CN207943897U - A kind of desulfurization wastewater Zero discharging system of the wide load denitration of cooperative achievement - Google Patents
A kind of desulfurization wastewater Zero discharging system of the wide load denitration of cooperative achievement Download PDFInfo
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Abstract
The utility model is related to a kind of desulfurization wastewater Zero discharging systems of the wide load denitration of cooperative achievement, belong to industrial wastewater and waste gas purification environmental protection and energy field.The utility model includes boiler, deduster, air-introduced machine, limestone-gypsum wet desulfuration device, chimney, No.1 flue, No. two flues, No. three flues and water pipe；Boiler is connected to deduster by No.1 flue, deduster is connected to limestone-gypsum wet desulfuration device by No. two flues, limestone-gypsum wet desulfuration device is connected to chimney by No. three flues, economizer, ammonia-spraying grid, SCR denitration reactor and air preheater are sequentially arranged at along the direction of flow of flue gas in No.1 flue, air-introduced machine is mounted on No. two flues, limestone-gypsum wet desulfuration device is connected to atomizer by water pipe, and atomizer is mounted in bypass flue.Have many advantages, such as simple system, energy-saving, collaboration emission reduction, is with a wide range of applications.
Description
Technical field
The utility model is related to a kind of desulfurization wastewater Zero discharging systems of the wide load denitration of cooperative achievement, belong to industrial wastewater
With waste gas purification environmental protection and energy field.
Background technology
Energy resource structure of the China based on coal will not change within the long duration, therefore, control coal-fired flue-gas pollutant
Discharge is an important process of China's control atmosphere pollution.The most widely used flue gas of current coal fired power plant flue gas desulfurization device
Desulfurization technology is Limestone-gypsum Wet Flue Gas Desulfurization Process technology, which has the advantages that efficient, maturation, stablizes, but its by-product is de-
Containing impurity such as a large amount of suspended matter, inorganic ion, heavy metal ion in sulphur waste water, how it is carried out efficient, inexpensive
Processing is the important technological problems currently faced.
On the other hand, selective catalytic reduction（SCR）Denitration technology is most widely used in recent years, most effective coal-fired flue-gas
Denitration technology, but current commercial SCR denitration generally existing operation smoke temperature requirement, generally at 300-420 DEG C, less than this temperature
Degree range operation will lead to catalyst inactivation, this results in partial fuel coal unit that can not run denitration dress in underrun
It sets, and then can not achieve qualified discharge.Therefore, SCR denitration device putting into operation under underrun how is effectively solved the problems, such as,
Also become the important topic in current coal-fired flue gas denitration field.If existing flue gas system can be utilized, the wide load of cooperative achievement is de-
Nitre and desulfurization wastewater zero emission requirement are then of great significance to reduction pollutant process cost, environmental protection.
With the relevant patent of the utility model, such as CN104163535A ---《A kind of device of desulfurization wastewater zero-emission and
Processing method》, it is the flue collector being injected directly into treated desulfurization wastewater by atomizer between air preheater and deduster
It is interior, it evaporates, crystallize under the action of high-temperature flue gas, to realize wastewater zero discharge.But since exhaust gas temperature is relatively low,
The method is more demanding to nozzle atomization effect and flue gas flow field, the problems such as be easy to causeing dust stratification in flue, corrode, and then influences
Unit safety, stable operation.
For another example CN105222114A ---《The low NOx devices of economizer sectional boiler full load and remodeling method》, it is to pass through
By economizer step-by-step arrangement, to meet underload denitration service requirement, but its improvement project amount is larger for active service unit, and by
In must take into consideration oepration at full load overtemperatute, underload test limited extent.
Utility model content
The purpose of the utility model is to overcome above-mentioned deficiencies existing in the prior art, and provide a kind of structure design conjunction
The desulfurization wastewater Zero discharging system of the wide load denitration of cooperative achievement of reason.
The technical scheme in the invention for solving the above technical problem is：The desulfurization of the wide load denitration of the cooperative achievement is useless
Water zero discharge system, it is characterised in that：Including boiler, economizer, bypass flue, bypass flue inlet baffle door, atomizer,
Bypass flue outlet damper door, ammonia-spraying grid, SCR denitration reactor, air preheater, deduster, air-introduced machine, limestone-gypsum are wet
Method desulfurizer, chimney, No.1 flue, No. two flues, No. three flues and water pipe；The boiler passes through No.1 flue with deduster
Connection, the deduster are connected to limestone-gypsum desulphurization system by No. two flues, the Gypsum Wet
Desulfurizer is connected to chimney by No. three flues, the economizer, ammonia-spraying grid, SCR denitration reactor and air preheater along
The direction of flow of flue gas is sequentially arranged in No.1 flue, and the air-introduced machine is mounted on No. two flues, the boiler and province's coal
It is provided with bypass flue import on No.1 flue between device, is arranged on the No.1 flue between the economizer and ammonia-spraying grid
There are bypass flue outlet, one end and the bypass flue inlet communication of the bypass flue, the other end and the side of the bypass flue
Road flue outlet connection, the bypass flue inlet baffle door are mounted on bypass flue import, the bypass flue outlet damper
Door is mounted on bypass flue and exports, and the limestone-gypsum desulphurization system is connected to atomizer by water pipe, the mist
Change nozzle to be mounted in bypass flue.
Compared with prior art, the utility model has the following advantages：It, can cooperative achievement desulfurization wastewater zero by above system
Discharge and the wide load denitration of unit have many advantages, such as simple system, energy-saving, collaboration emission reduction, are with a wide range of applications.
Description of the drawings
Fig. 1 is the desulfurization wastewater Zero discharging system schematic diagram of the wide load denitration of cooperative achievement of the utility model embodiment.
In figure：1- boilers, 2- economizers, 3- bypass flues, 4- bypass flue inlet baffles door, 5- atomizers, by 6-
Road flue outlet baffle door, 7- ammonia-spraying grids, 8-SCR Benitration reactors, 9- air preheaters, 10- dedusters, 11- air-introduced machines, 12-
Limestone-gypsum desulphurization system, 13- chimneys, 14- No.1s flue, No. bis- flues of 15-, No. tri- flues of 16-, 17- water pipes.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Embodiment.
It is shown in Figure 1, it should however be clear that structure, ratio, size etc. depicted in this specification institute accompanying drawings, only matching
The revealed content of specification is closed, so that those skilled in the art understands and reads, being not limited to the utility model can
The qualifications of implementation, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of the utility model can be generated and the purpose that can reach, should all still fall in the utility model institute
In the range of the technology contents of announcement can be covered.Meanwhile if in this specification with reference as "upper", "lower", "left", "right", " in
Between " and " one " etc. term, be merely convenient to being illustrated for narration, rather than to limit the enforceable range of the utility model,
Relativeness is altered or modified, in the case where changing technology contents without essence, when being also considered as the enforceable scope of the utility model.
The desulfurization wastewater Zero discharging system of the wide load denitration of cooperative achievement in the present embodiment, including boiler 1, economizer 2,
Bypass flue 3, bypass flue inlet baffle door 4, atomizer 5, bypass flue outlet damper door 6, ammonia-spraying grid 7, SCR denitration
Reactor 8, air preheater 9, deduster 10, air-introduced machine 11, limestone-gypsum desulphurization system 12, chimney 13, No.1 flue
14,15, No. three flues 16 of No. two flues and water pipe 17；Boiler 1 is connected to deduster 10 by No.1 flue 14, deduster 10 with
Limestone-gypsum desulphurization system 12 is connected to by No. two flues 15, limestone-gypsum desulphurization system 12 and chimney 13
Be connected to by No. three flues 16, economizer 2, ammonia-spraying grid 7, SCR denitration reactor 8 and air preheater 9 along flow of flue gas side
To being sequentially arranged in No.1 flue 14, air-introduced machine 11 is mounted on No. two flues 15, the No.1 between boiler 1 and economizer 2
It is provided with bypass flue import on flue 14, bypass flue is provided on the No.1 flue 14 between economizer 2 and ammonia-spraying grid 7
Outlet, one end and the bypass flue inlet communication of bypass flue 3, the other end and the bypass flue outlet of bypass flue 3 are other
Road chimney intake baffle door 4 is mounted on bypass flue import, and bypass flue outlet damper door 6 is exported mounted on bypass flue, stone
Lime stone-gypsum wet desulfurizer 12 is connected to atomizer 5 by water pipe 17, and atomizer 5 is mounted in bypass flue 3.
The method of the desulfurization wastewater Zero discharging system of the wide load denitration of cooperative achievement in the present embodiment, including walk as follows
Suddenly：
The first step：Part of smoke flows through No.1 flue 14 and is directly entered the progress heat release of economizer 2 after boiler 1 comes out,
Flue gas after heat release enters SCR denitration reactor 8 using ammonia-spraying grid 7 and carries out denitration reaction, the flue gas after denitration reaction into
Enter air preheater 9 to be heated, the flue gas after heating enters deduster 10 and is dusted, and the flue gas after dedusting flows through No. two flues 15
Enter limestone-gypsum desulphurization system 12 by air-introduced machine 11 and carry out desulfurization, the flue gas after desulfurization flows through No. three flues 16
It is discharged into chimney 13；
Second step：Another flue gas flows through No.1 flue 14 and enters bypass by bypass flue import after boiler 1 comes out
Flue 3, the flue gas into bypass flue 3 enter No.1 flue 14 by bypass flue outlet, are passed through by the flue gas of bypass flue 3
It crosses ammonia-spraying grid 7 and enters 8 progress denitration reaction of SCR denitration reactor, the flue gas after denitration reaction enters air preheater 9 and added
Heat, the flue gas after heating enter deduster 10 and are dusted, the flue gas after dedusting flow through No. two flues 15 by air-introduced machine 11 into
Enter limestone-gypsum desulphurization system 12 and carry out desulfurization, the flue gas after desulfurization flows through No. three flues 16 and enters the discharge of chimney 13；
The first step is synchronous with second step to be carried out.
In the present embodiment, when unit normal operation and when needing to handle desulfurization wastewater, bypass flue inlet baffle door 4 is opened
With bypass flue outlet damper door 6, another flue gas flows through No.1 flue 14 and passes through bypass flue import after boiler 1 comes out
Into bypass flue 3, the flue gas into bypass flue 3 enters No.1 flue 14 by bypass flue outlet, passes through bypass flue 3
Flue gas enter SCR denitration reactor 8 by ammonia-spraying grid 7 and carry out denitration reaction, the flue gas after denitration reaction enters air preheater 9
It is heated, the flue gas after heating enters deduster 10 and is dusted, and the flue gas after dedusting flows through No. two flues 15 and passes through air inducing
Machine 11 enters limestone-gypsum desulphurization system 12 and carries out desulfurization, and the flue gas after desulfurization flows through No. three flues 16 and enters chimney
13 discharges, while after the waste water that limestone-gypsum desulphurization system 12 is discharged is flowed through water pipe 17, passing through atomizer 5
It sprays into bypass flue 3, evaporates, crystallizes under the action of high-temperature flue gas, to realize desulfurization wastewater zero-emission.
In the present embodiment, when performing low-load running of machine set, which cannot be satisfied SCR denitration reactor 8, runs smoke temperature requirement, open
Bypass flue inlet baffle door 4 and bypass flue outlet damper door 6, another flue gas flow through No.1 flue after boiler 1 comes out
14 enter bypass flue 3 by bypass flue import, and the flue gas into bypass flue 3 enters No.1 cigarette by bypass flue outlet
Road 14 makes flue gas be mixed with the low-temperature flue gas without ammonia-spraying grid 7, is lifted into the smoke temperature of SCR denitration reactor 8,
Promote the flue gas after smoke temperature and enter SCR denitration reactor 8 and carry out denitration reaction, the flue gas after denitration reaction enter air preheater 9 into
Row heating, the flue gas after heating enter deduster 10 and are dusted, and the flue gas after dedusting flows through No. two flues 15 and passes through air-introduced machine
11, which enter limestone-gypsum desulphurization system 12, carries out desulfurization, and the flue gas after desulfurization flows through No. three flues 16 and enters chimney 13
Discharge, to realize the wide load denitration of unit.
In the present embodiment, when bypass flue 3 or the failure of atomizer 5,4 He of bypass flue inlet baffle door is closed
Bypass flue outlet damper door 6 realizes that on-bne repair is safeguarded.
In the present embodiment, opening for bypass flue inlet baffle door 4 and bypass flue outlet damper door 6 can be adjusted as needed
Degree can close bypass flue inlet baffle door 4 and bypass flue outlet when necessary to control the flue gas flow of bypass flue 3
Baffle door 6 carries out unit on-bne repair maintenance work.
Bypass flue 3 in the present embodiment designs flue gas flow and flue gas flow rate need to meet desulfurization wastewater evaporating completely simultaneously
It is required that with wide load denitration requirement, flue gas flow rate need to meet gas residence time and be not less than 1.0s, specific flue gas flow, flue gas stream
The parameters such as speed, flue size need to carry out accounting determination according to concrete engineering design parameter and boundary condition, be well known in the art
Common sense.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of parts and components is named
Claiming etc. can be different, described in this specification above content is only to the utility model structure example explanation.
The equivalence changes or simple change that all structure, feature and principles according to described in the utility model patent concept are done, are wrapped
It includes in the protection domain of the utility model patent.Those skilled in the art of the present invention can be to described
Specific embodiment does various modifications or additions or substitutes by a similar method, without departing from the knot of the utility model
Structure or beyond the scope defined by this claim, all should belong to the protection range of the utility model.
Claims (1)
1. a kind of desulfurization wastewater Zero discharging system of the wide load denitration of cooperative achievement, it is characterised in that：Including boiler, economizer,
Bypass flue, bypass flue inlet baffle door, atomizer, bypass flue outlet damper door, ammonia-spraying grid, SCR denitration reaction
Device, air preheater, deduster, air-introduced machine, limestone-gypsum desulphurization system, chimney, No.1 flue, No. two flues, No. three cigarettes
Road and water pipe；The boiler is connected to deduster by No.1 flue, the deduster and limestone-gypsum desulphurization system
It is connected to by No. two flues, the limestone-gypsum desulphurization system is connected to chimney by No. three flues, province's coal
Device, ammonia-spraying grid, SCR denitration reactor and air preheater are sequentially arranged at along the direction of flow of flue gas in No.1 flue, described
Air-introduced machine is mounted on No. two flues, and bypass flue import, institute are provided on the No.1 flue between the boiler and economizer
It states and is provided with bypass flue outlet, one end of the bypass flue and bypass on the No.1 flue between economizer and ammonia-spraying grid
Chimney intake is connected to, the other end and the bypass flue outlet of the bypass flue, the bypass flue inlet baffle door peace
Mounted in bypass flue import, the bypass flue outlet damper door is exported mounted on bypass flue, the Gypsum Wet
Desulfurizer is connected to atomizer by water pipe, and the atomizer is mounted in bypass flue.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721730767.5U CN207943897U (en) | 2017-12-13 | 2017-12-13 | A kind of desulfurization wastewater Zero discharging system of the wide load denitration of cooperative achievement |
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| CN201721730767.5U CN207943897U (en) | 2017-12-13 | 2017-12-13 | A kind of desulfurization wastewater Zero discharging system of the wide load denitration of cooperative achievement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107935084A (en) * | 2017-12-13 | 2018-04-20 | 华电电力科学研究院 | A kind of the desulfurization wastewater Zero discharging system and method for the wide load denitration of cooperative achievement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107935084A (en) * | 2017-12-13 | 2018-04-20 | 华电电力科学研究院 | A kind of the desulfurization wastewater Zero discharging system and method for the wide load denitration of cooperative achievement |
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