A fluorine-lined sulfuric acid separation tank

Abstract

The invention relates to the technical field of separation tanks, in particular to a fluorine-lined sulfuric acid separation tank, comprising a tank body, a top liquid inlet pipe, a bottom liquid outlet pipe, an air inlet pipe and internal components, wherein the air inlet pipe comprises a lower air inlet pipe and an upper air inlet pipe of different heights, which are respectively used for inputting high-concentration and low-concentration sulfuric acid mist waste gas; an adjustable distributor is provided below the liquid inlet pipe for dispersing alkali liquor input from the liquid inlet pipe, and the bottom of the distributor is connected to a rotating bottom plate with a guide pipe; a packing layer is provided within the tank body, in which a plug is pre-embedded, and the outer wall of the plug is provided with dispersion holes, and the top of the plug is provided with a one-way closed structure; the guide pipe and the plug can be controlled to be misaligned or aligned by rotating the bottom plate; a lifting plug is provided in the plug, and the dispersion holes are distributed at different heights of the plug, and the position where the alkali liquor enters the packing is controlled by the height of the lifting plug; the packing is supported by a packing support plate with an adjustable opening composed of an upper support plate and a lower support plate, thereby achieving the purpose of improving sulfuric acid separation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of separation tanks, in particular to a fluorine-lined sulfuric acid separation tank. Background Art

[0002] In industrial production, sulfuric acid mist mainly comes from lead and zinc smelting, copper, nickel and cobalt smelting, sulfuric acid industry, steel rolling process, battery manufacturing and other industries. Sulfuric acid mist not only corrodes equipment and buildings, but also causes damage to the human respiratory system. Therefore, the development of efficient sulfuric acid mist capture technology is of great significance to protecting the environment and workers' health.

[0003] At present, the acid mist treatment methods commonly used in industry mainly include two categories: suppression method and purification method. Among them, the absorption method is the most commonly used technology, which absorbs the sulfuric acid mist in the waste gas by reacting alkali solution with industrial waste gas, thereby achieving the effect of separating sulfuric acid from the gas. This treatment method is often carried out in a fluorine-lined sulfuric acid separation tank. The fluorine-lined layer can avoid the corrosion of sulfuric acid. A packing layer is usually set in the separation tank to allow the alkali solution and the sulfuric acid waste gas to fully react therein. However, when designing the current separation tank, it is usually only considered to absorb the sulfuric acid mist in the waste gas to the greatest extent. The alkali solution needs to flow slowly in the packing layer. When the sulfuric acid content in the waste gas is low, the waste gas and the alkali solution also have the maximum travel distance. Although sufficient absorption is guaranteed, the separation efficiency is relatively low. Summary of the Invention

[0004] The object of the present invention is to provide a fluorine-lined sulfuric acid separation tank to achieve the purpose of improving the sulfuric acid separation efficiency and to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a fluorine-lined sulfuric acid separation tank, comprising a tank body, a top liquid inlet pipe, a bottom liquid outlet pipe, an air inlet pipe, and internal components, wherein the air inlet pipe comprises a lower air inlet pipe and an upper air inlet pipe of different heights, respectively used for inputting high-concentration and low-concentration sulfuric acid mist exhaust gas;

[0006] An adjustable distributor is provided below the liquid inlet pipe to disperse the alkali solution input from the liquid inlet pipe. The bottom of the distributor is connected to a rotating bottom plate with a guide pipe.

[0007] A packing layer is provided inside the tank body, a plug is embedded in the packing, a dispersion hole is provided on the outer wall of the plug and a one-way closed structure is provided on the top, so that the alkali solution can be input from the middle of the packing through the plug and the dispersion hole;

[0008] By rotating the bottom plate, the guide tube and the insertion tube can be controlled to be misaligned or aligned, and the position of the alkali solution input filler can be controlled;

[0009] A lifting plug is provided in the insert, and the dispersion holes are distributed at different heights of the insert, and the position where the alkali solution enters the filler is controlled by the height of the lifting plug;

[0010] The filler is supported by an adjustable opening filler support plate consisting of an upper support plate and a lower support plate. The height of the lifting plug in the tube and the opening of the filler support plate are synchronously adjusted through a linkage mechanism to adapt to the waste gas treatment needs of different sulfuric acid mist concentrations.

[0011] Preferably, a sealing plate and a one-way stopper controlled by a torsion spring are provided on the top of the cannula to form a one-way barrier structure for waste gas, thereby preventing unreacted waste gas from escaping directly from the cannula.

[0012] Preferably, the misalignment angle of the through holes of the upper supporting plate and the lower supporting plate is negatively correlated with the concentration of sulfuric acid mist. The lower the concentration, the larger the opening and the faster the alkali solution flow rate.

[0013] Preferably, a lifting plug is provided in the intubation tube, and the lifting plug is connected to the control frame via a pull rod, and the position of the lifting plug adjusts the opening and closing state of the dispersion hole to control the initial height of the alkali solution flowing into the filler;

[0014] The height of the lifting plug is positively correlated with the concentration of sulfuric acid mist. The higher the concentration, the higher the position of the lifting plug in the cannula.

[0015] Preferably, the distributor is a cylindrical structure in which diversion pipes are arranged, and a top cover is provided on the top of the diversion pipes.

[0016] Preferably, a guide seat is installed at the bottom of the distributor, and a base plate is installed through the guide seat, and guide pipes are arranged on the base plate. A drive shaft is provided in the middle of the base plate, and the drive shaft is controlled by the driving device on the distributor to drive the base plate to rotate and adjust the position of the guide pipe on the base plate.

[0017] Preferably, a filler support plate is installed below the guide seat, and filler is filled on the filler support plate. A support frame is provided in the filler, and a cannula is pre-buried in the filler through the support frame. The distribution of the cannula corresponds to the guide pipe on the bottom plate.

[0018] The aperture of the dispersion hole is smaller than the minimum particle size of the filler material. The guide tube can be rotated to the top of the cannula or misaligned with the cannula by controlling the driving shaft.

[0019] Preferably, a center seat is installed on the top of the cannula, and sealing plates are rotatably installed on both sides of the center seat, and a torsion spring is provided on the rotating shaft of the sealing plate, and a one-way blocker is provided in the cannula, forming a one-way closed structure through the sealing plate and the center seat.

[0020] Preferably, the lifting plug can block the dispersion holes at the bottom thereof when it moves up and down in the cannula. A pull rod is connected to the lifting plug, and the pull rods in all the cannulae are connected to the same control frame, which is connected to the lifting seat.

[0021] Preferably, the lower support plate is limitedly rotatably mounted on the bottom of the upper support plate, and the two are fitted together. The upper and lower support plates are provided with corresponding through holes, and the opening of the gas-liquid channel is adjusted by rotating the lower support plate.

[0022] The lower support plate is rotated and controlled by the transmission structure, and the transmission structure is controlled by the linkage of the control frame. The higher the position of the lifting plug is, the smaller the opening of the filler support plate is.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. By setting up the lower air inlet pipe and the upper air inlet pipe, corresponding to the high and low concentration sulfuric acid mist exhaust gas input respectively, combined with the adjustable distributor and dynamic packing system, the alkali solution flow path is matched with the exhaust gas concentration, which significantly improves the separation efficiency under different working conditions. At the same time, through the precise alignment and staggered design of the rotating bottom plate guide pipe and the insert pipe in the packing, the alkali solution can be controlled to enter from the middle or top of the packing, and the gas-liquid contact time can be flexibly adjusted to ensure that the high concentration exhaust gas is fully reacted and the low concentration exhaust gas is quickly processed.

[0025] 2. The one-way closed structure at the top of the intubation tube effectively prevents unreacted waste gas from escaping directly through the intubation tube, forcing the waste gas to contact the alkali solution in the packing, thereby improving the capture rate of sulfuric acid mist. Through the setting of the lifting plug, the height of the alkali solution entering the packing can be more accurately adjusted according to the concentration when the alkali solution enters the intubation tube, and the lifting plug and the packing support plate linkage mechanism realize the synchronous adjustment of the alkali solution distribution height and the packing layer opening. At low concentrations, the alkali solution flows out quickly from the bottom of the packing, the opening is maximized, and the residence time is reduced; at high concentrations, the alkali solution is injected from the middle and upper part, the opening is reduced, and the reaction time is extended.

[0026] 3. Reduce excessive alkali consumption by precisely controlling the alkali flow rate and exhaust gas path. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the tank structure of the present invention.

[0028] Figure 2 It is a half-section schematic diagram of the tank structure of the present invention.

[0029] Figure 3 Schematic diagram of the distributor and packing support plate of the present invention.

[0030] Figure 4 Schematic diagram of the distributor structure of the present invention.

[0031] Figure 5 This is a first schematic diagram of the guide seat structure of the present invention.

[0032] Figure 6 This is a second schematic diagram of the guide seat structure of the present invention.

[0033] Figure 7 It is a schematic diagram of the insert cylinder and filler support plate structure of the present invention.

[0034] Figure 8 Schematic diagram of the insert structure of the present invention.

[0035] Figure 9 It is a half-section schematic diagram of the insert tube structure of the present invention.

[0036] Figure 10 This is a bottom schematic diagram of the filler support plate structure of the present invention.

[0037] Figure 11 Schematic diagram of the separation of the upper support plate and the lower support plate structure of the present invention.

[0038] Figure 12 Schematic diagram of the transmission structure of the present invention.

[0039] In the figure: 1. Tank body; 2. Liquid inlet pipe; 3. Liquid outlet pipe; 4. Lower air inlet pipe; 5. Upper air inlet pipe; 6. Distributor; 7. Diverter pipe; 8. Top cover; 9. Guide seat; 10. Bottom plate; 11. Guide pipe; 12. Filler support plate; 13. Support frame; 14. Insert pipe; 15. Dispersion hole; 16. Center seat; 17. Closing plate; 18. One-way block; 19. Drive shaft; 20. Lifting plug; 21. Pull rod; 22. Control frame; 23. Lifting seat; 24. Upper support plate; 25. Lower support plate; 26. Through hole; 27. Bevel gear ring; 28. Support; 29. ​​Transmission shaft; 30. Bevel gear; 31. Transmission gear; 32. Rack; 33. Hanging rod. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. It should be noted that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] See also Figures 1 to 12The present invention provides a technical solution: a fluorine-lined sulfuric acid separation tank, which adopts a cylindrical tank body 1 structure, a fluorine-lined layer is provided inside the tank body 1, a liquid inlet pipe 2 is provided on the top, and a liquid outlet pipe 3 is provided on the bottom, and an air inlet pipe is provided on the lower side of the tank body 1. Alkali liquid for absorbing acid mist is provided from the liquid inlet pipe 2 to the tank body 1, and waste gas containing sulfuric acid mist is sent into the tank body 1 from the air inlet pipe, so that the alkali liquid flows downward and the waste gas flows upward. The reaction is completed in the process of liquid-gas contact, so that the sulfuric acid mist is discharged from the tank body 1. The waste gas is separated and absorbed, and the liquid after the reaction is recovered from the liquid outlet pipe 3, and the air inlet pipe of the present invention is divided into a lower air inlet pipe 4 and an upper air inlet pipe 5. The lower air inlet pipe 4 is lower than the upper air inlet pipe 5. When the waste gas is input from the lower air inlet pipe 4, the waste gas has a longer travel distance and can be in contact with the alkali solution for a longer time. When the waste gas is input from the upper air inlet pipe 5, the waste gas can be discharged from the top of the tank body 1 faster. Therefore, the lower air inlet pipe 4 and the upper air inlet pipe 5 are used for the input of high-concentration sulfuric acid waste gas and low-concentration sulfuric acid waste gas, respectively.

[0042] like Figure 2 As shown, a distributor 6 is provided below the liquid inlet pipe 2 for dispersing the alkali solution entering from the liquid inlet pipe 2 and transporting it downward to ensure that the alkali solution can cover all the waste gas. The distributor 6 is a cylindrical structure in which diversion pipes 7 are arranged, and a top cover 8 is provided on the top of the diversion pipe 7. When the alkali solution is input through the liquid inlet pipe 2 at the center of the tank body 1, the alkali solution falls into the distributor 6. Since the diversion pipe 7 has a certain height, only when the alkali solution accumulates to a certain height will it simultaneously overflow into all the diversion pipes 7, thereby adding liquid simultaneously within the entire cross-sectional area of ​​the tank body 1.

[0043] like Figure 3-Figure 6 As shown, further, a guide seat 9 is installed at the bottom of the distributor 6, and a rotatable base plate 10 is installed through the guide seat 9. Guide pipes 11 are arranged on the base plate 10. The base plate 10 with the guide pipes 11 is used as a buffer to further disperse the alkali solution. A driving shaft 19 is provided in the middle of the base plate 10, and a driving device is provided in the middle of the distributor 6, which can control the driving shaft 19 to drive the base plate 10 to rotate, thereby adjusting the position of the guide pipe 11 on the base plate 10, so that the alkali solution falls according to the set position. The driving device can adopt a structure including a stepping motor and is installed in a corrosion-resistant driving seat.

[0044] like Figure 7 、 Figure 8As shown, at the same time, a filler support plate 12 is installed in the tank body 1, and the filler support plate 12 is installed below the guide seat 9. The filler is filled on the filler support plate 12, and a complex gas-liquid flow channel is formed by the filler, so that the alkali solution and the exhaust gas can fully react therein. A support frame 13 is provided in the filler of the present invention, and a plug 14 is pre-buried in the filler through the support frame 13. The distribution of the plug 14 corresponds one-to-one to the guide pipe 11 on the bottom plate 10. A dispersion hole 15 is provided on the outer wall of the plug 14. The aperture of the dispersion hole 15 is smaller than the minimum particle size of the filler material, and the filler will not block the dispersion hole 15. Through the control of the drive shaft 19, the guide pipe 11 can be rotated to the top of the plug 14 to send the alkali solution into the plug 14, so that the alkali solution enters the middle of the filler from the dispersion hole 15, or the guide pipe 11 and the plug 14 are misaligned so that the alkali solution falls directly on the top of the filler. The two correspond to the low and high concentrations of sulfuric acid mist in the exhaust gas respectively. When the concentration is low, the time required for alkali solution to neutralize the sulfuric acid mist in the exhaust gas is short. Inputting the alkali solution from the middle of the packing can reduce its flow neutralization time and increase the efficiency of sulfuric acid separation. Conversely, when the concentration of sulfuric acid mist is high, the alkali solution is input from the top of the packing to ensure sufficient reaction time.

[0045] like Figure 9 As shown, the dispersion holes 15 are distributed on the insert tube 14, which have different heights, so as to further control the position of the alkali solution flowing into the filler. A center seat 16 is installed on the top of the insert tube 14, and sealing plates 17 are rotatably installed on both sides of the center seat 16. A torsion spring is provided on the rotating shaft of the sealing plate 17. The sealing plate 17 can be in an expanded state through the action of the torsion spring. The sealing plate 17 contacts the inner wall of the insert tube 14, and a one-way stopper 18 is provided in the insert tube 14 to limit the position of the sealing plate 17 in one direction. The sealing plate 17 and the center seat 16 can form a one-way closed structure. When the alkali solution does not enter the insert tube 14 from the top but directly enters the filler, the sealing plate 17 can block the exhaust gas to prevent Prevent the waste gas from escaping directly from the insert tube 14 without reacting with the alkali solution; at the same time, a lifting plug 20 is provided in the insert tube 14. When the lifting plug 20 moves up and down in the insert tube 14, it can block the dispersion hole 15 at its bottom, so that the alkali solution flows out from the dispersion hole 15 at its top, thereby fine-tuning the effect of the height of the alkali solution entering the filler according to the concentration of sulfuric acid mist in the waste gas, controlling the alkali solution neutralization time, and improving work efficiency. A pull rod 21 is connected to the lifting plug 20, and the pull rods 21 in all the insert tubes 14 are connected to the same control frame 22, and the control frame 22 is connected to the lifting seat 23 in the middle of the support frame 13. The lifting seat 23 adopts an electric push rod or a cylinder structure, which can drive all the lifting plugs 20 to adjust the height.

[0046] like Figure 10-12As shown, the packing support plate 12 of the present invention is composed of an upper support plate 24 and a lower support plate 25. The lower support plate 25 is limited and rotatably mounted on the bottom of the upper support plate 24. The two are arranged in a close fit. Corresponding through holes 26 are provided on the upper support plate 24 and the lower support plate 25. When the through holes 26 on the two overlap, the gas-liquid channel of the packing support plate 12 is at the maximum opening. Conversely, when the lower support plate 25 rotates, the through holes 26 on the upper support plate 24 and the lower support plate 25 will be misaligned, thereby achieving the effect of adjusting the opening of the gas-liquid channel. The lower support plate 25 is rotationally controlled by a transmission structure. A bevel gear ring 27 is installed on the edge of the lower support plate 25, and a support 28 is installed on the bottom surface of the upper support plate 24. A transmission shaft 29 is provided in the support 28, and the two ends of the transmission shaft 29 are respectively connected There are bevel gears 30 and transmission gears 31, wherein the bevel gear 30 is meshed with the bevel gear ring 27, and a vertical suspension rod 33 is connected to the control frame 22, and the suspension rod 33 is set through the upper support plate 24, and a rack 32 is installed at the bottom end of the suspension rod 33, which is meshed with the transmission gear 31, so as to achieve the effect of driving the lower support plate 25 to rotate while adjusting the lifting plug 20 by the control frame 22. When the lifting plug 20 rises, so that the height of the alkali solution entering the filler rises, the control frame 22 drives the rack 32 to move, and the rack 32 causes the transmission gear 31 to rotate, thereby causing the bevel gear 30 to drive the bevel gear ring 27 to rotate, and the lower support plate 25 rotates accordingly. The through holes 26 on the lower support plate 25 and the upper support plate 24 are misaligned, and the opening of the gas-liquid channel is reduced. When the alkali solution enters the intubation 14, the concentration of sulfuric acid mist in the exhaust gas is relatively low. Within this concentration range, when the height of the lifting plug 20 rises, the corresponding concentration gradually increases. At this time, the opening of the gas-liquid channel decreases, which slows down the flow rate of the alkali solution and enables it to more fully contact and react with the exhaust gas. On the contrary, when the alkali solution enters the filler from the bottom of the intubation 14, the opening of the gas-liquid channel is the largest, and the alkali solution enters the bottom of the tank body 1 at the fastest flow rate to complete recovery. This is the state corresponding to the lowest concentration of sulfuric acid mist in the exhaust gas. When the concentration of sulfuric acid mist is relatively high, the alkali solution starts to flow down from the top layer of the filler.

[0047] The through holes 26 of the upper supporting plate 24 and the lower supporting plate 25 are provided with a mesh structure, which can prevent the loss of filler and ensure the normal passage of gas and liquid.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A fluorine-lined sulfuric acid separation tank, comprising a tank body, a top liquid inlet pipe, a bottom liquid outlet pipe, an air inlet pipe, and internal components, characterized in that: The air inlet pipe comprises a lower air inlet pipe and an upper air inlet pipe of different heights, which are used for inputting high-concentration and low-concentration sulfuric acid mist exhaust gas respectively; An adjustable distributor is provided below the liquid inlet pipe for dispersing the alkali solution input from the liquid inlet pipe, and the bottom of the distributor is connected to a rotating bottom plate with a guide pipe; The tank body is provided with a packing layer, a pre-buried insert tube in the packing, a dispersion hole is provided on the outer wall of the insert tube and a one-way closed structure is provided on the top, so that the effect of inputting alkali solution from the middle of the packing is achieved through the insert tube and the dispersion hole; By rotating the bottom plate, the guide tube and the insertion tube can be controlled to be misaligned or aligned, and the position of the alkali solution input filler can be controlled; The insert is provided with a lifting plug, and the dispersion holes are distributed at different heights of the insert, and the position where the alkali solution enters the filler is controlled by the height of the lifting plug; The filler is supported by an adjustable opening filler support plate consisting of an upper support plate and a lower support plate. The height of the lifting plug in the tube and the opening of the filler support plate are synchronously adjusted through a linkage mechanism to adapt to the waste gas treatment needs of different sulfuric acid mist concentrations.

2. A fluorine-lined sulfuric acid separation tank according to claim 1, characterized in that: A sealing plate and a one-way stopper controlled by a torsion spring are provided on the top of the cannula to form a one-way waste gas barrier structure to prevent unreacted waste gas from escaping directly from the cannula.

3. The fluorine-lined sulfuric acid separation tank according to claim 1, characterized in that: The staggered angle of the through holes of the upper supporting plate and the lower supporting plate is negatively correlated with the concentration of the sulfuric acid mist. The lower the concentration, the larger the opening and the faster the alkali solution flow rate.

4. The fluorine-lined sulfuric acid separation tank according to claim 1, characterized in that: A lifting plug is provided in the intubation tube, and the lifting plug is connected to the control frame through a pull rod. The position of the lifting plug adjusts the opening and closing state of the dispersion hole to control the initial height of the alkali solution flowing into the filler; The height of the lifting plug is positively correlated with the concentration of sulfuric acid mist. The higher the concentration, the higher the position of the lifting plug in the cannula.

5. The fluorine-lined sulfuric acid separation tank according to claim 1, characterized in that: The distributor is a cylindrical structure in which diversion pipes are arranged and a top cover is provided on the top of the diversion pipes.

6. The fluorine-lined sulfuric acid separation tank according to claim 5, characterized in that: A guide seat is installed at the bottom of the distributor, and a base plate is installed through the guide seat. Guide pipes are arranged on the base plate, and a driving shaft is provided in the middle of the base plate. The driving shaft is controlled by the driving device on the distributor to drive the base plate to rotate and adjust the position of the guide pipe on the base plate.

7. The fluorine-lined sulfuric acid separation tank according to claim 6, characterized in that: The filler support plate is installed below the guide seat, and filler is filled on the filler support plate. A support frame is provided in the filler, and insert pipes are embedded in the filler through the support frame. The distribution of the insert pipes corresponds to the guide pipes on the bottom plate.

8. The fluorine-lined sulfuric acid separation tank according to claim 7, characterized in that: The aperture of the dispersion holes is smaller than the minimum particle size of the filler material. The flow guide tube can be rotated to the top of the cannula or be misaligned with the cannula by the control of the driving shaft.

9. The fluorine-lined sulfuric acid separation tank according to claim 1, characterized in that: A center seat is installed on the top of the cannula, and sealing plates are rotatably installed on both sides of the center seat. A torsion spring is provided on the rotating shaft of the sealing plate, and a one-way stopper is provided in the cannula to form a one-way closed structure through the sealing plate and the center seat.

10. The fluorine-lined sulfuric acid separation tank according to claim 9, characterized in that: When the lifting plug moves up and down in the cannula, it can block the dispersion holes at the bottom thereof. The lifting plug is connected to a pull rod, and the pull rods in all the cannulae are connected to the same control frame, which is connected to the lifting seat.

11. The fluorine-lined sulfuric acid separation tank according to claim 10, characterized in that: The lower support plate is limitedly rotatably mounted on the bottom of the upper support plate, and the two are fitted together. Corresponding through holes are provided on the upper and lower support plates, and the effect of adjusting the opening of the gas-liquid channel is achieved by rotating the lower support plate.

12. The fluorine-lined sulfuric acid separation tank according to claim 11, characterized in that: The lower supporting plate is rotationally controlled by a transmission structure, and the transmission structure is controlled by a linkage with a control frame. The higher the position of the lifting plug is, the smaller the opening of the filler supporting plate is.

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