Accurate control device for liquid level of slag extractor

Abstract

The utility model discloses a slag extractor liquid level accurate control device which comprises an electrode type liquid level switch arranged in a slag extractor and a water supplementing pipe communicated with the slag extractor, a water supplementing electromagnetic valve is arranged on the water supplementing pipe, and the electrode type liquid level switch and the water supplementing electromagnetic valve are in linkage fit through a controller. A floating ball liquid level sensor is arranged in the slag extractor, a flow control valve is arranged on the water supplementing pipe, the floating ball liquid level sensor and the flow control valve are in linkage fit through a controller, an original electrode type liquid level switch is used for controlling opening and closing of a whole water supplementing body, the floating ball liquid level sensor is used for controlling the water supplementing inlet amount, and two-hand guarantee is achieved. The water is quickly replenished when the water is less, the water is slowly replenished when the water is more, the water replenishing process can be carried out all the time, the liquid level is controlled, and the water replenishing process can be closed when the water is too much, so that the safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of waste incineration power generation, in particular to a device for accurately controlling the liquid level of a slag discharger. Background Art

[0002] In a domestic waste incineration power plant, the liquid level control of a wet slag discharger is usually an electrode type liquid level switch. During operation, the water supply of the slag discharger is controlled according to the high and low levels of the electrode type liquid level in the water chamber of the slag discharger. Due to the complex slag discharging environment of the slag discharger, there are often impurities such as silt, which easily cause false alarms of high and low liquid levels. The operators cannot accurately monitor the liquid level of the slag discharger, which easily leads to excessive water supply or untimely water supply.

[0003] If the slag discharger is over-supplied with water and overflows, it will pollute the boiler zero-meter ground, and the overflow water will be discharged into the slag pit. During the transportation of slag with water, it will pollute the factory area road, resulting in environmental protection incidents.

[0004] If the water supply of the slag discharger is not timely, it will damage the water seal of the slag discharger and affect the negative pressure and temperature of the boiler furnace, thus affecting the normal combustion of the boiler.

[0005] Therefore, there is an urgent need for a device for accurately controlling the liquid level of a slag discharger. Summary of the Utility Model

[0006] The utility model provides a device for accurately controlling the liquid level of a slag discharger, aiming at solving the problems of unstable liquid level caused by excessive water supply and untimely water supply in the existing water supply process of the slag discharger, which affects the subsequent boiler combustion.

[0007] To solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A device for accurately controlling the liquid level of a slag discharger includes an electrode type liquid level switch arranged in the slag discharger and a water supply pipe communicated with the slag discharger. A water supply solenoid valve is arranged on the water supply pipe, and the electrode type liquid level switch and the water supply solenoid valve form a linkage cooperation through a controller;

[0009] A float type liquid level sensor is arranged in the slag discharger, a flow control valve is arranged on the water supply pipe, and the float type liquid level sensor and the flow control valve form a linkage cooperation through a controller.

[0010] Preferably, the flow control valve is arranged close to the slag discharger side, and the water supply solenoid valve is arranged far from the slag discharger side.

[0011] More preferably, an indicator light is arranged above the slag discharger, and the indicator light forms a linkage cooperation with the electrode type liquid level switch through a controller.

[0012] Furthermore, a night vision camera is arranged at the top inside the slag discharger, and the night vision camera is connected to an external display screen through a controller.

[0013] Furthermore, the photographic range of the night vision camera includes the liquid level, the float liquid level sensor and the electrode type liquid level switch.

[0014] Specifically, the controller is an external PLC controller.

[0015] Beneficial effects of the utility model:

[0016] 1. The original electrode-type liquid level switch is transformed into an early warning structure, which can give an alarm through the indicator light and control the overall switch of the water replenishment process through the controller;

[0017] 2. Add a float liquid level sensor to accurately monitor the liquid level in real time, and control the flow rate of the flow control valve through the controller according to the current liquid level, so as to meet the requirements of slow water replenishment when the liquid level is high and fast water replenishment when the liquid level is low. The water replenishment speed is adjusted in real time according to the liquid level, which is convenient for control and liquid level stability.

[0018] 3. The night vision camera can be used to observe the internal situation, including the operation of the liquid level, liquid level switch and sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a planar schematic diagram of the utility model;

[0020] In the figure: 1. Slag discharger; 2. Electrode type liquid level switch; 3. Water supply pipe; 4. Controller; 5. Water supply solenoid valve; 6. Flow control valve; 7. Float liquid level sensor; 8. Night vision camera; 9. Indicator light. DETAILED DESCRIPTION

[0021] As follows, embodiments are further described with reference to the accompanying drawings.

[0022] like Figure 1 As shown in FIG. 1 , as a preferred embodiment 1, a precise control device for the liquid level of a slag discharger comprises an electrode type liquid level switch 2 provided in the slag discharger 1 and a water supply pipe 3 connected to the slag discharger 1. The water supply pipe 3 is provided with a water supply solenoid valve 5. The electrode type liquid level switch 2 and the water supply solenoid valve 5 are linked together through a controller 4. The electrode type liquid level switch 2 is a fixed-point induction type with only two induction points, namely, a low water level and a high water level. When the set high water level is exceeded, that is, too much water is supplied, the water supply solenoid valve 5 is closed to stop supplying water. When the water level is lower than the high water level, the water supply solenoid valve 5 is kept open.

[0023] A float level sensor 7 is provided inside the slag discharger 1, and a flow control valve 6 is provided on the water replenishing pipe 3. The float level sensor 7 and the flow control valve 6 form a linkage cooperation through a controller 4. The liquid level is sensed in real time by the float level sensor 7, and the flow rate of the flow control valve 6 is adjusted according to the liquid level condition. When the liquid level is high, the water replenishing speed is slowed down, and when the liquid level is low, the water replenishing speed is increased, so as to facilitate controlling the liquid level within a suitable range. At the same time, as a second liquid level sensing mechanism, it makes up for the influence on the electrode type liquid level switch 2 caused by the environment such as sludge. If the liquid level exceeds the set upper limit, the flow control valve 6 will also be completely closed to prevent water replenishment.

[0024] The flow control valve 6 is arranged on one side close to the slag discharger 1, and the water replenishing solenoid valve 5 is arranged on one side far from the slag discharger 1, which is convenient for control and ensures the control effect of the flow rate.

[0025] As a preferred embodiment 2, an indicator light 9 is provided above the slag discharger 1. The indicator light 9 forms a linkage cooperation with the electrode type liquid level switch 2 through the controller 4, which is convenient for indicating high liquid level and low liquid level.

[0026] As a preferred embodiment 3, a night vision camera 8 is provided at the top inside the slag discharger 1. The night vision camera 8 is connected to an external display screen through the controller 4, which is convenient for observation in a closed and dark situation.

[0027] The photography range of the night vision camera 8 includes the liquid level, the float level sensor 7 and the electrode type liquid level switch 2, ensuring that the liquid level, the liquid level switch and the sensor can be observed.

[0028] The controller 4 is an external PLC controller, which is convenient for realizing automatic control.

[0029] The working principle of the present utility model:

[0030] The original electrode type liquid level switch 2 is transformed into an early warning structure, and an alarm can be given through the indicator light 9. At the same time, the overall switch of the water replenishing process, that is, the switch of the water replenishing solenoid valve 5, is controlled through the controller 4;

[0031] A float level sensor 7 is added to accurately monitor the liquid level in real time, and the flow rate of the flow control valve 6 is controlled in a linkage manner through the controller 4 according to the current liquid level, so as to meet the slow water replenishment when the liquid level is high and the fast water replenishment when the liquid level is low, and adjust the water replenishing speed in real time according to the liquid level, which is convenient for control and facilitates the stability of the liquid level;

[0032] The internal situation can be observed through the night vision camera 8, including observing the liquid level, the liquid level switch and the operation of the sensor.

Claims

1. A precise control device for the liquid level of a slag discharging machine, comprising an electrode type liquid level switch (2) arranged inside the slag discharging machine (1) and a water supply pipe (3) communicated with the slag discharging machine (1), characterized in that, A water replenishing electromagnetic valve (5) is provided on the water replenishing pipe (3), and the electrode type liquid level switch (2) and the water replenishing electromagnetic valve (5) form a linkage cooperation through the controller (4); A float type liquid level sensor (7) is provided in the slag discharger (1), a flow control valve (6) is provided on the water replenishing pipe (3), and the float type liquid level sensor (7) and the flow control valve (6) form a linkage cooperation through the controller (4).

2. The precise liquid level control device for slag discharge machine according to claim 1, characterized in that, The flow control valve (6) is arranged on one side close to the slag discharger (1), and the water replenishing electromagnetic valve (5) is arranged on one side far from the slag discharger (1).

3. The precise control device for the slag discharge machine liquid level according to claim 2, characterized in that, An indicator light (9) is provided above the slag discharger (1), and the indicator light (9) and the electrode type liquid level switch (2) form a linkage cooperation through the controller (4).

4. The precise control device for the slag discharge machine liquid level according to claim 3, wherein A night vision camera (8) is provided at the top inside the slag discharger (1), and the night vision camera (8) is connected to an external display screen through the controller (4).

5. The slag discharging machine liquid level precise control device according to claim 4, characterized in that, The shooting range of the night vision camera (8) includes the liquid level, the float type liquid level sensor (7) and the electrode type liquid level switch (2).

6. The slag discharging machine liquid level precise control device according to claim 5, characterized in that, The controller (4) is an externally connected PLC controller.

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