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This formula is calculated according to the running costs of the case of complete combustion of the fuel gas company overview henan province sitong boiler, practical applications to higher gas consumption, gas consumption in the calculation of the gas boiler should take full account of the calorific value of natural gas, boiler efficiency, so calculated the value to be able to meet the actual situation.
3. Water rinse after pickling and pickling
Pickling effect is to deposit a metal wall from insoluble into soluble salts or complex, dissolved in the cleaning solution, then when the waste liquid discharge drain.
1) monitoring pipe system to be cleaned in the acid feed to a predetermined concentration, into the circulatory system, monitors and controls the flow tube and the flow rate of the washing water is cooled in the boiler wall tubes similar.
2) cleaning solution must strictly control the temperature of the pickling solution in pickling, cycle rate, liquid level in the drum of the acid tank, and one hour intervals, check cycle time, record truthfully problems.
3) When the cleaning cycle each circuit to a predetermined time, and measuring the concentration of the acid concentration of iron ions should be strengthened. When each circuit in the pickling solution ferric ion concentration and acid concentration and stable balance, pickling is expected to end, the detection tube can be removed to check the cleaning effect, when the inner pipe is still dirt to be monitored in the pipe system Replacing continue cleaning to clean the monitoring pipe, the circulation should IH, stopped before pickling.
4) the activated metal surface to prevent secondary rust, at the end of pickling acid should not be used directly by the process of emptying the flushing water on again, a purity of greater than 97% of the available continuous ejection nitrogen waste acid, may also be used in addition to salt water ejection waste acid, the acid using variable flow ejection flushing water, flushing water flow rate to be achieved purge rate more than doubled. Possible to shorten the washing time, rinse water to the discharge liquid Ph value of 4 to 4.5, until the iron content of less than 50mg / L.
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