CN114778259A - Gas detection device and detection method for recovered tail gas of rotary furnace - Google Patents
Gas detection device and detection method for recovered tail gas of rotary furnace Download PDFInfo
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- CN114778259A CN114778259A CN202210354002.5A CN202210354002A CN114778259A CN 114778259 A CN114778259 A CN 114778259A CN 202210354002 A CN202210354002 A CN 202210354002A CN 114778259 A CN114778259 A CN 114778259A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/405—Concentrating samples by adsorption or absorption
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N21/643—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" non-biological material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2257/00—Components to be removed
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Abstract
The invention relates to the technical field of tail gas detection, and discloses a gas detection device after tail gas recovery of a rotary furnace, which comprises the rotary furnace, wherein a waste gas treatment structure is connected onto the rotary furnace through a gas guide pipe, one end of the waste gas treatment structure is also connected with a reaction chamber, a detector is connected onto the reaction chamber, one end of the reaction chamber is communicated with an ozone generation structure through the gas guide pipe, and one end of the ozone generation structure is connected with a fan, greatly improving the cooling effect on the gas.
Description
Technical Field
The invention relates to the technical field of tail gas detection, in particular to a gas detection device and a detection method for a recovered tail gas of a rotary furnace.
Background
The rotary kiln is a thermal equipment for calcining, roasting or drying granular and powdery materials, and is mainly applied to primary rough processing of powder or mineral materials, such as the calcining and the calcining of cement clinker, waste gas is generated in the calcining process, the waste gas mainly contains nitrogen oxides, especially the content proportion of NO is very high, the NO can cause serious harm to the environment if the NO is discharged without being processed and detected to reach the qualified standard, one mode for detecting the nitrogen oxides in the prior art is to generate fluorescence through the reaction of the NO and ozone, and then the concentration of the gas in the NO is calculated through the fluorescence intensity, but the prior device has some problems in the using process:
the existing waste gas is not separated and removed from the effective internal impurities in the process of discharging from the rotary furnace, so that a large amount of calcining residues can be brought into the waste gas during the subsequent reaction in a reaction chamber, the residues in the reaction chamber can be accumulated more and more, the reaction chamber can be continuously and normally used, the temperature of the gas directly discharged from the rotary furnace is very high, the transmission pipeline and the middle equipment can be in a high-temperature state for a long time without effective cooling and re-transmission, the loss speed of the equipment is increased, and the service life of the equipment is shortened.
When air is subjected to corona discharge, air is directly introduced into the air to generate ozone, water in the air also reacts when ionized, and impurities can be generated in the reaction process to influence the accuracy of the detection result of the nitrogen oxide gas in the air.
Therefore, a gas detection device and a detection method thereof after the tail gas of the rotary furnace is recovered are provided.
Disclosure of Invention
The invention provides a gas detection device and a gas detection method after recovery of tail gas of a rotary furnace, which have the advantages of accurate detection result and long service life of equipment and solve the problems in the background technology.
The invention provides the following technical scheme: a gas detection device after tail gas recovery of a rotary furnace comprises the rotary furnace, wherein a waste gas treatment structure is connected to the rotary furnace through a gas guide pipe, one end of the waste gas treatment structure is also connected with a reaction chamber, a detector is connected to the reaction chamber, one end of the reaction chamber is communicated with an ozone generation structure through the gas guide pipe, and one end of the ozone generation structure is connected with a fan;
the waste gas treatment structure comprises a cooling impurity removal structure, a secondary impurity removal structure and a tertiary impurity removal structure, the cooling impurity removal structure is connected with the rotary furnace, the other end of the cooling impurity removal structure is connected with the secondary impurity removal structure, and the other end of the secondary impurity removal structure is connected with the tertiary impurity removal structure;
the ozone generating structure comprises a drying structure and an ozone generator, the drying structure is connected with an air outlet pipe of the fan, and the other end of the drying structure is in conduction connection with the ozone generator.
Preferably, install the detachable spiral pipe in the cooling edulcoration structure, and the both ends of spiral pipe communicate with the inlet end of rotary furnace and second grade edulcoration structure respectively, the cooling edulcoration structure is located the outside parcel of spiral pipe and is provided with the shell, and packs in this shell and have the coolant liquid, this coolant liquid intercommunication and outside cooling cycle structure.
Preferably, a plurality of baffles are arranged in the secondary impurity removing structure, and the baffles form a return-type flow channel in the secondary impurity removing structure.
Preferably, a partition plate which inclines towards the air inlet end is arranged in the three-stage impurity removing structure, and a guide plate which forms an included angle with the vertical direction smaller than five degrees and rotates along the clockwise direction is uniformly arranged on the lower surface of the partition plate.
Preferably, the drying structure is filled with a drying agent, and the inside of the drying structure is also provided with a return type airflow channel through a partition plate.
The method for detecting the gas after the tail gas recovery of the rotary furnace comprises a tail gas treatment step and an ozone generation step, wherein the tail gas treatment step and the ozone generation step are carried out simultaneously in the detection process, the tail gas treatment step and the ozone generation step enter a reaction chamber for reaction after the tail gas treatment step and the ozone generation step are finished, and then the gas concentration is detected and judged through a detector, wherein:
and (3) tail gas treatment:
s1, carrying out primary impurity separation on the tail gas discharged by the rotary furnace;
s2, cooling and removing impurities from the tail gas discharged by the rotary furnace;
s3, removing impurities from the tail gas discharged by the rotary furnace;
an ozone generating step:
s1, absorbing and separating moisture in the air;
and S2, carrying out corona treatment on the oxygen in the treated air to generate ozone.
The invention has the following beneficial effects:
1. the cooling impurity removal structure is arranged at the air outlet end of the rotary furnace, waste gas can rapidly rotate in the spiral pipe through the cooling impurity removal structure, on one hand, large granular impurities contained in the waste gas can be subjected to rotating centrifugal separation, meanwhile, the contact area between the gas and the internal cooling liquid in the process of flowing through the spiral pipe can be increased by means of the circulated cooling liquid filled in the cooling impurity removal structure, the cooling effect on the gas is greatly improved, the spiral pipe in the cooling impurity removal structure is also arranged into a detachable structure, so that the gas can be cleaned and reused subsequently, then the gas is subjected to back-turning type flowing through the secondary impurity removal structure, the separation effect on the granular impurities in the gas is further increased, and finally, the gas is decelerated through the secondary impurity removal structure and can impact the internal permeable plate to carry out final separation, the separation effect of particle impurities in the waste gas is ensured.
2. This application is provided with ozone generation structure through the blast pipe tip at the fan, wherein the blast pipe communicates with drying structure earlier, and gas carries out abundant contact drying with the drier wherein through the flow of the formula of turning back, has guaranteed the abundant absorption of steam in the air like this, and the air of detaching moisture carries out the ionization in entering into ozone generator and produces ozone, then lets in and reacts in the reacting chamber to detect and then reach the measuring result of concentration through the detector.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the flow structure of the present invention.
In the figure: 1. a rotary kiln; 2. an exhaust gas treatment structure; 3. an ozone generating structure; 4. a fan; 5. a reaction chamber; 6. a detector; 7. cooling and impurity removing structures; 8. a secondary impurity removal structure; 9. a three-stage impurity removal structure; 10. drying the structure; 11. an ozone generator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1-2, a gas detection device after recovery of tail gas of a rotary furnace comprises a rotary furnace 1, wherein the rotary furnace 1 is connected with a waste gas treatment structure 2 through a gas guide tube, one end of the waste gas treatment structure 2 is also connected with a reaction chamber 5, the reaction chamber 5 is connected with a detector 6, one end of the reaction chamber 5 is communicated with an ozone generation structure 3 through a gas guide tube, and one end of the ozone generation structure 3 is connected with a fan 4;
the waste gas treatment structure 2 comprises a cooling impurity removal structure 7, a secondary impurity removal structure 8 and a tertiary impurity removal structure 9, the cooling impurity removal structure 7 is connected with the rotary furnace 1, the other end of the cooling impurity removal structure 7 is connected with the secondary impurity removal structure 8, and the other end of the secondary impurity removal structure 8 is connected with the tertiary impurity removal structure 9;
the ozone generating structure 3 comprises a drying structure 10 and an ozone generator 11, wherein the drying structure 10 is connected with an air outlet pipe of the fan 4, and the other end of the drying structure 10 is connected with the ozone generator 11 in a conducting manner.
Wherein, install the detachable spiral pipe in the cooling edulcoration structure 7, and the both ends of spiral pipe communicate with rotary furnace 1 and second grade edulcoration structure 8's inlet end respectively, cooling edulcoration structure 7 is located the outside parcel of spiral pipe and is provided with the shell, and it has the coolant liquid to fill in this shell, this coolant liquid intercommunication and outside cooling cycle structure, can make from rotary furnace 1 in the combustion gas carry out the spiral rotation in the spiral pipe like this, make impurity in the waste gas by the help of the structure of spiral on the one hand under the centrifugal force effect that rotatory in-process produced by the separation stay in the pipe, on the other hand also through the structure greatly increased waste gas of spiral when wherein flow with the area of contact of coolant liquid, and then greatly increased waste gas is at the cooling effect wherein, guarantee the normal use of follow-up structure.
Wherein, second grade edulcoration structure 8 is inside to be provided with a plurality of baffles, and a plurality of baffles form the flow channel of the formula of turning back in second grade edulcoration structure 8 is inside, the air current can flow along the inside formula flow channel of turning back when entering into second grade edulcoration structure 8 like this, because the quality of foreign particles is big when the tip that turns back at gas, it can be separated, like this gas after in second grade edulcoration structure 8 has carried out the separation of particle impurity again, the content of exhaust gas particle impurity has further been reduced, just also guaranteed in the follow-up detector 6 can not have a large amount of particle impurity pile up and influence its continuation and use.
Wherein, be provided with the baffle towards the air inlet end direction slope in tertiary edulcoration structure 9, and evenly be provided with on the lower surface of this baffle and be less than five degrees and be along the rotatory baffle of clockwise with vertical direction contained angle, can make the air current after entering into tertiary edulcoration structure 9 with the help of the sudden expansion of tertiary edulcoration structure 9 inner chamber and greatly reduced velocity of flow like this, be favorable to inside large granule impurity to separate from the air current once more like this, still impact with the help of the baffle to horizontal air current and turn to upwards flowing simultaneously, just so further improved the separation effect to the impurity in the air current.
The drying structure 10 is filled with a drying agent, and the inside of the drying structure is also set to be a return type airflow channel through a partition plate, so that the length of a flow path of external air after entering the drying structure is increased, the sufficiency of absorption of water vapor in the drying structure is further increased, the ozone generator 11 can subsequently generate ozone with purer and higher concentration, and the detection accuracy of a reaction result in the detector 6 is improved.
This gaseous detection method after rotary furnace tail gas recovery contains tail gas treatment step and ozone generation step, and both go on simultaneously in the testing process, and both enter into the reacting chamber 5 after accomplishing and react, then detect through detector 6 and judge gas concentration, wherein:
a tail gas treatment step:
s1, carrying out primary impurity separation on tail gas discharged by the rotary furnace;
s2, cooling and removing impurities from the tail gas discharged by the rotary furnace;
s3, removing impurities from the tail gas discharged by the rotary furnace;
an ozone generating step:
s1, absorbing and separating moisture in the air;
and S2, carrying out corona treatment on the oxygen in the treated air to generate ozone.
The working principle is that waste gas generated in the production process of the rotary furnace 1 is conveyed into the cooling impurity removing structure 7 through a pipeline, the waste gas enters the spiral pipe in the cooling impurity removing structure 7 to rotationally flow, particle impurities in the waste gas are separated through a rotational centrifugal force, meanwhile, a cooling circulation structure outside the cooling impurity removing structure 7 can continuously circulate cooling liquid inside the cooling impurity removing structure 7, so that the flow of air flow in the spiral pipe can be fully and fully cooled, then the gas enters the second-stage impurity removing structure 8, the waste gas is continuously turned to flow under the design of an internal turn-back type air flow channel, the impurity particles in the waste gas are separated and removed again, then the waste gas enters the third-stage impurity removing structure 9, the speed of the waste gas suddenly drops due to the increase of the space at the moment of entering, and the impurity particles in the waste gas can be separated out, then the inclined plate arranged obliquely isolates particle impurities, airflow finally flows into the reaction chamber 5 from the left part of the three-stage impurity removal structure 9, the ozone generation structure 3 is started to work synchronously while the waste gas treatment structure 2 acts, so that the fan 4 can input external air into the drying structure 10, the air separates moisture in the air under the adsorption action of an internal drying agent, then the air is ionized by the ozone generator 11 to generate ozone, finally the air enters the reaction chamber 5 to react with NO in waste gas, and then the detector 6 detects the reaction result.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a gaseous detection device after rotary furnace tail gas recovery, includes rotary furnace (1), its characterized in that: the rotary furnace (1) is connected with a waste gas treatment structure (2) through an air duct, one end of the waste gas treatment structure (2) is also connected with a reaction chamber (5), the reaction chamber (5) is connected with a detector (6), one end of the reaction chamber (5) is communicated with an ozone generation structure (3) through an air duct, and one end of the ozone generation structure (3) is connected with a fan (4);
the waste gas treatment structure (2) comprises a cooling impurity removal structure (7), a secondary impurity removal structure (8) and a tertiary impurity removal structure (9), the cooling impurity removal structure (7) is connected with the rotary furnace (1), the other end of the cooling impurity removal structure (7) is connected with the secondary impurity removal structure (8), and the other end of the secondary impurity removal structure (8) is connected with the tertiary impurity removal structure (9);
the ozone generating structure (3) comprises a drying structure (10) and an ozone generator (11), wherein the drying structure (10) is connected with an air outlet pipe of the fan (4), and the other end of the drying structure (10) is in conduction connection with the ozone generator (11).
2. The apparatus according to claim 1, wherein the apparatus comprises: install the detachable spiral pipe in cooling edulcoration structure (7), and the both ends of spiral pipe communicate with the inlet end of rotary furnace (1) and second grade edulcoration structure (8) respectively, cooling edulcoration structure (7) are located the outside parcel of spiral pipe and are provided with the shell, and pack in this shell and have coolant liquid, this coolant liquid intercommunication and outside cooling cycle structure.
3. The apparatus according to claim 1, wherein the apparatus comprises: a plurality of baffles are arranged inside the secondary impurity removing structure (8), and the baffles form a return type flow channel inside the secondary impurity removing structure (8).
4. The apparatus according to claim 1, wherein the apparatus comprises: be provided with the baffle towards the slope of inlet end direction in tertiary edulcoration structure (9), and evenly be provided with on the lower surface of this baffle and vertical direction contained angle be less than five degrees and be along the rotatory baffle of clockwise.
5. The apparatus according to claim 1, wherein the apparatus comprises: the drying structure (10) is filled with a drying agent, and the inside of the drying structure is also provided with a back-turning type airflow channel through a partition plate.
6. The method for detecting the gas after the recovery of the tail gas of the rotary kiln according to any one of claims 1 to 5, wherein: the method comprises a tail gas treatment step and an ozone generation step, wherein the tail gas treatment step and the ozone generation step are carried out simultaneously in the detection process, and the tail gas treatment step and the ozone generation step enter a reaction chamber (5) to react after the detection process is finished, and then the gas concentration is detected and judged through a detector (6), wherein:
and (3) tail gas treatment:
s1, carrying out primary impurity separation on tail gas discharged by the rotary furnace;
s2, cooling and removing impurities from the tail gas discharged by the rotary furnace;
s3, removing impurities from the tail gas discharged by the rotary furnace;
an ozone generating step:
s1, absorbing and separating moisture in the air;
and S2, carrying out corona treatment on the oxygen in the treated air to generate ozone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210354002.5A CN114778259A (en) | 2022-04-06 | 2022-04-06 | Gas detection device and detection method for recovered tail gas of rotary furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210354002.5A CN114778259A (en) | 2022-04-06 | 2022-04-06 | Gas detection device and detection method for recovered tail gas of rotary furnace |
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| CN114778259A true CN114778259A (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210354002.5A Pending CN114778259A (en) | 2022-04-06 | 2022-04-06 | Gas detection device and detection method for recovered tail gas of rotary furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116726639A (en) * | 2023-08-11 | 2023-09-12 | 佛山市天禄智能装备科技有限公司 | Waste gas treatment method and treatment device based on high-temperature rotary furnace |
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2022
- 2022-04-06 CN CN202210354002.5A patent/CN114778259A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116726639A (en) * | 2023-08-11 | 2023-09-12 | 佛山市天禄智能装备科技有限公司 | Waste gas treatment method and treatment device based on high-temperature rotary furnace |
| CN116726639B (en) * | 2023-08-11 | 2023-11-07 | 佛山市天禄智能装备科技有限公司 | Waste gas treatment method and treatment device based on high-temperature rotary furnace |
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