Essential qualities of a good boiler
The essentials of a good boiler :-
(i) The boiler should be reliable and produce the required amount of steam per hour.
(ii) The maintenance of the boiler should be easy and cheap.
(iii) It should be efficient. It should have minimum fuel consumption and less initial cost.
(iv) It should start quickly.
(v) It should be light in weight, occupy less space and it should be able to meet the variable demand of steam.
(vi) The joints should be leak proof. The joints should be accesible for inspection and these should be away from flame.
(vii) The mud and other deposits should not collect on heated surface since this would affect the heat transfer rates and consequently the steam generation rates.
(viii) The refractory material used should be minimum.
(ix) The design of boiler allow maximum fluid velocity in order to increase the heat transfer rates between water and flue gases. It should have minimum friction losses.
(x) It should comply with safety regulations according to Indian Boiler Act 1923.
(i) Highest thermal efficiency (ii) Highest operational safety (iii) Low emission of carbon monoxide,NOx and SOx in flue gases (iv) Low free carbon emission (black smoke)in flue gas. (v) optimum vacuum in economiser. (vi) Lesser requirement of soot blowing (vi) Effective heat recovery from flue gas for heating : boiler feed water, primary air to combustion chamber and fuel oil. (vii) less requirement of blow down
The essentials of a good boiler :-
(i) The boiler should be reliable and produce the required amount of steam per hour.
(ii) The maintenance of the boiler should be easy and cheap.
(iii) It should be efficient. It should have minimum fuel consumption and less initial cost.
(iv) It should start quickly.
(v) It should be light in weight, occupy less space and it should be able to meet the variable demand of steam.
(vi) The joints should be leak proof. The joints should be accesible for inspection and these should be away from flame.
(vii) The mud and other deposits should not collect on heated surface since this would affect the heat transfer rates and consequently the steam generation rates.
(viii) The refractory material used should be minimum.
(ix) The design of boiler allow maximum fluid velocity in order to increase the heat transfer rates between water and flue gases. It should have minimum friction losses.
(x) It should comply with safety regulations according to Indian Boiler Act 1923.
Most solid fuel boiler are designed to operate under a negative furnace draft to the extend of -2 to -5 mm wc.Thin draft is critical both from the maintenance of proper combustion and ensuring safe and efficient operation of the boiler.
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