RU117266U1 - SMALL DRYING UNIT - Google Patents

Abstract

A small-sized drying plant containing a housing with a drying chamber installed inside with mesh trays located in tiers, infrared emitters under the drying chamber arch, a supply opening and a drying agent discharge opening, a bypass air duct, characterized in that it is equipped with an automation unit, which receives information from additional a sensor for measuring the temperature of the surface layer of raw materials and a weight control sensor installed in the drying chamber.

Description

The utility model relates to drying installations and can be used for drying fish raw materials.

Known drying cabinet containing a housing in which are installed on the guide pallets installed in tiers, IR emitters placed in cassettes and also placed in tiers, fans, temperature sensors (US Pat. RF No. 2043585, publ. 09/10/1995). The drying cabinet is designed for drying high-moisture materials (vegetables, fruits, fish, meat, etc.). Drying is carried out in a pulse heating-cooling mode. Dried products comply with GOST.

A known device for drying, comprising a housing with a drying chamber installed inside the mesh with mesh pallets arranged in tiers, a panel of infrared emitters under the roof of the drying chamber, a feed opening and an outlet for ejecting a drying agent, a bypass duct (AS USSR No. 1513352, publ. 31.12 .1986). The device is intended for drying high-moisture raw materials. The drying process is carried out simultaneously in convection mode and in radiation - infrared irradiation using infrared emitters, then the material is sent to the chamber for drying. The invention is aimed at accelerating the drying process. This device is closest to the claimed utility model and is taken as a prototype. Its disadvantage lies in the insufficiently high control of the drying process and the presence of a drying stage, which complicates the entire drying process.

The technical result, the achievement of which the claimed utility model is aimed, is to increase the accuracy of control and simplify the drying process.

To achieve the technical result, a small-sized drying installation, comprising a casing with a drying chamber inside with mesh pallets arranged in tiers, IR emitters under the drying chamber vault, a supply opening and a discharge hole for a drying agent, a bypass duct, is equipped with an automation unit that receives information from additionally installed in the drying chamber, a sensor for measuring the temperature of the surface layer of the raw material and a sensor for weight control.

The distinctive features of the proposed small-sized drying unit from the above-mentioned known drying apparatus closest to it are the presence of an automation unit, a sensor for measuring the surface temperature of the raw material layer and a weight control sensor. Information about the change in the surface temperature of the dried raw material and the change in the weight of the raw material from these sensors is sent to the automation unit. Based on the information received, the automation unit corrects the intensity of infrared radiation and the temperature of the drying agent (convection). This allows you to significantly increase the accuracy of the control of the drying process, and, in addition, also simplify the control of the drying process. The entire drying process takes place in one chamber, which greatly simplifies the process.

The proposed small-sized drying installation is illustrated by the drawings presented in figures 1, 2.

Figure 1 shows a longitudinal section of the installation, figure 2 is a front view with the door open.

The small-sized drying installation (FIGS. 1, 2) contains a housing 1, inside there is a drying chamber (shown in FIGS. 1, 2) with mesh pallets 12. Access to the inside of the drying chamber is through the loading and unloading door 13.

A double-sided centrifugal fan 3 pumps air into the chamber 2 for heating the air through the blower duct 5. The injected warm air enters directly into the drying chamber through the air supply pipe 9 and the air inlet 10 to the chamber. A part of the air passed through the drying chamber through the air discharge hole 11 from the chamber is discharged to the outside, and a part through the bypass duct 15 is returned to the air heating chamber 2 in order to increase its efficiency. The chamber 2 for heating the air is a heat-resistant pipe with a heater located inside it.

The small-sized drying unit is equipped with an automation unit 6, which receives signals from a thermocouple 8, an infrared sensor 7 for the temperature of the surface layer and from a sensor 14 for the weight of raw materials located under the mesh pallets 12. The automation unit 6, in accordance with the work program, controls the IR emitters 4 located under the arch of the drying chamber installed inside the housing 1 of a small-sized drying installation. The automation unit 6 also controls the intensity of the air heating in the air heating chamber 2.

Installation works as follows.

Raw materials intended for drying through the door 13 of the load-unloading is placed on the mesh pallets 12. An infrared sensor 7 of the temperature of the surface layer is positioned above the raw material.

In the automation unit 6 set the desired mode of operation, drying temperature, the final weight of the raw material. After entering the required parameters, a small-sized dryer is launched.

The launch of a small-sized drying installation is accompanied by the start of the air heating chamber 2, IR emitters 4, as well as a double-sided centrifugal fan 3.

A double-sided centrifugal fan 3 pumps air into the chamber 2 for heating the air through the blower duct 5. The injected warm air enters the small-sized dryer through the pipe 9 of the air supply and the inlet 10 of the air supply to the chamber.

This forms the convective component of the drying process, when heat is transferred through the channels from the coolant to the surface of the dried raw material.

In order to increase the efficiency of operation of the air heating chamber 2, a part of the air passed through the small-sized drying installation through the bypass duct 15 is returned to it for further heating.

In the drying process, the raw material is subjected to infrared radiation coming from IR emitters 4. The intensity of the IR emitters 4 is regulated by the automation unit 6. This forms the radiation component of the drying process.

The signals from the thermocouple 8, the infrared temperature sensor 7 of the surface layer and the sensor 14 of the weight of the raw material are output to the automation unit 6. The automation unit 6 operates according to the signals from the sensors and according to the initial parameters entered. A distinctive feature of automation unit 6 is the ability to inform users of a small-sized drying plant about the modes and controlled parameters of the drying process through the global Internet and mobile communications.

Information on changes in the weight of raw materials (and calculated information on changes in moisture content) over the course of the drying process and the temperature of the surface of the raw materials to be dried are sent online to the process operator of the small-sized drying plant via telecommunication channels (global Internet and mobile communications.).

Claims (1)

A small-sized drying installation, comprising a casing with a drying chamber installed inside, with mesh pallets arranged in tiers, IR emitters under the drying chamber vault, a supply opening and a discharge outlet for a drying agent, a bypass duct, characterized in that it is equipped with an automation unit, which receives information from installed in the drying chamber of a sensor for measuring the temperature of the surface layer of raw materials and a weight control sensor.