Tail suction tower with risk spillover control device

Abstract

This utility model discloses a tail-end suction tower with a risk spillover control device, relating to the field of sulfuric acid production processes. It includes a tail-end suction tower body, a circulating pump, and a risk spillover control device. The circulating pump's inlet and outlet are connected, and the circulating liquid inlet is connected to the circulating liquid outlet. The circulating liquid outlet is vertically lower than the circulating liquid inlet. The outlet of an ammonia water pipe is connected to an ammonia water inlet located on the outer wall of the tail-end suction tower body. The ammonia water inlet is vertically higher than the circulating liquid outlet. A first manual valve and a first pneumatic valve are installed on the ammonia water pipe. A pH monitor is installed inside the tail-end suction tower body, close to the circulating liquid outlet. This utility model adjusts the ammonia water inlet position to above the circulating liquid outlet. With the pump's suction, the ammonia water mixes with the circulating liquid more quickly and evenly, achieving a faster absorption of SO2 gas. The pH monitor at the circulating liquid outlet position enables effective monitoring and obtains a more accurate pH value of the circulating liquid.

Description

Technical Field

[0001] This utility model relates to the field of sulfuric acid production process, and in particular to a tail suction tower with a risk spillover control device. Background Technology

[0002] Tail gas scrubbing towers (tail gas absorption towers) are devices used for industrial waste gas treatment, primarily for recovering harmful gases or raw materials from waste gas. In the sulfuric acid production process, tail gas scrubbing towers are mainly used to absorb SO2 gas. Currently, in the industry, ammonia is added to the tail gas scrubbing tower through a DN50 pipe that enters the tower, runs along the tower wall to the bottom, and a ring-shaped pipe is installed at the bottom with DN5mm holes. Ammonia enters the tower through the holes in the ring-shaped pipe and mixes with the tail gas scrubbing circulating liquid. Because the density of 10% ammonia is 0.925 g / ml, much lower than the density of the circulating liquid, it easily separates within the tail gas scrubbing tower. Mixing is achieved through circulation pumps. The inlet height of the tail gas scrubbing circulation pump is 500mm, and the ammonia inlet is at the bottom of the tower, resulting in a 2-3 minute delay in achieving uniform mixing of the circulating liquid within the tower. Furthermore, there is no pH monitor inside the tail gas scrubbing tower, and the pH value measured by the pH monitor at the circulation pump outlet is not synchronized with the value inside the tower, resulting in a 2-3 minute lag. During system start-up, untimely ammonia adjustments can occur, leading to unabsorbed SO2 gas being discharged from the chimney and causing environmental accidents. Utility Model Content

[0003] The purpose of this invention is to provide a tail-end suction tower with a risk spillover control device to solve the problems existing in the prior art. By adjusting the inlet position of ammonia water to above the circulating liquid outlet, the ammonia water can be mixed with the circulating liquid more quickly and evenly with the pump, achieving a more rapid absorption of SO2 gas. The location of the circulating liquid outlet results in strong turbulence and significant uniformity. A pH monitor is installed at the circulating liquid outlet to achieve effective monitoring and obtain a relatively accurate pH value of the circulating liquid, providing a reliable basis for judging the absorption effect.

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

[0005] This utility model provides a tail-end suction tower with a risk spillover control device, including a tail-end suction tower body, a circulating pump, and a risk spillover control device. The inlet end of the circulating pump is connected to a circulating liquid outlet provided on the outer wall of the tail-end suction tower body, and the outlet end of the circulating pump is connected to a circulating liquid inlet provided on the outer wall of the tail-end suction tower body. The circulating liquid outlet is lower than the circulating liquid inlet in the vertical direction. The risk spillover control device includes an ammonia water pipe, the outlet end of which is connected to an ammonia water inlet provided on the outer wall of the tail-end suction tower body. The ammonia water inlet is higher than the circulating liquid outlet in the vertical direction. A first manual valve and a first pneumatic valve are sequentially arranged on the ammonia water pipe, with the first manual valve close to the ammonia water inlet. The risk spillover control device also includes a pH monitor, which is located inside the tail-end suction tower body and close to the circulating liquid outlet.

[0006] In one embodiment, the risk spillover control device further includes an ammonia water distribution pipe, the inlet end of which is connected to a water distribution outlet disposed on the ammonia water pipe, and the outlet end of which is connected to a water distribution inlet, which is disposed on a pipe between the inlet end of the circulating pump and the outlet of the circulating liquid.

[0007] In one embodiment, a second manual valve is provided on the ammonia water separation pipe.

[0008] In one embodiment, a parallel valve group is also provided on the ammonia water distribution pipe. The parallel valve group includes at least valve bodies connected in parallel. The second manual valve is located near the water distribution inlet, and the parallel valve group is located near the water distribution outlet.

[0009] In one embodiment, the parallel valve group includes a second pneumatic valve and a third manual valve. The second pneumatic valve is installed on the ammonia separation pipe, and the third manual valve is installed on a branch pipe. The inlet and outlet of the branch pipe are connected to the ammonia separation pipe.

[0010] In one embodiment, the water outlet is located between the first manual valve and the first pneumatic valve.

[0011] In one embodiment, the circulating liquid outlet is located 2.5 meters from the bottom of the tail suction tower body, and the pH monitor is located 2.3 meters from the bottom of the tail suction tower body.

[0012] In one embodiment, the ammonia inlet is located 2.5 to 2.8 meters from the bottom of the tail absorption tower body.

[0013] In one embodiment, the ammonia inlet is located vertically between the circulating liquid outlet and the circulating liquid inlet.

[0014] In one embodiment, a controller is also included for controlling the tail suction tower body, the circulating pump, and the risk spillover control device.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] This invention provides a tail-end suction tower with a risk spillover control device. The ammonia inlet position is adjusted to be above the circulating liquid outlet. With the suction of the circulating pump, the ammonia mixes with the circulating liquid more quickly and evenly, achieving a more rapid absorption of SO2 gas. The circulating liquid outlet position exhibits strong turbulence and significant uniformity. A pH monitor is installed at the circulating liquid outlet position for effective monitoring and to obtain a relatively accurate pH value of the circulating liquid, providing a reliable basis for judging the absorption effect. Both the first manual valve and the first pneumatic valve can regulate the flow rate. The first pneumatic valve can perform automatic regulation, while the first manual valve allows for fine manual adjustment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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.

[0018] Figure 1 This is a schematic diagram of an overall structure in an embodiment of the present utility model.

[0019] The components include: 1. Tail suction tower body; 2. Circulation pump; 3. Ammonia water pipe; 4. First manual valve; 5. First pneumatic valve; 6. pH monitor; 7. Ammonia water distribution pipe; 8. Second manual valve; 9. Second pneumatic valve; 10. Third manual valve; and 11. Branch pipe. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the implementation of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed herein. In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are merely for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Therefore, features specified with "first," "second," etc., may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0022] It should also be noted that in the embodiments of this application, the same reference numerals are used to denote the same component or the same part.

[0023] The purpose of this invention is to provide a tail-end suction tower with a risk spillover control device to solve the problems existing in the prior art. By adjusting the inlet position of ammonia water to above the circulating liquid outlet, the ammonia water can be mixed with the circulating liquid more quickly and evenly with the circulating pump, achieving a more rapid absorption of SO2 gas. The location of the circulating liquid outlet results in strong turbulence and significant uniformity. A pH monitor is installed at the circulating liquid outlet to achieve effective monitoring and obtain a relatively accurate pH value of the circulating liquid, providing a reliable basis for judging the absorption effect.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1As shown, this utility model provides a tail-end suction tower with a risk spillover control device, including a tail-end suction tower body 1, a circulating pump 2, and a risk spillover control device. The inlet end of the circulating pump 2 is connected to a circulating liquid outlet located on the outer wall of the tail-end suction tower body 1, and the outlet end of the circulating pump 2 is connected to a circulating liquid inlet located on the outer wall of the tail-end suction tower body 1. The circulating liquid outlet is lower than the circulating liquid inlet in the vertical direction. The risk spillover control device includes an ammonia water pipe 3, the outlet end of which is connected to an ammonia water inlet located on the outer wall of the tail-end suction tower body 1. The ammonia water inlet is higher than the circulating liquid outlet in the vertical direction. A first manual valve 4 and a first pneumatic valve 5 are sequentially installed on the ammonia water pipe 3, with the first manual valve 4 close to the ammonia water inlet. The risk spillover control device also includes a pH monitor 6, which is located inside the tail-end suction tower body 1 and close to the circulating liquid outlet.

[0026] Working principle:

[0027] The circulating liquid outlet is connected to the inlet of circulating pump 2. The suction effect at the circulating liquid outlet is strong, with obvious turbulence and good stirring effect. The ammonia water inlet is located above the circulating liquid outlet. The ammonia water entering the tail suction tower body 1 is drawn towards the circulating liquid outlet and enters the turbulent flow before leaving the tail suction tower body 1 for stirring, effectively increasing the average concentration of ammonia water in the circulating liquid, so that the flowing circulating liquid always has a good effect on absorbing SO2 gas. The pH monitor 6 is located inside the tail suction tower body 1 and close to the circulating liquid outlet, which can effectively detect and obtain a relatively accurate pH value of the circulating liquid, providing a reliable basis for judging the absorption effect. Both the first manual valve 4 and the first pneumatic valve 5 regulate flow rate. The first pneumatic valve 5 provides automatic adjustment, while the first manual valve 4 allows for fine manual adjustment. Both valves operate based on the pH readings from the pH monitor 6. When the pH reading is below the standard value (meaning insufficient SO2 gas has been absorbed), the circulation pump 2 stops, and the flow rate of the first pneumatic valve 5 increases until the pH reading reaches the standard, at which point the circulation pump 2 restarts. Conversely, when the pH reading is above the standard value (meaning excessive ammonia), the flow rate of the first pneumatic valve 5 decreases until the pH reading reaches the standard. To obtain a mixture with a specific pH value, the first manual valve 4 can be manually adjusted to fine-tune the ammonia flow rate.

[0028] In one implementation, the standard pH value is 5.5 to 7.0.

[0029] In one embodiment, the risk spillover control device further includes an ammonia water distribution pipe 7. The inlet end of the ammonia water distribution pipe 7 is connected to the water distribution outlet provided on the ammonia water pipe 3, and the outlet end of the ammonia water distribution pipe 7 is connected to the water distribution inlet. The water distribution inlet is located on the pipe between the inlet end of the circulating pump 2 and the outlet of the circulating liquid. The ammonia water distribution pipe 7 can directly add ammonia water to the circulating liquid leaving the tail suction tower body 1. The circulating liquid leaving the tail suction tower body 1 cannot absorb SO2 gas, and the process of entering and exiting the circulating pump 2 is also a stirring process. Therefore, directly adding ammonia water can quickly increase the pH value of the circulating liquid. When the circulating liquid returns to the tail suction tower body 1, it can also enhance the absorption of SO2 gas. Compared with simply adding ammonia water directly to the tail suction tower body 1, the ammonia water distribution pipe 7 and the ammonia water pipe 3 work together, resulting in faster adjustment and better effect.

[0030] In one embodiment, a second manual valve 8 is provided on the ammonia separation pipe 7. The function of the second manual valve 8 is to control the opening and closing of the ammonia separation pipe 7.

[0031] In one embodiment, a parallel valve group is also provided on the ammonia water distribution pipe 7. The parallel valve group includes at least a number of valve bodies connected in parallel. The second manual valve 8 is located near the water distribution inlet, and the parallel valve group is located near the water distribution outlet. The parallel valve group includes automatic flow regulation and precise flow regulation functions. The regulation logic of the parallel valve group is the same as that of the first manual valve 4 and the first pneumatic valve 5, and it operates based on the detection results of the pH monitor 6.

[0032] In one embodiment, the parallel valve group includes a second pneumatic valve 9 and a third manual valve 10. The second pneumatic valve 9 is installed on the ammonia separation pipe 7, and the third manual valve 10 is installed on a branch pipe 11, with the inlet and outlet ends of the branch pipe 11 connected to the ammonia separation pipe 7. The second pneumatic valve 9 is used for automatic flow regulation, and the third manual valve 10 is used for precise flow regulation.

[0033] In one embodiment, the water distribution outlet is located between the first manual valve 4 and the first pneumatic valve 5. By adjusting the first manual valve 4 and the first pneumatic valve 5, the flow rate at the ammonia inlet and the flow rate in the ammonia distribution pipe 7 are controlled, achieving an accurate water distribution effect.

[0034] In one embodiment, the circulating liquid outlet is located 2.5 meters from the bottom of the tail suction tower body 1, and the pH monitor 6 is located 2.3 meters from the bottom of the tail suction tower body 1.

[0035] In one embodiment, the ammonia inlet is located 2.5 to 2.8 meters from the bottom of the tail absorption tower body 1.

[0036] In one embodiment, the ammonia inlet is located vertically between the circulating liquid outlet and the circulating liquid inlet.

[0037] In one embodiment, the present invention also includes a controller for controlling the tail suction tower body 1, the circulating pump 2, and the risk spillover control device.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then, unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured using a casting process) (except where it is obviously impossible to use an integral forming process).

[0040] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0041] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0042] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0043] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A tail suction tower with a risk spillover control device, characterized in that: The system includes a tail suction tower body (1), a circulating pump (2), and a risk spillover control device. The inlet of the circulating pump (2) is connected to the circulating liquid outlet on the outer wall of the tail suction tower body (1), and the outlet of the circulating pump (2) is connected to the circulating liquid inlet on the outer wall of the tail suction tower body (1). The circulating liquid outlet is lower than the circulating liquid inlet in the vertical direction. The risk spillover control device includes an ammonia pipe (3), the outlet end of the ammonia pipe (3) is connected to the ammonia inlet on the outer wall of the tail suction tower body (1), the ammonia inlet is higher than the circulating liquid outlet in the vertical direction, and a first manual valve (4) and a first pneumatic valve (5) are sequentially arranged on the ammonia pipe (3), the first manual valve (4) is close to the ammonia inlet; The risk spillover control device also includes a pH monitor (6), which is located inside the tail suction tower body (1) and close to the circulating liquid outlet.

2. The tail suction tower with risk spillover control device according to claim 1, characterized in that: The risk spillover control device also includes an ammonia water pipe (7), the inlet end of which is connected to the water outlet provided on the ammonia water pipe (3), and the outlet end of which is connected to the water inlet. The water inlet is provided on the pipe between the inlet end of the circulating pump (2) and the outlet of the circulating liquid.

3. The tail suction tower with risk spillover control device according to claim 2, characterized in that: A second manual valve (8) is installed on the ammonia water pipe (7).

4. The tail suction tower with risk spillover control device according to claim 3, characterized in that: The ammonia water distribution pipe (7) is also equipped with a parallel valve group, which includes at least a valve body connected in parallel. The second manual valve (8) is close to the water distribution inlet, and the parallel valve group is close to the water distribution outlet.

5. The tail suction tower with risk spillover control device according to claim 4, characterized in that: The parallel valve group includes a second pneumatic valve (9) and a third manual valve (10). The second pneumatic valve (9) is installed on the ammonia separation pipe (7), and the third manual valve (10) is installed on the branch pipe (11). The inlet and outlet of the branch pipe (11) are connected to the ammonia separation pipe (7).

6. The tail suction tower with risk spillover control device according to claim 2, characterized in that: The water outlet is located between the first manual valve (4) and the first pneumatic valve (5).

7. The tail suction tower with risk spillover control device according to claim 1, characterized in that: The circulating liquid outlet is located 2.5 meters from the bottom of the tail suction tower body (1), and the pH monitor (6) is located 2.3 meters from the bottom of the tail suction tower body (1).

8. The tail suction tower with risk spillover control device according to claim 7, characterized in that: The ammonia water inlet is located at a distance of 2.5 meters to 2.8 meters from the bottom of the tail suction tower body (1).

9. The tail suction tower with risk spillover control device according to claim 8, characterized in that: The ammonia inlet is located vertically between the circulating liquid inlet and the circulating liquid outlet.

10. The tail suction tower with risk spillover control device according to any one of claims 1 to 9, characterized in that: It also includes a controller for controlling the tail suction tower body (1), the circulating pump (2) and the risk spillover control device.

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