Waste incineration fly ash desalting device

Abstract

The utility model discloses a waste incineration fly ash desalting device, which belongs to the field of environmental protection and comprises a washing tank, a filter, a desalting liquid tank, an anolyte tank, a concentrated liquid tank, a catholyte tank, an air feeder, a primary electrodialysis tank, a secondary electrodialysis tank and a rectifier. The first-stage electrodialysis tank is connected with the second-stage electrodialysis tank in series, the desalting liquid tank is connected with a desalting liquid pump through a water conveying pipe, the anolyte tank is connected with an anolyte pump through a water conveying pipe, the concentrated liquid tank is connected with a concentrated liquid pump through a water conveying pipe, and the catholyte tank is connected with a catholyte pump through a water conveying pipe. After the washing tank is arranged for washing and desalting the fly ash, the electrodialysis desalting device formed by connecting a plurality of electrodialysis tanks in series is adopted for continuously desalting and separating the fly ash, so that the device is environment-friendly, safe, efficient and energy-saving, secondary pollution is avoided, salt in the fly ash can be effectively removed, and high-quality desalted liquid is obtained; and the concentrated solution can be subsequently subjected to evaporative crystallization to obtain crystalline salt or further treatment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to garbage incineration fly ash processing technology, especially relates to a kind of garbage incineration fly ash desalination device. BACKGROUND

[0002] The salt content of household garbage incineration fly ash is high. If it is directly discharged and landfilled without treatment, the salt may seep into the soil and groundwater, causing soil and water pollution. At the same time, the salt in fly ash may contain some valuable salts, such as sodium chloride and potassium chloride. Through desalination treatment, these valuable salts can be recovered, realizing resource recycling.

[0003] The prior art, such as Chinese patent publication No. CN114850196A, proposes a fly ash water washing desalination system, which sets three water washing tanks to wash and desalt the garbage incineration fly ash. However, this method has high processing cost and consumes a large amount of water resources, which not only increases production cost but also may have certain impact on the environment.

[0004] Therefore, the prior art needs to be further improved. UTILITY MODEL CONTENT

[0005] In view of the above problems, the utility model provides a garbage incineration fly ash desalination device.

[0006] The technical solution of the utility model is as follows:

[0007] A garbage incineration fly ash desalination device, characterized in that it comprises a water washing tank, a filter, a desalination liquid tank, an anode liquid tank, a concentrated liquid tank, a cathode liquid tank, a first-stage electrodialysis cell, a second-stage electrodialysis cell, a rectifier,

[0008] The first-stage electrodialysis cell and the second-stage electrodialysis cell are connected in series, the desalination liquid tank is connected with a desalination liquid pump through a water conveying pipe, the anode liquid tank is connected with an anode liquid pump through a water conveying pipe, the concentrated liquid tank is connected with a concentrated liquid pump through a water conveying pipe, the cathode liquid tank is connected with a cathode liquid pump through a water conveying pipe, and the anode liquid tank and the cathode liquid tank are connected with a blower at the top through a pipeline.

[0009] In the utility model, the water washing tank comprises a feed inlet and a liquid inlet, the garbage incineration fly ash enters the water washing tank from the feed inlet, the water washing liquid enters the water washing tank from the liquid inlet, and the water washing tank is internally provided with a stirrer for mixing the fly ash and the water liquid uniformly. The stirrer is connected with a servo motor, and the servo motor drives the stirrer to rotate.

[0010] In the utility model, the first grade electrodialysis groove bottom is connected with the desalted liquid pump through the water pipe, and the first grade electrodialysis groove top is connected with the desalted liquid tank through the water pipe and forms the circulation loop;The first grade electrodialysis groove bottom is connected with the anode liquid pump through the water pipe, and the second grade electrodialysis groove top is connected with the anode liquid tank through the water pipe and forms the circulation loop;The second grade electrodialysis groove bottom is connected with the concentrated liquid pump through the water pipe, and the second grade electrodialysis groove top is connected with the concentrated liquid tank through the water pipe and forms the circulation loop;The first grade electrodialysis groove bottom is connected with the cathode liquid tank through the water pipe, and the first grade electrodialysis groove top is connected with the cathode liquid pump through the water pipe and forms the circulation loop.

[0011] In the utility model, the first grade electrodialysis groove and the second grade electrodialysis groove from left to right all include anode plate, cation exchange membrane, two anion exchange membranes, cation exchange membrane and cathode plate;The anode plate and cation exchange membrane form anode chamber, and the cation exchange membrane and anion exchange membrane form concentrated chamber, and the anion exchange membrane and anion exchange membrane form desalted chamber, and the anion exchange membrane and cathode plate form cathode chamber;Anode and cathode are connected with rectifier through wire.

[0012] The utility model reaches the technical effect as follows:

[0013] 1、 through setting up the water washing tank, first water washing desalination of fly ash is carried out, and then a plurality of electrodialysis grooves are connected in series to form the electrodialysis desalination device to carry out continuous desalination separation of fly ash, improve the desalination effect, can effectively remove the salt in fly ash, obtain high-quality desalted liquid, and the concentrated liquid can be further recycled subsequently.

[0014] 2、 simple structure, environmental protection safety, do not need to carry out desalination to fly ash by adding chemical agent, and will not produce secondary pollution.

[0015] 3、 power consumption is lower, and high -efficient energy -saving can control fly ash desalination cost. DRAWINGS

[0016] Figure 1 It is the overall structure schematic diagram of garbage incineration fly ash desalination device;

[0017] Mark in the drawing: water washing tank 1, feed inlet 101, liquid inlet 102, agitator 103, motor 104, filter 2, desalted liquid tank 3, desalted liquid pump 4, anode liquid tank 5, anode liquid pump, 6, concentrated liquid tank 7, concentrated liquid pump 8, cathode liquid tank 9, cathode liquid pump 10, air blower 11, first grade electrodialysis groove 12, second grade electrodialysis groove 13, rectifier 14. DETAILED DESCRIPTION

[0018] The utility model is described in detail below in connection with the drawings.

[0019] ReferenceFigure 1 As shown in the figure, a waste incineration fly ash desalination device includes a water washing tank 1, a feed inlet 101, a liquid inlet 102, a stirrer 103, a servo motor 104, a filter 2, a desalination liquid tank 3, a desalination liquid pump 4, an anode liquid tank 5, an anode liquid pump 6, a concentrated liquid tank 7, a concentrated liquid pump 8, a cathode liquid tank 9, a cathode liquid pump 10, a blower 11, a first electrodialysis cell 12, a second electrodialysis cell 13, and a rectifier 14.

[0020] The water washing tank 1 includes the feed inlet 101 and the liquid inlet 102. The waste incineration fly ash enters from the feed inlet 101, and the water washing liquid enters from the liquid inlet 102. The water washing tank 1 is internally provided with the stirrer 103, which is used to stir during the water washing of the waste incineration fly ash, so that the fly ash and the water liquid are more fully contacted. The stirrer is connected with the servo motor 104 above. The servo motor 104 drives the stirrer 103 to rotate in the water washing tank 1.

[0021] Referring again to Figure 1 As shown in the figure, the desalination liquid tank 3 and the desalination liquid pump 4 are connected through a water pipe. The anode liquid tank 5 and the anode liquid pump 6 are connected through a water pipe. The concentrated liquid tank 7 and the concentrated liquid pump 8 are connected through a water pipe. The cathode liquid tank 10 is connected with the cathode liquid pump 10 through a water pipe. The anode liquid tank 5 and the cathode liquid tank 10 are connected with the blower 11 through pipes at the top.

[0022] The first electrodialysis cell 12 is connected with the desalination liquid pump 4 through a water pipe at the bottom, and is connected with the desalination liquid tank 3 through a water pipe at the top to form a circulation loop. The first electrodialysis cell 12 is connected with the anode liquid pump 6 through a water pipe at the bottom, and the second electrodialysis cell 13 is connected with the anode liquid tank 5 through a water pipe at the top to form a circulation loop. The second electrodialysis cell 13 is connected with the concentrated liquid pump 8 through a water pipe at the bottom, and the second electrodialysis cell 13 is connected with the concentrated liquid tank 7 through a water pipe at the top to form a circulation loop. The first electrodialysis cell 12 is connected with the cathode liquid tank 9 through a water pipe at the bottom, and the first electrodialysis cell 12 is connected with the cathode liquid pump 10 through a water pipe at the top to form a circulation loop.

[0023] The first electrodialysis cell 12 and the second electrodialysis cell 13 each include, from left to right, an anode plate, a cation exchange membrane, two anion exchange membranes, a cation exchange membrane, and a cathode plate. The anode plate and the cation exchange membrane form an anode chamber. The cation exchange membrane and the anion exchange membrane form a concentrated chamber. The anion exchange membrane and the anion exchange membrane form a desalination chamber. The anion exchange membrane and the cathode plate form a cathode chamber. The anode and the cathode are connected with the rectifier 14 through wires.

[0024] In the embodiment, the specific working principle of the waste incineration fly ash desalination device is as follows: the fly ash and water enter the water washing tank 1 from the feeding port 101 and the liquid inlet 102 respectively. The servo motor 104 is started, and the servo motor 104 drives the stirrer 103 to rotate, so that the fly ash and water are fully mixed and the contact area is increased, and the soluble salt is dissolved in the water.

[0025] The water-washed fly ash solution enters the filter 2 through the water pipe, and the filtered fly ash solution enters the desalination liquid tank 3 through the water pipe as the initial desalination liquid; and the pure water is added into the concentrated liquid tank 7 as the initial concentrated liquid. At the same time, the desalination liquid pump 4, the anode liquid pump 6, the concentrated liquid pump 8, the cathode liquid pump 10 and the air blower 11 are started, so that the desalination liquid, the anode liquid, the concentrated liquid and the cathode liquid are circulated and operated for 5-10 minutes. The rectifier 14 is turned on, and the first-stage electrodialysis tank 12 and the second-stage electrodialysis tank 13 start to work.

[0026] The working principle of the electrodialysis desalination is as follows: in the electrodialysis stage of the desalination process, the external direct current electric field is applied to promote the directional migration of the anions and cations in the water body under the driving of the electric field force. Specifically, the cations migrate toward the cathode side and penetrate into the concentrated chamber through the cation exchange membrane; and the anions move toward the anode and also penetrate into the concentrated chamber through the anion exchange membrane. The ion exchange membrane has selectivity and permeability, allowing specific types of ions to pass through while effectively preventing the penetration of other ions. Therefore, the ion concentration in the desalination chamber continuously decreases, and finally the desalination liquid is generated; correspondingly, the ion concentration in the concentrated chamber continuously accumulates, and the concentrated liquid is formed.

[0027] The initial desalination liquid passes through the second-stage serially connected electrodialysis tank, and the ion concentration in the desalination chamber becomes more and more dilute under the action of the electric field. The final desalination liquid flows out from the desalination chamber of the first-stage electrodialysis tank 12. The initial concentrated liquid passes through the second-stage serially connected electrodialysis tank, and the ion concentration in the concentrated chamber becomes more and more concentrated. The final concentrated liquid flows out from the concentrated chamber of the second-stage electrodialysis tank 13. The obtained concentrated liquid can be subsequently evaporated and crystallized or used in the next step. The serially connected first-stage electrodialysis tank 12 and second-stage electrodialysis tank 13 are arranged to further continuously desalinate the water-washed fly ash solution, which is energy-saving and environmentally friendly, and improves the desalination effect of the waste incineration fly ash.

[0028] The above describes the utility model and its implementation mode, which is not restrictive. The actual implementation mode is not limited to this. In general, if a person skilled in the art is inspired by this, without departing from the creative purpose of the utility model, similar structural modes and embodiments can be designed without creative design, which should belong to the protection scope of the utility model.

Claims

1. A waste incineration fly ash desalination device, characterized by, It comprises: a water washing tank, a filter, a desalination liquid tank, an anode liquid tank, a concentrated liquid tank, a cathode liquid tank, a first electrodialysis cell, a second electrodialysis cell, a rectifier, wherein the first electrodialysis cell and the second electrodialysis cell are connected in series, the desalination liquid tank is connected with a desalination liquid pump through a water conveying pipe, the anode liquid tank is connected with an anode liquid pump through a water conveying pipe, the concentrated liquid tank is connected with a concentrated liquid pump through a water conveying pipe, the cathode liquid tank is connected with a cathode liquid pump through a water conveying pipe, and the anode liquid tank and the cathode liquid tank are connected with a blower at the top through a pipeline.

2. The apparatus for desalination of MSWI fly ash according to claim 1, wherein The water washing tank comprises a feeding port and a liquid inlet, the waste incineration fly ash enters the water washing tank from the feeding port, and the water washing liquid enters the water washing tank from the liquid inlet; an agitator is arranged inside the water washing tank, the agitator is used for mixing the fly ash and the water liquid uniformly, the agitator is connected with a servo motor, and the servo motor drives the agitator to rotate.

3. The apparatus for desalination of MSWI fly ash according to claim 1, wherein The bottom of the first electrodialysis cell is connected with the desalination liquid pump through a water conveying pipe, the top of the first electrodialysis cell is connected with the desalination liquid tank through a water conveying pipe to form a circulation loop; the bottom of the first electrodialysis cell is connected with the anode liquid pump through a water conveying pipe, the top of the second electrodialysis cell is connected with the anode liquid tank through a water conveying pipe to form a circulation loop; the bottom of the second electrodialysis cell is connected with the concentrated liquid pump through a water conveying pipe, the top of the second electrodialysis cell is connected with the concentrated liquid tank through a water conveying pipe to form a circulation loop; the bottom of the first electrodialysis cell is connected with the cathode liquid tank through a water conveying pipe, and the top of the first electrodialysis cell is connected with the cathode liquid pump through a water conveying pipe to form a circulation loop.

4. The apparatus for desalination of MSWI fly ash according to claim 1, wherein The first electrodialysis cell and the second electrodialysis cell comprise, from left to right, an anode plate, a cation exchange membrane, two anion exchange membranes, a cation exchange membrane and a cathode plate; the anode plate and the cation exchange membrane form an anode chamber, the cation exchange membrane and the anion exchange membrane form a concentrated chamber, the anion exchange membranes form a desalination chamber, and the anion exchange membrane and the cathode plate form a cathode chamber; the anode and the cathode are connected with the rectifier through wires.

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