JPH0713435U - Steam generator - Google Patents

Abstract

(57) [Summary] [Purpose] The generation of vapor in the vapor generation flask is kept extremely good, and the vapor is stably fed into the adjacent sample flask, greatly improving the sample recovery efficiency. Let [Structure] A hole is formed in an elastic lid stopper 4 of a steam generating flask 3, a rod 8 is inserted into the flask in close contact with the hole, and a cylindrical tube 9 is attached to a lower end portion of the rod 8. The upper end thereof is substantially flush with the water surface of the water 11 in the flask, and the lower end thereof has a length slightly above the bottom surface of the flask and is fixed to the lower end of the rod. In another embodiment, a plurality of small holes 28 are provided on the circumferential surface above the tubular tube 9, and a blind 29 is provided at the upper end of the tubular tube.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a steam generator for a steam generating flask in the analysis work of a solution such as factory wastewater, and more specifically, to transfer the steam generated in the steam generating flask into an adjacent sample flask through a pipe in a timely manner. According to the above, the present invention relates to a steam generator for recovering the target component contained in the sample solution (sample) in the adjacent sample flask to the outside beaker by the action of the steam.

[0002]

[Prior art]

 Conventionally, this type of steam generator has been used in the sample flask to generate the components such as fluorine, ammonium ion, and nitrate ion contained in the solution of the sample placed in the sample flask. In the case of fluorine, the fluorine contained in the solution in the sample flask reacts with perchloric acid, phosphoric acid, silicon dioxide, etc. contained in the solution as a reagent, and the fluorine Extracted as silicon oxide. This is collected in an outside beaker and moved to the next step for analysis. In the steam generator, a flask containing water is placed on a mantle heater and boiled. In addition, boiling instruments (commercially available products) such as boiling stones, net rings, and fine glass tubes are placed in the flask to promote the generation of steam. The steam generated in this steam generation flask is sent to the adjacent sample flask through a pipe, at which time the sample solution (sample) is placed in the sample flask, and perchloric acid, phosphoric acid, A reagent such as silicon dioxide is added, and this is also heated by a mantle heater and is controlled by a temperature sensor so as to maintain 145 ± 5 ° C. When the temperature of the solution is low, the water vapor is condensed to increase the liquid volume and the acid concentration is lowered, so that the fluorine compound cannot be distilled. The vapor thus sent from the vapor generation flask reacts with the solution in the sample flask, and in the case of fluorine in the solution, it is recovered as silicon fluoride in the beaker through a cooling pipe.

[0003]

[Problems to be Solved by the Invention] However, in a steam generator, even if a boiling tool is put in to promote the generation of steam, water is kept in good convection and is included in water generated by heat. The gas may not be able to prevent sudden bumping due to expansion, and there was a problem in workability and safety. That is, as shown in FIG. 3, conventional boiling stones a, a mesh ring b, a fine glass tube c (all of which are enlarged views, and these are put in the bottom of the steam generation flask) Even if it is possible to promote convection of water to some extent and to mitigate the sudden bumping due to the expansion of the gas contained in the water, sometimes sudden bumping occurs, and due to the abnormal pressure, the cap stopper of the steam generation flask etc. It was in a dangerous state of coming out. Also, the steam generated in the steam generation flask is sent into the sample flask through a tube, but if this steam is not sent stably into the sample flask and is interrupted, the heated sample solution in the sample flask will disappear. However, since it flowed back to the steam generation flask side and mixed into the hot water before it became steam, the sample could not be recovered, and it had to be restarted from the beginning.

[0004]

[Means for Solving the Problems]

 In order to solve such a problem, the present invention has a method in which a hole is formed in a lid plug of an elastic body at the mouth of a steam generating flask, and the rod is inserted into a tube at the lower end of the rod inserted in close contact with the hole. The tube is shaped like a pipe fixed to the rod so that its upper end is almost flush with the water surface and its lower end is located slightly above the bottom of the flask. In the embodiment, the steam generating device is one in which a plurality of small holes are provided on the circumferential surface above the tubular tube and a blind is provided at the upper end of the tubular tube.

[0005]

【Example】

 An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory view showing the whole steam generating apparatus of the present invention, FIG. 2 is another embodiment of the present invention, 1 is a steam generating apparatus, 2 is a steam mantle heater, 3 is a steam generating flask, 4 is Elastic lid stopper, 5 hole of lid stopper, 6 water injection pipe, 7 water injection valve, 8 rod, 9 tubular pipe, 10 stopper, 11 water, 12 vapor transfer pipe, 13 is a mantle heater for samples, 14 is a sample flask, 15 is an elastic lid stopper, 16 is a vapor transfer valve, 17 is a vapor discharge valve, 18 is a sample injection pipe, 19 is a sample injection valve, and 20 is a solution temperature. Sensor, 21 is a sample solution, 22 is a sample collection pipe, 23 is a cooler, 24 is a sample collection beaker, 25 is a liquid amount sensor, 26 is a wash water injection pipe, 27 is a wash water drain pipe, 28 is a plurality of small holes , 29 is blind.

In the steam generator 1, a steam generation flask 3 containing about 800 ml of water 11 is placed on a steam mantle heater 2 to boil water. The steam generated in the steam generating flask 3 is sent to the adjacent sample flask 14 through the steam transfer pipe 12. On the other hand, about 100 ml of the sample solution 21 (40 ml of the reagent perchloric acid, 1 ml of phosphoric acid, 1 g of silicon dioxide and the rest is the sample solution) is placed in the sample flask 14, and this is also the sample mantle heater. Heat at 13, which is controlled by the solution temperature sensor 20 to maintain a temperature of 145 ± 5 ° C. The boiling point of the reagent is high, and the boiling point of perchloric acid is 203 ° C.

The steam generating flask 3 and the sample flask 14 are initially shut off by a steam transfer valve 16 and steam is released to the outside by a steam discharge valve 17. In this way, when the temperature of the sample solution in the sample flask 14 is controlled to 145 ± 5 ° C, the vapor transfer valve 16 is opened and the vapor discharge valve 17 is closed to let vapor pass. The sent vapor reacts with the sample solution 21 in the sample flask 14, and in the case of fluorine, it is recovered as silicon fluoride through the sample recovery pipe 22 and the cooler 23 in the sample recovery beaker 24. The sample collected in the sample recovery beaker 24 is 200 ml, and when the effluent reaches about 200 ml, the total amount of fluorine is said to have flowed out. When the specified amount is reached in this way, the liquid amount sensor 25 operates to complete a series of operations and the control devices stop. Each valve of the device is a solenoid valve, and is automatically controlled, and the temperature of the solution is automatically controlled. Distillation is completed in about 50 minutes (about 5 ml per minute). After the work is finished, the inside of the sample flask 14 is washed by spraying water from the washing water injection pipe 26, and is drained from the washing drain pipe 27. (The wash water injection valve and the wash water drain valve are not shown.)

In the steam generator 1 of the present invention, an elastic cap 4 attached to the mouth of a steam generating flask 3 is provided with a hole 5 for the cap from the outer surface toward the inner surface of the flask. The body 8 is passed through. There is no gap between the elastic lid plug 4 and the rod body 8, and the rod body 8 is attached so that the rod body 8 is tightened by the elastic lid plug 4. A tubular tube 9 is fixed to a lower end portion of the rod body 8 by a stopper 10. (The stopper 10 may be stopped by any method.) The length of the cylindrical tube 9 is such that the upper end thereof is almost the same as the water surface in the state where water 11 is put in the steam generating flask 3. The bottom end of the steam generating flask 3 is located slightly above the bottom of the flask. In yet another embodiment, a plurality of small holes 28 are provided on the circumferential surface above the tubular tube 9 and a blind 29 is provided at the upper end of the tubular tube.

[0009]

[Work]

 The water 11 contained in the steam generating flask 3 of the steam generating apparatus 1 of the present invention is heated by the steam mantle heater 2. In this way, the water in the steam generating flask 3 undergoes water convection and eventually boils to generate steam. At this time, the function of the cylindrical tube 9 of the present invention will be described. The water in the steam generating flask 3 is heated by the steam mantle heater 2 from the bottom portion of the flask and convection occurs. At that time, the tubular tube 9 forms a tube from the lower end portion to the upper end portion at substantially the center of the water in the flask 3, and in another embodiment, on the circumferential surface above the tubular tube, Since there are multiple small holes and a blind is provided at the upper end of the tubular pipe, there is a large temperature difference between the lower and upper parts of the water, and therefore the water flow from the lower end to the upper end inside the pipe. As a result, the action of causing water to move rapidly occurs, and the sudden bumping due to the remarkable expansion of gas at the bottom part is absorbed by the tubular tube and alleviated. Further, in another embodiment, a tubular pipe having a plurality of small holes in the upper circumferential surface of the tubular pipe and a blind plate provided at the upper end of the tubular pipe may be used. Works the same way. By repeating such an action, convection of water in the steam generating flask 3 is promoted, and sudden bumping is alleviated, so that boiling of water and unevenness of steam generation in the flask thereafter are omitted.

[0010]

EFFECTS OF THE INVENTION By carrying out the present invention, since the steam generation in the steam generation flask is kept extremely good, a sudden bumping occurs, and the abnormal pressure causes the cap stopper of the steam generation flask to come off. There is no danger. Also, the steam generated in the steam generation flask is sent into the sample flask through a pipe, but since this steam is now stably sent into the sample flask, it becomes impossible to collect the sample, There was no need to start over from the beginning, and the efficiency of the distillation work was greatly improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing the entire steam generator of the present invention.

FIG. 2 is an enlarged view showing another embodiment of the steam generator of the present invention.

FIG. 3 is an explanatory diagram of a conventional steam generator.

[Explanation of symbols]

a ... boiling stone b ... mesh ring c ... thin glass tube 1 ... steam generator 2 ... steam mantle heater 3 ... steam generating flask 4 ... elastic lid cap 5 ... Hole of lid plug 6 ... Water injection pipe 7 ... Water injection valve 8 ... Rod 9 ... Cylindrical pipe 10 ... Stopper 11 ... Water 12 ... Steam Transfer tube 13 ・ ・ ・ Sample mantle heater 14 ・ ・ ・ Sample flask 15 ・ ・ ・ Elastic cap 16 ・ ・ ・ Steam transfer valve 17 ・ ・ ・ Steam release valve 18 ・ ・ ・ Sample injection tube 19 ・ ・ ・Sample injection valve 20 ・ ・ ・ Solution temperature sensor 21 ・ ・ ・ Sample solution 22 ・ ・ ・ Sample collection pipe 23 ・ ・ ・ Cooler 24 ・ ・ ・ Sample collection beaker 25 ・ ・ ・ Liquid sensor 26 ・ ・ ・ Washing water Water pipe 27 ・ ・ ・ Washing water drain pipe 28 Multiple small holes 29 Blind plate

Claims (2)

[Scope of utility model registration request] 1. A hole is formed in a lid stopper of an elastic body at the mouth of a steam generating flask, and a cylindrical tube is attached to the lower end of a rod inserted in close contact with the hole. The steam generator is characterized in that the portion is substantially flush with the water surface of the water, and the lower end thereof is fixed to the rod so as to be located slightly above the bottom surface of the flask. 2. The steam generator according to claim 1, wherein a plurality of small holes are provided on the circumferential surface above the tubular tube, and a blind is provided at the upper end of the tubular tube.