CN209961552U - Continuous online dioxin sampling device - Google Patents
Continuous online dioxin sampling device Download PDFInfo
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- CN209961552U CN209961552U CN201920462383.2U CN201920462383U CN209961552U CN 209961552 U CN209961552 U CN 209961552U CN 201920462383 U CN201920462383 U CN 201920462383U CN 209961552 U CN209961552 U CN 209961552U
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Abstract
The utility model provides a continuous online sampling device of dioxin belongs to the sampling technical field of dioxin in the flue gas, and the device includes sampling head, tobacco pipe, auxiliary heating unit, flue gas filter equipment, condensing equipment, adsorption equipment, comdenstion water filter equipment, sampling switch, control system, can realize incessant sampling, the utility model has the characteristics of compact structure, easy operation, conveniently carry, can be used for the sample collection of dioxin in the flue gas.
Description
Technical Field
The utility model relates to a dioxin collection technical field in the flue gas, continuous dioxin sample collection device in concretely relates to flue gas.
Background
The dioxin discharged by the industries of garbage incineration, hazardous waste incineration, steel sintering smoke, funeral and interment and the like in ten major dioxin discharge industries accounts for more than 70 percent of the dioxin discharge. The main control technology aiming at dioxin discharged in flue gas at present comprises the following steps: adding an inhibitor, using an adsorbent such as activated carbon and the like, SCR catalytic degradation and the like, wherein the activated carbon adsorption is the mainstream technology, waste gas enters an adsorption reaction tower, dioxin substances are adsorbed in particles such as activated carbon (or the adsorbent) through an activated carbon bed layer (or the adsorbent is injected), then the particles are effectively removed through a dust removal facility, and the discharged dioxin is lower than the national standard.
However, because laboratory analysis of dioxin is extremely complex, no dioxin on-line monitoring technology exists at present, and the dioxin can only be sampled for 3 hours on site and then is brought back to the laboratory for analysis. Therefore, the gap in dioxin emission monitoring is realized, and in order to save cost, an enterprise stops spraying activated carbon to the flue gas in the dioxin non-sampling time so as to reduce the operation cost. How to monitor the emission of dioxin is a problem to be solved.
Disclosure of Invention
The utility model discloses mainly solve the effective control of dioxin, provide a method, through the mode of automatic trade appearance, realize 365 days incessant samplings, can transfer the sample of any time quantum and test the analysis, avoided the enterprise in order to practice thrift the cost and shut down dioxin emission reduction facility.
The utility model discloses a following technical scheme realizes.
A continuous online dioxin sampling device is characterized by comprising:
the sampling head 1 is placed in a flue gas sampling port opened in a chimney to extract flue gas in the chimney, the flue gas enters a flue gas filtering device through a flue pipe 2, an auxiliary heating unit 3 heats the flue pipe 2 to ensure that the temperature of the flue gas is kept above 105 ℃ when the flue gas passes through the flue pipe 2, and the flue gas is not condensed.
When the flue gas enters the flue gas filtering device 4, particulate matters contained in the flue gas are trapped in the filtering device, and the particulate matters and the dioxin loaded on the particulate matters are trapped by the filter cylinder.
The flue gas gets into condensing equipment 5, and the aqueous vapor in the flue gas separates in condensing equipment 5, and the comdenstion water gets into condensation filter equipment 7, and in gas got into adsorption equipment 6, the dioxin in the gas was adsorbed by the resin in adsorption equipment 6, and the atmosphere is discharged through adsorption equipment 6.
The water separated from the water vapor in the flue gas in the condensing device 5 enters the condensed water filtering device 7, dioxin contained in the water is intercepted and adsorbed by the filter cartridge of the condensed water filtering device 7, and the filtered water is discharged into a sewage system.
When the dioxin trapped and adsorbed in the filter cylinder, the resin cylinder and the filter cylinder is saturated, the cycle is a sampling cycle, and the time of the cycle is set according to the sampled flue gas flow rate, the particulate matter concentration in the flue gas and the like and is input into the control system 9.
The control system 9 automatically switches to the next cycle when one sampling cycle is over, according to the set cycle.
According to actual needs, after a specific period is finished, the filter cartridge, the resin cartridge and the filter cartridge are replaced, the sampling time length is recorded, and the replaced filter cartridge, the replaced resin cartridge and the replaced filter cartridge are taken back to a laboratory for dioxin analysis.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a continuous online dioxin sampling device according to an embodiment of the present invention.
Detailed Description
Dioxin in flue gas discharged by a certain waste incineration plant is continuously sampled on line, the temperature of the flue gas at a sampling port is 125 ℃, and the concentration of particulate matters in the flue gas is 5mg/m3The concentration of dioxin in the flue gas is 0.01-0.1ngTEQ/m3。
And setting the sampling flow rate to be 3m/s, estimating each sampling period to be 12 days according to the information, and knowing the average value of the dioxin in the flue gas of the waste incineration plant for 30 days.
Specifically, after all parameters are set in the control system 9, in the filter cartridge, the resin cartridge and the filter cartridge number 1 in the initial state flue gas filtering device (4), the adsorption device (6) and the condensed water filtering device (7), the sampling switch 8 is turned on, sampling starts and timing is automatically performed in the control system 9, because the temperature in the flue gas is 125 ℃, the auxiliary heating unit (3) does not need to be turned on, the flue gas enters the flue gas filtering device 4 through the flue pipe 2, particulate matters and dioxin loaded on the flue gas are intercepted by the filter cartridge, then the flue gas enters the condensing device 5, the water and the steam in the flue gas are separated in the condensing device 5, the gas enters the adsorption device 6, the dioxin in the gas is adsorbed by resin in the adsorption device 6, the used resin is XAD-2 type resin, and the flue gas after passing through the resin is discharged into the atmosphere; the water that aqueous vapor in the flue gas separates out in condensing equipment 5 gets into comdenstion water filter equipment 7, and the dioxin that contains in the aquatic is held back by comdenstion water filter equipment 7 cartridge filter and is adsorbed, and the water after filtering discharges in sewage system.
And after the 12 th day, the first period is finished, the control system 9 closes the sampling switch 8, controls the flue gas filtering device (4), the adsorption device (6) and the condensed water filtering device (7) to be switched to the filter cylinder, the resin cylinder and the filter cylinder number 2 at the same time, and after 5 seconds, the sampling switch 8 is opened to continue sampling work and enter the second period.
And after 24 days, entering a third period, automatically stopping sampling by the system when 30 days later, taking out the filter cartridge, the resin cartridge and the filter cartridge with the serial numbers of 1, 2 and 3, and bringing the filter cartridge, the resin cartridge and the filter cartridge back to a laboratory for dioxin analysis to obtain the average concentration of dioxin in 30 days.
The utility model provides a technical scheme has compact structure, easy operation, the characteristics that conveniently carry, can sample in succession the dioxin in the flue gas, can be arranged in all to burn the sample collection of dioxin in the factory flue gas.
Claims (7)
1. The continuous online dioxin sampling device is characterized by comprising a sampling head (1), a smoke pipe (2), an auxiliary heating unit (3), a smoke filtering device (4), a condensing device (5), an adsorption device (6), a condensed water filtering device (7), a sampling switch (8) and a control system (9).
2. The continuous online dioxin sampling device according to claim 1, characterized in that the auxiliary heating unit (3) heats the smoke tube (2) and controls the smoke temperature in the smoke tube (2) to 105-160 ℃.
3. The continuous online dioxin sampling device according to claim 1, characterized in that there are 10 cartridges in the smoke filtering device (4) for trapping dioxin adsorbed in dust in the smoke, each cartridge is capable of being controlled by the control system (9) to be docked with the smoke coming from the smoke pipe (2), and each cartridge has a corresponding number of 10.
4. The continuous online dioxin sampling device according to claim 1, characterized in that there are 10 resin cartridges in the adsorption device (6), the resin is used for adsorbing dioxin in flue gas, each resin cartridge can be controlled by the control system (9) to be docked with flue gas from passing through the condensing device (5), and each resin cartridge has 10 corresponding numbers.
5. The continuous online dioxin sampling device according to claim 1, wherein there are 10 filter cartridges in the condensed water filter unit (7), each filter cartridge being capable of controlling the docking of condensed water from the condenser unit (5) by the control system (9), the filter membranes in the filter cartridges being used for filtering dioxin remaining in condensation, and each filter cartridge being numbered correspondingly 10, and the filtered water being discharged to a sewer network.
6. The continuous online dioxin sampling device according to claim 1, characterized in that the control system (9) sets the numbers of the filter cartridge, the resin cartridge and the filter cartridge in the initial sampling period to be 1, the collection of the flue gas is started after the sampling switch (8) is turned on, the control system (9) can set the sampling time in each period, when one sampling period is finished, 5 to 20 seconds are left after the sampling switch (8) is turned off, the flue gas filtering device (4), the adsorption device (6) and the condensed water filtering device (7) are simultaneously switched to the numbers of the filter cartridge, the resin cartridge and the filter cartridge 2, a new period is started, and the number of the filter cartridge is started again from the number 1 until the corresponding number 10 is switched.
7. The continuous online dioxin sampling device according to claim 6, characterized in that when the dioxin trapped and adsorbed in the filter cartridge, the resin cartridge, or the filter cartridge is saturated, that is, one sampling period, the control system (9) can control the time of each period, and the time of each period can be controlled to be 1 to 15 days according to the values of sampling flow rate, particulate matter concentration in flue gas, and the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920462383.2U CN209961552U (en) | 2019-04-10 | 2019-04-10 | Continuous online dioxin sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920462383.2U CN209961552U (en) | 2019-04-10 | 2019-04-10 | Continuous online dioxin sampling device |
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| Publication Number | Publication Date |
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| CN209961552U true CN209961552U (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920462383.2U Expired - Fee Related CN209961552U (en) | 2019-04-10 | 2019-04-10 | Continuous online dioxin sampling device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883777A (en) * | 2019-04-10 | 2019-06-14 | 盛守祥 | Trace organic substance sample continuous collecting apparatus in a kind of flue gas |
| CN111175093A (en) * | 2020-01-22 | 2020-05-19 | 暨南大学 | Portable air dioxin sampling device and method based on membrane adsorption |
-
2019
- 2019-04-10 CN CN201920462383.2U patent/CN209961552U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883777A (en) * | 2019-04-10 | 2019-06-14 | 盛守祥 | Trace organic substance sample continuous collecting apparatus in a kind of flue gas |
| CN111175093A (en) * | 2020-01-22 | 2020-05-19 | 暨南大学 | Portable air dioxin sampling device and method based on membrane adsorption |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200117 |