RU178989U1 - CAMERA DRYER FOR CERAMIC PRODUCTS - Google Patents

Abstract

The utility model relates to the building materials industry and can be used for drying shaped ceramic products of various shapes and configurations before the subsequent firing stage. A chamber dryer for ceramic products contains a housing 1, devices 4 and 5 for supplying and removing coolant. The latter is made in the form of a pipe communicating with the interior of the housing 1. The housing 1 is located vertically and has a cylindrical shape. The feed device 4 is made in the form of nozzles mounted externally on the housing with the same pitch opposite each of the shelves and in the same plane with them. The removal device 5 is fixed coaxially in the upper part of the housing 1. To achieve maximum energy efficiency of the distribution of the coolant through the dryer body, the nozzles of the feeding device 4 can be located at an angle of 40-50 ° to the tangent of housing 1. The utility model should improve the quality of heat treatment of products by creating a uniform temperature field in the dryer chamber. 2 ill.

Description

The utility model relates to the building materials industry and can be used for drying shaped ceramic products of various shapes and configurations before the subsequent firing stage.

Known convective chamber dryer [Patent RU on the invention No. 2215251 Cl. F26B 9/06, published October 27, 2003, bull. No. 30], containing a drying chamber, a coolant recirculation unit, axial fans and a false ceiling switchgear in the zone of supply of the drying agent, which directs 1/3 of the volume of the drying agent in the region of the area of the top stack stack.

A disadvantage of the known solution is the unevenness of the heat treatment of products along the length of the chamber.

Known chamber dryer [Patent RU on the invention No. 2305236 Cl. F26B 9/06, published August 27, 2007, bull. No. 24], containing a drying chamber, on the frame of which between the trolleys there are visors that divide the chamber space into three zones located one above the other, along which the drying agent sequentially moves. Fresh air heated in an external air heater is sucked in by a fan and fed to the bottom of the dryer chamber. Here it moves, changing direction twice and heating twice in intermediate heaters. Part of the exhaust air with a gate is sent to mix with fresh air in the mixing chamber.

The disadvantage of this dryer is the unevenness of the temperature field due to the presence of several heat sources, as a result of which the products located in opposite edges of the trolley will have different drying speeds, which will lead to the formation of uneven shrink stresses, which can lead to cracking, reduce their quality and increase reject rate.

The closest analogue adopted for the prototype is a dryer for ceramic products [RU patent for utility model No. 72751 Cl. F26B 9/06, published 04/27/2008, bull. No. 12], containing enclosing walls (case) and partition walls, discharge manifolds, heat generators, discharge fans, pipelines and collectors (coolant supply device). At the joints of the enclosing walls there are horizontal hollow channels (coolant removal device) communicated with the interior of the chamber and intersecting with the vertical channels communicated with the suction pipelines which are in communication with the suction fans.

With the existing features of the utility model, the following set of features of the prototype coincides: the casing, the supply and removal of the coolant in communication with the interior of the casing.

The disadvantage of the prototype is the low quality of heat treatment of products caused by the formation of stagnant zones in the lower part and in the corners of the chamber due to the uneven distribution of the coolant.

The objective of the utility model is to improve the quality of heat treatment of products by creating a uniform temperature field in the dryer chamber.

This is achieved by the fact that the chamber dryer for ceramic products contains a housing, devices for supplying and removing coolant in communication with the interior of the housing. In the proposed solution, the housing is located vertically and has a cylindrical shape. The feed device is made in the form of nozzles mounted externally on the housing with the same pitch opposite each of the shelves and in the same plane with them. The removal device is fixed coaxially in the upper part of the housing.

To achieve maximum energy efficiency of the distribution of the coolant through the dryer body, the nozzles of the feed device can be located at an angle of 40-50 ° to the tangent of the case.

The essence of the utility model is illustrated by graphic materials, where in FIG. 1 shows a diagram of a chamber dryer, FIG. 2 is a section AA in FIG. one.

The chamber dryer (Fig. 1) contains a housing 1, which is located vertically and has a cylindrical shape, inside which a package of cylindrical shelves 2 with products 3, for example shaped ceramic parts, is installed. The supply device 4 of the coolant, made in the form of nozzles. The nozzles are fixed, for example by welding, on the outside of the housing with the same pitch opposite each of the shelves and in the same plane with them. Coaxial with the housing in its upper part, a heat transfer device 5 is installed, communicating with the interior of the housing, made, for example, in the form of a pipe.

To achieve maximum energy efficiency of the distribution of coolant through the dryer body, the nozzles of the feed device can be located at an angle of 40-50 ° to the tangent of the case (Fig. 2).

Chamber dryer operates as follows. The coolant, for example air, is directed through the nozzles of the supply device 4 into the inner space of the vertical cylindrical body 1, uniformly distributed between the cylindrical shelves 2, washing the products 3, and then exits through the coolant removal device 5.

The cylindrical shape of the case allows you to get rid of the lack of prototype in the form of the formation of stagnant zones at the corners of the chamber. The vertical arrangement of the case and the coaxial arrangement of the removal device in its upper part allows the coolant to be removed in time, without leading to the formation of temperature unevenness in the upper zone.

In the internal space of the housing, the movement of the coolant from the periphery to the center is organized, due to the fixing of the nozzles from the outside. To create a uniform coolant supply, the nozzles of the supply device are mounted on the housing with the same pitch. Their location in the same plane with the shelves of the case, and at an angle of 40-50 ° to the tangent drawn to its surface, allows to improve the movement of the coolant over the entire cross-sectional area without the formation of stagnant zones, which contributes to the creation of a uniform temperature field. Due to this, conditions are created for products to pass the same temperature regime regardless of their height on the package of cylindrical shelves, the quality of heat treatment is improved, and losses from rejects are reduced.

The utility model will improve the movement of the working medium in the chamber dryer space, create a uniform temperature field, intensify the heating process, improve the quality of heat treatment of products, and also reduce the percentage of rejects.

Claims (2)

1. Chamber dryer for ceramic products, comprising a housing, a supply and removal device for a coolant in communication with the interior of the housing, characterized in that the housing is vertically and cylindrical, the feeding device is made in the form of nozzles mounted externally on the housing with the same pitch opposite each of the shelves and in the same plane with them, and the removal device is fixed coaxially in the upper part of the housing. 2. A chamber dryer according to claim 1, characterized in that the nozzles of the feeding device are located at an angle of 40-50 ° to the tangent of the housing.

Images