CN101569808A - Uninterrupted anti-disturbance flocculent deposit reverse separation system - Google Patents

Abstract

The invention provides an uninterrupted anti-disturbance flocculation sedimentation reverse separation system, the blending device is sequentially connected by a dosing device, a turbulence pipe and a reaction tank; the floc precipitation reverse separation device includes a reverse filtration bin, floc deflector and floc storage bin, the reverse filter plate is set on the top of the floc sedimentation reverse separation device, the floc storage bin is set at the bottom of the floc sedimentation reverse separation device, the floc deflector It is set between the reverse filter bin and the floc storage bin. The system realizes the reverse separation function of floc sedimentation and filtration in the same device, which greatly reduces the load on the filter screen, and the floc enrichment and sedimentation are no longer affected by the disturbance caused by fluid and filtration. The system has the characteristics of small footprint, low energy consumption, closed anti-bacterial pollution, high floc separation efficiency due to reverse flocculation, uninterrupted water flow, low investment, chemical saving and low operating cost.

Description

Uninterrupted anti-disturbance flocculation sedimentation reverse separation system

technical field

The invention relates to the technical field of solid-liquid separation, in particular to an uninterrupted anti-disturbance flocculation sedimentation reverse separation system.

Background technique

At present, the treatment of high-concentration wastewater such as potato, cassava and corn starch and other agricultural product processing wastewater and chemical and chemical wastewater is relatively difficult and is a worldwide problem. The use of conventional biochemical treatment requires large investment, high operating costs, and poor treatment effects. In the prior art, high-concentration sewage is usually treated by flocculation. Flocculation treatment can be divided into two types: static and dynamic. The traditional static flocculation treatment usually needs to build a large-scale sedimentation tank to match it. Its advantage is low energy consumption, and its disadvantages are: ① The mixing of flocculant and sewage Insufficient strength; ②Sedimentation tank has high infrastructure cost and covers a large area; ③Secondary pollution is easy to occur, especially starch and agricultural product processing wastewater are rich in organic nutrients, and it is easy to breed bacteria if they stay in the sedimentation tank for a long time. Produce a large amount of harmful gas, pollute the surrounding environment. The same problem also occurs in the flocculation, precipitation, separation and extraction of natural medicines, organic materials, etc., and in the traditional tap water purification process. The dynamic flocculation method has the advantages of fast flocculation speed and the shearing effect on the flocs to make the flocs dense. However, the existing technology usually adopts open, co-directional or side-to-side sedimentation filtration treatment. This kind of treatment method, the flocs are easy to concentrate On the filter screen, the filtration load is too heavy, and there are disadvantages such as high energy consumption, inconvenient recovery of flocs, slow settling speed caused by water flow disturbance, easy blockage of device pipelines by flocs, and the quality of effluent water is easily affected by environmental changes. For example, the variable direction and variable speed pulsating water flow type flocculation device and flocculation process with application number 200410059901.4, the semi-circulation jet type flocculation device and flocculation process with application number 200410059903.3, and the equipment and technology for extracting protein from potato starch wastewater with application number 200510053212.7, all An external power system or heating device is required, and the energy consumption is high; the twisted flocculation device with application number 92214473.7 and the bucket grid flocculation device with application number 200720035134.2 use open-air sedimentation tanks, and the water quality is easily affected by environmental changes and will cause pollution; The application number is 98237001.6. The water distribution and flocculation device in the transition section of the reaction tank adopts vertical grid arrangement to reduce the kinetic energy of the flowing water, and cannot recover the flocs enriched at the bottom of the tank, which affects the further adsorption and separation of the pollutants in the sewage by the flocs.

Contents of the invention

The purpose of the present invention is to provide an uninterrupted anti-disturbance flocculation sedimentation reverse separation system, which can realize the reverse separation function of floc settlement and filtration in the same device, anti-disturbance of floc enrichment and sedimentation process, and occupy an area of Small size, low energy consumption, closed anti-bacterial pollution, high efficiency of solid-liquid separation, low investment and low operating cost.

For realizing above-mentioned object, the technical scheme that the present invention takes is:

An uninterrupted anti-disturbance flocculation sedimentation reverse separation system, comprising a blending reaction device and a floc sedimentation reverse separation device connected thereto, the blending device is composed of a dosing device, a turbulence pipe and a reaction tank connected; the floc sedimentation reverse separation device includes a reverse filter bin, a floc deflector and a floc storage bin, the reverse filter plate is arranged on the top of the floc sedimentation reverse separation device, and the floc storage The bin is arranged at the bottom of the floc sedimentation reverse separation device, and the floc deflector is arranged between the reverse filter bin and the floc storage bin.

The water inlet of the reaction tank is provided with a swirl taper water outlet tray, the outlet channel of the swirl taper water outlet tray is in a spiral radial shape, and the aperture of the outlet channel gradually becomes smaller from the center to the end.

The floc sedimentation reverse separation device is a water distribution anti-disturbance floc sedimentation reverse separation device, including a water inlet, a water inlet bin, a water distribution area, a floc deflector, a floc storage bin and a reverse filtration bin , the water inlet bin is composed of the device housing, the first vertical baffle in the water distribution area, and the interlaced floc deflectors in the shape of an oblique funnel in their middle and lower parts; the water distribution area is set There are a number of vertical baffles that gradually become shorter and have passages up and down, and a floc deflector is installed on the middle and lower parts of each side of each baffle, and the floc deflectors on each adjacent vertical baffle are staggered to form Inclined funnel-shaped; the floc storage bin is located below the water distribution area, and its bottom is connected to the floc drainage pipe; the reverse filter bin is located at the end of the water distribution area, and its top is provided with a water outlet. It communicates with the water outlet pipeline through a filter net.

The floc sedimentation reverse separation device is an anti-disturbance floc reverse sedimentation separation tank, which includes a floc energy dissipation diversion area, a spiral separation plate, a floc storage bin and a reverse filter bin, and the floc energy dissipation The diversion area includes a diversion pipe connected to the water inlet pipe and a hat-shaped diversion cover arranged on its upper part, the diversion cover opening is downward, and there is a gap between the diversion pipe and its nozzle and the diversion cover; The spiral separation plate is a downward spiral spiral plate surrounding the vertical part of the draft tube. The spiral separation plate and the tank shell form a descending spiral channel; pipeline connection; the reverse filter chamber is arranged on the upper part of the tank body, the top of which is provided with a water outlet, and a filter screen is arranged at the water outlet, and the top of the tank body is communicated with the water outlet pipeline.

The uninterrupted anti-disturbance flocculation-sedimentation reverse separation system includes one or more stages of fine filter devices, which are connected with the reverse filter chamber of the floc sedimentation reverse separation device.

The uninterrupted anti-disturbance flocculation-sedimentation reverse separation system includes a backwashing device.

The uninterrupted anti-disturbance flocculation-sedimentation reverse separation system includes a floc recovery and drying device.

The uninterrupted anti-disturbance flocculation sedimentation reverse separation system provided by the present invention realizes the reverse separation function of floc settlement and filtration in the same device, greatly reduces the load on the filter screen, and the floc enrichment and settlement are no longer affected by the fluid and filter-induced perturbations. The system is matched with fine filtration and small molecule adsorption and separation devices. The treated clean water can be discharged up to the standard or reused in production. The separated flocs can be directly squeezed and dehydrated or spray-dried for resource utilization, especially for potatoes, After cassava and corn starch processing wastewater is treated, it can generally meet the farmland irrigation standard and be directly used for irrigation. The separated protein and organic matter can be recycled as resources to increase economic benefits. The system has the characteristics of small footprint, low energy consumption, closed anti-bacterial pollution, high floc separation efficiency due to reverse flocculation, uninterrupted water flow, low investment, chemical saving and low operating cost. It is of great significance to promote the coagulation and flocculation treatment of high-concentration sewage, reduce the cost of sewage treatment and recycle floc resources.

Description of drawings

Fig. 1 is the schematic diagram of the first embodiment of the present invention;

Fig. 2 is a top view of the swirl water inlet tray of the present invention;

Fig. 3 is the schematic diagram of reverse filter chamber of the present invention;

Fig. 4 is a schematic diagram of a second embodiment of the present invention.

In the figure: 1-sewage pool, 2-sewage pump, 3-combined chemical dosing box, 4-turbulent flow pipe, 5-swirling tapered water outlet tray, 6-reaction tank, 7-pressure gauge 1, 8-water inlet , 9-Water inlet chamber, 10-Liquid outlet, 11-Horizontal baffle, 12-Vertical baffle, 13-Pressure gauge 2, 14-Water distribution area, 15-Reverse filter chamber, 16-Floc diversion Plate, 16'-floc deflector, 17-observation window, 18-floc storage bin, 19-floc storage bin, 20-flocculation pipeline valve 1, 21-filter, 22-scraper, 23 -Liquid outlet valve, 24-Drainage pipeline valve, 25-Fine filter tank, 26-Flocculation pipeline valve 2, 27-Flocculation pipeline, 28-Backwash valve, 29-Fine filtration valve, 30-Small molecule adsorption separation Tank, 31-Water outlet valve, 32-Clean water tank, 33-Clear water pump, 34-Water inlet valve, 35-Pressure gauge 3, 36-Drive shaft, 37-Porous bottom plate, 38-Rotary knob, 39-Bolt quick buckle Parts, 40-shroud, 41-diffuser.

Detailed ways

What is shown in Fig. 1 to Fig. 3 is the first embodiment of the present invention. An uninterrupted anti-disturbance flocculation sedimentation reverse separation system comprises a blending reaction device and a floc sedimentation reverse separation device connected thereto.

The mixing reaction device includes a combination dosing box 3 , a turbulent flow pipe 4 and a reaction tank 6 . The sewage in the sewage pipe of the factory or the sewage pool 1 is pumped out through the sewage pump 2, and enters the pipeline connected with the combination dosing box 3. The combined chemical dosing box 3 is equipped with a chemical quantitative control device, through the feedback of sewage concentration and flow sensors, according to the pre-designed formula, the dosing amount is controlled, and different coagulant chemicals are quantitatively added to the pipeline. Coagulation agents mainly include: flocculants, flocculation aids, pH regulators and fungicides, etc., and different agents and dosages are used according to different sewage treatment. The sewage added with coagulation agent enters the turbulent flow pipe 4 through the pipeline. The turbulent flow pipe 4 is 2 to 5 horizontal "S"-shaped serpentine pipes made of metal or plastic. The inner wall of the turbulent flow pipe 4 is smooth and has no right angles. Curved, corrosion-resistant, compressive strength 0.4 ~ 1Mpa, turbulence pipe 4 can quickly mix sewage and coagulant to form a floc state, the sewage and coagulant through the serpentine turbulence pipe 4 gradually pass through the swirling flow The retracted water tray 5 enters the reaction tank 6 . The cyclone reaction tank 6 is an upright columnar tank. The ratio of the diameter to the height of the bottom surface of the tank is 1:1.5-3, the water inlet pipe enters from the middle of the top of the tank, the swirl taper water outlet tray 5 is set at the water inlet of the reaction tank 6, and the swirl taper taper water outlet tray 5 is the outlet It is in a spiral radial shape, and the aperture of the water outlet gradually becomes smaller from the center to the end. The swirling tapered water outlet tray 5 can speed up the flow rate, so that the liquid maintains a certain impact force and swirling flow state when it enters the reaction tank 6, strengthens the effect of swirling turbulent flow, and forms a plane with the swirling tapered water outlet tray 5 as the plane. The circular sprinkling surface ensures the full mixing of chemicals and sewage. The serpentine turbulence pipe 4 and the swirl reaction tank 6 are designed according to the principle of fluid mechanics to ensure that the sewage and the medicament are fully mixed and have sufficient reaction time. The bottom of the reaction tank 6 is funnel-shaped and connected to the water outlet pipe, and the water outlet pipe is provided with a water inlet valve 34 . The pressure gauge-7 is arranged on the reaction tank 6, and the pressure in the reaction tank 6 can be tested to ensure the sufficient mixing of the medicament and the sewage.

The floc precipitation reverse separation device is a water distribution anti-disturbance floc precipitation reverse separation device, and its shape is a horizontal horizontal tank, including a water inlet 8, a water inlet chamber 9, a water distribution area 14, a floc guide Flow plate 16, floc storage bin 19 and reverse filter bin 15. The water inlet 8 is in the shape of a gradually widening trumpet, and its small mouth end is connected to the water inlet pipe, and the large mouth end extends into the water inlet chamber 9. The ratio of its minimum diameter to the maximum diameter is 1:1.5-4, and the water inlet 8 can effectively reduce the flow of liquid. The flow velocity and kinetic energy can reduce the disturbance of the liquid in the water inlet chamber 9, and help the flocs to "grow up" and settle. The water inlet chamber 9 is composed of the shell of the water distribution anti-disturbance floc sedimentation reverse separation device, the first vertical baffle 12 in the water distribution area 14, and the floc deflectors 16 interlaced in their middle and lower parts in an inclined funnel shape. The composed chamber body is provided with a horizontal baffle 11 on the upper part of the water inlet chamber 9, the horizontal baffle 11 is connected with the first vertical baffle 12 of the water distribution area 14, and is connected with the shell of the water distribution anti-disturbance floc sedimentation reverse separation device There is a gap between the bodies, the horizontal baffle 11 can prevent the large flocs from spreading to the upper channel of the water distribution area 14, and the staggered floc deflectors 16 in the shape of an oblique funnel can guide the flocs to roll down and sink to the lower floc storage Bin 19. The water distribution area 14 is provided with a plurality of gradually shortened vertical baffles 12 with passages up and down, and a floc deflector 16 is respectively installed on the middle and lower parts of each vertical baffle 12 sides, and each adjacent vertical baffle The floc deflectors 16 on the 12 are staggered and oblique funnel-shaped. The upper ends of all vertical baffles 12 are arranged in parallel on a horizontal plane, and the spacing between the upper ends of each vertical baffle 12 and the top of the water distribution anti-disturbance floc sedimentation reverse separation device is equal, and the ratio of this spacing to the length of the vertical baffles 12 is 1: 2-50; the ratio of the distance between the lower end of each vertical baffle 12 and the bottom of the water distribution anti-disturbance floc sedimentation reverse separation device and the length of the vertical baffle 12 is 1:2-50. The upper part of the vertical baffle 12 forms a channel in the horizontal direction, and the liquid can flow forward; the lower end of the vertical baffle 12 and the bottom of the shell of the water distribution anti-disturbance floc sedimentation reverse separation device form a descending channel, which guides the flocs to sink to the flocs. Body storage bin 19. The liquid flows in the horizontal direction in the upper channel of the vertical baffle 12, and the tiny flocs continue to accumulate and "grow up" and descend. Guided by the staggered oblique funnel-shaped floc deflectors 16 and the downward inclined channel, the flocs continue to roll. The floc storage bin 19 is located at the bottom of the water distribution anti-disturbance floc sedimentation reverse separation device, and its bottom is funnel-shaped and connected with the flocculation pipeline 27. The floc storage bin 19 can prevent the flow of the upper liquid from disturbing the settlement of the lower flocs. The flocs enter the floc storage bin through the port 18 of the floc storage bin. An observation window 17 is provided above the floc storage bin 19 and below the water distribution area 14 to observe the settlement and accumulation of the flocs. According to the volume of the flocs, the valve 20 of the floc drainage pipeline is intermittently opened to pass the flocs through. The flocculation pipeline 27 is released. The reverse filter chamber 15 is located at the end of the water distribution area 14, and the top liquid outlet 10 is provided with a filter screen 21 of more than 300 meshes. The filter screen 21 is fixed below a porous bottom plate 37. The number of holes on the porous bottom plate 37 And size can be set according to the material of porous bottom plate 37, thickness, maximum liquid flow and the situation that support filter screen does not rupture. The filter screen 21 and the perforated bottom plate 37 are fixed in the middle by a flange, and the flange is fixed by a plurality of bolt quick fasteners 39 . The material of filter screen 21 is metal, ceramic plate, cotton fiber, chemical fiber etc. When the material of the filter screen 21 is relatively hard, such as a metal or ceramic plate, the porous bottom plate 37 may not be provided. A rotatable scraper 22 is arranged below the filter screen 21, and a transmission shaft 36 is arranged vertically in the center of the scraper 22. The upper end of the transmission shaft 36 is connected with the rotary knob 38 arranged outside the reverse filter chamber 15, and the scraper is driven by rotating the rotary knob 38. 22 turns. The scraper 22 is close to the filter screen 15 above, and the scraper 22 is made of a certain strength and elastic duroplastic or plastic and metal composite or inlaid material. There are still fine flocs in the liquid passing through the water distribution area 14, and they slowly flow to the liquid outlet 10 on the top of the reverse filter chamber 15 with the water flow, and the filter screen 21 blocks the fine flocs under the net, and the flocs gradually accumulate to form a certain thickness and density of the underhanging reverse self-filtering layer. The self-filtering part of the floc will continue to increase the volume of the floc through physical adsorption and chemical reaction. As the flocs further increase, the floc sludge that absorbs more pollutants will be separated from the filter screen 21 naturally due to the weight or rotated by the scraper 22, and will fall and settle by gravity and guide and gather along the inclined bottom plate to the floc storage. Bin 19. At the same time, the newly entered fine flocs continue to rise to supplement the downwardly suspended reverse filter layer, so that the thickness and density of the downwardly suspended filter layer always reach a dynamic balance. The maintenance of this dynamic balance must be regulated by the pressure difference between the filter screen 21 up and down. The pressure difference adjustment range is between 0.01 and 0.5 MPa, and the pressure difference can be calculated from the data displayed by the pressure gauge 2 13 and the pressure gauge 3 35 . The clear water after separation and filtration enters the inner cavity of the top cover, and then enters the ultrafiltration device through the liquid outlet valve 23, the liquid discharge pipeline valve 24 and the pipeline, and the backwash valve 28 is closed at this time.

The ultrafiltration device includes a fine filter tank 25 and a small molecule adsorption separation tank 30 . The bottom of the fine filter tank 25 is funnel-shaped, and is connected with the flocculation pipeline 27 through the flocculation pipeline valve 2 26 . The top of the fine filter tank 25 is connected with the small molecule adsorption and separation tank 30 through a fine filter valve 29 . The separated clean water passes into the clean water tank 32 through the water outlet valve.

The uninterrupted anti-disturbance flocculation sedimentation reverse separation system also includes a backwashing device. The backwashing device is composed of a clean water pump, a backwashing valve 28 , a liquid outlet valve 23 , a liquid discharge pipeline valve 24 , a water inlet valve 34 , a first 20 valve for the flocculation pipeline and a second 26 valve for the flocculation pipeline. When backwashing, open the clean water pump 27, backwash valve 28, valve one 20 of the flocculation pipeline and valve two 26 of the flocculation pipeline, close the water inlet valve 34 and the liquid outlet valve 23, and carry out backwashing for 5 to 10 minutes.

The uninterrupted anti-disturbance flocculation sedimentation reverse separation system also includes a floc recovery and drying device. The floc recovery and drying device includes a sedimentation separation tank and a filter press (or spray dryer). The role of the sedimentation separation tank is to further carry out gravity sedimentation and separation of the floc sediment discharged from the separation tank, or directly use a filter press to dehydrate the sediment, and the filter residue can be used for paving filler or other purposes. If the sewage is potato starch processing wastewater, the concentrated and separated flocs can be directly spray-dried and used as protein feed additives, or further purified and used as food additives.

The daily processing 5m of the inventor's own processing Pilot ^- scale water treatment system is as follows in the implementation of processing potato starch processing wastewater protein separation and wastewater up-to-standard discharge:

(1) The structure of the uninterrupted anti-disturbance flocculation sedimentation reverse separation system:

The diameter of the water delivery pipe is Φ16mm, and the material is PPR;

Sewage pump 2 has a lift of 15 meters and a flow rate of 1.5m ³ /h;

Turbulent flow tube 4 has a diameter of Φ16mm, and is composed of three 50cm long "S"-shaped stainless steel serpentine turbulent tubes;

Reactor 6 is 60cm high, 20cm in diameter, and has a volume of 18L;

The shell of the water distribution anti-disturbance floc sedimentation reverse separation device is made of stainless steel, with a length of 70cm, a width of 15cm, a long end of 40cm, a short end of 15cm, and a volume of about 40L. The water distribution area 14 has 5 pieces of stainless steel vertical baffles 12, the upper part is left 2 cm wide to form a water passing area of 30 cm ² ; the lower part is left 2 cm wide to form a water passing area of 30 cm ² . The gradually widening water inlet 8 has a minimum diameter of Φ16mm, a maximum diameter of Φ30mm, and a pipe length of 3cm. The filter screen 21 of the reverse filter storehouse 15 is a 300 order nylon net, and the effective filter surface diameter of the nylon net is 3cm. The hole diameter of the porous bottom plate 37 is 2mm, and the number of effective holes is 51. The material of rotating scraper 22 under the filter screen is PE. The volume of the floc storage bin 15 is about 5L.

The fine filter tank 25 is equipped with two ceramic cylindrical filter tubes with a diameter of 3 cm, a tube height of 20 cm, an effective filter surface of 250 cm ² , and a filter tube pore diameter of 0.2 μm.

The valves used on all pipelines are copper manual valves. The precision of the pressure gauge is 0.001 MPa.

Supporting agents: self-made high-efficiency organic-inorganic composite flocculants, coagulants and pH regulators.

In order to improve the removal rate of chemical oxygen demand (COD) in waste water, a diameter of 5 cm and a height of 20 cm are set behind the fine filter tank and are filled with granular Al ₂ O ₃ small molecule adsorption and separation columns 30 of molecular sieves. For stainless steel.

After the flocs are discharged, pour them into a plastic bucket with a diameter of 50 cm and a height of 100 cm, settle for 24 hours, take out the supernatant, and dry the flocs deposited below directly with a spray dryer.

(2) Test results:

Inlet water: 0.95 tons of potato starch processing wastewater, water turbidity 485, COD 11206mg/L, water output 0.2 tons/hour, time-consuming 285 minutes, pressure difference between the upper and lower filter nets of the reverse filter chamber 0.02 MPa.

Outlet water: water quality turbidity 46, removal rate 91%. The COD value is 587mg/L, and the removal rate reaches about 94%. The water quality of the effluent is basically transparent and has no peculiar smell, and it still has no peculiar smell after being placed for 10 days. It meets the water quality standard for farmland irrigation and can also be reused as raw potato washing water for potato starch factories. After the separated and recovered organic flocs such as protein were spray dried, the dry weight was 3587g, and the protein and polysaccharide contents were 879g and 1671g respectively, and the recovery rates were 91% and 85% respectively.

As shown in Fig. 4 is the second embodiment of the present invention. The second embodiment is basically the same as the first embodiment, the difference is: the floc sedimentation reverse separation device is an anti-disturbance floc sedimentation reverse separation tank, including floc energy dissipation diversion area, floc Deflector 16', floc storage bin 19 and reverse filter bin 15. The floc energy dissipation diversion area includes a diversion pipe 41 connected to the water inlet pipe and a cap-shaped diversion cover 40 arranged on its upper part. The vertical part of the diversion pipe 41 is arranged in the anti-disturbance floc sedimentation reverse separation tank. Bottom, its longitudinal axis coincides with the longitudinal axis of the tank body, the vertical part of the guide pipe 41 is gradually widened and trumpet-shaped, its small mouth end is connected with the water inlet pipe, and the large mouth end stretches in the guide cover 40. The ratio of the minimum diameter to the maximum diameter of the vertical part of the draft tube 41 is 1:2-6, and its length is 1/5-1/15 of the tank height. The cap-shaped shroud 40 of the shroud 41 opens downward, and there is a gap between the shroud 41 and the shroud 40, and the distance between the two is 1/2 to 1 of the diameter of the water outlet of the shroud 41. Between, the diameter of the guide cover 40 is between 2 to 5 times of the diameter of the water outlet of the guide tube 41, and the height of the guide cover 40 is between 2 to 5 times of the diameter of the water outlet of the guide tube 41. The solid-liquid mixture enters the diversion cap-shaped cover 4 from the water inlet pipe through the trumpet-shaped gradually widening diversion pipe 41, and the floc energy dissipation diversion area can quickly reduce the fluid flow rate, reduce the kinetic energy and reduce the Brown of the floc. Movement helps flocs grow and settle. The floc deflector 16' is a downward spiral spiral plate with the vertical part of the draft pipe 41 as the axis, and forms a descending spiral channel with the shell of the anti-disturbance floc sedimentation reverse separation tank. The floc deflector 16' can be a continuous downward-spinning spiral plate, or can be composed of a plurality of sheet-like plates arranged in a spiral shape in a staggered manner. The heavier and denser flocs descend by gravity and roll into the floc storage bin 19 along the floc deflector 16 ′. The floc storage bin 19 is located at the lower part of the anti-disturbance floc sedimentation reverse separation tank, and its bottom is funnel-shaped, and is connected with the flocculation pipeline-20. The reverse filter chamber 15 is arranged on the upper part of the anti-disturbance floc sedimentation reverse separation tank, and the structure of the floc storage chamber 19 and the reverse filter chamber 15 is the same as that in embodiment 1.

The daily processing 5m of the inventor's own processing Pilot ^- scale water treatment system is as follows in the implementation of processing potato starch processing wastewater protein separation and wastewater up-to-standard discharge:

(1) The structure of the uninterrupted anti-disturbance flocculation sedimentation reverse separation system:

The diameter of the water delivery pipe is Φ16mm, and the material is PPR;

Sewage pump 2 has a lift of 15 meters and a flow rate of 3m ³ /h;

Turbulent flow tube 4 has a diameter of Φ16mm, and is composed of three 50cm long "S"-shaped stainless steel serpentine turbulent tubes;

Reactor 6 is 100cm high, 30cm in diameter, and has a volume of 70L;

The shell of the anti-disturbance floc sedimentation reverse separation tank is made of stainless steel. The tank is 140cm high, 50cm in diameter, and has a volume of about 270L. The vertical part of the draft tube 41 is a trumpet-shaped gradually widening tube with a length of 15 cm, a minimum diameter of Φ16 mm, and a maximum diameter of Φ50 mm. The diameter of the hat-shaped shroud 40 is 15 cm, and the height is 10 cm. The distance between the outer diameter of the spiral floc deflector 16' is 48 cm and the inner diameter of the separation tank shell is 2 mm, the inclination angle of the floc deflector 16' is 30 degrees, and the rotation period is 1.5 cycles. The filter screen 21 of the reverse filter storehouse 15 is a 300 order nylon net, and the effective filter surface diameter of the nylon net is 45cm. The hole diameter of the porous bottom plate 37 is 2 mm, and the number of effective holes is 221. The material of the rotating scraper 22 under the filter screen is PE.

The fine filter tank 25 is equipped with two ceramic cylindrical filter tubes with a diameter of 3 cm, a tube height of 20 cm, an effective filter surface of 650 cm ² , and a filter tube pore diameter of 0.2 μm.

The valves used on all pipelines are copper manual valves. The precision of the pressure gauge is 0.001 MPa.

Supporting agents: self-made high-efficiency organic-inorganic composite flocculants, coagulants and pH regulators.

In order to improve the removal rate of chemical oxygen demand (COD) in waste water, a diameter of 10 cm and a height of 30 cm are set behind the fine filter tank and are filled with granular Al _{2 O} molecular sieve small molecule adsorption separation column 30, the column material For stainless steel.

After the flocs are discharged, pour them into a plastic bucket with a diameter of 50 cm and a height of 100 cm, settle for 24 hours, take out the supernatant, and dry the flocs deposited below directly with a spray dryer.

(2) Test results:

Inlet water: 2 tons of potato starch processing wastewater, water turbidity 435, COD 10574mg/L, water output 0.5 tons/hour, time-consuming 240 minutes, pressure difference between the upper and lower filter nets of the reverse filter chamber 0.05 MPa.

Outlet water: water quality turbidity 53, removal rate 88%. The COD value is 655mg/L, and the removal rate reaches about 93%. The water quality of the effluent is basically transparent and has no peculiar smell, and it still has no peculiar smell after being placed for 10 days. It meets the water quality standard for farmland irrigation and can also be reused as raw potato washing water for potato starch factories. After the separated and recovered organic flocs such as protein were spray dried, the dry weight was 7114g, and the protein and polysaccharide contents were 172g and 3455g respectively, and the recovery rates were 90% and 84% respectively.

What has been described above are only specific embodiments of the present invention. It should be pointed out that for those skilled in the art, other equivalent modifications and improvements made under the technical inspiration provided by the present invention should be regarded as the protection scope of the present invention.

Claims (10)

1, a kind of uninterrupted anti-disturbance flocculent deposit reverse separation system is characterized in that: it comprises blending reaction unit and the flco precipitation reverse separation device that is attached thereto, and described blending device is to be linked in sequence by chemicals dosing plant, turbulated tube and retort to form; Described flco precipitation reverse separation device comprises reverse filtration storehouse, flco deflector and flco storage warehouse, the reverse filtration plate is arranged on the top of flco precipitation reverse separation device, the flco storage warehouse is arranged on the bottom of flco precipitation reverse separation device, and the flco deflector is arranged between reverse filtration storehouse and the flco storage warehouse.

2, uninterrupted anti-disturbance flocculent deposit reverse separation system according to claim 1, it is characterized in that: eddy flow convergent water tray is established in described retort water inlet, the water outlet of eddy flow convergent water tray is radial in the shape of a spiral, and water outlet aperture therefrom mind-set end diminishes gradually.

3, uninterrupted anti-disturbance flocculent deposit reverse separation system according to claim 1 and 2, it is characterized in that: described flco precipitation reverse separation device is a water-distribution anti-disturbance floc precipitation reverse separation device, comprise water inlet, water storage, cloth pool, flco deflector, flco storage warehouse and reverse filtration storehouse, described water storage is by device case, first vertical baffle of cloth pool and be positioned at that their middle and lower parts are staggered to be the warehouse that oblique funnelform flco deflector is formed; Described cloth pool is provided with a plurality of vertical baffles that leave passage up and down that shorten gradually, in the middle and lower part of each baffle plate both sides one flco deflector is installed respectively, and the flco deflector on every adjacent vertical baffle interlocks and is oblique funnel-form; Described flco storage warehouse is located at the below in cloth pool, and its bottom is connected with row's wadding pipeline; Described reverse filtration storehouse is located at the end in cloth pool, and its top sets out the mouth of a river, and delivery port is communicated with outlet pipeline by a screen pack.

4, uninterrupted anti-disturbance flocculent deposit reverse separation system according to claim 3 is characterized in that: described water inlet is for gradually wealthy horn-like, and its osculum end links to each other with water inlet pipe, and big opening end stretches to water storage.

5, uninterrupted anti-disturbance flocculent deposit reverse separation system according to claim 3 is characterized in that: described water storage top is provided with a horizontal plate washer, and horizontal plate washer is connected with first vertical baffle of cloth pool, and leaves the gap between device case.

6, uninterrupted anti-disturbance flocculent deposit reverse separation system according to claim 1 and 2, it is characterized in that: described flco precipitation reverse separation device is a disturbance rejection flco reverse precipitation knockout drum, comprise flco energy dissipating water conservancy diversion district, spiral separation plate, flco storage warehouse and reverse filtration storehouse, described flco energy dissipating water conservancy diversion district comprises the mozzle that is connected with water inlet pipe and the cap shape kuppe of portion disposed thereon, Open Side Down for kuppe, leaves the gap between the mozzle and the mouth of pipe thereof and the kuppe; Described spiral separation plate is a downside rotation type electro spiral plate around the mozzle vertical component, and spiral separation plate and tank body shell constitute the helical duct of a decline; Described flco storage warehouse is located at the bottom of tank body, and its bottom is connected with row's wadding pipeline; Described reverse filtration storehouse is located at the top of tank body, and its top sets out the mouth of a river, and the delivery port place is provided with a screen pack, and the tank body top is communicated with outlet pipeline.

7, uninterrupted anti-disturbance flocculent deposit reverse separation system according to claim 6, it is characterized in that: described mozzle vertical component is arranged on the middle and lower part of tank body, its longitudinal axis overlaps with the longitudinal axis of tank body, it is gradually wealthy horn-like that the vertical component of mozzle is, and its osculum end links to each other with water inlet pipe, big opening end stretches in the kuppe.

8, uninterrupted anti-disturbance flocculent deposit reverse separation system according to claim 1 is characterized in that: also comprise one or more levels fine filtering device, be connected with the reverse filtration storehouse of flco precipitation reverse separation device.

9, uninterrupted anti-disturbance flocculent deposit reverse separation system according to claim 1 is characterized in that: also comprise back purge system, be connected with the reverse filtration storehouse of flco precipitation reverse separation device.

10, uninterrupted anti-disturbance flocculent deposit reverse separation system according to claim 1 is characterized in that: also comprise the flco drying device recovery, be connected with the flco storage warehouse of flco precipitation reverse separation device.

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