CN-224230016-U - Flue gas circulation and polyoxy incineration system for nitrogen-containing organic waste gas and/or waste liquid

Abstract

The utility model provides a smoke circulating and polyoxin incineration system for nitrogen-containing organic waste gas and/or waste liquid, which comprises an incinerator, wherein a combustion-supporting gas burner, a waste liquid burner and/or a waste gas burner are arranged on the incinerator, the combustion-supporting gas burner is connected with a gas conveying pipe through a pipeline, a waste heat boiler is connected with the incinerator through a pipeline, a smoke conveying pipeline and a low-pressure steam or high-temperature water recycling conveying pipeline are connected to the waste heat boiler, a gas inlet of a smoke drying tower is communicated with the smoke conveying pipeline, a gas outlet of the smoke drying tower is connected with a first output pipe, the first output pipe is connected with a first three-way valve, the first three-way valve is respectively connected with a first conveying pipe and a second conveying pipe, an oxygen supply unit is connected with a mixer through a pipeline, and an outlet of the mixer is respectively connected with the combustion-supporting gas burner, the waste liquid burner and/or the waste gas burner through a pipeline. The utility model improves the heat utilization rate and reduces the flue gas denitration cost.

Inventors

• ZHANG HONGWEI
• WU FEI
• ZHU WEIXIN
• LI YUE
• YANG HAO
• TIAN XINRU
• SONG YANAN
• YANG XIAOKANG
• JIA XINYUE
• CAI JIAXIN
• HU JINTAO

Assignees

• 陕西鼓风机（集团）有限公司

Dates

Publication Date

20260512

Application Date

20250422

Claims (9)

1. 1. The flue gas circulation and polyoxy incineration system for the nitrogen-containing organic waste gas and/or waste liquid comprises an incinerator (12), wherein a combustion-supporting gas burner (10) is arranged on the incinerator (12), and is characterized in that the incinerator (12) is also provided with a waste liquid burner (9) and/or a waste gas burner (11), the combustion-supporting gas burner (10) is connected with a combustion-supporting gas conveying pipe through a pipeline, the waste liquid burner (9) is connected with a nitrogen-containing waste liquid pretreatment unit through a pipeline, and/or the waste gas burner (11) is connected with a nitrogen-containing waste gas conveying unit through a pipeline, and the system further comprises: The waste heat boiler (13) is connected with the incinerator (12) through a pipeline, and the waste heat boiler (13) is connected with a flue gas conveying pipeline and a waste heat recycling conveying pipeline; The gas inlet is communicated with a gas conveying pipeline, a first output pipe is connected to a gas outlet of the gas drying tower (14), the first output pipe is connected with a first three-way valve (17), the first three-way valve (17) is respectively connected with a first conveying pipe and a second conveying pipe, and the second conveying pipe is connected with a gas re-purifying device; The oxygen supply unit (6), the export is connected with blender (8) through the pipeline, the entry and the first conveyer pipe of blender (8) are connected, the export of blender (8) is connected with combustion-supporting gas combustor (10) through the pipeline, and the export of blender (8) still is connected with waste liquid combustor (9) and/or waste gas combustor (11).
2. 2. The flue gas circulating and polyoxin incineration system for nitrogen-containing organic waste gas and/or waste liquid according to claim 1, wherein the flue gas re-purifying device is connected with an induced draft fan (18) through a pipeline, and the induced draft fan (18) is connected with a chimney (19) through a pipeline.
3. 3. The flue gas circulation and polyoxy incineration system for nitrogen-containing organic waste gas and/or waste liquid according to claim 1, further comprising a carbon dioxide separation unit (16), wherein the first output pipe is further connected with a second three-way valve (15), the second three-way valve (15) is connected with a second output pipe and a third output pipe, the second output pipe is connected with the first three-way valve (17), the third output pipe is connected with a gas inlet of the carbon dioxide separation unit (16), and a gas outlet of the carbon dioxide separation unit (16) is connected with the second output pipe through a pipeline.
4. 4. A flue gas recirculation and polyoxy incineration system for nitrogen-containing organic waste gas and/or waste liquid according to claim 3, characterised in that the carbon dioxide separation unit (16) comprises at least two carbon dioxide separation devices arranged in parallel, and the gas inlet of each carbon dioxide separation device is connected to the third output pipe via a pipeline, and the gas outlet of each carbon dioxide separation device is connected to the second output pipe via a pipeline, respectively.
5. 5. The flue gas circulating and polyoxin incineration system for nitrogen-containing organic waste gas and/or waste liquid according to claim 1, characterized in that the inlet of the mixer (8) is provided with an automatic regulating valve (7) on the pipeline connected with the oxygen supply unit (6).
6. 6. A flue gas recirculation and polyoxy incineration system for nitrogen containing organic waste gas and/or liquid according to claim 1 or 5, characterised in that the pipeline to which the outlet of the mixer (8) is connected is also provided with an oxygen content detection sensor.
7. 7. The flue gas circulation and polyoxy incineration system for nitrogen-containing organic waste gas and/or waste liquid according to claim 1, wherein the nitrogen-containing waste gas conveying unit comprises a waste gas buffer storage tank (3) and a waste gas fan (4), the inlet of the waste gas buffer storage tank (3) is connected with a nitrogen-containing waste gas conveying main pipe, the inlet of the waste gas fan (4) is connected with the outlet of the waste gas buffer storage tank (3) through a pipeline, the outlet of the waste gas fan (4) is connected with a pipeline connected with a waste gas burner (11), and flame arresters (5) are arranged on combustion-supporting gas conveying pipes, and the pipeline where the flame arresters (5) connected with the waste gas fan (4) are located is connected with the waste gas burner (11).
8. 8. A flue gas recirculation and polyoxy incineration system for nitrogen containing organic waste gas and/or liquid according to claim 7, characterised in that the pipeline connecting the inlet and outlet of the flame arrester (5) is also provided with a valve.
9. 9. The flue gas circulation and polyoxy incineration system of nitrogen-containing organic waste gas and/or waste liquid according to claim 8, wherein the nitrogen-containing waste liquid conveying unit comprises a waste liquid pump (1) and a filtering pretreatment device (2), an inlet of the waste liquid pump (1) is connected with a nitrogen-containing waste liquid conveying main pipe, a third three-way valve is connected to an outlet of the waste liquid pump (1) and is respectively connected with a first infusion pipe and a second infusion pipe, the first infusion pipe is connected with a waste liquid burner (9), the second infusion pipe is connected with the first infusion pipe through the filtering pretreatment device (2), valves are also arranged on the first infusion pipe and the second infusion pipe, and a waste liquid storage tank is further arranged between the inlet of the waste liquid pump (1) and the nitrogen-containing waste liquid conveying main pipe.

Description

Flue gas circulation and polyoxy incineration system for nitrogen-containing organic waste gas and/or waste liquid Technical Field The utility model relates to the technical field of chemical industry and environmental protection, in particular to a smoke circulating and polyoxin incineration system for nitrogen-containing organic waste gas and/or waste liquid. Background In some chemical and light industrial production, N, N-Dimethylformamide (DMF) is widely applied as a universal solvent, a large amount of waste water containing DMF is generated in the process of production, waste gas and waste liquid are generated in the process of treating and recycling DMF from the waste water containing high concentration of DMF, and the waste gas, the waste liquid and the waste residue contain organic components such as dimethylamine, formic acid, a small amount of DMF and the like, so that the improper treatment and management can cause great influence on the environment. At present, the treatment of waste gas and waste liquid in DMF waste water treatment production of synthetic leather generally adopts an incinerator to burn, but the conventional incinerator is provided with air for supporting combustion, so that the air excess factor is high, the nitrogen oxide content in the burnt flue gas is high, the flue gas flow is high, the waste heat utilization rate is low, the flue gas denitration cost is high, the subsequent further flue gas treatment system is complex, and therefore, the flue gas circulation and multi-oxygen burning system for nitrogen-containing organic waste gas and/or waste liquid with high burning heat utilization rate and low flue gas denitration cost is provided for solving the problems of the conventional incinerator. Disclosure of utility model The utility model aims to overcome the problems in the prior art and provide a flue gas circulation and polyoxy incineration system for nitrogen-containing organic waste gas and/or waste liquid, which can solve the problems, improve the utilization rate of incineration heat and reduce the flue gas denitration cost. The utility model provides a smoke circulating and polyoxin incineration system for nitrogen-containing organic waste gas and/or waste liquid, which comprises an incinerator, wherein the incinerator can be designed into a vertical incinerator and a horizontal incinerator according to the substance form of the nitrogen-containing organic waste gas and/or nitrogen-containing organic liquid and is suitable for incinerating organic solid waste and hazardous waste, the incinerator is of a vertical structure, the incineration temperature in the incinerator can reach 1100-1300 ℃, the combustion temperature in the incinerator can be regulated and controlled according to the characteristics of incineration materials, the high-temperature full incineration of the waste gas or waste liquid in the incinerator is ensured, the oxygen content in the recycled smoke can be automatically regulated by the system, in addition, the controllable and adjustable incineration temperature can be realized by regulating the oxygen content in the recycled smoke, and the low-nitrogen combustion can be realized. The incinerator is also provided with a waste liquid burner and/or an exhaust gas burner, the combustion-supporting gas burner is connected with a combustion-supporting gas conveying pipe through a pipeline, the waste liquid burner is connected with a nitrogen-containing waste liquid pretreatment unit through a pipeline and/or the exhaust gas burner is connected with a nitrogen-containing exhaust gas conveying unit through a pipeline, and the incinerator further comprises: The waste heat boiler is connected with the incinerator through a pipeline, and is connected with a flue gas conveying pipeline and a waste heat recycling conveying pipeline, wherein materials conveyed in the waste heat recycling conveying pipeline are low-pressure steam or high-temperature hot water. The waste heat recovery of the high-temperature flue gas after the incineration of the nitrogen-containing organic waste gas and/or the nitrogen-containing organic waste liquid by the incinerator is carried out by the waste heat boiler, and low-pressure steam or high-temperature hot water is generated and can be used in the main process. In addition, the incinerator and the waste heat boiler can be designed into an integrated structure, so that the system is more compact in arrangement and more convenient and rapid in operation and management The flue gas drying tower comprises a flue gas drying tower body, a flue gas conveying pipeline, a flue gas inlet, a first output pipe, a first three-way valve, a first conveying pipe, a second conveying pipe and a flue gas re-purifying device, wherein the flue gas inlet is communicated with the flue gas conveying pipeline, the gas outlet of the flue gas drying tower body (14) is connected with the first output pipe, the first output pipe is connected with the fi