In order to improve the living environment, air quality, responsiveness "Blue Sky Plan", Shaanxi Province, actively promote the transformation of the overall governance and elimination of the 2 8 mw food boiler. As more coal-fired boiler emissions greater degree of pollution, dust, sulfur, soot and other, as the main subject of governance. On the contrary, due to the use of cleaner gas-fired boiler of natural gas, compared to the more coal-fired boilers, greatly reducing combustion emissions of pollutants, widely loved and widespread use of the user.

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.

To protect the economic development of enterprises, production safety running smoothly, according to Qingyang County in Anhui Chizhou municipal government air pollution control requirements, coal-fired 2 8 mw food boiler inspection pull the plug on a regular basis in October 2018.

Qingyang County Market Supervisory Authority for the county a number of companies were visited research to understand the company's current production operating conditions and problems, start from regulatory functions, for enterprise development to provide quality services, reduce business costs.

Special equipment boiler pressure is high risk, than a regular inspection cycle must immediately stop using, but they are also necessary for the production of business equipment, once the shutdown enterprises will face shutdown. Looking at business owners anxious eyes and counties actively discussing with the city center expert special inspection, and according to regulations, to quickly determine a set of effective programs and promptly inform each enterprise.

Through contact with the surrounding counties and cities to understand the relevant units of the boiler fuel change fees and counties take the initiative and boiler companies approached agreed upon with the use of rehabilitation programs, a significant reduction in transformation costs. Up to now, Qingyang County has completed 12 boiler fuel change work, the cumulative cost of more than 60 million.

First, the reason for not operating a burner, the gas pressure is lower than the low voltage protection switch. On Check gas valves are open, if there is gas in the tank. 2, the gas pressure is higher than the pressure protection switch. Shut off valve, and check the pressure reducing valve or regulator box has failed. 3, steam 2 8 mw food boiler water level is too low, there is very low interlock. Boiler water level observation, grasp the true level, after manual Sheung Shui to eliminate problems. 4, gas steam boiler pressure is higher than the starting pressure. Natural gas and other boiler pressure to reduce the pressure to start, you can start properly. 5, but the leak valve block. Manifolds may be a leak. 6, the burner or blacksmith ion probe no reliable ground line. Second, the matter before the gas boiler operation Note 1, gas steam boiler before ignition must conduct a comprehensive examination, including the burner and related accessories and pipes are complete good, the operation is flexible. Before the water is not required to close the drain valve, open a safety valve, allowing air furnace can be discharged. After all the examination was normal, boiler before ignition Sheung Shui, Sheung Shui to drum should be the normal water level, turn on any air, flue baffle. Start the blower, the flue of the furnace and vent purge, purge time is not less than 30 seconds, and then start the ignition burner. 2, the treated water injected into the gas boiler, the water temperature should not exceed 40 ℃, when the pot water level reaches the lowest level, i.e. the inlet valve closed, to observe whether the water level is lowered. After firing the pot should always pay attention to the water level, the water level will rise as a result of exceeding the maximum safe water level can be heated sewage. 3, when the gas and steam emitting steam boiler the safety valve opens, the safety valve should be closed, when the boost to 0.2 ~ 0.3MPa, inspection manhole discharge valve leaks and the like.

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