CN105036455A - Refined cotton wastewater treatment system - Google Patents

Abstract

The invention relates to a refined cotton wastewater treatment system, comprising a wastewater regulating tank, an enhanced air flotation tank, an ozone oxidation coagulation sedimentation tank, a baffle packing type anoxic anaerobic reaction tank, an aerobic contact oxidation tank, a secondary sedimentation tank, and a decolorization tank and sand filter; the enhanced air flotation tank consists of mud sand area, mixing area and separation area from bottom to top; the ozonation coagulation sedimentation tank includes aeration mixing area and sedimentation area; The flow plate is divided into facultative, anoxic and anaerobic sections; the aerobic contact oxidation tank is equipped with a water inlet pipe, a water distribution triangle cone and an aeration control system; the wastewater enters the enhanced air flotation tank through the adjustment tank to remove scum, and then The wastewater enters the ozone oxidation coagulation sedimentation tank, the pollutants are oxidized, decomposed and precipitated, and then the wastewater enters the baffle packing type anoxic anaerobic reaction tank and the aerobic contact oxidation tank for anoxic, anaerobic and aerobic reactions. Discharge up to standard after decolorization and filtration.

Description

A Refined Cotton Wastewater Treatment System

technical field

The invention relates to the technical field of wastewater treatment, in particular to a refined cotton wastewater treatment system.

Background technique

Refined cotton wastewater is mainly composed of cooking black liquor, coarse washing and rinsing water, and fine washing and rinsing water. The wastewater contains a large amount of impurities such as cotton linters. Cotton linters are lignin substances. Refined cotton wastewater is strongly alkaline, dark brown in color, high in biochemical oxygen demand (BOD) and chemical oxygen demand (COD), complex in composition, and poor in biodegradability, which brings great difficulties to the treatment of refined cotton wastewater .

Most refined cotton production enterprises refer to the middle-stage wastewater treatment methods of other papermaking enterprises when treating refined cotton wastewater, mainly adopting a combination of physicochemical and biochemical treatment processes. Adjust water quality and water quantity; biochemical treatment usually adopts hydrolysis acidification and contact oxidation process.

Refined cotton wastewater treatment projects have not been very successful in China. Therefore, it is urgent to find a reliable and stable treatment process and method to treat refined cotton wastewater up to the standard.

Contents of the invention

The technical problem to be solved by the present invention is: in order to solve the above difficult problems in the treatment of refined cotton wastewater, the present invention provides a refined cotton wastewater treatment system.

The technical solution adopted by the present invention to solve the technical problem is: a refined cotton wastewater treatment system, including a wastewater regulating tank, an enhanced air flotation tank, an ozone oxidation coagulation sedimentation tank, a baffle packing type anoxic anaerobic reaction tank, an aerobic Contact oxidation tank, secondary settling tank, decolorization tank and sand filter tank; the wastewater conditioning tank, enhanced air flotation tank, ozone oxidation coagulation sedimentation tank, baffle packing type anoxic anaerobic reaction tank, aerobic contact oxidation tank, secondary The settling tank, the decolorizing tank and the sand filter tank are connected in sequence.

The wastewater regulating tank includes a water inlet pipe and a water outlet pipe for regulating the water quality and quantity of the refined cotton wastewater.

The enhanced air flotation tank includes a water inlet pipe and an outlet pipe for discharging treated water. The enhanced air flotation tank includes a mud sand area, a mixing area and a separation area from bottom to top; the separation area includes a water collection area and The slag collection area located in the water collection area; an aeration pan is arranged between the mud sand area and the mixing area of the enhanced air flotation tank, and a water distribution branch pipe is arranged above the aeration disk, and the water distribution branch pipe is connected to The water inlet pipe, the aeration plate is connected to the fan outside the enhanced air flotation tank through the aeration pipe; a three-phase separator is provided in the separation area, and the three-phase separator includes a deflector and a deflector located on the deflector The triangular deflector ring used in conjunction with the deflector below, the triangular deflector ring is installed on the inner wall of the enhanced air flotation pool, the upper part of the deflector is the same shape as the separation area, the deflector The lower part is trumpet-shaped, and the inner diameter of the lower part of the deflector is larger than the inner diameter of the triangular guide ring; the upper part of the outer wall of the separation zone is provided with an overflow weir, and the overflow weir is connected to the outlet pipe; The slag collection area is equipped with a scum scraper and a scum tank; when the wastewater overflows from bottom to top, the water and scum enter the lower part of the deflector through the triangular diversion ring, and the scum continues to enter the scum collection area upwards, and the water passes through The gap between the deflector plate and the triangular deflector ring enters the catchment area; for better wastewater treatment, the water distribution branch pipe is set in a concentric circle shape or a cross shape, and the water distribution branch pipe has a horizontal radiation outlet; Further, the aeration pan is a microporous aeration pan with micropores evenly arranged; due to the different densities of water and sediment, the separation is realized under the action of a three-phase separator; in order to discharge the treated sediment, the There is a sediment discharge valve at the bottom of the above-mentioned enhanced air flotation tank.

The water outlet pipe of the enhanced air flotation tank communicates with the water inlet pipe of the ozone oxidation coagulation sedimentation tank.

The ozone oxidation coagulation sedimentation tank includes an aeration mixing area and a sedimentation area, an ozone aeration pan is arranged at the bottom of the aeration mixing area, and a water distribution branch pipe is arranged above the ozone aeration pan, and the water distribution The branch pipe is connected to the water inlet pipe, and the ozone aeration pan is connected to the fan outside the ozone oxidation coagulation sedimentation tank through the aeration pipe, and the fan is connected to the ozone generator through the pipeline; The inner wall of the sedimentation tank forms a waste water flow channel for the wastewater to enter the sedimentation area. A three-phase separator is installed at the outlet of the sedimentation area. An overflow weir is installed on the upper part of the outlet of the sedimentation area. The bottom of the sedimentation area is designed as a conical structure. There is a mud discharge valve; the middle and upper part of the aeration mixing zone is equipped with a liquid medicine adding system.

The baffle packing type anoxic anaerobic reaction tank includes a partoxic section, anoxic section and anaerobic section separated by baffle plates, and the head end of the partaerobic section is provided with an inlet pipe for feeding waste water, and The end of the oxygen section is connected to the head of the anoxic section, and the end of the anoxic section is connected to the head of the anaerobic section. The lower part of the baffle plate on the water inlet side of the anoxic section and the anaerobic section is provided with a 45-degree corner to prevent water from entering The impact effect generated during the time, so as to play the role of buffering water flow and uniform water distribution; the end of the anaerobic section is equipped with a three-phase separator and overflow weir, and the overflow weir is connected to the outlet pipe; the aerobic section, anoxic section and anaerobic section The bottom is designed as a conical structure, and the conical structure is connected to the sludge discharge valve; the facultative section, anoxic section and anaerobic section of the baffle packing type anoxic anaerobic reaction tank are designed as a conical structure. The top of the structure is equipped with an independent methane exhaust gas collection pipe. Fillers are all provided in the facultative oxygen section, anoxic section and anaerobic section.

The middle and lower part of the aerobic contact oxidation tank is provided with a water inlet pipe, and the lower part of the water inlet pipe is provided with a water distribution triangle cone; the lower part of the water distribution triangle cone is provided with an aeration control system, and the aeration control system includes an aeration plate , a blower and a dissolved oxygen measurement and control device; further, the aeration pan is a microporous aeration pan with micropores evenly arranged thereon, and the aeration pan is connected to the blower through an aeration tube, and the blower is arranged at the aerobic contact oxidation Outside the pool, a dissolved oxygen measurement and control device is set on the upper part of the aerobic contact oxidation tank and under the surface of the wastewater, and the dissolved oxygen measurement and control device regulates the work of the blower according to the oxygen capacity; the aerobic contact oxidation tank has built-in fillers; the aerobic An overflow weir is arranged at the water outlet of the contact oxidation tank.

The outlet pipe of the aerobic contact oxidation tank is connected to the secondary sedimentation tank, and the bottom of the secondary sedimentation tank is provided with a sludge return system, and a part of the sludge is returned to the baffle packing type anoxic anaerobic reaction tank.

The water after sedimentation treatment in the secondary sedimentation tank enters the decolorization tank and sand filter tank through the overflow weir, and is discharged after being filtered.

A kind of method that adopts above-mentioned refined cotton waste water treatment system to carry out waste water treatment, has following steps:

① Refined cotton waste water enters the waste water regulating tank through the water inlet pipe to adjust the water quality and water quantity.

② Then the wastewater enters the middle and lower part of the separation zone of the enhanced air flotation tank through the water inlet pipe; the aeration disc located under the water inlet pipe of the enhanced air flotation tank generates a large number of fine air bubbles to cause friction in the solid matter in the wastewater and remove other pollutants on the solid matter; aeration The fine air bubbles produced by the air pan adhere to the floating objects to form a mixture that rises under the action of buoyancy. Under the action of the three-phase separator in the separation area of the enhanced air flotation tank, the mixture rises to the slag collection area. Under the action of the slag scraper, The scum enters the scum tank and is cleaned and transported abroad; the sediment sinks to the mud and sand area at the lower part of the enhanced air flotation tank under the action of gravity, and is discharged through the sediment discharge valve at the bottom of the enhanced air flotation tank; the separated water is in the enhanced air flotation tank. The deflector in the three-phase separation area of the floating tank enters the water collection area of the enhanced air flotation tank under the action of the deflector, and is connected to the water inlet pipe of the ozone oxidation coagulation sedimentation tank through the overflow weir, the outlet pipe and the connecting pipe.

③Wastewater enters the middle and lower part of the ozone oxidation coagulation sedimentation tank through the water inlet pipe and the water distribution branch pipe of the ozone oxidation coagulation sedimentation tank; the ozone aeration plate located below the water distribution branch pipe of the ozone oxidation coagulation sedimentation tank produces a large number of fine air bubbles to make the waste water At the same time, the macromolecular substances in the wastewater are oxidized into small molecular substances that are easy to absorb and absorb. The oxidized and decomposed wastewater is mixed with the coagulant and then enters the sedimentation area. The three-phase separator in the sedimentation area realizes mud-water separation. The sludge sinks to the lower part of the sedimentation zone of the ozonation coagulation sedimentation tank under the action of gravity, and is discharged through the sludge discharge valve at the bottom; the waste water is connected to the baffle packing anoxic anaerobic reaction through the overflow weir, the outlet pipe and the connecting pipe The water inlet pipe of the pool.

④Wastewater enters the lower part of the baffle packing anoxic anaerobic reaction tank through the inlet pipe of the aerobic section of the baffle packing anoxic anaerobic reaction tank; Advance up and down, and pass through the sludge bed of each reaction chamber in the facultative, anoxic and anaerobic sections in turn. The sludge in the reaction tank moves with the up and down flow of wastewater and the rise of biogas. The baffles The blocking effect and the sedimentation effect of the sludge itself reduce the flow rate of the sludge, so a large amount of sludge is trapped in the reaction tank, and the microorganisms in the reaction tank fully contact with the organic matter in the wastewater. The facultative bacteria in the facultative stage, the heterotrophic bacteria in the anoxic stage and the anaerobic stage hydrolyze the organic matter in the wastewater into organic acids, decompose the macromolecular organic matter into small molecular organic matter, and convert the insoluble organic matter into soluble organic matter.

⑤After the anaerobic reaction, the three-phase separator at the end of the anaerobic section realizes the separation of mud, water and methane gas, and the sludge sinks under the action of gravity to the baffle packing type anoxic anaerobic reaction tank. In the lower part, the excess sludge is discharged through the sludge discharge valve at the bottom; the methane waste gas generated by the baffle packing type anoxic anaerobic reaction tank is collected and discharged through the gas collection pipe at the top of the reaction tank; the treated wastewater passes through the overflow weir, the outlet pipe and the connection The pipe is connected with the water inlet pipe of the aerobic contact oxidation tank.

⑥Wastewater enters the middle and lower part of the aerobic contact oxidation tank through the water inlet pipe, and the water is evenly distributed under the action of the water distribution triangle cone. Micro-bubbles, the dissolved oxygen measurement and control device regulates the work of the blower according to the oxygen capacity to ensure that the dissolved oxygen in the aerobic contact oxidation pool water is greater than 2mg/L, and the treated wastewater flows out through the overflow weir and the outlet pipe.

⑦The outlet pipe of the aerobic contact oxidation tank is connected to the water distribution pipe of the secondary sedimentation tank, and part of the sedimentation sludge in the secondary sedimentation tank is returned to the baffle packing type anoxic anaerobic reaction tank, and a part is used as excess sludge.

⑧The water after sedimentation treatment in the secondary sedimentation tank enters the decolorization tank and sand filter tank through the overflow weir, and is discharged after being filtered.

⑨Enhanced air flotation tank, ozone oxidation coagulation sedimentation tank, baffle packing type anoxic anaerobic reaction tank, and the remaining sludge discharged from the secondary sedimentation tank is dehydrated and transported abroad.

The beneficial effects of the present invention are: the present invention has simple structure, low cost, relatively good depth effect on the treatment of refined cotton wastewater, and convenient management.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic structural view of an enhanced air flotation tank according to an embodiment of the present invention.

In Figure 1: 1. Strengthened air flotation tank, 1-1. Strengthened air flotation tank inlet pipe, 1-2. Mud and sand area, 1-3. Mixing area, 1-4. Water collection area, 1-5. Slag collection area, 1-6. Enhanced air flotation tank aeration disc, 1-7. Strengthened air flotation tank water distribution branch pipe, 1-8. Blower and gas flow meter, 1-9. Strengthened air flotation tank three-phase separator, 1-10. Overflow weir , 1-11. Scraper plate, 1-12. Scum tank, 1-13. Sediment discharge valve.

Fig. 2 is a schematic structural view of an ozone oxidation coagulation sedimentation tank according to an embodiment of the present invention.

In Figure 2: 2. Ozone oxidation coagulation sedimentation tank, 2-1. Aeration mixing zone, 2-2. Sedimentation zone, 2-3. Ozone aeration pan, 2-4. Water distribution branch pipe, 2-5. Water inlet pipe, 2-6. Ozone blower and gas flow meter, 2-7. Ozone generator, 2-8. Baffle, 2-9. Ozone oxidation coagulation sedimentation tank three-phase separator, 2-10. Ozone oxidation Coagulation sedimentation tank overflow weir, 2-11. Mud discharge valve, 2-12. Chemical addition system.

Fig. 3 is a schematic structural view of a baffle packing type anoxic anaerobic reaction tank according to an embodiment of the present invention.

In Fig. 3: 3. baffle packing type anoxic anaerobic reaction tank, 3-1. baffle plate, 3-2. concurrent oxygen section, 3-3. anoxic section, 3-4. anaerobic section, 3 -5. Inlet pipe of baffle packing type anoxic anaerobic reaction tank, 3-6. Three-phase separator of baffle packing type anoxic anaerobic reaction tank, 3-7. Overflow water of baffle packing type anoxic anaerobic reaction tank Weir, 3-8. sludge discharge valve, 3-9. upper cover, 3-10. air collecting pipe, 3-11. packing.

Fig. 4 is a schematic structural diagram of an aerobic contact oxidation tank according to an embodiment of the present invention.

In Figure 4: 4. Aerobic contact oxidation tank, 4-1. Aerobic contact oxidation tank inlet pipe, 4-2. Water distribution triangle cone, 4-3. Aeration control system, 4-4. Filler, 4- 5. Aerobic contact oxidation tank overflow weir.

Fig. 5 is a process flow diagram of an embodiment of the present invention.

Detailed ways

The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

Example

As shown in Figures 1 to 5, a refined cotton wastewater treatment system of the present invention includes a wastewater regulating tank, an enhanced air flotation tank 1, an ozone oxidation coagulation sedimentation tank 2, a baffle packing type anoxic anaerobic reaction tank 3, and Oxygen contact oxidation tank 4, secondary settling tank, decolorization tank and sand filter tank; the wastewater conditioning tank, enhanced air flotation tank 1, ozone oxidation coagulation sedimentation tank 2, baffle packing type anoxic anaerobic reaction tank 3, aerobic The contact oxidation tank 4, the secondary sedimentation tank, the decolorization tank and the sand filter tank are connected in sequence.

The wastewater regulating tank includes a water inlet pipe and a water outlet pipe for regulating the water quality and quantity of the refined cotton wastewater.

The enhanced air flotation tank 1 includes a water inlet pipe 1-1 and an outlet pipe for discharging treated water, and the enhanced air flotation tank is sequentially composed of a mud sand area 1-2, a mixing area 1-3 and a separation area from bottom to top; The separation zone includes a water collection area 1-4 and a slag collection area 1-5 located in the water collection area; an aeration tray is arranged between the mud sand area 1-2 and the mixing area 1-3 of the enhanced air flotation tank 1-6, the top of the aeration pan is provided with a water distribution branch pipe 1-7, the water distribution branch pipe is connected to the water inlet pipe 1-1, and the aeration pan 1-6 is connected to a reinforced Fan 1-8 outside the air flotation pool. A three-phase separator 1-9 is provided in the separation zone, and the three-phase separator 1-9 includes a deflector and a triangular deflector ring located below the deflector and used in conjunction with the deflector. The triangular deflector ring is installed on the inner wall of the enhanced air flotation pool. The upper part of the deflector is in the same shape as the separation area, the lower part of the deflector is trumpet-shaped, and the inner diameter of the lower part of the deflector is greater than the inner diameter of the triangular diversion ring; the upper part of the outer wall of the separation zone is provided with an overflow weir 1-10, and the overflow weir 1-10 is connected to the outlet pipe; the slag collecting area 1-5 is equipped with scraping Plate 1-11 and scum tank 1-12; when the waste water overflows from bottom to top, water and scum enter the lower part of the deflector through the triangular diversion ring together, and the scum continues to enter the scum collecting area 1-5 upwards, Water enters the catchment area 1-4 through the gap between the deflector plate and the triangular deflector ring; for better wastewater treatment, the water distribution branch pipes 1-7 are arranged in the shape of concentric circles or crosses, and the water distribution There is a horizontal radiation outlet on the branch pipe; further, the aeration pan is a microporous aeration pan with micropores evenly arranged; due to the different densities of water and sediment, separation is realized under the action of a three-phase separator; in order to The treated sediment is discharged, and the bottom of the enhanced air flotation tank is provided with a sediment discharge valve 1-13.

The water outlet pipe of the enhanced air flotation tank 1 communicates with the water inlet pipe 2-5 of the ozone oxidation coagulation sedimentation tank 2.

The ozone oxidation coagulation sedimentation tank 2 includes an aeration mixing zone 2-1 and a sedimentation zone 2-2, the bottom of the aeration mixing zone is provided with an ozone aeration pan 2-3, and the top of the ozone aeration pan is provided with There is a water distribution branch pipe 2-4, the water distribution branch pipe 2-4 is connected to the water inlet pipe 2-5, and the ozone aeration pan 2-3 is connected to a fan outside the ozone oxidation coagulation sedimentation tank through the aeration pipe, The fan is connected to the ozone generator 2-7 through the pipeline; the baffle plate 2-8 is provided in the described settling area, and the inwall of the baffle plate and the settling tank forms a waste water channel as the waste water enters the settling area, and the outlet of the settling area is provided with three Phase separator 2-9, overflow weir 2-10 is provided on the upper part of the outlet of the sedimentation area, the bottom of the sedimentation area is designed as a conical structure, and a mud discharge valve 2-11 is arranged at the bottom of the sedimentation area. In the aeration mixing area The upper part is provided with a liquid medicine adding system 2-12.

The baffle packing type anoxic anaerobic reaction tank 3 comprises a part-aerobic section 3-2, an anoxic section 3-3 and anaerobic section 3-4 separated by a baffle plate 3-1, and the part-aerobic section The head end of 3-2 is provided with an inlet pipe 3-5 for feeding waste water, the end of the anoxic section 3-2 is connected to the head end of the anoxic section 3-3, and the end of the anoxic section 3-3 is connected to the anaerobic section 3-4 The head end is connected, and the lower part of the baffle on the inlet side of the anoxic section 3-3 and the anaerobic section 3-4 is provided with a 45-degree corner to avoid the impact of the water flow when it enters, thereby buffering the water flow and uniform water distribution; the end of the anaerobic section 3-4 is provided with a three-phase separator 3-6 and an overflow weir 3-7, and the overflow weir 3-7 is connected to the outlet pipe; the anaerobic section 3-2, anoxic section The bottom of 3-3 and anaerobic section 3-4 is designed as a conical structure, and the conical structure is connected to the sludge discharge valve 3-8; the facultative section, anoxic section and The upper cover 3-9 of the anaerobic section is designed as a conical structure, and the top of the conical structure is provided with an independent methane waste gas collection pipe 3-10; the aerobic section, the anoxic section and the anaerobic section are all provided with fillers 3-11.

The middle and lower part of the aerobic contact oxidation tank 4 is provided with a water inlet pipe 4-1, and the lower part of the water inlet pipe 4-1 is provided with a water distribution triangle cone 4-2; the lower part of the water distribution triangle cone 4-2 is provided with an exposure Gas control system 4-3, the aeration control system 4-3 includes an aeration pan, a blower and a dissolved oxygen measurement and control device; further, the aeration pan is a microporous aeration pan with micropores evenly arranged . The aeration pan is connected to a blower through an aeration pipe, and the blower is arranged outside the aerobic contact oxidation tank, and a dissolved oxygen measurement and control device is installed on the upper part of the aerobic contact oxidation tank and under the wastewater surface, and the dissolved oxygen measurement and control device is based on the oxygen capacity. The blower is regulated and operated; the aerobic contact oxidation tank is built with filler 4-4; the outlet of the aerobic contact oxidation tank is provided with an overflow weir 4-5.

The outlet pipe of the aerobic contact oxidation tank 4 is connected to the secondary sedimentation tank, the bottom of the secondary sedimentation tank is provided with a sludge return system, a part of the sludge is returned to the baffle packing type anoxic anaerobic reaction tank 3, and a part is the remaining sludge .

The water after sedimentation treatment in the secondary sedimentation tank enters the decolorization tank and sand filter tank through the overflow weir, and is discharged after being filtered.

A kind of method that adopts above-mentioned refined cotton waste water treatment system to carry out waste water treatment, has following steps:

① Refined cotton waste water enters the waste water regulating tank through the water inlet pipe to adjust the water quality and water quantity.

② Then the waste water enters the middle and lower part of the separation zone of the enhanced air flotation tank through the water inlet pipe 1-1; the aeration disc 1-6 located under the water inlet pipe of the enhanced air flotation tank produces a large number of fine air bubbles to cause friction of the solids in the waste water and remove the solids on the surface Other pollutants; the fine air bubbles produced by the aeration disc 1-6 adhere to the floating matter to form a mixture that rises under the action of buoyancy, and under the action of the three-phase separator 1-9 in the enhanced air flotation tank, the mixture rises to the slag collection Area 1-5, under the action of scraper plate 1-11, the scum enters the scum tank 1-12 and is cleaned and transported; the sediment sinks to the mud sand area 1- at the lower part of the enhanced air flotation tank under the action of gravity 2. Discharge through the sediment discharge valve 1-13 at the bottom of the enhanced air flotation tank; the separated treated water enters the water collection area 1-4 of the enhanced air flotation tank under the action of the deflector in the three-phase separation area of the enhanced air flotation tank, and passes through the overflow weir 1 -10. The outlet pipe and the connecting pipe are connected to the water inlet pipe 2-5 of the ozone oxidation coagulation sedimentation tank.

③Wastewater enters the middle and lower part of the ozone oxidation coagulation sedimentation tank 2 through the inlet pipe 2-5 of the ozone oxidation coagulation sedimentation tank and the water distribution branch pipe 2-4; the ozone aeration plate 2 located below the water distribution branch pipe of the ozone oxidation coagulation sedimentation tank -3 A large number of fine bubbles are generated to further rub the solids in the wastewater, and at the same time oxidize the macromolecular substances in the wastewater into small molecular substances that are easy to absorb and absorb. The three-phase separator 2-9 in the zone realizes the separation of mud and water; the sludge sinks to the lower part of the sedimentation zone 2-2 of the ozone oxidation coagulation sedimentation tank under the action of gravity, and is discharged through the sludge discharge valve 2-11 at the bottom; the waste water passes through The overflow weir 2-10, the outlet pipe and the connecting pipe are connected to the water inlet pipe 3-5 of the baffle packing type anoxic anaerobic reaction tank.

④Wastewater enters the lower part of the baffle packing anoxic anaerobic reaction tank 3 through the inlet pipe 3-5 of the aerobic section of the baffle packing anoxic anaerobic reaction tank; after the waste water enters the baffle packing anoxic anaerobic reaction tank Go up and down along the baffle, and pass through the sludge bed of each reaction chamber in the facultative section 3-2, anoxic section 3-3 and anaerobic section 3-4 in turn, and the sludge in the reaction pool will be discharged along with the wastewater up and down. The movement of the flow and the rise of biogas, the blocking effect of the baffle and the sedimentation of the sludge itself reduce the flow rate of the sludge, so a large amount of sludge is trapped in the reaction tank, and the microorganisms and wastewater in the reaction tank Fully contact with the organic matter in it. The facultative bacteria in the facultative stage 3-2, the heterotrophic bacteria in the anoxic stage 3-3 and the anaerobic stage 3-4 hydrolyze the organic matter in the wastewater into organic acids, and decompose the macromolecular organic matter into small molecular organic matter. Organic matter is converted into soluble organic matter.

⑤ After the anaerobic reaction, the three-phase separator 3-6 provided at the end of the anaerobic section 3-4 realizes the separation of mud, water and methane gas. In the lower part of the aerobic anaerobic reaction tank, the excess sludge is discharged through the sludge discharge valve 3-8 at the bottom; the methane waste gas generated by the baffle packing type anoxic anaerobic reaction tank is collected and discharged through the gas collecting pipe 3-10 at the top of the reaction tank; The waste water is connected to the water inlet pipe 4-1 of the aerobic contact oxidation tank through the overflow weir, the outlet pipe and the connecting pipe.

⑥Waste water enters the middle and lower part of the aerobic contact oxidation tank 4 through the water inlet pipe 4-1, and the water is evenly distributed under the action of the water distribution triangle 4-2. The measuring and controlling device regulates the operation of the blower according to the oxygen capacity to ensure that the dissolved oxygen in the aerobic contact oxidation pool water is greater than 2 mg/L, and the treated waste water flows out through the overflow weir 4-5 and the outlet pipe.

⑦ The outlet pipe of the aerobic contact oxidation tank is connected to the water distribution pipe of the secondary settling tank, and part of the settled sludge in the secondary settling tank flows back into the baffle packing type anoxic anaerobic reaction tank 3, and part of it is used as excess sludge.

⑧The water after sedimentation treatment in the secondary sedimentation tank enters the decolorization tank and sand filter tank through the overflow weir, and is discharged after being filtered.

⑨Enhanced air flotation tank 1, ozone oxidation coagulation sedimentation tank 2, baffle packing type anoxic anaerobic reaction tank 3, and the remaining sludge discharged from the secondary sedimentation tank is dehydrated and transported abroad.

Inspired by the above-mentioned ideal embodiment according to the present invention, through the above-mentioned description content, relevant workers can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, but must be determined according to the scope of the claims.

Claims (1)

1. a purified cotton Waste Water Treatment, is characterized in that: comprise wastewater equalization pond, strengthening air flotation pool (1), ozone oxidation coagulative precipitation tank (2), baffling filler formula anoxic anaerobic reation pool (3), aerobic contact oxidation pond (4), second pond, decolouring pond and sand filter;

Described equalizing tank comprises water inlet pipe and rising pipe, for regulating water quality and the water yield of purified cotton waste water;

Described strengthening air flotation pool (1) comprises water inlet pipe (1-1) and the rising pipe for discharging the rear water of process, and described strengthening air flotation pool is followed successively by silt particle district (1-2), mixing zone (1-3) and disengaging zone from bottom to up; Described disengaging zone comprises catchment area (1-4) and is positioned at Nei Jizha district, catchment area (1-5); Aeration plate (1-6) is provided with between the silt particle district (1-2) of described strengthening air flotation pool and mixing zone (1-3), the top of described aeration plate is provided with water distribution branch pipe (1-7), described water distribution branch pipe connects water inlet pipe (1-1), and described aeration plate (1-6) is connected with the blower fan outside strengthening air flotation pool by aeration tube; Triphase separator (1-9) is provided with in described disengaging zone, described triphase separator (1-9) comprise flow deflector and be positioned at below flow deflector with flow deflector with the use of triangle guide ring, described triangle guide ring is arranged on the inwall of strengthening air flotation pool, the top of described flow deflector is identical with the shape of disengaging zone, the bottom of described flow deflector is horn-like, and the internal diameter of the bottom of described flow deflector is greater than the internal diameter of triangle guide ring; The top of described disengaging zone outer wall is provided with overfalling weir (1-10), and described overfalling weir (1-10) is connected with rising pipe; Described Ji Zhaqu (1-5) is laid with dreg scraper (1-11) and scum silica frost groove (1-12); When waste water overflows from the bottom up, water enters the bottom of flow deflector together with scum silica frost by triangle guide ring, and scum silica frost continues up to enter Ji Zhaqu (1-5), and water enters catchment area (1-4) by the gap between flow deflector and triangle guide ring; In order to the better effects if of wastewater treatment, described water distribution branch pipe (1-7) is arranged to concentric circles or cross shape, water distribution branch pipe has horizontal radiation water outlet; Further, described aeration plate is the pore type aeration plate being evenly provided with micropore; Due to water, sedimentary density difference, realize being separated under triphase separator effect; In order to discharge the throw out after process, bottom described strengthening air flotation pool, be provided with sediment discharge valve (1-13);

Described ozone oxidation coagulative precipitation tank (2) comprises aeration mixing zone (2-1) and settling region (2-2), ozonation aerated dish (2-3) is provided with bottom aeration mixing zone, the top of described ozonation aerated dish is provided with water distribution branch pipe (2-4), described water distribution branch pipe (2-4) connects water inlet pipe (2-5), described ozonation aerated dish (2-3) is connected with the blower fan outside ozone oxidation coagulative precipitation tank by aeration tube, blower and pipeline is communicated with ozonizer (2-7); Baffle plate (2-8) is provided with in described settling region, the inwall of this baffle plate and settling tank forms the waste water runner entering settling region as waste water, the exit of settling region is provided with triphase separator (2-9), the outlet top of settling region is provided with overfalling weir (2-10), the tapered structure of settling region bottom design, bottom settling region, be provided with mud valve (2-11), described middle and upper part, aeration mixing zone is provided with liquid add-on system (2-12);

Described baffling filler formula anoxic anaerobic reation pool (3) comprise be separated into by traverse baffle (3-1) double oxygen section (3-2), anoxic section (3-3) and anaerobism section (3-4), described double oxygen section (3-2) head end is provided with the water inlet pipe (3-5) for feeding waste water, oxygen section (3-2) end of holding concurrently is communicated with anoxic section (3-3) head end, and anoxic section (3-3) end is communicated with anaerobism section (3-4) head end; The bottom of the water inlet side traverse baffle of described anoxic section (3-3) and anaerobism section (3-4) is provided with the corner of 45 degree, the shock action produced when entering to avoid current, thus the effect playing buffering current and water distribution uniformity; Anaerobism section (3-4) end is provided with triphase separator (3-6) and overfalling weir (3-7), and overfalling weir (3-7) connects rising pipe; Described double oxygen section (3-2), anoxic section (3-3) and the tapered structure of anaerobism section (3-4) bottom design, pyramidal structure connects mud discharging valve (3-8); The upper cover (3-9) of the double oxygen section of described baffling filler formula anoxic anaerobic reation pool, anoxic section and anaerobism section is designed to conical structure, conical structure top is all provided with methane waste product effuser (3-10), is all provided with filler (3-11) in described double oxygen section, anoxic section and anaerobism section;

The interior middle and lower part of described aerobic contact oxidation pond (4) is provided with water inlet pipe (4-1), and described water inlet pipe (4-1) bottom is provided with water distribution pyrometric cone (4-2); Described water distribution pyrometric cone (4-2) bottom is provided with aeration regulator control system (4-3), and described aeration regulator control system (4-3) comprises aeration plate, gas blower and dissolved oxygen sensing regulation device; Further, described aeration plate is the pore type aeration plate being evenly provided with micropore; Described aeration plate connects gas blower by aeration tube, gas blower is arranged on outside aerobic contact oxidation pond, top, the waste water underwater in aerobic contact oxidation pond arrange dissolved oxygen sensing regulation device, and described dissolved oxygen sensing regulation device is according to the work of oxygen capacity regulation and control gas blower; Described aerobic contact oxidation pond is built-in with filler (4-4); The exit in described aerobic contact oxidation pond is laid with overflow weir (4-5);

The rising pipe of described aerobic contact oxidation pond (4) connects second pond, and be provided with sludge recirculation system bottom second pond, a part of sludge reflux is to baffling filler formula anoxic anaerobic reation pool (3);

Water after sedimentation in secondary sedimentation tank process enters decolouring pond and sand filter through overflow weir, qualified discharge after filtering.