Sample dehumidification pretreatment system

Abstract

The utility model discloses a sample dehumidification pretreatment system, which comprises an on-line monitoring equipment sampling pool, a cooling liquid exhauster and a jet pump, a vortex tube is arranged in the cooling liquid exhauster, a sample inlet is connected with a sample input pipeline, and a sample outlet is connected with a sample outlet. The sample outlet is connected with the input end of the on-line monitoring equipment sampling pool through a pipeline, the output end of the on-line monitoring equipment sampling pool and the liquid drop outlet are connected with the extraction inlet, and the compressed air inlet is connected with an instrument compressed air input pipeline through a pipeline. The vortex tube is communicated and connected with the instrument compressed air input pipeline, and the output end of the jet pump is connected with a process pipeline. According to the utility model, the vortex tube is used as a cold source, sample gas is condensed to form water drops after being in contact with the inner wall, cooled by the vortex tube, of the cooling liquid exhauster, and the water drops attached to the inner wall surface flow to the bottom of the cooling liquid exhauster under the action of gravity, so that the humidity of a sample is reduced, and dehumidification is completed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of sample dehumidification, and in particular to a sample dehumidification pretreatment system. Background Art

[0002] The process gas in the coking unit of the refinery operation area in petrochemical production needs to enter the sampling pool of the on-line monitoring equipment for monitoring and sampling. The main components of the measured sample gas in this coking unit are combustible gas, hydrogen sulfide, a large amount of water vapor and a small amount of VOC, etc. And the process gas monitoring equipment has relatively high requirements for the humidity of the sample. Before the sample enters the equipment for detection, the moisture content of the sample gas must be controlled. Traditional dehumidification methods can be classified into cooling dehumidification, adsorption dehumidification, absorption dehumidification, compression dehumidification, etc. according to their principles. The present invention mainly uses the cooling method to process the measured sample gas. Cooling dehumidification is to contact the wet gas with a liquid or solid wall surface below the dew point of the condensable vapor, so that the water vapor condenses and the gas is heated and discharged, thereby removing the excess water vapor. Considering that traditional cooling dehumidification generally uses a refrigerant as the cold source, the refrigeration unit is relatively large, and the space above the petrochemical production device is limited and the electrical safety explosion-proof requirements are strict, so the traditional refrigeration unit is not applicable. Utility Model Content

[0003] The present disclosure provides a sample dehumidification pretreatment system to solve one of the technical problems recognized by the inventors.

[0004] The present disclosure provides a sample dehumidification pretreatment system, including a sampling pool of on-line monitoring equipment, a cooling de-liquidizer and a jet pump. The top of the cooling de-liquidizer is respectively provided with a sample inlet and a sample outlet, the bottom of the cooling de-liquidizer is provided with a liquid drop outlet, and a vortex tube is arranged inside the cooling de-liquidizer. The sample inlet is connected with a sample input pipeline, the sample outlet is connected with the input end of the on-line monitoring equipment sampling pool through a pipeline. The jet pump includes two input ends, an extraction inlet and a compressed air inlet. The output end of the on-line monitoring equipment sampling pool and the liquid drop outlet are connected with the extraction inlet. The compressed air inlet is connected with an instrument compressed air input pipeline through a pipeline. The vortex tube is connected with the instrument compressed air input pipeline in a through manner. The output end of the jet pump is connected with a process pipeline.

[0005] Preferably, a primary filter is arranged on the sample input pipeline.

[0006] Preferably, a sample glass rotameter is arranged between the sample outlet and the on-line monitoring equipment sampling pool.

[0007] Preferably, a secondary filter is arranged between the sample outlet and the sample glass rotameter.

[0008] Preferably, a three-stage filter is provided between the sample glass rotor flowmeter and the sampling pool of the on-line monitoring device.

[0009] Preferably, a de-liquid glass rotor flowmeter is provided between the liquid drop outlet and the extraction inlet.

[0010] Preferably, a first air filter pressure reducing valve is provided between the vortex tube and the instrument compressed air input pipeline.

[0011] Preferably, a second air filter pressure reducing valve is provided between the instrument compressed air input pipeline and the compressed air inlet.

[0012] Preferably, ball valves are provided on both the sample input pipeline and the instrument compressed air input pipeline.

[0013] Preferably, maintenance sewage outlets are provided at the bottoms of both the cooling de-liquid device and the secondary filter.

[0014] The beneficial effects of the present disclosure mainly lie in that: in the present utility model, the vortex tube is used as a cold source. When the sample gas contacts the inner wall of the cooling de-liquid device cooled by the vortex tube, water droplets will condense. The water droplets adhering to the inner wall surface will flow to the bottom of the cooling de-liquid device under the action of gravity, thereby reducing the humidity of the sample and completing dehumidification.

[0015] In the present utility model, through multi-stage filtration, impurities in the sample gas are purified to prevent contamination of the probe of the sampling pool of the on-line monitoring device.

[0016] It should be understood that both the foregoing general description and the following detailed description are for the purpose of illustration and example and are not necessarily limiting to the present disclosure. The accompanying drawings incorporated into and constituting a part of the specification illustrate the subject matter of the present disclosure. At the same time, the specification and the drawings are used to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a sample dehumidification pretreatment system diagram of an embodiment of the present disclosure;

[0019] Icons: 1 - Sampling pool of on - line monitoring device; 2 - Cooling and liquid - separating device; 201 - Sample inlet; 202 - Sample outlet; 203 - Vortex tube; 204 - Liquid droplet outlet; 205 - Maintenance sewage outlet; 3 - Jet pump; 301 - Extraction inlet; 302 - Compressed air inlet; 4 - Primary filter; 5 - Secondary filter; 6 - Tertiary filter; 7 - Sample input pipeline; 8 - Instrument compressed air input pipeline; 9 - Sample glass rotameter; 10 - Liquid - separating glass rotameter; 11 - First air filter and pressure reducing valve; 12 - Second air filter and pressure reducing valve; 13 - Ball valve. Detailed implementation manners

[0020] The technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present disclosure, rather than all of them.

[0021] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0022] In the description of the present disclosure, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present disclosure. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present disclosure, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0024] Embodiment

[0025] As Figure 1As shown in the figure, this embodiment provides a sample dehumidification pretreatment system, including an on-line monitoring equipment sampling pool 1, a cooling de-liquidator 2 and a jet pump 3. The top of the cooling de-liquidator 2 is respectively provided with a sample inlet 201 and a sample outlet 202. The bottom of the cooling de-liquidator 2 is provided with a liquid drop outlet 204. An eddy current tube 203 is arranged inside the cooling de-liquidator 2. The sample inlet 201 is connected with a sample input pipeline 7, and the sample input pipeline 7 is used for inputting sample gas. The sample outlet 202 is connected with the input end of the on-line monitoring equipment sampling pool 1 through a pipeline. The jet pump 3 includes two input ends, an extraction inlet 301 and a compressed air inlet 302. The output end of the on-line monitoring equipment sampling pool 1 and the liquid drop outlet 204 are connected with the extraction inlet 301 through a tee. The compressed air inlet 302 is connected with an instrument compressed air input pipeline 8 through a pipeline. The eddy current tube 203 is connected with the instrument compressed air input pipeline 8 in a through manner. The output end of the jet pump 3 is connected with a process pipeline.

[0026] Among them, a primary filter 4 is arranged on the sample input pipeline 7. The primary filter 4 filters out larger impurity particles and the like that may be contained in the sample gas. The sample gas after preliminary filtration enters the sample inlet 201.

[0027] Among them, a sample glass rotameter 9 is arranged between the sample outlet 202 and the on-line monitoring equipment sampling pool 1. The flow rate of the sample gas is adjusted through the sample glass rotameter 9.

[0028] Furthermore, a secondary filter 5 is arranged between the sample outlet 202 and the sample glass rotameter 9. The secondary filter 5 is mainly used to block part of the liquid drops carried out from the cooling de-liquidator 2 and further filter the impurities of the sample gas. The sample gas filtered by the secondary filter 5 enters the sample glass rotameter 9 to adjust the flow rate.

[0029] Even further, a tertiary filter 6 is arranged between the sample glass rotameter 9 and the on-line monitoring equipment sampling pool 1. The tertiary filter 6 further filters the sample gas and adsorbs the moisture in the sample gas to ensure that the humidity of the sample gas passing through the tertiary filter 6 meets the requirements.

[0030] Among them, a de-liquid glass rotameter 10 is arranged between the liquid drop outlet 204 and the extraction inlet 301. The de-liquid glass rotameter 10 is used to adjust the flow rate.

[0031] Among them, a first air filter pressure reducing valve 11 is arranged between the eddy current tube 203 and the instrument compressed air input pipeline 8. The function of pressure reduction and voltage stabilization is realized through the first air filter pressure reducing valve 11.

[0032] Wherein, a second air filter pressure reducing valve 12 is provided between the instrument compressed air input pipeline 8 and the compressed air inlet 302, and the functions of pressure reduction and pressure stabilization are realized through the second air filter pressure reducing valve 12.

[0033] Furthermore, ball valves 13 are provided on both the sample input pipeline 7 and the instrument compressed air input pipeline 8, and the on-off of the sample gas and the compressed air is controlled through the ball valves 13.

[0034] Wherein, maintenance drain ports 205 are provided at the bottoms of both the cooling and de-liquefying device 2 and the secondary filter 5. By providing the maintenance drain ports 205 at the bottoms of the cooling and de-liquefying device 2 and the secondary filter 5, it is convenient to maintain the cooling and de-liquefying device 2 and the secondary filter 5 and drain sewage.

[0035] The working principle of the present utility model: The measured sample gas enters the primary filter 4 through the sample input pipeline 7. The primary filter 4 filters larger impurity particles and the like in the sample gas. After passing through the primary filter 4, the sample gas enters through the sample inlet 201 of the cooling and de-liquefying device 2. The sample gas exchanges heat with the cold air generated by the vortex tube 203 inside the cooling and de-liquefying device 2. When the sample gas contacts the inner wall of the cooling and de-liquefying device 2 cooled by the vortex tube 203, it will condense into water droplets. The water droplets adhering to the inner wall will flow to the bottom of the cooling and de-liquefying device 2 under the action of gravity. The dehumidified sample gas is discharged from the sample outlet 202 and enters the secondary filter 5. The secondary filter 5 is mainly used to block some of the liquid droplets carried out from the cooling and de-liquefying device 2 and further filter the impurities in the sample gas. The sample gas filtered by the secondary filter 5 enters the sample glass rotameter 9 to adjust the flow rate. After adjusting the flow rate through the sample glass rotameter 9, it enters the tertiary filter 6. The tertiary filter 6 further filters the sample gas and adsorbs the moisture in the sample gas to ensure that the humidity of the sample gas passing through the tertiary filter 6 meets the requirements. Finally, it enters the sampling pool 1 of the on-line monitoring device for sampling and detection.

[0036] Moreover, after the sample gas passes through the sampling pool 1 of the on-line monitoring device, it is discharged from the output end. The liquid droplets separated from the liquid droplet outlet 204 at the bottom of the three-way joint and the cooling and de-liquefying device 2 are gathered together and enter the extraction inlet 301 of the jet pump 3. Finally, it returns to the process pipeline through the output end of the jet pump 3. Similarly, the vortex tube 203 and the instrument compressed air are gathered through the three-way joint and enter the compressed air inlet 302 of the jet pump 3. Finally, it returns to the process pipeline through the output end of the jet pump 3.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A sample dehumidification pretreatment system, characterized in that, Including: An online monitoring device sampling pool, a cooling and liquid separating device, and a jet pump. A sample inlet and a sample outlet are respectively arranged at the top of the cooling and liquid separating device. A liquid drop outlet is arranged at the bottom of the cooling and liquid separating device. A vortex tube is arranged inside the cooling and liquid separating device. The sample inlet is connected with a sample input pipeline. The sample outlet is connected with the input end of the online monitoring device sampling pool through a pipeline. The jet pump includes two input ends, namely a pumping inlet and a compressed air inlet. The output end of the online monitoring device sampling pool and the liquid drop outlet are connected with the pumping inlet. The compressed air inlet is connected with an instrument compressed air input pipeline through a pipeline. The vortex tube is connected with the instrument compressed air input pipeline in a through manner. The output end of the jet pump is connected with a process pipeline.

2. The sample dehumidification pretreatment system according to claim 1, wherein A primary filter is arranged on the sample input pipeline.

3. The sample dehumidification pretreatment system according to claim 1, characterized in that, A sample glass rotameter is arranged between the sample outlet and the online monitoring device sampling pool.

4. The sample dehumidification pretreatment system according to claim 3, wherein, A secondary filter is arranged between the sample outlet and the sample glass rotameter.

5. The sample dehumidification pretreatment system according to claim 4, wherein A tertiary filter is arranged between the sample glass rotameter and the online monitoring device sampling pool.

6. The sample dehumidification pretreatment system according to claim 1, characterized in that, A de-liquid glass rotameter is arranged between the liquid drop outlet and the pumping inlet.

7. A sample dehumidification pretreatment system according to claim 1, wherein A first air filter and pressure reducing valve is arranged between the vortex tube and the instrument compressed air input pipeline.

8. The sample dehumidification pretreatment system according to claim 7, wherein, A second air filter and pressure reducing valve is arranged between the instrument compressed air input pipeline and the compressed air inlet.

9. The sample dehumidification pretreatment system according to claim 1, characterized in that Ball valves are arranged on both the sample input pipeline and the instrument compressed air input pipeline.

10. A sample dehumidification pretreatment system according to claim 4, characterized in that, Maintenance sewage discharge ports are arranged at the bottoms of both the cooling and liquid separating device and the secondary filter.

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