CN111610297A - Constant volume absorption device for ammonia escape measurement by absorption method and working method thereof - Google Patents
Constant volume absorption device for ammonia escape measurement by absorption method and working method thereof Download PDFInfo
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- CN111610297A CN111610297A CN202010567317.9A CN202010567317A CN111610297A CN 111610297 A CN111610297 A CN 111610297A CN 202010567317 A CN202010567317 A CN 202010567317A CN 111610297 A CN111610297 A CN 111610297A
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Abstract
The invention discloses a constant-volume absorption device for ammonia escape measurement by an absorption method and a working method thereof, and belongs to the technical field of ammonia escape measurement for flue gas denitration. When the device works, different overflow pipes are selected, the time for supplementing the absorption liquid by the absorption liquid is set, the absorption bottle is ensured to overflow from the designated overflow pipe, and then the constant volume corresponding to the absorption liquid is determined. The problem that the constant volume of the absorption liquid cannot be obtained on line due to the fact that the absorption liquid is small in volume and cannot be measured by a conventional liquid level meter and a conventional flow meter is solved, the problem of errors caused by the fact that the absorption liquid is measured by an absorption liquid supplementing pump is solved, the accuracy of an ammonia escape measuring system is improved, and the method has important significance.
Description
Technical Field
The invention relates to the technical field of measurement of ammonia escape in flue gas denitration, in particular to a constant volume absorption device for ammonia escape measurement by an absorption method and a working method thereof.
Background
Denitration efficiency is higher and higher after the implementation of ultra-low emission denitration in China, ammonia escape of a corresponding denitration outlet presents a rising trend, and the influence degree of the ammonia escape of the denitration outlet on the safe operation of a power plant is more and more concerned. With the improvement of the requirement on the measurement precision of ammonia escape, an ammonia escape on-line analyzer based on a chemical method is widely researched, and the method has higher measurement accuracy by using dilute sulfuric acid as absorption liquid to collect ammonia in flue gas, but has higher precision requirement on the constant volume of the absorption liquid.
The absorption liquid volume is small, so that the conventional liquid level meter and the conventional flow meter cannot be used for metering, the absorption liquid volume metering by using the absorption liquid replenishing pump has large errors, the pipeline deforms to different degrees along with the increase of the running time, and the error of the absorption liquid volume metering by using the absorption liquid replenishing pump has great uncertainty, so that the problem of how to realize the online stable constant volume of the absorption liquid is the current difficulty. Therefore, the absorption constant volume device capable of realizing online constant volume is provided, and has important significance for improving the precision of the ammonia escape measuring device based on a chemical method.
Disclosure of Invention
The invention aims to provide a constant volume absorption device for ammonia escape measurement by an absorption method and a working method thereof, and aims to solve the problem that the constant volume of absorption liquid cannot be stably determined on line.
In order to solve the technical problem, the invention provides a constant volume absorption device for ammonia escape measurement by an absorption method, which comprises:
an ammonia absorption unit for absorbing escaped ammonia;
the absorption liquid replenishing unit is communicated with the ammonia absorption unit and is used for replenishing new absorption liquid into the ammonia absorption unit;
the absorption liquid discharge unit comprises a waste liquid collection tank, a bottom discharge pipe and overflow pipes which are used for communicating the waste liquid collection tank with the ammonia absorption unit, and electromagnetic valves arranged on the bottom discharge pipe and the overflow pipes, wherein the overflow pipes are multiple in number, one ends of the overflow pipes are located at different heights of the ammonia absorption unit, the overflow pipes are used for discharging the absorption liquid overflowing after the ammonia absorption unit is subjected to constant volume to the waste liquid collection tank, and the bottom discharge pipe is used for discharging all the residual absorption liquid in the ammonia absorption unit to the waste liquid collection tank;
and an ammonia analysis unit for detecting the ammonia concentration in the ammonia absorption unit.
Preferably, the ammonia absorption unit comprises an absorption bottle, and an air inlet pipe and an air outlet pipe are arranged on the absorption bottle.
Preferably, the volume of the absorption bottle is 3 mL-50 mL.
Preferably, the absorption liquid supplement unit comprises an absorption liquid supplement tank, an absorption liquid supplement pipe communicated between the absorption liquid supplement tank and the absorption bottle, and an absorption liquid supplement pump arranged on the absorption liquid supplement pipe.
Preferably, the pipe diameter of the overflow pipe is 1.5-3 times of the pipe diameter of the absorption liquid replenishing pipe, and the pipe diameter of the bottom discharge pipe is 1.5-3 times of the pipe diameter of the absorption liquid replenishing pipe.
Preferably, the absorption liquid replenishing pipe is connected to the upper gas phase side of the absorption bottle.
Preferably, the volume of the waste liquid collecting tank is 200-300 times of the maximum constant volume of the absorption bottle.
Preferably, the number of overflow pipes is 2-5.
Preferably, the ammonia analysis unit comprises an ammonia analyzer communicated with the absorption bottle, and a solenoid valve is arranged on a pipeline between the ammonia analyzer and the absorption bottle.
In addition, the invention also provides a working method of the constant-volume absorption device for ammonia escape measurement by an absorption method, which comprises the following steps:
s1, opening the electromagnetic valve on the bottom discharge pipe, and discharging all the absorption liquid in the ammonia absorption unit to the waste liquid collection tank;
s2, closing the electromagnetic valve on the bottom discharge pipe, starting the absorption liquid supplement unit, and supplementing new absorption liquid into the ammonia absorption unit;
s3, selecting to open the electromagnetic valve on the overflow pipe with the corresponding height according to the constant volume of the ammonia absorption unit, and simultaneously determining the time for the absorption liquid supplement unit to supplement new absorption liquid according to the constant volume of the ammonia absorption unit to ensure that the absorption liquid in the ammonia absorption unit overflows to the corresponding overflow pipe;
s4, stopping the absorption liquid supplementing unit when the absorption liquid supplementing unit supplements new absorption liquid, and closing the electromagnetic valve on the overflow pipe;
s5, collecting escaped ammonia by an ammonia absorption unit;
s6, finishing sampling by the ammonia absorption unit, and starting sampling analysis by the ammonia analysis unit;
s7, completing sampling by the ammonia analysis unit, and closing an electromagnetic valve on a pipeline between the ammonia analysis unit and the ammonia absorption unit;
s8, opening an electromagnetic valve on the bottom discharge pipe to ensure that the absorption liquid in the ammonia absorption unit is emptied;
s9, closing the electromagnetic valve on the bottom discharge pipe, and ending a sampling period;
s10, return to step S2.
Compared with the prior art, the invention has the characteristics and beneficial effects that: according to the invention, a plurality of overflow pipes are communicated between the absorption bottle and the waste liquid collecting tank, and the overflow pipes are sequentially arranged from bottom to top along the height direction of the absorption bottle. And selecting different overflow pipes, setting the time for supplementing the absorption liquid by the absorption liquid, ensuring that the absorption bottle overflows from the designated overflow pipe, and further determining the corresponding constant volume of the absorption liquid. The problem that the constant volume of the absorption liquid cannot be obtained on line due to the fact that the absorption liquid is small in volume and cannot be measured by a conventional liquid level meter and a conventional flow meter is solved, the problem of errors caused by the fact that the absorption liquid is measured by an absorption liquid supplementing pump is solved, the accuracy of an ammonia escape measuring system is improved, and the method has important significance.
Drawings
FIG. 1 is a schematic diagram of a fixed volume absorption apparatus for absorption-method ammonia slip measurement.
The attached drawings are marked as follows: 11-absorption bottle, 12-air inlet pipe, 13-air outlet pipe, 2-waste liquid collection tank, 3-overflow pipe, 41-absorption liquid supplement tank, 42-absorption liquid supplement pump, 43-absorption liquid supplement pipe, 5-bottom calandria, 6-ammonia analyzer.
Detailed Description
In order to make the technical means, innovative features, objectives and functions realized by the present invention easy to understand, the present invention is further described below.
The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be 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 invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a constant volume absorption device for ammonia slip measurement by absorption method includes an ammonia absorption unit, an absorption liquid supplement unit, an absorption liquid discharge unit, and an ammonia analysis unit. The ammonia absorption unit is used for absorbing escaped ammonia. The absorption liquid replenishing unit is communicated with the ammonia absorption unit and is used for replenishing new absorption liquid to the ammonia absorption unit. Absorption liquid discharge unit includes waste liquid collection tank 2, at the bottom of waste liquid collection tank 2 and ammonia absorption unit intercommunication calandria 5 and overflow pipe 3, and set up the solenoid valve on calandria 5 and overflow pipe 3 at the bottom, the quantity of overflow pipe 3 is a plurality of and the one end of overflow pipe 3 is located ammonia absorption unit's not co-altitude department, overflow pipe 3 is used for arranging the absorption liquid of overflow behind the ammonia absorption unit constant volume to waste liquid collection tank 2, at the bottom of calandria 5 be used for with the ammonia absorption unit in the remaining absorption liquid all arrange to waste liquid collection tank 2. The ammonia analysis unit is used for detecting the ammonia concentration in the ammonia absorption unit.
The ammonia absorption unit comprises an absorption bottle 11, and an air inlet pipe 12 and an air outlet pipe 13 are arranged on the absorption bottle 11. The constant volume of the absorption bottle 11 is 3 mL-50 mL.
The absorbent replenishment unit includes an absorbent replenishment tank 41, an absorbent replenishment pipe 43 communicating between the absorbent replenishment tank 41 and the absorption bottle 11, and an absorbent replenishment pump 42 provided in the absorbent replenishment pipe 43. The absorption liquid replenishing pipe 43 is connected to the upper gas phase side of the absorption bottle 11, and here, since the absorption liquid is present in the lower part of the absorption bottle 11 and the upper part is the gas phase side, the absorption liquid replenishing pipe 43 is connected to the upper gas phase side of the absorption bottle 11.
The number of overflow pipes 3 is 2-5. The pipe diameter of the overflow pipe 3 is 1.5-3 times of the pipe diameter of the absorption liquid replenishing pipe 43, and the pipe diameter of the bottom discharge pipe 5 is 1.5-3 times of the pipe diameter of the absorption liquid replenishing pipe 43. The volume of the waste liquid collecting tank 2 is 200-300 times of the maximum constant volume of the absorption bottle 11.
The ammonia analysis unit comprises an ammonia analyzer 6 communicated with an absorption bottle 11, and an electromagnetic valve is arranged on a pipeline between the ammonia analyzer 6 and the absorption bottle 11.
The working method of the constant-volume absorption device for ammonia escape measurement by the absorption method comprises the following steps:
and S1, opening the electromagnetic valve on the bottom discharge pipe 5, and discharging all the absorption liquid in the ammonia absorption unit to the waste liquid collection tank 2.
S2, the electromagnetic valve on the bottom discharge pipe 5 is closed, the absorption liquid replenishing pump 42 is started, and new absorption liquid is replenished into the absorption bottle 11.
S3, the electromagnetic valve on the overflow pipe 3 with the corresponding height is selectively opened according to the constant volume of the absorption bottle 11, and meanwhile, the time for the absorption liquid replenishing pump 42 to replenish new absorption liquid is determined according to the constant volume of the ammonia absorption unit, so that the absorption liquid in the absorption bottle 11 is ensured to overflow to the corresponding overflow pipe 3.
S4, when the absorption liquid replenishing pump 42 is replenishing the new absorption liquid, the absorption liquid replenishing pump 42 is stopped, and the electromagnetic valve on the overflow pipe 3 is closed.
S5, the escaped ammonia enters the absorption bottle 11 from the air inlet pipe 12, and the absorption bottle 11 starts to collect the escaped ammonia.
And S6, after sampling of the absorption bottle 11 is finished, opening the electromagnetic valve on the pipeline between the ammonia analyzer 6 and the absorption bottle 11. The ammonia analyzer 6 starts sampling analysis.
And S7, completing sampling by the ammonia analyzer 6, and closing the electromagnetic valve on the pipeline between the ammonia analyzer 6 and the absorption bottle 11.
And S8, opening the electromagnetic valve on the bottom discharge pipe 5 to ensure that the absorption liquid in the absorption bottle 11 is emptied.
And S9, closing the electromagnetic valve on the bottom discharge pipe 5, and ending a sampling period.
S10, return to step S2.
The above examples are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (10)
1. A constant volume absorption device for ammonia escape measurement by an absorption method is characterized by comprising:
an ammonia absorption unit for absorbing escaped ammonia;
the absorption liquid replenishing unit is communicated with the ammonia absorption unit and is used for replenishing new absorption liquid into the ammonia absorption unit;
the absorption liquid discharge unit comprises a waste liquid collection tank (2), a bottom discharge pipe (5) and an overflow pipe (3) which are used for communicating the waste liquid collection tank (2) with the ammonia absorption unit, and electromagnetic valves arranged on the bottom discharge pipe (5) and the overflow pipe (3), wherein the overflow pipes (3) are in a plurality and one ends of the overflow pipes (3) are located at different heights of the ammonia absorption unit, the overflow pipe (3) is used for discharging the absorption liquid overflowing after the ammonia absorption unit is subjected to constant volume to the waste liquid collection tank (2), and the bottom discharge pipe (5) is used for discharging the rest absorption liquid in the ammonia absorption unit to the waste liquid collection tank (2);
and an ammonia analysis unit for detecting the ammonia concentration in the ammonia absorption unit.
2. The constant volume absorption device for absorption-process ammonia slip measurement as set forth in claim 1, wherein: the ammonia absorption unit comprises an absorption bottle (11), and an air inlet pipe (12) and an air outlet pipe (13) are arranged on the absorption bottle (11).
3. The constant volume absorption device for absorption-process ammonia slip measurement as set forth in claim 2, wherein: the constant volume of the absorption bottle (11) is 3-50 mL.
4. The constant volume absorption device for absorption-process ammonia slip measurement as set forth in claim 2, wherein: the absorption liquid replenishing unit comprises an absorption liquid replenishing tank (41), an absorption liquid replenishing pipe (43) communicated between the absorption liquid replenishing tank (41) and the absorption bottle (11), and an absorption liquid replenishing pump (42) arranged on the absorption liquid replenishing pipe (43).
5. The constant volume absorption device for absorption-process ammonia slip measurement as set forth in claim 4, wherein: the pipe diameter of the overflow pipe (3) is 1.5-3 times of that of the absorption liquid replenishing pipe (43), and the pipe diameter of the bottom discharge pipe (5) is 1.5-3 times of that of the absorption liquid replenishing pipe (43).
6. The constant volume absorption device for absorption-process ammonia slip measurement as set forth in claim 4, wherein: the absorption liquid replenishing pipe (43) is connected to the upper gas phase side of the absorption bottle (11).
7. The constant volume absorption device for absorption-process ammonia slip measurement as set forth in claim 2, wherein: the volume of the waste liquid collecting tank (2) is 200-300 times of the maximum constant volume of the absorption bottle (11).
8. The constant volume absorption device for absorption-process ammonia slip measurement as set forth in claim 1, wherein: the number of the overflow pipes (3) is 2-5.
9. The constant volume absorption device for absorption-process ammonia slip measurement as set forth in claim 2, wherein: the ammonia analysis unit comprises an ammonia analyzer (6) communicated with an absorption bottle (11), and an electromagnetic valve is arranged on a pipeline between the ammonia analyzer (6) and the absorption bottle (11).
10. A method of operating a constant volume absorption unit for absorption ammonia slip measurement as claimed in any one of claims 1 to 9, comprising the steps of:
s1, opening the electromagnetic valve on the bottom discharge pipe (5) and discharging all the absorption liquid in the ammonia absorption unit to the waste liquid collection tank (2);
s2, closing the electromagnetic valve on the bottom discharge pipe (5), starting the absorption liquid supplement unit, and supplementing new absorption liquid into the ammonia absorption unit;
s3, selecting to open the electromagnetic valve on the overflow pipe (3) with the corresponding height according to the constant volume of the ammonia absorption unit, and simultaneously determining the time for the absorption liquid supplement unit to supplement new absorption liquid according to the constant volume of the ammonia absorption unit to ensure that the absorption liquid in the ammonia absorption unit overflows to the corresponding overflow pipe (3);
s4, stopping the absorption liquid supplementing unit when the absorption liquid supplementing unit supplements new absorption liquid, and closing the electromagnetic valve on the overflow pipe (3);
s5, collecting escaped ammonia by an ammonia absorption unit;
s6, finishing sampling by the ammonia absorption unit, and starting sampling by the ammonia analysis unit;
s7, completing sampling by the ammonia analysis unit, and closing an electromagnetic valve on a pipeline between the ammonia analysis unit and the ammonia absorption unit;
s8, opening an electromagnetic valve on the bottom discharge pipe (5) to ensure that the absorption liquid in the ammonia absorption unit is emptied;
s9, closing the electromagnetic valve on the bottom discharge pipe (5), and ending a sampling period;
s10, return to step S2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010567317.9A CN111610297A (en) | 2020-06-19 | 2020-06-19 | Constant volume absorption device for ammonia escape measurement by absorption method and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010567317.9A CN111610297A (en) | 2020-06-19 | 2020-06-19 | Constant volume absorption device for ammonia escape measurement by absorption method and working method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5131260A (en) * | 1990-03-31 | 1992-07-21 | Degussa Ag | Device and method for the continuous measurement of the ammonia concentration in gases in the ppm range |
| CN201880510U (en) * | 2010-07-23 | 2011-06-29 | 弘敬企业有限公司 | Device for proportionally mixing fluids |
| CN103033600A (en) * | 2012-12-12 | 2013-04-10 | 武汉钢铁(集团)公司 | Determination method and determination device for ammonia escape |
| US20140322117A1 (en) * | 2013-04-27 | 2014-10-30 | Pangang Group Panzhihua Iron And Steel Research Institute Co., Ltd. | Method for detecting loss of desulfurization organic components and regenerable flue gas desulfurization process |
| CN105675694A (en) * | 2016-01-18 | 2016-06-15 | 西安交通大学 | Smoke component concentration measurement system and smoke component concentration measurement method |
| CN212275711U (en) * | 2020-06-19 | 2021-01-01 | 北京国电龙源环保工程有限公司 | Constant volume absorption device for ammonia escape measurement |
-
2020
- 2020-06-19 CN CN202010567317.9A patent/CN111610297A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5131260A (en) * | 1990-03-31 | 1992-07-21 | Degussa Ag | Device and method for the continuous measurement of the ammonia concentration in gases in the ppm range |
| CN201880510U (en) * | 2010-07-23 | 2011-06-29 | 弘敬企业有限公司 | Device for proportionally mixing fluids |
| CN103033600A (en) * | 2012-12-12 | 2013-04-10 | 武汉钢铁(集团)公司 | Determination method and determination device for ammonia escape |
| US20140322117A1 (en) * | 2013-04-27 | 2014-10-30 | Pangang Group Panzhihua Iron And Steel Research Institute Co., Ltd. | Method for detecting loss of desulfurization organic components and regenerable flue gas desulfurization process |
| CN105675694A (en) * | 2016-01-18 | 2016-06-15 | 西安交通大学 | Smoke component concentration measurement system and smoke component concentration measurement method |
| CN212275711U (en) * | 2020-06-19 | 2021-01-01 | 北京国电龙源环保工程有限公司 | Constant volume absorption device for ammonia escape measurement |
Non-Patent Citations (1)
| Title |
|---|
| 房海超等: "煤气中氨含量的测定", 《化肥工业》 * |
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