CN113552178A - Automatic continuous measurement method for hydrogen conductivity in steam-water sampling - Google Patents
Automatic continuous measurement method for hydrogen conductivity in steam-water sampling Download PDFInfo
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- CN113552178A CN113552178A CN202110582806.6A CN202110582806A CN113552178A CN 113552178 A CN113552178 A CN 113552178A CN 202110582806 A CN202110582806 A CN 202110582806A CN 113552178 A CN113552178 A CN 113552178A
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Abstract
The invention relates to an automatic continuous measurement method for hydrogen conductivity in steam-water sampling, belonging to the technical field of power generation. In the invention, a first valve is connected with an inlet of a first cation exchange resin column, and a second valve is connected with an inlet of a second cation exchange resin column; the outlet of the first cation exchange resin column is connected with the third valve, and the outlet of the second cation exchange resin column is connected with the inlet of the fourth valve; the outlet of the first flowmeter is connected with the inlet of the first conductivity tester, and the outlet of the second flowmeter is connected with the inlet of the second conductivity tester; the outlet of the first conductivity tester and the outlet of the second conductivity tester are both connected with the water outlet; the invention can realize the synchronous monitoring of hydrogen conductivity and conductivity, automatically judge the effectiveness of the hydrogen conductivity, realize the automatic continuous measurement of the hydrogen conductivity, avoid the interruption of the monitoring of the hydrogen conductivity and the abnormity of monitoring data, realize the prompt of the failure of the cation exchange resin column and facilitate the timely operation and maintenance replacement.
Description
Technical Field
The invention relates to a method, in particular to an automatic continuous measurement method for hydrogen conductivity in steam-water sampling, belonging to the technical field of power generation.
Background
With the development of boiler technology, boilers with large capacity and high parameters are more and more, and the requirements on steam and water quality are higher and higher. The steam-water sampling frame is an important tool for steam-water supervision and analysis of the thermal power plant, and performs real-time and on-line analysis on various kinds of steam, boiler water and the like of the thermal power plant. The hydrogen conductivity meter is an online chemical meter with the largest quantity on the steam-water sampling frame, and plays an important role in steam-water supervision of a thermal power plant.
At present, a traditional online hydrogen electric power meter is adopted for a steam-water sampling frame of a thermal power plant, each steam sample is provided with a cation exchange resin column, the hydrogen electric conductivity of the water sample is tested after the water sample passes through the cation exchange resin column, the resin can gradually lose efficacy in the using process, and when the resin completely loses efficacy, the resin needs to be replaced, the hydrogen electric conductivity test is interrupted, and the monitoring continuity cannot be ensured; after the resin is invalid, operators cannot find and replace the resin at the first time, so that monitoring data are abnormal; the general ion exchange resin column is installed behind soda sample rack, and the inside chemical instrumentation, pipeline are various, have increased the degree of difficulty of fortune dimension management.
The invention discloses an invention patent application named as 'a power plant steam-water sampling frame hydrogen conductivity meter and a working method thereof' in a Chinese patent with the publication number of CN112162018A, the publication number of which is 2021, 01 and 01. The multi-channel continuous electrically-regenerated cation exchanger integrated equipment in the patent application comprises a shell case and a plurality of continuous electrically-regenerated cation exchangers arranged in the shell case, wherein one continuous electrically-regenerated cation exchanger corresponds to one detection branch circuit, the detection branch circuit comprises a conductivity electrode and a conductivity meter, a water sample inlet is arranged on the continuous electrically-regenerated cation exchanger, a water sample outlet of the continuous electrically-regenerated cation exchanger is communicated with an inlet of the conductivity electrode, an outlet of the conductivity electrode is communicated with a regeneration inlet of the continuous electrically-regenerated cation exchanger, a regeneration outlet is arranged on the continuous electrically-regenerated cation exchanger, and the conductivity electrode is connected with the conductivity meter; but can not satisfy current measurement demand, can not guarantee the continuity of monitoring, and the data is unusual can not in time carry out the operation and maintenance and change, so it still has above-mentioned defect.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the automatic continuous method for the hydrogen conductivity of the steam-water sampling, which is safe and reliable, can realize the synchronous monitoring of the hydrogen conductivity and the conductivity, automatically judges the effectiveness of the hydrogen conductivity, is timely and convenient to operate and maintain and is stable in measurement.
The technical scheme adopted by the invention for solving the problems is as follows: the automatic continuous measurement method for the hydrogen conductivity of the steam-water sampling is characterized by comprising the following steps: the automatic continuous measuring device of soda sample hydrogen conductivity includes first valve, second valve, third valve, fourth valve, first flowmeter, second flowmeter, control system, water inlet and delivery port, its characterized in that: the water inlet is respectively connected with the first valve, the second valve and the inlet of the second flowmeter, and the third valve and the fourth valve are both connected with the inlet of the first flowmeter; the first valve is connected with the inlet of the first cation exchange resin column, and the second valve is connected with the inlet of the second cation exchange resin column; the outlet of the first cation exchange resin column is connected with the third valve, and the outlet of the second cation exchange resin column is connected with the inlet of the fourth valve; the outlet of the first flowmeter is connected with the inlet of the first conductivity tester, and the outlet of the second flowmeter is connected with the inlet of the second conductivity tester; the outlet of the first conductivity tester and the outlet of the second conductivity tester are both connected with the water outlet; the first valve, the second valve, the third valve, the fourth valve, the first conductivity tester and the second conductivity tester are all connected with the control system;
the method for automatically and continuously measuring the hydrogen conductivity of the steam-water sampling comprises the following specific steps:
s1: a water sample enters through the water inlet, passes through the second flowmeter and the second conductivity tester, and is tested for conductivity by the second conductivity tester, so that the conductivity value of the obtained water sample is A2;
s2: opening the first valve and the third valve, closing the second valve and the fourth valve, enabling the water sample to sequentially pass through the first cation exchange resin column, the first flowmeter and the first conductivity tester, and testing the hydrogen conductivity of the water sample by using the first conductivity tester to obtain a water sample hydrogen conductivity value A1;
s3: when the control system monitors that A1 reaches 50% A2 or above, the control system judges that the first cation exchange resin column fails, the control system controls to open the second valve and the fourth valve, synchronously close the first valve and the third valve, and continuously utilizes the first conductivity tester to measure the hydrogen conductivity A1 of the water sample after the water sample passes through the second cation exchange resin column; the control system synchronously prompts the concrete condition of the failed resin column; timely replacing the first cation exchange resin column which is out of work after the operator is prompted;
s4: when the control system monitors that A1 reaches 50% A2 or above, the control system judges that the second cation exchange resin column fails, the control system controls to open the first valve and the third valve and synchronously close the second valve and the fourth valve, and after a water sample passes through the first cation exchange resin column, the first conductivity tester is continuously utilized to measure the hydrogen conductivity A1 of the water sample; the control system synchronously prompts the concrete condition of the failed resin column; after the operator is prompted, replacing the failed second cation exchange resin column in time;
s5: by the real-time control of the control system, the continuous closed circulation of the S3-S4 is realized by repeating the steps of S3-S4, and the on-line continuous automatic measurement of the hydrogen conductivity of the water sample can be realized.
Compared with the prior art, the invention has the following advantages and effects: the device has the advantages of simple and reasonable integral structure design, safety and reliability, capability of realizing the synchronous monitoring of hydrogen conductivity and conductivity, automatic judgment of the effectiveness of the hydrogen conductivity, automatic and continuous measurement of the hydrogen conductivity, avoidance of interruption of the hydrogen conductivity monitoring and abnormity of monitoring data, realization of the prompt of failure of the cation exchange resin column and convenience for timely operation and maintenance replacement.
Drawings
FIG. 1 is a system diagram of an embodiment of the present invention.
In the figure: the device comprises a first valve 1, a second valve 2, a first cation exchange resin column 3, a second cation exchange resin column 4, a third valve 5, a fourth valve 6, a first flowmeter 7, a second flowmeter 8, a first conductivity tester 9, a second conductivity tester 10, a control system 11, a water inlet 12 and a water outlet 13.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples
Referring to fig. 1, the automatic continuous measurement device for hydrogen conductivity in steam-water sampling according to the present embodiment includes a first valve 1, a second valve 2, a first cation exchange resin column 3, a second cation exchange resin column 4, a third valve 5, a fourth valve 6, a first flow meter 7, a second flow meter 8, a first conductivity tester 9, a second conductivity tester 10, a control system 11, a water sample inlet 12, and a water sample outlet 13. A water inlet 12 of a water sample is respectively connected with inlets of the first valve 1, the second valve 2 and the second flowmeter 8; the first valve 1 is connected with the inlet of a first cation exchange resin column 3, and the second valve 2 is connected with the inlet of a second cation exchange resin column 4; the outlet of the first cation exchange resin column 3 is connected with the third valve 5, and the outlet of the second cation exchange resin column 4 is connected with the inlet of the fourth valve 6; the third valve 5 and the fourth valve 6 are both connected with the inlet of the first flowmeter 7; the outlet of the first flowmeter 7 is connected with the inlet of a first conductivity tester 9, and the outlet of the second flowmeter 8 is connected with the inlet of a second conductivity tester 10; the outlet of the first conductivity tester 9 and the outlet of the second conductivity tester 10 are both connected with the water outlet 13 of the water sample; the first valve 1, the second valve 2, the third valve 5, the fourth valve 6, the first conductivity tester 9 and the second conductivity tester 10 are all connected with a control system 11.
The method for automatically and continuously measuring the hydrogen conductivity in the steam-water sampling comprises the following steps of:
s1: a water sample enters through a water sample inlet 12, the water sample passes through a second flowmeter 8 and a second conductivity tester 10, the second conductivity tester 10 is used for testing the conductivity of the water sample, and the conductivity value of the obtained water sample is A2;
s2: opening the first valve 1 and the third valve 5, closing the second valve 2 and the fourth valve 6, enabling the water sample to sequentially pass through the first cation exchange resin column 3, the first flowmeter 7 and the first conductivity tester 9, and testing the hydrogen conductivity of the water sample by using the first conductivity tester 9 to obtain a water sample hydrogen conductivity value A1;
s3: when the control system 11 monitors that A1 reaches 50% A2 or above, the control system 11 judges that the first cation exchange resin column 3 is invalid, the control system 11 controls to open the second valve 2 and the fourth valve 6, synchronously close the first valve 1 and the third valve 5, and after a water sample passes through the second cation exchange resin column 4, the first conductivity tester 9 is continuously utilized to measure the hydrogen conductivity A1 of the water sample; the control system 11 synchronously prompts the concrete condition of the failed resin column; and (4) timely replacing the first cation exchange resin column 3 which is out of work after the operator is prompted.
S4: when the control system 11 monitors that A1 reaches 50% A2 or above, the control system 11 judges that the second cation exchange resin column 4 is invalid, the control system 11 controls to open the first valve 1 and the third valve 5, synchronously close the second valve 2 and the fourth valve 5, and after a water sample passes through the first cation exchange resin column 3, the first conductivity tester 9 is continuously utilized to measure the hydrogen conductivity A1 of the water sample; the control system 11 synchronously prompts the concrete condition of the failed resin column; and (4) timely replacing the failed second cation exchange resin column 4 after the prompt is given by the operator.
S5: by the real-time control of the control system 11, the continuous closed circulation of S3-S4 is realized by repeating S3-S4, and the on-line continuous automatic measurement of the hydrogen conductivity of the water sample can be realized.
In the embodiment, the first valve 1, the second valve 2, the third valve 5 and the fourth valve 6 are all electrically operated valves; and the valve is connected with a control system 11, so that automatic opening and closing and control of any valve opening degree can be realized.
The first flowmeter 7 and the second flowmeter 8 are both rotor flowmeters in the embodiment; the flow can be regulated and displayed.
The control system 11 of this embodiment adopts a DCS control system or a PLC control system; other control systems 11 that can achieve this effect may also be used.
The connecting pipeline material of all the devices in the embodiment can be stainless steel pipelines, PVP pipelines and the like.
The embodiment can realize the synchronous monitoring of the hydrogen conductivity and the conductivity, automatically judge the effectiveness of the hydrogen conductivity, realize the automatic continuous measurement of the hydrogen conductivity, avoid the interruption of the monitoring of the hydrogen conductivity and the abnormity of monitoring data, realize the prompt of the failure of the cation exchange resin column and facilitate the timely operation and maintenance replacement.
And will be apparent to those skilled in the art from the foregoing description.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (1)
1. An automatic continuous measurement method for hydrogen conductivity in steam-water sampling is characterized in that: automatic continuous measuring device of soda sample hydrogen conductivity includes first valve (1), second valve (2), third valve (5), fourth valve (6), first flowmeter (7), second flowmeter (8), control system (11), water inlet (12) and delivery port (13), its characterized in that: the device is characterized by further comprising a first cation exchange resin column (3), a second cation exchange resin column (4), a first conductivity tester (9) and a second conductivity tester (10), wherein the water inlet (12) is respectively connected with inlets of the first valve (1), the second valve (2) and the second flowmeter (8), and the third valve (5) and the fourth valve (6) are respectively connected with an inlet of the first flowmeter (7); the first valve (1) is connected with the inlet of the first cation exchange resin column (3), and the second valve (2) is connected with the inlet of the second cation exchange resin column (4); the outlet of the first cation exchange resin column (3) is connected with a third valve (5), and the outlet of the second cation exchange resin column (4) is connected with the inlet of a fourth valve (6); the outlet of the first flowmeter (7) is connected with the inlet of a first conductivity tester (9), and the outlet of the second flowmeter (8) is connected with the inlet of a second conductivity tester (10); the outlet of the first conductivity tester (9) and the outlet of the second conductivity tester (10) are both connected with the water outlet (13); the first valve (1), the second valve (2), the third valve (5), the fourth valve (6), the first conductivity tester (9) and the second conductivity tester (10) are all connected with a control system (11);
the method for automatically and continuously measuring the hydrogen conductivity of the steam-water sampling comprises the following specific steps:
s1: a water sample enters through the water inlet (12), passes through the second flowmeter (8) and the second conductivity tester (10), and is tested for conductivity by the second conductivity tester (10), so that the conductivity value of the obtained water sample is A2;
s2: opening a first valve (1) and a third valve (5), closing a second valve (2) and a fourth valve (6), enabling the water sample to sequentially pass through a first cation exchange resin column (3), a first flowmeter (7) and a first conductivity tester (9), and testing the hydrogen conductivity of the water sample by using the first conductivity tester (9) to obtain a water sample hydrogen conductivity value A1;
s3: when the control system (11) monitors that A1 reaches 50% A2 or above, the control system (11) judges that the first cation exchange resin column (3) fails, the control system (11) controls to open the second valve (2) and the fourth valve (6), synchronously close the first valve (1) and the third valve (5), and the first conductivity tester (9) is continuously utilized to measure the hydrogen conductivity A1 of the water sample after the water sample passes through the second cation exchange resin column (4); the control system (11) synchronously prompts the specific condition of the failed resin column; after the prompt is given, the operator replaces the first cation exchange resin column (3) which is out of work in time;
s4: when the control system (11) monitors that A1 reaches 50% A2 or above, the control system (11) judges that the second cation exchange resin column (4) fails, the control system (11) controls to open the first valve (1) and the third valve (5) and synchronously close the second valve (2) and the fourth valve (6), and after a water sample passes through the first cation exchange resin column (3), the first conductivity tester (9) is continuously utilized to measure the hydrogen conductivity A1 of the water sample; the control system (11) synchronously prompts the specific condition of the failed resin column; after the operator is prompted, the invalid second cation exchange resin column (4) is replaced in time;
s5: by real-time control of the control system (11), S3-S4 are repeated, continuous closed circulation of S3-S4 is realized, and online continuous automatic measurement of hydrogen conductivity of the water sample can be realized.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115739207A (en) * | 2022-12-14 | 2023-03-07 | 西安热工研究院有限公司 | Automatic control system and method for quitting operation of ion exchanger |
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