CN113201757A - Sodium hypochlorite production equipment with hydrogen discharge device and production method thereof - Google Patents

Sodium hypochlorite production equipment with hydrogen discharge device and production method thereof Download PDF

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Publication number
CN113201757A
CN113201757A CN202110530661.5A CN202110530661A CN113201757A CN 113201757 A CN113201757 A CN 113201757A CN 202110530661 A CN202110530661 A CN 202110530661A CN 113201757 A CN113201757 A CN 113201757A
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pipe
liquid
sodium hypochlorite
pickling
pipeline
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尹宝
尹恺
李凯
韩亦鸿
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Weifang Siyuan Environmental Protection Equipment Co ltd
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Weifang Siyuan Environmental Protection Equipment Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/24—Halogens or compounds thereof
    • C25B1/26—Chlorine; Compounds thereof
    • C25B1/265—Chlorates
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/02—Process control or regulation
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The invention discloses a sodium hypochlorite production device with a hydrogen discharge device and a production method thereof, the sodium hypochlorite production device with the hydrogen discharge device comprises a production host, an electrolytic cell is arranged in the production host, a water softener, a concentrated salt box, a medicine storage box and an acid storage box are arranged at one side of the production host, a mixing pipeline is communicated with a liquid inlet of the electrolytic cell, a liquid outlet of the water softener is communicated with a liquid inlet of the mixing pipeline through a water conveying pipeline, a liquid outlet of the concentrated salt box is communicated with a liquid inlet of the mixing pipeline through a salt distribution pipeline, a liquid outlet of the acid storage box is communicated with a liquid inlet of the mixing pipeline through an acid pickling pipeline, a liquid outlet of the electrolytic cell is communicated with the medicine storage box through a liquid outlet pipeline, a gas-liquid separation device for constantly discharging hydrogen produced during the production of sodium hypochlorite is connected in series with the liquid outlet pipeline, the invention can be used for online proportioning concentrated salt water and softened water to obtain equal proportion dilute salt water, the indexes of the produced sodium hypochlorite liquid medicine are kept uniform, and the production efficiency and the production effect are improved.

Description

Sodium hypochlorite production equipment with hydrogen discharge device and production method thereof
Technical Field
The invention belongs to the technical field of sodium hypochlorite production, and particularly relates to sodium hypochlorite production equipment with a hydrogen discharge device and a production method thereof.
Background
The sodium hypochlorite solution is a non-naturally-occurring strong oxidant, has the same sterilization effect as chlorine gas, and belongs to a real high-efficiency, broad-spectrum and safe powerful sterilization and virus killing agent; and sodium hypochlorite has been widely used for disinfection and epidemic prevention of various water bodies including tap water, industrial circulating water, swimming pool water, hospital sewage, and the like.
Based on the problems, various sodium hypochlorite generators appear on the market, the existing sodium hypochlorite generators are all produced by adopting an electrolytic method, and an electrolytic cell reacts as follows: NaCl + H2O → NaClO + H2, the reaction of which can generate sodium hypochlorite and continuously generate hydrogen, and the hydrogen generated by the preparation equipment during electrolysis can remain in the electrolytic cell and a large amount of delivery pumps and pipelines which are passed during delivery to the sodium hypochlorite storage tank. It is known that hydrogen is a dangerous gas which is flammable and explosive, in order to prevent excessive hydrogen from exploding due to incomplete exhaustion and to prevent the impeller and the casing of the pump from being damaged by cavitation when the delivery pump delivers a large amount of hydrogen and solution mixture.
For solving above-mentioned technical problem, can normally be at electrolysis trough and sodium hypochlorite storage tank direct design installation hydrogen discharging device, be as for patent number: CN202020180791.1 discloses a hydrogen discharge device applied to sodium hypochlorite preparation equipment, which comprises an electrolytic cell and a sodium hypochlorite storage tank, wherein a water seal tank is arranged in the sodium hypochlorite storage tank; the outlet of the electrolytic cell is connected with one interface of a three-way pipe through an electrolyte conveying pipeline, the other two interfaces of the three-way pipe are respectively connected with an upward branch pipe and a downward branch pipe, the downward branch pipe extends into the lower part of a water seal tank in a sodium hypochlorite storage tank, the upward branch pipe is communicated with a Venturi tube hydrogen discharge pipeline, the outlet at the top of the sodium hypochlorite storage tank is connected with the Venturi tube hydrogen discharge pipeline, and the inlet at the top of the sodium hypochlorite storage tank is connected with an air blower through a pipeline; the bottom of the sodium hypochlorite storage tank is connected with a product delivery pipeline.
Above-mentioned hydrogen of this kind of exhaust device output when can be used for discharging sodium hypochlorite production, but this kind of exhaust device overall structure is complicated, and make into highly, greatly reduced result of use, and the hydrogen of output mainly discharges by the air-blower during sodium hypochlorite production, hydrogen in its electrolysis trough is difficult for discharging, hydrogen in the electrolysis trough causes the accumulation easily, electrolyte liquid level in the electrolysis trough can be depressed to the hydrogen atmospheric pressure of accumulation, and then it is unsatisfactory to cause the electrolytic effect, the production is being produced in the influence, and when the electrolysis in the electrolysis trough, the incrustation scale is easily produced to the electrolysis trough content, influence electrolysis effect and production efficiency.
Disclosure of Invention
The invention aims to provide sodium hypochlorite production equipment with a hydrogen exhaust device and a production method thereof, which have the advantages of simple structure, capability of discharging hydrogen generated in sodium hypochlorite production in real time, capability of automatically producing sodium hypochlorite, capability of automatically pickling an electrolytic cell, avoidance of scale in the electrolytic cell and high overall automation degree.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a sodium hypochlorite production facility with hydrogen discharging device, including the production host computer, install the electrolysis trough in the production host computer, the electrolysis trough is supplied power by electrolysis power, the water softener is installed to one side of production host computer, the thick salt case, explosive box and acid storage box, the inlet department intercommunication of electrolysis trough has mixed pipeline, the liquid outlet of water softener passes through conduit and mixed pipeline's inlet intercommunication, the liquid outlet of thick salt case is through joining in marriage salt pipeline and mixed pipeline's inlet intercommunication, the liquid outlet of acid storage box passes through pickling pipeline and mixed pipeline's inlet intercommunication, the liquid outlet of electrolysis trough passes through liquid pipeline and explosive box intercommunication, it has the gas-liquid separation device who is used for output hydrogen when constantly discharging sodium hypochlorite production to establish ties on the drain pipe, sodium hypochlorite production facility with hydrogen discharging device carries out automated control by control system.
The following is a further optimization of the above technical solution of the present invention:
the liquid outlet pipeline comprises a medicine outlet pipe, one end of the medicine outlet pipe is communicated with the liquid outlet end of the electrolytic bath, the other end of the medicine outlet pipe is communicated with a liquid outlet branch pipe and a pickling return pipe, the other end of the liquid outlet branch pipe is communicated with the gas-liquid separation device, the other end of the pickling return pipe is communicated with the acid storage tank, a medicine outlet valve is connected to the liquid outlet branch pipe in series, and a pickling return valve is connected to the pickling return pipe in series.
Further optimization: the gas-liquid separation device comprises a gas-liquid separation pipe which is vertically arranged, the upper end of the gas-liquid separation pipe is communicated with a gas-liquid separation tee joint, the upper end of the gas-liquid separation tee joint is communicated with an air outlet pipe, the other end of the gas-liquid separation tee joint is communicated with a liquid inlet pipe, and the liquid inlet pipe is communicated with a liquid outlet of the liquid outlet branch pipe.
Further optimization: a U-shaped pipe is communicated with a liquid outlet below the gas-liquid separation pipe, the other end of the U-shaped pipe is positioned above the middle part of the gas-liquid separation pipe, the other end of the U-shaped pipe is communicated with a liquid outlet pipe, and the other end of the liquid outlet pipe is communicated with the medicine storage box.
Further optimization: the liquid level in the gas-liquid separation pipe is flush with one end, close to the liquid outlet pipe, of the U-shaped pipe, the pipe diameter of the gas-liquid separation pipe is larger than that of the liquid inlet pipe, and the pipe diameter of the gas-liquid separation pipe is larger than that of the U-shaped pipe.
Further optimization: the hydraulic pipe way includes the raceway with the water softener intercommunication, the liquid outlet and the mixed pipeline intercommunication of raceway, it has water inlet solenoid valve and flowmeter to establish ties on the raceway, the intercommunication has the water delivery branch pipe between raceway and the strong brine case, it has the branch road solenoid valve to establish ties on the water delivery branch pipe, join in marriage the salt pipeline and include the strong brine drain pipe with strong brine case intercommunication, the other end and the mixed pipeline intercommunication of strong brine drain pipe, it joins in marriage the salt pump to establish ties on the strong brine drain pipe, the mixed pipeline has the dilute brine valve.
Further optimization: the pickling pipeline comprises a pickling pipe, the liquid outlet end of the pickling pipe is communicated with the mixing pipeline, the liquid inlet end of the pickling pipe is communicated with the acid storage tank, a pickling pump is installed on the pickling pipe in series, and a pickling inlet valve is connected to the position, close to the mixing pipeline, of the pickling pipe in series.
Further optimization: the control system comprises a PLC main controller, the input end and the output end of the PLC main controller are electrically connected with a control screen in a bidirectional mode, and the output end of the PLC main controller is electrically connected with the control ends of the liquid outlet electromagnetic valve, the liquid medicine outlet valve, the acid washing return valve, the back flushing valve, the acid washing inlet valve, the blow-down valve, the water inlet electromagnetic valve, the branch electromagnetic valve, the dilute brine valve, the liquid medicine outlet valve, the salt proportioning pump, the medicine feeding pump and the acid washing pump respectively.
The invention also provides a sodium hypochlorite production method, which is based on the sodium hypochlorite production equipment with the hydrogen discharge device and comprises a sodium hypochlorite production step, an acid pickling step, a backwashing step and a sodium hypochlorite adding step;
the sodium hypochlorite production step comprises:
s1, proportioning dilute brine: the PLC main controller controls the water softener and the salt blending pump to work, softened water in the water softener is conveyed into the mixing pipeline through a water conveying pipe, the salt blending pump is used for conveying strong brine in the strong brine box into the mixing pipeline, and the strong brine and the softened water are mixed to obtain dilute brine;
s2, preparing sodium hypochlorite liquid medicine: the PLC main controller controls a dilute brine valve and an electrolytic power supply to be opened, dilute brine in the mixing pipeline is conveyed into an electrolytic cell, the electrolytic power supply supplies power to the electrolytic cell, the power supply current is 0-200A, and the electrolytic cell electrolyzes the dilute brine to prepare sodium hypochlorite liquid medicine;
s3, storing sodium hypochlorite liquid medicine: the PLC main controller controls the medicine outlet valve and the liquid outlet electromagnetic valve to be opened, the sodium chlorate liquid medicine prepared in the electrolytic bath is conveyed to the gas-liquid separation device through the medicine outlet pipe and the liquid outlet branch pipe, the gas-liquid separation device is used for separating the sodium hypochlorite liquid medicine from hydrogen, and the sodium hypochlorite liquid medicine in the gas-liquid separation device is conveyed to the medicine storage box to be stored.
The following is a further optimization of the above technical solution of the present invention:
the pickling step comprises:
x1, preparing a pickling solution: preparing a pickling solution in an acid storage box,
x2, pickling scale: introducing a pickling solution into the electrolytic cell to clean scale in the electrolytic cell;
x3 and acid washing liquid reflux: the pickling solution in the electrolytic bath flows back to the acid storage tank through the chemical outlet pipe and the pickling return pipe;
the back washing step comprises:
f1, backwashing: introducing softened water into the electrolytic cell to flush the electrolytic cell;
f2, flush water discharge: the waste water in the electrolytic bath is discharged through a drain valve and a drain pipe;
the sodium hypochlorite adding step comprises:
t1, outputting sodium hypochlorite liquid: sodium hypochlorite liquid medicine in the medicine storage box is taken through the liquid medicine conveying pipe and the medicine adding pump and is conveyed in a pressurizing mode, and the sodium hypochlorite liquid medicine is added.
By adopting the technical scheme, the invention has the advantages of ingenious design and reasonable structure, and the sodium hypochlorite production equipment with the hydrogen discharge device and the sodium hypochlorite production method can be used for proportioning the concentrated brine and the softened water on line to obtain equal proportion dilute brine, and preparing the sodium hypochlorite liquid medicine by electrolyzing the dilute brine through the electrolytic tank 1, so that the indexes of the produced sodium hypochlorite liquid medicine are kept uniform, and the production efficiency and the production effect can be improved.
The invention is further illustrated with reference to the following figures and examples.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a side view of the overall structure of an embodiment of the present invention;
FIG. 3 is a side view of another side of the overall structure in an embodiment of the present invention;
FIG. 4 is a schematic diagram of the connection of the pipes in the embodiment of the present invention;
FIG. 5 is a schematic process flow diagram according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a gas-liquid separation apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a control system according to an embodiment of the present invention.
In the figure: 1-an electrolytic cell; 2-a salt preparation pump; 3-a dosing pump; 4-a pressure gauge; 5-a gas-liquid separation device; 51-a gas-liquid separation tube; 52-liquid inlet pipe; 53-gas-liquid separation tee; 54-air outlet pipe; a 55-U shaped tube; 56-liquid outlet pipe; 57-liquid outlet electromagnetic valve; 6-concentrated salt box; 7-a medicine storage box; 8-a medicine outlet valve; 9-a water softener; 10-acid washing back valve; 11-a back flush valve; 12-a flow meter; 13-acid washing pump; 14-acid wash inlet valve; 15-a blowdown valve; 17-production host; 18-acid storage tank; 19-a mixing line; 20-water conveying pipe; 21-a hydrogen discharge pipe; 22-a water inlet electromagnetic valve; 24-water delivery branch pipes; 25-branch electromagnetic valve; 26-a strong brine outlet pipe; 27-a back-flushing pipeline; 28-pickling the tube; 30-an electrolytic power supply; 31-dilute brine valve; 32-a sewage draining pipe; 33-back pressure valve; 34-a medicine outlet pipe; 35-liquid outlet branch pipe; 36-acid washing water return pipe; 38-hydrogen discharge port; 39-liquid medicine delivery pipe; 40-PLC main controller; 41-control screen; 42-timing unit.
Detailed Description
Example (b): referring to fig. 1-7, a sodium hypochlorite production apparatus with hydrogen discharge device comprises a production host 17, the production host 17 is internally provided with an electrolytic cell 1, one side of the production host 17 is provided with a water softener 9, a concentrated salt box 6, a medicine storage box 7 and an acid storage box 18, a mixing pipeline 19 is communicated with the liquid inlet of the electrolytic cell 1, the liquid outlet of the water softener 9 is communicated with the liquid inlet of the mixing pipeline 19 through a water conveying pipeline, the liquid outlet of the concentrated salt tank 6 is communicated with the liquid inlet of the mixing pipeline 19 through a salt-blending pipeline, the liquid outlet of the acid storage tank 18 is communicated with the liquid inlet of the mixing pipeline 19 through an acid washing pipeline, the liquid outlet of the electrolytic cell 1 is communicated with the medicine storage box 7 through a liquid outlet pipeline, a gas-liquid separation device 5 for producing hydrogen when sodium hypochlorite is discharged constantly is connected in series on the liquid outlet pipeline, and sodium hypochlorite production equipment with a hydrogen discharge device is automatically controlled by a control system.
Design like this, accessible water softener 9 is used for preparing the demineralized water to can carry the demineralized water in the water softener 9 to the mixing pipeline 19 in through the hydraulic pipeline, the storage in concentrated salt case 6 has the strong brine, strong brine in the concentrated salt case 6 is carried to the mixing pipeline 19 in through joining in marriage the salt pipeline, and the strong brine carries out the homogeneous mixing with the demineralized water in the mixing pipeline 19 this moment and obtains the dilute brine, and the dilute brine is carried to 1 in the electrolysis trough by mixing pipeline 19, and 1 pair of electrolysis of dilute brine obtains the sodium hypochlorite liquid medicine.
The sodium hypochlorite liquid medicine of production stores in electrolytic cell 1 passes through drain pipe water conservancy diversion to explosive box 7, and when the interior sodium hypochlorite liquid medicine of drain pipe flowed through gas-liquid separation device 5 this moment, gas-liquid separation device 5 was used for advancing the separation to sodium hypochlorite liquid medicine and hydrogen, and then makes the 5 discharges of hydrogen accessible gas-liquid separation device in the sodium hypochlorite liquid medicine, facilitates the use.
After the incrustation scale is generated in the electrolytic tank 1, the water pipeline and the salt distribution pipeline can be closed, the pickling pipeline is opened, the pickling pipeline is used for conveying the pickling solution in the acid storage tank 18 to the electrolytic tank 1 through the mixing pipeline 19, and the pickling solution is used for cleaning the incrustation scale in the electrolytic tank 1 and is convenient to use.
The water conveying pipeline comprises a water conveying pipe 20, a liquid inlet of the water conveying pipe 20 is communicated with a liquid outlet of the water softener 9, and a liquid outlet of the water conveying pipe 20 is communicated with a liquid inlet of the mixing pipeline 19.
The water inlet of the water softener 9 is communicated with a municipal water supply pipe through a communicating pipe, and tap water in the municipal water supply pipe is conveyed into the water softener 9 under the state of self pressure.
The water softener 9 is used for processing tap water into softened water, and the softened water processed by the water softener 9 can enter the water conveying pipe 20 and then enter the mixing pipeline 19 through the guiding of the water conveying pipe 20.
The water outlet of the water softener 9 is communicated with a pressure gauge 4, and the pressure gauge 4 is used for detecting the water pressure in the water softener 9.
The water delivery pipe 20 is sequentially and serially provided with a water inlet electromagnetic valve 22 and a flowmeter 12, the water inlet electromagnetic valve 22 is an electromagnetic valve, the water inlet electromagnetic valve 22 automatically controls the on-off of the water delivery pipe 20, and the flowmeter 12 is used for detecting the real-time flow of softened water in the water delivery pipe 20.
The water pipe 20 is communicated with a water delivery branch pipe 24, the water inlet end of the water delivery branch pipe 24 is positioned on the water pipe 20 between the water inlet electromagnetic valve 22 and the flowmeter 12, and the water outlet end of the water delivery branch pipe 24 is communicated with the concentrated salt tank 6.
The branch water delivery branch pipe 24 is connected in series with a branch electromagnetic valve 25, the branch electromagnetic valve 25 is arranged on the branch water delivery pipe 24 and is close to the position of the water delivery pipe 20, and the branch electromagnetic valve 25 is used for automatically controlling the on-off of the branch water delivery pipe 24.
Design like this, accessible branch road solenoid valve 25 is used for automated control water delivery branch pipe 24's break-make, and then lets in the demineralized water when preparing the strong brine in needs to strong brine case 6, can open branch road solenoid valve 25, and the demineralized water in the raceway 20 passes through water delivery branch pipe 24 this moment and carries to strong brine case 6 in for prepare the strong brine.
Join in marriage salt pipeline and include strong brine drain pipe 26, the one end of strong brine drain pipe 26 and the liquid outlet intercommunication of strong brine case 6, the other end of strong brine drain pipe 26 and the inlet intercommunication of hybrid pipeline 19, it joins in marriage salt pump 2 to establish ties on the strong brine drain pipe 26.
The strong brine that has stored in the strong brine case 6, join in marriage salt pump 2 work and be used for the strong brine of suction strong brine case 6 and the pressurization is carried to mixing tube 19 in through strong brine drain pipe 26, and the strong brine carries out the homogeneous mixing with the demineralized water in mixing tube 19 this moment and obtains the dilute brine.
The liquid inlet of the mixing pipeline 19 is communicated with a three-way joint, the mixing pipeline 19 is respectively communicated with the water delivery pipe 20 and the concentrated brine outlet pipe 26 through the three-way joint, and the liquid outlet of the mixing pipeline 19 is communicated with the liquid inlet of the electrolytic cell 1.
The dilute brine in the mixing pipeline 19 is conveyed into the electrolytic cell 1 through the guide of the mixing pipeline 19, and the electrolytic cell 1 electrolyzes the dilute brine to obtain sodium hypochlorite liquid medicine.
Outside this embodiment, in order to improve the mixed effect of the dilute brine in the mixing pipeline 19, but the pipeline mixer that connects in series on the mixing pipeline 19, the pipeline mixer is used for making the dilute brine that circulates in the mixing pipeline 19 carry out the homogeneous mixing, improves the result of use.
A dilute brine valve 31 is connected in series on the mixing pipeline 19 at a position close to the electrolytic cell 1, and the dilute brine valve 31 is used for controlling the on-off of the mixing pipeline 19.
The dilute brine valve 31 is an electromagnetic valve, and the dilute brine valve 31 is connected in series to the mixing pipeline 19, so that the dilute brine valve 31 can be used for automatically controlling the on-off of the mixing pipeline 19.
A drain pipe 32 is communicated with the mixing pipeline 19 at the downstream position of the dilute brine valve 31, and the other end of the drain pipe 32 is communicated with a drain main pipe.
The blow-off pipe 32 is connected in series with a blow-off valve 15, and the blow-off valve 15 is used for controlling the on-off of the blow-off pipe 32.
By the design, when sewage needs to be discharged, the sewage discharge valve 15 can be opened, and at the moment, sewage in the mixing pipeline 19 and the electrolytic tank 1 is discharged through the sewage discharge pipe 32, so that the use is convenient.
The pickling pipeline comprises a pickling pipe 28, the liquid outlet end of the pickling pipe 28 is communicated with the mixing pipeline 19, and the liquid outlet end of the pickling pipe 28 is positioned on the mixing pipeline 19 and close to the electrolytic tank 1.
The liquid inlet end of the pickling pipe 28 is communicated with the liquid outlet of the acid storage tank 18, and the pickling pump 13 is installed on the pickling pipe 28 in series.
Store up and store up the pickling water in the case 18, pickling pump 13 work is used for pumping the pickling water in the case 18 and the pressurization is carried to pickling pipe 28 in, and the pickling water in the pickling pipe 28 passes through mixed pipeline 19 and carries to the electrolysis trough 1 in, and the pickling water can wash the incrustation scale in the electrolysis trough 1 this moment, facilitates the use.
A pickling inlet valve 14 is connected in series on the pickling pipe 28 at a position close to the mixing pipeline 19, and the pickling inlet valve 14 is used for controlling the on-off of the pickling pipe 28.
The pickling inlet valve 14 is an electromagnetic valve, and the pickling inlet valve 14 is installed on the pickling pipe 28 in series, so that the pickling pipe 28 can be automatically switched on and off through the pickling inlet valve 14.
In this way, when the scale is cleaned by introducing the pickling solution into the electrolytic bath 1, the dilute brine valve 31 is first closed, the dilute brine valve 31 is closed to cut off the flow of the mixing line 19, and the dilute brine valve 31 is closed to prevent the pickling solution fed from the pickling line 28 into the mixing line 19 from flowing back into the concentrated brine tank 6.
Then the acid washing inlet valve 14 and the acid washing pump 13 are opened, at the moment, the acid washing pump 13 works to suck the acid washing liquid in the acid storage tank 18 and pressurize and convey the acid washing liquid into the acid washing pipe 28, then the acid washing liquid in the acid washing pipe 28 is conveyed into the electrolytic tank 1 through the mixing pipeline 19, so that the acid washing liquid is introduced into the electrolytic tank 1, and at the moment, the acid washing liquid can be used for cleaning the scale in the secondary electrolytic tank 1.
The pickling solution is stored in the pickling tank 18 and is prepared by mixing citric acid and water in a ratio of: 1 part of citric acid: and 2, water, wherein the hydrochloric acid concentration of the pickling solution is not more than 3%.
The liquid outlet pipeline comprises a medicine outlet pipe 34, one end of the medicine outlet pipe 34 is communicated with the liquid outlet end of the electrolytic cell 1, and the other end of the medicine outlet pipe 34 is communicated with a liquid outlet branch pipe 35 and an acid washing water return pipe 36 through a three-way joint.
The other end of the liquid outlet branch pipe 35 is communicated with the gas-liquid separation device 5, the liquid outlet end of the gas-liquid separation device 5 is communicated with the liquid inlet of the medicine storage box 7, and the other end of the pickling water return pipe 36 is communicated with the water return port of the acid storage box 18.
The position of the liquid outlet branch pipe 35 close to the medicine outlet pipe 34 is connected in series with a medicine outlet valve 8, and the medicine outlet valve 8 is used for controlling the on-off of the liquid outlet branch pipe 35.
The medicine outlet valve 8 is an electromagnetic valve, and the medicine outlet valve 8 is installed on the liquid outlet branch pipe 35 in series, so that the on-off of the liquid outlet branch pipe 35 can be automatically controlled through the medicine outlet valve 8.
Design like this, when opening out medicine valve 8, can make play liquid branch pipe 35 and play pencil 34 intercommunication, the sodium hypochlorite liquid medicine that the preparation was accomplished in 1 electrolytic cell at this moment is carried to gas-liquid separation device 5 in through going out pencil 34 and play liquid branch pipe 35, gas-liquid separation device 5 is used for separating sodium hypochlorite liquid medicine and hydrogen this moment, the hydrogen discharge that is mingled with in the messenger sodium hypochlorite liquid medicine, then separate the sodium hypochlorite liquid medicine that accomplishes hydrogen in gas-liquid separation device 5 and carry and save in the explosive box 7.
The pickling return valve 10 is connected in series at a position on the pickling return pipe 36 close to the chemical outlet pipe 34, and the pickling return valve 10 is used for controlling the on-off of the pickling return pipe 36.
The pickling return valve 10 is an electromagnetic valve, the pickling return valve 10 is installed on the pickling return pipe 36 in series, and the pickling return valve 10 can automatically control the on-off of the pickling return pipe 36, so that the pickling return valve is convenient to use.
By the design, when acid washing is conducted into the electrolytic tank 1 through the acid washing pipe 28, the medicine outlet valve 8 can be closed, the acid washing return valve 10 can be opened, at the moment, the medicine outlet valve 8 is used for cutting off the liquid outlet branch pipe 35, and therefore acid washing liquid output from the electrolytic tank 1 is prevented from entering the medicine storage box 7;
and the pickling solution output from the electrolytic bath 1 flows back to the acid storage tank 18 through the chemical outlet pipe 34 and the pickling return pipe 36, so that the use is convenient.
A hydrogen discharge pipe 21 is communicated above the liquid outlet end of the electrolytic cell 1, and hydrogen generated in the electrolytic cell 1 is discharged through the hydrogen discharge pipe 21, so that the use is convenient.
The gas-liquid separation device 5 comprises a gas-liquid separation pipe 51 which is vertically arranged, the upper end of the gas-liquid separation pipe 51 is communicated with a gas-liquid separation tee 53, the upper end of the gas-liquid separation tee 53 is communicated with a gas outlet pipe 54, the other end of the gas-liquid separation tee 53 is communicated with a liquid inlet pipe 52, and the liquid inlet pipe 52 is communicated with a liquid outlet of the liquid outlet branch pipe 35.
The outlet tube 54 is in communication with the outside atmosphere.
The sodium hypochlorite liquid medicine prepared in the electrolytic cell 1 is conveyed into the liquid inlet pipe 52 of the gas-liquid separation device 5 through the medicine outlet pipe 34 and the liquid outlet branch pipe 35, and at the moment, the liquid inlet pipe 52 guides the sodium hypochlorite liquid medicine to enter the gas-liquid separation pipe 51 through the gas-liquid separation tee joint 53.
At this time, when the sodium hypochlorite liquid medicine enters the gas-liquid separation pipe 51, the hydrogen in the sodium hypochlorite liquid medicine rises under the action of the fall, the rising hydrogen enters the gas outlet pipe 54 through the gas-liquid separation tee joint 53, and the gas outlet pipe 54 is used for guiding the hydrogen to be discharged outdoors, so that the hydrogen in the sodium hypochlorite liquid medicine is discharged, and the use is convenient.
The pipe diameter of the gas-liquid separation pipe 51 is larger than that of the liquid inlet pipe 52.
Design like this, design into the pipe diameter that is greater than feed liquor pipe 52 through the pipe diameter with gas-liquid separation pipe 51, can make gas-liquid separation pipe 51's cross-sectional area be greater than feed liquor pipe 52's cross-sectional area, and then can cache the sodium hypochlorite liquid medicine in feed liquor pipe 52 through gas-liquid separation pipe 51, and can make the drop between feed liquor pipe 52 and the gas-liquid separation pipe 51 increase, and then make feed liquor pipe 52 carry the sodium hypochlorite liquid medicine to the gas-liquid separation pipe 51 in and carry out better gas-liquid separation, improve the separation effect to hydrogen in the sodium hypochlorite liquid medicine, and the use effect is improved.
A liquid outlet is formed below the gas-liquid separation pipe 51, a U-shaped pipe 55 is communicated with the liquid outlet below the gas-liquid separation pipe 51, the other end of the U-shaped pipe 55 is located at the upper middle position of the gas-liquid separation pipe 51, a liquid outlet pipe 56 is communicated with the other end of the U-shaped pipe 55, and the other end of the liquid outlet pipe 56 is communicated with the medicine storage box 7.
The sodium hypochlorite liquid medicine of hydrogen that has been separated in the gas-liquid separation pipe 51 enters the U-shaped pipe 55 through the liquid outlet, the U-shaped pipe 55 guides the sodium hypochlorite liquid medicine to enter the liquid outlet pipe 56, and the liquid outlet pipe 56 is used for guiding the sodium hypochlorite liquid medicine to enter the medicine storage box 7 for storage.
Design like this, through setting up the other end with U-shaped pipe 55 at gas-liquid separation pipe 51's middle part position on the upper side to through the water pressure principle, can make the liquid level of the sodium hypochlorite liquid medicine in gas-liquid separation pipe 51 and the one end parallel and level that U-shaped pipe 55 is close to drain pipe 56, and then can make and form the drop between liquid level in gas-liquid separation pipe 51 and the gas-liquid separation tee bend 53, and then improve the gas-liquid separation effect to the sodium hypochlorite liquid medicine, improve the result of use.
The pipe diameter of the gas-liquid separation pipe 51 is larger than that of the U-shaped pipe 55.
By the design, the cross-sectional area of the gas-liquid separation pipe 51 is larger than that of the U-shaped pipe 55, so that the gas-liquid separation effect of the sodium hypochlorite liquid medicine can be improved, and the using effect is improved.
A liquid outlet electromagnetic valve 57 is connected in series on the U-shaped pipe 55 at a position close to the liquid outlet pipe 56, and the liquid outlet electromagnetic valve 57 is used for controlling the on-off of the U-shaped pipe 55.
The liquid outlet electromagnetic valve 57 is a battery valve, and the liquid outlet electromagnetic valve 57 is connected in series on the U-shaped pipe 55, so that the on-off of the U-shaped pipe 55 can be automatically controlled through the liquid outlet electromagnetic valve 57, and the use is convenient.
Outside this embodiment, can also lay the row's of hydrogen pipeline that is used for discharging hydrogen in the explosive box 7 on the explosive box 7, the row's of hydrogen pipeline includes defeated tuber pipe, the one end of defeated tuber pipe and the inner chamber intercommunication of explosive box 7, the other end of defeated tuber pipe and the air outlet intercommunication of hydrogen discharge fan, the air intake and the peripheral hardware atmosphere intercommunication of hydrogen discharge fan.
The medicine storage box 7 is provided with a hydrogen discharge port 38.
The hydrogen discharge fan works by introducing air into the medicine storage box 7 through the air conveying pipe, the air can blow hydrogen in the medicine storage box 7 and is discharged through the hydrogen discharge port 38, and then the hydrogen in the medicine storage box 7 can be discharged through the hydrogen discharge pipeline, so that the hydrogen discharge fan is convenient to use.
Production host 17 internal fixation installs the liquid medicine that is used for exporting the sodium hypochlorite liquid medicine and throws the pipeline, the liquid medicine is thrown the feed liquor end and the explosive box 7 intercommunication of pipeline, the liquid medicine is thrown the play medicine end and the peripheral hardware liquid medicine conveying line intercommunication of pipeline.
The liquid medicine feeding pipeline is used for sucking sodium hypochlorite liquid medicine in the medicine storage box 7 and then conveying the sodium hypochlorite liquid medicine to an external liquid medicine conveying pipeline in a pressurizing mode, and the external liquid medicine conveying pipeline is used for guiding the sodium hypochlorite liquid medicine to be fed to a position to be used.
The liquid medicine feeding pipeline comprises a liquid medicine conveying pipe 39, the liquid inlet end of the liquid medicine conveying pipe 39 is communicated with the medicine outlet of the medicine storage box 7, and the liquid outlet end of the liquid medicine conveying pipe 39 is communicated with an external liquid medicine conveying pipeline.
The liquid medicine conveying pipe 39 is connected in series with a medicine feeding pump 3, and the medicine feeding pump 3 is used for sucking sodium hypochlorite liquid medicine in the medicine storage box 7 and conveying the sodium hypochlorite liquid medicine under pressure.
Add medicine pump 3 and adopt mechanical diaphragm pump, add medicine pump 3 and establish ties on liquid medicine conveyer pipe 39, and then add 3 work of medicine pump and can absorb the sodium hypochlorite liquid medicine in the explosive box 7 and carry out the pressurization transport, facilitate the use.
The liquid medicine conveyer pipe 39 is located the liquid outlet department intercommunication that adds the medicine pump 3 and is had back pressure valve 33, back pressure valve 33 can prevent the sodium hypochlorite liquid medicine backward flow in the liquid medicine conveyer pipe 39 to can keep adding the liquid outlet of medicine pump 3 and have a constant pressure, facilitate the use.
A back flushing pipeline 27 is communicated with a liquid outlet of the water softener 9, and the other end of the flushing pipeline 91 is communicated with a liquid outlet of the electrolytic cell 1.
The back-flushing pipeline 27 is connected in series with a back-flushing valve 11, and the back-flushing valve 11 is used for controlling the on-off of the back-flushing pipeline 27.
The back-flushing valve 11 is an electromagnetic valve, and the back-flushing valve 11 is connected in series on the back-flushing pipeline 27, so that the back-flushing valve 11 can automatically control the on-off of the back-flushing pipeline 27, and the use is convenient.
When the electrolytic tank 1 needs to be flushed, the back flush valve 11 and the blow-off valve 15 are firstly opened, the dilute brine valve 31 and the acid washing inlet valve 14 are closed, softened water output by the water softener 9 is conveyed into the electrolytic tank 1 through the back flush pipeline 27, the electrolytic tank 1 is flushed by the softened water, and the flushed wastewater is discharged through the blow-off valve 15 and the blow-off pipe 32, so that the use is convenient.
The electrolytic cell 1 is powered by an electrolytic power supply 30, and a positive terminal and a negative terminal of the electrolytic power supply 30 are respectively and electrically connected with a corresponding positive terminal and a corresponding negative terminal of the electrolytic cell 1.
The current output from the electrolysis power supply 30 is 0 to 200A.
The electrolytic power supply 30 supplies power to the electrolytic cell 1, and at the moment, the electrolytic cell 1 electrolyzes the dilute brine in the electrolytic cell 1 to obtain sodium hypochlorite liquid medicine.
The electrolysis power supply 30 is fixedly arranged in the production host 17.
The control system comprises a PLC main controller 40, wherein the input end and the output end of the PLC main controller 40 are electrically connected with a control screen 41 in a bidirectional mode, and the control screen 41 is fixedly installed on the production host 17.
The control panel 41 can issue commands to control the PLC master controller 40.
And the control ends of the liquid outlet electromagnetic valve 57, the liquid medicine outlet valve 8, the acid washing return valve 10, the back washing valve 11, the acid washing inlet valve 14, the blow-down valve 15, the water inlet electromagnetic valve 22, the branch electromagnetic valve 25, the dilute brine valve 31 and the liquid medicine outlet valve 8 are respectively and electrically connected with the output end of the PLC main controller 40.
The PLC main controller 40 outputs control signals for respectively and independently controlling the liquid outlet electromagnetic valve 57, the medicine outlet valve 8, the pickling return valve 10, the backwashing valve 11, the pickling inlet valve 14, the blow-off valve 15, the water inlet electromagnetic valve 22, the branch electromagnetic valve 25, the dilute brine valve 31 and the medicine outlet valve 8 to be switched on and off.
The PLC main controller 40 sends out a control signal to control the opening or closing of the liquid outlet electromagnetic valve 57, and the liquid outlet electromagnetic valve 57 is used for controlling the on-off of the U-shaped pipe 55.
The PLC main controller 40 sends out a control signal to control the opening or closing of the medicine outlet valve 8, and the medicine outlet valve 8 is used for controlling the on-off of the liquid outlet branch pipe 35.
The PLC main controller 40 sends out control signals to control the opening or closing of the acid washing return valve 10 and the acid washing inlet valve 14, the acid washing return valve 10 is used for controlling the on-off of the acid washing return pipe 36, and the acid washing inlet valve 14 is used for controlling the on-off of the acid washing pipe 28.
The PLC main controller 40 sends out a control signal to control the back washing valve 11 to be opened or closed, and the back washing valve 11 is used for controlling the back washing pipeline 27 to be switched on or switched off.
The PLC main controller 40 sends a control signal to control the on-off of the blow-off pipe 32 through the blow-off valve 15 when the blow-off valve 15 is controlled to be opened or closed.
The PLC main controller 40 sends out a control signal to control the water inlet electromagnetic valve 22 to be opened or closed, and the PLC main controller is used for controlling the on-off of the water conveying pipe 20 through the water inlet electromagnetic valve 22.
The PLC main controller 40 sends out a control signal to control the branch electromagnetic valve 25 to be opened or closed, and the branch electromagnetic valve 25 is used for controlling the on-off of the water delivery branch pipe 24.
The control ends of the water softener 9 and the electrolysis power supply 30 are respectively electrically connected with the output end of the PLC main controller 40, and the PLC main controller 40 outputs control signals for respectively and independently controlling the water softener 9 and the electrolysis power supply 30 to work.
The control ends of the salt preparation pump 2, the dosing pump 3 and the pickling pump 13 are respectively electrically connected with the output end of the PLC main controller 40.
The PLC main controller 40 outputs control signals for respectively and independently controlling the salt preparation pump 2, the dosing pump 3 and the pickling pump 13 to work.
The PLC main controller 40 sends out a control signal to control the water softener 9 to work, and the water softener 9 works to prepare softened water.
The PLC main controller 40 sends out a control signal to control the electrolysis power supply 30 to work, and the electrolysis power supply 30 works to supply power for the electrolytic cell 1.
PLC main control unit 40 sends control signal control and joins in marriage salt pump 2 work, join in marriage salt pump 2 work and be used for the strong brine of suction strong brine case 6 and the pressurization is carried to mixing tube 19 in through strong brine drain pipe 26.
The PLC main controller 40 sends a control signal to control the medicine adding pump 3 to work, and the medicine adding pump 3 works and is used for sucking sodium hypochlorite liquid medicine in the medicine storage box 7 through the liquid medicine conveying pipe 39 and conveying the sodium hypochlorite liquid medicine in a pressurizing mode.
The PLC main controller 40 sends out a control signal to control the work of the pickling pump 13, and the work of the pickling pump 13 is used for sucking the pickling solution in the acid storage tank 18 through the pickling pipe 28 and conveying the pickling solution to the electrolytic cell 1 in a pressurizing manner.
The output end and the input end of the PLC main controller 40 are electrically connected with a timing unit 42 in a bidirectional mode, the timing unit 42 is used for timing the working time of the electrolytic cell 1, and then the PLC main controller 40 conducts periodical control on the pickling pipeline according to the working time to conduct pickling on the electrolytic cell 1.
When the timing of the timing unit 42 reaches a set time, the timing unit 42 sends a feedback signal to the PLC main controller 40, and at this time, the PLC main controller 40 determines that scale has been generated in the electrolytic bath 1 and needs pickling.
The invention also provides a sodium hypochlorite production method, which is based on the sodium hypochlorite production equipment with the hydrogen discharge device and comprises a sodium hypochlorite production step, an acid washing step, a backwashing step and a sodium hypochlorite adding step.
The sodium hypochlorite production step comprises:
s1, proportioning dilute brine: firstly, the PLC main controller 40 controls the water softener 9, the water inlet electromagnetic valve 22 and the salt preparation pump 2 to work, at the moment, softened water in the water softener 9 is conveyed into the mixing pipeline 19 through the water inlet electromagnetic valve 22, the water conveying pipe 20 and the flowmeter 12, the salt preparation pump 2 is used for sucking strong brine in the strong brine tank 6 and conveying the strong brine into the mixing pipeline 19 through the strong brine outlet pipe 26, and the strong brine and the softened water are mixed to obtain the weak brine.
In step S1, the PLC main controller 40 further controls the branch solenoid valve 25, the blowdown valve 15, the acid washing inlet valve 14, and the acid washing return valve 10 to close.
The branch electromagnetic valve 25 is closed to disconnect the water delivery branch pipe 24, thereby preventing the softened water in the water delivery pipe 20 from entering the water delivery branch pipe 24.
The blowoff valve 15 closes to cut off the communication of the blowoff pipe 32, thereby preventing the dilute brine in the mixing pipe 19 from entering the blowoff pipe 32.
The acid inlet valve 14 is used to disconnect the acid washing pipe 28, thereby preventing the dilute brine in the mixing pipeline 19 from entering the acid washing pipe 28.
The acid washing return valve 10 is closed to disconnect the acid washing return pipe 36, so that sodium hypochlorite liquid medicine in the medicine outlet pipe 34 is prevented from entering the acid washing return pipe 36.
S2, preparing sodium hypochlorite liquid medicine: the PLC main controller 40 controls the dilute brine valve 31 and the electrolysis power supply 30 to be opened, at the moment, the dilute brine in the mixing pipeline 19 is conveyed into the electrolytic cell 1, the electrolysis power supply 30 supplies power to the electrolytic cell 1, and the electrolytic cell 1 electrolyzes the dilute brine to prepare the sodium hypochlorite liquid medicine.
The current output from the electrolytic power supply 30 in step S2 is 0A to 200A.
The hydrogen gas generated when the dilute brine is electrolyzed in the electrolytic cell 1 in step S3 is discharged through the hydrogen discharge pipe 21.
S4, storing sodium hypochlorite liquid medicine: the PLC main controller 40 controls the medicine outlet valve 8 and the liquid outlet electromagnetic valve 57 to be opened, the sodium chlorate liquid medicine prepared in the electrolytic bath 1 is conveyed into the gas-liquid separation device 5 through the medicine outlet pipe 34 and the liquid outlet branch pipe 35, the gas-liquid separation device 5 is used for separating the sodium hypochlorite liquid medicine from hydrogen, and the sodium hypochlorite liquid medicine in the gas-liquid separation device 5 is conveyed into the medicine storage box 7 for storage.
In the step S4, the PLC main controller 40 further controls the acid washing return valve 10 to close, and the acid washing return valve 10 closes to disconnect the acid washing return pipe 36, thereby preventing the sodium hypochlorite liquid medicine in the medicine outlet pipe 34 from entering the acid washing return pipe 36.
In step S4, the sodium hypochlorite solution prepared in the electrolytic cell 1 is delivered into the liquid inlet pipe 52 of the gas-liquid separation device 5 through the liquid outlet pipe 34 and the liquid outlet branch pipe 35, at this time, the liquid inlet pipe 52 guides the sodium hypochlorite solution to enter the gas-liquid separation pipe 51 through the gas-liquid separation tee 53, when the sodium hypochlorite solution enters the gas-liquid separation pipe 51, hydrogen in the sodium hypochlorite solution rises due to the action of the fall, the rising hydrogen enters the gas outlet pipe 54 through the gas-liquid separation tee 53, and the gas outlet pipe 54 is used for guiding the hydrogen to be discharged out of the room, so that the hydrogen in the sodium hypochlorite solution is discharged.
The sodium hypochlorite liquid medicine that has been separated hydrogen in the gas-liquid separation pipe 51 enters the U-shaped pipe 55 through the liquid outlet, the U-shaped pipe 55 guides the sodium hypochlorite liquid medicine to enter the liquid outlet pipe 56, and the liquid outlet pipe 56 is used for guiding the sodium hypochlorite liquid medicine to enter the medicine storage box 7 for storage.
The pickling step comprises the following steps:
x1, preparing a pickling solution: preparing a pickling solution in the pickling tank 18, wherein the pickling solution is prepared by mixing citric acid and water according to the following mixing ratio: 1: 2; the hydrochloric acid concentration of the pickling solution is less than or equal to 3 percent.
In the step X1, the PLC main controller 71 controls the branch solenoid valve 25 to open, so that the water delivery branch pipe 24 is communicated with the water delivery pipe 20, the water delivery pipe 20 and the water delivery branch pipe 24 supply water to the acid storage tank 18, and the PLC main controller 40 controls the on/off time interval of the branch solenoid valve 25 to control the water supply amount.
When the acid washing solution is proportioned in the step X1, the citric acid water is moved into the acid storage tank 18 by using an acid washing pump.
X2, pickling scale: the PLC main controller 40 controls the pickling pump 13 and the pickling inlet valve 14 to be opened, and controls the salt preparation pump 2, the water inlet electromagnetic valve 22 and the dilute brine valve 31 to be closed, at the moment, the pickling pump 13 is used for sucking the pickling solution in the acid storage tank 18 and pressurizing the pickling solution to be conveyed into the electrolytic tank 1 through the pickling pipe 28 and the mixing pipeline 19, and at the moment, the pickling solution is used for cleaning the scale in the electrolytic tank 1.
In the step X2, the PLC main controller 40 determines whether or not the pickling line scale step is executed, based on a feedback signal from the timer 42.
The timing unit 42 is used for timing the working time of the electrolytic cell 1, when the timing of the timing unit 42 reaches the set time, the timing unit 42 sends a feedback signal to the PLC main controller 40, at this time, the PLC main controller 40 judges that the scale is generated in the electrolytic cell 1, and sends a control signal for controlling the scale washing step.
X3 and acid washing liquid reflux: the PLC main controller 40 controls the acid washing return valve 10 to be opened and controls the chemical outlet valve 8 to be closed, and at the moment, the acid washing liquid in the electrolytic bath 1 flows back to the acid storage tank 18 through the chemical outlet pipe 34 and the acid washing return pipe 36.
The back washing step comprises the following steps:
f1, backwashing: the PLC main controller 40 controls the back washing valve 11 to be opened, and controls the salt preparation pump 2, the water inlet electromagnetic valve 22, the dilute brine valve 31, the pickling pump 13, the pickling inlet valve 14, the medicine outlet valve 8 and the pickling return valve 10 to be closed, and at the moment, softened water output by the water softener 9 is conveyed into the electrolytic cell 1 through the back washing pipeline 27, and the electrolytic cell 1 is washed by the softened water.
F2, flush water discharge: the PLC main controller 40 controls the blow-down valve 15 to open, and the wastewater flushed in the electrolytic bath 1 is discharged through the blow-down valve 15 and the blow-off pipe 32.
The sodium hypochlorite adding step comprises:
t1, outputting sodium hypochlorite liquid: the PLC main controller 40 controls the medicine adding pump 3 to work, at the moment, the medicine adding pump 3 absorbs the sodium hypochlorite liquid medicine in the medicine storage box 7 through the liquid medicine conveying pipe 39 and conveys the sodium hypochlorite liquid medicine in a pressurizing mode, and the sodium hypochlorite liquid medicine is added.
Through above-mentioned sodium hypochlorite production facility and sodium hypochlorite production method who has the exhaust apparatus, can be used for on-line ratio strong brine and demineralized water in order to obtain equal proportion weak brine to prepare sodium hypochlorite liquid medicine through electrolysis of 1 weak brine of electrolysis trough, make the sodium hypochlorite liquid medicine index of producing keep unify, and then can improve production efficiency and production effect.
It will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in the embodiments described above without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims.

Claims (10)

1. The utility model provides a sodium hypochlorite production facility with hydrogen discharging device, includes production host computer (17), installs electrolysis trough (1) in production host computer (17), and water softener (9), strong brine case (6), explosive box (7) and acid storage case (18), its characterized in that are installed to one side of production host computer (17): the liquid inlet department intercommunication of electrolysis trough (1) has mixing pipeline (9), the liquid outlet of water softener (9) passes through the inlet intercommunication of hydraulic pipeline and mixing pipeline (19), the liquid outlet of concentrated salt case (6) is through joining in marriage the inlet intercommunication of salt pipeline and mixing pipeline (19), the liquid outlet of acid storage case (18) passes through pickling line and mixing pipeline (19) intercommunication, the liquid outlet of electrolysis trough (1) passes through the liquid outlet pipeline and communicates with explosive storage box (7), it has gas-liquid separation device (5) to establish ties on the liquid outlet pipeline.
2. The apparatus for producing sodium hypochlorite with hydrogen discharging device as claimed in claim 1, wherein: the liquid outlet pipeline comprises a liquid outlet pipe (34), one end of the liquid outlet pipe (34) is communicated with the liquid outlet end of the electrolytic tank (1), the other end of the liquid outlet pipe (34) is communicated with a liquid outlet branch pipe (35) and a pickling return pipe (36), the other end of the liquid outlet branch pipe (35) is communicated with the gas-liquid separation device (5), the other end of the pickling return pipe (36) is communicated with the acid storage tank (18), a liquid outlet valve (8) is connected to the liquid outlet branch pipe (35) in series, a pickling return valve (10) is connected to the pickling return pipe (36) in series, and the liquid outlet valve (8) and the pickling return valve (10) are automatically controlled by a control system.
3. The apparatus for producing sodium hypochlorite with hydrogen discharging device as claimed in claim 2, wherein: the gas-liquid separation device (5) comprises a gas-liquid separation pipe (51) which is vertically arranged, the upper end of the gas-liquid separation pipe (51) is communicated with a gas-liquid separation tee joint (53), the upper end of the gas-liquid separation tee joint (53) is communicated with a gas outlet pipe (54), the other end of the gas-liquid separation tee joint (53) is communicated with a liquid inlet pipe (52), and the liquid inlet pipe (52) is communicated with a liquid outlet of the liquid outlet branch pipe (35).
4. The apparatus for producing sodium hypochlorite with hydrogen discharging device as claimed in claim 3, wherein: a U-shaped pipe (55) is communicated with a liquid outlet below the gas-liquid separation pipe (51), the other end of the U-shaped pipe (55) is positioned on the upper side of the middle part of the gas-liquid separation pipe (51), a liquid outlet pipe (56) is communicated with the other end of the U-shaped pipe (55), and the other end of the liquid outlet pipe (56) is communicated with the medicine storage box (7).
5. The apparatus for producing sodium hypochlorite with hydrogen discharging device as claimed in claim 4, wherein: the liquid level in the gas-liquid separation pipe (51) is flush with one end, close to the liquid outlet pipe (56), of the U-shaped pipe (55), and the pipe diameter of the gas-liquid separation pipe (51) is larger than that of the liquid inlet pipe (52) and that of the U-shaped pipe (55).
6. The apparatus for producing sodium hypochlorite with hydrogen discharging device as claimed in claim 5, wherein: join in marriage salt pipeline and include strong brine drain pipe (26) with strong brine case (6) intercommunication, the other end and mixing line (19) intercommunication of strong brine drain pipe (26), it has dilute brine valve (31) to establish ties on mixing line (19), and it joins in marriage salt pump (2) to establish ties on strong brine drain pipe (26), and dilute brine valve (31), join in marriage salt pump (2) and carry out automated control by control system.
7. The apparatus for producing sodium hypochlorite with hydrogen discharging device as claimed in claim 6, wherein: the pickling pipeline comprises a pickling pipe (28), the liquid outlet end of the pickling pipe (28) is communicated with the mixing pipeline (19), the liquid inlet end of the pickling pipe (28) is communicated with the acid storage box (18), a pickling pump (13) and a pickling inlet valve (14) are installed on the pickling pipe (28) in series, and the pickling pump (13) and the pickling inlet valve (14) are automatically controlled by a control system.
8. The apparatus for producing sodium hypochlorite with hydrogen discharging device as claimed in claim 7, wherein: control system includes PLC main control unit (40), the input and the two-way electricity of output of PLC main control unit (40) are connected with control panel (41), the output of PLC main control unit (40) respectively with go out medicine valve (8), pickling return valve (10), dilute salt water valve (31), pickling advances valve (14), the control end electric connection of joining in marriage salt pump (2) and pickling pump (13), the output electric connection of PLC main control unit (40) has electrolysis power supply (30) that are used for carrying out the power supply for electrolysis trough (1).
9. A sodium hypochlorite production method, based on the sodium hypochlorite production equipment with hydrogen discharge device of any one of claims 1-8, characterized in that: the production method comprises a sodium hypochlorite production step, an acid pickling step, a backwashing step and a sodium hypochlorite adding step;
the sodium hypochlorite production step comprises:
s1, proportioning dilute brine: the PLC main controller (40) controls the water softener (9) and the salt blending pump (2) to work, softened water in the water softener (9) is conveyed into the mixing pipeline (19) through a water conveying pipeline, the salt blending pump (2) is used for conveying strong brine in the strong brine box (6) into the mixing pipeline (19), and the strong brine and the softened water are mixed to obtain dilute brine;
s2, preparing sodium hypochlorite liquid medicine: the PLC main controller (40) controls an electrolytic power supply (30) to be turned on and supplies power to the electrolytic cell (1), the power supply current is 0A-200A, dilute brine in the mixing pipeline (19) is conveyed into the electrolytic cell (1), and the electrolytic cell (1) electrolyzes the dilute brine to prepare sodium hypochlorite liquid medicine;
s3, storing sodium hypochlorite liquid medicine: the PLC main controller (40) controls the medicine outlet valve (8) and the liquid outlet electromagnetic valve (57) to be opened, the sodium chlorate liquid medicine prepared in the electrolytic bath (1) is conveyed into the gas-liquid separation device (5) through the medicine outlet pipe (34) and the liquid outlet branch pipe (35), the gas-liquid separation device (5) is used for separating the sodium hypochlorite liquid medicine from hydrogen, and the sodium hypochlorite liquid medicine in the gas-liquid separation device (5) is conveyed into the medicine storage box (7) to be stored.
10. A process for the production of sodium hypochlorite according to claim 9, characterized in that:
the pickling step comprises:
x1, preparing a pickling solution: preparing pickling solution in an acid storage tank (18),
x2, pickling scale: introducing a pickling solution into the electrolytic tank (1) to clean scale in the electrolytic tank (1);
x3 and acid washing liquid reflux: the pickling solution in the electrolytic bath (1) flows back to the acid storage tank (18) through the chemical outlet pipe (34) and the pickling return pipe (36);
the back washing step comprises:
f3, backwashing: introducing softened water into the electrolytic cell (1) to flush the electrolytic cell (1);
f2, flush water discharge: the waste water in the electrolytic bath (1) is discharged through a drain valve (15) and a drain pipe (32);
the sodium hypochlorite adding step comprises:
t1, outputting sodium hypochlorite liquid: sodium hypochlorite liquid in the medicine storage box (7) is taken through the liquid medicine conveying pipe (39) and the medicine adding pump (3) and is conveyed under pressure, so that the sodium hypochlorite liquid is added.
CN202110530661.5A 2021-05-15 2021-05-15 Sodium hypochlorite production equipment with hydrogen discharge device and production method thereof Pending CN113201757A (en)

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