Pretreatment device of online sodium degree analyzer

Abstract

The utility model relates to the technical field of online sodium degree instruments, and particularly discloses an online sodium degree analyzer pretreatment device which comprises a box body, an online sodium degree instrument, a basifier bottle, a measuring cell and a Venturi tube, and the online sodium degree instrument, the basifier bottle, the measuring cell and the Venturi tube are arranged in the box body, and a detection electrode used for being inserted into the measuring cell is arranged on the online sodium degree instrument; one end of the venturi tube is used for being connected with a sample water feeding tube, the other end of the venturi tube is connected with the measuring cell through a water outlet tube, the inner diameter of the venturi tube is large at the two ends and small in the middle, and the alkalizer bottle is communicated with the position, with the smaller inner diameter, of the venturi tube through a feeding tube. The diisopropylamine adding device has the effect of solving the problems that frequent maintenance and repair are needed when an external pump is adopted for adding diisopropylamine, and the use cost is increased.

Description

Technical Field

[0001] This application relates to the field of online sodium analyzer technology, and in particular to a pretreatment device for an online sodium analyzer. Background Technology

[0002] Online sodium analyzers typically employ a potentiometric method, using a sodium-sensitive glass sodium electrode inserted into the sample water to directly detect sodium ion content. This method is simple and quick, and is widely used for sodium ion monitoring in boiler water of thermal power plants and for detecting sodium ions in water treatment cation exchange bed failures. When using an online sodium analyzer for trace sodium detection, the sample water pH must be greater than 10.5, and a continuous and stable alkalization effect must be ensured. A common practice is to add diisopropylamine to the sample water to maintain this alkalinity.

[0003] Currently, diisopropylamine is mostly added using external pumps. These pumps inject diisopropylamine into the flowing sample water at regular intervals and in measured quantities to achieve continuous alkalization of the sample water. However, due to the strong ecotoxicity of diisopropylamine, the external pumps require frequent maintenance and repair during use, increasing operating costs. Utility Model Content

[0004] To address the issue of frequent maintenance and repairs required when using an external pump to add diisopropylamine, which increases operating costs, this application provides an online sodium analyzer pretreatment device.

[0005] The online sodium analyzer pretreatment device provided in this application adopts the following technical solution:

[0006] A pretreatment device for an online sodium analyzer includes a housing and an online sodium analyzer, an alkalizing agent bottle, a measuring cell, and a venturi tube housed within the housing. The online sodium analyzer is equipped with a detection electrode for insertion into the measuring cell. One end of the venturi tube is connected to a sample water inlet pipe, and the other end of the venturi tube is connected to the measuring cell via an outlet pipe. The inner diameter of the venturi tube is larger at both ends and smaller in the middle. The alkalizing agent bottle is connected to the smaller inner diameter section of the venturi tube via an inlet pipe.

[0007] By adopting the above technical solution, during use, sample water is introduced into the Venturi tube through the sample water inlet pipe. When the sample water flows from the larger inner diameter section at the end of the Venturi tube to the smaller inner diameter section in the middle, the flow velocity of the sample water increases and the pressure decreases. Under the action of atmospheric pressure, the alkalizing agent in the inlet pipe connected at this point is drawn into the Venturi tube and then mixed with the sample water into the measuring cell. During the mixing and flow process, the sample water is alkalized. Finally, the sodium content of the sample water to be tested is measured by the detection electrode of the online sodium meter. This eliminates the need for an external pump to pump the alkalizing agent into the sample water, simplifying the alkalizing agent addition process, reducing maintenance workload, and significantly reducing the consumption of alkalizing agent, thus saving costs.

[0008] Optionally, the alkalizing agent bottle is fixedly installed in the box by a clamping and positioning system. The clamping and positioning system includes a base, a slider, an arc-shaped clamping block and a driving mechanism. Two sets of sliders are slidably arranged on the base, and each arc-shaped clamping block is arranged on one slider. The driving mechanism is used to drive the two sliders to move closer or further apart.

[0009] By adopting the above technical solution, the two arc-shaped clamping blocks can be driven to move closer together by the driving mechanism. During the process of moving closer together, the two arc-shaped clamping blocks clamp the two sides of the alkali agent bottle, thereby clamping and positioning the alkali agent bottle. This reduces the risk of the alkali agent bottle shaking and tipping over during the process of being drawn out, and improves the safety during use.

[0010] Optionally, the driving mechanism includes a connecting rod, a moving block, and an elastic element. The moving block is slidably connected to the base in a direction perpendicular to the moving trajectory of the two sliders. There are two connecting rods, each of which is rotatably connected to a slider, and the ends of the two connecting rods away from the sliders are rotatably connected to the moving block. One end of the elastic element is connected to the moving block, and the other end of the elastic element is connected to the base. The elastic element tends to move the moving block away from the line connecting the two sliders.

[0011] By adopting the above technical solution, during use, pressing the moving block towards the line connecting the two sliders will cause the ends of the two connecting rods away from the moving block to move away from each other, thus achieving the goal of moving the two sliders away from each other. After the moving block is no longer pressed, it will move away from the line connecting the two sliders under the elastic force of the elastic element, thereby causing the ends of the two connecting rods away from the moving block to move closer to each other, thus achieving the functional requirement of moving the two sliders closer to each other. The matching arrangement of the connecting rods, moving block, and elastic element realizes the functional requirement of driving the two sliders closer to or further apart, and the driving method is simple and convenient to use.

[0012] Optionally, the base is provided with a support block, the support block has a through hole, and the movable block is provided with a pressing rod along its own moving direction, the pressing rod passing through the through hole.

[0013] By adopting the above technical solution, the setting of the pressing rod makes the moving block more evenly stressed and easy to press. The coordinated setting of the support block, through hole and pressing rod makes the movement of the moving block more stable.

[0014] Optionally, a buffer pad is provided on the side of the arc-shaped clamping blocks that are close to each other.

[0015] By adopting the above technical solution, the setting of the buffer pad can reduce the risk of the alkali agent bottle being damaged by the arc-shaped clamping block during the clamping process, thus improving safety. In addition, the setting of the buffer pad can also compensate for the clamping gap between the arc-shaped clamping block and the alkali agent bottle, thereby making the clamping of the alkali agent bottle by the arc-shaped clamping block more stable.

[0016] Optionally, the Venturi tube has elastic plugs at both ends, and the elastic plugs have insertion holes. The sample water inlet pipe and the water outlet pipe are respectively tightly fitted into the insertion holes of the elastic plugs.

[0017] By adopting the above technical solution, the setting of the elastic soft plug can improve the sealing of the connection between the sample water inlet pipe and the outlet pipe and the Venturi tube, improve the accuracy of the test results, and make the connection and disassembly convenient and reliable, and facilitate the cleaning of the Venturi tube.

[0018] Optionally, the cap of the alkalizing agent bottle has a first through hole and a second through hole, the feed tube is inserted into the first through hole, and a vent tube is inserted into the second through hole, with a vent diaphragm inside the vent tube.

[0019] By adopting the above technical solution, the vent tube is used to balance the atmospheric pressure inside the alkalizing agent bottle. When the pressure in the middle of the Venturi tube decreases due to the flow of sample water, the atmospheric pressure forces the alkalizing agent in the alkalizing agent bottle into the Venturi tube through the feed tube via the vent tube. The vent membrane only allows gas to pass through, reducing the probability of the alkalizing agent in the alkalizing agent bottle volatilizing and causing environmental impact.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. In use, the sample water is fed into the Venturi tube through the sample water inlet pipe, and then into the measuring cell through the outlet pipe. As the sample water flows from the larger diameter end of the Venturi tube to the smaller diameter middle section, the flow rate increases and the pressure decreases. Under atmospheric pressure, the alkalizing agent in the alkalizing agent bottle is drawn into the Venturi tube through the inlet pipe. The alkalizing agent in the Venturi tube mixes with the sample water, thus alkalizing the sample water. The mixed liquid flowing into the measuring cell is used to detect sodium content through the detection electrode of the online sodium meter. The process of adding the alkalizing agent eliminates the need for an external pump, simplifies the alkalizing agent addition process, reduces maintenance workload, and greatly reduces the consumption of alkalizing agent, saving costs.

[0022] 2. The matching configuration of the base, slider, arc-shaped clamping block and drive mechanism ensures that the alkalizing agent bottle can be stably clamped and fixed during use, reducing the risk of the alkalizing agent bottle shaking and tipping over during the extraction of the alkalizing agent, and improving safety during use;

[0023] 3. The coordinated arrangement of the connecting rod, the moving block, and the elastic element allows the two sliders to be driven closer or further apart simply by moving the moving block. The structure is simple and easy to use. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the overall structure of the clamping and positioning system in the embodiments of this application;

[0027] Reference numerals: 1. Box body; 11. Box door; 2. Online sodium meter; 21. Detection electrode; 3. Alkalizing agent bottle; 31. Bottle cap; 311. First through hole; 312. Second through hole; 32. Vent pipe; 33. Vent diaphragm; 4. Measuring cell; 41. Drain pipe; 5. Venturi tube; 51. Elastic soft stopper; 511. Insertion hole; 6. Sample water inlet pipe; 7. Water outlet pipe; 8. Feed pipe; 9. Clamping and positioning system; 91. Base; 911. Sliding groove; 92. Slider; 93. Arc-shaped clamping block; 94. Buffer pad; 95. Connecting rod; 96. Moving block; 97. Elastic element; 98. Pressing rod; 99. Support block; 991. Through hole. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0029] This application discloses a pretreatment device for an online sodium analyzer. (Refer to...) Figure 1 The online sodium analyzer pretreatment device includes a housing 1, an online sodium analyzer 2, an alkalizing agent bottle 3, a measuring cell 4, and a venturi tube 5. The measuring cell 4 is fixedly installed on the bottom wall inside the housing 1, and a drain pipe 41 is connected to the bottom of the measuring cell 4. The online sodium analyzer 2 is installed on the top wall inside the housing 1, and a detection electrode 21 for insertion into the measuring cell 4 is connected to the online sodium analyzer 2 via wires.

[0030] The Venturi tube 5 is mounted on the inner wall of the housing 1 using clips. The inner diameter of the Venturi tube 5 is larger at both ends and smaller in the middle. Both ends of the Venturi tube 5 are fitted with flexible plugs 51, each with a hole 511 connecting to the inner cavity of the Venturi tube 5. A sample water inlet pipe 6 is tightly inserted into the hole 511 of the flexible plug 51 at one end of the Venturi tube 5, allowing the sample water to be tested to enter the Venturi tube 5. An outlet pipe 7 is tightly inserted into the hole 511 of the flexible plug 51 at the other end of the Venturi tube 5, with the other end of the outlet pipe 7 connected to the measuring cell 4. A feed pipe 8 is connected to the smaller inner diameter section of the Venturi tube 5. The alkalizing agent bottle 3 is fixedly installed inside the housing 1 using a clamping and positioning system 9. The end of the feed pipe 8 furthest from the Venturi tube 5 is inserted into the alkalizing agent bottle 3 through its opening.

[0031] In use, the sample water to be tested enters the Venturi tube 5 through the sample water inlet pipe 6, and then flows smoothly into the measuring cell 4 through the outlet pipe 7. When the sample water to be tested flows from the inlet of the Venturi tube 5 with a larger inner diameter to the middle part of the Venturi tube 5 with a smaller inner diameter, the flow velocity of the fluid will gradually increase, and at the same time, the pressure of the sample water to be tested at this point will gradually decrease. Under the action of atmospheric pressure, the alkalizing agent in the inlet pipe 8 connected here will be drawn into the Venturi tube 5 and enter the measuring cell 4 along with the sample water to be tested. The alkalizing agent achieves alkalization of the sample water to be tested during the mixing and flow process with the sample water to be tested. Finally, the sodium content of the sample water to be tested is detected by the detection electrode 21 of the online sodium meter 2.

[0032] This application's pretreatment device eliminates the need for an external pump to inject the alkalizing agent into the sample water, simplifying the alkalizing agent addition process, reducing maintenance workload, and lowering costs. Furthermore, since the amount of alkalizing agent added is controlled by the flow rate of the sample water, addition stops when the sample water flow ceases; as the flow rate of the sample water increases, the amount of alkalizing agent added also increases accordingly, ensuring the alkalinity of the sample water and improving the accuracy and reliability of the online sodium analyzer. Moreover, compared to the timed and quantitative injection of alkalizing agent using an external pump, significant savings in alkalizing agent consumption can be achieved. Experiments show that compared to using an external pump, fourteen bottles are saved per month, resulting in nearly 25,000 yuan in savings per year.

[0033] Furthermore, to improve sealing and thus the accuracy of alkalizing agent addition, the cap 31 of the alkalizing agent bottle 3 has a first through hole 311 and a second through hole 312. The feed tube 8 is inserted into the first through hole 311 and submerged in the alkalizing agent. The feed tube 8 is bonded and fixed to the first through hole 311 with sealant. A vent tube 32 is inserted into the second through hole 312 and is also bonded and fixed to the second through hole 312 with sealant. A vent diaphragm 33 is provided inside the vent tube 32, allowing only air to pass through. The vent tube 32 helps balance the atmospheric pressure inside the alkalizing agent bottle 3, preventing the Venturi tube 5 from failing to draw in the alkalizing agent. The vent diaphragm 33 prevents the alkalizing agent from evaporating into the air and causing environmental pollution. When it is necessary to replace the alkalizing agent with a new one, simply tighten the cap 31 onto the new alkalizing agent bottle 3. There is no need to repeatedly insert and remove the feed tube 8 and the vent tube 32, thereby increasing the stability and sealing of the connection between the alkalizing agent bottle 3, the feed tube 8 and the venturi tube 5.

[0034] Reference Figure 1-2 The clamping and positioning system 9 includes a base 91, sliders 92, arc-shaped clamping blocks 93, and a drive mechanism. The base 91 is horizontally fixedly installed on the bottom wall inside the housing 1. A horizontally extending sliding groove 911 is formed on the upper surface of the base 91. Two sliders 92 are provided, and both are slidably engaged in the sliding groove 911. The arc-shaped clamping blocks 93 are fixedly connected to the top of each slider 92, and a clamping cavity for clamping the alkali agent bottle 3 is formed between the two arc-shaped clamping blocks 93. In addition, in order to reduce the damage of the alkali agent bottle 3 to the arc-shaped clamping blocks 93, a buffer pad 94 is provided on the side of the arc-shaped clamping blocks 93 that is close to each other. The drive mechanism is set on the base 91 and is used to drive the two sliders 92 to move closer or further apart.

[0035] The driving mechanism includes a connecting rod 95, a moving block 96, an elastic element 97, and a pressing rod 98. The moving block 96 is slidably connected to the base 91 along a direction perpendicular to the extension line of the sliding groove 911. A pressing rod 98, which is arranged along its own moving direction, is fixedly connected to the moving block 96. A support block 99 is provided on the base 91, and a through hole 991 is opened on the support block 99, through which the pressing rod 98 passes. There are two connecting rods 95. One end of the connecting rod 95 is rotatably connected to the bottom of each slider 92 around the vertical axis. The ends of the two connecting rods 95 away from the sliders 92 are rotatably connected to the moving block 96 around the vertical axis. The elastic element 97 is a spring. The elastic element 97 is sleeved on the pressing rod 98. One end of the elastic element 97 is connected to the moving block 96, and the other end of the elastic element 97 is connected to the support block 99. The elastic element 97 tends to move the moving block 96 away from the line connecting the two sliders 92.

[0036] When it is necessary to replace the alkali agent bottle 3, pressing the pressing rod 98 moves the moving block 96 towards the sliding groove 911, thereby causing the end of the connecting rod 95 away from the moving block 96 to move away from each other, and the clamping blocks release their grip on the alkali agent bottle 3. After replacing the alkali agent bottle 3, pressing the pressing rod 98 is no longer required. The moving block 96 will then move away from the line connecting the two sliders 92 under the elastic force of the elastic element 97, thereby causing the end of the connecting rod 95 away from the moving block 96 to move closer to each other until the two clamping blocks clamp onto the alkali agent bottle 3, achieving clamping and positioning of the alkali agent bottle 3. The overall structure is relatively simple, the clamping and positioning of the alkali agent bottle 3 is convenient and reliable, and it is easy to use.

[0037] The implementation principle of the online sodium analyzer pretreatment device in this embodiment is as follows: During use, sample water is input into the Venturi tube 5 through the sample water inlet pipe 6. When the sample water flows from the end of the Venturi tube 5 with a larger inner diameter to the middle of the Venturi tube 5 with a smaller inner diameter, the flow rate of the sample water increases and the pressure decreases. Under the action of atmospheric pressure, the alkalizing agent in the inlet pipe 8 connected here is drawn into the Venturi tube 5 and then mixed with the sample water and enters the measuring cell 4. During the mixing and flow process, the sample water is alkalized. Finally, the sodium content of the sample water to be tested is detected by the detection electrode 21 of the online sodium analyzer 2. This eliminates the need for an external pump to pump the alkalizing agent into the sample water to be tested, simplifying the alkalizing agent addition process, reducing maintenance workload, and significantly reducing the consumption of alkalizing agent, thus saving costs.

[0038] When it is necessary to replace the alkali agent bottle 3, simply press the pressing rod 98 to move the moving block 96 towards the line connecting the two sliders 92. This causes the ends of the two connecting rods 95 away from the moving block 96 to move away from each other, thereby causing the two sliders 92 to move away from each other. After removing the old alkali agent bottle 3 and replacing it with a new one, stop pressing the pressing rod 98. The moving block 96 will then move away from the line connecting the two sliders 92 under the elastic force of the elastic element 97, thereby causing the two sliders 92 to move closer to each other. Finally, the two clamping blocks will clamp onto the alkali agent bottle 3, achieving clamping and positioning of the alkali agent bottle 3. The structure is simple, and the clamping and positioning process of the alkali agent bottle 3 is simple and quick.

[0039] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An on-line sodium analyser pre-treatment apparatus characterised in that: The utility model relates to a sodium content on-line measuring device, including box (1) and be located in the box (1) in on-line sodium content measuring device (2), alkalization agent bottle (3), measuring cell (4) and venturi (5), be equipped with detection electrode (21) for inserting measuring cell (4) on on-line sodium content measuring device (2), one end of venturi (5) is used for connecting sample water feed pipe (6), the other end of venturi (5) is connected measuring cell (4) through water outlet pipe (7), the inside diameter of venturi (5) is big in both ends and small in the middle, alkalization agent bottle (3) is communicated with the middle part of venturi (5) through feed pipe (8).

2. An on-line sodium analyser pre-treatment apparatus according to claim 1, characterised in that: The alkalization agent bottle (3) is fixedly installed in the box (1) through the clamping positioning system (9), the clamping positioning system (9) includes base (91), sliding block (92), arc clamping block (93) and drive mechanism, two groups of sliding blocks (92) are oppositely slidably arranged on the base (91), the arc clamping block (93) is arranged on a sliding block (92), and the drive mechanism is used for driving the two sliding blocks (92) to move close to or away from each other.

3. An on-line sodium analyser pre-treatment apparatus according to claim 2, characterised in that: The drive mechanism includes connecting rod (95), moving block (96) and elastic member (97), the moving block (96) is slidably connected on the base (91) in the direction perpendicular to the movement track of the two sliding blocks (92), the connecting rod (95) is provided with two, each connecting rod (95) is rotatably connected with a sliding block (92), and the ends, away from the sliding block (92), of the two connecting rods (95) are rotatably connected with the moving block (96); one end of the elastic member (97) is connected with the moving block (96), the other end of the elastic member (97) is connected with the base (91), and the elastic member (97) tends to move the moving block (96) to the direction away from the connecting line of the two sliding blocks (92).

4. An on-line sodium analyser pre-treatment apparatus according to claim 3, characterised in that: The base (91) is provided with a supporting block (99), a through hole (991) is formed in the supporting block (99), a pressing rod (98) is arranged on the moving block (96) in the moving direction of the moving block (96), and the pressing rod (98) penetrates the through hole (991).

5. An on-line sodium analyser pre-treatment apparatus according to claim 2, characterised in that: The side, close to each other, of the arc clamping block (93) is provided with a buffer gasket (94).

6. An on-line sodium analyser pre-treatment apparatus according to claim 1, characterised in that: Elastic soft plugs (51) are arranged at the openings of the two ends of the venturi (5), insertion holes (511) are formed in the elastic soft plugs (51), and the sample water feed pipe (6) and the water outlet pipe (7) are tightly and closely inserted into the insertion holes (511) of the elastic soft plugs (51) respectively.

7. The on-line sodium analyzer pre-treatment device of claim 1, wherein: First and second through holes (311) and (312) are formed in the bottle cap (31) of the alkalization agent bottle (3), the feed pipe (8) is inserted into the first through hole (311), a gas permeable tube (32) is inserted into the second through hole (312), and a gas permeable diaphragm (33) is arranged in the gas permeable tube (32).

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