CN213747623U - Waste heat utilization system in hollow adobe calcination process of gangue - Google Patents

Abstract

The utility model discloses a waste heat utilization system in hollow adobe calcination process of gangue, including baking tunnel kiln and dry tunnel kiln, baking tunnel kiln includes first low temperature zone, preheating zone, baking zone, heat preservation area and second low temperature zone, the right side in first low temperature zone and the left side fixed connection in preheating zone, the right side in preheating zone and the left side fixed connection in baking zone, the right side in baking zone and the left side fixed connection in heat preservation area, the right side in heat preservation area and the left side fixed connection in second low temperature zone, the top of baking tunnel kiln is connected with the kiln top. The utility model provides an in the current hollow adobe calcination process directly discharge the high temperature flue gas, can not utilize the waste heat in its flue gas, not only the contaminated air has wasted the resource moreover, and product density is low simultaneously, intensity is low and the crackle is many to when high temperature is dried wet adobe, the problem that the disposable percent of pass is low.

Description

Waste heat utilization system in hollow adobe calcination process of gangue

Technical Field

The utility model relates to a hollow adobe calcination technical field specifically is a gangue hollow adobe calcination in-process waste heat utilization system.

Background

The hollow brick is commonly used for non-bearing parts, the void ratio is equal to or more than 35%, the brick with large empty size and small quantity is called as the hollow brick, the hollow brick is divided into a cement hollow brick, a clay hollow brick and a shale hollow brick, the hollow brick is a wall main material commonly used in the construction industry, and the hollow brick is a product recommended by the national construction department firstly due to the advantages of light weight, less consumption of raw materials and the like. Compared with red bricks, common manufacturing raw materials of hollow bricks are clay and cinder ash, the hollow bricks need to be roasted in production, but high-temperature flue gas is directly discharged in the roasting process of the existing hollow bricks, waste heat in the flue gas cannot be utilized, air pollution is avoided, resources are wasted, meanwhile, the product density is low, the strength is low, cracks are more, and when wet bricks are dried at high temperature, the one-time qualified rate is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a gangue hollow brick base calcination in-process waste heat utilization system, possess the waste heat to in the high temperature flue gas and utilize, environmental protection and energy saving, product density is high, intensity is high, the crackle is few and the high advantage of disposable qualification rate when high temperature is dried to wet brick base, solved current hollow brick base calcination in-process and directly discharge the high temperature flue gas, can not utilize the waste heat in its flue gas, not only the polluted air, and the resource has been wasted, product density is low simultaneously, intensity is low and the crackle is many, and when high temperature is dried to wet brick base, the problem that disposable qualification rate is low.

In order to achieve the above object, the utility model provides a following technical scheme: a waste heat utilization system in a coal gangue hollow brick blank roasting process comprises a roasting tunnel kiln and a drying tunnel kiln, wherein the roasting tunnel kiln comprises a first low-temperature zone, a preheating zone, a roasting zone, a heat preservation zone and a second low-temperature zone, the right side of the first low-temperature zone is fixedly connected with the left side of the preheating zone, the right side of the preheating zone is fixedly connected with the left side of the roasting zone, the right side of the roasting zone is fixedly connected with the left side of the heat preservation zone, the right side of the heat preservation zone is fixedly connected with the left side of the second low-temperature zone, the top of the roasting tunnel kiln is connected with a kiln top, the kiln top comprises a low-temperature zone, a roasting zone and a heat preservation zone, one side opposite to the low-temperature zone is movably connected with two sides of the roasting zone, the top of the roasting zone is fixedly connected with the bottom of the heat preservation zone, the right side of the roasting tunnel kiln is fixedly communicated with a transverse pipe, the left side of an inner cavity of the transverse pipe is fixedly connected with a first motor through a bracket, the surface of the first motor rotating shaft is movably connected with a first fan blade, the left end of the transverse pipe is fixedly communicated with a connecting pipe, the bottom of the connecting pipe is fixedly communicated with a bent pipe, one end of the bent pipe, far away from the connecting pipe, penetrates into the inner cavity of the drying tunnel kiln, the surface of the bent pipe, located at one end of the inner cavity of the drying tunnel kiln, is fixedly communicated with a spray head, a wet blank placing frame is placed at the bottom of the inner cavity of the drying tunnel kiln, an air outlet hole is formed in the top of the drying tunnel kiln, a short pipe is fixedly communicated with the top of the back of the drying tunnel kiln, the inner cavity of the short pipe is fixedly connected with a second motor through a support, the surface of the second motor rotating shaft is fixedly connected with a second fan blade, the baking zone and the heat preservation zone respectively comprise a red brick building layer, a clay refractory brick building layer and a heat preservation layer, and the inner surface of the red brick building layer is fixedly connected with the outer surface of the heat preservation layer, the inner surface of the heat preservation layer is fixedly connected with the outer surface of the clay refractory brick masonry layer, the heat preservation layer comprises a light brick layer and a rock wool felt layer, the outer surface of the light brick layer is fixedly connected with the inner surface of the rock wool felt layer, the inner surface of the light brick layer is fixedly connected with the outer surface of the clay refractory brick masonry layer, and the outer surface of the rock wool felt layer is fixedly connected with the inner surface of the red brick masonry layer.

Preferably, the first low-temperature zone, the preheating zone and the second low-temperature zone are all composed of red brick masonry layers, and the air outlet holes are circular.

Preferably, the low-temperature area is formed by a cast-in-place concrete slab, the roasting area is formed by a light refractory concrete slab, and the heat preservation area is formed by a refractory fiber felt or a rock wool felt.

Preferably, the light refractory concrete plate is hung below the top bearing beam through a ceramic suspended ceiling, the kiln is provided with an automatic monitoring system, and the kiln car operation system adopts semi-automatic control.

Preferably, the roasting tunnel kiln adopts a large-section kiln type with the inner width of 4.8m, and the kiln body structure is designed into a flat ceiling structure.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a roast tunnel cave, dry tunnel cave, first low temperature zone, the preheating zone, the roast area, the heat preservation area, the second low temperature zone, the kiln crown, the low temperature district, the calcination district, the heat preservation district, violently the pipe, first motor, first flabellum, the connecting pipe, the return bend, the shower nozzle, wet base rack, the venthole, the nozzle, the second motor, the second flabellum, red brick masonry layer, clay refractory brick masonry layer, the heat preservation, light brick layer and rock wool carpet veneer cooperate, possess the waste heat in the high temperature flue gas and utilize, environmental protection and energy saving, product density is high, intensity is high, the crackle is few and the advantage that the high temperature once only qualification rate is high when drying wet brick base, solved present hollow brick calcination in-process and directly discharged high temperature flue gas, can not utilize the waste heat in its flue gas, not only air pollution, and the resource has been wasted, product density is low simultaneously, Low strength and more cracks, and low one-time qualification rate when drying wet green bricks at high temperature.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic left view of the drying tunnel kiln of the present invention;

fig. 3 is a schematic partial sectional view of the roasting or insulation zone of the present invention.

In the figure: 1 baking tunnel kiln, 2 drying tunnel kiln, 3 first low temperature zone, 4 preheating zone, 5 baking zone, 6 heat preservation zone, 7 second low temperature zone, 8 kiln top, 9 low temperature zone, 10 baking zone, 11 heat preservation zone, 12 horizontal pipe, 13 first motor, 14 first fan blade, 15 connecting pipe, 16 bent pipe, 17 spray head, 18 wet blank placing rack, 19 air outlet hole, 20 short pipe, 21 second motor, 22 second fan blade, 23 red brick masonry layer, 24 clay refractory brick masonry layer, 25 heat preservation layer, 26 light brick layer, 27 rock wool felt layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, a waste heat utilization system in a coal gangue hollow brick blank roasting process comprises a roasting tunnel kiln 1 and a drying tunnel kiln 2, wherein the roasting tunnel kiln 1 comprises a first low-temperature zone 3, a preheating zone 4, a roasting zone 5, a heat preservation zone 6 and a second low-temperature zone 7, the right side of the first low-temperature zone 3 is fixedly connected with the left side of the preheating zone 4, the right side of the preheating zone 4 is fixedly connected with the left side of the roasting zone 5, the right side of the roasting zone 5 is fixedly connected with the left side of the heat preservation zone 6, the right side of the heat preservation zone 6 is fixedly connected with the left side of the second low-temperature zone 7, the top of the roasting tunnel kiln 1 is connected with a kiln top 8, the kiln top 8 comprises a low-temperature zone 9, a roasting zone 10 and a heat preservation zone 11, the opposite side of the low-temperature zone 9 is movably connected with the two sides of the roasting zone 10, the top of the roasting zone 10 is fixedly connected with the bottom of the heat preservation zone 11, the right side of the roasting tunnel kiln 1 is fixedly communicated with a horizontal pipe 12, the left side of the inner cavity of the transverse pipe 12 is fixedly connected with a first motor 13 through a support, the surface of the rotating shaft of the first motor 13 is movably connected with a first fan blade 14, the left end of the transverse pipe 12 is fixedly communicated with a connecting pipe 15, the bottom of the connecting pipe 15 is fixedly communicated with a bent pipe 16, one end of the bent pipe 16 far away from the connecting pipe 15 penetrates through the inner cavity of the drying tunnel kiln 2, the surface of the bent pipe 16 at one end of the inner cavity of the drying tunnel kiln 2 is fixedly communicated with a spray head 17, a wet blank placing frame 18 is placed at the bottom of the inner cavity of the drying tunnel kiln 2, the top of the drying tunnel kiln 2 is provided with an air outlet 19, the top of the back of the drying tunnel kiln 2 is fixedly communicated with a short pipe 20, the inner cavity of the short pipe 20 is fixedly connected with a second motor 21 through a support, the surface of the rotating shaft of the second motor 21 is fixedly connected with a second fan blade 22, the baking zone 5 and the heat preservation zone 6 both comprise a red brick masonry layer 23, a refractory brick masonry layer 24 and a heat preservation layer 25, the inner surface of the red brick masonry layer 23 is fixedly connected with the outer surface of the heat preservation layer 25, the inner surface of the heat preservation layer 25 is fixedly connected with the outer surface of the clay refractory brick masonry layer 24, the heat preservation layer 25 comprises a light brick layer 26 and a rock wool felt layer 27, the outer surface of the light brick layer 26 is fixedly connected with the inner surface of the rock wool felt layer 27, the inner surface of the light brick layer 26 is fixedly connected with the outer surface of the clay refractory brick masonry layer 24, the outer surface of the rock wool felt layer 27 is fixedly connected with the inner surface of the red brick masonry layer 23, the first low-temperature zone 3, the preheating zone 4 and the second low-temperature zone 7 are all composed of the red brick masonry layer 23, the air outlet 19 is circular, the low-temperature zone 9 is composed of cast-in-place concrete slabs, the roasting zone 10 is composed of light refractory concrete slabs, the heat preservation zone 11 is composed of refractory fiber felts or rock wool felts, the light refractory concrete slabs are hung below a bearing beam on the top through ceramics, the kiln is provided with an automatic monitoring system, a kiln car operation system adopts semi-automatic control, a roasting tunnel kiln 1 adopts a large-section kiln type with the inner width of 4.8m, the kiln body structure is designed to be a flat suspended ceiling structure, and the kiln has the advantages of utilizing the waste heat in high-temperature flue gas, protecting environment, saving energy, having high product density, high strength, few cracks and high one-time qualification rate when the wet green bricks are dried at high temperature by matching the roasting tunnel kiln 1, a drying tunnel kiln 2, a first low-temperature zone 3, a preheating zone 4, a roasting zone 5, a heat preservation zone 6, a second low-temperature zone 7, a kiln top 8, a low-temperature zone 9, a roasting zone 10, a heat preservation zone 11, a transverse pipe 12, a first motor 13, a first fan blade 14, a connecting pipe 15, a bent pipe 16, a spray head 17, a wet green brick placing rack 18, an air outlet 19, a short pipe 20, a second motor 21, a second fan blade 22, a red brick masonry layer 23, a clay masonry layer 24, a heat preservation layer 25, a heat insulation layer 25, a heat preservation layer 25, a light brick layers 26 and a rock wool felt layer 27, the problem of current hollow adobe calcination in-process directly discharge the high temperature flue gas, can not utilize the waste heat in its flue gas, not only polluted air, wasted the resource moreover, product density is low, intensity is low and the crackle is many simultaneously to when high temperature is dried to wet adobe, disposable percent of pass is low is solved.

When in use, the roasting tunnel kiln 1 adopts a large-section kiln type with the inner width of 4.8m, the kiln body structure is designed to be a flat suspended ceiling structure, the roasting process is mainly full internal combustion, coal is not thrown outwards, the walls of the tunnel kiln preheating zone 4, the first low-temperature zone 3 and the second low-temperature zone 7 are built by red bricks, the innermost layers of the kiln walls of the roasting zone 5 and the heat preservation zone 6 are built by clay refractory bricks, the heat preservation layer 25 adopts light bricks and rock wool felt, the outer wall is built by red bricks, the kiln top adopts cast-in-place concrete top plates at the low-temperature zones 9 at the two ends, in the roasting section, the light refractory concrete plate at the inner layer is hung under a bearing beam at the top through a ceramic suspended ceiling, the heat preservation layer 25 consisting of refractory fiber felt and rock wool felt is laid on the concrete plate, the kiln is provided with an automatic monitoring system, the kiln car operation system adopts semi-automatic control, the roasting adopts a novel energy-saving kiln, and after raw materials such as shale, firewood coal and construction waste are mixed and crushed, the brick blanks are piled on a kiln car through a robot, the high-temperature sintering is carried out through a semi-automatic control kiln car, the temperature is increased to 400-500 ℃ in the roasting process, namely preheating is carried out, when the temperature reaches 600 ℃, chemical crystal water is lost in the brick blanks, organic matters begin to burn, when the temperature reaches 800 ℃, carbonate is decomposed to over 900 ℃, metal oxides and silicon compounds in the blanks form silicates and become liquid phases, the molten glass firmly combines other particles, the blanks are recrystallized through cooling, the blanks are brick products, an external controller controls the operation of a first motor 13 and a second motor 21, the operation of the first motor 13 drives the rotation of a first fan blade 14, a heat source of a drying tunnel kiln 2 comes from the residual heat of a roasting tunnel, smoke is sprayed out from a spray nozzle 17 through a transverse pipe 12, a connecting pipe 15 and a bent pipe 16, the brick blanks firstly enter a drying chamber through the kiln car to be dried, the formed wet blank is dehydrated and dried to meet the firing requirement of the annular kiln through heat exchange between the wet blank and hot waste gas (drying medium) generated by the annular kiln, preparation is made for firing the blank body, the drying mode of the drying chamber adopts positive pressure moisture removal and bottom hot air supply, hot air comes from high-heat smoke generated by firing, the hot air exchanges heat with the green brick through a gap of the green brick, the second motor 21 drives the second fan blades 22 to rotate, the smoke subjected to natural gravity dust removal is exhausted, meanwhile, water vapor generated by the drying chamber is discharged through the air outlet 19 on the top of the kiln, the brick body is gradually dehydrated in a non-high-temperature state, and the product is high in density, high in product strength, few in cracks and high in one-time qualification rate during high-temperature drying.

All kinds of parts used in the application document are standard parts and can be purchased from the market, the specific connection mode of all parts adopts conventional means such as mature bolts, rivets, welding and the like in the prior art, the conventional models in the prior art are adopted for machinery, parts and electrical equipment, the conventional connection mode in the prior art is adopted for circuit connection, and detailed description is not given here.

In summary, the following steps: the waste heat utilization system in the coal gangue hollow brick blank roasting process is characterized in that a roasting tunnel kiln 1, a drying tunnel kiln 2, a first low-temperature zone 3, a preheating zone 4, a roasting zone 5, a heat preservation zone 6, a second low-temperature zone 7, a kiln top 8, a low-temperature zone 9, a roasting zone 10, a heat preservation zone 11, a horizontal pipe 12, a first motor 13, a first fan blade 14, a connecting pipe 15, a bent pipe 16, a spray head 17, a wet blank placing frame 18, an air outlet 19, a short pipe 20, a second motor 21, a second fan blade 22, a red brick masonry layer 23, a clay refractory brick masonry layer 24, a heat preservation layer 25, a light brick layer 26 and a rock wool felt layer 27 are matched, the problem that high-temperature flue gas is directly discharged in the existing hollow brick blank roasting process is solved, waste heat in the flue gas can not be utilized, air is polluted, resources are wasted, the product density is low, the strength is low, cracks are more, and when the wet brick blank is dried at high temperature, low one-time qualification rate.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a waste heat utilization system among hollow adobe calcination of gangue, includes to bake tunnel kiln (1) and dry tunnel kiln (2), its characterized in that: the roasting tunnel kiln (1) comprises a first low-temperature zone (3), a preheating zone (4), a roasting zone (5), a heat preservation zone (6) and a second low-temperature zone (7), the right side of the first low-temperature zone (3) is fixedly connected with the left side of the preheating zone (4), the right side of the preheating zone (4) is fixedly connected with the left side of the roasting zone (5), the right side of the roasting zone (5) is fixedly connected with the left side of the heat preservation zone (6), the right side of the heat preservation zone (6) is fixedly connected with the left side of the second low-temperature zone (7), the top of the roasting tunnel kiln (1) is connected with a kiln top (8), the kiln top (8) comprises a low-temperature zone (9), a roasting zone (10) and a heat preservation zone (11), one side, opposite to the low-temperature zone (9), is movably connected with two sides of the roasting zone (10), and the top of the roasting zone (10) is fixedly connected with the bottom of the heat preservation zone (11), the baking tunnel kiln comprises a baking tunnel kiln body (1), a transverse pipe (12) is fixedly communicated with the right side of the baking tunnel kiln body (1), a first motor (13) is fixedly connected to the left side of an inner cavity of the transverse pipe (12) through a support, a first fan blade (14) is movably connected to the surface of a rotating shaft of the first motor (13), a connecting pipe (15) is fixedly communicated with the left end of the transverse pipe (12), a bent pipe (16) is fixedly communicated with the bottom of the connecting pipe (15), one end, far away from the connecting pipe (15), of the bent pipe (16) penetrates through the inner cavity of a drying tunnel kiln body (2), a spray head (17) is fixedly communicated with the surface of one end, located at one end of the inner cavity of the drying tunnel kiln body (2), of the drying tunnel kiln body (2) is provided with a wet blank placing frame (18) at the bottom of the inner cavity of the drying tunnel kiln body (2), an air outlet hole (19) is formed in the top of the drying tunnel kiln body (2), a short pipe (20) is fixedly communicated with the top of the drying tunnel kiln body (2), the inner cavity of the short pipe (20) is fixedly connected with a second motor (21) through a bracket, the surface of the rotating shaft of the second motor (21) is fixedly connected with a second fan blade (22), the roasting belt (5) and the heat preservation belt (6) both comprise a red brick masonry layer (23), a clayey refractory brick masonry layer (24) and a heat preservation layer (25), the inner surface of the red brick masonry layer (23) is fixedly connected with the outer surface of the heat-insulating layer (25), the inner surface of the heat-insulating layer (25) is fixedly connected with the outer surface of the clay refractory brick masonry layer (24), the heat-insulating layer (25) comprises a light brick layer (26) and a rock wool felt layer (27), the outer surface of the light brick layer (26) is fixedly connected with the inner surface of the rock wool felt layer (27), the inner surface of the light brick layer (26) is fixedly connected with the outer surface of the clay refractory brick masonry layer (24), the outer surface of the rock wool felt layer (27) is fixedly connected with the inner surface of the red brick masonry layer (23).

2. The waste heat utilization system in the roasting process of the coal gangue hollow adobe according to claim 1, is characterized in that: the first low-temperature zone (3), the preheating zone (4) and the second low-temperature zone (7) are all composed of red brick masonry layers (23), and the air outlet holes (19) are circular.

3. The waste heat utilization system in the roasting process of the coal gangue hollow adobe according to claim 1, is characterized in that: the low-temperature area (9) is composed of a cast-in-place concrete slab, the roasting area (10) is composed of a light refractory concrete slab, and the heat preservation area (11) is composed of a refractory fiber felt or a rock wool felt.

4. The waste heat utilization system in the roasting process of the coal gangue hollow adobe according to claim 3, is characterized in that: the light refractory concrete slab is hung below the top bearing beam through the ceramic suspended ceiling, the kiln is provided with an automatic monitoring system, and the kiln car operation system adopts semi-automatic control.

5. The waste heat utilization system in the roasting process of the coal gangue hollow adobe according to claim 1, is characterized in that: the roasting tunnel kiln (1) adopts a large-section kiln type with the inner width of 4.8m, and the kiln body structure is designed into a flat suspended ceiling structure.

Images