Conveniently operated negative pressure tower

Abstract

The utility model discloses a convenient operation negative pressure tower, including the container, the circumference of one side of container is provided with the air inlet, the top of container is provided with the gas outlet, one side of container is provided with first circulating pump, second circulating pump, third circulating pump, the input of first circulating pump, second circulating pump, third circulating pump is connected with the solution storehouse inside container through three root extraction pipeline respectively and the output is connected with the container inside through first return liquid pipe, second return liquid pipe, third return liquid pipe and intercommunication respectively, the end of first return liquid pipe is connected with first spraying mechanism, the end of second return liquid pipe is connected with second spraying mechanism, the end of third return liquid pipe is connected with third spraying mechanism, be provided with demister between second spraying mechanism, third spraying mechanism, the utility model discloses realized the on -line monitoring absorption solution to determine sulfur trioxide concentration, solution use state on -line switching, improve the function of work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of negative pressure tower technology, specifically a convenient negative pressure tower. Background Technology

[0002] In chemical production and processing, especially in sulfur trioxide treatment processes, negative pressure towers mostly refer to absorption towers, or sulfur trioxide absorption towers, used for desulfurization to purify flue gas. They are also used in the industrial production of sulfuric acid. The principle is to absorb sulfur trioxide in flue gas and tail gas with concentrated sulfuric acid. The concentrated sulfuric acid captures the sulfur trioxide in the flue gas to form pyrosulfuric acid or fuming sulfuric acid. The solution that has absorbed sulfur trioxide is then diluted to obtain sulfuric acid.

[0003] Traditional negative pressure towers are generally only responsible for circulating concentrated sulfuric acid and absorbing sulfur trioxide. The concentration and sulfur content of the absorbed solution need to be manually discharged through valves for laboratory testing. The monitoring results determine whether to continue circulation or discharge the solution for further dilution. This process is time-consuming and cumbersome, affecting production efficiency.

[0004] Therefore, the inventors aimed to solve the problem of designing a negative pressure tower that can monitor the absorption solution online to determine the concentration of sulfur trioxide, switch the solution usage status online, and improve working efficiency. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a convenient negative pressure tower that enables online monitoring of the absorption solution to determine the sulfur trioxide concentration, online switching of the solution's usage status, and improved work efficiency.

[0006] The technical solution adopted by this utility model device is as follows: a convenient-to-operate negative pressure tower, including a container, an air inlet provided on one side of the circumference of the container, an air outlet provided on the top of the container, a first circulation pump, a second circulation pump, and a third circulation pump provided on one side of the container, the input ends of the first circulation pump, the second circulation pump, and the third circulation pump are respectively connected to the solution chamber inside the container through three extraction pipes, and the output ends are respectively connected to the inside of the container through a first return pipe, a second return pipe, and a third return pipe, respectively. A first spray mechanism is connected to the end of the first return pipe, a second spray mechanism is connected to the end of the second return pipe, and a third spray mechanism is connected to the end of the third return pipe. A demister is provided between the second spray mechanism and the third spray mechanism. The first spray mechanism, the second spray mechanism, and the third spray mechanism are all located on the air inlet. The container has a first concave plate at the bottom of the solution chamber, with a through hole in the middle and a connecting valve connected thereto. Below the first concave plate is a second concave plate, with a through hole in the middle and a drain connection pipe connected thereto. The end of the drain connection pipe is connected to a drain pipe, which is located on the side wall of the container. The end of the drain pipe is connected to a transition pump, and the output of the transition pump is connected to a dilution device via a pipeline. An electrical control box is located on the outer wall of the dilution device, and the input of the dilution device is connected to a solenoid valve and an electronic flow meter via a pipeline. A drain chamber is formed between the first and second concave plates inside the container. Online density meters are installed on the side walls of both the solution chamber and the drain chamber. A mounting base is located on the side of the online density meter, and an observation window is located on the inner side of the mounting base.

[0007] Furthermore, the input end of the solenoid valve is connected to a water source via a pipeline, and the output end of the dilution device is connected to a storage container.

[0008] Furthermore, the lower end faces of the first and second concave plates are each provided with circumferentially distributed reinforcing ribs between them and the side wall of the container.

[0009] Furthermore, the cross-sections of the first concave plate and the second concave plate are both inverted conical cylindrical structures with the tips pointing downwards.

[0010] Furthermore, an online infrared spectrometer is bolted onto the mounting base.

[0011] Furthermore, a controller is installed inside the electrical control box, and the controller is electrically connected to a touch screen. The first circulating pump, the second circulating pump, the third circulating pump, the transition pump, the connecting valve, the solenoid valve, the electronic flow meter, and the online density meter are all electrically connected to the controller.

[0012] Furthermore, a homogenizing motor is provided on the side of the dilution device, and the output end of the homogenizing motor is located inside the dilution device and connected to homogenizing blades.

[0013] The beneficial effects of this utility model device are: 1. This utility model uses a preset density meter to continuously detect the density of the solution in the container, thereby determining the concentration of sulfur trioxide in the solution in real time. Based on the standard value of the production process, it determines the destination of the solution containing sulfur trioxide. In conjunction with an online dilution device, it automatically dilutes the discharged solution into sulfuric acid according to the ratio, realizing the functions of online monitoring of the absorption solution to determine the concentration of sulfur trioxide, online switching of solution usage status, and improving work efficiency. Attached Figure Description

[0014] Fig. 1 This is a structural view of the present invention.

[0015] Fig. 2 This is a structural view of the first concave plate of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1-Container; 2-Air inlet; 3-Air outlet; 4-Spare port; 5-Agitator; 6-First circulation pump; 7-Second circulation pump; 8-Third circulation pump; 9-First return pipe; 10-Second return pipe; 11-Third return pipe; 12-Drain pipe; 13-Transfer pump; 14-Dilution device; 15-Electrical control box; 16-Solenoid valve; 17-Electronic flow meter; 18-Online density meter; 19-Mounting base; 20-Observation window; 21-Extraction pipeline; 22-First concave plate; 23-Reinforcing rib; 24-Connecting valve; 25-Second concave plate; 26-Drain connecting pipe. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0018] Example 1: See Figs. 1-2This is a structural view of the present invention and a structural view of the first concave plate 22. A convenient-to-operate negative pressure tower includes a container 1. An air inlet 2 is provided on one side of the circumferential surface of the container 1, and an air outlet 3 is provided on the top of the container 1. A first circulation pump 6, a second circulation pump 7, and a third circulation pump 8 are provided on one side of the container 1. The input ends of the first circulation pump 6, the second circulation pump 7, and the third circulation pump 8 are respectively connected to the solution chamber inside the container 1 through three extraction pipes 21, and their output ends are respectively connected to the inside of the container 1 through a first return pipe 9, a second return pipe 10, and a third return pipe 11. The end of the first return pipe 9 is connected to a first spray nozzle. The structure includes a second spray mechanism connected to the end of the second return pipe 10, a third spray mechanism connected to the end of the third return pipe 11, a demister between the second and third spray mechanisms, and the first, second, and third spray mechanisms all located above the air inlet 2. A stirrer 5 is installed on the side wall of the solution chamber to accelerate mixing and homogenization. The above is the standard structure of a typical sulfur trioxide negative pressure absorption tower. The concentrated sulfuric acid that has absorbed sulfur trioxide is extracted by a circulating pump and circulated for spraying, repeatedly absorbing sulfur trioxide to increase the absorption rate and prevent sulfur trioxide from escaping.

[0019] The solution chamber inside container 1 has a first concave plate 22 at the bottom, with a through hole in the middle and a connecting valve 24 connected thereto. Below the first concave plate 22 is a second concave plate 25, with a through hole in the middle and a drain pipe 26 connected thereto. Both the lower ends of the first and second concave plates 22 and the side wall of container 1 are provided with evenly distributed reinforcing ribs 23. The cross-sections of the first and second concave plates 22 and 25 are inverted conical structures with the pointed ends facing downwards. The function of the solution chamber is to hold a concentrated sulfuric acid solution that has absorbed sulfur trioxide. A drainage chamber is formed between the first concave plate 22 and the second concave plate 25 on the inner side of container 1. An online density meter 18 is installed on the side wall of both the solution chamber and the drainage chamber. The solution in the solution chamber is monitored in real time by the online density meter 18. When the sulfur trioxide concentration in the solution chamber reaches the standard, the connecting valve 24 is opened, and a part of the solution is discharged into the drainage chamber through the connecting valve 24. When the drainage chamber is filled with a solution that can pass through within a specified time, i.e., a specified volume of solution, the connecting valve 24 is closed. The remaining solution in the solution chamber continues to circulate and absorb sulfur trioxide. The missing solution can be added through the spare port 4 set on container 1.

[0020] The end of the drain connection pipe 26 is connected to the drain pipe 12, which is located on the side wall of the container 1. The end of the drain pipe 12 is connected to the transition pump 13. The output end of the transition pump 13 is connected to the dilution device 14 through a pipeline. An electrical control box 15 is located on the outer wall of the dilution device 14. The input end of the dilution device 14 is connected to the solenoid valve 16 and the electronic flow meter 17 through a pipeline. The discharged solution is drawn into the dilution device 14 by the transition pump 13. The input end of the solenoid valve 16 is connected to a water source through a pipeline. Sulfuric acid is produced inside the dilution device 14 by adding pure water in a predetermined ratio. The volume of solution entering the drain chamber from the solution chamber is calculated by calculating the opening time of the connection valve 24 and the specified flow rate of the connection valve 24, thereby mixing the pure water passing through the solenoid valve 16 and the electronic flow meter 17. The output end of the dilution device 14 is connected to the storage container 1 for storing the diluted sulfuric acid solution.

[0021] The online detection of sulfur trioxide concentration can be achieved not only by using the online densitometer 18, but also by other methods. To increase the options for concentration detection, the online densitometer 18 is provided with a mounting base 19 on its side, and an observation window 20 is provided on the inner side of the mounting base 19. An online infrared spectrometer can be mounted on the mounting base 19 by bolts.

[0022] The controller is installed inside the electrical control box 15. The controller is electrically connected to a touch screen. The first circulation pump 6, the second circulation pump 7, the third circulation pump 8, the transition pump 13, the connecting valve 24, the solenoid valve 16, the electronic flow meter 17, and the online density meter 18 are all electrically connected to the controller.

[0023] The dilution device 14 is a commonly used device in the prior art. Its working principle is to dilute sulfuric acid by controlling the amount of pure water input according to the volume and concentration of the introduced solution. A homogenizing motor is installed on the side of the dilution device 14. The output end of the homogenizing motor is located inside the dilution device 14 and is connected to homogenizing blades. The speed of dilution and homogenization can be accelerated by stirring.

[0024] This invention employs a pre-set density meter to continuously detect the density of the solution in container 1, thereby determining the concentration of sulfur trioxide in the solution in real time. Based on the standard value of the production process, it determines the destination of the solution containing sulfur trioxide. In conjunction with the online dilution device 14, it automatically dilutes the discharged solution into sulfuric acid according to the ratio, realizing the functions of online monitoring of the absorption solution to determine the concentration of sulfur trioxide, online switching of solution usage status, and improving work efficiency.

Claims

1. A convenient-to-operate negative pressure tower, comprising a container (1), wherein an air inlet (2) is provided on one side circumferential surface of the container (1), and an air outlet (3) is provided on the top of the container (1). A first circulation pump (6), a second circulation pump (7), and a third circulation pump (8) are provided on one side of the container (1). The input ends of the first circulation pump (6), the second circulation pump (7), and the third circulation pump (8) are respectively connected to the solution chamber inside the container (1) through three extraction pipes (21), and the output ends are respectively connected to the solution chamber inside the container (1) through the first circulation pump (6), the second circulation pump (7), and the third circulation pump (8). A return pipe (9), a second return pipe (10), and a third return pipe (11) are connected to the inside of the container (1). The end of the first return pipe (9) is connected to a first spray mechanism, the end of the second return pipe (10) is connected to a second spray mechanism, and the end of the third return pipe (11) is connected to a third spray mechanism. A demister is provided between the second and third spray mechanisms. The first, second, and third spray mechanisms are all located above the air inlet (2). The feature is that: The solution chamber inside the container (1) has a first concave plate (22) at the bottom. A through hole is provided in the middle of the first concave plate (22), and a connecting valve (24) is connected to the through hole. A second concave plate (25) is provided below the first concave plate (22). A through hole is provided in the middle of the second concave plate (25), and a drain connecting pipe (26) is connected to the through hole. A drain pipe (12) is connected to the end of the drain connecting pipe (26). The drain pipe (12) is located on the side wall of the container (1). A transition pump (13) is connected to the end of the drain pipe (12). The output end of the container (1) is connected to a dilution device (14) via a pipeline. An electrical control box (15) is provided on the outer wall of the dilution device (14). The input end of the dilution device (14) is connected to a solenoid valve (16) and an electronic flow meter (17) via a pipeline. A drainage chamber is formed between the first concave plate (22) and the second concave plate (25) on the inner side of the container (1). An online density meter (18) is provided on the side wall of both the solution chamber and the drainage chamber. An installation base (19) is provided on the side of the online density meter (18). An observation window (20) is provided on the inner side of the installation base (19).

2. The convenient-operation negative pressure tower according to claim 1, characterized in that: The input end of the solenoid valve (16) is connected to a water source through a pipeline, and the output end of the dilution device (14) is connected to a storage container (1).

3. The convenient-operation negative pressure tower according to claim 1, characterized in that: The lower end faces of the first concave plate (22) and the second concave plate (25) are provided with circumferentially distributed reinforcing ribs (23) between them and the side wall of the container (1).

4. The convenient-operation negative pressure tower according to claim 3, characterized in that: The cross-sections of the first concave plate (22) and the second concave plate (25) are both inverted conical cylinder structures with the tips pointing downwards.

5. The convenient-operation negative pressure tower according to claim 1, characterized in that: An online infrared spectrometer is mounted on the mounting base (19) by bolts.

6. The convenient-operation negative pressure tower according to claim 1, characterized in that: The electrical control box (15) is equipped with a controller inside. The controller is electrically connected to a touch screen. The first circulating pump (6), the second circulating pump (7), the third circulating pump (8), the transition pump (13), the connecting valve (24), the solenoid valve (16), the electronic flow meter (17), and the online density meter (18) are all electrically connected to the controller.

7. The convenient-operation negative pressure tower according to claim 1, characterized in that: The dilution device (14) is provided with a homogenizing motor on its side, and the output end of the homogenizing motor is located inside the dilution device (14) and connected to a homogenizing blade.

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