Device for measuring total phosphate in boiler water and cooling water

Abstract

The utility model discloses equipment for measuring total phosphate in boiler water and cooling water, and belongs to the technical field of devices for measuring phosphate. A device for measuring total phosphate in boiler water and cooling water comprises a pipette, a colorimetric tube, a spectrophotometer, filter paper and a beaker, and further comprises a water bath kettle used for heating the colorimetric tube; the placing groove is formed in the water bath kettle, and the placing groove is used for placing a colorimetric tube; the plurality of groups of hollowed-out hole baskets are arranged in the placing groove; a filtered sample is directly added into the colorimetric tube, is digested for half an hour in a water bath environment, and then is cooled for colorimetric, so that the risks of breakage and incomplete transfer caused by directly heating a flask with open fire are effectively avoided, the accuracy of an analysis result is ensured, and the threaded column and the jacking ring can be matched with a screw rod, so that the detection accuracy is improved. Furthermore, the position of the colorimetric tube is adjusted, so that the colorimetric tubes with different lengths can be conveniently heated.

Description

Technical Field

[0001] This utility model relates to the technical field of phosphate determination devices, and in particular to a device for determining total phosphate in boiler water and cooling water. Background Technology

[0002] In industrial production, it is crucial to accurately determine the total phosphate content in boiler water and cooling water. The total phosphate content not only relates to equipment corrosion and scaling, but also has a certain impact on the safety and stability of industrial production. The commonly used method is to use potassium persulfate, a strong oxidant, in an acidic environment to decompose organic phosphates in the water sample by heating, converting them into orthophosphates, while simultaneously promoting the hydrolysis of polyphosphates into orthophosphates.

[0003] The traditional procedure is as follows: First, draw water sample filtered through medium-speed filter paper into an Erlenmeyer flask, add sulfuric acid solution and potassium persulfate solution, then place the Erlenmeyer flask on an adjustable electric stove and slowly boil it over low heat for 30 minutes. After the reaction is complete, remove the Erlenmeyer flask and let it cool slightly, then cool it to room temperature with running water. During this process, rinse the inner wall of the Erlenmeyer flask with small amounts of water several times to ensure that the residue inside the flask is completely dissolved. Finally, transfer the solution to a volumetric flask for subsequent colorimetric analysis.

[0004] However, this direct heating digestion method uses an open flame, and the conical flask is heated unevenly during the heating process, which makes it very easy to break. This not only increases the safety risks of the experimental operation, but may also lead to experimental failure, requiring the experiment to be repeated, wasting time and resources.

[0005] Therefore, an apparatus for determining total phosphate in boiler water and cooling water is provided to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to solve the problems mentioned in the background art by providing a device for determining total phosphate in boiler water and cooling water.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An apparatus for determining total phosphate in boiler water and cooling water, comprising a pipette, a colorimetric tube, a spectrophotometer, filter paper, and a beaker, further comprising:

[0009] A water bath is used to heat the contrast tubes.

[0010] A placement tank is provided inside the water bath, and the placement tank is used to place colorimetric tubes.

[0011] Multiple sets of perforated baskets are all placed in the placement slot;

[0012] A threaded post is disposed inside the perforated basket, and the threaded post is a hollow post.

[0013] A lifting ring, threadedly connected to the threaded post, is used to hold the colorimetric tube in place and to adjust the position of the colorimetric tube in the perforated basket.

[0014] To adjust the height of the perforated basket, preferably, a groove is provided in the placement slot, a lead screw is rotatably connected in the groove, a sliding block is threaded onto the lead screw, the sliding block is slidably connected in the groove, and the perforated basket is fixedly connected to the sliding block.

[0015] For ease of disassembly, preferably, a connecting block is fixedly connected to the perforated basket, and a mounting bolt is threaded onto the connecting block. The mounting bolt is used to connect the connecting block to the sliding block.

[0016] Preferably, a rotating handle is fixedly connected to the lead screw.

[0017] Preferably, the filter paper is a qualitative medium-speed filter paper.

[0018] Compared with the prior art, this utility model provides a device for determining total phosphate in boiler water and cooling water, which has the following advantages:

[0019] This invention effectively avoids the risks of flask breakage and incomplete transfer caused by directly adding the filtered sample into the colorimetric tube and digesting it in a water bath for half an hour before cooling and colorimetric analysis. This ensures the accuracy of the analytical results. Furthermore, the threaded column and lifting ring can work with the lead screw to adjust the position of the colorimetric tube, facilitating the heating of colorimetric tubes of different lengths. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a device for determining total phosphate in boiler water and cooling water according to the present invention.

[0021] Figure 2 This is a cross-sectional structural schematic diagram of a device for determining total phosphate in boiler water and cooling water according to the present invention.

[0022] Figure 3 This invention provides a device for determining total phosphate in boiler water and cooling water. Figure 2 A schematic diagram of the structure of part A;

[0023] Figure 4 This is a schematic diagram of the perforated basket structure in the equipment for determining total phosphate in boiler water and cooling water proposed in this utility model.

[0024] In the diagram: 1. Water bath; 101. Groove; 201. Lead screw; 202. Rotating handle; 203. Sliding block; 3. Perforated basket; 301. Threaded column; 302. Lifting ring; 303. Connecting block; 304. Mounting bolt. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example:

[0027] Reference Figure 1-4 A device for determining total phosphate in boiler water and cooling water includes a pipette, colorimetric tubes, a spectrophotometer, filter paper, and a beaker. It also includes: a water bath 1 for heating the colorimetric tubes; a placement trough inside the water bath 1 for holding the colorimetric tubes; multiple sets of perforated baskets 3, all placed in the placement trough; a threaded column 301, a hollow column, placed inside the perforated baskets 3; and a lifting ring 302 threadedly connected to the threaded column 301, used to hold the colorimetric tubes in place and adjust their position within the perforated baskets. At position 3, a groove 101 is provided in the placement slot. A lead screw 201 is rotatably connected in the groove 101. A sliding block 203 is threadedly connected to the lead screw 201. The sliding block 203 is slidably connected in the groove 101. The perforated basket 3 is fixedly connected to the sliding block 203. A connecting block 303 is fixedly connected to the perforated basket 3. A mounting bolt 304 is threadedly connected to the connecting block 303. The mounting bolt 304 is used to connect the connecting block 303 and the sliding block 203. A rotating handle 202 is fixedly connected to the lead screw 201. The filter paper is a qualitative medium-speed filter paper.

[0028] The following equipment and materials are required for determining the total phosphate content in boiler water and cooling water:

[0029] I. Reagents

[0030] Reagent 1: Potassium dihydrogen phosphate;

[0031] Reagent 2, sulfuric acid: 1+1 solution;

[0032] Reagent 3, ascorbic acid: 20 g / L;

[0033] Reagent 4, Ammonium molybdate solution: 26 g / L;

[0034] Reagent 5, Potassium persulfate: 40 g / L;

[0035] Reagent 6, Sodium hydroxide solution: 80 g / L.

[0036] II. Instruments

[0037] Instrument 1: Pipettes: 5ml, 2ml, 1ml;

[0038] Instrument 2, colorimetric tubes: 100ml;

[0039] Instrument 3: 18-well water bath (can hold 100ml and 50ml colorimetric tubes);

[0040] Instrument 4: Spectrophotometer;

[0041] Instrument 5: Qualitative medium-speed filter paper;

[0042] Instrument 6, Beaker: 100ml.

[0043] III. Operating Procedures.

[0044] Take 5.00 mL of water sample filtered through medium-speed filter paper into a 100 mL colorimetric tube, add 1.0 mL of (1+35) sulfuric acid solution and 5.0 mL of potassium persulfate solution, place the tube in a water bath 1 at 95 °C, and boil for 30 min. Remove the tube, let it cool slightly, and then cool it to room temperature with running water. Rinse the inner wall with water in small amounts several times and shake well. Add 2.0 mL of ammonium molybdate solution and 3.0 mL of ascorbic acid solution, dilute with water to the mark, and shake well. After standing for 10 min, measure the absorbance at 710 nm using a 1 cm cuvette with a reagent blank as a reference.

[0045] IV. Experimental Results

[0046] The total phosphate content Y in water (as PO43-) is calculated using the following formula:

[0047]

[0048] Where: m—mass of PO43- obtained from the standard curve or by its regression equation, in mg;

[0049] v — Volume of water sample taken, mL.

[0050] Specifically, when heating the colorimetric tubes through the water bath 1, first heat water in the placement tank inside the water bath 1. Then, depending on the number and length of the colorimetric tubes to be heated, insert the colorimetric tubes into the threaded post 301 and the lifting ring 302 in sequence. Then, rotate the screw 201 to adjust the length of the perforated basket 3 to prevent the bottom of the colorimetric tube from directly contacting the bottom of the placement tank, thus avoiding damage to the colorimetric tubes due to overheating. Alternatively, the position of the lifting ring 302 can be adjusted by rotating it to prevent the hot water in the water bath 1 from overflowing into the colorimetric tubes.

[0051] Once the location is determined, the heating function of water bath 1 can be activated to heat the color tube.

[0052] This invention effectively avoids the risks of flask breakage and incomplete transfer caused by directly adding the filtered sample into the colorimetric tube and digesting it in a water bath for half an hour before cooling and colorimetric analysis. This ensures the accuracy of the analytical results. Furthermore, the threaded column 301 and the lifting ring 302 can cooperate with the lead screw 201 to adjust the position of the colorimetric tube, facilitating the heating of colorimetric tubes of different lengths.

[0053] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for determining total phosphates in boiler water and cooling water comprising a pipette, a cuvette, a spectrophotometer, filter paper, a beaker, characterized in that, Also include: Water bath (1) for heating the colorimetric tube; Placement slot, provided in the water bath (1), the placement slot is used for placing the colorimetric tube; A plurality of groups of perforated baskets (3) are arranged in the placement slot; Threaded column (301) is arranged in the perforated basket (3), the threaded column (301) is a hollow column; Jacking ring (302) is threadedly connected on the threaded column (301), the jacking ring (302) is used for resisting the colorimetric tube, for adjusting the position of the colorimetric tube in the perforated basket (3).

2. The apparatus for measuring total phosphates in boiler water and cooling water according to claim 1, characterized by The placement slot is provided with a groove (101), the groove (101) is rotatably connected with a lead screw (201), the lead screw (201) is threadedly connected with a sliding block (203), the sliding block (203) is slidably connected in the groove (101), the perforated basket (3) is fixedly connected with the sliding block (203).

3. The apparatus for measuring total phosphates in boiler water and cooling water according to claim 2, characterized by The perforated basket (3) is fixedly connected with a connecting block (303), the connecting block (303) is threadedly connected with a mounting bolt (304), the mounting bolt (304) is used for connecting the connecting block (303) and the sliding block (203).

4. The apparatus for measuring total phosphates in boiler water and cooling water according to claim 2, characterized by The lead screw (201) is fixedly connected with a rotating handle (202).

5. The apparatus for measuring total phosphates in boiler water and cooling water according to claim 1, characterized by The filter paper is a qualitative medium-speed filter paper.

Images