CN113648718A - Sampling device with automatic backwashing system - Google Patents
Sampling device with automatic backwashing system Download PDFInfo
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- CN113648718A CN113648718A CN202110790828.1A CN202110790828A CN113648718A CN 113648718 A CN113648718 A CN 113648718A CN 202110790828 A CN202110790828 A CN 202110790828A CN 113648718 A CN113648718 A CN 113648718A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/02—Combinations of filters of different kinds
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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- Hydrology & Water Resources (AREA)
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- General Health & Medical Sciences (AREA)
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Abstract
The invention relates to a sampling device provided with an automatic backwashing system, which comprises a primary filter, a secondary filter and a tertiary filter, wherein a sample water inlet manual door and a first electromagnetic valve are arranged on a channel between a sample water channel inlet and the primary filter; a second electromagnetic valve and a pressure gauge are arranged on a channel between the secondary filter and the tertiary filter, and the tertiary filter is connected to a sewage draining outlet through an electrode; the invention is suitable for sampling of a circulating water system of a thermal power plant and other systems with poor water quality and easy pollution and blockage, ensures the stable operation of an online instrument, avoids the condition of pollution and blockage of a pipeline of a sampling system, and reduces the maintenance workload of the online instrument.
Description
Technical Field
The invention belongs to the technical field of sampling of circulating water systems of thermal power plants, and particularly relates to a sampling device with an automatic backwashing system.
Background
The on-line instrument sampling system generally has the advantages that a water sample directly enters the instrument analysis system through a sampling pipeline, other devices such as a filter and the like are basically not used for ensuring the stability of the water sample, and particularly, the stability and the safety of the on-line instrument cannot be guaranteed for a system with poor water quality.
Disclosure of Invention
The invention aims to provide a sampling device with an automatic back-flushing system, which can ensure the stability of an online instrument and the stability of a sampling system, ensure that impurity sludge and the like remained in a pipeline after long-term operation are discharged through timed back-flushing, have a certain flushing effect on a filter arranged in the sampling system and reduce the maintenance workload of the instrument and the sampling system.
The invention provides a sampling device with an automatic backwashing system, which comprises: the first-stage filter, the second-stage filter and the third-stage filter are sequentially arranged on the sample water channel, and a sample water inlet manual door and a first electromagnetic valve are arranged on a channel between the sample water channel inlet and the first-stage filter; a second electromagnetic valve and a pressure gauge are arranged on a channel between the secondary filter and the tertiary filter, the tertiary filter is connected with the electrode through an electric signal, and an outlet of the tertiary filter is connected with a sewage draining outlet;
be equipped with backwash water primary filter on the backwash water inlet passage, at backwash water entry with be equipped with backwash water entry hand-operated gate and backwash water solenoid valve between the backwash water primary filter, the export of backwash water primary filter is connected to on the pipeline before the secondary filter through the check valve.
As a further improvement of the invention, a sewage discharge pipe is arranged at the bottom of the secondary filter, the sewage discharge pipe is communicated with a sewage discharge outlet, a tee joint between the first electromagnetic valve and the primary filter is connected to the sewage discharge outlet, and a sewage discharge electromagnetic valve is arranged in front of the sewage discharge outlet.
As a further improvement of the invention, the device also comprises a PLC controller which is used for controlling the timing automatic switch of the second electromagnetic valve, the first electromagnetic valve, the blowdown electromagnetic valve and the backwashing water electromagnetic valve.
As a further improvement of the invention, the sampling device further comprises an online meter, the online meter is connected with the electrode through an electric signal, and the online meter is used for displaying sampling data.
As a further improvement of the invention, the primary filter is a Y-type filter.
As a further improvement of the invention, the tertiary filter is a PP cotton filter.
As a further improvement of the invention, manual isolation doors are arranged at the sample water inlet and the backwashing water inlet and are used for communicating the sample water inlet and the backwashing water inlet.
As a further improvement of the present invention, the sampling device further comprises an automatic/manual flush switch for switching between manual and automatic flush modes.
As a further improvement of the invention, a manual valve is arranged at the outlet of the secondary filter, and the manual valve is used for manual sewage discharge.
By means of the scheme, the sampling device with the backwashing system can ensure the stability of sampling analysis of the online instrument and reduce the daily maintenance workload of workers.
The invention can realize the automatic back washing of the sampling pipeline and the filter on the sampling pipeline at regular time according to the water quality condition of the system, ensure the water quality of the water sample entering the online instrument through the filtration of the three-stage filter, and also ensure the cleanliness of the sampling pipeline through the regular back washing under the condition of long-time operation. In addition, if the sampling port is polluted and blocked when the system runs for a long time, the back washing of the sampling port can be realized through the opening and closing of the manual door, and the smoothness of sampling and the representativeness of a water sample are ensured.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic flow diagram of a sampling device equipped with an automatic back-flushing system according to the present invention.
Fig. 2 is a schematic perspective view of a sampling device cabinet with an automatic backwashing system according to the present invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The invention provides a sampling device with an automatic back-flushing system, which comprises: the first-stage filter 5, the second-stage filter 4 and the third-stage filter 2 are sequentially arranged on the sample water channel, and a sample water inlet manual door 7 and a first electromagnetic valve 6 are arranged on a channel between the sample water channel inlet and the first-stage filter 5; a second electromagnetic valve 3 and a pressure gauge 16 are arranged on a channel between the secondary filter 4 and the tertiary filter 2, the tertiary filter 2 is electrically connected with an electrode 14, and an outlet of the tertiary filter 2 is connected with a sewage discharge outlet;
be equipped with backwash water primary filter 12 on the backwash water inlet passage, at the backwash water entry with be equipped with backwash water entry hand door 10 and backwash water solenoid valve 11 between backwash water primary filter 12, the export of backwash water primary filter 12 is connected to on the second grade filter 4 front pipeline through check valve 13.
A sewage discharge pipe is arranged at the bottom of the secondary filter 4 and connected to a sewage discharge port, a tee joint is connected between the first electromagnetic valve 6 and the primary filter 5 to the sewage discharge port, and a sewage discharge electromagnetic valve 9 is arranged in front of the sewage discharge port;
as an alternative embodiment, a manual valve is provided at the outlet of the secondary filter, which is used for manual blowdown.
The device also comprises a PLC (programmable logic controller) 15, wherein the PLC 15 is used for controlling the timing automatic switch of the second electromagnetic valve 13, the first electromagnetic valve 6, the blowdown electromagnetic valve 9 and the backwashing water electromagnetic valve 11 and is used for realizing backwashing cleaning of the sampling pipeline and the primary filter 5 and the secondary filter 4 on the sampling pipeline.
Sample water entry and backwash water entrance are equipped with manual division door 8, manual division door 8 is used for the intercommunication sample water entry and backwash water entry, when the long-time operation of system, the sample connection takes place dirty when stifled, opens manual division door 8, closes sample water entry manual door 7 and backwash water entry manual door 10, carries out the back flush to the sample connection, guarantees unobstructed and the representativeness of sample.
Specifically, the method comprises the following steps: as shown in fig. 2, the cabinet body of the sampling device with the automatic back-flushing system has a three-dimensional structure schematic diagram, the sampling device adopted in the invention is a waterproof integrated stainless steel cabinet type device, an online instrument 1 is installed on the inner door of the front door of the device to protect the device, meanwhile, the outer door adopts a transparent visual door to facilitate observation of instrument data, and the back door also adopts an open door design to facilitate replacement of a filter element and other maintenance.
As shown in fig. 1, which is a flow chart of the device, the flow direction of the sampling pipe in the cabinet is designed as follows: sample water inlet → sample water inlet manual door 7 (cut off/open sample water) → first solenoid valve 6 → primary filter 5 → secondary filter 4 → second solenoid valve 3 → pressure gauge 16 → tertiary filter 2 → electrode 14 → adapter → drain, and the tertiary filtration all adopts transparent visual design, conveniently observes the maintenance.
In order to ensure the cleanness of the backwashing pipeline, a backwashing water primary filter 12 is arranged behind a backwashing water electromagnetic valve 11 of the backwashing pipeline, the primary filter is a Y-shaped filter, and the Y-shaped filter can be manually disassembled and cleaned or a filter element can be replaced after long-time operation.
The secondary filter 4 can realize automatic backwashing, when the backwashing is operated for a long time and the problem of dirt blockage cannot be solved, the manual flushing can be set through the automatic/manual flushing change-over switch 17, when the manual backwashing is needed, the left-side change-over switch (automatic/manual) is firstly switched to a manual mode, and then the right-side change-over switch (stopping/manual) is switched to manual mode, so that the manual backwashing can be started. If the operation needs to be switched to the automatic backwashing again, the operation sequence is reversed. 4 backwashing water of secondary filter can use near clean water of equipment, filters water impurity through backwashing water primary filter 12 to through the regular backwash time of PLC controller 15 control, still be equipped with check valve 13 on the passageway simultaneously, prevent that rivers refluence phenomenon appears in the in-process that washes, the influence washes the effect. In daily operation, the manual sample water inlet door 7 and the manual backwashing water inlet door 10 are closed, and the filter element of the secondary filter 4 can be cleaned or replaced.
When the PLC 15 sets the time for reaching the backwashing, the blowdown electromagnetic valve 9 and the backwashing water electromagnetic valve 11 are opened, the second electromagnetic valve 3 and the first electromagnetic valve 6 are closed, the flushing is started according to the set time of the PLC 15, the blowdown electromagnetic valve 9 and the backwashing water electromagnetic valve 11 are closed after the flushing is finished, and the second electromagnetic valve 3 and the first electromagnetic valve 6 are opened for normal sampling analysis. Generally, the washing is preset to be carried out once every day and for half an hour once, and the washing times and the washing time are adjusted according to the actual condition of water quality.
The tertiary filter 2 is a PP cotton filter, and the filtering effect of the tertiary filter 2 is ensured again mainly by cleaning or replacing the filter element.
On-line instrument 1 need guarantee the cleanliness factor and the stable velocity of flow of water sample, through setting up tertiary filter, guarantees the quality of water sample through the tertiary filtration of water sample, avoids the damage of instrument, guarantees on-line instrument 1's stability.
The invention can realize the automatic back flushing of the sampling pipeline and the filter on the sampling pipeline at regular time according to the water quality condition of the system, and the water quality of a water sample entering the online instrument is ensured by the filtration of the three-stage filter; under the condition of long-time running, the cleanliness of the sampling pipeline is also ensured through the timed back washing. In addition, if the sampling port is polluted and blocked when the system runs for a long time, the back washing of the sampling port can be realized through the opening and closing of the manual door, and the smoothness of sampling and the representativeness of a water sample are ensured.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides a sampling device who is equipped with automatic back flush system which characterized in that: the sampling device comprises: the first-stage filter, the second-stage filter and the third-stage filter are sequentially arranged on the sample water channel, and a sample water inlet manual door and a first electromagnetic valve are sequentially arranged on a channel between the sample water channel inlet and the first-stage filter; a second electromagnetic valve and a pressure gauge are sequentially arranged on a channel between the secondary filter and the tertiary filter, the tertiary filter is connected with the electrode through an electric signal, and an outlet of the tertiary filter is connected with a sewage draining outlet;
be equipped with backwash water primary filter on the backwash water inlet passage, at backwash water entry with be equipped with backwash water entry hand-operated gate and backwash water solenoid valve between the backwash water primary filter in proper order, the export of backwash water primary filter is connected to on the pipeline before the secondary filter through the check valve.
2. The sampling device with the automatic backwashing system as claimed in claim 1, wherein a sewage discharge pipe is arranged at the bottom of the secondary filter, the sewage discharge pipe is communicated with a sewage discharge outlet, a tee joint between the first electromagnetic valve and the primary filter is connected to the sewage discharge outlet, and a sewage discharge electromagnetic valve is arranged in front of the sewage discharge outlet.
3. The sampling device with the automatic back washing system as claimed in claim 2, further comprising a PLC controller for controlling the timing automatic switch of the second solenoid valve, the first solenoid valve, the blowdown solenoid valve and the back washing water solenoid valve.
4. The sampling device with the automatic back washing system as claimed in claim 3, wherein a manual isolation door is provided at the sample water inlet and the back washing water inlet, and the manual isolation door is used for communicating the sample water inlet and the back washing water inlet.
5. A sampling device equipped with an automatic back-flushing system according to claim 4, characterized in that: the first-stage filter is a Y-shaped filter.
6. A sampling device equipped with an automatic back-flushing system according to claim 5, characterized in that: the third-stage filter is a PP cotton filter.
7. A sampling device equipped with an automatic back-flushing system according to any one of claims 1 to 6, characterized in that: the sampling device further comprises an online instrument, the online instrument is connected with the electrode through an electric signal, and the online instrument is used for displaying sampling data.
8. A sampling device equipped with an automatic back-flushing system according to any one of claims 1 to 6, characterized in that: the sampling device further comprises an automatic/manual flushing changeover switch for switching between manual and automatic flushing modes.
9. A sampling device incorporating an automatic back flush system as claimed in any one of claims 2 to 6, wherein: and a manual valve is arranged at the outlet of the secondary filter and used for manual sewage discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110790828.1A CN113648718A (en) | 2021-07-13 | 2021-07-13 | Sampling device with automatic backwashing system |
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| CN202110790828.1A CN113648718A (en) | 2021-07-13 | 2021-07-13 | Sampling device with automatic backwashing system |
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| CN113648718A true CN113648718A (en) | 2021-11-16 |
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| CN202110790828.1A Pending CN113648718A (en) | 2021-07-13 | 2021-07-13 | Sampling device with automatic backwashing system |
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