CN205796946U - Coal-fired flue-gas wet type desulfurizing denitration and the combined integrated gasifying device of dedusting - Google Patents

Coal-fired flue-gas wet type desulfurizing denitration and the combined integrated gasifying device of dedusting Download PDF

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Publication number
CN205796946U
CN205796946U CN201620593829.1U CN201620593829U CN205796946U CN 205796946 U CN205796946 U CN 205796946U CN 201620593829 U CN201620593829 U CN 201620593829U CN 205796946 U CN205796946 U CN 205796946U
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dedusting
coal
gas
denitration
flue gas
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CN201620593829.1U
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于洪海
李超
曲立涛
齐晓辉
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Huadian Electric Power Research Institute Co Ltd
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Huadian Electric Power Research Institute Co Ltd
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Abstract

This utility model provides a kind of coal-fired flue-gas wet type desulfurizing denitration and the combined integrated gasifying device of dedusting, can effectively process various rich in dust, nitrogen oxides, the complex waste gas of sulfur dioxide, reduce the exhaust temperature of flue gas, it is possible to the waste liquid after processing is carried out recycling, beneficially environmental protection.This utility model includes air intake installation, air-out apparatus and reaction tower;Air intake installation includes air inlet main line, in line bye-pass, flue gas blower fan, by-pass switch and flue gas heater;Air inlet main line is connected with the gas approach of reaction;Flue gas blower fan and flue gas heater are arranged on air inlet main line;In line bye-pass is connected with air inlet main line, and both junctions are between flue gas blower fan and flue gas heater;By-pass switch is arranged on in line bye-pass;Air-out apparatus includes outlet pipe, heat exchanger and blowdown stack;Outlet pipe one end is connected with the entrance of blowdown stack, and the other end is connected with the exhanst gas outlet of reaction tower;Heat exchanger is arranged on outlet pipe.

Description

Coal-fired flue-gas wet type desulfurizing denitration and the combined integrated gasifying device of dedusting
Technical field
This utility model relates to a kind of coal-fired flue-gas wet type desulfurizing denitration and the combined integrated gasifying device of dedusting.
Background technology
China is a developing country with coal as main energy sources, along with socioeconomic development, and annual directly use Coal in burning reaches more than 1,200,000,000 tons, and recently as economic fast development and the propelling of process of industrialization, waste gas discharges Amount continues to increase, inhalable particulates grain thing, carbon dioxide, nitrogen oxides, sulfur dioxide and other minimum gas contained in air Element pollution thing causes air quality constantly to decline, and gives off substantial amounts of pollutant, cause in some areas after coal burning Acid rain, serious endanger ecological environment, is discharged in the dust of air the proportion shared by fine dust and the most greatly and is again Dust endangers the most serious, therefore, improves the removal efficiency to fine dust so that it is concentration of emission reaches environmental standard, Reduce human body and the harm of environment, be the task of top priority of dust removal field.
Within 1992, having tried sulfur dioxide (SO2) emissions toll administration in 2 cities of province 9, in February, 1998, State Council held " carbon dioxide Emission control district and acid rain control district news conference ", clearly announce Acid Rain Zone scope and Management strategy.After nineteen ninety-five revises, Clear and definite regulation has been done in sulfur dioxide (SO2) emissions by revision " Air Pollution Prevention Law " once again in 1999.Electric pollution causes already The highest attention of relevant government department, State Environmental Protection Administration, State Economic and Trade Commission etc. successively promulgate " thermal power plant's Air Pollutant Emission Standard ", the administrative regulation such as " flue gas desulphurization key technology with home-made equipment Planning Points ", and use policy regulation and Economic lever promotes Thermal Power Enterprises to implement environmental practice, to realizing the policy that power industry develops to environmental protection, the most also Propose the target of power plant desulfurization denitration dust collecting integral production domesticization.The dust emission of the thermal power industry newly implemented for 2012 Standard makes major part cleaner unit at present be difficult to reach discharge standard, and major part enterprise has to prolong on original dust catcher foundation Long cleaner body length, causes traditional structure cleaner unit bulky too fat to move, and steel consumption is serious, equipment one-time investment Greatly;Complex operation, processing cost increase.
At present, the fume desulphurization method that domestic and international application is tested between commercial production and well afoot is the most, totally On can be divided three classes: i.e. with aqueous solutions of absorbent washing flue gas wet process of FGD;Absorbent slurry absorbs sulfur and is dried Semidry method;And directly spray the dry flue gas desulphurization of calcium-based sorbent powder.
But take above-mentioned several electric power desulphurization denitration dedusting method, still there are the following problems:
Technical method becomes old apparatus cost high: power environment protection device slowly fails installation and operation and makes mainly due to device Valency is high, and such as, the medium-sized power plant of installed capacity about 600,000 kilowatts, with the cost of 250 yuan/kilowatt, desulphurization plant Investment takes around 1.5 hundred million yuan;Within 1 year, need desulfurization 1.25 ten thousand tons, with the desulfurization operation cost calculation of 1000 yuan/ton, desulfurization The annual operating and maintenance cost of device is also more than 10,000,000, and in the case of coal price is the most surging, electricity power enterprise is in the face of high Desulphurization cost, and the raising of cost of electricity-generating can not synchronize in electricity price, and country proposes the desulfurization of often degree electricity price markup 0.02 yuan Expense, more inadaptable country advocates the developing policy of recycling economy.
Desulfurization and dedusting its thing of each row: electric field considers that in environmental protection dedusting is many, does not recognize flue dust rich in various metals Oxide, the desulfurizing agent that it is the best, owing to respectful tiger causes the wasting of resources.And electrostatic dust collection equipment investment is the least.Especially Being that running expense more can not be ignored and do not remembers, dust content is under normal circumstances: 20000mg/m3.Wherein there is desulfidation metal Oxide accounts for about 50%.This is also considerable resource, and the most effectively utilizes.Secondly it is considered that desulfurization, this is because desulfurization is thrown Zi great electricity power enterprise oneself cannots call one's soul on one's own, so match of joining in an open competition on power environment protection, dedusting before this is exactly desulfurization immediately after.Right Desulfurization and dedusting is not combined and considers, defines and concentrates on one thing only.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency present in prior art, and provides a kind of structure design to close Reason coal-fired flue-gas wet type desulfurizing denitration and the combined integrated gasifying device of dedusting, can effectively process various rich in dust, nitrogen oxides, The complex waste gas of sulfur dioxide, reduces the exhaust temperature of flue gas simultaneously, and the waste liquid after processing can be carried out recycling, And beneficially environmental protection.
The technical scheme in the invention for solving the above technical problem is: a kind of coal-fired flue-gas wet type desulfurizing denitration and removing The combined integrated gasifying device of dirt, it is characterised in that: include air intake installation, air-out apparatus and reaction tower;Air intake installation includes air inlet master Pipeline, in line bye-pass, flue gas blower fan, by-pass switch and flue gas heater;Air inlet main line is connected with the gas approach of reaction; Flue gas blower fan and flue gas heater are arranged on air inlet main line;In line bye-pass is connected with air inlet main line, and both Junction is between flue gas blower fan and flue gas heater;By-pass switch is arranged on in line bye-pass;Air-out apparatus includes Air pipe, heat exchanger and blowdown stack;Outlet pipe one end is connected with the entrance of blowdown stack, the other end and the cigarette of reaction tower Gas outlet connects;Heat exchanger is arranged on outlet pipe.
Reaction tower described in the utility model is from being upwards disposed with dedusting layer, denitration layer, desulfurization layer and soda pop at the bottom of tower Stratum disjunctum.
Anticorrosion inwall it is provided with in reaction tower described in the utility model.
Denitration layer described in the utility model and desulfurization layer are equipped with spray liquid interface and spray reaction unit, and are circumscribed with Spray liquid feedway.
The external spray liquid feedway of denitration layer described in the utility model is limestone slurry liquid pump.
The external spray liquid feedway of desulfurization layer described in the utility model is desulfurization water liquid pump.
Reaction tower described in the utility model is additionally provided with doctor solution spray equipment and doctor solution stores groove;Doctor solution sprays Device is positioned at above desulfurization layer, and doctor solution stores groove and is positioned at below desulfurization layer.
This utility model is provided with spray liquid accumulator tank below denitration layer, and spray liquid accumulator tank is circumscribed with recovered liquid and processes Processing unit (plant).
Recovered liquid processing device described in the utility model includes at solid-liquid separator, drying and dehydrating device and product Reason unit, solid-liquid separator, drying and dehydrating device, product treatment unit are sequentially connected with.
Steam-water separation layer described in the utility model is provided with vapour liquid separator, and is provided with outside liquid and arranges mouth.
This utility model compared with prior art, has the following advantages and effect: this utility model can solve the problem that existing skill The waste material that art exists is many, seriously polluted, equipment is fragile and is not easily cleaned, and service life is short, and waste disposal fee is high, easily by giving up Produce useless problem, it is achieved that dedusting, the integration of desulphurization and denitration, both processed waste material, decrease to pollute to save again and react former Material, and equipment easy to clean, service life are extended, reduce production cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model embodiment.
Detailed description of the invention
The utility model is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following example are right Explanation of the present utility model and this utility model is not limited to following example.
Seeing Fig. 1, this utility model embodiment includes air intake installation, air-out apparatus and reaction tower 1.
Being provided with anticorrosion inwall in reaction tower 1, bottom is provided with waste outflow pipe.Reaction tower 1 from the bottom of tower the most successively It is provided with dedusting layer 2, denitration layer 3, desulfurization layer 4 and steam-water separation layer 5.
Dedusting layer 2 includes electric precipitation assembly, and it uses electric precipitation assembly to carry out dedusting.Electric precipitation assembly includes dust collecting electrode Plate, discharge electrode, earthing pole, high voltage power supply and be positioned at bottom collecting tank;Collecting polar plate is multiple, becomes array arrangement, adjacent Gap between collecting polar plate is identical with air-flow inflow direction, and dedusting layer 2 bottom is provided with air inlet.
Denitration layer 3 and desulfurization layer 4 are equipped with spray liquid interface and spray reaction unit, and are circumscribed with spray liquid supply dress Put;Being provided with spray liquid accumulator tank 6 below denitration layer 3, spray liquid accumulator tank 6 is circumscribed with recovered liquid processing device simultaneously 7。
Reactive agent in denitration layer 3 is multi-layer plate-type structure, adds the contact area of flue gas.Denitration layer 3 is external Spray liquid feedway is limestone slurry liquid pump 11, is funnel shaped for collecting the spray liquid accumulator tank 6 of lime stone slurry, spray The bottom drenching liquid accumulator tank 6 connects recovered liquid processing device 7 by pipeline.
Reactive agent in desulfurization layer 4 is also multi-layer plate-type structure, adds the contact area of flue gas.Desulfurization layer 4 is external Spray liquid feedway be desulfurization water liquid pump 12.
Reaction tower 1 is additionally provided with doctor solution spray equipment and doctor solution stores groove 13.Doctor solution spray equipment is positioned at desulfurization Above layer 4.Doctor solution stores groove 13 and is positioned at below desulfurization layer 4.
Recovered liquid processing device 7 is used for processing lime stone slurry, its include solid-liquid separator, drying and dehydrating device and Product treatment unit, solid-liquid separator, drying and dehydrating device, product treatment unit are sequentially connected with.Solid-liquid separator and drying and dehydrating Device is used for separating solid product and forms product,
Steam-water separation layer 5 is provided with vapour liquid separator, and is provided with outside liquid and arranges mouth.
Air intake installation includes air inlet main line, in line bye-pass, flue gas blower fan 8, by-pass switch 9 and flue gas heater 15.
Air inlet main line is connected with the gas approach of reaction tower 1.
Flue gas blower fan 8 and flue gas heater 15 are arranged on air inlet main line.
In line bye-pass is connected with air inlet main line, and both junctions are positioned at flue gas blower fan 8 and flue gas heater Between 15, and by-pass switch 9 is arranged on in line bye-pass, is used for controlling smoke directly ventilating.
Air-out apparatus includes outlet pipe, heat exchanger 10 and blowdown stack 14.
Outlet pipe one end is connected with the entrance of blowdown stack 14, and the other end is connected with the exhanst gas outlet of reaction tower 1.
Heat exchanger 10 is arranged on outlet pipe, for reducing the temperature of flue gas.Heat exchanger 10 is array fire-tube type Heat exchanger, it includes the water tank of an outsourcing, and the water in water tank is flowing capable of circulation under the effect of water pump, arranges in water tank Having the snakelike fire tube of multiple array arrangement, fire Bottomhole pressure flue gas, fire tube is immersed in the water of water tank, carries out heat by fire tube wall Exchange, reaches the effect of cooled flue gas.
Principle of the present utility model is:
First, in waste gas enters dedusting layer 2, dust sinks to periodic exhaustion in collecting tank along collecting polar plate and goes out;Waste gas continues The continuous denitration liquid risen with the ejection of denitration liquid spray equipment contacts, and the nitrogen oxides in gas and lime stone slurry occur chemistry anti- Should, reaction product flows into denitration liquid with denitration liquid and stores in groove, and is recovered liquid processing device 7 and processes;Gas Continuing to rise the doctor solution with the ejection of doctor solution spray equipment to contact, the sulfur dioxide in gas and doctor solution occur chemistry anti- Should, reaction product flows into doctor solution with doctor solution and stores in groove 13;Gas is subsequently into the vapor-liquid separation of steam-water separation layer 5 Device, the drop in gas is here blocked;Then gas enter activated carbon absorber, the material being mingled with in gas and Drop is intercepted here to be absorbed, and so far waste gas is processed into the gas of cleaning, is then passed through the cooling of heat exchanger 10 Process, qualified discharge can be realized.
Reaction tower 1 of the present utility model integrated design, is not only simple in structure and saves space;Whole reaction tower 1 From top to down, liquid all can be had to flow, form spinning liquid work system such that it is able to make whole system be not susceptible to blocking etc. and ask Topic.
In reaction tower 1 denitration layer 3 under, desulfurization layer 4 can be by the grey emulsion in the product of denitration and desulfurization in upper structure Reaction, prevents nitric acid from discharging to air.
Reactive agent in desulfurization layer 4 and denitration layer 3 uses multi-layer plate-type structure, adds flue gas and denitration layer or desulfurization In Ceng, the response area of liquid, improves reaction effect, bubble-cap foam reaction bonded is got up, and has both prevented bias current, has improved again anti- Answer efficiency.
Arranging anticorrosion inwall in reaction tower 1, it avoids, because of the liquid corrosion inwall in dust-removal and desulfurizing denitrification integral tower, carrying High device service life.
The waste liquid that recovered liquid processing device 7 carries over after processing flue gas processes, and a part is used for continuing Participating in reaction, reduce raw materials for production cost, another part is used for selling, and adds company's benefit.
Furthermore, it is necessary to explanation, the specific embodiment described in this specification, the shape of its parts and components, it is named Titles etc. can be different, and the above content described in this specification is only to this utility model structure example explanation.

Claims (10)

1. a coal-fired flue-gas wet type desulfurizing denitration and the combined integrated gasifying device of dedusting, it is characterised in that: include air intake installation, go out Device of air and reaction tower;Air intake installation includes air inlet main line, in line bye-pass, flue gas blower fan, by-pass switch and flue gas Device;Air inlet main line is connected with the gas approach of reaction;Flue gas blower fan and flue gas heater are arranged on air inlet main line;In line Bye-pass is connected with air inlet main line, and both junctions are between flue gas blower fan and flue gas heater;By-pass switch It is arranged on in line bye-pass;Air-out apparatus includes outlet pipe, heat exchanger and blowdown stack;Outlet pipe one end and discharge The entrance of chimney connects, and the other end is connected with the exhanst gas outlet of reaction tower;Heat exchanger is arranged on outlet pipe.
Coal-fired flue-gas wet type desulfurizing denitration the most according to claim 1 and the combined integrated gasifying device of dedusting, it is characterised in that: Described reaction tower is from being upwards disposed with dedusting layer, denitration layer, desulfurization layer and steam-water separation layer at the bottom of tower.
Coal-fired flue-gas wet type desulfurizing denitration the most according to claim 2 and the combined integrated gasifying device of dedusting, it is characterised in that: Anticorrosion inwall it is provided with in described reaction tower.
Coal-fired flue-gas wet type desulfurizing denitration the most according to claim 2 and the combined integrated gasifying device of dedusting, it is characterised in that: Described denitration layer and desulfurization layer are equipped with spray liquid interface and spray reaction unit, and are circumscribed with spray liquid feedway.
Coal-fired flue-gas wet type desulfurizing denitration the most according to claim 4 and the combined integrated gasifying device of dedusting, it is characterised in that: The external spray liquid feedway of described denitration layer is limestone slurry liquid pump.
Coal-fired flue-gas wet type desulfurizing denitration the most according to claim 4 and the combined integrated gasifying device of dedusting, it is characterised in that: The external spray liquid feedway of described desulfurization layer is desulfurization water liquid pump.
Coal-fired flue-gas wet type desulfurizing denitration the most according to claim 4 and the combined integrated gasifying device of dedusting, it is characterised in that: Described reaction tower is additionally provided with doctor solution spray equipment and doctor solution stores groove;Doctor solution spray equipment is positioned on desulfurization layer Side, doctor solution stores groove and is positioned at below desulfurization layer.
Coal-fired flue-gas wet type desulfurizing denitration the most according to claim 4 and the combined integrated gasifying device of dedusting, it is characterised in that: Being provided with spray liquid accumulator tank below denitration layer, spray liquid accumulator tank is circumscribed with recovered liquid processing device.
Coal-fired flue-gas wet type desulfurizing denitration the most according to claim 8 and the combined integrated gasifying device of dedusting, it is characterised in that: Described recovered liquid processing device includes solid-liquid separator, drying and dehydrating device and product treatment unit, solid-liquid separator, Drying and dehydrating device, product treatment unit are sequentially connected with.
Coal-fired flue-gas wet type desulfurizing denitration the most according to claim 4 and the combined integrated gasifying device of dedusting, its feature exists In: described steam-water separation layer vapour liquid separator is installed, and is provided with outside liquid and arranges mouth.
CN201620593829.1U 2016-06-17 2016-06-17 Coal-fired flue-gas wet type desulfurizing denitration and the combined integrated gasifying device of dedusting Active CN205796946U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107511055A (en) * 2017-08-04 2017-12-26 深圳市玖品空气净化科技有限公司 A kind of high steel-making catalytic converter of purification efficiency

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107511055A (en) * 2017-08-04 2017-12-26 深圳市玖品空气净化科技有限公司 A kind of high steel-making catalytic converter of purification efficiency

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