10 ways to save energy in electric ovens

1. Systematic control of the temperature of the insulation electric oven, by checking the temperature of the cover of the outer wall at a stationary temperature of the oven with subsequent removal of insulation defects. this gives energy savings of up to 30%.

2. Improving the tightness of electric furnaces, removing leaks in cargo doors, openings for thermocouples, masonry, etc. Assembly of asbestos sieves according to the dimensions of processed products in methodical ovens.

An illustration of the loss of any holes and leaks are the average radiation losses of 1 m2 of the hole at different temperatures in an electric oven:

Furnace temperature, gr. C (losses in the furnace per 1 m2 opening, kW) — 600 (17), 700 (26), 800 (36), 900 (55).

A pedal device for opening the lid of the oven when taking a portion of molten metal on electric melting furnaces for melting aluminum and other light metals, which provides a reduction in the time «Harmful» opening of the lids, and hence the associated heat losses.

3.Painting the housing of electric furnaces with aluminum paint, which will give energy savings up to 4 - 6% of the value of heat losses.

4. Maximum use of the working volume of the electric furnace for due to dense masonry of identical parts, joint processing of different parts, improvement of the design of charging devices, proper distribution of parts by shape and size between the electric furnaces in order to ensure the maximum mass of the cell.

The use of electric furnaces with a load below 70% of their passport power supply is prohibited. The listed measures ensure a reduction of specific energy consumption for heat treatment and an increase in the productivity of ovens.

5. Application of automatic temperature control electric ovens. Reduction of electricity consumption for heat production while it is happening up to 25%.

6. Application of electric furnaces with variable work volume (with movable arch). To change the working volume of the furnace depending on the quantity of processed products, the roof of the furnace is movable.

The vault is moved by a specially adapted winch. This achieves electricity savings of up to 25% and a reduction of up to 40% in the initial heating time of the blown vault furnace.

7. Reducing the weight and size of the electric oven charging container. Lightened baskets, boxes and other cargo containers through size reduction and design improvements. The mass of the cargo container must not exceed 10% of the weight of the entire cage. In this way, electricity consumption is reduced by 10-15% per 1 ton of products processed in an electric furnace.

8. Drying products with infrared rays.The infrared lamp system is built into an oven or other device, the size and configuration of which depends on the production needs. The method of drying with infrared rays (especially for paints and varnishes) has a significant advantage over the conventional drying method, because infrared rays, penetrating through the layers of paint, heat the surface of the product. Thus, the drying process starts from the lower layers of the coating, which significantly reduces the drying time and improves the quality of the painted surface. At the same time, energy savings reach 30-40%.

9. The use of heating saltpeter, salt, oil and other baths with tubular heating elements lowered directly into the heated medium, instead of heating the baths with nichrome spirals placed in the lining of the outer walls of the baths. This gives energy savings of up to 40%.

ten. Improvement of the mode of use of high-frequency heating elements due to:

a) the use of multipoint inductors. In this case, the processing parts are produced simultaneously in several places and energy savings reach 35 — 40%,

b) the use of centralized supply of hardening machines (possibly only when the length of the high-frequency network is not more than 200-300 m, from the increase in length causes large losses of electricity). In this case, automatic control of the machines is necessary, since the operation of each machine must be coordinated with the operation of the others powered by this generator. Saving electricity reaches 60%,

(c) the use of multi-station curing machines. In this case, two inductors are installed on the machine with a separate power supply from them with a high-frequency current.During part processing, the first inductor is preset details for the second. Energy savings are achieved by reducing operating time.