Automatic pH adjusting device for acidic ammonium salt solution
By introducing a circulating pump and pH sensor combined with a PLC controller into the acidic ammonium salt solution system, automated and precise pH adjustment of the acidic ammonium salt solution is achieved, solving the problems of uneven mixing and ammonia leakage in the existing technology, and improving equipment utilization and operational safety.
Patent Information
- Application Number
- CN202423238034.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-26
AI Technical Summary
In existing technologies, pH adjustment of acidic ammonium salt solutions suffers from problems such as unstable manual operation, ammonia gas leakage which harms the environment, high equipment investment, uneven mixing, and difficulty in achieving precise control.
The system employs a sealed tank internal circulation pump and pH sensor combined with a PLC controller. The circulation pump enables automated mixing and pH detection of the solution, while a distributor evenly injects ammonia water to adjust the pH. The ammonia gas is then absorbed by the absorption tank, achieving automated and precise pH adjustment.
It achieves stable and uniform mixing of acidic ammonium salt solutions and precise pH control, reducing the risk of ammonia leakage, reducing equipment investment, and improving operational safety and equipment utilization.
Smart Images
Figure CN223688172U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of wastewater treatment, and particularly relates to an automatic pH adjusting device for acidic ammonium salt solution. BACKGROUND
[0002] Ammonia nitrogen is a common atmospheric and water pollutant, which can cause great harm to the ecological environment and human health. The amount of ammonia nitrogen wastewater in China is large and wide, and the state and local governments have strict regulations and restrictions on the content of ammonia nitrogen in discharged wastewater. Therefore, the standard treatment of ammonia nitrogen wastewater is a practical problem faced by multiple industries. The stripping method is widely used in industrial practice due to its mature process, stable operation, high stripping efficiency and other advantages. The process of stripping is to convert the ionic ammonia ion in wastewater into free ammonia, and then to transfer ammonia nitrogen from liquid phase to gas phase by air. The free ammonia blown out of the wastewater must be absorbed by acid liquid to prevent secondary pollution of the atmosphere. The lower the pH of the acidic absorption liquid, the higher the absorption efficiency of ammonia. In order to ensure the absorption efficiency of free ammonia in gas phase, the pH of the acidic absorption liquid is usually low, and the final absorption completed liquid is a mixture of acid and ammonium salt with a pH of 1-3, which is discharged from the absorption liquid tank periodically. The acidic ammonium salt solution cannot be directly reused and needs to be adjusted to neutral first and then further concentrated in the evaporation system to obtain ammonium salt solids for reuse or sale. The gaseous membrane method, as a new type of energy-saving and efficient wastewater ammonia removal technology, also has the same problem. The absorption completed liquid produced as a byproduct is an acidic ammonium salt solution, which needs to be adjusted to neutral before further treatment.
[0003] In order to obtain pure ammonium salt solution, ammonia water is usually selected as the neutralizing agent for acidic ammonium salt solution. Due to the intermittent discharge of acidic ammonium salt solution and the far smaller amount of wastewater to be treated than ammonia-containing wastewater, manual addition of ammonia water and stirring to mix are commonly used in actual operation of the plant. This method has no equipment investment and low cost, but it not only produces ammonia gas escape during the addition process, which can harm personnel and the environment, but also makes it difficult to control the amount of ammonia water added, thereby making it impossible to control the pH. Using a delivery pump to add ammonia water and stirring to mix not only increases equipment investment, but also makes it difficult to seal the tank with a stirring device tightly, which can easily cause ammonia gas to escape and cause air pollution. Using a pipe mixer to mix ammonia water into acidic ammonium salt solution to adjust its pH to neutral is simple to operate and saves labor, but there are dead angles in the pipe, the two liquid phases cannot be fully mixed, and there is a delay in pH detection, which cannot accurately reflect the pH of the mixed solution in a timely manner.
[0004] In summary, it is necessary to develop an acidic ammonium salt solution pH adjusting device that can stably adjust the pH, has no secondary pollution, is simple to operate and economical. UTILITY MODEL CONTENTS
[0005] In order to solve the above technical problems, the utility model provides the following technical scheme:
[0006] The utility model relates to an automatic pH device of acid ammonium salt solution, including ammonia water jar, the right side of ammonia water jar is provided with sealed jar, and the rear side of sealed jar is provided with absorption jar, the left side of ammonia water jar is provided with PLC controller, one side of ammonia water jar is provided with transmission pump, the liquid inlet end of transmission pump communicates with ammonia water jar, and the liquid outlet end of transmission pump is connected with transmission pipe, the other end of transmission pipe extends to the inner chamber of sealed jar and is connected with distributor, one side of sealed jar is provided with circulating pump, the liquid inlet end of circulating pump communicates with sealed jar, and the liquid outlet end of circulating pump is connected with back pipe, the upper end of back pipe is provided with pH sensor, the upper end of absorption jar is connected with pipe, and the other end of pipe communicates with sealed jar.
[0007] Further, in the utility model, the upper end of back pipe is connected with first solenoid valve, one side of back pipe is connected with connecting pipe, the one end of connecting pipe away from back pipe is connected with external evaporation system, and connecting pipe is connected with second solenoid valve.
[0008] Further, in the utility model, the input of circulating pump and transmission pump is connected with the output of PLC controller, the output of pH sensor is connected with the input of PLC controller, and the output of PLC controller is connected with the input of first solenoid valve and second solenoid valve respectively.
[0009] Further, in the utility model, the bottom of ammonia water jar is fixedly connected with bottom plate, and the bottom of PLC controller, sealed jar and absorption jar is fixedly connected with the top of bottom plate.
[0010] Further, in the utility model, the bottom of transmission pump is fixedly connected with first supporting plate, and the bottom of first supporting plate is fixedly connected with the top of bottom plate, one side of circulating pump is fixedly connected with second supporting plate, and the other end of second supporting plate is fixedly connected with the surface of sealed jar.
[0011] Further, in the utility model, the top of ammonia water jar is connected with water injection pipe, the top of sealed jar is connected with liquid injection pipe, and the top of liquid injection pipe and water injection pipe is movably connected with cover.
[0012] Technical principle:
[0013] The utility model discloses a circulation pump operation can cooperate with back pipe to carry out the circulating flow to the solution in the sealed jar, and the pH sensor is used to detect its pH value in the circulation process, and the PLC controller can compare and analyze the pH value data, when less than the set value, the PLC controller will make transmission pump operation and transmit the ammonia water in the ammonia water jar to the inner chamber of transmission pipe and distributor, makes the distributor and adjusts the solution pH to punch into the sealed jar inside the ammonia water evenly, until the solution reaches the pH set value, then stop punching into the ammonia water, thereby realizing the automatic regulation of solution pH, and the ammonia gas generated in the sealed jar in the adjustment process will enter the inside of the absorption jar through the pipe, and the ammonia gas is absorbed through the absorption jar.
[0014] Beneficial effects, the utility model has the following beneficial effects:
[0015] 1. Adopt the mixed solution in the sealed jar to circulate through the circulation pump large flow, replace the stirring device, not only simplify the structure in the sealed jar, reduce the ammonia gas escape risk in the jar, but also avoid the stirring dead angle, make the solution more fully mixed, mix more evenly, and the pH is more stable;
[0016] 2. The PLC controller is coupled with the pH sensor and is used, not only realizes the automatic regulation of solution pH, and the pH control is more accurate;
[0017] 3. The PLC controller is coupled with transmission pump, circulation pump, first solenoid valve and is used, replaces the manpower feeding, stirring, greatly saves the manpower operation, reduces the risk of harming personal health;
[0018] 4. The ammonia gas generated in the sealed jar is absorbed through the absorption jar, prevents the ammonia gas overflow from causing the harm to personnel and environment. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is the structure schematic diagram of the utility model;
[0020] Figure 2 It is the sealed jar local section view state structure schematic diagram of the utility model;
[0021] Figure 3 It is the circulation pump and back pipe connection structure schematic diagram of the utility model;
[0022] Figure 4 It is the system principle schematic diagram of the utility model.
[0023] In the drawing:
[0024] 1, ammonia tank; 2, sealed tank; 3, absorption tank; 4, PLC controller; 5, transmission pump; 6, transmission pipe; 7, circulating pump; 8, return pipe; 9, pH sensor; 10, first electromagnetic valve; 11, connecting pipe; 12, second electromagnetic valve; 13, distributor; 14, pipe; 15, bottom plate; 16, liquid injection pipe; 17, water injection pipe. DETAILED DESCRIPTION
[0025] In order to better understand the technical content of the utility model, specific embodiments are described below with the accompanying drawings. In the present disclosure, aspects of the utility model are described with reference to the accompanying drawings, which show many embodiments of the description. The embodiments of the present disclosure are not necessarily defined in all aspects of the utility model. It should be understood that the above-mentioned various concepts and embodiments, as well as those described in more detail below, can be implemented in any one of many ways, because the concepts and embodiments disclosed by the utility model are not limited to any implementation. In addition, some aspects of the utility model can be used alone, or in any appropriate combination with other aspects of the utility model.
[0026] Example 1
[0027] As Figures 1-4 shown, the first embodiment of the utility model provides an automatic pH adjusting device for acidic ammonium salt solution, which comprises an ammonia tank 1, a sealed tank 2 is arranged on the right side of the ammonia tank 1, and an absorption tank 3 is arranged on the back side of the sealed tank 2, a PLC controller 4 is arranged on the left side of the ammonia tank 1, a transmission pump 5 is arranged on one side of the ammonia tank 1, the liquid inlet end of the transmission pump 5 is communicated with the ammonia tank 1, and the liquid outlet end of the transmission pump 5 is communicated with a transmission pipe 6, the other end of the transmission pipe 6 extends to the inner cavity of the sealed tank 2 and is communicated with a distributor 13, a circulating pump 7 is arranged on one side of the sealed tank 2, the liquid inlet end of the circulating pump 7 is communicated with the sealed tank 2, and the liquid outlet end of the circulating pump 7 is communicated with a return pipe 8, the upper end of the return pipe 8 is provided with a pH sensor 9, the upper end of the absorption tank 3 is communicated with a pipe 14, and the other end of the pipe 14 is communicated with the sealed tank 2.
[0028] As Figures 1-4As shown, the circulation pump 7 is started by the PLC controller 4, and the circulation pump 7 works in cooperation with the return pipe 8 to suck and transport the solution in the sealed tank 2, so that the solution circulates, and the pH value of the solution is detected by the pH sensor 9 during the circulation, and the pH value data of the solution detected by the pH sensor 9 are transmitted to the PLC controller 4, and the pH value data are compared and analyzed by the PLC controller 4, when the pH value is less than the set value, the PLC controller 4 starts the transmission pump 5, and the ammonia water in the ammonia water tank 1 is transported to the inner cavity of the transmission pipe 6 and the distributor 13 by the transmission pump 5, so that the distributor 13 uniformly sprays the ammonia water into the sealed tank 2 to adjust the pH of the solution, and the solution continuously circulates during the adjustment, and the pH sensor 9 continuously detects the pH value of the solution, until the solution reaches the pH set value, the PLC controller 4 stops the operation of the transmission pump 5, and stops spraying the ammonia water into the sealed tank 2, so that the ammonia water is controlled to be injected, and the automatic adjustment of the pH of the solution is realized, and the ammonia gas generated in the sealed tank 2 is introduced into the inside of the absorption tank 3 through the pipe 14 for further treatment, and the ammonia gas is absorbed by the absorption tank 3, so that the ammonia gas is prevented from overflowing to cause harm to personnel and environment, and the absorption tank 3 is an acid absorption liquid for treating ammonia-nitrogen wastewater by stripping method or gaseous membrane method, and the absorption tank 3 is used for absorbing the ammonia gas discharged from the sealed tank 2, so that one tank is used for two purposes, and the equipment investment is reduced and the equipment utilization is improved in the engineering practical application.
[0029] Embodiment 2
[0030] With reference to Figure 1 , 3 and 4, this is the second embodiment of the utility model, and the embodiment is based on the previous embodiment.
[0031] In the embodiment, the upper end of the return pipe 8 is communicated with the first electromagnetic valve 10, one side of the return pipe 8 is communicated with the connecting pipe 11, the end of the connecting pipe 11 away from the return pipe 8 is connected with an external evaporation system, and the connecting pipe 11 is communicated with the second electromagnetic valve 12.
[0032] The input ends of the circulation pump 7 and the transmission pump 5 are connected with the output end of the PLC controller 4, the output end of the pH sensor 9 is connected with the input end of the PLC controller 4, the output end of the PLC controller 4 is connected with the input ends of the first electromagnetic valve 10 and the second electromagnetic valve 12 respectively, the model of the pH sensor 9 is Endress+Hauser CPS71D, and the model of the PLC controller 4 is S7-1200 series.
[0033] The bottom of the ammonia water tank 1 is fixedly connected with a bottom plate 15, and the bottoms of the PLC controller 4, the sealed tank 2 and the absorption tank 3 are fixedly connected with the top of the bottom plate 15.
[0034] As Figure 1 , 3As shown in Figure 4, the first solenoid valve 10 can be used to block or open the return pipe 8 to control the flow of liquid inside the return pipe 8. The second solenoid valve 12 can be used to block or open the connecting pipe 11 to control the flow of liquid inside the connecting pipe 11. After the solution is regulated, the first solenoid valve 10 can block the return pipe 8, and the second solenoid valve 12 can open the connecting pipe 11. As a result, the regulated solution will not enter the sealed tank 2 again through the return pipe 8. Instead, the solution will enter the inner cavity of the connecting pipe 11 and be transferred to the external evaporation system for further processing. The base plate 15 is located at the bottom of the ammonia tank 1, the sealed tank 2, the absorption tank 3, and the PLC controller 4, thus providing stable support for the ammonia tank 1, the sealed tank 2, the absorption tank 3, and the PLC controller 4, ensuring their operational stability.
[0035] Example 3
[0036] Reference Figure 1 This is the third embodiment of the present invention, which is based on the first two embodiments.
[0037] In this embodiment, a first support plate is fixedly connected to the bottom of the transfer pump 5, and the bottom of the first support plate is fixedly connected to the top of the base plate 15. A second support plate is fixedly connected to one side of the circulation pump 7, and the other end of the second support plate is fixedly connected to the surface of the sealed tank 2.
[0038] The top of the ammonia tank 1 is connected to a water injection pipe 17, and the top of the sealed tank 2 is connected to a liquid injection pipe 16. Both the top of the liquid injection pipe 16 and the water injection pipe 17 are movably connected to a cap.
[0039] like Figure 1 As shown, the first support plate can stably support the transfer pump 5, and the second support plate can stably support the circulation pump 7, thereby ensuring the stability of the transfer pump 5 and the circulation pump 7 during operation. The injection pipe 16 facilitates the injection of acidic ammonium salt solution into the inner cavity of the sealed tank 2 for treatment, and the water injection pipe 17 facilitates the injection of ammonia water into the ammonia water tank 1 for storage, which is convenient for later use. The sealing pipe 16 and the water injection pipe 17 can be sealed by the cap to prevent external impurities from entering the inner cavity of the ammonia water tank 1 and the sealed tank 2 through the injection pipe 16 and the water injection pipe 17.
[0040] In use, first, the acidic ammonium salt solution is injected into the inner cavity of the sealed tank 2 through the injection pipe 16, and the ammonia water is injected into the inner storage of the ammonia water tank 1 through the water injection pipe 17, then the circulation pump 7 and the first electromagnetic valve 10 are opened by the PLC controller 4, the return pipe 8 is in an unobstructed state, and the second electromagnetic valve 12 is closed, so that the connecting pipe 11 is in a blocked state, the solution in the sealed tank 2 is transmitted to the inner cavity of the return pipe 8 by the operation of the circulation pump 7, and the return pipe 8 transmits the solution to the inner cavity of the sealed tank 2 again, so that the solution can circulate, the pH value of the solution is detected by the pH sensor 9 during the circulation process, and the pH value data of the solution detected by the pH sensor 9 is transmitted to the PLC controller 4, the pH value data is compared and analyzed by the PLC controller 4, when the pH value is less than the set value, the transmission pump 5 is operated by the PLC controller 4, the ammonia water in the ammonia water tank 1 is transmitted to the inner cavity of the transmission pipe 6 and the distributor 13 by the transmission pump 5, the distributor 13 uniformly sprays the ammonia water into the sealed tank 2 to adjust the pH of the solution, and the solution continues to circulate during the adjustment process, and the pH sensor 9 continuously detects the pH value of the solution, until the solution reaches the pH set value, the operation of the transmission pump 5 is stopped by the PLC controller 4, and the ammonia water is stopped from being sprayed into the sealed tank 2, so that the ammonia water is controlled to be injected, and the automatic adjustment of the pH of the solution is realized, and the ammonia gas generated in the sealed tank 2 is prevented from overflowing to cause harm to personnel and the environment, when the ammonia water is stopped from being sprayed into the sealed tank 2, the second electromagnetic valve 12 is opened by the PLC controller 4, so that the connecting pipe 11 is in an unobstructed state, and then the adjusted solution in the sealed tank 2 is transmitted to the external evaporation system through the connecting pipe 11, so that the solidification operation in the later stage is facilitated.
[0041] The standard parts used in the application file can be purchased from the market, and can be customized according to the description and drawings, and the specific connection mode of each part adopts the conventional bolt, rivet, welding and other conventional means in the prior art, the mechanical, parts and equipment adopt the conventional type in the prior art, the control mode is automatically controlled by the controller, and the control circuit of the controller can be realized by simple programming of the person skilled in the art, which belongs to the common knowledge in the art, and the application is mainly used to protect the mechanical device, so the control mode and circuit connection are not explained in detail.
[0042] Although the utility model has disclosed as above with preferred embodiments, it is not used to limit the utility model. Those skilled in the art without departing from the spirit and scope of the utility model can make various changes and decorations. Therefore, the protection scope of the utility model is defined by the claims.
Claims
1. A device for automatic pH adjustment of an acidic ammonium salt solution comprising an ammonia tank (1), characterized in that: The right side of the ammonia water tank (1) is provided with a sealed tank (2), and the rear side of the sealed tank (2) is provided with an absorption tank (3), the left side of the ammonia water tank (1) is provided with a PLC controller (4), one side of the ammonia water tank (1) is provided with a transmission pump (5), the liquid inlet end of the transmission pump (5) is communicated with the ammonia water tank (1), and the liquid outlet end of the transmission pump (5) is communicated with a transmission pipe (6), one end of the transmission pipe (6) extends to the inner cavity of the sealed tank (2) and is communicated with a distributor (13), one side of the sealed tank (2) is provided with a circulating pump (7), the liquid inlet end of the circulating pump (7) is communicated with the sealed tank (2), and the liquid outlet end of the circulating pump (7) is communicated with a return pipe (8), the upper end of the return pipe (8) is provided with a pH sensor (9), the upper end of the absorption tank (3) is communicated with a through pipe (14), and the other end of the through pipe (14) is communicated with the sealed tank (2).
2. The apparatus for automatically adjusting the pH of an acidic ammonium salt solution according to claim 1, wherein: The upper end of the return pipe (8) is communicated with a first electromagnetic valve (10), one side of the return pipe (8) is communicated with a connecting pipe (11), one end of the connecting pipe (11) away from the return pipe (8) is connected with an external evaporation system, and the connecting pipe (11) is communicated with a second electromagnetic valve (12).
3. The apparatus for automatically adjusting the pH of an acidic ammonium salt solution of claim 1, wherein: The input ends of the circulating pump (7) and the transmission pump (5) are connected with the output end of the PLC controller (4), the output end of the pH sensor (9) is connected with the input end of the PLC controller (4), and the output end of the PLC controller (4) is connected with the input ends of the first electromagnetic valve (10) and the second electromagnetic valve (12).
4. The apparatus for automatically adjusting the pH of an acidic ammonium salt solution of claim 1, wherein: The bottom of the ammonia water tank (1) is fixedly connected with a bottom plate (15), and the bottoms of the PLC controller (4), the sealed tank (2) and the absorption tank (3) are fixedly connected with the top of the bottom plate (15).
5. The apparatus for automatically adjusting the pH of an acidic ammonium salt solution of claim 4, wherein: The bottom of the transmission pump (5) is fixedly connected with a first supporting plate, and the bottom of the first supporting plate is fixedly connected with the top of the bottom plate (15), one side of the circulating pump (7) is fixedly connected with a second supporting plate, and the other end of the second supporting plate is fixedly connected with the surface of the sealed tank (2).
6. The apparatus for automatically adjusting the pH of an acidic ammonium salt solution of claim 1, wherein: The top of the ammonia water tank (1) is communicated with a water filling pipe (17), the top of the sealed tank (2) is communicated with a liquid filling pipe (16), and the tops of the liquid filling pipe (16) and the water filling pipe (17) are movably connected with covers.