Seeking information on the initial steam production volume during hydrogen production startup
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For a hydrogen production plant with a capacity of 40,000 standard cubic meters per hour, the maximum circulation rate of nitrogen in the compressor is 12,000 NM3/h. The temperature at the outlet of the furnace is 820°C, while it is 500°C at the inlet. Could someone help me calculate how much steam at 3.5 MPa can be produced? Thank you @zf201012
At full load, the unit produces approximately 61 tons per hour of medium-pressure steam, of which 26 tons per hour is supplied to external parties.
I want to calculate the steam generation rate of the hot nitrogen cycle at the time of initial startup, when the catalyst is being installed
There’s a flow meter for the steam being delivered, right?
It produces about 30 tons per hour of medium-pressure steam, of which 15 tons per hour is supplied to external parties.
In the simulation software, the steam generation rate in the semi-mature boiler is only 3 tons – isn’t that incorrect?
The software is sometimes incorrect; the estimation is mainly based on the nitrogen circulation rate, with a gas production volume of around 30 tons.
How is the heat load for that part of the furnace calculated? It surely isn’t proportional to the actual values. Can’t this part be calculated using the proportion of process gas?
Based on experience, the gas production volume will not exceed 10T
At this stage, no catalysts are installed in any of the reactors; nitrogen is used in place of the raw materials, and operations are carried out under simulated parameters to check whether the performance and quality of the equipment, instruments, interlock logic, electrical systems, etc. throughout the system meet the requirements specified in the design specifications； Check the thermal expansion of the converter tubes, as well as the upper tail tube and lower collector tube ； It is necessary to determine whether the process parameters meet the design requirements, fully identify the problems existing in the system, and understand the internal relationships between various processes. By adjusting the process flow and lighting up the conversion furnace, training can be carried out at the relevant positions, thereby laying a solid foundation for the subsequent load testing and ensuring the successful commissioning of the facility from the first attempt. And the converter is baked during hot nitrogen operation ； Drying of the cold wall cone at the front of the converter off-gas furnace ； Alkaline cooking of the steam generation system ； Trial operation of the converted gas waste boiler and flue gas steam generation system. This is for the purpose of heat-nitrogen combined operation; as for how much steam will be generated, will we know that soon? Check whether the design requirements are met; if not, identify the reasons.
I am generally aware of these situations. I want to know that the steam production volume is mainly due to the fact that we don’t have external supply of 3.5MPa steam; the steam required by the turbines also has to be generated for hydrogen production. Under normal operating conditions, this amount is sufficient, but I’m not sure about the situation during startup. Therefore, I would like to check whether there will be enough steam for the turbines, so as to plan the startup time accordingly.