CN217458961U - Automatic separation device for acid-base wastewater in resin tower regeneration process - Google Patents
Automatic separation device for acid-base wastewater in resin tower regeneration process Download PDFInfo
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- CN217458961U CN217458961U CN202221266946.9U CN202221266946U CN217458961U CN 217458961 U CN217458961 U CN 217458961U CN 202221266946 U CN202221266946 U CN 202221266946U CN 217458961 U CN217458961 U CN 217458961U
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Abstract
The utility model discloses an autosegregation device of acid-base waste water in resin tower regeneration process, including resin tower, regeneration waste water jar, chlorine water jar, resin tower bottom is provided with regeneration waste water house steward, connects first online pH meter on the regeneration waste water house steward earlier, and the reconnection three-way valve, the pipeline behind the three-way valve divide into two the tunnel, and alkaline waste water pipe way gets into regeneration waste water jar all the way, and another way gets into chlorine water jar through acidic waste water pipe way, first online pH meter and three-way valve interlocking. The utility model discloses not changing the logic relation of resin tower regeneration procedure, not influencing resin tower normal operating, through the autosegregation that pH meter on-line measuring and three-way valve realized sour alkaline waste water, prejudge resin tower regeneration effect in advance, acid, alkaline waste water are deposited respectively to make full use of existing equipment, need not artificial intervention, and automatic control level is high, can realize continuous steady operation.
Description
Technical Field
The utility model relates to an automatic separation device for acid-base wastewater in the regeneration process of a resin tower.
Background
In the production process of the ionic membrane caustic soda, primary brine passes through a resin tower, and secondary refining is realized by utilizing the adsorption effect of chelating resin. In this process, the passage of primary brine through chelating resin removes a small amount of divalent metal ions (Ca) present in the brine 2+ 、Mg 2+ 、Sr 2+ Etc.) to obtain secondary brine in accordance with the production needs of the electrolytic cell. After the resin tower adsorbs for a period of time, hydrochloric acid and caustic soda are respectively used to regenerate and reduce the resin without adsorption, and the adsorption effect on the divalent metal ions is recovered. In the regeneration process of the resin tower, the resin tower automatically operates according to the steps of washing I, backwashing, acid regeneration, washing II, alkali washing, washing III, filling salt water and the likeAnd a large amount of salt-containing acidic and alkaline wastewater is generated in the regeneration process respectively. At present, the traditional method in the chlor-alkali industry is to discharge acid and alkaline wastewater into a regeneration wastewater tank, neutralize the acid and the alkaline wastewater, and convey the acid and the alkaline wastewater to a primary brine procedure for salt dissolving. The problem with this approach is: acid and alkali in the wastewater are directly neutralized and not fully utilized, so that a great deal of waste of the acid and the alkali is caused. Therefore, the invention explores an automatic separation device capable of separating acid-base wastewater in the regeneration process of the resin tower, realizes the recycling of the acid-base wastewater, and has important significance in reducing the production cost, improving the automation level of the device and the like.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide an automatic separation device that automatic control level is high, continuous steady operation, predetermine accident risk in advance, construction cost is low, reduce material consumption, can be used to acid-base waste water in the resin tower regeneration process.
For solving the technical problem, the utility model discloses a resin tower, regeneration waste water jar, chlorine water jar, its structural feature is resin tower bottom is provided with regeneration waste water house steward, connects first online pH meter on the regeneration waste water house steward earlier, connects the three-way valve again, and the pipeline behind the three-way valve divide into two the tunnel, and alkaline waste water pipeline gets into regeneration waste water jar on the sweetgum fruit, and another sweetgum fruit gets into chlorine water jar through acidic waste water pipeline, first online pH meter and three-way valve interlocking.
As an improvement, a second online pH meter is arranged on the acidic wastewater pipeline and used for monitoring the pH value in the regenerated wastewater on line, and when the pH value of the acidic wastewater is larger than 3, an audible and visual alarm is started and is interlocked with the three-way valve.
As an improvement, a three-way valve bypass is arranged between the regeneration wastewater main pipe in front of the three-way valve and the alkaline wastewater pipeline, and a valve is arranged on the three-way valve bypass.
As a refinement, the "FO" of the three-way valve is set to go to the regeneration waste water tank.
As an improvement, a waste water pump is arranged behind the regeneration waste water tank and is used for conveying alkaline waste water to remove salt; and a chlorine water pump is arranged behind the chlorine water tank and used for conveying the dechlorinated acid wastewater to carry out salt melting.
After the structure is adopted, the utility model has the advantages that:
the logic relation of a regeneration program of the resin tower is not changed, and the normal operation of the resin tower is not influenced; the pH on-line detection and the three-way valve are used for realizing the automatic separation of the acid-base wastewater, the manual intervention is not needed, the automatic control level is high, and the continuous and stable operation can be realized.
Through pH meter on-line measuring, can look over the peak value change of pH valve in the regeneration waste water in real time, prejudge resin tower regeneration effect in advance, can judge when no peak value appears for resin tower regeneration effect is relatively poor, take measures such as times regeneration in advance, avoid causing the damage to the ionic membrane because of secondary salt water quality can not reach the requirement, can realize prejudging the purpose of accident risk in advance.
The existing equipment is fully utilized to store the acidic and alkaline waste water respectively, a new recovery and storage facility is not needed, and the construction cost is low.
The alkaline wastewater in the regeneration process of the resin tower is automatically conveyed to a regeneration wastewater tank, and is collected and sent to primary brine refining process salt, so that the caustic soda consumption is reduced; the acid waste liquid is automatically conveyed to a chlorine water tank, and is uniformly conveyed to a dechlorination tower after being mixed with chlorine water, so that the consumption of hydrochloric acid before dechlorination is reduced. The purpose of simultaneously reducing the consumption of two materials is achieved.
Drawings
The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings:
fig. 1 is a schematic structural view of the present invention;
in the figure: 1. the system comprises a resin tower, a regeneration wastewater main pipe, a first online pH meter, a three-way valve, a basic wastewater pipeline, a regeneration wastewater tank, an acidic wastewater pipeline, a chlorine water tank and a water tank, wherein the resin tower is 2; 9. a second on-line pH meter, 10, a three-way valve bypass.
Detailed Description
Referring to the attached drawings, the automatic acid-base wastewater separation device in the regeneration process of the resin tower comprises a resin tower 1, a regeneration wastewater tank 6 and a chlorine water tank 8. The bottom of the resin tower 1 is provided with a regeneration waste water header pipe 2, the regeneration waste water header pipe 2 is firstly connected with a first online pH meter 3 and then connected with a three-way valve 4, a pipeline behind the three-way valve 4 is divided into two paths, one path enters a regeneration waste water tank 6 through an alkaline waste water pipeline 5, the other path enters a chlorine water tank 8 through an acidic waste water pipeline 7, and the first online pH meter 3 is interlocked with the three-way valve 4; utilize three-way valve 4 to separate acid and alkaline waste water through alkaline waste water pipeline 5 or acid waste water pipeline 7, three-way valve 4 'FO' sets up to going to regeneration waste water tank 6 direction, under self-modulation valve trouble, no air supply state, regeneration waste water still goes to regeneration waste water tank 6, avoids alkaline waste water to produce sodium hypochlorite after getting into chlorine water tank 8. A second online pH meter 9 is arranged on the acidic wastewater pipeline 7 and is used for monitoring the pH value in the regenerated wastewater on line, and when the pH value of the acidic wastewater is more than 3, an audible and visual alarm is started and is interlocked with the three-way valve 4 to be used as protection when the first online pH meter fails; be equipped with three-way valve bypass 10 between regeneration waste water house steward 2 before the three-way valve 4 and the alkaline waste water pipeline 5, be equipped with the valve on the three-way valve bypass 10, the valve of three-way valve bypass 10 keeps the closed condition during normal operating, when three-way valve troubleshooting, opens this valve and lets regeneration waste water house steward 2 pass through three-way valve bypass directly to regenerate waste water jar 6. A waste water pump is arranged behind the regeneration waste water tank 6 and is used for conveying alkaline waste water to remove salt; a chlorine water pump is arranged behind the chlorine water tank 8 and used for conveying acid wastewater for dechlorination and salt formation, the wastewater pump and the chlorine water pump are adjusted by frequency conversion, and the current is automatically adjusted according to the water flow, so that the purposes of saving electricity and reducing the labor intensity of workers are achieved.
The regenerated wastewater is detected on line through the second pH meter 3, the wastewater drainage path is optimized by analyzing the change of the pH value of the wastewater in each time period in the regeneration process of the resin tower, the acidic wastewater is automatically conveyed to the chlorine water tank 8 through the interlocking of the three-way valve 4 and the first on-line pH meter 3, and the consumption of hydrochloric acid before chlorine water enters the dechlorination tower is reduced; the alkaline wastewater is conveyed to the regeneration wastewater tank 6, so that acid-base neutralization reaction is avoided, the wastewater in the regeneration wastewater tank is alkaline, and the wastewater is conveyed to a primary brine process to be used as salt melting, so that the consumption of caustic soda is reduced.
The instruments and valves used in this embodiment are all the prior art, wherein the first online pH meter 3 and the second online pH meter 9 use a conlon 8150 type pH meter, the three-way valve 4 uses a wild L-type pneumatic switch valve, and other necessary sensors, valves, pumps and the like are further arranged on the pipelines according to the process requirements.
The utility model discloses working process under the condition that does not influence resin tower regeneration logic:
firstly, selecting a manual button on a control panel;
selecting a regeneration tower on the control panel;
thirdly, pressing 'water washing I' in a regeneration step switch on a control panel;
and fourthly, pressing an automatic button in the operation mode of the control panel.
And fifthly, pressing a 'start' button on the control panel, and automatically regenerating the selected tower according to the steps of 'washing I' → backwashing → acid regeneration → washing II → alkali regeneration → washing III → waiting I → salt water filling → waiting II 9.
Sixthly, in order to avoid influencing the logic relation of the regeneration program of the resin tower, the device is arranged behind the program control valve of the resin tower. An operation interlocking switch of the device is arranged in a DCS control picture, an operator is switched from an OFF state to an ON state, and an interlocking program of the device is used.
The three-way valve 4 and the first on-line pH meter 3 are set to interlock: when the resin tower regeneration program runs to the water washing II for 10min to the water washing II for 70min, and the first online pH meter 3 detects that the pH value in the regeneration wastewater is less than 3, when the two conditions are met simultaneously, the three-way valve 4 is closed to one side of the alkaline wastewater pipeline 5 and opened to one side of the acidic wastewater pipeline 7, the regeneration wastewater enters the chlorine water tank 8, and the acidic wastewater begins to be recovered. Except for the above time period, the three-way valve 4 is kept open to the side of the alkaline wastewater pipe 5 and is kept closed to the side of the acidic wastewater pipe 7.
In the acid wastewater recovery process, when the second online pH meter 9 detects that the pH value in the wastewater is larger than 3, the acousto-optic alarm is started, the parallel lock three-way valve 4 is closed to go to one side of the acid wastewater pipeline 7, and is opened to one side of the alkaline wastewater pipeline 5, so that the device does not continue to recover the acid wastewater as protection when the first online pH meter 3 fails. During fault treatment, an operator switches the operation interlocking switch from the 'ON' state to the 'OFF' state in a DCS picture, the device does not recover pickling wastewater any more, and after the fault treatment is finished, the operation interlocking switch can be switched to the 'ON' state again according to requirements.
Sixthly, the regeneration process of one resin tower is 24 hours, and when the regeneration of the selected resin tower is finished, the next resin tower is automatically switched to for regeneration.
Claims (5)
1. The utility model provides an automatic separation device of acid-base waste water in resin tower regeneration process, includes resin tower (1), regeneration waste water jar (6), chlorine jar (8), characterized by resin tower (1) bottom is provided with regeneration waste water house steward (2), connects first online pH meter (3) earlier on regeneration waste water house steward (2), connects three-way valve (4) again, and the pipeline behind three-way valve (4) divide into two the tunnel, and alkaline waste water pipeline (5) entering regeneration waste water jar (6) are crossed on one road, and another road enters into chlorine jar (8) through acidic waste water pipeline (7), and first online pH meter (3) and three-way valve (4) interlock.
2. The device for automatically separating acid-base wastewater in the regeneration process of the resin tower as claimed in claim 1, characterized in that a second online pH meter (9) is arranged on the acidic wastewater pipeline (7) and used for monitoring the pH value in the regenerated wastewater online, and when the pH value of the acidic wastewater is more than 3, an audible and visual alarm is started and is interlocked with the three-way valve (4).
3. The automatic acid-base wastewater separation device in the resin tower regeneration process according to claim 1, wherein a three-way valve bypass (10) is arranged between the regeneration wastewater main pipe (2) in front of the three-way valve (4) and the alkaline wastewater pipeline (5), and a valve is arranged on the three-way valve bypass (10).
4. An apparatus for the automatic separation of acid-base waste water in the regeneration process of a resin column according to any one of claims 1 to 3, characterized in that the "FO" of the three-way valve (4) is set to the direction to the regeneration waste water tank (6).
5. The automatic acid-base wastewater separation device in the regeneration process of a resin tower as claimed in any one of claims 1 to 3, characterized in that a wastewater pump is arranged behind the regeneration wastewater tank (6) and used for conveying alkaline wastewater to remove salt; a chlorine water pump is arranged behind the chlorine water tank (8) and is used for conveying the dechlorinated acid wastewater to be desalted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221266946.9U CN217458961U (en) | 2022-05-25 | 2022-05-25 | Automatic separation device for acid-base wastewater in resin tower regeneration process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221266946.9U CN217458961U (en) | 2022-05-25 | 2022-05-25 | Automatic separation device for acid-base wastewater in resin tower regeneration process |
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| Publication Number | Publication Date |
|---|---|
| CN217458961U true CN217458961U (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221266946.9U Active CN217458961U (en) | 2022-05-25 | 2022-05-25 | Automatic separation device for acid-base wastewater in resin tower regeneration process |
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| Country | Link |
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| CN (1) | CN217458961U (en) |
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2022
- 2022-05-25 CN CN202221266946.9U patent/CN217458961U/en active Active
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