Help with different pressure gas mixing problems
Thread Content
There is such a situation: There are two lines of steam, one is 1.2MPa (G), 450 degrees, and the pipe diameter is DN150. The usual usage is relatively small, with a maximum of 4500kg/h. The other is 1.0MPa (g), 250 degrees, the pipe diameter is also DN150, and the maximum amount is 5200kg/h. Basically, this steam is used more. Now I want to mix the two gases. The diameter of the mixed pipe is still DN150. Since the steam pressure of the two gases is different, can it be mixed smoothly? Can 1.0MPa(g) steam be mixed in? Regarding the mixing situation under various circumstances, such as mixing of different pipe diameters and different pressures, how can the mixing be smooth and avoid clogging along the way? Please discuss.
The mixed user cannot exceed 1.0MPa, and use valves to control the flow of the two-way steam.
It is quite wasteful to use the heat energy in the high position on the low position.
The required pressure after mixing is 1.0MPa(g). Now we are worried that the pipe diameters are the same but the pressure is different. Although the high-pressure one has a smaller flow rate, the low-pressure one can enter smoothly. Is this different from mixing different pipe diameters?
I wonder what the steam temperature and pressure will be after mixing? If the temperature of the mixed real air is about 250 degrees, I suggest using a set of temperature and pressure reducing devices to reduce the steam at 1.2MPa450 degrees to 1.02MPa250 degrees. Use a mixing tank, which can not only save steam but also adjust the amount of steam in each channel.
Yes, in fact, it’s nothing. The most important thing is to ensure the normal operation of the system before passing steam and merging steam.
Automatic valves can be used. Electric valves, pneumatic valves or self-supporting back pressure valves are all acceptable. If you want to use more 1.0MPa steam, you can add a valve to the 1.2MPa steam pipeline. All three of the above are acceptable. Measure the temperature or pressure of the mixing tank or mixing cylinder. When the temperature or pressure is less than 1.0MPa or the corresponding temperature, open the 1.2MPa valve.
There is no problem with mixing and they can be controlled by each other, but you should pay attention to the temperature design after mixing and the matching of pipe materials. The pipe diameter is only related to your dosage.
What is the principle of gas mixing at different pressures? Now it is basically certain that after mixing gases of different pressures, the pressure will be controlled at the pressure of the low-pressure gas, which is no problem. What is a simple and effective way to control the scheme? Is it just necessary to add a pressure regulating valve to the low-pressure side gas pipeline (or does the pressure regulating valve actually have other functions)? Are there any requirements for the high-pressure gas side? I want the pressure to be as close as possible to that of low-pressure gas. Is this more resource-saving? Thanks! !
Is the problem solved? What is the situation?