High-salinity wastewater zero discharge and desalination treatment device

Abstract

The utility model relates to the technical field of wastewater treatment, and provides a high-salinity wastewater zero discharge and desalination treatment device which comprises a box body, and a filter assembly, an evaporation assembly, an electric adsorption assembly, a steady flow pump and an electric control assembly are mounted in the box body; according to the utility model, the wastewater is pretreated through a chemical precipitation method, the salinity is preliminarily reduced, then the quality of the wastewater is improved through an evaporation method, finally salt ions in the water are removed through an electro-adsorption method, and the untreated high-salinity wastewater is recycled and retreated, so that zero discharge of the wastewater is realized; the desalting device is simple in structure, simple and convenient to operate, good in desalting effect, low in operation cost and low in later maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a zero-discharge and desalination treatment device for high-salinity wastewater. Background Technology

[0002] Desalination refers to the removal of cations and anions from water to reduce or eliminate its salt content. With continuous societal development and infrastructure construction, large amounts of high-salinity wastewater are generated daily. If this wastewater is discharged untreated, it will pollute the surrounding environment, increasing the salinity of rivers and lakes, causing organisms to die off due to their inability to adapt to their environment. Therefore, desalination devices are needed to remove salt from high-salinity wastewater to avoid adverse impacts on the ecological environment.

[0003] Currently, common desalination methods include chemical precipitation, membrane separation, ion exchange, electrodialysis, evaporation, and cold crystallization. Chemical precipitation involves adding chemical agents to high-salinity wastewater, causing dissolved substances to convert into sparingly soluble substances and precipitate out, thus achieving desalination. Membrane separation, especially reverse osmosis membrane technology, improves water quality and reduces impurities through reverse osmosis treatment. Ion exchange utilizes the exchange reaction between ions in the solid and liquid phases to remove salt. Electrodialysis uses alternating anion and cation exchange membranes; under an applied DC electric field, anions and cations migrate directionally through the selective ion exchange membrane, separating the salt. Evaporation involves heating high-salinity wastewater to evaporate it, leaving the salt behind. Cold crystallization involves cooling high-salinity wastewater to crystallize the salt, then separating the solid crystals.

[0004] However, each of the above methods has its own drawbacks. Chemical precipitation is suitable for metal recovery projects with small volumes and simple compositions, but not so suitable for treating large volumes and complex chemical wastewater. Membrane separation membranes are easily damaged or fouled, therefore requiring strict control of the influent and process parameters. Ion exchange requires numerous and expensive equipment, resulting in high maintenance costs. Electrodialysis has high requirements for the quality of the influent wastewater. Evaporation requires significant energy and space. Cold crystallization also requires substantial energy, and the solids are difficult to handle.

[0005] Therefore, in order to avoid the shortcomings of the above methods, it is an urgent problem to provide a desalination device that can achieve the best desalination effect and realize zero discharge of high-salt wastewater. Utility Model Content

[0006] To address the problems existing in the prior art, this utility model provides a zero-discharge and desalination treatment device for high-salt wastewater, including a housing, inside which a filter assembly, an evaporation assembly, an electro-adsorption assembly, a flow stabilizer pump, and an electrical control assembly are installed.

[0007] The filtration assembly includes a housing, a partition, and a filter plate; the top of the housing is provided with a liquid inlet pipe, a liquid inlet pipe, and a slag discharge pipe, and a valve is installed on the slag discharge pipe; the bottom of the housing is provided with an outlet; the partition is provided with a liquid discharge pipe, and a valve is installed on the liquid discharge pipe; the partition is fixedly connected to the inner wall of the housing, dividing the interior of the housing into a stirring zone and a filtration zone; the filter plate is fixedly connected to the inner wall of the housing, and the filter plate is installed in the filtration zone and located above the outlet at the bottom of the housing;

[0008] The evaporation assembly includes a tower body, a heating element, and a condenser; the top of the tower is provided with an outlet pipe, and the outlet pipe is provided with a valve three; the bottom of the tower is provided with a liquid outlet pipe, and the liquid outlet pipe is provided with a valve four; the heating element is installed at the bottom of the tower, and the outlet pipe is connected to the condenser inlet;

[0009] The electro-adsorption assembly includes a housing, parallel electrode plates, and a regulated power supply. The housing has an outlet and an inlet. The parallel electrode plates are respectively installed at the inner top and inner bottom of the housing and are fixedly connected to the inner wall of the housing. The regulated power supply is installed on the housing and is electrically connected to the parallel electrode plates.

[0010] The outlet of the first shell is connected to the inlet of the tower body, the liquid outlet pipe is connected to the inlet of the constant flow pump, the outlet of the condenser is connected to the inlet of the constant flow pump, the outlet of the constant flow pump is connected to the inlet of the second shell, the outlet of the second shell is connected to pipe one and pipe two respectively, pipe one is connected to the inlet of the tower body, pipe two is connected to the outside, valve five is installed on pipe one, and valve six is ​​installed on pipe two;

[0011] The electrical control assembly includes a power supply and a controller; the power supply and controller are installed inside the housing, the power supply is externally connected to a wire, and the power supply is electrically connected to the stirring assembly, valve one, valve two, valve three, valve four, valve five, valve six, heating element, condenser, flow pump, regulated power supply and controller respectively; the controller is electrically connected to the operation panels of the stirring assembly, valve one, valve two, valve three, valve four, valve five, valve six, heating element, condenser, flow pump and regulated power supply respectively.

[0012] Preferably, the filter assembly further includes a stirring mechanism, which includes a motor, a shaft, and an anchor stirring rod. The two ends of the shaft are respectively connected to the motor output end and the anchor stirring rod. The blades of the anchor stirring rod are fixedly connected to the shaft through a connecting rod. The motor is mounted on the housing, the shaft passes through the housing, the anchor stirring rod is located in the stirring zone, and the motor is electrically connected to a power supply and a controller.

[0013] Preferably, the filter plate is inclined toward the slag discharge pipe.

[0014] Preferably, the tower body has several tower plates installed inside.

[0015] Preferably, the tower plate is provided with through holes.

[0016] Preferably, the heating element is a heating jacket.

[0017] Preferably, the parallel electrode plates are mounted on the inner top and inner bottom of the housing two via mounting posts.

[0018] Preferably, the parallel electrode plate is provided with a flow guide groove.

[0019] Preferably, the electronic control assembly further includes an operation panel, which is mounted on the housing and electrically connected to the power supply and the controller.

[0020] Preferably, the first shell, the tower body, and the second shell are respectively mounted on the base, and the base is fixedly connected to the bottom of the box.

[0021] This utility model has the following advantages:

[0022] (1) This utility model is equipped with a filtration and stirring device. By mixing high-salt wastewater with a reagent (precipitant or flocculant, etc.), the high-salt wastewater is pretreated. This causes impurities (mud, sand, stones, etc.) in the high-salt wastewater to coagulate into large particles of precipitate. This causes ions that are easy to precipitate in the high-salt wastewater (calcium ions, magnesium ions, carbonate ions, etc.) to precipitate first. The filter residue is then filtered out by the filter screen, thus initially removing salt and purifying the water quality.

[0023] (2) This utility model is equipped with an evaporation device. By heating the wastewater, the water evaporates. As the water decreases, the solubility of the salt exceeds the saturation and crystallizes out. The desalination efficiency is high and the operation is simple. However, due to the large amount of energy required, the evaporation device does not completely evaporate the water and retains some salty water.

[0024] (3) This utility model is equipped with an electro-adsorption device. By applying an electric field to the evaporated water, the anions and cations in the water move towards the electrode plates and are adsorbed by the electrode plates, further removing the salt in the water. This process has the advantages of simple process, simple equipment structure, mature technology, and high desalination rate. The treated wastewater is almost salt-free. Since the wastewater has already undergone evaporation and crystallization, the influent water quality is high and meets the usage conditions. After the evaporated water is treated, the high-salt wastewater at the bottom of the tower also flows through the electrode plates. At this time, the electric field is turned off, and the anions and cations in the electrode plates re-enter the water. The salt content in the high-salt wastewater is further increased, and it is mixed with the next batch of wastewater and enters the evaporation device for evaporation treatment.

[0025] (4) This utility model pretreats wastewater using chemical precipitation to initially reduce salt content, then improves wastewater quality using evaporation, and finally removes salt ions from the water using electro-adsorption. Furthermore, untreated high-salt wastewater is recycled and retreated, achieving zero wastewater discharge. This utility model has a simple structure, is easy to operate, has good desalination effect, low operating cost, and low maintenance cost. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is an overall diagram of the device.

[0028] Figure 2 This is a cross-sectional view of the device.

[0029] Figure 3 This is a structural diagram of the flow guide channel. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1

[0032] Combination Figure 1-3 A zero-discharge and desalination treatment device for high-salt wastewater includes a housing 1, an observation window 102 installed on the outer surface of the housing 1, and a filter assembly, an evaporation assembly, an electro-adsorption assembly, a constant flow pump 7 and an electrical control assembly installed inside the housing 1.

[0033] The filtration assembly includes a stirring mechanism, a housing 202, a partition 203, and a filter plate 204;

[0034] The stirring mechanism includes a motor 2011, a shaft 2012, and an anchor stirring rod 2013. The two ends of the shaft 2013 are respectively connected to the output end of the motor 2011 and the anchor stirring rod 2013. The blades of the anchor stirring rod 2013 are fixedly connected to the shaft 2012 through a connecting rod 2014.

[0035] The top of the shell is provided with a liquid inlet pipe 2021, a liquid inlet pipe 2022 and a slag discharge pipe 2023. A valve 802 is installed on the slag discharge pipe 2023. The bottom of the shell is provided with an outlet.

[0036] The partition 203 is equipped with a drain pipe 2031, and a valve 801 is installed on the drain pipe 2031. The partition 203 is fixedly connected to the inner wall of the housing 202, dividing the interior of the housing 202 into a stirring zone 21 and a filtration zone 22. The filter plate 204 is fixedly connected to the inner wall of the housing 202, and is installed in the filtration zone 22 above the bottom outlet of the housing. The filter plate 204 is inclined towards the slag discharge pipe at an angle of 15°. The motor 2011 is installed on the outer surface of the housing 202, the shaft 2012 penetrates the housing 202, and the anchor-type stirring rod 2013 is located in the stirring zone 21.

[0037] The evaporation assembly includes a tower body 301, a heating jacket 303, and a condenser 304;

[0038] The tower top is equipped with an outlet pipe 3011, and a valve 803 is installed on the outlet pipe 3011. The tower bottom is equipped with a liquid outlet pipe 3012, and a valve 804 is installed on the liquid outlet pipe 3012. Several tower plates 302 are installed inside the tower body 301, and the tower plates 302 are provided with through holes 3021. The heating jacket 303 is fitted onto the bottom of the tower, and the outlet pipe 3011 is connected to the inlet of the condenser 304.

[0039] The electro-adsorption assembly includes a housing 401, a parallel electrode plate 402, and a regulated power supply 403; the housing 401 is provided with an outlet and an inlet.

[0040] The parallel electrode plates 402 are respectively mounted on the inner top and inner bottom of the housing 401 via mounting posts 4021. The parallel electrode plates 402 are fixedly connected to the inner wall of the housing 401, and the parallel electrode plates 402 are provided with flow guide grooves 4022. The regulated power supply 403 is mounted on the upper surface of the housing 401, and the regulated power supply 403 is electrically connected to the parallel electrode plates 402.

[0041] The outlet of shell 202 is connected to the inlet of tower body 301, the liquid outlet pipe 3013 is connected to the inlet of constant flow pump 7, the outlet of condenser 304 is connected to the inlet of constant flow pump 7, the outlet of constant flow pump 7 is connected to the inlet of shell 2 401, the outlet of shell 2 401 is connected to pipeline 1 501 and pipeline 2 502 respectively, pipeline 1 501 is connected to the inlet of tower body 301, pipeline 2 502 is connected to the outside, valve 5 805 is installed on pipeline 1 501, and valve 6 806 is installed on pipeline 2.

[0042] The electrical control assembly includes a power supply 501, a controller 502, and an operation panel 503. The power supply 501 and controller 502 are installed inside the housing 1, and the operation panel 503 is installed on the outer surface of the housing 1. The power supply 501 is connected to external wires and is electrically connected to the motor 2011, valve 1 801, valve 2 802, valve 3 803, valve 4 804, valve 5 805, valve 6 806, heating jacket 303, condenser 304, flow pump 7, regulated power supply 403, controller 502, and operation panel 503. The controller 502 is electrically connected to the motor 2011, valve 1 801, valve 2 802, valve 3 803, valve 4 804, valve 5 805, valve 6 806, heating jacket 303, condenser 304, flow pump 7, regulated power supply 403, and operation panel 503.

[0043] The first shell 202, the tower body 301 and the second shell 401 are respectively mounted on the base 101, and the base 101 is fixedly connected to the bottom of the box body 1.

[0044] The operating principle of this device is as follows: High-salinity wastewater enters the mixing zone 21 through inlet pipe 2021 (or inlet pipe 2022). Chemicals (flocculators, precipitants, etc.) enter the mixing zone 21 through inlet pipe 2022 (or inlet pipe 2021) to mix with the high-salinity wastewater. Motor 2011 is then turned on, driving the anchor-type stirring rod 2013 to rotate, ensuring thorough mixing of the high-salinity wastewater and chemicals. At this time, valve 801 is opened, allowing the high-salinity wastewater to enter the filtration zone 22. Insoluble impurities and precipitates in the wastewater are filtered out by filter plate 204 and discharged through slag discharge pipe 2023.

[0045] The filtrate enters the tower body 301. At this time, the heating jacket 303 is turned on to heat the wastewater. The steam flows to the top of the tower through the through hole 3021, and the liquid water flows to the bottom of the tower through the tower plate 302. The water vapor enters the condenser 304 through the gas outlet pipe 3011 at the top of the tower and is further cooled into liquid water, and then enters the steady flow pump 7.

[0046] The steady-flow pump 7 sends wastewater into the housing 401. A water flow channel 41 is formed between the parallel electrode plates 402. When the wastewater fills the water flow channel 41, the regulated power supply 403 and valve 806 are turned on. The wastewater flows to the outlet through the guiding effect of the guide channel 4022. The regulated power supply 403 provides DC power, and the positive and negative terminals are respectively connected to the parallel electrode plates 402. The parallel electrode plates 402 and the waste liquid in the middle form a parallel plate capacitor, which applies an electric field to the waste liquid. Due to the electric field, the positive and negative ions in the waste liquid begin to move towards the parallel electrode plates 402. Therefore, a large number of positive and negative ions in the wastewater are adsorbed, the salt content is reduced, and clean water is formed. The clean water flows out through the pipe 502.

[0047] After the purified water flows out, close valve 6 (806) and open valve 4 (804). The waste liquid at the bottom of the tower enters the steady flow pump 7, which sends the waste liquid into shell 2 (401). When the waste liquid fills the water flow channel 41, turn off the regulated power supply 403 and open valve 5 (805). The waste liquid flows to the outlet through the guiding action of the guide channel 4022. Because the regulated power supply 403 is turned off, the electric field disappears. At this time, the positive and negative ions adsorbed on the electrode plate are released back into the waste liquid, and the salinity increases, forming high-salt waste liquid. The high-salt waste liquid flows from pipeline 1 (501) to the inlet of tower body 301 and mixes with the next batch of high-salt wastewater before entering the interior of tower body 301 for re-evaporation treatment.

[0048] This device treats high-salt wastewater through evaporation, crystallization, and electroadsorption. The wastewater is recycled for secondary treatment, and the purified water is discharged directly. Most of the salt exists in solid form at the bottom of the tower, which can be cleaned by technicians using routine methods. A small portion of the salt is filtered out by filter plate 204 in solid form, which can also be cleaned by technicians using routine methods. Therefore, it achieves desalination treatment and zero discharge of high-salt wastewater.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A zero-discharge and desalination treatment device for high-salinity wastewater, characterized in that, The enclosure includes a housing, inside which are installed a filter assembly, an evaporation assembly, an electro-adsorption assembly, a constant flow pump, and an electronic control assembly. The filtration assembly includes a housing, a partition, and a filter plate. The top of the housing is provided with a liquid inlet pipe, a liquid inlet pipe, and a slag discharge pipe. A valve is installed on the slag discharge pipe. The bottom of the housing is provided with an outlet. The partition is provided with a liquid discharge pipe, and a valve is installed on the liquid discharge pipe. The partition is fixedly connected to the inner wall of the housing, dividing the interior of the housing into a stirring zone and a filtration zone. The filter plate is fixedly connected to the inner wall of the housing and is installed in the filtration zone above the outlet at the bottom of the housing. The evaporation assembly includes a tower body, a heating element, and a condenser; the top of the tower body is provided with an outlet pipe, and the outlet pipe is provided with a valve three; the bottom of the tower body is provided with a liquid outlet pipe, and the liquid outlet pipe is provided with a valve four; the heating element is installed at the bottom of the tower body, and the outlet pipe is connected to the condenser inlet; The electro-adsorption assembly includes a housing, parallel electrode plates, and a regulated power supply. The housing has an outlet and an inlet. The parallel electrode plates are respectively installed at the inner top and inner bottom of the housing and are fixedly connected to the inner wall of the housing. The regulated power supply is installed on the housing and is electrically connected to the parallel electrode plates. The outlet of the first shell is connected to the inlet of the tower body, the liquid outlet pipe is connected to the inlet of the constant flow pump, the outlet of the condenser is connected to the inlet of the constant flow pump, the outlet of the constant flow pump is connected to the inlet of the second shell, the outlet of the second shell is connected to pipe one and pipe two respectively, pipe one is connected to the inlet of the tower body, pipe two is connected to the outside, valve five is installed on pipe one, and valve six is ​​installed on pipe two; The electrical control assembly includes a power supply and a controller; the power supply and controller are installed inside the housing, the power supply is externally connected to a wire, and the power supply is electrically connected to the stirring assembly, valve one, valve two, valve three, valve four, valve five, valve six, heating element, condenser, flow pump, regulated power supply and controller respectively; the controller is electrically connected to the operation panels of the stirring assembly, valve one, valve two, valve three, valve four, valve five, valve six, heating element, condenser, flow pump and regulated power supply respectively.

2. The high-salinity wastewater zero-discharge and desalination treatment device according to claim 1, characterized in that, The filter assembly also includes a stirring mechanism, which includes a motor, a shaft, and an anchor stirring rod. The two ends of the shaft are respectively connected to the motor output end and the anchor stirring rod. The blades of the anchor stirring rod are fixedly connected to the shaft through a connecting rod. The motor is mounted on the housing, the shaft passes through the housing, the anchor stirring rod is located in the stirring zone, and the motor is electrically connected to the power supply and the controller.

3. The high-salinity wastewater zero-discharge and desalination treatment device according to claim 1, characterized in that, The filter plate is inclined toward the slag discharge pipe.

4. The high-salinity wastewater zero-discharge and desalination treatment device according to claim 1, characterized in that, The tower body contains several tower plates.

5. The high-salinity wastewater zero-discharge and desalination treatment device according to claim 4, characterized in that, The tower plate is provided with through holes.

6. The high-salinity wastewater zero-discharge and desalination treatment device according to claim 1, characterized in that, The heating element is a heating jacket.

7. The zero-discharge and desalination treatment device for high-salinity wastewater according to claim 1, characterized in that, The parallel electrode plates are respectively installed on the inner top and inner bottom of the housing 2 via mounting posts.

8. The zero-discharge and desalination treatment device for high-salinity wastewater according to claim 1, characterized in that, The parallel electrode plate is provided with a flow guide groove.

9. The zero-discharge and desalination treatment device for high-salinity wastewater according to claim 1, characterized in that, The electrical control assembly also includes an operation panel, which is mounted on the housing and electrically connected to the power supply and the controller.

10. A zero-discharge and desalination treatment device for high-salinity wastewater according to claim 1, characterized in that, The first shell, the tower body, and the second shell are respectively mounted on the base, and the base is fixedly connected to the bottom of the box.

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