CN112525618A - Online sampling and purging method and device for mixed gas heat value instrument - Google Patents
Online sampling and purging method and device for mixed gas heat value instrument Download PDFInfo
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- CN112525618A CN112525618A CN202011105889.1A CN202011105889A CN112525618A CN 112525618 A CN112525618 A CN 112525618A CN 202011105889 A CN202011105889 A CN 202011105889A CN 112525618 A CN112525618 A CN 112525618A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0325—Control mechanisms therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0328—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid by purging the pipe with a gas or a mixture of gas and liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2226—Sampling from a closed space, e.g. food package, head space
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Abstract
The invention relates to an online sampling and purging method for a mixed gas heat value instrument, which comprises the following steps: the manual sampling button is switched on, the first sampling circuit is switched on, and the first sampling circuit is sampled; the analyzer analyzes and detects the sampling of the first sampling circuit; the manual steam purging button is switched on to purge the second sampling circuit; the manual nitrogen purging button is connected to purge the second sampling circuit; according to the invention, through the arrangement of the sampling button and the purging button, one sampling and one purging of two sampling circuits are realized, and through the arrangement of the steam system and the nitrogen system, the purging is carried out on the sampling circuits, so that the probability of sampling pipeline blockage is greatly reduced, the problems of low operation efficiency of a heat value meter and easy pipeline blockage are solved, and the waste of labor and time is avoided.
Description
Technical Field
The invention relates to the technical field of gas analysis, in particular to an online sampling and purging method and device for a mixed gas heat value instrument.
Background
In the steel industry, secondary energy sources such as converter gas, coke oven gas, blast furnace gas and the like are recycled, a converter gas cabinet, a coke oven gas cabinet and a blast furnace gas cabinet are arranged in a gas pressurizing station for storage, and the three kinds of gas are mixed and pressurized in proportion and then are conveyed to users. The mixed gas pipeline is provided with a gas heat value instrument for detecting the gas heat value, so that the reliable control of mixing adjustment and the stable gas heat value of a user are ensured. The gas heat value instrument consists of a sampling probe, a sampling pipeline, a pretreatment system and a heat value instrument host. At present, a complete set of domestic heat value analysis system works like this, sampling is performed by one-way sampling or two-way sampling, two-way sampling is taken as an example, one-way sampling is performed, the other-way sampling is performed, nitrogen purging is adopted, and due to the fact that coal gas recovered by industrial smelting contains different non-ideal impurity components such as dust, tar, naphthalene, hydrogen sulfide, moisture and other substances, the nitrogen purging effect is not ideal, the sampling probe filter element and the sampling pipeline are prone to scaling, pipeline blockage is caused, the sampling probe filter element and the sampling pipeline are not smooth, and the instrument cannot normally operate. The maintainer washes the sampling probe and crosses the filter core, dredge the waste time of sampling pipeline, hard, the instrument downtime is long, has influenced production.
Disclosure of Invention
The invention aims to provide an online sampling and purging method and device for a mixed gas heat value instrument, and aims to solve the problems that in the prior art, the heat value instrument is low in operation efficiency, a pipeline is easy to block, and manpower and working hours are avoided.
The technical purpose of the invention is realized by the following technical scheme:
an online sampling and purging method for a mixed gas heat value instrument comprises the following steps:
the manual sampling button is switched on, the first sampling circuit is switched on, and the first sampling circuit is sampled;
the analyzer analyzes and detects the sampling of the first sampling circuit;
the manual steam purging button is switched on to purge the second sampling circuit;
and the manual nitrogen purging button is switched on to purge the second sampling circuit.
In one embodiment, the manual sampling button is turned on, the first sampling circuit is turned on, and sampling the first sampling circuit includes:
the manual sampling button is switched on, and the first stainless steel steam electromagnetic valve is electrified and opened;
the first path and the second path of the first two-position three-way electromagnetic valve are electrically connected, the first path and the second path of the third two-position three-way electromagnetic valve are electrically connected, and the first path and the second path of the fifth two-position three-way electromagnetic valve are electrically connected;
the first sampling circuit is connected, and the first stainless steel filter element starts to sample.
In one embodiment, the manual steam purge button is on, and purging the second sampling circuit comprises:
the fourth stainless steel steam electromagnetic valve and the fifth stainless steel steam electromagnetic valve are powered on, and the fifth stainless steel steam electromagnetic valve is powered off after the steam system externally purges the second sampling probe filter element for two minutes;
the third stainless steel steam electromagnetic valve is electrified and connected, the first path and the third path of the second two-position three-way electromagnetic valve are connected, and after the steam system performs internal purging on the second sampling probe filter element for two minutes, the fifth stainless steel steam electromagnetic valve is electrified and opened;
after the steam system performs internal and external mixed blowing on the second sampling probe filter element for two minutes, the third stainless steel steam electromagnetic valve and the fifth stainless steel steam electromagnetic valve are disconnected in a power-off mode;
and after two seconds, the fourth stainless steel steam electromagnetic valve is powered off, the second two-position three-way electromagnetic valve is powered off, and the steam system is purged.
In one embodiment, the filter meshes of the first sampling probe filter core and the second sampling probe filter core are 625 meshes.
In one embodiment, the manual nitrogen purge button is turned on, and purging the second sampling circuit comprises:
the manual nitrogen purging button is switched on, the fourth stainless steel steam electromagnetic valve is electrically switched on, the first path and the third path of the fourth two-position three-way electromagnetic valve are electrically switched on, and the nitrogen system performs internal and external mixed purging on the second sampling probe filter element;
after purging for two minutes, the fourth stainless steel steam solenoid valve is powered off and disconnected, the first path and the third path of the fourth two-position three-way solenoid valve are powered off and the purging is completed.
In one embodiment, the manual nitrogen purge button is turned on, and the purging of the second sampling circuit further comprises:
the manual sampling button and the manual steam purging button are disconnected, an automatic purging mode is set, the first sampling circuit is sampled, and the second sampling circuit is purged.
In one embodiment, the setting the automatic purge mode includes:
setting a first sampling circuit to sample for one hour, and sampling a first sampling probe filter element for one hour;
and setting the second sampling circuit to automatically purge for eight minutes, and sampling the second sampling probe filter element for eight minutes.
In one embodiment, the sampling the second sampling probe candle for eight minutes comprises:
performing internal purging and external purging and internal and external combined purging on the second sampling probe filter element for two minutes through a steam system;
and performing internal and external combined purging on the second sampling probe filter element for two minutes through a nitrogen system.
In one embodiment, the manual sampling button is turned on, the first sampling circuit is turned on, and before sampling the first sampling circuit, the method further includes:
looking up a steam pressure gauge of the steam system, opening the first stop valve and the second stop valve in sequence,
checking a pipeline pressure gauge of the steam system, controlling the steam pressure to be 0.4-0.6 MPa, and ensuring that the drain valve discharges water;
and opening a nitrogen valve of the nitrogen system, checking a nitrogen pressure gauge, and controlling the nitrogen pressure to be 0.5-0.8 MPa.
An online sampling and purging device for a mixed gas heat value instrument is based on the online sampling and purging method for the mixed gas heat value instrument, and comprises the following steps: a first sampling circuit, a second sampling circuit, an analyzer system, a vapor system, and a nitrogen system; the first sampling circuit and the second sampling circuit are connected in parallel and then are respectively connected with the analyzer system, the steam system and the nitrogen system.
The invention has the beneficial effects that: according to the invention, through the arrangement of the sampling button and the purging button, one sampling and one purging of two sampling circuits are realized, and through the arrangement of the steam system and the nitrogen system, the purging is carried out on the sampling circuits, so that the probability of sampling pipeline blockage is greatly reduced, the problems of low operation efficiency of a heat value meter and easy pipeline blockage are solved, and the waste of labor and time is avoided.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic flow chart of the steps of an online sampling and purging method and device for a mixed gas calorific value instrument;
FIG. 2 is a schematic structural diagram of an online sampling and purging method and device for a mixed gas heat value instrument.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, an online sampling and purging method for a mixed gas heat value instrument includes:
100. the nitrogen system and the steam system were set up.
110. Looking up a steam pressure gauge of the steam system, opening the first stop valve and the second stop valve in sequence,
120. checking a pipeline pressure gauge of the steam system, controlling the steam pressure to be 0.4-0.6 MPa, and ensuring that the drain valve discharges water;
130. and opening a nitrogen valve of the nitrogen system, checking a nitrogen pressure gauge, and controlling the nitrogen pressure to be 0.5-0.8 MPa.
200. The manual sampling button is switched on, the first sampling circuit is switched on, and the first sampling circuit is sampled;
210. the manual sampling button is switched on, and the first stainless steel steam electromagnetic valve is electrified and opened;
220. the first path and the second path of the first two-position three-way electromagnetic valve are electrically connected, the first path and the second path of the third two-position three-way electromagnetic valve are electrically connected, and the first path and the second path of the fifth two-position three-way electromagnetic valve are electrically connected;
230. the first sampling circuit is connected, and the first stainless steel filter element starts to sample.
300. The analyzer analyzes and detects the sampling of the first sampling circuit;
400. the manual steam purging button is switched on to purge the second sampling circuit;
410. the fourth stainless steel steam electromagnetic valve and the fifth stainless steel steam electromagnetic valve are powered on, and the fifth stainless steel steam electromagnetic valve is powered off after the steam system externally purges the second sampling probe filter element for two minutes;
420. the third stainless steel steam electromagnetic valve is electrified and connected, the first path and the third path of the second two-position three-way electromagnetic valve are connected, and after the steam system performs internal purging on the second sampling probe filter element for two minutes, the fifth stainless steel steam electromagnetic valve is electrified and opened;
430. after the steam system performs internal and external mixed blowing on the second sampling probe filter element for two minutes, the third stainless steel steam electromagnetic valve and the fifth stainless steel steam electromagnetic valve are disconnected in a power-off mode;
440. and after two seconds, the fourth stainless steel steam electromagnetic valve is powered off, the second two-position three-way electromagnetic valve is powered off, and the steam system is purged.
After the second sampling probe filter element is subjected to steam blowing for 6 minutes, most of scale impurities attached to the filter element and the pipe wall are dissolved and fall off, and at the moment, nitrogen is used for blowing, so that water vapor is blown clean.
500. And the manual nitrogen purging button is switched on to purge the second sampling circuit.
510. The manual nitrogen purging button is switched on, the fourth stainless steel steam electromagnetic valve is electrically switched on, the first path and the third path of the fourth two-position three-way electromagnetic valve are electrically switched on, and the nitrogen system performs internal and external mixed purging on the second sampling probe filter element;
520. after purging for two minutes, the fourth stainless steel steam solenoid valve is powered off and disconnected, the first path and the third path of the fourth two-position three-way solenoid valve are powered off and the purging is completed.
600. The manual sampling button and the manual steam purging button are disconnected, an automatic purging mode is set, the first sampling circuit is sampled, and the second sampling circuit is purged.
In an embodiment of the present invention, the setting of the automatic purge mode includes:
610. setting a first sampling circuit to sample for one hour, and sampling a first sampling probe filter element for one hour;
620. and setting the second sampling circuit to automatically purge for eight minutes, and sampling the second sampling probe filter element for eight minutes.
In an embodiment of the present invention, the sampling the second sampling probe filter element for eight minutes includes:
621. performing internal purging and external purging and internal and external combined purging on the second sampling probe filter element for two minutes through a steam system;
622. and performing internal and external combined purging on the second sampling probe filter element for two minutes through a nitrogen system.
After the second sampling probe filter element is subjected to steam blowing for 6 minutes, most of scale impurities attached to the filter element and the pipe wall are dissolved and fall off, and at the moment, nitrogen is used for blowing, so that water vapor is blown clean.
In the embodiment of the invention, a first path of a first stainless steel steam electromagnetic valve and a first path of a fourth stainless steel steam electromagnetic valve are connected with a process mixed gas pipeline; the volume of the process mixed gas pipeline is 0.3m3And the working pressure is 0.8-7 MPa.
In the embodiment of the invention, the steam pressure is controlled to be 0.4-0.6 MPa, and the nitrogen pressure is controlled to be 0.5-0.8 MPa.
In the embodiment of the invention, the filter meshes of the first sampling probe filter core and the second sampling probe filter core are both 625 meshes.
In the embodiment of the invention, the pipe diameter of the first stainless steel steam electromagnetic valve and the pipe diameter of the fourth stainless steel steam electromagnetic valve are DN50 mm.
In the embodiment of the invention, the pipe diameters of the second stainless steel steam electromagnetic valve, the third stainless steel steam electromagnetic valve and the fifth stainless steel steam electromagnetic valve are DN20 mm.
In the embodiment of the invention, the pipe diameters of the first two-position three-way electromagnetic valve, the second two-position three-way electromagnetic valve, the third two-position three-way electromagnetic valve, the fourth two-position three-way electromagnetic valve and the fifth two-position three-way electromagnetic valve are DN15 mm.
The invention adopts steam and nitrogen as the purging gas source, and the internal, external and combined purging and the control of the purging time can realize the effective removal of tar and naphthalene scaling impurities existing on the wall of the sampling probe filter and the sampling pipeline, thereby reducing a large amount of manpower and materials. By using the special purging device and controlling the purging mode and the purging time, the filter element of the sampling probe needs to be detached, and descaling and cleaning are carried out or a new filter element is replaced every half month or even one week originally, so that the service efficiency of a heat value instrument is influenced, certain influence is brought to the gas operation regulation, and certain influence is brought to the settlement of supply and demand users; by adopting the invention, after the project is implemented, the blocking probability is greatly reduced, the operating efficiency of the heat value instrument is greatly improved, benefits are brought to enterprises invisibly, and the labor cost and the material consumption are also reduced.
In order to achieve the above object, referring to fig. 2, the present invention further provides an online sampling and purging device for a mixed gas heat value instrument, based on the above online sampling and purging method for a mixed gas heat value instrument, including: a process mixed gas pipeline 26, a first sampling circuit, a second sampling circuit, an analyzer system, a steam system and a nitrogen system; the first sampling circuit and the second sampling circuit are connected in parallel and then are respectively connected with the analyzer system, the steam system and the nitrogen system.
In the embodiment of the invention, the first sampling circuit comprises a first sampling probe filter element, a first stainless steel steam electromagnetic valve 1, a second stainless steel steam electromagnetic valve 2, a first two-position three-way electromagnetic valve 6 and a third two-position three-way electromagnetic valve 8; the second sampling circuit comprises a second sampling probe filter element, a fourth stainless steel steam electromagnetic valve 4, a fifth stainless steel steam electromagnetic valve 5, a second two-position three-way electromagnetic valve 7 and a fourth two-position three-way electromagnetic valve 9; the steam system comprises a third stainless steel steam electromagnetic valve 3, a steam pressure gauge 15, a steam gas storage tank 22, a first stainless steel stop valve 11, a second stainless steel stop valve 12, a pipeline pressure gauge 16 and a drain valve 13; the analyzer system comprises a heat value meter analyzer 24 and a fifth two-position three-way electromagnetic valve 10; the nitrogen system comprises a nitrogen pressure gauge 17 and a third stainless steel shut-off valve 14.
In an embodiment of the present invention, the first sampling probe candle includes a first sampling probe 18 and a first stainless steel candle 20; the second sampling probe filter element comprises a second sampling probe 19 and a second stainless steel filter element 21.
In the embodiment of the present invention, an insulation cotton layer 23 is disposed inside the steam storage tank 22.
In the embodiment of the present invention, the first path of the first stainless steel steam solenoid valve 1 and the first path of the fourth stainless steel steam solenoid valve 4 are connected to the process mixed gas pipeline 26; the second path of the first stainless steel steam electromagnetic valve 1, the first path of the second stainless steel steam electromagnetic valve 2 and the first path of the first two-position three-way electromagnetic valve 6 are connected with the first stainless steel filter element 20; the second path of the fourth stainless steel steam electromagnetic valve 4, the first path of the fifth stainless steel steam electromagnetic valve 5 and the first path of the second two-position three-way electromagnetic valve 7 are connected with the first stainless steel filter element 20; the second path of the second stainless steel steam electromagnetic valve 2 is respectively connected with the second path of the fifth stainless steel steam electromagnetic valve 5, the first path of the third stainless steel steam electromagnetic valve 3, the steam pressure gauge 15 and the first path of the first stainless steel stop valve 11; the second path of the third stainless steel steam electromagnetic valve 3 is connected with the third path of the first two-position three-way electromagnetic valve 6 and the third path of the second two-position three-way electromagnetic valve 7; the second path of the first two-position three-way electromagnetic valve 6 is connected with the first path of the third two-position three-way electromagnetic valve 8, and the second path of the third two-position three-way electromagnetic valve 8 is connected with the first path of the fifth two-position three-way electromagnetic valve 10; a second path of the second two-position three-way electromagnetic valve 7 is connected with a first path of the fourth two-position three-way electromagnetic valve 9, a second path of the fourth two-position three-way electromagnetic valve 9 is connected with a second path of the fifth two-position three-way electromagnetic valve 10, and a third path of the fifth two-position three-way electromagnetic valve 10 is connected with a heat value instrument analysis meter 24; a third path of the fourth two-position three-way electromagnetic valve 9 is respectively connected with a nitrogen pressure gauge 17 and a first path of the third stainless steel stop valve 14, and a second path of the third stainless steel stop valve 14 is connected with a nitrogen inlet channel; the second path of the first stainless steel stop valve 11 is connected with a steam storage tank 22, and the first path of the second stainless steel stop valve 12 and the first path of the drain valve 13 are connected with the steam storage tank 22; the second path of the second stainless steel stop valve 12 is connected with a pipeline pressure gauge and a steam channel; the second way of the trap 13 is connected to the trap channel.
In the embodiment of the invention, a first path of a first stainless steel steam electromagnetic valve and a first path of a fourth stainless steel steam electromagnetic valve are connected with a process mixed gas pipeline; the volume of the process mixed gas pipeline is 0.3m3, and the working pressure is 0.8-7 MPa.
In the embodiment of the invention, the steam pressure is controlled to be 0.4-0.6 MPa, and the nitrogen pressure is controlled to be 0.5-0.8 MPa.
In the embodiment of the invention, the filter meshes of the first sampling probe filter core and the second sampling probe filter core are both 625 meshes.
In the embodiment of the invention, the pipe diameter of the first stainless steel steam electromagnetic valve and the pipe diameter of the fourth stainless steel steam electromagnetic valve are DN50 mm.
In the embodiment of the invention, the pipe diameters of the second stainless steel steam electromagnetic valve, the third stainless steel steam electromagnetic valve and the fifth stainless steel steam electromagnetic valve are DN20 mm.
In the embodiment of the invention, the pipe diameters of the first two-position three-way electromagnetic valve, the second two-position three-way electromagnetic valve, the third two-position three-way electromagnetic valve, the fourth two-position three-way electromagnetic valve and the fifth two-position three-way electromagnetic valve are DN15 mm.
The principle of the invention is based on that steam is firstly blown and then blown by nitrogen, and the change of an internal blowing mode, an external blowing mode and a combined blowing mode is adopted to control the blowing time, the invention can effectively remove the scaling impurities attached to a filter element of a sampling probe and a sampling pipeline, dredge the pipeline, utilize a field-mounted superheated steam pipeline and a nitrogen pipeline, lead the superheated steam pipeline and the nitrogen pipeline to the side of an analysis cabinet, and lead the impurities to the side of the analysis cabinet through the installation of the steam blowing pipeline, the nitrogen blowing pipeline, a steam gas storage tank, a drain valve, detection steam, a nitrogen pressure gauge, an electromagnetic. The sampling purging device has the advantages of convenient installation, simple operation, safety and reliability. The system has the greatest characteristics that steam and nitrogen are added into the system to purge, the purging time is adjusted and calculated, and the purging mode is adjusted, so that steam and nitrogen can be used for purging the sampling probe and the sampling pipeline automatically and manually, the probability of blockage of the sampling pipeline is greatly reduced, the technical problems that the heat value instrument is low in operation efficiency and the pipeline is easy to block are solved, and the waste of manpower and working hours is avoided.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. An online sampling purging method for a mixed gas heat value instrument is characterized by comprising the following steps: the method comprises the following steps:
the manual sampling button is switched on, the first sampling circuit is switched on, and the first sampling circuit is sampled;
the analyzer analyzes and detects the sampling of the first sampling circuit;
the manual steam purging button is switched on to purge the second sampling circuit;
and the manual nitrogen purging button is switched on to purge the second sampling circuit.
2. The online sampling and purging method for the mixed gas heat value instrument as recited in claim 1, wherein the online sampling and purging method comprises the following steps: the manual sampling button is connected, the first sampling circuit is connected, and sampling the first sampling circuit comprises:
the manual sampling button is switched on, and the first stainless steel steam electromagnetic valve is electrified and opened;
the first path and the second path of the first two-position three-way electromagnetic valve are electrically connected, the first path and the second path of the third two-position three-way electromagnetic valve are electrically connected, and the first path and the second path of the fifth two-position three-way electromagnetic valve are electrically connected;
the first sampling circuit is connected, and the first stainless steel filter element starts to sample.
3. The online sampling and purging method for the mixed gas heat value instrument as recited in claim 1, wherein the online sampling and purging method comprises the following steps: the manual steam purge button is turned on, purging the second sampling circuit comprises:
the fourth stainless steel steam electromagnetic valve and the fifth stainless steel steam electromagnetic valve are powered on, and the fifth stainless steel steam electromagnetic valve is powered off after the steam system externally purges the second sampling probe filter element for two minutes;
the third stainless steel steam electromagnetic valve is electrified and connected, the first path and the third path of the second two-position three-way electromagnetic valve are connected, and after the steam system performs internal purging on the second sampling probe filter element for two minutes, the fifth stainless steel steam electromagnetic valve is electrified and opened;
after the steam system performs internal and external mixed blowing on the second sampling probe filter element for two minutes, the third stainless steel steam electromagnetic valve and the fifth stainless steel steam electromagnetic valve are disconnected in a power-off mode;
and after two seconds, the fourth stainless steel steam electromagnetic valve is powered off, the second two-position three-way electromagnetic valve is powered off, and the steam system is purged.
4. The online sampling and purging method for the mixed gas heat value instrument as recited in any one of claims 2 or 3, wherein the online sampling and purging method comprises the following steps: the filter mesh number of the first sampling probe filter element and the second sampling probe filter element is 625 meshes.
5. The online sampling and purging method for the mixed gas heat value instrument as recited in claim 1, wherein the online sampling and purging method comprises the following steps: the manual nitrogen gas sweeps the button switch-on, sweeps the second sample circuit and includes:
the manual nitrogen purging button is switched on, the fourth stainless steel steam electromagnetic valve is electrically switched on, the first path and the third path of the fourth two-position three-way electromagnetic valve are electrically switched on, and the nitrogen system performs internal and external mixed purging on the second sampling probe filter element;
after purging for two minutes, the fourth stainless steel steam solenoid valve is powered off and disconnected, the first path and the third path of the fourth two-position three-way solenoid valve are powered off and the purging is completed.
6. The online sampling and purging method for the mixed gas heat value instrument as recited in claim 1, wherein the online sampling and purging method comprises the following steps: the manual nitrogen purging button is connected, and the second sampling circuit is purged and then comprises:
the manual sampling button and the manual steam purging button are disconnected, an automatic purging mode is set, the first sampling circuit is sampled, and the second sampling circuit is purged.
7. The online sampling purging method for the mixed gas heat value instrument as recited in claim 6, wherein the online sampling purging method comprises the following steps: the setting the automatic purge mode includes:
setting a first sampling circuit to sample for one hour, and sampling a first sampling probe filter element for one hour;
and setting the second sampling circuit to automatically purge for eight minutes, and sampling the second sampling probe filter element for eight minutes.
8. The online sampling purging method for the mixed gas heat value instrument as recited in claim 7, wherein the online sampling purging method comprises the following steps: the eight minutes of taking a sample to second sampling probe filter core includes:
performing internal purging and external purging and internal and external combined purging on the second sampling probe filter element for two minutes through a steam system;
and performing internal and external combined purging on the second sampling probe filter element for two minutes through a nitrogen system.
9. The online sampling and purging method for the mixed gas heat value instrument as recited in claim 1, wherein the online sampling and purging method comprises the following steps: the manual sampling button is connected, the first sampling circuit is connected, and the manual sampling button further comprises the following steps before sampling the first sampling circuit:
looking up a steam pressure gauge of the steam system, opening the first stop valve and the second stop valve in sequence,
checking a pipeline pressure gauge of the steam system, controlling the steam pressure to be 0.4-0.6 MPa, and ensuring that the drain valve discharges water;
and opening a nitrogen valve of the nitrogen system, checking a nitrogen pressure gauge, and controlling the nitrogen pressure to be 0.5-0.8 MPa.
10. An online sampling and purging device for a mixed gas heat value instrument, which is characterized in that the online sampling and purging method for the mixed gas heat value instrument is based on any one of claims 1 to 9, and comprises the following steps: a first sampling circuit, a second sampling circuit, an analyzer system, a vapor system, and a nitrogen system; the first sampling circuit and the second sampling circuit are connected in parallel and then are respectively connected with the analyzer system, the steam system and the nitrogen system.
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| CN202011105889.1A CN112525618A (en) | 2020-10-15 | 2020-10-15 | Online sampling and purging method and device for mixed gas heat value instrument |
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| CN202011105889.1A CN112525618A (en) | 2020-10-15 | 2020-10-15 | Online sampling and purging method and device for mixed gas heat value instrument |
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| CN (1) | CN112525618A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354503A (en) * | 2021-12-27 | 2022-04-15 | 中冶焦耐(大连)工程技术有限公司 | Automatic maintenance-free gas oxygen content measuring system and method with real-time correcting function |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998151A (en) * | 2012-12-18 | 2013-03-27 | 中冶焦耐工程技术有限公司 | Automatic maintenance-free coke oven gas sampling system |
| CN203455213U (en) * | 2013-09-10 | 2014-02-26 | 武汉钢铁(集团)公司 | Preprocessing device of gas oxygen content analyzer |
| CN204882163U (en) * | 2015-06-10 | 2015-12-16 | 上海宝钢化工有限公司 | Coke oven gas continuous sampling preprocessing device |
| CN205246400U (en) * | 2015-12-21 | 2016-05-18 | 西克麦哈克（北京）仪器有限公司 | High -temperature gas sampling analysis system |
| CN207385026U (en) * | 2017-06-21 | 2018-05-22 | 上海昶艾电子科技有限公司 | For the mist of oil dust filtering device of sample gas |
| CN109633090A (en) * | 2018-12-20 | 2019-04-16 | 中冶焦耐(大连)工程技术有限公司 | A kind of full-automatic one drag two lime pulverized coal bin CO concentration measurement system and method |
| CN210863276U (en) * | 2019-07-01 | 2020-06-26 | 北京凯隆分析仪器有限公司 | Cracked gas sampling device |
-
2020
- 2020-10-15 CN CN202011105889.1A patent/CN112525618A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998151A (en) * | 2012-12-18 | 2013-03-27 | 中冶焦耐工程技术有限公司 | Automatic maintenance-free coke oven gas sampling system |
| CN203455213U (en) * | 2013-09-10 | 2014-02-26 | 武汉钢铁(集团)公司 | Preprocessing device of gas oxygen content analyzer |
| CN204882163U (en) * | 2015-06-10 | 2015-12-16 | 上海宝钢化工有限公司 | Coke oven gas continuous sampling preprocessing device |
| CN205246400U (en) * | 2015-12-21 | 2016-05-18 | 西克麦哈克（北京）仪器有限公司 | High -temperature gas sampling analysis system |
| CN207385026U (en) * | 2017-06-21 | 2018-05-22 | 上海昶艾电子科技有限公司 | For the mist of oil dust filtering device of sample gas |
| CN109633090A (en) * | 2018-12-20 | 2019-04-16 | 中冶焦耐(大连)工程技术有限公司 | A kind of full-automatic one drag two lime pulverized coal bin CO concentration measurement system and method |
| CN210863276U (en) * | 2019-07-01 | 2020-06-26 | 北京凯隆分析仪器有限公司 | Cracked gas sampling device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354503A (en) * | 2021-12-27 | 2022-04-15 | 中冶焦耐(大连)工程技术有限公司 | Automatic maintenance-free gas oxygen content measuring system and method with real-time correcting function |
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