Efficient composite wet-type electric precipitator for steel rolling

Abstract

The utility model aims to provide an efficient composite wet-type electric precipitator for steel rolling, which comprises an air inlet bin, an air pipe connected with an air inlet is arranged in the air inlet bin, and the air inlet bin is divided into a first air duct and a second air duct by the air pipe. A plurality of side notches communicated with the first air duct and the second air duct are formed in the side wall face of the air inlet bin, an air guide piece is arranged in each side notch, and smoke in the air pipe is intercepted and guided into the first air duct and the second air duct. The utility model relates to the technical field of steel rolling equipment, through the design of the air pipe, smoke entering from the air inlet can be averagely separated in a plurality of separation bins in the first air duct and the second air duct by adopting the air guide sheets and the side notches, so that the smoke can drift upwards relatively uniformly; and a gas homogenizing plate of the wet-type electric dust remover can comprehensively receive flue gas, so that the flue gas can be homogenized to the greatest extent and then enters a cathode and anode system to be subjected to adsorption and dust falling treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of steel rolling equipment, in particular to a high-efficiency composite wet electric dust collector used for steel rolling. Background Art

[0002] Common electrostatic precipitators include dry electrostatic precipitators, wet electrostatic precipitators, mist particle electric collectors and semi-wet electrostatic precipitators. In the field of steel smelting, due to the high dust content in the flue gas, dust reduction must be carried out through special gas cabinets or secondary dust removal equipment. The use of wet electrostatic precipitators can remove and adsorb dust particles in the flue gas to the greatest extent, with high dust removal efficiency of up to 99.9%, which is suitable for occasions with large flue gas volumes. It can adapt to high temperatures and can handle dusty gases with temperatures above 450°C.

[0003] The wet electrostatic precipitator consists of its main body and an external desulfurization tower. The large amount of flue gas generated during the steel rolling process is collected and first enters the desulfurization tower for the first step of dust reduction to remove larger particles of flue dust; then it enters the air inlet bin of the wet electrostatic precipitator main body, passes through the air equalizing plate and then is adsorbed and dust removed through the anode and cathode systems.

[0004] Although an air equalizing plate is installed in the existing wet electrostatic precipitator, the flue gas enters the air inlet bin in the form of a continuous impact airflow, which continuously acts on a certain point on the air equalizing plate. The air equalizing plate cannot evenly receive the flue gas from below, thereby reducing the effectiveness of the air equalizing plate, resulting in uneven amounts of flue gas received in the anode and cathode systems, thereby reducing the processing efficiency. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a high-efficiency composite wet electrostatic precipitator for steel rolling, which solves the problem that the flue gas entering the existing wet electrostatic precipitator continuously acts on the gas equalizing plate, thereby reducing the use effect of the gas equalizing plate and affecting the processing efficiency of the anode and cathode systems.

[0006] To achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a high-efficiency composite wet electrostatic precipitator for steel rolling, the electrostatic precipitator comprising an air intake bin, the air intake bin having an air inlet for allowing smoke to enter, an air duct connected to the air inlet is arranged in the air intake bin, the air duct divides the air intake bin into a first air duct and a second air duct, the side wall of the air intake bin is provided with a plurality of side cuts connected to the first air duct and the second air duct, each of the side cuts is provided with an air guide plate, the air guide plate intercepts the smoke in the air duct and guides it into the first air duct and the second air duct.

[0007] Preferably, one end of the air guide plate extends into the air duct through the side incision, and the other end is arranged in the first air duct and the second air duct.

[0008] Preferably, there is a gap between the adjacent air guide plates on both sides of the air duct, and the gap gradually decreases along the direction of smoke flow.

[0009] Preferably, the air guide piece comprises:

[0010] A blocking portion extends into the air duct along the side cutout, and the blocking portion is a curved plate;

[0011] The ventilation part is fixed to the blocking part as a whole and is arranged in the first air duct and the second air duct;

[0012] The hollow portion is formed on the ventilation portion.

[0013] Preferably, the hollow portion includes a ventilation hole opened on the ventilation portion, and a blocking piece is fixed in the ventilation hole.

[0014] Preferably, an inner angle a is formed between the baffle and the ventilation portion, and 45°<α<90°.

[0015] Preferably, the hollow portion comprises a mesh plate.

[0016] Preferably, the top of the air-permeable portion extends upward to form an upper baffle; a partition is formed between two adjacent air guide plates in the first air duct and the second air duct, and an air equalizing plate fixed to the upper baffle is provided on the top of the partition.

[0017] Beneficial Effects

[0018] By using a high-efficiency composite wet electrostatic precipitator for steel rolling provided by the utility model, through the design of the air duct, the use of air guide plates and side cuts can evenly separate the flue gas entering from the air inlet into a plurality of compartments in the first air duct and the second air duct, so that the flue gas can drift upward relatively evenly, so that the air equalizing plate of the wet electrostatic precipitator can fully receive the flue gas, and the flue gas can be homogenized to the greatest extent before entering the anode and cathode systems for adsorption and dust reduction treatment, thereby improving the treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the air intake bin structure of the dust collector of the utility model;

[0020] Figure 2 This is a schematic structural diagram of a first embodiment of the air guide plate of the utility model;

[0021] Figure 3 This is a schematic structural diagram of a second embodiment of the air guide plate of the utility model;

[0022] Figure 4 This is a schematic diagram of the air intake bin structure of the utility model;

[0023] Figure 5This is a cross-sectional view of the air duct and air guide plate of the utility model;

[0024] Figure 6 This is a schematic diagram of the smoke flow direction of the utility model;

[0025] Figure 7 It is a schematic diagram of the structure of the air equalizing plate of the utility model.

[0026] Explanation of symbols in the figure

[0027] 1. Air inlet bin, 2. Air duct, 3. First air duct, 4. Second air duct, 5. Partition bin, 6. Side incision, 7. Air guide plate, 7a. Blocking part, 7b. Ventilation part, 7c. Ventilation hole, 7d. Baffle plate, 7e. Upper baffle plate, 7f. Mesh plate, 8. Air equalizing plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. As long as the effect of the utility model can be exerted, various changes can be made to the implementation scheme.

[0029] By those skilled in the art, the components in this case are connected in sequence. The specific connection and operation sequence should refer to the following working principle. The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process.

[0030] Reference Figure 1-7 A high-efficiency composite wet electrostatic precipitator for steel rolling according to the present embodiment is described;

[0031] In the existing electrostatic precipitator, the electrostatic precipitator includes a desulfurization tower and a wet electrostatic precipitator. The wet electrostatic precipitator includes an air intake bin 1, an air equalization plate, a cathode and anode system, and a spray flushing component.

[0032] In this embodiment, the air intake bin 1 has an air inlet for allowing flue gas to enter, and the air inlet is connected to the flue of the desulfurization tower; an air duct 2 connected to the air inlet is arranged in the air intake bin 1, and the flue gas flowing out of the desulfurization tower enters into the air duct 2, and the air duct 2 divides the air intake bin 1 into a first air duct 3 and a second air duct 4. The side wall of the air intake bin 1 is provided with a plurality of side cutouts 6 connected to the first air duct 3 and the second air duct 4, and the flue gas flowing in the air duct 2 enters into the first air duct 3 and the second air duct 4 through each side cutout 6.

[0033] In the above embodiment, the air inlet bin 1 is divided into two air ducts (the first air duct 3 and the second air duct 4) by the air duct 2, so that the smoke can flow in the air inlet bin 1 in a diverted manner; and through the design of a plurality of side cutouts 6, the smoke flowing in the air duct 2 can flow relatively evenly into the first air duct 3 and the second air duct 4. In addition, the smoke can flow upward relatively evenly to the gas equalizing plate for equalization, so that the gas can flow upward more evenly into the anode and cathode system for electrostatic adsorption and dust removal.

[0034] In order to improve the purpose of the above technical solution, an air guide piece 7 can be arranged in each side cutout 6, and the air guide piece 7 intercepts the smoke in the air duct 2 and guides it to the first air duct 3 and the second air duct 4. One end of the air guide piece 7 extends into the air duct 2 through the side cutout 6, and the other end is arranged in the first air duct 3 and the second air duct 4. There is a gap between the adjacent air guide pieces 7 on both sides of the air duct 2, and the gap gradually decreases along the direction of smoke flow.

[0035] The principle of setting the air guide pieces 7 is that when the smoke flows in the air duct 2 , it is blocked by the air guide pieces 7 on both sides of the air duct 2 , and the blocked smoke flows out of the side cutouts 6 along the wall surfaces of the air guide pieces 7 .

[0036] Furthermore, in the top view projection of the air duct 2, the air guides 7 on the left and right sides gradually approach each other from the air inlet direction to the tail end of the air duct 2. The advantage of adopting this setting method is that when smoke rushes into the air duct 2, the smoke will flow directly to the tail end of the air duct 2 due to inertia. At this time, the side cutout 6 close to the air inlet will emit the least smoke, and then the smoke output of each side cutout 6 will be different. In this way, the smoke volume in the front section and the tail section of the first air duct 3 and the second air duct 4 will be different. Therefore, a design method in which the gap between adjacent air guides 7 is gradually reduced is adopted, so that when the smoke enters from the air inlet and flows to each side cutout 6 in the air duct 2, it is ensured that the smoke flows out of the side cutout 6 along the wall of the air guide 7 after being blocked by the air guide 7.

[0037] The specific structure of the air guide plate 7 includes a blocking portion 7a, a ventilation portion 7b and a hollow portion. The blocking portion 7a extends into the air duct 2 along the side cutout 6 to block and intercept smoke. The blocking portion 7a is a curved plate; the curved surface design can facilitate the blocked and intercepted smoke to flow along the curved surface toward the side cutout 6. The ventilation portion 7b is fixed to the blocking portion 7a as a whole and is arranged in the first air duct 3 and the second air duct 4; the hollow portion is formed on the ventilation portion 7b so that the smoke can be evenly distributed in the first air duct 3 or the second air duct 4.

[0038] In this embodiment, two embodiments of the hollow portion are provided.

[0039] In the first embodiment, the hollow portion includes a ventilation hole 7c opened on the ventilation portion 7b, and a baffle 7d is fixed in the ventilation hole 7c. An internal angle a is formed between the baffle 7d and the ventilation portion 7b, 45°<α<90°. The ventilation hole 7c is a through hole opened on the ventilation portion 7b, and the cut plate can be used as the baffle 7d and is welded obliquely in the ventilation port 7c.

[0040] In the second embodiment, the hollow portion includes a mesh plate 7f. With this embodiment, the flow rate of smoke will be significantly greater than that of the open hole structure in the first embodiment.

[0041] In specific implementation, the hollow portion can be used in a combination of the first and second implementations.

[0042] The top of the air vent 7b extends upward to form an upper baffle 7e; a partition 5 is formed between two adjacent air guide plates 7 in the first air duct 3 and the second air duct 4, and an air equalizing plate 8 fixed to the upper baffle 7e is provided on the top of the partition 5.

[0043] The flue gas flowing out through the side cutout 6 is evenly distributed and drifts upward in each compartment 5 in the first air duct 3 and the second air duct 4. When drifting, it first passes through an independent air equalizing plate 8 and then drifts upward and converges, so that the flue gas can be evenly distributed in the air inlet bin 1 to the greatest extent, and then enters the air equalizing plate of the wet electrostatic precipitator itself to equalize the airflow, and then flows upward into the anode and cathode systems for electrostatic adsorption dust removal.

[0044] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency composite wet electrostatic precipitator for steel rolling, the electrostatic precipitator comprising an air intake bin (1), the air intake bin (1) having an air inlet for allowing smoke to enter, characterized in that: The air intake bin (1) is provided with an air duct (2) connected to the air intake port, the air duct (2) divides the air intake bin (1) into a first air duct (3) and a second air duct (4), the side wall surface of the air intake bin (1) is provided with a plurality of side cutouts (6) connected to the first air duct (3) and the second air duct (4), each of the side cutouts (6) is provided with an air guide plate (7), the air guide plate (7) intercepts the smoke in the air duct (2) and guides it into the first air duct (3) and the second air duct (4).

2. The high-efficiency composite wet electrostatic precipitator for steel rolling according to claim 1, characterized in that: One end of the air guide plate (7) passes through the side cutout (6) and extends into the air duct (2), and the other end is arranged in the first air duct (3) and the second air duct (4).

3. The high-efficiency composite wet electrostatic precipitator for steel rolling according to claim 2, characterized in that: There is a gap between the adjacent air guide plates (7) on both sides of the air duct (2), and the gap gradually decreases along the flow direction of the smoke.

4. A high-efficiency composite wet electrostatic precipitator for steel rolling according to any one of claims 1 to 3, characterized in that: The air guide piece (7) comprises: The blocking portion (7a) extends into the air duct (2) along the side cutout (6), and the blocking portion (7a) is a curved plate; The air-permeable portion (7b) is fixed to the blocking portion (7a) as a whole and is arranged in the first air duct (3) and the second air duct (4); A hollow portion is formed on the ventilation portion (7b).

5. The high-efficiency composite wet electrostatic precipitator for steel rolling according to claim 4, characterized in that: The hollow portion comprises a ventilation hole (7c) opened on the ventilation portion (7b), and a blocking piece (7d) is fixed in the ventilation hole (7c).

6. A high-efficiency composite wet electrostatic precipitator for steel rolling according to claim 5, characterized in that: An internal angle a is formed between the baffle (7d) and the air-permeable portion (7b), wherein 45°<α<90°.

7. The high-efficiency composite wet electrostatic precipitator for steel rolling according to claim 4, characterized in that: The hollow portion includes a mesh plate (7f).

8. The high-efficiency composite wet electrostatic precipitator for steel rolling according to claim 4, characterized in that: The top of the air-permeable portion (7b) extends upward to form an upper baffle (7e); a partition (5) is formed between two adjacent air guide plates (7) in the first air duct (3) and the second air duct (4); and an air equalizing plate (8) fixed to the upper baffle (7e) is provided on the top of the partition (5).

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