CN110954365A - Automatic backwashing system of steam sampling filter of thermal power plant - Google Patents
Automatic backwashing system of steam sampling filter of thermal power plant Download PDFInfo
- Publication number
- CN110954365A CN110954365A CN201911307487.7A CN201911307487A CN110954365A CN 110954365 A CN110954365 A CN 110954365A CN 201911307487 A CN201911307487 A CN 201911307487A CN 110954365 A CN110954365 A CN 110954365A
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- backwashing
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- water vapor
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- 238000011001 backwashing Methods 0.000 title claims abstract description 76
- 238000005070 sampling Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 98
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
-
- 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
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- 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
-
- 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
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
-
- 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
- G01N2001/1031—Sampling from special places
-
- 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
- G01N1/20—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials
- G01N1/2035—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials by deviating part of a fluid stream, e.g. by drawing-off or tapping
- G01N2001/2064—Devices for withdrawing samples in the liquid or fluent state for flowing or falling materials by deviating part of a fluid stream, e.g. by drawing-off or tapping using a by-pass loop
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to an automatic backwashing system of a water vapor sampling filter of a thermal power plant, which comprises a filter, a measuring flow cell and a backwashing water storage tank, wherein the filter is arranged in the measuring flow cell; the water inlet of the filter is communicated with a water vapor inlet pipe, the water vapor inlet pipe is connected with a first electric control valve in series, the water vapor inlet pipe is communicated with a backwashing water drain pipe, the backwashing water drain pipe is connected with a second electric control valve in series, the water outlet of the filter is communicated with a water vapor outlet pipe, the water vapor outlet pipe is connected with a third electric control valve in series, the water vapor outlet pipe is communicated with a measuring flow cell, the measuring flow cell is communicated with a backwashing water storage tank through a communicating pipe, the backwashing water storage tank is communicated with a backwashing pipe, the backwashing pipe is connected to the water vapor outlet pipe in return, a backwashing water pump is connected to the backwashing pipe in series, and a fourth electric control valve is connected to the backwashing pipe in series.
Description
Technical Field
The invention relates to the technical field of a water vapor sampling system of a thermal power plant, in particular to an automatic backwashing system of a water vapor sampling filter of the thermal power plant.
Background
In a thermodynamic system of a thermal power plant, main working media are water and steam, the quality of the water and the steam directly influences the performance of a heat engine, the water and the steam need to be subjected to temperature reduction and pressure reduction, continuous sampling and instrument analysis monitoring are carried out on line, the quality of the water and the steam is ensured, the influence of adverse factors such as corrosion and scaling of thermodynamic equipment such as boilers, steam drums and steam engines is prevented, safe and stable operation is ensured, along with the continuous operation of high-parameter and high-capacity coal-fired generating sets in recent years, the monitoring of steam indexes is more and more important, at present, the quality of the steam is generally monitored by an on-line instrument continuously, in order to ensure the accuracy of on-line instrument measurement, particle impurities in sample water need to be removed by a filter before the sample water enters a measurement flow cell, after a filter element of the filter is used for a period of time, the amount of the intercepted impurities reaches the upper limit, whether can't in time judge the filter core and reach the change requirement, the filter core that seriously pollutes does not have the filtration basically, impurity in the water sample sees through the filter, directly get into measuring electrode flow cell, not only influence electrode life, increase running cost, still the measurement accuracy of the online instrument of greatly reduced, can't in time accurately reflect the true quality of steam, greatly increased thermodynamic system corruption, scale deposit, the risk of long-pending salt, consequently, the above-mentioned problem is the technological difficult problem that technical staff in the field await measuring urgently.
Disclosure of Invention
Aiming at the problems that the filter element of a filter in the water vapor sampling system of the current power plant is seriously polluted, the accuracy of an on-line chemical instrument is influenced, and the service life of a measuring electrode is shortened, the invention aims to provide an automatic backwashing system of a water vapor sampling filter, which can effectively solve the problems.
In order to solve the above problems, the present invention proposes the following technical solutions: the utility model provides an automatic backwash system of steam sampling filter of thermal power plant, this system include the filter, measure flow-through cell and backwash water storage box, characterized by:
the water inlet of the filter is communicated with a water vapor inlet pipe, the water vapor inlet pipe is communicated with a backwashing water drain pipe, the water outlet of the filter is communicated with a water vapor outlet pipe, the water vapor outlet pipe is communicated with a measuring flow cell, the measuring flow cell is communicated with a backwashing water storage tank through a communicating pipe, the backwashing water storage tank is communicated with a backwashing pipe, the backwashing pipe is connected to the water vapor outlet pipe in a return mode, and a backwashing water pump is connected to the backwashing pipe in series.
Preferably, the steam inlet pipe is connected in series with a first electric control valve.
Preferably, the connection point between the backwashing water discharge pipe and the water vapor inlet pipe is positioned between the first electric control valve and the filter.
Preferably, a second electric control valve is connected in series with the backwashing water discharge pipe.
Preferably, a third electric control valve is connected in series on the vapor outlet pipe.
Preferably, the connection point between the backwash pipe and the moisture outlet pipe is located between the third electrically controlled valve and the filter.
Preferably, a fourth electric control valve is connected in series on the back flushing pipe.
The invention has the beneficial technical effects that:
the invention relates to an automatic backwashing system of a water vapor sampling filter of a thermal power plant, which consists of a sampling part and a backwashing part, wherein when the sampling system normally operates, water vapor enters a measuring flow cell after being filtered by a filter to complete online analysis and test, the drainage of the measuring flow cell is collected into a backwashing water storage tank, the water collected in the backwashing water storage tank can be used as backwashing water of the filter, the local material is obtained, new construction cost is not increased, the backwashing drainage is directly discharged to a trench between water vapor sampling, when the operation period of the sampling system reaches a set value, the system can automatically perform backwashing, the backwashing time is short, the influence on an online instrument is hardly generated, the accuracy of the online chemical instrument is not influenced, a filter element of the filter can be cleaned in time, the performance of the filter is ensured, the drainage of the collecting flow cell is used as a backwashing water source, demineralized water is used as a standby water source, backwashing, a plurality of filters can be backwashed once, the drainage of the flow cell can be measured simultaneously to meet the backwashing requirement, and wastewater is utilized in a gradient manner to meet the water-saving requirement.
Drawings
FIG. 1 is a connection diagram of an automatic backwashing system of a steam sampling filter in a thermal power plant;
in the figure: 11. the device comprises a first electronic control valve, a steam inlet pipe, a second electronic control valve, a backwash water outlet pipe, a filter, a steam outlet pipe, a backwash pipe, a measuring flow cell, a backwash water pump, a backwash water storage tank and a communication pipe, wherein the first electronic control valve is 12, the steam inlet pipe is 13, the second electronic control valve is 14, the backwash water outlet pipe is 15, the filter is 16, the steam outlet pipe is.
Detailed Description
In a first embodiment, referring to fig. 1, an automatic backwashing system of a steam sampling filter in a thermal power plant comprises the filter, a measuring flow cell and a backwashing water storage tank;
a water inlet of the filter is communicated with a water vapor inlet pipe, the water vapor inlet pipe is connected with a first electric control valve in series, a backwashing water discharge pipe is communicated with the water vapor inlet pipe, a second electric control valve is connected in series with the backwashing water discharge pipe, the connecting point between the backwashing water discharge pipe and the water vapor inlet pipe is positioned between the first electric control valve and the filter, a water outlet of the filter is communicated with a water vapor outlet pipe, the water vapor outlet pipe is connected with a third electric control valve in series, the water vapor outlet pipe is communicated with a measuring flow cell, the measuring flow cell is communicated with a backwashing water storage tank through a communicating pipe, a backwashing pipe is communicated with the backwashing water storage tank, the backwashing pipe is connected to the water vapor outlet pipe in a return mode, a backwashing water pump is connected to the backwashing pipe in series, a connection point between the backwashing pipe and the water vapor outlet pipe is located between the third electric control valve and the filter, and the backwashing pipe is connected to the fourth electric control valve in series.
The working process and principle of the invention are as follows:
referring to fig. 1, the invention discloses an automatic backwashing system of a steam sampling filter of a thermal power plant, which comprises two parts: an operation part and a backwashing part; when the sampling system normally operates, the first electric control valve and the third electric control valve are opened, the fourth electric control valve and the second electric control valve are closed, water vapor is filtered by the filter and then enters the measuring flow cell, online analysis and test are completed, the drainage of the measuring flow cell is collected into the backwashing water storage tank, when the sampling system operates for a certain period or the filter is obviously polluted and blocked, backwashing operation of the filter is carried out to remove impurities on the surface of the filter element and restore the filtering capacity of the filter element, a backwashing water pump is started during backwashing, the fourth electric control valve and the second electric control valve are opened, the first electric control valve and the third electric control valve are closed, dirty backwashing water is prevented from entering the flow cell, the backwashing water can reversely enter the filter under the pressure of the backwashing water pump at the moment, the filter element of the filter is reversely flushed, and the backwashing loose impurities can be discharged to a trench along with backwashing drainage.
The above embodiments are illustrative only, and should not be construed as limiting the scope of the invention, and many insubstantial modifications and variations of the invention can be made by an engineer in the field based on the above disclosure.
Claims (7)
1. The utility model provides an automatic backwash system of steam sampling filter of thermal power plant, this system include the filter, measure flow-through cell and backwash water storage box, characterized by:
the water inlet of the filter is communicated with a water vapor inlet pipe, the water vapor inlet pipe is communicated with a backwashing water drain pipe, the water outlet of the filter is communicated with a water vapor outlet pipe, the water vapor outlet pipe is communicated with a measuring flow cell, the measuring flow cell is communicated with a backwashing water storage tank through a communicating pipe, the backwashing water storage tank is communicated with a backwashing pipe, the backwashing pipe is connected to the water vapor outlet pipe in a return mode, and a backwashing water pump is connected to the backwashing pipe in series.
2. The automatic backwashing system of the steam sampling filter of the thermal power plant as claimed in claim 1, wherein: the water vapor inlet pipe is connected with a first electric control valve in series.
3. The automatic backwashing system of the steam sampling filter of the thermal power plant as claimed in claim 2, wherein: and the connection point between the backwashing water discharge pipe and the water vapor inlet pipe is positioned between the first electric control valve and the filter.
4. The automatic backwashing system of the steam sampling filter of the thermal power plant as claimed in claim 3, wherein: and a second electric control valve is connected in series on the backwashing water discharge pipe.
5. The automatic backwashing system of the steam sampling filter of the thermal power plant as claimed in claim 1, wherein: and a third electric control valve is connected in series on the water vapor outlet pipe.
6. The automatic backwashing system of the steam sampling filter of the thermal power plant as claimed in claim 5, wherein: and the connecting point between the backwashing pipe and the water vapor outlet pipe is positioned between the third electric control valve and the filter.
7. The automatic backwashing system of the steam sampling filter of the thermal power plant as claimed in claim 6, wherein: and a fourth electric control valve is connected in series on the back flushing pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911307487.7A CN110954365A (en) | 2019-12-18 | 2019-12-18 | Automatic backwashing system of steam sampling filter of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911307487.7A CN110954365A (en) | 2019-12-18 | 2019-12-18 | Automatic backwashing system of steam sampling filter of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110954365A true CN110954365A (en) | 2020-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911307487.7A Pending CN110954365A (en) | 2019-12-18 | 2019-12-18 | Automatic backwashing system of steam sampling filter of thermal power plant |
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| CN (1) | CN110954365A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562351A (en) * | 2020-05-28 | 2020-08-21 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Automatic monitoring device and method for water quality pollution index of reverse osmosis equipment inlet water |
| CN113648718A (en) * | 2021-07-13 | 2021-11-16 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Sampling device with automatic backwashing system |
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| CN206645908U (en) * | 2017-03-18 | 2017-11-17 | 内蒙古京能康巴什热电有限公司 | Thermal power plant's sewage disposal utilizes system |
| CN207502513U (en) * | 2017-09-22 | 2018-06-15 | 揭阳市表面处理生态工业园有限公司 | A kind of monitoring water quality on line pretreatment system |
| CN109883764A (en) * | 2017-12-06 | 2019-06-14 | 沈阳华清节能环保科技有限公司 | A kind of sewage treatment plant's on-line monitoring water quality sampling system |
| CN211235083U (en) * | 2019-12-18 | 2020-08-11 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Automatic backwashing system of steam sampling filter of thermal power plant |
-
2019
- 2019-12-18 CN CN201911307487.7A patent/CN110954365A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206645908U (en) * | 2017-03-18 | 2017-11-17 | 内蒙古京能康巴什热电有限公司 | Thermal power plant's sewage disposal utilizes system |
| CN207502513U (en) * | 2017-09-22 | 2018-06-15 | 揭阳市表面处理生态工业园有限公司 | A kind of monitoring water quality on line pretreatment system |
| CN109883764A (en) * | 2017-12-06 | 2019-06-14 | 沈阳华清节能环保科技有限公司 | A kind of sewage treatment plant's on-line monitoring water quality sampling system |
| CN211235083U (en) * | 2019-12-18 | 2020-08-11 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Automatic backwashing system of steam sampling filter of thermal power plant |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562351A (en) * | 2020-05-28 | 2020-08-21 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Automatic monitoring device and method for water quality pollution index of reverse osmosis equipment inlet water |
| CN111562351B (en) * | 2020-05-28 | 2022-11-22 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Automatic monitoring device and method for water quality pollution index of reverse osmosis equipment inlet water |
| CN113648718A (en) * | 2021-07-13 | 2021-11-16 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Sampling device with automatic backwashing system |
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