Half-gas inclined grate firing system for low-pressure steam boilers and cooking boilers of all types with pre-built filling shaft

Description

[0001] 8albgas inclined grate firing system for low-pressure steam boilers and cooking boilers of all types with pre-installed filling chute In industrial and Agricultural operations are equipped with a semi-gas inclined grate combustion system for the production of low-pressure steam or hot water. Boilers are used whose side wall is surrounded by a heating channel that is separated from the combustion chamber and the heating flue under the boiler bottom by a The plate is closed. With these boilers, there is a risk that the iron end plate of the combustion chamber will overheat.

[0002] To eliminate this danger, the space between the heating channels surrounding the side wall of the boiler and the combustion chamber has already been improved. The arranged iron end plate is hollow and its interior finitely connected to the water space of the boiler, so that in this way This causes the disk to cool down. However, the cooling of the disk has the consequence that a significant portion of the data generated at the beginning of the process is transferred to the disk. the pyrolysis gases developed from the fuel during the combustion process, which, in the case of proper operation of the combustion system, are used for combustion which are to be brought down, is suppressed. In addition to this adverse effect on combustion, there is also the fact that the deposition of Hydrocarbons and carbon black hinder the transfer of heat to the water contained in the cavity of the plate. Furthermore, The connection of the hollow end plate to the inside of the boiler requires welds, which can easily occur if the manufacturing is not entirely flawless. This can cause malfunctions in the boiler's operation. Furthermore, deposits can easily accumulate in the cavity of the cooled plate, which is inaccessible for cleaning. This leads to the formation of kettle stones, which promote the heating of the plate. Thus, it can happen that despite the cooling of the iron end plate, the Iron parts of the furnace and the adjacent walls are overheated.

[0003] In the semi-gas inclined grate furnace which forms the subject matter of the invention, excessive heating of the iron parts of the Firing should be avoided without impairing the most complete possible combustion of the fuel. This purpose is achieved This is achieved by covering the intermediate plate separating the side heating channel from the combustion chamber with refractory bricks and placing it below the The intermediate wall of the inclined grate, which may optionally be provided with an adjustable deflecting tongue at its front end, is arranged such that The flow of flue gases is directed directly into the heating flue below the boiler by means of the combustion air flowing through the grate, and a Destruction of the partition wall is avoided by the hot combustion gases. The drawing shows two embodiments of the new boiler firing system; Fig. i shows the first embodiment and Fig. 2 shows the second. a cross-section along line B of Fig. i.

[0004] The cylindrical vessel i, whose height is small in relation to its diameter, zeros with its lower edge on a wall formed by masonry. The base 2 of the furnace is formed. A channel 5 is formed around the shell 3 of the boiler by masonry 4, into which the material at the bottom of the boiler is placed. along the route, heating gases enter through a masonry opening 2.

[0005] Against the combustion chamber, onto whose grate 15 the fuel enters via a filling funnel 12, the channel s is at its front end by a plate enclosed, which is formed by stones 7 made of fireclay or another solid mass, supported by an iron beam 6. The beam 6 has dovetail-shaped projections 8 at the bottom, on which the stones 7, provided with corresponding recesses, are attached. are suspended in a specific manner. Instead of the two stones shown in the drawing (7), a single stone can also be used for covering. As can be seen from Fig. 2, the stones 7 are easily replaceable.

[0006] To protect the stones 7 against damage, they are guided forward 7 by a sliding guide io in the rear wall ii of the The movable iron slide plate 9 of the fuel hopper 12 is concealed. When the slide plate 9 is pushed upwards in its sliding guide, the Replacing the stones is easily possible.

[0007] To prevent premature smoldering of the fuel in the filling hopper due to the ingress of air, the joints on the material made of a The number of parts of the hopper wall and the hinged lid 13 closing the filling opening and the stoke door 14 are well sealed.

[0008] The sealing at the joints of the funnel wall is achieved by an intermediate layer of sealant, which covers the entire contact surface between the covered adjoining wall sections.

[0009] The sealing at the openings of the filling funnel wall is achieved by carefully machining the sealing surfaces of the lid 13 and the Fire door 14 and the wall surfaces touched by these parts.

[0010] The inclined grate 15 is arranged below the iron beam covered by refractory bricks according to the invention such that the current The flue gases are directed directly into the heating flue below the boiler by means of the combustion air flowing through the post, thus preventing destruction. the partition wall is destroyed by the hot combustion gases.

[0011] Fig. 3 shows a further embodiment of the invention, which has some special features compared to the one shown in Fig. i; exhibits certain characteristics.

[0012] In this boiler furnace, a conduit leads downwards from the upper part of the fuel hopper 12 through the hopper's rear wall. The conduit is formed by a pipe 16, which opens into the pipe 17 attached to the iron beam 6. The latter is provided with openings made of the pyrolysis gases developed from the fuel in the filling hopper pass through recesses 18 in the stones 7 into the combustion chamber above the grate enter. In this way, the pyrolysis gases can be brought to a suitable point in the combustion process for combustion.

[0013] To increase the combustion of the pyrolysis gases, fresh air can be supplied to the combustion point through a special line. This can be done, for example, by means of a pipe i 9, which leads into the pipe 17 or directly into the combustion chamber above the grate in the The area near the point where the pyrolysis gases emerge is drained.

[0014] The combustion of the combustion gases in the combustion chamber itself can be influenced by regulating the air supply through the grate or the fire bridge. For example, by rotating flap 2o into the position indicated by the dashed line, the flow of combustion air can be directed mainly towards the lower part of the grate. The tongue 20 is rotatable in the joint 2i and can be adjusted from the outside by means of the rod 22. Under certain circumstances, the adjustable tongue 20 can also be replaced by a fixed one. Furthermore, the combustion channel can also be... 24 between the boiler bottom and the masonry 25 by a fire bridge led from the ash chamber below the grate Supply combustion air to channel 26.

Claims

CLAIMS: i. Half-gas, sloping grate firing for low-pressure steam boilers and boiling pans of all types with pre-built filling chute and a heating flue under the boiler and an adjoining side heating duct surrounding the boiler wall, through it characterized in that the intermediate plate (6) separating the lateral heating channel (5) from the combustion chamber is covered by refractory bricks and below the intermediate wall of the inclined grate (15), which may have an adjustable deflection at the front end Tongue (2o) can be provided, is arranged so that the flow of heating gases by means of the combustion air flowing through the grate directly in the heating flue below the boiler. a. Furnace according to claim i, characterized in that at #ler -the lateral heating channel from the Fire chambers separating iron plate (6) the refractory bricks (7) are hung interchangeably.

3. Combustion according to claim i and a, characterized characterized in that in the covered with refractory bricks iron plate (6) after the outlet opening (18) for from the fuel funnel the combustion chamber leading smoldering gas line (16) is arranged.