CN108253407A - Cleaning steam produces combustion system - Google Patents

Cleaning steam produces combustion system Download PDF

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Publication number
CN108253407A
CN108253407A CN201810051267.1A CN201810051267A CN108253407A CN 108253407 A CN108253407 A CN 108253407A CN 201810051267 A CN201810051267 A CN 201810051267A CN 108253407 A CN108253407 A CN 108253407A
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CN
China
Prior art keywords
coal
connect
flue gas
combustion system
cleaning steam
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Application number
CN201810051267.1A
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Chinese (zh)
Inventor
李俊开
周敬国
刘方剑
张福林
明晶
魏海涛
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Tangshan Complex And Heat Supply Co Ltd
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Tangshan Complex And Heat Supply Co Ltd
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Priority to CN201810051267.1A priority Critical patent/CN108253407A/en
Publication of CN108253407A publication Critical patent/CN108253407A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
    • F23B40/00—Combustion apparatus with driven means for feeding fuel into the combustion chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/79—Injecting reactants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/006—Layout of treatment plant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/027—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using cyclone separators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/402—Alkaline earth metal or magnesium compounds of magnesium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/602—Oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00—Preventing emissions
    • F23J2215/10—Nitrogen; Compounds thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00—Preventing emissions
    • F23J2215/20—Sulfur; Compounds thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/10—Intercepting solids by filters
    • F23J2217/101—Baghouse type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2217/00—Intercepting solids
    • F23J2217/40—Intercepting solids by cyclones
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/15081—Reheating of flue gases

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Treating Waste Gases (AREA)

Abstract

The present invention relates to cleaning steams to produce combustion system, has burning boiler and fume treatment unit, and fume treatment unit includes：Selective non-catalytic reduction denitrification apparatus, for spraying reducing agent to the burner hearth of burning boiler；Cyclone separator is connect with the furnace outlet of burning boiler；Sack cleaner is connect with cyclone separator；Magnesia FGD tower is connect with the gas vent of sack cleaner；Chimney is connect by desulfurizing tower exhaust passage with the gas vent of magnesia FGD tower；There is circulation dust collector flue gas recirculation channel and gas composition detection controller, flue gas recirculation passage end to be connect with sack cleaner, the downstream connection of the other end and gas componant detection controller on desulfurizing tower exhaust passage.The present invention can carry out deep purifying to the flue gas that coal-fired steam boiler generates, and fully ensure that the clean manufacturing of steam.

Description

Cleaning steam produces combustion system
Technical field
The present invention relates to boiler combustion system fields, and combustion system is produced more particularly, to a kind of cleaning steam.
Background technology
Boiler is indispensable equipment in many productions for needing to use steam, by burning fuel, so as to evaporate Go out steam, for producing.Boiler combustion system, especially boiler fired coal system are extensive in the enterprises such as power generation, steel, chemical industry Using.Coal-burning boiler in combustion, in the flue gas of discharge containing a large amount of solid particle, carbon monoxide, nitrogen oxides with And the harmful components such as sulfur dioxide so that haze phenomenon etc. occurs in surrounding area, and getting worse in recent years, depth endanger periphery The health of personnel.
In addition, during by boiler for producing steam, the situation of boiler combustion is to the generation of steam and the utilization of fuel There is very great influence in rate.It can show that absolute temperature is higher from Arrhenius law, then the speed chemically reacted in boiler Degree is faster.Therefore when bleed enters in boiler, generally air is heated, to improve efficiency of combustion.But even if such as This, due to coal volume of fuel is big, humidity is high etc., it is insufficient to the burning of coal to can still result in existing coal-burning boiler, this The harmful components such as the carbon monoxide in discharge flue gas are just further increased, meanwhile, have coal fuel availability low, waste The problem of coal resources.
The pollutants emission intensity of boiler, especially coal-burning boiler is high, serious to air environmental pollution, and active boiler amount It is big wide, it is big to be laid out quite dispersion, pollution control difficulty.
Invention content
The present invention is to propose in view of the above problems, and its purpose is to provide a kind of cleaning steams to produce combustion system.
The following technical scheme is adopted to achieve the purpose of the present invention.
The invention of technical solution 1 for a kind of cleaning steam produce combustion system, using coal as fuel, have burning boiler and Fume treatment unit, the fume treatment unit include：Selective non-catalytic reduction denitrification apparatus, for the burning boiler Burner hearth internal spray reducing agent；Cyclone separator, entrance are connect with the furnace outlet of the burning boiler；Sack cleaner, Entrance is connect with the gas vent of the cyclone separator；Magnesia FGD tower, the gas of air inlet and the sack cleaner Outlet connection；Chimney, entrance are connect by desulfurizing tower exhaust passage with the gas vent of the magnesia FGD tower, are exported and outer Portion's environmental communication.
The fume treatment unit further includes circulation dust collector, the circulation dust collector have flue gas recirculation channel and The gas componant detection controller being arranged on the desulfurizing tower exhaust passage.One end of the flue gas recirculation channel and the bag The entrance connection of formula deduster, the gas on the other end of the flue gas recirculation channel and the desulfurizing tower exhaust passage into Sorting surveys the exhaust downstream connection of controller, flue gas recirculation channel solenoid valve is equipped on the flue gas recirculation channel, in institute It states and desulfurizing tower row is installed on the exhaust downstream being connect with the other end of the flue gas recirculation channel on desulfurizing tower exhaust passage Gas channel solenoid valve, the flue gas recirculation channel solenoid valve and the desulfurizing tower exhaust passage solenoid valve respectively with the gas into Sorting surveys controller connection.
In addition, the cleaning steam production combustion system of technical solution 2, in the cleaning steam production burning system of technical solution 1 In system, the fume treatment unit further includes clinker treater, and the clinker treater includes and the cyclone separator Solid outlet connection lag cooler and the slag storehouse that is connect by conveyer with the lag cooler.
In addition, the cleaning steam production combustion system of technical solution 3, in the cleaning steam production burning system of technical solution 1 In system, cleaning steam production combustion system further include the indoor coal storage yard set gradually, first to coal unit, coal crusher and Second gives coal unit.
Described first includes reciprocating coal feeder to coal unit and passes through the first conveying device and the reciprocating coal feeder The roller picker of connection, the output terminal of the roller picker are connect with the input terminal of the coal crusher；Described second gives coal unit Including the Gravimetric Coal Feeders that coal scuttle and input terminal are connect with the output terminal of the coal scuttle, the output terminal of the coal crusher passes through Second conveying device is connect with the input terminal of the Gravimetric Coal Feeders, the output terminal of the Gravimetric Coal Feeders and the burning boiler Feeding mouth connection.
In addition, the cleaning steam production combustion system of technical solution 4, in the cleaning steam production burning system of technical solution 3 In system, heating, drying machine device is respectively arranged in the inside of the indoor coal storage yard and the coal scuttle.
In addition, the cleaning steam production combustion system of technical solution 5, in the cleaning steam production burning system of technical solution 1 In system, the nozzle of the selective non-catalytic reduction denitrification apparatus is being arranged on the furnace outlet of the burning boiler with the rotation The position of the entrance connection of wind separator.
In addition, the cleaning steam production combustion system of technical solution 6, in the cleaning steam production burning system of technical solution 1 In system, the sack cleaner is pulsed jet cloth filter.
In addition, the cleaning steam production combustion system of technical solution 7, in the cleaning steam production burning system of technical solution 1 In system, flue gas reheat is provided between the gas vent of the magnesia FGD tower and the entrance of the desulfurizing tower exhaust passage Device.
In addition, the cleaning steam production combustion system of technical solution 8, in the cleaning steam production burning system of technical solution 1 In system, the ash cellar that entrance is connect with the solid outlet of the sack cleaner is further included, is gone out in the solid of the sack cleaner Pneumatic ash conveying plant is provided between mouth and the entrance of the ash cellar.
In addition, the cleaning steam production combustion system of technical solution 9, in the cleaning steam production burning system of technical solution 1 In system, air-introduced machine is provided between the gas vent of the sack cleaner and the air inlet of the magnesia FGD tower.
In addition, the cleaning steam production combustion system of technical solution 10, in the cleaning steam production burning system of technical solution 3 In system, first conveying device and second conveying device are respectively belt-type conveying device.
Compared with prior art, the present invention has the advantages that.
Coal-burning boiler in combustion, contains a large amount of solid particle, carbon monoxide, nitrogen oxides in the flue gas of discharge And the harmful components such as sulfur dioxide so that haze phenomenon etc., and getting worse in recent years, depth harm week occurs in surrounding area The health of side personnel.
In this regard, the present invention provides a kind of cleaning steams to produce combustion system, using coal as fuel, there is burning boiler And fume treatment unit.
Wherein, fume treatment unit includes：Selective non-catalytic reduction denitrification apparatus, for into the burner hearth of burning boiler Spray reducing agent in portion；The furnace outlet connection of cyclone separator, entrance and burning boiler；Sack cleaner, entrance and whirlwind point Gas vent connection from device；The gas vent connection of magnesia FGD tower, air inlet and sack cleaner；Chimney, entrance lead to The gas vent that desulfurizing tower exhaust passage is crossed with magnesia FGD tower is connect, and outlet is connected with external environment.
In addition, the fume treatment unit further includes circulation dust collector.
Above-mentioned circulation dust collector has flue gas recirculation channel and the gas componant being arranged on desulfurizing tower exhaust passage inspection Survey controller.One end of flue gas recirculation channel and the entrance of sack cleaner connect, the other end of flue gas recirculation channel and desulfurization The exhaust downstream connection of gas componant detection controller on tower exhaust passage, flue gas recirculation is equipped on flue gas recirculation channel Channel solenoid valve is equipped on the exhaust downstream being connect with the other end of flue gas recirculation channel on desulfurizing tower exhaust passage de- Sulphur tower exhaust passage solenoid valve, flue gas recirculation channel solenoid valve and exhaust passage solenoid valve detect controller with gas componant respectively Connection.
Before coming into operation to cleaning steam production combustion system, desulfurizing tower exhaust passage solenoid valve is closed, to the steam Clean manufacturing combustion system comes into operation, can be by SNCR denitration device in operational process, i.e., above-mentioned selective non-catalytic is also Former denitrification apparatus to spraying reducing agent in burner hearth, so as to carry out the reduction of selectivity to the nitrogen oxides in the flue gas of generation, leads to Often, the reducing agent used is ammonia or urea, when using ammonia as reducing agent, generates following reactions：4NH3+4NO+O2→4N2+ 6H2O when using urea as reducing agent, then generates following reactions：NO+CO (NH2) 2+1/2O2 → 2N2+CO2+H2O, from And reach denitration purpose.
Flue gas after above-mentioned SNCR denitration device denitration is entered in cyclone separator, is detached by cyclone separator, point Solid particle from generation is entered in ash cellar and is utilized for subsequent processing；The gas of generation is detached from the outlet of cyclone separator Mouth enters further dedusting in sack cleaner, the gas after sack cleaner dedusting enter in magnesia FGD tower into Row flue gas desulfurization by magnesia wet method, in magnesia FGD tower, MgO slurries absorb the SO2 in flue gas, generate aqueous magnesium sulfite And magnesium sulfate.
The pre- gas being discharged in atmospheric environment after above-mentioned magnesia FGD tower carries out flue gas desulfurization by magnesia wet method It enters in flue gas recirculation channel, and the gas componant by being arranged on desulfurizing tower exhaust passage detects controller to above-mentioned walkthrough The content of the gas componants such as the sulfur dioxide gone out in the gas into atmospheric environment is detected, in sulfur dioxide detected etc. For the content of gas componant higher than setting when discharging content, the control unit of gas componant detection controller controls flue gas recirculation Channel solenoid valve is opened, and the above-mentioned pre- gas being discharged in atmospheric environment returns to weight in sack cleaner from flue gas recirculation channel Multiple dedusting, flue gas desulfurization by magnesia wet method process, until when discharging content of setting is reached or fallen below, gas componant detection The control unit control flue gas recirculation channel solenoid valve of controller is closed, and desulfurizing tower exhaust passage solenoid valve is opened, and meets discharge It is required that gas can be from smoke stack emission to atmospheric environment.
It should be strongly noted that above-mentioned gas componant detection controller can be by being respectively provided with detection function and control work( Two single devices of energy are electrically connected, alternatively, being formed as the integrated equipment simultaneously with detection unit and control unit.
After the present invention comes into operation, smoke components can effectively be purified, so as to make to drain into the gas in atmospheric environment Body meets sets requirement.
According to the invention of technical solution 2, further, setting fume treatment unit further includes clinker treater, clinker Processing unit includes the lag cooler being connect with the solid outlet of cyclone separator and the slag storehouse being connect by conveyer with lag cooler, So as to carry out cooling collection to the solid that cyclone separator is isolated.
In addition, during by boiler for producing steam, due to coal volume of fuel is big, humidity is high etc., cause existing Have that coal-burning boiler is insufficient to the burning of coal, be harmful into so as to further increase carbon monoxide in discharge flue gas etc. Point, meanwhile, the problem of having coal fuel availability low, waste coal resources.
In contrast, in the invention of technical solution 3, on the basis of the invention of technical solution 1, further, setting Cleaning steam production combustion system further includes the indoor coal storage yard set gradually, first to coal unit, coal crusher and second to coal Unit.First includes reciprocating coal feeder and the roller bearing being connect by the first conveying device with reciprocating coal feeder to coal unit Sieve, the output terminal of roller picker and the input terminal of coal crusher connect；Second includes coal scuttle and input terminal and coal scuttle to coal unit Output terminal connection Gravimetric Coal Feeders, the input that the output terminal of coal crusher passes through the second conveying device and Gravimetric Coal Feeders End connection, the output terminal of Gravimetric Coal Feeders and the feeding mouth of burning boiler connect.
Coal can be carried out fully to crush by roller picker and coal crusher as a result, so as to make to enter burning boiler Burner hearth in coal for little particle coal dust, and then coal is made fully to burn, improves the combustion utilization efficiency of coal, reduce by an oxidation The yield of the pernicious gases such as carbon.
In practical applications, independent design can be further carried out to the sieve of roller picker, meanwhile, increase between adjacent sieve Gap, to increase screen size, so as to avoid viscous coal, chute blockage phenomenon；In addition, it can also be set in the upper surface of the rack of indoor coal storage yard Drainage trough is put, so as to carry out water conservancy diversion to liquid such as rainwater in time.
According to the invention of technical solution 4, further, heating, drying machine is respectively arranged in the inside of indoor coal storage yard and coal scuttle Device, so as to be heated to coal dust, ensure that bunker coal has dry storage condition.
According to the invention of technical solution 5, by the way that the nozzle of selective non-catalytic reduction denitrification apparatus is arranged on burning pot The position being connect with the entrance of cyclone separator of the furnace outlet of stove, so that it is guaranteed that temperature of the reducing agent at 850 DEG C to 1100 DEG C It is sprayed in degree range to burner hearth inside, it is ensured that the uninterrupted progress of denitration reaction.
According to the invention of technical solution 6, setting sack cleaner is pulsed jet cloth filter, with using common bag-type dusting Device is compared, and action of low-voltage pulse technology with common bag type dust removing technology is combined, on the basis of common sack cleaner, is had The processing gas ability of higher purification efficiency and bigger, and with performance is stable, easy to operate, life-span of the filter bag is long, maintenance mans The advantages that work amount is small.
In addition, the gas temperature carried out due to oxidized magnesium desulfurizing tower after flue gas desulfurization by magnesia wet method is in 44 DEG C to 55 Between DEG C, it is saturation state, has been less than acid dew point, if being directly discharged in atmospheric environment that following negative consequence can be brought, 1. Plume rise diffusivity is low, can be formed about water mist in chimney, pollute environment；2. because of flue-gas temperature in dew point hereinafter, having Acid drop condenses out from flue gas, forms " acid rain " phenomenon, not only can cause environmental pollution, but also desulfurizing tower can be vented logical Road and inner wall of stack cause corrosion etc..
In contrast, according to the invention of technical solution 7, in gas vent and the desulfurizing tower exhaust passage of magnesia FGD tower Entrance between be provided with smoke re-heater, as a result, using the smoke re-heater by oxidized magnesium desulfurizing tower carry out magnesia The temperature of gas after wet process of FGD is discharged after being heated to 80 DEG C or more of temperature, can further set the smoke re-heater With thermostatic controller, so as to which the temperature for ensureing the gas after oxidized magnesium desulfurizing tower progress flue gas desulfurization by magnesia wet method is protected It holds between 80 DEG C to 100 DEG C, to avoid flue-gas temperature in dew point hereinafter, causing corruption to desulfurizing tower exhaust passage and inner wall of stack Erosion, while atmosphere hoist height is improved, the diffusivity of flue gas is improved, meanwhile, avoid exhaust temperature excessively high.
According to the invention of technical solution 8, the ash cellar of the solid outlet connection of entrance and sack cleaner is further included, in pocket type Pneumatic ash conveying plant is set between the solid outlet of deduster and the entrance of ash cellar, with setting screw conveyor or burying scraper plate conveying Other conventional machinery ash conveying devices such as machine or bucket elevator are compared, and pneumatic ash conveying plant has the advantages that the following：1. equipment Simply, floor space it is small, convenient for arrangement；2. landline can arbitrarily be chosen, transfer passage can it is horizontal, tilt or be arranged vertically, Flexible arrangement；3. easily carrying out the automation of group's disk, required operations staff is few；4. convenient for fixed point conveying over long distances and by dispersion The lime-ash of each ash disposal point carries out collecting medium.
According to the invention of technical solution 9, between the gas vent of sack cleaner and the air inlet of magnesia FGD tower Air-introduced machine is provided with, so as to which the air that can accelerate the gas vent outflow from sack cleaner rapidly enters magnesia FGD tower In, so as to improve desulfuration efficiency.
According to the invention of technical solution 10, it is respectively belt-type conveying dress to set the first conveying device and the second conveying device It puts, as a result, with the advantageous effect that equipment installation is simple, transmission process is quick and smooth.
Rated capacity will be put into according to the cleaning steam of the structure setting of above-mentioned technical proposal production combustion system After the boiler of 40t/h carries out use, the gas content that it is finally discharged is detected, wherein, in flue dust at particle concentration In 10mg/m3 hereinafter, sulfur dioxide concentration be in 80mg/m3 hereinafter, nitrous oxides concentration be in 200mg/m3 hereinafter, according to 《Emission standard of air pollutants for boilers GB13271-2014》Regulation, from 1 day July in 2014, the air of newly constructed boiler is dirty It contaminates in object concentration of emission limit value, it is specified that rated capacity should meet in the exhaust content of the coal-burning boiler of more than 10t/h：Particulate matter Maximum concentration is 50mg/m3, and sulfur dioxide maximum concentration is 300mg/m3, and nitrogen oxides maximum concentration is 300mg/m3, it is known that, Its discharge standard has complied fully with above-mentioned regulation, also, has received good clarifying smoke effect, has good popularization and application Value.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution of the prior art Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structure diagram for the specific embodiment for representing cleaning steam production combustion system provided by the invention.
Fig. 2 is to represent to apply cleaning steam provided by the invention production combustion system into the pot in rated capacity 40t/h The smoke components concentration table in atmospheric environment is drained into when in stove in time.
Reference numeral：1- flue gas recirculation channels；2- flue gas recirculation channel solenoid valves；3- desulfurizing tower exhaust passage solenoid valves.
Specific embodiment
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation Example is part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill Personnel's all other embodiments obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " " center ", " on ", " under ", "left", "right", " vertical ", The orientation or position relationship of the instructions such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to Convenient for the description present invention and simplify description rather than instruction or imply signified device or element must have specific orientation, With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ", " third " is only used for description purpose, and it is not intended that instruction or hint relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition Concrete meaning in invention.
Below according to the overall structure of cleaning steam provided by the invention production combustion system, its specific embodiment is carried out Explanation.
Fig. 1 is the structure diagram for the specific embodiment for representing cleaning steam production combustion system provided by the invention.
As shown in Figure 1, the cleaning steam produces combustion system, using coal as fuel, there is burning boiler and fume treatment Unit.
Specifically, fume treatment unit includes：Selective non-catalytic reduction denitrification apparatus, for the stove of burning boiler Thorax internal spray reducing agent；The furnace outlet connection of cyclone separator, entrance and burning boiler；Sack cleaner, entrance and rotation The gas vent connection of wind separator；The gas vent connection of magnesia FGD tower, air inlet and sack cleaner；Chimney enters Mouth is connect by desulfurizing tower exhaust passage with the gas vent of magnesia FGD tower, and outlet is connected with external environment.
Above-mentioned fume treatment unit further includes circulation dust collector, and circulation dust collector has 1 He of flue gas recirculation channel The gas componant detection controller being arranged on desulfurizing tower exhaust passage.One end of flue gas recirculation channel 1 and sack cleaner Entrance connects, and the other end of flue gas recirculation channel 1 is detected with the gas componant on desulfurizing tower exhaust passage under the exhaust of controller Trip connection, is equipped with flue gas recirculation channel solenoid valve 2, on desulfurizing tower exhaust passage and flue gas on flue gas recirculation channel 1 Desulfurizing tower exhaust passage solenoid valve 3, flue gas recirculation channel electromagnetism are installed on the exhaust downstream of the other end connection of circulation canal 1 Valve 2 and desulfurizing tower exhaust passage solenoid valve 3 are connect respectively with gas componant detection controller.
Further, above-mentioned fume treatment unit further includes clinker treater, and clinker treater includes and whirlwind The lag cooler of the solid outlet connection of separator and the slag storehouse being connect by conveyer with lag cooler.
In addition, cleaning steam production combustion system further includes the indoor coal storage yard set gradually, first to coal unit, coal crushing Machine and second gives coal unit.
First includes reciprocating coal feeder and the rolling being connect by the first conveying device with reciprocating coal feeder to coal unit Axis sieves, and the output terminal of roller picker and the input terminal of coal crusher connect；Second includes coal scuttle and input terminal and coal to coal unit The Gravimetric Coal Feeders of the output terminal connection of bucket, the output terminal of coal crusher are defeated by the second conveying device and Gravimetric Coal Feeders Enter end connection, the output terminal of Gravimetric Coal Feeders and the feeding mouth of burning boiler connect.
Further, heating, drying machine device is respectively arranged in the inside of indoor coal storage yard and coal scuttle, the heating, drying device It can be hot-air drier etc..
In addition, above-mentioned the first conveying device and the second conveying device is respectively belt-type conveying device.
In addition, the nozzle of selective non-catalytic reduction denitrification apparatus is arranged on dividing with whirlwind for the furnace outlet of burning boiler The position of entrance connection from device.
In addition, it is pulsed jet cloth filter to set above-mentioned sack cleaner.
In addition, it is provided with flue gas reheat between the gas vent of magnesia FGD tower and the entrance of desulfurizing tower exhaust passage Device.
In addition, cleaning steam production combustion system further includes the ash of the solid outlet connection of entrance and sack cleaner Storehouse is provided with pneumatic ash conveying plant between the solid outlet of sack cleaner and the entrance of ash cellar.
In addition, it is provided with air-introduced machine between the gas vent of sack cleaner and the air inlet of magnesia FGD tower.
The burning boiler that the present invention uses can be circulating fluidized bed boiler.
The structure of the specific embodiment of cleaning steam provided by the invention production combustion system is illustrated above, under Face illustrates its operational process.
Before coming into operation to cleaning steam production combustion system, desulfurizing tower exhaust passage solenoid valve is closed, to the steam Clean manufacturing combustion system comes into operation, can be by SNCR denitration device in operational process, i.e., above-mentioned selective non-catalytic is also Former denitrification apparatus to spraying reducing agent in burner hearth, so as to carry out the reduction of selectivity to the nitrogen oxides in the flue gas of generation, leads to Often, the reducing agent used is ammonia or urea, when using ammonia as reducing agent, generates following reactions：4NH3+4NO+O2→4N2+ 6H2O when using urea as reducing agent, then generates following reactions：NO+CO (NH2) 2+1/2O2 → 2N2+CO2+H2O, from And reach denitration purpose.
Flue gas after above-mentioned SNCR denitration device denitration is entered in cyclone separator, is detached by cyclone separator, point Solid particle from generation is entered in ash cellar and is utilized for subsequent processing；The gas of generation is detached from the outlet of cyclone separator Mouth enters further dedusting in sack cleaner, the gas after sack cleaner dedusting enter in magnesia FGD tower into Row flue gas desulfurization by magnesia wet method, in magnesia FGD tower, MgO slurries absorb the SO2 in flue gas, generate aqueous magnesium sulfite And magnesium sulfate.
The pre- gas being discharged in atmospheric environment after above-mentioned magnesia FGD tower carries out flue gas desulfurization by magnesia wet method It enters in flue gas recirculation channel, and the gas componant by being arranged on desulfurizing tower exhaust passage detects controller to above-mentioned walkthrough The content of the gas componants such as the sulfur dioxide gone out in the gas into atmospheric environment is detected, in sulfur dioxide detected etc. For the content of gas componant higher than setting when discharging content, the control unit of gas componant detection controller controls flue gas recirculation Channel solenoid valve is opened, and the above-mentioned pre- gas being discharged in atmospheric environment returns to weight in sack cleaner from flue gas recirculation channel Multiple dedusting, flue gas desulfurization by magnesia wet method process, until when discharging content of setting is reached or fallen below, gas componant detection The control unit control flue gas recirculation channel solenoid valve of controller is closed, and desulfurizing tower exhaust passage solenoid valve is opened, and meets discharge It is required that gas can be from smoke stack emission to atmospheric environment.
It should be strongly noted that above-mentioned gas componant detection controller can be by being respectively provided with detection function and control work( Two single devices of energy are electrically connected, alternatively, being formed as the integrated equipment simultaneously with detection unit and control unit.
After the present invention comes into operation, smoke components can effectively be purified, so as to make to drain into the gas in atmospheric environment Body meets sets requirement.
In addition, in above-mentioned specific embodiment, setting fume treatment unit further includes clinker treater, at clinker It manages device and includes the lag cooler being connect with the solid outlet of cyclone separator and the slag storehouse being connect by conveyer with lag cooler, from And cooling collection is carried out to the solid that cyclone separator is isolated.
In addition, during by boiler for producing steam, due to coal volume of fuel is big, humidity is high etc., cause existing Have that coal-burning boiler is insufficient to the burning of coal, be harmful into so as to further increase carbon monoxide in discharge flue gas etc. Point, meanwhile, the problem of having coal fuel availability low, waste coal resources.
In this regard, in above-mentioned specific embodiment, setting cleaning steam produces combustion system and further includes what is set gradually Indoor coal storage yard, first give coal unit to coal unit, coal crusher and second.First includes reciprocating coal feeder to coal unit and leads to The roller picker that the first conveying device is connect with reciprocating coal feeder is crossed, the output terminal of roller picker and the input terminal of coal crusher connect It connects；Second includes the Gravimetric Coal Feeders that coal scuttle and the output terminal of input terminal and coal scuttle connect to coal unit, coal crusher it is defeated Outlet is connected by the input terminal of the second conveying device and Gravimetric Coal Feeders, the output terminal of Gravimetric Coal Feeders and entering for burning boiler Material mouth connects.
Coal can be carried out fully to crush by roller picker and coal crusher as a result, so as to make to enter burning boiler Burner hearth in coal for little particle coal dust, and then coal is made fully to burn, improves the combustion utilization efficiency of coal, reduce by an oxidation The yield of the pernicious gases such as carbon.
In practical applications, independent design can be further carried out to the sieve of roller picker, meanwhile, increase between adjacent sieve Gap, to increase screen size, so as to avoid viscous coal, chute blockage phenomenon；In addition, it can also be set in the upper surface of the rack of indoor coal storage yard Drainage trough is put, so as to carry out water conservancy diversion to liquid such as rainwater in time.
In addition, in above-mentioned specific embodiment, heating, drying machine is respectively arranged in the inside of indoor coal storage yard and coal scuttle Device, so as to be heated to coal dust, ensure that bunker coal has dry storage condition.
In addition, in above-mentioned specific embodiment, by the way that the nozzle of selective non-catalytic reduction denitrification apparatus is set At the position being connect with the entrance of cyclone separator of the furnace outlet of burning boiler, so that it is guaranteed that reducing agent at 850 DEG C extremely It is sprayed within the temperature range of 1100 DEG C to burner hearth inside, it is ensured that the uninterrupted progress of denitration reaction.
In addition, in above-mentioned specific embodiment, setting sack cleaner is pulsed jet cloth filter, common with using Sack cleaner is compared, and action of low-voltage pulse technology is combined with common bag type dust removing technology, in the base of common sack cleaner On plinth, there is the processing gas ability of higher purification efficiency and bigger, and with performance is stable, easy to operate, life-span of the filter bag Long, the advantages that maintenance load is small.
In addition, the gas temperature carried out due to oxidized magnesium desulfurizing tower after flue gas desulfurization by magnesia wet method is in 44 DEG C to 55 Between DEG C, it is saturation state, has been less than acid dew point, if being directly discharged in atmospheric environment that following negative consequence can be brought, 1. Plume rise diffusivity is low, can be formed about water mist in chimney, pollute environment；2. because of flue-gas temperature in dew point hereinafter, having Acid drop condenses out from flue gas, forms " acid rain " phenomenon, not only can cause environmental pollution, but also desulfurizing tower can be vented logical Road and inner wall of stack cause corrosion etc..
In this regard, in above-mentioned specific embodiment, in gas vent and the desulfurizing tower exhaust passage of magnesia FGD tower Entrance between be provided with smoke re-heater, as a result, using the smoke re-heater by oxidized magnesium desulfurizing tower carry out magnesia The temperature of gas after wet process of FGD is discharged after being heated to 80 DEG C or more of temperature, can further set the smoke re-heater With thermostatic controller, so as to which the temperature for ensureing the gas after oxidized magnesium desulfurizing tower progress flue gas desulfurization by magnesia wet method is protected It holds between 80 DEG C to 100 DEG C, to avoid flue-gas temperature in dew point hereinafter, causing corruption to desulfurizing tower exhaust passage and inner wall of stack Erosion, while atmosphere hoist height is improved, the diffusivity of flue gas is improved, meanwhile, avoid exhaust temperature excessively high.
In addition, in above-mentioned specific embodiment, cleaning steam production combustion system further includes entrance and is removed with pocket type The ash cellar of the solid outlet connection of dirt device, sets Pneumatic ash conveying to fill between the solid outlet of sack cleaner and the entrance of ash cellar It puts, compared with setting screw conveyor or other conventional machinery ash conveying devices such as embedded scraper transporter or bucket elevator, strength Ash conveying device has the advantages that the following：1. equipment is simple, floor space is small, convenient for arrangement；2. landline can arbitrarily be chosen, Transfer passage can it is horizontal, tilt or be arranged vertically, flexible arrangement；3. easily carrying out the automation of group's disk, required operations staff is few；④ Convenient for pinpointing conveying over long distances and carrying out collecting medium by the lime-ash of each ash disposal point of dispersion.
In addition, in above-mentioned specific embodiment, sack cleaner gas vent and magnesia FGD tower into Air-introduced machine is provided between gas port, so as to which the air that can accelerate the gas vent outflow from sack cleaner rapidly enters oxidation In magnesium desulfurizing tower, so as to improve desulfuration efficiency.
In addition, in above-mentioned specific embodiment, it is respectively belt to set the first conveying device and the second conveying device Formula conveying device, as a result, with the advantageous effect that equipment installation is simple, transmission process is quick and smooth.
Fig. 2 is to represent to apply cleaning steam provided by the invention production combustion system into the pot in rated capacity 40t/h The smoke components concentration table in atmospheric environment is drained into when in stove in time.
As shown in Fig. 2, by volume is put into according to the cleaning steam of the structure setting of above-mentioned technical proposal production combustion system Determine evaporation capacity 40t/h boiler carry out use after, the gas content that it is finally discharged is detected, wherein, particle in flue dust Object concentration be in 10mg/m3 hereinafter, sulfur dioxide concentration be in 80mg/m3 hereinafter, nitrous oxides concentration be in 200mg/m3 with Under, according to《Emission standard of air pollutants for boilers GB13271-2014》Regulation, from 1 day July in 2014, newly constructed boiler , it is specified that rated capacity should meet in the exhaust content of the coal-burning boiler of more than 10t/h in Air Pollutant Emission concentration limit： Particulate matter maximum concentration is 50mg/m3, and sulfur dioxide maximum concentration is 300mg/m3, and nitrogen oxides maximum concentration is 300mg/ M3, it is known that, discharge standard has complied fully with above-mentioned regulation, also, has received good clarifying smoke effect, has good Application value.
In addition, in above-mentioned specific embodiment, the concrete structure of the present invention is illustrated, but not limited to this.
For example, in above-mentioned specific embodiment, setting fume treatment unit further includes clinker treater, at clinker It manages device and includes the lag cooler being connect with the solid outlet of cyclone separator and the slag storehouse being connect by conveyer with lag cooler.But This is not limited to, above-mentioned lag cooler can not also be set, and the solid outlet of cyclone separator is made directly to be connect with slag storehouse, together Sample can reach the collecting function to solid slag, still, according to the structure in specific embodiment, set above-mentioned cold slag Machine can make slag charge be cooled before slag storehouse is entered, and so as to which slag storehouse be avoided to deform under high temperature environment, and then extend slag storehouse Service life, meanwhile, convenient for carrying out subsequent processing to the slag charge in slag storehouse.
In addition, in above-mentioned specific embodiment, setting cleaning steam produces combustion system and further includes what is set gradually Indoor coal storage yard, first give coal unit to coal unit, coal crusher and second.First includes reciprocating coal feeder to coal unit and leads to The roller picker that the first conveying device is connect with reciprocating coal feeder is crossed, the output terminal of roller picker and the input terminal of coal crusher connect It connects；Second includes the Gravimetric Coal Feeders that coal scuttle and the output terminal of input terminal and coal scuttle connect to coal unit, coal crusher it is defeated Outlet is connected by the input terminal of the second conveying device and Gravimetric Coal Feeders, the output terminal of Gravimetric Coal Feeders and entering for burning boiler Material mouth connects.
But not limited to this, can not also set above-mentioned roller picker and coal crusher, and only by conveying device Coal fuel in indoor coal storage yard is fed through in burning boiler and is burnt, still, is set according to the structure in specific embodiment Above-mentioned roller picker and coal crusher are put, coal can be carried out fully to crush by roller picker and coal crusher as a result, from And make to enter the coal in the burner hearth of burning boiler for little particle coal dust, and then coal is made fully to burn, improve the combustion of coal Utilization rate is burnt, reduces the yield of the pernicious gases such as carbon monoxide.
In addition, in above-mentioned specific embodiment, heating, drying machine is respectively arranged in the inside of indoor coal storage yard and coal scuttle Device, but not limited to this, can not also set above-mentioned heating, drying device, be equally reached above-mentioned control exhaust into Divide the function of concentration, still, according to the structure in specific embodiment, above-mentioned heating, drying device is set, can be added by this Heating drier heats coal dust, ensures that bunker coal has dry storage condition.
In addition, in above-mentioned specific embodiment, the nozzle of selective non-catalytic reduction denitrification apparatus is arranged on combustion The position being connect with the entrance of cyclone separator of the furnace outlet of burning boiler, but not limited to this or, will selectivity The nozzle of non-catalytic reduction denitrification apparatus is arranged on other positions of the furnace wall of burning boiler, as long as can ensure that its temperature can lead to Quantity combusted etc. is crossed to adjust within the temperature range of 850 DEG C to 1100 DEG C, still, according to the structure in specific embodiment, The nozzle of setting selective non-catalytic reduction denitrification apparatus is located at the entrance with cyclone separator of the furnace outlet of burning boiler The position of connection, so as to can ensure that reducing agent is sprayed within the temperature range of 850 DEG C to 1100 DEG C to burner hearth inside always, Ensure the uninterrupted progress of denitration reaction.
In addition, in above-mentioned specific embodiment, setting sack cleaner is pulsed jet cloth filter, but is not limited to This, which can also be common sack cleaner, equally with dust removing effects, still, with common pocket type is used to remove Dirt device is compared, and the sack cleaner is set as pulsed jet cloth filter, by action of low-voltage pulse technology and common bag type dust removing technology It is combined, on the basis of common sack cleaner, there is the processing gas ability of higher purification efficiency and bigger, and have The advantages that performance is stable, easy to operate, life-span of the filter bag is long, maintenance load is small.
In addition, in above-mentioned specific embodiment, in gas vent and the desulfurizing tower exhaust passage of magnesia FGD tower Entrance between be provided with smoke re-heater, but not limited to this, can not also set above-mentioned smoke re-heater, and will meet The gas of the discharge standard of setting is directly discharged into atmospheric environment, still, since oxidized magnesium desulfurizing tower carries out magnesia wet method Gas temperature after flue gas desulfurization is between 44 DEG C to 55 DEG C, is saturation state, has been less than acid dew point, if being directly discharged to Following negative consequence can be brought in atmospheric environment, 1. plume rise diffusivity is low, can be formed about water mist in chimney, pollute ring Border；2. because flue-gas temperature condenses out in dew point hereinafter, having acid drop from flue gas, " acid rain " phenomenon is formed, it both can be right Environment pollutes, and corrosion etc. can be caused to desulfurizing tower exhaust passage and inner wall of stack.
And above-mentioned smoke re-heater is set, oxidized magnesium desulfurizing tower can be carried out to the gas after flue gas desulfurization by magnesia wet method The temperature of body is discharged after being heated to 80 DEG C or more of temperature, to avoid flue-gas temperature in dew point hereinafter, to desulfurizing tower exhaust passage It causes to corrode, while improve atmosphere hoist height with inner wall of stack, improves the diffusivity of flue gas.
In addition, in above-mentioned specific embodiment, cleaning steam production combustion system further includes entrance and is removed with pocket type The ash cellar of the solid outlet connection of dirt device, sets Pneumatic ash conveying to fill between the solid outlet of sack cleaner and the entrance of ash cellar It puts, but not limited to this or with other conventional machineries such as screw conveyor or embedded scraper transporter or bucket elevator Ash conveying device conveys dust granule instead of above-mentioned pneumatic ash conveying plant, still, is scraped with setting screw conveyor or burying Other conventional machinery ash conveying devices such as plate conveyer or bucket elevator are compared, and pneumatic ash conveying plant has the advantages that the following： 1. equipment is simple, floor space is small, convenient for arrangement；2. landline can arbitrarily be chosen, transfer passage can horizontal, inclination or vertical Arrangement, flexible arrangement；3. easily carrying out the automation of group's disk, required operations staff is few；4. fixed point over long distances is convenient for convey and will The lime-ash of each ash disposal point of dispersion carries out collecting medium.
In addition, in above-mentioned specific embodiment, sack cleaner gas vent and magnesia FGD tower into Air-introduced machine is provided between gas port, but not limited to this, can not also set above-mentioned air-introduced machine, the gas in sack cleaner It can equally enter in magnesia FGD tower, still, according to the structure in specific embodiment, above-mentioned air-introduced machine is set, it can Accelerate to rapidly enter in magnesia FGD tower from the air that the gas vent of sack cleaner flows out, so as to improve desulfuration efficiency.
In addition, in above-mentioned specific embodiment, it is respectively belt to set the first conveying device and the second conveying device Formula conveying device, but not limited to this, and it is respectively pipeline that can also set the first above-mentioned conveying device and the second conveying device Formula conveying device or respectively steel belt conveyer are respectively to manage with the first conveying device of setting and the second conveying device still Road formula conveying device is compared, and the first conveying device and the second conveying device are respectively set to belt-type conveying device, is had and is set It is standby that the advantageous effect simpler, transmission process is more quick and smooth is installed, and it has noise compared with steel belt conveyer The advantages that small, low cost.
In addition, the cleaning steam production combustion system of the present invention, can be composed of the various structures of the above embodiment, Above-mentioned effect can equally be played.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into Row equivalent replacement；And these modifications or replacement, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution The range of scheme.

Claims (10)

1. a kind of cleaning steam produces combustion system, using coal as fuel, which is characterized in that
With burning boiler and fume treatment unit,
The fume treatment unit includes：
Selective non-catalytic reduction denitrification apparatus, for the burner hearth internal spray reducing agent of the burning boiler；
Cyclone separator, entrance are connect with the furnace outlet of the burning boiler；
Sack cleaner, entrance are connect with the gas vent of the cyclone separator；
Magnesia FGD tower, air inlet are connect with the gas vent of the sack cleaner；
Chimney, entrance are connect by desulfurizing tower exhaust passage with the gas vent of the magnesia FGD tower, outlet and external rings Border connects；
The fume treatment unit further includes circulation dust collector, and the circulation dust collector has flue gas recirculation channel and setting Gas componant detection controller on the desulfurizing tower exhaust passage,
One end of the flue gas recirculation channel is connect with the entrance of the sack cleaner, the other end of the flue gas recirculation channel With the exhaust downstream connection of the gas componant detection controller on the desulfurizing tower exhaust passage, lead in the flue gas recirculation Flue gas recirculation channel solenoid valve is installed on road, it is another with the flue gas recirculation channel on the desulfurizing tower exhaust passage It holds and desulfurizing tower exhaust passage solenoid valve, the flue gas recirculation channel solenoid valve and the desulfurization is installed on the exhaust downstream of connection Tower exhaust passage solenoid valve is connect respectively with gas componant detection controller.
2. combustion system is produced according to the cleaning steam described in claim 1, which is characterized in that the fume treatment unit is also Including clinker treater, the clinker treater include the lag cooler that is connect with the solid outlet of the cyclone separator and The slag storehouse being connect by conveyer with the lag cooler.
3. combustion system is produced according to the cleaning steam described in claim 1, which is characterized in that the cleaning steam production combustion Burning system further includes the indoor coal storage yard set gradually, first to coal unit, coal crusher and second to coal unit,
Described first includes reciprocating coal feeder to coal unit and is connect by the first conveying device with the reciprocating coal feeder Roller picker, the output terminal of the roller picker connect with the input terminal of the coal crusher；
Described second Gravimetric Coal Feeders being connect to coal unit including coal scuttle and input terminal with the output terminal of the coal scuttle, the coal The output terminal of charcoal crusher is connect by the second conveying device with the input terminal of the Gravimetric Coal Feeders coal crusher, the title The output terminal of weight feeder is connect with the feeding mouth of the burning boiler.
4. combustion system is produced according to the cleaning steam described in claim 3, which is characterized in that in the indoor coal storage yard and described The inside of coal scuttle is respectively arranged with heating, drying machine device.
5. combustion system is produced according to the cleaning steam described in claim 1, which is characterized in that the selective non-catalytic is also The nozzle of former denitrification apparatus is arranged on the portion being connect with the entrance of the cyclone separator of the furnace outlet of the burning boiler Position.
6. combustion system is produced according to the cleaning steam described in claim 1, which is characterized in that the sack cleaner is arteries and veins Rush bag filter.
7. combustion system is produced according to the cleaning steam described in claim 1, which is characterized in that in the magnesia FGD tower Gas vent and the desulfurizing tower exhaust passage entrance between be provided with smoke re-heater.
8. combustion system is produced according to the cleaning steam described in claim 1, which is characterized in that further include entrance and the bag The ash cellar of the solid outlet connection of formula deduster, sets between the solid outlet of the sack cleaner and the entrance of the ash cellar It is equipped with pneumatic ash conveying plant.
9. combustion system is produced according to the cleaning steam described in claim 1, which is characterized in that in the sack cleaner Air-introduced machine is provided between the air inlet of gas vent and the magnesia FGD tower.
10. combustion system is produced according to the cleaning steam described in claim 3, which is characterized in that first conveying device It is respectively belt-type conveying device with second conveying device.
CN201810051267.1A 2018-01-18 2018-01-18 Cleaning steam produces combustion system Pending CN108253407A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106377971A (en) * 2016-11-07 2017-02-08 河南科技学院 Tail gas carbon collecting and compressing system of nuclear power plant
CN206496338U (en) * 2017-01-12 2017-09-15 浙江城建煤气热电设计院有限公司 A kind of co-generation unit under superhigh temperature super-pressure parameter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106377971A (en) * 2016-11-07 2017-02-08 河南科技学院 Tail gas carbon collecting and compressing system of nuclear power plant
CN206496338U (en) * 2017-01-12 2017-09-15 浙江城建煤气热电设计院有限公司 A kind of co-generation unit under superhigh temperature super-pressure parameter

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