Drying kiln of fibre products

Abstract

The invention discloses a drying kiln of fibre products. In the drying kiln, the kiln body (1) of the drying kiln is provided with a kiln end wall intake chamber (4) and a kiln bottom intake chamber (5) which are communicated with each other; the other end of the kiln body (1) of the drying kiln oppositely to the kiln end wall intake chamber (4) is provided with a kiln end wall exhaust chamber (6); uniform ventilating slits or air vents are arranged in each air chamber towards fibre products in the kiln; the kiln body (1) is communicated with a heat exchanger (3) realizing residual heat utilization; and an automatic control system capable of automatically controlling the degree of drying, temperature and humidity of fibre products is arranged in the drying kiln. The indexes of the drying kiln of fibre products which is built by adopting the above technical scheme are as follows: the temperature difference in the drying kiln is + / -3 DEG C, the humidity is controlled to 70-5%, the temperature is controlled to 30-120 DEG C, and the drying kiln is characterized by automatic control of degree of drying, uniform kiln temperature and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of drying fiber products, and in particular relates to a drying kiln for fiber products. Background technique [0002] Refractory fiber products produced by wet method contain a lot of water and organic and inorganic binders, which need to be dried, cured and shaped by heating. The fiber product drying kilns currently on the market use electric heating direct heating drying kilns or hot air drying kilns. [0003] The electric heating direct heating drying kiln arranges the electric heating elements on two / or three walls of the drying kiln, and heats and dries the fiber products through the thermal radiation generated by the heating after the electric heating elements are energized. [0004] The hot air drying kiln uses electric heating to generate hot air, which is introduced into the drying kiln by a fan to heat and dry fiber products. [0005] The use of electric heating direct heating drying kiln and ho...

AI Technical Summary

Problems solved by technology

This will cause carbonization of the organic binder in the fiber products near the heating element around the kiln, and the color will turn yellow or burnt black, reducing the commercial value of the product

If the temperature of the electric heating element is reduced to ensure the drying quality of fiber products, the temperature of the center of the drying kiln will also be reduced accordingly. To dry the fiber products, the drying time must be extended, and the drying and production cycle must be prolonged.

[0007] 2. The hot air drying kiln relies on the hot air generated by the electric heating hot air stove, and introduces the fan into the drying kiln to heat and dry the fiber products, which better solves the problem mentioned in the previous paragraph. The end of the kiln is dried, and the hot air vent is on the top of the kiln. In this way, the hot air blown in cannot be guaranteed to be evenly distributed to every corner of the cubic furnace cavity, and it is discharged from the bypass to take a shortcut, resulting in various temperature zones in the drying kiln. temperature difference

It will cause the fiber products in the kiln near the air duct to dry quickly, and some dead corners where the hot air cannot blow to the fiber products will dry slowly, and the drying degree of the fiber products will vary, which will affect the quality of the fiber products.

If in order to ensure the drying quality of fiber products, it is necessary to prolong the drying time and prolong the drying and production cycle.

[0008] 3. Both the electric heating direct heating drying kiln and the hot air drying kiln are equipped with a dehumidification fan. Its function is to directly discharge the humid air generated in the kiln to the outside of the furnace. The heat is taken away, causing a large amount of heat energy loss

[0011] The first method requires long-term accumulation of experience in judging the drying of fiber products, and it is only applicable to products of a single specification. It cannot be judged for simultaneous drying of multiple specifications and models, so only the second judgment method is used; moreover, different operations There is also a large difference in judgment

This undoubtedly increases the uncertainty and uncontrollability of the drying process of fiber products, affects the quality of fiber products, and will also increase energy consumption

[0012] The second method is to control the drying degree of fiber products more accurately, but every time the kiln door is opened to take samples and set out, the heating must be stopped, and the temperature in the kiln will correspondingly drop to a hand feeling that can be operated by humans before weighing can be performed. Repeat the operation several times Can cause increased energy consumption and lengthen drying and production cycles

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