In shell-and-tube heat exchangers the flow enters different tubes in parallel. When tubes start to foul, the local Another important anti-fouling factor is the flow turbulence. This is caused by both the spiral flow and the continuously curving passages, which create turbulence in the flow.
Numerical investigation on pre-heating of coal water Nov 01, 2018 · During the process of flowing, coal water slurry in shell side exchanges heat with the tube wall. Eventually, the temperature of outlet is obviously higher than that of inlet, which means the pre-heating of coal water slurry using shell-and-tube heat exchanger with fold helical baffles is efficient.
Heat Exchanger Fluid Allocation:Shellside or Tubeside Jan 29, 2011 · Thermal expansion problems may govern selection of fluid for tube-side and shell-side. (i.e. if fluid temperature change is > 150°C (300°F) then normally you would put it in the shells-side which can better handle large temperature change in certain exchanger designs) Very small volumetric flow rates or high viscosity streams could be shell
Aug 26, 2008 · One stream is a slurry (something that comes pretty close to sewage sludge, is cold, needs to be heated) and one stream containing significantly less solids as the first stream, but fouling is still possible on this side of the heat exchanger. Flows are industrial, and quite large (order of 10 kg/s). Temperatures remain below 100 deg C.
Heat transfer performance of a newly developed ice slurry Dec 01, 2010 · The scraper blades heat exchanger used in the present work consisted of three staggered blades attached to the scraper shaft and located in the inner tube, where the water passes, as shown in Fig. 1a. The inner tube and the outer shell are 150 and 200 mm in diameter, respectively. The heat exchanger has a total length of 1.5 m. The heat exchanger was cooled by HCFC-22 as primary refrigerant, which flowed parallel-currently through the annuli of the heat exchanger.
conventional shell and tube heat exchangers in series for indirect heating of the slurry in two preheaters as well as in the final heater. It should be recognized that each preheater consists of 'n' heat exchanger shells in series, while the final heater employs 'm' shells in series.
Spiral heat exchanger technologyAug 01, 2021 · Even in such fouling environments, shell-and-tube heat exchangers are widely used due to their well-known designs and ease of fabrication with low manufacturing cost. Shell-and-tube heat exchanges always suffer from scaling formation created by high fouling.
Mar 26, 2018 · In most shell and tube heat exchangers, cleaning the tubes is easier than the shell. Therefore, putting your fluid thats more likely to foul on the tubeside is generally a smart idea. Of course, this depends on the heat exchanger design. U-tubes are typically more difficult to clean than straight tubes.
Shell And Tube Exchanger In Slurry Applications Jun 08, 2012 · Shell And Tube Exchanger In Slurry Applications - posted in Industrial Professionals:We have a horizontal shell and tube exchanger with slurry being through tube side. We used to face frequent fouling and precipitation issues in the tubes that drops heat transfer efficiency and requires chemical and/or mechanical cleaning.
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