Industrial boiler water quality PH adjusting and monitoring system

Abstract

The industrial boiler water quality PH adjusting and monitoring system comprises a pure water pipeline arranged between a heat preservation water tank and a pure water tank, one end of the pure water pipeline is communicated with the pure water tank through a first water outlet pipe connected with a water pump, and the other end of the pure water pipeline is communicated with the heat preservation water tank through a second water outlet pipe. The pure water pipeline is provided with a dosing port and a detection point used for mounting a PH sensor, the dosing port is communicated with the medicine box through a dosing device, and a mixing device used for uniformly mixing medicine liquid conveyed in the pure water pipeline is arranged in the pure water pipeline. According to the utility model, by optimizing the positions of the dosing port and the detection point and arranging the dosing port and the detection point on the pure water pipeline with low temperature, the problem that the PH sensor is always in a detection state or the probe is easy to damage due to higher water temperature of the detection point is solved, and the mixing device is arranged in the pure water pipeline, so that the liquid medicine enters the heat-insulating water tank after being uniformly mixed, and the water quality is improved. The detection precision is improved while sufficient dissolution of the liquid medicine is ensured, the uniformity of the liquid medicine is good, and the service life of the PH sensor is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of water quality monitoring, and in particular relates to an industrial boiler water quality PH regulating monitoring system. Background Art

[0002] According to the requirements of "Industrial Boiler Water Quality" GB / T1576-2018, for boilers with a rated pressure of 1.0MPa<P≤1.6MPa, the pH range of desalted water should be 8.5~10.5. Too low pH will accelerate the corrosion of the boiler body; the appropriate pH will inhibit the hydrolysis of silicates in the boiler water and reduce the solubility of silicate in steam (especially high-pressure steam); when the pH value of the boiler water is too high, it is not only easy to cause alkaline corrosion, but also may cause the boiler water to produce foam and affect the steam quality. Therefore, controlling the pH value of boiler feed water plays a very important role in the safety of the equipment body and the quality of steam.

[0003] The existing water supply PH dosing port is located on the insulated water tank, and the detection point is located in the pipeline from the water outlet of the insulated water tank to the water inlet of the deaerator. The pure water in the pipeline is always in a circulating heat absorption state. Due to the influence of the exhaust gas recovery of the deaerator and the steam condensate recovery, the water temperature in the pipeline can reach 70°C, while the operating temperature of the PH sensor is less than 50°C, which makes the sensor probe easy to be damaged and always in the detection state; and because the water tank has no stirring function, the liquid medicine is not fully dissolved and the detection is not accurate enough. Therefore, in order to solve the above problems, it is necessary to make improvements. Utility Model Content

[0004] The technical problem solved by the utility model is as follows: to provide an industrial boiler water quality PH adjustment monitoring system, which optimizes the positions of the dosing port and the detection point and sets them on a pure water pipeline with low temperature, thereby solving the problem that the PH sensor is always in the detection state or the probe is easily damaged due to the high water temperature at the detection point, and by setting a mixing device in the pure water pipeline, the drug liquid is mixed evenly and then enters the insulated water tank, thereby ensuring that the drug liquid is fully dissolved and improving the detection accuracy, with a simple structure, novel design, good drug liquid uniformity, and prolonged service life of the PH sensor.

[0005] The technical solution adopted by the utility model: an industrial boiler water quality PH regulation monitoring system, including a pure water pipeline arranged between an insulated water tank and a pure water tank, one end of the pure water pipeline is connected to the pure water tank through a first water outlet pipe connected to a water pump, and the other end of the pure water pipeline is connected to the insulated water tank through a second water outlet pipe, a dosing port and a detection point for installing a PH sensor are provided on the pure water pipeline, and the dosing port is connected to the medicine box through a dosing device, and a mixing device is provided in the pure water pipeline for uniformly mixing the medicine liquid transported therein.

[0006] Among them, the mixing device includes a rotating shaft and an impeller, and brackets are fixed on the inner walls at both ends of the pure water pipeline, and the two ends of the rotating shaft arranged in the pure water pipeline are rotatably installed on the brackets at the corresponding ends through bearings. More than one group of impellers are fixed on the rotating shaft, and the rotating shaft drives the impellers to rotate under the action of the flowing medicinal liquid to stir and even the medicinal liquid in the pure water pipeline.

[0007] Furthermore, the bracket includes a central ring and a plurality of support rods evenly distributed on the outer circumferential wall of the ring, the outer ends of the plurality of support rods are fixed to the inner wall of the end of the pure water pipe, and the bearing adapted to be connected to the end of the rotating shaft is installed in the ring.

[0008] Furthermore, the dosing device includes a dosing pump and a dosing pipe, one end of the dosing pipe is connected to the dosing port on the pure water pipeline, and the other end of the dosing pipe connected to the dosing pump is connected to the medicine box.

[0009] Furthermore, the drug adding port is arranged on the same side as the first water outlet pipe, and the detection point is arranged on the same side as the second water outlet pipe.

[0010] The advantages of this utility model compared with the prior art:

[0011] 1. This technical solution optimizes the position of the detection point and sets it on a pure water pipe with low temperature, thus solving the problem that the pH sensor is always in the detection state or the probe is easily damaged due to the high water temperature at the detection point;

[0012] 2. This technical solution sets a mixing device in the pure water pipeline so that the liquid medicine is mixed evenly and then enters the insulated water tank to ensure that the liquid medicine is fully dissolved;

[0013] 3. This technical solution adopts that the drug adding port is set on the same side as the first water outlet pipe and the detection point is set on the same side as the second water outlet pipe, so that the drug solution is added and stirred before detection, and then detected, thereby improving the detection accuracy;

[0014] 4. This technical solution has a simple structure, novel design, good uniformity of the liquid medicine, and improves the service life of the pH sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the pure water pipeline of the utility model;

[0017] Figure 3 It is a schematic diagram of the end face structure of the pure water pipeline of the utility model. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiment of the present utility model Figure 1-3, clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0021] Industrial boiler water quality PH adjustment monitoring system, such as Figure 1-3 As shown, it includes a pure water pipeline 3 arranged between the insulated water tank 1 and the pure water tank 2, one end of the pure water pipeline 3 is connected to the pure water tank 2 through a first water outlet pipe 5 connected to a water pump 4, and the other end of the pure water pipeline 3 is connected to the insulated water tank 1 through a second water outlet pipe 6, a dosing port and a detection point for installing a PH sensor are provided on the pure water pipeline 3, and the dosing port is connected to the medicine box 9 through a dosing device, and a mixing device for uniformly mixing the liquid medicine transported therein is provided in the pure water pipeline 3; in the above structure, by optimizing the position of the detection point and setting it on the pure water pipeline 3 with low temperature, the problem that the PH sensor is always in the detection state or the probe is easily damaged due to the high water temperature at the detection point is solved; by setting a mixing device in the pure water pipeline 3, the liquid medicine is mixed evenly and then enters the insulated water tank 1, ensuring that the liquid medicine is fully dissolved;

[0022] like Figure 2-3As shown, the specific structure of the mixing device is as follows: the mixing device includes a rotating shaft 10 and an impeller 11, and brackets 12 are fixed on the inner walls of both ends of the pure water pipeline 3, and the two ends of the rotating shaft 10 arranged in the pure water pipeline 3 are rotatably installed on the brackets 12 at the corresponding ends through bearings, and more than one group of impellers 11 are fixed on the rotating shaft 10, and the rotating shaft 10 drives the impeller 11 to rotate under the action of the flowing medicinal liquid to stir the medicinal liquid in the pure water pipeline 3.

[0023] like Figure 2-3 As shown, the specific structure of the bracket 12 is as follows: the bracket 12 includes a central ring 12-1 and a plurality of support rods 12-2 uniformly distributed on the outer circumferential wall of the ring 12-1, the outer ends of the plurality of support rods 12-2 are fixed to the inner wall of the end of the pure water pipe 3, and the bearing adapted to be connected to the end of the rotating shaft 10 is installed in the ring 12-1. The bracket 12 with the above structure can reliably support the rotating shaft 10 while ensuring that the medicine passes through the pure water pipe 3 smoothly.

[0024] like Figure 1 As shown, the specific structure of the dosing device is as follows: the dosing device includes a dosing pump 7 and a dosing pipe 8, one end of the dosing pipe 8 is connected to the dosing port on the pure water pipeline 3, and the other end of the dosing pipe 8 connected to the dosing pump 7 is connected to the medicine box 9; specifically, the dosing port is arranged on the same side as the first water outlet pipe 5, and the detection point is arranged on the same side as the second water outlet pipe 6. The above-mentioned distribution structure of the dosing port and the detection point is conducive to adding medicine at the upstream position of the pure water pipeline 3, which is then sent out through the second water outlet pipe 6 after being stirred by the impeller, and the detection point arranged on the same side of the second water outlet pipe 6 allows the evenly stirred medicine liquid to pass through the detection point, which is conducive to improving the detection accuracy of the PH sensor.

[0025] The dosing port and the detection point are distributed in the pure water pipeline 3 (before entering the insulated water tank 1). The water temperature range of the pure water pipeline 3 is 5-20°C, which meets the working temperature requirement of the sensor. Adding a mixing device in the pure water pipeline 3 can ensure that the drug solution is mixed evenly.

[0026] Controlled by the liquid level of the insulated water tank 1, when water replenishment is needed, the pH regulating system dosing pump 7 starts first before the water pump 4.

[0027] Set the pH control range to 8.5-9.5, and the stable value to 9.0; when the detection value is less than 8.5, the operation load of the dosing pump 7 is 100%; when the detection value is greater than 8.5 and less than 9.0, the operation load of the dosing pump 7 is 50%; when the detection value is greater than 9.0, the operation load of the dosing pump 7 is 20%;

[0028] The technical solution has a simple structure, a novel design, good uniformity of the liquid medicine, and improves the service life of the pH sensor.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Industrial boiler water quality PH adjustment monitoring system, characterized by: The invention comprises a pure water pipeline (3) arranged between a heat preservation water tank (1) and a pure water tank (2); one end of the pure water pipeline (3) is connected to the pure water tank (2) via a first water outlet pipe (5) connected to a water pump (4); and the other end of the pure water pipeline (3) is connected to the heat preservation water tank (1) via a second water outlet pipe (6); a drug adding port and a detection point for installing a pH sensor are provided on the pure water pipeline (3); the drug adding port is connected to the drug tank (9) via a drug adding device; and a mixing device is provided inside the pure water pipeline (3) for uniformly mixing the drug liquid transported therein.

2. The industrial boiler water quality PH adjustment monitoring system according to claim 1 is characterized by: The mixing device comprises a rotating shaft (10) and an impeller (11); brackets (12) are fixed on the inner walls of both ends of the pure water pipeline (3); and the two ends of the rotating shaft (10) arranged in the pure water pipeline (3) are rotatably mounted on the brackets (12) at the corresponding ends through bearings; one or more impellers (11) are fixed on the rotating shaft (10); and the rotating shaft (10) drives the impellers (11) to rotate under the action of the flowing medicinal liquid to stir and homogenize the medicinal liquid in the pure water pipeline (3).

3. The industrial boiler water quality PH adjustment monitoring system according to claim 2 is characterized in that: The support (12) comprises a central ring (12-1) and a plurality of support rods (12-2) uniformly distributed on the outer circumferential wall of the ring (12-1); the outer ends of the plurality of support rods (12-2) are fixed to the inner wall of the end of the pure water pipeline (3); and a bearing adapted to be connected to the end of the rotating shaft (10) is installed in the ring (12-1).

4. The industrial boiler water quality PH adjustment monitoring system according to claim 1, 2 or 3, characterized in that: The dosing device comprises a dosing pump (7) and a dosing pipe (8), one end of the dosing pipe (8) is connected to a dosing port on a pure water pipeline (3), and the other end of the dosing pipe (8) connected to the dosing pump (7) is connected to a medicine box (9).

5. The industrial boiler water quality PH adjustment monitoring system according to claim 4 is characterized in that: The drug adding port is arranged on the same side as the first water outlet pipe (5), and the detection point is arranged on the same side as the second water outlet pipe (6).

Images