A biomass heating system for burning fuel in the form of pellets and/or wood chips is disclosed, the system comprising the following: a boiler with a combustion device, a heat exchanger with a plurality of boiler tubes, wherein the combustion device comprises: a combustion chamber with a rotating grate, with a primary combustion zone and with a secondary combustion zone; wherein the primary combustion zone is enclosed by a plurality of combustion chamber bricks laterally and by the rotating grate from below; wherein a plurality of secondary air nozzles is provided in the combustion chamber bricks; wherein the primary combustion zone and the secondary combustion zone are separated at the level of the secondary air nozzles; wherein the secondary combustion zone of the combustion chamber is fluidically connected to an inlet of the heat exchanger.

A rotating grate for a biomass heating system is disclosed, the grate comprising: at least one rotating grate element; at least one bearing axle, by means of which the rotating grate element is rotatably mounted; at least one cleaning device attached to one of the rotating grate elements, wherein the cleaning device comprises a mass element movable relative to the rotating grate element; wherein the cleaning device is arranged in such a way that, upon rotation of the rotating grate element, an acceleration movement of the mass element is initiated so that the cleaning device exerts a knocking effect on the rotating grate element in order to clean the rotating grate element.

A biomass heating system for firing fuel in the form of pellets and/or wood chips is disclosed, comprising: a boiler with a combustion device; a heat exchanger with an inlet and an outlet; wherein the combustion device comprises a combustion chamber with a primary combustion zone and with a secondary combustion zone provided downstream thereof; the combustion device having a rotating grate on which the fuel can be burned; the secondary combustion zone of the combustion chamber being fluidically connected to the inlet of the heat exchanger the primary combustion zone being laterally enclosed by a plurality of combustion chamber bricks.

A closed-loop control system for intelligent soot blowing of a utility boiler is provided, including an intelligent soot blowing server, a distributed control system, a physical isolation device, a client and a heating surface soot blower group, where the intelligent soot blowing server communicates with the DCS via the physical isolation device, reads data from the DCS, and sends a soot blowing alarm signal or a soot blowing control signal to the DCS after processing the data; the client and the heating surface soot blower group establish communication links with the DCS separately; a program and a control flow of the closed-loop control system for intelligent soot blowing is developed; a time protection soot blowing flow for a heating surface of an air pre-heater is set in the control flow; a screen of the closed-loop control system for intelligent soot blowing is set up and installed in the DCS.

A device for generating pressure waves of high amplitude, in particular for boiler cleaning, has a pressure-resistant container (21, 40) with a combustion chamber (121) inserted therein, which can be filled with a flowable burn-off material via supply lines. The pressure-resistant container has a discharge opening (306) for the directional discharge of gas pressure generated by ignition of the combustible material. A piston (70) closes the discharge opening, can release it for directional discharge and can be pushed back into the initial position by a spring device. With respect to its longitudinal direction (305), the seat of the piston (70) has a piston surface (302) inclined obliquely to the discharge opening (306), which is arranged opposite a housing surface (303) also inclined obliquely to the discharge opening (306), the housing surface (303) opening opposite the piston surface (302) at an angle (304) oriented towards the discharge opening (306) from a closure line (65) oriented perpendicularly to the piston direction (90).

In a soot blower, a heat transfer tube of a heat exchanger is arranged inside a pressure vessel, and gas for cleaning is injected toward the heat transfer tube from an injection pipe movable into and out of the pressure vessel. The soot blower includes a cylindrical casing provided to surround an insertion hole on the pressure vessel side into which the injection pipe is inserted, to extend outside the pressure vessel, the injection pipe being inserted into an inside of the casing; a support part provided inside the casing to guide movement of the injection pipe and to ensure airtightness between the casing and the injection pipe; and a gas supplying device provided immediately close to the support part to generate a jet stream of gas in a portion of the injection pipe that projects to the pressure vessel side.

A system for cleaning heat exchange tubes includes one or more cleaning robots that are assembled with the tubes. Each cleaning robot includes a housing having an opening extending therethrough for receiving one of the heat exchange tubes, a scraper blade extending into the opening of the housing, the scraper blade having an inner scraping edge that opposes the outer surface of one of the tubes, a wheel coupled with the housing for rolling over the outer surface of the tube, and a motor for driving rotation of the wheel to move the cleaning robot over the outer surface of the tube. The system includes a system controller with one or more microprocessors and one or more software programs for monitoring and controlling operation of the cleaning robots.

A boiler ash remover based on a combined flow includes a frequency-adjustable acoustic flow generator, a fixing bracket, a compressed air source, a three-way air-source electric-control valve, an air jet generator, an acoustic-jet combined transmission tube, an acoustic jet intelligent control system, and a scale measurement and control sensor. The compressed air source is connected to an inlet end of the three-way air-source electric-control valve. An outlet end of the three-way air-source electric-control valve is connected to the frequency-adjustable acoustic flow generator and an air source inlet end of the air jet generator respectively. An acoustic flow outlet end of the frequency-adjustable acoustic flow generator is connected to an inlet end of the acoustic-jet combined transmission tube. An outlet end of the acoustic-jet combined transmission tube and a jet outlet end of the air jet generator are both disposed opposite to an external heat exchange component by means of the fixing bracket. The area of an acoustic flow transmission orifice at the outlet end of the acoustic-jet combined transmission tube covers that of a jet injection orifice at the jet outlet end of the air jet generator. The acoustic jet intelligent control system is connected to an electric control device of the three-way air-source electric-control valve and the scale measurement and control sensor respectively. The scale measurement and control sensor is disposed on the external heat exchange component. The boiler ash remover has the advantages of combining a frequency-adjustable acoustic flow with an air jet and implementing acoustic jet intelligent control, and has a desirable effect of removal of scales in a hearth or a flue gas heat exchanger.

In a method for protecting heat exchanger pipe in boiler systems having at least one heat exchanger pipe, which is surrounded by a ceramic component, into which flue gas is directed from at least two opposite sides, gas is introduced between the heat exchanger pipe and the ceramic component.

Disclosed is a process for cleaning a boiler, wherein, while fumes are emitted in a combustion chamber of the boiler and circulate up to exchangers of the boiler, an aqueous solution of dissolved magnesium chloride and/or sulfate and/or dissolved calcium chloride is injected into the combustion chamber in the form of droplets which, by vaporization of the water of the aqueous solution, then thermal decomposition, are transformed in the combustion chamber into magnesium and/or calcium oxide particles reacting in the combustion chamber by mixing with molten salts and/or molten oxides, present in the fumes, to crystallize these molten salts and/or to vitrify these molten oxides before these molten salts and/or these molten oxides come into contact with the exchangers. Also disclosed is a device for implementing this process and a boiler equipped with this device.