RU2293264C1 - Device for drying high-humid materials - Google Patents

Abstract

FIELD: drying.

SUBSTANCE: device comprises drying chamber with pad for material to be dried and infrared emitter. The drying chamber is made of pad and lid. The pad with material to be dried and infrared emitter are mounted on the frame from opposite sides of the lid made of a transparent material and secured to the frame. The pad and emitter can move with respect to the lid. The pad of the drying chamber is provided with the heat exchanger. The pad can be mounted for permitting rotation with respect to the lid and connection with the evacuating line and line for supplying neutral gas. The heat exchanger is provided with shaping plates, and it is connected with the circulating pump. The refrigerator is mounted between the heat exchanger and inlet to the pump. The heater is mounted between the outlet from the pump and heat exchanger.

EFFECT: enhanced efficiency.

4 cl, 6 dwg

Description

The invention relates to a device for drying high-moisture materials, in particular peroxide compounds of alkali and alkaline earth metals.

A device for drying high-moisture materials according to ed. USSR N 1513352, IPC F 26 B 3/30, 1989. The device includes a drying chamber in which a tray for the material to be dried is installed, infrared emitters are placed in the upper and lower panels of the chamber. The chamber is equipped with a device for supplying a drying agent and a device for mixing it. Drying of the product in such a device is carried out in two stages with the regulation of the radiation intensity.

A disadvantage of the known device is the inability to stabilize the temperature in the drying volume due to the inability to supply heat to the material to be dried from the side of the pallet.

Closest to the invention is a device for drying high-moisture materials, including a drying chamber, in which a mesh tray with a dried material is installed, an infrared emitter located on the upper wall of the chamber, a drying agent supply system. The side walls of the drying chamber, as well as the baking tray-reflector installed under the pallet, have a mirror-reflective surface. In the drying chamber, a temperature sensor is mounted above the pallet with the material, connected to the automatic control unit, and the automatic control unit is connected to the critical heating temperature setpoint. Drying of the material in such a device is carried out by irradiation with direct and reflected infrared rays, while the drying process is regulated by adjusting the temperature mode by switching infrared emitters accordingly and changing the distance between the tray and infrared emitters. The switching of infrared emitters is carried out when the temperature critical for a particular material is reached. Such a constructive implementation of the device allows to reduce the energy intensity of the drying process through the use of reflection of infrared rays (RF patent No. 2163992, IPC 7 F 26 V 3/30, 3/28, 2001).

However, the known device does not allow to create a uniform temperature field in the mass of the dried material, since the movement of infrared emitters occurs only in the vertical plane and from a common drive. In addition, when drying highly moist and thermally unstable chemical products, such as peroxide compounds of alkali and alkaline earth metals, the known device cannot provide the necessary moisture removal rate due to imperfection of heating systems and removal of released water vapor.

The objective of the invention is to increase the efficiency of the drying process.

The technical result of the invention is to increase the productivity of a device for drying high-moisture materials.

The technical result is achieved by the fact that the device for drying high-moisture materials, including a drying chamber with a tray with dried material, an infrared emitter; the drying chamber is made in the form of a tray and a lid, a tray with a material to be dried and an infrared emitter are mounted on the frame on different sides of the optically transparent material fixed to the cover frame and can be moved relative to it, and a heat exchanger is installed in the drying chamber pan.

The pallet is mounted rotatably with respect to the lid and is connected to a vacuum line and a neutral gas supply line.

Profiling plates are installed on the heat exchanger and it is connected to the circulation pump.

A refrigerator is installed between the heat exchanger and the pump inlet, and a heater is installed between the pump outlet and the heat exchanger.

The design of the drying chamber in the form of a pallet and a lid and the installation of a pallet with a dried material and an infrared emitter on the frame on different sides of an optically transparent material fixed to the lid frame with the possibility of moving relative to it and installation of a heat exchanger connected to the circulation pump in the drying chamber, and the installation of profiling plates on the heat exchanger provides the ability to control the heating intensity and create a uniform temperature field in the drying zone product due to the movement of the infrared emitter on the vertical and horizontal racks of the frame. The implementation of the drying chamber with a cover of optically transparent material with an infrared emitter placed above it provides the ability to visually control the uniformity of heating of the product over the entire surface. This provides an increase in the productivity of the drying process, since the lag of drying of less heated sections of the product is eliminated.

The installation of the pallet with the possibility of rotation relative to the lid provides easy loading of the product and increases the safety of work. During the thermal decomposition of the product, the vacuum in the cavity of the drying chamber decreases, which automatically leads to its opening, thereby preventing its destruction. The connection of the pallet with the evacuation line and the neutral gas supply line provides the intensification of drying under vacuum in a stream of neutral gas.

The installation of a heat exchanger connected to the circulation pump in the drier of the drying chamber and the installation of profiling plates on the heat exchanger ensures the creation of a uniform temperature field over the thickness of the material due to additional heating or cooling of the profiling plates with the material to be dried during the drying process.

The installation between the heat exchanger and the inlet to the pump of the refrigerator provides preliminary cooling of the product, which eliminates its thermal decomposition. The installation between the outlet of the pump and the heater heat exchanger provides an intensification of the drying process of high-moisture materials, since the product is heated by an infrared emitter from above and the heat exchanger is heated from below. Thus, increasing the productivity of the installation for drying high-moisture materials.

Figure 1 presents a schematic diagram of the installation; figure 2 shows a General view of the installation in working condition in the context; figure 3 is the same at the time of loading and unloading the product; figure 4 shows a top view of the pallet (view A) with the cover removed; figure 5 shows a section along BB of figure 4; 6 shows a profiling plate; Fig.7 is the same, a cross-section along BB; on Fig shows the configuration of the dried material on the profiling plate during the drying process.

The device for drying high-moisture materials consists of a chamber 1 with a vacuum and vapor removal system consisting of a vacuum pump 2 connected to the fittings 3 and a transparent cover 4, which prevents the environment from entering the chamber. A heat exchanger 5 is mounted inside the chamber, into which the heat carrier is circulated by the pump 6, heating it at the pump outlet by the heater 7 and cooling it in front of it with the help of the refrigerator 8. The heat carrier supply line is equipped with a temperature meter and temperature controller 9, which can be used as a thermocouple connected to potentiometer. The chamber 1 is ventilated by a neutral gas, which is air dried and cleaned of carbon dioxide in the adsorber 10. Air enters the adsorber 10 through the valve 11 and rotameter 12, from the adsorber 10, in turn, passing the throttle 13, the neutral gas enters through the fitting 14 into the chamber 1. On the heat exchanger 5 are installed profiling plates 15 with the material to be dried 16. The profiling plates 15 are made of material that does not interact with the material to be dried, for example, F-4 fluoroplastic, and equipped with protrusions and depressions s Forming material to be dried in the drying process.

The camera 1 is mounted on a frame containing a base 17, vertical racks 18, on which horizontal racks 19 are mounted with the possibility of movement by means of bushings 20. In this case, the pallet 21 is mounted for rotation relative to the horizontal racks 19 and connected to the cover of transparent material 4 by means of a seal 22 . On the horizontal racks 19 is also installed infrared emitter 23 in the form of four incandescent lamps and a reflector 24.

The device operates as follows.

The product 16 is placed on the profiling plates 15, which are placed in the chamber 1, which is in the open position (as shown in FIG. 4), on the heat exchanger 5. The chamber is sealed by turning the pan 21 around the horizontal rack 19 in position until the seal 22 comes into contact with the transparent cover 4. In the chamber 1, through the fittings 3, a vacuum is created by the vacuum pump 2 and heat is supplied by switching on the infrared emitter 23 and feeding the heat transfer agent heated in the heater 7 to the heat exchanger 5 by the circulation pump 6 the roar is controlled by the movement of the infrared emitter 23 and the reflector 24 relative to the vertical posts 18 with the help of the sleeves 20. The temperature of the coolant at the inlet to the chamber 1 is controlled using a thermocouple 9. During the drying process, a dosed supply of neutral gas through the nozzle 14, throttle 13, valve 11, rotameter 12 and the adsorber 10 into the chamber 1 purified from water vapor and carbon dioxide. Heat is supplied from the infrared emitter 23 through a transparent cover 4. Before unloading the product, heating ceases and the coolant cooled in the refrigerator 8 is supplied to the heat exchanger 5 by the circulation pump 6 and the vacuum pump 2 is turned off, the pan 21 is rotated to the stop to the base 17 and removed product.

The proposed device can improve the performance of the device for drying high-moisture materials.

Claims (4)

1. A device for drying high-moisture materials, including a drying chamber and an infrared emitter, characterized in that the drying chamber is made in the form of a tray and a lid, a tray with a dried material and an infrared emitter are mounted on the frame on opposite sides of an optically transparent lid fixed on the cover frame with the possibility of movement relative to it, and a heat exchanger is installed in the pallet of the drying chamber. 2. The device for drying high-moisture materials according to claim 1, characterized in that the pallet is mounted rotatably relative to the lid and connected to a vacuum line and a neutral gas supply line. 3. The device for drying high-moisture materials according to claim 1, characterized in that the profiling plates are installed on the heat exchanger and it is connected to the circulation pump. 4. The device for drying high-moisture materials according to claim 1, characterized in that a refrigerator is installed between the heat exchanger and the pump inlet, and a heater is installed between the pump outlet and the heat exchanger.

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