Tower top demisting device for sulfuric acid tail gas treatment

Abstract

The utility model discloses a tower top demisting device for sulfuric acid tail gas treatment, which comprises a box body, the right side end of the box body is connected with an external tail gas supply pipeline, a pretreatment mechanism is arranged in the box body, the other end of the box body is communicated with a treatment box through a transfer pipe, and the whole transfer pipe is an arc-shaped pipeline extending upwards. According to the tower top demisting device for sulfuric acid tail gas treatment, the problems that a pretreatment mechanism is not installed at the front end of an electric demister in an existing device, the treatment burden of the demister of electric equipment is easily increased, and the treatment efficiency is high are solved. However, the electric appliance is generally installed on the tower top, if load operation processing is carried out, the failure rate is increased, and the follow-up maintenance difficulty is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfuric acid tail gas treatment equipment, in particular to a top - mounted demisting device for sulfuric acid tail gas treatment. Background Art

[0002] Sulfuric acid tail gas is mainly waste gas containing pollutants such as sulfur dioxide and sulfur trioxide generated during the production of sulfuric acid. Sulfuric acid is an important chemical raw material, widely used in multiple industries such as fertilizer production, oil refining, and metal processing. During the production of sulfuric acid, it is inevitable to generate tail gas containing sulfur oxides. If these tail gases are directly discharged into the atmosphere without treatment, they will cause serious pollution to the environment. The purpose of sulfuric acid tail gas treatment is to reduce the emission of these harmful substances to reduce their harm to the ecological environment and human health. The discharged tail gas contains a large amount of acidic substances and acid mist, posing a serious threat to the environment and human health. Therefore, a demisting device needs to be installed at the top of the tower to separate the acid mist in the tail gas.

[0003] Currently, the demisting device mainly includes components such as demisting wire mesh, baffle demister, hollow sphere packing layer, and cyclone. Although the above - mentioned mechanisms can complete the work of removing acid mist, there are also problems: no pretreatment mechanism is installed at the front end of the electrostatic demister, which easily increases the processing burden on the electrostatic demister of electrical equipment. And such electrical appliances are generally installed at the top of the tower. If they operate under load, it will increase the failure rate and the difficulty of subsequent maintenance.

[0004] Therefore, it is necessary to provide a top - mounted demisting device for sulfuric acid tail gas treatment to solve the above - mentioned technical problems. Content of the Utility Model

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a top - mounted demisting device for sulfuric acid tail gas treatment to solve the problem that the existing device does not install a pretreatment mechanism at the front end of the electrostatic demister, which easily increases the processing burden on the electrostatic demister of electrical equipment. And such electrical appliances are generally installed at the top of the tower. If they operate under load, it will increase the failure rate and the difficulty of subsequent maintenance.

[0006] To achieve the above - mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0007] A top - mounted demisting device for sulfuric acid tail gas treatment, comprising: a box body;

[0008] The right - hand end of the box body is connected to an external tail gas supply pipeline. A pretreatment mechanism is installed inside the box body. The other end of the box body is communicated with a treatment box through a transfer pipe. The transfer pipe is an arc - shaped pipe extending upward as a whole. A flow - turning box is installed on the bottom surface of the arc - shaped section of the transfer pipe. The top surface of the treatment box is communicated with the inside of a protection box. The top surface of the protection box is connected to an electrical demisting component above through a discharge pipe.

[0009] In one embodiment, a filler is installed inside the protective box. The filler is a spherical filler as a whole, and a drain pipe is arranged at the installation end of the filler and the protective box.

[0010] In one embodiment, the pretreatment mechanism is composed of a fan blade, a rotating shaft, a baffle, an air inlet, a collection box, and a scraper. The fan blade is sleeved on the rotating shaft. Both ends of the rotating shaft are connected to the inner wall of the box body. A motor is installed at one end of the rotating shaft close to the transfer pipe. The middle part of the rotating shaft is located at the central hole of the baffle. The diameter of the baffle is the same as the inner diameter of the box body, and the two are connected by bolt installation. The outer peripheral end surface of the baffle is provided with air inlets in an annular array. A collection box is installed at the lower part of the front end surface of the baffle. A scraper is installed on the rod body of the rotating shaft. The scraping end of the scraper is attached to the front end surface of the baffle. The length of the scraper is equal to the radius of the baffle. The rotation range of the scraper is within the top opening of the collection box. The bottom of the collection box is connected to an external discharge pipe.

[0011] In one embodiment, a processing box is installed inside the processing tank. The processing box is in the shape of a circular plate as a whole, and multiple groups of current collection boxes are arranged in an annular array on its top surface.

[0012] In one embodiment, the current collection box is in the shape of a hollow hemisphere as a whole. A round hole is opened at the center of the top of its spherical surface. The inner wall surface of the current collection box is provided with diversion grooves in an annular array.

[0013] The beneficial effects of the present utility model are as follows:

[0014] (1) By starting the motor to drive the rotation of the rotating shaft, the fan blade is synchronously driven to rotate. The tail gas is input into the box body through the external tail gas supply air pipe. The fan blade assists in blowing air. When the tail gas containing acid mist passes through the baffle, the acid mist condenses on the front end surface of the baffle and is scraped off by the scraper. A small part of the tail gas containing acid mist is sent into the transfer pipe through the air inlet, and the scraped acid liquid enters the collection box and is discharged, so that the tail gas containing acid mist is effectively pre-treated initially, reducing the processing load of the subsequent electrical unit.

[0015] (2) Through the setting of the processing tank and the protective box, after the tail gas processed by the pretreatment mechanism has a reduced acid mist content, the processing tank and the protective box filter the remaining gas, further reducing the processing load of the subsequent electrical unit and improving the service life of the electrical appliance. Description of the Drawings

[0016] Figure 1 is the overall structure diagram of the present utility model;

[0017] Figure 2 is the internal detail diagram of the filler and the processing box of the present utility model;

[0018] Figure 3 This is the detailed view of the pretreatment mechanism of the present utility model;

[0019] Figure 4 This is the detailed view of the current collector box of the present utility model.

[0020] Among them, the names corresponding to the reference numerals are: box body 1, adapter pipe 2, treatment box 3, treatment box 31, current collector box 32, round hole 33, diversion groove 34, protection box 4, filler 41, discharge pipe 5, pretreatment mechanism 6, fan blade 61, rotating shaft 62, baffle 63, air inlet 64, collection box 65, scraper 66. Specific embodiments

[0021] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. The embodiments of the present utility model include but are not limited to the following examples.

[0022] As Figure 1 - Figure 2 shown, a top demisting device for sulfuric acid tail gas treatment provided by the present utility model includes: box body 1, adapter pipe 2, treatment box 3, protection box 4, discharge pipe 5;

[0023] As Figure 1 shown, the right end of the box body 1 is connected to an external tail gas supply pipeline. A pretreatment mechanism 6 is installed inside the box body 1. The other end of the box body 1 is communicated with the treatment box 3 through the adapter pipe 2. The adapter pipe 2 is an arc-shaped pipe extending upward as a whole. A flow diversion box is installed on the bottom surface of the arc section of the adapter pipe 2. The top surface of the treatment box 3 is communicated with the inside of the protection box 4. The top surface of the protection box 4 is connected to an electrical demisting component above through the discharge pipe 5.

[0024] Preferably, in one embodiment, as Figure 1 - Figure 2 shown, a filler 41 is installed inside the protection box 4. The filler 41 is a spherical filler as a whole. A drain pipe is provided at the installation end of the filler 4 and the protection box 4.

[0025] Preferably, in one embodiment, as Figure 1 、 Figure 3As shown in the figure, the pretreatment mechanism 6 is composed of a fan blade 61, a rotating shaft 62, a baffle 63, an air inlet 64, a collection box 65, and a scraper 66. The fan blade 61 is sleeved on the rotating shaft 62. Both ends of the rotating shaft 62 are connected to the inner wall of the box body 1. A motor is installed at one end of the rotating shaft 62 close to the transfer pipe 2. The middle part of the rotating shaft 62 is located at the central hole of the baffle 63. The diameter of the baffle 63 is the same as the inner diameter of the box body 1, and the two are bolted together. The outer peripheral end surface of the baffle 63 is provided with air inlets 64 in an annular array. A collection box 65 is installed at the lower part of the front end surface of the baffle 63. A scraper 66 is installed on the rod body of the rotating shaft 62. The scraping end of the scraper 66 is attached to the front end surface of the baffle 63. The length of the scraper 66 is equal to the radius of the baffle 63. The rotation range of the scraper 66 is within the top opening of the collection box 65. The bottom of the collection box 65 is connected to an external discharge pipe. During operation, the motor is started to drive the rotating shaft 62 to rotate, synchronously driving the fan blade 61 to rotate. The tail gas is input into the interior of the box body 1 through the external tail gas supply air pipe, and the fan blade 61 assists in blowing air. When the tail gas containing acid mist passes through the baffle 63, the acid mist condenses on the front end surface of the baffle 63 and is scraped off by the scraper 66. A small part of the tail gas containing acid mist is sent into the interior of the transfer pipe 2 from the air inlets 64, and the scraped acid liquid enters the collection box 65 and is discharged, enabling the tail gas containing acid mist to be effectively pre-treated initially and reducing the processing load of the subsequent electrical unit.

[0026] Preferably, in one embodiment, as Figure 2 、 Figure 4 shown, a processing box 31 is installed inside the processing box 3. The processing box 31 is in the shape of a circular plate as a whole, and a plurality of current collection boxes 32 are arranged in an annular array on its top surface. Through the arrangement of the plurality of current collection boxes 32, it is helpful to perform a split-flow treatment on the tail gas containing acid mist after pretreatment.

[0027] Preferably, in one embodiment, as Figure 4 shown, the current collection box 32 is in the shape of a hollow hemisphere as a whole, and a round hole 33 is opened at the center of the top of its spherical surface. The inner wall surface of the current collection box 32 is provided with diversion grooves 34 in an annular array. During operation, due to the inner wall surface structure of the current collection box 32, the tail gas containing acid mist is forced to be discharged from the round hole 33 into the interior of the packing 41 for filtration. Since the round hole 33 is at the center, the acid liquid gradually condenses into a droplet shape through the cooperation of the diversion grooves 34 and the spherical inner wall, and flows back to the interior of the flow conversion box at the bottom surface of the transfer pipe 2 for discharge.

[0028] The working principle of the present utility model:

[0029] During operation, the rotation of the shaft 62 is driven by starting the motor, and the fan blade 61 is synchronously driven to rotate. The tail gas is input into the interior of the box body 1 through the external tail gas supply air duct, and the fan blade 61 assists in blowing air. When the tail gas containing acid mist passes through the baffle 63, the acid mist condenses on the front end face of the baffle 63 and is scraped off by the scraper 66. A small part of the tail gas containing acid mist is sent into the adapter pipe 2 from the air inlet 64, and the scraped acid liquid enters the collection box 65 and is discharged. Due to the inner wall surface structure of the flow collecting box 32, the tail gas containing acid mist is forced to be discharged from the round hole 33 into the filler 41 for filtration. Since the round hole 33 is at the center, the acid liquid gradually condenses into a droplet shape through the cooperation of the diversion groove 34 and the spherical inner wall, and then flows back to the interior of the flow diversion box at the bottom surface of the adapter pipe 2 for discharge.

[0030] The above embodiments are only one of the preferred embodiments of the present invention and should not be used to limit the protection scope of the present invention. Any meaningless modifications or touch-ups made on the main design concept and spirit of the present invention, as long as the technical problems solved are still consistent with those of the present invention, should be included in the protection scope of the present invention.

Claims

1. A demisting device at the top of the tower for sulfuric acid tail gas treatment, characterized in that, Including: Box body; The right end of the box body is connected to an external tail gas supply pipeline. A pretreatment mechanism is installed inside the box body. The other end of the box body is communicated with a treatment box through a transfer pipe. The transfer pipe is an arc-shaped pipe extending upward as a whole. A flow diversion box is installed on the bottom surface of the arc section of the transfer pipe. The top surface of the treatment box is communicated with the inside of a protection box. The top surface of the protection box is connected to an electric demisting component above through a discharge pipe.

2. The demisting device at the top of the tower for sulfuric acid tail gas treatment according to claim 1, wherein, A filler is installed inside the protection box. The filler is a spherical filler as a whole. A drain pipe is arranged at the installation end of the filler and the protection box.

3. A demisting device at the top of the tower for sulfuric acid tail gas treatment according to claim 1, characterized in that, The pretreatment mechanism is composed of a fan blade, a rotating shaft, a baffle plate, an air inlet, a collection box, and a scraper. The fan blade is sleeved on the rotating shaft. The two ends of the rotating shaft are respectively connected to the inner wall of the box body. A motor is installed at one end of the rotating shaft close to the transfer pipe. The middle part of the rotating shaft is at the center hole of the baffle plate. The diameter of the baffle plate is the same as the inner diameter of the box body, and the two are bolted and connected. Air inlets are arranged in an annular array at the end of the outer peripheral surface of the baffle plate. A collection box is installed at the lower part of the front end surface of the baffle plate. A scraper is installed on the rod body of the rotating shaft. The scraping end of the scraper is attached to the front end surface of the baffle plate. The length of the scraper is equal to the radius of the baffle plate. The rotation range of the scraper is within the top surface opening of the collection box. The bottom of the collection box is connected to an external discharge pipe.

4. The demisting device at the top of the tower for sulfuric acid tail gas treatment according to claim 1, wherein, A treatment box is installed inside the treatment box. The treatment box is in a circular plate shape as a whole, and multiple groups of flow collection boxes are arranged in an annular array on its top surface.

5. The demisting device at the top of the tower for sulfuric acid tail gas treatment according to claim 4, wherein The flow collection box is a hollow hemispherical shape as a whole. A round hole is opened at the center of the top of its spherical surface. Flow guiding grooves are arranged in an annular array on the inner wall surface of the flow collection box.

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