Discussion on the wear of the high-pressure flash inlet baffle in graywater systems
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It is reported that the inlet baffles of the high-pressure flash tanks in typical Texaco wastewater treatment systems are severely worn and damaged, resulting in substantial maintenance work. Each factory has its own little tricks, but they only provide temporary solutions rather than addressing the root cause. Those with practical experience are welcome to join the discussion.
It should be addressed through two separate solutions: 1. The pressure of the high-pressure gray water is high, and after pressure reduction, the flow rate becomes too fast (I’m not exactly sure about the specific flow rate: $). The high flow rate of the gray water leads to severe wear and tear. Our plant divides the pressure reduction process into two stages, which helps to alleviate the problem of short operation cycles to some extent. 2. Focus on the materials used; our factory is now switching to cast iron, which should be more wear-resistant than stainless steel plates, as it is a solid piece of cast iron that won’t cause any issues during parking. It’s just a way to spark discussion; by exchanging ideas with one another, we can resolve all these technical issues.
1. Install a wear-resistant lining on the inner wall of the pipeline segment ranging from the angle valve that feeds the gasified black water into the high-pressure flash tank to the anti-scour plate； 2. After parking, check the buffer tank behind the angle valve; if the flange surface of the baffle is severely worn, repair it. The fundamental solution is unknown; I hope everyone will continue to discuss it.
How long can your method run?
Reduce elbows, optimize materials, add wear-resistant linings, and conduct regular inspections for wear. To address the root of the problem, it is necessary to reduce the ash content in coal and lower the solid content in ash water ； Reduce the flow rate and increase the flash stage.
The buffer tank behind the angle valve must be large enough and long enough to minimize the impact force resulting from the pressure reduction of the black water
When the black water flows at high speed through the pipes, sudden changes in internal pressure cause steam present in the black water, as well as gases dissolved in it, to form bubbles on the pipe wall surface; these bubbles burst, and the shock generated by their rupture exerts a strong impact on the pipe wall surface, which is what is known as gas corrosion
Our company has applied for two patents in this area, which should help solve the problem of wear
1: In terms of material selection, our company uses composite materials for production. 2: Structurally, it controls the spread of water flow and changes its direction.
This involves focusing on the equipment and operations: for the equipment, wear-resistant materials are used, with cast iron generally being chosen for the base plates. As for operations, it is important to ensure stable system performance, to carry out thorough inspections during routine checks, and to conduct timely inspections and replacements after the system is shut down.
Our factory also often gets flooded by the sea, and we haven’t found a solution
Our coating is tungsten carbide, and it works quite well.