Tail gas acid removal apparatus

Abstract

The utility model provides a tail gas acid removal equipment. The tail gas acid removal equipment includes lye container, reverse spray pipe and electric demisting device, and the reverse spray pipe is connected with the air inlet of electric demisting device, and the inside of reverse spray pipe is equipped with the shower nozzle, and the spray direction of shower nozzle is opposite with the tail gas flow direction in reverse spray pipe, and the lye container is connected with the shower nozzle to supply lye to the shower nozzle, and one end of electric demusting device is equipped with air inlet and air outlet, and the tail gas channel of electric demusting device extends from air inlet to the other end of electric demusting device and then extends to air outlet. The tail gas acid removal equipment of the utility model, the tail gas is contacted with the lye that the shower nozzle sprays in the process of being supplied to air inlet by reverse spray pipe, thereby neutralizing the acid mist carried by tail gas, and reducing the acid mist amount carried by tail gas into electric demusting device, and the tail gas channel of electric demusting device extends from air inlet of one end to the other end and then extends to air outlet of one end, so as to improve the travel of tail gas in tail gas channel, thereby improving the effect of removing acid mist of tail gas in tail gas channel.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment, specifically to an exhaust gas acid removal device. Background Technology

[0002] In the sulfuric acid industry, the exhaust gas carries acid mist and cannot be directly discharged into the atmosphere; therefore, it needs to be deaerated before emission. One related technology uses electrostatic precipitators to treat the exhaust gas for acid removal, but the deaeration effect is poor. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose an exhaust gas acid removal device.

[0005] The tail gas deacidification device according to this utility model embodiment includes:

[0006] The device includes an alkali container, a backspray nozzle, and an electrostatic precipitator. The backspray nozzle is connected to the air inlet of the electrostatic precipitator and is used to supply exhaust gas to the electrostatic precipitator. The backspray nozzle has a nozzle inside, and the spray direction of the nozzle is opposite to the exhaust gas flow direction in the backspray nozzle. The alkali container is connected to the nozzle to supply alkali to the nozzle. One end of the electrostatic precipitator has the air inlet and the air outlet. The electrostatic precipitator has an exhaust gas passage connecting the air inlet and the air outlet. The exhaust gas passage extends from the air inlet to the other end of the electrostatic precipitator and then to the air outlet.

[0007] The exhaust gas acid removal device of this utility model embodiment has a reverse spray pipe connected upstream of the air inlet of the electrostatic precipitator. During the process of the exhaust gas being supplied to the air inlet from the reverse spray pipe, it comes into contact with the alkaline solution sprayed from the nozzle, thereby neutralizing the acid mist carried by the exhaust gas and reducing the amount of acid mist carried by the exhaust gas entering the electrostatic precipitator. The exhaust gas channel of the electrostatic precipitator extends from the air inlet at one end to the air outlet at the other end, so as to increase the travel of the exhaust gas in the exhaust gas channel, thereby improving the effect of removing acid mist in the exhaust gas channel.

[0008] In some embodiments, the exhaust gas deacidification device further includes a reflux pipe, the inlet end of which is located at the electrostatic precipitator and communicates with the bottom of the exhaust gas channel, and the outlet end of which is connected to the alkali container.

[0009] In some embodiments, the exhaust gas deacidification device further includes an alkali pump and a supply pipe. The alkali pump is connected between the alkali container and the inlet end of the supply pipe to supply alkali in the alkali container to the supply pipe. The outlet end of the supply pipe is connected to the nozzle.

[0010] In some embodiments, the exhaust gas deacidification device further includes a stirring element, the alkali container is provided with a water inlet and an alkali inlet, and the stirring element is connected to the alkali container to stir the medium in the alkali container.

[0011] In some embodiments, the stirring element is a stirring tube, which is connected between one of the alkali pump and the supply pipe and the alkali container. The stirring tube is provided with a first switching valve, and the supply pipe is provided with a second switching valve.

[0012] In some embodiments, the nozzles are at least two arranged at intervals along the extension direction of the reverse nozzle.

[0013] In some embodiments, the electrostatic precipitator includes a precipitator container, a partition, and a precipitator electrode. The bottom end of the precipitator container is provided with the air inlet and the air outlet. The partition is disposed in the inner cavity of the precipitator container and spaced between the arrangement directions of the air inlet and the air outlet. The partition extends upward from the bottom surface of the inner cavity of the precipitator container and is lower than the top surface of the inner cavity of the precipitator container, thereby forming the exhaust gas passage in the inner cavity of the precipitator container. The precipitator electrode is disposed in the exhaust gas passage.

[0014] In some embodiments, the demisting electrode is arranged laterally in the inner cavity of the demisting container and is located above the air inlet and the air outlet. The baffle passes through the demisting electrode, and the top of the baffle is not lower than the demisting electrode.

[0015] In some embodiments, the electrostatic precipitator further includes a distribution plate, which has a plurality of through holes for exhaust gas to pass through. The distribution plate is arranged laterally in the inner cavity of the precipitator and is located above the air inlet and the air outlet. The partition passes through the distribution plate, and the top of the partition is not lower than the distribution plate.

[0016] In some embodiments, the electrostatic precipitator further includes a hot air blower and a cleaning device, both of which are located on top of the precipitator and communicate with the inner cavity of the precipitator. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the tail gas deacidification device according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the electrostatic precipitator of the exhaust gas deacidification equipment according to an embodiment of the present utility model; Figure 3 yes Figure 2 Top view of the defogger container; Figure 4 yes Figure 2 A schematic diagram of the distribution plate; Figure 5 yes Figure 2 A schematic diagram of the partition.

[0018] Figure label: 1. Alkali container; 11. Water inlet; 12. Alkali inlet; 2. Backspray pipe; 21. Nozzle; 3. Electrostatic precipitator; 31. Air inlet; 32. Air outlet; 33. Exhaust gas passage; 34. Demisting container; 35. Baffle plate; 351. Reinforcing rib; 36. Demisting electrode; 37. Distribution plate; 371. Through hole; 38. Hot air blower; 39. Cleaning device; 310. Support frame; 311. Mounting frame; 4. Return pipe; 5. Alkali pump; 6. Supply pipe; 61. Second switch valve; 7. Stirring pipe; 71. First switch valve. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] The following is for reference. Figures 1-5 This invention describes an exhaust gas deacidification device according to an embodiment of the present invention.

[0021] like Figures 1-5 As shown, the exhaust gas deacidification device of this utility model embodiment includes an alkaline solution container 1, a reverse spray pipe 2, and an electrostatic precipitator 3.

[0022] The reverse nozzle 2 is connected to the air inlet 31 of the electrostatic precipitator 3, and is used to supply exhaust gas to the electrostatic precipitator 3. For example... Figure 1 As shown, the reverse nozzle 2 is used for the passage of exhaust gas. Along the flow direction of the exhaust gas, the reverse nozzle 2 is connected upstream of the air inlet 31 of the electrostatic precipitator 3. The exhaust gas first passes through the reverse nozzle 2 and then enters the electrostatic precipitator 3 through the air inlet 31.

[0023] The reverse nozzle 2 is equipped with a nozzle 21 inside. The spray direction of the nozzle 21 is opposite to the exhaust gas direction inside the reverse nozzle 2. The alkali container 1 is connected to the nozzle 21 to supply alkali solution to the nozzle 21. Figure 1 As shown, the exhaust gas flows from top to bottom along the reverse nozzle 2. The reverse nozzle 2 is equipped with a nozzle 21, which is connected to the alkaline solution container 1. The alkaline solution container 1 is used to store alkaline solution and supply it to the nozzle 21. The nozzle 21 is used to spray alkaline solution upward so that the alkaline solution can fully contact the exhaust gas, thereby neutralizing the acid mist in the exhaust gas through the alkaline solution, thus reducing the amount of acid mist in the exhaust gas that enters the electrostatic precipitator 3 through the air inlet 31.

[0024] The electrostatic precipitator 3 has an air inlet 31 and an air outlet 32 ​​at one end. The electrostatic precipitator 3 also has an exhaust gas passage 33 connecting the air inlet 31 and the air outlet 32. The exhaust gas passage 33 extends from the air inlet 31 to the other end of the electrostatic precipitator 3 and then to the air outlet 32. Figure 1 As shown, the electrostatic precipitator 3 preferably, but not limited to, has an air inlet 31 and an air outlet 32 ​​at its bottom. The air inlet 31 is used for the exhaust gas to enter the electrostatic precipitator 3, and the air outlet 32 ​​is used for the exhaust gas to exit the electrostatic precipitator 3. The electrostatic precipitator 3 has an exhaust gas passage 33 inside for the exhaust gas to flow. The exhaust gas passage 33 is connected between the air inlet 31 and the air outlet 32. During the flow of the exhaust gas along the exhaust gas passage 33, the acid mist is removed by the electrostatic precipitator 3. The exhaust gas passage 33 extends upward from the air inlet 31 to the top of the electrostatic precipitator 3 and then downward to the air outlet 32, so that the exhaust gas passage 33 has a larger stroke, thereby improving the effect of the electrostatic precipitator 3 in removing acid mist from the exhaust gas.

[0025] In this embodiment of the exhaust gas acid removal equipment, a reverse spray pipe 2 is provided upstream of the air inlet 31 of the electrostatic precipitator 3. During the process of the exhaust gas being supplied to the air inlet 31 from the reverse spray pipe 2, it comes into contact with the alkaline solution sprayed from the nozzle 21, thereby neutralizing the acid mist carried by the exhaust gas and reducing the amount of acid mist carried by the exhaust gas entering the electrostatic precipitator 3. The exhaust gas passage 33 of the electrostatic precipitator 3 extends from the air inlet 31 at one end to the air outlet 32 ​​at the other end, so as to increase the travel of the exhaust gas in the exhaust gas passage 33, thereby improving the effect of removing acid mist in the exhaust gas passage 33.

[0026] In some embodiments, the exhaust gas deacidification device further includes a return pipe 4, the inlet end of which is located at the electrostatic precipitator 3 and connected to the bottom of the exhaust gas channel 33, and the outlet end of the return pipe 4 is connected to the alkaline solution container 1.

[0027] like Figure 1 As shown, the reverse nozzle 2 extends from top to bottom. The outlet end of the reverse nozzle 2 is connected to the air inlet 31. The alkaline solution sprayed from the nozzle 21 flows downward to the outlet end of the reverse nozzle 2, and then enters the exhaust gas passage 33 of the electrostatic precipitator 3 through the air inlet 31 with the exhaust gas, and accumulates at the bottom of the exhaust gas passage 33.

[0028] The inlet end of the return pipe 4 is connected to the bottom end of the electrostatic precipitator 3 and communicates with the bottom of the exhaust gas channel 33, so that the alkaline solution accumulated at the bottom of the exhaust gas channel 33 flows into the return pipe 4, thereby preventing the alkaline solution from occupying the space of the exhaust gas channel 33 and affecting the flow of exhaust gas along the exhaust gas channel 33 and the volume of exhaust gas contained in the exhaust gas channel 33. The outlet end of the return pipe 4 is connected to the alkaline solution container 1, so that the alkaline solution in the return pipe 4 flows back into the alkaline solution container 1 for resupply to the nozzle 21, realizing the recovery and reuse of alkaline solution and reducing the amount of alkaline solution used.

[0029] Preferably, the bottom surface of the exhaust gas passage 33 is lower than the air inlet 31 and the air outlet 32, and the inlet end of the return pipe 4 is lower than the air inlet 31 and the air outlet 32, so as to prevent the alkaline solution accumulated at the bottom of the exhaust gas passage 33 from being discharged through the air outlet 32, and to prevent the exhaust gas in the exhaust gas passage 33 from entering the return pipe 4.

[0030] Preferably, a valve is provided at the inlet end of the return pipe 4. The valve opens when alkaline solution accumulates at the bottom of the exhaust gas passage 33 to allow the alkaline solution to enter the return pipe 4. The valve closes when all the alkaline solution at the bottom of the exhaust gas passage 33 is discharged into the return pipe 4 or when the amount of alkaline solution at the bottom of the exhaust gas passage 33 is small, so as to prevent the exhaust gas from entering the return pipe 4.

[0031] In some embodiments, the exhaust gas deacidification device further includes an alkaline pump 5 and a supply pipe 6. The alkaline pump 5 is connected between the alkaline container 1 and the inlet end of the supply pipe 6 to supply the alkaline solution in the alkaline container 1 to the supply pipe 6. The outlet end of the supply pipe 6 is connected to the nozzle 21.

[0032] like Figure 1 As shown, the alkali pump 5 can be installed in the alkali container 1, or it can be connected to the alkali container 1 through a pipe, preferably through a pipe. The inlet end of the supply pipe 6 is connected to the alkali pump 5, and the outlet end of the supply pipe 6 passes through the pipe wall of the reverse spray pipe 2 and is connected to the nozzle 21. The alkali pump 5 pumps the alkali in the alkali container 1 to the nozzle 21 through the supply pipe 6, and causes the alkali to be sprayed upward from the nozzle 21, thereby neutralizing the acid mist in the tail gas of the reverse spray pipe 2.

[0033] In some embodiments, the nozzles 21 are at least two arranged at intervals along the extension direction of the reverse nozzle 2.

[0034] like Figure 1 As shown, the reverse nozzle 2 extends vertically, and the nozzles 21 are arranged at least two intervals along the vertical direction, preferably but not limited to two.

[0035] As the exhaust gas flows along the reverse nozzle 2, it comes into contact with the alkaline solution sprayed from at least two nozzles 21, so that the acid mist in the exhaust gas is neutralized at least twice. This ensures that the exhaust gas and the alkaline solution are in full contact and that as much of the acid mist in the exhaust gas as possible is neutralized in the reverse nozzle 2, thereby improving the acid removal effect of the exhaust gas acid removal equipment.

[0036] Preferably, the outlet end of the liquid supply pipe 6 is provided with at least two outlet branches, which are correspondingly set and connected to the nozzles 21, so that the alkaline solution is supplied to the corresponding nozzles 21 for spraying. Each outlet branch is provided with a second switch valve 61, which controls the opening and closing and flow rate of the corresponding outlet branch, thereby controlling the opening and closing and flow rate of the corresponding nozzles 21. Thus, the total amount and spraying mode of the alkaline solution sprayed from the at least two nozzles 21 can be adjusted according to the acid mist content and neutralization status of the exhaust gas in the reverse nozzle 2.

[0037] In some embodiments, the exhaust gas deacidification device further includes a stirrer, and the alkali container 1 is provided with a water inlet 11 and an alkali inlet 12. The stirrer is connected to the alkali container 1 to stir the medium in the alkali container 1.

[0038] like Figure 1 As shown, the alkali container 1 is provided with a water inlet 11 and an alkali inlet 12. The water inlet 11 is used to add water into the alkali container 1, and the alkali inlet 12 is used to add alkali into the alkali container 1, so that water and alkali are mixed in the alkali container 1 to form an alkali solution.

[0039] The agitator is connected to the alkali container 1 and is used to agitate the water and alkali in the alkali container 1 so that the water and alkali can be quickly mixed to form an alkali solution. The agitator is also used to agitate the alkali solution in the alkali container 1 so that the alkali solution is more balanced and to ensure the neutralization effect of the alkali solution.

[0040] In some embodiments, the stirring element is a stirring tube 7, which is connected between one of the alkali pump 5 and the supply pipe 6 and the alkali container 1. The stirring tube 7 is provided with a first switching valve 71, and the supply pipe 6 is provided with a second switching valve 61.

[0041] like Figure 1 As shown, the stirring component is a stirring tube 7. The inlet end of the stirring tube 7 is connected to one of the alkali pump 5 and the supply pipe 6, preferably but not limited to being connected to the middle of the supply pipe 6. The outlet end of the stirring tube 7 is connected to the alkali container 1.

[0042] The stirring tube 7 is equipped with a first switching valve 71, which is used to control the flow rate and opening and closing of the stirring tube 7.

[0043] The liquid supply pipe 6 is provided with a second switch valve 61, which is used to control the flow rate and opening and closing of the liquid supply pipe 6. Preferably, the outlet end of the liquid supply pipe 6 is provided with at least two outlet branches corresponding to the nozzle 21. Each outlet branch is provided with a second switch valve 61. The liquid supply pipe 6 is opened when at least one second switch valve 61 is opened, and the liquid supply pipe 6 is closed when all second switch valves 61 are closed.

[0044] The first switching valve 71 and the second switching valve 61 allow the medium pumped by the alkali pump 5 from the alkali container 1 to be simultaneously supplied to the stirring pipe 7 and the supply pipe 6, or only to the supply pipe 6, or only to the stirring pipe 7. The medium supplied to the supply pipe 6 is sprayed out by the nozzle 21, and the medium supplied to the stirring pipe 7 is sprayed into the alkali container 1. The water and alkali in the alkali container 1 are stirred by the impact of the medium to form alkali solution. At the same time, the upstream section of the alkali container 1, the alkali pump 5, and the supply pipe 6 located upstream of the connection position of the stirring pipe 7, the stirring pipe 7, and the alkali container 1 form a circulation path. The water and alkali in the alkali container 1 and the formed alkali solution flow along the circulation path and are stirred.

[0045] It should be noted that when the medium in the alkali container 1 is alkali solution, the alkali solution pumped by the alkali solution pump 5 can be supplied to both the stirring pipe 7 and the liquid supply pipe 6 at the same time, or it can be supplied only to the liquid supply pipe 6, or it can be supplied only to the stirring pipe 7. When the medium in the alkali container 1 is a mixture of water and alkali that has not formed alkali solution, the mixture of water and alkali pumped by the alkali solution pump 5 is supplied only to the stirring pipe 7 for stirring.

[0046] It is understood that the stirring element is not limited to a stirring tube; in other embodiments, the stirring element is a stirring paddle disposed in an alkaline solution container.

[0047] In some embodiments, the electrostatic precipitator 3 includes a precipitator container 34, a partition 35, and a precipitator electrode 36. The bottom end of the precipitator container 34 is provided with an air inlet 31 and an air outlet 32. The partition 35 is disposed in the inner cavity of the precipitator container 34 and is spaced between the arrangement directions of the air inlet 31 and the air outlet 32. The partition 35 extends upward from the bottom surface of the inner cavity of the precipitator container 34 and is lower than the top surface of the inner cavity of the precipitator container 34, thereby forming an exhaust gas passage 33 in the inner cavity of the precipitator container 34. The precipitator electrode 36 is disposed in the exhaust gas passage 33.

[0048] like Figure 1 and Figure 2 As shown, the inner cavity of the demisting container 34 is provided with a partition 35 and a demisting electrode 36. The bottom end of the demisting container 34 is provided with an air inlet 31 and an air outlet 32 ​​communicating with the inner cavity. The air inlet 31 and the air outlet 32 ​​are arranged at intervals in the left and right direction. The partition 35 is vertically arranged and connected between the front wall and the rear wall of the inner cavity of the demisting container 34. The partition 35 is located between the air inlet 31 and the air outlet 32 ​​to separate the air inlet 31 and the air outlet 32 ​​in the left and right direction. The partition 35 extends upward from the bottom surface of the inner cavity of the demisting container 34 and is lower than the top surface of the inner cavity of the demisting container 34 so that the inner cavity of the demisting container 34 forms an exhaust gas passage 33.

[0049] After the exhaust gas enters the inner cavity of the demister container 34 through the air inlet 31, it flows upward along the exhaust gas passage 33 under the obstruction and guidance of the baffle 35, and flows to a position higher than the baffle 35. Since the exhaust gas is not obstructed by the baffle 35 at the position higher than the baffle 35, the exhaust gas can flow to the right along the exhaust gas passage 33 to the top of the exhaust outlet 32. Then the exhaust gas continues to flow downward along the exhaust gas passage 33 and is guided by the baffle 35 again. Finally, it is discharged from the demister container 34 through the exhaust outlet 32, so that the exhaust gas has a large travel distance in the exhaust gas passage 33.

[0050] The demisting electrode 36 is disposed in the exhaust gas passage 33. As the exhaust gas flows along the exhaust gas passage 33, it comes into contact with the demisting electrode 36 and the acid mist is removed by the demisting electrode 36. The demisting electrode 36 is preferably, but not limited to, an electrode wire.

[0051] In some embodiments, the inlet end of the return pipe 4 is provided with at least two inlet branches, one of which is connected to the exhaust gas passage 33 on the side of the partition 35 facing the air inlet 31, and the other inlet branch is connected to the exhaust gas passage 33 on the other side of the partition 35 facing the air outlet 32.

[0052] like Figure 1 As shown, the inlet end of the return pipe 4 is provided with two inlet branches. One inlet branch is connected to the bottom of the part of the exhaust gas passage 33 located on the left side of the partition 35 and is located below the air inlet 31. The other inlet branch is connected to the bottom of the part of the exhaust gas passage 33 located on the right side of the partition 35 and is located below the air outlet 32. Both inlet branches are provided with valves.

[0053] Since the partition 35 separates the left and right sides of the exhaust gas passage 33, two inlet branches are provided to connect the left and right sides of the exhaust gas passage 33 respectively, so as to discharge the alkaline solution in the left and right sides of the exhaust gas passage 33 and return it to the alkaline solution container 1. Since the alkaline solution level in the left and right sides of the exhaust gas passage 33 may differ, a valve is provided in each inlet branch to control the opening and closing of the corresponding inlet branch.

[0054] It is understood that the inlet end of the reflux pipe is not limited to having at least two inlet branches. In other embodiments, the bottom of the baffle is provided with a channel to connect the left and right portions of the exhaust gas passage and to allow the passage of alkali solution.

[0055] In some embodiments, the demisting electrode 36 is arranged laterally in the inner cavity of the demisting container 34 and is located above the air inlet 31 and the air outlet 32. The baffle 35 passes through the demisting electrode 36, and the top of the baffle 35 is not lower than the demisting electrode 36.

[0056] like Figure 1 and Figure 2 As shown, the demisting electrode 36 is arranged laterally in the inner cavity of the demisting container 34. In other words, the demisting electrode 36 is arranged in the inner cavity of the demisting container 34 in a horizontal direction.

[0057] The demisting electrode 36 is located above the air inlet 31 and the air outlet 32.

[0058] The baffle 35 extends from bottom to top and passes through the demisting electrode 36, such that a portion of the demisting electrode 36 is located on the left side of the baffle 35 and above the air inlet 31, and another portion of the demisting electrode 36 is located on the right side of the baffle 35 and above the air outlet 32.

[0059] The top of the partition 35 is not lower than the demisting electrode 36. In other words, the top of the partition 35 is higher than the demisting electrode 36 or flush with the top of the demisting electrode 36.

[0060] After entering the exhaust gas passage 33 through the inlet 31, the exhaust gas first flows upward and passes through the left side of the demister electrode 36 for the first time. It then reaches the top of the demister electrode 36 and the baffle 35 and moves to the right, before flowing downward and passing through the right side of the demister electrode 36 for the second time. Finally, it reaches the outlet 32 ​​and is discharged from the demister container 34. Therefore, the exhaust gas passes through the demister electrode 36 twice and is demisted twice during its flow along the exhaust gas passage 33, resulting in a good demisting effect and improving the acid removal efficiency of the exhaust gas acid removal equipment.

[0061] Preferably, the inner cavity of the demisting container 34 is provided with horizontally arranged mounting brackets 311. Two mounting brackets 311 are arranged at intervals along the vertical direction. The demisting electrode 36 is connected between the two mounting brackets 311 to mount the demisting electrode 36 in the inner cavity of the demisting container 34. A partition 35 passes through the lower mounting bracket 311, and the top end of the partition 35 is preferably, but not limited to, connected to the upper mounting bracket 311 to ensure the stability of the partition 35.

[0062] Furthermore, the demisting electrodes 36 can also be arranged at least two at intervals in the vertical direction. The top of the uppermost demisting electrode 36 is preferably, but not limited to, flush with the top of the partition 35, and the remaining demisting electrodes 36 are lower than the top of the partition 35, so that the exhaust gas passes through the demisting electrodes 36 multiple times and is demisted during the flow of exhaust gas through the exhaust gas passage 33.

[0063] In some embodiments, the electrostatic precipitator 3 further includes a distribution plate 37, which has a plurality of through holes 371 for exhaust gas to pass through. The distribution plate 37 is arranged laterally in the inner cavity of the precipitator container 34 and is located above the air inlet 31 and the air outlet 32. A baffle 35 passes through the distribution plate 37, and the top of the baffle 35 is not lower than the distribution plate 37.

[0064] like Figure 2 and Figure 4 As shown, the distribution plate 37 is arranged horizontally in the inner cavity of the demister container 34. In other words, the distribution plate 37 is arranged horizontally in the inner cavity of the demister container 34.

[0065] The distribution plate 37 is located above the air inlet 31 and the air outlet 32.

[0066] The baffle 35 extends from bottom to top and passes through the distribution plate 37, such that a portion of the distribution plate 37 is located on the left side of the baffle 35 and above the air inlet 31, and another portion of the distribution plate 37 is located on the right side of the baffle 35 and above the air outlet 32.

[0067] The distribution plate 37 is provided with a plurality of through holes 371 for exhaust gas to pass through. The through holes 371 penetrate the distribution plate 37 in a vertical direction. The plurality of through holes 371 are preferably, but not limited to, evenly distributed on the distribution plate 37. The portion of the distribution plate 37 located on the left side of the partition plate 35 and the other portion located on the right side of the partition plate 35 are both provided with through holes 371.

[0068] The top of the partition 35 is not lower than the distribution plate 37. Preferably, there are two distribution plates 37 in the vertical direction. The upper distribution plate 37 is lower than or flush with the top of the partition 35, and the lower distribution plate 37 is lower than the top of the partition 35.

[0069] The defogging electrode 36 is located between two distribution plates 37. The upper distribution plate 37 is preferably, but not limited to, substantially flush with the top of the defogging electrode 36. More preferably, the top of both the upper distribution plate 37 and the top of the defogging electrode 36 are connected to the bottom of the upper mounting bracket 311. The lower distribution plate 37 is preferably, but not limited to, located below the defogging electrode 36.

[0070] The through-hole 371 of the distribution plate 37 allows exhaust gas to pass vertically, ensuring that the exhaust gas is evenly distributed horizontally and flows vertically. Specifically, after entering the exhaust gas channel 33 through the inlet 31, the exhaust gas first flows upward and passes through the left side portions of the two distribution plates 37 in sequence, ensuring that the exhaust gas is evenly distributed horizontally and flows upward. Then, it reaches the top of the partition 35 and moves to the right, then flows downward and passes through the right side portions of the two distribution plates 37 in sequence, ensuring that the exhaust gas is evenly distributed horizontally and flows downward. Finally, it reaches the outlet 32 ​​and is discharged from the demisting container 34. The even horizontal distribution of the exhaust gas facilitates sufficient and uniform contact between the exhaust gas and the demisting electrode 36, resulting in a good demisting effect. It also ensures smooth exhaust gas flow and avoids the formation of flow dead zones or slow flow zones.

[0071] Furthermore, such as Figure 4 As shown, the air inlet 31 and air outlet 32 ​​are located at the bottom of the front end of the demister container 34. The through holes 371 are arranged in multiple groups at intervals along the front-to-back direction, preferably but not limited to seven groups. Each group includes multiple through holes 371 arranged at intervals along the left-to-right direction. The diameter of the through holes 371 in the front end is smaller than the diameter of the remaining through holes 371 in the rear end. Preferably, the diameter of the seven through holes 371 in the front end is smaller than the diameter of the four through holes 371 in the rear end. This facilitates a uniform distribution of exhaust gas in the front-to-back direction.

[0072] In some embodiments, the electrostatic precipitator 3 further includes a hot air blower 38 and a cleaning device 39, both of which are located on the top of the precipitator container 34 and communicate with the inner cavity of the precipitator container 34.

[0073] like Figure 2and Figure 3 As shown, the top of the demisting container 34 is equipped with a hot air blower 38 and a cleaning device 39. Both the hot air blower 38 and the cleaning device 39 are connected to the inner cavity of the demisting container 34. When cleaning and maintenance are required inside the demisting container 34, the electrostatic precipitator 3 is first stopped from electrostatic precipitating and receiving exhaust gas. The cleaning device 39 supplies cleaning liquid into the inner cavity of the demisting container 34 for rinsing. Then, the hot air blower 38 supplies hot air into the inner cavity of the demisting container 34 for drying, thereby cleaning and maintaining the demisting container 34.

[0074] Preferably, the bottom of the cleaning device 39 is provided with a spray assembly located inside the demisting container 34, so as to spray the cleaning liquid into the demisting container 34, thereby making the cleaning liquid evenly distributed in the horizontal direction and falling down for cleaning, thus improving the cleaning effect.

[0075] Preferably, multiple cleaning devices 39 are provided, and the multiple cleaning devices 39 are evenly distributed in the lateral direction of the demisting container 34 or arranged at intervals in the circumferential direction of the demisting container 34, so that the cleaning liquid is evenly distributed in the horizontal direction and falls to clean, thereby improving the cleaning effect.

[0076] Preferably, when the demisting container 34 is being cleaned and maintained, the valve of the return pipe 4 is closed to prevent sewage from entering the alkali container 1 through the return pipe 4. The bottom of the demisting container 34 is provided with a drain port that communicates with the inner cavity. The drain port can be opened and closed to discharge the sewage generated during cleaning through the open drain port, and then it is dried.

[0077] In some embodiments, such as Figure 5 As shown, the partition 35 is provided with reinforcing ribs 351 that extend laterally and longitudinally to enhance the strength of the partition 35.

[0078] In some embodiments, the electrostatic precipitator 3 further includes a support frame 310, a precipitator container 34 is disposed on the support frame 310, and the bottom of the precipitator container 34 is suspended so that the precipitator container 34 can be connected to the return pipe 4.

[0079] In some embodiments, the reverse nozzle 2 is preferably, but not limited to, connected to a sulfuric acid production unit to obtain the tail gas from the sulfuric acid production unit.

[0080] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0081] Furthermore, the terms "first" and "second" are used only for distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0082] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0083] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0084] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0085] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A tail gas acid removal device, characterized in that, include: The device comprises an alkaline container (1), a reverse spray pipe (2), and an electrostatic precipitator (3). The reverse spray pipe (2) is connected to the air inlet (31) of the electrostatic precipitator (3) and is used to supply exhaust gas to the electrostatic precipitator (3). The reverse spray pipe (2) is provided with a nozzle (21) inside. The spraying direction of the nozzle (21) is opposite to the exhaust gas flow direction inside the reverse spray pipe (2). The alkaline container (1) is connected to the nozzle (21) to supply alkaline solution to the nozzle (21). One end of the electrostatic precipitator (3) is provided with the air inlet (31) and the air outlet (32). The electrostatic precipitator (3) is provided with an exhaust gas passage (33) connecting the air inlet (31) and the air outlet (32). The exhaust gas passage (33) extends from the air inlet (31) to the other end of the electrostatic precipitator (3) and then extends to the air outlet (32).

2. The tail gas acid removal equipment according to claim 1, characterized in that, It also includes a return pipe (4), the inlet end of which is located at the electrostatic precipitator (3) and connected to the bottom of the exhaust gas channel (33), and the outlet end of which is connected to the alkaline container (1).

3. The tail gas acid removal equipment according to claim 1, characterized in that, It also includes an alkali pump (5) and a supply pipe (6). The alkali pump (5) is connected between the alkali container (1) and the inlet end of the supply pipe (6) to supply the alkali in the alkali container (1) to the supply pipe (6). The outlet end of the supply pipe (6) is connected to the nozzle (21).

4. The tail gas acid removal equipment according to claim 3, characterized in that, It also includes a stirring component. The alkali container (1) is provided with a water inlet (11) and an alkali inlet (12). The stirring component is connected to the alkali container (1) to stir the medium in the alkali container (1).

5. The tail gas acid removal equipment according to claim 4, characterized in that, The stirring component is a stirring tube (7), which is connected between the alkali pump (5) and the supply pipe (6) and the alkali container (1). The stirring tube (7) is provided with a first switching valve (71), and the supply pipe (6) is provided with a second switching valve (61).

6. The tail gas acid removal equipment according to claim 1, characterized in that, The nozzles (21) are at least two arranged at intervals along the extension direction of the reverse nozzle (2).

7. The tail gas acid removal equipment according to claim 1, characterized in that, The electrostatic precipitator (3) includes a precipitator container (34), a partition (35), and a precipitator electrode (36). The bottom end of the precipitator container (34) is provided with an air inlet (31) and an air outlet (32). The partition (35) is disposed in the inner cavity of the precipitator container (34) and is spaced between the arrangement directions of the air inlet (31) and the air outlet (32). The partition (35) extends upward from the bottom surface of the inner cavity of the precipitator container (34) and is lower than the top surface of the inner cavity of the precipitator container (34), thereby forming the exhaust gas passage (33) in the inner cavity of the precipitator container (34). The precipitator electrode (36) is disposed in the exhaust gas passage (33).

8. The tail gas acid removal equipment according to claim 7, characterized in that, The demisting electrode (36) is horizontally disposed in the inner cavity of the demisting container (34) and located above the air inlet (31) and the air outlet (32). The partition (35) passes through the demisting electrode (36), and the top of the partition (35) is not lower than the demisting electrode (36).

9. The tail gas acid removal equipment according to claim 7, characterized in that, The electrostatic precipitator (3) further includes a distribution plate (37), which has a plurality of through holes (371) for exhaust gas to pass through. The distribution plate (37) is arranged laterally in the inner cavity of the precipitator (34) and is located above the air inlet (31) and the air outlet (32). The partition plate (35) passes through the distribution plate (37), and the top of the partition plate (35) is not lower than the distribution plate (37).

10. The tail gas deacidification equipment according to claim 7, characterized in that, The electrostatic demister (3) also includes a hot air blower (38) and a cleaning device (39). The hot air blower (38) and the cleaning device (39) are both located on the top of the demister container (34) and communicate with the inner cavity of the demister container (34).

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