TH4653U - Heat exchange furnaces and the manufacturing process of such furnaces. - Google Patents

Abstract

The heat exchanger furnace consists of a combustion module (1), a passage module (2) arranged around and detached to the combustion module (1), and a gas guiding unit (3), which includes upper and lower guide modules (32, 31) detached to the upper and lower ends of the passage module (2), respectively. During assembly, the lower guide module (31) is first detached to the passage module (2). Then, the passage module (2) is detached and placed over the combustion module (1). Finally, the upper guide module (32) is detached and placed over the passage module (2) (Figure 2).

Claims (9)

1. A heat exchanger furnace comprising a combustion module adapted for burning fuel, with combustion gases generated within it, is characterized by a passage module consisting of annular plates arranged around the furnace module to define the boundaries of the annular heat exchange space between them. The uppermost annular plate is removable and has an outer side fixed to the upper end of the annular plate to seal the upper end of the heat exchange space. The lowermost annular plate is removable and has an outer side fixed to the lower end of the annular plate to seal the lower end of the heat exchange space. At least one guide unit consisting of multiple guide tubes arranged within the heat exchange space and around the combustion module, with their upper ends sealed through the upper annular plate and their lower ends sealed through the lower annular plate. Finally, a gas guide unit consisting of an upper guide module arranged on and above the upper annular plate, which is removable. It is constructed with a gas outlet unit to allow the exhaust gases of combustion from the heat exchanger furnace to pass through that section, and a removable lower guide module positioned above and below the lowest annular plate. This, in conjunction with the upper guide module, restricts the flow of combustion gases through each set of guide tubes. Together, these guide tubes, including the upper and lower guide modules, form a meandering gas flow path for the combustion gases. The gas guide unit directs the combustion gases from the combustion furnace module to the gas outlet unit via this meandering flow path. 2. A heat-exchanging furnace as described in Representation 1, whereby such combustion furnace module shall include a furnace wall that encloses the combustion chamber and has an open lower end, whereby such furnace wall shall be constructed with multiple vents which are angled relative to the radial direction of such furnace wall to allow air to flow into the combustion chamber through this section and recirculate within the combustion chamber; a bottom wall which is fixed to the lower end of such furnace wall in a manner that seals the open lower end of such furnace wall; a fire barrier layer placed on the inner surface of such furnace wall and the bottom wall; and multiple air ducts that pass through the heat-exchanging space and make contact with the enclosing section and the vents, respectively. 3. A heat-exchanging furnace as described in Requirement 2, whereby the furnace walls and surrounding plates shall be constructed respectively, with openings and fuel inlets aligned and adjusted so that fuel is fed into the combustion chamber through these sections. 4. A heat exchanger furnace as described in Claim 1, whereby the gas-guiding unit includes several heat-resistant upper sealing rings placed between such upper guiding module and such upper annular plate to create an impermeable seal between them, and several heat-resistant lower sealing rings placed between such lower guiding module and such lower annular plate to create an impermeable seal between them. 5. The heat exchanger furnace as described in Requisition 1, which also includes a thermal insulation device including an outer ring layer arranged around and fixed to the said passage module assembly and the said gas guide unit, and a ring-shaped thermal insulation layer clamped between the said outer layer and the said passage module assembly and the said gas guide unit. 6. The heat exchanger furnace as described in Requisition 1, where the upper guide module shall include a surrounding wall, the uppermost wall fixed to the upper end of such surrounding wall of the upper guide module and acting in conjunction with such surrounding wall of the upper guide module to define the upper guide space boundary between it, where the gas outlet unit is constructed through such uppermost wall, and several partitions to divide the upper guide space into a gas inlet chamber connected to the combustion chamber in the combustion chamber module and one such guiding pipe set, a gas outlet chamber connected to the gas outlet unit in such uppermost wall and another such guiding pipe set, and several upper gas transfer chambers each connected to one of two adjacent such guiding pipe sets, and the lower guide module shall include two surrounding walls, one such surrounding wall of the lower guide module surrounded by another such surrounding wall of the lower guide module, and a ring-shaped lower wall fixed to the lower end of such surrounding wall of the lower guide module. And it acts with the surrounding walls of the said lower navigation module to define the boundaries of the lower navigation space in between, and multiple dividers to separate the said lower navigation space into at least two lower gas transfer chambers, each connected to one of the two adjacent sets of such guide pipes. 7. The heat exchanger furnace as described in claim 6, whereby the gas guiding unit includes the fire-resistant layer placed on the surface of the top wall, the top annular plate and the separating section which together define the boundaries of the gas inlet chamber. 8. A heat exchanger furnace as described in claim 7, whereby the gas-guided unit includes a thermal insulation layer clamped between the top annular plate and the fire barrier layer. 9. The process of constructing one of the heat exchanger furnaces under any of the claims 1-8, which is characterized by the following steps: (1) the attachment of the lower guide module to the lower end of the passage module, which is removable; (2) the attachment of the said passage module and the said lower guide module to the combustion chamber module, which is removable, in such a manner that the said passage module and the said lower guide module are arranged around the said combustion chamber module; and (3) the attachment of the upper guide module to the upper end of the said passage module, which is removable.