PIROBLOC

MODULATING BURNERS

Although, it is certain that at present many equipment of new acquisition incorporates this type of burners. In fact, Pirobloc always implements them without additional cost in all gas equipment. They still even exist many facilities with burners of two steps or, for low powers, at one step.

Each process of manufacture is different, but the habitual fact is that the heat consumer does not even require all the power at any moment. Also, in certain cases, the consumption is null or low. In those cases of variable processes and, still considering an optimal regulation, the burner will go out. Opposite to the appearances, this action does not contribute to any economic saving. From a point of view of energetics efficiency, when the burner starts again, it will take place the relative "blowing" of the combustion chamber, producing an unnecessary cooling of it.

With a correct sizing and the supplying of modulating burners, when the demand of power is low, the modulation of the burner complies consequently with that low demand, avoiding complete unemployment and the cooling of the combustion chamber for, immediately afterwards, returning to warm up it. That is to say, useless fuel consumption.

See you in our next appointment.

Fuel Saving

¿DID YOU KNOW…?

That in a heating process with thermal fluid fuel consumption is between 20 and 25% lower than with steam.

Of course you did. Despite and maybe because not everybody did, I’m not get bored to repeat. Nowadays energy and industry are focused in the climatic change, fuel fossil exhaustion and in its consequent price increase. Then, to choose the suitable technological option to heat up a process becomes the key not just for our planet but also for our pocket.

Still there are many companies and process burning more than 20% strictly needed. The global efficiency of one indirect heating installation is 65 - 70%. That is to say more than 30% of the energy is get lost. Third part of it is getting lost by the chimney. Exhaust recovery has to be develop notably in the coming years. But this is not the topic of today. The worst is the other 20% of the whole burnt fuel. Condensates and steam traps are in charge of it.

The good new is that this same process heated up by hot oil will have a global efficiency of 90%. The other 10% is getting lost again by the stack. But that’s all. Is not phase change, nor condensates recovery, nor steam traps. It’s just a closed circuit. Read More!

The heat insulation in a thermal oil installation

The technology of the heating through thermal oil has like basic characteristics the possibility of working at high temperatures (180-280ºC), not generating high pressures as it happens in steam installations.

This is due to the fact that there is not a change of phase from its liquid form and to the fact to work in a closed circuit.

But, today we want to focus ourselves in the type of specific heat insulation recommended to isolate the thermal fluid facilities, existing in the market multiple products for it, between which the mineral wools (rock wool), the plastic foams, products with cellulose, etc., all of them with the basic characteristic to avoid losses of heat from the heating fluid, to guarantee the yield and good operation of the installation, avoiding accidents and expensive energy losses, avoiding a greater environmental contamination and global heating.

In our case, it is important to consider the working temperature of the process and the diameter of the installation piping, recommending the following:
We will use casting dies in pipes of small and medium diameter, due to the concentric disposition of fibers. Therefore, the thickness of the casting dies would not have to be inferior to 60 mm for the pipe until DN-65, being of 80 mm for the pipe of greater diameter. The use of the rock wool is recommended in higher diameters of the previously mentioned ones, and for working temperatures over 200ºC.

In order to extend the previous information, you can consult the norm UNE 9310 that applies in Spain and that informs into the minimum thicknesses of isolation according to the diameters and temperatures of work.

Please, remember that it is not necessary to isolate the expansion and collecting tanks in the thermal oil facilities.
Please, also remember that the insulating wools use noninflammable materials and of a minimum calorific power, being against the propagation of fires. If we have high working temperatures or increases of temperature in an installation, will have to choose high density (HD) rock wools for our insulation.

To finish, as habitual norm and with the object of calculations, it is used the following reference: the temperature of wall of a heat consumer machine, of a thermal oil heater, of the piping, etc., does not have to surpass in 30ºC the room temperature.
See you next time. Read More!

Thermal fluid heater: the best location

In the present article we would like to give some advices to consider at the moment of the constitution, possible construction and start up of a new production line or a new plant. These advices can result in a more efficient and rational way to raise the positioning of your production sources, such as the thermal fluid heater:

In the case of a new industrial plant in which the roof does not still exist and the heater has important dimensions, people usually takes advantage of the nonexistence roof to enter the heater. Please, consider to make an opening in the plant of the dimensions of the boiler, for possible future repairs or even for the moment in which the heater will be dismantled and in order to avoid to disassemble part of the tile roof in the future.
At the time of the thermal oil heater definitive positioning, it can be located near the consumer and/or of the working area of the staff in charge of its maintenance and monitoring. This action will revert in an economic saving as far as materials of installation and time used by that staff in the control of the boiler.
You must remember that we have boilers with vertical and horizontal design to save any difficulty of space you can have.
In reference to the fuel to be used in the burner of the boiler, you should remember that:

In case of using natural gas, you should avoid the placement of the heater in cellars. In this way, you would not have to make a forced ventilation installation, necessary to facilitate the combustion of the gas burner if placed in such places.
In case of use light oil or heavy fuel oil, you will need a storage tank for these fuels, reason why you can save the installation of an intermediate vessel if you install the heater the closest possible of the main fuel storage tank.

In reference to the necessary elements for the good operation of a thermal oil circuit, you should take into account one expansion and one collecting tanks of certain dimensions.
To finish and speaking about the chimney, remember that it must exceed minimum 1 meter over the surrounding buildings within a radius of 10 meters with respect to the axis of the chimney.

We are at your disposal to answer to your questions and commentaries. Read More!

The most interesting published subjects

Three years ago, we published the first post in this blog. After this lapsed time, we have stated that some subjects have been more visited and interesting than others and for that reason, following you can find them:

The day to day and just the short time at disposition, they do that our readers receive by RSS the new publications on the blog, but we receive very little commentaries.

Thanks to your commentaries, we could know what information is more interesting to you than other of each subject, and thus we can develop it or answer to you.

We invite to you to comment and in any case, we promise to always answer.

Good year to all! Read More!