CN216571680U - Inclined tube sedimentation tank capable of being cleaned online - Google Patents

Inclined tube sedimentation tank capable of being cleaned online Download PDF

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Publication number
CN216571680U
CN216571680U CN202122516399.7U CN202122516399U CN216571680U CN 216571680 U CN216571680 U CN 216571680U CN 202122516399 U CN202122516399 U CN 202122516399U CN 216571680 U CN216571680 U CN 216571680U
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water
inclined tube
electrode plate
pipe
tank
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关春雨
任璐
薛晓飞
蒋红与
高世雄
王志强
曹天宇
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Beijing Enterprises Water China Investment Co Ltd
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Beijing Enterprises Water China Investment Co Ltd
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Abstract

The utility model discloses an inclined tube sedimentation tank capable of being cleaned on line, which comprises a water inlet, a distribution tank, a distribution tracery wall, a sludge collecting hopper, an inclined tube, a cathode electrode plate and an anode electrode plate, wherein the inclined tube is arranged on the bottom of the distribution tank; through set up negative pole plate electrode and positive electrode plate respectively in the pipe chute surface both sides of pipe chute sedimentation tank, when the floc is at pipe chute surface or top deposit, to the circular telegram of negative pole plate electrode and positive electrode plate electrode, through the aquatic oxygen and the hydrogen of electrolytic formation, form the microbubble on the pipe chute surface, the sedimentary floc in the microbubble adhesion pipe chute makes the sedimentary floc float in the surface of water, gets into top water catch bowl discharge system. The utility model forms micro-bubbles on the surface of the inclined tube by electrolyzing water or electrolyte in the electrolyzed water, and the micro-bubbles adhere to flocs deposited in the inclined tube, so that the deposited flocs float on the water surface and enter a top water collecting tank discharge system. The device is suitable for other solid-liquid flow direction situations such as a same-direction flow inclined pipe, a lateral flow inclined pipe and the like; is suitable for other mud discharge forms such as mechanical mud discharge, perforated pipe mud discharge and the like.

Description

Inclined tube sedimentation tank capable of being cleaned online
Technical Field
The utility model relates to the technical field of water treatment equipment, in particular to an inclined tube sedimentation tank which can realize online cleaning by generating micro bubbles on the surface of an inclined tube through in-situ electrolysis.
Background
The sedimentation tank is an important facility for solid-liquid separation in the water purification process, and the inclined tube sedimentation tank and the improved tank thereof are widely applied in order to ensure that the water purification process can effectively remove suspended matters, flocs and colloid substances.
The inclined tube sedimentation tank is based on the shallow tank sedimentation principle, and the sedimentation distance is shortened by increasing the sedimentation area; the growth of flocs is promoted by the re-coagulation in the inclined tube; laminar flow conditions are created through rectification, so that the method has the advantages of high treatment efficiency, large surface load and the like. The inclined pipe is generally arranged at the middle upper part of the sedimentation tank, and mostly adopts a solid-liquid countercurrent mode, namely water enters from the bottom of the inclined pipe and then moves from bottom to top, and flocs in the inclined pipe move from top to bottom, settle to the bottom of the sedimentation tank through the action of gravity and are discharged out of the sedimentation tank. A small amount of flocs with low density and poor settling property generated in the operation process of the sedimentation tank can be adhered to the inner side of the inclined tube and gradually accumulated to the outer side of the water outlet end of the inclined tube, so that the flow cross section is reduced, and the water outlet effect is influenced.
In order to reduce the influence of floc deposition on the system, the sedimentation tank is cleaned by mainly adopting a manual high-pressure water gun at present, namely, the sedimentation tank is stopped to operate, and after the water level in the sedimentation tank is reduced, the inclined pipe assembly is aligned to the high-pressure water gun for washing. Although no special equipment is needed in the method, the method has obvious defects, such as long-time preparation for cleaning, incapability of coping with emergency, low cleaning efficiency, long production stop time caused by low cleaning efficiency, unstable flow state within a certain time after the production is repeated, reduction of system productivity, poor cleaning effect of the lower half part of the inclined pipe, cleaning dead corners, damage to auxiliary equipment caused by water gun flushing, potential personal safety hazards, large influence on cleaning effect caused by human factors and the like.
Besides manual cleaning, various automatic cleaning devices are used for cleaning inclined tubes of the inclined tube sedimentation tank.
Chinese patent No. 202020593716.8 relates to a pipe chute washing unit and magnetic coagulation sedimentation tank, and the scavenging air gets into many elasticity cleaning belts that the pipe chute bottom was arranged during the washing, and gas struts the air vent on elasticity cleaning belt surface back, carries out the gas flushing to the pipe chute to utilize bubble and the floccule collision combination of adhering to in the honeycomb pipe chute, break away from the floccule on the honeycomb pipe chute and float to the surface, and final floccule mud falls through the gas flushing and returns the system front end with the sparge water together and handles. For the above patent, mechanical equipment is required to move the cleaning belt during cleaning, and the strong disturbance of the bubbles will cause the sedimentation tank to take a long time to recover the normal operation state.
For example, the chinese patent with application number 201820347868.2 relates to a composite flow self-cleaning inclined tube or inclined plate sedimentation tank, a plurality of backwashing air pipes are arranged side by side below the inclined tube or inclined plate packing layer, and air outlets are arranged on the backwashing air pipes at intervals. When cleaning the inclined tube or the inclined plate, stopping the system and discharging mud, when the water level drops to the upper edge of the inclined tube or the inclined plate packing layer by 0.3m, forming boiling water flow with bubbles through aeration, and carrying out preliminary gas-water combined cleaning on the inclined tube or the inclined plate packing layer; and then, circulating water flow is formed by closing and opening adjacent backwashing air pipes at intervals, forward and reverse washing is performed alternately, and finally, sludge is discharged out of the system through drainage and standing sludge discharge and then operation is recovered. For the above patent, the fixed gas washing pipeline installed in the tank body affects the hydraulic conditions in the tank, and the long duration of the washing operation leads to the obvious decrease of the total water yield of the system.
For example, the chinese patent with application number 201922089220.7 relates to an online cleaning device for inclined tube filler, which uses the cooperation of a slide block, a screw, a brush and other devices to clean the inclined tube at different plane positions and different depth positions in the inclined tube by the brush set. The above patent has the problems of more mechanical equipment, longer system shutdown time, lower cleaning efficiency and the like.
In order to solve the problems, the inclined tube sedimentation tank capable of being cleaned on line is particularly provided.
SUMMERY OF THE UTILITY MODEL
The accumulation of flocs on the surface of the inclined tube sedimentation tank is an urgent problem to be solved in operation, and the manual cleaning preparation time is long, the cleaning efficiency is low, and cleaning dead angles exist; some mechanical cleaning methods have more equipment, longer system downtime and poor hydraulic conditions.
The utility model provides an inclined tube sedimentation tank capable of being cleaned on line, which can thoroughly remove flocs deposited on the surface of an inclined tube of the inclined tube sedimentation tank under the condition of not stopping water inlet, and is beneficial to improving the water quality purification effect and ensuring the stable operation of a system.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
through setting up negative pole electrode board and positive electrode board respectively in the pipe chute surface both sides of pipe chute sedimentation tank, when the floc is at the pipe chute surface or top deposit, to negative pole electrode board and positive electrode board circular telegram, through the aquatic oxygen and the hydrogen of aquatic formation of electrolysis, form the microbubble on the pipe chute surface, the sedimentary floc in the microbubble adhesion pipe chute makes the sedimentation floc float in the surface of water, gets into top water catch bowl discharge system. The utility model forms micro-bubbles on the surface of the inclined tube by electrolyzing water or electrolyte in the electrolyzed water, and the micro-bubbles adhere to flocs deposited in the inclined tube, so that the deposited flocs float on the water surface and enter a top water collecting tank discharge system.
An inclined tube sedimentation tank capable of being cleaned on line comprises a water inlet 1, a water distribution tank 2, a water distribution tracery wall 3, a mud collecting hopper 4, an inclined tube 5, a cathode electrode plate 15 and an anode electrode plate 17; the top of the distribution pool 2 is provided with a water inlet 1, and the bottom is provided with a water distribution tracery wall 3; the distribution pool 2 is communicated with the sedimentation area through a distribution tracery wall 3, the bottom of the sedimentation area is provided with a mud collecting hopper 4, and the top of the sedimentation area is provided with an inclined pipe 5; a cathode electrode plate 15 and an anode electrode plate 17 are respectively arranged on two sides of an inclined tube wall 16 of the inclined tube 5; the anode cable 13 and the cathode cable 14 are respectively connected with the anode and the cathode of the power supply unit 6, the anode cable 13 is connected with the anode electrode plate 17, and the cathode cable 14 is connected with the cathode electrode plate 15;
furthermore, the inclined pipe 5 is connected with a water collecting tank 7, the water collecting tank 7 is respectively connected with a water outlet valve 8 and an upper mud discharging valve 9, and the water collecting tank 7 is connected with a water outlet 10 through the water outlet valve 8; the water collecting tank 7 is connected with a lower mud discharging waste water port 12 through an upper mud discharging valve 9; the bottom of the mud collecting hopper 4 is connected with a lower mud discharging waste water port 12 through a lower mud discharging valve 11.
Further, the inclined tube 5 is made of conductive high molecular polymer, metal, dopant or mixture of the above materials, and the like.
Further, the anode electrode plate 17 and the cathode electrode plate 15 are made of carbon materials such as graphite, metal oxide coatings or other novel insoluble electrode materials, and the cathode electrode plate can also be made of medium-potential overpotential metals such as iron; the surfaces of the anode electrode plate and the cathode electrode plate are smooth, and floc deposition is not easy to generate.
When cleaning, the water inlet is not required to be stopped, and the floc can be discharged out of the system only by opening and closing the water outlet valve and the sludge discharge valve, and simultaneously, the flow state in the sedimentation tank is kept stable.
Preferably, before bubbles are generated, a small current is firstly conducted and the positive electrode and the negative electrode are alternatively acted, flocs which are positively or negatively charged on the surface of the cathode electrode plate and the surface of the anode electrode plate can be separated from the surfaces and are removed by means of gravity sinking, and after multiple rounds of positive and negative electrode inversion, the current is increased to enable the surfaces of the positive electrode plate and the negative electrode plate to form bubbles which are combined with the flocs and then float.
Preferably, by adjusting the type and combination of the flocculating agents, chlorine microbubbles can be formed on the surface of the cathode electrode plate, and disinfectant such as hypochlorous acid is generated, so that algae attached to the top of the inclined tube or other parts can be inactivated and desorbed and can be discharged out of the system along with the online cleaning water flow.
Preferably, the surface of the cathode electrode plate or the surface of the anode electrode plate can adsorb pollutants, and the adsorbed pollutants can be removed by degrading and separating part of the pollutants enriched on the surface of the electrode material by utilizing an oxidation or reduction mechanism through subsequent electrified electrolysis.
Preferably, during on-line cleaning, flotation of the floc and bubble combination is promoted by vibrating the chute or the like.
Compared with the prior art, the utility model controls the current intensity to be 0.1mA/cm by switching the cathode and the anode2~100mA/cm2. When the current intensity is small, the alternate attraction or repulsion among the charged flocs can be realized, and the separation of the flocs is facilitated; when the current intensity is higher, the electrolysis of water or electrolyte can be realized, hydrogen is generated by the cathode electrode plate of the inclined tube during the electrolysis of water, the size of hydrogen bubbles is 1 nm-100 mu m, and floc deposited on the surface of the inclined tube can be driven to float upwards after the generation.
The reaction formula is shown as follows:
anode: h2O→2H++1/2O2(g)+2e-
Cathode: 2H2O+2e-→2OH-+H2(g)
Adding specific salt into water to form microbubbles containing specific components, wherein the chlorine-containing microbubbles and reaction products thereof have the effect of killing algae attached to the surface of the inclined tube; pollutants are adsorbed on the surface of the electrode material, and part of the pollutants adsorbed on the surface of the electrode material can be degraded through an oxidation or reduction mechanism through electrolysis; in order to optimize the online cleaning effect, the floc and bubble combination can be promoted to float upwards by adopting a vibration inclined tube and other modes; the description about the inclined tube sedimentation tank is also applicable to an inclined plate sedimentation tank or a tank type based on the reinforced sedimentation principle, wherein the distance between the inscribed circles of the inclined tubes is 10-100 mm; the distance between the inclined plate and the horizontal plate is 10-100 mm; the device is suitable for other solid-liquid flow direction situations such as cocurrent flow inclined pipes, lateral flow inclined pipes and the like; the device is suitable for mechanical sludge discharge, perforated pipe sludge discharge and other sludge discharge forms. The inclined tube sedimentation tank is suitable for scenes such as pretreatment and advanced treatment of purified water, sewage, reclaimed water and seawater in the fields of municipal administration, industry, agriculture and the like.
Drawings
Fig. 1 is a schematic diagram of a normal operation state (normal operation state) of an inclined tube sedimentation tank capable of being cleaned on line.
Fig. 2 is a schematic diagram of an online cleaning state (online cleaning state) of an inclined tube sedimentation tank capable of being cleaned online.
In the figure, 1, a water inlet; 2. a water distribution tank; 3. a water distribution tracery wall; 4. a mud collection hopper; 5. an inclined tube; 6. a power supply unit; 7. a water collection tank; 8. a water outlet valve; 9. an upper mud discharging valve; 10. a water outlet; 11. a lower mud discharge valve; 12. a lower sludge discharge waste water port; 13. an anode cable; 14. a cathode cable; 15. a cathode electrode plate; 16. a sloped tube wall; 17. an anode electrode plate; 18. and discharging the sludge wastewater.
Detailed Description
The application and implementation of the device according to the utility model will be further described with reference to the drawings, but the scope of protection of the utility model is not limited thereto.
As shown in figure 1, in a normal operation mode, raw water is added with a flocculating agent and a coagulant aid for coagulation, then enters a distribution tank 2 from a water inlet 1 and enters a sedimentation area through a distribution tracery wall 3, and flocs formed by part of colloids and particles in the water directly sink into a sludge collection hopper 4 in the sedimentation area or precipitate in an inclined tube 5 and then slide to the sludge collection hopper 4 at the bottom of the sedimentation area. The purified water flows upwards through the inclined pipe 5 and is collected by the water collecting tank 7, the water outlet 10 enters the next unit, the water outlet valve 8 is fully opened at the moment, and the upper mud discharging valve 9 is fully closed; and (3) periodically opening the lower mud discharge valve 11, and discharging the collected lower mud discharge waste water port 12 in the mud collection hopper 4 to the outside of the system. When the flocs are accumulated to a certain degree on the surface of the cathode electrode plate 15, the surface of the anode electrode plate 17 or the top of the inclined tube 5 on the inclined tube wall 16 inside the inclined tube 5, the online cleaning mode is started, and the water outlet valve 8 is closed and the upper mud discharging valve 9 is opened while the power supply unit 6 is started. Since the anode cable 13 and the cathode cable 14 are respectively connected with the anode and the cathode of the power supply unit 6, the anode cable 13 is connected with the anode electrode plate 17, and the cathode cable 14 is connected with the cathode electrode plate 15, a current loop is formed between the anode electrode plate 17 and the cathode electrode plate 15, water is electrolyzed on the surface of the anode electrode plate 17 and the surface of the cathode electrode plate 15 to generate oxygen and hydrogen respectively, and oxygen and hydrogen bubbles are combined with flocs accumulated on the surface of the cathode electrode plate 15, the surface of the anode electrode plate 17 or the top of the inclined tube 5 by controlling the intensity of the current. When the number of bubbles combined with the flocs is gradually increased, the buoyancy force borne by the flocs is greater than the gravity and the adsorption force of the flocs, the flocs start to move upwards, and the flocs continuously enter the water collecting tank 7 and are discharged out of the system through the upper mud discharging valve 9 and the auxiliary pipelines thereof under the action of continuous water inlet and buoyancy force; when the flocs accumulated on the surface of the cathode electrode plate 15, the surface of the anode electrode plate 17 or the top of the inclined tube 5 on the inclined tube wall 16 are removed, the switch of the power supply unit 6 is closed, the water outlet valve 8 is opened, the upper mud discharging valve 9 is closed, the normal operation mode is started, and the circulation is repeated.
As shown in fig. 2, in another embodiment, before the on-line cleaning mode of the inclined tube sedimentation tank is started, the power supply unit is made to output a small current, and the positive and negative electrodes are made to alternately act, so that flocs with positive or negative charges on the surfaces of the cathode electrode plate 15 and the anode electrode plate 17 are alternately separated from the surfaces, and are sunk into the sludge collection hopper 4 by gravity, and after multiple rounds of positive and negative electricity inversion, a large current is added to form bubbles on the surfaces of the positive and negative electrode plates, so as to enter the on-line cleaning mode.
In another embodiment, flocculating agents such as polyferric chloride and the like are added to form chlorine microbubbles on the surface of the cathode electrode plate 15 in the electrolysis process, hypochlorous acid is generated, algae attached to the top of the inclined tube 5 or other parts are inactivated and desorbed, and the inactivated algae are discharged out of the system along with online cleaning water flow.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, but rather the appended claims are intended to cover all such modifications and changes as fall within the true spirit and scope of the utility model.

Claims (2)

1. The utility model provides a can online cleaning's pipe chute sedimentation tank which characterized in that: comprises a water inlet (1), a water distribution pool (2), a water distribution tracery wall (3), a sludge collecting hopper (4), an inclined pipe (5), a cathode electrode plate (15) and an anode electrode plate (17); the top of the distribution pool (2) is provided with a water inlet (1), and the bottom is provided with a water distribution tracery wall (3); the distribution pool (2) is communicated with the sedimentation area through a distribution tracery wall (3), the bottom of the sedimentation area is provided with a mud collecting hopper (4), and the top of the sedimentation area is provided with an inclined pipe (5); a cathode electrode plate (15) and an anode electrode plate (17) are respectively arranged on two sides of an inclined tube wall (16) of the inclined tube (5); the anode cable (13) and the cathode cable (14) are respectively connected with the anode and the cathode of the power supply unit (6), the anode cable (13) is connected with the anode electrode plate (17), and the cathode cable (14) is connected with the cathode electrode plate (15).
2. The inclined tube sedimentation tank capable of being cleaned on line according to claim 1, wherein: the inclined pipe (5) is connected with a water collecting tank (7), the water collecting tank (7) is respectively connected with a water outlet valve (8) and an upper mud discharging valve (9), and the water collecting tank (7) is connected with a water outlet (10) through the water outlet valve (8); the water collecting tank (7) is connected with the lower sludge discharge waste water port (12) through the upper sludge discharge valve (9); the bottom of the sludge collecting hopper (4) is connected with a lower sludge discharge waste water port (12) through a lower sludge discharge valve (11).
CN202122516399.7U 2021-10-19 2021-10-19 Inclined tube sedimentation tank capable of being cleaned online Active CN216571680U (en)

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Application Number Priority Date Filing Date Title
CN202122516399.7U CN216571680U (en) 2021-10-19 2021-10-19 Inclined tube sedimentation tank capable of being cleaned online

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Application Number Priority Date Filing Date Title
CN202122516399.7U CN216571680U (en) 2021-10-19 2021-10-19 Inclined tube sedimentation tank capable of being cleaned online

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Publication Number Publication Date
CN216571680U true CN216571680U (en) 2022-05-24

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