DE3147412A1 - "COMBUSTION DEVICE FOR SOLID FUELS" - Google Patents

Description

Case 4322 / GER - 3 - November 30, 1981

R e / h ö

Applicant: COAL INDUSTRY (PATENTS) LIMITED

Solid fuel incinerator

DESCRIPTION

The invention relates to improvements in or relating to combustion devices for solid fuels.

According to the invention there is provided a solid fuel combustion apparatus comprising a housing which has a Includes grate. The grate supports a furnace bed within a primary combustion zone within the housing. A front of the case is facing up and back the head end of the device is inclined and has an access for refilling of fuel. The housing includes an inlet opening for supplying primary combustion air into the housing, an outlet port for removing exhaust gas from the housing and a secondary combustion zone between the primary combustion zone and the exhaust gas outlet port. The secondary combustion zone has an entrance port leading to a chamber and one exit opening leading out of the chamber. The cross-sectional area of the chamber is larger than the cross-sectional area of the inlet opening or the exit port of the chamber.

The device expediently includes a boiler Water channels that form smoke channels leading to the exhaust gas outlet opening. A grate is advantageously at the front located in the primary combustion zone. Another water channel can be arranged adjacent to the grate.

The secondary combustion zone is preferably formed in one or more pieces from refractory material (fireclay bricks). the Walls of the chamber of the secondary combustion zone can, advantageously be curvilinear in order to trigger eddies while the device is in operation.

Inlet openings for secondary air can be provided next to the inlet opening into the secondary combustion zone. These Inlet openings can expediently in the front Wall of the chamber of the secondary combustion zone be formed, with a suitable path for the secondary air in the device housing is provided.

For example, the following are two embodiments of one Combustion device according to the invention for solids described with reference to the drawing. In the drawing show:

Fig. 1 is a side view of a first device in cross section and

2 shows the side view of a second device in cross section.

As shown in FIG. 1, the solid fuel combustion apparatus 1 comprises a housing 2 which has a fire grate 4 includes an ash pan 6. A primary combustion zone 8 is formed above the grate 4 and is delimited by it a grate 10, which is arranged within the front 12 of the housing 2, and through a water channel 14 and a wall 16 of the secondary combustion zone 18 at the rear of the primary combustion zone. The front 12 is inclined upwards and backwards towards the head end of the device 1 and includes a door 20, which serves as an access is used to refill fuel, as well as an air inlet opening 22 for the primary combustion. The entrance opening

'"*" · - ■■ ·· * ■ - "" ■ ·' - 3U7412

works together with a slide 24 which is operated by a water thermostat 26. The water channel 14 ends just before the front wall 12 at its head end and leaves direct access between the primary combustion zone 8 and the smoke channel 30 'A closing plate 32 is on the inside the front wall 12 of the housing and can be pivoted from the closed position shown in the figure are moved out so that gases from zone 8 can pass directly into the smoke channel 30 while the device is in operation.

Further water channels 33 are provided at the rear of the housing 2 and form discharge passages 34 for the outflow of incineration waste products. Between the flue 30 and the grate 4, the secondary combustion zone 18 is located _south from the wall 16 and a rear wall 17 is formed and a chamber 19 enclosing the one communicating with the base of the primary combustion zone 8 input port 21 and a directly to the channels 34 has leading outlet opening 23. The chamber 19 has a larger cross-sectional area than both the inlet opening 21 and the outlet opening 23. The walls 16 and 17 are designed to be curvilinear in their inner region facing the chamber 19 in order to induce or increase the formation of eddies in the gas flow from the zone 8.

The wall 16 has one formed in its lower region Channel 40 on. Openings 41 extend through the refractory material and are thus connected to the interior of the channel 40, which is connected to a pipe 42 for secondary combustion air is connected.

During operation, a furnace bed 50 is set up in zone 8, 20 fuel is fed through the door. Primary combustion air arrives, as indicated by the arrows, down through bed 50. Combustion exhaust gases including Volatile constituents get down through the combustion bed and leave the combustion zone 8 and enter the secondary combustion zone 18 through their

Entrance opening 21 therethrough. Before the combustion gases get into the chamber 19, where the gases including the volatile Components subject to combustion, secondary combustion air is released through the openings 41 into the combustion gases injected. The shape of the chamber 19 causes vortex formation promoted in the gases and the residence time improved, resulting in a greater intensity and a greater degree of secondary Combustion results than it would otherwise. The products of combustion coming from the chamber 19 then flow through the passages 34 and thereby transfer heat to the water in the water channels 33.

Referring to Fig. 2, it should be noted that the only difference between the first and second devices is the presence a two pass system in the second device as opposed to a single pass system can be seen on the first device. According to Fig. 2, a further water channel 60 is therefore provided to an additional Form channel 61. At the head end of the additional water channel 60, in addition to the plate 32, there is a further flap 62 provided, so if necessary the gas flow from zone 8 to Direct smoke channel.

All from the description, claims and drawings emerging features and advantages of the invention, including structural details and spatial arrangements, can be essential to the invention both individually and in any combination.

Blank page

Claims (1)

B4TENT / * NI <WE ^ BROSE ¹ ^ BROSE D-0023 Miinchon-Pullnch, WTc / ißr SlJ. & ΤβΓ, (ΟΟΟ) '( 03 JO Ti ; lolnx 0212147 broa d. Cnblor. »L'alotillbuB- Munich 31 Λ7Α1 2 Applicant: COAL INDUSTRY (PATENTS) LIMITED Hobart House, Grosvenor Place, London, SW IX 7 AE, England Graduate engineer Your sign: r = c _Q / looo / pcn ^Ta 9: November 30, 1981 Yourraf: ^taSe ^ "/» t * PATENT CLAIMS 1J solid fuel combustion device with a housing having a grate for supporting a combustion bed within a primary combustion zone within the housing, an entrance opening in the housing for primary combustion air and an outlet opening from the housing for exhaust gas includes, d a through characterized in that an outside (12) of the housing (2) upwards and backwards against the head end of the device (1) is inclined and has an access (20) for refilling fuel, and that a secondary combustion zone (18) between the primary combustion zone (8) and the exhaust gas outlet opening (30) is arranged, wherein the secondary combustion zone (18) has an inlet opening (21) into a chamber (19) and a having exit opening (23) leading out of the chamber, and wherein the cross-sectional area of the chamber (19) larger than the cross-sectional area of the inlet opening (21) or the outlet opening (23). 2 _O device according to claim 1, characterized in that the device (1) includes a boiler with water channels (33), the water channels (33) forming smoke channels (34, 61) which lead to the exhaust gas outlet opening (30). 3. A device according to claim 1 or 2, characterized in that a fire grate (10) is disposed at the front of the primary combustion zone (8) and that a water channel is provided adjacent to the fire grate ₀ 4. Device according to one of the preceding claims, characterized characterized in that the chamber (19) has curvilinear walls (16, 17). 5. Device according to one of the preceding claims, characterized in that, adjacent to the input opening (21) for the secondary combustion zone (18) inlet openings (41) are provided for secondary air. 6. Apparatus according to claim 5, characterized in that the inlet openings (41) for secondary air in a front wall (16) of the chamber (19) are formed, wherein a path (40) is provided for secondary air. 7. Device according to one of claims 2 to 6, characterized in that that the water channels (33) form a single passage (34) for the smoke channel exhaust gases. 8. Device according to one of claims 2 to 6, characterized in that the water channels (33, 60) have two passages (34, 61) form for the smoke duct exhaust gases.