Automatic chemical feeding device for boiler

Abstract

The utility model relates to the field of industrial boiler equipment, in particular to an automatic chemical feeding device for a boiler, which comprises a chemical feeding tank and the boiler, the chemical feeding tank and the boiler are connected through a boiler water supply pipeline, the top of the chemical feeding tank is provided with a water feeding port and a chemical feeding port, the water feeding port is connected with an external water supply pipeline, and the chemical feeding port is connected with an external chemical supply pipeline. A first electromagnetic valve is arranged on the water adding opening, a second electromagnetic valve is arranged on the medicine adding opening, a liquid level meter is installed on the outer side face of the medicine adding tank, a metering pump is arranged on a water supply pipeline of the boiler, a water quality monitor is arranged on the inner wall of the boiler, and the system further comprises a controller which is electrically connected with the first electromagnetic valve, the second electromagnetic valve, the liquid level meter, the metering pump and the water quality monitor. The utility model provides an automatic boiler dosing device which solves the problems that an existing boiler dosing device is low in operation efficiency, high in safety risk and high in maintenance cost.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial boiler equipment, and particularly relates to a boiler automatic dosing device. Background Art

[0002] A boiler is an energy conversion device. The energy input into the boiler includes the chemical energy in fuel and electric energy. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of heat energy. The original meaning of "pot" refers to a water container heated on fire, and "furnace" refers to a place for burning fuel. The boiler includes two major parts: the pot and the furnace. The hot water or steam generated in the boiler can directly provide the required heat energy for industrial production and people's lives, or can be converted into mechanical energy through a steam power device, or further converted into electric energy through a generator. A boiler that provides hot water is called a hot water boiler, which is mainly used for life and has a small amount of application in industrial production. A boiler that generates steam is called a steam boiler, often simply referred to as a boiler, and is mostly used in thermal power plants, ships, locomotives and industrial and mining enterprises.

[0003] With the continuous development of industrial automation technology, more and more industrial fields have started to implement automation transformation to improve production efficiency, reduce energy consumption, reduce manual operation, and enhance the overall operation safety. As an important device in the dry quenching coke system, the operation efficiency and safety of the waste heat boiler are directly related to the production benefits of the enterprise. Therefore, it has important practical significance and application value to automate the dosing system of the waste heat boiler.

[0004] At present, the dosing methods adopted by many industrial boilers are mostly manual dosing. During the operation of the boiler, in order to prevent scaling and corrosion, specific chemical agents need to be added to the boiler water. The manual dosing method is to directly add the prepared medicine into the water storage tank. This dosing method has many disadvantages: (1) Low operation efficiency: Manual dosing requires a lot of time and manpower, and it is difficult to accurately control the dosing amount, which affects the operation efficiency of the boiler; (2) High safety risk: Manual operation is prone to errors, which may lead to too much or too little dosing amount, thus affecting the boiler water quality and even causing safety accidents; (3) High maintenance cost: Due to the need for frequent manual inspection and adjustment, the maintenance cost of the boiler dosing system is relatively high. Summary of the Utility Model

[0005] Aiming at the technical problems existing in the prior art, such as low operation efficiency, high safety risk, high maintenance cost, uneven dosing, and inability to continuously supply medicine, the utility model provides a boiler automatic dosing device, which solves the technical problems of low operation efficiency, high safety risk, and high maintenance cost of manual dosing.

[0006] The utility model provides a boiler automatic dosing device, which includes a dosing tank, a boiler. The dosing tank and the boiler are connected through a boiler feed water pipeline. A water filling port and a dosing port are arranged at the top of the dosing tank. The water filling port is connected to an external water supply pipeline, and the dosing port is connected to an external medicine supply pipeline. A solenoid valve I is arranged on the water filling port, and a solenoid valve II is arranged on the dosing port. A liquid level gauge is installed on the outer side of the dosing tank. A metering pump is arranged on the boiler feed water pipeline, and a water quality monitor is arranged on the inner wall of the boiler. It also includes a controller, which is electrically connected to the solenoid valve I, the solenoid valve II, the liquid level gauge, the metering pump and the water quality monitor respectively.

[0007] Further, a stirrer is installed inside the dosing tank. The stirrer is connected with a stirring motor above it. The stirring motor controls the stirrer to mix the liquid medicine and water in the dosing tank evenly.

[0008] Further, a sewage discharge port is arranged at the bottom of the dosing tank for discharging impurities and sediments in the dosing tank.

[0009] Further, a Y-shaped filter, a metering pump, a pressure gauge and a pulsation damper are arranged in sequence along the water flow direction on the boiler feed water pipeline. The Y-shaped filter is used to filter out impurities in the liquid medicine to prevent solid particles from entering the pipeline and equipment. The function of the metering pump is to accurately transport and control the liquid flow. The pulsation damper is used to stabilize the pressure and flow of the fluid.

[0010] Further, a sampling port is arranged on the boiler feed water pipeline.

[0011] Further, a cleaning port is arranged at the top of the dosing tank.

[0012] The beneficial effects of the utility model are as follows:

[0013] (1) Improve the control accuracy and automatic adjustment ability of the dosing amount to ensure the stability of the boiler water quality.

[0014] (2) Reduce the input of human resources and labor intensity, and improve the operation efficiency and management level.

[0015] (3) Reduce the maintenance cost and improve the reliability of the equipment, and extend the service life. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of Embodiment 1 of the specific implementation manner of the present utility model.

[0018] Figure 1In the figure: 1 - Controller, 2 - Chemical dosing tank, 3 - Boiler, 4 - Agitator, 5 - Cleaning port, 6 - Chemical dosing port, 7 - Water filling port, 8 - Liquid level gauge, 9 - Metering pump, 10 - Pressure gauge, 11 - Sampling port, 12 - Pulsation damper, 13 - Drain port, 14 - Y-type filter, 15 - Water quality monitor, 16 - Boiler feed water pipe. Detailed implementation mode

[0019] In order to enable those skilled in the art of this technology to better understand the technical solutions in this utility model, the following will clearly and completely describe the technical solutions in the embodiments of this utility model with reference to the accompanying drawings in the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, rather than all the embodiments. Based on the embodiments in this utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this utility model.

[0020] Embodiment 1

[0021] As Figure 1 shown, a boiler automatic chemical dosing device includes a chemical dosing tank 2 and a boiler 3. The chemical dosing tank 2 and the boiler 3 are connected through a boiler feed water pipe 16. The top of the chemical dosing tank 2 is provided with a cleaning port 5, a chemical dosing port 6 and a water filling port 7. The water filling port 7 is connected to an external water supply pipe, and the chemical dosing port 6 is connected to an external chemical supply pipe. A solenoid valve one is provided on the water filling port 7, and a solenoid valve two is provided on the chemical dosing port 6. An agitator 4 is installed inside the chemical dosing tank 2, and an agitation motor is connected above the agitator 4. A drain port 13 is provided at the bottom of the chemical dosing tank 2. A liquid level gauge 8 is installed on the outer side of the chemical dosing tank 2. Along the water flow direction on the boiler feed water pipe 16, a Y-type filter 14, a metering pump 9, a pressure gauge 10 and a pulsation damper 12 are successively provided. A sampling port 11 is also provided on the boiler feed water pipe 16. A water quality monitor 15 is provided on the inner wall of the boiler 3. It further includes a controller 1. The controller 1 is electrically connected to the solenoid valve one, the solenoid valve two, the liquid level gauge 8, the metering pump 9 and the water quality monitor 15 respectively. The model of the water quality monitor 15 is 15‌PGM-1080C‌, which is provided by Shanghai Noble Environmental Protection Technology Co., Ltd. The water quality monitor 15 is used to monitor the content of calcium and magnesium ions in the water of the boiler 3 to prevent the formation of water scale.

[0022] The specific working process of this utility model is as follows:

[0023] The controller 1 is electrically connected to the chemical dosing port 6, the water filling port 7, the liquid level gauge 8, the metering pump 9, and the water quality monitor 15. The top of the chemical dosing tank 2 is provided with a cleaning port 5, a chemical dosing port 6, and a water filling port 7. The liquid medicine is trisodium phosphate mother liquor. The trisodium phosphate mother liquor and water are respectively added into the chemical dosing tank 2 through the chemical dosing port 6 and the water filling port 7. A stirrer 4 is arranged inside the chemical dosing tank 2, and a stirring motor is arranged on the top of the chemical dosing tank 2. The stirring motor is used to control the stirrer 4 to stir the trisodium phosphate and water in the chemical dosing tank 2 to make them mix evenly. After being mixed evenly, it enters the boiler 3 through the boiler feed water pipeline 16 successively passing through a regulating valve, a Y-type filter 14, a metering pump 9, a pressure gauge 10, and a pulsation damper 12. A sampling port 11 is also arranged on the boiler feed water pipeline 16. The trisodium phosphate reacts with calcium and magnesium ions in the water in the boiler to reduce the content of calcium and magnesium ions in the water, which is used to prevent the boiler 3 from scaling and corrosion. The Y-type filter 14 is used to filter out impurities in the liquid medicine to prevent solid particles from entering the boiler feed water pipeline 16 and the boiler 3. A sewage discharge port 13 is arranged at the bottom of the chemical dosing tank 2. The liquid medicine is a mother liquor prepared by mixing trisodium phosphate and pure water. The chemical dosing is realized through a solenoid valve. The trisodium phosphate reacts with calcium and magnesium ions in the water to reduce the content of calcium and magnesium ions in the boiler water, which is used to prevent the formation of water scale. The sewage discharge port 13 is used to discharge impurities generated in the chemical dosing tank 2. A liquid level gauge 8 is installed on one side of the bottom end of the chemical dosing tank 2. The liquid level gauge 8 is used to monitor the height of the liquid medicine in the chemical dosing tank 2 and realize the automatic and accurate control of the chemical dosing amount. The liquid level gauge 8 feeds back a liquid level signal to the controller 1. When the liquid level in the chemical dosing tank 2 is lower than the preset value in the controller 1, the solenoid valve 1 and the solenoid valve 2 are controlled to add water and chemical medicine to supplement the liquid medicine. At the same time, the controller 1 can independently control the solenoid valve 1 and the solenoid valve 2 to prepare liquid medicines with different concentrations. The metering pump 9 is arranged on the boiler feed water pipeline 16. The liquid medicine is added into the boiler feed water pipeline 16 through the metering pump 9, and effectively prevents the water in the boiler feed water pipeline 16 from flowing back. A water quality monitor 15 is arranged inside the boiler 3. The water quality monitor 15 monitors the water quality condition in the boiler 3 and feeds it back to the controller 1, which is used to monitor the content of calcium and magnesium ions in the liquid medicine in the boiler 3. When the water quality condition is poor, the flow rate of the metering pump 9 is controlled to increase to increase the chemical dosing amount to improve the water quality. When the water quality condition is good, the flow rate of the metering pump 9 is controlled to decrease to save the liquid medicine.

[0024] Although the present invention has been described in detail by referring to the attached drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and all such modifications or substitutions should be within the scope of the present invention. / Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, and all should be covered within the protection scope of the present invention.

Claims

1. A boiler automatic chemical dosing device, including a chemical dosing tank and a boiler. The chemical dosing tank and the boiler are connected through a boiler feed water pipeline, and it is characterized in that The top of the chemical dosing tank is provided with a water inlet and a chemical inlet. The water inlet is connected to an external water supply pipeline, and the chemical inlet is connected to an external chemical supply pipeline. A solenoid valve I is provided on the water inlet, and a solenoid valve II is provided on the chemical inlet. A liquid level gauge is installed on the outer side of the chemical dosing tank. A metering pump is provided on the boiler feed water pipeline, and a water quality monitor is provided on the inner wall of the boiler. It further includes a controller, and the controller is respectively connected to the solenoid valve I, the solenoid valve II, the liquid level gauge, the metering pump and the water quality monitor.

2. The automatic chemical dosing device for a boiler according to claim 1, characterized in that, A stirrer is installed inside the chemical dosing tank, and a stirring motor is connected above the stirrer.

3. An automatic chemical dosing device for a boiler as described in claim 1, characterized in that, The bottom of the chemical dosing tank is provided with a sewage outlet.

4. An automatic chemical dosing device for a boiler according to claim 1, characterized in that, Along the water flow direction on the boiler feed water pipeline, a Y-type filter, a metering pump, a pressure gauge and a pulsation damper are successively provided.

5. An automatic chemical dosing device for a boiler according to claim 4, characterized in that, The boiler feed water pipeline is provided with a sampling port.

6. The automatic chemical dosing device for a boiler according to claim 1, characterized in that The top of the chemical dosing tank is provided with a cleaning port.

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