A heat exchanger cleaning device is provided. The cleaning device includes a drive motor configured to rotate a gearbox, a slip clutch, and a support beam about a first axis. The support beam carries a thread rod, a second motor, and one or more carriage assemblies. The carriage assemblies move linearly as the second motor rotates the threaded rod. The carriage assemblies include a support tube for receiving an ultra-high pressure tube therethrough. The carriage assemblies adjust relative to the heat exchanger such that the UHP tube may be inserted through the support tube into a hole of the heat exchanger. Therein the UHP tube may be advanced to clean sediment from the heat exchanger tube.

A heat exchange system having desired anti-scaling performance and an anti-scaling method thereof are disclosed. The heat exchange system at least comprises a load control unit, a temperature and pressure detection unit and an anti-scaling treatment unit. The heat exchange system conditions bonding ways of water quality in a HVAC chiller unit, an air compressor, a heat exchanger, a cooling unit, or a boiler under a variety of scaling conditions in both field operation and water quality, by integrating the interaction of those units together with the anti-scaling method for simulating water quality that has a water quality limit same as that in field operation. The heat exchange system further integrates with a testing of anti-scaling performance to make water quality no longer charged and lose the reaction power so as to prevent scaling formation, enhance the anti-scaling performance, and ensure operating efficiency and performance.

The invention relates to a method for evaluation of fouling of passages of a spacer plate (10) of a tubular heat exchanger (11), wherein first, second and third pressure sensors (31, 32, 33) are arranged, the method comprising steps of: (a) during a transient operation phase of the heat exchanger determination of a value over time of Wide Range Level NGL, from the measurements of the first and third pressure sensors (31, 33), and of a value over time of Narrow Range Level NGE, from the measurements of the second and third pressure sensors (31, 33); (b) determination of a value over time of Steam Range Level deviation ΔNGV, corresponding to the NGL from which a component representative of a variation of free water surface in the heat exchanger has been filtered, from the values of NGL and NGE; (c) comparison of the determined value of ΔNGV with a set of reference profiles ΔNGV.sub.i for said transient operation phase of the heat exchanger, each reference profile ΔNGV.sub.i being associated with a level of fouling so as to identify a target reference profile ΔNGV.sub.opt among the reference profiles ΔNGV.sub.i for said transient operation phase of the heat exchanger, which is that closest to the determined value ΔNGV. (d) restored on an interface (3) of the level of fouling associated with the identified target reference profile ΔNGV.sub.opt.

A fuel gas heater includes a container; a gas inflow chamber defined in one end of the container and having a gas inlet; a gas outflow chamber defined in the one end and having a gas outlet; U-shaped heat transfer pipes disposed inside the container, the pipes each having one end communicating with the gas inflow chamber and another end communicating with the gas outflow chamber; a heating medium supply port; a heating medium discharge port; a gas inflow opening disposed to face positions at which the pipes communicate with the gas inflow chamber; a gas inflow lid that enables the gas inflow opening to be opened and closed; a gas outflow opening disposed to face positions at which the pipes communicate with the gas outflow chamber; and a gas outflow lid that enables the gas outflow opening to be opened and closed.

A grit blasting arrangement for cleaning chemical reactor tubes includes means for ensuring the grit blast nozzle is coaxial with the longitudinal axis of the tube to be cleaned.

A fuel gas heater includes a container; a gas inflow chamber defined in one end of the container and having a gas inlet; a gas outflow chamber defined in the one end and having a gas outlet; U-shaped heat transfer pipes disposed inside the container, the pipes each having one end communicating with the gas inflow chamber and another end communicating with the gas outflow chamber; a heating medium supply port; a heating medium discharge port; a gas inflow opening disposed to face positions at which the pipes communicate with the gas inflow chamber; a gas inflow lid that enables the gas inflow opening to be opened and closed; a gas outflow opening disposed to face positions at which the pipes communicate with the gas outflow chamber; and a gas outflow lid that enables the gas outflow opening to be opened and closed

A boiler system includes a boiler having at least one internal surface on which a deposit may form. The boiler system further includes at least one cleaning implement coupled to a high-pressure fluid supply for carrying a high-pressure fluid into the boiler. The cleaning implement is configured such that the high-pressure fluid impacts the surface. The boiler system also includes at least one pressure measuring device coupled to the high-pressure fluid system. The pressure measuring device is configured to measure at least one of the pressure or flow rate in a high-pressure fluid supply, and the measured pressure and/or flow rate indicates presence or absence of the deposit on the surface.

A boiler system includes a boiler having at least one internal surface on which a deposit may form. The boiler system further includes at least one cleaning implement coupled to a high-pressure fluid supply for carrying a high-pressure fluid into the boiler. The cleaning implement is configured such that the high-pressure fluid impacts the surface. The boiler system also includes at least one pressure measuring device coupled to the high-pressure fluid system. The pressure measuring device is configured to measure at least one of the pressure or flow rate in a high-pressure fluid supply, and the measured pressure and/or flow rate indicates presence or absence of the deposit on the surface.

Methods of online cleaning of heat exchangers at elevated temperatures are provided. Cleaning of the heat exchanger is achieved through an increasing heat exchanger effluent temperature of a polymer solution together with operating under optimized process conditions provided by a phase diagram constructed for the polymer solution. The separation of polymer from unreacted monomers and solvent in the polymer solution is carried out by raising the temperature of the polymer solution as reactor effluent flowing through the heat exchanger. Then, subsequently and by reducing pressure of the heat exchanger effluent, the polymer solution separates into two liquid phases.

A method is used for cleaning heat exchanger systems. The method is performed at a computer system having one or more processors and memory storing one or more programs configured for execution by the one or more processors. The method determines component percentages of a cleaning solution based, at least in part, on operational parameters of a heat exchanger system. The operational parameters include chemical composition of fluids passing through the heat exchanger system and operating temperatures of the fluids passing through the heat exchanger system. The component percentages of the cleaning solution include: (1) hydrogen peroxide, 2-90 wt. %; (2) a complexing agent, 3-30 wt. %; (3) water-soluble calixarene, 0.01-10 wt. %; and (4) water. The complexing agent includes a polybasic organic acid or a sodium salt thereof, or a derivative of phosphorous acid.