Cooling device for power station of scraper type slag salvaging machine

Abstract

The utility model provides a cooling device for a power station of a scraper type submerged chain conveyor, which aims to solve the problem of tripping of the submerged chain conveyor caused by over-high oil temperature of a power oil station of the submerged chain conveyor due to insufficient cooling water amount of the power station of the scraper type submerged chain conveyor of a coal-fired unit, and comprises an oil pump, a hydraulic motor, a cooler and an oil station oil tank which are connected in sequence, a cooling pipeline is arranged in the oil station oil tank and connected with an industrial cooling water pipeline and a closed cooling water system in parallel, and the industrial cooling water pipeline comprises an industrial cooling water supply pipe and an industrial cooling water drainage pipe which are both provided with switch valves. The two ends of the closed cooling water supply pipe are connected with a water inlet of the cooling pipeline and a water outlet of the unit closed cooling water system respectively, the two ends of the closed cooling water return pipe are connected with a water return port of the cooling pipeline and a water return port of the unit closed cooling water system respectively, and control valves are arranged on the closed cooling water supply pipe and the closed cooling water return pipe respectively. The device effectively solves the problems of insufficient cooling water amount and poor cooling effect of the coal-fired unit submerged scraper conveyor power station.

Description

Technical Field

[0001] This utility model relates to the field of thermal power plant technology, and in particular to a cooling device for the power station of a scraper-type slag remover. Background Technology

[0002] The ash remover in the boiler ash system is an extremely important piece of equipment for coal-fired boilers in large and medium-sized thermal power plants, directly affecting the quality of boiler combustion and the economic efficiency of unit operation. Insufficient cooling water in the power station of the scraper ash remover in a coal-fired unit can easily lead to excessively high oil temperature in the power oil station, causing the ash remover to trip and affecting the safe operation of the boiler.

[0003] Currently, most power plant boiler scraper slag removers use industrial water for heat exchange and direct discharge for cooling. This can lead to insufficient industrial water pressure and poor heat exchange, causing the oil temperature in the slag remover's power oil station to be too high, resulting in the slag remover tripping and affecting the safe operation of the boiler. Utility Model Content

[0004] This utility model provides a cooling device for the power station of a scraper-type slag remover, to solve the technical problem of insufficient cooling water in the power station of a coal-fired unit scraper-type slag remover, which leads to excessively high oil temperature in the slag remover's power oil station and causes the slag remover to trip. To achieve the above objective, the technical solution adopted is as follows:

[0005] A cooling device for the power station of a scraper-type slag remover includes an oil pump, a hydraulic motor, a cooler, and an oil tank connected in sequence. The oil pump inlet is connected to the oil tank outlet, and the cooler outlet is connected to the oil tank inlet. The oil tank is characterized by having a cooling pipeline installed inside. The cooling pipeline has an inlet and an outlet connected to an industrial cooling water supply pipe and an industrial cooling water drain pipe, respectively. The inlet of the industrial cooling water supply pipe is connected to industrial water.

[0006] It also includes a closed-loop cooling water supply pipe and a closed-loop cooling water return pipe. The two ends of the closed-loop cooling water supply pipe are connected to the inlet of the cooling pipeline and the outlet of the unit's closed-loop cooling water system, respectively. The two ends of the closed-loop cooling water return pipe are connected to the return outlet of the cooling pipeline and the return outlet of the unit's closed-loop cooling water system, respectively.

[0007] Furthermore, both the industrial cooling water supply pipe and the first cooling water return pipe are equipped with switch valves, and both the closed cooling water supply pipe and the closed cooling water return pipe are equipped with control valves.

[0008] Furthermore, temperature sensors are installed on the oil tank, cooling pipe inlet and outlet of the gas station.

[0009] Furthermore, pressure sensors are installed at the inlet and outlet of the cooling pipe.

[0010] Furthermore, it also includes a control system, which includes a controller. The temperature sensor and pressure sensor are both connected to the signal input terminal of the controller, and the switching valve and control valve are both connected to the signal output terminal of the controller.

[0011] Furthermore, the inlet of the cooling pipeline is connected to a Y-type filter, and the two inlets of the Y-type filter are respectively connected to an industrial cooling water supply pipe and a closed cooling water supply pipe.

[0012] Furthermore, an alarm is also connected to the signal output terminal of the controller.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The industrial water cooling pipeline is used in parallel with the closed cooling water system. When the industrial water pressure is insufficient or the heat exchange effect is poor, switch to the closed cooling water system for heat exchange to avoid the problem of the slag remover tripping due to excessive oil temperature in the power oil station.

[0015] 2. By adding pressure and temperature sensors to the cooling pipes, the operating status of the cooling pipes can be monitored in real time;

[0016] 3. A Y-type filter is installed at one end of the cooling pipe inlet to filter the cooling water of the industrial water cooling pipe and the closed cooling water system. Since the industrial water is prone to impurities adhering to the cooling pipe during industrial cooling circuit cooling, the Y-type filter can filter the industrial cooling water. When switching to the closed cooling water circuit, it prevents impurities in the cooling pipe from entering the closed cooling water circulation system, thereby improving the service life of the closed cooling water system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present utility model.

[0018] Figure 2 This is a schematic diagram of the control system of this utility model.

[0019] in:

[0020] 1-Oil station tank, 2-Oil pump, 3-Hydraulic motor, 4-Cooler, 5-Cooling pipe, 6-First temperature sensor, 7-Industrial cooling water supply pipe, 8-Industrial cooling water drain pipe, 9-Pressure sensor, 10-Second temperature sensor, 11-Third temperature sensor, 12-Closed cooling water supply pipe, 13-Closed cooling water return pipe, 14-First switching valve, 15-Second switching valve, 16-First control valve, 17-Second control valve, 18-Y-type filter, 19-Controller, 20-Alarm. Detailed Implementation

[0021] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0022] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the view direction or positional relationship, and are only for the convenience of describing the utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model.

[0023] like Figures 1-2 The cooling device of the power station of the scraper slag remover shown includes an oil tank 1, an oil pump 2, a hydraulic motor 3, and a cooler 4 connected in sequence. The oil inlet of the oil pump 2 is connected to the oil outlet of the oil tank 1, and the oil outlet of the cooler 4 is connected to the oil inlet of the oil tank 1. A cooling pipe 5 is provided in the cooler 4, and the cooling pipe 5 is connected in parallel to an industrial water cooling pipe and a closed cooling water circuit.

[0024] Specifically, the industrial water cooling pipeline includes an industrial cooling water supply pipe 7 and an industrial cooling water drain pipe 8 connected to the inlet and outlet of the cooling pipeline 5, respectively. The industrial cooling water drain pipe 8 is connected to an external wastewater collection device. The closed cooling water circuit includes a closed cooling water supply pipe 12 and a closed cooling water return pipe 13 connected to the inlet and outlet of the cooling pipeline 5, respectively. The industrial cooling water supply pipe 7 and the closed cooling water supply pipe 12 are connected in parallel to one end of the inlet of the cooling pipeline 5, and the industrial cooling water drain pipe 8 and the closed cooling water return pipe 13 are connected in parallel to one end of the outlet of the cooling pipeline 5. A first switch valve 14 and a second switch valve 15 are respectively installed on the industrial cooling water supply pipe 7 and the industrial cooling water drain pipe 8, and a first control valve 16 and a second control valve 17 are respectively installed on the closed cooling water supply pipe 12 and the closed cooling water return pipe 13.

[0025] A first temperature sensor 6 is installed in the oil tank 1 of the gas station. A second temperature sensor 10 and a third temperature sensor 11 are respectively installed at one end of the water inlet and one end of the water outlet of the cooling pipe 5. A pressure sensor 9 is also installed at one end of the water inlet of the cooling pipe 5.

[0026] The device also includes a control system, which includes a controller 19 and an alarm 20. The first temperature sensor 6, the second temperature sensor 10, the third temperature sensor 11 and the pressure sensor 9 are all connected to the signal input terminal of the controller 19. The first switching valve 14, the second switching valve 15, the first control valve 16, the second control valve 17 and the alarm 20 are all connected to the signal output terminal of the controller 19. The alarm 20 is an audible and visual alarm.

[0027] In addition, a Y-type filter 18 is connected to one end of the inlet of the cooling pipe 5. The Y-type filter 18 has two inlets and one outlet. The two inlets are connected to the industrial cooling water supply pipe 7 and the closed cooling water supply pipe 12, respectively. When using industrial water for cooling under normal conditions, impurities in the industrial water are easy to adhere to the inner wall of the cooling pipe 5. The Y-type filter 18 can filter the industrial cooling water circulation water to avoid pipe blockage. At the same time, the Y-type filter 18 can filter the industrial water to reduce the adhesion of impurities, thereby preventing impurities from entering the closed cooling water circulation system after switching to the closed cooling water circulation system.

[0028] The working principle of this device is as follows:

[0029] During operation, the slag remover cools the oil tank 1 of the oil station with industrial cooling water. The industrial cooling water is discharged to the wastewater collection device through the industrial cooling water supply pipe 7, cooling pipe 5, and industrial cooling water drain pipe 8 to achieve the recycling of industrial cooling water. When the pressure sensor 9 detects that the industrial water pressure is normal and the first temperature sensor 6 detects that the temperature of the slag remover's power oil station 1 is higher than the preset value, or when the pressure sensor 9 detects that the industrial cooling water pressure is lower than the preset value, the controller 19 issues an alarm message through the alarms 29 and 0, and controls the first switching valve 14 and the second switching valve 15 to close, while controlling the opening of the first control valve 16 and the second control valve 17 to switch the industrial water cooling circuit to a closed cooling water circulation circuit. At this time, the cooling water in the closed cooling water system flows back to the closed cooling water system for circulation cooling after passing through the closed cooling water supply pipe 12, cooling pipe 5, and closed cooling water return pipe 12. Furthermore, the valve openings of the first control valve 16 and the second control valve 17 are regulated by feedback from the first temperature sensor 6. That is, the controller 19 compares the preset target temperature value with the actual temperature detected by the first temperature sensor 6, and automatically adjusts the valve openings of the control valves through the controller 19, thereby achieving automatic regulation of the oil temperature of the slag remover's power oil station. This feedback regulation is a common temperature control method in the field, so it will not be described in detail. With the setup of this device, the slag remover is cooled by industrial cooling water under normal conditions to improve the utilization efficiency of industrial water. When the industrial water pressure is insufficient, it switches to a closed cooling water circulation system to cool the slag remover, effectively solving the problem of insufficient industrial cooling water and poor cooling effect in the power station of the scraper slag remover of the coal-fired unit. In addition, the second temperature sensor 10, the third temperature sensor 11, and the pressure sensor 9 are installed on the cooling pipeline 5 to facilitate real-time monitoring of the system's operating status.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A cooling device for the power station of a scraper-type slag remover, comprising an oil pump, a hydraulic motor, a cooler, and an oil tank connected in sequence, wherein the oil pump inlet is connected to the oil tank outlet, and the cooler outlet is connected to the oil tank inlet, characterized in that... The oil tank of the gas station is equipped with a cooling pipe. The inlet and outlet of the cooling pipe are respectively connected to an industrial cooling water supply pipe and an industrial cooling water drain pipe. The inlet of the industrial cooling water supply pipe is connected to industrial water. It also includes a closed-loop cooling water supply pipe and a closed-loop cooling water return pipe. The two ends of the closed-loop cooling water supply pipe are connected to the inlet of the cooling pipeline and the outlet of the unit's closed-loop cooling water system, respectively. The two ends of the closed-loop cooling water return pipe are connected to the return outlet of the cooling pipeline and the return outlet of the unit's closed-loop cooling water system, respectively. Furthermore, both the industrial cooling water supply pipe and the first cooling water return pipe are equipped with switch valves, and both the closed cooling water supply pipe and the closed cooling water return pipe are equipped with control valves.

2. The cooling device for the power station of the scraper-type slag remover according to claim 1, characterized in that, Temperature sensors are installed on the oil tank, the inlet and outlet of the cooling pipes of the gas station.

3. The cooling device for the power station of the scraper-type slag remover according to claim 2, characterized in that, Pressure sensors are also installed at the inlet and outlet of the cooling pipe.

4. The cooling device for the power station of the scraper-type slag remover according to claim 3, characterized in that, It also includes a control system, which includes a controller. The temperature sensor and pressure sensor are both connected to the signal input terminal of the controller, and the switching valve and control valve are both connected to the signal output terminal of the controller.

5. The cooling device for the power station of the scraper-type slag remover according to claim 1, characterized in that, The inlet of the cooling pipeline is connected to a Y-type filter, and the two inlets of the Y-type filter are respectively connected to an industrial cooling water supply pipe and a closed cooling water supply pipe.

6. The cooling device for the power station of the scraper-type slag remover according to claim 4, characterized in that, An alarm is also connected to the signal output terminal of the controller.

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