Hi to all, I need a help to resolve how to auto washing the water tank with the wet cell.

After 10-15 days I have always to clean the tank and the wet cell, because the wayer with electorlise become very dark and I lose the HHO gas performance. Now I have to open the wet cell manual valve for exit the all dirty water, refill with clean water and again rewashing and refill again with pure water, then the generator is ready to produce hho gas again.

I like to make this 3 step procedure controoled automatically with the Logo!

This are the washing step that I like to do with the Logo!

1) On the water tank I have the AI4 KOH sensor, where is detecting the water conductivity. mormally must be around 300ms, but when the water is not clean, will increase the value, over 600/900ms. So, when for example the AI4 detect the value of 800ms, will stopping the HHO gas production, by switching OFF the I13 HHO switch and automatically the Q5 RST power supply turn OFF.

2) Now start the first washing cycle: I have to open the Q18 Cell wash exit valve, the water start to exit, BUT I dont know when the all 150 Liters dirty water are out, bceause the WET Cell is located under the water tank.

3) I will open the Q15 Air Tank Valve, controlled by the Pressure sensor AI1, set to max 200 mBar pressure and turn OFF the valve with continue cycle pumping air. In this way I pump air on tank and help to exit the all water till the Wet Cell. ( normally nned to pump air to max 2-3 second)

4) When the Q15 Air Tank valve work for more than 10 seconds, it mean that the all water from the tank and Wet Cell is out and ready to refill normally water for the washing cycle.

5) Now I have to close the Q18 Cell exit valve and open the Q11 Wash water tank valve, to load all new clean water. I have also to open the Q17 Gas OUT Tank waste to help to exit the air when loading the clean water, or the tank go in pressure.

6) when loading clean water I have to run the Q2 HHO Pump for start circulating the water on the system and cleaning the whole system. It will load around 150 liters water and need around 10 minute, in this time the pump have washing complete the tank and wet cell.

7) when the I10 High Tank Level sensor detect the full tank level water, have to stop to loading water and restart again to waste the dirty water.

8) procedure again as top to purge exit out the all dirty water with pumping air untill the  Air Valve is decetded 10 seconds open, mean that all water is exit from the wet cell.

9) now finally the washing cycle is complete, closing the Q18 valve and start to loadind PURE water.

10) we have now to open the Q7 Pure Water Tank valve and the Q17 GAS OUT Tanl waste valve to purge out the air when loading the Pure water and also running the Q2 HHO Pump for the system circulation.

11) when the I10 High Tank Level sesnor detect the tank full, the washing procedure stopping.

12) Now we have again to turn ON the I3 HHO switch and the hho generator return to produce gas again.

I have attached one schematic example with my all I/O available, but I'm not able to assembly this 3 washing procedure blocks:

1= exit the all dirty water, 2= load clean water, washing and purge out again, 3= load again PURE water and make the generator restart producing gas again.

Someone is able to help me to configure all the blocks?

Thanks again!!

Domenik

Hello Domenik,

For this application you need solenoid valves. And so, analog sensors with output  0 to 10 Vcc, 0 to 20 mA or 4 to 20 mA.

If you already have, could you please inform the lower and upper limits from each one and corresponding value in mA or Vcc?

To the condutivimeter, for example:  

Lower limit = 100 mS = 0 Vcc

Upper limit = 2000 mS = 10 Vcc

These informations is necessary to configure analog blocks.

Regards,

Hello Dinos, thanks for the reply.

The all solenoid valves and motorized ball valve are installed, this hho generator is working 24 hours at day in one Biomass engine system.

The conductivity sensor is also installed, is used for loading the KOH liquid for the electrolisi, range is from 0 to 1000ms= 0-10V, for that is easy to set, just put the value point to 800 and have to start the washing cycle.

Pressure sensor is  -1 to 2 Bar, on my block you can see that I have set to -1000 to +2000. value set to 200 mean 0.2 bar= 200 mBar.

Anyway then dont worry for the fine pitch value, because then I have to test in realmode with the generator and fix the values where I need.

Thanks again

Here you can see the video how is working the HHO generator

https://youtu.be/usrdmI_2Ez0

Hello Domenik,

I saw the vídeo - fantastic!

Motorized balls valves - Nice.

Conductivity sensor - OK

What about your pressure sensor? Does it have a transducer (0 to 10 Vcc, for example)?

Regards

Hi Dinos

The pressure sensor is also 0-10V, so just set the air pressure to 200 ( 0.2 Bar)

thanks also for enjoy my video:))

Here you can see how is made inside, impressive....:)

https://youtu.be/6CbQy-yk1WY

And here the Hydrogen Flame test:

https://youtu.be/UcJv7yOKdQE

well, I have to say that also Siemens Logo! is fantastic, I have used the all possible chanels in one system, just watch the video and you see the all Logo modules connected:))

Hello Domenik

The pressure sensor is -1 to 2 bar. Its transducer is 0 to 10 Vcc.

-1 bar can means 0 Vcc and 2 bar means  10 Vcc?

Just check this point.

Yes, correct, range is -1 bar=0 volt, 2 bar=10 volt

regards

Hello Domenik,

Give me some minutes, please.

Regards.

Hello Domenik,

The pressure transducer is fine.

For -1 bar we have zero Vcc. For 2 bar we have 10 Vcc.

The software assumes zero Vcc as number zero and 10 Vcc as number 1000.

So, -1 bar = zero Vcc = number zero and 2 bar = 10 Vcc = number 1000.

You can enter directly in the analog dfferential trigger with the analog transducer input, using measuring range zero and 1000. For Delta we have to do simple relations:

Number 1000 = 2 - (-1) bar, so 1000 = 3 bar ou 3000 mbar

If we want 200 mbar the Delta must be number 67. Supposing differential of 10% = 7.

Possibility for fine adjustment:

In the analog dfferential trigger aplly gain 10, measuring range zero and 10000, Delta 667 and differential as 67 (this is according your experience). 10% can be too low or too high.

Look attached and let me know.

Regards,

Hello Dinos

Your analog block B074 Wash air 1 can be fine, calculating the +/- 10% of the air pumping pressure.

The problem there is the delay block B091, is connected on wrong place. When the B076 enalbe the Q15 Air Tank Valve, start automatically the B091 delay for the next water load process and also the Q18 Cell Wash exit valve continue remain open, this mean to continue waste out the water.

The delay block B091 have to start ONLY IF the Q15 Air tank valve remain open for more 10 seconds. Right now at the first open air valve start also the water loading process.

As I said before, I have around 150 iters water on the tank+Cell, for exit all the water from the motorized valve Q18 normally need around 15-20 minute.

In this time the Q15 Air tank valve have to continue fast open/close for make 200 mBar pressure on tank ( I put 6 BAR air compressed) ONLY when is detect 10 second of open air valve ( mean water is all out from tank) have to start the second process to load new clean water but also to close the Q18 valve or I continue lost water.

On your demo is not complete of the 3th process to waste again the water and load the Pure water, Q7 valve and level tank I10, they are still cont connected, right?