CN217077076U - Electrochemical system for water softening treatment - Google Patents
Electrochemical system for water softening treatment Download PDFInfo
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- CN217077076U CN217077076U CN202220808435.9U CN202220808435U CN217077076U CN 217077076 U CN217077076 U CN 217077076U CN 202220808435 U CN202220808435 U CN 202220808435U CN 217077076 U CN217077076 U CN 217077076U
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Abstract
The utility model discloses an electrochemical system for water softening treatment. The device comprises a device main body, wherein a water inlet weir, a water inlet buffer zone, a plurality of electrochemical reaction zones, a water outlet buffer zone and a water outlet weir which are communicated with each other are sequentially arranged in the device main body along the flow direction of liquid, and the bottom of each electrochemical reaction zone is connected with a sludge collecting hopper; in each electrochemical reaction area, the partition boards are perpendicular to the flow direction of liquid to be treated and are installed on the fixing frame at a vertical interval, the surfaces of every two adjacent partition boards which are arranged oppositely are respectively provided with a plug-in electrode groove, each plug-in electrode groove is internally provided with a corrosion electrode or a combined electrode, and the corrosion electrodes and the combined electrodes are alternately arranged at intervals in a pairing mode. The system combines the valve metal modified oxide with the valve metal, can obviously improve the filling rate of the negative and positive electrode pairs in the electrochemical device, and further improves the treatment efficiency; in addition, the combined use of the valve metal protective electrode can reduce the aging of the stable electrode and reduce the use cost.
Description
Technical Field
The utility model relates to an electrochemical system in the field of electrochemical treatment, in particular to an electrochemical system for water softening treatment.
Background
The electrolysis process is adopted to soften the hardness ions in the treated water, so that the addition of a large amount of chemical agents can be avoided, the environmental risk is reduced, and the method belongs to a green and environment-friendly process. Recent research around this electrolytic softening process has received much attention in the water treatment industry, with a major focus on scale removal of the deposits and electrode stability. The prior technical proposal provides an automatic descaling electrochemical treatment device, which realizes the removal of cathode scale through mechanical descaling and high-pressure water flow distributed by a central pipe, but an additional matched power device is needed when the scale is removed. The technical proposal also provides that the descaling is realized by the synergistic action of water and compressed air and the shearing force of bubble rupture, and the descaling method still needs to descale under the action of an air pump by virtue of external force. The technical proposal also provides that the mode of ultrasonic vibration scale removal is adopted to realize the removal of the sludge scale, and the new addition of scale removal equipment can not be avoided. No matter mechanical descaling, ultrasonic descaling, water flow washing descaling or airflow shearing descaling are adopted, external force equipment is often required to be additionally arranged to realize descaling, and the operation management risk of the equipment is brought. The other soft descaling mode is mainly reverse-pole descaling, namely current exchange is carried out on a positive electrode and a negative electrode, positive electricity is applied to a deposition electrode, and the purpose of chemical descaling is realized through acid production of an anode. However, the method also has the problem of precious metal loss caused by frequent electrode reversing, the service life of the electrode is seriously shortened, and the operation and maintenance cost of the electric softening equipment is increased.
Therefore, the search for a reliable and economic 'soft descaling' method becomes the key for determining the popularization and application of the electrochemical softened water treatment.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the background art, the utility model aims to provide an electrochemical system for water softening treatment, which can realize the automatic descale of a deposited electrode without increasing power equipment and can not cause the problem of the shortened service life of the electrode caused by electrode inversion.
The utility model adopts the technical proposal that:
the device comprises a device main body, wherein the device main body is of a hollow structure, a water inlet weir, a water inlet buffer zone, a plurality of electrochemical reaction zones, a water outlet buffer zone and a water outlet weir are sequentially arranged in the device main body along the flow direction of liquid to be treated, the water inlet weir, the water inlet buffer zone, the electrochemical reaction zones, the water outlet buffer zone and the water outlet weir are sequentially communicated, the bottom of each electrochemical reaction zone is connected with a sludge collecting hopper, and the electrochemical reaction zones are communicated with the respective sludge collecting hoppers; each electrochemical reaction area comprises an electrochemical structure fixing frame, 2n partition plates, n corrosion electrodes and n combined electrodes, the 2n partition plates are perpendicular to the flow direction of liquid to be treated and are vertically and oppositely arranged on the electrochemical structure fixing frame at intervals, so that the liquid to be treated flows between the adjacent partition plates, the surfaces of every two adjacent partition plates which are oppositely arranged are respectively provided with a plug-in type electrode groove, each plug-in type electrode groove is internally provided with one corrosion electrode or one combined electrode, and the corrosion electrodes and the combined electrodes are alternately arranged at intervals in a pairing mode.
The combined electrode is mainly formed by tightly connecting a valve metal modified oxide electrode and a valve metal electrode.
The valve metal modified oxide electrode of the combined electrode is used as a stable electrode, and the valve metal electrode of the combined electrode is used as a protective electrode.
The stable electrode is a DSA titanium electrode, and the protective electrode is a titanium electrode.
The corrosion electrode is made of iron, aluminum or alloy material.
The plurality of electrochemical reaction areas are arranged in parallel at intervals along the flowing direction of the liquid to be treated.
The plurality of electrochemical reaction zones are all below the liquid level of the liquid to be treated.
The water inlet weir is provided with a water inlet pipe, the water outlet weir is provided with a water outlet pipe, and the bottom of each mud collecting hopper is provided with a mud valve.
The water inlet weir is communicated with the upper part of the water inlet buffer zone, and the water outlet buffer zone is communicated with the upper part of the water outlet weir.
Through adopting above-mentioned technical scheme, compare with prior art, the beneficial effects of the utility model are as follows:
the use of the valve metal modified oxide electrode and the valve metal electrode can avoid the shortening of the service life of the DSA electrode caused by electrode reversing.
The high-current cathode and anode electrodes are adopted, so that the descaling time of the electrodes is shortened, the efficient descaling is realized, and the difficulty in cleaning the electrode is reduced.
Drawings
Figure 1 is a top view of an electrochemical system of the present invention;
figure 2 is a front view of the electrochemical system of the present invention.
Shown in the figure: 1. a water inlet pipe; 2. a water outlet pipe; 3. a mud valve; 4. an apparatus main body; 5. a water inlet buffer zone; 6. a water outlet buffer zone; 7. a mud collection hopper; 8. a plug-in type electrode slot; 9. corroding the electrode; 10. a combined electrode; 11. a water inlet weir; 12. an effluent weir; 13. an electrochemical structure holder; 14. an electrochemical reaction zone.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments, which are not all examples.
As shown in fig. 1 and 2, the utility model discloses an equipment main part 4, equipment main part 4 is hollow structure, weir 11 is intake along pending liquid flow direction has set gradually in the equipment main part 4, intake buffer 5, a plurality of electrochemical reaction district 14, go out water buffer 6 and play water weir 12, intake weir 11, intake buffer 5, a plurality of electrochemical reaction district 14, go out water buffer 6 and play water weir 12 and communicate in proper order, every electrochemical reaction district 14 bottom all is connected with a mud collection fill 7, electrochemical reaction district 14 all communicates with the mud collection fill 7 that corresponds separately.
Each electrochemical reaction area 14 comprises an electrochemical structure fixing frame 13, 2n partition plates, n corrosion electrodes 9 and n combined electrodes 10, wherein the 2n partition plates are vertically arranged on the electrochemical structure fixing frame 13 at intervals in a vertical direction perpendicular to the flowing direction of the liquid to be treated, so that the liquid to be treated can flow between the adjacent partition plates. Every two adjacent baffles are oppositely arranged and are respectively provided with a plug-in type electrode groove 8 on the surface, each plug-in type electrode groove 8 is internally provided with a corrosion electrode 9 or a combined electrode 10, and the corrosion electrodes 9 and the combined electrodes 10 are paired and alternately arranged at intervals. Specifically, the erosion electrode 9 is disposed on the 1 st, 3 rd, 5 th, 7 … 2 th 2n-1 st separator, and the combined electrode 10 is disposed on the 2 nd, 4 th, 6 th, 8 … 2 th separator. And the distance between adjacent electrodes is controlled to be 10.0-50.0 mm.
The combined electrode 10 is mainly composed of a valve metal modified oxide electrode and a valve metal electrode which are tightly connected. The valve metal modified oxide electrode and the valve metal electrode have the characteristic of unidirectional current passing, namely when the combined electrode 10 is used as an anode and is applied with bias voltage, the current flows through the valve metal modified oxide electrode; when the combined electrode 10 is biased as a cathode, a current flows through the valve metal electrode.
Preferably, the valve metal modified oxide electrode of the combined electrode 10 is used as a stable electrode, and the valve metal electrode of the combined electrode 10 is used as a guard electrode.
Preferably, the stabilization electrode is a DSA titanium electrode and the protection electrode is a titanium electrode.
Preferably, the corrosion electrode 9 is a corrosion-prone metal material, such as iron, aluminum or an alloy material.
Preferably, a plurality of electrochemical reaction zones 14 are arranged at intervals in parallel along the flow direction of the liquid to be treated.
Preferably, the plurality of electrochemical reaction zones 14 are each below the surface of the liquid to be treated.
Preferably, the water inlet weir 11 is provided with a water inlet pipe 1, the water outlet weir 12 is provided with a water outlet pipe 2, and the bottom of each sludge collecting hopper 7 is provided with a sludge discharge valve 3 for collecting sludge.
Preferably, the water inlet weir 11 is communicated with the upper part of the water inlet buffer zone 5, and the water outlet buffer zone 6 is communicated with the upper part of the water outlet weir 12.
The softening treatment process of the electrochemical system comprises the following steps:
s1: the electrochemical softening process is carried out by controlling current density at 50-350A/m 2 Taking the combined electrode as an anode, and enabling current to participate in anodic chlorine evolution reaction through a valve metal modified oxide electrode of the combined electrode; using a corrosion electrode asAt the cathode, hardness ions are deposited on the surface of the corrosion electrode to form mud scale.
S2: after the electrochemical softening process is finished, entering an electrochemical descaling process, taking the combined electrode as a cathode, and enabling current to participate in cathode reaction through a valve metal electrode of the combined electrode; the corrosion electrode is used as an anode, and the deposited sludge is removed by the corrosion electrode through the electrochemical dissolution reaction of the corrosion electrode.
In the electrochemical descaling process, when the combined electrode is used as a cathode, the valve metal electrode prevents the loss of precious metal components caused by the reverse electrode of the valve metal modified oxide electrode.
Example (b):
in the embodiment, an electrochemical system with three electrochemical reaction zones 14 is adopted, in the electrochemical system, the combined electrode 10 is formed by combining a net-shaped DSA titanium electrode and a net-shaped titanium electrode, and the corrosion electrode 9 is an aluminum alloy electrode. The combined electrode 10 and the corroding electrode 9 are 30cm multiplied by 10cm in size, the distance between the combined electrode 10 and the corroding electrode 9 is 15mm, no other objects are filled between the combined electrode 10 and the corroding electrode 9, and each electrochemical reaction area 14 comprises 24 groups of the combined electrode 10 and the corroding electrode 9. In the experiment, the total alkalinity of the liquid to be treated is 4.35mmol/L, and the total hardness (1/2 Ca) 2+ Calculated) is 12.68mmol/L, 300A/m is applied in the electrochemical softening process and the electrochemical descaling process 2 The current of (2).
When the electrochemical system is in operation, the liquid to be treated is continuously introduced, and the three electrochemical reaction zones 14 are controlled by the automatic control system to respectively and alternately carry out the electrochemical softening process and the electrochemical descaling process. In the experiment, the retention time of the liquid to be treated in the chemical reaction zone 14 is set as 100s, the treatment time of the continuous electrochemical softening process is set as 48h, and the treatment time of the electrochemical descaling process is set as 10 min. Finally, the sludge generated in the electrochemical softening process and the electrochemical descaling process is collected in the sludge collecting hopper 7.
The experimental result shows that the removal rate of the electrochemical system to the total alkalinity of the liquid to be treated averagely reaches 16.2 percent, and the electrochemical system has the total hardness (1/2 Ca) 2+ Measured), the aging degree of the DSA electrode in the combined electrode 10 has no obvious change before and after use; rotten foodThe accumulation of sludge on the surface of the erosion electrode 9 is not obvious.
In conclusion, the electrochemical system combines the valve metal modified oxide with the valve metal, so that the filling rate of the negative and positive electrode pairs in the electrochemical device can be obviously improved, and the treatment efficiency is further improved; in addition, the combined use of the valve metal protective electrode can reduce the aging of the stable electrode and reduce the use cost.
Claims (9)
1. An electrochemical system for water softening treatment, characterized by: the device comprises a device main body (4), wherein the device main body (4) is of a hollow structure, a water inlet weir (11), a water inlet buffer area (5), a plurality of electrochemical reaction areas (14), a water outlet buffer area (6) and a water outlet weir (12) are sequentially arranged in the device main body (4) along the flow direction of liquid to be treated, the water inlet weir (11), the water inlet buffer area (5), the electrochemical reaction areas (14), the water outlet buffer area (6) and the water outlet weir (12) are sequentially communicated, the bottom of each electrochemical reaction area (14) is connected with a sludge collecting hopper (7), and each electrochemical reaction area (14) is communicated with the corresponding sludge collecting hopper (7); every electrochemical reaction district (14) include electrochemical structure mount (13), 2n baffles, n corrode electrode (9) and n combined electrode (10), and 2n baffles are perpendicular to pending liquid flow direction vertical interval and just to installing on electrochemical structure mount (13) for pending liquid circulates between adjacent baffle, every two adjacent baffle relative arrangement respectively seted up plug-in electrode groove (8) on the surface, all be provided with one in every plug-in electrode groove (8) and corrode electrode (9) or a combined electrode (10), corrode electrode (9) and combined electrode (10) pairing interval alternate arrangement.
2. An electrochemical system for water softening treatment according to claim 1, wherein: the combined electrode (10) is mainly formed by tightly connecting a valve metal modified oxide electrode and a valve metal electrode.
3. An electrochemical system for water softening treatment according to claim 2, wherein: the valve metal modified oxide electrode of the combined electrode (10) is used as a stable electrode, and the valve metal electrode of the combined electrode (10) is used as a protective electrode.
4. An electrochemical system for water softening treatment according to claim 3, wherein: the stable electrode is a DSA titanium electrode, and the protective electrode is a titanium electrode.
5. An electrochemical system for water softening treatment according to claim 1, wherein: the corrosion electrode (9) is made of iron, aluminum or alloy materials.
6. An electrochemical system for water softening treatment according to claim 1, wherein: the plurality of electrochemical reaction zones (14) are arranged in parallel at intervals along the flow direction of the liquid to be treated.
7. An electrochemical system for water softening treatment according to claim 1, wherein: the plurality of electrochemical reaction zones (14) are each below the level of the liquid to be treated.
8. An electrochemical system for water softening treatment according to claim 1, wherein: the water inlet weir (11) is provided with a water inlet pipe (1), the water outlet weir (12) is provided with a water outlet pipe (2), and the bottom of each sludge collecting hopper (7) is provided with a sludge discharge valve (3).
9. An electrochemical system for water softening treatment according to claim 1, wherein: the water inlet weir (11) is communicated with the upper part of the water inlet buffer zone (5), and the water outlet buffer zone (6) is communicated with the upper part of the water outlet weir (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220808435.9U CN217077076U (en) | 2022-04-08 | 2022-04-08 | Electrochemical system for water softening treatment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220808435.9U CN217077076U (en) | 2022-04-08 | 2022-04-08 | Electrochemical system for water softening treatment |
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| Publication Number | Publication Date |
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| CN217077076U true CN217077076U (en) | 2022-07-29 |
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| CN202220808435.9U Active CN217077076U (en) | 2022-04-08 | 2022-04-08 | Electrochemical system for water softening treatment |
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