Denitrification wastewater treatment system and method coupling low-temperature concentration and bioaugmentation

Abstract

The present application relates to sewage treatment technical field, especially to a kind of coupling low temperature concentration and biological strengthening's denitrification sewage treatment system, including low temperature concentration section and biological strengthening section, biological strengthening section is composed of aerobic tank and anoxic tank, three fixed plates are fixedly connected in the inner wall of aerobic tank one side, three sliding plates are arranged in the inner wall of aerobic tank other side;Also involved a kind of coupling low temperature concentration and biological strengthening's denitrification sewage treatment system's use method, by the setting of adjusting plate, straight plate, F-shaped frame and adjusting mechanism and other structures, when needing to adjust the residence time of sewage in aerobic tank, the vertical adjusting plate is quickly turned into horizontal state, and then the sewage passing between adjusting plate and fixed plate and sliding plate, will be changed from original straight flow into S-shaped flow path, to extend the treatment reaction time of sewage in aerobic tank, while increasing the side aeration of partition frame, and the original bottom aeration assembly structure in aerobic tank, more dead angle-free, improve the treatment effect of device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a denitrification sewage treatment system and method coupled with low-temperature concentration and biological reinforcement. BACKGROUND

[0002] The denitrification sewage treatment system coupled with low-temperature concentration and biological reinforcement is a new type of sewage advanced denitrification process facing low-temperature environment, integrating physical and chemical concentration means and biological denitrification reinforcement technology. The core idea is to first enrich low-concentration nitrogen (ammonia nitrogen, organic nitrogen, etc.) in raw water into a small volume of "concentrated liquid" through low-temperature side flow concentration, and then rely on the functional denitrifying bacteria group (such as anaerobic ammonia oxidation bacteria and short-cut denitrifying bacteria) to perform efficient biological denitrification on the concentrated liquid, thereby solving the pain points of low microbial activity, large reactor volume, high carbon source and energy consumption, and difficulty in meeting the total nitrogen discharge standard in low-temperature environment.

[0003] The aerobic tank undertakes the key reactions of short-cut nitrification and anaerobic ammonia oxidation. The microbial activity decreases at low temperature, and it is necessary to extend the hydraulic retention time (HRT) to ensure the complete conversion of NH4⁺-N to NO2⁻-N. In summer, when the water quality concentration is low, it is required to shorten the HRT to avoid excessive aeration, energy waste and biological membrane aging. Therefore, real-time adjustment of the residence time of the aerobic tank is the core means for the system to meet the standard and save energy.

[0004] Currently, variable frequency water pumps are generally used to reduce the flow rate, which can equivalently extend the HRT by reducing the water inflow. Conversely, it shortens the HRT. Although this method responds quickly, it has obvious drawbacks. The pump operates at a low frequency for a long time, and the efficiency point deviates from the rated value. The motor overheats and the power consumption increases. In addition, the reduction of flow rate leads to a decrease in horizontal flow rate in the tank, easy deposition of sludge, and expansion of dead zones. An underwater pusher needs to be additionally started to increase power consumption and maintenance. At the same time, the sudden change in flow rate produces hydraulic impact, and the biological membrane or granular sludge is easily sheared and broken in low-temperature period, which takes a long time to recover.

[0005] Therefore, the industry urgently needs a new technology that does not depend on variable frequency pumps, does not need to stop water and empty, and can finely adjust the HRT in a wide range, to solve the dilemma of "energy saving and stability" of low-temperature denitrification systems. SUMMARY

[0006] The purpose of the present application is to solve the problems in the background art and provide a denitrification sewage treatment system and method coupled with low-temperature concentration and biological reinforcement.

[0007] To achieve the above object, the technical scheme adopted by the present application is: a denitrification sewage treatment system coupled with low-temperature concentration and biological reinforcement, comprising a low-temperature concentration section and a biological reinforcement section, the biological reinforcement section is composed of an aerobic tank and an anoxic tank, three fixed plates are fixedly connected to one side of the inner wall of the aerobic tank, three sliding plates are arranged on the other side of the inner wall of the aerobic tank, a pair of partition frames are arranged in the middle of the aerobic tank, three adjusting plates are arranged at equal intervals on the side of the partition frames away from each other, two of the adjusting plates are arranged between the fixed plates and the sliding plates respectively, straight plates and F-shaped frames are arranged on both sides of the top end of the aerobic tank, a U-shaped expansion frame is arranged between the partition frames after being separated, a plurality of supporting plates are fixedly connected to both sides of the expansion frame, expansion plates are arranged at the bottom end of the supporting plates, circular shafts are fixedly connected to the top end of the expansion plates and the adjusting plates, the top end of the circular shafts respectively penetrates the straight plates, the F-shaped frames and the supporting plates, adjusting mechanisms for driving the rotation of the adjusting plates are further arranged, and expansion mechanisms for expansion installation in the later stage are arranged on the expansion frame.

[0008] In the above technical scheme, further, the adjusting mechanism comprises electric telescopic cylinders, the electric telescopic cylinders are arranged in pairs, the electric telescopic cylinders are fixedly connected to the top end of the straight plates and the F-shaped frames respectively, pull plates are fixedly connected to the output end of the electric telescopic cylinders, main ropes are fixedly connected to the side wall of the pull plates, pull ropes are wound on the outer wall of the circular shafts, one end of the pull ropes is fixedly connected to the outer wall of the circular shafts, the other end of the pull ropes above the adjusting plates is fixedly connected to the main ropes, and the pull ropes on the expansion plates are adhesively connected to the outer wall of the main ropes during expansion installation.

[0009] In the above technical scheme, further, the outer wall of the circular shafts is provided with volute springs, one end of the volute springs is fixed to the outer wall of the circular shafts, and the other end of the volute springs is fixedly connected to the top end of the corresponding straight plates, F-shaped frames and supporting plates.

[0010] In the above technical scheme, further, a plurality of aeration holes are arranged at equal intervals on the outer wall of the partition frames, and the partition frames are connected in communication with the external air blower through a hose.

[0011] In the above technical scheme, further, a quarter circular ring type guide groove is arranged at the position beside the circular shaft relative to the bottom end of the straight plates, the F-shaped frames and the supporting plates, a circular rod is fixedly connected to the top end of the adjusting plates and the expansion plates, and the circular rod is slidingly connected in the corresponding guide groove.

[0012] In the above technical scheme, further, the expansion mechanism comprises a pair of L-shaped grooves and straight grooves, the L-shaped grooves and the straight grooves are arranged at positions below the F-shaped frame and the straight plate respectively at the top end of the aerobic tank, the straight plate is fixedly connected with a pair of straight blocks for sliding in the straight grooves at the bottom end, the F-shaped frame is fixedly connected with a pair of circular blocks for sliding in the L-shaped grooves at the bottom end, the top end of the straight plate is provided with a pair of upper bolts, the upper bolts are threadedly connected in the corresponding threaded grooves, the top end of the F-shaped frame is provided with a pair of lower bolts, and the bottom end of the lower bolts is threadedly connected in the threaded grooves in the L-shaped grooves through the circular blocks, and the top end of the expansion frame is provided with a pair of expansion bolts.

[0013] In the above technical scheme, further, the plurality of expansion plates are divided into two groups, each group of the expansion plates is arranged at a side close to the partition frame, and the positions of the expansion plates in the two groups are staggered, the top end of the straight plate is rotatably connected with an upper guide roller at a position beside one group of the expansion plates, and the top end of the F-shaped frame is rotatably connected with a lower guide roller at a position beside the other group of the expansion plates.

[0014] In the above technical scheme, further, the top end of the aerobic tank is provided with a sliding groove at a position beside the sliding plate, a moving plate is slidably connected in the sliding groove, the side wall of the moving plate is fixedly connected with the side wall of the sliding plate, the top end of the moving plate is provided with a pair of insertion grooves, the side wall of the F-shaped frame is fixedly connected with an insertion rod at a position beside the insertion grooves, a pushing spring is fixedly connected between the inner side of the sliding groove and the side wall of the moving plate, and the partition frame is fixedly connected at the bottom of the corresponding straight plate and F-shaped frame.

[0015] In the above technical scheme, further, a water inlet joint is fixedly connected at the bottom end of one side of the aerobic tank, a U-shaped water outlet pipe is fixedly connected at the top end of the other side of the aerobic tank, and valves are arranged at both ends of the U-shaped water outlet pipe.

[0016] A use method of a denitrification sewage treatment system coupled with low-temperature concentration and biological strengthening, comprising the following steps:

[0017] Step one: adjusting the residence time, first controlling the adjusting mechanism to drive a plurality of circular shafts to rotate, thereby driving the adjusting plate to flip, and flipping the adjusting plate from a vertical state to a horizontal state, so as to hinder the residence treatment time of the sewage in the aerobic tank;

[0018] Step two: expansion installation, first remove the straight plate and F-shaped frame limit, then push the straight plate and F-shaped frame according to the expansion path, then install the expansion frame and expansion plate between the straight plate and F-shaped frame, and connect the wiring of the adjusting mechanism, that is, the rapid expansion is completed.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] 1、The present application can quickly turn the vertical adjusting plate into a horizontal state when the residence time of sewage in the aerobic tank needs to be adjusted, and the sewage passing between the adjusting plate, the fixed plate and the sliding plate will change from the original straight flow to an S-shaped flow path, thereby prolonging the treatment reaction time of the sewage in the aerobic tank and increasing the side aeration of the partition frame.

[0021] 2、The present application can quickly separate the straight plate and the F-shaped frame when the residence time of sewage in the aerobic tank cannot meet the existing demand, and then install the expansion frame between the straight plate and the F-shaped frame to increase a channel and thereby increase the treatment residence time of the sewage, and the expansion plate can be installed on the original adjusting mechanism without the need to increase new electrical equipment, greatly improving the convenience of the device. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall appearance structure of the denitrification sewage treatment system of the present application;

[0023] Figure 2 is a schematic diagram of the three-dimensional structure of the aerobic tank of the present application;

[0024] Figure 3 is a schematic diagram of the three-dimensional structure of the partition frame, adjusting plate and sliding plate of the present application; Figure 2 is a schematic diagram of the local enlarged structure of A in the present application;

[0025] Figure 4 is a schematic diagram of the three-dimensional structure of the aerobic tank after expansion of the present application;

[0026] Figure 5 is a schematic diagram of the three-dimensional structure of the partition frame, adjusting plate and sliding plate of the present application;

[0027] Figure 6 is a schematic diagram of the three-dimensional structure of the aerobic tank of the present application;

[0028] Figure 7 is a schematic diagram of the three-dimensional structure of the straight plate of the present application;

[0029] Figure 8Schematic diagram of partial perspective structure of the adjusting plate, main rope and round shaft of the application;

[0030] Figure 9 Schematic diagram of overall appearance structure of the adjusting plate, straight plate and partition frame of the application.

[0031] In the figure: 1, low-temperature concentration section; 2, biological strengthening section; 3, aerobic tank; 4, anoxic tank; 5, fixed plate; 6, sliding plate; 7, partition frame; 8, aeration hole; 9, adjusting plate; 10, straight plate; 11, F-shaped frame; 12, expansion frame; 13, hose; 14, branch plate; 15, expansion plate; 16, round shaft; 17, electric telescopic cylinder; 18, pull plate; 19, main rope; 20, pull rope; 21, volute spring; 22, guide groove; 23, round rod; 24, L-shaped groove; 25, straight groove; 26, straight block; 27, round block; 28, upper bolt; 29, lower bolt; 30, expansion bolt; 31, upper guide roller; 32, lower guide roller; 33, sliding groove; 34, moving plate; 35, insertion groove; 36, insertion rod; 37, pushing spring; 38, water inlet joint; 39, U-shaped water outlet pipe; 40, valve. DETAILED DESCRIPTION

[0032] In order to enable the above-mentioned objects, features and advantages of the present application to be more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0033] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application, however, the present application can also be implemented in other manners different from those described herein, and therefore, the present application is not limited to the specific embodiments disclosed below.

[0034] In actual use, it is found that the current engineering generally adopts the variable frequency water inlet pump flow reduction method, and reducing the water inlet amount can equivalently extend the HRT, and vice versa. Although this method responds quickly, it has obvious disadvantages. The pump operates at a low frequency for a long time, the efficiency point deviates from the rated value, the motor overheats, the power consumption increases, and the reduced flow leads to a decrease in the horizontal flow velocity in the tank, easy deposition of sludge, expansion of the dead zone, and the need to additionally open an underwater pusher, which increases power consumption and maintenance, and the hydraulic impact caused by the flow mutation easily shears and breaks the biofilm or granular sludge in the low-temperature period, and the recovery period is long. The following structure is invented to solve the above problems.

[0035] As Figures 1-9The illustrated coupling low-temperature concentration and biological strengthening denitrification sewage treatment system comprises a low-temperature concentration section 1 and a biological strengthening section 2, the biological strengthening section 2 is composed of an aerobic tank 3 and an anoxic tank 4, the low-temperature concentration section 1 is a "nitrogen concentrator" of the system, and the original water is converted into clear water for reuse by 90% of volume under the condition of ≤40℃ by vacuum membrane distillation, freezing concentration or low-pressure evaporation, while the total nitrogen is concentrated by 8-10 times, the subsequent tank capacity is reduced, and the biological reaction rate in winter is improved, the biological strengthening section is composed of the aerobic tank 3 and the anoxic tank 4, the sewage is first subjected to denitrification in the anoxic tank 4, and then flows into the aerobic tank 3 to realize short-cut nitrification and biological phosphorus absorption, the effluent from the two tanks relies on gravity overflow and directly enters a subsequent membrane bioreactor (MBR) unit, and mud-water separation is completed under the action of the microfiltration membrane to ensure that the effluent SS is ≤5 mg·L⁻¹ and further intercept COD and bacteria, and the MBR water production can be discharged or reused up to the standard, and it needs to be noted that the bottom of the aerobic tank 3 is provided with an aeration assembly for treating sewage, which is a mature technology in the prior art, and will not be described in detail here;

[0036] The inner wall of the aerobic tank 3 is fixedly connected with three fixed plates 5 on one side, the inner wall of the aerobic tank 3 is provided with three sliding plates 6 on the other side, a pair of partition frames 7 is arranged in the middle of the aerobic tank 3, three adjusting plates 9 are equidistantly arranged on the side away from the partition frame 7, two of the adjusting plates 9 are arranged between the fixed plate 5 and the sliding plate 6, respectively, straight plates 10 and F-shaped frames 11 are arranged on both sides of the top end of the aerobic tank 3, a U-shaped expansion frame 12 is arranged between the partition frames 7 after being separated, a plurality of supporting plates 14 are fixedly connected to both sides of the expansion frame 12, expansion plates 15 are arranged at the bottom ends of the supporting plates 14, circular shafts 16 are fixedly connected to the top ends of the expansion plates 15 and the adjusting plates 9, the top ends of the circular shafts 16 penetrate through the top ends of the straight plates 10, the F-shaped frames 11 and the supporting plates 14, respectively, and an adjusting mechanism for driving the rotation of the plurality of adjusting plates 9 is further arranged, and an expansion mechanism for expansion installation in the later stage is arranged on the expansion frame 12;

[0037] The adjusting mechanism comprises electric telescopic cylinders 17, the electric telescopic cylinders 17 are arranged in pairs, the electric telescopic cylinders 17 are fixedly connected to the top ends of the straight plates 10 and the F-shaped frames 11, respectively, pull plates 18 are fixedly connected to the output ends of the electric telescopic cylinders 17, main ropes 19 are fixedly connected to the side walls of the pull plates 18, pull ropes 20 are wound on the outer walls of the circular shafts 16, one ends of the pull ropes 20 are fixedly connected to the outer walls of the circular shafts 16, the other ends of the pull ropes 20 above the adjusting plates 9 are fixedly connected to the main ropes 19, and the pull ropes 20 on the expansion plates 15 are adhesively connected to the outer walls of the main ropes 19 during expansion installation;

[0038] The outer wall of the circular shaft 16 is provided with a volute spring 21, one end of the volute spring 21 is fixed on the outer wall of the circular shaft 16, the other end of the volute spring 21 is fixedly connected to the top end of the corresponding straight plate 10, F-shaped frame 11 and support plate 14, through the setting of the volute spring 21, when the electric telescopic cylinder 17 resets and releases the pulling of the pull rope 20, the circular shaft 16 can be reset through the elastic force of the volute spring 21;

[0039] And the outer wall of the partition frame 7 is provided with a plurality of aeration holes 8 at equal intervals, the partition frame 7 is connected in communication between the external air blower through the hose 13, through the hose 13 connection, it can also be expanded in the subsequent, without hindering the normal sliding of the partition frame 7, affecting the rapid expansion of the device, by increasing the side aeration of the partition frame 7, and the original bottom aeration assembly structure in the aerobic tank 3, more dead angle, improve the treatment effect of the device, it needs to be explained here that the aeration hole 8 on the partition frame 7 is a "only aeration, not water" micropore, the aperture is small, the opening direction is 45° to the side down, the instantaneous air pressure is 3-5kPa, the orifice air speed is >15m·s⁻¹, a continuous airflow film is formed, the water surface tension cannot be broken, the check valve is automatically closed when the aeration stops, the water pressure is <2kPa, which is not enough to open, and then the sewage cannot directly pass through the aeration hole 8;

[0040] When treating sewage, the constant pressure air generated by the air blower is sent into the hollow partition frame 7 through the hose 13 and sprayed out at high speed from the aeration hole 8, forming micro-bubbles, the micro-bubbles continuously break on the surface of the partition frame 7, generating a local shear force of 20-40Pa, which just peels off the aged biofilm, maintains the film thickness of 50-150μm (optimal activity interval), avoids the substrate mass transfer blocked caused by "film too thick", and at the same time, the bubble rising forms a slight disturbance to the filler / carrier, so that the SNAD bacteria and anaerobic ammonia oxidation bacteria are alternately exposed to a micro-oxygen to anoxic environment, completing short-cut nitrification, anaerobic ammonia oxidation and endogenous denitrification in one step;

[0041] The bottom end of the straight plate 10, F-shaped frame 11 and support plate 14 is provided with a quarter circular guide groove 22 relative to the side of the circular shaft 16, the top end of the adjusting plate 9 and the expansion plate 15 is fixedly connected with a circular rod 23, and the circular rod 23 is slidingly connected in the corresponding guide groove 22, through the setting of the guide groove 22 and the circular rod 23, the turning angle of the adjusting plate 9 and the expansion plate 15 can be limited, ensuring that the adjusting plate 9 and the expansion plate 15 can be installed and turned in a specified path, improving the stability of the device during operation;

[0042] The bottom end of one side of the aerobic tank 3 is fixedly connected with a water inlet joint 38, the top end of the other side of the aerobic tank 3 is fixedly connected with a U-shaped water outlet pipe 39, and the two ends of the U-shaped water outlet pipe 39 are provided with valves 40, through the setting of the valves 40, it is convenient for subsequent expansion to change the water outlet position and quickly switch;

[0043] When the nitrogen-containing sewage is treated, the sewage treated by the low-temperature concentration section 1 enters the biological strengthening section 2, and first added to the anoxic tank 4 for denitrification, and then flows into the aerobic tank 3 to realize short-cut nitrification and biological phosphorus removal. In this process, the sewage from the water inlet joint 38 flows between the partitions 7, and then passes through the S-shaped channel composed of the fixed plate 5 and the adjusting plate 9 (at this time, the adjusting plate 9 is in a horizontal state, so the path of the channel is long, and thus the time of the sewage near the aeration holes 8 and the aeration assembly is increased), and then the sewage flows out of the channel composed of the fixed plate 5 and the adjusting plate 9, and then passes through the gap between the partitions 7 and the aerobic tank 3, and flows into the S-shaped channel composed of the sliding plate 6 and the adjusting plate 9, and is subjected to aeration treatment, and finally flows to one end of the U-shaped outlet pipe 39 and is discharged.

[0044] When it is necessary to increase the treatment time of the sewage in the aerobic tank 3, the electric telescopic cylinder 17 can be controlled to drive the pull plate 18 to move, thereby driving the main rope 19 to move. In this process, since the pull ropes 20 on the circular shaft 16 are fixed to the main rope 19, the movement of the main rope 19 drives the pull ropes 20 to move together. Since the other end of the pull rope 20 is fixed to the circular shaft 16, the pull rope 20 is pulled to drive the circular shaft 16 to rotate, thereby driving the plurality of adjusting plates 9 to rotate, so that the adjusting plates 9 are flipped from the horizontal state to the vertical state (the state is described from the perspective of the top view of the aerobic tank 3). In this process, since one end of the spiral spring 21 is fixed to the circular shaft 16, and the other end is fixed to the straight plate 10 and the F-shaped frame 11, when the circular shaft 16 rotates, the spiral spring 21 is driven to rotate and compress, and at the same time, the circular rod 23 is driven to move in the guide groove 22, thereby completing the rapid adjustment.

[0045] The sewage entering the aerobic tank 3 will directly pass between the fixed plate 5 and the partition 7 without being hindered by the adjusting plate 9, and the original S-shaped flow path is changed to a straight flow path, thereby shortening the flow time of the sewage in the aerobic tank 3, thereby realizing the rapid adjustment of the device.

[0046] In summary, through the design of the above structure, when it is necessary to adjust the residence time of the sewage in the aerobic tank 3, the vertical adjusting plate 9 can be quickly flipped to the horizontal state, and the sewage passing between the adjusting plate 9 and the fixed plate 5 and the sliding plate 6 will be changed from the original straight flow to an S-shaped flow path, thereby prolonging the treatment reaction time of the sewage in the aerobic tank 3, and increasing the side aeration of the partition 7, and the original bottom aeration assembly structure in the aerobic tank 3 is more dead angle-free, thereby improving the treatment effect of the device.

[0047] On the basis of the above embodiment, it is found that the above structure can flexibly adjust the residence time of sewage in the aerobic tank according to the actual situation, but the number of blocking channels is fixed. If the existing channel blocking time cannot meet the use demand, expansion needs to be carried out, which is relatively troublesome. In order to solve the above problems, the above structure is further improved.

[0048] The expansion mechanism includes a pair of L-shaped grooves 24 and straight grooves 25. The L-shaped grooves 24 are arranged below the F-shaped frame 11 at the top end of the aerobic tank 3, and the straight grooves 25 are arranged below the straight plate 10 at the top end of the aerobic tank 3. The straight plate 10 is fixedly connected at the bottom end with a pair of straight blocks 26 for sliding in the straight grooves 25. The F-shaped frame 11 is fixedly connected at the bottom end with a pair of circular blocks 27 for sliding in the L-shaped grooves 24. Threaded grooves are arranged at the top end of the aerobic tank 3 beside the two ends of the straight grooves 25, and threaded grooves are arranged at the bottom of the L-shaped grooves 24. A pair of upper bolts 28 are arranged at the top end of the straight plate 10 and are threadedly connected in the corresponding threaded grooves. A pair of lower bolts 29 are arranged at the top end of the F-shaped frame 11 and are threadedly connected in the threaded grooves in the L-shaped grooves 24 through the circular blocks 27. A pair of expansion bolts 30 are arranged at the top end of the expansion frame 12;

[0049] The plurality of expansion plates 15 are divided into two groups, and each group of expansion plates 15 is arranged near one side of the partition frame 7. The positions of the two groups of expansion plates 15 are staggered. The straight plate 10 is rotatably connected with an upper guide roller 31 beside one group of expansion plates 15 at the top end, and the F-shaped frame 11 is rotatably connected with a lower guide roller 32 beside the other group of expansion plates 15 at the top end. The arrangement of the upper guide roller 31 and the lower guide roller 32 can guide the expansion of the pull rope 20 on the straight plate 10 and the F-shaped frame 11;

[0050] A sliding groove 33 is arranged beside the sliding plate 6 at the top end of the aerobic tank 3. A moving plate 34 is slidably connected inside the sliding groove 33. The side wall of the moving plate 34 is fixedly connected with the side wall of the sliding plate 6. A pair of insertion grooves 35 are arranged at the top end of the moving plate 34. An insertion rod 36 is fixedly connected beside the insertion groove 35 on the side wall of the F-shaped frame 11. A pushing spring 37 is fixedly connected between the inside of the sliding groove 33 and the side wall of the moving plate 34. The partition frame 7 is fixedly connected at the bottom of the corresponding straight plate 10 and F-shaped frame 11.

[0051] When the existing aerobic tank 3 cannot meet the sewage treatment, further increase the residence time of sewage is needed, first of all, the straight plate 10 and the upper bolt 28 and the lower bolt 29 on the F-shaped frame 11 are unscrewed, then the straight plate 10 is pushed to drive the straight block 26 to slide in the straight groove 25, the straight block 26 is slid to the other end of the straight groove 25, at the same time, one of the partition frames 7 is slid and three of the adjusting plates 9 are slid to one side of the fixed plate 5, the distance between the fixed plate 5 and the adjusting plate 9 is reduced, then the upper bolt 28 is rotated in the opposite direction, and is screwed in the other pair of threaded grooves;

[0052] Then the F-shaped frame 11 is pushed to drive the round block 27 to slide in the L-shaped groove 24, at the same time, the other partition frame 7 is moved, at this time, the insertion rod 36 is inserted into the insertion groove 35 on the moving plate 34, then when the round block 27 moves to the corner of the L-shaped groove 24, the F-shaped frame 11 is pushed to move longitudinally, the round block 27 is slid to the other end of the L-shaped groove 24, at the same time, since the insertion rod 36 on the F-shaped frame 11 is inserted into the insertion groove 35, the moving plate 34 is moved together, the moving plate 34 is slid in the sliding groove 33, the pushing spring 37 is compressed, then the round block 27 moves to the other end of the L-shaped groove 24, the lower bolt 29 is rotated in the opposite direction and is screwed in the corresponding threaded groove, the position of the F-shaped frame 11 is fixed, in this process, the partition frame 7 is moved longitudinally and is in contact with the inner wall of the gap of the aerobic tank 3 before the moving, and the other end is separated from the inner wall of the aerobic tank 3;

[0053] Then the valve 40 on the U-shaped water outlet pipe 39 is closed, the valve 40 on the other end is opened, then the expansion frame 12 is placed between the partition frames 7, the expansion plate 15 is placed between the partition frames 7, then the expansion bolt 30 is installed in the threaded groove on the straight plate 10, the position of the expansion frame 12 is fixed, then the pulling rope 20 on the expansion plate 15 is passed through the outer wall of the upper guide roller 31 and the lower guide roller 32 and is bonded to the main rope 19, the rapid expansion of the device is completed;

[0054] When the electric telescopic cylinder 17 of the adjusting mechanism operates, the movement of the main rope 19 drives the pulling rope 20 on the expansion plate 15 to move, so that the above-mentioned operation of pulling the round shaft 16 on the expansion plate 15 to rotate is repeated, so that the adjustment of the S-shaped channel between the partition frames 7 is realized.

[0055] In summary, through the design of the above structure, when the residence time of the aerobic tank 3 in treating sewage cannot meet the existing demand, the straight plate 10 and the F-shaped frame 11 can be quickly separated, then the expansion frame 12 is installed between the straight plate 10 and the F-shaped frame 11, a channel is added, and the residence time of sewage treatment is increased, at the same time, the expansion plate 15 can be installed on the original adjusting mechanism, without the need to increase new electrical equipment, the convenience of the device is greatly improved.

[0056] A method for using a denitrification sewage treatment system coupling low-temperature concentration and biological reinforcement, comprising the following steps:

[0057] Step one: adjusting the residence time, first control the adjusting mechanism to drive multiple round shafts 16 to rotate, and then drive the adjusting plate 9 to overturn, overturn the adjusting plate 9 from the vertical state to the horizontal state, which can hinder the residence treatment time of the sewage in the aerobic tank 3;

[0058] Step two: expanding the installation, first release the limiting of the straight plate 10 and the F-shaped frame 11, then push the straight plate 10 and the F-shaped frame 11 to move along the expansion path, then install the expansion frame 12 and the expansion plate 15 between the straight plate 10 and the F-shaped frame 11, and connect the wiring of the adjusting mechanism, which can complete the rapid expansion.

[0059] The above shows and describes the basic principles, main features and advantages of the present application.

[0060] Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only the principles of the present application. Various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A denitrification wastewater treatment system coupling low-temperature concentration and bio-enhanced treatment, comprising a low-temperature concentration section (1) and a bio-enhanced section (2), wherein the bio-enhanced section (2) consists of an aerobic tank (3) and an anoxic tank (4), characterized in that: Three fixed plates (5) are fixedly connected to one side of the inner wall of the aerobic tank (3), and three sliding plates (6) are provided on the other side of the inner wall of the aerobic tank (3). A pair of partition frames (7) are provided in the middle of the aerobic tank (3). Three adjusting plates (9) are provided at equal intervals on the side of the partition frames (7) away from each other. Two of the adjusting plates (9) are respectively set between the fixed plates (5) and the sliding plates (6). Straight plates (10) and F-shaped frames (11) are respectively provided on both sides of the top of the aerobic tank (3). After the partition frames (7) are separated, a U-shaped expansion joint is installed. The expansion frame (12) has several support plates (14) fixedly connected to both sides. Each of the support plates (14) has an expansion plate (15) at its bottom. The expansion plate (15) and the adjustment plate (9) are fixedly connected to a round shaft (16). The top of the round shaft (16) passes through the top of the straight plate (10), the F-shaped frame (11) and the support plate (14) respectively. An adjustment mechanism for driving the multiple adjustment plates (9) to rotate is also provided. The expansion frame (12) is provided with an expansion mechanism for later expansion installation. The expansion mechanism includes an L-shaped trough (24) and a straight trough (25), each having a pair. The L-shaped trough (24) is located at the top of the aerobic tank (3) below the F-shaped frame (11), and the straight trough (25) is located at the top of the aerobic tank (3) below the straight plate (10). A pair of straight blocks (26) for sliding within the straight trough (25) are fixedly connected to the bottom of the straight plate (10), and a pair of circular blocks (27) for sliding within the L-shaped trough (24) are fixedly connected to the bottom of the F-shaped frame (11). The aerobic tank (3) has threaded grooves at both ends of the straight trough (25) at the top. The L-shaped trough (24) has threaded grooves at both ends of the bottom. The top of the straight plate (10) is provided with a pair of upper bolts (28), which are threaded into the corresponding threaded grooves. The top of the F-shaped frame (11) is provided with a pair of lower bolts (29), and the bottom of the lower bolts (29) passes through the round block (27) and is threaded into the threaded groove in the L-shaped trough (24). The top of the expansion frame (12) is provided with a pair of expansion bolts (30). The expansion plates (15) are divided into two groups. Each group of expansion plates (15) is set on the side close to the partition frame (7), and the positions of the two groups of expansion plates (15) are staggered. The top of the straight plate (10) is rotatably connected to the upper guide roller (31) relative to the side of one group of expansion plates (15), and the top of the F-shaped frame (11) is rotatably connected to the lower guide roller (32) relative to the side of the other group of expansion plates (15). The top of the aerobic pool (3) is provided with a chute (33) at the position next to the sliding plate (6). A movable plate (34) is slidably connected to the inside of the chute (33). The side wall of the movable plate (34) is fixedly connected to the side wall of the sliding plate (6). A pair of slots (35) are provided at the top of the movable plate (34). A plug rod (36) is fixedly connected to the side wall of the F-shaped frame (11) at the position next to the slot (35). A push spring (37) is fixedly connected between the inside of the chute (33) and the side wall of the movable plate (34). The partition frame (7) is fixedly connected to the bottom of the corresponding straight plate (10) and the F-shaped frame (11).

2. The denitrification wastewater treatment system coupled with low-temperature concentration and bio-enhanced treatment according to claim 1, characterized in that: The adjustment mechanism includes an electric telescopic cylinder (17), and there is a pair of electric telescopic cylinders (17). The electric telescopic cylinders (17) are respectively fixedly connected to the top of the straight plate (10) and the F-shaped frame (11). The output end of each electric telescopic cylinder (17) is fixedly connected to a pull plate (18). The side wall of each pull plate (18) is fixedly connected to a main rope (19). The outer wall of each round shaft (16) is wrapped with a pull rope (20). One end of the pull rope (20) is fixedly connected to the outer wall of the round shaft (16). The other end of the pull rope (20) above the adjustment plate (9) is fixedly connected to the main rope (19). The pull rope (20) on the expansion plate (15) is glued to the outer wall of the main rope (19) during expansion installation.

3. The denitrification wastewater treatment system coupled with low-temperature concentration and bio-enhanced treatment according to claim 2, characterized in that: The outer wall of each of the round shafts (16) is provided with a spiral spring (21). One end of the spiral spring (21) is fixed on the outer wall of the round shaft (16), and the other end of the spiral spring (21) is fixedly connected to the top of the corresponding straight plate (10), F-shaped frame (11) and support plate (14).

4. The denitrification wastewater treatment system coupled with low-temperature concentration and bio-enhanced treatment according to claim 1, characterized in that: Furthermore, the outer wall of the partition frame (7) is provided with several aeration holes (8) at equal intervals, and the partition frame (7) is connected to the external blower through the hose (13).

5. The denitrification wastewater treatment system coupled with low-temperature concentration and bio-enhanced treatment according to claim 1, characterized in that: The bottom of the straight plate (10), F-shaped frame (11) and support plate (14) are all provided with a quarter-circular guide groove (22) relative to the position next to the round shaft (16). The top of the adjusting plate (9) and the expansion plate (15) are all fixedly connected with round rods (23), and the round rods (23) are all slidably connected in the corresponding guide grooves (22).

6. The denitrification wastewater treatment system coupled with low-temperature concentration and bio-enhanced treatment according to claim 1, characterized in that: The aerobic tank (3) has an inlet connector (38) fixedly connected to the bottom of one side, and a U-shaped outlet pipe (39) fixedly connected to the top of the other side, and both ends of the U-shaped outlet pipe (39) are equipped with valves (40).

7. A method of using a denitrification wastewater treatment system coupled with low-temperature concentration and bio-enhanced treatment, the method being applicable to the denitrification wastewater treatment system coupled with low-temperature concentration and bio-enhanced treatment as described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Adjust the retention time. First, control the adjustment mechanism to drive multiple circular shafts (16) to rotate, which in turn drives the adjustment plate (9) to flip. Flip the adjustment plate (9) from a vertical state to a horizontal state, which can hinder the retention time of sewage in the aerobic tank (3). Step 2: Capacity expansion installation. First, release the limiting position of the straight plate (10) and the F-shaped frame (11). Then, push the straight plate (10) and the F-shaped frame (11) to move along the capacity expansion path. Then, install the capacity expansion frame (12) and the capacity expansion plate (15) between the straight plate (10) and the F-shaped frame (11), and connect the wiring of the adjustment mechanism to complete the rapid capacity expansion.

Images