The self-limiting temperature sheet veneer ash hopper heater is a new type of electric heating product developed by our company to meet the needs of heating and heat preservation of the dust hopper in the power industry. It can ensure automatic control of the specified temperature for a long time to prevent dust and moisture condensation, dust accumulation, and obstruction of smooth flow. The method adopts heating of the outer wall of the ash hopper to supplement the temperature difference of the outer wall of the ash hopper to achieve the purpose of dehumidification and smooth flow.
The traditional electric heating wire plate heater does not have the function of automatically adjusting the heating temperature, and completely relies on the temperature control meter to control the heating temperature. When the temperature control meter fails, it is prone to overheating and overheating. When the temperature drop needs compensation, the temperature compensation speed is slower. Its typical shortcomings are short service life, high energy consumption, and high maintenance costs.
The self-limiting temperature sheet veneer ash hopper heater uses a new generation of ceramic materials with excellent electrical heating characteristics as the heating element. When the voltage is applied to the ceramic heating body to increase the temperature, the resistivity of the ceramic heating element in the cold state is very low. When the current is large, the electric heater heats up quickly; when the temperature reaches the set switching temperature, the resistivity of the ceramic heating element increases sharply, causing the current to drop to a stable value. At this time, the power consumption is all diffused into the ash hopper wall. To achieve the purpose of automatic constant temperature and energy saving.
1. Long service life
Due to the use of ceramic heating materials with automatic constant temperature characteristics and insulating and temperature resistant materials with excellent anti-aging properties, coupled with advanced structural design, its normal service life is as long as 5 to 10 years.
2. Safe and reliable
The ceramic heating element material has no open flame and does not consume oxygen when heating, and its production formula has fixed a constant temperature point, which can remain unchanged for life. Its failure mode will not be reflected in out of control over temperature or fusing, and it is safe and reliable in use.
3. Save energy
The ceramic heating element material itself has a high heat conversion rate, and because of the characteristics of automatic constant temperature, when the thermal load changes, the power can be quickly increased or decreased. That is, when the heat load increases, the lost heat can be quickly compensated, and the dehumidification and dust removal effect will not be affected by the increase of the heat load; especially when the heat load is reduced, the power consumption is only used to maintain the temperature of the ash hopper wall, which saves energy. It's very obvious.
4. Heating evenly
Each ash hopper is equipped with several sets of automatic constant temperature electric heater units, which are evenly distributed on the outer wall of the ash hopper. The total power is 5-20KW/bucket. The power supply method is a three-phase four-wire system to ensure three-phase electrical balance.
5. Strong voltage adaptability
Due to the volt-ampere characteristics of this material, the ceramic heating element can still maintain a constant temperature when the power supply voltage fluctuates within a certain range (25%), which is a feature that ordinary heating wire materials do not have.
6. Rapid heating
The special current-time characteristics of the ceramic heating element determine the extremely fast heating speed, which is far beyond the reach of the heating wire material. ’
7. Easy to install
The self-limiting temperature sheet veneer ash hopper heater is installed on the outer wall of the ash hopper with temperature-resistant thermal conductive glue and protective tape, which is simple to run out and easy to maintain.