CN110295374B - Full-automatic high-concentration sodium hypochlorite generation system - Google Patents
Full-automatic high-concentration sodium hypochlorite generation system Download PDFInfo
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- CN110295374B CN110295374B CN201910484336.2A CN201910484336A CN110295374B CN 110295374 B CN110295374 B CN 110295374B CN 201910484336 A CN201910484336 A CN 201910484336A CN 110295374 B CN110295374 B CN 110295374B
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- 239000005708 Sodium hypochlorite Substances 0.000 title claims abstract description 57
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 119
- 238000010521 absorption reaction Methods 0.000 claims abstract description 75
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 59
- 239000002253 acid Substances 0.000 claims abstract description 40
- 238000005406 washing Methods 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 238000011010 flushing procedure Methods 0.000 claims abstract description 5
- 239000003513 alkali Substances 0.000 claims description 50
- 150000003839 salts Chemical class 0.000 claims description 44
- 239000001257 hydrogen Substances 0.000 claims description 33
- 229910052739 hydrogen Inorganic materials 0.000 claims description 33
- 239000012267 brine Substances 0.000 claims description 32
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 31
- 238000011001 backwashing Methods 0.000 claims description 18
- 150000002431 hydrogen Chemical class 0.000 claims description 16
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 15
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 12
- 238000006298 dechlorination reaction Methods 0.000 claims description 10
- 239000000460 chlorine Substances 0.000 claims description 7
- 229910052801 chlorine Inorganic materials 0.000 claims description 7
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 6
- 239000013589 supplement Substances 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000008400 supply water Substances 0.000 claims description 2
- 238000005554 pickling Methods 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000004659 sterilization and disinfection Methods 0.000 description 5
- BZSXEZOLBIJVQK-UHFFFAOYSA-N 2-methylsulfonylbenzoic acid Chemical compound CS(=O)(=O)C1=CC=CC=C1C(O)=O BZSXEZOLBIJVQK-UHFFFAOYSA-N 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 101100165186 Caenorhabditis elegans bath-34 gene Proteins 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
-
- 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
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
本发明提供了一种全自动高浓度次氯酸钠发生系统，包括纯水单元、溶盐单元、电解单元、酸洗单元、溶碱单元、冷却单元、吸收单元及投加单元，所述纯水单元与所述溶盐单元、电解单元、酸洗单元、溶碱单元连接，所述电解单元与所述溶盐单元、酸洗单元、溶碱单元、冷却单元、吸收单元连接，所述吸收单元与所述冷却单元连接；所述纯水单元、溶盐单元、电解单元、酸洗单元、溶碱单元、冷却单元、吸收单元及投加单元通过PLC控制单元控制，自动执行补水、溶盐、冲洗、酸洗、循环、电解及出料动作。本发明能够在PLC的控制下全自动生产次氯酸钠溶液。
The invention provides a fully automatic high-concentration sodium hypochlorite generation system, comprising a pure water unit, a salt-dissolving unit, an electrolysis unit, a pickling unit, an alkali-dissolving unit, a cooling unit, an absorption unit and a dosing unit. The salt-dissolving unit, the electrolysis unit, the pickling unit, and the alkali-dissolving unit are connected, and the electrolysis unit is connected to the salt-dissolving unit, the acid-washing unit, the alkali-dissolving unit, the cooling unit, and the absorption unit, and the absorption unit is connected to the The cooling unit is connected; the pure water unit, the salt-dissolving unit, the electrolysis unit, the acid washing unit, the alkali-dissolving unit, the cooling unit, the absorption unit and the dosing unit are controlled by the PLC control unit, and the water replenishment, salt-dissolving, flushing, Pickling, circulation, electrolysis and discharge actions. The invention can fully automatically produce sodium hypochlorite solution under the control of PLC.
Description
Technical Field
The invention belongs to the technical field of drinking water disinfection, and particularly relates to a full-automatic high-concentration sodium hypochlorite generation system.
Background
The sodium hypochlorite solution is adopted for disinfection, although the water plant can purchase the commodity sodium hypochlorite solution for disinfection, the disinfection method adopting the commodity sodium hypochlorite solution has the problems of high cost, high pH value, easy blockage and corrosion of a feeding pump during feeding and the like, and the water plant in partial regions is inconvenient to purchase the sodium hypochlorite solution, and the number and the level of operation managers are limited. Therefore, a sodium hypochlorite solution generating device capable of realizing full-automatic control needs to be developed, and the operation is simple and convenient, and the maintenance is easy.
Disclosure of Invention
The invention aims to provide a full-automatic high-concentration sodium hypochlorite generation system to solve the technical problem.
The invention provides a full-automatic high-concentration sodium hypochlorite generation system which comprises a pure water unit, a salt dissolving unit, an electrolysis unit, an acid washing unit, an alkali dissolving unit, a cooling unit, an absorption unit and an adding unit, wherein the pure water unit is connected with the salt dissolving unit, the electrolysis unit, the acid washing unit and the alkali dissolving unit;
the pure water unit, the salt dissolving unit, the electrolysis unit, the acid washing unit, the alkali dissolving unit, the cooling unit, the absorption unit and the adding unit are controlled by the PLC control unit to automatically execute the actions of water supplementing, salt dissolving, flushing, acid washing, circulating, electrolyzing and discharging.
Further, the pure water unit comprises a pure water tank, a valve is arranged at the inlet of the pure water tank, and the outlet of the pure water tank is connected with the salt dissolving unit, the acid washing unit and the alkali dissolving unit through a pure water pump;
the PLC control unit is used for controlling the valve to be opened to supply water to the pure water tank when the water level of the pure water tank is lower than the middle position, and controlling the valve to be closed to stop supplying water to the pure water tank when the water level of the pure water tank is higher than the high position;
the PLC control unit is also used for controlling the pure water pump to stop supplying water to the salt dissolving unit, the acid washing unit and the alkali dissolving unit when the water level of the pure water tank is lower than the low level;
the PLC control unit is also used for stopping electrolysis when the electrolysis unit is lack of water.
Further, the salt dissolving unit comprises a salt dissolving tank, a refined salt water tank and a fresh salt water tank; the inlet of the salt dissolving tank is connected with the pure water unit, and the outlet of the salt dissolving tank is connected with the refined salt water tank; the refined brine tank is connected with the electrolysis unit through the brine pump, the first filter and the second filter which are connected in parallel, and the inlet of the electrolysis unit is provided with a conductivity meter; the filter is connected with the pure water unit through a back washing pipeline, and the back washing pipeline is provided with a back washing valve; the dilute brine tank is connected with the dissolved salt tank through a dilute brine circulating pump; the dilute brine tank is connected with the absorption unit; the fresh brine tank is connected with a fan;
the PLC control unit is also used for controlling the electrolysis unit to stop electrolysis when the dilute brine tank is full;
the PLC control unit is also used for controlling the back washing pipeline to carry out back washing on the first filter or the second filter and setting the back washing time of the filters;
the PLC control unit is also used for executing switching action between the first filter and the second filter;
the PLC control unit is also used for alarming and prompting when the conductivity monitoring value of the conductivity meter is lower than 400 ms/cm.
Furthermore, the electrolysis unit comprises a hydrogen water seal, a hydrogen separator, an electrolytic tank and a dechlorination tower, wherein the hydrogen water seal is connected with the hydrogen separator, the hydrogen separator is connected with the electrolytic tank, and the electrolytic tank is connected with the dechlorination tower; the hydrogen water seal is connected with a hydrogen fan; the hydrogen separator is connected with a pure water supplement pump; the electrolytic bath is connected with a brine circulating pump and an alkali liquor circulating pump; the chlorine removing tower is connected with a chlorine fan;
the PLC control unit is also used for executing the circulating electrolysis action when the hydrogen water seal liquid level is at a high level, the liquid level of the hydrogen separator is at a high level and the liquid level of the absorption unit is at a high level.
Furthermore, the acid washing unit comprises a dilute hydrochloric acid tank, the dilute hydrochloric acid tank is connected with the pure water unit and the alkali dissolving unit, and the dilute hydrochloric acid tank is connected with the electrolysis unit through a dilute hydrochloric acid metering pump and an acid washing pump; the acid washing pump is connected with an acid adding pipe;
the PLC control unit is also used for automatically carrying out water replenishing operation after the dilute hydrochloric acid tank is emptied, and then carrying out acid adding operation.
Furthermore, the absorption unit comprises a first absorption tower, a second absorption tower and a sodium hypochlorite storage tank, the first absorption tower is connected with the second absorption tower, and the first absorption tower is connected with the cooling unit through a first sodium hypochlorite absorption pump; the first absorption tower is connected with a sodium hypochlorite storage tank through a sodium hypochlorite discharge pump; the second absorption tower is connected with the dilute brine tank, the dechlorination tower and the sodium hypochlorite storage tank; the second absorption tower is connected with the cooling unit through a second sodium hypochlorite absorption pump;
the PLC control unit is also used for executing the sodium hypochlorite circulating absorption actions of the first absorption tower and the second absorption tower.
Further, the alkali dissolving unit comprises a third filter and an alkali storage tank, an inlet of the alkali storage tank is connected with the pure water unit, and an inlet of the alkali storage tank is also connected with the alkali liquor inlet pipe through the third filter; the outlet of the alkali storage tank is connected with the electrolysis unit and the absorption unit through an alkali liquid pump;
the PLC control unit is also used for controlling the lye pump to automatically add alkali to the electrolysis unit and the absorption unit before electrolysis.
Further, the adding unit comprises a sodium hypochlorite storage tank and an adding pump connected with the sodium hypochlorite storage tank;
the PLC control unit is also used for controlling the adding pump to execute sodium hypochlorite adding action.
Compared with the prior art, the invention has the beneficial effects that:
(1) can produce sodium hypochlorite solution fully automatically under PLC's control, need not manual control, it is easy and simple to handle.
(2) The system is provided with the pickling unit and the cooling unit, the pickling unit can clean the electrolytic cell regularly, the influence of calcium and magnesium ion deposition on the performance of the electrolytic cell is reduced, the cooling unit can cool the electrolytic cell, and the reaction efficiency of the absorption unit and the current efficiency of the electrolytic cell are improved. Through the arrangement of the two units, the maintenance workload of workers on the electrolytic cell is reduced, and the operation is simplified.
(3) The automatic alarm is realized by the PLC control unit when the conductivity monitoring value is lower than 400ms/cm, the saline water with enough high concentration is effectively ensured to enter the electrolytic cell, the damage of an inner membrane of the electrolytic cell caused by too low saline water concentration is avoided, the current efficiency of the electrolytic cell during long-time operation is ensured, and the electrolytic cell is reduced.
(4) Due to the simplicity of operation and maintenance, the system is particularly suitable for water supply projects (particularly for water supply projects with limited operation managers and levels).
(5) The sodium hypochlorite solution prepared by the system can be used for other peripheral water supply projects and environmental disinfection.
Drawings
FIG. 1 is a schematic structural diagram of a full-automatic high-concentration sodium hypochlorite generation system according to the present invention;
FIG. 2 is a schematic structural diagram of a pure water unit of the full-automatic high-concentration sodium hypochlorite generation system of the present invention;
FIG. 3 is a schematic structural diagram of a salt dissolving unit of the full-automatic high-concentration sodium hypochlorite generation system of the present invention;
FIG. 4 is a schematic structural diagram of an electrolytic unit of the full-automatic high-concentration sodium hypochlorite generation system of the present invention;
FIG. 5 is a schematic structural diagram of an acid washing unit of the full-automatic high-concentration sodium hypochlorite generation system of the present invention;
FIG. 6 is a schematic view of the structure of the absorption unit of the full-automatic high concentration sodium hypochlorite generation system of the present invention;
FIG. 7 is a schematic structural diagram of an alkali dissolving unit of the full-automatic high-concentration sodium hypochlorite generation system of the present invention;
FIG. 8 is a schematic structural diagram of a feeding unit of the full-automatic high-concentration sodium hypochlorite generation system.
Reference numbers in the figures:
1-a pure water unit; 11-a pure water tank; 12-a valve; 13-a pure water pump;
2-a salt dissolving unit; 21-salt dissolving tank; 22-refined brine tank; 23-a weak brine tank; 231-a fan; 24-saline adding water pump; 25-a first filter; 26-a second filter; 27-a conductivity meter; 28-back flushing pipeline; 29-weak brine circulating pump;
3-an electrolysis unit; 31-hydrogen water seal; a 32-hydrogen blower; 33-a hydrogen separator; 34-an electrolytic cell; 35-a dechlorination tower; 36-chlorine blower; 37-pure water supplement pump; 38-brine circulating pump; 39-alkali liquor circulating pump;
4-an acid washing unit; 41-dilute hydrochloric acid tank; 42-dilute hydrochloric acid metering pump; 43-acid washing pump; 44-acid addition tube;
5-a soda-dissolving unit; 51-a third filter; 52-alkali storage tank; 53-lye pump;
6-a cooling unit;
7-an absorption unit; 71-a first absorption column; 72-a second absorption column; 73-a sodium hypochlorite storage tank; 74-first sodium chlorate absorption pump; 75-a second sodium chlorate absorption pump; 76-sodium hypochlorite discharge pump;
8-adding unit; 81-sodium hypochlorite storage tank; 82-dosing pump.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
Referring to fig. 1, the embodiment provides a full-automatic high-concentration sodium hypochlorite generating system, which includes a pure water unit 1, a salt dissolving unit 2, an electrolysis unit 3, an acid washing unit 4, an alkali dissolving unit 5, a cooling unit 6, an absorption unit 7 and an adding unit 8, wherein the pure water unit 1 is connected with the salt dissolving unit 2, the electrolysis unit 3, the acid washing unit 4 and the alkali dissolving unit 5, the electrolysis unit 3 is connected with the salt dissolving unit 2, the acid washing unit 4, the alkali dissolving unit 5, the cooling unit 6 and the absorption unit 7, and the absorption unit 7 is connected with the cooling unit 6;
the pure water unit 1, the salt dissolving unit 2, the electrolysis unit 3, the acid washing unit 4, the alkali dissolving unit 5, the cooling unit 6, the absorption unit 7 and the adding unit 8 are controlled by the PLC control unit to automatically execute the actions of water supplementing, salt dissolving, flushing, acid washing, circulating, electrolyzing and discharging.
Through this full-automatic high concentration sodium hypochlorite generation system, can realize full-automatic production sodium hypochlorite solution under PLC's control.
Referring to fig. 2, the pure water unit 1 comprises a pure water tank 11, an inlet of the pure water tank 11 is provided with a valve 12, and an outlet of the pure water tank 11 is connected with the salt dissolving unit 2, the acid washing unit 4 and the alkali dissolving unit 5 through a pure water pump 13;
the PLC control unit is used for controlling the valve 12 to be opened to supplement water to the pure water tank 11 when the water level of the pure water tank 11 is lower than the middle position, and controlling the valve 12 to be closed to stop supplementing water to the pure water tank 11 when the water level of the pure water tank 11 is higher than the high position;
the PLC control unit is also used for controlling the pure water pump 13 to stop supplying water to the salt dissolving unit 2, the acid washing unit 4 and the alkali dissolving unit 5 when the water level of the pure water tank 11 is lower than the low level;
the PLC control unit is also used for stopping electrolysis when the electrolysis unit 3 is short of water.
Referring to fig. 3, the salt dissolving unit 2 includes a salt dissolving tank 21, a refined brine tank 22, and a fresh brine tank 23; the inlet of the salt dissolving tank 21 is connected with the pure water unit 1, and the outlet is connected with the refined salt water tank 22; the refined brine tank 22 is connected with the electrolysis unit 3 through a brine adding pump 24 and a first filter 25 and a second filter 26 which are connected in parallel, and an inlet of the electrolysis unit 3 is provided with a conductivity meter 27; the filter is connected with the pure water unit 1 through a back washing pipeline 28, and the back washing pipeline 28 is provided with a back washing valve; the dilute brine tank 23 is connected with the dissolved salt tank 21 through a dilute brine circulating pump 29; the weak brine tank 23 is connected to the absorption unit 7; the fresh brine tank 23 is connected with a fan 231;
the PLC control unit is also used for controlling the electrolysis unit 3 to stop electrolysis when the dilute brine tank 23 is full;
the PLC control unit is also used for controlling the back washing pipeline 28 to carry out back washing on the first filter 25 or the second filter 26 and setting the back washing time of the filters;
the PLC control unit is also configured to perform a switching operation between the first filter 25 and the second filter 26;
the PLC control unit is also used for alarming when the conductivity monitoring value of the conductivity meter 27 is lower than 400 ms/cm.
Referring to fig. 4, the electrolysis unit 3 comprises a hydrogen water seal 31, a hydrogen separator 33, an electrolysis tank 34 and a dechlorination tower 35, wherein the hydrogen water seal 31 is connected with the hydrogen separator 33, the hydrogen separator 33 is connected with the electrolysis tank 34, and the electrolysis tank 33 is connected with the dechlorination tower 35; the hydrogen water seal 31 is connected with a hydrogen fan 32; the hydrogen separator 33 is connected with a pure water supplement pump 37; the electrolytic bath 34 is connected with a brine circulating pump 38 and an alkali liquor circulating pump 39; the chlorine removing tower 35 is connected with a chlorine fan 36;
the PLC control unit is also used for executing the circulating electrolysis action when the liquid level of the hydrogen water seal 31 is at a high level, the liquid level of the hydrogen separator 33 is at a high level and the liquid level of the absorption unit 7 is at a high level.
Referring to fig. 5, the acid washing unit 4 includes a dilute hydrochloric acid tank 41, the dilute hydrochloric acid tank 41 is connected to the pure water unit 1 and the alkali dissolving unit 5, and the dilute hydrochloric acid tank 41 is connected to the electrolysis unit 3 through a dilute hydrochloric acid metering pump 42 and an acid washing pump 43; the acid washing pump 43 is connected with an acid adding pipe 44;
the PLC control unit is also used for automatically carrying out water replenishing operation after the dilute hydrochloric acid tank 41 is emptied, and then carrying out acid adding operation.
Referring to fig. 6, the absorption unit 7 comprises a first absorption tower 71, a second absorption tower 72, and a sodium hypochlorite storage tank 73, wherein the first absorption tower 71 is connected with the second absorption tower 72, and the first absorption tower 71 is connected with the cooling unit 6 through a first sodium chlorate absorption pump 74; the first absorption tower 71 is connected with a sodium hypochlorite storage tank 73 through a sodium hypochlorite discharge pump 76; the second absorption tower 72 is connected with the dilute brine tank 23, the dechlorination tower 35 and the sodium hypochlorite storage tank 73; the second absorption tower 72 is connected with the cooling unit 6 through a second sodium chlorate absorption pump 75;
the PLC control unit is also used for executing sodium hypochlorite circulating absorption actions of the first absorption tower 71 and the second absorption tower 72.
Referring to fig. 7, the alkali dissolving unit 5 comprises a third filter 51 and an alkali storage tank 52, an inlet of the alkali storage tank 52 is connected with the pure water unit 1, and an inlet of the alkali storage tank 52 is further connected with an alkali liquor inlet pipe through the third filter 51; the outlet of the alkali storage tank 52 is connected with the electrolysis unit 3 and the absorption unit 7 through an alkali liquid pump 53;
the PLC control unit is also used for controlling the lye pump 53 to automatically add alkali to the electrolysis unit 3 and the absorption unit 7 before electrolysis.
Referring to fig. 8, the adding unit 8 includes a sodium hypochlorite storage tank 81 and an adding pump 82 connected to the sodium hypochlorite storage tank 81;
the PLC control unit is also used for controlling the adding pump 82 to execute sodium hypochlorite adding action.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (1)
1. A full-automatic high-concentration sodium hypochlorite generation system is characterized by comprising a pure water unit, a salt dissolving unit, an electrolysis unit, an acid washing unit, an alkali dissolving unit, a cooling unit, an absorption unit and an adding unit, wherein the pure water unit is connected with the salt dissolving unit, the electrolysis unit, the acid washing unit and the alkali dissolving unit, the electrolysis unit is connected with the salt dissolving unit, the acid washing unit, the alkali dissolving unit, the cooling unit and the absorption unit, and the absorption unit is connected with the cooling unit;
the pure water unit, the salt dissolving unit, the electrolysis unit, the acid washing unit, the alkali dissolving unit, the cooling unit, the absorption unit and the adding unit are controlled by the PLC control unit to automatically execute the actions of water supplementing, salt dissolving, flushing, acid washing, circulating, electrolyzing and discharging;
the pure water unit comprises a pure water tank, a valve is arranged at the inlet of the pure water tank, and the outlet of the pure water tank is connected with the salt dissolving unit, the acid washing unit and the alkali dissolving unit through a pure water pump;
the PLC control unit is used for controlling the valve to be opened to supply water to the pure water tank when the water level of the pure water tank is lower than the middle position, and controlling the valve to be closed to stop supplying water to the pure water tank when the water level of the pure water tank is higher than the high position;
the PLC control unit is also used for controlling the pure water pump to stop supplying water to the salt dissolving unit, the acid washing unit and the alkali dissolving unit when the water level of the pure water tank is lower than a low level;
the PLC control unit is also used for stopping electrolysis when the electrolysis unit is lack of water;
the salt dissolving unit comprises a salt dissolving tank, a refined salt water tank and a fresh salt water tank; the inlet of the salt dissolving tank is connected with the pure water unit, and the outlet of the salt dissolving tank is connected with the refined salt water tank; the refined brine tank is connected with the electrolysis unit through a brine pump, a first filter and a second filter which are connected in parallel, and a conductivity meter is arranged at an inlet of the electrolysis unit; the filter is connected with the pure water unit through a back washing pipeline, and the back washing pipeline is provided with a back washing valve; the outlet of the dilute brine tank is connected with the inlet of the salt dissolving tank through a dilute brine circulating pump; the weak brine tank is connected with the absorption unit; the fresh salt water tank is connected with a fan;
the PLC control unit is also used for controlling the electrolysis unit to stop electrolysis when the dilute brine tank is full;
the PLC control unit is also used for controlling the back washing pipeline to carry out back washing on the first filter or the second filter and setting the back washing time of the filters;
the PLC control unit is also used for executing switching action between the first filter and the second filter;
the PLC control unit is also used for giving an alarm when the conductivity monitoring value of the conductivity meter is lower than 400 ms/cm;
the electrolysis unit comprises a hydrogen water seal, a hydrogen separator, an electrolysis bath and a dechlorination tower, wherein the hydrogen water seal is connected with the hydrogen separator, the hydrogen separator is connected with the electrolysis bath, and the electrolysis bath is connected with the dechlorination tower; the hydrogen water seal is connected with a hydrogen fan; the hydrogen separator is connected with a pure water supplement pump; the electrolytic bath is connected with a brine circulating pump and an alkali liquor circulating pump; the chlorine removal tower is connected with a chlorine fan;
the PLC control unit is also used for executing circulating electrolysis when the hydrogen water seal liquid level is at a high level, the liquid level of the hydrogen separator is at a high level, and the liquid level of the absorption unit is at a high level;
the acid washing unit comprises a dilute hydrochloric acid tank, the dilute hydrochloric acid tank is connected with the pure water unit and the alkali dissolving unit, and the dilute hydrochloric acid tank is connected with the electrolysis unit through a dilute hydrochloric acid metering pump and an acid washing pump; the acid washing pump is connected with an acid adding pipe;
the PLC control unit is also used for automatically performing water supplementing operation after the dilute hydrochloric acid tank is emptied, and then performing acid adding operation;
the absorption unit comprises a first absorption tower, a second absorption tower and a sodium hypochlorite storage tank, the first absorption tower is connected with the second absorption tower, and the first absorption tower is connected with the cooling unit through a first sodium hypochlorite absorption pump; the first absorption tower is connected with the sodium hypochlorite storage tank through a sodium hypochlorite discharge pump; the second absorption tower is connected with the dilute brine tank, the dechlorination tower and the sodium hypochlorite storage tank; the second absorption tower is connected with the cooling unit through a second sodium hypochlorite absorption pump;
the PLC control unit is also used for executing sodium hypochlorite circulating absorption actions of the first absorption tower and the second absorption tower;
the alkali dissolving unit comprises a third filter and an alkali storage tank, an inlet of the alkali storage tank is connected with the pure water unit, and an inlet of the alkali storage tank is also connected with an alkali liquor inlet pipe through the third filter; the outlet of the alkali storage tank is connected with the electrolysis unit and the absorption unit through an alkali liquid pump;
the PLC control unit is also used for controlling the lye pump to automatically add alkali to the electrolysis unit and the absorption unit before electrolysis;
the adding unit comprises a sodium hypochlorite storage tank and an adding pump connected with the sodium hypochlorite storage tank;
and the PLC control unit is also used for controlling the adding pump to execute sodium hypochlorite adding action.
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| CN113046786A (en) * | 2021-03-09 | 2021-06-29 | 上海豚湾环保设备科技有限公司 | Sodium hypochlorite desulfurization sterilization system |
| CN115488090A (en) * | 2022-09-20 | 2022-12-20 | 大唐华银电力股份有限公司金竹山火力发电分公司 | Cleaning device and cleaning method for hydrogen production electrolytic cell |
| CN117248223B (en) * | 2023-11-17 | 2024-01-30 | 广州市豫泉净水材料有限公司 | Sodium hypochlorite generator and water purifying method |
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