Sodium sulfite supplement device for trichloroethylene tail water treatment

Abstract

The utility model provides a kind of sodium sulfite supplementing device for trichloroethylene tail water treatment, it is related to trichloroethylene tail water treatment technical field. Including tail water pool and stirring assembly, tail water pool is equipped with ORP monitor, further including sodium sulfite dissolving component, sodium sulfite solution conveying component and control module, sodium sulfite dissolving component includes dissolving tank, sodium sulfite solution conveying component includes solution conveying pipe and be equipped at solution conveying pipe Solution electric control regulating valve, solution conveying pipe is connected between tail water pool and dissolving tank;ORP monitor, solution electric control regulating valve are electrically connected with control module. Adopt the utility model, sodium sulfite can be dissolved first in dissolving tank and then accurately added into tail water pool, the amount of dosing can be adjusted in real time according to the situation of chemical reaction, secondary pollution caused by excessive or insufficient addition of sodium sulfite, incomplete tail water treatment or the occurrence of production cost increase situation is prevented, and the efficiency of trichloroethylene tail water treatment is improved.

Description

Technical Field

[0001] This utility model relates to the field of trichloroethylene wastewater treatment technology, and more specifically, to a sodium sulfite replenishment device for trichloroethylene wastewater treatment. Background Technology

[0002] Trichloroethylene (TCE) is a commonly used organic solvent in industrial cleaning and metal degreasing. Oxidizing pollutants remaining in its effluent (such as chlorinated organics and dissolved residual chlorine) need to be degraded through reduction reactions. Sodium sulfite, due to its strong reducing properties, is widely used for dechlorination and heavy metal ion reduction in such effluents.

[0003] In existing technologies, the replenishment of sodium sulfite in trichloroethylene wastewater treatment typically involves manually adding solid sodium sulfite directly to the wastewater tank or dissolving the solid sodium sulfite and then pumping it to the wastewater tank. This method has the following main problems:

[0004] 1. Manual dosing has low precision, which can easily lead to excessive or insufficient sodium sulfite, causing secondary pollution, incomplete wastewater treatment, or increased production costs.

[0005] 2. The static mixing effect of sodium sulfite with the effluent is poor, and the reaction between the reagent and the effluent is insufficient;

[0006] 3. The tailwater ORP monitoring (oxidation-reduction potential) is not linked to the dosing system, making it impossible to adjust the dosing amount in real time.

[0007] A utility model patent with Chinese authorization announcement number CN215102613U discloses a trichloroethylene wastewater treatment device. This device features a motor fixedly installed at the center of the top of a casing. The motor's output shaft is connected to a stirring blade via a first rotating rod. Stirring rods are fixedly connected to both sides of the stirring blade, achieving a stirring and neutralization effect. This accelerates the treatment efficiency of trichloroethylene wastewater, saving time and cost. It solves the problem that existing treatment devices directly process the wastewater and lack the function of neutralizing and stirring it, making the treatment process cumbersome and reducing efficiency. While this prior art can improve the static mixing effect of sodium sulfite and wastewater through stirring, precise control of the addition of sodium sulfite to ensure the full reaction of residual oxidizing pollutants in the wastewater is crucial for the stable operation of the device. Utility Model Content

[0008] The purpose of this invention is to provide a sodium sulfite replenishment device for trichloroethylene tailwater treatment. The device can dissolve sodium sulfite in a dissolving tank before precisely adding it to the tailwater tank. The dosage can be adjusted in real time according to the chemical reaction, preventing secondary pollution, incomplete tailwater treatment, or increased production costs caused by excessive or insufficient sodium sulfite addition, thereby improving the efficiency of trichloroethylene tailwater treatment.

[0009] The technical solution adopted in this utility model is as follows:

[0010] This application provides a sodium sulfite replenishment device for trichloroethylene tailwater treatment, including a tailwater tank and a stirring assembly disposed in the tailwater tank. The stirring assembly is used to stir the liquid in the tailwater tank. The tailwater tank is equipped with an ORP monitor, and further includes:

[0011] A sodium sulfite dissolving assembly, comprising a dissolving tank having a material addition port;

[0012] A sodium sulfite solution delivery assembly includes a solution delivery pipe and a solution electronically controlled regulating valve located on the solution delivery pipe. The solution delivery pipe is connected between the tailwater tank and the dissolving tank.

[0013] The control module, ORP monitor, and solution electro-controlled regulating valve are all electrically connected to the control module.

[0014] Furthermore, in some embodiments of this invention, the sodium sulfite dissolution assembly further includes a heater located inside the dissolution tank.

[0015] Furthermore, in some embodiments of this utility model, the sodium sulfite dissolving assembly further includes a first drive motor disposed in the dissolving tank and a first stirring paddle disposed in the drive shaft of the first drive motor, the first stirring paddle being located inside the dissolving tank.

[0016] Furthermore, in some embodiments of this utility model, the sodium sulfite replenishment device further includes:

[0017] An inert gas adding component includes an inert gas delivery pipe and a gas electronically controlled regulating valve disposed on the inert gas delivery pipe, the inert gas delivery pipe being connected to a dissolving tank;

[0018] The dissolving tank is equipped with a pressure transmitter, and both the pressure transmitter and the gas electronic control regulating valve are electrically connected to the control module.

[0019] Furthermore, in some embodiments of this utility model, the dissolving tank is equipped with a breather valve.

[0020] Furthermore, in some embodiments of this utility model, the sodium sulfite replenishment device further includes:

[0021] A solution addition assembly includes a solution delivery pipe and a solution electronically controlled regulating valve located on the solution delivery pipe, the solution delivery pipe being connected to a dissolving tank;

[0022] The dissolving tank is equipped with an electronic level gauge, and both the electronic level gauge and the electrically controlled regulating valve for the dissolving liquid are electrically connected to the control module.

[0023] Furthermore, in some embodiments of this utility model, the stirring assembly includes a second drive motor disposed in the tailrace tank and a second stirring blade disposed in the drive shaft of the second drive motor, the second stirring blade being located inside the tailrace tank.

[0024] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0025] This application involves adding sodium sulfite and other materials into a dissolving tank to form a sodium sulfite solution. Simultaneously, the sodium sulfite solution is transported through a solution delivery pipe into a tailwater tank to treat trichloroethylene tailwater. During treatment, a stirring component agitates the mixed liquid in the tailwater tank, ensuring a thorough reaction between the sodium sulfite and the tailwater. Meanwhile, an ORP (oxidation-reduction potential) monitors the redox potential of the liquid in the tailwater tank in real time and transmits the relevant electrical signal data to a control module. The control module controls the opening of the solution's electrically controlled regulating valve, thereby precisely adjusting the sodium sulfite solution delivered through the solution delivery pipe. This allows for real-time adjustment of the dosage based on the chemical reaction, preventing secondary pollution, incomplete tailwater treatment, or increased production costs caused by excessive or insufficient sodium sulfite addition, thus improving the efficiency of trichloroethylene tailwater treatment. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the sodium sulfite replenishment device provided in an embodiment of the present invention.

[0028] icon:

[0029] 10 - Tailwater tank; 11 - ORP monitor;

[0030] 20 - Stirring assembly; 21 - Second drive motor; 22 - Second stirring paddle;

[0031] 30-Sodium sulfite dissolving assembly; 31-Dissolving tank; 311-Sealing cover; 32-Heater; 33-First drive motor; 34-First agitator; 35-Pressure transmitter; 36-Breath valve; 37-Electronic level gauge;

[0032] 40 - Sodium sulfite solution delivery assembly; 41 - Solution delivery pipe; 42 - Solution electronic control valve;

[0033] 50 - Inert gas addition assembly; 51 - Inert gas delivery pipe; 52 - Gas electronic control regulating valve;

[0034] 60 - Solution addition component; 61 - Solution delivery pipe; 62 - Solution electronic control regulating valve. Detailed Implementation

[0035] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0036] Example

[0037] Please refer to Figure 1 This embodiment provides a sodium sulfite replenishment device for trichloroethylene tailwater treatment, including a tailwater tank 10 and a stirring assembly 20 disposed in the tailwater tank 10. The tailwater tank 10 is used for temporary storage of trichloroethylene tailwater, and the stirring assembly 20 is used to stir the liquid in the tailwater tank 10. The tailwater tank 10 is equipped with an ORP monitor 11. The ORP monitor is an existing product, an industrial instrument used to monitor the oxidation-reduction potential (ORP) and temperature of a solution. It uses a Chinese LCD display and a Chinese menu-driven operation interface. Models include ORP-2096 and HI991003, manufactured by companies such as Shanghai Boqu Instrument Co., Ltd. and HANNA. This equipment is mainly used in environmental monitoring, petrochemical, biopharmaceutical, and water treatment fields, and can continuously monitor the solution potential value online. In this embodiment, the ORP monitor 11 is installed in the tailwater tank 10 and monitors the oxidation-reduction potential of the liquid in the tailwater tank 10 in real time.

[0038] The system also includes a sodium sulfite dissolving assembly 30, a sodium sulfite solution conveying assembly 40, and a control module. The sodium sulfite dissolving assembly 30 includes a dissolving tank 31, which is installed above the tailwater tank 10. The dissolving tank 31 has a material inlet, which can be sealed with a corresponding sealing cap 311. The sodium sulfite solution conveying assembly 40 includes a solution conveying pipe 41 and a solution electrically controlled regulating valve 42 located on the solution conveying pipe 41. The solution conveying pipe 41 connects the tailwater tank 10 and the dissolving tank 31. The ORP monitor 11 and the solution electrically controlled regulating valve 42 are both electrically connected to the control module. The control module can use an existing distributed control system (DCS). Distributed control systems are control systems in the field of industrial automation, also known as distributed control systems, and are widely used in industries such as power, metallurgy, and petrochemicals.

[0039] In the specific implementation process, sodium sulfite and other materials can be added into the dissolving tank 31 through the material addition port to form a sodium sulfite solution. At the same time, the sodium sulfite solution is transported into the tailwater tank 10 through the solution delivery pipe 41 to treat the trichloroethylene tailwater. During the treatment process, the stirring component 20 stirs the mixed liquid in the tailwater tank 10 to ensure that the sodium sulfite and tailwater react fully after mixing.

[0040] Meanwhile, the ORP monitor 11 monitors the redox potential of the liquid in the tailwater tank 10 in real time and transmits the relevant electrical signal data to the control module. The control module is used to control the opening of the solution electro-controlled regulating valve 42, thereby precisely regulating the sodium sulfite solution transported by the solution delivery pipe 41.

[0041] In the initial stage of the reaction, the redox potential of the liquid in the tailwater tank 10 is high, and the control module controls the opening of the solution electronically controlled regulating valve 42 to be large, resulting in a large flow rate of sodium sulfite solution. As the reaction proceeds, the redox potential monitored by the ORP monitor 11 gradually decreases. When it decreases to the set threshold, it indicates that the tailwater treatment is complete. At this point, the control module controls the solution electronically controlled regulating valve 42 to close, and no more sodium sulfite solution is supplied into the tailwater tank 10.

[0042] Thus, the sodium sulfite replenishment device provided in this application first dissolves sodium sulfite in the dissolving tank 31 and then precisely adds it to the tailwater tank 10. The dosage can be adjusted in real time according to the chemical reaction, preventing secondary pollution, incomplete tailwater treatment, or increased production costs caused by excessive or insufficient sodium sulfite addition, thereby improving the efficiency of trichloroethylene tailwater treatment.

[0043] Optionally, the solution delivery pipe 41 in this embodiment is made of corrosion-resistant and smooth-surfaced polypropylene (PP), polytetrafluoroethylene (PTFE), or polyvinylidene fluoride (PVDF), which can reduce the risk of crystallization blockage of the solution delivery pipe 41 affecting continuous operation.

[0044] like Figure 1 As shown, in some embodiments, the sodium sulfite dissolving assembly 30 further includes a heater 32, which is located inside the dissolving tank 31. In this embodiment, the heater 32 can be an electric heating plate, heating coil, or similar product. By providing the heater 32, when sodium sulfite is added into the dissolving tank 31 for dissolution, the heater 32 can heat the dissolving tank 31, thereby improving the efficiency of sodium sulfite dissolution and facilitating the complete dissolution of solid sodium sulfite.

[0045] like Figure 1 As shown, in some embodiments, the sodium sulfite dissolving assembly 30 further includes a first drive motor 33 disposed in the dissolving tank 31 and a first stirring paddle 34 disposed on the drive shaft of the first drive motor 33, the first stirring paddle 34 being located inside the dissolving tank 31. During the sodium sulfite dissolving process, the first drive motor 33 can be activated to drive the first stirring paddle 34 to rotate, thereby stirring the solution and improving the efficiency of sodium sulfite dissolution, facilitating the complete dissolution of solid sodium sulfite.

[0046] When sodium sulfite comes into contact with air, the air oxidizes it, turning it into sodium sulfate. To prevent sodium sulfite from being oxidized by air before it dissolves, such as... Figure 1 As shown, in some embodiments, the sodium sulfite replenishment device further includes an inert gas addition component 50, which includes an inert gas delivery pipe 51 and a gas electrically controlled regulating valve 52 disposed on the inert gas delivery pipe 51. The inert gas delivery pipe 51 is connected to the dissolving tank 31. The dissolving tank 31 is provided with a pressure transmitter 35 and a breather valve 36. Both the pressure transmitter 35 and the gas electrically controlled regulating valve 52 are electrically connected to the control module.

[0047] In this embodiment, one end of the inert gas delivery pipe 51 is used for inert gas input. Nitrogen gas can be used as the inert gas. The inert gas is delivered into the dissolving tank 31 through the inert gas delivery pipe 51, occupying the internal cavity of the dissolving tank 31 and preventing air from oxidizing the sodium sulfite. Simultaneously, the pressure transmitter 35 monitors the pressure inside the dissolving tank 31 in real time and transmits the data to the control module. When the pressure is lower than a set threshold, the control module controls the gas electronically controlled regulating valve 52 to open, allowing nitrogen gas to enter the dissolving tank 31 through the inert gas delivery pipe 51. Once the pressure inside the dissolving tank 31 reaches the threshold, the control module controls the gas electronically controlled regulating valve 52 to close. If the pressure inside the dissolving tank 31 is too high, excess gas can be discharged from the dissolving tank 31 through the breather valve 36.

[0048] like Figure 1 As shown, in some embodiments, the sodium sulfite replenishment device further includes a solution addition component 60, which includes a solution delivery pipe 61 and a solution electrically controlled regulating valve 62 disposed on the solution delivery pipe 61. The solution delivery pipe 61 is connected to the dissolving tank 31. The dissolving tank 31 is equipped with an electronic level gauge 37. Both the electronic level gauge 37 and the solution electrically controlled regulating valve 62 are electrically connected to the control module.

[0049] This invention, by incorporating a dissolving solution addition component 60, allows for the delivery of a suitable dissolving solution into a dissolving tank 31 via a dissolving solution delivery pipe 61 when dissolving sodium sulfite. Industrial water can be used as the input dissolving solution. Simultaneously, an electronic level gauge 37 monitors the solution level in the dissolving tank 31 in real time and transmits the data to a control module. When the solution level falls below a threshold, the control module opens the electrically controlled dissolving solution regulating valve 62 to allow external industrial water to be delivered into the dissolving tank 31 via the dissolving solution delivery pipe 61. When the solution level reaches the threshold, the control module closes the electrically controlled dissolving solution regulating valve 62, thus achieving automatic level control in the dissolving tank 31.

[0050] like Figure 1 As shown, in some embodiments, the stirring assembly 20 includes a second drive motor 21 disposed in the tailwater tank 10 and a second stirring paddle 22 disposed in the drive shaft of the second drive motor 21, the second stirring paddle 22 being located inside the tailwater tank 10. During the trichloroethylene tailwater treatment process, the second drive motor 21 can drive the second stirring paddle 22 to rotate, and the second stirring paddle 22 can stir the mixed liquid in the tailwater tank 10 to ensure that the sodium sulfite solution and the tailwater are in full contact and react, thereby improving the reaction efficiency.

[0051] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0052] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A sodium sulfite replenishment device for trichloroethylene tailwater treatment, comprising a tailwater tank (10) and a stirring assembly (20) disposed in the tailwater tank (10), the stirring assembly (20) being used to stir the liquid in the tailwater tank (10); characterized in that, The tailrace tank (10) is equipped with an ORP monitoring instrument (11), and also includes: Sodium sulfite dissolving assembly (30), which includes a dissolving tank (31) having a material addition port; Sodium sulfite solution delivery assembly (40) includes a solution delivery pipe (41) and a solution electronic control regulating valve (42) disposed on the solution delivery pipe (41), the solution delivery pipe (41) being connected between the tailwater tank (10) and the dissolving tank (31); The control module is electrically connected to both the ORP monitor (11) and the solution electronic control valve (42).

2. The sodium sulfite replenishment device for trichloroethylene tailwater treatment according to claim 1, characterized in that, The sodium sulfite dissolving assembly (30) also includes a heater (32) located inside the dissolving tank (31).

3. The sodium sulfite replenishment device for trichloroethylene tailwater treatment according to claim 1, characterized in that, The sodium sulfite dissolving assembly (30) further includes a first drive motor (33) disposed in the dissolving tank (31) and a first stirring paddle (34) disposed on the drive shaft of the first drive motor (33), the first stirring paddle (34) being located inside the dissolving tank (31).

4. The sodium sulfite replenishment device for trichloroethylene tailwater treatment according to claim 1, characterized in that, The sodium sulfite replenishment device also includes: An inert gas adding component (50) includes an inert gas delivery pipe (51) and a gas electronically controlled regulating valve (52) disposed on the inert gas delivery pipe (51), wherein the inert gas delivery pipe (51) is connected to the dissolving tank (31); The dissolving tank (31) is equipped with a pressure transmitter (35), and both the pressure transmitter (35) and the gas electronic control regulating valve (52) are electrically connected to the control module.

5. The sodium sulfite replenishment device for trichloroethylene tailwater treatment according to claim 4, characterized in that, The dissolving tank (31) is equipped with a breather valve (36).

6. The sodium sulfite replenishment device for trichloroethylene tailwater treatment according to claim 1, characterized in that, The sodium sulfite replenishment device also includes: The dissolving solution addition assembly (60) includes a dissolving solution delivery pipe (61) and a dissolving solution electronically controlled regulating valve (62) disposed on the dissolving solution delivery pipe (61), wherein the dissolving solution delivery pipe (61) is connected to the dissolving tank (31); The dissolving tank (31) is equipped with an electronic level gauge (37), and both the electronic level gauge (37) and the electronically controlled regulating valve (62) are electrically connected to the control module.

7. The sodium sulfite replenishment device for trichloroethylene tailwater treatment according to claim 1, characterized in that, The stirring assembly (20) includes a second drive motor (21) disposed in the tailwater tank (10) and a second stirring paddle (22) disposed on the drive shaft of the second drive motor (21), the second stirring paddle (22) being located inside the tailwater tank (10).

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