Automatic dispensing and adding device for industrial circulating water scale inhibitor

Abstract

The utility model discloses an automatic dispensing and adding device for an industrial circulating water scale inhibitor. The automatic dispensing and adding device comprises a scale inhibitor stock solution storage box, a scale inhibitor stock solution mass flow control pipeline, a scale inhibitor dispensing box, an industrial water replenishing pipeline, a scale inhibitor adding pipeline, a circulating water analysis instrument and an automatic control system. When the scale inhibitor stock solution flows through a mass flow sensor, the volume of the stock solution at the time period is accurately metered and controlled, and then industrial water replenishing is automatically controlled through the real-time liquid level of the scale inhibitor dispensing box, so that the fixed-concentration dispensing of the scale inhibitor is realized; meanwhile, the frequency of the dosing metering pump is automatically adjusted through the collected circulating water quality data, the circulating water quality is effectively guaranteed, operation is easy, and running is stable.

Description

Technical Field

[0001] This utility model belongs to the field of automated control of scale inhibitor preparation and dosing in industrial circulating water, and relates to an automatic preparation and dosing device for scale inhibitors in industrial circulating water. Background Technology

[0002] Water resources are one of my country's important strategic resources. Implementing water conservation and emission reduction strategies is of great significance to the sustainable development of society and economy and to the protection of the human living environment.

[0003] Urban wastewater typically exhibits high levels of colloids, organic matter, total phosphorus, alkalinity, and hardness, requiring further treatment to meet the process water requirements of thermal power plants. Currently, most thermal power plants rely on manual control for circulating water quality analysis, scale inhibitor preparation, and dosing. The instability of the prepared agent concentration directly impacts the scale inhibition effect, and unstable water quality easily leads to scaling in the circulating water system, thereby affecting unit heat exchange. Furthermore, this process also results in the waste of both chemicals and water resources. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic dosing and preparation device for scale inhibitors in industrial circulating water. This device achieves automatic control of fixed concentration preparation and dosing of scale inhibitors by controlling the mass flow rate and density of the scale inhibitor and the corresponding dosing pump, thereby reducing workload and improving the level of automation control for scale inhibitor dosing in circulating water.

[0005] To achieve the above objectives, this utility model discloses an automatic dosing and injection device for scale inhibitors in industrial circulating water, including a scale inhibitor stock solution storage tank, a scale inhibitor stock solution mass flow control pipeline, a scale inhibitor dosing tank, an industrial water makeup pipeline, a scale inhibitor injection pipeline, circulating water analysis instruments, and an automatic control system.

[0006] The mass flow control pipeline for the scale inhibitor concentrate is connected to the bottom of the scale inhibitor concentrate storage tank, and is also connected to the lower part of the scale inhibitor dosing tank; the industrial water makeup pipeline is connected from the top of the scale inhibitor dosing tank, the scale inhibitor dosing pipeline is connected to the bottom of the scale inhibitor dosing tank, and the dosing pipeline is connected to the dosing point of the circulating water system; the circulating water tower is connected to the sampling pipeline of the circulating water analysis instrument; at the same time, all control and monitoring points are introduced into the automatic control system.

[0007] Furthermore, the scale inhibitor stock solution storage tank is equipped with a magnetic float level gauge with remote transmission function.

[0008] Furthermore, the scale inhibitor stock solution mass flow control pipeline is sequentially equipped with an electric valve, a filter, a booster pump, a mass flow sensor, and a manual valve at the flow meter outlet along the flow direction of the scale inhibitor.

[0009] Furthermore, the scale inhibitor mixing tank is equipped with a magnetic level gauge with remote transmission function.

[0010] Furthermore, the top of the scale inhibitor dosing tank is equipped with a manual inlet valve, a filter, and an electric valve in sequence along the industrial water flow direction.

[0011] Furthermore, the bottom of the scale inhibitor dosing tank is equipped with a manual dosing valve, a metering pump, a check valve, and an outlet manual valve in sequence along the flow direction of the scale inhibitor, and the dosing pipeline is connected to the dosing point of the circulating water system.

[0012] Furthermore, the circulating water tower is connected to a sampling pipeline for circulating water analysis instruments, which monitor the quality of the circulating water online.

[0013] Furthermore, it also includes an automatic control system, which interacts with control and monitoring points within the system, and the touch screen enables human-computer interaction and historical data query functions.

[0014] This utility model has the following beneficial effects:

[0015] In practical operation, the scale inhibitor concentrate flowing through the scale inhibitor dosing tank of this utility model uses a mass flow sensor to accurately measure and control the volume of the concentrate during a given period. The system then automatically controls industrial water replenishment based on the real-time liquid level of the scale inhibitor dosing tank, achieving a fixed concentration of scale inhibitor. Simultaneously, the frequency of the dosing pump is automatically adjusted based on collected circulating water quality data, effectively ensuring that the circulating water quality meets control requirements. The device is simple to operate, safe, stable, and highly practical. Attached Figure Description

[0016] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 Structural diagram of this utility model.

[0018] Among them, 1 is the magnetic float level gauge for the scale inhibitor stock solution storage tank, 2 is the electric valve for scale inhibitor dosing, 3 is the Y-type filter, 4 is the booster pump, 5 is the mass flow sensor, 6 is the manual valve at the flow meter outlet, 7 is the magnetic float level gauge for the scale inhibitor dosing tank, 8 is the manual valve for industrial water supply, 9 is the Y-type filter for industrial water supply, 10 is the electric valve for industrial water supply, 11 is the manual valve for dosing, 12 is the metering pump for dosing, 13 is the check valve, 14 is the manual valve at the outlet of the dosing pump, 101 is the scale inhibitor stock solution storage tank, 102 is the scale inhibitor dosing tank, 103 is the circulating water analysis instrument, and 104 is the automatic control system. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them, and are not intended to limit the scope of the present invention. Furthermore, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion regarding the concepts disclosed in the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0020] The accompanying drawings show structural schematic diagrams according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0021] refer to Figure 1 The present invention relates to an automatic dosing and injection device for scale inhibitors in industrial circulating water, comprising a scale inhibitor stock solution storage tank, a scale inhibitor stock solution mass flow control pipeline, a scale inhibitor dosing tank, an industrial water makeup pipeline, a scale inhibitor injection pipeline, circulating water analysis instruments, and an automatic control system.

[0022] Example 1

[0023] The scale inhibitor stock solution mass flow control pipeline is connected to the bottom of the scale inhibitor stock solution storage tank 101. The scale inhibitor stock solution mass flow control pipeline is sequentially equipped with a scale inhibitor dosing electric valve 2, a Y-type filter 3, a booster pump 4, a mass flow sensor 5, and a flow meter outlet manual valve 6. The flow meter outlet manual valve 6 is connected to the lower part of the scale inhibitor dosing tank 102. The industrial water makeup pipeline is connected to the top of the scale inhibitor dosing tank 102. The industrial water makeup pipeline is sequentially equipped with an industrial water makeup manual valve 8, an industrial water makeup Y-type filter 9, and an industrial water makeup electric valve 10. At the same time, the bottom of the scale inhibitor dosing tank 102 is connected to the scale inhibitor dosing pipeline. The scale inhibitor dosing pipeline is sequentially equipped with a dosing manual valve 11, a dosing metering pump 12, a one-way valve 13, and a dosing pump outlet manual valve 14. The dosing pipeline is connected to the dosing point of the circulating water system. The circulating water tower is connected to the sampling pipeline of the circulating water analysis instrument 103. At the same time, all control and monitoring points are introduced into the automatic control system 104.

[0024] When preparing scale inhibitor for the first time, firstly, the scale inhibitor stock solution storage tank 101 should contain a certain level of scale inhibitor stock solution. Manually open the flow meter outlet manual valve 6. After the scale inhibitor dosing electric valve 2 is opened, the automatic control system 104 starts accumulating the flow from the mass flow sensor 5. If the mass flow is low, the control system 104 starts the booster pump 4. When the accumulated flow reaches the specified value, the control system 104 automatically shuts off the booster pump 4 and the dosing electric valve 2. After the scale inhibitor is added, manually open the industrial water supply manual valve 8. The control system 104 automatically opens the industrial water supply electric valve 10. At this time, the industrial water supply electric valve 10 is controlled by the liquid level interlock of the scale inhibitor dosing tank 102. When the set dosing endpoint liquid level is reached, the automatic dosing is completed.

[0025] The scale inhibitor dosing tank 102 is connected to the scale inhibitor dosing pipeline at the bottom. When the scale inhibitor is added, the manual dosing valve 11 and the manual dosing pump outlet valve 14 are kept open. The data from the circulating water analysis instrument 103 is introduced to the automatic control system 104. The control system 104 automatically adjusts the frequency of the dosing metering pump 12 based on the water quality control target and the real-time data deviation value.

[0026] As one embodiment of this utility model, the scale inhibitor stock solution storage tank 101 and the scale inhibitor dosing tank 102 are both magnetic float level gauges with remote transmission function.

[0027] In one embodiment of this utility model, the automatic control system 104 transmits data in real time to the scale inhibitor stock solution storage tank level gauge 1, the scale inhibitor dosing electric valve 2, the booster pump 4, the mass flow sensor 5, the scale inhibitor dosing tank 102 level gauge 7, the industrial water replenishment electric valve 10, the dosing metering pump 12, and the circulating water analysis instrument 103. Human-machine interaction control is performed through a touch screen, and users can view the detection data and set the control parameters through the touch screen.

[0028] Example 2

[0029] This embodiment is based on the automatic dosing and application device for industrial circulating water scale inhibitors described in Embodiment 1, and includes the following steps:

[0030] 1) The scale inhibitor stock solution storage tank 101 contains a certain liquid level of scale inhibitor stock solution. If the liquid level is low, relevant personnel will be prompted to replenish the scale inhibitor stock solution in time.

[0031] 2) Scale inhibitor preparation operation: Open the manual valve 6 at the flow meter outlet and the manual valve 8 for industrial water supply. When the liquid level in the scale inhibitor preparation tank 102 reaches the set low preparation level, the automatic control system 104 interlocks and opens the electric valve 2 for scale inhibitor preparation and the booster pump 4. It then calculates the mass flow rate and density output from the mass flow sensor 5: V = Q / ρ. The flow rate is then accumulated to obtain the volume of the original scale inhibitor solution entering the scale inhibitor preparation tank 102 within a time interval Δt. When the volume of the original scale inhibitor solution V... 原总 = Set volume V 设总 Afterwards, the current dosing and feeding operation ends. After the dosing is completed, the control system 104 interlocks and opens the industrial water supply electric valve 10 according to the liquid level of the scale inhibitor dosing tank 102. When the liquid level in the dosing tank reaches the set dosing endpoint level, the industrial water supply electric valve 10 is interlocked and closed, thus completing one automatic dosing cycle.

[0032] Furthermore, once an automatic dispensing operation is completed, the control system 104 resets the mass flow rate and density of the previous mass flow sensor 5 to zero, preparing for the next dispensing operation.

[0033] Furthermore, the mass flow sensor 5 simultaneously measures mass flow rate and density, which can prevent the scale inhibitor concentration from becoming unstable due to changes in the scale inhibitor density.

[0034] 3) Scale inhibitor dosing operation: Activate the circulating water analysis instrument 103 to monitor the circulating water quality in real time, and open the manual dosing valve 11 and the manual dosing pump outlet valve 14 at the same time and keep them open; the automatic control system 104 automatically adjusts the frequency of the dosing metering pump 12 according to the water quality control target and the real-time data deviation value.

[0035] Furthermore, the dosing metering pump 12 is a diaphragm pump, which is resistant to acid and alkali corrosion and is equipped with a frequency converter for control.

[0036] Furthermore, the control system 104 automatically adjusts the frequency of the dosing metering pump 12 by introducing a PID algorithm block based on the water quality control target and the real-time data deviation value.

[0037] It should be noted that the device described in this utility model realizes the preparation of a fixed concentration of scale inhibitor and automatic control of dosing by using scale inhibitor density, mass flow rate and corresponding dosing pump. It is simple to operate, reduces workload and improves the level of automation control of scale inhibitor dosing in circulating water.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. An automatic dosing and adding device for industrial circulating water scale inhibitor, characterized in that, The system comprises a scale inhibitor stock tank (101), a scale inhibitor stock mass flow control pipeline, a scale inhibitor dosing tank (102), an industrial water makeup pipeline, a scale inhibitor dosing pipeline, a circulating water analyzer (103) and an automatic control system (104), The scale inhibitor stock mass flow control pipeline is connected with the bottom of the scale inhibitor stock tank (101) and the lower part of the scale inhibitor dosing tank (102), the industrial water makeup pipeline is connected with the top of the scale inhibitor dosing tank (102), the scale inhibitor dosing pipeline is connected with the bottom of the scale inhibitor dosing tank (102), the circulating water tower is connected with the sampling pipeline of the circulating water analyzer (103), and all the control and monitoring points are introduced into the automatic control system (104).

2. The automatic dosing and adding device for industrial circulating water scale inhibitor according to claim 1, characterized in that, The scale inhibitor stock mass flow control pipeline is sequentially provided with a scale inhibitor dosing electric valve (2), a Y-type filter (3), a booster pump (4), a mass flow sensor (5) and a flowmeter outlet manual valve (6).

3. The automatic dosing and adding device for industrial circulating water scale inhibitor according to claim 1, characterized in that, The industrial water makeup pipeline is connected with the top of the scale inhibitor dosing tank (102) and sequentially provided with an industrial water makeup manual valve (8), an industrial water makeup Y-type filter (9) and an industrial water makeup electric valve (10).

4. The automatic dosing and adding device for industrial circulating water scale inhibitor according to claim 1, characterized in that, The scale inhibitor dosing tank (102) is connected with the scale inhibitor dosing pipeline, the scale inhibitor dosing pipeline is sequentially provided with a dosing manual valve (11), a dosing metering pump (12), a one-way valve (13) and a dosing pump outlet manual valve (14), and the dosing pipeline is connected with a dosing point of a circulating water system.

5. The automatic dosing and feeding device for industrial circulating water scale inhibitor according to claim 1, characterized in that, The scale inhibitor stock tank (101) and the scale inhibitor dosing tank (102) are provided with remote transmission magnetic flap liquid level meters.

6. The automatic dosing and feeding device for industrial circulating water scale inhibitor according to claim 2, characterized in that, The mass flow sensor (5) can accurately measure mass flow and density at the same time.

7. The automatic dosing and adding device for industrial circulating water scale inhibitor according to claim 4, characterized in that, The dosing metering pump (12) is a diaphragm pump which is resistant to acid and alkali corrosion.

8. The automatic dosing and feeding device for industrial circulating water scale inhibitor according to claim 1, characterized in that, The automatic control system (104) realizes automatic adjustment of the frequency of the dosing metering pump (12) by introducing a PID algorithm block based on water quality control targets and real-time data deviation values.

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