Flue gas sampling device and automatic flue gas monitoring system comprising same

Abstract

The utility model relates to a flue gas sampling device and an automatic flue gas monitoring system comprising the same. The flue gas sampling device comprises a pre-filter, the pre-filter is provided with two ends, namely an input end and an output end, the input end is connected with a denitration process section to be detected, flue gas to be detected is introduced, dust in a flue is blocked outside the flue gas sampling device, and the flue gas sampling device is prevented from being blocked; the sampling rod is provided with two ends, one end of the sampling rod is connected with the output end of the pre-filter, and the sampling rod is used for realizing a flue gas transmission passage, so that the flue gas keeps relatively stable pressure in the sampling rod; the gas extractor is a vacuum gas extractor and is a power device for extracting flue gas, an opening is formed in the side wall of the sampling rod or a guide pipe is arranged on the side wall of the sampling rod and is used for being connected with the gas extractor, and the gas extractor extracts the flue gas which passes through the pre-filter to the sampling rod. According to the flue gas sampling device disclosed by the utility model, stable flue gas pressure can be realized, the flue gas sampling device is prevented from being blocked by dust removal, and stable operation of an automatic flue gas monitoring system is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke sampling, in particular to a smoke sampling device and a smoke automatic monitoring system comprising the device. Background Art

[0002] Nitrogen oxides (NOx) are gases produced by the oxidation of nitrogen during the combustion process. They not only irritate the human respiratory system, harm animals and plants, and destroy the ozone layer, but are also one of the main substances that cause greenhouse effects, acid rain, and photochemical reactions. In order to prevent excessive NOx from polluting the environment after coal combustion in the boiler, it is necessary to remove nitrogen oxides from the combustion flue gas.

[0003] The current denitrification process has high flue gas temperature, large pressure fluctuations, and high dust content, which leads to practical problems such as clogging and severe wear of the flue gas sampling device. Therefore, how to achieve long-term reliable and stable sampling analysis is crucial for the stable and reliable operation of the CEMS system (Continuous Emission Monitoring System). Summary of the invention

[0004] The technical problem to be solved by the utility model is how to achieve long-term reliable and stable sampling and analysis of the denitrification process section, reduce the probability of clogging of the sampling device, reduce the maintenance of the denitrification CEMS equipment, and improve the measurement stability of the CEMS system (flue gas automatic monitoring system).

[0005] In order to solve the above technical problems, according to one aspect of the utility model, a flue gas sampling device is provided, which includes: a pre-filter, the pre-filter has two ends, which are an input end and an output end, one end of the input is connected to the denitrification process section to be detected, and the flue gas to be detected is introduced to block the dust in the flue outside the flue gas sampling device to prevent the flue gas sampling device from being blocked; a sampling rod, which has two ends, one end of which is connected to the output end of the pre-filter, and is used to realize a passage for flue gas transmission so that the flue gas maintains a relatively stable pressure therein; an exhauster, the exhauster is a vacuum exhauster, which is a power device for extracting flue gas, wherein the side wall of the sampling rod is opened or a conduit is set on the side wall for connecting the exhauster, wherein the exhauster extracts flue gas through the pre-filter to the sampling rod, thereby realizing air pressure stability, and dust removal avoids clogging of the flue gas sampling device, thereby ensuring stable operation of the automatic flue gas monitoring system.

[0006] According to an embodiment of the utility model, the smoke sampling device may also include: a post-filter, which is connected to the other end of the sampling rod and is used to block extremely fine dust entering the smoke sampling device on the surface of the post-filter to prevent fine particles from clogging the downstream sonic holes.

[0007] According to an embodiment of the present invention, the material of the pre-filter may be Hastelloy C-276, with a specification of less than 1 um.

[0008] According to an embodiment of the present utility model, the model of the pre-filter may be: MFILTER_23A.

[0009] According to the embodiment of the utility model, the material of the sampling rod can be: 316L stainless steel pipe, outer diameter OD17.5mm, inner diameter ID10mm.

[0010] According to the embodiment of the utility model, the specification model of the sampling rod can be: MPRO-1.5A.

[0011] According to the embodiment of the utility model, the material of the vacuum extractor can be: 304 stainless steel, and the vacuum degree is greater than -30KPa.

[0012] According to the embodiment of the utility model, the specification model of the vacuum extractor can be: MPUM-240A

[0013] According to the embodiment of the utility model, the material of the post filter can be glass fiber, the specification is 0.1um, and the model is: 26002018.

[0014] According to another aspect of the utility model, a smoke automatic monitoring system is provided, comprising the smoke sampling device mentioned above.

[0015] Compared with the prior art, the technical solution provided by the embodiment of the utility model can at least achieve the following beneficial effects:

[0016] The flue gas sampling device of the utility model adopts a gas plug type voltage stabilization design, which can ensure that the CEMS measurement system always operates stably and will not cause data measurement abnormalities due to changes in unit load.

[0017] The smoke sampling device of the utility model can remove dust efficiently, thereby avoiding the phenomenon of clogging of the sampling rod.

[0018] The smoke sampling device according to the utility model is simple to manufacture, disassemble and assemble, requires little investment and has obvious effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present utility model, rather than limiting the present utility model.

[0020] Figure 1 Schematic diagram of a smoke sampling device according to the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the patent application specification and claims of the utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantity limitation, but indicate the existence of at least one.

[0023] Figure 1 Schematic diagram of a smoke sampling device according to the utility model.

[0024] like Figure 1 As shown, the smoke sampling device includes: a pre-filter 1, a sampling rod 2 and an exhauster 3.

[0025] The pre-filter 1 has two ends, an input end and an output end. The input end is connected to the denitration process section to be detected, and introduces the flue gas to be detected, so as to block the dust in the flue outside the flue gas sampling device and prevent the flue gas sampling device from being blocked.

[0026] The sampling rod 2 has two ends, one end of which is connected to the output end of the pre-filter 1 and is used to realize a passage for smoke transmission so that the smoke maintains a relatively stable pressure therein.

[0027] The vacuum extractor 3 is a vacuum vacuum extractor 3, which is a power device for extracting flue gas.

[0028] The sampling rod 2 has an opening on its side wall or a conduit disposed on its side wall for connecting to the vacuum extractor 3 .

[0029] The exhauster 3 extracts the flue gas, passes through the pre-filter 1 to the sampling rod 2, so as to achieve stable air pressure, and dust removal avoids clogging of the flue gas sampling device, thus ensuring the stable operation of the automatic flue gas monitoring system.

[0030] The flue gas sampling device of the utility model adopts a gas plug type voltage stabilization design, which can ensure that the CEMS measurement system always operates stably and will not cause data measurement abnormalities due to changes in unit load.

[0031] According to one or some embodiments of the present invention, the smoke sampling device further includes a post-filter 4 .

[0032] The post-filter 4 is connected to the other end of the sampling rod 2 and is used to block the extremely fine dust entering the smoke sampling device on the surface of the post-filter 4 to prevent the fine particles from clogging the downstream sonic holes.

[0033] According to one or some embodiments of the present invention, the material of the pre-filter 1 is Hastelloy C-276, and the specification is less than 1um.

[0034] According to one or some embodiments of the present invention, the model of the pre-filter 1 is: MFILTER_23A.

[0035] The smoke sampling device of the utility model can remove dust efficiently, thereby avoiding the phenomenon of clogging of the sampling rod 2.

[0036] According to one or some embodiments of the present invention, the sampling rod 2 is made of: 316L stainless steel pipe, with an outer diameter OD17.5mm and an inner diameter ID10mm.

[0037] According to one or some embodiments of the present invention, the specification model of the sampling rod 2 is: MPRO-1.5A.

[0038] According to one or some embodiments of the present invention, the vacuum extractor 3 is made of 304 stainless steel, and the vacuum degree is greater than -30 KPa.

[0039] According to one or some embodiments of the present invention, the specification model of the vacuum extractor 3 is: MPUM-240A

[0040] According to one or some embodiments of the present invention, the post-filter 4 is made of glass fiber with a specification of 0.1 um and a model number of 26002018.

[0041] According to another aspect of the utility model, a smoke automatic monitoring system is provided, comprising the smoke sampling device mentioned above.

[0042] When in use, the pre-filter 1 is connected to the denitrification process section to be tested, and the flue gas to be tested is introduced to block the dust in the flue outside the flue gas sampling device to prevent the flue gas sampling device from being blocked. The exhauster 3 extracts the flue gas through the pre-filter 1 to the sampling rod 2 to achieve stable air pressure, and dust removal to avoid clogging of the flue gas sampling device, ensuring the stable operation of the automatic flue gas monitoring system.

[0043] The smoke sampling device according to the utility model is simple to manufacture, disassemble and assemble, requires little investment and has obvious effects.

[0044] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A flue gas sampling device, characterized in that: include: A pre-filter, wherein the pre-filter has two ends, namely an input end and an output end, wherein the input end is connected to the denitration process section to be detected, and introduces the flue gas to be detected, so as to block the dust in the flue outside the flue gas sampling device and prevent the flue gas sampling device from being blocked; A sampling rod having two ends, one end of which is connected to the output end of the pre-filter and is used to realize a passage for smoke transmission so that the smoke maintains a relatively stable pressure therein; The vacuum extractor is a vacuum extractor, which is a power device for extracting flue gas. The sampling rod has an opening on the side wall or a conduit on the side wall for connecting to the vacuum pump. The exhauster extracts the flue gas through the pre-filter to the sampling rod, so as to achieve stable air pressure, and dust removal to avoid clogging of the flue gas sampling device, thus ensuring stable operation of the automatic flue gas monitoring system; The post-filter is connected to the other end of the sampling rod and is used to block the extremely fine dust entering the smoke sampling device on the surface of the post-filter to prevent the fine particles from clogging the downstream sonic holes.

2. The smoke sampling device according to claim 1, characterized in that: The material of the pre-filter is Hastelloy C-276, and the specification is less than 1um.

3. The smoke sampling device according to claim 1, characterized in that: The model of the pre-filter is: MFILTER_23A.

4. The smoke sampling device according to claim 1, characterized in that: The sampling rod is made of 316L stainless steel pipe with an outer diameter of OD17.5mm and an inner diameter of ID10mm.

5. The smoke sampling device according to claim 1, characterized in that: The specification model of the sampling rod is: MPRO-1.5A.

6. The smoke sampling device according to claim 1, characterized in that: The vacuum pump is made of 304 stainless steel, and the vacuum degree is greater than -30KPa.

7. The smoke sampling device according to claim 1, characterized in that: The specification model of the vacuum extractor is: MPUM-240A.

8. The smoke sampling device according to claim 1, characterized in that: The post-filter is made of glass fiber with a specification of 0.1um and a model number of 26002018.

9. A smoke automatic monitoring system, characterized in that: It comprises a smoke sampling device as described in any one of claims 1 to 8.

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