JP3210302U - Drying equipment - Google Patents

Abstract

The present invention provides a drying apparatus that efficiently performs pulverization and drying of a hydrous muddy raw material containing large, medium, and small lumps so that the pulverized powder of the raw material and the crushed lumps do not remain in the drying container. . [Means for Solution] A raw material put into a drying container is pulverized by a pulverizing means, and a turbulent flow is generated by an agitating means that generates a complicated flow between the raw material and the drying air. A means for discharging the lump from the drying container is provided to eliminate the residue of the raw material in the drying container, the raw material is reground by the blower 2 connected to the drying container, the raw material is sent to the powder collecting device 3 and dried. Collect the raw materials. [Selection] Figure 1

Description

  The present invention is for efficiently drying a water-containing mud raw material in which lumps of various sizes and hardness are mixed.

  In the conventional method, drying air is blown into a drying container to pulverize the raw material, and drying is performed.

JP 2009-250507 A

There is a method to dry hydrous mud-like raw materials with a mixture of various sizes and hardnesses by sending dry air into the drying container and crushing and drying. However, powder and lump remain inside the drying container. Then, exposure to high temperature dry air for a long time often causes a loss of moisture, causing burnt spots or burning, which is often a problem.
In order to avoid kogation and combustion, the drying air temperature may not be maintained at a high temperature, which causes a decrease in drying efficiency. For this reason, a drying apparatus having an effective method for removing the adhering powder on the inner wall of the drying container and preventing the residual of the pulverized powder inside the drying container and the lump after pulverization is combined with an efficient drying process in a short time at a high temperature. The purpose is to provide.

In order to achieve the above object, in the drying apparatus of the present invention, a drying air inlet is provided in at least one upstream portion of the cylindrical drying container,
A raw material supply port is provided upstream of the drying container,
Provided stepwise with blade members attached radially to a hollow rotating shaft,
A hollow crushing member radially attached to a hollow rotating shaft is provided in a step shape,
A member having a groove facing the inner wall surface of the drying vessel provided in the axial direction of the drying vessel communicating with the hollow portion of the grinding member at the end of the hollow grinding member;
A disk attached to the rotary shaft at the bottom bottom of the drying container and a blade member arranged radially on the disk,
It is characterized in that a drying air outlet disposed in the outer peripheral tangential direction is provided at the downstream bottom of the drying container.

In the drying device of the present invention,
A member having a groove along the axial direction at a position close to the inner wall surface of the drying container is attached to the tip of a hollow pulverizing member, the hollow pulverizing member is radially attached to a hollow rotating shaft, and the rotating shaft and the pulverizing member are hollow. The hole and the groove of the member are connected,
As a means for sending fluid to the hollow part of the hollow rotating shaft or sucking fluid from the hollow part, it is characterized by comprising any means of a blower, a pump, an air compressor, an ejector, or a combination thereof. .

In the drying device of the present invention,
A jacket is provided on the outer periphery of the drying container, and a means for adjusting the temperature of the inner wall of the drying container is provided.

  The drying device of the present invention is characterized in that a blower device is connected to the downstream of the drying container, and a powder collecting device for collecting dried matter is provided.

  The present invention is characterized by efficiently pulverizing, stirring and drying the raw material, and eliminating the residue of the pulverized raw material powder and the crushed lump in the drying container. Can solve the problem of burning and burning, and can improve the quality, and at the same time, drying at high temperature is possible and the drying efficiency can be improved.

1 is an overall front view of a drying apparatus according to an embodiment of the present invention. It is front sectional explanatory drawing of the drying apparatus of FIG. It is a plane explanatory view of the drying device of FIG. It is explanatory drawing of a rotating shaft, a member, and a blade | wing. (X is a plan view, Y is a front view, Z is a right side view) It is front sectional explanatory drawing of an attached powder removal apparatus. FIG. 6 is an explanatory diagram of a WW cross section of FIG. 5.

  FIG. 1 shows an overall layout. The present invention pulverizes raw materials, stirs the raw materials and dry air, and removes the resulting pulverized powder and crushed lump, a drying apparatus 2 connected thereto, and the raw materials after pulverization and drying It is comprised by the powder collection apparatus 3 which collects.

  The raw material is supplied from the charging portion A of the rotary valve 101 at the top of the cylindrical drying container 102 shown in FIG. The raw material is dried by a powerful swirling flow of several hundreds of degrees Celsius dry air supplied from the inlet tangentially attached to the outer periphery of the drying container at the upper part of the drying container 102, in this example, B and C in FIGS. The raw material and the drying air are mixed in the container, and drying is performed when the raw material is introduced. At the same time, the raw material is pulverized by the pulverizing member 104 attached to the rotating shaft 103 set to the optimum rotational speed by the inverter, the dry air and the pulverized raw material are stirred by the stirring blade 106, and the dry air and the pulverized raw material are mixed. Contact is promoted.

The adhering powder on the inner wall of the drying container 2 is a groove opened along the longitudinal direction of the inner wall of the drying container at the tip of the hollow crushing member 104 attached to the hollow rotating shaft 103 as shown in FIG. 5 and FIG. It is removed by the adhering powder removing means constituted by the longitudinal member 105 having
The hollow portions s, t, u serve as fluid passages.

Compressed air is supplied to f1 by the ejector 113, and the gas is sucked from f2. The gas sucked from f2 passes through the passage s of the rotating shaft 103 and the passage t inside the crushing member 104, and finally passes through the groove u of the longitudinal member 105, and is discharged by the rotating shaft 103. The powder adhering to the inner wall surface of the drying container is removed by a synergistic action with the action.
The adhering powder removing gas acts widely in the vertical direction of the inner surface of the drying container by the longitudinal grooves of the member 105 to remove the adhering powder.
As shown in FIG. 4d, by providing a portion where the end of the member 105 overlaps, the action of removing the adhered powder is uniformly applied to the inner wall surface of the drying container, and the powder removal effect is enhanced.

At this time, if normal temperature air is sucked as the gas sucked from f2, the strength reduction due to the temperature rise of the rotating shaft, crushing, and powder removing members 103, 104, and 105 and the stirring blade 106 is reduced by the cooling effect. Therefore, the durability of the member is improved. On the other hand, if high-temperature dry air is sucked, the temperature reduction of the adhering powder removal gas can be reduced and the adhering powder can be removed.
Which to select is determined in consideration of the operating temperature conditions in the drying container, the material of the member used, and the like.
If the fluid is water during maintenance, the inner wall of the drying container can be cleaned efficiently, so that labor can be saved.

  In the present embodiment, the method of discharging the gas from the groove u of the member 105 to remove the adhering powder is shown, but the adhering powder on the inner wall of the drying container can also be obtained by attaching the ejector 113 in the reverse direction and sucking the gas in the drying container. Can be removed. The sucked adhering powder is processed, for example, by returning it to the inlet of the blower.

As a means for removing the attached powder on the upper wall or ceiling of the drying container 102, the attached powder is removed by a high-speed swirling flow of the drying air introduced from the inlet B or C of the drying air provided in the upper part of the drying container. .
An entrance similar to the entrances B and C may be provided in other parts of the drying container to generate a swirling flow and remove the adhering powder.

At the bottom of the drying container 102, a plurality of discharge blades 108 are arranged on the top of a rotating disk 109 attached to the rotating shaft 103 shown in FIGS. The rotation shaft 103 is driven by a motor, and the rotation speed is controlled by an inverter to determine an optimum rotation speed. The pulverized raw material powder is discharged from the outlet D together with the drying air by the centrifugal force of the discharge blade 108 and the suction force of the blower 2 connected to the drying apparatus 1.
The crushed lump on the rotating disk 109 is also discharged from the outlet D by the centrifugal force of the rotating disk 109 and the suction force of the blower 2.
By this means, the pulverized powder and the lump after pulverization are prevented from staying in the drying container to prevent kogation and combustion.

  The raw material discharged from the outlet D at a high speed is collided with the casing 204 by the collision between the rotating blade 203 having sufficient strength, which is attached to the rotating disk 202 which is controlled to the optimum rotational speed by the inverter of the blower 2 and rotates. The pulverized powder and the lump after pulverization are pulverized again and sent to the powder collecting device 3 while being dried.

  The discharge blade 110 at the bottom of the drying container 102 scrapes off the powder that leaks from the gap between the rotating disk 109 and the inner wall of the drying container 102 and stays in the space k, and the scraped powder moves to the outer periphery by centrifugal force. The air is sucked into the pipe 112 by the negative pressure effect caused by the flow of the dry air discharged at a high speed inside the pipe 112 through the pipe 111 and merges with the dry wind. In this way, no pulverized powder remains in the drying container.

  Water or air or other heat exchange medium is allowed to flow inside the jacket 114 provided in the drying container 102 to adjust the temperature of the inner wall surface of the cylindrical container, thereby preventing the adhering powder from sticking to the inner wall at a high temperature. At the same time, the temperature of the fixed powder is adjusted to prevent kogation and combustion.

  The angle of the blade member 106 is indicated by α in (Y) of FIG. 4, but it is 0 ° to ± 90 ° so that the drying air can be sent back upstream or sent horizontally depending on the properties of the raw material and the drying conditions. As appropriate, the stirring action with the raw material is strengthened. In this example, the drying air is sent back upward to generate a turbulent flow to promote contact between the pulverized raw material and the drying air.

  INDUSTRIAL APPLICABILITY The present invention can be used for pulverizing and drying compost, food factory residues, etc., as well as hydrous muddy raw materials in which lumps of various sizes and hardness are mixed. In particular, the present invention is highly useful when it is desired to avoid the burning and burning of the pulverized powder remaining in the drying container and the crushed lump.

DESCRIPTION OF SYMBOLS 1 Drying processing apparatus 2 Air blower 3 Powder collection apparatus 101 Rotary valve 102 Drying container 103 Rotating shaft 104 Grinding member 105 Member 106 Agitation blade 107 Rotating shaft drive device 108 Discharge blade 109 Rotating disk 110 Discharge blade 111 Pipe line 112 Pipe line 113 Ejector 114 Jacket 201 Rotating shaft 202 Rotating disk 203 Rotating blade 204 Casing

Claims (4)

In the drying device of the present invention, at least one or more of the upstream portion of the cylindrical container is provided with a drying air inlet,
A raw material supply port is provided in the upstream part of the cylindrical container,
Provided stepwise with blade members attached radially to a hollow rotating shaft,
A hollow crushing member radially attached to a hollow rotating shaft is provided in a step shape,
A member having a groove facing the inner surface of the cylindrical container provided in the axial direction of the cylindrical container communicated with the hollow part of the pulverizing member at the end of the hollow pulverizing member,
A disk attached to the rotary shaft at the downstream bottom of the cylindrical container and a blade member arranged radially on the disk,
A drying apparatus comprising a drying air outlet disposed in a peripheral bottom tangential direction at a downstream bottom of a cylindrical container. The drying apparatus according to claim 1, wherein
A member having a groove along the axial direction at a position close to the inner wall surface of the cylindrical container is attached to the tip of the hollow grinding member, and the hollow grinding member is radially attached to the hollow rotating shaft. The hole and the groove of the member are connected,
A drying apparatus comprising: a blower, a pump, an air compressor, an ejector, or a combination of these as means for sending fluid to the hollow part of the hollow rotating shaft or sucking fluid from the hollow part . The drying apparatus according to claim 1 or 2,
A drying apparatus comprising a jacket on the outer periphery of a cylindrical container, and means for adjusting the temperature of the inner wall of the cylindrical container.   4. A drying apparatus according to claim 1, further comprising a powder collecting device for connecting a blower to the downstream of the cylindrical container and collecting dried matter.

Images