CN210001704U - Sludge recycling system based on micro-electrolysis/heterogeneous Fenton fluidized bed process - Google Patents
Sludge recycling system based on micro-electrolysis/heterogeneous Fenton fluidized bed process Download PDFInfo
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- CN210001704U CN210001704U CN201920673676.5U CN201920673676U CN210001704U CN 210001704 U CN210001704 U CN 210001704U CN 201920673676 U CN201920673676 U CN 201920673676U CN 210001704 U CN210001704 U CN 210001704U
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Abstract
The utility model discloses an sludge recycling system based on heterogeneous fenton fluidized bed technology of little electrolysis, including fluidized bed reactor, dewatering unit, mixing unit, granulation unit, mummification unit, crushing screening unit and the carbide furnace that connects gradually, the carbide furnace respectively with crushing screening unit with fluidized bed reactor connects for carry out the carbonization reduction to porous iron carbon granule porous carbon load iron granule and handle, and porous iron carbon granule porous carbon load iron granule after the carbonization reduction is handled sends into as fluidized particle cyclic utilization in the fluidized bed reactor, the utility model provides a water treatment sludge recycling system based on little electrolysis of iron carbon heterogeneous fenton fluidized bed technology, can realize the cyclic utilization of mud zero release even, reduce waste water treatment's raw materials cost and sludge disposal cost by a wide margin.
Description
Technical Field
The utility model belongs to waste resource utilization and sewage treatment material preparation field especially relate to kinds of sludge recycling system based on heterogeneous fenton fluidized bed technology of little electrolysis.
Background
The iron-carbon microelectrolysis is a good process for treating wastewater by using a galvanic cell by using a metal corrosion principle method, is ideal processes for treating high-concentration organic wastewater at present, and is also called an internal electrolysis method, wherein under the condition of no power supply, the microelectrolysis material filled in the wastewater generates a 1.2V potential difference to carry out electrolysis treatment on the wastewater so as to achieve the purpose of degrading organic pollutants.
The Fenton process is common advanced oxidation wastewater treatment processes, generates hydroxyl free radicals OH with strong oxidizability to oxidize and decompose organic matters which are difficult to treat by other processes through the catalytic action of ferrous ions on hydrogen peroxide, has the advantages of simple operation and small equipment investment in all the advanced oxidation processes, but generates additional waste sludge due to the addition of the ferrous ions into the wastewater, thereby greatly increasing the sludge treatment cost of the Fenton process.
The heterogeneous Fenton process is an improvement on the Fenton process, and a ferrous solid catalyst and hydrogen peroxide are used for catalytic reaction, so that ferrous sulfate is prevented from being added into water, and the yield of ferrous sludge is reduced. However, since the reactions of the heterogeneous fenton process are usually performed under acidic conditions, iron in the catalyst is gradually consumed, sludge containing iron is still generated, and the catalyst particles need to be replaced periodically along with the consumption of the iron, which also increases additional cost.
So far, both the fenton process and the heterogeneous fenton process still need to face the problem of disposal of the iron containing sludge. Therefore, the iron-containing sludge is effectively recycled, and the method has important significance for reducing the cost of Fenton and heterogeneous Fenton processes, reducing secondary pollutants and expanding the market acceptance.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the above-mentioned problem among the prior art, provide kinds of water treatment mud cyclic utilization systems based on iron carbon micro-electrolysis/heterogeneous fenton fluidized bed technology.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an kind of sludge recycling system based on heterogeneous fenton fluidized bed technology of little electrolysis, including fluidized bed reactor, dehydration unit, mixing unit, granulation unit, mummification unit, crushing screening unit and the carbide furnace that connects gradually, wherein:
the fluidized bed reactor takes porous iron-carbon micro-electrolysis particles or porous carbon loaded iron particles as fluidized particles, carries out micro-electrolysis reaction or heterogeneous Fenton reaction to treat wastewater, and carries out flocculation treatment on the wastewater after reaction to precipitate wastewater flocculation sludge;
the dehydration unit is connected with the fluidized bed reactor and is used for mechanically dehydrating the wastewater flocculation sludge treated by the fluidized bed reactor;
the mixing unit is connected with the dehydration unit and is used for uniformly mixing the iron-containing sludge dehydrated by the dehydration unit with the dehydrated residual biochemical sludge and the adhesive;
the granulation unit is connected with the mixing unit and is used for granulating the sludge mixed by the mixing unit;
the drying unit is connected with the granulating unit and is used for drying the particles prepared by the granulating unit;
the crushing and screening unit is connected with the drying unit and is used for crushing and screening the particles subjected to drying treatment to the particle size of 0.5-3 mm; and
the carbonization furnace is respectively connected with the crushing and screening unit and the fluidized bed reactor and used for carrying out carbonization reduction treatment on particles with the particle size of 0.5-3 mm to obtain porous iron-carbon particles/porous carbon loaded iron particles, and then feeding the porous iron-carbon particles/porous carbon loaded iron particles into the fluidized bed reactor for cyclic utilization.
, the fluidized bed reactor is of a lower-in-upper-out structure, the bottom of a tank body of the fluidized bed reactor is sequentially provided with a supporting plate, an aerator, a water distributor and fluidized particles from bottom to top, the water distributor is communicated with a water inlet pipe, the middle part of the tank body is provided with a fluidized particle feeding port, a top water outlet is provided with a wastewater water outlet pipeline, the water outlet of the wastewater water outlet pipeline is connected with the dehydration unit, the wastewater water outlet pipeline is provided with magnetic separation equipment, and the bottom of the magnetic separation equipment is communicated with the middle part or the bottom of the tank body through a pipeline.
, preferably, baffles which are parallel to each other and inclined at an angle of 45-60 degrees are arranged on the periphery of the upper part of the tank body, the length of each baffle is not less than 50cm, and the upper edge of each baffle is not higher than the water outlet of the tank body;
preferably, the water distributor is in a shape like Chinese character feng.
, preferably, an acid adding interface, a hydrogen peroxide adding interface and a pipeline mixer are sequentially arranged on the water inlet pipe of the water distributor.
, preferably, a single screw pump, a stop valve and an emptying three-way valve are sequentially arranged on a pipeline which is arranged below the magnetic separation device and is communicated with the middle part or the bottom of the tank body.
, preferably, the fluidized particles are porous iron-carbon/porous carbon-supported iron particles.
, the fluidized bed reactor, the dehydration unit, the mixing unit, the granulation unit, the drying unit, the crushing and screening unit and the carbonization furnace are connected by a bucket elevator, a belt conveyor or a screw conveyor.
, adopting a kneader as the mixing unit, adopting extrusion granulation or roller granulation as the granulating unit, and adopting an external heating type rotary furnace as the carbonization furnace.
The above technical scheme is adopted in the utility model, compared with the prior art, following technological effect has:
the utility model discloses sludge recycling system based on heterogeneous fenton fluidized bed technology of little electrolysis, adopt porous iron carbon granule/porous carbon load iron granule to fluidize as the fluidization granule in the reactor, carry out little electrolysis reaction or heterogeneous fenton reaction and handle waste water, the fluidized bed goes out the water and mixes according to appropriate proportion with surplus biochemical mud through the iron-containing mud of neutralization flocculation and precipitation, add appropriate amount adhesive, through mixing, the granulation, the mummification, crushing and screening, carbonization series unit makes into porous iron carbon granule/porous carbon load iron granule, throw back to and use in the fluidized bed reactor, can realize the cyclic utilization of mud and mud zero release even, reduce waste water treatment's raw materials cost and sludge disposal cost by a wide margin.
Drawings
FIG. 1 is a schematic diagram of the overall structure of sludge recycling systems based on micro-electrolysis/heterogeneous Fenton fluidized bed process;
fig. 2 is a schematic structural diagram of a fluidized bed reactor in a sludge recycling system based on the micro-electrolysis/heterogeneous fenton fluidized bed process according to the of the present invention;
fig. 3 is a schematic structural diagram of a water distributor in a sludge recycling system based on the micro-electrolysis/heterogeneous fenton fluidized bed process of the utility model ;
wherein the reference symbols are:
100-fluidized bed reactor, 101-tank, 102-water inlet pipe, 103-acid adding interface, 104-hydrogen peroxide adding interface, 105-pipeline mixer, 106-supporting plate, 107-water distributor, 108-emptying pipeline, 109-aerator, 110-manhole, 111-fluidized particles, 112-catalyst particle feeding port, 113-baffle, 114-magnetic separation equipment, 115-wastewater outlet pipeline, 116-second pH probe, 117-emptying three-way valve , 118-single screw pump, 119- pH probe, 120-stop valve, 200-dehydration unit, 300-mixing unit, 400-granulation unit, 500-drying unit, 600-crushing unit and 700-carbonization furnace.
Detailed Description
The present invention will be described in detail and specifically with reference to the following examples, which are provided in conjunction with the accompanying drawings, so as to provide a better understanding of the present invention, but do not limit the scope of the present invention.
Referring to fig. 1, the utility model provides sludge recycling systems based on little electrolysis/heterogeneous fenton fluidized bed technology, including fluidized bed reactor 100, dehydration unit 200, mixing unit 300, granulation unit 400, mummification unit 500, crushing and screening unit 600 and carbonization furnace 700 that connect gradually, wherein:
the fluidized bed reactor 100 treats wastewater by micro-electrolysis reaction or heterogeneous Fenton reaction with porous iron-carbon micro-electrolysis particles as fluidized fillers or porous carbon-loaded iron particles as fluidized particles, and flocculates the wastewater after reaction to precipitate wastewater flocculated sludge;
the dehydration unit 200 is connected to the fluidized bed reactor 100, and is configured to perform mechanical dehydration on the wastewater flocculated sludge treated by the fluidized bed reactor 100;
the mixing unit 300 is connected with the dehydration unit 200, and is used for uniformly mixing the iron-containing sludge dehydrated by the dehydration unit 200 with the dehydrated residual biochemical sludge and the adhesive;
the granulation unit 400 is connected to the mixing unit 300, and is configured to granulate the sludge mixed by the mixing unit 300;
the drying unit 500 is connected with the granulating unit 400, and is used for drying the particles prepared by the granulating unit 400;
the crushing and screening unit 600 is connected with the drying unit 500 and is used for crushing and screening the particles subjected to drying treatment to the particle size of 0.5-3 mm; and
the carbonization furnace 700 respectively with the crushing and screening unit 600 with the fluidized bed reactor 100 is connected for carry out the carbo-reduction treatment to the particle that the particle diameter is 0.5 ~ 3mm, obtain porous iron-carbon particle/porous carbon load iron particle, then send into the fluidized bed reactor 100 internal recycle.
This water treatment mud cyclic utilization system based on little electrolysis of iron carbon/heterogeneous fenton fluidized bed technology makes into porous iron carbon granule/porous carbon load iron granule through the iron-containing mud that produces little electrolysis of iron carbon/heterogeneous fenton fluidized bed technology and throws back the fluidized bed reactor and use, realizes the cyclic utilization of mud and mud zero release even, reduces waste water treatment's raw materials cost and mud by a wide margin and deals with the cost.
Referring to fig. 2, preferred embodiments show that the fluidized bed reactor 100 is of a lower-inlet and upper-outlet structure, the bottom of a tank 101 of the fluidized bed reactor is sequentially provided with a support plate 106, an aerator 109, a water distributor 107 and fluidized particles 111 from bottom to top, the water distributor 107 is communicated with a water inlet pipe 102, the middle of the tank is provided with a fluidized particle feeding port 112, the top water outlet of the tank is provided with a wastewater water outlet pipe 115, the water outlet of the wastewater water outlet pipe 115 is connected with a dewatering unit 200, the dewatering unit 200 performs flocculation treatment on the discharged wastewater to precipitate iron-containing sludge and performs mechanical dewatering, wherein the wastewater water outlet pipe 115 is provided with a magnetic separation device 114, the bottom of the magnetic separation device 114 is communicated with the middle or bottom of the tank 101 through a pipe, the magnetic separation device 114 intercepts small particles with an iron content of more than 10%, and the intercepted small particles are pumped back into the tank 101 through a circulation.
As preferred embodiments, referring to FIG. 2, the circumference of the upper part of the tank 101 is installed with baffles 113 parallel to each other and inclined at 45-60 degrees, the length of the baffle 113 is not less than 50 cm., the upper edge of the baffle 113 is not higher than the water outlet of the tank 101. because the inclined baffles 113 weaken the fluidization effect of the upper region, when the iron content in the fluidized particles 111 is high enough and the particle size is large, the catalyst particles fluidized to the upper part of the baffles 113 sink rapidly under the action of gravity, and return to the reactor intermittently along the slope of the inclined baffles 113 to continue reacting, when the fluidized particles 111 become smaller and smaller due to the fluidization collision and the iron element is mostly consumed, the particles become light and difficult to settle in the case that the remaining components are mainly porous carbon, and flow out from the water outlet with the waste water . some of the small particles flowing out have a high iron content, the magnetic separation system is installed after the fluidized bed, the particles with an iron content of more than 10% in the effluent are regarded as effective particles, and the particles are caught by the magnetic separation system, and the particles with the effluent are used continuously.
As preferred embodiments, referring to fig. 2, an acid adding port 103 and a hydrogen peroxide adding port 104 are sequentially arranged on a water inlet pipe 102 of the water distributor 107 for adding acid and hydrogen peroxide, a pH probe 119 is further arranged on the water inlet pipe 102 behind the hydrogen peroxide adding port 104, and the acid adding amount is controlled by the pH value, as shown in fig. 3, the water distributor 6 is in a roof-shaped structure.
As another preferred embodiments, referring to FIG. 2, a pH probe 116 is installed on a magnetic separation device 114 to monitor the consumption and loss of fluidized particles 111 in a tank 101 through pH value change, a single-screw pump 118, a stop valve 120 and an emptying three-way valve 117 are installed on a pipeline under the magnetic separation device 114 and communicated with the middle part or the bottom part of the tank 101 in sequence, wastewater treated by the magnetic separation device 114 is discharged from a wastewater outlet pipeline 115 and sent to a dehydration unit 200 to perform flocculation treatment on the discharged wastewater, iron-containing sludge is precipitated and mechanical dehydration is performed, and small particles with iron content of more than 10% are intercepted by the magnetic separation device 114 and returned to the tank 101 through a circulating pipeline.
As another preferred embodiments, referring to FIG. 2, the bottom of the upflow fluidized bed reactor is provided with a vent 108. the fluidized particles 111 are porous iron-carbon particles/porous carbon-supported iron particles in this embodiment, the volume of the fluidized particles 111 in the reactor is not more than 30% by volume so as to be sufficiently fluidized by aeration or by recirculation of the water to be efficiently contacted and reacted with the wastewater.
As another preferred embodiments, referring to fig. 2, the fluidized bed reactor 100, the dewatering unit 200, the mixing unit 300, the granulating unit 400, the drying unit 500, the crushing and screening unit 600, and the carbonizing furnace 700 are connected by a bucket elevator, a belt conveyor, or a screw conveyor, the mixing unit 300 is a kneader, the granulating unit 400 is extrusion granulation or roller granulation, and the carbonizing furnace 700 is an external heating rotary furnace.
The above detailed description of the embodiments of the present invention is only for exemplary purposes, and the present invention is not limited to the above described embodiments. Any equivalent modifications and substitutions to those skilled in the art are also within the scope of the present invention. Accordingly, variations and modifications in equivalents may be made without departing from the spirit and scope of the invention, which is intended to be covered by the following claims.
Claims (9)
1, sludge recycling system based on micro-electrolysis/heterogeneous Fenton fluidized bed process, characterized in that, including fluidized bed reactor (100), dehydration unit (200), mixing unit (300), granulation unit (400), mummification unit (500), crushing and screening unit (600) and carbonization furnace (700) that connect gradually, wherein:
the fluidized bed reactor (100) takes porous iron-carbon micro-electrolysis particles or porous carbon loaded iron particles as fluidized particles, carries out micro-electrolysis reaction or heterogeneous Fenton reaction to treat wastewater, and carries out flocculation treatment on the wastewater after reaction to precipitate wastewater flocculation sludge;
the dehydration unit (200) is connected with the fluidized bed reactor (100) and is used for mechanically dehydrating the wastewater flocculation sludge treated by the fluidized bed reactor (100);
the mixing unit (300) is connected with the dehydration unit (200) and is used for uniformly mixing the iron-containing sludge dehydrated by the dehydration unit (200) with the dehydrated residual biochemical sludge and the adhesive;
the granulation unit (400) is connected with the mixing unit (300) and is used for granulating the sludge mixed by the mixing unit (300);
the drying unit (500) is connected with the granulating unit (400) and is used for drying the particles prepared by the granulating unit (400);
the crushing and screening unit (600) is connected with the drying unit (500) and is used for crushing and screening the particles subjected to drying treatment to the particle size of 0.5-3 mm; and
carbide furnace (700), respectively with crushing and screening unit (600) with fluidized bed reactor (100) are connected for carry out the carbide-reduction to the particle that the particle diameter is 0.5 ~ 3mm and handle, obtain porous iron-carbon particle/porous carbon load iron particle, then send into fluidized bed reactor (100) internal recycle.
2. The sludge recycling system based on the micro-electrolysis/heterogeneous Fenton fluidized bed process according to claim 1, wherein the fluidized bed reactor (100) is of a lower-inlet and upper-outlet structure, the bottom of the tank body (101) is provided with a support plate (106), an aerator (109), a water distributor (107) and fluidized particles (111) from bottom to top, and the water distributor (107) is communicated with the water inlet pipe (102); a fluidized particle feeding port (112) is arranged in the middle of the dehydration unit, a wastewater outlet pipeline (115) is arranged at a water outlet at the top of the dehydration unit, and a water outlet of the wastewater outlet pipeline (115) is connected with the dehydration unit (200); the waste water outlet pipeline (115) is provided with a magnetic separation device (114), and the bottom of the magnetic separation device (114) is communicated with the middle part or the bottom of the tank body (101) through a pipeline.
3. The sludge recycling system based on the micro-electrolysis/heterogeneous Fenton fluidized bed process according to claim 2, wherein baffles (113) which are parallel to each other and inclined at 45-60 degrees are installed at the upper part of the tank body (101), the length of the baffles (113) is not less than 50cm, and the upper edge of the baffles (113) is not higher than the water outlet of the tank body.
4. The sludge recycling system based on micro-electrolysis/heterogeneous Fenton fluidized bed process according to claim 2, characterized in that the water distributor (107) is in a Chinese character feng shape structure.
5. The sludge recycling system based on the micro-electrolysis/heterogeneous Fenton fluidized bed process according to claim 2, characterized in that an acid adding interface (103), a hydrogen peroxide adding interface (104) and a pipeline mixer (105) are sequentially arranged on the water inlet pipe (102) of the water distributor (107).
6. The sludge recycling system based on the micro-electrolysis/heterogeneous Fenton fluidized bed process according to claim 2, wherein a single screw pump (118), a stop valve (120) and an emptying three-way valve (117) are sequentially arranged on a pipeline which is arranged below the magnetic separation device (114) and is communicated with the middle part or the bottom of the tank body (101).
7. The sludge recycling system based on micro-electrolysis/heterogeneous Fenton fluidized bed process according to claim 2, characterized in that the fluidized particles (111) are porous iron-carbon particles or porous carbon-supported iron particles.
8. The sludge recycling system based on the micro-electrolysis/heterogeneous Fenton fluidized bed process according to claim 1, wherein the fluidized bed reactor (100), the dehydration unit (200), the mixing unit (300), the granulation unit (400), the drying unit (500), the crushing and screening unit (600) and the carbonization furnace (700) are connected by a bucket elevator, a belt conveyor or a screw conveyor.
9. The sludge recycling system based on micro-electrolysis/heterogeneous Fenton fluidized bed process according to claim 1, characterized in that the mixing unit (300) employs a kneader; the granulation unit (400) adopts extrusion granulation or roller granulation; the carbonization furnace (700) adopts an external heating type rotary furnace.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110040888A (en) * | 2019-05-13 | 2019-07-23 | 上海明奥环保科技有限公司 | Based on light electrolysis/heterogeneous Fenton fluidized-bed process sludge reuse method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110040888A (en) * | 2019-05-13 | 2019-07-23 | 上海明奥环保科技有限公司 | Based on light electrolysis/heterogeneous Fenton fluidized-bed process sludge reuse method and system |
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