CN215218702U - Detection apparatus for carbon content in liquid chlorine - Google Patents
Detection apparatus for carbon content in liquid chlorine Download PDFInfo
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- CN215218702U CN215218702U CN202121157306.XU CN202121157306U CN215218702U CN 215218702 U CN215218702 U CN 215218702U CN 202121157306 U CN202121157306 U CN 202121157306U CN 215218702 U CN215218702 U CN 215218702U
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- liquid chlorine
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Abstract
The utility model discloses a detection apparatus for carbon content in liquid chlorine belongs to polycrystalline silicon production field, detection apparatus is including the hydrogen production device that connects gradually, be used for carrying out hydrogen and liquid chlorine methanation's reation kettle, cooling device and be used for detecting the gaseous gas chromatograph who carbon content in reation kettle generates, obtain hydrogen through hydrogen production device brineelectrolysis, carry out hydrogen and liquid chlorine methanation through reation kettle, convert the carbonaceous impurity in the liquid chlorine into methane, detect the content sign carbon content of methane through gas chromatograph at last, thereby the content of carbon impurity in the control raw materials. The utility model discloses not directly detecting liquid chlorine, reducing and detecting the risk, checking the stage homoenergetic and detecting carbon content at liquid chlorine production phase and raw materials to at liquid chlorine production process control carbon content, checking the process of accepting and can detecting carbon content, practice thrift manufacturing cost, improve work efficiency.
Description
Technical Field
The utility model relates to a polycrystalline silicon production field especially relates to a detection apparatus of carbon content in liquid chlorine.
Background
At present, the production of polysilicon uses an improved siemens method, wherein the raw material trichlorosilane is synthesized by silicon powder and hydrogen chloride, and the hydrogen chloride is synthesized by liquid chlorine. Carbon impurities in the liquid chlorine can finally affect the quality of the polycrystalline silicon finished product, and the existence form of the carbon in the liquid chlorine is mainly CO and CO2、CH4Since liquid chlorine is extremely toxic, highly irritant and corrosive, it is difficult to directly detect the carbon content with liquid chlorine.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the problem that carbon content is more difficult among the prior art in the detection liquid chlorine, provide a detection device of carbon content among liquid chlorine.
The purpose of the utility model is realized through the following technical scheme:
the utility model provides a detection apparatus for carbon content in liquid chlorine, detection apparatus is including the hydrogen production device that connects gradually, be used for carrying out hydrogen and liquid chlorine methanation's reation kettle, cooling device and be used for detecting reation kettle and generate gaseous gas chromatograph who carbon content in.
Preferably, the detection device further comprises a reaction kettle control device connected with the reaction kettle, the reaction kettle control device comprises a heater and a pressure controller, and the reaction kettle is respectively connected with the heater and the pressure controller.
Preferably, the reaction kettle control device further comprises a protection interlocking device, and the protection interlocking device is connected with the reaction kettle.
Preferably, an exhaust gas absorption device and a moisture absorption device are arranged between the cooling device and the gas chromatograph, the cooling device is respectively connected with the exhaust gas absorption device and the moisture absorption device, and the moisture absorption device is further connected with the gas chromatograph.
Preferably, the cooling device is connected with the exhaust gas absorption device and the moisture absorption device through a three-way valve, an inlet of the three-way valve is connected with the cooling device, one outlet of the three-way valve is connected with the exhaust gas absorption device, the other outlet of the three-way valve is connected with an inlet of the moisture absorption device, and an outlet of the moisture absorption device is connected with the gas chromatograph.
Preferably, a spiral pipe is arranged in the moisture absorption device, the spiral pipe is arranged at the inlet of the moisture absorption device, and a packed column for absorbing moisture is arranged in the spiral pipe.
Preferably, the gas chromatograph includes a hydrogen flame ionization detector.
Preferably, the reaction kettle control device further comprises a current controller and an instrument panel, the current controller is connected with the heater, and the instrument panel is connected with the reaction kettle.
Preferably, the reaction kettle is externally connected with a reaction protection device.
Preferably, the reaction protection device is a nitrogen tank.
It should be further noted that the technical features corresponding to the above-mentioned system options can be combined with each other or replaced to form a new technical solution.
Compared with the prior art, the utility model discloses beneficial effect is:
(1) hydrogen produces device brineelectrolysis and obtains hydrogen, carries out hydrogen and liquid chlorine methanation reaction through reation kettle, wholly converts the carbonaceous impurity in the liquid chlorine into methane, detects the content sign carbon content of methane through gas chromatograph at last to the content of carbon impurity in the control raw materials, the utility model discloses not to liquid chlorine direct detection, reduce the detection risk, avoid the safety problem that direct detection liquid chlorine brought, in addition at liquid chlorine production stage and raw materials acceptance phase homoenergetic and can detect carbon content, thereby at liquid chlorine production process control carbon content, the acceptance process can detect carbon content, practices thrift manufacturing cost, improves work efficiency.
(2) The reaction kettle control device adjusts the reaction conditions of the whole reaction kettle, such as temperature, pressure, flow and the like, and is combined with the protection interlocking device to ensure the stability and safety of the reaction kettle.
(3) The three-way valve controls the amount of the mixed gas, and when the amount of the mixed gas entering the gas chromatograph reaches a certain amount, the three-way valve switches the redundant mixed gas to be discharged into the exhaust gas absorption device and cannot be directly discharged into the air.
(4) Waste gas absorbing device absorbs the waste gas that produces in will reacting, prevents air pollution, and moisture absorbing device absorbs the moisture in the gas mixture, reduces the kind of gas mixture, makes things convenient for gas chromatograph's analysis and detection.
Drawings
FIG. 1 is a schematic view of a device for detecting carbon content in liquid chlorine according to the present invention;
FIG. 2 is a schematic structural view of the reactor control device of the present invention;
fig. 3 is a schematic view of the detecting device with the structures of the waste gas absorbing device, the moisture absorbing device, etc. of the present invention.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are the directions or positional relationships indicated on the basis of the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
The utility model discloses a reation kettle carries out hydrogen and liquid chlorine methanation reaction, converts the carbonaceous impurity in the liquid chlorine into methane, detects the content sign carbon content of methane through gas chromatograph at last to the content of carbon impurity in the control raw materials, the utility model discloses not directly detecting liquid chlorine, reducing the detection risk, avoid the safety problem that directly detects liquid chlorine and bring, in addition at liquid chlorine production stage and raw materials acceptance phase homoenergetic and can detect carbon content, thereby at liquid chlorine production process control carbon content, the acceptance process can detect carbon content, practices thrift manufacturing cost, improves work efficiency.
Example 1
In an exemplary embodiment, as shown in fig. 1, a device for detecting the carbon content in liquid chlorine is provided, and the device comprises a hydrogen generating device 1, a reaction kettle 2 for performing methanation reaction of hydrogen and liquid chlorine, a cooling device 9, and a gas chromatograph 12 for detecting the carbon content in gas generated by the reaction kettle 2, which are connected in sequence.
Specifically, firstly, the hydrogen generating device 1 is adopted to electrolyze pure water and analytically pure sodium hydroxide mixed solution to obtain pure hydrogen, the reaction kettle 2 receives the hydrogen generated by the hydrogen generating device 1, chlorine and hydrogen react in the reaction kettle to generate HCL, and CO in the chlorine2React with hydrogen at high temperature and high pressure to generate CH4And H2O, this step converts all carbon-containing impurities in the liquid chlorine into methane CH4Subsequent analysis only requires analysis of methane CH4The carbon content is known.
Further, the mixed gas generated in the reaction kettle 2 is cooled by a cooling device 9, and the mixed gas (water vapor, HCL, CH) discharged from the reaction kettle 24、H2) Cooling, separating water vapor from the mixed gas in a moisture absorption device, and finally feeding the mixed gas to a gas chromatograph 12 for methane CH4The analysis of (2) just can obtain the content of carbon in the liquid chlorine, need not directly detect liquid chlorine, reduce and detect the risk, avoid the safety problem that directly detects liquid chlorine and bring, can detect carbon content in liquid chlorine production stage and raw materials acceptance phase homoenergetic moreover to at liquid chlorine production process control carbon content, acceptance process can detect carbon content, practices thrift manufacturing cost, improves work efficiency.
Example 2
On the basis of embodiment 1, a device for detecting the carbon content in liquid chlorine is provided, as shown in fig. 2, the device further includes a reaction kettle control device 3 connected to the reaction kettle 2, the reaction kettle control device 3 includes a heater 5 and a pressure controller 14, and the reaction kettle 2 is connected to the heater 5 and the pressure controller 14, respectively.
Specifically, the conditions of the reaction in the reaction vessel 2 are adjusted by the heater 5 and the pressure controller 14, so that the stability and safety of the reaction in the reaction vessel 2 are ensured.
Further, the reaction kettle control device 3 further comprises a protection interlocking device 6, and the protection interlocking device 6 is connected with the reaction kettle 2.
Further, the reaction kettle control device 3 further comprises a current controller 7 and an instrument panel 8, wherein the current controller 7 is connected with the heater 5, and the instrument panel 8 is connected with the reaction kettle 2. Specifically, the current controller 7 can control the current magnitude and the heating time of the heater 5, thereby controlling the reaction temperature of the reaction kettle 2. The instrument panel 8 is used for monitoring the reaction environment of the reaction vessel 2, and specifically, the instrument panel 8 includes a thermometer, a pressure gauge, a meter for monitoring the operation time, and the like.
Further, when the instrument panel 8 detects that the temperature of the reaction kettle 2 is too high or the pressure of the reaction kettle 2 is too high, the protection interlocking device 6 controls the reaction kettle 2 to cut off feeding or release pressure, when the pressure of the reaction kettle 2 is abnormal, the situation of chlorine leakage may exist, and at the moment, the protection interlocking device 6 controls the reaction kettle 2 to stop reaction and discharge chlorine into the safety treatment tank.
The reaction kettle control device 3 adjusts the reaction conditions of the whole reaction kettle, such as temperature, pressure, flow and the like, and is combined with a protection interlocking device to ensure the stability and safety of the reaction kettle.
Example 3
In addition to the above embodiments, there is provided a device for detecting the carbon content in liquid chlorine, as shown in fig. 3, an exhaust gas absorption device 11 and a moisture absorption device 4 are disposed between the cooling device 9 and the gas chromatograph 12, the cooling device 9 is connected to the exhaust gas absorption device 11 and the moisture absorption device 4, respectively, and the moisture absorption device 4 is further connected to the gas chromatograph 12.
Further, the cooling device 9 is connected to the exhaust gas absorption device 11 and the moisture absorption device 4 through a three-way valve 10, an inlet of the three-way valve 10 is connected to the cooling device 9, one outlet of the three-way valve 10 is connected to the exhaust gas absorption device 11, the other outlet of the three-way valve 10 is connected to an inlet of the moisture absorption device 4, and an outlet of the moisture absorption device 4 is connected to the gas chromatograph 12.
Specifically, the exhaust gas absorption device 11 absorbs the exhaust gas generated in the reaction to prevent air pollution, and the moisture absorption device 4 absorbs the moisture in the mixed gas to reduce the types of the mixed gas, thereby facilitating the analysis and detection of the gas chromatograph.
Further, a spiral pipe 41 is arranged in the moisture absorption device 4, the spiral pipe 41 is arranged at the inlet of the moisture absorption device 4, and a packed column for absorbing moisture is arranged in the spiral pipe 41.
When the gas chromatograph 12 is used for modulating the analysis state, the mixed gas enters the spiral pipe 41 of the moisture absorption device 4, the three-way valve of the waste gas absorption device 11 is closed, a packed column for mixing phosphorus pentoxide and glass wool is arranged in the spiral pipe 41, the moisture in the mixed gas is firstly absorbed by the packed column, a packed column for mixing glass wool, phosphorus pentoxide and anhydrous copper sulfate is arranged in a pipeline at the outlet end of the spiral pipe 41, the rest moisture is absorbed by the packed column, and the rest mixed gas is HCL and CH4、H2。
The anhydrous copper sulfate in the part of the packed column can generate color change after absorbing water, and the absorption saturation is slightly blue, so that whether the packed column is saturated or not can be known through the color change of the part of the packed column, and the packed column can be recycled as long as the water is unsaturated. Further, the gas chromatograph 12 includes a hydrogen flame ionization detector.
Further, a reaction protection device 13 is externally connected to the reaction kettle 2.
Further, the reaction protection device 13 is a nitrogen tank. Before the reaction starts, nitrogen purging is carried out by using a nitrogen tank reaction kettle 2 and other pipelines to replace other gases in the reaction kettle and the pipelines so as to protect the device.
The utility model provides an in the embodiment each functional structure can combine according to actual conditions.
The above detailed description is the detailed description of the present invention, and it can not be considered that the detailed description of the present invention is limited to these descriptions, and to the ordinary skilled person in the art to which the present invention belongs, without departing from the concept of the present invention, a plurality of simple deductions and replacements can be made, which should be regarded as belonging to the protection scope of the present invention.
Claims (10)
1. The utility model provides a detection device of carbon content in liquid chlorine which characterized in that: the detection device comprises a hydrogen generation device (1), a reaction kettle (2) for performing hydrogen and liquid chlorine methanation reaction, a cooling device (9) and a gas chromatograph (12) for detecting the carbon content in gas generated by the reaction kettle (2), which are sequentially connected.
2. The device for detecting the carbon content in liquid chlorine according to claim 1, wherein: the detection device further comprises a reaction kettle control device (3) connected with the reaction kettle (2), the reaction kettle control device (3) comprises a heater (5) and a pressure controller (14), and the reaction kettle (2) is connected with the heater (5) and the pressure controller (14) respectively.
3. The device for detecting the carbon content in liquid chlorine according to claim 2, wherein: the reaction kettle control device (3) further comprises a protection interlocking device (6), and the protection interlocking device (6) is connected with the reaction kettle (2).
4. The device for detecting the carbon content in liquid chlorine according to claim 1, wherein: set up waste gas absorbing device (11) and moisture absorbing device (4) between cooling device (9) and gas chromatograph (12), cooling device (9) respectively with waste gas absorbing device (11), moisture absorbing device (4) are connected, moisture absorbing device (4) still are connected with gas chromatograph (12).
5. The device for detecting the carbon content in liquid chlorine according to claim 4, wherein: cooling device (9) are connected with exhaust gas absorption device (11), moisture absorbing device (4) through three-way valve (10), the import and the cooling device (9) of three-way valve (10) are connected, an export and the exhaust gas absorption device (11) of three-way valve (10) are connected, another export and the access connection of moisture absorbing device (4) of three-way valve (10), the export and gas chromatograph (12) of moisture absorbing device (4) are connected.
6. The device for detecting the carbon content in liquid chlorine according to claim 4, wherein: a spiral pipe (41) is arranged in the moisture absorption device (4), the spiral pipe (41) is arranged at an inlet of the moisture absorption device (4), and a filling column for absorbing moisture is arranged in the spiral pipe (41).
7. The device for detecting the carbon content in liquid chlorine according to claim 1, wherein: the gas chromatograph (12) includes a hydrogen flame ionization detector.
8. The device for detecting the carbon content in liquid chlorine according to claim 2, wherein: the reaction kettle control device (3) further comprises a current controller (7) and an instrument panel (8), the current controller (7) is connected with the heater (5), and the instrument panel (8) is connected with the reaction kettle (2).
9. The device for detecting the carbon content in liquid chlorine according to claim 1, wherein: the reaction kettle (2) is externally connected with a reaction protection device (13).
10. The apparatus for detecting carbon content in liquid chlorine according to claim 9, wherein: the reaction protection device (13) is a nitrogen tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121157306.XU CN215218702U (en) | 2021-05-27 | 2021-05-27 | Detection apparatus for carbon content in liquid chlorine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121157306.XU CN215218702U (en) | 2021-05-27 | 2021-05-27 | Detection apparatus for carbon content in liquid chlorine |
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| Publication Number | Publication Date |
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| CN215218702U true CN215218702U (en) | 2021-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121157306.XU Active CN215218702U (en) | 2021-05-27 | 2021-05-27 | Detection apparatus for carbon content in liquid chlorine |
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- 2021-05-27 CN CN202121157306.XU patent/CN215218702U/en active Active
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