Abstract: The invention is related to a so-called on-line method and a device for the cleaning of contamination with dirt, resp., caking or slag deposits in vessels and combustion installations by means of blasting technology. For this purpose, an explosive gas mixture is made to detonate in the proximity of the contamination with dirt, resp., caking or slag deposits.

Abstract: The present invention relates to a method and apparatus for cleaning and removing the buildup of products of corrosion, oxidation, sedimentation and comparable chemical reactions from various portions of a fire tube boiler. Specific areas to be cleaned are the surfaces of the fire tubes, crevices, and junctions inside the boiler. Also cleaned is the location where the fire tube boiler comes into contact with the tube sheets, boiler shell and fire tubes. One or a plurality of ultrasonic transducers are placed inside the boiler and activated to transmit ultrasonic energy at a sufficient amplitude and frequency to dislodge deposits, sedimentation and sludge from the interior surfaces of the boiler.

Abstract: An apparatus and method of operating a steam generator tube bank are disclosed in which a water drum of a typical steam drum/water drum combination is replaced with a plurality of smaller readers to permit the use of rapping, or mechanical rappers, to clean the tubes extending between the steam drum and the headers. The steam generator tube bank of the present invention comprises a steam drum or collecting header, a plurality of headers extending below the steam drum, and a plurality of tubes extending between the steam drum and the headers and placing the steam drum and headers in fluid flow communication. The headers are sized to permit debris or deposits which accumulate on the tubes to be removed by rapping the headers, thereby inducing vibration of the headers and the tubes. The tubes are arranged in rows, and the headers are arranged to form rows of axially-aligned pairs of headers.

Abstract: A furnace having a fire box at one end of a multi-unit cell boiler receives combustible refuse and delivers hot combustion gases through passages between water cells of the multi-unit cell boiler. The combustion gases enter an exhaust stack at the far end of the boiler after giving up most of their contained heat to the water circulating through the cells. Simultaneously, water flows through the base of the boiler on a circuitous path from its end adjacent to the exhaust stack toward the furnace and through cooling walls of the furnace and then through a holding tank to a pump which delivers the water to a header communicating with the cells of the boiler unit most distant from the furnace. The water being pumped into the cells is preheated to boost the thermal efficiency of the boiler. Steam generated in the boiler enters a steam header connected with the cell boiler unit nearest the furnace.