CN212396280U - Device for removing metal carbonyl compound in carbon monoxide gas for laboratory - Google Patents
Device for removing metal carbonyl compound in carbon monoxide gas for laboratory Download PDFInfo
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- CN212396280U CN212396280U CN202020637627.9U CN202020637627U CN212396280U CN 212396280 U CN212396280 U CN 212396280U CN 202020637627 U CN202020637627 U CN 202020637627U CN 212396280 U CN212396280 U CN 212396280U
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Abstract
The utility model discloses a device for removing metal carbonyl compounds in carbon monoxide gas for laboratory, which comprises an air supply pipeline, a pyrolysis pipe air inlet stop valve, a pyrolysis pipe air outlet stop valve and a treatment pipeline formed by an air outlet pipeline, wherein the air supply pipeline, the pyrolysis pipe air inlet stop valve, the pyrolysis pipe air outlet stop valve and the air outlet pipeline are connected in sequence along the gas flow direction; and the air leakage port of the safety pressure relief valve is connected to a laboratory waste gas pipeline. The utility model discloses can be simple and easy, safe, stable, quick get rid of impurity component in the laboratory gas, including behind the metal carbonyl compound in the carbon monoxide gas, obtain pure reaction with gas.
Description
Technical Field
The utility model relates to a device of getting rid of metal carbonyl compound in laboratory is with carbon monoxide gas, more specifically says, relates to in catalyst performance and ageing process, with the laboratory evaluation used in the carbon monoxide gas contained metal carbonyl compound impurity component through the device that thermal decomposition got rid of.
Background
With the rapid increase of the number of motor vehicles, the pollution of the discharged gas to the atmosphere is more and more serious, and the environment and the human health are seriously harmed. The installation of the catalyst is the most effective method for controlling the tail gas of the motor vehicle and is an essential part for reducing the emission of harmful substances in the tail gas of the motor vehicle. The performance of the catalyst becomes one of the key factors for judging whether the emission of the motor vehicle reaches the standard or not.
In the design and manufacture process of the catalyst, in order to control the performance of the catalyst, laboratory evaluation and atmosphere furnace aging are required to be carried out in a gas distribution simulating mode, and the gas source is steel cylinder gas.
Carbon monoxide (CO) gas in the cylinder has a certain content of metal carbonyls. The substance can be decomposed and deposited on the inner wall of the equipment pipeline under certain conditions (such as high temperature), so that the gas path is narrowed and blocked, and the use of the equipment is seriously influenced. Meanwhile, the decomposed metal and oxide thereof can be deposited on the surface of the catalyst, especially in the aging process of the catalyst. Since the aging of the catalyst is a long process, a large amount of metal simple substances accumulated on the surface of the catalyst can cover and block the active sites of the catalyst, so that the metal poisoning which is difficult to reverse occurs on the catalyst, and the correct evaluation of the performance of the catalyst is influenced.
Therefore, there is a need to develop a device for removing metal carbonyl compounds in carbon monoxide (CO) gas easily, safely, stably and rapidly for laboratory use.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a laboratory is with device that can simply, safely, stably, get rid of the metal carbonyl compound in carbon monoxide (CO) gas fast, metal carbonyl compound such as: carbonyl iron (Fe (CO))5) Nickel carbonyl (Ni (CO))4) And the like, which may be generated during the production and storage of carbon monoxide (CO) gas.
The principle of the utility model is that pure carbon monoxide (CO) gas is obtained after separating and trapping metal substances (including metal oxides) based on the decomposition of carbonyl iron and nickel at high temperature. Wherein nickel carbonyl (Ni (CO))4) The critical temperature is 180 ℃, carbonyl iron (Fe (CO)5) The critical temperature was 286 ℃.
The chemical formula is:
Fe(CO)5→5CO+Fe
Ni(CO)4→4CO+Ni
in order to achieve the purpose, the device for removing metal carbonyl compounds in carbon monoxide (CO) for laboratories of the utility model consists of a processing pipeline formed by a gas supply pipeline, a pyrolysis pipe gas inlet stop valve, a pyrolysis pipe gas outlet stop valve and a gas outlet pipeline which are sequentially connected along the gas flow direction, a pressure gauge is arranged between the pyrolysis pipe gas outlet stop valve and the gas outlet pipeline, a safety relief valve and a gas outlet stop valve are sequentially arranged on the gas outlet pipeline along the gas outlet direction, a tubular heating furnace is arranged, and the pyrolysis pipe is arranged in the heating furnace; and the air leakage port of the safety pressure relief valve is connected to a laboratory waste gas pipeline.
Preferably, the system further comprises a flow meter, wherein the flow meter is arranged in front of the pyrolysis tube air inlet stop valve of the air supply pipeline and can also be arranged behind the air outlet stop valve of the air outlet pipeline.
The tubular heating furnace preferably has the rated power of 2KW and the maximum temperature of 800 ℃, the length of a constant-temperature area is 270mm, and the heating uniformity is high, so that the tubular heating furnace is suitable for heating pipelines.
Preferably, the gas supply pipeline and the gas outlet pipeline are both made of phi 3mm stainless steel gas pipes, wherein ball valves are used as the gas inlet and gas outlet stop valves of the pyrolysis pipe, and the gas inlet and gas outlet stop valves can be used for cutting off gas flow to perform pipeline pressure maintaining and leakage detection.
Preferably, the pyrolysis tube is a stainless steel tube with the length of 350mm and the diameter of 12mm, 9mm quartz beads are filled in the pyrolysis tube, and two ends of the pyrolysis tube are connected with a pipeline by adopting reducing ferrule joints.
Preferably, a pressure gauge is installed at the position 100mm behind the gas outlet end of the pyrolysis tube, and the maximum measuring range of the pressure gauge is 1.5 MPa.
Preferably, a safety pressure relief valve is installed 50mm behind the pressure gauge, the pressure relief pressure is adjusted to be 0.5Mpa, and a pressure relief pipeline is introduced into a laboratory waste gas collecting pipeline.
Preferably, the two treatment pipelines are arranged in parallel, the tubular heating furnace is a double-tube heating furnace, the rated power of the tubular heating furnace is 2.5KW, the maximum temperature is 1300 ℃, and the length of the constant-temperature area is 400 mm. The tubular heating furnace hearth is linear and has a longer constant temperature area, the heating uniformity in the hearth is high, the tubular heating furnace hearth is suitable for pyrolysis pipelines, and two pipelines can be pyrolyzed simultaneously by two pipes; a pressure gauge is arranged at the position 100mm behind the gas outlet end of the pyrolysis tube, and the maximum measuring range of the pressure gauge is 0.6 MPa; a safety pressure relief valve is installed 50mm behind the pressure gauge, the pressure relief pressure is adjusted to be 0.3Mpa, and meanwhile, a pressure relief pipeline is introduced into a laboratory waste gas collecting pipeline.
The utility model discloses a concrete work flow:
carbon monoxide (CO) gas is led out from a gas path and then enters a pyrolysis pipeline along the preset airflow direction of the device, the pyrolysis pipeline is heated to a certain temperature by a tubular heating furnace, metal carbonyl compounds in the gas are heated and decomposed and then deposited on the surface of quartz beads, and pure carbon monoxide (CO) gas obtained after pyrolysis is fed into a preset pipeline of experimental equipment through a gas feeding pipeline. Meanwhile, as carbon monoxide (CO) gas is combustible and toxic, a pressure gauge, a pressure relief valve and a stop valve are arranged behind the pyrolysis pipeline and at the tail end of the gas supply pipeline of the device and used for checking the gas tightness and safety pressure relief of the device, and danger caused by device leakage and overhigh pressure in the pipeline is prevented.
The heating furnace needs to have a longer constant temperature interval to ensure sufficient pyrolysis.
Since carbon monoxide (CO) gas is a flammable and toxic gas, and the gas expands when heated. Therefore, the air supply pipeline is made of stainless steel materials and connected in a clamping sleeve mode, so that the air supply pipeline is sealed, firm and reliable.
The connecting pieces at the two ends of the pyrolysis pipeline are arranged outside the furnace to prevent heating deformation. The length of the pyrolysis zone is equal to that of the constant-temperature zone of the heating furnace, and meanwhile, quartz beads are filled in the pipeline to increase the gas contact area and enhance the trapping effect of products after pyrolysis. The decomposed metal simple substance can be deposited on the surface of the quartz beads, and the quartz beads are replaced regularly according to the use condition to prevent the pyrolysis tube from being blocked due to excessive accumulation of the deposits.
The air supply pipeline is required to be provided with a pressure gauge and a stop valve, and the pipeline is dismounted every time or is required to be subjected to pressure maintaining inspection at regular intervals, so that the pipeline is ensured to be well sealed without leakage. And meanwhile, a pressure release valve is arranged on the gas path, and the pressure release valve is automatically opened when the pressure of the gas path is too high, and residual gas is introduced into a waste gas pipeline, so that the safety of the device and the environment is ensured.
The beneficial effects of the utility model
The device can effectively remove the metal carbonyl compound of the carbon monoxide gas (CO) to obtain the pure carbon monoxide gas (CO). The metal ash contained in the gas is removed in advance before entering the test equipment to participate in the reaction, so that a heating part of the test equipment is protected from being blocked by the deposited metal ash, and the metal poisoning of the catalyst caused by the contact of the metal ash with the catalyst is avoided. Meanwhile, the device is provided with pressure maintaining and leakage detecting and overpressure and pressure relief functions, so that the use safety of the dangerous gas is fully guaranteed.
Drawings
Fig. 1 is a schematic diagram showing the composition of a processing line of the apparatus for removing metal carbonyls from carbon monoxide gas (CO) for laboratory use according to the present invention.
Fig. 2 is a schematic composition diagram of the apparatus for removing metal carbonyls from carbon monoxide gas (CO) for laboratory use according to the present invention, which has two treatment lines.
In the figure: 1-a flow meter, 2-an air supply pipeline, 3-a pyrolysis pipe, 4-an air outlet pipeline, 5-a pressure gauge, 6-a safety relief valve, 7-an air outlet stop valve, 8-a tubular heating furnace and 9-a laboratory waste gas pipeline.
Detailed Description
Examples 1
As shown in fig. 1, the thermal decomposition apparatus for removing metal carbonyls from carbon monoxide (CO) gas of a catalyst performance test platform comprises a carbon monoxide (CO) gas treatment pipeline, which is composed of a gas supply pipeline, a pyrolysis pipe gas inlet stop valve (not shown), a pyrolysis pipe gas outlet stop valve (not shown) and a gas outlet pipeline, which are connected in sequence along the gas flow direction; the processing pipeline also comprises a pressure gauge arranged between the gas outlet end of the pyrolysis pipe and the gas outlet pipe, and a safety pressure relief valve and a gas outlet stop valve are sequentially arranged on the gas outlet pipe along the gas outlet direction; the treatment pipeline also comprises a tubular heating furnace, and the pyrolysis tube is arranged in the heating furnace; and the air leakage port of the safety pressure relief valve is connected to a laboratory waste gas pipeline.
The pipeline is a stainless steel pipe with the diameter of 3mm, the using pressure of the pipeline is 0.3MPa, and the flow is less than 1000 ml/min. The maximum pressure is not more than 0.5MPa, and the maximum flow is not more than 2000 ml/min.
The flowmeter is arranged behind the air outlet stop valve of the air outlet pipeline, the gas flow is low, but the pressure is high, and the gas is sent into the flowmeter for use after being treated completely. The method is suitable for equipment with low flow.
1. The heating furnace is a tubular heating furnace with the rated power of 2KW and the maximum temperature of 800 ℃. The length of the constant temperature zone is 270 mm. The heating uniformity is high, and the heating pipeline is suitable for heating.
2. The connecting pipeline is consistent with the pipeline in the equipment, and a stainless steel air pipe with the diameter of 3mm is adopted. The air pipe is cut off and is respectively connected with the air inlet end and the air outlet end of the pyrolysis device. Wherein the pyrolysis device is given vent to anger and is held and be connected with the equipment pipeline using the ball valve, can be used to cut off the air current and carry out pipeline pressurize leak hunting.
3. The pyrolysis tube is a stainless steel tube with the length of 350mm and the diameter of 12mm, 9mm quartz beads are filled in the pyrolysis tube, and two ends of the pyrolysis tube are connected with a pipeline by reducing ferrule joints.
4. A pressure gauge is arranged 100mm behind the gas outlet end of the pyrolysis tube, and the maximum measuring range of the pressure gauge is 1.5 MPa.
5. A pressure release valve is arranged 50mm behind the pressure gauge, the pressure release pressure is adjusted to be 0.5Mpa, and a pressure release pipeline is introduced into a laboratory waste gas collecting pipeline.
Effects of use
The device has obvious effect after being put into use, and the carbon monoxide gas heating pipeline blockage fault does not occur again on the performance test platform.
EXAMPLES example 2
As shown in fig. 2, the present embodiment is different from embodiment 1 in that two processing lines are included, and the installation position of the flow meter is different.
The thermal decomposition device for removing metal carbonyl compounds from carbon monoxide (CO) gas of the catalyst chemical atmosphere aging device is provided with two parallel carbon monoxide (CO) gas treatment pipelines, wherein the pipelines are phi 6mm stainless steel gas pipes, the service pressure of the pipelines is less than 0.05MPa, and the service flow is less than 3000 ml/min. The maximum pressure is not more than 0.3MPa, and the maximum flow is not more than 5000 ml/min. Two carbon monoxide (CO) gas circuits need to be used simultaneously.
The flowmeter is arranged in front of a pyrolysis tube gas inlet stop valve (not shown in the figure) of the gas supply pipeline, the gas pressure is low, but the flow rate is large, and the gas flows out after being metered by the mass flowmeter and enters the metal carbonyl compound removing device. Two carbon monoxide (CO) gas circuits independently carry out the pyrolysis and prevent to lead to the pyrolysis effect insufficient because of the flow is too big, are applicable to the higher equipment of flow demand.
1. Because the heating furnace needs to be used simultaneously, a double-tube heating furnace is selected, the rated power of the tube heating furnace is 2.5KW, and the maximum temperature is 1300 ℃. The length of the constant temperature zone is 400 mm. Tubular heating furnace is the line type and has longer constant temperature zone, and the high pyrolysis pipeline that is applicable to of heating homogeneity in the furnace, and two pipelines pyrolysis can be carried out simultaneously to double-barrelled.
2. The connecting pipeline is consistent with the pipeline in the equipment, and a stainless steel gas pipe with the diameter of 6mm is adopted. And cutting off a carbon monoxide gas pipe in the sample testing equipment, and respectively connecting the carbon monoxide gas pipe with a gas inlet end and a gas outlet end of the pyrolysis device. Wherein the pyrolysis device is given vent to anger and is held and be connected with the equipment pipeline using the ball valve, can be used to cut off the air current and carry out pipeline pressurize leak hunting.
3. The pyrolysis tube is a stainless steel tube with the length of 450mm and the diameter of 12mm, 9mm quartz beads are filled in the pyrolysis tube, and two ends of the pyrolysis tube are connected with a pipeline by adopting reducing ferrule joints
4. A pressure gauge is arranged 100mm behind the gas outlet end of the pyrolysis tube, and the maximum measuring range of the pressure gauge is 0.6 MPa.
5. A pressure release valve is arranged 50mm behind the pressure gauge, the pressure release pressure is adjusted to be 0.3Mpa, and a pressure release pipeline is introduced into a laboratory waste gas collecting pipeline.
Effects of use
The device has obvious effect after being put into application, the sample does not have metal poisoning phenomenon after the aging of the catalyst chemical atmosphere aging device, and the sample after the aging treatment can stably react the catalyst degradation performance index.
Claims (9)
1. An apparatus for removing metal carbonyl compound in carbon monoxide gas for laboratory, characterized in that:
the device consists of a processing pipeline formed by a gas supply pipeline, a pyrolysis pipe gas inlet stop valve, a pyrolysis pipe gas outlet stop valve and a gas outlet pipeline which are sequentially connected along the gas flow direction;
the processing pipeline also comprises a pressure gauge arranged between the gas outlet end of the pyrolysis pipe and the gas outlet pipe, and a safety pressure relief valve and a gas outlet stop valve are sequentially arranged on the gas outlet pipe along the gas outlet direction;
the treatment pipeline also comprises a tubular heating furnace, and the pyrolysis tube is arranged in the heating furnace;
and the air leakage port of the safety pressure relief valve is connected to a laboratory waste gas pipeline.
2. The apparatus for removing metal carbonyls from laboratory carbon monoxide gas as claimed in claim 1, wherein:
the treatment pipeline further comprises a flowmeter, and the flowmeter is arranged in front of the pyrolysis pipe air inlet stop valve of the air supply pipeline or behind the air outlet stop valve of the air outlet pipeline.
3. The apparatus for removing metal carbonyls from laboratory carbon monoxide gas as claimed in claim 1, wherein:
the tubular heating furnace is selected to have the rated power of 2KW and the maximum temperature of 800 ℃, the length of a constant-temperature area is 270mm, and the tubular heating furnace is high in heating uniformity and suitable for heating pipelines.
4. The apparatus for removing metal carbonyls from laboratory carbon monoxide gas as claimed in claim 1, wherein:
the gas supply pipeline and the gas outlet pipeline are both made of phi 3mm stainless steel gas pipes, wherein ball valves are used for the gas inlet and gas outlet stop valves of the pyrolysis pipe and are used for intercepting gas flow to perform pipeline pressure maintaining and leakage detection.
5. The apparatus for removing metal carbonyls from laboratory carbon monoxide gas as claimed in claim 1, wherein:
the pyrolysis tube is a stainless steel tube with the length of 350mm and the diameter of 12mm, 9mm quartz beads are filled in the pyrolysis tube, and two ends of the pyrolysis tube are connected with pipelines by reducing ferrule joints.
6. The apparatus for removing metal carbonyls from laboratory carbon monoxide gas as claimed in claim 1, wherein:
and a pressure gauge is arranged at the position 100mm behind the gas outlet end of the pyrolysis tube, and the maximum measuring range of the pressure gauge is 1.5 Mpa.
7. The apparatus for removing metal carbonyls from laboratory carbon monoxide gas according to any one of claims 1 to 6, wherein:
and a safety pressure relief valve is arranged 50mm behind the pressure gauge, the pressure relief pressure is adjusted to be 0.5Mpa, and a pressure relief pipeline is introduced into a laboratory waste gas collecting pipeline.
8. The apparatus for removing metal carbonyls from laboratory carbon monoxide gas according to claim 1 or 2, wherein:
the treatment pipeline has two, and two treatment pipelines are arranged in parallel.
9. The apparatus for removing metal carbonyls from laboratory carbon monoxide gas as claimed in claim 8, wherein:
the tube heating furnace is a double-tube heating furnace, the rated power of the tube heating furnace is 2.5KW, the maximum temperature is 1300 ℃, and the length of the constant temperature area is 400 mm;
the tubular heating furnace hearth is linear and is provided with a constant temperature area, the heating uniformity in the hearth is high, the tubular heating furnace hearth is suitable for pyrolysis pipelines, and two pipelines can be pyrolyzed simultaneously by two pipes;
a pressure gauge is arranged at the position 100mm behind the gas outlet end of the pyrolysis tube, and the maximum measuring range of the pressure gauge is 0.6 MPa;
a safety pressure relief valve is installed 50mm behind the pressure gauge, the pressure relief pressure is adjusted to be 0.3Mpa, and meanwhile, a pressure relief pipeline is introduced into a laboratory waste gas collecting pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020637627.9U CN212396280U (en) | 2020-04-24 | 2020-04-24 | Device for removing metal carbonyl compound in carbon monoxide gas for laboratory |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020637627.9U CN212396280U (en) | 2020-04-24 | 2020-04-24 | Device for removing metal carbonyl compound in carbon monoxide gas for laboratory |
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| CN212396280U true CN212396280U (en) | 2021-01-26 |
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| CN202020637627.9U Active CN212396280U (en) | 2020-04-24 | 2020-04-24 | Device for removing metal carbonyl compound in carbon monoxide gas for laboratory |
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