CN112239240B - Evaporator dosing system and dosing method - Google Patents
Evaporator dosing system and dosing method Download PDFInfo
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- CN112239240B CN112239240B CN202011426458.5A CN202011426458A CN112239240B CN 112239240 B CN112239240 B CN 112239240B CN 202011426458 A CN202011426458 A CN 202011426458A CN 112239240 B CN112239240 B CN 112239240B
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/042—Prevention of deposits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
- B01F25/51—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle in which the mixture is circulated through a set of tubes, e.g. with gradual introduction of a component into the circulating flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
- B01F25/52—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle with a rotary stirrer in the recirculation tube
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/2132—Concentration, pH, pOH, p(ION) or oxygen-demand
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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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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses an evaporator dosing system, which is used for at least one evaporator; the method comprises the following steps: dirt dispersion agent adds device includes: the scale inhibition and dispersion agent comprises a scale inhibition and dispersion agent barrel, a metering device and a scale inhibition and dispersion agent pipeline; the scale inhibition and dispersion agent barrel is used for storing a scale inhibition and dispersion agent; the metering device is arranged on the scale inhibition and dispersion agent barrel; the scale inhibition and dispersion agent barrel adds the scale inhibition and dispersion agent to the evaporator through a scale inhibition and dispersion agent pipeline; washing dispersant adds device includes: a cleaning dispersant barrel, a cleaning water barrel, a cleaning dispersant inlet pipeline, a cleaning water circulation pipeline, a pH meter and a cleaning water inlet pipeline; a cleaning dispersant tank adds a cleaning dispersant to the cleaning water circulation pipeline through a cleaning dispersant inlet pipeline; the cleaning water circulation pipeline is connected with the cleaning water bucket and used for circularly cleaning the cleaning water in the cleaning water bucket. The invention can delay the scaling of the evaporator, reduce the cleaning frequency and has good cleaning effect. The invention also provides a dosing method of the evaporator dosing system.
Description
Technical Field
The invention relates to the technical field of waste liquid treatment, in particular to an evaporator dosing system and a dosing method.
Background
The discharge of industrial waste liquid causes serious environmental pollution, in order to protect the environment, the sewage discharge needs to be strictly controlled, and each enterprise producing the industrial waste liquid needs to discharge the sewage after the sewage is treated by a special sewage treatment plant. Generally, the sewage is evaporated and concentrated by an evaporator, after the sewage is evaporated and concentrated by the evaporator, distilled water meeting the discharge standard can be extracted from the sewage, the distilled water can be directly discharged, and the rest concentrate is discharged to a sewage treatment plant for treatment. The sewage treatment cost of an enterprise can be greatly reduced, for example, 10 tons of sewage can be decomposed into 9 tons of distilled water and 1 ton of concentrate after evaporation concentration, and the enterprise only needs to spend the cost of 1 ton of treatment capacity, so that the sewage treatment cost is greatly reduced.
In order to ensure the normal operation of the evaporator, the evaporator is cleaned. Evaporator cleaning is generally divided into two categories: physical cleaning and chemical cleaning are generally adopted, but if physical cleaning cannot completely clean, chemical cleaning is used. Physical cleaning generally involves directly removing the scale from the evaporator with a high pressure water jet, and if the internal structure is hard scale, only chemical cleaning is possible because the physical method is to remove the scale.
Disclosure of Invention
The invention aims to solve the problem that the existing evaporator is poor in cleaning effect. The invention provides a chemical adding system for an evaporator, which can delay scaling of the evaporator, reduce cleaning times and has a good cleaning effect.
In order to solve the technical problem, the embodiment of the invention discloses an evaporator dosing system which is used for at least one evaporator; the method comprises the following steps: at least one evaporator; dirt dispersion agent adds device includes: the scale inhibition and dispersion agent comprises a scale inhibition and dispersion agent barrel, a metering device and a scale inhibition and dispersion agent pipeline; the scale inhibition and dispersion agent barrel is used for storing a scale inhibition and dispersion agent; the metering device is arranged on the scale inhibition and dispersion agent barrel; the scale inhibition and dispersion agent barrel is used for adding a scale inhibition and dispersion agent to the evaporator through the scale inhibition and dispersion agent pipeline; washing dispersant adds device includes: a cleaning dispersant barrel, a cleaning water barrel, a cleaning dispersant inlet pipeline, a cleaning water circulation pipeline, a pH meter and a cleaning water inlet pipeline; the cleaning dispersant barrel is used for storing a cleaning dispersant; the washing water bucket is used for storing washing water; the cleaning dispersant barrel adds a cleaning dispersant to the cleaning water circulation pipeline through the cleaning dispersant inlet pipeline; the cleaning water circulating pipeline is connected with the cleaning water bucket and used for circulating the cleaning water in the cleaning water bucket; the pH meter is arranged on the washing water circulating pipeline to detect the pH value of washing water in the washing water circulating pipeline; and the washing water barrel adds washing water with a set pH value to the evaporator through the washing water inlet pipeline.
By adopting the technical scheme, the scaling of the evaporator can be delayed, the cleaning frequency is reduced, and the cleaning effect is good.
According to another embodiment of the present invention, the cleaning water circulation pipeline is further provided with a circulation pump, a cleaning water circulation valve and a venturi device.
According to another embodiment of the invention, the venturi device is an ejector.
According to another specific embodiment of the invention, a pressure sensor and a liquid level meter are arranged on the cleaning dispersant barrel, a pressure sensor and a liquid level meter are arranged on the cleaning water barrel, a stirrer is arranged in the cleaning dispersant barrel, and a cleaning dispersant valve is arranged on the cleaning dispersant inlet pipeline.
According to another embodiment of the present invention, the method further comprises: the concentrated solution barrel and the discharge pipeline are provided with a sampling device, one end of the discharge pipeline is connected with a concentrated solution outlet of the evaporator, and the other end of the discharge pipeline is provided with a concentrated solution inlet pipeline and a cleaning water return pipeline; a concentrated solution inlet valve is arranged on the concentrated solution inlet pipeline, and the concentrated solution inlet pipeline is connected with the concentrated solution barrel; and a cleaning water return valve is arranged on the cleaning water return pipeline, and the cleaning water return pipeline is connected with the cleaning water bucket.
According to another embodiment of the present invention, the method further comprises: the washing device comprises a waste liquid buffer barrel, a waste liquid inlet pipeline and a washing water drainage pipeline, wherein a waste liquid inlet valve is arranged on the waste liquid inlet pipeline, a washing water drainage pump and a washing water drainage valve are arranged on the washing water drainage pipeline, waste liquid is added into the evaporator through the waste liquid inlet pipeline by the waste liquid buffer barrel, and washing water and waste liquid are discharged from the washing water barrel to the waste liquid buffer barrel through the washing water drainage pipeline.
According to another embodiment of the present invention, the method further comprises: a pressure reduction device for evacuating the evaporator.
The application also provides a dosing method adopting the evaporator dosing system, which comprises the following steps: adding a set weight of scale inhibiting and dispersing agent to the evaporator through the scale inhibiting and dispersing agent pipeline; adding a set amount of cleaning dispersant to the cleaning dispersant barrel and a set amount of cleaning water to the cleaning water barrel; the washing water in the washing water bucket circulates in the washing water circulation pipeline, and a washing dispersant is added into the washing water circulation pipeline to prepare the washing water with a set pH value; the pH meter detects the pH value of the washing water in the washing water circulating pipeline; finishing the process of preparing the cleaning water with the set pH value when the pH value of the cleaning water in the cleaning water circulating pipeline reaches the set pH value, stopping the circulation of the cleaning water in the cleaning water bucket in the cleaning water circulating pipeline, and enabling the cleaning water in the cleaning water bucket to have the set pH value; after the evaporator finishes the evaporation concentration treatment of the waste liquid, the cleaning water bucket adds the cleaning water with the set amount of the set pH value to the evaporator through the cleaning water inlet pipeline.
According to another embodiment of the present invention, the method further comprises: after the cleaning of the evaporator is finished, starting a sampling device on a discharge pipeline of the evaporator to perform sampling detection; sampling and judging that the content of the waste residues in the discharged liquid is higher than a set value, and discharging the discharged liquid into a concentrated liquid barrel; and sampling and judging that the content of the waste residue in the discharged liquid is lower than a set value, and discharging the discharged liquid into the cleaning water barrel.
According to another embodiment of the present invention, the method further comprises: when the weight of the cleaning dispersant in the cleaning dispersant barrel is detected to be lower than a set value, adding the cleaning dispersant into the cleaning dispersant barrel; and starting a stirrer in the washing dispersant barrel to stir in the process of adding the washing dispersant into the washing dispersant barrel or after the washing dispersant is added into the washing dispersant barrel.
According to another embodiment of the present invention, the method further comprises: after the evaporator is cleaned, when the difference between the pH value of cleaning water in the cleaning water bucket and a set pH value is detected to exceed a set range, the cleaning water bucket discharges cleaning water waste liquid to a waste liquid buffer bucket; the washing water bucket finishes the process of discharging washing water waste liquid to the waste liquid buffer bucket and repeating the process of preparing the washing water with the set pH value.
According to another embodiment of the invention, the evaporator is under negative pressure.
Drawings
FIG. 1 is a first schematic diagram of a chemical dosing system of an evaporator according to an embodiment of the present invention;
FIG. 2 shows a second schematic structural diagram of a chemical dosing system of an evaporator according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.
In the description of the present embodiment, it should be noted that the terms "upper", "inner", and the like refer to the orientation or positional relationship based on the drawings or the orientation or positional relationship that the invention is used to put on, are only used for convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the invention.
The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present embodiment, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the present application provides an evaporator dosing system 1 for at least one evaporator 10. The evaporator dosing system 1 comprises a scale inhibition and dispersion agent adding device 20 and a cleaning and dispersion agent adding device 30. Two evaporators 10 are shown in fig. 1, but the application is not limited thereto, and in some possible embodiments the number of evaporators 10 is for example one, three or another number. The evaporator 10 can evaporate and concentrate the waste liquid.
Referring to fig. 1, the scale inhibiting and dispersing agent adding apparatus 20 includes: scale inhibition and dispersion agent barrel 21, metering device 22 and scale inhibition and dispersion agent pipeline 23. The scale inhibition and dispersion agent barrel 21 is used for storing a scale inhibition and dispersion agent; the metering device 22 is arranged in the dirt dispersion agent barrel 21 and is used for weighing the dirt dispersion agent stored in the dirt dispersion agent barrel 21; the scale inhibition and dispersion agent barrel 21 adds the scale inhibition and dispersion agent to the evaporator 10 through a scale inhibition and dispersion agent pipeline 23. After the evaporator 10 is operated, waste liquid is fed into the evaporator 10, and before or during the liquid inlet stage, a quantitative scale inhibition and dispersion agent is weighed by a metering device 22 according to the scale inhibition treatment requirement, so that the scale inhibition and dispersion agent is quantitatively added into the evaporator 10 through a scale inhibition and dispersion agent pipeline 23.
In this embodiment, the metering device 22 is a load cell, and the dirt dispersion agent barrel 21 is arranged on the load cell. The amount of the scale inhibition and dispersion agent can be accurately measured by using the weighing sensor, so that the scale inhibition and dispersion agent can be quantitatively used according to actual needs. The application is not limited to the above, and in some possible embodiments, the scale inhibiting and dispersing agent can be metered by other metering devices such as a metering pump.
In addition, two evaporators 10 are shown in fig. 1, and the scale inhibiting and dispersing agent pipeline 23 comprises a scale inhibiting and dispersing agent first branch pipeline 24 and a scale inhibiting and dispersing agent second branch pipeline 26. The first branch pipe 24 of the scale inhibiting and dispersing agent is connected with one of the evaporators 10 and is provided with a first valve 25 of the scale inhibiting and dispersing agent, and after the first valve 25 of the scale inhibiting and dispersing agent is opened, a set amount of the scale inhibiting and dispersing agent, such as 5kg, can be added to one of the evaporators 10 through the first branch pipe 24 of the scale inhibiting and dispersing agent. The second branch pipe 26 of the scale inhibiting and dispersing agent is connected with the other evaporator 10 and is provided with a second valve 27 of the scale inhibiting and dispersing agent, and after the second valve 27 of the scale inhibiting and dispersing agent is opened, a set amount of the scale inhibiting and dispersing agent, for example 5kg, can be added to the other evaporator 10 through the second branch pipe 26 of the scale inhibiting and dispersing agent. However, the present application is not limited thereto, and a set amount of scale inhibiting dispersant may be added to the corresponding evaporator 10 through the scale inhibiting dispersant pipe 23 regardless of the number of evaporators 10.
Referring to fig. 1 and 2, the wash dispersant adding apparatus 30 includes: a cleaning dispersant barrel 31, a cleaning water barrel 32, a cleaning dispersant inlet pipeline 33, a cleaning water circulating pipeline 34, a pH meter 341 and a cleaning water inlet pipeline 36. The cleaning dispersant tank 31 is used to store cleaning dispersant. The washing water tub 32 stores washing water, and tap water may be added to the washing water tub 32 through a tap water pipe 37. The washing dispersant tank 31 adds a washing dispersant to the washing water circulation line 34 through the washing dispersant inlet line 33 to perform a process of preparing washing water having a set pH value, and tap water and the washing dispersant are mixed to form washing water. A washing water circulation pipe 34 is connected to the washing water tub 32 for circulating the washing water in the washing water tub 32. A pH meter 341 is provided on the washing water circulation line 34 to detect the pH value of the washing water in the washing water circulation line 34.
That is, the washing water in the washing water tub 32 is mixed with the washing dispersant, and the mixed washing water is circulated through the washing water circulation pipe 34 and then flows into the washing water tub 32 again. The pH value in the washing water circulation line 34 is detected by the pH meter 341, and if the washing water reaches the set pH value and the process of preparing the washing water having the set pH value is completed, the washing water stops circulating in the washing water circulation line 34; if the pH value is not higher than the set pH value, the tap water or the cleaning dispersant with higher concentration is continuously added according to the requirement, and the circulation is continuously carried out. When the preparation of the washing water having the set pH is completed, the washing water tub 32 adds the washing water having the set pH to the evaporator 10 through the washing water inlet line 36 connected to the washing water inlet 12 of the evaporator 10.
Generally, since the volume of the wash water tub 32 is greater than the volume of the wash dispersant tub 31, for example, the wash water tub 32 stores 10 tons of wash water and the wash dispersant tub 31 stores 1 ton of wash dispersant. The cleaning dispersant is added into the cleaning water circulating pipeline 34 through the cleaning dispersant barrel 31 and is mixed with the cleaning water in the cleaning water barrel 32, so that the cleaning water with the set pH value can be conveniently prepared.
Therefore, after the scale inhibition and dispersion agent is added into the evaporator 10 through the scale inhibition and dispersion agent adding device 20, the scale formation in the evaporator 10 can be slowed down, the scale inhibition and dispersion agent can remove scales and prevent the formation of scale, the heat exchange efficiency is improved, and the consumption of electric energy or fuel is reduced.
After the evaporator 10 completes the evaporation concentration process, the evaporator 10 is cleaned by adding the prepared cleaning water with the set pH value into the evaporator 10 through the cleaning dispersant adding device 30, and the number of cleaning times can be one or more. The water scale, oil stain and other substances in the evaporator 10 are cleaned in time through the cleaning water, so that the service life of the evaporator 10 is prolonged.
In addition, the scale inhibiting and dispersing agent can slow down the scale formation in the evaporator 10, so that the pollution discharge can be reduced when the scale inhibiting and dispersing agent is matched with cleaning water, the cleaning effect is good, the cleaning water and the cleaning frequency are reduced, and the utilization rate of the cleaning water is improved.
In addition, the specific types of the scale inhibition and dispersion agent and the cleaning and dispersion agent are not limited, and the corresponding types of the scale inhibition and dispersion agent and the cleaning and dispersion agent are selected according to the scale inhibition treatment requirement and the cleaning treatment requirement. In some possible embodiments, the scale inhibition and dispersion agent is ZF-903 evaporator scale inhibition and dispersion agent, the appearance is precipitate-free and layering-free uniform liquid, the pH value is 1-12, and the density is more than 1.1g/cm3The dosage of the medicament is 50mg/L to 200 mg/L. The cleaning dispersant is GL010 acid cleaning dispersant with pH value of 2, and 20-40kg of one ton of cleaning water is added.
With continued reference to fig. 1 and 2, the cleaning water circulation pipeline 34 of the present application is further provided with a circulation pump 343, a cleaning water circulation valve 344 and a venturi device 342, and the cleaning dispersant inlet pipeline 33 is provided with a cleaning dispersant valve 331. When the washing water having a predetermined pH is prepared, the circulation pump 343 and the washing water circulation valve 344 in the washing water circulation line 34 are opened, and the washing dispersant valve 331 in the washing dispersant inlet line 33 is opened. The cleaning water in the cleaning water tub 32 is pumped into the cleaning water circulation pipe 34 by the circulation pump 343, the cleaning water in the cleaning water circulation pipe 34 passes through the venturi device 342, the venturi device 342 generates a negative pressure, and the cleaning dispersant having a high concentration in the cleaning dispersant tub 31 can be sucked out of the cleaning dispersant tub 31 and fed into the cleaning water circulation pipe 34 through the cleaning dispersant inlet pipe 33. If the washing water reaches the set pH, the circulation pump 343 is turned off. If the pH value does not reach the set pH value, tap water or the cleaning dispersant with higher concentration is continuously added according to the requirement, and the circulating pump 343 continuously works to continuously circulate. Thus, the pH of the washing water in the washing water tub 32 is cyclically adjusted by providing the washing dispersant tub 31, the washing water tub 32, the circulation pump 343, and the venturi device 342. In the present application, venturi device 342 is an ejector. The present application is not limited thereto and a venturi device capable of generating negative pressure is suitable for the present application.
Referring to fig. 1 and 2, a first pressure sensor 313 and a first liquid level meter 312 (e.g., a visible liquid level meter) are provided on the cleaning dispersant tank 31, and a stirrer 311 is provided in the cleaning dispersant tank 31. After the cleaning dispersant in the cleaning dispersant barrel 31 is used up, the cleaning dispersant can be added into the cleaning dispersant barrel, the adding amount of the cleaning dispersant can be determined through the first pressure sensor 313, the liquid level height in the cleaning dispersant barrel 31 can be determined through the first liquid level meter 312, and quantitative addition and monitoring of the cleaning dispersant can be achieved. After the dosing is completed or during the dosing process, the mixer 311 is started to mix, so that the added cleaning dispersant (solid or liquid) in the cleaning dispersant tank 31 is uniformly mixed with water, and the cleaning dispersant is conveniently added to the cleaning water circulation pipeline 34, so as to prepare the cleaning water with a set pH value.
Referring to fig. 2, the washing water tank 32 is provided with a second pressure sensor 322 and a second liquid level gauge 321 (e.g., a visible liquid level gauge). After the washing water is consumed, tap water can be fed into the washing water tank 32 through an external water source (such as a tap water pipe 37), the adding amount of the tap water can be determined through the second pressure sensor 322, the liquid level height in the washing water tank 32 can be determined through the second liquid level meter 321, and the quantitative adding and monitoring of the tap water can be realized.
With continued reference to fig. 1 and 2, the evaporator medicating system 1 of the present application further comprises: the concentrated solution barrel 50 and the discharge pipeline 51, the discharge pipeline 51 is provided with a sampling device 52, one end of the discharge pipeline 51 is connected with the concentrated solution outlet 11 of the evaporator 10, and the other end is provided with a concentrated solution inlet pipeline 511 and a cleaning water return pipeline 513. The concentrated solution inlet pipe 511 is provided with a concentrated solution inlet valve 512, and the concentrated solution inlet pipe 511 is connected with the concentrated solution barrel 50. A cleaning water return valve 514 is provided on the cleaning water return pipe 513, and the cleaning water return pipe 513 is connected to the cleaning water tub 32.
After the evaporator 10 is cleaned by the cleaning water having a set pH value in the cleaning water tank 32, the evaporator 10 discharges the waste liquid from the discharge pipe 51, and the waste residue content in the discharge liquid can be determined by sampling from a sampling device 52 (e.g., a sampling valve) on the discharge pipe 51. If the waste residue content in the discharged liquid is higher, the waste liquid is discharged into the concentrated liquid barrel 50. If the waste residue content in the discharged liquid is small, the waste liquid is discharged into the washing water tank 32. The washing water discharged into the washing water tub 32 can be used for the next circulation washing. That is, after the evaporator 10 is washed, the washing water may be discharged to the washing water tub 32 or the concentrate tub 50.
Referring to fig. 1, the evaporator medicating system 1 of the present application further comprises: a waste liquid buffer barrel 40, a waste liquid inlet pipeline 41 and a cleaning water drainage pipeline 38. Can set up waste liquid feed valve 42 on waste liquid inlet pipe 41, open waste liquid feed valve 42 back, waste liquid buffer bucket 40 adds the waste liquid to evaporimeter 10 through the waste liquid inlet pipe 41 of being connected with the waste liquid import 13 of evaporimeter 10 to make evaporimeter 10 carry out the evaporative concentration processing to the waste liquid.
The cleaning water drain line 38 is provided with a cleaning water drain pump 381 and a cleaning water drain valve 382, and the cleaning water tank 32 is opened to drain the cleaning water waste liquid to the waste liquid buffer tank 40 through the cleaning water drain line 38. The waste washing water is discharged into the waste buffer tank 40, the waste buffer tank 40 can be washed, and the washing water in the washing water tank 32 can be replaced.
In some possible embodiments, the evaporator dosing system 1 of the present application further comprises: and a pressure reducing device (not shown) for evacuating the evaporator 10. After the evaporator 10 is vacuumized, the evaporator is in a negative pressure state, and the scale inhibition dispersing agent and the cleaning dispersing agent can be added into the evaporator 10 under the action of the negative pressure. The specific type of the pressure reducing device is not limited, and it is sufficient if vacuum can be drawn so that the evaporator 10 is in a negative pressure state. For example, the pressure reducing device employs a pump (e.g., a vacuum pump) in conjunction with a valve assembly to evacuate the evaporator 10.
In addition, the application is not limited to the addition of the scale inhibition and dispersion agent and the cleaning and dispersion agent through the evaporator in a negative pressure state, and the scale inhibition and dispersion agent and the cleaning and dispersion agent can be added to the evaporator through other driving devices, such as a dosing pump.
It should be noted that, the type of the valve on each pipeline of the evaporator dosing system 1 of the present application is not limited, and the on-off of the corresponding pipeline can be realized. The valves are for example of the pneumatic, cut-off, one-way type.
Referring to fig. 1 and 2, the present application further provides a dosing method using the evaporator dosing system 1 of any of the above embodiments, comprising: after the evaporator 10 is operated, waste liquid is fed into the evaporator 10, and before or during the liquid inlet stage, a scale inhibiting dispersant with set weight is added into the evaporator 10 through a scale inhibiting dispersant pipeline 23, so that the scale inhibiting dispersant is quantitatively added into the evaporator 10 through the scale inhibiting dispersant pipeline 23.
And, add the washing dispersant of the set amount to the washing dispersant barrel 31, add the washing water of the set amount to the washing water barrel 32; the tap water in the washing water tub 32 circulates in the washing water circulation line 34, and the washing dispersant is added to the washing water circulation line 34 so that the tap water and the washing dispersant are mixed together to perform a process of preparing the washing water having a set pH value; in the process of preparing the washing water having the set pH, the pH of the washing water in the washing water circulation line 34 is detected by the pH meter 341.
Specifically, when the washing water having a predetermined pH is prepared, the washing water circulation valve 344 of the circulation pump 343 in the washing water circulation line 34 is opened, and the washing dispersant valve 331 in the washing dispersant inlet line 33 is opened. Tap water in the cleaning barrel is pumped into the cleaning water circulation pipeline 34 by the circulation pump 343, cleaning water in the cleaning water circulation pipeline 34 passes through the venturi device 342, the venturi device 342 generates negative pressure, and the cleaning dispersant with high concentration in the cleaning dispersant barrel 31 can be sucked out from the cleaning dispersant barrel 31 and is added into the cleaning water circulation pipeline 34 by the cleaning dispersant inlet pipeline 33. If the washing water reaches the set pH value, the process of preparing the washing water having the set pH value is completed, and the circulation pump 343 is turned off. If the pH value does not reach the set pH value, the washing water or the washing dispersant with higher concentration is continuously added according to the requirement, and the circulating pump 343 continuously works to continuously circulate.
The pH value of the washing water in the washing water circulation line 34 reaches the set pH value, indicating that the preparation of the washing water is completed, the washing water in the washing water tub 32 stops circulating in the washing water circulation line 34, and the washing water in the washing water tub 32 has the set pH value.
After the evaporator 10 performs the evaporation concentration process on the waste liquid, the washing water tub 32 adds a set amount of washing water having a set pH value to the evaporator 10 through the washing water inlet pipe 36 to wash the evaporator 10.
Therefore, after the scale inhibition and dispersion agent is added into the evaporator 10 through the scale inhibition and dispersion agent adding device 20, the scale formation in the evaporator 10 can be slowed down, the scale inhibition and dispersion agent can remove scales and prevent the formation of scale, the heat exchange efficiency is improved, and the consumption of electric energy or fuel is reduced. After the evaporator 10 finishes the evaporation concentration treatment, the prepared cleaning water with the set pH value is added into the evaporator 10 through the cleaning dispersant adding device 30 to clean the evaporator 10, and substances such as water scales and oil stains in the evaporator 10 are cleaned in time through the cleaning water, so that the service life of the evaporator 10 is prolonged. In addition, the scale inhibiting and dispersing agent can slow down the scale formation in the evaporator 10, so that the pollution discharge can be reduced when the scale inhibiting and dispersing agent is matched with cleaning water, the cleaning effect is good, the cleaning water and the cleaning frequency are reduced, and the utilization rate of the cleaning water is improved.
In some possible embodiments, the method of medicating further comprises: after the cleaning of the evaporator 10 is completed, starting a sampling device 52 on a discharge pipeline 51 of the evaporator 10 for sampling detection; sampling and judging that the content of the waste residues in the discharged liquid is higher than a set value, and discharging the discharged liquid into a concentrated liquid barrel 50; sampling and judging that the content of the waste residue in the discharged liquid is lower than a set value, and discharging the discharged liquid into a cleaning water tank 32. The washing water discharged into the washing water tub 32 can be used for the next circulation washing. That is, after the evaporator 10 is washed, the washing water may be discharged to the washing water tub 32 or the concentrate tub 50.
In some possible embodiments, the method of medicating further comprises: when the weight of the cleaning dispersant in the cleaning dispersant barrel 31 is detected to be lower than a set value, namely when the cleaning dispersant is insufficient, adding the cleaning dispersant into the cleaning dispersant barrel 31; during the process of adding the cleaning dispersant into the cleaning dispersant tank 31 or after the completion of adding the cleaning dispersant into the cleaning dispersant tank 31, the agitator 311 in the cleaning dispersant tank 31 is started to agitate. The monitoring of the wash dispersant in the wash dispersant tank 31 facilitates the proper completion of the washing of the evaporator 10 by the wash water and the proper performance of the cyclical dispensing of the wash water at the set pH.
In some possible embodiments, the method of medicating further comprises: when the difference between the pH value of the washing water in the washing water tub 32 and the set pH value is detected to exceed the set range after the washing of the evaporator 10 is completed. For example, the washing water for washing the evaporator 10 has a pH value of 5, and it is detected that the washing water in the washing water tub 32 has a pH value of 7, which exceeds the set pH value. It is explained that the washing water in the washing water tub 32 needs to be replaced and the washing water having the set pH is newly prepared. At this time, the washing water tub 32 discharges the washing water waste liquid to the waste liquid buffer tub 40. The waste washing water is discharged into the waste buffer tank 40, the waste buffer tank 40 can be washed, and the washing water in the washing water tank 32 can be replaced.
The above process of preparing the washing water having the set pH is repeated when the washing water tub 32 finishes discharging the washing water waste liquid to the waste liquid buffer tub 40, for example, the second pressure sensor 322 provided on the washing water tub 32 shows the minimum value.
In addition, in some possible embodiments, during the dosing process of the evaporator 10, the evaporator 10 is in a negative pressure state, so as to realize the addition of the scale inhibiting dispersant and the cleaning dispersant to the evaporator 10 under the action of the negative pressure.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, taken in conjunction with the specific embodiments thereof, and that no limitation of the invention is intended thereby. Various changes in form and detail, including simple deductions or substitutions, may be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (11)
1. An evaporator dosing system for at least one evaporator; it is characterized by comprising:
dirt dispersion agent adds device includes: the scale inhibition and dispersion agent comprises a scale inhibition and dispersion agent barrel, a metering device and a scale inhibition and dispersion agent pipeline; the scale inhibition and dispersion agent barrel is used for storing a scale inhibition and dispersion agent; the metering device is arranged on the scale inhibition and dispersion agent barrel; the scale inhibition and dispersion agent barrel is used for adding a scale inhibition and dispersion agent to the evaporator through the scale inhibition and dispersion agent pipeline;
washing dispersant adds device includes: a cleaning dispersant barrel, a cleaning water barrel, a cleaning dispersant inlet pipeline, a cleaning water circulation pipeline, a pH meter and a cleaning water inlet pipeline; the cleaning dispersant barrel is used for storing a cleaning dispersant; the washing water bucket is used for storing washing water; the cleaning dispersant barrel adds a cleaning dispersant to the cleaning water circulation pipeline through the cleaning dispersant inlet pipeline; the cleaning water circulating pipeline is connected with the cleaning water bucket and used for circulating the cleaning water in the cleaning water bucket; the pH meter is arranged on the washing water circulating pipeline to detect the pH value of washing water in the washing water circulating pipeline; the washing water bucket adds washing water with a set pH value to the evaporator through the washing water inlet pipeline;
further comprising: the concentrated solution barrel and the discharge pipeline are provided with a sampling device, one end of the discharge pipeline is connected with a concentrated solution outlet of the evaporator, and the other end of the discharge pipeline is provided with a concentrated solution inlet pipeline and a cleaning water return pipeline; a concentrated solution inlet valve is arranged on the concentrated solution inlet pipeline, and the concentrated solution inlet pipeline is connected with the concentrated solution barrel; and a cleaning water return valve is arranged on the cleaning water return pipeline, and the cleaning water return pipeline is connected with the cleaning water bucket.
2. The evaporator dosing system of claim 1, further comprising a recirculation pump, a purge water recirculation valve, and a venturi device disposed on the purge water recirculation line.
3. The evaporator dosing system of claim 2, wherein the venturi device is an ejector.
4. The evaporator dosing system of claim 1, wherein a pressure sensor and a level gauge are arranged on the cleaning dispersant tank, a pressure sensor and a level gauge are arranged on the cleaning water tank, a stirrer is arranged in the cleaning dispersant tank, and a cleaning dispersant valve is arranged on the cleaning dispersant inlet pipeline.
5. The evaporator medicating system of claim 1, further comprising: the washing device comprises a waste liquid buffer barrel, a waste liquid inlet pipeline and a washing water drainage pipeline, wherein a waste liquid inlet valve is arranged on the waste liquid inlet pipeline, a washing water drainage pump and a washing water drainage valve are arranged on the washing water drainage pipeline, waste liquid is added into the evaporator through the waste liquid inlet pipeline by the waste liquid buffer barrel, and washing water and waste liquid are discharged from the washing water barrel to the waste liquid buffer barrel through the washing water drainage pipeline.
6. The evaporator medicating system of any one of claims 1-5, further comprising: a pressure reduction device for evacuating the evaporator.
7. A method of dosing using the evaporator dosing system of any of claims 1 to 6, comprising:
adding a set weight of scale inhibiting and dispersing agent to the evaporator through the scale inhibiting and dispersing agent pipeline;
adding a set amount of cleaning dispersant to the cleaning dispersant barrel and a set amount of cleaning water to the cleaning water barrel;
the washing water in the washing water bucket circulates in the washing water circulation pipeline, and a washing dispersant is added into the washing water circulation pipeline to prepare the washing water with a set pH value;
the pH meter detects the pH value of the washing water in the washing water circulating pipeline;
finishing the process of preparing the cleaning water with the set pH value when the pH value of the cleaning water in the cleaning water circulating pipeline reaches the set pH value, stopping the circulation of the cleaning water in the cleaning water bucket in the cleaning water circulating pipeline, and enabling the cleaning water in the cleaning water bucket to have the set pH value;
after the evaporator finishes the evaporation concentration treatment of the waste liquid, the cleaning water bucket adds the cleaning water with the set amount of the set pH value to the evaporator through the cleaning water inlet pipeline.
8. The dosing method of claim 7, further comprising:
after the cleaning of the evaporator is finished, starting a sampling device on a discharge pipeline of the evaporator to perform sampling detection;
sampling and judging that the content of the waste residues in the discharged liquid is higher than a set value, and discharging the discharged liquid into a concentrated liquid barrel;
and sampling and judging that the content of the waste residue in the discharged liquid is lower than a set value, and discharging the discharged liquid into the cleaning water barrel.
9. The dosing method of claim 7, further comprising: when the weight of the cleaning dispersant in the cleaning dispersant barrel is detected to be lower than a set value, adding the cleaning dispersant into the cleaning dispersant barrel; and starting a stirrer in the washing dispersant barrel to stir in the process of adding the washing dispersant into the washing dispersant barrel or after the washing dispersant is added into the washing dispersant barrel.
10. The dosing method of claim 7, further comprising:
after the evaporator is cleaned, when the difference between the pH value of cleaning water in the cleaning water bucket and a set pH value is detected to exceed a set range, the cleaning water bucket discharges cleaning water waste liquid to a waste liquid buffer bucket;
the washing water bucket finishes the process of discharging washing water waste liquid to the waste liquid buffer bucket and repeating the process of preparing the washing water with the set pH value.
11. The dosing method according to claim 7, wherein the vaporizer is under negative pressure.
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| JPH0515861A (en) * | 1991-07-16 | 1993-01-26 | Canon Inc | Waste water treating device for washing device |
| CN105293726A (en) * | 2015-11-17 | 2016-02-03 | 新疆环境工程技术有限责任公司 | Scale inhibition and dispersion agent of high-temperature gas washing water system and treatment method thereof |
| CN206897358U (en) * | 2017-02-22 | 2018-01-19 | 镇江市天亿化工研究设计院有限公司 | Dispersant raw materials cleaning device |
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