CN102384652A - High-heat storage strong-radiation furnace-building liner material and heating furnace kiln thereof - Google Patents

Abstract

The invention relates to a high-heat storage strong-radiation furnace-building liner material and a heating furnace kiln thereof. The invention discloses a novel high-heat storage refractory material which is used for increasing a heat storage function of the refractory material in a furnace by adopting two methods of adding a heat-storage additive in micropores. Compared with the traditional refractory material, the high-heat storage strong-radiation furnace-building liner material has the advantage of increasing the temperature in the furnace to reach about 100 DEG C. The high-heat storage strong-radiation furnace-building liner material is made into common square brick materials, and can also be made into a cavity-shaped special prefabricated members by adopting the principle of thermally processing an upper cavity for generating heat radiation, and is arranged on a furnace wall with a normal line aligned to a heated body to form infrared orientated emission. According to the invention, the combustion efficiency, the heat exchange efficiency and the heat balance efficiency are increased, the comprehensive heat efficiency is increased by about 10 percent, and the energy is saved by 12-20 percent.

Description

High accumulation of heat intense radiation brickwork inner lining material and heating stove thereof

Technical field

The industrial heating furnace kiln that the present invention relates to the brickwork inner lining material and use this material to build up is applicable to industrial furnaces such as heat-treatment furnace, forge furnace, heater for rolling steel, ceramic kiln, cell furnace, boiler.

Background technology

In order to improve the thermal efficiency of industrial heating furnace kiln, the method that conventional art generally adopts:

(1) adopts light-duty furnace building material, strengthen thermal insulation, reduce heat loss;

(2) be coated with the high emissivity coating at inboard wall of burner hearth, in order to increase radiation intensity;

(3) improve furnace wall heat radiation area, in order to increase total radiation;

What (four) occurred in recent years carries the black matrix furnace building material, and this technology has solved emissivity and directional transmissions problem in the cavity.This technology has only solved the very little part of the burner hearth gross area, does not make whole burner hearth interior wall all bring up to 0.96 emissivity.

Summary of the invention

To the deficiency of above technology, the dual way that the present invention adopts micropore to add the heat accumulation additive increases the heat accumulation function of whole refractory material, forms brand-new high thermal storage refractory; This material makes in the stove temperature improve about 100 ℃ than former refractory material; The present invention also adopts hot-working upper plenum heat radiation principle except that making common cubic brick type material, material is made the special-shaped prefabricated component of cavity shape; And be installed on the furnace wall position of normal over against heated body, form ultrared directional transmissions.

The thermal efficiency of industrial heating furnace is an overall target, and it is made up of efficiency of combustion, heat transfer efficiency and thermal balance efficient three parts.

When investigating the heating furnace efficiency of combustion, most just from definition be conceived to the to burn ratio of real reaction heat and theoretical reaction heat, and from the angle examination burning velocity problem of burn rate.The present invention is through the actual temperature of the inner lining material of raising heating furnace, thereby the gap of dwindling furnace wall and flame kernel temperature has improved the mean temperature in the burner hearth.According to Ali Ni Wusi law: 10 ℃ of the every raisings of the environment temperature of substance reaction, its reaction speed increases by 1～2 times.The stove fuel combustion speeds up, and the total amount of heat that discharges in the unit interval increases, and that is to say that the heat that can supply with heated body is more.Make the raising of common cubic type refractory brick Yin Wendu simultaneously; Strengthened thermal radiation capability; And different in nature radiant body external form is taken from the standard industry black matrix, cavity size L: R=1: 3～1: 7, owing to adopt the cavity radiation principle to make emissivity reach maximum ε=0.96; Again because the increase of surface area has strengthened swept area.And realized ultrared directional transmissions.Make heated body obtain more heat.Learnt that by law of conservation of energy the heat that heated body obtains is many more, its exhaust emissions temperature is low more.So far, three parts of the thermal efficiency, efficiency of combustion, heat exchange efficiency and thermal balance efficient all are improved, and also make integrated heat efficiency be improved about 10%.The fractional energy savings of fuel is 12-20%.

Accelerate the burn rate of fuel in the industrial furnace through this The Application of Technology, improved average furnace temperature; Strengthen thermal exposure and reached directed radiation; These have all shortened the heating-up time of heated body, thereby have improved thermal efficiency of heating furnace, reach fuel-saving purpose.

Technical characterstic: patent art of the present invention adopts cubic brick type or material is made the special-shaped prefabricated component of cavity shape; Its cavity is 1: 3～1: 7 than L/R; The dual way that adopts micropore to add the heat accumulation additive increases the heat accumulation function of whole refractory material; General object all has certain albedo, and its reflectivity and absorptivity are all relevant less than the penetration depth d of the absorption index k of 1. objects and its radiated wave, and both relations are:

$d=\frac{{\mathrm{\λ}}_0}{4\mathrm{\πk}}$

Wherein, So λ is a light wavelength in the vacuum. the penetration depth that improves radiated wave can reduce the absorption index of object; Thereby improve the emissivity of object, penetrating of radiated wave is relevant with the compactness extent on the microcosmic with the kind of material. different materials has penetration depth inequality.Calculating can get its absorption index k → 0 according to following formula, penetration depth d → ∞, thus the emissivity of object can have a very significant increase, if the refraction coefficient n=1 of object can reach black matrix at this moment.Can find out that from formula the penetration depth of object is suitable with the wavelength of radiated wave, and the penetration depth d of absolute black body → ∞; This is tending towards infinitely great with regard to the macro-size that requires black matrix; So absolute black body is non-existent, in fact object is under the situation of refraction coefficient n=1, as long as absorption index k＜0.001; At this moment the emissivity of object is very near black matrix; And this moment radiated wave penetration depth still very little, for the thermal radiation that wave-length coverage is 0.76～20 μ m, the penetration depth of its radiated wave is respectively 60.5 μ m and 1591.5 μ m. in addition; Loosely organized material also can reduce the refraction coefficient of material, can further reach the effect that improves emissivity.

The dual way that patent art adopts micropore to add the heat accumulation additive solves the emissivity of material, makes it reach 0.96 and no matter on macroscopic view can explain still that from microcosmic it can improve the emissivity of object effectively, thereby reach energy-saving and cost-reducing effect.

The present invention contrasts prior art and has following advantage:

1, yields faster results and bigger economic returns and call for smaller investment;

2, be widely used, be suitable for all kilns;

3, the thermal efficiency is high, energy-saving and cost-reducing high efficiency;

Description of drawings: different in nature radiant body shape and size.

Claims (3)

1. one kind high accumulation of heat brickwork inner lining material heating stove is characterized in that: furnace building material adopts the dual structure of micropore and heat accumulation additive;

2. high accumulation of heat brickwork inner lining material heating stove according to claim 1, it is characterized in that: furnace building material is the special-shaped prefabricated component of cubic brick type and cavity shape, and its cavity is 1: 3～1: 7 than L/R;

3. high accumulation of heat brickwork inner lining material heating stove according to claim 1 is characterized in that: the special-shaped prefabricated component of cavity shape, be installed on the furnace wall position of normal over against heated body, and form ultrared directional transmissions.

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