Material description of main components of plate heat exchanger and possible causes of insufficient heating
From the development history of plate heat exchangers, we can easily see that
the ultimate goal of each improvement is to improve the heat exchange efficiency
between the media. In the early stage of the development of plate heat
exchangers, due to the limitation of technical level, the development of plate
heat exchangers is mainly structure and plate type, which is calculated and
analyzed through thermal experiments. After entering the modern era, plate heat exchangers company pay much attention on the
development of plate heat exchangers which focuses on the selection of component
materials and optimization of structural details.
Plate material of plate heat exchanger and main application conditions:
1. Stainless steel plate, mainly used in the premise of clear water, river water, edible oil, minerals, etc .;
2. Titanium and titanium-palladium plates are mainly used in the premise of dilute sulfuric acid and inorganic aqueous solutions;
3. Nickel plate is mainly used in the premise of high temperature and high concentration of caustic soda;
4. Hastelloy plates are mainly used in the premise of concentrated sulfuric acid and inorganic aqueous solutions;
5. Molybdenum sheet is mainly used in the premise of dilute sulfuric acid and inorganic aqueous solution;
6. Graphite sheet, mainly used in the premise of hydrochloric acid, medium concentration sulfuric acid, phosphoric acid, fluoric acid, etc .;
Material of sealing rubber pad of plate heat exchanger and main application conditions:
1. Nitrile rubber gasket can withstand the highest temperature between 110 degrees-140 degrees, mainly used in the premise of water, sea water, mineral water, salt water, etc .;
2, EPDM gasket, the highest temperature that can withstand is between 150 degrees-170 degrees, mainly used in hot water, steam, acid, alkali and other prerequisites;
3. The maximum temperature that the fluorine rubber gasket can withstand is 180 degrees, which is mainly used in the premise of high temperature water, acid, alkali, organic solvents, etc .;
4. Neoprene sheet can withstand a maximum temperature of 130 degrees, which is mainly used in the premise of acids, alkalis, minerals, lubricants, etc .;
5. Silicon rubber gasket can withstand the highest temperature between 180 degrees and 220 degrees, which is mainly used for food, oil, fat, alcohol, etc.
6, asbestos rubber gasket, the highest temperature that can withstand is 260 degrees.
Material of plate heat exchanger frame plate:
1. Frame material of scale, generally carbon steel;
2. The special frame board material is semi-stainless steel or full stainless steel.
Plate heat exchanger interface material:
1.The interface material of the scale is stainless steel bushing;
2. Special interface materials include nitrile rubber, EPDM, Hastelloy, titanium and other alloys.
So what is the reason for the insufficient heat supply of the heat exchanger?
First of all, because of the problem of flow distribution, everyone knows that the structure of the plate heat exchanger is connected by multiple small pieces, and the plate heat exchanger often uses multiple heat exchangers to work in parallel during the work. This will cause the problem of very uneven flow distribution in the heat exchanger, which is also the main reason for the insufficient heat supply of the plate heat exchanger.
Second is the internal structure of the plate heat exchanger. The lack of medium flow on the primary side often causes a large temperature difference on the hot side and a small pressure drop.
The last reason is about the accumulation problem caused by the long-term non-cleaning of the plate heat exchanger. Because the plate heat exchanger has not been cleaned for a long time, the scaling phenomenon easily occurs. This is another cause of the insufficient heat supply of the plate heat exchanger. Big reason.
Of course, there may be other reasons for the insufficient heat supply of the plate heat exchanger, but the above are several common reasons. In general, if the insufficient heat supply occurs, you should be able to find out the cause.
 |
| heat exchanger |
Plate material of plate heat exchanger and main application conditions:
1. Stainless steel plate, mainly used in the premise of clear water, river water, edible oil, minerals, etc .;
2. Titanium and titanium-palladium plates are mainly used in the premise of dilute sulfuric acid and inorganic aqueous solutions;
3. Nickel plate is mainly used in the premise of high temperature and high concentration of caustic soda;
4. Hastelloy plates are mainly used in the premise of concentrated sulfuric acid and inorganic aqueous solutions;
5. Molybdenum sheet is mainly used in the premise of dilute sulfuric acid and inorganic aqueous solution;
6. Graphite sheet, mainly used in the premise of hydrochloric acid, medium concentration sulfuric acid, phosphoric acid, fluoric acid, etc .;
Material of sealing rubber pad of plate heat exchanger and main application conditions:
1. Nitrile rubber gasket can withstand the highest temperature between 110 degrees-140 degrees, mainly used in the premise of water, sea water, mineral water, salt water, etc .;
2, EPDM gasket, the highest temperature that can withstand is between 150 degrees-170 degrees, mainly used in hot water, steam, acid, alkali and other prerequisites;
3. The maximum temperature that the fluorine rubber gasket can withstand is 180 degrees, which is mainly used in the premise of high temperature water, acid, alkali, organic solvents, etc .;
4. Neoprene sheet can withstand a maximum temperature of 130 degrees, which is mainly used in the premise of acids, alkalis, minerals, lubricants, etc .;
5. Silicon rubber gasket can withstand the highest temperature between 180 degrees and 220 degrees, which is mainly used for food, oil, fat, alcohol, etc.
6, asbestos rubber gasket, the highest temperature that can withstand is 260 degrees.
Material of plate heat exchanger frame plate:
1. Frame material of scale, generally carbon steel;
2. The special frame board material is semi-stainless steel or full stainless steel.
Plate heat exchanger interface material:
1.The interface material of the scale is stainless steel bushing;
2. Special interface materials include nitrile rubber, EPDM, Hastelloy, titanium and other alloys.
So what is the reason for the insufficient heat supply of the heat exchanger?
First of all, because of the problem of flow distribution, everyone knows that the structure of the plate heat exchanger is connected by multiple small pieces, and the plate heat exchanger often uses multiple heat exchangers to work in parallel during the work. This will cause the problem of very uneven flow distribution in the heat exchanger, which is also the main reason for the insufficient heat supply of the plate heat exchanger.
Second is the internal structure of the plate heat exchanger. The lack of medium flow on the primary side often causes a large temperature difference on the hot side and a small pressure drop.
The last reason is about the accumulation problem caused by the long-term non-cleaning of the plate heat exchanger. Because the plate heat exchanger has not been cleaned for a long time, the scaling phenomenon easily occurs. This is another cause of the insufficient heat supply of the plate heat exchanger. Big reason.
Of course, there may be other reasons for the insufficient heat supply of the plate heat exchanger, but the above are several common reasons. In general, if the insufficient heat supply occurs, you should be able to find out the cause.
Comments
Post a Comment