CN203090744U - Steam direct-heating liquid ammonia evaporation process control system for flue gas denitration - Google Patents
Steam direct-heating liquid ammonia evaporation process control system for flue gas denitration Download PDFInfo
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- CN203090744U CN203090744U CN 201320145862 CN201320145862U CN203090744U CN 203090744 U CN203090744 U CN 203090744U CN 201320145862 CN201320145862 CN 201320145862 CN 201320145862 U CN201320145862 U CN 201320145862U CN 203090744 U CN203090744 U CN 203090744U
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- liquefied ammonia
- evaporimeter
- transmitter
- liquid ammonia
- ammonia evaporator
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Abstract
The utility model discloses a steam direct-heating liquid ammonia evaporation process control system for flue gas denitration. The system comprises a liquid ammonia evaporator body, wherein the liquid ammonia evaporator body is also provided with a liquid ammonia evaporator pressure transmitter, a liquid ammonia evaporator local pressure gauge, a liquid ammonia evaporator ammonia temperature transmitter and a liquid ammonia evaporator liquid level transmitter; and the liquid ammonia evaporator liquid level transmitter is arranged below the liquid ammonia evaporator pressure transmitter, the liquid ammonia evaporator local pressure gauge and the liquid ammonia evaporator ammonia temperature transmitter. By adopting a direct heating mode, the flue gas denitration system disclosed by the utility model avoids the abnormal phenomena such as excess pressure, excess liquid and the like of the liquid ammonia evaporator, and realizes safe and stable operation of the denitration system.
Description
Technical field
The utility model relates to a kind of liquefied ammonia evaporation control system, relates to a kind of steam that is used for denitrating flue gas in particular and directly heats the liquefied ammonia evaporation control system.
Background technology
Coal can produce nitrogen oxide NOx in combustion process, nitrogen oxide NOx is a kind of atmosphere pollution, NOx can further generate photochemical fog under the situation that carbonaceous material exists, the more important thing is that NOx can form acid rain and damages the ozone layer, cause greenhouse effects, bring serious harm for natural environment and human health.National environmental protection portion has issued " GB13223-2011 thermal power plant atmosphere pollutants emission standards " on July 29th, 2011.The coal-fired unit that standard-required built up after 31 days December in 2003 after 1 day July in 2014 in the flue gas NOx concentration of emission be no more than 100 mg/Nm
3Denitrating flue gas becomes another major fields of China's control thermal power plant pollutant emission after flue gas desulfurization.From existing denitrating technique, be that selective catalytic reduction (being SCR) or non-selective catalytic reduction (SNCR) technology all are to utilize ammonia as reducing agent the NOx in the flue gas to be reduced into N
2And H
2O, thereby the purpose of realization denitration.The required ammonia of most of denitration all utilizes the liquefied ammonia heating evaporation to obtain, therefore, the stable control of liquefied ammonia vapo(u)rization system will influence the stable operation of whole denitrating system, if it is improper to control, liquefied ammonia evaporimeter superpressure can occurs, cross anomaly such as liquid and influence the normal operation of denitrating system or security incident occurs.
The utility model content
There are anomalies such as liquefied ammonia evaporimeter superpressure, mistake liquid in the liquefied ammonia heating evaporation process that the purpose of this utility model is to overcome in the existing flue gas denitrification system, provide a kind of steam that is used for denitrating flue gas directly to heat liquefied ammonia evaporation process control system, this system utilizes the direct-fired mode of steam, realizes safety, the stable operation of denitrating system.
The purpose of this utility model is achieved through the following technical solutions: a kind of steam that is used for denitrating flue gas directly heats liquefied ammonia evaporation process control system, comprise the liquefied ammonia evaporator body, be provided with liquefied ammonia evaporator pressure transmitter, liquefied ammonia evaporimeter Pressure gauge, liquefied ammonia evaporimeter gas ammonia temperature transmitter and liquefied ammonia evaporimeter fluid level transmitter on the spot on the described liquefied ammonia evaporator body simultaneously, and liquefied ammonia evaporimeter fluid level transmitter is arranged on liquefied ammonia evaporator pressure transmitter, the liquefied ammonia evaporimeter below of Pressure gauge, liquefied ammonia evaporimeter gas ammonia temperature transmitter on the spot simultaneously.
In technique scheme, utilize Pressure gauge, the liquefied ammonia evaporimeter gas ammonia temperature transmitter control and show the pressure and the temperature of the liquefied ammonia in the evaporator body on the spot of liquefied ammonia evaporator pressure transmitter, liquefied ammonia evaporimeter, handled easily personnel's control and adjusting guarantee that work safety stably moves.
Further, described liquefied ammonia evaporator pressure transmitter is connected with liquefied ammonia evaporimeter steam inlet control valve, and liquefied ammonia evaporimeter steam inlet control valve is communicated with the liquefied ammonia evaporator body.Liquefied ammonia evaporimeter steam inlet control valve and liquefied ammonia evaporator pressure transmitter adopt chain state, control by signal, utilize the steam feed amount of liquefied ammonia evaporimeter steam inlet control valve regulator solution ammonia evaporator body, control liquefied ammonia evaporator body pressure inside well.
Further, described liquefied ammonia evaporimeter fluid level transmitter is connected with liquefied ammonia evaporimeter liquefied ammonia inlet adjusting valve, and liquefied ammonia evaporimeter liquefied ammonia inlet adjusting valve is communicated with the liquefied ammonia evaporator body.Liquefied ammonia evaporimeter liquefied ammonia inlet adjusting valve and liquefied ammonia evaporimeter fluid level transmitter adopt chain state, by signal controlling, utilize liquefied ammonia in the liquefied ammonia evaporimeter liquefied ammonia inlet adjusting valve regulation liquefied ammonia evaporator body, control liquid level in the liquefied ammonia evaporator body well.
Further, described liquefied ammonia evaporimeter fluid level transmitter is arranged on the side of liquefied ammonia evaporator body, and the height of liquefied ammonia evaporimeter fluid level transmitter is identical with the height of liquefied ammonia evaporator body.Liquefied ammonia evaporimeter fluid level transmitter just is equivalent to liquid level gauge, and the liquid level of the liquefied ammonia in the liquefied ammonia evaporator body is shown, transmits simultaneously.
Further, Pressure gauge and liquefied ammonia evaporimeter gas ammonia temperature transmitter all are arranged on the top of liquefied ammonia evaporator body on the spot for described liquefied ammonia evaporator pressure transmitter, liquefied ammonia evaporimeter.With liquefied ammonia evaporator pressure transmitter, liquefied ammonia evaporimeter on the spot Pressure gauge and liquefied ammonia evaporimeter gas ammonia temperature transmitter be arranged on the top of liquefied ammonia evaporator body, make that its structure Design is more reasonable, the circuit transmission pipeline cleans, and is easy for installation and removal.
In sum, the beneficial effects of the utility model are: this flue gas denitrification system utilizes direct-fired mode, has avoided anomalies such as liquefied ammonia evaporimeter superpressure, mistake liquid, realizes safety, the stable operation of denitrating system.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Mark and corresponding parts title in the accompanying drawing: 1-liquefied ammonia evaporator body; 2-liquefied ammonia evaporator pressure transmitter; 3-liquefied ammonia evaporimeter is Pressure gauge on the spot; 4-liquefied ammonia evaporimeter gas ammonia temperature transmitter; 5-liquefied ammonia evaporimeter steam inlet control valve; 6-liquefied ammonia evaporimeter fluid level transmitter; 7-liquefied ammonia evaporimeter liquefied ammonia inlet adjusting valve.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited only to this.
Embodiment 1:
As shown in Figure 1, a kind of steam that is used for denitrating flue gas directly heats liquefied ammonia evaporation process control system, comprise liquefied ammonia evaporator body 1, be provided with liquefied ammonia evaporator pressure transmitter 2, liquefied ammonia evaporimeter Pressure gauge 3, liquefied ammonia evaporimeter gas ammonia temperature transmitter 4 and liquefied ammonia evaporimeter fluid level transmitter 6 on the spot on the described liquefied ammonia evaporator body 1 simultaneously, and liquefied ammonia evaporimeter fluid level transmitter 6 is arranged on liquefied ammonia evaporator pressure transmitter 2, the liquefied ammonia evaporimeter below of Pressure gauge 3, liquefied ammonia evaporimeter gas ammonia temperature transmitter 4 on the spot simultaneously.The utility model is to adopt direct-fired mode, and the utilization ratio height of heat is convenient to system is controlled, and has avoided anomalies such as liquefied ammonia evaporimeter superpressure, mistake liquid, realizes safety, the stable operation of denitrating system.
Embodiment 2:
As shown in Figure 1, on the basis of embodiment 1, described liquefied ammonia evaporator pressure transmitter 2 is connected with liquefied ammonia evaporimeter steam inlet control valve 5, and liquefied ammonia evaporimeter steam inlet control valve 5 is communicated with liquefied ammonia evaporator body 1; Described liquefied ammonia evaporimeter fluid level transmitter 6 is connected with liquefied ammonia evaporimeter liquefied ammonia inlet adjusting valve 7, and liquefied ammonia evaporimeter liquefied ammonia inlet adjusting valve 7 is communicated with liquefied ammonia evaporator body 1; Described liquefied ammonia evaporimeter fluid level transmitter 6 is arranged on the side of liquefied ammonia evaporator body 1, and the height of liquefied ammonia evaporimeter fluid level transmitter 6 is identical with the height of liquefied ammonia evaporator body 1.The inlet of steam is to regulate by liquefied ammonia evaporimeter steam inlet control valve 5, and liquefied ammonia is regulated by liquefied ammonia evaporimeter liquefied ammonia inlet adjusting valve 7, and liquefied ammonia evaporator body 1 is provided with condensation-water drain and gaseous ammonia outlet.
Described liquefied ammonia evaporator pressure transmitter 2, liquefied ammonia evaporimeter Pressure gauge 3 and liquefied ammonia evaporimeter gas ammonia temperature transmitter 4 on the spot all are arranged on the top of liquefied ammonia evaporator body 1.When finding that the evaporator body 1 outlet gas ammonia degree of superheat does not meet the demands, suitably reduce the liquid level of liquefied ammonia evaporator body 1, because liquefied ammonia and steam are that adverse current is carried out heat exchange, utilize steam that the gas ammonia that just has been evaporated is heated to improve its degree of superheat.
Operation principle of the present utility model is: open liquefied ammonia evaporimeter liquefied ammonia inlet adjusting valve 7 and add liquefied ammonia in liquefied ammonia evaporator body 1, control liquefied ammonia evaporimeter fluid level transmitter 6 in normal range (NR) by PID, open liquefied ammonia evaporimeter steam inlet control valve 5, by PID control liquefied ammonia evaporator pressure transmitter 2 and liquefied ammonia evaporimeter on the spot Pressure gauge 3 about 0.6MPa, the liquefied ammonia evaporation is steadily carried out.
When liquefied ammonia evaporimeter gas ammonia temperature is lower than 25 ℃, adjust the liquid level of liquefied ammonia evaporimeter fluid level transmitter 6, to improve the degree of superheat of liquefied ammonia evaporimeter gas ammonia.
As mentioned above, then can realize the utility model well.
Claims (5)
1. a steam that is used for denitrating flue gas directly heats liquefied ammonia evaporation process control system, it is characterized in that: comprise liquefied ammonia evaporator body (1), be provided with liquefied ammonia evaporator pressure transmitter (2) on the described liquefied ammonia evaporator body (1) simultaneously, the liquefied ammonia evaporimeter is Pressure gauge (3) on the spot, liquefied ammonia evaporimeter gas ammonia temperature transmitter (4) and liquefied ammonia evaporimeter fluid level transmitter (6), and liquefied ammonia evaporimeter fluid level transmitter (6) is arranged on liquefied ammonia evaporator pressure transmitter (2) simultaneously, the liquefied ammonia evaporimeter is Pressure gauge (3) on the spot, the below of liquefied ammonia evaporimeter gas ammonia temperature transmitter (4).
2. a kind of steam that is used for denitrating flue gas according to claim 1 directly heats liquefied ammonia evaporation process control system, it is characterized in that: described liquefied ammonia evaporator pressure transmitter (2) is connected with liquefied ammonia evaporimeter steam inlet control valve (5), and liquefied ammonia evaporimeter steam inlet control valve (5) is communicated with liquefied ammonia evaporator body (1).
3. a kind of steam that is used for denitrating flue gas according to claim 1 and 2 directly heats liquefied ammonia evaporation process control system, it is characterized in that: described liquefied ammonia evaporimeter fluid level transmitter (6) is connected with liquefied ammonia evaporimeter liquefied ammonia inlet adjusting valve (7), and liquefied ammonia evaporimeter liquefied ammonia inlet adjusting valve (7) is communicated with liquefied ammonia evaporator body (1).
4. a kind of steam that is used for denitrating flue gas according to claim 3 directly heats liquefied ammonia evaporation process control system, it is characterized in that: described liquefied ammonia evaporimeter fluid level transmitter (6) is arranged on the side of liquefied ammonia evaporator body (1), and the height of liquefied ammonia evaporimeter fluid level transmitter (6) is identical with the height of liquefied ammonia evaporator body (1).
5. a kind of steam that is used for denitrating flue gas according to claim 4 directly heats liquefied ammonia evaporation process control system, it is characterized in that: described liquefied ammonia evaporator pressure transmitter (2), liquefied ammonia evaporimeter Pressure gauge (3) and liquefied ammonia evaporimeter gas ammonia temperature transmitter (4) on the spot all are arranged on the top of liquefied ammonia evaporator body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320145862 CN203090744U (en) | 2013-03-28 | 2013-03-28 | Steam direct-heating liquid ammonia evaporation process control system for flue gas denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320145862 CN203090744U (en) | 2013-03-28 | 2013-03-28 | Steam direct-heating liquid ammonia evaporation process control system for flue gas denitration |
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| Publication Number | Publication Date |
|---|---|
| CN203090744U true CN203090744U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320145862 Expired - Lifetime CN203090744U (en) | 2013-03-28 | 2013-03-28 | Steam direct-heating liquid ammonia evaporation process control system for flue gas denitration |
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| CN (1) | CN203090744U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594517A (en) * | 2016-12-18 | 2017-04-26 | 南通江山农药化工股份有限公司 | Direct gasification system for liquid ammonia and gasification process for direct gasification system |
| CN106706069A (en) * | 2015-11-18 | 2017-05-24 | 浙江大学自贡创新中心 | Ammonia mother liquid barrel liquid level measuring system |
| CN108479362A (en) * | 2018-06-12 | 2018-09-04 | 江苏华本环境科技有限公司 | A kind of SNCR denitration system |
-
2013
- 2013-03-28 CN CN 201320145862 patent/CN203090744U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706069A (en) * | 2015-11-18 | 2017-05-24 | 浙江大学自贡创新中心 | Ammonia mother liquid barrel liquid level measuring system |
| CN106594517A (en) * | 2016-12-18 | 2017-04-26 | 南通江山农药化工股份有限公司 | Direct gasification system for liquid ammonia and gasification process for direct gasification system |
| CN108479362A (en) * | 2018-06-12 | 2018-09-04 | 江苏华本环境科技有限公司 | A kind of SNCR denitration system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHENGDU RAISE ENVIRONMENTAL TECHNOLOGY CO., LTD. Free format text: FORMER NAME: CHENGDU RAISE ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 307 No. 6, building B, No. nine Hing Road, Chengdu hi tech Development Zone, Sichuan, 610000 Patentee after: CHENGDU RAISE ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 307 No. 6, building B, No. nine Hing Road, Chengdu hi tech Development Zone, Sichuan, 610000 Patentee before: Chengdu Raise Environmental Protection Technology Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130731 |