CN212459108U - Tin smelting flue gas on-line analysis sample gas preprocessing device - Google Patents
Tin smelting flue gas on-line analysis sample gas preprocessing device Download PDFInfo
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- CN212459108U CN212459108U CN202021110546.XU CN202021110546U CN212459108U CN 212459108 U CN212459108 U CN 212459108U CN 202021110546 U CN202021110546 U CN 202021110546U CN 212459108 U CN212459108 U CN 212459108U
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Abstract
A pretreatment device for online analysis sample gas of tin smelting flue gas comprises a gas-liquid separation system, a heat exchange cooling dewatering system and a drying and filtering system; the gas-liquid separation system comprises a gas-liquid separator (1), a sample gas inlet pipe (2), a liquid discharge pipe (3) with an electromagnetic valve (4) and a liquid level switch (5); the heat exchange cooling water removal system comprises a vortex tube cooler (6), a compressed air tube (8) with a micro-regulating valve (9), a heat exchange cylinder (11) and a cold cavity (10) which are connected with the vortex tube cooler, a primary dryer (12) connected with the cold cavity, and a peristaltic pump (15) at the bottom of the cold cavity; the gas-liquid separator is connected with the cold cavity through a sample gas conveying pipe (14); the drying and filtering system comprises a secondary dryer (16) connected to the cold chamber by a conduit. The utility model discloses successfully solved the problem that moisture in the sample gas blockked up sample gas pipeline and corrosion analysis instrument, and simple structure, the operation is stable, and is energy-concerving and environment-protective.
Description
Technical Field
The utility model relates to a multicomponent gas condensation dewatering equipment and method technique, concretely relates to automatic dewatering equipment of tin smelting flue gas on-line analysis sample gas preliminary treatment.
Background
The multi-component gas generated by the tin smelting generator comprises SO2、CO、O2The real-time detection of the content of the sulfur in the whole production process is particularly important, and the sampling detection of the SO in the flue gas generated by the furnace body is realized2、CO、O2The content of the compound can timely reflect the combustion condition in the furnace; SO detection for chemical section in acid making process2、O2The content of (b) can be used to guide the adjustment of proportioning parameters; sampling and detecting SO for flue gas emission after desulfurization system treatment2The content can prevent the smoke emission from exceeding the standard. In the prior art, a multi-component gas analyzer is adopted to detect multi-component gas generated by a tin smelting producer on line in real time, if the gas analyzer stops working, the whole production process flow can be paralyzed and production is stopped, and a sample gas pretreatment system is a crucial link in the working of the multi-component gas analyzer and is related to the service life of a gas analysis core component.
The conventional method for sample gas pretreatment at present usually comprises the steps of taking out a sample gas to be detected through a sampling probe by using a sampling pump, carrying out condensation and dehydration on the sample gas after passing through a heat-preservation sampling tube and entering a compressor refrigerator, carrying out secondary drying on the sample gas by using a drying filter, sending the sample gas to an analysis instrument for analysis, and sending an analysis result to a control room by using a 4-20mA current signal. According to the analysis of the running condition of the gas analyzer, the gas condenser of the sample gas pretreatment system is in questionThe main reasons for the problems of the gas condenser are caused by the influences of factors such as a large amount of impurity components of a measured medium, complex working conditions, severe environment and the like and long-term turnover operation. Sample gas is direct to be carried out the condensation dewatering by sample pump bleed entering refrigerator condensation chamber, and the actual sampling in-process can be extracted steam condensation return water in the flue pipe together, leads to the intraductal hydrops of gas circuit too much, and the drainage peristaltic pump that gas condenser configured can't handle too much moisture far away, leads to the gas circuit to block up. In addition, excess moisture and SO in the sample gas2Fully react and form the acidizing fluid, the acidizing fluid gets into corrodes host computer in the gas circuit, the sampling pump, the acidizing fluid that spills over corrodes compression condenser again, because of the pipeline material among the compression condenser is copper, the copper pipe is corroded and is caused the refrigerant to leak and cause condensing system to become invalid, leads to gas analysis appearance paralyzed frequency from this to increase, not only leads to certain influence to whole production flow, has increased maintenance work volume and high amount consumptive material cost simultaneously, more seriously influences the operation environment, has very big potential safety hazard.
Disclosure of Invention
The utility model aims at solving the problem that above-mentioned prior art exists, provide a can replace traditional mode by compressor refrigeration appearance gas to can accomplish the device that is used for flue gas analysis's appearance gas preliminary treatment in succession, prevent that moisture in the flue gas from blockking up flue gas sampling pipeline and corrosion analysis instrument, ensure that online flue gas analysis appearance can carry out monitoring work in succession.
The purpose of the utility model is realized through the following technical scheme:
a pretreatment device for online analysis sample gas of tin smelting flue gas comprises a front-end gas-liquid separation system, a middle-end heat exchange cooling dewatering system and a rear-end drying and filtering system; the front-end gas-liquid separation system comprises a gas-liquid separator, a sample gas inlet pipe inserted into the gas-liquid separator from the top, a liquid discharge pipe with a solenoid valve and arranged at the bottom of the gas-liquid separator, and a liquid level switch arranged in the gas-liquid separator, wherein the sample gas inlet pipe is externally connected with a sampling probe; the middle-end heat exchange cooling water removal system comprises a vortex tube cooler, a compressed air tube with a micro-regulating valve, a cold cavity, a heat exchange barrel, a primary dryer and a peristaltic pump, wherein the compressed air tube is connected with the vortex tube cooler, the cold cavity is connected with the vortex tube cooler through a pipeline, the heat exchange barrel is sleeved outside the cold cavity, the primary dryer is connected with the top of the cold cavity through a circulating pipeline, and the peristaltic pump is connected to the bottom of the cold cavity; the top of the gas-liquid separator is connected with the top of the cold cavity through a sample gas conveying pipe; the rear-end drying and filtering system comprises a secondary dryer connected with the top of the cold cavity through a pipeline, and the secondary dryer is connected with the sampling pump through a pipeline; an armored thermal resistor for temperature detection is arranged in the heat exchange cylinder; the armored thermal resistor, the electromagnetic valve, the liquid level switch, the micro-regulating valve and the vortex tube cooler are all electrically connected with the controller.
Furthermore, a silencer is arranged on the vortex tube cooler.
The utility model discloses the sample gas with the extraction is through a gas-liquid separation, twice vortex refrigeration dewatering, and twice drying has fully detached the moisture in the sample gas, and entire system is an automatic processing's process, and degree of automation is high, and refrigerating system only needs compressed air to get into the vortex tube cooler just can realize the refrigeration effect. The utility model discloses can not only stable provide the dry sample gas of constant temperature, can also effectively solve flue gas leakage, the anticorrosive scheduling problem of instrument, but the multicomponent high temperature flue gas analyzer sample gas condensation dewatering preliminary treatment that the wide application produces in smelting trade producer.
The utility model discloses replaced traditional compressor refrigeration sample gas's method, the acidizing fluid that the sample gas condensation produced can not get into gas circuit and instrument, and the fault rate is low, and the operation is stable, and long service life can guarantee measurement and analysis's continuity, ensures production normal operating, but and greatly reduced instrument maintenance volume and cost of maintenance.
The utility model discloses the device is small, simple structure, and the installation of being convenient for, the practicality is strong, and the energy consumption is low, and the environmental protection is high-efficient, is difficult to cause the flue gas to leak, has protected operation environment and operation security.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention;
fig. 2 is a schematic view of a radial cross section of the cold chamber and the heat exchange cartridge.
In the figure, 1-a gas-liquid separator, 2-a sample gas inlet pipe, 3-a liquid discharge pipe, 4-an electromagnetic valve, 5-a liquid level switch, 6-a vortex tube cooler, 7-a silencer, 8-a compressed air pipe, 9-a micro-regulating valve, 10-a cold cavity, 11-a heat exchange cylinder, 12-a primary dryer, 13-a circulating pipeline, 14-a sample gas conveying pipe, 15-a peristaltic pump, 16-a secondary dryer, 17-a sampling pump, 18-an armored resistor, 19-a primary dried sample gas conveying pipe and 20-a secondary dried conveying pipe.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
The pretreatment device for the tin smelting flue gas online analysis sample gas shown in figure 1 comprises a front-end gas-liquid separation system, a middle-end heat exchange cooling dewatering system and a rear-end drying and filtering system. The front-end gas-liquid separation system comprises a gas-liquid separator 1, a sample gas inlet pipe 2 inserted into the gas-liquid separator from the top, a liquid discharge pipe 3 with a solenoid valve 4 and arranged at the bottom of the gas-liquid separator, and a liquid level switch 5 arranged in the gas-liquid separator, wherein the sample gas inlet pipe is externally connected with a sampling probe. The middle-end heat exchange cooling water removal system comprises a vortex tube cooler 6, a silencer 7 connected with the vortex tube cooler, a compressed air pipe 8 connected with the vortex tube cooler and provided with a micro-regulating valve 9, a cold cavity 10 connected with the vortex tube cooler through a pipeline, a heat exchange barrel 11 sleeved outside the cold cavity, a primary dryer 12 connected with the top of the cold cavity through a circulating pipeline 13, and a peristaltic pump 14 connected with the bottom of the cold cavity. The gas-liquid separator 7 is connected with the cold cavity 10 through a sample gas conveying pipe 15, and two ends of the sample gas conveying pipe 15 are respectively inserted from the top of the gas-liquid separator 7 and the top of the cold cavity 10. The back end drying and filtering system includes a secondary dryer 16 connected to the top of the cold chamber by a pipe. The secondary dryer is connected with a sampling pump 17 through a pipeline. As shown in fig. 2, the heat exchange tube 11 incorporates a sheathed thermal resistor 18 for temperature detection. Fig. 2 also shows the arrangement of the internal pipeline structure of the cold chamber 10 and the structures of the internal pipeline and the external circulation pipeline 13, the sample gas conveying pipe 14, the compressed air pipe 8 respectively connected with the vortex tube cooler 6, the peristaltic pump 15, the conveying pipe 19 connected with the primary dryer 12 and the connecting conveying pipe 20 connected with the secondary dryer 16. The armored thermal resistor 18, the electromagnetic valve 4, the liquid level switch 5, the micro-regulating valve 8 and the vortex tube cooler 6 are all electrically connected with the controller. The silencer 7 can eliminate the noise generated when the compressed air enters the vortex tube cooler. The gas-liquid separator, the vortex tube cooler, the dryer, the sampling pump, the peristaltic pump and the heat exchange cylinder of the armored thermal resistor are all parts in the prior art and can be directly purchased in the market.
Adopt the tin smelting flue gas on-line analysis sample gas preprocessing device carries out the method of sample gas preprocessing as follows: stretch into sample gas collection point (like the stove, the flue etc.) with sample gas intake pipe 2 external sampling probe, gather sample gas through starting sampling pump 17, sample gas enters gas-liquid separator 1 through sample gas intake pipe 2 and carries out the first separation dewatering of liquid water and sample gas, the acidizing fluid mixture liquid level of agglomerating gradually in the gas-liquid separator passes through liquid level switch 5 and detects, when the liquid level reachs the locking liquid level, convey the controller with liquid level signal, controller control solenoid valve 4 opens, automatically, discharge liquid in the gas-liquid separator, prevent that the liquid level from excessively high anti-inhaling in the sample gas intake pipe. The sample gas which is subjected to gas-liquid separation and contains water vapor enters the cold cavity 10 through the sample gas conveying pipe 14, meanwhile, compressed air is sent to the vortex tube cooler 6 through the compressed air pipe 8, the armored thermal resistor in the heat exchange cylinder 11 is subjected to temperature detection, a detection signal is transmitted to the conveying controller, the micro-regulating valve 9 is subjected to PID regulation through the controller, so that the air inflow of the compressed air cooled by the vortex of the vortex tube cooler 6 is controlled, the temperature in the heat exchange cylinder is kept constant at a set value, the water vapor in the sample gas entering the cold cavity is fully condensed into liquid water, and the condensed water is discharged through the peristaltic pump 15 at the lower end of the cold cavity. The sample gas after the primary dewatering of cold chamber all connects in the circulation line 13 at cold chamber top through import and export and gets into primary dryer 12 earlier, and the sample gas rethread primary drying sample gas conveyer pipe 19 after the primary drying returns cold chamber 10 and carries out the secondary condensation dewatering, and the sample gas after the condensation dewatering gets into secondary dryer 16 through secondary drying conveyer pipe 20 again and carries out the secondary drying and then gets into sample pump 17, and the condensation dewatering preliminary treatment of sample gas is accomplished to this moment.
The heat exchange cylinder refrigerates the refrigerated compressed air sent by the vortex tube cooler to carry out sample gas pretreatment, condensation and dehydration, and the vortex tube cooler converts the compressed air into cold airflow through vortex cyclone. Compressed air of 0.2-0.4MPa is input, cold air generated by energy conversion in the vortex tube cooler enters the heat exchange barrel, and the temperature in the heat exchange barrel is controlled by adjusting the air inlet flow of the compressed air through the controller. The lower end of the cold chamber is connected with a peristaltic pump, the temperature is set to be 5 ℃, and the generated condensed water is discharged through the peristaltic pump in the heat exchange process. A humidity sensor can be arranged in the secondary dryer to detect the moisture of the sample gas, and the moisture is sent to an analysis instrument for analysis through a sampling pump after reaching the standard. The whole process realizes automatic condensation and water removal of sample gas pretreatment, greatly reduces material consumption and maintenance amount, and effectively ensures production efficiency and safety.
Claims (2)
1. A pretreatment device for online analysis sample gas of tin smelting flue gas is characterized by comprising a front-end gas-liquid separation system, a middle-end heat exchange cooling dewatering system and a rear-end drying and filtering system; the front-end gas-liquid separation system comprises a gas-liquid separator (1), a sample gas inlet pipe (2) inserted into the gas-liquid separator from the top, a liquid discharge pipe (3) provided with a solenoid valve (4) and arranged at the bottom of the gas-liquid separator, and a liquid level switch (5) arranged in the gas-liquid separator, wherein the sample gas inlet pipe is externally connected with a sampling probe; the middle-end heat exchange cooling water removal system comprises a vortex tube cooler (6), a compressed air pipe (8) which is connected with the vortex tube cooler and is provided with a micro-regulating valve (9), a cold cavity (10) which is connected with the vortex tube cooler through a pipeline, a heat exchange barrel (11) which is sleeved outside the cold cavity, a primary dryer (12) which is connected with the top of the cold cavity through a circulating pipeline (13), and a peristaltic pump (15) which is connected with the bottom of the cold cavity; the top of the gas-liquid separator (1) is connected with the top of the cold cavity (10) through a sample gas conveying pipe (14); the rear-end drying and filtering system comprises a secondary dryer (16) connected with the top of the cold cavity through a pipeline, and the secondary dryer is connected with a sampling pump (17) through a pipeline; a sheathed thermal resistor (18) for temperature detection is arranged in the heat exchange cylinder (11); the armored thermal resistor (18), the electromagnetic valve (4), the liquid level switch (5), the micro-regulating valve (9) and the sampling pump (17) are all electrically connected with the controller.
2. The pretreatment device for the on-line analysis sample gas of tin smelting flue gas according to claim 1, characterized in that a silencer (7) is arranged on the vortex tube cooler (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021110546.XU CN212459108U (en) | 2020-06-16 | 2020-06-16 | Tin smelting flue gas on-line analysis sample gas preprocessing device |
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| CN202021110546.XU CN212459108U (en) | 2020-06-16 | 2020-06-16 | Tin smelting flue gas on-line analysis sample gas preprocessing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595655A (en) * | 2020-06-16 | 2020-08-28 | 云南锡业股份有限公司锡业分公司 | Pretreatment device and pretreatment method for online analysis sample gas of tin smelting flue gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595655A (en) * | 2020-06-16 | 2020-08-28 | 云南锡业股份有限公司锡业分公司 | Pretreatment device and pretreatment method for online analysis sample gas of tin smelting flue gas |
| CN111595655B (en) * | 2020-06-16 | 2024-04-30 | 云南锡业股份有限公司锡业分公司 | Pretreatment device and pretreatment method for on-line analysis of sample gas of tin smelting flue gas |
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