Baffled Sodium Hypochlorite Generator Electrolyzer

Abstract

The present invention discloses a baffled sodium hypochlorite generator electrolytic cell. An upper anode, an upper rubber gasket, a cathode, a lower rubber gasket, and a lower anode are sequentially installed from top to bottom in an insulating electrolytic cell composed of upper and lower tank bodies; the anode is fixed to the inner groove of the upper and lower tank bodies by a nylon screw, and the cathode is fixed by pressing the upper and lower tank bodies, and the positive and negative electrodes are connected to a DC power supply; the adjacent electrodes and the rubber gasket form an electrolysis reaction chamber, and together with the electrolyte in the chamber, form an electrolysis unit, and a narrow slit is provided on the right side of the cathode to connect the front and rear electrolysis units to form a baffle. The present invention has a narrow electrode spacing, less heat release during the electrolysis process, and can effectively control the temperature of the electrolytic cell without adding a heat exchanger to avoid high-temperature decomposition of the sodium hypochlorite product; the process is long, and through the baffled structure, the salt water can be fully electrolyzed, reducing salt consumption, effectively improving the chlorine production efficiency, and reducing the volume of the electrolytic cell. The present invention is suitable for the disinfection link of rural drinking water projects.

Description

Technical Field

[0001] The invention relates to a sodium hypochlorite generator electrolytic cell, in particular to a baffled sodium hypochlorite generator electrolytic cell suitable for rural drinking water disinfection projects. Technical Background

[0002] Disinfection is the weak link in my country's rural drinking water projects, and it is also the last guarantee for drinking water safety. Sodium hypochlorite, as a strong oxidant and disinfectant, can be produced by on-site electrolysis of salt water using a sodium hypochlorite generator. The raw materials are easy to purchase, the cost is low, and the safety is high, making it suitable for rural drinking water projects.

[0003] The electrolytic cell is the core of the sodium hypochlorite generator, and its structural design directly affects the performance of the sodium hypochlorite generator. The traditional sodium hypochlorite generator electrolytic cell has two main problems: 1. Single-channel direct current structure, short process and low efficiency. 2. The distance between the positive and negative plates of the electrolytic cell is large, the voltage is high during electrolysis, and the energy consumption is large. At the same time, the electrolysis reaction is an exothermic process. As the electrolysis proceeds, a large amount of heat is generated, the temperature of the electrolytic cell rises, and the sodium hypochlorite product decomposes. The above defects have seriously affected the promotion and application of sodium hypochlorite generators in the field of rural drinking water disinfection.

[0004] The authorized patent (ZL201120308440.5) introduces a tubular electrolyzer, but the tubular structure electrode has production and installation errors, the plate spacing is large, and the electrolysis process generates serious heat; at the same time, the horizontal installation causes the hydrogen produced to be discharged to the upper part of the electrolyzer, the gas is difficult to discharge, the voltage increases, and the energy consumption increases. The publication number is CN109778219A, which introduces an electrolyzer assembly for a sodium hypochlorite generator. It optimizes the traditional sodium hypochlorite generator and solves the problem of heat generation during the electrolysis process by adding a heat exchanger, but it also leads to problems such as complex electrolyzer structure and cumbersome installation and disassembly. Summary of the invention

[0005] In order to overcome the problems existing in the above-mentioned background technology, the purpose of the present invention is to provide a small-sized, low-energy-consuming, high-chlorine-producing-efficiency baffled sodium hypochlorite generator electrolytic cell capable of effectively controlling the temperature of the electrolytic cell, so as to be used in the disinfection link of rural drinking water projects.

[0006] The technical solution adopted by the present invention is:

[0007] The electrolytic cell of the present invention comprises: an insulating cell body composed of an upper cell body and a lower cell body;

[0008] The upper tank body has stepped square grooves on its lower end from bottom to top, the upper anode is installed at the bottom of the inner groove, and the upper rubber gasket is installed at the outer groove; the lower tank body has stepped square grooves on its upper end from top to bottom, the lower anode is installed at the bottom of the inner groove, and the lower rubber gasket is installed at the outer groove; a cathode is installed between the upper rubber gasket and the lower rubber gasket, and a detachable sealing connection is formed by fastening screws around them;

[0009] A liquid discharge port is provided on the left side of the upper tank body, a liquid inlet is provided on the left side of the lower tank body, and anode conductive components with the same structure are respectively installed on the upper and lower sides of the right electrolytic cell, which are connected to the DC power supply with the respective upper anode and lower anode, and a cathode conductive component is installed on the right electrolytic cell, which is connected to the DC power supply;

[0010] The upper anode, cathode and upper rubber gasket form an upper electrolysis cavity, which together with the electrolytic solution in the upper electrolysis cavity constitute an upper electrolysis unit. The lower anode, cathode and lower rubber gasket form a lower electrolysis cavity, which together with the electrolytic solution in the lower electrolysis cavity constitute a lower electrolysis unit. A narrow slit is provided on the right side of the cathode plate to connect the upper and lower electrolysis units.

[0011] The anode conductive components with the same structure all include: a cross-shaped special-shaped stud, a conductive gasket, a conductive nut, silver glue, a sealing ring and a fastening nut. The cross-shaped special-shaped stud and the sealing ring are installed in the corresponding slot holes of the upper and lower slot bodies; the conductive nuts are welded to the respective upper anodes and lower anodes; and the silver glue is respectively filled in the gaps between the conductive nuts and the respective upper and lower slot bodies.

[0012] The cathode conductive assembly comprises: a cathode conductive stud, a right conductive nut and a right fastening nut. The right conductive nut is placed in a corresponding slot hole of the lower slot body and contacts the cathode.

[0013] The liquid inlet is arranged on the left side of the lower tank body and is connected to the lower anode liquid inlet hole.

[0014] The liquid discharge port is arranged on the left side of the upper tank body and is connected to the upper anode liquid outlet hole.

[0015] The upper anode and the lower anode are DSA chlorine evolution anodes, and are fixed to the bottom of the groove in the upper tank body and the bottom of the groove in the lower tank body respectively by nylon screws.

[0016] The present invention has the following beneficial effects:

[0017] 1) The electrode spacing is narrow. The anode is fixed by a nylon nut and the spacing between the positive and negative electrodes is ensured to be in the range of 1 to 3 mm. On the one hand, the voltage of the electrolysis process is effectively reduced, thereby reducing energy consumption; on the other hand, the electrolysis process releases less heat, and the temperature of the electrolytic cell can be effectively controlled without adding heat exchangers, thereby avoiding high-temperature decomposition of the sodium hypochlorite product.

[0018] 2) The process is long. The baffled structure lengthens the electrolysis reaction process, and the salt water can be fully electrolyzed. On the one hand, the salt consumption is reduced and the chlorine production efficiency is effectively improved; on the other hand, while ensuring a certain effective electrolysis area, the volume of the electrolytic cell is reduced. The present invention is suitable for the disinfection link of rural drinking water projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0020] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0021] Figure 3 yes Figure 1 A top view of

[0022] Figure 4 is a schematic diagram of the cathode structure;

[0023] Figure 5 is a schematic diagram of the structure of the lower anode;

[0024] Figure 6 It is a schematic diagram of the structure of the upper anode.

[0025] In the figure: 1, drain port, 2, fastening screw, 3, upper tank body, 4, upper anode, 5, nylon screw, 6, conductive gasket, 7, cathode conductive stud, 8, liquid inlet, 9, lower rubber gasket, 10, cathode, 11, lower tank body, 12, lower anode, 13, conductive nut, 14, silver glue, 15, sealing ring, 16, cross-shaped special-shaped stud, 17, lower electrolysis chamber, 18, upper electrolysis chamber, 19, narrow slit, 20, fastening nut, 21, right conductive nut, 22, anode liquid inlet hole, 23, anode liquid outlet hole, 24, cathode opening, 25, upper rubber gasket, 26, right fastening nut. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] like Figure 1 , Figure 3 , Figure 4 As shown, the electrolytic cell of the present invention is an insulating cell body composed of an upper cell body 3 and a lower cell body 11;

[0028] The upper tank body 3 has stepped square grooves on its lower end from bottom to top, an upper anode 4 is installed at the bottom of the inner groove, and an upper rubber gasket 25 is installed at the outer groove. The lower tank body 11 has stepped square grooves on its upper end from top to bottom, a lower anode 12 is installed at the bottom of the inner groove, and a lower rubber gasket 9 is installed at the outer groove. A cathode 10 is installed between the upper rubber gasket 25 and the lower rubber gasket 9, and a detachable sealing connection is formed by the fastening screws 2 around them. The upper tank body 3 and the lower tank body 11 are both made of organic glass plate.

[0029] A liquid discharge port 1 is provided on the left side of the upper tank body 3, a liquid inlet 8 is provided on the left side of the lower tank body 11, and anode conductive components with the same structure are respectively installed on the upper and lower sides of the right electrolytic cell, which are connected to the DC power supply with the respective upper anode 4 and lower anode 12, and the right electrolytic cell is equipped with a cathode conductive component connected to the DC power supply;

[0030] The upper anode 4, cathode 10 and upper rubber gasket 25 form an upper electrolysis chamber 18, and together with the electrolytic solution in the upper electrolysis chamber 18, constitute an upper electrolysis unit. The lower anode 12, cathode 10 and lower rubber gasket 9 form a lower electrolysis chamber 17, and together with the electrolytic solution in the lower electrolysis chamber 17, constitute a lower electrolysis unit. A narrow slit 19 is provided on the right side of the cathode plate to connect the upper and lower electrolysis units. The electrolyte flows from the lower electrolysis chamber 17 into the upper electrolysis chamber 18 through the narrow slit 19, forming a baffle.

[0031] like Figure 1 , Figure 2 As shown, the anode conductive components with the same structure all include: a cross-shaped special-shaped stud 16, a conductive gasket 6, a conductive nut 13, a silver glue 14, a sealing ring 15 and a fastening nut 20, the cross-shaped special-shaped stud 16 and the sealing ring 15 are installed in the corresponding slot holes of the upper and lower slot bodies; the conductive nut 13 is welded to the respective upper anode 4 and lower anode 12; the silver glue 14 is respectively filled in the gaps between the conductive nut 13 and the respective upper slot body 3 and lower slot body 11.

[0032] like Figure 1 As shown, the cathode conductive component includes: a cathode conductive stud 7, a right conductive nut 21 and a right fastening nut 26. The right conductive nut 21 is placed in the corresponding slot hole of the lower slot body 11 and contacts the cathode 10. The right side of the cathode 10 is convex, and a cathode opening 24 is provided at the protruding position, which is connected to the right conductive nut 21 and the cathode conductive stud 7.

[0033] like Figure 1 , Figure 5 As shown, the liquid inlet 8 is arranged on the left side of the lower tank body 3 and is connected to the lower anode liquid inlet hole 22 .

[0034] like Figure 1 , Figure 6 As shown, the drain port 1 is arranged on the left side of the upper tank body 3 , connected to the upper anode liquid outlet hole 23 , and located near the top edge of the upper electrolysis chamber 18 .

[0035] like Figure 1 , Figure 2 As shown, the upper anode 4 and the lower anode 12 are DSA chlorine evolution anodes, and the upper anode 4 and the lower anode 12 are respectively fixed to the bottom of the groove in the upper tank body 3 and the bottom of the groove in the lower tank body 11 by nylon screws 5. The nylon screws 5 also serve as isolation support points between the anode and cathode to ensure that the inter-electrode distance is 1 to 3 mm.

[0036] The specific electrolysis process of the present invention is as follows:

[0037] During electrolysis, the dilute salt water enters the lower electrolysis chamber 17 from the liquid inlet 8, the upper anode 10 and the lower anode 12 are connected to the positive electrode of the DC power supply through the anode conductive component, and the cathode 10 is connected to the negative electrode of the DC power supply through the cathode conductive component; after power is turned on, the sodium chloride in the dilute salt water is ionized with water, hydrogen is generated on the cathode surface, a large amount of chlorine is generated on the anode surface, and the remaining OH - with Na + The salt water is electrolyzed in the lower electrolysis chamber 17 and flows into the upper electrolysis chamber 18 through the narrow slit 19 on the right side of the cathode 10. After sufficient reaction, the electrolyte containing sodium hypochlorite is discharged from the drain port 1.

Claims

1. A baffled sodium hypochlorite generator electrolytic cell, characterized in that: The electrolytic cell is an insulating cell body consisting of an upper cell body (3) and a lower cell body (11); The upper tank body (3) has stepped square grooves on its lower end from bottom to top, an upper anode (4) is mounted on the bottom of the inner groove, and an upper rubber gasket (25) is mounted on the outer groove; the lower tank body (11) has stepped square grooves on its upper end from top to bottom, a lower anode (12) is mounted on the bottom of the inner groove, and a lower rubber gasket (9) is mounted on the outer groove; a cathode (10) is mounted between the upper rubber gasket (25) and the lower rubber gasket (9), and a detachable sealing connection is formed by fastening screws (2) on all sides; The left side of the upper tank body (3) is provided with a liquid discharge port (1), the left side of the lower tank body (11) is provided with a liquid inlet port (8), the upper and lower parts of the right electrolytic cell are respectively provided with anode conductive components of the same structure, which are connected to the respective upper anode (4) and lower anode (12) with a DC power supply, and the right electrolytic cell is provided with a cathode conductive component connected with the DC power supply; The upper anode (4), the cathode (10) and the upper rubber gasket (25) form an upper electrolysis chamber (18), which together with the electrolytic solution in the upper electrolysis chamber (18) form an upper electrolysis unit. The lower anode (12), the cathode (10) and the lower rubber gasket (9) form a lower electrolysis chamber (17), which together with the electrolytic solution in the lower electrolysis chamber (17) form a lower electrolysis unit. A narrow slit (19) is provided on the right side of the cathode plate to connect the upper and lower electrolysis units.

2. The baffled sodium hypochlorite generator electrolytic cell according to claim 1, characterized in that: The anode conductive components with the same structure all comprise: a cross-shaped special-shaped stud (16), a conductive gasket (6), a conductive nut (13), a silver glue (14), a sealing ring (15) and a fastening nut (20); the cross-shaped special-shaped stud (16) and the sealing ring (15) are installed in corresponding slot holes of the upper and lower slot bodies; the conductive nut (13) is welded to the upper anode (4) and the lower anode (12) respectively; and the silver glue (14) is respectively filled in the gaps between the conductive nut (13) and the upper slot body (3) and the lower slot body (11).

3. The baffled sodium hypochlorite generator electrolytic cell according to claim 1, characterized in that: The cathode conductive assembly comprises: a cathode conductive stud (7), a right conductive nut (21) and a right fastening nut (26); the right conductive nut (21) is placed in a corresponding slot hole of the lower slot body (11) and is in contact with the cathode (10).

4. The baffled sodium hypochlorite generator electrolytic cell according to claim 1, characterized in that: The liquid inlet (8) is arranged on the left side of the lower tank body (3) and is connected to the lower anode liquid inlet hole (22).

5. The baffled sodium hypochlorite generator electrolytic cell according to claim 1, characterized in that: The liquid discharge port (1) is arranged on the left side of the upper tank body (3), connected to the upper anode liquid outlet hole (23), and is located near the top edge of the upper electrolysis chamber (18).

6. The baffled sodium hypochlorite generator electrolytic cell according to claim 1, characterized in that: The upper anode (4) and the lower anode (12) are DSA chlorine evolution anodes, and are fixed to the bottom of the inner groove of the upper tank body (3) and the bottom of the inner groove of the lower tank body (11) respectively by means of nylon screws (5).

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