Anti-blocking device for sampling point of process gas in process of preparing sulfur by using Claus method

Abstract

The utility model relates to an anti-blocking device for a sampling point of a process gas in a process of preparing sulfur by a Claus method, which comprises a process gas pipeline, a sampling pipe, a sampling valve, a back-blowing pipe, a nitrogen valve, a nitrogen source, a first nitrogen isolation hand valve, a nitrogen main pipe and a second nitrogen isolation hand valve, the process gas pipeline is connected with the sampling pipe, the sampling pipe is connected with the back-blowing pipe, and the sampling valve and the nitrogen valve are positioned on the back-blowing pipe; the blowback pipe is connected with the nitrogen main pipe, the nitrogen main pipe is connected with a nitrogen source, and the first nitrogen isolation hand valve and the second nitrogen isolation hand valve are located on the nitrogen main pipe. According to the device, nitrogen is adopted as back flushing gas which is the same as protection nitrogen of a catalyst bed layer and a sulfur production combustion furnace in a Claus method sulfur production process, and the back flushing nitrogen has no great influence on operation, namely index control, of the sulfur recovery device, and has no potential safety hazard on operation of the device as inert gas.

Description

Technical Field

[0001] The utility model relates to the fields of petrochemical industry and coal chemical industry, and in particular to a gas sampling point anti-blocking device for a Claus process sulfur production process. Background Art

[0002] In industries like petrochemicals and coal chemical industry, sulfur vapor sampling from sulfur recovery units is necessary. Currently, the most common method involves inserting a sampling tube into the process gas pipeline. During the sampling process, sulfur vapor freezes at 120°C, while the sampling bag or the end of the sampling line is relatively cold, which can easily cause sulfur vapor to condense and clog the sampling tube. Once clogged, the sampling tube must be unblocked, typically using open flames or electrical heating to melt the solid sulfur inside and evaporate it into gaseous sulfur vapor. This method is cumbersome and labor-intensive. Utility Model Content

[0003] In order to solve the defects of frequent clogging of sampling tubes and low dredging efficiency in the existing Claus sulfur recovery sampling process, the utility model aims to provide a Claus sulfur process gas sampling point anti-clogging device.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a Claus process sulfur production process gas sampling point anti-blocking device, including a process gas pipeline 1, a sampling tube 2, a sampling valve 3, a backflush tube 4, a nitrogen valve 5, a nitrogen source 6, a first nitrogen isolation manual valve 7, a nitrogen main pipe 8, and a second nitrogen isolation manual valve 9.

[0005] The process gas pipeline 1 is connected to the sampling tube 2, the sampling tube 2 is connected to the backflush tube 4, the sampling valve 3 and the nitrogen valve 5 are located on the backflush tube 4, the backflush tube 4 is connected to the nitrogen main tube 8, the nitrogen main tube 8 is connected to the nitrogen source 6, and the first nitrogen isolation hand valve 7 and the second nitrogen isolation hand valve 9 are located on the nitrogen main tube 8.

[0006] Furthermore, the sampling valve 3 and the nitrogen valve 5 are at the same distance from the connection point of the sampling tube 2 and the backflush tube 4 .

[0007] Furthermore, the sampling valve 3 is located near the sampling port, and the nitrogen valve 5 is located near the nitrogen source 6 .

[0008] Furthermore, the nitrogen source 6 supplies gas to multiple sampling devices through a nitrogen main pipe 8 .

[0009] Compared with the existing Claus process sulfur production process gas sampling device, the utility model has the following advantages.

[0010] The utility model discloses a device for preventing blocking of a gas sampling point in a Claus sulfur production process. The device adopts nitrogen as back-blowing gas, which is the same as the nitrogen protecting the catalyst bed and the sulfur production combustion furnace in the Claus sulfur production process. The back-blowing nitrogen in the utility model has little influence on the operation of the sulfur recovery device, i.e., the index control, and as an inert gas, there is no safety hazard to the operation of the device.

[0011] The utility model discloses a gas sampling point anti-blocking device for a Claus sulfur production process. The device has a simple structure and is easy to transform. The condensation blockage problem of the sampling tube is solved only by purging nitrogen. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a diagram of an anti-blocking device for a gas sampling point in a Claus sulfur production process according to the utility model. DETAILED DESCRIPTION

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0014] In the description of the present invention, it should be noted that the terms "top", "bottom", "one side", "the other side", "front", "back", "middle", "inside", "top", "bottom end", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified or limited, the terms "mounted", "connected", and "connected" should be understood in a broad sense, for example, they can mean fixed connection, detachable connection, or integral connection; they can mean mechanical connection or electrical connection; they can mean direct connection, indirect connection through an intermediate medium, or internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] The present invention will be described in further detail below with reference to the accompanying drawings.

[0016] like Figure 1As shown, the utility model provides a process gas sampling point anti-blocking device for a Claus process sulfur production process, comprising a process gas pipeline 1, a sampling tube 2, a sampling valve 3, a backflush tube 4, a nitrogen valve 5, a nitrogen source 6, a first nitrogen isolation manual valve 7, a nitrogen main pipe 8, and a second nitrogen isolation manual valve 9.

[0017] The process gas pipeline 1 is connected to the sampling tube 2, the sampling tube 2 is connected to the backflush tube 4, the sampling valve 3 and the nitrogen valve 5 are located on the backflush tube 4, and the sampling valve 3 and the nitrogen valve 5 are at the same distance from the connection point of the sampling tube 2 and the backflush tube 4. The sampling valve 3 is on the side close to the sampling port, and the nitrogen valve 5 is on the side close to the nitrogen source 6. The backflush tube 4 is connected to the nitrogen main tube 8, and the nitrogen main tube 8 is connected to the nitrogen source 6. The first nitrogen isolation hand valve 7 and the second nitrogen isolation hand valve 9 are located on the nitrogen main tube 8.

[0018] In this device, nitrogen is emitted by a nitrogen source 6 and enters the backflush pipe 4 through a nitrogen main pipe 8. When sampling is not required, the sampling valve 3 on the backflush pipe 4 is in a closed state and the nitrogen valve 5 is in an open state. At this time, nitrogen can pass through the nitrogen valve 5 but cannot pass through the sampling valve 3. The nitrogen will flow through the sampling pipe 2 located between the sampling valve 3 and the nitrogen valve 5 and blow toward the process gas pipeline 1 to prevent sulfur gas from entering the sampling pipe 2 and causing blockage; when sampling is required, the sampling valve 3 is opened and the nitrogen valve 5 is closed. At this time, the nitrogen entering the backflush pipe 4 is blocked by the nitrogen valve 5 and cannot flow. The sulfur gas in the process gas pipeline 1 can pass into the sampling pipe 2 and be transported from the sampling pipe 2 to the sampling port through the backflush pipe 4 to collect the required sulfur gas.

[0019] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0020] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A Claus sulfur production process gas sampling point anti-blocking device, comprising a process gas pipeline (1), a sampling tube (2), a sampling valve (3), a backflush tube (4), a nitrogen valve (5), a nitrogen source (6), a first nitrogen isolation hand valve (7), a nitrogen main pipe (8), and a second nitrogen isolation hand valve (9), characterized in that The process gas pipeline (1) is connected to the sampling tube (2), the sampling tube (2) is connected to the backflush tube (4), the sampling valve (3) and the nitrogen valve (5) are located on the backflush tube (4), the backflush tube (4) is connected to the nitrogen main tube (8), the nitrogen main tube (8) is connected to the nitrogen source (6), and the first nitrogen isolation hand valve (7) and the second nitrogen isolation hand valve (9) are located on the nitrogen main tube (8).

2. The Claus sulfur production process gas sampling point anti-blocking device according to claim 1, characterized in that The sampling valve (3) and the nitrogen valve (5) are at the same distance from the connection point of the sampling tube (2) and the backflush tube (4).

3. The Claus sulfur production process gas sampling point anti-blocking device according to claim 1, characterized in that The sampling valve (3) is located on a side close to the sampling port, and the nitrogen valve (5) is located on a side close to the nitrogen source (6).

4. The Claus sulfur production process gas sampling point anti-blocking device according to claim 1, characterized in that The nitrogen source (6) supplies gas to a plurality of sampling devices through a nitrogen main pipe (8).

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