CN107303437A - A kind of liquid ammonia evaporation system - Google Patents
A kind of liquid ammonia evaporation system Download PDFInfo
- Publication number
- CN107303437A CN107303437A CN201610253659.7A CN201610253659A CN107303437A CN 107303437 A CN107303437 A CN 107303437A CN 201610253659 A CN201610253659 A CN 201610253659A CN 107303437 A CN107303437 A CN 107303437A
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- CN
- China
- Prior art keywords
- housing
- pipeline
- evaporator
- liquid ammonia
- ammonia
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0017—Use of electrical or wave energy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0064—Feeding of liquid into an evaporator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0082—Regulation; Control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/02—Evaporators with heating coils
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A kind of liquid ammonia evaporation system, includes the liquid ammonia storage tank being sequentially connected by pipeline, evaporator and liquefied ammonia surge tank, and flowmeter and regulating valve are housed on the pipeline between liquid ammonia storage tank and evaporator, it is characterized in that：The evaporator has housing, water supplement port, sewage draining exit and liquid level gauge and controller are provided with housing, housing is built with the coil pipe for heat exchange, the soft water in housing is contained in as heat transferring medium, and heating wire is housed in housing bottom, pipeline of the entrance point connection from liquid ammonia storage tank of coil pipe, the port of export connects liquefied ammonia surge tank by pipeline；The controller controls the work of heating wire, and by receiving the flow information that flowmeter feeds back, the aperture of valve is controlled to adjust in real time；The present invention is simple in construction, safe and reliable to operation, realizes exchange thermal medium（Soft water）Temperature is automatically controlled with output ammonia air pressure, so as to improve heat exchange efficiency, it is ensured that the safety in production of ammonia, is widely used in the denitrating flue gas field in environmental protection industry (epi).
Description
Technical field
The present invention relates to a kind of liquid ammonia evaporation system being applied in denitrating flue gas field.
Background technology
In denitrating flue gas field, the NOx in flue gas in the presence of catalyst, is selectively reduced to free of contamination nitrogen and water by ammonia as reducing agent, and wherein ammonia is mainly produced by liquid ammonia evaporation system.
Currently, the structure of liquid ammonia evaporation system is as follows：Referring to Fig. 1, liquid ammonia evaporation system includes flowmeter 4 and regulating valve 5 are housed on liquid ammonia storage tank 1, evaporator 2 and the liquefied ammonia surge tank 3 being sequentially connected by pipeline, the pipeline between liquid ammonia storage tank 1 and evaporator 2.Evaporator is connected with the pipeline of boiler side, and the high temperature and high pressure steam that boiler is produced is passed into evaporator, and the coil pipe in evaporator for heat exchange absorbs heat and liquefied ammonia is converted into ammonia, and is delivered in liquefied ammonia surge tank.However, being found in actual job, the steam that boiler side is delivered to the HTHP of evaporator is unstable, it is easy to cause evaporator erosion, evaporator vibrates, and easily triggers security incident, the steam of HTHP heat waste during conveying is serious simultaneously, also results in certain noise pollution.
The content of the invention
Present invention aim to solve in liquid ammonia evaporation system using boiler to evaporator conveying high temperature and high pressure steam for heat exchange, easily trigger security incident, and the problem of there is noise pollution, provide a kind of safe and reliable for this, the liquid ammonia evaporation system of Automated condtrol can be realized.
The present invention concrete scheme be：A kind of liquid ammonia evaporation system, includes the liquid ammonia storage tank being sequentially connected by pipeline, evaporator and liquefied ammonia surge tank, and flowmeter and regulating valve are housed on the pipeline between liquid ammonia storage tank and evaporator, it is characterized in that：The evaporator has housing, water supplement port, sewage draining exit and liquid level gauge and controller are provided with housing, housing is built with the coil pipe for heat exchange, the soft water in housing is contained in as heat transferring medium, and heating wire is housed in housing bottom, pipeline of the entrance point connection from liquid ammonia storage tank of coil pipe, the port of export connects liquefied ammonia surge tank by pipeline；The controller controls the work of heating wire, and by receiving the flow information that flowmeter feeds back, the aperture of valve is controlled to adjust in real time.
PLC and device for power switching are provided with heretofore described controller, temperature sensor is additionally provided with housing；The flow information of liquefied ammonia is transferred to PLC by the flowmeter in real time, PLC controls to adjust the aperture of valve by control program, the temperature information of soft water is transferred to PLC by temperature sensor in real time simultaneously, PLC controls device for power switching output current in real time, to control the power output of heating wire, and by controlling the on/off of device for power switching, to control the operation of heating wire/be stopped.
Safety valve and pressure gauge are housed on the pipeline in the present invention between evaporator and liquefied ammonia surge tank.
The present invention to the evaporator in existing liquid ammonia evaporation system by being improved, be not only simple in structure, it is safe and reliable, efficiently solve that current high temperature and high pressure steam heat waste in course of conveying is too high, noise pollution is big, steam pressure is unstable and the problem of easily triggering security incident, and by using controller, realize exchange thermal medium（Soft water）Temperature is automatically controlled with output ammonia air pressure, so as to improve heat exchange efficiency, it is ensured that the safety in production of ammonia, is widely used in the denitrating flue gas field in environmental protection industry (epi).
Brief description of the drawings
Fig. 1 is the structural representation of liquid ammonia evaporation system in the prior art；
Fig. 2 is the structural representation of the present invention；
Fig. 3 is the control structure block diagram of the present invention.
In figure：1-liquid ammonia storage tank, 2-evaporator, 3-liquefied ammonia surge tank, 4-flowmeter, 5-regulating valve, 6-housing, 7-water supplement port, 8-sewage draining exit, 9-liquid level gauge, 10-controller, 11-coil pipe, 12-soft water, 13-heating wire, 14-PLC, 15-device for power switching, 16-temperature sensor, 17-safety valve, 18-pressure gauge.
Embodiment
Referring to Fig. 2-3, the present invention includes the liquid ammonia storage tank 1 being sequentially connected by pipeline, evaporator 2 and liquefied ammonia surge tank 3, flowmeter 4 and regulating valve 5 are housed on the pipeline between liquid ammonia storage tank 1 and evaporator 2, wherein regulating valve 5 is electric control valve or pneumatic control valve, the evaporator 2 has housing 6, water supplement port 7 is provided with housing 6, sewage draining exit 8 and liquid level gauge 9 and controller 10, housing 6 is built with the coil pipe 11 for heat exchange, the soft water 12 in housing 6 is contained in as heat transferring medium, and heating wire 13 is housed in the bottom of housing 6, pipeline of the entrance point connection from liquid ammonia storage tank 1 of coil pipe 11, the port of export connects liquefied ammonia surge tank 3 by pipeline；The controller 10 controls the work of heating wire 13, and by receiving the flow information that flowmeter 4 feeds back, the aperture of valve 5 is controlled to adjust in real time.
Liquid level gauge 9 is used for the liquid level for facilitating soft water 12 in staff's real-time monitoring housing 6 in the present embodiment.
Referring to Fig. 3, provided with PLC 14 and device for power switching 15 in controller 10 described in the present embodiment, temperature sensor 16 is additionally provided with housing 6；The flow information of liquefied ammonia is transferred to PLC 14 by the flowmeter 4 in real time, PLC 14 controls to adjust the aperture of valve 5 by control program, the temperature information of soft water is transferred to PLC 14 by temperature sensor 16 in real time simultaneously, PLC 14 controls the output current of device for power switching 15 in real time, to control the power output of heating wire 13, and by controlling the on/off of device for power switching 15, to control the operation of heating wire 13/be stopped.
Referring to Fig. 2, safety valve 17 and pressure gauge 18 are housed on the pipeline in the present embodiment between evaporator 2 and liquefied ammonia surge tank 3.
The present invention is in real work, hydraulic pressure in liquid ammonia storage tank is in 1~2MPa, the air pressure of the ammonia exported from evaporator is in 0.3~0.5MPa, so as to which the liquefied ammonia in liquid ammonia storage tank is converted to ammonia after evaporator progress heat exchange is flowed to from the presence of pressure, wherein also the pump housing can be installed on liquid ammonia storage tank to the pipeline between evaporator, liquefied ammonia is blasted in evaporator.During liquefied ammonia is converted to ammonia in the presence of evaporator, by the temperature of controller real-time monitoring soft water, and by controlling to adjust the aperture of valve to adjust the flow velocity of liquefied ammonia, so as to control export ammonia air pressure in rational scope, the safety in production of ammonia is ensure that, the denitrating flue gas field in environmental protection industry (epi) is widely used in.
Claims (3)
1. a kind of liquid ammonia evaporation system, includes the liquid ammonia storage tank being sequentially connected by pipeline, evaporator and liquefied ammonia surge tank, flowmeter and regulating valve are housed on the pipeline between liquid ammonia storage tank and evaporator, it is characterized in that：The evaporator has housing, water supplement port, sewage draining exit and liquid level gauge and controller are provided with housing, housing is built with the coil pipe for heat exchange, the soft water in housing is contained in as heat transferring medium, and heating wire is housed in housing bottom, pipeline of the entrance point connection from liquid ammonia storage tank of coil pipe, the port of export connects liquefied ammonia surge tank by pipeline；The controller controls the work of heating wire, and by receiving the flow information that flowmeter feeds back, the aperture of valve is controlled to adjust in real time.
2. a kind of liquid ammonia evaporation system according to claim 1, it is characterized in that：PLC and device for power switching are provided with the controller, temperature sensor is additionally provided with housing；The flow information of liquefied ammonia is transferred to PLC by the flowmeter in real time, PLC controls to adjust the aperture of valve by control program, the temperature information of soft water is transferred to PLC by temperature sensor in real time simultaneously, PLC controls device for power switching output current in real time, to control the power output of heating wire, and by controlling the on/off of device for power switching, to control the operation of heating wire/be stopped.
3. a kind of liquid ammonia evaporation system according to claim 1, it is characterized in that：Safety valve and pressure gauge are housed on the pipeline between evaporator and liquefied ammonia surge tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610253659.7A CN107303437A (en) | 2016-04-22 | 2016-04-22 | A kind of liquid ammonia evaporation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610253659.7A CN107303437A (en) | 2016-04-22 | 2016-04-22 | A kind of liquid ammonia evaporation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107303437A true CN107303437A (en) | 2017-10-31 |
Family
ID=60151763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610253659.7A Pending CN107303437A (en) | 2016-04-22 | 2016-04-22 | A kind of liquid ammonia evaporation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107303437A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107879359A (en) * | 2017-12-11 | 2018-04-06 | 营口萌达电子科技有限公司 | A kind of liquid ammonia evaporator skid mounted equipment |
| CN108654131A (en) * | 2018-03-19 | 2018-10-16 | 海宁市英德赛电子有限公司 | A kind of liquefied ammonia rectifying column with clean and reuse function |
| CN110064216A (en) * | 2019-04-10 | 2019-07-30 | 湖南福德电气有限公司 | Stepless adjustable evaporator |
| CN112007370A (en) * | 2020-09-23 | 2020-12-01 | 内蒙古通威高纯晶硅有限公司 | Material concentration control system and method |
| CN113730930A (en) * | 2020-05-30 | 2021-12-03 | 上海梅山钢铁股份有限公司 | Liquid ammonia heating device |
| CN114653199A (en) * | 2022-03-01 | 2022-06-24 | 华能国际电力股份有限公司大连电厂 | Ammonia spraying control optimization device for SCR of thermal power plant in severe cold area |
-
2016
- 2016-04-22 CN CN201610253659.7A patent/CN107303437A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107879359A (en) * | 2017-12-11 | 2018-04-06 | 营口萌达电子科技有限公司 | A kind of liquid ammonia evaporator skid mounted equipment |
| CN108654131A (en) * | 2018-03-19 | 2018-10-16 | 海宁市英德赛电子有限公司 | A kind of liquefied ammonia rectifying column with clean and reuse function |
| CN110064216A (en) * | 2019-04-10 | 2019-07-30 | 湖南福德电气有限公司 | Stepless adjustable evaporator |
| CN113730930A (en) * | 2020-05-30 | 2021-12-03 | 上海梅山钢铁股份有限公司 | Liquid ammonia heating device |
| CN112007370A (en) * | 2020-09-23 | 2020-12-01 | 内蒙古通威高纯晶硅有限公司 | Material concentration control system and method |
| CN114653199A (en) * | 2022-03-01 | 2022-06-24 | 华能国际电力股份有限公司大连电厂 | Ammonia spraying control optimization device for SCR of thermal power plant in severe cold area |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171031 |