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CN-122016605-A - Experimental device and method for measuring phosphorus removal performance of adsorbent under continuous flow working condition

CN122016605ACN 122016605 ACN122016605 ACN 122016605ACN-122016605-A

Abstract

The application relates to an experimental device and a method for measuring the phosphorus removal performance of an adsorbent under a continuous flow working condition, wherein the experimental device comprises a primary sedimentation tank, a filtering column, a phosphorus removal tank, a magnetizing secondary sedimentation tank and the like, peristaltic pumps, driving motors, water pumps and the like are arranged, a magnetic particle recovery mechanism and the like are arranged, la-ATP/SA particles and powdery LaFeO-U composite materials are also used as adsorbents, and the experimental method comprises the steps of pretreatment, adsorption and phosphorus removal of the powdery phosphorus removal adsorbents, adsorption and phosphorus removal of the granular phosphorus removal adsorbents and the like, and sampling points are arranged at a plurality of positions. The application achieves the effects of measuring the dynamic adsorption performance of the powdery and granular dephosphorization adsorbents under the continuous flow working condition, separating the magnetic powder adsorbent to reduce secondary pollution, recycling the adsorbent to reduce resource waste, accurately calculating the pollutant removal rate of each link, and the like.

Inventors

  • WANG SHENGRUI
  • LIU SHUAI
  • NI ZHAOKUI
  • CHEN ZHAOYING
  • FAN FUQIANG

Assignees

  • 北京师范大学珠海校区

Dates

Publication Date
20260512
Application Date
20260318

Claims (9)

  1. 1. An experimental device for determining the dephosphorization performance of an adsorbent under a continuous flow working condition is characterized in that the experimental device comprises a primary sedimentation tank (1), a water inlet pipe (11) and a water outlet pipe (12) are connected to the primary sedimentation tank (1), a blow-down pipe (13) is arranged at the bottom of the primary sedimentation tank (1), the water inlet pipe (11) is connected with an intensive fishpond, a peristaltic pump (5) is connected to the water outlet pipe (12), a first branch pipe (51) is connected to the connection position of the water outlet pipe (12) and the peristaltic pump (5), a filter column (2) is connected to the first branch pipe (51), attapulgite particles are arranged in the filter column (2), suspended solids in tail water of the filter column (2) are connected with a water guide pipe (21), a dephosphorization tank (3) is connected to the water guide pipe (21), a driving motor (31) is fixedly connected to the top of the dephosphorization tank (3), an output shaft of the driving motor (31) extends into the dephosphorization tank (3) and is fixedly connected with a stirring shaft (32), a magnetic return pipe (42) is fixedly connected to the top of the second sedimentation tank (4), a magnetic particle recovery mechanism (42) is arranged at the top of the second sedimentation tank (4), the bottom of the magnetizing secondary sedimentation tank (4) is provided with a circulating pipe (41), one end of the circulating pipe (41) far away from the magnetizing secondary sedimentation tank (4) extends into the dephosphorization tank (3), and the circulating pipe (41) is provided with a water pump (411).
  2. 2. The experimental device for determining the dephosphorization performance of the adsorbent under the continuous flow working condition according to claim 1, wherein the peristaltic pump (5) is connected with a second branch pipe (52), a fixed bed adsorption column (7) is fixedly connected to the second branch pipe (52), a granular dephosphorization adsorbent is arranged in the fixed bed adsorption column (7), and a second return pipe (71) is arranged on the fixed bed adsorption column (7).
  3. 3. The experimental device for determining the dephosphorization performance of an adsorbent under a continuous flow working condition according to claim 2, wherein the granular dephosphorization adsorbent is 200mlLa-ATP/SA granules, and the magnetized powdery adsorbent is powdery LaFeO-U composite material.
  4. 4. The experimental device for determining the dephosphorization performance of the adsorbent under the continuous flow working condition according to claim 1, wherein the magnetic particle recovery mechanism (6) comprises a recovery sleeve (61) fixedly connected in the magnetizing secondary sedimentation tank (4), a power motor (62) is fixedly connected to the top of the magnetizing secondary sedimentation tank (4), a screw (63) is fixedly connected to an output shaft of the power motor (62), the screw (63) extends into the recovery sleeve (61), the screw (63) is rotationally connected with the recovery sleeve (61), a first permanent magnet (64) is connected to the screw (63) in a threaded mode, and the diameter of the first permanent magnet (64) is identical to the inner diameter of the recovery sleeve (61).
  5. 5. The experimental device for determining the dephosphorization performance of the adsorbent under the continuous flow working condition according to claim 4, wherein the top of the recovery sleeve (61) is sleeved with a scraping ring (65), one side of the scraping ring (65) close to the recovery sleeve (61) is provided with a second permanent magnet (651), and the magnetized secondary sedimentation tank (4) is provided with a positioning assembly (66) for fixing the scraping ring (65).
  6. 6. The experimental device for determining the dephosphorization performance of the adsorbent under the continuous flow working condition according to claim 5, wherein the positioning assembly (66) comprises a positioning rod (661) fixedly connected to the magnetized secondary sedimentation tank (4), two guide posts (662) are fixedly connected in the positioning rod (661), the guide posts (662) are horizontally arranged, a clamping hook (663) is slidingly connected on the guide posts (662), the clamping hook (663) is used for being abutted and supported at the bottom of the scraping ring (65), the clamping hook (663) is made of ferromagnetic materials, an electromagnet (664) is fixedly connected in the positioning rod (661), a reset spring (665) is fixedly connected at the bottom of the clamping hook (663), and one end, far away from the clamping hook (663), of the reset spring (665) is fixedly connected to the positioning rod (661).
  7. 7. The experimental device for determining the dephosphorization performance of the adsorbent under the continuous flow working condition according to claim 4, wherein a collecting cylinder (67) is arranged at the bottom of the collecting sleeve (61), a sponge (671) is arranged at the bottom of the collecting cylinder (67), a guide ring (672) is integrally formed at the top of the collecting cylinder (67), the inner diameter of the guide ring (672) is sequentially reduced from top to bottom, the top of the guide ring (672) is abutted to the inner wall of the magnetizing secondary sedimentation tank (4), a plurality of yielding ports (673) are formed in the top of the guide ring (672) along the circumferential direction of the guide ring, a spiral feeding piece (675) is fixedly connected to the collecting cylinder (67), a third permanent magnet (676) is fixedly connected to the inner wall of the collecting cylinder (674), a driving first permanent magnet (64) is arranged at the bottom of the collecting sleeve (61), and a circulating pipe (41) is fixedly connected to the bottom of the collecting cylinder (67).
  8. 8. The experimental device for determining the dephosphorization performance of the adsorbent under the continuous flow working condition according to claim 7, wherein the guide assembly (68) comprises a plurality of limit strips (681) fixedly connected to the inner side wall of the recovery sleeve (61), guide grooves (682) are formed between the adjacent limit strips (681), guide blocks (683) are fixedly connected to the side wall of the first permanent magnet (64), the guide blocks (683) are slidingly connected to the guide grooves (682), a gap is reserved between the limit strips (681) and the bottom of the recovery sleeve (61), the gap is larger than the height of the first permanent magnet (64), guide inclined surfaces (684) are formed at positions, close to the bottom, of the limit strips (681), of the recovery sleeve (61) are fixedly connected with homing springs (685), and threads are not formed at parts, close to the gap, of the screw rods (63).
  9. 9. The test method of the experimental device for determining the dephosphorization performance of the adsorbent under the continuous flow working condition comprises the following steps: S1, pretreatment, namely guiding the fishpond tail water into a primary sedimentation tank (1), and utilizing the gravity sedimentation principle, wherein particles with the particle size of more than 100 mu m in the water can be naturally precipitated, so that the primary filtration of the fishpond tail water is realized; The water inlet pipe (11) of the primary sedimentation tank (1) is provided with a first sampling point which is used as a water inlet end, so that the initial phosphorus concentration of the inlet water can be obtained and used as a reference for experiments; A second sampling point is arranged on a water outlet pipe (12) of the primary sedimentation tank (1), the second sampling point is used for acquiring the phosphorus concentration of the water treated by the primary sedimentation tank (1), the second sampling point is mainly used for judging the phosphorus removal effect of the primary sedimentation tank (1), the primary sedimentation tank (1) mainly plays a role in removing suspended matters, but a small amount of phosphorus can be removed through the adsorption effect of the suspended matters, and the data can help you to eliminate the interference of the phosphorus removal effect of the primary sedimentation tank (1) on the measurement of the performance of the adsorbent; S2, adsorbing and dephosphorizing by using a powdery dephosphorizing adsorbent, namely passing fish pond tail water precipitated in the primary sedimentation tank (1) through the powdery dephosphorizing adsorbent (magnetic LaFeO-U composite material): A1, filtering suspended particles by using attapulgite particles with the particle size of 1-2mm as a core filter material in a bed layer of the filtering column (2), and respectively filling glass bead layers with the thickness of 2cm at two ends, so that fine suspended particles can be effectively trapped, and partial phosphorus and nitrogen pollutants can be synchronously removed; The sampling point III is arranged behind the filter column (2), so that the data of the concentration of phosphorus and nitrogen in filtered water, the content of suspended solids and the like can be obtained, the data is compared with the water inlet index of the filter column (2), the removal rate of the filter column (2) to various pollutants can be accurately calculated, whether the attapulgite filter material still has good adsorption and purification capacity can be judged, and meanwhile, whether the interception effect of the glass bead layer reaches the standard can be known; a2, the dephosphorization pool (3) adsorbs dephosphorization, namely adding a magnetic LaFeO-U composite material into the dephosphorization pool (3), wherein the magnetic LaFeO-U composite material depends on the adsorption effect of the magnetic LaFeO-U composite material or the chemical precipitation effect generated by phosphorus, a driving motor (31) drives a stirring shaft (32) to rotate, the stirring shaft (32) can break the standing layering state of the wastewater, so that the magnetic powder can be uniformly dispersed in the wastewater, and the magnetic powder is prevented from settling at the bottom of the pool and cannot fully contact with the phosphorus in the wastewater, thereby greatly improving the dephosphorization efficiency of the magnetic powder; A3, recovering and reutilizing the magnetic particles remained in the water, wherein the magnetic particles fall to the bottom of the magnetic secondary sedimentation tank (4) under the action of gravity, the residual magnetic particles are attached to the outer side wall of the recovery sleeve (61) under the adsorption of the first permanent magnet (64), the scraping ring (65) scrapes the magnetic particles with large outer side wall of the recovery sleeve (61), the magnetic particles are collected on the spiral feeding sheet (675), the first permanent magnet (64) drives the spiral feeding sheet (675) to rotate, the magnetic particles are pushed to the circulating pipe (41), and the circulating pipe (41) guides the magnetic particles into the dephosphorization tank (3) to realize the recycling of materials; The fourth magnetizing secondary sedimentation tank (4) has the advantages that the fourth sampling point can be used for detecting the final effluent quality after the dephosphorization treatment, detecting indexes such as phosphorus concentration, nitrogen concentration and suspended matter content, directly confirming whether the water quality after the treatment meets the corresponding effluent requirement, and finally verifying the treatment effect of the whole dephosphorization flow; S3, adsorbing and dephosphorizing by using a granular dephosphorizing adsorbent, namely passing fish pond tail water precipitated in the primary sedimentation tank (1) through an La-ATP/SA (spherical granular adsorbent) adsorbing material: 1, filtering and dephosphorizing La-ATP/SA particles with the functions of filtering and high-efficiency dephosphorizing, directly filling the La-ATP/SA particles serving as filter materials into a special adsorption column, filling glass bead layers with the thickness of 2cm at two ends of a bed layer, ensuring uniform water distribution by the glass bead layers, preventing filter materials from scattering, guiding water on a water outlet pipe (12) of a primary sedimentation tank (1) into the fixed bed adsorption column (7), and enabling the La-ATP/SA particles to play roles of absorbing and dephosphorizing and filtering suspended solids; and a2, setting a sampling point five on the second water return pipe, wherein the sampling point five can directly reflect the adsorption treatment capacity of La-ATP/SA particles on phosphorus, detect the total phosphorus and the concentration of soluble phosphorus in a water sample, and then compare with a water inlet data sampling point two of an adsorption column to obtain the dephosphorization removal rate of La-ATP/SA particles.

Description

Experimental device and method for measuring phosphorus removal performance of adsorbent under continuous flow working condition Technical Field The application relates to the technical field of water body adsorption dephosphorization, in particular to an experimental device and method for measuring the dephosphorization performance of an adsorbent under a continuous flow working condition. Background The eutrophication of water is a serious water environment problem facing the current global scope, phosphorus is used as a limiting nutrient element of the eutrophication of water, excessive discharge of the phosphorus can directly cause a series of environmental problems such as abnormal proliferation of algae, reduction of dissolved oxygen of water, unbalance of aquatic ecosystem and the like, and the safety and ecological health of drinking water are seriously threatened, so that the development of efficient, stable and economic water phosphorus removal technology has become a research focus and industrial application in the field of water environment treatment. The adsorption dephosphorization technology has the technical advantages of low cost, simple and convenient operation, high treatment efficiency and no secondary pollution, and becomes one of the main technical directions in the current water dephosphorization field. The core principle of the technology is that phosphate ions in the water body are fixed on the surface of the adsorbent by utilizing the adsorbent material with high porosity and large specific surface area through electrostatic interaction, ligand exchange, surface complexation, precipitation reaction and other action mechanisms, so that the efficient removal of phosphorus in the water body is realized. At present, more results are obtained aiming at the related research of the dephosphorization adsorbent, in the prior art, researchers develop a large number of analyses under the static adsorption working conditions of laboratories around the contents of adsorption efficiency, dephosphorization mechanism, influencing factors and the like of the powdery and granular dephosphorization adsorbent, and the action rules of factors such as physical and chemical properties of the adsorbent, pH value of water, initial concentration of phosphorus, reaction temperature and the like on the static adsorption effect are clarified. However, most of the existing researches focus on laboratory static adsorption working conditions, and the researches on continuous flow treatment scenes are seriously insufficient, so that the key parameters such as mass transfer parameters, dynamic adsorption dynamics characteristics, long-term operation adsorbent performance attenuation rules and the like under the continuous flow working conditions are obviously lacking, and especially the researches on dynamic adsorption under the conditions of actual water environments such as complex water quality environments of natural surface water, domestic sewage tail water and the like, and larger treatment scale and longer operation period are lacking. Meanwhile, as the requirements of water eutrophication treatment are continuously improved, the requirements of different application scenes (such as landscape water restoration, municipal sewage advanced treatment, pretreatment of drinking water sources and the like) on the treatment efficiency, the operation stability and the material service life of the dephosphorization technology are diversified, and the key problems of breaking through the bottleneck of the prior art, improving the water quality purification efficiency and promoting the industrialization of the adsorption dephosphorization technology are solved by developing the adsorption dephosphorization technology adapting to the continuous flow working condition and fully excavating the dynamic adsorption dephosphorization efficiency of the adsorption material. Based on the above-mentioned current situation, it is needed to develop an experimental device capable of simulating the actual continuous flow working condition, which is used for carrying out the dynamic adsorption performance measurement of the dephosphorization adsorbent, and providing data support and technical basis for the engineering application of the adsorption dephosphorization material. Disclosure of Invention In order to simulate the dynamic adsorption performance measurement of the dephosphorization adsorbent under the actual continuous flow working condition, the application provides an experimental device for the dephosphorization performance measurement of the adsorbent under the continuous flow working condition. The experimental device for determining the dephosphorization performance of the adsorbent under the continuous flow working condition provided by the application adopts the following technical scheme: The experimental device for determining the dephosphorization performance of the adsorbent under the continuous flow working conditi