Ph measurement system

Abstract

A pH measurement system, comprising: a liquid intake pipe for a liquid to be measured, a flushing pipe, a pH measurement water tank (2) and a protective-liquid water tank (11), wherein the protective-liquid water tank (11) is configured to store a protective liquid; an output end of the liquid intake pipe for the liquid to be measured and an output end of the flushing pipe are connected to the pH measurement water tank (2); a flow measurement device is provided on the liquid intake pipe for the liquid to be measured; an output end of the protective-liquid water tank (11) is connected to the pH measurement water tank (2) by means of an output pipe of the protective-liquid water tank; a pH measurement device is provided inside the pH measurement water tank (2), a liquid level measurement device is provided on a side wall of the pH measurement water tank (2), and a liquid discharge pipe is provided at the bottom of the pH measurement water tank (2); and a first electric valve (13) is mounted on the output pipe of the protective-liquid water tank, and a second electric valve (10) is mounted on the liquid discharge pipe. The pH measurement system enables the protective-liquid water tank (11) to inject the protective liquid into the pH measurement water tank (2) in a deactivated state on the basis of feedback from the liquid level measurement device and the flow measurement device, thereby achieving offline protection of the pH measurement device.

Description

A pH detection system TECHNICAL FIELD

[0001] The utility model relates to pH detection technical field especially is related to a pH detection system. BACKGROUND

[0002] The wet deacidification system is a treatment technology for removing acid gases in industrial waste gas, mainly removing SO2, HCl and HF in flue gas. The pH detection system is an important part of controlling the stable and efficient operation of the wet deacidification system. Although the existing pH detection system can meet the daily operation requirements, when the wet system is out of operation, the pH meter will continue to soak in the detection solution for invalid detection, and cannot be self-maintained, which will seriously affect its service life and accuracy. Once the pH meter is distorted, it will directly affect the normal operation of the wet deacidification system. When the pH meter appears positive distortion (the detected value is higher than the actual value), the alkali supplement moment will lag, the acidity in the wet tower increases, the corrosion of the inner wall of the wet tower intensifies, and the deacidification efficiency decreases; when the pH meter appears complex distortion (the detected value is lower than the actual value), the alkali supplement moment is advanced, the alkalinity in the wet tower increases, at this time, although the deacidification effect of the wet system can be increased, the consumption of liquid alkali and the production of wastewater will also increase, and when the temperature is high, the solution is easy to scale in the pipeline, thereby increasing the operation and maintenance cost. Therefore, improving the accuracy and service life of the pH meter is of great significance to the efficient operation of the wet deacidification system.

[0003] UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the problems of improving the accuracy and service life of the pH detection device, and provides a pH detection system.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A pH detection system, comprising:

[0007] A liquid inlet pipeline, a flushing pipeline, a pH detection water tank, and a protective liquid water tank;

[0008] The input end of the liquid inlet pipeline is used for input of the liquid to be detected, the input end of the flushing pipeline is used for input of the flushing liquid, the protective liquid water tank is used for storing the protective liquid, the output end of the liquid inlet pipeline and the output end of the flushing pipeline are connected with the pH detection water tank, a flow detection device is arranged on the liquid inlet pipeline, and the output end of the protective liquid water tank is connected with the pH detection water tank through the protective liquid water tank output pipeline;

[0009] The pH detection water tank is internally provided with a pH detection device, a liquid level detection device is arranged on the side wall of the pH detection water tank, and a liquid discharge pipeline is arranged at the bottom of the pH detection water tank.

[0010] A first electric door is arranged on the protective liquid water tank output pipeline, and a second electric door is arranged on the liquid discharge pipeline.

[0011] In some embodiments, a first opening and closing valve, a second opening and closing valve, a flow detection device and a check valve are sequentially arranged from the input end of the to-be-tested liquid inlet pipeline to the output end of the to-be-tested liquid inlet pipeline.

[0012] In some embodiments, a third opening and closing valve is arranged on the flushing pipeline, and the output end of the flushing pipeline is arranged between the first opening and closing valve and the second opening and closing valve.

[0013] In some embodiments, the protective liquid water tank is connected with the flushing pipeline through a protective liquid water tank flushing pipeline, the input end of the protective liquid water tank flushing pipeline is arranged between the input end of the flushing pipeline and the third opening and closing valve, a sewage discharge pipeline is arranged at the bottom of the protective liquid water tank, a fourth opening and closing valve is arranged on the protective liquid water tank flushing pipeline, and a fifth opening and closing valve is arranged on the sewage discharge pipeline.

[0014] In some embodiments, the bottom of the protective liquid water tank is higher than the top of the pH detection water tank, so that the protective liquid in the protective liquid water tank can be supplemented to the pH detection water tank only through gravity.

[0015] In some embodiments, the liquid discharge pipeline comprises a first liquid discharge sub-pipeline and a second liquid discharge sub-pipeline arranged side by side, a sixth opening and closing valve is arranged on the first liquid discharge sub-pipeline, and a second electric door is arranged on the second liquid discharge sub-pipeline.

[0016] In some embodiments, an overflow water tank is further included, the pH detection water tank and the overflow water tank are arranged side by side, the overflow water tank is used for overflowing into after the pH detection water tank is full, and a third liquid discharge sub-pipeline is connected to the output end of the overflow water tank.

[0017] In some embodiments, the output end of the third liquid discharge sub-pipeline, the output end of the first liquid discharge sub-pipeline and the output end of the second liquid discharge sub-pipeline are connected through a liquid discharge main pipeline, and a seventh opening and closing valve is arranged on the liquid discharge main pipeline.

[0018] In some embodiments, a control device is further included, and the control device is connected with the first electric door, the second electric door, the liquid level detection device and the flow detection device respectively.

[0019] The utility model has the advantages of the following beneficial effects:

[0020] The utility model discloses a protection liquid water tank is set up, sets up flow detection device on the liquid inlet pipeline of the liquid to be measured, sets up liquid level detection device on the side wall of pH detection water tank, installs the first electric door on the protection liquid water tank output pipeline, installs the second electric door on the liquid outlet pipeline, can make the protection liquid water tank according to the feedback of liquid level detection device and flow detection device, injects the protection liquid into the pH detection water tank in the inactivated state, realizes the offline protection of pH detection device. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a pH detection system structure schematic diagram in the prior art;

[0022] Fig. 2 is a pH detection system structure schematic diagram in the utility model embodiment;

[0023] Fig. 3 is a pH detection water tank structure schematic diagram in the utility model embodiment;

[0024] Mark explanation:

[0025] 1-pH meter, 2-pH detection water tank, 3-first on-off valve, 4-sixth on-off valve, 5-seventh on-off valve, 6-third on-off valve, 7-liquid level meter, 8-second on-off valve, 9-check valve, 10-second electric door, 11-protection liquid water tank, 12-eighth on-off valve, 13-first electric door, 14-fourth on-off valve, 15-fifth on-off valve, 16-liquid inlet flowmeter, 17-overflow water tank. DETAILED DESCRIPTION

[0026] The following detailed description of the embodiments of the utility model. It should be emphasized that the following description is merely exemplary, and is not intended to limit the scope of the utility model and its applications.

[0027] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be for fixing or for coupling or communicating.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0029] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the utility model, the meaning of "multiple" is two or more than two, unless otherwise explicitly specified.

[0030] Referring to FIG. 1, the operation mode of the prior art pH detection device is as follows:

[0031] pH detection device operation: the liquid to be detected enters the pH detection water tank for detection through the first on-off valve 3, and after the water is full, it overflows into the overflow water tank, and then enters other pipelines through the seventh on-off valve 5.

[0032] Pipeline and pH detection device flushing: close the first on-off valve 3, open the pH detection chamber liquid outlet manual door (sixth on-off valve 4), open the third on-off valve 6 to clean the pipeline and the pH detection chamber, close the third on-off valve 6 after flushing, and close the sixth on-off valve 4 after draining, and flushing is completed.

[0033] The technical core of the embodiment of the utility model is to add a pH meter protection liquid automatic supplementing system on the basis of the original pH detection system, inject a certain amount of pH meter protection liquid (3M potassium chloride) into the pH buffer tank in the idle state, realize the offline protection of the pH meter, slow down the aging of the pH meter, and prolong the service life of the pH meter.

[0034] Referring to FIGS. 2-3, specifically, the pH detection system of the embodiment of the utility model comprises:

[0035] The liquid to be detected enters the liquid inlet pipeline, the flushing pipeline, the pH detection water tank 2, and the protection liquid water tank 11.

[0036] The input end of the liquid inlet pipeline is used for the input of the liquid to be detected, the input end of the flushing pipeline is used for the input of the flushing liquid, the protection liquid water tank 11 is used for storing the protection liquid, the output end of the liquid inlet pipeline and the output end of the flushing pipeline are connected with the pH detection water tank 2, a flow detection device is arranged on the liquid inlet pipeline, and the output end of the protection liquid water tank 11 is connected with the pH detection water tank 2 through a protection liquid water tank output pipeline. In the embodiment, the flow detection device is specifically a liquid inlet flow meter 16.

[0037] The pH detection water tank 2 is internally provided with a pH detection device, the side wall of the pH detection water tank 2 is provided with a liquid level detection device, and the bottom of the pH detection water tank 2 is provided with a liquid discharge pipeline. In the embodiment, the pH detection device is a pH meter 1, and the liquid level detection device is specifically a liquid level meter 7.

[0038] The first electric door 13 is installed on the protective liquid tank output pipeline, and the second electric door 10 is installed on the liquid discharge pipeline.

[0039] In the embodiment, the first opening and closing valve 3, the second opening and closing valve 8, the liquid inlet flow meter 16 and the check valve 9 are sequentially arranged from the input end of the liquid inlet pipeline to the output end of the liquid inlet pipeline.

[0040] In the embodiment, the protective liquid tank 11 is connected with the flushing pipeline through a protective liquid tank flushing pipeline, the input end of the protective liquid tank flushing pipeline is arranged between the input end of the flushing pipeline and the third opening and closing valve 6, the bottom of the protective liquid tank is provided with a sewage discharge pipeline, the fourth opening and closing valve 14 is arranged on the protective liquid tank flushing pipeline, and the fifth opening and closing valve 15 is arranged on the sewage discharge pipeline.

[0041] In the embodiment, the bottom of the protective liquid tank 11 is higher than the top of the pH detection tank 2, so that the protective liquid in the protective liquid tank can be supplemented into the pH detection tank only through gravity.

[0042] In the embodiment, the liquid discharge pipeline comprises the first liquid discharge sub-pipeline and the second liquid discharge sub-pipeline arranged in parallel, the sixth opening and closing valve 4 is arranged on the first liquid discharge sub-pipeline, and the second electric door 10 is arranged on the second liquid discharge sub-pipeline; the pH detection system of the embodiment further comprises an overflow tank 17, the pH detection tank 2 and the overflow tank 17 are arranged in parallel, the overflow tank 17 is used for overflowing into after the pH detection tank is full, and the output end of the overflow tank 17 is connected with a third liquid discharge sub-pipeline. The output end of the third liquid discharge sub-pipeline is connected with the output end of the first liquid discharge sub-pipeline and the output end of the second liquid discharge sub-pipeline through a liquid discharge main pipeline, and the seventh opening and closing valve 5 is arranged on the liquid discharge main pipeline. In the embodiment, the first to seventh opening and closing valves are manual doors, and the eighth opening and closing valve 12 is further arranged in front of the first electric door 13. The embodiment further comprises a control device, and the control device is connected with the first electric door, the second electric door, the liquid level detection device and the flow detection device.

[0043] The pH detection system in the embodiment has the following operation modes: the interlocking mechanism of the pH detection system comprises two parts: one is that when the liquid inlet flow meter flow is 0, the control device controls the interlocking to open the liquid discharge electric door to discharge water from the pH detection tank; and the other is that the liquid level meter interlocking, the low water level control device controls the automatic interlocking to open the protective liquid inlet electric door, and the control device controls the automatic interlocking to close the protective liquid inlet electric door when the water level is high (the specific values of the high and low water levels are set according to actual needs). The first opening and closing valve 3, the seventh opening and closing valve 5, the second opening and closing valve 8 and the eighth opening and closing valve 12 are commonly opened manual doors, and the sixth opening and closing valve 4, the third opening and closing valve 6, the fourth opening and closing valve 15 and the fifth opening and closing valve 15 are commonly closed manual doors.

[0044] The liquid to be tested is input from the liquid inlet pipeline, enters the pH detection water tank 2 through the first on-off valve 3, the second on-off valve 8, the liquid inlet flow meter 16 and the non-return valve 9, overflows into the overflow water tank 17 when full, and enters other pipelines through the seventh on-off valve 5.

[0045] The protective liquid is put into operation: after the liquid to be tested stops flowing, the liquid inlet flow meter 16 displays 0, the remote control device is interlocked to open the liquid outlet electric door (the second electric door 10) to empty the solution in the pH detection water tank 2, and when the value of the liquid level meter 7 is 0, the liquid outlet electric door (the second electric door 10) is interlocked to close, and after a delay of 5 seconds, the protective liquid inlet electric door (the first electric door 13) is interlocked to open to supplement the protective liquid to the pH detection water tank 2, and when the solution is slightly higher than the liquid level of the pH meter 1 probe, the protective liquid inlet electric door (the first electric door 13) is interlocked to close, at which time the pH meter 1 is maintained in the protective liquid (the non-return valve 9 prevents the protective liquid from flowing out of the liquid inlet pipeline).

[0046] The pH detection device is operated again: after the interlocks are released, the remote control device controls the opening of the pH detection chamber liquid outlet electric door (the second electric door 10) to discharge the protective liquid, and when the water level indicated by the liquid level meter 7 is 0, the pH detection chamber liquid outlet electric door (the second electric door 10) is closed, and then the liquid pump is started, the liquid to be tested enters the pH detection water tank through the manual door (the first on-off valve 3 and the second on-off valve 8), the liquid inlet flow meter 16 and the non-return valve 9 for detection, overflows into the overflow water tank when full, and enters other pipelines through the seventh on-off valve 5, and after normal operation, the interlocks are restored.

[0047] The pipeline and the pH detection device are flushed: the remote control device releases the interlocks, the liquid inlet pipeline manual door (the second on-off valve 8) is closed on site, the flushing pipeline manual door (the third on-off valve 6) is opened to flush the pipeline at the liquid inlet pipeline manual door (the first on-off valve 3), after flushing is completed, the flushing pipeline manual door (the third on-off valve 6) is closed to flush the other side of the pipeline, at which time the liquid inlet pipeline manual door (the first on-off valve 3) is closed, the pH detection chamber liquid outlet manual door (the sixth on-off valve 4) is opened, and the flushing pipeline manual door (the third on-off valve 6) is opened to flush the second on-off valve 8, the non-return valve 9, the pipeline and the pH detection water tank 2, after flushing is completed, the flushing pipeline manual door (the third on-off valve 6) is closed, the pH detection chamber liquid outlet manual door (the sixth on-off valve 4) is closed after draining, the liquid inlet manual door (the first on-off valve 3) is opened, and after flushing is completed, the interlocks are restored.

[0048] The protection liquid water tank 11 is flushed: the protection liquid high water tank blowdown door (fifth switch valve 15) is opened, and the residual protection liquid in the tank is collected. After the collection is completed, the protection liquid water tank 11 blowdown door (fifth switch valve 15) is closed, the flushing manual door (fourth open-close valve 14) is opened, and the protection liquid water tank 11 is filled with water. After the water is filled, the flushing manual door (fourth open-close valve 14) is closed, the protection liquid water tank 11 is cleaned, and the flushing manual door (fourth open-close valve 14) is opened. The protection liquid water tank 11 blowdown door (fifth switch valve 15) is opened for blowdown. After the blowdown is completed, the protection liquid high water tank blowdown door (fifth switch valve 15) is closed, the cleaning is completed, and the eighth switch valve 12 remains closed until the flushing is completed.

[0049] The utility model adds electric door, flowmeter, liquid level meter, high water tank and other components on the basis of original pH detection system, and realizes the off-line protection of pH meter through the real-time feedback of flowmeter and liquid level meter, interlocking adjustment to each pipeline electric door, injection of a certain amount of pH meter protection liquid into the pH buffer tank in the inactivated state, the utility model has the advantages that:

[0050] 1. Simple operation, remote control of pH meter protection liquid use and withdrawal;

[0051] 2. The use process of pH meter protection liquid is realized automatically by using the interlocking mechanism;

[0052] 3. The pH detection system is equipped with complete backwashing pipeline, and complete flushing of each pipeline and the pH detection water tank can be realized.

[0053] The above is further detailed description of the utility model in combination with specific / preferred embodiments, and cannot be deemed as limitation of the specific implementation of the utility model to these descriptions. For ordinary skilled in the art to which the utility model belongs, without departing from the concept of the utility model, some substitutions or variations can be made to the described embodiments, and these substitutions or variations shall be deemed as falling within the protection scope of the utility model. In the description of the specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the case of not mutually contradictory, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples. Although the embodiments of the utility model and its advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the protection scope of the patent application.

Claims

1. A pH detection system characterized by, The utility model relates to a pH detection device for liquid, which comprises: a liquid inlet pipeline for the liquid to be detected, a flushing pipeline, a pH detection water tank, and a protective liquid water tank; an input end of the liquid inlet pipeline is used for input of the liquid to be detected, an input end of the flushing pipeline is used for input of flushing liquid, the protective liquid water tank is used for storage of protective liquid, an output end of the liquid inlet pipeline and an output end of the flushing pipeline are connected with the pH detection water tank, a flow detection device is arranged on the liquid inlet pipeline, and an output end of the protective liquid water tank is connected with the pH detection water tank through a protective liquid water tank output pipeline; a pH detection device is arranged inside the pH detection water tank, a liquid level detection device is arranged on a side wall of the pH detection water tank, and a liquid discharge pipeline is arranged at a bottom of the pH detection water tank; a first electric door is installed on the protective liquid water tank output pipeline, and a second electric door is installed on the liquid discharge pipeline.

2. The pH detection system of claim 1, wherein, A first on-off valve, a second on-off valve, the flow detection device, and a check valve are sequentially arranged from an input end of the liquid inlet pipeline to an output end of the liquid inlet pipeline.

3. The pH detection system of claim 2, wherein, A third on-off valve is arranged on the flushing pipeline, and an output end of the flushing pipeline is arranged between the first on-off valve and the second on-off valve.

4. The pH detection system of claim 3, wherein, The protective liquid water tank is connected with the flushing pipeline through a protective liquid water tank flushing pipeline, an input end of the protective liquid water tank flushing pipeline is arranged between an input end of the flushing pipeline and the third on-off valve, a blowdown pipeline is arranged at a bottom of the protective liquid water tank, a fourth on-off valve is arranged on the protective liquid water tank flushing pipeline, and a fifth on-off valve is arranged on the blowdown pipeline.

5. The pH detection system of claim 1, wherein, The bottom of the protective liquid water tank is higher than the top of the pH detection water tank, so that the protective liquid in the protective liquid water tank can be supplemented to the pH detection water tank only through gravity.

6. The pH detection system of claim 1, wherein, The liquid discharge pipeline comprises a first liquid discharge sub-pipeline and a second liquid discharge sub-pipeline arranged side by side, a sixth on-off valve is arranged on the first liquid discharge sub-pipeline, and a second electric door is arranged on the second liquid discharge sub-pipeline.

7. The pH detection system of claim 6, wherein, The utility model further comprises an overflow water tank, the pH detection water tank and the overflow water tank are arranged side by side, the overflow water tank is used for overflow of the pH detection water tank after being full, and a third liquid discharge sub-pipeline is connected with an output end of the overflow water tank.

8. The pH detection system of claim 7, wherein, An output end of the third liquid discharge sub-pipeline, an output end of the first liquid discharge sub-pipeline, and an output end of the second liquid discharge sub-pipeline are connected through a liquid discharge main pipeline, and a seventh on-off valve is arranged on the liquid discharge main pipeline.

9. The pH detection system of claim 1, wherein, The utility model further comprises a control device, and the control device is connected with the first electric door, the second electric door, the liquid level detection device, and the flow detection device.

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