SU1252648A1 - Device for pulsed removal of surface deposits from roller heat surfaces - Google Patents

Description

one

The invention relates to a technique for cleaning the heating surfaces of heat exchangers and can be used for cleaning boilers from external deposits.

The purpose of the invention is to simplify the design of the device and improve its operational reliability.

The drawing shows the device a General view.

The device contains a fixedly fixed combustion chamber 1 with a mixed conductor 2 and a pilot light 3 attached to it, and an exhaust nozzle A is attached to the other end of the chamber and directed to the heating surfaces 5 to be cleaned. The exhaust nozzle is inserted through the brickwork of the boiler 6 and is closed with a protective casing 7. The exhaust nozzle is made bimetallic CMM and is made up of two parts rigidly connected along the generatrix made of materials with different coefficients of linear expansion.

In the initial (initial) position, the axis of the exhaust nozzle is directed, depending on the size of the sediments, to one of the extreme positions

The device works as follows.

Along the mixing line 2, the fuel-air mixture is supplied to the chamber 1, which periodically with a certain frequency is ignited by the igniter 3. A portion of the mixture, which burns in an explosive mode, creates pressure in the chamber 1

Editor M.Blanar

Compiled by V.Slyshkin Tehred I.Veres

Order 4614/42

Circulation 589 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

ten

52648I

which the products of combustion through the exhaust nozzle 4 are thrown on the object to be cleaned. After warming up and stabilization of the 1 and the mode, according to the program developed in advance during the adjustment process, the flow rate of the mixture into the chamber is increased and the frequency (periodicity) of the igniter switch is adjusted accordingly, providing the wave power required for the destruction and removal of deposits. In this case, due to the directivity of the radiation of the waves, the maximum effect on the deposition occurs along the axis of the exhaust nozzle, which, as it warms up, bends, changing the direction of radiation on the surface of the cleaned heat exchangers. After the completion of the cleaning cycle, the chamber turns off (the mixture supply stops and the control circuit is turned off) and the exhaust nozzle, after cooling, returns to the initial position. To reduce noise at the service mark and eliminate air suction into the boiler, the exhaust nozzle is closed by a protective cover 7.

(five

25

The use of the proposed device with an exhaust bimetallic nozzle makes it possible to extremely simplify the design of the mechanism for moving the nozzle, increase the reliability of operation of the cleaning device, and also, by moving the exhaust nozzle, increase the cleaning area of the tether guns.

Proofreader A.T. sko

Claims (1)

DEVICE FOR PULSE CLEANING SURFACE OF HEATING BOILERS FROM EXTERNAL DEPOSITS, containing a combustion chamber, means for supplying the air-fuel mixture and an exhaust nozzle mounted for rotation, characterized in that, in order to simplify the design and increase reliability, the exhaust nozzle is made integral in length rigidly connected two parts made of materials with different linear expansion coefficients.