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  • Describe the structural characteristics of shell and tube heat exchangers

    The shell and tube heat exchanger consists of the shell, heat transfer control, tube sheet, baffle plate (baffle plate) and tube box. The shells are mostly cylindrical, with internal controls, and the two ends of the controls are fixed on the tube sheet. There are two kinds of hot and cold fluids for heat exchange, one is moving inside the tube, called the tube-side fluid; the other is moving outside the tube, called the shell-side fluid. In order to improve the heat transfer coefficient of the fluid outside the tube, several baffles are usually installed in the shell. The baffle can improve the velocity of the shell-side fluid, forcing the fluid to pass through the lateral control repeatedly on a regular journey, enhancing the degree of fluid turbulence. The heat exchange tubes can be placed on the tube sheet according to an equilateral triangle or a square. Equilateral triangles are placed compactly, the fluid outside the tube has a high degree of turbulence, and the heat transfer coefficient is large; square placement is convenient for cleaning outside the tube, which is suitable for fluids that are prone to scaling. Each time the fluid passes

  • Detailed characteristics of vortex hot film heat exchangers

    The vortex heat film heat exchanger uses the latest stainless steel heat exchanger with vortex heat film heat transfer skills. The heat transfer effect is added by changing the movement of the fluid. When the medium passes the surface of the vortex tube, the surface of the tube is strongly washed, and then the heat transfer efficiency is improved. Up to 10000W / m2 ℃. Vortex hot film heat exchanger This structure has the functions of corrosion resistance, high temperature resistance, high pressure resistance, and anti-scaling. The fluid channels of other types of heat exchangers are fixed directional flow methods, which form a flow around the surface of the heat exchange tube, and the convective heat transfer coefficient decreases. The biggest feature of the vortex hot film heat exchanger is that the economy and safety are consistent. Because the active connection between the heat exchange tubes, the heat exchange tubes and the shell is considered, the turbulence is no longer forced by the baffle to force the obstruction, but the natural induction between the heat exchange tubes constitutes

  • What is the raw material for stainless steel heat exchanger

    The stainless steel heat exchanger is a heat exchanger using stainless steel as the raw material. It has very good oxidation resistance, safety and hygiene. It is widely used in food, medicine, heating, daily water, air conditioning and return water. According to the materials of the heat exchange equipment implementation center, the stainless steel heat exchanger has a more outstanding heat transfer effect than the traditional carbon steel heat exchanger, and has a longer service life. Stainless steel heat exchangers were widely used in many areas at the time. The heat exchangers were made of food-grade stainless steel and had very good anti-rust and anti-scale properties. The first regions where stainless steel heat exchangers are produced in China are Shandong and Jiangsu. These two provinces are the largest provinces producing pressure vessels. The scale of the enterprise is relatively large, and the planning and production capabilities are outstanding. Wide application conditions, suitable for larger pressure

  • Different types of heat exchangers are introduced separately

    Domestic heat exchangers solve the problem of hot water for group heating homes and winter. It works on the same principle as a heat exchanger for group heating. Only the size and style are different. Can be divided into cast iron type, barrel type, steel type, water storage type, plate type. Works great. Cast-iron cast-iron is large and heavy. However, the copper pipes inside can be opened and inspected before buying, which is not easy to be deceived by the merchants, and the copper pipes can be replaced if they are broken after a few years. The barrel type is small in size and high in AC power. But the user cannot check the length of the copper tube inside, nor can it replace the copper tube, and it is not very pretty. Steel type Steel types come in different sizes. The user cannot check the length of the copper tube inside, and cannot replace the copper tube. But it's pretty. Plate type Plate type, small volume, small portion

  • The effect and device of the cooler of the four-column four-column hydraulic machine

    When the temperature of the four-column hydraulic machine reaches a certain level, it will cause damage to the oil cylinder seals, present an oil leakage condition, affect normal production processing, and form a shutdown. On a hot summer day, the average daily temperature can reach 40 degrees, but the cooling of the 2,500 tons of glass steel septic tank forming four-column hydraulic machine that is constantly operating is the top priority, otherwise it will cause damage due to the temperature rise of the machine. Here we will introduce the effect and installation method of the cooler of the four-column four-column hydraulic machine. The cooler is installed at the overflow port of the main relief valve. The characteristics of this device method are: the hot oil generated by the overflow valve is cooled directly or without being affected by the system's impact pressure, the check valve has a maintenance effect, and the shut-off valve can directly return the hydraulic oil to the tank when it is started . The cooling device is on the main oil return path. This outfit

  • What is the difference between a plate cooler and a plate heat exchanger

    Plate cooler What we can understand from the title is the heat exchanger used for cooling, so what is the difference between it and the plate heat exchanger? In terms of shape and structure, it is the same as the plate heat exchanger. The plate heat exchanger is used for heat exchange, and can be used for cooling, and it can also be used for cooling. A lot of thermal energy occurs in the operation of industrial equipment. This will shorten the service life of the machine for a long time. Therefore, people often need to rely on a cooler to cool the equipment. Common coolers include gas coolers and liquid coolers. The operating principle of Hefei Kuanxin Plate Cooler is as follows: Because the chilled water (refrigerant fluid) and the circulating cooling water (working fluid) are not directly touched, they pass the heat of the circulating cooling water to the chilled water through the heat exchange sheet, which is higher at the moment Cyclic cold

  • The right way to buy an air cooler

    Depending on the direction of air movement, the air cooler can be connected in parallel or in series. Generally, when there is a large amount of passing air, parallel connection should be selected; when large air temperature drop is required, it should be connected in series. For air coolers connected in parallel, the water supply pipes should also be connected in parallel; for air coolers connected in series, the water supply pipes should also be connected in series. Cold water and air should be reversed. In the air cooler, air and refrigerant should move in the opposite direction. The mass flow rate of the top wind surface is generally 2.5-3.5kg / (㎡.s). When the mass flow rate is greater than 3kg / (㎡.s), it is behind the cooler. Fenders should be added. For coolers with water spray equipment, fenders should generally be installed. The cold water inlet temperature of the air cooler should be at least 3.5 ℃ lower than the dry bulb temperature of the air outlet. The cold water temperature rise should be 5-10 ℃, and the flow rate should be 0.6-1.5m / s.

  • Cleaning the air cooler improves operation efficiency

    In order to reduce the exhaust pressure of the steam turbine, the air separation workshop improves the heat exchange effect of the air cooler fins. The workshop organizes employees to clean the air cooler. It is the season when the spring flowers are blooming and the trees are germinating. The floating catkins have a serious impact on the normal operation of the air separation equipment. As a result, the exhaust pressure of the steam turbine increases, and the load on the air cooler fan increases, which causes the heat transfer effect of the air cooler to drop sharply. For this reason, the workshop immediately launched a summer operation plan to completely clean the air cooler and use high-pressure water pumps to remove catkins from the gaps in the heat exchanger fins. The workshop organized each operating team to use the sub-shift time, under the leadership of the workshop technicians, opened catkins to eliminate the action. First connect the air cooler flush line

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