CN113828117A - Melamine discharging waste gas treatment and recycling system and method - Google Patents
Melamine discharging waste gas treatment and recycling system and method Download PDFInfo
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- CN113828117A CN113828117A CN202111207123.9A CN202111207123A CN113828117A CN 113828117 A CN113828117 A CN 113828117A CN 202111207123 A CN202111207123 A CN 202111207123A CN 113828117 A CN113828117 A CN 113828117A
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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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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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
- B01D53/76—Gas phase processes, e.g. by using aerosols
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
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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
- B01D2257/406—Ammonia
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- 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
Abstract
The invention belongs to the technical field of waste gas treatment, and particularly relates to a melamine discharging waste gas treatment and recycling system and method. The waste gas treatment system comprises a finished product bin, a cyclone separator is arranged in the finished product bin, a waste gas discharge port is arranged at the top of the finished product bin, the waste gas discharge port is connected with a gas inlet of a dust remover at the top of the finished product bin through a pipeline, a gas outlet of the dust remover is connected with a gas inlet of an absorption tower through a pipeline, a gas outlet of the absorption tower is connected with a gas inlet of an induced draft fan through a pipeline, a gas outlet of the induced draft fan is connected with a gas inlet of a molten salt system air blower through a pipeline, and a gas outlet of the molten salt system air blower is connected with a gas inlet in the molten salt furnace. The waste gas treatment method is characterized in that only a first-stage absorption tower is arranged, an induced draft fan is arranged behind an emptying pipe of the absorption tower, gas discharged from the absorption tower is led to an inlet of a blower of a molten salt system, and ammonia-containing gas is introduced into a molten salt furnace through the blower and is reused as ammonia injection denitration.
Description
Technical Field
The invention belongs to the technical field of waste gas treatment, and particularly relates to a melamine discharging waste gas treatment and recycling system and method.
Background
China is the biggest melamine production and export country all over the world at present, the domestic existing melamine production basically adopts the low-pressure gas-phase quenching method melamine production process, and the production process of the prior art is as follows: the molten urea is pumped to a urea feeding port of the reactor by a urine pump, atomized under the action of atomized gas and fed into the reactor, and reacts under the action of a catalyst under certain pressure and temperature conditions to generate melamine. The crystallized and separated melamine enters a finished product cyclone separator along with mixed gas, the melamine is separated and gathered at the bottom of the cyclone, is spirally sent out of the separator by a scraper and pressure, is conveyed and cooled by air flow of a blower, is separated by a dust remover and is packaged to obtain a melamine product. The heat required for the reaction is provided by the molten salt system. The carrier gas of the fluidized bed is the mixed gas of ammonia and carbon dioxide after purification, cooling and pressure boosting preheating.
In this process, the melamine separated from the process gas adsorbs traces of NH3And CO2The melamine is fully mixed with the conveying air in the air flow conveying pipeline by adopting air conveying, the hot powder is cooled by the cold air, and NH adsorbed in the powder3And CO2Is stripped out and diffused into the air. Gas-solid mixture entering a melamine finished product bin is separated by cyclone, and most triamine solid powder is deposited; a small amount of fine melamine powder, ammonia gas and the like are carried in the melamine discharging waste gas discharged from the product bin, and the melamine discharging waste gas is directly discharged to pollute the air and does not meet the requirement of green production.
However, in the prior art, ammonia gas is absorbed by arranging two stages of absorption towers in a melamine system, the principle of the absorption towers is to absorb ammonia gas waste gas in a treatment system by using water, however, the treatment method can generate a large amount of waste water containing ammonia water, and the waste water containing ammonia water is polluting and cannot be directly discharged, so that the problem of the destination of the generated waste water containing ammonia water becomes a big problem.
Therefore, how to economically treat the melamine discharge waste gas has important significance on the production of melamine.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a system and a method for treating and recycling melamine discharged waste gas.
In order to achieve the purpose, the invention adopts the following technical scheme:
one of the purposes of the invention is to disclose a melamine discharging waste gas treatment and recycling system which comprises a finished product bin, wherein a cyclone separator is arranged in the finished product bin, a waste gas discharge port is arranged at the top of the finished product bin, the waste gas discharge port is connected with a gas inlet of a dust remover at the top of the finished product bin through a pipeline, a gas outlet of the dust remover is connected with a gas inlet of an absorption tower through a pipeline, a gas outlet of the absorption tower is connected with a gas inlet of an induced draft fan through a pipeline, a gas outlet of the induced draft fan is connected with a gas inlet of a molten salt system blower through a pipeline, and a gas outlet of the molten salt system blower is connected with a gas inlet in a molten salt furnace.
Preferably, the exhaust port of the dust remover is also connected with the air inlet at the bottom of the reactor through a branch pipeline. The discharged waste gas discharged from the dust remover does not need to be pressurized again, and the heated discharged waste gas enters the reactor through the inlet at the bottom of the reactor through the branch pipeline and directly enters the next production system. The residual pressure of the tail gas is directly used to enter the reactor without being pressurized by a compressor, so that the compression process of the part of gas is omitted, and the power consumption of the part of gas compression is correspondingly saved.
Preferably, a liquid urine washing tower is arranged between the dust remover at the top of the finished product bin and the absorption tower. The gas from the top of the finished product cyclone separator contains a small amount of melamine dust and incompletely reacted urea, and the urea can be washed by the liquid urea washing tower.
Preferably, the air outlet of the liquid-urine washing tower is provided with three branch pipelines: the first pipeline is connected with an air inlet of the absorption tower.
Preferably, the pipeline is communicated with a pneumatic compressor and is connected with an air inlet of a reaction bed gas-carrying system.
Preferably, the third pipeline is connected with a quenching gas inlet at the bottom of the crystallizer.
The invention also discloses a melamine discharging waste gas treatment and recycling method, which utilizes any one of the melamine discharging waste gas treatment and recycling systems, and comprises the following steps:
(1) the melamine gas-solid mixture enters a finished product bin, gas-solid separation is carried out through a cyclone separator, melamine solid powder is deposited at the bottom of the finished product bin, and dust-containing waste gas containing a small amount of melamine solid powder is discharged from a waste gas outlet at the top of the finished product bin;
(2) the discharged dust-containing waste gas enters a dust remover at the top of a finished product bin through a pipeline, gas-solid separation is further carried out under the action of the dust remover, the carried melamine solid powder is deposited at the bottom of the dust remover, and the discharged waste gas is discharged from an exhaust port of the dust remover;
(3) the discharged discharging waste gas enters an absorption tower to absorb and treat ammonia gas and residual melamine solid powder in the discharging waste gas, and the treated ammonia-containing waste gas is discharged from an exhaust port of the absorption tower;
(4) the waste gas containing ammonia discharged from the absorption tower enters the blower of the molten salt system under the action of the draught fan, and the waste gas containing ammonia is introduced into the molten salt furnace through the blower for ammonia spraying and denitration reutilization.
Preferably, the waste gas discharged from the liquid-urine washing tower is divided into three paths: the first path is connected with an air inlet of the absorption tower and enters a tail gas treatment system; the second path is pressurized by a carrier gas compressor and then is recycled as carrier gas of the reaction bed; and the third path returns to the crystallizer to be used as quenching gas for recycling.
Preferably, the discharge waste gas discharged from the dust remover is heated by a branch pipeline and then enters the reactor through the inlet at the bottom of the reactor, and directly enters the next production system.
Advantageous effects
The invention discloses a melamine discharging waste gas treatment and recycling system and method, wherein the waste gas treatment method is only provided with a primary absorption tower, an induced draft fan is arranged behind an emptying pipe of the absorption tower, gas discharged from the absorption tower is led to an inlet of a blower of a molten salt system, and ammonia-containing gas is introduced into a molten salt furnace through the blower and is used for ammonia spraying denitration and recycling. The current exhaust gas amount is about 2330m3Perh (containing 44.35Kg of ammonia gas) and water consumption of about 12m per day3. The waste gas treatment method has the following beneficial effects:
1. the problem of environmental protection caused by discharge waste gas in the production of melamine is solved;
2. the recycling of the ammonia-containing waste gas in the discharge waste gas of the melamine system is realized, the waste of raw materials is avoided, and the production cost is greatly saved;
3. the problem of the direction of ammonia-containing wastewater generated by absorbing and treating ammonia gas in waste gas by water in the existing melamine system is solved;
4. the investment of the supporting facilities of the secondary absorption tower is reduced, and the production cost is greatly saved.
Drawings
FIG. 1: the structural schematic diagram of the melamine discharging waste gas treatment and recycling system in the embodiment 1 of the invention;
FIG. 2: the structural schematic diagram of the melamine discharging waste gas treatment and recycling system in embodiment 3 of the invention;
FIG. 3: the structural schematic diagram of the melamine discharging waste gas treatment and recycling system in embodiment 5 of the invention;
in the figure, 1: a finished product bin; 2: a cyclone separator; 3: an exhaust gas outlet; 4: a dust remover; 5: an absorption tower; 6: an induced draft fan; 7: a molten salt system blower; 8: a molten salt furnace; 9: a reactor; 10: a liquid-urine washing tower; 11: a first pipeline; 12: a second pipeline; 13: a third pipeline; 14: a carrier gas compressor; 15: a reaction bed gas-carrying system; 16: a crystallizer.
Detailed Description
Hereinafter, the present invention will be described in detail. Before the description is made, it should be understood that the terms used in the present specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Accordingly, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the invention, so it should be understood that other equivalents and modifications could be made thereto without departing from the spirit and scope of the invention.
The following examples are given by way of illustration of embodiments of the invention and are not to be construed as limiting the invention, and it will be understood by those skilled in the art that modifications may be made without departing from the spirit and scope of the invention. Unless otherwise specified, reagents and equipment used in the following examples are commercially available products.
Example 1
As shown in fig. 1, a melamine blowing exhaust-gas treatment system of recycling, including finished product feed bin 1, be provided with cyclone 2 in the finished product feed bin, finished product feed bin top is provided with exhaust gas discharge port 3, exhaust gas discharge port passes through the pipeline and is connected with the air inlet of the dust remover 4 at finished product feed bin top, the gas vent of dust remover passes through the pipeline and is connected with the air inlet of absorption tower 5, the gas outlet of absorption tower passes through the pipeline and is connected with the air inlet of draught fan 6, the gas outlet of draught fan passes through the pipeline and is connected with the air inlet of fused salt system air-blower 7, the gas outlet of fused salt system air-blower is connected with the air inlet in the fused salt furnace 8.
Example 2
A method for treating and recycling melamine discharging waste gas, which utilizes the system for treating and recycling melamine discharging waste gas in the embodiment 1, comprises the following steps:
(1) the melamine gas-solid mixture enters a finished product bin 1, gas-solid separation is carried out through a cyclone separator 2, melamine solid powder is deposited at the bottom of the finished product bin, and dust-containing waste gas containing a small amount of melamine solid powder is discharged from a waste gas outlet 3 at the top of the finished product bin;
(2) the discharged dust-containing waste gas enters a dust remover 4 at the top of a finished product bin through a pipeline, gas-solid separation is further carried out under the action of the dust remover 4, the carried melamine solid powder is deposited at the bottom of the dust remover, and the discharged waste gas is discharged from an exhaust port of the dust remover;
(3) the discharged discharging waste gas enters an absorption tower 5, ammonia gas and residual melamine solid powder in the discharging waste gas are absorbed and treated, and the treated ammonia-containing waste gas is discharged from an exhaust port of the absorption tower;
(4) the absorption tower exhaust contains ammonia waste gas and gets into in the molten salt system air-blower 7 under the effect of draught fan 6, lets in the molten salt furnace 8 through the air-blower with containing ammonia waste gas and be used for spouting ammonia denitration reuse.
Example 3
As shown in fig. 2, a melamine blowing exhaust-gas treatment system of recycling, including finished product feed bin 1, be provided with cyclone 2 in the finished product feed bin, finished product feed bin top is provided with exhaust gas discharge port 3, exhaust gas discharge port passes through the pipeline and is connected with the air inlet of the dust remover 4 at finished product feed bin top, the gas vent of dust remover passes through the pipeline and is connected with the air inlet of absorption tower 5, the gas outlet of absorption tower passes through the pipeline and is connected with the air inlet of draught fan 6, the gas outlet of draught fan passes through the pipeline and is connected with the air inlet of fused salt system air-blower 7, the gas outlet of fused salt system air-blower is connected with the air inlet in the fused salt furnace 8.
The exhaust port of the dust remover is also connected with the air inlet at the bottom of the reactor 9 through a branch pipeline. The discharged waste gas discharged from the dust remover does not need to be pressurized again, and the heated discharged waste gas enters the reactor through the inlet at the bottom of the reactor through the branch pipeline and directly enters the next production system. The residual pressure of the tail gas is directly used to enter the reactor without being pressurized by a compressor, so that the compression process of the part of gas is omitted, and the power consumption of the part of gas compression is correspondingly saved.
Example 4
A method for treating and recycling melamine discharging waste gas, which utilizes the system for treating and recycling melamine discharging waste gas in the embodiment 3, comprises the following steps:
(1) the melamine gas-solid mixture enters a finished product bin 1, gas-solid separation is carried out through a cyclone separator 2, melamine solid powder is deposited at the bottom of the finished product bin, and dust-containing waste gas containing a small amount of melamine solid powder is discharged from a waste gas outlet 3 at the top of the finished product bin;
(2) the discharged dust-containing waste gas enters a dust remover 4 at the top of a finished product bin through a pipeline, gas-solid separation is further carried out under the action of the dust remover 4, the carried melamine solid powder is deposited at the bottom of the dust remover, and the discharged waste gas is discharged from an exhaust port of the dust remover;
(3) the discharge waste gas discharged from the dust remover is heated by a branch pipeline, enters the reactor 9 through an inlet at the bottom of the reactor and directly enters the next production system;
(4) feeding waste gas discharged from the dust remover into an absorption tower 5 through another branch pipeline to absorb and treat ammonia gas and residual melamine solid powder in the feeding waste gas, and discharging the treated ammonia-containing waste gas from an exhaust port of the absorption tower;
(5) the absorption tower exhaust contains ammonia waste gas and gets into in the molten salt system air-blower 7 under the effect of draught fan 6, lets in the molten salt furnace 8 through the air-blower with containing ammonia waste gas and be used for spouting ammonia denitration reuse.
Example 5
As shown in fig. 3, a melamine blowing exhaust-gas treatment system of recycling, including finished product feed bin 1, be provided with cyclone 2 in the finished product feed bin, finished product feed bin top is provided with exhaust gas discharge port 3, exhaust gas discharge port passes through the pipeline and is connected with the air inlet of the dust remover 4 at finished product feed bin top, the gas vent of dust remover passes through the pipeline and is connected with the air inlet of absorption tower 5, the gas outlet of absorption tower passes through the pipeline and is connected with the air inlet of draught fan 6, the gas outlet of draught fan passes through the pipeline and is connected with the air inlet of fused salt system air-blower 7, the gas outlet of fused salt system air-blower is connected with the air inlet in the fused salt furnace 8.
The exhaust port of the dust remover is also connected with the air inlet at the bottom of the reactor 9 through a branch pipeline. The discharged waste gas discharged from the dust remover does not need to be pressurized again, and the heated discharged waste gas enters the reactor through the inlet at the bottom of the reactor through the branch pipeline and directly enters the next production system. The residual pressure of the tail gas is directly used to enter the reactor without being pressurized by a compressor, so that the compression process of the part of gas is omitted, and the power consumption of the part of gas compression is correspondingly saved.
And a liquid urine washing tower 10 is arranged between the dust remover at the top of the finished product bin and the absorption tower. The gas from the top of the finished product cyclone separator contains a small amount of melamine dust and incompletely reacted urea, and the urea can be washed by the liquid urea washing tower.
The air outlet of the liquid-urine washing tower 10 is provided with three branch pipelines: the first pipeline 11, the second pipeline 12 and the third pipeline 13, wherein the first pipeline is connected with the air inlet of the absorption tower.
The second pipeline 12 is connected with the gas inlet of a reaction bed carrier gas system 15 through a carrier gas compressor 14.
The third pipeline 13 is connected with a quenching gas inlet at the bottom of the crystallizer 16.
Example 6
A method for treating and recycling melamine discharging waste gas, which utilizes the system for treating and recycling melamine discharging waste gas in the embodiment 5, comprises the following steps:
(1) the melamine gas-solid mixture enters a finished product bin 1, gas-solid separation is carried out through a cyclone separator 2, melamine solid powder is deposited at the bottom of the finished product bin, and dust-containing waste gas containing a small amount of melamine solid powder is discharged from a waste gas outlet 3 at the top of the finished product bin;
(2) the discharged dust-containing waste gas enters a dust remover 4 at the top of a finished product bin through a pipeline, gas-solid separation is further carried out under the action of the dust remover 4, the carried melamine solid powder is deposited at the bottom of the dust remover, and the discharged waste gas is discharged from an exhaust port of the dust remover;
(3) the discharge waste gas discharged from the dust remover is heated by a branch pipeline, enters the reactor 9 through an inlet at the bottom of the reactor and directly enters the next production system;
(4) feeding waste gas discharged from the dust remover into a liquid-urea washing tower through another branch pipeline to wash urea which is not completely reacted in the waste gas;
(5) the waste gas discharged from the gas outlet of the liquid urine washing tower is divided into three paths:
1) the first path enters an absorption tower 5 to absorb and treat ammonia gas and residual melamine solid powder in the discharged waste gas, and the treated ammonia-containing waste gas is discharged from an exhaust port of the absorption tower; the absorption tower exhaust contains ammonia waste gas and gets into in the molten salt system air-blower 7 under the effect of draught fan 6, lets in the molten salt furnace 8 through the air-blower with containing ammonia waste gas and be used for spouting ammonia denitration reuse.
2) The second path is pressurized by a carrier gas compressor 14 and then is recycled as carrier gas of the reaction bed.
3) The third path returns to the crystallizer 16 to be used as quenching gas for recycling.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. The utility model provides a melamine blowing exhaust-gas treatment system of recycling, its characterized in that, includes the finished product feed bin, be provided with cyclone in the finished product feed bin, finished product feed bin top is provided with the exhaust gas discharge mouth, the exhaust gas discharge mouth passes through the pipeline and is connected with the air inlet of the dust remover at finished product feed bin top, the gas vent of dust remover passes through the pipeline and is connected with the air inlet of absorption tower, the gas outlet of absorption tower passes through the pipeline and is connected with the air inlet of draught fan, the gas outlet of draught fan passes through the pipeline and is connected with the air inlet of fused salt system air-blower, the gas outlet of fused salt system air-blower is connected with the air inlet in the fused salt furnace.
2. The melamine discharging waste gas treatment and recycling system according to claim 1, wherein the exhaust port of the dust remover is further connected with the gas inlet at the bottom of the reactor through a branch pipe.
3. The melamine discharging waste gas treatment and recycling system according to claim 1, wherein a liquid-urine washing tower is arranged between the dust remover and the absorption tower at the top of the finished product bin.
4. The system for treating and recycling melamine discharging waste gas according to claim 3, wherein three branch pipelines are arranged at the gas outlet of the liquid-urea washing tower: the first pipeline is connected with an air inlet of the absorption tower.
5. The melamine discharging waste gas treatment and recycling system according to claim 4, wherein the pipeline is connected with the air inlet of the reaction bed gas-carrying system through an air compressor.
6. The melamine discharging waste gas treatment and recycling system according to claim 5, wherein the third pipeline is connected with a quenching gas inlet at the bottom of the crystallizer.
7. A method for treating and recycling melamine discharge waste gas, which is characterized in that the system for treating and recycling melamine discharge waste gas as claimed in any one of claims 1 to 6 is used.
8. The melamine discharge waste gas treatment and recycling method according to claim 7, comprising the steps of:
(1) the melamine gas-solid mixture enters a finished product bin, gas-solid separation is carried out through a cyclone separator, melamine solid powder is deposited at the bottom of the finished product bin, and dust-containing waste gas containing a small amount of melamine solid powder is discharged from a waste gas outlet at the top of the finished product bin;
(2) the discharged dust-containing waste gas enters a dust remover at the top of a finished product bin through a pipeline, gas-solid separation is further carried out under the action of the dust remover, the carried melamine solid powder is deposited at the bottom of the dust remover, and the discharged waste gas is discharged from an exhaust port of the dust remover;
(3) the discharged discharging waste gas enters an absorption tower to absorb and treat ammonia gas and residual melamine solid powder in the discharging waste gas, and the treated ammonia-containing waste gas is discharged from an exhaust port of the absorption tower;
(4) the waste gas containing ammonia discharged from the absorption tower enters the blower of the molten salt system under the action of the draught fan, and the waste gas containing ammonia is introduced into the molten salt furnace through the blower for ammonia spraying and denitration reutilization.
9. The method for treating and recycling melamine discharged waste gas according to claim 8, wherein the waste gas discharged from the liquid-urea washing tower is divided into three paths: the first path is connected with an air inlet of the absorption tower and enters a tail gas treatment system; the second path is pressurized by a carrier gas compressor and then is recycled as carrier gas of the reaction bed; and the third path returns to the crystallizer to be used as quenching gas for recycling.
10. The melamine exhaust gas treatment and recycling method according to claim 8, wherein the exhaust gas discharged from the dust collector is heated by a branch pipe and then enters the reactor through the inlet at the bottom of the reactor, and directly enters the next production system.
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| CN115010674A (en) * | 2022-07-05 | 2022-09-06 | 山东省舜天化工集团有限公司 | Melamine production resource recycling system and recycling method |
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| CN102558079A (en) * | 2011-12-30 | 2012-07-11 | 南通紫鑫实业有限公司 | Process for producing melamine |
| CN103041676A (en) * | 2012-12-30 | 2013-04-17 | 王子国 | Method for providing ammonia used for removing sulfur and nitrate from exhaust gas |
| CN105218470A (en) * | 2015-08-22 | 2016-01-06 | 安徽金禾实业股份有限公司 | Solid and gas tripping device in a kind of Melamine Production |
| CN205076987U (en) * | 2015-08-22 | 2016-03-09 | 安徽金禾实业股份有限公司 | Solid gas separator in melamine production |
| CN210057821U (en) * | 2019-03-15 | 2020-02-14 | 华强化工集团股份有限公司 | Treatment system for melamine packaging tail gas |
| CN213556296U (en) * | 2020-08-07 | 2021-06-29 | 新疆中泰国信节能环保有限公司 | SNCR (selective non-catalytic reduction) denitration system for chain-type molten salt furnace |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115010674A (en) * | 2022-07-05 | 2022-09-06 | 山东省舜天化工集团有限公司 | Melamine production resource recycling system and recycling method |
| CN115010674B (en) * | 2022-07-05 | 2023-11-07 | 山东省舜天化工集团有限公司 | Melamine production resource recycling system and recycling method |
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| CN113828117B (en) | 2022-09-23 |
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Denomination of invention: A system and method for treating and reusing waste gas from melamine discharge Effective date of registration: 20230928 Granted publication date: 20220923 Pledgee: Industrial and Commercial Bank of China Limited Yinan sub branch Pledgor: SHANDONG SHUNTIAN CHEMICAL GROUP Co.,Ltd. Registration number: Y2023980059807 |