FI122977B - Procedure in a stove - Google Patents

Description

FIELD OF THE INVENTION The invention relates to a method for an incinerator.

BACKGROUND OF THE INVENTION When heated with solid fuels such as wood, chips, peat or other similar fuels, ash remains after combustion of the above. During incineration, the ash collapses under the burner grate and the ash formed on the grate leaves the ash space of the boiler due to the movement of the grate, and another part of the ash is the so-called fly ash, which flies along the flame and adheres to the convection surfaces. The ash must be removed in one way or another, otherwise the boiler will be filled with ash and its function will be prevented.

The old traditional way of removing ash from a boiler is manual; open the boiler ash removal hatches and manually shovel or ash the ash out of the boiler. For example, where the ash from the ash lee is so-called is a mechanical means. an ash well, from which each ash screw screws the ash into the ash tank. Ash wells often have malfunctions; the ash forms a vault and does not go to the ash screw and there is also the problem that the ash screws leak air which, when uncontrolled, reduces the boiler efficiency.

The system for removing ash from boilers also uses a system whereby the ash falls into successive wells with water and the wells are connected by an underwater tunnel with a chain scraper conveyor. The problem with wet ash is that cd 9 ash is difficult to handle when wet and freezes outdoors in winter. Peat o contains ash, which becomes sulfuric acid when burned, and when £ 30 sulfuric acid gets wet, it becomes sulfuric acid. Sulfuric acid is a very difficult substance

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and insists on neutralization.

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σ> 00 o Certain solutions for ash transfer are disclosed in FI-C-64712 and Fl-A- 814226.

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Summary of the Invention

A simple and effective way to remove ash from under the fire grate and from the ash space of the boiler is to remove the ash. with a rod unloader, which starts under the grate 5 and continues down the bottom of the boiler to the screw for removing the ash from the boiler. The problem in our first experiments was the sealing between the grate and the nest. Sealing is important for good combustion because there must be a small amount of primary air under the combustion head. The boiler body, on the other hand, must be slightly depressurised so that the smoke does not reach the outside of the boiler.

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The solution came from the idea of using ash as a sealant.

The method of the invention is set forth in claim 1. The method of the invention is further set forth in claim 2.

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Brief description of the pictures

Figure 1 is a side view of an incinerator and ash rod unloader applicable to the invention.

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DETAILED DESCRIPTION OF THE INVENTION

Referring to Figure 1, fuel is supplied to the furnace 2 by means of supply means, for example, via a supply line 4. The fuel is made of combustible solid fuels such as wood, straw and peat, for example by cutting, pressing or crushing. The fuel is in the form of chips, briquettes or pellets.

The movable grate 3 is formed, for example, of cast iron grate elements.

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9 on which the actual combustion takes place. From the combustion there is left ash, some of which falls underneath the grate to space 5. Most of the formed ash 30 is pushed by the moving grate 3 as moved by the ash heap 12.

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Figure 1 shows an example of operating means for removing the ash formed at the bottom of the space 5 and at the bottom of the incinerator 2.

° For example, the hydraulic cylinder 6 alternately pulls and pushes back and forth the rod 35 of the tank loader to which the ash carrying scrapers 10 and 14 are attached.

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The scraper 10 reciprocates from position 9 to position 24 to position 15, thereby removing the ash dripped underneath the grate 5 and inserting the ash into a suitable narrowed passageway 11, thereby forming a stopper which impedes gas flow between the pressurized space 5 and the vacuum furnace 2.

Salt 11 is formed by plate 7 and common bottom 20 of space 5 and furnace 2. The pusher movement of scrap 10 must end at position 15, i.e. so that a suitable ash plug remains in the passage 10 and also so that the force of scrap 10 can purge space 5 ash 12. moves the ash, both extruded from space 5 and from the bottom of the furnace 3, to the 10 ash screws 16. The scraper 14 attached to the rod 8 performs the same and simultaneous reciprocating movement as the scraper 10. The scraper 14 moves back and forth from position 18 to 13 12. As the scraper 14 stops beneath the plate 19 in the gutter 21, the stop 18 forms a gas flow stopper. Suppression of the gas flow 15 in the passage 21 is necessary because there is a vacuum difference between the housing of the furnace 2 and the lower part 23 of the convection 22 of the furnace 2.

In Figure 1, the double-headed arrows 9 and 13 show the reciprocal distance traveled by the scrapers 10 and 14. The scraper 17 pushes the ashes onto the ash screw 16 which takes the ash-20 kat out of the incinerator. Smoke exits along duct 1.

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Claims (2)

A method in an incinerator (2) having two or more different pressures in succession, such as a pressurized space (5) underneath the furnace grate (3) and a vacuum housing (2) of vacuum furnace (2) and a lower portion (23) of convection (22). , and inter-space soles (11, 21), characterized in that the ash sealed by rod scraper scrapers (10, 14) is used to seal the pass to prevent gas flow. A method for sealing a passageway (11) underneath a grate (5) underneath a grate (3) in a furnace and a housing (11) for a vacuum furnace (2), wherein a scraper (10) attached to a rod (8) is used to remove ash. in the method, the ash dripped under the grate (3) into the sinister space (5) is pushed by a reciprocating motion of the scraper (10) which only partially enters the gutter (11) to form a plug to prevent gas flow to the gutter (11). under the cock (12) each time the scraper (10) pushes more ash into the gutter (11). C \ J δ (M CD O CD O X en CL 00 O) 00 o o δ {M 5 1. Förfarande i en brännugn (2) med tlie eller flera utrymmen efter varandra med olika tryck, säsom et utrymme (5) med tryck under rosten (3) av 5 brännugnen, och brännugnens (2) eldstad samt convektionens (22) nedre del (23) med undertryck, samt kanaler (11,21) mellan utrymmen, kännetecknat av att Aska som sammanpressats av skrapor (10, 14) av en stängmatare används för att bullet account kanal för att förhindra en gasströmning. 10 2. Förfarande i en brännugn för att dots account en kan (11) mellan et utrymme (5) med tryck under rosten (3) och brännugnens (2) eldstad med undertryck, vid vilket förfarande en skrapa (10) som är fäst pä en Stäng (8) används för att avlägsna Aska, kännetecknat av att i förfarandet ytterligare skjuts Aska som fallit in i utrymmet (5) med tryck under rosten (3) skjuts med en rörelse 15 av Skrapan (10) fram och tillbaka, enbart delvis in I canen (11), picture as plugg av Aska för att förhindra en gasströmning i canen (11), colors askan Väller ut ur canalen (11) under en hög av Aska (12) shade Gäng n Skrapan (10) skjuter mera Aska in i canal (11). C \ l δ CVJ CD O CD O X cc CL 00 CD OO O O δ C \ l