CN114538565B - Residual water production quantity prediction system in reverse osmosis device cleaning period - Google Patents
Residual water production quantity prediction system in reverse osmosis device cleaning period Download PDFInfo
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- CN114538565B CN114538565B CN202210242631.9A CN202210242631A CN114538565B CN 114538565 B CN114538565 B CN 114538565B CN 202210242631 A CN202210242631 A CN 202210242631A CN 114538565 B CN114538565 B CN 114538565B
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The invention discloses a residual water production prediction system in a reverse osmosis device cleaning period, which comprises a reverse osmosis device historical average water production constant block, a switching value constant block, a reverse osmosis device real-time water production flow analog input block, a reverse osmosis device high-pressure water supply pump running state switching value input block, a reverse osmosis device finishing chemical cleaning switching value input block, a first alternative switching block, an accumulation block, a first pulse block, a first delay block, a second alternative switching block, a first subtracting block, an absolute value block, a first dividing block, a comparison equal block, a second subtracting block, a third alternative switching block, a fourth alternative switching block, an adding block, a first comparison greater block, a fifth alternative switching block, a second dividing block, a residual water production analog output block in the reverse osmosis device cleaning period and a new historical average water production analog output block of the reverse osmosis device.
Description
Technical Field
The invention belongs to the technical field of thermal control of water treatment systems, and relates to a residual water production prediction system in a reverse osmosis device cleaning period.
Background
At present, in water treatment systems of various industries, the reverse osmosis device is widely applied as a desalting treatment process. Although the pretreatment process of reverse osmosis influent water is mature, the occurrence of reverse osmosis membrane pollution is unavoidable, so that the recovery cleaning time of the reverse osmosis membrane is particularly important. In the actual production process, an operator can comprehensively judge whether the reverse osmosis membrane needs to be subjected to restorative cleaning or not only by comprehensively judging the operation parameters such as the water inlet pressure, the pressure difference between sections, the water production flow and the like of the reverse osmosis membrane, a specific time point of restorative cleaning of the reverse osmosis membrane cannot be directly predicted, and the restorative cleaning period of the reverse osmosis device cannot be accurately controlled, so that the restorative cleaning lacks of planning and timeliness.
Disclosure of Invention
The present invention aims to overcome the drawbacks of the prior art and provides a system for predicting the residual water production in the cleaning cycle of a reverse osmosis device, which can predict the residual water production of the reverse osmosis device before the next recovery cleaning.
In order to achieve the above purpose, the residual water production prediction system in the reverse osmosis device cleaning period of the invention comprises a reverse osmosis device historical average water production constant block, a switching value constant block, a reverse osmosis device real-time water production flow analog input block, a reverse osmosis device high-pressure water supply pump running state switching value input block, a reverse osmosis device finishing chemical cleaning switching value input block, a first alternative switching block, an accumulation block, a first pulse block, a first delay block, a second alternative switching block, a first subtraction block, an absolute value block, a first division block, a comparison equal block, a second subtraction block, a third alternative switching block, a fourth alternative switching block, an addition block, a first comparison greater block, a fifth alternative switching block, a second division block, a residual water production analog output block in the reverse osmosis device cleaning period and a new historical average water production analog output block;
the output ends of the historical average water production constant block, the switching value constant block and the second division block of the reverse osmosis device are connected with the input end of the first two-choice switching block, and the output end of the first two-choice switching block is connected with the input end of the third two-choice switching block, the input end of the first division block, the input end of the first subtraction block, the input end of the second subtraction block and the input end of the addition block;
the reverse osmosis device completes the chemical cleaning of the input block of the switching value and is connected with the input end of the first delay block and the input end of the second alternative switching block, the output end of the first delay block is connected with the input end of the accumulation block through the first pulse block, the real-time water flow analog input block of the reverse osmosis device and the high-pressure water supply pump running state switching value input block of the reverse osmosis device are connected with the input end of the accumulation block, and the output end of the accumulation block is connected with the input end of the second alternative switching block and the input end of the second subtracting block;
the output end of the second alternative switching block is connected with the input end of the first subtracting block, the input end of the comparison equal block and the input end of the third alternative switching block, the output end of the first subtracting block is connected with the input end of the first dividing block through the absolute value block, the output end of the first dividing block and the input end of the comparison equal block are connected with the input end of the fourth alternative switching block, the output end of the fourth alternative switching block is connected with the input end of the first comparison block, the output end of the first comparison block is connected with the input end of the third alternative switching block, the output end of the third alternative switching block is connected with the input end of the adding block, the output end of the second dividing block is connected with the input end of the second dividing block, the output end of the second dividing block is connected with the new historical average water yield analog output block of the reverse osmosis device and the input end of the fifth alternative switching block, the reverse osmosis device is connected with the output end of the fifth alternative switching block, and the residual water yield is connected with the analog output end of the fifth alternative switching block.
The device also comprises a reverse osmosis device high-pressure feed pump frequency analog input block, a reverse osmosis device inter-section differential pressure analog input block, a second comparison larger block, a third comparison larger block, a fourth comparison larger block, a comparison smaller block, a first and block, a second delay block, a second pulse block, a third delay block, a first RS trigger block, a third and block, a second RS trigger block and a reverse osmosis device completion chemical cleaning switching value output block;
the input end of the second delay block is connected with the input end of the second delay block and the input end of the third delay block, the output end of the second delay block is connected with the R pin of the first RS trigger block and the R pin of the second RS trigger block through the second pulse block, the output end of the first and blocks are connected with the S pin of the first RS trigger block, the output end of the third delay block and the output end of the first RS trigger block are connected with the input end of the second and blocks, and the output end of the second and blocks is connected with the input end of the second delay block and the input end of the third delay block through the S pin of the second RS trigger block.
The output of the fourth alternative switching block is compared with the fixed value of 0.05 through the first comparison larger than the block.
The output of the second alternative switching block is compared to the constant value 0.
The output of the addition block is divided by a constant value 2 of the second division block.
The delay time of the first delay block is 5s, and the pulse time of the first pulse block is 0.5s.
The output of the frequency analog input block of the high-pressure water supply pump of the reverse osmosis device is larger than the block and is selected from a preset value of 40Hz through the second comparison.
The output of the pressure difference analog input block among the reverse osmosis device segments is subjected to large value selection between the third larger block and a preset value 160 kPa.
The output value of the frequency analog input block of the high-pressure water supply pump of the reverse osmosis device is subjected to large value selection between a fourth relatively larger block and a preset value of 40 Hz.
The output of the pressure difference analog input block among the reverse osmosis device sections is smaller than the block and is smaller than the preset value 90kPa for small value selection.
The pulse time of the second pulse block is 5s.
The delay time of the second delay block is 200s.
The delay time of the third delay block is 180s.
The invention has the following beneficial effects:
when the residual water production prediction system in the reverse osmosis device cleaning period is specifically operated, the residual water production in the reverse osmosis device cleaning period is monitored in real time in a mode of an analog circuit, so that the overall running state of the reverse osmosis device in the cleaning period is controlled, the recovery cleaning of the reverse osmosis device is performed in a planned manner, the occurrence of shutdown accidents of the water treatment system caused by sudden recovery cleaning operation is avoided, and the safety and stability of the water treatment system are improved. In addition, as the service time of the reverse osmosis membrane is prolonged, the method can continuously carry out superposition calculation update on the historical average water production of the reverse osmosis device, and can be used as a reference judgment basis for the running condition of the pretreatment system of the reverse osmosis device while further improving the prediction accuracy of the residual water production.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the calculation of the frequency analog of the high pressure feedwater pump of the reverse osmosis plant.
Wherein, the liquid crystal display device comprises a liquid crystal display device, the method comprises the steps of 1, namely a historical average water production constant block of the reverse osmosis device, 2, namely a switching value constant block, 3, namely a real-time water production flow analog input block of the reverse osmosis device, 4, namely a switching value input block of a high-pressure water supply pump of the reverse osmosis device, 5, namely a chemical cleaning switching value input block of the reverse osmosis device, 6, namely a first second switching block, 7, namely a accumulating block, 8, namely a first pulse block, 9, namely a first delay block, 10, namely a second switching block, 11, namely a first subtracting block, 12, namely an absolute value block, 13, namely a first dividing block, 14, namely a comparison block, 15, namely a second subtracting block, 16, namely a third second switching block, 17, namely a fourth switching block, 18, an adding block, 19, namely a first comparison block, 20, namely a fifth switching block the method comprises the steps of 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37 and 38, and is a reverse osmosis device cleaning cycle.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, but not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the accompanying drawings, there is shown a schematic structural diagram in accordance with a disclosed embodiment of the invention. The figures are not drawn to scale, wherein certain details are exaggerated for clarity of presentation and may have been omitted. The shapes of the various regions, layers and their relative sizes, positional relationships shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required.
Referring to fig. 1 and 2, the residual water production prediction system in the cleaning cycle of the reverse osmosis device according to the present invention includes a historical average water production constant block 1 of the reverse osmosis device, a switching value constant block 2, a real-time water production flow analog input block 3 of the reverse osmosis device, a switching value input block 4 of the high-pressure water supply pump running state of the reverse osmosis device, a finishing chemical cleaning switching value input block 5 of the reverse osmosis device, a first second switching value output block 6, an accumulating block 7, a first pulse block 8, a first delay block 9, a second switching value 10, a first subtracting block 11, an absolute value block 12, a first dividing block 13, a comparison and equal block 14, a second subtracting block 15, a third switching value 16, a fourth switching value 17, an adding block 18, a first comparing and larger block 19, a fifth switching value block 20, a second dividing block 21, a residual water production analog output block 22 in the cleaning cycle of the reverse osmosis device, a new average water production analog output block 23 of the reverse osmosis device, a high-pressure water supply pump frequency analog input block 24 of the reverse osmosis device, a second delay block 26, a second comparing and a second delay block 35, a third switching value input block 33, a second comparing and a third switching value block 35, a third switching value block 33, a third switching value 37 and a third switching value block 35, a third switching value input block 31, a third switching value block 35, a third switching value 37 and a third switching value trigger block 30;
the output ends of the reverse osmosis device history average water production constant block 1, the switching value constant block 2 and the second division block 21 are connected with the input end of the first two-by-one switching block 6, and the output end of the first two-by-one switching block 6 is connected with the input end of the third two-by-one switching block 16, the input end of the first division block 13, the input end of the first subtraction block 11, the input end of the second subtraction block 15 and the input end of the addition block 18;
the reverse osmosis device is used for completing the connection of the chemical cleaning switching value input block 5 with the input end of the first delay block 9 and the input end of the second alternative switching block 10, the output end of the first delay block 9 is connected with the input end of the accumulation block 7 through the first pulse block 8, the reverse osmosis device is used for producing the water flow analog quantity input block 3 in real time, the reverse osmosis device is used for controlling the switching value input block 4 in the running state of the high-pressure water supply pump and is connected with the input end of the accumulation block 7, and the output end of the accumulation block 7 is connected with the input end of the second alternative switching block 10 and the input end of the second subtracting block 15;
the output end of the second alternative switching block 10 is connected with the input end of the first subtracting block 11, the input end of the comparison equal block 14 and the input end of the third alternative switching block 16, the output end of the first subtracting block 11 is connected with the input end of the first dividing block 13 through the absolute value block 12, the output end of the first dividing block 13 and the input end of the comparison equal block 14 are connected with the input end of the fourth alternative switching block 17, the output end of the fourth alternative switching block 17 is connected with the input end of the first comparison larger block 19, the output end of the first comparison larger block 19 is connected with the input end of the third alternative switching block 16, the output end of the third alternative switching block 16 is connected with the input end of the adding block 18, the output end of the adding block 18 is connected with the input end of the second dividing block 21, the output end of the second dividing block 21 is connected with the input end of the new historical average water making analog quantity output block 23 of the reverse osmosis device and the input end of the fifth alternative switching block 20, the output end of the reverse osmosis device is connected with the output end of the fifth alternative switching block 20, and the output end of the reverse osmosis device 5 is connected with the output end of the fifth alternative switching block 20, and the output end of the reverse osmosis device is connected with the output end of the fifth alternative switching block 20.
The pressure difference analog input block 25 between the reverse osmosis device segments is connected with the input end of the third comparison larger block 27 and the input end of the comparison smaller than the block 29, the reverse osmosis device high-pressure water supply pump frequency analog input block 24 is connected with the input end of the second comparison larger block 26 and the input end of the fourth comparison larger block 28, the output end of the second comparison larger block 26 and the output end of the third comparison larger block 27 are connected with the input end of the first and block 30, the output end of the fourth comparison larger block 28 and the output end smaller than the block 29 are connected with the input end of the second and block 31, the output end of the second and block 31 is connected with the input end of the second delay block 32 and the input end of the third delay block 34, the output end of the second delay block 32 is connected with the R pin of the first RS trigger block 35 and the R pin of the second RS trigger block 37 through the second pulse block 33, the output end of the first and block 30 is connected with the S pin of the first RS trigger block 35, the output end of the third delay block 34 is connected with the S pin of the first RS trigger block 35, and the output end of the third delay block 34 is connected with the second RS trigger block 37 through the second pin of the second RS trigger block 37, and the output end of the second delay block 36 is connected with the second RS trigger block 37, and the output end of the second trigger block 37 is connected with the second trigger block 37 and the second trigger block is connected with the input end of the second RS trigger device.
The prediction conditions of the residual water production amount in the cleaning period of the reverse osmosis device comprise: determining the value of a historical average water production constant block 1 of the reverse osmosis device according to the historical operation parameters of the reverse osmosis device; the difference value between the real-time water flow rate accumulation value of the reverse osmosis device and the reverse osmosis historical average water production amount is the residual water production amount; re-calculating the new historical average water production amount of the reverse osmosis device according to whether the difference value between the accumulated water production amount and the historical average water production amount exceeds 5% in one cleaning period of the reverse osmosis device; the reverse osmosis unit completed chemical cleaning switch output block 38 indicates that the reverse osmosis unit performs a chemical cleaning operation, and is used as a condition for clearing the accumulated value of the real-time water production flow of the reverse osmosis unit in one cleaning period, and is also used as a reset condition for the residual water production amount in the cleaning period of the reverse osmosis unit.
Determining the historical average water production amount in each cleaning period of the reverse osmosis device by analyzing the historical parameters, and setting the value as the output value of the historical average water production amount constant block 1 of the reverse osmosis device; the switching value constant block 2 outputs 0 when being used for the first time, and then outputs 1 all the time, and at the moment, the historical average water production constant block 1 of the reverse osmosis device outputs through the first two-choice switching block 6.
When the output of the switching value input block 4 of the running state of the high-pressure water supply pump of the reverse osmosis device is 1, the high-pressure pump is in a running state and the input enabling end of the accumulation block 7 is activated, and at the moment, the real-time water production flow analog input block 3 of the reverse osmosis device performs water production flow accumulation through the accumulation block 7 and then is input into the second subtraction block 15 together with the output value of the first switching block 6 for subtraction calculation.
The output value of the accumulation block 7 and the output value of the reverse osmosis device finishing chemical cleaning switching value input block 5 are respectively input to the first input end and the input enabling end of the second alternative switching block 10, and because the historical average water production amount of the reverse osmosis device should remain unchanged in the same cleaning period, the new historical average water production amount is recalculated according to the relation between the accumulation value of the accumulation block 7 and the historical average water production amount of the reverse osmosis device only after finishing one chemical cleaning of the reverse osmosis device (namely, the reverse osmosis device finishing chemical cleaning switching value input block 5 outputs 1), so that the second input end of the second alternative switching block 10 is preset to be 0.
When the output of the chemical cleaning switching value input block 5 of the reverse osmosis device is 0, it means that the reverse osmosis device does not complete chemical cleaning and is in a cleaning period. At this time, the output of the fifth alternative switching block 20 is the calculated value of the second subtracting block 15, so as to obtain the remaining water production amount in the cleaning period of the reverse osmosis apparatus.
When the output of the chemical cleaning switching value input block 5 is 0, which means that the reverse osmosis device does not complete chemical cleaning, the output value of the second alternative switching block 10 is 0, after comparing the comparison value with the comparison value equal to the comparison value of the blocks 14 and 0, the input enabling end of the fourth alternative switching block 17 is triggered and output 0, and then after comparing the first comparison value greater than the block 19 with the constant value of 0.05, when the output of the first comparison value greater than the block 19 is 0, the input enabling end of the third alternative switching block 16 is not activated, so that the output end of the third alternative switching block 16 is the output value of the first alternative switching block 6; at this time, the output value of the third alternative switching block 16 and the output value of the first alternative switching block 6 are the same value, and are jointly used as the input of the adding block 18, and are calculated by the adding block 18 and the second dividing block 21 and then input into the new historical average water production analog output block 23 of the reverse osmosis device, so that the obtained historical average water production of the reverse osmosis device is kept unchanged, and the calculation of the residual water production of the reverse osmosis device in the same period is not affected.
When the reverse osmosis device finishes the output of the chemical cleaning switching value input block 5 is 1, the output value of the second alternative switching block 10 is the accumulated value of the accumulating block 7, and the accumulated value can be regarded as the reverse osmosis accumulated water production amount at the end of the cleaning period. At this time, the output value of the first alternative switching block 6 and the output value of the second alternative switching block 10 are subtracted by the first subtracting block 11, and then substituted into the absolute value block 12 to take the absolute value. The output value of the absolute value block 12 and the output value of the first two-choice switching block 6 are subjected to division operation by a first division block 13, so that the relative error between the accumulated water production amount of the reverse osmosis device and the historical average water production amount of the reverse osmosis device at the end of the cleaning period is calculated.
Because the input enabling end of the fourth alternative switching block 17 is not triggered, the output of the fourth alternative switching block 17 is the output value of the first division block 13, the output of the fourth alternative switching block 17 is compared with the fixed value 0.05 through the first comparison greater than block 19, when the relative error is smaller than 0.05, the output of the first comparison greater than block 19 is 0, the input enabling end of the third alternative switching block 16 is not activated, the output of the third alternative switching block 16 is the output value of the first alternative switching block 6, the output value is the historical average water making amount of the reverse osmosis device, and after the output ends of the third alternative switching block 16 and the first alternative switching block 6 are jointly calculated through the addition block 18 and the second division block 21, the obtained output value is input into a new historical average water making amount analog output block 23 of the reverse osmosis device, and at this time, the historical average water making amount of the reverse osmosis device is indicated to be kept unchanged; when the relative error is greater than 0.05, the output of the first comparison greater than block 19 is 1, the input enabling end of the third alternative switching block 16 is activated, at this time, the output of the third alternative switching block 16 is the output value of the second alternative switching block 10, the output value of the first alternative switching block 6 and the output value of the second alternative switching block 10 are calculated by the adding block 18 and the second dividing block 21, and finally input to the new historical average water production analog output block 23 of the reverse osmosis device, at this time, the new historical average water production of the reverse osmosis device is represented, and meanwhile, the new historical average water production of the reverse osmosis device is substituted into the first input end of the first alternative switching block 6 to be used as the historical average water production of the reverse osmosis device in the next cleaning period, and the calculation of the residual water production in the cleaning period of the reverse osmosis device is participated.
When the output of the chemical cleaning switching value input block 5 is completed by the reverse osmosis device and is 1, the input enabling end of the fifth alternative switching block 20 is activated, the output of the fifth alternative switching block 20 is the calculated value of the second division block 21, the residual water production amount in the cleaning period of the reverse osmosis device is reset, and finally the reset water production amount is input to the residual water production amount analog output block 22 in the cleaning period of the reverse osmosis device, and at the moment, the residual water production amount of the reverse osmosis device in the new cleaning period is obtained.
When the output of the chemical cleaning switching value output block 38 is 1, the output is delayed by 5 seconds by the first delay block 9 and then is input into the first pulse block 8, the pulse time is 0.5s, and then is input into the reset end of the accumulation block 7, and the accumulated value of the water flow produced by the reverse osmosis device is cleared.
The output of the reverse osmosis device high-pressure water supply pump frequency analog input block 24 is larger than the block 26 through the second comparison and is selected with a preset value of 40Hz, the output of the reverse osmosis device inter-section pressure difference analog input block 25 is larger than the block 27 through the third comparison and is selected with a preset value of 160kPa, when the output is simultaneously met, the output value of the first and the block 30 is 1, and the first RS trigger block 35 outputs 1, so that the reverse osmosis device is stable in operation, the inter-section pressure difference reaches the chemical cleaning condition, and chemical cleaning needs to be performed as soon as possible.
The output of the reverse osmosis device high-pressure feed pump frequency analog input block 24 is subjected to large value selection through a fourth comparison larger than the block 28 and a preset value of 40Hz, the output of the reverse osmosis device inter-section differential pressure analog input block 25 is subjected to large value selection through a third comparison larger than the block 27 and a preset value of 90kPa, when the output is met, the output value of the second and block 31 is 1, the output of the second and block 31 is delayed for 180 seconds through a third delay block 34, the output of the second and block 31 is subjected to output of 1 through a third and block 36, the output value of the third and block 36 triggers the second RS trigger block 37 to output 1, and then the reverse osmosis device completes the output of the chemical cleaning switching value output block 38 to output 1, so that the reverse osmosis device is stable in operation, the chemical cleaning is completed, and the operation of the next cleaning period is started.
After the output value 1 of the second AND block 31 is delayed for 200s by the third delay block 34, the delayed value is input into the second pulse block 33, and the pulse time is 5s; and then input to the first RS trigger block 35 and the second RS trigger block 37 respectively, and reset the first RS trigger block 35 and the second RS trigger block 37, which means that when chemical cleaning is completed once, the chemical cleaning state is reset, so that statistics of the chemical cleaning state is convenient to be performed when cleaning is started next time.
The output value of the reverse osmosis device finishing chemical cleaning switching value output block 38 is the input value of the reverse osmosis device finishing chemical cleaning switching value input block 5, and the output value of the reverse osmosis device inter-section differential pressure analog input block 25 is one section differential pressure value or two sections differential pressure value of the reverse osmosis device.
Claims (2)
1. The residual water production prediction system in the reverse osmosis device cleaning period is characterized by comprising a reverse osmosis device historical average water production constant block (1), a switching value constant block (2), a reverse osmosis device real-time water production flow analog quantity input block (3), a reverse osmosis device high-pressure water supply pump running state switching value input block (4), a reverse osmosis device finishing chemical cleaning switching value input block (5), a first alternative switching value (6), an accumulation block (7), a first pulse block (8), a first delay block (9), a second alternative switching value (10), a first subtraction block (11), an absolute value block (12), a first division block (13), a comparison and equalization block (14), a second subtraction block (15), a third alternative switching value (16), a fourth alternative switching value (17), an addition block (18), a first comparison and equalization block (19), a fifth alternative switching value (20), a second alternative switching value (21), a residual water production analog quantity output block (22) in the reverse osmosis device cleaning period and a new average water production analog quantity output block (23);
the output ends of the historical average water production constant block (1), the switching value constant block (2) and the second division block (21) of the reverse osmosis device are connected with the input end of the first two-choice switching block (6), and the output end of the first two-choice switching block (6) is connected with the input end of the third two-choice switching block (16), the input end of the first division block (13), the input end of the first subtraction block (11), the input end of the second subtraction block (15) and the input end of the addition block (18);
the reverse osmosis device is used for completing that a chemical cleaning switching value input block (5) is connected with the input end of a first delay block (9) and the input end of a second alternative switching block (10), the output end of the first delay block (9) is connected with the input end of an accumulation block (7) through a first pulse block (8), a real-time water flow analog input block (3) of the reverse osmosis device and a high-pressure water supply pump running state switching value input block (4) of the reverse osmosis device are connected with the input end of the accumulation block (7), and the output end of the accumulation block (7) is connected with the input end of the second alternative switching block (10) and the input end of a second subtraction block (15);
the output end of the second alternative switching block (10) is connected with the input end of the first subtracting block (11), the input end of the comparison equal block (14) and the input end of the third alternative switching block (16), the output end of the first subtracting block (11) is connected with the input end of the first dividing block (13) through the absolute value block (12), the output end of the first dividing block (13) and the input end of the comparison equal block (14) are connected with the input end of the fourth alternative switching block (17), the output end of the fourth alternative switching block (17) is connected with the input end of the first comparison larger than the block (19), the output end of the first comparison larger than block (19) is connected with the input end of a third two-choice switching block (16), the output end of the third two-choice switching block (16) is connected with the input end of an addition block (18), the output end of the addition block (18) is connected with the input end of a second division block (21), the output end of the second division block (21) is connected with the input ends of a new historical average water production analog output block (23) and a fifth two-choice switching block (20) of a reverse osmosis device, the reverse osmosis device is connected with the input ends of a chemical cleaning switching value input block (5) and a second subtraction block (15) and a fifth two-choice switching block (20), the output end of the fifth alternative switching block (20) is connected with a residual water production analog output block (22) in the reverse osmosis device cleaning period;
the device also comprises a reverse osmosis device high-pressure water supply pump frequency analog input block (24), a reverse osmosis device inter-section pressure difference analog input block (25), a second bigger block (26), a third bigger block (27), a fourth bigger block (28), a smaller block (29), a first and block (30), a second and block (31), a second delay block (32), a second pulse block (33), a third delay block (34), a first RS trigger block (35), a third and block (36), a second RS trigger block (37) and a reverse osmosis device completion chemical cleaning switching value output block (38);
the input end of the differential pressure analog quantity input block (25) between the reverse osmosis device sections is connected with the input end of a third larger than block (27) and the input end of a smaller than block (29), the input end of the reverse osmosis device high-pressure water supply pump frequency analog quantity input block (24) is connected with the input end of a second larger than block (26) and the input end of a fourth larger than block (28), the output end of the second larger than block (26) and the output end of the third larger than block (27) are connected with the input end of a first and block (30), the output end of a fourth larger than block (28) and the output end of a smaller than block (29) are connected with the input end of a second and block (31), the output end of the second and block (31) is connected with the input end of a second delay block (32) and the input end of a third delay block (34), the output end of the second delay block (32) is connected with an R trigger pin of a first RS trigger block (35) and the R trigger pin of the second delay block (33) through a second pulse block (36) and the output pin of the second delay block (37) and the second trigger block (37) is connected with the output pin of the second trigger block (37) and the third trigger block (35), the output end of the second RS trigger block (37) is connected with a chemical cleaning switching value input block (5) of the reverse osmosis device through a chemical cleaning switching value output block (38) of the reverse osmosis device;
the output of the fourth alternative switching block (17) is compared with a fixed value of 0.05 through a first comparison greater than block (19);
the delay time of the first delay block (9) is 5s, and the pulse time of the first pulse block (8) is 0.5s;
the output of the frequency analog input block (24) of the high-pressure water supply pump of the reverse osmosis device is subjected to large value selection between a second comparison larger than block (26) and a preset value of 40 Hz;
the output of the differential pressure analog input block (25) among the reverse osmosis device sections is subjected to large value selection between a third larger block (27) and a preset value 160 kPa;
the output value of the frequency analog input block (24) of the high-pressure water supply pump of the reverse osmosis device is subjected to large value selection between a fourth larger block (28) and a preset value of 40 Hz;
the output of the pressure difference analog input block (25) among the reverse osmosis device sections is smaller than the output of the block (29) and is selected from a preset value of 90 kPa;
the pulse time of the second pulse block (33) is 5s.
2. The system for predicting residual water production during a reverse osmosis unit wash cycle of claim 1,
the output of the second alternative switching block (10) is compared with a constant value 0 by a comparison equal block (14);
the output of the adding block (18) is divided by a fixed value 2 of the second dividing block (21);
the delay time of the second delay block (32) is 200s;
the delay time of the third delay block (34) is 180s.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012081746A1 (en) * | 2010-12-16 | 2012-06-21 | 광주과학기술원 | System and method for membrane fouling diagnosis in a water-treatment process using a kalman filter algorithm |
| GB201501243D0 (en) * | 2014-08-12 | 2015-03-11 | Membrane Recovery Ltd | Forward osmotic and water hammer method of membrane cleaning |
| WO2020245491A1 (en) * | 2019-06-04 | 2020-12-10 | Wärtsilä Finland Oy | Method and apparatus for controlling fresh water generation system of marine vessel |
| CN113477097A (en) * | 2021-07-20 | 2021-10-08 | 清华大学 | Device and method for predicting reverse osmosis membrane fouling |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4902763B2 (en) * | 2009-10-06 | 2012-03-21 | シャープ株式会社 | Water purifier |
| CN106115961A (en) * | 2016-08-03 | 2016-11-16 | 江吉安 | A kind of analysis method in filter element of water purifier life-span |
| CN107875730A (en) * | 2017-12-12 | 2018-04-06 | 上海浩泽净水科技发展有限公司 | Water purifier with filter element life monitoring device and filter element life monitoring method |
| CN108261927A (en) * | 2018-01-10 | 2018-07-10 | 九阳股份有限公司 | A kind of life detecting method of the reverse osmosis filter core of water purifier |
| CN214670192U (en) * | 2021-06-02 | 2021-11-09 | 山东乐齐医疗科技有限公司 | Intelligent controller of reverse osmosis water purifier |
-
2022
- 2022-03-11 CN CN202210242631.9A patent/CN114538565B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012081746A1 (en) * | 2010-12-16 | 2012-06-21 | 광주과학기술원 | System and method for membrane fouling diagnosis in a water-treatment process using a kalman filter algorithm |
| GB201501243D0 (en) * | 2014-08-12 | 2015-03-11 | Membrane Recovery Ltd | Forward osmotic and water hammer method of membrane cleaning |
| WO2020245491A1 (en) * | 2019-06-04 | 2020-12-10 | Wärtsilä Finland Oy | Method and apparatus for controlling fresh water generation system of marine vessel |
| CN113477097A (en) * | 2021-07-20 | 2021-10-08 | 清华大学 | Device and method for predicting reverse osmosis membrane fouling |
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