Desulfurizing tower system capable of avoiding smoke return
By adding horizontal drainage pipelines and breathable pipelines in the desulfurization tower system, the problem of smoke exhaust exhaust gas returning to the process cabin is solved, the effective treatment of smoke exhaust exhaust gas and the satisfaction of TierIII emission standards are achieved, and a simple and easy Row solution.
Patent Information
- Application Number
- CN202411154609.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2024-12-10
AI Technical Summary
The existing desulfurization tower system generates negative pressure during the discharge process, causing the exhaust exhaust gas to flow back into the process compartment, causing the desulfurization tower to smoke return, which cannot be effectively avoided.
Design a desulfurization tower system that avoids smoke recovery. By adding horizontal pipelines to the main and auxiliary machine drainage pipelines, increasing flow resistance, reducing the circulating water drainage speed, and installing breathable pipelines on the process compartment to connect to The air permeable interface of the auxiliary machine desulfurization tower ensures that the exhaust exhaust gas enters the desulfurization tower for treatment, and cancels the air head to prevent exhaust gas from being discharged.
It effectively avoids the return of the exhaust exhaust gas to the process compartment, realizes the complete entry of the exhaust exhaust exhaust gas into the desulfurization tower, meets the TierIII emission standards, and the solution is simple and easy to implement, without requiring complex valves or logic control.
Smart Images
Figure CN119098028A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of construction and design of shipping LNG storage tanks, and in particular relates to a desulfurization tower system for avoiding smoke return. Background Art
[0002] At present, most ships have chosen to install a desulfurization system to ensure desulfurization when burning high-sulfur oil, and ultimately meet the Tier III emission requirements. The most commonly used is the hybrid desulfurization system, which includes a desulfurization tower and a process tank. The desulfurization tower is generally arranged in the chimney, and the exhaust gas enters the desulfurization tower through the exhaust pipe. In the case of a closed cycle, the circulating water in the desulfurization tower washes the exhaust gas by spraying, thereby achieving the purpose of desulfurization. The washed circulating water enters the process tank through the discharge pipe below the desulfurization tower, and the exhaust gas is discharged to the atmosphere through the exhaust pipe at the top of the desulfurization tower. However, due to the large amount of circulating water sprayed, a large amount of circulating water is discharged downward at a high speed during the downward discharge of circulating water, forming a certain negative pressure in the discharge pipeline, and carrying the exhaust gas downward to the process cabin. In addition, due to the high temperature of the exhaust gas and the spraying of circulating water, some steam is generated, resulting in a certain positive pressure of about 800Pa in the desulfurization tower. In the process cabin, since the air head is installed on the process cabin and connected to the atmosphere, it can be regarded as an open cabin cabinet. There is no pressure in the cabin, which will also cause the exhaust gas to flow downward through the discharge pipe into the process cabin. When the exhaust gas enters the process cabin, it will be discharged through the air head installed on the process cabin, causing a large amount of exhaust gas to gather near the air head, resulting in the phenomenon of smoke backflow in the desulfurization tower. Therefore, it is necessary to provide an effective technical solution to solve this problem. Summary of the invention
[0003] In order to solve the above problems, the present invention provides a desulfurization tower system for avoiding smoke return, aiming to achieve the purpose of avoiding smoke return in the desulfurization tower. The technical solution adopted is: A desulfurization tower system for avoiding smoke return comprises a main engine desulfurization tower and an auxiliary engine desulfurization tower. The main engine desulfurization tower is provided with a main engine discharge pipeline vertically arranged downward, and the auxiliary engine desulfurization tower is provided with an auxiliary engine discharge pipeline vertically arranged downward. A main engine discharge horizontal pipeline and an auxiliary engine discharge horizontal pipeline are respectively added between the main engine discharge pipeline and the auxiliary engine discharge pipeline, and the main engine discharge horizontal pipeline and the auxiliary engine discharge horizontal pipeline are both arranged horizontally.
[0004] The discharge port of the main engine discharge pipeline and the discharge port of the auxiliary engine discharge pipeline are connected to the process cabin from the top of the process cabin. A ventilation pipeline extends from the top of the process cabin and is connected to the ventilation interface of the auxiliary engine desulfurization tower. The ventilation interface and the exhaust port of the auxiliary engine desulfurization tower are symmetrically arranged. The ventilation interface is inside the auxiliary engine desulfurization tower and is in a top-down inclined state. The exhaust gas in the process cabin enters the auxiliary desulfurization tower through the ventilation pipeline. When the pressure in the process cabin reaches 800pa, the main engine desulfurization tower, the auxiliary engine desulfurization tower and the process cabin reach pressure balance. At this time, the exhaust gas in the process cabin no longer enters the auxiliary desulfurization tower.
[0005] In the above-mentioned desulfurization tower system for avoiding smoke return, further, the process cabin is located below the main engine desulfurization tower and the auxiliary engine desulfurization tower.
[0006] In the above-mentioned desulfurization tower system for avoiding smoke backflow, further, the air permeable pipeline is made of glass fiber reinforced plastic GRE or duplex stainless steel SS2205.
[0007] The above-mentioned desulfurization tower system for avoiding smoke return, further, has a spray device arranged in the main desulfurization tower and the auxiliary desulfurization tower.
[0008] The above-mentioned desulfurization tower system for avoiding smoke backflow further has a high-level alarm device arranged below the air permeable interface.
[0009] The present invention can reduce the negative pressure formed in the pipeline to a certain extent and prevent the exhaust gas from flowing back to the process cabin, especially for ships with double desulfurization, by optimizing the layout of the discharge pipeline, increasing the flow resistance of the main engine discharge horizontal pipeline and the auxiliary engine discharge horizontal pipeline, and reducing the discharge rate of the circulating water. In order to prevent the exhaust gas from being discharged through the air head of the process cabin, it is necessary to cancel the air head of the process cabin, add a ventilation pipeline to the process cabin, and connect the end of the pipeline to the desulfurization tower. Ventilation is carried out through the desulfurization tower, and then excess flue gas will only enter the desulfurization tower, and will not be discharged through the air head. For ships that have been delivered or have discovered this problem during construction, there is no need to add complex valves and logic controls, nor is there any need to accurately calculate the flow resistance of the discharge pipeline. The present invention is the simplest and most reliable solution. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the main engine desulfurization tower, auxiliary engine desulfurization tower and process cabin reaching pressure balance; Among them, 1-main engine desulfurization tower, 2-auxiliary engine desulfurization tower, 3-process chamber, 4-main engine discharge pipeline, 5-auxiliary engine discharge pipeline, 6-ventilation pipeline, 7-ventilation interface, 8-main engine discharge horizontal pipeline, 9-auxiliary engine discharge horizontal pipeline. DETAILED DESCRIPTION
[0011] The present invention will be further described in conjunction with the accompanying drawings.
[0012] like Figure 1 A desulfurization tower system for avoiding smoke return is shown, in which the main engine desulfurization tower and the auxiliary engine desulfurization tower are located above the process cabin, the main engine desulfurization tower has a vertically arranged main engine discharge pipeline, and the auxiliary engine desulfurization tower has a vertically arranged auxiliary engine discharge pipeline. A main engine discharge horizontal pipeline 8 and an auxiliary engine discharge horizontal pipeline 9 are respectively added between the main engine discharge pipeline and the auxiliary engine discharge pipeline, and the main engine discharge horizontal pipeline and the auxiliary engine discharge horizontal pipeline are both arranged horizontally. The main purpose is to increase the flow resistance of the circulating water discharge pipeline, reduce the discharge speed of the circulating water to a certain extent, and avoid the formation of negative pressure in the discharge pipeline due to excessive discharge speed, which drives the exhaust gas into the process cabin 3.
[0013] The air head on the process cabin 3 is cancelled, and instead a ventilation pipeline 6 is added to the process cabin. The ventilation pipeline is connected to the ventilation interface 7 of the auxiliary desulfurization tower. The ventilation interface and the exhaust port of the auxiliary desulfurization tower are symmetrically arranged. The ventilation interface is inside the auxiliary desulfurization tower and is in an inclined state from top to bottom, which ensures the ventilation of the process cabin and prevents the exhaust gas in the process cabin 7 from accumulating for a long time and being unable to be discharged. This part of the exhaust gas enters the desulfurization tower and is discharged into the atmosphere through spraying treatment to meet the Tier III sulfur content emission environmental protection requirements.
[0014] The auxiliary desulfurization tower ventilation interface 7 is tilted from top to bottom when entering the desulfurization tower to prevent the spray of the auxiliary desulfurization tower 2 from entering the auxiliary desulfurization tower ventilation interface 7 and affecting the ventilation of the process cabin 3.
[0015] The auxiliary desulfurization tower 2 needs to add a high-level alarm device, the height of which should be lower than the auxiliary desulfurization tower ventilation interface 7. Its main function is to prevent the circulating water in the auxiliary desulfurization tower circulating water discharge pipeline 5 from being discharged smoothly, resulting in the accumulation of circulating water and entering the process cabin ventilation pipeline.
[0016] In addition, for the design of this double desulfurization tower (main engine desulfurization tower 1 and auxiliary engine desulfurization tower 2), when adding the process cabin ventilation pipeline 6, only one ventilation pipeline needs to be added, because when the main engine is running, the auxiliary engine must be running, so when the main engine desulfurization tower is working, the auxiliary engine desulfurization tower must work; while when the auxiliary engine is running, the main engine may not work, so when the auxiliary engine desulfurization tower is working, the main engine desulfurization tower may not work. Therefore, it is necessary to connect the process cabin ventilation pipeline 6 to the auxiliary engine desulfurization tower to ensure that at any time, the exhaust gas entering the desulfurization tower through the process cabin ventilation pipeline 6 can be desulfurized by the working desulfurization tower before being discharged into the atmosphere.
[0017] In addition, since the main engine desulfurization tower 1 and the auxiliary engine desulfurization tower 2 are completely connected with the process chamber 3, the pressure of the process chamber will also increase. When it reaches 800 Pa, the main engine desulfurization tower 1 and the auxiliary engine desulfurization tower 2 reach pressure balance with the process chamber 3. At this time, no exhaust gas will enter the process chamber 6. Figure 2 shown.
[0018] Regarding the material requirements for the process cabin ventilation pipeline, since the ventilation pipeline is in contact with exhaust gas containing a certain amount of seawater, it is corrosive to a certain extent. For the safety of the entire system and main and auxiliary equipment, it is necessary to use fiberglass GRE material or duplex stainless steel SS2205 material. The use of fiberglass GRE material is more economical and easy to construct.
Claims
1. A desulfurization tower system for avoiding smoke return, characterized in that: A main engine desulfurization tower (1) and an auxiliary engine desulfurization tower (2) are provided. The main engine desulfurization tower is provided with a main engine discharge pipeline (4) vertically arranged downwards, and the auxiliary engine desulfurization tower is provided with an auxiliary engine discharge pipeline (5) vertically arranged downwards. A main engine discharge horizontal pipeline (8) and an auxiliary engine discharge horizontal pipeline (9) are respectively provided between the main engine discharge pipeline and the auxiliary engine discharge pipeline. The main engine discharge horizontal pipeline and the auxiliary engine discharge horizontal pipeline are both horizontally arranged. The discharge port of the main engine discharge pipeline and the discharge port of the auxiliary engine discharge pipeline are connected to the process cabin from the top of the process cabin (3). A ventilation pipeline (6) extends from the top of the process cabin and is connected to the ventilation interface (7) of the auxiliary engine desulfurization tower. The ventilation interface and the exhaust port of the auxiliary engine desulfurization tower are symmetrically arranged. The ventilation interface is inside the auxiliary engine desulfurization tower and is in a top-down inclined state. The exhaust gas in the process cabin enters the auxiliary desulfurization tower through the ventilation pipeline. When the pressure in the process cabin reaches 800 Pa, the main engine desulfurization tower, the auxiliary engine desulfurization tower and the process cabin reach pressure balance. At this time, the exhaust gas in the process cabin no longer enters the auxiliary desulfurization tower.
2. A desulfurization tower system for avoiding smoke backflow according to claim 1, characterized in that: The process chamber is located below the main engine desulfurization tower and the auxiliary engine desulfurization tower.
3. A desulfurization tower system for avoiding smoke backflow according to claim 1, characterized in that: The ventilation pipeline is made of glass fiber reinforced plastic GRE or duplex stainless steel SS2205.
4. A desulfurization tower system for avoiding smoke return according to claim 1, characterized in that: Spraying devices are installed in the main engine desulfurization tower and the auxiliary engine desulfurization tower.
5. A desulfurization tower system for avoiding smoke backflow according to claim 1, characterized in that: A high-level alarm device is arranged below the ventilation interface.