Horno túnel móvil para ladrillos de arcilla

Varios daños graves del horno túnel de anillo móvil

The structure and production process characteristics of mobile circular tunnel kilns are different from general tunnel kilns. They have relatively less investment, shorter construction time, lower production costs, and lower calcination energy consumption compared to general tunnel kilns. They have developed rapidly in the past decade. Sin embargo, in practical use, the effect is not satisfactory, and there are many defects and problems. Some are inherent structural and quality issues, some are process issues limited by the characteristics of this type of kiln, and some are environmental issues, ultimately affecting the output and quality of products. Most mobile circular tunnel kiln manufacturers have poor product quality and high scrap rates. There are multiple reasons for this “problem kiln”, first of all, the mobile circular tunnel kiln itself has some serious problems and defects, and there are several difficult to treat hard wounds:

1. Los hornos de túnel circular móviles no son adecuados para su uso en zonas frías de invierno en el norte.

Los cuatro procesos principales del apilamiento de ladrillos., el secado, asado, y descarga en este tipo de hornos se disponen en el paso circular del horno., y operar en un ciclo secuencial con el paso del horno circular. No hay instalaciones de calefacción y aislamiento., y la producción se lleva a cabo principalmente en entornos naturales al aire libre. En el horno sólo se instalan toldos impermeables y de protección solar.. Por lo tanto, durante el período de heladas invernales en el norte, the mud in the conveyors, mixers, and brick machines of this production line will be frozen into hard blocks and unable to be produced. Especially the wet billets stacked on the circular kiln, which have long been frozen hard and unusable, will definitely be shut down.

Affected by the cold climate, the effective working period of the mobile circular tunnel kiln is only 6-8 months per year, which cannot reach the total annual output. Anyone who chooses this kiln production line in the cold winter regions of the north has seriously affected the output and quality of the products. Its so-called advantage of high output has become an empty statement, leading to poor overall economic benefits throughout the year.

2. Mobile circular tunnel kilns have special requirements for the construction site.

Because its kiln body is a circular arc ring shape, it is placed on two concentric but unequal diameter circular tracks. La sección transversal del horno tiene una anchura de más de 13 m., incluyendo 4,5 m, 6.5metro, 8.8metro, y 10.m8. Su terreno de construcción es similar al terreno utilizado para la misma escala de producción de una línea de producción de horno túnel de combustión de código único.. Sin embargo, La línea de producción del horno de túnel circular móvil requiere condiciones estrictas en el lugar., y la adaptabilidad de la selección del sitio es pobre, lo que limita la flexibilidad del diseño general del proceso. Una es que el sitio debe ser un cuadrado suficientemente grande (circular), y la otra es que el sitio debe ser plano y nivelado, sin la flexibilidad y adaptabilidad de una línea de producción típica de horno de túnel.

3. No cumple con los requisitos de las normas medioambientales pertinentes..

① La altura del embudo de escape. (Chimenea) para el secado y la tostación las emisiones de gases residuales no cumplen con las normas medioambientales. El extractor de humedad y el extractor de humos del horno de túnel circular móvil están instalados en el horno móvil y se mueven con el horno.. No todos los ventiladores están verticalmente hacia arriba., only the exhaust pipe is installed horizontally, allowing the exhaust gas to be discharged towards the inner side of the circular tunnel through a section of horizontal exhaust pipe. As a result, the exhaust gas diffuses around the factory area, creating a foul atmosphere that not only harms workers but also causes serious pollution to the environment. Some manufacturers have been continuously protested and complained about by surrounding residents, and have been ordered by local environmental protection departments to stop production and rectify.

② The exhaust gas emitted from drying and roasting has not been treated. The fuel used for the calcination products of mobile circular tunnel kilns is coal (pandilla de carbón, escoria, etc.), and the flue gas generated from combustion contains particulate matter such as smoke and dust, as well as gases such as SO2, HF, NOx, CO2, etc., which have not been treated with measures such as flue gas purification, dust removal, and desulfurization, causing significant pollution.

4. Thermal system and drying and roasting thermal process issues of mobile circular tunnel kiln.

① The quality of drying is difficult to guarantee, and uneven drying and dehydration may occur due to climate changes such as season, day and night, sunny and cloudy, cold and warm, dry and wet, which can easily lead to network cracks or mute sounds in the product.

② Due to the integrated connection and movement of the drying chamber and calcination kiln in this type of kiln, La velocidad de secado del tocho está restringida por la velocidad de cocción del horno de calcinación., y no se puede ajustar ni controlar de acuerdo con los requisitos del proceso de secado de palanquillas. La temperatura de la palanquilla que ingresa al horno de calcinación es demasiado alta o demasiado baja., y la humedad residual es demasiado alta o demasiado baja, lo que puede causar grietas o sonidos apagados en el producto.