A sulfuric acid concentration on-line detection sampling device

Abstract

The application discloses a kind of sulfuric acid concentration on-line detection sampling device, belong to sulfuric acid sampling technical field, the sulfuric acid concentration on-line detection sampling device includes sampling mechanism, the sampling head of the bottom end of sampling pipe is stretched into liquid inside, and liquid is extracted into the inside of sampling pipe by peristaltic pump, the impurities in the inside of liquid are filtered by the filter screen one and filter screen two that are arranged in the inside of sampling head, the filter screen one and filter screen two are installed in the inside of sampling head by the way of plug-in, can filter the impurities in the inside of liquid, and the liquid extracted in the inside of sampling pipe is heated by the electric heating wire arranged in the inside of sampling pipe, can conveniently sample operation to sulfuric acid, and can avoid the phenomenon that sulfuric acid low temperature crystallization causes sampling pipe blockage, simple and quick operation, convenient to use.

Description

Technical Field

[0001] This application relates to the field of sulfuric acid sampling technology, specifically an online sulfuric acid concentration detection and sampling device. Background Technology

[0002] Sulfuric acid is a strong inorganic acid that reacts with most metals. High concentrations of sulfuric acid are highly hygroscopic and can be used as a dehydrating agent, carbonizing carbohydrate-containing materials such as wood, paper, cotton and linen fabrics, and animal hides. It releases a large amount of heat when mixed with water. Due to its strong corrosive and oxidizing properties, it must be used with caution. Sulfuric acid is an important industrial raw material, often called the "mother of the chemical industry," and is used in the manufacture of fertilizers, pharmaceuticals, explosives, pigments, detergents, and batteries. It is also widely used in petroleum purification, metal smelting, and dye industries. It is commonly used as a chemical reagent and in organic synthesis, it serves as a dehydrating and sulfonating agent.

[0003] Current sulfuric acid concentration detection relies heavily on manual sampling followed by laboratory analysis. Sulfuric acid is sampled through a sampling tube and detected by online detection equipment. However, existing online detection equipment often fails due to acid crystallization clogging the pipeline and high-temperature corrosion of the sensor. The sulfuric acid crystallization temperature (≥40℃, the crystallization point of 98% sulfuric acid is -0.7℃; 92.5% concentration reaches -35℃) causes pipeline blockage under low-temperature conditions.

[0004] Therefore, this application provides an online sulfuric acid concentration detection and sampling device to solve the above problems. Utility Model Content

[0005] This application provides an online sulfuric acid concentration detection and sampling device, which aims to solve the problems mentioned in the background art, where existing sulfuric acid concentration detection mostly relies on manual sampling followed by laboratory analysis. Sulfuric acid is sampled through a sampling tube and detected by online detection equipment, and existing online detection equipment often fails due to acid crystallization clogging the pipeline and high temperature corrosion of the sensor.

[0006] To achieve the above objectives, this application provides the following technical solution: an online sulfuric acid concentration detection and sampling device, wherein the online sulfuric acid concentration detection and sampling device includes a sampling mechanism;

[0007] To address the current reliance on manual sampling followed by laboratory analysis for sulfuric acid concentration detection, a sampling mechanism is proposed. This mechanism involves sampling sulfuric acid through a sampling tube and then detecting it using online detection equipment. However, existing online detection equipment often fails due to acid crystallization clogging the pipes or high-temperature corrosion of the sensors. The proposed mechanism includes a sampling tube with an internally fixed heat-insulating tube and an internally fixed corrosion-resistant tube. Multiple sets of electric heating wires are installed inside the heat-insulating and corrosion-resistant tubes. Mounting flanges are fixedly connected to both ends of the sampling tube, and a sampling head is fixedly connected to the bottom of each flange. A first filter screen is installed inside the sampling head, and a second filter screen is installed on top of the first filter screen. A pneumatic diaphragm valve is fixedly connected to the top of the mounting flange of the sample tube. A peristaltic pump is installed on one side of the pneumatic diaphragm valve. The sampling head at the bottom of the sampling tube is inserted into the liquid, and the liquid is drawn into the sampling tube by the peristaltic pump. Impurities in the liquid are filtered by filter screens one and two installed inside the sampling head. Filter screens one and two are installed inside the sampling head by plugging in. The liquid drawn into the sampling tube is heated by an electric heating wire installed inside the sampling tube. This facilitates the sampling of sulfuric acid and avoids the clogging of the sampling tube caused by low-temperature crystallization of sulfuric acid. The operation is simple, quick and convenient.

[0008] Preferably, in order to solve the problem of avoiding crystallization, the multiple sets of electric heating wires are arranged in a ring array, and the axis of the electric heating wires is consistent with the axis of the sampling tube. The ring array arrangement of the electric heating wires can facilitate the heating of the liquid extracted from the sampling tube, avoid the phenomenon of liquid crystallization, and is convenient to use.

[0009] Preferably, to address the issue of ease of use of the sampling tube, the sampling tube is a 3-sampling-head L stainless steel sleeve, the heat insulation tube is made of ceramic fiber, and the corrosion-resistant tube is made of polytetrafluoroethylene. The operating range is -20℃ to 150℃, it resists corrosion from 98% concentrated sulfuric acid, and prevents metal ion contamination.

[0010] Preferably, in order to solve the problem of filtering liquid impurities, the sampling head is a Hastelloy coarse filter screen with a pore size of 2mm, and the second filter screen is a PTFE sintered filter element with a pore size of 0.5μm. The first filter screen can intercept large particles of impurities in the liquid, and the second filter screen can block microcrystals, making it convenient to use.

[0011] Preferably, to address the issue of ease of use, the peristaltic pump is provided with two sets of fixing clamps on its exterior. The two sets of fixing clamps are symmetrically fitted onto the exterior of the peristaltic pump, and each end of the two sets of fixing clamps is fixedly connected to a mounting block. The mounting block is fixedly secured with bolts. A connecting rod is fixedly connected to one side of one set of fixing clamps. By placing the fixing clamps on the exterior of the peristaltic pump and fixing the mounting block with bolts, the fixing clamps can be easily installed and fixed on the exterior of the peristaltic pump. The connecting rod on the side of the peristaltic pump allows for easy hand-holding or connection to the testing component, making it convenient to use.

[0012] Preferably, the sampling head has trapezoidal mounting grooves on both sides inside, the trapezoidal mounting grooves are adapted to the two ends of filter screen one and filter screen two, and filter screen one and filter screen two are inserted into the trapezoidal mounting grooves.

[0013] This sampling mechanism inserts a sampling head at the bottom of the sampling tube into the liquid. A peristaltic pump draws the liquid into the sampling tube. Filters one and two, installed inside the sampling head, filter impurities from the liquid. These filters are connected by an insert mechanism. An electric heating wire inside the sampling tube heats the extracted liquid, facilitating the sampling of sulfuric acid and preventing blockage caused by low-temperature crystallization. The operation is simple, quick, and convenient. Attached Figure Description

[0014] Figure 1 A three-dimensional structural schematic diagram of an online sulfuric acid concentration detection and sampling device;

[0015] Figure 2 A three-dimensional schematic diagram of an online sulfuric acid concentration detection and sampling device;

[0016] Figure 3 A three-dimensional schematic diagram of an online sulfuric acid concentration detection and sampling device.

[0017] Figure 4 A three-dimensional four-dimensional structural diagram of an online sulfuric acid concentration detection and sampling device;

[0018] Figure 5 A three-dimensional schematic diagram of a sulfuric acid concentration online detection and sampling device;

[0019] Figure 6 This is a three-dimensional six-dimensional structural diagram of an online sulfuric acid concentration detection and sampling device.

[0020] In the picture:

[0021] 1. Sampling mechanism; 11. Sampling tube; 12. Insulation tube; 13. Corrosion-resistant tube; 14. Electric heating wire; 15. Mounting flange; 16. Sampling head; 17. Filter screen one; 18. Filter screen two; 19. Trapezoidal mounting groove; 20. Pneumatic diaphragm valve; 21. Peristaltic pump; 22. Fixing clamp; 23. Mounting block; 24. Connecting rod. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] Example 1

[0024] This embodiment provides an online sulfuric acid concentration detection and sampling device, such as... Figure 1-6 As shown, the online sulfuric acid concentration detection and sampling device includes a sampling mechanism 1.

[0025] The sampling mechanism 1 allows for convenient sampling of sulfuric acid and avoids clogging of the sampling tube 11 caused by low-temperature crystallization of sulfuric acid. The operation is simple, quick, and easy to use.

[0026] The sampling mechanism 1 includes a sampling tube 11, an insulation tube 12 is fixedly connected inside the sampling tube 11, a corrosion-resistant tube 13 is fixedly connected inside the insulation tube 12, multiple sets of electric heating wires 14 are arranged inside the insulation tube 12 and the corrosion-resistant tube 13, mounting flanges 15 are fixedly connected to both ends of the sampling tube 11, a sampling head 16 is fixedly connected to the bottom end of the mounting flange 15, a filter screen 17 is arranged inside the sampling head 16, a filter screen 18 is arranged on the top of the filter screen 17, a pneumatic diaphragm valve 20 is fixedly connected to the top of the mounting flange 15 arranged on the top of the sampling tube 11, and a peristaltic pump 21 is arranged on one side of the pneumatic diaphragm valve 20.

[0027] In use, the sampling head 16 at the bottom of the sampling tube 11 is inserted into the liquid, and the liquid is drawn into the sampling tube 11 by the peristaltic pump 21. The impurities in the liquid are filtered by the filter screen 17 and filter screen 18 set inside the sampling head 16, and the liquid drawn into the sampling tube 11 is heated by the electric heating wire 14 set inside the sampling tube 11. This makes it convenient to sample sulfuric acid and avoids the phenomenon of clogging of the sampling tube 11 caused by low-temperature crystallization of sulfuric acid. The operation is simple, quick and convenient.

[0028] Furthermore, multiple sets of electric heating wires 14 are arranged in a ring array, and the axis of the electric heating wires 14 is consistent with the axis of the sampling tube 11. The ring array arrangement of the electric heating wires 14 can conveniently heat the liquid extracted inside the sampling tube 11, avoid the phenomenon of liquid crystallization, and is easy to use. The power configuration of the electric heating wires 14 is 3kW (220V AC), the ring array spacing is ≤20mm, and the temperature is controlled in real time by the controller at 15±2℃ to ensure that it is above the crystallization point.

[0029] Furthermore, the sampling tube 11 is made of 316L stainless steel with a pressure resistance of ≥1.6MPa, the heat insulation tube 12 is made of ceramic fiber to reduce liquid heat loss, and the corrosion-resistant tube 13 is made of polytetrafluoroethylene (PTFE) with a working range of -20℃ to the installation flange temperature. The PTFE corrosion resistance critical value can resist 98% concentrated sulfuric acid corrosion and prevent metal ion contamination.

[0030] Among them, filter screen 17 is a Hastelloy coarse filter screen with a pore size of 2mm, and filter screen 18 is a PTFE sintered filter element with a pore size of 0.5μm. Filter screen 17 can intercept large particles of impurities in the liquid, while filter screen 18 can block microcrystals, making it convenient to use.

[0031] Specifically, the peristaltic pump 21 is provided with two sets of fixing clamps 22 on its exterior. The two sets of fixing clamps 22 are symmetrically fitted on the exterior of the peristaltic pump 21, and both ends of the two sets of fixing clamps 22 are fixedly connected to mounting blocks 23. The mounting blocks 23 are fixed by bolts. A connecting rod 24 is fixedly connected to one side of one set of fixing clamps 22. The fixing clamps 22 are placed on the exterior of the peristaltic pump 21 and the mounting blocks 23 are fixed by bolts. This makes it easy to install and fix the fixing clamps 22 on the exterior of the peristaltic pump 21. The connecting rod 24 provided on the side of the peristaltic pump 21 makes it easy to hold or connect to the inspection component, making it convenient to use.

[0032] Furthermore, trapezoidal mounting grooves 19 are provided on both sides of the inside of the sampling head 16. The trapezoidal mounting grooves 19 are adapted to the two ends of filter screen 17 and filter screen 18. Filter screen 17 and filter screen 18 are inserted into the trapezoidal mounting grooves 19. Filter screen 17 and filter screen 18 are respectively inserted into the inside of the trapezoidal mounting grooves 19, which facilitates the installation and fixation of filter screen 17 and filter screen 18. The operation is simple and quick and convenient to use.

[0033] It should be noted that the pneumatic diaphragm valve 20 and the peristaltic pump 21 are existing devices, and their working principle, size and model are not related to the function of this application, so they will not be described in detail. The control method of this utility model is controlled by a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0034] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. An online sulfuric acid concentration detection and sampling device, characterized in that, The online sulfuric acid concentration detection and sampling device includes a sampling mechanism (1). The sampling mechanism (1) includes a sampling tube (11), an insulation tube (12) is fixedly connected inside the sampling tube (11), a corrosion-resistant tube (13) is fixedly connected inside the insulation tube (12), multiple sets of electric heating wires (14) are arranged inside the insulation tube (12) and the corrosion-resistant tube (13), mounting flanges (15) are fixedly connected to both ends of the sampling tube (11), a sampling head (16) is fixedly connected to the bottom end of the mounting flange (15), a filter screen (17) is arranged inside the sampling head (16), a filter screen (18) is arranged on the top of the filter screen (17), a pneumatic diaphragm valve (20) is fixedly connected to the top of the mounting flange (15) arranged on the top of the sampling tube (11), and a peristaltic pump (21) is arranged on one side of the pneumatic diaphragm valve (20).

2. The online sulfuric acid concentration detection and sampling device according to claim 1, characterized in that: Multiple sets of the electric heating wires (14) are arranged in a ring array, and the axial direction of the electric heating wires (14) is consistent with the axial direction of the sampling tube (11).

3. The online sulfuric acid concentration detection and sampling device according to claim 1, characterized in that: The sampling tube (11) is a 316L stainless steel sleeve, the heat insulation tube (12) is made of ceramic fiber, and the corrosion resistant tube (13) is made of polytetrafluoroethylene.

4. The online sulfuric acid concentration detection and sampling device according to claim 1, characterized in that: The first filter screen (17) is a Hastelloy coarse filter screen with a pore size of 2 mm. The second filter screen (18) is a PTFE sintered filter element with a pore size of 0.5 μm.

5. The online sulfuric acid concentration detection and sampling device according to claim 1, characterized in that: The peristaltic pump (21) is provided with two sets of fixing clamps (22) on its exterior. The two sets of fixing clamps (22) are symmetrically fitted on the exterior of the peristaltic pump (21), and both ends of the two sets of fixing clamps (22) are fixedly connected to mounting blocks (23). The mounting blocks (23) are fixed by bolts, and a connecting rod (24) is fixedly connected to one side of one set of fixing clamps (22).

6. The online sulfuric acid concentration detection and sampling device according to claim 1, characterized in that: The sampling head (16) has trapezoidal mounting grooves (19) on both sides inside. The trapezoidal mounting grooves (19) are adapted to the two ends of filter screen one (17) and filter screen two (18). Filter screen one (17) and filter screen two (18) are inserted into the trapezoidal mounting grooves (19).

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