Heat treatment furnace is as follows to the requirement of burner:
(Side of 1) adjustment performance, heat treatment craft stipulates workpiece heats have longer thermal insulation period, the thermic load of heat preservation period is less than far warm up period, differ to arrive severalfold ten times, when the bear of such bigger change, ask burner also can be used normally, criterion burner should have bigger adjustment to compare, compare to oily adjustment amount to 1:8, good to gas burner be more than 1:10. The high-pressured eject formula that such requirement used in the past is gas burner is short of, its adjustment is compared have 1:3 only.
When heat treatment furnace uses reducing atmosphere, the requirement uses up the burner inside the range with coefficient wider variation to also can achieve stable combustion in air, have atmosphere adjustment capacity namely. To come true self-adjusting, burner contains automatic ignition and blaze monitoring and warning device.
(2) improves aspect of furnace temperature uniformity, strengthen furnace to enrage a loop, high speed burner is ejective speed exceeds 100m/s, churn in this air current below, difference in temperature of whole the chamber of a stove or furnace is reduced, below the furnace temperature of 500〜75O ℃ , 5 ℃ of ± of difference in temperature, below 750〜1000 ℃ furnace temperature, 10 ℃ of ± of difference in temperature.
Drop blaze temperature, Zuo fast burner uses the method that changes wind quantity 2 times, can get the even furnace temperature under gas ignition temperature. Low amount to 200 ℃ .
Avoid local overheat, smooth blaze burner can gain even radiant face, it is to heat treatment of plank, strip appropriate.
To used the more than heat of flue gas to appear oneself warm-up burner and the radiate that take intake air heater are in charge of, it is burner and union of intake air heater an organic whole, reclaim not only flue gas beyond is hot, flue simplifies in the meantime.
2. Heat means
Heat treatment furnace heats means has heat directly and heat secondhand two kinds heat means. , kind inside fuel furnace, the products of combustion of high temperature is all round workpiece be heatinged, heat T of the meeting in the process is the same as degree occurrence oxidation and decarbonization. Oxidize to allowing and the workpiece of decarbonization is to use heat secondhand means, this means has two kinds of methods: Front row, use work cover hood or case mount, flue gas is outside the cover or heat outside box, can use bell furnace or batch-type furnace. The 2nd, heat source (blaze or electric heat body) with radiation tubal cover rises, the control atmosphere of a need is known all round workpiece. Heated to receive very big promotion application on production secondhand.
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