIG.), adopt binding-type to fix, be convenient to change, and the upper end of screen pipe 25 exceeds the bottom surface of collecting tank 21.
Preferred version: filtrate basket 13 is connected with bracing frame 14 elasticity on rotating turret 16, vibrator (not shown in FIG.) is set on filtrate basket 13, by vibration, increase isolated by filtration effect, between job platform 15 in the middle of rotating turret 16 and collecting tank 19, rotary type is connected, between the two, be provided with driving mechanism (not shown in FIG.), certainly, the two also can drive by manpower, on the lower end of filtrate basket 13 and feed tube 17, be provided with respectively motor-driven valve, all motor-driven valves are all connected with controller with driving mechanism, realize automatic feed liquor, rotation and discharge. The bottom of collecting tank 19 is provided with leakage fluid dram 20, and the liquid that filtrate basket 13 is discharged is gathered in the bottom of collecting tank 19, discharges if desired by leakage fluid dram 20.
The taper pipeline section 6 of screw input feeder is connected by bolt is movable with cylindricality pipeline section 7, can dismounting, be convenient to change, screen pack also can be set on the inwall of taper pipeline section 6 or outer wall, increase filter effect, increase the diameter of filtering holes simultaneously, reduce difficulty of processing, the outlet of taper pipeline section 6 is connected with drainage conduit 2 is movable by bolt, and drainage conduit 2 lower ends are provided with auxiliary support frame 1, solid and reliable.
The below of taper pipeline section 6 arranges and connects liquid bucket 3, connects liquid bucket 3 and adopts cone bucket structure, and its low side is provided with outlet, and the screw-conveyer-shaft 4 of screw input feeder is connected with the auger motor 10 in frame 9.
Operation break-down of the present invention carries out comprehensive Separation of Solid and Liquid to the waste water of plant, and pig urine and pig manure are separated completely, is convenient to next step solid-liquid is processed respectively, reduces disposal cost, increases economic efficiency.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all still belong in the scope of technical solution of the present invention.

Claims (10)

1. a farm pollution discharge waste liquid solid-liquid integrated separation methods, comprises the following steps:
A, elementary Separation of Solid and Liquid: the one end in pig house district arranges collecting tank, urine, ight soil and flushing water in pig house district in each independent pig house are all discharged in collecting tank, below collecting tank, bury discharging tube underground, bottom interval at collecting tank arranges screen pipe, the lower end of screen pipe is communicated with discharging tube, top and the top of screen pipe are arranged at intervals with filtering holes, liquid enters discharging tube by filtering holes and carries out elementary Separation of Solid and Liquid, and isolated solid deposits is in sump bottom and along collecting tank flow further downstream;
B, intermediate Separation of Solid and Liquid: a rotating turret is set in the centre of collecting tank, multiple filtrate baskets are evenly set on rotating turret, liquid drain hole all gathers on the body wall of each filtrate basket, the top of head end filtrate basket is provided with feed tube, the below of tail end filtrate basket is provided with the groove that connects material, the solid matter that primary separation in collecting tank goes out enters filtrate basket by feed tube and carries out intermediate Separation of Solid and Liquid, and isolated solid matter enters the groove that connects material;
C, whole level Separation of Solid and Liquid: a screw input feeder is set, the discharge end of this screw input feeder is set to taper pipeline section, the helical blade of its inner chamber is also gradually small-sized, the two matches, liquid drain hole gathers on the body wall of taper pipeline section, the isolated solid matter of middle rank enters the charging aperture of screw input feeder by the discharge nozzle being communicated with the groove that connects material, carry out level Separation of Solid and Liquid at end, and isolated solid matter is discharged by drainage conduit.
2. farm pollution discharge waste liquid solid-liquid integrated separation methods according to claim 1, is characterized in that: on screen pipe, wrap up screen pack, adopt binding-type to fix, and the upper end of screen pipe exceeds the bottom surface of collecting tank.
3. farm pollution discharge waste liquid solid-liquid integrated separation methods according to claim 1, it is characterized in that: filtrate basket is connected with the bracing frame elasticity on rotating turret, on filtrate basket, vibrator is set, between job platform in the middle of rotating turret and collecting tank, rotary type is connected, between the two, be provided with driving mechanism, on the lower end of filtrate basket and feed tube, be provided with respectively motor-driven valve, all motor-driven valves are all connected with controller with driving mechanism, realize automatic feed liquor, rotation and discharge.
4. farm pollution discharge waste liquid solid-liquid integrated separation methods according to claim 1, it is characterized in that: the taper pipeline section of screw input feeder is connected by bolt is movable with cylindricality pipeline section, outlet at taper pipeline section is connected by bolt and drainage conduit are movable, is provided with auxiliary support frame in drainage conduit lower end.
5. farm pollution discharge waste liquid solid-liquid integrated separation methods according to claim 1, it is characterized in that: below taper pipeline section, arrange and connect liquid bucket, connect liquid bucket and adopt cone bucket structure, its low side is provided with outlet, and the screw-conveyer-shaft of screw input feeder is connected with the auger motor in frame.
6. the comprehensive piece-rate system of farm pollution discharge waste liquid solid-liquid, comprise elementary equipment for separating liquid from solid, intermediate equipment for separating liquid from solid and whole level equipment for separating liquid from solid, it is characterized in that: described elementary equipment for separating liquid from solid comprises collecting tank, the below of described collecting tank is embedded with discharging tube, the bottom interval of described collecting tank arranges screen pipe, the lower end of described screen pipe is communicated with described discharging tube, and top and the top of described screen pipe are arranged at intervals with filtering holes; Described intermediate equipment for separating liquid from solid comprises collecting tank, the centre of described collecting tank arranges a rotating turret, multiple filtrate baskets are evenly set on described rotating turret, liquid drain hole all gathers on the body wall of filtrate basket described in each, described in head end, the top of filtrate basket is provided with feed tube, described in tail end, the below of filtrate basket is provided with the groove that connects material, described in the groove lower end that connects material be provided with discharge nozzle; The described equipment for separating liquid from solid of level eventually comprises a screw input feeder, and the discharge end of described screw input feeder is taper pipeline section, and the helical blade of its inner chamber is also gradually small-sized, and the two matches, and liquid drain hole gathers on the body wall of described taper pipeline section; In described collecting tank, isolated solid matter enters described filtrate basket by feed tube, and the isolated solid matter of described filtrate basket enters the charging aperture of screw input feeder by discharge nozzle, and the isolated solid matter of described screw input feeder is discharged by drainage conduit.
7. the comprehensive piece-rate system of farm pollution discharge waste liquid solid-liquid according to claim 6, is characterized in that: on described screen pipe, wrap up screen pack, adopt binding-type to fix, and the upper end of described screen pipe exceeds the bottom surface of described collecting tank.
8. the comprehensive piece-rate system of farm pollution discharge waste liquid solid-liquid according to claim 6, it is characterized in that: described filtrate basket is connected with the bracing frame elasticity on described rotating turret, on described filtrate basket, vibrator is set, between job platform in the middle of described rotating turret and described collecting tank, rotary type is connected, between the two, be provided with driving mechanism, on the lower end of described filtrate basket and described feed tube, be provided with respectively motor-driven valve, all described motor-driven valves are all connected with controller with described driving mechanism, realize automatic feed liquor, rotation and discharge.
9. the comprehensive piece-rate system of farm pollution discharge waste liquid solid-liquid according to claim 6, it is characterized in that: the taper pipeline section of described screw input feeder is connected by bolt is movable with cylindricality pipeline section, the outlet of described taper pipeline section is connected with described drainage conduit is movable by bolt, and described drainage conduit lower end is provided with auxiliary support frame.
10. the comprehensive piece-rate system of farm pollution discharge waste liquid solid-liquid according to claim 6, it is characterized in that: the below of described taper pipeline section arranges and connects liquid bucket, the described liquid bucket that connects adopts cone bucket structure, and its low side is provided with outlet, and the screw-conveyer-shaft of described screw input feeder is connected with the auger motor in frame.
CN201510186393.4A 2015-04-20 2015-04-20 Farm pollution discharge waste liquid solid-liquid integrated separation methods and system Active CN104773860B (en)

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CN112794473A (en) * 2020-12-25 2021-05-14 徐州市国栋生化装备有限公司 Intelligent industrial wastewater treatment system applying modified attapulgite

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JP2000246298A (en) * 1999-03-02 2000-09-12 Amukon Kk Sludge dehydrating apparatus
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