CN119320190A - Method and device for preparing sewage treatment agent by using red mud as raw material - Google Patents
Method and device for preparing sewage treatment agent by using red mud as raw material Download PDFInfo
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- CN119320190A CN119320190A CN202411863733.8A CN202411863733A CN119320190A CN 119320190 A CN119320190 A CN 119320190A CN 202411863733 A CN202411863733 A CN 202411863733A CN 119320190 A CN119320190 A CN 119320190A
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- electrodialysis
- pipe
- electrode
- red mud
- sewage treatment
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- 239000010865 sewage Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000002994 raw material Substances 0.000 title claims abstract description 23
- 238000000909 electrodialysis Methods 0.000 claims abstract description 96
- 239000012528 membrane Substances 0.000 claims abstract description 59
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 109
- 239000003795 chemical substances by application Substances 0.000 claims description 25
- 239000013505 freshwater Substances 0.000 claims description 24
- 238000005192 partition Methods 0.000 claims description 23
- 238000007789 sealing Methods 0.000 claims description 19
- 239000003480 eluent Substances 0.000 claims description 18
- 238000005406 washing Methods 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 16
- 238000005341 cation exchange Methods 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 6
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 6
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 3
- 238000005273 aeration Methods 0.000 claims description 3
- 150000001450 anions Chemical class 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000002912 waste gas Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 238000005349 anion exchange Methods 0.000 claims 2
- 238000010828 elution Methods 0.000 claims 1
- 230000033001 locomotion Effects 0.000 abstract description 7
- 230000009471 action Effects 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract 1
- 239000012141 concentrate Substances 0.000 description 30
- 230000001105 regulatory effect Effects 0.000 description 20
- 238000009434 installation Methods 0.000 description 15
- 125000006850 spacer group Chemical group 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 239000003456 ion exchange resin Substances 0.000 description 2
- 229920003303 ion-exchange polymer Polymers 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 229910001388 sodium aluminate Inorganic materials 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- 229910001948 sodium oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
本发明属于污水处理设备技术领域，具体的说是一种利用赤泥为原料制备污水处理剂的方法及装置，包括电渗析壳体、膜堆和电极片，还包括不停机反转机构，本发明通过设置不停机反转机构，在电渗析作业过程中，通过将电渗析壳体内腔中分隔为多个作业槽，并使得其中至少一个作业槽对应的电极被反转，同时在驱动件的作用下，致使多个作业槽与两组电极之间产生相对运动，因此膜堆被分隔在多个作业槽中的部分，先后与反转的电极相对，进而对膜堆进行清理，且由于与反转电极相对应的作业槽仅占电渗析壳体内腔的一部分，因此其余部分仍旧正常进行电渗析作业，进而实现不停机反转除垢作业。
The present invention belongs to the technical field of sewage treatment equipment, and specifically, is a method and device for preparing sewage treatment agent by using red mud as raw material, comprising an electrodialysis shell, a membrane stack and an electrode sheet, and also comprising a non-stop reversing mechanism. The present invention sets a non-stop reversing mechanism. During the electrodialysis operation, the inner cavity of the electrodialysis shell is divided into a plurality of working slots, and the electrode corresponding to at least one of the working slots is reversed. At the same time, under the action of a driving member, relative movement is generated between the plurality of working slots and the two groups of electrodes. Therefore, the part of the membrane stack separated in the plurality of working slots is successively opposite to the reversed electrode, thereby cleaning the membrane stack. Moreover, since the working slot corresponding to the reversed electrode only occupies a part of the inner cavity of the electrodialysis shell, the remaining part still performs the electrodialysis operation normally, thereby realizing the non-stop reversing descaling operation.
Description
Technical Field
The invention belongs to the technical field of sewage treatment equipment, and particularly relates to a method and a device for preparing a sewage treatment agent by using red mud as a raw material.
Background
Red mud is waste residue generated after bauxite is alkali-dissolved, aluminum is generally subjected to high-pressure high-temperature alkali dissolution by adopting a Bayer process because aluminum has the amphiprotic nature of acid dissolution and alkali dissolution, aluminum element enters alkali liquor in the form of sodium aluminate, insoluble solid becomes waste residue, and a large amount of ferric oxide is accompanied in bauxite and is insoluble in alkali liquor, so that the waste residue becomes brownish red slime, and brownish red powdery waste is obtained after dehydration. At present, the disposal of the red mud occupies a large amount of storage yards, and brings great risks to the surrounding environment and the groundwater, so that the recycling of the red mud becomes a difficult problem to be solved urgently in the alumina industry.
In the recycling utilization mode of red mud, the red mud is reacted with acid, so that the method is one of modes for preparing the flocculating agent aluminum ferric chloride, the method can not only utilize the waste red mud, but also generate the aluminum ferric chloride flocculating agent which is one of water treatment agents with better performance, however, the red mud contains more substances such as sodium oxide, sodium aluminate and the like, so that when the dealkalization treatment is not carried out, more acid is required to be consumed when the red mud is adopted to prepare the aluminum ferric chloride, and the properties of a final product can be possibly caused due to the strong alkalinity of the red mud.
In order to dealkalize red mud, a red mud dealkalize and recovery process of electrodialysis coupling ion exchange resin is disclosed in the related art, the scheme is superior to various dealkalize modes of red mud, finally, the dealkalize treatment is carried out on red mud by adopting the electrodialysis coupling ion exchange resin mode, however, in practical application, on one hand, as substances such as alumina and ferric oxide are contained in red mud washing water, when electrodialysis is carried out on red mud eluate, alumina can scale on the membrane surface due to migration effect of electrolyte, and as a result of excessive substances in red mud eluate, the membrane surface scaling rate is too high, although the membrane surface scaling can be dissolved in a mode of reversing electrode slices in the related art, on one hand, electrode slice reversing is frequently carried out, the damage to the electrode slices is larger, and convenience is poor in operation, on the other hand, in the process of frequent electrode slice reversing, intermittent operation can be caused, the smoothness of eluent treatment is affected, and the concentration rate of eluent is reduced.
In view of the above, the invention provides a method and a device for preparing a sewage treatment agent by using red mud as a raw material, which are used for solving the technical problems.
Disclosure of Invention
In order to overcome the defects in the prior art and solve the technical problems, the invention provides a method and a device for preparing a sewage treatment agent by using red mud as a raw material.
The technical scheme adopted for solving the technical problems is as follows:
The invention discloses a device for preparing a sewage treatment agent by using red mud as a raw material, which comprises an electrodialysis shell, a membrane stack and electrode plates, wherein the electrodialysis shell is of a cavity type structure, the electrode plates are respectively arranged at two ends of the inner cavity of the electrodialysis shell, the membrane stack is fixedly arranged in the electrodialysis shell and is formed by a plurality of anion-cation exchange membranes which are arranged at intervals, a concentrated water chamber and a fresh water chamber which are arranged at intervals are formed between the anion-cation exchange membranes, the device also comprises a non-stop reversing mechanism, the non-stop reversing mechanism is arranged in the electrodialysis shell and comprises a mounting pipe, a separation piece and a driving piece, the mounting pipe and the driving piece are rotatably arranged in the inner cavity of the electrodialysis shell, the mounting pipe and the electrodialysis shell are coaxially arranged, the membrane stack is fixedly arranged on the mounting pipe, the separation piece is uniformly arranged in the circumferential direction of the mounting pipe, the inner cavity of the electrodialysis shell is uniformly divided into a plurality of working grooves which are not communicated with each other along the circumferential direction, the mounting pipe penetrates through the electrodialysis shell and extends to the outside of the electrodialysis shell, the driving piece and the driving piece is connected with the two electrode plates at one end of the same electrode plate, and two electrode plates are respectively opposite to each other.
Preferably, the annular design's mounting groove has all been seted up at electrodialysis casing both ends, the electrode slice is all installed in the mounting groove, detachable fixed mounting has the baffle in the mounting groove, the baffle separates the mounting groove into electrodeless chamber, first electrode chamber and second electrode chamber, electrodeless chamber is located between first electrode chamber and the second electrode chamber, two sets of the electrode slice is installed respectively in first electrode chamber and second electrode chamber, and electrodeless chamber range is greater than the range of single operation groove.
Preferably, the regulating grooves are formed in two ends of the electrodialysis shell, uniformly distributed regulating holes are formed in the regulating grooves, the regulating grooves are connected with the mounting grooves in a conducting mode through the regulating holes, the partition plates extend into the regulating grooves through the regulating holes, and the sealing plates are detachably and fixedly mounted at one ends of the regulating grooves away from the mounting grooves.
Preferably, the baffle is close to closing plate one end and is T shape design, the baffle passes through bolt fixed mounting on the closing plate.
Preferably, a plurality of the separating pieces are provided with a connecting ring group together, the connecting ring group is formed by arranging a plurality of connecting rings at intervals, the connecting ring group corresponds to the membrane stack, the separating pieces and the connecting ring group are provided with assembling grooves together, the inner walls of the assembling grooves are fixedly connected with elastic layers, and the connecting ring group and the separating pieces are connected with the membrane stack in an elastic sealing manner through the assembling grooves.
Preferably, slots are formed in the outer wall of the mounting pipe, the connecting ring is composed of a plurality of arc plates, and the arc plates and the slots are in one-to-one correspondence with the separating pieces.
Preferably, the electric dialysis device further comprises a conveying mechanism, the conveying mechanism is connected with the electrodialysis shell, the conveying mechanism is used for controlling a flow path for washing and dewatering, the conveying mechanism comprises a water inlet pipe and a water outlet pipe, the water inlet pipe comprises a first water inlet pipe and a second water inlet pipe, the water outlet pipe comprises a first water concentrate pipe, a second water concentrate pipe, a first light water pipe and a second light water pipe, the first water inlet pipe, the first water concentrate pipe and the first light water pipe all correspond to a first electrode cavity, and the second water inlet pipe, the second water concentrate pipe and the second light water pipe all correspond to a second electrode cavity.
Preferably, the second water inlet pipe, the first concentrate pipe and the first fresh water pipe are fixedly arranged on the electrodialysis shell, the shunt pipes are rotatably arranged in the installation pipe, the first water inlet pipe, the second concentrate pipe and the second fresh water pipe are fixedly arranged in the shunt pipes and are arranged with openings on the outer ring surfaces of the shunt pipes, evenly distributed conducting holes are formed in the installation pipe, and the conducting holes correspond to the operation grooves one by one.
Preferably, a supporting frame is arranged on the outer side of the electrodialysis shell, and the shunt tubes are fixedly arranged on the supporting frame through guide plates.
A method for preparing sewage treatment agent by using red mud as raw material comprises the following steps:
S1, introducing red mud into a washing tank to be mixed with water, performing aeration washing in the washing tank, reducing the pH value of the slurry to 9-10 after washing for a plurality of times, and outputting eluent and mud cakes after press-filtering the slurry through a plate frame;
S2, pumping eluent into the operation tank through the first water inlet pipe and the second water inlet pipe, synchronously starting the non-stop reversing mechanism and the electrode plate, and continuously rotating the eluent in the operation tank in the electrodialysis process;
S3, electrodialysis is carried out on eluent in an operation tank, fresh water for washing red mud and concentrated water serving as an acid waste gas absorbent are output through a water outlet pipe, and simultaneously, the polarity of electrode plates at two sides of a membrane stack is switched along with rotation;
s4, reacting mud cakes with acid at 90-110 ℃ for 1-10 hours, and performing filter pressing, concentration and drying to obtain the aluminum ferric chloride sewage treatment agent.
The beneficial effects of the invention are as follows:
1. According to the method and the device for preparing the sewage treatment agent by using the red mud as the raw material, the non-stop reversing mechanism is arranged, in the electrodialysis operation process, the inner cavity of the electrodialysis shell is divided into the plurality of operation grooves, the electrode corresponding to at least one operation groove is reversed, and meanwhile, under the action of the driving piece, the plurality of operation grooves and the two groups of electrodes are caused to generate relative motion, so that the membrane stack is divided into the parts in the plurality of operation grooves and is opposite to the reversed electrode in sequence, the membrane stack is cleaned, and the operation grooves corresponding to the reversed electrodes only occupy one part of the inner cavity of the electrodialysis shell, so that the rest parts still normally perform electrodialysis operation, and further the non-stop reversing descaling operation is realized.
2. According to the method and the device for preparing the sewage treatment agent by using the red mud as the raw material, water flows in the same operation groove in one rotation period and flows in two opposite directions respectively, so that scouring of the anion-cation exchange membranes in different directions is respectively given, and the probability of falling of a scale layer can be effectively enhanced by utilizing multidirectional scouring and electrode inversion.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a perspective view of another view of the present invention;
FIG. 3 is an assembled perspective view of the mounting tube and membrane stack, separator;
FIG. 4 is an exploded view of the mounting tube and membrane stack, separator;
FIG. 5 is a split view of the electrodialysis housing and the sealing plate;
FIG. 6 is a perspective view of a seal plate;
FIG. 7 is a perspective view of the mounting groove and the spacer;
FIG. 8 is a schematic view of the separation of the mounting slots;
FIG. 9 is a split view of the shunt tube and mounting tube;
FIG. 10 is a flow chart of the method of the present invention;
the device comprises a electrodialysis shell, 11, electrode plates, 12, a cation exchange membrane, 2, a mounting pipe, 21, a separating piece, 22, an operation groove, 23, a driving piece, 24, a mounting groove, 25, a partition board, 26, an electrodeless cavity, 27, a first electrode cavity, 28, a second electrode cavity, 3, an adjusting groove, 31, an adjusting hole, 32, a sealing plate, 4, a connecting ring, 41, an assembling groove, 42, a slot, 5, a first water inlet pipe, 51, a second water inlet pipe, 52, a first water concentrate pipe, 53, a second water concentrate pipe, 54, a first water concentrate pipe, 55, a second water concentrate pipe, 6, a shunt pipe, 61, a conducting hole and 7, a supporting frame.
Detailed Description
The invention is further described in connection with the following detailed description in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 9, the device for preparing sewage treatment agent by using red mud as raw material comprises an electrodialysis shell 1, a membrane stack and electrode plates 11, wherein the electrodialysis shell 1 is a cavity type structure, the electrode plates 11 are arranged at two ends of the inner cavity of the electrodialysis shell 1, the membrane stack is fixedly arranged in the electrodialysis shell 1 and is formed by arranging a plurality of anion-cation exchange membranes 12 at intervals, a concentrated water chamber and a fresh water chamber which are arranged at intervals are formed between the anion-cation exchange membranes 12, the device also comprises a non-stop reversing mechanism which is arranged in the electrodialysis shell 1 and comprises an installation tube 2, a separator 21 and a driving piece 23, the utility model discloses an electrodialysis device, including electrodialysis casing 1, membrane stack, partition piece 21, driving piece 23, electrode piece 11, electric pole piece, driving piece 23 and installation pipe 2 transmission connection, be located the same one end of electrodialysis casing 1 divide into two sets of electrode pieces 11, and two sets of electrode pieces 11 polarity are opposite, and two sets of electrode pieces 11 correspond different operation grooves 22 respectively with electric pole piece 1 in the electric pole casing 1 inner chamber rotation install installation pipe 2, installation pipe 2 and the coaxial setting of electrodialysis casing 1 in electric pole casing 1 inner chamber rotation, installation pipe 2 is installed, installation pipe 2 and electric pole casing 1 coaxial arrangement, membrane stack fixed mounting is on installation pipe 2, partition piece 21 plural design, partition piece 21 evenly arranges in installation pipe 2 circumferencial direction, partition piece 21 equally divide into a plurality of operation grooves 22 that do not switch on each other with electric pole piece 1 inner chamber.
When red mud eluent is subjected to electrodialysis treatment, the electrode plate 11 is reversed, so that the scale accumulation degree of a film can be effectively relieved, in the related art, when the electrode plate 11 is reversed, the polarity of the electrode plates 11 at two ends is regulated by adopting a mode of switching the electrode plates 11 or a mode of directly replacing the electrode plates 11, and the operation can lead to the change of the ion migration direction in the whole electrodialysis equipment, so that when the electrode plates 11 are reversed, sewage in the electrodialysis equipment is required to be discharged, and the sewage treatment rate is influenced.
Specifically, red mud eluent is filled into an electrodialysis shell 1, a worker starts an electrodialysis device, at this time, under the drive of an externally applied direct current electric field, anions and cations respectively move to an anode and a cathode by utilizing the selective permeability of an anion-cation exchange membrane 12, so that the concentration of the red mud eluent is realized (the electrodialysis technology which is well known to the person skilled in the art is not excessively summarized here), in the continuous electrodialysis operation process, a synchronous starting of a non-stop reversing mechanism is realized, wherein a driving piece 23 is in transmission connection with a mounting tube 2, the driving piece 23 is preferably a motor, the motor is mounted on the electrodialysis shell 1 and is connected with the mounting tube 2 through a speed reducer and a coupler which are mounted at the end, the mounting tube 2 rotates at a constant speed in the electrodialysis shell 1 under the effect of the driving piece 23, and as a membrane stack and a partition 21 are mounted on the mounting tube 2, in the process of uniformly rotating the mounting tube 2, the membrane stacks and the separating pieces 21 are synchronously driven to rotate, wherein the separating pieces 21 are uniformly distributed in the circumferential direction of the mounting tube 2, the electrodialysis shell 1 is uniformly divided into a plurality of operation grooves 22 by matching with the mounting tube 2, the operation grooves 22 are not conducted with each other, the electrode plates 11 are arranged at two ends of the electrodialysis shell 1, the electrode plates 11 are divided into two groups, the polarities of the two groups of electrode plates 11 are opposite, it is required to know that the number of one group of electrode plates 11 is at least two and is a certain multiple of two, the same group of electrode plates 11 are uniformly divided at two ends of the electrodialysis shell 1, during the rotating movement of the operation grooves 22, the positions of the operation grooves 22 are changed in the process of uniformly rotating the mounting tube 2, the operation grooves 22 are respectively conducted with different electrode plates 11, during the rotating process, so that the electrodes continue to operate and concentrate the eluent in the process tank 22.
According to the invention, by arranging the non-stop reversing mechanism, in the electrodialysis operation process, the inner cavity of the electrodialysis shell 1 is divided into the plurality of operation grooves 22, and the electrode corresponding to at least one operation groove 22 is reversed, and meanwhile, under the action of the driving piece 23, the plurality of operation grooves 22 and the two groups of electrodes are caused to generate relative motion, so that the parts of the membrane stack divided in the plurality of operation grooves 22 are sequentially opposite to the reversed electrodes, the membrane stack is cleaned, and the operation grooves 22 corresponding to the reversed electrodes only occupy one part of the inner cavity of the electrodialysis shell 1, so that the rest parts still perform electrodialysis operation normally, and further the non-stop reversing descaling operation is realized.
As a preferred embodiment of the invention, both ends of the electrodialysis shell 1 are provided with annular mounting grooves 24, the electrode plates 11 are all arranged in the mounting grooves 24, a partition plate 25 is detachably and fixedly arranged in the mounting grooves 24, the partition plate 25 divides the mounting grooves 24 into an electrodeless cavity 26, a first electrode cavity 27 and a second electrode cavity 28, the electrodeless cavity 26 is positioned between the first electrode cavity 27 and the second electrode cavity 28, two groups of the electrode plates 11 are respectively arranged in the first electrode cavity 27 and the second electrode cavity 28, and the electrodeless cavity 26 is larger than the single operation groove 22.
In practical application, since the mounting tube 2 drives the separator 21 to perform rotary motion in the electrodialysis housing 1, in order to avoid the mutual influence of two groups of electrodes with opposite polarities, the mounting groove 24 is divided into the electrodeless cavity 26, the first electrode cavity 27 and the second electrode cavity 28 by the separator 25, wherein the electrodeless cavity 26 is two in number and is used for separating the first electrode cavity 27 and the second electrode cavity 28, the two groups of electrodes are respectively mounted in the first electrode cavity 27 and the second electrode cavity 28, and since the mounting groove 24 is positioned at two ends of the electrodialysis housing 1, the first electrode cavity 27 and the second electrode cavity 28 are respectively conducted with different operation grooves 22, and then electrodialysis operation with opposite directions is performed in the same cavity of the electrodialysis housing 1.
As a preferred embodiment of the present invention, the electrodialysis shell 1 is provided with adjusting grooves 3at both ends, the adjusting grooves 3 are provided with evenly distributed adjusting holes 31, the adjusting grooves 3 are connected with the mounting groove 24 in a conductive manner through the adjusting holes 31, the partition plate 25 extends into the adjusting grooves 3 through the adjusting holes 31, and a sealing plate 32 is detachably and fixedly mounted at one end of the adjusting grooves 3 away from the mounting groove 24.
The end of the partition plate 25, which is close to the sealing plate 32, is in a T-shaped design, and the partition plate 25 is fixedly arranged on the sealing plate 32 through bolts.
In practical application, in order to further enhance flexibility of electrode reverse descaling operation, the invention is provided with the regulating groove 3 and the regulating hole 31 at two ends of the electrodialysis shell 1, under the communication action of the regulating hole 31, the regulating groove 3 is communicated with the mounting groove 24, in the adjustment of the proportion of the first electrode cavity 27 and the second electrode cavity 28 in the electrodialysis equipment, a worker dismantles the sealing plate 32 which is detachably and fixedly arranged in the regulating groove 3 under the cooperation of a tool, in the process of pulling the sealing plate 32 out of the regulating groove 3, the partition plate 25 which is fixedly connected on the sealing plate 32 by a bolt is synchronously taken out, then the worker dismantles the sealing plate 32 from the partition plate 25, meanwhile, the partition plate 25 is fixed on the sealing plate 32 according to a new proportion, then the sealing plate 32 is reset with the partition plate 25, the regulating groove 3 and the mounting groove 24 are uniformly divided into mutually non-communicated cavities, and therefore, the occupation ratio of the first electrode cavity 27, the second electrode cavity 28 and the electrodeless cavity 26 can be adjusted, and the fact that when the position of the regulating plate 25 on the sealing plate 32 is required to be pulled out of the regulating groove 32, the partition plate 32 is required to be matched with the position of the sealing plate 32, the electrode cavity 26 can be mounted in the circumferential direction of the second electrode cavity 28, and the practical equipment can be more flexible and the higher in the circumferential direction of the regulating cavity 28 is opened when the electrode cavity 31 is required to be more than the regulating hole 31.
As a preferred embodiment of the present invention, a plurality of the spacers 21 are commonly mounted with a plurality of connection rings 4, the connection rings 4 are formed by arranging a plurality of connection rings 4 at intervals, the connection rings 4 correspond to the membrane stack, the spacers 21 and the connection rings 4 are commonly provided with an assembly groove 41, the inner wall of the assembly groove 41 is fixedly connected with an elastic layer, and the connection rings 4 and the spacers 21 are elastically and hermetically connected with the membrane stack through the assembly groove 41.
When the electrodialysis equipment is used, the separator 21 and the membrane stack perform rotary motion in the electrodialysis shell 1, in order to enhance the protection of the membrane stack, the connecting ring 4 group is fixedly arranged on the separator 21, and the membrane stack is clamped and fixed through the assembling grooves 41 formed on the connecting ring 4 group and the separator 21 together, so that the mechanical property of the membrane stack is enhanced, the bending and deformation probability of the membrane stack in the rotary process is reduced, and meanwhile, the connecting ring 4 group is in sliding sealing connection with the inner wall of the electrodialysis shell 1, so that the friction damage of the membrane stack in the rotary motion can be effectively reduced, and the service life of the anion-cation exchange membrane 12 forming the membrane stack is prolonged.
As a preferred embodiment of the present invention, the outer wall of the mounting tube 2 is provided with slots 42, and the connection ring 4 is formed by a plurality of arc plates, and the arc plates and the slots 42 are in one-to-one correspondence with the spacers 21.
Through offer slot 42 on installation pipe 2 to adopt a plurality of arc boards to constitute go-between 4, a plurality of go-between 4 constitute go-between 4 group, cause go-between 4 group, membrane heap, installation pipe 2 and the equal detachable combination of separator 21, consequently when maintaining or maintaining equipment, can be convenient for carry out the dismantlement with the combination with installation pipe 2, membrane heap, separator 21, go-between 4 group, reduce the degree of difficulty that equipment component changed or maintained.
As a preferred embodiment of the invention, a conveying mechanism is further included, the conveying mechanism is connected with the electrodialysis shell 1, the conveying mechanism is used for controlling a flow path for washing and dewatering, the conveying mechanism comprises a water inlet pipe and a water outlet pipe, the water inlet pipe comprises a first water inlet pipe 5 and a second water inlet pipe 51, the water outlet pipe comprises a first water concentrate pipe 52, a second water concentrate pipe 53, a first light water pipe 54 and a second light water pipe 55, the first water inlet pipe 5, the first water concentrate pipe 52 and the first light water pipe 54 correspond to the first electrode cavity 27, and the second water inlet pipe 51, the second water concentrate pipe 53 and the second light water pipe 55 correspond to the second electrode cavity 28.
In order to further enhance the convenience of sewage treatment in the electrodialysis shell 1, the invention is provided with the water inlet pipe and the water outlet pipe, the water inlet pipe and the water outlet pipe are respectively divided into two groups according to the corresponding relation with the first electrode cavity 27 and the second electrode cavity 28, and are respectively named as a first water inlet pipe 5, a first water concentrate pipe 52, a first water concentrate pipe 54, a second water inlet pipe 51, a second water concentrate pipe 53 and a second water concentrate pipe 55, when the sewage is pumped by a water pump in practical application, the sewage enters the operation groove 22 corresponding to the first electrode cavity 27 and the second electrode cavity 28 through the first water inlet pipe 5 and the second water inlet pipe 51 respectively, and as the operation groove 22 continuously rotates and electrodialysis operation is carried out, the operation groove 22 is respectively aligned with the first water concentrate pipe 54, the first water concentrate pipe 52, the second water concentrate pipe 55 and the second water concentrate pipe 53 in the rotating process, so as to output concentrated water and fresh water, it should be noted that the first fresh water pipe 54 and the first concentrate pipe 52 correspond to the adjacent concentrate chamber and fresh water chamber in the same operation tank 22 respectively, in the circumferential direction of the electrodialysis housing 1, the first fresh water pipe 54 and the first concentrate pipe 52 are located at the same position, in the axial direction of the electrodialysis housing 1, the first fresh water pipe 54 and the first concentrate pipe 52 are arranged in a staggered manner, in the same manner, the second fresh water pipe 55 and the second concentrate pipe 53 are arranged in the same manner, since the water inlet pipe and the water outlet pipe are located at fixed positions compared with the electrodialysis housing 1, during the rotation of the operation tank 22, the operation tank 22 is subjected to the flow of water inlet, water outlet, water inlet and water outlet again, and during the switching of the two groups of electrode members, the sewage after the operation tank 22 has been subjected to electrodialysis can be automatically discharged, untreated sewage is pumped, and further, during the continuous rotation process of sewage treatment can be kept, but also avoids the problem of remixing of the separated ions.
As a preferred embodiment of the present invention, the second water inlet pipe 51, the first concentrate pipe 52 and the first fresh water pipe 54 are fixedly installed on the electrodialysis shell 1, the shunt tubes 6 are rotatably installed in the installation pipe 2, the first water inlet pipe 5, the second concentrate pipe 53 and the second fresh water pipe 55 are fixedly installed in the shunt tubes 6 and are arranged with openings on the outer ring surfaces of the shunt tubes 6, the installation pipe 2 is provided with evenly distributed through holes 61, and the through holes 61 are in one-to-one correspondence with the operation grooves 22.
The outside of the electrodialysis shell 1 is provided with a supporting frame 7, and the shunt tube 6 is fixedly arranged on the supporting frame 7 through a guide plate.
By arranging the shunt tubes 6 and fixedly mounting the shunt tubes 6 on the support frame 7, when the operation tank 22 is located in the range of the first electrode cavity 27 in the circumferential rotation process of the operation tank 22, the first water inlet pipe 5 is communicated with the operation tank 22 through the through holes 61 on the mounting pipe 2, sewage flows in the direction away from the center of the anion-cation exchange membrane 12, and when the operation tank 22 is rotated to the range of the second electrode cavity 28, the second water inlet pipe 51 is communicated with the operation tank 22, sewage flows in the direction towards the center of the anion-cation exchange membrane 12, and similarly, when the operation tank 22 corresponds to the first fresh water pipe 54 and the first concentrated water pipe 52, the treated water flows out in the direction away from the center of the anion-cation exchange membrane 12, and when the operation tank 22 corresponds to the second fresh water pipe 55 and the second concentrated water pipe 53, the treated water flows in the same operation tank 22 in two opposite directions respectively, so that the reverse directions of the anion-cation exchange membrane 12 are respectively given, and the reverse flushing probability of the anion-cation exchange membrane 12 is enhanced, and the scale can effectively fall off the layers in multiple directions.
As shown in fig. 10, a method for preparing a sewage treatment agent by using red mud as a raw material comprises the following steps:
S1, introducing red mud into a washing tank to be mixed with water, performing aeration washing in the washing tank, reducing the pH value of the slurry to 9-10 after washing for a plurality of times, and outputting eluent and mud cakes after press-filtering the slurry through a plate frame;
S2, eluent is pumped into the operation tank 22 through the first water inlet pipe 5 and the second water inlet pipe 51, the non-stop reversing mechanism and the electrode plate 11 are synchronously started, and the eluent in the operation tank 22 continuously rotates in the electrodialysis process;
S3, electrodialysis is carried out on eluent in the operation groove 22, fresh water for washing red mud and concentrated water serving as an acid waste gas absorbent are output through a water outlet pipe, and simultaneously, the polarity of electrode plates 11 at two sides of the membrane stack is switched along with rotation;
s4, reacting mud cakes with acid at 90-110 ℃ for 1-10 hours, and performing filter pressing, concentration and drying to obtain the aluminum ferric chloride sewage treatment agent.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
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| CN202411863733.8A CN119320190A (en) | 2024-12-18 | 2024-12-18 | Method and device for preparing sewage treatment agent by using red mud as raw material |
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| CN202411863733.8A CN119320190A (en) | 2024-12-18 | 2024-12-18 | Method and device for preparing sewage treatment agent by using red mud as raw material |
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| DE19527012A1 (en) * | 1994-07-27 | 1996-02-29 | Fraunhofer Ges Forschung | Filter system for lightly polluted air streams |
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| CN106865923A (en) * | 2017-02-14 | 2017-06-20 | 同济大学 | The red mud dealkalization and recovery process of a kind of electrodialysis coupled ion exchanger resin |
| CN210764489U (en) * | 2019-10-15 | 2020-06-16 | 山东北华环保股份有限公司 | Automatic frequent electrode-reversing electrodialysis equipment |
| CN114162927A (en) * | 2020-12-10 | 2022-03-11 | 佛山市美的清湖净水设备有限公司 | Control method and control device of water making equipment and water making equipment |
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2024
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19527012A1 (en) * | 1994-07-27 | 1996-02-29 | Fraunhofer Ges Forschung | Filter system for lightly polluted air streams |
| US20030010639A1 (en) * | 2000-02-15 | 2003-01-16 | Legatski L. Karl | Device and process for electrodialysis of ultrafiltration premeate of electrocoat paint |
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