Heat exchanger tubular: description, characteristics, device and reviews

For the purpose of cooling liquids, special devices are used, which are called heat exchangers. They are able to work with juices, milk and various oils. The main device pairs include performance and throughput. Additionally, the dimensions of the device are taken into account. In order to learn more about heat exchangers, it is worth considering their structure and operating principle.

Tubular heat exchangers: device and operating principle

A conventional heat exchanger consists of tubes and a compensator. There is a cover in the side of the case. Tubes for models are fixed on the racks. The thermal insulation layer is attached to the tubular heat exchanger. The principle of operation of devices is based on the removal of liquid through the coolant. Initially, the substance enters the inlet branch pipe. The cooling rate in this case depends on the initial temperature of the liquid. In addition, the length and diameter of the pipes are taken into account. To increase the tightness of structures, special clamping rings are used.

Types of heat exchangers

By design, tubular-lamellar, cross-flow, straight flow, and countercurrent models are distinguished. Pipes can be in a vertical or horizontal position. In addition, the separation of devices occurs over the width of the compensators.

Tubular lamellar modifications

Tubular plate heat exchangers are characterized by good performance. For pasteurization of juices, models are often used. Basically they are made with tubes of small diameter. The lids are made of steel. In some cases, the models have three racks. The average capacity is 20 liters per minute. Also it is worth noting that in the stores there are modifications with adapters.

Casing, as a rule, is used with linings. The devices differ greatly in diameter of the nozzles. In the front of the modifications there are small flanges. Sealing rings are used to protect the models. Stand heat exchangers tubular (market price) about 120 thousand rubles.

Features of horizontal modifications

Models of this type are the most common. For industrial enterprises the heat exchanger tubular (horizontal) is remarkably suitable. The conductivity index of the models, as a rule, does not exceed 130 liters per minute. A tube heat exchanger is often found in dairies. Pipes in this case are fixed on special plates.

Some enterprises are installing modifications on wide stands. Heat exchanging tubes are used in different diameters. Flanges, as a rule, are in front of the structures next to the covers. The temperature of the coolant in this case depends on the capacity of the model. The branch pipes are connected to the adapters. The manufacture of tubular heat exchangers is mainly established in the USA.

Vertical device parameters

Heat exchanger tubular with a vertical arrangement of pipes is suitable only for pasteurization of viscous oils. Models have very low throughput. Also worth noting that the stores are modifications to two racks. In some cases, models come with a stand. Flanges are installed behind the covers. Directly heat exchange tubes are made of steel. Many models have several O-rings. It is also worth noting that clamps are installed to fix the casing to the tubular heat exchanger. The cost of equipment depends on the dimensions of the device, as well as the material of the cylinder.

Countercurrent modifications

Counterflow heat exchanger tubular operates at a pressure of 4 Pa. Tubes for models are installed in a horizontal position. On average, the throughput is at 140 liters of fluid per minute. Also worth noting that there are modifications with two racks. Lids most often produced a small diameter. Nipples are used from stainless steel, but there are also brass analogues.

Many modifications can boast of excellent performance. Heat exchangers of this type are well suited for the pasteurization of vegetable oil. Some experts say that the models have good tightness. However, they have several drawbacks. First of all, we are talking about large sizes. In addition, it is important to take into account the complex maintenance of these units, since the racks need to be replaced periodically. It is also necessary to constantly check the strength of the flange.

Device of co-current heat exchangers

Direct-flow heat exchangers are characterized by good throughput. The outlet nozzles at them are established in diameter from 2 see In some cases wide compensators are used. Also worth noting that the stores have modifications on the plates.

The capacity at them is equal to 130 liters of liquid per hour. If we consider a tubular heat exchanger water-to-water, then it has a limiting pressure of 4 Pa. Security systems in devices are used in different classes. If you believe the experts, the conductivity depends not only on the diameter of the pipes, but also on the length of the cylinder. Enclosures in devices are of high density.

Models with a wide compensator

Heat exchangers with wide expansion joints are great for running oil. The maximum pressure at them starts from 3 Pa. Protection systems are mainly used in class P23. Separate removal from modifications deserve an adapter. Covers are made of stainless steel and are connected by screw method. Very rarely there are devices on two racks. First of all, they have unstable plates. Also it is worth noting that there are modifications with a front flange arrangement. Sealing rings are fixed behind the adapters.

Reviews about models with narrow compensator

Heat exchangers with a narrow compensator are not bad for pasteurization of milk. The tubes are arranged horizontally. Many experts say that the devices are most often produced on 6 tubes. They have medium-density casing. Special attention should be paid to the performance of the models. The specified parameter basically does not exceed 120 liters per hour.

Additionally, the conductivity of the model is taken into account, which depends on the diameter of the cylinder. In order to choose a quality heat exchanger, it is worth paying attention to the sealing devices. Many heat exchangers are manufactured with several locking rings. Due to this, a high degree of security is achieved.

Modifications to 6 tubes

Heat exchangers for 6 tubes are capable of showing good performance. If their diameter is less than 2.3 cm, then certain conduction problems may occur. The operating temperature in heat exchangers of this type averages 10 degrees. Cylinders are most often made of brass. Also in the market there are cast-iron models that weigh a lot and are bulky.

Model parameters for 8 tubes

Heat exchangers for 8 tubes are suitable for cooling not only oils, but also high-density liquids. The productivity of the models averages 110 liters per hour. Typically, the diameter of the pipes for the modifications is 3.3 cm. Many models are manufactured with several flanges. Separate attention in devices deserve seals, which are fixed on the rings. Modern heat exchangers are made on three rings. In this case, the flange should be located in the front part of the modification.

Heat exchangers with double thermal insulation

What is the difference between double-insulated heat exchangers? First of all, they have a very low operating temperature. Also worth noting that they are great for working with oils and milk. Many modifications are used in large enterprises. For today, devices for 6 and 8 pipes are produced. In the first case, the productivity averages 120 liters per hour with a diameter of at least 2.2 cm.

Modifications to 8 pipes with a double seal are able to boast good conductivity. They are most like for high-density liquids. Modifications to two racks are used for the pasteurization of milk in large quantities. Still there are models with a vertical arrangement of pipes.

Modifications without compensator

Tubular stainless heat exchangers without compensator are unable to work with oils. Also worth noting is that they have low performance. However, the advantage of the models is the rapid cooling of liquids. Devices are well suited for pasteurizing juices.

Flanges are installed in front of them. It is also worth noting that the models are produced in two and three racks. Cylinders are made of cast iron or steel. The average diameter of the pipes is 2.4 cm. Sealing nuts are fixed to the posts. Devices with high performance are available with additional slats.