CN110563085A - Intelligent resin scrubbing end point detection device and method - Google Patents
Intelligent resin scrubbing end point detection device and method Download PDFInfo
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- CN110563085A CN110563085A CN201910884769.7A CN201910884769A CN110563085A CN 110563085 A CN110563085 A CN 110563085A CN 201910884769 A CN201910884769 A CN 201910884769A CN 110563085 A CN110563085 A CN 110563085A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Water Supply & Treatment (AREA)
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- Treatment Of Water By Ion Exchange (AREA)
Abstract
An intelligent resin scrubbing end point detection device and method are disclosed, wherein special sampling pipes are connected to a resin separation tower, a female tower and a male tower middle drainage main pipe in a power plant fine treatment in-vitro regeneration system, the resin scrubbing end point detection device is installed on the sampling pipes, and an electromagnetic valve interlocked with a power plant program control system is arranged to control when the detection device is put into use; the resin scrubbing end point detection device detects the quantity of the particulate matters in the scrubbing waste liquid on line, and transmits the on-off information of the electromagnetic valve and the detection result of the quantity of the particulate matters in the scrubbing waste liquid into a program control system of the power plant; determining equipment which is performing resin scrubbing through the combination of the opening and closing conditions of the air inlet valve and the middle drain valve, and simultaneously detecting the amount of particles of scrubbing waste liquid to judge the end point of the tower resin scrubbing so as to determine the times required by the tower resin scrubbing; the invention aims to save energy, reduce emission, reduce the water consumption for resin regeneration, prolong the period water making of a fine treatment mixed bed and prolong the service life of resin.
Description
Technical Field
The invention relates to a power plant condensed water and hydrophobic fine treatment in-vitro regeneration system, in particular to a scrubbing endpoint intelligent detection device and method for scrubbing in-vitro regeneration resin.
Background
The main process for regenerating the resin of the domestic power plant fine treatment system comprises the step of air scrubbing, the ineffective resin in the separation tower needs to be scrubbed by air to remove adsorbed corrosion products and suspended matters, and the positive resin and the negative resin separated in the positive tower and the negative tower need to be scrubbed by air to remove fine resin. The purpose of air scrubbing is to avoid the blockage of the surface gaps of the resin by removing corrosion products, suspended matters, fine particles and the like, so that the resin can be fully contacted with the regeneration liquid, and the regeneration effect is improved.
At present, the air scrubbing performed by domestic power plants is preset cycle times according to experience. This mode of operation has certain drawbacks because the concentration of corrosion products and suspended matter in the feed water to the polishing system, and the amount of finely divided resin intermixed in the spent resin, are constantly changing. If a fixed air scrubbing frequency is set, when the quantity of corrosion products and particles in inlet water is high, the incomplete scrubbing can occur, the regeneration effect of resin is influenced, finally, the periodic water production amount of a fine treatment mixed bed is reduced, the safe operation of a unit is influenced, and the consumption of acid, alkali and desalted water can be increased due to the increase of the regeneration frequency; when the corrosion product and the particulate matter quantity in the intaking are lower, resin itself is comparatively clean, and the predetermined number of times of scrubbing can waste a large amount of demineralized water, and can cause the wearing and tearing of resin, reduces the life-span of resin, produces more resin in small, broken bits for the power plant increases resin purchase volume, causes very big economic burden.
Therefore, although the air scrubbing process with preset cycle times is convenient to operate, the problems of reducing the periodic water production amount of the mixed bed, wasting acid and alkali and demineralized water and reducing the service life of resin can be caused, the safe operation of a unit is influenced, and the purposes of energy conservation, emission reduction, quality improvement and efficiency improvement are violated.
Disclosure of Invention
In order to solve the above problems in the prior art, an object of the present invention is to provide an intelligent resin scrubbing endpoint detection apparatus and method, which can intelligently determine a resin scrubbing endpoint to reduce water consumption for regeneration, and prolong water production and resin service life of a fine treatment mixed bed cycle.
In order to achieve the purpose, the invention adopts the following technical scheme:
An intelligent resin scrubbing end point detection device comprises special sampling pipes connected to a main drainage pipe in the middle of a resin separation tower 1, a negative tower 2 and a positive tower 3 in a power plant fine treatment in-vitro regeneration system, a resin scrubbing end point detection device 13 arranged on the special sampling pipes, and an electromagnetic valve 12 arranged at the inlet of the resin scrubbing end point detection device 13 and controlled by a power plant program control system to control when the resin scrubbing end point detection device 13 is put into use; the resin scrubbing end point detection device 13 detects the amount of particles in the scrubbing waste liquid on line, transmits the on-off information of the electromagnetic valve 12 and the detection result of the amount of particles in the scrubbing waste liquid into a program control system of a power plant, determines whether the resin is scrubbed in the resin separation tower 1, the negative tower 2 or the positive tower 3 by combining the on-off conditions of the air inlet valve and the middle drain valve of the resin separation tower 1, the negative tower 2 and the positive tower 3, simultaneously opens the electromagnetic valve 12 at the inlet of the resin scrubbing end point detection device 13, detects the amount of particles in the scrubbing waste liquid, and judges the end points of resin scrubbing in the resin separation tower 1, the negative tower 2 and the positive tower 3, thereby determining the resin scrubbing times in the resin separation tower 1, the negative tower 2 and the positive tower 3.
The resin scrubbing effect of the resin separation tower 1, the negative tower 2 and the positive tower 3 is detected by a resin scrubbing end point detecting device 13.
Preferably, the resin scrub endpoint detection device 13 is an on-line turbidity meter.
The detection method of the intelligent resin scrubbing end point detection device comprises the following specific steps: when resin scrubbing is carried out on the resin separation tower 1, the Roots blower 4 is started, the exhaust valve 14 is opened, the exhaust valve 14 is closed after 30 seconds of exhaust, the drainage valve 9 in the middle of the resin separation tower, the air inlet valve 6 of the resin separation tower and the exhaust valve 15 in the upper part of the resin separation tower 1 are opened, the air inlet amount and the pressure are adjusted by the air inlet valve 6 of the resin separation tower, and resin scrubbing in the resin separation tower 1 is carried out; when the negative tower 2 is scrubbed with resin, opening a drainage valve 10 at the middle part of the negative tower 2, an air inlet valve 7 of the negative tower and an exhaust valve 16 at the upper part of the negative tower, and regulating the air inflow and pressure by using the air inlet valve 7 of the negative tower to scrub with resin in the negative tower 2; when the male tower 3 is scrubbed with resin, opening a male tower middle drain valve 11, a male tower air inlet valve 8 and a male tower upper exhaust valve 17 of the male tower 3, and regulating air inflow and pressure by using the male tower air inlet valve 8 to scrub with resin in the male tower 3;
When the electromagnetic valve 12 is electrified, the input resin scrubbing end point detection device 13 is opened, when the program control system of the power plant detects that the drain valve 9 in the middle of the resin separation tower and the air inlet valve 6 of the resin separation tower are opened, the resin separation tower 1 is judged to be in resin scrubbing, the quantity of particles in the scrubbing waste liquid is detected at the same time, when the quantity of the particles with the particle size of more than 2 micrometers in the scrubbing waste liquid is less than or equal to 500/ml, the end of the resin scrubbing of the resin separation tower 1 is determined, the resin scrubbing end point is obtained, and the resin scrubbing frequency; when the program control system of the power plant detects that the drain valve 10 and the intake valve 7 in the middle of the negative tower are opened, the resin scrubbing of the negative tower 2 is judged, the number of particles in the scrubbing waste liquid is detected, when the number of particles with the particle size of more than 2 micrometers in the scrubbing waste liquid is less than or equal to 500/ml, the end of the resin scrubbing of the negative tower 2 is determined, namely the resin scrubbing end point, and the resin scrubbing times of the negative tower 2 are recorded; when the program control system of the power plant detects that the drain valve 11 and the intake valve 8 in the middle of the positive tower are opened, the positive tower 3 is judged to be in resin scrubbing, the number of particles in the scrubbing waste liquid is detected, when the number of particles with the particle size of more than 2 micrometers in the scrubbing waste liquid is less than or equal to 500/ml, the end of the positive tower 3 scrubbing is determined, namely the resin scrubbing end point, and the resin scrubbing times of the positive tower 3 are recorded.
Preferably, in order to prolong the service life of the resin scrubbing end point detection device 13, the resin scrubbing end point detection device 13 is not put into the resin scrubbing end point detection device 13 for the first time, the electromagnetic valve 12 is controlled to be closed by the program control system, and the drainage water in the middle drainage main pipes of the resin separation tower 1, the female tower 2 and the male tower 3 directly enters the waste resin catcher 5.
Compared with the prior art, the method has the effects of avoiding redundant scrubbing times, saving energy, reducing emission, reducing the water consumption for resin regeneration, prolonging the periodic water production of a fine treatment mixed bed, prolonging the service life of the resin and avoiding the condition of incomplete scrubbing when the quantity of corrosion products and particles in inlet water is high by intelligently detecting the resin scrubbing end point. And the resin scrubbing effect of the three towers can be detected by one resin scrubbing end point detection device 13.
drawings
FIG. 1 is a schematic diagram of an intelligent resin scrubbing endpoint detection device installed in a power plant polishing in-vitro regeneration system according to the present invention.
Detailed Description
As shown in figure 1, the invention relates to an intelligent resin scrubbing end point detection device, wherein a special sampling pipe is connected to a drainage main pipe at the middle parts of a resin separation tower 1, a negative tower 2 and a positive tower 3 in a power plant fine treatment in-vitro regeneration system, a resin scrubbing end point detection device 13 is installed on the special sampling pipe, and an electromagnetic valve 12 interlocked with a power plant program control system is arranged at the inlet of the resin scrubbing end point detection device 13 to control when the detection device 13 is put into use. The resin scrubbing end point detection device 13 has the main functions of detecting the quantity of the particulate matters in the scrubbing waste liquid on line and transmitting the on-off information of the electromagnetic valve 12 and the detection result of the quantity of the particulate matters in the scrubbing waste liquid into a program control system of a power plant. The equipment which is performing resin scrubbing is determined by the combination of the opening and closing conditions of the air inlet valve and the middle water discharge valve of the resin separation tower 1, the negative tower 2 and the positive tower 3, meanwhile, the electromagnetic valve 12 at the inlet of the resin scrubbing end point detection device 13 is opened, the quantity of particles of scrubbing waste liquid is detected, the end point of resin scrubbing of the resin separation tower 1, the negative tower 2 and the positive tower 3 is judged, and therefore the times required by resin scrubbing of the resin separation tower 1, the negative tower 2 and the positive tower 3 are determined.
the specific detection method comprises the following steps: when the power plant program control system detects that a drain valve 9 in the middle of the resin separation tower and an air inlet valve 6 of the resin separation tower are opened, the resin separation tower 1 is judged to be in resin scrubbing, the quantity of the particles in the scrubbing waste liquid is detected at the same time, when the quantity of the particles with the particle size of more than 2 microns in the scrubbing waste liquid is less than or equal to 500/ml, the end of scrubbing of the resin separation tower 1 is determined, namely the resin scrubbing end point, and the resin scrubbing frequency of the resin separation tower 1 is recorded; when the program control system of the power plant detects that the drain valve 10 and the intake valve 7 in the middle of the negative tower are opened, the resin scrubbing of the negative tower 2 is judged, the number of particles in the scrubbing waste liquid is detected, when the number of particles with the particle size of more than 2 micrometers in the scrubbing waste liquid is less than or equal to 500/ml, the end of the resin scrubbing of the negative tower 2 is determined, namely the resin scrubbing end point, and the resin scrubbing times of the negative tower 2 are recorded; when the program control system of the power plant detects that the drain valve 11 and the intake valve 8 in the middle of the positive tower are opened, the positive tower 3 is judged to be in resin scrubbing, the number of particles in the scrubbing waste liquid is detected, when the number of particles with the particle size of more than 2 micrometers in the scrubbing waste liquid is less than or equal to 500/ml, the end of the positive tower 3 scrubbing is determined, namely the resin scrubbing end point, and the resin scrubbing times of the positive tower 3 are recorded.
In order to prolong the service life of the resin scrubbing end point detection device 13, the resin scrubbing end point detection device 13 is not put into the resin scrubbing end point detection device 13 for the first time, the program control system controls the electromagnetic valve 12 to be closed, and the drainage water in the middle drainage main pipes of the resin separation tower 1, the negative tower 2 and the positive tower 3 directly enters the waste resin catcher 5.
Effect verification
The original preset cycle number of air scrubbing in a certain power plant separation tower in south is 5, and after an intelligent resin scrubbing end point detection device is additionally arranged, 4 cycles are executed in the process of air scrubbing once, and then the next sequence is executed. The recorded data of the intelligent resin scrubbing end point detection device shows that the number of particles with the particle size of more than 2 microns in the 1 st scrubbing waste liquid is 6285/ml, the number of particles with the particle size of more than 2 microns in the 2 nd scrubbing waste liquid is 3481/ml, the number of particles with the particle size of more than 2 microns in the 3 rd scrubbing waste liquid is 1470/ml, and the number of particles with the particle size of more than 2 microns in the 4 th scrubbing waste liquid is 368/ml. And tracking the operation record of air scrubbing, wherein the air scrubbing times of the power plant are more than 4 times, 3 times at the lowest time and 6 times at the highest time.
The original preset cycle number of air scrubbing in a certain power plant separation tower in the middle is 5, and after an intelligent resin scrubbing end point detection device is additionally arranged, 5 cycles are executed in the process of air scrubbing for one time, and then the next sequence is finished. The recorded data of the intelligent resin scrubbing end point detection device shows that the number of particles with the particle size of more than 2 microns in the 1 st scrubbing waste liquid is 5164/ml, the number of particles with the particle size of more than 2 microns in the 2 nd scrubbing waste liquid is 2278/ml, the number of particles with the particle size of more than 2 microns in the 3 rd scrubbing waste liquid is 944/ml, the number of particles with the particle size of more than 2 microns in the 4 th scrubbing waste liquid is 622/ml, and the number of particles with the particle size of more than 2 microns in the 5 th scrubbing waste liquid is 483/ml. And tracking the operation record of air scrubbing, wherein the air scrubbing times of the power plant are more than 6 times, 5 times at the lowest time and 8 times at the highest time.
By applying the intelligent resin scrubbing endpoint detection device, the reasonability of the air scrubbing operation parameters can be checked besides ensuring the intelligent control of the air scrubbing endpoint. For example, in a certain power plant in the middle of the power plant, the number of air scrubbing times is found to be large through tracking, the quantity of particles for scrubbing waste liquid is reduced slowly when the last circulation is executed, the scrubbing effect is poor, the information is checked, and the fact that resin in the separation tower is not sufficiently scrubbed due to the failure of the Roots blower is found to finally cause the scrubbing effect to be poor.
Claims (5)
1. an intelligent resin scrubbing endpoint detection device, characterized in that: the device comprises a special sampling pipe connected to a resin separation tower (1), a negative tower (2) and a positive tower (3) in a power plant fine treatment in-vitro regeneration system, a resin scrubbing end point detection device (13) arranged on the special sampling pipe, and an electromagnetic valve (12) arranged at the inlet of the resin scrubbing end point detection device (13) and controlled by a power plant program control system to control when the resin scrubbing end point detection device (13) is put into use; the on-line detection of the resin scrubbing end point detection device (13) detects the amount of particles in the scrubbing waste liquid, the on-off information of the electromagnetic valve (12) and the detection result of the amount of particles in the scrubbing waste liquid are transmitted to a program control system of a power plant, whether the resin scrubbing is performed on the resin separation tower (1), the negative tower (2) or the positive tower (3) is determined by combining the on-off conditions of the air inlet valve and the middle drain valve of the resin separation tower (1), the negative tower (2) and the positive tower (3), the electromagnetic valve (12) at the inlet of the resin scrubbing end point detection device (13) is opened at the same time, the amount of particles in the scrubbing waste liquid is detected, the end point of resin scrubbing in the resin separation tower (1), the negative tower (2) and the positive tower (3) is judged, and the resin scrubbing times in the resin separation tower (1), the negative tower.
2. The intelligent resin scrub endpoint detection device of claim 1, wherein: the resin scrubbing effect of the resin separation tower (1), the negative tower (2) and the positive tower (3) is detected by a resin scrubbing end point detection device (13).
3. The intelligent resin scrub endpoint detection device of claim 1, wherein: the resin scrubbing endpoint detection device (13) is an online turbidity detection instrument.
4. The method of detecting an intelligent resin scrub endpoint detection device of any of claims 1 to 3, wherein: the specific method comprises the following steps: when resin scrubbing is carried out on the resin separation tower (1), the Roots blower (4) is started, the exhaust valve (14) is opened, the exhaust valve (14) is closed after 30 seconds of exhaust, the resin separation tower middle drain valve (9), the resin separation tower air inlet valve (6) and the resin separation tower upper exhaust valve (15) of the resin separation tower (1) are opened, the resin separation tower air inlet valve (6) is used for adjusting air inflow and pressure, and resin scrubbing in the resin separation tower (1) is carried out; when the resin scrubbing is carried out on the negative tower (2), opening a drainage valve (10) in the middle of the negative tower, an air inlet valve (7) of the negative tower and an exhaust valve (16) at the upper part of the negative tower (2), and adjusting the air inflow and the pressure by using the air inlet valve (7) of the negative tower to carry out the resin scrubbing in the negative tower (2); when the male tower (3) is scrubbed with resin, opening a drain valve (11) in the middle of the male tower, an air inlet valve (8) of the male tower and an exhaust valve (17) at the upper part of the male tower (3), and adjusting the air inflow and pressure by the air inlet valve (8) of the male tower to scrub with resin in the male tower (3);
When the electromagnetic valve (12) is powered on, the electromagnetic valve is opened, and the resin scrubbing end point detection device (13) is put into the resin scrubbing device, when the power plant program control system detects that a drain valve (9) in the middle of the resin separation tower and an air inlet valve (6) of the resin separation tower are opened, the resin separation tower (1) is judged to be in resin scrubbing, the quantity of particles in scrubbing waste liquid is detected at the same time, when the quantity of the particles with the size of more than 2 micrometers in the scrubbing waste liquid is less than or equal to 500/ml, the end of the resin scrubbing of the resin separation tower (1) is determined, namely the resin scrubbing end point; when a program control system of a power plant detects that a drain valve (10) in the middle of a negative tower and an air inlet valve (7) of the negative tower are opened, the negative tower (2) is judged to be in resin scrubbing, the quantity of particles in scrubbing waste liquid is detected, when the quantity of the particles with the particle size of more than 2 micrometers in the scrubbing waste liquid is less than or equal to 500/ml, the end of scrubbing of the negative tower (2) is determined, namely a resin scrubbing end point, and the resin scrubbing times of the negative tower (2) are recorded; when the program control system of the power plant detects that the drain valve (11) and the intake valve (8) in the middle of the positive tower are opened, the positive tower (3) is judged to be in resin scrubbing, the quantity of the particles in the scrubbing waste liquid is detected, when the quantity of the particles with the particle size of more than 2 microns in the scrubbing waste liquid is less than or equal to 500/ml, the end of the resin scrubbing of the positive tower (3) is determined, and the resin scrubbing frequency of the positive tower (3) is recorded.
5. The detection method according to claim 4, characterized in that: in order to prolong the service life of the resin scrubbing end point detection device (13), the resin scrubbing end point detection device (13) is not put into the resin scrubbing first time, the program control system controls the electromagnetic valve (12) to be closed, and the drainage water in the middle drainage main pipes of the resin separation tower (1), the negative tower (2) and the positive tower (3) directly enters the waste resin catcher 5.
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| CN201910884769.7A CN110563085A (en) | 2019-09-19 | 2019-09-19 | Intelligent resin scrubbing end point detection device and method |
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| CN111036312A (en) * | 2020-01-04 | 2020-04-21 | 西安热工研究院有限公司 | Ion exchange resin regeneration monitoring control system and method |
| CN112387315A (en) * | 2020-11-23 | 2021-02-23 | 山西太钢不锈钢股份有限公司 | Efficient mixed bed regeneration method |
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Application publication date: 20191213 |