RU183751U1 - Heat exchanger - Google Patents

Abstract

The utility model can be used as a heat exchange device for a hot air generator, applicable for heating industrial premises, including rooms located in the immediate vicinity of wells, and both gaseous and liquid fuels can be used as fuel. The heat exchange device comprises a combustion chamber, a tubular heat exchanger with inlet and outlet manifolds at its ends. The combustion chamber is connected to a tubular heat exchanger through an inlet manifold. The front end of the combustion chamber is equipped with a removable cover. A removable cover is installed on the inlet manifold opposite the tubular heat exchanger. A removable cover is installed on the outlet manifold of the tubular heat exchanger. By installing removable covers, it is possible to clean the inner surfaces of the combustion chamber and heat exchanger from soot. 2 s.p. f-ly; 5 ill.

Description

The utility model relates to heat engineering, to devices for autonomous heating and ventilation of air. It can be used as a heat exchange device for a hot air generator. It may be applicable for heating industrial premises, including for heating industrial premises located in close proximity to wells, where both gas and liquid fuel can be used as fuel.

A recuperative revolving type air heater according to the RF patent for invention No. 2520274, F23L15 / 04, 2014 is known. The air heater comprises a cylindrical body with nozzles for air inlet and outlet, a combustion chamber in the form of a cylindrical glass with a heat exchanger made of pipes installed in collectors and located parallel to the surface of the cylindrical combustion chamber. The inlet manifold is connected to the combustion chamber, and the outlet manifold is located on the opposite side, and is connected to the chimney. The disadvantage is the formation of soot on the inner surface of the pipes of the heat exchanger and the combustion chamber, which reduces the efficiency of heating the air. The design of the air heater does not provide for the possibility of cleaning the internal surfaces of the device from carbon deposits.

Known heat exchange module according to the patent of the Russian Federation for the invention No. 2451245, F24H 3/00, 2012, comprising a housing with inlet and outlet openings. The housing contains a combustion chamber, a heat exchanger, a rotary chamber, a partition. When burning fuel, the resulting flue gases move through the combustion chamber, enter the inlet manifold, pass through a convective heat exchanger, enter the outlet manifold and are discharged into the chimney. In this case, the formation of soot on the inner surfaces of the combustion chamber and heat exchanger is not excluded. As the formation of soot occurs, the cross-sectional area of the heat exchanger elements decreases, the hydraulic losses of the working medium flow inside the heat exchanger increase, and the efficiency of the heat-exchange module decreases. The disadvantage is the decrease in the efficiency of the device due to the formation of soot.

As the closest analogue to the claimed technical solution, a highly efficient heat exchanger for boilers and hot air generators according to EP 2884201, F24H 3/065, 2014 is selected. The heat exchanger comprises a combustion chamber configured to install a burner on it. A plurality of heat exchanger tubes are connected to the combustion chamber and to each other via manifolds. The collectors are made in the form of plates, one of the collectors is designed for the release of combustion products. Each heat exchanger tube has a flattened shape along its entire length. The combustion chamber has a cylindrical body. The disadvantage is the difficulty of cleaning the inner surfaces of the combustion chamber and flattened tubes of the heat exchanger from soot. Carbon deposit, overlapping the internal section of flattened tubes, reduces the efficiency of the device. If the tubes are not cleaned, a complete failure of the device may occur.

The technical task of the claimed utility model is to increase the efficiency and reliability of the heat exchange device.

The technical result consists in providing the possibility of cleaning the carbon deposits of the internal surfaces of the combustion chamber and heat exchanger.

The technical result is achieved due to the fact that in the heat exchanger containing the combustion chamber, a tubular heat exchanger with inlet and outlet headers at its ends, the combustion chamber is connected to the tubular heat exchanger through the inlet manifold, according to a utility model, the front end of the combustion chamber is equipped with a removable cover, a removable cover is installed in the outlet manifold of the tubular heat exchanger, a removable cover is installed on the inlet manifold, opposite the tubular heat exchanger.

In addition, removable covers are made with flanges. Basalt seals are installed under the removable covers.

The technical result is provided due to the fact that the combustion chamber and the tubular heat exchanger are equipped with removable covers. The implementation of the front end of the combustion chamber with a removable cover allows you to clean the inner surface of carbon deposits. The cover of the combustion chamber has a large diameter, when removing the removable cover, it is possible to access the inner side parts of the combustion chamber and to the rear end part, which allows it to be completely cleaned. Installing a removable cover on the outlet manifold of the tubular heat exchanger allows you to clean the inner surfaces of the tube bundle of the heat exchanger when removing the removable cover. Cleaning is mainly carried out with a brush attached to the bar. The front end of the combustion chamber, on which the burner is installed, and the output manifold of the tubular heat exchanger are located on the front side of the heat exchanger. The back of the device is deaf. Installing a removable cover on the back, on the inlet manifold, opposite the tubular heat exchanger, allows you to remove all debris that has crumbled there when cleaning the tube bundle. By providing the ability to remove carbon from all the internal surfaces of the heat exchanger, the cross-sectional area of the pipes along which the coolant moves increases hydraulic losses, the efficiency and reliability of the device.

The figure 1 presents an axonometric image of a heat exchange device.

The figure 2 presents the main view of the heat exchange device.

The figure 3 presents a front view of a heat exchange device.

The figure 4 presents a section of the cover of the combustion chamber of a heat exchanger.

The figure 5 presents a section of the cover of the collector of the heat exchange device.

The heat exchanger device contains a combustion chamber 1, a tubular heat exchanger 2, an inlet manifold 3, an outlet manifold 4. A removable cover 5 is mounted on the combustion chamber 1, on which a power flange 6 is located for connecting the burner, an eye 7 is made on the cover 5 for visual control of the flame. An integral, removable cover 8. is installed on the input manifold 3. The removable cover 8 is located opposite the pipes of the heat exchanger 2, at its rear end. On the output manifold 4, a removable cover 9 with a central pipe 10 for connecting the chimney is installed. The removable covers 5, 8, 9 are fastened with threaded elements 11. The removable covers 5, 8, 9 are made with flanges 12, 13 in the form of bends for installation and pressing of the seals 14, 15 which can be used as basalt cords.

The heat exchange device operates as follows.

A burner is mounted on the power flange 6 of the removable cover 5 of the combustion chamber 1. On the pipe 10 of the removable cover 9 install a chimney. As fuel for the burner can use oil, natural or liquefied gas, diesel fuel. The fuel in a mixture with the required amount of air is fed by the burner into the combustion chamber 1, where it is burned. The resulting combustion products pass from the combustion chamber 1 into the inlet manifold 3, and then pass through the convective part of the device — the tubular heat exchanger 2. In this case, the heat from the combustion of fuel through the pipe walls of the heat exchanger 2 is transferred to the heated air flowing around the heat exchanger outside. Flue gases are led out through the chimney. As a result of burning fuel, for example, oil, carbon deposits are formed on the inner surfaces of the heat exchanger device, and the device’s operating efficiency is reduced. To remove carbon deposits, remove the burner, power flange 6, chimney and removable covers 5, 8, 9. Carbon is cleaned of the internal surfaces of the combustion chamber 1. Through the holes in the pipes of the heat exchanger 2, the internal surfaces of the pipes are cleaned. Cleaning is carried out with a metal brush fixed on the bar until a metallic sheen appears. Particles of carbon deposited during cleaning at the rear of the device are removed from the inlet manifold 3. A vacuum cleaner may be used for cleaning. At the end of cleaning, install all parts in the reverse order.

The utility model allows cleaning the carbon deposits of the internal surfaces of the combustion chamber and the heat exchanger, which in turn improves the efficiency and reliability of the heat exchanger.

Claims (3)

1. A heat exchanger containing a combustion chamber, a tubular heat exchanger with inlet and outlet manifolds at its ends, the combustion chamber is connected to the tubular heat exchanger through an inlet manifold, characterized in that the front end of the combustion chamber is provided with a removable cover, a removable is installed on the inlet manifold opposite the tubular heat exchanger a cover; a removable cover is installed on the outlet manifold of the tubular heat exchanger. 2. The heat exchange device according to claim 1, characterized in that the removable covers are made with flanges. 3. The heat exchange device according to claim 1, characterized in that basaltic seals are installed under the removable covers.

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