CN105396458A - Waste heat low-temperature catalyzing and denitrating device for kiln gas - Google Patents
Waste heat low-temperature catalyzing and denitrating device for kiln gas Download PDFInfo
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- CN105396458A CN105396458A CN201510886744.2A CN201510886744A CN105396458A CN 105396458 A CN105396458 A CN 105396458A CN 201510886744 A CN201510886744 A CN 201510886744A CN 105396458 A CN105396458 A CN 105396458A
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- flue
- reaction tower
- temperature
- ammonia
- gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
- B01D53/885—Devices in general for catalytic purification of waste gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/12—Methods and means for introducing reactants
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a waste heat low-temperature catalyzing and denitrating device for kiln gas. The waste heat low-temperature catalyzing and denitrating device comprises a main flue, an auxiliary flue, an air compressor, a gas storage tank, a cloth bag dust remover, a denitrating reaction tower, an ammonia water spraying system, an induced draft fan and a PLC control system, wherein the cloth bag dust remover, the denitrating reaction tower and the ammonia water spraying system are all arranged on the main flue, an inlet of the cloth bag dust remover is communicated with the main flue, flue gas temperature treatment devices are arranged on the part, in front of and behind the cloth bag dust remover, on the flue, the cloth bag dust remover is communicated with the denitrating reaction tower through an ammonia spraying pipeline, the ammonia water spraying system is arranged in the ammonia spraying pipeline, and the main flue and the auxiliary flue are provided with control valves to be connected with the PLC control system. By means of the device, the temperature of flue gas of the cloth bag dust remover reaches 180 DEG C (the denitrating temperature) or above, energy consumption is reduced, the denitrating efficiency is improved, and the emission standard requirement is met.
Description
Technical field
The present invention relates to kiln exhaust gas processing device, be specially the low-temperature catalyzed denitrification apparatus of a kind of process kiln gas waste heat.
Background technology
During current domestic coal gas denitration of glass furnace fume, the different oxynitrides of ammonia reacts, need use catalyst and carry out at a certain temperature, and flue gas is reduced by temperature after sack cleaner, cannot reach reaction temperature, certain damage can be caused to sack cleaner simultaneously, affect the service life of deduster, energy consumption is high, and flue gas exhaust-gas treatment is undesirable, oxynitrides is caused to exceed standard, can not meet the requirement of environmental protection.
Summary of the invention
For solving the technical problem of above-mentioned existence, the invention provides a kind of reasonable in design, the low-temperature catalyzed denitrification apparatus of kiln gas waste heat that energy consumption is low, fume treatment is effective, utilize this device, the flue-gas temperature of sack cleaner reaches more than 180 DEG C (denitration temperature), thus raising denitration efficiency, meet discharge standard requirement.
For achieving the above object, the technical solution adopted in the present invention is:
The low-temperature catalyzed denitrification apparatus of a kind of kiln gas waste heat, it comprises flue collector, auxillary flue, air compressor machine, air accumulator, sack cleaner, denitration reaction tower, ammonia spray system, air-introduced machine, PLC control system, sack cleaner, denitration reaction tower, ammonia spray system is all arranged on flue collector, sack cleaner import is communicated with flue collector, flue is provided with flue-gas temperature treating apparatus before and after sack cleaner, sack cleaner is communicated with denitration reaction tower by spray ammonia pipeline, ammonia spray Operation system setting is in spray ammonia pipeline, the gas outlet of denitration reaction tower is connected with air-introduced machine, air-introduced machine is connected with chimney, chimney place is provided with flue gas inspection device and is connected with PLC control system, flue collector and auxillary flue are provided with control valve be connected with PLC control system, air compressor machine one end is communicated with air accumulator, the other end is connected with sack cleaner and out of stock reaction tower, main sack cleaner and the denitration reaction tower given provides source of the gas, temperature processing device is connected with PLC control system.
During normal operation, flue gas is all by flue collector, the flue gas in flue gas and nitrogen oxide is dropped to the standard that can discharge.When sack cleaner or denitration reaction tower break down, auxillary flue is opened, and flue collector, by auxillary flue, is closed by flue gas, maintenance sack cleaner or denitration reaction tower.Air compressor machine provides source of the gas mainly to sack cleaner and denitration reaction tower.
Described flue-gas temperature treating apparatus comprises heat exchanger and temperature sensor, is all connected with PLC control system, enters next road program after making it reach specified for temperature ranges by heat exchanger to flue gas heating.
Described spray ammonia pipeline is vertical S shape pipeline, and ammonia spray Operation system setting is at vertical duct medium position, and it comprises ammonia water spray barrier, ammoniacal liquor pipeline is connected with ammonia water tank, and ammonia water spray barrier is provided with jet.
Described spray ammonia pipeline turning and out of stock reaction tower air inlet place are provided with the deflector of arc, and denitration reaction tower air inlet place is also provided with soot blower system.
Multilayer is provided with, three-plus-one layer honeycombed catalyst in described denitration reaction tower.
Operation principle of the present invention is: flue gas is after the process of flue-gas temperature treating apparatus, sack cleaner is entered after making flue-gas temperature reach requirement standard, by again carrying out temperature control to flue gas after carrying out dust removal process, enter in denitration reaction tower after making flue-gas temperature be applicable to spray ammonia react and carry out denitration process, then enter chimney by air-introduced machine.
PLC control system monitors the flue-gas temperature before sack cleaner and out of stock reaction tower in real time by temperature sensor, and the flue-gas temperature before sack cleaner is between 180-210 DEG C, and before out of stock reaction tower, flue-gas temperature controls between 180 DEG C ~ 220 DEG C.
Beneficial effect of the present invention is:
1. ensure denitration efficiency >95%, or discharge NOx concentration≤200mg/Nm3.Within the scope of the normal duty of kiln, when flue-gas temperature is between 180 DEG C ~ 230 DEG C, the escaping of ammonia rate of denitrification apparatus is not more than 10ppm.
2. make sack cleaner serviceability temperature greatly reduce, extend its service life, also reduce cost.
3. after process, granular material discharged concentration is 18.6mg/m3, and sulfur dioxide emissioning concentration is 20mg/m3, and discharged nitrous oxides concentration is 75mg/m3.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Here will be described exemplary embodiment in detail, its sample table shows in the accompanying drawings.When description below relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawing represents same or analogous key element.Embodiment described in following exemplary embodiment does not represent all embodiments consistent with the present invention.On the contrary, they only with as in appended claims describe in detail, the example of device that aspects more of the present invention are consistent.
The low-temperature catalyzed denitrification apparatus of a kind of kiln gas waste heat as shown in drawings, it comprises flue collector 1, auxillary flue 2, air compressor machine 3, air accumulator, sack cleaner 4, denitration reaction tower 5, ammonia spray system, air-introduced machine 6, PLC control system, sack cleaner 4, denitration reaction tower 5, ammonia spray system is all arranged on flue collector 1, sack cleaner 4 import is communicated with flue collector 1, before and after sack cleaner 4, flue is provided with flue-gas temperature treating apparatus 7, sack cleaner 4 is communicated with denitration reaction tower 5 by spray ammonia pipeline 8, ammonia spray Operation system setting is in spray ammonia pipeline 8, the gas outlet of denitration reaction tower 5 is connected with air-introduced machine 6, air-introduced machine 6 is connected with chimney 9, chimney 9 place is provided with flue gas inspection device and is connected with PLC control system, flue collector 1 and auxillary flue 2 are provided with control valve be connected with PLC control system, air compressor machine 3 is connected with sack cleaner 4 and out of stock reaction tower 5 by air accumulator, main sack cleaner 4 and the denitration reaction tower 5 given provides source of the gas, temperature processing device 7 is connected with PLC control system.
During normal operation, flue gas is all by flue collector 1, the flue gas in flue gas and nitrogen oxide is dropped to the standard that can discharge.When sack cleaner 4 or denitration reaction tower 5 break down, auxillary flue is opened, and flue collector, by auxillary flue, is closed by flue gas, maintenance sack cleaner or denitration reaction tower.Air compressor machine 3 provides source of the gas mainly to sack cleaner and denitration reaction tower, and air compressor machine 3 is communicated with air accumulator.
Described flue-gas temperature treating apparatus comprises heat exchanger and temperature sensor, is all connected with PLC control system, enters next road program after making it reach specified for temperature ranges by heat exchanger to flue gas heating.
Described spray ammonia pipeline is vertical S shape pipeline, and ammonia spray Operation system setting is at vertical duct 8 medium position, and it comprises ammonia water spray barrier, ammoniacal liquor pipeline is connected with ammonia water tank 11, and ammonia water spray barrier is provided with jet.
Described spray ammonia pipeline 8 turning and out of stock reaction tower air inlet place are provided with the deflector 10 of arc, and denitration reaction tower air inlet place is also provided with soot blower system.
Multilayer is provided with, three-plus-one layer honeycombed catalyst in described denitration reaction tower.
Flue gas is after the process of flue-gas temperature treating apparatus, sack cleaner is entered after making flue-gas temperature reach requirement standard, by again carrying out temperature control to flue gas after carrying out dust removal process, enter in denitration reaction tower after making flue-gas temperature be applicable to spray ammonia react and carry out denitration process, then enter chimney by air-introduced machine.
PLC control system monitors the flue-gas temperature before sack cleaner and out of stock reaction tower in real time by temperature sensor, and the flue-gas temperature before sack cleaner is between 180-210 DEG C, and before out of stock reaction tower, flue-gas temperature controls between 180 DEG C ~ 220 DEG C.
Beneficial effect of the present invention is:
1. ensure denitration efficiency >95%, or discharge NOx concentration≤200mg/Nm3.Within the scope of the normal duty of kiln, when flue-gas temperature is between 180 DEG C ~ 230 DEG C, the escaping of ammonia rate of denitrification apparatus is not more than 10ppm.
2. make sack cleaner serviceability temperature greatly reduce, extend its service life, also reduce cost.
3. after process, granular material discharged concentration is 18.6mg/m3, and sulfur dioxide emissioning concentration is 20mg/m3, and discharged nitrous oxides concentration is 75mg/m3.
Above-described embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the low-temperature catalyzed denitrification apparatus of kiln gas waste heat, it is characterized in that: it comprises flue collector, auxillary flue, air compressor machine, air accumulator, sack cleaner, denitration reaction tower, ammonia spray system, air-introduced machine, PLC control system, sack cleaner, denitration reaction tower, ammonia spray system is all arranged on flue collector, sack cleaner import is communicated with flue collector, flue is provided with flue-gas temperature treating apparatus before and after sack cleaner, sack cleaner is communicated with denitration reaction tower by spray ammonia pipeline, ammonia spray Operation system setting is in spray ammonia pipeline, the gas outlet of denitration reaction tower is connected with air-introduced machine, air-introduced machine is connected with chimney, chimney place is provided with flue gas inspection device and is connected with PLC control system, flue collector and auxillary flue are provided with control valve be connected with PLC control system, air compressor machine is connected with sack cleaner and out of stock reaction tower by air accumulator, main sack cleaner and the denitration reaction tower given provides source of the gas, temperature processing device is connected with PLC control system.
2. the low-temperature catalyzed denitrification apparatus of a kind of kiln gas waste heat according to claim 1, it is characterized in that: described flue-gas temperature treating apparatus comprises heat exchanger and temperature sensor, all be connected with PLC control system, after making it reach specified for temperature ranges by heat exchanger to flue gas heating, enter next road program.
3. the low-temperature catalyzed denitrification apparatus of a kind of kiln gas waste heat according to claim 1, it is characterized in that: described spray ammonia pipeline is vertical S shape pipeline, ammonia spray Operation system setting is at vertical duct medium position, it comprises ammonia water spray barrier, ammoniacal liquor pipeline is connected with ammonia water tank, and ammonia water spray barrier is provided with jet.
4. the low-temperature catalyzed denitrification apparatus of a kind of kiln gas waste heat according to claim 1, is characterized in that: described spray ammonia pipeline turning and out of stock reaction tower air inlet place are provided with the deflector of arc, and denitration reaction tower air inlet place is also provided with soot blower system.
5. the low-temperature catalyzed denitrification apparatus of a kind of kiln gas waste heat according to claim 1, is characterized in that: be provided with multilayer in described denitration reaction tower, three-plus-one layer honeycombed catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510886744.2A CN105396458A (en) | 2015-12-07 | 2015-12-07 | Waste heat low-temperature catalyzing and denitrating device for kiln gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510886744.2A CN105396458A (en) | 2015-12-07 | 2015-12-07 | Waste heat low-temperature catalyzing and denitrating device for kiln gas |
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| Publication Number | Publication Date |
|---|---|
| CN105396458A true CN105396458A (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510886744.2A Pending CN105396458A (en) | 2015-12-07 | 2015-12-07 | Waste heat low-temperature catalyzing and denitrating device for kiln gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107890778A (en) * | 2017-12-19 | 2018-04-10 | 山东联盛环保科技有限公司 | A kind of Mobile low-temperature denitrification apparatus |
| CN109812829A (en) * | 2019-03-21 | 2019-05-28 | 河北视窗玻璃有限公司 | A kind of flue gas processing device and boiler system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06335A (en) * | 1992-06-16 | 1994-01-11 | Mitsubishi Heavy Ind Ltd | Controller for injected quantity of ammonia |
| US6928806B2 (en) * | 2002-11-21 | 2005-08-16 | Ford Global Technologies, Llc | Exhaust gas aftertreatment systems |
| CN101907406A (en) * | 2010-08-17 | 2010-12-08 | 吴江南玻玻璃有限公司 | Flue gas utilization and treatment system for industrial stoves |
| CN205216580U (en) * | 2015-12-07 | 2016-05-11 | 山东盛源环保科技有限公司 | Flue gas of kiln waste heat low temperature catalysis denitrification facility |
-
2015
- 2015-12-07 CN CN201510886744.2A patent/CN105396458A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06335A (en) * | 1992-06-16 | 1994-01-11 | Mitsubishi Heavy Ind Ltd | Controller for injected quantity of ammonia |
| US6928806B2 (en) * | 2002-11-21 | 2005-08-16 | Ford Global Technologies, Llc | Exhaust gas aftertreatment systems |
| CN101907406A (en) * | 2010-08-17 | 2010-12-08 | 吴江南玻玻璃有限公司 | Flue gas utilization and treatment system for industrial stoves |
| CN205216580U (en) * | 2015-12-07 | 2016-05-11 | 山东盛源环保科技有限公司 | Flue gas of kiln waste heat low temperature catalysis denitrification facility |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107890778A (en) * | 2017-12-19 | 2018-04-10 | 山东联盛环保科技有限公司 | A kind of Mobile low-temperature denitrification apparatus |
| CN109812829A (en) * | 2019-03-21 | 2019-05-28 | 河北视窗玻璃有限公司 | A kind of flue gas processing device and boiler system |
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Application publication date: 20160316 |
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