Energy-saving optimization system for waste gas and waste water treatment

Abstract

The invention relates to the technical field of energy-saving optimization, in particular to an energy-saving optimization system for waste gas and waste water treatment, which comprises an electrolytic tank monitoring module, an electrolytic tank waste water and waste gas purification module, a current intensity output module and a current intensity adjusting module. The capacity of wastewater in the electrolytic tank and the temperature of the wastewater in the electrolytic tank are monitored through the electrolytic tank monitoring module, then a temperature purification threshold value of the wastewater in the electrolytic tank is set through the threshold value comparison unit, the monitored temperature of the wastewater is compared with the temperature purification threshold value, and if the actual temperature in the electrolytic tank is smaller than the temperature purification threshold value of the wastewater, the wastewater is purified. If yes, a comparison success signal is output to the wastewater purification unit, and the wastewater in the electrolytic tank is purified through the wastewater purification unit, so that the wastewater in the electrolytic tank is always at a proper temperature in the purification process, and the waste of current is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving optimization, and in particular to an energy-saving optimization system for waste gas and wastewater treatment. Background Art

[0002] In the process of current factory production, in order to make the emissions meet the emission standards, wastewater treatment equipment and waste gas treatment equipment are used to purify the emissions before discharge. Although the emissions are purified by wastewater treatment equipment and waste gas treatment equipment, the current wastewater treatment equipment and waste gas treatment equipment waste energy.

[0003] Because metals need to be cooled by water during processing, the water will contain a large amount of harmful impurities and metals after use. Existing systems usually use electrolytic oxidation to purify wastewater after use. However, during the purification process, the electrolytic oxidation method requires the output of current inside the electrolytic cell, and the current reacts chemically with harmful impurities in the wastewater to purify the wastewater.

[0004] However, during the purification process, the temperature of the wastewater will increase during the purification of the wastewater inside the electrolytic oxidation method. At this time, the frequency of the current output by the electrolytic oxidation method to the electrolytic cell can be reduced so that the harmful impurities inside the electrolytic cell can fully react with the current. At this time, if the metal continues to be processed, the wastewater generated during the processing will continue to be injected into the electrolytic cell. If the output current signal is not adjusted, it will affect the efficiency of the wastewater evolution and cause a waste of current. In view of this, we propose an energy-saving optimization system for waste gas and wastewater treatment. Summary of the invention

[0005] The object of the present invention is to provide an energy-saving optimization system for waste gas and wastewater treatment to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides an energy-saving optimization system for waste gas and wastewater treatment, including an electrolytic cell monitoring module, an electrolytic cell wastewater and waste gas purification module, a current intensity output module and a current intensity adjustment module.

[0007] The electrolytic cell monitoring module is used to monitor the wastewater capacity in the electrolytic cell and the temperature of the wastewater in the electrolytic cell;

[0008] The electrolytic cell monitoring module includes a liquid volume monitoring unit and a temperature monitoring unit;

[0009] The liquid volume monitoring unit is used to transmit ultrasonic pulses through a transmitter, and then receive ultrasonic waves reflected from the liquid surface through a receiver, and finally monitor the wastewater level in the electrolytic cell by purifying the time difference between the transmitted and received signals, and then calculate the wastewater volume in the electrolytic cell according to the liquid level and the size of the electrolytic cell;

[0010] The calculation formula for the amount of wastewater in the electrolytic cell is as follows:

[0011]

[0012] Among them, h is the amount of wastewater in the electrolytic cell, c is the propagation speed of sound waves in the wastewater in the electrolytic cell, t is the time from the emission to the reception of the ultrasonic pulse. Since the ultrasonic wave travels back and forth between the liquid surface and the liquid meter, half of the time is used in the actual calculation formula. A is the size of the electrolytic cell;

[0013] The temperature monitoring unit is used to form a closed loop in the electrolytic cell through two different metal conductors. If the temperatures of the two different metal conductors are different, an electromotive force proportional to the temperature difference will be generated in the loop of one of the metal conductors according to the thermoelectric effect. The electromotive force is transmitted to the measuring instrument through the junction box. Since there is a certain functional relationship between the electromotive force and the temperature, the electromotive force is converted into a temperature value through calculation and displayed;

[0014] The calculation formula is as follows:

[0015] E=E0+S(T-T0)

[0016] Where, E is the electromotive force at temperature T, E0 is the electromotive force at reference temperature T0, S is the sensitivity of the measuring instrument, T is the actual measured temperature, T0 is the reference temperature, which is 0℃;

[0017] The calculation example is as follows:

[0018] Assume that the measuring instrument shows that the electromotive force is 0mV at 0℃, the sensitivity S is 41.0mV / ℃, and the hot spot potential currently measured is 24.5mV. The calculation formula for the actual measured temperature T is as follows:

[0019] 24.5mV=0mV+41.0mV / ℃×(T-0℃)

[0020] T≈0.598℃

[0021] Therefore, the actual temperature inside the electrolytic cell is about 0.598°C at this time.

[0022] The electrolytic cell monitoring module also includes a liquid inflow sensing unit;

[0023] The liquid inflow sensing unit is used to receive the current signal output by the wastewater purification unit, and monitor the pressure change inside the electrolytic cell in real time. When new wastewater is injected into the electrolytic cell, the pressure change inside the electrolytic cell is recorded until the pressure disappears. At this time, the amount of wastewater injected into the electrolytic cell is calculated by monitoring the difference in pressure change and the internal size of the electrolytic cell;

[0024] The calculation formula is as follows:

[0025] P=A(ρ-g)

[0026] Among them, P is the amount of wastewater injected into the electrolytic cell, A is the internal size of the electrolytic cell, which is provided by the electrolytic cell manufacturer, ρ is the pressure after the wastewater is injected into the electrolytic cell, and g is the pressure before the wastewater is injected into the electrolytic cell.

[0027] The electrolytic cell monitoring module also includes a metal calculation unit;

[0028] The metal calculation unit is used to receive the current signal output frequency in the wastewater purification unit, and analyze the wastewater liquid volume after being purified by the wastewater purification unit under an ideal state in the electrolytic cell according to the current output frequency, and receive the wastewater liquid volume after being purified by the wastewater purification unit monitored by the liquid volume monitoring unit, and then compare the two to calculate the metal content in the wastewater in the electrolytic cell;

[0029]

[0030] C is the metal content in the wastewater in the electrolytic cell, A is the liquid volume of the wastewater before purification by the wastewater purification unit monitored by the liquid volume monitoring unit, and B is the liquid volume of the wastewater after purification by the wastewater purification unit monitored by the liquid volume monitoring unit.

[0031] The electrolytic cell wastewater and waste gas purification module includes a threshold comparison unit and a wastewater purification unit;

[0032] The threshold comparison unit is used to set the wastewater temperature purification threshold inside the electrolytic cell, and receive the actual temperature inside the electrolytic cell monitored by the temperature monitoring unit, and compare the wastewater temperature purification threshold with the actual temperature inside the electrolytic cell. If the actual temperature inside the electrolytic cell is less than the wastewater temperature purification threshold, a comparison success signal is output to the wastewater purification unit. If the actual temperature inside the electrolytic cell is greater than or equal to the wastewater temperature purification threshold, the comparison continues;

[0033] If the actual temperature < wastewater temperature treatment threshold, the output signal is output. If the actual temperature ≥ wastewater temperature treatment threshold, the comparison is continued.

[0034] The wastewater purification unit is used to receive the comparison success signal outputted from the threshold comparison unit, and after receiving the signal, output a normal current signal, at this time, the anode and cathode inside the electrolytic cell are activated by the current signal, after the anode is activated, the wastewater inside the electrolytic cell undergoes an oxidation reaction with the anode, and the pollutants in the wastewater lose electrons and are oxidized, and after the cathode is activated, a reduction reaction occurs, and the water is reduced to produce hydrogen and hydroxide ions, thereby purifying the wastewater in the electrolytic cell;

[0035] The electrolysis time calculation formula is as follows:

[0036]

[0037] Where T is the electrolysis time, Q is the amount of electricity, I is the current intensity, Q=zFm, z is the number of electrons transferred in the reaction, F is the Faraday constant, which is used to convert the amount of electricity into the amount of substance, which is approximately T96500 coulomb / mole, and m is the molar amount of the substance involved in the reaction.

[0038] The electrolytic cell wastewater and waste gas purification module also includes a waste gas purification unit;

[0039] The exhaust gas purification unit is used to receive the comparison success signal output from the threshold comparison unit. After receiving the signal, a high voltage is applied to a group of corona electrodes to ionize the air molecules around the corona electrodes to form a corona discharge. At this time, a large number of positive and negative ions are generated. When the particles in the exhaust gas pass through the corona area, they collide with the ions and acquire electric charges. The charged particles then enter the electric field formed by another group of collecting electrodes. Due to the action of the electric field force, the charged particles are attracted to the surface of the dust collecting electrode and deposited, thereby being separated from the airflow, and purifying the exhaust gas during metal processing;

[0040] The dust removal efficiency calculation formula for exhaust gas purification is as follows:

[0041]

[0042] Where η is the dust removal efficiency, C in is the concentration of particulate matter in the gas entering the dust collector, C out It is the concentration of particulate matter in the gas leaving the dust collector.

[0043] The current intensity output module includes a current calculation unit and a current output unit;

[0044] The current calculation unit is used to calculate the current signal adjustment coefficient of the wastewater purification unit for purifying the wastewater in the electrolytic cell based on the wastewater liquid volume in the electrolytic cell monitored by the liquid volume monitoring unit and the wastewater temperature in the electrolytic cell monitored by the temperature monitoring unit;

[0045] When the temperature of the wastewater in the electrolytic cell is too high, the kinetic energy of the molecules in the wastewater will increase, the collision frequency and collision energy of the reactant molecules will increase, and the rate of the electrolysis reaction will increase. At this time, the wastewater purification unit can output a lower current to purify the wastewater. On the contrary, when the temperature is too low, it is necessary to increase the current output by the wastewater purification unit.

[0046] When the amount of wastewater in the electrolytic cell is too high, the electrodes of the wastewater purification unit are partially submerged, the effective electrode area is reduced, and the electrolysis efficiency is reduced. At this time, the current output by the wastewater purification unit should be increased. On the contrary, when the amount of wastewater is too low, the current output by the wastewater purification unit needs to be increased.

[0047] The above adjustment coefficient calculation formula is as follows:

[0048] K adjust =K level ×K temp

[0049] Among them, K adjust is the calculated adjustment coefficient, K level is the liquid volume adjustment factor, calculated based on the change in liquid volume relative to the optimal liquid volume, K temp is the temperature adjustment factor, calculated based on the change in wastewater temperature relative to the optimum temperature;

[0050] Liquid volume adjustment coefficient K level The calculation formula is as follows:

[0051]

[0052] If K level When the liquid volume adjustment coefficient is ≤80%, the temperature adjustment coefficient will increase by 10% for every 10% decrease in the liquid volume adjustment coefficient. The initial optimal liquid volume is determined manually.

[0053] If K level When the liquid volume adjustment coefficient is ≤120%, the temperature adjustment coefficient decreases by 10% for every 10% increase in the liquid volume adjustment coefficient. The initial optimal liquid volume is determined manually.

[0054] Temperature adjustment coefficient K temp The calculation formula is as follows:

[0055]

[0056] If K temp When the temperature adjustment coefficient is ≤80%, the temperature adjustment coefficient increases by 10% for every 10% decrease in temperature adjustment coefficient, and the initial optimal temperature is determined manually;

[0057] If K temp When the temperature adjustment coefficient is ≥120%, the temperature adjustment coefficient decreases by 10% for every 10% increase, and the initial optimal temperature is determined manually;

[0058] The current output unit is used to receive the adjustment coefficient calculated in the current calculation unit, and adjust the current signal normally output in the wastewater purification unit according to the adjustment coefficient, and then output the calculated current signal to the wastewater purification unit;

[0059] I adjueted =I origiinal ×K adjust

[0060] Among them, I adjuetedis the adjusted output current signal in the wastewater purification unit, I origiinal is the normal output current signal in the wastewater purification unit, K adjust is the adjustment coefficient calculated in the current calculation unit,

[0061] The calculation example is as follows:

[0062] Assuming that the original current signal in the wastewater purification unit is 10 amperes, the adjustment factor calculated by the current calculation unit is 1.5:

[0063] I adjueted =10×1.5=15

[0064] Therefore, the current signal adjusted by the current output unit is 15 amperes.

[0065] The current intensity adjustment module includes a mixed wastewater calculation unit, a mixed adjustment unit and a current signal reduction unit;

[0066] The mixed wastewater calculation unit is used to receive the liquid volume of wastewater injected into the electrolytic cell calculated by the liquid inflow sensing unit and the liquid volume of wastewater monitored by the liquid volume monitoring unit;

[0067] The mixing time required for the injected wastewater and the wastewater inside the electrolytic cell to reach the same temperature is predicted based on the amount of wastewater injected into the electrolytic cell, and the time required for mixing is estimated by calculating the temperature difference between the amount of wastewater injected into the electrolytic cell and the wastewater inside the electrolytic cell, as well as the heat exchange coefficient between the two;

[0068] The temperature of the wastewater after mixing is calculated based on the monitored wastewater volume and the volume of wastewater injected into the electrolytic cell. During the mixing process, the wastewater exchanges heat with the wastewater inside the electrolytic cell and eventually reaches a new equilibrium temperature. This process predicts the temperature after mixing by calculating the heat change of the wastewater.

[0069] The mixing time is calculated as follows:

[0070]

[0071] Wherein, t is the mixing time, m is the amount of wastewater injected into the electrolytic cell calculated by the liquid inflow sensing unit, c is the specific heat capacity of the wastewater, usually c=4200, ΔT is the temperature difference between the injected wastewater and the wastewater inside the electrolytic cell, which can be known by monitoring the temperature before and after the wastewater injection by the temperature monitoring unit, h is the heat exchange coefficient, usually h=100, and A is the surface area of ​​the wastewater in contact with the wastewater inside the electrolytic cell;

[0072] The calculation example is as follows:

[0073] Assumptions:

[0074] The liquid volume m of the wastewater injected into the electrolytic cell calculated by the liquid inflow sensing unit is 100, the temperature difference ΔT between the injected wastewater and the wastewater inside the electrolytic cell is monitored by the temperature monitoring unit is 10° C., and the surface area A of the wastewater in contact with the wastewater inside the electrolytic cell is 1;

[0075]

[0076] Based on the above assumptions, the time required for wastewater mixing is approximately 420 seconds;

[0077] The temperature of the mixed wastewater is calculated as follows:

[0078]

[0079] Among them, T 混合 is the temperature after the monitored wastewater volume and the wastewater volume injected into the electrolytic cell are mixed, m1 is the volume of wastewater injected into the electrolytic cell calculated by the liquid inflow sensing unit, m2 is the volume of wastewater inside the electrolytic cell, c is the specific heat capacity of the wastewater, usually c=4200, T1 is the initial temperature of the wastewater injected into the electrolytic cell, and T2 is the initial temperature of the wastewater in the electrolytic cell;

[0080] The mixing adjustment unit is used to receive the wastewater temperature after the wastewater is mixed calculated by the mixed wastewater calculation unit, and output the wastewater temperature after the wastewater is mixed and the wastewater liquid volume inside the electrolytic cell monitored by the liquid volume monitoring unit at this time to the current output unit, and calculate the current output signal of the wastewater purification unit after adjusting to the mixing time through the current output unit;

[0081] The current signal reducing unit is used to receive the mixed current output signal of the wastewater purification unit calculated by the mixing regulating unit, and to find the difference between the mixed current output signal and the current signal output by the wastewater purification unit at this time, and to receive the wastewater mixing time calculated by the mixed wastewater calculating unit, and to calculate the frequency of reducing the current signal output by the wastewater purification unit during the wastewater mixing time;

[0082] The calculation formula is as follows:

[0083]

[0084] Wherein, A is the frequency at which the wastewater purification unit reduces the output of the current signal during the wastewater mixing time, B is the current signal output by the wastewater purification unit at this time, C is the current output signal of the wastewater purification unit after mixing calculated by the mixing adjustment unit, and D is the wastewater mixing time calculated by the mixed wastewater calculation unit;

[0085] The current intensity adjustment module also includes a secondary adjustment unit;

[0086] The secondary adjustment unit is used to receive the mixed wastewater temperature calculated by the mixed wastewater calculation unit, and set a water temperature comparison threshold according to the mixed wastewater temperature, and then receive the water temperature monitored by the temperature monitoring unit, and compare the water temperature monitored by the temperature monitoring unit with the water temperature comparison threshold. When the mixed water temperature is less than or equal to the water temperature comparison threshold, the current output unit adjusts the current signal normally output by the wastewater purification unit.

[0087] The calculation formula is as follows:

[0088] The water temperature comparison threshold is set to 120% of the mixed wastewater temperature;

[0089] T 阈值 =T 混合 120%

[0090] If T 混合 ≤T 阈值 , then the current signal of the wastewater purification unit is adjusted through the current output unit;

[0091] Among them, T 阈值 To set the water temperature comparison threshold according to the mixed wastewater temperature, T 混合 The mixed wastewater temperature calculated by the mixed wastewater calculation unit.

[0092] The electrolytic cell monitoring module monitors the wastewater liquid volume and wastewater temperature in the electrolytic cell, and calculates the liquid volume of wastewater injected into the electrolytic cell during metal processing. The electrolytic cell wastewater and waste gas treatment module compares the wastewater temperature monitored in the electrolytic cell monitoring module with the set wastewater temperature treatment threshold. If the actual temperature inside the electrolytic cell is less than the wastewater temperature treatment threshold, the wastewater in the electrolytic cell is purified. The current intensity output module calculates the adjustment coefficient of the electrolytic cell wastewater and waste gas treatment module for the output current signal in the electrolytic cell through the wastewater liquid volume and wastewater temperature monitored by the electrolytic cell monitoring module, and adjusts the current output signal of the electrolytic cell wastewater and waste gas treatment module according to the current signal adjustment coefficient.

[0093] The mixed wastewater calculation unit predicts the mixing time when the injected wastewater reaches the same temperature as the wastewater inside the electrolytic cell according to the amount of wastewater injected into the electrolytic cell during metal processing and the monitored amount of wastewater, and calculates the temperature of the wastewater after the wastewater is mixed by the amount of wastewater monitored by the electrolytic cell monitoring module and the amount of wastewater injected into the electrolytic cell. The mixing adjustment unit outputs the wastewater temperature after the wastewater is mixed calculated by the mixed wastewater calculation unit and the amount of wastewater inside the electrolytic cell monitored by the electrolytic cell monitoring module at this time to the current output unit, calculates the current output signal of the electrolytic cell wastewater and exhaust gas treatment module after the mixing time is adjusted through the current intensity output module, and the current signal reduction unit calculates the difference between the current output signal calculated by the mixing adjustment unit and the normal current output signal of the electrolytic cell wastewater and exhaust gas treatment module, and calculates the frequency of reducing the current signal output by the electrolytic cell wastewater and exhaust gas treatment module during the wastewater mixing time according to the difference.

[0094] Compared with the prior art, the present invention has the following beneficial effects:

[0095] 1. In the energy-saving optimization system for waste gas and wastewater treatment, the wastewater capacity in the electrolytic cell and the temperature of the wastewater inside the electrolytic cell are monitored through the electrolytic cell monitoring module, and then the wastewater temperature purification threshold inside the electrolytic cell is set through the threshold comparison unit, and the monitored wastewater temperature is compared with it. If the actual temperature inside the electrolytic cell is less than the wastewater temperature purification threshold, a comparison success signal is output to the wastewater purification unit, and the wastewater inside the electrolytic cell is purified by the wastewater purification unit, so that the wastewater inside the electrolytic cell is always at a suitable temperature during the purification process, thereby avoiding waste of current;

[0096] At the same time, the wastewater capacity in the electrolytic cell and the wastewater temperature inside the electrolytic cell are monitored by the electrolytic cell monitoring module, and the current signal adjustment coefficient of the wastewater purification unit for purifying the wastewater in the electrolytic cell is calculated. The current output unit adjusts the current output by the wastewater purification unit through the current signal adjustment coefficient, so that the current output by the wastewater purification unit is the most appropriate current, avoiding the problem of current waste caused by excessive current output and poor wastewater purification effect caused by excessive output;

[0097] When new wastewater is injected during the wastewater purification process of the wastewater purification unit, the liquid inflow sensing unit calculates the amount of wastewater injected into the electrolytic cell, the mixed wastewater calculation unit predicts the mixing time when the injected wastewater reaches the same temperature as the wastewater inside the electrolytic cell according to the amount of water injected into the electrolytic cell, calculates the temperature of the wastewater after the wastewater is mixed according to the monitored amount of wastewater and the amount of wastewater injected into the electrolytic cell, the mixing adjustment unit outputs the wastewater temperature after the wastewater is mixed and the amount of wastewater inside the electrolytic cell monitored by the liquid amount monitoring unit to the current output unit, calculates the current output signal of the wastewater purification unit after the mixing time through the current output unit, and calculates the difference between the mixed current output signal and the current signal output by the wastewater purification unit at this time, and calculates the frequency of reducing the current signal output by the wastewater purification unit during the wastewater mixing time according to the difference and the wastewater mixing time calculated by the mixed wastewater calculation unit, so that the wastewater purification unit can be adjusted in time according to the changes in the wastewater to avoid waste of current. BRIEF DESCRIPTION OF THE DRAWINGS

[0098] Figure 1 It is the overall module principle diagram of the present invention;

[0099] Figure 2 It is a flow chart of the working principle of the present invention.

[0100] The meaning of each number in the figure is:

[0101] 100. Electrolytic cell monitoring module; 110. Liquid volume monitoring unit; 120. Temperature monitoring unit; 130. Metal calculation unit; 140. Liquid inflow sensing unit; 200. Electrolytic cell wastewater and exhaust gas purification module; 210. Threshold comparison unit; 220. Wastewater purification unit; 230. Exhaust gas purification unit; 300. Current intensity output module; 310. Current calculation unit; 320. Current output unit; 400. Current intensity adjustment module; 410. Mixed wastewater calculation unit; 420. Mixed adjustment unit; 430. Current signal reduction unit; 440. Secondary adjustment unit. DETAILED DESCRIPTION

[0102] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0103] An energy-saving optimization system for waste gas and waste water treatment includes an electrolytic cell monitoring module 100, an electrolytic cell waste water and waste gas purification module 200, a current intensity output module 300 and a current intensity adjustment module 400.

[0104] The electrolytic cell monitoring module 100 is used to monitor the wastewater capacity and the temperature of the wastewater in the electrolytic cell;

[0105] The electrolytic cell monitoring module 100 includes a liquid volume monitoring unit 110 and a temperature monitoring unit 120;

[0106] The liquid volume monitoring unit 110 is used to transmit ultrasonic pulses through a transmitter, and then receive ultrasonic waves reflected from the liquid surface through a receiver, and finally monitor the wastewater level in the electrolytic cell by purifying the time difference between the transmitted and received signals, and then calculate the wastewater volume in the electrolytic cell according to the liquid level and the size of the electrolytic cell;

[0107] The calculation formula for calculating the amount of wastewater in the electrolytic cell is as follows:

[0108]

[0109] Among them, h is the amount of wastewater in the electrolytic cell, c is the propagation speed of sound waves in the wastewater in the electrolytic cell, t is the time from the emission to the reception of the ultrasonic pulse. Since the ultrasonic wave travels back and forth between the liquid surface and the liquid meter, half of the time is used in the actual calculation formula. A is the size of the electrolytic cell;

[0110] The temperature monitoring unit 120 is used to form a closed loop in the electrolytic cell through two different metal conductors. If the temperatures of the junctions of the two different metal conductors are different, an electromotive force proportional to the temperature difference will be generated in the loop of one of the metal conductor junctions according to the thermoelectric effect. The electromotive force is transmitted to the measuring instrument through the junction box. Since there is a certain functional relationship between the electromotive force and the temperature, the electromotive force is converted into a temperature value through calculation and displayed;

[0111] The calculation formula is as follows:

[0112] E=E0+S(T-T0)

[0113] Where, E is the electromotive force at temperature T, E0 is the electromotive force at reference temperature T0, S is the sensitivity of the measuring instrument, T is the actual measured temperature, T0 is the reference temperature, which is 0℃;

[0114] The calculation example is as follows:

[0115] Assume that the measuring instrument shows that the electromotive force is 0mV at 0℃, the sensitivity S is 41.0mV / ℃, and the hot spot potential currently measured is 24.5mV. The calculation formula for the actual measured temperature T is as follows:

[0116] 24.5mV=0mV+41.0mV / ℃×(T-0℃)

[0117] T≈0.598℃

[0118] Therefore, the actual temperature inside the electrolytic cell is about 0.598°C at this time.

[0119] The electrolytic cell monitoring module 100 further includes a liquid inflow sensing unit 140;

[0120] The liquid inflow sensing unit 140 is used to receive the current signal output by the wastewater purification unit 220, and monitor the pressure change inside the electrolytic cell in real time. When new wastewater is injected into the electrolytic cell, the pressure change inside the electrolytic cell is recorded until the pressure disappears. At this time, the amount of wastewater injected into the electrolytic cell is calculated by monitoring the difference in pressure change and the internal size of the electrolytic cell;

[0121] The calculation formula is as follows:

[0122] P=A(ρ-g)

[0123] Among them, P is the amount of wastewater injected into the electrolytic cell, A is the internal size of the electrolytic cell, which is provided by the electrolytic cell manufacturer, ρ is the pressure after the wastewater is injected into the electrolytic cell, and g is the pressure before the wastewater is injected into the electrolytic cell.

[0124] The electrolytic cell monitoring module 100 also includes a metal calculation unit 130;

[0125] The metal calculation unit 130 is used to receive the current signal output frequency in the wastewater purification unit 220, and analyze the wastewater liquid volume after being purified by the wastewater purification unit 220 under an ideal state in the electrolytic cell according to the current output frequency, and receive the wastewater liquid volume after being purified by the wastewater purification unit 220 monitored by the liquid volume monitoring unit 110, and then compare the two to calculate the metal content in the wastewater in the electrolytic cell;

[0126]

[0127] C is the metal content in the wastewater in the electrolytic cell, A is the liquid volume of the wastewater before purification by the wastewater purification unit 220 monitored by the liquid volume monitoring unit 110, and B is the liquid volume of the wastewater after purification by the wastewater purification unit 220 monitored by the liquid volume monitoring unit 110.

[0128] The electrolytic cell wastewater and waste gas purification module 200 includes a threshold comparison unit 210 and a wastewater purification unit 220;

[0129] The threshold comparison unit 210 is used to set the wastewater temperature purification threshold inside the electrolytic cell, and receive the actual temperature inside the electrolytic cell monitored by the temperature monitoring unit 120, and compare the wastewater temperature purification threshold with the actual temperature inside the electrolytic cell. If the actual temperature inside the electrolytic cell is less than the wastewater temperature purification threshold, a comparison success signal is output to the wastewater purification unit 220. If the actual temperature inside the electrolytic cell is greater than or equal to the wastewater temperature purification threshold, the comparison continues;

[0130] If the actual temperature < wastewater temperature treatment threshold, the output signal is output. If the actual temperature ≥ wastewater temperature treatment threshold, the comparison is continued.

[0131] The wastewater purification unit 220 is used to receive the comparison success signal outputted from the threshold comparison unit 210. After receiving the signal, it outputs a normal current signal. At this time, the anode and cathode inside the electrolytic cell are activated by the current signal. After the anode is activated, the wastewater inside the electrolytic cell undergoes an oxidation reaction with the anode, and the pollutants in the wastewater lose electrons and are oxidized. After the cathode is activated, a reduction reaction occurs, and the water is reduced to produce hydrogen and hydroxide ions, thereby purifying the wastewater in the electrolytic cell.

[0132] The electrolysis time calculation formula is as follows:

[0133]

[0134] Where T is the electrolysis time, Q is the amount of electricity, I is the current intensity, Q=zFm, z is the number of electrons transferred in the reaction, F is the Faraday constant, which is used to convert the amount of electricity into the amount of substance, which is approximately T96500 coulomb / mole, and m is the molar amount of the substance involved in the reaction.

[0135] The electrolytic cell wastewater and waste gas purification module 200 further includes 230;

[0136] The exhaust gas purification unit 230 is used to receive the comparison success signal output from the threshold comparison unit 210. After receiving the signal, a high voltage is applied to a group of corona electrodes to ionize the air molecules around the corona electrodes to form a corona discharge. At this time, a large number of positive and negative ions are generated. When the particles in the exhaust gas pass through the corona area, they collide with the ions and acquire electric charges. The charged particles then enter the electric field formed by another group of collecting electrodes. Due to the action of the electric field force, the charged particles are attracted to the surface of the dust collecting electrode and deposited, thereby being separated from the airflow, and the exhaust gas during metal processing is purified;

[0137] The dust removal efficiency calculation formula for exhaust gas purification is as follows:

[0138]

[0139] Where η is the dust removal efficiency, C in is the concentration of particulate matter in the gas entering the dust collector, C out It is the concentration of particulate matter in the gas leaving the dust collector.

[0140] The current intensity output module 300 includes a current calculation unit 310 and a current output unit 320;

[0141] The current calculation unit 310 is used to calculate the current signal adjustment coefficient of the wastewater purification unit 220 for purifying the wastewater in the electrolytic cell, based on the wastewater liquid volume in the electrolytic cell monitored by the liquid volume monitoring unit 110 and the wastewater temperature in the electrolytic cell monitored by the temperature monitoring unit 120;

[0142] When the temperature of the wastewater in the electrolytic cell is too high, the kinetic energy of the molecules in the wastewater will increase, the collision frequency and collision energy of the reactant molecules will increase, and the rate of the electrolysis reaction will increase. At this time, the wastewater purification unit 220 can output a lower current to purify the wastewater. On the contrary, when the temperature is too low, the current output by the wastewater purification unit 220 needs to be increased.

[0143] When the amount of wastewater in the electrolytic cell is too high, the electrodes of the wastewater purification unit 220 are partially submerged, reducing the effective electrode area and lowering the electrolysis efficiency. At this time, the current output by the wastewater purification unit 220 should be increased. On the contrary, when the amount of wastewater is too low, the current output by the wastewater purification unit 220 needs to be increased.

[0144] The above adjustment coefficient calculation formula is as follows:

[0145] K adjust =K level ×K temp

[0146] Among them, K adjust is the calculated adjustment coefficient, K level is the liquid volume adjustment factor, calculated based on the change in liquid volume relative to the optimal liquid volume, K temp is the temperature adjustment factor, calculated based on the change in wastewater temperature relative to the optimum temperature;

[0147] Liquid volume adjustment coefficient K level The calculation formula is as follows:

[0148]

[0149] If K level When the liquid volume adjustment coefficient is ≤80%, the temperature adjustment coefficient will increase by 10% for every 10% decrease in the liquid volume adjustment coefficient. The initial optimal liquid volume is determined manually.

[0150] If K level When the liquid volume adjustment coefficient is ≤120%, the temperature adjustment coefficient decreases by 10% for every 10% increase in the liquid volume adjustment coefficient. The initial optimal liquid volume is determined manually.

[0151] Temperature adjustment coefficient K temp The calculation formula is as follows:

[0152]

[0153] If K tempWhen the temperature adjustment coefficient is ≤80%, the temperature adjustment coefficient increases by 10% for every 10% decrease in temperature adjustment coefficient, and the initial optimal temperature is determined manually;

[0154] If K tenp When the temperature adjustment coefficient is ≥120%, the temperature adjustment coefficient decreases by 10% for every 10% increase, and the initial optimal temperature is determined manually;

[0155] The current output unit 320 is used to receive the adjustment coefficient calculated in the current calculation unit 310, and adjust the current signal normally output in the wastewater purification unit 220 according to the adjustment coefficient, and then output the calculated current signal to the wastewater purification unit 220;

[0156] I adjueted =I origiinal ×K adjust

[0157] Among them, I adjueted is the adjusted output current signal in the wastewater purification unit 220, I origiinal is the normal output current signal in the wastewater purification unit 220, K adjust is the adjustment coefficient calculated in the current calculation unit 310,

[0158] The calculation example is as follows:

[0159] Assuming that the original current signal in the wastewater purification unit 220 is 10 amperes, the adjustment coefficient calculated by the current calculation unit 310 is 1.5:

[0160] I adjueted =10×1.5=15

[0161] Therefore, the current signal adjusted by the current output unit 320 is 15 amperes.

[0162] The current intensity adjustment module 400 includes a mixed wastewater calculation unit 410, a mixed adjustment unit 420 and a current signal reduction unit 430;

[0163] The mixed wastewater calculation unit 410 is used to receive the liquid volume of wastewater injected into the electrolytic cell calculated by the liquid inflow sensing unit 140 and the liquid volume of wastewater monitored by the liquid volume monitoring unit 110;

[0164] The mixing time required for the injected wastewater and the wastewater inside the electrolytic cell to reach the same temperature is predicted based on the amount of wastewater injected into the electrolytic cell, and the time required for mixing is estimated by calculating the temperature difference between the amount of wastewater injected into the electrolytic cell and the wastewater inside the electrolytic cell, as well as the heat exchange coefficient between the two;

[0165] The temperature of the wastewater after mixing is calculated based on the monitored wastewater volume and the volume of wastewater injected into the electrolytic cell. During the mixing process, the wastewater exchanges heat with the wastewater inside the electrolytic cell and eventually reaches a new equilibrium temperature. This process predicts the temperature after mixing by calculating the heat change of the wastewater.

[0166] The mixing time is calculated as follows:

[0167]

[0168] Wherein, t is the mixing time, m is the amount of wastewater injected into the electrolytic cell calculated by the liquid inflow sensing unit 140, c is the specific heat capacity of the wastewater, usually c=4200, ΔT is the temperature difference between the injected wastewater and the wastewater inside the electrolytic cell, which can be known by monitoring the temperature before and after the wastewater is injected through the temperature monitoring unit 120, h is the heat exchange coefficient, usually h=100, and A is the surface area of ​​the wastewater in contact with the wastewater inside the electrolytic cell;

[0169] The calculation example is as follows:

[0170] Assumptions:

[0171] The liquid volume m of the wastewater injected into the electrolytic cell calculated by the liquid inflow sensing unit 140 is 100, the temperature difference ΔT between the injected wastewater and the wastewater inside the electrolytic cell monitored by the temperature monitoring unit 120 is 10° C., and the surface area A of the wastewater in contact with the wastewater inside the electrolytic cell is 1;

[0172]

[0173] Based on the above assumptions, the time required for wastewater mixing is approximately 420 seconds;

[0174] The temperature of the mixed wastewater is calculated as follows:

[0175]

[0176] Among them, T 混合 is the temperature after the monitored wastewater volume and the wastewater volume injected into the electrolytic cell are mixed, m1 is the volume of wastewater injected into the electrolytic cell calculated by the liquid inflow sensing unit 140, m2 is the volume of wastewater inside the electrolytic cell, c is the specific heat capacity of the wastewater, usually c=4200, T1 is the initial temperature of the wastewater injected into the electrolytic cell, and T2 is the initial temperature of the wastewater in the electrolytic cell;

[0177] The mixing adjustment unit 420 is used to receive the wastewater temperature after the wastewater is mixed calculated by the mixed wastewater calculation unit 410, and output the wastewater temperature after the wastewater is mixed and the wastewater liquid volume inside the electrolytic cell monitored by the liquid volume monitoring unit 110 at this time to the current output unit 320, and the current output unit 320 calculates the current output signal after the wastewater purification unit 220 is adjusted to the mixing time;

[0178] The current signal reducing unit 430 is used to receive the mixed current output signal of the wastewater purification unit 220 calculated by the mixing regulating unit 420, and to calculate the difference between the mixed current output signal and the current signal output by the wastewater purification unit 220 at this time, and to receive the wastewater mixing time calculated by the mixed wastewater calculating unit 410, and to calculate the frequency of reducing the current signal output by the wastewater purification unit 220 during the wastewater mixing time;

[0179] The calculation formula is as follows:

[0180]

[0181] Wherein, A is the frequency at which the wastewater purification unit 220 reduces the output of the current signal during the wastewater mixing time, B is the current signal output by the wastewater purification unit 220 at this time, C is the current output signal of the wastewater purification unit 220 after mixing calculated by the mixing adjustment unit 420, and D is the wastewater mixing time calculated by the mixed wastewater calculation unit 410;

[0182] The current intensity regulating module 400 further includes a secondary regulating unit 440;

[0183] The secondary adjustment unit 440 is used to receive the mixed wastewater temperature calculated by the mixed wastewater calculation unit 410, and set the water temperature comparison threshold according to the mixed wastewater temperature, and then receive the water temperature monitored by the temperature monitoring unit 120, and compare the water temperature monitored by the temperature monitoring unit 120 with the water temperature comparison threshold. When the mixed water temperature is less than or equal to the water temperature comparison threshold, the current output unit 320 adjusts the current signal normally output by the wastewater purification unit 220;

[0184] The calculation formula is as follows:

[0185] The water temperature comparison threshold is set to 120% of the mixed wastewater temperature;

[0186] T 阈值 =T 混合 120%

[0187] If T 混合 ≤T 阈值 , the current signal of the wastewater purification unit 220 is adjusted through the current output unit 320;

[0188] Among them, T 阈值 To set the water temperature comparison threshold according to the mixed wastewater temperature, T 混合 The mixed wastewater temperature is calculated by the mixed wastewater calculation unit 410 .

[0189] The electrolytic cell monitoring module 100 monitors the wastewater liquid volume and the wastewater temperature in the electrolytic cell, and calculates the liquid volume of wastewater injected into the electrolytic cell during metal processing. The electrolytic cell wastewater and waste gas treatment module 200 compares the wastewater temperature monitored in the electrolytic cell monitoring module 100 with the set wastewater temperature treatment threshold. If the actual temperature inside the electrolytic cell is less than the wastewater temperature treatment threshold, the wastewater in the electrolytic cell is purified. The current intensity output module 300 calculates the adjustment coefficient of the output current signal in the electrolytic cell by the electrolytic cell wastewater and waste gas treatment module 200 through the wastewater liquid volume and wastewater temperature monitored by the electrolytic cell monitoring module 100, and adjusts the current output signal of the electrolytic cell wastewater and waste gas treatment module 200 according to the current signal adjustment coefficient.

[0190] The mixed wastewater calculation unit 410 predicts the mixing time when the injected wastewater reaches the same temperature as the wastewater inside the electrolytic cell according to the amount of wastewater injected into the electrolytic cell during metal processing and the monitored amount of wastewater, and calculates the temperature of the wastewater after the wastewater is mixed by the amount of wastewater monitored by the electrolytic cell monitoring module 100 and the amount of wastewater injected into the electrolytic cell. The mixing adjustment unit 420 outputs the wastewater temperature after the wastewater is mixed calculated by the mixed wastewater calculation unit 410 and the amount of wastewater inside the electrolytic cell monitored by the electrolytic cell monitoring module 100 at this time to the current output unit 320, calculates the current output signal of the electrolytic cell wastewater and exhaust gas treatment module 200 adjusted to the mixing time through the current intensity output module 300, and the current signal reduction unit 430 calculates the difference between the current output signal calculated by the mixing adjustment unit 420 and the normal current output signal of the electrolytic cell wastewater and exhaust gas treatment module 200, and calculates the frequency of reducing the current signal output by the electrolytic cell wastewater and exhaust gas treatment module 200 during the wastewater mixing time according to the difference.

[0191] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An energy-saving optimization system for waste gas and wastewater treatment, characterized in that: It comprises an electrolytic cell monitoring module (100), an electrolytic cell wastewater and waste gas purification module (200), a current intensity output module (300) and a current intensity adjustment module (400); The current intensity adjustment module (400) comprises a mixed wastewater calculation unit (410), a mixed adjustment unit (420) and a current signal reduction unit (430); The electrolytic cell monitoring module (100) monitors the wastewater liquid volume and the wastewater temperature in the electrolytic cell, and calculates the liquid volume of wastewater injected into the electrolytic cell during metal processing; the electrolytic cell wastewater and waste gas treatment module (200) compares the wastewater temperature monitored in the electrolytic cell monitoring module (100) with a set wastewater temperature treatment threshold value; if the actual temperature inside the electrolytic cell is less than the wastewater temperature treatment threshold value, the electrolytic cell wastewater and waste gas purification module (200) purifies the wastewater in the electrolytic cell; the current intensity output module (300) calculates the adjustment coefficient of the electrolytic cell wastewater and waste gas treatment module (200) for the output current signal in the electrolytic cell according to the wastewater liquid volume and wastewater temperature monitored by the electrolytic cell monitoring module (100), and adjusts the current output signal of the electrolytic cell wastewater and waste gas treatment module (200) according to the current signal adjustment coefficient; The mixed wastewater calculation unit (410) predicts the mixing time when the injected wastewater reaches the same temperature as the wastewater inside the electrolytic cell according to the amount of wastewater injected into the electrolytic cell during metal processing and the monitored amount of wastewater, and calculates the temperature of the wastewater after the wastewater is mixed according to the amount of wastewater monitored by the electrolytic cell monitoring module (100) and the amount of wastewater injected into the electrolytic cell. The mixing adjustment unit (420) compares the temperature of the wastewater after the wastewater is mixed calculated by the mixed wastewater calculation unit (410) with the temperature of the wastewater inside the electrolytic cell monitored by the electrolytic cell monitoring module (100) at this time. The amount of water is output to the current output unit (320), and the current output signal of the electrolytic cell wastewater and waste gas treatment module (200) after adjusting to the mixing time is calculated by the current intensity output module (300). The current signal reduction unit (430) calculates the difference between the current output signal calculated by the mixing adjustment unit (420) and the normal current output signal of the electrolytic cell wastewater and waste gas treatment module (200), and calculates the frequency of reducing the current signal output of the electrolytic cell wastewater and waste gas treatment module (200) during the wastewater mixing time based on the difference.

2. The energy-saving optimization system for waste gas and wastewater treatment according to claim 1 is characterized in that: The electrolytic cell monitoring module (100) is used to monitor the wastewater capacity in the electrolytic cell and the temperature of the wastewater in the electrolytic cell; The electrolytic cell monitoring module (100) comprises a liquid volume monitoring unit (110) and a temperature monitoring unit (120); The liquid volume monitoring unit (110) is used to transmit ultrasonic pulses through a transmitter, and then receive ultrasonic waves reflected from the liquid surface through a receiver, and finally monitor the wastewater level in the electrolytic cell by purifying the time difference between the transmitted and received signals, and then calculate the wastewater volume in the electrolytic cell according to the liquid level and the size of the electrolytic cell; The temperature monitoring unit (120) is used to form a closed loop in the electrolytic cell through two different metal conductors. If the temperatures of the two different metal conductors are different, an electromotive force proportional to the temperature difference will be generated in the loop of one of the metal conductors according to the thermoelectric effect. The electromotive force is transmitted to the measuring instrument through the junction box. Since there is a certain functional relationship between the electromotive force and the temperature, the electromotive force is converted into a temperature value through calculation and displayed.

3. The energy-saving optimization system for waste gas and wastewater treatment according to claim 1 is characterized in that: The electrolytic cell wastewater and waste gas purification module (200) comprises a threshold comparison unit (210) and a wastewater purification unit (220); The threshold comparison unit (210) is used to set a wastewater temperature purification threshold inside the electrolytic cell, receive the actual temperature inside the electrolytic cell monitored by the temperature monitoring unit (120), and compare the wastewater temperature purification threshold with the actual temperature inside the electrolytic cell. If the actual temperature inside the electrolytic cell is less than the wastewater temperature purification threshold, a comparison success signal is output to the wastewater purification unit (220); if the actual temperature inside the electrolytic cell is greater than or equal to the wastewater temperature purification threshold, the comparison is continued; The wastewater purification unit (220) is used to receive the comparison success signal output by the threshold comparison unit (210), and after receiving the signal, output a normal current signal. At this time, the anode and cathode inside the electrolytic cell are activated by the current signal. After the anode is activated, the wastewater inside the electrolytic cell undergoes an oxidation reaction with the anode, and the pollutants in the wastewater lose electrons and are oxidized. After the cathode is activated, a reduction reaction occurs, and the water is reduced to produce hydrogen and hydroxide ions, thereby purifying the wastewater in the electrolytic cell.

4. The energy-saving optimization system for waste gas and wastewater treatment according to claim 1 is characterized in that: The electrolytic cell wastewater and waste gas purification module (200) further includes (230); The waste gas purification unit (230) is used to receive a comparison success signal output from the threshold comparison unit (210). After receiving the signal, a high voltage is applied to a group of corona electrodes to ionize air molecules around the corona electrodes to form corona discharge. At this time, a large number of positive and negative ions are generated. When particles in the waste gas pass through the corona area, they collide with the ions and acquire electric charges. The charged particles then enter the electric field formed by another group of collecting electrodes. Due to the action of the electric field force, the charged particles are attracted to the surface of the dust collecting electrode and deposited, thereby being separated from the airflow, thereby purifying the waste gas during metal processing.

5. The energy-saving optimization system for waste gas and wastewater treatment according to claim 1 is characterized in that: The current intensity output module (300) comprises a current calculation unit (310) and a current output unit (320); The current calculation unit (310) is used to calculate the current signal adjustment coefficient of the wastewater purification unit (220) for purifying the wastewater in the electrolytic cell based on the wastewater liquid volume in the electrolytic cell monitored by the liquid volume monitoring unit (110) and the wastewater temperature in the electrolytic cell monitored by the temperature monitoring unit (120); When the temperature of the wastewater in the electrolytic cell is too high, the kinetic energy of the molecules in the wastewater will increase, the collision frequency and collision energy of the reactant molecules will increase, and the rate of the electrolytic reaction will be increased. At this time, the wastewater purification unit (220) can output a lower current to purify the wastewater. On the contrary, when the temperature is too low, the current output by the wastewater purification unit (220) needs to be increased. When the amount of wastewater in the electrolytic cell is too high, causing the electrodes of the wastewater purification unit (220) to be partially submerged, thus reducing the effective electrode area and lowering the electrolysis efficiency, the current output by the wastewater purification unit (220) should be increased. On the contrary, when the amount of wastewater is too low, the current output by the wastewater purification unit (220) needs to be increased. The current output unit (320) is used to receive the adjustment coefficient calculated in the current calculation unit (310), and adjust the current signal normally output in the wastewater purification unit (220) according to the adjustment coefficient, and then output the calculated current signal to the wastewater purification unit (220).

6. The energy-saving optimization system for waste gas and wastewater treatment according to claim 1 is characterized in that: The mixed wastewater calculation unit (410) is used to receive the liquid volume of wastewater injected into the electrolytic cell calculated by the liquid inflow sensing unit (140) and the liquid volume of wastewater monitored by the liquid volume monitoring unit (110); The mixing time required for the injected wastewater and the wastewater inside the electrolytic cell to reach the same temperature is predicted based on the amount of wastewater injected into the electrolytic cell, and the time required for mixing is estimated by calculating the temperature difference between the amount of wastewater injected into the electrolytic cell and the wastewater inside the electrolytic cell, as well as the heat exchange coefficient between the two; The temperature of the wastewater after mixing is calculated based on the monitored wastewater volume and the volume of wastewater injected into the electrolytic cell. During the mixing process, the wastewater exchanges heat with the wastewater inside the electrolytic cell and eventually reaches a new equilibrium temperature. This process predicts the temperature after mixing by calculating the heat change of the wastewater. The mixing adjustment unit (420) is used to receive the wastewater temperature after the wastewater is mixed calculated by the mixed wastewater calculation unit (410), and output the wastewater temperature after the wastewater is mixed and the wastewater liquid volume inside the electrolytic cell monitored by the liquid volume monitoring unit (110) at this time to the current output unit (320), and the current output unit (320) calculates the current output signal of the wastewater purification unit (220) adjusted to the mixing time; The current signal reducing unit (430) is used to receive the mixed current output signal of the wastewater purification unit (220) calculated by the mixing adjustment unit (420), and to calculate the difference between the mixed current output signal and the current signal output by the wastewater purification unit (220) at this time, and to receive the wastewater mixing time calculated by the mixed wastewater calculation unit (410), and to calculate the frequency of reducing the current signal output by the wastewater purification unit (220) during the wastewater mixing time.

7. The energy-saving optimization system for waste gas and wastewater treatment according to claim 1 is characterized in that: The electrolytic cell monitoring module (100) further includes a metal calculation unit (130); The metal calculation unit (130) is used to receive the current signal output frequency in the wastewater purification unit (220), and analyze the amount of wastewater in the electrolytic cell after being purified by the wastewater purification unit (220) under an ideal state according to the current output frequency, and receive the amount of wastewater after being purified by the wastewater purification unit (220) monitored by the liquid volume monitoring unit (110), and then compare the two to calculate the metal content in the wastewater in the electrolytic cell.

8. The energy-saving optimization system for waste gas and wastewater treatment according to claim 1 is characterized in that: The electrolytic cell monitoring module (100) further includes a liquid inflow sensing unit (140); The liquid inflow sensing unit (140) is used to receive the current signal output by the wastewater purification unit (220), and monitor the pressure change inside the electrolytic cell in real time. When new wastewater is injected into the electrolytic cell, the pressure change inside the electrolytic cell is recorded until the pressure disappears. At this time, the amount of wastewater injected into the electrolytic cell is calculated by monitoring the difference in pressure change and the internal size of the electrolytic cell.

9. The energy-saving optimization system for waste gas and wastewater treatment according to claim 1 is characterized in that: The current intensity adjustment module (400) further includes a secondary adjustment unit (440); The secondary adjustment unit (440) is used to receive the mixed wastewater temperature calculated by the mixed wastewater calculation unit (410), set a water temperature comparison threshold value according to the mixed wastewater temperature, and then receive the water temperature monitored by the temperature monitoring unit (120), compare the water temperature monitored by the temperature monitoring unit (120) with the water temperature comparison threshold value, and when the mixed water temperature is less than or equal to the water temperature comparison threshold value, the current output unit (320) adjusts the current signal normally output by the wastewater purification unit (220).

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