KR100623188B1 - Ventilative dryer equipped rotational agitator - Google Patents

Abstract

The present invention relates to a batch-type industrial dryer with a wide selection of drying energy, economical, high energy efficiency of the drying gas, significantly reduced the risk of explosion during the drying process, the safety of the device is significantly improved.

In the rotary stirring aeration dryer according to the present invention, a) explosion-proof safety hatch is installed in the upper end of the rectangle, the outlet opening and closing by the outlet cover is formed in the lower portion, the outlet opening for introducing dry gas is left and right lower region ( B) the drying chamber formed on the circumferential surface) and b) the lower left region (circumferential surface) of the drying chamber so as to conceal the discharge port, and a fixing frame for connecting a dry gas generator having a conventional structure is provided on the front surface. It is installed in the drying gas supply chamber and c) drying periodically reverse the direction of rotation is reversed, a stirrer, and that d) the support is that the drying chamber, and the actuator for opening and closing the outlet comprises a lower frame installed to one side.

Industrial dryer, dryer, rotary, agitation, aeration, batch type, direct fire, indirect fire, explosion proof safety hatch, explosion proof safety valve, static stirrer, accumulator, dry gas discharge pad, stirring vane, stirring vane

Description

Ventilative dryer equipped rotational agitator

1 is an overall configuration diagram of a rotary stirring aeration dryer according to an embodiment of the present invention.

FIG. 2 is a detailed view of the dry gas supply chamber shown in FIG. 1. FIG.

3 is a detailed view of the forward and reverse stirrer shown in FIG. 1.

4 is a detailed view of the hydraulic drive system shown in FIG.

FIG. 5 is a detailed view showing the periphery of the outlet cover of the lower part of the drying chamber shown in FIG.

6 is a detailed view of the explosion-proof safety valve and explosion-proof safety hatch shown in FIG.

[Description of Drawing Reference]

One… Rotary stir aeration dryer 2. Drying room

3... Static agitator 4... Dry gas supply chamber

5... Dry gas supply port 6. Dry Gas Generator Fixed Frame

7... Explosion proof safety valve 8. Weight regulator

9... Dry gas discharge pad 10... Stirring

11... Stirring stir 12. Drive sprocket

13... . Hydraulic pump 14.. Accumulator

15... Hydraulic motor 16.. Speed sensor

17... Lower frame 18... Actuator

19... Explosion proof safety hatch 20.. Limit switch

21... Winch 22... Exhaust manifold

23... Exhaust fan 24.. outlet

25... Outlet cover

The present invention relates to a batch type industrial dryer. ① Almost any heat source can be used. As the choice of energy becomes wider, ② economical, ② dry gas is supplied deep into the material layer to be dried, and energy efficiency is high. ③ human / material safety in the drying process. This invention relates to a rotary aeration dryer having improved safety by solving an explosion problem that acts as a hazard.

The drying process is divided into continuous or batch type depending on how the dehydration process from the previous stage is operated.

For example, when a large-capacity dewatering device such as a scrudent or a belt press is employed in the dewatering process, a continuous dryer is employed in the subsequent drying process so that the material continuously discharged from the dewatering device can be efficiently dried. Such continuous dryers are mainly used in the environmental industry.

On the other hand, filter presses, which are widely used at present, are used in a drying process because a material to be dehydrated is supplied and processed in batches. Other small-capacity continuous dehydration devices such as drum screens or centrifugal filters are used in the manufacture of tofu or folk liquor, but the ingredients are collected until the amount to be dried is not enough for one serving, and the batch dryer is used. May be dried. Such a batch dryer is used in the pharmaceutical industry, the food industry, the chemical industry, etc., and a box type that can be ventilated is the mainstream.

In addition, a dryer may be classified into a direct type in which a high temperature combustion gas is in direct contact with a dry material and an indirect type in which dry air heat-exchanged while passing through a radiator is in contact with a dry material. Since it was determined as diesel, electricity, waste heat, LNG, etc., there was a disadvantage in that the selection of the heat source was not free.

On the other hand, the efficiency of the dryer is determined by the contact area between the drying material and the drying gas and how quickly the moisture discharged during the drying process is discharged without affecting the internal temperature of the dryer. The stirring blade lengths of all were the same, and the stirrer continued to rotate only in one direction, resulting in a slight compression of the dry material. Therefore, the contact efficiency between the dry gas and the drying material is low, there is a disadvantage that the thermal efficiency is low.

In addition, the conventional dryer uses a variety of safety devices to prevent explosion accidents during operation, but generally has a disadvantage in that the structure is complicated and often malfunctions and expensive.

The present invention has been made in order to improve the above-mentioned conventional problems, ① by changing the structure of the connection portion of the dryer connected to the heat source generator to be applied to any kind of heat source and ② as a safety device to prevent the explosion accident of the dryer simple It does not malfunction by adopting the weight regulator of the structure. ③ By installing the stirrer in which the stirring blades of different lengths are alternately arranged in the axial direction in the drier, the rotational direction of the stirrer is reversed periodically to dry the drying material and It is an object of the present invention to provide a rotary stirring aeration type dryer having a new structure which maximizes the contact area between gases and improves thermal efficiency by about 10%.

Industrial dryers, which are widely used in almost all industries, are newly designed and manufactured almost every time according to the properties of the dry materials, processing capacity, and the requirements of the consumer. In this case, the problem that the manufacturing cost of the device is high and the manufacturing period is long cannot be avoided. Thus, the inventors have given technical compatibility in the manufacture of the dryer in order to solve this problem to reduce the manufacturing cost and operating costs and to calculate a high thermal efficiency.

In the rotary stirring ventilation type dryer of the present invention for solving the above problems, a) explosion-proof safety hatch for drying material is installed in the upper end of the rectangle, the outlet opening is opened and closed by the outlet cover is formed in the lower portion, a plurality of drying The discharge port for gas introduction is integrally formed in the drying chamber formed in the lower left and right lower regions (circumferential surfaces) between the discharge port and the upper end and b) the lower left and right lower regions (circumferential surfaces) of the drying chamber so that the discharge ports are concealed. A dry gas supply chamber having a dry gas generator fixed frame for connecting a dry gas generator having a structure, and c) a forward and reverse stirrer installed in the interior of the drying chamber and the rotation direction is reversed at regular intervals; and d) the outlet. A lower portion of the drying chamber is supported so that the drying chamber is positioned at a predetermined height from the ground, and an actuator for opening and closing the outlet is installed at one side. Characterized in that the configuration including the lower frame.

Preferably, a drying gas discharge pad which covers the discharge port and at the same time changes the flow direction of the drying gas by 90 ° is additionally installed on the inner surface of the drying chamber, or a plurality of stirring vanes and stirring vanes are provided along the longitudinal direction of the static stirrer. Arranged alternately, the stirring blades and the stirring stages are arranged at an interval at an interval corresponding to three times the length of the shaft diameter of the stationary stirrer, or an explosion-proof safety valve is installed at the rear end side of the dry gas supply chamber, or one of the stationary stirrers. A driven sprocket installed at the side end is connected to a chain with a drive sprocket mounted on a rotating shaft of the hydraulic motor, and the hydraulic motor is driven at a constant hydraulic pressure through an accumulator.

Hereinafter, with reference to the accompanying drawings, it describes the configuration and operation of the rotary stirring aeration dryer according to an embodiment of the present invention.

Example

1 is an overall configuration diagram of a rotary stirring aeration dryer according to an embodiment of the present invention, and FIGS. 2 to 6 are detailed views of main components.

As can be seen in Figure 1, the rotary stirring aeration dryer 1 of the present embodiment is for driving the lower frame 17, the drying chamber 2, the forward and reverse stirrer 3, the dry gas supply chamber 3 and the forward and reverse stirrer. It is composed of a hydraulic system, and means are provided at the upper and lower portions of the drying chamber, respectively, for introducing the drying material into or out of the drying chamber.

하기 위해 평편하게 만든 하단부분과 방폭안전해치(19)가 형성된 장방형의 상단부분을 제외하면 대체로 원통형에 가깝게 되어 있는데, 장방형의 상단부분은 높이가 건조실(2) 전체 높이의 약 20% 수준에 이르기 때문에 건조실(2)을 전면에서 바라보면 목이 짧은 둥근 플라스크 모양과 유사하다. 또한, 건조실(2)의 좌·우측 면 중 하단부분의 배출구와 정역 교반기(3)의 중심선 하부 사이로 정의되는 표면영역에는 상기 건조실이 직화식으로 운전되는 경우 연소공간으로 이용되고 간접화식으로 운전되는 경우 건조가 스를 공급하는 챔버의 역할을 하는 건조가스공급챔버(4)가 각각 설치되어 있다.As shown, the drying chamber 2 is firmly supported on the lower frame 17 so that the outlet formed in the lower portion is located at a considerable height from the ground. The drying chamber 2 is made of a SUS-based steel sheet having excellent corrosion resistance when the corrosive dry material is used, and when the dry chamber 2 is made of a dry material such as dyes, pigments, coal, and sand, which can be almost ignored. It is made of steel plate. In addition, in terms of shape, the drying chamber 2 forms an outlet.

Except for the flat bottom part and the upper part of the rectangle where the explosion-proof safety hatch (19) is formed, it is generally close to a cylindrical shape. The upper part of the rectangle reaches a height of about 20% of the total height of the drying chamber (2). Therefore, when looking at the drying chamber (2) from the front is similar to the shape of a short round neck flask. In addition, the surface area defined between the outlet of the lower part of the left and right sides of the drying chamber 2 and the lower portion of the center line of the stationary stirrer 3 is used as a combustion space when the drying chamber is operated directly and indirectly operated. In this case, a dry gas supply chamber 4 serving as a chamber for supplying dry gas is provided.

In addition, the exhaust manifold 22 which sucks and discharges the moisture gas by the suction action of the exhaust fan 23 is in communication with the upper end of the drying chamber so that the moisture gas generated in the drying process can be discharged to the outside. According to this structure, in the subsequent treatment of the humidified gas or exhaust gas discharged from the drying chamber, it is possible to easily discharge the gas by installing a flue to the post-treatment device.

In Figure 2, the drying gas supply chamber (4), left and right side of the sign drying chamber enclosed is made of a metal "]" shape angled drying gas discharging pads (9) are apart from each other to put the left and right inner surfaces of the drying chamber There are a plurality of installations, each of which is covered by the drying gas discharge pad 9, each discharge port is drilled through the discharge port to blow dry air into the drying chamber. That is, the dry gas injected into the drying chamber 2 is supplied from the dry gas generator (not shown) connected to the dry gas generator fixing frame 6 to the dry gas supply port 5 → dry gas supply chamber 4 → discharge port →. The drying gas discharge pad 9 → the drying material layer → the inside upper part of the drying chamber → the exhaust manifold 22 → exits.

In particular, the dry gas supplied from the dry gas supply chamber 4 through the discharge port and the dry gas discharge pad 9 into the drying chamber 2 has a 90 ° phase change in the flow direction of the dry gas by the dry gas discharge pad. By spraying along the inner surface of the drying chamber 2 at a uniform speed, the supply of dry gas can be made quickly, and the problem that the discharge port is blocked by the dry material by the protective action of the drying gas discharge pad 9 is eliminated. .

Here, the dry gas discharge pad 9 of the present embodiment may be manufactured in a circular arc shape but its shape is an angular shape. In addition, the lower frame 17 shown in FIG. 1 is manufactured in a structure in which the drying chamber 2 having the dry gas supply chamber 4 can be stably fixed, but also a table for placing other components such as a dry gas generator. It can also be produced in other forms.

In FIG. 3, the stationary agitator 3 freely installed at a position slightly lower than 1/2 of the height of the drying chamber 2 is basically manufactured in the form of a hollow steel pipe so as to sufficiently resist the torsional stress, and the dry material In case of corrosion resistance, SUS steel pipe is used. In case of corrosion resistance, general steel pipe is used.

Stirring blades 10 and stirring blades 11 alternately installed at appropriate intervals along the longitudinal direction of the stationary stirrer 3 have a difference in length of about 7 to 10 mm, when the stationary stirrer 3 is rotated. The stirring blade 10 is installed at a point where there is no fear of colliding with the drying gas discharge pad 9, and the stirring tip 11 is installed at a portion passing over the point where the drying gas discharge pad 9 protrudes. Here, the stirring vanes 10 and the stirring vanes 11 are arranged at right angles to each other at intervals corresponding to three times the length of the shaft diameter of the stationary stirrer 3, but preferably have relatively narrow edges facing the ground. Do.

In addition, the direction of rotation of the stationary stirrer 3 is reversed every 5 minutes to prevent the drying material filled in the drying chamber 2 from compacting to one side and to reduce frictional resistance (rotational resistance) with the drying material. It is desirable to make. In this case, the dry gas is smoothly supplied into the dry material layer while the clogging phenomenon of the discharge port is prevented by the interaction between the stirring vane 10 and the stirring vane 11.

4 is a detailed view of a hydraulic system for driving the forward and reverse stirrer of the above configuration, in which the drive sprocket 12 connected to the driven sprocket mounted at one end of the forward and reverse stirrer 3 is connected to the drive sprocket 12 and the drive sprocket 12. It consists of a hydraulic motor 15 for transmitting rotational force through the connected shaft, an accumulator 14 for supplying a constant hydraulic pressure to the hydraulic motor, a hydraulic pump 13 connected to the accumulator 14. According to such a configuration, a large output can be obtained even with a hydraulic pump having a relatively small capacity. For example, when the engine speed is maintained at 2500 rpm in a grandeur equipped with a 3000 kPa gasoline engine, the torque is 35-40 kg · m. In the embodiment, a torque of about 400 kg · m was obtained when the rotational speed of the hydraulic motor 15 was 200 rpm.

In general, the dry material introduced at the beginning of the drying process contains a lot of water, so a large torque is required when stirring, while the water is gradually removed according to the progress of the drying operation to decrease the volume and reduce the frictional resistance, thereby reducing the torque. do. In this embodiment, the hydraulic pump 13 is a speed sensor by installing a speed sensor 16 in the hydraulic motor 15 so that the stationary stirrer 3 is in constant speed operation regardless of the torque fluctuation. Feedback control was made by the detection value of (16).

5 is a detailed view showing the periphery of the outlet of the lower part of the drying chamber.

In the figure, the outlet 24 formed at the lower end of the drying chamber 2 is covered with an outlet cover 25 which is hinged to the surface of the drying chamber on one side and whose rim is reinforced with “L” section steel. The width is made about 30% wider than the width of the outlet. In addition, by welding the processing member of the "V" shape on the edge of the outlet 24 and the surface of the outlet cover 25 which is in contact with the edge, the leakage of GAS or dry material in the state that the outlet cover 25 is closed This did not occur at all.

In addition, a piston of the actuator 18 for opening and closing the outlet cover is connected to the “┌┐” shaped steel provided at the center of the surface of the outlet cover 25 in an inclined state of about 45 °. Here, the outlet cover is shown in the figure in a rounded surface, but may be produced in a flat panel form.

In addition, the size of the outlet cover 25 is enough that the deformation does not occur while the discharge of the dry material is made smoothly, the connection angle of the actuator 18 can also vary depending on site conditions, a plurality of outlet cover When arranging, in principle, what is necessary is just an interval which can completely discharge the dry material inside a drying chamber in the state which the static stirrer 3 rotates.

6 is a detailed view of the explosion-proof safety valve and the explosion-proof safety hatch.

As shown in the figure, the rotary stir aeration dryer 1 according to the present embodiment serves as a manhole during maintenance while being used as an inlet for dry material on the upper surface of the drying chamber 2 to solve an explosion problem that may occur during the drying process. Explosion-proof safety hatch 19 is installed, the size of the reflection pressure (operating pressure) in accordance with the internal pressure of the dry gas supply chamber 4 due to the change in position of the adjustment nut fitted to the weight control body 8 An explosion-proof safety valve 7 which is adjusted by the change of the center (self-weight) is provided on the rear end side of the dry gas supply chamber 4. In addition, the cable is released from the winch fixed to the building wall is connected to the end of the explosion-proof safety hatch 19, the limit switch 20 is installed in the hinge portion of the explosion-proof safety hatch. . Therefore, when the internal pressure of the drying chamber 2 rises and the explosion-proof safety hatch 19 is suddenly opened, the explosion-proof safety hatch touches the limit switch 20, and in this process, the winch connected to the limit switch 20. (21) is driven to maintain the open state of the explosion-proof safety hatch (19) by winding the cable for a set time, the cable is released from the winch (21) when the set time has elapsed so that the explosion-proof safety hatch is closed by its own weight do. However, such opening and closing operation is usually performed by a switch provided separately.

Further, on the rear end side of the dry gas supply chamber 4, a pipe portion inclined obliquely toward the top of the drying chamber 2 and a weight adjuster 8 hinged to the inlet side of the pipe portion as shown in FIG. An explosion-proof safety valve (7) consisting of The weight regulator 8 may be manufactured in various forms. For example, one end is fixed to a stopper of a brass material having a larger area than the inlet area of the pipe part, and the other end is hinged to the outer surface of the drying chamber. It may be composed of a control nut fastened to.

According to this configuration, the opening and closing pressure of the stopper can be adjusted by changing the position of the adjustment nut, and in the case of the direct type, the internal pressure of the dry gas supply chamber 4 increases when a back fire occurs due to incomplete combustion. Even if the pressure is released automatically to protect the device, there is no fear of malfunction because there is no operating part such as a spring.

As another component, a conveyor system may be installed below the drying chamber so that the dry material discharged from the drying process may be transferred to the subsequent process by the conveyor.

According to the rotary stir aeration dryer of the present invention configured as described above, since almost all kinds of heat source generators can be connected to the dry gas supply chamber, the energy selection range is wider and economical.

In addition, it is possible to supply the dry gas deep inside the drying material layer by the stationary stirrer alternately installed between the stirring blade and the stirring terminal, which is high in energy efficiency, and the clogging of the discharge port is completely eliminated by the drying gas discharge pad installed in the drying chamber. Can be. Therefore, by adjusting the temperature of the drying gas and the residence time in the drying chamber, it is possible to reach a final water content of 1% or less (based on DB).

In addition, due to the explosion-proof safety hatch installed in the upper part of the drying chamber and the explosion-proof safety valve installed at the rear end side of the drying gas supply chamber, an explosion problem acting as a risk factor for human / physical safety in the drying process can be solved.

In addition, due to the discharge port installed in the lower portion of the drying chamber is hygienic because the interior of the drying chamber can be easily made.

In addition, the drying material is moved to the explosion-proof safety hatch → drying chamber → outlet, it is possible to prevent mixing between materials of different degrees of drying.

Therefore, when the dryer of the present invention is used in a subsequent process of a batch dehydration process or a continuous dehydration process operated at a small scale, it is expected that the equipment cost and operating cost can be greatly reduced.

Claims (5)

Explosion-proof safety hatch for drying material is installed in the upper part of the rectangle, the outlet opening and closing by the outlet cover is formed in the lower portion, and a plurality of dry gas introduction outlets in the lower left and right areas between the outlet and the upper portion ( A drying chamber formed on the circumferential surface; A dry gas supply chamber which is integrally formed in the lower left and right lower regions (circumferential surfaces) of the drying chamber so that the discharge port is concealed, and which has a dry gas generator fixing frame for connecting a dry gas generator having a normal structure on the front surface thereof; A forward and reverse stirrer installed inside the drying chamber, the rotation direction of which is reversed at regular intervals; A lower frame supported by the lower part of the drying chamber so that the outlet is located at a predetermined height from the ground, and an actuator installed at one side to open and close the outlet; Rotary stirring aeration dryer comprising a. The method of claim 1, And a drying gas discharge pad disposed at an inner surface of the drying chamber to cover the discharge port and at least 90 ° to change the flow direction of the drying gas. The method according to claim 1 or 2, A plurality of stirring vanes and stirring vanes are alternately arranged along the longitudinal direction of the stationary stirrer, wherein the stirring vanes and the stirring vanes are arranged at right angles at intervals corresponding to three times the length of the shaft diameter of the stationary stirrer. Rotary Stirring Aeration Dryer. The method according to claim 1 or 2, Rotary stir vent type dryer, characterized in that the explosion-proof safety valve is installed at the rear end of the drying gas supply chamber. The method according to claim 1 or 2, A driven sprocket installed at one end of the stationary stirrer is connected to a chain with a drive sprocket mounted on a rotating shaft of the hydraulic motor, and the hydraulic motor is driven by a constant hydraulic pressure through an accumulator.

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