Abstract A boiler of the type having a convection enclosure with convection surfaces in which the convection enclosure is partially enclosed by walls which form a downwardly closed water-tight container. These walls extend downwardly to at least the upper portion of the convection enclosure. Inlet and outlet piping and valves are provided for the water-tight container to permit the container to be filled with water for dissolving soot and other deposits on the convection surfaces in order to clear the surfaces and to remove the contaminated water from the water-tight container. The inlet piping is equpped with nozzles located above the convection enclosure to distribute the rinsing water on the convection surfaces. Chemicals may be mixed with the rinsing water for the purpose of neutralizing the contaminated water prior to removal. An electrode supplied by a source of direct current voltage is located inside the water-tight container with the direct current source also connected to the boiler wall and convention enclosure. A switch device is provided to reverse the polarity of the electrode and the boiler wall and convection enclosure.
A boiler of the type having convection surfaces located adjacent to and in communication with a combustion chamber, a floor and upstanding walls forming a water-tight container for the convection surfaces with said walls extending sufficiently high to permit water to cover the convection surfaces while permitting communication with the combustion chamber, means for filling the water-tight container with water for dissolving soot and other deposits on the convection surfaces to clean said surfaces, and means for removing the contaminated water from the water-tight container.
Claim 2
Dependent Claim
85 words
A boiler of the type having convection surfaces located adjacent to and in communication with a combustion chamber, a floor and upstanding walls forming a water-tight container for the convection surfaces with said walls extending sufficiently high to permit water to cover the convection surfaces while permitting communication with the combustion chamber, means for filling the water-tight container with water for dissolving soot and other deposits on the convection surfaces to clean said surfaces, and means for removing the contaminated water from the water-tight container.
Claim 3
Dependent Claim
32 words
The boiler of claim 1 in which said filling means include means to mix chemicals with the water supplied to the water-tight container for neutralizing the contaminated water prior to removing it.
Claim 4
Dependent Claim
37 words
The boiler of claim 1 in which said filling means includes nozzles arranged above the convection surfaces and connected to a water supply by a closing valve controlled by a level sensing device in the water-tight container.
Claim 5
Dependent Claim
46 words
The boiler of claim 1 in which an electrode is located in contact with the liquid in the water-tight container and a source of direct current voltage is connected between said electrode and a wall of the water-tight container which is in contact with the liquid.
Claim 6
Dependent Claim
22 words
The boiler of claim 4 in which the electrode is connected to the positive terminal of the source of direct current voltage.
Claim 7
Dependent Claim
35 words
The boiler of claim 4 in which the direct current voltage source is connected to the electrode and the wall of the water-tight container by means of a switch device to enable selective terminal connection.
Claim 8
Dependent Claim
19 words
A boiler of claim 4 in which the electrode is arranged in the lower part of the water-tight container.