Calculation Method of Air Leakage Rate of Air Preheater of Boiler Co-fired with Pulverized Coal and Blast Furnace Gas
A technology of air preheater and blast furnace gas, which is applied in the direction of instruments, calculations, special data processing applications, etc., and can solve the problems of deviation from the real value, loss of validity, complexity, etc.
Active Publication Date: 2017-08-25
HUATIAN ENG & TECH CORP MCC
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However, this method is an empirical method deduced for conventional coal-fired boilers, which is suitable for conventional coal-fired boilers, but not suitable for co-fired boilers with pulverized coal and blast furnace gas (this is mainly because the fuel composition of blast furnace gas is very different from coal. There is a big difference, which leads to the solution process of the air leakage rate of the air preheater of the pulverized coal and blast furnace gas co-fired boiler is very different from the conventional coal-fired boiler, which is much more complicated than the conventional boiler), if the method in the national standard GB10184-88 is still applied, it will inevitably Will cause the results to deviate greatly from the true value, thus losing validity
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[0047] The present invention will be further described below in conjunction with the accompanying drawings.
[0048] The concrete steps of the method for measuring and calculating the air leakage rate of the air preheater of the boiler air preheater co-fired with pulverized coal and blast furnace gas of the present invention are as follows:
[0049] 1. Obtain the basic data required for the calculation of the air preheater of the pulverized coal and blast furnace gas co-fired boiler through instrument measurement and sampling analysis. The basic data specifically includes:
[0050] Coal Composition Data
[0051]Carry out raw coal sampling and coal powder sampling on the coal feeder and the powder sampling pipe respectively, and then carry out laboratory analysis and calculation processing to obtain the coal composition data, the coal composition data includes the industrial analysis data and elemental analysis data ; Wherein said coal-fired received base industrial analysis d...
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The invention discloses a method for measuring and calculating the air leakage rate of an air preheater of a boiler mixed with pulverized coal and blast furnace gas, which is mainly designed for accurately calculating the air leakage rate of the air preheater of a boiler mixed with pulverized coal and blast furnace gas. The method for measuring and calculating the air leakage rate of the air preheater of the coal pulverized and blast furnace gas co-fired boiler of the present invention includes obtaining the basic data required for calculating the air leakage rate; obtaining the blast furnace gas density under the standard state; converting the blast furnace gas composition data into Receive the composition data represented by the percentage of the base mass content; obtain the characteristic data of the mixed fuel; obtain the theoretical dry air volume required for the combustion of the unit mass of the mixed fuel, the actual dry flue gas volume corresponding to the inlet and outlet of the air preheater, and The excess air coefficient at the inlet and outlet of the air preheater and the air leakage rate of the air preheater for the co-fired boiler of pulverized coal and blast furnace gas respectively. The invention can accurately analyze and calculate the air leakage rate of the air preheater of the pulverized coal and blast furnace gas co-fired boiler.
Description
technical field [0001] The invention relates to the boiler field of thermal engineering, in particular to a method for measuring and calculating the air leakage rate of an air preheater of a boiler co-fired with pulverized coal and blast furnace gas. Background technique [0002] Iron and steel enterprises produce a large amount of by-product gas during the smelting process, including blast furnace gas, coke oven gas and converter gas. Among them, the output of blast furnace gas is the largest, and each 1t of pig iron smelted can produce 3500-4000m3 3 blast furnace gas. Non-combustible components in blast furnace gas (including N 2 and CO 2 ) content as high as about 80%, resulting in the low calorific value of blast furnace gas, non-combustible and other shortcomings, resulting in insufficient utilization of blast furnace gas in many iron and steel plants. How to make good use of the by-product blast furnace gas resources in the iron and steel production process is a com...
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IPC IPC(8): G06F19/00
Inventor 江文豪姚群
Owner HUATIAN ENG & TECH CORP MCC