SU28901A1 - Kiln for burning algae containing iodine - Google Patents

Description

In the proposed kiln for the burning of iodine-containing algae, an additional furnace was used, connected to the kiln's drying space. The furnace for burning or gasification of dried algae is connected by channels with the designated additional furnace at the point of entry of flue gases from the latter into the shaft leading to the drying space of the furnace. To supply additional air to the hot flue gases and to eliminate the burning of algae in the drying part of the flue gases, the said channels are passed at the upper end of the shaft and special perforated pipes are placed under them.

In the drawing of Fig-1 depicts a cross-section of the furnace; FIG. 2 is a top view, partly in section; FIG. 3-cross-section of the drying boards.

The offer: a stove (Fig. 1 and 2) consists of four axis parts: a firebox / 4 for burning or gasification of dried algae, an additional firebox 26 for firewood of the drying part 7 and a shaft 8, in which the generator gas is added to the combustion gas 2 furnace 26 pipes 75.

The furnace 14 has a shaft furnace design and is divided in height by pipes 16 into two parts. In the lower part, algae are burned in a thick layer by incomplete burning on pipes 16; after the upper part, air is sucked from the outside, which serves as air, additionally for the subsequent complete combustion of generator gases in the shaft 8. The height of the upper and lower parts of the furnace J4 is adjusted so that they receive the amount of air required by the burning conditions. The pipes J6 for their cooling are made of gas pipes through which air is sucked outside the furnace /. The amount of this air is regulated by valves 77 at the beginning of each pipe. J6 tubes are embraced with JS scrapers with J9 jigs and handles 20 outside the firebox. Moving these scrapers makes it possible to discharge the ashes from the algae burnt in the generator in the amount of the arbitrariness of the staff, which prevents the ash from lingering in the burning zone more than is allowed by rational process management.

The proposed oven works as follows. The raw algae / are supplied to the platform 2, from where they are transferred to the drying boards 3, which at this time are suspended in an almost horizontal position on their

pins 4. Drying boards 3 (Fig. 3; represent a grate with hooks 5 upwards which hold the algae thrown on them with 6 vertical layers on both sides of the drying grates. The grate loaded in such a way on the platform turns on the pivot 4 and being reduced in a vertical position, it is pushed into the drying chamber 7. Through the latter, air mixed with gases burnt in the shaft 8 is sucked in. A mixture of air and gases, entering the drying chamber from the bottom, due to the tight contact of the drying grates 3 with each other below, enters the cavity 9 of the grids and, having penetrated the layer of algae 6 on the grids, is directed into the gaps 10 between the layers of algae of the adjacent grids and goes through them to the top 4a.CTfi of the drying chamber and then to the pipe 11.

Algae permeated with hot gases are dried to a moisture content of 30-40% and then removed from the dryer by extending the gratings in order of their load. During the opening of the grate, a slit is formed in the front wall of the drying chamber, and after the grate is extended, this gap automatically closes the rear part of the grate 12. When the grate is extended from the drying chamber, a gap forms at the bottom of the chamber, which in order to avoid gas breakthrough besides the algae, it is closed by a flap 13. A lattice with dried algae is pushed out of the chamber and suspended on pins 4 and inverted through 180 °. In this position, the algae easily fall off the grate, as the hooks 5 will be turned down. The cleaned grate is ready for fresh raw algae loading onto it. Dried algae from the grate fall partly on the platform 2, and partly fall directly through the hatch open under the grid opened to the furnace burning them.

From the grates of ash algae burned in the furnace 14, the ash gets into the trolleys 21, which are rolled out through the side doors 22. In the ash chamber of the furnace, through the rear wall, heated air from the preheater 23 comes in at the right temperature for the normal process. The heater 23 is an iron box 24 with open ends that permeates the entire length of the masonry of the furnace part, so that air flows freely into the box from the outside on both sides. From the box 24, iron pipes 25 go to the ash chamber.

Since its own heat from the combustion of algae is not enough to dry them, the furnace 26 is included in the design for burning additional fuel. The type of wood-burning firebox was chosen as normal mine, the simplest design. 26B its rear wall is connected by a fire window 27 to the combustion chamber 8. Firewood is loaded into the shaft from the top of the platform 2. In the rear wall of the shaft 26 there are channels 28 through which the combustible gas of the generator 14 is fed to the fire window 27, passage through iron pipes 15 The gases from the combustion of firewood in the mine, mixing in the window 27 with the gases of the firebox 14, enter the mine 5, where their final combustion takes place. In the shaft 8, a space for air preheater 23 is separated by a longitudinal wall 29, which does not reach the top. A part of the gases of the combustion chamber is sucked through this space and, having washed the heater 23, mixes with the air coming out of the openings of the pipes 16. For a better mixing of the gases with the air, the pipes 16 are continued to the wall 29, where they are sealed in the masonry with their ends. The mixture of gases with air from the space of the air preheater, the passage past the flaps 30, enters the drying chamber 7. The gases from the shaft 8, in turn, mixed with air passing outside through the holes of the perforated pipes 31 through the channel 32 on both sides, in chamber 7.

Due to the fact that the pipe 31 is above the pipe 75, but there is a staggered e in relation to them, it is possible to better mix the gases with air and close the flame of the furnace space from the drying chamber.

The subject matter of the invention.

1. A furnace for burning iodine-containing algae, in which an additional furnace is used, communicated with the kiln's drying space, characterized in that the furnace 14 for burning or

gasification of dried algae is communicated by channels / 5, 75 with an additional firebox 26 at the entry point of flue gases from the last firebox into the shaft 8, leading to the kiln drying space. 2. The form of execution of the furnace mentioned in paragraph 1, characterized in that the channels / 5,

(5) at the upper end of the shaft 8, holed pipes 5 / are placed above their gaps, 5 / serving to supply additional air to the hot flue gases and to prevent algae from burning in the drying part with flue gases.