Do-it-yourself oven for working out

It is always nice to use junk materials with benefit. And if it concerns fuel and heating, it is also very profitable. A striking example is waste oil heating furnaces. They can use any oil that can burn. Transmission, diesel, machine, confectionery, vegetable … Really any. There are no problems with fuel for such units. What they found, they poured. Moreover, a do-it-yourself furnace is also made from waste materials: an old gas or oxygen cylinder, pipe sections of different diameters or pieces of metal. 

The principle of operation of homemade stoves

If any used oil is simply set on fire, the smoke will be merciless and “smell” even more actively. Therefore, direct combustion is not used. First, volatile substances evaporate, then they are burned. This is the basic principle of design development. Therefore, in some embodiments, the furnace has two combustion chambers connected by a tube in which holes are made.

In the lower chamber, the fuel is heated and evaporated. Combustible vapors rise up. Passing through a pipe with holes, they mix with oxygen dissolved in the air. Already in the upper part of this pipe, the mixture ignites, and burns out in the second chamber. Moreover, the combustion of vapors occurs with the release of much more heat and less smoke. With the right technology, there is practically no smoke, as well as soot.

The structure of the waste oil furnace with an air supply pipe

The second way of separating “heavy” fuel (oil of any origin) into “flammable” components is more efficient, but also more difficult to implement. For efficient evaporation, a metal bowl is installed in the lower chamber. It heats up, the droplets of mining that fall on it instantly turn into volatile combustible vapors. In this case, the glow is obtained (in the correct mode) blue-white, as in the case of plasma combustion. From here came another name for this design – with a plasma bowl.

To achieve the greatest efficiency of fuel combustion, used oil must be fed into the lower chamber in very small portions. In some cases – drops, sometimes – a thin stream. That is why this technology is called drip feed.

Working principle of waste oil furnace with plasma bowl

These are the basic principles of the “operation” of home-made heating units. There are a very large number of their combinations and variations. A few of them are described below.

You can see an example of combustion in a plasma bowl in the video below. This is a Gecko mining furnace, it has a built-in water heater and can work as a heating boiler.

Advantages and disadvantages

The main and main plus is that used fuel and oils are used, which otherwise would have to be disposed of. If the technology is followed, the combustion is so complete that practically no harmful emissions into the atmosphere occur. Other advantages are no less significant:

  • simple construction;
  • high efficiency;
  • low cost of equipment and fuel;
  • works on any oils, organic, synthetic, vegetable origin;
  • the content of up to 10% of pollutants is allowed.

There are also serious drawbacks. And the main one is that if the technology is not followed, the combustion of fuel occurs incompletely. And its vapors get into the room, and this is very dangerous. Therefore, the main and main requirement: furnaces operating on waste oil are installed exclusively in rooms with a ventilation system.

For comparison: this is a waste oil boiler with an inflatable burner. The technology is different, as is the design (for more details, see the video at the end of the article)

There are more cons:

  • to ensure good draft, the chimney must be straight and high – at least 5 meters;
  • regular cleaning of the bowl and chimney is required – daily;
  • problematic ignition: you must first heat the bowl, then supply fuel;
  • hot water options are possible, but their independent design is a difficult task – you can’t greatly lower the temperature in the combustion zone, otherwise the whole process will fall apart (as an option, install a water jacket on the chimney, here it definitely won’t interfere with the decay of the fuel).

Due to such features, such units are rarely used for heating residential buildings. If they are installed, then in separate rooms and in a modified form.

Application area

In the basic version, a homemade waste oil stove heats the air. They are also called heat guns, heat generators or heaters. It is rarely used for heating residential premises in this form: the air dries out, oxygen from hot metal walls is burned out. But to maintain a normal temperature in industrial or technical premises, such units are very effective: they quickly raise the temperature. They can be seen at service stations, car washes, garages, production shops where there are no combustible materials, warehouses, greenhouses, etc.

Do-it-yourself furnaces for working out – the best option for a garage

Many options can be improved: they can install a coil for heating water or make a water jacket. Such equipment already belongs to the category of water heating and can be installed in a water heating system. Without automation, a mining furnace with a water circuit requires constant monitoring, but for summer cottages, farm buildings with livestock, etc. this is a great option.

How to make a waste oil stove

Today there are already more than a dozen different designs. They use different methods of extracting thermal energy, have a different structure.

Furnaces for burning mining from a pipe

It is easier to make an oven if the body is already ready. As such, you can use a gas or oxygen cylinder, a thick-walled barrel or pipe. The diagram below explains how to make a waste oil stove from a pipe.

The operation of this unit is based on evaporation in a plasma bowl. It can produce up to 15 kW of heat (on average, it can heat 150 square meters). Greater heat transfer due to any changes (the size of the furnace or an increase in the air supply) is impossible: the thermal regime will be violated and instead of more heat, more fumes will be obtained, and this is unsafe.

A furnace for working out from a pipe can be made with your own hands if you have welding skills

The build order is:

  1. We make a body.
    1. We take a thick-walled pipe with a diameter of 210 mm, a wall thickness of 10 mm. Height 780 mm.
    2. From sheet steel with a thickness of at least 5 mm, we cut out the bottom with a diameter of 219 mm and weld it on one side. This is the bottom.
    3. Legs are welded to the bottom (they can be made from bolts).
    4. A viewing window is made at a distance of 70 mm from the bottom. Through it, it will be possible to monitor combustion and heat the bowl at the “start”. Dimensions, respectively, make it convenient for you. The door itself is made from a cut piece of pipe, having welded a thin collar. But everything should be closed tightly, because an asbestos cord is laid around the perimeter of the door. You can use furnace casting, then the dimensions of the hole are cut out for it. You can fasten it with bolts directly to the body (an asbestos cord is required here too).
    5. On the opposite side of the body, stepping back from the top 7-10 cm, a pipe is welded to remove flue gases. Its diameter is 108 mm, wall thickness is 4 mm.
  2. We make a cover.
    1. A circle with a diameter of 5 mm is cut out of metal 228 mm thick.
    2. A collar is welded along the edge from a strip of metal 40 mm wide, the thickness of the metal is 3 mm.
    3. A hole with a diameter of 89 mm is cut out in the center of the cover, the second with a diameter of 18 mm is cut out from the side. The smaller hole serves as another viewing window, a cover is made on it, which is also used as a safety valve.
  3. We make a pipe for supplying air and fuel.
    1. We take a piece of pipe with a diameter of 89 mm, with a wall thickness of 3 mm, and a length of 760 mm.
    2. Stepping back from the edge of 50 mm around the circumference, drill 9 holes of 5 mm in diameter.
    3. 50 mm above these holes, two more rows of holes with a diameter of 4,2 mm are made, 8 pcs in each row.
    4. Having risen even higher by 50 mm, a fourth row of holes is made, 3 mm in diameter. There should be 9 of them.
    5. On the same side, cuts 1,6 mm thick and 30 mm high are cut along the edge of the grinder. Around the circumference of the pipe, they need to be made 9 pcs.
    6. From the other end of the pipe, stepping back 5-7 mm, cut out a hole with a diameter of 10 mm.
    7. Insert the fuel supply pipe into the cut hole. Its diameter is 10 mm, wall thickness is 1 mm. It ends at the same level with the air supply pipe. The length and angle of the bend depend on where the fuel container will be located.
    An example of a homemade stove from a pipe
  4. The finished air and fuel supply pipe is welded to the cover. It is set so that it does not reach the bottom of the case by 120 mm.
  5. We make a bowl for fuel
    1. Now a piece of 133 mm is cut off from a pipe with a diameter of 4 mm, with a wall thickness of 30 mm.
    2. We cut out a circle with a diameter of 2 mm from sheet steel 219 mm thick.
    3. Weld to a piece of pipe. It turned out a bowl where fuel is supplied.
  6. Assembly.
    1. A bowl is installed inside the body at a distance of 70 mm from the bottom. It can be observed (and kindled) from the lower inspection hatch.
    2.  Install the cover with the fuel / air supply device.
    3. A chimney is installed on the chimney pipe. Pipe with a diameter of 114 mm, a wall of 4 mm. Its height is at least 4 meters. The part that remains indoors may not be insulated; it is better to insulate it outside. Chimney – only vertically upwards, inclined sections are excluded.

After installing the oil tank, you can start testing. First, a little paper is placed in the bowl, a flammable liquid is poured, everything is set on fire. After the paper has almost burned through, the oil supply opens.

This drawing of a waste oil furnace is not in vain given with such an accurate indication of the materials. These are the parts you need to use. As a result of the operation of a home-made stove, with a consumption of 1-1,5 liters of fuel per hour, you can heat a room up to 150 “squares”.

Drawing of a furnace from a pipe or cylinder in video format

A furnace using waste oil from a cylinder (oxygen or gas) is presented by the author in the video. The design is similar to the one described above, but with original modifications (and it is a little simpler)

Do-it-yourself mini oven for working out

This home-made stove, with a small size and weight (10 kg), fuel consumption of about 0,5 lira per hour, produces 5-6 kW of heat. It is possible to melt it more strongly, but it is not necessary: ​​it can explode. The design is loved by motorists: the garage heats up quickly even in extreme cold, it consumes oil economically, and it is also compact. Therefore, it can be called “garage”.

The fuel tank of this small air gun is assembled from the bottom and top of a standard 50 liter gas bottle. It turns out a very reliable design (keep at least one circular seam from the cylinder – there is an o-ring that will give greater strength. You can make a tank from any other container of similar dimensions: 200-400 mm in diameter and about 350 mm high.

A small furnace is being worked out, it weighs about 10 kg, it is easy to make it with your own hands

In addition to the fuel tank, you need to make a pipe in which the fuel-air mixture is mixed. The wall thickness here is at least 4 mm. You can use a pipe of a suitable diameter. The cones are made from structural steel no thinner than 4 mm.

The dimensions of the waste oil furnace indicated on the drawing can be adjusted up or down, but only by 20 mm – no more. Especially carefully it is necessary to boil the seams in the places of funnels: here the fuel-air mixture lingers for a long time, which is why the temperature is considerable.

The length of the chimney pipe is no more than 3,5 meters. Otherwise, due to too good traction, the fuel will be pulled into the pipe, which will significantly increase consumption and reduce heat transfer.

The figure on the right shows a hot-water version of a homemade stove. Around the upper part of the afterburning zone, several turns of a steel tube are made through which water is passed. In order for the temperature of the gases not to drop much, the coil is closed with a heat-reflecting steel casing. Cold water is supplied from below, passing in a spiral, heats up and goes into the system.

Miracle oven in development

This option is very popular with summer residents and in garages. A convenient small stove, which is made with round or square burning zones. The design is so successful that there are even industrial options. For example, one of the enterprises sells it under the name “Ritsa”. The diagram shows all the required dimensions.

Waste oil furnace diagram with dimensions – all you need to make it yourself

A video report on how to assemble this oven will help you navigate the order of work.

The video below shows the variant with square containers, its filling and dimensions.

Factory Options

Waste oil furnaces are made not only by the artisanal method, they are also produced by the industry. And there are both imported and Russian ones. But the type of construction they have is different.

European or American mining boilers belong to the category of liquid fuel furnaces. They use the principle of pressurization: oil is sprayed into small droplets, combined with an air stream. And the fuel-air mixture is already ignited. Imported factory stoves use the same principle, only a special burner is installed in which the fuel is heated before spraying.

To appreciate the difference in technology and structure, watch the following video. The device is completely different.

In most Russian-made furnaces, the first principle is used – there is a hot (plasma) bowl in which liquid fuel turns into gaseous, mixes with air and burns. According to this principle, the following units are built:

  • Gecko. Produced in Vladivostok. They make units with a capacity of 15, 30, 50 and 100 kW / h. These are hot water boilers that are built into the water heating system. Prices from 70 rubles for a 000 kW boiler.
    Boilers at the development of Russian production “Gecko”
  • Typhoon. They are produced by Belamos. These are heat generators: they heat the air. There are two options – Typhoon TM 15 and TGM 300, they give out 20-30 kW / h (price: 45 rubles and 000 rubles, respectively).
  • Herringbone-Turbo, there is 15 kW, there is 30 kW. These units heat the air, but it is possible to make a water jacket.
  • Furnaces “Teplamos” with power from 5 kW/hour to 50 kW/hour. They belong to the category of heat guns (heat the air). The work begins with the electric heating of the plasma bowl, when the required temperature is reached, the fuel supply begins and the forced air supply to the combustion zone is turned on. The price of these units is from 30 rubles per unit with a capacity of 000-5 kW.

Drawings and diagrams

There are many models of furnaces that use waste oil. And below are a few schemes that can give you an idea, and a do-it-yourself oven for working out will be efficient, economical and safe.

Oxygen bottle oven
Scheme of the Gecko oven
Waste oil stove “Typhoon”

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