CN209782671U - Industrial boiler flue gas purification device and flue gas oxidation efficiency measuring device - Google Patents
Industrial boiler flue gas purification device and flue gas oxidation efficiency measuring device Download PDFInfo
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- CN209782671U CN209782671U CN201920247887.2U CN201920247887U CN209782671U CN 209782671 U CN209782671 U CN 209782671U CN 201920247887 U CN201920247887 U CN 201920247887U CN 209782671 U CN209782671 U CN 209782671U
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Abstract
The embodiment of the utility model provides a purification device and flue gas oxidation efficiency's survey device of industrial boiler flue gas is provided to gaseous pollutant administers technical field, and this purification device includes: return flue, outlet flue and CH4An oxidizer carrier and a CO oxidizer carrier; the gas inlet of the return flue is communicated with the flue gas outlet of the boiler furnace, and the gas outlet of the return flue is communicated with the gas inlet of the outlet flue; CH (CH)4The oxidant carrier is arranged in the return flue,And the return flue is close to CH4A first heating element is arranged at the oxidant carrier; the CO oxidant carrier is arranged in the outlet flue, and a second heating element is arranged in the outlet flue and close to the CO oxidant carrier. The embodiment of the utility model provides a purifier and flue gas oxidation efficiency's survey device of industrial boiler flue gas can make the flue gas that produces in the boiler carry out the postcombustion, effectively reduces CH in the flue gas4And the emission of CO, so that clean and energy-saving emission of flue gas is realized.
Description
Technical Field
The embodiment of the utility model provides a relate to gaseous pollutant and administer technical field, especially relate to a purifier of industrial boiler flue gas and flue gas oxidation efficiency's survey device.
background
Along with economic development and adjustment of energy structures in China, the proportion of natural gas in the energy structures is greatly increased, and in addition, the natural gas has the advantages of high heat value, cleanness, no waste residue generation after combustion and the like compared with energy sources such as coal, petroleum and the like, so that the natural gas-fired boiler becomes the direction of popularization and development in the future. However, the gas boiler inevitably contains a certain amount of CH which escapes without participating in the combustion reaction during use4And CO, NO produced by the reactionxAnd the like gaseous contaminants. Wherein NOxIs greenhouse effect, acid rain, ozone layer damage and water eutrophicationThe main precursor of photochemical smog and haze, which is the most environmentally problematic atmospheric pollutant, CH4And CO is used as clean fuel and belongs to an important component causing greenhouse effect, so that the direct emission of flue gas generated by an industrial boiler not only can cause energy waste, but also can cause atmospheric pollution and greenhouse effect, and can have certain influence on the quality of life of human beings.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a purifier and flue gas oxidation efficiency's survey device of industrial boiler flue gas for solve among the prior art flue gas burning that industrial boiler discharged and not fully cause environmental pollution's technical problem.
The embodiment of the utility model provides a purifier of industrial boiler flue gas, the device includes: return flue, outlet flue and CH4An oxidizer carrier and a CO oxidizer carrier; the gas inlet of the return flue is communicated with a flue gas outlet of the boiler furnace, and the gas outlet of the return flue is communicated with the gas inlet of the outlet flue; the CH4Oxidant carriers are arranged in the return flue and are close to the CH in the return flue4A first heating element is arranged at the oxidant carrier; the CO oxidant carrier is arranged in the outlet flue, and a second heating element is arranged in the outlet flue and close to the CO oxidant carrier.
Further, the CH4The oxidant carrier is made of first TiO2The surface of the carrier is coated with an alloy body consisting of a platinum layer, a palladium layer, a cerium dioxide layer, a zirconium dioxide layer, a manganese layer and titanium dioxide.
Further, the CO oxidant carrier is composed of second TiO2The surface of the carrier is coated with an alloy body consisting of a platinum layer, a ruthenium layer, an iridium layer, a cerium dioxide layer, a copper layer and a manganese layer.
Further, the first TiO2Support and second TiO2The carriers are respectively in a honeycomb structure.
Further, still include: and the combustion chamber of the low-nitrogen combustor is arranged in the hearth of the boiler, and the air inlet of the low-nitrogen combustor is communicated with the air outlet of the return flue through a circulating pipeline.
Further, still include: and the fan is connected to the air outlet of the outlet flue.
Further, still include: and the waste heat recovery device is arranged on a pipeline communicated with the air outlet of the outlet flue and the fan.
The utility model also provides a survey device of flue gas oxidation catalysis efficiency, this survey device is applied to the aforesaid purifier, include: the tail gas tank group, the gas mixing tank, the three-way valve and the flue gas analyzer; the tail gas tank group consists of a plurality of gas storage tanks of different tail gas gases, wherein at least one CH is included4Each gas storage tank controls the gas output through a quantitative control valve; the CH4The gas storage tank is communicated with a first through valve of the three-way valve, the rest gas storage tanks are converged to a gas mixing tank, a gas outlet of the gas mixing tank is communicated with a second through valve of the three-way valve through a first branch pipeline, and a gas outlet of the gas mixing tank is communicated with a gas inlet of the flue gas analyzer through a second branch pipeline; the first branch pipeline is provided with a first control valve, and the second branch pipeline is provided with a second control valve; a third valve of the three-way valve is communicated with an air inlet of the return pipeline; and the gas outlet of the outlet flue is communicated with the gas inlet of the flue gas analyzer through a pipeline.
Furthermore, the gas outlet of the outlet flue is communicated with a tail gas pipeline, a first switch valve is arranged on the tail gas pipeline, and a second switch valve is arranged on a pipeline for communicating the gas inlet of the return flue with the flue gas outlet of the boiler hearth.
Further, the exhaust tank group includes: CH (CH)4Gas storage tank, CO gas storage tank, NO gas storage tank and CO2Gas storage tank, O2Gas storage tank and N2A gas storage tank; the CH4The gas storage tank is communicated with a first through valve of the three-way valve, and the CO gas storage tank, the NO gas storage tank and the CO gas storage tank are communicated2Gas storage tank, O2Gas storage tank and N2The gas storage tanks are respectively communicated with the gas mixing tank.
The embodiment of the utility model provides a purifier of industrial boiler flue gas improves on traditional industrial boiler's basis, can make the flue gas that produces in the boiler carry out the postcombustion, with the CH of not fully burning4Fully oxidizing with CO and harmful gas generated by incomplete combustion to generate harmless CO2Waiting for the gas, then discharging the gas as tail gas, effectively reducing CH in the flue gas4And the emission amount of CO, so that clean and energy-saving emission of flue gas is realized; and simultaneously, the utility model discloses a purifier can also pass through regulation and control temperature and select to use CH4Oxidant carrier and CO oxidant carrier, so as to raise CH content in industrial boiler fume4And oxidative conversion of CO.
the embodiment of the utility model provides a survey device of flue gas oxidation efficiency is applied to the aforesaid purifier of industrial boiler flue gas, can effectively survey this purifier's CH4and the oxidation conversion rate of CO, and timely replacing CH with lower catalytic activity in the purification device according to the measurement result4Oxidant carrier and CO oxidant carrier, guarantee that the purifier of industrial boiler flue gas has higher oxidation efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of the flue gas purification device of an industrial boiler according to the present invention;
Fig. 2 is a schematic structural diagram of an embodiment of the device for measuring the oxidation efficiency of flue gas of the present invention.
Wherein:
1-return flue; 1 a-an air inlet of a return pipeline; 1 b-an air outlet of the return pipeline; 2-an outlet flue; 3-CH4An oxidant carrier; 4-CO oxidizing agent carrierA body; 5-a first heating element; 6-a second heating element; 7-low nitrogen burner; 8-a fan; 9 a-a first waste heat recovery device; 9 b-a second waste heat recovery device; 10-industrial boiler; 11-a tail gas tank group; 12-gas mixing tank; 13-three-way valve; 14-a flue gas analyzer; 15-a first control valve; 16-a second control valve; 17-circulation line.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 shows a schematic structural diagram of an embodiment of the purification device for flue gas of an industrial boiler of the present invention, as shown in fig. 1, the purification device comprises: return flue 1, outlet flue 2, CH4An oxidizer carrier 3 and a CO oxidizer carrier 4; the gas inlet 1a of the return flue is communicated with a flue gas outlet of a boiler furnace, and the gas outlet 1b of the return flue is communicated with the gas inlet of the outlet flue 2; the CH4The oxidant carrier 3 is arranged in the return flue 1, and the return flue 1 is close to the CH4A first heating element 5 is arranged at the oxidant carrier 3; the CO oxidizer carrier 4 is disposed in the outlet flue 2, and a second heating element 6 is disposed in the outlet flue 2 adjacent to the CO oxidizer carrier 4.
Specifically, CH4the oxidant carrier 3 is made of first TiO2The surface of the carrier is sequentially provided with an alloy body consisting of a platinum layer, a palladium layer, a cerium dioxide layer, a zirconium dioxide layer, a manganese layer and titanium dioxide, namely the titanium dioxide is taken as the carrier, and the surface of the alloy body is coated with a layer of alloy combination made of platinum, palladium, cerium dioxide, zirconium dioxide, manganese and the like, wherein the platinum layer, the palladium layer, the cerium dioxide layer, the zirconium dioxide layer and the manganese layer on the surface of the titanium dioxide,the coating sequence and the upper and lower layer positions of each layer are not limited, the utility model discloses a protection scope, preferably at the surface of titanium dioxide from inside to outside in proper order coating platinum layer, palladium layer, cerium dioxide layer, zirconium dioxide layer, manganese layer. Such CH4The oxidant carrier 3 can generate excellent catalytic oxidation effect at the high temperature of 450-600 ℃ under the temperature regulation of the first heating element 5, and CH in the flue gas4The oxidation conversion rate of the catalyst can reach more than 73 percent, and the oxidation conversion rate of the catalyst can reach more than 90 percent within the temperature range of 475-600 ℃.
CH4The shape of the oxidant carrier 3 is preferably a honeycomb structure, and the honeycomb structure can be fully contacted with the flue gas, so that the reaction area is increased, and the oxidation efficiency is improved.
Preferably the CH4The mass content ratio of each component of the oxidant carrier 3 is respectively as follows: 0 to 1 wt% of platinum, 0 to 1 wt% of palladium, 0 to 20 wt% of cerium dioxide, 0 to 15 wt% of zirconium dioxide, 0 to 1.5 wt% of manganese, and 0 to 80 wt% of titanium dioxide carrier.
The first heating element 5 is used for heating the inside of the return flue 1 to provide high-temperature reaction conditions, and can adopt a thermocouple rod, be inserted into the return flue 1 through a jack for heating, and be connected with an external heating temperature control device for temperature adjustment and control, but not limited thereto. To facilitate the oxidation reaction, the first heating element 5 is arranged close to CH4Oxidant carrier 3.
The first oxidation reaction is carried out on the flue gas in the return flue 1, and the process is as follows: the inside of the return flue 1 is heated to 450-600 ℃ by the first heating element 5, and the flue gas generated in the industrial boiler 10 enters the return flue 1 through the flue, wherein the flue gas and CH4The oxidant carrier 3 is fully contacted, so that oxidation catalytic reaction is generated, and the flue gas after the first oxidation reaction is discharged from the gas outlet 1a of the return flue and enters the outlet flue 2.
In the return flue 1, the flue gas is subjected to a first oxidation reaction, so that CH in the flue gas can be effectively improved4Oxidation conversion of CH in flue gas4Fully oxidized and converted into harmless CO2The gas is discharged out of the flue after being exhausted, thereby effectively reducing the pressureLess CH in smoke4The emission amount of the flue gas is finally realized, and the clean and energy-saving emission of the flue gas is realized.
The CO oxidant carrier 4 is made of second TiO2The alloy body that the support surface coating platinum layer, ruthenium layer, iridium layer, cerium dioxide layer, copper layer, manganese layer constitute, use titanium dioxide as the support, the alloy body that alloy combination such as a layer platinum, ruthenium, iridium, cerium dioxide, copper, manganese was made is coated on its surface, wherein, platinum layer, ruthenium layer, iridium layer, cerium dioxide layer, copper layer, manganese layer on titanium dioxide surface, its order of coating and the upper and lower layer position that each layer was located do not limit, all are in the protection scope of the utility model, preferably coat platinum layer, palladium layer, cerium dioxide layer, zirconium dioxide layer, manganese layer in proper order from inside to outside on the surface of titanium dioxide. The CO oxidant carrier 4 can generate an excellent catalytic oxidation effect at a high temperature of 100-150 ℃ under the temperature regulation of the second heating element 6, the oxidation conversion rate of CO in flue gas can reach more than 92%, and the oxidation conversion rate of CO in the flue gas can reach more than 95% within a temperature range of 130-150 ℃.
The shape of the CO oxidant carrier 4 can be spherical, flaky or honeycomb-shaped, preferably a honeycomb-shaped structure is manufactured by adopting a honeycomb extrusion type or honeycomb coating type process, the honeycomb-shaped structure can be in full contact with flue gas, the reaction area is increased, and the oxidation efficiency is improved.
Preferably, the mass content ratio of each component of the CO oxidizer carrier 4 is: 0 to 1 wt% of platinum, 0 to 1 wt% of ruthenium, 0 to 1 wt% of iridium, 0 to 20 wt% of cerium dioxide, 0 to 1.5 wt% of copper, 0 to 1.5 wt% of manganese, and 0 to 80 wt% of titanium dioxide carrier.
The second heating element 6 is used for heating the inside of the outlet flue 2 to provide high-temperature reaction conditions, and can also adopt a thermocouple rod which is inserted into the outlet flue 2 through a jack for heating, and is connected with an external heating temperature control device for temperature adjustment and control, but not limited to this. To facilitate the oxidation reaction, a second heating element 6 is arranged close to the CO oxidizer carrier 4.
The second oxidation reaction is carried out on the flue gas in the outlet flue 2, the flue gas is arranged at the gas outlet 1b of the return flue, the flue gas is firstly subjected to the first oxidation reaction in the return flue 1, and then the second oxidation reaction is carried out, so that the secondary oxidation purification treatment is realized, and the purification process is as follows: after entering the return flue 1 and undergoing a first oxidation reaction, flue gas generated in the industrial boiler 10 is discharged from the gas outlet 1b of the return flue and enters the outlet flue 2, the outlet flue 2 is heated to 100-150 ℃ by the second heating element 6, the flue gas is fully contacted with the CO oxidant carrier 4, and the flue gas is discharged from the gas outlet of the outlet flue 2 after undergoing an oxidation catalytic reaction.
In the outlet flue 2, the flue gas is subjected to a second oxidation reaction, so that the oxidation conversion rate of CO in the flue gas can be effectively improved, and the CO in the flue gas is fully oxidized and converted into harmless CO2The gas is discharged out of the flue, so that the emission of CO in the flue gas is effectively reduced, and the clean and energy-saving emission of the flue gas is finally realized.
In addition, in order to increase the smoke and CH4The contact area of the oxidizer carrier 3 can be formed into honeycomb CH4The oxidant carrier 3 is arranged at the gas outlet 1b of the return flue and blocks the gas outlet, and the honeycomb hole core is placed along the direction of the circulation of the flue gas; similarly, in order to increase the contact area between the flue gas and the CO oxidizer carrier 4, the CO oxidizer carrier 4 in a honeycomb shape may be installed at the gas outlet of the outlet flue 2 and block the gas outlet, and the honeycomb core is placed along the direction of flue gas flow. Guide plates can be arranged at the air inlet 1a of the return flue and the air inlet of the outlet flue 2.
The utility model discloses a purifier can be applied to the flue gas of trades such as coking, sintering, glass, chemical industry, gas and administer, is particularly useful for the flue gas of burning the industrial boiler of natural gas or coal gas to administer, this kind of industrial boiler who fires natural gas or coal gas uses natural gas or coal gas as the energy, have advantages such as the calorific value is high, clean, no waste residue produces after the burning, however the tradition fires natural gas or coal gas boiler and has the insufficient condition of burning, can have a certain amount of CH that does not participate in the burning in its exhaust fume tail gas4Or CO, and harmful gases produced by incomplete reactions, e.g. NO, CO, CH, affecting the quality of the air4、CO2And the like. The utility model discloses a purifier improves on traditional industrial boiler's basis, can make the flue gas that produces in the boilerSecondary combustion is carried out, and CH which is not fully combusted is subjected to secondary combustion4Fully oxidizing with CO and harmful gas generated by incomplete combustion to generate harmless CO2Waiting for the gas, then discharging the gas as tail gas, effectively reducing CH in the flue gas4And the emission amount of CO, so that clean and energy-saving emission of flue gas is realized; and simultaneously, the utility model discloses a purifier can also pass through regulation and control temperature and select to use CH4Oxidizer carrier 3 and CO oxidizer carrier 4 to increase CH in flue gas of industrial boiler 104And oxidative conversion of CO.
On the basis of each embodiment, the utility model discloses a purifier still includes: and the low-nitrogen combustor 7 is arranged in the combustion chamber of the low-nitrogen combustor 7 in the hearth of the boiler 10, and the air inlet of the low-nitrogen combustor is communicated with the air outlet 1b of the return flue through a circulating pipeline 17. After the flue gas in the return flue 1 is subjected to the first oxidation reaction, part of the flue gas can enter the boiler 10 again through the circulating pipeline 17 for low-nitrogen combustion, so that the concentration of nitrogen oxide at the outlet can be controlled at 30mg/m3In the range, the haze precursor-NO in the smoke is further reducedxThe clean and energy-saving discharge is realized.
On the basis of each embodiment, the utility model discloses a purifier still includes: fan 8, this fan 8 is connected in the gas outlet department of export flue 2, and chimney is connected to its fan 8 outlet flue. After the flue gas in the industrial boiler 10 enters the return flue 1 and the outlet flue 2 for two oxidation reactions, the flue gas tail gas is discharged into a chimney through a fan 8.
On the basis of each embodiment, the utility model discloses a purifier still can set up waste heat recovery device, sets up first waste heat recovery device 9a between return flue 1 and export flue 2, sets up second waste heat recovery device 9b in the gas outlet department of export flue 2, utilizes the exothermic promotion flue gas temperature of oxidation, improves energy utilization and rate of recovery and energy rate of recovery. Specifically, an inlet of the first waste heat recovery device 9a is communicated with an air outlet 1b of the return flue, and an outlet of the first waste heat recovery device 9a is communicated with an air inlet of the outlet flue 2; the inlet of the second waste heat recovery device 9b is communicated with the air inlet of the outlet flue 2, and the outlet of the second waste heat recovery device 9b is connected with the fan 8. First waste heat recovery device 9a and second waste heat recovery device 9b all can adopt small-size waste heat recovery device, utilize the exothermic heat recovery flue gas of oxidation to circulate the heat energy that produces of in-process to promote the temperature of flue gas, and energy utilization and energy recovery rate.
The utility model also provides a survey device of flue gas oxidation catalytic efficiency, the device can be applied to the purifier of above-mentioned industrial boiler flue gas, realizes this purifier's purification efficiency's survey.
Fig. 2 shows a schematic structural diagram of an embodiment of the device for measuring the oxidation efficiency of flue gas of the present invention, as shown in fig. 2, the device includes: the tail gas tank group 11, the mixed gas tank 12, the three-way valve 13 and the flue gas analyzer 14; wherein:
The tail gas tank group 11 consists of a plurality of gas storage tanks of different tail gas gases, wherein at least one CH is included4Each gas storage tank controls the gas output through a quantitative control valve. Specifically, the tail gas tank group 11 is preferably composed of CH4Gas storage tank, CO gas storage tank, NO gas storage tank and CO2Gas storage tank, O2gas storage tank and N2A gas storage tank; wherein, CH4the gas storage tank is communicated with a first through valve of the three-way valve 13, and the CO gas storage tank, the NO gas storage tank and the CO gas storage tank are communicated2Gas storage tank, O2Gas storage tank and N2The gas tanks each open into a gas-mixing tank 12. The quantitative control valve is connected with the mass flow controller and the display to realize quantitative control of gas output.
The gas outlet of the gas mixing tank 12 is communicated with the second valve of the three-way valve 13 through a first branch pipeline, and the gas outlet of the gas mixing tank 12 is communicated with the gas inlet of the flue gas analyzer 14 through a second branch pipeline; wherein, the first branch pipeline is provided with a first control valve 15, and the second branch pipeline is provided with a second control valve 16; a third valve 13 of the three-way valve 13 is communicated with the air inlet 1a of the return pipeline; the air outlet 1b of the outlet flue 2 is communicated with the air inlet of the flue gas analyzer 14 through a pipeline.
CH4The oxidant carrier 3 is supported in the return flue 1 by quartz wool, the upper opening of the flue is plugged by a rubber plug, and the first heating element 5 passes through the rubber plug and directly abuts against CH4Oxidant carrier3, the heating temperature of the first heating element 5 is controlled by a temperature controller at the gas-solid critical part of the upper end surface of the heater, thereby controlling CH4The temperature of the oxidant carrier 3, the temperature T controlled in the return flue 11The range is preferably 450-600 ℃; the CO oxidant carrier 4 is supported in the outlet flue 2 by quartz wool, an opening above the flue is plugged by a rubber plug, the first heating element 5 penetrates through the rubber plug and directly abuts against the gas-solid critical position of the upper end surface of the CO oxidant carrier 4, and the heating temperature of the second heating element 6 is controlled by a temperature controller, so that the temperature of the CO oxidant carrier 4 and the controlled temperature T in the outlet flue 2 are controlled2The preferable range is 100 to 150 ℃.
All the devices are connected by polytetrafluoroethylene tubes with the diameter of 3 mm.
The measuring apparatus of the present embodiment is a measuring apparatus for CH in the return flue 1 and the outlet flue 2 when the industrial boiler 10 is in a stopped state4And the oxidation performance of CO. The detection process is as follows: first, the first control valve 15 is controlled to be closed, the second control valve 16 is controlled to be opened, and the simulated smoke (i.e. CO, NO, CH) in the gas mixing tank 12 is at the moment4、CO2、O2And N2Mixed gas formed by mixing, N2Is balance gas) enters the flue gas analyzer 14 from the second branch pipeline, and NO, CO and CH in inlet flue gas are measured4、CO2And O2Concentration; secondly, the first control valve 15 is controlled to be opened, the second control valve 16 is controlled to be closed, the simulated flue gas in the gas mixing tank 12 enters the return flue 1 and the outlet flue 2 through the three-way valve 13 in sequence at the moment, the heating temperatures of the return flue 1 and the outlet flue 2 are controlled at the same time, the simulated flue gas carries out first oxidation reaction and second oxidation reaction through a catalyst bed layer under the condition of high temperature, the flue gas after the reaction is discharged and enters the flue gas analyzer 14, and NO, CO and CH after the reaction are measured4、CO2And O2And (4) concentration. CH was calculated by the following conversion calculation formula4And CO conversion: CH (CH)4Conversion ([ CH ]4]Inlet port-[CH4]An outlet)/[CH4]Inlet portX is 100%; CO conversion ([ CO)]Inlet port-[CO]An outlet)/[CO]Inlet port×100％。
In order to facilitate the simulation of the discharge of flue gas and flue gas in the industrial boiler 10, a tail gas pipeline can be connected to the gas outlet of the outlet flue 2, and the tail gas pipeline is provided with a first switch valve; in order to prevent the leakage of the simulated flue gas in the measuring process, a second switch valve is arranged on a pipeline which is communicated with the gas inlet 1a of the return flue and the flue gas outlet of the boiler hearth.
finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A purification device for industrial boiler flue gas, characterized by comprising: return flue, outlet flue and CH4An oxidizer carrier and a CO oxidizer carrier;
The gas inlet of the return flue is communicated with a flue gas outlet of the boiler furnace, and the gas outlet of the return flue is communicated with the gas inlet of the outlet flue;
The CH4Oxidant carriers are arranged in the return flue and are close to the CH in the return flue4A first heating element is arranged at the oxidant carrier;
The CO oxidant carrier is arranged in the outlet flue, and a second heating element is arranged in the outlet flue and close to the CO oxidant carrier.
2. The flue gas purification device of industrial boiler according to claim 1, characterized in that said CH4The oxidant carrier is made of first TiO2The surface of the carrier is coated with an alloy body consisting of a platinum layer, a palladium layer, a cerium dioxide layer, a zirconium dioxide layer, a manganese layer and titanium dioxide.
3. The flue gas purification device of industrial boiler according to claim 2, wherein the CO oxidizer carrier is made of second TiO2The surface of the carrier is coated with an alloy body consisting of a platinum layer, a ruthenium layer, an iridium layer, a cerium dioxide layer, a copper layer and a manganese layer.
4. the flue gas purification device of industrial boiler according to claim 3, wherein the first TiO is2Support and second TiO2The carriers are respectively in a honeycomb structure.
5. The flue gas purification device of an industrial boiler according to any one of claims 1 to 4, further comprising: and the combustion chamber of the low-nitrogen combustor is arranged in the hearth of the boiler, and the air inlet of the low-nitrogen combustor is communicated with the air outlet of the return flue through a circulating pipeline.
6. the flue gas purification device of an industrial boiler according to claim 5, further comprising: and the fan is connected to the air outlet of the outlet flue.
7. The flue gas purification device of an industrial boiler according to claim 6, further comprising: and the waste heat recovery device is arranged on a pipeline communicated with the air outlet of the outlet flue and the fan.
8. An apparatus for measuring the oxidation efficiency of flue gas, which is applied to the purification apparatus according to any one of claims 1 to 7, comprising: the tail gas tank group, the gas mixing tank, the three-way valve and the flue gas analyzer;
The tail gas tank group consists of a plurality of gas storage tanks of different tail gas gases, wherein at least one CH is included4Each gas storage tank controls the gas output through a quantitative control valve;
The CH4Gas storage tank and first through valve of three-way valveThe doors are communicated, the rest gas storage tanks are communicated to a gas mixing tank, the gas outlet of the gas mixing tank is communicated with the second valve of the three-way valve through a first branch pipeline, and the gas outlet of the gas mixing tank is communicated with the gas inlet of the flue gas analyzer through a second branch pipeline; the first branch pipeline is provided with a first control valve, and the second branch pipeline is provided with a second control valve;
A third valve of the three-way valve is communicated with an air inlet of the return pipeline;
And the gas outlet of the outlet flue is communicated with the gas inlet of the flue gas analyzer through a pipeline.
9. The measuring device according to claim 8, wherein a tail gas pipeline is further communicated with the gas outlet of the outlet flue, a first switch valve is arranged on the tail gas pipeline, and a second switch valve is arranged on a pipeline which is communicated with the flue gas outlet of the boiler furnace from the gas inlet of the return flue.
10. The assay device of claim 8, wherein the set of off-gas canisters comprises: CH (CH)4gas storage tank, CO gas storage tank, NO gas storage tank and CO2Gas storage tank, O2Gas storage tank and N2a gas storage tank; the CH4The gas storage tank is communicated with a first through valve of the three-way valve, and the CO gas storage tank, the NO gas storage tank and the CO gas storage tank are communicated2Gas storage tank, O2Gas storage tank and N2The gas storage tanks are respectively communicated with the gas mixing tank.
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| CN201920247887.2U CN209782671U (en) | 2019-02-27 | 2019-02-27 | Industrial boiler flue gas purification device and flue gas oxidation efficiency measuring device |
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| CN201920247887.2U CN209782671U (en) | 2019-02-27 | 2019-02-27 | Industrial boiler flue gas purification device and flue gas oxidation efficiency measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432932A (en) * | 2021-06-08 | 2021-09-24 | 北京市劳动保护科学研究所 | Catering oil smoke pollutant sampling device |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432932A (en) * | 2021-06-08 | 2021-09-24 | 北京市劳动保护科学研究所 | Catering oil smoke pollutant sampling device |
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