ã€China Aluminum Industry Network】In the process of oxidation and spraying pretreatment of aluminum alloy profiles, in order to keep the bath temperature within a certain range, various industries such as coal, electricity, oil, gas, etc. will be used for the fuel industry. boiler. Under normal circumstances, the boilers used by aluminum extrusion companies are usually small steam boilers with 2-4 steam tons/h. In the past, many manufacturing companies generally used coal or heavy oil as fuel for heating to reduce production costs, and dust-free desulphurization and other environmental protection facilities were not installed on the boiler, causing the dust around the boiler to fly, and the dust and SO2 content in the exhaust gas did not meet the national emissions. standard. In the global attention to energy conservation and emission reduction to protect the environment, the use of various industrial boilers has attracted people's attention. For this purpose, in order to strengthen environmental protection, we have changed the combustion medium for industrial boilers in use, changed from using heavy oil heating in the past to heating with 0# diesel oil, and carried out environmental tests for exhaust emissions, combined with actual use conditions. Environmental protection measures are used as a reference to provide guidance for personnel.
2. Test test conditions
2.1 Tested Industrial Boiler
(1) Two steam ton/h boilers for aluminum production. The model number is: WNS2-1.25-Y.
(2) One 4-ton boiler/h boiler for aluminum production. The model number is: WNS4-1.25-Y.
2.2 Test Instruments and Equipment
The main equipments used in the test include WJ-60B Pitot tube parallel automatic dust sampler, electronic analytical balance (Sartorius BT124S), QT201 Lingeman smoke monitoring telescope, YX-DL integrated sulfur analyzer, all equipment And the instrument is certified by the national legal measurement department and is within the validity period.
2.3 Test Analysis Method
Boiler sampling and sample test analysis methods mainly include:
(1) Positioning Electrolysis (HJ/T57-2000)
(2) Positioning Electrolysis Method, "Air and Waste Gas Monitoring and Analysis Methods" (State Environmental Protection Administration, Fourth Edition, 2003)
(3) Test method for boiler smoke (GB/T5468-1991)
(4) Smoke-detecting telescope method, "Air and exhaust gas monitoring and analysis method" (State Environmental Protection Administration, Fourth Edition, 2003)
(5) Determination of Total Sulfur in Coal (GB/T214-2007)
3. Test process
This test is conducted under the normal production working conditions, using 0# diesel as fuel for 2 steam ton/h industrial boiler and 4 steam ton/h industrial boiler for exhaust gas environmental test. Each boiler is set up according to the provisions of GB/T16157 "Determination of particulate matter in fixed source exhaust gas and sampling of gaseous pollutants", and there are longer smoke detection holes, sampling platforms and related facilities. Each test cycle is half an hour, and each boiler is divided into three periods to take test samples.
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