CN112213158A - Sampling pretreatment device and method for laser gas analyzer - Google Patents
Sampling pretreatment device and method for laser gas analyzer Download PDFInfo
- Publication number
- CN112213158A CN112213158A CN202011042095.5A CN202011042095A CN112213158A CN 112213158 A CN112213158 A CN 112213158A CN 202011042095 A CN202011042095 A CN 202011042095A CN 112213158 A CN112213158 A CN 112213158A
- Authority
- CN
- China
- Prior art keywords
- gas
- sampling
- module
- electromagnetic valve
- sample gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a sampling pretreatment device and a method of a laser gas analyzer, belonging to the technical field of on-line analysis cabinet meter measurement, wherein the device comprises an analysis cabinet, the analysis cabinet comprises a sampling module, a pretreatment module, a control module and a gas analysis module, wherein the sampling module is used for collecting sample gas, the control module is used for controlling the device to carry out gas analysis or back flushing cleaning, the pretreatment module is used for filtering impurities in the sample gas, and the gas analysis module is used for carrying out gas analysis on the sample gas; the method comprises the steps that firstly, a sampling module collects sample gas and transmits the sample gas to a pretreatment module through a sample gas pipeline, then the pretreatment module filters impurities in the sample gas, then the filtered sample gas is transmitted to a gas analysis module for gas analysis, and a control module controls the device to alternately perform sampling analysis and back flushing cleaning; the invention solves the problem that dry sampling is difficult when the coke oven gas contains a large amount of high-viscosity and easily-crystallized substances such as dust, tar, naphthalene and the like.
Description
Technical Field
The invention belongs to the technical field of on-line analysis cabinet meter measurement, and particularly relates to a sampling pretreatment device and method for a laser gas analyzer.
Background
A large amount of fuel gas byproducts are generated in metallurgical enterprises, mainly comprising blast furnace gas, converter gas and coke oven gas, and the efficient utilization of the secondary energy sources is an important way for cost reduction and efficiency improvement of the enterprises. The heat value of the fuel gas is the most important quality index of the fuel gas, and the accurate detection of the heat value has important significance for scientific proportioning and effective utilization of the fuel gas. Inaccurate detection of the combustible gas heat value instrument is a well-known technical problem which is difficult to be wound around industries such as metallurgy, chemical engineering, electric power and the like for many years, and long-term use proves that the currently used combustion type heat value instrument cannot accurately realize online detection of the combustible gas heat value. The American Raman laser gas heat value analysis system adopts a new idea of realizing gas heat value detection by adopting a component method, can simultaneously detect the volume contents of components such as CO, CxHy, CO2, H2S, CH4, O2, H2, N2 and the like in gas within the response time of 1 second, and then calculates the heat value of the gas through a heat value calculation model. The laser gas heat value analysis system has great advantages by comprehensively considering cost performance and applicability indexes, but the coke oven gas contains more impurities which are difficult to purify, so the rigid surface micro-filtration principle of the traditional probe filter is easy to block. If a steam jet pump is adopted for sampling, steam is used as injection power and is mixed with sample gas, and the sample gas is sampled by a wet method, so that the sample gas cannot be accurately analyzed due to the influence of the water solubility of the sample gas. The technical problem to be solved urgently is how to carry out dry sampling on the occasion that the coke oven gas contains a large amount of high-viscosity and easily-crystallized substances such as dust, tar, naphthalene and the like.
Disclosure of Invention
The invention aims to: the device and the method for sampling and preprocessing the laser gas analyzer solve the problem of dry sampling when a large amount of high-viscosity and easily-crystallized substances such as dust, tar, naphthalene and the like are contained in coke oven gas.
In order to solve the technical problems, the technical scheme of the invention is as follows:
firstly, providing a sampling pretreatment device of a laser gas analyzer, which comprises an analysis cabinet, wherein the analysis cabinet comprises a sampling module, a pretreatment module, a control module and a gas analysis module, and one side of the analysis cabinet is provided with a purging nitrogen gas access port and a sample gas access port;
the control module comprises a controller, a sampling control electromagnetic valve and a back-blowing control electromagnetic valve, and the controller is used for respectively controlling the sampling control electromagnetic valve and the back-blowing control electromagnetic valve to be opened and closed;
the sampling module is provided with a collecting end and an output end, the collecting end is used for collecting the sample gas and outputting the sample gas to one side of the sample gas inlet through the output end, and the other side of the sample gas inlet is connected with the pretreatment module through a sampling control electromagnetic valve;
the pretreatment module comprises a filter tank, the filter tank is used for filtering impurities in the sample gas and conveying the filtered sample gas to the gas analysis module, a back-blowing gas inlet is formed in the upper part of the filter tank, and the back-blowing gas inlet is connected with a purging nitrogen inlet through a back-blowing control electromagnetic valve;
the gas analysis module is used for receiving the sample gas passing through the pretreatment module and carrying out gas analysis;
further, sampling module includes sampling probe, metal filters and heat tracing pipeline, and sampling probe one end is equipped with the groove of slope, and the groove is as gathering the end, and the other end meets with metal filters's one end, and metal filters's the other end is as the output, meets with sample gas access mouth through the sample gas pipeline, and the heat tracing pipeline is located the sampling probe and the metal filters outside.
Furthermore, the lower part of the filter tank is provided with a sample gas inlet and a drain outlet, the upper part of the filter tank is provided with a gas outlet, the sample gas inlet is used for receiving sample gas passing through the sampling control electromagnetic valve, the gas outlet is sequentially connected with an air pump, a compressor cooler and a high-precision filter, the high-precision filter is connected with a gas analysis module, the lower part of the analysis cabinet is also provided with a back-blowing drain outlet, and the drain outlet is connected with the back-blowing drain outlet through a drain pipeline.
Further, the control module is also provided with a pollution discharge control electromagnetic valve and a two-way electromagnetic valve, the controller respectively controls the on-off of the pollution discharge control electromagnetic valve and the two-way electromagnetic valve, the two-way electromagnetic valve is arranged between the filter tank and the air pump, and the pollution discharge control electromagnetic valve is arranged between the pollution discharge pipeline and the back-flushing sewage outlet.
Furthermore, a flexible medium filter element is arranged in the filter tank.
The invention also provides a sampling pretreatment method of the laser gas analyzer, which is applied to a sampling pretreatment device of the laser gas analyzer and comprises the following steps:
s1: a controller of the control module controls the sampling control electromagnetic valve and the two-way electromagnetic valve to be opened and the pollution discharge control electromagnetic valve and the back flushing control electromagnetic valve to be closed at a certain time period in a first period;
s2: the collection end of the sampling module collects the sample gas and transmits the collected sample gas to the pretreatment module;
s3: the pretreatment module receives the sample gas and filters impurities in the sample gas, and then the sample gas is conveyed to the gas analysis module;
s4: the gas analysis module receives the sample gas and carries out gas analysis;
s5: a controller of the control module controls the back flushing control electromagnetic valve to be switched on for 6 seconds and switched off for 4 seconds in the rest period of the first period, the pollution discharge control electromagnetic valve is opened, and the sampling control electromagnetic valve and the two-way electromagnetic valve are closed;
s6: introducing nitrogen into the purging nitrogen access port, and performing nitrogen back-flushing cleaning;
s7: the cycle is performed for a first period.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the control module in the device is provided with a controller, a sampling control electromagnetic valve and a back flushing control electromagnetic valve, wherein the controller controls the sampling control electromagnetic valve and the back flushing control electromagnetic valve to be opened and closed, and further controls the sample gas access port and the purging nitrogen gas access port to be opened and closed, so that the gas analysis and back flushing cleaning work can be automatically completed; and the timer is set to set the alternate opening and closing of the sampling control electromagnetic valve and the back flushing control electromagnetic valve, so that the device can automatically finish the alternate operation of gas analysis and back flushing cleaning. The working efficiency of the device is greatly improved, and the labor cost is saved.
2. The metal filter screen can filter dust and tar mist mixed in the sampling gas, so that pollutants in the sampling gas can be efficiently physically separated at the sampling port, a gas sampling pipeline is smooth, and continuous sampling is guaranteed.
3. The flexible medium filter element made of fluorine silicon arranged in the filter tank can remove all naphthalene oil and dust in the sampled gas, and the filter gap can be changed under the action of external force. When the ash is cleaned, the clearance of the filter medium is automatically enlarged under the action of the back-blowing air pressure, and simultaneously, the ash and naphthalene crystal blocks can be effectively crushed under the mechanical vibration generated by pulse back-blowing air flow, so that the adhesive force of naphthalene oil is reduced, the gas sampling pipeline is unblocked, and continuous sampling is ensured.
4. The compressor cooler can absorb residual moisture in the sampled gas, and the reduction of the moisture is beneficial to improving the calculation precision.
5. The high-precision filter can filter other trace substances, and is favorable for improving the calculation precision.
Drawings
FIG. 1 is a schematic diagram of an embodiment;
FIG. 2 is a schematic flow diagram of a laser gas analyzer sampling pre-processing method of the present invention;
in the drawings: 1-sampling probe, 2-metal filter screen, 3-heat tracing pipeline, 4-sample gas pipeline, 5-back blowing control electromagnetic valve V3, 6-purging nitrogen inlet, 7-filter tank, 8-sampling control electromagnetic valve V1, 9-sample gas inlet, 10-pollution discharge control electromagnetic valve V2, 11-back blowing pollution discharge outlet, 12-condensate discharge outlet, 13-floor drain, 14-flexible medium filter core, 15-small programmable controller, 16-analysis cabinet, 17-automatic condenser, 18-compressor cooler, 19-high precision filter, 20-five-way switching valve, 21-standard gas 2 inlet, 22-standard gas 1 inlet, 23-gas inlet, 24-rotor flow meter FL1, 25-rotor flow meter FL2, 26-laser gas calorific value analyzer, 27-analyzer tail gas evacuation interface, 28-three-way electromagnetic valve, 29-air pump, 30-two-way electromagnetic valve V4, 31-stop valve, 32-sampling module, 33-pretreatment module, 34-control module and 35-gas analysis module.
Detailed Description
The features and properties of the present invention are described in further detail below with reference to the accompanying drawings and examples.
The utility model provides a laser gas analysis appearance sample preprocessing device, includes analysis cabinet 16, and analysis cabinet 16 includes sampling module 32, preprocessing module 33, control module 34 and gas analysis module 35, and analysis cabinet 16 one side is equipped with sweeps nitrogen gas access 6 and appearance gas access 9.
The control module 34 includes a controller, a sampling control solenoid valve 8 and a back-blowing control solenoid valve 5, and the controller is configured to control the sampling control solenoid valve 8 and the back-blowing control solenoid valve 5 to open and close respectively.
The sampling module 32 is provided with a collecting end and an output end, the collecting end is used for collecting the sample gas and outputting the sample gas to one side of the sample gas inlet 9 through the output end, and the other side of the sample gas inlet 9 is connected with the preprocessing module 33 through the sampling control electromagnetic valve 8; the sample gas inlet 9 is controlled to open and close by the control electromagnetic valve 8, and the gas analysis work is further controlled.
The pretreatment module 33 comprises a filter tank 7, the filter tank 7 is used for filtering impurities in the sample gas and conveying the filtered sample gas to a gas analysis module 35, a back-flushing gas inlet is arranged at the upper part of the filter tank 7, and the back-flushing gas inlet is connected with a purging nitrogen inlet 6 through a back-flushing control electromagnetic valve 5; namely, the back flushing control electromagnetic valve 5 is used for controlling the opening and closing of the nitrogen purging inlet 6, so that the back flushing cleaning work is controlled.
The gas analysis module 35 is used for receiving the sample gas passing through the pretreatment module 33 and performing gas analysis.
In the above device, the sampling module 32 includes the sampling probe 1, the metal filter screen 2 and the heat tracing pipeline 3, one end of the sampling probe 1 is provided with the inclined kerf, the kerf is taken as the acquisition end, the other end is connected with one end of the metal filter screen 2, the other end of the metal filter screen 2 is taken as the output end and is connected with the sample gas inlet 9 through the sample gas pipeline 4, and the heat tracing pipeline 3 is arranged outside the sampling probe 1 and the metal filter screen 2. The metal filter screen can filter dust and tar mist mixed in the sampling gas, so that pollutants in the sampling gas can be efficiently physically separated at the sampling port, a gas sampling pipeline is smooth, and continuous sampling is guaranteed.
And, the inferior part of the filtering tank 7 has sample gas inlet port and drain outlet, the upper portion has gas outlets, the sample gas inlet port is used for receiving the sample gas through the electromagnetic valve 8 of the sampling control, the gas outlet connects with air pump 29, compressor cooler 18 and high-accuracy filter 19 sequentially, the high-accuracy filter 19 is connected with gas analysis module 35, the 16 inferior part of the analysis cabinet has blowback drain outlet 11, the drain outlet is connected with blowback drain outlet 11 through the blowdown pipeline. The compressor cooler can absorb residual moisture in the sampled gas, and the reduction of the moisture is beneficial to improving the calculation precision. The high-precision filter can filter other trace substances, and is favorable for improving the calculation precision.
Besides, the control module 34 is further provided with a blowdown control electromagnetic valve 10 and a two-way electromagnetic valve 30, the controller respectively controls the opening and closing of the blowdown control electromagnetic valve 10 and the two-way electromagnetic valve 30, the two-way electromagnetic valve 30 is arranged between the filter tank 7 and the air suction pump 29, and the blowdown control electromagnetic valve 10 is arranged between a blowdown pipeline and the blowback blowdown port 11. A flexible medium filter core (14) is arranged in the filter tank (7). The two-way electromagnetic valve 30 is used for closing a device for preventing the back side of nitrogen when carrying out back flushing cleaning work, protecting the air pump 29 and preventing a diaphragm of the air pump 29 from being damaged. The flexible medium filter element made of fluorine silicon arranged in the filter tank can remove all naphthalene oil and dust in the sampled gas, and the filter gap can be changed under the action of external force. When the ash is cleaned, the clearance of the filter medium is automatically enlarged under the action of the back-blowing air pressure, and simultaneously, the ash and naphthalene crystal blocks can be effectively crushed under the mechanical vibration generated by pulse back-blowing air flow, so that the adhesive force of naphthalene oil is reduced, the gas sampling pipeline is unblocked, and continuous sampling is ensured.
When the device is actually applied, two sets of pretreatment modules 33 are configured, namely, when one set of pretreatment module 33 carries out gas analysis work, the other set of pretreatment module opens back-flushing cleaning work, and the pretreatment and back-flushing cleaning of the two sets of devices are alternately carried out, so that the operating efficiency of the system is greatly improved.
As shown in fig. 2, a sampling pretreatment method for a laser gas analyzer, which uses a sampling pretreatment device for a laser gas analyzer, includes the following steps:
s1: the controller of the control module 34 controls the sampling control electromagnetic valve 8 and the two-way electromagnetic valve 30 to be opened and the pollution discharge control electromagnetic valve 10 and the back flushing control electromagnetic valve 5 to be closed at a certain time period in the first period;
s2: the collection end of the sampling module 32 collects the sample gas and transmits the collected sample gas to the pretreatment module 33;
s3: the pretreatment module 33 receives the sample gas and filters impurities therein, and then delivers the sample gas to the gas analysis module 35;
s4: the gas analysis module 35 receives the sample gas and performs gas analysis;
s5: the controller of the control module 34 controls the back flushing control electromagnetic valve 5 to be switched on for 6 seconds and switched off for 4 seconds in the rest period of the first period, the pollution discharge control electromagnetic valve 10 is switched on, and the sampling control electromagnetic valve 8 and the two-way electromagnetic valve 30 are switched off;
s6: introducing nitrogen into the purging nitrogen inlet 6, and performing nitrogen back-flushing cleaning;
s7: the cycle is performed for a first period.
Example 1
As shown in fig. 1, a sampling pretreatment device of a laser gas analyzer comprises a sampling probe 1, a metal filter screen 2, a heat tracing pipeline 3, a sample gas pipeline 4, a back-flushing control electromagnetic valve V3, a purging nitrogen inlet 6, a filter tank 7, a sampling control electromagnetic valve V1, a sample gas inlet 9, a blowdown control electromagnetic valve V2, a back-flushing blowdown outlet 11, a condensate outlet 12, a floor drain 13, a flexible medium filter core 14, a small programmable controller 15, an analysis cabinet 16, an automatic drainer 17, a compressor cooler 18, a high-precision filter 19, a five-way switching valve 20, a standard gas 2 inlet 21, a standard gas 1 inlet 22, a zero gas inlet 23, a rotor flow meter FL1, a rotor flow meter FL2, a laser gas calorific value analyzer 26, an analyzer tail gas emptying interface 27, a three-way electromagnetic valve 28, an air suction pump 29, a two-way electromagnetic valve V4, and a stop valve 31.
A connector is arranged on the analysis cabinet 16, the sampling probe 1 is connected with a sample gas pipeline 4 through an external metal filter screen 2, the sample gas pipeline 4 is connected with a sampling control electromagnetic valve V1 through a sample gas inlet 9, the outlet of the sampling control electromagnetic valve V1 is connected with the sample gas inlet of the filter tank 7, the sample gas outlet of the filter tank 7 is connected with a two-way electromagnetic valve 30 through a stop valve 31, the outlet of the two-way electromagnetic valve 30 is connected with the sample gas inlet of an air pump 29, the sample gas outlet of the air pump 29 is connected with the sample gas inlet of the compressor cooler 18 through a three-way electromagnetic valve 28, the sample gas outlet of the compressor cooler 18 is connected to the sample gas inlet of a high-precision filter 19, the sample gas outlet of the high-precision filter 19 is connected to the sample gas inlet of the five-way switching valve 20, the sample gas outlet of the five-way switching valve 20 is communicated to the laser gas calorific value analyzer 26 through a rotor flow meter FL 1.
The sample gas line 4 is connected to a sample control solenoid valve V1 through a sample gas inlet 9, and a sample control solenoid valve V1 is connected to a sample gas inlet at the lower part of the canister 7.
Moreover, a flexible medium filter element 14 made of fluorine silicon is arranged in the filter tank 7, and a blowback air inlet at the upper part of the filter tank 7 is connected with a blowback control electromagnetic valve V3. The sewage outlet at the bottom of the filter tank 7 is communicated with a sewage discharge pipeline through a sewage discharge control electromagnetic valve V2.
In addition, the compressor cooler 18 rapidly cools the sample gas to 2 ℃ (precision +/-0.1 ℃), moisture removed after cooling is discharged through the automatic condenser 17, sample distortion can be prevented through cooling (CO2 is easily dissolved in water), the accurate control of the cooling temperature is convenient for calculating the loss of CO2, and the analysis result is more accurate.
Further, the fine dust particles are removed by the high-precision filter 19 (filter precision 0.3um), the flow rate (and pressure) are adjusted by the rotameter 24, and the sample gas is made into a dust-free, water-free, flow-rate and pressure-stable gas, which is sent to the laser gas calorific value analyzer 26 for analysis.
In addition, the bypass branch of the rotameter 25 during pretreatment can accelerate the sample gas flow and reduce the analysis lag time. A five-way switching valve 20 is used to effect calibration gas switching. The sampling probe 1, the metal filter screen 2 and the sample gas pipeline 4 are externally provided with a heat-insulation heat tracing pipeline 3 for tracing, so that the risk of easy blockage of a sample gas treatment system is reduced.
0.4-0.6 MPa of nitrogen is introduced from the outside, the nitrogen is heated by a heating box, the heating box adopts constant temperature control, the temperature range is 90-100 ℃, the heated nitrogen is connected with a back-blowing control electromagnetic valve V3 in the analysis cabinet through a back-blowing nitrogen inlet 6, and the outlet of a back-blowing control electromagnetic valve V3 is connected with a back-blowing air inlet at the upper part of a filter tank 7 and is used as a back-blowing power source. The small programmable controller 15 controls the operation of the electromagnetic valves V1, V2, V3 and V4 to realize automatic alternate online sampling and timing back-flushing cleaning by nitrogen, and the nitrogen for purging is used after being heated to prevent the sampling probe from being blocked.
Two sets of sampling probes and a pretreatment device are configured, when one set of back-blowing cleaning is carried out, the other set of sampling probes and the pretreatment device are used for sampling, and the two sets of sampling probes and the pretreatment device are alternately carried out to keep the sampling continuity. The back-blowing control electromagnetic valve V3 is controlled to be switched on and off by a small programmable controller 15 to form pulse airflow, the pressure of back-blowing nitrogen is 0.6MPa, the temperature range is 90-100 ℃, the back-blowing control electromagnetic valve V3 is switched on for 6 seconds and switched off for 4 seconds, the back-blowing control electromagnetic valve V3 is continuously switched on and off for 30 times, and 5 minutes of back-blowing are carried out totally.
The size length multiplied by the width multiplied by the depth of the box body of the analysis cabinet 16 is 1200 multiplied by 1900 multiplied by 600mm, 8 connecting ports are arranged on the analysis cabinet 16, and a purging nitrogen inlet 6, a sample gas inlet 9, a back flushing sewage outlet 11 and a condensate discharging port 12 are arranged on the left side. The right side is provided with a standard gas 2 access port 21, a standard gas 1 access port 22 and a zero gas access port 23. The top is provided with an analyzer tail gas evacuation interface 27.
This device is in the time of practical application: install the filter screen in the front end sampling pipeline, dust and tar fog that the filter screen can mix with in the filtering gas, appearance gas sends into the filter tank through sample control solenoid valve V1, the flexible medium filter core that the installation fluorine silicon material was made in the filter tank can get rid of all ashes in the sampling gas, solid particle crystallisates such as naphthalene, when the deashing, receive the effect of blowback atmospheric pressure, the automatic grow in filter medium clearance, the mechanical oscillation who produces at pulse blowback air current simultaneously, can effectively broken ash content, the naphthalene crystal block, reduce the adhesive force of naphthalene oil, make the gas sampling pipeline clean unblocked. After being purified by the filter tank, the sample gas is sent to a compressor cooler by an air pump for dehumidification (the sample gas is cooled to 2 ℃), then sent to a high-precision filter (the filter precision is less than or equal to 0.3um), and reaches the high-quality sample gas like the standard gas, and then enters a laser gas calorific value analyzer for dynamic real-time measurement after passing through a five-way switching valve and controlling the flow through a rotor flowmeter.
Claims (6)
1. A laser gas analyzer sampling preprocessing device, includes analysis cabinet (16), its characterized in that: the analysis cabinet (16) comprises a sampling module (32), a pretreatment module (33), a control module (34) and a gas analysis module (35), and one side of the analysis cabinet (16) is provided with a purging nitrogen inlet (6) and a sample gas inlet (9);
the control module (34) comprises a controller, a sampling control electromagnetic valve (8) and a back-blowing control electromagnetic valve (5), wherein the controller is provided with a timer for respectively controlling the sampling control electromagnetic valve (8) and the back-blowing control electromagnetic valve (5) to be opened and closed in a timing mode;
the sampling module (32) is provided with a collecting end and an output end, the collecting end is used for collecting the sample gas and outputting the sample gas to one side of the sample gas inlet (9) through the output end, and the other side of the sample gas inlet (9) is connected with the pretreatment module (33) through a sampling control electromagnetic valve (8);
the pretreatment module (33) comprises a filter tank (7), the filter tank (7) is used for filtering impurities in the sample gas and conveying the filtered sample gas to a gas analysis module (35), a back-flushing gas inlet is formed in the upper portion of the filter tank (7), and the back-flushing gas inlet is connected with the purging nitrogen inlet (6) through the back-flushing control electromagnetic valve (5);
the gas analysis module (35) is used for receiving the sample gas passing through the pretreatment module (33) and carrying out gas analysis.
2. The sampling pretreatment device of the laser gas analyzer according to claim 1, wherein: sampling module (32) are including sampling probe (1), metal filters (2) and heat tracing pipeline (3), sampling probe (1) one end is equipped with the groove of slope, the groove is as gathering the end, the other end with the one end of metal filters (2) meets, and the other end of metal filters (2) meets with sample gas access mouth (9) through sample gas pipeline (4) as the output, heat tracing pipeline (3) are located the sampling probe (1) and the metal filters (2) outside.
3. The sampling pretreatment device of the laser gas analyzer according to claim 1, wherein: filter jar (7) lower part and be equipped with sample gas inlet port and drain, upper portion is equipped with the gas outlet, the sample gas inlet port is used for receiving through the sample gas of sample control solenoid valve (8), the gas outlet has connected gradually aspiration pump (29), compressor cooler (18) and high accuracy filter (19), high accuracy filter (19) with gas analysis module (35) meet, analysis cabinet (16) lower part still is equipped with blowback drain (11), the drain pass through the sewage pipes with blowback drain (11) meet.
4. A laser gas analyzer sampling pretreatment device according to claim 3, characterized in that: the control module (34) is also provided with a pollution discharge control electromagnetic valve (10) and a two-way electromagnetic valve (30), the controller respectively controls the on and off of the pollution discharge control electromagnetic valve (10) and the two-way electromagnetic valve (30) in a timing mode, the two-way electromagnetic valve (30) is arranged between the filter tank (7) and the air pump (29), and the pollution discharge control electromagnetic valve (10) is arranged between the pollution discharge pipeline and the back-blowing sewage outlet (11).
5. The sampling pretreatment device of the laser gas analyzer according to claim 1, wherein: a flexible medium filter core (14) is arranged in the filter tank (7).
6. A sampling pretreatment method of a laser gas analyzer, which adopts the sampling pretreatment device of the laser gas analyzer as claimed in claims 1-5, characterized by comprising the following steps:
s1: a controller of the control module (34) controls the sampling control electromagnetic valve (8) and the two-way electromagnetic valve (30) to be opened and the pollution discharge control electromagnetic valve (10) and the back flushing control electromagnetic valve (5) to be closed at a certain time interval in a first period;
s2: the collection end of the sampling module (32) collects sample gas and transmits the collected sample gas to the pretreatment module (33);
s3: the pretreatment module (33) receives the sample gas, filters impurities in the sample gas and then conveys the sample gas to the gas analysis module (35);
s4: the gas analysis module (35) receives the sample gas and carries out gas analysis;
s5: a controller of the control module (34) controls the back flushing control electromagnetic valve (5) to be switched on for 6 seconds and switched off for 4 seconds in the rest period of the first period, the pollution discharge control electromagnetic valve (10) is opened, and the sampling control electromagnetic valve (8) and the two-way electromagnetic valve (30) are closed;
s6: introducing nitrogen into the purging nitrogen inlet (6) to perform nitrogen back-flushing cleaning;
s7: the cycle is performed for a first period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011042095.5A CN112213158A (en) | 2020-09-28 | 2020-09-28 | Sampling pretreatment device and method for laser gas analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011042095.5A CN112213158A (en) | 2020-09-28 | 2020-09-28 | Sampling pretreatment device and method for laser gas analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112213158A true CN112213158A (en) | 2021-01-12 |
Family
ID=74052244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011042095.5A Pending CN112213158A (en) | 2020-09-28 | 2020-09-28 | Sampling pretreatment device and method for laser gas analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112213158A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114002026A (en) * | 2021-11-10 | 2022-02-01 | 中船重工安谱（湖北）仪器有限公司 | Externally-hung gas sampling probe for vehicle-mounted gas detection instrument |
| CN113996129A (en) * | 2021-09-16 | 2022-02-01 | 金川集团股份有限公司 | Preposed treatment device for residual chlorine absorption outer discharge sample gas |
-
2020
- 2020-09-28 CN CN202011042095.5A patent/CN112213158A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113996129A (en) * | 2021-09-16 | 2022-02-01 | 金川集团股份有限公司 | Preposed treatment device for residual chlorine absorption outer discharge sample gas |
| CN114002026A (en) * | 2021-11-10 | 2022-02-01 | 中船重工安谱（湖北）仪器有限公司 | Externally-hung gas sampling probe for vehicle-mounted gas detection instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112213158A (en) | Sampling pretreatment device and method for laser gas analyzer | |
| CN202974730U (en) | Flue gas sampler with heating and back-blowing functions | |
| CN205538886U (en) | Online continuous monitor system of ultralow fume emission | |
| CN205280445U (en) | Flue gas sampling device | |
| CN213632850U (en) | Sampling pretreatment device of laser gas analyzer | |
| CN102279120B (en) | Device and method for gas sampling of pressurized fluidized bed | |
| JP2001208658A (en) | Device for removing tar from coal gas | |
| CN203385599U (en) | Gas analysis system for high-dust and high-water-content sample gas environment | |
| CN201413261Y (en) | Full-automatic industrial coke oven gas special sampling device | |
| CN207703559U (en) | A kind of selective-catalytic-reduction denitrified system entrance flue gas multi-point sampling device | |
| CN112649480A (en) | Desulfurization slurry pH monitoring system and monitoring method | |
| CN210198060U (en) | Furnace pressure monitoring device of high-temperature powder rotary kiln | |
| CN202119657U (en) | Device for gas sampling of pressurized fluidized bed | |
| CN204261502U (en) | A kind of blast furnace and coal gas of converter analyzer sample gas filter | |
| CN216646444U (en) | Boiler flue gas detection equipment | |
| CN201096664Y (en) | Fully automatic maintenance-free sampling pre-processing device | |
| CN201047813Y (en) | Sampling probe containing foreign gas | |
| CN216484200U (en) | Gas oxygen content analysis sampling pretreatment device for gas producer | |
| CN100562737C (en) | The sampling analysis device of tool powder filtering filtration function | |
| CN215339122U (en) | Sampling device applied to gas concentration measurement in circulating fluidized bed furnace | |
| JP3757898B2 (en) | Gas analyzer sampling device | |
| CN202275012U (en) | Pretreatment device for gas recovery analysis instrument | |
| CN207717172U (en) | A kind of aperture measurement of gas flow device | |
| CN209911068U (en) | Coke oven gas hydrogen sulfide on-line analysis pretreatment system | |
| CN210044954U (en) | Gas producer clean system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |