JPS61233196A - Air injection method in air lift well - 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] [Industrial Application Field] The present invention provides an air injection method in an air lift well. Regarding the injection method.

[Related technologies and their problems]

Generally, in pumping work, hole cleaning, dredging, etc., an airlift pipe and a pumping pipe are inserted concentrically into a pumping well, and the water is submerged to an appropriate depth according to the handling capacity of the compressor.
A compressor installed on the ground sends compressed air toward the bottom of the mine through an air lift pipe, blows the air into the lift pipe, and the rising air bubbles give buoyancy to the liquid, causing the liquid level in the lift pipe to rise. The water level in the pumping well is lowered and the liquid flows in from the lower end of the pumping pipe, and the difference between the pressure in the pumping well and the pressure inside the pumping pipe is used to handle the liquid. Since compressed air is simply sent into the lift pipe, the compressed air discharged at once from the tip of the air lift pipe towards the bottom of the mine cannot be sufficiently mixed with the liquid in the water and becomes a mass of air bubbles that float up inside the lift pipe. - Only a part of the bubble nodules were mixed into the liquid during the ascent, but the remaining nodules did not help the buoyancy of the liquid and were emitted into the atmosphere. For this reason, the pumping is intermittent, the amount handled tends to be uneven, and the supplied air is wasted, resulting in a large economic loss.

[Purpose of the invention]

An object of the present invention is to prevent waste of air bubbles and increase handling efficiency.

[Summary of the invention]

The air injection method in an airlift well of the present invention includes a nozzle that is rotatably provided in an airlift pipe and has a reverse injection hole, and a bubble fine particle body disposed above the reverse injection hole, and the air bubbles that are reversely injected. is dispersed by the rotation of the nozzle and is injected towards the fine bubbles, collides with the fine bubbles and becomes fine particles, increasing the contact area between the bubbles and the liquid, and handling them continuously and in a nearly uniform amount. It also prevents wastage of air bubbles from being fried.

〔Example〕

In FIGS. 1 to 5, reference numeral 1 indicates a pumping pipe of about 60 mm in diameter, which is submerged into the pumping well 2 to the lift depth. 3
This is usually an air lift pipe of about 258, and is a small diameter pipe for passing the compressed air pumped from the near compressor 4 on the ground, and is submerged in water at the depth of the near compressor 4's capacity. 5 is a connection cup for the air lift pipe 3, into which an upper bearing box 6 is fitted. 7
is a bubble fine granule fixed to the upper bearing I'fJ&CKS 6; @.

A plurality of blades 7a are incorporated in a diagonal direction as shown in FIG.
A reinforcing ring 7b is provided at the lower end. 8 is an upper bearing, which is part of the nozzle cylinder 9a of the nozzle 9.
It supports rotation freely. A lower bearing 10 rotatably supports a nozzle body 9b having a plurality of nozzle holes 11 facing diagonally upward and slanting in the circumferential direction as shown in FIG. Reference numeral 12 denotes an air inflow head, which has a plurality of air inflow holes 13 as shown in FIG.
is screwed into. A lower bearing cap 15 is screwed into the rod stem 14 and supports the lower bearing 10.

Thus, the air pumped through the near compressor 4 on the ground passes through the air inlet hole 13 of the air inflow head 12 from the air lift pipe 3, passes through the nozzle cylinder 9a, the lower bearing rod stem 140, and the gap 16. The water is ejected into the water inside the water pump 1 from a plurality of nozzle holes 11 facing diagonally upward and outward. This fume collides with the inner wall of the lift pipe 1 and causes a reaction, giving a rotational movement to the nozzle 90 in the direction of the arrow in FIG.
are supported by upper and lower bearings 8110, respectively, and rotate smoothly to uniformly disperse the ejected air bubbles within the water pump 1.

The dispersed bubbles further collide with the blades 7a of the fine bubble granules 7 arranged above the nozzle hole 11, and are agitated and dispersed upward, making the bubbles even finer and increasing the contact area between the bubbles and the liquid. The buoyancy is increased, the pumping efficiency is increased, and the amount of pumped water can be obtained uniformly and continuously.

If the diameter of the pumping well 2 is small, the air lift pipe 3 is inserted directly into the pumping well 2 without using the pumping pipe 1 as shown in Fig. 6, and the liquid level in the pumping well 2 is raised by supplying air. You may also do so. It should be noted that a plurality of cellular fine particles 7 may be used to increase the effect.

〔Effect of the invention〕

The present invention is equipped with a nozzle rotatably installed in an air lift tube and a fine air bubble, and the air bubbles are injected backward from the nozzle hole and are dispersed by the rotation of the nozzle, and are injected toward the fine air bubble. The bubbles collide with the fine particles and become fine particles, increasing the contact area between the bubbles and the liquid, allowing them to be handled continuously and in a substantially uniform amount, preventing wastage of the bubbles, which is highly effective.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the usage state of the present invention, Fig. 2 is a cross-sectional view of essential parts of the present invention, Fig. 3 is a cross-sectional view taken along line A-A in Fig. 2, and Fig. 4 is a cross-sectional view of the main part of the present invention. BB line sectional view, Figure 5 is the second
A sectional view taken along the line CC in the figure, and FIG. 6 is a sectional view of another embodiment. 1.. Lifting pipe 2.. Pumping well 3.. Air lift pipe 7
...Bubble fine particles 9...Nozzle No. 1 Figure 1]'. Figure 2 Figure 3 114m Figure 5a Figure 6

Claims (1)

[Claims] In an air injection method for an air lift well, in which compressed air is sent into a pumping well from an air lift pipe, and air bubbles rise due to the air jet, giving buoyancy to the liquid for pumping, the air lift pipe is rotatably provided with a reverse injection hole. The air bubbles reversely injected from the reverse injection hole are dispersed by the rotation of the nozzle and are injected toward the bubble fine particles. A method of air injection in an airlift well, characterized by colliding with particles and causing them to rise as fine particles.