JPS62501410A - Method and device for transferring solid particles - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Title of the invention: Method and device for transferring solid particles Background of the invention 1) Field of invention The present invention relates to a method and apparatus for transferring solid particles from a low pressure point to a high pressure point. It is something.

2) Conventional technology A conventional common method of transferring solids from low pressure to high pressure uses a locked hopper.

In a working cycle, a low-pressure hopper is filled with solids, and then, by gravity, a high-pressure Isolate and pressurize the solids to the required high pressure before discharging them into a storage container. Ru. After complete discharge, the hopper is depressurized for starting the next cycle. one Generally, two hoppers are used, one for filling and one for discharging.

Other known methods for transferring solids to high pressure points use solids mechanical pumps. and using a slurry pump after converting the solids into slurry. . In the former case there is a significant problem due to seal corrosion and in the other case slurry formation Adding liquid to do so is an unacceptable problem in practical situations.

The idea for supplying solids from low pressure by using a series of standpipes was published in 1982. Magazine "Transport Pipe 2", pages 187 to 197 of the middle cylinder It is described in "Current situation and future applications of standpipe running water" by Lunis Lenguet. supply material The solids in the storage are passed through a series of streams operating at increasing pressures until the final stroke operating pressure is reached. It is fed through the mobilization bed, standpipes, mechanical slide valves and risers.

This equipment is extremely unstable to operate and requires transfers to control the operation at each standpipe. Fluidized bed as a feeder for each standpipe, relying on mechanical sliding valves with moving members It's difficult to handle.

Summary of the invention The object of the invention is to transfer particulate solids continuously and permanently to high pressure in an apparatus without moving parts. The object of the present invention is to provide a method for transporting solid particles to be transported.

Another object of the invention is to provide a range of solids flow rates and a range of different pressures (e.g. zero). Provides a solids feeder that can be operated from flow to maximum flow It is in.

In a first embodiment, the present invention provides solid particles from a first point at constant pressure to a second point at high pressure. There is a method to transfer children, and the method is a) at least one pair of standpipes and risers; b) a constant pressure gas flow through the inlet; Supply gas to the bottom of the standpipe and high pressure gas to the lower end of the riser through the inlet. death, C) feeding the solid particles into the top of the standpipe, and d) allowing the solid particles to flow down the standpipe. Solid particles are fluidized in a standpipe so that e) riser from the lower end of the standpipe through a valve mechanism connecting the standpipe and riser to each other; Transfer the solid particles to the bottom edge of f) solid particles are driven upwards in the riser by the upward flow of gas; let It consists of processes.

The solids are fed from the riser to a second pair of standpipes and to the standpipe of the riser, as described above. The process is repeated.

In step (d), the flow is counter to the flow of fluidizing gas downward in the standpipe. .

In a second embodiment, the invention provides a method for moving a solid from a first point at constant pressure to a second point at high pressure. in a device for transferring particles, the device at least one pair of standpipes and a riser; A feeding mechanism that fluidizes solid particles in the standpipe and solidifies them toward the bottom of the standpipe. A constant pressure gas source that supplies gas to the standpipe so that the body particles can flow a gas inlet at the lower end of the standpipe connected to the a valve mechanism for transferring solid particles from the lower end of the standpipe to the lower end of the riser; Gas is flowed upwards in the riser to force the solid particles to travel upwards in the riser. a gas inlet at the lower end of the riser connected to a source of high pressure gas to be moved; It consists of

The valve mechanism is a V sub-valve, an L sub-valve, a J sub-valve or other non-mechanical valves. However, the sliding valve Mechanical valves can be used.

The first standpipe carries solid particles from a bulk hopper connected to the upper end of the standpipe by a riser. is supplied. The pressure in the standpipe and riser is regulated by an automatic pressure controller. .

The gas outlet at the top of the standpipe and riser is closed to form a substantial seal. (i.e. lower pressure) standpipe and riser gas inlet. Ru.

BEST MODE FOR CARRYING OUT THE INVENTION 1, the solids feeder 10 has a number of adjacent standpipes 11, 12, 13 and a lower end. are connected to the valve mechanisms 17, 18 (see FIGS. 3 and 4) at the upper end. the lifter 14, which is connected to the transfer heads 19, 20, 21 (see Figure 2); 15 and 16. The normal operation of the feeding device 10 will now be described.

Solids in the open bulk feed hopper 22 at atmospheric pressure are metered through a valve 23; It is conveyed to the lower end of the riser 14 by an air conveyor 24 with a gas inlet 25.

High pressure gas is supplied to the inlet 26 at the lower end of the riser 14 to move the solids along the riser. and convey it to the transfer head 19.

2, the transfer head 19 has a closed tubular body 27 with an inclined bottom wall 28 and a gas outlet. It has a horizontal upper wall 29 with an opening 30. The solids and gases from the riser 14 are It enters a separation tube 31 having an outlet 32 directed downward. Inertia and gravity move solids discharge toward the bottom wall of the transfer head 19 and pass through the transfer tube 33 to the adjacent standpipe 11. (The chintz arrow indicates the solid flow) toward the top.

Fine solids may remain entrained in the gas (the gas flow is shown by the dashed line). Therefore, the gas enters the cyclone 34, which separates the solids and exits the outlet pipe. 35 to direct the solids to the bottom wall 28 of the transfer head and through the transfer tube 33 to the standpipe 1. Send to 1.

The solids in the standpipe 11 (i') are lowered by the metering gas flow through the inlet 36 (see Figure 3). Fluidized from the edge. The solid head within the standpipe 11 causes the flow to flow down the standpipe 11. The solids flow is countercurrent to the gas flow fluidizing the solids above the standpipe 11.

At the lower end of the standpipe 11, the solids are removed by a valve mechanism 17 (see Figures 3 and 4). and then transferred to the second riser pipe 15.

Valve mechanism 17 connects its port 38 to standpipe 11 and its outlet 39 to transfer pipe 40. It has a connected sub-valve 37. ■ Vice Ben was released in 1980 in the United States and New York. -Published by Plennan Publishers, York, by J.R. Brace and J.A. M Matsu 1 - Jiei in "Fluidization" of Yang's collection, pages 485 to 492 "Air-controlled multi-stage system" written by L. Riu, X.G. Ri and M. Nis. Fluidized Bed" non-mechanical valves (other types of non-mechanical valves, e.g. The sub valve and the J sub valve also have high pressure gas supplied to the population 41 at the lower end of the transfer pipe 40 according to the present invention. The solids are entrained in the gas and passed through the transfer head 20 at the upper end of the riser 15. and flows upwardly through riser 15 for transfer to the next standpipe 12.

The solids pass down standpipe 12, up riser 16 and up standpipe 13. are distributed in order downward. At the lower end of the standpipe 13, the solid is The solid in the container 42 flows through the container 42 at the desired high pressure. The body is metered through isolation valve 44 and discharged to reactor 43.

The pressure at the upper ends of the standpipes 11-13 is controlled by a valve 45 provided at the gas outlet 46 of the standpipe. The pressure in the riser 42 is controlled by a valve 48, which is controlled by a valve 45. An automatic controller (not shown) may be provided.

Gas outlets 46 and 30 of standpipe 13 and riser 16 are at low pressure due to the provision of closure devices. can be connected to the inlets 36 and 41 of the standpipe 12 and riser 15, which are A similar configuration can be provided between the standpipes 12 and 11 and the risers 15 and 14. Ru.

The density of the solid in each standpipe 11-13 is determined by the head of the solid in each standpipe. For valves that are close to those that can obtain maximum pressure with minimum fluidization in the standpipe. controlled by This results in a gas flow flowing through inlet 36 into each of standpipes 11-13. by controlling the volume and using a number of different pressure regulators 47 (see Figure 1). achieved. The difference in pressure between short sections of standpipe 13 is measured by controller 49. The degree of change in pressure can be tolerated by venting a small amount of gas through the control valve 50. automatically controlled to a level that allows for Amount of pressure change; 3. Minimum possible level Consistent with that measured in the fluidized bed near the fluidization velocity (each standpipe has one or more It will be clear to a person skilled in the art that there are more than one different pressure controls u47) .

Figure 1 shows a device with three standpipes; the standpipes used in this device There is no limit to the number of Total pressure gain (container 4 minus pressure in feed hopper 22 2) depends on the height and number of standpipes. in each standpipe The pressure gain is proportional to the height of the standpipe (solid head) and the density of the solid. on each standpipe For example, the weight of the solid at the bottom of the standpipe is 0.75 atm relative to the top For example, 0.01 atm is generated due to solid fluidization in the standpipe. Partially offset by pressure loss. Therefore, the total pressure gain for the standpipe is 8:1. The pressure is 0.65 atm. The solids rise along the riser and are transferred to the next standpipe. and suffers some pressure loss.

However, the total increase in the pressure nozzle j for a pair of standpipes and -I cup is, for example, from 0.5 atm to Since the pressure is 1 atm, the pressure between the container 42 (or reactor 43) and the hopper 22 is Significant pressure gains cannot be obtained by providing sufficient standpipes and risers, so additional The desired pressure gain is equal to or exceeds the desired pressure advantage.

In this method, the solids supplied from the gas from the high pressure container 42 (reactor 43) are It is desirable to preheat or preprocess the body in a continuous manner. child This feeds the last standpipe 13 and riser 16 (i.e. inlets 12G and 41). The last standpipe and riser (immediately High pressure reactor gas is used to use the gas exiting ports 46 and 30). 3. The valve mechanism 17 shown in FIGS. 3 and 4 can be more easily achieved by A sub-valve 37 is provided between the container and the container. ■Double t: deviate from street and tree falling. ■ Other non-mechanical valves or sliding valves such as type 12 valve, J sub-valve, etc. in the position of sub-valve 37 Mechanical valves such as can be used.

This device changes the pressure set point of the pressure regulator and at different levels of solids in the standpipe. Operate over a range of solids flow rates and a range of pressure gains by actuating You can do it.

The practical application of the present invention is to pneumatically convey fixed, e.g. -7 lye, wheat, sand. chemical reactors (e.g. The purpose is to inject it into a vaporizer).

In a variant (not shown), the hopper 22 is mounted on the top and the first standpipe ] 1 can be connected to the upper end of 1. However, this configuration requires a long ceiling height in the installation location. Therefore, the riser 14 shown between the hopper 22 and the first standpipe 11 It is preferable to use

In the present invention, without departing from the scope of the present invention as described in the claims. Various changes and modifications can be made to the embodiments described above.

FIG.1 Translation of amendment 41? , statement submission form (Article 184-7, Paragraph 1 of the Patent Act) 21X July 14L, 1985]

Claims (1)

[Claims] 1) A method in which solid particles are transferred from a first point at a constant pressure to a second point at a higher pressure. (a) at least one set of standpipes and risers; (b) an inlet; through the inlet to supply gas at constant pressure to the lower end of the standpipe and the bottom of the riser through the inlet. Supply high pressure gas to the end, (c) feeding the solid particles into the top of the riser; (d) directing the solid particles down the standpipe; to fluidize the solid particles in the standpipe so that they can flow (e) rising from the lower end of the standpipe through a valve mechanism that connects the standpipe and riser to each other; Transfer the solid particles to the bottom end of the vessel; (f) The solid particles are driven upwards in the riser by the gas flow directed upwards in the riser. let A method of transferring solid particles consisting of a process. 2) Transfer the solid particles at the top of the riser to the second set of standpipes and the top of the riser standpipe. The method according to claim 1, comprising steps (c) to (f). . 3) Reduce the pressure in the standpipe and riser of the second set of standpipe and riser to that of the first set of standpipe and riser. Claim 2, wherein the pressure is higher than that in the standpipe of the riser and the pressure inside the riser. Method. 4) In step (c), the flow of solid particles toward the bottom of the standpipe is The patent claims that the flow is reversed to the upward flow of gas in the standpipe that fluidizes the particles. The method according to any one of claims 1 to 3. 5) In step (c), the solid particles are transferred from the bulk feed hopper and riser to the standpipe. The method according to any one of claims 1 to 4, in which the method is supplied to the upper end. . 6) In step (c), the valve mechanism is a V-type valve, L-type valve, J-type valve or other non-mechanical valve. The method according to any one of claims 1 to 5, consisting of: 7) Connect the pressure in the standpipe and riser to the gas outlet at the top of the standpipe and riser. Any one of claims 1 to 6 adjusted by an automatic pressure controller connected to the The method described in item 1. 8) Gas outlet provided at the upper end of the standpipe and riser in the second set of standpipe and riser. the first set of standpipes and risers with lower pressure than the second set of standpipes and risers. The device according to any one of claims 1 to 7, which is connected to the inlet of the device. Law. 9) A device for transferring solid particles from a first point at a constant pressure to a second point at a higher pressure. at least one set of standpipes and risers and solid particles at the upper ends of the standpipes. supply a supply mechanism; Fluidize solid particles in the standpipe and flow the solid particles down the standpipe of a standpipe connected to a constant pressure gas source that supplies gas into the standpipe so that a gas inlet at the bottom end; a valve mechanism for transferring solid particles from the lower end of the standpipe to the lower end of the riser; Creates a gas flow upwards in the riser that drives the solid particles upwards in the riser. a gas inlet at the lower end of the riser connected to a high pressure gas source to A solid particle transfer device consisting of: 10) Transfer the solid particles at the top of the riser to the second set of standpipes and the top of the standpipe in the riser. 10. A device according to claim 9, which is supplied at the end. 11) The pressure inside the standpipe and riser in the second set of standpipe and riser is reduced to that of the first set of standpipe and riser. Claims that the pressure in the standpipe and riser is higher than the pressure inside the standpipe and riser Apparatus according to paragraph 10. 12) Direct the flow of solid particles downwards in the standpipe to fluidize the solid particles in the standpipe. Claims 9 to 11 represent a counterflow to the upward gas flow in the standpipe. The device according to any one of the above. 13) The feeding mechanism that supplies solid particles to the upper end of the standpipe includes a bulk feed hopper and a rising The device according to any one of claims 9 to 12, comprising a container. 14) Claims in which the valve mechanism is a V-type valve, L-type valve, J-type valve or other non-mechanical valve The device according to any one of items 9 to 13. 15) Connect the pressure in the standpipe and riser to the gas outlet at the top of the standpipe and riser. Any one of claims 9 to 14, wherein the pressure is adjusted by an automatic pressure controller. The device according to item 1. 16) Connect the gas outlet provided at the top of the second set of standpipes and risers to the standpipe and riser. of the first set of standpipes and risers which are at a lower pressure than the two sets of standpipes and risers; Claims 9 to 15 connected to the standpipe and the inlet of the riser, respectively. The device according to any one of the above. 17) From a first point at constant pressure to a second point at high pressure as described with reference to the accompanying drawings, solid A method according to claim 1 for transporting particles. 18) From a first point at constant pressure to a second point at high pressure as described with reference to the attached drawings, solid 10. A device according to claim 9 for transporting particles. 19) From the bulk supply hopper at atmospheric pressure as described with respect to the attached drawings, A method as claimed in claim 1, in which solid particles are transferred to the chemical reactor above. 20) Supplying solid particles to a chemical reactor at above atmospheric pressure as described with reference to the attached drawings. Apparatus according to claim 9.