JPS59222222A - Apparatus for discharging quantitatively slurry - Google Patents

Abstract

PURPOSE:To discharge quantitatively a high-concn. slurry from a high-pressure reactor, etc. by connecting a quantitative vessel to a high-pressure vessel, accumulating the slurry in the vessel in the first place, and then discharging. CONSTITUTION:The slurry is introduced into a quantitative vessel 4 through an introducing pipe 11 having an introducing valve 1. After the quantitative vessel 4 is filled with the slurry, the introducing valve 1 is closed and a discharge valve 2 provided to a discharge pipe 12 is opened to discharge the slurry. After the discharge valve 2 is opened, a gas valve 3 of an introducing pipe 13 for introducing a compressed gas is opened. The remaining slurry is completely discharged by sending the compressed gas.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for discharging a constant amount of slurry, the purpose of which is to
The objective is to quantitatively discharge high-concentration slurry from a high-pressure reactor or the like. Highly concentrated slurry has unstable flow characteristics due to fluctuations in water content, compressibility, etc., so it is extremely difficult to determine the discharge amount by adjusting the valve opening.
In particular, when discharging slurry from high-pressure equipment, it is necessary to reduce the opening of the valve.
In fact, quantitative discharge is impossible. Conventionally, slurry is discharged by periodically opening and closing a ball valve with a large opening area in units of a fraction of a second, and the amount of discharge is adjusted by the ratio of the opening time to the closing time. However, the discharge amount is unstable because it is affected by the properties of the slurry.

In the present invention, a metering container is connected to a high-pressure container, and slurry is stored therein and then discharged. Therefore, the amount discharged at one time is determined by the volume of this metering container, and is not affected by the properties of the slurry. The amount discharged in one operation is constant. By controlling the introduction and discharge of the slurry into the metering container, the slurry can be discharged continuously, and the amount of discharge can be adjusted by changing the volume of the metering container and the period of introduction and discharge.

An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, slurry enters a metering container 4 through an inlet pipe 11 having an inlet valve 1. In FIG. When the metering container 4 is filled with slurry, the introduction valve is closed, and the discharge valve 2 provided in the discharge pipe 12 is opened and the slurry is discharged. Here, since the pressure in the metering container decreases after the discharge valve 2 is opened, the slurry is not sufficiently discharged. The gas valve 3 is opened, compressed gas is sent, the residual slurry is completely discharged, and all the valves are closed to complete the 1 cycle.

Figure 2 shows the timing of opening and closing each time, with blank spaces indicating opening and closing times.
Diagonal lines are closed. First, the introduction valve opens, and after the slurry enters, the introduction valve closes, and then the discharge valve 2 opens to discharge the slurry. During this time, the gas valve 3 is opened and compressed gas, for example compressed air, is blown in to completely discharge the residual slurry, the gas valve 3 is closed, and then the discharge valve 2 is closed. This cycle is repeated to continuously discharge the slurry.

Figure 3 shows a slurry quantitative discharge device in which a cooler 5 is attached to a quantitative container 4. By lowering the temperature of the quantitative container,
This is to lower the pressure and ensure the introduction of slurry from the high-pressure container, and is effective when the temperature of the slurry is high and the opening/closing cycle is short.

FIG. 4 shows a gas discharge pipe 16 having a pressure reducing valve 6 in a metering container 4.
This is a slurry metering discharge device with several steps, which completely introduces the slurry by lowering the pressure inside the metering container. This is effective when the slurry discharge pressure is low. Figure 5 shows the timing of opening and closing each time in this case.The pressure reducing valve is opened and closed between the time when the discharge valve 2 in the case of Figure 2 is closed and the next time when the inlet valve 1 is opened. Reduce the pressure, open the introduction valve, and introduce the slurry. As a result, the metering container 4 can be completely filled with slurry without creating any voids, and the amount to be discharged can be accurate.

Next, Table 1 shows the relationship between the discharge amount, the quantitative container, and the time of one cycle.

−3= Table-1 This relationship can be expressed as equation 1.

3600χ y=□...(1) where y is the discharge amount (Q/hr) χ is the volume of the quantitative container (Ill) t is the time of one cycle (sec) As described above, according to the present invention, For example, it becomes possible to reliably discharge high-concentration slurry quantitatively from a high-pressure container, which has been difficult in the past, and its practical value is extremely large.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of a slurry quantitative discharge device. Second
The figure is an explanatory diagram showing the timing of opening and closing of the introduction valve, the discharge valve, and the gas valve. FIG. 3 shows an embodiment of a quantitative discharge device for digit slurry with a cooler installed. Fig. 4 shows an embodiment of a slurry quantitative discharge device equipped with a pressure reducing port, and Fig. 5 shows the inlet valve, discharge valve, gas valve, and
It is an explanatory diagram showing timing of opening and closing of a pressure reducing valve. ■...Introduction valve, 2...Discharge valve, 3...Gas valve, 4
... Metering container, 5... Cooler, 6... Pressure reducing valve. Figure 3 Figure 4

Claims (2)

[Claims] (1) Consists of a metering container equipped with a valve material introduction pipe for slurry introduction, a recirculating discharge pipe for slurry discharge, and a valve material gas introduction pipe for introducing compressed gas, and the valve material introduction pipe and the recirculating A slurry metering discharge device characterized in that discharge pipes are located at both ends of a metering container. (2) A valve material introduction pipe for introducing slurry, a round discharge pipe for discharging slurry, and a valve material gas introduction pipe for introducing compressed gas,
Consists of a quantitative container equipped with a gas discharge pipe with a valve for pressure reduction.
A device for quantitatively discharging slurry, characterized in that the valve material introduction pipe and the circulating discharge pipe are respectively located at both ends of a quantitative container.