CN104478118A - Intelligent catalytic oxidation waste water treatment device - Google Patents

Abstract

The invention discloses an intelligent catalytic oxidation wastewater treatment device, which comprises a catalytic oxidation reactor and an intelligent control device. The intelligent control device includes: a central processing unit, first to fourth control units, a dosing device, the first pH online monitor, the second pH online monitor, the redox potential online monitor and the flow The current detector; the dosing device includes first to fifth liquid storage barrels; the catalytic oxidation reactor is provided with first to fifth dosing ports and gas discharge ports, and the first pH online monitor is opposite to the first dosing port, The second pH on-line monitor is opposite to the fourth dosing port, the oxidation-reduction potential on-line monitor is located between the third dosing port and the gas discharge port, the flow current detector is opposite to the fifth dosing port, and each liquid storage tank passes through The conduits are in communication with a corresponding dosing port, each conduit is equipped with a flowmeter, each flowmeter is connected with each corresponding control unit, and each control unit is respectively connected with the central processing unit.

Description

An intelligent catalytic oxidation wastewater treatment device

technical field

The invention relates to an intelligent and continuous treatment device for various waste water, in particular to an intelligent catalytic oxidation waste water treatment device, which belongs to the technical field of environmental protection.

Background technique

With the rapid development of my country's economy, textile, printing and dyeing, papermaking, petrochemical, coking, pharmaceutical and other industries have developed rapidly, followed by a corresponding increase in various wastewater containing a large number of refractory organic pollutants, and the biotoxicity of wastewater Strong, after the traditional physical and chemical treatment + biochemical treatment, the concentration of organic matter in the effluent is still high. In recent years, with the strengthening of environmental protection in our country, the discharge standards for various waste water have been continuously improved, and there are relevant regulations on the reuse rate of reclaimed water in various enterprises. Therefore, advanced treatment of waste water is required to further reduce output The concentration of pollutants in water is particularly important.

At present, advanced wastewater treatment technologies at home and abroad mainly include activated carbon adsorption, coagulation sedimentation, membrane separation, ozone oxidation, wet oxidation and Fenton oxidation (including Fenton-like oxidation), among which Fenton oxidation is considered to be the most effective, Simple and economical method.

The traditional Fenton oxidation technology has disadvantages such as complex chemical dosing, high manual operation cost, large floor space, and low operating efficiency. Therefore, in order to overcome the defects of traditional technology and continuously improve and perfect the Fenton oxidation technology, researchers focus on On the improvement of Fenton oxidation reaction system.

How to make the treatment method simpler, more efficient and less costly by improving the process or improving the treatment equipment on the basis of the existing wastewater advanced treatment technology has become an urgent problem to be solved in this field.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art and provide a wastewater treatment device with simple structure, low investment, low operating cost, high degree of automation, small footprint and stable water output.

In order to achieve the above object, the technical solution adopted by the present invention is: the intelligent catalytic oxidation wastewater treatment device of the present invention includes a catalytic oxidation reactor and an intelligent control device; a sixth flow meter is installed at the sewage inlet of the catalytic oxidation reactor, so that The intelligent control device includes a central processing unit, first to fourth control units, a first pH online monitor, a second pH online monitor, an oxidation-reduction potential online monitor, a flow current detector, and a dosing device. A control unit is electrically connected to the first pH online monitor, the second control unit is electrically connected to the redox potential online monitor, the third control unit is electrically connected to the second pH online monitor, and the fourth control unit is connected to the streaming current detector Electrically connected, the dosing device includes first to fifth liquid storage barrels; the catalytic oxidation reactor is sequentially provided with first to third dosing ports, a gas discharge port, a fourth to the fifth dosing port; the first liquid storage tank communicates with the first dosing port through the first conduit, the second liquid storage tank communicates with the second dosing port through the second conduit, and the third liquid storage tank communicates with the second dosing port through the second The third conduit communicates with the third dosing port, the fourth liquid storage tank communicates with the fourth dosing port through the fourth conduit, and the fifth liquid storage tank communicates with the fifth dosing port through the fifth conduit; the first pH online monitor , the second pH online monitor, the oxidation-reduction potential online monitor, and the flow current detector are installed at the bottom of the catalytic oxidation reactor, wherein the first pH online monitor is opposite to the first dosing port, and the second pH online monitor Opposite to the fourth dosing port, the oxidation-reduction potential on-line monitor is located between the third dosing port and the gas discharge port, and the flow current detector is opposite to the fifth dosing port; The first to fifth flowmeters are installed, the first control unit is electrically connected to the first flowmeter, the second control unit is electrically connected to the second and third flowmeters at the same time, the third control unit is electrically connected to the fourth flowmeter, The fourth control unit is electrically connected to the fifth flowmeter, and the first to fourth control units are respectively electrically connected to the central processing unit.

Further, in the present invention, when the catalytic oxidation reactor operates continuously, the online monitoring data obtained by the first pH online monitor, the second pH online monitor, the oxidation-reduction potential online monitor and the flow current detector are immediately sent back to each corresponding control unit, and compare it with the corresponding parameter range preset in the control unit, wherein, the parameter range preset by the first control unit is between pH 4-5, and the preset parameter range of the second control unit is The parameter range of the redox potential is greater than 400mV, the preset parameter range of the third control unit is between pH 7.5-8.5, and the preset parameter range of the fourth control unit is the flowing current between -0.5-0.2SCU When the online monitoring data is not within the preset corresponding parameter range, the corresponding control unit adjusts the dosage of the corresponding agent by regulating the flow meter connected to it, so that each online monitoring data is within the preset within the parameters.

Further, inorganic acid is stored in the first liquid storage tank of the present invention, iron salt or ferrous salt solution is stored in the second liquid storage tank, hydrogen peroxide is stored in the third liquid storage tank, and hydrogen peroxide is stored in the fourth liquid storage tank. Alkali solution is stored, and flocculant is stored in the fifth liquid storage tank.

Further, in the catalytic oxidation reactor of the present invention, agitators are respectively installed at each dosing port, between adjacent dosing ports, and between the gas discharge port and the dosing port adjacent to it There are baffles respectively between them.

Further, a low liquid level sensor is provided in each of the first to fifth liquid storage barrels of the present invention, and each of the low liquid level sensors is respectively connected to the central processing unit through a signal line.

Further, the present invention also includes a sedimentation tank, the inlet of the sedimentation tank communicates with the sewage outlet of the catalytic oxidation reactor.

Further, the intelligent control device of the present invention also includes a fifth control unit and a total organic carbon online monitor electrically connected to each other, the total organic carbon online monitor is fixedly installed in the sedimentation tank, and the fifth control unit also simultaneously It is electrically connected with the central processing unit and the second control unit.

Further, in the present invention, when the online monitoring data obtained by the total organic carbon online monitor is greater than 15 mg/L, the fifth control unit instructs the second control unit to adjust the flow of the second flowmeter and the third flowmeter to increase the flow rate of the corresponding medicament. The dosage is such that the online monitoring data obtained by the total organic carbon online monitor is less than or equal to 15mg/L.

Further, the central processing unit and each control unit of the present invention are single-chip microprocessors or PLC programmable controllers.

Compared with the prior art, the present invention has the advantages of:

(1) The present invention sets online monitors at different monitoring nodes of the catalytic oxidation reactor, and the monitoring indicators include pH value, ORP (Oxidation-Reduction Potential, redox potential), SC (Streaming Current, streaming current), TOC (Total Organic Carbon, total organic carbon), etc. The monitoring data of each online monitor is sent back to each control unit in real time, and compared with the preset parameters in the control unit, the dosage of the agent is adjusted in real time to optimize the operating conditions of the system and completely solve the problem of manual dosing. The drawbacks, greatly reducing management costs.

(2) The present invention first adopts the integrated catalytic oxidation reactor as the main reaction site of wastewater treatment, to ensure that each link of wastewater treatment is carried out in one reactor, realize continuous treatment of wastewater, effectively reduce site and space occupation, and The mixing effect is enhanced, the reaction efficiency is improved, and the equipment investment is reduced by installing a stirrer at each dosing port.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the present invention.

In the figure, 1—catalytic oxidation reactor; 11—sewage inlet; 12—sewage outlet; 131—the first dosing port; 132—the second dosing port; 133—the third dosing port; 134—the fourth dosing port 135—fifth dosing port; 141—gas discharge port; 142—blower; 15—stirrer; 161—first baffle; 162—second baffle; 163—third baffle; 164—fourth Baffle; 165—fifth baffle; 166—sixth baffle; 2—sedimentation tank; 21—drain pipe; 22—sludge discharge pipe; 3—intelligent control device; 31—central processing unit; 32—control unit; 3211—the first control unit; 3212—the second control unit; 3213—the third control unit; 3214—the fourth control unit; 3215—the fifth control unit; 3221—the first pH online monitor; 3222—on-line redox potential Monitor; 3223—second pH online monitor; 3224—flow current detector; 3225—total organic carbon online monitor; 331—first flow meter; 332—second flow meter; 333—third flow meter; 334 —Fourth flowmeter; 335—Fifth flowmeter; 336—Sixth flowmeter; 341—Bottom pipe; 3421—First conduit; 3422—Second conduit; 3423—Third conduit; 3424—Fourth conduit; 3425—fifth conduit; 351—first liquid storage barrel; 352—second liquid storage barrel; 353—third liquid storage barrel; 354—fourth liquid storage barrel; 355—fifth liquid storage barrel; 36—sealing cover ; 371—low liquid level sensor; 372—signal line; 4—computer in office area.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are only used to explain the present invention, and are not used to limit the protection scope of the present invention.

As shown in FIG. 1 , the intelligent catalytic oxidation wastewater treatment device of the present invention mainly includes a catalytic oxidation reactor 1 and an intelligent control device 3 . The intelligent control device 3 includes a central processing unit, first to fifth control units, a first pH online monitor, a second pH online monitor, an oxidation-reduction potential online monitor, a flow current detector, a total organic carbon online monitor and The medicine adding device; the medicine adding device includes first to fifth liquid storage barrels.

In the structure shown in Fig. 1, the intelligent control device 3 is divided into two parts, inside and outside. The interior of the intelligent control device 3 is divided into upper and lower parts, wherein the upper part is fixed with the central processing unit 31, the first to fifth control units 3211-3215 and the first to fifth flow meters 331-335, and the lower part is placed with the first The first to fifth liquid storage barrels 351-355; the side of the casing of the intelligent control device 3 are provided with inlet holes for power lines and signal lines and openings for passing the first to fifth conduits 3421-3425. The catalytic oxidation reactor 1 is outside the intelligent control device 3 . As an external component of the intelligent control device 3, the first pH online monitor 3221, the second pH online monitor 3223, the redox potential online monitor 3222 and the flow current detector 3224 are fixedly installed on the inner wall of the catalytic oxidation reactor 1 , the total organic carbon online monitor 3225 is fixedly installed in the sedimentation tank 2. The first control unit 3211 is electrically connected to the first pH on-line monitor 3221, and the second control unit 3212 is electrically connected to the oxidation-reduction potential on-line monitor through the inlet holes for power lines and signal lines opened on the side of the shell of the intelligent control device 3 3222 is electrically connected, the third control unit 3213 is electrically connected to the second pH online monitor 3223, the fourth control unit 3214 is electrically connected to the flowing current detector 3224, the fifth control unit 3215 is electrically connected to the total organic carbon online monitor 3225, The first to fifth control units 3211-3215 are electrically connected to the central processing unit 31, respectively. The first to fifth flowmeters 331-335 are installed on the first to fifth conduits 3421-3425 in one-to-one correspondence, the first control unit 3211 is electrically connected to the first flowmeter 331, and the second control unit 3212 is simultaneously connected to the second The flowmeter 332 and the third flowmeter 333 are electrically connected, the third control unit 3213 is electrically connected to the fourth flowmeter 334, the fourth control unit 3214 is electrically connected to the fifth flowmeter 335, and the fifth control unit 3215 is electrically connected to the second control unit 3212 electrical connections.

The first to fifth liquid storage barrels 351-355 in the dosing device are all dedicated PE material dosing barrels with good corrosion resistance and high strength. Among them, the acid solution for adjusting the pH is stored in the first liquid storage tank, the main reaction agent is stored in the second to third liquid storage tanks, the alkali solution for adjusting the pH is stored in the fourth liquid storage tank, and the fifth storage tank Subsequent reaction medicaments are stored in the liquid barrel. Usually, the main reaction agent includes a catalyst and an oxidizing agent; the follow-up reaction agent is usually an agent that can make the small particles generated in the main reaction form flocs so that they can be precipitated in the sedimentation tank, such as flocculants and the like. Specifically, as a preferred embodiment of the present invention, sulfuric acid is stored in the first liquid storage tank 351, ferrous sulfate solution is stored in the second liquid storage tank 352, and ferrous sulfate solution is stored in the third liquid storage tank 353. For hydrogen peroxide, sodium hydroxide solution is stored in the fourth liquid storage tank 354 , and flocculant is stored in the fifth liquid storage tank 355 . The tops of the first to fifth liquid storage barrels 351-355 have moderately sized drug inlets, and the drug inlets are covered and sealed with a sealing cover 36 when the drug is not needed, so as to reduce the volatilization of the medicament. The top of 36 has medicine extraction hole. The bottom extraction tubes 341 connected with the first to fifth conduits 3421-3425 are correspondingly inserted into the first to fifth liquid storage barrels through the drug extraction holes. The bottoms of the first to fifth liquid storage barrels 351-355 are provided with sewage outlets to facilitate the cleaning of long-term deposited chemical deposits; the interiors of the first to fifth liquid storage barrels 351-355 are respectively equipped with low liquid level sensors 371 Each low liquid level sensor 371 is electrically connected to the central processing unit 31 through a signal line 372 respectively; each liquid storage barrel is provided with a liquid level observation window, and a liquid level scale line is provided on the liquid level observation window.

The catalytic oxidation reactor 1 is made of corrosion-resistant materials. As shown in FIG. 1 , the left end of the catalytic oxidation reactor 1 is provided with a sewage inlet 11 , which communicates with the sewage inlet pipe. A high-range flowmeter (ie, the sixth flowmeter 336 ) is installed on the sewage inlet pipe to control the inflow of sewage. The right end of the catalytic oxidation reactor 1 is provided with a sewage outlet 12 , and the sewage is treated by the catalytic oxidation reactor 1 and enters the sedimentation tank 2 through the sewage outlet 12 . As shown in Figure 1, first to third dosing ports 131- 133, gas discharge port 141, the fourth dosing port 134 and the fifth dosing port 135, so that the first to third dosing ports are at the front end of the gas discharge port, and the fourth and fifth dosing ports are at the front of the gas discharge port rear end. The first dosing port 131 communicates with the medicine pumping port of the first liquid storage barrel 351 through the first conduit 3421, the second medicine adding port 132 communicates with the medicine pumping port of the second liquid storage barrel 352 through the second conduit 3422, and the third The medicine feeding port 133 communicates with the medicine pumping port of the third liquid storage barrel 353 through the third conduit 3423, the fourth medicine adding port 134 communicates with the medicine pumping port of the fourth liquid storage barrel 354 through the fourth conduit 3424, and the fifth medicine adding port The port 135 communicates with the medicine pumping port of the fifth liquid storage barrel 355 through the fifth conduit 3425 . In the reaction chamber of the catalytic oxidation reactor 1, a stirrer 15 is installed at each dosing port to break up the medicament added from each dosing port so that it is evenly sprinkled on the sewage opposite to each dosing port. In the middle, the mixing effect of the medicine is enhanced, and the reaction efficiency is improved. It should be noted that the agitator 15 installed at each dosing port is not required to extend into the sewage. Referring to Fig. 1, first to sixth baffles 161-166 can be provided inside the reaction chamber of the catalytic oxidation reactor 1, wherein the first baffle 161 is arranged at the first dosing port 131 and the second dosing port 132 Between, the second baffle 162 is set between the second dosing port 132 and the third dosing port 133, the third baffle 163 and the fourth baffle 164 are set at the third dosing port 133 and the gas discharge port 141 Between, and the third baffle 163 is located at the front end of the fourth baffle 164, the fifth baffle 165 is located between the gas discharge port 141 and the fourth dosing port 134, the sixth baffle 166 is located at the fourth dosing Between the mouth 134 and the fifth feeding port 135. Setting the first to sixth baffles 161-166 can separate the medicaments added from each drug feeding port, so that the medicament entering from each drug feeding port is stirred separately by the respective agitator 15 without being in the Mixing with each other during the stirring process, so as to avoid that the chemicals entering from each dosing port are mixed before being mixed with the sewage. Of course, if the distance between each dosing port is large enough, so that the medicine entering from each dosing port does not mix with the medicine entering the adjacent dosing port before mixing with the sewage, then, it is not necessary to Baffles are respectively arranged between the dosing ports and between the gas discharge port and the adjacent dosing ports. In the embodiment shown in Fig. 1, the area between the third dosing port 133 and the gas discharge port 141 is the main reaction zone of the catalytic oxidation reaction, and the previously added dosing from the second dosing port and the third dosing port Catalysts, oxidants and sewage fully react in the main reaction zone. The sewage treated in the main reaction area adjusts the pH value with the chemical agent added by the fourth drug inlet, and then reacts with the flocculant added by the fifth drug inlet to form flocs from the small particles generated during the reaction, so as to Allow it to settle down in the sedimentation tank. According to actual conditions, several agitators 15 may be fixedly installed in the main reaction zone of the catalytic oxidation reactor 1 . It should be noted that the agitator 15 installed in the main reaction zone protrudes into the sewage, so as to promote a sufficient reaction between the medicament and the sewage. The first pH online monitor 3221, the second pH online monitor 3222, the redox potential online monitor 3223, and the flow current detector 3224 are installed at the bottom of the reaction chamber of the catalytic oxidation reactor 1; the blower 142 is installed in the catalytic oxidation reactor The outside of 1 communicates with the reaction chamber of catalytic oxidation reactor 1 through the blast pipe. Referring to Fig. 1, the first pH on-line monitor 3221 is installed on the left side of the lower end of the first baffle 161, so that the first pH on-line monitor 3221 is opposite to the first dosing port; the oxidation-reduction potential on-line detector 3222 is installed on The position of the lower end of the fourth baffle 164 is on the left, so that the redox potential on-line detector 3222 is located in the main reaction zone; the second pH on-line monitor 3223 is installed on the left of the lower end of the sixth baffle 166, so that the second The pH online monitor 3223 is opposite to the fourth dosing port 134; the flowing current detector 3224 is installed at the bottom of the reaction chamber of the catalytic oxidation reactor 1, and is positioned at the end (i.e. the right end) of the catalytic oxidation reactor 1, so that the flowing current The detector 3224 is opposite to the fifth injection port 135 . A sedimentation tank 2 is arranged beside the catalytic oxidation reactor 1 , and the sewage outlet 12 of the catalytic oxidation reactor 1 communicates with the inlet of the sedimentation tank 2 . Total organic carbon online monitor 3225 is installed in sedimentation tank 2.

The first to fifth control units are single-chip microprocessors or PLC programmable controllers. Each of the first to fifth control units presets appropriate operating parameters, wherein the preset parameter range of the first control unit 3211 is between pH 4-5, and the preset parameter range of the second control unit 3212 The range is redox potential greater than 400mV, the preset parameter range of the third control unit 3213 is between pH 7.5-8.5, and the preset parameter range of the fourth control unit 3214 is the flowing current between -0.5-0.2SCU During this period, the preset parameter range of the fifth control unit 3215 is that the total organic carbon is less than or equal to 15 mg/L. The first to fifth control units 3211-3215 adjust the dosing amount of the medicament by regulating the corresponding flow meters connected thereto, so that each online monitoring data is within a preset parameter range. The first to fifth control units 3211-3215 are respectively connected to the central processing unit 31. The central processing unit 31 is a single-chip microprocessor or a PLC programmable controller, which can accurately and instantly remotely control the reaction process. The central processing unit 31 is connected to the computer 4 in the office area through the signal line 372, which is convenient for the staff to realize remote control.

Total organic carbon online monitor 3225 is installed in sedimentation tank 2. When the total organic carbon online monitor 3225 monitors online that the total organic carbon value in the sedimentation tank is within the preset range (that is, the total organic carbon is less than or equal to 15mg/L), the sewage in the sedimentation tank 2 is discharged through the drain pipe 21 into the surrounding water body to achieve standard discharge; when the total organic carbon online monitor 3225 online monitors that the total organic carbon value in the sedimentation tank is greater than 15mg/L, the fifth control unit 3215 instructs the second control unit 3212 to adjust the second flowmeter 332 and the flow rate of the third flowmeter 333 to increase the dosage of the corresponding medicament, so that the total organic carbon value monitored by the total organic carbon online monitor 3225 is less than or equal to 15 mg/L, and the emission up to the standard is realized. The sludge in the sedimentation tank 2 is discharged through the sludge discharge pipe 22 . As a preferred embodiment of the present invention, the catalytic oxidation reactor 1 is an integrated catalytic oxidation reactor composed of circular or S-shaped reciprocating serpentine pipes. Each agitator 15 in the catalytic oxidation reactor 1 can enhance the mixing effect and improve the reaction efficiency. The design of the catalytic oxidation reactor 1 is simple and smooth, and has the advantages of small footprint, sufficient hybrid power, and high degree of integration.

The usage method of the intelligent catalytic oxidation wastewater treatment device shown in Fig. 1 is further explained as follows:

(1) Turn on the sixth flow meter 336 installed on the sewage water inlet pipe, continuously transport the sewage to the catalytic oxidation reactor 1 at a certain flow rate, and start the flowmeter connected with the first to fifth liquid storage tanks 351-355 at the same time The first to fifth flowmeters 331 - 335 and the first pH online monitor 3221 , the second pH online monitor 3223 , the redox potential online monitor 3222 , and the flow current detector 3224 .

(2) The data monitored online by the first pH on-line monitor 3221, the second pH on-line monitor 3223, the redox potential on-line monitor 3222, and the flow current detector 3224 are correspondingly and immediately sent back to the connected first to The fourth control unit 3211-3214 is compared with the preset parameter range in each control unit, wherein the preset parameter range of the first control unit 3211 is between pH 4-5, and the second control unit The preset parameter range of 3212 is that the oxidation-reduction potential is greater than 400mV, the preset parameter range of the third control unit 3213 is that the pH value is between 7.5-8.5, and the preset parameter range of the fourth control unit 3214 is that the flowing current is between Between -0.5-0.2SCU. When the online monitoring data is not within the respective preset parameter ranges, the corresponding control unit will adjust the dosage of the medicine by adjusting the flow meter connected to it, wherein the first control unit 3211 is used to adjust the first The flow meter 331, the second control unit 3212 is used to regulate the second flow meter 332 and the third current flow meter 333, the third control unit 3213 is used to regulate the fourth flow meter 334, and the fourth control unit 3214 is used to regulate the fifth flow Meter 335, so that each online monitoring data is maintained within the preset parameter range.

(3) After the system runs for two hours, open the blower 142 outside the catalytic oxidation reactor 1, and the gas produced in the reaction process is blown out in time by the gas discharge port 141 on the upper part of the catalytic oxidation reactor 1, so as to ensure the smooth progress of the follow-up reaction.

(4) The effluent of the catalytic oxidation reactor 1 enters the sedimentation tank 2, and the total organic carbon online monitor 3225 is started at the same time, and the total organic carbon data monitored online is sent back to the fifth control unit 3215 immediately, and the fifth control unit 3215 is in advance. The set parameter range is compared: if the total organic carbon data of online monitoring is less than or equal to 15mg/L, the sewage in the sedimentation tank 2 can be discharged up to the standard through the drain pipe 21; if the total organic carbon data of online monitoring is greater than 15mg/L, Then the fifth control unit 3215 instructs the second control unit 3212 to adjust the flow of the second flow meter 332 and the third flow meter 333, increase the dosage of the medicament, so that the total organic carbon data monitored online is always less than or equal to 15mg/L, Achieve emission standards. The online monitoring data of total organic carbon online monitor 3225 is used as a water quality index of the final effluent.

Application Example 1:

The device of the present invention is applied to the biochemical effluent of the secondary sedimentation tank of a paper mill. The device of the present invention operates continuously for 24 hours, sewage enters the catalytic oxidation reactor 1 through the water inlet pipe, and the flow meter on the water inlet pipe is adjusted to control the water inlet to 20L/h, that is, the daily water treatment amount is 480L. The first to fifth control units 3211-3215 in the intelligent control device 3 adjust the dosage of medicine in real time according to the online monitoring data of each online monitoring instrument, so that the online monitoring data of each online monitoring instrument can be maintained at the preset parameters Within the threshold range, the effective treatment of sewage is guaranteed.

After the biochemical effluent from the secondary sedimentation tank of the paper mill is continuously operated and treated by the device of the present invention, the concentration of refractory organic pollutants in the sewage is significantly reduced, and the effluent quality is better. The running results are: pH of influent water is 6-9, COD (Chemical Oxygen Demand, chemical oxygen demand) 250-300mg/L, chromaticity 60-70PUC, pH of effluent water is 7-9, TOC<15mg/L (COD< 50mg/L), chromaticity<15PUC, COD removal rate reaches 80%, and chromaticity removal rate reaches 78%.

Application Example 2:

The device of the present invention is applied to the biochemical effluent of the secondary sedimentation tank of a certain urban sewage treatment plant mainly producing printing and dyeing wastewater. The device of the present invention runs continuously for 24 hours, sewage enters the catalytic oxidation reactor 1 through the water inlet pipe, and the flowmeter on the water inlet pipe is adjusted to control the water inlet to 20L/h, that is, the daily water treatment amount is 480L. The first to fifth control units 3211-3215 in the intelligent control device 3 adjust the dosage of medicine in real time according to the online monitoring data of each online monitoring instrument, so that the online monitoring data of each online monitoring instrument can be maintained at the preset parameters Within the threshold range, the effective treatment of sewage is guaranteed.

After the biochemical effluent of the secondary sedimentation tank of the urban sewage treatment plant is continuously operated and treated by the device, the effluent water quality is significantly improved compared with the influent water quality, and the device operates stably. The main water quality parameters of the influent and effluent water are shown in the table below.

To sum up, it can be seen that using the device of the present invention to further treat the wastewater of this plant, the COD removal rate can reach 55%, the chroma removal rate can reach 80%, and other water quality parameters include conductivity, TDS, hardness, Ca ²⁺ , Fe ²⁺ , Fe ³⁺ has different degrees of decline compared with the influent water, and the effluent water quality is better, reaching the national first-class A standard discharge standard.

Claims (9)

1. an intelligent catalyzed oxidation wastewater treatment equipment, is characterized in that: comprise catalyst oxidation reactor and intelligent controlling device, at the wastewater inlet place of catalyst oxidation reactor, the 6th under meter is installed, described intelligent controlling device comprises central processing unit, first to fourth control unit, one pH on-line computing model, 2nd pH on-line computing model, redox potential on-line computing model, streaming current detector and chemicals dosing plant, described first control unit is electrically connected with a pH on-line computing model, second control unit is electrically connected with redox potential on-line computing model, 3rd control unit is electrically connected with the 2nd pH on-line computing model, 4th control unit is electrically connected with streaming current detector, described chemicals dosing plant comprises the first to the 5th liquid storing barrel, described catalyst oxidation reactor is along being provided with the first to the 3rd dosing mouth, gas discharge outlet, the 4th to the 5th dosing mouth successively by adterminal direction, its front end, described first liquid storing barrel is communicated with the first dosing mouth by the first conduit, second liquid storing barrel is communicated with the second dosing mouth by the second conduit, 3rd liquid storing barrel is communicated with the 3rd dosing mouth by the 3rd conduit, 4th liquid storing barrel is communicated with the 4th dosing mouth by the 4th conduit, and the 5th liquid storing barrel is communicated with the 5th dosing mouth by the 5th conduit, one pH on-line computing model, the 2nd pH on-line computing model, redox potential on-line computing model, streaming current detector are installed on the bottom of catalyst oxidation reactor, wherein, one pH on-line computing model is relative with the first dosing mouth, 2nd pH on-line computing model is relative with the 4th dosing mouth, redox potential on-line computing model is the 3rd between dosing mouth and gas discharge outlet, and streaming current detector is relative with the 5th dosing mouth, first conduit to the 5th conduit is provided with the first to the 5th under meter separately accordingly, first control unit is electrically connected with first-class gauge, second control unit is electrically connected with second, third under meter simultaneously, 3rd control unit is electrically connected with the 4th under meter, 4th control unit is electrically connected with the 5th under meter, and first to fourth control unit is electrically connected with central processing unit respectively.

2. the intelligent catalyzed oxidation wastewater treatment equipment of one according to claim 1, it is characterized in that: when catalyst oxidation reactor runs continuously, one pH on-line computing model, 2nd pH on-line computing model, the online monitoring data that redox potential on-line computing model and streaming current detector obtain is back to each corresponding control unit immediately, and compare to corresponding parameter area pre-set in control unit, wherein, the parameter area that first control unit presets is that pH value is between 4-5, the parameter area that second control unit presets is that redox potential is greater than 400mV, the parameter area that 3rd control unit presets is that pH value is between 7.5-8.5, the parameter area that 4th control unit presets is that streaming current is between-0.5-0.2SCU, when online monitoring data is not in the corresponding parameter area preset, corresponding control unit regulates the dosage of corresponding medicament, to make each online monitoring data in the parameter area preset by the under meter regulating and controlling to be attached thereto.

3. the intelligent catalyzed oxidation wastewater treatment equipment of one according to claim 1 and 2, it is characterized in that: in described first liquid storing barrel, store mineral acid, molysite or ferrous salt solution is stored in second liquid storing barrel, hydrogen peroxide is stored in 3rd liquid storing barrel, store alkaline solution in 4th liquid storing barrel, in the 5th liquid storing barrel, store flocculation agent.

4. the intelligent catalyzed oxidation wastewater treatment equipment of one according to any one of claim 1 to 3, it is characterized in that: in described catalyst oxidation reactor, be separately installed with agitator at each dosing mouth place, between adjacent dosing mouth and between gas discharge outlet and the dosing mouth adjacent with it, be respectively equipped with baffle plate.

5. the intelligent catalyzed oxidation wastewater treatment equipment of one according to any one of claim 1 to 4, it is characterized in that: be respectively provided with a low liquid level sensor in the described first to the 5th liquid storing barrel, each described low liquid level sensor is connected with central processing unit respectively by signal wire.

6. the intelligent catalyzed oxidation wastewater treatment equipment of one according to any one of claim 1 to 5, it is characterized in that: also comprise settling tank, the import of described settling tank is communicated with the sewage outlet of catalyst oxidation reactor.

7. the intelligent catalyzed oxidation wastewater treatment equipment of one according to claim 6, it is characterized in that: described intelligent controlling device also comprises the 5th control unit and the total organic carbon (TOC) on-line monitor be electrically connected to each other, described total organic carbon (TOC) on-line monitor is fixedly mounted in settling tank, and described 5th control unit is also electrically connected with central processing unit and the second control unit simultaneously.

8. the intelligent catalyzed oxidation wastewater treatment equipment of one according to claim 7, it is characterized in that: when the online monitoring data that total organic carbon (TOC) on-line monitor obtains is greater than 15mg/L, 5th control unit instruction second control unit regulates the flow of second gauge and the 3rd under meter to increase the dosage of corresponding medicament, and the online monitoring data that total organic carbon (TOC) on-line monitor is obtained is less than or equal to 15mg/L.

9. the intelligent catalyzed oxidation wastewater treatment equipment of one according to any one of claim 1 to 8, is characterized in that: described central processing unit and each control unit are singlechip microprocessor or PLC.