CN113998815A - Small-size effluent treatment plant of integration industry - Google Patents

Abstract

The invention discloses an integrated industrial small-sized wastewater treatment device which comprises a water inlet pipeline and an electrolytic reaction box, wherein the water inlet pipeline is connected to the water inlet end of the electrolytic reaction box, an electrolytic reactor is arranged in the electrolytic reaction box, the water outlet end of the electrolytic reaction box is connected with a stirring dosing box, a stirring device is arranged in the stirring dosing box, the water outlet end of the stirring dosing box is provided with an air floatation tank, the air floatation tank is connected with an air dissolving device, a sedimentation tank capable of separating mud and water is arranged at the overflow water outlet position of the air floatation tank, and a scum removing device is arranged above the sedimentation tank. The invention has the advantages of integration of electrolysis and chemical sedimentation, small size, small occupied area, simple use, easy control and low cost.

Description

Small-size effluent treatment plant of integration industry

Technical Field

The invention relates to the technical field of wastewater treatment devices, in particular to an integrated industrial small-sized wastewater treatment device.

Background

The water quantity existing in the industrial wastewater treatment is small, the treatment target of each unit is relatively single, for example, the air floatation method mainly comprises the steps of adding a medicament, stirring, floating sludge on the surface through the release of a dissolved air pump to realize solid-liquid separation, only solid-liquid separation can be carried out in the partial process section, and separated waste slurry needs to be stored in a sludge tank and then pumped into a plate and frame filter press through a diaphragm pump to carry out mud pressing treatment. All the operation units are relatively dispersed, the number of connectors is large, the electric control and pipeline is too long, and the occupied area is large. The sedimentation method is also a similar working principle, and only the sludge after mud-water separation sinks to the bottom, other procedures are still long, and the treatment requirement of the sewage with small water volume is difficult to meet.

The present invention has been made based on such a situation.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a small industrial wastewater treatment device which is integrated, small in size, small in occupied area, simple to use, easy to control and low in cost and is suitable for treating industrial wastewater.

The invention is realized by the following technical scheme:

the utility model provides a small-size effluent treatment plant of integration industry, includes water intake pipe and electrolytic reaction case, just the water intake pipe connects the end of intaking at electrolytic reaction case, the electrolytic reaction incasement is equipped with the electrolytic reaction ware, electrolytic reaction case's play water end is connected with the stirring dosing tank, be equipped with agitating unit in the stirring dosing tank, stirring dosing tank play water end is equipped with the air supporting pond, the air supporting pond is connected with the dissolved air device, the overflow play water department in air supporting pond is equipped with the sedimentation tank that can separate muddy water, the sedimentation tank top is equipped with dross remove device.

According to the integrated industrial small-sized wastewater treatment device, the electrolytic reactor comprises a plurality of electrified cathode plates and anode plates which are distributed at intervals, and a plurality of middle electrode plates are arranged between the adjacent cathode plates and the adjacent anode plates at intervals.

According to the integrated industrial small-sized wastewater treatment device, the cathode plate, the anode plate and the middle electrode plate are all rare metal electrode plates.

According to the integrated small industrial wastewater treatment device, the water inlet end of the electrolytic reaction box is arranged at the lower part of the electrolytic reaction box, the water outlet end of the electrolytic reaction box is arranged at the upper part of the electrolytic reaction box, and the electrolytic reactor is arranged between the water inlet end and the water outlet end of the electrolytic reaction box.

According to the integrated small industrial wastewater treatment device, at least two chambers are arranged in the electrolytic reaction tank, at least one group of electrolytic reactors are respectively arranged in each chamber, an overflow channel is arranged between every two adjacent chambers, and the overflow channel is communicated with an overflow water outlet at the top of one chamber and the bottom of the other chamber.

According to the integrated industrial small-sized wastewater treatment device, the water inlet end of the air dissolving device is connected to the middle part of the sedimentation tank, and the water outlet end of the air dissolving device is connected to the middle part or the bottom of the air flotation tank.

The integrated industrial small-sized wastewater treatment device comprises a driving wheel with a driving function, a driven wheel and a transmission belt connected between the driving wheel and the driven wheel, wherein a scraping plate for scraping scum is fixedly connected to the transmission belt.

According to the integrated industrial small-sized wastewater treatment device, the scum removing device further comprises a scum collecting tank arranged at one end of the transmission belt, and a scum discharging port is arranged at one end of the scum collecting tank.

According to the integrated industrial small-sized wastewater treatment device, the sedimentation tank comprises a bottom sedimentation area, a middle clear water area and an upper floating slag area, the outer end of the upper floating slag area is provided with an overflow area, an overflow baffle is arranged between the overflow area and the upper floating slag area, the middle clear water area and the overflow area are respectively provided with a water outlet, and the bottom sedimentation area is provided with a sludge discharge port.

According to the integrated industrial small-sized wastewater treatment device, the water outlet is connected with the sand filter tank through the connecting pipeline, and the sludge discharge port is connected with the sludge dewatering machine through the connecting pipeline.

Compared with the prior art, the invention has the following advantages:

the invention firstly uses an electrolytic reactor to electrolyze the sewage to reduce the COD of the sewage, then adds a coagulation-aiding medicament in a stirring dosing tank and stirs the mixture to flocculate partial pollutants in the sewage, and then uses an air dissolving device to generate micro-bubbles which adsorb the flocculates to form alum flocs which float on the water surface. After the sewage enters the sedimentation tank, scum and alum floc can be removed by using a scum removing device, and silt is settled at the bottom. The clear water and the sludge can be further treated subsequently. The invention is suitable for treating spraying or paint spraying wastewater, has high integration degree, integrates the functions of electrolysis, chemical agent flocculation, air floatation, sedimentation, scum removal, filtration, sludge dehydration and the like, and has high integration degree, small occupied area, low cost and high sewage treatment efficiency. All the operation units are relatively centralized, the electric control and the pipeline are short, the control is easy, and the use is simple.

Drawings

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an exploded view of an electrolytic reaction tank;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a sectional view of an electrolytic reaction tank;

FIG. 5 is a perspective view of the agitation dosing tank, the floatation tank and the sedimentation tank;

FIG. 6 is an exploded view of the agitation dosing tank, flotation tank and settling tank sections;

FIG. 7 is a sectional view of the agitation dosing tank, the floatation tank, and the sedimentation tank portion.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.

The integrated small industrial wastewater treatment device shown in fig. 1 to 7 comprises a water inlet pipeline and an electrolytic reaction box 1, wherein the water inlet pipeline is connected to a water inlet end of the electrolytic reaction box 1, an electrolytic reactor 11 is arranged in the electrolytic reaction box 1, a water outlet end of the electrolytic reaction box 1 is connected with a stirring dosing box 2, a stirring device 21 is arranged in the stirring dosing box 2, a water outlet end of the stirring dosing box 2 is provided with an air flotation tank 3, the air flotation tank 3 is connected with an air dissolving device 4, a sedimentation tank 5 capable of separating mud and water is arranged at an overflow water outlet of the air flotation tank 3, and a scum removing device 6 is arranged above the sedimentation tank 5. In a more specific embodiment of the invention, the water outlet 55 is connected with a sand filter tank 7 through a connecting pipeline for further filtering; the sludge discharge port 511 is connected with a sludge dewatering machine 8 through a connecting pipeline and is used for dewatering sludge. A sludge collecting pool is also arranged between the sludge discharge port 511 and the sludge dewatering machine 8. After the mixture of the sludge and the sewage is accumulated to a certain amount in the sludge collection tank, the sludge dewatering machine 8 is started to dewater the sludge. Preferably, the stirring dosing tank 2 and the air flotation tank 3 are both arranged in the sedimentation tank 5.

The invention firstly uses an electrolytic reactor 11 to electrolyze the sewage to reduce the COD of the sewage, then adds a coagulation-aiding agent into a stirring dosing tank 2 to stir so as to flocculate partial pollutants in the sewage, and then uses an air dissolving device 4 to generate micro bubbles which adsorb the flocculates to form alum flocs which float on the water surface. After the sewage enters the sedimentation tank 5, scum and alum floc (herein alum floc is generally floating on the water surface after being adsorbed) can be removed by a scum removing device 6, and silt is settled at the bottom. The clear water and the sludge can be further treated subsequently. The invention is suitable for treating spraying or paint spraying wastewater, has high integration degree, integrates the functions of electrolysis, chemical agent flocculation, air floatation, sedimentation, scum removal, filtration, sludge dehydration and the like, and has high integration degree, small occupied area, low cost and high sewage treatment efficiency. All the operation units are relatively centralized, the electric control and the pipeline are short, the control is easy, and the use is simple.

In a more specific embodiment of the present invention, the electrolytic reactor 11 includes a plurality of electrically-energized and spaced cathode plates 111 and anode plates 112, and a plurality of intermediate electrode plates 113 are spaced between adjacent cathode plates 111 and anode plates 112. Preferably five sets of electrode plates are used as a circuit. The cathode plate 111 and the anode plate 112 are respectively electrically connected with the cathode and the anode of a power supply, the middle electrode plate 113 is not electrified, but is inserted into a sewage dielectric medium, so that the electric conduction effect is achieved, the contact area between the electrode plates and the sewage is increased, and the electrolysis efficiency can be improved. The electrolytic reactor 11 electrolyzes the sewage by using direct current, and metal hydroxide flocs and hydrogen gas are generated on the electrode plates under the condition of electrifying to reduce the COD of the sewage.

In a more specific embodiment of the present invention, the cathode plate 111, the anode plate 112 and the middle electrode plate 113 are all rare metal electrode plates. Therefore, the electrolytic cell is more durable, is not easy to corrode, and has better electrolytic effect.

In a more specific embodiment of the present invention, the water inlet end of the electrolytic reaction tank 1 is provided at the lower part thereof, the water outlet end of the electrolytic reaction tank 1 is provided at the upper part thereof, and the electrolytic reactor 11 is provided between the water inlet end and the water outlet end of the electrolytic reaction tank 1. So that the sewage can be in contact with the electrolytic reactor 11 for a longer time and in a larger area in the flowing direction of the sewage, and the electrolytic efficiency is improved.

In a more specific embodiment of the invention, at least two chambers 12 are arranged in the electrolytic reaction box 1, at least one group of electrolytic reactors 11 are respectively arranged in each chamber 12, an overflow channel 13 is arranged between every two adjacent chambers 12, and the overflow channel 13 is communicated with an overflow water outlet at the top of one chamber 12 and the bottom of the other chamber 12. Therefore, the sewage firstly enters the bottom of the first chamber 12, and the sewage is electrolyzed for a certain time in the process of flowing to the upper part of the first chamber 12; the sewage passes through the overflow channel 13 into the bottom of the other chamber 12, and is subjected to electrolysis again while flowing to the upper part thereof. Therefore, each section of water flow can be electrolyzed for at least two times, the electrolysis is more uniform, the electrolysis time is longer, and the full electrolysis is facilitated.

A dosing port is arranged in the stirring dosing tank 2, and the stirring device 21 comprises a stirring blade and a driver thereof. The wastewater often contains fine suspended matters and colloidal pollutants which can not be removed by a natural sedimentation method, and for the wastewater, chemical agents (PAM agents, PAC agents and other coagulation-aiding agents) are firstly added to destroy stable dispersion systems formed by the colloids and the fine suspended matters in the water, so that the colloids and the fine suspended matters are gathered into flocculating constituents with obvious sedimentation performance, and then the flocculating constituents are conveniently separated by a gravity method. Coagulant aids such as PAM and PAC are added from the drug adding port, and colloid in the sewage or sludge is quickly flocculated by the coagulant aids or hydrolysate thereof, so that large-particle precipitate can be conveniently separated. When adding medicine, agitating unit 21 starts stirring simultaneously for medicament and sewage intensive mixing.

Preferably, the water inlet end of the stirring dosing tank 2 is arranged at the bottom of the stirring dosing tank 2, and the water outlet end of the stirring dosing tank 2 is arranged at the upper part of the stirring dosing tank 2, so that the chemicals and the sewage can be fully mixed.

In a more specific embodiment of the invention, the water inlet end of the air dissolving device 4 is connected to the middle part of the sedimentation tank 5, and the water outlet end of the air dissolving device 4 is connected to the middle part or the bottom part of the air flotation tank 3. The air dissolving device 4 comprises an air dissolving tank 41 and an air dissolving pump 42. That is, the air dissolving device 4 sucks a part of relatively clear water from the middle part of the sedimentation tank 5, then sucks air, dissolves the air in the water by a pressurizing method, and releases a large amount of micro bubbles under a reduced pressure condition. The fine bubbles enter from the bottom of the flotation tank 3 and then are adsorbed together with flocs in the sewage to form alumen ustum, so that the whole specific gravity of the alumen ustum is smaller than that of the water and the alumen ustum floats on the water surface (the sewage from the stirring dosing tank 2 also enters the bottom of the flotation tank 3, and a plurality of flocs exist in the sewage).

In a more specific embodiment of the present invention, the scum removing apparatus 6 comprises a driving wheel 61 with a driving function, a driven wheel 62, and a transmission belt 63 connected between the driving wheel 61 and the driven wheel 62, wherein a scraper 64 for scraping scum is fixedly connected to the transmission belt 63. That is, the scraper 64 rotates along with the belt 63 to scrape off the scum and the alumen ustum floating on the water surface, thereby realizing solid-liquid separation.

In a more specific embodiment of the present invention, the scum removing apparatus 6 further comprises a scum collecting tank 65 disposed at one end of the belt 63, and a scum discharging port 651 is disposed at one end of the scum collecting tank 65. Namely, the scrAN _ SNer 64 scrAN _ SNs the scum and the alum flocs floating on the water surface into the scum collecting tank 65 and discharges the scum from the scum outlet 651 in time, so that the scum is convenient to clean.

In a more specific embodiment of the present invention, the sedimentation tank 5 comprises a bottom sedimentation zone 51, a middle clear water zone 52 and an upper scum zone 53, an overflow zone 54 is provided at the outer end of the upper scum zone 53, an overflow baffle 541 is provided between the overflow zone 54 and the upper scum zone 53, the middle clear water zone 52 and the overflow zone 54 are respectively provided with a water outlet 55, and the bottom sedimentation zone 51 is provided with a sludge outlet 511. After the sewage enters the sedimentation tank 5, the silt slowly sinks to the bottom, the scum floats on the water surface, and the middle part of the sewage is cleaner water. When the water is full, part of the water overflows from the overflow baffle 541 to the overflow area 54, and the water overflowing into the overflow area 54 is also clean water.

The working process of the invention is that industrial wastewater from a workshop enters a regulating tank for precipitation, oil removal and pH regulation. Then the wastewater is lifted by a pump, passes through a flow regulating device and then enters the electrolytic reaction box 1, and sequentially passes through each group of electrolytic reactors 11, and the electrolytic reactors 11 are electrified to electrolyze and produce metal hydroxide flocs and hydrogen so as to reduce the COD of the wastewater. The treated sewage enters a stirring and dosing tank 2, and is stirred while dosing (coagulant aids such as PAM and PAC) so that the chemicals and the sewage are fully mixed. The sewage from the stirring dosing tank 2 enters an air floatation tank 3, a gas dissolving device 4 generates water in which a large amount of air is dissolved, and the sewage from the stirring dosing tank 2 and the water from the gas dissolving device 4 are mixed to form alum flocs. Then the sewage with alum flocs enters a sedimentation tank 5, silt settles to a bottom sedimentation area 51, a scraper plate 64 of a scum removing device 6 continuously scrapes off alum flocs and scum floating on the surface, and cleaner water stays in a middle cleaning area 52 of the sedimentation tank 5 and flows out from a water outlet 55; and part of the water overflows to the overflow area 54 and finally flows out of a water outlet 55 at the bottom of the overflow area 54. The relatively clear water flowing out of the water outlet 55 can be stored in a clear water pond for reuse, and can also enter the sand filtering tank 7 for further filtering. And the solid-liquid mixture from the sludge discharge port 511 and the slag discharge port 651 of the bottom settling zone 51 enters a sludge dewatering machine 8 (a screw-type sewage dewatering machine) for sludge-water separation. And the separated water enters a clean water tank for storage, and the water in the clean water tank is reused in a workshop through a water pump after reaching a certain amount. The generated sludge and residues are discharged into a sludge collecting pool for storage, pressed into sludge cakes after reaching a certain amount, bagged and transported outside.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. The utility model provides a small-size effluent treatment plant of integration industry which characterized in that: including water intake pipe and electrolytic reaction case (1), just the end of intaking of electrolytic reaction case (1) is connected to the water intake pipe, be equipped with electrolytic reaction ware (11) in electrolytic reaction case (1), the play water end of electrolytic reaction case (1) is connected with stirring dosing tank (2), be equipped with agitating unit (21) in stirring dosing tank (2), stirring dosing tank (2) play water end is equipped with air supporting pond (3), air supporting pond (3) are connected with dissolved air device (4), the overflow play water department of air supporting pond (3) is equipped with sedimentation tank (5) that can separate muddy water, sedimentation tank (5) top is equipped with dross remove device (6).

2. The integrated small-sized industrial wastewater treatment device according to claim 1, wherein: the electrolytic reactor (11) comprises a plurality of electrified cathode plates (111) and anode plates (112) which are distributed at intervals, and a plurality of middle electrode plates (113) are arranged between the adjacent cathode plates (111) and anode plates (112) at intervals.

3. The integrated small-sized industrial wastewater treatment device according to claim 2, wherein: the cathode plate (111), the anode plate (112) and the middle electrode plate (113) are all rare metal electrode plates.

4. An integrated industrial small-sized wastewater treatment plant according to any one of claims 1 to 3, characterized in that: the water inlet end of the electrolytic reaction box (1) is arranged at the lower part of the electrolytic reaction box, the water outlet end of the electrolytic reaction box (1) is arranged at the upper part of the electrolytic reaction box, and the electrolytic reactor (11) is arranged between the water inlet end and the water outlet end of the electrolytic reaction box (1).

5. The integrated small-sized industrial wastewater treatment device according to claim 4, wherein: at least two chambers (12) are arranged in the electrolytic reaction box (1), at least one group of electrolytic reactors (11) are respectively arranged in each chamber (12), an overflow channel (13) is arranged between every two adjacent chambers (12), and the overflow channel (13) is communicated with an overflow water outlet at the top of one chamber (12) and the bottom of the other chamber (12).

6. The integrated small-sized industrial wastewater treatment device according to claim 1, wherein: the water inlet end of the air dissolving device (4) is connected to the middle of the sedimentation tank (5), and the water outlet end of the air dissolving device (4) is connected to the middle or the bottom of the air flotation tank (3).

7. The integrated small-sized industrial wastewater treatment device according to claim 1, wherein: the scum removing device (6) comprises a driving wheel (61) with a driving function, a driven wheel (62) and a transmission belt (63) connected between the driving wheel (61) and the driven wheel (62), wherein a scraping plate (64) used for scraping scum is fixedly connected to the transmission belt (63).

8. The integrated small-sized industrial wastewater treatment device according to claim 7, wherein: the scum removing device (6) further comprises a scum collecting tank (65) arranged at one end of the transmission belt (63), and one end of the scum collecting tank (65) is provided with a scum outlet (651).

9. The integrated small-sized industrial wastewater treatment device according to claim 1, wherein: the sedimentation tank (5) comprises a bottom sedimentation area (51), a middle clear water area (52) and an upper scum area (53), an overflow area (54) is arranged at the outer end of the upper scum area (53), an overflow baffle (541) is arranged between the overflow area (54) and the upper scum area (53), the middle clear water area (52) and the overflow area (54) are respectively provided with a water outlet (55), and the bottom sedimentation area (51) is provided with a sludge discharge port (511).

10. The integrated small-sized industrial wastewater treatment device according to claim 9, wherein: the water outlet (55) is connected with a sand filter tank (7) through a connecting pipeline, and the sludge discharge port (511) is connected with a sludge dewatering machine (8) through a connecting pipeline.

Images