A sludge return denitrification device in sewage treatment
By designing a sludge reflux and nitrogen removal device in sewage treatment, using denitrifying bacteria and bionitrification, combined with the design of guide, feed and spray components, the full mixing and re-treatment of sludge and sewage is achieved, solving the problems of sludge accumulation and secondary pollution, and improving the effect and performance of sewage treatment.
Patent Information
- Application Number
- CN202421495269.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-27
AI Technical Summary
In existing sewage treatment, the sludge produced after nitrogen removal accumulates in the sedimentation tank, affecting the sewage discharge and treatment effect, and direct discharge is likely to cause secondary pollution.
A sludge reflux nitrogen removal device in sewage treatment is designed. The sewage is mixed with polyphosphate bacteria and nitrifying bacteria through the first and second pools, and denitrifying bacteria are used to achieve nitrogen removal by denitrifying bacteria and bionitrification. At the same time, through the guide component, the feed component and the spraying component, the sludge is introduced into the extension tube, fully mixed with the sewage, and the up and down movement of the spraying component is driven through the lifting mechanism to ensure that the sludge and sewage are fully mixed and treated again.
Through reflow treatment, the reaction completeness and effect of sewage treatment is improved, sludge accumulation is reduced, secondary pollution is avoided, and the overall performance of sewage treatment is improved.
Smart Images
Figure CN222744161U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewage treatment, in particular to a sludge reflow denitrification device in sewage treatment. Background Art
[0002] Wastewater treatment is the process of purifying wastewater to meet the water quality requirements for discharge into a water body or reuse. Wastewater treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical care, and catering, and is increasingly entering the daily lives of ordinary people. Wastewater denitrification is an important step in wastewater treatment.
[0003] The sludge produced after the existing sewage denitrification will accumulate in the sedimentation tank. The sludge mixed with the denitrified sewage will remain in the sedimentation tank, which not only affects the discharge of sewage, but also the denitrification effect of the sewage trapped in the sludge is poor. Direct discharge of the sludge is likely to cause secondary pollution and affect the sewage treatment effect. Utility Model Content
[0004] The purpose of the utility model is to provide a sludge reflow denitrification device in sewage treatment to solve the problems raised in the above background technology.
[0005] The technical solution of the utility model is: a sludge reflow denitrification device in sewage treatment, comprising a first tank body, a second tank body, a third tank body and a fourth tank body, a liquid pumping assembly is installed between the first tank body, the second tank body, the third tank body and the fourth tank body, a filter screen is fixed to the top of the fourth tank body, a material guide platform is fixed to the bottom of the fourth tank body, a V-shaped material guide slope is arranged on the material guide platform, an extension pipe is fixed to the outside of the fourth tank body, a material guide assembly located inside the bottom end of the material guide slope and used for sludge discharge is fixed in the extension pipe, a feeding assembly connected to the side wall of the extension pipe is fixed to the outside of the second tank body, the discharge end of the feeding assembly extends into the second tank body and is slidably sleeved and connected to a spray assembly, and a lifting mechanism connected to the spray assembly is fixed to one side of the top of the second tank body.
[0006] The effects achieved by the above components are as follows: the introduced sewage can be mixed with polyphosphate bacteria and nitrifying bacteria through the first tank body and the second tank body, and the nitrate brought in by the internal reflux can be converted into nitrogen gas through biological denitrification by the denitrifying bacteria and escape into the atmosphere, thereby achieving the purpose of denitrification. In the third tank body, the nitrifying bacteria convert the ammonia nitrogen and organic nitrogen in the inflowing sewage into ammonia nitrogen through biological nitrification, and the polyphosphate bacteria in the third tank body absorb excessive phosphorus. The sludge generated in the above process is sucked into the fourth tank body by the liquid pumping component, and the filter net can perform solid-liquid separation. Part of the sludge is accumulated on the guide slope of the guide table. The guide component guides the sludge into the extension pipe, and cooperates with the feed conveying component to mix the sewage and sludge and output it to the spraying component. The spraying component can be driven up and down by the lifting mechanism, so that the sludge and sewage returned to the second tank body are fully mixed with the polyphosphate bacteria and nitrifying bacteria again, further improving the completeness of the reaction and the sewage treatment effect.
[0007] Preferably, the material guide assembly includes a driving motor fixed on the outer end face of the extension tube, the output shaft of the driving motor passes through the inner wall of the end side of the extension tube and is fixed with a rotating shaft extending into the fourth tank body, the rotating shaft is fixed with a spiral blade that fits with the inner wall of the bottom end of the material guide slope, and the rotating shaft is fixed with staggered stirring blades at one end close to the driving motor.
[0008] The effects achieved by the above components are: the driving motor can drive the spiral blades and the stirring blades on the rotating shaft to rotate, the spiral blades guide the sludge in the fourth tank body into the extension pipe during the rotation, and the stirring blades can break up the sludge and fully mix it with the sewage during the rotation, so as to facilitate the sludge and sewage in the second tank body to be returned to mix with polyphosphate bacteria and nitrifying bacteria.
[0009] Preferably, the feed assembly includes a feed pump fixed on the outside of the second tank body, a feed guide pipe is connected between the feed end of the feed pump and the extension pipe, a feed pipe extending into the second tank body is fixed to the discharge end of the feed pump, and the discharge port of the feed pipe is slidably connected to the spray assembly.
[0010] The effect achieved by the above components is: the feed pump can cooperate with the guide pipe to output the sludge and sewage in the extension pipe to the spraying component at the bottom of the feed pipe, thereby achieving the purpose of reflux transportation of sewage and sludge.
[0011] Preferably, the spraying assembly includes a lifting tube slidably inserted in the feed pipe, a transverse tube is fixed to the bottom end of the lifting tube, symmetrical side tubes are fixed at both ends of the transverse tube, and multiple groups of pipe heads with different spraying directions are arranged on adjacent side walls of the two side tubes, and the bottom end of the lifting tube is connected to the bottom end of the lifting mechanism.
[0012] The effects achieved by the above components are: the returned sludge and sewage can be diverted into the side pipes at both ends through the lifting pipe, and the pipe head sprays the returned sludge and sewage at different places in the second tank body, and cooperates with the driving action of the lifting mechanism to make it fully mixed with polyphosphate bacteria and nitrifying bacteria.
[0013] Preferably, the lifting mechanism includes a guide ring fixed on the inner wall of the top end of the second tank body, a rack is slidably inserted in the guide ring, a connecting plate connected to the lifting tube is fixed to the bottom end of the rack, a lifting motor is fixed to one side of the top end of the second tank body, and the output shaft of the lifting motor is fixed to a driving gear in the rack.
[0014] The effect achieved by the above components is: the lifting motor can drive the driving gear to rotate, and then drive the rack to move up and down along the guide ring, so as to achieve the driving purpose of the spraying assembly's up and down spraying work.
[0015] The utility model provides a sludge reflow denitrification device in sewage treatment through improvement, which has the following improvements and advantages compared with the prior art:
[0016] The utility model guides the sludge into the extension pipe through the material guide component, cooperates with the material delivery component to mix the sewage and sludge and outputs it to the spraying component, and cooperates with the lifting mechanism to drive the spraying component to move up and down, so that the sludge and sewage returned to the second tank body are fully mixed with the polyphosphate bacteria and nitrifying bacteria again, further improving the reaction completeness and sewage treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:
[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0019] Figure 2 It is a three-dimensional structural schematic diagram of the lifting mechanism in the utility model;
[0020] Figure 3 It is a three-dimensional structural schematic diagram of the spraying assembly in the utility model;
[0021] Figure 4 It is a three-dimensional structural schematic diagram of the material guiding component in the utility model.
[0022] Description of reference numerals:
[0023] 1. The first tank body; 2. The second tank body; 3. The third tank body; 4. The fourth tank body; 5. The pumping assembly; 6. The filter screen; 7. The feeding assembly; 71. The feeding pump; 72. The guide pipe; 73. The feed pipe; 8. The extension pipe; 9. The guide assembly; 91. The driving motor; 92. The rotating shaft; 93. The spiral blade; 94. The stirring blade; 10. The spraying assembly; 101. The lifting pipe; 102. The horizontal pipe; 103. The side pipe; 104. The pipe head; 11. The lifting mechanism; 111. The guide ring; 112. The rack; 113. The lifting motor; 114. The driving gear; 115. The connecting plate; 12. The guide table. DETAILED DESCRIPTION
[0024] The utility model is described in detail below, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] The utility model provides a sludge reflow denitrification device in sewage treatment through improvement. The technical solution of the utility model is:
[0026] In the embodiment of the present utility model, Figure 1-Figure 4As shown, a sludge reflow denitrification device in sewage treatment includes a first tank body 1, a second tank body 2, a third tank body 3 and a fourth tank body 4, a liquid pumping component 5 is installed between the first tank body 1, the second tank body 2, the third tank body 3 and the fourth tank body 4, a filter screen 6 is fixed on the top of the fourth tank body 4, the introduced sewage can be mixed with polyphosphate bacteria and nitrifying bacteria through the first tank body 1 and the second tank body 2, and the nitrate brought into the internal reflow is converted into nitrogen gas into the atmosphere through biological denitrification by the denitrifying bacteria, so as to achieve the purpose of denitrification, in the third tank body 3, the nitrifying bacteria convert the ammonia nitrogen and organic nitrogen in the inflowing sewage into ammonia nitrogen through biological nitrification, and the ammonia nitrogen is excessively absorbed by the polyphosphate bacteria in the third tank body 3, the sludge generated in the above process is sucked into the fourth tank body 4 through the liquid pumping component 5, the filter screen 6 can perform solid-liquid separation, and a material guide is fixed on the bottom of the fourth tank body 4. A platform 12 is provided with a V-shaped material guiding slope, an extension pipe 8 is fixed on the outside of the fourth tank body 4, a material guiding component 9 located inside the bottom end of the material guiding slope and used for sludge discharge is fixed in the extension pipe 8, a feeding component 7 connected to the side wall of the extension pipe 8 is fixed on the outside of the second tank body 2, the discharge end of the feeding component 7 extends into the second tank body 2 and is slidably sleeved and connected with a spraying component 10, a lifting mechanism 11 connected with the spraying component 10 is fixed on one side of the top of the second tank body 2, part of the sludge is accumulated on the material guiding slope of the material guiding platform 12, the material guiding component 9 guides the sludge into the extension pipe 8, cooperates with the feeding component 7 to mix the sewage and sludge and output it to the spraying component 10, and cooperates with the lifting mechanism 11 to drive the spraying component 10 to move up and down, so that the sludge and sewage returned to the second tank body 2 are fully mixed with the polyphosphate bacteria and nitrifying bacteria again, so as to further improve the reaction completeness and sewage treatment effect.
[0027] In the embodiment of the utility model, the material guide assembly 9 includes a drive motor 91 fixed to the outer end surface of the extension tube 8, the output shaft of the drive motor 91 passes through the inner wall of the end side of the extension tube 8 and is fixed with a rotating shaft 92 extending into the fourth tank body 4, the rotating shaft 92 is fixed with a spiral blade 93 that fits the inner wall of the bottom end of the material guide slope, and the end of the rotating shaft 92 close to the drive motor 91 is fixed with a staggered stirring blade 94
[0028] The driving motor 91 can drive the spiral blade 93 and the stirring blade 94 on the rotating shaft 92 to rotate. The spiral blade 93 guides the sludge in the fourth tank body 4 into the extension pipe 8 during the rotation. The stirring blade 94 can break up the sludge and fully mix it with the sewage during the rotation, so that the sludge and sewage in the second tank body 2 can be mixed with polyphosphate bacteria and nitrifying bacteria. The feeding component 7 includes a feeding pump 71 fixed on the outside of the second tank body 2. A guide pipe 72 is connected between the feeding end of the feeding pump 71 and the extension pipe 8. A feeding pipe 73 extending into the second tank body 2 is fixed to the discharge end of the feeding pump 71. The discharge port of the feeding pipe 73 is slidably connected with the spraying component 10. The feeding pump 71 can cooperate with the guide pipe 72 to output the sludge and sewage in the extension pipe 8 to the spraying component 10 at the bottom of the feeding pipe 73, so as to achieve the purpose of reflux and transportation of sewage and sludge.
[0029] The spraying assembly 10 includes a lifting pipe 101 which is slidably inserted into the feed pipe 73. A transverse pipe 102 is fixed to the bottom end of the lifting pipe 101. Symmetrical side pipes 103 are fixed to both ends of the transverse pipe 102. A plurality of pipe heads 104 with different spraying directions are arranged on adjacent side walls of the two side pipes 103. The bottom end of the lifting pipe 101 is connected to the bottom end of the lifting mechanism 11. The return sludge and sewage can be diverted and introduced into the side pipes 103 at both ends through the lifting pipe 101. The pipe heads 104 spray the return sludge and sewage to different places in the second tank body 2, and cooperate with the driving action of the lifting mechanism 11 to fully mix them with polyphosphate bacteria and nitrifying bacteria.
[0030] The lifting mechanism 11 includes a guide ring 111 fixed on the inner wall of the top end of the second pool body 2, a rack 112 is slidably inserted in the guide ring 111, a connecting plate 115 connected to the lifting tube 101 is fixed to the bottom end of the rack 112, a lifting motor 113 is fixed to one side of the top end of the second pool body 2, and the output shaft of the lifting motor 113 is fixed to a driving gear 114 in the rack 112. The lifting motor 113 can drive the driving gear 114 to rotate, thereby driving the rack 112 to move up and down along the guide ring 111, thereby achieving the driving purpose of the up and down spraying operation of the spray assembly 10.
[0031] The utility model provides a sludge reflow denitrification device for sewage treatment, and its working principle is as follows: the introduced sewage can be mixed with polyphosphate bacteria and nitrifying bacteria through the first tank body 1 and the second tank body 2, and the nitrate brought in by the internal reflow is converted into nitrogen gas into the atmosphere through biological denitrification by the denitrifying bacteria, so as to achieve the purpose of denitrification. In the third tank body 3, the nitrifying bacteria convert the ammonia nitrogen and organic nitrogen in the inflowing sewage into ammonia nitrogen through biological nitrification, and the polyphosphate bacteria in the third tank body 3 absorb phosphorus in excess. The sludge generated in the above process is sucked into the fourth tank body 4 through the liquid pumping component 5, and the filter screen 6 can perform solid-liquid separation. Part of the sludge is accumulated on the guide slope of the guide table 12, and the driving motor 91 can drive the spiral blade 93 and the stirring blade 94 on the rotating shaft 92 to rotate. The spiral blade During the rotation, the blade 93 guides the sludge in the fourth tank body 4 into the extension pipe 8. The stirring blade 94 can break up the sludge and fully mix it with the sewage during the rotation, so that the sludge and sewage returned to the second tank body 2 can be mixed with polyphosphate-accumulating bacteria and nitrifying bacteria. The material pump 71 can cooperate with the guide pipe 72 to output the sludge and sewage in the extension pipe 8 to the spraying assembly 10 at the bottom of the feed pipe 73. The lifting motor 113 can drive the driving gear 114 to rotate, and then drive the rack 112 to move up and down along the guide ring 111, so as to achieve the driving purpose of the up and down spraying work of the spraying assembly 10. The lifting pipe 101 diverts the returned sludge and sewage into the side pipes 103 at both ends, and the pipe head 104 sprays the returned sludge and sewage at different places in the second tank body 2, and cooperates with the driving action of the lifting mechanism 11 to make it fully mixed with polyphosphate-accumulating bacteria and nitrifying bacteria.
[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A sludge reflow denitrification device in sewage treatment, comprising a first tank body (1), a second tank body (2), a third tank body (3) and a fourth tank body (4), wherein a liquid pumping assembly (5) is installed between the first tank body (1), the second tank body (2), the third tank body (3) and the fourth tank body (4), and a filter screen (6) is fixed at the top of the fourth tank body (4), characterized in that: A material guide platform (12) is fixed at the bottom end of the fourth tank body (4), and a V-shaped material guide slope is arranged on the material guide platform (12). An extension pipe (8) is fixed on the outside of the fourth tank body (4), and a material guide component (9) located inside the bottom end of the material guide slope and used for sludge discharge is fixed inside the extension pipe (8). A material conveying component (7) connected to the side wall of the extension pipe (8) is fixed on the outside of the second tank body (2), and the discharge end of the material conveying component (7) extends into the second tank body (2) and is slidably sleeved and connected to a spraying component (10). A lifting mechanism (11) connected to the spraying component (10) is fixed on one side of the top end of the second tank body (2).
2. A sludge reflow denitrification device in sewage treatment according to claim 1, characterized in that: The material guide assembly (9) includes a drive motor (91) fixed to the outer end surface of the extension tube (8), the output shaft of the drive motor (91) passes through the inner wall of the end side of the extension tube (8) and is fixed with a rotating shaft (92) extending into the fourth tank body (4), the rotating shaft (92) is fixed with a spiral blade (93) that is in contact with the inner wall of the bottom end of the material guide slope, and the rotating shaft (92) is fixed with a staggered stirring blade (94) at one end close to the drive motor (91).
3. A sludge reflow denitrification device in sewage treatment according to claim 1, characterized in that: The feed assembly (7) comprises a feed pump (71) fixed on the outside of the second tank body (2); a feed guide pipe (72) is connected between the feed end of the feed pump (71) and the extension pipe (8); a feed pipe (73) extending into the second tank body (2) is fixed to the discharge end of the feed pump (71); and the discharge port of the feed pipe (73) is slidably connected to the spray assembly (10).
4. A sludge reflow denitrification device in sewage treatment according to claim 3, characterized in that: The spraying assembly (10) comprises a lifting pipe (101) which is slidably inserted into the feeding pipe (73); a transverse pipe (102) is fixed to the bottom end of the lifting pipe (101); symmetrical side pipes (103) are fixed to both ends of the transverse pipe (102); a plurality of groups of pipe heads (104) with different spraying directions are arranged on adjacent side walls of the two side pipes (103); and the bottom end of the lifting pipe (101) is connected to the bottom end of the lifting mechanism (11).
5. A sludge reflow denitrification device in sewage treatment according to claim 4, characterized in that: The lifting mechanism (11) comprises a guide ring (111) fixed on the inner wall of the top end of the second tank body (2), a rack (112) is slidably inserted in the guide ring (111), a connecting plate (115) connected to the lifting tube (101) is fixed at the bottom end of the rack (112), a lifting motor (113) is fixed on one side of the top end of the second tank body (2), and an output shaft of the lifting motor (113) is fixed to a driving gear (114) in the rack (112).