Rotating apparatus and method for measuring acid-rock reaction characteristics in high temperature and pressure

Patent metadata

Field	Value
Publication number	US-10983105-B2
Application number	US-201815928568-A
Country	US
Kind code	B2
Filing date	Mar 22, 2018
Priority date	Mar 23, 2017
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

An apparatus for controlling acid-rock reaction includes a first reactor, a second reactor connected to the first reactor and configured to produce a spent acid through reaction of a rock with an acid aqueous solution and to introduce the spent acid into the first reactor, the first reactor being configured to react a rock disk with the spent acid introduced from the second reactor, a sample extractor connected to the first reactor and configured to extract, from the first reactor, a predetermined amount of the spent acid reacting with the rock disk in the first reactor, and a data acquisition device configured to acquire temperature and pressure data of the first reactor and the second reactor and control the first reactor and the second reactor based on he acquired temperature and pressure data of the first reactor and the second reactor.

First claim

What is claimed is:

1. An apparatus for controlling acid-rock reactions, the apparatus comprising:
a first reactor;
a second reactor connected to the first reactor and configured to produce a spent acid through reaction of a rock with an acid aqueous solution, and to introduce the spent acid into the first reactor, wherein the first reactor is configured to react a rock disk with the spent acid introduced from the second reactor;
a sample extractor connected to the first reactor and configured to extract, from the first reactor, a predetermined amount of the spent acid reacting with the rock disk in the first reactor; and
a data acquisition device configured to acquire temperature and pressure data of the first reactor and the second reactor and control the first reactor and the second reactor based on he acquired temperature and pressure data of the first reactor and the second reactor,
wherein the first reactor is configured to react the rock disk with the spent acid under a first reservoir condition comprising a first high temperature and a first high pressure,
wherein the second reactor is configured to produce the spent acid by reacting the rock with the acid aqueous solution under a second reservoir condition comprising a second high temperature and a second high pressure,
wherein the first reactor comprises:
a first reaction vessel in which the rock disk reacts with the spent acid;
a first heating jacket configured to maintain the temperature of the first reservoir condition in the first reaction vessel;
a first magnetic drive configured to rotate a shaft connected to the rock disk at a first rotating speed when the rock disk reacts with the spent acid; and
a first sensor configured to measure an internal temperature and a pressure of the first reaction vessel,
wherein the second reactor comprises:
a second reaction vessel configured to include a permeable container to contain the rock and further configured to store the spent acid produced through the reaction of the rock with the acid aqueous solution under the second reservoir condition;
a second heating jacket configured to maintain the temperature of the second reservoir condition in the second reaction vessel;
a second magnetic drive configured to rotate a shaft connected to the permeable container containing the rock at a second rotating speed when the rock reacts with the acid aqueous solution;
a second sensor configured to measure an internal temperature and a pressure of the second reaction vessel; and
a cylinder configured to introduce the spent acid stored in the second reaction vessel into the first reactor by pushing the spent acid to the outside of the second reaction vessel,
wherein the data acquisition device is further configured to acquire the temperature and pressure data of the first reactor and the second reactor from the first sensor and the second sensor and to adjust temperatures of the first reaction vessel and the second reaction vessel by controlling the first heating jacket and the second heating jacket, and
wherein the data acquisition device is configured to adjust the first rotating speed of the first magnetic drive and the second rotating speed of the second magnetic drive based on the acquired temperature and pressure data of the first reactor and the second reactor.

2. The apparatus of claim 1 , wherein the sample extractor comprises a first sampling valve, a sampling line connected to the first sampling valve, a second sampling valve connected to the sampling line, and a sampling tank connected to the second sampling valve,
wherein the first sampling valve is configured to move the acid reacting with the rock disk in the first reactor to the sampling line, the sampling line is configured to have the acid moved from the first reactor loaded therein, the second sampling valve is configured to move the acid loaded in the sampling line to the sampling tank, and the sampling tank is configured to store the acid moved from the sampling line.

3. The apparatus of claim 1 , further comprising a vent connected to the first reactor and the second reactor and configured to discharge internal fluid of the first reactor to the outside after the reaction of the rock disk with the acid finishes in the first reactor and discharge internal fluid of the second reactor to the outside after the reaction of the rock with the acid aqueous solution finishes in the second reactor.

4. The apparatus of claim 3 , wherein the vent comprises:
a neutralization tank configured to load a neutralizing agent therein to neutralize an acid;
a first vent valve configured to move the internal fluid of the first reactor to the neutralization tank after the reaction of the rock disk with the acid finishes; and
a second vent valve configured to move the internal fluid of the second reactor to the neutralization tank after the reaction of the rock with the acid aqueous solution finishes.

5. The apparatus of claim 1 , wherein the acid extracted by the sample extractor is used to calculate a dissolution rate and a diffusion coefficient of the acid reacting with the rock through the first reactor and the second reactor.

6. The apparatus of claim 1 , wherein the first reactor includes the rock disk and the spent acid, and the spent acid reacting with the rock disk is at least one acid selected from the group consisting of a hydrochloric acid, an organic acid, and an acid blend, and
wherein the second reactor includes the rock, and the rock comprises a carbonate rock.

7. A method for controlling acid-rock reactions by an apparatus including a first reactor, a second reactor, a sample extractor, and a data acquisition device, the method comprising the steps of:
producing a spent acid by reacting a rock with an acid aqueous solution in the second reactor, and introducing the spent acid into a first reactor;
reacting a rock disk with the spent acid introduced from the second reactor in the first reactor;
extracting, by the sample extractor, from the first reactor, a predetermined amount of the spent acid reacting with the rock disk in the first reactor; and
acquiring, by the data acquisition device, temperature and pressure data of the first reactor and the second reactor and controlling, by the data acquisition device, the first reactor and the second reactor based on the acquired temperature and pressure data of the first reactor and the second reactor,
wherein the rock disk is reacted with the spent acid in the first reactor under a first reservoir condition comprising a first high temperature and a second high pressure,
wherein the spent acid is produced by reacting the rock with the acid aqueous solution in the second reactor under a second reservoir condition comprising a second high temperature and a second high pressure,
wherein the first reactor comprises a first reaction vessel in which the rock disk reacts with the spent acid, a first heating jacket, a first magnetic drive, and a first sensor,
wherein the method further comprises:
maintaining, by the first heating jacket, the temperature of the first reservoir condition in the first reaction vessel;
measuring, by first sensor, an internal temperature and a pressure of the first reaction vessel; and
rotating, by the first magnetic drive, a shaft connected to the rock disk at a first rotating speed when the rock disk reacts with the spent acid,
wherein the second reactor comprises a second reaction vessel in which the rock reacts with the acid aqueous solution, a second heating jacket, a second magnetic drive, a second sensor and a cylinder, the second reaction vessel including a permeable container containing the rock,
wherein the method further comprises:
maintaining, by the second heating jacket, the temperature of the second rese

Assignees

• Univ Nat Chonnam Ind Found

Inventors

• Lee Jeonghwan
• Yoo Hyunsang

Classifications

• B01J3/00

  Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor (pressure vessels for containing or storing compressed, liquefied or solidified gases F17C) · CPC title

• B01J2219/00177

  controlling the pH · CPC title

• B01J19/0006

  Controlling or regulating processes (controlling or regulating in general G05) · CPC title

• B01J19/18

  Stationary reactors having moving elements inside (B01J19/08, B01J19/26 take precedence) · CPC title

• G01N13/00 Primary

  Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects (scanning-probe techniques or apparatus G01Q) · CPC title