An on-line analysis system for converting hydrogen chloride and acetylene

Abstract

The utility model provides a kind of conversion hydrogen chloride, acetylene online analysis system, and the purpose is to solve the technical problems of low efficiency of existing system, with security risk.The system includes: multiple converters, sampling unit and analyzer, and each converter outlet is equipped with sampling port;Sampling unit includes: the sampling pipe connected with each sampling port, the first control valve installed on each sampling pipe, the collecting pipeline connected with the end of the sampling pipe;The input end of analyzer is connected with the collecting pipeline by gas inlet pipe, and the output end is connected with gas outlet pipe, and the second control valve is installed on the gas outlet pipe.The utility model connects to online analyzer after the sampling pipe of each converter is collected, and closed circuit circulation design is used, on the one hand, online analysis sampling no longer needs operating personnel to convert process field sampling, on the other hand, the security risk of manual sampling is completely eliminated, and the risk of operating personnel contacting harmful gas is reduced.

Description

Technical Field

[0001] This utility model relates to the field of calcium carbide PVC production technology, and in particular to an online analysis system for converting hydrogen chloride and acetylene. Background Technology

[0002] Currently, in the calcium carbide-based PVC production process, the detection of hydrogen chloride and acetylene content at the converter outlet mainly relies on manual sampling combined with laboratory gas chromatography analysis. Operators need to collect gas samples from each converter on-site and then send them to the central control room for testing. The entire process is time-consuming, inefficient, and poses certain safety hazards (the long on-site sampling time for operators during the conversion process increases the exposure time of personnel, and vinyl chloride may escape during sample replacement). Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide an online analysis system for converting hydrogen chloride and acetylene, which solves the technical problems of low efficiency and safety hazards of the existing system.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An online analysis system for converting hydrogen chloride and acetylene includes: multiple converters, each converter having a sampling port at its outlet; a sampling unit including: a sampling tube connected to each sampling port; a first control valve installed on each sampling tube; a collection pipeline connected to the end of the sampling tube; and an analyzer whose input end is connected to the collection pipeline via an inlet pipe, and whose output end is connected to an outlet pipe, the outlet pipe being equipped with a second control valve.

[0006] This invention connects the sampling tubes of each converter to the online analyzer and adopts a closed-loop design. On the one hand, online analysis sampling no longer requires operators to sample on-site during the conversion process. On the other hand, it completely eliminates the safety hazards of manual sampling and reduces the risk of operators being exposed to harmful gases.

[0007] Optionally, the system further includes: a cooler, the input of which is connected to the output of a plurality of converters; a combination tower, the input of which is connected to the output of the cooler; wherein the end of the exhaust pipe furthest from the analyzer is connected between the cooler and the combination tower.

[0008] Optionally, the input end of the cooler is connected to an air intake manifold, and the output ends of multiple converters are respectively connected to the air intake manifold through a first pipeline; the output end of the cooler is connected to the input end of the combined tower through a second pipeline, and one end of the outlet pipe is connected to the analyzer, and the other end is connected to the second pipeline.

[0009] Optionally, a degassing device is connected to the intake manifold.

[0010] An online analysis system for converting hydrogen chloride and acetylene includes: multiple converters, each converter outlet having a sampling port; a sampling unit, including: a sampling tube connected to each sampling port; the sampling tube ends in a first branch tube and a second branch tube; the first branch tube ends in a main pipe connected to a main pipe, and a first control valve is installed on the first branch tube; the second branch tube ends in a gas outlet main pipe connected to a gas outlet main pipe, and a fourth control valve is installed on the second branch tube; an analyzer, the analyzer's input end being connected to the main pipe via an inlet pipe, and its output end being connected to the gas outlet main pipe via an outlet pipe, the outlet pipe being equipped with a second control valve, and the gas outlet main pipe being equipped with a fifth control valve.

[0011] This invention connects the sampling tubes from each converter to an online analyzer using a closed-loop design. On one hand, online analysis sampling eliminates the need for on-site sampling by operators during the conversion process; on the other hand, it completely eliminates the safety hazards of manual sampling and reduces the risk of operators being exposed to harmful gases. Furthermore, by splitting the sampling tubes into two paths, the gas is delivered to both the analyzer and the outlet collection pipeline. The control valves are centrally located within a 3-meter radius of the analyzer. This design further shortens the detection time for a single converter (analysis time is approximately 5 minutes per unit, increasing efficiency by more than 6 times). In addition, no personnel are required during operation, effectively reducing labor costs.

[0012] Optionally, the first control valve is located near the analyzer, the first branch pipe and the second branch pipe are connected to the sampling pipe through a three-way valve, and a third control valve is installed on the sampling pipe near the sampling port.

[0013] Optionally, the first control valve is located within 3m ± 0.5m of the analyzer.

[0014] Optionally, the system further includes: a cooler, the input of which is connected to the output of a plurality of converters; and a combination tower, the input of which is connected to the output of the cooler; wherein one end of the exhaust gas collection pipeline is connected between the cooler and the combination tower.

[0015] Optionally, the input end of the cooler is connected to an air intake manifold, and the output ends of multiple converters are respectively connected to the air intake manifold through a first pipeline; the output end of the cooler is connected to the input end of the combined tower through a second pipeline, and one end of the exhaust manifold is connected to the second pipeline.

[0016] Optionally, a degassing device is connected to the intake manifold.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model connects the sampling tubes of each converter to the online analyzer and adopts a closed-loop design. On the one hand, online analysis sampling no longer requires operators to sample on-site during the conversion process. On the other hand, it completely eliminates the safety hazards of manual sampling and reduces the risk of operators being exposed to harmful gases.

[0019] 2. By dividing the sampled gas into two streams after sampling through the sampling tube, the gas is delivered to the analyzer and the outlet gas collection pipeline. The control valves are centrally located within a 3-meter radius of the analyzer. This design further shortens the detection time of a single converter (analysis time is approximately 5 minutes per unit, increasing efficiency by more than 6 times). Furthermore, no personnel are required during operation, effectively reducing labor costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of one embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of Example 2.

[0023] Figure label:

[0024] 1. Converter; 11. First pipeline;

[0025] 21. Sampling tube; 211. First control valve; 212. Third control valve; 22. Main pipe; 23. First branch pipe; 24. Second branch pipe; 241. Fourth control valve; 25. Gas outlet main pipe; 251. Fifth control valve;

[0026] 3. Analyzer; 31. Inlet pipe; 32. Outlet pipe; 321. Second control valve;

[0027] 4. Cooler; 41. Main intake manifold; 42. Secondary piping;

[0028] 5. Combined tower; 6. Tribute removal device. Detailed Implementation

[0029] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of this utility model application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0030] In the description of the embodiments of this utility model application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "end", "side" etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, are only for the convenience of describing the embodiments of this utility model application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this utility model application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this utility model application, "multiple" means two or more, unless otherwise explicitly specified.

[0032] In the embodiments of this utility model application, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model application according to the specific circumstances.

[0033] In the embodiments of this utility model application, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The following disclosure provides many different implementations or examples for carrying out different structures of the embodiments of this utility model application. To simplify the disclosure of the embodiments of this utility model application, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of this utility model application. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of this utility model application; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0035] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0036] Example 1

[0037] like Figure 1 As shown, an online analysis system for converting hydrogen chloride and acetylene includes: multiple converters 1, a sampling unit, and an online analyzer 3.

[0038] Each of the multiple converters 1 has a sampling port at its outlet.

[0039] The sampling unit includes a sampling tube 21 and a collection line 22. The sampling tube 21 is connected to each sampling port, and a first control valve 211 is installed on the sampling tube 21. The collection line 22 is connected to the end of the sampling tube 21.

[0040] The analyzer 3 is located outside the summing pipeline 22. The input end of the analyzer 3 is connected to the summing pipeline 22 through the air inlet pipe 31, and the output end is connected to the air outlet pipe 32. A second control valve 321 is installed on the air outlet pipe 32.

[0041] In this implementation scenario, the online analysis system also includes a cooler 4 and a combined tower 5 connected sequentially downstream of the converter 1 outlet. Specifically, the input end of the cooler 4 is connected to the process gas outlet of each converter 1 via an inlet manifold 41. Optionally, the process gas outlets of multiple converters 1 are respectively connected to the inlet manifold 41 via a first pipe 11. The output end of the cooler 4 is connected to the input end of the combined tower 5 via a second pipe 42. The analyzer 3 is connected to the second pipe 42 via an outlet pipe 32, that is, one end of the outlet pipe 32 is connected to the analyzer 3, and the other end is connected to the second pipe 42.

[0042] Optionally, the first control valve 211 is located near the main pipeline 22.

[0043] Optionally, a third control valve 212 is also provided on the sampling tube 21, and the third control valve 212 is located near the sampling port of the converter 1.

[0044] Optionally, cooler 4 is a graphite cooler.

[0045] Optionally, a degassing device 6 is also connected to the intake manifold 41.

[0046] During use, sampling tube 21 collects a sample of the gas exiting the converter and delivers the gas to the collection pipeline 22. The collection pipeline 22 collects the tail gas from each sampling tube 21 and then enters the online analyzer 3 through the inlet pipe 31. The analyzer 3 receives the tail gas output from the collection pipeline 22 and detects the hydrogen chloride and acetylene content in the gas. The analyzed gas enters the second pipeline 42 between the cooler 4 and the combined tower 5 through the outlet pipe 32 to recover the analyzed tail gas, thus realizing a closed-loop circulation.

[0047] Example 2

[0048] The above embodiments can effectively solve the problem of manual sampling through online analysis technology, but due to the large number of converters (generally 20 to 80 converters are configured), the farthest converter is about 113m away from the analyzer, resulting in a long gas replacement time (about 1 hour / unit), which still cannot meet the needs of real-time production guidance.

[0049] like Figure 2 As shown, this embodiment provides an online analysis system for converting hydrogen chloride and acetylene, including: multiple converters 1, a sampling unit and an online analyzer 3.

[0050] Each of the multiple converters 1 has a sampling port at its outlet. The sampling unit includes a sampling tube 21, a collection pipe 22, a first branch pipe 23 connecting the sampling tube 21 and the collection pipe 22, and a second branch pipe 24 connecting the sampling tube 21 and the gas outlet collection pipe 25.

[0051] Specifically,

[0052] One end of each of the multiple sampling tubes 21 is connected to the sampling port of the corresponding converter 1, and the other end of the sampling tubes 21 is connected to the first branch tube 23 and the second branch tube 24 respectively through a tee.

[0053] The end of the first branch pipe 23 furthest from the sampling pipe 21 is connected to the main pipe 22. In this embodiment, a first control valve 211 is installed on the first branch pipe 23, and a third control valve 212 is installed on the sampling pipe 21.

[0054] The end of the second branch pipe 24 furthest from the sampling pipe 21 is connected to the gas outlet collection pipe 25, and a fourth control valve 241 is installed on the second branch pipe 24.

[0055] One end of the exhaust manifold 25 is connected to the second manifold 42 between the cooler 4 and the combined tower 5, and a fifth control valve 251 is installed on the exhaust manifold 25 near the second manifold 42.

[0056] The analyzer 3 is located outside and adjacent to the summing pipeline 22. The input end of the analyzer 3 is connected to the summing pipeline 22 through the air inlet pipe 31, and the output end is connected to the air outlet summing pipeline 25 through the air outlet pipe 32. A second control valve 321 is installed on the air outlet pipe 32.

[0057] Optionally, the first control valve 211 is located near the main pipeline 22, and the third control valve 212 is located near the sampling port.

[0058] Optionally, the third control valve 212 is centrally installed within a range of 3-5m from the online analyzer 3. Preferably, it is 3m ± 0.5m from the analyzer.

[0059] Optionally, the third control valve 212 can be an electromagnetic shut-off valve, and the other control valves can be ball valves.

[0060] In one implementation scenario, the online analysis system further includes a cooler 4 and a combined tower 5, which are sequentially connected downstream of the outlet of converter 1. Specifically, the input end of cooler 4 is connected to the process gas outlet of each converter 1 via an inlet manifold 41. Optionally, the process gas outlets of multiple converters 1 are respectively connected to the inlet manifold 41 via a first pipe 11. The output end of cooler 4 is connected to the input end of combined tower 5 via a second pipe 42.

[0061] Optionally, cooler 4 is a graphite cooler.

[0062] Optionally, a degassing device 6 is also connected to the intake manifold 41.

[0063] In use, sampling tube 21 collects a sample of the gas from the converter outlet and divides the gas into two streams for transport. One stream is transported to the main pipeline 22 via the first branch pipe 23, and the other stream is transported to the outlet main pipeline 25 via the second branch pipe 24. The main pipeline 22 collects the gas from each sampling tube 21 and then transports it to the online analyzer 3 via the inlet pipe 31. The analyzer 3 receives the gas output from the main pipeline 22 and detects the hydrogen chloride and acetylene content in the gas. After analysis, the tail gas returns to the second pipeline 42 between the cooler 4 and the combined tower 5 via the outlet pipe 32, realizing a closed-loop circulation. A portion of the gas collected by the sampling tube 21 can enter the outlet main pipeline 25 via the second branch pipe 24, and finally enter the second pipeline 42 between the cooler 4 and the combined tower 5.

[0064] In this embodiment, sampling tubes are installed at the outlets of the post-converters next to the online analyzer, and the gas is collected and sent to the next process. Each converter sampling tube is equipped with a T-junction, and a portion of the gas is diverted to the analyzer through the first control valve. The first control valve is centrally installed next to the analyzer (about 3m away from the analyzer). The analysis and detection time is basically 5 minutes per unit, achieving 6 to 8 cycles per day, improving efficiency by 6 times.

[0065] It should be noted that the number of converters 1 can be set as needed during use. In the accompanying drawings of this utility model, the converters are only shown schematically. It should be understood that each sampling tube is connected to a converter.

[0066] Any aspects not described in detail in this embodiment are techniques known in the art.

[0067] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An online analysis system for converting hydrogen chloride and acetylene, characterized in that, include: Multiple converters, each equipped with a sampling port; Sampling unit, including: Sampling tubes connected to each sampling port; The first control valve installed on each sampling tube; A collection line connecting to the end of the sampling tube; The analyzer has an input end connected to the collection pipeline via an air inlet pipe and an output end connected to an air outlet pipe, on which a second control valve is installed.

2. The online analysis system for converting hydrogen chloride and acetylene according to claim 1, characterized in that, The system also includes: A cooler, the input of which is connected to the output of multiple converters; The combined tower has its input end connected to the output end of the cooler; The end of the gas outlet pipe furthest from the analyzer is connected between the cooler and the combined tower.

3. The online analysis system for converting hydrogen chloride and acetylene according to claim 2, characterized in that, The input end of the cooler is connected to the main air inlet pipe, and the output ends of multiple converters are respectively connected to the main air inlet pipe through the first pipe; the output end of the cooler is connected to the input end of the combined tower through the second pipe, and one end of the outlet pipe is connected to the analyzer, and the other end is connected to the second pipe.

4. The online analysis system for converting hydrogen chloride and acetylene according to claim 3, characterized in that, A degassing device is connected to the intake manifold.

5. An online analysis system for converting hydrogen chloride and acetylene, characterized in that, include: Multiple converters, each equipped with a sampling port; Sampling unit, including: Sampling tubes connected to each sampling port; The sampling tube is connected to a first branch tube and a second branch tube at its end; The first branch pipe is connected to the main pipe at its end, and a first control valve is installed on the first branch pipe; The second branch pipe is connected to the gas outlet main pipe, and a fourth control valve is installed on the second branch pipe; The analyzer has its input end connected to the collection pipeline via an air inlet pipe and its output end connected to the air outlet collection pipeline via an air outlet pipe. A second control valve is installed on the air outlet pipe, and a fifth control valve is installed on the air outlet collection pipeline.

6. The online analysis system for converting hydrogen chloride and acetylene according to claim 5, characterized in that, The first control valve is located near the analyzer; the first branch pipe and the second branch pipe are connected to the sampling pipe through a three-way valve; a third control valve is installed on the sampling pipe near the sampling port.

7. The online analysis system for converting hydrogen chloride and acetylene according to claim 5, characterized in that, The first control valve is within 3m ± 0.5m of the analyzer.

8. The online analysis system for converting hydrogen chloride and acetylene according to claim 5, 6, or 7, characterized in that, The system also includes: A cooler, the input of which is connected to the output of multiple converters; The combined tower has its input end connected to the output end of the cooler; One end of the gas outlet collection pipeline is connected between the cooler and the combined tower.

9. The online analysis system for converting hydrogen chloride and acetylene according to claim 8, characterized in that, The input end of the cooler is connected to the main air intake pipe, and the output ends of multiple converters are respectively connected to the main air intake pipe through a first pipe; the output end of the cooler is connected to the input end of the combined tower through a second pipe, and one end of the exhaust collection pipe is connected to the second pipe.

10. The online analysis system for converting hydrogen chloride and acetylene according to claim 9, characterized in that, A degassing device is connected to the intake manifold.

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