Adsorption and desorption device for detecting desulfurization value of activated carbon

Abstract

The utility model discloses an adsorption and desorption device for activated carbon desulfurization value detection, which relates to the technical field of activated carbon desulfurization and comprises a mixed gas tank, a gas pipeline is arranged on the mixed gas tank and spirally surrounds the outer wall of a preheater, a gas outlet of the gas pipeline is communicated with an inner cavity of the preheater, and a gas outlet of the gas pipeline is communicated with the inner cavity of the preheater. An activated carbon bent frame is detachably connected into an inner cavity of the preheater, and an exhaust port is formed in the upper end of the preheater. The bottom of the mixed gas tank is connected with an alkaline solution tank through a liquid discharge pipe; and a check valve is arranged on the gas pipeline. According to the utility model, pipeline blockage caused by backflow of redundant gas entrained with dust along a gas pipeline after a test is finished can be prevented; the alkaline solution tank can neutralize corrosive acid liquid, so that the service life of the mixed gas tank is prolonged; and the detachable activated carbon bent frame is convenient for cleaning the interior of the preheater, and is beneficial to increasing the contact area between the activated carbon and the mixed gas, so that the reaction is more sufficient.

Description

Technical Field

[0001] The utility model relates to the technical field of activated carbon desulfurization, in particular to an adsorption and desorption device for detecting the desulfurization value of activated carbon. Background Art

[0002] Coal-based activated carbon is refined and processed using advanced technology. High-quality anthracite is used as raw material to make black cylindrical particles. It has developed pore structure and good adsorption performance, high mechanical strength, easy to regenerate repeatedly, and low cost. It can effectively adsorb toxic gases and purify waste gas. In the detection process of activated carbon, how to accurately and efficiently detect the desulfurization value of activated carbon and extend the service life of the detection device to reduce the detection cost is particularly important.

[0003] The activated carbon desulfurization detection device is mainly composed of a gas source, a mixed gas tank, a mixed gas output pipeline, a feed inlet, a preheater, etc.

[0004] Test principle: Weigh a fixed volume of the pre-treated and dried activated carbon sample and put it into the measuring tube for airtightness inspection. After the airtightness inspection is qualified, connect the various components of the experimental device, and introduce sulfur dioxide, water vapor, oxygen and mixed gas with adjusted flow rates for adsorption. When sulfur dioxide is saturated with adsorption, it is desorbed by nitrogen, and the desulfurization value of the activated carbon is calculated based on the amount of sulfur dioxide desorbed.

[0005] Although the desulfurization detection device uses special stainless steel materials, sulfur dioxide is a strong oxidant. When mixed with water vapor, oxygen and other gases, it will be highly corrosive. The passivation film on the surface of the stainless steel will be gradually destroyed, leading to corrosion. After the detection is completed, the activated carbon will emit a small amount of dust at high temperature, which will flow back into the pipe, causing multiple pipe blockages and serious corrosion. Maintenance frequency increases and disassembly is difficult, resulting in poor use effect. Activated carbon directly loaded into the preheater is easily contaminated with impurities and needs to be cleaned regularly. Utility Model Content

[0006] The purpose of the utility model is to provide an adsorption and desorption device for detecting the desulfurization value of activated carbon, so as to solve the problems mentioned in the background technology that the liquid generated by the gas mixture in the desulfurization detection device will corrode the gas tank, the excess gas after the detection is completed will carry dust backflow and cause pipeline blockage, and the activated carbon directly loaded into the preheater is easy to be contaminated with impurities.

[0007] The utility model adopts the following technical solutions:

[0008] The utility model relates to an adsorption and desorption device for detecting the desulfurization value of activated carbon, which comprises a mixed gas tank. A gas pipeline is arranged on the mixed gas tank. The gas pipeline spirally surrounds the outer wall of a preheater. The outlet of the gas pipeline is communicated with the inner cavity of the preheater. An activated carbon rack is detachably connected in the inner cavity of the preheater. An exhaust port is arranged at the upper end of the preheater. The bottom of the mixed gas tank is connected with an alkaline solution tank through a drain pipe. A check valve is arranged on the gas pipeline.

[0009] Furthermore, a cavity is arranged inside the preheater. The activated carbon rack is arranged in the cavity. A docking port is arranged at the lower part of the preheater. The outlet of the gas pipeline is hermetically connected with the docking port.

[0010] Furthermore, a heat preservation tank is arranged on the outer wall of the preheater.

[0011] Furthermore, an opening is arranged at the top end of the preheater. The opening is hermetically and detachably connected with the activated carbon rack. A discharge valve is arranged at the bottom end of the preheater.

[0012] Furthermore, the activated carbon rack comprises an activated carbon plate cabin. The activated carbon plate cabin is a spirally cavity plate-like structure. The outer wall of the activated carbon plate cabin is a fine mesh-like structure. A buckle cover is arranged at the upper part of the activated carbon rack. The buckle cover is hermetically buckled and matched with the opening at the top end of the preheater. The activated carbon plate cabin is provided with a feed pipe. The feed pipe is communicated with the whole inner cavity of the activated carbon plate cabin. The feed port of the feed pipe is arranged above the buckle cover.

[0013] Furthermore, a handle end is arranged at the top end of the activated carbon rack.

[0014] Furthermore, a column body is arranged in the middle of the buckle cover. The activated carbon plate cabin spirally surrounds the column body.

[0015] Furthermore, the mixed gas tank is provided with an oxygen inlet pipe, a nitrogen inlet pipe, a sulfur dioxide inlet pipe and a water vapor inlet pipe.

[0016] Still further, a valve is arranged on the drain pipe.

[0017] Compared with the prior art, the beneficial technical effects of the utility model are:

[0018] In the utility model, a check valve is added to the gas pipeline, which can prevent the excess gas from carrying dust and flowing back along the gas pipeline into the mixing gas tank under the action of high temperature after the test, thus avoiding pipeline blockage; an alkaline solution tank is arranged under the mixing gas tank to neutralize the corrosive acidic liquid, avoiding the deposition of a large amount of corrosive liquid, and thus prolonging the service life of the mixing gas tank; a detachable activated carbon rack is arranged in the preheater, which facilitates the cleaning of the preheater and helps to increase the contact area between the activated carbon and the mixed gas, making the reaction more complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present utility model will be further described below in conjunction with the drawings.

[0020] Figure 1 FIG. is a schematic structural diagram of the adsorption and desorption device for detecting the desulfurization value of activated carbon of the present utility model;

[0021] Figure 2 FIG. is a schematic structural diagram of the mixing gas tank and the preheater in the adsorption and desorption device for detecting the desulfurization value of activated carbon of the present utility model;

[0022] Figure 3 FIG. is a schematic structural diagram of the activated carbon rack in the adsorption and desorption device for detecting the desulfurization value of activated carbon of the present utility model;

[0023] DESCRIPTION OF THE REFERENCE NUMERALS: 1, mixing gas tank; 1-1, drain pipe; 1-2, alkaline solution tank; 1-3, oxygen inlet pipe; 1-4, nitrogen inlet pipe; 1-5, sulfur dioxide inlet pipe; 1-6, water vapor inlet pipe; 2, gas pipeline; 2-1, check valve; 3, preheater; 3-1, cavity; 3-2, docking port; 3-3, exhaust port; 3-4, opening; 3-5, discharge valve; 4, activated carbon rack; 4-1, activated carbon plate compartment; 4-2, cover; 4-3, feed pipe; 4-4, handle end; 4-5, column; 5, heat preservation tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below in conjunction with the drawings and embodiments.

[0025] As Figure 1As shown in the figure, an adsorption and desorption device for detecting the desulfurization value of activated carbon is disclosed in this embodiment, which includes a mixed gas tank 1. A gas pipeline 2 is arranged on the mixed gas tank 1. The gas pipeline 2 spirally surrounds the outer wall of the preheater 3. The spiral design of the gas pipeline 2 helps to increase the heating area of the gas. The outlet of the gas pipeline 2 is communicated with the inner cavity of the preheater 3. An activated carbon rack 4 is detachably connected in the inner cavity of the preheater 3. An exhaust port 3-3 is arranged at the upper end of the preheater 3 for adjusting the air pressure balance in the cavity 3-1. A heat preservation tank 5 is arranged on the outer wall of the preheater 3. The heat preservation tank 5 plays a role in heat preservation for the preheater 3 and the gas pipeline 2 wound around the preheater 3. In this embodiment, a heating wire is arranged in the preheater 3, and the heating function is realized by energizing the heating wire.

[0026] The mixed gas tank 1 is provided with an oxygen inlet pipe 1-3, a nitrogen inlet pipe 1-4, a sulfur dioxide inlet pipe 1-5 and a water vapor inlet pipe 1-6. The bottom of the mixed gas tank 1 is connected with an alkaline solution tank 1-2 through a drain pipe 1-1, and a valve is arranged on the drain pipe 1-1. When oxygen, sulfur dioxide and water vapor are mixed in the mixed gas tank 1, a corrosive acidic liquid will be generated, which will corrode the mixed gas tank 1. In this embodiment, hydrogen peroxide liquid is arranged in the alkaline solution tank 1-2. By opening the valve on the drain pipe 1-1, the acidic liquid in the mixed gas tank 1 can be discharged into the alkaline solution tank 1-2 for a neutralization reaction to reduce its corrosiveness, avoiding the deposition of a large amount of corrosive liquid, thereby prolonging the service life of the mixed gas tank 1.

[0027] In this embodiment, a check valve 2-1 is arranged on the gas pipeline 2. The check valve 2-1 can prevent the excess gas from carrying dust and flowing back into the mixed gas tank 1 along the gas pipeline 2 after the test, causing pipeline blockage.

[0028] As Figure 2 shown, a cavity 3-1 is arranged inside the preheater 3. The activated carbon rack 4 is arranged in the cavity 3-1. A docking port 3-2 is arranged at the lower part of the preheater 3. The outlet of the gas pipeline 2 is hermetically connected with the docking port 3-2. An opening 3-4 is arranged at the top end of the preheater 3. The opening 3-4 is hermetically and detachably connected with the activated carbon rack 4. A discharge valve 3-5 is arranged at the bottom end of the preheater 3 for discharging waste when cleaning the preheater 3.

[0029] As Figure 3 shown, the activated carbon rack 4 includes an activated carbon plate cabin 4-1. The activated carbon plate cabin 4-1 is a spiral cavity plate-like structure. The outer wall of the activated carbon plate cabin 4-1 is a fine mesh-like structure. A buckle cover 4-2 is arranged at the upper part of the activated carbon rack 4. The buckle cover 4-2 is hermetically sealed and cooperated with the opening 3-4 at the top end of the preheater 3. A column 4-5 is arranged in the middle of the buckle cover 4-2. The activated carbon plate cabin 4-1 spirally surrounds and is arranged around the column 4-5, making the activated carbon plate cabin 4-1 more stable.

[0030] The activated carbon board cabin 4-1 is provided with a feed pipe 4-3, which is connected to the entire inner cavity of the activated carbon board cabin 4-1. The feed port of the feed pipe 4-3 is set above the buckle cover 4-2. When activated carbon is added from the feed pipe 4-3, the activated carbon will fall into the activated carbon board cabin 4-1. The outer wall of the activated carbon board cabin 4-1 with a fine mesh structure and a spiral design helps to increase the contact area between the activated carbon and the mixed gas, making the adsorption reaction more sufficient. In addition, a handle end 4-4 is set at the top of the buckle cover 4-2.

[0031] The action process of the utility model is as follows:

[0032] First, when in use, add activated carbon material at the outlet of feed pipe 4-3, then inject corresponding gases into mixed gas tank 1 through oxygen inlet pipe 1-3, sulfur dioxide inlet pipe 1-5 and water vapor inlet pipe 1-6 respectively, and the mixed gas in mixed gas tank 1 enters preheater 3 through docking port 3-2 along gas pipeline 2, and the mixed gas enters cavity 3-1 and adsorbs the activated carbon in activated carbon cabin 4-1. Then, nitrogen is injected into nitrogen inlet pipe 1-4, and nitrogen enters cavity 3-1 and desorbs the activated carbon in activated carbon cabin 4-1. The desulfurization value of activated carbon is calculated according to the amount of sulfur dioxide desorption.

[0033] Specifically, after the adsorption is completed, the temperature is raised to 400±5℃, and the sulfur dioxide inlet pipes 1-5, water vapor inlet pipes 1-6, and oxygen inlet pipes 1-3 are closed in sequence. The entire desorption process is coordinated with the use of nitrogen to purge the mass flow meter, turn off the adsorption and open the desorption 0.3L, the mass flow meter arrow points to the desorption, and the analysis begins, which is maintained for 3h. The analyzed gas is absorbed by two 3L absorption bottles in series and filled with 2L of 3% hydrogen peroxide solution. During the absorption, the absorption bottle should be cooled to room temperature in a water bath. After the absorption is completed, rinse the desorption pipeline and absorption bottle with water, dilute to 5000ml together with the absorption liquid, and mix well. Pour 50ml of the solution into a conical flask, add 3 to 4 drops of methyl red-methyl blue mixed indicator, and titrate with 0.1mol / L NaOH solution. The solution changes from purple to bright green, which is the end point, and the desulfurization value is calculated. The analytical formula is as follows:

[0034]

[0035] V——volume of sodium hydroxide solution consumed by titrating the absorption liquid, ml;

[0036] V0——volume of sodium hydroxide solution consumed in blank test (ml);

[0037] C——the concentration of sodium hydroxide mol / L;

[0038] qv——the value of gas flow rate (standard state) when measuring sulfur dioxide concentration, unit L / min;

[0039] m—the mass of the test sample taken, g;

[0040] 32—the value of the mass of sulfur dioxide equivalent to 1 mmol of sodium hydroxide, mg.

[0041] The check valve 2-1 can prevent the excess gas from entraining dust and flowing back into the mixing gas tank 1 along the gas pipeline 2 under the action of high temperature after the test, causing pipeline blockage. After the detection is completed, by opening the valve on the drain pipe 1-1, the acidic liquid in the mixing gas tank 1 can be discharged into the alkaline solution tank 1-2 for neutralization reaction to reduce its corrosiveness, avoiding the deposition of a large amount of corrosive liquid, thereby prolonging the service life of the mixing gas tank 1.

[0042] When the preheater 3 needs to be cleaned, remove the buckling cover 4-2 from the opening 3-4 at the top of the preheater 3, then the entire activated carbon rack 4 can be taken out. Use a brush to clean the inner wall of the preheater 3, and open the discharge valve 3-5, and the waste after cleaning can be discharged from the discharge valve 3-5.

[0043] The embodiments described above are only descriptions of the preferred modes of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An adsorption and desorption device for detecting the desulfurization value of activated carbon, characterized in that: It includes a mixed gas tank (1), on which a gas pipeline (2) is provided. The gas pipeline (2) spirally surrounds the outer wall of a preheater (3). The outlet of the gas pipeline (2) is communicated with the inner cavity of the preheater (3). An activated carbon rack (4) is detachably connected in the inner cavity of the preheater (3). An exhaust port (3-3) is provided at the upper end of the preheater (3). The bottom of the mixed gas tank (1) is connected to an alkaline solution tank (1-2) through a drain pipe (1-1). A check valve (2-1) is provided on the gas pipeline (2).

2. The adsorption and desorption device for detecting the desulfurization value of activated carbon according to claim 1, wherein: A cavity (3-1) is provided inside the preheater (3). The activated carbon rack (4) is arranged in the cavity (3-1). A docking port (3-2) is provided at the lower part of the preheater (3). The outlet of the gas pipeline (2) is hermetically connected to the docking port (3-2).

3. The adsorption and desorption device for detecting the desulfurization value of activated carbon according to claim 1, characterized in that: A heat preservation tank (5) is provided on the outer wall of the preheater (3).

4. The adsorption and desorption device for detecting the desulfurization value of activated carbon according to claim 1, characterized in that: An opening (3-4) is provided at the top end of the preheater (3). The opening (3-4) is hermetically and detachably connected to the activated carbon rack (4). A discharge valve (3-5) is provided at the bottom end of the preheater (3).

5. The adsorption and desorption device for detecting the desulfurization value of activated carbon according to claim 4, characterized in that: The activated carbon rack (4) includes an activated carbon plate chamber (4-1). The activated carbon plate chamber (4-1) is a spirally hollow plate-like structure. The outer wall of the activated carbon plate chamber (4-1) is a fine mesh-like structure. A buckle cover (4-2) is provided at the upper part of the activated carbon rack (4). The buckle cover (4-2) is hermetically sealed and cooperated with the opening (3-4) at the top end of the preheater (3). The activated carbon plate chamber (4-1) is provided with a feed pipe (4-3). The feed pipe (4-3) is communicated with the whole inner cavity of the activated carbon plate chamber (4-1). The feed port of the feed pipe (4-3) is provided above the buckle cover (4-2).

6. The adsorption and desorption device for detecting the desulfurization value of activated carbon according to claim 5, characterized in that: A handle end (4-4) is provided at the top end of the buckle cover (4-2).

7. The adsorption and desorption device for detecting the desulfurization value of activated carbon according to claim 5, wherein: A column body (4-5) is provided in the middle of the buckle cover (4-2). The activated carbon plate chamber (4-1) spirally surrounds the column body (4-5).

8. The adsorption and desorption device for detecting the desulfurization value of activated carbon according to claim 1, wherein: The mixed gas tank (1) is provided with an oxygen inlet pipe (1-3), a nitrogen inlet pipe (1-4), a sulfur dioxide inlet pipe (1-5) and a water vapor inlet pipe (1-6).

9. The adsorption and desorption device for detecting the desulfurization value of activated carbon according to claim 1, characterized in that: A valve is provided on the drain pipe (1-1).

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