Experimental device for simulating high-temperature corrosion of gas

Abstract

The utility model discloses an experimental device for gas high-temperature corrosion simulation, which comprises a gas distribution device, a heating and heat preservation device and a tail gas treatment device which are sequentially connected, a flow monitoring unit is arranged on the gas distribution device, a cooling device is arranged between the heating and heat preservation device and the tail gas treatment device, and a ventilation device is arranged on the tail gas treatment device. And warning units are arranged in the ventilation device and the air distribution device. The flow monitoring unit is arranged on the gas distribution device, so that the change condition of the gas conveying amount can be accurately mastered in real time, the most real working environment can be simulated, and the authenticity of the experiment is ensured; the warning units installed on the gas distribution device and the ventilation device can give an alarm when gas leakage occurs or emission does not reach the standard, on one hand, the personal safety of operators and the safety of equipment in the experiment process are ensured, and on the other hand, the possibility that pollutants are diffused to the outside is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of high-temperature corrosion experimental devices, and relates to an experimental device for simulating high-temperature corrosion of gases. Background Technology

[0002] Phosphorus chemical industry is one of the important economic pillar industries. In recent years, the production capacity of yellow phosphorus has reached 1.78 million tons. Yellow phosphorus tail gas is a by-product of the yellow phosphorus production process. Yellow phosphorus tail gas is rich in carbon monoxide, with a content as high as 80-90% (volume fraction), and contains 5%-7% H2. It is a high-quality gaseous fuel with a calorific value of 10750-12000 kJ / Nm3, belonging to medium-calorific-value coal gas. Yellow phosphorus tail gas also contains harmful corrosive impurities such as phosphine, hydrogen sulfide, arsenides, and fluorides, limiting its efficient utilization. Practice has shown that burning unpurified yellow phosphorus tail gas will cause severe corrosion to equipment during combustion, leading to corrosion perforation and breakdown within a short period, resulting in equipment failure and limiting its service life.

[0003] To address the aforementioned technical deficiencies, existing technology publication number CN201212875Y provides a high-temperature corrosion simulation test device for yellow phosphorus tail gas. This device, through the sequential connection of a medium conveying device, a heating and insulation device, a measurement and control device, and a tail gas treatment device, simulates the state of yellow phosphorus tail gas during the actual combustion process, providing assistance for the utilization of industrial tail gas resources and the corrosion of metal materials. However, after extensive research during actual operation, the inventors discovered the following shortcomings in this device during the test: First, it is impossible to accurately control the medium delivery volume, leading to deviations in the simulated state and raising concerns about the realism of the simulated environment; second, a gas alarm is not installed, compromising the safety and reliability of the experiment; and finally, the test type is limited, only conducting experiments with corrosive media. Utility Model Content

[0004] The purpose of this invention is to solve the problems in the prior art and provide an experimental device for simulating high-temperature corrosion of gases.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An experimental apparatus for simulating high-temperature corrosion of gases includes a gas distribution device, a heating and insulation device, and an exhaust gas treatment device connected in sequence. The gas distribution device is equipped with a flow monitoring unit, a cooling device is provided between the heating and insulation device and the exhaust gas treatment device, and a ventilation device is provided on the exhaust gas treatment device. Both the ventilation device and the gas distribution device are equipped with warning units.

[0007] Furthermore, the gas distribution device includes a gas cylinder cabinet containing multiple gas cylinders. Each gas cylinder has a gas pipeline at its opening, and the gas pipeline is equipped with an electronic valve and a flow monitoring unit. The outside of the gas cylinder cabinet is equipped with a controller and an alarm unit, and the controller is electrically connected to the electronic valve and the flow monitoring unit.

[0008] Furthermore, the controller includes an instrument control panel and a switch. The instrument control panel is electrically connected to the electronic valve and the flow monitoring unit, and the switch is electrically connected to the warning unit.

[0009] Furthermore, the gas cylinder cabinet is also equipped with air ducts, and a fan is installed inside the air ducts.

[0010] Furthermore, the flow monitoring unit is a flow meter.

[0011] Furthermore, the cooling device is a heat exchanger, which is fixedly connected to the heating device through a pipe and is used to cool the high-temperature gas flowing into the pipe.

[0012] Furthermore, the ventilation device includes two fume hoods, with warning units and adsorption boxes installed inside and on top of the two fume hoods, respectively.

[0013] Furthermore, the warning unit is a gas alarm.

[0014] Furthermore, gas alarms include phosphine gas alarms and hydrogen sulfide gas alarms.

[0015] Furthermore, the adsorption box is an activated carbon adsorption box.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By installing a flow monitoring unit on the gas distribution device, the changes in gas delivery volume can be accurately monitored in real time during the high-temperature corrosion simulation experiment, ensuring that the gas delivery volume meets the experimental requirements and making the simulation state closer to the real working environment. 2. The warning units installed on the gas distribution device and ventilation device can provide warnings when gas leakage occurs or gas emissions exceed the standard, ensuring the personal safety of operators and equipment during the experiment and preventing the possible spread of pollutants to the outside world. Finally, this experimental device can simulate corrosive gases and inert gases, offering a wide variety of experiments and high practical value.

[0018] 2. Each gas cylinder is equipped with an electronic valve and flow meter at its opening. This allows monitoring of whether the delivery volume of different types of gas meets the experimental requirements. If the delivery volume of a certain gas does not meet the experimental requirements, the electronic valve is adjusted using a controller to improve the realism of the simulation.

[0019] 3. During the experiment, the operator can use the instrument control panel to preset the mixing ratio of each gas and accurately control the total amount of each gas delivered.

[0020] 4. The installation of the activated carbon adsorption box can further enhance the removal of pollutants during the gas emission process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the operation process of the gas high-temperature corrosion simulation experimental device provided by this utility model.

[0023] The components include: 1. Gas cylinder cabinet; 2. Heating furnace; 3. Heat exchanger; 4. Tail gas absorption bottle; 5. Fume hood; 6. Gas alarm. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The present invention will now be described in further detail with reference to the accompanying drawings:

[0031] See Figure 1This embodiment discloses an experimental apparatus for simulating high-temperature corrosion of gases, comprising a gas distribution device, a heating and insulation device, and an exhaust gas treatment device connected in sequence. The gas distribution device is equipped with a flow monitoring unit, a cooling device is located between the heating and insulation device and the exhaust gas treatment device, and a ventilation device is installed on the exhaust gas treatment device. Both the ventilation device and the gas distribution device are equipped with warning units. By installing a flow monitoring unit on the gas distribution device, the changes in gas delivery volume can be accurately monitored in real time, simulating the most realistic working environment and ensuring the authenticity of the experiment. The warning units installed on the gas distribution device and the ventilation device can provide warnings in case of gas leakage or substandard emissions, ensuring the safety of operators and equipment during the experiment and preventing the possible spread of pollutants to the outside world. The heating and insulation device can simulate the real production environment under inert and corrosive gases, expanding the scope of experimental simulation and improving its practical value. Furthermore, the gas distribution device includes a gas cylinder cabinet 1, which houses multiple gas cylinders. Each cylinder has a gas pipeline at its opening, and the gas pipeline is equipped with an electronic valve and a flow monitoring unit. A controller and an alarm unit are located on the outside of the gas cylinder cabinet 1. The controller is electrically connected to the electronic valve and the flow monitoring unit. Specifically, the controller includes an instrument control panel and a switch. The instrument control panel is electrically connected to the electronic valve and the flow monitoring unit. Operators can set the required gas flow rate ratio on the instrument panel to precisely control the input of each gas, achieving accurate environmental simulation. Secondly, the switch is electrically connected to the alarm unit to control its opening or closing.

[0032] In this embodiment, the gas cylinder cabinet 1 is also equipped with an air duct, and a fan is installed inside the air duct to ventilate the gas cylinder cabinet. Stainless steel pipes transport various gases to the heating and insulation device. Furthermore, the heating and insulation device is a heating furnace 2, which is made of corrosion-resistant materials, preferably stainless steel. The heating furnace 2 uses PID control and self-tuning adjustment, and has over-temperature and thermocouple failure alarm functions. The maximum heating temperature can reach 1700℃.

[0033] In this embodiment, the flow monitoring unit is a flow meter; specifically, the flow meter is the Sevenstar D07 series D07-7K.

[0034] In this embodiment, the cooling device is a heat exchanger 3, which is fixedly connected to the heating furnace 2 through a pipe and is used to cool the high-temperature gas flowing into the pipe, thereby achieving the purpose of cooling.

[0035] In this embodiment, the ventilation device includes two ventilation cabinets 5. The interior and top of the two ventilation cabinets 5 are respectively equipped with warning units and adsorption boxes. Specifically, the warning units are gas alarms, including phosphine gas alarms and hydrogen sulfide gas alarms, which are installed in both the gas cylinder cabinet 1 and the ventilation cabinets 5. The adsorption boxes are activated carbon adsorption boxes. The gas in the ventilation cabinet is treated by the activated carbon adsorption box before being discharged into the atmosphere.

[0036] In this embodiment, the exhaust gas treatment device is an exhaust gas absorption bottle 4. There are four exhaust gas absorption bottles 4. Three of them contain aqueous solution, sodium hydroxide solution and copper sulfate solution respectively. When a large amount of black precipitate appears in the bottle, the absorption solution should be replaced in time. The other exhaust gas absorption bottle 4 does not contain any liquid and serves as an anti-backflow device to prevent the solution from flowing back during the cooling process and affecting the gas absorption effect. In specific operations, the stainless steel workpiece sample to be processed is first polished, rust-removed, and degreased, then dried, weighed, and numbered. The mixing ratio of each gas is set on the instrument control panel of the gas cylinder cabinet 1. The workpiece sample is placed in the heating furnace 2, and the mixed gas enters the heating furnace 2 through a stainless steel pipe. During the experiment, the corresponding temperature values ​​can be preset according to the expected experimental conditions, such as 500℃, 900℃, and 1100℃. During the heating process, when the temperature of the workpiece sample in the inert gas environment in the heating furnace 2 rises to the preset temperature value, the environment is switched to a corrosive gas environment. After the 24-hour reaction time is reached, it is switched back to an inert gas environment and cooled using a cooling device. After cooling to room temperature, the sample is taken out, weighed, and recorded. The above steps are repeated until the experiment is completed. The heating furnace 2 and fume hood 5 are then turned off, and the exhaust gas absorption solution is replaced in a timely manner.

[0037] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An experimental device for gas high-temperature corrosion simulation, comprising a gas distribution device, a heating and holding device and a tail gas treatment device connected in sequence, characterized in that, The gas distribution device is provided with a flow monitoring unit, the heating and heat preservation device and the tail gas treatment device are provided with a cooling device, the tail gas treatment device is provided with a ventilation device, and the ventilation device and the gas distribution device are provided with warning units.

2. The experimental setup of claim 1, wherein, The gas distribution device comprises a gas cylinder cabinet, a plurality of gas cylinders are arranged in the gas cylinder cabinet, a gas path pipeline is arranged at the bottle opening of each gas cylinder, and an electronic valve and a flow monitoring unit are arranged on the gas path pipeline. The gas cylinder cabinet is provided with a controller and a warning unit on the outer side, and the controller is electrically connected with the electronic valve and the flow monitoring unit.

3. The experimental set-up of claim 2, wherein, The controller comprises an instrument control panel and a switch, the instrument control panel is electrically connected with the electronic valve and the flow monitoring unit, and the switch is electrically connected with the warning unit.

4. The experimental setup of claim 2, wherein, The gas cylinder cabinet is further provided with an air pipe, and a fan is arranged in the air pipe.

5. The experimental setup according to any one of claims 1 to 3, characterized in that The flow monitoring unit is a flow meter.

6. The experimental setup of claim 1, wherein, The cooling device is a heat exchanger, the heat exchanger is fixedly connected with the heating device through a pipeline, and is used for cooling high-temperature gas flowing into the pipeline.

7. The experimental setup of claim 1, wherein, The ventilation device comprises two ventilation cabinets, and a warning unit and an adsorption box are respectively arranged in the inside and the top of the two ventilation cabinets.

8. The experimental setup of claim 1 or 2 or 7, wherein, The warning unit is a gas alarm.

9. The experimental setup of claim 8, wherein, The gas alarm comprises a phosphine gas alarm and a hydrogen sulfide gas alarm.

10. The experimental setup of claim 7, wherein, The adsorption box is an activated carbon adsorption box.

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