CN111203077A - Denitration urea spray intelligent control device and method thereof - Google Patents
Denitration urea spray intelligent control device and method thereof Download PDFInfo
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- CN111203077A CN111203077A CN202010257960.1A CN202010257960A CN111203077A CN 111203077 A CN111203077 A CN 111203077A CN 202010257960 A CN202010257960 A CN 202010257960A CN 111203077 A CN111203077 A CN 111203077A
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 239000004202 carbamide Substances 0.000 title claims abstract description 121
- 239000007921 spray Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 claims abstract description 48
- 238000005507 spraying Methods 0.000 claims abstract description 38
- 239000000523 sample Substances 0.000 claims abstract description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003546 flue gas Substances 0.000 claims abstract description 32
- 230000001276 controlling effect Effects 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims description 56
- 238000012544 monitoring process Methods 0.000 claims description 24
- 239000002699 waste material Substances 0.000 claims description 7
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000000779 smoke Substances 0.000 description 11
- 239000000243 solution Substances 0.000 description 10
- 239000000428 dust Substances 0.000 description 6
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses an intelligent control method for denitration urea spraying, which comprises the following steps that a PLC (programmable logic controller) correspondingly stores different electric control valve opening degree control models according to different hearth temperature interval ranges; when the temperature probe collects the temperature of the hearth and sends the temperature information to the PLC, the PLC receives the temperature information of the hearth collected by the temperature probe, compares and judges the temperature range, and calls a corresponding control model according to the temperature range; then generating a valve opening value according to the called control model according to the NOX content information sent by the flue gas on-line monitor device; and sending the generated valve opening value to an electric regulating valve, and controlling the electric regulating valve to be opened according to the corresponding opening degree so as to control the urea spraying amount of the spray gun. The invention can greatly reduce the labor intensity of the furnace operators, improve the utilization rate of the urea solution, reduce the denitration cost and reduce the environmental emission pollution.
Description
Technical Field
The invention relates to the technical field of denitration urea control, in particular to an intelligent denitration urea spray control device and method.
Background
The NOx emission of an industrial boiler is one of urban air pollution sources, and the air pollution is mainly NO2 and NO. The existing denitration mode in the boiler adopts manual regulation to control the urea spraying flow so as to control the NOx content in the boiler smoke not to exceed the standard. However, the above method has the disadvantages that the urea is controlled and regulated manually and lags behind, so that the fluctuation of the NOx content is frequent, the urea is wasted greatly, the denitration cost is high, and the labor intensity of a fireman is high.
Disclosure of Invention
The invention aims to provide a stable and accurate intelligent denitration urea spray control device and method which can be automatically controlled, reduce the labor intensity of a furnace operator and improve the utilization rate of a urea solution.
The invention relates to an intelligent denitration urea spray control device which comprises a spray gun arranged in a boiler hearth, wherein the spray gun is communicated with a urea liquid conveying pipe and a compressed air conveying pipe, and a urea liquid electric regulating valve capable of controlling the opening degree is arranged on the urea liquid conveying pipe;
the temperature probe is used for detecting the temperature of the hearth;
the flue gas on-line monitor device is used for monitoring the content of waste NOx in the chimney;
the PLC is respectively electrically connected with the urea solution electric regulating valve, the temperature probe and the smoke online monitor device and is used for receiving the furnace temperature information sent by the temperature probe and receiving the NOx content information sent by the smoke online monitor device; and generating a valve opening control value according to the hearth temperature information and the NOx content information, sending the valve opening control value to the urea liquid electric regulating valve, and controlling the opening of the urea liquid electric regulating valve so as to control the urea spraying amount of the spray gun.
The denitration urea spray intelligent control method comprises the following steps:
the PLC correspondingly stores different electric control valve opening degree control models according to different hearth temperature interval ranges;
when the temperature probe collects the temperature of the hearth and sends the temperature information to the PLC, the PLC receives the temperature information of the hearth collected by the temperature probe, compares and judges the temperature range, and according to the temperature range, calls a corresponding control model and sets a corresponding initial opening of an electric control valve so as to preliminarily control the urea spraying amount of the spray gun;
then generating a new valve opening value according to the called control model according to the NOX content information sent by the flue gas on-line monitor device; and sending the newly generated valve opening value to the electric regulating valve, and regulating the opening of the electric regulating valve to accurately control the urea spraying amount of the spray gun.
The invention relates to an intelligent control device and method for denitration urea spraying.A PLC (programmable logic controller) first receives hearth temperature information acquired by a temperature probe, calls a proper control model according to a hearth temperature region, and sets a proper electric regulating valve initial opening degree to realize primary control on the opening degree of a urea liquid electric regulating valve on a urea liquid conveying pipe; then receive the NOx content information that comes from the flue gas on-line monitoring appearance device and gather the chimney and discharge, adjust the urea liquid electric regulating valve aperture of urea liquid conveyer pipe according to NOx content information according to the control model who takes, realize the fine setting to urea liquid conveyer pipe urea liquid electric regulating valve to realize the automatic control and the regulation to the urea spraying volume of spray gun, finally realized the qualified and stable accurate automatic control to the NOx emission index of boiler flue gas.
The denitration urea spraying intelligent control device and the method thereof can realize the accurate control of the electric control valve under different temperature intervals in a rapid and efficient manner, greatly reduce the labor intensity of operators of the drivers, effectively avoid the fluctuation of the liquid spraying amount and the emission index caused by manual regulation, avoid the waste of urea solution, improve the utilization rate of the urea solution, reduce the denitration cost, reduce the environmental emission pollution simultaneously, and greatly reduce the labor intensity of the operators of the drivers.
Drawings
FIG. 1 is a control schematic diagram of an intelligent denitration urea spray control device of the invention.
Detailed Description
As shown in fig. 1, the intelligent denitration urea spray control device of the present invention includes:
the spray gun 6 is arranged in the boiler furnace 1, the spray gun 6 is communicated with the urea liquid conveying pipe 3 and the compressed air conveying pipe 4, and the urea liquid conveying pipe 3 is provided with a urea liquid electric regulating valve 8 with controllable opening;
the temperature probe 7 is used for detecting the temperature of the hearth 1;
the flue gas on-line monitor device is used for monitoring the content of waste NOx in the chimney 2;
the PLC 5 is respectively electrically connected with the urea liquid electric regulating valve 8, the temperature probe 7 and the flue gas online monitor device and is used for receiving the temperature information of the hearth 1 sent by the temperature probe 7 and receiving the NOx content information sent by the flue gas online monitor device; and generating a valve opening control value according to the temperature information of the hearth 1 and the NOx content information, sending the valve opening control value to the urea liquid electric regulating valve 8, and controlling the opening of the urea liquid electric regulating valve 8 so as to control the urea spraying amount of the spray gun 6.
The PLC 5 firstly receives temperature information of the hearth 1 acquired by the temperature probe 7, and according to the temperature of the hearth 1, a proper control model is obtained and the initial opening degree of the electric control valve is set properly, so that the primary control of the opening degree of the urea liquid electric control valve 8 on the urea liquid conveying pipe 3 is realized; then receive the NOx content information that comes from the flue gas on-line monitoring appearance device and gather the chimney and discharge, adjust urea liquid electrical control valve 8 aperture of urea liquid conveyer pipe 3 according to the control model that the NOx content information was called, realize urea liquid electrical control valve 8's fine setting on urea liquid conveyer pipe 3 to the realization is to the automatic control and the regulation of the urea spraying volume of spray gun 6, finally realized the qualified and stable accurate automatic control to the NOx emission index of boiler flue gas.
The device can high efficiency realize the accurate control of electrical control valve under the different temperature intervals, when alleviateing department stove operating personnel's intensity of labour by a wide margin, the effectual liquid injection volume that has avoided the manual regulation to lead to and the fluctuation of discharging the index, avoided urea solution's waste, improve urea solution's utilization ratio, reduce the denitration cost, reduce the environmental emission simultaneously and pollute, also alleviateing department stove operating personnel's intensity of labour simultaneously by a wide margin.
The flue gas on-line monitoring instrument device comprises a flue gas monitoring probe 12 and a flue gas on-line monitoring instrument 13, wherein the flue gas monitoring probe 12 is installed in a chimney 2, the flue gas monitoring probe 12 is electrically connected with the flue gas on-line monitoring instrument 13, the flue gas on-line monitoring instrument 13 is electrically connected with a PLC (programmable logic controller) 5, a compressed air electric regulating valve 10 is further installed on a compressed air conveying pipe 4, the PLC 5 is controlled through a computer 17, the PLC 5 firstly receives temperature information of a hearth 1 collected by a temperature probe 7, a proper control model is adjusted according to the temperature of the hearth 1, proper initial opening degrees of a urea liquid electric regulating valve 8 and a compressed air control valve 10 are set, and primary control over the opening degrees of the urea liquid electric regulating valve 8 and the compressed air control valve 10 on the urea liquid conveying pipe 3 and the compressed air conveying pipe 4 is realized; and then receiving the information of NOx content detected by a smoke monitoring probe 12 in a chimney 2 through a smoke online monitoring instrument 13, adjusting the opening of an electric urea liquid adjusting valve 8 of a urea liquid conveying pipe 3 according to the information of the NOx content according to an adjusted control model, realizing fine adjustment of the electric urea liquid adjusting valve 8 and a compressed air control valve 10 on the urea liquid conveying pipe 3 and a compressed air conveying pipe 4, simultaneously controlling the urea spraying amount of a spray gun 6 by taking compressed air as power, realizing automatic control and adjustment with more high-temperature spraying amount and less low-temperature spraying amount, and finally realizing qualified and stable accurate automatic control of NOx emission indexes of boiler smoke. Thereby can high efficiency realize the accurate control of electrical control valve under the different temperature intervals, when alleviateing department stove operating personnel's intensity of labour by a wide margin, the effectual liquid injection volume that leads to of having avoided the manual regulation and the fluctuation of discharging the index, avoided the waste of urea solution, improve the utilization ratio of urea solution, reduce the denitration cost, reduce the environmental emission simultaneously and pollute, also alleviateing department stove operating personnel's intensity of labour simultaneously by a wide margin.
In addition, a compressed air electric regulating valve 10 is also installed on the compressed air conveying pipe 4, and the PLC 5 is electrically connected with the compressed air electric regulating valve 10 and is used for receiving the temperature information of the hearth 1 sent by the temperature probe 7 and receiving the NOx content information detected by a smoke monitoring probe 12 in the chimney 2 through a smoke online monitoring instrument 13; and generating a valve opening control value of the compressed air electric regulating valve 10 according to the furnace temperature information and the NOx content information, sending the valve opening control value to the compressed air electric regulating valve 10, controlling the opening of the compressed air electric regulating valve 10, and controlling the urea spraying amount of the spray gun 6 by taking compressed air as power alone.
And according to the atomization effect of the spray gun 6, the PLC 5 adjusts the pressure of the urea liquid conveying mass pump through a frequency converter so as to control the opening degree of the urea liquid automatic control valve 8 on the urea liquid conveying pipe 3. The urea liquid pressure is stabilized and unchanged, so that the automatic control valve 8 for the urea liquid is more stable.
The compressed air control valve 10 on the compressed air delivery pipe 4 enables the atomization effect to be better under the action of the constant-pressure air inlet device or the steam power air inlet device, the upper part of flame is stirred more fully, and the purpose of better NOx reduction effect is achieved.
And the hearth 1 is communicated with a tubular dust collector 14, a bag-type dust collector 15 and an induced draft fan 16, one end of the tubular dust collector 14 is communicated with the hearth 1 through a pipeline, the other end of the tubular dust collector is communicated with the bag-type dust collector 15 through a pipeline, the bag-type dust collector 15 is communicated with the induced draft fan 16 through a pipeline, and the induced draft fan 16 is communicated with the chimney 2 through a pipeline. Further improving the stability and the qualification rate of the NOx emission of the boiler flue gas.
An intelligent control method for denitration urea spraying comprises the following steps:
the PLC 5 correspondingly stores different electric control valve opening control models according to different temperature interval ranges of the hearth 1;
when the temperature probe 7 collects the temperature of the hearth and sends the temperature information to the PLC 5, the PLC 5 receives the temperature information of the hearth 1 collected by the temperature probe 7, compares and judges the temperature range, calls a corresponding control model according to the temperature range and sets the corresponding initial opening of the electric control valve so as to preliminarily control the urea spraying amount of the spray gun;
then generating a valve opening value according to the called control model according to the NOX content information sent by the flue gas on-line monitor device; and the generated valve opening value is sent to the electric regulating valve, and the electric regulating valve is controlled to be opened according to the corresponding opening degree so as to control the urea spraying amount of the spray gun 6 and accurately control the urea spraying amount of the spray gun.
And controlling the electric regulating valve to be opened according to the corresponding opening degree so as to control the urea spraying amount of the spray gun 6, wherein the step of controlling the urea liquid electric regulating valve 8 to be opened according to the corresponding opening degree so as to control the urea spraying amount of the spray gun 6.
The control electric regulating valve is opened according to the corresponding opening degree to control the urea spraying amount of the spray gun 6, and the control electric regulating valve 10 is opened according to the corresponding opening degree to control the urea spraying amount of the spray gun 6 by taking the compressed air as power.
The control electric regulating valve is opened according to the corresponding opening degree to control the urea spraying amount of the spray gun 6, and the control electric regulating valve 8 and the compressed air electric regulating valve 10 are respectively opened according to the corresponding opening degree to control the urea spraying amount of the spray gun 6 by using the compressed air as power.
The PLC 5 is controlled through a computer 17, the PLC 5 firstly receives temperature information of the hearth 1 acquired by a temperature probe 7, and according to the temperature of the hearth 1, a proper control model is called, and proper urea liquid electric regulating valves 8 and proper compressed air control valves 10 are set for initial opening degrees, so that the initial control of the opening degrees of the urea liquid electric regulating valves 8 and the compressed air control valves 10 on the urea liquid conveying pipe 3 and the compressed air conveying pipe 4 is realized; and then receiving the information of NOx content detected by a smoke monitoring probe 12 in the chimney 2 through a smoke online monitoring instrument 13, adjusting the opening of an electric urea liquid adjusting valve 8 of a urea liquid conveying pipe 3 according to the information of the NOx content and an adjusted control model, realizing fine adjustment of the electric urea liquid adjusting valve 8 and a compressed air control valve 10 on the urea liquid conveying pipe 3 and a compressed air conveying pipe 4, and simultaneously controlling the urea spraying amount of a spray gun 6 by taking compressed air as power, wherein the high-temperature spraying amount is large, the low-temperature spraying amount is small, and finally realizing qualified and stable accurate automatic control of NOx emission indexes of boiler smoke. Thereby can high efficiency realize the accurate control of electrical control valve under the different temperature intervals, when alleviateing department stove operating personnel's intensity of labour by a wide margin, the effectual liquid injection volume that leads to of having avoided the manual regulation and the fluctuation of discharging the index, avoided the waste of urea solution, improve the utilization ratio of urea solution, reduce the denitration cost, reduce the environmental emission simultaneously and pollute, also alleviateing department stove operating personnel's intensity of labour simultaneously by a wide margin.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. The utility model provides a denitration urea spraying intelligent control device which characterized in that includes:
the spray gun (6) is arranged in the boiler furnace (1), the spray gun (6) is communicated with the urea liquid conveying pipe (3) and the compressed air conveying pipe (4), and the urea liquid conveying pipe (3) is provided with an urea liquid electric regulating valve (8) with controllable opening;
the temperature probe (7) is used for detecting the temperature of the hearth (1);
the flue gas on-line monitor device is used for monitoring the content of waste NOx in the chimney (2);
the PLC (5) is respectively and electrically connected with the urea solution electric regulating valve (8), the temperature probe (7) and the flue gas online monitor device and is used for receiving the temperature information of the hearth (1) sent by the temperature probe (7) and receiving the NOx content information sent by the flue gas online monitor device; and generating a valve opening control value according to the temperature information and the NOx content information of the hearth (1), sending the valve opening control value to the urea liquid electric regulating valve (8), and controlling the opening of the urea liquid electric regulating valve (8) so as to control the urea spraying amount of the spray gun (6).
2. The intelligent denitration urea spray control device according to claim 1, wherein a compressed air electric regulating valve (10) is further installed on the compressed air conveying pipe (4);
the PLC (5) is electrically connected with the compressed air electric regulating valve (10) and is used for receiving the temperature information of the hearth (1) sent by the temperature probe (7) and receiving the NOx content information sent by the flue gas on-line monitor device; and generating a valve opening control value of the compressed air electric control valve (10) according to the furnace temperature information and the NOx content information, sending the valve opening control value to the compressed air electric control valve (10), controlling the opening of the compressed air electric control valve (10), and controlling the urea spraying amount of the spray gun (6) by taking compressed air as power.
3. The intelligent denitration urea spray control device according to claim 2, wherein the PLC (5) is further configured to receive furnace temperature information sent by the temperature probe (7) and NOx content information sent by the flue gas on-line monitor device; and valve opening control values of the urea liquid electric regulating valve (8) and the compressed air control valve (10) are generated according to the hearth temperature information and the NOx content information, the valve opening control values are sent to the urea liquid electric regulating valve (8) and the compressed air control valve (10), the opening of the urea liquid electric regulating valve (8) and the compressed air control valve (10) is controlled, and the compressed air is used as power to control the urea spraying amount of the spray gun (6) at the same time.
4. The intelligent denitration urea spraying control device according to any one of claims 1 to 3, wherein the flue gas on-line monitor device comprises a flue gas monitoring probe (12) and a flue gas on-line monitoring instrument (13), the flue gas monitoring probe (12) is installed in the chimney (2), the flue gas monitoring probe (12) is electrically connected with the flue gas on-line monitoring instrument (13), and the flue gas on-line monitoring instrument (13) is electrically connected with the PLC (5).
5. The intelligent denitration urea spray control device according to claim 1, further comprising a computer (17) electrically connected to the PLC controller (5).
6. An intelligent denitration urea spraying control method is characterized by comprising the following steps:
the PLC (5) correspondingly stores different electric control valve opening control models according to different temperature range ranges of the hearth (1);
when the temperature probe (7) collects the temperature of the hearth and sends the temperature information to the PLC controller (5), the PLC controller (5) receives the temperature information of the hearth (1) collected by the temperature probe (7), compares and judges the temperature range, and according to the temperature range, calls a corresponding control model and sets the corresponding electric control valve initial opening degree to preliminarily control the urea spraying amount of the spray gun;
then generating a valve opening value according to the called control model according to the NOX content information sent by the flue gas on-line monitor device; and the generated valve opening value is sent to an electric regulating valve, and the electric regulating valve is controlled to be opened according to the corresponding opening degree so as to control the urea spraying amount of the spray gun (6) and accurately control the urea spraying amount of the spray gun.
7. The intelligent denitration urea spray control method according to claim 6, wherein controlling the electric control valve to open at a corresponding opening degree to control the urea spray amount of the spray gun (6) comprises controlling the urea liquid electric control valve (8) to open at a corresponding opening degree to control the urea spray amount of the spray gun (6).
8. The intelligent denitration urea spray control method according to claim 6, wherein the electric control valve is controlled to be opened according to the corresponding opening degree to control the urea spray amount of the spray gun (6), and the method further comprises the step of controlling the compressed air electric control valve (10) to be opened according to the corresponding opening degree to control the urea spray amount of the spray gun (6) by using compressed air as power.
9. The intelligent denitration urea spray control method according to claim 6, wherein the electric control valve is controlled to be opened according to the corresponding opening degree to control the urea spray amount of the spray gun (6), and the method further comprises the step of respectively controlling the urea electric control valve (8) and the compressed air electric control valve (10) to be opened according to the corresponding opening degree to control the urea spray amount of the spray gun (6) by using the compressed air as power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010257960.1A CN111203077A (en) | 2020-04-03 | 2020-04-03 | Denitration urea spray intelligent control device and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010257960.1A CN111203077A (en) | 2020-04-03 | 2020-04-03 | Denitration urea spray intelligent control device and method thereof |
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| CN111203077A true CN111203077A (en) | 2020-05-29 |
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| CN202207547U (en) * | 2011-08-22 | 2012-05-02 | 湖南安普诺环保科技有限公司 | Reducing agent spraying control device of flue gas selective non-catalytic reduction (SNCR) denitration system |
| EP2505804A2 (en) * | 2011-03-28 | 2012-10-03 | Robert Bosch GmbH | Metering system for a fluid medium, in particular urea-water solution |
| CN202569927U (en) * | 2012-05-28 | 2012-12-05 | 福建龙净环保股份有限公司 | SNCR (selective non-catalytic reduction) denitration system |
| CN105879601A (en) * | 2016-06-25 | 2016-08-24 | 南通神马线业有限公司 | Fluidized bed boiler denitration device |
| CN208839375U (en) * | 2018-09-13 | 2019-05-10 | 大连贝斯特环境工程设备有限公司 | A complete set of process equipment for SCR denitration urea pyrolysis furnace |
| CN211913295U (en) * | 2020-04-03 | 2020-11-13 | 广州市铭汉科技股份有限公司 | Denitration urea spraying intelligent control device |
-
2020
- 2020-04-03 CN CN202010257960.1A patent/CN111203077A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2505804A2 (en) * | 2011-03-28 | 2012-10-03 | Robert Bosch GmbH | Metering system for a fluid medium, in particular urea-water solution |
| CN202207547U (en) * | 2011-08-22 | 2012-05-02 | 湖南安普诺环保科技有限公司 | Reducing agent spraying control device of flue gas selective non-catalytic reduction (SNCR) denitration system |
| CN202569927U (en) * | 2012-05-28 | 2012-12-05 | 福建龙净环保股份有限公司 | SNCR (selective non-catalytic reduction) denitration system |
| CN105879601A (en) * | 2016-06-25 | 2016-08-24 | 南通神马线业有限公司 | Fluidized bed boiler denitration device |
| CN208839375U (en) * | 2018-09-13 | 2019-05-10 | 大连贝斯特环境工程设备有限公司 | A complete set of process equipment for SCR denitration urea pyrolysis furnace |
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