CN117695806A - Heavy metal removal system for flue gas - Google Patents
Heavy metal removal system for flue gas Download PDFInfo
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- CN117695806A CN117695806A CN202311627186.9A CN202311627186A CN117695806A CN 117695806 A CN117695806 A CN 117695806A CN 202311627186 A CN202311627186 A CN 202311627186A CN 117695806 A CN117695806 A CN 117695806A
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- heavy metal
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- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 107
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 239000003546 flue gas Substances 0.000 title claims abstract description 105
- 239000002245 particle Substances 0.000 claims abstract description 130
- 238000001179 sorption measurement Methods 0.000 claims abstract description 96
- 238000002156 mixing Methods 0.000 claims abstract description 92
- 239000003463 adsorbent Substances 0.000 claims abstract description 76
- 239000010881 fly ash Substances 0.000 claims abstract description 49
- 239000002994 raw material Substances 0.000 claims abstract description 31
- 230000008929 regeneration Effects 0.000 claims abstract description 25
- 238000011069 regeneration method Methods 0.000 claims abstract description 25
- 239000003607 modifier Substances 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims description 39
- 230000004048 modification Effects 0.000 claims description 28
- 238000012986 modification Methods 0.000 claims description 28
- 238000001035 drying Methods 0.000 claims description 15
- 239000006148 magnetic separator Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 6
- 230000001172 regenerating effect Effects 0.000 claims description 6
- 230000008676 import Effects 0.000 claims 3
- 238000003795 desorption Methods 0.000 claims 1
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000000197 pyrolysis Methods 0.000 description 8
- 230000005389 magnetism Effects 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000001568 sexual effect Effects 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
Abstract
The invention provides a flue gas heavy metal removal system, and relates to the technical field of coal-fired flue gas pollution control. The flue gas heavy metal removal system includes: the storage bin is used for storing the adsorption raw materials; a storage tank for storing a modifier; the modified mixing chamber is used for mixing the adsorption raw materials and the modifying agent to form a magnetic adsorbent and outputting the magnetic adsorbent; the cyclone separator can separate and convey mixed particles formed by mixing fly ash particles and adsorption particles in the flue gas to the sorting device; the separation device is used for receiving and separating fly ash particles and adsorption particles in the mixed particles; the temperature control device is used for pyrolyzing fly ash particles; and the regeneration device is used for removing heavy metals in the adsorption particles. The flue gas heavy metal removal system reduces the operation cost and solves the problem of high cost of removing heavy metals in flue gas in the prior art.
Description
Technical Field
The invention relates to the technical field of coal-fired flue gas pollution control, in particular to a flue gas heavy metal removal system.
Background
Coal releases various pollutants during combustion, such as nitrogen oxides, sulfur oxides, dust particles, heavy metals, and large amounts of carbon dioxide. It is well known that the heavy metals in flue gas are very numerous but relatively low in content, and heavy metals including mercury, arsenic, lead, cadmium, selenium, nickel and the like are generally called trace elements, and the trace elements are discharged into the natural environment to cause great harm to human health. In the process of removing heavy metals, a great deal of charcoal is required, and the cost of removing heavy metals is increased, so that a device capable of solving the current problems is needed.
Disclosure of Invention
The embodiment of the invention aims to provide a flue gas heavy metal removal system which is used for solving the problem of high cost for removing heavy metals in flue gas in the prior art.
In order to achieve the above object, the present invention provides a heavy metal removal system for flue gas, which is connected to a cyclone separator and is used for removing heavy metals in flue gas entering the cyclone separator, the heavy metal removal system for flue gas comprises:
the storage bin is used for storing the adsorption raw materials;
a storage tank for storing a modifier;
the modified mixing chamber is communicated with the storage bin and the storage tank, and is used for mixing the adsorption raw materials and the modifying agent to form a magnetic adsorbent and outputting the magnetic adsorbent;
the spraying device is connected with the sexual mixing chamber and the cyclone separator and is used for spraying a magnetic adsorbent into the cyclone separator, the magnetic adsorbent adsorbs heavy metals in the flue gas to form adsorption particles, and the cyclone separator can separate and convey mixed particles formed by mixing fly ash particles and adsorption particles in the flue gas to the sorting device;
the separation device is connected with the cyclone separator and is used for receiving and separating fly ash particles and adsorption particles in the mixed particulate matters;
the temperature control device is respectively connected with the sorting device and the storage bin, and is used for pyrolyzing the fly ash particles and sending the pyrolyzed fly ash particles into the storage bin as adsorption raw materials;
and the regeneration device is connected with the sorting device and the spraying device and is used for removing heavy metals in the adsorption particles and sending the adsorption particles with the heavy metals removed into the spraying device as magnetic adsorbents.
Specifically, the flue gas heavy metal removal system further comprises: and the drying device is arranged between the modification mixing chamber and the spraying device and is used for drying the magnetic adsorbent output by the modification mixing chamber.
Specifically, the modified mixing chamber includes: the stirring device comprises a mixing box, a stirring rod and a mixing conveying pump;
the mixing box is connected with the storage bin, the storage tank and the drying device and is used for receiving the adsorption raw materials and the modifier;
the stirring rod is arranged in the mixing box and is used for mixing the adsorption raw materials and the modifier to form a magnetic adsorbent;
the mixing and conveying pump is arranged in the mixing box and used for conveying the magnetic adsorbent to the drying device.
Specifically, the spraying device comprises: a storage box and a spraying machine;
the storage box is provided with a feed inlet and a discharge outlet, the feed inlet is connected with the modification mixing chamber, the discharge outlet is connected with the feed inlet of the cyclone separator, and the storage box is used for storing the magnetic adsorbent from the modification mixing chamber;
the material spraying machine is arranged at the discharge port of the storage box and is used for spraying the magnetic adsorbent discharged from the discharge port of the storage box into the cyclone separator.
Specifically, the flue gas heavy metal removal system further comprises: the mixing pipe section is provided with a flue gas inlet, an adsorbent inlet and a mixing outlet, the discharge port of the storage box is connected with the adsorbent inlet, the mixing outlet is connected with the feed inlet of the cyclone separator, flue gas enters the cyclone separator from the flue gas inlet through the mixing pipe section, and the magnetic adsorbent discharged from the discharge port of the storage box is sprayed into the cyclone separator through the mixing pipe section by the sprayer.
Specifically, the flue gas heavy metal removal system further comprises: and the heavy metal recovery device is connected with the regeneration device and is used for recovering the heavy metal removed from the adsorption particles.
Specifically, the modifier is NH 4 Br、FeCl 2 ∙4H 2 O and FeCl 3 ∙6H 2 O.
Specifically, the sorting apparatus includes: a magnetic separator, a first collection assembly and a second collection assembly;
the magnetic separator is connected with the cyclone separator and is used for receiving the mixed particulate matters separated by the cyclone separator and separating fly ash particles and adsorption particles in the mixed particulate matters;
the first collecting assembly is connected with the magnetic separator and the temperature control device and is used for receiving fly ash particles and conveying the fly ash particles to the temperature control device;
the second collecting assembly is connected with the magnetic separator and the regenerating device and is used for receiving the adsorption particles and conveying the adsorption particles to the regenerating device.
Specifically, the flue gas heavy metal removal system further comprises: the spiral feeder is arranged between the storage bin and the modification mixing chamber and is used for conveying the adsorption raw materials discharged from the discharge hole of the storage bin into the modification mixing chamber.
Specifically, the flue gas heavy metal removal system further comprises: and the hot gas supply device is communicated with the regeneration device and is used for supplying hot air into the regeneration device.
According to the flue gas heavy metal removal system provided by the invention, the adsorption raw materials and the modifying agent are mixed to form the magnetic adsorbent with magnetism through the modification mixing chamber, the magnetic adsorbent is sprayed into the cyclone separator through the spraying device to be mixed with flue gas entering the cyclone separator, the magnetic adsorbent can adsorb heavy metals in the flue gas to form adsorption particles, the flue gas also contains fly ash particles, the cyclone separator can separate mixed particles formed by mixing the fly ash particles and the adsorption particles in the flue gas, the separation device receives and separates the fly ash particles and the adsorption particles in the mixed particles, so that the fly ash particles and the adsorption particles are completely separated, the fly ash particles can be stored into the storage bin as the adsorption raw materials after pyrolysis treatment of the temperature control device, and the separated adsorption particles can be used as the magnetic adsorbent to be sent into the spraying device again after heavy metals are removed through the regeneration device, and are sprayed into the cyclone separator again through the spraying device to remove heavy metals in the flue gas.
The system for removing the heavy metals in the flue gas provided by the invention not only removes the heavy metals in the flue gas, but also causes the fly ash particles separated from the flue gas to become adsorption raw materials through pyrolysis treatment, and can be used as a magnetic adsorbent to be reused in the removal work of the heavy metals in the flue gas after the heavy metals are removed from the adsorption particles separated from the flue gas through a regeneration device, thereby reducing the running cost, solving the problem of high cost for removing the heavy metals in the flue gas in the prior art, and avoiding pollution.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the embodiments of the invention. In the drawings:
fig. 1 is a schematic layout diagram of a flue gas heavy metal removal system provided by the invention.
Description of the reference numerals
1-a cyclone separator; 2-a storage bin; 3-a storage tank; 4-a modified mixing chamber; 5-spraying device; 6-sorting device; 7-a temperature control device; 8-a regeneration device; 9-a drying device; 10-screw feeder; 11-a mixing tube section; 12-heavy metal recovery device; 31-a medicament pump; 41-a mixing box; 51-a storage box; 52-a spraying machine; 61-a magnetic separator; 62-a first collection assembly; 63-a second collection assembly.
Detailed Description
The following describes the detailed implementation of the embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Fig. 1 is a schematic layout of a flue gas heavy metal removal system. As shown in fig. 1, the heavy metal removing system for flue gas provided by the invention is connected with a cyclone separator 1 and is used for removing heavy metals in flue gas entering the cyclone separator 1, and the heavy metal removing system for flue gas comprises:
a storage bin 2 for storing the adsorption raw material;
a storage tank 3 for storing a modifier;
a modification mixing chamber 4, which is communicated with the storage bin 2 and the storage tank 3, and is used for mixing the adsorption raw materials and the modifier to form a magnetic adsorbent, and outputting the magnetic adsorbent;
the spraying device 5 is connected with the sexual mixing chamber 4 and the cyclone separator 1 and is used for spraying a magnetic adsorbent into the cyclone separator 1, the magnetic adsorbent adsorbs heavy metals in the flue gas to form adsorption particles, and the cyclone separator 1 can separate and convey mixed particles formed by mixing fly ash particles and adsorption particles in the flue gas to the sorting device 6;
the sorting device 6 is connected with the cyclone separator 1 and is used for receiving and sorting out fly ash particles and adsorption particles in the mixed particulate matters;
the temperature control device 7 is respectively connected with the sorting device 6 and the storage bin 2, and is used for pyrolysis treatment of the fly ash particles and sending the pyrolyzed fly ash particles into the storage bin 2 as adsorption raw materials;
and the regeneration device 8 is connected with the sorting device 6 and the spraying device 5 and is used for removing the heavy metals in the adsorption particles and sending the adsorption particles with the heavy metals removed into the spraying device 5 as a magnetic adsorbent.
According to the flue gas heavy metal removal system provided by the invention, the adsorbent raw materials in the storage bin 2 and the modifier in the storage tank 3 are sent into the modification mixing chamber 4 to be mixed to form the magnetic adsorbent, the magnetic adsorbent is sprayed into the cyclone separator 1 through the spraying device 5 to be mixed with flue gas entering the cyclone separator 1, the magnetic adsorbent can adsorb heavy metals in the flue gas, the magnetic adsorbent for adsorbing heavy metals becomes adsorption particles, the flue gas entering the cyclone separator 1 contains the adsorption particles besides the fly ash particles conventionally contained, the mixed particles formed by mixing the fly ash particles and the adsorption particles are separated through the cyclone separator 1, the fly ash particles and the adsorption particles in the mixed particles are completely separated through the sorting device 6, the moisture in the fly ash particles is removed after pyrolysis treatment of the temperature control device 7, meanwhile, the pore structure of the fly ash particles is more abundant after pyrolysis treatment, the subsequent modification and the promotion of the adsorption capacity are facilitated, the heavy metals in the adsorption particles are removed after regeneration treatment of the separated adsorption particles, the adsorption particles are reduced again to become adsorption particles, the heavy metals in the adsorption particles can be removed, the heavy metals can be greatly reduced to be removed from the flue gas, the heavy metals in the flue gas can be removed, the heavy metal can be greatly reduced, the cost is reduced, and the heavy metal in the flue gas can be removed from the flue gas by the flue gas is greatly reduced, and the heavy metal in the flue gas can be removed by the heavy metal in the flue gas, and the flue gas can be greatly removed by the heavy metal in the flue gas, and the flue gas can be removed by the heavy metal.
In order to facilitate the subsequent injection of the magnetic adsorbent, the flue gas heavy metal removal system further comprises: and the drying device 9 is arranged between the modification mixing chamber 4 and the spraying device 5 and is used for drying the magnetic adsorbent output by the modification mixing chamber 4. The magnetic adsorbent contains a small amount of water, the small amount of water easily causes the magnetic adsorbent particles to form a liquid bridge, so that the magnetic adsorbent particles are agglomerated, the follow-up spraying of the magnetic adsorbent into the cyclone separator 1 is unfavorable for heavy metal adsorption, the magnetic adsorbent is dried by the drying device 9 before being sent into the cyclone separator 1, and the water in the magnetic adsorbent is evaporated, so that the magnetic adsorbent is looser and is convenient to spray.
For the convenience of mixing the adsorption raw material and the modifying agent, the modifying mixing chamber 4 includes: a mixing tank 41, a stirring rod, and a mixing transfer pump;
the mixing box 41 is connected with the storage bin 2, the storage tank 3 and the drying device 9 and is used for receiving adsorption raw materials and modifiers;
the stirring rod is arranged in the mixing box 41 and is used for mixing the adsorption raw materials and the modifier to form a magnetic adsorbent;
the mixing and conveying pump is arranged in the mixing box 41 and is used for conveying the magnetic adsorbent to the drying device 9.
The flue gas heavy metal removal system further comprises: a screw feeder 10 provided between the storage bin 2 and the modification mixing chamber 4 for feeding the adsorption raw material discharged from the discharge port of the storage bin 2 into the modification mixing chamber 4.
As shown in fig. 1, the adsorption raw material is discharged from the discharge port of the storage bin 2, the adsorption raw material is conveyed into the mixing box 41 of the modification mixing chamber 4 by the screw feeder 10, the modifier in the storage tank 3 is pumped into the mixing box 41 by the agent pump 31, and the modifier is NH 4 Br、FeCl 2 ∙4H 2 O and FeCl 3 ∙6H 2 O, the adsorbent material and the modifier entering the mixing box 41 are sufficiently mixed under the action of the stirring rod to form a magnetic adsorbent with magnetism, and then the magnetic adsorbent is sent into the drying device 9 by the mixing and conveying pump to be dried.
In one embodiment, as shown in fig. 1, the spraying device 5 includes: a storage box 51 and a sprayer 52;
the storage box 51 is provided with a feed port and a discharge port, the feed port is connected with the modification mixing chamber 4, the discharge port is connected with the feed port of the cyclone separator 1, and the storage box 51 is used for storing the magnetic adsorbent from the modification mixing chamber 4;
the material spraying machine 52 is arranged at the discharge port of the storage tank 51, and is used for spraying the magnetic adsorbent discharged from the discharge port of the storage tank 51 into the cyclone separator 1.
The flue gas heavy metal removal system further comprises: the mixing pipe section 11 is provided with a flue gas inlet, an adsorbent inlet and a mixing outlet, the discharge hole of the storage box 51 is connected with the adsorbent inlet, the mixing outlet is connected with the feed inlet of the cyclone separator 1, flue gas enters the cyclone separator 1 from the flue gas inlet through the mixing pipe section 11, and the magnetic adsorbent discharged from the discharge hole of the storage box 51 is sprayed into the cyclone separator 1 through the mixing pipe section 11 by the sprayer 52.
The material spraying machine 52 is a Roots blower and is arranged at the discharge port of the storage box 51, the material spraying machine 52 can supply air into the mixing pipe section 11, the mixing pipe section 11 is arranged between the discharge port of the storage box 51 and the feed port of the cyclone separator 1, the magnetic adsorbent discharged from the discharge port of the storage box 51 enters the mixing pipe section 11 and then advances to the feed port of the cyclone separator 1 under the carrying of wind sent out by the material spraying machine 52, in order to enable the flue gas to be better mixed with the magnetic adsorbent, the flue gas enters the cyclone separator 1 through the mixing pipe section 11, and thus the flue gas is mixed with the magnetic adsorbent in the mixing pipe section 11 before entering the cyclone separator 1, the mixing path of the flue gas and the magnetic adsorbent is prolonged, the magnetic adsorbent is convenient for better adsorbing heavy metals in the flue gas, and the adsorption particles adsorbed with heavy metals are formed before the flue gas and the magnetic adsorbent enter the cyclone separator 1, and the fly ash particles and the adsorption particles in the flue gas can be separated out by the cyclone separator 1.
After the heavy metal in the adsorption particles is removed by the regenerating device 8, in order to avoid the heavy metal polluting the environment, the flue gas heavy metal removing system further comprises: and a heavy metal recovery device 12 connected to the regeneration device 8 for recovering the heavy metal removed from the adsorption particles.
The flue gas heavy metal removal system further comprises: and a hot air supply device communicated with the regeneration device 8 for supplying hot air into the regeneration device 8.
In order to enable the regeneration device 8 to remove heavy metals in the adsorption particles, after the adsorption particles enter the regeneration device 8, hot air is supplied to the regeneration device 8 through a hot air supply device to heat the adsorption particles, the hot air brings out the heavy metals in the adsorption particles, so that the hot air contains a large amount of heavy metals, the hot air containing a large amount of heavy metals is sent into the heavy metal recovery device 12, the heavy metal recovery device 12 is a condensation recoverer, and heavy metal pollutants are recovered through the heavy metal turning device 12.
As shown in fig. 1, the sorting apparatus 6 includes: a magnetic separator 61, a first collection assembly 62 and a second collection assembly 63;
the magnetic separator 61 is connected with the cyclone separator 1, and is used for receiving the mixed particulate matters separated by the cyclone separator 1 and separating fly ash particles and adsorption particles in the mixed particulate matters;
the first collecting assembly 62 is connected to the magnetic separator 61 and the temperature control device 7, and is used for receiving fly ash particles and conveying the fly ash particles to the temperature control device 7;
the second collection assembly 63 is connected to the magnetic separator 61 and the regeneration device 8 for receiving the adsorbent particles and delivering the adsorbent particles to the regeneration device 8.
The cyclone separator 1 separates the fly ash particles and the adsorption particles in the flue gas, but the fly ash particles and the adsorption particles are mixed together, so that the subsequent recycling is not facilitated, the mixed particles formed by mixing the fly ash particles and the adsorption particles enter the magnetic separator 61, the adsorption particles contain magnetism, the fly ash particles are nonmagnetic, the fly ash particles and the adsorption particles can be separated through the magnetic separator 61, the separated fly ash particles are stored in the first collecting assembly 62, the separated adsorption particles are stored in the second collecting assembly 63, the fly ash particles stored in the first collecting assembly 61 are sent to the storage bin 2 to be stored as adsorption raw materials after pyrolysis treatment of the temperature control device 7, and the adsorption particles stored in the second collecting assembly 63 are sent to the regenerating device 8 to be regenerated, and the adsorption particles after the regeneration treatment remove heavy metals and can be used as magnetic adsorbents again to adsorb heavy metals in the flue gas.
According to the flue gas heavy metal removal system provided by the invention, the adsorption raw materials and the modifying agent are mixed to form the magnetic adsorbent with magnetism through the modification mixing chamber, the magnetic adsorbent is sprayed into the cyclone separator through the spraying device to be mixed with flue gas entering the cyclone separator, the magnetic adsorbent can adsorb heavy metals in the flue gas to form adsorption particles, the flue gas also contains fly ash particles, the cyclone separator can separate mixed particles formed by mixing the fly ash particles and the adsorption particles in the flue gas, the separation device receives and separates the fly ash particles and the adsorption particles in the mixed particles, so that the fly ash particles and the adsorption particles are completely separated, the fly ash particles can be stored into the storage bin as the adsorption raw materials after pyrolysis treatment of the temperature control device, and the separated adsorption particles can be used as the magnetic adsorbent to be sent into the spraying device again after heavy metals are removed through the regeneration device, and are sprayed into the cyclone separator again through the spraying device to remove heavy metals in the flue gas.
The system for removing the heavy metals in the flue gas provided by the invention not only removes the heavy metals in the flue gas, but also causes the fly ash particles separated from the flue gas to become adsorption raw materials through pyrolysis treatment, and can be used as a magnetic adsorbent to be reused in the removal work of the heavy metals in the flue gas after the adsorption particles separated from the flue gas are subjected to the treatment of removing the heavy metals through a regeneration device, thereby reducing the running cost, solving the problem of high cost of removing the heavy metals in the flue gas in the prior art, and avoiding pollution.
The foregoing details of the optional implementation of the embodiment of the present invention have been described in detail with reference to the accompanying drawings, but the embodiment of the present invention is not limited to the specific details of the foregoing implementation, and various simple modifications may be made to the technical solution of the embodiment of the present invention within the scope of the technical concept of the embodiment of the present invention, and these simple modifications all fall within the protection scope of the embodiment of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, various possible combinations of embodiments of the present invention are not described in detail.
In addition, any combination of various embodiments of the present invention may be performed, so long as the concept of the embodiments of the present invention is not violated, and the disclosure of the embodiments of the present invention should also be considered.
Claims (10)
1. A flue gas heavy metal removal system, characterized in that is connected with cyclone (1) for the heavy metal in the flue gas of desorption entering cyclone (1), flue gas heavy metal removal system includes:
a storage bin (2) for storing the adsorption raw material;
a storage tank (3) for storing a modifier;
a modified mixing chamber (4) communicated with the storage bin (2) and the storage tank (3) and used for mixing the adsorption raw materials and the modifying agent to form a magnetic adsorbent and outputting the magnetic adsorbent;
the spraying device (5) is connected with the modification mixing chamber (4) and the cyclone separator (1) and is used for spraying a magnetic adsorbent into the cyclone separator (1), the magnetic adsorbent adsorbs heavy metals in the flue gas to form adsorption particles, and the cyclone separator (1) can separate and convey mixed particles formed by mixing fly ash particles and adsorption particles in the flue gas to the sorting device (6);
the sorting device (6) is connected with the cyclone separator (1) and is used for receiving and sorting fly ash particles and adsorption particles in the mixed particulate matters;
the temperature control device (7) is respectively connected with the sorting device (6) and the storage bin (2) and is used for pyrolyzing the fly ash particles and sending the pyrolyzed fly ash particles into the storage bin (2) as adsorption raw materials;
and the regeneration device (8) is connected with the sorting device (6) and the spraying device (5) and is used for removing the heavy metals in the adsorption particles and sending the adsorption particles with the heavy metals removed into the spraying device (5) as a magnetic adsorbent.
2. The flue gas heavy metal removal system of claim 1, further comprising: and the drying device (9) is arranged between the modification mixing chamber (4) and the spraying device (5) and is used for drying the magnetic adsorbent output by the modification mixing chamber (4).
3. The flue gas heavy metal removal system according to claim 2, wherein the modification mixing chamber (4) comprises: a mixing box (41), a stirring rod and a mixing delivery pump;
the mixing box (41) is connected with the storage bin (2), the storage tank (3) and the drying device (9) and is used for receiving adsorption raw materials and modifiers;
the stirring rod is arranged in the mixing box (41) and is used for mixing the adsorption raw materials and the modifier to form a magnetic adsorbent;
the mixing and conveying pump is arranged in the mixing box (41) and is used for conveying the magnetic adsorbent to the drying device (9).
4. The flue gas heavy metal removal system according to claim 1, wherein the spraying device (5) comprises: a storage box (51) and a spraying machine (52);
the storage box (51) is provided with a feed inlet and a discharge outlet, the feed inlet is connected with the modification mixing chamber (4), the discharge outlet is connected with the feed inlet of the cyclone separator (1), and the storage box (51) is used for storing the magnetic adsorbent from the modification mixing chamber (4);
the spraying machine (52) is arranged at the discharge port of the storage box (51) and is used for spraying the magnetic adsorbent discharged from the discharge port of the storage box (51) into the cyclone separator (1).
5. The flue gas heavy metal removal system of claim 4, further comprising: mixing tube section (11), have flue gas import, adsorbent import and mixed export, the discharge gate of storage tank (51) with adsorbent access connection, mixed export with the feed inlet of cyclone (1) is connected, and flue gas is from the flue gas import through mixing tube section (11) entering cyclone (1), spout material machine (52) will certainly the magnetic adsorbent of discharge gate of storage tank (51) is passed through mixing tube section (11) spouts in cyclone (1).
6. The flue gas heavy metal removal system of claim 1, further comprising: and a heavy metal recovery device (12) connected with the regeneration device (8) and used for recovering the heavy metal removed from the adsorption particles.
7. The flue gas heavy metal removal system of claim 1, wherein the modifier is NH 4 Br、FeCl 2 ∙4H 2 O and FeCl 3 ∙6H 2 O.
8. The flue gas heavy metal removal system according to claim 1, wherein the sorting device (6) comprises: a magnetic separator (61), a first collection assembly (62) and a second collection assembly (63);
the magnetic separator (61) is connected with the cyclone separator (1) and is used for receiving the mixed particulate matters separated by the cyclone separator (1) and separating fly ash particles and adsorption particles in the mixed particulate matters;
the first collecting assembly (62) is connected with the magnetic separator (61) and the temperature control device (7) and is used for receiving fly ash particles and conveying the fly ash particles to the temperature control device (7);
the second collecting assembly (63) is connected with the magnetic separator (61) and the regenerating device (8) and is used for receiving adsorption particles and conveying the adsorption particles to the regenerating device (8).
9. The flue gas heavy metal removal system of claim 1, further comprising: the screw feeder (10) is arranged between the storage bin (2) and the modification mixing chamber (4) and is used for conveying the adsorption raw material discharged from the discharge hole of the storage bin (2) into the modification mixing chamber (4).
10. The flue gas heavy metal removal system of claim 1, further comprising: and the hot air supply device is communicated with the regeneration device (8) and is used for supplying hot air into the regeneration device (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311627186.9A CN117695806A (en) | 2023-11-30 | 2023-11-30 | Heavy metal removal system for flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311627186.9A CN117695806A (en) | 2023-11-30 | 2023-11-30 | Heavy metal removal system for flue gas |
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