CZ14623U1 - Cylindrical combustion grate with fire bars having eyes for solid fuel burning boilers - Google Patents

Description

Cylindrical boiler combustion grate with grates with solid fuel eyes

Technical field

The technical solution concerns the heating equipment, namely automatically controlled boilers with a cylindrical boiler combustion grate with grates with eyes for burning brown coal, wood chips, pellets and mixed fuel with the output over 50 kW.

BACKGROUND OF THE INVENTION

Existing cylindrical grates with in-line grate inserts, which are equipped with automatically controlled boilers for brown coal, wood chips, pellets, still present a number of problems, in particular:

- low resistance to combustion temperatures of the above fuels,

- low shelf life, which increases heating operating costs,

- significant production costs due to the use of stainless steel materials, problems with different thermal expansion,

- problems with the grating elements of the grates and the installation effort of replacing the grates.

These problems result in deformation of grates and grate bars, consequent jamming of grates and thus also boiler failures.

The above-mentioned disadvantages are solved and eliminated by the design of cylindrical boiler grates with grates with solid fuel eyes according to the technical solution.

The essence of the technical solution

The new grate construction according to the technical solution consists mainly in the sliding gripping of the center of the grates forming the peripheral sheath of the grate on the slats of the slatted body, which protects the slats against direct heat exposure compared to the standard design. They are better cooled by suction air and it is ensured in the longitudinal and transverse direction of the grate release (thermal expansion, shaking ash from the grate holes in the lower position, etc.). The slats protected by grate can be made of materials of common quality. The grate is fixed by inserting the lugs on the bottom side of the grate into the notches in the slats, which also ensures versatility when folding the grate from several grate in a row side by side. The edge grate is secured axially, with appropriate clearance for the possibility of expansion in both radial and axial direction, secured on one side by a pin from the grate front. Own grate made of high-quality material resistant to temperatures of 1200 ° C, it forms a folded perimeter sheath of the grate. The grates are provided with a system of oval vents in the longitudinal direction and circumferentially ensuring a uniform air supply to the combustion section on a part of the grate circumference. Their design also ensures quality cooling by the incoming combustion air. On the upper part they are equipped with a rake for fuel displacement (drift) during step program rotating of the grate. BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings show an exemplary embodiment of a grate and grates according to the technical solution of FIGS. 1, 2, 3, 4 and 5.

Examples of technical solution

The grate according to the invention consists of a body 7, fronts 2, slats 4 with notches 5, slats 6 with lugs 6 and locking pins 3. The cell 2, slats 4 with notches 5 and the body 7 form a weldment. The slats 4 with notches 5 are fitted with grates 1 with lugs 6, which are secured against falling out on one side from the fronts 2 with pins 3. The grates 1 with lugs 6 are provided with vents 8, rakes 9, locking holes 10 and grooves 11. The vents 8 provide a uniform supply of combustion air in the defined fireplace space. The method of grating the grates with the lugs 6 on the slats 4 with the notches 5 ensures a perfect loosening of the grates even for thermal dilatations in the axial and radial direction. The grates 1 are made of heat-resistant materials up to 1200 ° C, which together with the grate cooling system by the intake combustion air ensures a long service life of the grates I and the whole grate. The fronts 2, the slats 4 and the body 7 are protected by the invention from the grate sheath 1 against direct contact with fire and can be made of materials of usual quality. The equipment of the grates and the rake 9 ensures a perfect supply of fuel to the combustion chamber as well as exhaust of the burnt ash to the ashtray. At the same time, the technical solution also ensures easy replacement of the grate bars I.

The cylindrical boiler combustion grate with grate with solid fuel mesh according to the technical solution is usable mainly for all boilers and heating equipment and hearths with a cylindrical grate for combustion of solid fuels such as lignite, biomass, pellets and mixed fuel with output over 50 kW.

Claims (2)

PROTECTION REQUIREMENTS A cylindrical boiler combustion grate with grate elements for solid fuels comprising a body (7), slats (4), fronts (2), pins (3) and grate elements (1), characterized in that the body (7) is fitted with slats (4) with notches (5) and fronts (2), the grates (1) being slidably grooved (11) 15 on the slats (4) and fastened with lugs (6) in the notches (5) and are unilaterally secured against release by pins (3) and fronts (2). Cylindrical boiler grate with solid fuel mesh grate according to claim 1, characterized in that the grate (1) is fitted with vents (8), rakes (9), and holes (10) for securing.