Automatic alkali adding device

Abstract

The utility model provides an automatic alkali adding device which comprises a chemical adding tank, a chemical adding pump, a water return pipeline, a first PH monitoring meter and a controller, the first PH monitoring meter is used for monitoring the PH value of liquid in the water return pipeline and is in communication connection with the input end of the controller, and the controller controls the chemical adding pump to start and stop according to data monitored by the first PH monitoring meter. The alkaline solution in the dosing tank is conveyed to the water return pipeline, so that the pH value of the circulating water is controlled within a reasonable range. According to the automatic alkali adding device provided by the utility model, the accurate sensing equipment and the automatic control system are used, so that the uniform dosing can be ensured, the alkalinity of circulating water is monitored in real time, the alkali adding dosage is automatically adjusted, the pH value of feed water is controlled within a reasonable range, and the purposes of prolonging the service life of pipe network equipment and ensuring the safe and stable operation of a heat supply system are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating, and specifically relates to an automatic alkali adding device. Background Art

[0002] At present, the central heating pipe network heating system has serious oxygen corrosion, which is characterized by local pitting corrosion and strong perforation, which is extremely harmful to the safe operation of the system. According to the relevant provisions of the "Industrial Boiler Water Quality" standard, the pH value of the secondary pipe network circulating water should be controlled within the range of 8 to 9. If the pH value of the circulating water is low, oxygen corrosion and acid corrosion are prone to occur, and CO3 2- The content of calcium sulfate is low, which makes it easy to form CaSO4 scale. Softening treatment alone can prevent scale, but the pH value of softened water is around 6.8 to 7.2, which cannot achieve the best anti-corrosion effect.

[0003] To address this issue, alkaline agents can be added to the circulating water in the pipe network. As the pH of the water increases, oxygen corrosion is significantly reduced. Currently, there are two methods for adding alkaline: 1. Manually adding alkaline agents to the softening water tank. However, this method results in uneven dosing and localized deposition of the agent in the tank, which can cause alkaline corrosion. 2. Automatically adding alkaline to the softening water tank using an alkaline dosing device. This method fails to accurately determine the pH of the circulating water in the system, and can easily lead to excessive alkalinity in the system, causing alkaline corrosion and caustic embrittlement of equipment and pipelines. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the present invention provides an automatic alkali-adding device, comprising a dosing tank, a dosing pump, a return pipe, a first pH monitor and a controller, wherein the first pH monitor is used to monitor the pH value of the liquid in the return pipe, and the first pH monitor is communicatively connected to the input end of the controller, and the controller controls the start and stop of the dosing pump according to the data monitored by the first pH monitor, so that the alkaline solution in the dosing tank is transported to the return pipe, thereby controlling the pH value of the circulating water within a reasonable range. The automatic alkali-adding device provided by the present invention can ensure uniform dosing by using precise sensing equipment and an automatic control system, and can monitor the alkalinity of the circulating water in real time and automatically adjust the amount of alkali added, thereby controlling the pH value of the feed water within a reasonable range, thereby achieving the purpose of extending the service life of the pipe network equipment and ensuring the safe and stable operation of the heating system.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides an automatic alkali adding device, comprising:

[0006] Dosing tank, used to hold alkaline solution;

[0007] A return water pipe is connected to the dosing tank through a dosing pipe;

[0008] a first pH monitor, provided on the return water pipe, for monitoring the pH value of the solution in the return water pipe;

[0009] The controller is used to control the opening or closing of the dosing pipeline and the flow rate of the alkaline solution flowing to the return water pipeline.

[0010] Optionally, a second pH monitor is provided in the dosing tank for monitoring the pH value of the solution in the dosing tank.

[0011] Optionally, a liquid level sensor is provided in the dosing tank for monitoring the liquid level of the alkaline solution in the dosing tank.

[0012] Optionally, the liquid level sensor is provided with a reminder liquid level, and the reminder liquid level is 0.5m.

[0013] Optionally, the liquid level sensor is provided with an alarm liquid level, and the alarm liquid level is 0.2m.

[0014] Optionally, a dosing pump is provided on the dosing pipeline, and the dosing pump is communicatively connected to the controller.

[0015] Optionally, a flow sensor is provided on the dosing pipeline, and the flow sensor is communicatively connected to the controller.

[0016] Optionally, the controller has a setting unit for setting a range of target pH values in the controller.

[0017] Optionally, the return water pipe is a primary pipe network, and the target pH value is greater than 10 and less than 12.

[0018] Optionally, the return pipe is a secondary pipe network, and the target pH value is greater than 8 and less than 9.

[0019] The automatic alkali adding device provided by the utility model has at least the following beneficial effects:

[0020] 1) It can effectively control the pH value of the secondary network circulating water of the heat exchange station within a reasonable range, which not only prevents oxygen corrosion and scaling of the heating pipe network and extends the service life of the pipe network, but also prevents the damage of the metal film in the heat exchange station and the user's heat exchanger, heat exchanger leakage and other hazards caused by the decomposition, evaporation and concentration of alkaline substances after the circulating water alkalinity exceeds the standard, effectively preventing the occurrence of many safety hazards in the heating operation link, and greatly improving the overall safety and stability of the heating system;

[0021] 2) The device can automatically obtain operating data, such as flow rate and pH value, and can monitor the operating conditions of the alkali dosing equipment in each heating plant and heat exchange station in real time to ensure its safe operation. It also has a remote mode to help station operators and company technicians monitor the system status in real time, understand information such as water tank liquid level and circulating water pH value, and promptly identify operating problems and make adjustments to effectively eliminate safety hazards.

[0022] 3) It alleviates the water leakage caused by pipeline corrosion and avoids the heat waste caused by water leakage, effectively saves energy, significantly reduces heating operation costs, and improves economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic diagram of an automatic alkali adding device provided in an embodiment.

[0024] Figure 2 Shown is a workflow diagram of the automatic alkali adding device provided in the embodiment.

[0025] Component number description

[0026] 1 Dosing tank

[0027] 2 Return pipe

[0028] 3. First pH monitor

[0029] 4 Controller

[0030] 5. Second pH monitor

[0031] 6 Liquid level sensor

[0032] 7 Dosing pipeline

[0033] 8 Dosing pump

[0034] 9 Flow sensor DETAILED DESCRIPTION

[0035] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0036] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner. Although the illustrations only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation, the form, quantity, positional relationship and proportion of each component in actual implementation can be changed at will under the premise of realizing the technical solution of this party, and the component layout form may also be more complicated.

[0037] Example

[0038] This embodiment provides an automatic alkali adding device, such as Figure 1 As shown, it includes a dosing tank 1, a return water pipe 2, a first pH monitor 3 and a controller 4.

[0039] like Figure 1 As shown, the dosing tank 1 is used to hold an alkaline solution. As an example, the alkaline solution can be one of sodium hydroxide, sodium carbonate, sodium phosphate, trisodium phosphate, sodium hexametaphosphate, potassium hydroxide, ammonia water, sodium silicate, and sodium metasilicate, and the specific choice can be based on actual conditions.

[0040] like Figure 1 As shown, the dosing tank 1 is equipped with a second pH monitor 5 for monitoring the pH value of the solution in the dosing tank 1. The operator can adjust the amount of alkaline solution added based on the real-time pH value to ensure that the pH value of the alkaline solution in the dosing tank 1 remains within the optimal range. In this embodiment, the pH of the alkaline solution in the dosing tank 1 is 12. This intelligent monitoring and adjustment mechanism not only improves the accuracy of solution processing, but also greatly simplifies the operating process and reduces human error, thereby ensuring the efficient and stable operation of the automatic alkali dosing device.

[0041] like Figure 1 As shown, a liquid level sensor 6 is provided in the dosing tank 1 for monitoring the liquid level change of the alkaline solution in the dosing tank 1. The liquid level sensor 6 adopts high-precision technology, which can accurately capture the slight change of the liquid level and intuitively present the liquid level information to the operator.

[0042] As an example, the liquid level sensor 6 is provided with a reminder level. In this embodiment, the reminder level is 0.5m. When the real-time liquid level falls below the reminder level, the operator is reminded to replenish the alkaline solution in a timely manner. The liquid level sensor 6 is also provided with an alarm level. In this embodiment, the alarm level is 0.2m. When the real-time liquid level falls below the alarm level, the liquid level sensor 6 automatically sounds an alarm and stops adding alkali. This intelligent monitoring mechanism not only ensures the continuity and stability of the solution supply, but also avoids equipment idling or failure caused by low liquid levels. In addition, the real-time monitoring function of the liquid level sensor 6 helps optimize solution management, reduce waste, and improve the operating efficiency and safety of the automatic alkali addition device.

[0043] like Figure 1 As shown, the return water pipe 2 is connected to the dosing tank 1 through the dosing pipe 7. As an example, the return water pipe 2 can be a primary pipe network or a secondary pipe network. It is responsible for transporting the circulating water after heat exchange back to the pipe network for reheating and distribution. During this process, the pipe is designed to safely and efficiently transport the circulating water containing alkaline solution. These alkaline solutions help neutralize the acidic components in the water, prevent system corrosion, and extend the life of the equipment.

[0044] like Figure 1 As shown, the first pH monitor 3 is provided on the return pipe 2 for monitoring the pH value of the solution in the return pipe 2. The operator can control the flow rate of the alkaline solution delivered to the return pipe 2 according to the pH value of the solution in the return pipe 2 to ensure that the pH value of the circulating water output from the return pipe 2 meets the requirements.

[0045] like Figure 1 As shown, a dosing pump 8 is provided on the dosing pipeline 7, and the dosing pump 8 is used to transport the alkaline solution in the dosing tank 1 to the return water pipeline 2. As an example, the dosing pump 8 is in communication with the controller 4, and the dosing pump 8 is turned on or off according to the instructions of the controller 4, thereby controlling the delivery of the alkaline solution.

[0046] like Figure 1 As shown, a flow sensor 9 is provided on the dosing pipe 7, and the flow sensor 9 is used to monitor the liquid flow in the dosing pipe 7. As an example, the flow sensor 9 is in communication with the controller 4, and the flow sensor 9 transmits the monitored flow data to the controller 4. This automated feedback mechanism not only improves the accuracy and reliability of the dosing process, but also helps to optimize the efficiency of drug use and reduce resource waste.

[0047] like Figure 1 As shown, the input end of the controller 4 is in communication with the first pH monitor 3 and the flow sensor 9, and the output end of the controller 4 is in communication with the dosing pump 8. As an example, the first pH monitor 3 and the flow sensor 9 transmit the collected data to the controller 4, and the controller 4 then sends instructions to the dosing pump 8 based on the above data, thereby controlling the flow rate of the alkaline solution delivered to the return pipe 2.

[0048] As an example, the controller 4 includes a setting unit (not shown in the figure), through which an operator sets a target pH range, i.e., a target pH range for the liquid in the return pipe 2. As an example, if the return pipe 2 is a primary pipe network, the target pH value is greater than 10 and less than 12; if the return pipe 2 is a secondary pipe network, the target pH value is greater than 8 and less than 9.

[0049] As an example, the automatic alkali adding device provided in this embodiment can also be remotely controlled. In the remote mode, the data collected by the first pH monitor 3, the second pH monitor 5, the liquid level sensor 6, and the flow sensor 9, as well as the target pH value set by the setting unit, the reminder liquid level and the alarm liquid level of the liquid level sensor 6 can be uploaded to the remote control platform for remote detection and regulation.

[0050] like Figure 2 As shown, taking the return pipe 2 as the secondary pipe network as an example, the working principle of the automatic alkali adding device provided in this embodiment is as follows:

[0051] First, pour the prepared alkaline solution into the dosing tank 1. In this embodiment, the pH value of the alkaline solution is 12. After calculation, 0.4g of alkali needs to be added per liter of solution.

[0052] Next, a target pH range is set in the setting unit of the controller 4 , that is, a target pH range of the liquid in the return pipe 2 . In this embodiment, the target pH is greater than 8 and less than 9.

[0053] Next, the first pH monitor 3 monitors the pH value of the solution in the return pipe 2. If the pH value of the solution in the return pipe 2 is detected to be lower than the target pH value range, that is, the pH value is less than or equal to 8 (each cubic meter of secondary network circulating water contains approximately 0.04g of alkali) in this embodiment, the controller 4 controls the dosing pump 8 to start and transport alkaline solution into the return pipe 2.

[0054] Next, the first pH monitor 3 monitors the pH value of the solution in the return pipe 2. If the pH value of the solution in the return pipe 2 reaches the upper limit of the target pH value range, that is, in this embodiment, the pH value reaches 9 (each cubic meter of secondary network circulating water contains approximately 0.4g of alkali), the controller 4 controls the dosing pump 8 to close; otherwise, the alkaline solution continues to be transported into the return pipe 2 until the first pH monitor 3 detects that the pH value of the solution in the return pipe 2 reaches the upper limit of the target pH value range.

[0055] Then, after the dosing pump 8 is turned off, the first pH monitor 3 continues to monitor the pH value of the solution in the return pipe 2. If the pH value of the solution in the return pipe 2 is monitored to be within the target pH value range, that is, greater than 8 and less than 9 in this embodiment, the controller 4 controls the dosing pump 8 to be turned off, and the automatic alkali addition process ends; on the contrary, if the pH value of the solution in the return pipe 2 is monitored to be lower than the target pH value range, that is, the pH value is less than or equal to 8 in this embodiment, the alkaline solution continues to be transported into the return pipe 2.

[0056] By utilizing the automatic alkali-adding device provided in this embodiment, the pH value of the circulating water in the secondary network of the heat exchange station can be effectively controlled within a reasonable range, which can not only prevent oxygen corrosion and scaling of the heating pipe network and extend the service life of the pipe network, but also prevent the alkalinity of the circulating water from exceeding the standard, which may cause damage to the metal film in the heat exchanger of the heat exchanger and the user's heat exchanger through decomposition, evaporation and concentration, and leakage of the heat exchanger. It effectively prevents the occurrence of many safety hazards in the heating operation link, and greatly improves the overall safety and stability of the heating system. In addition, the device can automatically obtain operating data, such as flow rate, pH value, etc., and can monitor the operation status of the alkali-adding equipment in real time to ensure its safe operation. At the same time, it has a remote mode to help the station operators and company technicians to control the system status in real time, understand the water tank liquid level, circulating water pH value and other information, and can promptly discover operating problems and make adjustments to effectively eliminate safety hazards.

[0057] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. An automatic alkali adding device, characterized in that: include: Dosing tank, used to hold alkaline solution; A return water pipe is connected to the dosing tank through a dosing pipe; a first pH monitor, provided on the return water pipe, for monitoring the pH value of the solution in the return water pipe; The controller is used to control the opening or closing of the dosing pipeline and the flow rate of the alkaline solution flowing to the return water pipeline.

2. The automatic alkali adding device according to claim 1, characterized in that The dosing tank is provided with a second pH monitor for monitoring the pH value of the solution in the dosing tank.

3. The automatic alkali adding device according to claim 1, characterized in that The dosing tank is provided with a liquid level sensor for monitoring the liquid level of the alkaline solution in the dosing tank.

4. The automatic alkali adding device according to claim 3, characterized in that The liquid level sensor is provided with a reminder liquid level, and the reminder liquid level is 0.5m.

5. The automatic alkali adding device according to claim 3, characterized in that: The liquid level sensor is provided with an alarm liquid level, and the alarm liquid level is 0.2m.

6. The automatic alkali adding device according to claim 1, characterized in that: The dosing pipeline is provided with a dosing pump, and the dosing pump is communicatively connected with the controller.

7. The automatic alkali adding device according to claim 1, characterized in that: A flow sensor is provided on the drug-adding pipeline, and the flow sensor is communicatively connected with the controller.

8. The automatic alkali adding device according to claim 1, characterized in that: The controller has a setting unit for setting a range of target pH values in the controller.

9. The automatic alkali adding device according to claim 8, characterized in that: The return water pipe is a primary pipe network, and the target pH value is greater than 10 and less than 12.

10. The automatic alkali adding device according to claim 8, characterized in that: The return water pipe is a secondary pipe network, and the target pH value is greater than 8 and less than 9.

Images