JPS5826724A - Apparatus for transporting powder and particle under high pressure - Google Patents

Abstract

PURPOSE:To improve the preciseness of continuous and constant volume delivery of powder and particles, by conveying the powder and particles in a pressurizing tank by a screw. CONSTITUTION:After loading powder and particles in a pressurizing tank 1, a loading valve 22 and an evacuation valve 23 are closed, and a pressurizing valve 7 and a pressure equalizing valve 9 are opened to raise the pressure in the pressurizing tank 1 to not less than 2kg/cm<2>.G. After pressurizing the tank 1, approximately at the same time when a transport valve 11 and delivering valve 20 are opened, a screw 14 is driven to rotate by a driving apparatus 16. By this process, the powder and particles fluidized on a fluidizing bed 4 in the pressurizing tank 1 are continuously transported in accordance with the rotation of the screw 14 from a powder and particle introducing section 15 through a guide cylinder 12 and through a discharge outlet 19 and the delivering valve 20 into a transport pipe 10. The pressure in the transport pipe 10 is approximately the same as that in the pressurizing tank 1.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-pressure transportation device for powder and granule, which fills a pressurized tank with powder and transports the powder and granule using a carrier gas at a pressure of 2 Y4/ca+ -G or more.

Transport equipment that transports powder and granules through transport pipes using air or a carrier gas such as an inert gas such as N heavy gas has been considerably advanced through various improvements and has reached the present day. The main purpose has been to transport gas at a solid-air ratio through transport pipes. The ultimate purpose is to save energy, but as the field of application of gas transportation has expanded in recent years, there has been a growing demand for quantitative cutting and/or simultaneous and uniform cutting transportation to multiple locations in addition to the above-mentioned purposes.

In order to meet this demand, conventional methods for quantitative cutting of powder and granular materials include installing a rotary valve between the pressurized tank and the transport pipe, or installing a fixed throttle such as an ejector to reduce the cross-sectional area of the pipe to the transport pipe. A method has been adopted in which quantitativeness is maintained by reducing the amount by more than 20%. However, in the former case, the disadvantage is that the amount of powder or granules filled into the rotor, that is, the quantitative nature, varies depending on the amount filled inside the pressurized tank. (due to fluctuations in power) and because the four-stage is divided into several chambers, powder and granules are intermittently supplied to the transport pipe, especially when the rotation Wk of the p-tor is low. It has the disadvantage that intermittent supply becomes noticeable when cutting out the body.

On the other hand, in the case of the latter fixed throttle, an excessive pressure is required compared to the normal transport pressure in order to reduce the flow rate, and the flow rate at the throttle part is high (as a result of this, wear progresses extremely).
The cutting speed gradually changed with the passage of time9, and in order to obtain the actual cutting speed required, there was a tedious trial and error process of testing the drawing shape several times, and the properties of the powder and granules It has drawbacks such as not being able to easily follow changes.

In addition, when distributing and transporting koji evenly to multiple locations, the current method is to connect multiple transport pipes to -1 pressurized tanks and distribute and transport, or use several pressurized tanks containing koji to each pressurized tank. Methods such as connecting one transport pipe have been adopted, but if fixed orifices are provided for each of the equally distributed transport pipes, the same disadvantages as mentioned above will occur, and methods other than fixed orifices will cause the transport pipe itself to By adjusting the length of each transport pipe, the pressure loss of each transport pipe is adjusted and the powder is distributed evenly, but this method has the disadvantage that the transport pipe installation route is restricted.

The present invention aims to provide a new apparatus for high-pressure transportation of powder and granular materials that can eliminate the various drawbacks of the conventional apparatuses described above.

The present invention will be described in detail with reference to the drawings below. (1) is a pressurized tank having a powder input valve (2) and a gas discharge valve (3) at the top, and a fluidized bed (4) at the bottom thereof. A screw insertion hole (5), which will be described later, is also formed in the upper side wall of the fluidized bed (4).

(6) is a pressurizing pipe that supplies pressurized gas such as air or inert gas to the bottom of the pressurizing tank (1) via a pressurizing valve (7);
8) is a pressure equalizing pipe that supplies the same pressurized gas to the upper part of the pressurized tank (1) via the pressure equalizing valve (9); It is possible to omit either the pressurizing pipe (6) or the pressure equalizing pipe (8).

114) is a screw that is inserted into the tank from outside the tank through the insertion hole (5) and whose tip introduction part 05+ faces the fluidized bed (4) from above, and is rotationally driven by a drive device 00 such as a motor. Continuously transfers the powder inside the pressurized tank to the outside according to the rotation.

In this case, the screw I is connected to the tip introduction part (151) of its axis.
It is desirable to arrange the arrangement so that the angle with respect to the horizontal line when viewed from the side, that is, the elevation angle, is within 6 ol in order to maintain quantitative performance (hereinafter simply referred to as quantitative performance) in cutting out powder and granules. Quantitativeness is impaired due to the effect of gravity acting on the powder and powder pressure, and if the elevation angle is selected in the range of 60 to 90, the sliding phenomenon of the powder and granular material in the screw increases, resulting in poor quantitative performance. be damaged.

The 0 barrel is a cylindrical trough that covers the exposed part of the tank (1) of the screw 04, and the left end that extends into the tank is tapered, and there is a powder discharge port on the lower surface of the right end. αI is formed, and its outlet 01 is connected to the transport tQIK via a cut-off valve.

Next, the operation of the above device of the present invention will be explained. First, the gas discharge valve (3) is opened to bring the internal pressure of the pressurized tank (1) to normal pressure, and the input valve (2) is opened to fill the tank with powder. After filling the powder and granular material, open the input valve (2) and discharge valve (3), and at the same time open the pressurization valve (7) and pressure equalization valve (9) to increase the pressure of the pressurization tank (1) to 0 or more on the 2nd/side. do. Almost at the same time when the transport valve αυ and the cut-off valve are opened after the tank pressure is increased, the drive device tt
e Rotate the screw α4 by K.

As a result, the powder and granules in the pressurized tank (1) are transferred to the fluidized bed (4).
), the powder and granules are kept in a constant fluidized state at all times, and are continuously transferred to the outside through the trough 0 to the inside as the screw rotates from the powder introduction part a of the screw to the outside through the outlet a*hb cut-off valve. (2), the gas is supplied to a transport pipe α to which pressurized gas is supplied so that the pressure is approximately the same as that of the pressurized tank (υ), and the gas is transported under high pressure to the destination through this transport pipe.

The quantitative nature of this powdered powder is determined by the gas flow rate supplied from the pressurizing pipe (6) and the blade shape and rotation speed of the screw Q4). Normally, once the screw shape is determined, the quantitative nature is It is determined by the rotation speed and the gas supply amount of the pressurizing tube (6).As a result of the experiment, it was suggested that lower screw rotation speeds provide better quantitative performance compared to high speed rotations. .

As described above, according to the apparatus of the present invention, the granular material in the pressurized tank is continuously cut out by the screw and supplied to the transport pipe, so that the cutting precision of the granular material can be improved, for example. While the constant magnetism of powder and granules in conventional equipment is about ±15%, the present invention makes it possible to suppress the constant magnetism to 3 to 6%. Therefore, it is particularly suitable when the destination is equipment that continuously uses or reacts powder and granular materials, and furthermore, by appropriately selecting the shape of the screw blades, it is possible to transport various powder and granular materials. It has been confirmed that this system is ideal as a transportation device for powder and granular materials, especially after the so-called blowing, in which only pressurized gas flows in the pressurized tank and the powder and granules are not supplied to the transport pipe.

Next, another embodiment of the present invention will be described with reference to FIG. In this example, parts corresponding to those in FIG. 1 are given the same reference numerals and detailed explanation thereof will be omitted. )~
(14b) -1t: They are arranged radially and transport pipes (10a) to (10h) are connected to each of them.

According to this example device, the powder and granular material in the pressurized tank (1) can be distributed and transported to a plurality of transport pipes, regardless of the differential pressure between the pressure inside the pressurized tank and the top outlet pressure. The amount of powder to be cut out can be determined. In other words, the pressure of each F7 discharge is determined by the pressure loss of each transport pipe, so it shows a different value. On the other hand, the pressure of the pressurized tank is equal to the source pressure of the pressurized gas, so the pressure of each screw is determined by the pressure loss of each transport pipe. Although the pressure difference differs between the pressure difference and the outlet, the cutting amount can be uniformly determined by selecting and determining the rotational speed of the screw depending on the magnitude of the pressure difference. In addition, as mentioned above, lowering the rotational speed of the screw makes quantitative performance more difficult, so the screw with the highest rotational speed is designed to operate at a lower rotational speed. Once the conditions are determined, it is possible to suppress the variation in quantitativeness within a certain range.

As described above, in this embodiment, it is possible to evenly distribute powder and granules to multiple locations from one pressurized tank, and in this case, the uniform distribution performance is different from that of the conventional device, which has a variation of about 15≦. On the other hand, with the device of the present invention, it is possible to suppress the granular material within the range of ±3 to 6%, and also to suppress the quantification of powder and granules by each screw to ±3 to 6%. Since the powder and granules can be distributed and transported to multiple locations, the upper stage equipment, which requires less installation space, is inexpensive.Furthermore, fluctuations in pressure loss due to the length of the transport pipe can be adjusted by the same rotation speed of the screw, so the transport pipe length is K11l. It has excellent features such as being able to improve the degree of freedom in design without any limitations, and being able to set the cutting amount to each transport pipe separately, rather than just distributing it evenly.

It should be noted that the screws (14a) to (14h) are not limited to being installed radially, but may of course be installed in parallel.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing one embodiment of the device of the present invention, and FIG. 2 is a plan view showing another example of the device of the present invention. (1) is a pressurized tank, (6) is a pressurized pipe, (8) is a pressure equalizing pipe, Ql (10a) to (10h) are transport pipes, (14,
(14a) to (14h) are screws, ae is a drive device, 01 is a trough, a! J is the outlet. Patent Applicant Denka Engineering Co., Ltd. Procedural Amendment C Voluntary) Patent Office Chief Tomi Hibiki Shimada dated 31st May 1985 1, Indication of Case 1986 Patent Application No. 115 @ 00 No. 2 Issued TljtD Name Powder Granular high pressure wheel! ! ! Device 3. Person making the amendment (patent issued related to the incident) Address: 1-14-1-4, Arihata-cho, Chiyoda-ku, Tokyo Agent 5: Date of amendment order Voluntary 6: Increased due to the amendment Number of inventions None 7, Amendment to be made Patent Application No. 125400/1983 (1) The detailed explanation section of the first invention in the specification is amended as follows. 3. DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transport device capable of cutting out a fixed amount and directly distributing powder or granules in a pressurized tank by means of a high-pressure carrier gas. Devices for transporting powder and granular materials through transport pipes using carrier gas such as air or inert gas have become quite sophisticated through various improvements and have reached the present day, but until now the main purpose of many researchers has been to It has been aimed at transporting at a high solid-air ratio. The ultimate purpose of this is to save energy, but as the field of application of gas transportation has expanded in recent years, there has been an increasing demand for quantitative cutting of powder and granular material and simultaneous and even transportation to multiple locations in addition to the above-mentioned purposes. Ta. When performing quantitative cutting of powder or granular materials in response to requests for A method has been adopted in which quantitativeness is maintained by reducing the amount by more than 20%. However, in the case of the former, the amount of powder filled into the rotor varies somewhat depending on the amount of powder present inside the pressurized tank, ie, the amount filled into the rotor fluctuates depending on the magnitude of powder pressure. In addition, since the rotor is divided into multiple chambers, powder and granular material is intermittently supplied to the transport pipe, and the intermittent supply of powder and granular material is particularly noticeable in the range where the rotation speed of the rotor is low. . On the other hand, in the case of the latter fixed throttle, because the cross section is reduced, excessive pressure is required compared to the normal transport pressure, and the flow rate at the throttle part increases, so wear progresses and the cutting speed decreases over time. It changes gradually and is actually necessary!
! In order to obtain the wheat cutting speed, K has to change the drawing shape several times and test it, which is a hassle of trial and error. There were drawbacks. In addition, when distributing and transporting to multiple locations evenly, the current methods are to connect multiple transport pipes to -1 pressurized tanks and distribute and transport, or to use multiple pressurized tanks and connect each pressurized tank. ,1
Methods such as connecting two transport pipes have been adopted, but if a fixed throttle is provided for each distribution pipe, there are the same drawbacks as mentioned above, and methods other than fixed throttles have the same length as the transport pipe itself. Unless the pressure loss of each transport pipe is adjusted by adjusting the pressure loss of each transport pipe, it is impossible to achieve evenly distributed transport, which has the disadvantage that the transport pipe laying route is regulated. The present invention aims to provide a new apparatus for high-pressure transportation of powder and granular materials that can eliminate the various drawbacks of the conventional apparatuses described above. An embodiment of the present invention will be described below with reference to the drawings. (1) is a pressurized tank into which powder and granules are charged, and (4) d is a porous aerator whose body (8) is the bottom and forms an air chamber (5 m). (6) is a cutting device equipped with a screw that passes through the barrel (2) and extends to the top of the aerator. Pressurized gas is supplied to the transport pipe 00 from a pressurized source (not shown). At the same time, branch pipes (6) (2) K are connected to air channels (3) and valves (?) at the top of the pressurized tank (1).
Supplied via. cL1ri transport valve. Valve (7) (9) 01 r
The flow rate can be adjusted respectively. The Uri screw has a distal end exposed and extended above the aerator, and its proximal end is connected to a drive device such as a motor. (B) is a guide cylinder that covers a part of the screw, and is fixed to the tank body via the mounting branch Qη, and its tip (2) 6
It has been expanded to become an introduction guide. A discharge port @ is provided at the bottom of the proximal end side (toward) of the guide cylinder, and a pipe (2) is connected to the transport pipe (a) via a cut-off valve j.
It is connected to the. In the above device, the angle of the axis of the screw with respect to the horizontal line viewed from the tip introduction part (b) side, that is, the elevation angle is 6.
It is desirable to arrange the angle within 0° in order to maintain the quantitative property of cutting out the powder. If the screw (B) is arranged at an angle of depression, quantitative performance will be impaired due to the influence of gravity acting on the powder and granules being transferred and the influence of powder pressure, and if the angle of elevation is set in the range of 60 to 90? The sliding phenomenon of powder and granules or ri1M- increases, impairing quantitative performance.Next, the operation of the apparatus of the present invention described above will be explained.First, the gas discharge valve (2) is opened to reduce the pressure inside the pressurized tank (1). With the pressure at normal pressure, open the input valve (2) to fill the tank with powder and granules. Close the powder and granule filling ridge input valve (2) and discharge valve (3), and close the pressure valve (n and equalization valve). Open the pressure valve (9) and increase the pressure of the pressurized tank (1) to 2 to 4/cIII・0 or higher.Almost at the same time as the tank pressure increase ridge transport valve (b) and cut-off valve j are opened, the pressure is increased by the drive device fl (to). The screw α◆ is driven to rotate. Through this operation, the powder and granules fluidized on the fluidized bed (4) in the pressurized tank (1) are introduced into the screw as the screw rotates. It is continuously transferred from part (2) through the inside of the guide tube α, and is supplied from the discharge port (6) through the cut-off valve ω into the transport pipe (A). The pressure is approximately the same as the inside.The quantitative property of powder and granular material is determined by the gas flow rate supplied from the pressurizing pipe (6), the blade shape and rotation speed of the screw (b), and the shape of the screw (b). Quantitativeness is determined by the rotational speed of the screw and the amount of gas supplied to the pressurizing tube (6).As a result of the experiment, the quantitativeness is better when the screw rotational speed is low compared to when the screw is rotating at high speed. As described above, according to the device of the present invention, the powder and granules in the pressurized tank are continuously cut out by the screw and supplied to the transport pipe, which improves the cutting precision of the powder and granules. 1. For example, while the conventional apparatus has a quantitative accuracy of about ±15%, the apparatus of the present invention can reduce the quantitative accuracy to ±3 to 6%. Since the flow of the body does not become intermittent, it is particularly suitable when the transport end is equipment that continuously uses or reacts powder or granular materials. Furthermore, by appropriately selecting the shape of the screw blades, various types of It is possible to transport powder and granules.Furthermore, in a pressurized tank, only pressurized gas passes through, and the powder and granules are not supplied to the transport pipe, which is the so-called blow-out, which causes a phenomenon. It has been confirmed that the device is optimal as a device. In the present invention, a direct dispensing and transporting device is provided by arranging a plurality of cutting devices in a common tank. Figure 2 is a plan view of the main part of the distributing and transporting device In the figure, a pressurized tank (1) K has a plurality of screws (141) to (14h) arranged radially, each of which has a transport pipe (10m) to (10k).
) are connected. According to this scissors, there is an advantage that the amount of powder or granular material to be cut out can be adjusted regardless of the differential pressure between the pressure inside the pressurized tank and the pressure at the trough outlet. In other words, the pressure at the outlet of each guide cylinder is determined by the pressure loss of each transport pipe, so it shows a different value.On the other hand, since the pressure in the pressurized tank is constant, there is a pressure difference between each screw port and its outlet. Therefore, the amount of powder discharged also differs in this f-, but the amount of cut-out can be made equal by adjusting the rotational speed of the screw according to the magnitude of each pressure difference. In this case, as mentioned above, the quantification is better when the screw rotation speed is low, so the screw with the highest rotation speed is used as a reference, and the other screws are designed to operate at lower rotation speeds. If the number of row bees is determined, the quantitativeness can be kept within a certain range. According to the above device, it is possible to equally distribute or adjust the distribution of powder and granules to multiple locations from one pressurized tank, and in this case, the quantitative quality of the powder and granules can be kept within ±S to 6C. . Moreover, since powder and granules can be distributed and transported from one pressurized tank to multiple locations, the installation area is small and equipment costs are low.Furthermore, fluctuations in pressure loss due to the length of each transport pipe can be controlled by the number of revolutions of the screw. Since it can be adjusted, there is no limit to the length of the transport pipe, increasing the degree of freedom in design. Moreover, it is not limited to equal distribution, and it is also possible to set the amount of cutout to each transport pipe separately. It should be noted that the screws (14-) to (14h) are not limited to being installed radially, but may be installed in parallel on one side. (2) Among the drawings, Figure 1 will be amended as attached. that's all

Claims (3)

[Claims] (1) In a powder and granule high-pressure transport device i that fills a powder or granule in a force U pressure tank and transports the powder or granule by a carrier gas at a pressure of 2 kg/g or more, the granule is driven by a drive device. Extending the screw from the outside into the pressurized tank, covering the exposed part of the screw outside the pressurizing tank with a trough forming a discharge port, and connecting the discharge port to a transport pipe supplied with carrier gas. A high-pressure transportation device for powder and granular material, characterized in that a carrier gas is supplied to the pressurized tank. (2) In a high-pressure powder transport device that fills a pressurized tank with powder and transports the powder and granule with a carrier gas at a pressure of 2 KIi/cg -G or more, a plurality of The screws are extended from the outside into the pressurized tank, and the exposed portion of each screw outside the pressurized tank is connected to a trough forming a discharge port, and the discharge port is connected to a plurality of transport pipes to which carrier gas is supplied. A high-pressure transportation device for powder and granular material, characterized in that the powder and granular material is distributed and transported by being connected to a separate IIC and supplying a carrier gas to the pressurized tank. (3) The powder and granular material high-pressure transport device according to claim 1 or 2, wherein the elevation angle in the axial direction of the screw is selected in the range of θ to 60.