Fly ash brick production with steam pressure kettle residual odor treatment structure

Abstract

The utility model provides a kind of residual odor steam treatment structure for fly ash brick production autoclave, it includes: autoclave, the autoclave is equipped with air inlet and exhaust port;Air inlet pipeline is connected with the air inlet of the autoclave;Forced air supply device is connected with the autoclave by the air inlet pipeline, for injecting air into the autoclave;Exhaust pipeline is connected with the exhaust port of the autoclave;Treatment unit is connected with the exhaust pipeline, for treating the steam discharged from the autoclave, the utility model structure is novel, by forced air supply device of magnetic suspension fan, tee, cut-off valve, inject air into the autoclave, push residual odor steam in the kettle to exhaust end, improve odor steam replacement efficiency in the kettle, avoid odor steam leakage when opening kettle.

Description

Technical Field

[0001] This utility model relates to an odor steam treatment structure, specifically an odor steam treatment structure for residual odor in an autoclave used in fly ash brick production. Background Technology

[0002] In existing fly ash brick production processes, after the fly ash bricks in the autoclave have completed the steam curing process, the autoclave must be purged to allow the pressure inside to drop to a safe level before opening the door. However, even after purging, a large amount of odorous steam remains inside the autoclave, and the high-temperature fly ash bricks continue to release odorous steam containing toxic and harmful components such as ammonia and hydrogen sulfide into the autoclave. Currently, the industry generally treats this residual odorous steam by directly venting it into the air, without setting up dedicated collection and treatment facilities.

[0003] The aforementioned direct venting method has significant drawbacks: Firstly, the direct release of toxic and harmful gases such as ammonia and hydrogen sulfide into the atmosphere pollutes the surrounding environment and damages the regional ecosystem. Secondly, workers at the work site are exposed to these odorous gases for extended periods, which can easily cause respiratory discomfort and mucosal irritation, seriously threatening their occupational health and safety. Furthermore, the slow natural cooling rate of the high-temperature products inside the autoclave not only prolongs the time between completion of curing and brick removal but also restricts the autoclave's turnover efficiency, thus affecting the overall capacity of the fly ash brick production line. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a residual odor steam treatment structure for autoclaves used in fly ash brick production, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: This utility model includes:

[0006] An autoclave, wherein the autoclave is provided with an air inlet and an exhaust outlet;

[0007] An air inlet pipe is connected to the air inlet of the autoclave;

[0008] A forced air supply device is connected to the autoclave via the air inlet pipe and is used to inject air into the autoclave.

[0009] An exhaust pipe is connected to the exhaust port of the autoclave;

[0010] A treatment unit, connected to the exhaust pipe, is used to treat the steam discharged from the autoclave. The treatment unit includes at least an alkaline washing device and an adsorption device located downstream of it.

[0011] An exhaust fan, located downstream of the treatment unit, is used to provide negative pressure suction; and an exhaust chimney is used to discharge the treated gas.

[0012] The forced air supply device includes a magnetic levitation fan, which is connected to the air intake pipe via a pipeline, and the pipeline is equipped with a shut-off valve.

[0013] The air intake pipe is equipped with a three-way pipe. The first port of the three-way pipe is connected to the original air intake pipe, the second port is connected to the magnetic levitation fan through the shut-off valve, and the third port is connected to the air inlet of the autoclave.

[0014] The exhaust pipe is equipped with a pneumatic shut-off valve, the exhaust pipe is connected to an exhaust manifold, and the exhaust manifold is connected to the treatment unit.

[0015] The treatment unit also includes a gas-liquid separator disposed between the alkaline washing device and the adsorption device.

[0016] Beneficial effects: 1. By using a forced air supply device consisting of a magnetic levitation fan, a three-way pipe, and a shut-off valve, air is injected into the autoclave, which pushes the residual odor vapor in the autoclave to the exhaust end, improving the efficiency of odor vapor replacement in the autoclave and preventing odor vapor leakage when the autoclave is opened.

[0017] 2. Ambient air is forced into the autoclave by a magnetic levitation fan. The air exchanges heat with the high-temperature finished bricks in the autoclave, quickly removing the heat from the bricks. This effectively shortens the cooling time of the product after constant temperature and pressure, thereby improving the efficiency of exiting the autoclave and speeding up the production pace.

[0018] 3. The treatment unit, consisting of an alkaline washing device (alkaline water washing composite tower), a gas-liquid separator, and an activated carbon adsorption box (adsorption device), sequentially treats the discharged odorous vapors with alkaline detoxification, gas-liquid separation, and activated carbon adsorption to remove toxic and harmful gases such as ammonia and hydrogen sulfide from the vapors, thus preventing nearby workers from inhaling these gases for a long time and affecting their health.

[0019] 4. The collection pipeline, consisting of exhaust pipe, pneumatic shut-off valve and exhaust main pipe, combined with the negative pressure environment created by the exhaust fan, orderly guides the odorous vapor in the autoclave into the treatment unit. After treatment, it is discharged through the chimney, realizing the organized collection, treatment and emission of odorous vapor in compliance with standards, and improving the surrounding environment. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] The following are the labels in the diagram: 1. Autoclave; 2. Inlet pipe; 3. T-junction; 4. Shut-off valve; 5. Exhaust pipe; 6. Pneumatic shut-off valve; 7. Main exhaust pipe; 8. Alkali washing device; 9. Gas-liquid separator; 10. Exhaust fan; 11. Chimney; 12. Magnetic levitation fan; 13. Main air supply pipe. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 The specific embodiments of this utility model will be described in further detail.

[0024] Example 1, by Figure 1 This utility model provides a structure for treating residual odor steam in an autoclave used in fly ash brick production, comprising:

[0025] Autoclave 1, wherein autoclave 1 is provided with an air inlet and an exhaust outlet;

[0026] Air inlet pipe 2 is connected to the air inlet of the autoclave 1;

[0027] The forced air supply device is connected to the autoclave 1 through the air inlet pipe 2 and is used to inject air into the autoclave 1;

[0028] Exhaust pipe 5 is connected to the exhaust port of the autoclave 1;

[0029] The treatment unit is connected to the exhaust pipe 5 and is used to treat the steam discharged from the autoclave 1. The treatment unit includes at least an alkaline washing device 8 and an adsorption device disposed downstream therefrom.

[0030] An exhaust fan 10, located downstream of the treatment unit, is used to provide negative pressure suction; and

[0031] Exhaust chimney 11 is used to discharge treated gas.

[0032] Autoclave 1: As the core equipment for steam curing fly ash bricks, it is equipped with an air inlet and an exhaust outlet, which are used to introduce the medium required for steam curing and to discharge residual odorous steam, respectively.

[0033] Air inlet pipe 2: One end is fixedly connected to the air inlet of autoclave 1, providing a channel for conveying the steam curing medium to autoclave 1, and also serving as the air inlet path for forced air replenishment.

[0034] Forced air supply device: used to inject air into the autoclave 1 to replace odor vapors and rapidly cool down high-temperature products. The device includes a magnetic levitation fan 12 and a main air supply pipe 13. The magnetic levitation fan 12 is connected to the air inlet pipe 2 through the main air supply pipe 13, and a shut-off valve 4 is provided on the main air supply pipe 13. The shut-off valve 4 is used to control the opening and closing of the forced air supply channel, and can be flexibly opened or closed according to the pressure inside the autoclave 1.

[0035] Three-way pipe 3: Installed on the air inlet pipe 2, it has three interfaces. The first interface is connected to the original steam curing medium delivery pipe, the second interface is connected to the air outlet of the magnetic levitation fan 12 through the shut-off valve 4, and the third interface is connected to the air inlet of the autoclave 1. Through the switching function of the three-way pipe 3, the air path can be switched between the steam curing stage and the air replacement stage, ensuring that the steam curing process and the odor treatment process do not interfere with each other.

[0036] Exhaust pipe 5: One end is fixedly connected to the exhaust port of autoclave 1, and the other end is equipped with a pneumatic shut-off valve 6. The pneumatic shut-off valve 6 is used to control the opening and closing of exhaust pipe 5. It can accurately control the exhaust timing according to the residual steam treatment progress in autoclave 1. The end of exhaust pipe 5 away from autoclave 1 is connected to exhaust manifold 7, which collects and transports the odorous steam discharged from each autoclave 1 to the treatment unit.

[0037] Treatment Unit: Connected to the end of the exhaust main 7 furthest from the exhaust pipe 5, this unit is used to purify the residual odor vapor discharged from the autoclave 1 to meet emission standards. The treatment unit includes at least an alkaline scrubbing device 8, a gas-liquid separator 9, and an adsorption device. The alkaline scrubbing device 8 is an alkaline-water scrubbing composite tower, used to achieve preliminary detoxification and odor removal by chemically reacting alkaline solution with acidic harmful gases (such as hydrogen sulfide) in the odor vapor. The gas-liquid separator 9 is located between the alkaline scrubbing device 8 and the adsorption device, used to separate droplets carried in the vapor after alkaline scrubbing, preventing liquid from entering the adsorption device and affecting the adsorption effect. The adsorption device is an activated carbon adsorption box, which uses the porous structure of activated carbon to physically adsorb residual odor molecules in the vapor, further improving the gas purification effect.

[0038] Exhaust fan 10: Located downstream of the treatment unit, its inlet end is connected to the outlet end of the adsorption device, and its outlet end is connected to the chimney 11. When the exhaust fan 10 is working, it can create a negative pressure environment in the entire exhaust and treatment system, providing power for the discharge of residual odor vapor in the autoclave 1, ensuring that the odor vapor can enter the treatment unit in an orderly and efficient manner, and avoiding leakage and diffusion.

[0039] Chimney 11: Fixedly connected to the outlet end of exhaust fan 10, used to discharge the gas purified by the treatment unit to the high altitude, further reducing the impact on the surrounding environment.

[0040] I. Preliminary Preparation Stage: Completion of Steam Curing and Reduction of Pressure to Zero

[0041] After the fly ash bricks complete the steam curing process, the autoclave 1 is first purged according to the original production process. Once the pressure inside the autoclave 1 drops to 0 MPa and it is confirmed that there is no longer a risk of high-pressure steam, the residual odor steam treatment stage begins. At this time, there is still residual steam containing toxic and harmful gases such as ammonia and hydrogen sulfide inside the autoclave 1, and the high-temperature bricks continue to emit odors, preparing for subsequent treatment processes.

[0042] II. Core Stage: Forced Air Replacement and Negative Pressure Collection

[0043] Forced air supply start-up: Activate the newly added magnetic levitation fan 12 on the modified air inlet pipe 2 of autoclave 1, and simultaneously open the shut-off valve 4 between the magnetic levitation fan 12 and the air inlet pipe 2. The magnetic levitation fan 12 continuously injects ambient temperature air into autoclave 1 through the T-connector 3 on the air inlet pipe 2. On the one hand, the air pushes the residual odor vapor in autoclave 1 towards the exhaust port, achieving active replacement of odor vapor; on the other hand, the ambient temperature air exchanges heat with the high-temperature bricks in autoclave 1, quickly removing heat from the bricks and accelerating their cooling, saving time for subsequent unloading operations.

[0044] Negative pressure collection linkage: The pneumatic shut-off valve 6 of the exhaust pipeline 5 is opened simultaneously, connecting the exhaust pipeline 5 of the autoclave 1 to the exhaust manifold 7; at the same time, the rear exhaust fan 10 is started, creating a stable negative pressure environment inside the exhaust manifold 7 and the rear treatment facilities. Under the dual action of negative pressure attraction and forced air supply from the front-end magnetic levitation fan 12, the residual odor vapor displaced in the autoclave 1 flows orderly along the exhaust pipeline 5 and the exhaust manifold 7, preventing odor vapor from leaking into the surrounding environment before the autoclave is opened, and ensuring the sealing and safety of the collection process.

[0045] III. Terminal Stage: Multi-stage purification and emission compliance

[0046] Alkaline washing and detoxification: The odorous steam transported through the exhaust manifold 7 first enters the alkaline washing device 8 in the downstream treatment facility. The alkaline washing device 8 is an alkaline-water washing composite tower. The alkaline solution sprayed inside the tower reacts chemically with the acidic harmful gases (such as hydrogen sulfide) in the steam, converting them into harmless salt substances, thus initially removing the main toxic components and some odors from the steam, completing the first stage of purification.

[0047] Gas-liquid separation and demisting: The steam, after being treated by the alkaline washing device 8, carries a small amount of water mist and then enters the gas-liquid separator 9. The gas-liquid separator 9 completely separates the liquid water mist from the steam through physical separation, preventing the water mist from entering the subsequent adsorption stage and affecting the adsorption effect. At the same time, it reduces the corrosion of downstream equipment by liquid substances, ensures the long-term stable operation of the system, and completes the second stage of purification.

[0048] Activated carbon adsorption for odor removal: After water mist removal, the steam enters the adsorption device, which is an activated carbon adsorption box. The porous structure of activated carbon can efficiently adsorb residual ammonia and other odor molecules in the steam, further purifying the steam odor and ensuring that the treated gas has no obvious odor, thus completing the third stage of purification.

[0049] Emissions meeting standards: The clean gas, after three stages of purification, is discharged into the atmosphere through chimney 11 under the continuous action of exhaust fan 10. The emitted gas meets national air pollutant emission standards, completely completing the treatment process for residual odor vapors and preventing pollution to the surrounding environment.

[0050] IV. Final Stage: Cooling Completed and Preparation for Opening the Kettle

[0051] After the magnetic levitation fan 12 continuously forces air in for a period of time, the residual odorous vapor in the autoclave 1 is continuously replaced, collected, and purified. At the same time, the high-temperature bricks are cooled to a suitable outlet temperature (usually close to room temperature or a temperature that meets the requirements for subsequent handling) through heat exchange with the air. At this point, the magnetic levitation fan 12, shut-off valve 4, pneumatic shut-off valve 6, and exhaust fan 10 are shut off. The odor in the autoclave 1 is basically eliminated, and the brick temperature reaches the standard. The autoclave 1 can then be safely opened for the outlet operation, and the entire treatment system completes one complete operating cycle.

[0052] Specific effects: The forced air supply device, consisting of magnetic levitation fan 12, three-way pipe 3, and shut-off valve 4, injects air into the autoclave 1, pushing the residual odor vapor in the autoclave to the exhaust end, improving the odor vapor replacement efficiency in the autoclave, and preventing odor vapor leakage when the autoclave is opened.

[0053] Ambient air is forcibly injected into the autoclave 1 by a magnetic levitation fan 12. The air exchanges heat with the high-temperature finished bricks in the autoclave, quickly removing the heat from the bricks and effectively shortening the cooling time of the product after constant temperature and pressure, thereby improving the efficiency of exiting the autoclave and speeding up the production pace.

[0054] The treatment unit, consisting of an alkaline washing device 8 (alkaline water washing composite tower), a gas-liquid separator 9, and an activated carbon adsorption box (adsorption device), sequentially treats the discharged odorous vapors with alkaline detoxification, gas-liquid separation, and activated carbon adsorption to remove toxic and harmful gases such as ammonia and hydrogen sulfide from the vapors, thus preventing nearby workers from inhaling these gases for extended periods and affecting their health.

[0055] The collection pipeline, consisting of exhaust pipe 5, pneumatic shut-off valve 6, and exhaust main pipe 7, combined with the negative pressure environment created by exhaust fan 10, orderly guides the odorous vapor in autoclave 1 into the treatment unit. After treatment, it is discharged through chimney 11, realizing the organized collection, treatment, and emission of odorous vapor in compliance with standards, thereby improving the surrounding environment.

[0056] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A residual odor steam treatment structure for an autoclave used in fly ash brick production, comprising an autoclave (1), an inlet pipe (2), a tee pipe (3), a shut-off valve (4), an exhaust pipe (5), a pneumatic shut-off valve (6), an exhaust manifold (7), an alkaline washing device (8), a gas-liquid separator (9), an exhaust fan (10), a chimney (11), a magnetic levitation fan (12), and a make-up air manifold (13), characterized in that: Also includes An autoclave (1) is provided with an air inlet and an exhaust outlet; The air inlet pipe (2) is connected to the air inlet of the autoclave (1); The forced air supply device is connected to the autoclave (1) through the air inlet pipe (2) and is used to inject air into the autoclave (1); The exhaust pipe (5) is connected to the exhaust port of the autoclave (1); The treatment unit is connected to the exhaust pipe (5) and is used to treat the steam discharged from the autoclave (1). The treatment unit includes at least an alkaline washing device (8) and an adsorption device located downstream therefrom. An exhaust fan (10) is located downstream of the treatment unit to provide negative pressure suction. as well as An exhaust chimney (11) is used to discharge treated gas.

2. The residual odor steam treatment structure for an autoclave used in fly ash brick production according to claim 1, characterized in that: The forced air supply device includes a magnetic levitation fan (12), which is connected to the air intake pipe (2) through a pipe, and the pipe is equipped with a shut-off valve (4).

3. The residual odor steam treatment structure for an autoclave used in fly ash brick production according to claim 1, characterized in that: The air intake pipe (2) is provided with a three-way pipe (3). The first interface of the three-way pipe (3) is connected to the original air intake pipe, the second interface is connected to the magnetic levitation fan (12) through the shut-off valve (4), and the third interface is connected to the air inlet of the autoclave (1).

4. The residual odor steam treatment structure for an autoclave used in fly ash brick production according to claim 1, characterized in that: The exhaust pipe (5) is equipped with a pneumatic shut-off valve (6), and the exhaust pipe (5) is connected to an exhaust manifold (7), which is connected to the treatment unit.

5. The residual odor steam treatment structure for an autoclave used in fly ash brick production according to claim 1, characterized in that: The treatment unit also includes a gas-liquid separator (9) disposed between the alkaline washing device (8) and the adsorption device.

6. The residual odor steam treatment structure for an autoclave used in fly ash brick production according to claim 1, characterized in that: The adsorption device is an activated carbon adsorption box, and the alkaline washing device (8) is an alkaline water washing composite tower.

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