How to make an oven for a garage on long burning firewood with your own hands

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shema The devices of this group of heating devices( also called gas generators) have many advantages over analogues of traditional assembly. If the reader has decided to install a wood burning stove in his garage( DG), it means that he is familiar with all its pluses and minuses. By the way, the latter is not so much, so the choice of this particular design is completely justified.

How to properly mount the furnace for long-burning firewood, which should be provided when assembling it yourself - the reader will be able to learn about all the nuances of the engineering solution and its practical implementation by reading this article.

Features of the

  • operation The firewood in a conventional firebox burns down fairly quickly, and this applies to all types of wood. In practice, this time can be increased only by limiting air access to them. As a result, the "fuel" in the long-burning furnace does not burn, as usual, but smolder, and depending on the volume of the bookmark and the design features of the device - about 6 to 10 hours.
  • If in conventional units the combustion process starts from the bottom, then in the furnaces of the DG, on the contrary - from above. As the firewood burns down, it gradually shifts lower and lower. Therefore, in order to ensure the combustion process in the furnace, it must be vertically oriented. This is one of its differences from the "burzhuyka."
  • Accordingly, the ignition in long-burning furnaces is the upper one, through the air supply pipe.
  • To reduce the burning intensity of firewood and make the process long enough, they must be constantly "pressed", not letting flames develop.

Selection of

bake materials If it comes to a garage, the best option for a DG furnace is iron. In fact, this is a modification of the same, all known, burzhuyki. Given the limited free space in a typical box, laying a brick oven hardly makes sense, and even more so in the garage is a precast, of metal sections or in a frame structure based on a beam and boards mounted with their own hands.

What to take into account

  • The recommended thickness of the metal used for the furnace body is at least 4 mm. But this is for installations that are operated quite often. If the furnace is planned to be used irregularly, this parameter can be reduced( within reasonable limits, otherwise the case will quickly burn out).
  • When assembling the device from the pipe, its minimum cross-section is 30 cm.
  • The withdrawal of the combustion products is through the furnace wall( for the square configuration of the housing - through the rear).The recommended slope of the chimney is from 300 or more, otherwise the draft will not be sufficient. For the same reason, its cross-section is from 12 cm.
It is better to make a chimney for a long-burning stove with a composite. First, for convenience of maintenance( cleaning) of the gas outlet. Secondly, the first knee( docked with the stove) will heat up more than others. Therefore, for it, the thickness of the wall is selected in the range 2.5 - 3 mm. If such a metal is used to assemble the entire chimney, this will make the construction more difficult, and the assembly of a long-burning plant will be somewhat more expensive if the iron has to be bought.

You can mount the entire track and from thinner metal, but in this case the chimney will not last long - it will burn out, and the operation will become less convenient. Therefore, you should focus on the intensity of using the oven. If the car owner spends a lot of time in the garage, then it is not worth saving on the pipe.




How to assemble the long-burning combustion furnace

Knowing the principle of functioning of the furnace and the method of ensuring long-term combustion, it is not difficult to design an assembly and assemble it by one's own hands. In the photo and drawings a fairly simple model is presented. For the furnace body, you can take a metal barrel, a pipe of a design section, a liquefied gas cylinder, a finished box or a box of sheet iron - more than enough options.

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Let us consider the specifics of the manufacture of a stove on long burning firewood from a standard drums for fuel and lubricants. In the opinion of motorists, for the production of their own hands - the best option. True, the walls of the tank are not thick enough, but if the oven does not work for days, then it will last for a long time. And in terms of maintainability - a good engineering solution. If necessary, only the body changes, and all the "rigging" remains the same.

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What is needed for the

  • Barrel.
  • Metal pancake( press) with a diameter slightly smaller than that of the body. How much? It must move freely along the vertical axis. The practice of operating such furnaces shows that to ensure a sustained combustion, a press thickness of 3.5-4 mm is sufficient.
  • Pipes. For a chimney - not less than 15 cm in cross-section, there will be enough for supercharging and 10. The length of the chimney is chosen equal to the height of the shell +( 50 - 100) mm.
  • Corner - "fiftieth"( or channel) - 4 segments. The length of each is about 15 mm.
  • Sheet of metal( grate).
  • Box for utilization of ash.

Furnace body construction

The technology is simple - the top of the barrel is cut off, the edges are aligned. The result is as shown in the figure.

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The lid is also being prepared.

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Its edges need to be bent so that when posing into place, it sat tight enough. In the center, a hole is cut into which the elbow of the blowing pipe will be inserted( or welded).

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Its height is about 15 - 20cm. If the knee is made longer, it will be inconvenient to ignite the furnace.

The pieces of the corner are welded to the bottom of the barrel, on which the grate is placed. All the rest, as well as for an ordinary burner - a door behind which a drawer for removing ash.

Preparation of chimney pipes

p-5 The only explanation is to install a damper( damper), which will regulate the draft. At ignition it is opened, and during operation of the furnace it is covered so that steady and long burning of a bookmark of fuel was provided. It is more convenient to work with a shaker if it is mounted in the 1 st knee. That is why the height of the initial part of the duct to do less than 150 mm is undesirable.

In order for the damper to lock securely in the position selected by the user, you need to think over the elements for fixing it. In principle, it is not difficult to do this with one's own hands.

Extracts

The experience of operating a long-burning combustion plant of such an assembly shows that the length of the duct of the furnace is less than 5 m, greatly weakening the thrust. That's what you need to navigate. Mounting of knees along the entire length of the route is provided by supports from the same corner.

In order to periodically drain condensate from the system, a crane is placed on the knee at the lowest point of the pipeline. For ease of use, it's best to choose a ball type.

Degree of heating of pipes

p-2 It is undesirable to mount them on walls, especially if the interior is finished with a garage. As a rule, the most used materials for facing such structures are plywood, multi-layer, thin board or fiberboard, chipboard. All such products are classified as "combustible".

Press

A hole is made in the metal pancake, taking into account the section of the charge pipe. Evenness of decay of firewood throughout the whole area is ensured, in particular, by a certain position of the cargo. During the operation of the furnace, with the gradual lowering of the press, it should not be skewed. Therefore, from the bottom of the pancake, around the perimeter, cooked pieces of the corner( welded) are welded. Such a revision of the press will ensure its stable orientation in the plane of the horizontal.

How to operate the

  • The part of the supply line is dismantled, the cover is removed and the press is removed.
  • Firewood is laid. It is better to place them vertically, since such a dense setting of the logs will reduce the volume that occupies the air, and will also contribute to their longer burning.
  • Top layer - from flammable fractions( sawdust, small chips).Do not forget that the ignition - on top! The top of the bookmark should be slightly below the level of the hood, otherwise there will be no burning. For the investment of firewood, as in a conventional firebox, they can be put on a rag soaked in a solar paint( or gasoline), paper.
  • Next - in reverse order: load - cover with the first knee( if it is not removable).
To start the installation of a long burning, it is enough to throw a piece of burned paper on the bookmark and see how the fuel "grabs".After this, the slide is maximally extended and the entire duct is connected. The characteristic crackling of firewood indicates that it is time to close the shutter.

As the dear reader could already make sure, neither the assembly by oneself, nor the operation of the stove of a long-burning wood does not present any complexity.

Useful recommendations

  • Reduce the warm-up time of the room and increase the efficiency of the furnace by increasing the heat exchange surface. To do this, to the body of the stove, on each side, it is enough to weld metal plates.
  • It is advisable to leave the plug in the lid of the oven( do not brew).It can be used as an observation window to control the combustion process.
  • The grate is made simply with its own hands. A piece of iron is cut from the metal sheet, corresponding to the diameter of the furnace. And it does not have to be an ideal circle. The holes in the grate are drilled, and their number is selected experimentally. For the standard 200 l drums, the approximate diameter of the holes is 6 to 8 mm. This will be enough for the ash to freely sink down.

Good luck in designing the oven and a warm garage!

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