Activated carbon cleaning water recycling system

Abstract

The utility model belongs to the technical field of adipic acid production equipment, and particularly relates to an activated carbon cleaning water recycling system which comprises a first activated carbon filter, a wastewater buffer tank, a second activated carbon filter, a plate and frame filter press, a wastewater heating tank, an adipic acid dissolving and decolorizing tank, a circulating dissolving pump, an adipic acid solution storage tank and a condensate water recycling tank, external high-heat pure water is communicated with an input end at the bottom of the first activated carbon filter through a high-heat pure water input pipe; a first output end is arranged at the bottom of the first activated carbon filter and is communicated with an input end at the top of the wastewater buffer tank through a first output pipe; the upper part of the first activated carbon filter is connected with a light material discharge pipe; the output end of the light material discharge pipe is communicated with the inlet end at the bottom of the second activated carbon filter. The system disclosed by the utility model is high in stability and excellent in performance, and solves the problems of high consumption of high-purity water and overlarge wastewater discharge in an adipic acid purification section in a manner of solid-liquid separation and cyclic utilization of wastewater.

Description

Technical Field

[0001] This utility model belongs to the technical field of adipic acid production equipment, specifically relating to an activated carbon cleaning water recycling system. Background Technology

[0002] The process for producing adipic acid involves using copper and vanadium as catalysts to oxidize cyclohexanol with nitric acid. The resulting product is then crystallized, concentrated, and centrifuged to obtain crude adipic acid. Because the crude adipic acid solution contains numerous colored impurities, activated carbon is often added during the purification process to remove them.

[0003] However, as spent activated carbon accumulates in the filter, it needs to be cleaned regularly. In previous adipic acid production systems, after the spent activated carbon solution settled and separated, large amounts of wastewater were often directly discharged into ditches, which not only wasted water resources but also increased the wastewater treatment load.

[0004] Based on this, this utility model designs an activated carbon cleaning water recycling system that can fully separate waste activated carbon solution and then heat and recycle the filtrate into the system to replace high-temperature pure water as dilution water. This solves the problem of difficult recycling of wastewater discharged from activated carbon filters in adipic acid production, reduces production costs, and improves production efficiency. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides an activated carbon cleaning water recycling system. This system is highly stable and has excellent performance. By recycling wastewater through solid-liquid separation, it solves the problems of high high-purity water consumption and excessive wastewater discharge in the adipic acid purification process.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] An activated carbon cleaning water recycling system includes a first activated carbon filter, a wastewater buffer tank, a second activated carbon filter, a plate and frame filter press, a wastewater heating tank, an adipic acid dissolving and decolorizing tank, a circulating dissolving pump, an adipic acid solution storage tank, and a condensate recovery tank.

[0008] The external high-temperature pure water is connected to the input end at the bottom of the first activated carbon filter through the high-temperature pure water input pipe;

[0009] The first activated carbon filter has a first output end at the bottom, and is connected to the input end at the top of the wastewater buffer tank through the first output pipe;

[0010] The upper part of the first activated carbon filter is connected to a light material discharge pipe, and the output end of the light material discharge pipe is connected to the inlet end of the bottom of the second activated carbon filter; the output end of the upper part of the second activated carbon filter is connected to an external adipic acid solution storage tank through an adipic acid solution collection pipe.

[0011] The bottom of the wastewater buffer tank is equipped with a second output end, which is connected to the input end at the top of the plate and frame filter press through the second output pipe;

[0012] The plate and frame filter press has two output ends at the bottom, namely the third output end and the fourth output end. The third output end is connected to the input end at the top of the wastewater heating tank through the third output pipe; the fourth output end is the waste carbon discharge end.

[0013] The bottom of the wastewater heating tank is equipped with a fifth output end, which is connected to the input end at the top of the adipic acid dissolving and decolorizing tank through a dilution water inlet pipe;

[0014] The bottom of the adipic acid dissolving and decolorizing tank is provided with two output ends, namely the sixth output end and the seventh output end. The sixth output end is connected to the high-temperature pure water input pipe through the sixth output pipe.

[0015] The seventh output end of the adipic acid dissolving and decolorizing tank is connected to the inlet end of the circulating dissolving pump through the seventh output pipe, and the outlet end of the circulating dissolving pump is connected to the top of the adipic acid dissolving and decolorizing tank through the eighth output pipe.

[0016] The eighth output pipe is equipped with a concentration meter; the dilution water inlet pipe is also equipped with a flow regulating valve, and the concentration meter and the flow regulating valve are interlocked.

[0017] Furthermore, the high-temperature pure water inlet pipe is equipped with a high-temperature pure water control valve and a first activated carbon filter feed pump.

[0018] Furthermore, a material outlet control valve is installed on the first output pipe.

[0019] Furthermore, a light material control valve is installed on the light material discharge pipe.

[0020] Furthermore, an adipic acid solution collection valve is provided on the adipic acid solution collection tube.

[0021] Furthermore, a wastewater control valve is installed on the second output pipe.

[0022] Furthermore, a wastewater transfer pump is installed on the dilution water inlet pipe.

[0023] Furthermore, the top of the wastewater buffer tank is also equipped with a DN300 exhaust pipe, which is connected to the atmosphere.

[0024] Furthermore, an activated carbon filter cleaning control valve is installed on the sixth output pipe.

[0025] Specifically, the concentration meter has a signal transmitting end, and the flow regulating valve has a signal receiving end. The concentration meter can send an open or close signal to the flow regulating valve to control the opening or closing of the flow regulating valve.

[0026] In this utility model, the flow regulating valve and the concentration meter adopt conventional models from existing equipment. The structure of the concentration meter and the interlocking control method between the concentration meter and the flow regulating valve can be set conventionally in the existing technology, and are not the inventive point of this utility model, so they will not be described in detail.

[0027] Furthermore, the wastewater heating tank is also equipped with a heating coil. The inlet end of the heating coil extends out of the wastewater heating tank and is connected to an external low-pressure steam source through a low-pressure steam pipe. The outlet end of the heating coil extends out of the wastewater heating tank and is connected to an external condensate recovery tank through a condensate recovery pipe.

[0028] Furthermore, a low-pressure steam control valve is installed on the low-pressure steam pipe, and a wastewater heating tank thermometer is installed outside the wastewater heating tank, with the sensing end of the wastewater heating tank thermometer extending into the wastewater heating tank; the wastewater heating tank thermometer is interlocked with the low-pressure steam control valve.

[0029] Specifically, the wastewater heating tank thermometer has a signal transmitting end, and the low-pressure steam control valve has a signal receiving end. The wastewater heating tank thermometer can send an open or close signal to the low-pressure steam control valve to control the opening or closing of the low-pressure steam control valve.

[0030] The low-pressure steam control valve and wastewater heating tank thermometer of this utility model adopt conventional models in existing equipment. The structure of the wastewater heating tank thermometer and the interlocking control method between the wastewater heating tank thermometer and the low-pressure steam control valve can be set by conventional settings in existing technology, and are not the inventive point of this utility model, so they will not be described in detail.

[0031] Furthermore, the top of the wastewater heating tank is equipped with a ninth output end, which is connected to the dilution water inlet pipe through an overflow pipe. An overflow valve is installed on the overflow pipe. When the level of the filtered liquid entering the wastewater heating tank is too high, the overflow valve can be opened to allow the filtered liquid in the wastewater heating tank to flow into the dilution water inlet pipe.

[0032] Furthermore, the adipic acid dissolving and decolorizing tank is also equipped with an overflow weir, which divides the internal cavity of the adipic acid dissolving and decolorizing tank into a dissolving functional zone and a decolorizing functional zone. The connection between the dilution water inlet pipe and the adipic acid dissolving and decolorizing tank is located at the top of the dissolving functional zone of the adipic acid dissolving and decolorizing tank. The concentration of the material in the adipic acid dissolving and decolorizing tank is detected by a concentration meter, and an open or closed signal is sent to the flow regulating valve, thereby controlling the flow regulating valve to adjust the amount of hot water added into the dissolving functional zone of the adipic acid dissolving and decolorizing tank.

[0033] Compared with the prior art, the beneficial effects of this utility model are:

[0034] 1. The main purpose of this utility model is to separate the waste activated carbon aqueous solution generated during the production of adipic acid using a plate and frame filter press, collect and treat the solid waste activated carbon, and then put the recovered filtered water into a wastewater heating tank for reuse.

[0035] 2. This utility model, by incorporating a plate and frame filter press, and interlocking control of a concentration meter and flow regulating valve, as well as interlocking control of a wastewater heating tank thermometer and low-pressure steam control valve, achieves the recovery and recycling of solid waste cleaning liquid. This reduces water consumption and wastewater treatment volume during adipic acid production, and thus possesses certain industrial application value.

[0036] 3. The system described in this utility model has reliable performance and can solve the technical problem of wastewater recycling in the activated carbon cleaning process. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the activated carbon cleaning water recycling system described in Example 1;

[0038] In the diagram: 1. Adipic acid dissolving and decolorizing tank; 2. First activated carbon filter feed pump; 3. First activated carbon filter; 4. Light material control valve; 5. Second activated carbon filter; 6. Material outlet control valve; 7. High-temperature pure water control valve; 8. Plate and frame filter press; 9. Wastewater heating tank; 10. Wastewater heating tank thermometer; 11. Wastewater transfer pump; 12. Concentration meter; 13. Flow regulating valve; 14. Circulating dissolving pump; 15. Activated carbon filter cleaning control valve; 16. Wastewater buffer tank; 17. Wastewater control valve; 31. High-temperature pure water inlet pipe; 32. Light material outlet pipe; 51. Adipic acid solution collection pipe; 52. Adipic acid solution collection valve; 91. Dilution water inlet pipe; 92. Low-pressure steam pipe; 93. Condensate recovery pipe; 94. Overflow pipe; 95. Low-pressure steam control valve; 96. Overflow valve. Detailed Implementation

[0039] The present invention will be further described below with reference to the embodiments and accompanying drawings, but this is not intended to limit the present invention.

[0040] In the description of this utility model, it should be noted that the directional terms such as "upper", "lower", "top", "bottom", "inner", and "outer" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of the present invention.

[0041] It should be noted that the terms "first," "second," "third," "1#," "2#," etc., used in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein.

[0042] Example 1

[0043] like Figure 1 As shown, an activated carbon cleaning water recycling system includes a first activated carbon filter 3, a wastewater buffer tank 16, a second activated carbon filter 5, a plate and frame filter press 8, a wastewater heating tank 9, an adipic acid dissolving and decolorizing tank 1, a circulating dissolving pump 14, an adipic acid solution storage tank, and a condensate recovery tank.

[0044] The external high-temperature pure water is connected to the input end at the bottom of the first activated carbon filter 3 through the high-temperature pure water input pipe 31. The high-temperature pure water input pipe 31 is equipped with a high-temperature pure water control valve 7 and a first activated carbon filter feed pump 2.

[0045] The first activated carbon filter 3 has a first output end at the bottom, and is connected to the input end at the top of the wastewater buffer tank 16 through the first output pipe; the first output pipe is equipped with a material outlet control valve 6.

[0046] The upper part of the first activated carbon filter 3 is connected to a light material discharge pipe 32, the output end of which is connected to the inlet end of the bottom of the second activated carbon filter 5. A light material control valve 4 is provided on the light material discharge pipe 32. The upper output end of the second activated carbon filter 5 is connected to an external adipic acid solution storage tank through an adipic acid solution collection pipe 51. An adipic acid solution collection valve 52 is provided on the adipic acid solution collection pipe 51.

[0047] The first activated carbon filter 3 is used to filter the activated carbon after adsorbing colored impurities, and the second activated carbon filter 5 is used to filter the activated carbon that has leaked abnormally before entering the second activated carbon filter 5.

[0048] The bottom of the wastewater buffer tank 16 is provided with a second output end, which is connected to the input end of the plate and frame filter press 8 through the second output pipe; a wastewater control valve 17 is provided on the second output pipe;

[0049] The plate and frame filter press 8 has two output ends at the bottom, namely the third output end and the fourth output end. The third output end is connected to the input end at the top of the wastewater heating tank 9 through the third output pipe; the fourth output end is the waste carbon discharge end.

[0050] The bottom of the wastewater heating tank 9 is provided with a fifth output end, which is connected to the input end at the top of the adipic acid dissolving and decolorizing tank 1 through the dilution water inlet pipe 91; a wastewater transfer pump 11 is provided on the dilution water inlet pipe 91.

[0051] The top of the wastewater buffer tank 16 is also equipped with a DN300 exhaust pipe, which is connected to the atmosphere.

[0052] The bottom of the adipic acid dissolving and decolorizing tank 1 is provided with two output ends, namely the sixth output end and the seventh output end. The sixth output end is connected to the high-temperature pure water input pipe 31 through the sixth output pipe. The sixth output pipe is provided with an activated carbon filter cleaning control valve 15.

[0053] The seventh output end of the adipic acid dissolving and decolorizing tank 1 is connected to the inlet end of the circulating dissolving pump 14 through the seventh output pipe, and the outlet end of the circulating dissolving pump 14 is connected to the top of the adipic acid dissolving and decolorizing tank 1 through the eighth output pipe.

[0054] The eighth output pipe is equipped with a concentration meter 12; the dilution water inlet pipe 91 is also equipped with a flow regulating valve 13, and the concentration meter 12 and the flow regulating valve 13 are interlocked.

[0055] Specifically, the concentration meter 12 has a signal transmitting end, and the flow regulating valve 13 has a signal receiving end. The concentration meter 12 can send an open or close signal to the flow regulating valve 13 to control the opening or closing of the flow regulating valve 13.

[0056] In this utility model, the flow regulating valve 13 and the concentration meter 12 adopt conventional models in existing equipment. The structure of the concentration meter 12 and the interlocking control method between the concentration meter 12 and the flow regulating valve 13 can be set by conventional settings in the existing technology, and are not the inventive point of this utility model, so they will not be described in detail.

[0057] The wastewater heating tank 9 is also equipped with a heating coil (not shown in the figure). The inlet end of the heating coil extends out of the wastewater heating tank 9 and is connected to the external low-pressure steam through the low-pressure steam pipe 92. The outlet end of the heating coil extends out of the wastewater heating tank 9 and is connected to the external condensate recovery tank through the condensate recovery pipe 93.

[0058] The low-pressure steam pipe 92 is also equipped with a low-pressure steam control valve 95, and the wastewater heating tank 9 is also equipped with a wastewater heating tank thermometer 10. The temperature sensing end of the wastewater heating tank thermometer 10 extends into the wastewater heating tank 9; the wastewater heating tank thermometer 10 is interlocked with the low-pressure steam control valve 95.

[0059] Specifically, the wastewater heating tank thermometer 10 has a signal transmitting end, and the low-pressure steam control valve 95 has a signal receiving end. The wastewater heating tank thermometer 10 can send an opening or closing signal to the low-pressure steam control valve 95 to control the opening or closing of the low-pressure steam control valve 95.

[0060] In this utility model, the low-pressure steam control valve 95 and the wastewater heating tank thermometer 10 adopt conventional models in existing equipment. The structure of the wastewater heating tank thermometer 10 and the interlocking control method between the wastewater heating tank thermometer 10 and the low-pressure steam control valve 95 can be set in conventional settings in existing technology, and are not the inventive point of this utility model, so they will not be described in detail.

[0061] The top of the wastewater heating tank 9 is also provided with a ninth output end, which is connected to the dilution water inlet pipe 91 through the overflow pipe 94. The overflow pipe 94 is provided with an overflow valve 96. When the level of the filtered liquid entering the wastewater heating tank 9 is too high, the overflow valve 96 can be opened to allow the filtered liquid in the wastewater heating tank 9 to flow into the dilution water inlet pipe 91.

[0062] Low-pressure steam can be used to heat the material in the wastewater heating tank 9. The temperature of the material in the wastewater heating tank 9 is measured by the wastewater heating tank thermometer 10, and the amount of low-pressure steam entering is controlled by sending an open or close signal to the low-pressure steam control valve 95, thereby controlling the heating temperature in the wastewater heating tank 9 to 85°C.

[0063] The adipic acid dissolving and decolorizing tank 1 is also equipped with an overflow weir (the overflow weir can be a conventional setting in the prior art, and is not the point of invention of this utility model, so it will not be described in detail), which divides the internal cavity of the adipic acid dissolving and decolorizing tank 1 into a dissolving functional area and a decolorizing functional area; the connection between the dilution water inlet pipe 91 and the adipic acid dissolving and decolorizing tank 1 is located at the top of the dissolving functional area of ​​the adipic acid dissolving and decolorizing tank 1. The concentration of the material in the adipic acid dissolving and decolorizing tank 1 is detected by the concentration meter 12, and an open or close signal is sent to the flow regulating valve 13, thereby controlling the flow regulating valve 13 to regulate the amount of hot water added into the dissolving functional area of ​​the adipic acid dissolving and decolorizing tank 1.

[0064] The clarified liquid after filtration by plate and frame filter press 8 is discharged into wastewater heating tank 9 for heating. After being heated by wastewater heating tank 9, the clarified liquid is transported to adipic acid dissolving and decolorizing tank 1 by wastewater transfer pump 11. The solubility is improved in the dissolving functional area of ​​adipic acid dissolving and decolorizing tank 1. The clarified liquid after dissolution overflows into the decolorizing functional area. Then, 5wt% activated carbon solution is added to the decolorizing functional area to adsorb colored impurities in the clarified liquid.

[0065] The main purpose of this invention is to separate the waste activated carbon aqueous solution generated during the production of adipic acid using a plate and frame filter press 8, collect and process the solid waste activated carbon, and then put the recovered filtered water into a wastewater heating tank 9 for reuse.

[0066] This invention achieves the recovery and recycling of solid waste cleaning liquid by setting up a plate and frame filter press 8, and interlocking control of concentration meter 12 and flow regulating valve 13, and interlocking control of wastewater heating tank thermometer 10 and low-pressure steam control valve 95. It reduces the consumption of water resources and the amount of wastewater to be treated in the production of adipic acid, and has certain industrial application value.

[0067] The operation process of this utility model:

[0068] 1. When the first activated carbon filter 3 reaches the operating cycle, close the activated carbon filter cleaning control valve 15 and the first activated carbon filter feed pump 2 to start cleaning the first activated carbon filter 3.

[0069] 2. During cleaning, first open the high-temperature pure water control valve 7, close the light material control valve 4 and the material outlet control valve 6, and then turn on the first activated carbon filter feed pump 2. After the first activated carbon filter feed pump 2 has been running for 14 seconds, open the light material control valve 4 and flush hot water into the first activated carbon filter 3 through the high-temperature pure water inlet pipe 31 until the first activated carbon filter 3 is thoroughly rinsed. The preferred cleaning time is 18 minutes.

[0070] After cleaning is completed, open the material outlet control valve 6 to discharge the cleaning wastewater into the wastewater buffer tank 16. The discharge process lasts for 2 minutes. Then close the material outlet control valve 6 to finish cleaning and resume operation.

[0071] 3. When it is necessary to filter the fluid material entering the wastewater buffer tank 16, the fluid material discharged from the wastewater buffer tank 16 enters the plate and frame filter press 8 in batches under the control of the wastewater control valve 17, preferably with a flow rate of 0.85 m³ / h. 3 / Second-rate;

[0072] The clarified liquid after filtration by the plate and frame filter press 8 is discharged into the wastewater heating tank 9 for heating. At the same time, the temperature of the material in the wastewater heating tank 9 is measured by the wastewater heating tank thermometer 10, and the amount of low-pressure steam entering is controlled by sending an open or close signal to the low-pressure steam control valve 95, and the heating temperature in the wastewater heating tank 9 is controlled to be 85℃.

[0073] 4. After being heated by the wastewater heating tank 9, the clear liquid is delivered to the adipic acid dissolving and decolorizing tank 1 by the wastewater transfer pump 11. At the same time, the concentration of the material in the adipic acid dissolving and decolorizing tank 1 is detected by the concentration meter 12, and an open or close signal is sent to the flow regulating valve 13, thereby controlling the flow regulating valve 13 to adjust the amount of hot water added to the dissolving functional area of ​​the adipic acid dissolving and decolorizing tank 1.

[0074] Finally, the clear liquid discharged from the adipic acid dissolving and decolorizing tank 1 can be used to dilute and dissolve adipic acid crystals. At this time, the activated carbon filter cleaning control valve 15 is opened, the high-temperature pure water control valve 7 and the material outlet control valve 6 are closed, and the clear liquid discharged from the adipic acid dissolving and decolorizing tank 1 enters the first activated carbon filter 3. Then, the light material control valve 4 is opened, and the clear liquid enters the second activated carbon filter 5. Finally, it enters the adipic acid solution storage tank through the adipic acid solution collection pipe 51.

[0075] 5. During the heat exchange process of the wastewater heating tank 9, the external low-pressure steam enters the heating coil of the wastewater heating tank 9 from the low-pressure steam pipe 92. After exchanging heat with the material in the wastewater heating tank 9, it is discharged into the condensate recovery tank through the condensate recovery pipe 93.

[0076] 6. When the level of the filtered liquid entering the wastewater heating tank 9 is too high, the overflow valve 96 can be opened to allow the filtered liquid in the wastewater heating tank 9 to flow into the dilution water inlet pipe 91.

[0077] The main purpose of this invention is to separate the waste activated carbon aqueous solution generated during the production of adipic acid using a plate and frame filter press 8, and then discharge the solid waste activated carbon from the fourth output end (waste carbon discharge end) of the plate and frame filter press 8 for collection.

[0078] The filtered water is recovered through the third output end of the plate and frame filter press 8 and enters the wastewater heating tank 9 to heat the filtered water and control the temperature to 85°C. Then, it is sent by the wastewater transfer pump 11 into the adipic acid dissolving and decolorizing tank 1 as dilution water for adipic acid crystallization.

[0079] This utility model, by setting up a plate and frame filter press 8, a wastewater heating tank thermometer 10, a concentration meter 12, a flow regulating valve 13, and other equipment, can realize the heating and concentration regulation of the clear liquid discharged from the plate and frame filter press 8, and recover and recycle the clear liquid, thereby reducing the consumption of water resources and the amount of wastewater to be treated in the production of adipic acid, and has certain industrial application value.

[0080] The above embodiments are illustrative examples of the implementation of this utility model. The implementation of this utility model is not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of this utility model shall be considered equivalent substitutions and shall be included within the protection scope of this utility model.

Claims

1. A system for recycling activated carbon cleaning water, characterized in that, It includes a first activated carbon filter, a wastewater buffer tank, a second activated carbon filter, a plate and frame filter press, a wastewater heating tank, an adipic acid dissolving and decolorizing tank, a circulating dissolving pump, an adipic acid solution storage tank, and a condensate recovery tank; The external high-temperature pure water is connected to the input end at the bottom of the first activated carbon filter through the high-temperature pure water input pipe; The first activated carbon filter has a first output end at the bottom, and is connected to the input end at the top of the wastewater buffer tank through the first output pipe; The upper part of the first activated carbon filter is connected to a light material discharge pipe, and the output end of the light material discharge pipe is connected to the inlet end of the bottom of the second activated carbon filter; the output end of the upper part of the second activated carbon filter is connected to an external adipic acid solution storage tank through an adipic acid solution collection pipe. The bottom of the wastewater buffer tank is equipped with a second output end, which is connected to the input end at the top of the plate and frame filter press through the second output pipe; The plate and frame filter press has two output ends at the bottom, namely the third output end and the fourth output end. The third output end is connected to the input end at the top of the wastewater heating tank through the third output pipe; the fourth output end is the waste carbon discharge end. The bottom of the wastewater heating tank is equipped with a fifth output end, which is connected to the input end at the top of the adipic acid dissolving and decolorizing tank through a dilution water inlet pipe; The bottom of the adipic acid dissolving and decolorizing tank is provided with two output ends, namely the sixth output end and the seventh output end. The sixth output end is connected to the high-temperature pure water input pipe through the sixth output pipe. The seventh output end of the adipic acid dissolving and decolorizing tank is connected to the inlet end of the circulating dissolving pump through the seventh output pipe, and the outlet end of the circulating dissolving pump is connected to the top of the adipic acid dissolving and decolorizing tank through the eighth output pipe. The eighth output pipe is equipped with a concentration meter; the dilution water inlet pipe is also equipped with a flow regulating valve, and the concentration meter and the flow regulating valve are interlocked.

2. The activated carbon cleaning water recycling system as described in claim 1, characterized in that, The high-temperature pure water inlet pipe is equipped with a high-temperature pure water control valve and a first activated carbon filter feed pump.

3. The activated carbon cleaning water recycling system as described in claim 1, characterized in that, The first output pipe is equipped with a material outlet control valve; the light material discharge pipe is equipped with a light material control valve.

4. The activated carbon cleaning water recycling system as described in claim 1, characterized in that, The adipic acid solution collection pipe is equipped with an adipic acid solution collection valve; the second output pipe is equipped with a wastewater control valve.

5. The activated carbon cleaning water recycling system as described in claim 1, characterized in that, A wastewater transfer pump is installed on the dilution water inlet pipe.

6. The activated carbon cleaning water recycling system as described in claim 1, characterized in that, The sixth output pipe is equipped with an activated carbon filter cleaning control valve.

7. The activated carbon cleaning water recycling system as described in claim 1, characterized in that, The wastewater heating tank is also equipped with a heating coil. The inlet end of the heating coil extends out of the wastewater heating tank and is connected to an external low-pressure steam source through a low-pressure steam pipe. The outlet end of the heating coil extends out of the wastewater heating tank and is connected to an external condensate recovery tank through a condensate recovery pipe.

8. The activated carbon cleaning water recovery and recycling system as described in claim 7, characterized in that, The low-pressure steam pipe is also equipped with a low-pressure steam control valve, and a wastewater heating tank thermometer is also installed outside the wastewater heating tank. The temperature sensing end of the wastewater heating tank thermometer extends into the wastewater heating tank; the wastewater heating tank thermometer is interlocked with the low-pressure steam control valve.

9. The activated carbon cleaning water recycling system as described in claim 1, characterized in that, The top of the wastewater heating tank is also equipped with a ninth output end, which is connected to the dilution water inlet pipe through an overflow pipe, and an overflow valve is installed on the overflow pipe.

10. The activated carbon cleaning water recovery and recycling system as described in claim 1, characterized in that, The adipic acid dissolving and decolorizing tank is also equipped with an overflow weir, which divides the internal cavity of the adipic acid dissolving and decolorizing tank into a dissolving functional area and a decolorizing functional area; the connection between the dilution water inlet pipe and the adipic acid dissolving and decolorizing tank is located at the top of the dissolving functional area of ​​the adipic acid dissolving and decolorizing tank.

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