CN114088594B - Online gas pretreatment system performance determining device and method - Google Patents
Online gas pretreatment system performance determining device and method Download PDFInfo
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- CN114088594B CN114088594B CN202010854502.6A CN202010854502A CN114088594B CN 114088594 B CN114088594 B CN 114088594B CN 202010854502 A CN202010854502 A CN 202010854502A CN 114088594 B CN114088594 B CN 114088594B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000012528 membrane Substances 0.000 claims abstract description 137
- 239000002245 particle Substances 0.000 claims abstract description 25
- 239000012535 impurity Substances 0.000 claims abstract description 24
- 239000007789 gas Substances 0.000 claims description 240
- 238000001914 filtration Methods 0.000 claims description 43
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 33
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 33
- 239000013618 particulate matter Substances 0.000 claims description 26
- 239000000443 aerosol Substances 0.000 claims description 25
- 238000012360 testing method Methods 0.000 claims description 12
- 239000011148 porous material Substances 0.000 claims description 10
- 239000002274 desiccant Substances 0.000 claims description 6
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002808 molecular sieve Substances 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 3
- 230000006837 decompression Effects 0.000 claims 2
- 238000001035 drying Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 14
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- 239000000428 dust Substances 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 7
- 238000004880 explosion Methods 0.000 description 7
- 239000003595 mist Substances 0.000 description 7
- 239000003345 natural gas Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000010926 purge Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N2015/084—Testing filters
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
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- Analytical Chemistry (AREA)
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Abstract
The application discloses a device and a method for determining the performance of an online gas pretreatment system, and belongs to the technical field of gas detection treatment. The determining device comprises a gas cylinder containing preset pressure gas, an impurity adding device and an impurity collecting device, wherein the impurity adding device comprises a first membrane filter or atomizer with particles, the gas cylinder containing the preset pressure gas, the first membrane filter or atomizer and an inlet end of a gas pretreatment system with performance to be determined are sequentially connected, and the particles are positioned on one side close to the gas cylinder containing the preset pressure gas; the impurity collecting device comprises a second membrane filter and a dryer, and the outlet end of the gas pretreatment system to be determined in performance, the second membrane filter and the dryer are sequentially connected. The device can realize the simple and quick determination of the performance of the pretreatment system by simulating the on-line gas containing impurities under the condition of no need of using power electricity.
Description
Technical Field
The application relates to the technical field of gas detection treatment, in particular to a device and a method for determining the performance of an online gas pretreatment system.
Background
Currently, gas analyzers are commonly used to analyze the composition, content, etc. of gases. Since the gas sensor in the gas analyzer does not have waterproof performance, the gas analyzer requires the gas to be measured to be dry and dust-free. However, since the gas to be measured generally carries trace dust and aerosol after the treatment processes of desulfurization, dehydration, hydrate inhibition, etc., the gas to be measured needs to be pretreated by a gas pretreatment system before being introduced into the gas analyzer, so as to eliminate the trace dust and aerosol carried by the gas to be measured.
In the related art, the performance determination of the gas pretreatment system is usually performed in a laboratory, and the dust filtration and the aerosol filtration of the gas pretreatment system are determined by a particle filtration device performance evaluation method (for example, SY/T7034-2016) and an aerosol filtration device performance evaluation method (for example, Q/03399PLD 002-2016), respectively.
However, no online gas pretreatment system performance determining device and method exist at present, and the particle filtering device performance evaluating method in the related technology needs to use a particle generator, so that the particle filtering device can be normally used under the condition of using power electricity, and in consideration of the explosion prevention of electricity, the explosion risk occurs once preventive measures are not taken in place, so that certain potential safety hazard exists.
Disclosure of Invention
In view of the above, the application provides a device and a method for determining the performance of an online gas pretreatment system, which can realize the simple and rapid determination of the performance of the pretreatment system by simulating the online gas containing impurities under the condition of no need of using power electricity.
Specifically, the method comprises the following technical scheme:
In one aspect, an embodiment of the present application provides an online gas pretreatment system performance determining apparatus, where the determining apparatus includes: a gas cylinder containing gas with preset pressure, an impurity adding device and an impurity collecting device, wherein,
The impurity adding device comprises a first membrane filter or an atomizer with particles, wherein the gas cylinder containing the gas with preset pressure, the first membrane filter or the atomizer are sequentially connected with the inlet end of a gas pretreatment system with the performance to be determined, and the particles are positioned on one side close to the gas cylinder containing the gas with the preset pressure;
the impurity collecting device comprises a second membrane filter and a dryer, and the outlet end of the gas pretreatment system with the performance to be determined, the second membrane filter and the dryer are sequentially connected.
In one possible design, the preset pressure is greater than atmospheric pressure.
In one possible design, the pore size of the filter membrane in the first membrane filter is larger than the pore size of the filter membrane in the second membrane filter.
In one possible design, the dryer is a micro-dryer tube with the addition of a desiccant, wherein the desiccant is one of silica gel, molecular sieve, or phosphorus pentoxide.
In one possible design, the determining means further comprises: the pressure-reducing valve is provided with a pressure-reducing valve,
The pressure reducing valve is positioned between the gas cylinder containing the gas with preset pressure and the first membrane filter or the atomizer.
In one possible design, the determining means further comprises: a hydrogen sulfide measuring instrument, which comprises a hydrogen sulfide measuring device,
The outlet end of the gas pretreatment system with the performance to be determined is connected with the hydrogen sulfide analyzer, and the hydrogen sulfide analyzer, the second membrane filter and the dryer are positioned on different connecting branches.
In one possible design, the determining means further comprises: the pressure of the fluid in the fluid is measured by the pressure sensor,
The pressure sensor is located between the outlet end of the gas pretreatment system for which the performance is to be determined and the second membrane filter or the hydrogen sulfide meter.
In one possible design, the determining means further comprises: the temperature of the liquid in the liquid is measured by a temperature sensor,
The temperature sensor is located between the outlet end of the gas pretreatment system for which performance is to be determined and the second membrane filter or the hydrogen sulfide meter.
In one possible design, the determining means further comprises: a differential pressure gauge is arranged on the inner wall of the pressure sensor,
One end of the differential pressure gauge is connected with the inlet end of the gas pretreatment system with the performance to be determined, and the other end of the differential pressure gauge is connected with the outlet end of the gas pretreatment system with the performance to be determined.
In another aspect, an embodiment of the present application provides a performance determining method using the performance determining apparatus of an online gas pretreatment system according to any one of the above aspects, the performance determining method including:
Acquiring a first mass of a first membrane filter and/or a first mass of an atomizer, a first mass of a second membrane filter and a first mass of a dryer with particulate matter before the test;
Starting a gas cylinder containing gas with preset pressure, starting a gas pretreatment system with to-be-determined performance, and continuing for preset time;
acquiring the second mass of the first membrane filter with the particulate matters and/or the second mass of the atomizer, the second mass of the second membrane filter and the second mass of the dryer after the preset time;
And calculating the particulate matter filtering efficiency and/or the aerosol filtering efficiency of the gas pretreatment system with the performance to be determined according to the first mass of the first membrane filter with the particulate matter and/or the first mass of the atomizer, the first mass of the second membrane filter, the first mass of the dryer, the second mass of the first membrane filter with the particulate matter and/or the second mass of the atomizer, the second mass of the second membrane filter and the second mass of the dryer.
The technical scheme provided by the embodiment of the application has the beneficial effects that at least:
The gas cylinder containing the gas with the preset pressure, the first membrane filter or the atomizer and the gas pretreatment system with the performance to be determined are sequentially connected, so that the gas can flow out of the gas cylinder containing the preset pressure, carry particulate matters through the first membrane filter or carry aerosol through the atomizer and then enter the gas pretreatment system with the performance to be determined for pretreatment.
When the performance of the gas pretreatment system with the performance to be determined needs to be judged, as the outlet end of the gas pretreatment system with the performance to be determined is connected with the second membrane filter and the dryer, the particle filtering efficiency and/or the aerosol filtering efficiency of the gas pretreatment system with the performance to be determined can be obtained by acquiring the first mass of the first membrane filter and/or the first mass of the first atomizer, the first mass of the second membrane filter and the first mass of the dryer before the test is performed, and the acquired second mass of the first membrane filter and/or the second mass of the first atomizer after the gas pretreatment system with the performance to be determined is started for a preset time, and judging the performance of the gas pretreatment system based on the particle filtering efficiency and/or the aerosol filtering efficiency.
Because the gas cylinder containing the gas with preset pressure and the first membrane filter with the particulate matters are used for determining the performance of the online gas pretreatment system, the simple and rapid determination of the performance of the pretreatment system is realized under the condition that power electricity is not required, the explosion accident possibly caused by electricity consumption is avoided, and the existing potential safety hazard is eliminated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a device for determining performance of an online gas pretreatment system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of another apparatus for determining performance of an online gas pretreatment system according to an embodiment of the present application;
FIG. 3 is a schematic illustration of a method for determining performance using an online gas pretreatment system performance determining apparatus according to an embodiment of the present application.
Reference numerals in the drawings are respectively expressed as:
1-a gas cylinder containing gas with preset pressure, 2-an impurity adding device, 3-an impurity collecting device, 31-a second membrane filter, 32-a dryer, 4-a gas pretreatment system with performance to be determined, 5-a pressure reducing valve, 6-a hydrogen sulfide tester, 7-a pressure sensor, 8-a temperature sensor, 9-a differential pressure meter and 10-a stop valve.
Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Unless defined otherwise, all technical terms used in the embodiments of the present application have the same meaning as commonly understood by one of ordinary skill in the art. Before describing the application embodiments in further detail, some terms for understanding embodiments of the present application will be described.
In the embodiments of the present application, the "membrane filter" referred to is a filter membrane in which the middle filter membrane is of micron order.
The "atomizer" is a small portable atomizer, and has a replaceable battery inside, and does not need to use power electricity.
The related gas pretreatment system is of an existing structure and is generally composed of a gas-liquid separator, a filter, a pressure reducing valve and a temperature control adjusting component, and is used for removing particulate matters and gas mist in gas, decompressing and outputting high-pressure gas, changing the pressure or the temperature of the gas and outputting the gas.
In order to make the technical scheme and advantages of the present application more apparent, embodiments of the present application will be described in further detail with reference to the accompanying drawings.
In order to determine the composition and content of the gas, the most commonly used equipment is a gas analyzer. By inputting the gas to be measured into the gas analyzer, the gas sensor therein can detect and determine the composition and content therein. However, since the gas sensor itself does not have waterproof performance, the gas to be measured to be inputted into the gas analyzer needs to be dried and dust-free to avoid affecting the gas sensor, thereby reducing the service life of the gas analyzer.
At present, trace dust and gas mist are generally entrained after the gas to be measured is subjected to the treatment processes of desulfurization, dehydration, hydrate inhibition and the like, so that the gas to be measured needs to be pretreated by a gas pretreatment system to eliminate the trace dust and gas mist entrained by the gas to be measured before the gas to be measured is introduced into a gas analyzer, and the influence of the trace dust and gas mist on the gas analyzer or the damage of the gas analyzer are prevented. The performance of the gas pretreatment system directly influences the pretreatment result of the gas, and has an important influence on the service life of the gas analyzer. To characterize the processing capacity of a gas pretreatment system, a determination of the performance of the gas pretreatment system is required.
In the related art, the performance determination of the gas pretreatment system is usually performed in a laboratory, and the dust filtration condition and the aerosol filtration condition of the gas pretreatment system are determined by using a particle filtration device performance evaluation method (for example, SY/T7034-2016) and an aerosol filtration device performance evaluation method (for example, Q/03399PLD 002-2016). However, there is no device and method for determining the performance of an online gas pretreatment system, and the method for evaluating the performance of a particle filter device and the method for evaluating the performance of an aerosol filter device need to test particles and aerosols in gas respectively, wherein the particle filter device needs to use a particle generator in the method for evaluating the performance of the particle filter device, so that the particle filter device can be normally used under the condition of using power electricity, if the performance of the online gas pretreatment system needs to be directly determined by simulating in laboratory conditions, and in consideration of the requirement of explosion prevention of electricity, the explosion risk occurs once preventive measures are not taken, so that a certain potential safety hazard exists.
In order to provide an online gas pretreatment system performance determining device and eliminate potential safety hazards existing in the prior art, an embodiment of the application provides an online gas pretreatment system performance determining device, which is shown in fig. 1.
Referring to fig. 1, the determining apparatus includes: a gas cylinder 1 containing a gas of a preset pressure, an impurity adding device 2 and an impurity collecting device 3.
The impurity adding device 2 comprises a first membrane filter or atomizer with particles, wherein the gas cylinder 1 containing the gas with preset pressure, the first membrane filter or atomizer and the inlet end of the gas pretreatment system 4 with the performance to be determined are sequentially connected, and the particles are positioned at one side close to the gas cylinder 1 containing the gas with the preset pressure. When the impurity adding device 2 is a first membrane filter with particulate matters, the gas cylinder 1 containing gas with preset pressure is opened, and the gas flowing out of the gas cylinder 1 can sweep part of the particulate matters through the first membrane filter along with the gas into the gas pretreatment system 4 with the performance to be determined by sweeping the first membrane filter with the particulate matters; when the impurity adding device 2 is an atomizer, the gas cylinder 1 containing the gas with preset pressure is opened, and part of the gas mist can be carried along with the gas to be purged into the gas pretreatment system 4 with the determined performance when the gas flowing out of the gas cylinder 1 passes through the atomizer. That is, gas-entrained particulate matter may be provided using a first membrane filter having particulate matter and gas-entrained aerosol may be provided using an atomizer.
The impurity collecting apparatus 3 includes a second membrane filter 31 and a dryer 32, and the outlet end of the gas pretreatment system 4 to be determined in performance, the second membrane filter 31 and the dryer 32 are connected in this order, and the particulate matters which are not filtered by the gas pretreatment system 4 to be determined in performance, including solid particulate matters such as SiO 2 and liquid particulate matters such as water droplets, can be collected by the second membrane filter 31, and the aerosol which is not filtered by the gas pretreatment system 4 to be determined in performance can be collected by the dryer.
It will be appreciated that the gas cylinder 1 containing the gas under pressure, the first membrane filter or atomizer, the gas pretreatment system 4 for which the performance is to be determined, the second membrane filter 31 and the dryer 32 are in communication by means of pipes.
The working principle of the online gas pretreatment system performance determining device provided by the embodiment of the application is as follows:
When the performance of the gas pretreatment system 4 to be determined is required to be determined, the particulate matter filtering efficiency and/or the aerosol filtering efficiency of the gas pretreatment system 4 to be determined can be obtained by acquiring the first mass of the first membrane filter and/or the first mass of the first atomizer, the first mass of the second membrane filter 31 and the first mass of the dryer 32 before the test is performed, and the acquired second mass of the first membrane filter and/or the second mass of the first atomizer after the gas pretreatment system 4 to be determined is started for a preset time after the gas bottle 1 containing the gas of the preset pressure is started, and the second mass of the second membrane filter 31 and the second mass of the dryer 32 are started, so that the particulate matter filtering efficiency and/or the aerosol filtering efficiency of the gas pretreatment system 4 to be determined can be determined based on the performance of the gas pretreatment system 4.
Here, the particulate matter filtering efficiency may be obtained according to the following formula:
Wherein A is the filtration efficiency of particulate matter; Δm is the difference between the first mass of the first membrane filter and the second mass of the first membrane filter in g; Δm is the difference between the first mass of the second membrane filter 31 and the second mass of the second membrane filter 31 in g.
The aerosol filtration efficiency can be obtained according to the following formula:
Wherein B is the filtration efficiency of the aerosol; Δm is the difference between the first mass of the first membrane filter and the second mass of the first membrane filter in g; Δm is the difference between the first mass of the second membrane filter 31 and the second mass of the second membrane filter 31 in g; ΔM Dryer is the difference between the first mass of dryer 32 and the second mass of dryer 32, in g.
Therefore, the device for determining the performance of the online gas pretreatment system provided by the embodiment of the application can determine the performance of the online gas pretreatment system by utilizing the gas cylinder 1 containing the gas with preset pressure and the first membrane filter with the particulate matters, and can realize simple and rapid determination of the performance of the pretreatment system without using power electricity, thereby avoiding explosion accidents possibly occurring during electricity consumption and eliminating the existing potential safety hazards. Meanwhile, since power electricity is not required, the determination device is miniaturized.
In one possible design, the preset pressure of the gas in the cylinder 1 may be greater than atmospheric pressure in order to ensure that the test can be performed at atmospheric pressure.
In one possible design, the pore size of the filter membrane in the first membrane filter is larger than the pore size of the filter membrane in the second membrane filter 31.
For example, the pore size of the filter membrane in the first membrane filter may be 0.5 μm and the pore size of the filter membrane in the second membrane filter 31 may be 0.1 μm.
Optionally, the filtration specifications of the first membrane filter and the second membrane filter 31 are the same, so as to unify the calculation criteria.
In one possible design, the dryer 32 is a micro-dryer tube with desiccant added. The drying agent may be one of silica gel, molecular sieve or phosphorus pentoxide, which is convenient for obtaining materials, and is not particularly limited herein.
In one possible design, if the pressure value of the gas with the preset pressure in the gas cylinder 1 is larger, in order to meet the test requirement, the device for preventing the high pressure from damaging the structure in the device, referring to fig. 2, the device for determining the performance of the online gas pretreatment system provided by the embodiment of the application may further include: a pressure reducing valve 5.
Wherein, the pressure reducing valve 5 is positioned between the gas cylinder 1 containing the gas with preset pressure and the first membrane filter or the atomizer, and is used for adjusting the pressure of the gas in the pipeline.
In one possible design, referring to fig. 2, when the gas contains hydrogen sulfide, the device for determining the performance of the online gas pretreatment system according to the embodiment of the application may further include: a hydrogen sulfide meter 6 for detecting the hydrogen sulfide content in the gas.
Wherein the outlet end of the gas pretreatment system 4 to be subjected to performance determination is connected to the hydrogen sulfide meter 6, and the hydrogen sulfide meter 6 is located on different connection branches from the second membrane filter 31 and the dryer 32.
Since the gas to be pretreated does not necessarily contain hydrogen sulfide, unlike the second membrane filter 31 and the dryer 32, the hydrogen sulfide meter 6 is not a component which must be disposed in the apparatus, and thus the hydrogen sulfide meter 6 and the second membrane filter 31 and the dryer 32 may be disposed on different connection branches.
Further, in order to determine the sulfur adsorption resistance efficiency of the gas pretreatment system 4 for which performance is to be determined, it can be calculated according to the following formula:
wherein: c is the sulfur-resistant adsorption efficiency, m s1 is the first hydrogen sulfide content measured after a period of time when the gas pretreatment system 4 with the performance to be determined is started, and m s2 is the second hydrogen sulfide content measured after a preset period of time. It is understood that the length of time of the period of time is less than the length of time of the preset time.
In one possible design, in order to continuously collect the gas pressure data at the outlet end of the gas pretreatment system 4 of which the performance is to be determined, referring to fig. 2, the online gas pretreatment system performance determining apparatus provided by the embodiment of the present application further includes: a pressure sensor 7.
Wherein the pressure sensor 7 is located between the outlet end of the gas pretreatment system 4 for which performance is to be determined and the second membrane filter 31 or the hydrogen sulfide meter 6.
Similarly, in order to continuously collect the gas temperature data of the outlet end of the gas pretreatment system 4 of which the performance is to be determined, referring to fig. 2, the online gas pretreatment system performance determining apparatus provided by the embodiment of the application further includes: a temperature sensor 8.
Wherein the temperature sensor 8 is located between the outlet end of the gas pretreatment system 4 for which performance is to be determined and the second membrane filter 31 or the hydrogen sulfide meter 6.
In one possible design, referring to fig. 2, the online gas pretreatment system performance determining apparatus provided in the embodiment of the present application further includes: a differential pressure gauge 9.
One end of the differential pressure gauge 9 is connected with the inlet end of the gas pretreatment system 4 with the performance to be determined, and the other end of the differential pressure gauge is connected with the outlet end of the gas pretreatment system 4 with the performance to be determined.
The pressure difference between the gas before and after passing through the gas pretreatment system 4 for which the performance is to be determined can be detected by the pressure difference meter 9. When a pressure difference exists, it can be determined whether the filter in the gas pretreatment system 4 whose performance is to be determined is in a normal operation state by the pressure difference. Once the pressure difference has increased to a certain reading and suddenly becomes zero, the filter membrane in the filter in the gas pretreatment system 4 indicating the property to be determined breaks down, and the magnitude of the depressurization valve 5 can be determined from the pressure difference.
In one possible design, referring to fig. 2, the device for determining the performance of the online gas pretreatment system according to the embodiment of the present application further includes at least one stop valve 10 for controlling the on-off of the gas in the pipeline.
For example, referring to fig. 2, the on-line performance determining apparatus for a gas pretreatment system according to the embodiment of the present application includes five stop valves 10, wherein one stop valve 10 is located between an inlet end of the gas pretreatment system 4 to be determined and a differential pressure meter 9, one stop valve 10 is located between an outlet end of the gas pretreatment system 4 to be determined and the differential pressure meter 9, one stop valve 10 is located between an outlet end of the gas pretreatment system 4 to be determined and a pressure sensor 7, one stop valve 10 is located between a temperature sensor 8 and a second membrane filter 31, and one stop valve 10 is located between the temperature sensor 8 and a hydrogen sulfide meter 6.
On the other hand, the embodiment of the application also provides a performance determining method adopting the performance determining device of the online gas pretreatment system, and referring to fig. 3, the performance determining method comprises the following steps:
step 301, a first mass of a first membrane filter and/or a first mass of an atomizer, a first mass of a second membrane filter 31, and a first mass of a dryer 32 with particulate matter prior to testing is obtained.
The pre-test mass of the first membrane filter or atomizer, the second membrane filter 31 and the dryer 32 can be obtained by weighing the load.
Step 302, the gas cylinder 1 containing the gas at the preset pressure is opened, the gas pretreatment system 4 of the property to be determined is started, and the preset time is continued.
Step 303, obtaining a second mass of the first membrane filter and/or a second mass of the atomizer, a second mass of the second membrane filter 31, and a second mass of the dryer 32 after a preset time.
The mass of the first membrane filter, the second membrane filter 31 and the dryer 32 after a preset time to start the gas pretreatment system 4 for the property to be determined can be obtained by weighing the weight bearing.
Step 304, obtaining the particulate matter filtering efficiency and/or the aerosol filtering efficiency of the gas pretreatment system 4 with the performance to be determined according to the first mass of the first membrane filter with the particulate matter and/or the first mass of the atomizer, the first mass of the second membrane filter 31, the first mass of the dryer 32, the second mass of the first membrane filter with the particulate matter and/or the second mass of the atomizer, the second mass of the second membrane filter 31 and the second mass of the dryer 32.
The particulate matter filtering efficiency can be obtained according to the following formula:
Wherein A is the filtration efficiency of particulate matter; Δm is the difference between the first mass of the first membrane filter and the second mass of the first membrane filter in g; Δm is the difference between the first mass of the second membrane filter 31 and the second mass of the second membrane filter 31 in g.
The aerosol filtration efficiency can be obtained according to the following formula:
Wherein B is the filtration efficiency of the aerosol; Δm is the difference between the first mass of the first membrane filter and the second mass of the first membrane filter in g; Δm is the difference between the first mass of the second membrane filter 31 and the second mass of the second membrane filter 31 in g; ΔM Dryer is the difference between the first mass of dryer 32 and the second mass of dryer 32, in g.
According to the performance determining method adopting the online gas pretreatment system performance determining device provided by the embodiment of the application, the particulate matter filtering efficiency and/or the aerosol filtering efficiency of the gas pretreatment system 4 with the performance to be determined is obtained by acquiring the first mass of the first membrane filter and/or the first mass of the first atomizer, the first mass of the second membrane filter 31 and the first mass of the dryer 32 before the test is performed, and the acquired second mass of the first membrane filter and/or the second mass of the first atomizer after the gas pretreatment system 4 with the performance to be determined is started for a preset time by starting the gas cylinder with the gas with the preset pressure, and the particulate matter filtering efficiency and/or the aerosol filtering efficiency of the gas pretreatment system is used as the basis to determine the performance of the gas pretreatment system. Due to the adoption of the performance determining device of the online gas pretreatment system, the method does not need to use power electricity, so that explosion accidents possibly caused by electricity consumption are avoided, and the existing potential safety hazard is eliminated.
Examples:
Taking a gas pretreatment system purchased in a natural gas purification plant as an example, the product gas is natural gas containing hydrogen sulfide, and the performance of the gas pretreatment system is determined by using the online gas pretreatment system performance determining device provided by the embodiment of the application.
The performance requirements for the gas pretreatment system are: the pretreated natural gas does not contain liquid water, solid particles with the particle size larger than 0.1 micron and the pressure is 0.2+/-0.03 MPa, so that the pore diameter of a filter membrane in the first membrane filter is 0.5 micron, the pore diameter of a filter membrane in the second membrane filter 31 is 0.1 micron, and the particles of the first membrane filter are SiO 2 powder with the particle size of 0.2 micron.
(1) Particulate matter filtration efficiency and pressure control evaluation
Weighing 5.110g of the first membrane filter before the test, and 5.050g of the second membrane filter 31;
Opening a gas bottle 1 of natural gas standard gas containing hydrogen sulfide, regulating a pressure reducing valve 5 to a pipeline pressure of 0.5MPa, opening a stop valve 10 positioned between an inlet end of a gas pretreatment system 4 with performance to be determined and a differential pressure meter 9, a stop valve 10 positioned between an outlet end of the gas pretreatment system 4 with performance to be determined and the differential pressure meter 9, a stop valve 10 positioned between an outlet end of the gas pretreatment system 4 with performance to be determined and a pressure sensor 7 and between a temperature sensor 8 and a second membrane filter 31, closing the stop valve 10 positioned between the temperature sensor 8 and a hydrogen sulfide tester 6, regulating a pressure stabilizing valve in the gas pretreatment system 4 with performance to be determined to an outlet pressure of 0.2MPa, and purging for 2 hours;
Recording the degree change of the pressure sensor 7 to be 0.2+/-0.01 MPa, and indicating that the gas pressure stability meets the requirement;
After purging, the first membrane filter was taken down, the mass thereof was 5.045 g, the mass change Δm of the first membrane filter was 0.065 g, and the second membrane filter 31 was taken down, the mass thereof was 5.050 g, the mass change Δm of the second membrane filter 31 was 0g, and the particulate matter filtration efficiency was calculated to be 100%.
(2) Evaluation of Water mist filtration Performance
Before the test, a certain amount of water is added into the atomizer, the mass of the atomizer is 71.025 g, the mass of the second membrane filter 31 is 5.050 g, and the mass of the dryer 32 is 10.041 g;
Opening a gas bottle 1 of natural gas standard gas containing hydrogen sulfide, regulating a pressure reducing valve 5 to a pipeline pressure of 0.5MPa, opening a stop valve 10 positioned between an inlet end of a gas pretreatment system 4 with performance to be determined and a differential pressure meter 9, a stop valve 10 positioned between an outlet end of the gas pretreatment system 4 with performance to be determined and the differential pressure meter 9, a stop valve 10 positioned between an outlet end of the gas pretreatment system 4 with performance to be determined and a pressure sensor 7 and between a temperature sensor 8 and a second membrane filter 31, closing the stop valve 10 positioned between the temperature sensor 8 and a hydrogen sulfide tester 6, regulating a pressure stabilizing valve in the gas pretreatment system 4 with performance to be determined to an outlet pressure of 0.2MPa, and purging for 10 minutes;
After the purging is completed, taking down the atomizer, namely the mass of the atomizer is 71.013 g, wherein the mass change delta M of the atomizer is 0.012 g, taking down the second membrane filter 31 and the dryer 32, weighing the mass of the second membrane filter 31 to be 5.050 g, weighing the mass of the dryer 32 to be 10.045 g, wherein the mass change delta M of the second membrane filter 31 is 0g, the mass change delta M Dryer of the dryer 32 is 0.004 g, and calculating to obtain the water mist filtering efficiency to be 100%;
(3) Evaluation of Sulfur adsorption resistance
The hydrogen sulfide standard gas with the hydrogen sulfide content of 10PPm is adopted in the gas cylinder 1, and is connected into an online gas pretreatment system performance determining device, a pressure stabilizing valve in a gas pretreatment system 4 with the performance to be determined is regulated to an outlet pressure of 0.2MPa, and the gas is purged for 30min;
after the purging was completed, the content of hydrogen sulfide was measured to be 10PPm at the outlet, and the sulfur-resistant adsorption efficiency was 100%.
In summary, the gas pretreatment system purchased by a certain natural gas purification plant meets the requirements and has qualified performance.
In the present disclosure, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. The specification and examples are to be regarded in an illustrative manner only.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (7)
1. An on-line gas pretreatment system performance determining apparatus, the determining apparatus comprising: a gas cylinder (1) containing gas with preset pressure, an impurity adding device (2), an impurity collecting device (3), a pressure reducing valve (5) and a pressure difference meter (9), wherein the preset pressure is larger than atmospheric pressure,
The impurity adding device (2) comprises a first membrane filter and an atomizer, wherein the first membrane filter and the atomizer are provided with particles, the gas cylinder (1) containing the preset pressure gas, the impurity adding device (2) and the inlet end of the gas pretreatment system (4) with the performance to be determined are sequentially connected, and the particles are positioned at one side close to the gas cylinder (1) containing the preset pressure gas;
the impurity collecting device (3) comprises a second membrane filter (31) and a dryer (32), wherein the outlet end of the gas pretreatment system (4) with the performance to be determined, the second membrane filter (31) and the dryer (32) are sequentially connected, and the performance of the gas pretreatment system (4) is judged according to the particulate matter filtering efficiency and/or the aerosol filtering efficiency;
the pressure reducing valve (5) is positioned between the gas cylinder (1) containing the gas with preset pressure and the impurity adding device (2);
One end of the pressure difference meter (9) is connected with the inlet end of the gas pretreatment system (4) with the performance to be determined, the other end of the pressure difference meter is connected with the outlet end of the gas pretreatment system (4) with the performance to be determined, the pressure difference meter (9) is used for detecting the pressure difference of gas before and after passing through the gas pretreatment system (4) with the performance to be determined, and whether a filter in the gas pretreatment system (4) with the performance to be determined is in a normal state is determined through the pressure difference; when the pressure difference suddenly becomes zero after a certain reading, the filter membrane in the filter is broken down, and the decompression amplitude of the decompression valve (5) is determined according to the pressure difference.
2. The on-line gas pretreatment system performance determining apparatus according to claim 1, wherein the pore size of the filter membrane in the first membrane filter is larger than the pore size of the filter membrane in the second membrane filter (31).
3. The on-line gas pretreatment system performance determining apparatus of claim 1, wherein the dryer (32) is a micro-drying tube added with a desiccant, wherein the desiccant is one of silica gel, molecular sieve, or phosphorus pentoxide.
4. The on-line gas pretreatment system performance determining apparatus of claim 1, wherein the determining apparatus further comprises: a hydrogen sulfide measuring instrument (6),
The outlet end of the gas pretreatment system (4) with the performance to be determined is connected with the hydrogen sulfide measuring instrument (6), and the hydrogen sulfide measuring instrument (6) is positioned on different connecting branches with the second membrane filter (31) and the dryer (32).
5. The on-line gas pretreatment system performance determination device of claim 4, further comprising: -a pressure sensor (7), said pressure sensor (7) being located between the outlet end of the gas pretreatment system (4) for which the performance is to be determined and the second membrane filter (31) or the hydrogen sulfide meter (6).
6. The on-line gas pretreatment system performance determination device of claim 4, further comprising: a temperature sensor (8),
The temperature sensor (8) is located between the outlet end of the gas pretreatment system (4) for which the performance is to be determined and the second membrane filter (31) or the hydrogen sulfide meter (6).
7. A performance determining method employing the in-line gas pretreatment system performance determining apparatus according to any one of claims 1 to 6, wherein the performance determining method comprises:
Acquiring a first mass of a first membrane filter and a first mass of an atomizer, a first mass of a second membrane filter (31) and a first mass of a dryer (32) with particulate matter before the test;
starting a gas cylinder (1) containing gas with preset pressure, starting a gas pretreatment system (4) with performance to be determined, and continuously presetting time;
acquiring a second mass of the first membrane filter with particulate matter and a second mass of the atomizer, a second mass of a second membrane filter (31) and a second mass of a dryer (32) after the preset time;
The particulate matter filtering efficiency and/or the aerosol filtering efficiency of the gas pretreatment system (4) for which the performance is to be determined is obtained from the first mass of the first membrane filter with particulate matter and the first mass of the atomizer, the first mass of the second membrane filter (31), the first mass of the dryer (32), the second mass of the first membrane filter with particulate matter and the second mass of the atomizer, the second mass of the second membrane filter (31), and the second mass of the dryer (32).
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