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Sacmi introduced the latest generation of roller hearth kiln
- Published: 3 Jun 2009 03:41:10
- Decades, ceramic machinery manufacturers have been requested to upgrade existing machinery and equipment, design and manufacture of more efficient equipment, more rational, reason why is because ever-increasing energy costs, and increasingly stringent environmental protection laws and regulations.
Today, there are a variety of thermal equipment to improve (such as kilns and dryers) the possibility of energy efficiency solutions, ceramic machinery and whole plant designers for some time have been efforts in this direction, the diversification of the technical program, cooling system, such as recycling of hot air as the burner's combustion air: In accordance with the current fuel costs, especially taking into account the future cost of fuel, which is a substantial savings to ensure that solution.
In addition, with the flue gas emitted into the chimney of the heat could be recovered and recycled to the spray-drying tower, or through a recirculation system suitable for use in other thermal equipment, such as dryers.
1. To re-use part of the cooling air, transported to the furnace burner to save fuel.
2. Re-use through the flue and the kiln cooling zone part of the heat loss, transmitted to the spray-drying tower and the hot stove or dryer after the compressor.
Talking about this kind of roller hearth kiln for thermal equipment, reduce power consumption of the most convenient way is to reduce the combustion air into the burner, thereby reducing the unit weight of gas products, while reducing emissions of heat loss to the flue
Waste heat recovery system
With time, Sacmi improved energy-saving waste heat recovery system, according to re-use emissions through the chimney wind cooling the heat contained in the size of the furnace compared with the traditional proportion of its energy is different.
BSR Systems
Extracted from the external environment temperature around 30 ℃ of combustion air through a heat exchanger located in the quench zone to about 100 ℃ temperature transmitted to the burner. Take away the heat in the quench zone, the heat exchanger to reduce the cooling required for ceramic tile air volume. Energy-saving rate of 4%.
MDR system
Ease of use of the cold zone and hot air emitted from the flue end of the cold zone as part of hot air used for combustion air. These hot air filtered through an appropriate transfer to the quench zone heat exchanger. In this case, the supply of the combustion burner temperature is approximately 150-160 ℃. Energy-saving rate of about 8%.
SPR system
SPR system will alleviate the cold furnace and the end of the cold zone is divided into two parts exhaust flue. The hottest end of the cold area from the air and relieve cold zones hot air by the filter area after the transfer to the quench heat exchanger. In this case, the supply of the combustion burner temperature is approximately 200-220 ℃. Energy-saving rate of 12%.
Control of Pollution
Sacmi equipment and processes to understand the formation of the different pollutants, and to propose feasible solutions.
Process
Adopted as a result of combustion processes, the production of ceramic tiles in all thermal equipment (spray-drying tower, dryer, furnace) on the formation of pollutants have a direct impact.
However, due to different temperatures and different types of processes, by different pollutants generated by the equipment of the number of completely different.
Major pollutants (depending on the burner) is the nitrogen oxides (NOx).
When using non-gas fuels (such as liquefied petroleum gas, poor gas, etc.), it can detect carbon monoxide (CO) and sulfur oxides (SOx).
Products
The maximum amount of pollutants generated from the production process of raw materials used, such as clay, glaze, additives and so on ... ... fluorine, chlorine, sulfur, dust, etc. generated from the general body composition, and carbon monoxide, SOV (volatile organic compounds ) ammonia, lead from the glaze, etc. have.
Sacmi furnace chimney in the detection of nitrogen oxides Nox below the normal range 100mg/Nm 3, while the value of international standards is lower than 350mg/Nm 3. European standards require that nitrogen oxide <200mg/Nm 3.
In order to achieve international standards acceptable to such a low value of the nitrogen oxides, Sacmi developed a use of "sub-combustion" technology a new type of burner.
Sacmi special burner design allows gas and combustion air will be two sub-mixing, silicon carbide tube to maintain a low flame temperature.
Furnace atmosphere achieved by the quenching effect of "frozen" the formation of nitrogen oxides, so as to reach the low to detect.
Sacmi furnace chimney in the detection of nitrogen oxides to the typical average is: <90mg nitrogen oxides / m emission standard.
