Sulfuric acid concentration automatic detection device

Abstract

The utility model provides an automatic sulfuric acid concentration detection device which is characterized in that a liquid inlet pipe is arranged on one side of a shell, a sampling valve is arranged at the upper end of the liquid inlet pipe, a cavity with a closed structure is arranged at the upper half position of one side in the shell, and a first sulfuric acid concentration meter and a second sulfuric acid concentration meter are arranged in the cavity; the detection ends of the first sulfuric acid concentration meter and the second sulfuric acid concentration meter extend into the shell and are close to the bottom of the shell, a liquid level sensor is further arranged between the first sulfuric acid concentration meter and the second sulfuric acid concentration meter, the detection end of the liquid level sensor penetrates through the cavity to face the interior of the shell, and a liquid outlet is further formed in one side of the bottom of the shell. And an acid discharge pump is arranged on the liquid discharge port. According to the automatic detection device, the working environment is improved, the operation safety and convenience are improved, and meanwhile the requirement for safety management is met.

Description

Technical Field

[0001] The utility model relates to the field of sulfuric acid concentration detection, in particular to an automatic sulfuric acid concentration detection device. Background Art

[0002] Sulfuric acid plants require accurate sulfuric acid concentration during production. Because sulfuric acid concentration is crucial to plant safety and product quality, each plant is designed to manually sample and analyze sulfuric acid concentration to ensure accurate concentration. Currently, this manual sulfuric acid sampling is conducted from the acid pipeline through a 16mm stainless steel tube to the top of the circulation tank, where it flows into a sampling bucket. Excess sulfuric acid then flows into the circulation tank through a hole in the bottom of the sampling bucket. Since the liquid level in the circulation tank fluctuates during operation, pressure fluctuations within the tank occur.

[0003] When the liquid level in the circulation tank fluctuates upward, positive pressure builds up inside. Since the bottom pipe of the sampling bucket is connected to the circulation tank, the pressure inside the circulation tank is released into the sampling bucket. Since the sampling bucket is constantly flowing with sampled sulfuric acid, the rising pressure in the tank will blow the sampled sulfuric acid out, creating acid mist and foam in the sampling bucket that pollutes the environment or poses a safety hazard to the sampling personnel. Therefore, it is imperative to address the current issues with sulfuric acid sampling buckets. We are now applying for an automatic sulfuric acid concentration detection device. Utility Model Content

[0004] The main purpose of the utility model is to provide an automatic detection device for sulfuric acid concentration, which solves the problems of acid mist and acid foam in a sampling barrel polluting the environment or sulfuric acid injuring the safety of sampling personnel.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: an automatic sulfuric acid concentration detection device, a liquid inlet pipe is provided on one side of the shell, a sampling valve is provided on the upper end of the liquid inlet pipe, a closed structure cavity is provided in the upper half of one side of the interior of the shell, a first sulfuric acid concentration meter and a second sulfuric acid concentration meter are provided inside the cavity, the detection ends of the first sulfuric acid concentration meter and the second sulfuric acid concentration meter extend into the interior of the shell and the ends are close to the bottom of the shell, a liquid level sensor is also provided between the first sulfuric acid concentration meter and the second sulfuric acid concentration meter, the detection end of the liquid level sensor passes through the cavity toward the interior of the shell, a drain port is also provided on one side of the bottom of the shell, and an acid discharge pump is provided on the drain port.

[0006] In a preferred embodiment, a controller is further provided on the housing, and the controller is electrically connected to the first sulfuric acid concentration meter, the second sulfuric acid concentration meter, the liquid level sensor, the sampling valve and the acid discharge pump, and the controller is electrically connected to the display screen.

[0007] In a preferred embodiment, an inspection door is provided above the detection cavity on one side of the shell.

[0008] In a preferred embodiment, the lower end of the liquid inlet pipe extends into the interior of the shell, and a baffle is provided on one side of the liquid inlet pipe, with the lower end of the baffle close to the bottom of the shell.

[0009] In a preferred embodiment, a protective cover is further provided on one side of the exterior of the shell, and the protective cover covers the exterior of the acid discharge pump.

[0010] In a preferred embodiment, the shell is made of 316L stainless steel or 17-4PH stainless steel.

[0011] The utility model provides an automatic detection device for sulfuric acid concentration. Environmental protection: The closed and safe sampling design avoids the generation of acid mist and acid foam, reducing pollution to the surrounding environment. No sulfuric acid overflows into the environment during non-sampling time, reducing the risk of environmental pollution. Improved safety: The device adopts a closed structure to effectively prevent the leakage of concentrated sulfuric acid, thereby improving the operational safety of sampling personnel. The sampling process is simple and safe throughout, significantly reducing the risk of sulfuric acid splashing and injuring sampling personnel. It complies with the requirements of the public security department for the management of drug-making raw materials and strengthens safety management measures. Convenience of operation: The automated detection function simplifies the sampling process and reduces the workload of operators. Real-time monitoring of sulfuric acid concentration is achieved, ensuring the safety of device operation and quality control of products.

[0012] In summary, the automatic detection device not only improves the working environment, but also enhances the safety and convenience of operation, while also meeting the needs of safety management. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0014] Figure 1 It is the internal structure diagram of the detection device of the utility model.

[0015] In the figure: housing 1; sampling valve 2; liquid level sensor 3; first sulfuric acid concentration meter 4; second sulfuric acid concentration meter 5; controller 6; acid discharge pump 7; display screen 8; protective cover 9; discharge port 10; inspection door 11; docking port 12; baffle 13; liquid inlet pipe 14. DETAILED DESCRIPTION

[0016] like Figure 1As shown, an automatic detection device for sulfuric acid concentration is provided. A liquid inlet pipe 14 is provided on one side of the shell 1, and a sampling valve 2 is provided on the upper end of the liquid inlet pipe 14. A closed cavity is provided in the upper half of one side of the interior of the shell 1. A first sulfuric acid concentration meter 4 and a second sulfuric acid concentration meter 5 are provided inside the cavity. The detection ends of the first sulfuric acid concentration meter 4 and the second sulfuric acid concentration meter 5 extend into the interior of the shell 1 and the ends are close to the bottom of the shell 1. A liquid level sensor 3 is also provided between the first sulfuric acid concentration meter 4 and the second sulfuric acid concentration meter 5. The detection end of the liquid level sensor 3 passes through the cavity toward the interior of the shell 1. A drain port 10 is also provided on one side of the bottom of the shell 1, and an acid discharge pump 7 is provided on the drain port 10.

[0017] The automatic detection device for sulfuric acid concentration forms a sulfuric acid static pressure seal in the sampling barrel. The pressure generated in the circulation tank is sealed by the static pressure of about 9Kpa generated by sulfuric acid at a height of 250mm, so that the acid gas in the circulation tank will not flow out from the sampling position.

[0018] The working principle is: the sampled sulfuric acid flows into the housing 1 of the automatic sulfuric acid concentration detection device through the sampling valve 2. In order to prevent liquid splashing, a baffle 13 is provided inside the sampler. The liquid level sensor 3 starts recording. When the liquid level exceeds 10 mm, the PLC controller 6 controls the sampling valve 2 to close. After 1 minute, the acid discharge pump 7 starts to discharge liquid, and the indicator light is always green.

[0019] The sulfuric acid concentration detector starts to read. If the detected values ​​differ by more than 0.5%, the display screen 8 will display the values ​​of sulfuric acid concentration meters 1 and 2 and the average value respectively, and the indicator light will turn yellow, indicating that the sulfuric acid concentration detector may be reading inaccurate and needs to be corrected.

[0020] If the difference between the test values ​​is less than 0.5%, the display will show the value. When the average value is lower than 98%, the display indicator will turn red, indicating that the sulfuric acid concentration is unqualified. When the average value is higher than 98%, the display indicator will turn green, indicating that the sulfuric acid concentration is qualified.

[0021] After completion, the sulfuric acid flows into the circulation tank through the acid discharge pump, thereby sending the acid gas in the circulation tank to the sealing group to achieve closed sampling of sulfuric acid. When the liquid level drops to 0, the acid discharge pump is turned off.

[0022] In the preferred embodiment, a controller 6 is further provided on the housing 1 , and the controller 6 is electrically connected to the first sulfuric acid concentration meter 4 , the second sulfuric acid concentration meter 5 , the liquid level sensor 3 , the sampling valve 2 and the acid discharge pump 7 , and the controller 6 is electrically connected to the display screen 8 .

[0023] The functions of controller 6 are:

[0024] Control the sampling process: Control the switch of the sampling valve 2 to control the flow of sulfuric acid into the housing 1. When the liquid level sensor 3 detects that the liquid level exceeds 10 mm, the controller 6 will close the sampling valve 2 to stop the flow of sulfuric acid.

[0025] Monitor liquid level changes: Liquid level sensor 3 monitors changes in the sulfuric acid level inside housing 1. Start acid discharge pump 7: One minute after sampling, controller 6 starts acid discharge pump 7 to discharge sulfuric acid into the circulation tank. Control the shutdown of acid discharge pump 7: When the liquid level drops to 0, controller 6 shuts off acid discharge pump 7.

[0026] Sulfuric acid concentration detection and display: Control the first sulfuric acid concentration meter 4 and the second sulfuric acid concentration meter 5 to perform concentration detection.

[0027] If the detection results of the two concentration meters differ by more than 0.5%, the controller 6 will cause the display screen 8 to display the values ​​of the two concentration meters and the average value, and turn the indicator light yellow to indicate that calibration is required.

[0028] If the difference between the detection results of the two concentration meters does not exceed 0.5%, the controller 6 will cause the display screen 8 to display the average value.

[0029] If the average value is lower than 98%, the indicator light on the display turns red, indicating that the sulfuric acid concentration is unqualified.

[0030] If the average value is higher than 98%, the display indicator turns green, indicating that the sulfuric acid concentration is qualified.

[0031] In the preferred embodiment, an inspection door 11 is provided above the detection chamber on one side of the housing 1. After the inspection door 11 is opened, the controller 6, the first sulfuric acid concentration meter 4, the second sulfuric acid concentration meter 5 and the liquid level sensor 3 can be repaired and installed.

[0032] In the preferred embodiment, the lower end of the liquid inlet pipe 14 extends into the interior of the housing 1. A baffle 13 is provided on one side of the liquid inlet pipe 14, with its lower end near the bottom of the housing 1. The design of baffle 13 effectively reduces the impact of sulfuric acid entering the housing 1, thereby preventing sulfuric acid droplets from splashing. Baffle 13 helps guide the sulfuric acid to flow smoothly toward the bottom of the housing 1, ensuring even distribution and facilitating subsequent concentration testing.

[0033] By slowing down the flow rate of sulfuric acid, the baffle 13 helps maintain the stability of the liquid level inside the shell 1, which is crucial for accurate measurement of the liquid level and concentration.

[0034] In a preferred embodiment, a protective cover 9 is further provided on one side of the exterior of the housing 1 , and the protective cover 9 covers the exterior of the acid discharge pump 7 . The protective cover 9 is used to protect the acid discharge pump 7 .

[0035] In a preferred embodiment, the material of the housing 1 is 316L stainless steel or 17-4PH stainless steel. Both 316L stainless steel and 17-4PH stainless steel have good corrosion resistance. The stainless steel material is selected according to the usage.

[0036] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An automatic detection device for sulfuric acid concentration, characterized in that: A liquid inlet pipe (14) is provided on one side of the shell (1), and a sampling valve (2) is provided on the upper end of the liquid inlet pipe (14). A closed cavity is provided at the upper half of one side of the interior of the shell (1), and a first sulfuric acid concentration meter (4) and a second sulfuric acid concentration meter (5) are provided inside the cavity. The detection ends of the first sulfuric acid concentration meter (4) and the second sulfuric acid concentration meter (5) extend into the interior of the shell (1) and the ends are close to the bottom of the shell (1). A liquid level sensor (3) is also provided between the first sulfuric acid concentration meter (4) and the second sulfuric acid concentration meter (5), and the detection end of the liquid level sensor (3) passes through the cavity toward the interior of the shell (1). A liquid discharge port (10) is also provided on one side of the bottom of the shell (1), and an acid discharge pump (7) is provided on the liquid discharge port (10).

2. The automatic detection device for sulfuric acid concentration according to claim 1, wherein: The housing (1) is further provided with a controller (6), the controller (6) being electrically connected to the first sulfuric acid concentration meter (4), the second sulfuric acid concentration meter (5), the liquid level sensor (3), the sampling valve (2) and the acid discharge pump (7), and the controller (6) being electrically connected to the display screen (8).

3. The automatic detection device for sulfuric acid concentration according to claim 1, wherein: An inspection door (11) is also provided above the detection cavity on one side of the housing (1).

4. The automatic detection device for sulfuric acid concentration according to claim 1, wherein: The lower end of the liquid inlet pipe (14) extends into the interior of the housing (1), and a baffle (13) is provided on one side of the liquid inlet pipe (14), with the lower end of the baffle (13) close to the bottom of the housing (1).

5. The automatic detection device for sulfuric acid concentration according to claim 1, wherein: A protective cover (9) is further provided on one side of the exterior of the housing (1), and the protective cover (9) covers the exterior of the acid discharge pump (7).

6. The automatic detection device for sulfuric acid concentration according to claim 1, wherein: The material of the housing (1) is 316L stainless steel or 17-4PH stainless steel.

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