MXPA97008622A

MXPA97008622A - Brick for ac changers

Info

Publication number: MXPA97008622A
Application number: MXPA/A/1997/008622A
Authority: MX
Inventors: V Tatar Doru
Original assignee: Sc Metal Sa Galati
Priority date: 1995-05-09
Filing date: 1997-11-07
Publication date: 1998-02-01

Abstract

The present invention relates to a hexagonal refractory brick, characterized in that it comprises: a generally hexagonal top surface, a generally hexagonal top surface, a generally hexagonal bottom surface, said bottom surface having a smaller area than said top surface, and uninterrupted flat side surfaces continuously tapering from said upper surface to said lower surface, said upper surface having raised radial members that divide said upper surface into areas, of a third of said upper surface, said refractory brick further defining a plurality of vertical internal channels and a plurality of channels partial verticals, said partial vertical channels being located to join to form complete vertical channels when said brick is juxtaposed with other brick

Description

BRICK FOR HEAT CHANGERS TECHNICAL FIELD This invention relates to a new type of brick for lining heat exchangers. It is particularly useful in blast furnace homes.

BACKGROUND OF THE INVENTION The hexagonal brick model for heat exchanger is well known, with its longitudinal interior hexagonal or circular channels and with a side profile selected so that when the bricks are placed one next to the other, they form other similar longitudinal channels, modifying the lower part of the brick in the form of a step to reduce the outer dimensions, the outer vertical channels can be made to communicate hollowly. Said brick having a "step" in the lower part thereof is described in Romanian Patent 107441B. These bricks of the prior art have the following disadvantages: as a result of the presence of the step to reduce the horizontal cross section in the lower part of the brick contour, the vertical side faces of the brick are complicated and, therefore, cause problems additional during molding, handling during manufacturing and shipping from the point of view of uniformity and integrity of the additional edges created; Due to the position and dimensions of said lateral step, the surface contact of the peripheral vertical faces of the brick with the thermal agent is limited to a small percentage of its size.

BRIEF DESCRIPTION OF THE INVENTION The new brick described by the invention eliminates the aforementioned disadvantages because, to simplify the molding, to eliminate the non-uniform pressure and the subsequent deterioration of the edges, as well as to increase the contact surface between the side face of the brick and the agent thermal, has a different type of vertical side profile that is straight and is oriented to obtain a more pronounced taper of the lateral faces, decreasing from the upper face - towards the underside of the brick, so that the lateral contour consists of straight lines not interrupted by a step, and when two bricks are placed one next to the other, a triangular space is formed between them over their entire height.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a top view of the novel brick. Figure 2 is a sectional view of the novel brick. Figure 3 shows an assembly of the bricks, demonstrating how horizontal passages are formed in particular.

DETAILED DESCRIPTION OF THE INVENTION First in relation to Figure 1, this top view of the generally hexagonal brick shows refractory material 1 having outer edges 4 and defining seven internal vertical channels 2, six half openings 3 in channels and six thirds of opening 7 in corner. The view also shows three radial raised portions? (at 120 °) that divide the upper part of the brick into thirds, extending from the center to three corners of the brick. Figure 2 is a central section of the brick showing refractory material 1, internal vertical channels 2 and outer edges 4. The outer edges 4 are internally tapered from the upper part 5 of the brick to the lower part 6. Elevated portions 8 are also observed in the top 5 Figure 3 shows how the bricks are assembled. It will be noted that the raised portions 8 of three bricks placed together will form a hexagonal area in which the lower part 6 of a fourth brick is adapted, forming a triangular space 9 therebetween which communicates horizontally around the circumference of the brick. Each brick can have on it portions of three other bricks and, in turn, it is placed on portions of three bricks below it. The half openings 3 in channels, being centrally located on the hexagonal sides of the brick, are joined to form mixed vertical channels 10, each of which communicates with other mixed vertical channels 10 above and below formed by the overlapping bricks. Three of the thirds of opening 7 in corner of three different bricks meet to form a tertiary opening 11 in the union of three bricks; these tertiary openings 11 communicate with other tertiary openings 11 above and below, and also with the central internal vertical channels 2 - that is, the vertical channels 2 which are located in the centers of the bricks will communicate with tertiary openings 11 above and below. In all cases, the triangular spaces 9 communicate around the periphery of the brick, allowing the flow of gases both horizontally and vertically towards the different openings on the lower and upper surfaces. The configuration of Figure 3 can be known, and will be referred to in the claims, as three on one, or one over three, stacked. The brick described by the invention consists of a refractory material 1, vertical vertical channels 2, vertical sectional vertical channels 3, and outer edges 4 that deviate from the vertical and are formed by connecting the peripheral sides of the upper face 5 with the peripheral sides Reduced from the lower face 6. It will thus be appreciated that the internal vertical channels 2 are conveniently separated uniformly, six of them being approximately intermediate between the center of the brick and the corners, separated at 60 ° intervals, and the seventh being centrally located. Also, the half openings 3 in channels are conveniently located at the center of each side of the hexagonal configuration. When placed together as in Figure 3, with or without cement, the bricks can be used as heat exchangers and as liners for the furnaces and for other similar refractory uses. The brick for heat exchangers has the following advantages: it provides an increased exchange surface causing the entire side surface of the brick to come into contact with the gases, which improves the technical performance of the heat exchanger; has the same technical characteristics as the prior art model, both from the point of view of the weight and the type of refractory material, as of the porosity of the heat exchanger obtained and, therefore, can replace the solution of the prior art without modifying any of the magnitude of operation of the heat exchanger.

Claims

NOVELTY OF THE INVENTION CLAIMS

1. - The hexagonal brick for heat exchangers having vertical interior (2) and exterior (3, 7) channels, and having projections (8) on its upper face (5) to rest in the plane of the lower face (6) of an identical overlying brick, characterized in that the area of the upper face (5) is greater than the area of the opposite flat lower face (6), so that the flat bottom face (6) fits between the projections (8). ) on the upper face (5) of the underlying brick.

2. The structure of the heat exchanger comprising bricks according to claim 1, characterized in that each overlying brick rests with its flat bottom face (6) on a third of the top face (5) of each of three bricks underlying.