In-situ analyzer sampling line vapor backflush device

Abstract

This utility model belongs to the field of coking in-situ measurement and analysis table processing, and relates to a steam backflushing device for the sampling pipeline of an in-situ analyzer. It includes an in-situ analyzer, with sampling pipelines on both sides of the analyzer. A sampler is installed at the end of each sampling pipeline. A purge branch pipe is connected to the sampler and the sampling pipeline, and the purge branch pipe is connected to the purge main pipe. The purge main pipe is divided into a first pipeline and a second pipeline at both ends. The first pipeline is equipped with a first solenoid valve and a first check valve connected to a protective air source. The second pipeline is equipped with a second solenoid valve and a second check valve connected to a purge steam source. This utility model performs periodic steam backflushing and uses a gas source for gas protection when the analyzer is in use. Periodic steam backflushing prevents crystallization and removes any crystallized material, ensuring that the pipeline is free of crystals or has only a small amount of crystals.

Description

Technical Field

[0001] This utility model belongs to the field of coking in-situ measurement and analysis table processing, specifically relating to a steam backflushing device for the sampling pipeline of an in-situ analyzer. Background Technology

[0002] In the chemical, coking, and coal gasification industries, in-situ analyzers are widely used for real-time monitoring of high-boiling-point, easily crystallizing volatile substances such as tar, benzene, naphthalene, and pitch in process gases. However, when flowing through the sampling pipeline, crystals are easily precipitated due to temperature drops or pressure changes, causing blockages in the sampling pipeline and sampler.

[0003] Currently, the industry commonly uses protective gas backflushing as a blockage prevention measure. This involves periodically injecting high-pressure gas into the sampling pipeline to flush the pipeline in reverse and remove deposits. However, for tar-like crystals with high viscosity and high freezing point, gas backflushing cannot effectively dissolve the crystals and is insufficient to break down the stubborn crystalline structures formed by tar, asphalt, etc., resulting in limited unblocking effects.

[0004] Therefore, a steam backflushing device for the sampling pipeline of an in-situ analyzer is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a steam backflushing device for the sampling pipeline of an in-situ analyzer, which has the function of steam backflushing for the sampling pipeline of an in-situ analyzer. It solves the problem that the gas backflushing of the prior art cannot effectively dissolve crystals, is difficult to destroy the stubborn crystal structure formed by tar, asphalt and other substances, and has a limited unblocking effect.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a steam backflushing device for the sampling pipeline of an in-situ analyzer, including an in-situ analyzer, sampling pipelines arranged on both sides of the in-situ analyzer, a sampler arranged at the end of the sampling pipeline, a purge branch pipe connected to the sampler and the sampling pipeline, the purge branch pipe connected to the purge main pipe, the purge main pipe being divided into a first pipeline and a second pipeline at both ends, a first solenoid valve and a first check valve arranged on the first pipeline and connected to a protective air source, and a second solenoid valve and a second check valve arranged on the second pipeline and connected to a purge steam source.

[0007] Preferably, the system also includes a controller, which is electrically connected to the first solenoid valve and the second solenoid valve.

[0008] Preferably, the first check valve is installed with the protective air source flowing to the purge main pipe, and the second check valve is installed with the purge steam source flowing to the purge main pipe.

[0009] Preferably, a steam pressure reducing valve is connected in series between the purging steam source and the second solenoid valve on the second pipeline.

[0010] Preferably, the sampler is a porous ceramic sampling probe or a sintered metal filter.

[0011] Preferably, the purging branch pipe is connected to the purging main pipe via a tee connector.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. This utility model performs steam backflushing at regular intervals and uses a gas source for gas protection when the analyzer is in use. The steam backflushing at regular intervals prevents crystallization and removes the crystallized material, ensuring that the pipeline is free of crystals or has only a small amount of crystals.

[0014] 2. This utility model has a steam backflushing function for the sampling pipeline of the in-situ analyzer, which solves the problem that the gas backflushing of the existing technology cannot effectively dissolve crystals, is difficult to destroy the stubborn crystal structure formed by tar, asphalt and other substances, and has a limited unblocking effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a steam backflushing device for an in-situ analyzer sampling pipeline according to one embodiment.

[0017] In the above diagram, 1. In-situ analyzer, 2. Sampling line, 3. Sampler, 4. Purge branch pipe, 5. Purge main pipe, 6. First solenoid valve, 7. First check valve, 8. Protective air source, 9. Second solenoid valve, 10. Second check valve, 11. Purge steam source, 12. Controller, 13. Steam pressure reducing valve. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Example 1, such as Figure 1As shown, an in-situ analyzer sampling pipeline steam backflushing device includes an in-situ analyzer 1, which is the core detection equipment, analyzing the components of process gases such as tar, benzene, and naphthalene in real time online, requiring continuous acquisition of unblocked and uncontaminated sample gases. Sampling pipelines 2 are arranged on both sides of the in-situ analyzer 1, and samplers 3 are arranged at the ends of the sampling pipelines 2. The sampling pipelines 2 deliver process gases to the in-situ analyzer 1, and the samplers 3 perform preliminary filtration of large particulate impurities.

[0021] A purge branch pipe 4 is connected to the sampler 3 and sampling line 2. The purge branch pipe 4 is directly connected to the high-contamination area to achieve precise backflushing. The purge branch pipe 4 is connected to the purge main pipe 5. The purge main pipe 5 is divided into a first pipeline and a second pipeline at both ends. The first pipeline is equipped with a first solenoid valve 6 and a first check valve 7, which are connected to the protective air source 8. The first solenoid valve 6 controls the air supply and the first check valve 7 prevents steam or process gas backflow. The protective air source 8 provides dry and clean compressed air or nitrogen. After backflushing, condensate in the pipeline is removed to avoid interfering with the analysis. Low-frequency gas backflushing delays crystallization.

[0022] The second pipeline is equipped with a second solenoid valve 9 and a second check valve 10 connected to the purge steam source 11. The second solenoid valve 9 controls the steam flow; the second check valve 10 prevents gas or condensate from backflowing and contaminating the steam source, ensuring that the steam backflushing starts and stops according to the program and avoiding media cross-contamination. The purge steam source 11 provides high-temperature saturated steam, with a typical steam temperature of 150℃+. The heat of the steam melts tar / asphalt crystals, and the expansion force of the steam peels off stubborn deposits, completely solving the problem of viscous crystal blockage that gas backflushing cannot handle.

[0023] The specific design of the aforementioned key components will be discussed in detail below:

[0024] It also includes a controller 12, which is electrically connected to the first solenoid valve 6 and the second solenoid valve 9. The controller 12 is preferably a programmable logic controller (PLC) 12, which triggers the backflush logic based on time or conditions for fully automatic operation, avoiding human error; the adjustable timing matches different working conditions. The workflow is as follows:

[0025] 1. Steam backflushing stage: Open the second solenoid valve 9, and high-temperature steam will continuously flush the pipeline for 30 to 60 seconds;

[0026] 2. Air purging stage: Close the second solenoid valve 9, open the first solenoid valve 6, purge residual steam and dry the pipeline;

[0027] 3. Daily protection: When the analyzer is running, the first solenoid valve 6 is opened for intermittent short-term air backflushing.

[0028] The first check valve 7 is installed with the protective air source 8 leading to the purge main pipe 5, and the second check valve 10 is installed with the purge steam source 11 leading to the purge main pipe 5. The directional installation of the first check valve 7 and the second check valve 10 strictly isolates the steam and air circuits, preventing cross-contamination and avoiding condensate contamination of the air source or damage to the instruments from high-temperature steam. The purge main pipe 5 integrates both steam and air sources. The purge branch pipe 4 is connected to the purge main pipe 5 via a tee connector, distributing the purge to each sampling point. This compact structure reduces the complexity and cost of multi-channel independent systems.

[0029] A steam pressure reducing valve 13 is connected in series between the purging steam source 11 and the second solenoid valve 9 on the second pipeline. The steam pressure reducing valve 13 regulates the steam pressure to a safe range, preventing high-pressure steam from damaging the in-situ analyzer 1 or sealing components, ensuring system safety, and adapting to different steam pressure conditions.

[0030] The sampler 3 is either a porous ceramic sampling probe or a sintered metal filter. When the gas temperature is >600℃ and highly corrosive, requiring high filtration accuracy such as for analyzing trace benzene compounds, the porous ceramic sampling probe sampler 3 is preferred. When operating under conditions of mechanical vibration or pressure pulsation, frequent thermal cycling, or requiring resistance to hydrogen embrittlement, the sintered metal filter sampler 3 is preferred.

[0031] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A steam backflushing device for sampling pipelines of an in-situ analyzer, comprising an in-situ analyzer, wherein sampling pipelines are arranged on both sides of the in-situ analyzer, characterized in that, A sampler is installed at the end of the sampling pipeline. A purge branch pipe is connected to the sampler and the sampling pipeline. The purge branch pipe is connected to the purge main pipe. The purge main pipe is divided into a first pipeline and a second pipeline at both ends. A first solenoid valve and a first check valve are installed on the first pipeline and connected to the protective air source. A second solenoid valve and a second check valve are installed on the second pipeline and connected to the purge steam source.

2. The in-situ analyzer sampling pipeline steam backflushing device according to claim 1, characterized in that, It also includes a controller, which is electrically connected to the first solenoid valve and the second solenoid valve.

3. A steam backflushing device for an in-situ analyzer sampling pipeline according to claim 1 or 2, characterized in that, The first check valve is installed with the protective air source flowing to the purge main pipe, and the second check valve is installed with the purge steam source flowing to the purge main pipe.

4. The in-situ analyzer sampling pipeline steam backflushing device according to claim 1, characterized in that, A steam pressure reducing valve is connected in series between the purging steam source and the second solenoid valve on the second pipeline.

5. A steam backflushing device for an in-situ analyzer sampling pipeline according to claim 1, characterized in that, The sampler is a porous ceramic sampling probe or a sintered metal filter.

6. The in-situ analyzer sampling pipeline steam backflushing device according to claim 1, characterized in that, The purging branch pipe is connected to the purging main pipe via a tee connector.

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