A concentrated sulfuric acid pollution treatment device for sulfuric acid production

Abstract

The application discloses a concentrated sulfuric acid pollution treatment device for sulfuric acid production and relates to the field of concentrated sulfuric acid filtration. The device comprises a pressurizing shell, a support frame is fixedly installed at the inner upper end of the pressurizing shell, an output pipe is fixedly installed at the upper end of the support frame, a filter part for filtering concentrated sulfuric acid is installed in the output pipe, a pressure limiting piston is slidingly clamped at the inner lower end of the pressurizing shell, a plurality of uniformly distributed Venturi ejectors are fixedly installed at the outer ring of the pressurizing shell, a pressure relief pipe is fixedly installed at the input end of the Venturi ejector, and the end, away from the Venturi ejector, of the pressure relief pipe is in communication with the interior of the pressurizing shell. The device can utilize the generated gas to periodically release pressure, spontaneously filter the concentrated sulfuric acid droplets contained in the tail gas, and pretreat the unfilterable sulfur trioxide and sulfur dioxide gas before filtering.

Description

Technical Field

[0001] This invention relates to the field of concentrated sulfuric acid filtration, specifically to a concentrated sulfuric acid pollution treatment device for sulfuric acid production. Background Technology

[0002] Sulfuric acid is a pillar chemical raw material of the national economy, widely used in core fields such as fertilizer production, non-ferrous metal smelting, petrochemicals, and fine chemicals. Its output is often considered an important indicator of a country's industrial development level. Currently, the contact process is commonly used in industrial sulfuric acid production. In the SO3 absorption process, due to limitations in gas-liquid mass transfer efficiency, uneven temperature distribution within the tower, and airflow turbulence, the exhaust gas at the absorption tower outlet inevitably carries a large amount of concentrated liquid sulfuric acid droplets with a particle size of 0.1-10 μm, as well as incompletely absorbed gaseous SO3 and trace amounts of unconverted SO2. Direct emission of these pollutants would not only cause severe air pollution, equipment corrosion, and ecological damage, but also lead to a significant loss of sulfuric acid resources and fail to meet the requirement of sulfuric acid mist emission concentration ≤5 mg / m³. 3 Mandatory requirements.

[0003] Existing sulfuric acid tail gas treatment units generally suffer from severe power dependence. The vast majority require external power supplies, compressed air, or independent automated control systems for operation. This not only results in high energy consumption and high daily maintenance costs, but also poses significant electrical safety hazards in the high-explosion-risk areas of sulfuric acid production. All electrical equipment must adopt expensive explosion-proof designs and undergo regular explosion-proof testing, further increasing production investment. Furthermore, current technologies typically separate the pretreatment of gaseous pollutants and the filtration of liquid acid mist into two independent systems. Physical filtration units can only intercept liquid concentrated sulfuric acid droplets and cannot treat gaseous SO3 and SO2. Separate conversion towers or alkaline scrubbing towers must be installed to treat gaseous pollutants separately, leading to a lengthy overall process flow, large equipment footprint, and significantly increased investment costs. Moreover, the complex integration between different systems can easily cause operational synchronization problems.

[0004] This fragmented process design also prevents the effective recycling of resources. The large amounts of saline wastewater and residue generated by the alkali washing tower are difficult to treat, causing secondary pollution. Furthermore, the sulfur resources in gaseous SO3 and SO2 cannot be recovered and converted into sulfuric acid products. In summary, existing technologies cannot achieve fully automated operation and integrated synergistic treatment of gaseous and liquid pollutants, making it difficult to simultaneously meet the multiple demands of energy conservation, clean production, and resource recycling. This severely restricts the green, low-carbon, and high-quality development of the sulfuric acid industry. Summary of the Invention

[0005] The purpose of this invention is to provide a concentrated sulfuric acid pollution treatment device for sulfuric acid production based on the dynamic characteristics of foam grayness, so as to solve the problems mentioned in the background art.

[0006] A concentrated sulfuric acid pollution treatment device for sulfuric acid production includes a pressurizing shell. A support frame is fixedly installed at the upper end of the pressurizing shell, and an output pipe is fixedly installed at the upper end of the support frame. A filter element for filtering concentrated sulfuric acid is installed inside the output pipe. A pressure limiting piston is slidably engaged at the lower end of the pressurizing shell. Multiple evenly distributed Venturi injectors are fixedly installed on the outer ring of the pressurizing shell. A pressure relief pipe is fixedly installed at the input end of each Venturi injector. The end of the pressure relief pipe away from the Venturi injector is connected to the interior of the pressurizing shell. The pressure relief pipe is located above the pressure limiting piston. Multiple evenly distributed pressure limiting components are fixedly installed below the pressure limiting piston.

[0007] Furthermore, the pressure limiting component includes a fixed housing and a sliding housing. The fixed housing is fixedly installed outside the pressure boosting housing, and the sliding housing is fixedly installed on the lower surface of the pressure limiting piston. The sliding housing slides against the inner wall of the pressure boosting housing. A stabilizing frame is fixedly connected between multiple sliding housings. A second pressure limiting block is fixedly installed inside the sliding housing. A movable plate is slidably installed on the side of the fixed housing near the sliding housing. A first pressure limiting block that cooperates with the second pressure limiting block is fixedly installed on the side of the movable plate near the sliding housing. A first return spring is fixedly connected between the pressure limiting piston and the pressure boosting housing.

[0008] Furthermore, a reset block is fixedly installed above the first pressure limiting block, a roller is rotatably installed on the lower surface of the second pressure limiting block, a pressure boosting plate is slidably installed inside the fixed housing, a plurality of evenly distributed stabilizing rods are fixedly installed inside the fixed housing, the moving plate and the pressure boosting plate are both slidably sleeved on the outside of the stabilizing rods, a plurality of evenly distributed pressure boosting springs are fixedly connected between the moving plate and the pressure boosting plate, a rotating screw is rotatably installed on the fixed housing, and the pressure boosting plate is sleeved on the outside of the rotating screw through a threaded fit.

[0009] Furthermore, the upper outer end of the support frame is fitted with two mutually symmetrical first dispersion shells, and the lower outer end of the support frame is fitted with two mutually symmetrical second dispersion shells. The two first dispersion shells are detachably installed together, and the two second dispersion shells are also detachably connected together. The lower outer end of the output pipe is fitted with a clamping component through a thread, and multiple evenly distributed levers are fixedly installed on the clamping component.

[0010] Furthermore, both the first and second dispersion shells have an internal structure that is smaller at the top and larger at the bottom. The first dispersion shell is filled with filler 1, and the second dispersion shell is filled with filler 2, which has two-thirds of its internal volume. Both the upper and lower ends of the first and second dispersion shells are provided with multiple dispersion holes.

[0011] Furthermore, the filter component includes a filter plate support, which is slidably installed inside the output pipe. Multiple evenly distributed fine filter plates are detachably installed on the filter plate support, and a stabilizing bracket is fixedly installed below the filter plate support.

[0012] Furthermore, a first connecting rod is slidably mounted on the upper interior of the support frame, and a second connecting rod is slidably mounted on the lower interior of the support frame. A first sliding plate is fixedly mounted on the lower end of the first connecting rod, and a sliding rod is fixedly mounted on the top end of the second connecting rod. A second sliding plate is fixedly mounted on the upper end of the sliding rod. The sliding rod slides through the first sliding plate, and the second sliding plate is located above the filter plate bracket. A buffer spring is fixedly connected between the second sliding plate and the first sliding plate, and a protective plate is fixedly mounted on the lower end of the second connecting rod.

[0013] Furthermore, a bucket-shaped baffle is fixedly installed below the support frame, and an arc-shaped baffle is fixedly installed below the bucket-shaped baffle. A recovery component is fixedly installed on one side of the outer side of the pressurization housing, and the height of the side of the arc-shaped baffle near the recovery component is lower than the height of the side away from the recovery component.

[0014] Furthermore, the recovery component includes a collection hopper, which is connected to the interior of the pressurizing housing. A first collection pipe is fixedly installed at the lower end of the collection hopper, a pressure stabilizing housing is fixedly installed at the lower end of the first collection pipe, and a second collection pipe is fixedly installed at the lower end of the pressure stabilizing housing. The second collection pipe is connected to an external concentrated sulfuric acid delivery device.

[0015] Furthermore, a plurality of evenly distributed balance bars are fixedly installed inside the pressure stabilizing housing, a pressure stabilizing plate is slidably mounted inside the pressure stabilizing housing, the pressure stabilizing plate is slidably sleeved on the outside of the balance bars, a plurality of second return springs are fixedly connected between the pressure stabilizing plate and the pressure stabilizing housing, a plurality of evenly distributed flow ports are opened on the pressure stabilizing plate, and a plurality of plugs corresponding to the flow ports are fixedly installed at the bottom of the inside of the pressure stabilizing housing.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This device, by setting a pressure limiting piston and pressure limiting components, can periodically depressurize the gas generated by the reaction and spontaneously filter the concentrated sulfuric acid droplets contained in the tail gas. Furthermore, it can pre-treat unfilterable sulfur trioxide and sulfur dioxide gases before filtration. 2. This device, by setting a first connecting rod and a filter component, can generate unidirectional vibration when periodically depressurizing, shaking off the liquid droplets on the fine filter plate, preventing too much concentrated sulfuric acid liquid droplets from remaining on the fine filter plate, and preventing gas from passing through and blowing the concentrated sulfuric acid liquid droplets on the fine filter plate back up; 3. This device automatically collects fallen concentrated sulfuric acid by setting up an arc-shaped baffle and a recovery component, and transports it to the outside for storage. When the internal pressure of the pressurization shell is too high, the recovery component will automatically shut down to prevent exhaust gas leakage and high-pressure gas from causing malfunctions in the external concentrated sulfuric acid delivery. 4. This device, by setting up a first dispersion shell and a second dispersion shell, the packing inside the second dispersion shell can not only absorb the impact force of the gas ejected by the Venturi injector, but also make the gas have a higher adhesion area, thereby increasing the conversion of sulfur trioxide and sulfur dioxide and other gases, and further increasing the filtration effect of the fine filter plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the pressurization housing in this invention; Figure 3 This is a schematic diagram of the structure of the first dispersion shell and the second dispersion shell in this invention; Figure 4 This is a schematic diagram of the pressure-limiting piston in this invention; Figure 5 This is a schematic diagram of the pressure-limiting component in this invention; Figure 6 This is a schematic diagram of the structure of the filter component in this invention; Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle; Figure 8 This is a schematic diagram of the structure of the recycling component in this invention; Figure 9 This is a cross-sectional view of the voltage stabilizing housing in this invention.

[0018] In the diagram: 1. Pressurizing shell; 2. Support frame; 3. Output pipe; 4. Pressure limiting piston; 5. Pressure limiting component; 6. Bucket-shaped baffle; 7. Arc-shaped baffle; 8. First dispersion shell; 9. Recovery component; 21. First connecting rod; 22. Second connecting rod; 23. Sliding rod; 31. Filter component; 32. Pressing component; 41. Venturi injector; 42. First return spring; 50. Stabilizing frame; 51. Fixed shell; 52. Sliding shell; 53. Moving plate; 54. First pressure limiting block; 55. Return block; 56. Pressurizing plate; 81. Second dispersion shell; 91. Collection hopper; 92. First collecting pipe; 93. Pressure stabilizing housing; 94. Second collecting pipe; 211. First sliding plate; 212. Buffer spring; 221. Protective plate; 231. Second sliding plate; 311. Filter plate support; 312. Fine filter plate; 313. Stabilizing support; 321. Toggle lever; 411. Pressure relief pipe; 511. Stabilizing rod; 512. Rotating screw; 521. Second pressure limiting block; 522. Roller; 561. Pressure boosting spring; 811. Dispersion hole; 931. Balance bar; 932. Pressure stabilizing plate; 933. Second reset spring; 934. Flow port; 935. Block. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-9 This invention provides a technical solution for a concentrated sulfuric acid pollution treatment device for sulfuric acid production: A concentrated sulfuric acid pollution treatment device for sulfuric acid production includes a pressurizing shell 1. A support frame 2 is fixedly installed at the upper end of the interior of the pressurizing shell 1. An output pipe 3 is fixedly installed at the upper end of the support frame 2. A filter component 31 for filtering concentrated sulfuric acid is installed inside the output pipe 3. A pressure limiting piston 4 is slidably engaged at the lower end of the interior of the pressurizing shell 1. A plurality of evenly distributed Venturi injectors 41 are fixedly installed on the outer ring of the pressurizing shell 1. A pressure relief pipe 411 is fixedly installed at the input end of the Venturi injector 41. The end of the pressure relief pipe 411 away from the Venturi injector 41 is connected to the interior of the pressurizing shell 1. The pressure relief pipe 411 is located above the pressure limiting piston 4. A plurality of evenly distributed pressure limiting components 5 are fixedly installed below the pressure limiting piston 4.

[0021] In actual use, the pressurizing shell 1 is directly installed at the end of the sulfuric acid production pipeline. The tail gas after the production of concentrated sulfuric acid contains free concentrated sulfuric acid droplets and some unreacted SO3 and other acidic gases. The acidic gas is continuously pressurized in the external reaction container until the gas pressure exceeds the pressure limit of the pressure limiting component 5. At this time, the pressure limiting component 5 will release the pressure limiting piston 4. The pressure limiting piston 4 is quickly pushed upward under the action of gas pressure. The pressure limiting piston 4 moves from below the pressure relief pipe 411 to above the pressure relief pipe 411. At this time, the high pressure gas below the pressure limiting piston 4 will quickly enter the Venturi injector 41 along the pressure relief pipe 411. The Venturi injector 41 has an inlet, an outlet and an intake port. When the high pressure gas is driven to flow quickly through the inlet, its kinetic energy is converted into negative pressure potential energy, thereby forming a strong negative pressure at the intake port. Then, it can absorb superheated steam from the outside and spray it out from the outlet together, reacting efficiently with SO3 in the tail gas to generate stable concentrated sulfuric acid particles. Because gaseous SO3 cannot be captured by the filter element 31, it is first converted so that it completes the gas-liquid phase change before entering the filter plate, so that it can generate concentrated sulfuric acid droplets that can be captured. Then, the gas flow containing droplets is efficiently intercepted when it passes through the filter element 31. The kinetic energy generated by the exhaust gas produced by the reaction drives the Venturi injector 41 to spontaneously complete the water vapor replenishment and SO3 conversion. No external power source is required, realizing efficient self-driven purification and significantly reducing energy consumption and operation and maintenance costs.

[0022] The pressure limiting component 5 includes a fixed housing 51 and a sliding housing 52. The fixed housing 51 is fixedly installed on the outside of the pressure boosting housing 1, and the sliding housing 52 is fixedly installed on the lower surface of the pressure limiting piston 4. The sliding housing 52 slides against the inner wall of the pressure boosting housing 1. A stabilizing frame 50 is fixedly connected between multiple sliding housings 52. A second pressure limiting block 521 is fixedly installed inside the sliding housing 52. A movable plate 53 is slidably installed on the side of the fixed housing 51 near the sliding housing 52. A first pressure limiting block 54 that cooperates with the second pressure limiting block 521 is fixedly installed on the side of the movable plate 53 near the sliding housing 52. The pressure limiting piston 4 is fixedly connected to the pressure boosting housing 1. A first reset spring 42 is connected; a reset block 55 is fixedly installed above the first pressure limiting block 54; a roller 522 is rotatably installed on the lower surface of the second pressure limiting block 521; a pressure boosting plate 56 is slidably installed inside the fixed housing 51; multiple evenly distributed stabilizing rods 511 are fixedly installed inside the fixed housing 51; both the moving plate 53 and the pressure boosting plate 56 are slidably sleeved on the outside of the stabilizing rods 511; multiple evenly distributed pressure boosting springs 561 are fixedly connected between the moving plate 53 and the pressure boosting plate 56; a rotating screw 512 is rotatably installed on the fixed housing 51; and the pressure boosting plate 56 is sleeved on the outside of the rotating screw 512 through a threaded fit.

[0023] Please refer to Figure 4 and Figure 5In the initial state, the inclined surface on the second pressure limiting block 521 abuts against the inclined surface on the first pressure limiting block 54 to form a self-locking structure. The angle of the inclined surface is about 30° relative to the horizontal plane, ensuring that the system remains stable and closed under normal conditions. When the exhaust gas pressure continues to rise to exceed the threshold set by the pressure limiting component 5, the pressure limiting piston 4 is driven to rise. The kinetic energy of the rise breaks through the static friction between the first pressure limiting block 54 and the second pressure limiting block 521, and the inclined surfaces slide relative to each other. The first pressure limiting block 54 compresses the pressure boosting spring 561. At this time, the first pressure limiting block 54 and the reset block 55 both enter the interior of the fixed housing 51. At this time, the high pressure gas below the pressure limiting piston 4 is discharged to the top of the pressure limiting piston 4 through the pressure relief pipe 411 and the Venturi injector 41 and finally discharged from the device. After the high-pressure gas is completely discharged, the system pressure drops rapidly. The first return spring 42 pushes the pressure limiting piston 4 to descend. At this time, the pressure limiting piston 4 drives the first return spring 42 and the second pressure limiting block 521 to descend synchronously. The roller 522 can convert the sliding friction between the second pressure limiting block 521 and the inclined surface of the return block 55 into rolling friction. Moreover, the angle of the inclined surface on the return block 55 is greater than the angle of the inclined surface on the first pressure limiting block 54 and the second pressure limiting block 521, thereby greatly reducing the friction. As a result, the first return spring 42 can easily drive the second pressure limiting block 521 and the roller 522 to descend and push the return block 55 to compress the pressure boosting spring 561 for reset. During the reset process, the inclined surfaces of the first pressure limiting block 54 and the second pressure limiting block 521 re-engage, the self-locking structure is instantly restored, and the system returns to the initial steady state. During use, depending on the size of the external container and the intensity of the reaction, the position of the pressure plate 56 can be adjusted by rotating the screw 512, thereby adjusting the preload of the pressure spring 561, so as to precisely control the self-locking threshold and the reset response speed.

[0024] The upper outer end of the support frame 2 is fitted with two symmetrical first dispersion shells 8, and the lower outer end of the support frame 2 is fitted with two symmetrical second dispersion shells 81. The two first dispersion shells 8 are detachably installed, and the two second dispersion shells 81 are also detachably connected. The lower outer end of the output pipe 3 is fitted with a clamping component 32 through a thread. Multiple evenly distributed levers 321 are fixedly installed on the clamping component 32. The interiors of the first dispersion shells 8 and the second dispersion shells 81 are both of a structure that is smaller at the top and larger at the bottom. The interior of the first dispersion shell 8 is filled with filler 1, and the interior of the second dispersion shell 81 is filled with filler 2, which is two-thirds of its internal volume. Multiple dispersion holes 811 are opened at both the upper and lower ends of the first dispersion shells 8 and the second dispersion shells 81.

[0025] Please refer to Figure 2The high-pressure gas below the pressure-limiting piston 4 is rapidly ejected through the Venturi injector 41. Direct filtration of this gas could easily damage the filter element due to the high-speed airflow, leading to structural damage or blockage. Therefore, the high-pressure gas ejected from the Venturi injector 41 first passes through the dispersion hole 811 and then through the second dispersion shell 81. The filler inside the second dispersion shell 81 can be, but is not limited to, PTFE particles, while the filler inside the first dispersion shell 81 can be, but is not limited to, activated carbon particles. When the high-pressure gas passes through the second dispersion shell 81, it can be purged by the PTFE particles in the second dispersion shell 81. FE particles initially buffer and disperse the airflow, reducing impact kinetic energy. The airflow then enters the first dispersion shell 8, where activated carbon particles further adsorb impurities and odors. They also catalytically oxidize incompletely reacted SO2 from the front end, converting it to SO3. This SO3 then combines with water vapor ejected from the Venturi injector 41 to form concentrated sulfuric acid droplets, which are captured by the filter element 31. The second dispersion shell 81 is only two-thirds full so that when high-pressure gas arrives, the partially filled PTFE packing can slightly bounce under the impact of the airflow, avoiding continuous rigid collisions and significantly reducing wear. Simultaneously, the buffer space allows large acid mist particles to pass directly without accumulating on top of the packing layer, reducing acid corrosion of the packing. Furthermore, it further attenuates the impact kinetic energy from the high-pressure airflow, reducing the impact on the subsequent activated carbon and preventing its breakage. Furthermore, PTFE particles and activated carbon can increase the contact area and residence time between gases, significantly improving the reaction efficiency of superheated steam and SO3, and ensuring that SO3 is fully converted into concentrated sulfuric acid droplets; After a period of use, the activated carbon inside the first dispersion shell 8 becomes saturated with adsorption. At this point, the clamping component 32 can be rotated to release its squeezing effect on the first and second dispersion shells 81. Then, the detachable connection between the two first dispersion shells 8 and the two second dispersion shells 81 can be released. The two first dispersion shells 8 and the two second dispersion shells 81 can be detachably connected using screws, but not limited to screws. The lever 321 is for easier rotation of the clamping component 32, thereby quickly replacing the packing and ensuring the continuous and efficient operation of the system. The saturated activated carbon can be sent for processing and pyrolysis to recover the concentrated sulfuric acid, SO2, SO3, etc. adsorbed therein. When replacing, first fix the two first dispersion shells 8 and the two second dispersion shells 81 to the outside of the support frame 2, and then rotate the clamping component 32 to press the first dispersion shells 8 and the second dispersion shells 81 together to achieve a fixed connection. It should be noted that corrosion-resistant sealing strips are used to seal any gaps to ensure that there is no leakage of high-pressure gas. All components that need to be in contact with acidic media for a long time are made of Hastelloy C-276 material.

[0026] The filter component 31 includes a filter plate support 311, which is slidably installed inside the output pipe 3. Multiple evenly distributed fine filter plates 312 are detachably installed on the filter plate support 311. A stabilizing support 313 is fixedly installed below the filter plate support 311. A first connecting rod 21 is slidably engaged at the upper end of the support frame 2, and a second connecting rod 22 is slidably engaged at the lower end of the support frame 2. A first sliding plate 211 is fixedly installed at the lower end of the first connecting rod 21, and a sliding rod 23 is fixedly installed at the top end of the second connecting rod 22. A second sliding plate 231 is fixedly installed at the upper end of the sliding rod 23. The sliding rod 23 slides through the first sliding plate 211. The second sliding plate 231 is located above the filter plate support 311. A buffer spring 212 is fixedly connected between the second sliding plate 231 and the first sliding plate 211. A protective plate 221 is fixedly installed at the lower end of the second connecting rod 22.

[0027] Please refer to Figure 6 and Figure 7 When the pressure-limiting piston 4 is breached by atmospheric pressure, it will rise rapidly. At this time, the pressure-limiting piston 4 will push the protective plate 221 to rise rapidly. The protective plate 221 can prevent the pressure-limiting piston 4 from rising rapidly and causing the second connecting rod 22 to puncture the surface of the pressure-limiting piston 4. The protective plate 221 has a large area, resulting in low pressure and effectively dispersing the impact force. When the second connecting rod 22 rises, it will drive the second sliding plate 231 to rise. The second sliding plate 231 will drive the buffer spring 212 to stretch. The buffer spring 212 will drive the first sliding plate 211 and the first connecting rod 21 to rise. The rise of the first connecting rod 21 will... The stabilizing support 313 is pushed to rise rapidly, which in turn pushes the fine filter plate 312 and the filter plate support 311 to rise rapidly. Because the pressure limiting piston 4 has extremely high impact force and speed during the rising process, a buffer spring 212 is set to reduce the impact of the sliding rod 23. At the same time, the first connecting rod 21 and the stabilizing support 313 can rise rapidly. At this time, the liquid droplets filtered inside the fine filter plate 312 will have static inertia and will detach from the fine filter plate 312. Under the action of gravity, they will fall onto the support frame 2 and the first dispersion shell 8, thereby achieving efficient separation and recovery of the liquid droplets.

[0028] A bucket-shaped baffle 6 is fixedly installed below the support frame 2, and an arc-shaped baffle 7 is fixedly installed below the bucket-shaped baffle 6. A recovery component 9 is fixedly installed on one side of the outer side of the pressurization shell 1. The height of the side of the arc-shaped baffle 7 near the recovery component 9 is lower than the height of the side away from the recovery component 9.

[0029] When the droplets fall onto the support frame 2 and the first dispersion shell 8, they are driven downwards by gravity and eventually drip onto the funnel-shaped baffle 6. Because the surface of the funnel-shaped baffle 6 is inclined, the droplets will slide onto the arc-shaped baffle 7. The arc-shaped baffle 7 is also inclined, so the concentrated sulfuric acid that drips will slowly flow into the recovery component 9 along the inclined surface of the arc-shaped baffle 7 and be collected by the recovery component 9. The use of superheated steam is to prevent SO3 from reacting with liquid water to generate difficult-to-treat acid mist, and to ensure that the excess steam after participating in the reaction will not condense into liquid droplets, thereby avoiding the formation of more corrosive fuming sulfuric acid after mixing with the condensed concentrated sulfuric acid.

[0030] The recovery component 9 includes a collection hopper 91, which is connected to the interior of the pressurizing housing 1. A first collection pipe 92 is fixedly installed at the lower end of the collection hopper 91, and a pressure stabilizing housing 93 is fixedly installed at the lower end of the first collection pipe 92. A second collection pipe 94 is fixedly installed at the lower end of the pressure stabilizing housing 93 and is connected to an external concentrated sulfuric acid conveying device. Multiple evenly distributed balance bars 931 are fixedly installed inside the pressure stabilizing housing 93. A pressure stabilizing plate 932 is slidably fitted inside the pressure stabilizing housing 93 and is slidably sleeved on the outside of the balance bars 931. Multiple second return springs 933 are fixedly connected between the pressure stabilizing plate 932 and the pressure stabilizing housing 93. Multiple evenly distributed flow ports 934 are opened on the pressure stabilizing plate 932. Multiple blocking blocks 935 corresponding to the flow ports 934 are fixedly installed at the bottom of the interior of the pressure stabilizing housing 93.

[0031] Please refer to Figure 9 When no high-pressure gas passes through, the pressure limiting piston 4 is at normal pressure. At this time, the liquefied concentrated sulfuric acid will be collected by the recovery component 9 along the arc-shaped baffle 7 and transported to the outside. Once the high-pressure gas passes through the pressure limiting piston 4 at high speed, some gas and vapor may pass through the recovery component 9 and enter the external concentrated sulfuric acid transport pipeline, which may cause a safety accident. Therefore, under normal conditions, the second reset spring 933 pulls the pressure stabilizing plate 932 to separate from the block 935. At this time, the liquid concentrated sulfuric acid will enter the inner cavity of the pressure stabilizing shell 93 through the collection hopper 91 and the first collection pipe 92, and then enter the interior of the second collection pipe 94 through the flow port 934 under the action of gravity. When the high-pressure gas passes through the pressure limiting piston 4 quickly, the high-speed airflow will pass through the flow port 934 quickly and form a negative pressure below the flow port 934, causing the flow port 934 to drop rapidly, causing the block 935 to lock inside the flow port 934 and block it. If the high-pressure gas continues to be output, the pressure stabilizing plate 932 will be firmly pressed against the block 935 due to the action of the airflow, thereby completely blocking the escape path of the high-pressure gas towards the second collection pipe 94, ensuring that the system remains sealed and safe under transient overpressure conditions. When the gas pressure returns to normal pressure, the second reset spring 933 pulls the pressure stabilizing plate 932 to rise. At this time, the flow port 934 reopens, and the liquid concentrated sulfuric acid resumes normal flow.

[0032] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A concentrated sulfuric acid pollution treatment device for sulfuric acid production, comprising a pressurization shell (1), characterized in that: A support frame (2) is fixedly installed at the upper end of the inside of the pressurizing housing (1). An output pipe (3) is fixedly installed at the upper end of the support frame (2). A filter element (31) for filtering concentrated sulfuric acid is installed inside the output pipe (3). A pressure limiting piston (4) is slidably locked at the lower end of the inside of the pressurizing housing (1). Multiple evenly distributed Venturi injectors (41) are fixedly installed at the outer ring of the pressurizing housing (1). A pressure relief pipe (411) is fixedly installed at the input end of the Venturi injector (41). The end of the pressure relief pipe (411) away from the Venturi injector (41) is connected to the inside of the pressurizing housing (1). The pressure relief pipe (411) is located above the pressure limiting piston (4). Multiple evenly distributed pressure limiting components (5) are fixedly installed below the pressure limiting piston (4).

2. The concentrated sulfuric acid pollution treatment device for sulfuric acid production according to claim 1, characterized in that: The pressure limiting component (5) includes a fixed housing (51) and a sliding housing (52). The fixed housing (51) is fixedly installed on the outside of the pressure boosting housing (1). The sliding housing (52) is fixedly installed on the lower surface of the pressure limiting piston (4). The sliding housing (52) slides against the inner wall of the pressure boosting housing (1). A stabilizing frame (50) is fixedly connected between multiple sliding housings (52). A second pressure limiting block (521) is fixedly installed inside the sliding housing (52). A moving plate (53) is slidably installed on the side of the fixed housing (51) near the sliding housing (52). A first pressure limiting block (54) that cooperates with the second pressure limiting block (521) is fixedly installed on the side of the moving plate (53) near the sliding housing (52). A first return spring (42) is fixedly connected between the pressure limiting piston (4) and the pressure boosting housing (1).

3. The concentrated sulfuric acid pollution treatment device for sulfuric acid production according to claim 2, characterized in that: A reset block (55) is fixedly installed above the first pressure limiting block (54), and a roller (522) is rotatably installed on the lower surface of the second pressure limiting block (521). A pressure boosting plate (56) is slidably installed inside the fixed housing (51). Multiple evenly distributed stabilizing rods (511) are fixedly installed inside the fixed housing (51). The moving plate (53) and the pressure boosting plate (56) are both slidably sleeved on the outside of the stabilizing rods (511). Multiple evenly distributed pressure boosting springs (561) are fixedly connected between the moving plate (53) and the pressure boosting plate (56). A rotating screw (512) is rotatably installed on the fixed housing (51), and the pressure boosting plate (56) is sleeved on the outside of the rotating screw (512) through a threaded fit.

4. A concentrated sulfuric acid pollution treatment device for sulfuric acid production according to claim 3, characterized in that: The upper outer end of the support frame (2) is fitted with two mutually symmetrical first dispersion shells (8), and the lower outer end of the support frame (2) is fitted with two mutually symmetrical second dispersion shells (81). The two first dispersion shells (8) are detachably installed, and the two second dispersion shells (81) are also detachably connected. The lower outer end of the output pipe (3) is fitted with a pressing component (32) by a thread. Multiple evenly distributed levers (321) are fixedly installed on the pressing component (32).

5. A concentrated sulfuric acid pollution treatment device for sulfuric acid production according to claim 4, characterized in that: The interior of the first dispersion shell (8) and the second dispersion shell (81) are both of a structure that is smaller at the top and larger at the bottom. The interior of the first dispersion shell (8) is filled with filler 1, and the interior of the second dispersion shell (81) is filled with filler 2, which is two-thirds of its internal volume. Multiple dispersion holes (811) are provided at both the upper and lower ends of the first dispersion shell (8) and the second dispersion shell (81).

6. A concentrated sulfuric acid pollution treatment device for sulfuric acid production according to claim 5, characterized in that: The filter component (31) includes a filter plate support (311), which is slidably installed inside the output pipe (3). Multiple uniformly distributed fine filter plates (312) are detachably installed on the filter plate support (311), and a stabilizing support (313) is fixedly installed below the filter plate support (311).

7. A concentrated sulfuric acid pollution treatment device for sulfuric acid production according to claim 6, characterized in that: The upper part of the support frame (2) is provided with a first connecting rod (21) and the lower part of the support frame (2) is provided with a second connecting rod (22). The lower end of the first connecting rod (21) is fixedly installed with a first sliding plate (211). The top end of the second connecting rod (22) is fixedly installed with a sliding rod (23). The upper end of the sliding rod (23) is fixedly installed with a second sliding plate (231). The sliding rod (23) slides through the first sliding plate (211). The second sliding plate (231) is located above the filter plate support (311). A buffer spring (212) is fixedly connected between the second sliding plate (231) and the first sliding plate (211). The lower end of the second connecting rod (22) is fixedly installed with a protective plate (221).

8. A concentrated sulfuric acid pollution treatment device for sulfuric acid production according to claim 7, characterized in that: A bucket-shaped baffle (6) is fixedly installed below the support frame (2), and an arc-shaped baffle (7) is fixedly installed below the bucket-shaped baffle (6). A recovery component (9) is fixedly installed on one side of the pressurized housing (1). The height of the side of the arc-shaped baffle (7) close to the recovery component (9) is lower than the height of the side away from the recovery component (9).

9. A concentrated sulfuric acid pollution treatment device for sulfuric acid production according to claim 8, characterized in that: The recovery component (9) includes a collection hopper (91), which is connected to the interior of the pressurizing housing (1). A first collection pipe (92) is fixedly installed at the lower end of the collection hopper (91), and a pressure stabilizing housing (93) is fixedly installed at the lower end of the first collection pipe (92). A second collection pipe (94) is fixedly installed at the lower end of the pressure stabilizing housing (93), and the second collection pipe (94) is connected to an external concentrated sulfuric acid conveying device.

10. A concentrated sulfuric acid pollution treatment device for sulfuric acid production according to claim 9, characterized in that: The pressure stabilizing housing (93) has multiple evenly distributed balance bars (931) fixedly installed inside. The pressure stabilizing housing (93) has a sliding pressure stabilizing plate (932) inside. The pressure stabilizing plate (932) is slidably sleeved on the outside of the balance bars (931). Multiple second return springs (933) are fixedly connected between the pressure stabilizing plate (932) and the pressure stabilizing housing (93). Multiple evenly distributed flow ports (934) are opened on the pressure stabilizing plate (932). Multiple plugs (935) corresponding to the flow ports (934) are fixedly installed at the bottom inside the pressure stabilizing housing (93).

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