Recycling flue waste heat is effective measures for energy conservation and emissions reduction, glass enterprises at present, many glass enterprises have been on the waste heat boiler, to recycle waste heat of flue, received a considerable economic and social benefits. Choose what kind of waste heat boiler, how to select the waste heat boiler, this is a difficult problem in front of the enterprise. We are engaged in waste heat recovery work for 20 years, analyzed the experience of users, and put forward some views and reference for the general business colleagues.
1, compared several kinds of heat pipe waste heat boiler
Waste heat boiler is the recovery of waste heat, for it as a heat source, to heat the cold water to produce steam or hot water. Authigenic heat and waste heat boiler itself does not heat, totally dependent on waste liquid, waste gas, waste gas, waste residue, waste heat for heat source. Recycling how much heat is the basis of a waste heat boiler output size, and measure the basis of a waste heat boiler performance level.
At present the types of waste heat boiler is basically divided into: heat pipe, water pipe and fire tube which a few kinds. Because of their heat transfer components and the way is different, therefore, operation method of structure is different also, have different characteristics between them. Widely used in glass enterprises is the heat pipe waste heat boiler.
Heat pipe waste heat boiler, it was based on the heat pipe as heat transfer element. Heat pipe is a new type of high efficient heat transfer component, should be more precisely defined is called heat system of "closed", that is in a closed system into vacuum, depending on the load within the fluid phase behavior change (liquid to gas and vapor into liquid) to transfer heat device.
Application in the enterprise of glass heat pipe is used in the heat pipe waste heat boiler are: 1 USES annular finned tube in the form of; 2 in the form of using pure light tube; 3 used in the form of bellows.
2, how to select the heat pipe waste heat boiler
The current users in the use of waste heat boiler, used to say to a few tons of tons of waste heat boiler, this selection is not scientific, not serious. The rigorous should be selected according to the residual heat.
Residual heat is made: the smoke gas, flue gas temperature, flue gas calorific value than to determine.
Residual heat press type calculation:
Q = M1? CP1? (t1, t2)
Type: Q residual heat (KJ or KW)
M1 smoke gas (Nm3 / h or Kg/h)
T1 flue gas inlet temperature (℃)
T2 flue gas outlet temperature (℃)
Flue gas calorific value than the Cp1 (KJ/Nm3 ℃ or KJ/Kg ℃)
According to the calculated residual heat output of the waste heat boiler, press type calculation:
Mb = (Kg/h)
Type: i1 under certain pressure saturated steam enthalpy (KJ/Kg)
I2 under a certain temperature of soft water enthalpy (KJ/Kg)
As the user to provide:
(1) into the smoke gas waste heat recovery boiler (Nm3 / h or Kg/h) or tons of liquid fuel consumption with melting glass yi
(2) into the waste heat boiler flue gas temperature (℃)
(3) the actual need of the steam pressure (Mpa)
The designer according to the above parameters, classics