CN205216550U - High -efficient semidry method desulfurizing tower and desulfurization system based on dynamic response district - Google Patents
High -efficient semidry method desulfurizing tower and desulfurization system based on dynamic response district Download PDFInfo
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- CN205216550U CN205216550U CN201520620473.1U CN201520620473U CN205216550U CN 205216550 U CN205216550 U CN 205216550U CN 201520620473 U CN201520620473 U CN 201520620473U CN 205216550 U CN205216550 U CN 205216550U
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Abstract
The utility model provides a high -efficient semidry method desulfurizing tower and desulfurization system based on dynamic response district, capital equipment are desulfurizing tower, sack cleaner and draught fan, above -mentioned dynamic adjustment's mode is adopted in the design of desulfurizing tower internal reaction section, according to logging in's the flue gas condition, carries out the regulation of corresponding temperature, humidity and circulation ash concentration at the conversion zone. The pending flue gas that will contain pollutant SO2, dust and NOX passes through the desulfurizing tower in proper order, the sack cleaner, then keep the operation of system negative pressure through the draught fan, and realize the minimum discharge to sulfur dioxide and dust, the while still has 10 percent~50 percent denitrification effect.
Description
Technical field
The utility model relates to a kind of semidry process desulfurizer based on dynamic response district, belongs to field of environment engineering.
Background technology
The Target of Total Pollutant Amount Control of sulfur dioxide has been worked out in Chinese Ministry of Environmental Protection " 12 " planning, and by 2015, the total emission volumn of sulfur dioxide will reduce 10% than 2010.This is a severeer task.Field is administered for current flue gas desulfurization, because various wet desulfurizing process all needs the certain waste water of quantitative outer row to ensure the ionic equilibrium of desulphurization system, and need the waste component of discharge extremely complicated, intractability is very big, desulfuration waste water treatment process supporting at present just processes the suspension in waste water and part heavy metal ion substantially, the treating method not good to other complicated ions inside waste water, the solution that the chlorion of the high concentration especially contained by waste water is not good, therefore the waste water after process has no idea to carry out reuse, substantially be used as pressure dirt to use.And semi-dry desulfurizing process is because of without the need to discharge of wastewater, therefore receive and pay close attention to widely, but existing several semi-dry desulfurizing process has certain limitation, be mainly reflected in that desulfuration efficiency is not high but energy consumption is higher, which greatly limits the application prospect of semi-dry desulfurizing process.
At present, the semi-dry method flue gas desulfurization technique applied both at home and abroad mainly contains Circulating Fluidized Bed Process, rotating spraying technique (SDA), Novel integrated metallization processes (NID) and dense flow absorber technique these four kinds.Recirculating fluidized bed and Novel integrated metallization processes are owing to adopting the mode of lower air inlet, and its SR is greater than the SR of dense flow absorber technique, and these three kinds of sulfur removal technologies all require at 600 ~ 1000g/m
3circulating ash concentration and 4 ~ 8s the time of staying under carry out desulphurization reaction, just can reach the expection desulfurized effect of desulfurization designing requirement, therefore more fixing in tower type design, the circulating ash quantity of system also tends to stable.Rotating spraying technique adopts the pattern of whitewashing, slightly distinguishes, be only applicable to sulfur content≤600 ㎎/Nm with other three kinds of techniques
3sulfur-containing smoke gas process.Although this several technique can reach higher desulfuration efficiency by design optimization, but the energy consumption of system can increase greatly, simultaneously because the restriction of semidry method reaction principle, the tower inner transmission matter efficiency of this several semidry process is lower, partial desulfurization reaction occurs in the sack cleaner at rear portion, and this also creates certain impact to the service life of filter bag.
CN102631821A discloses a kind of method of semidry method and wet method coordinated desulfurization, although can realize deep desulfuration, due to the application of the spray woods of wet desulphurization, adds system energy consumption, also there is discharge of wastewater problem simultaneously, is also accompanied with the discharge of solvent;
CN102716658 discloses a kind of forward type semi-dry desulphurization system, by arranging sprinkling desulfurizing agent, and in desulfurizing tower, arranges import bend loss, venturi pipeline section, the section of rising.Bye-pass connects activated carbon system, and design is complicated, and energy consumption is also higher;
CN103349903A, CN103480268A disclose a kind of method of flue gas semi-dry desulphurization, wherein need to carry out desulfurization after damping to flue gas, are also to make use of hygrometric state powder to live slurry desulfurization;
CN103566749A discloses a kind of circulating fluid-bed semi-dry desulphurization system, civilian mound li pipe is installed in desulfurizing tower, storage ash bucket and smoke reflux device are installed, utilize neat stress reflux cycle control loop, ensure that desulfurizing tower flow field is stablized, bed is even, but dynamic realtime cannot be realized only by controlled circulations such as control pressure reduction to control, waste energy consumption huge, the cycle is long, is unfavorable for that desulphurization system adjusts simultaneously;
CN202478821U discloses a kind of dry desulfurizing tower strengthening reflux of recirculating fluidized bed, and desulfurizing tower inner top is provided with the baffle liner surrounded by some pieces of deflectors.This utility model arranges the baffle liner formed a circle by some pieces of deflectors by the top in desulfurizing tower, flue gas is risen to and forms strong inverse flow afterwards herein, further enhance that tower is endocorpuscular to be returned, although enhance mass transfer, but still cannot control by formative dynamics, adjustment expends excessive cycle.
CN102500225A discloses a kind of sulfur removal technology, although to desulfurizing tower, circulation technology room is all improved, and in desulfurizing tower, does not realize dynamic adjustments, is unfavorable for calculating in real time and adjusting at any time, and Expenses Cost and time, energy consumption is excessive.
Therefore, how to solve the problems referred to above that in prior art, semi-dry desulfurizing process faces, being realize technology barrier that is efficient, green, environmental protection, is also technical problem urgently to be resolved hurrily at present.
Utility model content
For above-mentioned semi-dry desulfurizing process produced problem, the utility model relates to a kind of semidry process desulfurizer based on dynamic response district, comprise the flue gas containing pollutant SO2, dust and NOX through the desulfurizing tower with dynamic adjustments function, in desulfurizing tower, main reaction region and regulatory region and desulfurizing agent lime react, desulfurization task is completed with both economical operating cost, the minimum discharge to sulfur dioxide and dust can be realized, also there is certain denitration effect simultaneously, when adding oxidant and activator in adjustment solution, denitration efficiency obviously increases.
The purpose of this utility model is to provide a kind of efficient semi-dry desulphurization tower based on dynamic response district, comprises gas approach, commutating zone, dynamic adjustments district, main reaction region, reaction regulatory region, current-sharing district successively; Described dynamic adjustments district is provided with dynamic adjustments module; Described reaction regulatory region is provided with reaction adjustment module; Wherein, described gas approach is positioned at the side on described commutating zone top, and described commutating zone is positioned at the topmost of desulfurizing tower, sets gradually described dynamic adjustments district, described main reaction region, described reaction regulatory region, described current-sharing district downwards; The side of bottom, described current-sharing district is provided with exhanst gas outlet.
Preferably, described dynamic adjustments module comprise hydrojet module, module of whitewashing, any one and any combination of spraying in grey module.
The utility model also relates to a kind of efficient semi-dry desulphurization system based on dynamic response district further, comprising: the input of desulfurizing tower, exhanst gas outlet, sack cleaner, flowmeter, control valve, solution pump, liquor box, air accumulator, root valve, check-valves, desulfurizing tower surge bunker, circulating ash constant feeder, circulating ash feed-line, conveying equipment, defeated grey tank car, computing module; Described desulfurizing tower comprises gas approach, commutating zone, dynamic adjustments district, main reaction region, reaction regulatory region, current-sharing district successively; Described dynamic adjustments district is provided with dynamic adjustments module; Described reaction regulatory region is provided with reaction adjustment module; Described current-sharing district is connected with described sack cleaner by described exhanst gas outlet; Described conveying equipment is arranged at described sack cleaner bottom, and two ends connect defeated grey tank car, circulating ash feed-line respectively; Described circulating ash feed-line connects desulfurizing tower input surge bunker; Described circulating ash constant feeder is arranged between described desulfurizing tower input surge bunker bottom and the top of desulfurizing tower;
The output pipeline of described air accumulator is connected to tee pipe fitting by root valve, check-valves, valve successively, and 2 ports of tee pipe fitting connect described trend adjustment module, reaction adjustment module respectively;
The output pipeline of described liquor box is connected to another tee pipe fitting by solution pump, control valve, flowmeter successively, and 2 ports of tee pipe fitting connect described dynamic adjustments module, reaction adjustment module respectively; CEMS data are from computing module input, by the control of PLC module realization to control valve.
Desulfurizing tower described in the utility model with a kind of reaction zone can the desulfurizing tower of dynamic adjustments for capital equipment, sack cleaner is set after desulfurizing tower as auxiliary equipment, carrys out keeping system by air-introduced machine and run at subnormal ambient.The dynamic adjustments module of desulfurizing tower is mainly realized with the two-fluid spray gun protecting air-blowing to sweep by one; the winding-up flow of this spray gun can regulate in real time automatically; regulated quantity detects data according to desulphurization system import CEMS; then by feeding back to electric control valve or the frequency conversion equipment of spray gun front portion after robot control system(RCS) computing module accurate Calculation, the Dynamic Regulating Process in desulfurizing tower is completed thus.The reaction adjustment module of desulfurizing tower is also realized by the spray gun of similar designs, mainly regulates reaction zone to cause because local evaporation is too fast smoke reaction district aqueous water or amount of solution to reduce, causes flue gas short circuit, and even the situation that desulfurizing tower efficiency declines.Dynamic adjustments, as the main regulating measure of reaction zone, can automatically be carried out gun traffic change according to the change of inlet flue gas composition and regulate, with the dynamic change in this realization response district; Reaction regulates the means of supplementing out economy as dynamic adjustments, effectively can increase the height of conversion zone, extends effective reaction time, ensures the desulfurizing tower efficiency of design.
The capital equipment of device described in the utility model is desulfurizing tower, sack cleaner and air-introduced machine, in described desulfurizing tower, conversion zone design adopts the mode of above-mentioned dynamic adjustments, according to the smoke condition of the system of entering, carry out the adjustment of corresponding temperature, humidity and circulating ash concentration at conversion zone.Wherein, desulfurizing tower interior reaction temperature controls at 60 ~ 140 DEG C, is preferably 70 ~ 110 DEG C, most preferably is 75 ~ 90 DEG C; Humidity regulation is as the criterion with humidity of flue gas, general control 5% ~ 18%, preferably 8% ~ 15%, most preferably 10% ~ 12%; Circulating ash concentration controls relevant with inlet flue gas sulfur content, when inlet flue gas sulfur content is 2000 ~ 2500 ㎎/Nm
3time, reaction zone circulating ash concentration controls at 200 ~ 800 ㎎/Nm
3, preferably 200 ~ 600 ㎎/Nm
3, most preferably 300 ~ 500 ㎎/Nm
3.
The process flow diagram of the utility model plant running is as follows:
The desulfurizing tower flexible design of device described in the utility model, in tower, reaction condition design can regulate according to actual smoke components, turriform can be designed to circle, also rectangle can be arranged to, the patten's design that in desulfurizing tower, flue gas flow direction is given vent to anger under also can adopting upper air respectively and lower air inlet is given vent to anger, flue gas contacts with the mixing of circulating ash also can adopt reverse-flow or parallel type, but for reducing desulphurization system operating power consumption, the utility model adopts parallel type.
Preferably, described in the utility modelly a kind ofly based on the operation process in the efficient semidry process desulfurizer in dynamic response district be, will containing pollutant SO
2, dust and NO
xpending flue gas successively through desulfurizing tower, sack cleaner, then by air-introduced machine keeping system negative pressure run, realize the minimum discharge to sulfur dioxide and dust, also there is 10% ~ 50% denitration effect simultaneously.
Preferably, described desulfurizing tower is inner by arranging commutating zone (2), dynamic adjustments district (3), main reaction region (4), reacting the dynamic adjustments that reaction condition is carried out in regulatory region (5) and current-sharing district (6) these five regions; Described pending flue gas carries out desulphurization reaction with desulfurizing agent lime in the main reaction region (4) of described desulfurizing tower and reaction regulatory region (5), and the intake method of described desulfurizing tower adopts upper air or lower air inlet.
Preferably, in rectification (2) district of described desulfurizing tower, flue gas mainly completes circulating ash concentration adjustment, and the deflector simultaneously by arranging ensures the uniform and stable of flow field, reduces eddy current to greatest extent.Desulfurization Control Systems detects data according to inlet flue gas CEMS, the circulating ash quantity required for reality is obtained after being calculated by computing module, then circulating ash system equipment control module is fed back to, quantitative setting circulating ash quantity, to ensure to realize desulfuration efficiency by minimum energy consumption.
Preferably, in the dynamic adjustments district of described desulfurizing tower, data are detected equally according to inlet flue gas CEMS, Desulfurization Control Systems calculates the spray gun solution regulated quantity of reacting and needing under optimum temperature damp condition by computing module (23), then dynamic adjustments module is fed back to, automatically carry out temperature and humidity adjustment, make the reaction condition that flue gas reaches desirable.
Preferably, most desulphurization reaction completes in main reaction region, and the pollutant that part does not participate in reaction in time enters reaction regulatory region (5) with flue gas, through further reacting adjustment, and the final reaction efficiency ensureing desulfurizing tower.
Preferably, neat stress after desulfurization enters current-sharing district (6), stable in current-sharing district (6) flow field, larger particle can be bonded at this zone impact through reacted circulating ash, bulky grain falls into the flue-dust retainer that bottom, absorption tower is arranged, tentatively realize gas solid separation, major part circulating ash enters follow-up sack cleaner (10) with flue gas, continue to participate in circular response after filter bag is separated, regularly discharge a certain amount of circulating ash to ensure the overall material balance of system from sack cleaner (10).
Preferably, in desulfurizing tower, carry out dynamic adjustments, dynamic adjustments module (7) comprise hydrojet module, module of whitewashing, any one and any combination of spraying in grey module.
Preferably, in desulfurizing tower, carry out the dynamic adjustments of circulating ash, fresh water (FW) or alkaline solution, regulate solution to adopt industrial conventional sodium hydroxide solution, potassium hydroxide solution, sodium carbonate liquor, sodium bicarbonate solution, ammoniacal liquor; The mass percent concentration of solution is regulated to be 0.1 ~ 60%, preferably 0.5 ~ 20%, especially preferably 0.5 ~ 5%.
Preferably, described technique can also add oxidant and activator, and described activator comprises alcamines, ferric sulfate, Complexing Iron; Described oxidant comprises potassium permanganate, postassium hypochlorite, hydrogen peroxide, potassium bichromate, ozone, chlorine; The mass percent concentration of described activator is 0.1 ~ 5%, preferably 0.5 ~ 3%, especially preferably 0.5 ~ 2%; The mass percent concentration of described oxidant is 0.1 ~ 5%, preferably 0.5 ~ 3%, especially preferably 0.5 ~ 2%.
Preferably, desulfurizing tower interior reaction temperature controls at 60 ~ 140 DEG C, is preferably 70 ~ 110 DEG C, most preferably is 75 ~ 90 DEG C; Pending flue-gas temperature, at 80 ~ 300 DEG C, is preferably 100 ~ 240 DEG C, most preferably is 120 ~ 180 DEG C; When carrying out absorption reaction, desulfurizing tower resistance≤600Pa, whole system resistance≤3000Pa.
Utility model beneficial effect
1. the utility model provides a kind of efficient semidry process desulfurizer based on dynamic response district, by using this device greatly can improve desulfuration efficiency, realizes SO
2minimum discharge, the idea that semi-dry desulfurizing process efficiency is not high is it is believed that before changing, the cost of investment of desulfurizing tower can reduce about 1/4 simultaneously, desulphurization system operation energy consumption reduces about 1/5, the denitration efficiency (different regulating measure designs is adopted to different flue gases) of 10% ~ 50% can also be realized simultaneously, whole system can adopt integrated design, equipment takes up space and also greatly reduces, desulfurizing tower eliminates venturi apparatus in tower, reduce SR, also reduce blower fan electrical power simultaneously.
2. desulfurizing tower of the present utility model can by the dynamic adjustments in dynamic adjustments module realization response district, the winding-up amount of circulating ash quantity and adjustment module is accurately calculated by computing module, ensure reaction zone preferably reaction condition, simultaneous reactions adjustment module and dynamic adjustments module can realize instantaneous interlock and regulate, maintain the reaction condition of whole conversion zone, realize the desulfuration efficiency of design with minimum circulating ash quantity.Sulfur removal technology of the present utility model improves desulfuration efficiency, decreases circulating ash quantity, reduces deduster load, extends the service life of deduster, dramatically saves on energy ezpenditure, is beneficial to adjustment in real time and monitoring, and decreases equipment maintenance frequency.
3. the structure of the utility model to existing semi-dry desulphurization part is transformed also very practical, and after transformation, desulphurization reaction is more abundant, and circulating ash particle diameter is more even, and mobility increases greatly, is more easy to conveying, also not easily blocks simultaneously.Flue gas is after dynamic adjustments desulfurizing tower in addition, flow field is more stable, the CONCENTRATION DISTRIBUTION of circulating ash is also more even, substantially improve the running environment of dust pelletizing system, whole system transformation only need be transformed desulfurizing tower, only needs toolability to transform to original dust pelletizing system and circulating ash system, reduce improvement cost, and significantly decrease the operating cost of semi-dry desulphurization system, the efficiency of existing semi-dry desulfurizing process can be improved, reduce system energy consumption simultaneously.
Accompanying drawing explanation
The square dynamic adjustments desulfurizing tower schematic diagram of giving vent to anger under Fig. 1 upper air.
Fig. 2 is based on the semi-dry desulfurizing process in dynamic response district.
Reference numeral implication: gas approach 1, commutating zone 2, dynamic adjustments district 3, main reaction region 4, reaction regulatory region 5, current-sharing district 6, dynamic adjustments module 7, reaction adjustment module 8, exhanst gas outlet 9, sack cleaner 10, flowmeter 11, control valve 12, solution pump 13, liquor box 14, air accumulator 15, root valve 16, check-valves 17, desulfurizing tower entrance surge bunker 18, circulating ash constant feeder 19, circulating ash feed-line 20, conveying equipment 21, defeated grey tank car 22, computing module 23
Detailed description of the invention
Below in conjunction with drawings and Examples, embodiment of the present utility model is further illustrated, but the utility model is not limited to listed embodiment.Also should be included in scope other any known change interior that the utility model is protected.
Accompanying drawing 1 is the square dynamic adjustments desulfurizer device of giving vent to anger under upper air, and with regard to described desulfurizing tower, desulfurizing tower comprises commutating zone 2, dynamic adjustments district 3, main reaction region 4, reaction regulatory region 5 and current-sharing district 6.
At commutating zone 2, flue gas completes basic circulating ash concentration adjustment.Main for system entry smoke components can be realized flue gas flow, SO through CEMS on-line detector by desulphurization system
2the detection of the data such as concentration, humidity of flue gas, flue-gas temperature, oxygen content is also input to computing module 23, the circulating ash quantity required for reality is obtained after being calculated by computing module 23 again, then circulating ash system equipment is fed back to, quantitative setting circulating ash quantity, to ensure to realize desulfuration efficiency by minimum energy consumption.
In dynamic adjustments district 3, detect data according to entrance CEMS equally, Desulfurization Control Systems obtains optimal temperature conditions, the damp condition of reaction needed by calculating mould 23 pieces of meters, then feed back to dynamic adjustments module, automatically carry out temperature and humidity adjustment, make the reaction condition that flue gas reaches desirable.
Desulphurization reaction mainly carries out in main reaction region 4, but along with the carrying out of reaction, extent of reaction can along with temperature, the change of humidity dies down gradually, efficiency declines, in order to ensure desulfurizing tower design effect, after flue gas enters reaction regulatory region 5 by main reaction region 4, further adjustment is reacted in desulfurizing tower, dynamic adjustments module 7 and reaction adjustment module 8 device therefor and principle substantially similar, just in regulated quantity control, do different optimization, reaction regulation blowing amount will much smaller than dynamic adjustments winding-up amount, after dynamic adjustments and reaction regulate, oxysulfide in flue gas can react fully with desulfurizing agent lime, circulating ash quantity controls in the most economical interval that can complete desulfurization task all the time simultaneously, therefore this sulfur removal technology can complete desulfurization task with both economical operation energy consumption.
Neat stress after desulfurization enters current-sharing district 6, in current-sharing district 6, flow field is relatively stable, larger particle can be bonded at this zone impact through reacted circulating ash, bulky grain falls into the flue-dust retainer that bottom, absorption tower is arranged, tentatively realize gas solid separation, major part circulating ash enters follow-up sack cleaner 10 with flue gas, continues to participate in circular response, regularly discharge a certain amount of circulating ash to ensure the overall material balance of system from sack cleaner 10 after filter bag is separated.Because the internal circulating load of circulating ash detects data for foundation with smoke inlet CEMS, there is two-stage adjustment module at reaction zone, the mass transfer effect of reaction zone strengthens greatly, and the utilization rate of circulating ash also increases greatly simultaneously.To give up grey testing result according to the discharge at scene, in the useless ash of the discharge of this technique, the ratio of active calcium oxide has dropped to less than 8%, and lower than 12% of other semidry processes, calcium sulfur ratio is reduced to about 1.1, also reduces operating cost.
In the dynamic adjustments structure that the utility model provides, dynamic adjustments module 7 used including, but not limited to water spray (also can be other liquid) module, module of whitewashing, spray the forms such as grey module, the winding-up amount of dynamic adjustments module 7 is by computing module 23 accurate Calculation, ensure reaction zone preferably reaction condition, simultaneously dynamic adjustments module 7 can realize instantaneous interlock with reaction adjustment module 8 and regulates, maintain the reaction condition of whole conversion zone, realize the desulfuration efficiency of design with minimum circulating ash quantity.
The solution that the utility model is jetted in dynamic adjustments district 3 and reaction regulatory region 5 comprises the alkaline solutions such as ammoniacal liquor, sodium carbonate liquor, sodium bicarbonate solution, sodium hydroxide solution, simultaneously all right suitable adding portion oxidant of solution and activator sprays in institute, as alcamines, ferric sulfate, Complexing Iron etc.During configuration solution, industrial wastewater can also be adopted to make solvent, the sewage disposal task reducing plant area while desulfurization pollutant control to greatest extent can be realized.As in Craft in Chemical Industrial Area, adopt deposed ammonia as solvent, to be configured to after solution, as regulating measure, desulfurization requirement can not only be met like this, the task of partial denitrification can also be played, also reduce the emission treatment task of deposed ammonia simultaneously.
When adopting the solution that adds activator for regulating sprayed solution, the mass percent concentration of solution is regulated to be 0.1 ~ 20%, preferably 0.5 ~ 10%, especially preferably 0.5 ~ 5%, the mass percent concentration of activator is 0.1 ~ 5%, preferably 0.5 ~ 3%, especially preferably 0.5 ~ 2%.When adopting NaOH and potassium hydroxide solution to be conditioning agent, the mass percent concentration of NaOH or potassium hydroxide solution is 0.5 ~ 30%, and be preferably 0.5 ~ 20%, optimum is 1 ~ 10%.
The process chart of a kind of embodiment of the present utility model as shown in Figure 2.Flue gas by former flue (due to length limitation reason, do not embody in the accompanying drawings) draw, measure after composition through CEMS and enter desulphurization system through absorption tower entrance, successively through commutating zone 2, dynamic adjustments district 3, main reaction region 4, reaction regulatory region 5 and current-sharing district 6 in desulfurizing tower, then enter sack cleaner 10, the clean flue gas after flue dust is separated sends into smoke stack emission through desulfurization air-introduced machine.The circulating ash that sack cleaner 10 separates delivers to desulfurizing tower entrance surge bunker 18 through conveying equipment 21, through the regulable control signal of computing module 23, quantitatively adds absorption tower, the ash circulation of completion system.Dynamic adjustments module 7, by external storage facilities configuration adjustment solution, as calculated after module 23 analytical calculation, quantitatively adds system, completes dynamic adjustments and reaction adjustment respectively, finally realizes SO
2minimum discharge target.
Embodiment 1
Unstripped gas forms: oxygen: 16.2% nitrogen: 68.39% water: 10.2% carbon dioxide: 5.2% sulfur dioxide: 800 ㎎/Nm
3nitrogen oxide: 280 ㎎/Nm
3smoke content: 100 ㎎/Nm
3.
Regulating system temperature is 100 DEG C, and desulfurizing tower inlet pressure is 100Kpa, and dynamic adjustments module 7 is directly sprayed water adjustment, controls smog discharge temperature and is more than or equal to 70 DEG C.The flow of gas is 180000Nm
3/ h.The CEMS arranged through chimney stage casing detects, and exit gas main component is as follows: oxygen: 16.36% sulfur dioxide: 10 ㎎/Nm
3nitrogen oxide: 220 ㎎/Nm
3smoke content: 10 ㎎/Nm
3.
Embodiment 2-8
Technological process and step are with embodiment 1, and the flue gas flow of each embodiment and main flue gas components unchanged, the temperature, pressure condition of Systematical control is constant, regulates SO in flue gas respectively
2concentration and NOX concentration, under different adjustment solution regulates, reaction result is in table 1.
The raw material composition of each embodiment of table 1 and result of the test
As can be seen from the above embodiments, the semi-dry desulfurizing process involved by the utility model is 1500 ㎎/Nm to entrance sulfur content
3, smoke content is 100 ㎎/Nm
3flue gas process after, sulphur and dust content all≤10 ㎎/Nm
3, denitration efficiency reaches 15% ~ 50%.When inlet flue gas sulfur content reaches 2000 ㎎/Nm
3time, outlet sulfur content≤30 ㎎/Nm
3, desulfuration efficiency has exceeded 98%, achieves minimum discharge target.System discharge gives up ash composition compared with other semidry processes in addition, and composition is more stable, and the calcium sulphate dihydrate component content in useless ash increases greatly, and the value of useless ash increases greatly.
Claims (3)
1., based on the efficient semi-dry desulphurization tower in dynamic response district, it is characterized in that described desulfurizing tower comprises gas approach (1), commutating zone (2), dynamic adjustments district (3), main reaction region (4), reaction regulatory region (5), current-sharing district (6) successively; Described dynamic adjustments district (3) is provided with dynamic adjustments module (7); Described reaction regulatory region (5) is provided with reaction adjustment module (8); Wherein, described gas approach (1) is positioned at the side on described commutating zone (2) top,
Described commutating zone (2) is positioned at the topmost of desulfurizing tower, downwards according to setting gradually described dynamic adjustments district (3), described main reaction region (4), described reaction regulatory region (5), described current-sharing district (6); The side of described current-sharing district (6) bottom is provided with exhanst gas outlet (9).
2. desulfurizing tower according to claim 1, is characterized in that, described dynamic adjustments module (7) comprises hydrojet module, module of whitewashing, any one and any combination of spraying in grey module.
3. based on the efficient semi-dry desulphurization system in dynamic response district, comprising: desulfurizing tower, exhanst gas outlet (9), sack cleaner (10), flowmeter (11), control valve (12), solution pump (13), liquor box (14), air accumulator (15), root valve (16), check-valves (17), desulfurizing tower input surge bunker (18), circulating ash constant feeder (19), circulating ash feed-line (20), conveying equipment (21), defeated grey tank car (22), computing module (23);
Described desulfurizing tower comprises gas approach (1), commutating zone (2), dynamic adjustments district (3), main reaction region (4), reaction regulatory region (5), current-sharing district (6) successively; Described dynamic adjustments district (3) is provided with dynamic adjustments module (7); Described reaction regulatory region (5) is provided with reaction adjustment module (8);
Described current-sharing district (6) is connected with described sack cleaner (10) by described exhanst gas outlet (9); Described conveying equipment (21) is arranged at described sack cleaner (10) bottom, and two ends connect defeated grey tank car (22), circulating ash feed-line (20) respectively; Described circulating ash feed-line (20) connects desulfurizing tower input surge bunker (18); Described circulating ash constant feeder (19) is arranged at described desulfurizing tower input surge bunker (18) between bottom and the top of desulfurizing tower;
The output pipeline of described air accumulator (15) is connected to tee pipe fitting by root valve (16), check-valves (17), valve successively, and 2 ports of tee pipe fitting connect described dynamic adjustments module (7), reaction adjustment module (8) respectively;
The output pipeline of described liquor box (14) is connected to another tee pipe fitting by solution pump (13), control valve (12), flowmeter (11) successively, and 2 ports of tee pipe fitting connect described dynamic adjustments module (7), reaction adjustment module (8) respectively; CEMS data are from computing module (23) input, by the control of PLC module realization to control valve (12).
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| CN107486004B (en) * | 2017-09-13 | 2020-08-04 | 佛山华清智业环保科技有限公司 | Intelligent denitration method and device for spray drying tower |
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| CN101234287A (en) * | 2008-03-06 | 2008-08-06 | 北京科大联创冶金技术有限公司 | Flue gas process control system using semi-dry process desulfurization defluorination |
| CN102716658A (en) * | 2012-06-26 | 2012-10-10 | 无锡高达环境科技有限公司 | Front semidry desulphurization system and desulphurization technology |
| CN104772032A (en) * | 2015-04-01 | 2015-07-15 | 浙江海元环境科技有限公司 | Semi-dry flue gas desulfurization and dust removal device and semi-dry flue gas desulfurization and dust removal process |
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2015
- 2015-08-17 CN CN201520620473.1U patent/CN205216550U/en active Active
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| CN105126591A (en) | 2015-12-09 |
| CN105126591B (en) | 2018-02-02 |
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