Ion exchange membrane electrolysis device with adjustable electrolyte flow

Abstract

The application provides an ion exchange membrane electrolysis device with adjustable electrolyte flow, and relates to the technical field of chemical industry. The ion exchange membrane electrolysis device with adjustable electrolyte flow comprises a bottom plate, electrolysis mechanisms, heat equalizing mechanisms, preheating mechanisms and pre-feeding mechanisms which are sequentially arranged from back to front at the top end of the bottom plate, the electrolysis mechanisms comprise electrolytic tanks, three anode chambers and three cathode chambers are arranged between the electrolytic tanks and top covers, cation exchange membranes are arranged between adjacent anode chambers and cathode chambers, the electrolytic tanks are fixedly connected to the inner bottom end of a water bath box, the heat equalizing mechanisms comprise heat equalizing cylinders, spiral pipes A and B are fixedly connected to the inner side of the middle part of the heat equalizing cylinders, a gas return pipe is communicated with the rear part of the heat equalizing cylinders, and electric heating plates B and C are staggered with each other. In the process of adjusting the pH value and salinity, the temperature in the electrolytic tank is moderate, the temperature distribution is good in uniformity, and the ion exchange membrane is fully protected.

Description

TECHNICAL FIELD

[0001] The application relates to the chemical technology field, in particular to an ion membrane electrolysis device with adjustable electrolyte flow. BACKGROUND

[0002] Electrolysis is an electrochemical processing technology, which is widely used in chlor-alkali industry, electroplating, copper refining and other technical fields. Ion membranes are divided into cation exchange membranes, anion exchange membranes and proton exchange membranes. Cation exchange membranes are mainly used in chlor-alkali industry and can effectively inhibit the mixing of electrolysis products.

[0003] The existing ion membrane electrolysis device has poor ability to remove water scale, and the cation exchange membrane is easily affected by water scale, resulting in deterioration and metamorphic phenomenon. Under high-alkali, high-salt and low-temperature conditions, the water content of the cation exchange membrane is insufficient, the performance is reduced, and the side reaction is intensified. Under low-alkali and low-salt conditions, the water content of the cation exchange membrane is too high, which can easily cause membrane swelling, reduce the current efficiency, and the temperature control ability of the existing electrolysis device is difficult to be fully guaranteed during the adjustment of the acid-base value and the salinity, resulting in an increase in power consumption, insufficient comprehensive protection ability of the ion membrane, and limited service life of the ion membrane. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the deficiencies of the prior art, the application provides an ion membrane electrolysis device with adjustable electrolyte flow, which solves the problem that the electrolysis device is difficult to provide sufficient protection for the ion membrane without reducing the electrolysis efficiency.

[0006] (II) Technical solutions

[0007] To achieve the above purposes, the application is implemented by the following technical solutions: an ion membrane electrolysis device with adjustable electrolyte flow, comprising a bottom plate, the bottom plate is provided with an electrolysis mechanism, a heat equalizing mechanism, a preheating mechanism and a pre-feeding mechanism from back to front at the top end, a controller is arranged on one side of the pre-feeding mechanism, the pre-feeding mechanism and the preheating mechanism are communicated, and the preheating mechanism and the electrolysis mechanism are communicated with the heat equalizing mechanism.

[0008] The electrolysis mechanism comprises an electrolytic cell, the top end of the electrolytic cell is fixedly connected with a top cover, the left end of the top cover is provided with a salinity meter, the right end of the top cover is provided with a pH meter, the top end of the top cover is provided with a temperature sensor A, three anode chambers and three cathode chambers are arranged between the electrolytic cell and the top cover, the anode chambers and the cathode chambers are staggered with each other, a cation exchange membrane is arranged between adjacent anode chambers and cathode chambers, an electrode plate A is fixedly connected in the first anode chamber from left to right inside the electrolytic cell, an electrode mesh A is fixedly connected in the second and third anode chambers from left to right inside the electrolytic cell, an electrode plate B is fixedly connected in the third cathode chamber from left to right inside the electrolytic cell, an electrode mesh B is fixedly connected in the first and second cathode chambers from left to right inside the electrolytic cell, electric heating plates A are arranged on the left and right sides of the electrolytic cell, and the electrolytic cell is fixedly connected to the inside bottom end of the water bath box.

[0009] The heat equalizing mechanism comprises a heat equalizing cylinder, an axial flow fan is fixedly connected to the front inner side of the heat equalizing cylinder, a spiral pipe A and a spiral pipe B are fixedly connected to the inner side of the middle part of the heat equalizing cylinder, the spiral pipe A and the spiral pipe B are wound with each other, the front end of the spiral pipe A is communicated with an inflow pipe A, the front end of the spiral pipe B is communicated with an inflow pipe B, the rear end of the spiral pipe A is communicated with a flow guide pipe A, the rear end of the spiral pipe B is communicated with a flow guide pipe B, the rear end of the flow guide pipe A is communicated with a flow distribution pipe A, the rear end of the flow guide pipe B is communicated with a flow distribution pipe B, and the rear part of the heat equalizing cylinder is communicated with a gas return pipe.

[0010] The preheating mechanism comprises a preheating box, descaling boxes are fixedly connected to the left and right sides in the preheating box, three electric heating plates B are fixedly connected to the inner side top end of the descaling box from back to front, two electric heating plates C are fixedly connected to the inner side bottom end of the descaling box from back to front, and the electric heating plates B and the electric heating plates C are staggered with each other.

[0011] The preheating mechanism comprises a preheating box, descaling boxes are fixedly connected to the left and right sides in the preheating box, three electric heating plates B are fixedly connected to the inner side top end of the descaling box from back to front, two electric heating plates C are fixedly connected to the inner side bottom end of the descaling box from back to front, and the electric heating plates B and the electric heating plates C are staggered with each other.

[0012] Preferably, the descaling box on the right side of the preheating box is communicated with the inflow pipe A, the descaling box on the left side of the preheating box is communicated with the inflow pipe B, a flow control plate is fixedly connected between the top end of the descaling box on the left side of the preheating box and the top end of the descaling box on the right side of the preheating box, the flow control plate is fixedly connected between the front side wall and the rear side wall of the preheating box, the front end of the heat equalizing cylinder is communicated with the middle part of the preheating box, and the front end of the gas return pipe is communicated with the top of the preheating box.

[0013] Preferably, the detection end of the salinometer is arranged at the inner left end of the electrolytic cell, the detection end of the pH meter is arranged at the inner right end of the electrolytic cell, the detection end of the temperature sensor A is arranged inside the electrolytic cell, the cation exchange membrane is fixedly connected between the electrolytic cell and the top cover, the electric heating plate A is fixedly connected to the inner bottom end of the electrolytic cell, the top cover penetrates the water bath box, six exhaust pipes are uniformly fixed to the top of the top cover, six liquid discharge pipes are uniformly fixed to the bottom rear side of the top cover, the six exhaust pipes on the top of the top cover are in communication with the three anode chambers and the three cathode chambers respectively, the six liquid discharge pipes on the bottom of the top cover are in communication with the three anode chambers and the three cathode chambers respectively, the shunt pipe A is in communication with the three anode chambers, the shunt pipe B is in communication with the three cathode chambers, the water outlet of the corrosion-resistant pump A is in communication with the front top side of the descaling box on the right side of the preheating box, and the water outlet of the corrosion-resistant pump B is in communication with the front top side of the descaling box on the left side of the preheating box.

[0014] Preferably, the electrode plate A is connected in parallel with the two electrode nets A through wires, the electrode plate A and the two electrode nets A are both anodes, the electrode plate B is connected in parallel with the two electrode nets B through wires, and the electrode plate B and the two electrode nets B are both cathodes.

[0015] Preferably, the electrolytic cell, the spiral pipe A and the spiral pipe B are made of heat-conducting materials, and the top cover, the water bath box, the heat-distribution cylinder, the inflow pipe A, the inflow pipe B, the flow guide pipe A, the flow guide pipe B, the gas return pipe and the preheating box are made of heat-insulating materials.

[0016] Preferably, the water bath box, the heat-distribution cylinder, the preheating box, the corrosion-resistant pump A, the corrosion-resistant pump B, the salt tank and the alkali tank are fixedly connected to the top end of the bottom plate.

[0017] Preferably, the controller is electrically connected with the salinometer, the pH meter, the temperature sensor A, the electrode plate A, the electrode plate B, the electric heating plate A, the axial flow fan, the electric heating plate B, the electric heating plate C, the temperature sensor B, the corrosion-resistant pump A and the corrosion-resistant pump B.

[0018] Preferably, a working method of an ion membrane electrolysis device with adjustable electrolyte flow comprises the following steps:

[0019] S1. Preheating and descaling

[0020] The saturated sodium chloride solution and the low-concentration sodium hydroxide solution in the salt tank and the alkali tank are pumped into the two descaling boxes in the preheating box by the corrosion-resistant pump A and the corrosion-resistant pump B, the saturated sodium chloride solution and the low-concentration sodium hydroxide solution are preheated by the interlaced electric heating plate B and the electric heating plate C, and the water scale in the saturated sodium chloride solution and the low-concentration sodium hydroxide solution is precipitated and intercepted.

[0021] S2. Salt and alkali heat distribution

[0022] The solutions in the two descaling boxes enter the spiral pipes A and B through the inlet pipes A and B respectively, and the hot air in the preheating box and the homogenizing cylinder reciprocally flows through the axial flow fan and the return air pipe, and the hot air and the solutions in the spiral pipes A and B are in countercurrent, so that the temperatures of the solutions in the spiral pipes A and B are equalized.

[0023] S3. Electrolysis operation

[0024] The solutions in the spiral pipes A and B flow into the three anode chambers and the three cathode chambers through the flow guide pipes A and B and the flow distribution pipes A and B, so that the electrolytic tank is filled with electrolyte, and the electrolyte is ionized through the electrode plates A and B and the electrode nets A and B, the generated chlorine gas is discharged through the exhaust pipes connected with the anode chambers, the generated hydrogen gas is discharged through the exhaust pipes connected with the cathode chambers, the low-concentration sodium chloride solution is discharged through the liquid discharge pipes connected with the anode chambers, and the high-concentration sodium hydroxide solution is discharged through the liquid discharge pipes connected with the cathode chambers.

[0025] S4. Working condition adjustment

[0026] During the electrolysis process, the salinity meter detects the salinity in the electrolytic tank, and when the salinity is lower than 98% of the salinity set value or higher than 102% of the salinity set value, the controller adjusts the power of the corrosion-resistant pump A to restore the salinity in the electrolytic tank to the salinity set value; the pH meter detects the acid-base degree in the electrolytic tank, and when the acid-base degree is lower than 98% of the acid-base degree set value or higher than 102% of the acid-base degree set value, the controller adjusts the power of the corrosion-resistant pump B to restore the acid-base degree in the electrolytic tank to the alkalinity set value; the temperature sensor A detects the temperature in the electrolytic tank, and when the temperature is lower than 98% of the electrolytic tank temperature set value or higher than 102% of the electrolytic tank temperature set value, the controller adjusts the power of the electric heating plate A to restore the temperature in the electrolytic tank to the electrolytic tank temperature set value; and the temperature sensor B detects the temperature in the descaling box, and when the temperature is lower than 98% of the descaling box temperature set value or higher than 102% of the descaling box temperature set value, the controller adjusts the power of the electric heating plates B and C to restore the temperature in the descaling box to the descaling box temperature set value.

[0027] (Three) beneficial effects

[0028] The present application provides an ion membrane electrolysis device with adjustable electrolyte flow. The following beneficial effects are achieved:

[0029] 1. This invention preheats saturated sodium chloride solution and low-concentration sodium hydroxide solution using interlaced heating plates B and C in a descaling tank, simultaneously causing scale to precipitate and be intercepted. A salinity meter, pH meter, and controller monitor the salinity and pH levels in the electrolytic cell. A pre-feeding mechanism regulates the flow rate of the electrolyte in the electrolytic cell, maintaining salinity and pH at set values. Temperature sensors A and B, along with a controller, heating plate A, water bath, heating plates B and C, regulate the temperature in the electrolytic cell and preheating tank. An axial flow fan and a return air pipe ensure reciprocating circulation of hot air between the heat exchanger and the preheating tank. This hot air convects with the solution in spiral tubes A and B, ensuring uniform solution temperature within the interlaced spiral tubes. This results in a uniform temperature distribution within the electrolytic cell, providing adequate protection for the cation exchange membrane while maintaining electrolysis efficiency.

[0030] 2. The heat emitted by spiral tubes A and B in this invention heats the air inside the heat exchanger. The hot air inside the heat exchanger is transferred to the preheating box by an axial flow fan. Under the action of the flow control plate, the hot air flows from below the flow control plate around the descaling box to above the flow control plate, and then flows back to the inside of the heat exchanger along the return air pipe. While balancing the solution temperature in spiral tubes A and B, the residual heat in the heat exchanger is used to keep the preheating box warm, reducing energy consumption. Attached Figure Description

[0031] Figure 1 This is a perspective view of the present invention;

[0032] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the internal structure of the electrolysis mechanism of the present invention;

[0034] Figure 4 This is a front view structural diagram of the electrolysis mechanism of the present invention;

[0035] Figure 5 This is a schematic diagram of the internal structure of the heat dissipation mechanism of the present invention;

[0036] Figure 6 This is a schematic diagram of the internal structure of the preheating mechanism of the present invention;

[0037] Figure 7 This is a side view of the descaling tank of the present invention;

[0038] Figure 8 This is a perspective view of the pre-feeding mechanism of the present invention.

[0039] The components include: 1. Base plate; 2. Electrolysis mechanism; 3. Heat equalization mechanism; 4. Preheating mechanism; 5. Pre-feeding mechanism; 6. Controller; 201. Electrolytic cell; 202. Top cover; 203. Salinity meter; 204. pH meter; 205. Temperature sensor A; 206. Anode chamber; 207. Cathode chamber; 208. Cation exchange membrane; 209. Electrode plate A; 210. Electrode mesh A; 211. Electrode plate B; 212. Electrode mesh B; 213. Heating plate A; 214. Water bath; 215. Exhaust pipe; 216. Drain pipe; 3 01. Heat spreader; 302. Axial flow fan; 303. Spiral tube A; 304. Spiral tube B; 305. Inlet pipe A; 306. Inlet pipe B; 307. Guide pipe A; 308. Guide pipe B; 309. Diverter pipe A; 310. Diverter pipe B; 311. Return air pipe; 401. Preheating box; 402. Descaling box; 403. Heating plate B; 404. Heating plate C; 405. Temperature sensor B; 406. Flow control plate; 501. Corrosion-resistant pump A; 502. Corrosion-resistant pump B; 503. Salt tank; 504. Alkali tank. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example:

[0042] like Figures 1-8 As shown, this embodiment of the invention provides an ion membrane electrolysis device with adjustable electrolyte flow rate, including a base plate 1. The top of the base plate 1 is provided with an electrolysis mechanism 2, a homogenizing mechanism 3, a preheating mechanism 4 and a prefeeding mechanism 5 arranged sequentially from back to front. A controller 6 is provided on one side of the prefeeding mechanism 5. The prefeeding mechanism 5 is connected to the preheating mechanism 4. The preheating mechanism 4 and the electrolysis mechanism 2 are both connected to the homogenizing mechanism 3.

[0043] The electrolysis mechanism 2 comprises an electrolytic tank 201, the top end of the electrolytic tank 201 is fixedly connected with a top cover 202, the left end of the top cover 202 is provided with a salinity meter 203, the right end of the top cover 202 is provided with a pH meter 204, the top end of the top cover 202 is provided with a temperature sensor A 205, three anode chambers 206 and three cathode chambers 207 are arranged between the electrolytic tank 201 and the top cover 202, the anode chambers 206 and the cathode chambers 207 are staggered with each other, a cation exchange membrane 208 is arranged between adjacent anode chambers 206 and cathode chambers 207, an electrode plate A 209 is fixedly connected inside the first anode chamber 206 from left to right inside the electrolytic tank 201, an electrode mesh A 210 is fixedly connected inside the second and third anode chambers 206 from left to right inside the electrolytic tank 201, an electrode plate B 211 is fixedly connected inside the third cathode chamber 207 from left to right inside the electrolytic tank 201, an electrode mesh B 212 is fixedly connected inside the first and second cathode chambers 207 from left to right inside the electrolytic tank 201, an electric heating plate A 213 is arranged on the left and right sides of the electrolytic tank 201, and the electrolytic tank 201 is fixedly connected to the inside bottom end of a water bath box 214;

[0044] The heat equalizing mechanism 3 comprises a heat equalizing cylinder 301, an axial flow fan 302 is fixedly connected to the inner side of the front part of the heat equalizing cylinder 301, a spiral pipe A 303 and a spiral pipe B 304 are fixedly connected to the inner side of the middle part of the heat equalizing cylinder 301, the spiral pipe A 303 and the spiral pipe B 304 are wound around each other, the spiral pipe A 303 is communicated with an inflow pipe A 305 at the front end, the spiral pipe B 304 is communicated with an inflow pipe B 306 at the front end, the spiral pipe A 303 is communicated with a flow guide pipe A 307 at the rear end, the spiral pipe B 304 is communicated with a flow guide pipe B 308 at the rear end, the flow guide pipe A 307 is communicated with a flow dividing pipe A 309 at the rear end, the flow guide pipe B 308 is communicated with a flow dividing pipe B 310 at the rear end, and the heat equalizing cylinder 301 is communicated with a gas return pipe 311 at the rear part;

[0045] The preheating mechanism 4 comprises a preheating box 401, descaling boxes 402 are fixedly connected to the left and right sides inside the preheating box 401, three electric heating plates B 403 are fixedly connected to the inner side top end of the descaling box 402 from rear to front in sequence, two electric heating plates C 404 are fixedly connected to the inner side bottom end of the descaling box 402 from rear to front in sequence, the electric heating plates B 403 and the electric heating plates C 404 are staggered with each other, the saturated sodium chloride solution and the low-concentration sodium hydroxide solution are preheated by the staggered electric heating plates B 403 and the electric heating plates C 404 in the descaling box 402, at the same time, the water scale in the solution is precipitated and intercepted, so as to avoid the water scale from blocking the cation exchange membrane 208 in the electrolytic tank 201;

[0046] The pre-feeding mechanism 5 comprises a corrosion-resistant pump A 501 and a corrosion-resistant pump B 502, the water inlet of the corrosion-resistant pump A 501 is communicated with the salt tank 503, the water inlet of the corrosion-resistant pump B 502 is communicated with the alkali tank 504, the salinity and the pH value in the electrolytic tank 201 are detected by the salinity meter 203, the pH meter 204 and the controller 6, and the flow of the electrolyte in the electrolytic tank 201 is adjusted by the pre-feeding mechanism 5, so that the salinity and the pH value are maintained at the set value, the water content of the cation exchange membrane 208 is moderate, the cation exchange membrane 208 is prevented from deteriorating and deteriorating, the service life of the electrolytic device is prolonged, the failure rate of the electrolytic device is reduced, the temperature in the electrolytic tank 201 and the preheating box 401 is adjusted by the temperature sensor A 205, the temperature sensor B 405, the controller 6, the electric heating plate A 213, the water bath box 214, the electric heating plate B 403 and the electric heating plate C 404, the axial flow fan 302 cooperates with the return air pipe 311 to make the heat cylinder 301 and the hot air in the preheating box 401 reciprocating flow, the hot air and the solution in the spiral pipe A 303 and the spiral pipe B 304 are in countercurrent, the temperature of the solution in the spiral pipe A 303 and the spiral pipe B 304 which are intertwined is equal, so that the uniformity of the temperature distribution in the electrolytic tank 201 is good, which can provide sufficient protection for the cation exchange membrane 208 and ensure that the electrolytic efficiency is not affected.

[0047] The descaling box 402 on the right side of the preheating box 401 is communicated with the inlet pipe A 305, the descaling box 402 on the left side of the preheating box 401 is communicated with the inlet pipe B 306, the top ends of the descaling boxes 402 on the left and right sides of the preheating box 401 are fixedly connected, the flow control plate 406 is fixedly connected between the front side wall and the rear side wall of the preheating box 401, the front end of the heat cylinder 301 is communicated with the middle part of the preheating box 401, the front end of the return air pipe 311 is communicated with the top of the preheating box 401, the heat generated by the spiral pipe A 303 and the spiral pipe B 304 heats the air in the heat cylinder 301, the hot air in the heat cylinder 301 is transferred to the preheating box 401 by the axial flow fan 302, under the action of the flow control plate 406, the hot air flows from below the flow control plate 406 to above the flow control plate 406, and then flows back to the inside of the heat cylinder 301 along the return air pipe 311, while balancing the solution temperature in the spiral pipe A 303 and the spiral pipe B 304, the preheating box 401 is also heat-insulated by the waste heat, which saves energy and reduces emissions.

[0048] The detection end of the salinity meter 203 is arranged at the inner left end of the electrolytic cell 201, the detection end of the pH meter 204 is arranged at the inner right end of the electrolytic cell 201, the detection end of the temperature sensor A 205 is arranged in the electrolytic cell 201, the cation exchange membrane 208 is fixedly connected between the electrolytic cell 201 and the top cover 202, the electric heating plate A 213 is fixedly connected to the inner bottom end of the electrolytic cell 201, the top cover 202 penetrates the water bath box 214, six exhaust pipes 215 are uniformly fixedly connected to the top of the top cover 202, six liquid discharge pipes 216 are uniformly fixedly connected to the bottom of the rear side of the top cover 202, the six exhaust pipes 215 on the top of the top cover 202 are respectively communicated with the three anode chambers 206 and the three cathode chambers 207, the six liquid discharge pipes 216 on the bottom of the top cover 202 are respectively communicated with the three anode chambers 206 and the three cathode chambers 207, the shunt pipe A 309 is communicated with the three anode chambers 206, the shunt pipe B 310 is communicated with the three cathode chambers 207, the water outlet of the corrosion-resistant pump A 501 is communicated with the front side top of the descaling box 402 on the right side of the preheating box 401, and the water outlet of the corrosion-resistant pump B 502 is communicated with the front side top of the descaling box 402 on the left side of the preheating box 401.

[0049] The electrode plate A 209 is connected in parallel with the two electrode nets A 210 through wires, the electrode plate A 209 and the two electrode nets A 210 are both anodes, the electrode plate B 211 is connected in parallel with the two electrode nets B 212 through wires, and the electrode plate B 211 and the two electrode nets B 212 are both cathodes.

[0050] The materials of the electrolytic cell 201, the spiral pipe A 303 and the spiral pipe B 304 are all heat-conducting materials, and the materials of the top cover 202, the water bath box 214, the heat uniformizing cylinder 301, the flow inlet pipe A 305, the flow inlet pipe B 306, the flow guide pipe A 307, the flow guide pipe B 308, the gas return pipe 311 and the preheating box 401 are all heat-insulating materials.

[0051] The water bath box 214, the heat uniformizing cylinder 301, the preheating box 401, the corrosion-resistant pump A 501, the corrosion-resistant pump B 502, the salt tank 503 and the alkali tank 504 are all fixedly connected to the top end of the bottom plate 1.

[0052] The controller 6 is electrically connected with the salinity meter 203, the pH meter 204, the temperature sensor A 205, the electrode plate A 209, the electrode plate B 211, the electric heating plate A 213, the axial flow fan 302, the electric heating plate B 403, the electric heating plate C 404, the temperature sensor B 405, the corrosion-resistant pump A 501 and the corrosion-resistant pump B 502.

[0053] A working method of an ion exchange membrane electrolysis device with adjustable electrolyte flow, comprising the following steps:

[0054] S1. Preheating and descaling

[0055] The saturated sodium chloride solution and the low-concentration sodium hydroxide solution in the salt tank 503 and the alkali tank 504 are pumped into the two descaling tanks 402 in the preheating tank 401 by the corrosion-resistant pump A 501 and the corrosion-resistant pump B 502, and the saturated sodium chloride solution and the low-concentration sodium hydroxide solution are preheated by the interlaced electric heating plate B 403 and the electric heating plate C 404, while the water scale in the saturated sodium chloride solution and the low-concentration sodium hydroxide solution is precipitated and intercepted;

[0056] S2. Salt and alkali heating

[0057] The solutions in the two descaling tanks 402 enter the spiral pipes A 303 and B 304 through the inflow pipes A 305 and B 306, respectively, and the hot air in the preheating tank 401 reciprocally flows through the heating cylinder 301 by the axial flow fan 302 cooperating with the return air pipe 311, and the hot air and the solutions in the spiral pipes A 303 and B 304 are in countercurrent flow, so that the temperatures of the solutions in the interwoven spiral pipes A 303 and B 304 are equalized;

[0058] S3. Electrolysis operation

[0059] The solutions in the spiral pipes A 303 and B 304 flow into the three anode chambers 206 and the three cathode chambers 207 through the flow guide pipes A 307 and B 308 and the shunt pipes A 309 and B 310, so that the electrolytic tank 201 is filled with electrolyte, and the electrolyte is ionized by the electrode plates A 209 and B 211 cooperating with the electrode nets A 210 and B 212, the chlorine gas generated by ionization is discharged through the exhaust pipe 215 connected with the anode chamber 206, the hydrogen gas generated by ionization is discharged through the exhaust pipe 215 connected with the cathode chamber 207, the low-concentration sodium chloride solution is discharged through the liquid discharge pipe 216 connected with the anode chamber 206, and the high-concentration sodium hydroxide solution is discharged through the liquid discharge pipe 216 connected with the cathode chamber 207;

[0060] S4. Working condition adjustment

[0061] In the electrolysis process, the salinity meter 203 cooperates with the controller 6 to detect the salinity in the electrolytic tank 201, when the salinity in the electrolytic tank 201 is lower than 98% of the salinity set value or higher than 102% of the salinity set value, the controller 6 adjusts the power of the corrosion-resistant pump A 501 to restore the salinity in the electrolytic tank 201 to the salinity set value, the pH meter 204 cooperates with the controller 6 to detect the pH value in the electrolytic tank 201, when the pH value in the electrolytic tank 201 is lower than 98% of the pH set value or higher than 102% of the pH set value, the controller 6 adjusts the power of the corrosion-resistant pump B 502 to restore the pH value in the electrolytic tank 201 to the pH set value, the temperature sensor A 205 cooperates with the controller 6 to detect the temperature in the electrolytic tank 201, when the temperature in the electrolytic tank 201 is lower than 98% of the electrolytic tank 201 temperature set value or higher than 102% of the electrolytic tank 201 temperature set value, the controller 6 adjusts the power of the electric heating plate A 213 to restore the temperature in the electrolytic tank 201 to the electrolytic tank 201 temperature set value, the temperature sensor B 405 cooperates with the controller 6 to detect the temperature in the descaling box 402, when the temperature in the descaling box 402 is lower than 98% of the descaling box 402 temperature set value or higher than 102% of the descaling box 402 temperature set value, the controller 6 adjusts the power of the electric heating plate B 403 and the electric heating plate C 404 to restore the temperature in the descaling box 402 to the descaling box 402 temperature set value.

[0062] While the embodiments of the application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. An ion-exchange membrane electrolysis device with adjustable electrolyte flow, comprising a base plate (1), characterized in that: The bottom plate (1) top end is sequentially provided with electrolytic mechanism (2), heat equalizing mechanism (3), preheating mechanism (4) and pre-feeding mechanism (5) from back to front, one side of pre-feeding mechanism (5) is provided with controller (6), pre-feeding mechanism (5) is communicated with preheating mechanism (4), preheating mechanism (4) and electrolytic mechanism (2) are all communicated with heat equalizing mechanism (3); The electrolytic mechanism (2) includes electrolytic tank (201), the top end of electrolytic tank (201) is fixedly connected with top cover (202), the left end of top cover (202) is provided with salinity meter (203), the right end of top cover (202) is provided with pH meter (204), the top end of top cover (202) is provided with temperature sensor A (205), three anode chambers (206) and three cathode chambers (207) are arranged between electrolytic tank (201) and top cover (202), the anode chamber (206) and the cathode chamber (207) are staggered with each other, adjacent anode chamber (206) and cathode chamber (207) are provided with cation exchange membrane (208), the inside of electrolytic tank (201) is fixedly connected with electrode plate A (209) from left to right inside the first anode chamber (206), the inside of electrolytic tank (201) is fixedly connected with electrode net A (210) from left to right inside the second and third anode chambers (206), the inside of electrolytic tank (201) is fixedly connected with electrode plate B (211) from left to right inside the third cathode chamber (207), the inside of electrolytic tank (201) is fixedly connected with electrode net B (212) from left to right inside the first and second cathode chambers (207), the left and right sides of electrolytic tank (201) are provided with electric heating plate A (213), electrolytic tank (201) is fixedly connected to the inside bottom end of water bath box (214); The heat equalizing mechanism (3) includes heat equalizing cylinder (301), the front inside of heat equalizing cylinder (301) is fixedly connected with axial flow fan (302), the inside of heat equalizing cylinder (301) is fixedly connected with spiral pipe A (303) and spiral pipe B (304), spiral pipe A (303) and spiral pipe B (304) are wound with each other, the front end of spiral pipe A (303) is communicated with inflow pipe A (305), the front end of spiral pipe B (304) is communicated with inflow pipe B (306), the rear end of spiral pipe A (303) is communicated with flow guide pipe A (307), the rear end of spiral pipe B (304) is communicated with flow guide pipe B (308), the rear end of flow guide pipe A (307) is communicated with shunt pipe A (309), the rear end of flow guide pipe B (308) is communicated with shunt pipe B (310), the rear of heat equalizing cylinder (301) is communicated with return air pipe (311); The preheating mechanism (4) comprises a preheating box (401), both left and right sides of the preheating box (401) are fixedly connected with descaling boxes (402), three electric heating plates B (403) are fixedly connected in sequence from back to front on the inner side top end of the descaling box (402), two electric heating plates C (404) are fixedly connected in sequence from back to front on the inner side bottom end of the descaling box (402), the electric heating plates B (403) and the electric heating plates C (404) are staggered with each other; The pre-feeding mechanism (5) comprises corrosion-resistant pumps A (501) and B (502), the water inlet of the corrosion-resistant pump A (501) is communicated with a salt tank (503), and the water inlet of the corrosion-resistant pump B (502) is communicated with an alkali tank (504). The descaling box (402) on the right side of the preheating box (401) is communicated with an inflow pipe A (305), the descaling box (402) on the left side of the preheating box (401) is communicated with an inflow pipe B (306), a flow control plate (406) is fixedly connected between the top end of the descaling box (402) on the left side of the preheating box (401) and the top end of the descaling box (402) on the right side of the preheating box (401), the flow control plate (406) is fixedly connected between the front side wall and the rear side wall of the preheating box (401), the front end of the heat equalizing cylinder (301) is communicated with the middle part of the preheating box (401), and the front end of the gas return pipe (311) is communicated with the top of the preheating box (401).

2. The ion-exchange membrane electrolysis apparatus with adjustable electrolyte flow according to claim 1, characterized in that: The detection end of the salinometer (203) is arranged on the inner left end of the electrolytic cell (201), the detection end of the pH meter (204) is arranged on the inner right end of the electrolytic cell (201), the detection end of the temperature sensor A (205) is arranged in the electrolytic cell (201), the cation exchange membrane (208) is fixedly connected between the electrolytic cell (201) and the top cover (202), the electric heating plate A (213) is fixedly connected on the inner bottom end of the electrolytic cell (201), the top cover (202) penetrates through the water bath box (214), six exhaust pipes (215) are uniformly fixed on the top of the top cover (202), six liquid discharge pipes (216) are uniformly fixed on the bottom of the rear side of the top cover (202), the six exhaust pipes (215) on the top of the top cover (202) are respectively communicated with the three anode chambers (206) and the three cathode chambers (207), the six liquid discharge pipes (216) on the bottom of the top cover (202) are respectively communicated with the three anode chambers (206) and the three cathode chambers (207), the shunt pipe A (309) is communicated with the three anode chambers (206), the shunt pipe B (310) is communicated with the three cathode chambers (207), the water outlet of the corrosion-resistant pump A (501) is communicated with the front side top of the descaling box (402) on the right side of the preheating box (401), and the water outlet of the corrosion-resistant pump B (502) is communicated with the front side top of the descaling box (402) on the left side of the preheating box (401).

3. The ion-exchange membrane electrolysis apparatus with adjustable electrolyte flow according to claim 1, characterized in that: The electrode plate A (209) is connected in parallel with two electrode nets A (210) through wires, the electrode plate A (209) and the two electrode nets A (210) are both anodes, the electrode plate B (211) is connected in parallel with two electrode nets B (212) through wires, and the electrode plate B (211) and the two electrode nets B (212) are both cathodes.

4. The ion-exchange membrane electrolysis apparatus with adjustable electrolyte flow according to claim 1, characterized in that: The materials of the electrolytic cell (201), the spiral pipe A (303) and the spiral pipe B (304) are heat-conducting materials, and the materials of the top cover (202), the water bath box (214), the heat equalizing cylinder (301), the inflow pipe A (305), the inflow pipe B (306), the flow guide pipe A (307), the flow guide pipe B (308), the return air pipe (311) and the preheating box (401) are heat-insulating materials.

5. The ion-exchange membrane electrolysis apparatus with adjustable electrolyte flow according to claim 1, characterized in that: The water bath box (214), the heat equalizing cylinder (301), the preheating box (401), the corrosion-resistant pump A (501), the corrosion-resistant pump B (502), the salt tank (503) and the alkali tank (504) are fixedly connected to the top end of the bottom plate (1).

6. The ion-exchange membrane electrolysis apparatus with adjustable electrolyte flow according to claim 1, characterized in that: The controller (6) is electrically connected with the salinometer (203), the pH meter (204), the temperature sensor A (205), the electrode plate A (209), the electrode plate B (211), the electric heating plate A (213), the axial flow fan (302), the electric heating plate B (403), the electric heating plate C (404), the temperature sensor B (405), the corrosion-resistant pump A (501) and the corrosion-resistant pump B (502).

7. The method for operating an ion-exchange membrane electrolysis apparatus with adjustable electrolyte flow according to claim 1, characterized in that: The method comprises the following steps: S1. Preheating and descaling The saturated sodium chloride solution and the low-concentration sodium hydroxide solution in the salt tank (503) and the alkali tank (504) are pumped into two descaling boxes (402) in the preheating box (401) by the corrosion-resistant pump A (501) and the corrosion-resistant pump B (502), the saturated sodium chloride solution and the low-concentration sodium hydroxide solution are preheated by the interlaced electric heating plate B (403) and the electric heating plate C (404), and the water scale in the saturated sodium chloride solution and the low-concentration sodium hydroxide solution is precipitated and intercepted; S2. Salt and alkali heat equalization The solutions in the two descaling boxes (402) enter the spiral pipe A (303) and the spiral pipe B (304) through the inflow pipe A (305) and the inflow pipe B (306), the heat equalizing cylinder (301) and the preheating box (401) reciprocally circulate hot air by the axial flow fan (302) and the return air pipe (311), the hot air and the solutions in the spiral pipe A (303) and the spiral pipe B (304) are in countercurrent, and the temperatures of the solutions in the interwoven spiral pipe A (303) and the spiral pipe B (304) are equalized; S3. Electrolysis operation The solutions in the spiral tube A (303) and the spiral tube B (304) flow into the three anode chambers (206) and the three cathode chambers (207) through the flow guide pipe A (307) and the flow guide pipe B (308), and the three anode chambers (206) and the three cathode chambers (207) are filled with the electrolyte, the electrolyte is ionized through the electrode plate A (209) and the electrode plate B (211) cooperating with the electrode net A (210) and the electrode net B (212), the chlorine produced by the ionization is discharged through the exhaust pipe (215) communicating with the anode chamber (206), the hydrogen produced by the ionization is discharged through the exhaust pipe (215) communicating with the cathode chamber (207), the low-concentration sodium chloride solution is discharged through the liquid discharge pipe (216) communicating with the anode chamber (206), and the high-concentration sodium hydroxide solution is discharged through the liquid discharge pipe (216) communicating with the cathode chamber (207); S4. Working condition adjustment In the electrolysis process, the salinity meter (203) detects the salinity in the electrolytic tank (201) in cooperation with the controller (6), and when the salinity in the electrolytic tank (201) is lower than 98% of the salinity set value or higher than 102% of the salinity set value, the controller (6) adjusts the power of the corrosion-resistant pump A (501) to restore the salinity in the electrolytic tank (201) to the salinity set value, the pH meter (204) detects the acid-base degree in the electrolytic tank (201) in cooperation with the controller (6), and when the acid-base degree in the electrolytic tank (201) is lower than 98% of the acid-base degree set value or higher than 102% of the acid-base degree set value, the controller (6) adjusts the power of the corrosion-resistant pump B (502) to restore the acid-base degree in the electrolytic tank (201) to the alkalinity set value, the temperature sensor A (205) detects the temperature in the electrolytic tank (201) in cooperation with the controller (6), and when the temperature in the electrolytic tank (201) is lower than 98% of the temperature set value of the electrolytic tank (201) or higher than 102% of the temperature set value of the electrolytic tank (201), the controller (6) adjusts the power of the electric heating plate A (213) to restore the temperature in the electrolytic tank (201) to the temperature set value of the electrolytic tank (201), and the temperature sensor B (405) detects the temperature in the descaling box (402) in cooperation with the controller (6), and when the temperature in the descaling box (402) is lower than 98% of the temperature set value of the descaling box (402) or higher than 102% of the temperature set value of the descaling box (402), the controller (6) adjusts the power of the electric heating plate B (403) and the electric heating plate C (404) to restore the temperature in the descaling box (402) to the temperature set value of the descaling box (402).

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