The temperature of the inlet gas is too high
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The temperature of the inlet gas is as high as 225 degrees. What is a good solution? What impact does long-term high temperature have on the equipment?
This situation has been encountered before, so the load of the acid cooler in the absorption tower will be higher. If the temperature continues to rise, on the one hand, it will accelerate the corrosion of the tower lining, and on the other hand, it will cause the temperature of the flue gas entering the second revolution to be low, affecting the heat balance of the second revolution.
I don’t know if you are talking about an oxidation roasting system or a sulfation roasting system? If your system has a waste heat power generation system, it is recommended to add a gas saver between the third heat exchanger and the first suction for heat exchange, which can be used to preheat the boiler water. If there is no gas saving, the secondary line of the conversion section can be used for temperature adjustment.
It has a great impact on the absorption rate of the first inhalation, and also has an impact on the later parts of the system.； A temperature of 225 degrees is not harmful to the equipment. The problem is whether the high temperature is caused by the equipment. We must first find out the cause.
Is it a matter of heat exchanger selection? The selection of 3rd and 4th heat exchangers is too small and the heat calibration needs to be carried out.； Or the system concentration has increased and is different from the original design. You have to determine the cause based on the production situation before choosing a solution.
Your opinions are very good. It should be an equipment problem. Our factory also plans to add an economizer at the first suction inlet to solve the problem. To increase production, this can only be done temporarily. The main reason is insufficient heat exchanger area.
There is already excess heat in the conversion system, it's just a question of whether to use it or not.
It is also possible to lower the third-stage inlet temperature, or if the system permits, lower the sulfur dioxide gas concentration. try it
Currently, there is still a problem of decreasing the conversion temperature in the 5th stage. How to allow all stages to participate in the reaction? Do you have any good measures? The inlet temperature of the 2nd and 3rd stages has been exceeding the standard, basically exceeding about 50 degrees. Can you help me analyze the existing problems?
Is the gas concentration or the oxygen-sulfur ratio imbalance?
If the first suction temperature is high, it is likely that the heat transfer efficiency of the heat exchanger is not up to standard! Is it "efficient"? ? Tube heat exchanger?
The 60,000-ton production line put into operation by our factory in 2008 also has this problem. The first suction inlet temperature is 220 degrees and the second suction inlet temperature is 160 degrees. The inlet temperatures of the second and third stages cannot be adjusted. If the production is increased, it will not work and it will easily cause exhaust gas. Now the only operation is to reduce the gas concentration. The reason is that the heat exchange area of the external heat exchanger is insufficient. It can only be solved by taking cooling measures. Or increase the heat exchange area of the external heat exchanger during technical renovation.
Such a temperature can reach the high-temperature absorption index. If it is not for high-temperature absorption, it is too high. The main reason is that the heat exchanger area is not enough, or it may be that the conversion heat surplus is too large.