Dust-containing waste gas washing device and use method thereof

Abstract

The present invention discloses a washing device for dust-containing exhaust gas and a method for using the same, comprising: a dust collecting hood; an air intake duct, one end of which is connected to the dust collecting hood, and the air intake duct is in a zigzag shape; an anti-blocking mechanism, which is arranged at the common end of the zigzag shape to prevent dust from accumulating there; and a power wave scrubber, which is connected to the other end of the air intake duct. The beneficial effects of the present invention are that wet ash can be prevented from accumulating in the air intake duct through the design of the zigzag-shaped air intake duct, and wet ash can be prevented from accumulating at the highest point and the lowest point through the design of the anti-blocking mechanism at the highest point and the lowest point of each zigzag line.

Description

Technical Field

[0001] The invention relates to the washing and purification of dust-collecting tail gas in a wet process environment of pyrite acid-making industry, and in particular to a washing device for dust-containing waste gas and a use method thereof. Background Art

[0002] In the pyrite acid production industry, it is usually necessary to send the ore into the roasting furnace for high-temperature roasting. The high-temperature slag obtained after roasting is cooled by a slag cooler, a humidifier, etc., and then transported to the slag storage by a belt conveyor. In the process of cooling, humidifying or conveying the slag, dust is easily raised on site due to factors such as poor sealing of the connection parts, insufficient negative pressure of the slag cooler or humidifier, and slag slipping during the belt transfer. In order to ensure environmental protection and 5S on site, it is usually necessary to collect and manage these leaked or escaped dusts. Since these leaked or escaped dusts include both dry ash and wet ash containing water vapor, dry dust collection cannot be used. General wet dust collection is prone to equipment or pipeline blockage, resulting in poor use effect.

[0003] For example, Chinese utility model patent publication number CN218221703U discloses a multi-level treatment system for high-temperature dust-containing exhaust gas, which includes: an exhaust gas treatment system, including a flue gas-flue gas reheater, a pre-spraying device, a supergravity purifier, a spray washing tower, and a wet electric precipitator purifier connected in sequence; a circulating water reuse system, including a solid-liquid separation circulating water tank, and the polluted wastewater inlet of the solid-liquid separation circulating water tank is connected to the pre-spraying device, the supergravity purifier, the spray washing tower, and the wet electric precipitator purifier through pipelines. The system treats high-temperature flue gas and does not have the problem of wet ash accumulation and clogging. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing dust-containing exhaust gas contains wet ash, which will accumulate and clog the pipeline. For this purpose, a dust-containing exhaust gas washing device and a use method thereof are provided.

[0005] The technical solution of the present invention is: a washing device for dust-containing exhaust gas, comprising: a dust hood; an air intake duct, one end of which is connected to the dust hood, and the air intake duct is in a zigzag shape; an anti-blocking mechanism, which is arranged at the common end of the zigzag shape to prevent dust from accumulating there; and a dynamic wave scrubber, which is connected to the other end of the air intake duct.

[0006] The anti-blocking mechanism in the above scheme includes: a fan, which is fixed at the highest point and the lowest point of each segment of the broken line; an air supply pipe, which is connected to the highest point and the lowest point of each segment of the line; an end cover, the air supply pipe is connected to the fan through the end cover, and a plurality of ventilation holes are provided on the end cover; a tension spring, one end of the tension spring is fixedly connected to the center of the end cover; a telescopic block, the telescopic block is located in the air supply pipe and a gap is left between the telescopic block and the air supply pipe, and one end of the telescopic block is fixedly connected to the other end of the tension spring.

[0007] An improvement of the above solution is that a plurality of first raised portions are provided on the inner wall of the air supply pipe, and a clearance fit is formed between the first raised portions and the telescopic blocks.

[0008] A further improvement of the above solution is that a plurality of second raised portions which are staggered with the first raised portions are distributed on the outer wall of the telescopic block.

[0009] The common end of the broken line in the above solution is a flexible pipe, and the connecting line of the broken line is a rigid pipe.

[0010] The flexible pipe in the above solution is a corrugated pipe.

[0011] The method for using the dust-containing exhaust gas washing device includes the following steps: the dust collected from each collection point is sucked out through the dust collecting hood, enters the air intake duct together with the surrounding air and is collected at the air intake duct, the anti-blocking mechanism is started to periodically clear the passing dust, and the dust is input into the dynamic wave scrubber through the air intake duct for washing.

[0012] Another method of using a dust-containing exhaust gas washing device includes the following steps: the dust collected from each collection point is sucked in through a dust collecting hood, enters the air intake duct together with the surrounding air and is collected at the air intake duct, the fan is started to supply air, the air enters through the ventilation holes of the end cover, part of the air pushes the telescopic block into the air intake duct, and part of the air is blown into the air intake duct from the gap between the telescopic block and the air supply pipe, the passing dust is periodically cleared, and the dust is input into the dynamic wave scrubber through the air intake duct for washing.

[0013] The beneficial effects of the present invention are that the zigzag air intake duct design can prevent wet ash from accumulating in the air intake duct, and the anti-blocking mechanism is designed at the highest point and the lowest point of each zigzag line to prevent wet ash from accumulating at the highest point and the lowest point. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of a dust-containing waste gas washing device of the present invention;

[0015] Figure 2 It is a schematic diagram of the coordination between the anti-blocking mechanism and the air intake pipe of the present invention;

[0016] Figure 3 yes Figure 2 Schematic diagram of anti-blocking mechanism;

[0017] Figure 4 is a schematic diagram of an anti-blocking mechanism of a preferred example of the present invention;

[0018] In the figure, 1. dust collecting hood, 2. air inlet duct, 3. anti-blocking mechanism, 31. fan, 32. air supply duct, 33. end cover, 34. ventilation hole, 35. tension spring, 36. telescopic block, 37. first raised part, 38. second raised part, 4. dynamic wave scrubber, 5. induced draft fan, 6. exhaust pipe. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments by ordinary technicians in this field without creative work are within the protection scope of the present invention.

[0020] like Figure 1 As shown, the dust-containing exhaust gas washing device comprises: a dust hood 1; an air intake pipe 2, one end of which is connected to the dust hood, and the air intake pipe is in a zigzag shape; an anti-blocking mechanism 3, which is arranged at the common end of the zigzag shape to prevent dust from accumulating there; and a dynamic wave scrubber 4, which is connected to the other end of the air intake pipe. The clean exhaust gas after washing is extracted and discharged by the induced draft fan 5 through the exhaust pipe 6, and the dust enters the circulating liquid and is discharged to the sewage treatment station for treatment through regular sewage discharge. In order to reduce the accumulation of dust in the air intake pipe, the air intake pipe is arranged in a zigzag shape. The zigzag line is a figure formed by connecting several points (called endpoints) that are not on a straight line in sequence with line segments (each common end is connected by at most two line segments). The anti-blocking mechanism can be a water flushing port and a sewage outlet. Specifically, a water flushing port is set at the highest point of each zigzag line, and a sewage outlet is set at the lowest point of each zigzag line, so as to facilitate the daily flushing of the air intake pipe and avoid blockage of the air intake pipe.

[0021] As an embodiment of the present invention, Figure 2-3As shown, the anti-blocking mechanism includes: a fan 31, which is fixed at the highest point and the lowest point of each segment of the broken line; an air supply pipe 32, which is connected to the highest point and the lowest point of each segment of the line; an end cover 33, through which the air supply pipe is connected to the fan, and a plurality of ventilation holes 34 are provided on the end cover; a tension spring 35, one end of which is fixedly connected to the center of the end cover; a telescopic block 36, which is located in the air supply pipe and has a gap between the air supply pipe and the end of which is fixedly connected to the other end of the tension spring. When the fan is working, it will supply air to the air supply pipe, and the supplied air will enter the air supply pipe through the ventilation holes on the end cover, pushing the telescopic block into the air intake pipe, and at the same time, part of the air will enter the air intake pipe from the gap between the telescopic block and the air supply pipe. After being compressed, the air enters the air intake pipe, and has enough power to push the wet ash in the air intake pipe to prevent the wet ash from accumulating. When the air is discharged from the air supply pipe, it will be guided by the telescopic block and quickly diffused in the air intake pipe to avoid cleaning dead corners. When the telescopic block extends into the air intake pipe for a certain distance, the tension of the tension spring is greater than the thrust of the air, pulling the telescopic block back into the air supply pipe, and repeating this process.

[0022] As an embodiment of the present invention, the inner wall of the air supply pipe is provided with a plurality of first raised portions 37, and the first raised portions are gap-matched with the telescopic block. The first raised portions may be a plurality of first raised portions with the same shape or a plurality of first raised portions with inconsistent shapes, thereby increasing the effect of airflow disturbance and making the airflow sent from the air supply pipe into the air intake pipe flow irregularly.

[0023] The method for using the dust-containing exhaust gas washing device includes the following steps: the dust collected from each collection point is sucked and induced by the dust collecting hood, enters the air intake duct together with the surrounding air and is collected at the air intake duct, the fan is started to supply air, the air supply enters through the ventilation holes of the end cover, part of the air supply pushes the telescopic block into the air intake duct, and part of the air supply is blown into the air intake duct from the gap between the telescopic block and the air supply pipe, the passing dust is periodically cleared, and the dust is input into the dynamic wave scrubber through the air intake duct for washing.

[0024] As a preferred example of the present invention, Figure 4 As shown, the outer wall of the telescopic block is provided with a plurality of second raised portions 38 staggered with the first raised portions. When the telescopic portion moves, the second raised portions and the first raised portions stagger each other, thereby changing the airflow direction in the air supply duct and reducing air supply dead angles for a better effect.

[0025] The common end of the zigzag line in the present invention is a flexible pipe, preferably a corrugated pipe, and the connecting line of the zigzag line is a rigid pipe. Of course, the common end can also be a rigid pipe. The anti-blocking mechanism is fixed on the fixing member.

Claims

1. A dust-containing waste gas washing device, characterized in that it comprises: A dust collecting hood (1); an air intake duct (2), one end of the air intake duct being connected to the dust collecting hood, the air intake duct being in a zigzag shape; an anti-blocking mechanism (3), the anti-blocking mechanism being arranged at a common end of the zigzag shape and being used to prevent dust from accumulating therein; a power wave scrubber (4), the power wave scrubber being connected to the other end of the air intake duct; the anti-blocking mechanism comprising: a fan (31), the fan being fixed at the highest point and the lowest point of each segment of the zigzag shape; an air supply pipe (32), the air supply pipe being connected to the highest point and the lowest point of each segment of the zigzag shape; an end cover (33), the air supply pipe being connected to the fan via the end cover, the end cover being provided with a plurality of ventilation holes (34); a tension spring (35), one end of the tension spring being fixedly connected to the center of the end cover; and a telescopic block (36), the telescopic block being located in the air supply pipe and leaving a gap between the telescopic block and the air supply pipe, one end of the telescopic block being fixedly connected to the other end of the tension spring.

2. The dust-containing waste gas washing device according to claim 1, characterized in that: The inner wall of the air supply pipe is provided with a plurality of first raised portions (37), and the first raised portions are clearance-matched with the telescopic blocks.

3. The dust-containing waste gas washing device according to claim 2, characterized in that: The outer wall of the telescopic block (36) is provided with a plurality of second raised portions (38) which are distributed in an alternating manner with the first raised portions.

4. The dust-containing waste gas washing device according to claim 1, characterized in that: The common end of the zigzag line is a flexible pipe, and the connecting line of the zigzag line is a rigid pipe.

5. The dust-containing waste gas washing device according to claim 4, characterized in that: The flexible pipe is a corrugated pipe.

6. The method for using the dust-containing waste gas washing device according to claim 1, characterized in that: The following steps are involved: The dust collected from each collection point is drawn in by the dust collecting hood (1) and enters the air intake duct together with the surrounding air and is collected at the air intake duct. The anti-blocking mechanism (3) is activated to periodically clear the passing dust, and the dust is input into the dynamic wave scrubber (4) for washing through the air intake duct.

7. The method for using the dust-containing waste gas washing device according to claim 1, characterized in that: The following steps are involved: The dust collected from each collection point is drawn in by the dust collecting hood (1) and enters the air intake duct together with the surrounding air and is collected at the air intake duct. The fan (31) is started to supply air. The air enters through the ventilation hole (34) of the end cover. Part of the air pushes the telescopic block (36) into the air intake duct (2), and part of the air is blown into the air intake duct from the gap between the telescopic block and the air supply pipe (32). The dust passing through is periodically cleared and the dust is input into the power wave scrubber (4) for washing through the air intake duct.

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