CN112604366A - Desulfurization wastewater treatment regeneration system and control method thereof - Google Patents
Desulfurization wastewater treatment regeneration system and control method thereof Download PDFInfo
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- CN112604366A CN112604366A CN202011529182.3A CN202011529182A CN112604366A CN 112604366 A CN112604366 A CN 112604366A CN 202011529182 A CN202011529182 A CN 202011529182A CN 112604366 A CN112604366 A CN 112604366A
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 77
- 230000023556 desulfurization Effects 0.000 title claims abstract description 77
- 230000008929 regeneration Effects 0.000 title claims abstract description 54
- 238000011069 regeneration method Methods 0.000 title claims abstract description 54
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003814 drug Substances 0.000 claims abstract description 60
- 239000002351 wastewater Substances 0.000 claims abstract description 58
- 238000004140 cleaning Methods 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000008213 purified water Substances 0.000 claims abstract description 38
- 238000001914 filtration Methods 0.000 claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 3
- 239000012141 concentrate Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000013043 chemical agent Substances 0.000 claims description 6
- 230000001172 regenerating effect Effects 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 3
- 238000005201 scrubbing Methods 0.000 claims description 3
- 230000003716 rejuvenation Effects 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 6
- 229940079593 drug Drugs 0.000 description 12
- 239000007789 gas Substances 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 7
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009295 crossflow filtration Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000008177 pharmaceutical agent Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- 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
- C02F2303/16—Regeneration of sorbents, filters
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a desulfurization wastewater treatment regeneration system and a control method thereof, wherein the desulfurization wastewater treatment regeneration system comprises a filtering unit and a cleaning unit, the filtering unit comprises a filter, the filter comprises a wastewater inlet, a purified water outlet and a concentrated solution outlet, the filtering unit is in fluid connection with the cleaning unit, transmembrane pressure difference is calculated according to the hydraulic pressure of the wastewater inlet, the hydraulic pressure of the purified water outlet and the hydraulic pressure of the concentrated solution outlet, and the cleaning unit is controlled to provide a medicament for the filtering unit according to the transmembrane pressure difference so as to clean the filtering unit. Desulfurization wastewater treatment regeneration system simple structure can handle the desulfurization waste water of different grade type, and the medicament can wash the filter in order to prolong the life of filter, has guaranteed the stability of desulfurization waste water treatment effect simultaneously.
Description
Technical Field
The application relates to the field of desulfurization wastewater treatment, in particular to a desulfurization wastewater treatment regeneration system in a marine diesel engine and a control method thereof.
Background
In recent years, in order to reduce the pollution of marine diesel engine exhaust gas to the environment atmosphere, the international maritime organization has made clear regulations on SOx emission limits in marine exhaust gas, and in order to meet more and more stringent marine emission standards, marine operators may choose to change to low-sulfur fuel, replace clean energy engines, install exhaust gas scrubbing desulfurization systems, and the like. The installation of flue gas scrubbing desulfurization systems has become an important choice for the mainstream shipowners worldwide for economic, safety, and other considerations. A certain amount of desulfurization wastewater can be generated in the process of washing and desulfurizing the waste gas, and the desulfurization wastewater can be discharged into the sea after being treated to reach the standard.
At present, the research on the treatment of the ship flue gas desulfurization wastewater is less, the wastewater is discharged or recycled only by a rotational flow diversion method, an adsorption method or oxidation treatment, but the structure of the treatment device for the desulfurization wastewater is complex, and the stability of the treatment effect is poor.
Disclosure of Invention
An object of an aspect of the present invention is to provide a desulfurization wastewater treatment regeneration system and a control method thereof, so as to replace a desulfurization wastewater treatment apparatus having a complicated structure and poor stability of treatment effect in the prior art.
A desulfurization wastewater treatment regeneration system, comprising: the filter unit comprises a filter, the filter is provided with a wastewater inlet, a purified water outlet and a concentrated solution outlet, the desulfurized wastewater enters the filter through the wastewater inlet and is filtered to obtain purified water and concentrated solution, the purified water is discharged through the purified water outlet, and the concentrated solution is discharged through the concentrated solution outlet; and a washing unit comprising a medicament for washing; wherein the filtration unit is in fluid connection with the wash unit; measuring the hydraulic pressure of the wastewater inlet, the hydraulic pressure of the purified water outlet and the hydraulic pressure of the concentrated solution outlet, calculating transmembrane pressure difference according to the hydraulic pressure of the wastewater inlet, the hydraulic pressure of the purified water outlet and the hydraulic pressure of the concentrated solution outlet, and controlling the cleaning unit to provide the medicament for the filtering unit according to the transmembrane pressure difference so as to clean the filtering unit.
In some embodiments, the desulfurization wastewater treatment regeneration system further comprises a pipeline evacuation channel through which desulfurization wastewater within the desulfurization wastewater treatment regeneration system is evacuated.
In some embodiments, the wash unit comprises a reservoir for storing the medicament, the medicament within the reservoir entering the filter through the waste water inlet via a medicament replenishment channel.
In some embodiments, the desulfurization wastewater treatment regeneration system further comprises a circulation cleaning channel through which the agent circulates to clean the filter.
In some embodiments, the desulfurization wastewater treatment regeneration system further comprises a reagent return channel, wherein the reagent in the filter is discharged through the concentrate outlet and flows back to the reservoir through the reagent return channel.
In some embodiments, the wash unit further comprises a source of a refill agent connected to the reservoir through a medicament refill channel to replenish the reservoir with refill agent.
The invention also provides a control method of the desulfurization wastewater treatment regeneration system, which comprises the following steps: measuring the hydraulic pressure of the wastewater inlet, the hydraulic pressure of the purified water outlet and the hydraulic pressure of the concentrated solution outlet, and calculating transmembrane pressure difference according to the hydraulic pressure of the wastewater inlet, the hydraulic pressure of the purified water outlet and the hydraulic pressure of the concentrated solution outlet; and controlling the desulfurization wastewater treatment regeneration system to perform a cleaning regeneration step according to the transmembrane pressure difference, wherein the cleaning unit provides the medicament for the filtering unit to clean the filtering unit in the cleaning regeneration step.
In some embodiments, the cleaning and regenerating step includes a pipeline evacuation step, and opening and closing of a pipeline evacuation channel are controlled according to the transmembrane pressure difference, so that the desulfurization wastewater in the desulfurization wastewater treatment and regeneration system is discharged through the pipeline evacuation channel.
In some embodiments, a chemical replenishing step is performed after the line emptying step, and the washing unit includes a reservoir for storing the chemical, the chemical in the reservoir entering the filter through the waste water inlet via a chemical replenishing channel.
In some embodiments, the medicament replenishing step is followed by a circulation cleaning step, the medicament circulating cleaning the filter through the circulation cleaning passage.
In some embodiments, the cleaning and regenerating step includes a drug backflow step, wherein opening and closing of a drug backflow channel are controlled according to the transmembrane pressure difference, so that the drug in the filter is discharged through the concentrate outlet and flows back to the reservoir through the drug backflow channel.
In some embodiments, the cleaning and regenerating step includes a medicament renewing step, and the cleaning unit includes a reservoir for storing the medicament, and the opening and closing of the medicament renewing passage is controlled according to the impurity content of the medicament to replenish the reservoir with the renewed medicament.
The invention provides a desulfurization wastewater treatment regeneration system with a simple structure and a control method thereof, which can treat desulfurization wastewater of different types, and the medicament can clean the filter to prolong the service life of the filter and ensure the stability of the treatment effect of the desulfurization wastewater.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a system block diagram of a desulfurization wastewater treatment regeneration system according to the present invention;
FIG. 2A is a schematic view of a line evacuation passageway according to the present invention;
FIG. 2B is a schematic view of a drug replenishment path according to the present invention;
FIG. 2C is a schematic view of the circulation purge path of the present invention;
FIG. 2D is a schematic view of the drug return channel of the present invention;
FIG. 3 is a system block diagram of a desulfurization wastewater treatment regeneration system of the present invention.
Reference numerals
A desulfurization wastewater treatment regeneration system 1000; a line purge passage L1;
a drug replenishment path L2; a circulation cleaning passage L3;
a drug return passage L4; a filter unit 1100;
a cleaning unit 1200; a filter 1110;
a waste water inlet 1111; a purified water outlet 1112;
a concentrate outlet 1113; a source of desulfurized wastewater 1121;
a source of purified water 1131; concentrate source 1141;
a reservoir 1210; a first medicine port 1211;
a second drug port 1212; replacing 1220 with a new source of medicament;
a first pressure sensor 1311; a second pressure sensor 1312;
a third pressure sensor 1313; a fourth pressure sensor 1314;
a fifth pressure sensor 1315; a first flow meter 1321;
a second flow meter 1322; a liquid level sensor 1331;
a first pneumatic valve 1411; a second pneumatic valve 1412;
a third pneumatic valve 1413; a fourth pneumatic valve 1414;
a fifth pneumatic valve 1415; a sixth pneumatic valve 1416;
a first proportional regulating valve 1421; a second proportional regulating valve 1422;
a first manual valve 1431; a second manual valve 1432;
third Manual valve 1433 fourth Manual valve 1434
Fifth Manual valve 1435 sixth Manual valve 1436
Seventh manual valve 1437 first pump 1441;
a second pump 1442; automatic exhaust valve 1451
Compressed air source 1461
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.
The present embodiment provides a desulfurization wastewater treatment regeneration system 1000, which is further described below with reference to the attached drawings.
Fig. 1 is a system block diagram of the present invention, and as shown in fig. 1, the desulfurization waste water treatment regeneration system 1000 includes a filtering unit 1100 and a cleaning unit 1200. The filter unit 1100 is fluidly connected to the cleaning unit 1200, so that the cleaning unit 1200 provides the filter unit 1100 with an agent to clean the filter unit 1100, thereby extending the life of the desulfurization wastewater treatment regeneration system 1000. In the desulfurization wastewater treatment regeneration system 1000 of the present application, the pneumatic valve and the manual valve are arranged to control the opening and closing of each pipeline, the pump is arranged to pressurize the liquid in the pipeline to provide power, and the proportional control valve is arranged to control the flow rate of the liquid in the pipeline.
The structure of the filter unit 1100 is described in detail below in conjunction with fig. 1.
As shown in fig. 1, the filtering unit 1100 includes a filter 1110, and the filter 1110 is provided with a waste water inlet 1111, a purified water outlet 1112, and a concentrated solution outlet 1113. As an example, the filter 1110 may be a tubular ceramic membrane filter provided with a tubular ceramic membrane. After the desulfurization waste water passes through the filter 1110, the purified water is discharged through the purified water outlet 1112, and the concentrated solution is discharged through the concentrated solution outlet 113. As shown in FIG. 1, the waste water inlet 1111 is disposed at an upper end of the strainer 1110, the purified water outlet 1112 is disposed at a middle position of the strainer 1110, and the concentrated solution outlet 1113 is disposed at a lower end of the strainer 1110
The desulfurization wastewater treatment regeneration system 100 of the present application includes a plurality of sensors, and as shown in fig. 1, the desulfurization wastewater treatment regeneration system 100 includes a first pressure sensor 1311, a second pressure sensor 1312, a third pressure sensor 1313, a fourth pressure sensor 1314, a fifth pressure sensor 1315, a first flow meter 1321, and a second flow meter 1322. The second pressure sensor 1312 is arranged at the wastewater inlet 1111 and used for measuring the hydraulic pressure at the wastewater inlet 1111, the third pressure sensor 1313 is arranged at the purified water outlet 1112 and used for measuring the hydraulic pressure at the purified water outlet 1112, and the fourth pressure sensor 1314 is arranged at the concentrated solution outlet 1113 and used for measuring the hydraulic pressure at the concentrated solution outlet 1113.
As shown in fig. 1, a desulfurization waste water source 1121 is fluidly connected to the filter 1110 through a pipe to form a desulfurization waste water input passage, and desulfurization waste water is input to the filter 1110. As shown in fig. 1, a first pneumatic valve 1411, a first manual valve 1431, a first pump 1441, the first pressure sensor 1311, and a sixth pneumatic valve 1416 are sequentially disposed on the desulfurization waste water input passage.
The purified water outlet 1112 is connected to the seventh manual valve 1437, the first flowmeter 1321 and the first proportional control valve 1421 in sequence through a pipeline to form a purified water discharge channel for discharging purified water after the desulfurization wastewater is filtered.
The concentrated solution outlet 1113 is connected to the first pump 1441, the first pressure sensor 1311, the sixth manual valve 1436, the second flowmeter 1322 and the second proportional control valve 1422 in sequence through pipelines to form a concentrated solution discharge channel for discharging the concentrated solution after the desulfurization wastewater is filtered.
Hereinafter, the structure of the cleaning unit 1200 will be described in detail with reference to fig. 1 to 2D.
As shown in fig. 1, the cleaning unit 1200 comprises a reservoir 1210, and the reservoir 1210 is provided with a first drug port 1211 and a second drug port 1212. A level sensor 1331 is also provided within the reservoir 1210, the level sensor 1331 being configured to detect a level of the medicament within the reservoir 1210.
As shown in fig. 1, in the desulfurization wastewater treatment regeneration system 1000 according to the present application, different flow paths are formed between the filter unit 1100 and the cleaning unit 1200 through a plurality of pipes, valves and pumps, so as to complete cleaning of the filter unit 1100. Hereinafter, the flow channel formed in the desulfurization wastewater treatment regeneration system 1000 according to the present application will be described in detail with reference to fig. 2A to 2D.
For the sake of clarity, in fig. 2A to 2D, the flow path formed by controlling the opening and closing of the pipeline by the valve is shown by a solid line.
As shown by a solid line in fig. 2A, the concentrate outlet 1113 is connected to the first pump 1441, the first pressure sensor 1311, the sixth manual valve 1436, the second flow meter 1322, the second proportional regulating valve 1422, and the concentrate source 1141 in this order by a pipe to form a pipe drain passage L1.
As shown by a solid line in fig. 2B, the first medicine port 1211 is connected through a pipe to a fifth manual valve 1435, a fifth pneumatic valve 1415, the fifth pressure sensor 1315, a second pump 1442, a second pneumatic valve 1412, a third manual valve 1433, the first pump 1441, the first pressure sensor 1311, the sixth pneumatic valve 1416, and the waste water inlet 1111 in this order to form a medicine replenishment passage L2.
As shown by a solid line in fig. 2C, the concentrate outlet 1113 is connected to the first pump 1441, the first pressure sensor 1311, the sixth pneumatic valve 1416, and the waste water inlet 1111 through a pipe in order to form a circulation cleaning passage L3.
As shown by a solid line in fig. 2D, the concentrate outlet 1113 is connected to the third manual valve 1433, the third pneumatic valve 1413, the fifth pressure sensor 1315, the second pump 1442, the fourth pneumatic valve 1414, the fourth manual valve 1434, and the second medicine port 1212 through pipes in order to form a medicine return passage L4.
As shown in fig. 1, the cleaning unit 1200 further includes a source 1220 of a refreshing agent. The refill medicament source 1220 is sequentially connected to the second manual valve 1432, the second pump 1442, the fifth pressure sensor 1315, the fifth manual valve 1435 and the first medicament port 1211 through pipelines to form a medicament refill passage.
The second medicine port 1212 is connected to the fourth manual valve 1434, the fourth pneumatic valve 1414, the second pump 1442, the fifth pressure sensor 1315, the third pneumatic valve 1413, the second pneumatic valve 1412, and the second manual valve 1432 through a pipe in this order to form a medicine discharge passage.
As will be understood by those skilled in the art, the first pneumatic valve 1411, the second pneumatic valve 1412, the third pneumatic valve 1413, the fourth pneumatic valve 1414, the fifth pneumatic valve 1415, the sixth pneumatic valve 1416, the first proportional regulating valve 1421, and the second proportional regulating valve 1422 are opened and closed by compressed air. Therefore, as shown in fig. 3, the desulfurization wastewater treatment regeneration system 1000 further includes a compressed air source 1461, the compressed air source 1461 is respectively connected to the first pneumatic valve 1411, the second pneumatic valve 1412, the third pneumatic valve 1413, the fourth pneumatic valve 1414, the fifth pneumatic valve 1415 and the sixth pneumatic valve 1416, the compressed air source 1461 is further respectively connected to the first proportional control valve 1421 and the second proportional control valve 1422, and the on/off of each pneumatic valve and the opening degree adjustment of the proportional control valve are controlled by compressed air.
As shown in fig. 1, the desulfurization wastewater treatment regeneration system 1000 further includes an automatic exhaust valve 1451, and the automatic exhaust valve 1451 is disposed at the highest position of the desulfurization wastewater treatment regeneration system 1000. When there is air in the line, the gas will climb up the line and eventually collect at the highest point of the system, entering the valve cavity of the automatic exhaust valve 1451 and collecting at the upper portion of the automatic exhaust valve 1451. The pressure rises along with the increase of the gas in the valve, and when the gas pressure is greater than the system pressure, the exhaust port is opened and exhausts the gas; after the gas is exhausted, the exhaust port is closed. Similarly, when the system generates negative pressure, the exhaust port is opened, and the outside atmosphere enters the system through the exhaust port.
The control process and principle of the present system are described in detail below.
Step 1: filtration separation process
The desulfurization waste water enters the filter 1110 through the desulfurization waste water input channel, and cross-flow filtration is realized in the filter 1110. The desulfurization waste water enters the filter 1110 from the upper waste water inlet 1111 and flows from top to bottom. The desulfurized wastewater is driven by the first pump 1441 to flow downward at a high speed, preferably at a flow rate of 3-4m/s, to be filtered to form purified water and a concentrated solution. The purified water will pass through the purified water discharge channel to purified water source 1131 and the concentrate will pass through the concentrate discharge channel to concentrate source 1141. The discharge flow rates of the purified water and the concentrated solution can be controlled by the first proportional control valve 1421 and the second proportional control valve 1422, the flow rate of the purified water is usually set to 90% -99% of the sum of the flow rates of the purified water and the concentrated solution, and the first proportional control valve 1421 and the second proportional control valve 1422 can be adjusted according to the readings of the first flow meter and the second flow meter, so that the flow rate of the purified water and the flow rate of the concentrated solution reach a proper ratio.
As filtration time increases, there may be deposits within the filter 1110. The transmembrane pressure difference of the filtration can be calculated according to the hydraulic pressure PT2 of the wastewater inlet 1111 measured by the second pressure sensor 1312, the hydraulic pressure PT3 of the clean water outlet 1112 measured by the third pressure sensor 1313 and the hydraulic pressure PT4 of the concentrate outlet 1113 measured by the fourth pressure sensor 1314
When the transmembrane pressure difference is greater than the threshold value, the energy consumption of the system increases, the filtration performance decreases, and the filter 1110 needs to be cleaned and regenerated by a chemical agent.
Step 2: cleaning and regenerating process
As shown in fig. 2A, the first pneumatic valve 1411 is closed to stop the introduction of the desulfurization waste water into the system. The first proportional regulating valve 1421 is closed to prevent the desulfurization waste water from flowing into the purified water discharge passage. The second proportional control valve 1422 is opened, and the first pump 1441, the filter 1110 and the desulfurized wastewater in the pipeline are started to be discharged out of the system through the pipeline emptying channel L1. When the measured value of the fourth pressure sensor 1314 is less than or equal to a preset value, the first pump 1441 and the second proportional regulating valve 1422 are closed. And a desulfurization wastewater discharge system in the pipeline.
As further shown in fig. 2B, the second pneumatic valve 1412, the fifth pneumatic valve 1415, and the sixth pneumatic valve 1416 are opened, the second pump 1442 causes the medicament in the reservoir 1210 to pass into the filter 1110 through the medicament replenishment passage L2. When the measurement value of the first pressure sensor 1311 is equal to or greater than a set value, the second pump 1442 is turned off. Completing the supplement and addition process of the medicament.
As further shown in fig. 2C, the second and fifth pneumatic valves 1412, 1415 are closed and the first pump 1441 is activated. The agent circulates in the closed system formed by the circulation cleaning passage L3 and the filter 1110, and the filter 1110 is continuously cleaned to remove the deposits in the filter 1110. Thirty minutes after the cycle purge, the first pump 1441 is turned off, completing the regeneration of the filter 1110.
As further shown in fig. 2D, the third pneumatic valve 1413 and the fourth pneumatic valve 1414 are opened, the second pump 1442 is activated, the medicament in the filter 1110 is returned to the reservoir 1210 via the medicament return passage L4, and the second pump 1442 is closed while the third pneumatic valve 1413 and the fourth pneumatic valve 1414 are closed when the value measured by the fourth pressure sensor 1314 is less than or equal to a predetermined value. The cleaning regeneration process of the filter 1110 is ended.
As the number of times the medicament is used in the reservoir 1210 increases, the medicament absorbs more impurities and the cleaning effect becomes worse, and at this time, the medicament needs to be replaced with a new one.
And step 3: process for renewing pharmaceutical agents
The second, third and fourth pneumatic valves 1412, 1413, 1414 are opened to activate the second pump 1442 and the used medicament is expelled from the reservoir 1210 through the medicament discharge passage.
The fifth pneumatic valve 1415 is opened and the second pump 1442 is activated, the source 1220 of a refill medicament is introduced into the reservoir 1210 through the medicament refill passage, when the level of medicament measured by the level sensor 1331 reaches a preset value, the priming is stopped, and the second pump 1442 and the fifth pneumatic valve 1415 are closed. The drug replacement process is finished.
The present embodiment provides a desulfurization wastewater treatment regeneration system 1000 with a simple structure, which can treat desulfurization wastewater of different types, and the agent can clean the filter 1110 to realize regeneration, prolong the service life of the filter 1110, and ensure the stability of the desulfurization wastewater treatment effect.
The specific embodiment of the control method of the desulfurization wastewater treatment regeneration system in the present application has been embodied in the specific embodiment of the desulfurization wastewater treatment regeneration system 1000, and is not described herein again.
The present application has been described in relation to the above embodiments, which are only examples for implementing the present application. It must be noted that the disclosed embodiments do not limit the scope of the application. Rather, modifications and equivalent arrangements included within the spirit and scope of the claims are included within the scope of the present application.
Claims (12)
1. A desulfurization wastewater treatment regeneration system, comprising:
the filter unit comprises a filter, the filter is provided with a wastewater inlet, a purified water outlet and a concentrated solution outlet, the desulfurized wastewater enters the filter through the wastewater inlet and is filtered to obtain purified water and concentrated solution, the purified water is discharged through the purified water outlet, and the concentrated solution is discharged through the concentrated solution outlet; and the number of the first and second groups,
a washing unit including an agent for washing; wherein the content of the first and second substances,
the filter unit is in fluid connection with the cleaning unit;
measuring the hydraulic pressure of the wastewater inlet, the hydraulic pressure of the purified water outlet and the hydraulic pressure of the concentrated solution outlet, calculating transmembrane pressure difference according to the hydraulic pressure of the wastewater inlet, the hydraulic pressure of the purified water outlet and the hydraulic pressure of the concentrated solution outlet, and controlling the cleaning unit to provide the medicament for the filtering unit according to the transmembrane pressure difference so as to clean the filtering unit.
2. The desulfurization wastewater treatment regeneration system of claim 1, further comprising a pipe evacuation channel through which desulfurization wastewater within the desulfurization wastewater treatment regeneration system is discharged.
3. The desulfurization wastewater treatment regeneration system of claim 1, wherein said scrubbing unit includes a reservoir for storing said medicament, said medicament within said reservoir entering said filter through said wastewater inlet via a medicament replenishment path.
4. The desulfurization wastewater treatment regeneration system of claim 1, further comprising a circulation purge passage through which the chemical agent circulates to purge the filter.
5. The desulfurization wastewater treatment regeneration system of claim 3, further comprising an agent return channel, wherein the agent in the filter is discharged through the concentrate outlet and is returned to the reservoir through the agent return channel.
6. The desulfurization wastewater treatment regeneration system of claim 3, wherein the wash unit further comprises a source of a rejuvenating agent connected to the reservoir through a medicament rejuvenation passage to replenish the reservoir with a rejuvenating agent.
7. A control method of the desulfurization wastewater treatment regeneration system according to claim 1, characterized in that the control method comprises:
measuring the hydraulic pressure of the wastewater inlet, the hydraulic pressure of the purified water outlet and the hydraulic pressure of the concentrated solution outlet, and calculating transmembrane pressure difference according to the hydraulic pressure of the wastewater inlet, the hydraulic pressure of the purified water outlet and the hydraulic pressure of the concentrated solution outlet;
and controlling the desulfurization wastewater treatment regeneration system to perform a cleaning regeneration step according to the transmembrane pressure difference, wherein the cleaning unit provides the medicament for the filtering unit to clean the filtering unit in the cleaning regeneration step.
8. The method for controlling a desulfurization wastewater treatment regeneration system according to claim 7, wherein the cleaning regeneration step comprises a pipeline evacuation step of controlling opening and closing of a pipeline evacuation channel according to the transmembrane pressure difference so as to discharge desulfurization wastewater in the desulfurization wastewater treatment regeneration system through the pipeline evacuation channel.
9. The method of controlling a desulfurization wastewater treatment regeneration system according to claim 8, wherein a chemical replenishing step is performed after said piping evacuation step, and said cleaning unit comprises a reservoir, and said chemical in said reservoir enters said filter through said wastewater inlet via a chemical replenishing passage.
10. The method of controlling a desulfurization wastewater treatment regeneration system according to claim 9, wherein a circulation cleaning step is performed after said chemical replenishing step, and said chemical circulates and cleans said filter through said circulation cleaning passage.
11. The method of claim 10, wherein the cleaning and regenerating step includes a chemical agent returning step, wherein opening and closing of a chemical agent returning passage is controlled according to the transmembrane pressure difference, so that the chemical agent in the filter is discharged through the concentrate outlet and is returned to the reservoir through the chemical agent returning passage.
12. The method of claim 7, wherein the cleaning and regenerating step comprises a chemical renewing step, and the cleaning unit comprises a storage, and the opening and closing of the chemical renewing passage is controlled according to the impurity content of the chemical to replenish the storage with the renewing chemical.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011435891 | 2020-12-10 | ||
| CN2020114358915 | 2020-12-10 |
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| CN117263290A (en) * | 2023-11-15 | 2023-12-22 | 苏州碧清源环保技术有限公司 | Waste water filtering equipment and filtering method |
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