Boiler dosing device easy to expand

Abstract

The utility model relates to the technical field of boiler descaling, in particular to an easy-to-expand boiler dosing device which comprises a water diversion main pipe and a dosing main pipe which are arranged on a boiler water inlet main pipe, at least one dosing branch pipe is arranged between the water diversion main pipe and the dosing main pipe in parallel, and each dosing branch pipe is provided with a dosing unit; the dosing unit comprises a storage box, a blender and a feeder, the blender is arranged on one side of the storage box, the feeder is arranged between the storage box and the blender, and the blender is provided with a water diversion port and a medicine outlet which are communicated with the dosing branch pipe; a discharging opening is formed in the bottom of the storage box, a feeding opening is formed in the top of the mixer, an inlet of the feeder is communicated with the discharging opening of the storage box, and a weighing mechanism is arranged between an outlet of the feeder and the feeding opening of the mixer; according to the boiler descaling device, the dosing requirement of multiple furnaces and multiple chemicals is met, and the boiler descaling flexibility and efficiency are improved; errors caused by manual weighing are avoided, and the operation stability and safety of the boiler are improved.

Description

Technical Field

[0001] This utility model relates to the field of boiler descaling technology, and in particular to a boiler chemical dosing device that is easy to expand. Background Technology

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat transfer fluid with a certain amount of thermal energy. Calcium and magnesium in the boiler feedwater undergo chemical reactions at high temperatures, forming insoluble scale that adheres firmly to the boiler's heating surfaces. This scale hinders heat conduction and, in severe cases, can lead to boiler tube rupture. To ensure the quality of the boiler feedwater, chemical dosing is typically used to convert the hardness salts of calcium and magnesium ions into insoluble, highly fluid, lightweight sludge, which is then discharged through the boiler's blowdown and continuous blowdown systems.

[0003] Existing dosing devices generally can only add one type of chemical, which has poor scalability and cannot meet the dosing needs of multiple boilers with multiple chemicals. In addition, existing dosing devices require manual weighing of the chemical before dosing and stirring before pouring it into the feed port of the dosing device. This results in problems such as inaccurate weighing and uneven stirring, which causes the concentration of the chemical solution in the boiler to deviate from the benchmark, causing foaming or bubbling in the boiler water, thus affecting the use of the boiler. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a boiler dosing device that can meet the dosing needs of multiple furnaces and multiple drugs, accurately weigh and evenly stir, and is easy to expand, in order to overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An easily expandable boiler dosing device, characterized by:

[0007] It includes a water inlet main pipe and a chemical outlet main pipe installed on the boiler inlet main pipe. At least one chemical dosing branch pipe is connected in parallel between the water inlet main pipe and the chemical outlet main pipe, and a chemical dosing unit is installed on each chemical dosing branch pipe.

[0008] The dosing unit includes a storage tank, a mixer, and a feeder. The mixer is located on one side of the storage tank, and the feeder is located between the storage tank and the mixer. The mixer has a water inlet and a dosing outlet that are connected to the dosing branch pipe. A discharge outlet is provided at the bottom of the storage tank, and a feed inlet is provided at the top of the mixer. The inlet of the feeder is connected to the discharge outlet of the storage tank, and a weighing mechanism is provided between the outlet of the feeder and the inlet of the mixer.

[0009] The weighing mechanism includes a support frame, a weighing hopper, and a sensor. The support frame is located on top of the mixer, the weighing hopper is located on the support frame, and the sensor is located between the support frame and the weighing hopper. The outlet of the feeder faces the weighing hopper, and the outlet of the weighing hopper is connected to the feed inlet of the mixer. A feed valve linked to the sensor is installed at the feed inlet of the mixer.

[0010] The technical problem to be solved by this utility model can be further achieved through the following steps: the mixer includes a base and a mixing cylinder installed on the base. A stirring mechanism is provided inside the mixing cylinder. The stirring mechanism includes a stirring rod coaxially rotatably disposed inside the mixing cylinder, several rows of stirring blades fixedly installed on the stirring rod, and a drive motor fixedly installed at one end of the mixing cylinder and connected to the end of the stirring rod.

[0011] The technical problem to be solved by this utility model can be further achieved through the following steps: the mixing cylinder specifically includes an inner cylinder and an outer cylinder, and a temperature regulating jacket for temperature regulating water to circulate is provided between the inner cylinder and the outer cylinder. A temperature regulating water inlet is provided at the upper part of the temperature regulating jacket, and a temperature regulating water outlet is provided at the lower part of the temperature regulating jacket. A circulation pipeline is connected between the temperature regulating water inlet and the temperature regulating water outlet, and a water pump and a temperature regulating heat exchanger are also installed on the circulation pipeline.

[0012] The technical problem to be solved by this utility model can be further achieved through the following steps: the top of the storage box is provided with a feeding port and a nitrogen injection port, the inner wall of the storage box is provided with a silica gel drying layer, and a discharge valve is also installed on the path connecting the inlet of the feeder and the discharge port of the storage box.

[0013] The technical problem to be solved by this utility model can be further achieved through the following steps: the feeder is vertically arranged between the storage bin and the mixer, and the inlet and outlet of the feeder are respectively located at its lower and upper parts. The feeder is specifically a screw feeder.

[0014] The technical problem to be solved by this utility model can be further achieved through the following steps: a display screen is provided on one side of the weighing hopper, and a vibrator is provided on the other side of the weighing hopper to facilitate material discharge.

[0015] The technical problem to be solved by this utility model can be further achieved through the following steps: the main water inlet pipe is installed on the boiler inlet main pipe through a three-way valve, and each chemical dosing branch pipe is equipped with a water inlet valve and a chemical outlet valve. The chemical dosing unit is located between the water inlet valve and the chemical outlet valve.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] (1) By setting up parallel dosing branch pipes and corresponding dosing units, the expandability of the device is significantly improved, enabling it to meet the dosing requirements of multiple boilers and multiple chemicals, and improving the flexibility and efficiency of boiler descaling.

[0018] (2) The weighing mechanism can ensure the accurate weighing of the agent, avoid the error caused by manual weighing, thus ensuring the stability of the concentration of the liquid in the boiler, effectively preventing the problem of foaming or bubbling in the boiler water, and improving the operation stability and safety of the boiler.

[0019] (3) The stirring mechanism inside the mixer ensures that the agent and water are fully mixed, which improves the uniformity of the solution and further enhances the descaling effect. At the same time, the temperature-regulating jacket design of the mixing cylinder allows for precise control of the solution temperature, optimizing the dissolution and mixing effect of the agent.

[0020] (4) The silica gel drying layer and nitrogen filling port design of the storage box effectively prevent the agent from getting damp and deteriorating, ensuring the long-term storage effect of the agent. The screw feeding method of the feeder ensures the stable delivery of the agent, further improving the accuracy and reliability of the dosing. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the dosing unit.

[0023] Figure 3 This is an enlarged schematic diagram of the weighing mechanism;

[0024] In the diagram: 1-Water inlet main pipe; 2-Drug outlet main pipe; 3-Drug dosing branch pipe; 4-Drug dosing unit; 5-Storage bin; 6-Mixer; 7-Feeder; 8-Water inlet; 9-Drug outlet; 10-Discharge port; 11-Feed inlet; 12-Support frame; 13-Weighing hopper; 14-Sensor; 15-Feed valve; 16-Base; 17-Mixing cylinder; 18-Agitator rod; 19-Agitator blade; 20-Drive motor; 21-Temperature regulating jacket; 22-Temperature regulating water inlet; 23-Temperature regulating water outlet; 24-Feeding port; 25-Nitrogen injection port; 26-Silica gel drying layer; 27-Discharge valve; 28-Display screen; 29-Three-way valve; 30-Water inlet valve; 31-Drug outlet valve; 32-Boiler inlet main pipe. Detailed Implementation

[0025] The specific technical solutions of this utility model are further described below to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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. Therefore, they should not be construed as limitations on the utility model.

[0027] Please refer to Figure 1-3 An easily expandable boiler dosing device includes a main water inlet pipe 1 and a main chemical outlet pipe 2 installed on the boiler inlet main pipe 32. At least one dosing branch pipe 3 is connected in parallel between the main water inlet pipe 1 and the main chemical outlet pipe 2, and each dosing branch pipe 3 is equipped with a dosing unit 4. Figure 1 As shown, this embodiment includes a dosing unit A and a dosing unit B, which are used to add two different agents into the boiler. In actual use, the dosing unit can be expanded according to the needs.

[0028] The dosing unit 4 includes a storage tank 5, a mixer 6, and a feeder 7. The mixer 6 is located on one side of the storage tank 5, and the feeder 7 is located between the storage tank 5 and the mixer 6. The mixer 6 has a water inlet 8 and a drug outlet 9 that are connected to the dosing branch pipe 3, which facilitates the introduction of water into the mixer 6 and the discharge of the drug after mixing with water. A discharge port 10 is provided at the bottom of the storage tank 5, and a feed inlet 11 is provided at the top of the mixer 6. The inlet of the feeder 7 is connected to the discharge port 10 of the storage tank 5, and a weighing mechanism is provided between the outlet of the feeder 7 and the feed inlet 11 of the mixer 6.

[0029] The weighing mechanism includes a support frame 12, a weighing hopper 13, and a sensor 14. The support frame 12 is located on top of the mixer 6, the weighing hopper 13 is located on the support frame 12, and the sensor 14 is positioned between the support frame 12 and the weighing hopper 13 to monitor the weight of the medicine. The outlet of the feeder 7 faces the weighing hopper 13, and the outlet of the weighing hopper 13 is connected to the feed inlet 11 of the mixer 6. A feed valve 15, which is linked to the sensor 14, is installed at the feed inlet 11 of the mixer 6. When the medicine is fed into the weighing hopper 13, the sensor 14 captures the weight change in real time. Once the preset dosage is reached, the feed valve 15 automatically opens, allowing the medicine to enter the mixer 6 for mixing.

[0030] The structure of mixer 6 is as follows Figure 2As shown, it includes a base 16 and a mixing cylinder 17 mounted on the base 16. A stirring mechanism is provided inside the mixing cylinder 17. The stirring mechanism includes a stirring rod 18 coaxially rotatably disposed inside the mixing cylinder 17, several rows of stirring blades 19 fixedly mounted on the stirring rod 18, and a drive motor 20 fixedly mounted at one end of the mixing cylinder 17 and drivenly connected to the end of the stirring rod 18. The drive motor 20 drives the stirring rod 18 and the stirring blades 19 to rotate through the transmission connection, thereby achieving full mixing of the reagent and water.

[0031] To further optimize the mixing effect and control the temperature of the drug solution, the mixing cylinder 17 specifically includes an inner cylinder and an outer cylinder. A temperature-regulating jacket 21 for temperature-regulating water to circulate is provided between the inner and outer cylinders. A temperature-regulating water inlet 22 is provided at the upper part of the temperature-regulating jacket 21, and a temperature-regulating water outlet 23 is provided at the lower part of the temperature-regulating jacket 21. A circulation pipeline (not shown in the figure) is connected between the temperature-regulating water inlet 22 and the temperature-regulating water outlet 23. A water pump and a temperature-regulating heat exchanger are also installed on the circulation pipeline. By adjusting the temperature and flow rate of the temperature-regulating water, the temperature inside the mixing cylinder 17 can be precisely controlled, thereby optimizing the dissolution and mixing process of the drug.

[0032] To further optimize the storage stability of the reagent, the top of the storage tank 5 is provided with a feeding port 24 and a nitrogen injection port 25, which facilitates the user to add the reagent and inject nitrogen to prevent the reagent from getting damp. The inner wall of the storage tank 5 is provided with a silica gel drying layer 26 to further enhance the moisture-proof effect. A discharge valve 27 is also installed on the path connecting the inlet of the feeder 7 and the discharge port 10 of the storage tank 5 to control the discharge of the reagent.

[0033] The feeder 7 adopts a vertical design, with its inlet and outlet located at the bottom and top of the feeder 7, respectively. In this embodiment, the feeder 7 is specifically a screw feeder, which can stably transport the agent from the storage tank 5 to the weighing hopper 13.

[0034] In addition, a display screen 28 is provided on one side of the weighing hopper 13 to display the current weight information of the medicine, and a vibrator (not shown) is provided on the other side to facilitate the discharge of the medicine.

[0035] The main water inlet pipe 1 is installed on the boiler inlet main water pipe 32 via a three-way valve 29. Each chemical dosing branch pipe 3 is equipped with a water inlet valve 30 and a chemical outlet valve 31. The chemical dosing unit 4 is located between the water inlet valve 30 and the chemical outlet valve 31. That is, the mixer 6 is connected to the chemical dosing branch pipe 3 via the water inlet 8 and the chemical outlet 9.

[0036] Working Principle: This easily expandable boiler dosing device, in use, first adds the required chemicals to each storage tank 5 through the feeding port 24, and then injects nitrogen through the nitrogen injection port 25. Combined with the silica gel drying layer 26 on the inner wall of the storage tank 5, this ensures the dry storage of the chemicals. When the boiler needs dosing, the operator controls the opening of the discharge valve 27, allowing the chemicals in the storage tank 5 to fall into the feeder 7. The feeder 7, i.e., the screw feeder, uses its spiral structure to stably deliver the chemicals into the weighing hopper 13.

[0037] During the process of feeding the reagent into the weighing hopper 13, the sensor 14 monitors its weight in real time and transmits the data to the control system. When the weight of the reagent in the weighing hopper 13 reaches the preset value, the control system sends a signal to automatically open the feed valve 15, which is linked to the sensor 14, allowing the reagent to enter the mixer 6. The vibrator can assist in discharging the reagent from the weighing hopper 13 when necessary. At the same time, the operator opens the priming valve 30, and boiler feed water is sent into the mixer 6 through the priming main pipe 1 and the dosing branch pipe 3 to mix with the reagent.

[0038] The stirring mechanism inside the mixer 6, driven by the drive motor 20, rotates the stirring rod 18 and the stirring blade 19 to thoroughly mix the medicine and water. To optimize the mixing effect and control the temperature of the medicine solution, the water pump in the circulation pipeline sends temperature-controlled water into the temperature-controlled jacket 21 of the mixing cylinder 17, and adjusts its temperature through the temperature-controlled heat exchanger, thereby achieving precise temperature control inside the mixing cylinder 17.

[0039] The well-mixed liquid medicine is then sent into the boiler feedwater through the outlet 9 of the mixer 6 and the dosing branch pipe 3, and finally through the dosing branch pipe 3 and the main dosing pipe 2 under the control of the dosing valve 31, thus completing the dosing process.

[0040] 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 embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. An easily expandable boiler dosing device, characterized in that: It includes a water inlet main pipe and a chemical outlet main pipe installed on the boiler inlet main pipe. At least one chemical dosing branch pipe is connected in parallel between the water inlet main pipe and the chemical outlet main pipe, and a chemical dosing unit is installed on each chemical dosing branch pipe. The dosing unit includes a storage tank, a mixer, and a feeder. The mixer is located on one side of the storage tank, and the feeder is located between the storage tank and the mixer. The mixer has a water inlet and a dosing outlet that are connected to the dosing branch pipe. A discharge outlet is provided at the bottom of the storage tank, and a feed inlet is provided at the top of the mixer. The inlet of the feeder is connected to the discharge outlet of the storage tank, and a weighing mechanism is provided between the outlet of the feeder and the inlet of the mixer. The weighing mechanism includes a support frame, a weighing hopper, and a sensor. The support frame is located on top of the mixer, the weighing hopper is located on the support frame, and the sensor is located between the support frame and the weighing hopper. The outlet of the feeder faces the weighing hopper, and the outlet of the weighing hopper is connected to the feed inlet of the mixer. A feed valve linked to the sensor is installed at the feed inlet of the mixer.

2. The easily expandable boiler dosing device according to claim 1, characterized in that: The mixer includes a base and a mixing cylinder mounted on the base. A stirring mechanism is provided inside the mixing cylinder. The stirring mechanism includes a stirring rod coaxially rotatably disposed inside the mixing cylinder, several rows of stirring blades fixedly mounted on the stirring rod, and a drive motor fixedly mounted at one end of the mixing cylinder and connected to the end of the stirring rod.

3. The easily expandable boiler dosing device according to claim 2, characterized in that: The mixing cylinder specifically includes an inner cylinder and an outer cylinder. A temperature regulating jacket is provided between the inner cylinder and the outer cylinder for the flow of temperature regulating water. A temperature regulating water inlet is provided at the upper part of the temperature regulating jacket, and a temperature regulating water outlet is provided at the lower part of the temperature regulating jacket. A circulation pipeline is connected between the temperature regulating water inlet and the temperature regulating water outlet. A water pump and a temperature regulating heat exchanger are also installed on the circulation pipeline.

4. The easily expandable boiler dosing device according to claim 1, characterized in that: The top of the storage bin is equipped with a feeding port and a nitrogen filling port. The inner wall of the storage bin is equipped with a silica gel drying layer. A discharge valve is also installed on the path connecting the inlet of the feeder and the discharge port of the storage bin.

5. The easily expandable boiler dosing device according to claim 1, characterized in that: The feeder is vertically positioned between the storage bin and the mixer, with its inlet and outlet located at its lower and upper parts, respectively. The feeder is specifically a screw feeder.

6. The easily expandable boiler dosing device according to claim 1, characterized in that: The weighing hopper is equipped with a display screen on one side and a vibrator on the other side to facilitate material discharge.

7. The easily expandable boiler dosing device according to claim 1, characterized in that: The main water inlet pipe is installed on the boiler inlet main pipe via a three-way valve. Each chemical dosing branch pipe is equipped with a water inlet valve and a chemical outlet valve. The chemical dosing unit is located between the water inlet valve and the chemical outlet valve.

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