A boiler drum cloud scale inhibiting device
By combining the mechanical structure of the boiler drum scale inhibitor device with a pressure sensor, the automatic and precise addition of scale inhibitor is achieved, solving the problem of unstable scale formation and ensuring stable boiler operation and extended equipment life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAANXI BEIYUAN CHEM GROUP
- Filing Date
- 2025-08-15
- Publication Date
- 2026-07-31
AI Technical Summary
Existing technologies are insufficient to effectively prevent scale formation during boiler operation, especially when hot and cold water are mixed. Traditional methods struggle to precisely control the addition of scale inhibitors, leading to unstable scale formation and impacting steam quality and boiler safety.
A scale inhibitor device for boiler drums was designed. It uses a combination of mechanical structure and pressure sensor to automatically add organic phosphonate scale inhibitors. The dosage of scale inhibitors is precisely controlled by an automatic metering water valve to ensure a scientific ratio for each ton of water and avoid water pollution caused by excessive dosage.
It enables real-time and precise addition of scale inhibitors, effectively suppressing scale formation, preventing pipe blockage and thermal efficiency reduction, extending equipment life, and ensuring stable boiler operation.
Smart Images
Figure CN224580245U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of boiler drum descaling technology, specifically a boiler drum scale inhibition device. Background Technology
[0002] When the boiler is running, the steam drum, as a core component, plays a crucial role in steam-water separation. Its condition directly affects the steam quality and the stable operation of the boiler. When we add water to the steam drum, the cold water mixes with the original hot water. Under temperature changes and pressure fluctuations, minerals such as calcium and magnesium in the water can react with other components to produce scale. Scale will adhere to the inner wall, which may block the pipes, cause local overheating, pose safety hazards, and also pollute the internal environment, affecting the steam quality.
[0003] Traditional methods for dealing with scale have many problems. Regularly shutting down the boiler for acid washing can corrode the equipment and has limitations. Manually adding scale inhibitors makes it difficult to accurately control the dosage; too little will have no effect, while too much will increase the salinity of the water. Especially when adding water in a mixture of hot and cold water, the temperature and flow changes are large, making scale formation easier. Traditional methods cannot cope with this real-time situation, and the scale prevention effect is unstable. Therefore, being able to add scale inhibitors in a measured amount during water addition to prevent scale formation is crucial for boiler operation. Utility Model Content
[0004] The purpose of this invention is to provide a scale inhibition device for boiler drums to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A boiler drum scale inhibition device includes a steam drum, a mounting bracket fixedly connected to the outer wall of the steam drum, a pressure gauge fixedly mounted on the outer wall of the steam drum, a heating circulation mechanism for heating liquid water fixedly mounted at the bottom of the steam drum, a pressure relief valve fixedly mounted at the upper end of the steam drum, the pressure relief valve releasing pressure when the internal pressure of the steam drum exceeds a predetermined value, and an automatic water replenishment mechanism for automatically replenishing liquid water inside the steam drum fixedly mounted at the bottom of the steam drum.
[0007] As a further aspect of this solution, an external connecting pipe is welded and fixed inside the steam drum. A steam connecting valve is fixedly installed at one end of the external connecting pipe located on the outer wall of the steam drum, and an internal connecting pipe is fixedly connected to one end of the external connecting pipe located inside the steam drum.
[0008] As a further aspect of this solution, the heating circulation mechanism includes a first mating round tube and a second mating round tube. The upper ends of both the first and second mating round tubes are fixedly connected to the bottom of the steam drum via a connecting pipe. The first and second mating round tubes are fixedly connected to each other via multiple heating copper pipes.
[0009] As a further aspect of this solution, the automatic water replenishment mechanism includes a mixing pipe, which is fixedly connected to the bottom of the steam drum. A connecting block is slidably connected to the inner wall of the mixing pipe, and a connecting pipe is fixedly connected inside the connecting block. A connecting box is fixedly connected to the upper end of the connecting pipe, and multiple drain pipes are fixedly connected to the bottom of the connecting box.
[0010] As a further aspect of this solution, a floating block is fixedly connected to the upper end of the connecting circular box, a pressure sensor is fixedly connected to the inner wall of the mixing tube, the outer wall of the pressure sensor abuts against the outer wall of the connecting circular block, a transfer circular box is fixedly connected to the bottom of the mixing tube, and two swing arms with reset function are rotatably connected to the upper end of the transfer circular box, with the raised end of the swing arm abutting against the bottom of the connecting circular block.
[0011] As a further aspect of this solution, a movable circular block is rotatably connected to the end of the swing arm away from the connecting circular block. The movable circular block has an inlet groove inside. The upper end of the transfer box has two openings. The outer wall of each movable circular block is slidably connected to the inner wall of one of the adjacent openings. The outer wall of the mixing tube is fixedly connected to two liquid storage boxes. Each liquid storage box is fixedly connected to the transfer box. The liquid storage box is filled with an organophosphonate scale inhibitor. The bottom of the mixing tube is fixedly connected to an automatic metering water valve.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] 1. When this utility model is used, the mechanical structure such as the floating block and connecting round block, in conjunction with the pressure sensor, can automatically trigger the addition of organic phosphonate scale inhibitor when the water volume in the steam drum decreases. The automatic metering water valve precisely controls the water replenishment, ensuring a scientific ratio of scale inhibitor to each ton of water, avoiding dosage errors caused by manual addition. This effectively inhibits scale formation without causing water pollution due to excessive dosage, significantly improving the stability of the scale inhibition effect.
[0014] 2. When using this utility model, the real-time addition of organic phosphonate scale inhibitors can prevent pipe blockage and scale formation on heating surfaces, avoid the problem of reduced thermal efficiency or local overheating caused by scale, extend the service life of the steam drum and related components, and ensure the long-term stable operation of the boiler. Attached Figure Description
[0015] Figure 1 This is a front view of a scale inhibitor device for boiler drum.
[0016] Figure 2 This is a schematic diagram of the internal structure of the steam drum in a boiler drum scale inhibition device.
[0017] Figure 3 This is a schematic diagram of the heating circulation mechanism in a boiler drum scale inhibition device.
[0018] Figure 4 This is a schematic diagram of the automatic water replenishment mechanism in a boiler drum scale inhibition device.
[0019] Figure 5 This is a schematic diagram of the internal structure of the mixing tube in a boiler drum scale inhibitor device.
[0020] Figure 6 This is a schematic diagram of the location and structure of the liquid inlet tank in a boiler drum scale inhibitor device.
[0021] Figure 7 This is a schematic diagram of the internal structure of an opening in a boiler drum scale inhibitor device.
[0022] In the diagram: 1. Steam drum; 2. Pressure gauge; 3. Pressure relief valve; 5. Mounting bracket; 6. External connecting pipe; 7. Internal connecting pipe; 8. Connecting pipe; 9. First mating round pipe; 10. Second mating round pipe; 11. Heating copper pipe; 12. Scale collection box; 13. Float block; 14. Connecting round box; 15. Drain pipe;
[0023] 16. Connecting pipe; 17. Mixing pipe; 18. Liquid storage box; 19. Connecting round block; 20. Transfer round box; 21. Metering automatic water valve; 23. Swing arm; 24. Pressure sensor; 25. Moving round block; 26. Opening; 27. Liquid inlet tank; 28. Steam connecting valve; 101. Heating circulation mechanism; 201. Automatic water replenishment mechanism. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Example 1: Please refer to Figures 1-2As shown in the embodiment of this utility model, a boiler drum scale inhibition device includes a steam drum 1. An installation bracket 5 is fixedly connected to the outer wall of the steam drum 1. When the steam drum 1 is installed, the installation bracket 5 can be fixedly installed on the upper end of the boiler by bolts. A pressure gauge 2 is also fixedly installed on the outer wall of the steam drum 1. The pressure gauge 2 can monitor the pressure change inside the steam drum 1 in real time. A heating circulation mechanism 101 for heating liquid water is also fixedly installed at the bottom of the steam drum 1. A pressure relief valve 3 is also fixedly installed at the upper end of the steam drum 1. When the pressure inside the steam drum 1 exceeds a predetermined value, the pressure relief valve 3 will release the pressure inside the steam drum 1. An automatic water replenishment mechanism 201 for automatically replenishing liquid water inside the steam drum 1 is also fixedly installed at the bottom of the steam drum 1. A water injection valve (not shown in the figure) is also fixedly installed on the outer wall of the steam drum 1.
[0026] Example 2: Please refer to Figures 2-3 As shown, an external pipe 6 is welded and fixed inside the steam drum 1. The outer wall of the external pipe 6 passes through the inside of the steam drum 1. A steam connecting valve 28 is fixedly installed at one end of the external pipe 6 located on the outer wall of the steam drum 1. An internal pipe 7 is fixedly connected to one end of the external pipe 6 located inside the steam drum 1. The internal pipe 7 and the external pipe 6 form a "U" shape.
[0027] The heating circulation mechanism 101 includes a first mating circular tube 9 and a second mating circular tube 10. Both the first mating circular tube 9 and the second mating circular tube 10 are located below the steam drum 1, but they are not on the same horizontal plane. The horizontal plane where the first mating circular tube 9 is located is higher than the horizontal plane where the second mating circular tube 10 is located. The first mating circular tube 9 and the second mating circular tube 10 are fixedly connected by multiple heating copper tubes 11. All the heating copper tubes 11 are inclined at 25 degrees. The upper ends of the first mating circular tube 9 and the second mating circular tube 10 are fixedly connected to the bottom of the steam drum 1 through a connecting pipe 8. A scale collection box 12 is fixedly connected to the bottom of the second mating circular tube 10. Specifically, when the steam drum 1 is filled with liquid water, the liquid water will enter the first mating circular tube 9 and the second mating circular tube 10 through the connecting pipe 8. Inside all the heating copper tubes 11, the liquid water level must not be higher than the upper end of the inner tube 7. The heating copper tubes 11 are heated by the boiler. Because the heating copper tubes 11 are inclined and the first matching round tube 9 is at a higher horizontal level than the second matching round tube 10, the liquid water inside the heating copper tubes 11 vaporizes into water vapor and flows to the upper first matching round tube 9 (Note: all the heating copper tubes 11 are filled with liquid water). Then, it enters the corresponding connecting tube 8 and the steam drum 1 through the first matching round tube 9. When the liquid water inside the heating copper tubes 11 vaporizes less, the liquid water inside the steam drum 1 will enter the second matching round tube 10 through the connecting tube 8, forming a circulation process. Since the liquid water may contain impurities or residual scale, the impurities or scale in the liquid water inside the second matching round tube 10 will settle downwards. The scale collection box 12 will collect the impurities in the liquid water inside the second matching round tube 10.
[0028] Please see Figure 2 , Figures 4-7 As shown, the automatic water replenishment mechanism 201 includes a mixing pipe 17, which is fixedly connected to the bottom of the steam drum 1 by bolts (please refer to...). Figure 2A connecting block 19 is slidably connected to the inner wall of the mixing pipe 17. A connecting pipe 16 is fixedly connected inside the connecting block 19. The outer wall of the connecting pipe 16 slidably passes through the mixing pipe 17 and the interior of the steam drum 1. A connecting box 14 is fixedly connected to the upper end of the connecting pipe 16. Multiple drain pipes 15 are fixedly connected to the bottom of the connecting box 14. The multiple drain pipes 15 are circumferentially distributed at the bottom of the connecting box 14. A floating block 13 is fixedly connected to the upper end of the connecting box 14. The floating block 13 is hollow inside. A pressure sensor 24 is fixedly connected to the inner wall of the mixing pipe 17. The device 24 is specifically an MS5803-14BA miniature pressure sensor with an operating temperature range of -40℃ to +85℃. It is small in size and has good waterproof performance. The outer wall of the pressure sensor 24 abuts against the outer wall of the connecting block 19. The bottom of the mixing tube 17 is fixedly connected to a transfer box 20. The upper end of the transfer box 20 is rotatably connected to two swing arms 23 with reset function through a rotating shaft. The raised end of the swing arm 23 abuts against the bottom of the connecting block 19. A reset torsion spring is engaged between the swing arm 23 and the transfer box 20. At this time, the reset torsion spring is in a charged state.
[0029] The end of the swing arm 23 away from the connecting block 19 is rotatably connected to a movable block 25. The movable block 25 has an inlet groove 27 inside. The upper end of the transfer box 20 has two openings 26. The outer wall of each movable block 25 is slidably connected to the inner wall of a nearby opening 26. The outer wall of the mixing pipe 17 is fixedly connected to two storage boxes 18. Each storage box 18 is fixedly connected to the transfer box 20 through a pipe (not shown in the pipe diagram). The storage box 18 is filled with an organophosphonate scale inhibitor, and the organophosphonate scale inhibitor is in liquid form. The recommended dosage is 5-10 grams per 500 liters of water. The bottom of the mixing pipe 17 is fixedly connected to a metering automatic water valve 21. The outer wall of the metering automatic water valve 21 passes through the interior of the transfer box 20. The metering automatic water valve 21 is existing technology and will not be described in detail here.
[0030] The working principle of this utility model is as follows:
[0031] In use, liquid water is injected into the steam drum 1. The liquid water level inside the steam drum 1 must not exceed the upper end of the inner pipe 7. At this time, the liquid water inside the steam drum 1 will flow through the connecting pipe 8 to the interior of the second mating circular pipe 10 and the first mating circular pipe 9. Subsequently, the interior of the heating copper pipe 11 will also be filled with liquid water. When liquid water is added to the steam drum 1, the float 13 will float on the water surface and rise with the rise of the water level. At this time, the float 13 will drive the connecting circular box 14 and the connecting pipe 16 to move upward. The connecting pipe 16 will drive the connecting circular box 14 to move upward. 9 moves upward inside the mixing tube 17. When the connecting block 19 disengages from the outer wall of the swing arm 23, the reset torsion spring will drive the swing arm 23 to rotate and reset. The swing arm 23 will drive the moving block 25 to move into the opening 26, so that the moving block 25 enters the transfer box 20. Since the liquid storage box 18 and the transfer box 20 are connected, the organic phosphonate scale inhibitor inside the connecting block 19 will enter the transfer box 20. At this time, the organic phosphonate scale inhibitor inside the transfer box 20 will enter the inlet tank 27.
[0032] When the connecting block 19 moves to the top of the inner wall of the mixing pipe 17, water addition stops. According to the above working principle, after the liquid water inside the steam drum 1 is heated and evaporated, it will be discharged through the inner pipe 7 and the outer pipe 6. The steam connecting valve 28 can be connected to an external pipe. When the water level inside the steam drum 1 decreases due to evaporation, the water level will drop, and the float block 13 will descend along with it. The float block 13 will drive the connecting box 14 and the connecting pipe 16 to descend, and the connecting pipe 16 will drive the connecting block 19 to descend. When the outer wall of the connecting block 19 abuts against the outer wall of the swing arm 23, the swing arm 23 will rotate, pulling the moving block 25 upwards, leaving the interior of the transfer box 20 and the opening 26. When the connecting block 19 abuts against the outer wall of the pressure sensor 24, assuming that the water level inside the steam drum 1 has decreased by 500 liters, the liquid inlet tank 27 will also... The organic phosphonate scale inhibitor located inside the mixing tube 17 and the inlet tank 27 will flow into the mixing tube 17. At this time, the pressure sensor 24 will trigger the automatic metering water valve 21 to open. Before starting, the automatic metering water valve 21 has been connected to a water pipe with water pressure. The water inside the water pipe will enter the mixing tube 17 through the automatic metering water valve 21. For example, when the water inside the steam drum 1 decreases by 500 liters, the connecting block 19 will abut against the outer wall of the pressure sensor 24. Each inlet tank 27 can store 5 grams of organic phosphonate scale inhibitor, and the two together equal 10 grams. When the water enters the mixing tube 17, it will mix the organic phosphonate scale inhibitor and discharge it into the connecting box 14 through the connecting pipe 16, and then into the steam drum 1 through the drain pipe 15. The automatic metering water valve 21 will accurately control the water output. When the output reaches 500 liters, it will automatically close.
[0033] When the water level inside the steam drum 1 decreases again, according to the working principle described above, automatic water replenishment can be performed. Note that when liquid water is replenished again, since there is already liquid water inside the mixing pipe 17, when the water level inside the steam drum 1 decreases, the connecting round box 14 and the floating block 13 will move the connecting pipe 16 and the connecting round block 19 downwards by their own weight, so that the water inside the mixing pipe 17 is squeezed into the connecting pipe 16 and then discharged from the drain pipe 15.
[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A boiler drum cloud scale inhibiting device comprising a drum (1), characterized in that, The outer wall of the steam drum (1) is fixedly connected to the mounting bracket (5), and the outer wall of the steam drum (1) is also fixedly installed with a pressure gauge (2). The bottom of the steam drum (1) is also fixedly installed with a heating circulation mechanism (101) that can heat liquid water. The upper end of the steam drum (1) is also fixedly installed with a pressure relief valve (3). When the pressure inside the steam drum (1) exceeds a predetermined value, the pressure relief valve will release the pressure inside the steam drum (1). The bottom of the steam drum (1) is also fixedly installed with an automatic water replenishment mechanism (201) that can automatically replenish liquid water inside the steam drum (1).
2. A boiler drum cloud scale inhibiting device according to claim 1, wherein An external pipe (6) is welded and fixed inside the steam drum (1). A steam connecting valve (28) is fixedly installed at one end of the external pipe (6) located on the outer wall of the steam drum (1). An internal pipe (7) is fixedly connected to one end of the external pipe (6) located inside the steam drum (1).
3. A boiler drum cloud scale inhibiting device according to claim 1, wherein The heating circulation mechanism (101) includes a first mating round tube (9) and a second mating round tube (10). The upper ends of the first mating round tube (9) and the second mating round tube (10) are fixedly connected to the bottom of the steam drum (1) through a connecting pipe (8). The first mating round tube (9) and the second mating round tube (10) are fixedly connected through multiple heating copper pipes (11).
4. A boiler drum cloud scale inhibiting device according to claim 1, wherein The automatic water replenishment mechanism (201) includes a mixing pipe (17), which is fixedly connected to the bottom of the steam drum (1). A connecting block (19) is slidably connected to the inner wall of the mixing pipe (17). A connecting pipe (16) is fixedly connected inside the connecting block (19). A connecting box (14) is fixedly connected to the upper end of the connecting pipe (16). Multiple drain pipes (15) are fixedly connected to the bottom of the connecting box (14).
5. A boiler drum cloud scale inhibiting device according to claim 4, wherein A floating block (13) is fixedly connected to the upper end of the connecting round box (14), a pressure sensor (24) is fixedly connected to the inner wall of the mixing tube (17), the outer wall of the pressure sensor (24) abuts against the outer wall of the connecting round block (19), a transfer round box (20) is fixedly connected to the bottom of the mixing tube (17), and two swing arms (23) with reset function are rotatably connected to the upper end of the transfer round box (20), and the end of the swing arm (23) raised upward abuts against the bottom of the connecting round block (19).
6. A boiler drum cloud scale inhibiting device according to claim 5, wherein The swing arm (23) is rotatably connected to a movable block (25) at the end away from the connecting block (19). The movable block (25) has an inlet groove (27) inside. The upper end of the transfer box (20) has two openings (26). The outer wall of each movable block (25) is slidably connected to the inner wall of a nearby opening (26). The outer wall of the mixing tube (17) is fixedly connected to two storage boxes (18). Each storage box (18) is fixedly connected to the transfer box (20). The storage box (18) is filled with an organophosphonate scale inhibitor. The bottom of the mixing tube (17) is fixedly connected to a metering automatic water valve (21).