Control system of special inorganic ceramic membrane purification system for underground coal mine water

Abstract

The utility model discloses a control system of a special inorganic ceramic membrane purification system for underground coal mine water, a PLC (Programmable Logic Controller), a frequency converter and vacuum starters are respectively and independently arranged in an explosion-proof control box, the PLC is electrically connected with the frequency converter, the frequency converter is connected with a circulating water pump motor, the PLC is electrically connected with the vacuum starters, a plurality of vacuum starters are arranged, and the vacuum starters are electrically connected with the explosion-proof control box. Each vacuum starter is connected with a cleaning pump motor, the PLC is connected with a flow switch, a flow meter, a pressure sensor, a liquid level sensor and an electromagnetic pneumatic valve to collect data, the PLC is connected with an on-site operation table and an underground switch, the underground switch is connected with a ground upper computer, the ground upper computer is located in a ground dispatching room, and the ground dispatching room is connected with the PLC. The ground upper computer is connected with an external network, and remote control can be achieved through a mobile phone APP. The inorganic ceramic membrane purification system can be automatically operated, remotely monitored and remotely controlled on site, and unattended operation of the inorganic ceramic membrane purification system special for underground coal mine water is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of mine water treatment equipment, in particular to a control system of a special inorganic ceramic membrane purification system for underground coal mine water. Background Art

[0002] Underground coal mining consumes a large amount of water. During the underground coal mining process, a large amount of mine water will gush out from the underground. Due to the high content of impurities in the mine water, it cannot be used directly in coal mining and needs to be treated before use.

[0003] Generally speaking, coal mines will establish mine water treatment stations on the ground, and treat the mine water through a special inorganic ceramic membrane purification system to obtain clean water. Then, part of the clean water will be re-transported to various water use points underground in the coal mine, such as various coal mining faces, tunneling faces, drilling sites, and spray dust suppression in tunnels, for use in underground coal mine production.

[0004] The mine water treatment station on the ground includes a circulating water tank, a circulating water pump, an inorganic ceramic membrane purification device, and a clear water tank. To ensure the normal operation of the inorganic ceramic membrane purification device, a mechanical cleaning device and a chemical cleaning device are also installed. The working principle is as follows: the circulating water pump draws water from the circulating water tank and pumps it to the inorganic ceramic membrane purification device. A portion of the water is filtered through the inorganic ceramic membrane tubes in the inorganic ceramic membrane purification device to form clear water that flows into the clear water tank, and the remaining water returns to the circulating water tank through a pipe. After a period of filtration by the inorganic ceramic membrane tubes, some of the membrane pores on the inorganic ceramic membrane tubes will become clogged, resulting in a decrease in membrane flux. In this case, backflushing with a mechanical cleaning device can restore the membrane flux. However, backflushing with the mechanical cleaning device cannot completely remove the substances that clog the membrane pores. After long-term accumulation, the backflushing effect of the mechanical cleaning device decreases, and the membrane flux cannot be restored. At this time, the machine needs to be shut down for chemical cleaning to completely remove the substances that clog the membrane pores and restore the membrane flux of the inorganic ceramic membrane tubes.

[0005] However, pumping mine water from underground to the surface requires lifting transfer pumps and long-distance pipelines, which requires a large investment. In addition, the mine water transported contains a high content of impurities, and the pumps and pipelines are easily damaged, making the system maintenance workload very large. In addition, the deeper the mine, the greater the power consumption, which makes the mine water treatment cost very high.

[0006] Therefore, coal mines have such a demand, that is, to treat the mine water directly in the coal mine, directly transport it to various water use points in the coal mine, and transport the excess clean water to the ground for use, which can effectively reduce the water treatment cost.

[0007] Since the underground environment of coal mines is a special working environment, the labor intensity of each worker going down the mine is very high. In order not to increase the labor intensity of the underground workers, the inorganic ceramic membrane purification device for underground mine water in coal mines needs to be able to be unmanned and able to achieve remote monitoring. Utility Model Content

[0008] In view of this, the purpose of this utility model is to address the deficiencies in the existing technology and provide a control system for an inorganic ceramic membrane purification system for underground coal mine water. The control system is a part of the inorganic ceramic membrane purification system for underground coal mine water and can be automatically operated, remotely monitored, and controlled on-site and remotely to realize unmanned operation of the inorganic ceramic membrane purification system for underground coal mine water.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] A control system for an inorganic ceramic membrane purification system for underground coal mine water comprises an explosion-proof control box, a PLC, a frequency converter, a vacuum starter, a flow switch, a flow meter, a pressure sensor, a liquid level sensor, an electromagnetic pneumatic valve, an on-site operation console and an underground switch. The PLC, frequency converter and vacuum starter are each independently arranged in the explosion-proof control box. The PLC is electrically connected to the frequency converter, which is connected to a circulating water pump motor to control the start and stop and speed of the circulating water pump motor. The PLC is electrically connected to the vacuum starter. There are multiple vacuum starters, each of which is connected to a cleaning pump motor. The PLC is connected to the flow switch, the flow meter, the pressure sensor, the liquid level sensor and the electromagnetic pneumatic valve to collect data. The PLC is connected to the on-site operation console for on-site operation control. The PLC is connected to the underground switch, which is connected to a ground host computer. The ground host computer is located in a ground dispatching room and is used for ground remote control. The ground host computer is connected to an external network and can be remotely controlled through a mobile phone APP.

[0011] Furthermore, the PLC is powered by an AC127V power cable, and the AC127V power cable is provided with a comprehensive protection switch.

[0012] Furthermore, the cable that electrically connects the PLC to the frequency converter, vacuum starter, flow switch, flow meter, pressure sensor, liquid level sensor, electromagnetic pneumatic valve and on-site operating console is an AC127V communication cable.

[0013] Furthermore, the PLC is connected to an underground switch, and the underground switch is connected to a surface host computer via an optical fiber or a network cable.

[0014] Furthermore, the power cables of the frequency converter and the vacuum starter are AC660V or 1140V power cables.

[0015] Furthermore, the power cables connecting the frequency converter and the vacuum starter are each provided with a respective feed switch at the front end, and each of the feed switches is independently arranged in an explosion-proof control box.

[0016] In actual application, the control system of the inorganic ceramic membrane purification system for underground coal mine water of the utility model is used. The flow switch, flow meter, pressure sensor and liquid level sensor transmit the monitored data to the PLC in real time. The PLC accurately controls the various equipment and pipelines in the inorganic ceramic membrane purification system for underground coal mine water according to its own settings and the received data. The operator can view the real-time status of the system by operating the on-site host computer and perform corresponding control operations. At the same time, the PLC is connected to the ground host computer via optical fiber. The ground host computer is set in the ground dispatching room to realize ground control operations. At the same time, the ground host computer is connected to the external network and can be remotely controlled through a mobile phone APP or other terminals, thereby improving the intelligence level and management efficiency of the system.

[0017] The beneficial effects of the utility model are:

[0018] The utility model provides a control system for an inorganic ceramic membrane purification system for underground coal mine water. By installing an explosion-proof control box within an explosion-proof control cabinet, the explosion-proof safety of the control system is further improved, ensuring long-term stable operation in the special environment of underground coal mines.

[0019] The utility model provides a control system for an inorganic ceramic membrane purification system for underground coal mine water. The explosion-proof upper computer is arranged outside the explosion-proof control cabinet, so that monitoring and operation are separated from specific control components, thereby improving the safety of the control system and the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural diagram of the utility model.

[0021] Figure 2 This is a schematic diagram of the normal working of the inorganic ceramic membrane purification system for underground coal mine water during water treatment.

[0022] Figure 3 Schematic diagram of the mechanical cleaning operation of the inorganic ceramic membrane purification system for underground coal mine water.

[0023] Figure 4 Schematic diagram of the chemical cleaning operation of the inorganic ceramic membrane purification system for underground coal mine water.

[0024] In the figure: 1. Explosion-proof PLC control cabinet; 2. Explosion-proof control box; 3. Power supply; 4. PLC; 5. Motor relay; 6. Circulating water pump motor inverter; 7. Solenoid valve driver; 8. Inorganic ceramic membrane purification device; 9. Circulating water tank; 10. Clear water tank; 11. Mechanical cleaning tank; 12. Chemical cleaning tank; 13. Explosion-proof host computer. DETAILED DESCRIPTION

[0025] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0026] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various implementations, and the operational steps involved in each embodiment may be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a particular embodiment and do not imply a required composition and / or sequence.

[0027] Component numbers used herein, such as "first" and "second," are used solely to distinguish the components being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). Example

[0028] In this embodiment, although the underground coal mine water purification system is located underground, the circulating water tank and the clean water tank are constructed by repurposing portions of existing coal mine roadways, adapted to local conditions. These tanks are referred to as the circulating water roadway and the clean water roadway, respectively. These roadways may be at different depths than the roadway in which the equipment is located. Throughout this specification, these tanks will be referred to as the circulating water tank and the clean water tank for consistency with surface designations.

[0029] like Figure 1As shown, a control system for an inorganic ceramic membrane purification system for underground coal mine water includes an explosion-proof control box, a PLC, a frequency converter, a vacuum starter, a flow switch, a flow meter, a pressure sensor, a liquid level sensor, an electromagnetic pneumatic valve, an on-site operation console and an underground switch. The PLC, frequency converter and vacuum starter are each independently arranged in the explosion-proof control box. The PLC is electrically connected to the frequency converter, which is connected to a circulating water pump motor to control the start and stop and speed of the circulating water pump motor. The PLC is electrically connected to the vacuum starter. There are multiple vacuum starters, each of which is connected to a cleaning pump motor. The PLC is connected to the flow switch, flow meter, pressure sensor, liquid level sensor and electromagnetic pneumatic valve to collect data. The PLC is connected to the on-site operation console for on-site operation control. The PLC is connected to the underground switch, which is connected to a ground host computer. The ground host computer is located in a ground dispatching room and is used for ground remote control. The ground host computer is connected to the external network and can be remotely controlled through a mobile phone APP or other terminal.

[0030] The PLC is powered by an AC127V power cable, and a comprehensive protection switch is provided on the AC127V power cable.

[0031] The cable that electrically connects the PLC to the frequency converter, vacuum starter, flow switch, flow meter, pressure sensor, liquid level sensor, electromagnetic pneumatic valve and on-site operation console is an AC127V communication cable.

[0032] The PLC is connected to the downhole switch, and the downhole switch is connected to the surface host computer via an optical fiber or a network cable.

[0033] The power cables of the frequency converter and vacuum starter are AC660V or 1140V power cables.

[0034] The power cables connected to the frequency converter and the vacuum starter are each provided with a respective feed switch at the front end, and each feed switch is independently arranged in an explosion-proof control box.

[0035] like Figure 2 、 Figure 3 and Figure 4 As shown, the PLC in the explosion-proof control cabinet is connected to several sensors in the inorganic ceramic membrane purification system for mine water in the coal mine through explosion-proof cables. The sensors include water level sensors located in the circulating water tank and the clean water tank, a flow meter QL located at the clean water outlet of the inorganic ceramic membrane purification equipment, and a chemical cleaning flow control valve HLF located on the chemical cleaning pipeline.

[0036] In some necessary cases, the sensors also include voltage transformers and current transformers for powering the inorganic ceramic membrane purification system for underground coal mine water, as well as pressure sensors for detecting the water pressure in the inorganic ceramic membrane purification equipment, etc.

[0037] The solenoid valve driver 7 in the explosion-proof control cabinet is electrically connected to each solenoid pneumatic valve of the inorganic ceramic membrane purification system for mine water, that is, the solenoid valve driver is electrically connected to the solenoid pneumatic valve ZF1, the solenoid pneumatic valve ZF2, the solenoid pneumatic valve QF, the solenoid pneumatic valve WF, the solenoid pneumatic valve HF1 and the solenoid pneumatic valve FH2.

[0038] When the inorganic ceramic membrane purification system for mine water is operating normally, the circulating water pump motor ZB operates continuously, pumping mine water from the circulating water tank 9 to the inorganic ceramic membrane purification device 8. After permeation through the inorganic ceramic membrane purification device 8, clean water is produced and flows through the clean water pipeline into the clean water tank 10. The remaining concentrate is then returned to the circulating water tank 9 through the pipeline. During normal operation, the circulating water pump motor ZB operates continuously, and the solenoid pneumatic valves ZF1 and ZF2 on the main pipeline and JF on the clean water pipeline are always open to ensure smooth flow. The solenoid pneumatic valves on other pipelines are closed. Because clean water needs to be replenished in the mechanical cleaning tank 11, the mechanical cleaning water replenishment pump motor QB connected to the clean water pipeline operates continuously.

[0039] Since the inorganic ceramic membrane purification system for mine water requires mechanical cleaning every 3-120 minutes during normal operation, high-pressure water backwashing is required, and each cleaning lasts 10-120 seconds. Mechanical cleaning is frequent, but each cleaning session is brief. During mechanical cleaning, the clean water outlet is occupied. Therefore, during mechanical cleaning, the solenoid pneumatic valve JF on the clean water line is closed, while the solenoid pneumatic valve WF on the mechanical cleaning line is opened for mechanical cleaning. During the mechanical cleaning process, the main pump motor ZB and the solenoid pneumatic valves ZF1 and ZF2 on the main line remain open and do not need to be closed. Furthermore, the motor QB for the mechanical cleaning water supply pump connected to the clean water line remains operational.

[0040] The inorganic ceramic membrane purification system for mine water needs to be chemically cleaned once every month or so. At this time, the main pump motor ZB and the electromagnetic pneumatic valves ZF1 and ZF2 on the main pipe need to be closed, and the electromagnetic pneumatic valve JF on the clean water pipe also needs to be closed. The electromagnetic pneumatic valve HF1 and HF2 on the chemical cleaning pipe are opened, and at the same time, the chemical cleaning pump motor HB on the chemical cleaning pipe is started to allow the chemical liquid to flow and chemically clean the inorganic ceramic membrane purification device 8.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A control system for an inorganic ceramic membrane purification system for underground coal mine water, characterized by: It includes an explosion-proof control box, a PLC, a frequency converter, a vacuum starter, a flow switch, a flow meter, a pressure sensor, a liquid level sensor, an electromagnetic pneumatic valve, a field operation console and a downhole switch. The PLC, frequency converter and vacuum starter are each independently arranged in the explosion-proof control box. The PLC is electrically connected to the frequency converter, and the frequency converter is connected to the circulating water pump motor to control the start and stop and speed of the circulating water pump motor. The PLC is electrically connected to the vacuum starter. There are multiple vacuum starters, and each vacuum starter is connected to a cleaning pump motor. The PLC is connected to the flow switch, the flow meter, the pressure sensor, the liquid level sensor and the electromagnetic pneumatic valve. The PLC is connected to the field operation console for field operation control. The PLC is connected to the downhole switch, and the downhole switch is connected to the ground host computer. The ground host computer is located in the ground dispatching room and is used for ground remote control. The ground host computer is connected to the external network and can be remotely controlled through a mobile phone APP.

2. The control system of the inorganic ceramic membrane purification system for underground coal mine water according to claim 1 is characterized by: The PLC is powered by an AC127V power cable, and a comprehensive protection switch is provided on the AC127V power cable.

3. The control system of the inorganic ceramic membrane purification system for underground coal mine water according to claim 1 is characterized by: The cable that electrically connects the PLC to the frequency converter, vacuum starter, flow switch, flow meter, pressure sensor, liquid level sensor, electromagnetic pneumatic valve and on-site operation console is an AC127V communication cable.

4. The control system of the inorganic ceramic membrane purification system for underground coal mine water according to claim 1 is characterized by: The PLC is connected to the downhole switch, and the downhole switch is connected to the surface host computer via an optical fiber or a network cable.

5. The control system of the inorganic ceramic membrane purification system for underground coal mine water according to claim 1 is characterized by: The power cables of the frequency converter and vacuum starter are AC660V or 1140V power cables.

6. The control system of the inorganic ceramic membrane purification system for underground coal mine water according to claim 1 is characterized by: The power cables connected to the frequency converter and the vacuum starter are each provided with a respective feed switch at the front end, and each feed switch is independently arranged in an explosion-proof control box.

Images