Dioxin atmosphere generating device

Abstract

The utility model discloses a dioxin atmosphere generating device which comprises a carrying gas pipe, a diluting gas pipe group, a constant heat box and a uniform mixing chamber, the carrying gas pipe and the diluting gas pipe group are converged to the uniform mixing chamber; a dioxin solid is arranged in the constant heat box, the constant heat box is in butt joint with the carrying gas pipe, and the carrying gas flows through the heated dioxin solid to form a dioxin mixed gas; dioxin mixed gas and diluent gas of the diluent gas pipe group converge to a uniform mixing chamber, a uniform mixing mechanism for uniformly stirring and mixing the dioxin mixed gas and the diluent gas to form a dioxin atmosphere is arranged in the uniform mixing chamber, and a dioxin concentration detection device is arranged in the uniform mixing chamber. According to the utility model, the dioxin solid is subjected to water bath heating and the carrier gas and the diluent gas are introduced, so that the dioxin atmosphere with the required concentration can be obtained, and the influence on the research on the adsorption performance of the activated carbon caused by mixing irrelevant miscellaneous gas into the dioxin atmosphere is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of dioxin atmosphere preparation, in particular to a dioxin atmosphere generating device. Background Art

[0002] Activated carbon can adsorb dioxins, and by studying their adsorption, it is possible to study the adsorption properties of the prepared activated carbon. However, prior art techniques for adsorbing dioxins, which are present in industrial flue gas, require prior gas treatment, such as purification, which is cumbersome. Furthermore, the resulting dioxin atmosphere is unstable, affecting the accuracy of studies on the adsorption properties of activated carbon. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a dioxin atmosphere generating device. By heating the dioxin solid in a water bath and introducing a carrying gas and a diluent gas, a dioxin atmosphere of a desired concentration can be obtained, thereby avoiding the mixing of irrelevant impurities in the dioxin atmosphere and affecting the adsorption performance of activated carbon.

[0004] Technical solution: To achieve the above-mentioned purpose, the present invention provides a dioxin atmosphere generating device, comprising a carrying air pipe, a dilution air pipe group, a constant temperature box and a mixing chamber; the carrying air pipe and the dilution air pipe group converge into the mixing chamber; the constant temperature box contains a dioxin solid and is connected to the carrying air pipe, and the carrying air flows through the heated dioxin solid to form a dioxin mixed gas; the dilution air from the dilution air pipe group and the dilution air flows into the mixing chamber, which is equipped with a mixing mechanism for stirring the dioxin mixed gas and the dilution air to form a dioxin atmosphere, and the mixing chamber is provided with a dioxin concentration detection device.

[0005] Furthermore, the constant temperature box is provided with a water bath pot; the constant temperature box is a double-layer box structure with an outer layer covering an inner layer, the outer layer is a water bath heating layer connected to the water bath pot through a circulating water channel to form a circulating water bath heating circuit, and the inner layer is a constant temperature volatilization layer for heating dioxin solids, and the carrying air pipe is connected to the constant temperature volatilization layer.

[0006] Furthermore, the constant-heat volatilization layer contains a DBF organic solvent, and the dioxin solid is dissolved in the DBF organic solvent.

[0007] Furthermore, a carrying air valve is installed on the carrying air pipe, and a dilution air valve group is installed on the dilution air pipe group.

[0008] Furthermore, the carrying gas pipe is a nitrogen carrying gas pipe; the dilution gas pipe group includes a nitrogen dilution tube and an oxygen dilution tube; the dilution gas valve group includes a nitrogen valve correspondingly installed on the nitrogen dilution tube and an oxygen valve correspondingly installed on the oxygen dilution tube.

[0009] Furthermore, the carrying gas valve, nitrogen valve and oxygen valve are all gas regulating valves.

[0010] Furthermore, it also includes a dioxin atmosphere storage chamber, which is connected to the mixing chamber through a dioxin atmosphere pipeline. The air inlet of the dioxin atmosphere storage chamber is provided with a gas input valve, and the air outlet of the dioxin atmosphere storage chamber is provided with a gas output valve.

[0011] Beneficial effects: The utility model can obtain a dioxin atmosphere of the required concentration by heating the dioxin solid in a water bath and introducing a carrying gas and a diluent gas. The process can obtain a stable dioxin atmosphere without the participation of irrelevant gases, thereby avoiding the influence of irrelevant impurities mixed in the dioxin atmosphere on the adsorption performance of activated carbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] like Figure 1 As shown, a dioxin atmosphere generating device includes a carrier gas pipe 1, a dilution gas pipe group, a constant temperature box 2, and a mixing chamber 3. The carrier gas pipe 1 and the dilution gas pipe group converge into the mixing chamber 3. The constant temperature box 2 contains a dioxin solid and is connected to the carrier gas pipe 1. The carrier gas flows through the heated dioxin solid to form a dioxin mixed gas. The dilution gas from the dilution gas pipe group converges into the mixing chamber 3. The mixing chamber 3 contains a mixing mechanism 30 for mixing the dioxin mixed gas and the dilution gas to form a dioxin atmosphere. The mixing chamber 3 is also equipped with a dioxin concentration detection device 31. The present invention achieves a dioxin atmosphere of the desired concentration by heating the dioxin solid in a water bath and introducing the carrier gas and dilution gas. This process produces a stable dioxin atmosphere free of extraneous gases, thereby preventing the incorporation of extraneous gases into the dioxin atmosphere and potentially affecting the activated carbon adsorption performance.

[0015] The dioxin concentration detection device 31 of the present invention can be an ERUN-PG51TCDD fixed dioxin gas detector, an electrochemical sensor, or the like.

[0016] The constant-temperature box 2 is provided with a corresponding water bath 4. The constant-temperature box 2 is a double-layered box structure, with an outer layer enclosing an inner layer. The outer layer is a water bath heating layer connected to the water bath 4 via a circulating water path 40, forming a circulating water bath heating circuit. The inner layer is a constant-temperature volatile layer 20 for heating dioxin solids. The carrying air pipe 1 is connected to the constant-temperature volatile layer 20. Water bath heating offers the advantages of uniform temperature, high temperature controllability, and high safety, making it ideal for constant-temperature heating of dioxin solids. The present invention preferably controls the temperature of the dioxin solids at 80°C.

[0017] The constant-heat volatilization layer 20 contains a DBF organic solvent, and dioxin solids are dissolved in the DBF organic solvent.

[0018] The carrier gas pipe 1 is mounted with a carrier gas valve 7, and the dilution gas pipe assembly is mounted with a dilution gas valve assembly. The carrier gas pipe 1 is a nitrogen carrier gas pipe; the dilution gas pipe assembly includes a nitrogen dilution pipe 10 and an oxygen dilution pipe 5. The dilution gas valve assembly includes a nitrogen valve 9 correspondingly mounted on the nitrogen dilution pipe 10 and an oxygen valve 8 correspondingly mounted on the oxygen dilution pipe 5. The carrier gas valve 7, nitrogen valve 9, and oxygen valve 8 are all gas regulating valves. Nitrogen is used as the carrier gas for dioxins, and nitrogen and oxygen are selected as dilution gases. The carrier gas flow can be controlled by the carrier gas valve 7, while the dilution gas flow can be controlled by the nitrogen valve 9 and oxygen valve 8.

[0019] In order to store the prepared dioxin atmosphere for subsequent research on the adsorption performance of activated carbon, the utility model also includes a dioxin atmosphere storage chamber 6, which is connected to the mixing chamber 3 through a dioxin atmosphere pipeline 13. The air inlet of the dioxin atmosphere storage chamber 6 is provided with a gas input valve 12, and the air outlet of the dioxin atmosphere storage chamber 6 is provided with a gas output valve 14. The gas input valve 12 and the gas output valve 14 are both electrically operated. During the dioxin atmosphere preparation process, the gas input valve 12 remains closed. Only when the dioxin atmosphere needs to be stored, the gas input valve 12 is opened to store the dioxin atmosphere in the dioxin atmosphere storage chamber 6.

[0020] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A dioxin atmosphere generating device, characterized in that: The invention comprises a carrying air pipe (1), a dilution air pipe group, a constant temperature box (2) and a mixing chamber (3); the carrying air pipe (1) and the dilution air pipe group are combined into the mixing chamber (3); the constant temperature box (2) is equipped with a dioxin solid and is connected to the carrying air pipe (1); the carrying air flows through the heated dioxin solid to form a dioxin mixed gas; the dioxin mixed gas and the dilution air from the dilution air pipe group are combined into the mixing chamber (3); the mixing chamber (3) is equipped with a mixing mechanism (30) for mixing the dioxin mixed gas and the dilution gas to form a dioxin atmosphere, and the mixing chamber (3) is provided with a dioxin concentration detection device (31).

2. A dioxin atmosphere generating device according to claim 1, characterized in that: The constant temperature box (2) is provided with a water bath (4) in correspondence; the constant temperature box (2) is a double-layer box structure with an outer layer covering an inner layer, the outer layer being a water bath heating layer connected to the water bath (4) through a circulating water path (40) to form a circulating water bath heating circuit, and the inner layer being a constant temperature volatilization layer (20) for heating dioxin solids, and the carrying air pipe (1) is connected to the constant temperature volatilization layer (20).

3. A dioxin atmosphere generating device according to claim 2, characterized in that: The constant-heat volatilization layer (20) contains a DBF organic solvent, and the dioxin solid is dissolved in the DBF organic solvent.

4. A dioxin atmosphere generating device according to claim 2, characterized in that: The carrying air pipe (1) is provided with a carrying air valve (7), and the dilution air pipe group is provided with a dilution air valve group.

5. The dioxin atmosphere generating device according to claim 4, characterized in that: The carrying air pipe (1) is a nitrogen carrying air pipe; the dilution air pipe group comprises a nitrogen dilution pipe (10) and an oxygen dilution pipe (5); and the dilution air valve group comprises a nitrogen valve (9) correspondingly mounted on the nitrogen dilution pipe (10) and an oxygen valve (8) correspondingly mounted on the oxygen dilution pipe (5).

6. The dioxin atmosphere generating device according to claim 5, characterized in that: The carrying gas valve (7), nitrogen valve (9) and oxygen valve (8) are all gas regulating valves.

7. A dioxin atmosphere generating device according to any one of claims 1 to 6, characterized in that: The invention also includes a dioxin atmosphere storage chamber (6), wherein the dioxin atmosphere storage chamber (6) is connected to the mixing chamber (3) via a dioxin atmosphere pipeline (13), a gas input valve (12) is provided at the air inlet of the dioxin atmosphere storage chamber (6), and a gas output valve (14) is provided at the air outlet of the dioxin atmosphere storage chamber (6).

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