CN210171460U - Device for controlling multi-step regeneration of concentrated sulfuric acid and automatically adding acid by DCS - Google Patents
Device for controlling multi-step regeneration of concentrated sulfuric acid and automatically adding acid by DCS Download PDFInfo
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- CN210171460U CN210171460U CN201920508861.9U CN201920508861U CN210171460U CN 210171460 U CN210171460 U CN 210171460U CN 201920508861 U CN201920508861 U CN 201920508861U CN 210171460 U CN210171460 U CN 210171460U
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Abstract
DCS controls dense H2SO4Apparatus for multi-step regeneration and automatic acid addition, including concentrated H2SO4Storage tank, sour batch meter, sprayer, regeneration water pump, positive bed \ mix bed, DCS control system, sour batch meter goes out sour accent valve accessible PID and trails HIT signal feedback DCS control and adjust the accent valve aperture that different concentrations correspond, and regeneration water pump accessible DCS control is collected FIT signal transmission instruction and is adjusted the flow in the converter, guarantees at different flow, different H2SO4Under the condition of concentration, root of concentrated sulfuric acid is regenerated according to the curveRealizes concentrated H2SO4And controlling regeneration by a multi-step DCS, simultaneously collecting LIT signals by a DCS control system, and sending instructions to the acid outlet pneumatic valve of the storage tank and the acid inlet pneumatic valve of the acid metering box to realize the automatic acid adding function. The utility model provides high power plant's productivity safety rate, realize the APS function after the system is put into operation.
Description
Technical Field
The utility model relates to a water treatment technical field, in particular to DCS control concentrated sulfuric acid (H)2SO4) A device for multi-step regeneration and automatic acid addition.
Background
At present, ion exchangers of water treatment systems generally use concentrated hydrochloric acid and concentrated H2SO4The cation resin is regenerated, concentrated hydrochloric acid regeneration usually adopts one-step regeneration, and the cost of one-time regeneration is probably concentrated H2SO43 times of that of the hydrochloric acid, while the Cl produced by the concentrated hydrochloric acid regeneration method-The method is stable, is not volatile and is not easy to separate out, the wastewater is difficult to treat, and the environmental protection burden of the wastewater treatment of the power plant is undoubtedly increased on the premise that the current national environmental protection policy is increasingly severe. Concentrated H2SO4The regenerated cation exchange resin has lower production cost than hydrochloric acid, the effluent quality is consistent, and simultaneously concentrated H is utilized2SO4The sewage generated by regeneration is convenient to treat, creates favorable conditions for zero discharge of the wastewater, is beneficial to environmental protection of peripheral areas, and has good social benefits.
However, to prevent calcium sulfate precipitation, concentrated H2SO4Regeneration is generally carried out by a multi-step (three or even more) regeneration process, usually H2SO4The regeneration operation needs manual parameter adjustment at different stages, the operation is more complicated than hydrochloric acid regeneration, the manual operation is more, and the test of DCS program control is increased on the premise that the automation requirement of the water treatment technology is higher and higher; simultaneously concentrating H2SO4Has strong corrosiveness and is manually adjusted, and the conventional acid metering box is usually controlled by manual acid adding personnelThe manual door is controlled to operate, potential safety hazards of personnel and equipment caused by equipment leakage on site, reverse flow of desalted water and the like are increased during regeneration, and potential safety hazards of personnel on site are increased by manual acidification.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a DCS controls the concentrated H2SO4A device for multi-step regeneration and automatic acid addition, which overcomes the defect of concentrated H in the prior art2SO4The defect that the concentration and the flow of acid are required to be manually adjusted in different regeneration stages is overcome, the advantages of improving the logic of DCS program control, improving the operation economy, saving the manpower investment, improving the working safety environment and the like are improved, meanwhile, the defect that the potential safety hazard of personnel is increased by manual operation in the prior art is overcome, and the function of automatically controlling the acid addition by the DCS is realized.
In order to realize the purpose, the utility model discloses a technical scheme is:
DCS controls dense H2SO4Apparatus for multi-step regeneration and automatic acid addition, including concentrated H2SO4Storage tank 1, said rich H2SO4An outlet of the storage tank 1 is connected with an inlet of an acid metering box 4, an outlet of the acid metering box 4 is connected with an ejector 9, an acid metering box acid outlet regulating valve 7 for regulating different flow rates is arranged between the acid metering box 4 and the ejector 9, the ejector 9 is connected with a regeneration water pump 12, and an outlet of the ejector 9 is connected with a cation bed/mixed bed; the device also comprises a DCS control system;
said rich H2SO4A storage tank acid outlet pneumatic valve 2 and an acid metering box acid inlet pneumatic valve 3 are arranged between the storage tank 1 and the acid metering box 4.
The acid metering tank 4 is provided with an acid metering tank liquid level meter 11, and the storage tank acid outlet pneumatic valve 2, the acid metering tank acid inlet pneumatic valve 3 and the acid metering tank liquid level are in interlocking protection.
The acid metering tank liquid level meter 11 has an LS liquid level alarming function.
And a corrosion-resistant check valve 5 and an acid metering tank acid outlet manual valve 6 are arranged between the acid metering tank 4 and the acid metering tank acid outlet regulating valve 7. Compared with the prior art, the corrosion-resistant check valve 5 can prevent demineralized water from flowing back to the acid metering box to cause the lining plastic of the metering box to be heated and corroded to be damaged due to damage of an injector, misoperation, insufficient pressure of a reclaimed water pump and the like in the regeneration process.
The regenerated water pump 12 has a frequency conversion device, and the flow can be automatically adjusted in the regeneration process.
The acid metering tank 4 is a regulating valve with the function of regulating the opening degree, and the regeneration process is carried out according to the concentration H2SO4The regeneration trend automatically adjusts the acid concentration.
A flowmeter 8 is arranged between the reclaimed water pump 12 and the ejector 9, and an acid concentration meter 10 is arranged between the ejector 9 and the cation bed/mixed bed.
The acid metering box acid outlet regulating valve 7, the regenerated water pump 12, the flowmeter 8, the acid concentration meter 10, the acid metering box liquid level meter 11, the storage tank acid outlet pneumatic valve 2 and the acid metering box acid inlet pneumatic valve 3 are electrically connected with the DCS control system 13.
DCS control system 13 accessible gather sour batch meter level gauge 11 respectively, send instruction and go into sour pneumatic valve 3 in storage tank play acid pneumatic valve 2 and sour batch meter, realize automatic acidification.
The DCS control system 13 can respectively collect signals of the flowmeter 8 and the acid concentration meter 10, send instructions to the reclaimed water pump (frequency conversion) 12 and the acid metering box acid outlet regulating valve 7, and ensure that the water is in different flow rates and different H2SO4Under the condition of concentration, the concentrated H is realized fundamentally according to the regeneration curve of concentrated sulfuric acid2SO4And (3) performing multi-step DCS control to regenerate the cation bed/mixed bed cation resin.
The utility model has the advantages that:
the utility model discloses a concentrated H of DCS control2SO4Multi-step regeneration function, automatic acid adding function, and avoiding manual H concentration2SO4To the harm that the person produced, can prevent regeneration process in demineralized water "refluence" to sour batch meter simultaneously, lead to equipment to damage, have that degree of automation is high, the simple operation, environmental protection, economy, saving manpower, improve advantages such as civilized operational environment, improvement power plant safety productivity ratio, realize APS after the system is put into operationAnd (4) performing functions.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the DCS control schematic of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in FIG. 1 and FIG. 2, a DCS controls the rich H2SO4Apparatus for multi-step regeneration and automatic acid addition, including concentrated H2SO4The system comprises a storage tank 1, a storage tank acid outlet pneumatic valve 2, an acid metering box acid inlet pneumatic valve 3, an acid metering box 4, a corrosion-resistant check valve 5, an acid metering box acid outlet manual valve 6, an acid metering box acid outlet regulating valve 7, a flowmeter (with a remote transmission function) 8, an ejector 9, an acid concentration meter 10, an acid metering box liquid level meter (with a remote transmission function) 11, a reclaimed water pump 12 and a DCS control system 13.
The configuration design parameters of the device are as follows:
regenerative water pump (variable frequency): q is 40m3H, H is 40m, the material of the overcurrent component is S30408, and the power of a matched motor is 15 KW; regeneration water pump converter: 11 KW; an acid metering box: v is 0.4m3The material is steel lining PTFE (1 layer, not less than 3 mm); the flow transmitter: DN80Q ═ 50m3H; the valve group adopts 2 DN50 PN1.0 air-opening (normally closed) rubber-lined diaphragm valves, 1 DN50 PN1.0 air-opening (valve-adjusting) rubber-lined diaphragm valve, 1 corrosion-resistant check valve DN50 PN 1.01 and an acid ejector: polytetrafluoroethylene material.
Monitoring parameters of the whole system:
1. and (4) concentration meter: 1 to 10 percent; 2. flow rate: 0-40m3H; 3. liquid level: 0-1500 mm; 4. frequency: 0-50 HZ.
The storage tank acid outlet pneumatic valve 2 can be interlocked with the acid metering box acid inlet pneumatic valve 3 and an LIT (remote liquid level meter) 11, so that the automatic acid adding function is realized.
The acid-proof check valve 5 can prevent the damage of the metering box caused by the reverse flow of the desalted water into the acid metering box caused by the damage of the ejector, the misoperation, the insufficient pressure of the reclaimed water pump and the like.
The regeneration water pump 12 is arranged in a frequency conversion mode, so that the regeneration flow can be automatically adjusted.
The acid outlet regulating valve 7 of the acid metering tank can automatically regulate the acid outlet amount, so that the concentration of the regenerated acid is regulated.
The acid metering tank liquid level meter 11 has an LS liquid level alarm function.
The acid metering box acid outlet regulating valve 7, the regenerated water pump 12, the flowmeter 8, the acid concentration meter 10, the acid metering box liquid level meter 11, the storage tank acid outlet pneumatic valve 2 and the acid metering box acid inlet pneumatic valve 3 are electrically connected with the DCS control system 13.
The DCS control system 13 can respectively collect signals of the flowmeter 8 and the acid concentration meter 10, send instructions to the reclaimed water pump (frequency conversion) 12 and the acid metering box acid outlet regulating valve 7, and ensure that the water is in different flow rates and different H2SO4Under the condition of concentration, the concentrated H is realized fundamentally according to the regeneration curve of concentrated sulfuric acid2SO4And (3) performing multi-step DCS control to regenerate the cation bed/mixed bed cation resin.
Sour batch meter level gauge 11 is gathered respectively to DCS control system 13 accessible, send instruction and advance sour pneumatic valve 3 in storage tank play sour pneumatic valve 2 and sour batch meter, the storage tank go out sour pneumatic valve 2, sour batch meter advance sour pneumatic valve 3 and sour batch meter level gauge 11 liquid level interlocking, storage tank play sour pneumatic valve 2 during low liquid level, sour batch meter advances sour pneumatic valve 3 and opens simultaneously and carry out the automation and add acid, storage tank play sour pneumatic valve 2 during high liquid level, sour batch meter advances sour pneumatic valve 3 and closes simultaneously, the automatic stop adds acid.
The utility model discloses a theory of operation is:
before adding acid to the acid metering box 4, the storage tank acid outlet manual valve is kept normally open, the storage tank acid outlet pneumatic valve 2, the acid metering box acid inlet pneumatic valve 3 and the remote transmission liquid level meter 11 are interlocked, when the acid metering box 4 is in a low liquid level alarm state, the storage tank acid outlet pneumatic valve 2 and the acid metering box 4 acid inlet pneumatic valve 3 are simultaneously opened for automatic acid adding, when the liquid level is in a high alarm state, the storage tank acid outlet pneumatic valve 2 and the acid metering box 4 acid inlet pneumatic valve 3 are automatically closed to stop acid adding, and therefore the acid adding automatic function is achieved;
the DCS control system 13 sends an instruction to the reclaimed water pump 12 for frequency conversion adjustment by collecting a feedback signal of the flowmeter 8, and when the flow rate meets the requirement, the pre-spraying function is realized; when the cation bed/mixed bed enters the regeneration procedure, beatingThe acid outlet regulating valve of the acid metering tank is opened, the flow of the regenerated water pump 12 is flexibly regulated by using a frequency converter, signals of the concentration meter 10 are tracked by using PID (proportion integration differentiation) under different flow requirements, and the opening degree of the acid outlet regulating valve 7 of the acid metering tank is automatically regulated, so that the acid outlet regulating valve is ensured to be opened at different flows and different H2SO4Under the condition of concentration according to concentrated H2SO4The regeneration curve fundamentally realizes the concentration of H2SO4Performing multi-step DCS control, and regenerating cation resin in an cation bed/mixed bed; in the regeneration process, the corrosion-resistant check valve 5 can prevent desalted water from flowing back to the metering tank to cause the equipment to be heated, corroded and damaged due to damage of an ejector, misoperation, insufficient pressure of a regenerated water pump and the like.
Claims (8)
1. DCS controls dense H2SO4The device for multi-step regeneration and automatic acid addition is characterized by comprising concentrated H2SO4Storage tank (1), said rich H2SO4An outlet of the storage tank (1) is connected with an inlet of the acid metering box (4), an outlet of the acid metering box (4) is connected with an inlet of the ejector (9), an acid metering box acid outlet adjusting valve (7) used for adjusting different flow rates is arranged between the acid metering box (4) and the ejector (9), an outlet of the regenerated water pump (12) is connected with an inlet of the ejector (9), and an outlet of the ejector (9) is connected with the anode bed/mixed bed.
2. A DCS control rich H in accordance with claim 12SO4Device for multi-step regeneration and automatic acid addition, characterized in that the concentrated H is2SO4A storage tank acid outlet pneumatic valve (2) and an acid metering box acid inlet pneumatic valve (3) are arranged between the storage tank (1) and the acid metering box (4).
3. A DCS control rich H in accordance with claim 22SO4The device for multi-step regeneration and automatic acid addition is characterized in that an acid metering tank liquid level meter (11) is arranged on the acid metering tank (4), and the storage tank acid outlet pneumatic valve (2), the acid metering tank acid inlet pneumatic valve (3) and the acid metering tank (4) are subjected to liquid level interlocking protection.
4. According to claim 3The DCS controls the concentrated H2SO4The device for multi-step regeneration and automatic acid addition is characterized in that a flowmeter (8) is arranged between the regenerated water pump (12) and the ejector (9), and an acid concentration meter (10) is arranged between the ejector (9) and the cation bed/mixed bed;
the acid metering box acid outlet regulating valve (7), the regenerated water pump (12), the flowmeter (8), the acid concentration meter (10), the acid metering box liquid level meter (11), the storage tank acid outlet pneumatic valve (2) and the acid metering box acid inlet pneumatic valve (3) are electrically connected with the DCS control system (13).
5. A DCS control rich H in accordance with claim 12SO4The device for multi-step regeneration and automatic acid addition is characterized in that the acid metering tank liquid level meter (11) has an LS liquid level alarm function.
6. A DCS control rich H in accordance with claim 12SO4The device for multi-step regeneration and automatic acid addition is characterized in that a corrosion-resistant check valve (5) and an acid outlet manual valve (6) of the acid metering tank are arranged between the acid metering tank (4) and the acid outlet regulating valve (7) of the acid metering tank.
7. A DCS control rich H in accordance with claim 12SO4The device for multi-step regeneration and automatic acid addition is characterized in that the regeneration water pump (12) is provided with a variable frequency setting.
8. A DCS control rich H in accordance with claim 12SO4The device for multi-step regeneration and automatic acid addition is characterized in that the acid metering tank (4) is a regulating valve with an opening-adjustable function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920508861.9U CN210171460U (en) | 2019-04-16 | 2019-04-16 | Device for controlling multi-step regeneration of concentrated sulfuric acid and automatically adding acid by DCS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920508861.9U CN210171460U (en) | 2019-04-16 | 2019-04-16 | Device for controlling multi-step regeneration of concentrated sulfuric acid and automatically adding acid by DCS |
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| Publication Number | Publication Date |
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| CN210171460U true CN210171460U (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920508861.9U Active CN210171460U (en) | 2019-04-16 | 2019-04-16 | Device for controlling multi-step regeneration of concentrated sulfuric acid and automatically adding acid by DCS |
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| CN (1) | CN210171460U (en) |
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2019
- 2019-04-16 CN CN201920508861.9U patent/CN210171460U/en active Active
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