SU691641A1 - Apparatus for cleaning convecting surfaces of a boiler - Google Patents

Description

I

The invention relates to devices for cleaning convective-surfaces of boilers and can be used in power engineering, in particular in boiler building.

Fractional purification devices are known that contain chaff fractions with retarders in a spreader, which is a vertical hollow tube, often in the volume of theta l.

The shot chute is cooled by suction of atmospheric air through the horses of the hollow tubes, which are located outside the working volume of the boiler.

Insufficient cooling of the chyuby chute does not provide the necessary heat dissipation from the chute chute walls and temperature uniformity over the chute chute height. As a result, there is a distortion of the chute fraction and its distortion. The closest technical solution to the invention is a fractional cleaning device for convective hSH sumps of a kotp containing a chute in the form of a jacketed cooling

Day of the cylindrical body with the spreader 2 installed on its face. Cooling of the shot is performed by high pressure at the expense of the boiler and cooling water inlet through the nozzle located in the boiler working volume and drainage of the water through the nozzle pacJi placed outside the volume of the boiler.

In the atom case, since the water on the shot chute shell is introduced into the overall system of the boiler, the reliability of its operation decreases and the probability of its failure increases;

The use of low water pressure leads to large temperature irregularities, low-temperature corrosion, local overheating and rapid cooling system failure, i.e. low service life.

Claims (2)

The purpose of the invention is to increase the service life of the shot chute by introducing an intermediate cooling circuit. This goal is achieved by the fact that the device for cleaning convection surfaces of the boiler, containing the shot chute in the form of a cylindrical case equipped with a cool jacket with a spreader mounted on its end, is fitted with FIG. 1 schematically shows the proposed device; in fig. 2 is a device variant. The device consists of a chute shot, the case 1 of which is made in the form of a hollow tube with retarders .2 located in its thread parts. The housing 1 in its upper part is equipped with a cooling water jacket 3 with a nozzle 4 for the entry of running water and a nozzle 5 for its exit. The water on the jacket 3 with the upper part of the body is placed outside the volume of the boiler Between the water jacket 3 and the housing 1 with a hermetic clearance of the center: but the casing 6 is tightly installed along the entire length of the heat sink. The tightness is achieved by the annular plugs 7 between the two pipes. The sealed gap is partially filled with water and forms an intermediate cooling circuit. To the casing 6 is a yvorivan suspension 8, on which a spherical spreader 9 is mounted along the axis of the stream, the device operates as follows. Fraction is supplied through the upper o-go CTtie of body 1, 3; on the retarder 1X 2 and, reflecting from the spherical surface of the spreader 9, go to the convective surfaces of the boiler, cleaning them.-. .., -. Since the lower part of the housing 1 is in the volume of the boiler, the hot gases warm the water that is in the gorm-nickle gap. The water boils and partially evaporates. A steam rises to the upper part of the body, where it condenses on the walls, giving off heat to the running water circulating in the water jacket. The condensate flows down the walls and the process is repeated continuously. Presented in FIG. 2, the device is characterized in that the fraction is not fed from above, but through the lateral branch 10, which is a inclined pipe. V In the upper part of the housing 1, a further cooling cavity 11 is formed by installing a choke. 12 for inlet of running water. This nolost is separated by a partition 13 from the total volume of the body. In the upper part of the cavity, a fitting 14 is installed for the discharge of flowing water. In this device, it is possible to intensify the heat of the coolant water, enclosed in an airtight gap, by additionally cooling the cavity of each cavity ...; . The proposed device for the fractional cleaning of cat convective surfaces has the following advantages as compared with the known constructions; - since the intermediate coolant is in a state of saturation, the temperature of the body walls along the entire length in the boiler volume is almost unchanged, eliminating the possibility of deformation, twisting and orientation changes in the space of the flow chute, consequently. What improves the mode of external cleaning of the convective surfaces of the boiler; - thanks to the possibility of regulati-. neither the heat removal in the secondary circuit maintains such a temperature of the walls of the casing at which neither high-temperature nor low-temperature occurs; corrosion, which increases the service life of shot cleaning devices. Claims with a device for cleaning convective surfaces of a boiler, containing a fraction chute in the form of a cylindrical body with a cooling jacket with a spreader mounted on its torn, differential. It is so that, with an increase in service life, it is equipped with a concentric heat sink and a space between the cooling jacket and. enclosure sealed and sealed with a water jacket. Sources of information taken into account in the examination 1.Uspensky V. A ,. Pneumatic T1zansport, Sverdlovsk, 19S9, p. sixteen, 2.Catalogue Device for cleaning the heating surfaces of steam boilers, SR, Ilmarshe, 1959, p. 18,