CN117303529A - Preparation method of dephosphorizing agent for sewage treatment - Google Patents
Preparation method of dephosphorizing agent for sewage treatment Download PDFInfo
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- CN117303529A CN117303529A CN202311503201.9A CN202311503201A CN117303529A CN 117303529 A CN117303529 A CN 117303529A CN 202311503201 A CN202311503201 A CN 202311503201A CN 117303529 A CN117303529 A CN 117303529A
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- heating pipe
- heating
- plant raw
- pipe
- raw materials
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- 239000010865 sewage Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 124
- 239000002994 raw material Substances 0.000 claims abstract description 63
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 18
- 150000003839 salts Chemical class 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000007873 sieving Methods 0.000 claims abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 241000196324 Embryophyta Species 0.000 claims description 58
- 239000010902 straw Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 8
- 244000068988 Glycine max Species 0.000 claims description 4
- 235000010469 Glycine max Nutrition 0.000 claims description 4
- 240000007594 Oryza sativa Species 0.000 claims description 4
- 235000007164 Oryza sativa Nutrition 0.000 claims description 4
- 240000008042 Zea mays Species 0.000 claims description 4
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims description 4
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 235000005822 corn Nutrition 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- 235000009566 rice Nutrition 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 abstract 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 4
- 159000000007 calcium salts Chemical class 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 4
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 4
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention is applicable to the field of preparation of dephosphorization agents, and provides a preparation method of a dephosphorization agent for sewage treatment, which comprises the following steps: step (1): respectively placing plant raw materials into each heating pipe for drying; step (II): starting a driving mechanism in the shell while drying the plant raw materials; step (III): heating plant raw materials to 600-700 ℃ in a tube furnace filled with nitrogen; step (IV): placing ferric salt, aluminum salt or a mixture of the ferric salt and the aluminum salt in an oven for heat preservation, grinding and sieving for standby; step (five): mixing the grinded ferric salt, aluminum salt or the mixture of the ferric salt and the aluminum salt with biochar according to the weight ratio of 20-50:60-80. A preparation method of a dephosphorizing agent for sewage treatment drives plant raw materials to collide in a heating pipe by the heating pipe, so that hot air in the heating pipe conveniently enters the plant raw materials.
Description
Technical Field
The invention belongs to the field of preparation of phosphorus removal agents, and particularly relates to a preparation method of a phosphorus removal agent for sewage treatment.
Background
The dephosphorizing agent is an article for coagulating and removing turbidity and phosphorus of urban source water. The dephosphorizing agent can achieve the purpose of deep dephosphorization while carrying out coagulation and turbidity removal on urban water source water.
The prior publication No. CN114713190 is a sewage dephosphorizing agent and a preparation method thereof, wherein the dephosphorizing agent consists of modified gypsum and biochar, and the raw material of the biochar is plant raw material. The plant raw materials are washed and dried by deionized water, pyrolyzed by adopting an oxygen limiting heating carbonization method, and then ground into powder for standby. And (3) preserving the heat of the natural gypsum in an oven, grinding after natural cooling, and sieving. Mixing 30-60% gypsum and 70-40% biochar, and obtaining the dephosphorizing agent.
In the scheme, the plant raw materials are selected from one or more of rice straw, corn straw and soybean straw, the raw materials are required to be washed and then heated for 12 hours at 50 ℃ to be completely dried, and in the drying process, as the straw is of a column-shaped structure, the straw shell has certain hardness, so that the interior of the straw is heated slowly during heating, and the appearance of the straw is easy to carbonize in advance when the drying temperature is too high, so that the subsequent processing treatment is influenced; and when the drying temperature is too low, the heating is needed for a long time, so that the inside and outside of the straw are completely dried, and the heating efficiency is low.
Secondly, modified gypsum is selected to be mainly added with calcium salt, the calcium salt has a certain dephosphorization effect, but with the continuous improvement of urban sewage discharge index requirements, in order to further remove total phosphorus in sewage, the pH value of the sewage is increased by excessively adding the calcium salt, the sludge yield is increased, and the sewage treatment cost is continuously increased.
To avoid the above-mentioned problems, it is necessary to provide a method for preparing a dephosphorizing agent for sewage treatment to overcome the drawbacks of the prior art.
Disclosure of Invention
The invention aims to provide a preparation method of a dephosphorizing agent for sewage treatment, which aims to solve the problems of longer drying and heating time of straw raw materials, lower heating efficiency, limited dephosphorizing effect of calcium salt and the use of the prior sewage dephosphorizing agent.
The invention is realized in such a way that the preparation method of the dephosphorizing agent for sewage treatment comprises the following steps:
step (1): washing and collecting plant raw materials with deionized water, then opening an end cover on a shell, wherein an annular sleeve is fixedly connected in the shell, a plurality of heating pipes are rotatably connected on the inner end surface of the annular sleeve, a screen plate is arranged at the bottom of each heating pipe, the plant raw materials are respectively put into each heating pipe in the annular sleeve, and the plant raw materials are dried in the heating pipes for 3 hours;
step (II): the method comprises the steps that when plant raw materials are dried, a driving mechanism in a shell is started, and the driving mechanism can drive all heating pipes to rotate in a reciprocating mode at the same time, the heating pipes break the pipe walls of the straw and simultaneously throw out water in the plant raw materials; simultaneously, an air suction mechanism at the bottom of the heating pipe guides out air in the heating pipe;
step (III): taking out the dried plant raw materials from the heating pipe, and then heating the plant raw materials to 600-700 ℃ in a tube furnace filled with nitrogen at a heating rate of 25-30 ℃/min to obtain the required biochar;
step (IV): placing ferric salt, aluminum salt or a mixture of the ferric salt and the aluminum salt in a baking oven at 110 ℃, preserving heat for 3 hours, naturally cooling, grinding and sieving with a 80-mesh sieve for later use;
step (five): mixing the grinded ferric salt, aluminum salt or the mixture of the ferric salt and the aluminum salt with biochar according to the weight part of 20-50:60-80 to obtain the required dephosphorizing agent; the ferric salt comprises ferric sulfate, polymeric ferric sulfate, ferric trichloride and the like, and the aluminum salt comprises aluminum sulfate, polymeric aluminum chloride and the like.
According to a further technical scheme, the driving mechanism comprises a motor, a rotating shaft, a gear disc, a gear ring, an elastic torsion spring and a gear transmission pair;
the shell is fixedly provided with a supporting frame, the motor is fixedly connected with the supporting frame, the rotating shaft is rotationally connected with the supporting frame, the gear transmission pair is arranged between the motor and the rotating shaft, the gear disc is fixedly connected with one end of the rotating shaft, gear rings are fixedly connected to the outside of the heating pipe, a plurality of sections of meshing teeth are distributed on the gear disc at intervals, the gear rings can be meshed with the gear disc, and elastic torsion springs are arranged between the heating pipe and the annular sleeve;
in the second step, after the plant raw material is placed into the heating pipe, the motor is started, the motor drives the rotating shaft to rotate through the gear transmission pair, the rotating shaft drives the gear disc at one end to drive the heating pipe to rotate through meshing with the gear ring, when the gear disc is separated from the gear ring, the heating pipe swings towards the other direction under the driving of the elastic torsion spring, and the heating pipe drives water attached to the plant raw material to be thrown out.
According to a further technical scheme, a plurality of sections of racks are distributed inside the heating pipe.
In the step (II), an air heater is placed on the end cover and is communicated with the rotating shaft through a hose, a plurality of heat conducting holes are formed in one end of the rotating shaft, the air heater is started, heat generated by the air heater enters the rotating shaft, and the rotating shaft is heated to the outside of the heating pipe through the heat conducting holes formed in one end of the rotating shaft.
According to a further technical scheme, the rotating shaft is fixedly connected with a plurality of air deflectors, and when the rotating shaft rotates, the rotating shaft diffuses heat to the periphery of all heating pipes through the air deflectors.
According to a further technical scheme, the air suction mechanism comprises a piston plate, an upper guide ring, a lower guide ring, an elastic telescopic rod, a one-way air inlet pipe and a one-way air outlet pipe;
a sleeve is fixedly connected between the annular sleeve and the shell, the piston plate is in sliding sealing connection in the sleeve, a plurality of elastic telescopic rods are fixedly connected between the piston plate and the inner end surface of the shell, the upper guide ring is fixedly connected with the gear disc, the lower guide ring is fixedly connected with the piston plate, the upper guide ring is abutted with the lower guide ring, the sleeve annular communication has a plurality of one-way intake pipes, and the inlet end of every one-way intake pipe is just right to the bottom of a heating pipe, the inlet end and the sleeve intercommunication of one-way outlet duct, just the outlet end of one-way outlet duct is outside towards annular cover, the inlet end of one-way intake pipe is provided with the filter screen and filters impurity.
According to a further technical scheme, the one-way air outlet pipe is annular, and a plurality of air outlet pipe orifices are communicated with the one-way air outlet pipe.
According to a further technical scheme, the plant raw material is one or more of rice straw, corn straw and soybean straw, and in the process of heating and drying, dust and moisture on the straw drop into a collecting tank at the bottom of the shell along with the heating pipe.
Compared with the prior art, the invention has the following beneficial effects:
according to the preparation method of the dephosphorizing agent for sewage treatment, provided by the invention, on one hand, the heating pipe drives the plant raw materials to collide in the heating pipe, the rack can damage the surface of the plant raw materials to a certain extent, hot air in the heating pipe conveniently enters the plant raw materials, meanwhile, the rack in the heating pipe can increase the surface area of the inner wall of the heating pipe, and the heating efficiency of the heating pipe is increased; furthermore, the rack can increase the contact area between the plant raw material and the heating pipe; on the other hand, the rack on the heating pipe can push the plant raw materials to continuously swing, so that the water attached on the inner wall and the outer wall of the plant raw materials is thrown out, and the drying rate of the plant raw materials is further increased;
according to the preparation method of the dephosphorizing agent for sewage treatment, provided by the invention, the hot air is discharged outwards through the heat conducting holes on the rotating shaft by the hot air machine, and is heated upwards from the lower part of the heating pipe under the guiding action of the annular sleeve, so that the heating efficiency of the lower part of the heating pipe is effectively improved, and meanwhile, the hot air is diffused by the air deflector, so that the surface of the heating pipe is uniformly heated;
according to the preparation method of the dephosphorizing agent for sewage treatment, provided by the invention, after the hot air in the heating pipe is downwards led out by the unidirectional air inlet pipe, the hot air flows out of the unidirectional air outlet pipe to the outside of the annular sleeve; on one hand, the one-way air inlet pipe guides out the hot air in the heating pipe downwards, so that the heat circulation in the heating pipe can be accelerated, the evaporation of water on the inner wall of the heating pipe is accelerated, the heating rate of plant raw materials is improved, and the heating uniformity of the plant raw materials is ensured; on the other hand, impurities on the plant raw materials are discharged into the collecting tank in an accelerating way under the suction effect of the unidirectional air inlet pipe, so that the contact between the hot air and the surface of the plant raw materials is increased.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the connection of the driving mechanism to the heating tube;
FIG. 3 is a half cross-sectional view of the housing;
FIG. 4 is a schematic structural view of an air suction mechanism;
FIG. 5 is an enlarged schematic view of the area A in FIG. 2;
FIG. 6 is an enlarged schematic view of the area B in FIG. 4;
FIG. 7 is a schematic illustration of the connection of the heating tube and the rack.
In the accompanying drawings: 1. a housing; 2. heating pipes; 3. an end cap; 4. a driving mechanism; 41. a motor; 42. a rotating shaft; 43. a gear plate; 44. a gear ring; 45. a gear transmission pair; 5. an annular sleeve; 6. an air suction mechanism; 61. a piston plate; 62. an upper guide ring; 63. a lower guide ring; 64. an elastic telescopic rod; 65. a one-way air inlet pipe; 66. a one-way air outlet pipe; 7. a rack; 8. an air heater; 9. an air deflector; 10. a sleeve; 11. a collection tank; 12. a support frame; 13. a heat conduction hole; 14. a screen plate; 15. and an elastic torsion spring.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
As shown in fig. 1 to 7, the preparation method of the dephosphorizing agent for sewage treatment provided by the invention comprises the following steps:
step (1): washing and collecting plant raw materials with deionized water, then opening an end cover 3 on a shell 1, wherein an annular sleeve 5 is fixedly connected in the shell 1, a plurality of heating pipes 2 are rotatably connected to the inner end surface of the annular sleeve 5, all the heating pipes 2 are commonly connected with heaters, a screen 14 is arranged at the bottom of each heating pipe 2, the plant raw materials are respectively put into each heating pipe 2 in the annular sleeve 5, and the plant raw materials are dried in the heating pipes 2 for 3 hours;
step (II): the method comprises the steps that when plant raw materials are dried, a driving mechanism 4 in a shell 1 is started, the driving mechanism 4 can drive all heating pipes 2 to rotate in a reciprocating mode at the same time, the heating pipes 2 break the pipe walls of the straw and simultaneously throw out water in the plant raw materials; simultaneously, the air suction mechanism 6 at the bottom of the heating pipe 2 guides out the air in the heating pipe 2;
step (III): taking out the dried plant raw materials from the heating pipe 2, and then heating the plant raw materials to 600-700 ℃ in a tube furnace filled with nitrogen at a heating rate of 25-30 ℃/min to obtain the required biochar;
step (IV): placing ferric salt, aluminum salt or a mixture of the ferric salt and the aluminum salt in a baking oven at 110 ℃, preserving heat for 3 hours, naturally cooling, grinding and sieving with a 80-mesh sieve for later use;
step (five): mixing the grinded ferric salt, aluminum salt or the mixture of the ferric salt and the aluminum salt with biochar according to the weight part of 20-50:60-80 to obtain the required dephosphorizing agent; the ferric salt comprises ferric sulfate, polymeric ferric sulfate, ferric trichloride and the like, and the aluminum salt comprises aluminum sulfate, polymeric aluminum chloride and the like.
In the embodiment of the present invention, as shown in fig. 2, 3, 5 and 7, the driving mechanism 4 includes a motor 41, a rotating shaft 42, a gear disc 43, a gear ring 44, an elastic torsion spring 15 and a gear transmission pair 45 as a preferred embodiment of the present invention; the shell 1 is fixedly provided with a support frame 12, the motor 41 is fixedly connected with the support frame 12, the rotating shaft 42 is rotationally connected with the support frame 12, the gear transmission pair 45 is arranged between the motor 41 and the rotating shaft 42, the gear disc 43 is fixedly connected with one end of the rotating shaft 42, the outer part of the heating pipe 2 is fixedly connected with a gear ring 44, a plurality of sections of meshing teeth are distributed on the gear disc 43 at intervals, the gear ring 44 can be meshed with the gear disc 43, and an elastic torsion spring 15 is arranged between the heating pipe 2 and the annular sleeve 5;
in the second step, after the plant raw material is placed in the heating pipe 2, the motor 41 is started, the motor 41 drives the rotating shaft 42 to rotate through the gear transmission pair 45, the rotating shaft 42 drives the gear disc 43 at one end to drive, the gear disc 43 drives the heating pipe 2 to rotate through meshing with the gear ring 44, and when the gear disc 43 is separated from the gear ring 44, the heating pipe 2 swings in the other direction under the driving of the elastic torsion spring 15;
the surface of the plant raw material can be uniformly heated from all directions by the heating pipe 2; further, a plurality of sections of racks 7 are distributed inside the heating pipe 2, the heating pipe 2 reversely rotates under the drive of the elastic torsion spring 15, and the elastic torsion spring 15 can bring larger instantaneous acceleration to the heating pipe 2; on the one hand, the heating pipe 2 drives plant raw materials to collide in the heating pipe 2, the rack 7 can damage the surface of the plant raw materials to a certain extent, hot air in the heating pipe 2 conveniently enters the plant raw materials, meanwhile, the rack 7 in the heating pipe 2 can increase the surface area of the inner wall of the heating pipe 2, the heating efficiency of the heating pipe 2 is increased, and meanwhile, the contact area between the plant raw materials and the heating pipe 2 is increased; on the other hand, the rack 7 on the heating pipe 2 can push the plant raw materials to continuously swing, so that the water attached on the inner wall and the outer wall of the plant raw materials is thrown out, and the drying rate of the plant raw materials is further increased.
In the embodiment of the present invention, as shown in fig. 3, in the step (two), as a preferred embodiment of the present invention, an air heater 8 is placed on the end cover 3, the air heater 8 is communicated with the rotating shaft 42 through a hose, one end of the rotating shaft 42 is provided with a plurality of heat conducting holes 13, the air heater 8 is started, heat generated by the air heater 8 enters the rotating shaft 42, and the rotating shaft 42 is heated to the outside of the heating pipe 2 through the heat conducting holes 13 arranged at one end of the rotating shaft; the rotating shaft 42 is fixedly connected with a plurality of air deflectors 9, and when the rotating shaft 42 rotates, the rotating shaft 42 diffuses heat to the periphery of all heating pipes 2 through the air deflectors 9;
after the water on the plant raw material is thrown out, the water on the plant raw material flows downwards along the heating pipe 2, so that the heat of the downward part of the side wall of the heating pipe 2 is taken away by the water, and the drying rate of the lower part of the plant raw material is affected; at this time, the hot air blower 8 discharges hot air outwards through the heat conducting holes 13 on the rotating shaft 42, and under the guiding action of the annular sleeve 5, the hot air is heated upwards from the lower part of the heating pipe 2, so that the heating efficiency of the lower part of the heating pipe 2 is effectively improved, and meanwhile, the air deflector 9 diffuses the hot air, so that the surface of the heating pipe 2 is uniformly heated.
In the embodiment of the present invention, as shown in fig. 3 to 4, as a preferred embodiment of the present invention, the air suction mechanism 6 includes a piston plate 61, an upper guide ring 62, a lower guide ring 63, an elastic telescopic rod 64, a one-way air inlet pipe 65, and a one-way air outlet pipe 66; the annular sleeve 5 is fixedly connected with the shell 1, the piston plate 61 is in sliding sealing connection in the sleeve 10, a plurality of elastic telescopic rods 64 are fixedly connected between the piston plate 61 and the inner end surface of the shell 1, the upper guide ring 62 is fixedly connected with the gear disc 43, the lower guide ring 63 is fixedly connected with the piston plate 61, the upper guide ring 62 is abutted with the lower guide ring 63, the sleeve 10 is in annular communication with a plurality of one-way air inlet pipes 65, the air inlet end of each one-way air inlet pipe 65 is opposite to the bottom of one heating pipe 2, the air inlet end of each one-way air outlet pipe 66 is communicated with the sleeve 10, and the air outlet end of each one-way air outlet pipe 66 faces the outside of the annular sleeve 5; the unidirectional air outlet pipe 66 is annular, and the unidirectional air outlet pipe 66 is communicated with a plurality of air outlet pipe orifices, and a filter screen is arranged at the air inlet end of the unidirectional air inlet pipe 65 to filter impurities.
The gear disc 43 drives the upper guide ring 62 to rotate, the upper guide ring 62 and the lower guide ring 63 slide relatively, the upper guide ring 62 pushes the lower guide ring 63 to move vertically downwards together with the piston plate 61, at the moment, the elastic telescopic rod 64 contracts, and along with the continuous rotation of the upper guide ring 62, the elastic telescopic rod 64 pushes the piston plate 61 to move vertically upwards;
the piston plate 61 vertically reciprocates in the sleeve 10, and under the action of atmospheric pressure, the hot air in the heating pipe 2 is downwards led out by the unidirectional air inlet pipe 65, and then flows out of the annular sleeve 5 from the unidirectional air outlet pipe 66; on the one hand, the one-way air inlet pipe 65 guides out the hot air in the heating pipe 2 downwards, so that the heat circulation in the heating pipe 2 can be accelerated, the evaporation of water on the inner wall of the heating pipe 2 is accelerated, the heating rate of plant raw materials is improved, and the heating uniformity of the plant raw materials is ensured; on the other hand, the foreign matter on the plant material is accelerated to be discharged into the collecting tank 11 by the suction force of the unidirectional air inlet pipe 65, increasing the contact of the hot air with the surface of the plant material.
In the embodiment of the present invention, as a preferred embodiment of the present invention, the plant material is one or more of rice straw, corn straw and soybean straw, and in the process of heating and drying the straw, the dust and moisture on the straw drop into the collecting tank 11 at the bottom of the housing 1 along with the heating pipe 2.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (8)
1. The preparation method of the dephosphorizing agent for sewage treatment is characterized by comprising the following steps:
step (1): washing and collecting plant raw materials with deionized water, opening end covers (3) on the shell (1), respectively placing the plant raw materials into each heating pipe (2) in the annular sleeve (5), and drying the plant raw materials in the heating pipes (2) for 3 hours;
step (II): the method comprises the steps that when plant raw materials are dried, a driving mechanism (4) in a shell (1) is started, heating pipes (2) are rotationally connected with an annular sleeve (5), the driving mechanism (4) can drive all the heating pipes (2) to rotate in a reciprocating mode at the same time, and the heating pipes (2) break the pipe walls of the straw and throw out water in the plant raw materials; simultaneously, an air suction mechanism (6) at the bottom of the heating pipe (2) guides out air in the heating pipe (2);
step (III): taking out the dried plant raw materials from the heating pipe (2), and then heating the plant raw materials to 600-700 ℃ in a pipe furnace filled with nitrogen at a heating rate of 25-30 ℃/min to obtain the required biochar;
step (IV): placing ferric salt, aluminum salt or a mixture of the ferric salt and the aluminum salt in a baking oven at 110 ℃, preserving heat for 3 hours, naturally cooling, grinding and sieving with a 80-mesh sieve for later use;
step (five): mixing the grinded ferric salt, aluminum salt or the mixture of the ferric salt and the aluminum salt with biochar according to the weight ratio of 20-50:60-80, and obtaining the required dephosphorizing agent.
2. The method for preparing the dephosphorizing agent for sewage treatment according to claim 1, wherein in the second step, after the plant raw material is placed in the heating pipe (2), the motor (41) is started, the motor (41) drives the rotating shaft (42) to rotate through the gear transmission pair (45), the rotating shaft (42) drives the gear disc (43) at one end to drive, a plurality of sections of meshing teeth are distributed on the gear disc (43) at intervals, the heating pipe (2) is fixedly connected with the gear ring (44), the gear disc (43) drives the heating pipe (2) to rotate through meshing with the gear ring (44), and when the gear disc (43) is separated from the gear ring (44), the heating pipe (2) swings to the other direction under the driving of the elastic torsion spring (15), and water attached to the plant raw material is thrown out through the heating pipe (2).
3. The preparation method of the dephosphorizing agent for sewage treatment according to claim 1, wherein a plurality of sections of racks (7) are distributed in the heating pipe (2).
4. The method for preparing a dephosphorizing agent for sewage treatment according to claim 2, characterized in that in the second step, a hot air blower (8) is placed on the end cover (3), the hot air blower (8) is communicated with the rotating shaft (42) through a hose, the hot air blower (8) is started, heat generated by the hot air blower (8) enters the rotating shaft (42), and the rotating shaft (42) is heated to the outside of the heating pipe (2) through a heat conducting hole (13) arranged at one end of the rotating shaft.
5. The method for preparing a dephosphorizing agent for sewage treatment according to claim 2, wherein the rotating shaft (42) is fixedly connected with a plurality of air deflectors (9), and when the rotating shaft (2) rotates, the rotating shaft (42) diffuses heat to the periphery of all heating pipes (2) through the air deflectors (9).
6. The method for preparing a dephosphorizing agent for sewage treatment according to claim 1, wherein the air suction mechanism (6) comprises a piston plate (61), an upper guide ring (62), a lower guide ring (63), an elastic telescopic rod (64), a unidirectional air inlet pipe (65) and a unidirectional air outlet pipe (66);
fixedly connected with sleeve (10) between annular sleeve (5) and shell (1), piston plate (61) sliding seal connects in sleeve (10), fixedly connected with a plurality of elastic telescopic link (64) between the interior terminal surface of piston plate (61) and shell (1), go up guide ring (62) and gear dish (43) fixed connection, lower guide ring (63) and piston plate (61) fixed connection, go up guide ring (62) and lower guide ring (63) butt, sleeve (10) annular intercommunication has a plurality of one-way intake pipe (65), and the inlet end of every one-way intake pipe (65) is just to the bottom of a heating pipe (2), the inlet end of one-way outlet pipe (66) communicates with sleeve (10), just the outlet end of one-way outlet pipe (66) is outside towards annular sleeve (5).
7. The method for preparing a dephosphorizing agent for sewage treatment according to claim 6, wherein the unidirectional air outlet pipe (66) is annular, and a plurality of air outlet pipe orifices are communicated with the unidirectional air outlet pipe (66).
8. The method for preparing the dephosphorizing agent for sewage treatment according to claim 1, wherein the plant raw material is one or more of rice straw, corn straw and soybean straw, and in the process of heating and drying the straw, dust and moisture on the straw drop into a collecting tank (11) at the bottom of the shell (1) along with the heating pipe (2).
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200298202A1 (en) * | 2017-12-12 | 2020-09-24 | Jiangsu Academy Of Agricultural Sciences | Preparation Method for Combined Modified Straw Active Particulate Carbon Adsorption Material and Use of Same |
| CN213454669U (en) * | 2020-05-28 | 2021-06-15 | 天津市恒泰盛通能源科技有限公司 | Drying and cooling equipment for biomass granular fuel |
| CN114713190A (en) * | 2022-04-18 | 2022-07-08 | 成都理工大学 | Sewage phosphorus removal agent and preparation method thereof |
| CN115321618A (en) * | 2021-05-11 | 2022-11-11 | 贵州中车绿色环保有限公司 | Composite environment-friendly phosphorus and fluorine removal agent and preparation method and application thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200298202A1 (en) * | 2017-12-12 | 2020-09-24 | Jiangsu Academy Of Agricultural Sciences | Preparation Method for Combined Modified Straw Active Particulate Carbon Adsorption Material and Use of Same |
| CN213454669U (en) * | 2020-05-28 | 2021-06-15 | 天津市恒泰盛通能源科技有限公司 | Drying and cooling equipment for biomass granular fuel |
| CN115321618A (en) * | 2021-05-11 | 2022-11-11 | 贵州中车绿色环保有限公司 | Composite environment-friendly phosphorus and fluorine removal agent and preparation method and application thereof |
| CN114713190A (en) * | 2022-04-18 | 2022-07-08 | 成都理工大学 | Sewage phosphorus removal agent and preparation method thereof |
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