CN102364249A - Novel process for producing steam and generating electric power by recycling heat of waste residue, waste ash and waste gas - Google Patents
Novel process for producing steam and generating electric power by recycling heat of waste residue, waste ash and waste gas Download PDFInfo
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- CN102364249A CN102364249A CN2011101737505A CN201110173750A CN102364249A CN 102364249 A CN102364249 A CN 102364249A CN 2011101737505 A CN2011101737505 A CN 2011101737505A CN 201110173750 A CN201110173750 A CN 201110173750A CN 102364249 A CN102364249 A CN 102364249A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The invention discloses a novel waste-residue boiler split-type steam producing process, which relates to the comprehensive utilization of waste residue of boilers and gas generating boilers in chemical fertilizer plants and the environmental protection, and is characterized in that: a split-type boiler is adopted, and a dust collector cyclone is arranged in the middle of the boiler, so scouring of particles in the flue gas on boiler parts can be reduced, and the service life of the boiler can be prolonged; and an over heater, a waste heat boiler, a coal economizer and an air preheater are integrated into a whole, so the heat loss can be reduced. Fluidized-bed combustion inside the boiler can be realized, so adequate combustion can be realized, the incorporation quantity of the crude coal can be reduced, and the exhausted sulfur dioxide (SO2) can be reduced. Back-pressure power generation is adopted, so the heat energy can be adequately utilized.
Description
Technical field the present invention relates to waste residue, waste gas, useless grey three wastes burning boiler system vapour electrification technique as well as, directly relates to maximization three wastes system vapour electrification technique as well as.
Technical background domestic nitrogen fertilizer plant CFBB and fixed bed batch (-type) Gas-making Furnace all produce a large amount of slags, waste gas, useless ash, waste residue fixed carbon content 20-35% wherein, and useless grey fixed carbon content 35-45% also has about 10% combustible gas in the waste gas.Researched and developed the thermopnore boiler using waste slag at present, waste residue mixes the high heating value fat coal after pulverizing, and is combustion adjuvant with the synthetic ammonia emptying gas, has obtained the effect of waste reside comprehensive utilization.The problem that exists is; The fat coal incorporation is big; Particle in the flue gas is to boiler, wash away seriously boiler components such as overflow pipe, overheated steam pipes, and the life-span is short, and it is necessary research and develop a kind of waste residue that maximizes, useless ash, exhaust gas utilization rate system vapour electrification technique as well as high, boiler life length.
Summary of the invention the object of the invention just provides a kind of waste residue, useless ash, boiler branch system gas new technology, improves the waste residue utilization rate, reduces the raw coal incorporation, reduces the SO2 discharge capacity, prolonged boiler service life.
The objective of the invention is to realize like this.The waste residue centralized collection that boiler, Gas-making Furnace produce is mixed the useless ash of low heat value of carbon containing 40% to coal yard, pulverizes the back and sends into coal bunker with bucket elevator, by coal feeder the coal dust slag evenly is sprinkled into the combustion chamber.Air blast is sent into pressure-air from the bottom, combustion chamber, and slag ash, Boiling Combustion produce high-temperature gas.Waste gas is sent on top, combustion chamber, and burning produces high-temperature flue gas.High-temperature flue gas directly returns the combustion chamber through the isolated cinder of cyclone dust removal; Fully burning; Purifying high temperature gas after the dedusting, through the saturated vapor tube bank of combination stove top, heating saturated vapor wherein becomes high pressure, superheated steam; Get into convective water tube bundle, heating soft water wherein produces saturated vapor.Pass through " economizer " preheating soft water wherein again and supply convective water tube bundle.Superheated steam goes the generating of back pressure type steam turbine generator back pressure, and steam back pressure to 0.58～0.98MPa supplies process steam.
Because the present invention's Boiling Combustion in the combustion chamber, basic completing combustion has improved waste residue, useless ash, exhaust gas utilization rate, has reduced the SO2 discharge capacity; The employing boiler is split type, the centre is provided with deduster, has reduced flue gas to the washing away of boiler component, and has prolonged boiler service life; Adopt superheater, to the combination body of heater of overflow pipe, economizer, air preheater quaternity, thermal loss is few, the thermal efficiency is high.The generating of superheated steam back pressure makes full use of heat energy.
Appended drawings is a process flow diagram of the present invention.
The embodiment drawings show a kind of process flow diagram of large-scale waste residue waste gas comprehensive utilization generation process.Further specify with regard to accompanying drawing below.
Said step (1) waste residue waste gas burning; Be with the ratio blending of boiler, Gas-making Furnace slag, useless ash, bituminous coal, slag, ash, the coal of blending pulverized with pulverizer that granularity is 0.5-1mm in 4: 4: 2; Continuously fuel is delivered to the coal bunker storage with bucket elevator; Dross coal powder in the coal bunker is evenly shed in the combustion chamber with coal-distributing machine, sent into air from the bottom, combustion chamber, waste gas in synthesizing ammonia (CO, CH4) is sent into the combustion chamber simultaneously with compressor with air blast.Fuel combination (coal, slag, ashes) Boiling Combustion under air and combustible exhaust gas cooperation, burning velocity is fast, and is effective.Produce 950-1000 ℃ of high-temperature gas.
Said step (2) is produced saturated vapor, be waste residue waste gas in the Boiling Combustion process, combustion chamber temperature surpasses 1000 ℃, and the water-cooled part of sealing UNICOM is housed around the inside, combustion chamber, continuously mends soft water.At high temperature evaporation rises to steamdrum at once, enters into steam superheater after the buffering dehydration.
Said step (3) dedusting is the high-temperature gas that produces of a combustion chamber entrained solids particle simultaneously, like duff grain, microlith grain, removes the entrained solid particle through cyclone dust collectors, avoids the washing away of later thermal part prolonged its life-span.
Said step (4) production high pressure, superheated steam is the shell side of the high-temperature gas entering superheater after (3) dedusting, and the saturated vapors in 950 ℃ of heating of temperature tube side make it boost to 9.8MPa, are warmed up to 540 ℃.The saturated vapor that saturated vapor produces from (2) combustion chamber water-cooled part and (6) waste heat recovery.
The generating of said step (5) back pressure is the high temperature and high pressure steam that (4) produce, and promotes back pressure turbine and rotates, and steam turbine drives generator for electricity generation, 260 ℃ of residual air temperature, and pressure 0.58MPa supplies to produce the user and uses vapour.
Said step (6) waste heat recovery production saturated vapor goes downwards to convective water tube bundle through the high-temperature gas after (4) production high pressure, superheated steam, 450 ℃ of temperature, and the soft water in the heating tube bundle is produced saturated vapor, after drum buffering branch is dried up, removes (4) steam superheater.、
Said step (7) soft water preheating through 320 ℃ of the hot-gas temperatures behind (6) waste heat recovery production saturated vapor, goes downwards to so-called economizer heating soft water wherein, and (2) supply the water-cooled part and (6) waste heat recovery production saturated vapor in the combustion chamber continuously.
Claims (8)
1. a waste residue waste gas fully utilizes generation process.It is characterized in that having following steps: (1) waste residue waste gas burning.(2) produce saturated vapor.(3) dedusting.(4) produce high pressure superheater gas.(5) back pressure generating.(6) waste heat recovery produces saturated vapor.(7) soft water preheating.
2. according to the said a kind of waste residue waste gas comprehensive utilization of claim 1 generation process, (1) the waste residue waste gas burning that it is characterized in that having following steps.Be after the slag of boiler and Gas-making Furnace, ashes and the blending of part raw coal are pulverized, to be shed to the combustion chamber by coal-distributing machine, the preheated air that is blown at waste gas in synthesizing ammonia that feeds and air blast blows time, Boiling Combustion.
3. according to the said a kind of waste residue waste gas comprehensive utilization generation process of claim 1; (2) produce saturated vapor to it is characterized in that having following steps; Be the soft water production saturated vapor in the water-cooled part around (1) waste gas waste residue burning heating flame chamber interior, send into (4) steam superheater through drum and produce high pressure, superheated steam.
4. according to the said a kind of waste residue waste gas comprehensive utilization of claim 1 generation process, (3) dedusting that it is characterized in that having following steps, be the high-temperature flue gas of discharging through cyclone dust collectors, remove solid particle.
5. according to the said a kind of waste residue waste gas comprehensive utilization generation process of claim 1; (4) the production high pressure, superheated steam that it is characterized in that having following steps; Be the saturated vapor that the High Temperature Gas after the dedusting produces through (2) in the shell side heating tube bundle of superheater, form high pressure, superheated steam.
6. according to the said a kind of waste residue waste gas comprehensive utilization generation process of claim 1, (5) back pressure is generated electricity to it is characterized in that having following steps, is the high pressure, superheated steam drive steam turbine rotation from (4) superheater, the steam turbine generator for electricity generation.Residual air after the back pressure supplies to produce the user outward.
7. according to the said a kind of waste residue waste gas comprehensive utilization generation process of claim 1; (6) waste heat recovery that it is characterized in that having following steps; Produce saturated vapor; Be to produce high-temperature gas behind the superheated steam again through the soft water in the overflow pipe heating tube is produced saturated vapor, send into (4) steam superheating gas through drum and form high pressure, superheated steam through (4).
8. according to the said a kind of waste residue waste gas comprehensive utilization generation process of claim 1; (7) the soft water preheating that it is characterized in that having following steps; Be that high-temperature gas supplies the water-cooled part in (2) combustion chamber to produce saturated vapor with (6) waste heat recovery through economizer preheating soft water wherein after reclaiming the generation saturated vapor through (6) preheating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101737505A CN102364249A (en) | 2011-06-27 | 2011-06-27 | Novel process for producing steam and generating electric power by recycling heat of waste residue, waste ash and waste gas |
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| CN2011101737505A CN102364249A (en) | 2011-06-27 | 2011-06-27 | Novel process for producing steam and generating electric power by recycling heat of waste residue, waste ash and waste gas |
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| CN102364249A true CN102364249A (en) | 2012-02-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075332A (en) * | 2014-07-18 | 2014-10-01 | 武汉东晟捷能科技有限公司 | System and method for increasing comprehensive utilization rate of yellow phosphorus tail gas |
| CN108730997A (en) * | 2018-05-30 | 2018-11-02 | 苏州市玄天环保科技有限公司 | A kind of waste gas treatment equipment carrying out energy recovery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2538749Y (en) * | 2002-01-07 | 2003-03-05 | 武汉化工学院 | Charging spreading-out machine for fluidized bed |
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- 2011-06-27 CN CN2011101737505A patent/CN102364249A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2538749Y (en) * | 2002-01-07 | 2003-03-05 | 武汉化工学院 | Charging spreading-out machine for fluidized bed |
Non-Patent Citations (1)
| Title |
|---|
| 白林波: "造气炉三废混燃余热发电", 《节能与环保》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075332A (en) * | 2014-07-18 | 2014-10-01 | 武汉东晟捷能科技有限公司 | System and method for increasing comprehensive utilization rate of yellow phosphorus tail gas |
| CN108730997A (en) * | 2018-05-30 | 2018-11-02 | 苏州市玄天环保科技有限公司 | A kind of waste gas treatment equipment carrying out energy recovery |
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Application publication date: 20120229 |