CN215233310U - Flue gas denitration system after incineration of fluorine-containing waste liquid of fluorine material - Google Patents
Flue gas denitration system after incineration of fluorine-containing waste liquid of fluorine material Download PDFInfo
- Publication number
- CN215233310U CN215233310U CN202120492285.0U CN202120492285U CN215233310U CN 215233310 U CN215233310 U CN 215233310U CN 202120492285 U CN202120492285 U CN 202120492285U CN 215233310 U CN215233310 U CN 215233310U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- fluorine
- heat boiler
- waste heat
- denitration
- Prior art date
- 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.)
- Active
Links
Images
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model belongs to the technical field of energy-conserving production, concretely relates to fluorine material fluorine-containing waste liquid burns back flue gas denitration system. The utility model provides a fluorine material fluorine-containing waste liquid burns back flue gas denitration system, the system includes storage tank, force (forcing) pump, vaporizer, governing valve, burns burning furnace, exhaust-heat boiler, quench cooler, heater, SCR reactor, draught fan to loop through the pipeline intercommunication. In the traditional SNCR denitration technology, a large amount of reducing agents are needed, the waste heat boiler is used for recovering heat and comprehensively utilizing energy sources, a gasifier, a heater and an SCR denitration reactor are used, ammonia escaping from flue gas is fully utilized, the denitration efficiency is improved, and the consumption of auxiliary materials is saved; the waste heat boiler and the quencher are used for reducing the generation of carcinogens such as dioxin in the flue gas.
Description
Technical Field
The utility model belongs to the technical field of energy-conserving production, concretely relates to fluorine material fluorine-containing waste liquid burns back flue gas denitration system.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.
The SCR denitration technology is a selective reduction method, ammonia gas or other suitable reducing agents are added into flue gas on a catalyst, and NOx in the flue gas is converted into nitrogen gas and water by the catalyst. The SNCR denitration technology is a clean denitration technology which does not use a catalyst, sprays reducing agents (such as water, urea solution and the like) containing amino into a furnace at the temperature of 850-1100 ℃, reduces and removes NOx in flue gas and generates nitrogen and water.
The SCR denitration technology and the SNCR denitration technology have the advantages and disadvantages that:
SCR with catalyst and SNCR without catalyst.
The reduction of SNCR in the reaction may be carried out using urea in addition to ammonia. And the SCR flue gas temperature is lower, and urea can be added into the flue gas after being prepared into ammonia.
SNCR has no catalysis, strict requirements on temperature, low temperature and narrow NOx conversion; excessive temperature, NH3Is easily oxidized into NOx to counteract NH3The removal efficiency of (2); on the other hand, the amount and cost of the reducing agent are increased.
SNCR because of the high reaction temperature, the reaction time and the setting and switching of the ammonia injection point are limited by the boiler and/or the heating surface arrangement.
5. In order to meet the requirement of reaction temperature, the requirement of ammonia injection control is high. The ammonia injection control is the key of the SNCR technology, and is the biggest obstacle for limiting the SNCR denitration rate and the operation stability and reliability.
And 6, the SNCR ammonia has large leakage amount and pollutes the atmosphere.
The denitration efficiency of SNCR is generally 30-50% due to the high reaction temperature and the limitation of ammonia leakage, while the denitration efficiency of SCR has almost no upper limit technically, and is only considered from the cost performance.
Because SCR denitration technique and SNCR denitration technique have above-mentioned advantage and shortcoming, how to design a fluorine material fluorine-containing waste liquid and burn back flue gas denitration equipment, reduce energy resource consumption, reduce reductant consumption, improve denitration efficiency again, the problem that technical staff in the field need solve urgently.
SUMMERY OF THE UTILITY MODEL
To the not enough of above-mentioned prior art, the utility model aims to provide a flue gas denitration system after fluoride material fluoride waste liquid burns. The utility model discloses a realize through following technical scheme:
the utility model discloses a first aspect provides a system of fluorine material fluorine-containing waste liquid denitration of flue gas after burning, and the system includes storage tank, force (forcing) pump, governing valve, vaporizer in proper order according to the tube coupling order, burns burning furnace, exhaust-heat boiler, quencher, heater, SCR reactor, draught fan.
The utility model discloses original deNOx systems has been improved. The original system adopts liquid ammonia or ammonia water as the denitration liquid, the utilization rate of the reducing agent is low, and the denitration efficiency is only 20-30%. The urea solution is heated by steam generated by a waste heat boiler at present, and after the urea solution is atomized by a gasifier, steam atomization and a spray gun, fine mist liquid drops (denitrated gas) formed by crushing the urea solution are sprayed into an incinerator, so that the mixing degree of the flue gas and the denitrated gas is effectively improved, the reduction reaction is more sufficient, and the denitration efficiency of the SNCR denitration device reaches 60%. Through the utility model provides a heat transfer mode not only can improve the degree of mixing and improve the denitration rate, can also make full use of waste heat, has practiced thrift electric energy and heat simultaneously, has important meaning to energy-conserving production.
One or more technical schemes that this application provided have following advantage or beneficial effect:
(1) the utility model provides a production system compares that current denitration production system improves the range little, is applied to the production of enterprise and easily realizes.
(2) The energy consumption in the production process is reduced by using the waste heat boiler, and the method has important economic significance. The system improves the denitration efficiency, reduces the generation of dioxin, reduces the escape of ammonia gas and protects the ecological environment while fully utilizing the waste heat.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
FIG. 1 is a schematic view of a flue gas denitration production system in example 1 after incineration of a fluorine-containing waste liquid of a fluorine material;
wherein, 1 is a storage tank, 2 is a pressure pump, 3 is a regulating valve, 4 is a gasifier, 5 is an incinerator, 6 is a waste heat boiler, 7 is a quencher, 8 is a heater, 9 is an SCR reactor, and 10 is an induced draft fan.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Just as the background art introduces, because SNCR denitration, the reductant utilization ratio in the production process is low, and denitration efficiency is poor, in order to solve above technical problem, the utility model provides a flue gas denitration system after fluorine material fluorine-containing waste liquid burns can the supplementary product consumption in the flue gas denitration production process after the effectual fluorine material fluorine-containing waste liquid that reduces burns, improves reductant utilization ratio, increases denitration efficiency.
A system for denitration of flue gas generated after incineration of fluorine-containing waste liquid of fluorine materials sequentially comprises a storage tank, a pressure pump, a regulating valve, a gasifier, an incinerator, a waste heat boiler, a quencher, a heater, an SCR reactor and an induced draft fan according to the sequence of pipeline connection. The urea solution is heated by steam generated by a waste heat boiler, the denitration solution is atomized and sprayed into the incinerator through the spray head, the spray head drives the denitration solution to move by utilizing pressure difference generated by high-speed flow of the steam, and the denitration solution impacts on the impact piece at the front part of the spray head to generate fine and vaporous liquid drops, so that the mixing degree is improved, the reaction is more sufficient, and the denitration efficiency reaches 60%. Through the utility model provides a heat transfer mode not only can improve the degree of mixing and improve the denitration rate, can also make full use of waste heat, has practiced thrift electric energy and heat simultaneously, has important meaning to energy-conserving production.
Furthermore, the side wall of the storage tank is also provided with a return pipeline which is connected with the regulating valve.
Further, the waste heat boiler and the gasifier are connected by a pipeline, and the pipeline is provided with a regulating valve. The waste heat boiler fully utilizes waste heat and provides energy for the gasifier.
Further, the incinerator comprises an air blowing system, a fuel system and a fluoride material fluoride waste liquid incineration system, the incineration system is connected with a waste heat boiler, preferably, the waste heat boiler is connected with a water source, and preferably, the waste heat boiler is supplemented with pure water.
Further, the waste heat boiler is connected with a heater pipeline, preferably, the pipeline is provided with a valve control; preferably, the waste heat boiler further has a pressure relief valve; preferably, the internal pipeline of the waste heat boiler is made of copper, aluminum and iron; preferably, the heater is further provided with a water vapor (the steam of the waste heat boiler is used as supplementary steam, the steam generated by the waste heat boiler is used for heating the flue gas so as to ensure that the flue gas reaches a certain temperature and is subjected to catalytic reduction reaction for denitration) inlet pipeline for supplementary heating of the flue gas, and preferably, the pressure of the water vapor is 0.2-0.5 MPa.
Further, the SCR reactor is connected with a heater through a fan; preferably, the SCR reactor has a catalyst module and a spare catalyst layer.
Further, the waste heat boiler is connected with the quencher through a pipeline to reduce the temperature of the flue gas. Thereby reducing the retention time of the flue gas in a dangerous temperature area and reducing the generation of dioxin. In addition, the waste heat boiler supplies heat to the gasifier and the heater through pipelines, so that the urea in the gasifier is gasified into ammonia gas and supplied to the reducing agent of the system. The steam that utilizes waste heat boiler to produce carries out controllable heating to the flue gas in order to satisfy catalytic reaction temperature demand, can make full use of above-mentioned denitrification facility's escape ammonia simultaneously, makes entire system ammonia escape below 5%.
In order to make the technical solutions of the present disclosure more clearly understood by those skilled in the art, the technical solutions of the present disclosure will be described in detail below with reference to specific examples and comparative examples.
Example 1:
the application provides a system for flue gas denitration after fluoride material fluoride waste liquid burns, as shown in fig. 1, flue gas denitration production system includes, storage tank 1, force (forcing) pump 2, vaporizer 4, governing valve 3, burns burning furnace 5, exhaust-heat boiler 6, quench cooler 7, heater 8, SCR reactor 9, draught fan 10 loop through the pipeline and links to each other.
Wherein, the bottom of the storage tank 1 is provided with a pipeline which is communicated with the pressure pump 2, the urea in the storage tank 1 is conveyed to the gasifier 4 through the pressure pump 2, and the front part of the gasifier 4 is also provided with a regulating valve 3 which is used for controlling the denitration gas flow entering the incinerator 5. The side wall of the storage tank 1 is also provided with a return pipe which is communicated with the gasifier 4 and can flow back to the storage tank 1 when the gasifier is in excessive vaporization.
The waste heat boiler 6 is provided with an outer wall and an inner pipeline structure, a certain gap is formed between the outer wall and the inner pipeline, the inner pipeline is communicated with a pipeline communicated with the waste heat boiler 6 at the top of the incinerator 5, the inner wall of the waste heat boiler 6 is provided with a pipeline connected with the quencher 7, the outer wall is also provided with a pipeline connected with the gasifier 4, the pipeline connected with the waste heat boiler 6 and the gasifier 4 is connected with the heater 8 through a pipeline, the pipeline connected with the gasifier 4 and the waste heat boiler 6 and the pipeline connected with the waste heat boiler 6 and the heater 8 are communicated with the gap in the waste heat boiler 6, and after the fluorine-containing waste liquid is incinerated, smoke does not contact with substances in the outer pipeline.
The heater 8 is provided with an external steam or electric heating measure for supplementary heating.
The SCR reactor 9 is provided with a pipeline communicated with the gasifier 4, and is mixed with the burned flue gas through a gas mixing device to flow into the SCR reactor 9, and the SCR reactor 9 comprises a guide grid, a rectification grid, a catalyst module, a standby catalyst layer and other basic structures.
Example 2:
based on the system of example 1, liquid urea is stored in a storage tank 1 for later use, and the urea is piped to a vaporizer 4, and a regulating valve 3 is used to control the amount of ammonia gas entering an incinerator 5. The waste heat boiler 6 provides steam for the gasifier 4 and provides heat for the heater 8, so that urea in the gasifier 4 is vaporized into denitration steam and is supplied to the incinerator 5 to be used as a reducing agent, the waste heat boiler 6 and the quencher 7 are used as quenching cooling facilities, the temperature range of 300-500 ℃ is avoided as much as possible, carcinogens such as dioxin are prevented from being generated, waste heat is recovered as much as possible, and energy is saved; the heater 8 and the SCR reactor 9 are used for further removing nitrogen oxides in the flue gas, escaping ammonia gas in the flue gas is fully utilized, the denitration efficiency is improved, and auxiliary material consumption is saved; the waste heat boiler and the quencher are used for reducing the generation of carcinogens such as dioxin in the flue gas.
It should be noted that the above examples are only used to illustrate the technical solution of the present invention and not to limit it. Although the present invention has been described in detail with reference to the examples given, those skilled in the art can modify the technical solutions of the present invention or substitute them with equivalents as necessary without departing from the spirit and scope of the technical solutions of the present invention.
Claims (14)
1. A flue gas denitration system after incineration of fluorine-containing waste liquid of fluorine materials is characterized by comprising a storage tank, a pressure pump, a gasifier, a regulating valve, an incinerator, a waste heat boiler, a quencher, a heater, an SCR reactor and an induced draft fan in sequence according to pipeline connection;
wherein the waste heat boiler and the gasifier are connected by a pipeline, and the pipeline is provided with a regulating valve; the waste heat boiler supplies heat to the gasifier and the heater through pipelines, so that urea in the gasifier is vaporized into a reducing agent of the denitration stripping supply system.
2. The flue gas denitration system of claim 1, wherein a return line is further arranged on the side wall of the storage tank and connected with the regulating valve.
3. The system for denitration of flue gas after incineration of fluorine-containing waste liquid of fluorine material of claim 1, wherein the incinerator comprises an air blowing system, a fuel system and an incineration system of fluorine-containing waste liquid of fluorine material, and the incineration system is connected with a waste heat boiler.
4. The flue gas denitration system of claim 3, wherein the waste heat boiler is connected with a water source.
5. The flue gas denitration system of claim 4, wherein the waste heat boiler is provided with pure water supply.
6. The flue gas denitration system after incineration of fluorine-containing waste liquid of fluorine material of claim 1, wherein the waste heat boiler is connected with a heater pipeline.
7. The flue gas denitration system of claim 6, wherein the pipeline is provided with a valve control.
8. The flue gas denitration system of claim 6, wherein the waste heat boiler further comprises a pressure release valve.
9. The flue gas denitration system of claim 6, wherein the waste heat boiler internal pipeline is made of copper, aluminum or iron.
10. The flue gas denitration system of claim 1, wherein the heater is provided with a steam inlet pipeline for supplementing heating flue gas.
11. The flue gas denitration system of claim 10, wherein the steam is from waste heat boiler steam and the pipe network steam is used as supplementary steam.
12. The flue gas denitration system of claim 1, wherein the SCR reactor is connected to the heater through a fan.
13. The system for denitration of flue gas after incineration of fluorine-containing waste liquid of fluorine material of claim 12, wherein the SCR reactor has a catalyst module and a spare catalyst layer.
14. The system for denitration of flue gas after incineration of waste fluorine-containing liquid of fluorine material of claim 1, wherein the waste heat boiler is connected with a quencher through a pipeline and used as a quenching cooling device for reducing the temperature of flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120492285.0U CN215233310U (en) | 2021-03-08 | 2021-03-08 | Flue gas denitration system after incineration of fluorine-containing waste liquid of fluorine material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120492285.0U CN215233310U (en) | 2021-03-08 | 2021-03-08 | Flue gas denitration system after incineration of fluorine-containing waste liquid of fluorine material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215233310U true CN215233310U (en) | 2021-12-21 |
Family
ID=79503245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120492285.0U Active CN215233310U (en) | 2021-03-08 | 2021-03-08 | Flue gas denitration system after incineration of fluorine-containing waste liquid of fluorine material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215233310U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102660652B1 (en) * | 2023-08-30 | 2024-04-26 | 주식회사 성광이엔에프 | Apparatus and method for injecting vaporized urea solution using waste heat of incinerator |
-
2021
- 2021-03-08 CN CN202120492285.0U patent/CN215233310U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102660652B1 (en) * | 2023-08-30 | 2024-04-26 | 주식회사 성광이엔에프 | Apparatus and method for injecting vaporized urea solution using waste heat of incinerator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208546961U (en) | Electricity generation system | |
| CN109458623B (en) | High-salt-content high-chlorine-content organic waste liquid incineration environment-friendly energy-saving discharge system | |
| CN203501199U (en) | NOx-controlled denitrification device of glass kiln | |
| WO2021114084A1 (en) | Energy-saving ultralow flue gas purification system for waste incineration | |
| CN103877856B (en) | A kind of method of coke oven flue waste gas heat utilization and purification | |
| CN109458622A (en) | A kind of acrylonitrile salty organic waste liquid and burned waste gas environmental protection and energy saving exhaust system | |
| CN204073849U (en) | Coke oven flue gas SCR denitration system | |
| CN107261837A (en) | It is a kind of to quote denitrification apparatus and technique that high-temperature flue gas carries out urea pyrolysis ammonia | |
| CN215233310U (en) | Flue gas denitration system after incineration of fluorine-containing waste liquid of fluorine material | |
| CN202527063U (en) | Combined type flue gas denitrification device based on urea solution or ammonia water | |
| CN214319745U (en) | Device for treating CO and nitrogen oxide at tail end of flue gas of sintering machine | |
| KR102178815B1 (en) | Environmental equipment and power generation system including the same | |
| CN104329946A (en) | Waste gas denitration and residual heat recovery integral system for coke oven flue | |
| CN206965521U (en) | A kind of denitrification apparatus quoted high-temperature flue gas and carry out urea pyrolysis ammonia | |
| CN113041837A (en) | Process for denitration of flue gas generated after incineration of fluorine-containing waste liquid of fluorine material | |
| CN112902680A (en) | Sintering flue gas SCR denitration energy-saving emission-reducing method and system | |
| CN208612147U (en) | A kind of cement industry dedusting denitration device | |
| CN215372480U (en) | Submerged combustion type gasification device with ultralow NOx emission | |
| CN215233222U (en) | Removal system for ultralow emission of nitric oxides of household garbage incinerator | |
| CN214114928U (en) | Process unit of gas turbine denitration | |
| CN213032227U (en) | SCR flue gas denitration system for preparing ammonia by urea pyrolysis | |
| CN209415471U (en) | A kind of acrylonitrile salty organic waste liquid and burned waste gas environmental protection and energy saving exhaust system | |
| KR102077738B1 (en) | Power generation system | |
| CN108452677B (en) | SCR flue gas denitration method and device using ammonia water as denitration reducing agent | |
| CN111947167A (en) | Combined treatment system and process method for nitrogen-containing waste gas and waste liquid of ethylene glycol device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |