Acid liquor removal device and method for kerogen preparation

Abstract

The invention discloses an acid liquor removing device and method for kerogen preparation. The device comprises the following equipment: a reaction tank, a suction head, a liquid storage tank, a buffer bottle, a vacuum pump, a first connecting pipe, a second connecting pipe and a third connecting pipe. The method comprises the following steps: connecting equipment of the device, closing a discharge port valve of the liquid storage tank, and setting initial vacuum negative pressure; enabling the suction head to be in contact with the liquid level of the acid liquor, and removing the acid liquor; and when the liquid level of the acid liquid entering the liquid storage tank is close to the bottom end of the outlet connecting pipe of the liquid storage tank, the acid liquid in the liquid storage tank is discharged. And repeating the steps until the target acid liquor in the reaction tank is completely removed. The vacuum pump is used for replacing a traditional water pumping pipe, water resources are saved to a great extent, meanwhile, the suction force of the device is adjustable, the operation process is more accurate and stable, the waste liquid treatment cost is saved, and the enterprise economic expenditure is reduced.

Description

technical field [0001] The invention belongs to the field of oil and gas exploration research, and more specifically relates to an acid liquid removal device and method for kerogen preparation. Background technique [0002] Kerogen refers to dispersed organic matter in sedimentary rocks that is insoluble in alkali, non-oxidizing acid and non-polar organic solvents. Kerogen is the main body of dispersed organic matter and the most important original material for oil generation. It is well known that the hydrocarbon-forming potentials of different types of kerogen are quite different, and the properties of the products are also different. Therefore, in the evaluation of oil and gas resources, it is of great significance to correctly identify the type of kerogen. Kerogen separation uses chemical and physical methods to remove inorganic minerals and chloroform-soluble organic matter in rocks and enrich other organic matter. At present, the separation method of kerogen is carri...

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Problems solved by technology

At present, the separation method of kerogen is carried out according to the national standard GB / T19144-2010 "Kerogen Separation Method in Sedimentary Rocks". When removing inorganic minerals in rocks, pour hydrochloric acid and hydrofluoric acid into the acid reaction tank with samples for heating Reaction, the acid solution needs to be removed after the reaction is completed. GB / T19144-2010 only requires the removal of the acid solution. As for how to remove it, there are no provisions, let alone the content of the acid removal device and method. The hydrochloric acid and hydrofluoric acid used in the experiment They are all poisonous and harmful reagents with strong corrosiveness, and should be avoided as much as possible. The current more common acid removal method mainly relies on the suction generated by the suction pipe to remove the acid liquid. Since the suction of the suction pipe depends on the negative pressure caused by wading, so The current deacidification method has caused a lot of waste of water resources, and also greatly increased the amount of waste liquid, increasing the cost of waste liquid treatment

The existing acid removal operation in kerogen separation has certain limitations in terms of environmental protection and economy

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