CN202527057U - Nitrogen oxide waste gas treatment equipment - Google Patents
Nitrogen oxide waste gas treatment equipment Download PDFInfo
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- CN202527057U CN202527057U CN2012200673120U CN201220067312U CN202527057U CN 202527057 U CN202527057 U CN 202527057U CN 2012200673120 U CN2012200673120 U CN 2012200673120U CN 201220067312 U CN201220067312 U CN 201220067312U CN 202527057 U CN202527057 U CN 202527057U
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Abstract
The utility model discloses nitrogen oxide waste gas treatment equipment, which comprises a first-stage washing tower, a fan, a chimney and a connecting pipeline, wherein the inner top of the first-stage washing tower is provided with a spraying structure and a defogging layer positioned below the spraying structure; the bottom of the first-stage washing tower is provided with a circulating water groove; an exhausting opening is connected with the fan through a pipeline; and the outlet of the fan is connected with the chimney. The nitrogen oxide waste gas treatment equipment is characterized in that: a second-stage washing tower is connected in series between a first-stage exhaust opening and the fan; the middle part of the second-stage washing tower is provided with a second-stage air inlet; the top of the second-stage washing tower is provided with a second-stage exhaust opening; the second-stage air inlet is connected with the first-stage exhaust opening; the second-stage exhaust opening is connected with the fan; and a second-stage liquid outlet at the bottom of the second-stage washing tower is connected to a neutralizing groove through a pipeline and the first-stage exhaust opening. According to the nitrogen oxide waste gas treatment equipment, gas output by the first-stage washing tower is further washed by using a serial second-stage washing tower, so that the nitric oxide concentration in the gas is lowered, and exhaust emissions are accordant with the national emission standard.
Description
Technical field
The utility model relates to a kind of waste gas treatment equipment, is specifically related to a kind of nitrous oxides exhaust gas treatment facility.
Background technology
To the purified treatment of nitrous oxides exhaust gas, three kinds of processes are arranged: catalytic reduction method, absorption method and absorption process.Wherein, adsorption method needs processing because the regenerative process of adsorbent still produces nitrogen oxide, seldom adopts, and perhaps only is used for the exhaust-gas treatment that exhausted air quantity is little, nitrogen-containing oxide is very low; Catalytic reduction method is because of investment is big, operating cost is high, safeguard that more catalyst changeout and catalyst carrier material expense thereof are higher; The catalytic reaction temperature is at 200 ℃～400 ℃ simultaneously; Need to be equipped with thermal source and keep catalytic temperature, so this method is mainly used in continuously, the waste gas system of high concentration discharging nitrogen-containing oxide.Comparatively speaking, absorption process is a method the most commonly used in three kinds of methods, adopts liquid-absorbant to remove one or more gas components in the waste gas, and therefore, it is the necessary condition of this method that the gas component that is removed can be dissolved in the absorption liquid.The wet absorption method is lower, easy to operate because of investment, can be used for purified treatment continuous or gap discharging nitrous oxides exhaust gas, receives the favor of vast enterprise.
In the prior art, nitrous oxides exhaust gas makes the acid mist in the gas be washed absorption through the spray of scrubbing tower neutral and alkali solution, and reduction is converted into the nitrogen G&W, then is thrown in the atmosphere.Yet; Behind once washing, because the oxidizability in the nitrogen oxide is on the low side, promptly nitric oxide production ratio is too high; Make that finally the rate of removing of nitrogen oxides of exhaust gas is lower; Can not reach the first discharge standard in " discharge standard of air pollutants ", therefore, need improve existing treatment facility structure.
Summary of the invention
The utility model purpose provides a kind of nitrous oxides exhaust gas treatment facility, through the improvement to equipment, emission gases is up to state standards, and reduces the concentration of nitrogen oxide in the emission gases, improves the equipment clean rate.
For achieving the above object, the technical scheme that the utility model adopts is: a kind of nitrous oxides exhaust gas treatment facility comprises one-level scrubbing tower, blower fan, chimney and connecting line; Said one-level scrubbing tower inner top is provided with spray structure and is positioned at the demist layer of spray structure below, and the bottom is provided with circulating water chennel, and the sidewall at the corresponding circulating water chennel of said one-level scrubbing tower place is provided with the one-level leakage fluid dram; The tower body middle part is provided with the one-level air inlet; The tower body top is provided with the one-level exhaust outlet, and said exhaust outlet is connected with said blower fan by the road, and this blower fan outlet is connected with said chimney; Be connected in series a secondary scrubbing tower between said one-level exhaust outlet and the blower fan; Said secondary scrubbing tower middle part is provided with the secondary air inlet, and the top is provided with the secondary exhaust outlet, and said secondary air inlet is connected with said one-level exhaust outlet; Said secondary exhaust outlet is connected with said blower fan, and the secondary leakage fluid dram of said secondary wash tower bottoms is by the road with said one-level leakage fluid dram and insert in the neutralization chamber.
In the technique scheme; Be respectively equipped with a soda acid detector and a pharmacy slot in said one-level, the secondary scrubbing tower; Each said pharmacy slot connects with corresponding scrubbing tower through dosing pipe; Said dosing pipe is provided with the medicament valve, and the signal output part of said soda acid detector is connected with the PLC controller, and the control end of said PLC controller is connected with each said medicament valve control end.
In the technique scheme; Be provided with the running water transfer pipeline; This running water transfer pipeline is connected with the secondary scrubbing tower with said one-level scrubbing tower respectively; Said running water transfer pipeline is provided with and is respectively equipped with one-level control valve and secondary control valve, and the control end of said one-level control valve and secondary control valve is connected with the PLC controller.
In the technique scheme, said one-level leakage fluid dram is connected with corresponding said spray structure with the circulation line of secondary leakage fluid dram through correspondence, and said circulation line is provided with circulating pump; On the said circulation line and be connected to drain line, said drain line is connected with said neutralization chamber, and said drain line is provided with tapping valve, and the control end of this tapping valve is connected with the PLC controller.
In the technique scheme, be provided with liquid level gauge in the said circulating water chennel, the signal output part of this liquid level gauge is connected with the PLC controller.
The utility model operation principle: nitrous oxides exhaust gas is through one-level air inlet input one-level scrubbing tower; Be provided with alkaline solution in the one-level circulating water chennel in the one-level scrubbing tower, by circulating pump alkaline solution be delivered to the spray structure place, spray structure sprays alkaline solution downwards; With the waste gas reaction that gets in the one-level scrubbing tower; Reduction part nitrogen oxide, this gas rise and behind the demist layer, are exported by the exhaust outlet at one-level scrubbing tower top, get into the secondary scrubbing tower by the road; And the liquid after the reaction neutralization falls in the circulating water chennel of bottom, waits for that be recycled the pump extraction uses next time; Get into the gas alkaline solution washing of spray structure ejection in the secondary scrubbing tower once more of secondary scrubbing tower, the gas after the reduction is discharged from the secondary exhaust outlet at top, is blown out by blower fan through output pipe, from smoke stack emission.When the soda acid detector in the circulating water chennel records the alkaline solution pH value and does not reach rated value, send a signal to the PLC controller, the PLC controller drives tapping valve and opens; Effluent discharge is opened the medicament valve simultaneously to neutralization chamber, adds an amount of alkaline stoste; By tap water pipe line the dilution water source is provided; According to soda acid detector detectable concentration data, the keying of first, second control valve of PLC controller control guarantees that the concentration of firsts and seconds scrubbing tower internal reaction solution meets the requirements.
Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:
1, the secondary scrubbing tower because the utility model is connected behind the one-level scrubbing tower; Carry out the secondary washing tower, with the gas secondary response of exporting in the one-level scrubbing tower, through the difference of question response gas ingredients in one-level, the secondary scrubbing tower; Adopt different alkaline solutions with it anyway; Remove the concentration of nitrogen oxides of exhaust gas, make its allow compliance with emission standards, reduce pollution environment;
2, adopt circulating pump that the solution in the circulating water chennel is delivered to the spray structure place; Use repeatedly,, send the pH value data in real time to the PLC controller by the online detection of soda acid detector; Control the keying of tapping valve, medicament valve and control valve according to the acid-base value in the circulating water chennel by the PLC controller; Reaction solution in the circulating water chennel is met the requirements, guaranteed efficient absorption, reduce the discharging of nitrogen oxide acid in the waste gas;
3, whole system is controlled by the PLC controller automatically, controls conveniently, guarantees the equipment security of operation, and convenient management is flexible.
Description of drawings
Fig. 1 is that the pipeline of the utility model embodiment one connects schematic block diagram.
Wherein: 1, one-level scrubbing tower; 2, blower fan; 3, chimney; 4, spray structure; 5, demist layer; 6, circulating water chennel; 7, one-level leakage fluid dram; 8, one-level air inlet; 9, one-level exhaust outlet; 10, secondary scrubbing tower; 11, secondary air inlet; 12, secondary exhaust outlet; 13, secondary leakage fluid dram; 14, neutralization chamber; 15, tapping valve; 16, circulation line; 17, circulating pump; 18, liquid level gauge; 19, soda acid detector; 20, one-level scrubbing tower pharmacy slot; 21, medicament valve; 22, one-level control valve; 23, secondary control valve; 24, secondary scrubbing tower pharmacy slot.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Embodiment one: referring to shown in Figure 1, a kind of nitrous oxides exhaust gas treatment facility comprises one-level scrubbing tower 1, blower fan 2, chimney 3, PLC controller and connecting line; Said one-level scrubbing tower 1 inner top is provided with spray structure 4 and is positioned at the demist layer 5 of spray structure 4 belows, and the bottom is provided with circulating water chennel 6, and the sidewall at said one-level scrubbing tower 1 corresponding circulating water chennel 6 places is provided with one-level leakage fluid dram 7; The tower body middle part is provided with one-level air inlet 8; The tower body top is provided with one-level exhaust outlet 9, and said one-level exhaust outlet 9 is connected with said blower fan 2 by the road, and these blower fan 2 outlets are connected with said chimney 3; Be connected in series a secondary scrubbing tower 10 between said one-level exhaust outlet 9 and the blower fan 2; Said secondary scrubbing tower 10 middle parts are provided with secondary air inlet 11, and the top is provided with secondary exhaust outlet 12, and said secondary air inlet 11 is connected with said one-level exhaust outlet 9; Said secondary exhaust outlet 12 is connected with said blower fan 2; The secondary leakage fluid dram 13 of said secondary scrubbing tower 10 bottoms is through drain line and said one-level leakage fluid dram 7 and insert in the neutralization chamber 14, and said drain line is provided with tapping valve 15, and the control end of this tapping valve 15 is connected with the PLC controller; On the said drain line and connect a circulation line 16, said one-level leakage fluid dram 7 is connected with corresponding said spray structure 4 through corresponding circulation line 16 with secondary leakage fluid dram 13, and said circulation line 16 is provided with circulating pump 17; Be provided with liquid level gauge 18 in each said circulating water chennel 6; The signal output part of said liquid level gauge 18 is connected with the PLC controller; When the water level overrate in the circulating water chennel 6, liquid level gauge 18 sends a signal on the PLC controller, is driven by the PLC controller and opens corresponding tapping valve 15; The discharge section waste liquid avoids reaction solution to overflow.
As shown in Figure 1; Be respectively equipped with a soda acid detector 19 and a pharmacy slot in said one-level, the secondary scrubbing tower; Each said pharmacy slot connects with corresponding scrubbing tower through dosing pipe; Said dosing pipe is provided with medicament valve 21, and the signal output part of said soda acid detector 19 is connected with the PLC controller, and the control end of said PLC controller is connected with each said medicament valve 21 control end.Also be provided with the running water transfer pipeline; This running water transfer pipeline is connected with secondary scrubbing tower 10 with said one-level scrubbing tower 1 respectively; Said running water transfer pipeline is provided with and is respectively equipped with one-level control valve 22 and secondary control valve 23, and the control end of said one-level control valve 22 and secondary control valve 23 is connected with the PLC controller.
In the present embodiment, solution is NaHSO in the one-level scrubbing tower pharmacy slot 20
3, solution is NaOH, NaCLO in the secondary scrubbing tower pharmacy slot 24, and waste gas is the mist of NOx-1, NOx-2, and mixed proportion is 1: 3, and treating capacity is: NOx=2000mg/m
3, 100m
3/ min, 6hr/day, 22day/mon.Concrete processing procedure is: waste gas is provided with NaHSO through one-level air inlet 8 input one-level scrubbing towers 1 in the circulating water chennel 6 in the one-level scrubbing tower 1
3Alkaline solution is delivered to spray structure 4 places by circulating pump 17 with alkaline solution, and spray structure 4 sprays alkaline solution downwards; With the waste gas reaction that gets in the one-level scrubbing tower 1, the acid mist of absorbing waste gas, reduction part nitrogen oxide; Reacted solution falls in the circulating water chennel 6 of bottom; Deliver to spray structure 4 places by circulating pump 17, spray once more, and the rising of reacted gas is exported by the one-level exhaust outlet 9 at one-level scrubbing tower 1 top behind the demist layer; The demist layer 5 at this place is the multiaspect hollow ball, can remove the above water smoke efficient of 10micron more than 90%; The gas of output gets into secondary scrubbing tower 10 by the road; The NaOH of spray structure ejection, the washing of NaCLO alkaline solution in secondary scrubbing tower 10 once more after secondary air inlet 11 gets into; Gas after the reduction is discharged from the secondary exhaust outlet at top 12, through output pipe by blower fan 2 (7200m
3/ hr300mmAq) blow out, from 3 dischargings of 15 meters high chimneys.
When the soda acid detector 19 in one-level or the secondary scrubbing tower circulating water chennel 6 records the alkaline solution pH value and does not reach rated value, send a signal to the PLC controller, the PLC controller drives corresponding tapping valve 15 and opens; Effluent discharge to neutralization chamber 14; Open the medicament valve simultaneously, add an amount of alkaline stoste, the dilution water source is provided by tap water pipe line; According to soda acid detector 19 detectable concentration data; The PLC controller is controlled the keying of corresponding control valve, guarantees that the concentration of firsts and seconds scrubbing tower internal reaction solution meets the requirements, and reaction is normally carried out.
Claims (5)
1. a nitrous oxides exhaust gas treatment facility comprises one-level scrubbing tower, blower fan, chimney and connecting line, and said one-level scrubbing tower inner top is provided with spray structure and is positioned at the demist layer of spray structure below; The bottom is provided with circulating water chennel; The sidewall at the corresponding circulating water chennel of said one-level scrubbing tower place is provided with the one-level leakage fluid dram, and the tower body middle part is provided with the one-level air inlet, and the tower body top is provided with the one-level exhaust outlet; Said exhaust outlet is connected with said blower fan by the road; The outlet of this blower fan is connected with said chimney, it is characterized in that: be connected in series a secondary scrubbing tower between said one-level exhaust outlet and the blower fan, be provided with the secondary air inlet in the middle part of the said secondary scrubbing tower; The top is provided with the secondary exhaust outlet; Said secondary air inlet is connected with said one-level exhaust outlet, and said secondary exhaust outlet is connected with said blower fan, and the secondary leakage fluid dram of said secondary wash tower bottoms is by the road with said one-level leakage fluid dram and insert in the neutralization chamber.
2. nitrous oxides exhaust gas treatment facility according to claim 1; It is characterized in that: be respectively equipped with a soda acid detector and a pharmacy slot in said one-level, the secondary scrubbing tower; Each said pharmacy slot connects with corresponding scrubbing tower through dosing pipe; Said dosing pipe is provided with the medicament valve, and the signal output part of said soda acid detector is connected with the PLC controller, and the control end of said PLC controller is connected with each said medicament valve control end.
3. nitrous oxides exhaust gas treatment facility according to claim 1 and 2; It is characterized in that: also be provided with the running water transfer pipeline; This running water transfer pipeline is connected with the secondary scrubbing tower with said one-level scrubbing tower respectively; Said running water transfer pipeline is provided with and is respectively equipped with one-level control valve and secondary control valve, and the control end of said one-level control valve and secondary control valve is connected with the PLC controller.
4. nitrous oxides exhaust gas treatment facility according to claim 1 is characterized in that: said one-level leakage fluid dram is connected with corresponding said spray structure with the circulation line of secondary leakage fluid dram through correspondence, and said circulation line is provided with circulating pump; On the said circulation line and be connected to drain line, said drain line is connected with said neutralization chamber, and said drain line is provided with tapping valve, and the control end of this tapping valve is connected with the PLC controller.
5. nitrous oxides exhaust gas treatment facility according to claim 1 is characterized in that: be provided with liquid level gauge in the said circulating water chennel, the signal output part of this liquid level gauge is connected with the PLC controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200673120U CN202527057U (en) | 2012-02-28 | 2012-02-28 | Nitrogen oxide waste gas treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200673120U CN202527057U (en) | 2012-02-28 | 2012-02-28 | Nitrogen oxide waste gas treatment equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202527057U true CN202527057U (en) | 2012-11-14 |
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ID=47128265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200673120U Expired - Fee Related CN202527057U (en) | 2012-02-28 | 2012-02-28 | Nitrogen oxide waste gas treatment equipment |
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| Country | Link |
|---|---|
| CN (1) | CN202527057U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112905A (en) * | 2013-02-22 | 2013-05-22 | 赫东波 | Circulation tank pump sealing water recycling device in nickel oxide preparation equipment |
| CN110776963A (en) * | 2019-11-07 | 2020-02-11 | 同济大学 | Waste pyrolysis gas purification device and method |
-
2012
- 2012-02-28 CN CN2012200673120U patent/CN202527057U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112905A (en) * | 2013-02-22 | 2013-05-22 | 赫东波 | Circulation tank pump sealing water recycling device in nickel oxide preparation equipment |
| CN110776963A (en) * | 2019-11-07 | 2020-02-11 | 同济大学 | Waste pyrolysis gas purification device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20150228 |
|
| EXPY | Termination of patent right or utility model |