Energy-saving and environment-friendly direct-type bio-particle fuel flue gas purification device
By using compressed air atomizing reducing agent in the flue gas purification device and reacting with NOX in the flue gas in the high-temperature area, the problem of high cost and low efficiency of flue gas purification in the prior art is solved, and an efficient and economical flue gas denitrification effect is achieved.
Patent Information
- Application Number
- CN202421809032.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-30
AI Technical Summary
In the prior art, purifying flue gas requires expensive catalysts, which are costly and inadequately purified.
An energy-saving and environmentally friendly direct biological particle fuel flue gas purification device is designed to atomize the reducing agent into tiny droplets using compressed air, and a reduction reaction with NOX in the flue gas in the high-temperature area of 800~1200℃.
It has achieved effective denitrification of flue gas, ensured exhaust gas emissions meet standards, reduced engineering renovation costs or investment costs, and achieved good economic and environmental benefits.
Smart Images
Figure CN222816586U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas purification, in particular to an energy-saving and environment-friendly direct biomass particle fuel flue gas purification device. Background Art
[0002] Pollutants discharged into the atmosphere must meet emission standards, and the flue gas from the hot blast furnace must be denitrified and purified to achieve standard emissions. Utility Model Content
[0003] 1. Technical issues to be resolved
[0004] In view of the shortcomings of the existing technology, the utility model provides an energy-saving and environmentally friendly direct biomass particle fuel flue gas purification device, which has the advantages of being able to denitrify the flue gas, ensure that the exhaust gas is discharged in compliance with the standards, and achieve good economic and environmental benefits. It solves the problem that the existing technology requires expensive catalysts for purifying flue gas, which results in high costs and insufficient purification.
[0005] (II) Technical solution
[0006] In order to achieve the above-mentioned good economic and environmental benefits, the utility model provides the following technical solutions: an energy-saving and environmentally friendly direct biomass particle fuel flue gas purification device, comprising a burner, a flue gas channel is arranged on one side of the burner, at least two retaining walls and at least two spray guns are arranged on the inner walls on both sides of the flue gas channel, an atomization port for compressed air is arranged at one end of the spray gun, and a reduction port for adding a reducing agent is arranged next to the atomization port.
[0007] Preferably, the spray gun further comprises a gun rod, and a cooling port for compressed air is arranged on an outer wall at one end of the gun rod.
[0008] Preferably, a nozzle is provided at the other end of the gun rod.
[0009] Preferably, two retaining walls and two spray guns are provided on the inner walls on both sides of the smoke channel, and the retaining walls and the spray guns are spaced apart.
[0010] Preferably, the retaining wall and the spray gun are cross-arranged on both sides of the smoke channel.
[0011] Preferably, an exhaust port is provided on the other side of the smoke passage.
[0012] (III) Beneficial effects
[0013] Compared with the prior art, the utility model provides an energy-saving and environmentally friendly direct biomass particle fuel flue gas purification device, which has the following beneficial effects:
[0014] The flue gas purification device, without affecting the existing hot blast furnace working conditions, denitrates the flue gas by setting up a denitration device, uses compressed air as a power source, and atomizes the reducing agent into tiny droplets at the nozzle. The atomized droplets can fully cover the flue gas channel on the partition wall, so that the droplets can fully contact and react with the flue gas, and the reducing agent is always kept in the temperature range of 800-1200℃ and NO in the flue gas. X A reduction reaction occurs to ensure that exhaust gas meets emission standards, achieve good economic and environmental benefits, and minimize engineering transformation costs or investment costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the structure of the spray gun of the utility model;
[0017] Figure 3 The utility model is a schematic diagram of the smoke flow direction in the smoke channel.
[0018] In the figure: 1. burner; 2. flue gas duct; 3. retaining wall; 4. spray gun; 41. nozzle; 42. gun rod; 43. cooling port; 44. reduction port; 45. atomizing port; 5. exhaust port. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] like Figure 1 and Figure 2As shown, an energy-saving and environmentally friendly direct biomass particle fuel flue gas purification device includes a burner 1, a flue gas channel 2 is arranged on one side of the burner 1, two retaining walls 3 and two spray guns 4 are arranged on the inner walls of both sides of the flue gas channel 2, the retaining wall 3 and the spray gun 4 are arranged at intervals, the retaining wall 3 and the spray gun 4 are arranged crosswise on both sides of the flue gas channel 2, an atomizing port 45 for compressed air is arranged at one end of the spray gun 4, and a reduction port 44 for adding a reducing agent is arranged next to the atomizing port 45; the atomizing port 45 at one end of the spray gun 4 is used to mix and atomize the compressed air with the reducing agent (such as ammonia water or urea solution). This atomization process can form fine atomized particles, usually with a diameter of about tens of microns (such as 60μm or less to 50μm). The fine atomized particles are conducive to the full contact and reaction between the reducing agent and the pollutants (such as NOx) in the flue gas; the atomized reducing agent is sprayed into the flue gas channel 2 through the spray gun 4 to react chemically with the NOx in the flue gas. With the support of SNCR (selective non-catalytic reduction) technology, the reducing agent (such as NH3 or NHx group) reacts with NOx at high temperature to generate harmless nitrogen (N2) and water (H2O). This process effectively reduces the concentration of NOx in the flue gas and achieves the purpose of purifying the flue gas; the design of the spray gun 4 takes into account the penetration and diffusion of the atomized particles. For example, the speed of the water mist can reach 40m / s when it is sprayed from the outlet of the nozzle 41, which ensures that the reducing agent can be fully mixed with the flue gas. At the same time, the setting of the retaining wall 3 may further promote the turbulent mixing of the flue gas and the reducing agent, thereby improving the denitrification efficiency; the spray gun 4 usually has a variety of specifications and flow adjustment capabilities to meet the flue gas purification needs under different working conditions. For example, the flow rate can be adjusted from 15L / h to 300L / h or a wider range (such as 3kg / h to 250kg / h), and the spray shape also has a variety of options such as solid cone and fan. In addition, the flow rate adjustment ratio of a single spray gun 4 can reach 1:5, and the combination of multiple spray guns 4 can meet the needs of any working conditions; the spray gun 4 is equipped with high temperature and corrosion resistant materials such as silicon carbide protective sleeves, and the nozzle 41 is completely placed in the protective sleeve, avoiding the wear of the nozzle 41 by high temperature, high dust and high flow rate flue gas, thereby extending the service life of the spray gun 4; in the flue gas purification device, the spray gun 4 realizes the fine atomization of the reducing agent and efficient denitrification through its unique atomization port 45 and reduction port 44 design. The high penetration, strong mixing effect and ability to adapt to different working conditions of the spray gun 4 enable the device to effectively purify pollutants in the flue gas and meet relevant national emission standards. At the same time, the protection design of the spray gun 4 also ensures its stable operation and long life under harsh working conditions.
[0021] like Figure 2As shown, the spray gun 4 also includes a gun rod 42, and a cooling port 43 for compressed air is arranged on the outer wall of one end of the gun rod 42; the gun rod 42 in the spray gun 4 and the cooling port 43 thereon play an important supporting, guiding and cooling role in the flue gas purification device, which helps to protect the spray gun 4 components, improve the denitrification efficiency and extend the service life of the spray gun 4.
[0022] like Figure 2 As shown, a nozzle 41 is provided at the other end of the gun rod 42; the denitrification spray gun 4 uses compressed air as a power source to atomize the reducing agent into tiny droplets at the nozzle 41. The atomized droplets can fully cover the flue gas channel 2 on the partition wall. These tiny droplets can more fully contact the pollutants (such as NOx) in the flue gas, thereby improving the efficiency and effect of the denitrification reaction. The quality of the atomization effect directly affects the mixing uniformity and reaction rate of the reducing agent and the flue gas.
[0023] like Figure 1 and Figure 2 As shown, an exhaust port 5 is provided on the other side of the flue gas channel 2; the main function of the exhaust port 5 is to discharge the flue gas after purification. After the flue gas passes through the flue gas channel 2 and undergoes denitration and other purification processes by the reducing agent sprayed by the spray gun 4, the purified flue gas is discharged into the atmosphere through the exhaust port 5. This process ensures that the pollutants in the flue gas are effectively removed, reducing pollution to the environment.
[0024] Working principle: Figure 3 As shown, after checking that the device is fault-free, the burner 1 is started, and the flue gas generated by the burner 1 passes through the spray gun 4 along the flue gas channel 2. Under the action of the retaining wall 3, the flue gas can fully contact with the spray gun 4 to carry out a denitration reaction. The atomizing port 45 of the denitration spray gun 4 uses compressed air as a power source to push the reducing agent added at the reduction port 44 through the cooling port 43 on the gun rod 42, and atomize the reducing agent into tiny droplets at the nozzle 41. The atomized droplets can fully cover the flue gas channel 2 on the partition wall, so that the droplets can fully contact and react with the flue gas, and the reducing agent is always kept in the temperature range of 800~1200℃ and NO in the flue gas. X A reduction reaction occurs.
[0025] In summary, the flue gas purification device, without affecting the existing hot blast furnace working conditions, denitrates the flue gas by setting a denitration device, uses compressed air as a power source, and atomizes the reducing agent into tiny droplets at the nozzle 41. The atomized droplets can fully cover the flue gas channel 2 on the partition wall, so that the droplets can fully contact and react with the flue gas, and the reducing agent is always allowed to react with the NOX in the flue gas at a temperature range of 800-1200°C to ensure that the exhaust gas meets the emission standards, achieve good economic and environmental benefits, and minimize the engineering transformation costs or investment costs.
[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An energy-saving and environment-friendly direct biomass pellet fuel flue gas purification device, comprising a burner (1), a flue gas channel (2) being provided on one side of the burner (1), characterized in that: At least two retaining walls (3) and at least two spray guns (4) are provided on the inner walls on both sides of the flue gas channel (2); an atomizing port (45) for compressed air is provided at one end of the spray gun (4); and a reducing port (44) for adding a reducing agent is provided next to the atomizing port (45).
2. The energy-saving and environment-friendly direct biomass particle fuel flue gas purification device according to claim 1 is characterized by: The spray gun (4) further comprises a gun rod (42), and a cooling port (43) for compressed air is provided on an outer wall at one end of the gun rod (42).
3. The energy-saving and environment-friendly direct biomass particle fuel flue gas purification device according to claim 2 is characterized by: The other end of the gun rod (42) is provided with a nozzle (41).
4. The energy-saving and environment-friendly direct biomass particle fuel flue gas purification device according to claim 1 is characterized by: Two retaining walls (3) and two spray guns (4) are arranged on the inner walls on both sides of the smoke channel (2), and the retaining walls (3) and the spray guns (4) are arranged at intervals.
5. The energy-saving and environment-friendly direct biomass particle fuel flue gas purification device according to claim 4 is characterized by: The retaining wall (3) and the spray gun (4) are cross-arranged on both sides of the inner wall of the smoke channel (2).
6. The energy-saving and environment-friendly direct biomass particle fuel flue gas purification device according to claim 1 is characterized by: An exhaust port (5) is provided on the other side of the smoke channel (2).