Flotation cell detection spraying defoaming device

Abstract

The utility model discloses a flotation cell detection spraying defoaming device which comprises a flotation cell, a laser detection device, a PLC (programmable logic controller) control module, a water inlet pipe, a spraying pipe and a control valve arranged on the water inlet pipe, and a sewer pipe is arranged at the bottom of the flotation cell. The laser detection device comprises a laser generator and a laser receiver, the laser generator and the laser receiver are installed on the two opposite sides of the side wall of the flotation tank respectively and located at the same installation height, and the laser receiver is connected with the PLC control module. The water inlet pipe is erected above the flotation tank, a plurality of spraying pipes communicated with the water inlet pipe are fixedly arranged below the water inlet pipe, and a spraying head is mounted at the bottom end of each spraying pipe; and the control valve is connected to a PLC (Programmable Logic Controller) control module. The automatic defoaming device is simple in structure, the flotation foam working condition is monitored in real time through the laser detection device, automatic defoaming operation is carried out on deposited foam in cooperation with the spraying pipe, the defoaming period can be effectively shortened, the spraying water consumption is reduced, cost is reduced, resources are saved, and the flotation defoaming effect is optimized.

Description

Technical Field

[0001] This utility model relates to the field of defoaming technology in coal flotation process, specifically to a flotation cell detection spray defoaming device. Background Technology

[0002] With the increasing demand for refined utilization of coal resources, flotation technology has become a key means to improve coal quality and recover clean coal. The flotation process is based on the differences in the physicochemical properties of the surfaces of coal and gangue. Using flotation reagents, coal particles selectively adhere to air bubbles, forming a foam layer that separates them from impurities such as gangue. However, on the one hand, excessive foam accumulation in the flotation cell not only occupies a large amount of space and hinders effective contact between subsequent coal particles and air bubbles, reducing flotation efficiency; on the other hand, the foam carries away some clean coal, causing unsanitary conditions and waste, and affecting safe production.

[0003] Currently, the main defoaming methods used domestically and internationally include natural defoaming, chemical defoaming, and physical defoaming. Natural defoaming has a lower cost but a longer defoaming cycle and is difficult to implement in confined spaces. Chemical defoaming can achieve rapid defoaming, but the use of defoaming agents not only increases production costs but also causes some pollution. Spray defoaming can effectively reduce froth buildup in flotation processes, but continuous spraying requires a large amount of water, resulting in water waste and increased water load. To better address the problem of difficult-to-eliminate clean coal foam in the flotation process and optimize the defoaming effect, it is urgent to develop a new spray defoaming technology to reduce the impact of existing problems on production operations. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of the existing technology and provide a flotation cell detection spray defoaming device.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a flotation cell detection spray defoaming device, including a flotation cell, a laser detection device, a PLC control module, a water inlet pipe, spray pipes, and a control valve installed on the water inlet pipe, wherein a drain pipe is provided at the bottom of the flotation cell; the laser detection device includes a laser generator and a laser receiver, which are respectively installed on two opposite sides of the side wall of the flotation cell at the same installation height, and the laser receiver is connected to the PLC control module; the water inlet pipe is erected above the flotation cell, and several spray pipes are fixedly installed below the water inlet pipe and connected to it, and a spray head is detachably installed at the bottom end of each spray pipe; the control valve on the water inlet pipe is connected to the PLC control module.

[0006] Furthermore, the laser generator is normally open, and the laser receiver receives a laser signal every 60 seconds. If the detected signal is weak or no signal is detected, the laser receiver sends a signal back to the PLC control module, and the PLC control module controls the control valve to open for spray defoaming.

[0007] Furthermore, each spray defoaming session lasts for 30 seconds.

[0008] Furthermore, the laser generator and laser receiver are installed at three-quarters of the height of the flotation cell.

[0009] Furthermore, the spray head has an umbrella-shaped structure, and the spray area diameter of each spray head is equal to the chord diameter of the flotation cell directly below it; the spray areas of any two adjacent spray heads overlap each other.

[0010] Furthermore, the diameter of the water inlet pipe is 50 mm and the water inlet pressure is 0.2 MPa; the diameter of the spray pipe is 10 mm.

[0011] Furthermore, the aforementioned laser detection device is provided in multiple sets, arranged at equal intervals along the circumference of the sidewall of the flotation cell. In each set of laser detection devices, the laser generator and laser receiver are arranged opposite each other, providing full coverage detection of the amount of foam at the same horizontal plane of the flotation cell.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention has a simple structure, monitors the flotation foam condition in real time through a laser detection device, and automatically defoams the accumulated foam with a spray pipe, which can effectively shorten the defoaming cycle, reduce the amount of spray water, reduce costs, save resources, and better solve the problem of eliminating clean coal foam in the flotation process, thus optimizing the flotation defoaming effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] In the diagram: 1. Flotation cell, 2. Laser generator, 3. Laser receiver, 4. PLC control module, 5. Water inlet pipe, 6. Spray pipe, 7. Spray head, 8. Control valve, 9. Drain pipe. Detailed Implementation

[0015] It should be noted that in the description of this utility model, terms such as "upper", "lower", "inner", "outer", "top", "bottom", "horizontal", and "vertical" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are only used to facilitate the description of the structural relationship between the components in this utility model and do not specifically mean that any component in this utility model must have a specific orientation, be constructed and operated in a specific orientation, or be construed as a limitation on this utility model.

[0016] It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0018] like Figure 1 As shown, a flotation cell detection spray defoaming device includes a flotation cell 1, a laser detection device, a PLC control module 4, a water inlet pipe 5, a spray pipe 6, and a control valve 8 located at the water inlet end of the water inlet pipe 5. The flotation cell 1 is funnel-shaped with an inverted trapezoidal longitudinal cross-section. The interior of the flotation cell 1 consists of an air layer, a foam layer, and a slurry layer from top to bottom. A drain pipe 9 is connected to the bottom center of the flotation cell 1. The laser detection device includes a matching laser generator 2 and a laser receiver 3, which are fixedly installed on two opposite sides of the inner wall of the flotation cell 1 at the same installation height. The laser receiver 3 is also connected to the PLC control module 4 via signal or line. According to actual production needs, the installation height of the laser generator 2 and the laser receiver 3 is three-quarters of the height of the entire flotation cell 1. The aforementioned inlet pipe 5 is installed above the flotation cell 1. Its diameter is 50mm, and the inlet pressure is 0.2MPa to ensure that the spray water volume and pressure meet the requirements for effective foam breaking. Several spaced-apart spray pipes 6 are fixedly installed at the bottom of the inlet pipe 5, connected in parallel and communicating with the inlet pipe 5. Each spray pipe 6 has a diameter of 10mm, and each spray pipe 6 has a detachable umbrella-shaped spray head 7 at its bottom. The spray area diameter of each spray head 7 is equal to the chord diameter of the flotation cell 1 directly below it, and the spray areas of any two adjacent spray heads 7 overlap. The control valve 8 on the inlet pipe 5 is also connected to the PLC control module 4 via signal or wiring, and is linked to the signal of the laser receiver 3.

[0019] In a further optimized technical solution, the aforementioned laser detection device is provided in multiple sets, which are arranged at equal intervals along the circumferential direction of the side wall of the flotation cell 1 and are all at the same height. The laser generator 2 and the laser receiver 3 are arranged opposite to each other to complete the full coverage detection of the amount of foam on the same horizontal plane in the flotation cell 1. At the same time, the outer side of the aforementioned laser generator 2 and laser receiver 3 is provided with a protective shell.

[0020] The specific working principle is as follows: The flotation clean coal, carrying a large number of air bubbles, enters the flotation cell 1. The laser generator 2 in the aforementioned laser detection device is normally open, and the laser receiver 3 receives a laser signal every 60 seconds. Under normal circumstances, the signal is stable. When the air bubbles in the flotation cell 1 accumulate to the height set by the laser generator 2, the detection signal received by the laser receiver 3 weakens or is no longer detected. When this occurs, the laser receiver 3 sends a real-time feedback signal to the aforementioned PLC control module 4. The PLC control module 4 then controls the opening of the control valve 8 on the aforementioned water inlet pipe 5, and the spray head 7 sprays pressurized water mist to break up and defoam. Each spray defoaming session lasts 30 seconds. The accumulated air bubbles are broken up under the impact of the high-speed water flow from the spray pipe 6. The broken gas overflows from the top of the flotation cell 1, and the broken solid-liquid two-phase mixture flows into the subsequent processing section through the drain pipe 9 at the bottom of the flotation cell 1.

[0021] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A froth flotation cell detection spray defoaming device, characterized by: The system includes a flotation cell, a laser detection device, a PLC control module, an inlet pipe, spray pipes, and a control valve mounted on the inlet pipe. The flotation cell has a drain pipe at its bottom. The laser detection device includes a laser generator and a laser receiver, which are installed on opposite sides of the flotation cell's sidewall at the same height. The laser receiver is connected to the PLC control module. The inlet pipe is positioned above the flotation cell, and several spray pipes are fixedly installed below and connected to it. Each spray pipe has a detachable spray head at its bottom. The control valve on the inlet pipe is connected to the PLC control module.

2. The flotation cell detection spray defoaming device according to claim 1, characterized in that: The laser generator is normally open, and the laser receiver receives a laser signal every 60 seconds. If the detected signal is weak or no signal is detected, the laser receiver sends a signal back to the PLC control module, which then controls the control valve to open for spray defoaming.

3. A froth flotation cell spray defoaming device as claimed in claim 2, wherein: Each spray defoaming session lasts 30 seconds.

4. The defoaming device for detecting the spraying of a flotation cell according to claim 1, characterized in that: The laser generator and laser receiver are installed at three-quarters of the height of the flotation cell.

5. The defoaming device for detecting the spraying of a flotation cell according to claim 1, characterized in that: The spray head has an umbrella-shaped structure, and the diameter of the spray area of ​​each spray head is equal to the chord diameter of the flotation cell directly below it; the spray areas of any two adjacent spray heads overlap each other.

6. The flotation cell detection spray defoaming device according to claim 1, characterized in that: The diameter of the water inlet pipe is 50 mm and the water inlet pressure is 0.2 MPa; the diameter of the spray pipe is 10 mm.

7. The defoaming device for detecting the spraying of a flotation cell according to claim 1, characterized in that: The aforementioned laser detection device is provided in multiple sets, arranged at equal intervals along the circumference of the sidewall of the flotation cell. In each set of laser detection devices, the laser generator and laser receiver are arranged opposite each other, providing full coverage detection of the amount of foam at the same horizontal plane of the flotation cell.

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