Comet filter device for sewage sulphuric acid treatment recovery

Abstract

This utility model relates to the technical field of wastewater treatment equipment, and discloses a comet-shaped filtration device for the treatment and recovery of sulfuric acid in wastewater. The device includes a housing with a comet-shaped chamber for filtering sulfuric acid-containing wastewater. An inlet communicating with the comet-shaped chamber is located at the top of the housing, and an outlet communicating with the comet-shaped chamber is located at the bottom. Inside the comet-shaped chamber, from top to bottom, are arranged a comet-shaped fiber filter media layer, an upper water distribution layer, and a lower water distribution layer. Several upper water distributors are evenly distributed along the radial direction of the comet-shaped chamber in the upper water distribution layer to draw in and filter the sulfuric acid-containing wastewater before spraying it onto the comet-shaped fiber filter media layer. Several lower water distributors are evenly distributed along the radial direction of the comet-shaped chamber in the lower water distribution layer to filter impurities in the sulfuric acid-containing wastewater. The positions of the upper and lower water distributors correspond one-to-one. This utility model improves the overall wastewater treatment efficiency while reducing plant treatment costs.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment equipment, specifically to a comet filtration device for the treatment and recovery of sulfuric acid in wastewater. Background Technology

[0002] The production of high-concentration sulfuric acid generates wastewater containing sulfate ions. Due to the presence of sulfate ions, the pH concentration of this wastewater is generally maintained at 2-3. If this sulfate-containing wastewater is not treated and is discharged for an extended period, it can easily corrode steel pipes and equipment. Furthermore, the wastewater may corrode the internal steel reinforcement of supporting structures, leading to internal loosening. Therefore, all wastewater generated during the production of high-concentration sulfuric acid is collected in a wastewater treatment plant and treated by a wastewater treatment system before reuse.

[0003] The existing wastewater treatment system equipment consists of, in sequence, a wastewater collection tank, an equalization tank, a clear water tank, a buffer tank, a secondary sedimentation tank, a primary sedimentation tank, a sludge thickening tank, a dosing pump, a lime slurry dosing pump, a lime slurry mixing pump, a lime slurry tank, and corresponding liquid transfer pumps for each tank. The wastewater treatment process is as follows: wastewater produced during the production of high-concentration sulfuric acid is transported to the wastewater collection tank. The liquid transfer pump then transports the wastewater from the collection tank to the equalization tank. Lime and water are added to the lime slurry tank according to a specific ratio. After mixing by the lime slurry mixing pump, a lime slurry with a specific gravity of 7 is produced. The lime slurry is then transported to the equalization tank by the lime slurry dosing pump to adjust the sulfate content of the wastewater in the equalization tank. Once the wastewater treatment effect is achieved, the lime slurry and the sludge produced from sulfate neutralization are sequentially transferred to the buffer tank, secondary sedimentation tank, and primary sedimentation tank for sedimentation. Finally, the purified wastewater, meeting discharge standards, is transported to the clear water tank.

[0004] While existing wastewater treatment systems can treat wastewater and ensure that the purified wastewater meets discharge standards, the overall wastewater treatment efficiency is low and the plant's treatment costs are increased because existing technologies use lime neutralization and multiple sedimentation processes to obtain the final purified wastewater. Utility Model Content

[0005] This invention aims to provide a comet-shaped filtration device for the treatment and recovery of sulfuric acid in wastewater. It can solve the technical problem that the existing technology uses lime neutralization and multiple sedimentation processes to obtain the final purified wastewater, resulting in low overall wastewater treatment efficiency and increased plant treatment costs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] 1) A comet-shaped filtration device for sulfuric acid treatment and recovery in wastewater, comprising a housing, wherein the housing has a comet-shaped chamber for filtering sulfuric acid-containing wastewater, the top of the housing is provided with an inlet communicating with the comet-shaped chamber, and the bottom of the housing is provided with an outlet communicating with the comet-shaped chamber. The comet-shaped chamber is provided with a comet-shaped fiber filter media layer, an upper water distribution layer and a lower water distribution layer in sequence from top to bottom. The upper water distribution layer has several upper water distributors evenly distributed along the radial direction of the comet-shaped chamber to draw in and filter sulfuric acid-containing wastewater and then spray it onto the comet-shaped fiber filter media layer in a spray pattern. The lower water distribution layer has several lower water distributors evenly distributed along the radial direction of the comet-shaped chamber for filtering impurities in the sulfuric acid-containing wastewater. The positions of the upper water distributors and the lower water distributors correspond one-to-one.

[0008] This invention introduces sulfuric acid-containing wastewater from existing sewage treatment processes into a comet-shaped chamber via an inlet. Since the comet chamber consists of a comet-shaped fiber filter media layer, an upper water distribution layer, and a lower water distribution layer arranged sequentially from top to bottom, the sulfuric acid-containing wastewater first comes into contact with the comet-shaped fiber filter media layer. Because existing comet-shaped fiber filter media is an asymmetrical fiber filter media, with one end being a loose bundle of fibers called the "comet tail" and the other end being a relatively heavy and large solid body, the fiber bundle is melted and fixed inside, called the "comet nucleus." This overall comet-shaped structure gives the comet-shaped fiber filter layer gaps that decrease in size along the direction of wastewater flow, forming an inverted pyramid structure. This allows for deep filtration of sulfuric acid-containing wastewater from existing sewage treatment processes, increasing the interception capacity of the comet-shaped fiber filter layer.

[0009] After being deeply filtered through a comet-shaped fiber filter media layer, the sulfuric acid-containing wastewater is concentrated in the upper water distribution layer. Several upper water distributors in this layer pump the wastewater from this location, filter it, and then spray it back into the comet-shaped fiber filter media layer in a shower-like manner. This causes the wastewater, after being filtered by the upper water distributors, to re-enter the comet-shaped fiber filter media layer for deep filtration. This process is repeated, with some of the sulfuric acid-containing wastewater passing through the comet-shaped fiber filter media layer and several upper water distributors before entering the lower water distribution layer. Several lower water distributors within the lower water distribution layer will perform wastewater impurity removal filtration on the sulfuric acid-containing wastewater that has been filtered through the comet-shaped fiber filter media layer and several upper water distributors. This achieves repeated deep filtration of sulfuric acid-containing wastewater for reuse, eliminating the lime neutralization process in existing technologies. This avoids the complicated lime neutralization and multiple sedimentation processes in existing wastewater treatment technologies, reducing the number of processes, improving the efficiency of sulfuric acid-containing wastewater treatment, and lowering the plant's treatment costs.

[0010] 2) The comet-shaped filtration device for sulfuric acid treatment and recovery in wastewater as described in 1), wherein:

[0011] Between the upper and lower water distribution layers is a support plate extending radially along the comet chamber. The support plate is fixed to the shell along its circumferential outer side. The upper surface of the support plate is fixedly connected to all the upper water distributors, and the lower surface of the support plate is fixedly connected to all the lower water distributors. The upper and lower water distributors are connected by a connecting pipe.

[0012] In this invention, a support plate separates the upper and lower water distribution layers, so that the upper water distribution layer faces the comet-shaped fiber filter media layer. This ensures that the upper water distribution layer sprays the filtered wastewater into the comet-shaped fiber filter media layer in a shower-like manner for further deep filtration. The deep-filtered wastewater is introduced into the lower water distribution device by the upper water distributor. The lower water distributor removes impurities from the filtered wastewater and then discharges the filtered wastewater through the outlet.

[0013] 3) The comet-shaped filtration device for sulfuric acid treatment and recovery in wastewater as described in 1), wherein:

[0014] The upper water distributor includes a cylindrical upper water distribution shell made of high-hardness engineering plastic. The upper water distribution shell has a filter chamber inside. The top of the upper water distribution shell has a spray hole communicating with the filter chamber. The bottom of the upper water distribution shell has a water pump communicating with the filter chamber. The filter chamber has several filter screens evenly distributed along its height direction, and plastic filler is filled between adjacent filter screens.

[0015] In this invention, a water pump draws wastewater, after deep filtration through a comet-shaped fiber filter media layer, into a filtration chamber. Several filter screens are evenly distributed along the height of the filter chamber. These screens can uniformly arrange the plastic filler within the filtration chamber. Because the plastic filler has a large surface area and a porous structure, it can effectively trap impurities while increasing the filtration area, preventing them from passing through the filter medium, thereby improving filtration efficiency.

[0016] Meanwhile, plastic fillers possess excellent chemical and physical stability. Therefore, when treating wastewater containing sulfuric acid, they will not be dissolved or corroded by the sulfuric acid impurities in the wastewater. Furthermore, plastic fillers are relatively inexpensive, thus reducing the cost of wastewater treatment in the plant. Additionally, since filter screens increase the resistance to wastewater flow, evenly distributing plastic fillers in a filter screen manner allows wastewater to remain within the plastic fillers for filtration. Simultaneously, the filter screen itself removes impurities; therefore, combining it with plastic fillers improves the filtration effect. The filtered wastewater is then sprayed through nozzles onto the comet-shaped fiber filter media layer for further filtration.

[0017] 4) The comet-shaped filtration device for sulfuric acid treatment and recovery in wastewater as described in 1), wherein:

[0018] The lower water distributor includes a cylindrical lower water distribution shell made of high-hardness engineering plastic. The lower water distribution shell is connected to the upper water distribution shell through a connecting pipe. The lower water distribution shell contains comet fiber filter media for removing impurities from sewage.

[0019] This invention involves filling the upper water distribution shell with sewage, which is then transported to the lower water distribution shell via a connecting pipe. Since the lower water distribution shell is made of high-hardness engineering plastic, it has a certain amount of porosity. When the sewage passes through the pores of the high-hardness engineering plastic, it undergoes impurity removal and filtration. At the same time, combined with the comet fiber filter media inside the lower water distribution shell, the sewage undergoes further impurity removal and filtration, thus improving the filtration effect.

[0020] 5) The comet-shaped filtration device for sulfuric acid treatment and recovery in wastewater as described in 1), wherein:

[0021] The surface of the shell is provided with a manhole communicating with the comet chamber, and the surface of the shell is provided with a sight glass corresponding to the manhole. The manhole in this utility model can be used in conjunction with fire extinguishers and mechanical breathing valves in the prior art, which can play a role in safety protection, and also facilitate maintenance and cleaning; while the sight glass is used to observe the sewage treatment in the comet chamber inside the shell, and can also observe the usage status of the comet-type fiber filter layer, the upper water distributor and the lower water distributor. If any damage is found, the comet-type fiber filter layer, the upper water distributor and the lower water distributor can be replaced in time, so that the device of this utility model can be used normally.

[0022] 6) The comet filtration device for sulfuric acid treatment and recovery in wastewater as described in 1), wherein:

[0023] The bottom of the housing has downward-extending legs, the tops of which are welded and fixed to the bottom of the housing.

[0024] This invention uses legs to support the shell, thereby supporting the filtration of sewage inside the comet chamber; the top of the legs is welded and fixed to the bottom of the shell, which can maintain the stability of the shell.

[0025] 7) The comet-shaped filtration device for sulfuric acid treatment and recovery in wastewater as described in 1), wherein:

[0026] The side of the shell, near the outlet, has a discharge port that communicates with the comet chamber. The position of the discharge port corresponds to the position of the comet-shaped fiber filter media layer. The discharge port, outlet, and inlet are each equipped with a valve.

[0027] This invention places the discharge port on the side of the shell and connects it to the comet chamber, so that the sludge after sewage filtration can be discharged through the discharge port. At the same time, the position of the discharge port corresponds to the position of the comet-shaped fiber filter layer, so that the sludge formed after filtration by the comet-shaped fiber filter layer can be discharged.

[0028] Compared with the prior art, this utility model also has the following technical effects:

[0029] Compared to existing technologies, this invention introduces sulfuric acid-containing wastewater into a comet-shaped chamber via an inlet. The comet-shaped fiber filter media layer, upper water distribution layer, and lower water distribution layer, arranged sequentially from top to bottom along the height direction within the chamber, allow for multiple and repeated filtration of the sulfuric acid-containing wastewater. This eliminates the need for lime neutralization in existing technologies. By combining the comet-shaped fiber filter media layer, several upper water distributors, and several lower water distributors, the sulfuric acid-containing wastewater can be repeatedly and deeply filtered for reuse. This avoids the complex lime neutralization and multiple sedimentation processes required in existing wastewater treatment technologies, reducing the number of steps, increasing the efficiency of sulfuric acid-containing wastewater treatment, and simultaneously lowering factory treatment costs. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the comet filtration device for sulfuric acid treatment and recovery in wastewater according to the present invention;

[0031] Figure 2 for Figure 1 Sectional view of AA;

[0032] Figure 3 for Figure 2 A magnified view of a section at point B1. Detailed Implementation

[0033] The following detailed description illustrates the specific implementation method:

[0034] The reference numerals in the accompanying drawings include: housing 1, support leg 2, water inlet 3, water outlet 4, discharge port 5, sight glass 6, manhole 7, comet-shaped fiber filter layer 8, upper water distributor 9, upper water distributor housing 91, water pump 92, support plate 10, lower water distributor 11, and connecting pipe 12.

[0035] See the example. Figure 1 and Figure 2As shown, the comet filtration device for sulfuric acid treatment and recovery in this embodiment includes a housing 1, which has a comet chamber for filtering sulfuric acid-containing wastewater. The bottom of the housing 1 has a downwardly extending support leg 2, and the top of the support leg 2 is welded and fixed to the bottom of the housing 1. In this embodiment, the support leg 2 is used to support the housing 1, so as to support the filtration of wastewater in the comet chamber. The top of the support leg 2 is welded and fixed to the bottom of the housing 1 to maintain the stability of the housing 1.

[0036] The top of the shell 1 is provided with an inlet 3 communicating with the comet chamber, and the bottom of the shell 1 is provided with an outlet 4 communicating with the comet chamber. On the side of the shell 1 near the outlet 4, there is a discharge port 5 communicating with the comet chamber. The position of the discharge port 5 corresponds to the position of the comet-type fiber filter media layer 8. The discharge port 5, the outlet 4 and the inlet 3 are each equipped with a valve. In this embodiment, the discharge port 5 is set on the side of the shell 1 and communicates with the comet chamber, so that the discharge port 5 can discharge the sludge after the sewage is filtered. At the same time, the position of the discharge port 5 corresponds to the position of the comet-type fiber filter media layer 8, so that the sludge formed after the comet-type fiber filter media layer 8 is filtered can be discharged.

[0037] In this embodiment, the surface of the housing 1 is provided with a manhole 7 communicating with the comet chamber, and the surface of the housing 1 is provided with a sight glass 6 corresponding to the manhole 7. The manhole 7 in this embodiment can be used in conjunction with fire extinguishers and mechanical breathing valves in the prior art, which can play a role in safety protection. In addition, it can also facilitate maintenance and cleaning. The sight glass 6 is used to observe the sewage treatment in the comet chamber inside the housing 1, and can also observe the usage status of the comet-type fiber filter layer 8, the upper water distributor 9, and the lower water distributor 11. If any damage is found, the comet-type fiber filter layer 8, the upper water distributor 9, and the lower water distributor 11 can be replaced in time, so that the device in this embodiment can be used normally.

[0038] See Figure 2 As shown, in this embodiment, the comet chamber is provided with a comet-shaped fiber filter media layer 8, an upper water distribution layer and a lower water distribution layer from top to bottom. Several upper water distributors 9 are evenly distributed along the radial direction of the comet chamber in the upper water distribution layer. After the sulfuric acid wastewater is drawn in and filtered, it is sprayed into the comet-shaped fiber filter media layer 8 in a spray-like manner. Several lower water distributors 11 are evenly distributed along the radial direction of the comet chamber in the lower water distribution layer. The positions of the upper water distributors 9 and the lower water distributors 11 correspond one-to-one.

[0039] Therefore, in this embodiment, the sulfuric acid-containing wastewater from the original wastewater treatment is introduced into the comet chamber through the inlet 3. Since the comet chamber is arranged from top to bottom as a comet-shaped fiber filter media layer 8, an upper water distribution layer, and a lower water distribution layer, the sulfuric acid-containing wastewater from the original wastewater treatment first comes into contact with the comet-shaped fiber filter media layer 8. Because the comet fiber filter media in the prior art is an asymmetric fiber filter media, one end of the comet fiber filter media is a loose fiber bundle, called the "comet tail", and the other end is a relatively heavy and large solid body, which melts and fixes the fiber bundle inside, called the "comet nucleus". The overall comet-shaped structural feature makes the comet-shaped fiber filter layer have gaps from large to small in the direction of wastewater flow, forming an inverted pyramid structure, which can deeply filter the sulfuric acid-containing wastewater from the original wastewater treatment and increase the interception capacity of the comet-shaped fiber filter layer.

[0040] After the sulfuric acid-containing wastewater undergoes deep filtration through the comet-shaped fiber filter media layer 8, it concentrates in the upper water distribution layer. Several upper water distributors 9 in this layer pump the wastewater, which, after filtration, is sprayed back into the comet-shaped fiber filter media layer 8 in a shower-like manner. This causes the wastewater, filtered by the upper water distributors 9, to re-enter the comet-shaped fiber filter media layer 8 for further filtration. This process is repeated, with some of the wastewater passing through the comet-shaped fiber filter media layer 8 and several upper water distributors 9 before entering the lower water distribution layer. Several lower water distributors 11 within the lower water distribution layer will perform wastewater impurity removal filtration on the sulfuric acid-containing wastewater that has been filtered by the comet-shaped fiber filter media layer 8 and several upper water distributors 9. This achieves repeated deep filtration of sulfuric acid-containing wastewater for reuse, eliminating the lime neutralization process in existing technologies. This avoids the complicated lime neutralization and multiple sedimentation processes in existing wastewater treatment technologies, reducing the number of processes, improving the efficiency of sulfuric acid-containing wastewater treatment, and lowering the plant's treatment costs.

[0041] In addition, in this embodiment, there is a support plate 10 extending radially along the comet chamber between the upper water distribution layer and the lower water distribution layer. The support plate 10 is fixed to the outer side of the shell 1 along its circumferential direction. The upper surface of the support plate 10 is fixedly connected to all the upper water distributors 9, and the lower surface of the support plate 10 is fixedly connected to all the lower water distributors 11. The upper water distributors 9 and the lower water distributors 11 are connected by a connecting pipe 12.

[0042] In this embodiment, the upper water distribution layer and the lower water distribution layer are separated by the support plate 10, so that the upper water distribution layer faces the comet-shaped fiber filter media layer 8 to ensure that the upper water distribution layer sprays the filtered sewage into the comet-shaped fiber filter media layer 8 for further deep filtration. The deep-filtered sewage is introduced into the lower water distribution device 11 by the upper water distributor 9. The lower water distributor 11 removes impurities from the filtered sewage and then discharges the filtered sewage through the outlet 4.

[0043] See Figure 3 As shown, in this embodiment, the upper water distributor 9 includes a cylindrical upper water distribution shell 91, which is made of high-hardness engineering plastic. The upper water distribution shell 91 has a filter chamber inside, and the top of the upper water distribution shell 91 has a spray hole communicating with the filter chamber. The bottom of the upper water distribution shell 91 has a water pump 92 communicating with the filter chamber. The filter chamber has several filter screens evenly distributed along its height direction, and plastic filler is filled between adjacent filter screens.

[0044] In this embodiment, a water pump 92 draws the wastewater, after deep filtration through the comet-shaped fiber filter media layer 8, into the filter chamber. Several filter screens are evenly distributed along the height of the filter chamber. The filter screens can evenly arrange the plastic packing material in the filter chamber. Since the plastic packing material has a large surface area and porous structure, it can effectively trap impurities while increasing the filtration area, preventing them from passing through the filter medium, thereby improving the filtration efficiency.

[0045] Meanwhile, plastic fillers have good chemical and physical stability. Therefore, when treating wastewater containing sulfuric acid, they will not be dissolved or corroded by the sulfuric acid impurities in the wastewater. In addition, the cost of plastic fillers is relatively low, thereby reducing the cost of wastewater treatment in the plant. Furthermore, since the filter screen increases the resistance to wastewater flow, the uniform distribution of plastic fillers in the form of a filter screen allows the wastewater to remain within the plastic fillers for filtration. At the same time, the filter screen itself has the function of removing impurities. Therefore, combining it with plastic fillers can improve the filtration effect. The filtered wastewater is then sprayed through the spray holes onto the comet-shaped fiber filter media layer 8 for further filtration.

[0046] The lower water distributor 11 includes a cylindrical lower water distribution shell 1, which is made of high-hardness engineering plastic. The lower water distribution shell 1 is connected to the upper water distribution shell 91 through a connecting pipe 12. The lower water distribution shell 1 contains comet fiber filter media for removing impurities from sewage.

[0047] In this embodiment, after sewage is filled into the upper water distribution shell 91, it is transported to the lower water distribution shell 1 through the connecting pipe 12. Since the lower water distribution shell 1 is made of high-hardness engineering plastic, it has a certain amount of pores. When the sewage passes through the pores of the high-hardness engineering plastic, it is filtered to remove impurities. At the same time, combined with the comet fiber filter material in the lower water distribution shell 1, the sewage is filtered to remove impurities again, thereby improving the filtration effect.

[0048] Compared to existing technologies, this embodiment introduces sulfuric acid-containing wastewater into the comet chamber through inlet 3. Because the comet-shaped fiber filter media layer 8, upper water distribution layer, and lower water distribution layer are sequentially arranged from top to bottom along the height direction within the comet chamber, the sulfuric acid-containing wastewater is filtered multiple times and repeatedly. This eliminates the need for the lime neutralization process in existing technologies. By combining the comet-shaped fiber filter media layer 8, several upper water distributors 9, and several lower water distributors 11, the sulfuric acid-containing wastewater can be repeatedly and deeply filtered for reuse. This avoids the complex lime neutralization and multiple sedimentation processes required in existing wastewater treatment technologies, reducing the number of processes, improving the efficiency of sulfuric acid-containing wastewater treatment, and lowering plant treatment costs.

[0049] The above are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A comet filter device for sewage sulphuric acid treatment recovery, characterized in that, The device includes a shell containing a comet-shaped chamber for filtering sulfuric acid-containing wastewater. The top of the shell has an inlet communicating with the comet-shaped chamber, and the bottom of the shell has an outlet communicating with the comet-shaped chamber. The comet-shaped chamber contains, from top to bottom, a comet-shaped fiber filter media layer, an upper water distribution layer, and a lower water distribution layer. The upper water distribution layer contains several upper water distributors evenly distributed along the radial direction of the comet-shaped chamber, which draw in and filter the sulfuric acid-containing wastewater before spraying it onto the comet-shaped fiber filter media layer in a spray-like manner. The lower water distribution layer contains several lower water distributors evenly distributed along the radial direction of the comet-shaped chamber, used for filtering impurities in the sulfuric acid-containing wastewater. The positions of the upper and lower water distributors correspond one-to-one.

2. The comet filter for sewage sulphuric acid treatment recovery according to claim 1, characterized by: Between the upper and lower water distribution layers is a support plate extending radially along the comet chamber. The support plate is fixed to the shell along its circumferential outer side. The upper surface of the support plate is fixedly connected to all the upper water distributors, and the lower surface of the support plate is fixedly connected to all the lower water distributors. The upper and lower water distributors are connected by a connecting pipe.

3. The comet filter for sewage sulphuric acid treatment recovery according to claim 1, characterized by: The upper water distributor includes a cylindrical upper water distribution shell made of high-hardness engineering plastic. The upper water distribution shell has a filter chamber inside. The top of the upper water distribution shell has a spray hole communicating with the filter chamber. The bottom of the upper water distribution shell has a water pump communicating with the filter chamber. The filter chamber has several filter screens evenly distributed along its height direction, and plastic filler is filled between adjacent filter screens.

4. The comet filter for sewage sulphuric acid treatment recovery according to claim 1, characterized by: The lower water distributor includes a cylindrical lower water distribution shell made of high-hardness engineering plastic. The lower water distribution shell is connected to the upper water distribution shell through a connecting pipe. The lower water distribution shell contains comet fiber filter media for removing impurities from sewage.

5. The comet-shaped filtration device for sulfuric acid treatment and recovery in wastewater according to claim 1, characterized in that: The surface of the shell is provided with a manhole that communicates with the comet chamber, and the surface of the shell is provided with a viewing mirror corresponding to the manhole.

6. The comet filter for sewage sulphuric acid treatment recovery according to claim 1, characterized by: The bottom of the housing has downward-extending legs, the tops of which are welded and fixed to the bottom of the housing.

7. The comet filter for sewage sulphuric acid treatment recovery according to claim 1, characterized by: The side of the shell, near the outlet, has a discharge port that communicates with the comet chamber. The position of the discharge port corresponds to the position of the comet-shaped fiber filter media layer. The discharge port, outlet, and inlet are each equipped with a valve.

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