SU962748A1 - Apparatus for cleaning heating surfaces - Google Patents

Description

() DEVICE FOR CLEANING HEATING SURFACES

one

The invention relates to industrial heat technology, in particular to cleaning the heating surfaces of steam and hot water boilers from external deposits, and can be used in power engineering installations of the chemical and metallurgical industries, as well as in power engineering.

A device for cleaning the heating-up surface of deposits is known, containing a source of vibration, made in the form of an explosion chamber, a pipeline for supplying the air-fuel mixture and a source of ignition of the mixture, connected to the screen surfaces with a means of returning it to its original position. .

However, the device has insufficient performance and limited application. The mobile chamber requires compaction of its attachment to the recovery boiler.

which causes great difficulties when working on high-temperature aggressive gazdh.

The variety of sediment properties requires different designs of devices for cleaning heating surfaces.

The purpose of the invention is to increase the cleaning efficiency of screen and screen heating surfaces.

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ten

This goal is achieved by the fact that, in the device for cleaning heating surfaces, the explosion chamber is provided with a container housed therein coaxially and connected to the pipeline of the air-fuel mixture, with one end of the container having a piston spring-loaded to the heating surface and connected to the thrust.

This design allows

Claims (2)

20 of the blast wave energy used for mechanical action on the heating surface. In this way, the effect of simultaneous cleaning of screen and screen surfaces, heating is achieved, both due to the indirect effect of the blast wave and by shaking the screen surfaces when moving the movable piston. In addition, by limiting the movement of the movable piston, it is possible with the possibility of redistributing the explosion energy of the air-fuel mixture, which expands the range of effective operation of the impulse-impact cleaning installations. The drawing schematically shows the proposed device. The device consists of the main. 1 and 2 preliminary blasting chambers, a fuel-air mixture piping 3, an ignition source, a mixer 5, pipelines 6 and 7 of the primary air-fuel mixture 1 and 2 preliminary chambers connected by a pipe 8, on which the ignition source 4 is installed. The preliminary chamber 2 is installed inside the main chamber 1 in such a way that their side walls form slotted output channels 9 of the device. The rec 10 of the preliminary chamber 02, which is oriented inside the main chamber, is open. The end of the 11 auxiliary camera 2 from the surface. 12, the heating of the boiler is closed by a movable piston 13 connected to the rod AND, in turn, associated with the screen heating surfaces 15. Stock It is equipped with a return spring 1b. A device for cleaning heating surfaces works as follows. By the fuel line, gas 5 enters the mixer, where it is mixed with air. From the mixer 5, the fuel-air mixture passes through pipelines 6 and 7 to the main 1 and preliminary 2 chambers. After the explosive chambers are filled with an air-gas mixture, the ignition source is ignited by the ignition source k in the pipe 8. The plum through pipes 6 and 7 enters the explosive chambers, where the air-breathing mixture located there is ignited. Due to the different length of the path traveled by the flame through the pipelines, the ignition in the pre-chamber 2 occurs somewhat earlier than in the main chamber 1, therefore, in the latter, the pressure rises before ignition. Due to the increased pressure, the combustion of the mixture in the main chamber 1 is of detonation nature. The blast wave leaving the channel 9 of the device has a directional effect and more effectively cleans the heating surfaces. Increasing the pressure in the pre-j aMepe 1 when burning the gas-air mixture there causes an abrupt movement of the movable piston 13, vyzych-, va shaking the flat surfaces 15. The gases escaping through the end 11 of the auxiliary chamber 2 during movement of the movable piston 13, block the output channel , preventing the outflow of gas-air mixture from chamber 1, and contributes to a more complete use of the explosion energy in the auxiliary chamber 2. The explosion in the main chamber 1, in addition to the directional impact of the blast wave on the screen and screen heating surfaces, affects the shaking system of the heating screen surfaces, including the movable piston 13, the rod 1 connected to the screens 15- The return spring 16 returns the piston 13 initial position after installation is completed. By varying the stiffness of the spring 16, or by installing stoppers that limit the amount of movement of the movable piston 13, it is possible to redistribute the blast energy to the shaking and blowing of the screens. The use of the proposed device increases the cleaning efficiency of the heating surfaces due to the combined effect, expands the range of effective effect on the zone of radiation-convective heat exchange, provides the required gas density and minimal disruption of the process parameters. Apparatus of the Invention A device for cleaning heating surfaces, mainly boiler surfaces, including a source of oscillations made in the form of an explosion chamber, a pipeline for supplying an air-fuel mixture and a source of ignition for the mixture connected with the screen surfaces with return means, its initial position, characterized by 4TOi in order to increase the cleaning efficiency, the explosion chamber is provided with a container housed therein coaxially and connected to the fuel / air pipelines oh mixture, aezy js wherein one end of the container has a piston spring loaded towards the heating surface, and associated with the draft type. Sources of information taken into account prior expert review i. USSR Author's Certificate No. 92723, class, F 28 G 13/00, 1972.