Low-NOx grate-rotary kiln pellet production technology and low-NOx grate-rotary kiln pellet production system
A technology of production process and production system, applied in the fields of environmental protection and pellet production, can solve the problems of substandard discharge, expensive denitration device, reduction of thermal NOx, etc.
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Embodiment 1
[0109] like Figure 5 shown, a chain grate-rotary kiln pellet with low NO x Production system, the system includes: chain grate machine 1, rotary kiln 2, ring cooler C. Wherein: according to the process trend, the chain grate machine 1 is sequentially provided with a blast drying section UDD, a suction drying section DDD, a preheating section TPH and a preheating second section PH. The ring cooler C is sequentially provided with a first ring cooling section C1, a second ring cooling section C2 and a third ring cooling section C3. The tail end of the rotary kiln 2 is connected to the second preheating stage PH of the chain grate 1 and the other end is connected to the annular cooling stage C1 of the annular cooler C.
[0110] Wherein: the air outlet C1b of the first stage C1 of annular cooling is connected to the air inlet 201 of the rotary kiln 2 through the first pipeline L1. The air outlet 202 of the rotary kiln 2 is connected to the air inlet 301 of the preheating second...
Embodiment 2
[0115] like Image 6 As shown, Example 1 is repeated except that a branch is branched from the eighth pipeline L8, which is the ninth pipeline L9. The ninth pipe L9 is connected to the air inlet C3a of the third annular cooling section C3. A reducing agent injection device 5 is arranged in the bottom bellows of the third stage C3 of the ring cooling.
Embodiment 3
[0117] like Figure 7 As shown, Example 2 is repeated, except that in the preheating section of TPH, a preheating section burner 4 is arranged above the surface of the green pellets. In the preheating second stage PH, there is a preheating stage burner 4 located above the raw material surface.
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