JPS5822216A - Conveying device for high pressure gas containing pulverous material - Google Patents

Abstract

PURPOSE:To perform high pressure conveyance with a mixing ratio controlled so as to meet the desired value, by mixing powder and grain bodies from a pressure tank at the outlet port and at the same time controlling the takeout volume of powder and grain bodies hydrodynamically by means of a controller for takeout operation. CONSTITUTION:Pressure regulating valves 7A and 7B of each pressure tank and conveying valves 12A and 12B are both closed and in a state of normal pressure in the tank, injection valves 2A and 2B are opened, charging different kinds of powder and grain bodies to be mixed into pressure tanks 1A and 1B respectively. Next, the pressure regulating valves 7A and 7B are opened and, after raising pressure in the pressure tank up to the required value, the conveying valves 12A and 12B are opened, while flow regulating valves 17A and 17B are opened whereby fluidized powder and grain bodies are taken out via discharging nozzles 11A and 11B by dint of compressed gas fed from pressure lines 6A and 6B and mixed at a confluent point of these nozzles, thus they are conveyed through a conveying tube 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-pressure gas transport device for mixing powder and granules that transports different types of powder and granules at a required mixing ratio.

Conventionally, when transporting a mixture of different types of powder and granules, the different types of powder and granules are placed in a mixer in advance with a lid according to the mixing ratio, and after stirring and mixing, the mixed powder and granules are supplied to a pressurizing tank and high pressure is applied. It is common to transport This method requires a mixer in addition to a high-pressure transport device, which increases the size of the entire device, and the mixing ratio in the mixer is determined by the amount of powder and granules input, so the mixing ratio is changed during mixing. The present invention is a novel method for high-pressure gas transportation of powder and granular materials that can overcome the drawbacks of the conventional devices described above. This equipment is characterized by filling powder and granular materials of different polarities into separate pressurized tanks, mixing the powder and granular materials from these pressurized tanks at the outlet, and also By hydrodynamically controlling the amount of granular material cut out of the tank by a control device for cutting operation, high-pressure transport is carried out while controlling the mixing ratio to a desired value.

To explain the embodiment of the device of the present invention with respect to the above one aspect, (
IA) (IB) are respectively injecting valves (2A
) (2B) is a pressurized tank filled through the tank.

A fluidized bed (3 people) (3B) is formed below it.

(5) Pressurized gas supply source such as air or inert gas (-(6
B) is a pressurization line that supplies pressurized gas from the supply source (5) to the fluidized bed (3A) (3B) of the pressurized tank (IB), and these pressurization lines' (6A ) (6B) are equipped with pressure regulating valves (7A) (7B), and the pressure regulating valves (7A) (7B) are connected to the fluidized bed (3mm) (3B) (li
The pressure inside the pressurized tank is controlled at a fixed value to the required value by operating the detection output of the pressure detector (8A) (, 8B) that detects the pressure at position t and the output of the pressure regulator (9 people) (9B) supplied with it. be done.

(IIA) (IIB) One end is a pressurized tank (1 person) (I
B) A discharge nozzle extending into the fluidized bed (3A) (3B), the other end of which is fully closed during non-transportation and fully open during transport (12 persons) (12B) ) are connected to each other and communicated with the transport pipe (13).

(15A) (15B) are pressurized gas supply source (5) and discharge nozzle (IIA) (IIB) transport valve (12 m) (12
B) a booster line connected between the secondary sides of the
Flow rate detector (16&) (16B) and flow rate control valve (17
A) (17B) is installed, and a flow rate detector (16A) (1
6B) is supplied to the flow rate controllers (18A) and (18B), and the outputs of these controllers control the flow rate control valve (17).
A) (17B) is operated and the booster gas flow is controlled, thereby controlling the amount of powder material cut out through the discharge nozzles (IIA) (IIB). That is, by increasing the booster gas flow rate, the amount of powder material cut out is reduced,
Conversely, by decreasing it, the amount of powder or granule material cut out is increased, and the amount of powder or granule material cut out is hydrodynamically controlled.

(20A) (20B) are discharge nozzles (IIA) (II
B) is a differential pressure detector for detecting the pressure loss of the discharge nozzle (11A) (II) based on the output of these differential pressure detectors.
The mass flow rate of the powder passing through B) is measured. In other words, the pressure loss ΔP of the discharge nozzle is ΔP=ΔPa+KmQ ・・・・・・・・・・・・
...It is expressed as (1), where ΔPa is the pressure loss due to only the pressurized gas when the powder is zero, m is the solid-gas ratio of the powder and the pressurized gas, and Q is the pressure The gas flow rate, K, is a proportionality constant. Also, the quality t and weight W of the powder or granular material is expressed as W = m
Ps) /K・・・・・・・・・・・・・・・
- (3), and in this equation, the value of the pressure loss ΔPa of the pressurized gas at the discharge nozzle is so small that it can be ignored, so in the end, equation (3) becomes ΔP for Wζ.

Therefore, by multiplying the output of the differential pressure detector (20A) (20B) by the pre-calculated 9 proportionality constant K in the mass flow calculator (21A) (21B), the discharge nozzle (IIA) is
(IIB) It is possible to measure the mass flow rate of only the passing powder and granular material, and by controlling the booster flow rate controllers (18A) and (18B) in cascade based on the outputs of these calculators, the powder and granular material flow rate can be set to the desired value. can be reliably controlled.

Next, to explain the operation of the device of the present invention, first, the pressure control valves (7A) (7B) and the transport valve (12A) of each pressurized tank
(12B) is closed to bring the pressure inside the tank to normal pressure, then open the injection valves (2A) (2B) and pressurized tanks (IA) (IB).
) are filled with 8A types of powder and granular materials to be mixed.Next, open the pressure FA mode (7A) (7B) and adjust the pressure inside the pressurized tank frl! After the external pressure reaches the value, transfer valve (12A) (12
B) and flow control valves (17A) (17B), the powder fluidized by the pressurized gas supplied from the pressure lines (6A) (6B) is discharged through the discharge nozzles (IIA) (IIB). ), mixed at the confluence of the nozzles, and transported through the transport pipe (to). At this time, the mixing ratio of powder and granules is booster line (15A) (15B)
No style 1liIi! The desired value is set by setting the set value of the pointers (18A) (18B) to a desired value and controlling the amount of powder material cut out from each pressurized tank. When changing the mixing ratio, the set values of the flow rate controllers (18A) (18B) may be changed.

In addition, the flow rate of the powder and granular material passing through the discharge nozzles (IIA) (IIB) is measured by the computing units (21A) (21B), and the flow rate and the cylinder needles (18A) (18B) are controlled in cascade based on the measured output. Ru.

As described above, according to the apparatus of the present invention, the number of pressurized tanks corresponding to the number of powders and granules to be mixed is provided and the amount of the powders and granules cut out is controlled. It has the excellent characteristics of being able to mix and transport under high pressure, as well as being able to easily and arbitrarily change the mixing ratio, thereby ensuring reliable mixed transport.

The pressure loss of the main discharge nozzle is detected, the mass flow rate of the powder passing through the discharge nozzle is measured, and the amount of powder cut out is controlled based on the measured value, based on the actual flow rate of the powder and granule. Since the mixing ratio is controlled, the mixed powder and granular material can be transported at an accurate mixing ratio.

In addition, although the case where two types of powder and granules are mixed is explained above, it is possible to mix and transport 38 or more powders and granules by adding a pressurized tank, and when mixing powder and granules together. It is also possible to transport a mixture of powder and liquid.

In addition, pressurized gas is supplied to each pressurized tank (IA) (IB)-'S through a pressure control valve (7) common to both, as shown in Figure 2.
Even if a pressure adjustment gauge 9) is installed, it will not be possible.

Furthermore, instead of controlling the amount of powder material cut out by controlling the flow rate of the booster line, as shown in Fig. The cutting amount may be controlled by adjusting the IAR1] meters (9A) (9B).

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing one embodiment of the device of the present invention, and FIGS. 2 and 3 are system diagrams showing other examples of the device of the present invention, respectively. (IA) (IB) are pressurized tanks, (3A) (3B) are fluidized beds, (6A) (6B) are pressurized lines, (7) (7A
) (7B) is the pressure control valve, (11 people) (IIB) is the discharge nozzle, (2) is the transport pipe, (15A) (15B) is the booster line, (17A) (17B) is the flow control valve, (
20A) (20B) is a differential pressure detector, (21A) (2
1B) is a mass flow rate calculator.

Claims (2)

[Claims] (1) A plurality of fluidized bed pressurized tanks filled with different types of powder and granular materials, pressurized gas supply equipment that supplies pressurized gas to the pressurized tanks, and powder and granular materials in the pressurized tanks. and a cutting operation control device that controls the amount of powder and granular material cut out by the discharge nozzle, and the discharge nozzles are connected to each other and each of the cutting operation control devices is operated. 1. A high-pressure gas transport device for mixing powder and granules, which mixes and transports different types of powder and granules at a required mixing ratio by controlling the amount of powder and granules cut out from each pressurized tank. (2) The device according to claim 1, wherein the pressure loss of the discharge nozzle is detected to measure the particle size, and the cutting operation control device is controlled based on the measured value.