CN105734601B - Electrolytic device for efficiently producing chlorine dioxide - Google Patents

Abstract

An electrolysis device for producing chlorine dioxide efficiently, which includes an electrolytic tank used to produce chlorine dioxide, a finished product storage tank used to receive the chlorine dioxide, and a temperature control system; the temperature control system includes an A coolant supply unit used to provide a coolant, a directional valve, and cooling grooves respectively arranged on the outer periphery of the electrolytic cell and the finished product storage tank. The interiors of these cooling grooves are provided with surroundings surrounding the electrolytic cell and The spiral circulation channel on the outer periphery of the finished product storage tank, under the reversing direction of the directional valve, the coolant can be controlled to flow through the spiral circulation channel of the finished product storage tank alone or sequentially through the finished product storage tank and the electrolytic The spiral circulation channel keeps the electrolytic tank and finished product storage tank in a preset temperature control state, allowing the electrolysis device to efficiently produce chlorine dioxide.

Description

Electrolysis device for efficient production of chlorine dioxide

technical field

The present invention relates to an electrolysis device for producing chlorine dioxide by electrolysis. In particular, the present invention is provided with a temperature control system that can assist the electrolysis device to efficiently produce chlorine dioxide.

Background technique

The electrolysis device is a prior art, and it can be used for metallurgy, refining, various gain coatings on the surface of workpieces, and the production of various gas products by electrochemical mechanism.

Regarding the process of producing chlorine dioxide by electrolysis, since LINDSTAEDT in the United States first published the technology of electrolytic production of chlorine dioxide using salt as raw material in 1982, it has been gradually popularized after many manufacturers have successively developed various similar production improvements; Analyzing various electrolysis production methods, it is concluded that the regulation of electrolysis power, the timing regulation of electrolysis concentration, and the temperature regulation during electrolysis are extremely important when producing chlorine dioxide by electrolysis. Ideal results and quality.

In order to prevent the temperature from rising excessively during the electrolysis operation, manufacturers have installed a cooling device on the outer edge of the electrolytic tank. The cooling device is as large as shown in FIG. A cooling water input port 135 is provided on the side, and a cooling water overflow port 136 is provided on the upper right of the box body 132, and the cooling water flows in from the cooling water input port 135 and then flows out from the cooling water overflow port 136; generally speaking, due to the The cooling water flows in from one end, and then flows out from the other end. This configuration will obviously form many cooling dead spots inside the box where the cooling water is not easy to circulate. Therefore, not only the effect is not good, but also because the cooling water must be continuously pumped for a long time Flowing is a waste of power.

In addition, in the gas-liquid mixed product storage tank that receives the chlorine dioxide released by electrolysis, due to the convection of the ambient temperature, the internal temperature of the storage tank will rise relatively; and because the boiling point of chlorine dioxide is only 11°C, Therefore, the concentration of the chlorine dioxide gas-liquid mixed solution stored in the finished product storage tank will be gasified by temperature rise, thus forming an unreasonable phenomenon that the concentration is increased by electrolysis and the concentration is decreased by gasification; this unreasonable phenomenon will not only reduce Concentration will reduce the output, and will increase the time of electrolysis operation; Unexpected increase of electrolysis operation time will destroy the optimal parameters of the above "three major items" and produce a bad vicious circle, resulting in unstable quality of electrolysis products , and will cause premature deterioration of electrode components due to increased power.

Contents of the invention

Since the above-mentioned temperature control problem still needs to be solved, the inventor provides an electrolysis device for efficiently producing chlorine dioxide based on years of experience in electrolysis practice.

In order to solve the problems of the technologies described above, the electrolysis device for efficiently producing chlorine dioxide of the present invention comprises:

an electrolytic cell for the production of chlorine dioxide; and,

A product storage tank for receiving the chlorine dioxide; and, a temperature control system, which includes a coolant supply unit for providing a coolant, and a directional valve, and are respectively arranged in the electrolytic cell and the finished product The cooling tank on the outer periphery of the storage tank, each of which is provided with a spiral circulation channel around the outer periphery of the electrolytic tank and the finished product storage tank, under the reversing direction of the directional valve, the coolant can be controlled and circulated separately The spiral circulation channel of the finished product storage tank or the spiral circulation channel of the finished product storage tank and the electrolytic cell in sequence.

In an embodiment of the present invention, wherein, the spiral circulation channel is partitioned and formed by a spiral surrounding member respectively surrounding the outer periphery of the electrolytic tank and the finished product storage tank.

In an embodiment of the present invention, the directional valve adopts a two-position three-port type.

In one embodiment of the present invention, wherein the directional valve is actuated by electromagnetic or motor.

In one embodiment of the present invention, the coolant flows through the cooling tank of the finished product storage tank first, and then flows through the cooling tank of the electrolytic tank.

In an embodiment of the present invention, the cooling tank configured with the finished product storage tank is provided with an adjustable temperature sensor, and its temperature is set at an upper limit of 10°C and a lower limit of 5°C.

In one embodiment of the present invention, the cooling tank configured with the electrolytic tank is provided with an adjustable temperature sensor, the upper limit of which is 65°C and the lower limit is 35°C.

In order to achieve substantial and thorough heat exchange, the coolant storage spaces of the present invention are each provided with a spiral circulation channel surrounding the outer periphery of the electrolytic tank and the finished product storage tank, and the coolant flowing into it can spirally surround the electrolytic tank accordingly And the way around the finished product storage tank, make a circulation flow from bottom to top to achieve the expected cooling effect. The directional valve can be controlled to change the direction of the flow path between a first position and a second position. Under the reversing direction of the directional valve, the coolant can be controlled to flow through the cooling tank of the product storage tank alone or simultaneously. The finished product storage tank and the cooling tank of the electrolytic tank; by means of the circulating flow, the electrolytic tank and the finished product storage tank can thus obtain substantially comprehensive heat exchange, and can be reliably maintained at a predetermined temperature control state, so that The electrolysis device can efficiently produce chlorine dioxide.

Description of drawings

Fig. 1 is a schematic configuration diagram of a first preferred embodiment of the electrolysis device of the present invention.

FIG. 2 is a schematic diagram of the operation of the electrolysis device in FIG. 1 , which shows that the coolant circulates through the finished product storage tank separately.

FIG. 3 is another schematic diagram of the operation of the electrolysis device in FIG. 1 , which shows that the coolant circulates through the finished product storage tank and the electrolysis tank simultaneously.

Fig. 4 is a schematic configuration diagram of a second preferred embodiment of the electrolysis device of the present invention.

FIG. 5 is a schematic diagram of the operation of the electrolysis device in FIG. 4 .

FIG. 6 is another schematic diagram of the operation of the electrolysis device in FIG. 4 .

Fig. 7 is a schematic configuration diagram of an electrolytic cell of the prior art.

reference sign

10, 10A, 10B---Electrolyzer

11---The main body of the electrolyzer

12---Chlorine dioxide release outlet

13---Chlorine dioxide output pipe

15---anode

16---cathode

18---Electrolyte input port

19a, 19b---coolant inlet valve

20, 20A, 20B---cooling tank

21---cooling tank

22a---Coolant inlet

22b---Coolant outlet

23---Spiral surrounding parts

24---Spiral circulation channel

25---Adjustable temperature sensor

26---coolant storage space

30, 30A, 30B, 30C --- finished product storage tank

31---Storage tank main body

33---air pump

40, 40A, 40B, 40C---cooling tank

41---cooling tank

42a---Coolant inlet

42b---Coolant outlet

43---Spiral surrounding parts

44---Spiral circulation channel

45---Adjustable temperature sensor

46---coolant storage space

47---direction valve

49a, 49b, 49c---coolant inlet valve

50---Electrical control unit

60---Electrolyte supply unit

63---Electrolyte supply pump

70---coolant supply unit

71---Cooler

72a---exit

72b---Return port

73---coolant supply pump

74---Coolant storage tank.

Detailed ways

Embodiments of the present invention will be described in detail below based on the drawings, and the same symbols in the drawings represent the same or equivalent components.

Please refer to Fig. 1, Fig. 2 and Fig. 3 at the same time, these three figures show the first preferred embodiment of the present invention. The present invention provides an electrolytic device for efficiently producing chlorine dioxide, which includes: an electrolytic cell 10 for producing chlorine dioxide (ClO ₂ ); and an electric control unit 50, which can provide a positive charge and a negative charge With the anode 15 and the negative electrode 16 that are used to supply electricity to electrolyzer 10; And a finished product storage tank 30, its interior has stored an amount of pure water in advance, and is provided with a gas-liquid mixing mechanism (not shown) and an air pump 33, The air pump 33 is sequentially connected to the chlorine dioxide output pipe 13 and the release port 12 of the electrolytic cell 10, so that the chlorine dioxide gas produced by the electrolytic cell 10 can be sucked in, and the gas-liquid mixing mechanism (not shown) will The chlorine dioxide gas is mixed with the pure water to form the chlorine dioxide solution; Slots 20, 40.

Generally, the electrolytic cell can be roughly divided into a box-shaped cell with a rectangular geometric cross-section in the axial direction, and a circular cell with a circular geometric cross-sectional shape in the axial direction. The electrolytic cell 10 in this case is designed as a circular cell. There are many advantages in adopting the circular tank design, for example, a cylindrical electrolytic separation membrane and a cylindrical mesh or plate-shaped electrode member (not shown) can be arranged in it. With the mechanical advantages of a circular geometric section, it can provide Better mechanical strength to reduce the body thickness of the separation membrane and electrode components, in addition to saving costs, simplifying the structure (without rigid reinforcements), and can further reduce the impedance of the electrolysis current and electrolyte flow and reduce the volume of the electrolytic foam ; Another example, the main body of the cylindrical anode and cathode can be arranged concentrically and equidistantly in the electrolytic cell for uniform electrical operation without dead angle, which can not only improve the electrolysis efficiency, but also prevent local electrolytic calcification caused by power supply dead angle Fouling.

The electrolytic cell 10 and the finished product storage tank 30 all have an electrolytic cell main body 11 and a storage tank main body 31 with a circular geometric section in the axial direction. Cooling tanks 21, 41. A coolant storage space 26, 46 is separated between the cooling tank bodies 21, 41, the electrolytic tank main body 11 and the storage tank main body 31 respectively, and the coolant storage space 26, 46 is usually filled with coolant. Coolant inlets 22a, 42a and outlets 22b, 42b are provided on the lower right side and upper left side of the cooling tanks 21, 41, respectively, for coolant to flow into them for heat exchange. In addition, each of the coolant inlets 22a, 42a is provided with an inlet check valve (not shown) to prevent the coolant flowing into the internal storage from flowing backwards.

In order to achieve substantially complete heat exchange, the coolant storage spaces 26, 46 inside the cooling tanks 20, 40 are respectively provided with spiral circulation channels 24, 44 surrounding the outer periphery of the electrolytic tank and the finished product storage tank, It is used to provide a spiral circulation flow path, so the coolant flowing into the coolant storage space 26, 46 is actually in a spiral circulation from bottom to top in a way around the electrolytic cell main body 11 and the storage tank main body 31 flow.

These helical circulation passages 24, 44 are in the manner that the helical surrounding parts 23, 43) spirally surround the outer peripheral edge of the electrolytic cell main body 11 and the storage tank main body 31 respectively, and are located axially at the positions corresponding to the coolant inlets 22a, 42a. The position towards the coolant outlet 22b, 42b is shaped around the partition.

The cooling tanks 20, 40 are respectively equipped with adjustable temperature sensors 25, 45, and when the temperatures measured by the adjustable temperature sensors 25, 45 respectively reach a preset value, a message will be provided to the electronic control unit 50, so that the coolant supply pump 73 pumps the coolant to cool down. Since the electrolysis operation temperature for producing chlorine dioxide is between 45°C and 65°C, the temperature setting limit of the adjustable temperature sensor 25 attached to the electrolytic cell 10 is 65°C and the lower limit is 35°C. Since the boiling point of chlorine dioxide is only 11°C, the temperature setting limit of the adjustable temperature sensor 45 attached to the finished product storage tank 30 is 10°C and the lower limit is 5°C.

The coolant supply unit 70 includes a coolant storage tank 74 for storing coolant, a cooler 71 for cooling down, and a coolant supply pump 73 for pumping the coolant out. In order to meet the cooling temperature control conditions of the finished product storage tank 30 at any time, the temperature of the coolant stored in the coolant storage tank 74 is controlled between 3°C and 9°C by the cooling machine 71 .

During the electrolysis operation, the temperature of the electrolytic cell 10 and the finished product storage tank 30 will sometimes rise at the same time. In order to solve this problem, a better countermeasure is to use the concept of series connection and use the temperature control value of the finished product storage tank 30 to be lower than that of the electrolytic cell 10. value difference, the coolant can first flow through the finished product storage tank 30 and then flow to the electrolytic tank 10 to cool down; a better countermeasure is to set up A directional valve 47 capable of changing the flow direction, the directional valve 47 is preferably actuated by electromagnetic or motor to facilitate automatic control by the electronic control unit 50 . The directional valve 47 preferably adopts a two-position three-port type, which is easily commercially available. Three ports of the directional valve 47 are respectively connected to the coolant return port 72b of the coolant storage tank 74, the coolant outlet 42b of the cooling tank 40, and the coolant inlet 22a of the cooling tank 20; the two positions of the directional valve 47 represent a first A position and a second position. The directional valve 47 is normally in the first position, which can be automatically controlled by the electronic control unit 50 to switch to the second position; in the first position, its internal flow path is only for the coolant to flow through the finished product alone. The cooling tank 40 of the storage tank 30 (as shown in Figure 2); when in the second position, its internal flow path can be used for coolant to flow through the cooling tank 40 of the finished product storage tank 30 before flowing through the electrolytic cell 10 Cooling tank 20 (as shown in Figure 3).

Next, the operation of the present invention is described. First, pure water is injected into the finished product storage tank 30 from the water inlet (not shown in the figure). value then sends a signal to the electronic control unit 50, so that the coolant supply pump 73 pumps the coolant to cool down, and the coolant flowing into the cooling tank 40 does a spiral circular flow in the direction indicated by the arrow to cool down in a comprehensive manner (such as 2), until the high temperature message of the adjustable temperature sensor 45 is eliminated, it stops, so far the cooling and constant temperature standby operation of the product storage tank 30 is completed. The next step is to start the electrolysis operation with the conventional procedure (not repeating it here). During the electrolysis operation, the chlorine dioxide gas produced successively will be pumped to the inside of the finished product storage tank 30 by the air pump 33 through the chlorine dioxide release outlet 12 along the chlorine dioxide output pipe 13, and then passed through the gas-liquid mixing mechanism (not shown in the figure) ), and mixed with pure water to form a chlorine dioxide solution; during the electrolytic cell 30 gas production and air pump 33 pumping operation process, if the electronic control unit 50 receives the temperature rise message from the adjustable temperature sensor 45 again , the above-mentioned actions will be repeated, and the coolant supply pump 73 will pump the coolant to cool down again.

Since the temperature of the electrolytic tank 10 will continue to rise during the electrolysis operation, if the electronic control unit 50 receives the temperature rise message from the adjustable temperature sensor 25, the directional valve 47 will be switched to the second position, and the coolant supply pump will be switched to the second position. 73 operation; the pumped coolant first flows through the cooling tank 40, and then flows to the direction valve 47 through the coolant outlet 42b of the cooling tank 40 along the direction indicated by the arrow, because the direction valve 47 has been switched to the second position , so the coolant will sequentially pass through the directional valve 47, the coolant inlet 22a of the cooling tank 20, and then flow into the inside of the cooling tank 20 to lower the temperature of the electrolytic tank 10 (as shown in Figure 3), until the temperature of the adjustable temperature sensor 25 When the up message is removed, the electronic control unit 50 stops the coolant supply pump 73 from pumping.

Please refer to Fig. 4, Fig. 5 and Fig. 6 at the same time, these three figures show the second preferred embodiment of the present invention. Since the electrolysis process is carried out in stages, the first stage is the feeding stage of sending the electrolyte into the electrolytic cell and pure water into the finished product storage tank; the second stage is the waiting stage during the electrolysis operation; the third stage In order to discharge the electrolytic residue, clean the electrolytic cell, and release the chlorine dioxide solution, the finishing stage; analyzing these three stages, the most time-consuming electrolysis operation stage takes about 90 minutes, and the formation of each production process will be There is a "wait time" of 90 minutes. Therefore, this example adopts the arrangement of three finished product storage tanks 30A, 30B, 30C and two electrolytic tanks 10A, 10B to further illustrate the advantages of the present invention.

Using the electrolysis operation in this example, the finished product storage tank numbered 30A can be combined with the electrolytic tank numbered 10A for the first round of phased operations at the start of work every day; The finished product storage tank with number 10B is used for the second round of phased operation; when the electrolysis tank 10B is performing electrolysis, pure water can be sent into the finished product storage tank with number 30C in advance to prepare for the third round of operation ; When the finished product storage tank numbered 30C is filled with pure water, the first round of electrolysis operation will also be completed, so that the next round of phased operation can be carried out, and so on, the whole operation process will be carried out rationally, and There is no "waiting time" for electrolysis as described above.

Since this example adopts the arrangement of three finished product storage tanks with two electrolytic cells, coolant inlet valves 19a, 19b, 49a, 49b, 49c are respectively provided at the upstream of the coolant inlets of each tank for use To separate the communication between the coolant inlets. The coolant inlet valves 19 a , 19 b , 49 a , 49 b , 49 c are normally closed, and can be controlled by the electronic control unit 50 to respectively open the flow paths.

Next, the operation of the second embodiment will be described. Please refer to FIG. 5 . This figure demonstrates that the electrolytic cell 10A is at the upper limit of temperature rise. At this time, the adjustable temperature sensor 25 immediately sends a signal to the electronic control unit 50 (the electronic control unit is not shown in this figure) to make the coolant inlet valve 19a open the flow path, and make the directional valve 47 switch to the second position, and at the same time , the electronic control unit 50 will automatically compare the temperature values measured by the adjustable temperature sensor 45 according to the configuration of the three cooling tanks (40A, 40B, 40C) at that time, and then open the coolant inlet valve of the cooling tank with a higher temperature (shown as the coolant inlet valve of number 49a according to the arrow in this figure), so that the coolant can flow to the target along the direction guided by the arrow and give timely cooling and cooling.

Fig. 6 shows another exemplary operation of the second embodiment. According to the display in the figure, the coolant is flowing into the cooling tank of the number 40B and the cooling tank of the number 20B to cool down in order, so it can be determined that the directional valve 47 is is controlled to switch to the second position, and the two coolant inlet valves 19b, 49b are opened to flow, so that the coolant can flow to the target along the direction guided by the arrow.

Progress, advantages, benefits, and industrial value of the present invention: according to the present invention, because the coolant flowing into the cooling tank 20, 40 inside can be spiraled from bottom to top at the periphery of the electrolytic cell 10 and the finished product storage tank 30 circular circulation flow for thorough heat exchange; and due to the reversing flow of the directional valve 47, the coolant can be controlled to flow through the cooling tank 40 of the finished product storage tank 30 alone or through the finished product storage tank 30 and the electrolytic tank 10 at the same time The cooling tank 40,20 of this unique comprehensive circulation, the electrolytic tank 10 and the finished product storage tank 30 can be kept in the best temperature control state; in this good temperature control environment, the electrolytic tank 10 It can stably produce high-quality chlorine dioxide gas under the preset power parameters. After the chlorine dioxide gas enters the finished product storage tank 30 and mixes it into a chlorine dioxide solution, its concentration can quickly accumulate to Target value, so that the operation of the electrolytic cell 10 can be carried out under the preset time parameters and completed on time or in advance; under the virtuous cycle in which the finished product storage tank 30 and the electrolytic cell 10 complement each other, it can not only slow down the qualitative change of the electrolytic cell 10 components, The electrolytic cell 10 is durable, and can obtain higher output and purity than the prior art.

In addition, the cooling device of the electrolytic cell of the prior art must continuously pump cooling water for a long time (as shown in Figure 7), in the present invention, the coolant supply pump 73 is usually stationary, and only pumps when cooling is required. The coolant goes to cool down, so electricity bills can be drastically reduced.

The present invention has been described above in conjunction with the drawings. Those who understand this technology can still make various changes, transformations or equivalent applications according to the principles of the present invention, but all changes, transformations or applications are all within the scope of the present invention. within the scope defined by the scope of the patent application.

Claims (7)

1. An electrolysis device for efficiently producing chlorine dioxide, characterized in that it comprises: an electrolytic cell for the production of chlorine dioxide; and, A product storage tank for receiving the chlorine dioxide; and, a temperature control system, which includes a coolant supply unit for providing a coolant, and a directional valve, and are respectively arranged in the electrolytic cell and the finished product The cooling tank on the outer periphery of the storage tank, each of which is provided with a spiral circulation channel around the outer periphery of the electrolytic tank and the finished product storage tank, under the reversing direction of the directional valve, the coolant is controlled to flow through the The spiral circulation channel of the finished product storage tank or the spiral circulation channel of the finished product storage tank and the electrolytic cell in sequence. 2. The electrolytic device for efficiently producing chlorine dioxide as claimed in claim 1, wherein, the spiral circulation channel is separated by a spiral surrounding member in a manner that surrounds the electrolytic cell and the outer periphery of the finished product storage tank respectively take shape. 3. The electrolysis device for efficiently producing chlorine dioxide according to claim 1, wherein, the directional valve adopts a two-position three-port type. 4 . The electrolysis device for efficiently producing chlorine dioxide according to claim 1 , wherein the directional valve is actuated by electromagnetic or motor. 5 . The electrolysis device for efficient production of chlorine dioxide as claimed in claim 1 , wherein the coolant flows through the cooling tank of the finished product storage tank first, and then flows through the cooling tank of the electrolytic tank. 6 . 6. The electrolysis device for efficiently producing chlorine dioxide as claimed in claim 1, wherein, the cooling tank configured with the finished product storage tank is provided with an adjustable temperature sensor, and its temperature is set at an upper limit of 10°C and a lower limit of 5°C. ℃. 7. The electrolytic device for efficiently producing chlorine dioxide as claimed in claim 1, wherein, the cooling tank configured with the electrolytic cell is provided with an adjustable temperature sensor, and its temperature is set at an upper limit of 65° C. and a lower limit of 35° C. .