CN206762618U - A kind of dry-wet integratedization desulfuring and denitrifying apparatus - Google Patents

A kind of dry-wet integratedization desulfuring and denitrifying apparatus Download PDF

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Publication number
CN206762618U
CN206762618U CN201720601533.4U CN201720601533U CN206762618U CN 206762618 U CN206762618 U CN 206762618U CN 201720601533 U CN201720601533 U CN 201720601533U CN 206762618 U CN206762618 U CN 206762618U
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dry
wet
kiln
desulfuring
boiler
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张殿坤
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ANHUI JINSENYUAN ENVIRONMENTAL PROTECTION ENGINEERING CO LTD
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ANHUI JINSENYUAN ENVIRONMENTAL PROTECTION ENGINEERING CO LTD
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The utility model discloses a kind of dry-wet integratedization desulfuring and denitrifying apparatus, including:Boiler or kiln, the implementation place as dry desulfurization denitration process;Absorption tower, the implementation place as wet desulphurization denitration process;Dry method feeding machanism, connected with the boiler or kiln, for adding the scavenger used in dry desulfurization denitration into the boiler or kiln;Wet method feeding machanism, connected with the absorption tower, for adding the scavenger used in wet desulphurization denitration into the absorption tower;Communicating pipe is connected between the boiler or kiln and the absorption tower.The utility model desulphurization denitration ability is strong, and desulfuration efficiency is up to 99%, and denitration efficiency is up to 95%;It disclosure satisfy that country to boiler or the standard of kiln kiln desulphurization denitration minimum discharge, realizes the minimum discharge requirement of national environmental protection;Reduced investment, quick, the substantial amounts of SCR denitration of saving.

Description

A kind of dry-wet integratedization desulfuring and denitrifying apparatus
Technical field
Gas purifying equipment field is the utility model is related to, relates in particular to a kind of dry-wet integratedization desulphurization denitration dress Put.
Background technology
Sulfur-bearing contains nitre in flue gas caused by some production processes, and at present, flue gas desulfurization is mainly inhaled using spray sulfide Liquid is received to absorb the sulfide in flue gas.This mode desulfuration efficiency is low, and implementation cost is high;
And denitrating flue gas (DeNOx) mainly uses SCR (SCR) technology.The technology is using ammonia as reduction Agent, by SCR catalyst, the NOx in flue gas is reduced into the N of nonhazardous2And H2O, so as to reach the purpose of control NOx emission. But this technology SCR denitration dosage is big, and removal effect is bad, can not meet the needs of national minimum discharge.
Utility model content
It is strong that technical problem to be solved in the utility model is to provide a kind of desulphurization denitration ability, saves SCR denitration catalysis The dry-wet integratedization desulfuring and denitrifying apparatus of agent.
In order to solve the above-mentioned technical problem, the utility model adopts the following technical scheme that:A kind of dry-wet integratedization desulfurization takes off Nitre device, including:
Boiler or kiln, the implementation place as dry desulfurization denitration process;
Absorption tower, the implementation place as wet desulphurization denitration process;
Dry method feeding machanism, connected with the boiler or kiln, for adding dry desulfurization into the boiler or kiln Scavenger used in denitration;
Wet method feeding machanism, connected with the absorption tower, for being added into the absorption tower used in wet desulphurization denitration Scavenger;
Communicating pipe is connected between the boiler or kiln and the absorption tower.
Further, deduster is installed on the communicating pipe.
Further, air-introduced machine is installed on the communicating pipe.
Further, the dry method feeding machanism includes desulphurization denitration powder material warehouse, air blower and material mixing module, Lime stone powder material feed pipe and urea powder material feed pipe, the air blast are connected with the desulphurization denitration powder material warehouse Wind is connected between machine and the material mixing module and send pipe, bottom and the wind of the desulphurization denitration powder material warehouse send pipe it Between be connected with the discharge nozzle of more than one, metering feeding device, the material mixing module and institute are installed on the discharge nozzle State and be connected with conveying pipeline between boiler or the burner hearth of kiln.
Further, the wet method feeding machanism includes liquid caustic soda storage tank, tank diameter and desulphurization denitration pond, the liquid caustic soda storage Pass through pipeline communication, the desulphurization denitration between tank and the tank diameter, between the tank diameter and the desulphurization denitration pond Connected between pond and the absorption tower by desulfurization pump.
Further, the wet method feeding machanism includes the ozone interface being connected on communicating pipe.
Further, in addition to mechanism is post-processed, for being discharged to waste material caused by the flue gas after processing and process Processing.
Further, the post processing mechanism includes chimney and more than one sedimentation basin, the chimney and the suction Connected between receipts tower by exhaust pass, the sedimentation basin is connected with the absorption tower by grey ditch.
Further, the sedimentation basin is furnished with oxidation fan, for being passed through air into the sedimentation basin.
Further, the post processing mechanism also includes filter press, and the sedimentation basin passes through Pulp pump and the filter press Connection.
The beneficial effects of the utility model are embodied in:
1. the utility model desulphurization denitration ability is strong, desulfuration efficiency is up to 99%, and denitration efficiency is up to 95%;
2. the utility model carries out in-furnace desulfurization, denitration first using caused high temperature in boiler or kiln burner hearth, do not increase Floor space, do not increase SR;Then by insoluble lower valency nitrogen oxides under conditions of having ozone oxidation For solvable high-valence state nitrogen oxides, then in scrubbing tower with soda solution by nox adsorption, sodium while reaching denitration Aqueous slkali again absorbs sulfur dioxide, reaches the purpose of desulfurization and denitrification integral;
3. the utility model disclosure satisfy that country to boiler or the standard of kiln desulphurization denitration minimum discharge, realizes national ring The minimum discharge requirement of guarantor.
4. the utility model reduced investment, quick, the substantial amounts of SCR denitration of saving.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the utility model one.
Fig. 2 is the main flue gas governance flowchart schematic diagram of the embodiment of the utility model one.
Fig. 3 is the boiler or kiln in-furnace desulfurization, denitration mixed material conveying schematic flow sheet of the embodiment of the utility model one.
Fig. 4 is desulphurization denitration alkali lye circulation process schematic diagram in the absorption tower of the embodiment of the utility model one.
Fig. 5 is the desulphurization denitration product press filtration schematic flow sheet of the embodiment of the utility model one.
In accompanying drawing the mark of each part for:1 boiler or kiln, 2 absorption towers, 31 communicating pipes, 32 dedusters, 33 air-introduced machines, 41 desulphurization denitration powder material warehouses, 411 lime stone powder material feed pipes, 412 urea powder material feed pipes, 42 air blowers, 43 Material mixing module, 44 wind send pipe, 45 discharge nozzles, 46 metering feeding devices, 47 conveyance conduits, 51 liquid caustic soda storage tanks, 52 tank diameters, 53 desulphurization denitration ponds, 54 desulfurization pumps, 55 ozone interfaces, 61 chimneys, 62 sedimentation basins, 63 exhaust pass, 64 grey ditches, 65 oxidation winds Machine, 66 filter presses, 67 Pulp pumps, 7 special transport vehicles.
Embodiment
Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.It should be noted that do not conflicting In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5.
The utility model dry-wet integratedization desulfuring and denitrifying apparatus, including:
Boiler or kiln 1, the implementation place as dry desulfurization denitration process;
Absorption tower 2, the implementation place as wet desulphurization denitration process;
Dry method feeding machanism, connect with the boiler or kiln 1, taken off for adding dry method into the boiler or kiln 1 Scavenger used in sulphur denitration;
Wet method feeding machanism, connected with the absorption tower 2, for adding wet desulphurization denitration institute into the absorption tower 2 Scavenger;
Communicating pipe 31 is connected between the boiler or kiln 1 and the absorption tower 2.
In one embodiment, the dry method feeding machanism includes desulphurization denitration powder material warehouse 41, air blower 42 and material Mixing module 43, lime stone powder material feed pipe 411 and urea powder thing are connected with the desulphurization denitration powder material warehouse 41 Expect feed pipe 412, wind is connected between the air blower 42 and the material mixing module 43 and send pipe 44, the desulphurization denitration powder The bottom of body feed bin 41 and the wind send and the discharge nozzle 45 of more than one are connected between pipe 44, are provided with the discharge nozzle 45 Metering feeding device 46, conveyance conduit 47 is connected between the material mixing module 43 and the burner hearth of the boiler or kiln 1.
During device use, scavenger --- lime stone powder material and urea powder material pass through agstone respectively Body material feed pipe 411 and urea powder material feed pipe 412 enter in desulphurization denitration powder material warehouse 41, the desulfurization that both form Metering feeding device 46 of the denitration mixed material by discharge nozzle 45 and thereon send pipe 44 to enter material mixing module 43, drum through wind Blower fan 42 by air pressurized, using air as power by through the desulphurization denitration mixed material in material mixing module 43 by special conveying Pipeline 47, which is uniformly sent into boiler or the burner hearth of kiln 1, carries out desulfurization and denitrification reaction.42 preferred Roots blower of air blower.
By the dry desulfurization denitration process in boiler or kiln, the flue gas after preliminary purification enters suction through communicating pipe 31 Receive the further processing that tower 2 carries out wet desulphurization denitration.
In one embodiment, deduster 32 is installed on the communicating pipe 31.The effect of deduster is to be used to tentatively filter Fall dust present in flue gas, it is preferable that deduster selects sack cleaner, and such dust can be collected, and prevent from polluting Environment.
In one embodiment, air-introduced machine 33 is installed on the communicating pipe 31.For flue gas and ozone to be pumped into absorption tower.
In one embodiment, the wet method feeding machanism includes liquid caustic soda storage tank 51, tank diameter 52 and desulphurization denitration pond 53, Pass through pipeline between the liquid caustic soda storage tank 51 and the tank diameter 52, between the tank diameter 52 and the desulphurization denitration pond 53 Connection, is connected between the desulphurization denitration pond 53 and the absorption tower 2 by desulfurization pump 54.
Desulphurization denitration alkali lye is measured into tank diameter 52 by alkali liquor storage tank 51, is uniformly sent into desulphurization denitration pond after mixing 53, finally it is sent into by desulfurization pump 54 in absorption tower 2 and carries out desulfurization and denitrification reaction.
In one embodiment, the wet method feeding machanism also includes the ozone interface 55 being connected on communicating pipe 31.So Flue gas after dry type desulfurizing denitration preliminary purification in boiler or kiln is mixed into absorption tower progress after air-introduced machine with ozone The further processing of wet desulphurization denitration.
In one embodiment, in addition to mechanism is post-processed, for being carried out to waste material caused by the flue gas after processing and process Emission treatment.
In one embodiment, the post processing mechanism includes chimney 61 and more than one sedimentation basin 62, the chimney Connected between 61 and the absorption tower 2 by exhaust pass 63, the sedimentation basin 62 is connected with the absorption tower 2 by grey ditch 64 It is logical.
The wet desulphurization denitration process by the dry desulfurization denitration process in boiler or kiln and in absorption tower and depth Flue gas after purification is through exhaust pass 63 from the row of chimney 61 to air;And the desulphurization denitration alkali lye after absorbing then passes through grey ditch 64 Can be that the sedimentation basin 62 matches somebody with somebody oxidation fan 65, for being passed through into the sedimentation basin in specific implementation into sedimentation basin 62 Air, a part of sodium sulfite and natrium nitrosum are oxidized to sodium sulphate and sodium nitrate, and finally precipitated in the bottom of sedimentation basin 62.
In one embodiment, the sedimentation basin 62 and the desulphurization denitration pond 53 are connected, and so after precipitation, sink Upper clear supernate in shallow lake pond 62 can flow into desulphurization denitration pond 53, be recycled hence into absorption tower, greatly improve material utilization Rate;In two or more, each sedimentation basin 62 is arranged in a row the quantity of sedimentation basin 62, and is sequentially connected logical.
In one embodiment, the post processing mechanism also includes filter press 66, the sedimentation basin 62 by Pulp pump 67 and The filter press 66 connects.So, sedimentation basin bottom precipitation pumps pressure containing solid sodium sulfate and sodium nitrate solution through Pulp pump 67 Filter 66, after separation of solid and liquid, solid sodium sulfate and sodium nitrate dispatch from the factory through the transport of special transport vehicle 7.
In the utility model:
The technological principle of dry desulfurization is in boiler or kiln:Lime stone powder material (mainly CaCO3Powder) and cigarette SO in gas2And part SO3, the sour gas such as HCl, HF, in CaCO3The surface of particle reacts, and reaction is as follows:
CaCO3+2HCl→CaCl2+2H2O
CaCO3+2HF→CaF2+2H2O
CaCO3+SO2→CaSO3+H2O
CaCO3+SO3→CaSO4+H2O
CaCO3+SO2+1/2O2→CaSO4+H2O
CaCO3Powder is sufficiently mixed in boiler or kiln upper furnace with high-temperature flue gas, so that HCl, HF, SO2、SO3Deng Sour gas can fully be absorbed, and realize desulfurization;
The technological principle of Dry denitration is in boiler or kiln:In 850~1000 DEG C of this narrow temperature ranges of burner hearth It is interior, under without catalyst action, NH3Or the amino reductive such as urea optionally reduces the NO in flue gasX, NH3Or urea is also Former NOXKey reaction be:
NH3For reducing agent:4NH3+4NO+O2→4N2+6H2O
Urea method is reducing agent:NO+CO(NH2)2+1/2O2→2N2+CO2+H2O
When temperature is higher than 1100 DEG C, NH3It can then be oxidized to:4NH3+5O2→4NO+6H2O
The raw materials used CaCO of the utility model3Storage can be mixed in desulphurization denitration powder material warehouse with urea powder, then Burner hearth is sprayed into simultaneously carries out desulphurization denitration;
The technological principle of wet desulphurization is in absorption tower:Using sodium carbonate or sodium hydroxide solution as in the first Alkali absorption flue gas SO2, sodium sulfite and solution of sodium bisulfite are generated, soda is added into sulfur removing pregnant solution, is allowed to be converted into alkaline sulfurous acid Sodium absorbing liquid sends absorption tower recycling back to, due to using soda lye as absorbing liquid, in the absence of fouling and slurry blockage problem, And sodium salt absorption rate is faster than calcium salt speed, required liquid-gas ratio is much lower, can save power consumption.Therefore, this practicality New to use sodium hydroxide alkaline process sulfur removal technology, desulfurizing agent is outsourcing alkali piece, and NaOH solution absorbs the SO in flue gas2, generation HSO3 2-、SO3 2-With SO4 2-, reaction equation is as follows:
First, sweetening process
Startup stage NaOH solution absorbs SO2And regenerated liquid pH value it is higher when (be higher than 8 when), doctor solution absorbs SO2Master React and be:
Main reaction during doctor solution pH value relatively low (5~8) is:
2nd, oxidizing process (side reaction)
The technological principle of wet denitration is in absorption tower:Using the strong oxidizing property of ozone, by insoluble lower valency nitrogen oxygen Compound is oxidized to solvable high-valence state nitrogen oxides, then in scrubbing tower by nox adsorption, reaches the purpose of removing;
Utility model people is studied NO oxidation mechanism during ozone simultaneous SO_2 and NO removal, to ozone in cigarette The dispensing in road, gas distribution mode, gas phase hybrid mode, temperature control influence, dust influence etc. have done comprehensive simulated experiment, summarize Cigarette constructs O3The detailed chemical reaction mechanism between NOX, the mechanism are more complicated., can be according to low in actual tests Ozone and NO key reaction are studied under the conditions of temperature, under cryogenic conditions, O3Key reaction between NO is as follows:
NO+O3→NO2+O2
NO2+O3→NO3+O2
NO3+NO2→N2O5
2NO+O2=2NO2
4NO2+O2+2H2O=4HNO3
2NO+O2=2NO2
4NO2+O2+2H2O=4HNO3
2HNO3+ NaOH=Na (NO3)2+2H2O
Compared to other chemical substances such as CO, SOx in gas phase etc., NOx can be soon by ozone oxidation, and this is allowed for NOx ozone oxidation has very high selectivity.Because the NOx in gas phase is converted to be dissolved in the ionic compound of the aqueous solution, It is more complete that this allows for oxidation reaction, so as to irreversibly be stripped of NOx, without producing secondary pollution.Through peroxidization, The ozone of addition is consumed by reaction, and excessive ozone can decompose in spray column.In addition to NO, some heavy metals, such as Mercury and other heavy metal contaminants are also aoxidized by ozone simultaneously.The dust or solid particulate matter of flue gas middle and high concentration do not interfere with To NOx removal efficiency.
Oxidizing and denitrating ozone can be applied to:Using coal, coke, lignite as fuel public work boiler or kiln;With combustion gas, Coal, the Industrial Boiler or kiln that heavy oil is fuel;Lead, iron ore, zinc/copper, glass, cement processing, the various stoves of production;For Handle the combustion furnace of biological waste, tire and other industrial wastes;Come from the acid gas stream of pickling and chemical process;Catalysis is split Change treating tail gas;The industry such as various municipal administrations and industrial refuse incinerator smoke treating.
The utility model completes the purpose of further desulphurization denitration simultaneously in a unified tower, so as to reach ultralow row Put standard.Application of the present utility model, original traditional SCR technology will be replaced, greatly save investment and operating cost, be boiler Or kiln kiln realizes that minimum discharge target lays the foundation.
It should be understood that example as described herein and embodiment are not limited to the utility model, originally only for explanation Art personnel can make various modifications or change according to it, all within the spirit and principles of the utility model, be made Any modification, equivalent substitution and improvements etc., should be included within the scope of protection of the utility model.

Claims (10)

  1. A kind of 1. dry-wet integratedization desulfuring and denitrifying apparatus, it is characterised in that including:
    Boiler or kiln (1), the implementation place as dry desulfurization denitration process;
    Absorption tower (2), the implementation place as wet desulphurization denitration process;
    Dry method feeding machanism, connect with the boiler or kiln (1), taken off for adding dry method into the boiler or kiln (1) Scavenger used in sulphur denitration;
    Wet method feeding machanism, connected with the absorption tower (2), for adding wet desulphurization denitration institute into the absorption tower (2) Scavenger;
    Communicating pipe (31) is connected between the boiler or kiln (1) and the absorption tower (2).
  2. 2. dry-wet integratedization desulfuring and denitrifying apparatus as claimed in claim 1, it is characterised in that:Installed on the communicating pipe (31) There is deduster (32).
  3. 3. dry-wet integratedization desulfuring and denitrifying apparatus as claimed in claim 1 or 2, it is characterised in that:On the communicating pipe (31) Air-introduced machine (33) is installed.
  4. 4. dry-wet integratedization desulfuring and denitrifying apparatus as claimed in claim 1 or 2, it is characterised in that:The dry method feeding machanism Including desulphurization denitration powder material warehouse (41), air blower (42) and material mixing module (43), the desulphurization denitration powder material warehouse (41) lime stone powder material feed pipe (411) and urea powder material feed pipe (412), the air blower (42) are connected with Wind is connected between the material mixing module (43) and send pipe (44), the bottom of the desulphurization denitration powder material warehouse (41) and institute State wind and send and the discharge nozzle (45) of more than one is connected between pipe (44), metering feeding device is installed on the discharge nozzle (45) (46), it is connected with conveying pipeline (47) between the material mixing module (43) and the burner hearth of the boiler or kiln (1).
  5. 5. dry-wet integratedization desulfuring and denitrifying apparatus as claimed in claim 1 or 2, it is characterised in that:The wet method feeding machanism Including liquid caustic soda storage tank (51), tank diameter (52) and desulphurization denitration pond (53), the liquid caustic soda storage tank (51) and the tank diameter (52) between, pipeline communication, the desulphurization denitration pond are passed through between the tank diameter (52) and the desulphurization denitration pond (53) (53) connected between the absorption tower (2) by desulfurization pump (54).
  6. 6. dry-wet integratedization desulfuring and denitrifying apparatus as claimed in claim 1 or 2, it is characterised in that:The wet method feeding machanism Including the ozone interface (55) being connected on communicating pipe (31).
  7. 7. dry-wet integratedization desulfuring and denitrifying apparatus as claimed in claim 1 or 2, it is characterised in that:Also include post processing mechanism, For carrying out emission treatment to waste material caused by the flue gas after processing and process.
  8. 8. dry-wet integratedization desulfuring and denitrifying apparatus as claimed in claim 7, it is characterised in that:The post processing mechanism includes cigarette Chimney (61) and more than one sedimentation basin (62), pass through exhaust pass between the chimney (61) and the absorption tower (2) (63) connect, the sedimentation basin (62) is connected with the absorption tower (2) by grey ditch (64).
  9. 9. dry-wet integratedization desulfuring and denitrifying apparatus as claimed in claim 8, it is characterised in that:The sedimentation basin (62) is with aerobic Wind transmission machine (65), for being passed through air into the sedimentation basin (62).
  10. 10. dry-wet integratedization desulfuring and denitrifying apparatus as claimed in claim 8, it is characterised in that:The post processing mechanism is also wrapped Filter press (66) is included, the sedimentation basin (62) is connected by Pulp pump (67) with the filter press (66).
CN201720601533.4U 2017-05-26 2017-05-26 A kind of dry-wet integratedization desulfuring and denitrifying apparatus Active CN206762618U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109260919A (en) * 2018-09-10 2019-01-25 杭州电子科技大学 The integration desulfurization denitration device and its desulfurization denitration method of ozone combination urea
CN110585868A (en) * 2019-10-12 2019-12-20 沈洪彬 Preparation and application of dry-wet dual-purpose flue gas desulfurization and denitrification agent

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109260919A (en) * 2018-09-10 2019-01-25 杭州电子科技大学 The integration desulfurization denitration device and its desulfurization denitration method of ozone combination urea
CN110585868A (en) * 2019-10-12 2019-12-20 沈洪彬 Preparation and application of dry-wet dual-purpose flue gas desulfurization and denitrification agent

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