CN109925863A - A kind of wet electricity of the ammonia process of desulfurization takes off white minimum discharge system - Google Patents
A kind of wet electricity of the ammonia process of desulfurization takes off white minimum discharge system Download PDFInfo
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- CN109925863A CN109925863A CN201910198853.3A CN201910198853A CN109925863A CN 109925863 A CN109925863 A CN 109925863A CN 201910198853 A CN201910198853 A CN 201910198853A CN 109925863 A CN109925863 A CN 109925863A
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Abstract
The present invention provides a kind of wet electricity of the ammonia process of desulfurization and takes off white minimum discharge system, reasonable in design, eliminate white plume, reduce finely ground particles.Water washing cycles case two passes through the washing connection washing condenser pump of condensate line one；Wash the thermal fluid inlet that condenser pump connects cool-down condensing device by washing condensate line two；The hot fluid outlet ports of cool-down condensing device condense layer interface by the washing that washing condensate line three connects ammonia process desulfuration tower；The cold fluid inlet of low-temperature circulating water pipeline connection cool-down condensing device；The cold fluid outlet of high temperature circulation water pipeline connection cool-down condensing device；The smoke inlet of wet electrical dust precipitator is connected by net flue with exhaust pass；Wet electrical dust precipitator is connected by the cold fluid inlet of connection flue and heating system；The cold fluid outlet of heating system is connect by discharging flue with chimney；The connection of the thermal fluid inlet of steam pipe line and heating system；The connection of the hot fluid outlet ports of hydrophobic pipeline and heating system.
Description
Technical field
The present invention relates to a kind of wet electricity of ammonia process of desulfurization to take off white minimum discharge system.
Background technique
The ammonia process of desulfurization carries out absorbing reaction to the sulfur dioxide in flue gas mainly using ammonium hydroxide as desulfurizing agent, generates secondary
Product sulphur ammonium, as shown in the Chinese patent application No. is 201610322911.5.For the chemical plant that there is synthesis ammonia in plant area,
The preferred ammonia process of desulfurization of heat power station boiler flue gas desulfurization meeting, on the one hand, desulfurizing agent ammonium hydroxide steady sources, economy；On the other hand, secondary
Product sulphur ammonium is one kind of chemical fertilizer, and economic value is higher.
The ammonia process of desulfurization compares for calcium method desulfurization, and more efficient, system is more rigorous.But ammonia process is due to the spy of its technique
Different property, on the one hand, can inevitably generate ammonium sulfite and Ammonium Sulfate Aerosol, form the white cigarette of the escaping of ammonia and hangover
Plumage；On the other hand, many very small particulate matters can be generated in ammonia process of desulfurization reaction process, although environmental protection tests is caused to meet
It is required that but outlet smoke evacuation sensory effects it is poor.In addition, minimum discharge provides and takes off a wide range of implementation of white requirement, existing many ammonia
Method desulfurization equipment does not meet discharge standard.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and provide it is a kind of it is reasonable in design,
Eliminate white plume, the wet electricity of the ammonia process of desulfurization of reduction finely ground particles takes off white minimum discharge system.
Technical solution used by the present invention solves the above problems is: a kind of wet electricity of the ammonia process of desulfurization takes off white minimum discharge system
System, including ammonia process of desulfurization tower section, concentration cycles part, absorption cycle part and water washing cycles part；
Ammonia process of desulfurization tower section includes gas approach, ammonia process desulfuration tower and exhaust pass；The cigarette of gas approach and ammonia process desulfuration tower
The connection of gas entrance；The connection of the exhanst gas outlet of exhaust pass and ammonia process desulfuration tower；
Concentration cycles part includes concentration cycles pipeline one, concentrated circulating pump and concentration cycles pipeline two；Concentration cycles pump inlet
It is connected by concentration cycles pipeline one with ammonia process desulfuration tower；Concentration cycles pump discharge passes through concentration cycles pipeline two and the ammonia process of desulfurization
Tower is connected；
Absorption cycle part includes oxidation cycle case, absorption cycle pipeline one, absorbent recirculation pump and absorption cycle pipeline two；Oxidation
Circulating box connects absorbent recirculation pump by absorption cycle pipeline one；Absorbent recirculation pump connects ammonia process by absorption cycle pipeline two and takes off
Sulphur tower；
Water washing cycles part includes water washing cycles case one, water washing cycles pipeline one, water washing cycles pump and water washing cycles pipeline two；Water
It washes circulating box one and water washing cycles pump is connected by water washing cycles pipeline one；Water washing cycles pump connects ammonia by water washing cycles pipeline two
Method desulfurizing tower；
It is characterized by also including washing cooling condensation portion, wet electricity part and heat temperature raising discharge units；
Washing cooling condensation portion includes water washing cycles case two, washing condensate line one, washing condenser pump, washing condensate line
Two, cool-down condensing device, washing condensate line three, low-temperature circulating water pipeline and high temperature circulation water pipeline；Water washing cycles case two-way
Cross the connection washing condenser pump of washing condensate line one；It washes condenser pump and cool-down condensing device is connected by washing condensate line two
Thermal fluid inlet；The hot fluid outlet ports of cool-down condensing device connect the washing condensation of ammonia process desulfuration tower by washing condensate line three
Layer interface；The cold fluid inlet of low-temperature circulating water pipeline connection cool-down condensing device；The connection cooling condensation of high temperature circulation water pipeline
The cold fluid outlet of device；
Wet electricity part includes net flue and wet electrical dust precipitator；The smoke inlet of wet electrical dust precipitator passes through net flue and outlet cigarette
Road is connected；
Heat temperature raising discharge unit includes connection flue, heating system, steam pipe line, hydrophobic pipeline, discharge flue and cigarette
Chimney；Wet electrical dust precipitator is connected by the cold fluid inlet of connection flue and heating system；The cold flow of heating system
Body outlet is connect by discharging flue with chimney；The connection of the thermal fluid inlet of steam pipe line and heating system；Hydrophobic pipeline
It is connect with the hot fluid outlet ports of heating system.
Ammonia process of desulfurization tower section of the present invention further includes demister, and demister is mounted in ammonia process desulfuration tower.
Demister of the present invention is three layers, and first layer demister, second layer demister, third layer demister are arrived by down
On be sequentially arranged in ammonia process desulfuration tower.
Wet electricity part of the present invention further includes flushing water pipeline, the flushing water of flushing water pipeline and wet electrical dust precipitator
Entrance connection.
Compared with prior art, the present invention having the following advantages that and effect:
(1) candidate process of the washing cooling condensation portion as water washing cycles, on the one hand can further wash flue gas, subtract
Few the escaping of ammonia and finely ground particles therein；On the other hand, the recirculated water condensed by cool-down condensing device, in countercurrent washing cigarette
While gas, flue-gas temperature can be reduced again, and saturation vapour in flue gas is precipitated at condensed water, to reduce in neat stress
Absolute moisture content.
(2) setting of wet electrical dust precipitator further depth can reduce particle content in neat stress.
(3) heating system heats neat stress using low-pressure steam as heat source, makes neat stress temperature
Higher than dew-point temperature, the opposite water capacity of wet flue gas is reduced with this, realizes the purpose for eliminating white plume.
(4) the effective combination of flue gas desulfurization+condensation+demisting+wet electricity+heating per pass process, ensure that the ultralow row of flue gas
It puts, wherein SO2≤35mg/Nm3, dust≤5mg/Nm3, NH3≤3mg/Nm3, droplet≤15mg/Nm3, and flue gas is without obvious white
Plume.
Detailed description of the invention
Fig. 1 is the ammonia process of desulfurization of embodiment of the present invention tower section, concentration cycles part, absorption cycle part, water washing cycles portion
Divide, the structural schematic diagram of washing cooling condensation portion.
Fig. 2 is the structural schematic diagram of wet electricity part and heat temperature raising discharge unit of the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Referring to Fig. 1 and Fig. 2, the embodiment of the present invention includes ammonia process of desulfurization tower section, concentration cycles part, absorption cycle portions
Divide, water washing cycles part, wash cooling condensation portion, wet electricity part and heat temperature raising discharge unit.
Ammonia process of desulfurization tower section includes that gas approach 1.1, ammonia process desulfuration tower 1.2, first layer demister 1.3, the second layer remove
Day with fog 1.4, third layer demister 1.5 and exhaust pass 1.6.The smoke inlet of gas approach 1.1 and ammonia process desulfuration tower 1.2 connects
It connects.First layer demister 1.3, second layer demister 1.4, third layer demister 1.5 are sequentially arranged at the ammonia process of desulfurization from bottom to top
In tower 1.2.Exhaust pass 1.6 is connect with the exhanst gas outlet of ammonia process desulfuration tower 1.2.Flue gas enters ammonia process from gas approach 1.1 and takes off
Sulphur tower 1.2, successively after the processing of first layer demister 1.3, second layer demister 1.4 and third layer demister 1.5, through exporting
Flue 1.6 is discharged into net flue 6.1, into subsequent wet electric treatment.
Concentration cycles part includes concentration cycles pipeline 1, concentrated circulating pump 2.2 and concentration cycles pipeline 2 2.3.It is dense
2.2 import of contracting circulating pump is connected by concentration cycles pipeline 1 with the adapter tube of ammonia process desulfuration tower 1.2；Concentrated circulating pump 2.2 goes out
Mouth is connected by concentration cycles pipeline 2 2.3 with the concentration layer interface of ammonia process desulfuration tower 1.2.
Absorption cycle part includes that oxidation cycle case 3.1, absorption cycle pipeline 1, absorbent recirculation pump 3.3 and absorption follow
Endless tube line 2 3.4.Oxidation cycle case 3.1 connects absorbent recirculation pump 3.3 by absorption cycle pipeline 1；Absorbent recirculation pump 3.3
The absorbing reaction layer interface of ammonia process desulfuration tower 1.2 is connected by absorption cycle pipeline 2 3.4.
Water washing cycles part includes water washing cycles case 1, water washing cycles pipeline 1, water washing cycles pump 4.3 and washing
Pipeloop 2 4.4.Water washing cycles case 1 connects water washing cycles pump 4.3 by water washing cycles pipeline 1；Water washing cycles
Pump 4.3 connects the water washing cleaning layer interface of ammonia process desulfuration tower 1.2 by water washing cycles pipeline 2 4.4.
Washing cooling condensation portion include water washing cycles case 2 5.1, washing condensate line 1, washing condenser pump 5.3,
Washing condensate line 2 5.4, cool-down condensing device 5.5, washing condensate line 3 5.6, low-temperature circulating water pipeline 5.7 and high temperature follow
Ring water pipeline 5.8.Water washing cycles case 2 5.1 passes through the washing connection washing condenser pump 5.3 of condensate line 1；Wash condenser pump
5.3 connect the thermal fluid inlet of cool-down condensing device 5.5 by washing condensate line 2 5.4；The hot-fluid of cool-down condensing device 5.5
Body outlet condenses layer interface by the washing that washing condensate line 3 5.6 connects ammonia process desulfuration tower 1.2；Low-temperature circulating water pipeline
The cold fluid inlet of 5.7 connection cool-down condensing devices 5.5；The cold flow of the connection cool-down condensing device 5.5 of high temperature circulation water pipeline 5.8
Body outlet.Recirculated water passes sequentially through water washing cycles case 2 5.1, washing condensate line 1, washing condenser pump 5.3, washing condensation
Pipeline 2 5.4 enters the heat exchange cooling of cool-down condensing device 5.5, then enters ammonia process desulfuration tower by washing condensate line 3 5.6
In 1.2, flue gas is further washed.Recirculated water in low-temperature circulating water pipeline 5.7 enters the heat exchange heating of cool-down condensing device 5.5
Enter high temperature circulation water pipeline 5.8 afterwards.
Wet electricity part includes net flue 6.1, wet electrical dust precipitator 6.2 and flushing water pipeline 6.3.Wet electrical dust precipitator 6.2
Smoke inlet be connected with exhaust pass 1.6 by net flue 6.1；The flushing of flushing water pipeline 6.3 and wet electrical dust precipitator 6.2
Water inlet connection.Flue gas in net flue 6.1 enters the processing of wet electrical dust precipitator 6.2；Flushing water in flushing water pipeline 6.3 into
Enter wet electrical dust precipitator 6.2.
Heat temperature raising discharge unit includes connection flue 7.1, heating system 7.2, steam pipe line 7.3, hydrophobic pipeline
7.4, flue 7.5 and chimney 7.6 are discharged.Wet electrical dust precipitator 6.2 is cold by connection flue 7.1 and heating system 7.2
Fluid inlet connection；The cold fluid outlet of heating system 7.2 is connect by discharging flue 7.5 with chimney 7.6；Steam pipe line
7.3 connect with the thermal fluid inlet of heating system 7.2；The hot fluid outlet ports of hydrophobic pipeline 7.4 and heating system 7.2
Connection.By discharge flue after the flue gas of wet electric treatment enters the heat exchange heating of heating system 7.2 by connection flue 7.1
It is discharged after 7.5 entrance chimneys 7.6；Steam in steam pipe line 7.3 enters after the heat exchange of heating system 7.2 cools down into hydrophobic
Pipeline 7.4.
Embodiment 1: exhaust gas volumn 500000Nm3/ h, sulfur dioxide concentration 2000mg/Nm3, flue gas is by the present embodiment process
After purified treatment, discharge outlet sulfur dioxide concentration≤35mg/Nm3, dust≤5mg/Nm3, NH3≤3mg/Nm3, droplet≤15mg/
Nm3, exiting flue gas is without obvious white plume.
Embodiment 2: exhaust gas volumn 1000000Nm3/ h, sulfur dioxide concentration 2000mg/Nm3, flue gas is by the present embodiment process
After purified treatment, discharge outlet sulfur dioxide concentration≤35mg/Nm3, dust≤5mg/Nm3, NH3≤3mg/Nm3, droplet≤15mg/
Nm3, exiting flue gas is without obvious white plume.
In addition, it should be noted that, the specific embodiments described in this specification, the shape of parts and components are named
Title etc. can be different, and above content is only to structure of the invention example explanation described in this specification.It is all according to
According to equivalence changes or simple change that the invention patent design structure, feature and principle is done, it is included in this hair
In the protection scope of bright patent.Those skilled in the art can do described specific embodiment various
The mode that the modify or supplement or adopt of various kinds is similar substitutes, and without departing from structure of the invention or surmounts present claims
Range defined in book, is within the scope of protection of the invention.
Claims (4)
1. a kind of wet electricity of the ammonia process of desulfurization takes off white minimum discharge system, including ammonia process of desulfurization tower section, concentration cycles part, absorbs and follow
Loop section and water washing cycles part；
Ammonia process of desulfurization tower section includes gas approach, ammonia process desulfuration tower and exhaust pass；The cigarette of gas approach and ammonia process desulfuration tower
The connection of gas entrance；The connection of the exhanst gas outlet of exhaust pass and ammonia process desulfuration tower；
Concentration cycles part includes concentration cycles pipeline one, concentrated circulating pump and concentration cycles pipeline two；Concentration cycles pump inlet
It is connected by concentration cycles pipeline one with ammonia process desulfuration tower；Concentration cycles pump discharge passes through concentration cycles pipeline two and the ammonia process of desulfurization
Tower is connected；
Absorption cycle part includes oxidation cycle case, absorption cycle pipeline one, absorbent recirculation pump and absorption cycle pipeline two；Oxidation
Circulating box connects absorbent recirculation pump by absorption cycle pipeline one；Absorbent recirculation pump connects ammonia process by absorption cycle pipeline two and takes off
Sulphur tower；
Water washing cycles part includes water washing cycles case one, water washing cycles pipeline one, water washing cycles pump and water washing cycles pipeline two；Water
It washes circulating box one and water washing cycles pump is connected by water washing cycles pipeline one；Water washing cycles pump connects ammonia by water washing cycles pipeline two
Method desulfurizing tower；
It is characterized by also including washing cooling condensation portion, wet electricity part and heat temperature raising discharge units；
Washing cooling condensation portion includes water washing cycles case two, washing condensate line one, washing condenser pump, washing condensate line
Two, cool-down condensing device, washing condensate line three, low-temperature circulating water pipeline and high temperature circulation water pipeline；Water washing cycles case two-way
Cross the connection washing condenser pump of washing condensate line one；It washes condenser pump and cool-down condensing device is connected by washing condensate line two
Thermal fluid inlet；The hot fluid outlet ports of cool-down condensing device connect the washing condensation of ammonia process desulfuration tower by washing condensate line three
Layer interface；The cold fluid inlet of low-temperature circulating water pipeline connection cool-down condensing device；The connection cooling condensation of high temperature circulation water pipeline
The cold fluid outlet of device；
Wet electricity part includes net flue and wet electrical dust precipitator；The smoke inlet of wet electrical dust precipitator passes through net flue and outlet cigarette
Road is connected；
Heat temperature raising discharge unit includes connection flue, heating system, steam pipe line, hydrophobic pipeline, discharge flue and cigarette
Chimney；Wet electrical dust precipitator is connected by the cold fluid inlet of connection flue and heating system；The cold flow of heating system
Body outlet is connect by discharging flue with chimney；The connection of the thermal fluid inlet of steam pipe line and heating system；Hydrophobic pipeline
It is connect with the hot fluid outlet ports of heating system.
2. the wet electricity of the ammonia process of desulfurization according to claim 1 takes off white minimum discharge system, it is characterised in that: the ammonia process is de-
Sulphur tower section further includes demister, and demister is mounted in ammonia process desulfuration tower.
3. the wet electricity of the ammonia process of desulfurization according to claim 2 takes off white minimum discharge system, it is characterised in that: the demister
It is three layers, first layer demister, second layer demister, third layer demister are sequentially arranged in ammonia process desulfuration tower from bottom to top.
4. the wet electricity of the ammonia process of desulfurization according to claim 1 takes off white minimum discharge system, it is characterised in that: the wet electricity portion
Dividing further includes flushing water pipeline, and the flushing water inlet of flushing water pipeline and wet electrical dust precipitator connects.
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| CN201910198853.3A CN109925863A (en) | 2019-03-15 | 2019-03-15 | A kind of wet electricity of the ammonia process of desulfurization takes off white minimum discharge system |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7758829B2 (en) * | 2007-12-05 | 2010-07-20 | Alstom Technology Ltd | Process for promoting mercury retention in wet flue gas desulfurization systems |
| CN105854479A (en) * | 2016-04-13 | 2016-08-17 | 广东佳德环保科技有限公司 | Ammonia-process flue gas desulfurization device and method achieving efficient aerosol removal |
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Application publication date: 20190625 |