JPS5874422A - Charging method of granule into pressurized tank - Google Patents

Abstract

PURPOSE:To smoothly perform charging of granules by temporarily opening a part in the vicinity of a bottom part of a supply tank to the atmosphere, when the charge of the granules into a transport pressurized tank from the supply pressurized tank is started, preventing compressive solidification of the fluidized granules. CONSTITUTION:If a residualant, of granules in a pressurized tank 8 for transportation is decreased to below a preset value, a charging valve 10 is opened on the basis of output of a quantity measuring device 21, and the granules are charged to the tank 8 from a pressurized supply tank 2. Simultaneously, a control valve 25 is opened, and the granules in the vicinity of a discharge port 9 are fluidized by a purge effect of pressurized gas. Then when the charge of the granules is started, a control valve 23 is opened, and the granules, charged to the pressurized tank 8, is partially fed back to a top of the pressurized tank 2 through a circulation piping 24 together with pressurized gas.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides a method for charging powder and granular material into a 1-pressure tank, firstly, a tank for supplying powder and granular material is connected in series via a charging valve to the upper part of a pressurized tank for transporting powder and granular material. This invention relates to a method for charging powder and granular material into a pressurized tank for transporting powder and granular material, in which the powder and granular material in a powder and granular material supply tank is charged into a pressurized tank for transporting powder and granular material via a charging valve during the transportation of the powder and granular material. .

This type of powder and granule loading method is applied when powder and granules are continuously transported from one powder and granule transportation tank. Powder Remaining 1: When the powder or granule remains is less than the required value, the powder or granule is not transported, but the powder or granule is charged from the powder supply tank in an amount greater than the transport amount, and the powder or granule in the transportation tank is removed. Continuous transport of powder and granular material is carried out by increasing the amount of filling.

However, the pressurized transportation tank is constantly pressurized and maintained at a high pressure while the powder is being transported, so if the supply pressurized tank is at normal pressure, the powder cannot be loaded. Therefore, when charging, it is necessary to maintain the internal pressure of the supply pressurized tank at the same pressure as that of the transport tank.

However, simply keeping the pressure tanks for transportation and supply at the same pressure may cause the powder and granules to be compressed and solidified at the input port of the supply tank, making it impossible to charge the powder and granules.
Further, there is a drawback that a bridging phenomenon occurs in the supply tank other than the input port, preventing the powder from falling.

The present invention aims to propose a new method for charging powder and granules into a pressurized tank that can eliminate the drawbacks of the conventional devices described above. At the beginning of charging the powder and granules into the pressurized tank, the vicinity of the lower input port of the powder and granule supply tank is temporarily opened to the atmosphere. A part of the solid-gas mixed fluid in the storage tank is circulated through an external passage.

Embodiments of the method of the present invention will be described below with reference to the drawings.

In Fig. 1, (1) is a service 1 tank that stores powder and granular material □, and (2) is a supply source valve (4), a supply valve (5), and a supply valve (5) connected to the lower input port (3) of the tank (1). An aerator (7) and a discharge part (9) are connected to the lower part by ascending the flexible pipe (6).
A pressurized tank for supplying powder and granular material (8) is a pressurized tank for transporting powder and granular material connected to the pressurized tank (2) via an input valve (7) and a flexible pipe 0→.

A fluidized bed 01 to which pressurized gas such as air or inert gas is supplied via a supply pipe (6) is arranged at the bottom of the pressurized tank (8) for transporting powder and granular materials. A plurality of transport pipes 0→ are arranged close to each other from above and extending outward.

A pressure regulating valve a0 is interposed in the pressurized gas supply pipe (6),
This control valve a0 is pressurized by the pressure m1M, which is supplied with the detection output of the pressure detector 0η disposed in the gas chamber (below the gas chamber) in the fluidized bed (I) of the pressurized tank (8). The pressure inside the tank (8) is controlled to a constant value.

In addition, 01 is fully open during transportation, which is installed in α4) before each transportation.
The transportation valve is fully closed when not being transported, and (e) is controlled by load cells, etc. installed in the pressurized tanks (2) and (8), respectively. hot water. 4. -/7 (
2) A control valve that controls the aeration gas being supplied to the O aerator (7).

Between the tops of the pressurized tanks (2) and (8), an ambient air mixed fluid circulation pipe (c) with a control valve @ is provided, and a discharge part (9) of the supply pressurized tank (2) is installed. ) has a control valve (c)
An atmosphere dissipation pipe @ with an intervening pipe is connected. Further, the top of the pressurized supply tank (2) is connected to the atmospheric dissipation pipe via the pressure regulating valve (1) and the control valve (1), and via the control valve (2), respectively. The pressure regulating valve is connected to the tank (
2) is supplied to the tank (8) at the time of charging the powder and granules, and is operated accordingly.

Next, a method of the present invention using the above-mentioned apparatus will be explained.

First, service tank (1), sword pressure tank (2) (
8) are respectively filled with powder and granular materials, and the input valve (4), input valve (5) (M), transport valve α1 and control valve @eA@@)e
Assuming that A is all closed, from this state, pressurized gas is supplied to the pressurized tank (8) for transportation through the pressurized gas supply pipe (2) to increase the pressure inside this tank (8) to the required value. Then, by opening the transport valve a, the powder and granules in the pressurized transport tank (8) are transferred to the transport pipe (14) together with the pressurized gas.
1 to be transported to the destination. During this time, the pressure in the transportation pressurized tank (8) is controlled to a fixed value at a required pressure by operating the pressure control valve αi according to the control output of the pressure regulator θ.

When the remaining amount of powder or granular material in the pressurized transportation tank (8) becomes less than the set value, the pressure in the pressurized tank (2) is
) and (8) are equalized, the supply of powder and granules from the supply pressurized tank (2) to the transport pressurized tank (8) is started.

That is, at the start time t and s of the input, first the input valve (a) is switched to the second position.
At the same time, the control valve (E) is opened as shown in Figure 2B, and the control valve (E) is opened as shown in Figure 2E. Circuit 0 is switched and the pressure regulating valve 0 frame becomes uncontrolled as shown in Figure 2F, its opening is maintained at the required opening, and the pressure regulating valve adjusts the pressure curve needle The output is controlled as shown in FIG. 2G.

Therefore, when the control valve (c) is temporarily opened, the powder near the discharge part (9) is fluidized by the purge effect of the pressure gas. Thereafter, the control valve (c) is closed, and the control valve (a) is intermittently opened at required intervals as shown in Figure 2. Is that dfa in the tank (8)? The input amount is greater than t. When the introduction of powder and granular material starts, time 1. Then, the control valve is opened as shown in the second diagram, and a part of the powder and granules put into the pressurized transport tank (8) is transferred together with the pressurized gas to the supply pressurized tank through the circulation pipe (c). (
It is returned to the top of 2).

Therefore, while the powder is being introduced, the pressure control valve (c) is set to the pressure control meter (
Since the pressure in the supply pressurized tank (2) and the transport pressurized tank (8) are equalized, the integrated chamber (to) of the transport pressurized tank (8) is operated by the adjustment output of the ) is maintained at the required value.

After that, when the remaining amount of powder and granular material in the pressurized supply tank (2) becomes less than the set value, this is detected by the measuring instrument, and at this point te, the input valve (A) and the control valve (A) are closed. At the same time, the switching circuit 01) is switched, and the pressure regulating valve αυ is again controlled by the regulating output of the pressure regulator (to), returning to the initial state.

In this state, the control valve (a) is opened to bring the internal pressure of the supply pressurized tank (2) to atmospheric pressure, and at the same time the input source valve (a) is opened.
4) and the input valve (5) are opened, and the powder and granular material in the service tank (1) is filled into the pressurized supply tank (2). After filling is completed, the input valve (4), input valve (5), and control valve are closed. These operations are repeated every time the remaining amount of powder and granule in the pressurized transport tank (8) becomes less than the set value, and the powder and granules are transferred from the pressurized transport tank (8) to each transport pipe (
(b)).

As described above, according to the present invention, when granular material is charged from the supply pressurized tank into the transportation pressurized tank, the granular material near the outlet of the supply □ pressurized tank is first fluidized. Even if the powder at this position is compressed and solidified by the weight of the powder above it, it will be easily fluidized and will not become an obstacle to loading the powder. This has advantages such as being able to eliminate the bridging phenomenon of powder and granules in the supply pressurized tank because a mixed fluid of a part of the input powder and granules and the pressurized gas in the pressurized transportation tank is circulated through the circulation path. It has an additional effect.

In the above, the case where the pressurized transport tank (8) is configured to distribute and transport the powder particles to a plurality of transport pipes Q4 has been explained, but a blow tank type in which there is only one transport pipe Q4) is explained. The method of the present invention can be applied even if the pressurized transport tank (8) is a cellar pump type.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing a transportation device applicable to implementing the method of the present invention, and FIG. 2 is a sequence chart showing its operation. (2)... Pressurized tank for supplying powder and granular materials, (8)... Pressurized tank for transporting powder and granular materials, (9)... Discharge section, (g).
...Inlet valve, (c)...Circulation piping, Kanji...Gas dissipation piping. Applicant Kawasaki Steel Co., Ltd. Denka Engineering Co., Ltd. Continued on page 10 Inventor Shuzo Fujii 1-4-1 Yurakucho, Chiyoda-ku, Tokyo Denka Engineering Co., Ltd. Inventor Kei Achiha Chiyoda-ku, Tokyo 1-4-1 Yurakucho, Denka Engineering Co., Ltd., 0 Inventors: Hideo Oishi, 1-4-1, Yurakucho, Chiyoda-ku, Tokyo, Japan 0 Inventors, Hajio Yanagihara, 1-4, Yurakucho, Chiyoda-ku, Tokyo No. 1 Denka Engineering Co., Ltd. @l! #J t :, : : Ichisho, Yu, 1.4-1 Denka Engineering ■ Applicant Denka Engineering Co., Ltd. 1-4-1 Yurakucho, Chiyoda-ku, Tokyo ( :,,. Procedural amendment (voluntary) ) December 8, 1981 1, Indication of the case 1981 Patent Application No. 171718 2, Name of the invention Method of charging powder and granules into a pressurized tank 3, Person making the amendment Relationship with the case Patent applicant Address: 1-28 Kitahonmachi-dori, Chuo-ku, Kobe, Hyogo Prefecture
Name Kawasaki Steel Co., Ltd. Representative Eibe Iwamura Address 1-4-1, Yurakucho, Chiyoda-ku, Tokyo Name
Denka Engineering Co., Ltd. Representative Ai
Ko Iso 6, Number of inventions increased by amendment Schiff, Detailed explanation of the invention and drawings in the specification subject to amendment. 8. Contents of the amendment As shown in the attached sheet, Amendment Application 1971-171718 (1) On page 2 of the specification, line 5, "this yuzu" is amended to read "this species." (2) Among the drawings, Figure 1 will be amended as attached. that's all

Claims (1)

[Claims] A powder supply tank is connected in series to the upper part of the pressurized tank for transporting powder and granules through an input valve, and the powder and granules in the powder supply tank are connected to the pressurized tank for transporting powder and granules. In a method for charging powder and granular material into a pressurized tank in which powder and granular material are introduced into a pressurized tank through a charging valve, when starting to charge the powder and granular material from the powder and granular material supply tank to the pressure tank for transporting powder and granular material, the powder and granular material supply tank The vicinity of the lower input port of the granular material is temporarily opened to the atmosphere, and a part of the solid-gas mixed fluid in the pressurized tank for transporting the granular material and the tank for supplying the granular material is circulated through an external passage while the granular material is being introduced. A method for introducing powder and granular material into a pressurized tank.