Sampling device of hydrochloric acid synthesis furnace

Abstract

The utility model discloses a hydrochloric acid synthetic furnace sampling device which comprises a synthetic furnace and a first sampling valve connected with the synthetic furnace, the first sampling valve is connected with a sampling stop valve through a first sampling pipeline, the sampling stop valve is connected with a closed sampling device through a second sampling pipeline, and a funnel liquid discharging valve is arranged at the upper end of the closed sampling device. An open recovery tank of an original hydrochloric acid synthesis furnace is transformed into a closed sampling system, so that hydrochloric acid waste liquid is prevented from splashing, and meanwhile, acid mist is prevented from flying out, so that environmental pollution is prevented, and damage of the acid mist to equipment and personnel is avoided.

Description

Technical Field

[0001] The utility model relates to a sampling technology during the operation of a hydrochloric acid synthesis furnace, in particular to a sampling device for a hydrochloric acid synthesis furnace. Background Art

[0002] The hydrogen and chlorine sent from the upstream process, after impurities are removed and pressurized, enter the hydrogen chloride synthesis furnace in a certain ratio, and are burned by flame to generate hydrogen chloride. Hydrogen chloride and high-purity water come into contact with the synthesis furnace to produce hydrochloric acid. In the process of producing hydrochloric acid, due to the specific gravity of the synthesis furnace and the need to produce 0.2m³ of high-purity hydrochloric acid for sampling, the hydrochloric acid waste liquid generated at this stage is recovered into the industrial hydrochloric acid storage tank through the open recovery tank at the sampling port. 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 float out of the open recovery tank, which will not only pollute the surrounding environment but also cause harm to surrounding equipment and personnel. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the utility model proposes a hydrochloric acid synthesis furnace sampling device, which transforms the open recovery tank of the original hydrochloric acid synthesis furnace into a closed sampling system, thereby preventing the splashing of hydrochloric acid waste liquid and the emission of acid mist, thereby preventing environmental pollution and avoiding damage to equipment and personnel caused by acid mist.

[0004] The technical solution disclosed in the utility model is as follows: a hydrochloric acid synthesis furnace sampling device includes a synthesis furnace and a first sampling valve connected to the synthesis furnace, the first sampling valve is connected to a sampling cut-off valve through a first sampling pipe, the sampling cut-off valve is connected to a closed sampling device through a second sampling pipe, and a funnel liquid valve is installed at the upper end of the closed sampling device.

[0005] On the basis of the above scheme, as a preference, the first sampling pipeline is provided with a No. 1 tee, the branch pipeline of the No. 1 tee is connected to the second sampling valve, the liquid outlet of the second sampling valve is the daily sampling port, and the upper end of the funnel lower liquid valve is connected to the funnel.

[0006] On the basis of the above scheme, as a preference, the second sampling pipeline is provided with a No. 2 tee, which includes a vertical pipe and a horizontal pipe connected to the middle of the vertical pipe, the horizontal pipe is connected to the sampling shut-off valve, the upper end of the vertical pipe is connected to the closed sampling device through the first flange, the lower end of the vertical pipe is connected to the drain valve, and the drain valve is connected to the industrial hydrochloric acid storage tank.

[0007] On the basis of the above solution, preferably, the closed sampling device includes a measuring cylinder and a hydrometer placed in the measuring cylinder.

[0008] Based on the above solution, as a preference, the measuring cylinder is cylindrical, and has a second flange at the lower end of the measuring cylinder. A gasket is installed between the second flange and the first flange to prevent the hydrometer from falling into the vertical tube, and the center of the gasket has several through holes.

[0009] On the basis of the above solution, preferably, the upper end of the measuring cylinder has a third flange, and the third flange is connected to the funnel lower liquid valve.

[0010] Based on the above solution, preferably, the measuring tube is made of a transparent acrylic plate.

[0011] On the basis of the above solution, preferably, the first sampling valve and the second sampling valve are two valves connected in series.

[0012] Based on the above solution, preferably, all flange connections in the device are wrapped with protective covers.

[0013] Based on the above solution, preferably, the material of the protective cover is EPDM rubber.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The open recovery tank of the original hydrochloric acid synthesis furnace was transformed into a closed sampling system to prevent the splashing of hydrochloric acid waste liquid and the emission of acid mist, thereby eliminating environmental pollution and avoiding damage to equipment and personnel caused by acid mist.

[0016] The specific gravity sampling operation during the hydrochloric acid synthesis process is carried out using a closed sampling device. After the specific gravity measurement is completed, the water is directly refluxed into the industrial hydrochloric acid storage tank through the closed sampling device for external sale.

[0017] This process is simple to operate, has a high recycling rate, and is simple to control. It can completely prevent environmental pollution caused by hydrochloric acid waste liquid at the synthesis furnace and damage to equipment and personnel caused by acid mist drifting outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the coordination between the measuring tube and the No. 2 tee. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without inventive work.

[0021] like Figure 1-2 As shown, the sampling device for the hydrochloric acid synthesis furnace includes a synthesis furnace 1 and a first sampling valve 2 connected to the synthesis furnace. The first sampling valve is connected to a sampling shut-off valve 4 through a first sampling pipe 3. The sampling shut-off valve is connected to a closed sampling device 6 through a second sampling pipe 5. A funnel liquid valve 7 is installed at the upper end of the closed sampling device.

[0022] During the operation of the hydrochloric acid synthesis furnace, the synthesis furnace needs to be measured for specific gravity every hour. The sampling shut-off valve is in the normally open state. The first sampling valve and the funnel liquid valve are opened, and the drain valve 9 is closed. The hydrochloric acid in the synthesis furnace flows into the closed sampling device through the first sampling pipe and the second sampling pipe. After the hydrometer floats up, the first sampling valve is closed, the result on the hydrometer is read, the drain valve 9 is opened, and the funnel liquid valve is closed after the hydrochloric acid is drained.

[0023] In order to ensure that the specific gravity operation can be carried out continuously every hour, the second sampling pipeline is provided with a No. 2 tee 8, which includes a vertical pipe and a horizontal pipe connected to the middle of the vertical pipe. The horizontal pipe is connected to the sampling shut-off valve. The upper end of the vertical pipe is connected to the closed sampling device through the first flange. The lower end of the vertical pipe is connected to the drain valve 9, and the drain valve is connected to the industrial hydrochloric acid storage tank 10.

[0024] During use, the sampling shut-off valve is in the normally open state and the drain valve is in the normally closed state. When performing the specific gravity operation every hour, open the first sampling valve and the funnel liquid valve, close the drain valve 9, and the hydrochloric acid in the synthesis furnace flows into the closed sampling device through the first sampling pipe and the second sampling pipe. After the hydrometer floats up, close the first sampling valve, read the result on the hydrometer, open the drain valve 9, and discharge the hydrochloric acid in the closed sampling device into the industrial hydrochloric acid storage tank. Finally, close the funnel liquid valve.

[0025] During the operation of the hydrochloric acid synthesis furnace, sampling and quality inspection are required at regular intervals (any number of days, currently 7 days in our company, which can be changed according to demand). Therefore, a No. 1 tee 11 is provided on the first sampling pipeline, and a branch pipeline of the No. 1 tee is connected to a second sampling valve 12. The liquid outlet of the second sampling valve is a daily sampling port 13, and the upper end of the funnel lower liquid valve is connected to a funnel 14.

[0026] When in use, close the sampling shut-off valve, open the first sampling valve and the second sampling valve, place a glass sampling bottle at the daily sampling port for sampling, and send the glass sampling bottle for quality inspection after sampling. After the quality inspection is completed, open the funnel liquid valve and the drain valve, and pour the liquid in the glass sampling bottle into the closed sampling device through the funnel and then flow into the industrial hydrochloric acid storage tank.

[0027] To facilitate observation, the sealed sampling device consists of a measuring cylinder 61 and a hydrometer 62 placed within it. The measuring cylinder is cylindrical and made of transparent acrylic. A second flange 63 is located at the lower end of the measuring cylinder. A gasket 15 is installed between the second and first flanges to prevent the hydrometer from falling into the standpipe. The gasket has several through-holes 151 at its center. When the measuring cylinder is empty, the hydrometer rests on the gasket.

[0028] The upper end of the measuring cylinder is provided with a third flange, and the third flange is connected to the funnel lower liquid valve.

[0029] To ensure the stability of the system operation and prevent leakage, the first sampling valve and the second sampling valve are two valves connected in series. All flange connections in the device are wrapped with protective covers made of EPDM rubber.

[0030] The utility model transforms the open recovery tank of the original hydrochloric acid synthesis furnace into a closed sampling system, which prevents the splashing of hydrochloric acid waste liquid and the emission of acid mist, thereby preventing environmental pollution and avoiding damage to equipment and personnel caused by acid mist.

[0031] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention, and such improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A hydrochloric acid synthesis furnace sampling device, comprising a synthesis furnace and a first sampling valve connected to the synthesis furnace, characterized in that: The first sampling valve is connected to the sampling cut-off valve through a first sampling pipeline, the sampling cut-off valve is connected to the closed sampling device through a second sampling pipeline, and a funnel liquid valve is installed on the upper end of the closed sampling device.

2. The hydrochloric acid synthesis furnace sampling device according to claim 1, characterized in that: The first sampling pipeline is provided with a No. 1 tee, a branch pipeline of the No. 1 tee is connected to the second sampling valve, the liquid outlet of the second sampling valve is the daily sampling port, and the upper end of the funnel lower liquid valve is connected to the funnel.

3. The hydrochloric acid synthesis furnace sampling device according to claim 1, characterized in that: The second sampling pipeline is provided with a No. 2 tee, which includes a vertical pipe and a horizontal pipe connected to the middle of the vertical pipe. The horizontal pipe is connected to the sampling cut-off valve. The upper end of the vertical pipe is connected to the closed sampling device through the first flange. The lower end of the vertical pipe is connected to the drain valve, and the drain valve is connected to the industrial hydrochloric acid storage tank.

4. The hydrochloric acid synthesis furnace sampling device according to claim 1, characterized in that: The closed sampling device comprises a measuring cylinder and a hydrometer placed in the measuring cylinder.

5. The hydrochloric acid synthesis furnace sampling device according to claim 4, characterized in that: The measuring cylinder is cylindrical and has a second flange at its lower end. A gasket is installed between the second flange and the first flange to prevent the hydrometer from falling into the vertical tube. The center of the gasket has several through holes.

6. The hydrochloric acid synthesis furnace sampling device according to claim 5, characterized in that: The upper end of the measuring cylinder is provided with a third flange, and the third flange is connected to the funnel lower liquid valve.

7. The hydrochloric acid synthesis furnace sampling device according to claim 4, characterized in that: The measuring cylinder is made of transparent acrylic plate.

8. The hydrochloric acid synthesis furnace sampling device according to claim 1, characterized in that: The first sampling valve and the second sampling valve are both two valves connected in series.

9. The hydrochloric acid synthesis furnace sampling device according to claim 1, characterized in that: All flange connections in the device are covered with protective covers.

10. The hydrochloric acid synthesis furnace sampling device according to claim 1, characterized in that: The material of the protective cover is EPDM rubber.

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