Metal coupon reaction system

Abstract

The invention belongs to the technical field of anti-corrosion treatment of boilers, and particularly discloses a metal coupon reaction system which comprises a reaction kettle, a water vapor generation part, a gas tank and a scrubber tank. The reaction kettle is provided with a reaction cavity, and a gas inlet and outlet part, a pressure detection part, a temperature measurement part and a control instrument panel are arranged on the reaction kettle; the vapor generating part is used for providing vapor for the reaction cavity; corrosive gas is stored in the gas tank, and the gas tank is used for providing the corrosive gas to the reaction cavity; an alkaline solution is stored in the scrubber tank and is used for treating toxic tail gas. According to the metal coupon reaction system provided by the invention, the metal coupon reaction kettle is matched with the water vapor generation part, the gas tank, the double-plunger pump and the scrubber tank, so that four important indexes, namely pressure, temperature, corrosion atmosphere and water vapor flow, are met in one set of system, and the working environment in a solid waste incinerator can be better simulated; the problem that the high-temperature and high-pressure corrosion wet atmosphere in the solid waste incinerator is difficult to simulate is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of boiler anti-corrosion treatment, and in particular relates to a metal hanging sheet reaction system. Background Art

[0002] In the field of boiler operation, solid waste incinerators pose a greater threat of high-temperature corrosion than pulverized coal furnaces. The reason is that the combustion products of solid waste contain more corrosion factors such as Cl, S, and alkali metal elements.

[0003] In the current field of boiler corrosion prevention and treatment technology, researchers often use tube furnaces to simply simulate boiler atmospheres, but these furnaces suffer from issues such as the inability to pressurize and introduce water vapor. These limitations of tube furnace experimental devices have hindered the development of high-temperature boiler corrosion control. Therefore, a reaction device that can better simulate the working environment inside solid waste incinerators is urgently needed to address the difficulties of accurate simulation experiments in solid waste incinerators and lay the foundation for further research in boiler corrosion prevention and treatment technologies. Summary of the Invention

[0004] In view of the above-mentioned problems, the purpose of the present invention is to provide a metal hanging sheet reaction system that can better simulate the working environment inside a solid waste incinerator.

[0005] The technical solution of the present invention is: a metal hanging sheet reaction system, comprising a reaction kettle, a water vapor generating part, a gas tank and a gas washing tank.

[0006] The reactor has a reaction chamber, and is provided with a gas inlet and outlet part, a pressure detection part, a temperature measuring part and a control instrument panel. The gas inlet and outlet part includes multiple gas valves, and each gas valve is connected to the reaction chamber; the pressure detection part includes: a pressure testing unit, which has a detection end, and the detection end is used to monitor the pressure inside the reaction chamber; a pressure feedback unit, which has an inlet end and an outlet end, and the inlet end is connected to the inside of the reaction chamber. When the pressure inside the reaction chamber exceeds a threshold, the outlet end is used to release the pressure medium; the temperature measuring part includes a heating unit and a temperature measuring unit, the heating unit is used to heat the inside of the reaction chamber, and the temperature measuring unit is used to monitor the temperature inside the reaction chamber; the control instrument panel is respectively connected to the pressure testing unit, pressure feedback unit, heating unit, temperature measuring unit and gas valve.

[0007] The water vapor generating part is connected to the reaction chamber through an air valve and is used to provide water vapor to the reaction chamber; the gas tank stores corrosive gas inside and is connected to the reaction chamber through an air valve and is used to provide corrosive gas to the reaction chamber; the gas washing tank stores alkaline solution inside and is connected to the reaction chamber through an air valve and is used to treat toxic exhaust gas; the gas washing tank, gas tank, and water vapor generating part correspond to multiple air valves one by one.

[0008] Furthermore, the corrosive gas is hydrogen chloride gas, or a mixed gas containing hydrogen chloride.

[0009] Furthermore, the gas washing tank is made of 316L or Hastelloy.

[0010] Furthermore, the reactor includes a reactor body and an anti-corrosion part. The reactor body is provided with a reactor cover. The anti-corrosion part includes an inner liner embedded in the inside of the reactor body and a sealing cover arranged on the inner side of the reactor cover. The sealing cover is arranged on the inner liner and forms the reaction chamber with the inner liner.

[0011] Furthermore, the lining is attached to the inner side of the kettle body, and the lining is made of ceramic material.

[0012] Furthermore, the cover is made of Hastelloy.

[0013] Furthermore, the reaction chamber is equipped with a sample suspension unit comprising multiple hooks evenly distributed within the reaction chamber, one end of each hook being secured to the cover. The hook design and material selection ensure that a sufficient number of samples can be held in a single experiment, significantly improving experimental efficiency and ensuring uniform corrosion of every surface of the sample metal, resulting in more representative experimental results.

[0014] Furthermore, it also includes a mounting bracket, on which a shell is provided. The shell is a cylindrical structure, and the kettle body is embedded in the cavity of the shell.

[0015] Furthermore, a lifting device is provided on the mounting bracket, and the lifting device is connected to the kettle cover for lifting the kettle cover.

[0016] Furthermore, the lifting device includes a traction rope, a pulley unit, and a winch. One end of the traction rope is connected to the kettle cover. The pulley unit is rotatably mounted on a mounting bracket and is used to guide the traction rope. The winch is fixed to the mounting bracket and connected to the end of the traction rope for winding or releasing the traction rope.

[0017] Compared with the existing technology, the beneficial effect of the present invention is that the metal hanging plate reaction system proposed in the present invention is based on a metal hanging plate reactor with a water vapor generating part, a gas tank, a double plunger pump and a gas washing tank. It meets four important indicators in one system, namely pressure, temperature, corrosive atmosphere, and water vapor flow. It can better simulate the working environment inside the solid waste incinerator, and solves the problem that the high temperature, high pressure, corrosive and humid atmosphere inside the solid waste incinerator is difficult to simulate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the metal coupon reaction system Figure 2 This is a schematic structural diagram of the metal coupon reactor of the present invention; Figure 3 is a top view of the cover of the present invention; Figure 4 It is a structural schematic diagram of the hook of the present invention.

[0019] Among them, 1-kettle body, 10-kettle cover, 2-anti-corrosion part, 21-lining, 22-sealing cover, 3-sample hanging part, 30-hook, 4-gas inlet and outlet part, 5-pressure detection part, 6-temperature measurement part, 7-mounting bracket, 70-shell, 71-traction rope, 72-pulley unit, 73-winch, 100-water vapor generating part, 101-gas tank, 102-double plunger pump, 103-gas washing tank. DETAILED DESCRIPTION

[0020] The following combination Figures 1 to 4 , the specific embodiments of the present invention are described in detail. In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed or operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0022] It should be noted that the circuit connections involved in the present invention all adopt conventional circuit connection methods and do not involve any innovation.

[0023] Example like Figure 1 The metal coupon reaction system shown includes a reactor, a steam generating unit 100 , a gas tank 101 , a double plunger pump 102 and a gas washing tank 103 .

[0024] like Figure 2As shown, the reaction kettle has a reaction cavity, and the reaction kettle is provided with a gas inlet and outlet portion 4, a pressure detection portion 5, a temperature measurement portion 6 and a control instrument panel. The gas inlet and outlet portion 4 includes a plurality of gas valves, each of which is in communication with the reaction cavity. The pressure detection portion 5 includes a pressure test unit and a pressure feedback unit. The pressure test unit is embedded on the kettle cover 10 and has a detection end which penetrates the kettle cover 10 and extends into the reaction cavity for monitoring the pressure inside the reaction cavity. The pressure feedback unit is provided on the kettle cover 10 and has an inlet end and an outlet end. The inlet end is in communication with the inside of the reaction cavity. When the pressure inside the reaction cavity exceeds a threshold value, the pressure medium is discharged through the outlet end. The pressure feedback unit is composed of a bursting disc holder or a safety valve assembly. When the pressure exceeds a specified pressure, the bursting disc or safety valve will automatically discharge the pressure medium. The safety bursting device used in this embodiment is a custom version of a bursting disc with a pressure resistance of 15 Mpa and a high temperature resistance of 500 DEG C.

[0025] The temperature measurement portion 6 includes a heating unit and a temperature measurement unit. The heating unit is used to heat the inside of the reaction cavity, and the temperature measurement unit is used to monitor the temperature inside the reaction cavity. The heating unit refers to a silicon carbide furnace core equipped outside the kettle body, with heating resistance wires connected thereto. The heating resistance wires are made of nickel-chromium wire Cr25Ni20, and therefore have the characteristics of uniform heating zone and fast heating. The temperature measurement unit is a temperature sensor, which is an imported K-type armored thermocouple temperature measurement instrument with a model of Kepson, a high temperature resistance of 1200 DEG C and a length of 300 mm. It is installed on the kettle cover 10. In operation, the temperature sensor transmits signals to the control instrument. When the temperature deviates from the set temperature, the heating power is adjusted by the on-off type or phase adjustment type adjustment of the PID law. It should be noted that the specific model of the temperature sensor can also be adjusted according to the actual temperature requirement.

[0026] The control instrument panel is connected with the pressure test unit, the pressure feedback unit, the heating unit, the temperature measurement unit and the gas valve respectively. The control instrument panel is provided with a main power switch, a temperature control meter, a heating voltage meter, a pressure control meter and a working time meter. In addition, the control instrument is provided with a power supply main fuse, a heating fuse and a pressure fuse. The temperature control meter used in this embodiment is a Delixi intelligent digital temperature control meter. The pressure control meter is an Yijia intelligent precision digital pressure meter with a 60 mm dial and a pressure range of 0 Mpa-16 Mpa and an accuracy of 1%.

[0027] The water vapor generating part 100 is connected to the reaction chamber through an air valve and is used to provide water vapor to the reaction chamber; the gas tank 101 stores corrosive gas inside and is connected to the reaction chamber through an air valve and is used to provide corrosive gas to the reaction chamber; the double-plunger pump 102 is connected to the water vapor generating part 100 and is used to introduce liquid into the water vapor generating part 100; the washing tank 103 stores alkaline solution inside and is connected to the reaction chamber through an air valve and is used to treat toxic exhaust gas; the washing tank 103, the gas tank 101, and the water vapor generating part 100 correspond to multiple air valves one by one.

[0028] Preferably, the corrosive gas is hydrogen chloride gas, or a mixed gas containing hydrogen chloride, such as a mixed gas of hydrogen chloride and any one of sulfur dioxide and hydrogen sulfide.

[0029] Preferably, the scrubber tank 103 is made of 316L or Hastelloy, and the volume of the scrubber tank in this embodiment is 65L.

[0030] Preferably, Figure 2 As shown, the reactor includes a reactor body 1 and an anti-corrosion section 2. The reactor body 1 is provided with a lid 10. In this embodiment, the reactor body 1 has a diameter of 290 mm, a height of 333 mm, and a wall thickness of 8 mm. The lid 10 has a diameter of 386 mm. A flange is welded to the upper end of the reactor body 1, and the lid 10 is connected to the flange. The anti-corrosion section 2 includes an inner liner 21 embedded within the reactor body 1 and a cover 22 disposed inside the lid 10. Both the inner liner 21 and the cover 22 are made of anti-corrosion materials. The cover 22 is mounted on the inner liner 21, forming a reaction chamber together with the inner liner 21.

[0031] Preferably, the lining 21 is attached to the inner side of the kettle body 1 and is made of ceramic material.

[0032] Preferably, the cover 22 is made of Hastelloy.

[0033] Preferably, Figure 2 、 Figure 3 As shown, a sample hanging portion 3 is provided in the reaction chamber. The sample hanging portion 3 includes a plurality of hooks 30, which are evenly distributed in the reaction chamber. One end of the hook 30 is fixed to the cover 22. The hook design allows the sample capacity of a single group of experiments to reach a sufficient number, greatly improving the experimental efficiency and ensuring that each surface of the sample metal is uniformly corroded, making the experimental results more representative. In this embodiment, the hooks 30 are vertically welded to the cover 22. The longitudinal and transverse spacing of the hooks 30 is 26 mm. Figure 4 As shown, the hook has a length of 88 mm and a diameter of 3 mm.

[0034] Preferably, the kettle further comprises a mounting bracket 7 , on which a shell 70 is provided. The shell 70 is a cylindrical structure, and the kettle body 1 is embedded in the cavity of the shell 70 .

[0035] Preferably, a lifting device is provided on the mounting bracket 7 , and the lifting device is connected to the kettle cover 10 for lifting the kettle cover 10 .

[0036] Preferably, the lifting device includes a traction rope 71, a pulley unit 72, and a hoist 73. One end of the traction rope 71 is connected to the kettle cover 10. The pulley unit 72 is rotatably mounted on the mounting bracket 7 and is used to guide the traction rope 71. The hoist 73 is fixed to the mounting bracket 7 and is connected to the end of the traction rope 71 for winding or releasing the traction rope 71.

[0037] The working method of the above embodiment is: The specimen size is 20mm*20mm*3mm, with a 5mm diameter hole drilled in the upper middle of the specimen. Five identical specimens are prepared for the weight gain test.

[0038] The samples are hung on the hooks 30 one by one, and different samples are hung on the multiple hooks 30.

[0039] The corrosive gas stored in the gas tank 101 is a mixture of hydrogen chloride and nitrogen.

[0040] The corrosion test was carried out on the samples under the conditions of temperature setting at 230°C, corrosive gas flow rate at 100 mL / min, and water vapor flow rate at 1 mL / min. The corrosion time was 1500 hours. The samples were taken out every 240 hours, weighed, and not put into the reactor again. A total of 5 batches were tested, and the removal time of the last batch was adjusted to 1500 hours.

[0041] The specific models of the above electronic components are not particularly specified, and common products available on the market can be selected as long as they can meet the use requirements of the present invention.

[0042] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A metal coupon reaction system, characterized in that: include: The reactor has a reaction chamber, and is provided with a gas inlet and outlet portion (4), a pressure detection portion (5), a temperature measurement portion (6), and a control panel. The gas inlet and outlet portion (4) includes a plurality of gas valves, each gas valve being connected to the reaction chamber; the pressure detection portion (5) includes: a pressure test unit having a detection end, the detection end being used to monitor the pressure inside the reaction chamber; The pressure feedback unit has an inlet end and an outlet end, the inlet end is connected to the interior of the reaction chamber, and the outlet end is used to release the pressure medium when the pressure inside the reaction chamber exceeds a threshold value; the temperature measuring unit (6) includes a heating unit and a temperature measuring unit, the heating unit is used to heat the interior of the reaction chamber, and the temperature measuring unit is used to monitor the temperature inside the reaction chamber; the control instrument panel is respectively connected to the pressure test unit, the pressure feedback unit, the heating unit, the temperature measuring unit and the gas valve; A water vapor generating portion (100) is connected to the reaction chamber via a gas valve and is used to provide water vapor to the reaction chamber; A gas tank (101) stores corrosive gas therein and is connected to the reaction chamber via a gas valve, for supplying the corrosive gas to the reaction chamber; The gas washing tank (103) stores alkaline solution therein and is connected to the reaction chamber via a gas valve for treating toxic tail gas; the gas washing tank (103), the gas tank (101), the water vapor generating part (100) and the plurality of gas valves correspond one to one.

2. A metal coupon reaction system according to claim 1, characterized in that: The corrosive gas is hydrogen chloride gas, or a mixed gas containing hydrogen chloride.

3. A metal coupon reaction system according to claim 1, characterized in that: The gas washing tank (103) is made of 316L or Hastelloy.

4. A metal coupon reaction system according to claim 1, characterized in that: The reactor comprises: A kettle body (1) is provided with a kettle cover (10); The anti-corrosion part (2) comprises an inner lining (21) embedded in the interior of the kettle body (1), and a cover (22) arranged on the inner side of the kettle cover (10); the cover (22) is covered on the inner lining (21) and forms the reaction chamber with the inner lining (21).

5. A metal coupon reaction system according to claim 4, characterized in that: The inner lining (21) is attached to the inner side of the kettle body (1), and the inner lining (21) is made of ceramic material.

6. A metal coupon reaction system according to claim 4, characterized in that: The sealing cover (22) is made of Hastelloy.

7. The metal coupon reaction system according to claim 4, characterized in that: A sample hanging portion (3) is provided in the reaction chamber. The sample hanging portion (3) includes a plurality of hooks (30). The plurality of hooks (30) are evenly distributed in the reaction chamber, and one end of the hook (30) is fixed on the cover (22).

8. The metal coupon reaction system according to claim 4, characterized in that: It also includes a mounting bracket (7), a shell (70) is provided on the mounting bracket (7), the shell (70) is a cylindrical structure, and the kettle body (1) is embedded in the cavity of the shell (70).

9. The metal coupon reaction system according to claim 8, characterized in that: A lifting device is provided on the mounting bracket (7), and the lifting device is connected to the kettle cover (10) for lifting the kettle cover (10).

10. The metal coupon reaction system according to claim 9, characterized in that: The lifting equipment includes: A traction rope (71), one end of which is connected to the kettle cover (10); A pulley unit (72) is rotatably mounted on the mounting bracket (7) and is used to guide the traction rope (71); The hoist (73) is fixed on the mounting bracket (7) and connected to the end of the traction rope (71) for winding or releasing the traction rope (71).

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