CN104100986B - A kind of wet electrical dust precipitator and wet desulphurization united water system - Google Patents

A kind of wet electrical dust precipitator and wet desulphurization united water system Download PDF

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Publication number
CN104100986B
CN104100986B CN201410324858.3A CN201410324858A CN104100986B CN 104100986 B CN104100986 B CN 104100986B CN 201410324858 A CN201410324858 A CN 201410324858A CN 104100986 B CN104100986 B CN 104100986B
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water
pipe
overall
wet
electrical dust
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CN104100986A (en
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姬海宏
李晶
王光普
周瑜
周璇
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Huadian Electric Power Research Institute Co Ltd
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Huadian Electric Power Research Institute Co Ltd
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Abstract

The present invention relates to a kind of wet electrical dust precipitator and wet desulphurization united water system.There is presently no a kind of space hold few, energy-saving and cost-reducing wet electrical dust precipitator and wet desulphurization united water system.The present invention includes wet desulphurization device and wet electrical dust precipitator device, it is characterized in: also include overall process water tank, settling tank, gypsum dewatering equipment, desulfurizing waste water processing device, filling pipe, slurry pipe, waste discharge water pipe and delivery pipe, filling pipe is connected on overall process water tank, all connected by feed pipe between wet desulphurization device and overall process water tank and between wet electrical dust precipitator device and overall process water tank, connected by drain pipe between wet electrical dust precipitator device and settling tank, connected by return pipe between settling tank and overall process water tank, slurry pipe one end is connected to overall process water tank bottom, the other end is connected on discharge pipe, delivery pipe is connected on desulfurizing waste water processing device.The space hold of the present invention is few, energy-saving and cost-reducing.

Description

A kind of wet electrical dust precipitator and wet desulphurization united water system
Technical field
The present invention relates to a kind of wet electrical dust precipitator and wet desulphurization united water system, belong to environmental technology field.
Background technology
Although the Eleventh Five-Year Plan period China environmental protection achieves actively progress; but environment situation is the severeest; energy resource structure based on coal causes Air Pollutant Emission total amount to remain high; city atmospheric environment situation is the severeest; regional atmosphere polluting problem becomes clear day by day; simultaneously along with the issuing and implementation of " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011), thermal power plant's smoke dust discharge concentration is proposed requirements at the higher level.For new thermal power plant pollutant emission standard, the problem that active service fired power generating unit major part is faced with Retrofit on electrostatic precipitator.Modification scheme at wet type desulfurizing added downstream wet electrical dust precipitator occupies considerable part ratio in transformation field at present, becomes the main trend of Retrofit on electrostatic precipitator.
What application was more at present is stainless steel polar plate wet cottrell, its powerful corona field utilizing needling electrode to be formed makes gas ionization, dust, droplet particle etc. obtain electronics and charged, electric field force, the impact interception of charged water spray, absorption coalescence jointly act under charged particle become trapped in dust collecting electrode, and in dust collecting electrode, form continuous print moisture film by nozzle spray, the dust of trapping is flushed in ash bucket, then discharges with water.
The wet electrical dust precipitator of current relatively main flow has the water circulation system of self and mainly includes cyclic water tank, water circulating pump, discharge casing, draining pump, alkali storage tank, alkali dosing pump and water supply and sewerage pipeline etc..Participating in the water rinsed, the water yield wherein containing dust fractions enters discharge casing, after addition NaOH solution carries out pH value adjustment, drains into outward desulphurization system.Its remaining water enters cyclic water tank, after pH value adjusts, as wet cottrell recirculated water, refluxes and uses to nozzle.The water yield of outer row loss, is supplemented separately by industry water.There is problems of needing to add alkali to neutralize, and system is more complicated, takes up room big;Pump is more, and power consumption is big, and fault rate is of a relatively high.
Publication date is on 04 24th, 2013, in the Chinese patent of Publication No. CN103056031A, disclosing the grey water circulation processing system of a kind of wet electrical dust precipitator, the grey water circulation processing system of this wet electrical dust precipitator includes: for collecting the ash water tank of the buck that wet electrical dust precipitator is discharged;Supply branch road, including extra feed tank, flush water pump;The water inlet of flush water pump connects extra feed tank, and the outlet of flush water pump connects the spraying mechanism of wet electrical dust precipitator by water-supply-pipe;Circulation branch road, including cyclic water tank, water circulating pump, equipped with the liquor box of aqueous slkali and automatic filter;The outlet of ash water tank and the outlet of liquor box connect cyclic water tank respectively, the water inlet of water circulating pump connects cyclic water tank, the outlet of water circulating pump connects the water inlet of automatic filter, the outlet of automatic filter connects the spraying mechanism of wet electrical dust precipitator by water-supply-pipe, the structure of the grey water circulation processing system of this wet electrical dust precipitator is complicated, and can not effectively combine with wet desulfurization system.
In sum, there is presently no a kind of simple in construction, space hold is few, energy-saving and cost-reducing wet electrical dust precipitator and wet desulphurization united water system.
Summary of the invention
It is an object of the invention to overcome above-mentioned deficiency present in prior art, and a kind of reasonable in design is provided, space hold is few, energy-saving and cost-reducing, need not volume exogenously added alkali, unify desulfurization and the water supplement port of wet electrical dust precipitator and discharge of wastewater mouth, decreased the usage amount of pump, reduce wet electrical dust precipitator and the wet desulphurization united water system of fault rate.
nullThe present invention solves the problems referred to above and be the technical scheme is that this wet electrical dust precipitator and wet desulphurization united water system include wet desulphurization device and wet electrical dust precipitator device,Its construction features is: also include overall process water tank、Settling tank、Gypsum dewatering equipment、Desulfurizing waste water processing device、Filling pipe、Feed pipe、Drain pipe、Discharge pipe、Return pipe、Slurry pipe、Waste discharge water pipe and delivery pipe,Described filling pipe is connected on overall process water tank,All connected by feed pipe between described wet desulphurization device and overall process water tank and between wet electrical dust precipitator device and overall process water tank,Connected by drain pipe between described wet electrical dust precipitator device and settling tank,Connected by return pipe between described settling tank and overall process water tank,Connected by discharge pipe between described settling tank and gypsum dewatering equipment,One end of described slurry pipe is connected to the bottom of overall process water tank,The other end of this slurry pipe is connected on discharge pipe,Connected by waste discharge water pipe between described gypsum dewatering equipment and desulfurizing waste water processing device,Described delivery pipe is connected on desulfurizing waste water processing device;Described overall process water tank is for providing fresh water (FW) to wet desulphurization device and wet electrical dust precipitator device, and passes through the bottom of overall process water tank to gypsum dewatering equipment periodic exhaustion sediment slurry;Described wet desulphurization device self maintains water balance, and described wet electrical dust precipitator device carries through flue gas and maintains water balance to settling tank draining;Described settling tank is for arranging clear water to overall process water tank, and sedimentation serosity is delivered to gypsum dewatering equipment, carries out processing discharge, it is achieved the water balance of whole system in the discharge of wastewater after gypsum dewatering equipment is dehydrated to desulfurizing waste water processing device.So that the structure of the present invention simplifies, reduce space hold, energy-saving and cost-reducing, it is not necessary to volume exogenously added alkali, system are simple, unified desulfurization and the water supplement port of wet electrical dust precipitator and discharge of wastewater mouth, easy to control, decrease the usage amount of pump, reduce fault rate.
As preferably, the feed water inlet of overall process water tank of the present invention is positioned at medium position.
As preferably, filling pipe of the present invention is connected to the top of overall process water tank.
The present invention compared with prior art, has the following advantages and effect: needing of efficiently solving that existing wet electrical dust precipitator water circulation system exists adds that alkali neutralizes, system is more complicated, it is big to take up room, pump is more, and power consumption is big, the problem that fault rate is of a relatively high.Full factory water system carries out moisturizing to overall process water tank, and overall process water tank Main Function is by moisturizing distribution, controls each several part rate of water make-up, dilutes wet electrical dust precipitator device recirculated water, overall process water tank periodically by bottom discharge sediment slurry to gypsum dewatering equipment.The Main Function of settling tank is to settle from the draining of wet electrical dust precipitator device, isolate denseer gypsum slurries, clear water is made to recycle, the clear water that settling tank gives off returns overall process water tank and recycles, the isolated serosity with gypsum particle of settling tank is exhausted directly at desulfurated plaster dehydration device be dehydrated, and the isolated serosity with gypsum particle of settling tank discharges usually intermittent discharge.
In the present invention, wet desulphurization device and the moisturizing of wet electrical dust precipitator device and discharge of wastewater are unified, and simplify whole system.Simplify desulfurization, the water circulation system of wet electrical dust precipitator, it is easy to transformation;Reduce floor space, the transformation under the most existing thermal power plant compact layout;Eliminate extra dosing, provide cost savings, reduce secondary pollution risk;Desulfurization and wet electrical dust precipitator water circulation system relatively decreases the consumption of pump, reduces fault rate, has energy-saving and cost-reducing effect simultaneously;Evade wet electrical dust precipitator waste water and affect the risk of desulfurization level weighing apparatus to desulfurization discharge.
Accompanying drawing explanation
Fig. 1 is wet electrical dust precipitator and the structural representation of wet desulphurization united water system in the embodiment of the present invention.
In figure: wet desulphurization device 1, wet electrical dust precipitator device 2, overall process water tank 3, settling tank 4, gypsum dewatering equipment 5, desulfurizing waste water processing device 6, filling pipe 7, feed pipe 8, drain pipe 9, discharge pipe 10, return pipe 11, slurry pipe 12, waste discharge water pipe 13, delivery pipe 14.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following example are explanation of the invention and the invention is not limited in following example.
Embodiment.
Seeing Fig. 1, the wet electrical dust precipitator in the present embodiment and wet desulphurization united water system include wet desulphurization device 1, wet electrical dust precipitator device 2, overall process water tank 3, settling tank 4, gypsum dewatering equipment 5, desulfurizing waste water processing device 6, filling pipe 7, feed pipe 8, drain pipe 9, discharge pipe 10, return pipe 11, slurry pipe 12, waste discharge water pipe 13 and delivery pipe 14.
Filling pipe 7 in the present embodiment is connected on overall process water tank 3, all connected by feed pipe 8 between wet desulphurization device 1 and overall process water tank 3 and between wet electrical dust precipitator device 2 and overall process water tank 3, under normal circumstances, feed pipe 8 includes a total feed pipe and two feed pipes, one end of a piece total feed pipe is connected on overall process water tank 3, one end of two feed pipes is both connected on the other end of total feed pipe, and the other end of two feed pipes is connected to wet desulphurization device 1 and wet electrical dust precipitator device 2.
Connected by drain pipe 9 between wet electrical dust precipitator device 2 and settling tank 4 in the present embodiment, connected by return pipe 11 between settling tank 4 and overall process water tank 3, connected by discharge pipe 10 between settling tank 4 and gypsum dewatering equipment 5, one end of slurry pipe 12 is connected to the bottom of overall process water tank 3, the other end of this slurry pipe 12 is connected on discharge pipe 10, being connected by waste discharge water pipe 13 between gypsum dewatering equipment 5 and desulfurizing waste water processing device 6, delivery pipe 14 is connected on desulfurizing waste water processing device 6.
Overall process water tank 3 in the present embodiment is for providing fresh water (FW) to wet desulphurization device 1 and wet electrical dust precipitator device 2, and passes through the bottom of overall process water tank 3 to gypsum dewatering equipment 5 periodic exhaustion sediment slurry.Wet desulphurization device 1 is carried by flue gas, gypsum dehydration and desulfurizing waste water processing device 6 discharge maintain own level weighing apparatus.Wet electrical dust precipitator device 2 carries through flue gas and maintains water balance to settling tank 4 draining.Settling tank 4 is for arranging clear water to overall process water tank 3, and sedimentation serosity is delivered to gypsum dewatering equipment 5, carries out processing discharge, it is achieved the water balance of whole system in the discharge of wastewater after gypsum dewatering equipment 5 is dehydrated to desulfurizing waste water processing device 6.
Under normal circumstances, the feed water inlet of the overall process water tank 3 in the present embodiment is positioned at medium position, and filling pipe 7 is connected to the top of overall process water tank 3.
Full factory water system is to overall process water tank 3 moisturizing, overall process water tank 3 provides fresh water (FW) to wet desulphurization device 1 and wet electrical dust precipitator device 2, wet desulphurization device 1 self maintains water balance, clear water is arranged to overall process water tank 3 by wet electrical dust precipitator device 2 draining through settling tank 4, sedimentation serosity carries out processing discharge through desulfurizing waste water processing device 6 after delivering to gypsum dewatering equipment 5 dehydration, it is achieved wet desulphurization device 1 and the unified associating water circulation system of wet electrical dust precipitator device 2 moisturizing draining.Simplify desulfurization, the water circulation system of wet electrical dust precipitator;Reduce and take up an area;Eliminate dosing, cost-effective, reduce secondary pollution risk;Reduce the consumption of pump, reduce fault rate, energy-saving and cost-reducing;Evade the risk destroying desulfurization level weighing apparatus.
Overall process water tank 3 Main Function in the present embodiment is by moisturizing distribution, controls each several part rate of water make-up, dilutes wet electrical dust precipitator device 2 recirculated water.Overall process water tank 3 periodically by bottom discharge sediment slurry to gypsum dewatering equipment 5.Settling tank 4 Main Function settles from wet electrical dust precipitator device 2 draining, isolates denseer gypsum slurries, makes clear water recycle.The clear water that settling tank 4 gives off returns overall process water tank 3 and recycles.The isolated serosity with gypsum particle of settling tank 4 is exhausted directly at desulfurated plaster dehydration device 5 be dehydrated.The isolated serosity with gypsum particle of settling tank 4 discharges as intermittent discharge.Wet desulphurization device 1 and wet electrical dust precipitator device 2 moisturizing and discharge of wastewater are unified, and simplify whole system.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components, be named title etc. can be different, and the above content described in this specification is only to present configuration example explanation.All equivalence changes done according to structure, feature and the principle described in inventional idea of the present invention or simple change, be all included in the protection domain of patent of the present invention.Described specific embodiment can be made various amendment or supplements or use similar mode to substitute by those skilled in the art; without departing from the structure of the present invention or surmount scope defined in the claims, protection scope of the present invention all should be belonged to.

Claims (3)

  1. null1. a wet electrical dust precipitator and wet desulphurization united water system,Including wet desulphurization device and wet electrical dust precipitator device,It is characterized in that: also include overall process water tank、Settling tank、Gypsum dewatering equipment、Desulfurizing waste water processing device、Filling pipe、Feed pipe、Drain pipe、Discharge pipe、Return pipe、Slurry pipe、Waste discharge water pipe and delivery pipe,Described filling pipe is connected on overall process water tank,All connected by feed pipe between described wet desulphurization device and overall process water tank and between wet electrical dust precipitator device and overall process water tank,Connected by drain pipe between described wet electrical dust precipitator device and settling tank,Connected by return pipe between described settling tank and overall process water tank,Connected by discharge pipe between described settling tank and gypsum dewatering equipment,One end of described slurry pipe is connected to the bottom of overall process water tank,The other end of this slurry pipe is connected on discharge pipe,Connected by waste discharge water pipe between described gypsum dewatering equipment and desulfurizing waste water processing device,Described delivery pipe is connected on desulfurizing waste water processing device;Described overall process water tank is for providing fresh water (FW) to wet desulphurization device and wet electrical dust precipitator device, and passes through the bottom of overall process water tank to gypsum dewatering equipment periodic exhaustion sediment slurry;Described wet desulphurization device self maintains water balance, and described wet electrical dust precipitator device carries through flue gas and maintains water balance to settling tank draining;Described settling tank is for arranging clear water to overall process water tank, and sedimentation serosity is delivered to gypsum dewatering equipment, carries out processing discharge, it is achieved the water balance of whole system in the discharge of wastewater after gypsum dewatering equipment is dehydrated to desulfurizing waste water processing device.
  2. Wet electrical dust precipitator the most according to claim 1 and wet desulphurization united water system, it is characterised in that: the feed water inlet of described overall process water tank is positioned at medium position.
  3. Wet electrical dust precipitator the most according to claim 1 and wet desulphurization united water system, it is characterised in that: described filling pipe is connected to the top of overall process water tank.
CN201410324858.3A 2014-07-09 2014-07-09 A kind of wet electrical dust precipitator and wet desulphurization united water system Active CN104100986B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06165912A (en) * 1992-11-30 1994-06-14 Mitsubishi Heavy Ind Ltd High performance stack gas desulfurizing method
JPH10216476A (en) * 1997-01-31 1998-08-18 Kawasaki Heavy Ind Ltd Waste gas treatment and apparatus therefor
JP2007260619A (en) * 2006-03-29 2007-10-11 Hitachi Plant Technologies Ltd Method and apparatus for treating exhaust gas
CN102716639A (en) * 2012-07-20 2012-10-10 中电投远达环保工程有限公司 High-efficiency wet-type electric dust removal and desulfuration system and process
CN103055644A (en) * 2012-12-31 2013-04-24 福建龙净环保股份有限公司 Wet-type electric dust removal system after wet desulphurization
CN103056031A (en) * 2012-12-31 2013-04-24 福建龙净环保股份有限公司 Ash water circulation treatment system of wet-type electric dust remover
CN103691296A (en) * 2013-12-12 2014-04-02 上海龙净环保科技工程有限公司 Water circulating system and method of PM2.5 flue gas treatment tower

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06165912A (en) * 1992-11-30 1994-06-14 Mitsubishi Heavy Ind Ltd High performance stack gas desulfurizing method
JPH10216476A (en) * 1997-01-31 1998-08-18 Kawasaki Heavy Ind Ltd Waste gas treatment and apparatus therefor
JP2007260619A (en) * 2006-03-29 2007-10-11 Hitachi Plant Technologies Ltd Method and apparatus for treating exhaust gas
CN102716639A (en) * 2012-07-20 2012-10-10 中电投远达环保工程有限公司 High-efficiency wet-type electric dust removal and desulfuration system and process
CN103055644A (en) * 2012-12-31 2013-04-24 福建龙净环保股份有限公司 Wet-type electric dust removal system after wet desulphurization
CN103056031A (en) * 2012-12-31 2013-04-24 福建龙净环保股份有限公司 Ash water circulation treatment system of wet-type electric dust remover
CN103691296A (en) * 2013-12-12 2014-04-02 上海龙净环保科技工程有限公司 Water circulating system and method of PM2.5 flue gas treatment tower

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