1 Fixed or adjustable gas orifice, primary air shutter and mounting boss. Heavy cast iron construction. Simple to install and to maintain.

2 The mixing point of primary air and secondary air of burner is a key parameter for the flame stabilization of fuel.

3 The primary air flow field of a swirling burner has important significance to stabilizing combustion.

4 The concentration distribution of pulverized coal in primary air pipe is very important for advancing efficiency of boiler.

5 Primary air control is important to CFB unit running stabilization.

6 At the same time,[] the primary air system was monitored on - line.

7 The primary air to boiler is very important for safe and economic operation.

8 Simulation results agree well with experimental dataThe primary air amount and its temperature are also investigated.

9 The effects of the louver structure parameters, the feed concentration and the primary air velocity on the concentrated ratio (RC) were studied by the gas solid two-phase flow experiments.

10 The main influence factors of corn stalk combustion in a fixed bed are corn stalk length, air preheating, the primary air flow rate and fuel moisture.

11 It was solved by increasing the oxygen volume, opening wide the grading air damper, lowering speed of the primary air.

12 The result shows that the impact of the nozzle size is more obvious than that of the primary air rate.

13 Stable coal transportation and kiln thermal condition is achieved by increasing primary air rate, improving inventory and modifying screw clearance of the screw pump.

14 Exhaust emission of vehicle engines is one of the primary air pollution sources.

15 The NOx emission is high along with the great of primary air rate.

16 The test shows that size distribution of feeding coal, volatile content and its release as well as the total air rate and primary air ratio will influence the post combustion in CFB boiler.

17 The paper research completely deep present consuming energy to Primary air fan-coil unit system, Path and method of energy saving was systematically brought forward.

18 In a cold model the author uses Particle Dynamic Analyzer(PDA) to study the concentration enrichment and diffusion processes when there is a bluff body near the primary air exit.