CN208771217U - A kind of waste water treatment system with auto-cleaning structure thereof - Google Patents

Abstract

The utility model discloses a kind of waste water treatment systems with auto-cleaning structure thereof, including wastewater retentive slot, concentration water tank, concentrate retention basin, first filter, circulating pump, UF film filtering area, processing sink, rinse bath and controller, concentration water tank is connect with concentrate retention basin, first filter respectively by the concentrate drain pipe of bottom, first filter, circulating pump, UF film filtering area and concentration water tank constitute filtration cycle, and rinse bath, circulating pump and UF film filtering area constitute clean cycle；UF film filtering area includes flow direction control valve, the first flow direction pipe, the second flow direction pipe and several UF membrane modules, and between the first flow direction pipe and UF membrane module, UF membrane module and second flows to and be provided with cleaning ball trap between pipe.Waste liquid amount can be greatly decreased in the utility model, reduce trade waste processing cost, and rotating wash bowl, to the impurity of cleaning tubulose UF film inner wall, reduces the frequency of chemical cleaning, extend the service life of UF film, Automatic Control, low energy consumption toward ground return.

Description

A kind of waste water treatment system with auto-cleaning structure thereof

Technical field

The present invention relates to technical field of sewage purification more particularly to a kind of wastewater treatment systems with auto-cleaning structure thereof System.

Background technique

With the implementation of new environmental law, all kinds of cutting fluids that are arrived used in metal-processing industry, cleaning solution, release agent and It is higher and higher or even the problem of can nowhere arrange that electroplating effluent etc. all suffers from discharge costs.The difficulty in treatment of metal-processing industry waste liquid The COD too high levels for essentially consisting in its waste liquid, considerably beyond national emission standard.

In the prior art, the processing method of metal-processing industry waste liquid is at high cost, energy consumption is high, and often needs to use absorption The medicated premixes such as agent, coagulator, easily cause secondary pollution, and service life of equipment can also be greatly reduced.

Ultrafiltration is a kind of pressurization membrane separation technique, i.e., under pressure, passes through small molecule solute and solvent certain The special film in aperture, and macromolecular solute is prevented one side of film to be stayed in, so that macromolecular substances be made to have obtained portion from penetrating The purifying divided.Ultrafiltration is using pressure as one of membrane separation technique of motive force.

In ultra-filtration process, aqueous solution flows through film surface, less than the solvent (water) and small molecule of fenestra under pressure promotion Solute water permeable membrane becomes scavenging solution (cleaner liquid), and the solute bigger than fenestra and solute group are trapped, and is discharged, becomes with water flow Concentrate.Ultra-filtration process is dynamic filtration, and separation is completed under flow regime.

The fouling membrane cleaning of ultrafiltration apparatus mainly uses physical cleaning and chemical cleaning at present, and wherein physical cleaning is usually sharp With just wash, the gentle scouring of backwash is completed, but this cleaning method needs to stop normal filter progress, can reduce working efficiency, And chemical cleaning must use chemical agent, and can bring increased costs, reduce film service life and cleaning waste water is difficult etc. A series of problems.

Summary of the invention

In place of against the above deficiency, a kind of wastewater treatment system with auto-cleaning structure thereof is provided System, solves that current metal-processing industry treatment cost of waste liquor is high, service life of equipment is low, easily causes secondary pollution, ultrafiltration apparatus difficult It cleans, clean problem at high cost.

Present invention solves the technical problem that used scheme is: a kind of wastewater treatment system with auto-cleaning structure thereof System, including wastewater retentive slot, concentration water tank, concentrate retention basin, first filter, circulating pump, UF film filtering area, processing water Slot, rinse bath and controller, the wastewater retentive slot are connect by wastewater inlet pipe with the concentration water tank, the influent waste water Influent waste water pump is installed on pipe, liquid level sensor, the bottom of the concentration water tank are installed on the inner wall of the concentration water tank It is provided with concentrate drain pipe, the concentrate drain pipe is connect with the concentrate retention basin, on the concentrate drain pipe It is also connected with filtering branch pipe, the concentrate drain pipe and the junction for filtering branch pipe are provided with the first control valve, described The other end for filtering branch pipe connects the first filter, the other end of the first filter connect the circulating pump into Mouthful, the outlet of the circulating pump is connect with the UF film filtering area, and the other end of the UF film filtering area passes through filtering outlet tube Connect with the concentration water tank, the UF film filtering area also with processing sink connect, the both ends of the rinse bath respectively with circulation Import, the filtering outlet tube connection of pump, junction are respectively provided with purge control valve, and the rinse bath is provided with clear water, the liquid level Sensor, influent waste water pump, circulating pump, the first control valve, purge control valve are electrically connected with the controller,

The UF film filtering area includes flow direction control valve, the first flow direction pipe, the second flow direction is managed and several UF membrane modules, described Flow direction control valve flows to pipe with the outlet of circulating pump, the first flow direction pipe and second respectively and connect, the first flow direction pipe and second It flows to the other end of pipe connect with filtering outlet tube, the both ends of each UF membrane module manage with the first flow direction respectively, the Two flow to pipe connection,

Between the first flow direction pipe and the UF membrane module, the UF membrane module and described second flows to and is all provided between pipe It is equipped with cleaning ball trap,

The cleaning ball trap is hollow structure, is equipped with a catching net, the catching net in the cleaning ball trap Cleaning ball trap is divided into two chambers, a rotating wash bowl is equipped in the chamber of UF membrane module.

Further, the UF membrane module includes casing and several tubulose UF films being serially connected in casing, described sleeve pipe wall On offer processing water water outlet, the processing water water outlet by processing water outlet pipe with handle sink connect.

Further, the flow direction control valve is electrically connected with the controller.

Further, the UF membrane module is arranged in parallel.

Further, the UF membrane module manages vertical connect with the first flow direction pipe, the second flow direction respectively.

Further, the material of the rotating wash bowl is sponge.

Further, the mesh diameter of the catching net is less than the diameter of the rotating wash bowl.

Further, the diameter of the rotating wash bowl is α times of tubulose UF film diameter；Wherein, 1 < α < 1.05.

Further, turbidimeter is installed on the processing water outlet pipe.

Further, the first filter is active carbon filter.

The beneficial effects of the present invention are:

(1) using the physical method of UF film filtering, demulsification technology is not used, is added without using drugs such as adsorbent, coagulators Add agent, problem without secondary pollution；

(2) circulating filtration mode is used, waste liquid amount is greatly decreased, reduces trade waste processing cost；

(3) flow direction that can change liquid by flow direction control valve, catches the rotating wash bowl at rotating wash bowl round-trip UF membrane module both ends Device is caught, it is ceaselessly miscellaneous to the inner wall of tubulose UF film under conditions of not influencing normal filtration process using the frictional force of rotating wash bowl Matter is cleared up, and is saved the time of stop cleaning, is improved work efficiency, and is also greatly reduced the frequency of chemical cleaning, is prolonged The service life of UF film is grown.

(4) processing water can recycle, and qualified discharge processing also may be selected.

(5) low energy consumption for system operation, and running cost is low.

(6) by controller Automatic Control, the on-line monitoring of water quality and the long-range monitoring of equipment are realized.

Detailed description of the invention

Fig. 1 is the structural diagram of the present invention；

Fig. 2 is the structural schematic diagram of the UF film filtering area in the present invention；

Fig. 3 is the structural schematic diagram that ball trap is cleaned in the present invention；

Fig. 4 is the structural schematic diagram of the UF membrane module in the present invention；

In figure: 1, wastewater retentive slot；11, wastewater inlet pipe；12, influent waste water pumps；2, water tank is concentrated；21, concentrate is arranged Liquid pipe；22, the first control valve；23, branch pipe is filtered；3, concentrate retention basin；4, first filter；5, circulating pump；6, UF film mistake Filter area；61, outlet tube is filtered；62, flow direction control valve；63, the first flow direction pipe；64, the second flow direction pipe；65, UF membrane module；651, Casing；652, tubulose UF film；66, ball trap is cleaned；661, catching net；662, rotating wash bowl；7, sink is handled；71, water is handled Outlet pipe；72, turbidimeter；8, rinse bath；81, purge control valve.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

Embodiment: as shown in Figure 1, a kind of waste water treatment system with auto-cleaning structure thereof, including wastewater retentive slot 1, Water tank 2, concentrate retention basin 3, first filter 4, circulating pump 5, UF film filtering area 6, processing sink 7, rinse bath 8 and control is concentrated Device processed, wastewater retentive slot 1 are connect by wastewater inlet pipe 11 with concentration water tank 2, are equipped with influent waste water on wastewater inlet pipe 11 Pump 12 is concentrated on the inner wall of water tank 2 and is equipped with liquid level sensor, and the bottom of concentration water tank 2 is provided with concentrate drain pipe 21, dense Contracting liquid drain pipe 21 is connect with concentrate retention basin 3, and filtering branch pipe 23, concentrate drain are also connected on concentrate drain pipe 21 The junction of pipe 21 and filtering branch pipe 23 is provided with the first control valve 22, and the other end of filtering branch pipe 23 connects first filter 4, The import of the other end connection circulating pump 5 of first filter 4, the outlet of circulating pump 5 are connect with UF film filtering area 6, the filtering of UF film The other end in area 6 is connect by filtering outlet tube 61 with concentration water tank 2, and UF film filtering area 6 is also connect with processing sink 7, is cleaned The both ends of slot 8 are connect with the import of circulating pump 5, filtering outlet tube 61 respectively, and junction is respectively provided with purge control valve 81, rinse bath 8 are provided with clear water, liquid level sensor, influent waste water pump 12, circulating pump 5, the first control valve 22, purge control valve 81 with control Device electrical connection.

Liquid level sensor is preset with upper limit level value and bottom limit level value, and when system brings into operation, controller opens waste water Waste water in wastewater retentive slot 1 is pumped into concentration water tank 2 by intake pump 12, when the liquid level in concentration water tank 2 reaches liquid level When the upper limit level value of sensor, controller completes following control operation: closing influent waste water pump 12, the first control valve 22 of control The connection that water tank 2 and first filter 4 is concentrated is opened, the connection of concentration water tank 2 and concentrate retention basin 3 is closed, opens circulation Pump 5.The above-mentioned control operation of controller represents system and starts filtering and concentrating liquid, and water tank 2, first filter 4, circulating pump 5 is concentrated Filtration cycle is constituted with UF film filtering area 6；

When the liquid level being concentrated in water tank 2 drops to the bottom limit level value of liquid level sensor, controller is completed following Control operation: the first control valve 22 of control opens the connection of concentration water tank 2 and concentrate retention basin 3, closes and water tank 2 and the is concentrated The connection of one filter 4.The above-mentioned control operation of controller represents concentrate filtering and completes, and in the vertical direction, water tank 2 is concentrated It is set to 3 top of concentrate retention basin, the concentrate after decrement treatment is concentrated under the effect of gravity, flows into concentrate retention basin 3 It is interior；

When be concentrated water tank 2 in liquid level be 0 when, represent concentrate filter process and be fully completed, controller complete with Lower control operation: control clear water control valve 81 closes filtering outlet tube 61 and the connection of water tank 2 is concentrated, opened to filter out liquid pipe 61 With the connection of Rinsing Area 8, the connection of first filter 4 and circulating pump 5 is closed, opens the connection of circulating pump 5 and Rinsing Area 8.Control The cleaning process that the above-mentioned control operation of device processed represents system brings into operation, and rinse bath 8, circulating pump 5 and UF film filtering area 6 are constituted Clean cycle；

Controller is preset with scavenging period, and after reaching scavenging period, controller completes following control operation: control clear water control The opened connection for filtering out liquid pipe 61 and water tank 2 being concentrated of valve 81 processed, closes the connection of filtering outlet tube 61 and Rinsing Area 8, opens The connection of first filter 4 and circulating pump 5 closes the connection of circulating pump 5 and Rinsing Area 8, opens influent waste water pump 12, closes and follow Ring pump 5, the first control valve 22 of control open the connection of concentration water tank 2 and first filter 4, close concentration water tank 2 and concentrate The connection of retention basin 3.The above-mentioned control operation of controller represents cleaning process completion, concentration water tank 2, first filter 4, circulation Pump 5 and UF film filtering area 6 reconstitutes filtration cycle, and system will start the filter process of next round.

As shown in Fig. 2, UF film filtering area 6 includes flow direction control valve 62, first flows to pipe 63, second flows to pipe 64 and several UF membrane module 65, flow direction control valve 62 flow to pipe 63 and second with the outlet of circulating pump 5, first respectively and flow to pipe 64 and connect, and One, which flows to pipe 63 and second, flows to the other end of pipe 64 and connect with filtering outlet tube 61, and the both ends of each UF membrane module 65 are divided equally Pipe 63 is not flowed to first, second pipe is flowed to and connect 64,

It first flows between pipe 63 and UF membrane module 65, UF membrane module 65 and second flows to and is provided with cleaning between pipe 64 Ball trap 66.

As shown in figure 3, cleaning ball trap 66 is hollow structure, it is equipped with a catching net 661 in cleaning ball trap 66, is caught It catches net 661 and is divided into two chambers for ball trap 66 is cleaned, a rotating wash bowl 662 is equipped in the chamber of UF membrane module 65, Rotating wash bowl 662 (preferably) is sponge rotating wash bowl, selects sponge material that rotating wash bowl 662 can be prevented to the inner wall of tubulose UF film 652 Cause to damage, catching net 661 is used to limit the scope of activities of rotating wash bowl 662, guarantee rotating wash bowl 662 can only back and forth movement in two It cleans between ball trap 66.

In the present embodiment, the diameter of rotating wash bowl 662 is α times of 652 diameter of tubulose UF film, and 1 < α < 1.05 is defined The diameter of rotating wash bowl 662, guaranteeing can be to tubulose when rotating wash bowl 662 passes through tubulose UF film 652 under the thrust of liquid 652 inner wall of UF film rubs, and clears up the impurity of inner wall, while in turn ensuring that rotating wash bowl 662 will not be led because diameter is excessive Cause the inordinate wear to 652 inner wall of tubulose UF film.

In the present embodiment, flow direction control valve 62 is electrically connected with the controller, and controller controls according to the preset time interval Flow direction control valve 62 switch concentrate flow direction, flow direction control valve 62 only have following two state: open first flow to 63 valve of pipe, When closing second flows to 64 valve of pipe, concentrate flows to first and flows to pipe 63；Open second flow to 64 valve of pipe, close it is first-class When to 63 valve of pipe, concentrate flows to second and flows to pipe 64.

Controller automatically controls liquid flow direction by flow direction control valve 2, makes round-trip 65 both ends of UF membrane module of rotating wash bowl 662 Ball trap 66 is cleaned, using the frictional force of rotating wash bowl 662, under conditions of not influencing normal filtration process, ceaselessly to UF The inner wall impurity of tubulose UF film 652 in membrane module 65 is cleared up, and the time of stop cleaning has been saved, and improves work effect Rate is also greatly reduced the frequency of chemical cleaning, with this method that rotating wash bowl 662 cleans, can extend UF membrane module 65 3 The service life in year.

As shown in figure 4, UF membrane module 65 includes casing 651 and several tubulose UF films 652 being serially connected in casing 651, pipe Shape UF film 652 using concatenation by the way of, can in a limited space in improve concentrate filtration contact area, reduce entire system The occupied area of system, processing water water outlet is offered on 651 wall of casing, and processing water water outlet passes through processing water outlet pipe 71 and place It manages sink 7 to connect, handles and turbidimeter 72 is installed on water outlet pipe 71, turbidimeter 72 is used to monitor the transparency of processing water, Whether detectable UF membrane module 65 has damage, and recycling or qualified discharge may be selected in the processing water handled in sink 7.

When work, concentrate from be tightly attached on the inside of tubulose UF film 652 by when, only water energy penetrates, oil and other are organic Object is trapped in tubulose UF film 652, and remaining concentrate returns iterative cycles in concentration water tank 2 again.It is dense with the discharge of processing water The water level decreasing of shrink case 2, is concentrated to after the water level of setting to run and is automatically stopped.In continuous cyclic process, processing water is continuous It is discharged, final concentration decrement can reduce by 90% treatment cost of waste liquor to 10%-20%.

The above, only presently preferred embodiments of the present invention, are not intended to limit the invention, all skills according to the present invention Art any trickle amendment, equivalent replacement and improvement substantially to the above embodiments, should be included in technical solution of the present invention Protection scope within.

Claims (10)

1. a kind of waste water treatment system with auto-cleaning structure thereof, which is characterized in that including wastewater retentive slot (1), condensed water Case (2), concentrate retention basin (3), first filter (4), circulating pump (5), UF film filtering area (6), processing sink (7), cleaning Slot (8) and controller, the wastewater retentive slot (1) are connect by wastewater inlet pipe (11) with the concentration water tank (2), described useless Influent waste water pump (12) is installed on water water inlet pipe (11), liquid level sensor is installed on the inner wall of concentration water tank (2), institute The bottom for stating concentration water tank (2) is provided with concentrate drain pipe (21), and the concentrate drain pipe (21) and the concentrate are store Stay slot (3) to connect, be also connected with filtering branch pipe (23) on the concentrate drain pipe (21), the concentrate drain pipe (21) with The junction of filtering branch pipe (23) is provided with the first control valve (22), described in the other end connection of filtering branch pipe (23) First filter (4), the other end of the first filter (4) connect the import of the circulating pump (5), the circulating pump (5) Outlet connect with the UF film filtering area (6), the other end of the UF film filtering area (6) passes through filtering outlet tube (61) and institute Concentration water tank (2) connection is stated, the UF film filtering area (6) also connect with processing sink (7), the both ends point of the rinse bath (8) It is not connect with the import of circulating pump (5), filtering outlet tube (61), junction is respectively provided with purge control valve (81), the rinse bath (8) it is provided with clear water, the liquid level sensor, influent waste water pump (12), circulating pump (5), the first control valve (22), cleaning control Valve (81) is electrically connected with the controller,

The UF film filtering area (6) includes flow direction control valve (62), the first flow direction pipe (63), the second flow direction pipe (64) and several UF Membrane module (65), the flow direction control valve (62) are managed with the outlet of circulating pump (5), the first flow direction pipe (63) and the second flow direction respectively (64) it connects, the other end of the first flow direction pipe (63) and the second flow direction pipe (64) is connect with filtering outlet tube (61), institute The both ends for stating each UF membrane module (65) are connect with the first flow direction pipe (63), the second flow direction pipe (64) respectively,

First flow direction is managed between (63) and the UF membrane module (65), the UF membrane module (65) and second flow direction are managed (64) cleaning ball trap (66) is provided between,

The cleaning ball trap (66) is hollow structure, is equipped with a catching net (661) in the cleaning ball trap (66), institute It states catching net (661) and cleaning ball trap (66) is divided into two chambers, set in the chamber of UF membrane module (65) There are a rotating wash bowl (662).

2. a kind of waste water treatment system with auto-cleaning structure thereof according to claim 1, which is characterized in that the UF Membrane module (65) includes casing (651) and several tubulose UF films (652) being serially connected in casing (651), described sleeve pipe (651) wall On offer processing water water outlet, the processing water water outlet by processing water outlet pipe (71) with handle sink (7) connect.

3. a kind of waste water treatment system with auto-cleaning structure thereof according to claim 1, which is characterized in that the stream It is electrically connected to control valve (62) with the controller.

4. a kind of waste water treatment system with auto-cleaning structure thereof according to claim 1, which is characterized in that the UF Membrane module (65) is arranged in parallel.

5. a kind of waste water treatment system with auto-cleaning structure thereof according to claim 1, which is characterized in that the UF Membrane module (65) respectively with the first flow direction pipe (63), (64) are vertical connect for the second flow direction pipe.

6. a kind of waste water treatment system with auto-cleaning structure thereof according to claim 1, which is characterized in that described clear The material for washing ball (662) is sponge.

7. a kind of waste water treatment system with auto-cleaning structure thereof according to claim 1, which is characterized in that described to catch The mesh diameter for catching net (661) is less than the diameter of the rotating wash bowl (662).

8. a kind of waste water treatment system with auto-cleaning structure thereof according to any one of claim 2 to 7, special Sign is that the diameter of the rotating wash bowl (662) is α times of tubulose UF film (652) diameter；Wherein, 1 < α < 1.05.

9. a kind of waste water treatment system with auto-cleaning structure thereof according to claim 2, which is characterized in that the place Turbidimeter (72) are installed in reason water outlet pipe (71).

10. a kind of waste water treatment system with auto-cleaning structure thereof according to claim 1, which is characterized in that described First filter (4) is active carbon filter.