CN113866060A - Method for testing concentration of necking dust in smoke chamber - Google Patents
Method for testing concentration of necking dust in smoke chamber Download PDFInfo
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- CN113866060A CN113866060A CN202111171145.4A CN202111171145A CN113866060A CN 113866060 A CN113866060 A CN 113866060A CN 202111171145 A CN202111171145 A CN 202111171145A CN 113866060 A CN113866060 A CN 113866060A
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- 239000000779 smoke Substances 0.000 title claims abstract description 97
- 239000000428 dust Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000005070 sampling Methods 0.000 claims abstract description 98
- 239000007789 gas Substances 0.000 claims abstract description 72
- 239000003245 coal Substances 0.000 claims abstract description 20
- 239000002912 waste gas Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000010453 quartz Substances 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000009423 ventilation Methods 0.000 claims abstract description 5
- 239000013618 particulate matter Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 7
- 230000000391 smoking effect Effects 0.000 claims description 7
- 239000003365 glass fiber Substances 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000000354 decomposition reaction Methods 0.000 abstract description 6
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003189 isokinetic effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
- G01N15/0618—Investigating concentration of particle suspensions by collecting particles on a support of the filter type
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N2001/225—Sampling from a flowing stream of gas isokinetic, same flow rate for sample and bulk gas
Abstract
The invention discloses a method for testing the concentration of necking dust in a smoke chamber, which comprises the following steps: step one, measuring the wind speed of gas passing through a throat of a smoke chamber; selecting a proper sampling head according to the wind speed; collecting the particulate matters in the gas, determining the mass of the particulate matters, and then dividing the mass of the particulate matters by the amount of the waste gas in the collected gas to obtain the dust concentration of the gas passing through the throat of the smoke chamber; the wind speed of the necking gas of the smoke chamber is the wind quantity of the necking of the smoke chamber divided by the diameter size of the necking of the smoke chamber, and the wind speed of the necking gas passing through the smoke chamber can be obtained; the air volume Vsuo of the smoke chamber necking = Vrt + Vair + Vco2+ Vlok, wherein Vsuo is the ventilation volume of the smoke chamber necking, Vrt is the theoretical smoke volume generated by combustion of pulverized coal at the kiln head, Vair is the excess air of combustion in the kiln, Vco2 is the volume of CO2 generated by decomposition of raw materials in the kiln, and Vlok is the air leakage volume of the smoke chamber; the sampling head is made of high-temperature-resistant quartz materials. The invention has the advantage of providing convenience for production debugging and optimization.
Description
Technical Field
The invention relates to the field of cement clinker sintering, in particular to a method for testing the concentration of necking dust in a smoke chamber.
Background
The existing dust concentration testing method is the measurement of gas dust concentration provided in GB-T26282-2010 heat balance measurement method for cement rotary kilns, and the method is characterized in that a smoke dust sampling pipe is inserted into a pipeline from a sampling hole, a sampling nozzle is arranged on a measuring point and is opposite to gas flow, a certain amount of dust-containing gas is extracted according to the constant-speed sampling principle of particulate matters, namely the air extraction speed of the sampling nozzle is equal to the gas flow speed at the measuring point, and the gas dust concentration of the gas is calculated according to the particulate matter amount collected in a filter cylinder of the sampling pipe and the extracted gas amount.
The existing test method mainly measures the dust concentration of the outlet gas of the preheater, the inlet gas and the outlet gas of the humidifying tower, the inlet gas and the outlet gas of the dust collector, the chimney of the grate cooler and the primary air (when the air is discharged by adopting a coal mill). The main reason that the existing method cannot meet the requirement of the concentration test of the dust at the throat of the smoke chamber is limited by the material of the sampler, the general measurement temperature of the method is required to be below 350 ℃, the actual temperature of the throat of the smoke chamber is often above 1000 ℃, and the method cannot meet the measurement requirement of the concentration of the dust at the throat of the smoke chamber.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for testing the concentration of necking dust in a smoke chamber, thereby solving the defects.
The purpose of the invention is realized by the following technical scheme:
a method for testing the concentration of necking dust in a smoke chamber comprises the following steps:
step one, measuring the wind speed of gas passing through a throat of a smoke chamber;
selecting a proper sampling head according to the wind speed;
and step three, collecting the particulate matters in the gas, determining the mass of the particulate matters, and then dividing the mass of the particulate matters by the amount of the waste gas in the collected gas to obtain the dust concentration of the gas passing through the throat of the smoke chamber.
Furthermore, the wind speed of the gas passing through the throat of the smoke chamber can be obtained by dividing the wind quantity of the throat of the smoke chamber by the diameter of the throat of the smoke chamber.
Furthermore, the air volume Vsuo of the smoke chamber throat = Vrt + Vair + Vco2+ Vlok, wherein Vsuo is the ventilation volume of the smoke chamber throat, Vrt is the theoretical flue gas volume generated by combustion of kiln head pulverized coal, Vair is excess air for combustion in the kiln, Vco2 is the CO2 volume generated by decomposition of raw materials in the kiln, and Vlok is the air leakage volume of the smoke chamber.
Furthermore, the sampling head is made of high-temperature-resistant quartz materials.
Further, the specific process for measuring the dust concentration in the third step comprises: connecting a sampling head with a dust concentration detector, checking the air tightness, then starting to extract the necking gas of the smoke chamber, and then sampling by a mobile sampling method, wherein the mobile sampling method is that the sampling head is adjusted at the necking position to insert different depths into the same sampling position for sampling, so that a plurality of groups of gases are extracted, and the collection time of each group of gases is consistent; and finally, calculating the average dust concentration of the sampling points according to the mass of the particles and the total extracted air volume.
Furthermore, a plurality of sampling positions are selected at the necking position of the smoke chamber to extract gas according to a mobile sampling method, and then the average dust concentration of the sampling plane is measured.
Further, the particulate matter is collected by a particulate matter isokinetic sampling principle, the particulate matter is collected in gas by filtering through a glass fiber filter cartridge, and the mass of the particulate matter is determined by weighing the mass difference of the filter cartridge before and after sampling.
The invention has the beneficial effects that:
1. the method for testing the concentration of the necking dust of the smoke chamber can overcome the influence of high temperature, and test the concentration of the dust of the kiln tail smoke gas at the temperature of more than 1000 ℃ so as to provide convenience for production debugging and optimization;
2. the amount of dust passing through the throat of the smoke chamber in each hour in the production process can be obtained by combining the calculation of the amount of waste gas passing through the throat of the smoke chamber, and effective data support is provided for production line production improvement and resistance reduction.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the first embodiment, as shown in fig. 1, a method for testing the concentration of dust in a throat of a smoke chamber includes the following steps:
step one, measuring the wind speed of gas passing through a throat of a smoke chamber;
selecting a proper sampling head according to the wind speed;
and step three, collecting the particulate matters in the gas, determining the mass of the particulate matters, and then dividing the mass of the particulate matters by the amount of the waste gas in the collected gas to obtain the dust concentration of the gas passing through the throat of the smoke chamber.
The invention is further configured to: the wind speed of the gas passing through the throat of the smoke chamber can be obtained by dividing the wind quantity of the throat of the smoke chamber by the diameter of the throat of the smoke chamber.
The invention is further configured to: the air quantity Vsuo of the smoke chamber necking = Vrt + Vair + Vco2+ Vlok.
In this embodiment: the air quantity through the necking of the smoke chamber is equal to the waste gas generated by the combustion of the pulverized coal at the kiln head, the excess air generated by the combustion in the kiln, the CO2 generated by the further decomposition of the raw materials and the air leakage of the smoke chamber, wherein:
vsuo-ventilation of the smoking room throat;
vrt-the theoretical amount of flue gas generated by combustion of kiln head pulverized coal;
vair-combustion of excess air in the kiln;
vco 2-decomposition of raw materials in the kiln to produce CO2 amount;
vlok is the air leakage rate of the smoke chamber;
the theoretical smoke generated by burning the pulverized coal discharged from the kiln head is about 0.3427 Nm3/kg.cl, and +/-10% fluctuation data are in a production range;
the excess air quantity of the pulverized coal combustion in the Vair kiln is 0.0250 Nm3/kg.cl, and +/-5% fluctuation is available data;
decomposing the raw materials in the Vco2 kiln to generate CO2 with the amount of 0.0187 Nm3/kg. cl, and fixing the data in actual production;
the air leakage rate of the Vlok smoke chamber is 0.0313 Nm3/kg. cl, the difference of different sealing fields is large, and the data of the fluctuation range +/-15% are reasonable.
When the dust concentration in the exhaust gas is tested, prediction is performed before the test to determine the speed range in the pipeline to be tested.
The invention is further configured to: the sampling head is made of high-temperature-resistant quartz materials, and the diameter of the sampling head is 4.5 mm.
The invention is further configured to: connecting a sampling head with a dust concentration detector, checking the air tightness, then starting to extract the necking gas of the smoke chamber, and then sampling by a mobile sampling method, wherein the mobile sampling method is that the sampling head is adjusted at the necking position to insert different depths into the same sampling position for sampling, so that a plurality of groups of gases are extracted, and the collection time of each group of gases is consistent; and finally, calculating the average dust concentration of the sampling points according to the mass of the particles and the total extracted air volume.
In this embodiment, sampling is performed by adjusting the sampling head to insert different depths into the same sampling position, so as to extract eight groups of gases.
The invention is further configured to: and selecting a plurality of sampling positions at the necking position of the smoke chamber to extract gas according to a mobile sampling method, and then measuring the average dust concentration of the sampling plane.
In this embodiment, the throat of the smoke chamber is equally divided into a plurality of horizontal areas, and four sampling positions are selected in the same horizontal area.
The invention is further configured to: the particulate matter is collected by a particulate matter constant-speed sampling principle, the particulate matter in the collected gas is filtered by using a glass fiber filter cylinder, and the mass of the particulate matter is determined by weighing the mass difference of the filter cylinder before and after sampling.
In this embodiment: when testing dust concentration in the waste gas, adopt the negative pressure extraction principle, with the interior waste gas extraction of pipeline measurement extraction amount of wind simultaneously, and the sampling is strained a section of thick bamboo and is used glass fiber preparation, and its space is less than test environment particle size, adopts filterable principle to realize the laying-up of particulate matter to weigh the measurement.
The second embodiment is a method for testing the concentration of necking dust in a smoke chamber, which comprises the following steps:
step one, measuring the wind speed of gas passing through a throat of a smoke chamber;
selecting a proper sampling head according to the wind speed;
and step three, collecting the particulate matters in the gas, determining the mass of the particulate matters, and then dividing the mass of the particulate matters by the amount of the waste gas in the collected gas to obtain the dust concentration of the gas passing through the throat of the smoke chamber.
The invention is further configured to: the wind speed of the gas passing through the throat of the smoke chamber can be obtained by dividing the wind quantity of the throat of the smoke chamber by the diameter of the throat of the smoke chamber.
The invention is further configured to: the air quantity Vsuo of the smoke chamber necking = Vrt + Vair + Vco2+ Vlok.
In this embodiment: the air quantity through the necking of the smoke chamber is equal to the waste gas generated by the combustion of the pulverized coal at the kiln head, the excess air generated by the combustion in the kiln, the CO2 generated by the further decomposition of the raw materials and the air leakage of the smoke chamber, wherein:
vsuo-ventilation of the smoking room throat;
vrt-the theoretical amount of flue gas generated by combustion of kiln head pulverized coal;
vair-combustion of excess air in the kiln;
vco 2-decomposition of raw materials in the kiln to produce CO2 amount;
vlok is the air leakage rate of the smoke chamber;
the theoretical smoke generated by burning the pulverized coal discharged from the kiln head is about 0.3427 Nm3/kg.cl, and +/-10% fluctuation data are in a production range;
the excess air quantity of the pulverized coal combustion in the Vair kiln is 0.0250 Nm3/kg.cl, and +/-5% fluctuation is available data;
decomposing the raw materials in the Vco2 kiln to generate CO2 with the amount of 0.0187 Nm3/kg. cl, and fixing the data in actual production;
the air leakage rate of the Vlok smoke chamber is 0.0313 Nm3/kg. cl, the difference of different sealing fields is large, and the data of the fluctuation range +/-15% are reasonable.
When the dust concentration in the exhaust gas is tested, prediction is performed before the test to determine the speed range in the pipeline to be tested.
The invention is further configured to: the sampling head is made of high-temperature-resistant quartz materials, and the diameter of the sampling head is 6.0 mm.
The invention is further configured to: connecting a sampling head with a dust concentration detector, checking the air tightness, then starting to extract the necking gas of the smoke chamber, and then sampling by a mobile sampling method, wherein the mobile sampling method is that the sampling head is adjusted at the necking position to insert different depths into the same sampling position for sampling, so that a plurality of groups of gases are extracted, and the collection time of each group of gases is consistent; and finally, calculating the average dust concentration of the sampling points according to the mass of the particles and the total extracted air volume.
In this embodiment, ten groups of gases are extracted by adjusting the sampling head to insert into the same sampling position at different depths for sampling.
The invention is further configured to: and selecting a plurality of sampling positions at the necking part of the smoke chamber to extract gas according to a mobile sampling method, and then measuring and calculating the average dust concentration of the sampling plane.
In this embodiment, the throat of the smoke chamber is equally divided into a plurality of horizontal areas, and six sampling positions are selected in the same horizontal area.
The invention is further configured to: the particulate matter is collected by a particulate matter constant-speed sampling principle, the particulate matter in the collected gas is filtered by using a glass fiber filter cylinder, and the mass of the particulate matter is determined by weighing the mass difference of the filter cylinder before and after sampling.
In this embodiment: when testing dust concentration in the waste gas, adopt the negative pressure extraction principle, with the interior waste gas extraction of pipeline measurement extraction amount of wind simultaneously, and the sampling is strained a section of thick bamboo and is used glass fiber preparation, and its space is less than test environment particle size, adopts filterable principle to realize the laying-up of particulate matter to weigh the measurement.
The third embodiment is different from the first and second embodiments in that: the sampling head is made of high-temperature-resistant quartz materials, and the diameter of the sampling head is 8.0 mm.
Example four, take 5000 tpd production line as an example, normal production clinker yield is 6000 t/d, standard coal consumption is 102 kgce/t.cl, head-to-tail coal ratio is 4:6, smoke chamber throat is 2.55 x 2.55 standard square throat. According to design experience, the excess air coefficient in the kiln is 1.08%, the smoke chamber necking is 1.18%, namely the oxygen concentration of the pulverized coal in the kiln is 1.30% after the pulverized coal is completely combusted, and the smoke chamber necking oxygen concentration is 2.70%;
note: kgce/t.cl is unit clinker standard coal consumption unit, Nm3/kg.cl is unit clinker standard condition air quantity unit.
Firstly, calculating the theoretical wind speed through a necking down of a smoke chamber;
1. calculating the theoretical flue gas generated by coal combustion to obtain the theoretical flue gas generated by the combustion of the pulverized coal at the kiln head of about 0.3427 Nm3/kg.cl (wet air);
2. decomposing the raw materials in the kiln to generate CO2 with the amount of 0.0187 Nm3/kg. cl;
3. the excess air quantity of the coal powder in the kiln is 0.0250 Nm 3/kg.cl;
4. the air leakage rate of the smoke chamber is 0.0313 Nm3/kg. cl;
5. in conclusion, the amount of the necking gas of the smoke chamber is 0.4177 Nm3/kg. cl, 21.91 m/s can be obtained by calculation according to the output of clinker and the size of the necking diameter of the smoke chamber, the temperature of a set working condition is 1030 ℃, and the pressure is-500 Pa.
Secondly, sampling and calculating dust through a necking of a smoke chamber;
1. the method comprises the following steps of calculating by using a smoke chamber necking wind speed of 21.91 m/s, selecting a sampling head with the diameter of 4.5mm, and according to the constant-speed sampling principle of particulate matters, measuring the sampling and extracting gas speed to be 20.91L/min, wherein the total extracting time is X min (8 min is set in the time, and the extracting time can be adjusted according to the actual situation), wherein the extracting speed of a sampling nozzle is equal to the air speed at a measuring point, so that the testing requirement is met;
2. after the dust concentration detector is connected and the airtightness is checked, the exhaust of the necking gas of the smoke chamber is started, according to the requirements of GB/T16157 and 1996, the insertion depth of the customized high-temperature-resistant quartz tube is adjusted by adopting a mobile sampling method, the air volume of 8 different depths is extracted at the sampling point of the necking position, each depth is sampled for 1min (set according to the actual condition), the total extracted air volume is 167.26L, and finally the average dust concentration of the sampling point is calculated according to the mass of the particles and the total extracted air volume;
3. according to the same operation method, respectively extracting gas at different four sampling points in the same horizontal area of the necking of the smoke chamber according to the previous step, and measuring and calculating the average dust concentration of the sampling surface;
4. the amount of dust passing through the throat of the smoke chamber in each hour can be measured by combining the amount of waste gas passing through the throat of the smoke chamber calculated theoretically, and data guidance is provided for production.
The principle of the invention is as follows:
according to the diameter size and the air quantity of the throat of the smoke chamber, the air speed of the throat of the smoke chamber is theoretically calculated, a proper high-temperature-resistant quartz sampling pipe and a sampling head are selected according to the particulate matter constant-speed sampling principle, the sampling head is in threaded connection with a conventional smoke sampling pipe of a gas analyzer, the dust-containing gas of the throat of the smoke chamber is extracted in a constant-flow mode, the dust-containing concentration of the gas passing through the throat of the smoke chamber is calculated according to the amount of particulate matters collected in a filter cylinder of the sampling pipe and the amount of the extracted gas, and the dust-containing amount of the throat of the smoke chamber can be known by combining the amount of the gas passing through the throat of the smoke chamber measured in theory.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, or orientations or positional relationships that the products of the present invention are usually placed in when used, or orientations or positional relationships that are usually understood by those skilled in the art, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or the elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Claims (7)
1. A method for testing the concentration of necking dust in a smoke chamber is characterized by comprising the following steps:
step one, measuring the wind speed of gas passing through a throat of a smoke chamber;
selecting a proper sampling head according to the wind speed;
and step three, collecting the particulate matters in the gas, determining the mass of the particulate matters, and then dividing the mass of the particulate matters by the amount of the waste gas in the collected gas to obtain the dust concentration of the gas passing through the throat of the smoke chamber.
2. The method for testing the concentration of the necking dust of the smoking room according to claim 1, wherein the method comprises the following steps: the wind speed of the gas passing through the throat of the smoke chamber can be obtained by dividing the wind quantity of the throat of the smoke chamber by the diameter of the throat of the smoke chamber.
3. The method for testing the concentration of the dust in the throat of the smoke chamber as claimed in claim 2, wherein the air volume Vsuo of the throat of the smoke chamber = Vrt + Vair + Vco2+ Vlok, wherein Vsuo is the ventilation volume of the throat of the smoke chamber, Vrt is the theoretical smoke volume generated by burning of pulverized coal at the kiln head, Vair is the excess air burned in the kiln, Vco2 is the volume of CO2 generated by decomposing raw materials in the kiln, and Vlok is the air leakage volume of the smoke chamber.
4. The method for testing the concentration of the necking dust of the smoking room according to claim 1, wherein the method comprises the following steps: the sampling head is made of high-temperature-resistant quartz materials.
5. The method for testing the concentration of the necking dust of the smoking room according to claim 1, wherein the specific process of measuring the concentration of the dust in the third step comprises the following steps: connecting a sampling head with a dust concentration detector, checking the air tightness, then starting to extract the necking gas of the smoke chamber, and then sampling by a mobile sampling method, wherein the mobile sampling method is that the sampling head is adjusted at the necking position to insert different depths into the same sampling position for sampling, so that a plurality of groups of gases are extracted, and the collection time of each group of gases is consistent; and finally, calculating the average dust concentration of the sampling points according to the mass of the particles and the total extracted air volume.
6. The method for testing the concentration of the necking dust of the smoking room according to claim 5, wherein the method comprises the following steps: and selecting a plurality of sampling positions at the necking part of the smoke chamber to extract gas according to a mobile sampling method, and then measuring and calculating the average dust concentration of the sampling plane.
7. The method for testing the concentration of the necking dust of the smoking room according to claim 1, wherein the method comprises the following steps: the particulate matter is collected by a particulate matter constant-speed sampling principle, the particulate matter in the collected gas is filtered by using a glass fiber filter cylinder, and the mass of the particulate matter is determined by weighing the mass difference of the filter cylinder before and after sampling.
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