CN214270614U

CN214270614U - Sewage treatment device of ground phosphate rock pellet production system

Info

Publication number: CN214270614U
Application number: CN202023305423.4U
Authority: CN
Inventors: 徐可昇; 徐涛
Original assignee: Yunnan Xuanwei Dongsheng Chemical Co ltd
Current assignee: Yunnan Xuanwei Dongsheng Chemical Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-24
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a sewage treatment device of a ground phosphate rock pellet production system, which comprises a sewage pipe, a sewage tank, a primary treatment tank and a secondary treatment tank, wherein a filter screen is arranged in a communication hole between the sewage tank and the primary treatment tank; the primary treatment tank is divided into a coagulation cavity, a flocculation cavity and a sedimentation cavity by a first partition plate and a second partition plate, the top of the coagulation cavity is provided with a coagulant feeding pipe, the coagulation cavity is internally provided with a first stirring mechanism, the top of the flocculation cavity is provided with a flocculant feeding pipe, the flocculation cavity is internally provided with a second stirring mechanism, the bottom of the sedimentation cavity is provided with a slag discharge conical hopper, the sedimentation cavity is internally provided with at least 2 layers of purification nets and 1 group of inclined tube filtering assemblies from bottom to top in sequence, and the sedimentation cavity is provided with a communicating pipe; the inside in secondary treatment pond is planted and is purified green planting, and aeration components are installed to the bottom in the secondary treatment pond, and the lower part in secondary treatment pond is provided with the drain pipe. The device has the advantages of high purification efficiency, low use cost and strong environmental protection, and can greatly improve the thoroughness of sewage purification.

Description

Sewage treatment device of ground phosphate rock pellet production system

Technical Field

The utility model relates to a phosphorus fertilizer production facility technical field, concretely relates to sewage treatment plant of ground phosphate rock pelletizing production system.

Background

With the increasing exhaustion of high-grade phosphorite, the separation of powdered rock phosphate or the high-grade phosphorite for yellow phosphorus, especially the weathered phosphorite, generates a great amount of powder ore in the processing and using process, the pulverization rate is usually about 20%, some of the powder ore is as high as more than 50%, and in order to avoid the waste of resources, the part of powdered rock phosphate must be prepared into pellets to be used for producing yellow phosphorus. The process for preparing the pellets by the phosphate rock powder comprises the working procedures of material preparation, material mixing, pellet pressing, drying, screening and the like. In the production process of the phosphate rock powder pellets, a large amount of sewage containing phosphorus and acid is generated, and the sewage is directly discharged without being purified, so that the surrounding ecological environment is influenced. In the prior art, sewage in the production process of phosphate rock powder pellets is filtered by a simple grid and then sent to a sewage workshop for yellow phosphorus production to be treated, the sewage treatment process of the yellow phosphorus workshop comprises aeration reaction, precipitation, filter pressing, biodegradation, activated carbon filtration, security filtration and ultrafiltration, and the currently used yellow phosphorus sewage treatment process has good purification effect, but the treatment process is complex and the investment and use cost is too high. Therefore, it is objectively needed to develop a sewage treatment device of a powdered rock phosphate pellet production system, which has the advantages of simple structure, high purification efficiency, strong environmental protection, low use cost and convenient use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sewage treatment plant of ground phosphate rock pelletizing production system of simple structure, purification efficiency height, feature of environmental protection are strong, use cost is low, convenient to use.

The utility model aims at realizing the method, which comprises a sewage pipe, a sewage tank, a primary treatment tank and a secondary treatment tank, wherein the sewage tank is arranged at the upper part of one side of the primary treatment tank, the secondary treatment tank is arranged at the other side of the primary treatment tank, the sewage pipe is arranged at the upper part of the sewage tank, a communicating hole is arranged between the sewage tank and the primary treatment tank, a filter screen is arranged in the communicating hole, the bottom of the sewage tank is arranged into an inclined structure, a slag removing port is arranged at the bottom of the sewage tank, and a sealing plate is movably arranged at the slag removing port;

the first baffle and the second baffle are arranged at intervals in the primary treatment tank, the first baffle and the second baffle are vertically arranged in the primary treatment tank, a communicating channel is reserved between the lower end of the first baffle and the bottom of the primary treatment tank and between the upper end of the second baffle and the top of the primary treatment tank, the first baffle and the second baffle sequentially divide the inner cavity of the primary treatment tank into a coagulation cavity, a flocculation cavity and a sedimentation cavity along the water flow direction, a coagulant feeding pipe is arranged at the top of the coagulation cavity, a first stirring mechanism is arranged in the coagulation cavity, a flocculant feeding pipe is arranged at the top of the flocculation cavity, a first baffle is vertically arranged at one side close to the first baffle at the bottom of the flocculation cavity, a gap is reserved between the first baffle and the top of the flocculation cavity, a second stirring mechanism is arranged in the flocculation cavity between the first baffle and the second baffle, a slag discharge conical hopper is arranged at the bottom of the sedimentation cavity, a slag discharge pipe is arranged at the bottom of the slag discharge cone hopper, a slag discharge valve is installed on the slag discharge pipe, a second baffle plate is vertically arranged at one side, close to a second partition plate, of the top of the sedimentation chamber, a gap is also reserved between the second baffle plate and the bottom of the sedimentation chamber, at least 2 layers of purification nets and 1 group of inclined pipe filtering assemblies are sequentially arranged between the second baffle plate and the inner wall of the sedimentation chamber from bottom to top, a communicating pipe is arranged on the sedimentation chamber on the upper side of each inclined pipe filtering assembly, and manholes are formed in the coagulation chamber, the flocculation chamber and the sedimentation chamber;

the secondary treatment pond is the open structure in upper end, the export of communicating pipe is located the top in secondary treatment pond, the inside in secondary treatment pond is planted and is purified green and plant, aeration component is installed to the bottom in the secondary treatment pond, the lower part in secondary treatment pond is provided with the drain pipe, install water quality testing ware and drain valve along the rivers direction on the drain pipe, the top in thoughtlessly congeal the chamber is provided with the backward flow mouth, be provided with the back flow with the backward flow mouth intercommunication on the drain pipe between water quality testing ware and the drain valve.

Furthermore, a plurality of irradiation lamps are arranged above the secondary treatment tank through a bracket.

Furthermore, a guide plate is arranged above the first baffle plate, and the guide plate is obliquely and downwards arranged along the direction of the second partition plate.

Furthermore, the top of the sedimentation chamber on the upper side of the inclined tube filtering component is provided with a slag removal groove, and a plurality of water leakage holes are uniformly distributed at the bottom of the slag removal groove.

Further, the aeration subassembly includes air pump and aeration pipe, the bottom of aeration pipe in the secondary treatment pond is snakelike arranging, the air pump is installed on the aeration pipe that is located outside the secondary treatment pond, be located the inner wall fixed connection of aeration pipe tip and sedimentation chamber in the secondary treatment pond, and aeration pipe top equipartition in being located the secondary treatment pond is provided with a plurality of aeration mouths, the aeration mouth includes the first joint, the second connects and mounting groove, the lower extreme fixed mounting of first joint is on the aeration pipe, the lower extreme movable mounting of second joint is in the upper end of first joint, mounting groove fixed mounting connects the intercommunication in the upper end of second joint and with the second, the top fixed mounting of mounting groove has the high elastic plate in the middle of the edge is low, processing has a plurality of gas pockets on the elastic plate, fixedly connected with aeration membrane on the upper surface of elastic plate.

Furthermore, an elastic sealing ring is arranged between the first joint and the second joint.

Further, the clean green plants are allium mongolicum regel, loosestrife or reed.

The beneficial effect that this device produced is: firstly, a primary treatment tank is divided into three treatment cavities, namely a coagulation cavity, a flocculation cavity and a sedimentation cavity, so that on one hand, sewage can be ensured to uniformly and continuously flow in the three cavities, on the other hand, corresponding coagulant is added into the coagulation cavity and is stirred by a first stirring mechanism, the sewage enters the flocculation cavity again for flocculation reaction, phosphorus or sulfur in the sewage can form larger floccules under the action of the flocculant, and the larger floccules in the sewage are removed under the filtering action of a purification net and an inclined tube filtering component after the sewage enters the sedimentation cavity, so that the purposes of phosphorus removal and sulfur removal are achieved; the secondary treatment tank is novel in structural design, the sewage is subjected to secondary purification treatment by adopting the purification green plants, and the purification green plants can filter and adsorb odor, harmful substances or excessive nutrient substances in the sewage, so that the secondary treatment tank has the advantages of high purification efficiency, low use cost and strong environmental friendliness; and thirdly, the water quality detector arranged on the drain pipe can monitor and manage the water quality of the sewage, and when the sewage is unqualified in purification, the sewage is sent into the coagulation cavity through the return pipe for secondary purification treatment, so that the thoroughness of sewage purification is improved, better social benefits can be generated, and the water quality detector is easy to popularize and use.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic top view of an aeration assembly;

FIG. 3 is a schematic view of an air nozzle;

in the figure: 1-a sewage pipe, 2-a sewage tank, 3-a primary treatment tank, 4-a secondary treatment tank, 5-a filter screen, 6-a sealing plate, 7-a first partition plate, 8-a second partition plate, 9-a coagulation chamber, 10-a flocculation chamber, 11-a sedimentation chamber, 12-a coagulant feeding pipe, 13-a first stirring mechanism, 14-a first baffle plate, 15-a second stirring mechanism, 16-a slag discharge cone, 17-a slag discharge pipe, 18-a second baffle plate, 19-a purification net, 20-an inclined pipe filtering component, 21-a communicating pipe, 22-a manhole, 23-a purification green plant, 24-a drain pipe, 25-a water quality detector, 26-a drain valve, 27-a return pipe, 28-a lamp, 29-a guide plate and 30-a slag removal groove, 31-an air pump, 32-an aeration pipe, 321-a first joint, 322-a second joint, 323-a mounting groove, 324-an elastic plate, 325-an aeration membrane and 326-an elastic sealing ring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited in any way, and any changes or improvements based on the present invention are all within the protection scope of the present invention.

As shown in figures 1-3, the utility model comprises a sewage pipe 1, a sewage tank 2, a primary treatment tank 3 and a secondary treatment tank 4, wherein the sewage tank 2 is arranged at the upper part of one side of the primary treatment tank 3, the secondary treatment tank 4 is arranged at the other side of the primary treatment tank 3,

the sewage pipe 1 sets up the upper portion at effluent water sump 2, be provided with the intercommunicating pore between effluent water sump 2 and the primary treatment pond 3, install filter screen 5 in the intercommunicating pore, the structure of tilting is set to the bottom of effluent water sump 2, and the sloping structure is designed into to the bottom of effluent water sump 2, and the collection of dross in the sewage of being convenient for discharges, the bottom of effluent water sump 2 is provided with the scarfing cinder mouth, and the activity of scarfing cinder mouth department is provided with closing plate 6, regularly opens closing plate 6, just can clear away the dross of bottom of the pool totally.

A first clapboard 7 and a second clapboard 8 are arranged in the primary treatment tank 3 at intervals, the first clapboard 7 and the second clapboard 8 are vertically arranged in the primary treatment tank 3, a communicating channel is reserved between the lower end of the first clapboard 7 and the bottom of the primary treatment tank 3 and between the upper end of the second clapboard 8 and the top of the primary treatment tank 3, the inner cavity of the primary treatment tank 3 is sequentially divided into a coagulation cavity 9, a flocculation cavity 10 and a sedimentation cavity 11 along the water flow direction by the first clapboard 7 and the second clapboard 8, a coagulant feeding pipe 12 is arranged at the top of the coagulation cavity 9, a first stirring mechanism 13 is arranged in the coagulation cavity 9, the first stirring mechanism 13 can adopt a structure used in the prior art, a flocculant feeding pipe is arranged at the top of the flocculation cavity 10, a first baffle 14 is vertically arranged at one side close to the first clapboard 7 at the bottom of the flocculation cavity 10, a gap is reserved between the top of the first baffle 14 and the top of the flocculation cavity 10, a second stirring mechanism 15 is arranged in the flocculation cavity 10 between the first baffle 14 and the second baffle 8, the second stirring mechanism 15 adopts a structure used in the prior art, a slag discharge cone hopper 16 is arranged at the bottom of the sedimentation cavity 11, a slag discharge pipe 17 is arranged at the bottom of the slag discharge cone hopper 16, a slag discharge valve is installed on the slag discharge pipe 17, a second baffle 18 is vertically arranged at one side of the top of the sedimentation cavity 11 close to the second baffle 8, a gap is also reserved between the second baffle 18 and the bottom of the sedimentation cavity 11, at least 2 layers of purification nets 19 and 1 group of inclined pipe filter assemblies 20 are sequentially arranged between the second baffle 18 and the inner wall of the sedimentation cavity 11 from bottom to top, the inclined pipe filter assemblies 20 are the prior art, a communicating pipe 21 is arranged on the sedimentation cavity 11 at the upper side of the inclined pipe filter assemblies 20, the coagulation cavity 9, the flocculation cavity 10 and the sedimentation cavity 11 are all provided with manholes 22, the inside of the coagulation cavity 9, the flocculation cavity 10 and the sedimentation cavity 11 can be accessed through the manholes 22, the internal parts of the primary treatment tank 3 are replaced or cleaned, the primary treatment tank 3 is divided into three treatment cavities, namely a coagulation cavity 9, a flocculation cavity 10 and a sedimentation cavity 11, on one hand, the sewage can be ensured to uniformly and continuously flow in the three cavities, on the other hand, after a corresponding flocculating agent is added into the coagulation cavity 9 and is stirred by a first stirring mechanism 13, the sewage enters the flocculation cavity 10 again for flocculation reaction, under the action of the flocculating agent, phosphorus element or sulfur element in the sewage can form larger flocculating constituent, so that after the sewage enters the sedimentation cavity 11, under the filtering action of the purification net 19 and the inclined tube filtering component 20, larger floccules in the sewage are removed, thereby achieving the purposes of phosphorus removal and sulfur removal.

The secondary treatment pond 4 is the open structure in upper end, the export of communicating pipe 21 is located the top in secondary treatment pond 4, the inside in secondary treatment pond 4 is planted and is purified green plant 23, aeration component is installed to the bottom in secondary treatment pond 4, the lower part in secondary treatment pond 4 is provided with drain pipe 24, install water quality detector 25 and drain valve 26 along the water flow direction on the drain pipe 24, the top of coagulating chamber 9 is provided with the backward flow mouth, be provided with the back flow 27 with the backward flow mouth intercommunication on the drain pipe 24 between water quality detector 25 and the drain valve 26, the structural design novelty of secondary treatment pond 4 adopts and purifies green plant 23 and carries out purification treatment once more to sewage, purifies green plant 23 and can filter the odor in the sewage, harmful substance or surplus nutrient substance, has purification efficiency height, use cost low, The advantage that the feature of environmental protection is strong, preferably, purify green 23 of planting and be water shallot, loosestrife or reed, and the water quality testing appearance 15 that sets up on drain pipe 24 can carry out water quality monitoring management to sewage, when sewage purification is unqualified, send into sewage through back flow 27 and carry out purification treatment once more in coagulating chamber 9, improved sewage purification's thoroughness.

In the working process of the device, sewage generated in the production process of the phosphorite powder pellets enters a sewage tank 2 through a sewage pipe 1, after being intercepted by a filter screen 5, scum in the sewage is gathered at the bottom of the sewage tank 2, the sewage after primary filtration enters a coagulation cavity 9, at the moment, more than two coagulants are added through a coagulant feeding pipe 12, different coagulants can be simultaneously added through the coagulant feeding pipe 12, the obtained mixture is stirred by using a first stirring mechanism 13, suspended particles in the sewage are rapidly mixed with the coagulants, particles are destabilized by neutralizing negative charges on the surfaces of the particles to form small flocs, and then the small flocs enter a flocculation cavity 10, and simultaneously phosphorus, sulfur and the coagulants in raw water react to form phosphate so as to achieve the purposes of chemical phosphorus and sulfur removal, after the raw water enters the flocculation cavity 10, a flocculating agent is added through a flocculating agent feeding pipe to promote the entering small flocs to adsorb the small flocs through adsorption, The electric neutralization and the mutual bridging effect form bigger flocs, the action of the slow second stirring mechanism 15 enables the flocculating agent and the flocs to be fully mixed without destroying the formed big flocs, the flocculated sewage enters the sedimentation cavity 11, after being filtered by the purification net 19 and the inclined tube filtering component 20, the big floc sedimentation purification net 16 slides down on the bottom surface under the action of gravity and falls into the slag discharge conical hopper 16 to be periodically discharged from the slag discharge pipe 17, the sewage from which the flocs are removed enters the secondary treatment tank 4 through the communicating pipe 21, after the aeration of the aeration component and the purification adsorption of the purification green plants 23, the odor, harmful substances or excess nutrient substances in the sewage can be thoroughly removed, the purpose of purifying the sewage is achieved, the purified water purified by the purification green plants 23 is discharged from the water discharge pipe 24 to be reused, the water quality detector 15 arranged on the water discharge pipe 24 can monitor and manage the sewage quality, when the sewage purification is unqualified, the sewage is sent into the coagulation cavity 9 through the return pipe 27 for secondary purification treatment, so as to ensure the purification treatment effect of the sewage.

In order to improve the purification effect of purifying the green plants 23, a plurality of irradiation lamps 28 are installed above the secondary treatment tank 4 through a bracket, and the irradiation lamps 28 can emit light sources, which is beneficial to improving the purification efficiency of purifying the green plants 23.

Further, a guide plate 29 is arranged above the first baffle plate 14, the guide plate 29 is arranged obliquely downwards along the direction of the second partition plate 8, and the guide plate 29 can prolong the water flow path from the coagulation chamber 9 to the flocculation chamber 10, so that the water flow slowly and stably enters the flocculation chamber 10.

Further, 11 tops of sedimentation chamber of pipe chute filtering component 20 upside are provided with slagging-off recess 30, the bottom equipartition of slagging-off recess 30 is provided with a plurality of holes that leak, and pipe chute filtering component 20 filters the in-process of sewage, probably can contain the flocculating constituent in the sewage, can carry out further filtration to the flocculating constituent through slagging-off recess 30 to improve the purifying effect in secondary treatment pond 4.

Further, the aeration assembly comprises an air pump 31 and aeration pipes 32, the bottom of the aeration pipe 32 in the secondary treatment tank 4 is arranged in a snake shape, the air pump 31 is installed on the aeration pipe 32 outside the secondary treatment tank 4, the end part of the aeration pipe 32 in the secondary treatment tank 4 is fixedly connected with the inner wall of the sedimentation chamber 11, a plurality of aeration nozzles are uniformly distributed at the top of the aeration pipe 32 in the secondary treatment tank 4, air can be introduced into the aeration pipe 32 by using the air pump 31 and then enters into each aeration nozzle from the aeration pipe 32, the arranged aeration pipe 32 is arranged in an S shape, the aeration pipe 32 can fully utilize the use space in the secondary treatment tank 4, the area for arranging the aeration pipe 32 in the secondary treatment tank 4 is increased, the number of the aeration nozzles is effectively increased, and the speed of aeration and purification treatment on sewage can be increased, namely, the sewage can be sufficiently stirred rapidly and uniformly by the aeration nozzle, the speed of aeration purification treatment of the device is increased, the aeration nozzle comprises a first connector 321, a second connector 322 and a mounting groove 323, the lower end of the first connector 321 is fixedly arranged on the aeration pipe 32, the lower end of the second connector 322 is movably arranged at the upper end of the first connector 321, the mounting groove 323 is fixedly arranged at the upper end of the second connector 322 and is communicated with the second connector 322, the top of the mounting groove 323 is fixedly provided with an elastic plate 324 with a low edge and a high middle part, a plurality of air holes are processed on the elastic plate 324, an aeration membrane 325 is fixedly connected on the upper surface of the elastic plate 324, when air enters the mounting groove 323 through the first connector 321 and the second connector 322, the air can contact the elastic plate 324, and then the air contacts the aeration membrane 325 through the plurality of air holes, the air can pass through a plurality of micropores on the aeration membrane 325 to can form vertical annular air current in secondary treatment pond 4, reach the effect to the sewage stirring, at this in-process, the elastic plate 324 can resist the impact force that partly comes from the air effectively, and then can reduce the impact of air to aeration membrane 325, can reduce the damage of air to aeration membrane 325 effectively.

Furthermore, an elastic sealing ring 326 is installed between the first joint 321 and the second joint 322, and the sealing performance between the first joint 321 and the second joint 322 can be ensured through the elastic sealing ring 326, so that the influence of air leakage on the sewage aeration effect can be avoided.

Claims

1. A sewage treatment device of a ground phosphate rock pellet production system is characterized by comprising a sewage pipe (1), a sewage tank (2), a primary treatment tank (3) and a secondary treatment tank (4), wherein the sewage tank (2) is arranged at the upper part of one side of the primary treatment tank (3), the secondary treatment tank (4) is arranged at the other side of the primary treatment tank (3),

the sewage pipe (1) is arranged at the upper part of the sewage tank (2), a communicating hole is formed between the sewage tank (2) and the primary treatment tank (3), a filter screen (5) is arranged in the communicating hole, the bottom of the sewage tank (2) is arranged into an inclined structure, a slag removing opening is formed in the bottom of the sewage tank (2), and a sealing plate (6) is movably arranged at the slag removing opening;

the device is characterized in that a first clapboard (7) and a second clapboard (8) are arranged in the primary treatment tank (3) at intervals, the first clapboard (7) and the second clapboard (8) are vertically arranged in the primary treatment tank (3), communicating channels are reserved between the lower end of the first clapboard (7) and the bottom of the primary treatment tank (3) and between the upper end of the second clapboard (8) and the top of the primary treatment tank (3), the first clapboard (7) and the second clapboard (8) sequentially divide the inner cavity of the primary treatment tank (3) into a coagulation cavity (9), a flocculation cavity (10) and a sedimentation cavity (11) along the water flow direction, a coagulant feeding pipe (12) is arranged at the top of the coagulation cavity (9), a first stirring mechanism (13) is arranged in the coagulation cavity (9), a flocculant feeding pipe is arranged at the top of the flocculation cavity (10), and a first baffle (14) is vertically arranged at one side close to the first clapboard (7) at the bottom of the flocculation cavity (10), leave the clearance between the top of first baffle (14) and flocculation chamber (10), be provided with second rabbling mechanism (15) in flocculation chamber (10) between first baffle (14) and second baffle (8), the bottom of sedimentation chamber (11) is provided with row sediment awl fill (16), the bottom of row sediment awl fill (16) is provided with row sediment pipe (17), install the sediment valve on row sediment pipe (17), the top of sedimentation chamber (11) is provided with second baffle (18) in one side vertical near second baffle (8), also leave the clearance between the bottom of second baffle (18) and sedimentation chamber (11), from the bottom up has set gradually 2 at least two-layer purification net (19) and 1 group pipe chute filtering component (20) between the inner wall of second baffle (18) and sedimentation chamber (11), be provided with communicating pipe (21) on sedimentation chamber (11) of pipe filtering component (20) upside, manholes (22) are formed in the coagulation cavity (9), the flocculation cavity (10) and the sedimentation cavity (11);

the secondary treatment pond (4) are the open structure in upper end, the export of communicating pipe (21) is located the top in secondary treatment pond (4), the inside of secondary treatment pond (4) is planted and is purified green planting (23), aeration subassembly is installed to the bottom in secondary treatment pond (4), the lower part in secondary treatment pond (4) is provided with drain pipe (24), install water quality testing ware (25) and drain valve (26) along the rivers direction on drain pipe (24), the top of coagulating basin (9) is provided with the backward flow mouth, be provided with on drain pipe (24) between water quality testing ware (25) and drain valve (26) back flow (27) with the backward flow mouth intercommunication.

2. The sewage treatment device of the phosphate rock powder pellet production system as claimed in claim 1, wherein a plurality of irradiation lamps (28) are mounted above the secondary treatment tank (4) through a bracket.

3. The sewage treatment device of the phosphate rock powder pellet production system as claimed in claim 1, wherein a guide plate (29) is arranged above the first baffle plate (14), and the guide plate (29) is obliquely and downwardly arranged along the direction of the second partition plate (8).

4. The sewage treatment device of the phosphate rock powder pellet production system as claimed in claim 1, wherein a deslagging groove (30) is formed in the top of the settling chamber (11) on the upper side of the inclined tube filtering component (20), and a plurality of water leakage holes are uniformly formed in the bottom of the deslagging groove (30).

5. The sewage treatment device of the phosphate rock powder pellet production system as claimed in claim 1, wherein the aeration assembly comprises an air pump (31) and an aeration pipe (32), the bottom of the aeration pipe (32) in the secondary treatment tank (4) is arranged in a serpentine shape, the air pump (31) is installed on the aeration pipe (32) outside the secondary treatment tank (4), the end part of the aeration pipe (32) inside the secondary treatment tank (4) is fixedly connected with the inner wall of the sedimentation chamber (11), a plurality of aeration nozzles are uniformly distributed on the top of the aeration pipe (32) inside the secondary treatment tank (4), each aeration nozzle comprises a first connector (321), a second connector (322) and an installation groove (323), the lower end of the first connector (321) is fixedly installed on the aeration pipe (32), the lower end of the second connector (322) is movably installed at the upper end of the first connector (321), the mounting groove (323) is fixedly mounted at the upper end of the second connector (322) and communicated with the second connector (322), the top of the mounting groove (323) is fixedly mounted with an elastic plate (324) with a low edge and a high middle, a plurality of air holes are processed on the elastic plate (324), and an aeration membrane (325) is fixedly connected to the upper surface of the elastic plate (324).

6. The sewage treatment device of the phosphate rock powder pellet production system as claimed in claim 5, wherein an elastic sealing ring (326) is arranged between the first joint (321) and the second joint (322).

7. The sewage treatment device of the ground phosphate rock pellet production system as claimed in claim 1, wherein the purification green plants (23) are allium mongolicum regel, loosestrife or reed.