CN114894954A - Catalyst performance detection device - Google Patents

Catalyst performance detection device Download PDF

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Publication number
CN114894954A
CN114894954A CN202210644835.5A CN202210644835A CN114894954A CN 114894954 A CN114894954 A CN 114894954A CN 202210644835 A CN202210644835 A CN 202210644835A CN 114894954 A CN114894954 A CN 114894954A
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China
Prior art keywords
flue gas
heating unit
catalyst performance
temperature
reaction
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Pending
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CN202210644835.5A
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Chinese (zh)
Inventor
龙吉生
曹玮
刘露
徐尔琨
杨红
孙中涛
劳云枫
高爽
赵光锐
刘晓楠
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Shanghai SUS Environment Co Ltd
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Shanghai SUS Environment Co Ltd
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Priority to CN202210644835.5A priority Critical patent/CN114894954A/en
Publication of CN114894954A publication Critical patent/CN114894954A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/10—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using catalysis
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention discloses a catalyst performance detection device, which comprises: the gas inlet pipe is communicated with a deacidified outlet flue in the waste incineration line, and a first flue gas analyzer is arranged in the gas inlet pipe to measure the initial concentration of each pollutant in the flue gas in the gas inlet pipe; the heating unit is communicated with the air inlet pipe so as to heat the flue gas introduced by the air inlet pipe to a preset temperature; the reaction unit is arranged at the downstream of the heating unit and comprises an ammonia spraying device and an SCR (selective catalytic reduction) reactor, and the flue gas at the preset temperature enters the SCR reactor after being sprayed with ammonia and reacts under the catalytic action of a catalyst in the SCR reactor; the gas outlet pipe is arranged at the downstream of the reaction unit, and a second flue gas analyzer is arranged in the gas outlet pipe to measure the final concentration of each pollutant in the flue gas after the SCR reaction; and the fan drives the flue gas to enter from the air inlet pipe and discharge from the air outlet pipe. The catalyst performance detection device disclosed by the invention is communicated with a waste incineration line so as to ensure the accuracy of catalyst performance detection by adopting the reaction of flue gas in the production process under the catalytic action of the catalyst.

Description

Catalyst performance detection device
Technical Field
The invention relates to the technical field of catalyst detection, in particular to a catalyst performance detection device.
Background
In recent years, with the implementation of urbanization and sustainable development strategies, the treatment process of municipal solid waste is particularly important, and at present, one of the most important treatment modes of the solid waste is treatment by incineration.
However, due to the various types of domestic garbage, in the incineration process of domestic garbage, the problem that combustion objects are complicated and changeable exists, the proportion of the types of pollutants is difficult to determine, and dioxin and NO are contained in the combusted flue gas X The emission characteristics of pollutants such as Nitrogen Oxides (NOX) and Total Organic Carbon (TOC) are unknown, and the incompletely treated smoke is easy to cause serious pollution.
In the prior art, NO X The degradation of the gaseous pollutants is mostly treated by SCR (selective catalytic reduction), and ammonia (NH) is adopted 3 ) By using NO as a reducing agent X Selectively reduced to N 2 The method has the advantages of no by-product, no secondary pollution, high removal efficiency and the like. In the reaction process, a catalyst is required to promote NH in a certain temperature range 3 And NO X By reduction reaction of (2) to form N 2 And water, but not with the oxygen in the flue gas, so the type and working temperature of the catalyst are very important. The existing catalyst performance detection process is mostly carried out in a laboratory, the simulation of the flue gas before reaction is carried out by a flue gas simulation unit, and the content of pollutants in the flue gas before and after the simulated flue gas is subjected to catalytic reaction of the catalyst and analysis treatmentTo evaluate the performance of the catalyst for reuse in actual industrial processes. However, because the experimental flue gas is artificially simulated, compared with flue gas with various states in the actual industrial process, the components have certain differences; on the other hand, in the actual industrial process, because the content of pollutants in the flue gas also changes along with the change of the temperature in the incineration stage, the problem that the experimental result is inaccurate due to the difference of the flue gas temperature in the actual operation process when the flue gas at a certain stage is subjected to research experiments.
Therefore, how to detect the synergistic catalytic action of the catalyst on pollutants in the flue gas in actual working conditions so as to analyze and improve the catalyst is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a catalyst performance detection apparatus for detecting the synergistic catalytic effect of a catalyst on pollutants in flue gas under actual conditions, and analyzing and improving the catalyst
In order to achieve the purpose, the invention provides the following technical scheme:
a catalyst performance detection apparatus comprising:
the inlet pipe, the export flue after the deacidification in intake pipe intercommunication waste incineration line, be provided with first flue gas analyzer in the intake pipe, first flue gas analyzer is used for detecting at least NO in the flue gas in the intake pipe X The initial concentration of (a);
the heating unit is communicated with the air inlet pipe so as to heat the flue gas introduced into the air inlet pipe to a preset temperature;
the reaction unit is arranged at the downstream of the heating unit and comprises an ammonia spraying device and an SCR (selective catalytic reduction) reactor, and flue gas at a preset temperature enters the SCR reactor after being sprayed with ammonia by the ammonia spraying device so as to react under the catalytic action of a catalyst in the SCR reactor;
the gas outlet pipe is arranged at the downstream of the reaction unit, a second flue gas analyzer is arranged in the gas outlet pipe, and the second flue gas analyzer analyzes the second flue gasThe instrument is at least used for detecting NO in the smoke after SCR reaction X The fan is used for driving the flue gas to enter from the air inlet pipe and discharge from the air outlet pipe.
Preferably, in the catalyst performance detection apparatus, a first temperature measurement sensor is disposed at an inlet of the heating unit, the first temperature measurement sensor is configured to measure a temperature of the flue gas entering the heating unit, and the heating unit selects different heating modes according to a difference between a temperature value measured by the first temperature measurement sensor and the preset temperature, so as to heat the flue gas with different powers.
Preferably, in the catalyst performance detection apparatus, when a difference between a temperature value measured by the first temperature measurement sensor and the preset temperature is 0 ℃ to 50 ℃, the heating unit selects a normal heating mode; when the difference value is 50-100 ℃, the heating unit selects a high-efficiency heating mode; when the difference value is 100-150 ℃, the heating unit selects a strong heating mode.
Preferably, in the catalyst performance detection device, a second temperature sensor is disposed at an outlet of the heating unit, and the second temperature sensor is configured to detect a temperature of the flue gas heated by the heating unit, so as to determine a temperature of the flue gas entering the SCR reactor.
Preferably, in the catalyst performance detection apparatus, the SCR reactor includes a first reaction zone and a second reaction zone, and the first reaction zone and the second reaction zone are connected in series or in parallel.
Preferably, in the catalyst performance detection apparatus, in the SCR reactor, the first reaction region has a double-layer structure, and the second reaction region has a single-layer structure.
Preferably, in the catalyst performance detection device, the air inlet pipe and the air outlet pipe are both provided with reserved holes, and the reserved holes are used for measuring the concentration of pollutants in the flue gas by using the handheld flue gas measurement device.
Preferably, in the catalyst performance detection apparatus described above, a dust remover provided between the intake pipe and the heating unit is further included.
Preferably, in the catalyst performance detection apparatus described above, the dust remover is a bag dust remover.
Preferably, in the catalyst performance detection device, the ammonia injection device comprises a liquid ammonia tank and a spray gun, which are communicated with each other, and the spray gun is arranged at an inlet of the SCR reactor.
Preferably, in the catalyst performance detection device, the temperature of the flue gas heated by the heating unit is 150-300 ℃.
Preferably, in the catalyst performance detection device, the flow rate of the fan is 1000Nm3/h-1200Nm3/h, the pressure is 5500Pa-6000Pa, and the power is 9kw-11 kw.
Preferably, in the above catalyst performance detection apparatus, the heating unit includes an electric heater for heating the flue gas.
Preferably, in the catalyst performance detection apparatus described above, the heating unit and the reaction unit are hermetically connected by a flange.
Preferably, in the catalyst performance detection device, the gas outlet pipe is communicated with a waste incineration line to perform industrial treatment on the flue gas.
According to the technical scheme, the catalyst performance detection device comprises the air inlet pipe, the heating unit, the reaction unit, the air outlet pipe and the fan, wherein the air inlet pipe is communicated with the deacidified outlet flue in the waste incineration line, SCR reaction is carried out on the deacidified flue gas on the waste incineration line in the next step, the deacidified flue gas is selected as the flue gas for detecting the catalyst performance, the air inlet pipe is internally provided with the first flue gas analyzer, and the first flue gas analyzer is at least used for detecting NO in the flue gas in the air inlet pipe X The initial concentration of (a); the flue gas entering through the air inlet pipe is introduced into the heating unit to heat the flue gas, the flue gas is introduced into the reaction unit at the downstream of the heating unit to carry out SCR reaction after the flue gas is heated to a preset temperature, it needs to be described that the performance detection of the catalyst needs to be carried out at a specific temperature, the temperature of the flue gas is determined according to the selection of the catalyst, namely the preset temperature, and the flue gas can be cooled in the conveying process, so that the catalyst can be ensuredThe accuracy of performance detection, the flue gas that reacts need to use heating unit heating to preset temperature back rethread reaction unit and reacts.
The reaction unit comprises an ammonia spraying device and an SCR reactor, the flue gas enters the SCR reactor after being sprayed with ammonia through the ammonia spraying device, SCR reaction is carried out under the catalytic action of a catalyst in the SCR reactor, the flue gas after reaction is discharged through an air outlet pipe arranged at the downstream of the SCR reactor, a second flue gas analyzer is arranged in the air outlet pipe to analyze NO in the flue gas after SCR reaction in the air outlet pipe X By comparison with NO in the flue gas X The initial concentration and the final concentration of the catalyst in the SCR reactor, and in addition, the process that the flue gas flows through various devices from the gas inlet pipe and is discharged from the gas outlet pipe is driven by a fan. The invention provides a catalyst performance detection device, wherein an air inlet pipe is communicated with an outlet flue after deacidification in a waste incineration line in the production process, so that flue gas in the actual working condition is introduced into the catalyst performance detection device, the flue gas enters from the air inlet pipe under the drive of a fan, then sequentially passes through a heating unit and a reaction unit and then is discharged from an air outlet pipe, the flue gas enters into the reaction unit after being heated to the preset temperature required by the catalytic reaction of a catalyst through the heating unit, enters into an SCR (selective catalytic reduction) reactor after passing through an ammonia spraying device in the reaction unit for ammonia spraying, reacts under the catalytic action of the catalyst in the SCR reactor, and a first flue gas analyzer arranged in the air inlet pipe is used for measuring NO (nitric oxide) in the flue gas X And measuring NO in the flue gas by a second flue gas analyzer arranged in the gas outlet pipe X Comparing the initial concentration with the final concentration to determine the catalytic performance of the catalyst at a preset temperature; it should be noted that the first flue gas analyzer and the second flue gas analyzer can also detect the catalytic performance of other kinds of catalysts by measuring the concentration of other pollutants in the flue gas.
In addition, the catalyst performance detection device provided by the invention can detect the performance of the same catalyst at different temperatures by changing the temperature of the heating unit for heating the flue gas; the heating effect of the heating unit can also be adjusted to detect the catalytic performance of the replaced catalyst at different temperatures after the SCR reactor replaces the catalyst type.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a catalyst performance detection apparatus according to an embodiment of the present invention;
FIG. 2 is a top view of a catalyst performance testing apparatus according to an embodiment of the present invention;
wherein, 10 is the intake pipe, 110 is first flue gas analysis appearance, 20 is the heating unit, 210 is first temperature sensor, 220 is the second temperature sensor, 30 is the reaction unit, 310 is the ammonia injection device, 3110 is the liquid ammonia jar, 3120 is the spray gun, 320 is the SCR reactor, 40 is the outlet duct, 410 is the second flue gas analysis appearance, 50 is the fan, 60 is the dust remover.
Detailed Description
The core of the invention is to disclose a catalyst performance detection device which can detect the synergistic catalysis of the catalyst on pollutants in flue gas under actual working conditions so as to analyze and improve the catalyst.
Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
As shown in fig. 1 and 2, the catalyst performance detection apparatus provided by the present invention includes an air inlet pipe 10, a heating unit 20, a reaction unit 30, an air outlet pipe 40, and a fan 50, wherein a first flue gas analyzer 110 is disposed in the air inlet pipe 10, and a second flue gas analyzer 410 is disposed in the air outlet pipe 40.
One end of the air inlet pipe 10 is communicated with an outlet flue after deacidification in a waste incineration line, so that flue gas after deacidification in the actual incineration process is introduced into a catalyst performance detection device, it should be noted that in the actual production process, flue gas needs to be deacidified by a semi-dry humidification method and discharged after SCR reaction before being discharged, so that flue gas after deacidification is selected to be subjected to a catalyst performance detection experiment to judge the catalytic performance of a catalyst in the SCR reaction process, flue gas after deacidification is introduced into the catalyst performance detection device through the air inlet pipe 10, and the initial concentration of each pollutant in the flue gas in the air inlet pipe 10 is detected by a first flue gas analyzer 110.
The other end of the air inlet pipe 10 is communicated with a heating unit 20 to heat the flue gas, and after the flue gas is heated to a preset temperature, introducing the flue gas into a reaction unit 30 at the downstream of the heating unit 20 for SCR reaction, wherein the performance detection of the catalyst needs to be carried out at a specific temperature, the temperature of the flue gas is determined according to the selection of the catalyst, namely the preset temperature, because the flue gas can be cooled in the conveying process, the temperature of the flue gas when reaching the reaction unit 30 is different from the original temperature, in order to ensure the accuracy of the catalyst performance detection, the flue gas for reaction needs to be heated to a preset temperature by using the heating unit 20 and then introduced into the reaction unit 30 for reaction, meanwhile, the heating unit 20 may also heat the flue gas to different temperatures to detect the catalytic performance of the same catalyst at different temperatures, and the preset temperature is set according to the experimental needs.
The reaction unit 30 includes an ammonia injection device 310 and an SCR reactor 320, the flue gas enters the SCR reactor 320 after passing through the ammonia injection device 310 for ammonia injection, SCR reaction is performed under the catalytic action of a catalyst in the SCR reactor 320, the flue gas after reaction is discharged through an outlet pipe 40 arranged at the downstream of the SCR reactor 320, and a second flue gas analyzer 410 arranged in the outlet pipe 40 analyzes NO in the flue gas after SCR reaction in the outlet pipe 40 X By comparison with NO in the flue gas X To analyze the performance of the catalyst in the SCR reactor 320, and in addition, the flue gas is discharged from the outlet duct 40 after passing through various devices from the inlet duct 10 by the blower 50Driving is performed.
It should be noted that the first flue gas analyzer 110 and the second flue gas analyzer 410 can also detect the catalytic performance of other kinds of catalysts by measuring the concentration of other pollutants in the flue gas.
The catalyst performance detection device provided by the invention has the advantages that the air inlet pipe 10 is communicated with the outlet flue after deacidification in a waste incineration line in the production process, so that the flue gas in the actual working condition is introduced into the catalyst performance detection device, the flue gas enters from the air inlet pipe 10 under the drive of the fan 50, then sequentially passes through the heating unit 20 and the reaction unit 30 and then is discharged from the air outlet pipe 40, wherein the flue gas is heated to the preset temperature required by the catalytic reaction of the catalyst by the heating unit 20, enters the reaction unit 30, passes through the ammonia spraying device 310 in the reaction unit 30 for ammonia spraying, enters the SCR reactor 320, reacts under the catalytic action of the catalyst in the SCR reactor 320, and the NO in the flue gas is measured by the first flue gas analyzer 110 arranged in the air inlet pipe 10 X And NO in the flue gas is measured by the second flue gas analyzer 410 disposed in the outlet duct 40 X Comparing the initial concentration with the final concentration to determine the catalytic performance of the catalyst in the SCR reaction process of the flue gas in the actual operation process at the preset temperature.
In addition, because the catalyst performance detection device provided by the invention is provided with the heating unit 20, the performance of the same catalyst at different temperatures can be detected by changing the temperature of the flue gas heated by the heating unit 20; it is also possible to adjust the heating effect of the heating unit 20 after the SCR reactor 320 changes the kind of catalyst to detect the catalytic performance of the changed catalyst at different temperatures. By adopting the flue gas in the actual operation process and controlling the temperature of the flue gas entering the reaction unit 30, the performance detection of the catalyst can be carried out more comprehensively.
In order to further optimize the above technical solution, a first temperature measuring sensor 210 is disposed at an inlet of the heating unit 20 and is used for measuring a temperature of the flue gas before entering the heating unit 20, the heating unit 20 receives the temperature value measured by the first temperature measuring sensor 210, and compares the temperature value measured by the first temperature measuring sensor 210 with a preset temperature, and selects different heating modes to heat the flue gas, and in different modes, heating powers of the heating unit 20 are different, so that the heated flue gas temperatures are different.
In a specific embodiment of the above technical solution, the heating unit 20 includes three heating modes, namely a normal heating mode, a high efficiency heating mode and a high efficiency heating mode, the heating unit 20 selects different heating modes according to a difference value between a temperature value measured by the first temperature sensor 210 and a preset temperature, when the difference value between the temperature value measured by the first temperature sensor 210 and the preset temperature is 0 ℃ to 50 ℃, the flue gas temperature approaches the preset temperature, and the heating unit 20 selects the normal heating mode; when the difference between the temperature value measured by the first temperature sensor 210 and the preset temperature is 50-100 ℃, the heating unit 20 selects a high-efficiency heating mode; when the difference between the temperature value measured by the first temperature sensor 210 and the preset temperature is 100-150 ℃, the heating unit 20 selects a powerful heating mode, and the heating unit 20 is provided with multiple heating modes, so that the flue gas can be heated to the preset temperature after passing through the heating unit 20 for subsequent reaction.
Further, in the catalyst performance detection apparatus provided by the present invention, a second temperature measurement sensor 220 is disposed at an outlet of the heating unit 20, the second temperature measurement sensor 220 is used for detecting a temperature of the flue gas heated by the heating unit 20 to determine a temperature of the flue gas flowing out of the heating unit 20, and the second temperature measurement sensor 220 can feed back the heating unit 20 to perform adjustment of a heating mode, so that the temperature of the flue gas flowing out of the heating unit 20 reaches a preset temperature
It should be noted that, in the two embodiments provided by the present invention, the first temperature sensor 210 and the second temperature sensor 220 are respectively used to ensure that the temperature of the flue gas output from the heating unit 20 reaches the preset temperature, and in another embodiment of the present invention, the first temperature sensor 210 is disposed at the inlet of the heating unit 20, and the second temperature sensor 220 is disposed at the outlet of the heating unit 20, so as to verify the temperature of the flue gas at the outlet while the heating unit 20 heats the flue gas, and ensure that the temperature of the flue gas heated by the heating unit 20 reaches the preset temperature.
It should be further noted that in an embodiment of the present invention, the heating unit 20 includes an electric heater, and the electric heater converts electric energy into heat energy and heats the flue gas.
In addition, in the catalyst performance detection device provided by the invention, the temperature of the flue gas heated by the heating unit 20 is 150-300 ℃, namely in the performance detection experiment of the catalyst, the catalyst can be tested at any temperature within 150-300 ℃ by adjusting the heating mode of the heating unit 20, so that the experiment width is increased.
Further, in order to meet different capacity requirements in the experimental process and the stability of the experimental operation process, in the catalyst performance detection apparatus provided by the present invention, the SCR reactor 320 in the reaction unit 30 includes a first reaction zone and a second reaction zone, the first reaction zone and the second reaction zone may be connected in parallel or in series, and when the first reaction zone and the second reaction zone are connected in parallel, one of the reaction zones is a spare reaction zone; the SCR reactor 320 meets the maximum experimental capacity requirement when the first reaction zone and the second reaction zone are in series.
Further, the first reaction zone and the second reaction zone in the SCR reactor 320 may be set to have the same capacity, or may be set to have different capacities, in a specific embodiment of the present invention, the first reaction zone and the second reaction zone in the SCR reactor 320 have different capacities, where the first reaction zone is of a two-layer structure, the second reaction zone is of a single-layer structure, and the second reaction zone of the single-layer structure can meet the experimental capacity requirement of one unit, so that the SCR reactor 320 in this embodiment can meet any capacity requirement of three units or less, and the two reaction zones are independently started or stopped, so as to achieve the technical effect of saving energy.
In the performance detection experiment process of the catalyst, because the content of pollutants in the flue gas is complex, and a single type of flue gas analyzer can only measure the concentration of some types of pollutants, in another embodiment of the present invention, reserved holes are provided at both the first flue gas analyzer 110 and the second flue gas analyzer 410, and the reserved holes enable an operator to hold a specific flue gas measuring device to measure the concentration of a specific pollutant in the flue gas.
In addition, because the catalyst performance detection device provided by the invention uses the flue gas in the actual waste incineration line process to detect the performance of the catalyst, and compared with the simulated flue gas, the flue gas in the actual production process has extremely high dust content, so that the catalytic reaction effect of the catalyst is prevented from being influenced by the dust, and meanwhile, the mechanical abrasion and blockage of the downstream equipment caused by the dust are prevented.
The dust collector 60 may be a dry mechanical dust collector 60, or may be a bag type dust collector 60 or an electric dust collector 60, and here, the dust collector 60 is preferably a bag type dust collector 60.
Further, in the catalyst performance detection apparatus provided by the present invention, the ammonia spraying device 310 for spraying ammonia to the flue gas in the reaction unit 30 includes a liquid ammonia tank 3110 and a spray gun 3120, which are communicated, and the spray gun 3120 is disposed on the pipeline at the inlet of the SCR reactor 320 to spray ammonia to the flue gas in the pipeline.
Further, in a specific embodiment of the present invention, the flue gas inlet flow rate required by the experiment of the catalyst performance detection device is 1000Nm3/h, so the fan 50 is selected to be the fan 50 with the flow rate of 1000Nm3/h-1200Nm3/h, the pressure of 5500Pa-6000Pa and the power of 9kw-11 kw.
Because the catalyst performance detection device provided by the invention is tested in the actual production process, the volume of each device is larger, and the transportation and the disassembly and assembly of the devices are convenient to carry out, in the invention, the heating unit 20 and the reaction unit 30 both adopt a container type design, and the heating unit 20 and the reaction unit 30 are hermetically connected through a pipeline and a flange, so that the heating unit 20 and the reaction unit 30 can be separately produced and transported, and can be installed and used on the actual production site, so that the disassembly and the assembly and the use of the catalyst performance detection device with larger volume are reduced.
The dust collector 60, the fan 50, and other devices provided in the above embodiments are also designed in a container type and can be individually attached and detached for use.
In addition, the flue gas after the reaction in the SCR reactor 320 is discharged through the outlet duct 40, when the catalyst performance is good, the flue gas reaches the emission standard and can be directly discharged, and when the catalyst performance is poor, the flue gas needs to be subjected to subsequent treatment and then discharged with air, considering that there is an uncertain risk in the experimental process, therefore, in the catalyst performance detection apparatus provided by the present invention, the outlet duct 40 is communicated with the waste incineration line to discharge air after the flue gas is subjected to subsequent industrial treatment.
The terms "first" and "second," and the like in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (15)

1. A catalyst performance detection apparatus, characterized by comprising:
intake pipe (10), export flue after deacidification in intake pipe (10) intercommunication msw incineration line, be provided with first flue gas analyzer (110) in intake pipe (10), first flue gas analyzer (110) are used for detecting at least NO in the flue gas in intake pipe (10) X The initial concentration of (a);
the heating unit (20), the heating unit (20) is communicated with the air inlet pipe (10) so as to heat the flue gas introduced into the air inlet pipe (10) to a preset temperature;
the reaction unit (30) is arranged at the downstream of the heating unit (20), the reaction unit (30) comprises an ammonia spraying device (310) and an SCR reactor (320), and flue gas at a preset temperature enters the SCR reactor (320) after being sprayed with ammonia through the ammonia spraying device (310) so as to react under the catalytic action of a catalyst in the SCR reactor (320);
outlet duct (40) and fan (50), outlet duct (40) set up in reaction unit (30) low reaches, be provided with second flue gas analysis appearance (410) in outlet duct (40), second flue gas analysis appearance (410) are used for detecting NO in the flue gas after the SCR reaction at least X The fan (50) is used for driving the flue gas to enter from the gas inlet pipe (10) and to be discharged from the gas outlet pipe (40).
2. The catalyst performance detecting device according to claim 1, wherein a first temperature measuring sensor (210) is disposed at an inlet of the heating unit (20), the first temperature measuring sensor (210) is used for measuring a temperature of the flue gas entering the heating unit (20), and the heating unit (20) selects different heating modes according to a difference value between a temperature value measured by the first temperature measuring sensor (210) and the preset temperature, so as to heat the flue gas with different powers.
3. The catalyst performance detecting apparatus according to claim 2, wherein the heating unit (20) selects a normal heating mode when the difference between the temperature value measured by the first temperature measuring sensor (210) and the preset temperature is 0 ℃ to 50 ℃; when the difference is 50-100 ℃, the heating unit (20) selects a high-efficiency heating mode; when the difference is 100-150 ℃, the heating unit (20) selects a strong heating mode.
4. The catalyst performance detection device according to claim 1, wherein a second temperature sensor (220) is disposed at an outlet of the heating unit (20), and the second temperature sensor (220) is configured to detect a temperature of the flue gas heated by the heating unit (20) so as to determine a temperature of the flue gas entering the SCR reactor (320).
5. The catalyst performance detecting apparatus according to claim 1, wherein the SCR reactor (320) includes a first reaction zone and a second reaction zone, and the first reaction zone and the second reaction zone are connected in series or in parallel.
6. The catalyst performance detecting apparatus according to claim 5, wherein in the SCR reactor (320), the first reaction zone has a double-layer structure and the second reaction zone has a single-layer structure.
7. The catalyst performance detection device according to claim 1, wherein the inlet pipe (10) and the outlet pipe (40) are both provided with reserved holes, and the reserved holes are used for measuring the concentration of pollutants in flue gas by using a handheld flue gas measurement device.
8. The catalyst performance detection apparatus according to claim 1, further comprising a dust remover (60) provided between the intake pipe (10) and the heating unit (20).
9. The catalyst performance detecting apparatus according to claim 8, wherein the dust collector (60) is a bag collector (60).
10. The catalyst performance detecting apparatus according to claim 1, wherein the ammonia injection device (310) includes a liquid ammonia tank (3110) and a lance (3120) provided at an inlet of the SCR reactor (320) in communication.
11. The catalyst performance detecting apparatus according to claim 1, wherein the temperature of the flue gas heated by the heating unit (20) is 150 ℃ to 300 ℃.
12. The catalyst performance detecting apparatus according to claim 1, wherein the flow rate of the fan (50) is 1000Nm3/h to 1200Nm3/h, the pressure is 5500Pa to 6000Pa, and the power is 9kw to 11 kw.
13. The catalyst performance detecting apparatus according to claim 1, wherein the heating unit (20) includes an electric heater for heating flue gas.
14. The catalyst performance detecting apparatus according to claim 1, wherein the heating unit (20) and the reaction unit (30) are hermetically connected by a flange.
15. The catalyst performance detecting device according to any one of claims 1 to 14, wherein the gas outlet pipe (40) is communicated with a waste incineration line to perform industrial treatment on the flue gas.
CN202210644835.5A 2022-06-09 2022-06-09 Catalyst performance detection device Pending CN114894954A (en)

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