CN201157753Y - A non-stirring oxidation device for flue gas desulfurization slurry tank - Google Patents

Abstract

A flue gas desulfurization slurry tank non-stirring oxidation device, the utility model is an oxidation device for flue gas desulfurization, the lower part of the slurry tank is equipped with a circular conduit, and at least one diameter of the circular conduit is provided with an arc-shaped conduit at both ends. The lower end of the arc-shaped conduit communicates with the circular conduit, and the upper end stretches out of the slurry pool and is connected to the output end of the air compressor 6 through an outer connecting pipe; The lower section of the arc duct is arc-shaped, and the upper jet pipes are oppositely arranged on the arc section pipe walls of the two arc ducts. The utility model compresses the air required for oxidation and sprays it out from the jet pipe to promote the flow of the slurry in the slurry pool and form a swirl, thereby achieving the purpose of stirring calcium sulfite, eliminating the need for a stirring device; moreover, using air for stirring It is also conducive to the full contact between oxygen and calcium sulfite, which improves the desulfurization efficiency.

Description

A non-stirring oxidation device for flue gas desulfurization slurry tank

technical field

The utility model relates to a flue gas desulfurization device, in particular to a non-stirring oxidation device for a slurry pool of flue gas desulfurization.

Background technique

With the rapid and sustained economic development, the atmosphere is becoming more and more polluted by SO ₂ . Flue gas desulfurization (FGD) of coal-fired boilers is currently the only way to reduce _SO2 emissions on a large scale. In this technology, limestone-gypsum wet flue gas desulfurization (WFGD) occupies a dominant position. In WFGD, there are currently two main technologies, one is liquid column technology and the other is spray tower technology. The two technologies are distinguished by different types of desulfurization towers.

In the limestone-gypsum wet flue gas desulfurization process, the oxidation of calcium sulfite is an important chemical process, and its oxidation efficiency is directly related to the removal rate of _SO2 and the quality of the by-product gypsum, so it can be improved through appropriate ways The oxidation efficiency of calcium sulfite is of great significance to the limestone-gypsum wet flue gas desulfurization process.

At present, in the selection of oxidation technology and equipment in the slurry tank, most of them adopt the method of air spray gun and agitator. Although a high oxidation rate of calcium sulfite can be obtained, the equipment is complicated, and the agitation device often breaks down. Chinese Patent Publication No. CN1439449 discloses "a wet spray flue gas desulfurization device". The atomization mass of the droplet. Chinese Patent Publication No. CN101062462 discloses a "side-mounted liquid holding tank flue gas desulfurization device", which consists of a flue gas desulfurization section and a side mounted liquid holding tank. The flue gas enters from the bottom of the flue gas desulfurization section, and contacts with the absorbing liquid sprayed and dropped from the top, and the sulfur dioxide in the flue gas is removed; There is no liquid at the bottom of the liquid tank and the flue gas desulfurization section; an agitator is installed on the upper part of the liquid holding tank to prevent the precipitation of suspended particles in the absorption liquid, and the bottom of the liquid holding tank is blown into oxidizing air, and the oxidized gas enters the flue gas desulfurization section and is purified After that, the flue gas is discharged together. All above-mentioned two patents are provided with stirrer, and stirrer is driven by high-power electric motor, is provided with stirring impeller, and structure is comparatively complicated, easily breaks down, and the deposit on the impeller also needs to be cleaned regularly.

Utility model content

The purpose of the utility model is to provide a flue gas desulfurization slurry tank oxidation device without stirring device.

In order to achieve the above object, the technical scheme of the utility model is as follows: comprising a slurry pool, the bottom of the slurry pool is equipped with a circular conduit, and at least one diameter of the circular conduit is provided with a first arc-shaped conduit and a second arc-shaped conduit. Conduit, the lower end of the first arc-shaped conduit and the second arc-shaped conduit communicate with the circular conduit, and the upper end extends out of the slurry pool to connect with the output end of the air compressor through the outer connecting pipe; the inner ring of the circular conduit A lower jet pipe is provided. In order to generate swirl flow in the lower part of the slurry pool, the center line of the lower jet pipe and the tangent passing through the intersection of the center line and the circular conduit form an acute angle α, and α is 1° to 45°; The lower sections of the first arc duct and the second arc duct are arc-shaped, and an upper jet pipe is arranged on the pipe wall of the arc section. The tangent line of the intersection of the trachea is the reference line, and the plane where the reference line and the axis line of the slurry pool are in common is the reference plane, and the included angle formed between the reference plane and the center line of the upper jet pipe is an acute angle β, and β is 45° degrees to 89 degrees; in order to make the direction of the swirl flow generated by the upper jet pipe and the lower jet pipe consistent, the rotation direction of the lower jet pipe and the upper jet pipe is the same.

Preferably, the number of upper air injection pipes on the wall of the first arc-shaped duct and the arc section of the second arc-shaped duct is 3-8, and the number of lower air injection pipes on the above-mentioned circular duct is 4-10.

Beneficial effects: the utility model compresses the air required for oxidation and ejects it from the jet pipe to promote the flow of the slurry in the slurry pool and form a swirl, thereby achieving the purpose of stirring calcium sulfite and eliminating the need for a stirring device; moreover, using Stirring by air is also conducive to the full contact between oxygen and calcium sulfite, which improves the desulfurization efficiency.

Description of drawings

Fig. 1 is the front view of the utility model first embodiment;

Fig. 2 is a view along A-A in Fig. 1;

Fig. 3 is the enlarged view of I place in Fig. 1;

Figure 4 is an enlarged view of J in Figure 2;

Fig. 5 is along the direction view of B-B in Fig. 1;

Fig. 6 is a schematic structural diagram of the second embodiment of the present invention.

Detailed ways

The utility model is further described below in conjunction with accompanying drawing and embodiment:

Embodiment 1, as shown in Fig. 1 and Fig. 2, the utility model mainly is made up of slurry pool 7, circular conduit 3, arc conduit 1,2 and air compressor 6, and circular conduit 3 is installed on the side of slurry pool 7 In the lower part, the two ends of a diameter of the circular conduit 3 are provided with a first arc conduit 1 and a second arc conduit 2, and the lower ends of the first arc conduit 1 and the second arc conduit 2 communicate with the circular conduit 3 , the upper end extends out of the slurry tank 7 and is connected with the output end of the air compressor 6 through the external connecting pipe 8 .

Further as shown in Fig. 3, Fig. 4 and Fig. 5, on the inner ring of described circular conduit 3, be welded with 8 lower jet tubes 5, the center line of this lower jet tube 5 and pass through this center line and circular duct 3 The tangent of the intersection point is an acute angle α. When α is 1 degree, the swirl velocity formed by the air ejected from the lower jet pipe 5 is the largest. When α is 45 degrees, the compressed air can stir the slurry in the middle, and α can also be at 1 degree. to 45 degrees; the upper section of the first arc-shaped duct 1 and the second arc-shaped duct 2 is vertical, and the lower section is arc-shaped, and 4 upper jet pipes 4 are welded oppositely on the arc-shaped section pipe wall, so as to The tangent of the center line of the upper jet pipe 4 and the intersection point of the upper jet pipe 4 is a reference line, and the common place plane of the reference line and the axis line of the slurry pool 7 is a reference plane, and the reference surface and the upper jet pipe 4 The included angle formed by the centerline of the center line is an acute angle β. When β is 89 degrees, the swirl speed formed by the air ejected from the upper jet pipe 4 is the largest. When β is 45 degrees, the compressed air can stir the slurry in the middle like this, and β It can also be between 45 degrees and 89 degrees; the rotation direction of the lower air jet pipe 5 and the upper air jet pipe 4 is the same, and they all deflect in the counterclockwise direction. The air pipes 5 are all inclined upwards, so that the slurry on the upper part of the slurry tank can be stirred, so that the slurry in the whole slurry tank is fully stirred.

Embodiment 2, as shown in Figure 6, a first arc-shaped conduit 1, a second arc-shaped conduit 2, a third arc-shaped conduit 9 and a fourth The arc conduit 10, other structures are the same as that of embodiment 1, and four arc conduits blow compressed air into the slurry pool 7, so that the slurry is stirred more evenly, which is more conducive to the oxidation reaction. When the volume of the slurry pool is large, it needs For greater stirring kinetic energy, the number of curved conduits can continue to be increased.

At the same time, the utility model can also use the self-priming pump to introduce the mixture of air and slurry, thereby obtaining greater driving force.

Claims (2)

1. A flue gas desulfurization slurry tank without agitation oxidation device, comprising a slurry tank (7), characterized in that: the bottom of the slurry tank (7) is equipped with a circular conduit (3), and the circular conduit (3) has at least one The two ends of the diameter are provided with a first arc conduit (1) and a second arc conduit (2), and the lower ends of the first arc conduit (1) and the second arc conduit (2) are connected to the circular conduit ( 3) connected, the upper end protrudes from the slurry pool (7) and is connected to the output end of the air compressor (6) through the outer connecting pipe (8); the inner ring of the circular conduit (3) is provided with a lower jet pipe ( 5), the centerline of the lower jet pipe (5) and the tangent passing through the intersection of the centerline and the circular conduit (3) form an acute angle α, where α is 1° to 45°; the first arc conduit (1) And the lower section of the second arc-shaped conduit (2) is arc-shaped, and the upper air-jet pipe (4) is provided on the pipe wall of the arc-shaped section, and the center line of the upper air-jet pipe (4) intersects with the upper air-jet pipe (4) The tangent line is the reference line, and the common plane of the reference line and the axis line of the slurry pool (7) is the reference plane, and the included angle between the reference plane and the center line of the upper jet pipe (4) is an acute angle β , β is 45 degrees to 89 degrees; the rotation direction of the lower jet pipe (5) and the upper jet pipe (4) is the same. 2. The flue gas desulfurization slurry tank non-stirring oxidation device according to claim 1, characterized in that: the upper gas injection pipe (4) on the first arc-shaped conduit (1) and the second arc-shaped conduit (2) The number is 3-8; the number of the lower jet pipes (5) on the circular duct (3) is 4-10.

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