CN104437064A - Denitration system - Google Patents
Denitration system Download PDFInfo
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- CN104437064A CN104437064A CN201410600796.4A CN201410600796A CN104437064A CN 104437064 A CN104437064 A CN 104437064A CN 201410600796 A CN201410600796 A CN 201410600796A CN 104437064 A CN104437064 A CN 104437064A
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- urea
- stove
- dcs controller
- chimney
- material returning
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Abstract
The invention relates to the technical field of papermaking flue gas denitration and in particular relates to a denitration system. The denitration system comprises a DCS controller, a urea dissolving tank, a urea solution storage tank, a urea high-pressure pump, a urea regulation valve, a mixer, a spray gun, a return feeder and a chimney, wherein the urea dissolving tank, the urea solution storage tank, the urea high-pressure pump, the urea regulation valve, the mixer, a spray gun, the return feeder and the chimney are sequentially connected with one another; the DCS controller is respectively connected with the urea dissolving tank, the urea solution storage tank, the urea high-pressure pump and the urea regulation valve in a controlling mode; the chimney is internally provided with an oxynitride concentration detection circuit, the oxynitride concentration detection circuit is used for acquiring a concentration signal of oxynitride in flue gas of the chimney in real time and sending the concentration signal of the oxynitride in the flue gas of the chimney to the DCS controller, and the DCS controller is used for controlling the chimney to discharge the flue gas according to the concentration signal of the oxynitride in the flue gas of the chimney. The denitration system has the advantages of ideal denitration effect, high denitration efficiency, small loss in flue gas discharge of a boiler, and low production cost.
Description
Technical field
The present invention relates to the technical field of papermaking denitrating flue gas, particularly relate to a kind of denitrating system.
Background technology
In the process of paper production, can produce a large amount of flue gases, this kind of flue gas contains a large amount of oxynitrides, if these oxynitrides are discharged in air, will pollute the environment, and affect air quality, thus affect human health.Therefore, the flue gas that paper-making process produces must first just can be discharged in air through denitration.
At present, according to the discharge standard of every profession and trade flue gas, need to carry out reduction treatment to the nitrogen oxides pollution thing in flue gas.But there is the shortcoming that denitration effect is undesirable, denitration efficiency is low, boiler exhaust gas loss is large, production cost is high in denitrating system of the prior art.
Summary of the invention
The object of the invention is to provide the denitrating system that a kind of denitration effect is desirable, denitration efficiency is high, boiler exhaust gas loss is little, production cost is low for weak point of the prior art.
For achieving the above object, the present invention is achieved through the following technical solutions.
A kind of denitrating system is provided, comprises DCS controller, and comprise the urea dissolving tank, urea liquid storage tank, urea high-pressure pump, urea control valve, blender, spray gun, material returning device and the chimney that connect successively;
Described urea dissolving tank is provided with urea concentration observation circuit and dissolving tank switch valve circuit, the urea concentration signal of urea dissolving tank described in described urea concentration observation circuit Real-time Obtaining, and this urea concentration signal is sent to described DCS controller, described DCS controller controls described dissolving tank switch valve circuit according to the urea concentration signal received;
Described urea liquid storage tank is provided with storage capacity observation circuit and storage tank switch valve circuit, described storage capacity observation circuit detects the urea liquid storage capacity signal of described urea liquid storage tank in real time, and this urea liquid storage capacity signal is sent to described DCS controller, described DCS controller controls described storage tank switch valve circuit according to the urea liquid storage capacity signal received;
Described urea high-pressure pump is provided with pressure sensor, the pressure value signal of urea high-pressure pump described in described pressure sensor Real-time Obtaining, and this pressure value signal is sent to described DCS controller, described DCS controller controls described urea high-pressure pump according to this pressure value signal;
Described urea control valve is provided with control valve on-off circuit, and described DCS controller controls described control valve on-off circuit;
Oxynitride concentration testing circuit is provided with in described chimney, oxynitride concentration signal in chimney smoke described in described oxynitride concentration testing circuit Real-time Obtaining, and the oxynitride concentration signal in described chimney smoke is sent to described DCS controller, described DCS controller controls described smoke stack emission flue gas according to the oxynitride concentration signal in described chimney smoke.
Described urea dissolving tank is connected with the urea pipeline entrance for passing into urea to described urea dissolving tank, and for passing into the demineralized water entrance of demineralized water to described urea dissolving tank.
The demineralized water arm for passing into demineralized water to described blender is provided with between described demineralized water entrance and described blender.
Described demineralized water arm is provided with demineralized water control valve; Described DCS controller is electrically connected with described demineralized water control valve.
Described spray gun comprises a stove spray gun and two stove spray guns; Described material returning device comprises a stove material returning device and two stove material returning devices;
The output of described blender is connected with a described stove spray gun and described two stove spray guns respectively;
The output of a described stove spray gun is connected with a described stove material returning device; The output of described two stove spray guns is connected with described two stove material returning devices;
The output of a described stove material returning device is connected with described chimney respectively with the output of described two stove material returning devices.
A described stove spray gun and described two stove spray guns are connected with compressed air piping entrance respectively.
The input of a described stove material returning device is connected with a kiln gas entrance.
The input of described two stove material returning devices is connected with two kiln gas entrances.
Described blender is jetting type blender.
Beneficial effect of the present invention:
(1) a kind of denitrating system provided by the invention, owing to being provided with blender for passing into urea liquid in spray gun, and blender of the present invention is jetting type mixture, the common synergy of this jetting type blender and spray gun, can make this denitrating system have the advantage that denitration effect is desirable and denitration efficiency is high.
(2) a kind of denitrating system provided by the invention, owing to being provided with the demineralized water arm for passing into demineralized water to blender between demineralized water entrance and blender, demineralized water arm is provided with demineralized water control valve, and this demineralized water arm and this demineralized water control valve can improve denitration efficiency.
(3) a kind of denitrating system provided by the invention, because DCS controller is electrically connected with urea dissolving tank, urea liquid storage tank, urea high-pressure pump, urea control valve and demineralized water control valve respectively, namely can cooperation control urea dissolving tank, urea liquid storage tank, urea high-pressure pump, urea control valve and demineralized water control valve by DCS controller, thus make this denitrating system have boiler exhaust gas to lose little advantage.
(4) a kind of denitrating system provided by the invention, has the advantages that energy consumption is little, therefore, it is possible to greatly reduce production cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of denitrating system of the present invention.
Include in FIG:
1---DCS controller,
2---urea dissolving tank,
3---urea liquid storage tank,
4---urea high-pressure pump,
5---urea control valve,
6---blender,
7---chimney,
8---demineralized water control valve,
9---a stove spray gun,
10---two stove spray guns,
11---a stove material returning device,
12---two stove material returning devices,
101---urea pipeline entrance,
102---demineralized water entrance,
103---demineralized water arm,
104---compressed air piping entrance,
105---a kiln gas entrance,
106---two kiln gas entrances.
Detailed description of the invention
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Special instruction, " stove " used in the present invention and " two stoves " refer to " the first boiler " and " the second boiler " respectively.
embodiment.
See Fig. 1.A kind of denitrating system of the present embodiment, comprises DCS controller 1, and comprises the urea dissolving tank 2, urea liquid storage tank 3, urea high-pressure pump 4, urea control valve 5, blender 6, spray gun, material returning device and the chimney 7 that connect successively; Urea dissolving tank 2 is provided with urea concentration observation circuit and dissolving tank switch valve circuit, the urea concentration signal of urea concentration observation circuit Real-time Obtaining urea dissolving tank 2, and this urea concentration signal is sent to DCS controller 1, DCS controller 1 according to the urea concentration signal control dissolving tank switch valve circuit received;
Urea liquid storage tank 3 is provided with storage capacity observation circuit and storage tank switch valve circuit, storage capacity observation circuit detects the urea liquid storage capacity signal of urea liquid storage tank 3 in real time, and this urea liquid storage capacity signal is sent to DCS controller 1, DCS controller 1 according to the urea liquid storage capacity signal control storage tank switch valve circuit received;
Urea high-pressure pump 4 is provided with pressure sensor, the pressure value signal of pressure sensor Real-time Obtaining urea high-pressure pump 4, and this pressure value signal is sent to DCS controller 1, DCS controller 1 according to this pressure value signal control urea high-pressure pump 4;
Urea control valve 5 is provided with control valve on-off circuit, and DCS controller 1 controls to adjust valve control circuit;
Oxynitride concentration testing circuit is provided with in chimney 7, oxynitride concentration signal in oxynitride concentration testing circuit Real-time Obtaining chimney 7 flue gas, and the oxynitride concentration signal in chimney 7 flue gas is sent to DCS controller 1, DCS controller 1 according in chimney 7 flue gas oxynitride concentration signal control chimney 7 discharge flue gas; Thus make this denitrating system have boiler exhaust gas to lose little advantage.
Wherein, DCS controller 1 is connected with chimney 7, and detects the concentration of oxynitrides in the flue gas of chimney 7, if the concentration of oxynitrides meets national standard in the flue gas of chimney 7, is then discharged in air.
In this enforcement, urea dissolving tank 2 is connected with the urea pipeline entrance 101 for passing into urea to urea dissolving tank 2, and for passing into the demineralized water entrance 102 of demineralized water to urea dissolving tank 2.In the present embodiment, between demineralized water entrance 102 and blender 6, be provided with the demineralized water arm 103 for passing into demineralized water to blender 6.Wherein, this demineralized water arm 103 is provided with demineralized water control valve 8; DCS controller 1 is electrically connected with demineralized water control valve 8, thus can control the closedown of demineralized water control valve 8 well and open.
In the present embodiment, spray gun comprises stove spray gun 9 and two stove spray guns 10; Material returning device comprises stove material returning device 11 and two stove material returning devices 12; The output of blender 6 is connected with a stove spray gun 9 and two stove spray guns 10 respectively; The output of one stove spray gun 9 is connected with a stove material returning device 11; The output of two stove spray guns 10 is connected with two stove material returning devices 12; The output of one stove material returning device 11 is connected with chimney 7 respectively with the output of two stove material returning devices 12; Thus make the denitration efficiency of this denitrating system high.
In the present embodiment, a stove spray gun 9 and two stove spray guns 10 are connected with compressed air piping entrance 104 respectively.This compressed air piping entrance 104 for passing into compressed air toward a stove spray gun 9 and two stove spray guns 10 respectively, thus is convenient to the injection of a stove spray gun 9 and two stove spray guns 10.
In the present embodiment, the input of a stove material returning device 11 is connected with a kiln gas entrance 105.This kiln gas entrance 105 is for passing into the flue gas of the first boiler toward a stove material returning device 11.
In the present embodiment, the input of two stove material returning devices 12 is connected with two kiln gas entrances 106.This two kiln gas entrance 106 is for passing into the flue gas of the second boiler toward two stove material returning devices 12.
In the present embodiment, blender 6 is jetting type blender.This jetting type blender can make this denitrating system have the advantage that denitration effect is desirable and denitration efficiency is high.
Finally should be noted that; above embodiment is only for illustration of technical scheme of the present invention but not limiting the scope of the invention; although be explained in detail the present invention with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to technical scheme of the present invention or equivalent replacement, and not depart from essence and the scope of technical solution of the present invention.
Claims (9)
1. a denitrating system, is characterized in that: comprise DCS controller, and comprises the urea dissolving tank, urea liquid storage tank, urea high-pressure pump, urea control valve, blender, spray gun, material returning device and the chimney that connect successively;
Described urea dissolving tank is provided with urea concentration observation circuit and dissolving tank switch valve circuit, the urea concentration signal of urea dissolving tank described in described urea concentration observation circuit Real-time Obtaining, and this urea concentration signal is sent to described DCS controller, described DCS controller controls described dissolving tank switch valve circuit according to the urea concentration signal received;
Described urea liquid storage tank is provided with storage capacity observation circuit and storage tank switch valve circuit, described storage capacity observation circuit detects the urea liquid storage capacity signal of described urea liquid storage tank in real time, and this urea liquid storage capacity signal is sent to described DCS controller, described DCS controller controls described storage tank switch valve circuit according to the urea liquid storage capacity signal received;
Described urea high-pressure pump is provided with pressure sensor, the pressure value signal of urea high-pressure pump described in described pressure sensor Real-time Obtaining, and this pressure value signal is sent to described DCS controller, described DCS controller controls described urea high-pressure pump according to this pressure value signal;
Described urea control valve is provided with control valve on-off circuit, and described DCS controller controls described control valve on-off circuit;
Oxynitride concentration testing circuit is provided with in described chimney, oxynitride concentration signal in chimney smoke described in described oxynitride concentration testing circuit Real-time Obtaining, and the oxynitride concentration signal in described chimney smoke is sent to described DCS controller, described DCS controller controls described smoke stack emission flue gas according to the oxynitride concentration signal in described chimney smoke.
2. a kind of denitrating system according to claim 1, it is characterized in that: described urea dissolving tank is connected with the urea pipeline entrance for passing into urea to described urea dissolving tank, and for passing into the demineralized water entrance of demineralized water to described urea dissolving tank.
3. a kind of denitrating system according to claim 2, is characterized in that: be provided with the demineralized water arm for passing into demineralized water to described blender between described demineralized water entrance and described blender.
4. a kind of denitrating system according to claim 3, is characterized in that: described demineralized water arm is provided with demineralized water control valve; Described DCS controller is electrically connected with described demineralized water control valve.
5. a kind of denitrating system according to claim 1, is characterized in that: described spray gun comprises a stove spray gun and two stove spray guns; Described material returning device comprises a stove material returning device and two stove material returning devices;
The output of described blender is connected with a described stove spray gun and described two stove spray guns respectively;
The output of a described stove spray gun is connected with a described stove material returning device; The output of described two stove spray guns is connected with described two stove material returning devices;
The output of a described stove material returning device is connected with described chimney respectively with the output of described two stove material returning devices.
6. a kind of denitrating system according to claim 5, is characterized in that: a described stove spray gun and described two stove spray guns are connected with compressed air piping entrance respectively.
7. a kind of denitrating system according to claim 5, is characterized in that: the input of a described stove material returning device is connected with a kiln gas entrance.
8. a kind of denitrating system according to claim 5, is characterized in that: the input of described two stove material returning devices is connected with two kiln gas entrances.
9. a kind of denitrating system according to claim 1, is characterized in that: described blender is jetting type blender.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410600796.4A CN104437064B (en) | 2014-10-31 | 2014-10-31 | Denitration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410600796.4A CN104437064B (en) | 2014-10-31 | 2014-10-31 | Denitration system |
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| Publication Number | Publication Date |
|---|---|
| CN104437064A true CN104437064A (en) | 2015-03-25 |
| CN104437064B CN104437064B (en) | 2017-01-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410600796.4A Active CN104437064B (en) | 2014-10-31 | 2014-10-31 | Denitration system |
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| Country | Link |
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| CN (1) | CN104437064B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106292270A (en) * | 2016-09-09 | 2017-01-04 | 淮南矿业(集团)有限责任公司 | A kind of CFBB denitration automaton and method thereof |
| CN114870625A (en) * | 2022-03-04 | 2022-08-09 | 华电电力科学研究院有限公司 | Urea solution preparation system and method for urea ammonia production device |
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| CN202921161U (en) * | 2012-11-30 | 2013-05-08 | 湘潭保利光电测控科技有限公司 | Cement kiln flue gas SNCR (selective non-catalytic reduction) denitration system |
| CN203342646U (en) * | 2013-06-07 | 2013-12-18 | 大连贝斯特环境工程设备有限公司 | Fluidized bed boiler flue gas denitrating device adopting urea hydrolysis SNCR (selective non-catalytic reduction) |
| CN204193772U (en) * | 2014-10-31 | 2015-03-11 | 东莞理文造纸厂有限公司 | A kind of denitrating system |
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2014
- 2014-10-31 CN CN201410600796.4A patent/CN104437064B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202921161U (en) * | 2012-11-30 | 2013-05-08 | 湘潭保利光电测控科技有限公司 | Cement kiln flue gas SNCR (selective non-catalytic reduction) denitration system |
| CN203342646U (en) * | 2013-06-07 | 2013-12-18 | 大连贝斯特环境工程设备有限公司 | Fluidized bed boiler flue gas denitrating device adopting urea hydrolysis SNCR (selective non-catalytic reduction) |
| CN204193772U (en) * | 2014-10-31 | 2015-03-11 | 东莞理文造纸厂有限公司 | A kind of denitrating system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106292270A (en) * | 2016-09-09 | 2017-01-04 | 淮南矿业(集团)有限责任公司 | A kind of CFBB denitration automaton and method thereof |
| CN106292270B (en) * | 2016-09-09 | 2019-03-19 | 淮南矿业(集团)有限责任公司 | A kind of circulating fluidized bed boiler denitration automatic control device and its method |
| CN114870625A (en) * | 2022-03-04 | 2022-08-09 | 华电电力科学研究院有限公司 | Urea solution preparation system and method for urea ammonia production device |
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| CN104437064B (en) | 2017-01-11 |
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