CN112159040A - Pig farm wastewater deep and efficient treatment system - Google Patents
Pig farm wastewater deep and efficient treatment system Download PDFInfo
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- CN112159040A CN112159040A CN202011056342.7A CN202011056342A CN112159040A CN 112159040 A CN112159040 A CN 112159040A CN 202011056342 A CN202011056342 A CN 202011056342A CN 112159040 A CN112159040 A CN 112159040A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
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- C02F3/00—Biological treatment of water, waste water, or sewage
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
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Abstract
The invention provides a deep and efficient pig farm wastewater treatment system which comprises a UF operation module and an RO operation module; the UF operation module comprises a raw water tank, a first security filter, a second security filter and a plurality of UF filters; the system also comprises a first denitrification tank, a second denitrification tank, a third denitrification tank, a UF water production water tank and a chemical cleaning medicine barrel; the RO operation module comprises a third security filter, a plurality of RO filters and an MBR tank. The invention also provides a process for treating and cleaning wastewater based on the pig farm wastewater deep and efficient treatment system, which realizes wastewater treatment and self-cleaning of pipelines and filters in the whole system through the change of the valve opening and closing combination.
Description
Technical Field
The invention relates to the field of environment-friendly water treatment, in particular to a deep and efficient treatment system for wastewater in a pig farm.
Background
Along with the development of animal husbandry in China, the industry competition is fierce day by day, the large-scale and intensive development of animal husbandry becomes a necessary trend, large-scale pig farms have higher livestock and poultry raising technologies, unified management is realized, the cost is reduced, the economic benefit is improved, but the problem of environmental pollution caused by the discharge of a large amount of concentrated excrement and urine sewage is more and more serious, and the population equivalent of excrement and urine pollution discharge of the livestock and poultry raising industry in large cities in China exceeds 3000-. The excrement and urine and the waste water of the breeding industry contain a large amount of organic matters, nitrogen, phosphorus, suspended matters and pathogenic bacteria and generate foul smell, so that the environment quality is greatly influenced, and the treatment is urgently needed. And because pig farm sewage treatment is different from general industrial sewage treatment, a large amount of organic matters and suspended matters easily cause the blockage of a filtering device, frequent cleaning and maintenance are needed, and the treatment cost is also increased.
Disclosure of Invention
Aiming at the problems, the invention provides a high-efficiency pig farm wastewater deep treatment system which combines UF ultrafiltration and RO reverse osmosis filtration technologies, adopts a UF filter and an RO filter with a back washing structure to be combined with various valve switches for use, and can realize a self-cleaning function;
the system comprises a UF operation module and an RO operation module;
the UF operation module comprises a raw water tank 11, a first security filter 21, a second security filter 22 and a plurality of UF filters 31; the system also comprises a first denitrification pool 41, a second denitrification pool 42, a third denitrification pool 43, a UF water production water tank 12 and a chemical cleaning medicine barrel 13;
the RO operation module comprises a third security filter 23, a plurality of RO filters 32 and an MBR tank 5;
the raw water tank 11 is connected with the water inlets of the UF filters 31 respectively after passing through the first security filter 21 and the water inlet electric valve D1 in sequence; the water outlet of the UF filter 31 is connected to the UF water production water tank 12 through a water production valve D7; the UF water production tank 12 is connected to the second security filter 22 through a clean water backwashing electric valve D9; the UF water production tank 12 is connected with the water inlets of the RO filters 32 after passing through the third security filter 23 and the RO water inlet electric valve D14 in sequence;
the wastewater outlet of the RO filter 32 is connected to the MBR tank 5 through an RO wastewater discharge electromagnetic valve YV 15;
the wastewater outlet of the RO filter 32 is connected to the chemical cleaning chemical barrel 13 through an RO chemical outlet electromagnetic valve YV 19;
the chemical cleaning medicine barrel 13 is connected with a second security filter 22 through a chemical cleaning medicine barrel valve YV 10;
the chemical cleaning chemical barrel 13 is connected with the water inlets of the UF filters 31 through a second security filter 22 and a chemical cleaning water inlet electromagnetic valve YV 2;
the chemical cleaning chemical barrel 13 is connected with the water outlets of the UF filters 31 through a second security filter 22 and a backwashing valve D8;
the chemical cleaning chemical barrel 13 is connected to the water inlet of the RO filter 32 through the second security filter 22 and an RO chemical cleaning inlet electromagnetic valve YV 18;
the water inlet of the UF filter 31 is connected with a third denitrification pool 43 through a backwashing discharge valve D3;
the flushing inlet of the UF filter 31 is connected with a compression fan 6 through a gas flushing valve YV 4;
the flushing outlet of the UF filter 31 is connected to the second denitrification tank 42 via a positive flushing discharge valve YV 11;
the flushing outlet of the UF filter 31 is connected with the first denitrification tank 41 through a concentrated water outlet valve D5;
the flushing outlet of the UF filter 31 is connected to the chemical cleaning chemical tank 13 via a chemical cleaning return valve YV 6.
Preferably, the water pump system further comprises a first water pump M1, a second water pump M2 and a third water pump M3; the fourth water pump M4; the first water pump M1 is arranged between the raw water tank 11 and the first safety filter 21; the second water pump M2 is arranged between the second cartridge filter 22 and the chemical cleaning chemical barrel 13; the third water pump M3 is arranged between the UF water production water tank 12 and the third security filter 23; the fourth water pump M4 is provided between the inlet of the third canister filter 23 and the RO filter 32.
Preferably, the device further comprises a sodium hypochlorite filling electromagnetic valve YV13, wherein one end of the sodium hypochlorite filling electromagnetic valve YV13 is connected with the water outlet of the UF filter 31, and the other end of the sodium hypochlorite filling electromagnetic valve YV13 is used for filling hypochlorous acid.
Preferably, the system also comprises a UF concentrated water outlet flow meter 71 arranged between the concentrated water outlet valve D5 and the first denitrification tank 41, and a UF water production flow meter 72 arranged between the water production valve D7 and the UF water production water tank; an RO pure water outlet solenoid valve YV17 and an RO pure water flow meter 73 which are communicated with the pure water outlet of the RO filter 32; an RO concentrate outlet solenoid valve YV16 communicating with the waste water outlet of the RO filter 32, and an RO waste water flowmeter 74.
The invention also provides a process for treating wastewater based on the pig farm wastewater advanced high-efficiency treatment system,
the method comprises an UF normal operation flow, an RO normal operation flow, an UF chemical backwashing flow and an RO chemical backwashing flow;
the UF normal operation flow comprises the following steps:
A1. forward washing, namely starting a first water pump M1, a water inlet electric valve D1 and a forward washing discharge valve YV11 for 30 seconds;
2.UF operation, starting a first water pump M1, a water inlet electric valve D1, a concentrated water outlet valve D5 and a water production valve D7, and starting for 25 minutes;
A3. air washing, namely opening an air washing valve YV4 and a positive flushing discharge valve YV11 for 40 seconds;
A4. backwashing, namely starting a second water pump M2, a clear water backwashing electric valve D9, a backwashing valve D8 and a backwashing discharge valve D3, and simultaneously starting a sodium hypochlorite filling electromagnetic valve YV13 for 40 seconds;
the RO normal operation flow comprises the following steps:
B1. flushing, starting a third water pump M3, an RO water inlet electric valve D14, an RO wastewater discharge electromagnetic valve YV15, and starting for 50 seconds;
running RO, starting a third water pump M3, a fourth water pump M4, an RO water inlet electric valve D14, an RO concentrated water outlet battery valve YV16 and an RO pure water outlet battery valve YV17 for 20 minutes;
the UF normal operation process and the RO normal operation process can be carried out simultaneously or respectively;
the UF chemical backwashing process comprises the following steps:
c1, UF chemical cleaning, starting a second water pump M2, opening a chemical cleaning medicine barrel valve YV10, a chemical cleaning water inlet electromagnetic valve YV2 and a chemical cleaning return valve YV6, and circulating for 30 minutes;
c2, UF is washed by clean water, a second water pump M2 is started, a clean water backwashing electric valve D9, a chemical cleaning water inlet electromagnetic valve YV2 and a chemical cleaning return valve YV6 are started, and the circulation time is 20 minutes;
the RO chemical backwashing process comprises the following steps:
starting a chemical cleaning chemical barrel valve YV10, a second water pump M2, an RO chemical cleaning inlet electromagnetic valve YV18, an RO chemical cleaning outlet electromagnetic valve YV19 and circulating for 30 minutes;
d2, washing the RO by clean water, starting a clean water backwashing electric valve D9, a second water pump M2, an RO wastewater discharge electromagnetic valve YV15 and an RO chemical washing inlet electromagnetic valve YV18, and washing for 10 minutes;
UF chemical backwashing flow and RO chemical backwashing flow can not be carried out at the same time;
UF normal operation flow and RO normal operation flow can not be carried out simultaneously with UF chemical backwashing flow and RO chemical backwashing flow.
Further, the water from the UF water tank 12 is added with a bactericide and a scale inhibitor before passing through the third cartridge filter 23.
Further, a low pressure protection is provided between the third canister filter 23 and the fourth water pump M4.
Further, a high pressure protection is provided at the water inlet of the RO filter 32.
Further, between the fourth water pump M4 and the RO inlet electro valve D14, conductivity measurements are made on the passing water.
Further, the conductivity of the passing water is measured between the pure water outlet of the RO filter 32 and the RO pure water outlet solenoid valve YV 17.
The invention provides a pig farm wastewater deep and efficient treatment system, which carries out deep and efficient treatment on pig farm wastewater through the combined design of various types of filters and electric valves.
Drawings
FIG. 1 is a schematic diagram of a UF operation module structure and operation of an embodiment of a deep and efficient pig farm wastewater treatment system provided by the invention.
FIG. 2 is a schematic diagram of the structure and operation of an RO operation module of an embodiment of the deep and efficient pig farm wastewater treatment system provided by the invention.
Wherein,
a raw water tank 11, a UF water production water tank 12 and a chemical cleaning medicine barrel 13;
a first security filter 21, a second security filter 22, a third security filter 23;
a UF filter 31, a RO filter 32;
a first denitrification tank 41, a second denitrification tank 42, a third denitrification tank 43;
an MBR tank 5 and a compression fan 6;
a UF concentrated water outlet flow meter 71, a UF produced water flow meter 72, an RO pure water flow meter 73 and an RO waste water flow meter 74;
a first water pump M1, a second water pump M2, a third water pump M3, a fourth water pump M4;
an electric water inlet valve D1, a backwashing discharge valve D3, a concentrated water outlet valve D5, a water production valve D7, a backwashing valve D8, an electric water backwashing valve D9 and an electric RO water inlet valve D14;
a chemical cleaning water inlet electromagnetic valve YV2, a gas cleaning valve YV4, a chemical cleaning return valve YV6, a chemical cleaning medicine barrel valve YV10, a positive cleaning discharge valve YV11 and a sodium hypochlorite filling electromagnetic valve YV 13;
an RO wastewater discharge electromagnetic valve YV15, an RO concentrated water outlet electromagnetic valve YV16, an RO pure water outlet electromagnetic valve YV17, an RO chemical drug washing inlet electromagnetic valve YV18 and an RO chemical drug washing outlet electromagnetic valve YV 19.
Detailed Description
In order that those skilled in the art will better understand the present invention, the present invention will now be further described with reference to the accompanying drawings and examples.
The UF operation module of the embodiment of the advanced high-efficiency pig farm wastewater treatment system shown in fig. 1 comprises a raw water tank 11, a first security filter 21, a second security filter 22, and two UF filters 31; the device also comprises a first denitrification pool 41, a second denitrification pool 42, a third denitrification pool 43, a UF water production water tank 12 and a chemical cleaning medicine barrel 13. Wherein, the UF filter is provided with a back flush structure and is provided with a flushing inlet and a flushing outlet. Wherein the first, second and third denitrification tanks are all primary denitrification tanks.
The raw water tank 11 passes through the first security filter 21 and the water inlet electric valve D1 in sequence and then is respectively connected with the water inlet of the UF filter 31; the water outlet of the UF filter 31 is connected to the UF water production water tank 12 through a water production valve D7; the UF product water tank 12 is connected to the second cartridge filter 22 by a clean water backwash electro valve D9.
The water inlet of the UF filter 31 is connected with a third denitrification pool 43 through a backwashing discharge valve D3; the flushing inlet of the UF filter 31 is connected with a compression fan 6 through a gas flushing valve YV 4; the flushing outlet of the UF filter 31 is connected to the second denitrification tank 42 through a positive flushing discharge valve YV11, connected to the first denitrification tank 41 through a concentrate outlet valve D5, and connected to the chemical cleaning chemical tank 13 through a chemical cleaning return valve YV 6.
The chemical cleaning medicine barrel 13 is connected with a second security filter 22 through a chemical cleaning medicine barrel valve YV 10; the water inlet of the UF filter 31 is connected with a second security filter 22 and a chemical cleaning water inlet electromagnetic valve YV 2; the water outlets of the UF filters 31 are connected through a second security filter 22 and a backwashing valve D8; connected to the water inlet of the RO filter 32 via the second cartridge filter 22 and the RO chemical wash inlet solenoid valve YV 18.
The device also comprises a sodium hypochlorite filling electromagnetic valve YV13, one end of the sodium hypochlorite filling electromagnetic valve YV13 is connected with the water outlet of the UF filter 31, and the other end of the sodium hypochlorite filling electromagnetic valve YV13 is used for filling hypochlorous acid.
The RO operation module of the pig farm wastewater advanced high-efficiency treatment system of the embodiment shown in FIG. 2 comprises a third cartridge filter 23, three RO filters 32, and an MBR (membrane bioreactor) tank 5;
the UF water production tank 12 passes through the third security filter 23 and the RO water inlet electric valve D14 in sequence and then is respectively connected with the water inlet of the RO filter 32.
The wastewater outlet of the RO filter 32 is connected to the MBR tank 5 through an RO wastewater discharge electromagnetic valve YV 15; the wastewater outlet of the RO filter 32 is connected to the chemical cleaning chemical tank 13 through an RO chemical outlet solenoid valve YV 19.
In order to accelerate the circulating treatment speed of the wastewater in the treatment system, a first water pump M1, a second water pump M2, a third water pump M3 and a fourth water pump M4 are also arranged in the system for pressurization; the first water pump M1 is arranged between the raw water tank 11 and the first safety filter 21; the second water pump M2 is arranged between the second cartridge filter 22 and the chemical cleaning chemical barrel 13; the third water pump M3 is arranged between the UF water production water tank 12 and the third security filter 23; the fourth water pump M4 is provided between the inlet of the third canister filter 23 and the RO filter 32.
In order to facilitate the measurement of water flow in the system, the system further comprises a UF concentrated water outlet flow meter 71 arranged between the concentrated water outlet valve D5 and the first denitrification tank 41, and a UF water production flow meter 72 arranged between the water production valve D7 and the UF water production water tank; an RO pure water outlet solenoid valve YV17 and an RO pure water flow meter 73 which are communicated with the pure water outlet of the RO filter 32; an RO concentrate outlet solenoid valve YV16 communicating with the waste water outlet of the RO filter 32, and an RO waste water flowmeter 74.
The invention also provides a process for treating wastewater based on the pig farm wastewater deep and efficient treatment system, and the flow of the process is further explained.
In practice, the method mainly comprises a UF normal operation flow for filtering wastewater, an RO normal operation flow, a UF chemical backwashing flow for self-cleaning a system and an RO chemical backwashing flow;
the UF normal operation flow comprises the following steps:
A1. forward washing, namely starting a first water pump M1, a water inlet electric valve D1 and a forward washing discharge valve YV11 for 30 seconds; introducing the wastewater in the raw water tank into a first safety filter and a UF filter for flushing pipelines and filters, and introducing the flushed water into a second denitrification tank.
2.UF operation, starting a first water pump M1, a water inlet electric valve D1, a concentrated water outlet valve D5 and a water production valve D7, and starting for 25 minutes; at the moment, after the wastewater in the raw water tank is treated by the UF filter, clear water enters the UF water production water tank, and concentrated water enters the first denitrification tank.
A3. Air washing, namely opening an air washing valve YV4 and a positive flushing discharge valve YV11 for 40 seconds; the external compressor blower of air purge valve, at this moment, uses compressed air to wash the UF filter, because there is a large amount of suspended solids in the pig farm waste water, consequently need adopt the mode of air purge to wash it out, otherwise easily cause UF filter's jam, also do not benefit to follow-up backwash.
A4. Backwashing, namely starting a second water pump M2, a clear water backwashing electric valve D9, a backwashing valve D8 and a backwashing discharge valve D3, and simultaneously starting a sodium hypochlorite filling electromagnetic valve YV13 for 40 seconds; and at the moment, the clean water in the UF water production tank is filtered by the second security filter, the UF filter is cleaned, and the cleaned water is discharged into the third denitrification tank.
The RO normal operation flow comprises the following steps:
B1. flushing, starting a third water pump M3, an RO water inlet electric valve D14, an RO wastewater discharge electromagnetic valve YV15, and starting for 50 seconds; the water introduced into the UF water production tank is used for carrying out primary flushing and dredging on the RO filter.
Running RO, starting a third water pump M3, a fourth water pump M4, an RO water inlet electric valve D14, an RO concentrated water outlet battery valve YV16 and an RO pure water outlet battery valve YV17 for 20 minutes; and (4) carrying out RO reverse osmosis filtration treatment on the water introduced into the UF water production tank.
Because the UF water production tank is used as intermediate storage, the UF normal operation process and the RO normal operation process can be carried out simultaneously or respectively.
The UF chemical backwashing process comprises the following steps:
c1, UF chemical cleaning, starting a second water pump M2, opening a chemical cleaning medicine barrel valve YV10, a chemical cleaning water inlet electromagnetic valve YV2 and a chemical cleaning return valve YV6, and circulating for 30 minutes; and introducing the liquid medicine in the chemical cleaning medicine barrel into the UF filter for circular cleaning.
C2, UF is washed by clean water, a second water pump M2 is started, a clean water backwashing electric valve D9, a chemical cleaning water inlet electromagnetic valve YV2 and a chemical cleaning return valve YV6 are started, and the circulation time is 20 minutes; and introducing clean water in the UF water production tank into the UF filter for circular cleaning.
The RO chemical backwashing process comprises the following steps:
starting a chemical cleaning chemical barrel valve YV10, a second water pump M2, an RO chemical cleaning inlet electromagnetic valve YV18, an RO chemical cleaning outlet electromagnetic valve YV19 and circulating for 30 minutes; and introducing the liquid medicine in the chemical cleaning medicine barrel into the RO filter for circular cleaning.
D2, washing the RO by clean water, starting a clean water backwashing electric valve D9, a second water pump M2, an RO wastewater discharge electromagnetic valve YV15 and an RO chemical washing inlet electromagnetic valve YV18, and washing for 10 minutes; and introducing clear water in the UF water production tank into an RO filter for washing, and introducing the washed water into an MBR tank for treatment.
The design of a system pipeline mechanism, the UF chemical backwashing flow and the RO chemical backwashing flow can not be carried out simultaneously; UF normal operation flow and RO normal operation flow can not be carried out simultaneously with UF chemical backwashing flow and RO chemical backwashing flow.
In addition, the water flowing out of the UF water production water tank 12 is added with a bactericide and a scale inhibitor before passing through the third security filter 23, so that the blocking probability of the third security filter and a subsequent RO filter is reduced; a pressure switch is arranged at the inlet of the first security filter 21, low-pressure protection is arranged between the third security filter 23 and the fourth water pump M4, and high-pressure protection is arranged at the water inlet of the RO filter 32 to protect the third security filter and the RO filter and prevent equipment damage caused by too large or too small water pressure.
The water treatment quality is evaluated by measuring the conductivity of the passing water between the fourth water pump M4 and the RO water inlet electric valve D14, and between the pure water outlet of the RO filter 32 and the RO pure water outlet electromagnetic valve YV 17.
While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the scope of the included claims.
Claims (10)
1. Pig farm waste water degree of depth high-efficient processing system, its characterized in that:
the system comprises a UF operation module and an RO operation module;
the UF operation module comprises a raw water tank (11), a first security filter (21), a second security filter (22) and a plurality of UF filters (31); the device also comprises a first denitrification pool (41), a second denitrification pool (42), a third denitrification pool (43), a UF water production water tank (12) and a chemical cleaning medicine barrel (13);
the RO operation module comprises a third security filter (23), a plurality of RO filters (32) and an MBR pool (5);
the raw water tank (11) is connected with the water inlets of the UF filters (31) respectively after passing through the first security filter (21) and the water inlet electric valve (D1) in sequence; the water outlet of the UF filter (31) is connected to the UF water production water tank (12) through a water production valve (D7); the UF water production tank (12) is connected to the second security filter (22) through a clean water backwashing electric valve (D9); the UF water production tank (12) is connected with the water inlets of the RO filters (32) respectively after passing through the third security filter (23) and the RO water inlet electric valve (D14);
the wastewater outlet of the RO filter (32) is connected to the MBR tank (5) through an RO wastewater discharge electromagnetic valve (YV 15); a wastewater outlet of the RO filter (32) is connected to the chemical cleaning chemical barrel (13) through an RO chemical washing outlet electromagnetic valve (YV 19);
the chemical cleaning medicine barrel (13) is connected with a second security filter (22) through a chemical cleaning medicine barrel valve (YV 10);
the chemical cleaning medicine barrel (13) is connected with the water inlets of the UF filters (31) through a second security filter (22) and a chemical cleaning water inlet electromagnetic valve (YV 2);
the chemical cleaning medicine barrel (13) is connected with the water outlets of the UF filters (31) through a second security filter (22) and a backwashing valve (D8);
the chemical cleaning chemical barrel (13) is connected to the water inlet of the RO filter (32) through a second security filter (22) and an RO chemical cleaning inlet electromagnetic valve (YV 18);
the water inlet of the UF filter (31) is connected with a third denitrification pool (43) through a backwashing discharge valve (D3);
the flushing inlet of the UF filter (31) is connected with a compression fan (6) through a gas flushing valve (YV 4);
the flushing outlet of the UF filter (31) is connected with the second denitrification pool (42) through a positive flushing discharge valve (YV 11);
the flushing outlet of the UF filter (31) is connected with the first denitrification pool (41) through a concentrated water outlet valve (D5);
the flushing outlet of the UF filter (31) is connected to the chemical cleaning medicine barrel (13) through a chemical cleaning return valve (YV 6).
2. The pig farm wastewater deep and efficient treatment system according to claim 1, characterized in that: the water pump further comprises a first water pump (M1), a second water pump (M2) and a third water pump (M3); a fourth water pump (M4); the first water pump (M1) is arranged between the raw water tank (11) and the first safety filter (21); the second water pump (M2) is arranged between the second security filter (22) and the chemical cleaning medicine barrel (13); the third water pump (M3) is arranged between the UF water production water tank (12) and the third security filter (23); the fourth water pump (M4) is arranged between the third security filter (23) and the water inlet of the RO filter (32).
3. The pig farm wastewater deep and efficient treatment system according to claim 1, characterized in that: still include sodium hypochlorite filling solenoid valve (YV13), the delivery port of UF filter (31) is connected to sodium hypochlorite filling solenoid valve (YV13) one end, and the other end is used for filling hypochlorous acid.
4. The pig farm wastewater deep and efficient treatment system according to claim 1, characterized in that: the system also comprises a UF concentrated water outlet flow meter (71) arranged between the concentrated water outlet valve (D5) and the first denitrification tank (41), and a UF water production flow meter (72) arranged between the water production valve (D7) and the UF water production water tank (12); an RO pure water outlet electromagnetic valve (YV17) and an RO pure water flow meter (73) which are communicated with the pure water outlet of the RO filter (32); an RO concentrated water outlet electromagnetic valve (YV16) communicated with the wastewater outlet of the RO filter (32), and an RO wastewater flowmeter (74).
5. The utility model provides a technology based on pig farm waste water degree of depth high-efficient processing system carries out waste water treatment which characterized in that:
the method comprises an UF normal operation flow, an RO normal operation flow, an UF chemical backwashing flow and an RO chemical backwashing flow;
the UF normal operation flow comprises the following steps:
A1. forward washing, namely starting a first water pump (M1), a water inlet electric valve (D1), a forward washing discharge valve (YV11) and opening for 30 seconds;
UF operation, starting a first water pump (M1), a water inlet electric valve (D1), a concentrated water outlet valve (D5) and a water production valve (D7), and starting for 25 minutes;
A3. air washing, namely opening an air washing valve (YV4) and a positive flushing discharge valve (YV11) for 40 seconds;
A4. backwashing, namely starting a second water pump (M2), a clean water backwashing electric valve (D9), a backwashing valve (D8), a backwashing discharge valve (D3), and simultaneously starting a sodium hypochlorite filling electromagnetic valve (YV13) for 40 seconds;
the normal running process of the RO comprises the following steps:
B1. flushing, starting a third water pump (M3), an RO water inlet electric valve (D14), an RO wastewater discharge electromagnetic valve (YV15) and opening for 50 seconds;
running RO, starting a third water pump (M3), a fourth water pump (M4), an RO water inlet electric valve (D14), an RO concentrated water outlet cell valve (YV16), an RO pure water outlet cell valve (YV17) and starting for 20 minutes;
the UF normal operation process and the RO normal operation process can be carried out simultaneously or respectively;
the UF chemical backwashing process comprises the following steps:
c1.uf chemical cleaning, starting a second water pump (M2), a chemical cleaning medicine barrel valve (YV10), a chemical cleaning water inlet electromagnetic valve (YV2) and a chemical cleaning return valve (YV6), and circulating for 30 minutes;
c2.UF clean water flushing, starting a second water pump (M2), a clean water backwashing electric valve (D9), a chemical cleaning water inlet electromagnetic valve (YV2) and a chemical cleaning return valve (YV6), and circulating for 20 minutes;
the RO chemical backwashing process comprises the following steps:
starting a chemical cleaning chemical barrel valve (YV10), a second water pump (M2), an RO chemical cleaning inlet electromagnetic valve (YV18), an RO chemical cleaning outlet electromagnetic valve (YV19) and circulating for 30 minutes;
RO clean water washing, starting a clean water backwashing electric valve (D9), a second water pump (M2), an RO wastewater discharge electromagnetic valve (YV15), an RO chemical medicine washing inlet electromagnetic valve (YV18) and washing time of 10 minutes;
the UF chemical backwashing flow and the RO chemical backwashing flow can not be carried out simultaneously;
the UF normal operation flow and the RO normal operation flow can not be performed simultaneously with the UF chemical backwashing flow and the RO chemical backwashing flow.
6. The process for wastewater treatment based on the pig farm wastewater advanced high-efficiency treatment system according to claim 5, characterized in that: and the water flowing out of the UF water production water tank (12) is added with a bactericide and a scale inhibitor before passing through a third security filter (23).
7. The process for wastewater treatment based on the pig farm wastewater advanced high-efficiency treatment system according to claim 5, characterized in that: a low-pressure protection is arranged between the third security filter (23) and the fourth water pump (M4).
8. The process for wastewater treatment based on the pig farm wastewater advanced high-efficiency treatment system according to claim 5, characterized in that: the water inlet of the RO filter (32) is provided with high-pressure protection.
9. The process for wastewater treatment based on the pig farm wastewater advanced high-efficiency treatment system according to claim 5, characterized in that: between the fourth water pump (M4) and the RO inlet electro valve (D14), conductivity measurements were made on the water flowing through.
10. The process for wastewater treatment based on the pig farm wastewater advanced high-efficiency treatment system according to claim 5, characterized in that: the conductivity of the water flowing through the RO filter (32) is measured between the pure water outlet and the RO pure water outlet solenoid valve (YV 17).
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