Cement kiln co-processing hazardous waste center waste gas treatment system
By employing an alkaline liquid neutralization reaction and bubble sedimentation combined with a sliding dust treatment unit design in a cement kiln co-processing system, the problems of insufficient removal of acidic gases and low dust capture efficiency were solved, achieving efficient treatment and stable emission of waste gas and reducing the risks during the cleaning process.
Patent Information
- Application Number
- CN202610021676.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-08
- Publication Date
- 2026-03-03
AI Technical Summary
In the existing waste gas treatment system of the cement kiln co-processing hazardous waste center, acidic gases are not removed sufficiently, dust capture efficiency is low and collection is uneven, and the cleaning process is cumbersome and prone to waste gas leakage.
The system uses an alkaline liquid inside the chamber to neutralize sulfur dioxide, and uses a jet assembly to generate bubbles to drive dust to settle and be collected. Combined with a single inlet and multiple outlet exhaust gas distribution pipe and a sliding design for the dust treatment unit, it ensures uniform distribution and efficient dust capture, and then performs denitrification treatment through a reactor.
It achieves full neutralization of sulfur dioxide and efficient capture of dust in the exhaust gas, ensuring that the exhaust gas meets emission standards, avoiding exhaust gas leakage during the cleaning process, improving the stability and safety of the system, and reducing environmental compliance risks.
Smart Images
Figure CN121588604A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of waste gas treatment, and in particular to a waste gas treatment system for a cement kiln co-processing hazardous waste center. Background Technology
[0002] With increasingly stringent environmental protection requirements, the co-processing of hazardous waste in cement kilns has become a crucial technological pathway for achieving resource recovery, waste reduction, and harmless disposal. During this process, the combustion of hazardous waste generates exhaust gases containing pollutants such as sulfur dioxide, dust, and nitrogen oxides. Direct emission of these gases would severely harm the atmospheric environment. Currently, the industry commonly employs alkaline solution absorption as a core approach to treat these exhaust gases. This involves introducing the exhaust gas into a treatment device containing an alkaline solution, utilizing acid-base neutralization to remove sulfur dioxide, and leveraging the adsorption of dust by the liquid for preliminary purification. Therefore, developing a highly efficient and stable exhaust gas treatment system for cement kiln co-processing hazardous waste centers has become an essential requirement for the industry.
[0003] Current mainstream hazardous waste gas treatment systems for cement kilns mostly employ a combined process of pretreatment followed by desulfurization and denitrification, and then filtration. Some systems also include activated carbon adsorption devices to remove dioxins. However, these existing systems generally have shortcomings. On the one hand, dust capture and cleaning in some wet desulfurization systems rely on manual periodic slag removal, which is not only cumbersome and labor-intensive but also prone to gas leakage during cleaning. On the other hand, the desulfurization, denitrification, and dust removal modules in some systems are relatively independent, which can easily lead to the discharge of untreated waste gas or secondary pollution of treated areas.
[0004] Regarding the aforementioned technologies, the inventors believe that they suffer from drawbacks such as insufficient removal of acidic gases and low dust capture efficiency with uneven collection. Summary of the Invention
[0005] To address the aforementioned technical issues, this application provides a waste gas treatment system for a cement kiln co-processing hazardous waste center.
[0006] This application provides a waste gas treatment system for a cement kiln co-processing hazardous waste center, which adopts the following technical solution:
[0007] A waste gas treatment system for a cement kiln co-processing hazardous waste center includes a housing. A circulating water outlet is located at the center of the bottom of the housing, and multiple sets of water inlets are located at the top of the housing. A circulating pipeline connects the circulating water outlet and the water inlets, and a submersible pump is installed on the circulating pipeline. A cleaning zone is located inside the housing, and a dust treatment unit is installed within the cleaning zone. The dust treatment unit has the freedom to slide longitudinally within the cleaning zone, and a cleaning opening is located on one side below the cleaning zone. Multiple sets of air inlets are evenly arranged on the side walls of the housing, located below the cleaning zone. Multiple sets of air jets are located at the bottom of the housing, and air jet components are installed on the air jets. An exhaust port is located at the top of the housing.
[0008] By adopting the above technical solution, exhaust gas is discharged into the chamber. The sulfur dioxide in the exhaust gas can fully neutralize with the alkaline liquid inside the chamber, effectively removing acidic gases such as sulfur dioxide and reducing the acidic pollution of the atmosphere. Simultaneously, bubbles generated by the jet assembly push dust upwards, blowing it onto the dust treatment unit. As the dust falls in the solution, it also settles onto the dust treatment unit for collection, efficiently capturing dust from the exhaust gas, improving the dust removal rate, and ensuring that the exhaust gas meets emission standards. A circulating water outlet in the middle of the chamber allows the exhaust gas dust from the inlet to be collected. By evenly distributing water throughout the entire chamber, the dust in the exhaust gas can be more fully collected by the dust treatment unit, improving treatment efficiency and effectiveness, and ensuring the stability of the internal treatment environment. The dust treatment unit has the freedom to slide longitudinally in the cleaning area. When the dust has collected to a certain weight and fallen to a certain position, the cleaning opening can be opened for cleaning, ensuring the continuity and effectiveness of dust collection. Moreover, exhaust gas is stopped from entering when cleaning the dust treatment unit, avoiding exhaust gas leakage and incomplete treatment during the cleaning process, and ensuring the stability and safety of the system operation.
[0009] Preferably, the dust treatment unit includes a support frame and multiple sets of sliding cleaning components, which are evenly arranged on the support frame. Each sliding cleaning component includes an upper sliding rod, a lower sliding rod, and multiple sets of support plates. The upper sliding rod is slidably disposed in the upper part of the support frame, and a stop is provided at the bottom of one end of the lower sliding rod. The two ends of the support plates are rotatably connected to the upper sliding rod and the lower sliding rod, respectively. Multiple sets of levers are provided in the lower part of the support frame near the cleaning opening. The support plates are spoon-shaped, and the two adjacent end faces of the two sets of support plates are vertically aligned.
[0010] By adopting the above technical solution, the lower slide bar and multiple sets of support plates can be pulled out of the box as a whole by pulling the upper slide bar, which is convenient to operate. When the stop of the lower slide bar abuts the lever, the support plate will automatically rotate and flip downward in a spoon shape, which is convenient for cleaning. This allows the dust attached to the support plate to fall off easily. The support plate is spoon-shaped, and the two adjacent end faces of the two sets of support plates are arranged vertically aligned. This design can better collect dust. When the dust is pushed up by the air bubble or falls in the solution, the spoon-shaped support plate can effectively capture the dust, increasing the dust collection area and efficiency. Multiple sets of sliding cleaning components are evenly arranged on the support frame to ensure that the dust can be evenly collected on each support plate inside the box, avoiding the situation where dust accumulates in a certain area, making the entire dust collection process more stable and efficient.
[0011] Preferably, the side wall of the housing at the air inlet is a hollow cavity, and a baffle is provided in the hollow cavity, the baffle having the freedom to slide longitudinally in the hollow cavity.
[0012] By adopting the above technical solution, the baffle slides down to block the air inlet, preventing exhaust gas from leaking directly out of the air inlet when cleaning the dust treatment unit. Stopping the air intake can prevent new dust from entering the housing, preventing the dust treatment unit being cleaned from being contaminated again, thereby improving the cleaning effect, ensuring the safety of the operating environment, and reducing pollution to the surrounding environment.
[0013] Preferably, the bottom of the cleaning area is provided with multiple sets of closing cavities, and a closing assembly is provided in each closing cavity; the closing assembly includes a cylinder, a drive column, and a return spring, the drive column is slidably disposed in the cylinder, one end of the drive column is disposed inside the closing cavity, and the other end of the drive column is disposed in the housing; the return spring is sleeved on the drive column, one end of the return spring is fixedly connected to the drive column, and the other end of the return spring is fixedly connected to the cylinder; the cylinder communicates with the closing cavity, and the closing cavity communicates with the hollow cavity.
[0014] By adopting the above technical solution, the hollow cavity connecting the closed chamber and the air inlet is connected. When the dust treatment unit moves downward, the dust treatment unit will push against the drive column to move, so that the baffle is pushed to slide and close the air inlet through hydraulic changes. After cleaning is completed, the dust treatment unit moves upward under the buoyancy of the liquid, and the reset spring makes the drive column slide upward, and the baffle automatically opens the air inlet.
[0015] Preferably, a reactor is provided on the exhaust port, and multiple sets of reducing agent nozzles are provided on the top of the reactor. The outer end of each reducing agent nozzle is connected to a reducing agent tank, and a filter discharge port is provided on the top of the reactor.
[0016] By adopting the above technical solution, and considering the characteristics of the waste gas from the co-processing of hazardous waste in cement kilns, the reducing agent nozzles in the reactor can precisely spray the reducing agent. The reducing agent can react with the difficult-to-treat components such as nitrogen oxides that may remain in the waste gas, converting them into harmless nitrogen and water. This fills the functional gap that the preceding alkaline liquid can only treat sulfur dioxide and dust. Finally, the gas discharged through the filter outlet has a lower content of harmful substances, making it easier to meet the strict national or local waste gas emission standards and reduce environmental compliance risks.
[0017] Preferably, it also includes an exhaust gas pipeline, which is a distribution pipe with one inlet and multiple outlets. The multi-outlet pipe of the exhaust gas pipeline is installed on multiple sets of the air inlets, and the single-outlet end of the exhaust gas pipeline is installed on the cement kiln. The multi-outlet section of the exhaust gas pipeline passes through the reactor.
[0018] By adopting the above technical solution, the single-inlet, multi-outlet distribution pipe structure can evenly distribute the exhaust gas discharged from the cement kiln to multiple inlets of the housing, allowing the exhaust gas to enter the housing uniformly and fully contact the alkaline liquid, thereby improving the neutralization efficiency of pollutants such as sulfur dioxide in the exhaust gas. It also facilitates the uniform distribution and treatment of dust, enhancing the treatment effect and stability of the entire exhaust gas treatment system. The multi-port section of the exhaust gas pipe runs through the reactor, allowing the heat in the exhaust gas pipe to preheat the reactor, increasing the temperature inside the reactor. This enables the reaction between the reducing agent and the harmful components in the exhaust gas to occur at a more suitable temperature, thereby improving reaction efficiency, enhancing the removal effect of harmful components, and reducing energy consumption.
[0019] Preferably, the cleaning opening is provided with a sealing door, and the outer side of the sealing door is provided with a sliding groove; a drainage funnel is provided at the bottom of the outer side of the cleaning opening; a linear guide rail is provided on the drainage funnel, and a sliding plate is slidably mounted on the linear guide rail; a rotating rod is provided on the sliding plate, one end of the rotating rod is rotatably connected to the sliding plate, and the other end of the rotating rod is rotatably connected to the sealing door; a switch assembly is provided on both sides of the cleaning opening, and the switch assembly is used to push the sealing door to slide along the direction of the cleaning opening.
[0020] By adopting the above technical solution, a sealing door is installed on the cleaning opening, which can effectively seal the cleaning opening when no cleaning operation is being performed, preventing dust, exhaust gas, etc. from leaking out from the cleaning opening, ensuring the internal sealing of the equipment, maintaining the normal working environment of the equipment, and avoiding pollution to the surrounding environment. A linear guide rail is installed on the drainage funnel, and a sliding groove is installed on the outside of the sealing door. With the cooperation of the sliding plate and the rotating rod, the sealing door can smoothly slide open and close along the linear guide rail. The switch components on both sides of the cleaning opening can easily push the sealing door to slide along the direction of the cleaning opening. Only when the sealing door is completely closed by the switch components can the dust treatment unit be completely in place and float upward. This avoids the dust treatment unit from performing cleaning operations when the sealing door is not closed properly, preventing equipment failure or safety accidents caused by the system not being closed, ensuring the safety and stability of equipment operation, and the drainage funnel guides the liquid out.
[0021] Preferably, the switch assembly includes a support rod, a rotating handle, and a slider. One end of the support rod is fixedly connected to the housing, the rotating handle is rotatably connected to the other end of the support rod, the slider is rotatably connected to one end of the rotating handle, and the slider is slidably connected to the slide groove.
[0022] By adopting the above technical solution, the sealing door can be opened or closed by rotating the handle in the rotating switch assembly. The cooperation between the rotating handle, slider, slide groove and linear guide rail can achieve precise control of the movement of the sealing door. By controlling the rotation angle of the rotating handle, the degree of opening of the sealing door can be accurately controlled, ensuring that the sealing door can slide down through the linear guide rail and slide groove to fully open the opening for cleaning, while also ensuring a good sealing effect when closed.
[0023] Preferably, the jet assembly includes an air pump, a delivery pipeline, and multiple sets of aeration discs, with the multiple sets of aeration discs disposed on multiple sets of jet holes, the delivery pipelines being disposed on the multiple sets of jet holes respectively, and the air pump being connected to the delivery pipelines.
[0024] By adopting the above technical solution, the air pump is the power source of the jet assembly. It draws in air from the outside and compresses it to produce gas with a certain pressure and flow rate. The delivery pipeline connects the air pump and the aeration discs, and its function is to safely and stably deliver the compressed gas generated by the air pump to each aeration disc. The delivery pipeline can be reasonably laid out and connected according to actual needs to ensure that the gas can be evenly distributed to each aeration disc, while also reducing pressure loss and leakage during gas transmission. The aeration disc is the key actuator of the jet assembly. It increases the dissolved oxygen concentration in the water by evenly introducing gas into the water in the form of bubbles. The design of the aeration disc usually takes into account factors such as bubble size and distribution uniformity, enabling the bubbles to form a good aeration effect in the water, promoting the activity of microorganisms and the degradation of organic matter, thereby achieving water purification and treatment.
[0025] Preferably, a water replenishment component is provided on the water inlet. The water replenishment component includes a water replenishment pipe, a one-way valve, and a water tank. One end of the water replenishment pipe is set on the water inlet through the one-way valve, and the other end of the water replenishment pipe is set on the water tank.
[0026] By adopting the above technical solution, the water tank, as a container for storing liquid, can provide a continuous liquid source for the system. After cleaning the dust, liquid can be replenished into the system in a timely manner through the water replenishment pipe, ensuring that the system can quickly return to normal operation. The treatment effect on dust will not be affected by the lack of liquid, thus ensuring the continuity and stability of equipment operation. Replenishing the system with new liquid through the water replenishment component can dilute the solution in the system and prevent the solution from reaching saturation due to continuous absorption of impurities in the dust, thereby maintaining the solution's ability to treat dust.
[0027] In summary, this application includes at least one of the following beneficial technical effects:
[0028] 1. By pulling the upper sliding rod, the lower sliding rod and multiple sets of support plates can be pulled out of the housing as a whole, which is convenient to operate. When the stop of the lower sliding rod abuts the lever, the support plate will automatically rotate and flip downward in a spoon shape for easy cleaning, allowing the dust attached to the support plate to fall off easily. The support plate is spoon-shaped, and the two adjacent end faces of the two sets of support plates are arranged vertically aligned. This design can better collect dust. When dust is pushed upward by air bubbles or sinks in the solution, the spoon-shaped support plate can effectively capture the dust, increasing the dust collection area and efficiency. Multiple sets of sliding cleaning components are evenly arranged on the support frame to ensure that the dust inside the housing can be evenly collected on each support plate, avoiding the accumulation of dust in a certain area, making the entire dust collection process more stable and efficient.
[0029] 2. The single-inlet, multi-outlet distribution pipe structure can evenly distribute the exhaust gas from the cement kiln to multiple inlets within the casing, allowing the exhaust gas to enter the casing uniformly and fully contact the alkaline liquid. This improves the neutralization efficiency of pollutants such as sulfur dioxide in the exhaust gas, while also facilitating the uniform distribution and treatment of dust. This enhances the overall treatment effect and stability of the exhaust gas treatment system. The multi-outlet portion of the exhaust gas pipe runs through the reactor, utilizing the heat from the exhaust gas pipe to preheat the reactor, raising the temperature inside the reactor. This allows the reaction between the reducing agent and harmful components in the exhaust gas to occur at a more suitable temperature, thereby improving reaction efficiency, enhancing the removal of harmful components, and reducing energy consumption. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the overall structure in the embodiment.
[0031] Figure 2 This is a diagram of the internal structure of the casing and reactor in the embodiment.
[0032] Figure 3 This is a schematic diagram of the dust treatment unit in the embodiment.
[0033] Figure 4 This is a schematic diagram of the switch assembly in the embodiment.
[0034] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Circulating water outlet; 12. Water inlet; 13. Circulation pipeline; 14. Submersible pump; 15. Air inlet; 16. Jet nozzle; 17. Exhaust port; 18. Linear guide rail; 19. Slide plate; 191. Rotating rod; 2. Cleaning area; 21. Dust handling unit; 211. Support frame; 2111. Lever; 212. Sliding cleaning assembly; 2121. Upper sliding rod; 2122. Lower sliding rod; 2123. Support plate; 2124. Stop; 22. Closing chamber; 23. Closing assembly; 231. 1. Cylinder body; 232. Drive column; 233. Return spring; 24. Cleaning opening; 25. Sealing door; 251. Slide groove; 3. Hollow cavity; 31. Baffle; 4. Reactor; 41. Reducing agent nozzle; 42. Reducing agent tank; 43. Filter outlet; 5. Exhaust gas pipeline; 6. Switch assembly; 61. Support rod; 62. Rotating handle; 63. Slider; 7. Jet assembly; 71. Air pump; 72. Delivery pipeline; 73. Aeration disc; 8. Water supply assembly; 81. Water supply pipe; 82. One-way valve; 83. Water tank; 9. Drainage funnel. Detailed Implementation
[0035] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.
[0036] This application discloses an exhaust gas treatment system for a cement kiln co-processing hazardous waste center. (Refer to...) Figure 1 and Figure 2 The enclosure includes a housing (1), a circulating water outlet (11) at the center of the bottom of the housing (1), multiple sets of water inlets (12) at the top of the housing (1), a circulating pipe (13) connecting the circulating water outlet (11) and the water inlets (12), and a submersible pump (14) on the circulating pipe (13); a cleaning area (2) is provided inside the housing (1), a dust treatment unit (21) is provided inside the cleaning area (2), the dust treatment unit (21) has the freedom to slide longitudinally in the cleaning area (2), and a cleaning opening (24) is provided on one side below the cleaning area (2); multiple sets of air inlets (15) are evenly provided on the side wall of the housing (1), and the multiple sets of air inlets (15) are located below the cleaning area (2); multiple sets of air jet holes (16) are provided on the bottom of the housing (1), and air jet components (7) are provided on the air jet holes (16); and an exhaust system is provided on the top of the housing (1). The inlet (17) is equipped with a water replenishment component (8). The water replenishment component (8) includes a water replenishment pipe (81), a one-way valve (82) and a water tank (83). One end of the water replenishment pipe (81) is set on the water inlet (12) through the one-way valve (82), and the other end of the water replenishment pipe (81) is set on the water tank (83). The alkaline solution is replenished into the tank (1) through the water inlet (12) so that the alkaline solution submerges the cleaning area (2). The exhaust gas generated by combustion in the cement kiln enters the tank (1) through multiple sets of air inlets (15). The sulfur dioxide in the exhaust gas is neutralized with the alkaline solution. The alkaline solution is circulated through the circulating outlet (11), the circulating pipeline (13) and the water inlet (12). The dust in the exhaust gas is spread evenly by the flow of the alkaline solution. The dust is collected on the dust treatment unit (21) by the jet assembly (7).
[0037] Reference Figure 1 and Figure 2 A reactor (4) is installed on the exhaust port (17). A reducing agent nozzle (41) is installed on the top of the reactor (4). The outer end of the reducing agent nozzle (41) is connected to a reducing agent box (42). A filter outlet (43) is installed on the top of the reactor (4). The waste gas after being filtered and neutralized by the alkaline solution reaches the reactor (4). After being denitrified by the reducing agent, harmless gas is discharged. The reactor also includes a waste gas pipe (5). The waste gas pipe (5) is a distribution pipe with one inlet and multiple outlets. The multi-port pipe of the waste gas pipe (5) is installed on multiple sets of air inlets (15). The single-port end of the waste gas pipe (5) is installed on the cement kiln. The multi-port section of the waste gas pipe (5) runs through the reactor (4). The temperature of the waste gas is used to make the reducing agent react with the waste gas at a suitable temperature.
[0038] Reference Figure 2 and Figure 3The dust handling unit (21) includes a support frame (211) and multiple sets of sliding cleaning components (212), which are evenly arranged on the support frame (211). Each sliding cleaning component (212) includes an upper sliding rod (2121), a lower sliding rod (2122), and multiple sets of bearing plates (2123). The upper sliding rod (2121) is slidably arranged in the upper part of the support frame (211), and a stop block (2124) is provided at the bottom of one end of the lower sliding rod (2122). The two ends of the bearing plate (2123) are rotatably connected to the upper sliding rod (2121) and the lower sliding rod (2122), respectively. Multiple sets of levers (2111) are provided in the lower part of the support frame (211) near the cleaning opening (24). The bearing plate (2123) is spoon-shaped, and the two adjacent end faces of the two sets of bearing plates (2123) are vertically aligned. The jet assembly (7) includes an air pump (71), a conveying pipeline (72), and multiple sets of aeration discs (73). The multiple sets of aeration discs (73) are set on multiple sets of jet holes (16), and the conveying pipelines (72) are respectively set on multiple sets of jet holes (16). The air pump (71) is connected to the conveying pipelines (72). The exhaust gas enters the housing (1). The air pump (71) and the conveying pipelines (72) deliver gas through the aeration discs (73) to generate dense bubbles that blow upwards first, so that the dust is carried by the bubbles to the upper layer of the alkaline solution. The dust falls to the support plate (2123) for dust removal and collection. When cleaning the dust treatment unit (21), the upper sliding rod (2121) is pulled out. When the lever (2111) touches the stop block (2124), the upper sliding rod (2121) slides down the lower sliding rod (2122) to stop, so that the support plate (2123) flips over. At this time, the dust is easy to fall off and clean.
[0039] Reference Figure 2The side wall of the housing (1) at the air inlet (15) is a hollow cavity (3). A baffle (31) is provided in the hollow cavity (3). The baffle (31) has the freedom to slide longitudinally in the hollow cavity (3). Multiple sets of closing cavities (22) are provided at the bottom of the cleaning area (2). A closing assembly (23) is provided in the closing cavity (22). The closing assembly (23) includes a cylinder (231), a drive column (232), and a return spring (233). The drive column (232) is slidably disposed in the cylinder (231). One end of the drive column (232) is disposed inside the closing cavity (22), and the other end of the drive column (232) is disposed inside the housing (1). The return spring (233) is sleeved on the drive column (232). One end of the spring (23) is fixedly connected to the drive column (232), and the other end of the return spring (233) is fixedly connected to the cylinder (231). The cylinder (231) is connected to the closing chamber (22), and the closing chamber (22) is connected to the hollow chamber (3). When the dust collected by the dust treatment unit (21) reaches a certain weight, the dust treatment unit (21) slides down along the cleaning area (2). The dust treatment unit (21) abuts against the drive column (232), causing the drive column (232) to slide down in the cylinder (231) and the closing chamber (22). The oil in the closing chamber (22) drives the baffle (31) of the hollow chamber (3) to slide down. The baffle (31) blocks the air inlet (15) so that the exhaust gas temporarily stops entering the box (1).
[0040] Reference Figure 3 and Figure 4A sealing door (25) is provided on the cleaning opening (24), and a sliding groove (251) is provided on the outer side of the sealing door (25); a drainage funnel (9) is provided at the bottom of the outer side of the cleaning opening (24); a linear guide rail (18) is provided on the drainage funnel (9), and a sliding plate (19) is slidably provided on the linear guide rail (18). A rotating rod (191) is provided on the sliding plate (19), and one end of the rotating rod (191) is rotatably connected to the sliding plate (19). The other end of the door is rotatably connected to the sealing door (25); a switch assembly (6) is provided on both sides of the cleaning opening (24). The switch assembly (6) is used to push the sealing door (25) to slide along the direction of the cleaning opening (24). The switch assembly (6) includes a support rod (61), a rotating handle (62) and a slider (63). One end of the support rod (61) is fixedly connected to the housing (1), and the rotating handle (62) is rotatably connected to the other end of the support rod (61). Block (63) is rotatably connected to one end of the rotating handle (62), and slider (63) is slidably connected to the slide groove (251). When the sealing door (25) is opened, the solution in the box (1) is discharged through the drain funnel (9). The dust treatment unit (21) is taken out for cleaning. By rotating the rotating handle (62) in the rotating switch assembly (6), the sealing door (25) is opened or closed in the direction of the original cleaning opening (24). When the sealing door (25) is closed, the dust treatment unit (21) is pushed to the preset position after the sealing door (25) is installed in place. Only then can the dust treatment unit (21) slide up and down in the cleaning area (2). When the sealing door (25) is opened, the slider (63) reaches the position laterally along the slide groove (251). Only then can the slider (63) slide longitudinally along the slide groove (251). At this time, the linear guide rail (18), the slide plate (19) and the rotating rod (191) work together to make the sealing door (25) slide down to completely open the cleaning opening (24).
[0041] The working principle of the waste gas treatment system for a cement kiln co-processing hazardous waste center in this application is as follows: the waste gas generated by the cement kiln first enters the waste gas pipeline (5), which is a distribution pipe with one inlet and multiple outlets, which can evenly distribute the waste gas to multiple sets of air inlets (15) of the box (1). The multiple outlets of the waste gas pipeline (5) pass through the reactor (4), and the temperature of the waste gas itself can be used to preheat the subsequent denitrification reaction, ensuring that the reducing agent reacts with the waste gas at a suitable temperature. The box (1) stores an alkaline solution, which is continuously replenished by the water replenishment component (8). After the waste gas enters the box (1) from the air inlet (15), it comes into contact with the alkaline solution, and the sulfur dioxide in the waste gas is neutralized and removed. The air pump (71) delivers the gas to the aeration plate of the jet nozzle (16) at the bottom of the box through the conveying pipeline (72). 73) Gas supply generates dense upward bubbles. The submersible pump (14) pumps the alkaline solution from the bottom circulation outlet (11) to the top inlet (12) through the circulation pipeline (13) to form a solution circulation. The circulating solution can improve the desulfurization efficiency and help the dust in the exhaust gas to spread evenly and float to the upper layer of the solution with the bubbles, and finally fall onto the support plate (2123) of the dust treatment unit (21). The support plate (2123) of the dust treatment unit (21) is spoon-shaped and the adjacent support plates (2123) are vertically aligned, which can efficiently receive the floating dust. When the dust on the support plate (2123) reaches a certain weight, the dust treatment unit (21) slides down along the cleaning area (2) and abuts against the drive column (232) of the closing component (23). The drive column (232) is pressed down, causing the oil in the closed cavity (22) to push the baffle (31) of the hollow cavity (3) down, finally blocking the air inlet (15) and temporarily stopping the exhaust gas from entering to prevent exhaust gas leakage. The exhaust gas after desulfurization and dust removal enters the reactor (4) from the exhaust port (17) at the top of the box (1). The reducing agent nozzle (41) at the top of the reactor (4) sprays the reducing agent into the exhaust gas to denitrify it. The harmless gas after denitrification is finally discharged through the filter outlet (43) at the top of the reactor (4). Turn the rotating handle (62) of the switch assembly (6) so that the slider (63) first slides laterally along the slide groove (251) of the sealing door (25). While moving, the sealing door (25) moves along the cleaning opening (24). The sliding door (25) opens in the direction of the slide. The slider (63) reaches the designated position and then slides longitudinally. In conjunction with the linear guide rail (18), the slide plate (19), and the rotating rod (191), the sealing door (25) slides downward, completely opening the cleaning opening (24). At the same time, the solution in the box (1) is discharged through the bottom drain funnel (9). The upper sliding rod (2121) of the dust treatment unit (21) is pulled out. When the lever (2111) abuts against the stop (2124) of the lower sliding rod (2122), the upper sliding rod (2121) continues to slide while the lower sliding rod (2122) stops, causing the bearing plate (2123) to flip and dump the collected dust for cleaning. After cleaning, the handle (62) is turned in the opposite direction to close the sealing door (25). Only when the sealing door (25) is installed in place...Only after the dust treatment unit (21) is pushed to the preset position can it resume its up-and-down sliding function in the cleaning area (2). Then, the baffle (31) moves upward to open the air inlet (15), and the equipment restarts the exhaust gas treatment.
[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A waste gas treatment system for a cement kiln co-processing hazardous waste center, characterized in that: The enclosure includes a housing (1), with a circulating water outlet (11) at the center of the bottom of the housing (1) and multiple sets of water inlets (12) at the top of the housing (1). A circulating pipe (13) is connected to the circulating water outlet (11) and the water inlets (12), and a submersible pump (14) is installed on the circulating pipe (13). A cleaning area (2) is provided inside the housing (1), and a dust treatment unit (21) is provided inside the cleaning area (2). 1) It has the freedom to slide longitudinally in the cleaning area (2), and a cleaning opening (24) is provided on one side below the cleaning area (2); multiple sets of air inlets (15) are evenly provided on the side wall of the box (1), and the multiple sets of air inlets (15) are located below the cleaning area (2); multiple sets of jet holes (16) are provided on the bottom of the box (1), and jet components (7) are provided on the jet holes (16); an exhaust port (17) is provided on the top of the box (1).
2. The waste gas treatment system for a cement kiln co-processing hazardous waste center according to claim 1, characterized in that: The dust treatment unit (21) includes a support frame (211) and multiple sets of sliding cleaning components (212), which are evenly arranged on the support frame (211). Each sliding cleaning component (212) includes an upper sliding rod (2121), a lower sliding rod (2122), and multiple sets of bearing plates (2123). The upper sliding rod (2121) is slidably arranged in the upper part of the support frame (211), and a stop block (2124) is provided at the bottom of one end of the lower sliding rod (2122). The two ends of the bearing plate (2123) are rotatably connected to the upper sliding rod (2121) and the lower sliding rod (2122), respectively. Multiple sets of levers (2111) are provided in the lower part of the support frame (211) near the cleaning opening (24). The bearing plate (2123) is spoon-shaped, and the two adjacent end faces of the two sets of bearing plates (2123) are vertically aligned.
3. The waste gas treatment system for a cement kiln co-processing hazardous waste center according to claim 1, characterized in that: The side wall of the housing (1) at the air inlet (15) is a hollow cavity (3), and a baffle (31) is provided in the hollow cavity (3). The baffle (31) has the freedom to slide longitudinally in the hollow cavity (3).
4. The waste gas treatment system for a cement kiln co-processing hazardous waste center according to claim 3, characterized in that: The bottom of the cleaning area (2) is provided with multiple sets of closing cavities (22), and a closing component (23) is provided in the closing cavity (22). The closing component (23) includes a cylinder (231), a drive column (232) and a return spring (233). The drive column (232) is slidably disposed in the cylinder (231). One end of the drive column (232) is disposed inside the closing cavity (22), and the other end of the drive column (232) is disposed inside the housing (1). The return spring (233) is sleeved on the drive column (232). One end of the return spring (233) is fixedly connected to the drive column (232), and the other end of the return spring (233) is fixedly connected to the cylinder (231). The cylinder (231) is connected to the closing cavity (22), and the closing cavity (22) is connected to the hollow cavity (3).
5. The waste gas treatment system for a cement kiln co-processing hazardous waste center according to claim 1, characterized in that: A reactor (4) is provided on the exhaust port (17). Multiple sets of reducing agent nozzles (41) are provided on the top of the reactor (4). The outer end of the reducing agent nozzle (41) is connected to a reducing agent tank (42). A filter discharge port (43) is provided on the top of the reactor (4).
6. The waste gas treatment system for a cement kiln co-processing hazardous waste center according to claim 5, characterized in that: It also includes an exhaust gas pipe (5), which is a distribution pipe with one inlet and multiple outlets. The multi-port pipe of the exhaust gas pipe (5) is set on multiple sets of the air inlets (15). The single-port end of the exhaust gas pipe (5) is set on the cement kiln. The multi-port part of the exhaust gas pipe (5) passes through the reactor (4).
7. The waste gas treatment system for a cement kiln co-processing hazardous waste center according to claim 1, characterized in that: A sealing door (25) is provided on the cleaning opening (24), and a sliding groove (251) is provided on the outer side of the sealing door (25); a drainage funnel (9) is provided at the bottom of the outer side of the cleaning opening (24); a linear guide rail (18) is provided on the drainage funnel (9), and a sliding plate (19) is slidably provided on the linear guide rail (18). A rotating rod (191) is provided on the sliding plate (19), one end of the rotating rod (191) is rotatably connected to the sliding plate (19), and the other end of the rotating rod (191) is rotatably connected to the sealing door (25); a switch assembly (6) is provided on both sides of the cleaning opening (24), and the switch assembly (6) is used to push the sealing door (25) to slide along the direction of the cleaning opening (24).
8. The waste gas treatment system for a cement kiln co-processing hazardous waste center according to claim 7, characterized in that: The switch assembly (6) includes a support rod (61), a rotating handle (62), and a slider (63). One end of the support rod (61) is fixedly connected to the housing (1), the rotating handle (62) is rotatably connected to the other end of the support rod (61), the slider (63) is rotatably connected to one end of the rotating handle (62), and the slider (63) is slidably connected to the slide groove (251).
9. The waste gas treatment system for a cement kiln co-processing hazardous waste center according to claim 1, characterized in that: The jet assembly (7) includes an air pump (71), a delivery pipeline (72), and multiple sets of aeration discs (73). The multiple sets of aeration discs (73) are arranged on multiple sets of jet holes (16), and the delivery pipelines (72) are respectively arranged on multiple sets of jet holes (16). The air pump (71) is connected to the delivery pipelines (72).
10. The waste gas treatment system for a cement kiln co-processing hazardous waste center according to claim 1, characterized in that: A water replenishment component (8) is provided on the water inlet (12). The water replenishment component (8) includes a water replenishment pipe (81), a one-way valve (82), and a water tank (83). One end of the water replenishment pipe (81) is set on the water inlet (12) through the one-way valve (82), and the other end of the water replenishment pipe (81) is set on the water tank (83).