What are the advantages of titanium heat exchangers?
What are the advantages of titanium heatexchangers?
Titaniumheat exchangeris a heat exchange device made of high-quality titanium tubes that transferspart of
the heat of the hot fluid to the cold fluid.
Figure 1 Titanium heat exchanger
First, let's first understand theknowledge of the metal material "titaniumand titanium alloy" used tomake tita-
nium heat exchangers. Titanium is a silver-white transition metalcharacterized by light weight, high strength, meta-
llic luster, and resistanceto wet chlorine corrosion. Specifically, the density is small. The density ofmetal titanium
is 4.51g/cm3, which is higher than aluminum and lower thansteel, copper, and nickel, but the specific strength is
the first among metals.Titanium and oxygen have a great affinity. In the air or in anoxygen-containing medium, a
dense, strong adhesion and inert oxide film isformed on the surface of titanium, which protects the titanium matrix
fromcorrosion. Even due to mechanical wear, it will quickly heal itself orregenerate. This indicates that titanium is a
metal with a strong tendency topassivation. The titanium oxide film always maintains this characteristic whenthe
medium temperature is below 315℃.
Figure 2 Titanium
In order to improve the corrosion resistanceof titanium, surface treatment technologies such as oxidation, ele-
ctroplating,plasma spraying, ion nitriding, ion implantation and laser treatment have beendeveloped to enhance
the protection of the titanium oxide film and obtain thedesired corrosion resistance. effect. In response to the need
for metalmaterials in the production of sulfuric acid, hydrochloric acid, methylaminesolution, high-temperature wet
chlorine and high-temperature chloride, a seriesof corrosion-resistant titanium alloys such as titanium-molybden-
um, titanium-palladium, titanium-molybdenum-nickel, etc. have been developed.Titanium uses titanium-32 molyb-
denum alloy, titanium-0.3 molybdenum-0.8 nickelalloy is used in environments where crevice corrosion or pitting
corrosion iscommon, or titanium-0.2 palladium alloy is used locally in titanium equipment,and good results have
Figure 3 Titanium
Titaniumheat exchanger is made of high-quality titanium tubes. In terms of physical properties,titanium tubes
have many advantages such as light weight and superiormechanical properties. Titanium is strong, and the tensile
strength of puretitanium can reach up to 180kg/mm2. Some steels are stronger than titaniumalloys, but the speci-
fic strength (the ratio of tensile strength to density) oftitanium alloys exceeds that of high-quality steels. In addition,
titaniumalloys have good heat resistance, low temperature toughness and fracturetoughness. The new titanium
alloy has good heat resistance and can be used fora long time at 600℃ or higher. The titaniumheat exchanger is
made of high-quality titanium tubes. In terms of physicalproperties, titanium tubes have many advantages such as
light weight andsuperior mechanical properties. Titanium is strong, and the tensile strength ofpure titanium can
reach up to 180kg/mm2. Some steels are stronger than titaniumalloys, but the specific strength (the ratio of tensile
strength to density) oftitanium alloys exceeds that of high-quality steels. In addition, titaniumalloys have good heat
resistance, low temperature toughness and fracturetoughness. The new titanium alloy has good heat resistance and
can be used fora long time at 600℃ or higher.
Titanium chemical properties
In terms of chemical properties, titaniumexhibits good stability and good corrosion resistance in a variety of
industrial solutions. Industrial pure titanium is an excellent material forrefrigeration equipment accessories. Indust-
rial pure titanium can be widelyused in organic compounds, alkaline solutions, salt solutions and other media, and
it is not easy to react with it, and has excellent corrosion resistance;pure titanium has low concentration of hydro-
chloricacid, sulfuric acid, nitricacid and other inorganic acids at room temperature. Good corrosion resistance; but
with the increase of medium concentration and working temperature,industrial pure titanium is easy to chemically
react with the above-mentionedinorganic acid, which reduces the corrosion resistance of titanium. Therefore,att-
ention should be paid to the concentration and concentration of the mediumduring heat exchange. Operating
Titanium heat exchangers are not easy tolose metal ions, so they can make full use of this non-magnetic feature
to be usedas heat exchangers for special purposes such as pharmaceuticals and food. Dueto the strong corrosion
resistance of titanium, the heat exchanger has a longservice life and low maintenance costs during use.
Take HangzhouShenshi Energy Saving Technology Co., Ltd. as an example. Hangzhou Shenshihas focused on
heat exchangers for more than 10 years. In the past five years,it has accumulated many technologies and patents in
the field of heat exchangers and micro-channel reactors. HangzhouShenshi has developed Marine Condensing
ShenshiMarine condensing coils are made oftitanium with enhanced grooveline technology to achieve high
efficient and highcorrosion resistance. Using sea water as cold source for providing heat/coldair, the marine AC can
supply comfortable working can living condition for themarine.
Figure 4 example of coaxial heat exchanger for marine AC
ShenshiShell and pipe heat exchanger isa kind of high efficiency heat exchanger which is composed of high
efficient Ωstyle inner pipes and shell of baffle plastic plate(-PA6). It has the advantages of shell and tube heat
exchanger and plate heat exchanger.
Figure 5 Ω-type titanium tube
Figure 6 Shell and pipe heat exchanger
Hangzhou Shen's titanium heat exchangerhas many advantages and is widely used in all kinds of seafood farm-
ing, seawater heat exchange, salt water heat exchange, chemical industry,refrigeration, electroplating industry ,
central heating and other industriesand fields.