Sand conveying and mixed discharging system and control method

Abstract

The invention provides a sand conveying and mixed discharging system and a control method. The sand conveying and mixed discharging system comprises a mixed discharging device, the structure of the mixed discharging device is characterized in that a feeding hopper is arranged at the top of a tank body, a main shaft is vertically arranged in the tank body by penetrating the feeding hopper, the mainshaft is connected with a driving device driving the main shaft to rotate, a booster impeller is arranged below the feeding hopper, the booster impeller is fixedly connected with the main shaft and rotates along with the main shaft, a top opening is formed in the middle of the top of the booster impeller, the bottom of the feeding hopper communicates with the top opening, a side wall opening is formed in the side wall of the booster impeller, the top opening communicates with the side wall opening, a bearing seat is arranged at the bottom of the main shaft, and a sealing device is arranged between the main shaft and the end part of the bearing seat. According to the system, through the arrangement of the structure of the booster impeller, the centrifugal force can be utilized to maintainthe pressure in the tank body, so that an additional pressurized feed tank is not arranged, the equipment structure is greatly simplified, the installation space of the equipment is reduced, and the equipment volume is reduced.

Description

technical field [0001] The invention relates to the field of fracturing equipment, in particular to a sand conveying and mixing discharge system and a control method. Background technique [0002] In the field of oil and natural gas production, the mixing device is the core equipment in the fracturing construction. The existing mixing device needs to mix the sand with the fracturing fluid solvent. The fracturing fluid solvent usually uses liquid carbon dioxide or liquid propane as the solvent . In the sand mixing tank of the mixing device, the pressure needs to be maintained. The existing construction plan is to add sand quantitatively to suppress the pressure. After the sand is used up, stop the operation and add sand and then suppress the pressure for construction. Continuous construction cannot be performed. Chinese patent document CN106761648A records a fracturing sand mixing device, a fracturing method, and a sand mixing equipment. In the prior art, a single-line prod...

AI Technical Summary

Problems solved by technology

In the prior art, a single-line production system is mostly used, that is, one manifold is set up for one mixed row. When there is a problem with a manifold or a problem with a mixed row device, the entire line cannot be used.

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