A printing and dyeing wastewater treatment system

Abstract

The present invention relates to the technical field of wastewater treatment, and specifically discloses a printing and dyeing wastewater treatment system, which includes an industrial camera one and an industrial camera two arranged in the printing and dyeing wastewater flow path. The low-chromaticity color block group is a decolorization reference module. The conditioning module includes a turbulence generator and an activated carbon adsorption dispenser. The turbulence generator forms an obstacle block in the flow path and forms turbulence behind the obstacle block. The activated carbon adsorption dispenser puts activated carbon into the turbulence area formed by the turbulence generator; the turbulence generator and the activated carbon adsorption dispenser are controlled by the control parameters corresponding to the color blocks. Within a fixed flow path travel, dynamic adjustment of high-chromaticity waste liquid is realized. The control method is simplified, and at the same time, the chromaticity pre-reduction operation of high-chromaticity waste liquid is realized. In the subsequent treatment, the low-chromaticity waste liquid is shunted, and the chromaticity corresponds to the decolorizing agent dosing module, realizing the coupling of the decolorizing agent process and the activated carbon process. The decolorizing agent responds to the variability of the waste liquid chromaticity with relatively fixed parameters.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a printing and dyeing wastewater treatment system. Background Art

[0002] In the field of printing and dyeing, dyeing wastewater has high chroma and strong biological toxicity. The first step is to remove the chroma of the printing and dyeing wastewater. The article "Research on Disperse Dyeing Wastewater Reuse Treatment Technology" describes the dosage mechanism of the decolorizer. "In the coagulation treatment of dyeing wastewater, appropriately increasing the dosage of the decolorizer can significantly increase the decolorization rate of the dye. This is because the decolorizer can provide more adsorption sites and enhance the flocculation and sedimentation effects. However, if the dosage of the decolorizer is too much, it may have the opposite effect and reduce the decolorization rate instead."

[0003] By conducting experiments on wastewater with different chromaticities, we can obtain the optimal chromaticity range, temperature range, pH range and the corresponding decolorizing agent ratio, so as to ensure that the decolorizing agent is always used efficiently. This can not only improve the chromaticity removal efficiency, but also reduce the amount of decolorizing agent used, thereby reducing costs.

[0004] There are still restrictions on the use of existing decolorizers. For example, the cationic dye-specific decolorizer CW-17 developed by Yixing Qingtai Purifying Agent Co., Ltd. is suitable for low-chroma wastewater treatment. Different types of decolorizers have different applicable chromaticities and different operating requirements. The printing and dyeing production line has many steps and processes, and the amount of waste liquid generated in different processes is different. At the same time, there are many problems in the processing process, so there is no way to ensure the chromaticity uniformity of printing and dyeing wastewater. However, due to the excessive use of decolorizers, the effect is counterproductive. At the same time, when the waste liquid is uneven, it is necessary to prepare decolorizers with different chromaticities. Due to the diversity of the chromaticity of the waste liquid, when the uniform chromaticity is temporarily stored in the wastewater area, the continuous multi-chromaticity water supply causes the chromaticity to be variable and increases the retention time. In the process of continuous multi-chromaticity wastewater treatment, the chromaticity of the wastewater is difficult to match the optimal decolorization chromaticity of the decolorizer. The cost of wastewater treatment operation is increased, and the operation is not convenient.

[0005] Activated carbon is suitable for pre-reduction treatment of chromaticity of wastewater with various chromaticities. Activated carbon is not suitable for large-scale treatment because it needs to be analyzed and reused. In the continuous wastewater flow channel, if the activated carbon has a small particle size and a large specific surface area, it provides more adsorption sites, which is convenient for rapid color reduction. The solid impurities in the wastewater are mixed with the activated carbon particles. During the activated carbon filtration and capture process, a large amount of solid impurities will be mixed in, which is not conducive to reuse and analysis. Large-particle activated carbon or specially shaped activated carbon processed by molding is convenient for collection and analysis, but the specific surface area is small. When the flow channel length is constant, there will be problems of non-adsorption saturation. Summary of the invention

[0006] The object of the present invention is to provide a printing and dyeing wastewater treatment system, which obtains the closest chromaticity block by gray-scale difference, uses the chromaticity block to distinguish control parameters, realizes dynamic pre-decolorization of activated carbon, high-chromaticity reflux dilution and re-decolorization, and fixed-parameter decolorization of low-chromaticity shunt decolorizing agent, so as to couple the pretreatment of activated carbon with the directional treatment of the decolorizing agent with fixed parameters, thereby solving the problem of unevenness of waste liquid generation by the decolorizing agent and solving the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A printing and dyeing wastewater treatment system includes an industrial camera one and an industrial camera two arranged in the printing and dyeing wastewater flow path. The collection lens ends of the industrial camera one and the industrial camera two are both provided with a same-color gradient chromaticity multi-color block auxiliary sheet. Each color block is provided with a groove in the middle. Among them, several color blocks are divided into two groups. The low-chromaticity color block group is a decolorization reference module, and the high-chromaticity color block is a conditioning reference module. The gray-scale difference selection and regulation module converts the image into a gray-scale image according to the image information collected by the industrial camera one and the industrial camera two. The gray-scale difference selection and regulation module determines the corresponding color block based on the lowest difference between the gray-scale value of the waste liquid color area and the gray-scale value of the multi-color block. Each color block corresponds to the conditioning intensity of the conditioning module or the flow direction of the wastewater. The conditioning module includes a turbulence generator and an activated carbon adsorption dispenser. The turbulence generator forms an obstacle block in the flow path and forms turbulence behind the obstacle block. The activated carbon adsorption dispenser puts activated carbon into the turbulence area formed by the turbulence generator. The conditioning intensity parameters corresponding to each high-chromaticity color block include the number of obstacle blocks of the turbulence generator and the number of dispensations of the activated carbon adsorption dispenser, and the number of obstacle blocks and the number of dispensations increase synchronously with the increase of chromaticity.

[0009] As a further scheme of the present invention: the industrial camera two collects the chromaticity of the waste liquid after conditioning. The gray-scale difference selection and regulation module monitors whether the chromaticity of the waste liquid reaches the low-chromaticity color block group area. After the gray-scale difference selection and regulation module monitors that the chromaticity of the waste liquid does not meet the standard, it controls the waste liquid mixed with activated carbon to flow back. The low-chromaticity waste liquid is mixed with the original chromaticity waste liquid to reduce chromaticity. The industrial camera one continues to detect, and controls the conditioning module to treat the waste liquid through the gray-scale difference selection and regulation module.

[0010] As a further scheme of the present invention: an activated carbon supplementary dispenser is arranged between the activated carbon adsorption dispenser and the industrial camera two. The activated carbon supplementary dispenser takes the increased flow value detected by the flow monitor in the flow path as a reference and controls the activated carbon supplementary dispenser to supplement and dispense activated carbon. When the waste liquid image information collected by the industrial camera two reaches within the low-chromaticity color block group, the waste liquid flows into the subsequent flow path.

[0011] As a further solution of the present invention: a liquid storage and impurity filtering tank and a liquid transporter are successively arranged behind the industrial camera II, so that the wastewater of the low-chromaticity color block group enters the liquid storage and impurity filtering tank to remove activated carbon, and after the waste liquid accumulates, a liquid level height that meets the working requirements of the liquid transporter is generated.

[0012] As a further solution of the present invention: the liquid transporter, according to the image information collected by the industrial camera II, obtains the color block with the closest accurate gray value difference through the gray difference selection and regulation module, and the liquid transporter controls the waste liquid in the liquid storage and impurity filtering tank to enter the decolorization flow channels corresponding to the color blocks in multiple decolorization flow channels at a constant flow rate. The decolorizing agent dosing module performs secondary decolorization on the low-chromaticity waste liquid, and the waste liquid after decolorization enters the decolorized waste liquid homogenization tank for homogenization, and the waste liquid after homogenization meets the quality requirements of the biochemical treatment waste liquid.

[0013] As a further solution of the present invention: the gray value of the waste liquid image is located at the intermediate value between the gray values of two color blocks, and the gray difference selection and regulation module preferentially selects the high-chromaticity color block.

[0014] As a further solution of the present invention: an industrial camera III is added in the liquid storage and impurity filtering tank for image acquisition, and the industrial camera III is equipped with a same-color gradient multi-color block auxiliary sheet. The gray difference selection and regulation module combines the same-color gradient multi-color block auxiliary sheet to detect and obtain the closest low-chromaticity color block, and the wastewater is discharged according to the decolorization flow channels corresponding to the low-chromaticity color blocks.

[0015] As a further solution of the present invention: the shape of the obstacle of the turbulence generator is selected as a cylinder, and the water flow contacts the circumferential surface of the cylinder.

[0016] As a further solution of the present invention: the activated carbon put by the activated carbon adsorbent dispenser is fixed in the form of threading a rope, and at least three activated carbons are in a group.

[0017] As a further solution of the present invention: in a group of activated carbons, a floating block is fixed above the activated carbon at the top through a rope, and a weight block is fixed below the activated carbon at the bottom through a rope.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This technical solution uses the gray difference to obtain the closest color block, and uses the control parameters corresponding to the color block to control the turbulence generator and the activated carbon adsorbent dispenser. Within the fixed flow path, the dynamic adjustment of the high-chromaticity waste liquid is realized. The control method is simplified, and at the same time, the chromaticity pre-reduction operation of the high-chromaticity waste liquid is realized. In the subsequent treatment, the low-chromaticity waste liquid is shunted, the chromaticity corresponds to the decolorizing agent dosing module, the coupling of the decolorizing agent process and the activated carbon process is realized, and the decolorizing agent responds to the variability of the waste liquid chromaticity with relatively fixed parameters.

[0020] Based on the above advantages, the excessive color of the waste liquid results in the color after waste liquid treatment not meeting the expectation. The waste liquid with reduced color returns to the front flow channel in front of Industrial Camera 1. The waste liquid with reduced color is mixed with the previous waste liquid to dilute the color of the waste liquid, and the activated carbon further flows to fully adsorb; the waste liquid with excessive color is decolorized, and the color is continuously reduced by the adsorption of activated carbon during the flowing process; after secondary treatment, the color reaches the low-color block area, and subsequent operations are carried out. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a processing diagram of the gray difference selection and regulation module in a printing and dyeing wastewater treatment system;

[0023] Figure 2 It is a schematic diagram of a printing and dyeing wastewater treatment system;

[0024] Figure 3 It is a schematic diagram of the series connection of activated carbon in a printing and dyeing wastewater treatment system;

[0025] In the figure: 1. Industrial Camera 1; 11. Industrial Camera 2; 12. Industrial Camera 3; 2. Gray difference selection and regulation module; 3. Conditioning module; 31. Turbulence generator; 32. Activated carbon adsorption dispenser; 4. Activated carbon supplementary dispenser; 5. Flow monitor; 6. Liquid storage and impurity filtration tank; 7. Liquid transporter; 8. Decolorant dosing module; 9. Decolorized waste liquid homogenization tank. Detailed Embodiments

[0026] Please refer to Figures 1 - 3 : In this embodiment: It includes Industrial Camera 1 and Industrial Camera 2 arranged in the printing and dyeing wastewater flow channel. The acquisition lens ends of Industrial Camera 1 and Industrial Camera 2 are both provided with the same-color gradient color multi-block auxiliary sheets. Each block is provided with a groove in the middle. Among them, several blocks are divided into two groups. The low-color block group is the decolorization reference module, and the high-color block is the conditioning reference module; the gray difference selection and regulation module 2 converts the image into a grayscale image according to the image information collected by Industrial Camera 1 and Industrial Camera 2. The gray difference selection and regulation module 2 determines the corresponding block by the lowest difference between the gray value of the waste liquid color area and the gray value of the multi-block, and each block corresponds to the conditioning intensity or the wastewater flow direction of the conditioning module 3.

[0027] In this embodiment: Please refer to Figure 1, in this embodiment, the multi-color block auxiliary sheet with the same-color gradient is a single red color. In fact, there are many single colors such as red, green, yellow, and orange in printing and dyeing wastewater, but the color is adjusted according to the production situation, so the color of the discharged wastewater can be known. When in use, replace the multi-color block auxiliary sheet with the corresponding color. This technical solution uses 6 units of color blocks, including three low-chromaticity color blocks and three high-chromaticity color blocks. Each color block is provided with a groove in the middle. After shooting, the color of the liquid is located in the groove, and the central area of each color block is the liquid color block. When the image is converted into a grayscale image, according to the grayscale difference between the liquid color block and each color block, the grayscale of the closest color block is obtained. Each color block corresponds to the conditioning parameters of the conditioning module 3. The conditioning parameters of the conditioning module 3 include: the number of obstacles raised by the turbulence generator 31 and the dosing quantity of the activated carbon adsorbent dispenser 32. The advantage of using zones is to simplify control. Chromaticity affects the adjustment of the turbulence generator 31 and the activated carbon adsorbent dispenser 32.

[0028] The parameters after chromaticity analysis are too linear, and it is necessary to improve the adjustment accuracy of the turbulence generator 31 and the activated carbon adsorbent dispenser 32 and match the linear parameter output of the conditioning module 3. Although this method can improve the accuracy, the operation control cost increases. The purpose of reducing chromaticity is to make the waste liquid meet the requirements of subsequent biochemical treatment. Using color blocks can not only meet the use requirements but also reduce the complexity of the system and make it more stable. Increasing the number of color blocks can also improve the accuracy, and the specific situation can be adjusted according to the requirements.

[0029] In this embodiment: The conditioning module 3 includes a turbulence generator 31 and an activated carbon adsorbent dispenser 32. The turbulence generator 31 forms obstacle blocks in the flow channel and forms turbulence behind the obstacle blocks. The activated carbon adsorbent dispenser 32 puts activated carbon into the turbulence area formed by the turbulence generator 31. The conditioning intensity parameters corresponding to each high-chromaticity color block include the number of obstacles of the turbulence generator 31 and the dosing quantity of the activated carbon adsorbent dispenser 32, and the number of obstacles and the dosing quantity increase synchronously with the increase of chromaticity.

[0030] In this embodiment: The obstacle shape of the turbulence generator 31 is selected as a cylinder, and the water flow contacts the circumferential surface of the cylinder. The dyeing production line continuously generates wastewater, and the entire system has a channel structure. The waste liquid flows in the channel and goes to different wastewater treatment areas for treatment. Limited by the fluidity characteristics of the channel, the turbulence generator 31 is provided. The turbulence generator 31 has an up-and-down lifting structure. Under normal conditions, the turbulence generator 31 is stored in the bottom surface of the channel. When the gray-scale difference selection control module 2 controls the lifting of the turbulence generator 31, the cylinder is lifted. The fluid passes through the circumferential surface of the cylinder and forms a turbulent zone behind the cylinder, converting laminar flow into turbulent flow. The turbulent flow slows down the flow velocity and forms a mixed turbulent zone at the same time. The activated carbon adsorption dispenser 32 is turned on after the turbulence generator 31 is lifted, and the activated carbon is put into the turbulent zone to prevent the activated carbon adsorption dispenser 32 from accumulating at the bottom. The activated carbon is fixed in the form of a string, and three to four activated carbons are grouped together. Among a group of activated carbons, the activated carbon at the top has a floating block, and the activated carbon at the bottom has a weight block, so that each group of activated carbons put in can be perpendicular to the waste liquid distribution, enabling the upper, middle, and lower layers of the waste liquid to be affected by the adsorption of the activated carbon.

[0031] In this embodiment: The high-chromaticity color block is the conditioning reference module, and the waste liquid is located in the conditioning reference module. The parameters of the turbulence generator 31 and the activated carbon adsorption dispenser 32 are adjusted according to the color block area. The principle is that when the depth of the waste liquid increases and the length of the channel remains unchanged, increasing the number of the turbulence generators 31 can effectively reduce the liquid flow velocity. The activated carbon adsorption dispenser 32 puts the activated carbon into the turbulent zone to promote the contact and adsorption between the activated carbon and the waste liquid. The darker the chromaticity, the more turbulent points there are, and the slower the flow velocity decreases. At a fixed distance, the reaction time and reaction efficiency between the activated carbon and the waste liquid are increased to achieve dynamic adsorption adjustment within a limited channel, and this method is more in line with the application environment of the factory. After being conditioned by activated carbon adsorption, the chromaticity and some impurities are reduced, the toxicity of the waste liquid is reduced, and the chromaticity of the wastewater meets the treatment requirements of the decolorizer and also meets the subsequent biochemical wastewater feed water treatment standard.

[0032] In this embodiment: The industrial camera II 11 collects the chromaticity of the waste liquid after conditioning. The gray-scale difference selection control module 2 monitors whether the chromaticity of the waste liquid reaches the low-chromaticity color block group area. After the gray-scale difference selection control module 2 monitors that the chromaticity of the waste liquid does not meet the standard, it controls the waste liquid mixed with the activated carbon to flow back. The low-chromaticity waste liquid is mixed with the original chromaticity waste liquid to reduce the chromaticity. The industrial camera I 1 continues to detect, and the conditioning module 3 is controlled by the gray-scale difference selection control module 2 to treat the waste liquid.

[0033] In this embodiment: The waste liquid after decolorization passes through industrial camera II 11. Industrial camera II 11 cooperates with the gray-scale difference selection and control module 2 to detect the waste liquid in the same processing method as industrial camera I 1. If the waste liquid is still within the range of the high chroma color block area after being detected by the gray-scale difference selection and control module 2, the liquid mixed with activated carbon is controlled to flow back. The advantage of this process is that when the color of the waste liquid after treatment does not reach the expectation, it may be that the chroma is too deep or the activated carbon adsorption is incomplete. The waste liquid with reduced chroma flows back into the front flow channel in front of industrial camera I 1, reducing the chroma of the previous waste liquid by mixing the waste liquid with lower chroma with the previous waste liquid, and the activated carbon further flows to fully adsorb. After the chroma of the waste liquid with too high chroma is reduced, the chroma is continuously further reduced by the adsorption of activated carbon. After the waste water is refluxed and treated twice, the chroma reaches the low chroma color block area, and subsequent operations are carried out.

[0034] In this embodiment: An activated carbon supplementary feeder 4 is arranged between the activated carbon adsorption feeder 32 and industrial camera II 11. The activated carbon supplementary feeder 4 takes the increased flow value detected by the flow monitor 5 in the flow channel as a reference and controls the activated carbon supplementary feeder 4 to supplement and feed activated carbon. When the waste liquid image information collected by industrial camera II 11 reaches the low chroma color block group, the waste liquid flows into the subsequent flow channel.

[0035] In this embodiment: The flow monitor 5 is arranged in the flow channel. The monitoring principle of the flow monitor 5 is: in a flow channel with a constant cross-section, the product of the flow velocity and the fluid cross-section; when the cross-section of the flow channel is constant, the fluid cross-section area can be calculated from the liquid level height; the liquid level height can be obtained through a liquid level sensor, and the liquid level sensor is a prior art, and the flow velocity can be detected by a flow velocity meter or a flow velocity sensor. Under normal circumstances, the flow rate of the waste liquid in the flow channel is constant. If the amount of waste liquid generated in production is not fixed, the flow rate can be fixed by means of storage and regulated transportation; when the high chroma waste liquid flowing back enters the front flow channel of industrial camera I 1, the flow rate of the flow channel will inevitably increase; the flow monitor 5 detects the change in the flow rate, and in the subsequent treatment process, according to the increase in the flow rate, the activated carbon supplementary feeder 4 is controlled to supplement the waste liquid to meet the waste liquid treatment requirements.

[0036] In this embodiment: The activated carbon supplementary feeder 4 and the activated carbon adsorption feeder 32 have the same principle. The refluxed waste liquid and the original waste liquid are mixed, resulting in an increase in flow rate and a decrease in chroma. After industrial camera I 1 cooperates with the gray-scale difference selection and control module 2 to obtain the current chroma of the waste liquid, the gray-scale difference selection and control module 2 controls the feeding quantity of the activated carbon adsorption feeder 32.

[0037] Feeding method 1: Multiple activated carbon adsorption feeders 32 are provided, and the number of activated carbon supplementary feeders 4 is the same as that of the activated carbon adsorption feeders 32. The activated carbon supplementary feeder 4 is turned on when the flow rate sensor detects that the liquid level is higher than the set threshold, and the feeding speed of the activated carbon supplementary feeder 4 is the same as that of the activated carbon adsorption feeder 32. Know the ratio of the flow rate increment to the original flow rate, and obtain the number of activated carbon supplementary feeders 4 turned on according to the number of existing activated carbon adsorption feeders 32 * [the ratio of the flow rate increment to the original flow rate to obtain the number of activated carbon supplementary feeders 4 turned on].

[0038] Feeding method 2: A delivery water pump is added to the reflux channel, and the delivery water pump quantitatively controls the reflux flow rate of the reflux wastewater, and the delivery water pump controls the reflux flow rate to be the same as the original flow rate; when the actual flow rate changes to twice the original flow rate, the number of activated carbon supplementary feeders 4 and the activated carbon adsorption feeders 32 turned on and the feeding speed are the same.

[0039] In this embodiment: A liquid storage and impurity filtering tank 6 and a liquid conveyor 7 are sequentially arranged behind the industrial camera II 11. The wastewater reaching the low-chromaticity color block group enters the liquid storage and impurity filtering tank 6 to remove activated carbon. After the waste liquid accumulates, a liquid level height that satisfies the operation of the liquid conveyor 7 is generated. The liquid conveyor 7 selects the color block with the closest accurate gray value difference through the gray difference selection and control module 2 based on the image information collected by the industrial camera II 11. The liquid conveyor 7 controls the waste liquid in the liquid storage and impurity filtering tank 6 to enter the decolorization flow channels corresponding to the color blocks in multiple decolorization flow channels at a constant flow rate. The decolorizing agent dosing module 8 performs secondary decolorization on the low-chromaticity waste liquid, and the decolorized waste liquid enters the decolorized waste liquid homogenization tank 9 for homogenization, and the homogenized waste liquid meets the quality requirements of the biochemical treatment waste liquid.

[0040] In this embodiment: The waste liquid reaching the low-chromaticity color block area enters the interior of the liquid storage and impurity filtering tank 6. After the waste liquid is filtered in the liquid storage and impurity filtering tank 6, the activated carbon is recovered, analyzed and reused; the liquid level height generated in the liquid storage and impurity filtering tank 6 is higher than the minimum liquid level value for the operation of the liquid conveyor 7. According to the image information collected by the subsequent industrial camera I 1 and combined with the gray difference selection and control module 2, the corresponding low-chromaticity color block is obtained. According to the waste liquid chromaticity, the corresponding decolorization treatment flow channel is selected through the liquid conveyor 7 and processed through the decolorizing agent dosing module 8; the parameters of the decolorizing agent dosing modules 8 in multiple decolorization flow channels are fixed but different from each other. Through the liquid conveyor 7, the liquid is analyzed twice according to the image, and the decolorizing agent dosing module 8 corresponding to the corresponding chromaticity is selected for treatment. The decolorizing agent in the decolorizing agent dosing module 8 corresponds to the waste liquid chromaticity. During the control process of the liquid conveyor 7, when the gray value of the waste liquid is at the intermediate value of the gray values of two low-chromaticity color blocks, the high-gray-value color block is selected. If there is a problem of abnormal decolorization caused by an increase in the decolorizing agent dosage, complete decolorization can be achieved by increasing the number of low-chromaticity color blocks and reducing the increase in the decolorizing agent dosage.

[0041] In this embodiment: During the control of the liquid transporter 7, when the gray value of the waste liquid image collected by the second industrial camera 11 is at the median of the gray values of two low-chromaticity color patches, the low-gray-value color patch is selected. There is still a distance between the second industrial camera 11 and the liquid storage and impurity filtration tank 6. The activated carbon flows into the liquid storage and impurity filtration tank 6 along with the waste liquid. The chromaticity information processed by the gray difference selection and regulation module 2 for the image collected by the second industrial camera 11 still reacts with the activated carbon before reaching the liquid storage and impurity filtration tank 6. When the activated carbon is not saturated, the chromaticity inside the liquid storage and impurity filtration tank 6 will be lower than the detected chromaticity of the first industrial camera 1, and the final chromaticity is closer to the low-gray-value color patch.

[0042] In this embodiment: When the gray value of the waste liquid image collected by the first industrial camera 1 is at the median between the gray values of two color patches, the gray difference selection and regulation module 2 preferentially selects the high-chromaticity color patch. The activated carbon is used for pre-treatment of wastewater color adjustment, and the high-chromaticity color patch will further reduce the chromaticity. Secondary color selection will be performed later, and a high reduction in chromaticity will not affect the treatment of wastewater by the decolorizing agent.

[0043] In this embodiment: An industrial camera 12 is added to the liquid storage and impurity filtration tank 6 for image collection. The industrial camera 12 is equipped with a same-color gradient chromaticity multi-color patch auxiliary sheet. The gray difference selection and regulation module 2 combines the same-color gradient chromaticity multi-color patch auxiliary sheet to detect and obtain the low-chromaticity color patch closest to it, and the wastewater is discharged according to the decolorization flow channel corresponding to the low-chromaticity color patch.

[0044] In this embodiment: An industrial camera 12 is added to the liquid storage and impurity filtration tank 6 for detection to improve the accuracy of decolorization and flow diversion. The color patches of the decolorization reference module correspond to the decolorizing agent dosing module 8. The above describes the non-uniformity of the waste liquid chromaticity and the optimal treatment chromaticity range of the decolorizing agent. The industrial camera 12 compares the chromaticity again, and the wastewater selects the flow channel according to the chromaticity. The chromaticity of the wastewater treated by the decolorizing agent dosing module 8 matches its own optimal treatment chromaticity.

[0045] In this embodiment: Large-particle activated carbon or molded activated carbon is connected in series in the form of a rope. The top activated carbon is fixed to the floating block by a rope, and the bottom activated carbon is fixed to the weight block by a rope. The linear activated carbon can achieve multi-water layer distribution in the water flow.

[0046] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A printing and dyeing wastewater treatment system, comprising an industrial camera 1 (1) and an industrial camera 2 (11) arranged in a printing and dyeing wastewater flow channel, characterized in that: The collection lens ends of the industrial camera 1 (1) and the industrial camera 2 (11) are both provided with a same-color gradient chromaticity multi-color block auxiliary sheet, each color block has a groove in the middle, wherein a plurality of color blocks are divided into two groups, the low-chromaticity color block group is a bleaching reference module, and the high-chromaticity color block group is a tempering reference module; The grayscale difference selection and control module (2) converts the image into a grayscale image based on the image information collected by the industrial camera 1 (1) and the industrial camera 2 (11). The grayscale difference selection and control module (2) determines the corresponding color block according to the minimum difference between the grayscale value of the waste liquid color area and the grayscale value of the multiple color blocks. Each color block corresponds to the tempering intensity or wastewater flow direction of the tempering module (3). The conditioning module (3) comprises a turbulence generator (31) and an activated carbon adsorption dispenser (32), wherein the turbulence generator (31) forms an obstacle block in the flow channel and forms turbulence behind the obstacle block, and the activated carbon adsorption dispenser (32) dispenses activated carbon into the turbulence zone formed by the turbulence generator (31). The conditioning intensity parameter corresponding to each high-chroma color block includes the number of obstacles of the turbulence generator (31) and the number of dispensed activated carbon by the activated carbon adsorption dispenser (32), and the number of obstacles and the number of dispensed activated carbon increase synchronously with the increase of chroma.

2. A printing and dyeing wastewater treatment system according to claim 1, characterized in that: The industrial camera 2 (11) collects the chromaticity of the waste liquid after conditioning, and the grayscale difference selection and control module (2) monitors whether the chromaticity of the waste liquid reaches the low-chromaticity color block group area. The grayscale difference selection and control module (2) controls the waste liquid to be mixed with activated carbon and reflux after the chromaticity of the waste liquid does not meet the standard, and the low-chromaticity waste liquid is mixed with the original chromaticity waste liquid to reduce the chromaticity. The industrial camera 1 (1) continues to detect and controls the conditioning module (3) to process the waste liquid through the grayscale difference selection and control module (2).

3. A printing and dyeing wastewater treatment system according to claim 2, characterized in that: An activated carbon replenishing dispenser (4) is provided between the activated carbon adsorption dispenser (32) and the second industrial camera (11). The activated carbon replenishing dispenser (4) uses the flow rate increase value detected by the flow monitor (5) as a reference, and controls the activated carbon replenishing dispenser (4) to replenish the activated carbon. The waste liquid image information collected by the second industrial camera (11) reaches the low-chroma color block group, and the waste liquid flows into the subsequent flow channel.

4. A printing and dyeing wastewater treatment system according to claim 1, characterized in that: A liquid storage filter tank (6) and a liquid conveyor (7) are sequentially arranged behind the second industrial camera (11), so that wastewater meeting the requirements of the low-chroma color block group enters the liquid storage filter tank (6) to remove the activated carbon, and waste liquid accumulates to generate a liquid level height that meets the requirements of the operation of the liquid conveyor (7).

5. A printing and dyeing wastewater treatment system according to claim 4, characterized in that: The liquid conveyor (7) is based on the image information collected by the second industrial camera (11) and obtains the color block with the closest gray value difference through the gray value difference selection control module (2). The liquid conveyor (7) controls the waste liquid in the liquid storage and filtration tank (6) to enter the decolorization flow channel of the corresponding color block in the multiple decolorization flow channels at a constant flow rate. The decolorizing agent delivery module (8) performs secondary decolorization on the low-color waste liquid. The decolorized waste liquid enters the decolorization waste liquid homogenization tank (9) for homogenization. The homogenized waste liquid meets the quality requirements of the biochemical treatment waste liquid.

6. A printing and dyeing wastewater treatment system according to claim 1, characterized in that: The grayscale value of the waste liquid image is located at an intermediate value between the grayscale values ​​of the two color blocks, and the grayscale difference selection and control module (2) preferentially selects the high chromaticity color block.

7. A printing and dyeing wastewater treatment system according to claim 5, characterized in that: An industrial camera 3 (12) is added to the liquid storage and filtration tank (6) for image acquisition. The industrial camera 3 (12) is equipped with a multi-color block auxiliary film with the same color gradient chromaticity. The grayscale difference selection and control module (2) combines the multi-color block auxiliary film with the same color gradient chromaticity to obtain the closest low-chromaticity block, and the wastewater is discharged according to the decolorization flow channel corresponding to the low-chromaticity block.

8. A printing and dyeing wastewater treatment system according to claim 1, characterized in that: The obstacle shape of the turbulence generator (31) is a cylinder, and the water flow contacts the circumferential surface of the cylinder.

9. A printing and dyeing wastewater treatment system according to claim 1, characterized in that: The activated carbon dispensed by the activated carbon adsorption dispenser (32) is fixed by threading a rope, wherein at least three activated carbons form a group.

10. A printing and dyeing wastewater treatment system according to claim 9, characterized in that: In a group of activated carbon, a floating block is fixed above the top activated carbon by a rope, and a weighted block is fixed below the bottom activated carbon by a rope.

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