Sulfur autotrophic denitrification station and process

Abstract

The present invention belongs to the field of denitrification base stations, in particular to a sulfur autotrophic denitrification base station and process, comprising an expansion device and a dosing device, wherein the dosing device is located above the expansion device, and the expansion device is connected to a water inlet pipe of a denitrification system; the expansion device comprises an expansion tank, and the bottom of the expansion tank is connected to a water inlet pipe of a denitrification system through a second water inlet pipe and a first water inlet pipe. In the present invention, two operating blocks at appropriate positions are manually pressed to release the braking state of the second inner slide cylinder, and the piston plate drives the second inner slide cylinder to move upward and pushes out excess medicine, and the piston plate starts to move downward, and the medicine enters the interior of the medicine box. After the medicine enters the interior of the first truncated cone block, it will fall between the first cylindrical block and the second cylindrical block along the inclined surface of the first truncated cone block, completing the discharging operation with intervals, so that the medicine is added evenly.

Description

Technical Field

[0001] The present invention relates to the technical field of denitrification base stations, and in particular to a sulfur autotrophic denitrification base station and process. Background Art

[0002] With the rapid development of my country's petrochemical, metallurgical, food processing, livestock and poultry breeding industries, as well as the accelerating urbanization process, a large amount of wastewater containing high-concentration nitrogen is discharged into water bodies, causing eutrophication of water bodies and causing ecosystem disorder; on the other hand, nitrogen, as the energy source of nitrifying bacteria, consumes dissolved oxygen in the water and causes water hypoxia, and nitrate will be converted into nitrite under hypoxic conditions, producing "three-hazard effects" that endanger human health and environmental quality.

[0003] After searching, the invention with the announcement number CN117247142A discloses a sulfur autotrophic denitrification treatment device, which includes a sulfur autotrophic denitrification bacteria expansion system and a denitrification system; the sulfur autotrophic denitrification bacteria expansion system includes an expansion device and a dosing device connected to the expansion device, and the expansion device is connected to the denitrification system. The present invention adds a sulfur autotrophic denitrification bacteria expansion unit on the basis of the existing sulfur autotrophic denitrification denitrification process. In the sulfur autotrophic denitrification bacteria expansion unit, more and richer nutrients can be provided for the sulfur autotrophic denitrification bacteria, and a longer hydraulic retention time can be provided, thereby cultivating a higher density of sulfur autotrophic denitrification bacteria.

[0004] This treatment device is directly put into use when adding medicine, and the amount of medicine added is controlled by the on-off of the valve. The amount of medicine added cannot be controlled, and it is easy to cause over-dosing, which is inconvenient to use. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art that the treatment device is directly put into the treatment device when adding medicine, and the amount of medicine added is controlled by the on-off of the valve, the amount of medicine added cannot be controlled, and the operation of excessive medicine addition is prone to occur, which is inconvenient to use. A sulfur autotrophic denitrification base station and process are proposed.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A sulfur autotrophic denitrification denitrification base station, comprising an expansion device and a dosing device, wherein the dosing device is located above the expansion device, and the expansion device is connected to a water inlet pipe of a denitrification system; the expansion device comprises an expansion tank, the bottom of which is connected to a water inlet pipe of a denitrification system through a second water inlet pipe and a first water inlet pipe, and the top of which is connected to a water inlet pipe of a denitrification system through a water outlet pipe; a circulation pipe is arranged between the water outlet pipe and the second water inlet pipe; a lifting pump is arranged between the second water inlet pipe and the first water inlet pipe and an inlet valve, the outlet pipe is provided with an outlet valve, and the circulation pipe is provided with a stop valve; the expansion tank, the second water inlet pipe, the first water inlet pipe, the circulation pipe, the stop valve, the outlet pipe and the lift pump can form a circulation passage, the expansion tank is provided with a denitrification filler and a sulfur autotrophic denitrifying bacteria immobilization carrier, the denitrification filler is sulfur, pyrite, pyrite as an electron donor for the sulfur autotrophic denitrification reaction, and the sulfur autotrophic denitrifying bacteria immobilization carrier is an embedded denitrifying thiobacillus; the expansion tank is also provided with an exhaust pipe;

[0008] The dosing device comprises a plurality of fixed cylinders, which are all fixedly connected to the top of the expansion tank, the top of the fixed cylinder is fixedly connected to a medicine box, the interior of the fixed cylinder is slidably penetrated by an inner slide cylinder 1, and the interior of the inner slide cylinder 1 is slidably penetrated by an inner slide cylinder 2;

[0009] A fixing assembly, which is arranged on the top inner wall of the medicine box and is used to fix the position of the second inner slide cylinder;

[0010] Multiple groups of limiting components, each of which is arranged on the top inner wall of the expansion tank, the top inner wall of the expansion tank is rotatably connected with multiple second rotating shafts, and the multiple groups of limiting components are respectively used in conjunction with multiple medicine boxes to limit the amount of added medicine;

[0011] The medicine adding component is arranged inside the expansion tank and is used for uniform medicine adding.

[0012] In a possible design, the fixing assembly includes two round rods that slide through both sides of the medicine box respectively, one end of the round rod is fixedly connected to a limiting plate, and the end of the round rod away from the limiting plate is fixedly connected to a side block, and a same first tension spring is fixedly connected between one side of the side block and one side of the medicine box, and the first tension spring is sleeved on the outside of the round rod, and limiting grooves are provided on both sides of the top of the inner sliding cylinder, and the limiting grooves are used in conjunction with the limiting plate.

[0013] In a possible design, the fixing component also includes a medicine adding port opened on the top of the medicine box, and the top inner wall of the medicine box is fixedly connected with a sealing plate, and the sealing plate is used in conjunction with the inner slide cylinder 2. The internal thread of the medicine adding port is penetrated by a sealing block, and the interior of the sealing block is provided with two symmetrically arranged rectangular holes, and the interior of the rectangular hole is slidably penetrated by a vertical plate, and a clamping block is fixedly connected to one side of the bottom of the vertical plate, and the inner wall of the inner slide cylinder 2 is provided with two symmetrically arranged clamping grooves, and the clamping grooves are engaged with the clamping blocks, and two symmetrically arranged second tension springs are fixedly connected between one side of the vertical plate and one side of the rectangular hole, the top of the vertical plate is fixedly connected with a baffle, and the top of the baffle is fixedly connected with an operating block, and the outer wall of the sealing block is fixedly sleeved with an operating ring.

[0014] In a possible design, the limiting component includes two synchronous wheels which are rotatably connected to the inner wall of the top of the expansion tank and fixedly sleeved on the outer wall of the second rotating shaft. A screw rod passes through the internal thread of a synchronous wheel away from the second rotating shaft. The bottom of the screw rod is fixedly connected to a limiting block. The top of the screw rod is fixedly connected to a piston plate extending to the interior of the inner slide cylinder 2. The interior of the inner slide cylinder 2 is provided with an electromagnet used in conjunction with the piston plate. The bottom of the second rotating shaft is fixedly connected to a third spur gear. The outer wall transmission sleeves of the two synchronous wheels are provided with the same synchronous belt.

[0015] In one possible design, the dosing component includes a rotating rod that rotates and passes through the top of the expansion tank, the bottom of the rotating rod is fixedly connected to a second truncated cone block, the top of the second truncated cone block is fixedly connected to a first cylindrical block, the inner wall of the expansion tank is fixedly connected to the first truncated cone block, the first truncated cone block is located directly above the second truncated cone block, the bottom of the first truncated cone block is fixedly connected to a second cylindrical block, the second cylindrical block is located inside the first cylindrical block, the outer walls of the second cylindrical block and the first cylindrical block are both provided with a plurality of notches, the outer wall of the rotating rod is fixedly sleeved with a fourth spur gear, and the fourth spur gear is meshed with a plurality of third spur gears.

[0016] In one possible design, an L-shaped plate is fixedly connected to the top of the expansion tank, a servo motor is fixedly connected to the bottom of the L-shaped plate, an output shaft of the servo motor is fixedly connected to a first spur gear, and an outer wall of the rotating rod is fixedly sleeved with a second spur gear meshing with the first spur gear.

[0017] In a possible design, the top of the expansion tank is fixedly connected to an electromagnetic clutch through a bracket, the output shaft of the electromagnetic clutch is fixedly connected to a first rotating shaft, the input shaft of the electromagnetic clutch is fixedly connected to the top of the rotating rod, the outer wall of the first rotating shaft is fixedly connected to a push rod, the bottom of the push rod is fixedly connected to a first connecting rod, the bottom of the first connecting rod is fixedly connected to a pushing circular plate, the pushing circular plate is used in conjunction with one of the side blocks, one side of the two side blocks is fixedly connected to a second connecting rod, one side of the second connecting rod is fixedly connected to a rack, the top of the medicine box is rotatably connected to a fifth spur gear, and the fifth spur gear is meshed with two racks.

[0018] In a possible design, the inner wall of the fixed cylinder is provided with two second sliding grooves, the outer wall of the inner sliding cylinder one is fixedly connected with two symmetrically arranged second sliding blocks, the second sliding blocks are slidably connected to the second sliding grooves, the inner wall of the inner sliding cylinder one is provided with two symmetrically arranged first sliding grooves, the outer wall of the inner sliding cylinder two is fixedly connected with two symmetrically arranged first sliding blocks, the first sliding blocks are slidably connected to the first sliding grooves.

[0019] In a possible design, four legs are fixedly connected to the bottom of the expansion tank in pairs, the bottoms of two legs on the same side are fixedly connected to the same support plate, the two legs on the same side are fixedly connected to the same second reinforcing rod, the tops of the second reinforcing rod and the support plate are both provided with support seats, the support seats are used to support the water inlet pipe and circulation pipe of the denitrification system, the two legs close to the lifting pump are fixedly connected to the same first reinforcing rod, one side of the first reinforcing rod is fixedly connected to a mounting plate, and the mounting plate is fixedly connected to one side of the lifting pump.

[0020] A sulfur autotrophic denitrification process specifically comprises the following steps:

[0021] S1. Open the inlet valve, use the lifting pump to lift the wastewater to be denitrified from the denitrification system inlet pipe, and enter the expansion tank through the inlet pipe 2 and the inlet pipe 1. When the expansion tank is filled to 90%, the outlet pipe starts to drain, close the inlet valve and the outlet valve, open the stop valve, and the wastewater to be denitrified in the expansion tank circulates in a closed loop through the lifting pump, the inlet pipe 2 and the inlet pipe 1, the expansion tank, the outlet pipe, and the circulation pipe;

[0022] S2, adding sodium nitrate through the dosing device, the dosing concentration is 100 mg / L (calculated as nitrate nitrogen); adding sodium carbonate through the dosing device to control the pH value of the wastewater to be denitrified between 7.0 and 8.5; adding ammonium chloride through the dosing device, the dosing concentration is 1 mg / L (calculated as ammonia nitrogen); adding potassium dihydrogen phosphate through the dosing device, the dosing concentration is 0.2 mg / L (calculated as phosphorus element);

[0023] S3, cyclic cultivation, when the nitrate nitrogen removal rate in the wastewater to be denitrified is greater than 3mg / L / h, the immobilized sulfur autotrophic denitrifying bacteria are activated to obtain a culture solution, which provides bacteria for the expansion of sulfur autotrophic denitrifying bacteria. The flow rate of the culture solution is the supporting denitrification system (upflow sulfur autotrophic denitrification tower, processing capacity 1m 3 / h) treatment capacity of 0.1%. When the denitrification system operates normally, the hydraulic retention time of the expansion liquid in the expansion tank is 2h.

[0024] In this application, the inlet valve is opened, and the wastewater to be denitrified is lifted from the denitrification system inlet pipe by a lifting pump, and enters the expansion tank through the second and first inlet pipes. When the expansion tank is filled to 90%, the outlet pipe starts to drain, the inlet valve and the outlet valve are closed, and the stop valve is opened. The wastewater to be denitrified in the expansion tank is circulated in a closed loop through the lifting pump, the second and first inlet pipes, the expansion tank, the outlet pipe, and the circulation pipe process;

[0025] Sodium nitrate is added through the dosing device at a concentration of 100 mg / L (calculated as nitrate nitrogen); sodium carbonate is added through the dosing device to control the pH value of the wastewater to be denitrified between 7.0 and 8.5; ammonium chloride is added through the dosing device at a concentration of 1 mg / L (calculated as ammonia nitrogen); potassium dihydrogen phosphate is added through the dosing device at a concentration of 0.2 mg / L (calculated as phosphorus element);

[0026] Cyclic culture, when the nitrate nitrogen removal rate in the wastewater to be denitrified is greater than 3mg / L / h, the immobilized sulfur autotrophic denitrifying bacteria are activated to obtain a culture solution, which provides bacteria for the expansion of sulfur autotrophic denitrifying bacteria. The flow rate of the culture solution is the supporting denitrification system (upflow sulfur autotrophic denitrification tower, processing capacity 1m 3 / h) treatment capacity of 0.1%. When the denitrification system operates normally, the hydraulic retention time of the expansion liquid in the expansion tank is 2h;

[0027] When adding medicine is needed, the two operating blocks at the appropriate positions are manually pressed, and the operating blocks drive the two vertical plates to approach each other. The vertical plates squeeze the second tension spring and drive the two clamping blocks to approach each other. The two clamping blocks can be moved out from the inside of the clamping slot. At this time, the braking state of the inner slide cylinder 2 can be released, and the inner slide cylinder 2 and the inner slide cylinder 1 fall into the inside of the fixed cylinder in sequence;

[0028] The medicine falls into the interior of the second inner slide cylinder, and the electromagnet is started at this time, so that the electromagnet is attracted to the piston plate, and the servo motor is started, and the output shaft of the servo motor drives the first spur gear to rotate, the first spur gear drives the second spur gear to rotate, the second spur gear drives the rotating rod to rotate, the rotating rod drives the fourth spur gear to rotate, the fourth spur gear drives the third spur gear to rotate, and the third spur gear drives the screw rod to move upward through the synchronous wheel and the synchronous belt, and at this time the screw rod and the piston plate drive the second inner slide cylinder to move upward;

[0029] When the inner slide cylinder 2 moves to the highest point, the space above the piston plate will be filled with drugs. At this time, the limit plate will engage with the limit groove, thereby ensuring the stability of the inner slide cylinder 2. When the amount of drug added needs to be adjusted, the piston plate can continue to move up to overcome the attraction with the electromagnet, thereby pushing out the excess drug.

[0030] During the rising process of the piston plate, the electromagnetic clutch can be started, at this time, the first rotating shaft rotates, the first rotating shaft drives the push rod to rotate, the push rod drives the first connecting rod and the push circular plate to rotate, so that the push circular plate moves to one side of the appropriate side block, after the medicine is pushed out, the push circular plate moves to the front of the side block and pushes the side block away, at this time, the side block can drive another side block to move through the rack and the sealing block, the two side blocks drive the two round rods and the limit plate to move away from each other, and at this time the limit plate moves out from the inside of the limit groove;

[0031] After the brake of the inner slide cylinder 2 is released, the inner slide cylinder 2 and the piston plate continue to move upward, the top of the inner slide cylinder 2 contacts the bottom of the sealing plate, and the card slot and the card block are engaged again to ensure that the inner slide cylinder 2 will not fall. At this time, the output shaft of the servo motor rotates in the opposite direction, and the piston plate can start to move downward. It is necessary to wait until the piston plate is separated from the bottom of the inner slide cylinder 2. The medicine will be discharged along the gap between the inner slide cylinder 2, the inner slide cylinder 1 and the fixed cylinder, and enter the interior of the expansion tank to complete the dosing process;

[0032] Since the braking state of the corresponding inner slide cylinder 2 is not released inside other medicine boxes, the up and down movement of the piston plate will not bring out other medicines, thereby achieving accurate addition of medicines. After the medicine enters the interior of the first truncated cone block, it will fall between the first cylindrical block and the second cylindrical block along the inclined surface of the first truncated cone block, and when the rotating rod rotates, it will drive the second truncated cone block to rotate, and the second truncated cone block will drive the first cylindrical block to rotate. At this time, the overlapping of multiple notches can complete the discharging operation with intervals, so that the medicine is added evenly, and the sealing block can be rotated out as a whole to facilitate the replenishment of medicines. Beneficial Effects

[0033] In the present invention, the sulfur autotrophic denitrification denitrification station and process can achieve the effect of fixing the inner slide cylinder 2 by means of a fixing component, and then the inner slide cylinder 2 can be fixed above the medicine box, and the excess medicine can be discharged by cooperating with the limiting component, and then the dosage can be accurately controlled;

[0034] In the present invention, the sulfur autotrophic denitrification denitrification station and process can achieve the effect of uniform dosing through the dosing component, and the one or more drugs to be added can be reserved between the second cylindrical block and the first cylindrical block, and then slowly added to ensure uniform dosing;

[0035] In the present invention, the two operating blocks at the appropriate positions are manually pressed to release the braking state of the inner slide cylinder 2, and the medicine falls into the interior of the inner slide cylinder 2. The piston plate drives the inner slide cylinder 2 to move upward and pushes out the excess medicine. The piston plate starts to move downward, and the medicine is discharged along the gap between the inner slide cylinder 2, the inner slide cylinder 1 and the fixed cylinder, and enters the interior of the expansion tank to complete the dosing process. After the medicine enters the interior of the first truncated cone block, it will fall between the first cylindrical block and the second cylindrical block along the inclined surface of the first truncated cone block, completing the discharging operation with intervals, so that the medicine is added evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the three-dimensional structure of a sulfur autotrophic denitrification base station and process proposed by the present invention;

[0037] Figure 2 A schematic diagram of the three-dimensional structure of a sulfur autotrophic denitrification base station and process from a second perspective proposed by the present invention;

[0038] Figure 3 A schematic diagram of the three-dimensional structure of a sulfur autotrophic denitrification base station and pipelines in the process proposed by the present invention;

[0039] Figure 4 A schematic diagram of the three-dimensional structure of a sulfur autotrophic denitrification base station and a medicine box and a first truncated cone block in the process proposed by the present invention;

[0040] Figure 5 A schematic diagram of the three-dimensional structure of the first truncated cone block and the second truncated cone block in a sulfur autotrophic denitrification base station and process proposed by the present invention;

[0041] Figure 6 It is a three-dimensional cross-sectional structural schematic diagram of the inner slide cylinder 1 and the inner slide cylinder 2 in a sulfur autotrophic denitrification station and process proposed by the present invention;

[0042] Figure 7 A schematic diagram of the three-dimensional structure of a sulfur autotrophic denitrification base station and a medicine box in the process proposed by the present invention;

[0043] Figure 8 A schematic diagram of the three-dimensional cross-sectional structure of a sulfur autotrophic denitrification base station and a medicine box in the process proposed by the present invention;

[0044] Fig. 9 This is a schematic diagram of the explosion structure of a sulfur autotrophic denitrification base station and a medicine box and an operating ring in the process proposed by the present invention;

[0045] Fig.10 A schematic diagram of the three-dimensional structure of a sealing block and a vertical plate in a sulfur autotrophic denitrification base station and a process proposed by the present invention;

[0046] Fig.11This is a schematic diagram of the three-dimensional structure of the inner slide cylinder 2 in a sulfur autotrophic denitrification base station and process proposed by the present invention.

[0047] In the figure: 1, expansion tank; 2, water outlet pipe; 3, denitrification system water inlet pipe; 4, circulation pipe; 5, water inlet pipe 2; 6, lifting pump; 7, water inlet pipe 1; 8, fixed cylinder; 9, medicine box; 10, support leg; 11, support plate; 12, first spur gear; 13, second spur gear; 14, first rotating shaft; 15, servo motor; 16, L-shaped plate; 17, push rod; 18, mounting plate; 19, first reinforcing rod; 20, support seat; 21, second reinforcing rod; 22, synchronous wheel; 23, synchronous belt; 24, third spur gear; 25, first round table block; 26, limit block; 27, screw rod; 28, piston plate; 29, second rotating shaft; 30, fourth spur gear; 31, second round table block; 32 , the first cylindrical block; 33, the notch; 34, the second cylindrical block; 35, the inner slide cylinder one; 36, the inner slide cylinder two; 37, the first slide groove; 38, the second slide groove; 39, the first slider; 40, the second slider; 41, the push circular plate; 42, the first connecting rod; 43, the side block; 44, the rack; 45, the sealing block; 46, the operating ring; 47, the second connecting rod; 48, the fifth spur gear; 49, the limit plate; 50, the first tension spring; 51, the round rod; 52, the sealing plate; 53, the rectangular hole; 54, the operating block; 55, the baffle; 56, the vertical plate; 57, the second tension spring; 58, the block; 59, the slot; 60, the limit slot; 61, the electromagnet; 62, the electromagnetic clutch; 63, the rotating rod. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example 1

[0049] Reference Figure 1-11A sulfur autotrophic denitrification denitrification base station, which is used in the field of denitrification base stations, includes: an expansion device and a dosing device, the dosing device is located above the expansion device, and the expansion device is connected to the denitrification system water inlet pipe 3; the expansion device includes an expansion tank 1, the bottom of the expansion tank 1 is connected to the denitrification system water inlet pipe 3 through the water inlet pipe 2 5 and the water inlet pipe 1 7, and the top of the expansion tank 1 is connected to the denitrification system water inlet pipe 3 through the water outlet pipe 2; a circulation pipe 4 is provided between the water outlet pipe 2 and the water inlet pipe 2 5; a circulation pipe 4 is provided between the water inlet pipe 2 5 and the water inlet pipe 1 7 A lifting pump 6 and an inlet valve are arranged in the middle, an outlet valve is arranged on the outlet pipe 2, and a stop valve is arranged on the circulation pipe 4; the expansion tank 1, the inlet pipe 2 5, the inlet pipe 1 7, the circulation pipe 4, the stop valve, the outlet pipe 2 and the lifting pump 6 can form a circulation passage, and the expansion tank 1 is provided with a denitrification filler and a sulfur autotrophic denitrifying bacteria immobilization carrier, the denitrification filler is sulfur, pyrite, pyrite as an electron donor for the sulfur autotrophic denitrification reaction, and the sulfur autotrophic denitrifying bacteria immobilization carrier is an embedded denitrifying thiobacillus; the expansion tank 1 is also provided with an exhaust pipe;

[0050] The dosing device includes a plurality of fixed cylinders 8, which are all fixedly connected to the top of the expansion tank 1. The top of the fixed cylinder 8 is fixedly connected to a medicine box 9. The interior of the fixed cylinder 8 is slidably penetrated by an inner slide cylinder 1 35, and the interior of the inner slide cylinder 1 35 is slidably penetrated by an inner slide cylinder 2 36. The inner wall of the fixed cylinder 8 is provided with two second slide grooves 38. The outer wall of the inner slide cylinder 1 35 is fixedly connected with two symmetrically arranged second sliders 40. The second slider 40 is slidably connected to the second slide groove 38. The inner wall of the inner slide cylinder 1 35 is provided with two symmetrically arranged first slide grooves 37, and the outer wall of the inner slide cylinder 2 36 is fixedly connected with two symmetrically arranged first sliders 39, the first slider 39 is slidably connected with the first slide groove 37, and after the brake of the inner slide cylinder 2 36 is released, the inner slide cylinder 2 36 and the piston plate 28 continue to move upward, and the top of the inner slide cylinder 2 36 conflicts with the bottom of the sealing plate 52, and the card groove 59 and the card block 58 are engaged again to ensure that the inner slide cylinder 2 36 will not fall. At this time, the output shaft of the servo motor 15 rotates in the opposite direction, so that the piston plate 28 can start to move downward. It is necessary to wait until the piston plate 28 is separated from the bottom of the inner slide cylinder 2 36, and the medicine will be discharged along the gap between the inner slide cylinder 2 36, the inner slide cylinder 1 35 and the fixed cylinder 8, and enter the interior of the expansion tank 1 to complete the dosing process;

[0051] A fixing component is arranged on the top inner wall of the medicine box 9 and is used to fix the position of the inner slide cylinder 2 36. The fixing component includes two round rods 51 that slide through the two sides of the medicine box 9 respectively. One end of the round rod 51 is fixedly connected to the limiting plate 49. The end of the round rod 51 away from the limiting plate 49 is fixedly connected to the side block 43. The same first tension spring 50 is fixedly connected between one side of the side block 43 and one side of the medicine box 9. The first tension spring 50 is sleeved on the outside of the round rod 51. Limiting grooves 60 are provided on both sides of the top of the inner slide cylinder 2 36. The positioning groove 60 is used in conjunction with the limiting plate 49, and the fixing component also includes a medicine adding port opened on the top of the medicine box 9. The top inner wall of the medicine box 9 is fixedly connected with a sealing plate 52, and the sealing plate 52 is used in conjunction with the inner slide cylinder 36. The internal thread of the medicine adding port is penetrated by a sealing block 45, and the inside of the sealing block 45 is provided with two symmetrically arranged rectangular holes 53, and the inside of the rectangular hole 53 is slidably penetrated by a vertical plate 56, and a clamping block 58 is fixedly connected to one side of the bottom of the vertical plate 56, and the inner wall of the inner slide cylinder 36 is provided with two symmetrically arranged clamping grooves 59. 59 is engaged with the card block 58. When the inner slide cylinder 36 moves to the highest point, the space above the piston plate 28 will be filled with medicine. At this time, the limit plate 49 will be engaged with the limit groove 60, thereby ensuring the stability of the inner slide cylinder 36. When the amount of medicine added needs to be adjusted, the piston plate 28 can continue to move up to overcome the attraction with the electromagnet 61, and then the excess medicine can be pushed out. Two second tension springs 57 symmetrically arranged are fixedly connected between one side of the vertical plate 56 and one side of the rectangular hole 53. A baffle 55 is fixedly connected to the top, and an operating block 54 is fixedly connected to the top of the baffle 55. An operating ring 46 is fixedly sleeved on the outer wall of the sealing block 45. The two operating blocks 54 at the appropriate positions are manually pressed, and the operating blocks 54 drive the two vertical plates 56 to approach each other. The vertical plates 56 squeeze the second tension spring 57 and drive the two clamping blocks 58 to approach each other. The two clamping blocks 58 can be moved out from the inside of the clamping groove 59. At this time, the braking state of the inner slide cylinder 2 36 can be released, and the inner slide cylinder 2 36 and the inner slide cylinder 1 35 fall into the inside of the fixed cylinder 8 in sequence;

[0052] Multiple groups of limiting components, all of which are arranged on the top inner wall of the expansion tank 1, and the top inner wall of the expansion tank 1 is rotatably connected with multiple second rotating shafts 29. The multiple groups of limiting components are used in conjunction with multiple medicine boxes 9 and are used to limit the amount of added medicine. The limiting components include two synchronous wheels 22 that are rotatably connected to the top inner wall of the expansion tank 1 and fixedly sleeved on the outer wall of the second rotating shaft 29. The internal thread of a synchronous wheel 22 away from the second rotating shaft 29 passes through a screw rod 27, and the bottom of the screw rod 27 is fixedly connected to a limited position block 26. The top of the screw rod 27 is fixedly connected to a piston plate 28 that extends to the interior of the inner slide cylinder 36. The interior of the inner slide cylinder 36 is provided with an electromagnet 61 that cooperates with the piston plate 28. The second rotating shaft 2 The bottom of 9 is fixedly connected with a third spur gear 24, and the outer wall transmission sleeves of the two synchronous wheels 22 are provided with the same synchronous belt 23. The medicine falls into the interior of the second inner slide cylinder 36, and the electromagnet 61 is started at this time, so that the electromagnet 61 is attracted to the piston plate 28, and the servo motor 15 is started. The output shaft of the servo motor 15 drives the first spur gear 12 to rotate, the first spur gear 12 drives the second spur gear 13 to rotate, the second spur gear 13 drives the rotating rod 63 to rotate, the rotating rod 63 drives the fourth spur gear 30 to rotate, the fourth spur gear 30 drives the third spur gear 24 to rotate, and the third spur gear 24 drives the screw rod 27 to move upward through the synchronous wheel 22 and the synchronous belt 23, and at this time the screw rod 27 and the piston plate 28 drive the second inner slide cylinder 36 to move upward;

[0053] The dosing component is arranged inside the expansion tank 1 and is used for uniform dosing. The dosing component includes a rotating rod 63 that rotates and runs through the top of the expansion tank 1. The bottom of the rotating rod 63 is fixedly connected to the second truncated cone block 31, and the top of the second truncated cone block 31 is fixedly connected to the first cylindrical block 32. The inner wall of the expansion tank 1 is fixedly connected to the first truncated cone block 25, and the first truncated cone block 25 is located directly above the second truncated cone block 31. The bottom of the first truncated cone block 25 is fixedly connected to the second cylindrical block 34, and the second cylindrical block 34 is located inside the first cylindrical block 32. The outer walls of the second cylindrical block 34 and the first cylindrical block 32 are both provided with a plurality of notches 33. Since the braking state of the corresponding inner slide cylinder 2 36 is not released inside the other medicine boxes 9, the piston plate 28 does not move up and down at this time. It will bring out other drugs, and realize accurate addition of drugs. After the drugs enter the interior of the first truncated cone block 25, they will fall between the first cylindrical block 32 and the second cylindrical block 34 along the inclined surface of the first truncated cone block 25, and when the rotating rod 63 rotates, the second truncated cone block 31 is driven to rotate, and the second truncated cone block 31 drives the first cylindrical block 32 to rotate. At this time, the overlapping of multiple notches 33 can complete the discharging operation with intervals, so that the drug addition is uniform, and the sealing block 45 can be rotated out as a whole to facilitate the replenishment of drugs. The outer wall of the rotating rod 63 is fixedly sleeved with a fourth spur gear 30, and the fourth spur gear 30 is meshed with multiple third spur gears 24. The top of the expansion tank 1 is fixedly connected with an L-shaped plate 16, and the bottom of the L-shaped plate 16 is fixedly connected with a servo motor 15. The servo motor 15 The output shaft is fixedly connected with the first spur gear 12, the outer wall of the rotating rod 63 is fixedly sleeved with a second spur gear 13 meshing with the first spur gear 12, the top of the expansion tank 1 is fixedly connected with the electromagnetic clutch 62 through a bracket, the output shaft of the electromagnetic clutch 62 is fixedly connected with the first rotating shaft 14, the input shaft of the electromagnetic clutch 62 is fixedly connected with the top of the rotating rod 63, the outer wall of the first rotating shaft 14 is fixedly connected with a push rod 17, the bottom of the push rod 17 is fixedly connected with a first connecting rod 42, the bottom of the first connecting rod 42 is fixedly connected with a push circular plate 41, the push circular plate 41 is used in conjunction with one of the side blocks 43, one side of the two side blocks 43 is fixedly connected with a second connecting rod 47, one side of the second connecting rod 47 is fixedly connected with a rack 44, the medicine box The top of 9 is rotatably connected with a fifth spur gear 48, and the fifth spur gear 48 is meshed with two racks 44. During the rising process of the piston plate 28, the electromagnetic clutch 62 can be started, and the first rotating shaft 14 rotates, and the first rotating shaft 14 drives the push rod 17 to rotate, and the push rod 17 drives the first connecting rod 42 and the push circular plate 41 to rotate, so that the push circular plate 41 moves to one side of a suitable side block 43. After the medicine is pushed out, the push circular plate 41 moves to the front of the side block 43 and pushes the side block 43 away. At this time, the side block 43 can drive another side block 43 to move through the rack 44 and the sealing block 45, and the two side blocks 43 drive the two round rods 51 and the limit plate 49 to move away from each other. At this time, the limit plate 49 moves out from the inside of the limit groove 60.

[0054] A sulfur autotrophic denitrification process specifically comprises the following steps:

[0055] S1, open the inlet valve, use the lifting pump 6 to lift the wastewater to be denitrified from the denitrification system inlet pipe 3, and enter the expansion tank 1 through the inlet pipe 2 5 and the inlet pipe 1 7. The expansion tank 1 is filled to 90%, and the outlet pipe 2 starts to drain. Close the inlet valve and the outlet valve, open the stop valve, and the wastewater to be denitrified in the expansion tank 1 is circulated in a closed loop through the lifting pump 6, the inlet pipe 2 5 and the inlet pipe 1 7, the expansion tank 1, the outlet pipe 2, and the circulation pipe 4;

[0056] S2, adding sodium nitrate through the dosing device, the dosing concentration is 100 mg / L (in terms of nitrate nitrogen); adding sodium carbonate through the dosing device to control the pH value of the wastewater to be denitrified to 7.0; adding ammonium chloride through the dosing device, the dosing concentration is 1 mg / L (in terms of ammonia nitrogen); adding potassium dihydrogen phosphate through the dosing device, the dosing concentration is 0.2 mg / L (in terms of phosphorus element);

[0057] S3, cyclic cultivation, when the nitrate nitrogen removal rate in the wastewater to be denitrified is greater than 3mg / L / h, the immobilized sulfur autotrophic denitrifying bacteria are activated to obtain a culture solution, which provides bacteria for the expansion of sulfur autotrophic denitrifying bacteria. The flow rate of the culture solution is the supporting denitrification system (upflow sulfur autotrophic denitrification tower, processing capacity 1m 3 / h) treatment capacity of 0.1%. When the denitrification system operates normally, the hydraulic retention time of the expansion liquid in the expansion tank 1 is 2h. Example 2

[0058] refer to Figure 1-11 , improved on the basis of Example 1: four symmetrical legs 10 are fixedly connected to the bottom of the expansion tank 1, the bottoms of the two legs 10 on the same side are fixedly connected to the same support plate 11, the two legs 10 on the same side are fixedly connected to the same second reinforcing rod 21, the tops of the second reinforcing rod 21 and the support plate 11 are both provided with support seats 20, the support seats 20 are used to support the denitrification system water inlet pipe 3 and the circulation pipe 4, the two legs 10 close to the lifting pump 6 are fixedly connected to the same first reinforcing rod 19, one side of the first reinforcing rod 19 is fixedly connected to a mounting plate 18, and the mounting plate 18 is fixedly connected to one side of the lifting pump 6.

[0059] However, as is well known to those skilled in the art, the working principles and wiring methods of the lift pump 6, electromagnet 61, servo motor 15 and electromagnetic clutch 62 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art may make any optional selections according to their needs or convenience.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sulfur autotrophic denitrification base station, characterized in that: include: A culture expansion device and a dosing device, wherein the dosing device is located above the culture expansion device, and the culture expansion device is connected to a water inlet pipe (3) of a denitrification system; the culture expansion device comprises a culture expansion tank (1), the bottom of the culture expansion tank (1) is connected to a water inlet pipe (3) of a denitrification system via a second water inlet pipe (5) and a first water inlet pipe (7), and the top of the culture expansion tank (1) is connected to a water inlet pipe (3) of a denitrification system via a water outlet pipe (2); a circulation pipe (4) is provided between the water outlet pipe (2) and the second water inlet pipe (5); a lifting pump (6) is provided between the second water inlet pipe (5) and the first water inlet pipe (7) and an inlet valve, the outlet pipe (2) is provided with an outlet valve, and the circulation pipe (4) is provided with a stop valve; the expansion tank (1), the second inlet pipe (5), the first inlet pipe (7), the circulation pipe (4), the stop valve, the outlet pipe (2) and the lift pump (6) can form a circulation path, the expansion tank (1) is provided with a denitrifying filler and a sulfur autotrophic denitrifying bacteria immobilization carrier, the denitrifying filler is sulfur, pyrite, pyrite as an electron donor for the sulfur autotrophic denitrification reaction, and the sulfur autotrophic denitrifying bacteria immobilization carrier is an embedded denitrifying thiobacillus; the expansion tank (1) is also provided with an exhaust pipe; The dosing device comprises a plurality of fixed cylinders (8), the plurality of fixed cylinders (8) are fixedly connected to the top of the expansion tank (1), the top of the fixed cylinder (8) is fixedly connected to a medicine box (9), the interior of the fixed cylinder (8) is slidably penetrated by an inner slide cylinder 1 (35), and the interior of the inner slide cylinder 1 (35) is slidably penetrated by an inner slide cylinder 2 (36); A fixing assembly, the fixing assembly being arranged on the top inner wall of the medicine box (9) and being used to fix the position of the second inner slide cylinder (36); A plurality of sets of limiting components, each of which is arranged on the top inner wall of the expansion tank (1), the top inner wall of the expansion tank (1) being rotatably connected to a plurality of second rotating shafts (29), and the plurality of sets of limiting components are respectively used in conjunction with a plurality of medicine boxes (9) and are used to limit the amount of medicine added; A drug adding component, which is arranged inside the expansion tank (1) and is used for uniform drug addition; The fixing assembly comprises two round rods (51) which slide through the two sides of the medicine box (9), one end of the round rod (51) is fixedly connected to the limiting plate (49), one end of the round rod (51) away from the limiting plate (49) is fixedly connected to the side block (43), one side of the side block (43) and one side of the medicine box (9) are fixedly connected with the same first tension spring (50), the first tension spring (50) is sleeved on the outside of the round rod (51), and limiting grooves (60) are provided on both sides of the top of the second inner slide cylinder (36), and the limiting grooves (60) are used in conjunction with the limiting plate (49); The fixing assembly also includes a medicine adding port opened at the top of the medicine box (9), a sealing plate (52) is fixedly connected to the inner wall of the top of the medicine box (9), the sealing plate (52) is used in conjunction with the second inner slide cylinder (36), the inner thread of the medicine adding port is penetrated by a sealing block (45), the inside of the sealing block (45) is provided with two symmetrically arranged rectangular holes (53), the inside of the rectangular hole (53) is slidably penetrated by a vertical plate (56), and the bottom side of the vertical plate (56) is fixedly connected to a clamping block (5 8), the inner wall of the second inner slide cylinder (36) is provided with two symmetrically arranged slots (59), the slots (59) are engaged with the clamping block (58), two symmetrically arranged second tension springs (57) are fixedly connected between one side of the vertical plate (56) and one side of the rectangular hole (53), the top of the vertical plate (56) is fixedly connected with a baffle (55), the top of the baffle (55) is fixedly connected with an operating block (54), and the outer wall of the sealing block (45) is fixedly sleeved with an operating ring (46); The limiting component comprises two synchronous wheels (22) which are respectively rotatably connected to the inner wall of the top of the expansion tank (1) and fixedly sleeved on the outer wall of the second rotating shaft (29); a screw rod (27) is penetrated through the internal thread of one synchronous wheel (22) away from the second rotating shaft (29); the bottom of the screw rod (27) is fixedly connected to a limiting block (26); the top of the screw rod (27) is fixedly connected to a piston plate (28) extending to the inside of the second inner slide cylinder (36); the inside of the second inner slide cylinder (36) is provided with an electromagnet (61) used in conjunction with the piston plate (28); the bottom of the second rotating shaft (29) is fixedly connected to a third spur gear (24); and the outer wall transmission sleeves of the two synchronous wheels (22) are provided with a same synchronous belt (23).

2. A sulfur autotrophic denitrification base station according to claim 1, characterized in that: The dosing assembly comprises a rotating rod (63) which rotates and passes through the top of the expansion tank (1); the bottom of the rotating rod (63) is fixedly connected to a second truncated cone block (31); the top of the second truncated cone block (31) is fixedly connected to a first cylindrical block (32); the inner wall of the expansion tank (1) is fixedly connected to a first truncated cone block (25); the first truncated cone block (25) is located directly above the second truncated cone block (31); the bottom of the first truncated cone block (25) is fixedly connected to a second cylindrical block (34); the second cylindrical block (34) is located inside the first cylindrical block (32); the outer walls of the second cylindrical block (34) and the first cylindrical block (32) are both provided with a plurality of notches (33); the outer wall of the rotating rod (63) is fixedly sleeved with a fourth spur gear (30); the fourth spur gear (30) is meshed with a plurality of third spur gears (24).

3. A sulfur autotrophic denitrification base station according to claim 2, characterized in that: The top of the expansion tank (1) is fixedly connected to an L-shaped plate (16), the bottom of the L-shaped plate (16) is fixedly connected to a servo motor (15), the output shaft of the servo motor (15) is fixedly connected to a first spur gear (12), and the outer wall of the rotating rod (63) is fixedly sleeved with a second spur gear (13) meshing with the first spur gear (12).

4. A sulfur autotrophic denitrification base station according to claim 3, characterized in that: The top of the expansion tank (1) is fixedly connected to an electromagnetic clutch (62) via a bracket, the output shaft of the electromagnetic clutch (62) is fixedly connected to a first rotating shaft (14), the input shaft of the electromagnetic clutch (62) is fixedly connected to the top of a rotating rod (63), the outer wall of the first rotating shaft (14) is fixedly connected to a push rod (17), the bottom of the push rod (17) is fixedly connected to a first connecting rod (42), the bottom of the first connecting rod (42) is fixedly connected to a push circular plate (41), the push circular plate (41) is used in conjunction with one of the side blocks (43), one side of the two side blocks (43) is fixedly connected to a second connecting rod (47), one side of the second connecting rod (47) is fixedly connected to a rack (44), the top of the medicine box (9) is rotatably connected to a fifth spur gear (48), the fifth spur gear (48) is meshed with the two racks (44).

5. A sulfur autotrophic denitrification base station according to claim 4, characterized in that: The inner wall of the fixed cylinder (8) is provided with two second sliding grooves (38); the outer wall of the inner sliding cylinder (35) is fixedly connected with two symmetrically arranged second sliding blocks (40); the second sliding blocks (40) are slidably connected to the second sliding grooves (38); the inner wall of the inner sliding cylinder (35) is provided with two symmetrically arranged first sliding grooves (37); the outer wall of the inner sliding cylinder (36) is fixedly connected with two symmetrically arranged first sliding blocks (39); the first sliding blocks (39) are slidably connected to the first sliding grooves (37).

6. A sulfur autotrophic denitrification base station according to claim 5, characterized in that: The bottom of the expansion tank (1) is fixedly connected to four symmetrical legs (10), the bottoms of two legs (10) located on the same side are fixedly connected to a common support plate (11), a common second reinforcing rod (21) is fixedly connected between the two legs (10) located on the same side, a support seat (20) is provided on the top of the second reinforcing rod (21) and the support plate (11), the support seat (20) is used to support the water inlet pipe (3) and the circulation pipe (4) of the denitrification system, a common first reinforcing rod (19) is fixedly connected between the two legs (10) close to the lifting pump (6), a mounting plate (18) is fixedly connected to one side of the first reinforcing rod (19), and the mounting plate (18) is fixedly connected to one side of the lifting pump (6).

7. The sulfur autotrophic denitrification process according to any one of claims 1 to 6, characterized in that: The specific steps include: S1, open the inlet valve, use the lifting pump (6) to lift the wastewater to be denitrified from the denitrification system inlet pipe (3), and enter the expansion tank (1) through the second inlet pipe (5) and the first inlet pipe (7). When the expansion tank (1) is filled to 90%, the outlet pipe (2) starts to drain water, close the inlet valve and the outlet valve, open the stop valve, and the wastewater to be denitrified in the expansion tank (1) circulates in a closed loop through the lifting pump (6), the second inlet pipe (5) and the first inlet pipe (7), the expansion tank (1), the outlet pipe (2), and the circulation pipe (4); S2, adding sodium nitrate through the dosing device, the concentration of 100 mg / L in terms of nitrate nitrogen; adding sodium carbonate through the dosing device to control the pH value of the wastewater to be denitrified between 7.0 and 8.5; adding ammonium chloride through the dosing device, the concentration of 1 mg / L in terms of ammonia nitrogen; adding potassium dihydrogen phosphate through the dosing device, the concentration of 0.2 mg / L in terms of phosphorus element; S3, cyclic cultivation, when the nitrate nitrogen removal rate in the wastewater to be denitrified is greater than 3mg / L / h, the immobilized sulfur autotrophic denitrifying bacteria are activated to obtain a culture solution to provide strains for the expansion of sulfur autotrophic denitrifying bacteria, wherein the flow rate of the culture solution is 0.1% of the processing capacity of the supporting denitrification system, and the supporting denitrification system is an upflow sulfur autotrophic denitrification tower with a processing capacity of 1m 3 / h. When the denitrification system operates normally, the hydraulic retention time of the expansion liquid in the expansion tank (1) is 2h.

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