CN219964475U - Device for removing escaped ammonia in hazardous waste incineration flue gas by utilizing citric acid - Google Patents
Device for removing escaped ammonia in hazardous waste incineration flue gas by utilizing citric acid Download PDFInfo
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- CN219964475U CN219964475U CN202321220003.7U CN202321220003U CN219964475U CN 219964475 U CN219964475 U CN 219964475U CN 202321220003 U CN202321220003 U CN 202321220003U CN 219964475 U CN219964475 U CN 219964475U
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- China
- Prior art keywords
- citric acid
- injector
- powder
- tower
- lime
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 title claims abstract description 126
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 239000003546 flue gas Substances 0.000 title claims abstract description 16
- 238000004056 waste incineration Methods 0.000 title claims abstract description 13
- 239000002920 hazardous waste Substances 0.000 title claims description 8
- 239000000843 powder Substances 0.000 claims abstract description 44
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000007921 spray Substances 0.000 claims abstract description 28
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 25
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 25
- 239000004571 lime Substances 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 238000010791 quenching Methods 0.000 claims abstract description 18
- 230000000171 quenching effect Effects 0.000 claims abstract description 17
- 239000000428 dust Substances 0.000 claims abstract description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 239000003513 alkali Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 16
- 239000002699 waste material Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 4
- 239000008399 tap water Substances 0.000 claims description 4
- 235000020679 tap water Nutrition 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 239000003518 caustics Substances 0.000 claims 1
- 239000002912 waste gas Substances 0.000 abstract description 29
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 abstract description 9
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 9
- 239000002923 metal particle Substances 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 239000002253 acid Substances 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 230000002378 acidificating effect Effects 0.000 description 5
- BWKOZPVPARTQIV-UHFFFAOYSA-N azanium;hydron;2-hydroxypropane-1,2,3-tricarboxylate Chemical compound [NH4+].OC(=O)CC(O)(C(O)=O)CC([O-])=O BWKOZPVPARTQIV-UHFFFAOYSA-N 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 3
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
A device for removing escaped ammonia in dangerous waste incineration flue gas by using citric acid comprises a quenching tower, dry reaction equipment, a bag-type dust remover, a wet deacidification tower, a drainage fan, a spray gun, a citric acid injector, a powder activated carbon injector and a powder lime injector; the rapid cooling tower, the dry reaction equipment, the bag-type dust remover, the wet deacidification tower, the drainage fan, the spray gun, the citric acid injector, the powder activated carbon injector and the powder lime injector are installed together. This novel quench tower can cool off waste gas, citric acid sprayer, powder active carbon sprayer, powder lime sprayer spun citric acid, active carbon and lime powder can effectively with escape ammonia, dioxin and heavy metal particle, acid material reaction in the waste gas, generate innocuous material, in the bag collector handles back waste gas reentrant wet process deacidification tower, remaining spent acid can obtain further processing in the waste gas, then discharge waste gas innocuousness, reduced the pollution probability to the air.
Description
Technical Field
The utility model relates to the technical field of waste gas treatment auxiliary equipment, in particular to a device for removing escaped ammonia in dangerous waste incineration flue gas by using citric acid.
Background
In chemical manufacturers and the like, various wastes are generally treated by incineration through a waste burner in order to reduce pollution of waste liquid or waste residue to the environment. In the conventional flue gas purification process of hazardous waste incineration, waste gas treatment equipment matched with a waste combustor is usually SNCR (selective non-catalytic reduction) process, and NOx (nitrogen oxide) is reduced into N2 (nitrogen) and then discharged to the atmosphere by spraying ammonia water or urea into high-temperature flue gas at 850-900 ℃ so as to reduce the pollution to the environment; among them, for the ultra low emission area where the requirements are more stringent, the exhaust gas treatment device generally adopts an SCR (selective catalytic reduction) process, and further reduces the emission value of NOx by using a catalyst.
However, in practical situations, the efficiency of treating exhaust gas of SNCR and SCR is limited by the mixing degree of ammonia or urea and flue gas, residence time, reaction temperature, and insufficient and excessive ammonia or urea used, so that the flue gas often contains unreacted ammonia (the part of ammonia is usually called escaping ammonia) and is discharged to the atmosphere to pollute the environment. In other words, the existing waste gas treatment equipment cannot effectively remove dioxin, other heavy metals and acidic substances in waste gas, and the substances are directly discharged to the atmosphere to pollute the air. In summary, it is particularly necessary to provide a device that can be used in conjunction with an exhaust gas treatment device to effectively remove escaping ammonia and other environmentally hazardous substances.
Disclosure of Invention
In order to overcome the defect that the waste gas treatment equipment used by the existing waste burner cannot effectively treat escaped ammonia in waste gas, dioxin, other heavy metals and acidic substances and cause pollution to air due to the limited structure, the utility model provides a device for removing escaped ammonia in dangerous waste incineration flue gas by utilizing citric acid, which can effectively remove escaped ammonia, can remove dioxin, other heavy metals and acidic substances under the combined action of related mechanisms, and reduces environmental pollution caused by direct discharge of various harmful substances to the atmosphere.
The technical scheme adopted for solving the technical problems is as follows:
a device for removing escaped ammonia in dangerous waste incineration flue gas by using citric acid comprises a quenching tower, dry reaction equipment, a bag-type dust remover, a wet deacidification tower, a drainage fan, a spray gun, a citric acid injector, a powder activated carbon injector and a powder lime injector; the spray gun is characterized by comprising a plurality of spray heads and connecting pipes, wherein the upper water inlet pipes of the spray heads are respectively arranged at the lower ends of the connecting pipes at intervals, the connecting pipes are arranged at the upper ends in the quenching towers, and the side ends of the connecting pipes are connected with tap water pipes; an air inlet pipe at one side of the upper end of the quenching tower is connected with an air outlet pipe of the waste combustor, an air outlet pipe A at the other side of the quenching tower is arranged together with an air inlet pipe A of dry reaction equipment, and an air outlet pipe B of the dry reaction equipment is arranged together with an air inlet pipe B of the bag-type dust remover; the citric acid injector, the powder activated carbon injector and the powder lime injector are respectively arranged on the frame, and the injection heads of the citric acid injector, the powder activated carbon injector and the powder lime injector are annularly distributed and arranged in the middle part in the dry reaction equipment; the exhaust pipe C of the bag-type dust collector is connected with the air inlet pipe C of the wet deacidification tower through a screw and a nut, the exhaust pipe D of the wet deacidification tower is connected with the air inlet pipe D of the drainage fan, and the exhaust pipe E of the drainage fan is connected with the air inlet pipe E of the chimney; the wet deacidification tower is matched with an alkali liquor tank and an alkali liquor pump, the alkali liquor tank is arranged on the frame, a spray head A is arranged at the inner upper end of the wet deacidification tower, a liquid inlet pipe connected with the spray head A is connected with a liquid outlet pipe of the alkali liquor pump, and the liquid inlet pipe A of the alkali liquor pump is connected with the liquid outlet pipe A of the alkali liquor tank.
Further, the citric acid injector, the powder activated carbon injector and the powder lime injector are respectively filled with citric acid, activated carbon powder and lime powder.
Further, the alkali liquor tank is filled with sodium hydroxide solution.
Further, the included angle between the direction of the spray head of the citric acid sprayer and the installation angle in the wet deacidification tower is 30-45 degrees.
Further, the dry reaction apparatus is of an S-type structure.
The utility model has the beneficial effects that: when the novel waste gas treatment device is used, the quenching tower can cool waste gas exhausted by waste gas treatment devices, the temperature requirement of waste gas treatment by the post-treatment devices is met, citric acid, activated carbon powder and lime powder which are sprayed out by the citric acid injector, the powder activated carbon injector and the powder lime injector can effectively react with acid substances such as escaping ammonia, dioxin, heavy metal particles, hydrogen chloride, hydrogen fluoride and the like in the waste gas, harmless citric acid ammonia and salt powder are generated, dioxin and heavy metal particles are cleared out, waste gas after being treated by the bag-type dust remover enters the wet deacidification tower, after the effect of sodium hydroxide, residual waste acid in the waste gas can be further treated, and then the waste gas is discharged in a harmless manner, so that the probability of pollution to air is reduced. Based on the above-mentioned that, the novel method has good application prospect.
Drawings
The utility model will be further described with reference to the drawings and examples.
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Detailed Description
The device for removing escaped ammonia in hazardous waste incineration flue gas by utilizing citric acid is shown in fig. 1, and comprises a quenching tower 1, dry reaction equipment 2, a bag-type dust remover 3 (the prior art is not described in detail on the working principle of the device), a wet deacidification tower 4, a drainage fan 5 (the prior art is not described in detail on the working principle of the device), a spray gun, a citric acid injector (the prior art is not described in detail on the working principle of the device), a powder activated carbon injector (the prior art is not described in detail on the working principle of the device), and a powder lime injector (the prior art is not described in detail on the working principle of the device); the spray gun comprises three spray heads 61 and a connecting pipe 62, wherein the upper water inlet pipes of the three spray heads 61 are respectively arranged at the lower end of the annular connecting pipe 62 at certain intervals, a branch pipe communicated with the inside of the connecting pipe is welded at the rear end of the connecting pipe 62, the connecting pipe 62 is horizontally welded at the inner upper end of the quenching tower 1, the branch pipe is led out outwards through an opening at the rear upper end of the quenching tower 1 (welded and sealed between the branch pipe and the opening), and the branch pipe is positioned at the outer end part of the quenching tower and connected with a tap water pipe (not shown in the figure) through a pipeline; the left upper end air inlet pipe of the quenching tower 1 is connected with the air outlet pipe of the waste combustor through a pipeline, the right side air outlet pipe A of the lower end of the quenching tower 1 is installed with the air inlet pipe A of the left lower side of the dry reaction equipment 2 through a screw nut, and the right upper end air outlet pipe B of the dry reaction equipment 2 is installed with the air inlet pipe B of the bag-type dust remover 3 through a screw nut; the citric acid injector (not shown in the figure), the powder activated carbon injector (not shown in the figure) and the powder lime injector (not shown in the figure) are arranged on a rear side end frame (not shown in the figure) of the dry reaction equipment, and an injection head 7 of the citric acid injector, an injection head 8 of the powder activated carbon injector and an injection head 9 of the powder lime injector are annularly arranged in the middle of the dry reaction equipment 2; the exhaust pipe C of the bag-type dust collector 3 is connected with the upper air inlet pipe C of the wet deacidification tower 4 through a screw nut, and the exhaust pipe D of the wet deacidification tower 4 is connected with the air inlet pipe D of the drainage fan 5 through the screw nut. The exhaust pipe E of the drainage fan 5 is connected with the air inlet pipeline E of the chimney 10 through a screw nut; the wet deacidification tower 4 is matched with an alkali liquor box (not shown in the drawing) and an alkali liquor pump (not shown in the drawing), the alkali liquor box is arranged on the ground at the rear side end of the wet deacidification tower 4, the spray head A11 is arranged at the upper end in the wet deacidification tower 4, a liquid inlet pipe connected with the spray head A11 is led out outwards through a hole (sealed with a hole combining part) in the middle of the rear side end of the wet deacidification tower 4, a liquid outlet pipe at the lower end of the alkali liquor box is connected with a liquid inlet pipe of the alkali liquor pump through a pipeline connector, and a liquid outlet pipe of the alkali liquor pump is connected with a liquid inlet pipe of the spray head A11 through a pipeline connector.
As shown in fig. 1, the citric acid injector, the powdered activated carbon injector, and the powdered lime injector are respectively charged with citric acid, ultrafine activated carbon powder, and ultrafine lime powder. The alkali liquor box is filled with sodium hydroxide solution with the concentration of thirty percent. The included angle between the direction of the spray head 7 of the citric acid sprayer and the installation angle in the wet deacidification tower is 30-45 degrees. The dry reaction equipment is of an S-shaped structure.
As shown in fig. 1, when the novel device works, after the waste gas (about 550 ℃) discharged by the waste gas burner in the previous working procedure enters the quenching tower 1, tap water with pressure is sprayed out through the lower ends of the three spray heads 61, the temperature of the entering waste gas is reduced to 180 ℃, and the temperature requirements of the waste gas treatment by the citric acid injector, the powder activated carbon injector and the powder lime injector of the post-treatment equipment are met (the ammonium citrate generated later can be decomposed into ammonia and citric acid at the temperature of more than 190 ℃, so that the ammonium citrate can be ensured not to be decomposed into ammonia and citric acid again after the ammonia is removed at the temperature of 180 ℃); the atomized citric acid, the activated carbon powder and the lime powder sprayed by the spray heads of the citric acid sprayer 7, the powder activated carbon sprayer 8 and the powder lime sprayer 9 can effectively react with escaped ammonia, dioxin, heavy metal particles, hydrogen chloride, hydrogen fluoride and other acidic substances in the waste gas to respectively generate harmless citric acid ammonia (the citric acid and the escaped ammonia generate the ammonium citrate which is harmless to the environment), salt powder (the lime powder, the hydrogen chloride, the hydrogen fluoride, sulfur dioxide and other generated salt powder in the waste gas) and the salt powder, the dioxin and the heavy metal particles are removed (the activated carbon powder absorbs the dioxin, the heavy metal particles and the like in the waste gas), the waste gas after treatment enters the bag-type dust remover 3, the waste gas after treatment of the bag-type dust remover 3 enters the wet deacidification tower 4, and the alkaline liquid pump of the wet deacidification tower 4 pumps the sodium hydroxide solution in the alkaline liquid tank out through the spray nozzle at the lower end of the spray head A11 to spray the atomized sodium hydroxide, so that the residual acidic substances in the waste gas and the sodium hydroxide react fully to form the salt powder. Then the exhaust gas is pumped out by the drainage fan 5 and discharged through the chimney 10 in a harmless way, so that the pollution probability to the air is reduced
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are merely illustrative of the principles of the present utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. A device for removing escaped ammonia in dangerous waste incineration flue gas by using citric acid comprises a quenching tower, dry reaction equipment, a bag-type dust remover, a wet deacidification tower, a drainage fan, a spray gun, a citric acid injector, a powder activated carbon injector and a powder lime injector; the spray gun is characterized by comprising a plurality of spray heads and connecting pipes, wherein the upper water inlet pipes of the spray heads are respectively arranged at the lower ends of the connecting pipes at intervals, the connecting pipes are arranged at the upper ends in the quenching towers, and the side ends of the connecting pipes are connected with tap water pipes; an air inlet pipe at one side of the upper end of the quenching tower is connected with an air outlet pipe of the waste combustor, an air outlet pipe A at the other side of the quenching tower is arranged together with an air inlet pipe A of dry reaction equipment, and an air outlet pipe B of the dry reaction equipment is arranged together with an air inlet pipe B of the bag-type dust remover; the citric acid injector, the powder activated carbon injector and the powder lime injector are respectively arranged on the frame, and the injection heads of the citric acid injector, the powder activated carbon injector and the powder lime injector are annularly distributed and arranged in the middle part in the dry reaction equipment; the exhaust pipe C of the bag-type dust collector is connected with the air inlet pipe C of the wet deacidification tower through a screw and a nut, the exhaust pipe D of the wet deacidification tower is connected with the air inlet pipe D of the drainage fan, and the exhaust pipe E of the drainage fan is connected with the air inlet pipe E of the chimney; the wet deacidification tower is matched with an alkali liquor tank and an alkali liquor pump, the alkali liquor tank is arranged on the frame, a spray head A is arranged at the inner upper end of the wet deacidification tower, a liquid inlet pipe connected with the spray head A is connected with a liquid outlet pipe of the alkali liquor pump, and the liquid inlet pipe A of the alkali liquor pump is connected with the liquid outlet pipe A of the alkali liquor tank.
2. The apparatus for removing escaped ammonia from hazardous waste incineration flue gas using citric acid according to claim 1, wherein the citric acid injector, the powdered activated carbon injector and the powdered lime injector are respectively filled with citric acid, activated carbon powder and lime powder.
3. The device for removing escaped ammonia from hazardous waste incineration flue gas by using citric acid according to claim 1, wherein the caustic tank is filled with sodium hydroxide solution.
4. The device for removing escaped ammonia from hazardous waste incineration flue gas by using citric acid according to claim 1, wherein the included angle between the direction of the spraying head of the citric acid sprayer and the installation angle in the wet deacidification tower is 30-45 degrees.
5. The apparatus for removing escaped ammonia from hazardous waste incineration flue gas by using citric acid according to claim 1, wherein the dry reaction equipment has an S-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321220003.7U CN219964475U (en) | 2023-05-19 | 2023-05-19 | Device for removing escaped ammonia in hazardous waste incineration flue gas by utilizing citric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321220003.7U CN219964475U (en) | 2023-05-19 | 2023-05-19 | Device for removing escaped ammonia in hazardous waste incineration flue gas by utilizing citric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219964475U true CN219964475U (en) | 2023-11-07 |
Family
ID=88593116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321220003.7U Active CN219964475U (en) | 2023-05-19 | 2023-05-19 | Device for removing escaped ammonia in hazardous waste incineration flue gas by utilizing citric acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219964475U (en) |
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2023
- 2023-05-19 CN CN202321220003.7U patent/CN219964475U/en active Active
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