Hot air sealed material conveying and drying device

Abstract

A hot air sealed material conveying and drying device includes a chassis, a drive unit, a drag unit, idlers, a support plate, side baffles, a sealing groove, and overlapping hot air sealing plates on both sides of the lower part of each support plate. It also includes a conveyor chain, pressure rollers, anti-deviation rollers, a tensioning power unit, a conveyor chain tensioning device, several drying boxes mounted on the drying section in the middle of the chassis, a feed pipe mounted on the top surface of the horizontal section of the chassis, a hot air duct mounted on the chassis, a heat source blower connected to the hot air duct, an exhaust device mounted on the top surface of the end of the horizontal section of the chassis, a discharge pipe mounted on the bottom surface of the head of the chassis, and sealing material inside the sealing groove. This invention features good hot air sealing performance, transmission components are not affected by high temperatures, has a large material handling capacity, a long service life, high energy utilization rate in hot air drying, reduced equipment cost, and high drying thermal efficiency. It can be widely used in drying processes that use hot air to reduce the moisture content of materials.

Description

Technical Field

[0001] This invention relates to a hot air sealed material conveying and drying device, which can be widely used in the drying process of materials to reduce moisture by using hot air, especially in the drying process of ores, slags, metal particles, polymer materials, sludge and agricultural products. Background Technology

[0002] The existing belt dryers have the following problems:

[0003] (1) Low drying efficiency. After the hot air enters the drying equipment, it flows randomly. Because the material is piled up on the conveyor chain, the air resistance is high. A lot of hot air will bypass the material from both sides of the conveyor chain and enter the upper space of the conveyor chain. That is, a lot of hot air does not directly contact the material for heat exchange. The heat exchange with the material is only surface heat exchange, which leads to a large air leakage rate of the drying equipment, a low effective heat utilization rate, and low drying energy efficiency.

[0004] (2) Limited material handling capacity. Hot air can only exchange heat with the surface of the material, which has strict limitations on the thickness of the material layer and the material handling capacity. At the same time, the transmission system of the drying equipment is affected by the high temperature hot air, resulting in a decrease in load-bearing capacity and strength, and it cannot meet the requirements of long-distance transportation. It can only dry lightly loaded materials.

[0005] (3) The transmission device has a short lifespan and high cost. The transmission chain, mesh belt, idler roller, etc. of traditional technology are in direct contact with hot air. Affected by high temperature, the hardness decreases and the wear resistance decreases, resulting in a short equipment lifespan. Even if heat-resistant steel is used to improve the oxidation resistance, the strength will still decrease at high temperature, and it will also lead to an increase in equipment cost, which is not in line with the concept of energy conservation and environmental protection.

[0006] (4) Overall insulation measures are adopted. Hot air fills the interior of the drying equipment, and the high temperature makes it impossible to achieve online manual monitoring and maintenance. If any vulnerable parts malfunction, the machine must be stopped for inspection.

[0007] The shortcomings of existing technologies have constrained the development of drying equipment. Summary of the Invention

[0008] The purpose of this invention is to provide a hot air sealed material conveying and drying device with good hot air sealing performance, transmission components unaffected by high temperature, large material handling capacity, long equipment service life, high hot air drying energy utilization rate, reduced equipment cost, and high drying thermal efficiency.

[0009] This invention relates to a hot air sealed material conveying and drying device, comprising a closed casing, a drive unit installed on the outer side of the casing head, a dragging unit installed on the inner side of the casing head and driven by the drive unit, idler rollers installed on both sides of the casing interior, several support plates mounted on the idler rollers, side baffles overlapping each other on both sides of the middle of each support plate, sealing grooves located below the support plates and installed on the inner wall of the casing, hot air sealing inserts overlapping each other on both sides of the lower part of each support plate, and a closed-loop circulation device located between the idler rollers and the support plates, supported by the idler rollers and mounted on both ends of each support plate, and dragged by the dragging unit. A pair of moving conveyor chains; pressure rollers and anti-deviation rollers installed on the chassis to support the smooth operation of the conveyor chains; a tensioning power unit installed on the outside of the tail of the chassis; a conveyor chain tensioning device installed inside the tail of the chassis and driven by the tensioning power unit; several drying boxes installed on the drying section in the middle of the chassis; a feed pipe installed on the top surface of the horizontal section of the chassis; a hot air duct installed on the chassis; a heat source blower located outside the chassis and connected to the hot air duct; an exhaust device near the inclined section at the tail of the chassis and installed on the top surface of the end of the horizontal section of the chassis; a discharge pipe installed on the bottom surface of the head of the chassis; and sealing material inside the sealing groove.

[0010] The present invention relates to a hot air sealed material conveying and drying device, wherein the bearing plate and its two side baffles form a U-shaped material trough for conveying materials.

[0011] The present invention relates to a hot air sealed material conveying and drying device, wherein the conveyor chain has two sets of parallel sealing grooves installed on both sides below the upper conveyor chain, along the direction of movement of the conveyor chain.

[0012] The hot air sealed material conveying and drying device of the present invention, wherein the sealing groove is a groove with an open top and closed sides and bottom.

[0013] The present invention relates to a hot air sealed material conveying and drying device, wherein the sealing material is a non-volatile liquid or a solid material with good flowability.

[0014] The working principle of the hot air sealed material conveying and drying device of the present invention is as follows:

[0015] (1) Conveyor chain movement: The conveyor chain is installed between the internal idler roller and the pressure roller. The conveyor chain is pulled by the driving device on the head of the machine and tensioned by the tensioning device at the tail of the machine, and performs a closed-loop cycle. Due to the sealing effect of the sealing plates and sealing grooves on both sides of the conveyor chain, the sealing plates of the conveyor chain can be smoothly disengaged from or inserted into the sealing groove.

[0016] The conveyor chain moves in a straight line in the drying section, then rises upward under traction, gradually pulling the sealing plate out of the sealing groove during the lifting process. After being rotated and redirected by the drive device, it reverses direction, moves backward to the tensioning device, and then returns to the forward direction. Under traction, it moves downward, gradually inserting the sealing plate into the sealing material in the sealing groove during the descent, and then moves forward to reach the drying section.

[0017] (2) Material conveying motion: The material enters through the feed pipe and continuously falls onto the conveyor chain inside the machine, moving forward with the conveyor chain. A closed hot air flow channel is formed by a contact friction parallel sealing pair and a hot air duct, and heat exchange is achieved through the contact between the hot air flow and the material. The hot air reaches the bottom of the conveyed material, penetrates the material, and forms strong convection penetration heat exchange. After being dried in the drying section, the material rises with the conveyor chain and is reversed under the action of the drag device, and is discharged from the discharge port under the action of gravity.

[0018] (3) High-temperature hot air flow: Under the action of the blower, the high-temperature hot air enters the internal hot air duct through the air inlets on the sides of several drying boxes in the drying section. It turns 90° and moves vertically upward along the internal hot air duct. Under the sealing effect of the sealing plates and sealing grooves on both sides of the conveyor chain and the sealing plate, the high-temperature hot air passes through the conveyor chain and the material and enters the upper space. After running along the upper space of the conveyor chain, it is discharged by the exhaust device.

[0019] In the hot air sealed material conveying and drying device of the present invention, the length of the sealing groove is greater than the length of the drying section in the middle of the machine box, so as to ensure the length of the sealing pair.

[0020] The present invention relates to a hot air sealed material conveying and drying device, wherein the drying section in the middle of the casing includes several drying boxes, which are connected end to end in sequence and connected to the head and tail of the casing to form a closed casing.

[0021] The hot air sealed material conveying and drying device of the present invention has a double chain structure, that is, a pair of conveying chains are installed at both ends of the bearing plate.

[0022] This invention relates to a hot air sealed material conveying and drying device. The sealing plates of the conveyor chain are inserted into the sealing material in the sealing grooves inside the drying chamber; that is, two sets of sealing plates on the conveyor chain are respectively inserted into two sets of sealing grooves. The function of the sealing plates is to seal the hot air, preventing hot air from flowing out from both sides of the chain. The hot air sealing performance is good, ensuring that the chains on both sides are not affected by high temperatures, and extending the service life of the equipment.

[0023] This invention relates to a hot air sealed material conveying and drying device. The sealed hot air is used entirely for drying the material in the middle of the support plate, preventing hot air from flowing out from both sides. The hot air drying has high energy utilization and high drying thermal efficiency.

[0024] The present invention relates to a hot air sealed material conveying and drying device, wherein a certain number of hot air pipes are installed between the upper and lower conveyor chains, and hot air pipes are installed inside each drying box; the air outlet of the hot air pipes faces the bottom of the upper conveyor chain.

[0025] This invention relates to a hot air sealed material conveying and drying device, wherein the idler rollers are divided into upper and lower layers, which respectively support the upper and lower conveyor chains. The upper idler rollers are located between two sets of sealing grooves on both sides of the hot air duct and the enclosed machine housing, while the lower idler rollers are located below the hot air duct.

[0026] This invention relates to a hot air sealed material conveying and drying device. A sealing groove is filled with sealing material, and a sealing plate of the conveyor chain is inserted into the sealing material within the groove. The sealing material can be a non-volatile liquid or a solid material with good flowability; water can be used as the sealing material. A small upward straight lift along the direction of travel is suitable for solid sealing materials because gravity can increase the return flow of the sealing material, thus controlling the forward movement of the sealing plate. Conversely, when operating conditions permit, downward conveying should be avoided as much as possible. Under the action of gravity and the frictional force of the moving sealing plate, the sealing material will be carried towards the head of the equipment, which may lead to seal failure if the sealing material is not replenished in time.

[0027] This invention relates to a hot air sealed material conveying and drying device. The sealing groove is a long groove into which the sealing plate of the conveyor chain is inserted. During operation, to ensure the normal operation of the conveyor chain, after passing through the drying section, the conveyor chain should gradually lift the sealing plate out of the sealing groove; similarly, before entering the drying section, the sealing plate should be gradually inserted into the sealing groove from the outside. This ensures that the conveyor chain forms a seal with the sealing groove in the drying section and can smoothly detach from the sealing groove in the non-drying section for normal operation.

[0028] This invention relates to a hot air sealed material conveying and drying device. A blower is installed at the inlet of the hot air duct to provide power for the hot air, overcoming the resistance to penetrate the material layer. Simultaneously, the blower provides a certain air velocity to ensure the heat transfer coefficient between the hot air and the material. To control the flow of hot air, an exhaust device is installed at the top outlet to remove the humid, low-temperature air after heat exchange. The exhaust device provides negative pressure, which reduces the air pressure inside the drying section.

[0029] The beneficial effects of the hot air sealed material conveying and drying device of the present invention are as follows:

[0030] (1) The drying section is equipped with a hot air circulation channel. After the hot air flows along the channel, it penetrates the conveyor chain and forms a strong convection heat exchange with the material, thereby improving the hot air utilization rate and drying thermal efficiency.

[0031] (2) Compared with traditional dryers, the hot air circulation channel is sealed and insulated, and the transmission chains on both sides of the conveyor chain are not affected by high temperature. The transmission systems of idler rollers, pressure rollers, anti-deviation rollers, drive mechanisms, and tensioning mechanisms are also outside the hot air duct. The transmission components do not come into contact with the hot air and are not affected by the high temperature. The strength, hardness, and fatigue mechanical properties of these transmission components are not reduced, which can realize the drying of heavy-duty materials, with a large material handling capacity and a long service life of the equipment. The transmission components can use traditional materials and processes, without the need for high-temperature resistant materials and special processes, thus reducing the cost of the equipment and improving its applicability.

[0032] (3) Positive pressure high temperature hot air flows in the sealed channel inside the drying section. In order to make the hot air flow controllable, an exhaust device is installed at the top exhaust port. The exhaust device draws away the humid low temperature air after heat exchange.

[0033] In summary, the hot air sealed material conveying and drying device of the present invention has good hot air sealing performance, transmission components are not affected by high temperature, material handling capacity is large, equipment service life is long, hot air drying energy utilization rate is high, equipment cost is reduced, and drying thermal efficiency is high. Attached Figure Description

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] Figure 1 This is a schematic diagram of the structure of the present invention;

[0036] Figure 2 yes Figure 1 Sectional view A-A in the diagram;

[0037] Figure 3 yes Figure 1 Sectional view B-B in the diagram;

[0038] Figure 4 This is a schematic diagram of the structure of the present invention. Detailed Implementation

[0039] exist Figures 1-4The present invention relates to a hot air sealed material conveying and drying device, comprising a closed casing 1, a drive unit 2 installed on the outer side of the casing head, a dragging unit 3 installed on the inner side of the casing head and driven by the drive unit, idler rollers 4 installed on both sides of the casing, a plurality of bearing plates 5 installed on the idler rollers, side baffles 6 with overlapping sides in the middle of each bearing plate, sealing grooves 7 installed on the inner wall of the casing below the bearing plates, hot air sealing inserts 8 with overlapping sides at the lower part of each bearing plate, and a pair of conveyor chains located between the idler rollers and the bearing plates, supported by the idler rollers and installed on both ends of each bearing plate, and driven by the dragging unit to perform closed-loop circulation. 9. Pressure rollers 10 and anti-deviation rollers 11 installed on the chassis to support the smooth operation of the conveyor chain; tensioning power unit 12 installed on the outside of the rear of the chassis; conveyor chain tensioning device 13 installed inside the rear of the chassis and driven by the tensioning power unit; several drying boxes 14 installed on the drying section in the middle of the chassis; feed pipe 15 installed on the top surface of the horizontal section of the chassis; hot air duct 16 installed on the chassis; heat source blower 17 located outside the chassis and connected to the hot air duct; exhaust device 18 near the inclined section at the rear of the chassis and installed on the top surface of the end of the horizontal section of the chassis; discharge pipe 19 installed on the bottom surface of the head of the chassis; and sealing material 20 inside the sealing groove.

[0040] The present invention relates to a hot air sealed material conveying and drying device, wherein the bearing plate 5 and the two side baffles 6 form a U-shaped material trough for conveying materials.

[0041] In the hot air sealed material conveying and drying device of the present invention, the conveyor chain 6 has two sets of parallel sealing grooves installed on both sides below the upper conveyor chain along the direction of movement of the conveyor chain.

[0042] The hot air sealed material conveying and drying device of the present invention, wherein the sealing groove 7 is a groove with an open top and closed sides and bottom.

[0043] The hot air sealed material conveying and drying device of the present invention, wherein the sealing material 20 is a liquid that does not easily evaporate or a solid material with good flowability.

[0044] In summary, the above description only describes preferred embodiments of the present invention. It should be noted that the present invention is not limited to the specific embodiments described above. The devices and structures not described in detail should be understood as being implemented in the ordinary way in the art. Any simple modifications, equivalent changes and alterations made by those skilled in the art to the above embodiments based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A hot air sealed material conveying and drying device, characterized in that, The system includes a closed chassis, a drive unit mounted on the outside of the chassis head, a drag unit mounted on the inside of the chassis head and driven by the drive unit, idlers mounted on both sides of the chassis interior, several support plates mounted on the idlers, overlapping side baffles on both sides of the middle of each support plate, sealing grooves mounted on the inner wall of the chassis below the support plates, overlapping hot air sealing inserts on both sides of the lower part of each support plate, and a pair of conveyor chains located between the idlers and the support plates, supported by the idlers and mounted on both ends of each support plate, and driven by the drag unit in a closed-loop cycle. The pressure rollers and anti-deviation rollers on the chassis are used to support the smooth operation of the conveyor chain. The tensioning power unit is installed on the outside of the tail of the chassis. The conveyor chain tensioning device is installed inside the tail of the chassis and driven by the tensioning power unit. Several drying boxes are installed on the drying section in the middle of the chassis. The feed pipe is installed on the top surface of the horizontal section of the chassis. The hot air duct is installed on the chassis. The heat source blower is located outside the chassis and connected to the hot air duct. The exhaust device is installed on the top surface of the end of the horizontal section of the chassis near the inclined section at the tail of the chassis. The discharge pipe is installed on the bottom surface of the head of the chassis. The sealing material is installed inside the sealing groove. The aforementioned support plate, together with its two side baffles, forms a U-shaped material trough for conveying materials; The conveyor chain has two sets of parallel sealing grooves installed on both sides below the upper conveyor chain, along the direction of conveyor chain movement. The sealing groove is a groove that is open at the top and closed at the sides and bottom.

2. The hot air sealed material conveying and drying device according to claim 1, characterized in that, The sealant is a non-volatile liquid or a solid material with good flowability.

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