JPS636084A - Slurry reactor - Google Patents

Abstract

PURPOSE:To stably operate a slurry treatment system while preventing solid materials from accumulating, by guiding a high-temp. and high-pressure slurry produced in a coal liquefying facility etc. into a slurry reactor of suspension bubble column type, where the slurry is reacted with a counterflowing hydrogen gas and discharging any product from the bottom thereof in a controlled amt. CONSTITUTION:A high-temp. and high-pressure slurry of coal etc. heated to 350-400 deg.C in a heating furnace in a coal liquefying facility etc. is fed through an upper feed line 12 into a slurry reactor 2b of suspension bubble column type. A hydrogen gas pressurized by the use of an H2 gas compressor is fed through a lower feed line 11 into the reactor. In the reactor 2b, the slurry is uniformly reacted with the hydrogen gas in a counterflow state. The coal slurry obtd. as a reaction product is transferred through a bottom discharge line 13 to a next step while controlling the opening of the valve 15 by means of a level controller 16, a flow rate control valve 15, and a control line 17 so as to attain a desirable liq. level height. On the other hand, the hydrogen gas entrained with mist vapor is discharged from an upper discharge line 14. The mist is separated, and the hydrogen gas is recycled for use.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a suspension bubble column reactor used in high temperature and high pressure slurry processing equipment.

[Prior Art] FIG. 3 shows a high-pressure slurry processing facility such as a coal liquefaction facility. In such high-pressure slurry processing equipment, a process fluid, ie, coal slurry, pumped by a pump 4 is heated to 350 to 400°C in a heating furnace, and the slurry heated in this heater 1 is reacted with hydrogen gas in a reactor 2. Ru. This hydrogen gas is supplied to the reactor 2 via a hydrogen gas compressor 5, and is also supplied to the slurry entering the heating furnace 1 via a positive displacement hydrogen gas compressor 6 to prevent the viscosity of the slurry from increasing. do. Then, after hydrogen gas is separated in the high temperature separation tank 3 at a pressure of about 250 9/ciG and an IA degree of about 2o0°C, the pressure is reduced to ai
118 as a liquefied oil, and further processed in a solid-liquid separation system.

FIG. 2 shows a conventional reactor 2a. The conventional reactor 2a in this slurry processing equipment is equipped with a lower supply pipe 7 that supplies coal slurry and hydrogen gas from branch pipes 7a and 7b, and an upper discharge pipe 8 that discharges reaction products. be.

[Problems to be Solved by the Invention] According to this conventional reactor, Ca compounds condense and grow in the reactor 2a, settle in the slurry, and accumulate at the bottom. In addition, 11 derived from short passes of ball mills etc.
Coarse particles of about 00u accumulate. If these solids are left as they are, the pressure drop in the reactor 2a will increase, or
The required amount of hydrogen gas is no longer incorporated, and the pressure in the treatment system increases, causing troubles such as coking in the piping of the heating furnace 1. For this reason, a proposal has been made to discharge these solids by opening the H2 valve 10 provided in the solids discharge pipe 9 at the bottom of the reactor at predetermined intervals.

However, since the H2 valve 10 opens and closes intermittently, there are problems such as slurry being trapped or thermal shock occurring.

The present invention has been made in view of the above, and an object of the present invention is to provide a reactor in which no solid matter accumulates inside the reactor.

[Means for Solving the Problems] According to the present invention, slurry heated to a high temperature by a heater is reacted with hydrogen gas, and this reaction product is used in a slurry processing system in which gas and liquid are separated in a high temperature separation tank. In the reactor, an upper supply pipe for supplying high temperature slurry from the heater, a lower supply pipe for supplying hydrogen gas, an upper discharge pipe for discharging gas, and communicating the reaction product with a separation tank. A slurry reactor is provided in which a bottom discharge pipe is provided so that hydrogen gas and slurry flow in opposite directions, and reaction products therein can be discharged according to the liquid level height.

[Function] According to this reactor, the slurry supplied through the upper supply line descends in the reactor, and the hydrogen gas supplied through the lower supply line flows upward with the slurry. flows. After the hydrogen gas is separated from the accompanying vapor mist, it is returned to the heating furnace 6 and the reactor as a circulating gas, and the reaction products are automatically controlled at this liquid level and sent to the bottom discharge pipe. It is then sent to the next high-temperature separation tank. Therefore, it is formed as a suspension bubble column type reactor, and the liquid level height is automatically adjusted.

[Example] Figure 1 shows a slurry reactor according to one embodiment of the present invention.

This slurry reactor 2b is used, for example, in the coal liquefaction equipment shown in FIG. 3, and is a suspension bubble column type equipped with an upper supply pipe 12 for supplying coal slurry and a lower supply pipe 11 for supplying hydrogen gas. It is designed as a reactor. The coal slurry reacted in the slurry reactor 2b is discharged through the bottom discharge pipe 13, and the hydrogen gas accompanied by mist vapor is discharged through the upper discharge pipe 14. A flow control valve 15 is disposed in the bottom discharge pipe 13, and the flow control valve 15 is opened via a control pipe 17 by a liquid level 111I control device 16 provided in the slurry reactor 2b. degree is controlled.

That is, when this slurry reactor 2b is used in the coal liquefaction equipment shown in FIG. , hydrogen gas is supplied from the hydrogen gas compressor 5 via the lower supply pipe line 11. The coal slurry and hydrogen gas react uniformly in the slurry reactor 2b in counterflow, and the coal slurry as a reaction product is controlled to flow out according to the liquid level height by the flow control valve 15, and is discharged from the bottom. It is sent from the pipe 13 to the high temperature separation tank 3. The pressure in this separation tank 3 is, for example, about 25C1/dG.
, the temperature is about 200℃, and there is a decompression device! 18, the oil is depressurized to about 5 kg/cdG, sent to the next processing system, and finally taken out as liquefied oil.

Further, the hydrogen gas accompanied by the mist vapor discharged through the upper discharge pipe 14 of the slurry reactor 2b is circulated again through the hydrogen gas compressor 5.6 together with the hydrogen gas separated from the high temperature separation tank 3. .

In the slurry reactor 2b, coal slurry is supplied from the top and pumped out from the bottom, contrary to hydrogen gas, so that hydrogen gas and coal slurry react uniformly, and Ca compounds and coarse particles are also removed at the same time. I can put it out. Therefore, solid matter does not settle and accumulate in the reactor 2b. Furthermore, since there is no need to intermittently discharge solid matter using the conventional H2 valve, stable processing can be performed without causing pressure fluctuations in the coal slurry processing system.

[Effects of the Invention] As is clear from the above, according to the present invention, the slurry reactor is a suspension bubble column type reactor, and the reaction product can be continuously extracted from the bottom, and the solids can be removed from the slurry reactor. Deposition can be prevented and stable operation of the slurry processing system can be achieved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a slurry reactor according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of a conventional slurry reactor, and FIG. 3 is an explanatory diagram of a slurry processing system. DESCRIPTION OF SYMBOLS 1... Heating furnace, 2... Slurry reactor, 3... Separation tank, 11... Lower supply pipe line, 12... Upper supply pipe line, 13... Bottom discharge pipe line, 14 ...Upper discharge pipe, 15...Flow rate control valve, 16...Flow rate control device, 1
7... Control WJ pipeline. Applicant's agent Patent attorney Takehiko Suzue Figure 1 I3 Figure 2

Claims (1)

[Claims] In a reactor used in a slurry processing system in which slurry heated to a high temperature by a heater is reacted with hydrogen gas and the reaction product is separated into gas and liquid in a high-temperature separation tank, an upper part to which high-temperature slurry from the heater is supplied. A supply pipe, a lower supply pipe that supplies hydrogen gas, an upper discharge pipe that discharges gas, and a bottom discharge pipe that communicates the reaction product to the separation tank are provided to face the hydrogen gas and the slurry. A slurry reactor characterized in that the reaction product inside can be discharged according to the height of the liquid level.