Emergency bypass device for h2s removal system in sulphur-burning plants
By introducing an emergency bypass device into the sulfuric acid production process, the problem of a complete shutdown caused by HRS system failure was solved, enabling non-stop switching when the HRS tower fails, and improving the system's continuous operation stability and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN YUNTIANHUA YUNFENG CHEM CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-14
AI Technical Summary
When the HRS system fails, the sulfuric acid production process must be shut down completely, resulting in significant economic losses, long restart times, and severe equipment corrosion. The existing ammonia-based desulfurization process cannot guarantee the stable operation of the tail gas absorption unit.
Design an emergency bypass device, including an inlet pipe, an HRS tower, an outlet pipe, and a bypass pipe, equipped with a regulating valve assembly and a DCS interlock control system, so that in the event of a fault, the furnace gas can directly enter the absorption tower through the bypass, ensuring continuous operation of the system.
In the event of an HRS tower failure, a bypass device enables non-stop switching, improving the system's continuous operational stability, reducing production losses and equipment corrosion, and minimizing downtime.
Smart Images
Figure CN224485459U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical production equipment, specifically to an emergency bypass device for the HRS system in a sulfuric acid production process. Background Technology
[0002] In the sulfuric acid production process, SO2-containing furnace gas is sequentially absorbed by an HRS (High-Speed Reduction) tower and a primary absorption tower. In traditional processes, the HRS tower operates in series with downstream equipment. When the HRS system malfunctions (e.g., due to a circulating pump failure, acid pipe leak, or evaporator failure), a complete shutdown for maintenance is necessary, leading to:
[0003] 1. A single parking incident resulted in significant economic losses, with direct economic losses exceeding 100,000 yuan;
[0004] 2. Restarting takes ≥24 hours, affecting continuous production;
[0005] 3. Frequent start-up and shutdown exacerbate equipment corrosion.
[0006] Therefore, the original ammonia-based desulfurization process has a technical defect that cannot guarantee the stable operation of the tail gas absorption device.
[0007] Therefore, when the HRS system malfunctions, it must be dealt with immediately. Failure to do so in a timely or appropriate manner will result in the shutdown of the unit and even cause a series of problems such as excessive SO2 emissions in the exhaust gas.
[0008] In view of this, we propose an emergency bypass device for the HRS system in the sulfuric acid production process. Utility Model Content
[0009] The purpose of this invention is to provide an emergency bypass device for the HRS system in a sulfuric acid production process, which can ensure the continuous operation of the suction tower when the HRS tower fails, thereby solving the defects mentioned in the background art.
[0010] To achieve the above objectives, this utility model provides the following technical solution:
[0011] An emergency bypass device for an HRS system in a sulfuric acid production process includes an inlet pipe, an HRS tower, an outlet pipe, and an absorption tower connected in sequence. A bypass pipe connects the inlet pipe and the outlet pipe. Regulating valve assemblies for adjusting gas flow direction are provided on the inlet pipe, the outlet pipe, and the bypass pipe. When the HRS tower is operating normally, SO2-containing furnace gas flows sequentially through the inlet pipe, the HRS tower, the outlet pipe, and the absorption tower. When the HRS tower malfunctions, SO2-containing furnace gas flows sequentially through the inlet pipe, the bypass pipe, the outlet pipe, and the absorption tower.
[0012] As a further improvement, the inner wall of the bypass pipe is lined with an acid-resistant material layer.
[0013] As a further improvement, the regulating valve assembly includes a first shut-off valve installed on the intake pipe, a second shut-off valve installed on the outlet pipe, an inlet end of the bypass pipe connected to the intake pipe on the intake side of the first shut-off valve, an outlet end of the bypass pipe connected to the outlet pipe on the outlet side of the second shut-off valve, and an emergency switching valve installed on the bypass pipe.
[0014] As a further improvement, the first shut-off valve, the second shut-off valve, and the emergency switching valve are all pneumatic quick-opening valves.
[0015] As a further improvement, a DCS interlocking control system is also included, which is signal-connected to the first shut-off valve, the second shut-off valve, and the emergency switching valve, respectively.
[0016] As a further improvement, the regulating valve assembly includes a reversing valve, which has a gas inlet, a gas outlet I, and a gas outlet II. The inlet pipe includes a front pipe and a rear pipe. The outlet end of the front pipe is connected to the gas inlet, the inlet end of the rear pipe is connected to the gas outlet I, and the outlet end of the rear pipe is connected to the HRS tower. An outlet check valve is installed on the outlet pipe, which connects the HRS tower to the absorption tower. The inlet end of the bypass pipe is connected to the gas outlet II, and the outlet end of the bypass pipe is connected to the outlet pipe on the outlet side of the outlet check valve.
[0017] As a further improvement, when the HRS tower is operating normally, the regulating valve connects the gas inlet and the gas outlet I; when the HRS tower malfunctions, the regulating valve connects the gas inlet and the gas outlet II.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] When the HRS tower malfunctions, the regulating valve assembly is adjusted so that the SO2-containing furnace gas can directly enter the suction tower through the bypass pipeline, achieving a non-stop switching. This solves the technical problem of the entire line shutting down due to HRS system failure in traditional processes, significantly improves the stability of continuous system operation, and reduces production losses. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention;
[0022] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model;
[0023] Figure 3 This is a schematic diagram of the reversing valve in Embodiment 2 of this utility model.
[0024] In the diagram: 1-Inlet pipe; 101-Front section pipe; 102-Rear section pipe; 2-HRS tower; 3-Outlet pipe; 4-Absorption tower; 5-Bypass pipe; 6-First shut-off valve; 7-Second shut-off valve; 8-Emergency switching valve; 9-Reversing valve; 10-Valve body; 11-Valve cavity; 12-Valve core; 13-Valve stem; 14-Handle; 15-Gas inlet; 16-Gas outlet I; 17-Gas outlet II; 18-Flow hole; 19-Fan-shaped opening; 20-Outlet check valve. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Example 1:
[0027] like Figure 1 As shown, an emergency bypass device for the HRS system in a sulfuric acid production process includes an inlet pipe 1, an HRS tower 2, an outlet pipe 3, and an absorption tower 4 connected in sequence. The inlet end of the inlet pipe 1 is supplied with furnace gas containing SO2.
[0028] A bypass pipe 5 is connected between the intake pipe 1 and the exhaust pipe 3. The inner wall of the bypass pipe 5 is lined with an acid-resistant material layer, which is PTFE or Hastelloy C-276.
[0029] The intake pipe 1, the outlet pipe 3, and the bypass pipe 5 are equipped with regulating valve assemblies for adjusting the gas flow direction. The regulating valve assembly includes a first shut-off valve 6 installed on the intake pipe 1, a second shut-off valve 7 installed on the outlet pipe 3, the inlet end of the bypass pipe 5 connected to the intake pipe 1 on the intake side of the first shut-off valve 6, the outlet end of the bypass pipe 5 connected to the outlet pipe 3 on the outlet side of the second shut-off valve 7, and an emergency switching valve 8 installed on the bypass pipe 5.
[0030] When HRS tower 2 is operating normally, the first shut-off valve 6 and the second shut-off valve 7 are in the open state, and the emergency switching valve 8 is in the closed state. The SO2-containing furnace gas flows through the inlet pipe 1, HRS tower 2, outlet pipe 3 and absorption tower 4 in sequence. When HRS tower 2 malfunctions, the first shut-off valve 6 and the second shut-off valve 7 are closed and the emergency switching valve 8 is opened. The SO2-containing furnace gas directly enters the absorption tower 4 through the inlet pipe 1, bypass pipe 5 and outlet pipe 3, realizing non-stop switching.
[0031] The first shut-off valve 6, the second shut-off valve 7, and the emergency switching valve 8 are all pneumatic quick-opening valves with a response time of ≤5 seconds. It also includes a DCS interlocking control system, which is signal-connected to the first shut-off valve 6, the second shut-off valve 7, and the emergency switching valve 8, respectively.
[0032] When an abnormal temperature difference in the HRS tower or abnormal vibration of the outlet HRS pump is detected, the DCS interlock control system receives the HRS fault signal and triggers the interlock procedure. The DCS interlock control system controls the first shut-off valve 6 and the second shut-off valve 7 to close and the emergency switching valve 8 to open, quickly completing the valve switching.
[0033] Example 2:
[0034] like Figure 2 and Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that the regulating valve assembly includes a reversing valve 9, the reversing valve 9 includes a valve body 10, a cylindrical valve cavity 11 is provided inside the valve body 10, a cylindrical valve core 12 is rotatably installed inside the valve cavity 11, a valve stem 13 is fixedly installed on the valve core 12, one end of the valve stem 13 extends out of the outside of the valve body 10 and a handle 14 is fixedly installed thereon; the valve body 10 is provided with a gas inlet 15, a gas outlet I 16 and a gas outlet II 17 communicating with the inner peripheral wall of the valve cavity 11, the gas inlet 15, the gas outlet I 16 and the gas outlet II 17 are distributed circumferentially around the valve cavity 11, the outer peripheral wall of the valve core 12 is provided with a flow hole 18 that is radially through it, one end of the flow hole 18 is provided with a fan-shaped opening 19, when the end of the flow hole 18 away from the fan-shaped opening 19 is aligned with the gas outlet I 16 or the gas outlet II 17, the fan-shaped opening 19 is connected to the gas inlet 15.
[0035] The intake pipe 1 includes a front pipe 101 and a rear pipe 102. The inlet end of the front pipe 101 is fed with furnace gas containing SO2, and the outlet end is connected to the gas inlet 15. The inlet end of the rear pipe 102 is connected to the gas outlet I 16, and the outlet end of the rear pipe 102 is connected to the HRS tower 2. The outlet pipe 3 is equipped with an outlet check valve 20 that connects the HRS tower 2 to the absorption tower 4. The inlet end of the bypass pipe 5 is connected to the gas outlet II 17, and the outlet end of the bypass pipe 5 is connected to the outlet pipe 3 on the outlet side of the outlet check valve 20.
[0036] When HRS tower 2 is running normally, rotating handle 14 drives valve core 12 to rotate, aligning the end of flow hole 18 away from fan-shaped opening 19 with gas outlet I 16. Reversing valve 9 connects gas inlet 15 and gas outlet I 16, and SO2-containing furnace gas flows through front pipeline 101, rear pipeline 102, HRS tower 2, gas outlet pipeline 3 and absorption tower 4 in sequence.
[0037] When HRS tower 2 malfunctions, rotating handle 14 drives valve core 12 to rotate, aligning the end of flow hole 18 away from fan-shaped opening 19 with gas outlet II 17. Reversing valve 9 connects gas inlet 15 and gas outlet II 17, allowing SO2-containing furnace gas to directly enter absorption tower 4 through front pipeline 101, bypass pipeline 5, and outlet pipeline 3.
[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. An emergency bypass device for the HRS system in a sulfuric acid production process, characterized in that: The system includes an inlet pipe, an HRS tower, an outlet pipe, and an absorption tower connected in sequence. A bypass pipe connects the inlet pipe and the outlet pipe. The inlet pipe, the outlet pipe, and the bypass pipe are equipped with regulating valve assemblies for adjusting the gas flow direction. When the HRS tower is operating normally, SO2-containing furnace gas flows sequentially through the inlet pipe, the HRS tower, the outlet pipe, and the absorption tower. When the HRS tower malfunctions, SO2-containing furnace gas flows sequentially through the inlet pipe, the bypass pipe, the outlet pipe, and the absorption tower.
2. The emergency bypass device for the HRS system in a sulfuric acid production process as described in claim 1, characterized in that: The inner wall of the bypass pipe is lined with an acid-resistant material layer.
3. The emergency bypass device for the HRS system in a sulfuric acid production process as described in claim 1, characterized in that: The regulating valve assembly includes a first shut-off valve installed on the intake pipe, a second shut-off valve installed on the outlet pipe, an inlet end of a bypass pipe connected to the intake pipe on the intake side of the first shut-off valve, an outlet end of the bypass pipe connected to the outlet pipe on the outlet side of the second shut-off valve, and an emergency switching valve installed on the bypass pipe.
4. The emergency bypass device for the HRS system in a sulfuric acid production process as described in claim 3, characterized in that: The first shut-off valve, the second shut-off valve, and the emergency switching valve are all pneumatic quick-opening valves.
5. The emergency bypass device for the HRS system in a sulfuric acid production process as described in claim 4, characterized in that: It also includes a DCS interlocking control system, which is connected to the first shut-off valve, the second shut-off valve and the emergency switching valve respectively.
6. The emergency bypass device for the HRS system in a sulfuric acid production process as described in claim 1, characterized in that: The regulating valve assembly includes a reversing valve, which has a gas inlet, a gas outlet I, and a gas outlet II. The inlet pipe includes a front pipe and a rear pipe. The outlet end of the front pipe is connected to the gas inlet, the inlet end of the rear pipe is connected to the gas outlet I, and the outlet end of the rear pipe is connected to the HRS tower. An outlet check valve is installed on the outlet pipe, which connects the HRS tower to the absorption tower. The inlet end of the bypass pipe is connected to the gas outlet II, and the outlet end of the bypass pipe is connected to the outlet pipe on the outlet side of the outlet check valve.
7. The emergency bypass device for the HRS system in a sulfuric acid production process as described in claim 6, characterized in that: When the HRS tower is operating normally, the regulating valve connects the gas inlet and the gas outlet I; when the HRS tower malfunctions, the regulating valve connects the gas inlet and the gas outlet II.