CN213326741U - Online VOCs detects uses nitrogen gas purification device - Google Patents
Online VOCs detects uses nitrogen gas purification device Download PDFInfo
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- CN213326741U CN213326741U CN202022130748.7U CN202022130748U CN213326741U CN 213326741 U CN213326741 U CN 213326741U CN 202022130748 U CN202022130748 U CN 202022130748U CN 213326741 U CN213326741 U CN 213326741U
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Abstract
The invention relates to a nitrogen purification device for online VOCs detection, which comprises a storage tank and a nitrogen purification device, wherein the storage tank is connected with the nitrogen purification device through a pipeline, the nitrogen purification device comprises a cooling system, a water removal system, a CO/hydrocarbon removal system, a NOx removal system, an adsorption system and a particulate matter removal system, the cooling system, the water removal system, the CO/hydrocarbon removal system, the NOx removal system, the adsorption system and the particulate matter removal system are sequentially connected through pipelines, the nitrogen purification device for online VOCs detection can remove particulate matters, water vapor, hydrocarbons and nitrogen oxides, the purity of output nitrogen is high, and meanwhile, the cost can be saved.
Description
Technical Field
The utility model relates to a gas purification technical field, concretely relates to online VOCs detects uses nitrogen gas purification device.
Background
VOCS is a volatile organic compound, refers to an organic compound with a saturated vapor pressure of more than 70.91Pa at room temperature and a boiling point of less than 260 ℃ at normal pressure, mainly comprises alkanes, aromatics, olefins, halocarbons, esters, aldehydes, ketones and other organic compounds, and the compounds are discharged into the air without being treated and cause great damage to the air quality and the human health.
With the attention of the country to environmental protection in recent years, the emission limit value of VOCs discharged into the air is relatively regulated from the country to the place, the excessive emission is determined when the emission exceeds a certain limit, and the VOCs is required to be immediately treated.
The fixed pollution source online VOCs detection system is used for monitoring the total amount of VOCs, and the purity of nitrogen used in detection is required to be not lower than 99.999 percent according to the regulation of portable gas chromatography-mass spectrometry for determining volatile organic compounds in ambient air. Used nitrogen gas of detection, generally for outsourcing bottled nitrogen gas, the bottled nitrogen gas price of outsourcing is expensive, and the nitrogen gas bottle has the transportation inconvenient, needs shortcomings such as frequent change, and online VOCs detecting system need not intermittent to detect, and nitrogen gas need be continuous supply, and consequently, bottled nitrogen gas is inconvenient in using.
In actual work, nitrogen used by a workshop can be introduced into the online VOCs detection system from a nitrogen production workshop for use, so that the nitrogen supplied uninterruptedly is used, but the purity of the nitrogen produced from the nitrogen production workshop does not reach the requirement of 99.999 percent, and the VOCs detection system is greatly influenced.
Disclosure of Invention
For the problem that the nitrogen gas of overcoming above-mentioned nitrogen making workshop production can not directly be used for VOCs to detect, the utility model relates to an online VOCs detects uses nitrogen gas purification device can overcome the not enough problem of nitrogen gas purity, makes the nitrogen gas of nitrogen making workshop production can use in VOCs detecting system.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the utility model provides an online VOCs detects uses nitrogen gas purification device, online VOCs detects uses nitrogen gas purification device includes holding vessel and nitrogen gas purification device, the holding vessel passes through the pipeline and is connected with nitrogen gas purification device, nitrogen gas purification device includes cooling system, dewatering system, removes CO hydrocarbon system, removes nitric oxide compound system, adsorption system and removes the particulate matter system, cooling system, dewatering system, remove CO hydrocarbon system, remove nitric oxide compound system, adsorption system and remove the particulate matter system and connect gradually through the pipeline.
Further, the cooling system comprises a first filtering device and a first cooling device, the water removal system comprises a water removal device and a renewable washing device, and the nitrogen oxide removal system comprises a second cooling device and a nitrogen oxide removal device.
Further, a first pressure reducing valve is arranged between the storage tank and the nitrogen purification device.
Further, an electromagnetic valve is arranged between the water removal device and the renewable washing device.
Further, a second pressure reducing valve is arranged between the water removal system and the CO/hydrocarbon removal system.
Further, the adsorption system is selected from any one of activated carbon adsorption and zeolite adsorption.
Compared with the prior art, the utility model discloses a characteristics mainly appear:
this online nitrogen gas purification device for VOCs detects can go out particulate matter, vapor, hydrocarbon and oxynitrides, and the nitrogen purity of output is high.
Drawings
FIG. 1 is the utility model discloses a MVR mother liquor deoiling device schematic structure
Wherein the reference numbers are as follows: 1-storage tank, 2-nitrogen purification device, 3-nitrogen making plant, 4-check valve, 5-online VOCs terminal, 101-first pressure reducing valve, 102-solenoid valve, 103-second pressure reducing valve, 11-cooling system, 111-first filtering device, 112-first cooling device, 12-water removing system, 121-water removing device, 122-renewable washing device, 13-CO/hydrocarbon removing system, 14-nitrogen oxide removing system, 141-second cooling device, 142-nitrogen oxide removing device, 15-adsorption system and 16-particulate matter removing system.
Detailed Description
The technical solution in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the structural schematic diagram of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.
As shown in fig. 1, an online nitrogen gas purification device for detecting VOCs, the online nitrogen gas purification device for detecting VOCs includes a storage tank 1 and a nitrogen gas purification device 2, the storage tank 1 is connected with the nitrogen gas purification device 2 through a pipeline, the nitrogen gas purification device 2 includes a cooling system 11, a water removal system 12, a CO/hydrocarbon removal system 13, a nitrogen oxide removal system 14, an adsorption system 15 and a particulate matter removal system 16, and the cooling system 11, the water removal system 12, the CO/hydrocarbon removal system 13, the nitrogen oxide removal system 14, the adsorption system 15 and the particulate matter removal system 16 are sequentially connected through a pipeline.
The cooling system 11 comprises a first filtering device 111 and a first cooling device 112, the nitrogen produced from the nitrogen making workshop 3 is high in humidity, the nitrogen with high humidity passes through a copper pipe cooler to reduce the humidity in the nitrogen, the water removal system 12 comprises a water removal device 121 and a renewable washing device 122, the water removal system 12 can realize water-gas separation, liquid water in the nitrogen is separated from the nitrogen, the nitrogen after passing through the water removal device 121 enters the renewable washing device 122, and the renewable washing device 122 is used for further removing gaseous moisture in the nitrogen.
The nox removal system 14 includes a second cooling device 141 and a nox removal device 142, and the nox removal device 142 is used for converting NO in nitrogen into NO2 under the action of an oxidizing agent at room temperature. The oxidant has a limited life cycle and is purple in color, requiring replacement when 80% of the purple color is converted to tan.
Be provided with first relief pressure valve 101 between holding vessel 1 and the nitrogen gas purification device 2, the nitrogen gas that produces from nitrogen making workshop 3 mainly supplies the workshop to produce and use, when the workshop uses nitrogen gas, nitrogen gas system pressure fluctuation is great, can not satisfy fixed pollution sources online VOCs and detect and use the nitrogen gas pressure requirement, and the holding vessel primary action is for nitrogen gas provides buffer space, steady voltage off-load, installation check valve 4 before the holding vessel, guarantees nitrogen gas air supply system's pressure stability.
An electromagnetic valve 102 is arranged between the water removal device 121 and the renewable washing device 122, the separated water is drained through the electromagnetic valve 102, the electromagnetic valve is opened every 30 minutes to drain water, and the water drainage time is 5 seconds each time. A second pressure reducing valve 103 is arranged between the water removal system 12 and the CO/hydrocarbon removal system 13, and the adsorption system 15 is selected from any one of activated carbon adsorption and zeolite adsorption.
The CO/hydrocarbon removing system 13 converts a small amount of hydrocarbon in nitrogen into CO at the reaction temperature of (300-350) DEG C under the action of a catalyst2And H2O, conversion of CO to CO2. The reaction system includes a housing containing a high temperature reaction chamber containing a particulate noble metal catalyst. The reaction chamber is heated by a heater with a thermocouple and is externally filled with a heat insulating material.
The principle of the reaction is as follows:
the specific operation process is as follows: nitrogen gas of 3 productions in nitrogen making workshop gets into 1 buffer storage of nitrogen gas holding vessel, install check valve 4 before the holding vessel, guarantee nitrogen gas air supply system's pressure stability, nitrogen gas in the holding vessel 1 gets into cooling system 11 through first relief pressure valve 101 decompression, nitrogen gas is at first filtered through first filter equipment 111, the higher nitrogen gas of humidity passes through first cooling device 112, humidity in the nitrogen gas reduces, get into water removal system 12, water removal device 121 separates the liquid water in the nitrogen gas from nitrogen gas, the moisture of separating out is walked through solenoid valve 102, nitrogen gas after the dewatering gets into regenerable washing device 122, further detach the gaseous moisture in the nitrogen gas.
The nitrogen gas with the moisture removed passes through the second pressure reducing valve 103, enters the CO/hydrocarbon removing system 13, CO and hydrocarbon in the nitrogen gas are removed, the nitrogen gas enters the nitrogen oxide removing system 14, the nitrogen gas with high temperature passes through the second cooling device 141, the temperature of the nitrogen gas is reduced, the nitrogen gas enters the nitrogen oxide removing device 142, and NO in the nitrogen gas is converted into NO2The nitrogen enters an adsorption system 15 to remove O in the nitrogen3，SO2，H2S and NH3And enters a particulate removal system 16 to filter out fine particulates in the outgoing nitrogen, the filter being on the order of 10 microns. Through a series of particulate matters, water vapor, hydrocarbon and oxynitrides of removing, nitrogen gas after the purification gets into online VOCs terminal, guarantees online VOCs detection device's normal operating.
To sum up, the utility model discloses an online VOCs detects uses nitrogen gas purification device can go out particulate matter, vapor, hydrocarbon and oxynitrides, and the nitrogen gas purity of output is high, can practice thrift the cost simultaneously.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and it is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (6)
1. The utility model provides an online VOCs detects uses nitrogen gas purification device, its characterized in that, online VOCs detects uses nitrogen gas purification device and includes holding vessel (1) and nitrogen gas purification device (2), holding vessel (1) is connected with nitrogen gas purification device (2) through the pipeline, nitrogen gas purification device (2) include cooling system (11), water removal system (12), remove CO hydrocarbon system (13), remove NOx system (14), adsorption system (15) and remove particulate matter system (16), cooling system (11), water removal system (12), remove CO hydrocarbon system (13), remove NOx system (14), adsorption system (15) and remove particulate matter system (16) and connect gradually through the pipeline.
2. The nitrogen gas purification device for online VOCs detection as claimed in claim 1, wherein the cooling system (11) comprises a first filtering device (111) and a first cooling device (112), the water removal system (12) comprises a water removal device (121) and a regenerable scrubbing device (122), and the nox removal system (14) comprises a second cooling device (141) and a nox removal device (142).
3. The nitrogen purification device for online detection of VOCs according to claim 2, wherein a first pressure reducing valve (101) is provided between the storage tank (1) and the nitrogen purification device (2).
4. The nitrogen purification device for online VOCs detection as claimed in claim 3, wherein a solenoid valve (102) is provided between the water removal device (121) and the regenerable scrubbing device (122).
5. The nitrogen purification device for online VOCs detection as claimed in claim 4, wherein a second pressure reducing valve (103) is provided between the water removal system (12) and the CO/hydrocarbon removal system (13).
6. The nitrogen purification apparatus for online VOCs detection as claimed in claim 5, wherein said adsorption system (15) is selected from any one of activated carbon adsorption and zeolite adsorption.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022130748.7U CN213326741U (en) | 2020-09-25 | 2020-09-25 | Online VOCs detects uses nitrogen gas purification device |
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| CN202022130748.7U CN213326741U (en) | 2020-09-25 | 2020-09-25 | Online VOCs detects uses nitrogen gas purification device |
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| CN213326741U true CN213326741U (en) | 2021-06-01 |
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