CN212134237U - Synchronous sampling device of condensable particles and sulfur trioxide in coal-fired flue gas - Google Patents
Synchronous sampling device of condensable particles and sulfur trioxide in coal-fired flue gas Download PDFInfo
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- CN212134237U CN212134237U CN201921922774.4U CN201921922774U CN212134237U CN 212134237 U CN212134237 U CN 212134237U CN 201921922774 U CN201921922774 U CN 201921922774U CN 212134237 U CN212134237 U CN 212134237U
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Abstract
The utility model discloses a particulate matter and sulfur trioxide synchronous sampling device can condense in coal-fired flue gas belongs to industrial waste gas purification environmental protection and energy field. The device aims at solving the problem that the existing equipment is difficult to effectively measure the concentration of actual condensable particles discharged into the atmosphere by coal-fired flue gas and distinguish the main component of sulfur trioxide. The utility model discloses a constant speed sampling head, filterable particulate matter filter, flue gas sampling pipe, a flowmeter, the valve, a weighing sensor and a temperature sensor, mix the awl, the room is detained, particulate matter filter can condense, a weighing sensor and a temperature sensor, relative humidity measuring apparatu, baroceptor and draught fan, the device can simulate the atmospheric hybrid process of flue gas emission, collect the particulate matter that can condense in the post-mixing gas again, set up sulfur trioxide condensing equipment through parallelly connected simultaneously, the realization is taken into account to sulfur trioxide's in the sample flue gas sampling, through the synchronous measurement to condensable particulate matter and sulfur trioxide, be favorable to carrying out the analysis to coal gas pollutants emission actual conditions.
Description
Technical Field
The utility model belongs to industrial waste gas purifies environmental protection and energy field, in particular to particulate matter and synchronous sampling device of sulfur trioxide can condense in coal-fired flue gas.
Background
The energy structure mainly based on coal in China can not be changed for a long time, so that the control of the emission of the coal-fired flue gas pollutants is an important work for governing atmospheric pollution in China. In recent years, coal-fired power plants are promoted to carry out ultralow emission modification work on a large scale, namely SO2And the emission of conventional pollutants such as NOx, smoke dust and the like is effectively controlled. On the other hand, the main components of the condensable particles are inorganic components such as sulfur trioxide and metal ions and organic components such as polycyclic aromatic hydrocarbon, the condensable particles mainly exist in the form of gas or aerosol in the flue gas, conventional flue gas treatment equipment is difficult to effectively remove the condensable particles, but when the condensable particles are discharged into the atmosphere, the condensable particles can be condensed into liquid and solid in several seconds due to the sharp reduction of the temperature, acid rain corrosion and haze are caused, and the environment and the human health are seriously harmed. In this situation, particulate matter, SO, can condense3The unconventional pollutants are increasingly paid extensive attention, and accurate detection of the unconventional pollutants is the premise of effective control.
At present, a standard condensable particle detection method is not available at home, sampling of the condensable particles is mainly divided into a direct sampling method and a dilution sampling method internationally, and the U.S. EPA method 202 method is widely used, but the method mainly utilizes the fact that the condensable particles are trapped in an impact bottle after flue gas is condensed, and the actual situation that the flue gas is discharged into the atmosphere cannot be simulated, so certain errors are generated. Some experts in China also propose to directly mix flue gas and air and then collect condensable particles by using a filtering membrane, and the mode considers the actual situation of flue gas emission, but does not control parameters such as flue gas temperature, air pressure and the like and has certain deviation. In addition, sulfur trioxide is the main component in the condensable particles, but it is influenced by boiler combustion operating mode, environmental protection facility operation condition great, if can carry out synchronous accurate detection to it, be favorable to the analysis to condense the emission condition of particles, and then implement effective control.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough among the prior art, provide a particulate matter and the synchronous sampling device of sulfur trioxide can condense in coal-fired flue gas.
The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a synchronous sampling device of particulate matter that can condense and sulfur trioxide in coal-fired flue gas which characterized in that: the device comprises a constant-speed sampling head, a filterable particulate filter, a flue gas sampling pipe, a flowmeter, a valve, a temperature sensor, a mixing cone, a retention chamber, a condensable particulate filter, a temperature sensor, a relative humidity measuring instrument, an air pressure sensor and an induced draft fan, wherein the constant-speed sampling head, the filterable particulate filter, the flowmeter, the valve, the temperature sensor, the mixing cone, the retention chamber, the condensable particulate filter, the temperature sensor, the relative humidity measuring instrument, the air pressure sensor and the induced draft fan are sequentially connected onto the flue gas sampling pipe; a flue gas branch is arranged on a flue gas sampling pipe between a particulate filter capable of filtering particulate matters and a flowmeter, and a temperature sensor, a relative humidity measuring instrument, the flowmeter, a valve, a condensing device and an induced draft fan are sequentially connected to the flue gas branch; an air branch is arranged on the flue gas sampling pipe between the temperature sensor and the mixing cone, and an air blower, a temperature adjusting device, a flowmeter, the temperature sensor, a relative humidity measuring instrument, a HEPA filter and a valve are sequentially connected to the air branch.
Further, the filterable particulate filter is a ceramic filter.
Further, filterable particulate matter filter is from taking heating device, and filterable particulate matter filter is equipped with temperature sensor.
Further, the flue gas sampling pipe has the electric tracing function and can control the temperature, and the flue gas sampling pipe is stainless steel pipe inside lining borosilicate glass.
Further, the surface of the mixing cone is provided with a plurality of small holes with the diameter of about 5mm, and the mixing cone is positioned on the mixing cone fixing device.
Further, the temperature of the condensing device is controlled between 60 ℃ and the dew point of sulfur trioxide in the sampled flue gas.
Further, the filter membrane in the filter for the condensable particulate matter is a polytetrafluoroethylene filter membrane.
Further, the flowmeter can monitor the flow of the gas in real time.
Compared with the prior art, the utility model, have following advantage and effect:
the utility model discloses the device can simulate the atmospheric hybrid process of flue gas emission, collects the particulate matter that can condense in the gas after mixing again, sets up sulfur trioxide condensing equipment through parallelly connected simultaneously, realizes taking into account sulfur trioxide's synchronous sampling in the sample flue gas. Through the synchronous measurement to the particulate matter that can condense and sulfur trioxide, be favorable to carrying out the analysis to the coal gas pollutant emission actual conditions to accurately regulate and control is carried out, satisfies the emission requirement with the emission of ensureing the pollutant.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure: the device comprises a constant-speed sampling head 1, a filterable particulate filter 2, a first temperature sensor 3, a flue gas sampling pipe 4, a first flow meter 5, a first valve 6, a second temperature sensor 7, a mixing cone fixer 8, a mixing cone 9, a detention chamber 10, a condensable particulate filter 11, a third temperature sensor 12, a first relative humidity measuring instrument 13, an air pressure sensor 14, a first induced draft fan 15, a fourth temperature sensor 16, a second relative humidity measuring instrument 17, a second flow meter 18, a second valve 19, a condensing device 20, a second induced draft fan 21, an air blower 22, a temperature regulating device 23, a third flow meter 24, a fifth temperature sensor 25, a third relative humidity measuring instrument 26, an HEPA filter 27, a third valve 28, a flue gas branch 29 and an air branch 30.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1, the device for synchronously sampling condensable particles and sulfur trioxide in coal-fired flue gas in the embodiment includes a constant-speed sampling head 1, a particulate filter 2 capable of filtering, a flue gas sampling pipe 4, a first flowmeter 5, a first valve 6, a second temperature sensor 7, a mixing cone 9, a retention chamber 10, a particulate filter 11 capable of condensing, a third temperature sensor 12, a first relative humidity measuring instrument 13, an air pressure sensor 14 and a first induced draft fan 15, wherein the constant-speed sampling head 1, the particulate filter 2 capable of filtering, the first flowmeter 5, the first valve 6, the second temperature sensor 7, the mixing cone 9, the retention chamber 10, the particulate filter 11 capable of condensing, the third temperature sensor 12, the first relative humidity measuring instrument 13, the air pressure sensor 14 and the first induced draft fan 15 are sequentially connected to the flue gas sampling pipe 4; a flue gas branch 29 is arranged on the flue gas sampling pipe 4 between the particulate filter 2 and the first flowmeter 5, and the flue gas branch 29 is sequentially connected with a fourth temperature sensor 16, a second relative humidity measuring instrument 17, a second flowmeter 18, a second valve 19, a condensing device 20 and a second induced draft fan 21; an air branch 30 is arranged on the flue gas sampling pipe 4 between the second temperature sensor 7 and the mixing cone 9, and the air branch 30 is sequentially connected with an air blower 22, a temperature adjusting device 23, a third flow meter 24, a fifth temperature sensor 25, a third relative humidity measuring instrument 26, an HEPA filter 27 and a third valve 28.
Wherein, the constant-speed sampling head 1 and the filterable particulate filter 2 are positioned in the flue, and other devices are positioned outside the flue. The constant-speed sampling head 1 is made of stainless steel, and the filterable particulate filter 2 is made of ceramicThe filter for but filter the particulate matter in the filtration flue gas is at its inside self-contained heating device, and is equipped with temperature sensor 3 No. one. The flue gas sampling pipe 4 has the electric tracing function and can control the temperature, and the flue gas sampling pipe 4 is stainless steel pipe inside lining borosilicate glass. The first flowmeter 5 and the second flowmeter 18 are used for measuring the flue gas flow, the first valve 6 and the second valve 19 are used for controlling the flue gas flow, and the condensing device 20 is used for controlling the flue gas temperature and SO in the flue gas3And condensing and collecting. The blower 22 introduces dilution air, and the temperature adjusting device 23 is used to adjust the temperature of the dilution air to a certain range. A third flow meter 24 for monitoring the dilution air flow, a HEPA filter 27 for removing particulate matter from the dilution air, and a third valve 28 for controlling the dilution air flow; the surface of the mixing cone 9 is provided with a plurality of small holes of about 5mm in diameter and the mixing cone 9 is located on the mixing cone holder 8. The filter membrane in the condensable particulate filter 11 is a teflon filter membrane. The temperature sensor, the relative humidity measuring instrument and the air pressure sensor 14 are used for monitoring the temperature, the relative humidity and the air pressure of the position where the temperature sensor, the relative humidity measuring instrument and the air pressure sensor are located, so that the sampling smoke and the dilution air can be monitored in real time in the sampling process.
The temperature sensor and the relative humidity measuring instrument can monitor the points of the temperature sensor and the relative humidity measuring instrument in real time, data can be transmitted to the existing control equipment of a computer and the like so as to be convenient for real-time control and adjustment, and the computer controls and adjusts the existing control equipment, and belongs to the existing mature technology.
The working method comprises the following steps: placing the constant-speed sampling head 1 and the filterable particulate filter 2 in a sampling flue, so that the inlet of a sampling nozzle of the constant-speed sampling head 1 is over against the flow direction of flue gas for sampling, and the speed of the sampling nozzle is controlled to be 90-120%; after entering the constant-speed sampling head 1, the flue gas filters the filterable particles through the filterable particle filter 2, and a heating device in the filterable particle filter 2 prevents other components in the flue gas from condensing; then, the flue gas flows in the flue gas sampling pipe 4, and the flue gas is prevented from being condensed in the pipe due to temperature reduction by the electric heat tracing function of the flue gas sampling pipe 4; under the action of a first draught fan 15 and a second draught fan 21, the flue gas is shunted after passing through a filterable particulate filter 2, a part of the flue gas is introduced into a condensing device 20 for cooling and condensing after passing through a second flowmeter 18 for flow measurement, the flow of the flue gas is adjusted through a second valve 19 according to requirements, and when the condensing temperature is controlled to be between 60 ℃ and the dew point of sulfur trioxide in the sampled flue gas, the sulfur trioxide in the flue gas is condensed and collected through the condensing device 20; the other part of the flue gas enters a mixing cone 9 after passing through a first flowmeter 5, the first flowmeter 5 monitors the flue gas flow in real time, meanwhile, a second temperature sensor 7 behind the first flowmeter 5 monitors the temperature of the flue gas in real time, and the flue gas flow is adjusted through a first valve 6 as required; air enters an air branch 30 through an air blower 22, air pressure is measured firstly, then the air is introduced into a temperature adjusting device 23, the temperature is controlled within a certain range, then the air is introduced into a third flowmeter 24 for flow detection, a fifth temperature sensor 25 and a third relative humidity measuring instrument 26 which are arranged at the outlet of the third flowmeter 24 are used for monitoring the air temperature and the relative humidity in real time, then the air is introduced into an HEPA filter 27 for particle filtering, the flow is controlled through a third valve 28, and the air is subjected to a series of treatments and then is diluted by the smoke in a smoke sampling pipe 4 according to a dilution ratio of 10: 1-40: the range of 1 is mixed in the mixing cone 9, the retention reaction is carried out in the retention chamber 10 after the mixing, after the condensable particles are subjected to a series of physical and chemical changes in the retention chamber 10, the condensable particles are filtered by the condensable particle filter 11 along with the mixed gas, the temperature of the mixed gas is monitored by a third temperature sensor 12 behind the condensable particle filter 11, and then the mixed gas is discharged after the relative humidity and the air pressure are detected by a first relative humidity measuring instrument 13 and an air pressure sensor 14.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should not be construed as being limited to the scope of the present invention, and any modifications and alterations made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the scope of the present invention.
Claims (6)
1. The utility model provides a synchronous sampling device of particulate matter that can condense and sulfur trioxide in coal-fired flue gas which characterized in that: comprises a constant-speed sampling head (1), a filterable particulate filter (2), a flue gas sampling pipe (4), a first flowmeter (5), a first valve (6), a second temperature sensor (7), a mixing cone (9), a detention chamber (10), a condensable particulate filter (11), a third temperature sensor (12), a first relative humidity measuring instrument (13), an air pressure sensor (14) and a first induced draft fan (15), the constant-speed sampling head (1), the filterable particulate matter filter (2), the first flowmeter (5), the first valve (6), the second temperature sensor (7), the mixing cone (9), the retention chamber (10), the condensable particulate matter filter (11), the third temperature sensor (12), the first relative humidity measuring instrument (13), the air pressure sensor (14) and the first induced draft fan (15) are sequentially connected to the smoke sampling pipe (4); a flue gas branch (29) is arranged on a flue gas sampling pipe (4) between a particulate filter (2) and a first flowmeter (5), and the flue gas branch (29) is sequentially connected with a fourth temperature sensor (16), a second relative humidity measuring instrument (17), a second flowmeter (18), a second valve (19), a condensing device (20) and a second induced draft fan (21); an air branch (30) is arranged on the flue gas sampling pipe (4) between the second temperature sensor (7) and the mixing cone (9), and an air blower (22), a temperature adjusting device (23), a third flow meter (24), a fifth temperature sensor (25), a third relative humidity measuring instrument (26), an HEPA filter (27) and a third valve (28) are sequentially connected onto the air branch (30).
2. The synchronous sampling device of condensable particles and sulfur trioxide in coal-fired flue gas according to claim 1, characterized in that: the filterable particulate filter (2) is a ceramic filter.
3. The synchronous sampling device of condensable particles and sulfur trioxide in coal-fired flue gas according to claim 1, characterized in that: filterable particulate matter filter (2) is from taking heating device, and filterable particulate matter filter (2) is equipped with temperature sensor (3) No. one.
4. The synchronous sampling device of condensable particles and sulfur trioxide in coal-fired flue gas according to claim 1, characterized in that: flue gas sampling pipe (4) have electric heat tracing function and can control the temperature, and flue gas sampling pipe (4) are stainless steel pipe inside lining borosilicate glass.
5. The synchronous sampling device of condensable particles and sulfur trioxide in coal-fired flue gas according to claim 1, characterized in that: the surface of the mixing cone (9) is provided with a plurality of small holes with the diameter of 5mm, and the mixing cone (9) is positioned on the mixing cone fixer (8).
6. The synchronous sampling device of condensable particles and sulfur trioxide in coal-fired flue gas according to claim 1, characterized in that: the filter membrane in the filter (11) for the condensable particles is a polytetrafluoroethylene filter membrane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921922774.4U CN212134237U (en) | 2019-11-08 | 2019-11-08 | Synchronous sampling device of condensable particles and sulfur trioxide in coal-fired flue gas |
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| CN201921922774.4U CN212134237U (en) | 2019-11-08 | 2019-11-08 | Synchronous sampling device of condensable particles and sulfur trioxide in coal-fired flue gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110849679A (en) * | 2019-11-08 | 2020-02-28 | 华电电力科学研究院有限公司 | Synchronous sampling device for condensable particles and sulfur trioxide in coal-fired flue gas and working method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110849679A (en) * | 2019-11-08 | 2020-02-28 | 华电电力科学研究院有限公司 | Synchronous sampling device for condensable particles and sulfur trioxide in coal-fired flue gas and working method thereof |
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