CN105013276A - Novel smoke and dust control scheme for novel coal-fired boiler - Google Patents
Novel smoke and dust control scheme for novel coal-fired boiler Download PDFInfo
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- CN105013276A CN105013276A CN201510328997.8A CN201510328997A CN105013276A CN 105013276 A CN105013276 A CN 105013276A CN 201510328997 A CN201510328997 A CN 201510328997A CN 105013276 A CN105013276 A CN 105013276A
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Abstract
The present invention relates to a novel smoke and dust control scheme for a novel coal-fired boiler. The boiler comprises a dedusting and denitration system, a dedusting and desulfurization system, a wastewater treatment and recycling system, and a pickling system. The dedusting and denitration system comprises a flue, the flue from top to bottom successively runs through a preliminary filtration screen, a lower diversion grid, a lower locator, an upper diversion grid, and an upper locator. Each lower module disposed on the lower diversion grid is evenly immersed in a flue gas, and an end part of each module is fixed by using a lower cross bar. A steam backwashing system is connected to a side part of the flue. The side part of the flue is further provided with an ammonia adding system. The dedusting and desulfurization system is connected to an outlet end of the flue to filter the smoke and dust and perform spraying for multiple times. The wastewater treatment and recycling system is connected to a wastewater discharge end of the flue, to alkalize and discharge the wastewater. The novel smoke and dust control scheme for a novel coal-fired boiler has dedusting, denitration and desulfurization effects, improves the catalyst efficiency by 40%-50%, and prolongs the service life.
Description
Technical field
The present invention relates to coal-burning boiler field, particularly relate to a kind of Novel coal-fired boiler smoke and dust treatment new departure.This New Scheme applied technical field has: (1) dedusting denitration technology; (2) dust-removal and desulfurizing technology; (3) automatic control technology (4) screen technology; (5) wastewater treatment and reuse technology; (6) pickling technology.
Background technology
According to the existing coal-burning boiler of statistics China more than 50,000, discharge a large amount of NOx, SOx, COx pernicious gases and soot dust granule thing every day, serious environment pollution forms haze and acid rain, and also serious harm health and life security control, and compels under eyebrow.China is a big coal country, is again to produce the big countries such as steel, product cement, product glass, does not burn these enterprises of coal and can close down, also have a strong impact on the national economic development.It is also limited that coal becomes vapour, also will process the smoke and dust treatment problem that coal changes vapour.Existing coal smoke administers complete set of equipments, and occupied ground is large, complex process, and price is high, and investment is large, and production cost is high, and product price is high.The development of these enterprises must be affected.China is that import is leaned on by the deficient country about 2/3 of an air-flow, just in case air feed interrupts, can cause the impact that cannot estimate.
Therefore, the smoke contamination problem solving pollution that caused by coal burning is the technical problem of existing coal-burning boiler.
In view of above-mentioned defect, creator of the present invention obtains this creation finally through long research and practice.
Summary of the invention
The object of the present invention is to provide a kind of Novel coal-fired boiler smoke and dust treatment new departure, in order to overcome above-mentioned technological deficiency.
For achieving the above object, the present invention carries a kind of Novel coal-fired boiler smoke and dust treatment new departure, and it comprises dedusting denitrating system, dusting and desulfuring system, wastewater treatment and reclaiming system and pickling system, wherein,
Described dedusting denitrating system comprises flue, flue passes through just filter screen, lower airflow fence, lower locating device, upper airflow fence and upper locator from top to bottom successively, the every block lower module be arranged on lower airflow fence evenly invades bubble in flue gas, and the lower cross card article of module ends is fixed;
Steam backwashing system is connected with at the sidepiece of flue; Also Ammonia adding System is provided with at the sidepiece of flue;
Be connected with dusting and desulfuring system at the port of export of flue, it carries out multiple times of filtration to flue dust and repeatedly sprays;
Be connected with wastewater treatment and reclaiming system at the waste water outlet side of flue, waste water alkalized, and discharges;
Also be provided with pickling system at the output of waste water, process carries out waste water circulation and process to spray thrower and filter screen after mixing with acid solution after filtration, and grouping pickling, discharges.
Further, fume gases is discharged from economizer, enters the sidepiece of low head, arranges electric butterfly valve at low head, be provided with tap water spray head before valve through electric butterfly valve, through the effect of tap water spray head, is entered by cinder in 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 cut the particle when needing aperture, and first filter screen comprises the domain of lower end and is arranged on the skeleton of upper end, domain.
Further, the top of upper module is provided with cross card article; Also double door is provided with at 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 comprises two booster fans being arranged on upper cover exit; The horizontal flue of booster fan is provided with first group of spray thrower, second group of spray thrower and half overlapping shirt rim conical screen in the same way in the same way; A reverse spray thrower is provided with in the upper end of flue; End one group cone end is reverse spray thrower; Install a mist ball topmost and reclaim the network of rivers, two ends all need to fill spray thrower.
Further, wastewater treatment and reclaiming system is connected with at the waste water outlet side of flue, waste water flows out from chimney bottom, and first make water temperature be down to about 45 DEG C through double pipe heat exchanger, healed water makes boiler replenishing water, waste water enters regulating reservoir, in pond, moisturizing adopts the moisturizing of the simplest automatic control float-controlled valve, pond water teletransmission thermometer, and main pipeline is provided with distance-transmission pressure gauge, flowmeter, PH regulating reservoir;
Employing dosing pump, alkali lye are NAOH, and solution alkali bucket, regulating reservoir is provided with 2 immersible pumps, 2 accurate filters, and backwash dirt enters mummifying pool, is provided with bypass water softener at Trunk Line, makes recirculated water remain demineralized water.
Further, in described pickling system, waste water flows into wastewater disposal basin from chimney bottom, enters accurate filter through immersible pump, enters each spray thrower, filter screen through venturi mixer, blender negative pressure termination acid bucket; Pickling is carried out in grouping from top to bottom.
Further, described steam backwashing system, it comprises bucket, and the intubate upper end of bucket is provided with valve, and the blender of steam through bucket upper end and steam pipe are discharged.
Further, described Ammonia adding System, it comprises air-introduced machine, venturi mixer, dosing pump and ammoniacal liquor storage tank, and above-mentioned element connects successively; The electronic dish valve that ammonia gas mixture exports from end socket enters Ammonia adding System.
Beneficial effect of the present invention is compared with prior art: Novel coal-fired boiler smoke and dust treatment new departure (1) of the present invention has dedusting denitration, desulfurized effect, and indices is all better than the recent standard that the countries concerned issue.
(2) SCR reactor is corresponding with economizer is arranged in space, and washing time is short, does not affect boiler operatiopn;
(3) innovative measure is optimized to SCR reactor, improves catalyst efficiency 40%-50% and extend service life;
(4) do not take new place, utilize flue dedusting denitration sulfur removal technology to be the most economical way, some capital equipment, do not need replacing can Long-Time Service;
(5) maintenance is very convenient, and the time is short, can carry out under not blowing out operating mode;
(6) recycle-water and waste heat can reduce operating cost;
(7) can realize expecting object completely, for coal smoke is administered, open a new way; There is better economic benefit, more far-reaching social benefit, environmental benefit be difficult to estimate;
(8) this new and innovative scheme, all can be able to administer all kinds of size coal-burning boiler flue dust, domestic and international market is wide, and business opportunity is unlimited; Economic benefit competitiveness is strong, for manufacturer improves revenue opportunities;
The deduster of cloth bag complex process is substituted and accessory system can economize a lot of money with first filter screen; By airflow fence module positioning mode alternative module and ranking method, catalytic efficiency 40%-50% can be improved; Run method with flue gas adverse current and substitute flue gas downstream operation method; Easy cleaning, easy-to-discharge slag; Substitute moist desulfurizing tower method by flue dust-removal and desulfurizing method, save money more, the life-span is longer, keeps in repair more convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of Novel coal-fired boiler smoke and dust treatment new departure of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, to above-mentioned being described in more detail with other technical characteristic and advantage of the present invention.
Refer 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, comprising dedusting denitrating system, dusting and desulfuring system, wastewater treatment and reclaiming system and pickling system.
Dedusting mainly contains dry filtration dust removing and wet method filtration dedusting two kinds, removes the Particle size requirements of particle as required, selects different pore size filter screen.
Denitration principle: nitrogen oxides in effluent (NOx), utilizes reducing agent ammonia (NH
3), under catalyst action, be reduced to nitrogen (N
2) and water (H
2o).
Desulfurization principle: the sulfide (SOx) in flue gas be dissolved in the water formed sulfuric acid (sulfurous acid) again with alkaline water in and form sulfate.
Dedusting denitrating system in the embodiment of the present invention, comprising flue, fume gases is discharged from economizer 20, low head 22 just filter screen 19 is entered through electric butterfly valve 21, electric butterfly valve is set at low head 22 outlet pipe section, is used as deslagging, before valve, be provided with tap water spray head 23, through the wash-out valve of tap water spray head 23, with steam backwash, cinder is entered in filter residue pond 24.
Flue dust enters in SCR reactor, passes through just filter screen 19, lower airflow fence locator 18, upper airflow fence locator 14 from bottom to top successively, and the every block lower module 17 be arranged on lower airflow fence 18 evenly invades bubble in flue gas, and the lower cross card article 16 of module ends is fixed.
In the present embodiment, first filter screen 19 is that being suppressed by skeleton filter screen and working net of a band edge forms, and has counter-flush to retain the particle needing aperture, and in the present embodiment, first filter screen 19 is circle composite web with comprising the old name for the Arabian countries in the Middle East of band mounting edge
Flue gas, through upper airflow fence 14, upper module 13, is provided with cross card article fixator 12 on the top of upper module 13; Also being provided with double door 10 in the side of SCR reactor, also can be single open-door.
The top of SCR reactor is provided with upper cover 11, and end socket outlet is provided with electric butterfly valve.
Steam backwashing system is connected with at the outlet of SCR reactor, comprising bucket 44, the intubate upper end of bucket 44 is provided with valve, the blender 45 of steam through bucket 44 upper end and steam pipe 46 mixing water gas enter in the end socket of SCR reactor top and carry out backwash.
Also be provided with Ammonia adding System in the lower end of SCR reactor, comprising air-introduced machine 41, venturi mixer 43, dosing pump 42 and ammoniacal liquor storage tank 40, above-mentioned each element connects successively; Ammonia gas mixture enters in low head from the electronic dish valve outlet port pipe of low head import.
The present invention also comprises dusting and desulfuring system, and the outlet header of upper cover 11 is provided with two booster fans 39, for subsequent use each other; The horizontal flue of booster fan is installed one group of spray thrower and reverse spray thrower 50 and two and half overlapping shirt rim conical screens 49 in the same way, can install successively at the vertical section of flue and include spray thrower 48 and filter screen 47, equally 2-3 group can be installed; Install two mist pearl recycle-water filter screens topmost, two ends all need to fill spray thrower.
Said structure is suitable for the coal-burning boiler that chimney internal diameter is greater than 1.2 meters, and to being less than 1.1 meters of internal diameter boilers, then similar, separately make design treatment depending on concrete condition.
Wastewater treatment and reclaiming system is connected with at the waste water outlet side of flue, waste water flows out from chimney bottom, first water temperature is made to be down to about 45 DEG C through double pipe heat exchanger 37, healed water makes boiler replenishing water, and waste water enters regulating reservoir 36, and in pond, moisturizing adopts the simplest automatic control float-controlled valve moisturizing 38, pond water teletransmission thermometer 34, measuring pump 33 Trunk Line is provided with distance-transmission pressure gauge 26, flowmeter 27, PH instrument 30.Adopt dosing pump 33, alkali bucket 32, regulating reservoir 36 teletransmission PH instrument 30 is provided with 2 immersible pumps 35, and for subsequent use each other, 2 accurate filters 25 are for subsequent use each other, and backwash dirt enters mummifying pool 29, are provided with bypass water softener 28 at Trunk Line, make recirculated water remain demineralized water.
Also be provided with pickling system at the output of waste water, waste water flows into wastewater disposal basin 51 from chimney bottom, enters accurate filter 55, enter each pickling valve through venturi mixer 54 through immersible pump 52, and pickling is carried out in grouping from top to bottom.Blender negative pressure termination acid bucket 53.
To the requirement of dusting and desulfuring system major function device layout
(1) shirt rim conical screen is required: 1. material wants acid and alkali-resistance; 2. sturdy and durable; 3. long service life; 4. 5 fixed; 5. filter screen divides working net and skeleton is repressed forms; 6. effective filtration area > 1.2-1.5 times of flue cross-sectional area; 7. shirt rim width is greater than space distance; 8. aperture of filter screen is often organized from top to down ascending.9. according to boiler model and corresponding flue internal diameter, by product approval seriation.
(2) mist pearl water conical screen is reclaimed, filter effective area > 1.5-2.0 times of flue cross-sectional area, aperture is less, and other requirements are identical with (1), chimney smooth gas discharge can be made to be principle after debugging, two ends all establish spray thrower to do pickling.
(3) spray thrower requires: 1. jet diameters is 200 millimeter; 2. spray area≤flue cross section; 3. each structure size is identical, selects different aperture of filter screen and sprays cambered surface; 4. water discharge density, height are controlled by screen and each control valve.
(4) water-proof CCD camera, water proof lamp, each controls monitoring sample point, to be deployed to ensure effective monitoring and control of illegal activities enforcement by professional
(5) each control 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.
The foregoing is only preferred embodiment of the present invention, is only illustrative for invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes in the spirit and scope that invention claim limits to it, amendment, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (9)
1. a Novel coal-fired boiler smoke and dust treatment new departure, is characterized in that, it comprises dedusting denitrating system, dusting and desulfuring system, wastewater treatment and reclaiming system and pickling system, wherein,
Described dedusting denitrating system comprises flue, flue passes through just filter screen, lower airflow fence, lower locating device, upper airflow fence and upper locator from top to bottom successively, the every block lower module be arranged on lower airflow fence evenly invades bubble in flue gas, and the lower cross card article of module ends is fixed;
Steam backwashing system is connected with at the sidepiece of flue; Also Ammonia adding System is provided with at the sidepiece of flue;
Be connected with dusting and desulfuring system at the port of export of flue, it filters flue dust and repeatedly sprays;
Be connected with wastewater treatment and reclaiming system at the waste water outlet side of flue, waste water alkalized, and discharges;
Also be provided with pickling system at the output of waste water, after filtration with grouping pickling, discharge.
2. Novel coal-fired boiler smoke and dust treatment new departure according to claim 1, it is characterized in that, fume gases is discharged from economizer, the sidepiece of low head is entered through electric butterfly valve, at low head, electric butterfly valve is set, be provided with tap water spray head before valve, through the effect of tap water spray head, cinder entered in filter residue pond.
3. Novel coal-fired boiler smoke and dust treatment new departure according to claim 2, it is characterized in that, the described filter screen that goes out is formed by working net and the compacting of skeleton filter screen, and having counter-flush to retain the particle needing aperture, first filter screen comprises the domain of lower end and is arranged on the skeleton of upper end, domain.
4. Novel coal-fired boiler smoke and dust treatment new departure according to claim 2, is characterized in that, is provided with cross card article fixator on the top of upper module; Also double door is provided with at the sidepiece of flue; The top of flue is provided with upper cover, and end socket outlet is provided with electric butterfly valve.
5. Novel coal-fired boiler smoke and dust treatment new departure according to claim 4, is characterized in that, described dusting and desulfuring system comprises two booster fans being arranged on upper cover exit; The horizontal flue of booster fan is provided with first group of spray thrower and the first half overlapping shirt rim conical screens in the same way, and both install 2-3 group and half overlapping shirt rim conical screen successively; A reverse spray thrower is provided with in the upper end of flue; End one group cone end is reverse spray thrower; Install a mist ball topmost and reclaim the network of rivers, two ends all need to fill spray thrower.
6. Novel coal-fired boiler smoke and dust treatment new departure according to claim 4, it is characterized in that, be connected with wastewater treatment and reclaiming system at the waste water outlet side of flue, waste water flows out from chimney bottom, first water temperature is made to be down to about 45 DEG C through double pipe heat exchanger, healed water makes boiler replenishing water, and waste water enters regulating reservoir, and in pond, moisturizing adopts the moisturizing of the simplest automatic control float-controlled valve, pond water teletransmission thermometer, pond water Trunk Line is provided with distance-transmission pressure gauge, flowmeter, PH instrument;
Adopt dosing pump, alkali lye storage drum to regulate PH, regulating reservoir is provided with 2 immersible pumps, 2 accurate filters, and backwash dirt enters mummifying pool, is provided with bypass water softener at Trunk Line, makes recirculated water remain demineralized water.
7. Novel coal-fired boiler smoke and dust treatment new departure according to claim 6, is characterized in that, in described pickling system, waste water flows into wastewater disposal basin from chimney bottom, enter accurate filter through immersible pump, enter each pickling valve through venturi mixer, blender negative pressure termination acid bucket; Pickling is carried out in grouping from top to bottom.
8. Novel coal-fired boiler smoke and dust treatment new departure according to claim 2, is characterized in that, described steam backwashing system, and it comprises bucket, and the intubate upper end of bucket is provided with valve, and the blender of steam through bucket upper end and steam pipe are discharged.
9. Novel coal-fired boiler smoke and dust treatment new departure according to claim 8, is characterized in that, described Ammonia adding System, and it comprises air-introduced machine, venturi mixer, dosing pump and ammoniacal liquor storage tank, and above-mentioned each element connects successively; The electronic dish valve outlet port that ammonia gas mixture exports from low head enters Ammonia adding System.
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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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| CN101637700A (en) * | 2009-08-14 | 2010-02-03 | 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 |
| CN102225303A (en) * | 2011-04-25 | 2011-10-26 | 张蕊 | Combined apparatus and method for dedusting, desulphurization, denitration, demercuration and smoke extraction of coal-fired flue gas |
| CN102512950A (en) * | 2011-12-23 | 2012-06-27 | 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 |
| CN104056658A (en) * | 2014-07-02 | 2014-09-24 | 宋华 | Low-temperature sulfur-resistant denitration catalyst and preparing method thereof |
-
2015
- 2015-06-16 CN CN201510328997.8A patent/CN105013276B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219329A (en) * | 2007-09-27 | 2008-07-16 | 中电投远达环保工程有限公司 | Flue gas denitrating technique with preposed whirlwind beforehand dust removal SCR |
| CN101637700A (en) * | 2009-08-14 | 2010-02-03 | 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 |
| CN102225303A (en) * | 2011-04-25 | 2011-10-26 | 张蕊 | Combined apparatus and method for dedusting, desulphurization, denitration, demercuration and smoke extraction of coal-fired flue gas |
| CN102512950A (en) * | 2011-12-23 | 2012-06-27 | 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 |
| CN104056658A (en) * | 2014-07-02 | 2014-09-24 | 宋华 | Low-temperature sulfur-resistant denitration catalyst and preparing method thereof |
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Granted publication date: 20180403 Termination date: 20210616 |