Coal gasification underground pump house flood protection system

Abstract

The utility model discloses a kind of coal gasification underground pump house anti-flood protection systems, belong to safety protection technical field, including water-collecting pool, drainage submersible pump, four liquid level trigger switches, waterproof PLC module, central monitoring system and alarm unit;Water-collecting pool is set in the lowest place of underground pump house ground, drainage submersible pump is installed in water-collecting pool bottom, and its export is connected with external drainage ditch;Four liquid level trigger switches are respectively set in the corner of underground pump house, for detecting water level rise;Waterproof PLC module is electrically connected with four liquid level trigger switches respectively, central monitoring system is connected with waterproof PLC module by communication cable, and alarm unit is integrated in central monitoring system;When four liquid level trigger switches are simultaneously turned on, waterproof PLC module automatically starts drainage submersible pump and sends liquid level high alarm signal to central monitoring system.The utility model solves the equipment damage and production stagnation problem caused by pump house submergence.

Description

Technical Field

[0001] The utility model belongs to the technical field of safety protection, and particularly relates to an anti-flood protection system for an underground pump house in coal gasification, which is particularly suitable for the automatic monitoring of water leakage and emergency drainage of a pump house supporting a sedimentation tank. Background Technique

[0002] The sedimentation tank in the coal gasification plant needs to drain water through an underground pump house. However, the pump house is frequently flooded due to reasons such as water leakage from pumps and rainwater infiltration, resulting in motor damage and production interruption. The existing technology relies on manual inspections (once every 2 hours), and cannot respond to sudden water leakage in a timely manner. Although there is a liquid level alarm device, single-point detection is prone to false alarms / missing alarms, and there is a lack of an automatic drainage linkage mechanism. Content of the Utility Model

[0003] Technical problems to be solved: The utility model provides an anti-flood protection system for an underground pump house in coal gasification, and solves the problems of equipment damage and production stagnation caused by the flooding of the pump house.

[0004] Technical solution: An anti-flood protection system for an underground pump house in coal gasification described in the utility model includes:

[0005] A sump, which is arranged at the lowest point of the ground in the underground pump house and is used for collecting water leakage;

[0006] A drainage submersible pump, which is installed at the bottom of the sump, and its outlet is connected to an external drainage ditch;

[0007] Four liquid level trigger switches, which are respectively arranged at the corners in the underground pump house and are 5 cm above the ground, and are used for detecting the rising of the water level;

[0008] A waterproof PLC module, which is electrically connected to the four liquid level trigger switches respectively;

[0009] A central monitoring system, which is connected to the waterproof PLC module through a communication cable;

[0010] An alarm unit, which is integrated in the central monitoring system;

[0011] Among them, when the four liquid level trigger switches are simultaneously turned on, the waterproof PLC module automatically starts the drainage submersible pump and sends a high liquid level alarm signal to the central monitoring system.

[0012] Preferably, the liquid level trigger switch is a 12V contact switch, and an electrode type or a float type liquid level sensor is adopted.

[0013] Preferably, the volume of the sump is 0.5m×0.4m×0.5m, and the depth is greater than the installation height of the drainage submersible pump.

[0014] Preferably, the waterproof PLC module is provided with a manual / automatic switching function, and supports the inspection personnel to manually start the drainage submersible pump.

[0015] Preferably, the central monitoring system is a DCS system, and the alarm unit includes audible and visual alarms and pop-up prompts on the operation interface.

[0016] Preferably, the four liquid level trigger switches are respectively a first contact switch, a second contact switch, a third contact switch, and a fourth contact switch, and the first contact switch, the second contact switch, the third contact switch, and the fourth contact switch are respectively located at the four corners of the underground pump room;

[0017] Preferably, the water collection tank is located at the lowest point within the underground pump room area.

[0018] Preferably, the four liquid level trigger switches are a first contact switch, a second contact switch, a third contact switch, and a fourth contact switch, respectively, with the first contact switch and the second contact switch, and the third contact switch and the fourth contact switch respectively located at the two corners of the corresponding sides of the underground pump room.

[0019] Preferably, the water collection tank is located adjacent to the lowest point outside the underground pump room.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] This invention features a collection tank at the lowest point of the underground pump room to collect leaking water, and multiple liquid level detectors at the corners of the pump room to monitor the water level simultaneously, preventing malfunctions due to localized water accumulation. A waterproof PLC module receives signals from multiple liquid level switches; only when all switches are active is a serious leak detected, automatically activating the submersible pump to drain the water. This automatic drainage mechanism activates before the leak spreads, protecting the motor. Remote monitoring is possible, with alarm signals uploaded to the DCS system in real time, prompting operators to intervene, shortening troubleshooting time, and reducing inspection frequency. Manual operation is supported, ensuring system reliability and reducing motor maintenance costs by over 90%. The system is deployed within existing pump room space, making retrofitting difficult.

[0022] This invention also has other beneficial effects, which are described in the embodiments section of the specification and will not be repeated here. Attached Figure Description

[0023] Figure 1 Here is the control flowchart of the flood protection system for the underground pump room of coal gasification in Example 1;

[0024] Figure 2 This is a control flowchart of the flood protection system for the underground pumping station of coal gasification in Example 2.

[0025] Attached reference numerals: 1. Underground pump room; 2. First contact switch; 3. Second contact switch; 4. Third contact switch; 5. Fourth contact switch; 6. Water collection tank; 7. Submersible drainage pump; 8. Control valve; 9. Drainage ditch; 10. Waterproof PLC module; 11. Communication cable; 12. Central monitoring system. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings. Figures 1-2 The technical solutions of the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0027] Example 1: As Figure 1 As shown, this utility model discloses a flood protection system for an underground pumping station in a coal gasification plant, comprising a water collection tank 6, a submersible drainage pump 7, four liquid level trigger switches, a waterproof PLC module 10, a central monitoring system 12, and an alarm unit. The four liquid level trigger switches are designated as a first contact switch 2, a second contact switch 3, a third contact switch 4, and a fourth contact switch 5. These switches are respectively located at the four corners of the underground pumping station 1, 5cm above the ground. The liquid level switch activation threshold is 5cm (adjustable as needed), and they are used to detect water level rises. The water collection tank 6 is located at the lowest point within the underground pump room 1 to collect leaking water. The volume of the water collection tank 6 is 0.5m×0.4m×0.5m. The drainage submersible pump 7 is installed at the bottom of the water collection tank 6. The drainage capacity of the submersible pump is ≥10m³ / h (matching the volume of the water collection tank). The depth of the water collection tank 6 is greater than the installation height of the drainage submersible pump 7. The outlet of the drainage submersible pump 7 is connected to the external drainage ditch 9, and the connection pipe is connected to the control valve 8 to control the sewage discharge.

[0028] The waterproof PLC module 10 is electrically connected to the first contact switch 2, the second contact switch 3, the third contact switch 4, and the fourth contact switch 5, respectively. When any switch fails, the waterproof PLC module automatically switches to a three-switch or logic mode and triggers a maintenance alarm. The central monitoring system 12 is connected to the waterproof PLC module 10 via a communication cable 11. The alarm unit is integrated into the central monitoring system 12. When all four liquid level trigger switches are turned on simultaneously, the waterproof PLC module 10 automatically starts the submersible drainage pump 7 and sends a high liquid level alarm signal to the central monitoring system 12.

[0029] In one specific embodiment, the four liquid level trigger switches are 12V contact switches, employing electrode-type or float-type liquid level sensors. The liquid level trigger switches use a safe DC 12V voltage to avoid electrolytic corrosion. Multiple liquid level detectors are installed in the corners of the underground pump room to synchronously monitor the water level, preventing malfunctions due to localized water accumulation. The waterproof PLC module receives signals from the multiple liquid level switches; only when all switches are active is it determined to be a serious leak, automatically activating the submersible pump to drain the water. This automatic drainage mechanism is activated before the leak spreads, protecting the motor.

[0030] In one specific embodiment, the waterproof PLC module 10 is equipped with a manual / automatic switching function, and the response delay of the PLC module is <2s; it supports the manual start of the drainage submersible pump 7 by the inspection personnel, further ensuring the reliability of the system and reducing motor maintenance costs by more than 90%.

[0031] In one specific embodiment, the central monitoring system 12 is a DCS system. The DCS system can record the number of alarms and their duration for analyzing leakage patterns. The alarm unit includes audible and visual alarms and pop-up prompts on the operation interface. The alarm signal is uploaded to the DCS system in real time to prompt operators to intervene, shorten fault handling time, and reduce the frequency of inspections.

[0032] Example 2: As Figure 2 As shown, the main difference from Embodiment 1 is that in this embodiment, the four liquid level trigger switches are respectively the first contact switch 2, the second contact switch 3, the third contact switch 4, and the fourth contact switch 5. The first contact switch 2 and the second contact switch 3, and the third contact switch 4 and the fourth contact switch 5 are respectively located at the two corners of the corresponding sides of the underground pump room 1 (e.g., Figure 2 As shown, the water collection tank 6 is located at the lowest point outside the underground pump room 1, in a scenario where the space in the underground pump room 1 is small and it is difficult to excavate the water collection tank 6.

[0033] The working mode of the underground pump room flood protection system of this utility model:

[0034] 1. Minor water leakage in the underground pump room: The water flowed into the collection tank 6, and the inspection personnel manually started the drainage submersible pump 7;

[0035] 2. Excessive water leakage in the underground pump room: The water level overflows the liquid level trigger switch in the corner of underground pump room 1 → PLC detects four conduction signals → automatically starts the drainage submersible pump to drain water, and at the same time sends a "high liquid level" alarm to the DCS system → operators investigate the source of the leak on site.

[0036] The above are preferred embodiments of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A flood protection system for underground pumping stations in coal gasification plants, characterized in that, include: A water collection tank (6) is located at the lowest point of the underground pump room (1) to collect leaking water; A submersible pump (7) is installed at the bottom of the collection tank (6), and its outlet is connected to an external drainage ditch (9). Four liquid level trigger switches are respectively set in the corner of the underground pump room (1) and 5cm above the ground to detect the rise of water level; The waterproof PLC module (10) is electrically connected to four liquid level trigger switches respectively; The central monitoring system (12) is connected to the waterproof PLC module (10) via a communication cable (11); The alarm unit is integrated into the central monitoring system (12); When all four liquid level trigger switches are turned on at the same time, the waterproof PLC module (10) automatically starts the drainage submersible pump (7) and sends a high liquid level alarm signal to the central monitoring system (12).

2. The flood protection system for underground pumping stations in coal gasification as described in claim 1, characterized in that, The liquid level trigger switch is a 12V contact switch and uses an electrode-type or float-type liquid level sensor.

3. The flood protection system for underground pumping stations in coal gasification as described in claim 1, characterized in that, The water collection tank (6) has a volume of 0.5m×0.4m×0.5m and a depth greater than the installation height of the submersible pump (7).

4. The flood protection system for underground pumping stations in coal gasification according to claim 1, characterized in that, The waterproof PLC module (10) is equipped with a manual / automatic switching function, which allows inspection personnel to manually start the drainage submersible pump (7).

5. The flood protection system for underground pumping stations in coal gasification according to claim 1, characterized in that, The central monitoring system (12) is a DCS system, and the alarm unit includes audible and visual alarms and pop-up prompts on the operation interface.

6. The flood protection system for underground pumping stations in coal gasification facilities according to any one of claims 1-5, characterized in that, The four liquid level trigger switches are the first contact switch (2), the second contact switch (3), the third contact switch (4), and the fourth contact switch (5). The first contact switch (2), the second contact switch (3), the third contact switch (4), and the fourth contact switch (5) are respectively located at the four corners of the underground pump room (1).

7. The flood protection system for underground pumping stations in coal gasification according to claim 6, characterized in that, The water collection tank (6) is located at the lowest point within the area of ​​the underground pump room (1).

8. The flood protection system for underground pumping stations in coal gasification facilities according to any one of claims 1-5, characterized in that, The four liquid level trigger switches are the first contact switch (2), the second contact switch (3), the third contact switch (4), and the fourth contact switch (5). The first contact switch (2) and the second contact switch (3), the third contact switch (4) and the fourth contact switch (5) are respectively set at the two corners of the corresponding side of the underground pump room (1).

9. The flood protection system for underground pumping stations in coal gasification according to claim 8, characterized in that, The water collection tank (6) is located adjacent to the lowest point outside the range of the underground pump room (1).

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