CN109095668B - Micro-electrolysis and combined electrophoresis wastewater pretreatment process comprising sludge-water separation step - Google Patents
Micro-electrolysis and combined electrophoresis wastewater pretreatment process comprising sludge-water separation step Download PDFInfo
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Abstract
本发明公开了一种包括泥水分离步骤的微电解及其组合预处理电泳废水的工艺，包括废水汇集步骤、废水处理步骤、泥水分离步骤、上清液过滤步骤和污泥处理步骤，在废水处理过程中加入pH值调节剂、阻垢剂、絮凝剂和缓蚀剂等药剂，通过废水调节池、反应水池、中间水池等将电泳涂装产生的废水进行清化无毒处理，并实现水泥分离，避免电泳涂装产生的直接外排造成的水资源污染。本发明通过水处理控制装置的设置，系统自动化程度高，基本实现无人值守，节省了人工费用。
The invention discloses a micro-electrolysis including a mud-water separation step and a combined process for pre-treating electrophoresis wastewater. During the process, pH regulators, scale inhibitors, flocculants and corrosion inhibitors are added, and the wastewater produced by electrophoretic coating is cleaned and non-toxic through wastewater conditioning pools, reaction pools, intermediate pools, etc., and cement separation is achieved. Avoid water pollution caused by direct efflux caused by electrophoretic coating. Through the setting of the water treatment control device, the present invention has a high degree of system automation, basically realizes unattended operation, and saves labor costs.
Description
The patent application of the invention is divisional application of a parent application with the patent application number of 201711326142.7, the applicant name of 'Xiangyang Guangyui automobile parts Limited' and the invention name of 'process for pretreating electrophoretic wastewater by micro-electrolysis and combination thereof', and the application date of the parent application is 12 and 13 in 2017.
Technical Field
The invention relates to the technical field of electrophoretic wastewater treatment, in particular to a process for pretreating electrophoretic wastewater by micro-electrolysis and combination thereof, wherein the process comprises a mud-water separation step.
Background
The electrophoretic coating is a special coating forming method developed in 30 years, has the characteristics of water solubility, no toxicity, easiness in automatic control and the like, and is widely applied to industries such as automobiles, electronics, building materials, hardware and the like. Therefore, the electrophoretic wastewater is generated and becomes a widely-appearing industrial wastewater which has the characteristics of multiple pollutant types and complex components.
In addition, because the scale difference of various industries and enterprises is large, the difference of the water quantity and the water quality of the electrophoresis wastewater is also large, and the treatment process of the electrophoresis wastewater is also necessarily diversified. The wastewater treatment station must be designed, constructed and put into operation simultaneously with a new production line, so that accurate wastewater quality cannot be obtained in a field sampling mode, and the raw water quality of the electrophoretic coating wastewater treatment project is determined by the enterprise by combining with the water quality data of the same industry. However, the existing electrophoretic coating wastewater treatment project has large occupied area, unreasonable arrangement of each reaction tank and unstable wastewater treatment effect.
Disclosure of Invention
The invention aims to solve the technical problem of providing a process for pretreating electrophoretic wastewater by microelectrolysis and combination thereof, which has stable wastewater treatment effect and is unattended.
In order to solve the technical problems, the technical scheme of the invention is as follows: the process for pretreating electrophoretic wastewater by microelectrolysis and the combination thereof comprises the following steps,
step one, collecting waste water
A wastewater adjusting tank is arranged for collecting electrophoretic wastewater, an aeration device for preventing wastewater from generating precipitates is installed on the wastewater adjusting tank, the air outlet end of the aeration device is arranged at the bottom end in the wastewater adjusting tank, and the aeration intensity of the aeration device is not less than 5m3A standby water pool is arranged on one side of the wastewater regulating pool, and a standby electromagnetic valve and a standby water pump are arranged on a pipeline between the wastewater regulating pool and the standby water pool;
step two, wastewater treatment
Setting a reaction water tank, wherein the reaction water tank is communicated with the wastewater adjusting tank through a water pumping device, an aeration device, a mud scraping device, a micro-electrolysis device and a stirring device are correspondingly installed in the reaction water tank, the reaction water tank is connected with a dosing device, a pH value detection probe is installed in the reaction water tank, the signal output end of the pH value detection probe is connected to a water treatment control device, the control end of the water treatment control device is connected to the dosing device, firstly, the dosing device adds a pH value regulator into the reaction water tank and starts the stirring device, when the pH value of wastewater is adjusted to 3.5, the pH value regulator is stopped to be added, in the pH value adjusting stage, the stirring speed of the stirring device is not lower than 180r/min, and then, a scale inhibitor, a flocculating agent and a corrosion inhibitor are added through the dosing device simultaneously, the stirring speed of the stirring device is not lower than 260r/min while the medicament is added, the reaction time of the wastewater in the reaction water tank is not less than 5h after the medicament is added, the stirring is stopped after the reaction is finished, the wastewater is kept stand for not less than 5h, and the wastewater is electrolyzed in the reaction water tank by the micro-electrolysis device in the whole process;
step three, mud-water separation
Arranging a sludge pool and a middle pool on one side of the reaction pool, arranging guide grooves at the top end of the reaction pool and the top end of the sludge pool, communicating the bottom end of the reaction pool and the bottom end of the sludge pool with a sludge discharge pipe, mounting a sludge discharge electromagnetic valve and a sludge discharge pump on the sludge discharge pipe, scraping flocculates on the surface of the reaction pool into the sludge pool through the guide grooves by using the sludge scraping device, pumping supernatant in the reaction pool into the middle pool, starting the sludge discharge electromagnetic valve and the sludge discharge pump by using the water treatment control device, and discharging sludge precipitated at the bottom end of the reaction pool into the sludge pool;
step four, filtering the supernatant
The water treatment control device is characterized in that a quartz sand filter layer is arranged in the middle water tank, a drain pipe is arranged on the middle water tank below the quartz sand filter layer and communicated with a clean water tank, the clean water tank is connected to the standby water tank through a clean water pipeline, a clean water electromagnetic valve and a clean water pump are mounted on the clean water pipeline, a water quality detection probe is arranged in the clean water tank and connected to the water treatment control device, when the water quality detection probe detects that the water quality is qualified, the water treatment control device automatically discharges the water in the clean water tank, and when the water quality detection probe detects that the water quality is unqualified, the water treatment control device controls the clean water electromagnetic valve and the clean water pump to be opened, so that the water enters the standby water tank for secondary treatment;
step five, sludge treatment
And a sludge water filtering device is arranged in the sludge tank to separate water in the sludge, so that the sludge is discharged and conveyed after being dried.
According to a preferable technical scheme, the dosing device comprises four medicament tanks which are arranged in parallel, the pH value regulator, the scale inhibitor, the flocculating agent and the corrosion inhibitor are respectively arranged in the corresponding medicament tanks, each medicament tank is respectively connected to the reaction water tank through a pipeline, flow electromagnetic valves are correspondingly arranged on the pipelines respectively, and each flow electromagnetic valve is connected to the water treatment control device.
As a preferable technical scheme, the pH value regulator is set to be sulfuric acid solution with the concentration of 10%.
As a preferred technical scheme, the scale inhibitor comprises the following components in parts by weight:
10-15 parts of diethylenetriaminepentaacetic acid, 20-25 parts of dodecyl dimethyl benzyl ammonium chloride, 10-15 parts of potassium borohydride, 12-20 parts of maleic acid-acrylic acid copolymer and 8-12 parts of sodium polyacrylate.
As a preferable technical scheme, the flocculant comprises the following components in parts by weight:
3-4 parts of nano silicon dioxide, 0.1-0.2 part of ethylenediamine, 3-6 parts of chitosan, 8-12 parts of dioctyl phthalate, 0.3-0.6 part of inorganic aluminum salt and 0.5-0.8 part of inorganic iron salt.
As a preferred technical scheme, the corrosion inhibitor comprises the following components in parts by weight:
12-18 parts of sodium tungstate, 5-9 parts of ethanol, 4-9 parts of monoethanolamine, 20-35 parts of ammonium citrate and 230-300 parts of water.
As a preferred technical scheme, the water treatment control device comprises a microprocessor, wherein the microprocessor is connected with a display, a memory, a hard disk and a system bus, and is also connected with a communication interface.
As a preferable technical scheme, the communication interface is set to be a wired communication interface or a wireless communication interface based on GPRS, EDGE, WLAN, Wi-Fi, 3G and 4G technologies.
According to a preferable technical scheme, the aeration device comprises an aeration pump, an air outlet end of the aeration pump is connected with an aeration vertical pipe, the bottom end of the aeration vertical pipe is connected with an aeration outer ring pipe, and a plurality of aeration inner ring pipes with gradually-reduced diameters are connected to one side in the aeration outer ring pipe in a sleeved mode.
Due to the adoption of the technical scheme, the invention has the beneficial effects that: through waste water equalizing basin, reaction water pond, middle pond etc. the waste water that produces the electrophoretic coating innoxious processing of clearing up to realize the cement separation, avoid the direct outer water resource pollution that causes of arranging of electrophoretic coating production, in addition through water treatment controlling means's setting, system degree of automation is high, realizes unmanned on duty basically, has saved the labour cost.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of a part of the structure of an aeration apparatus according to an embodiment of the present invention;
in the figure: 1-an aeration vertical pipe; 2-aeration outer ring pipe; 3-aerating the inner circular pipe.
Detailed Description
The invention is further illustrated below with reference to the figures and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
As shown in fig. 1 and 2, the process for pretreating electrophoretic wastewater by microelectrolysis and a combination thereof comprises the following steps,
step one, collecting waste water
A wastewater adjusting tank is arranged for collecting electrophoretic wastewater, an aeration device for preventing wastewater from generating precipitates is installed on the wastewater adjusting tank, the air outlet end of the aeration device is arranged at the bottom end in the wastewater adjusting tank, and the aeration intensity of the aeration device is not less than 5m3And (i)/((square meter. h)), one side of the wastewater regulating pool is provided with a standby water pool, and a standby electromagnetic valve and a standby water pump are arranged on a pipeline between the wastewater regulating pool and the standby water pool. The standby water pool is in system fault or terminal waterAnd the detection is used when the detection is unqualified. The aeration device comprises an aeration pump, an air outlet end of the aeration pump is connected with an aeration vertical pipe 1, the bottom end of the aeration vertical pipe 1 is connected with an aeration outer circular pipe 2, one side of the inside of the aeration outer circular pipe 2 is sleeved with a plurality of aeration inner circular pipes 3 with gradually reduced diameters, the aeration outer circular pipe 2 is adjacent to the aeration inner circular pipes 3, connecting arms are arranged between the aeration inner circular pipes 3 and adjacent to the aeration outer circular pipe 2, aeration holes are uniformly distributed in the aeration outer circular pipe 2 and the aeration inner circular pipes 3, the aeration positions are multiple, the arrangement is uniform, and the improvement of the aeration quality is facilitated.
Step two, wastewater treatment
Setting a reaction water tank, wherein the reaction water tank is communicated with the wastewater adjusting tank through a water pumping device, an aeration device, a mud scraping device, a micro-electrolysis device and a stirring device are correspondingly installed in the reaction water tank, the reaction water tank is connected with a dosing device, a pH value detection probe is installed in the reaction water tank, the signal output end of the pH value detection probe is connected to a water treatment control device, the control end of the water treatment control device is connected to the dosing device, firstly, the dosing device adds a pH value regulator into the reaction water tank and starts the stirring device, when the pH value of wastewater is adjusted to 3.5, the pH value regulator is stopped to be added, in the pH value adjusting stage, the stirring speed of the stirring device is not lower than 180r/min, and then, a scale inhibitor, a flocculating agent and a corrosion inhibitor are added through the dosing device simultaneously, the stirring speed of the stirring device is not lower than 260r/min while the medicament is added, the reaction time of the wastewater in the reaction water tank is not less than 5h after the medicament is added, the stirring is stopped after the reaction is finished, the wastewater is kept stand for not less than 5h, and the wastewater is electrolyzed in the reaction water tank by the micro-electrolysis device in the whole process. The detailed structure of the micro-electrolysis device is well known to those skilled in the art.
The dosing device of this embodiment is including four medicament jars that set up side by side, the pH value regulator the antisludging agent, the flocculating agent with the corrosion inhibitor is located correspondingly respectively in the medicament jar, each the medicament jar is respectively through tube coupling to the reaction water tank, and corresponds respectively on each pipeline and install the flow solenoid valve, each the flow solenoid valve all is connected to water treatment controlling means.
Wherein the pH value regulator is set to be sulfuric acid solution with the concentration of 10%. The scale inhibitor comprises the following components in parts by weight: 10-15 parts of diethylenetriaminepentaacetic acid, 20-25 parts of dodecyl dimethyl benzyl ammonium chloride, 10-15 parts of potassium borohydride, 12-20 parts of maleic acid-acrylic acid copolymer and 8-12 parts of sodium polyacrylate. The flocculant comprises the following components in parts by weight: 3-4 parts of nano silicon dioxide, 0.1-0.2 part of ethylenediamine, 3-6 parts of chitosan, 8-12 parts of dioctyl phthalate, 0.3-0.6 part of inorganic aluminum salt and 0.5-0.8 part of inorganic iron salt. The corrosion inhibitor comprises the following components in parts by weight: 12-18 parts of sodium tungstate, 5-9 parts of ethanol, 4-9 parts of monoethanolamine, 20-35 parts of ammonium citrate and 230-300 parts of water.
As a preferred technical scheme, the scale inhibitor comprises the following components in parts by weight: 12 parts of diethylenetriaminepentaacetic acid, 22 parts of dodecyl dimethyl benzyl ammonium chloride, 13 parts of potassium borohydride, 16 parts of maleic acid-acrylic acid copolymer and 9 parts of sodium polyacrylate. The flocculant comprises the following components in parts by weight: 3.5 parts of nano silicon dioxide, 0.15 part of ethylenediamine, 4 parts of chitosan, 10 parts of dioctyl phthalate, 0.5 part of inorganic aluminum salt and 0.6 part of inorganic iron salt. The corrosion inhibitor comprises the following components in parts by weight: 16 parts of sodium tungstate, 7 parts of ethanol, 6 parts of monoethanolamine, 28 parts of ammonium citrate and 280 parts of water.
Step three, mud-water separation
Arranging a sludge pool and a middle pool on one side of the reaction pool, arranging guide grooves at the top end of the reaction pool and the top end of the sludge pool, communicating the bottom end of the reaction pool and the bottom end of the sludge pool with a sludge discharge pipe, mounting a sludge discharge electromagnetic valve and a sludge discharge pump on the sludge discharge pipe, scraping flocculates on the surface of the reaction pool into the sludge pool through the guide grooves by using the sludge scraping device, pumping supernatant in the reaction pool into the middle pool, starting the sludge discharge electromagnetic valve and the sludge discharge pump by using the water treatment control device, and discharging sludge precipitated at the bottom end of the reaction pool into the sludge pool;
step four, filtering the supernatant
The quartz sand filter layer is arranged in the middle water tank, the drain pipe is arranged on the middle water tank below the quartz sand filter layer, the drain pipe is communicated with a clean water tank, the clean water tank is connected to the standby water tank through a clean water pipeline, a clean water electromagnetic valve and a clean water pump are installed on the clean water pipeline, a water quality detection probe is arranged in the clean water tank and is connected to the water treatment control device, when the water quality detection probe detects that the water quality is qualified, the water treatment control device automatically enables the water in the clean water tank to be discharged outwards, when the water quality detection probe detects that the water quality is unqualified, the water treatment control device controls the clean water electromagnetic valve and the clean water pump to be opened, so that the water enters the standby water tank for secondary treatment. The water treatment control device comprises a microprocessor, the microprocessor is connected with a display, a memory, a hard disk and a system bus, the microprocessor is further connected with a communication interface, and the communication interface is a wired communication interface or a wireless communication interface based on GPRS, EDGE, WLAN, Wi-Fi, 3G and 4G technologies.
Step five, sludge treatment
And a sludge water filtering device is arranged in the sludge tank to separate water in the sludge, so that the sludge is discharged and conveyed after being dried.
The waste water generated by electrophoretic coating is cleaned and subjected to non-toxic treatment through the waste water regulating tank, the reaction water tank, the intermediate water tank and the like, cement separation is realized, water resource pollution caused by direct discharge generated by electrophoretic coating is avoided, and in addition, through the arrangement of the water treatment control device, the system has high automation degree, basically realizes unattended operation, and saves labor cost.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A process for pretreating electrophoretic wastewater by micro-electrolysis and combination thereof, which comprises a mud-water separation step, is characterized in that: the process comprises a wastewater collection step, a wastewater treatment step, a mud-water separation step, a supernatant filtering step and a sludge treatment step, wherein the process is used for carrying out cleaning and non-toxic treatment on the wastewater generated by electrophoretic coating through a wastewater adjusting tank, a reaction water tank and an intermediate water tank, and realizing cement separation, so that water resource pollution caused by direct discharge generated by electrophoretic coating is avoided; wherein the wastewater collection step is: a wastewater adjusting tank is arranged for collecting electrophoretic wastewater, an aeration device for preventing wastewater from generating precipitates is installed on the wastewater adjusting tank, the air outlet end of the aeration device is arranged at the bottom end in the wastewater adjusting tank, and the aeration intensity of the aeration device is not less than 5m3A standby water pool is arranged on one side of the wastewater regulating pool, and a standby electromagnetic valve and a standby water pump are arranged on a pipeline between the wastewater regulating pool and the standby water pool;
wherein the wastewater treatment steps are as follows: setting a reaction water tank, wherein the reaction water tank is communicated with the wastewater adjusting tank through a water pumping device, an aeration device, a mud scraping device, a micro-electrolysis device and a stirring device are correspondingly installed in the reaction water tank, the reaction water tank is connected with a dosing device, a pH value detection probe is installed in the reaction water tank, the signal output end of the pH value detection probe is connected to a water treatment control device, the control end of the water treatment control device is connected to the dosing device, firstly, the dosing device adds a pH value regulator into the reaction water tank and starts the stirring device, when the pH value of wastewater is adjusted to 3.5, the pH value regulator is stopped to be added, in the pH value adjusting stage, the stirring speed of the stirring device is not lower than 180r/min, and then, a scale inhibitor, a flocculating agent and a corrosion inhibitor are added through the dosing device simultaneously, the stirring speed of the stirring device is not lower than 260r/min while the medicament is added, the reaction time of the wastewater in the reaction water tank is not less than 5h after the medicament is added, the stirring is stopped after the reaction is finished, the wastewater is kept stand for not less than 5h, and the wastewater is electrolyzed in the reaction water tank by the micro-electrolysis device in the whole process;
the mud-water separation step is as follows: arranging a sludge pool and a middle pool on one side of a reaction pool, arranging guide grooves at the top end of the reaction pool and the top end of the sludge pool, communicating the bottom end of the reaction pool and the bottom end of the sludge pool with a sludge discharge pipe, mounting a sludge discharge electromagnetic valve and a sludge discharge pump on the sludge discharge pipe, scraping flocculate on the surface of the reaction pool into the sludge pool through the guide grooves by using a sludge scraping device, pumping supernatant in the reaction pool into the middle pool, starting the sludge discharge electromagnetic valve and the sludge discharge pump by using a water treatment control device, and discharging sludge precipitated at the bottom end of the reaction pool into the sludge pool;
the scale inhibitor comprises the following components in parts by weight: 10-15 parts of diethylenetriaminepentaacetic acid, 20-25 parts of dodecyl dimethyl benzyl ammonium chloride, 10-15 parts of potassium borohydride, 12-20 parts of maleic acid-acrylic acid copolymer and 8-12 parts of sodium polyacrylate.
2. The process for the pre-treatment of electrophoretic wastewater by microelectrolysis and combinations thereof including a step of separating sludge from water according to claim 1, wherein: the aeration device comprises an aeration pump, an air outlet end of the aeration pump is connected with an aeration vertical pipe, the bottom end of the aeration vertical pipe is communicated with an aeration outer ring pipe, and one side in the aeration outer ring pipe is connected with a plurality of aeration inner ring pipes with gradually-reduced diameters in a sleeved mode.
3. The process for the pre-treatment of electrophoretic wastewater by microelectrolysis and combinations thereof including a step of separating sludge from water according to claim 2, wherein: and connecting arms are arranged between the adjacent outer aeration circular pipes and the adjacent inner aeration circular pipes and between the adjacent inner aeration circular pipes, and aeration holes are uniformly distributed on the outer aeration circular pipes and the inner aeration circular pipes.
4. The process for the pre-treatment of electrophoretic wastewater by microelectrolysis and combinations thereof including a step of separating sludge from water according to claim 2, wherein: the chemical adding device comprises four chemical tanks which are arranged in parallel, the pH value regulator, the scale inhibitor, the flocculating agent and the corrosion inhibitor are respectively arranged in the corresponding chemical tanks, each chemical tank is respectively connected to the reaction water tank through a pipeline, flow electromagnetic valves are correspondingly arranged on each pipeline respectively, and each flow electromagnetic valve is connected to the water treatment control device.
5. The process for the pre-treatment of electrophoretic wastewater by microelectrolysis and combinations thereof including a step of separating sludge from water according to claim 2, wherein: the flocculant comprises the following components in parts by weight: 3-4 parts of nano silicon dioxide, 0.1-0.2 part of ethylenediamine, 3-6 parts of chitosan, 8-12 parts of dioctyl phthalate, 0.3-0.6 part of inorganic aluminum salt and 0.5-0.8 part of inorganic iron salt.
6. The process for the pre-treatment of electrophoretic wastewater by microelectrolysis and combinations thereof including a step of separating sludge from water according to claim 4, wherein: the corrosion inhibitor comprises the following components in parts by weight: 12-18 parts of sodium tungstate, 5-9 parts of ethanol, 4-9 parts of monoethanolamine, 20-35 parts of ammonium citrate and 230-300 parts of water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811177423.5A CN109095668B (en) | 2017-12-13 | 2017-12-13 | Micro-electrolysis and combined electrophoresis wastewater pretreatment process comprising sludge-water separation step |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711326142.7A CN108046485B (en) | 2017-12-13 | 2017-12-13 | Process for pretreatment of electrophoresis wastewater by micro-electrolysis and its combination |
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| CN108046485B (en) | 2019-02-12 |
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