CN114849471A - HTr-3SO combined denitration system applied to treatment of glass fiber kiln waste gas - Google Patents
HTr-3SO combined denitration system applied to treatment of glass fiber kiln waste gas Download PDFInfo
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- B01D53/34—Chemical or biological purification of waste gases
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Abstract
The invention discloses an HTr-3SO combined denitration system applied to waste gas treatment of a glass fiber kiln, which comprises a desulfurization tower, a flue, a supergravity oxidation system, a metering distribution injection system, a composite bio-based denitration agent storage and transportation system and a compressed air system, wherein the desulfurization tower is connected with the flue; the hypergravity oxidation system comprises a 3SO generator, an oxidant conveying system, a catalyst conveying system, a gas distribution conveying system and a softened water release conveying system; the metering and distributing injection system comprises a glass fiber denitration agent on-line metering, adjusting and special atomizing spray gun; the invention is independent of the kiln system, the high temperature section adopts an atomizing spray gun to spray into the kiln smoke, and the low temperature section adopts strong oxidant gas to oxidize, thus having no influence on the operation of the original kiln system; the technology has the advantages of small occupied area, modular application, high automation degree, high reaction speed and full reaction; the range of applicable working conditions and temperatures is wide, the denitration effect is good, and the efficiency is stable; the fuel is suitable for different fuels and is not interfered by smoke dust particles; the operation of the prior art is not influenced, and the like.
Description
Technical Field
The invention belongs to the technical field of denitration, and particularly relates to an HTr-3SO combined denitration system applied to treatment of waste gas of a glass fiber kiln.
Background
At present, the atmospheric pollution nitrogen oxide in the glass fiber industry for treating the flue gas at home and abroad has no requirement of ultra-clean emission treatment, and the flue gas emission index of the original nitrogen oxide is higher and reaches 300mg/Nm 3 The kiln can meet the emission requirement through the self combustion process and low-nitrogen combustion adjustment. However, with the gradual increase of the requirements of the national environmental protection policy, the requirement of 100mg/Nm on the nitrogen oxide index is put forward in the request draft of the emission standard of the industrial pollutants of the flue gas nitrogen oxide glass fiber and products 3 The following. The traditional conventional denitration process flow is a selective non-catalytic reduction (SNCR) method, a Selective Catalytic Reduction (SCR) method and an SNCR + SCR combined denitration or denitration and dust removal integrated technology, and the processes are applied earlier in other industries and mature in technology to obtain more successful performances.
The waste gas treatment of the glass fiber kiln is basically similar to the technical treatment of other industries such as a power plant and the like, but the waste gas of the glass fiber kiln also has the particularity, the smoke gas volume of the glass fiber kiln is small, the smoke gas emission temperature is higher, the unit concentration of nitric oxide is higher, the pollutant components are complex, and the treatment comprises SO 2 、NOx、CO 2 HF, HCL, boride and the like, and early glass fiber kilns are simply transplanted to mature technologies of other industries by some customers, the technologies obviously show many problems in application in the industry, SNCR selective non-catalytic reduction denitration has insufficient reaction time and low denitration efficiency, a temperature window sprayed by the kilns is high, sprayed ammonia is oxidized into nitric oxide, the emission value of the original nitric oxide is increased, the treatment difficulty is increased, ammonia at the tail part of a large amount of sprayed excessive ammonia escapes highly, and a large amount of corrosion is caused to downstream equipment and a flue.
The denitration efficiency of the SCR selective catalytic reduction method applied to ultralow emission meets, but the denitration efficiency is reduced due to the reduction and poisoning of the activity of the catalyst caused by the high viscosity of dust discharged by flue gas of a glass fiber kiln, and the service life of the catalyst is greatly reduced.
The denitration dust removal ceramic filter tube integrated technology is characterized in that nitrogen oxides in flue gas are reduced into nitrogen and water under the action of a catalyst through a porous element, the flue gas after clean dust removal is discharged from the inner wall of a ceramic filter tube fiber tube, the denitration dust removal of the ceramic filter tube has high removal efficiency, and ceramic fiber materials are high temperature resistant, are not easy to burn and are resistant to acid and alkali corrosion, but a large amount of fluoride and boride exist in glass fiber flue gas and easily block pores of the ceramic filter tube, the resistance of the filter tube is increased to cause the failure of the ceramic filter tube, the service life is shortened, and the like.
The existing selective non-catalytic reduction denitration method of SNCR has the defects of low denitration efficiency, insufficient reaction time and high temperature window sprayed by a kiln, so that the sprayed ammonia is oxidized into nitrogen oxide, the emission value of the original nitrogen oxide is increased, the treatment difficulty is increased, the ammonia escape from the tail part of a large amount of sprayed excessive ammonia is high, and a large amount of corrosion is caused to downstream equipment and a flue. The SCR selective catalytic reduction denitration technology is an early technology applied in other industries, but the method is applied to a glass fiber kiln, and the activity of the catalyst is reduced and poisoned due to the fact that dust is high in viscosity, so that the denitration efficiency is reduced, the service life of the catalyst is greatly reduced, and the operation cycle of a system is greatly influenced. Although the denitration dust removal ceramic filter tube integration technology is high-temperature resistant, acid and alkali resistant and corrosion resistant, fluoride and boride existing in the glass fiber production process easily block filter gaps of the ceramic filter tube, so that the pressure loss of a system is increased, the service life of the ceramic filter tube is shortened, and the start-stop cycle of a kiln is influenced.
Disclosure of Invention
The invention aims to provide an HTr-3SO combined denitration system applied to treatment of glass fiber kiln waste gas, which aims to solve the problems in the background art and provides the following technical scheme:
an HTr-3SO combined denitration system applied to treatment of glass fiber kiln waste gas comprises a desulfurization tower, a flue, a supergravity oxidation system, a metering distribution injection system, a composite bio-based denitration agent storage and transportation system, a compressed air system and a diluted softened water transportation system; one end of the flue is communicated with the desulfurizing tower; the supergravity oxidation system comprises a 3SO generator, an oxidant conveying system, a catalyst conveying system and a gas distribution conveying system, wherein the oxidant conveying system and the catalyst conveying system are communicated with a gas inlet of the 3SO generator through a tee joint, one end of the gas distribution conveying system is communicated with a gas outlet of the 3SO generator, and the gas distribution conveying system is assembled in the flue; the metering distribution injection system comprises a glass fiber tank furnace and two spray guns, wherein an air outlet of the glass fiber tank furnace is communicated with the other end of the flue, and the two spray guns are respectively arranged on the front and rear furnace walls of a refractory brick high-temperature flue gas section right below a vertical steel chimney of the glass fiber tank furnace; the composite bio-based denitration agent storage and transportation system and the compressed air system are communicated into the spray gun at the same time; the composite bio-based denitration agent storage and transportation system stores a composite bio-based denitration agent, and the composite bio-based denitration agent comprises a bio-based denitration agent and an auxiliary agent; and the diluted softened water conveying system is communicated with the composite bio-based denitration agent storage and transportation system.
The working principle is as follows: the flue gas sprayed by the desulfurization tower enters a flue, an oxidant conveying system and a catalyst conveying system respectively convey an oxidant and a catalyst into a 3SO generator, the 3SO generator generates strong oxidant gas by two liquid reagents through centrifugal force, the strong oxidant gas generated by supergravity is conveyed into the flue through a gas distribution conveying system, the flue gas is contacted with the strong oxidant gas to oxidize insoluble low-valence nitrogen oxides into soluble high-valence oxides, the nitrogen oxides are absorbed and converted into water-soluble substances, and the oxidized flue gas enters a glass fiber tank furnace through the flue; the composite bio-based denitration agent storage and transportation system conveys the high-efficiency denitration agent mixed solution to the spray gun, the compressed air system conveys compressed air to the spray gun, the denitration agent mixed solution is compressed and cooled by the compressed air to form a cooled liquid denitration agent, the liquid denitration agent is atomized and sprayed into the glass fiber tank furnace by the spray gun, the denitration reducing agent is cracked into single-chain or short-chain C, H, O compound-effective free radicals under the catalytic action of the auxiliary agent, and the effective free radicalsThe agglomerates re-neutralize NO in the flue gas x Reduction reaction is carried out to generate N 2 、CO 2 And H 2 O。
The invention is independent of the kiln system, the high-temperature section adopts an atomizing spray gun to spray into the kiln smoke, and the low-temperature section adopts strong oxidant gas for oxidation, thus having no influence on the operation of the original kiln system and the startup and shutdown period of the system; the technology has the advantages of small occupied area, modular application, high automation degree, high reaction speed and full reaction; the range of applicable working conditions and temperatures is wide, the denitration effect is good, and the efficiency is stable; the fuel is suitable for different fuels and is not interfered by smoke dust particles; the operation of the prior art is not influenced, and the like.
Preferably, the oxidant delivery system comprises an oxidant storage tank, an oxidant delivery pump, and pipeline valves and meters; the outlet of the oxidant storage tank is communicated with the feed inlet of the 3SO generator through a pipeline, a valve and an instrument are arranged on the pipeline, and the oxidant delivery pump is assembled on the pipeline and used for delivering the oxidant in the oxidant storage tank to the 3SO generator.
Preferably, the catalyst delivery system comprises a catalyst storage tank, a catalyst delivery pump, and pipeline valves and meters; the outlet of the catalyst storage tank is communicated with the feed inlet of the 3SO generator through a pipeline, a valve and an instrument are arranged on the pipeline, and the catalyst delivery pump is assembled on the pipeline and used for delivering the catalyst in the catalyst storage tank to the 3SO generator.
Preferably, the gas distribution conveying system comprises a main pipe and a plurality of branch pipes, one end of the main pipe is communicated with a gas outlet of the 3SO generator, the plurality of branch pipes are uniformly distributed at a distance of 100mm, spray holes are formed in each branch pipe at a distance of 50-120mm, and the diameter of each spray hole is 4-6mm, SO that the coverage rate of the chlorine dioxide gas spray nozzle is ensured.
Has the advantages that: the gas distribution conveying system can simulate the optimal coverage rate of a chlorine dioxide gas nozzle by using a computer CFD (computational fluid dynamics) numerical value to ensure that the gas-gas contact specific surface area enhances the reaction, and residual nitrogen oxides not removed by the flue gas are oxidized into high valence state by a strong oxidant and are absorbed and removed by a tail alkali liquor washing system, SO that the nitrogen oxides are high in content of HTr-3SOThe effect-combined denitration system controls the nitrogen oxide outlet of the glass fiber kiln to be 10mg/Nm 3 The following.
Preferably, the supergravity oxidation system further comprises a tail alkali washing system, the tail alkali washing system is communicated with the flue through a pipeline, and residual nitrogen oxides not removed by the flue gas are oxidized into high valence state by a strong oxidant and are absorbed and removed by the tail alkali washing system.
Preferably, the spray gun is movably connected with the wall of the glass fiber tank furnace; the spray gun is provided with a liquid pipe, an atomizing air pipe and a cooling air pipe from inside to outside.
Has the advantages that: the spray gun is movably connected with the kiln wall of the glass fiber tank furnace, and the length of the spray gun inserted into the hearth can be adjusted to ensure the optimal atomization effect.
Preferably, the spray gun has a nozzle with a lateral opening, the spray is fan-shaped, and the average particle size of the spray is about 100 microns.
Has the advantages that: the spray nozzle of the spray gun is provided with a hole in the side direction, the spray is shaped like a fan, and the average particle size of the spray is about 100 microns, so that the sprayed liquid denitrifier can be quickly evaporated, and the possible impact on the peripheral furnace wall can be avoided to the maximum extent.
Preferably, the lance employs a measure of cooling air to protect the internal media; each lance is analyzed for the optimum flow path based on numerical simulations, and each lance is of the appropriate size and characteristics to ensure the flow and pressure required to achieve the necessary NOx emissions.
Has the advantages that: the spray gun adopts the measure of cooling air to protect the internal medium, thereby avoiding the evaporation and dry burning of the liquid medium in the spray gun and ensuring the service life of the spray gun.
Preferably, the composite bio-based denitration agent storage and transportation system comprises a composite bio-based storage tank, a discharging pump, a jacking stirrer, a denitration agent delivery pump, a valve pipeline and an instrument; the discharging pump is communicated with the composite bio-based storage tank through a pipeline, the jacking stirrer is arranged in the composite bio-based storage tank, and a discharging port of the composite bio-based storage tank is communicated with the spray gun through a pipeline.
Preferably, the diluted softened water conveying system comprises a diluted softened water storage tank, a diluted softened water conveying pump, a valve pipeline and a meter; the diluted softened water storage tank is connected with a pipeline of the composite bio-based denitration agent storage and transportation system through a tee joint and communicated to the spray gun, and the diluted softened water delivery pump is assembled on the pipeline.
Compared with the prior art, the invention has the advantages that:
1. the flue gas sprayed by the desulfurization tower enters a flue, an oxidant conveying system and a catalyst conveying system respectively convey an oxidant and a catalyst into a 3SO generator, the 3SO generator generates strong oxidant gas by two liquid reagents through centrifugal force, the strong oxidant gas generated by supergravity is conveyed into the flue through a gas distribution conveying system, the flue gas is contacted with the strong oxidant gas to oxidize insoluble low-valence nitrogen oxides into soluble high-valence oxides, the nitrogen oxides are absorbed and converted into water-soluble substances, and the oxidized flue gas enters a glass fiber tank furnace through the flue; the composite bio-based denitration agent storage and transportation system conveys the high-efficiency denitration agent mixed solution to the spray gun, the compressed air system conveys compressed air to the spray gun, the denitration agent mixed solution is compressed and cooled by the compressed air to form a cooled liquid denitration agent, the liquid denitration agent is atomized and sprayed into the glass fiber tank furnace by the spray gun, the denitration reducing agent is cracked into single-chain or short-chain C, H, O compound-effective free radicals under the catalytic action of the auxiliary agent, and the effective free radicals are further mixed with NO in the flue gas x Reduction reaction is carried out to generate N 2 、CO 2 And H 2 O; the invention is independent of the kiln system, the high-temperature section adopts an atomizing spray gun to spray into the kiln smoke, and the low-temperature section adopts strong oxidant gas for oxidation, thus having no influence on the operation of the original kiln system and the startup and shutdown period of the system; the technology has the advantages of small occupied area, modular application, high automation degree, high reaction speed, full reaction, reaction time of only 0.1-0.2 second, and small distance between flue temperature intervals; the method has the advantages of wide range of applicable working condition temperatures, good denitration effect and stable efficiency, is suitable for working condition places with small air quantity and high nitrogen oxide concentration, and meets the latest requirements of environmental protection on ultralow emission; is suitable for different fuels and is free from smokeInterference of gas dust particles; the device has the advantages of small volume, high integration level of the device, simple operation, reliable operation, convenient operation and maintenance and strong space adaptability. The matched conveying equipment is mature.
2. The gas distribution conveying system can simulate the optimal coverage rate of a chlorine dioxide gas nozzle by using a computer CFD (computational fluid dynamics) numerical value to ensure that the gas-gas contact specific surface area enhances the reaction, the residual nitrogen oxide which is not removed in the flue gas is oxidized into a high-valence state by a strong oxidant and is absorbed and removed by a tail alkali liquor washing system, and thus the nitrogen oxide outlet of the glass fiber kiln is controlled at 10mg/Nm by an HTr-3SO high-efficiency combined denitration system 3 The following.
3. The spray gun is movably connected with the kiln wall of the glass fiber tank furnace, and the length of the spray gun inserted into the hearth can be adjusted to ensure the optimal atomization effect; the nozzle of the spray gun is provided with a hole in the lateral direction, the spray is shaped like a fan, and the average spray particle size is about 100 microns, so that the sprayed liquid denitration agent can be quickly evaporated, and the possible impact on the peripheral furnace wall can be avoided to the maximum extent; the spray gun adopts the measure of cooling air to protect the internal medium, thereby avoiding the evaporation and dry burning of the liquid medium in the spray gun and ensuring the service life of the spray gun.
Drawings
FIG. 1 is a schematic structural diagram of an HTr-3SO combined denitration system applied to treatment of waste gas of a glass fiber kiln according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a supergravity oxidation system and a metering and dispensing injection system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the configuration of an oxidant delivery system in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of the configuration of a catalyst delivery system according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a metered dispensing spray system according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a composite bio-based denitrification agent storage and delivery system according to an embodiment of the invention;
FIG. 7 is a schematic diagram of a dilute demineralized water delivery system according to an embodiment of the present invention.
The reference numbers indicate:
1. a desulfurizing tower; 2. a flue; 3. a supergravity oxidation system; 31. a 3SO generator; 32. an oxidant delivery system; 321. an oxidant storage tank; 332. an oxidant delivery pump; 33. a catalyst delivery system; 331. a catalyst storage tank; 332. a catalyst transfer pump; 34. a gas distribution conveying system; 35. a tail alkali liquor washing system; 4. a metered dispensing spray system; 41. a glass fiber tank furnace; 42. a spray gun; 5. a composite bio-based denitration agent storage and transportation system; 51. a composite bio-based storage tank; 52. a discharge pump; 53. a jack-in agitator; 54. a denitrifier delivery pump; 6. a compressed air system; 7. a dilute demineralized water delivery system; 71. a storage tank for diluted softened water; 72. a delivery pump for dilution softened water.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings and the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present embodiment provides an HTr-3SO combined denitration system applied to glass fiber kiln waste gas treatment, which includes a desulfurization tower 1, a flue 2, a supergravity oxidation system 3, a metering and distributing injection system 4, a composite bio-based denitration agent storage and transportation system 5, a compressed air system 6, and a diluted softened water transportation system 7.
As shown in fig. 1, one end of the flue 2 communicates with the outlet of the desulfurization tower 1.
As shown in fig. 1-4, the hypergravity oxidation system 3 comprises a 3SO generator 31, an oxidant delivery system 32, a catalyst delivery system 33, a gas distribution delivery system 34 and a tail lye washing system 35; the oxidant delivery system 32 comprises an oxidant storage tank 321, an oxidant delivery pump 322, and pipeline valves and meters; the catalyst delivery system 33 comprises a catalyst storage tank 331, a catalyst delivery pump 332, and pipeline valves and meters; the catalyst delivery system 33 comprises a catalyst storage tank 331, a catalyst delivery pump 332, and pipeline valves and meters; an outlet of the oxidant storage tank 321 is communicated with a feed inlet of the 3SO generator 31 through a pipeline, a valve and an instrument are arranged on the pipeline, and the oxidant delivery pump 322 is assembled on the pipeline and used for delivering the oxidant in the oxidant storage tank 321 into the 3SO generator 31; an outlet of the catalyst storage tank 331 is communicated with a feed inlet of the 3SO generator 31 through a pipeline, a valve and an instrument are arranged on the pipeline, and a catalyst delivery pump 332 is assembled on the pipeline and used for delivering the catalyst in the catalyst storage tank 331 to the 3SO generator 31; the gas distribution conveying system 34 comprises a main pipe and a plurality of branch pipes, wherein one end of the main pipe is communicated with a gas outlet of the 3SO generator 31, the plurality of branch pipes are uniformly distributed at a spacing of 100mm, spray holes are formed in each branch pipe at a spacing of 50-120mm, and the diameter of each spray hole is 4-6mm, SO that the coverage rate of a chlorine dioxide gas spray nozzle is ensured; the tail alkali liquor washing system 35 is communicated with the flue 2 through a pipeline, and residual nitrogen oxides which are not removed by the flue gas are oxidized into high valence states through a strong oxidant and are absorbed and removed by the tail alkali liquor washing system 35.
The gas distribution conveying system 34 can simulate the optimal coverage rate of the chlorine dioxide gas nozzle by using a computer CFD (computational fluid dynamics) numerical value to ensure that the contact specific surface area of gas and gas is strengthened to react, residual nitrogen oxide which is not removed in flue gas is oxidized into a high-valence state by a strong oxidant and is absorbed and removed by a tail alkali liquor washing system, and thus the nitrogen oxide outlet of the glass fiber kiln is controlled at 10mg/Nm by an HTr-3SO high-efficiency combined denitration system 3 The following.
As shown in fig. 1 and 5, the metering and distributing injection system 4 comprises a glass fiber tank furnace 41 and two spray guns 42, wherein an air outlet of the glass fiber tank furnace 41 is communicated with the other end of the flue 2, and the two spray guns 42 are respectively arranged on the front and rear furnace walls of a refractory brick high-temperature flue gas section right below a vertical steel chimney of the glass fiber tank furnace 41; the spray gun 42 is movably connected with the kiln wall of the glass fiber tank furnace 41; the spray gun 42 is respectively provided with a liquid pipe, an atomizing air pipe and a cooling air pipe from inside to outside; the nozzle of the lance 42 is open laterally, the spray is fan-shaped, and the average spray particle size is about 100 microns; the lance 42 protects the internal medium by means of cooling air; each lance 42 is analyzed for the optimum flow path based on numerical simulations, and each lance 42 is of the appropriate size and characteristics to ensure the flow and pressure required to achieve the necessary NOx emissions.
The spray gun 42 is movably connected with the kiln wall of the glass fiber tank furnace 41, and the length of the spray gun inserted into the hearth can be adjusted to ensure the optimal atomization effect; the nozzle of the spray gun 42 is provided with a lateral hole, the spray is shaped like a fan, and the average spray particle size is about 100 microns, so that the sprayed liquid denitration agent can be quickly evaporated, and the possible impact on the peripheral furnace wall can be avoided to the maximum extent; the spray gun 42 adopts a cooling air measure to protect the internal medium, so that the evaporation and dry burning of the liquid medium in the spray gun 42 are avoided, and the service life of the spray gun 42 is ensured.
As shown in fig. 1 and fig. 6, the composite bio-based denitration agent storage and transportation system 5 and the compressed air system 6 are simultaneously communicated into the spray gun 42, and the composite bio-based denitration agent storage and transportation system 5 comprises a composite bio-based storage tank 51, a discharge pump 52, a top-feed stirrer 53, a denitration agent delivery pump 54, a valve pipeline and a meter; the unloading pump 52 is communicated with the composite bio-based storage tank 51 through a pipeline, the jacking stirrer 53 is arranged in the composite bio-based storage tank 51, and the discharge port of the composite bio-based storage tank 51 is communicated with the spray gun 42 through a pipeline.
The composite bio-based denitration agent in the tank car is conveyed into a composite bio-based storage tank 51 through a discharge pump 52, and the capacity is considered according to the condition that the one-time discharge time is not more than 1 hour. The composite bio-based material storage tank 51 is sealed and stored under normal pressure, is vertical and is made of corrosion-resistant materials. The denitration agent in the composite bio-based storage tank 51 is conveyed to the static mixer through the denitration agent conveying pump 54, the conveying amount is automatically tracked and adjusted according to the numerical value of nitrogen oxide at the outlet of the chimney through the metering conveying system, and a back pressure safety system is arranged on a pipeline of the metering conveying system to prevent the system from stopping due to the overpressure at the rear end of the static mixer.
As shown in fig. 1 and 7, the dilute softened water delivery system 7 includes a dilute softened water storage tank 71, a dilute softened water delivery pump 72, and valve pipes and meters; the diluted softened water storage tank 71 is connected with the pipeline of the composite bio-based denitration agent storage and transportation system 5 through a tee joint and communicated to the spray gun 42, and the diluted softened water delivery pump 72 is assembled on the pipeline. This engineering sets up 1 dilution demineralized water storage tank 71, and the effect of dilution water is with compound bio-based denitration agent concentration dilution to below 50%, and carry to the static mixer through the dilution water in dilution demineralized water storage tank 71, and the volume of carrying is carried out dual correction automatic tracking according to the numerical value size of chimney exit nitrogen oxide and the ratio of denitration agent delivery volume and is adjusted the delivery volume, and the measurement conveying system pipeline is provided with the backpressure safety coefficient, causes the system parking for preventing static mixer rear end pressure superpressure.
The invention also comprises a dilution metering system, wherein the dilution metering system comprises a denitrifier flowmeter, a diluting water flowmeter, a static mixer, a relevant pipeline valve, a relevant meter and the like. The device can accurately measure and control the composite bio-based denitration dosage and the diluted softened water quantity conveyed to the injection metering system, meanwhile, the special design of the device can ensure that the diluted denitration agent and the flue gas are fully and uniformly mixed, the metering and distributing injection system is provided with an online real-time flowmeter, and the supply amount of the denitration agent and the metering pump for diluting the softened water can be fed back according to different working conditions of the flue gas. The jetting system will have good thermal expansion, thermal deformation resistance and vibration resistance.
The working principle of the embodiment is as follows: the embodiment provides an HTr-3SO combined denitration system applied to treatment of waste gas of a glass fiber kiln, when in use, flue gas sprayed by a desulfurization tower 1 enters a flue 2, an oxidant conveying system 32 and a catalyst conveying system 33 respectively convey an oxidant and a catalyst into a 3SO generator 31, the 3SO generator 31 generates strong oxidant gas by two liquid reagents through centrifugal force, the strong oxidant gas generated by supergravity is conveyed into the flue 2 through a gas distribution conveying system 34, the flue gas is contacted with the strong oxidant gas to oxidize insoluble low-valence-state nitrogen oxides into soluble high-valence oxides, the nitrogen oxides are absorbed and converted into water-soluble substances, and the oxidized flue gas enters a glass fiber tank kiln 41 through the flue 2; the composite bio-based denitration agent storage and transportation system 5 conveys the high-efficiency denitration agent mixed liquid to the spray gun 42, the compressed air system 6 conveys compressed air to the spray gun 42, the denitration agent mixed liquid is compressed and cooled by the compressed air to form a cooled liquid denitration agent, the liquid denitration agent is atomized and sprayed into the glass fiber tank furnace 41 through the spray gun 42, and denitration is carried outThe reducing agent is cracked into single-chain or short-chain C, H, O compound-effective free radical under the catalytic action of the auxiliary agent, and the effective free radical is further mixed with NO in the smoke x Reduction reaction is carried out to generate N 2 、CO 2 And H 2 O。
The invention is independent of the kiln system, the high temperature section adopts the atomizing spray gun 42 to spray into the kiln smoke, the low temperature section adopts strong oxidant gas to oxidize, has no influence on the operation of the original kiln system, and does not influence the start-stop period of the system; the technology has the advantages of small occupied area, modular application, high automation degree, high reaction speed and full reaction; the range of applicable working conditions and temperatures is wide, the denitration effect is good, and the efficiency is stable; the fuel is suitable for different fuels and is not interfered by smoke dust particles; the operation of the prior art is not influenced, and the like.
Example two
The HTr-3SO combined denitration system for treating the glass fiber kiln waste gas mainly comprises a composite bio-based denitration reducing agent and an efficient oxidation system, wherein the high-temperature section comprises the following components: calcium acetate, calcium propionate, ethyl acrylate, calcium oxalate, ethyl acrylate and company proprietary auxiliaries; the denitration agent is sprayed into a high-temperature section of a chimney at the outlet of the glass fiber tank furnace 41 according to a certain proportion through a customized atomization spray gun 2, the denitration reducing agent is cracked into single-chain or short-chain C, H, O compound-effective free radicals under the catalytic action of an auxiliary agent, and the effective free radicals are subjected to reduction reaction with NOx in the flue gas to generate N2 and CO 2 And H 2 O。
The application temperature range of the composite bio-based denitration is wide, the reaction temperature is 650-1100 ℃, the optimal reaction temperature is 800 ℃, the reaction rate is fastest, and the consumption is lowest.
The reaction process is as follows:
firstly, carrying out high-temperature pyrolysis on a denitrifying agent to generate an effective group:
CaTN---Ca+C 2 H 2 +C 2 H 4 +C 3 H 6 +HCCO+HCNO+CH 4 COH+CH 4 COO+H 2 O
secondly, the effective groups respectively react with NOx:
C 2 H 2 +NO---N 2 +H 2 O+CO 2 ；
C 3 H 8 +NO---N 2 +H 2 O+CO 2 ；
CH 4 COH+NO---N 2 +H 2 O+CO 2 ；
HCNO+NO---N 2 +H 2 O+CO 2 ；
CH 4 COO+NO---N 2 +H 2 O+CO 2 ；
the comprehensive reaction formula is as follows:
C+2NO＝N 2 +CO 2 ；
2H 2 +2NO＝N 2 +2H 2 O；
wherein, the low-temperature oxidation section adopts a supergravity rotating mechanism to generate a strong oxidant gas product by two liquid medicaments through centrifugal force, and researches and develops the catalytic acceleration reaction for obtaining purer and more sufficient oxidant. When 0.01-0.1% (w) t of urea, 1-hydroxyethyl-1, 1-diphosphonic acid, 1-aminoethyl-1, 1-diphosphonic acid and other organic phosphates, phthalide aniline, sodium stannate, sodium silicate and other catalysts are added into the reaction solution, the generation speed of chlorine dioxide can be increased by 15% -50%, the reaction temperature is 60 ℃, and the principle of oxidation and denitration is as follows:
2ClO 2 +5NO+H 2 O→HCl+5NO 2 ；
[ClO 2 ]:[NO]the mass ratio of (2.5-3: 5) and the flue gas condition: the temperature is less than 180 ℃, and the retention time is 2-3 seconds.
A synergistic desulfurization absorption system: principle of reduction and absorption
4NO 2 +SO 2 +3Ca(OH) 2 →Ca(NO 3 ) 2 +Ca(NO 2 ) 2 +3H 2 O+CaSO 3
And the oxidized nitrogen oxide enters a desulfurization system to complete desulfurization and denitrification absorption together, and the absorption reaction is mutually promoted under the coexistence of sulfur dioxide and the nitrogen oxide.
The low-temperature oxidation section is arranged on a horizontal straight section flue 2 in front of the desulfurizing tower 1, the smoke temperature is lower than 180 ℃, strong oxidant gas generated by supergravity is conveyed into the flue 2 through a DN80 pipeline, the flue gas is contacted with the strong oxidant in the flue 2, insoluble low-valence nitrogen oxide is oxidized into soluble high-valence oxide, the nitrogen oxide is absorbed and converted into a substance dissolved in water, slaked lime absorbs nitrous acid and nitric acid in the flue gas to achieve the aim of denitration, and the index of ultralow emission of the glass fiber kiln nitrogen oxide is achieved through a HTr-3SO efficient combined denitration system.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an HTr-3SO of being applied to glass fiber kiln waste gas treatment unites deNOx systems which characterized in that: the device comprises a desulfurizing tower (1), a flue (2), a hypergravity oxidation system (3), a metering distribution injection system (4), a composite bio-based denitration agent storage and transportation system (5), a compressed air system (6) and a diluted softened water conveying system (7); one end of the flue (2) is communicated with the desulfurizing tower (1); the supergravity oxidation system (3) comprises a 3SO generator (31), an oxidant conveying system (32), a catalyst conveying system (33) and a gas distribution conveying system (34), wherein the oxidant conveying system (32) and the catalyst conveying system (33) are communicated with a gas inlet of the 3SO generator (31) through a tee joint, one end of the gas distribution conveying system (34) is communicated with a gas outlet of the 3SO generator (31), and the gas distribution conveying system (34) is assembled in the flue (2); the metering distribution injection system (4) comprises a glass fiber tank furnace (41) and two spray guns (42), wherein an air outlet of the glass fiber tank furnace (41) is communicated with the other end of the flue (2), and the two spray guns (42) are respectively arranged on the front and rear furnace walls of a refractory brick high-temperature flue gas section right below a vertical steel chimney of the glass fiber tank furnace (41); the composite bio-based denitration agent storage and transportation system (5) and the compressed air system (6) are communicated into the spray gun (42) at the same time; the composite bio-based denitration agent storage and transportation system (5) stores a composite bio-based denitration agent, and the composite bio-based denitration agent comprises a bio-based denitration agent and an auxiliary agent; and the diluted softened water conveying system (7) is communicated with the composite bio-based denitration agent storage and transportation system (5).
2. The HTr-3SO combined denitration system applied to glass fiber kiln waste gas treatment according to claim 1, characterized in that: the oxidant delivery system (32) comprises an oxidant storage tank (321), an oxidant delivery pump (322), and pipeline valves and meters; the outlet of the oxidant storage tank (321) is communicated with the feed inlet of the 3SO generator (31) through a pipeline, a valve and an instrument are arranged on the pipeline, and the oxidant delivery pump (322) is assembled on the pipeline and used for delivering the oxidant in the oxidant storage tank (321) to the 3SO generator (31).
3. The HTr-3SO combined denitration system applied to glass fiber kiln waste gas treatment as claimed in claim 2, wherein: the catalyst conveying system (33) comprises a catalyst storage tank (331), a catalyst conveying pump (332), a pipeline valve and a meter; the outlet of the catalyst storage tank (331) is communicated with the feed inlet of the 3SO generator (31) through a pipeline, the pipeline is provided with a valve and an instrument, and the catalyst delivery pump (332) is assembled on the pipeline and used for delivering the catalyst in the catalyst storage tank (331) to the 3SO generator (31).
4. The HTr-3SO combined denitration system applied to glass fiber kiln waste gas treatment as claimed in claim 3, wherein: the gas distribution conveying system (34) comprises a main pipe and a plurality of branch pipes, one end of the main pipe is communicated with a gas outlet of the 3SO generator (31), the plurality of branch pipes are uniformly distributed at a distance of 100mm, spray holes are formed in each branch pipe at a distance of 50-120mm, and the diameter of each spray hole is 4-6mm, SO that the coverage rate of the chlorine dioxide gas spray nozzle is guaranteed.
5. The HTr-3SO combined denitration system applied to glass fiber kiln waste gas treatment as claimed in claim 4, wherein: the hypergravity oxidation system (3) further comprises a tail alkali liquor washing system (35), the tail alkali liquor washing system (35) is communicated with the flue (2) through a pipeline, and residual nitrogen oxides which are not removed in the flue gas are oxidized into high-valence state through a strong oxidant and are absorbed and removed by the tail alkali liquor washing system (35).
6. The HTr-3SO combined denitration system applied to glass fiber kiln waste gas treatment according to claim 1, characterized in that: the spray gun (42) is movably connected with the kiln wall of the glass fiber tank kiln (41); the spray gun (42) is provided with a liquid pipe, an atomizing air pipe and a cooling air pipe from inside to outside.
7. The HTr-3SO combined denitration system applied to glass fiber kiln waste gas treatment as claimed in claim 6, wherein: the spray nozzle of the spray gun (42) is laterally open and has a fan-shaped spray shape, and the average spray particle size is about 100 microns.
8. The HTr-3SO combined denitration system applied to glass fiber kiln waste gas treatment as claimed in claim 7, wherein: the lance (42) is protected from the internal medium by means of cooling air.
9. The HTr-3SO combined denitration system applied to glass fiber kiln waste gas treatment according to claim 8, wherein: the composite bio-based denitration agent storage and transportation system (5) comprises a composite bio-based storage tank (51), a discharge pump (52), a jacking stirrer (53), a denitration agent delivery pump (54), a valve pipeline and an instrument; the unloading pump (52) is communicated with the composite bio-based storage tank (51) through a pipeline, the jacking stirrer (53) is arranged in the composite bio-based storage tank (51), and a discharge hole of the composite bio-based storage tank (51) is communicated with the spray gun (42) through a pipeline.
10. The HTr-3SO combined denitration system applied to glass fiber kiln waste gas treatment according to claim 9, characterized in that: the diluted softened water conveying system (7) comprises a diluted softened water storage tank (71), a diluted softened water conveying pump (72), a valve pipeline and an instrument; the diluted and softened water storage tank (71) is connected with a pipeline of the composite bio-based denitration agent storage and transportation system (5) through a tee joint and communicated to the spray gun (42), and the diluted and softened water delivery pump (72) is assembled on the pipeline.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116492843A (en) * | 2023-05-25 | 2023-07-28 | 北京市中环博业环境工程技术有限公司 | Denitration method |
| CN116870685A (en) * | 2023-09-06 | 2023-10-13 | 南京中电环保科技有限公司 | HTR-3SO combined high-efficiency denitration device and denitration method |
-
2022
- 2022-04-12 CN CN202210378353.XA patent/CN114849471A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116492843A (en) * | 2023-05-25 | 2023-07-28 | 北京市中环博业环境工程技术有限公司 | Denitration method |
| CN116492843B (en) * | 2023-05-25 | 2024-03-12 | 北京市中环博业环境工程技术有限公司 | Denitration method |
| CN116870685A (en) * | 2023-09-06 | 2023-10-13 | 南京中电环保科技有限公司 | HTR-3SO combined high-efficiency denitration device and denitration method |
| CN116870685B (en) * | 2023-09-06 | 2023-12-29 | 南京中电环保科技有限公司 | HTR-3SO combined high-efficiency denitration device and denitration method |
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