High-efficiency deacidification system for waste incineration exhaust gas

Abstract

The utility model relates to a kind of garbage incineration waste gas high-efficiency deacidification systems, including base, base is provided with deacidification passage, deacidification passage sequentially includes the air inlet section that is extended back and supplies waste gas input, the falling section that is extended downward, the translation section that is extended back, the lifting section that is extended upward and the air outlet section that is extended back and supplies waste gas output, the rear of air inlet section and falling section junction and the upper of lifting section and air outlet section junction are respectively provided with the powder spray gun that is into lime powder to deacidification passage, so that falling section, translation section and lifting section form lime dispersion area.Using the above scheme, the utility model provides a kind of garbage incineration waste gas high-efficiency deacidification system of reasonable utilization of resources.

Description

Technical Field

[0001] This utility model relates to the field of waste incineration power generation, specifically to a high-efficiency acid removal system for waste incineration exhaust gas. Background Technology

[0002] Waste-to-energy incineration is a process that uses specialized boilers to burn municipal solid waste, converting the resulting heat into electricity. This technology significantly reduces waste volume and eliminates hazardous substances. The heat generated during incineration is used to generate electricity via steam turbines, achieving the resource utilization of waste. However, the process produces large amounts of toxic and harmful gases. Before these gases are released into the atmosphere, it is necessary to remove the toxic and harmful substances they carry, such as acidic gases, incomplete combustion products, persistent organic pollutants, heavy metals, and their compounds.

[0003] When performing acid removal processes on waste gas, the waste gas is often introduced into the acid removal tower from the side. As the waste gas gradually rises, the acid removal liquid sprayed from the top of the acid removal tower reacts with the acidic gas in the waste gas, thereby achieving the acid removal function.

[0004] However, the above-mentioned deacidification process has certain drawbacks, namely, the rising rate of the waste gas fluctuates. In order to ensure that the acidic gas is completely removed, it is often necessary to spray excessive amount of deacidification liquid or to spray multiple times, which leads to the waste of deacidification liquid resources. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a high-efficiency acid removal system for waste incineration exhaust gas that makes reasonable use of resources.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a base, the base being provided with a deacidification channel, the deacidification channel sequentially comprising an air inlet section extending rearward for waste gas input, a downward falling section extending downward, a backward translating section extending backward, an upward lifting section extending upward, and an air outlet section extending rearward for waste gas output. Powder spray guns for injecting lime powder into the deacidification channel are respectively installed behind the connection between the air inlet section and the falling section, and above the connection between the lifting section and the air outlet section, so that the falling section, translating section, and lifting section form a lime dispersion area.

[0007] By adopting the above technical solution, the exhaust gas enters from the inlet section and reaches the connection between the inlet section and the falling section, where it is mixed with lime powder sprayed from the powder spray gun at that point. Then, it undergoes a deacidification reaction as it passes through the falling section, the translation section, and the lifting section. After that, it reaches the connection between the lifting section and the outlet section, where it is mixed with lime powder sprayed from the powder spray gun at that point for the second time. Finally, it flows out of the deacidification channel through the outlet section. The above system has the following advantages: ① It rationally utilizes the powder-carrying function of the waste gas and the automatic settling characteristics of lime powder to form lime dispersion zones in the falling section, the translation section, and the lifting section. After multiple turns and decelerations, the waste gas slowly passes through the lime dispersion zone, allowing the waste gas to fully contact the lime and carry out the deacidification reaction, ensuring the deacidification effect and making full and rational use of lime resources, avoiding resource waste; ② The lime powder injection points are selected at the rear of the connection between the inlet section and the falling section and above the connection between the lifting section and the outlet section. On the one hand, this allows for direct frontal impact on the waste gas, slowing it down; on the other hand, it completely breaks up the bundled lime powder, optimizing the dispersion effect; ③ When the waste gas turns from the falling section to the translation section, it will re-raise the lime powder settled in the translation section, restoring its dispersion state and reusing it for deacidification, further improving the utilization rate of lime resources. In addition, as a modular product, this system can be connected in parallel with multiple modules to increase the waste gas treatment capacity, or connected in series with multiple modules to increase the deacidification capacity.

[0008] The present invention is further configured such that: deceleration baffles are arranged in a front-to-back arrangement on the upper and lower sides of the air intake section, and the deceleration baffles gradually tilt backward as they approach the center of the air intake section, and the deceleration baffles on the upper and lower sides partially overlap in the front-to-back direction.

[0009] By adopting the above technical solution, a deceleration baffle is added to slow down the exhaust gas before it enters the falling section, thereby further extending the deacidification time. At the same time, the deceleration baffles on the upper and lower sides partially overlap in the front-back direction, forming an S-shaped channel to prevent the exhaust gas from passing straight through the center of the intake section, thus ensuring the deceleration effect.

[0010] The present invention is further configured such that the base is provided with a vibrator that generates vibrations in the falling section, the translation section and the lifting section.

[0011] By adopting the above technical solution and adding a vibrator, on the one hand, the channel wall can be vibrated at high frequency to shake off the attached lime and the powder generated by the reaction, thus avoiding blockage. On the other hand, the high-frequency vibration will also be transmitted to the exhaust gas, thereby optimizing the lime dispersion effect in the lime dispersion area.

[0012] The present invention is further configured such that: the translation section extends downward and is provided with a collection section and a transfer section arranged in sequence; the cross-section of the collection section gradually decreases as the height decreases; and the transfer section is provided with a star-shaped discharge valve for sealing and transferring the powder downward.

[0013] By adopting the above technical solution, the lime and the powder generated by the reaction in the lime dispersion area will eventually settle and accumulate in the collection section. When it accumulates to a certain extent, the star-shaped discharge valve will be activated to seal and transfer part of the lime and the powder generated by the reaction to the outside of the base, so as to avoid blockage of the translation section. In addition, the continuous vibration of the vibrator will not only make the powder accumulated in the lime and the powder generated by the reaction flow evenly and prevent blockage, but also form a tight gas barrier, which, together with the star-shaped discharge valve, will prevent the occurrence of waste gas leakage while outputting powder.

[0014] The present invention is further configured such that a bag filter is provided behind the air outlet section.

[0015] By adopting the above technical solution, the bag filter intercepts the lime and the powder generated by the reaction, preventing a small amount of lime and the powder generated by the reaction from flowing out of the deacidification channel with the exhaust gas and causing new problems, thus ensuring the stable operation of the exhaust gas treatment system. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model. Detailed Implementation

[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] like Figure 1As shown, this utility model discloses a high-efficiency desulfurization system for waste incineration exhaust gas. The arrow indicates the flow direction of the exhaust gas. The system includes a base 1, with a desulfurization channel 2. The desulfurization channel 2 sequentially includes an inlet section 21 extending rearward for exhaust gas input, a downward-extending drop section 22, a rearward-extending translation section 23, an upward-extending lifting section 24, and a rearward-extending outlet section 25 for exhaust gas output. An injection point for the desulfurization channel 2 is respectively located behind the connection between the inlet section 21 and the drop section 22, and above the connection between the lifting section 24 and the outlet section 25. The lime powder spray gun 3 forms a lime dispersion zone a through the falling section 22, the translation section 23, and the lifting section 24. The exhaust gas enters from the inlet section 21 and reaches the connection between the inlet section 21 and the falling section 22, where it is mixed with the lime powder sprayed from the powder spray gun 3. Then, it undergoes a deacidification reaction as it passes through the falling section 22, the translation section 23, and the lifting section 24. After that, it reaches the connection between the lifting section 24 and the outlet section 25, where it is mixed with the lime powder sprayed from the powder spray gun 3. Finally, it flows out of the deacidification channel 2 through the outlet section 25. The above system has the following advantages: ① It makes reasonable use of the powder-carrying function of the exhaust gas and the automatic settling characteristics of lime powder to form a lime dispersion zone a in the falling section 22, the translation section 23, and the lifting section 24. After the exhaust gas turns and slows down multiple times, it slowly passes through the lime dispersion zone a, so that the exhaust gas and lime can fully contact each other and carry out the deacidification reaction, ensuring the deacidification effect and making full and reasonable use of lime resources to avoid resource waste; ② The area behind the connection between the air inlet section 21 and the falling section 22 and above the connection between the lifting section 24 and the air outlet section 25 are selected as the lime powder injection points. On the one hand, the exhaust gas can be directly impacted and slowed down. On the other hand, the bundle of injected lime powder is completely broken up, optimizing the dispersion effect; ③ When the exhaust gas turns from the falling section 22 to the translation section 23, it will raise the lime powder that has settled in the translation section 23 again, restore the dispersion state, and reuse it for deacidification, further improving the utilization rate of lime resources.

[0020] The upper and lower sides of the intake section 21 are respectively equipped with deceleration baffles 211 arranged in front and behind. The deceleration baffles 211 gradually tilt backward as they approach the center of the intake section 21. The deceleration baffles 211 on the upper and lower sides partially overlap in the front and back direction. The addition of deceleration baffles 211 decelerates the exhaust gas before it enters the falling section 22, further extending the deacidification time. At the same time, the deceleration baffles 211 on the upper and lower sides partially overlap in the front and back direction, forming an S-shaped channel to prevent the exhaust gas from passing straight through the center of the intake section 21, thereby ensuring the deceleration effect.

[0021] The base 1 is equipped with a vibrator 4 that generates vibrations in the falling section 22, the translation section 23 and the lifting section 24. The addition of the vibrator 4 has two advantages: firstly, it can vibrate the channel wall at high frequency, shaking off the attached lime and the powder generated by the reaction, thus avoiding blockage; secondly, the high-frequency vibration can also be transmitted to the exhaust gas, thereby optimizing the lime dispersion effect in the lime dispersion area a.

[0022] The translation section 23 extends downwards and is provided with a collection section 231 and a transfer section 232 arranged in sequence. The cross-section of the collection section 231 gradually decreases as the height decreases. The transfer section 232 is provided with a star-shaped discharge valve 233 to seal and transfer the powder downwards. The lime and the powder generated by the reaction in the lime dispersion area a will eventually settle and accumulate in the collection section 231. When it accumulates to a certain extent, the star-shaped discharge valve 233 is activated to seal and transfer part of the lime and the powder generated by the reaction to the outside of the base 1, so as to avoid blockage of the translation section 23. In addition, the continuous vibration of the vibrator 4 not only makes the powder accumulated in the lime and the powder generated by the reaction flow evenly and prevents blockage, but also forms a tight gas barrier, which, together with the star-shaped discharge valve 233, outputs powder and prevents the occurrence of waste gas leakage.

[0023] A bag filter 5 is installed after the exhaust section 25. The bag filter 5 intercepts the lime and the powder generated by the reaction, preventing a small amount of lime and the powder generated by the reaction from flowing out of the deacidification channel 2 with the exhaust gas and causing new problems, thus ensuring the stable operation of the exhaust gas treatment system.

Claims

1. A high-efficiency acid removal system for waste incineration exhaust gas, characterized in that: The system includes a base, which is equipped with a deacidification channel. The deacidification channel sequentially includes an air inlet section extending rearward for waste gas input, a downward falling section extending downward, a backward translating section extending backward, an upward lifting section extending upward, and an air outlet section extending rearward for waste gas output. Powder spray guns for spraying lime powder into the deacidification channel are respectively installed behind the connection between the air inlet section and the falling section and above the connection between the lifting section and the air outlet section, so that the falling section, the translating section, and the lifting section form a lime dispersion area.

2. The high-efficiency acid removal system for waste incineration exhaust gas according to claim 1, characterized in that: The upper and lower sides of the air intake section are respectively provided with deceleration baffles arranged in front and behind. The deceleration baffles gradually tilt backward as they approach the center of the air intake section, and the deceleration baffles on the upper and lower sides partially overlap in the front-back direction.

3. The high-efficiency acid removal system for waste incineration exhaust gas according to claim 1, characterized in that: The base is equipped with vibrators that generate vibrations in the falling section, the translation section, and the lifting section.

4. The high-efficiency acid removal system for waste incineration exhaust gas according to claim 3, characterized in that: The translation section extends downward and is provided with a collection section and a transfer section arranged in sequence. The cross-section of the collection section gradually decreases as the height decreases, and the transfer section is provided with a star-shaped discharge valve to seal and transfer the powder downward.

5. The high-efficiency acid removal system for waste incineration exhaust gas according to claim 1, characterized in that: A bag filter is installed after the air outlet section.

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