RU2652036C1 - Filter stone-heat recovery unit with movable bed - Google Patents

Abstract

FIELD: manufacturing technology.

SUBSTANCE: invention relates to the production of mineral wool, products from basalt casting, slag glass-ceramics, the production of glass and articles thereof, to other manufactures of building materials, namely to filter (granular) stones. Filter with a movable bed of bulk material for cleaning hot smoke furnace gases from dust, which is a vertically oriented monoblock, has a hopper for loading bulk material, gas collectors, successively placed after said hopper for loading, a filtering heat exchange layer, a hopper of hot rubble and a gate-metering device. As a bulk material, crushed stone is used, the said hopper for loading is made with a multi-boned bottom equipped with telescopic nozzles, gas manifolds are evenly placed in the filtering heat exchange layer, and the total area of the outlets of the gas collectors in the section of the outlet of the flue gases is 0.4–0.6 of the cross-sectional area of the filtering heat exchange layer.

EFFECT: technical result is the reduction of the overall dimensions of the filter, the uniform distribution of flue gases along the filter section, the regulation of the hydraulic resistance, the possibility of supplying high-temperature flue gases with a maximum temperature, which excludes the formation of cakes of heated crushed stone.

1 cl, 1 dwg

Description

The invention relates to the production of mineral wool, products from basalt casting, slag metal, the production of glass and products from it, other production of building materials, namely to crushed stone (granular) filters, intended for cleaning hot flue furnace gases from dust with simultaneous heat recovery in a moving a layer of crushed stone enriched with kiln aerosols heated by flue gases and thus prepared for loading into the kiln.

Closest to the claimed filter is a device that implements the method (patent RU 2376539) of heat treatment of bulk material, carried out in a continuous zigzag uniform pouring of the processed material stream while maintaining continuity without reverse movement. In this case, the pouring of the flow is organized by loose inclined shelves (gas-permeable, perforated) mounted inside the shaft on two opposite walls in a checkerboard pattern at an angle whose value is selected no more than the angle of repose of the processed material. Heat treatment is carried out with gaseous products directed to the surface of the material flow located under the overflow shelf, formed due to the angle of its natural slope. At the same time, gaseous products are sucked through a layer of bulk material on the overflow shelf located above their (gaseous products) supply point.

Such a device has disadvantages:

- significant dimensions due to large angles of repose;

- unregulated hydraulic resistance due to unregulated thickness of the layer of granular material on the loose perforated shelves;

- the temperature of the gaseous products is not more than 500-600 degrees Celsius, which is determined by the design features of the overflow perforated shelves in direct contact with the gaseous products.

The problem solved by the claimed invention is to expand the arsenal of technical equipment for a similar purpose.

The technical result consists in the implementation of this purpose.

The problem is solved in that the filter with a moving layer of granular material for cleaning hot flue gas from dust is a vertically oriented monoblock having a hopper for loading granular material and gas collectors, and crushed stone is used as bulk material. The specified monoblock contains sequentially placed after the specified hopper for loading a filtering heat exchange layer, a hopper of hot crushed stone and a shutter-dispenser, while the specified hopper for loading is made with a multi-pipe bottom equipped with telescopic pipes. Gas collectors are evenly placed in the filtering heat transfer layer, and the total area of the outlet pipes of gas collectors in the flue gas exit section is 0.4-0.6 of the cross-sectional area of the filtering heat transfer layer.

The invention is illustrated in the drawing, where in FIG. 1 shows the claimed filter in section.

The claimed filter is a vertically oriented monoblock and contains a hopper 1 with a multi-pipe bottom for loading bulk material, which is used as crushed stone. The filter also has a filtering heat exchange layer 2, height-adjustable by telescopic loading nozzles 5, gas manifolds 3, equipped with outlet nozzles 7, combined in height with the filtering heat-exchange layer, as well as a hot crushed stone hopper 4 and a metering valve 6.

Gas collectors are evenly placed in the filtering heat transfer layer, and the total area of the outlet pipes of gas collectors in the flue gas exit section is 0.4-0.6 of the cross-sectional area of the filtering heat transfer layer.

The main algorithm of the filter is that the heated gravel and cooled gases are supplied countercurrently, providing efficient heat transfer. In this case, the supply of crushed stone is fed through the multi-pipe bottom of the hopper 1, ensures its uniform distribution over the surface of the filtering heat transfer layer 2, while reducing the height of the filter. Hot flue gases are fed through the outlet pipes 7 of the gas collectors 3, evenly placed in the filtering heat exchange layer 2 and cooled by contact with cold gravel flowing around the collectors 3. The degree of cooling and dedusting of the flue gases is determined by the height of the filtering heat exchange layer 2, controlled by telescopic loading nozzles 5. Heated crushed stone, enriched in trapped dust, enters the hopper of hot crushed stone 4 and is discharged into the furnace with an installed capacity through the shutter-dispenser 6.

Thus, the filter has:

- minimum overall dimensions;

- uniform distribution of flue gases over the cross section of the filter;

- adjustable hydraulic resistance;

- the ability to supply high-temperature flue gases with a maximum temperature, eliminating the formation of cakes of heated crushed stone.

Claims (1)

A filter with a moving layer of bulk material for cleaning hot flue gas from dust, which is a vertically oriented monoblock, having a hopper for loading bulk material and gas manifolds, characterized in that crushed stone is used as bulk material, said monoblock additionally contains sequentially placed after said a hopper for loading a filtering heat transfer layer, a hopper of hot rubble and a shutter-dispenser, while the specified hopper for loading is made with multi-tubes The gas collectors are uniformly located in the filtering heat exchange layer, and the total area of the outlet pipes of gas collectors in the flue gas exit cross section is 0.4-0.6 of the cross-sectional area of the filtering heat transfer layer.

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