Copper sulfate wastewater treatment system

Abstract

The utility model relates to a copper sulfate wastewater treatment system, which comprises three stages of reaction kettles, the three stages of reaction kettles comprise at least three stages of gradient reaction kettles, the first gradient reaction kettle is a spiral guide plate, the second gradient reaction kettle is provided with a PH value detection module, and the PH value detection module is used for adjusting the injection rate of a catalyst according to the real-time PH value; the third gradient reaction kettle is provided with a PTFE (Polytetrafluoroethylene) composite membrane with gradient change aperture, and the first gradient reaction kettle, the second gradient reaction kettle and the third gradient reaction kettle are sequentially arranged from top to bottom along the reaction kettle; the double-pressure distillation tower is connected with the third-stage reaction kettle, the double-pressure distillation tower comprises a first pressure area and a second pressure area which are communicated with each other, and the pressure of the first pressure area is greater than that of the second pressure area; the centrifugal unit is connected with the double-pressure distillation tower, a diversion trench is arranged at an outlet of the centrifugal unit, and an electro-adsorption module is arranged in the diversion trench and used for adsorbing residual cationic polyacrylamide.

Description

Technical Field

[0001] This invention relates to the field of copper sulfate wastewater treatment technology, and in particular to a copper sulfate wastewater treatment system. Background Technology

[0002] The production of sodium saccharin generates wastewater containing copper sulfate and organic matter (such as toluene derivatives), which requires careful treatment. In the high-purity copper industry, wastewater containing copper nitrate and copper sulfate is a common pollutant. Direct discharge of this wastewater without treatment will severely pollute water bodies, impacting the ecological environment and human health. Therefore, developing effective treatment methods is of paramount importance.

[0003] The patent with publication number CN203999198U provides a copper sulfate wastewater treatment system, which includes a copper sulfate wastewater container, a reaction tank and a filter device connected in sequence, and a pressure pump is installed on the pipeline between the reaction tank and the filter device.

[0004] The copper sulfate wastewater treatment system provided by the related technologies has a simple structure, low resource recovery rate for copper sulfate, high impurity and low purity in hydrochloric acid recovery, complex process flow, is environmentally unfriendly and has high technical costs.

[0005] In view of the shortcomings of existing copper sulfate wastewater treatment systems, the inventor, based on years of practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with theoretical application, actively researched and innovated to create a new copper sulfate wastewater treatment system that could improve upon existing systems and make them more practical. Through continuous research, design, and repeated trials and improvements, this invention, possessing genuine practical value, was finally created. Summary of the Invention

[0006] The main objective of this invention is to overcome the shortcomings of existing copper sulfate wastewater treatment systems and provide a new copper sulfate wastewater treatment system. The technical problem to be solved is that it can address the issues of low resource recovery rate, high impurities in hydrochloric acid recovery rate, low purity, complex process flow, environmental unfriendliness, and high technical cost, thus making it more practical and industrially valuable.

[0007] On the one hand, a copper sulfate wastewater treatment system is provided, the system comprising:

[0008] The three-stage reactor comprises at least three gradient reactors. The first gradient reactor is a spiral guide plate, which enables the copper sulfate wastewater and catalyst to form a turbulent flow region with a swirling field strength ≥5m / s. The second gradient reactor is equipped with a pH detection module, which is used to adjust the injection rate of the N,N-dimethylformamide catalyst based on the real-time pH value. The third gradient reactor is equipped with a PTFE composite membrane with varying pore size for the retention and reuse of unreacted catalyst. The first, second, and third gradient reactors are arranged sequentially from top to bottom along the reactor.

[0009] A dual-pressure distillation column is connected to the three-stage reactor. The dual-pressure distillation column includes a first pressure zone and a second pressure zone that are interconnected, wherein the pressure in the first pressure zone is greater than the pressure in the second pressure zone.

[0010] A centrifuge unit is connected to the dual-pressure distillation column. The outlet of the centrifuge unit is provided with a guide channel, and an electro-adsorption module is provided in the guide channel for adsorbing residual cationic polyacrylamide.

[0011] In one optional embodiment, the first pressure zone is provided with a steam jet pump, the nozzle angle of which is 55° to 57°.

[0012] In an optional embodiment, a preheater and a suspension separator are also included;

[0013] The preheater is connected to the three-stage reactor and is used to preheat the copper sulfate wastewater and the catalyst.

[0014] The suspension separator is connected to the three-stage reactor and is used to separate the liquid and gas in the three-stage reactor.

[0015] In an optional embodiment, a hydrochloric acid absorption tower is further included, which is connected to the dual-pressure distillation tower for absorbing evaporated hydrochloric acid gas.

[0016] In an optional embodiment, the system further includes an acid storage tank connected to the hydrochloric acid absorption tower for storing the desorbed hydrochloric acid.

[0017] In an optional embodiment, a copper sulfate storage tank is also included for storing processed copper sulfate crystals.

[0018] In one alternative embodiment, the first gradient reactor, the second gradient reactor, and the third gradient reactor each have the same arm force representing the entire reactor.

[0019] In one optional embodiment, the pore size gradient of the PTFE composite membrane includes 50 nm, 200 nm, and 500 nm.

[0020] In one optional embodiment, the pressure range of the first pressure region is 0.4 MPa to 0.55 MPa;

[0021] The pressure range of the second pressure zone is 0.18MPa to 0.22MPa.

[0022] By employing the above technical solution, the copper sulfate wastewater treatment system of the present invention has at least the following advantages:

[0023] The copper sulfate wastewater treatment system provided in this embodiment of the invention utilizes a spiral guide plate in a three-stage reactor to create a turbulent flow region with a swirling field strength ≥5 m / s between the copper sulfate wastewater and the catalyst. The second-gradient reactor is equipped with a pH detection module, allowing adjustment of the N,N-dimethylformamide injection rate based on real-time pH values. The third-gradient reactor features a PTFE composite membrane with varying pore sizes, which can be used to retain and reuse unreacted catalyst. A dual-pressure distillation unit increases the gas-liquid contact area and improves reaction efficiency. An electro-adsorption module in the centrifugal unit adsorbs residual cationic polyacrylamide (CPAM). The copper sulfate wastewater treatment system provided in this embodiment of the invention has a simple structure, high resource recovery rate for copper sulfate, low impurity and high purity hydrochloric acid recovery, a simple process flow, and is environmentally friendly.

[0024] In summary, the unique copper sulfate wastewater treatment system of this invention can solve the technical problems of low resource recovery rate, high impurity and low purity in hydrochloric acid recovery, complex process flow, environmental unfriendliness, and high technical cost, making it more suitable for practical use and possessing industrial application value. It possesses numerous advantages and practical value, and no similar design has been publicly disclosed or used in similar copper sulfate wastewater treatment systems, thus it is truly innovative. It represents a significant improvement in both the system itself and its functionality, demonstrating substantial technological advancement and producing user-friendly and practical results. Compared to existing copper sulfate wastewater treatment systems, it offers several enhanced functions, making it more suitable for practical use and possessing broad industrial application value. It is indeed a novel, progressive, and practical new design.

[0025] In summary, the unique copper sulfate wastewater treatment system of this invention utilizes a spiral guide plate in a three-stage reactor to create a turbulent flow region with a swirling field strength ≥5 m / s between the copper sulfate wastewater and the catalyst. The second-gradient reactor is equipped with a pH detection module, allowing adjustment of the N,N-dimethylformamide injection rate based on real-time pH values. The third-gradient reactor features a PTFE composite membrane with varying pore sizes, facilitating the retention and reuse of unreacted catalyst. A dual-pressure distillation unit increases the gas-liquid contact area and reaction efficiency. An electro-adsorption module within the centrifugal unit adsorbs residual cationic polyacrylamide (CPAM). The copper sulfate wastewater treatment system provided by this invention has a simple structure, high copper sulfate resource recovery rate, low impurity and high purity hydrochloric acid recovery rate, simple process flow, and is environmentally friendly. It possesses numerous advantages and practical value, and is truly innovative as no similar design has been publicly disclosed or used in the same copper sulfate wastewater treatment system. It represents a significant improvement in both the copper sulfate wastewater treatment system and its functions, demonstrating substantial technological advancement and producing user-friendly and practical results. Moreover, it offers enhanced functionality compared to existing copper sulfate wastewater treatment systems, making it more suitable for practical use and possessing broad industrial application value. It is indeed a novel, progressive, and practical new design.

[0026] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] The specific copper sulfate wastewater treatment system of the present invention is given in detail in the following embodiments and accompanying drawings. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the copper sulfate wastewater treatment system provided in an embodiment of the present invention.

[0029] Figure label:

[0030] 1-Three-stage reaction vessel, 2-Dual-pressure distillation tower, 3-Centrifuge unit, 4-Preheater, 5-Hydrochloric acid absorption tower, 6-Acid storage tank, 7-Copper sulfate storage tank, 8-Suspension separator. Detailed Implementation

[0031] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description of the specific implementation method and effects of the copper sulfate wastewater treatment system proposed according to the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0032] Please see Figure 1This invention provides a copper sulfate wastewater treatment system, comprising: a three-stage reaction vessel 1, a dual-pressure distillation tower 2, and a centrifuge unit 3.

[0033] The three-stage reactor 1 includes at least three gradient reactors. The first gradient reactor is a spiral guide plate, which can make the copper sulfate wastewater and catalyst form a turbulent flow region with a swirling field strength of ≥5m / s. The second gradient reactor is equipped with a pH detection module, which is used to adjust the injection rate of the catalyst N,N-dimethylformamide according to the real-time pH value. The third gradient reactor is equipped with a PTFE composite membrane with varying pore size for the retention and reuse of unreacted catalyst. The first gradient reactor, the second gradient reactor, and the third gradient reactor are arranged sequentially from top to bottom along the reactor.

[0034] The dual-pressure distillation column 2 is connected to the three-stage reactor 1. The dual-pressure distillation column 2 includes a first pressure zone and a second pressure zone that are interconnected, wherein the pressure in the first pressure zone is greater than the pressure in the second pressure zone.

[0035] Centrifuge unit 3 is connected to dual-pressure distillation tower 2. The outlet of centrifuge unit 3 is equipped with a guide channel, and an electro-adsorption module is installed in the guide channel to adsorb residual cationic polyacrylamide.

[0036] This novel copper sulfate wastewater treatment system has at least the following advantages:

[0037] The copper sulfate wastewater treatment system provided in this embodiment of the invention utilizes a spiral guide plate in the three-stage reactor 1 to create a turbulent flow region with a swirling field strength ≥5m / s between the copper sulfate wastewater and the catalyst. A pH detection module is installed on the second-gradient reactor, allowing adjustment of the N,N-dimethylformamide injection rate based on real-time pH values. A PTFE composite membrane with varying pore sizes is installed on the third-gradient reactor for the retention and reuse of unreacted catalyst. A dual-pressure distillation unit increases the gas-liquid contact area and reaction efficiency. An electro-adsorption module in the centrifuge unit 3 adsorbs residual cationic polyacrylamide (CPAM). The copper sulfate wastewater treatment system provided in this embodiment of the invention features a simple structure, high resource recovery rate for copper sulfate, low impurity and high purity hydrochloric acid recovery, a simple process flow, and is environmentally friendly.

[0038] It should be noted that the copper sulfate wastewater to be treated in this embodiment of the invention can be derived from copper sulfate wastewater generated during the production of sodium saccharin. Furthermore, the catalysts used in this embodiment include N,N-dimethylformamide, cationic polyacrylamide, and polyaluminum sulfate.

[0039] In one optional embodiment, a steam jet pump is provided in the first pressure region, and the nozzle angle of the steam jet pump is 55° to 57°. For example, when the nozzle angle of the steam jet pump is between 55° and 57°, the range of gas-liquid contact is maximized, improving gas-liquid contact efficiency and thus improving reaction efficiency.

[0040] In an optional embodiment, a preheater 4 and a suspension separator 8 are also included. The preheater 4 is connected to the three-stage reactor 1 and is used to preheat the copper sulfate wastewater and the catalyst.

[0041] The suspension separator 8 is connected to the three-stage reactor 1, and the suspension separator 8 is used to separate the liquid and gas in the three-stage reactor 1.

[0042] In an optional embodiment, a hydrochloric acid absorption tower 5 is further included, which is connected to a dual-pressure distillation tower 2 for absorbing evaporated hydrochloric acid gas.

[0043] In an optional embodiment, an acid storage tank 6 is also included, which is connected to a hydrochloric acid absorption tower 5 for storing the desorbed hydrochloric acid.

[0044] In an optional embodiment, a copper sulfate storage tank 7 is also included for storing processed copper sulfate crystals.

[0045] In one alternative embodiment, the first gradient reactor, the second gradient reactor, and the third gradient reactor each have the same arm force representing the entire reactor.

[0046] In one alternative embodiment, the pore size gradient of the PTFE composite membrane includes 50 nm, 200 nm, and 500 nm.

[0047] In one optional embodiment, the pressure range of the first pressure zone is 0.4 MPa to 0.55 MPa; and the pressure range of the second pressure zone is 0.18 MPa to 0.22 MPa.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the methods and techniques disclosed above without departing from the scope of the present invention to create equivalent embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A copper sulfate wastewater treatment system, characterized in that, include: The three-stage reactor comprises at least three gradient reactors. The first gradient reactor is a spiral guide plate, which enables the copper sulfate wastewater and catalyst to form a turbulent flow region with a swirling field strength ≥5m / s. The second gradient reactor is equipped with a pH detection module, which is used to adjust the injection rate of the N,N-dimethylformamide catalyst based on the real-time pH value. The third gradient reactor is equipped with a PTFE composite membrane with varying pore size for the retention and reuse of unreacted catalyst. The first, second, and third gradient reactors are arranged sequentially from top to bottom along the reactor. A dual-pressure distillation column is connected to the three-stage reactor. The dual-pressure distillation column includes a first pressure zone and a second pressure zone that are interconnected, wherein the pressure in the first pressure zone is greater than the pressure in the second pressure zone. A centrifuge unit is connected to the dual-pressure distillation column. The outlet of the centrifuge unit is provided with a guide channel, and an electro-adsorption module is provided in the guide channel for adsorbing residual cationic polyacrylamide.

2. The copper sulfate wastewater treatment system according to claim 1, characterized in that, The first pressure zone is equipped with a steam jet pump, and the nozzle inclination angle of the steam jet pump is 55° to 57°.

3. The copper sulfate wastewater treatment system according to claim 1, characterized in that, It also includes a preheater; the preheater is connected to the three-stage reactor and is used to preheat the copper sulfate wastewater and the catalyst.

4. The copper sulfate wastewater treatment system according to claim 1, characterized in that, It also includes a suspension separator, which is connected to the tertiary reactor and is used to separate liquid and gas in the tertiary reactor.

5. The copper sulfate wastewater treatment system according to claim 1, characterized in that, It also includes a hydrochloric acid absorption tower, which is connected to the dual-pressure distillation tower and is used to absorb the evaporated hydrochloric acid gas.

6. The copper sulfate wastewater treatment system according to claim 5, characterized in that, It also includes an acid storage tank, which is connected to the hydrochloric acid absorption tower, which is used to store the desorbed hydrochloric acid.

7. The copper sulfate wastewater treatment system according to claim 1, characterized in that, It also includes a copper sulfate storage tank for storing processed copper sulfate crystals.

8. The copper sulfate wastewater treatment system according to claim 1, characterized in that, The first gradient reactor, the second gradient reactor, and the third gradient reactor each have the same arm force relative to the entire reactor.

9. The copper sulfate wastewater treatment system according to claim 1, characterized in that, The pore size gradient of the PTFE composite membrane includes 50 nm, 200 nm and 500 nm.

10. The copper sulfate wastewater treatment system according to claim 1, characterized in that, The pressure range of the first pressure zone is 0.4 MPa to 0.55 MPa; The pressure range of the second pressure zone is 0.18MPa to 0.22MPa.

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