CN211025478U - In-situ flue gas pretreatment system - Google Patents
In-situ flue gas pretreatment system Download PDFInfo
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- CN211025478U CN211025478U CN201921941881.1U CN201921941881U CN211025478U CN 211025478 U CN211025478 U CN 211025478U CN 201921941881 U CN201921941881 U CN 201921941881U CN 211025478 U CN211025478 U CN 211025478U
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Abstract
The utility model discloses an original position formula flue gas pretreatment systems, original position formula flue gas pretreatment systems install in the continuous emission of flue gas monitoring system, and original position formula flue gas pretreatment systems includes: a three-way electromagnetic valve, a first filter and an ammonia remover; and a permeation drying tube and a molecular sieve adsorption dryer. The continuous smoke emission monitoring system removes the traditional condensation dryer, does not use a condensation drying mode for smoke, and avoids the dissolution loss of acidic pollutants in the smoke caused by the occurrence of condensed water; filtering, ammonia removing and drying treatment are carried out at the first time after the flue gas is extracted, SO that ammonium salt crystallization and condensate water are prevented, the adsorption or dissolution of low-concentration acidic pollutant SO2 is avoided, and the accuracy of analysis is ensured; the dew point of the treated flue gas is lower than zero, so that the normal-temperature heat tracing pipeline can be subjected to heat tracing, high-temperature heat tracing is not needed, and the service life of the heat tracing pipeline is prolonged.
Description
Technical Field
The utility model relates to an original position formula flue gas pretreatment systems.
Background
As the pollutant concentration requirement in the flue gas emission of an industrial boiler is continuously reduced, in order to meet the continuously reduced standard requirement, Selective Catalytic Reduction (SCR) and Wet Flue Gas Desulfurization (WFGD) processes are used for removing pollutants NOx, SO2 and the like in the flue gas before the flue gas emission, and the SCR and WFGD processes can increase the ammonia concentration and the humidity in the flue gas in the process of removing the pollutant concentration, SO that a Continuous Emission Monitoring System (CEMS) for the flue gas cannot meet the requirements of indication error and response time in the standard, and the measurement accuracy or the value of the low-concentration pollutants is zero.
As shown in fig. 1, the existing continuous emission monitoring system for flue gas comprises the following components: the sampling probe 101 is arranged on the platform and used for extracting smoke; a high temperature heat tracing pipeline 102 with a set temperature of more than 150 ℃ is used for conveying flue gas and is connected between the sampling probe outlet 101 and the condenser inlet 103; the flue gas dryer 103 is used for condensing and drying flue gas and condensing and separating out moisture in the flue gas in a refrigeration mode; a flue gas analyzer 104 for analyzing the concentration of pollutants in the flue gas, typically an optical analyzer;
the existing CEMS system adopts a mode which causes the formation of ammonium salt crystals and the occurrence of condensed water, thereby causing the loss of low-concentration pollutants, particularly acid gases such as SO2 and NO2, and causing the problems of inaccurate measurement and the like. Ammonium salt crystals are formed by the reaction of ammonia in flue gas with SO2 and water vapor, and generally occur in transmission lines and condensers, resulting in adsorption losses of SO 2. The condensed water is caused by the drying method used in the existing CEMS system, and the moisture in the flue gas is changed into liquid state by the refrigeration method and is discharged by the pump, in the process, the liquid water also causes absorption loss to the SO2 pollutant gas.
The existing flue gas continuous emission monitoring system has the following defects when being applied to the monitoring process of low-concentration pollutants:
1. besides the measurement error caused by the adsorption of acidic pollutant gases due to ammonium salt crystals formed by ammonia gas, SO2 and water vapor in the flue gas, the crystals can also cause the blockage of pipelines and analyzers in a flue gas continuous emission monitoring system.
2. The condenser used in the existing CEMS system can generate liquid condensate water in the process of drying flue gas, so that the dissolution loss of acidic pollutant gas is caused, the accuracy of analysis and measurement is influenced, and the CEMS can not meet the requirements of response time and indication error in the standard.
Disclosure of Invention
The utility model aims at solving the above problem and providing an original position formula flue gas pretreatment systems, not only can stop the appearance of comdenstion water and cause the loss of dissolving of acid pollutant in the flue gas, prevented the production of ammonium salt crystallization and comdenstion water, stop the acid pollutant SO2 of low concentration and adsorbed or dissolve, guaranteed the accuracy of analysis, need not high temperature heat tracing, prolong the life of heat tracing pipeline.
The purpose of the utility model is realized like this:
the utility model discloses an original position formula flue gas pretreatment systems, original position formula flue gas pretreatment systems install in the continuous emission of flue gas monitoring system, and this continuous emission of flue gas monitoring system includes:
a sampling probe for extracting smoke;
a high-temperature heat tracing pipeline, one end of which is connected with the outlet of the sampling probe gun and the other end of which is connected with the inlet of the in-situ flue gas pretreatment system;
a normal temperature heat tracing pipeline, one end of which is connected with the outlet of the in-situ flue gas pretreatment system, and the other end of which is connected with the inlet pipeline of an analyzer;
the in-situ flue gas pretreatment system comprises:
two ports of the three-way electromagnetic valve are respectively connected with an outlet of the high-temperature heat tracing pipeline and a compressed gas pipeline;
a first filter connected to a remaining one port of the three-way solenoid valve, the first filter having a first waste discharge port connected to a vacuum port of a vacuum generator for extracting a substance to be discharged from the first filter through a waste discharge pipe, the waste discharge pipe having a waste discharge solenoid valve for controlling communication and disconnection of the first waste discharge port of the first filter and the vacuum port of the vacuum generator, the vacuum generator having a second waste discharge port, the vacuum generator being connected to a compressed gas pipe through a first compressed gas branch pipe, and the first compressed gas branch pipe having a pressure regulating valve;
an ammonia remover connected with the first filter; and
an inlet end of the permeation drying pipe is connected with the ammonia remover so as to remove moisture in the flue gas, an outlet end of the permeation drying pipe is connected with the normal-temperature heat tracing pipeline, a back-blowing outlet of the permeation drying pipe is connected with the vacuum generator through a back-blowing outlet pipeline, and back-blowing gas exhausted from the back-blowing outlet of the permeation drying pipe is extracted through the vacuum generator; and
the outlet of the molecular sieve adsorption dryer is connected with a back-blowing gas inlet of the permeation drying pipe through a back-blowing gas inlet pipeline, a float flowmeter for adjusting and indicating the flow of back-blowing gas entering the permeation drying pipe is arranged on the back-blowing gas inlet pipeline, and the inlet of the molecular sieve adsorption dryer is connected with the compressed gas pipeline through a second compressed gas branch pipe;
the in-situ flue gas pretreatment system comprises a high-temperature area with the set temperature of 80-95 ℃ to prevent moisture in flue gas from forming liquid water, and the three-way electromagnetic valve, the first filter, the ammonia remover and the vacuum generator are positioned in the high-temperature area.
The compressed gas pipeline in the in-situ flue gas pretreatment system further comprises a manual valve, a gas storage tank and a second filter which are sequentially arranged along the gas flow direction.
The ammonia remover in the in-situ flue gas pretreatment system comprises a plurality of sub ammonia removers connected in series.
A vacuum pressure gauge for displaying the vacuum pressure of the vacuum generator is arranged on the back-blowing outlet pipeline in the in-situ flue gas pretreatment system.
The back-blowing outlet pipeline in the in-situ flue gas pretreatment system is connected with a waste discharge pipeline between the waste discharge electromagnetic valve and the vacuum generator.
The penetration drying tube in the in-situ flue gas pretreatment system is a gaseous dehumidification penetration drying tube.
The high-temperature heat tracing pipeline in the in-situ flue gas pretreatment system comprises a high-temperature heat tracing pipeline and high-temperature heating equipment which is arranged on the outer surface of the high-temperature heat tracing pipeline and used for keeping the temperature of the high-temperature heat tracing pipeline at 120-200 ℃.
The normal-temperature heat tracing pipeline in the in-situ flue gas pretreatment system comprises a normal-temperature heat tracing pipeline and normal-temperature heating equipment which is arranged on the outer surface of the normal-temperature heat tracing pipeline and used for keeping the temperature of the normal-temperature heat tracing pipeline at 20-80 ℃.
The inlet end of the penetration drying tube in the in-situ flue gas pretreatment system is positioned in a high-temperature area.
The continuous smoke emission monitoring system removes the traditional condensation dryer, does not use a condensation drying mode for smoke, and avoids the dissolution loss of acidic pollutants in the smoke caused by the occurrence of condensed water; filtering, ammonia removing and drying treatment are carried out at the first time after the flue gas is extracted, SO that ammonium salt crystallization and condensate water are prevented, the adsorption or dissolution of low-concentration acidic pollutant SO2 is avoided, and the accuracy of analysis is ensured; the dew point of the treated flue gas is lower than zero, so that the normal-temperature heat tracing pipeline can be subjected to heat tracing, high-temperature heat tracing is not needed, and the service life of the heat tracing pipeline is prolonged.
Drawings
FIG. 1 is a schematic diagram of a conventional continuous emission monitoring system for flue gas;
FIG. 2 is a schematic structural diagram of a continuous emission monitoring system for flue gas using the in-situ flue gas pretreatment system of the present invention;
fig. 3 is a schematic structural diagram of the in-situ flue gas pretreatment system of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 2, a state diagram of the in-situ flue gas pretreatment system installed in the continuous flue gas emission monitoring system of the present invention is shown, and the continuous flue gas emission monitoring system includes:
a sampling probe 101 mounted on the platform for extracting smoke;
one end of the high-temperature heat tracing pipeline is connected with the outlet of the sampling probe 101, and the other end of the high-temperature heat tracing pipeline 102 is connected with the inlet of the in-situ flue gas pretreatment system 200 of the utility model for flue gas transmission, so that the flue gas of the in-situ flue gas pretreatment system 200 of the utility model is used for treatment, the particulate matters in the flue gas are filtered, the ammonia and the moisture in the flue gas are removed, and clean and dry flue gas is output;
one end of the normal-temperature heat tracing pipeline 106 is connected with an outlet of the in-situ flue gas pretreatment system 200, the other end of the normal-temperature heat tracing pipeline is connected with an inlet pipeline of the analyzer 104 and used for transmitting the treated flue gas, the set temperature of the treated flue gas is 20-80 ℃, the analyzer 104 is used for analyzing the concentration of pollutants in the flue gas, and an optical analyzer is usually selected.
Referring to fig. 3, the in-situ flue gas pretreatment system 200 of the present invention is shown comprising:
two ports of the three-way electromagnetic valve 201 are respectively connected with an outlet of the high-temperature heat tracing pipeline 102 with the set temperature of 120-200 ℃ and a compressed gas pipeline 107; in this embodiment, the compressed gas pipeline 107 further includes a manual valve 107a, a gas storage tank 107b and a second filter 107c sequentially arranged along the gas flow direction.
A first filter 202 connected to a remaining one port of the three-way solenoid valve 201, the first filter 202 having a first discharge port connected to a vacuum port of a vacuum generator 202b for pumping a substance to be discharged in the first filter 202 through a discharge pipe 202a, the discharge pipe 202a having a discharge solenoid valve 202c for controlling communication and disconnection of the first discharge port of the first filter 202 with and from the vacuum port of the vacuum generator 202b, the vacuum generator 202b having a second discharge port 202d, the vacuum generator 202b being connected to the compressed gas pipe 107 through a first compressed gas branch pipe 107d, and the first compressed gas branch pipe 107d having a pressure regulating valve 202 e;
an ammonia remover 203 connected to the first filter 202, wherein the ammonia remover 203 comprises a first ammonia remover 203a and a second ammonia remover 203b connected in series; and
an inlet end of the permeation drying tube 204 is connected with the ammonia remover 203 to remove moisture in the flue gas, an outlet end of the permeation drying tube 204 is connected with the normal temperature heat tracing pipeline 106, a back-blowing outlet of the permeation drying tube 204 is connected with the vacuum generator 202b through a back-blowing outlet pipeline 204a and draws back the back-blowing gas discharged from the back-blowing outlet of the permeation drying tube 204 through the vacuum generator 202b, in the embodiment, a vacuum pressure gauge 204b for displaying the vacuum pressure of the vacuum generator 202b is arranged on the back-blowing outlet pipeline 204a, and the back-blowing outlet pipeline 204a is connected with the waste discharge pipeline 202a at the outlet of the waste discharge electromagnetic valve 202 c; and
a molecular sieve adsorption dryer 205 with an outlet connected to the blowback inlet of the permeation drying tube 204 through a blowback inlet pipe 204c, the blowback inlet pipe 204c is provided with a float flow meter 206 for adjusting and indicating the flow of the dry blowback gas into the permeation drying tube 204, the inlet of the molecular sieve adsorption dryer 205 is connected to the compressed gas pipe 107 through a second compressed gas branch pipe 107e, in this embodiment, the permeation drying tube 204 is a gaseous dehumidification permeation drying tube, such as a Nafion permeation drying tube.
The utility model discloses an use, the flue gas gets into normal position formula flue gas pretreatment systems 200 through high temperature heat tracing pipeline 102, and the flue gas gets into normal position formula pretreatment systems 200's high temperature area, and high temperature area set temperature is 80 ~ 95 ℃ so that prevent the moisture in the high wet flue gas and form liquid water, and the control through three solenoid valve 201 gets into first filter 202 and carries out filtration, gets rid of the particulate matter in the flue gas. The filtered flue gas enters an ammonia remover 203a and an ammonia remover 203b to remove ammonia gas in the flue gas, then enters a permeation drying pipe 204 for drying treatment, and the dried flue gas flows out from the outlet end of the permeation drying pipe 204 and enters a normal-temperature heat tracing pipeline 106.
The permeation drying tube 204 uses a gas dehumidification drying technology, and the permeation drying tube 204 has strong permeability only for water molecules through the unique permeation characteristics of the permeation drying tube 204, SO as to remove the moisture in the flue gas, and no liquid condensate water is generated when the moisture in the flue gas is removed, SO that the dissolution loss of the low-concentration acidic pollutant SO2 is prevented.
The permeation drying pipe 204 needs to create a humidity difference between the inside and the outside of the pipe in the process of permeating moisture, so that the compressed gas passes through the molecular sieve adsorption dryer 205 to obtain a very dry blowback gas, and enters the permeation drying pipe 204 through the adjustment of the float flowmeter 206 to perform continuous blowback, so that the moisture in the flue gas continuously permeates into the dry blowback gas, and is extracted by the vacuum pressure generated by the vacuum generator 202b and discharged from the second waste discharge port 202 d.
The in-situ flue gas pretreatment system 200 includes a high temperature zone with a set temperature to prevent moisture in the flue gas from forming liquid water, and the three-way solenoid valve 201, the first filter 202, the ammonia remover 203 and the vacuum generator 202b are located in the high temperature zone. The inlet end of the permeate drying tube 204 may optionally be installed in a high temperature zone.
The continuous fume emission monitoring system 200 of the utility model removes the traditional condensation dryer 103, does not use the condensation drying mode for fume, and avoids the dissolution loss of acidic pollutants in the fume due to the occurrence of condensed water; filtering, ammonia removing and drying treatment are carried out at the first time after the flue gas is extracted, SO that ammonium salt crystallization and condensate water are prevented, the adsorption or dissolution of low-concentration acidic pollutant SO2 is avoided, and the accuracy of analysis is ensured; the dew point of the treated flue gas is lower than zero, so that the normal-temperature heat tracing pipeline can be subjected to heat tracing, high-temperature heat tracing is not needed, and the service life of the heat tracing pipeline is prolonged.
The above embodiments are provided only for the purpose of illustration, not for the limitation of the present invention, and those skilled in the relevant art can make various changes or modifications without departing from the spirit and scope of the present invention, therefore, all equivalent technical solutions should also belong to the scope of the present invention, and should be defined by the claims.
Claims (9)
1. The utility model provides an original position formula flue gas pretreatment systems, original position formula flue gas pretreatment systems installs in the continuous emission of flue gas monitoring system, and this continuous emission of flue gas monitoring system includes:
a sampling probe for extracting smoke;
one end of the high-temperature heat tracing pipeline is connected with the outlet of the sampling probe gun, and the other end of the high-temperature heat tracing pipeline is connected with the inlet of the in-situ flue gas pretreatment system;
a normal temperature heat tracing pipeline, one end of which is connected with the outlet of the in-situ flue gas pretreatment system, and the other end of which is connected with an inlet pipeline of an analyzer;
it is characterized in that the in-situ flue gas pretreatment system comprises:
two ports of the three-way electromagnetic valve are respectively connected with the outlet of the high-temperature heat tracing pipeline and a compressed gas pipeline;
a first filter connected to a remaining one port of the three-way solenoid valve, the first filter having a first waste discharge port connected to a vacuum port of a vacuum generator for extracting a substance to be discharged in the first filter through a waste discharge pipe, the waste discharge pipe having a waste discharge solenoid valve for controlling communication and disconnection of the first waste discharge port of the first filter and the vacuum port of the vacuum generator, the vacuum generator having a second waste discharge port, the vacuum generator being connected to a compressed gas pipe through a first compressed gas branch pipe, the first compressed gas branch pipe having a pressure regulating valve;
an ammonia remover connected with the first filter; and
an inlet end of the permeation drying pipe is connected with the ammonia remover so as to remove moisture in the flue gas, an outlet end of the permeation drying pipe is connected with the normal-temperature heat tracing pipeline, a back-blowing outlet of the permeation drying pipe is connected with the vacuum generator through a back-blowing outlet pipeline, and back-blowing air exhausted from the back-blowing outlet of the permeation drying pipe is extracted through the vacuum generator; and
the outlet of the molecular sieve adsorption dryer is connected with a back-blowing gas inlet of the permeation drying pipe through a back-blowing gas inlet pipeline, a float flowmeter for adjusting and indicating the flow of back-blowing gas entering the permeation drying pipe is arranged on the back-blowing gas inlet pipeline, and the inlet of the molecular sieve adsorption dryer is connected with the compressed gas pipeline through a second compressed gas branch pipe;
the in-situ flue gas pretreatment system comprises a high-temperature area with the set temperature of 80-95 ℃ to avoid the moisture in the flue gas from forming liquid water, and the three-way electromagnetic valve, the first filter, the ammonia remover and the vacuum generator are located in the high-temperature area.
2. The in-situ flue gas pretreatment system of claim 1, further comprising a manual valve, a gas storage tank, and a second filter disposed in sequence along the gas flow direction.
3. The in-situ flue gas pretreatment system of claim 1, wherein the ammonia remover comprises a plurality of sub-ammonia removers connected in series.
4. The in-situ flue gas pretreatment system of claim 1, wherein a vacuum pressure gauge for displaying the vacuum pressure of said vacuum generator is disposed on said blowback outlet pipe.
5. The in-situ flue gas pretreatment system of claim 1, wherein said blowback outlet conduit is connected to said waste conduit between said waste solenoid valve and said vacuum generator.
6. The in-situ flue gas pretreatment system of claim 1, wherein the permeate drying tube is a gaseous dehumidifying permeate drying tube.
7. The in-situ flue gas pretreatment system of claim 1, wherein the high temperature heat tracing pipeline comprises a high temperature heat tracing pipeline and a high temperature heating device arranged on the outer surface of the high temperature heat tracing pipeline for maintaining the temperature of the high temperature heat tracing pipeline at 120-200 ℃.
8. The in-situ flue gas pretreatment system according to claim 1, wherein the normal temperature heat tracing pipeline comprises a normal temperature heat tracing pipeline and a normal temperature heating device arranged on the outer surface of the normal temperature heat tracing pipeline for keeping the temperature of the normal temperature heat tracing pipeline at 20-80 ℃.
9. The in-situ flue gas pretreatment system of claim 1, wherein the inlet end of the infiltration drying tube is located in a high temperature zone.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921941881.1U CN211025478U (en) | 2019-11-11 | 2019-11-11 | In-situ flue gas pretreatment system |
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| CN201921941881.1U CN211025478U (en) | 2019-11-11 | 2019-11-11 | In-situ flue gas pretreatment system |
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| CN211025478U true CN211025478U (en) | 2020-07-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179866A (en) * | 2020-09-14 | 2021-01-05 | 聚光科技(杭州)股份有限公司 | Flue gas detection device and method based on photoelectric analysis |
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2019
- 2019-11-11 CN CN201921941881.1U patent/CN211025478U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179866A (en) * | 2020-09-14 | 2021-01-05 | 聚光科技(杭州)股份有限公司 | Flue gas detection device and method based on photoelectric analysis |
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Address after: 201108 room 506, building 3, 2350 Duzhuang Road, Minhang District, Shanghai Patentee after: Shanghai Chunxi Application Technology Co.,Ltd. Address before: 201108 room 506, building 3, 2350 Duzhuang Road, Minhang District, Shanghai Patentee before: Shanghai Chunxi Application Technology Co.,Ltd. |
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