FI70638B - COMBINATION SPANNA FOER FAST BRAENSLE - Google Patents

Description

70638

SOLID FUEL COMBINATION BOILER

The present invention relates to a heating boiler which burns solid fuels in a separate special combustion chamber and in which the flue gases are led to a convection section acting as an accumulator. In addition, a separate oil burner unit formed by a horn-fire tube group is located in the water part of the accumulator. In addition, a hot water coil and an electric resistance group can be placed in the water part of the accumulator. The flue gases of the solid fuel and the flue gases of the oil combustion flow completely separately from each other in separate groups of pipes inside the water jacket of the accumulator and the combustion events thus do not interfere with each other.

The use of solid fuel for heating buildings and producing hot water is problematic from a technical and economic point of view in both small and large units.

If the solid fuel heating plant is dimensioned for the entire power demand, this will result in a large investment per unit of power, while driving small loads, such as a hot water load, during the summer time will prove almost impossible. The total heat load of dwellings and residential areas is characterized by large load variations, which also includes the fact that the energy content during the maximum winter load is small due to its relatively short duration. In order to handle such a load, the procedure is generally to build a separate solid fuel heat generation unit for about half of the total power demand and a separate oil-fired heat generation unit for the rest of the power demand, respectively.

* 2- 70638 In addition, in many cases it is necessary to build a separate accumulator to compensate for load fluctuations and to facilitate the automatic operation of the solid fuel boiler. These separate structural units must be connected to each other in a pump, valve and piping arrangement, which causes an increase in space requirements, increases the purchase price and prevents the so-called module or package delivery. The object of the invention is to combine all the above-mentioned functions with the correct and purpose-designed structural solutions into one unit, to reduce the construction costs of the combination, to reduce the need for space and to improve the functionality of the heat generation process.

The device according to the invention provides a decisive improvement in the above-mentioned drawbacks. To achieve this, the device according to the invention is characterized by what is stated in the characterizing part of the claim. The solid fuel combustion chamber, the accumulator-boiler cylinder and the flue-fire tube-oil burner register form a common entity, which is built at the factory with its platforms as a finished entity. A hot-water coil and an arbitrary number of electric heating resistors can be placed in the current water space. With respect to the characterizing aspects of the invention, reference is made to the claim.

An embodiment of a combination boiler according to the invention is described in more detail in the following description with reference to the accompanying drawings, in which

Figure 1 is a schematic top view of the space in combination

Figure 2 shows the combination boiler in a side section added along the flue gas path

Figure 3 shows a front view of the combination boiler.

The combination boiler shown in the figures is formed by a solid fuel combustion chamber 1, a convection surface 2 of solid fuel flue gases eccentrically placed in a cylindrical water space, i.e. an accumulator 3, duct 6, separately removable oil burner-horn-fire tube group 7, where the flue gases exit from the bulb-side front end to the oil burner flue 8, hot water coil 9 mounted on the accumulator at the outlet at the top and the return water connection 12 at the beginning of the water-cooled foot grate inlet pipe, the water-cooled foot grate 13, the supply or return connection 14 to the accumulator at the bottom of the accumulator at the first draft of the solid fuel flue gas. next to the bipatter.

In addition to the previously mentioned functions, the arrangement of the devices according to the invention achieves many operational technical advantages. When the solid fuel firebox is full of fuel at rated output and the heating center remains de-energized, this usually means boiling, pressure rise, safety valve opening, water loss, and the need to add water when the water cools when the pump water cycle stops in a normal plant. These disadvantages do not occur in the plant according to the invention. The amount of energy contained in the firebox can be stored in the accumulator section in all practically existing situations. The boiler according to the invention is suitable for the heat supply of so-called low-temperature district heating networks, especially because the return temperature of the network is low (30 ... 40 ° C) and when the upper battery temperature is normally about 100 ° C. . The low return temperature, in turn, results in efficient heat transfer from both the solid fuel and oil combustion tube group and a rapid ramp-up of the battery.

The power range of the boiler according to the invention is most suitable for detached and terraced houses up to medium-sized district heating networks (15-1500 kW).

Claims (1)

"70638 CLAIM wherein the water space cylinder is an oversized water tank forming a hot water tank, i.e. an accumulator (3), in which the tube group (2) is arranged eccentrically so that the accumulator has space for other heat generation and heat transfer elements, characterized in that the boiler accumulator the oil burner heat generating unit (7), in which the flue gases are removed from the front (8) end of the oil burner side, can be detached by means of bolt connections, whereby the entire fire surface part can be pulled out,