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text 2020-10-27 06:31
The heating temperature cannot meet the requirements

After the plate heat exchanger has operated for a period of time, the pressure drop is too large due to fouling on the plate surface..  ③ The flow distribution of multiple plate heat exchangers operating in parallel is uneven.  ② It is best to use softened water for the secondary circulating water.    Reasons:   ① Insufficient medium flow on the primary side, resulting in a large temperature difference on the hot side and a small pressure drop.   Hope that the introduction of plate heat exchangers can be helpful to you, follow us for more news! If you don’t understand those aspects, you can consult us and we will have professionals to answer you.8 nitric acid solution containing 0.3 urotopin, 0.2-0.  3.

 

The pipeline of the operating system is not normally purged, especially when many dirt (such as welding slag, etc.   Example: In 2000, our factory provided a BR10 plate heat exchanger for users in Xinjiang, which is used in a water-to-water heat exchange central heating system.  ②

 

The cold side temperature is low, and the cold and hot ends have low temperatures. Finally, circulate the clean water several times to control the Cl mass concentration in the clean water below 25 mg/I. The Heat Exchangers FHC060B cycle cleaning time is 10-15 min.3 MPa, making the secondary network hydraulic balance serious Imbalance. When disassembling and cleaning, soak the plate in the cleaning solution for 30 minutes, then use a soft brush to gently brush the scale, and finally clean it with water.

 

The heating temperature cannot meet the requirements.3 sulfamic acid solution or 0. The design temperature of the primary water supply is 130℃. If the mechanical backwashing method without disassembly is adopted, a nozzle should be connected to the medium inlet and outlet pipes in advance, the equipment is connected to the mechanical cleaning vehicle, and the cleaning fluid is injected into the equipment in the opposite direction of the medium flow.15 m/s. When the water temperature is not more than 95℃, the concentration of Ca and Mg should not be more than 2 mmol/L; when the water temperature is more than 95℃, the concentration of Ca and Mg should not be more than 0.  ④The internal scale of the heat exchanger is serious

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text 2020-10-15 07:16
Try to make the convective heat transfer coefficients

Try to make the convective heat transfer coefficients in the cold and hot water channels equal or close to each other to get a good heat transfer effect.The plate heat exchanger is a high-efficiency heat exchanger made up of a series of metal sheets with a certain corrugated shape. According to the fluid pressure and temperature, determine whether to choose a detachable type or a brazed type. Because the 'U'-shaped single-flow pipes are fixed on the compression plate, it is easy to disassemble and assemble. As long as you pay attention to the above points, I believe that everyone will choose the right product..  

 

The plate type or corrugated type should be determined according to the actual needs of the heat exchange occasion. Under normal circumstances, several flow channels are connected in parallel or in series to form different combinations of cold and hot medium channels.  

 

The process combination form should be calculated based on heat exchange and fluid resistance, and determined under the requirements of process conditions. It is also a headache when we buy it, so when choosing a plate heat exchanger Several issues should be paid attention to when modeling? Let’s follow the plate heat exchanger to Copper Plate Heat Exchangers FHC110G learn about it~    process refers to a group of parallel runners in the same flow direction of a medium in the plate heat exchanger, and the runner refers to the medium composed of two adjacent plates in the plate heat exchanger Flow channel.

 

This problem should be paid attention to for large heat exchangers. When determining the plate type, it is not advisable to choose a plate with a single plate area that is too small, lest there are too many plates, the flow velocity between the plates is too small, and the heat transfer coefficient is too low. If the flow rate is large and the pressure drop is small, the plate type with low resistance should be selected, otherwise, the plate type with large resistance should be selected.  

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text 2020-10-01 09:34
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text 2020-09-29 04:21
The allowable deviation of the corrugation depth of the plate

Before disassembling, close the medium inlet valve, and close the high-pressure side valve first, and then close the outlet valve, so that the heat exchanger is slowly cooled to 40°C and then discharged, and then removed The connected pipeline can only be lifted off as a whole. First remove the connection pipe, and then loosen the fixing bolts in energy saving heat exchanger manufacturers the diagonal direction. Therefore, the overall installation position is generally lifted off during the overhaul, and the overhaul is disassembled at a suitable place for overhaul. 

 

The maintenance cycle of plate heat exchanger is generally 2 years.2mm, and the unevenness shall not be greater than 1%.   Hope that the introduction of plate heat exchanger manufacturers can be helpful to you, follow us for more news! If you don’t understand those aspects, you can consult us and we will have professionals to answer you!. The surface should be smooth, consistent in thickness, free of transverse cracks, no bubbles, no gaps, no aging, no lap and butt marks.

 

When removing the plates, tilt the plates 15 degrees-20 degrees to one side and remove them with a slight upward lift.The allowable deviation of the corrugation depth of the plate is ; 0.When the plate heat exchanger is repaired, pay attention to the large number of plates of the plate heat exchanger, and it must be cleaned one by one, and all the pads are replaced with new pads. For the heat exchanger body, remove the compression bolt protection sleeve, derust and oil all the bolts; check the sliding surface of the upper beam and wipe it clean; check the upper roller of the movable platen to make it flexible; measure and record the plate The stack length 'A' should be kept unchanged when reinstalling.

 

Do not remove them forcibly to prevent the upper positioning groove from being deformed or damaged, and then arrange the plates in the order of installation. When inspecting the heat exchanger plates, the plates should be free of defects such as cracks, scratches, deformation, etc. In the process of disassembly, the width direction deviation of the movable pressing plate shall not exceed 10mm, and the vertical deviation shall not exceed 25mm, and the movable pressing plate shall be kept basically moving in parallel. Before maintenance, the gasket to be replaced must be carefully inspected. Let’s take a closer look at the plate heat exchanger manufacturers.,

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text 2020-09-17 09:11
The corrugated plate is usually made of stainless steel

The second one I want to introduce to you is what we call flat plate heat exchanger products, which are mainly made of a certain shape, corrugated thin plates and sealing gaskets. The cold and hot fluids are separated on the corrugated plate. The two sides flow to the middle and flow through the plates for heat exchange.

 

The corrugated plate is usually made of stainless steel with a thickness of 0.5-3mm, and the hot fluid flows through the two sides of the corrugated plate, and the well plate performs heat exchange. Corrugations are usually punched from thin plates of stainless steel, aluminum, titanium, and molybdenum with a thickness of 0.5-3mm. The advantage of the flat plate heat exchanger is its high heat transfer coefficient (about 2 to 4 times higher than that of the shell and tube heat exchanger), easy to disassemble and wash, and the number of plates can be increased or decreased to adjust the heat transfer area.

 

The operating pressure usually does not exceed 2MPa, and the operating temperature does not exceed 250°C. The third type is what we usually call the plate-fin heat exchanger. It consists of a bundle of heat exchange plates enclosed in a collecting box with cold and hot fluid inlets and outlets.

 

 

The plate bundle is formed by alternately overlapping flat plates and corrugated fins, and brazing and fixing. The cold and hot fluids flow through the two sides of the plate to exchange heat, and the fins increase the heat transfer area, promote the turbulence of the fluid, and enhance the equipment.

 

The plate-fin heat pump exchanger has a very compact structure (heat exchange area of ​​4400m/m), good heat transfer effect, and working pressure up to 15MPa. However, its manufacturing process is complex, the flow channel is small, and the internal leakage is not easy to repair, so it is limited to clean non-corrosive fluids, such as heat exchangers for air separation. Hope that the introduction of the plate heat exchanger customer service can be helpful to you, follow us for more news! If you don’t understand those aspects, you can click to consult us, and we will have professionals to answer you!

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