RU50644U1 - DRUM DRYER FOR BULK THERMAL SENSITIVE MATERIALS - Google Patents

Abstract

The utility model relates to the field of drying granular and granular materials and can be used in the chemical, food and medical industries, and in particular for drying flower pollen (pollen). A drum dryer for bulk thermosensitive materials, comprising a rotating casing with a built-in nozzle with radial partitions located in the drying space, in communication with the coolant supply system, loading and unloading devices, mounted on opposite ends of the casing. The difference is that the nozzle is made in the form of four mesh radial partitions connected in the center of the housing by one common rib and located at an angle of 90 ° each subsequent relative to the previous one. The use of such a nozzle makes it possible to reduce the size of the outer diameter, to ensure uniform distribution of the material throughout the entire volume of the drum, and creates sparing conditions for the heating of the transported (poured) material along the sectors.

Description

The inventive utility model relates to the field of drying granular and granular materials and can be used in chemical, food and medical industries, and in particular for drying flower pollen (edger).

Known tray dryer for drying flower pollen type SP-2, which contains a metal casing with a mesh front door, air flow distributor and fan heater. Mesh pallets for the material to be dried are placed on top of each other inside the metal case ["Technology for the production and processing of beekeeping products", G. Tunikov and others - M .: Kolos, 2001, p.129].

The disadvantage of this dryer is that the pollen layer does not warm up evenly and with prolonged drying, without tedding, a crust forms on it. The drying process in such a dryer is very laborious.

The closest in design features to the claimed solution and selected for the prototype is a drum dryer for bulk thermosensitive materials, containing a rotating casing with a loading and unloading device located on its opposite end sections, the inner cavity of which is connected to the coolant supply system and forms a drying space in which mounted central perforated pipe, radial partitions attached to the inner surface of the drum and the outer surface of the pipe [see. USSR copyright certificate for invention No. 614301, class F 26 B 11/04, published 05/07/78, bull. No. 25].

The drawback of the dryer is the large weight of the rotating casing, which increases the energy costs of its rotation. Solid radial partitions poorly contribute to spillage

material, since the material, to a greater extent, slides over them. A dryer with such a complex design has high operating costs and high cost.

The inventors were faced with the task of creating a highly efficient, mobile, economical and reliable dryer for small apiaries, which will provide high-quality drying of flower pollen with uneven initial humidity and will optimize the actual drying process to the calculation drying process while maintaining all the properties of dried pollen, and reduce operating costs.

The technical result is to provide better drying of pollen with uneven initial humidity, while maintaining all the properties of dried pollen at low operating costs.

The problem is achieved in that in the proposed drum dryer for bulk thermosensitive materials, containing a rotating housing with a built-in nozzle with radial partitions located in the drying space, in communication with the coolant supply system, loading and unloading devices mounted on opposite ends of the housing, the nozzle is made in the form of four mesh radial partitions connected in the center of the housing by one common rib and located at an angle of 90 ° each next relative to the previous one.

Radial partitions connected by a long rib in the center of the drum allow you to place the material closer to the center of the drying drum, where the main flow of the coolant flows, which provides a more complete transfer of heat and more intensive moisture removal from the dried material.

Radial partitions are made in the form of a metal mesh with a hole size of 2.5 mm. This design of radial partitions

will increase direct contact of the coolant with the dried material. Mesh partitions also prevent the material from slipping over their surface and contribute to the pouring of material.

Figure 1 - shows a longitudinal section of a drum dryer for bulk thermosensitive materials; figure 2 is a section aa of figure 1.

Drying for bulk thermosensitive materials (figure 1) contains a rotating housing 1, on the inner surface of which a nozzle 2 is fixed, made in the form of four mesh radial partitions 3 located at an angle of 90 ° to the neighboring ones and form sectors 4 (figure 2). At one end end of the housing 1, a loading device 5 is installed in the form of a loading chute, an air heater 6 and a fan 7, and an unloading hopper 8 is located on the other end side. The rotating housing 1 is mounted on shafts 9 based on four rollers 10, of which two are driven. To eliminate the axial movement of the housing 1 there are guide rollers (not shown). The drive is carried out from the electric motor 11 and the gearbox 12. The control panel (not shown) is used to control the temperature using the sensor 13 installed in zone 14. The feed hopper 15 and the coolant outlet pipe 16.

The housing 1 of the drum is installed with an inclination towards the discharge end.

A drum dryer operates as follows.

From the hopper 15 for estrus 5 in the housing 1 of the drum dryer serves wet granular product that needs to be dried. Using the electric motor 11 and the gearbox 12 rotate the drum with a certain speed, for example, 6-10 rpm As a result of rotation of the housing 1, the product layer is mixed. The fan 7 and the air heater 6 are turned on, which form a coolant flow and feed it into the drying space

casing 1. The waste heat carrier from the casing 1 is discharged through the pipe 16. The product is dried in direct flow with the heat carrier. With partitions 3 of nozzle 2, the product mixes well throughout the entire volume of housing 1. Housing 1 is installed with an inclination towards the discharge end, therefore, the material to be dried is mixed to the discharge hopper 8, being exposed to the heat carrier and mixing by sectors 4. The dried material is removed through the discharge hopper 8. The control panel (not shown) controls the temperature of the coolant using the sensor 13.

The drum dryer allows drying of pollen with an initial humidity of 25% to a final moisture content of 9% at a temperature of 40 ° C. The design of the radial partitions of the inventive drum dryer allowed to abandon the use of a Central perforated pipe. At the same time, drying efficiency is ensured due to mesh radial partitions. The use of radial partitions of this design allowed to reduce the weight of the drum dryer and the energy costs of its rotation.

The use of such a nozzle makes it possible to reduce the size of the outer diameter, to ensure uniform distribution of the material over the entire volume of the drum and creates sparing conditions for heating the transported (poured) material along the sectors, which increases the volume of evaporated moisture, ensures uniform drying of pollen, and reduces drying time. Sliding pouring along sectors provides contact heat transfer between pollen and drum material, which intensifies the process of drying pollen.

Sources:

1. "Technology for the production and processing of beekeeping products", G. Tunikov et al. - Moscow: Kolos, 2001.

2. RF patent No. 614301

Claims (1)

A drum dryer for bulk thermosensitive materials, comprising a rotating casing with a built-in nozzle with radial partitions located in the drying space, in communication with a coolant supply system, loading and unloading devices mounted on opposite ends of the housing, characterized in that the nozzle is made in the form of four mesh radial partitions connected in the center of the housing by one common rib and located at an angle of 90 ° each subsequent relative to the previous th.