Sampling and specific gravity measuring device for hydrochloric acid synthesis furnace

Abstract

The utility model relates to the technical field of chemical production devices, and discloses a hydrochloric acid synthesis furnace sampling and specific gravity measuring device which comprises a hydrochloric acid synthesis furnace, an acid discharging port of the hydrochloric acid synthesis furnace is communicated with an industrial hydrochloric acid storage tank through a first pipeline and is communicated with a high-purity hydrochloric acid storage tank through a second pipeline, and the high-purity hydrochloric acid storage tank is communicated with an industrial hydrochloric acid storage tank through a second pipeline. The acid discharging port is further connected with a sampling pipeline, the sampling pipeline is provided with a first branch and a second branch, the sampling pipeline is communicated with the lower port of the acrylic container through the first branch, the first branch is provided with a first sampling stop valve, the sampling pipeline is connected with the sampling container through the second branch, and the second branch is provided with a second sampling stop valve; the lower end of the acrylic container is also connected with a liquid discharge pipe, the lower end of the acrylic container is communicated with the industrial hydrochloric acid storage tank through the liquid discharge pipe, the liquid discharge pipe is provided with a sampling liquid discharge valve, and an inner cavity of the acrylic container is provided with a hydrometer. According to the utility model, hydrochloric acid waste liquid is prevented from splashing, and meanwhile, acid mist can be prevented from flying out.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production devices, in particular to a device for sampling and measuring specific gravity of a hydrochloric acid synthesis furnace. Background Art

[0002] At present, hydrochloric acid synthesis is usually carried out by using hydrogen and chlorine sent from the upstream process. After impurities are removed and pressurized, they are introduced into the hydrogen chloride synthesis furnace in a certain ratio. Hydrogen chloride is generated by flame combustion. Hydrogen chloride contacts high-purity water in the synthesis furnace to produce hydrochloric acid. In the process of producing hydrochloric acid, it is necessary to sample the hydrochloric acid and test its specific gravity and concentration. At present, the hydrochloric acid waste liquid generated during the sampling and specific gravity testing in the synthesis furnace is generally recovered into the industrial hydrochloric acid storage tank through the open recovery tank at the sampling port. However, during the sampling process, a large amount of waste hydrochloric acid will splash from the open recovery tank, causing pollution to the surrounding environment. At the same time, a large amount of acid mist will also float out of the open recovery tank, which will pollute the surrounding environment and cause harm to surrounding equipment and personnel. Utility Model Content

[0003] Purpose of the utility model: In response to the problems existing in the prior art, the utility model provides a device for sampling and measuring specific gravity of a hydrochloric acid synthesis furnace, which prevents the splashing of hydrochloric acid waste liquid and avoids the emission of acid mist, thereby reducing environmental pollution and the damage of acid mist to equipment and personnel.

[0004] Technical solution: The utility model provides a hydrochloric acid synthesis furnace sampling and specific gravity measuring device, comprising: a hydrochloric acid synthesis furnace, the lower acid port of the hydrochloric acid synthesis furnace is connected to a first pipe and a second pipe, the lower acid port is connected to an industrial hydrochloric acid storage tank through the first pipe, the lower acid port is connected to a high-purity hydrochloric acid storage tank through the second pipe, the lower acid port is also connected to a sampling pipe, the sampling pipe is provided with a first branch and a second branch, the sampling pipe is connected to the lower port of an acrylic container through the first branch, a first sampling shut-off valve is provided on the first branch, the sampling pipe is connected to the sampling container through the second branch, a second sampling shut-off valve is provided on the second branch, the lower port of the acrylic container is also connected to a drain pipe, the lower port of the acrylic container is connected to the industrial hydrochloric acid storage tank through the drain pipe, the drain pipe is provided with a sampling drain valve, and the inner cavity of the acrylic container is provided with a specific gravity meter.

[0005] Furthermore, a funnel is provided at the upper end of the acrylic container and connected to the upper end of the acrylic container via a funnel lower valve. Leveraging the acrylic container's transparency and corrosion resistance, the container is protected from corrosion by hydrochloric acid and facilitates observation, allowing for direct visual observation during specific gravity measurement. The funnel is positioned above the acrylic container, allowing waste hydrochloric acid to flow directly into the acrylic container through the funnel and then, through the lower end of the acrylic container, through a drain pipe into an industrial hydrochloric acid storage tank for recovery.

[0006] Furthermore, the lower acid port of the hydrochloric acid synthesis furnace is also provided with a thermometer for measuring the lower acid temperature at the lower acid port to ensure that the lower acid temperature is below 40° C. to prevent the hydrochloric acid temperature from being too high and damaging the pipeline.

[0007] Furthermore, a first valve is provided on the first pipeline, and the first valve is used to control the hydrochloric acid in the first pipeline to enter the industrial hydrochloric acid storage tank.

[0008] Furthermore, a second valve is provided on the second pipeline, and the second valve is used to control the hydrochloric acid in the second pipeline to enter the high-purity hydrochloric acid storage tank.

[0009] Preferably, it also includes a hydrochloric acid sampling main valve, and the lower acid port is connected to the sampling pipeline through the hydrochloric acid sampling main valve.

[0010] Beneficial Effects: Compared with the prior art, the hydrochloric acid synthesis furnace sampling and specific gravity measurement device provided by the present invention optimizes and transforms the hydrochloric acid sampling and specific gravity measurement device during the operation of the hydrochloric acid synthesis furnace, prevents the splashing of hydrochloric acid waste liquid, avoids the emission of acid mist, reduces environmental pollution and the damage caused by acid mist to equipment and personnel. Its specific beneficial effects are as follows:

[0011] The device realizes the closed operation of sampling and measuring specific gravity during the hydrochloric acid synthesis process, preventing the splashing of hydrochloric acid waste liquid and avoiding the emission of acid mist.

[0012] After the specific gravity measurement is completed, the hydrochloric acid waste liquid can be directly returned through the lower port of the acrylic container through the drain pipe into the industrial hydrochloric acid storage tank for sale, completing the recycling.

[0013] On the one hand, this device can measure specific gravity, and on the other hand, it can also sample hydrochloric acid and then test the hydrochloric acid concentration. The waste liquid generated by the hydrochloric acid concentration test can directly enter the acrylic container through the funnel, and then enter the industrial hydrochloric acid storage tank through the drain pipe from the lower port of the acrylic container to complete the recovery.

[0014] The device is easy to operate, and waste liquid generated by specific gravity testing and waste liquid generated by hydrochloric acid concentration testing can be conveniently and effectively recovered, with a high recovery rate.

[0015] In actual production, the specific gravity of the synthesized hydrochloric acid needs to be measured every hour during the operation of the hydrochloric acid synthesis furnace. This device can realize online measurement of the specific gravity of hydrochloric acid, which is convenient, fast and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a sampling and specific gravity measuring device for a hydrochloric acid synthesis furnace of the present invention;

[0017] Illustrations: 1. Hydrochloric acid synthesis furnace; 2. Industrial hydrochloric acid storage tank; 3. High-purity hydrochloric acid storage tank; 4. Sampling container; 5. Acrylic container; 6. Hydrometer; 7. Funnel; 8. Thermometer; 9. First pipeline; 10. Second pipeline; 11. Sampling pipeline; 12. First branch; 13. Second branch; 14. Drain pipe; 15. First valve; 16. Second valve; 17. Hydrochloric acid sampling main valve; 18. First sampling shut-off valve; 19. Second sampling shut-off valve; 20. Sampling drain valve; 21. Funnel bottom liquid valve. DETAILED DESCRIPTION

[0018] The present invention is described in detail below with reference to the embodiments.

[0019] Implementation method 1:

[0020] This embodiment provides a device for sampling and measuring specific gravity of a hydrochloric acid synthesis furnace, such as Figure 1 As shown, it comprises: a hydrochloric acid synthesis furnace 1, the lower acid port of the hydrochloric acid synthesis furnace 1 is connected to a first pipe 9, a second pipe 10 and a sampling pipe 11; the lower acid port is connected to the industrial hydrochloric acid storage tank 2 through the first pipe 9, and the first pipe 9 is provided with a first valve 15; the lower acid port is connected to the high-purity hydrochloric acid storage tank 3 through the second pipe 10, and the second pipe 10 is provided with a second valve 16; the lower acid port is provided with a thermometer 8; the sampling pipe 11 is provided with a hydrochloric acid sampling main valve 17; the sampling pipe 11 is provided with a first branch 12 and a second branch 13, and the sampling pipe 11 is connected to the second branch 13. The second branch 13 is connected to the sampling container 4, and a second sampling shut-off valve 19 is provided on the second branch 13; the sampling pipe 11 is connected to the lower port of the acrylic container 5 through the first branch 12, and a first sampling shut-off valve 18 is provided on the first branch 12; a hydrometer 6 is provided in the inner cavity of the acrylic container 5, and the lower port of the acrylic container 5 is connected to the industrial hydrochloric acid storage tank 2 through a drain pipe 14, and a sampling drain valve 20 is provided on the drain pipe 14; a funnel 7 is provided at the upper port of the acrylic container 5, and the funnel 7 is connected to the upper port of the acrylic container 5 through a funnel lower liquid valve 21.

[0021] The detection process and principle of this device are as follows:

[0022] On the one hand, during the operation of the hydrochloric acid synthesis furnace, the synthetic hydrochloric acid is measured for specific gravity every hour: first, the hydrochloric acid sampling main valve 17, the second sampling shut-off valve 19 and the sampling drain valve 20 are ensured to be closed, and the funnel lower liquid valve 21 and the first sampling shut-off valve 18 are ensured to be opened. Then the sampling valve main valve 17 is slowly opened, and the hydrochloric acid in the hydrochloric acid synthesis furnace 1 enters the acrylic container 5 through the lower acid port via the first branch 12 of the sampling pipeline 11 through the lower port of the acrylic container 5. The hydrochloric acid liquid level in the visual acrylic container 5 slowly rises. After the hydrometer 6 in the acrylic container 5 floats up, the sampling valve main valve 17 is closed, and the hydrometer 6 is then read to complete the hydrochloric acid specific gravity measurement; after the reading is completed, the sampling drain valve 20 is opened, and the hydrochloric acid in the acrylic container 5 is discharged into the industrial hydrochloric acid storage tank 2 through the lower port via the drain pipe 14. The hydrochloric acid is exhausted, and the sampling drain valve 20 and the funnel lower liquid valve 21 are closed to complete the recovery of the hydrochloric acid waste liquid for specific gravity measurement.

[0023] On the other hand, when it is necessary to sample the hydrochloric acid synthesized in the hydrochloric acid synthesis furnace for hydrochloric acid concentration detection: ensure that the first sampling shut-off valve 18 is closed, ensure that the second sampling shut-off valve 19 is opened, then slowly open the hydrochloric acid sampling main valve 17, and the synthetic hydrochloric acid in the hydrochloric acid synthesis furnace 1 passes through the sampling pipe 11 through the lower acid port and enters the sampling container 4 through the second branch 13 to complete the sampling, close the hydrochloric acid sampling main valve 17 and the second sampling shut-off valve 19, and the obtained hydrochloric acid sample is sent to the detection room for hydrochloric acid concentration detection; the hydrochloric acid waste liquid after the hydrochloric acid concentration detection can be poured into the funnel 7, the sampling drain valve 20 and the funnel lower liquid valve 21 are opened, and the hydrochloric acid waste liquid enters the acrylic container 5 through the upper port of the acrylic container 5 through the funnel 7, and then is discharged into the industrial hydrochloric acid storage tank 2 through the drain pipe 14 through the lower port to complete the recovery.

[0024] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A device for sampling and measuring specific gravity of a hydrochloric acid synthesis furnace, characterized in that: include: A hydrochloric acid synthesis furnace (1), wherein the lower acid port of the hydrochloric acid synthesis furnace (1) is connected to a first pipe (9) and a second pipe (10), wherein the lower acid port is connected to an industrial hydrochloric acid storage tank (2) through the first pipe (9), and the lower acid port is connected to a high-purity hydrochloric acid storage tank (3) through the second pipe (10), and the lower acid port is further connected to a sampling pipe (11), wherein the sampling pipe (11) is provided with a first branch (12) and a second branch (13), and the sampling pipe (11) is connected to the lower port of an acrylic container (5) through the first branch (12), and the first branch (13) is connected to the lower port of the acrylic container (5). A first sampling shut-off valve (18) is provided on the branch (12); the sampling pipe (11) is connected to the sampling container (4) through the second branch (13); the second sampling shut-off valve (19) is provided on the second branch (13); the lower port of the acrylic container (5) is further connected to a drain pipe (14); the lower port of the acrylic container (5) is connected to the industrial hydrochloric acid storage tank (2) through the drain pipe (14); the drain pipe (14) is provided with a sampling drain valve (20); and the inner cavity of the acrylic container (5) is provided with a hydrometer (6).

2. The device for sampling and measuring specific gravity of a hydrochloric acid synthesis furnace according to claim 1, wherein: A funnel (7) is provided at the upper end of the acrylic container (5), and the funnel (7) is connected to the upper end of the acrylic container (5) via a funnel lower liquid valve (21).

3. The device for sampling and measuring specific gravity of a hydrochloric acid synthesis furnace according to claim 1, characterized in that: The lower acid port of the hydrochloric acid synthesis furnace (1) is also provided with a thermometer (8).

4. The device for sampling and measuring specific gravity of a hydrochloric acid synthesis furnace according to claim 1, characterized in that: A first valve (15) is provided on the first pipeline (9).

5. The device for sampling and measuring specific gravity of a hydrochloric acid synthesis furnace according to claim 1, characterized in that: A second valve (16) is provided on the second pipeline (10).

6. The device for sampling and measuring specific gravity of a hydrochloric acid synthesis furnace according to claim 1, characterized in that: It also includes a hydrochloric acid sampling main valve (17), and the lower acid port is connected to the sampling pipeline (11) through the hydrochloric acid sampling main valve (17).

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