Pre-drying device for cold-pressed pellets

Abstract

The utility model discloses a pre-drying device for cold-pressed pellets, and belongs to the technical field of dryers. The device comprises a box body, the box body is divided into two parts, namely an upper-layer box body and a lower-layer box body, a feeding hole is formed in the top of the upper-layer box body, a plurality of partitions are vertically arranged in the upper-layer box body, a coil pipe is arranged in each partition, a coil pipe is arranged on the surface of the lower-layer box body, and the upper-layer box body and the lower-layer box body are mutually connected. The coil pipe is communicated with a steam pipeline in a workshop, and a blanking valve is arranged at the lower end of the lower-layer box body. According to the utility model, under the condition of no high-temperature flue gas or heat source, a low-temperature heat source steam is used for heat exchange, and the ventilator is used for increasing air circulation to take away moisture, so that the pellets are dried until the moisture of the cold-pressed pellets reaches the use standard. The device has the advantages of high reliability, high safety, wide application range, simplicity in operation, cost saving and the like. At present, the equipment is put into daily production, the effect is remarkable, and the problem that the cold-pressed pellets cannot be dried by a low-temperature heat source is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of drying machines, and in particular relates to a pre-drying device for cold-pressed pellets. Background Art

[0002] The steel powder briquetting project in the cement workshop mainly involves evenly mixing the steel powder, scale and adhesive from the magnetic separation of the converter steel slag into a briquetting machine to produce 40×40mm pellets. The pellets are mainly used as auxiliary materials for converter cooling. The average moisture content of the newly produced pellets is about 6%, which cannot be directly used in the converter. The pellets need to be dried in a dryer to a moisture content of less than 2% to meet the use requirements. The existing cold-pressed pellet drying basically uses a high-temperature heat source of more than 300 degrees Celsius in a hot air furnace for drying. For drying conditions without a high-temperature medium heat source, the moisture and efficiency problems of pellet drying cannot be solved. Utility Model Content

[0003] In view of the above problems existing in the prior art, the purpose of the utility model is to provide a pre-drying device for cold-pressed pellets.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0005] A pre-drying device for cold-pressed pellets comprises a box body, wherein the box body is divided into two parts, namely an upper box body and a lower box body, a feeding port is arranged on the top of the upper box body, a plurality of partitions are vertically arranged inside the upper box body, coils are arranged inside the partitions, coils are arranged on the surface of the lower box body, the coils are connected to the steam pipes in the workshop, a blanking valve is arranged at the lower end of the lower box body, and pellet drying can be achieved by using low-temperature heat source steam for heat exchange, until the moisture content of the cold-pressed pellets reaches the use standard.

[0006] Furthermore, it also includes a ventilator, which is arranged outside the box body, and the air outlet of the ventilator is connected to the ventilation pipe outside the lower box body. The ventilation pipe is provided with a through hole for ventilation to increase air circulation and take away moisture.

[0007] Furthermore, a collecting trough is provided below the blanking valve. When the pellet storage reaches a time limit, the blanking valve is opened and the pellets are discharged into the collecting trough.

[0008] Furthermore, it also includes a belt conveyor, one end of which is arranged below the aggregate trough, and the pellets are discharged into the aggregate trough and transported by the belt conveyor.

[0009] Furthermore, the partition is provided with through holes for heat dissipation to increase the heat dissipation area and achieve a better drying effect.

[0010] Furthermore, the upper box is in a rectangular shape to increase the storage capacity of the pellets.

[0011] Furthermore, the lower box body is an inverted three-dimensional trapezoid to facilitate material cutting.

[0012] Furthermore, the distance between the partitions is less than 30 cm, and the loading layer of this size can be dried better.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] Under the condition of no high-temperature flue gas or heat source, the utility model can use low-temperature heat source steam for heat exchange, use a ventilator to increase air circulation to take away moisture, and achieve pellet drying until the moisture of the cold-pressed pellets reaches the use standard. It has the advantages of strong reliability, high safety, wide range of use, simple operation and cost saving. The equipment has been put into use in daily production with remarkable effects, solving the problem that low-temperature heat sources cannot dry cold-pressed pellets. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a pre-drying device for cold-pressed pellets according to the utility model;

[0016] In the figure: 1. Upper box; 2. Partition; 3. Lower box; 4. Ventilation duct; 5. Coil; 6. Drop valve; 7. Collecting trough; 8. Belt conveyor. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with specific embodiments.

[0018] like Figure 1 As shown, the utility model mainly includes a box body, which is divided into two parts, namely an upper box body 1 and a lower box body 3. The upper box body 1 is designed to increase the storage capacity of pellets, and the structure is set to be a rectangular parallelepiped. A feed port is provided on the top of the upper box body 1, and a number of partitions 2 are vertically provided inside. The preferred number in this embodiment is 5. A coil 5 is provided inside each partition 2, and the coil 5 is connected to the steam pipe in the workshop. Through holes are provided on the surface of the partition 2 to increase the heat dissipation area, and the distance between the partitions 2 is controlled within 30 cm. The lower box body 3 is designed to be an inverted three-dimensional trapezoid for easy material discharge, and a blanking valve 6 is provided at its lower end, and multiple sections of coils 5 are provided on its upper surface according to the structure to increase the contact area and better meet the drying requirements.

[0019] The utility model also includes a ventilator and a belt conveyor 8. The ventilator is arranged outside the box, and the air outlet of the ventilator is connected to the ventilation pipe 4 outside the lower box 3. The ventilation pipe 4 is provided with a through hole for better ventilation inside the box and improving the ventilation of the pellets inside the box. The collection trough 7 is arranged below the blanking valve 6. In this embodiment, the preferred collection trough 7 is funnel-shaped, and one end of the belt conveyor 8 is arranged below the collection trough 7. When the pellet storage reaches the time limit, the blanking valve 6 at the bottom is opened, and the pellets are discharged into the collection trough 7 and transmitted through the belt conveyor 8.

[0020] In this embodiment, the preferred blanking valve is a gate valve.

[0021] like Figure 1 The pre-drying device for cold-pressed pellets shown in the figure is specifically operated by first loading the cold-pressed pellets into the feed port at the top of the upper box 1 with a loader. After loading the pellets, open the steam valve, and then open the ventilator connected to the ventilation pipe 4 outside the lower box 3. At this time, the steam pipe in the workshop starts to transport steam, the coil 5 is heated, and the ventilation pipe 4 also ventilates the inside of the box. After working for a certain period of time, the upper and bottom materials are sampled and tested for moisture. After the moisture is qualified, start the belt conveyor 8, open the bottom drop valve 6 of the lower box 3, and the pellets fall into the funnel-shaped collecting trough 7, and are transported to the loader hopper through the belt conveyor 8 below. After being loaded into the dump truck, they are transported to the converter for use.

[0022] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any modification without creative work made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A pre-drying device for cold pressed pellets, characterized in that: The invention comprises a box body, wherein the box body is divided into two parts, namely an upper box body (1) and a lower box body (3). A feed port is provided at the top of the upper box body (1). A plurality of partitions (2) are vertically provided inside the upper box body (1). Coils (5) are provided inside the partitions (2). Coils (5) are provided on the surface of the lower box body (3). The coils (5) are connected to a steam pipe in a workshop. A feed valve (6) is provided at the lower end of the lower box body (3).

2. A pre-drying device for cold pressed pellets according to claim 1, characterized in that: It also comprises a ventilator, which is arranged outside the box body, and the air outlet of the ventilator is connected to the ventilation pipe (4) outside the lower box body (3), and the ventilation pipe (4) is provided with a through hole for ventilation.

3. The pre-drying device for cold-pressed pellets according to claim 1, characterized in that: A material collecting trough (7) is provided below the material dropping valve (6).

4. A pre-drying device for cold pressed pellets according to claim 3, characterized in that: It also includes a belt conveyor (8), one end of which is arranged below the aggregate trough (7).

5. The pre-drying device for cold-pressed pellets according to claim 1, characterized in that: The partition (2) is provided with through holes for heat dissipation.

6. A pre-drying device for cold pressed pellets according to claim 1, characterized in that: The upper box body (1) is in the shape of a rectangular parallelepiped.

7. The pre-drying device for cold pressed pellets according to claim 1, characterized in that: The lower box body (3) is an inverted three-dimensional trapezoid.

8. The pre-drying device for cold-pressed pellets according to claim 5, characterized in that: The distance between the partitions (2) is less than 30 cm.

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