Automatic dosing device for scale inhibitor

Abstract

The utility model discloses an automatic dosing device for a scale inhibitor. A collecting unit comprises a circulating water replenishing sampling pipe, a cooling tower circulating water pool sampling pipe and a scale inhibitor sampling pipe, the circulating water replenishing sampling pipe and the cooling tower circulating water pool sampling pipe respectively distribute fluid in the circulating water replenishing pipeline and the cooling tower circulating water pool to a control center for water quality sampling detection; the scale inhibitor sampling pipe distributes fluid in the scale inhibitor supply pipeline to a control center for scale inhibitor sampling detection; and the control center comprises a circulating water replenishing water quality sensor, a circulating water quality sensor, a scale inhibitor concentration sensor and a PLC (Programmable Logic Controller). One end of the circulating water replenishing water quality sensor, one end of the circulating water quality sensor and one end of the scale inhibitor concentration sensor are connected to the circulating water replenishing sampling pipe, the cooling tower circulating water pool sampling pipe and the scale inhibitor sampling pipe respectively, and the other ends of the circulating water replenishing water quality sensor, the circulating water quality sensor and the scale inhibitor concentration sensor are electrically connected with the PLC. The device can monitor the pipeline in real time and add chemicals in time according to the working condition of the pipeline, so that time and labor are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial circulating cooling water, in particular to an automatic dosing device for scale inhibitors. Background Art

[0002] During power generation, cooling of equipment and media such as oil and hydrogen is primarily accomplished through industrial circulating cooling water. Scaling is a common problem in industrial circulating cooling water systems, posing significant risks to equipment operation and production safety. To prevent scaling, adding scale inhibitors to industrial circulating cooling water systems is a common approach.

[0003] Currently, scale inhibitor dosing in industrial circulating cooling water systems relies primarily on manual addition, and dosage control is primarily achieved through manual testing and manual adjustment of dosing pump frequency. This leads to labor-intensive and uneven dosing, as well as delayed test results, resulting in costly and inaccurate control.

[0004] In summary, current technology cannot achieve the goal of refined management, and an automatic scale inhibitor dosing device is needed that can realize real-time water quality testing and real-time control of dosing amount. Utility Model Content

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the utility model provides an automatic dosing device for scale inhibitors. By measuring the water quality and quantity of the circulating water tower pool water and the circulating water makeup water and measuring the concentration and dosage of the scale inhibitor, the operator or the system can determine the required dosage of the scale inhibitor, and achieve efficient and refined dosing by adjusting the dosing pump and the water makeup water. This not only replaces the traditional manual sampling and testing method and saves time, but also realizes more timely and accurate dosing control of the circulating water scale inhibitor, realizes rational and accurate dosing, improves the scale inhibition effect, reduces pipeline corrosion, further ensures the operation safety of the industrial circulating water system, and improves the economic benefits of the industrial circulating water system.

[0006] In order to achieve the above-mentioned purpose, the present utility model provides the following technical solutions.

[0007] An automatic scale inhibitor dosing device includes a collection unit and a control center. The collection unit includes a circulating water make-up sampling pipe, a cooling tower circulating water pool sampling pipe and a scale inhibitor sampling pipe; the circulating water make-up sampling pipe and the cooling tower circulating water pool sampling pipe respectively divert the fluid in the circulating water make-up pipe and the cooling tower circulating water pool to the control center for water quality sampling and detection; the scale inhibitor sampling pipe diverts the fluid in the scale inhibitor supply pipe to the control center for scale inhibitor sampling and detection; the control center includes a circulating water make-up water quality sensor, a circulating water quality sensor, a scale inhibitor concentration sensor and a PLC; the circulating water make-up water quality sensor, the circulating water quality sensor and the scale inhibitor concentration sensor are respectively connected to the circulating water make-up sampling pipe, the cooling tower circulating water pool sampling pipe and the scale inhibitor sampling pipe at one end, and electrically connected to the PLC at the other end.

[0008] As a further improvement of the present invention, sampling pumps are installed on the circulating water replenishment sampling pipe, the cooling tower circulating water pool sampling pipe, and the scale inhibitor sampling pipe.

[0009] As a further improvement of the present invention, it also includes a scale inhibitor dosing unit; the scale inhibitor dosing unit includes a scale inhibitor tank, a scale inhibitor electric valve, a scale inhibitor flow meter and a dosing pump; one end of the scale inhibitor supply pipe is connected to the scale inhibitor tank, and the other end is connected to the cooling tower circulating water pool; the scale inhibitor electric valve, scale inhibitor flow meter and dosing pump are arranged on the scale inhibitor supply pipe; the scale inhibitor sampling pipe is connected to the scale inhibitor supply pipe, and the flow direction along the pipeline is the inflow end of the scale inhibitor sampling pipe, and the inflow end of the scale inhibitor sampling pipe is arranged before the scale inhibitor electric valve, scale inhibitor flow meter and dosing pump.

[0010] As a further improvement of the present invention, it also includes a circulating water replenishment unit; the circulating water replenishment unit includes a circulating water replenishment electric valve and a circulating water replenishment flowmeter; one end of the circulating water replenishment pipeline is connected to the system circulating water pipeline, and the other end is connected to the cooling tower circulating water pool; the circulating water replenishment electric valve and the circulating water replenishment flowmeter are arranged and connected to the circulating water replenishment pipeline; the circulating water replenishment sampling pipe is connected to the circulating water replenishment pipeline, and the flow direction along the pipeline is the inflow end of the circulating water replenishment sampling pipe, and the inflow end of the circulating water replenishment sampling pipe is arranged before the circulating water replenishment electric valve and the circulating water replenishment flowmeter.

[0011] As a further improvement of the present invention, the circulating water replenishment water quality sensor and the circulating water quality sensor both include: a hardness tester, an alkalinity tester, a phenolphthalein tester, a chloride ion tester and a calcium ion tester.

[0012] As a further improvement of the present invention, the antiscalant dosing pump is a variable frequency metering pump.

[0013] As a further improvement of the present invention, the scale inhibitor flowmeter and the circulating water replenishment flowmeter are electromagnetic flowmeters.

[0014] As a further improvement of the present invention, the scale inhibitor supply pipeline adopts a steel-plastic composite pipe.

[0015] As a further improvement of the present invention, the PLC also includes a data module, a display module and a control module; the data module is electrically connected to the circulating water make-up flow meter, the scale inhibitor flow meter, the circulating water make-up water quality sensor, the circulating water quality sensor, and the scale inhibitor concentration sensor; the display module is used to display the data collected by the data module for the operator to determine the control parameters; the control module is used to output control signals to the circulating water make-up electric valve, the scale inhibitor electric valve and the dosing pump for regulation according to the control parameters.

[0016] As a further improvement of the present invention, the control center further includes an alarm, and the alarm is electrically connected to the control module of the PLC.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This device includes a circulating water replenishment unit, a scale inhibitor dosing unit, a collection unit and a control center, and can realize fully automatic dosing of water replenishment and dosing in parallel with two pipes; and through the collection unit, the fluids in the circulating water replenishment unit, the scale inhibitor dosing unit and the cooling tower circulating water pool are detected in real time, providing a basis for dynamic control, overcoming many problems existing in purely manual or timed and quantitative dosing, such as avoiding material waste caused by extensive dosing or accelerated scale accumulation caused by untimely replenishment, thereby improving the guarantee of safe and stable operation of the cooling tower circulating water pool and improving the economic benefits of the circulating water system operation; this device is simple in design, economical and practical, and can realize refined management of scale inhibitor dosing, providing a set of efficient and feasible devices for green and safe power plant circulating water cooling and industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are merely schematic and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings:

[0020] Figure 1 This is an overall schematic diagram of the automatic scale inhibitor dosing device of the utility model;

[0021] In the figure, 1. Scale inhibitor tank, 2. Scale inhibitor electric valve, 3. Scale inhibitor flow meter, 4. Scale inhibitor dosing pump, 5. Circulating water make-up electric valve, 6. Circulating water make-up flow meter, 7. Control center, 8. Cooling tower circulating water pool, 9. Cooling tower, 10. Circulating water make-up pipe, 11. Scale inhibitor supply pipe, 12. Circulating water make-up sampling pipe, 13. Scale inhibitor sampling pipe, 14. Cooling tower circulating water pool sampling pipe. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] The circulating water replenishment unit in the present invention provides circulating water replenishment; the scale inhibitor dosing unit provides scale inhibitor; the collection unit is used for sampling and detection; the control center 7 collects, records, calculates and outputs control signals on the collected data to achieve closed-loop control of the circulating water replenishment pipeline 10 and the scale inhibitor supply pipeline 11.

[0025] The technical solution of the present utility model is further described below.

[0026] like Figure 1 As shown, an automatic scale inhibitor dosing device of the present invention includes a circulating water replenishment unit, a scale inhibitor dosing unit, a collection unit and a control center 7.

[0027] One end of the circulating water replenishment unit is connected to the system circulating water pipeline, and the other end is connected to the cooling tower circulating water pool 8; the circulating water replenishment pipeline 10 is connected to the circulating water replenishment electric valve 5 and the circulating water replenishment flowmeter 6 in sequence.

[0028] One end of the antiscalant dosing unit is connected to the antiscalant tank 1, and the other end is connected to the cooling tower circulating water pool 8; the antiscalant supply pipe 11 is connected to the antiscalant tank 1, the antiscalant electric valve 2, the antiscalant flowmeter 3, and the antiscalant dosing pump 4 in sequence.

[0029] The collecting unit shunts the fluid in the circulating water makeup pipeline 10 to the control center 7 through the circulating water makeup sampling pipe 12 for sampling detection.

[0030] The collecting unit shunts the fluid in the circulating water makeup pipeline 10 to the control center 7 through the circulating water makeup sampling pipe 12 for sampling detection.

[0031] The collecting unit shunts the fluid in the circulating water makeup pipeline 10 to the control center 7 through the circulating water makeup sampling pipe 12 for sampling detection.

[0032] The collecting unit shunts the fluid in the circulating water makeup pipeline 10 to the control center 7 through the circulating water makeup sampling pipe 12 for sampling detection.

[0033] The circulating water makeup sampling pipe 12 and the scale inhibitor sampling pipe 13 are arranged before the circulating water makeup electric valve 5 and the scale inhibitor electric valve 2 along the flow direction of the pipeline respectively.

[0034] The control center 7 is provided with a circulating water makeup water quality sensor, a circulating water quality sensor and a scale inhibitor concentration sensor, so that various data indexes can be tested, including hardness, alkalinity, phenolphthalein alkalinity, chlorine ion concentration and calcium ion concentration.

[0035] The control center 7 is further provided with other automatic detection devices to collect various indexes of circulating water volume, circulating water makeup volume, scale inhibitor dosage, circulating water evaporation volume, circulating water blowdown volume and circulating water concentration ratio.

[0036] As shown in the accompanying drawings, Figure 1 The scale inhibitor flow meter 3 and the circulating water makeup flow meter 6 are electrically connected with the data module of the PLC in the control center 7 respectively.

[0037] The control center 7 also collects data from the antiscalant flow meter 3 and the circulating water replenishment flow meter 6 at the same time, and records the data in the data module of the PLC.

[0038] The display module of the PLC in the control center 7 is used to display the data provided by the data module for the operator or system to determine the control parameters and transmit them to the control module of the PLC.

[0039] The antiscalant electric valve 2 , the circulating water replenishment electric valve 5 , and the antiscalant dosing pump 4 are electrically connected to the control module of the PLC in the control center 7 , respectively.

[0040] The control module sends a signal to the scale inhibitor dosing pump 4, adjusting the pump's frequency and thus controlling the scale inhibitor dosage. The control center 7 continuously collects data from circulating water makeup, scale inhibitor, and circulating water samples, as well as data collected by other automatic detection devices, and data from the scale inhibitor flowmeter 3 and circulating water makeup flowmeter 6, allowing the operator or system to determine control parameters and adjust the scale inhibitor dosage at the next moment. This cycle repeats. The device can use the collection unit to sample the circulating water makeup, scale inhibitor, and circulating water in real time, automatically control the dosing pump using data-based means, and regulate the flow rate of the scale inhibitor supply pipeline 11. This allows the makeup water and dosage to be promptly adjusted to reflect changes in water quality, quantity, and other indicators in the cooling tower circulating water tank 8. This achieves reasonable and timely dynamic control of scale inhibitor dosage and makeup water, achieving an optimal ratio of scale inhibitor and makeup water to achieve a highly effective scale inhibition effect.

[0041] The scale inhibitor dosing pump 4 is a variable frequency metering pump, the scale inhibitor flow meter 3 is an electromagnetic flow meter, and the circulating water replenishment flow meter 6 is an electromagnetic flow meter.

[0042] The control module of the PLC in the control center 7 is also connected to an alarm; when a certain detection indicator is abnormal or exceeds the monitoring standard, the alarm sounds to remind the operator.

[0043] The pipes used in the automatic scale inhibitor dosing device are all made of steel-plastic composite pipes. These pipes are hygienic, non-toxic, and prevent scale and microbial growth, ensuring fluid quality. They are also resistant to chemical corrosion, soil and biological corrosion, and cathodic disbonding. Their smooth inner walls improve conveying efficiency and extend service life.

[0044] To sum up, the automatic scale inhibitor dosing device proposed in the present invention realizes automatic dosing by adjusting the dosing pump frequency according to the test results through online testing of scale inhibitor concentration and dosage, circulating water replenishment, and circulating water samples. Compared with the manual dosing method, it reduces labor costs and improves the timeliness and accuracy of dosing. At the same time, it avoids the waste of materials caused by extensive dosing or the accumulation of scale caused by untimely replenishment, thereby ensuring the safe and stable operation of the industrial circulating water system and improving economic benefits.

[0045] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention without requiring experimentation or innovation should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

[0046] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of the present teachings should be determined not with reference to the foregoing description, but rather with reference to the preceding claims, along with the full scope of equivalents to which such claims are entitled. For the purpose of completeness, all articles and references, including the disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the preceding claims is not a disclaimer of such subject matter, nor should it be construed that the applicants did not consider such subject matter to be part of the disclosed utility model subject matter.

[0047] The above content is a further detailed description of the utility model. It cannot be determined that the specific implementation methods of the utility model are limited to this. For ordinary technicians in the technical field to which the utility model belongs, they can make several simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as belonging to the scope of protection of the utility model determined by the submitted claims.

Claims

1. An automatic dosing device for scale inhibitors, characterized by: Including acquisition unit and control center (7), The collection unit includes a circulating water replenishment sampling pipe (12), a cooling tower circulating water pool sampling pipe (14) and a scale inhibitor sampling pipe (13); The circulating water supply sampling pipe (12) and the cooling tower circulating water pool sampling pipe (14) respectively divert the fluid in the circulating water supply pipe (10) and the cooling tower circulating water pool (8) to the control center (7) for water quality sampling and testing; The antiscalant sampling pipe (13) diverts the fluid in the antiscalant supply pipe (11) to the control center (7) for antiscalant sampling and testing; The control center (7) includes a circulating water replenishment water quality sensor, a circulating water quality sensor, a scale inhibitor concentration sensor and a PLC; The circulating water replenishment water quality sensor, the circulating water quality sensor, and the scale inhibitor concentration sensor are respectively connected at one end to the circulating water replenishment sampling pipe (12), the cooling tower circulating water pool sampling pipe (14), and the scale inhibitor sampling pipe (13), and the other end is electrically connected to the PLC.

2. The automatic dosing device for scale inhibitor according to claim 1, characterized in that: The circulating water replenishment sampling pipe (12), the cooling tower circulating water pool sampling pipe (14), and the scale inhibitor sampling pipe (13) are all equipped with sampling pumps.

3. The automatic dosing device for scale inhibitor according to claim 1, characterized in that: It also includes an antiscalant dosing unit; the antiscalant dosing unit includes an antiscalant tank (1), an antiscalant electric valve (2), an antiscalant flow meter (3) and a dosing pump (4); One end of the antiscalant supply pipe (11) is connected to the antiscalant tank (1), and the other end is connected to the cooling tower circulating water pool (8); The scale inhibitor electric valve (2), scale inhibitor flow meter (3), and dosing pump (4) are arranged on the scale inhibitor supply pipeline (11); The scale inhibitor sampling pipe (13) is connected to the scale inhibitor supply pipe (11), and the flow direction of the pipe is the inflow end of the scale inhibitor sampling pipe (13). The inflow end of the scale inhibitor sampling pipe (13) is arranged before the scale inhibitor electric valve (2), the scale inhibitor flow meter (3) and the dosing pump (4).

4. The automatic dosing device for scale inhibitor according to claim 1, characterized in that: It also includes a circulating water replenishment unit; the circulating water replenishment unit includes a circulating water replenishment electric valve (5) and a circulating water replenishment flow meter (6); One end of the circulating water supply pipe (10) is connected to the system circulating water pipeline, and the other end is connected to the cooling tower circulating water pool (8); The circulating water replenishment electric valve (5) and the circulating water replenishment flowmeter (6) are arranged on the circulating water replenishment pipeline (10); The circulating water replenishment sampling tube (12) is connected to the circulating water replenishment pipeline (10), and the inflow end of the circulating water replenishment sampling tube (12) is located along the flow direction of the pipeline. The inflow end of the circulating water replenishment sampling tube (12) is arranged before the circulating water replenishment electric valve (5) and the circulating water replenishment flow meter (6).

5. The automatic dosing device for scale inhibitor according to any one of claims 2 to 4, characterized in that: The circulating water replenishment water quality sensor and the circulating water quality sensor both include: a hardness tester, an alkalinity tester, a phenolphthalein tester, a chloride ion tester and a calcium ion tester.

6. The automatic dosing device for scale inhibitor according to claim 3, characterized in that: The dosing pump (4) is a variable frequency metering pump.

7. The automatic antiscalant dosing device according to claim 3, characterized in that: The antiscalant flowmeter (3) is an electromagnetic flowmeter.

8. The automatic dosing device for scale inhibitor according to claim 5, characterized in that: The scale inhibitor supply pipeline (11) is a steel-plastic composite pipe.

9. The automatic dosing device for scale inhibitor according to claim 1, characterized in that: The PLC also includes a data module, a display module and a control module; The data module is electrically connected to the circulating water replenishment flow meter (6), the scale inhibitor flow meter (3), the circulating water replenishment water quality sensor, the circulating water quality sensor, and the scale inhibitor concentration sensor; The display module is used to display the data collected by the data module for the operator to determine the control parameters; The control module is used to output control signals to the circulating water replenishment electric valve (5), the scale inhibitor electric valve (2) and the dosing pump (4) for regulation according to the control parameters.

10. The automatic dosing device for scale inhibitors according to claim 9, characterized in that: The control center (7) also includes an alarm, which is electrically connected to the control module of the PLC.

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