Patent title
Electrochemical device producing disinfection liquid
Content (ozone, active chlorine, hydrogen peroxide)
A- Field of the invention
Electrochemical device producing fully complex disinfection liquid solution content (ozone, active chlorine, hydrogen peroxide) in liquid form, The solution can by generated by passing the original water through the electrolysis cell that content the suitable metal electrode after adding the salt solution (sodium chloride - NaCL) to raw water, a DC voltage is applied between the electrodes, leading to the electrolysis of the water. The complete solution production liquid of the device can be storage in collect tank to be ready to use, the generated disinfection solution can be used for many fields that they need sterilization instead of using any other chemical production.
• drinking water
• Wastewater
• Swimming pool , spa and tourism activities
• Fish animal farms
• Industrial activities
• Food industrial factory
• Hospital , pharmacy
• All other section need to be sterilized
B- The previous state
Electrochemical water disinfection is a rarely used but convenient and highly efficient way to produce germ-free water. The technique works without the addition of chemical compounds to the water to be treated, but is nevertheless based on the biotical action of various chemical Substances
Electrochemical water disinfection can be defined as the eradication of microorganisms by using an electric current passed through the water under treatment by means of suitable electrodes. At the phase boundary between the electrodes and the water, the electric current leads to the electrochemical production of disinfecting species from the water itself, (For example, ozone), or from species dissolved in the water (for example, chloride is oxidized to free chlorine).
Attempts to clean or disinfect water by direct electrolysis had been reported as early as the nineteenth century the electrochemical preparation of germ-free water. Since the end of the nineteenth century there have been frequent attempts to use electrochemical disinfection. Until recently none have been successful, at least not for long-term practical use. Different terms are or have been in use to describe this type of water treatment process or the water produced by this process, such as 'electrolytic disinfection' 'electrochemical disinfection', 'anodic oxidation', 'functional water' and 'electrochemically activated water' among others.
There are three reasons why electrochemical water disinfection has arrived at technical maturity only recently, rather than earlier in the (possibly) 2000 years since its discovery: (1) Sufficiently stable and efficient electrode materials for electrochemical water disinfection have been developed and optimized only in the last forty years. These are
titanium electrodes with mixed oxide coatings based on iridium and/or ruthenium oxide, and doped diamond electrodes.
(2) The functional interrelationships between chloride concentration in the water, current, current density, electrode material, water quality, electrochemical production of free chlorine and disinfecting action have been investigated in detail only recently.
(3) Development work on electrochemical water disinfection has often been undertaken by amateurs in both electrochemistry and water chemistry, and this remains somewhat true today. Only a few electrochemists have been interested in this topic, mostly only for a short period in their career. This has resulted in mistakes in device dimensioning and in unscientific explanations of the mechanism of the process.
C- Technical description for the invention in detail
The main purpose of the system is to produce fully complex liquid solution content the main effective disinfection item as bellow:
1- Ozone ( 03) in liquid form
2- Activate chlorine (CLO)
3- Hydrogen peroxide ( H202)
The solution can by generated by passing the original water through the electrolysis cell that content suitable metal electrode after adding the salt (sodium chloride - NaCL) to water, a DC voltage is applied between the electrodes, leading to the electrolysis of the water. After some chemical equations that can be done between electric and water (H20) we can produce the above main items.
To produce one liter of the disinfection solution we need 3-5 gram of slat and 4-5 watt, the system is able with various size and capacity starting from 10 Liter / Hour up to 1200 Liter/Hour for one unit
System parts
1- Water tank
2- Salt tank
3- Product tank
4- Acid tank
5- Feed pump
6- Control valve
7- Electrolysis Cell
8- Electric panel
9- Control unit PLC + HMI
Detail description of the system parts
- Water tank (diagram -PI-SY) part-1
This tank content the original water to be the main source for the water needed in the system, it's selected with suitable capacity according to the system capacity, this tank provide with mechanical level float to refill the tank with the original water when the level decreased, it is provide with low level sensor (diagram -PI-SY) part-Al, connected to control panel of the system
- Salt tank(diagram -PI-SY) part-10
This tank content the dilution water and salt to be the source of the chloride needed in the system, it's selected with suitable capacity, this tank provide with mechanical level float and electric valve to refill the tank with the original water when the level
decreased. It is provide with low level sensor (diagram -PI-SY) part-A2 connected to control panel of the system, salt is added by manual when the salt concentration is low- Product tank(diagram -PI-SY) part-26
The disinfection solution product is collects in this tank to be ready to dose in the water under treat or to be use for any other disinfection application; this tank should be made from anti corrosive material with suitable capacity, provided with level sensor (diagram -PI-SY) part-A3 to stop the system when the tank is full
- Acid tank(diagram -PI-SY) part-2
We used the Acid (HCL) to do the frequent washing of the system parts to prevent scaling problem in the electric cell or other part that may be able to be in case of high concentrate of the total hardness in the original water that may can reduce the affectivity of the production, this tank should be made from anti corrosive material with suitable capacity
- Feed pump(diagram -PI-SY) part-5
The system provided with special pump that can give suitable flow and pressure according to the system capacity, this pump drag the original water from the water tank at the same time this pump is used for water and acid washing
- Dosing pump(diagram -PI-SY) part-11
The dosing pump used to dose the salt solution with the original water to increase chloride ion in the water, a suitable adjustment dose is equipped according to the system capacity, and this pump is working with full automatic control via the control unit PLC
- Control valve
The system content the below valves
· 2 way Electric valve for Acid drag (diagram -PI-SY) part-4
• 2 way Electric valve for product (diagram -PI-SY) part-18
• 2 way Electric valve for drain (diagram -PI-SY) part-19
• 3 way Electric valve for system inlet (diagram -PI-SY) part- 12
• 2 way Electric valve for discharge (diagram -PI-SY) part-14
All valves are working under PLC control.
- Electrolysis cell (diagram -PI-CELL)
The cell content the metal electrode that can issue the chemical equation to produce the disinfection solution, the cell is provided with suitable voltage and current
• Bottom inlet side (diagram -PI-CELL) part- 21
· Upper inlet side (diagram -PI-CELL) part-22
• Manual discharge (diagram -PI-CELL) part-24
• Automatic discharge (diagram -PI-CELL) part -25
• Product outlet (diagram -PI-CELL) part-23
• Distributed pipe (diagram -PI-CELL) part-20
· Pole electrode (diagram -PI-CELL) part-15
• Plate electrode (diagram -PI-CELL) part- 16
• CPVC or Teflon cell body (diagram -PI-CELL) part -17
- Electric Board (diagram -PI-EC1221-B)
The electric board has all the electric components with all relay, contactor and other necessary protection device and the suitable power supply for all system parts
0- Control panel PLC + HMI (diagram -PI-EC1221-B)
All the system components are working under PLC control that has the source program to control and supervise these parts
The flexibility and high stability of the program give to the system the best production and perfect functionally working, the PLC is connected with HMI screen to display all the information needed in the system
System operation!
When the power connected, the PLC program startup and the display screen (HMI) will show all the information about system parts as in the figure -1
Through this window we can see all the system parts status and it show the operation sequence to start production, the product flow rate can be read online in this window, From this screen we can loge to other screen window, upon we push on the menu box new screen will be display as in figure-2
In this window we can see the following choices
There are two languages can be selected either English or Arabic with ability to add any other language
It can display the total production starting from the system startup §§ It can display the total operation hours at the system startup ff§§ It can display the total hour of
In case we need to start manual washing of the system
It can display the date of the system startup
It can display all alarm messages since system startup
When we push on the control box Total production new screen will appear as in figure-3 this window display total of disinfection solution produced by the system, it can be shown as four counters (m3, m3, m3, and liter)
When we push on the control box Total operation hour, new screen will appear as in figure-4, the operation hour will show how many years, day, hour and minute of working
Referring to figure -2
When we push on the control box Total production hour new screen will appear as in figure-4, the operation hour will show how many years, day, hour and minute this information give the exact working hours the system has production within the limit parameters
Referring to figure
When we push on the control box System washing new screen window will appear a35 in figure-6
Water washing is necessary to clean the electric cell from the particles that will formed during passing water through electrode under DC voltage, this operation is executed with downstream! up to down ) to allow particle go out from the drain washing valve. Acid washing is performed to prevent electrode scaling and all other parts that may can happened in case of high concentrate for total hardness of the raw water To start washing procedure we push on the control box (start), at this time the system will start washing by water for fixed period At the same time the system is provided with automatic washing program by water or acid that will done according to operation hours or by total production
Referring to figure -2
When we push on the control box Operation date, new screen window will appear as in figure-7
Referring to figure -2
When we push on the control box History register new screen window will appear as in figure-8 all alarm messages that happened in the system it can be displayed on this 15 screen, During system operation PLC program make online monitoring for all necessary parameters, in case of any wrong in the function, the system will stop and display a new sub screen to inform what alarm is there
This alarm activated when the original feed water is less than set point of the system parameter, this may be for some reason (water tank is empty, manual valve closed, or there is some obstacle on the water raw) the new screen will display the responsible massage as figure 9
• Low salt amount
This alarm activated when the salty water is less than set point of the system parameter, this may be for some reason (manual valve of the salt tank is closed, there is some obstacle on the raw, salty water dosing pump is stopped, no salt in the salt tank) the new screen will display the responsible massage as figure -10
• High Ampere
This alarm activated when the cell's Ampere is more than set point of the system parameter, this may be for some reason (high voltage of the cell, dosing pump adjusted with high dose) the new screen will display the responsible massage as figure -11
This alarm activated when the outlet pressure of the cell is more than adjusted value to protect the cell body of damage, this alarm can happen in case of outlet valve problem. New screen will display the responsible massage as figure -12
This alarm activated when the inlet pressure of the cell is more than adjusted value to protect the feed pump and stop it directly , this alarm can happen in case of inlet valve of the cell problem. New screen will display the responsible massage as figure -13
• Cell power failed
The cell's power has circuit breaker protection provided with limit set point to adjust the necessary current value, this alarm activated when the circuit breaker shut down the power if the limit ampere is over, new screen will display the responsible massage as figure -14
• High or low voltage
The cell's power has voltage measurement instrument provided with limit set point to adjust the necessary voltage value, this alarm activated when the voltage value is out of limit set point for high and low, new screen will display the responsible massage as figure-
This alarm activated when the water of the feed tank is low, new screen will display the responsible massage as figure -16
. Low level salt feed tank
This alarm activated when the salty water tank has low level, new screen will display the responsible massage as figure -17
When the product tank if full a new message will appear as figuer-18 20 Working principal
Feed pump start working to push the original water with suitable flow and pressure to the system via pre filter (diagram -PI-SY) part-7 then the 3way inlet valve to let the water go into the electrolysis cell from the bottom inlet side (diagram -PI-CELL) part-21 to allow water spread through distributor pipe (diagram -PI-SY) part-20, the water start go out from the output hole (diagram -Pl-cell) part-23, when the outlet water of the electrolysis cell reach to the adjusted set point that can be done by the flow meter (diagram -PI-SY) part-13, whose provide with limit switch sensor to give start signal to the PLC, when this signal reach to the control panel, the PLC give start working signal to dosing pump (diagram -PI-SY) part-11 to dose the salt solution into the system, after 5 second the power supply of the cell start working to provide the electrolysis cell with suitable voltage, the power supply of the cell has soft start function to protect the system from electric shock. At this time the current pass through the electrode will start increasing slowly.
The system is providing with current measurement unit with tow limit set point for low and high, when the passing current through the electrode arrived to the limit set point, the current measurement unit gives signal to the PLC, when the PLC get this signal, the PLC will know the product solution has good quality for disinfect, at this time start signal for the 2 way Electric valve for product (diagram -PI-SY) part-18 to open, and 2 way Electric valve for drain (diagram -PI-SY) part-19 to close. A pulse counter (diagram -PI-SY) part-6 is providing to give pulse signal to the PLC to calculate on line flow rate and total production.
The system has automatic or manual washing and cleaning procedure, first washing is done using original raw water with downstream flow direction to discharge all the solid that can be generate into the electrolysis cell during operation, when the first washing begin, the feed pump start working to push original water into the system via 3way inlet valve that will turn on to let original water go into the electrolysis cell from the upper inlet side (diagram -PI- CELL) part-22, and 2 way Electric valve for discharge (diagram -PI-SY) part-14 will open, after 1 minutes, second washing will start, this washing is done with upstream flow direction by Acid to remove scaling formation, the acidic solution is provided to the system by the Acid tank (diagram -PI-SY) part-2 when the second washing begin the feed pump will start working and 2 way Electric valve for Acid drag (diagram -PI-SY) part-4 will open to allow the acid solution goes into the system, 3way inlet valve that will turn to let the acid solution go into the electrolysis cell from the bottom inlet side (diagram -PI-CELL) part-21, during all the time of the system washing the 2 way Electric valve for product (diagram -PI-SY) part-18 will close and 2 way Electric valve for drain (diagram -PI-SY) part-19 will open.
The product solution has very strong activity to eradication of microorganisms without any other chemical needed to add and maybe able to be dangerous for the human healthy or for ambience environment
System advantage
Avoid the risk inherent in the transportation, handling, storing
Reducing the cost of disinfection with other method more than 90%
Easy to install and simple to operate
Full automatic control
No spare part are need to replace
Disinfection product liquid advantage
Safety products solution
Activity to eradication of all kind of microorganisms and virus
Strong activity, complex disinfection solution(03-H2o2-CLO)
Low contact time (sec )
The disinfection item produced from water it self
Environmentally Friendly
Less corrosive than chlorine at use rate
Stable product
Colorless liquid with slight chlorine smell
It can be effect with a different water kind
Removing of color and odor of the water
No change the PH of the water
Performs over a broad PH rang (4-10)
No skin damage
No smell of chlorine
No produce carcinogenic substances
No use dangerous and harmful chemicals ( only salt is used)
No irritation of mucosa
The percentage dose for each application
For drinking water the dose can be started from lmL/L to 3mL/L
For swimming pool from 3 to 6mL/L
For wastewater can be started from 5 to 15mL/L or can be calculate according to water analysis
We can use the disinfection solution as it is without any dilution to disinfect all the equipment, production line and every thinks need to be clear from the bacteria
The disinfection product has full safety for human health Activated and efficient biocide
Capable of controlling and reducing all type of micro-organisms including
• Bacteria
• Fungi
• Vims
• Protozoa
Algae
Drawing and block diagram
System frame design
All PLC parts connection (PI-EC-1221-A)
Electric parts connection (PI -EC-1221-B)
Steel frame diagram for the control unit (PI-DRW-11) Tank frame and design (PI-DRW-T4)
Cell diagram and design with different size (PI-CELL-1-2) System parts (PI-SY)
Electrolysis cell (PI-CELL)
System Water washing (PI-WW)
System Acid Washing (PI-AW)