Nitrogen and phosphorus removal device for sewage treatment

Abstract

The utility model discloses a nitrogen and phosphorus removal device for sewage treatment, and relates to the field of sewage treatment. A nitrogen and phosphorus removal device for sewage treatment comprises a conveying water pipe and further comprises a second rotating shaft rotationally connected to the position, close to a water outlet, in the conveying water pipe; the blade plates are fixedly connected to the second rotating shaft circumferentially at equal intervals; the carbon source storage box is arranged at a position, close to the second rotating shaft, above the conveying water pipe; a cylindrical cavity is formed in the shell, the shell is fixedly connected to the lower end of the carbon source storage box, feeding and discharging ports are symmetrically formed in the upper end and the lower end of the shell, and the feeding and discharging ports of the shell are communicated with a discharging port of the carbon source storage box and a feeding port of the conveying water pipe respectively; when sewage is conveyed into the anaerobic tank, the anoxic tank and the aerobic tank, the rotating column can be driven to rotate under the action of sewage flow, so that a carbon source in the carbon source storage tank can be automatically added into the sewage, manual operation is not needed, and the automation degree of the device is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and specifically relates to a sewage treatment denitrification and dephosphorization device. Background Art

[0002] Urban sewage refers to the domestic sewage of urban residents, drainage from government agencies, schools, hospitals, commercial service agencies and various public facilities, as well as industrial wastewater and initial rainwater that are allowed to be discharged into the urban sewage collection system. Since sewage is rich in nitrogen, phosphorus and other elements, direct discharge can easily lead to eutrophication and other problems in the water body. Therefore, certain nitrogen removal and phosphorus removal treatments are required before sewage is discharged. The most common sewage treatment method is biological method, which uses the metabolic action of microorganisms in the wastewater to decompose excess nitrogen and phosphorus in the sewage.

[0003] Biological denitrification and phosphorus removal is a technology developed for the purpose of high-efficiency simultaneous denitrification and phosphorus removal. This process has good denitrification and phosphorus removal effects, such as Figure 1 The process flow chart of simultaneous nitrogen removal and phosphorus removal A2 / O is shown as follows: in the aerobic section, nitrifying bacteria convert the ammonia nitrogen and organic nitrogen in the influent sewage into ammonia nitrogen through biological nitrification, and convert it into nitrate; in the anoxic section, denitrifying bacteria convert the nitrate brought in by the internal reflow into nitrogen gas through biological denitrification, which escapes into the atmosphere, thereby achieving the purpose of nitrogen removal; in the anaerobic section, polyphosphate bacteria release phosphorus and absorb easily degradable organic matter such as low-grade fats; and in the aerobic section, polyphosphate bacteria absorb phosphorus in excess and remove the phosphorus through the discharge of residual sludge to make the sewage meet the discharge standards.

[0004] In order to ensure better growth of microbial cells (strains) and maintain a good arc shape, carbon sources are generally added to the treatment pool regularly to provide nutrients for the microbial cells. However, in the prior art, when adding carbon sources to the treatment pool, manual addition is mostly adopted, which has a low degree of automation and high labor costs. In view of this, the present utility model is specially proposed. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a sewage treatment denitrification and dephosphorization device which can overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: a sewage treatment denitrification and dephosphorization device, including a conveying water pipe, and also including: a second rotating shaft, rotatably connected to a position near the water outlet in the conveying water pipe; a blade, fixedly connected to the second rotating shaft at equidistant intervals around the circumference; a carbon source storage box, arranged at a position above the conveying water pipe near the second rotating shaft; a shell with a cylindrical cavity inside, fixedly connected to the lower end of the carbon source storage box, and inlet and outlet ports are symmetrically provided at the upper and lower ends of the shell, and the inlet and outlet ports of the shell are respectively connected to the outlet of the carbon source storage box and the feed port of the conveying water pipe; a rotating column, rotatably connected to the cylindrical cavity of the shell through a third rotating shaft, and a material trough is symmetrically provided on the rotating column; the second rotating shaft passes through one end of the conveying water pipe and is installed with a first gear, and the third rotating shaft passes through one end of the shell and is installed with a second gear meshing with the first gear, and the diameter of the second gear is larger than the diameter of the first gear.

[0007] In order to facilitate adjustment of the transmission ratio of the first gear and the second gear as needed, further, the second shaft and the third shaft are both threadedly connected with nuts, and the first gear and the second gear are detachably connected to the second shaft and the third shaft respectively through the nuts.

[0008] In order to avoid clogging of the filter and facilitate cleaning of debris, a filter is obliquely arranged at a position of the water delivery pipe near the water inlet, a slag storage barrel is connected to a position of the filter at the lower end of the water delivery pipe near the filter, and a barrel cover is installed at the open end of the lower end of the slag storage barrel.

[0009] In order to increase the slag storage capacity of the slag storage barrel, further, the slag storage barrel is rotatably connected with two mutually meshing crushing tooth rollers through the first rotating shaft, one end of the first rotating shaft close to the second gear passes through the slag storage barrel and is fixedly connected to a driven pulley, and the second gear is fixedly connected to a driving pulley on the side close to the nut, the driving pulley is sleeved on the third rotating shaft, the driving pulley and the driven pulley are connected by a belt, the ends of the two first rotating shafts away from the driven pulleys both pass through the slag storage barrel and are fixedly connected to a transmission gear, and the two transmission gears are meshed with each other.

[0010] In order to facilitate the rapid disassembly and assembly of the barrel cover, further, the barrel cover and the slag storage barrel are detachably connected via threads, and the barrel cover and the slag storage barrel are sealed via a sealing ring.

[0011] In order to facilitate the diversion of the carbon source, further, diversion blocks are symmetrically fixedly connected on both sides of the discharge port in the carbon source storage box.

[0012] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the utility model uses the second rotating shaft, the blade, the first gear, the second gear, the third rotating shaft, the rotating column, the shell and other components in coordination. When conveying sewage into the anaerobic tank, the anoxic tank and the aerobic tank, the rotating column can be driven to rotate under the action of the sewage flow, so that the carbon source in the carbon source storage box can be automatically added to the sewage without manual operation, which effectively improves the automation degree of the device. At the same time, without adding a stirring component, the carbon source and the sewage can be fully mixed, so that the microbial cells can better absorb the carbon source and supplement nutrients. Moreover, by making the diameter of the second gear larger than the diameter of the first gear, when the first gear rotates rapidly, the second gear can be rotated more slowly under the action of the transmission ratio, thereby controlling the speed of carbon source feeding and avoiding excessive addition of carbon source.

[0013] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In the attached picture:

[0015] Figure 1 This is the process flow chart of simultaneous nitrogen removal and phosphorus removal A2 / O;

[0016] Figure 2 It is a front view schematic diagram of the utility model;

[0017] Figure 3 It is a rear view schematic diagram of the utility model;

[0018] Figure 4 For this utility model Figure 2 A schematic cross-sectional structure diagram of ;

[0019] Figure 5 It is a structural schematic diagram of the second rotating shaft, the first gear and the nut in the utility model.

[0020] In the figure: 1. water delivery pipe; 101. filter screen; 102. slag storage barrel; 103. first rotating shaft; 104. crushing gear roller; 105. transmission gear; 106. barrel cover; 2. second rotating shaft; 201. blade; 202. first gear; 3. carbon source storage box; 301. guide block; 302. shell; 303. rotating column; 304. third rotating shaft; 305. second gear; 4. nut. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0022] Embodiment 1:

[0023] Reference Figure 1-Figure 5 A sewage treatment denitrification and dephosphorization device comprises a water delivery pipe 1, and further comprises: a second rotating shaft 2, rotatably connected to a position near a water outlet in the water delivery pipe 1; blades 201, fixedly connected to the second rotating shaft 2 at equidistant intervals around the circumference; a carbon source storage box 3, arranged above the water delivery pipe 1 and near the second rotating shaft 2; a shell 302 with a cylindrical cavity formed therein, fixedly connected to the lower end of the carbon source storage box 3, and inlet and outlet ports are symmetrically formed at the upper and lower ends of the shell 302, and the inlet and outlet ports of the shell 302 are respectively The discharge port of the carbon source storage box 3 and the feed port of the water delivery pipe 1 are connected; the rotating column 303 is rotatably connected in the cylindrical cavity of the shell 302 through the third rotating shaft 304, and the rotating column 303 is symmetrically provided with a material containing trough; the second rotating shaft 2 passes through one end of the water delivery pipe 1 and is installed with a first gear 202, and the third rotating shaft 304 passes through one end of the shell 302 and is installed with a second gear 305 meshing with the first gear 202, and the diameter of the second gear 305 is greater than the diameter of the first gear 202.

[0024] When installing the sewage treatment device, a water delivery pipe 1 can be connected between the water inlet of the anaerobic tank and the anaerobic tank, the anoxic tank, and the aerobic tank. In the process of denitrification and dephosphorization of the sewage, when the sewage is transported to the anaerobic tank through the water delivery pipe 1, or the sewage is transported from the anaerobic tank to the anoxic tank, and the anoxic tank to the aerobic tank, the flowing sewage will impact the blade 201 with water flow, and then the blade 201 will drive the first gear 202 to rotate through the second rotating shaft 2 under the impact of the water flow, and the first gear 202 will drive the third rotating shaft 304 to rotate through the second gear 305, and the third rotating shaft 304 will drive the rotating column 303 to rotate. When the material trough provided on the rotating column 303 is connected with the discharge port of the carbon source storage box 3, the carbon source will fall into the material trough. When the material trough containing the carbon source rotates to After the lower part is connected to the feed port of the water delivery pipe 1, the carbon source in the feed trough will fall into the water delivery pipe 1, and then the carbon source will enter the anaerobic tank, anoxic tank or aerobic tank together with the sewage. At the same time, when the carbon source follows the sewage into the anaerobic tank, anoxic tank or aerobic tank, the carbon source will collide with the sewage in the anaerobic tank, anoxic tank or aerobic tank, so that the carbon source can be quickly dissolved into the sewage for absorption by microbial cells, effectively ensuring the uniformity of mixing of the carbon source added to the sewage, thereby eliminating the need to add additional stirring components, and by making the diameter of the second gear 305 larger than the diameter of the first gear 202, when the first gear 202 rotates rapidly, the second gear 305 can be rotated more slowly under the action of the transmission ratio, thereby controlling the speed of carbon source feeding and avoiding excessive addition of carbon source.

[0025] Embodiment 2:

[0026] Reference Figure 1-Figure 5 , a sewage treatment denitrification and dephosphorization device, is basically the same as Example 1, and further: the second shaft 2 and the third shaft 304 are both threadedly connected with nuts 4, and the first gear 202 and the second gear 305 are respectively detachably connected to the second shaft 2 and the third shaft 304 through the nuts 4. By making the first gear 202, the second gear 305 and the second shaft 2 and the third shaft 304 detachably connected through the nuts 4, the first gear 202 and the second gear 305 of different sizes can be replaced according to needs, so as to adjust the transmission ratio of the first gear 202 and the second gear 305 as needed, thereby adjusting the amount of carbon source added as needed.

[0027] A filter screen 101 is obliquely arranged at a position of the water delivery pipe 1 near the water inlet, and a slag storage barrel 102 is connected to a position of the lower end of the water delivery pipe 1 near the filter screen 101. A barrel cover 106 is installed at the open end of the lower end of the slag storage barrel 102. By obliquely arranging the filter screen 101 on one side of the water delivery pipe 1 near the water inlet, when sewage passes through the filter screen 101, the debris intercepted by the filter screen 101 will enter the slag storage barrel 102 for storage under the guidance of the filter screen 101, which can not only reduce the solid debris in the sewage, but also avoid the filter screen 101 from being blocked. The staff only needs to open the barrel cover 106 regularly to clean up the debris.

[0028] Two mutually meshing crushing tooth rollers 104 are rotatably connected in the slag storage barrel 102 through the first rotating shaft 103, one end of the first rotating shaft 103 close to the second gear 305 passes through the slag storage barrel 102 and is fixedly connected to a driven pulley, and the second gear 305 is fixedly connected to a driving pulley on the side close to the nut 4, and the driving pulley is sleeved on the third rotating shaft 304. The driving pulley and the driven pulley are connected by a belt, and the ends of the two first rotating shafts 103 away from the driven pulleys both pass through the slag storage barrel 102 and are fixedly connected to a transmission gear 105. The transmission gears 105 mesh with each other. When the second gear 305 rotates, the second gear 305 will drive the active pulley to rotate synchronously, and the active pulley will drive the driven pulley to rotate through the belt. The driven pulley will drive the two crushing tooth rollers 104 to rotate with the cooperation of the two transmission gears 105, and then the two crushing tooth rollers 104 can crush larger debris, thereby reducing the space occupied by larger debris in the slag storage barrel 102, effectively improving the storage effect of the slag storage barrel 102, and increasing the cycle of staff cleaning the debris.

[0029] The barrel cover 106 and the slag barrel 102 are detachably connected via threads, and the barrel cover 106 and the slag barrel 102 are sealed via a sealing ring. By making the barrel cover 106 and the slag barrel 102 detachably connected via threads, and sealing the barrel cover 106 and the slag barrel 102 via a sealing ring, while ensuring the sealing between the slag barrel 102 and the barrel cover 106, it is also convenient to quickly disassemble and assemble the barrel cover 106, providing convenience for the staff to clean out impurities in the slag barrel 102.

[0030] The carbon source storage box 3 has guide blocks 301 symmetrically fixedly connected on both sides of the discharge port. The guide blocks 301 can guide the carbon source in the carbon source storage box 3, thereby facilitating the carbon source to flow out of the carbon source storage box 3 better.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention.

Claims

1. A sewage treatment denitrification and phosphorus removal device, characterized in that: It comprises a water delivery pipe (1), and also comprises: A second rotating shaft (2) is rotatably connected to a position in the water delivery pipe (1) close to the water outlet; The blades (201) are fixedly connected to the second rotating shaft (2) at equal intervals around the circumference; A carbon source storage box (3) is arranged above the water delivery pipe (1) and close to the second rotating shaft (2); A shell (302) with a cylindrical cavity inside is fixedly connected to the lower end of the carbon source storage box (3), and inlets and outlets are symmetrically provided at the upper and lower ends of the shell (302), and the inlets and outlets of the shell (302) are respectively connected to the outlet of the carbon source storage box (3) and the inlet of the water delivery pipe (1); A rotating column (303) is rotatably connected to the cylindrical cavity of the housing (302) via a third rotating shaft (304), and a material receiving trough is symmetrically provided on the rotating column (303); The second rotating shaft (2) passes through one end of the water delivery pipe (1) and is installed with a first gear (202); the third rotating shaft (304) passes through one end of the housing (302) and is installed with a second gear (305) meshing with the first gear (202); the diameter of the second gear (305) is greater than the diameter of the first gear (202).

2. A sewage treatment denitrification and dephosphorization device according to claim 1, characterized in that: The second rotating shaft (2) and the third rotating shaft (304) are both threadedly connected with nuts (4), and the first gear (202) and the second gear (305) are detachably connected to the second rotating shaft (2) and the third rotating shaft (304) respectively through the nuts (4).

3. A sewage treatment denitrification and dephosphorization device according to claim 1, characterized in that: A filter screen (101) is obliquely arranged at a position near the water inlet of the water delivery pipe (1), a position near the filter screen (101) at the lower end of the water delivery pipe (1) is connected to a slag storage cylinder (102), and a cylinder cover (106) is installed at the open end of the lower end of the slag storage cylinder (102).

4. A sewage treatment denitrification and dephosphorization device according to claim 3, characterized in that: Two mutually meshing crushing tooth rollers (104) are rotatably connected in the slag storage barrel (102) via a first rotating shaft (103), wherein one end of the first rotating shaft (103) close to the second gear (305) passes through the slag storage barrel (102) and is fixedly connected to a driven pulley, and the second gear (305) is fixedly connected to a driving pulley on a side close to the nut (4), and the driving pulley is sleeved on the third rotating shaft (304), and the driving pulley and the driven pulley are connected via a belt, and the ends of the two first rotating shafts (103) away from the driven pulleys both pass through the slag storage barrel (102) and are fixedly connected to a transmission gear (105), and the two transmission gears (105) are meshed with each other.

5. A sewage treatment denitrification and dephosphorization device according to claim 3, characterized in that: The cylinder cover (106) and the slag storage cylinder (102) are detachably connected via threads, and the cylinder cover (106) and the slag storage cylinder (102) are sealed via a sealing ring.

6. A sewage treatment denitrification and dephosphorization device according to claim 1, characterized in that: Guide blocks (301) are symmetrically and fixedly connected on both sides of the discharge port in the carbon source storage box (3).

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