CN214299596U

CN214299596U - Electroplating wastewater treatment system

Info

Publication number: CN214299596U
Application number: CN202022927218.5U
Authority: CN
Inventors: 陈其美; 安仁彬; 成浩
Original assignee: Guizhou Chuangweidao Environment Technology Co ltd
Current assignee: Guizhou Chuangweidao Environment Technology Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-09-28
Anticipated expiration: 2030-12-09

Abstract

The utility model discloses an electroplating wastewater treatment system, which comprises a wastewater collection pool, wherein a pH adjusting pool I, a demulsification device, a pH adjusting pool II, a Fenton advanced oxidation device, a pH adjusting pool coagulation pool III, a flocculation pool, a sedimentation pool and a supernatant collection cylinder are sequentially arranged behind the wastewater collection pool, and a circulating pipe I circulating to the wastewater collection pool is arranged on the supernatant collection cylinder; an electroplating sewage processor is arranged behind the sedimentation tank; the utility model discloses can replace current electroplating effluent biochemical treatment, solve that prior art equipment is comparatively complicated, reaction time is slower, and microorganism debugging cycle length is long, and it is fast to lead to the microorganism to change the frequency because of the quality of water fluctuation, need artifical throwing in a large number to go on controlling the problem to the activity of microorganism with microorganism nutrient source during equipment is out of service.

Description

Electroplating wastewater treatment system

Technical Field

The utility model relates to an electroplating wastewater treatment system, which belongs to the field of electroplating wastewater treatment tools.

Background

The components of the electroplating wastewater are very complex, and besides cyanide (CN-) containing wastewater and acid-base wastewater, heavy metal wastewater is a wastewater category with extremely high potential hazard in the electroplating industry; heavy metal elements contained in heavy metal wastewater are classified, and generally classified into wastewater containing chromium (Cr), wastewater containing nickel (Ni), wastewater containing cadmium (Cd), wastewater containing copper (Cu), wastewater containing zinc (Zn), wastewater containing gold (Au), wastewater containing silver (Ag), and the like. The components are not easy to control, and some of the components belong to carcinogenic, teratogenic and mutagenic highly toxic substances.

The characteristics of the electroplating wastewater are as follows: (1) the components are complex, and pollutants can be divided into organic pollutants and inorganic pollutants; (2) the water quality has large variation range, various production wastewater pollutants have various types, and the COD variation coefficient is large; (3) the wastewater has high toxicity and contains a large amount of heavy metal ions, and the wastewater can cause great pollution to surrounding water bodies if directly discharged without treatment.

In the past, the traditional process for treating the electroplating wastewater mostly adopts oil removal demulsification and biochemical reaction, and the process flow is as follows: the wastewater collection tank, the pH adjusting tank I, the demulsification device, the pH adjusting tank II, the Fenton advanced oxidation device, the pH adjusting tank coagulation tank III, the flocculation tank, the sedimentation tank, the pH adjusting tank, the anaerobic tank, the aerobic tank, the ozone biological filter, the clean water tank and the wastewater reach the discharge standard.

The traditional process is characterized in that emulsion and grease in wastewater are removed by deoiling and demulsifying, heavy metal in the wastewater and biodegradability of enhanced water are removed by Fenton advanced oxidation, and then organic matters in the wastewater are degraded by anaerobic and facultative oxygen to reach the standard and be discharged, so that the defects of the traditional process are as follows: 1. the required amount of the added medicine is large, and the cost is high. 2. The amount of sludge generated by adding a large amount of medicines correspondingly increases subsequent cost and increases cost correspondingly. 3. The organic matters in the wastewater cannot be completely removed by degrading the organic matters by using microorganisms, and a part of organic matters which are difficult to degrade exist after treatment. 4. The microorganism debugging period is longer, and a longer time is needed for culture and domestication after the microorganism is replaced. 5. The reaction time is long, certain requirements are required for the water quality stability, and if the fluctuation is large, unnecessary damage can be caused to microorganisms in the subsequent biochemical treatment, so that the microorganisms need to be re-cultured and domesticated, and the treatment time is prolonged.

Namely: an electroplating wastewater treatment system is needed at present, which can replace the existing electroplating wastewater biochemical treatment and solve the problems that the prior art has complex equipment, slow reaction time, long microorganism debugging period, high microorganism replacement frequency caused by water quality fluctuation and the need of manually adding a large amount of microorganism nutrient sources to control the activity of microorganisms during the equipment outage period.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide an electroplating wastewater treatment system, which can replace the existing electroplating wastewater biochemical treatment, and solve the problems that the prior art has complicated equipment, slow reaction time, long microorganism debugging period, fast microorganism replacement frequency caused by water quality fluctuation and needs to manually and massively add microorganism nutrient sources to control the activity of microorganisms during the equipment outage period; the defects of the prior art can be overcome.

The technical scheme of the utility model is that: an electroplating wastewater treatment system comprises a wastewater collection pool, wherein a pH adjusting pool I, a demulsification device, a pH adjusting pool II, a Fenton advanced oxidation device, a pH adjusting pool coagulation pool III, a flocculation pool, a sedimentation pool and a supernatant collection cylinder are sequentially arranged behind the wastewater collection pool, and a circulation pipe I circulating to the wastewater collection pool is arranged on the supernatant collection cylinder; an electroplating sewage processor is arranged behind the sedimentation tank.

The electroplating sewage treatment device comprises a tank body, wherein a conical partition plate is arranged between the side wall and the bottom of the lower part of the tank body, the side wall and the bottom of the lower part of the tank body form a closed sludge concentration chamber by the partition plate, a sludge discharge pipe is arranged at the bottom of the sludge concentration chamber, and a circulating pipe II connected to an inner cavity of the tank body is arranged at the upper part of the sludge concentration chamber; a sludge receiving device is arranged at the center of the middle upper part of the tank body, and a sludge conduit is arranged between the sludge receiving device and the sludge concentration chamber; the lower end and the upper end of the tank body are respectively provided with a sewage inlet pipe and a clear liquid outlet pipe which are communicated with the tank body.

The sludge receiving device is a receiving barrel communicated with the sludge guide pipe.

The sludge discharging pipe is connected to a sludge tank, a sludge pump is arranged on the sludge tank, the sludge pump is connected with a mechanical dehydration device, and a circulating pipe III connected to a waste water collecting tank is arranged on the mechanical dehydration device.

Compared with the prior art, the electroplating wastewater treatment system comprises a wastewater collection pool, a pH adjusting pool I, a demulsification device, a pH adjusting pool II, a Fenton advanced oxidation device, a pH adjusting pool coagulation pool III, a flocculation pool, a sedimentation pool and a supernatant collection cylinder are sequentially arranged behind the wastewater collection pool, and a circulating pipe I circulating to the wastewater collection pool is arranged on the supernatant collection cylinder; an electroplating sewage processor is arranged behind the sedimentation tank; the structure replaces the original biochemical treatment by the electroplating wastewater tail end system, reduces the debugging time and unnecessary medicament investment, saves the subsequent subsidiary sludge treatment cost caused by the biochemical treatment, has better competitiveness under the condition of limited places because the required area of the equipment is smaller than that of the original biochemical treatment equipment, and can also utilize a plurality of sets of electroplating wastewater rear end treatment systems to be connected in parallel to achieve the effect of increasing the treatment capacity when the water quantity is larger.

The electroplating sewage treatment device comprises a tank body, wherein a conical partition plate is arranged between the side wall and the bottom of the lower part of the tank body, the side wall and the bottom of the lower part of the tank body form a closed sludge concentration chamber by the partition plate, a sludge discharge pipe is arranged at the bottom of the sludge concentration chamber, and a circulating pipe II connected to an inner cavity of the tank body is arranged at the upper part of the sludge concentration chamber; a sludge receiving device is arranged at the center of the middle upper part of the tank body, and a sludge conduit is arranged between the sludge receiving device and the sludge concentration chamber; the lower extreme and the upper end at the jar body are equipped with respectively and go into pipe and clear liquid exit tube with jar sewage of body intercommunication, and such structure, its working process and theory of operation are: the working process and the working principle of the structure are as follows: according to the actual condition of the floccule formed by coagulation, the hydrodynamic data in the electroplating sewage processor is accurately determined, so that a very compact suspended mud layer with the thickness of dozens of centimeters is formed at the middle upper part of the tank body; all the coagulated effluent must be filtered by the suspended mud layer, and then the effluent can flow up to a clear water collecting area at the upper part of the tank body; it successfully plays an extremely important role in filtering in the advanced sewage treatment process; the compact suspended sludge layer is composed of flocs formed by sludge in sewage and coagulating agent, and the lower surface layer of the sludge layer is continuously increased and thickened along with the movement of the flocs from bottom to top; meanwhile, the upper surface layer of the suspended sludge layer is guided to continuously flow into the sludge receiving device along with the bypass flow of the tank body formed by the filtering hydrodynamics principle, and the upper surface layer is continuously reduced and thinned; thus, the thickness of the suspended mud layer reaches a dynamic balance; when the coagulated effluent passes through the suspended sludge layer from bottom to top, the floc filtering layer intercepts all impurities such as suspended colloid particles, flocs, bacteria and the like on the suspended sludge layer by virtue of interface physical adsorption, electrochemical characteristics and van der Waals force action, so that the effluent quality reaches the level of three-stage treatment; the mud layer is composed of flocs, so that the density is high, and the filtering efficiency is far higher than that of the conventional sand layer; because the floc mud layer in a suspension state is used as a filter layer, the loss of the filtered water head (resistance) is very small, so the power consumption is far lower than that of the conventional sand layer filtration, microporous filtration or reverse osmosis membrane filtration; the filter mud layer is automatically supplemented and added by the sludge in the sewage in the purification process and automatically led away, namely the filter mud layer is continuously updated, the filter mud layer always keeps stable thickness and stable physical adsorption and electrochemical adsorption performances, so that stable filtration effect can be obtained.

The sludge calandria is connected to a sludge tank, a sludge pump is arranged on the sludge tank, the sludge pump is connected with a mechanical dehydration device, and a circulating pipe III connected to a wastewater collecting tank is arranged on the mechanical dehydration device; the sludge is highly concentrated in the concentrating chamber and is discharged periodically by pressure, and because the sludge has low water content and good dehydration performance, the sludge can be directly sent into a mechanical dehydration device, and the sludge cake after dehydration can also be used for manufacturing sidewalk floor tiles, thereby avoiding secondary pollution.

Drawings

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, in which:

fig. 1 is a schematic view of the connection structure of the present invention.

FIG. 2 is a schematic view of the connection structure of the electroplating sewage treatment device of the present invention.

Wherein, the wastewater collecting tank 1; a pH adjusting tank I2; a demulsifying device 3; a pH adjusting tank II 4; a Fenton advanced oxidation unit 5; a flocculation tank 6; a sedimentation tank 7; a supernatant collecting cylinder 8; an electroplating sewage processor 9; a tank 901; a partition 902; a sludge concentration chamber 903; a sludge drain pipe 904; a circulation pipe II 905; a sludge receiving device 906; a sludge conduit 907; a sewage inlet pipe 908; a clear liquid outlet pipe 909; a sludge tank 10; a mechanical dewatering device 11.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present invention.

Embodiment 1. as shown in fig. 1, an electroplating wastewater treatment system comprises a wastewater collection tank 1, a pH adjusting tank i 2, a demulsification device 3, a pH adjusting tank ii 4, a fenton advanced oxidation device 5, a pH adjusting tank coagulation tank iii, a flocculation tank 6, a sedimentation tank 7 and a supernatant collection cylinder 8 are sequentially arranged behind the wastewater collection tank 1, and a circulation pipe i circulating to the wastewater collection tank 1 is arranged on the supernatant collection cylinder 8; an electroplating sewage processor 9 is arranged behind the sedimentation tank 7.

The electroplating sewage treatment device 9 comprises a tank body 901, a conical partition 902 is arranged between the lower side wall and the bottom of the tank body 901, the partition 902 enables the lower side wall and the bottom of the tank body 901 to form a closed sludge concentration chamber 903, a sludge discharge pipe 904 is arranged at the bottom of the sludge concentration chamber 903, and a circulating pipe II 905 connected to the inner cavity of the tank body 901 is arranged at the upper part of the sludge concentration chamber 903; a sludge receiving device 906 is arranged at the center of the middle upper part of the tank 901, and a sludge conduit 907 is arranged between the sludge receiving device 906 and the sludge concentrating chamber 903; a sewage inlet pipe 908 and a clear liquid outlet pipe 909 which are communicated with the tank 901 are respectively arranged at the lower end and the upper end of the tank 901; the sludge receiving device 906 is a receiving barrel communicated with a sludge conduit 907.

The sludge discharging pipe 904 is connected to a sludge tank 10, a sludge pump is arranged on the sludge tank 10, the sludge pump is connected with a mechanical dehydration device 11, and a circulating pipe III connected to a waste water collecting tank 1 is arranged on the mechanical dehydration device 11.

The working process and the working principle of the structure are as follows: according to the actual condition of the flocculated mass formed by coagulation, the hydrodynamic data in the electroplating sewage treatment device 9 is accurately determined, so that a very compact suspended sludge layer with the thickness of tens of centimeters is formed at the middle upper part of the tank 901; all the coagulated effluent must be filtered by the suspended sludge layer to flow up to the clear water collecting area on the upper part of the tank 901; it successfully plays an extremely important role in filtering in the advanced sewage treatment process; the compact suspended sludge layer is composed of flocs formed by sludge in sewage and coagulating agent, and the lower surface layer of the sludge layer is continuously increased and thickened along with the movement of the flocs from bottom to top; meanwhile, as the bypass of the tank 901 formed by the filter hydrodynamics principle flows, the upper layer of the suspended sludge layer is guided to continuously flow into the sludge receiving device 906, and the upper layer is continuously reduced and thinned; in this way, the thickness of the suspended sludge layer reaches a dynamic equilibrium.

When the coagulated effluent passes through the suspended sludge layer from bottom to top, the floc filtering layer intercepts all impurities such as suspended colloid particles, flocs, bacteria and the like on the suspended sludge layer by virtue of interface physical adsorption, electrochemical characteristics and van der Waals force action, so that the effluent quality reaches the level of three-stage treatment; the mud layer is composed of flocs, so that the density is high, and the filtering efficiency is far higher than that of the conventional sand layer; because the floc mud layer in a suspension state is used as a filter layer, the loss of the filtered water head (resistance) is very small, so the power consumption is far lower than that of the conventional sand layer filtration, microporous filtration or reverse osmosis membrane filtration; the filter mud layer is automatically supplemented and added by the sludge in the sewage in the purification process and automatically led away, namely the filter mud layer is continuously updated, the filter mud layer always keeps stable thickness and stable physical adsorption and electrochemical adsorption performances, so that stable filtration effect can be obtained.

The system firstly adopts a chemical method to separate out the pollutants in a dissolved state from a true solution state to form colloidal particles or micro suspended particles with a solid phase interface; separating organic pollutants, chromaticity and the like from the sewage by selecting an efficient and economic adsorbent; then, various colloidal particles and suspended particles in the sewage are agglomerated into massive and compact flocs by adopting a microscopic physical adsorption method; then, by means of fluid mechanics principles such as rotational flow, filtering hydraulics and the like, flocs and water are quickly separated in the SPR high-turbidity sewage purifier; clear water is filtered by a compact suspended mud layer formed in the tank 901, so that the level of three-stage treatment is achieved, and the effluent is recycled; the sludge is highly concentrated in the sludge concentration chamber 903 and is discharged at regular intervals by pressure, the sludge can be directly sent into a mechanical dehydration device due to low water content and good dehydration performance, and the sludge cake after dehydration can also be used for manufacturing pavement floor tiles, so that secondary pollution is avoided.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. An electroplating wastewater treatment system comprises a wastewater collection pool (1), wherein a pH adjusting pool I (2), a demulsification device (3), a pH adjusting pool II (4), a Fenton advanced oxidation device (5), a pH adjusting pool coagulation pool III, a flocculation pool (6), a sedimentation pool (7) and a supernatant collecting cylinder (8) are sequentially arranged behind the wastewater collection pool (1), and a circulating pipe I circulating to the wastewater collection pool (1) is arranged on the supernatant collecting cylinder (8); the method is characterized in that: an electroplating sewage processor (9) is arranged behind the sedimentation tank (7).

2. The electroplating wastewater treatment system according to claim 1, wherein: the electroplating sewage treatment device (9) comprises a tank body (901), a conical partition plate (902) is arranged between the side wall and the bottom of the lower part of the tank body (901), the side wall and the bottom of the lower part of the tank body (901) form a closed sludge concentration chamber (903) by the partition plate (902), a sludge discharge pipe (904) is arranged at the bottom of the sludge concentration chamber (903), and a circulating pipe II (905) connected to the inner cavity of the tank body (901) is arranged at the upper part of the sludge concentration chamber (903); a sludge receiving device (906) is arranged at the center of the middle upper part of the tank body (901), and a sludge conduit (907) is arranged between the sludge receiving device (906) and the sludge concentration chamber (903); a sewage inlet pipe (908) and a clear liquid outlet pipe (909) which are communicated with the tank body (901) are respectively arranged at the lower end and the upper end of the tank body (901).

3. The electroplating wastewater treatment system according to claim 2, wherein: the sludge receiving device (906) is a receiving barrel communicated with a sludge conduit (907).

4. The electroplating wastewater treatment system according to claim 2, wherein: the sludge discharging pipe (904) is connected to a sludge tank (10), a sludge pump is arranged on the sludge tank (10), the sludge pump is connected with a mechanical dehydration device (11), and a circulating pipe III connected to a waste water collecting tank (1) is arranged on the mechanical dehydration device (11).