Combustion promoter adding device capable of expanding application range of adding device

Abstract

The utility model belongs to the technical field of environmental protection, and relates to a combustion accelerant adding device capable of expanding the application range of the adding device, which comprises a combustion system of a coal-fired power plant, an accelerant container, a spraying device, a metering pump, a water pump, an analog signal memory and a control valve, a control valve and a metering pump are further arranged on a pipeline connected with the spraying device, the metering pump corresponds to the spraying device, the water pump is arranged on the accelerant container and used for supplying the combustion accelerant, and the metering pump is used for controlling quantitative supply of the combustion accelerant for the corresponding spraying device. The signal input end of the analog signal memory is connected with the belt weigher and is used for acquiring and storing data of the belt weigher, and the signal output end of the analog signal memory is connected with a control loop of the metering pump and the water pump and is used for providing delayed output data of the belt weigher for the controller. According to the utility model, the flexibility of mounting and adding positions is improved. And the layout of the power plant according to the coal-fired power plant coal conveying system is more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection technology and relates to a combustion accelerator addition device that expands the applicability range of the addition device. Background Technology

[0002] To avoid incomplete combustion and improve energy utilization, coal-fired power plants now install additives to bring combustion accelerators into the coal. This catalytic effect of the combustion accelerator promotes combustion, increasing the burnout rate. More complete combustion results in higher calorific value from the same mass of coal, thus achieving energy conservation and emission reduction.

[0003] Traditional combustion accelerator dosing devices used in coal-fired power plants are interlocked with belt scales. However, when modifying and installing dosing devices such as nozzles, pipelines, and pumps, the belt scale positions are often fixed in the original system. Due to the lag in controlling the pump adjustment, the existing system structure lacks flexibility in installing dosing devices, resulting in insufficient space to add the dosing device and preventing the appropriate amount of combustion accelerator from being added to certain system locations. Utility Model Content

[0004] The purpose of this invention is to provide a combustion accelerator adding device that expands the adaptability of the adding device, so as to solve the technical problem in the prior art that the lack of flexibility in the installation of the adding device leads to the inability to add an appropriate amount of combustion accelerator in some system locations.

[0005] The combustion accelerator addition device, which expands the applicability of the addition device, includes a combustion system of a coal-fired power plant, an accelerator container, a spraying device, a metering pump, a water pump, an analog signal memory, and a control valve. The accelerator container is connected to the spraying device via a pipeline. The pipeline connecting the spraying device is also equipped with a control valve and a metering pump. The metering pump corresponds to the spraying device. The water pump is located in the accelerator container and is used to supply combustion accelerator. The metering pump is used to control the quantitative supply of combustion accelerator to the corresponding spraying device. The signal input terminal of the analog signal memory is connected to a belt scale to acquire and store belt scale data. The signal output terminal of the analog signal memory is connected to the control loop of the metering pump and the water pump to provide delayed output belt scale data to the controller.

[0006] Preferably, the combustion system includes a coal pile shed, a crusher conveyor belt, a belt scale, a raw coal crusher, a coal bunker top conveyor belt, a boiler raw coal bunker, a boiler coal feeder, and a boiler combustion chamber; the spraying device is located at any position between the unloading end of the coal bunker top conveyor belt and the belt scale.

[0007] Preferably, the discharge port of the coal pile shed is connected to the feed end of the crusher conveyor belt. The crusher conveyor belt is equipped with a belt scale to collect weighing data and belt speed data. The discharge end of the crusher conveyor belt is located at the inlet of the raw coal crusher. The crusher discharge port of the raw coal crusher is connected to the top conveyor belt of the coal bunker via a coal conveying belt. The discharge end of the top conveyor belt of the coal bunker is located above the inlet of the boiler raw coal bunker.

[0008] Preferably, the discharge port of the boiler raw coal bunker is located at the feed end of the boiler coal feeder, and the discharge end of the boiler coal feeder is connected to the boiler combustion chamber.

[0009] Preferably, the analog signal memory uses a LEO-369 memory module, each metering pump is connected to and controlled by the corresponding variable frequency speed control system, and the water pump is controlled by a thermal overload relay.

[0010] Preferably, the spraying device is positioned above the conveyor belt at the top of the coal bunker.

[0011] Preferably, the spraying device is located between the raw coal crusher and the belt scale.

[0012] This invention has the following advantages: It allows for a wider range of settings for the addition location and the distance between the belt scale and the device, essentially covering the entire coal conveying line in coal-fired power plants, thus improving the flexibility of the installation location. It also makes it easier for power plants to select suitable installation sites with simple and convenient routes and safe and controlled installation processes, based on the layout of the coal conveying system. Due to the increased flexibility in the installation location of the spraying device, areas with ample space for equipment and pipeline selection and good ventilation can be used as addition points for safe application, mitigating safety risks in production. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a combustion accelerator adding device that expands the applicable range of the adding device according to this utility model.

[0014] Figure 2 This is a schematic diagram of the main circuit for controlling the water pump and metering pump in this utility model.

[0015] Figure 3 This is a schematic diagram of the analog signal memory in this utility model.

[0016] Figure 4 This is a schematic diagram of the control circuits for the two metering pumps in this utility model.

[0017] The reference numerals in the attached drawings are as follows: 1. Coal pile shed; 2. Pile shed discharge port; 3. Crusher conveyor belt; 4. Belt scale; 5. Raw coal crusher; 6. Crusher discharge port; 7. Coal conveyor belt; 8. Top conveyor belt of coal bunker; 9. Boiler raw coal bunker; 10. Boiler coal feeder; 11. Boiler combustion chamber; 12. Accelerator container; 13. Water pump; 14. Metering pump; 15. Spraying device. Detailed Implementation

[0018] The following detailed description of the embodiments, with reference to the accompanying drawings, will further illustrate the specific implementation of this utility model, in order to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of this utility model.

[0019] like Figures 1-4 As shown, this utility model provides a combustion accelerator addition device that expands the applicability range of the addition device. It includes an accelerator container 12, a spraying device 15, a metering pump 14, a water pump 13, an analog signal memory, and a control valve. The accelerator container 12 is connected to the spraying device 15 via a pipeline. The pipeline connecting the spraying device 15 is also equipped with a control valve and a metering pump 14. The metering pump 14 corresponds to the spraying device 15. The water pump 13 is located in the accelerator container 12 and is used to supply combustion accelerator. The metering pump 14 is used to control the quantitative supply of combustion accelerator to the corresponding spraying device 15. The signal input terminal of the analog signal memory is connected to a belt scale 4 to acquire and store belt scale 4 data, including weighing data and belt speed data. The analog signal memory has a timer that can output the stored data with a delay. The signal output terminal of the analog signal memory is connected to the control circuit of the metering pump 14 and the water pump 13 to provide the controller with the delayed output of belt scale 4 data.

[0020] The analog signal memory reads the data of belt scale 4 from the internal storage module in chronological order. During use, through calculation and experimentation, the staff can accurately set the delay time based on the relationship between the distance between the measuring point of belt scale 4 in the coal-fired power plant and the location of the spraying device and the belt speed. This ensures that the amount of combustion promoter added is accurately matched with the real-time data of belt scale 4, and satisfies the interlocking relationship between the amount added and belt scale 4, thus making the spraying device 15 flexible in installation.

[0021] The analog signal memory uses a LEO-369 memory module. Each metering pump 14 is connected to and controlled by a corresponding variable frequency speed control system. The water pump 13 is controlled by a thermal overload relay. In this embodiment, there are two sets of metering pumps 14, with an adjustable flow rate of 0-1000 L / h, a rated head of 40 m, and a maximum head of 50 m. The water pump 13 is a self-priming pump with a maximum flow rate of 8 m³ / h. 3The metering pump 14 has a maximum suction lift of 9m and a maximum discharge head of 19m. It is interlocked with the flow signals of the two belt scales 4 (485 digital signal and 4-20mA analog signal) to achieve interlocked control of the dripping amount and the flow rate of the belt scales 4. During operation, the belt scales 4 transmit signals to the storage module in the analog signal memory. The storage module stores the data of the belt scales 4 in chronological order. Using timers and counters in the analog signal memory, the delay reading time is set according to the distance between the dripping point and the belt scales 4 and the belt speed to achieve the desired effect.

[0022] The combustion accelerator addition device also includes a combustion system for a coal-fired power plant. This combustion system includes a coal pile shed 1, a crusher conveyor belt 3, a belt scale 4, a raw coal crusher 5, a top conveyor belt 8 in the coal bunker, a boiler raw coal bunker 9, a boiler feeder 10, and a boiler combustion chamber 11. The discharge port 2 of the coal pile shed 1 is connected to the feed end of the crusher conveyor belt 3. The belt scale 4 in the crusher conveyor belt 3 collects weighing data and belt speed data. The discharge end of the crusher conveyor belt 3 is located at the inlet of the raw coal crusher 5. The crusher discharge port 6 of the raw coal crusher 5 is connected to the top conveyor belt 8 in the coal bunker via a coal conveyor belt 7. The discharge end of the top conveyor belt 8 is located above the inlet of the boiler raw coal bunker 9. The discharge port of the boiler raw coal bunker 9 is located at the feed end of the boiler feeder 10, and the discharge end of the boiler feeder 10 is connected to the boiler combustion chamber 11.

[0023] Before adopting the combustion accelerator addition device provided by this invention, the spraying device 15 of existing combustion accelerator addition devices is mostly located in the attachment. Figure 1 Point A in the diagram is located between the raw coal crusher 5 and the belt scale 4. Because the metering pump 14 delivers the combustion accelerator, if interlocking control is required based on data collected from the belt scale 4, the spraying device 15 needs to be installed at a sufficient distance from the belt scale 4. Therefore, the space for installing the spraying device 15 at this location is limited, lacking flexibility for modification and installation. Using the combustion accelerator addition device provided by this invention, when the distance between the raw coal crusher 5 and the belt scale 4 is insufficient for interlocking, the spraying device 15 can be modified to be installed at any position between the unloading end of the top conveyor belt 8 of the coal bunker and the belt scale 4, such as above the top conveyor belt 8 of the coal bunker (see attached diagram). Figure 1 At point B, after setting up the spraying device 15, employees can precisely set the delay time based on the relationship between the distance between the measuring point of the belt scale 4 in the coal-fired power plant and the location of the spraying device, as well as the belt speed. This ensures accurate matching between the combustion accelerator dosage and the real-time data of the belt scale 4. The combustion accelerator addition device can be equipped with multiple spraying devices 15, each with a metering pump 14 for targeted control. For example, simultaneously adding spraying devices can be done at the attached... Figure 1 Spraying devices 15 are installed at points A and B in the middle.

[0024] Safety valves and check valves are added to the pipelines to achieve automatic pressure relief from high pressure, preventing pipeline rupture due to human error causing system overpressure. The check valves prevent pipeline pressure from directly acting on various pumps during shutdown, extending equipment lifespan. Some coal-fired power plant coal conveying lines have high safety protection levels due to their large pulverized coal head, confined space, and poor ventilation. This device allows for safe dosing from areas with ample space and good ventilation, mitigating safety risks.

[0025] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A combustion promoter addition device that expands the applicability of the addition device, comprising a combustion system of a coal-fired power plant, characterized in that: The system includes an accelerator container (12), a spraying device (15), a metering pump (14), a water pump (13), an analog signal memory, and a control valve. The accelerator container (12) is connected to the spraying device (15) via a pipeline. The pipeline connecting the spraying device (15) is also equipped with a control valve and a metering pump (14). The metering pump (14) corresponds to the spraying device (15). The water pump (13) is located in the accelerator container (12) and is used to supply combustion accelerator. The metering pump (14) is used to control the quantitative supply of combustion accelerator to the corresponding spraying device (15). The signal input terminal of the analog signal memory is connected to a belt scale (4) to acquire and store data from the belt scale (4). The signal output terminal of the analog signal memory is connected to the control loop of the metering pump (14) and the water pump (13) to provide the controller with delayed output data from the belt scale (4).

2. The combustion accelerator adding device with an expanded range of applicability according to claim 1, characterized in that: The combustion system includes a coal pile shed (1), a crusher conveyor belt (3), a belt scale (4), a raw coal crusher (5), a coal bunker top conveyor belt (8), a boiler raw coal bunker (9), a boiler coal feeder (10), and a boiler combustion chamber (11); the spraying device (15) is located at any position between the discharge end of the coal bunker top conveyor belt (8) and the belt scale (4).

3. The combustion promoter adding device for expanding the applicability range of the adding device according to claim 2, characterized in that: The discharge port (2) of the coal pile shed (1) is connected to the feed end of the crusher conveyor belt (3). The crusher conveyor belt (3) is equipped with a belt scale (4) to collect weighing data and belt speed data. The discharge end of the crusher conveyor belt (3) is located at the inlet of the raw coal crusher (5). The crusher discharge port (6) of the raw coal crusher (5) is connected to the top conveyor belt (8) of the coal bunker through the coal conveyor belt (7). The discharge end of the top conveyor belt (8) of the coal bunker is located above the inlet of the boiler raw coal bunker (9).

4. A combustion accelerator adding device with an expanded range of applicability according to claim 3, characterized in that: The discharge port of the boiler raw coal bunker (9) is located at the feed end of the boiler coal feeder (10), and the discharge end of the boiler coal feeder (10) is connected to the boiler combustion chamber (11).

5. A combustion accelerator adding device with an expanded range of applicability according to claim 1, characterized in that: The analog signal memory uses a LEO-369 memory module. Each metering pump (14) is connected to the corresponding variable frequency speed control system and is controlled by the variable frequency speed control system. The water pump (13) is controlled by a thermal overload relay.

6. A combustion accelerator adding device with an expanded range of applicability according to claim 3 or above, characterized in that: The spraying device (15) is positioned above the conveyor belt (8) at the top of the coal bunker.

7. A combustion accelerator adding device with an expanded range of applicability according to claim 3 or 6, characterized in that: The spraying device (15) is located between the raw coal crusher (5) and the belt scale (4).

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