новые моменты, на которые следует обратить внимание при выборе туннельной печи

1. Выберите зрелые технические решения, чтобы гарантировать, что производственная линия соответствует стандарту и достигает производственной мощности..

При использовании туннельной печи для обжига кирпича, различные параметры, используемые в производстве, должны определяться в соответствии с основными свойствами сырья..

Производительность печи соответствует требованиям национального стандарта., не только то, сколько уволено, а производительность печи сколько. Некоторые изделия, обожженные в печи, имеют толщину поверхности всего 3–4 мм., но внутри не полностью обстрелян. Такая продукция, не соответствующая требованиям национального стандарта, не может быть использована в качестве основы для расчета производительности туннельной печи..

Длина, ширина и высота печи рассчитываются в зависимости от производительности печи. При расчете длины, ширина и высота печи, скорость нагрева и охлаждения сырья, время обжига сырья, следует учитывать самую высокую температуру обжига и диапазон температур обжига.. И другие факторы.

2. Reasonable layout of the tunnel kiln system to make the firing stable.

According to the definition of tunnel kiln, tunnel kiln should be equipped with ventilation system, fuel combustion system, vehicle entry system, and sealing system. These subsystems constitute the working system of tunnel kiln. The close cooperation of each system can make the tunnel kiln work normally.

В соответствии с требованиями атмосферы обжига в печи, количество и положение вентиляторов, используемых в печи, оборудованы, давление воздуха вентиляторов определяется в зависимости от формы обжигаемых изделий и плотности печи, а объем вентиляции вентиляторов определяется в зависимости от мощности.

В зависимости от того, какое топливо используется, метод системы сгорания топлива, какое оборудование для сжигания использовать, расположение и количество топочного оборудования должны обеспечивать максимально равномерную температуру в печи.. Основным содержанием, включенным в систему входа, являются режим входа и временной интервал входа..

Система уплотнений включает в себя уплотнение между тележкой печи и корпусом печи., уплотнение между дверцей печи и корпусом печи, уплотнение между трубопроводом и корпусом печи, и уплотнение между вагонами печи. Он изолирован, чтобы сформировать хорошее пространство для обжига внутри туннельной печи., чтобы полуфабрикат можно было обжечь в готовое изделие внутри печи.

3. Recognize the importance of kiln car and ensure the stable quality of fired products.

The kiln car is an indispensable equipment in the production process of the tunnel kiln, and it is also the key equipment related to the performance of the tunnel kiln and whether it can be used normally.

In order to make the kiln car play the role of key equipment, the first thing is to maintain a good seal between the kiln car and the tunnel kiln body, so as to completely isolate the inside of the kiln from the outside of the kiln, so that the cold air outside the kiln cannot enter at will In the kiln, the hot air in the kiln will not leak into the kiln, so that the firing process in the kiln can be carried out smoothly.

Во-вторых, the seal between the kiln cars should also be reliable, the reason is as mentioned above. Third, the operation of the kiln car should be stable, so as to avoid the occurrence of such phenomena as kiln collapse, uneven firing, and difficulty in entering the car. Fourth, the thermal insulation layer on the kiln car is very important. If the thermal insulation layer of the kiln car has a good thermal insulation effect, the temperature in the kiln will be consistent, the quality of the fired products will be uniform, and the color will be the same. If the thermal insulation effect of the kiln car is not good, Then, the temperature difference between the upper and lower sides of the kiln will be large, and the fired products will be cooked on the top and cooked on the bottom, or cooked on the top and under the coke. In short, the product quality is uneven and the color difference is large.

Some factories have been in operation for less than a year, and the kiln car often has problems and needs to be replaced, which not only increases production costs, but also changes the understanding of tunnel kilns, and feels that tunnel kilns are inferior to other kilns. Фактически, the root cause is the insulation layer of the kiln car, and the seemingly simple insulation layer problem has not been properly handled.

Some kiln cars did not reduce the thickness and material of the thermal insulation layer, but the thermal insulation effect was still very poor. Why is the temperature under some tunnel kiln cars only 40℃~50℃, people can check it smoothly under the car, while the temperature under some cars is so high that people can’t get into the car at all. Фактически, the reason is very simple, it is caused by the gap in the insulation layer of the kiln car.

1. Construction materials must be guaranteed.

In the design process of the kiln, the material properties and usage requirements of various materials are considered, and the usage position and thickness of the materials are calculated. In order to ensure the construction quality, the use position and amount of materials shall not be arbitrarily changed during the construction process, nor the variety and quality grade of the materials used.

If it is to be replaced, the strength grade of the structural material must be higher than that of the original design material, and the thermal conductivity of the insulation material to be replaced must be lower than that of the original material.

2. Construction according to design requirements.

In the process of using the tunnel kiln, the technical requirements that should be met in the construction process, the construction difficulty and the solutions are fully considered. Many norms and standards are used in the design, including national standards and norms, provincial and ministerial-level standards and norms, local-level standards and norms, and industry standards and norms.

In the construction requirements, specific requirements are put forward for each part. These requirements are in line with the requirements of the construction specifications and standards. If you want to change them, you must refer to the corresponding items of the specifications and standards, and make changes according to the requirements of the specifications and standards. Change.

Problems and lessons in tunnel kiln construction

As we all know, there are three principles to produce good fired bricks: сырье – это основа, kiln equipment is the key, and management is the foundation. If it is not designed, the materials used are inferior, and the construction is arbitrarily commissioned, the kiln will become the biggest obstacle to the sustainable development of the production enterprise. There are the following fatal problems in the reconstruction and new construction of tunnel kilns, which should be paid great attention by colleagues in the whole industry:

1. The furnace design is unreasonable

Some enterprises do not pay attention to the process design of sintering kilns. There are generally simple kiln structures, unscientific drying kiln structures, and unreasonable air duct design, so that various tunnel kilns of different lengths appear in front of us. In order to meet the owner’s blind request to reduce the cost, many tunnel kilns are overweight and weak.

2. Most construction teams are unqualified, and the construction quality is worrying

В настоящее время одной из самых серьезных проблем является произвольное поручение строительства блоков без квалификации в области строительства печей.. У них отсутствует необходимая профессиональная подготовка и квалификационная аттестация строительного персонала..