CS240091B1 - Manhole plate heat transfer surface - Google Patents

Abstract

The purpose of the invention is to simplify the design of cooling crystallizers while maintaining an even distribution of the candy flow through the plate heat exchange surface. These effects are achieved by placing a manhole necessary for assembly and repair in the plate heat exchange surface and covering it with a lid provided with one or more holes.

Description

The invention provides an embodiment of a manhole through a plate heat exchange surface used for heat transfer, particularly in the sugar industry.

In the sugar industry, in recent years, the use of vertical cooling crystallisers has been spreading, applying a heat exchange surface distributed in the crystallisers on individual floors above each other. For example, the formation of individual trays of the plate heat transfer surfaces is accomplished by using a cooling disk with apertures for the flow of confectionery through the disk. The disk fills the entire circular cross-section of the crystallizers, with the holes in the disk for the flow of the confectionery being so small that they do not allow access to the human factor, including the introduction of some components into the spaces between adjacent floors of the cooling disks. This approach is provided by the application of manholes in the cylindrical shell of the crystallizers for each space between adjacent levels of cooling disks separately. It is also known to provide a manhole opening in each cooling disk.

Both described embodiments of manholes have disadvantages.

In the first case, the implementation of standardized manholes in the housing of the apparatus, including the lid, access platforms, ladders, etc., leads to a complicated and laborious solution. In the latter case, the design of the aperture in the disc is simple, since the same manufacturing process is used as the apertures provided by the cooling disc for the flow of the confectionery. The disadvantage of this solution, however, is that the manhole opening is substantially larger than the confectionery flow opening. This leads to disruption of the flow cross-sectional distribution in the cooling disk and thus even distribution of the confectionery flow through this disk, which may be adversely affected in the process technology.

240

According to the invention, the hatch opening is provided with a removable lid, which lid may be provided with one or more openings of a size similar to that of the openings in the plate heat exchange surface of the present invention. passing the confectionery through a cooling disk. The advantage of using the hollow plate heat exchanger according to the invention lies in the low labor intensity, based on the indicated example of cooling disk application, based on a simple manufacturing process, using the technology of punching holes for the passage of sweets through the cooling disk. Covering the manhole cover with one or more openings of a size similar to that of the confectionery passage through the cooling disc ensures uniform distribution of the flow cross section in the cooling disc with all the beneficial consequences for the process of cooling the confectionery.

In the accompanying drawings, an exemplary embodiment of a manhole plate heat exchanger surface according to the invention is shown, wherein FIG. 2 is a cross-sectional view taken along line A-A of the manhole axis shown in plan view in FIG.

The plate heat exchanging surface 2 is formed by an upper plate 6 and a lower plate 6 with a crimped flange 6 '. The hatch formed by the opening 4 in the plate heat exchange surface is provided with brackets 4 welded to the crimped edge of the bottom plate 3. A manhole cover 7 with an opening 8 is detachably attached to the brackets.

The embodiment of the hatch plate heat exchanger according to the invention is intended for a device using hollow plate-shaped heat exchange elements. In the food industry these are mainly cooling crystallizers. Similar uses may occur in the chemical or pharmaceutical industry.

Claims (2)

SUBJECT OF THE INVENTION 240 091 A hatch with a plate heat exchange surface formed by an opening in the plate heat exchange surface, characterized in that the hatch opening (4) is provided with a lid (7) removably connected to the plate heat exchange surface (1). Manhole according to claim 1, characterized in that the manhole cover (7) is provided with at least one opening (8).