Automatic liquid discharging mechanism for pretreatment of on-line analyzer

Abstract

The utility model discloses an automatic liquid drainage mechanism for pretreatment of an online analyzer, which comprises a sampling needle probe for sampling a gas phase sample in a conveying pipeline, a pretreatment device connected with the sampling needle probe, and the online analyzer connected with the pretreatment device, the pretreatment device comprises a box body, a sample inlet and a detection outlet which are formed in the side wall of the box body, a standard gas inlet, a cable inlet and a liquid discharge outlet which are formed in the bottom of the box body, and a first filter, a gas-liquid separator, a second filter and a three-way ball valve which are sequentially connected and arranged between the sample inlet and the detection outlet through pipelines; the standard gas inlet is connected with the three-way ball valve through a pipeline, and the bottom of the gas-liquid separator and the liquid discharge outlet are connected with an automatic liquid discharge device through a pipeline. The problem of liquid drainage in the online analysis sampling process can be solved, so that the condition that gas carries liquid in a detected sample is avoided, and a production device can operate safely and stably for a long period; and 24-hour continuous monitoring is provided for an on-line analyzer.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of online analysis appearance, specifically relates to a kind of online analysis appearance pretreatment automatic liquid discharge mechanism. BACKGROUND

[0002] With the continuous development of petroleum, chemical, food, pharmaceutical and other industries, online analysis instrument can detect the data required for detecting various components in liquid, gas and solid samples, to provide more accurate and timely analysis results for enterprises, to help control and optimize in production process. Through online monitoring, analyzer can quickly respond to abnormal conditions, provide early warning, reduce downtime and production loss. However, in the process of long-term use of online gas analyzer, the condensate discharge in gas component has been a problem that cannot be ignored. Therefore, the research and development of online continuous liquid discharge device for gas analysis will solve a series of potential hazards and obtain accurate analysis results. SUMMARY

[0003] In order to solve the technical problems existing in the prior art, the purpose of the present application is to provide an online analysis instrument pretreatment automatic liquid discharge mechanism, which can solve the liquid discharge problem in the online analysis sampling process, so that there is no gas with liquid in the detected sample, so that the production device can be safely and stably operated for a long period of time. It provides 24-hour continuous monitoring for online analysis instrument. It not only improves the production efficiency, but also promotes energy saving, emission reduction and environmental protection, and has significant social benefits.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0005] An online analysis instrument pretreatment automatic liquid discharge mechanism, comprising a sampling needle probe for sampling gas phase sample in a conveying pipeline, a pretreatment device connected with the sampling needle probe, and an online analyzer connected with the pretreatment device. The pretreatment device comprises a box body, a sample inlet and a detection outlet provided on the side wall of the box body, a calibration gas inlet, a cable inlet and a liquid discharge outlet provided at the bottom of the box body, a first filter, a gas-liquid separator, a second filter, a three-way ball valve, a first flow meter and a third filter connected in sequence between the sample inlet and the detection outlet through a pipeline. The calibration gas inlet is connected with the three-way ball valve through a pipeline. The bottom of the gas-liquid separator is connected with the liquid discharge outlet through a pipeline. One end of the sampling needle probe is installed on the sample inlet. One end of the online analyzer is installed outside the detection outlet.

[0006] Preferably, the automatic liquid discharge device is provided with a liquid storage tank at the bottom of the automatic liquid discharge device, a needle valve at the bottom of the liquid storage tank, and a floating ball in the liquid storage tank for controlling the needle valve.

[0007] Preferably, a pressure gauge is arranged on the second filter, and the third filter is micron level.

[0008] Preferably, a quick return circuit connected with the first filter is further arranged in the box, and the first filter is connected with a low-pressure flare through the quick return circuit.

[0009] Preferably, a one-way valve and a second flow meter are arranged on the quick return circuit.

[0010] Preferably, an instrument air inlet is further arranged on one side of the box, the gas-liquid separator is connected with the instrument air inlet through a pipeline, and a pressure regulating valve is arranged on the connecting pipeline between the gas-liquid separator and the instrument air inlet.

[0011] Preferably, a heater is further arranged in the box, and the heater is connected with the cable inlet through a cable.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] A pretreatment device with an automatic liquid discharge device is arranged between the sampling needle probe and the online analyzer, liquid in sample gas is separated from gas and automatically discharged through the automatic liquid discharge device, so that the liquid discharge problem in the sampling process of online analysis can be solved, the gas can be more pure after three times of filtration, the gas with liquid condition does not exist in the detected sample, the online analyzer can normally and continuously operate when the sample contains liquid, the production device can be safely and stably operated for a long period, the online analyzer is provided with 24-hour continuous monitoring, the production efficiency is improved, energy saving, emission reduction and environmental protection are promoted, and remarkable social benefits are obtained. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the utility model;

[0015] Figure 2 It is a cross-sectional view of the automatic liquid discharge device of the utility model;

[0016] Figure: 1, fast loop; 2, pretreatment device; 3, check valve; 4, tank; 5, second flow meter; 6, sample inlet; 7, sampling needle probe; 8, first filter; 9, instrument air inlet; 10, pressure regulating valve; 11, gas-liquid separator; 12, pressure gauge; 13, second filter; 14, three-way ball valve; 15, first flow meter; 16, detection outlet; 17, online analyzer; 18, third filter; 19, liquid storage tank; 20, needle valve; 21, heater; 22, cable inlet; 23, standard gas inlet; 24, liquid discharge outlet; 25, automatic liquid discharge device; 26, float ball. DETAILED DESCRIPTION

[0017] Hereinafter, the present application will be further described in conjunction with the drawings and the specific embodiments, and it should be noted that the following described embodiments or technical features between each other or between each other can be combined to form new embodiments without conflict.

[0018] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0019] The terms "first", "second", etc. in the present application are used to distinguish similar objects, and are not used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of a kind and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the associated objects before and after are in a "or" relationship.

[0020] As Figure 1As shown, an online analyzer pretreatment automatic drainage mechanism, comprising a sampling needle probe 7 for sampling gas phase samples in a conveying pipeline, a pretreatment device 2 connected with the sampling needle probe 7, and an online analyzer 17 connected with the pretreatment device 2, characterized in that the pretreatment device 2 comprises a box body 4, a sample inlet 6 and a detection outlet 16 arranged on the side wall of the box body 4, a calibration gas inlet 23, a cable inlet 22 and a drainage outlet 24 arranged at the bottom of the box body 4, a first filter 8, a gas-liquid separator 11, a second filter 13, a three-way ball valve 14, a first flow meter 15 and a third filter 18 arranged in sequence between the sample inlet 6 and the detection outlet 16 through pipelines, the calibration gas inlet 23 is connected with the three-way ball valve 14 through a pipeline, the bottom of the gas-liquid separator 11 is connected with the drainage outlet 24 through a pipeline, an automatic drainage device 25, one end of the sampling needle probe 7 is installed on the sample inlet 6, and one end of the online analyzer 17 is installed outside the detection outlet 16.

[0021] In actual use, the standard gas enters the tee valve through the pipeline, then enters the online analyzer 17 after being filtered by the third filter 18 for instrument calibration, and then enters the online analyzer 17 for detection after the gas phase sample is sampled by the sampling needle probe 7. Due to uncontrollable factors of actual process conditions, a large amount of liquid medium is carried in the gas phase sample in the conveying pipeline, and the online gas analyzer has the characteristics that the instrument online analyzer 17 does not allow the existence of liquid. When there is liquid in the gas phase sample, it may cause unreliable analysis data, which cannot be used as a reference for adjusting the working condition, resulting in production loss, or it may cause instrument damage, resulting in direct economic loss. Therefore, in view of this problem, a pretreatment device 2 with an automatic liquid discharge device 25 is added between the sampling needle probe 7 and the online analyzer 17. When the sampling needle probe 7 collects the gas phase sample from the conveying pipeline, the gas phase sample is first filtered by the first filter 8, then conveyed to the gas-liquid separator 11 for gas-liquid separation, the separated gas is filtered by the second filter 13, and then the gas phase flow required for detection is controlled by the first flow meter 15 and conveyed to the online analyzer 17. The liquid separated by the gas-liquid separator 11 is conveyed to the automatic liquid discharge device 25 through the pipeline at the bottom, and is automatically discharged to the outside of the box 4 through the automatic liquid discharge device 25. Through three times of filtering, the sample gas is pre-treated by the pretreatment device 2, and the liquid in the sample gas is separated from the gas and automatically discharged by the automatic liquid discharge device 25, so that the problem of liquid discharge in the online analysis sampling process can be solved. After three times of filtering, the gas is more pure, and the sample to be detected no longer contains liquid. After adding the pretreatment device 2 with the automatic liquid discharge device 25, the online analyzer can also run normally and continuously when the sample contains liquid, so that the production device can run safely and stably for a long period of time. The online analyzer can provide 24-hour continuous monitoring, can timely discover abnormal conditions and issue an alarm, can reduce the loss caused by sample components, and can effectively avoid the occurrence of sample liquid abnormal events. Through real-time monitoring, automatic control and early warning functions, the production efficiency is improved, energy saving and emission reduction and environmental protection are promoted, and significant social benefits are achieved.

[0022] As shown in Figure 2 Further improved, the automatic liquid discharge device 25 is provided with a liquid storage tank 19 at the bottom of the automatic liquid discharge device 25, a needle valve 20 at the bottom of the liquid storage tank 19, and a floating ball 26 in the liquid storage tank 19 for controlling the needle valve 20.

[0023] The needle valve 20 is connected with the floating ball 26. After the liquid separation through the gas-liquid separator 11, the liquid is discharged outward. The liquid can be continuously discharged through the setting of the liquid storage tank 19, so that the instrument operation is not affected due to the excessive liquid content and the inaccuracy of the analysis sample data. When the liquid in the liquid storage tank 19 reaches a certain amount, the floating ball 26 floats up, the needle valve 20 is opened by the floating ball 26, and then the liquid is discharged from the bottom of the liquid storage tank 19. When the floating ball 26 slides down, the needle valve 20 is closed, so that the automatic liquid discharge is realized, the operation is more convenient, the interval time can be longer, there is no maintenance cost, and the liquid discharge condition can be directly observed through the liquid discharge outlet 24. After the pretreatment device 2 with the automatic liquid discharge device 25 is added, the problems of long-term investment of a large amount of manpower and time caused by personnel inspection and liquid discharge in the existing equipment can be solved, the problems of high investment cost caused by the installation of the liquid discharge device, the instrument and the automatic control through the system logic configuration can be solved, the production device is safe, environmentally friendly, energy-saving, efficient, stable and long-period running.

[0024] Further improvement is that the second filter 13 is provided with a pressure gauge 12, and the third filter 18 is micron level.

[0025] The gas phase pressure entering the online analyzer 17 can be monitored through the pressure gauge 12. When the gas pressure is insufficient or too large, the valve on the sampling needle probe 7 can be adjusted to avoid the detection instability caused by the too large or too small gas phase pressure. The third filter 18 is micron level, which can make the gas entering the online analyzer 17 more pure and avoid the impurities entering.

[0026] Further improvement is that the box body 4 is further provided with a quick return circuit 1 connected with the first filter 8, and the first filter 8 is connected with the low-pressure flare through the quick return circuit 1.

[0027] Since the sampling needle probe 7 is continuously collecting gas phase samples, and the sampling needle probe 7 collects samples with relatively high pressure, although it can be adjusted through the valve on the sampling needle probe 7, the length of the pipeline is large, and the final gas pressure control through the valve on the sampling needle probe 7 is too difficult to operate, and when there is a change, the uncontrollable factors are large, therefore, the pretreatment device 2 is improved, a rapid loop 1 connected with the low-pressure torch is added in the box 4, so that the collected gas phase samples can be continuously and stably transported to the pretreatment device 2, and the excess gas phase can be shunted to the low-pressure torch through the rapid loop 1, so that the entering gas pressure can be effectively controlled, and the gas phase pressure entering the online analyzer 17 is more accurate. At the same time, since the amount required for detection is small, direct collection is easy to cause poor flowability due to too small gas pressure, and the gas phase deteriorates before entering the online analyzer 17, resulting in inaccurate detection results. Through the addition of the rapid loop 1, the gas flow in the pipeline is faster, and the accuracy of the collected gas is higher.

[0028] Further improvement is that the rapid loop 1 is provided with a one-way valve 3 and a second flow meter 5.

[0029] Through the combination of the one-way valve 3 and the second flow meter 5 on the rapid loop 1, the gas phase pressure entering the online analyzer 17 can be accurately adjusted, and the gas phase pressure entering the online analyzer 17 can be prevented from fluctuating too much during adjustment.

[0030] Further improvement is that one side of the box 4 is also provided with an instrument air inlet 9, the gas-liquid separator 11 is connected with the instrument air inlet 9 through a pipeline, and a pressure regulating valve 10 is arranged on the connecting pipeline of the gas-liquid separator 11 and the instrument air inlet 9.

[0031] When the gas phase product enters the gas-liquid separator 11, due to the too high temperature of the gas phase, it is easy to cause damage to the instrument, and it is also easy to cause the liquid in the gas phase to be difficult to condense and discharge, therefore, after the gas-liquid separator 11 is connected with the instrument air inlet 9 through a pipeline on one side, external cooling gas can be connected, and after the gas-liquid separator 11 is cooled by the external gas, the liquid in the gas phase is quickly cooled and discharged, and the temperature of the gas is also reduced, so that the required detection condition is achieved.

[0032] Further improvement is that the box 4 is also provided with a heater 21, and the cable of the heater 21 is connected through the cable inlet 22.

[0033] The cable of the heater 21 is connected through the cable inlet 22, and the box 4 can be heated through the heater 21, so that the temperature of the gas phase in the pipeline is not too low, especially when there is liquid, which is easy to cause the liquid to condense and block the pipeline.

[0034] The above embodiments are only the preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art based on the present application shall fall within the scope of protection of the present application.

Claims

1. An automatic pretreatment and drainage mechanism for an online analyzer, comprising a sampling needle probe (7) for sampling gas phase samples in a delivery pipeline, a pretreatment device (2) connected to the sampling needle probe (7), and an online analyzer (17) connected to the pretreatment device (2), characterized in that: The pretreatment device (2) includes a housing (4), a sample inlet (6) and a detection outlet (16) provided on the side wall of the housing (4), a standard gas inlet (23), a cable inlet (22) and a drain outlet (24) provided at the bottom of the housing (4), and a first filter (8), a gas-liquid separator (11), a second filter (13), a three-way ball valve (14), a first flow meter (15) and a third filter (18) sequentially connected by pipes between the sample inlet (6) and the detection outlet (16). The standard gas inlet (23) and the three-way ball valve (14) are connected by pipes. The bottom of the gas-liquid separator (11) and the drain outlet (24) are connected by pipes to an automatic drain device (25). One end of the sampling needle probe (7) is installed on the sample inlet (6), and one end of the online analyzer (17) is installed outside the detection outlet (16).

2. The online analyzer pretreatment automatic draining mechanism according to claim 1, characterized in that: The automatic draining device (25) includes a storage tank (19) at the bottom of the automatic draining device (25), a needle valve (20) at the bottom of the storage tank (19), and a float (26) inside the storage tank (19) to control the needle valve (20).

3. The online analyzer pretreatment automatic draining mechanism according to claim 1, characterized in that: The second filter (13) is equipped with a pressure gauge (12), and the third filter (18) is micron-sized.

4. The online analyzer pretreatment automatic draining mechanism according to claim 3, characterized in that: The housing (4) is also provided with a fast circuit (1) connected to the first filter (8), and the first filter (8) is connected to the low-pressure torch through the fast circuit (1).

5. The online analyzer pretreatment automatic draining mechanism according to claim 4, characterized in that: The fast circuit (1) is equipped with a one-way valve (3) and a second flow meter (5).

6. The online analyzer pretreatment automatic draining mechanism according to claim 1, characterized in that: The box (4) is also provided with an instrument air inlet (9) on one side. The gas-liquid separator (11) is connected to the instrument air inlet (9) through a pipe. A pressure regulating valve (10) is provided on the connecting pipe between the gas-liquid separator (11) and the instrument air inlet (9).

7. The online analyzer pretreatment automatic draining mechanism according to claim 1, characterized in that: The housing (4) is also equipped with a heater (21), which is connected by a cable through the cable inlet (22).

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