CN116354483A - Industrial wastewater treatment system and method - Google Patents
Industrial wastewater treatment system and method Download PDFInfo
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- CN116354483A CN116354483A CN202310071863.7A CN202310071863A CN116354483A CN 116354483 A CN116354483 A CN 116354483A CN 202310071863 A CN202310071863 A CN 202310071863A CN 116354483 A CN116354483 A CN 116354483A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The application provides an industrial wastewater treatment system and method, comprising a medicament storage device configured to be filled with a medicament configured to neutralize a ph of wastewater; the wastewater conveying device is configured to facilitate water flow on-off between the wastewater output device and the wastewater treatment device and monitor parameters of the conveyed wastewater; a wastewater treatment device which is respectively communicated with the medicament storage device and the wastewater conveying device so as to mix the wastewater conveyed from the wastewater conveying device with the medicament conveyed from the medicament storage device; and the control device is respectively and electrically connected with the medicament storage device, the wastewater conveying device and the wastewater treatment device, and controls the dosage of the medicament entering the wastewater treatment device based on the monitored parameters of the wastewater. The system provided by the invention is widely suitable for accurately controlling the pH value of wastewater in the fields of mineral separation, smelting, electrophoretic coating, printing and dyeing, electroplating, chemical raw material production and the like.
Description
Technical Field
The application relates to the technical field of wastewater treatment, in particular to an industrial wastewater treatment system and method.
Background
The industrial wastewater has complex components and is usually acidic or alkaline, for example, the pH value of the wastewater in an electroplating plant ranges from 1 to 3, and the direct discharge can cause water pollution. National industry emission standards such as pollutant emission standards of urban sewage treatment plants (GB 18918-2002), comprehensive sewage emission standards (GB 8978-1996), steel industry water pollutant emission standards (GB 13456-2012), rare earth industry pollutant emission standard limit values (GB 26451-2011) clearly specify that the pH range of wastewater emission indexes is 6-9, so that acid-base neutralization treatment is necessary for wastewater.
The pH value is regulated as an important link in the wastewater treatment process, and an adjusting tank matched stirring system is usually adopted for wastewater treatment at present, so that the occupied area is large; the corrosion of mechanical stirring equipment is easy to cause under acid-base environment, and the maintenance cost of the equipment is increased; the mixing efficiency of part of the mechanical stirring system on the wastewater and the medicament is low; the fluctuation of the industrial wastewater quantity is large, the traditional pH adjusting system is difficult to adjust the adding quantity of acid and alkali in time, and the pH value cannot be accurately controlled.
Related researchers are used for solving the problems in the wastewater treatment link, for example, a wastewater pH adjusting device is proposed by people for enhancing the mixing degree of wastewater and an acid-base solution, but the wastewater pH adjusting device cannot acquire the liquid inlet amount of wastewater, and only the acid-base solution can be added according to the experience of technicians, so that the pH value of the wastewater is difficult to accurately adjust. Still another proposed industrial wastewater pH adjusting system is that wastewater and acid/alkali agents enter a mixing tank together through a mixer, the mixing tank is communicated with a rear-end reaction tank through an overflow hole of a middle boundary wall, the pH value of effluent is monitored to adjust the acid-base consumption and the water supply quantity, but the floor space is still large, many factories cannot meet the construction conditions, if the pH value of the wastewater does not reach the target value, the wastewater can only be discharged from a water outlet, the wastewater cannot be continuously adjusted, and the continuous and stable pH value of the wastewater cannot be ensured to reach the standard. According to the method for regulating the pH value of the wastewater, the wastewater and the acid/alkali medicament are pumped into a mixer together for neutralization, the rear end of the mixer displays the pH value of the mixed wastewater, if the pH value of the wastewater does not reach the target pH value, the wastewater flows back to a wastewater tank for readjusting the pH value, but the mixer is small in size, the neutralization reaction time is short, the wastewater and the acid/alkali medicament cannot be fully and uniformly mixed, the pH value is unstable, the whole system does not mention linkage control, and the dosage and the wastewater backflow are difficult to accurately and quickly regulate the pH value to reach the target value under manual control; if the target pH value is not reached, the wastewater needs to be refluxed but cannot flow to the rear-end treatment process, so that the continuous operation of the whole wastewater treatment process is affected.
Thus, there are still a number of problems that remain in the pH adjustment stage of wastewater treatment processes that are not overcome, and there are significant challenges to each large plant.
Disclosure of Invention
In order to solve the problems, the first aspect of the invention provides an industrial wastewater treatment system which can be used as an overground integrated skid-mounted device, has high mixing efficiency, high control precision, simple operation, space saving and flexible configuration, and is widely applicable to pH value control of wastewater in the fields of mineral dressing and smelting, electrophoretic coating, printing and dyeing, electroplating, chemical raw material production and the like.
The technical scheme of the invention is as follows:
an industrial wastewater treatment system, comprising:
a medicament storage device configured to be loaded with a medicament configured to neutralize a ph of the wastewater;
a wastewater conveying device configured to facilitate water flow on-off between the wastewater output device and the wastewater treatment device and to perform parameter monitoring on the wastewater conveyed;
a wastewater treatment device which communicates with the chemical storage device and the wastewater transport device, respectively, to mix the wastewater transported from the wastewater transport device and the chemical transported from the chemical storage device;
wherein the system further comprises:
and the control device is respectively and electrically connected with the medicament storage device, the wastewater conveying device and the wastewater treatment device, and controls the dosage of the medicament entering the wastewater treatment device based on the monitored parameters of the wastewater.
As one of preferable aspects, the medicament storage device includes:
a drug storage canister containing a medicament therein;
a metering pump connected with the medicine storage tank and used for pumping the medicine to the wastewater treatment device in a set dosage;
the first electromagnetic valve is arranged on a pipeline which is communicated with the medicine storage tank and the wastewater treatment device so as to control the on-off of the medicine.
As one of preferable aspects, the wastewater transport apparatus includes:
a water inlet pump for pumping the wastewater to the wastewater treatment device;
the second electromagnetic valve is arranged on a pipeline which is communicated with the wastewater output device and the wastewater treatment device so as to control the on-off of the water flow;
and the flowmeter is positioned between the second electromagnetic valve and the water inlet pump so as to monitor the flow of the wastewater entering the wastewater treatment device.
As one of preferable aspects, the wastewater treatment apparatus includes:
a primary mixer in communication with the outlet of the medicament storage device and the outlet of the wastewater delivery device, respectively, to at least primary mix the medicament and the wastewater;
the inlet of the circulating pump is communicated with the outlet of the primary mixer, and the outlet of the circulating pump is respectively communicated with the inlet of the primary mixer and the wastewater collection device;
and the third electromagnetic valve is arranged on a pipeline which is communicated with the circulating pump and the primary mixer so as to control the on-off of the mixed liquid.
As one of preferable aspects, the wastewater treatment apparatus further includes:
the secondary mixer is arranged between the primary mixer and the medicament storage device as well as between the medicament storage device and the wastewater conveying device, so that mixed liquid of the medicament and the wastewater flows into the primary mixer for re-mixing after being mixed by the secondary mixer; or alternatively, the process may be performed,
the secondary mixer is arranged between the inlet of the primary mixer and the outlet of the circulating pump, so that the mixed liquid of the medicament and the wastewater flows into the secondary mixer for mixing again after being mixed by the primary mixer.
As one of preferable aspects, the wastewater treatment apparatus further includes:
the acid-base indicator is arranged on the primary mixer to monitor the pH value of the mixed liquid in the primary mixer;
the liquid level meter is arranged on the primary mixer to monitor the liquid level value of the mixed liquid in the primary mixer.
As one of the preferred aspects, the primary mixer and the secondary mixer have a receiving chamber configured to receive a mixed liquid, wherein the receiving chamber of the primary mixer is different in size from the receiving chamber of the secondary mixer.
As one of preferable aspects, two medicament storage devices are configured, and the medicaments contained in the corresponding medicament storage tanks in the two medicament storage devices are respectively acid liquor and alkali liquor; wherein, the liquid crystal display device comprises a liquid crystal display device,
any one of the two medicament storage devices is communicated with the wastewater treatment device.
As one of the preferred embodiments, the metering pump and the first solenoid valve in the agent storage device, the water intake pump and the second solenoid valve in the wastewater delivery device, and the circulation pump and the third solenoid valve in the wastewater treatment device are each provided with a backup group defined as the same backup pump and backup valve as the corresponding pump and valve.
Compared with the prior art, the application has the following advantages:
the invention provides an industrial wastewater treatment system, which comprises: a medicament storage device configured to be filled with a medicament configured to neutralize a ph of the wastewater; the wastewater conveying device is configured to facilitate water flow on-off between the wastewater output device and the wastewater treatment device and monitor parameters of the conveyed wastewater; a wastewater treatment device which is respectively communicated with the medicament storage device and the wastewater conveying device so as to mix the wastewater conveyed from the wastewater conveying device with the medicament conveyed from the medicament storage device; wherein the system further comprises: and the control device is respectively and electrically connected with the medicament storage device, the wastewater conveying device and the wastewater treatment device, and controls the dosage of the medicament entering the wastewater treatment device based on the monitored parameters of the wastewater.
By adopting the technical scheme of the application, there are at least the following five significant advantages:
the agent storage device, the wastewater conveying device, the wastewater treatment device and the control device are assembled to form the wastewater treatment system, so that skid-mounted equipment can be manufactured, the occupied area is greatly saved, and the use requirements of various large enterprises are met; wherein the medicament storage device provides medicaments, the medicaments comprise alkali liquor or acid liquor, the types of the medicaments are selected according to the pH value of the wastewater, and the wastewater conveying device provides wastewater with pH needing to be regulated; the chemical agent entering the wastewater treatment device and the wastewater have initial speed and pressure, and the chemical agent and the wastewater are fully mixed by opposite impact and collision and undergo acid-base neutralization reaction, so that the pH value of the wastewater is adjusted to a target value or a range capable of being directly discharged, the problem that stirring equipment is required to be relied on in the prior art is solved, the corrosion to the stirring equipment is reduced, and the maintenance cost is reduced;
the wastewater treatment device in the embodiment of the invention can carry out multistage mixing on wastewater and medicament, combines a secondary reflux process, reduces the number of treatment equipment, enhances the mixing effect of mixed liquid, has high mixing efficiency, omits the dependence of mechanical stirring equipment on one hand, improves the accuracy of pH value adjustment on the other hand, and can meet the current emission standard in China;
the control device in the embodiment of the invention can display the running state of the equipment and the related parameters of the wastewater in real time, wherein the parameters can include, but are not limited to, the initial pH value of the wastewater, the current pH value, the water quantity of the wastewater and the liquid level value of the wastewater, so that the dosage of the medicament can be automatically regulated according to the flow of the wastewater and the target pH value, the accurate and timely dosage can be realized, the pH value can be accurately and stably controlled, the automatic control is adopted, the control precision is high, the equipment can be started and stopped at fixed time according to the production requirement, and the unattended operation is realized.
The second aspect of the present invention also provides an industrial wastewater treatment method, which is applied to the industrial wastewater treatment system as described above.
The advantages of the method over the prior art are the same as those of the system described above and are not described in detail here.
In summary, the system has the advantages of complete automatic control, one object for one, and the like, can be started and stopped by button selection equipment on the electric cabinet or touch control setting, can maintain continuous operation in the whole link of the wastewater treatment process, and has good large-scale popularization and application prospect.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the description of the present application will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic view of the overall construction of an industrial wastewater treatment system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of the overall structure of an industrial wastewater treatment system according to yet another embodiment of the present application;
FIG. 3 is a schematic diagram of the overall structure of an industrial wastewater treatment system according to yet another embodiment of the present application.
Reference numerals illustrate:
1. a drug storage tank; 2. a metering pump; 3. a first electromagnetic valve; 4. a first loop; 5. a second pipeline; 6. a ball valve; 7. a water inlet pump; 8. a flow meter; 9. a second electromagnetic valve; 10. a primary mixer; 11. a liquid level gauge; 12. an acid-base indicator; 13. a circulation pump; 14. a secondary mixer; 15. a fourth pipeline; 16. a control device; 17. and a third solenoid valve.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In the related art, the adjustment of the pH value is an important link in the wastewater treatment process, and many chemical reactions in the wastewater treatment method need to be carried out under a specific pH value, for example, the Fenton oxidation method has better effect under the condition that the pH value is 5; the coagulating sedimentation method is widely applied to wastewater treatment, and the optimal pH values required by different types of coagulants are different; the refractory organic matters and toxic substances in the wastewater are usually treated by a biological treatment method, the biological treatment method has strict requirement on the pH value, the pH value of the aerobic microorganism is generally 6.5-9, and the pH value of the anaerobic microorganism is 6.8-7.2. The pH value has great significance on water treatment, and proper pH value range is selected, so that the medicament can better play a role, the treatment cost is reduced, and a better treatment effect is obtained.
The pH value of the industrial wastewater is regulated by building a pH regulating tank of an underground concrete steel structure and matching with a stirrer, so that the occupied area is large. For wastewater treatment projects, particularly transformation projects, the available area is limited, and a new underground pH adjusting tank cannot be provided for enough space to meet the process requirements. Through long-time exploration of the inventor, the pH value of the wastewater is adjusted as a ring in the treatment process, the wastewater treatment scale is huge, the treated wastewater is within a certain range, and the pH value of the wastewater can be accurately adjusted to a target value by the related technology, so that the excessive use of acid/alkali medicaments (the pH value exceeds the target value) is caused, and the cost is wasted; the too small loading of the acid/base agent (pH less than the target value) indirectly affects the subsequent process.
In view of the above, the invention aims to provide an industrial wastewater treatment system which is not only suitable for controlling the pH value of wastewater in the fields of mineral dressing and smelting, electrophoretic coating, printing and dyeing, electroplating, industrial raw material production and the like, but also suitable for meeting the requirements of a rear-end wastewater treatment process or direct discharge on the pH value.
Referring to fig. 1 to 3, fig. 1 is a schematic view showing the overall structure of an industrial wastewater treatment system according to the present invention; FIG. 2 is a schematic diagram of the overall construction of another industrial wastewater treatment system according to the present invention; FIG. 3 is a schematic view showing the overall construction of yet another industrial wastewater treatment system according to the present invention. As shown in fig. 1 to 3, the present invention provides an industrial wastewater treatment system comprising:
a medicament storage device configured to be filled with a medicament configured to neutralize a ph of the wastewater;
the wastewater conveying device is configured to facilitate water flow on-off between the wastewater output device and the wastewater treatment device and monitor parameters of the conveyed wastewater;
a wastewater treatment device which is respectively communicated with the medicament storage device and the wastewater conveying device so as to mix the wastewater conveyed from the wastewater conveying device with the medicament conveyed from the medicament storage device;
wherein the system further comprises:
and the control device 16 is electrically connected with the medicament storage device, the wastewater conveying device and the wastewater treatment device respectively, and the control device 16 controls the dosage of the medicament entering the wastewater treatment device based on the monitored parameters of the wastewater.
Specifically, the medicament storage device, the wastewater conveying device, the wastewater treatment device and the control device 16 in the embodiment of the invention are mutually matched, can be assembled and can be made into skid-mounted equipment, the installation positions of parts involved in each device are designed, the occupied area is saved, the problem that a proper address is required to be selected to excavate a pH regulating tank in the prior art is solved, and the treatment process of a small-sized factory is limited.
It will be appreciated that in this embodiment, there are also a plurality of connection line speeds, and the components (such as the solenoid valve, the metering pump 2, the water inlet pump 7, the flow meter 8, the acid-base indicator 12, etc. mentioned later) controlled by electric power in the wastewater treatment device, the wastewater delivery device, and the medicament storage device are all connected to the control device 16 through corresponding connection line speeds, so as to automatically control the working states of the corresponding electrical components. The control device 16 has a display, the signal output end and/or the signal input end of the electrical component are connected with the control device 16, the first functional electrical component is used for feeding back the detected working state of the equipment (the working state of the equipment and the working parameter of the corresponding device) to the control device 16 in the form of an electrical signal, the display converts the corresponding electrical signal into the working parameter of the corresponding electrical component, and the control device 16 controls the second functional electrical component to be in the target working state based on the working parameter. The first functional electrical component in this embodiment refers to a device that can perform the function of collecting relevant operating parameters, such as the flowmeter 8; the second functional electrical component means a device that has a function of affecting the change of the relevant operating parameter, for example, the water inlet pump 7, the frequency of the water inlet pump 7 decreases, and the flow rate of the wastewater decreases.
The control device 16 controls the opening of the solenoid valve based on the operating parameter to control the on-off of the line on which the solenoid valve is located, and for example, the control device 16 may control the pumping frequency of the metering pump 2/water intake pump 7 to control the delivery amount of the metering pump 2/water intake pump 7, etc.
In the embodiment, the type of the added medicament is determined according to the pH value of the wastewater and the target pH value, if the pH value of the wastewater is alkaline, the medicament is determined to be acid liquor, and the specific type and concentration of the alkali liquor are determined according to the specific size of the pH value; otherwise, if the pH value of the wastewater is acidic, determining the specific type and concentration of the alkali liquor. The medicament in the medicament storage device is added into the wastewater treatment device and fully mixed with the wastewater, and the dosage of the medicament can be predetermined according to the flow of the wastewater.
Relevant operating parameters include, but are not limited to, wastewater flow, mixed liquor level, current pH, target pH, initial pH. In this embodiment, when the current pH deviates from the target pH, the dosage of the chemical to be added may be calculated according to the wastewater flow rate, the current pH, and the target pH, so that the current pH of the wastewater in the wastewater treatment apparatus approaches the pH (may be accurate to decimal). Therefore, the invention is automatically controlled, the system runs on line, the working state of the equipment is displayed in real time, the dosage of the medicament can be automatically adjusted according to the parameters of the wastewater, the pH value can be accurately and stably controlled, and the invention is suitable for the accurate pH value control of the wastewater in the fields of mineral dressing, smelting, electroplating, electrophoretic coating, chemical raw material production and the like.
It will be appreciated that in embodiments there are also a plurality of pipes through which the wastewater treatment device communicates with the medicament storage device and the wastewater treatment device. For the sake of a complete and specific description of the invention, the line of the wastewater treatment device communicating with the medicament storage device is hereinafter defined as a first line 4 and the line of the wastewater treatment device communicating with the wastewater delivery device is defined as a second line 5. The first pipeline 4 and the second pipeline 5 are provided with electrical components to collect or control relevant working parameters of the wastewater or the liquid medicine. In some embodiments, the allocation of the first functional electrical component and the second functional electrical component on the first pipeline 4 may be set according to the actual use requirement, for example, the working parameters of the liquid medicine in the first pipeline 4 are not monitored; in some embodiments, the second pipeline 5 is provided with a first functional electrical component and a second functional electrical component.
In a further aspect, the medicament storage device comprises: a medicine storage tank 1, wherein the medicine storage tank 1 contains medicines; a metering pump 2 connected with the medicine storage tank 1 and used for pumping the medicine to the wastewater treatment device in a set dosage; the first electromagnetic valve 3 is arranged on a pipeline which is communicated with the medicine storage tank 1 and the wastewater treatment device so as to control the on-off of the medicine. The waste water conveying device comprises: a water inlet pump 7 for pumping the wastewater to a wastewater treatment device; the second electromagnetic valve 9 is arranged on a pipeline which is communicated with the wastewater output device and the wastewater treatment device so as to control the on-off of water flow; a flow meter 8 is arranged between the second electromagnetic valve 9 and the water inlet pump 7 to monitor the flow of the wastewater entering the wastewater treatment device.
Specifically, the medicine storage tank 1 is a tank body/box body/tank body containing alkali liquor or acid liquor, the medicine storage tank 1 is communicated with the wastewater treatment device through a first pipeline 4, a metering pump 2 is arranged on the first pipeline 4, and can provide power for flowing alkali liquor or acid liquor with set content to flow out of the first pipeline 4, the first electromagnetic valve 3 controls valve plates to be opened and closed by utilizing electric energy, when the first electromagnetic valve 3 is opened, liquid in the first pipeline 4 flows out, and when the first electromagnetic valve 3 is closed, the liquid in the first pipeline 4 stops conveying. In this embodiment, the control system obtains the dosage of the medicament to be added according to the wastewater flow, the current pH value and the target pH value, and adjusts the set content to the required dosage by controlling the metering pump 2. In some embodiments, the metering pump 2 may be an electromagnetic metering pump 2 or a motor metering pump 2.
More specifically, the water inlet pump 7 is disposed on the second pipeline 5, the inlet of the water inlet pump 7 is communicated with the wastewater output device, the wastewater output device is a device containing wastewater, specifically, an output end in a previous step of the wastewater pH value adjusting step, the flowmeter 8 is disposed on the second pipeline 5 and located behind the water inlet pump 7 so as to collect the flow of the wastewater, the dosage of the medicament can be preset according to the flow of the wastewater, and if the current pH value deviates from the target pH value, the dosage of the medicament is adjusted in cooperation with the current pH value and the target pH value. The second pipeline 5 is also provided with a second electromagnetic valve 9, wherein the structure and principle of the second electromagnetic valve 9 are the same as those of the first electromagnetic valve 3, and the second electromagnetic valve is used for controlling the circulation and blocking of waste water in the second pipeline 5.
In some embodiments, ball valves 6 may be provided before and after the intake pump 7.
In a further aspect, the wastewater treatment apparatus includes: a primary mixer 10, the primary mixer 10 being respectively communicated with an outlet of the medicament storage device and an outlet of the wastewater delivery device to perform at least primary mixing of the medicament and the wastewater; a circulation pump 13, wherein an inlet of the circulation pump 13 is communicated with an outlet of the primary mixer 10, and an outlet of the circulation pump 13 is respectively communicated with an inlet of the primary mixer 10 and a wastewater collection device; the third electromagnetic valve 17, the third electromagnetic valve 17 is set up on the pipeline that the circulation pump 13 communicates with primary mixer 10, in order to control the on-off of mixed liquor. In still further aspects, the wastewater treatment apparatus further comprises: the secondary mixer 14, the secondary mixer 14 is arranged between the primary mixer 10 and the medicament storage device and the wastewater conveying device, so that the mixed solution of medicament and wastewater flows into the primary mixer 10 for re-mixing after being mixed by the secondary mixer 14; alternatively, the secondary mixer 14 is provided between the inlet of the primary mixer 10 and the outlet of the circulation pump 13 so that the mixed liquid of the chemical and the wastewater is mixed by the primary mixer 10 and then flows into the secondary mixer 14 to be mixed again.
In the present embodiment, the circulation pump 13 splits the mixed liquid (mixed liquid of the chemical and the wastewater) flowing out of the primary mixer 10 into two pipes, and hereinafter, a pipe through which the circulation pump 13 communicates with the primary mixer 10 is defined as a third pipe, and a pipe through which the circulation pump 13 communicates with the wastewater collection device is defined as a fourth pipe 15.
Specifically, the primary mixer 10 and the secondary mixer 14 are devices for providing a mixing space for the chemical and the wastewater to form a mixed solution, and the mixed solution finally flows to a wastewater collection device, wherein the wastewater collection device may be an external environment or an inlet end of a rear-end treatment process in the wastewater treatment process. The third electromagnetic valve 17 is used for controlling the on-off of the mixed liquid of the third pipeline, and is the same as the first electromagnetic valve 3 and the second electromagnetic valve 9. When the current pH value is nearly consistent with the target pH value, the third electromagnetic valve 17 is closed, and the third pipeline is closed; when the current pH value deviates from the target pH value, the third solenoid valve 17 is opened and the third line is opened.
In some embodiments, the medicament and the wastewater enter the primary mixer 10 to be mixed at one stage, the mixed solution after the primary mixing is pumped into the third pipeline and the fourth pipeline 15 through the outlet of the primary mixer 10 by the circulating pump 13, and part of the mixed solution after the primary mixing flows back into the primary mixer 10 through the third pipeline to be mixed at two stages and flows to the fourth pipeline 15 through the outlet of the first mixer; meanwhile, part of the mixed liquid after primary mixing directly flows out of the fourth pipeline 15, so that the primary mixing and the secondary mixing of the mixed liquid are realized.
In still other embodiments, where the primary mixer 10 and the secondary mixer 14 are used in combination, the present invention contemplates two multi-stage mixing schemes where the primary mixer and the secondary mixer 14 are provided simultaneously:
referring to fig. 2 again, when the primary mixer 10 is located behind the secondary mixer 14, that is, when the secondary mixer 14 is located between the primary mixer 10 and the chemical storage device and the wastewater delivery device, the outlet of the chemical storage device and the outlet of the wastewater delivery device are simultaneously communicated with the inlet of the secondary mixer 14, the outlet of the secondary mixer 14 is communicated with the inlet of the primary mixer 10, after primary mixing in the secondary mixer 14, the mixed solution enters the primary mixer 10 to be subjected to secondary mixing, the mixed solution after secondary mixing is pumped into the third pipeline and the fourth pipeline 15 through the outlet of the primary mixer 10 by the circulating pump 13, and part of the mixed solution after secondary mixing flows back into the primary mixer 10 through the third pipeline to be subjected to tertiary mixing, and then flows to the fourth pipeline 15 through the outlet of the first mixer; meanwhile, part of mixed liquid after secondary mixing directly flows out of the fourth pipeline 15, so that the secondary mixing and the tertiary mixing of the mixed liquid are realized;
referring to fig. 1 again, when the primary mixer 10 is located in front of the secondary mixer 14, that is, when the secondary mixer 14 is disposed on the third pipeline, the outlet of the agent storage device and the outlet of the wastewater conveying device are communicated with the inlet of the primary mixer 10, the outlet of the primary mixer 10 is respectively communicated with the inlet of the secondary mixer 14 and the wastewater collecting device, after primary mixing in the primary mixer 10, the mixed liquid after primary mixing is pumped into the third pipeline and the fourth pipeline 15 through the outlet of the primary mixer 10 by the circulating pump 13, part of the mixed liquid after primary mixing enters the secondary mixer 14 to be subjected to secondary mixing, the mixed liquid after secondary mixing flows back into the primary mixer 10 through the third pipeline to be subjected to tertiary mixing, and then flows to the fourth pipeline 15 through the outlet of the first mixer; meanwhile, part of the mixed liquid after primary mixing directly flows out of the fourth pipeline 15, so that the primary mixing and the tertiary mixing of the mixed liquid are realized.
In summary, the primary mixer 10 and the secondary mixer 14 in the embodiment of the invention are matched with each other, the system can realize three-stage mixing, meanwhile, the solution mixing effect is enhanced by adopting a closed circulation mode of the reflux of the mixer, the number of processing equipment is reduced, the mixing effect of the mixed solution is enhanced, the mixing efficiency is high, the corrosion of acid-base environment to mechanical stirring equipment is avoided, and the maintenance cost is reduced.
In some embodiments, the wastewater treatment device further comprises an acid-base indicator 12 arranged on the primary mixer 10 to monitor the pH value of the mixed liquid in the primary mixer 10; the liquid level meter 11 is arranged on the primary mixer 10 to monitor the liquid level value of the mixed liquid in the primary mixer 10.
Specifically, the acid-base indicator 12 collects the current pH value of the mixed liquid in the primary mixer 10, compares the current pH value with the target pH value according to the current pH value, and closes the third electromagnetic valve 17 when the current pH value is nearly identical to the target pH value, so that the mixed liquid directly flows from the outlet of the primary mixer 10 to the wastewater collection device; when the current pH value deviates from the target pH value, the third electromagnetic valve 17 is opened, the mixed liquid flows back to the first-stage mixer 10 from the outlet of the first mixer through the third pipeline to be mixed again, the mixing effect of the mixed liquid is enhanced, and the adding amount of the medicament is adjusted by matching with the flow rate of the wastewater and the target pH value, in the embodiment, the water inlet pump 7 and the metering pump 2 are in variable frequency, the water inlet amount and the adding amount are automatically adjusted according to the liquid level display value which can be acquired according to the liquid level meter 11, and the liquid level value acquired by the liquid level meter 11 is accurate to 0.01m. For example, when the liquid level value is higher than a set value, the flow of the water inlet pump 7 is reduced, the dosage of the metering pump 2 is correspondingly reduced, and the water in the buffer tank is prevented from overflowing; when the liquid level value is lower than the set value, the flow of the water inlet pump 7 is increased, and the dosage of the electromagnetic metering pump 2 is correspondingly increased.
In another preferred embodiment extending from this embodiment, the primary mixer 10 and the secondary mixer 14 have receiving cavities configured to receive the mixed liquor, wherein the receiving cavities of the primary mixer 10 are sized differently from the receiving cavities of the secondary mixer 14. In the present embodiment, the primary mixer 10 and the secondary mixer 14 are different in size, and the mixed liquid flowing from the primary mixer 10 into the secondary mixer 14 or flowing from the secondary mixer 14 into the primary mixer 10 generates a venturi effect, thereby accelerating the flow rate and the mixing degree of the mixed liquid. Specifically, the primary mixer 10 is sized larger than the secondary mixer 14 so that the primary mixer 10 can treat a large amount of wastewater at one time without using the secondary mixer 14.
Referring again to fig. 3, in yet another alternative, two medicament storage devices are provided, the medicaments contained in the corresponding medicament storage tanks 1 in the two medicament storage devices are respectively acid solution and alkali solution; wherein, the liquid crystal display device comprises a liquid crystal display device,
any one of the two medicament storage devices is communicated with the wastewater treatment device. By adding the medicament storage device, the medicament storage device is respectively used as an acid medicament adding system and an alkali medicament adding system, an acid adding mode or an alkali adding mode is automatically selected by comparing an initial pH value and a target pH value, if the current pH value does not reach the target pH value, the acid/alkali is continuously added, and if the medicament addition excess exceeds the target value, the other mode is started to carry out callback. The pH of water such as wastewater is 10, the target pH is 7, the equipment selects an acid adding mode, acid adding is continued if the pH is 9 after acid adding and mixing, and if the pH is 5, an alkali adding mode is started to adjust the pH to 7.
In a further alternative, the metering pump 2 and the first solenoid valve 3 in the medicament storage device, the inlet pump 7 and the second solenoid valve 9 in the waste water delivery device and the circulation pump 13 and the third solenoid valve 17 in the waste water treatment device are all provided with a back-up set, which is defined as the same back-up pump and back-up valve as the corresponding pump and valve. In this embodiment, by providing the corresponding pump and valve with the backup pump and backup valve, when the main pump and main valve fail, the backup pump and backup valve can be started to ensure continuous operation of the whole wastewater treatment process. Illustratively, the inlet end of the first line 4 is provided with two branches, a branch with a metering pump 2 and a first solenoid valve 3 and a branch with a standby metering pump 2 and a standby first solenoid valve 3, respectively, the second line 5 and the third line being provided as above.
In the specific embodiment, before the system is started, the ball valves 6 before and after the water inlet pump 7 are opened, after the water inlet pump 7 is started, the second electromagnetic valve 9 is opened, the wastewater is conveyed to a mixer (a primary mixer 10 or a secondary mixer 14) by the water inlet pump 7 through a water inlet pipe, and the flow is regulated to a set range through the flowmeter 8; meanwhile, determining an added medicament according to the initial pH value and the target pH value of the wastewater, quantitatively adding the medicament into a mixer through a metering pump 2, and fully mixing the medicament and the wastewater in the mixer; the bottom of the mixer is provided with a water outlet, the water inlet end of the circulating pump 13 is connected with a pipeline, and the water outlet end of the circulating pump 13 is connected with a third pipeline and a fourth pipeline 15. The wastewater with the pH value adjusted is finally conveyed to the next treatment process from the fourth pipeline 15 through the circulating pump 13, if the target pH value is not reached, the dosage of the metering pump 2 is automatically adjusted by comparing with the target pH value, and meanwhile, the third electromagnetic valve 17 on the third pipeline is opened, and the wastewater is mixed again in the buffer tank.
Examples:
(1) The pH value of ammonium bicarbonate precipitation wastewater (simply called precipitation wastewater) is 7.2, and the ammonium bicarbonate precipitation wastewater enters the system after oil removal treatment through a front-end treatment procedure, and the pH value is required to be adjusted to 5-6. According to the process requirement, 20% hydrochloric acid is stored in the medicament storage tank, and the fluctuation range of the wastewater flow is 4m 3 /h～15m 3 And/h, the design flow of the water inlet pump 7 is 20m 3 /h。
(2) The equipment pipeline, the medicine storage pipe, the mixer and the pump are made of anti-corrosion materials, and the metering pump 2, the water inlet pump 7, the circulating pump 13 and the matched valves thereof are used for one time, so that standby equipment can be started when the equipment fails, and the normal operation of the equipment is ensured; starting the equipment, opening valves on the water inlet pump 7, the metering pump 2 and a matched pipeline thereof, and monitoring the flow of the wastewater to be 8m through the flowmeter 8 3 And (3) preliminarily determining that the acid adding amount is 80L/h, and mixing hydrochloric acid and the precipitation wastewater in the primary mixer 10; the circulation pump 13 and the matched valve thereof are started, the secondary mixer 14 is started at the same time, the pH value of the wastewater is shown as 6.4, the adding amount of hydrochloric acid is increased to 90L/h by adjusting the metering pump 2, and the mixing in the primary mixer 10 is carried outThe liquid is conveyed to the secondary mixer 14 through the circulating pump 13 to be secondarily mixed, then flows back to the primary mixer 10 to be mixed with the incoming water and the hydrochloric acid again, the touch screen of the electric cabinet displays pH=5.5, and the liquid is discharged to the next working procedure from the water outlet pipeline through the circulating pump 13.
Another aspect of the present invention is to propose a method for treating industrial wastewater, which is applied to the industrial wastewater treatment system as described above.
For the above method embodiments, since they are substantially similar to the system embodiments, the description is relatively simple, and the relevant points are referred to in the description of the system embodiments.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.
It should also be noted that, in the present document, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Moreover, relational terms such as "first" and "second" may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions, or order, and without necessarily being construed as indicating or implying any relative importance. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal.
The foregoing has outlined some of the more detailed description of the present application for the purposes of providing an improved system and method for treating industrial waste water, wherein the detailed description is given for the purpose of illustrating the principles and embodiments of the present application. Also, various modifications in the details and application scope may be made by those skilled in the art in light of this disclosure, and all such modifications and variations are not required to be exhaustive or are intended to be within the scope of the disclosure.
Claims (10)
1. An industrial wastewater treatment system, comprising:
a medicament storage device configured to be loaded with a medicament configured to neutralize a ph of the wastewater;
a wastewater conveying device configured to facilitate water flow on-off between the wastewater output device and the wastewater treatment device and to perform parameter monitoring on the wastewater conveyed;
a wastewater treatment device which communicates with the chemical storage device and the wastewater transport device, respectively, to mix the wastewater transported from the wastewater transport device and the chemical transported from the chemical storage device;
wherein the system further comprises:
and the control device is respectively and electrically connected with the medicament storage device, the wastewater conveying device and the wastewater treatment device, and controls the dosage of the medicament entering the wastewater treatment device based on the monitored parameters of the wastewater.
2. An industrial wastewater treatment system according to claim 1 wherein the medicament storage device comprises:
a drug storage canister containing a medicament therein;
a metering pump connected with the medicine storage tank and used for pumping the medicine to the wastewater treatment device in a set dosage;
the first electromagnetic valve is arranged on a pipeline which is communicated with the medicine storage tank and the wastewater treatment device so as to control the on-off of the medicine.
3. An industrial wastewater treatment system according to claim 1 wherein the wastewater delivery device comprises:
a water inlet pump for pumping the wastewater to the wastewater treatment device;
the second electromagnetic valve is arranged on a pipeline which is communicated with the wastewater output device and the wastewater treatment device so as to control the on-off of the water flow;
and the flowmeter is positioned between the second electromagnetic valve and the water inlet pump so as to monitor the flow of the wastewater entering the wastewater treatment device.
4. An industrial wastewater treatment system according to claim 1 wherein the wastewater treatment device comprises:
a primary mixer in communication with the outlet of the medicament storage device and the outlet of the wastewater delivery device, respectively, to at least primary mix the medicament and the wastewater;
the inlet of the circulating pump is communicated with the outlet of the primary mixer, and the outlet of the circulating pump is respectively communicated with the inlet of the primary mixer and the wastewater collection device;
and the third electromagnetic valve is arranged on a pipeline which is communicated with the circulating pump and the primary mixer so as to control the on-off of the mixed liquid.
5. The industrial wastewater treatment system of claim 4, wherein the wastewater treatment device further comprises:
the secondary mixer is arranged between the primary mixer and the medicament storage device as well as between the medicament storage device and the wastewater conveying device, so that mixed liquid of the medicament and the wastewater flows into the primary mixer for re-mixing after being mixed by the secondary mixer; or alternatively, the process may be performed,
the secondary mixer is arranged between the inlet of the primary mixer and the outlet of the circulating pump, so that the mixed liquid of the medicament and the wastewater flows into the secondary mixer for mixing again after being mixed by the primary mixer.
6. The industrial wastewater treatment system of claim 4, wherein the wastewater treatment device further comprises:
the acid-base indicator is arranged on the primary mixer to monitor the pH value of the mixed liquid in the primary mixer;
the liquid level meter is arranged on the primary mixer to monitor the liquid level value of the mixed liquid in the primary mixer.
7. The industrial wastewater treatment system of claim 5, wherein the primary mixer and the secondary mixer have receiving cavities configured to receive a mixed liquor, wherein the receiving cavities of the primary mixer are sized differently than the receiving cavities of the secondary mixer.
8. An industrial wastewater treatment system according to claim 2, wherein two of said chemical storage devices are provided, and wherein said chemicals contained in said corresponding ones of said chemical storage devices are acid and alkali respectively; wherein, the liquid crystal display device comprises a liquid crystal display device,
any one of the two medicament storage devices is communicated with the wastewater treatment device.
9. An industrial wastewater treatment system according to any of claims 2-4, characterized in that the metering pump and the first solenoid valve in the agent storage means, the water inlet pump and the second solenoid valve in the wastewater delivery means and the circulation pump and the third solenoid valve in the wastewater treatment means are all provided with a back-up set, which is defined as the same back-up pump and back-up valve as the corresponding pump and valve.
10. A method of industrial wastewater treatment, characterized in that the method is applied to an industrial wastewater treatment system according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310071863.7A CN116354483A (en) | 2023-01-13 | 2023-01-13 | Industrial wastewater treatment system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310071863.7A CN116354483A (en) | 2023-01-13 | 2023-01-13 | Industrial wastewater treatment system and method |
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