CN105013276B - A kind of novel coal-fired boiler smoke treatment method - Google Patents
A kind of novel coal-fired boiler smoke treatment method Download PDFInfo
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- CN105013276B CN105013276B CN201510328997.8A CN201510328997A CN105013276B CN 105013276 B CN105013276 B CN 105013276B CN 201510328997 A CN201510328997 A CN 201510328997A CN 105013276 B CN105013276 B CN 105013276B
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- flue
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Abstract
The present invention relates to a kind of novel coal-fired boiler smoke treatment method, it includes dedusting denitrating system, dusting and desulfuring system, wastewater treatment and reclaiming system and pickling system, wherein, described dedusting denitrating system includes flue, flue passes through primary filter, lower airflow fence, lower locating device, upper airflow fence and upper locator successively from top to bottom, every piece of lower module being arranged on lower airflow fence uniformly invades bubble in flue gas, and module ends are fixed with lower cross card article；Steam backwashing system is connected with the sidepiece of flue；Ammonia adding System is additionally provided with the sidepiece of flue；Dusting and desulfuring system is connected with the port of export of flue, it is filtered to flue dust and repeatedly sprayed；Wastewater treatment and reclaiming system are connected with the waste water outlet side of flue, waste water is alkalized, and discharges.Novel coal-fired boiler smoke and dust treatment new departure of the present invention has dedusting denitration, desulfurized effect, improves catalyst efficiency 40% 50% and extends service life.
Description
Technical field
The present invention relates to coal-burning boiler field, more particularly to a kind of novel coal-fired boiler smoke treatment method.This new side
Case applied technical field has：(1) dedusting denitration technology；(2) dust-removal and desulfurizing technology；(3) automatic control technology (4) screen technology；(5) give up
Water process and reuse technology；(6) pickling technology.
Background technology
According to the statistics existing coal-burning boiler in China more than 50,000, substantial amounts of NOx, SOx, COx pernicious gas and cigarette are discharged daily
Dirt particulate matter, the serious environment that pollutes form haze and acid rain, also seriously endanger health and life security, be to control,
Compel under eyebrow.China is a big coal country, is the big countries such as production steel, production cement, production glass again, not burning these enterprises of coal can fall
Close, also have a strong impact on the national economic development.It is also limited that coal, which becomes vapour, also to handle the smoke and dust treatment problem that coal changes vapour.It is existing
Coal smoke administers complete set of equipments, and occupied ground is big, complex process, and price is high, and investment is big, and production cost is high, and product price is high.
Necessarily affect the development of these enterprises.China is that import is leaned on by the deficient country about 2/3 of an air-flow, just in case supply interrupts, and can
Cause the influence that can not be estimated.
Therefore, the smoke contamination for solving the problems, such as pollution that caused by coal burning is the technical problem of existing coal-burning boiler.
In view of drawbacks described above, creator of the present invention obtains this creation finally by prolonged research and practice.
The content of the invention
It is an object of the invention to provide a kind of novel coal-fired boiler smoke treatment method, to overcome above-mentioned technology to lack
Fall into.
To achieve the above object, the present invention carries a kind of novel coal-fired boiler smoke treatment method, and it includes dedusting denitration system
System, dusting and desulfuring system, wastewater treatment and reclaiming system and pickling system, wherein,
Described dedusting denitrating system includes flue, and flue is from top to bottom successively by primary filter, lower airflow fence, lower positioning
Device, upper airflow fence and upper locator, every piece of lower module being arranged on lower airflow fence uniformly invade bubble in flue gas, and module ends are used
Lower cross card article is fixed；
Steam backwashing system is connected with the sidepiece of flue；Ammonia adding System is additionally provided with the sidepiece of flue；
Dusting and desulfuring system is connected with the port of export of flue, it carries out multiple times of filtration to flue dust and repeatedly sprayed；
Wastewater treatment and reclaiming system are connected with the waste water outlet side of flue, waste water is alkalized, and discharges；
Pickling system is additionally provided with the output end of waste water, filtered processing is entered after being mixed with acid solution to spray thrower and filter screen
Row waste water circulation and processing, it is grouped pickling, discharge.
Further, fume gases are discharged from economizer, the sidepiece of low head are entered by electric butterfly valve, in low head
Electric butterfly valve is set, tap water spray head is provided with before valve, by the effect of tap water spray head, cinder is discharged into filter residue pond.
Further, the described filter screen that goes out is formed by the compacting of skeleton filter screen, and has counter-flush to need aperture to cut to work as
Particulate matter, primary filter include the domain of lower end and are arranged on the skeleton of domain upper end.
Further, the top of upper module is provided with cross card article；Double door is additionally provided with the sidepiece of flue；
The top of flue is provided with upper cover, and end socket outlet is provided with electric butterfly valve.
Further, described dusting and desulfuring system includes two booster fans for being arranged on upper cover exit；Increasing
First group of spray thrower, second group of spray thrower in the same direction and half overlapping shirt rim taper filter in the same direction are installed on the horizontal flue of pressure fan
Net；An inversely spraying device is provided with the upper end of flue；One group of end tapered end is inversely spraying device；One mist ball is topmost installed
The network of rivers is reclaimed, both ends are both needed to fill spray thrower.
Further, wastewater treatment and reclaiming system are connected with the waste water outlet side of flue, waste water is from chimney bottom stream
Going out, water temperature is down to 45 DEG C or so through double pipe heat exchanger first, healed water makees boiler replenishing water, and waste water enters regulating reservoir, to
Moisturizing uses most simple automatic control float-controlled valve moisturizing, water teletransmission thermometer in pond, and main pipeline is provided with distance-transmission pressure gauge, flow
Meter, PH regulating reservoirs；
Dosing pump, alkali lye NAOH, solution alkali bucket are used, regulating reservoir is provided with 2 immersible pumps, 2 accurate filters, recoil
Wash dirt and enter mummifying pool, be provided with bypass water softener in Trunk Line, recirculated water is remained demineralized water.
Further, in described pickling system, waste water flows into wastewater disposal basin from chimney bottom, enters accurate mistake through immersible pump
Filter, enter each spray thrower, filter screen through venturi mixer, blender negative pressure terminates sour bucket；Packet carries out pickling from top to bottom.
Further, described steam backwashing system, it includes bucket, and the intubation upper end of bucket is provided with valve,
Steam is discharged by the blender and steam pipe of bucket upper end.
Further, described Ammonia adding System, it includes air-introduced machine, venturi mixer, dosing pump and ammoniacal liquor storage tank, on
An element is stated to be sequentially connected；The electronic dish valve that ammonia gas mixture exports from end socket enters Ammonia adding System.
Compared with prior art the beneficial effects of the present invention are：The novel coal-fired boiler smoke and dust treatment of the present invention is newly square
Case (1) has dedusting denitration, desulfurized effect, and indices are superior to the recent standard that the countries concerned issue.
(2) SCR reactors are corresponding with economizer is arranged in space, and washing time is short, does not influence boiler operatiopn；
(3) innovative measure is optimized to SCR reactors, improves catalyst efficiency 40%-50% and extend use
Life-span；
(4) new place is not take up, is most economical method using flue dedusting denitration sulfur removal technology, some capital equipments,
Being not required to replacing can be long-term use of；
(5) maintenance is extremely convenient, and the time is short, can be carried out under not blowing out operating mode；
(6) recycle-water and waste heat can reduce operating cost；
(7) expected purpose can be achieved completely, administered for coal smoke, open a new way；With more preferable economy
Benefit, more far-reaching social benefit, environmental benefit are to be difficult to estimate；
(8) the new and innovative scheme, all kinds of size coal-burning boiler flue dust be able to can all be administered, domestic and international market is wide
Wealthy, business opportunity is unlimited；Economic benefit competitiveness is strong, and revenue opportunities are improved for manufacturer；
A lot of money can be saved by substituting the deduster of cloth bag complex process and its accessory system with primary filter；Positioned with water conservancy diversion grid module
Method alternative module and ranking method, can improve catalytic efficiency 40%-50%；Flue gas downstream is substituted with flue gas adverse current operation method to run
Method；Easy cleaning, easy-to-discharge slag；Moist desulfurizing tower method is substituted with flue dust-removal and desulfurizing method, is saved money more, the life-span is longer, and maintenance is more square
Just.
Brief description of the drawings
Fig. 1 is a kind of structural representation of novel coal-fired boiler smoke treatment method of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the forgoing and additional technical features and advantages are described in more detail.
Referring to shown in Fig. 1, it is the structural representation of novel coal-fired boiler smoke and dust treatment new departure of the present invention, wherein
Including dedusting denitrating system, dusting and desulfuring system, wastewater treatment and reclaiming system and pickling system.
Dedusting mainly has two kinds of dry filtration dust removing and wet method filtration dedusting, and the particle diameter for removing particulate matter as needed will
Ask, from different pore size filter screen.
Denitration principle：Nitrogen oxides in effluent (NOx), reducing agent ammonia (NH is utilized3), it is reduced under catalyst action
Nitrogen (N2) and water (H2O)。
Desulfurization principle：Sulfide (SOx) in flue gas is dissolved in the water to be formed sulfuric acid (sulfurous acid) again with alkaline water
With formation sulfate.
Dedusting denitrating system in the embodiment of the present invention, including flue, fume gases are discharged from economizer 20, warp
Cross electric butterfly valve 21 and enter the primary filter 19 of low head 22, electric butterfly valve is set in the outlet pipe section of low head 22, is used as deslagging, before valve
Tap water spray head 23 is provided with, by the wash-out valve of tap water spray head 23, is backwashed with steam and cinder is discharged into filter residue pond 24
In.
Flue dust enters in SCR reactors, from bottom to top successively by primary filter 19, lower airflow fence locator 18, upper water conservancy diversion
Grid locator 14, the every piece of lower module 17 being arranged on lower airflow fence 18 uniformly invade bubble in flue gas, the lower cross of module ends
Card article 16 is fixed.
In the present embodiment, primary filter 19 is formed for a band edge by skeleton filter screen and working net compacting, and has recoil work(
The particulate matter in aperture can be needed to retain, in the present embodiment, primary filter 19 justifies composite web with including the old name for the Arabian countries in the Middle East on band installation side
Flue gas is provided with cross card article fixator 12 on the top of upper module 13 by upper airflow fence 14, upper module 13；
Double door 10 is additionally provided with the side of SCR reactors, or single open-door.
Upper cover 11 is provided with the top of SCR reactors, end socket outlet is provided with electric butterfly valve.
Steam backwashing system is connected with the outlet of SCR reactors, including bucket 44, the intubation in bucket 44
Upper end is provided with valve, and blender 45 and steam pipe 46 of the steam Jing Guo the upper end of bucket 44 mix water gas and enter SCR reactors
Backwashed in the end socket of top.
Be additionally provided with Ammonia adding System in the lower end of SCR reactors, including air-introduced machine 41, venturi mixer 43,
Dosing pump 42 and ammoniacal liquor storage tank 40, above-mentioned each element are sequentially connected；Ammonia gas mixture goes out from the electronic dish valve of low head import
Mouth pipe enters in low head.
Present invention additionally comprises dusting and desulfuring system, and two booster fans 39 are provided with the outlet header of upper cover 11,
It is standby each other；One group of spray thrower in the same direction is installed on the horizontal flue of booster fan and inversely spraying device 50 and two and half is overlapping
Shirt rim conical screen 49, it can successively be installed in the vertical section of flue and include spray thrower 48 and filter screen 47,2-3 can be equally installed
Group；Two mist pearl recovery water screens are topmost installed, both ends are both needed to fill spray thrower.
Said structure is applicable chimney internal diameter and is more than 1.2 meters of coal-burning boiler, and to less than 1.1 meters internal diameter boilers, then Datong District
Small difference, separately make design treatment depending on concrete condition.
Wastewater treatment and reclaiming system are connected with the waste water outlet side of flue, waste water flows out from chimney bottom, passed through first
Double pipe heat exchanger 37 makes water temperature be down to 45 DEG C or so, and healed water makees boiler replenishing water, and waste water enters regulating reservoir 36, mended into pond
Water uses most simple automatic control float-controlled valve moisturizing 38, water teletransmission thermometer 34, and the Trunk Line of measuring pump 33 is provided with distance-transmission pressure gauge
26, flowmeter 27, PH instrument 30.Using dosing pump 33, alkali bucket 32, the teletransmission PH instrument 30 of regulating reservoir 36 is provided with 2 immersible pumps 35, each other
Standby, 2 accurate filters 25 are standby each other, and backwash dirt enters mummifying pool 29, are provided with bypass water softener 28 in Trunk Line, make
Recirculated water remains demineralized water.
Pickling system is additionally provided with the output end of waste water, waste water flows into wastewater disposal basin 51 from chimney bottom, through immersible pump 52
Into accurate filter 55, enter each pickling valve through venturi mixer 54, packet from top to bottom carries out pickling.Blender negative pressure
Terminate sour bucket 53.
To dusting and desulfuring system major function device design requirement
(1) to the requirement of shirt rim conical screen：1. material wants acid and alkali-resistance；It is 2. sturdy and durable；3. service life is grown；4. 5 solid points
It is fixed firm；5. filter screen divides working net and skeleton is repressed forms；6. effective filtration area ＞ 1.2-1.5 times flues cross section
Product；7. shirt rim width is more than space distance；8. every from top to down group of aperture of filter screen is ascending.9. according to boiler model and correspondingly
Flue internal diameter, by product approval seriation.
(2) mist pearl water conical screen to be reclaimed, filters effective area ＞ 1.5-2.0 times flue cross-sectional areas, aperture is smaller, its
He requires identical with (1), and it is principle that chimney smooth gas discharge can be made after adapted, and both ends are all provided with spray thrower and are used as pickling.
(3) spray thrower requirement：1. jet diameters are 200 millimeters；2. spray area≤flue cross section；3. each knot
Structure size is identical, from different aperture of filter screen and sprinkling cambered surface；4. water discharge density, highly controlled by screen and each regulating valve
System.
(4) water-proof CCD camera, water proof lamp, each control monitoring sample point, deployed to ensure effective monitoring and control of illegal activities implementation by professional
(5) each regulating valve of chimney all concentrates on 1.4 meters of height, coordinates screen regulation and control.
(6) all electric autocontrol instrument and meters all concentrate on control room.
Presently preferred embodiments of the present invention is the foregoing is only, is merely illustrative for invention, and it is nonrestrictive.
Those skilled in the art understands, can carry out many changes to it in the spirit and scope that invention claim is limited, and changes,
It is even equivalent, but fall within protection scope of the present invention.
Claims (9)
1. a kind of novel coal-fired boiler smoke treatment method, it is characterised in that it includes dedusting denitrating system, dust-removal and desulfurizing system
System, wastewater treatment and reclaiming system and pickling system, wherein,
Described dedusting denitrating system includes flue, flue from top to bottom successively by primary filter, lower airflow fence, lower locating device,
Upper airflow fence and upper locator, every piece of lower module being arranged on lower airflow fence uniformly invades bubble in flue gas, under module ends are used
Cross card article is fixed；
Steam backwashing system is connected with the sidepiece of flue；Ammonia adding System is additionally provided with the sidepiece of flue；
Dusting and desulfuring system is connected with the port of export of flue, it is filtered to flue dust and repeatedly sprayed；
Wastewater treatment and reclaiming system are connected with the waste water outlet side of flue, waste water is alkalized, and discharges；
Pickling system, filtered and packet pickling, discharge are additionally provided with the output end of waste water.
2. a kind of novel coal-fired boiler smoke treatment method according to claim 1, it is characterised in that fume gases are from province
Discharged in coal device, the sidepiece of low head is entered by electric butterfly valve, electric butterfly valve is set in low head, running water is provided with before valve
Shower nozzle, by the effect of tap water spray head, cinder is discharged into filter residue pond.
A kind of 3. novel coal-fired boiler smoke treatment method according to claim 2, it is characterised in that described primary filter
Formed by working net and the compacting of skeleton filter screen, and there is counter-flush to need the particulate matter in aperture to retain, primary filter includes lower end
Domain and be arranged on the skeleton of domain upper end.
4. a kind of novel coal-fired boiler smoke treatment method according to claim 2, it is characterised in that on the top of upper module
End is provided with cross card article fixator；Double door is additionally provided with the sidepiece of flue；The top of flue is provided with upper cover,
End socket outlet is provided with electric butterfly valve.
5. a kind of novel coal-fired boiler smoke treatment method according to claim 4, it is characterised in that described dedusting takes off
Sulphur system includes being arranged on two booster fans in upper cover exit；First group is provided with the horizontal flue of booster fan
Spray thrower in the same direction and the first half overlapping shirt rim conical screens, both install 2-3 groups and half overlapping shirt rim conical screen successively；
The upper end of flue is provided with an inversely spraying device；One group of end tapered end is inversely spraying device；One mist ball recovery is topmost installed
The network of rivers, both ends are both needed to fill spray thrower.
6. a kind of novel coal-fired boiler smoke treatment method according to claim 4, it is characterised in that in the waste water of flue
Outlet side is connected with wastewater treatment and reclaiming system, and waste water flows out from chimney bottom, drops water temperature through double pipe heat exchanger first
To 45 DEG C or so, healed water makees boiler replenishing water, and waste water enters regulating reservoir, and into pond, moisturizing is using most simple automatic control float-controlled valve benefit
Water, water teletransmission thermometer, water Trunk Line are provided with distance-transmission pressure gauge, flowmeter, pH instrument；
Using dosing pump, alkali lye storage drum regulation pH, regulating reservoir is provided with 2 immersible pumps, 2 accurate filters, backwashes dirt
Mummifying pool is discharged into, bypass water softener is provided with Trunk Line, recirculated water is remained demineralized water.
A kind of 7. novel coal-fired boiler smoke treatment method according to claim 6, it is characterised in that described pickling system
In system, waste water flows into wastewater disposal basin from chimney bottom, enters accurate filter through immersible pump, enters each pickling through venturi mixer
Valve, blender negative pressure terminate sour bucket；Packet carries out pickling from top to bottom.
8. a kind of novel coal-fired boiler smoke treatment method according to claim 2, it is characterised in that described steam is anti-
Rinse-system, it includes bucket, and valve is provided with the intubation upper end of bucket, and steam passes through the blender and steam of bucket upper end
Pipe is discharged.
A kind of 9. novel coal-fired boiler smoke treatment method according to claim 8, it is characterised in that described ammonification system
System, it includes air-introduced machine, venturi mixer, dosing pump and ammoniacal liquor storage tank, and above-mentioned each element is sequentially connected；Ammonia gas mixture from
Enter Ammonia adding System at the electronic dish valve outlet of low head outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510328997.8A CN105013276B (en) | 2015-06-16 | 2015-06-16 | A kind of novel coal-fired boiler smoke treatment method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510328997.8A CN105013276B (en) | 2015-06-16 | 2015-06-16 | A kind of novel coal-fired boiler smoke treatment method |
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| CN105013276B true CN105013276B (en) | 2018-04-03 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219329B (en) * | 2007-09-27 | 2010-06-16 | 中电投远达环保工程有限公司 | Flue gas denitrating technique with preposed whirlwind beforehand dust removal SCR |
| CN101637700B (en) * | 2009-08-14 | 2012-10-03 | 中电投远达环保工程有限公司 | SCR denitrification process and denitrification device of ammonia injection grid adopting non-unidiameter injection orifices |
| CN102225303B (en) * | 2011-04-25 | 2014-02-26 | 张蕊 | Combined apparatus and method for dedusting, desulphurization, denitration, demercuration and smoke extraction of coal-fired flue gas |
| CN102512950B (en) * | 2011-12-23 | 2013-11-13 | 东华大学 | Method for simultaneously removing submicron particles and nitrogen oxides (NOx) in coal-fired flue gas |
| CN102527224A (en) * | 2011-12-31 | 2012-07-04 | 北京利德衡环保工程有限公司 | Method and device for removing sulfur dioxide and nitrogen oxides from flue gas/ waste gas |
| CN104056658B (en) * | 2014-07-02 | 2017-01-11 | 西安华大骄阳绿色科技有限公司 | Low-temperature sulfur-resistant denitration catalyst and preparing method thereof |
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