The heat exchanger that heat up a canal reachs industrial kiln furnace in industrial boiler (smelting furnace) medium application

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One, the uses boiler of our country industry moving efficiency that tubal heat exchanger heats up in industrial boiler is general and inferior, compare design efficiency low 8~10% normally, main reason is smoke evacuation temperature tall, excessive air coefficient is too big, grey broken bits contains carbon the quantity is exorbitant; Have boiler of a kind of small-sized industry additionally, basically be the small boiler that shows H of capacity 2t ／ is the following, the rear did not set heating surface, smoke evacuation temperature is higher, but 250 ℃ . Accordingly, use the heat exchanger that heat up a canal to reclaim flue gas beyond is hot, drop smoke evacuation temperature in order to improve boiler efficiency, have very good perspective. 1, outside heating up those who be in charge of heat exchanger and groovy heat exchanger to match to do not have caudal heating surface besides small-sized industry boiler, shape of rear of boiler of most small-sized industry has cast-iron economizer, rear of large industry boiler reachs intake air heater of steel tube air of steel tube economizer. When with convention heat exchanger is applying, the heat exchanger that heat up a canal can match together, they have a characteristic each. For example cast-iron economizer application is wide, its advantage is: Durable, bear pressure (water supply pump can be installed in economizer entrance) , the price is low; Defect is: Big, over all dimension blocks weight up more greatly, easily grey, structure is complex (by costal region piece canal and cast-iron bend join and become) . The economizer that heat up a canal is able to bear or endure it is good that microtherm corrodes function, below condition of temperature of same flue gas, the wall is lukewarm taller, structure compact, bulk small, weight is light, obstruction of flue gas side can be designed lesserly; Its defect is: The price is higher, normally water side is often press. Cast-iron economizer and hot tube economizer are to have actor drawback each, if be the boiler that does not have economizer so, we advocate installation heats up tubal economizer; If be the boiler that already had cast-iron economizer so, we advocate installation heats up tubal heat exchanger (air intake air heater or economizer) , with already cast-iron economizer matchs use, and do not demolish like that iron economizer, specific application form decides according to actual condition. We leave air intake air heater alone to be in especially like that after iron economizer, it suits to be used at having like that the small-sized industry boiler of iron economizer is transformed. To the industrial boiler of above of 4t ／ H, the rear already reached intake air heater of steel tube air of steel tube economizer, if smoke evacuation temperature is more than,heat exchanger of the canal that hold heat can be being added ever since when 180 ℃ . 2, characteristic of the heat exchanger that heat up a canal is angry -- the gas heat exchanger that heat up a canal heats up tubal air intake air heater to apply in industrial boiler namely, but in body of cold thermal current two side decorate costal region piece, hot industry performance is good, the structure is compact, can reflect the advantage that gives the heat exchanger that heat up a canal most. Gas -- the water heat exchanger that heat up a canal heats up tubal economizer to apply in industrial boiler namely, its main good point is to be able to bear or endure it is good that microtherm corrodes function, because it is in,the thermal resistance of water side is compared cast-iron or smoke canal economizer is big, and after its thermal resistance in gas side is compared both for small, fall in similar requirement so, the wall is lukewarm taller, not easy corrupt corrode and block ash up; Like that iron economizer is perishable corrode blocks ash up. 3, the boiled water that heat up a canal implement applied heat runs boiled water implement the structure is unique, bulk is compact, not big heat exchange is measured, for example 9.

Scold of H) of ／ of 104Kcal of × of H(2 of ／ of 36 × 104KJ feeds the demand that worker of plant entire plant waters under 2000 people. Also can design boiled water -- the form with amphibious hot water, when supplying boiled water, cold water is entered automatically, boiled water is poured out of automatically, when needing to supply boiled water, change to another exit, supply hot water namely. Because heat up tubal boiled water implement heat exchange amount is not large, general all the economizer with all sorts of type or all sorts of model the air that leave beforehand Zhi implement combination is together. 4, all sorts of combination device are in industrial boiler, assorted device often is used when more than heat reclaims, before already was like, narrate. Our most commonly used in promotion means is to heat at the same time the means of air and water, it has clear advantage: Use hot air costal region to light pair of improvement to catch fire reach combustion to have very big gain, hot air temperature need not exorbitant, be more than 50 ℃ to be able to see the effect; In addition, hot water eats boiler or be hot water applying for giving birth to an activity also is plant institute of pressing requirement. Use the very good program in combined-type heat exchanger, substantially half heats up a canal to be used at heating air, hot a person engaged in some particular pursuit of other in part is used at heating hot water, gas, gas and gas, the combination of water has paralell connection and series two kinds. 2, industrial kiln furnace (smelting furnace) in the furnace of applied industry kiln of the heat exchanger that heat up a canal (smelting furnace) it is bad news can large family, and the sort of kiln furnace is very various, the average level of thermal efficiency country of furnace is the half of foreign advanced level, add up to year coal of bad news standard more than 100000000 tons, have very large energy-saving latent capacity, temperature of its smoke evacuation is higher, often exceed 300 ℃ , some achieves 500~600 ℃ taller even, return debit case as more than heat and character, more use air intake air heater (also can use) of more than heat boiler of course, be in to flue gas temperature under 400 ℃ in microtherm beyond is hot, basically use air intake air heater, the heat exchanger that heat up a canal here can distinguish oneself. Ministerial standard of our country machinist industry " energy-saving design technology provides machinist job " in mention: Temperature of smoke evacuation of industrial furnace kiln is when 400 ℃ are the following, appropriate uses the heat exchanger that heat up a canal. Have in industrial furnace kiln do not have partly greatly quite outfit bring fan, ask resistance of more than hot equipment is little, at the same time because the position is narrow, and requirement equipment is compact, suit to use intake air heater of the air that heat up a canal particularly. We apply all sorts of following decorating means: Heat of ＋ of furnace of kiln of ⑵ of 　 of intake air heater is in charge of air of hot tube of ＋ of ⑴ kiln furnace heat of water heater ＋ is in charge of air intake air heater (apply to smoke evacuation when temperature is very high) gush of ＋ of furnace of kiln of 　 　 ⑶ flows or ooze aluminium is in charge of air intake air heater ＋ heat is in charge of air intake air heater (apply to taller, ought to consider from the following respects: The ① need according to the enterprise, if industrial kiln furnace needs to support combustion, answer to choose air intake air heater as far as possible. When craft needs vapour, with more than heat boiler. The possibility that ② reclaims according to more than heat, the ability in the industrial furnace that more than heat boiler is more than 300 ℃ in smoke evacuation temperature only is possible. ③ dependability, if use carbolic steel,one hydro-thermal is in charge of, the labour inside its canal pledges top job temperature is 300 ℃ , in order to assure safety; Face of cliff of lowest of the side outside hot tube is more than acerbity dew point, with avoiding to corrode. / these choices that limit pair of heat exchanger type also can have immediate effect. ④ economy, the choice of type is in have a variety of plan when the likelihood, need to undertake economy is compared, (According to particular case) choose afore-mentioned formal ⑴ , ⑵ , ⑶ , ⑷ , ⑸ , ⑹ , ⑺ . 2, gas, gas and gas, the water combination heat exchanger that heat up a canal because the smoke evacuation temperature of industrial kiln furnace often taller, exceed 400 ℃ sometimes, can achieve 500~600 ℃ , taller even. As gas, the gas heat exchanger that heat up a canal, highest entrance temperature is in permission flue gas to be 350~400 ℃ only usually, use gas right now, water and gas, the gas combination heat exchanger that heat up a canal is a kind of very good plan, the area application that is ℃ of 350~400 of prep above of flue gas temperature namely is enraged, water type heat exchanger, and in flue gas temperature inferior area application is enraged, the gas heat exchanger that heat up a canal. Of above differentiate with using carbolic steel one hydro-thermal canal is a basis temperature, what its labour pledges is highest allow temperature to be 300 ℃ , specific belong to afore-mentioned formal ⑵ . 3, the hot air that heats up those who be in charge of heat exchanger to match industrial kiln furnace to need 300~400 ℃ or higher temperature sometimes supports combustion. When hot air temperature exceeds 250 ℃ , the top job temperature that is in charge of air intake air heater to be able to make one hydro-thermal provides carbolic steel with heat only exceeds 300 ℃ , because this air heats from inlet temperature,intake air heater of the air that heat up a canal is used when 250 ℃ , and use groovy air to heat up from 250 ℃ rise to higher cost implement, this is one kind decorate means reasonably, as above narrates formal ⑶ . Groovy air intake air heater can choose type of ooze aluminous steel tube or gush to sort type, because they are OK,match together well with intake air heater of the air that heat up a canal. 4, it is OK that the different type heat that heats up tubal beyond heat boiler is in charge of more than heat boiler cent is 2 big kinds: The single pipe box that reach couplet, former the more than heat boiler that applies to small size, hot tube puts Duan Zhi to receive insert drum inside, we develop most high capacity is) of capacity of 2t ／ H(; Latter applies to the more than heat boiler of high capacity, hot tube is radiative paragraph in inserting perpendicular big diameter to be in charge of, these big diameters are in charge of by couplet box again derivative pipe is connected to drum, the capacity that we develop is 1, ) of capacity of 10t ／ H(. The structure of side of vapour of these 2 kinds of forms is different. Because suffer to carbolic steel - the limitation that hydro-thermal canal is versed in temperature of qualitative top job is 300 ℃ , actuating pressure of vapour of more than heat boiler won't exceed 1MPa, temperature of flue gas entrance is average also cannot too tall, if 450~500 ℃ is highest value. When flue gas when inlet temperature is very high, can use afore-mentioned formal ⑹ . 5, the gas in industrial kiln furnace, the water heat exchanger that heat up a canal is in industrial kiln furnace, as a result of the need of the life or the need that manufacture technology, need to apply afore-mentioned formal ⑷ sometimes, below many circumstances, water heater of the canal that it is heat and boiled water implement compound device, it has quite wide application perspective, be in especially town enterprise. 3, conclusion heat is in charge of heat exchanger to be in industrial boiler and industrial kiln furnace all can produce the tremendous effect that cannot replace, undertaking to having stove of boiler, kiln ability changes, reach in building furnace of boiler, kiln can use this device extensively. CNC Milling CNC Machining