Sodium hypochlorite generator electrolytic bath with pickling device

Abstract

The utility model belongs to the technical field of sodium hypochlorite generators, and particularly relates to a sodium hypochlorite generator electrolytic bath with a pickling device, which comprises a reactor and a pickling tank, a cavity is arranged inside the reactor, and one end of the reactor is connected with an input pipe. An electrolysis system which runs for a long time is easy to form scale due to deposition of mineral substances in water, so that the electrolysis efficiency is reduced, the energy consumption is increased, and the generation quality of sodium hypochlorite is influenced. The pickling solution with the specific concentration is conveyed into the reactor from the pickling tank through the pickling pipe, acidic components in the pickling solution can chemically react with scale on the inner wall of the electrolysis system, and the scale is effectively dissolved or softened, so that the scale is removed. And after the water scale is removed, the inner wall of the electrolytic bath becomes smoother, the resistance and the energy loss in the electrolysis process are reduced, and the electrolysis efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sodium hypochlorite generator technical field, specifically related to a sodium hypochlorite generator electrolytic cell with pickling device. BACKGROUND

[0002] Sodium hypochlorite solution is widely used in family and public environment as a disinfectant. Since sodium hypochlorite solution is a strong oxidant, it is not easy to store for a long time, and needs to be produced and used by sodium hypochlorite generator to solve the problem of long-term storage and transportation of sodium hypochlorite.

[0003] In the prior art, with the continuous use of the electrolytic cell, the electrolytic cell plate will slowly accumulate scale, resulting in increased heat generation of the electrolytic cell, reduced electrolytic efficiency, and even short circuit caused by electrode damage when there is too much scale. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a sodium hypochlorite generator electrolytic cell with pickling device, which aims to optimize the design of the electrolytic cell and the pickling pipeline to make the pickling range more comprehensive and the effect better, thereby improving the electrolytic efficiency of the electrolytic cell and prolonging the service life of the electrolytic cell.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A sodium hypochlorite generator electrolytic cell with pickling device, comprising a reactor and a pickling tank, the reactor has a cavity inside, one end of the reactor is connected with an input pipe, the other end of the reactor is connected with an output pipe, the output end of the output pipe is connected with a third pickling pipe, and a first manual ball valve is arranged on the third pickling pipe.

[0007] A second pickling pipe is connected to the pickling tank, a common valve is arranged on the second pickling pipe, and the output end of the second pickling pipe is communicated with the input pipe.

[0008] The reactor is used to receive working liquid, the input pipe is used to guide the working liquid into the reactor, and the output pipe is used to discharge the working liquid in the reactor.

[0009] As a preferred technical scheme, the reactor is connected with a high-frequency power supply, and the high-frequency power supply is turned on when the working liquid enters the reactor to electrolyze the working liquid in the reactor.

[0010] Further, a monitoring and alarm module is arranged on the reactor, and the monitoring and alarm module is used to monitor the operating state of the reactor.

[0011] The monitoring and alarm module comprises an electrolysis voltage monitoring module, and the electrolysis voltage monitoring module is adapted to monitor the voltage in the reactor.

[0012] Further, a third manual ball valve is arranged on the input pipe, and the third manual ball valve is suitable for opening and closing the input pipe.

[0013] Further, a first pickling pipe is further communicated with the input pipe, the first pickling pipe is communicated with a pickling tank, and a pickling pump and a one-way valve are further arranged on the first pickling pipe; wherein one end of the first pickling pipe is further communicated with a soft water pipe, the soft water pipe is connected with a soft water tank, and a backwashing valve is arranged on the soft water pipe.

[0014] Further, a second pickling pipe is further arranged, an input end of the second pickling pipe is communicated with the input pipe, an output end of the second pickling pipe is communicated with a pickling liquid discharging pipe and a liquid discharging pipe, and the pickling liquid discharging pipe is communicated with the pickling tank.

[0015] Wherein, a common valve is arranged on the second pickling pipe, a pickling liquid discharging valve is arranged on the pickling liquid discharging pipe, and a liquid discharging valve is arranged on the liquid discharging pipe, so that the pickling liquid in the reactor can be introduced into the pickling liquid discharging pipe when the pickling liquid is discharged, and the backwashing liquid in the reactor can be introduced into the liquid discharging pipe when the liquid is discharged.

[0016] Further, an output end of the third pickling pipe is communicated with the pickling liquid discharging pipe and the liquid discharging pipe.

[0017] Wherein, a second manual ball valve is arranged on the output pipe.

[0018] As described above, the beneficial effects of the present application are as follows:

[0019] The electrolytic system running for a long time is prone to scale deposition due to minerals in water, which reduces the electrolytic efficiency, increases the energy consumption, and affects the quality of sodium hypochlorite. Through the pickling pipe, the pickling liquid with a specific concentration is transported from the pickling tank to the reactor, and the acidic components in the pickling liquid can chemically react with the scale on the inner wall of the electrolytic system, effectively dissolving or softening the scale, thereby removing them. The electrode is quickly aged due to scale accumulation, the electrolytic efficiency is reduced, the equipment productivity is reduced, and the like are improved, and the electrode short circuit caused by serious scaling is reduced, the irreversible damage to the electrolytic tank is reduced, the difficulty of equipment maintenance is reduced as a whole, the equipment production efficiency is improved, and the service life of the equipment is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be described by examples and with reference to the accompanying drawings, wherein:

[0021] Figure 1 is a structural schematic view of a sodium hypochlorite generator electrolytic tank with a pickling device provided by the present application.

[0022] Reactor-1; input pipe-2; output pipe-3; high-frequency power supply-4; pickling tank-5; pickling pump-6; first pickling pipe-7; second pickling pipe-8; acid discharge valve-9; common valve-10; first manual ball valve-11; soft water pipe-12; one-way valve-13; third pickling pipe-14; second manual ball valve-15; liquid discharge valve-16; backwashing valve-17; third manual ball valve-18; acid discharge pipe-19; liquid discharge pipe-20. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.

[0024] Embodiment one

[0025] In the prior art, with the continuous use of the electrolytic cell, the electrolytic cell electrode plate will slowly and gradually accumulate water scale, resulting in increased heat generation of the electrolytic cell, reduced electrolysis efficiency, and even short circuit caused by too much water scale, causing electrode damage.

[0026] Therefore, in order to solve the above problems and realize the function of removing the water scale accumulated in the electrolytic cell to improve the electrolysis efficiency of the electrolytic cell, the utility model discloses a sodium hypochlorite generator electrolytic cell with a pickling device, which is Figure 1 , comprising a reactor 1 and a pickling tank 5, the inside of the reactor 1 is provided with a cavity, one end of the reactor 1 is connected with an input pipe 2, the other end of the reactor 1 is connected with an output pipe 3, the output end of the output pipe 3 is connected with a third pickling pipe 14, and the third pickling pipe 14 is provided with a first manual ball valve 11; the pickling tank 5 is connected with a second pickling pipe 8, the second pickling pipe 8 is provided with a common valve 10, and the output end of the second pickling pipe 8 is communicated with the input pipe 4; wherein the reactor 1 is used for receiving working liquid, the input pipe 4 is used for guiding the working liquid into the reactor 1, and the output pipe 3 is used for discharging the working liquid in the reactor 1.

[0027] When water scale accumulates in the reactor 1, the water scale in the reactor 1 needs to be pickled, and the pickling liquid can be selected from a specific concentration of pickling liquid (such as 5% hydrochloric acid or 10% citric acid, etc.), which is sent into the reactor 1 (i.e. electrolytic cell) through the first pickling pipe 7, and the acidic components in the pickling liquid can react with the water scale on the inner wall of the electrolytic system and the electrode plate to dissolve and remove it; removing the water scale can reduce the resistance between the electrodes and reduce the energy loss in the electrolysis process, and the electrolysis efficiency is thus improved.

[0028] The specific pickling process flow is as follows:

[0029] S100. Preparation: Put the pickling solution into the pickling tank 5, turn off the high-frequency power supply 4, turn off the main circuit ball valve and turn on the pickling circuit ball valve, complete the pickling preparation;

[0030] S200. Emptying: Turn on the common valve 10 and the drain valve 16, the residual working liquid in the reactor 1 is discharged through the second pickling pipe 8 and finally through the drain pipe 20, and after the working liquid is completely discharged, the common valve 10 and the drain valve 16 are closed;

[0031] S300. Acid circulation: Turn on the acid discharge valve 9 and the pickling pump 6, the pickling solution (such as citric acid) in the pickling tank 5 enters the reactor 1 through the first pickling pipe 7 and the input pipe 2, and after the pickling solution completely fills the reactor 1, it flows out from the output pipe 3, passes through the third pickling pipe 14 and finally flows back to the pickling tank 5 through the acid discharge pipe 19, maintaining the circulation of the pickling solution in the acid pickling circuit for a certain period of time (recommended 5 minutes), so that the pickling solution fully contacts the inner wall and the electrode plate of the reactor 1;

[0032] S400. Acid soaking: Turn off the acid discharge valve 9 and the pickling pump 6, and wait for a certain period of time (recommended 10 minutes), so that the pickling solution continuously soaks the reactor 1 to achieve the purpose of fully dissolving the scale accumulated on the inner wall and the electrode plate;

[0033] S500. After repeating S300 acid circulation and S400 acid soaking for a certain number of times (usually recommended 3 times according to the severity of scale), enter

[0034] S600. Acid discharge: Turn on the common valve 10 and the acid discharge valve 9, the pickling solution in the reactor 1 and the pipeline flows into the pickling tank 5 through the second pickling pipe 8 and finally through the acid discharge pipe 10, and after the pickling solution is completely discharged, the common valve 10 and the acid discharge valve 9 are closed;

[0035] S700. Backwashing: Turn on the drain valve 16 and the backwashing valve 17, the softened water enters the reactor 1 through the softened water pipe 12 and the input pipe 2, and when the softened water fills the reactor 1, it flows out from the output pipe 3, passes through the third pickling pipe 14 and finally is discharged through the drain pipe 20, and continues for a certain period of time (recommended 5 minutes) to achieve the purpose of flushing the residual waste liquid inside the reactor 1 and the pipeline.

[0036] S800. Drainage: Close the backwashing valve 17 and open the common valve 10, the residual waste liquid in the reactor 1 is discharged through the second pickling pipe 8 and finally through the drain pipe 20, and after the waste liquid is completely discharged, the common valve 10 and the drain valve 16 are closed;

[0037] S900. Turn off the pickling circuit ball valve and turn on the main circuit ball valve, and end the pickling.

[0038] It should be noted that the third manual ball valve 18 and the second manual ball valve 15 are main loop ball valves, respectively used for controlling the input of the input pipe 2 and the output of the output pipe 3, and the first manual ball valve 11 is an acid washing loop ball valve, used for controlling the circulation of the acid washing.

[0039] Example two

[0040] On the basis of example one, referring to Figure 1 , the reactor 1 is connected with a high-frequency power supply 4, and the high-frequency power supply 4 is turned on when the working liquid enters the reactor 1, so as to electrolyze the working liquid in the reactor 1. The working liquid is a dilute brine solution formed by mixing softened water and saturated brine. The reactor 1 is powered by a high-frequency direct-current power supply, and a sodium hypochlorite solution is generated after the electrolysis reaction of the current and the working liquid, so as to realize on-site preparation of sodium hypochlorite.

[0041] Further, during the electrolysis operation of the reactor 1, scale will be accumulated in the interior of the reactor 1 at the same time. At this time, it is necessary to judge the thickness of the scale in the interior of the reactor 1, that is, whether the acid washing is needed. If the acid washing is too early, the electrolysis progress will be slowed down, and if the acid washing is too late, there is a risk of short circuit. In view of this, in order to improve the control of the acid washing time by the staff, a monitoring and alarming module is arranged on the reactor 1, and the monitoring and alarming module is used for monitoring the running state of the reactor 1. The monitoring and alarming module includes an electrolysis voltage monitoring module, and the electrolysis voltage monitoring module is adapted to monitor the voltage in the reactor.

[0042] Specifically, the reactor 1 (electrolytic cell) is powered and operated in a constant current mode. The electrolysis current is basically stable at the set value when the equipment is in a steady state, and almost no fluctuation occurs. Under the same operating condition, when the electrolytic cell is gradually scaled, the inter-electrode resistance will become larger, and thus the electrolysis voltage will increase. Therefore, the electrolysis voltage value of the electrolytic cell in the steady state can be used as a basis for determining the scaling of the electrolytic cell. When the electrolysis voltage value exceeds the set threshold value, it is determined that the electrolytic cell is seriously scaled, an alarm is triggered, and acid washing is prompted. After the staff confirms, the electrolysis power is turned off, the acid washing mode is switched to the preset program, and the opening and closing of the common valve 10, the first manual ball valve 11 and the acid washing pump 6 are controlled.

[0043] For example, when the sodium hypochlorite generator is automatically started for 5 minutes each time, the electrolytic cell has completely entered a steady state of operation. At this time, the electrolysis current and the electrolysis voltage have been stable and almost no fluctuation occurs. The system takes the electrolysis voltage value collected at this time as a basis for determination. When the safety threshold value is exceeded, the system will determine that the electrolytic cell needs to be acid washed. When the equipment stops running, the system will determine the acid washing condition in the acid washing determination process, and automatically initiate an acid washing alarm.

[0044] Further, the monitoring and alarming module further comprises a timing module, which is configured to record the pickling duration of the reactor 1, the pickling duration comprising an accumulated pickling duration and a continuous pickling duration. When the reactor 1 stops electrolysis due to pickling, the timing module can start timing to record the accumulated pickling duration, and at the same time, if the single pickling process continues, the timing module will also record the continuous pickling duration.

[0045] By monitoring the accumulated pickling duration, the overall maintenance of the electrolytic cell can be understood, and over-pickling or insufficient pickling can be avoided. The monitoring of the continuous pickling duration helps to prevent the problems of over-soaking or insufficient pickling that may occur during pickling, ensuring the pickling effect while protecting the structural integrity of the electrolytic cell. In addition, the setting of the timing module also facilitates the adjustment of the pickling strategy by the staff according to the actual needs, optimizing the maintenance process of the electrolytic cell.

[0046] For example, the staff can preset a time threshold for the accumulated pickling duration and the continuous pickling duration. When the accumulated pickling duration or the continuous pickling duration is greater than the preset value, the timing module will send a prompt signal to remind the staff to pay attention to the maintenance status of the electrolytic cell. If the accumulated pickling duration is too long, it may mean that there is stubborn scale in the inner wall of the electrolytic cell that is difficult to remove, and a more effective pickling scheme or manual cleaning needs to be adopted. If the continuous pickling duration is too long, it may cause excessive erosion of the electrolytic cell material, affecting the service life of the electrolytic cell. Therefore, according to the prompt of the timing module, the staff can flexibly adjust the pickling plan to ensure that the electrolytic cell is always in the best working condition.

[0047] Embodiment Three

[0048] Based on the embodiment one, referring to Figure 1 After the pickling operation is completed, there will be residual acid in the reactor 1. If these residues are not quickly removed, they may corrode the electrolytic cell material or interfere with the stability and efficiency of the subsequent electrolysis process. By opening the backwashing valve 17, external soft water can be introduced into the reactor 1 through the soft water pipe 12 to effectively flush away the residual acid. The neutral property of soft water helps to prevent unnecessary corrosion of the electrolytic cell and ensures that the cleaning process is both gentle and efficient. After the introduction of the backwashing valve 17, the staff can start cleaning immediately after the pickling operation is completed without the need to disassemble or reconnect the pipeline. In addition, since the cleaning is automatically completed through the pipeline system, it avoids direct contact with the reactor 1, thereby reducing the operation difficulty and potential safety risks.

[0049] As a specific implementation, the input pipe 2 is also connected with a first pickling pipe 7, and one end of the first pickling pipe 7 is also connected with a soft water pipe 12, which is externally connected with a soft water tank. The soft water enters the reactor 1 through the backwashing valve 17.

[0050] Further, the one-way valve 13 can prevent the backflow of the pickling solution, ensuring one-way flow during the cleaning process.

[0051] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be mutually referred to.

[0052] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A sodium hypochlorite generator electrolytic cell with pickling device, characterized by, The utility model relates to a reactor (1) and pickling tank (5), the inside of reactor (1) is equipped with cavity, one end of reactor (1) is connected with input pipe (2), the other end of reactor (1) is connected with output pipe (3), the output end of output pipe (3) is connected with third pickling pipe (14), and first manual ball valve (11) is equipped on third pickling pipe (14); The pickling tank (5) is connected with the second pickling pipe (8), the second pickling pipe (8) is equipped with the common valve (10), and the output end of the second pickling pipe (8) is communicated with the input pipe (2); Wherein, the reactor (1) is used for receiving working fluid, the input pipe (2) is used for guiding working fluid into the reactor (1), and the output pipe (3) is used for discharging working fluid in the reactor (1).

2. The sodium hypochlorite generator electrolytic cell with pickling device according to claim 1, characterized in that, The reactor (1) is connected with high-frequency power supply (4), the high-frequency power supply (4) is opened when working fluid enters the reactor (1), and the working fluid in the reactor (1) is electrolyzed.

3. The sodium hypochlorite generator electrolytic cell with pickling device according to claim 2, characterized in that, The reactor (1) is provided with a monitoring alarm module, and the monitoring alarm module is used for monitoring the running state of the reactor (1); Wherein, the monitoring alarm module includes an electrolytic voltage monitoring module, and the electrolytic voltage monitoring module is adapted to monitor the voltage in the reactor (1).

4. The sodium hypochlorite generator electrolytic cell with pickling device according to claim 1, characterized in that, The input pipe (2) is provided with a third manual ball valve (18), and the third manual ball valve (18) is adapted to open and close the input pipe (2).

5. The sodium hypochlorite generator electrolytic cell with pickling device according to claim 3, characterized in that, The input pipe (2) is also communicated with the first pickling pipe (7), the first pickling pipe (7) is communicated with the pickling tank (5), and the first pickling pipe (7) is also provided with a pickling pump (6) and a check valve (13); Wherein, one end of the first pickling pipe (7) is also communicated with a soft water pipe (12), the soft water pipe (12) is connected with a soft water tank, and the soft water pipe (12) is provided with a backwashing valve (17).

6. The sodium hypochlorite generator electrolytic cell with pickling device according to claim 4, characterized in that, It also includes a second pickling pipe (8), the input end of the second pickling pipe (8) is communicated with the input pipe (2), the output end of the second pickling pipe (8) is communicated with the acid discharge pipe (19) and the liquid discharge pipe (20), and the acid discharge pipe (19) is communicated with the pickling tank (5); Wherein, the second pickling pipe (8) is provided with a common valve (10), the acid discharge pipe (19) is provided with an acid discharge valve (9), and the liquid discharge pipe (20) is provided with a liquid discharge valve (16), which is adapted to introduce the pickling liquid in the reactor (1) into the acid discharge pipe (19) when the acid is discharged, and introduce the backwashing liquid in the reactor (1) into the liquid discharge pipe (20) when the liquid is discharged.

7. The sodium hypochlorite generator electrolytic cell with pickling device according to claim 1, characterized in that, The output end of the third pickling pipe (14) is communicated with the acid discharge pipe (19) and the liquid discharge pipe (20); Wherein, the output pipe (3) is provided with a second manual ball valve (15).

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