CN105536533A - Filter-liquid circulating system of desulfurization-and-denitration dust-deeply-collecting tower - Google Patents

Filter-liquid circulating system of desulfurization-and-denitration dust-deeply-collecting tower Download PDF

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Publication number
CN105536533A
CN105536533A CN201610026346.8A CN201610026346A CN105536533A CN 105536533 A CN105536533 A CN 105536533A CN 201610026346 A CN201610026346 A CN 201610026346A CN 105536533 A CN105536533 A CN 105536533A
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CN
China
Prior art keywords
filtrate
dinner
welcome
reservoir
discharge line
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CN201610026346.8A
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Chinese (zh)
Inventor
周文君
何文华
赵广明
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Jiangyin Shangshi Environment Engineering Co Ltd
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Jiangyin Shangshi Environment Engineering Co Ltd
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Priority to CN201610026346.8A priority Critical patent/CN105536533A/en
Publication of CN105536533A publication Critical patent/CN105536533A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06Spray cleaning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/60Simultaneously removing sulfur oxides and nitrogen oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/96Regeneration, reactivation or recycling of reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2247/00Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/04Regenerating the washing fluid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/20Reductants
    • B01D2251/206Ammonium compounds
    • B01D2251/2062Ammonia
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/12Methods and means for introducing reactants
    • B01D2259/124Liquid reactants

Abstract

The invention relates to a flue-gas desulfurization-and-denitration dust-deeply-collecting system. The flue-gas desulfurization-and-denitration dust-deeply-collecting system is characterized by comprising an integrated tower (1), a filter-liquid circulating system (2), a dust-washing water spraying circulating system (3), a defogging-spraying-liquid feeding system (4), an aerating system (5), a lime-slurry preparing system (6), a filter-liquid preparing system (7) and an accident-slurry recycling system (8). The flue-gas desulfurization-and-denitration dust-deeply-collecting system has the advantages of being low in construction cost and operating cost, good in desulfurization-and-denitration effect and easy and convenient to use and control.

Description

The filtrate cycle system of desulphurization denitration degree of depth gas wash tower
Technical field
The present invention relates to a kind of filtrate cycle system of desulphurization denitration degree of depth gas wash tower.
Background technology
Sulfur dioxide and nitrogen oxide affect larger gaseous contaminant in atmosphere pollution, has high risks to human body, environment and the ecosystem.Along with the increasingly stringent of environmental requirement, the problem of sulfur dioxide and discharged nitrous oxides more and more receives publicity.Sulfur dioxide and nitrogen oxide mainly stem from the combustion process of the fossil fuel such as coal, oil, and the roasting of ore, the fume emission of smelting process.Wherein various burning boiler particularly power plant boiler smoke evacuation there is the features such as concentration is low, exhaust gas volumn is large, floating dust is many and be difficult to administer.In conventional art, desulfurization and denitration are normally separately carried out by discharge sulfur dioxide in flue gas and purification of nitrogen oxides technology, which results in the defects such as the complexity of discharging flue gas purification system is huge, initial outlay is large, operating cost is high, seriously constrain the actual enforcement of discharge flue gas desulfurization and denitrification.
Desulfurization technology mainly half-driedly to be dispelled based on lime stone-gypsum wet, wet-type ammonia, rotating spraying, in-furnace calcium spraying afterbody heats activation, sea water desulfuration, electron-beam desulfurization, flue gas circulating fluidized bed desulfurization etc., wherein limestone-based process is the tail flue gas desulfur technology be most widely used in the world now, its subject matter is that the solubility of absorbent (lime or lime stone) is little, utilization rate is low, and waste residue amount is large.
Gas denitrifying technology mainly contains SCR technology (SCR), SNCR technology (SNCR), electronic beam method, impulse electric corona method, complex compound absorption process and urea absorptive method etc., gas denitrifying technology mainly SCR technology, SNCR technology and SNCR/SCR combination technique comparatively ripe in current operation, but there is initial investment costly in SCR method, operating temperature range is narrow, and there is NH_3 leakage, can N2O be generated, and the shortcoming such as catalyst easy in inactivation; And SNCR denitration efficiency is lower, and NH_3 leakage is many, easily causes secondary pollution.Countries in the world in recent years, especially industrially developed country has carried out the research and development of simultaneous SO_2 and NO removal technology all in succession, and carried out certain commercial Application, have electron beam irradiation method, impulse electric corona method, active carbon adsorption, NOxSO technique and Pahlman flue gas desulfurization and denitration technique etc. at present abroad, but China still lacks this type of technology at present or is not suitable with because of energy consumption and high cost.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, provide one for assembling construction, operating cost is lower, desulfurization off sulfide effect is good, uses the filtrate cycle system of the desulphurization denitration degree of depth gas wash tower controlling comparatively easy flue gas desulfurization and denitrification degree of depth dust pelletizing system.
The object of the present invention is achieved like this:
A filtrate cycle system for desulphurization denitration degree of depth gas wash tower, is characterized in that it comprises integrated tower, filtrate cycle system, the Water spray circulatory system of giving a dinner of welcome, aerating system, lime white preparation system and filtrate preparation system;
Described integrated tower is upwards disposed with integrated tower reservoir from bottom, flue access port, filtrate spray equipment, gas-liquid separation device, to give a dinner of welcome water spray system, demister and exhaust outlet, filtrate cycle system is connected with between described integrated tower reservoir and filtrate spray equipment, described gas-liquid separation device and give a dinner of welcome between water spray system and be connected with the Water spray circulatory system of giving a dinner of welcome, described integrated tower reservoir is circumscribed with aerating system, the middle filtrate that aerating system is formed, the precipitation slag that the lime white that lime white preparation system is formed and the Water spray circulatory system of giving a dinner of welcome are discharged feeds filtrate preparation system and prepares filtrate.
Described filtrate cycle system comprises the many filtrate cycle pipelines be arranged in parallel, one end of many filtrate cycle pipelines is integrally connected multiple filtrate cycle pipeline access ports of the sidewall of tower reservoir respectively, and the other end of many filtrate cycle pipelines connects the inlet of the filtrate shower of filtrate spray equipment respectively, filtrate cycle pipeline is disposed with filtrate cycle duct attenuation check-valves and filtrate cycle pipe circle pump from the one end near one end of filtrate cycle pipeline access port to the inlet of filtrate shower, described filtrate cycle pipe circle pump to filtrate shower inlet between filtrate cycle pipeline on be all connected with filtrate cycle pipe flushing water inlet pipe road, filtrate cycle pipeline between described filtrate cycle pipe circle pump to filtrate cycle pipeline access port is all connected with filtrate cycle pipe flushing water discharge pipe road, filtrate cycle pipe flushing water discharge pipe road is connected to drain, filtrate cycle pipeline between described filtrate cycle duct attenuation check-valves and filtrate cycle pipe circle pump is connected with filtrate input channel.
The described Water spray circulatory system of giving a dinner of welcome comprises from washing the Water spray liquid circulating line of giving a dinner of welcome that dust-water discharging port is connected to the inlet of water sprayer tube of giving a dinner of welcome bottom gas-liquid separation device, described in give a dinner of welcome on Water spray liquid circulating line and be disposed with water pot of giving a dinner of welcome, buffer tank and Water spray liquid circulating line circulating pump of giving a dinner of welcome from the one end near one end to the inlet of the water sprayer tube of giving a dinner of welcome near water spray system of giving a dinner of welcome of washing dust-water discharging port.
Described aerating system comprises aeration tank and aeration tank, aeration tank pipeline is connected with between the integrated tower reservoir of described aeration tank and integrated tower, described aeration tank pipeline is provided with reservoir excavationg pump, flushing water introduced by aeration tank pipeline between reservoir excavationg pump to aeration tank, be connected with aeration tank pipeline between described aeration tank and integrated tower reservoir, aeration tank pipeline also accesses drain.
Described filtrate preparation system comprises aeration tank filtrate access conduit, lime white access conduit, water pot discharge line of giving a dinner of welcome, reduction pond, reduction pond discharge line, reservoir, medicament prepare pond, medicament discharge line and reservoir discharge line, wherein the front end of aeration tank filtrate access conduit connects the aeration tank of aerating system, the access reduction pond, rear end of aeration tank filtrate access conduit, aeration tank filtrate access conduit is disposed with aeration tank Siphon pot from front to back, first feeding of filter press pump and the first filter press, the front end of lime white access conduit connects the lime white discharge line of lime white preparation system, the access reduction pond, rear end of lime white discharge line, the give a dinner of welcome front end of water pot discharge line connects the water pot of giving a dinner of welcome of the Water spray circulatory system of giving a dinner of welcome, give a dinner of welcome water pot discharge line rear end access reduction pond, the front end of reduction pond discharge line connects reduction pond, the rear end of reduction pond discharge line connects reservoir, reduction pond discharge line is disposed with the second feeding of filter press pump and the second filter press from front to back, the front end of medicament discharge line connects medicament and prepares pond, the rear end of medicament discharge line connects reservoir, medicament discharge line is disposed with medicament Siphon pot and compound pump from front to back, the front end of reservoir discharge line connects reservoir, the rear end of reservoir discharge line is connected to the filtrate input channel of filtrate cycle system, reservoir discharge line is disposed with from front to back reservoir Siphon pot and filtrate delivery pump.
The sidewall of described integrated tower reservoir accesses a disturbance pipeline, described disturbance pipeline has been arranged in parallel two disturbance pumps, the outer termination flushing water of disturbance pipeline.
Compared with prior art, the invention has the beneficial effects as follows:
1, nitric efficiency is high
To flue-gas temperature without particular/special requirement, nitric efficiency up to 85-95% owing to have employed advanced oxide reduction techniques and synchronously completing with desulfurization.So operating cost is low, this is that " SCR " and " SNCR " is inaccessiable at present.The whole closed cycle of desulphurization denitration water, and be configured with middle water dechlorination apparatus not to efflux wastewater, non-secondary pollution.In flue gas desulfurization and denitrification tower, utilize the inverse forward spray process of multiple tracks, sprayed into by absorbing liquid in flue gas, under the drive of high velocity air, absorbing liquid is blown to vaporific, and specific area is large, makes gas-liquid contact more abundant.Thus ensure that the stable of denitrification efficiency.
2, desulfur denitrate dust collecting integration
Because the circulation fluid activity after redox is good, so to the infiltration rate of SO2 is fast and efficiency is high.Show that desulfuration efficiency is up to 99.1% according to result of the test, lime-gypsum method and limestone-gypsum method institute inaccessiable.Because water washing dedust device has been installed on tower body top.So substantially increase the efficiency of dust collection of tower body.General wet type void tower spray technique efficiency of dust collection is generally also no more than 90% at 60-80% wet electrostatic, and the concentration of emission of the particle after desulfurization is also dropped to below 10mg/Nm3 up to 98.5% by our wet type water washing dedust technology dedusting technology, reach minimum discharge standard.
3, small investment, failure rate is low
In the wet static dedusting technology of application at present, investment is large.And operating cost is high, power consumption is large.And there is the problem of fluctuation of service.And our wet dust collection technology is clear water due to what circulate, and closed cycle, so failure rate is low, effect stability.System can ensure that long-term normal table runs, and maintenance is very little.Desulphurization denitration tower not containing the parts easily causing fouling, and adopts ammonia alkali liquid as absorbing liquid, effectively prevent the blocking of nozzle, there is not the problem such as fouling and blocking.The normal operation of overhaul of the equipments not influential system, system normal operation rate more than 98%.Operating cost is low.In traditional desulphurization denitration operating cost, desulfurization denitrification agent expense accounts for larger proportion, and native system uses ammonium sulfate do ammonia source and recycle, and does not consume in theory, actual cycle be ammonia and the catalyst of lime and minute quantity, so operating cost is lower.
Therefore for assembling, flue gas desulfurization and denitrification degree of depth dust pelletizing system has construction, operating cost is lower in the present invention, and desulfurization off sulfide effect is good, uses and controls comparatively easy advantage.
Accompanying drawing explanation
Fig. 1 is flue gas desulfurization and denitrification degree of depth dust pelletizing system schematic diagram.
Fig. 2 is the partial enlarged drawing in Fig. 1.
Fig. 3 is integrated the structural representation of tower.
Fig. 4 is the partial enlarged drawing in Fig. 3.
Fig. 5 is the top view of water conservancy diversion gripper shoe.
Fig. 6 is the structural representation of filtrate cycle system.
Fig. 7 is the structural representation of the Water spray circulatory system of giving a dinner of welcome.
Fig. 8 is the structural representation of demist spray liquid feed system.
Fig. 9 is the structural representation of aerating system.
Figure 10 is the structural representation of lime white preparation system.
Figure 11 is the connection diagram of filtrate preparation system and other system.
Figure 12 is the structural representation of filtrate preparation system.
Figure 13 is the structural representation of accident slurry reclaiming system.
Figure 14 is the structural representation of the filtrate cycle system of desulphurization denitration degree of depth gas wash tower.
Wherein:
Integrated tower 1, filtrate cycle system 2, the Water spray circulatory system 3 of giving a dinner of welcome, demist spray liquid feed system 4, aerating system 5, lime white preparation system 6, filtrate preparation system 7, accident slurry reclaiming system 8
Integrated tower reservoir 1.1, filtrate cycle pipeline access port 1.1.1, filter screen 1.1.2, disturbance pipeline 1.1.3, disturbance pump 1.1.4, flue access port 1.2, flue 1.2.1, filtrate spray equipment 1.3, filtrate shower 1.3.1, gas-liquid separation device 1.4, water conservancy diversion gripper shoe 1.4.1, through hole 1.4.2, mozzle 1.4.3, blast cap 1.4.4, dowel 1.4.5, wash dust-water discharging port 1.4.6, to give a dinner of welcome water spray system 1.5, give a dinner of welcome water sprayer tube 1.5.1, demister 1.6, board-like demister 1.6.1, demist shower 1.6.2, exhaust outlet 1.7
Filtrate cycle pipeline 2.1, filtrate cycle pipe circle pump 2.2, filtrate cycle pipe flushing water inlet pipe road 2.3, filtrate cycle pipe flushing water inlet pipe road damping check valve 2.4, filtrate cycle pipe flushing water discharge pipe road 2.5, filtrate cycle pipe flushing water discharge pipe road damping check valve 2.6, filtrate input channel 2.7, filtrate cycle duct attenuation check-valves 2.8
To give a dinner of welcome Water spray liquid circulating line 3.1, water pot 3.2 of giving a dinner of welcome, buffer tank 3.3, Water spray liquid circulating line circulating pump 3.4 of giving a dinner of welcome
Technique water pot 4.1, demist spray liquid input channel 4.2, demist spray liquid supply pump 4.3, technique water pot discharge line 4.4, answer quench pump 4.5
Aeration tank 5.1, aeration tank pipeline 5.2, reservoir excavationg pump 5.3, aeration tank 5.4, aeration tank pipeline 5.5, aeration tank oxidation tube 5.6, oxidation fan 5.7
Lime white prepares pond 6.1, feed bin 6.2, lime white discharge line 6.3, lime white Siphon pot 6.4, lime white excavationg pump 6.5
Aeration tank filtrate access conduit 7.1, aeration tank Siphon pot 7.1.1, first feeding of filter press pump 7.1.2, first filter press 7.1.3, lime white access conduit 7.2, to give a dinner of welcome water pot discharge line 7.3, reduction pond 7.4, reduction pond discharge line 7.5, second feeding of filter press pump 7.5.1, second filter press 7.5.2, reduction pond Siphon pot 7.5.3, reservoir 7.6, pond 7.7 prepared by medicament, medicament discharge line 7.8, medicament Siphon pot 7.8.1, compound pump 7.8.2, reservoir discharge line 7.9, reservoir Siphon pot 7.9.1, filtrate delivery pump 7.9.2
Accident slurry pool 8.1, accident slurry pool discharge line 8.2, accident slurry pool Siphon pot 8.2.1, accident slush pump 8.2.2.
Detailed description of the invention
See Fig. 1 ~ Figure 14, a kind of flue gas desulfurization and denitrification degree of depth dust pelletizing system that the present invention relates to, it comprises desulphurization denitration degree of depth dedusting integrated tower (referred to as integrated tower) 1, filtrate cycle system 2, the Water spray circulatory system 3 of giving a dinner of welcome, demist spray liquid feed system 4, aerating system 5, lime white preparation system 6, filtrate preparation system 7 and accident slurry reclaiming system 8.
Described integrated tower 1 is upwards disposed with integrated tower reservoir 1.1, flue access port 1.2, filtrate spray equipment 1.3, gas-liquid separation device 1.4, water spray system 1.5 of giving a dinner of welcome, demister 1.6 and is positioned at the exhaust outlet 1.7 at top from bottom.External filtrate cycle system 2 is connected with between described integrated tower reservoir 1.1 and filtrate spray equipment 1.3, described gas-liquid separation device 1.4 and give a dinner of welcome between water spray system 1.5 and be connected with the external Water spray circulatory system 3 of giving a dinner of welcome, described demister 1.6 is connected with external demist spray liquid feed system 4, and described integrated tower reservoir 1.1 is circumscribed with aerating system 5.The precipitation slag that the lime white that the middle filtrate that aerating system 5 is formed, lime white preparation system 6 are formed and the Water spray circulatory system 3 of giving a dinner of welcome are discharged feeds filtrate preparation system 7 and prepares filtrate.
Be provided with liquid level gauge and densitometer in described integrated tower reservoir 1.1, the sidewall of described integrated tower reservoir 1.1 is provided with four filtrate cycle pipeline access port 1.1.1, is provided with filter screen 1.1.2 at four filtrate cycle pipeline access port 1.1.1 places; The sidewall of described integrated tower reservoir 1.1 accesses a disturbance pipeline 1.1.3, described disturbance pipeline 1.1.3 has been arranged in parallel two disturbance pump 1.1.4, the outer termination flushing water of disturbance pipeline 1.1.3.
The flue 1.2.1 that described flue access port 1.2 and air-introduced machine supply is connected, and the flue gas in flue 1.2.1 is through the bag-type dust of preorder;
Described filtrate spray equipment 1.3 comprises the filtrate shower 1.3.1 of the four layers of level be evenly arranged, and the spray direction of filtrate shower 1.3.1 is downward;
Described gas-liquid separation device 1.4 comprises the water conservancy diversion gripper shoe 1.4.1 of tower 1 inwall that is connected in one, the oblique layout of described water conservancy diversion gripper shoe 1.4.1, described water conservancy diversion gripper shoe 1.4.1 is provided with the through hole 1.4.2 of arranged in arrays, through hole 1.4.2 is provided with mozzle 1.4.3, the over top of described mozzle 1.4.3 is provided with blast cap 1.4.4, described blast cap 1.4.4 is connected by multiple dowel 1.4.5 with between mozzle 1.4.3, the end face of described blast cap 1.4.4 is taper seat, and described blast cap 1.4.4 is welded from bending by one piece of arc.Offer at the sidewall of the integrated tower 1 of water conservancy diversion gripper shoe 1.4.1 low side and wash dust-water discharging port 1.4.6.
Described water spray system 1.5 of giving a dinner of welcome comprises the water sprayer tube 1.5.1 that gives a dinner of welcome of the two-layer level be evenly arranged, and the spray direction of the water sprayer tube 1.5.1 that gives a dinner of welcome is downward;
Described demister 1.6 comprises two-layer board-like demister 1.6.1, the below of the board-like demister 1.6.1 of lower floor is provided with an elimination spray painting shower pipe 1.6.2, two-layer demist shower 1.6.2 is provided with between two-layer board-like demister 1.6.1, wherein the demist shower 1.6.2 of bottom and the demist shower 1.6.2 of top layer sprays direction upwards, and the spray direction of the demist shower 1.6.2 in intermediate layer is downward.
Described filtrate cycle system 2 comprises the four filtrate cycle pipelines 2.1 be arranged in parallel, one end of four filtrate cycle pipelines 2.1 connects four filtrate cycle pipeline access port 1.1.1 respectively, and the other end of four filtrate cycle pipelines 2.1 connects the inlet of filtrate shower 1.3.1 respectively, filtrate cycle pipeline 2.1 is disposed with filtrate cycle duct attenuation check-valves 2.8 and filtrate cycle pipe circle pump 2.2 from the one end near one end of filtrate cycle pipeline access port 1.1.1 to the inlet of filtrate shower 1.3.1, filtrate cycle pipeline 2.1 between the inlet of described filtrate cycle pipe circle pump 2.2 to filtrate shower 1.3.1 is all connected with filtrate cycle pipe flushing water inlet pipe road 2.3, filtrate cycle pipe flushing water inlet pipe road 2.3 is provided with filtrate cycle pipe flushing water inlet pipe road damping check valve 2.4, filtrate cycle pipeline 2.1 between described filtrate cycle pipe circle pump 2.2 to filtrate cycle pipeline access port 1.1.1 is all connected with filtrate cycle pipe flushing water discharge pipe road 2.5, filtrate cycle pipe flushing water discharge pipe road 2.5 is connected to drain, filtrate cycle pipe flushing water discharge pipe road 2.5 is provided with filtrate cycle pipe flushing water discharge pipe road damping check valve 2.6.Filtrate cycle pipeline 2.1 between described filtrate cycle duct attenuation check-valves 2.8 and filtrate cycle pipe circle pump 2.2 is connected with filtrate input channel 2.7.
The described Water spray circulatory system 3 of giving a dinner of welcome comprises the Water spray liquid circulating line 3.1 of giving a dinner of welcome from washing dust-water discharging port 1.4.6 and be connected to the inlet of the water sprayer tube 1.5.1 that gives a dinner of welcome, described in give a dinner of welcome on Water spray liquid circulating line 3.1 and be disposed with water pot 3.2 of giving a dinner of welcome, buffer tank 3.3 and three groups of Water spray liquid circulating line circulating pumps 3.4 of giving a dinner of welcome be arranged in parallel from the one end near one end to the inlet near the water sprayer tube 1.5.1 that gives a dinner of welcome of washing dust-water discharging port 1.4.6.
Described demist spray liquid feed system 4 comprises technique water pot 4.1, the fresh water (FW) input port at described technique water pot 4.1 top connects extraneous, first discharge outlet bottom described technique water pot 4.1 is connected to the inlet of demist shower 1.6.2 by demist spray liquid input channel 4.2, described demist spray liquid input channel 4.2 is arranged in parallel three groups of demist spray liquid supply pumps 4.3, second discharge outlet bottom described technique water pot 4.1 is connected to the entrance of integrated tower 1 by technique water pot discharge line 4.4, described technique water pot discharge line 4.4 is arranged in parallel two and answers quench pump 4.5.
Described aerating system 5 comprises aeration tank 5.1 and aeration tank 5.4, aeration tank pipeline 5.2 is connected with between described aeration tank 5.1 and the integrated tower reservoir 1.1 of integrated tower 1, described aeration tank pipeline 5.2 is arranged in parallel two reservoir excavationg pumps 5.3, flushing water introduced by aeration tank pipeline 5.2 between reservoir excavationg pump 5.3 to aeration tank 5.1, be connected with aeration tank pipeline 5.5 between described aeration tank 5.4 and the integrated tower reservoir 1.1 of integrated tower 1, aeration tank pipeline 5.5 also accesses drain.Agitating device is provided with, the external oxidation fan 5.7 of aeration tank oxidation tube 5.6 of aeration tank 5.1 inner bottom part in described aeration tank 5.1.
Described lime white preparation system 6 comprises lime white and prepares pond 6.1, lime white is prepared in pond 6.1 and is provided with agitating device, the top that pond 6.1 prepared by lime white is provided with feed bin 6.2, lime white is prepared pond 6.1 and is drawn a lime white discharge line 6.3, lime white discharge line 6.3 is disposed with from front to back lime white Siphon pot 6.4 and two groups of lime white excavationg pumps 6.5 be arranged in parallel, the lime white discharge line 6.3 in lime white excavationg pump 6.5 front accesses drain, and flushing water introduced by the lime white discharge line 6.3 at lime white excavationg pump 6.5 rear.
Described filtrate preparation system 7 comprises aeration tank filtrate access conduit 7.1, lime white access conduit 7.2, water pot discharge line 7.3 of giving a dinner of welcome, be arranged in parallel two reduction ponds 7.4, reduction pond discharge line 7.5, reservoir 7.6, medicaments prepare pond 7.7, medicament discharge line 7.8 and reservoir discharge line 7.9.The wherein connection aeration tank, front end 5.1 of aeration tank filtrate access conduit 7.1, the rear end of aeration tank filtrate access conduit 7.1 separates two and accesses two reduction ponds 7.4 respectively, aeration tank filtrate access conduit 7.1 is disposed with from front to back aeration tank Siphon pot 7.1.1, two the first feeding of filter press pump 7.1.2 and the first filter press 7.1.3 be arranged in parallel, the aeration tank filtrate access conduit 7.1 between aeration tank Siphon pot 7.1.1 and the first feeding of filter press pump 7.1.2 introduces flushing water.The front end of lime white access conduit 7.2 connects lime white discharge line 6.3, and the rear end of lime white discharge line 6.3 separates two and accesses two reduction ponds 7.4 respectively.The give a dinner of welcome front end of water pot discharge line 7.3 connects the discharge gate of giving a dinner of welcome bottom water pot 3.2, and the rear end of water pot discharge line 7.3 of giving a dinner of welcome separates two and accesses two reduction ponds 7.4 respectively.Agitating device is provided with in two reduction ponds 7.4.The front end connection of reduction pond discharge line 7.5 separates two and connects two the reduction ponds 7.4 be arranged in parallel respectively, the rear end of reduction pond discharge line 7.5 connects reservoir 7.6, reduction pond discharge line 7.5 is disposed with the second feeding of filter press pump 7.5.1 and the second filter press 7.5.2 that are arranged in parallel from front to back, reduction pond discharge line 7.5 and two reduce junction, pond 7.4 and are provided with one and reduce pond Siphon pot 7.5.3, and flushing water introduced by the reduction pond discharge line 7.5 between the second feeding of filter press pump 7.5.1 and the second filter press 7.5.2.The front end of medicament discharge line 7.8 connects medicament and prepares pond 7.7, the rear end of medicament discharge line 7.8 connects reservoir 7.6, medicament is prepared in pond 7.7 and is provided with agitating device, two compound pump 7.8.2 medicament discharge line 7.8 being disposed with from front to back medicament Siphon pot 7.8.1 and being arranged in parallel, flushing water introduced by the medicament discharge line 7.8 at compound pump 7.8.2 rear.The front end of reservoir discharge line 7.9 connects reservoir 7.6, the rear end of reservoir discharge line 7.9 is connected to filtrate input channel 2.7, reservoir discharge line 7.9 is disposed with from front to back the filtrate delivery pump 7.9.2 that reservoir Siphon pot 7.9.1 and two is arranged in parallel, flushing water introduced by the reservoir discharge line 7.9 at filtrate delivery pump 7.9.2 rear.
Described accident slurry reclaiming system 8 comprises accident slurry pool 8.1, agitating device is provided with in described accident slurry pool 8.1, accident slurry pool discharge line 8.2 is connected with between described accident slurry pool 8.1 to integrated tower 1, described accident slurry pool discharge line 8.2 is disposed with from front to back the accident slush pump 8.2.2 that accident slurry pool Siphon pot 8.2.1 and two is arranged in parallel, the former slurry pool discharge line 8.2 in accident slush pump 8.2.2 front accesses drain, the pipeline that the former slurry pool discharge line 8.2 in accident slush pump 8.2.2 front is connected with drain is provided with damping check valve, flushing water introduced by the former slurry pool discharge line 8.2 at accident slush pump 8.2.2 rear, the flushing water pipeline of the former slurry pool discharge line 8.2 at accident slush pump 8.2.2 rear is provided with damping check valve.
This programme adopts SO2 and NOx in circulation ammonia-soda process absorption flue gas, and namely use ammonia alkali liquid as desulfurization denitrification agent, lime is as the agent of ammonia alkali circular regeneration.Its general principle is: ammonia enters in desulfurizing tower the sulfur dioxide, the nitrogen oxide that absorb in flue gas, then (Main Ingredients and Appearance is Ca (OH) to use lime white 2) regeneration of desulphurization denitration product is displaced ammonia and returns to desulphurization denitration in desulphurization denitration tower.
Design principle
1, desulfurizing and denitrifying process follows technology maturation, equipment advanced person is stable, convenient operating maintenance, automaticity are higher, operating cost is lower, non-secondary pollution principle.High Availabitity rate, high desulphurization denitration rate, low lime consumption amount, low pressure power consumption and low water consumption can be ensured, and meet environmental protection requirement completely.
2, system for desulfuration and denitration is considered from all many factors such as desulphurization denitration places after boiler type, load, stove, proposes rational desulfurizing and denitrifying process scheme.
3, desulfurizing and denitrifying process takes into full account boil characteristic, and SR is stablized, and desulfuring and denitrifying apparatus normally runs opening, stop, run and do not affect in accident treatment situation boiler.
4, desulfurizing and denitrifying process adapts to load variations and the fluctuations such as boiler air quantity, temperature, SO2, NOx concentration.
5, desulfurizing and denitrifying process and apparatus arrangement rationally, can meet the Placement of general layout requirement that proprietor proposes.In literary composition the system that describes and layout be basic demand, by detailed technological design, realize all engine requests, build a complete desulfuring and denitrifying apparatus.
6, desulfurization denitrification agent and accessory substance mass transport, circulation smoothness, capabilities match.
7, desulphurization denitration main equipment design service life is not less than 15 years.
8, desulfurization denitrification agent less expensive, be easy to obtain.
9, desulfuring and denitrifying apparatus adopts DCS to control, and considers to be connected with the signal of major project simultaneously, reserved communication interface.
10, desulphurization denitration accessory substance gypsum moisture content is less than 10%, with automobile outward transport, and comprehensive utilization.
11, after desulphurization denitration, flue gas gathers laggard chimney (need anticorrosion, demanding party is responsible for) discharge.
12, all buildings or structures layouts of whole flue gas desulfurization and denitrification system are coordinated with major project.And will optimize in given regional extent with arrangement requirement according to its engineering design, to make its technological process and connection and reasonable arrangement, safety and economy.
13, desulphurization denitration region water, electricity, gas use, and install metering device by the subtube be connected with main factory house steward, and these energy measurement datas are included in control system display, and information interface that is reserved and main device CEMS system docking.
14, supplier proposes the water quality of industry water needed for flue gas desulfurization and denitrification system (cooling water of fresh water (FW), each rotating machinery), hydraulic pressure, water yield requirement, and compressed air for instrument consumption and relevant parameter requirement.Flue gas desulfurization and denitrification system industrial water source used is carried by being responsible for by demanding party.Flue gas desulfurization and denitrification system compressed air gas source be responsible for by demanding party.Flue gas desulfurization and denitrification system transfer before institute construction and debug industry water, steam etc. will carry interface position by demanding party.
Performance parameter and operating analysis
Sequence number Technology category Nitric efficiency Desulfuration efficiency Operating cost
1 Lime-gypsum method Nothing 90-97% High
2 Limestone-gypsum method Nothing 90-95% Moderate
3 Dual alkali 5-10% 90-95% High
4 Ammonia process 10-15% 95-99% Byproduct can support ammoniacal liquor expense
5 SCR 60-85% 5-10% High
6 SNCR 30-60% 5-10% Moderate
7 Low-NO_x combustion technology 20-35% Nothing Low
8 This technology 85-95% 96-99% Low

Claims (6)

1. a filtrate cycle system for desulphurization denitration degree of depth gas wash tower, is characterized in that it comprises integrated tower (1), filtrate cycle system (2), the Water spray circulatory system of giving a dinner of welcome (3), aerating system (5), lime white preparation system (6) and filtrate preparation system (7);
Described integrated tower (1) is upwards disposed with integrated tower reservoir (1.1) from bottom, flue access port (1.2), filtrate spray equipment (1.3), gas-liquid separation device (1.4), to give a dinner of welcome water spray system (1.5), demister (1.6) and exhaust outlet (1.7), filtrate cycle system (2) is connected with between described integrated tower reservoir (1.1) and filtrate spray equipment (1.3), the Water spray circulatory system (3) of giving a dinner of welcome is connected with between described gas-liquid separation device (1.4) and water spray system of giving a dinner of welcome (1.5), described integrated tower reservoir (1.1) is circumscribed with aerating system (5), the middle filtrate that aerating system (5) is formed, the precipitation slag that the lime white that lime white preparation system (6) is formed and the Water spray circulatory system (3) of giving a dinner of welcome are discharged feeds filtrate preparation system (7) and prepares filtrate.
2. the filtrate cycle system of a kind of desulphurization denitration degree of depth gas wash tower according to claim 1, it is characterized in that described filtrate cycle system (2) comprises the many filtrate cycle pipelines (2.1) be arranged in parallel, one end of many filtrate cycle pipelines (2.1) is integrally connected multiple filtrate cycle pipeline access ports (1.1.1) of the sidewall of tower reservoir (1.1) respectively, and the other end of many filtrate cycle pipelines (2.1) connects the inlet of the filtrate shower (1.3.1) of filtrate spray equipment (1.3) respectively, filtrate cycle pipeline (2.1) is disposed with filtrate cycle duct attenuation check-valves (2.8) and filtrate cycle pipe circle pump (2.2) from the one end near one end of filtrate cycle pipeline access port (1.1.1) to the inlet of filtrate shower (1.3.1), described filtrate cycle pipe circle pump (2.2) to filtrate shower (1.3.1) inlet between filtrate cycle pipeline (2.1) on be all connected with filtrate cycle pipe flushing water inlet pipe road (2.3), filtrate cycle pipeline (2.1) between described filtrate cycle pipe circle pump (2.2) to filtrate cycle pipeline access port (1.1.1) is all connected with filtrate cycle pipe flushing water discharge pipe road (2.5), filtrate cycle pipe flushing water discharge pipe road (2.5) is connected to drain, filtrate cycle pipeline (2.1) between described filtrate cycle duct attenuation check-valves (2.8) and filtrate cycle pipe circle pump (2.2) is connected with filtrate input channel (2.7).
3. the filtrate cycle system of a kind of desulphurization denitration degree of depth gas wash tower according to claim 1, the Water spray circulatory system of giving a dinner of welcome described in it is characterized in that (3) comprise from gas-liquid separation device (1.4) bottom wash the Water spray liquid circulating line (3.1) of giving a dinner of welcome that dust-water discharging port (1.4.6) is connected to the inlet of water sprayer tube of giving a dinner of welcome (1.5.1), described Water spray liquid circulating line (3.1) of giving a dinner of welcome is disposed with water pot of giving a dinner of welcome (3.2) from the one end near one end to the inlet of the water sprayer tube of giving a dinner of welcome (1.5.1) near water spray system (1.5) of giving a dinner of welcome of washing dust-water discharging port (1.4.6), buffer tank (3.3) and Water spray liquid circulating line circulating pump (3.4) of giving a dinner of welcome.
4. the filtrate cycle system of a kind of desulphurization denitration degree of depth gas wash tower according to claim 1, it is characterized in that described aerating system (5) comprises aeration tank (5.1) and aeration tank (5.4), aeration tank pipeline (5.2) is connected with between the integrated tower reservoir (1.1) of described aeration tank (5.1) and integrated tower (1), described aeration tank pipeline (5.2) is provided with reservoir excavationg pump (5.3), flushing water introduced by aeration tank pipeline (5.2) between reservoir excavationg pump (5.3) to aeration tank (5.1), aeration tank pipeline (5.5) is connected with between described aeration tank (5.4) and integrated tower reservoir (1.1), aeration tank pipeline (5.5) also accesses drain.
5. the filtrate cycle system of a kind of desulphurization denitration degree of depth gas wash tower according to claim 1, is characterized in that described filtrate preparation system (7) comprises aeration tank filtrate access conduit (7.1), lime white access conduit (7.2), water pot discharge line (7.3) of giving a dinner of welcome, reduction pond (7.4), reduction pond discharge line (7.5), reservoir (7.6), medicament prepares pond (7.7), medicament discharge line (7.8) and reservoir discharge line (7.9); wherein the front end of aeration tank filtrate access conduit (7.1) connects the aeration tank (5.1) of aerating system (5), rear end access reduction pond (7.4) of aeration tank filtrate access conduit (7.1), aeration tank filtrate access conduit (7.1) is disposed with from front to back aeration tank Siphon pot (7.1.1), first feeding of filter press pump (7.1.2) and the first filter press (7.1.3), the front end of lime white access conduit (7.2) connects the lime white discharge line (6.3) of lime white preparation system (6), rear end access reduction pond (7.4) of lime white discharge line (6.3), the give a dinner of welcome front end of water pot discharge line (7.3) connects the water pot of giving a dinner of welcome (3.2) of the Water spray circulatory system (3) of giving a dinner of welcome, give a dinner of welcome water pot discharge line (7.3) rear end access reduction pond (7.4), the front end of reduction pond discharge line (7.5) connects reduction pond (7.4), the rear end of reduction pond discharge line (7.5) connects reservoir (7.6), reduction pond discharge line (7.5) is disposed with the second feeding of filter press pump (7.5.1) and the second filter press (7.5.2) from front to back, the front end of medicament discharge line (7.8) connects medicament and prepares pond (7.7), the rear end of medicament discharge line (7.8) connects reservoir (7.6), medicament discharge line (7.8) is disposed with from front to back medicament Siphon pot (7.8.1) and compound pump (7.8.2), the front end of reservoir discharge line (7.9) connects reservoir (7.6), the rear end of reservoir discharge line (7.9) is connected to the filtrate input channel (2.7) of filtrate cycle system (2), reservoir discharge line (7.9) is disposed with from front to back reservoir Siphon pot (7.9.1) and filtrate delivery pump (7.9.2).
6. a kind of flue gas desulfurization and denitrification degree of depth dust pelletizing system according to claim 1, it is characterized in that the sidewall of described integrated tower reservoir (1.1) accesses a disturbance pipeline (1.1.3), described disturbance pipeline (1.1.3) is arranged in parallel two disturbance pumps (1.1.4), the outer termination flushing water of disturbance pipeline (1.1.3).
CN201610026346.8A 2016-01-16 2016-01-16 Filter-liquid circulating system of desulfurization-and-denitration dust-deeply-collecting tower Pending CN105536533A (en)

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Application publication date: 20160504