Caustic soda usage optimization device for wet scrubbers used in waste incineration flue gas treatment

Abstract

The present invention provides a caustic soda utilization optimization device for a wet scrubber used for treating waste incineration flue gas, comprising: a wet scrubber for scrubbing incoming incineration flue gas; a caustic soda storage tank for storing a caustic soda solution used to remove acidic substances from the incineration flue gas; a caustic soda delivery mechanism electrically connected to the caustic soda storage tank and the wet scrubber, respectively, for delivering the caustic soda solution from the caustic soda storage tank to the wet scrubber; a cooling mechanism mounted externally to the caustic soda delivery mechanism for cooling the caustic soda solution delivered by the caustic soda delivery mechanism; and a cleaning mechanism electrically connected to the caustic soda delivery mechanism for cleaning the pipeline after the caustic soda delivery mechanism is shut down. The present invention can improve the utilization efficiency of caustic soda in the wet scrubber, reduce pipeline blockage and crystallization, and selectively adjust the cooling efficiency based on the temperature of the acidic gas and the dehumidifying liquid, thereby meeting different requirements and improving flue gas treatment efficiency.

Description

Technical Field

[0001] The invention belongs to the field of garbage waste gas treatment, and in particular relates to a caustic soda usage optimization device for a wet scrubber used for garbage incineration flue gas treatment. Background Art

[0002] Waste incineration is the process of reducing the volume of waste through oxidation at high temperatures through appropriate thermal decomposition, combustion, melting and other reactions, turning it into residue or molten solid matter. Waste incineration facilities must be equipped with flue gas treatment facilities to prevent heavy metals, organic pollutants and the like from being discharged back into the environmental medium. Recycling the heat generated by waste incineration can achieve the goal of waste resource utilization. Waste incineration is an older traditional method of waste disposal. Since incineration can significantly reduce the volume of waste, save land, eliminate various pathogens, and convert toxic and harmful substances into harmless substances, it has become one of the main methods of urban waste disposal. Modern waste incinerators are equipped with advanced smoke purification devices to reduce air pollution.

[0003] Currently, after waste incineration, some flue gas contains acidic gases, which need to be removed before discharge. Currently, a wet scrubber is typically used to cool and scrub the flue gas, remove the acidic gases, and cool it before discharge. However, when using caustic soda in current scrubbers, the caustic soda control system in the wet scrubber has drawbacks. Normally, a high pH in the wet tower cooling section reduces caustic soda usage, while a low pH increases caustic soda usage. Even if the pH in the wet tower cooling section remains above the set value for an extended period, the caustic soda injection valve remains open to prevent crystallization in the pipes, resulting in waste. Furthermore, the inability to properly cool the flue gas according to actual cooling requirements also impacts the flue gas treatment process. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a caustic soda usage optimization device for a wet scrubber for waste incineration flue gas treatment, so as to solve the problem of low caustic soda usage efficiency in the wet scrubber in the prior art.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a caustic soda usage optimization device for a wet scrubber used for treating waste incineration flue gas, comprising:

[0006] Wet scrubber, used to scrub the incoming incineration flue gas;

[0007] a caustic soda storage tank, used to store caustic soda solution, wherein the caustic soda solution is used to remove acidic substances in the incineration flue gas;

[0008] a caustic soda conveying mechanism, respectively connected to the caustic soda storage tank and the wet scrubber, for conveying the caustic soda solution in the caustic soda storage tank to the wet scrubber;

[0009] a cooling mechanism, installed outside the caustic soda conveying mechanism, for cooling the caustic soda solution conveyed by the caustic soda conveying mechanism;

[0010] a cleaning mechanism, electrically connected to the caustic soda conveying mechanism, for cleaning the pipeline after the caustic soda conveying mechanism is shut down;

[0011] The output end of the caustic soda conveying mechanism is conductively connected to a dehumidification mechanism, and the dehumidification mechanism is conductively connected to the wet scrubber and the caustic soda conveying mechanism to perform dehumidification treatment on the inside of the wet scrubber.

[0012] In one embodiment of the present invention, the caustic soda conveying mechanism includes a rotating drum installed outside the caustic soda storage tank, the rotating drum is conductively connected to the caustic soda storage tank through a connecting pipe, and the other side of the rotating drum is conductively connected to a main conveying pipe, the ends of the main conveying pipe are respectively connected to a first branch pipe and a second branch pipe, the end of the first branch pipe is connected to a first circulation pump, and the end of the second branch pipe is connected to a second circulation pump, and a first valve is installed at the connection between the main conveying pipe and the first branch pipe and the second branch pipe to control the conduction of the first branch pipe, the second branch pipe and the main conveying pipe through the first valve, the output end of the first circulation pump and the output end of the second circulation pump are both conductively connected to the wet scrubber for treating the gas inside the wet scrubber, and the first spray pipe and the second spray pipe are installed in sequence from bottom to top inside the wet scrubber, the output end of the first circulation pump is conductively connected to the first spray pipe through a first supplementary water pipe, and the output end of the second circulation pump is conductively connected to the second spray pipe through a second supplementary water pipe.

[0013] In one embodiment of the present invention, the cleaning mechanism includes a cleaning water tank, the outer wall of the cleaning water tank is conductively connected to a main cleaning pipe, a flushing water pump conductively connected to the main cleaning pipe is installed inside the cleaning water tank, the outer wall of the main cleaning pipe is conductively connected to two auxiliary cleaning pipes, the two auxiliary cleaning pipes are respectively conductively connected to the two ends of the main delivery pipe to output water to clean the inside of the main delivery pipe, a second valve is installed at the connection between the auxiliary cleaning pipe and the main delivery pipe, and a cleaning nozzle is installed at the internal connection where the auxiliary cleaning pipe is inserted into the main delivery pipe to clean the inside of the main delivery pipe through the cleaning nozzle, the outer wall of the main delivery pipe is conductively connected to a recovery hose, the other end of the recovery hose is connected to a recovery water tank, and the recovery water tank is used to recover the cleaning water after cleaning the main delivery pipe.

[0014] In one embodiment of the present invention, the main delivery pipe includes a first fixed section, a movable section and a second fixed section, one end of the first fixed section is conductively connected to the caustic soda storage tank, one end of the second fixed section is conductively connected to one end of the second branch pipe, the other end of the first fixed section and the other end of the second fixed section are respectively movably connected to the two ends of the movable section, and a lifting device is installed on the outside of the movable section. The lifting device is used to continuously adjust the height of the movable section up and down when cleaning the main delivery pipe, and the two auxiliary cleaning pipes are respectively conductively connected to the first fixed section and the second fixed section to inject cleaning water to clean the inside of the first fixed section, the movable section and the second fixed section.

[0015] In one embodiment of the present invention, the movable section includes a first inclined tube and a second inclined tube, the first inclined tube and the second inclined tube are conductively connected via a spliced ​​hose, the first inclined tube is movably connected to the first fixed section, and the second inclined tube is movably connected to the second fixed section, the lifting device is installed at the bottom end of the spliced ​​hose to adjust the height of the spliced ​​hose, the bottom of the spliced ​​hose is conductively connected to a recovery tube, and a third valve is installed at the top end of the recovery tube to control the conduction between the recovery tube and the spliced ​​hose through the third valve, and the recovery tube is conductively connected to the recovery hose to discharge the cleaned water into the recovery water tank through the recovery hose.

[0016] In one embodiment of the present invention, the caustic soda conveying mechanism further includes a mixing drum, which is conductively connected to the recovery water tank, and the mixing drum is conductively connected to the first branch pipe and the second branch pipe respectively through two connecting pipes, and a water pump conductively connected to the connecting pipes is installed inside the mixing drum.

[0017] In one embodiment of the present invention, the dehumidification mechanism includes a dehumidification water tank, which is conductively connected to the second circulation pump through a water supply pipe, and a fourth valve is installed on the water supply pipe. The cooling mechanism includes a cooling cylinder with coolant inside, and the output end of the second circulation pump is connected to the conductive water pipe. A cooling main pipe conductively connected to the conductive water pipe is installed inside the cooling cylinder, and the end of the cooling main pipe is conductively connected to the second supplementary water pipe. A plurality of fan-shaped cooling plates are evenly installed inside the cooling cylinder, and a cooling groove is provided inside the fan-shaped cooling plate, and the bottom of the cooling groove is conductively connected to the bottom end of the cooling main pipe through a connecting bottom pipe, and the top of the cooling groove is conductively connected to the top through a connecting top pipe, and a first solenoid valve is installed on the connecting bottom pipe, and a second solenoid valve is installed on the connecting top pipe.

[0018] In one embodiment of the present invention, the fan-shaped cooling plate includes a first movable plate and a second movable plate, the inner end of the first movable plate and the inner end of the second movable plate are both movably connected to the connecting plate, and the top end of the first movable plate and the top end of the second movable plate, and the bottom end of the first movable plate and the bottom end of the second movable plate are fixedly connected by a flexible plate, and the outer end of the first movable plate and the outer end of the second movable plate are fixedly connected by an elastic bending plate, and a plurality of bends are provided on the surface of the elastic bending plate.

[0019] In one embodiment of the present invention, a first electric push rod is installed at one inner end of the connecting plate, the end of the first electric push rod is connected to a support seat, and both ends of the support seat are connected to second electric push rods. The two ends of the second electric push rods are movably connected to the inner side of the first movable plate and the inner side of the second movable plate through hinges, so that the first movable plate and the second movable plate can be pushed by the second electric push rod and the size of the internal space of the fan-shaped cooling plate can be adjusted.

[0020] In one embodiment of the present invention, a return spring is provided on the outer wall of the elastic bending plate, and the return spring is used to cooperate with the second electric push rod to realize automatic return of the first movable plate and the second movable plate.

[0021] As described above, the caustic soda usage optimization device for a wet scrubber for treating waste incineration flue gas according to the present invention has the following beneficial effects:

[0022] The present invention conveys the caustic soda solution to the wet scrubber through a caustic soda conveying mechanism, neutralizes the acidic gas inside the wet scrubber with the caustic soda solution, and after the caustic soda solution is stopped, removes the caustic soda remaining inside the pipeline with a cleaning mechanism, thereby effectively preventing crystallization blockage inside the pipeline and avoiding waste due to excessive injection of caustic soda. At the same time, in the process of cooling the caustic soda solution with the cooling mechanism, the cooling efficiency can be dynamically and selectively adjusted according to the temperature of the acidic gas and the dehumidifying mixed liquid, thereby meeting different requirements and improving the flue gas treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic diagram of the overall structure of the caustic soda usage optimization device for the wet scrubber for treating waste incineration flue gas according to the present invention.

[0024] Figure 2 Shown is a structural schematic diagram of the cooling mechanism in the caustic soda usage optimization device of the wet scrubber for treating waste incineration flue gas according to the present invention.

[0025] Figure 3 Shown is a schematic diagram of the internal structure of the cooling cylinder in the caustic soda usage optimization device of the wet scrubber for treating waste incineration flue gas of the present invention.

[0026] Figure 4 Shown is a top view of the fan-shaped cooling plates in the caustic soda usage optimization device of the wet scrubber for treating waste incineration flue gas according to the present invention. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other unless they conflict.

[0028] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. The illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0029] like Figures 1 to 4 As shown, in one embodiment, the present invention provides a caustic soda usage optimization device for a wet scrubber for treating waste incineration flue gas, comprising:

[0030] Wet scrubber 1, used to scrub the input incineration flue gas;

[0031] a caustic soda storage tank 2, for storing a caustic soda solution, wherein the caustic soda solution is used to remove acidic substances in the incineration flue gas;

[0032] a caustic soda conveying mechanism 3, which is electrically connected to the caustic soda storage tank 2 and the wet scrubber 1, and is used to convey the caustic soda solution in the caustic soda storage tank 2 to the wet scrubber 1;

[0033] a cooling mechanism 4, installed outside the caustic soda conveying mechanism 3, for cooling the caustic soda solution conveyed by the caustic soda conveying mechanism 3;

[0034] a cleaning mechanism 5, which is electrically connected to the caustic soda conveying mechanism 3 and is used to clean the pipeline after the caustic soda conveying mechanism 3 is closed;

[0035] The output end of the caustic soda conveying mechanism 3 is conductively connected to a dehumidifying mechanism 7 , and the dehumidifying mechanism 7 is conductively connected to the wet scrubber 1 and the caustic soda conveying mechanism 3 to perform dehumidification treatment on the inside of the wet scrubber.

[0036] In this embodiment, after the acidic flue gas generated by waste incineration is transported to the wet scrubber, the caustic soda solution in the caustic soda storage tank 2 is transported to the wet scrubber 1 via the caustic soda transport mechanism 3 to neutralize the acidic flue gas. After the caustic soda solution in the caustic soda storage tank 2 is discharged by the caustic soda transport mechanism 3, the dehumidification mechanism 7 mixes the caustic soda solution and dehumidification solution and transports them together to the wet scrubber, thereby completing the cooling and neutralization process of the acidic flue gas. When the pH value of the transported mixed solution meets the required value, the caustic soda transport mechanism 3 is shut down to stop the delivery of the caustic soda solution. The cleaning mechanism 5 cleans any caustic soda solution remaining in the pipeline to prevent crystallization in the pipeline and affect subsequent delivery. The water from the rinse is then re-mixed with the dehumidification solution from the dehumidification mechanism 7, thereby recycling the caustic soda remaining in the pipeline and improving the utilization efficiency of the caustic soda.

[0037] In some embodiments, the caustic soda conveying mechanism 3 includes a rotating drum 31 installed outside the caustic soda storage tank 2, the rotating drum 31 is conductively connected to the caustic soda storage tank 2 through a connecting pipe 32, and the other side of the rotating drum 31 is conductively connected to a main conveying pipe 33, the ends of the main conveying pipe 33 are respectively connected to a first branch pipe 34 and a second branch pipe 35, the end of the first branch pipe 34 is connected to a first circulation pump 36, and the end of the second branch pipe 35 is connected to a second circulation pump 37, and the connection between the main conveying pipe 33 and the first branch pipe 34 and the second branch pipe 35 is installed with a first valve 38 to control the flow of the first branch pipe 34 and the second branch pipe 35 through the first valve 38. The two branch pipes 35 are connected to the main delivery pipe 33, and the output ends of the first circulation pump 36 and the second circulation pump 37 are both connected to the wet scrubbing tower 1 for treating the gas inside the wet scrubbing tower 1. The first spray pipe 11 and the second spray pipe 12 are installed in sequence from bottom to top inside the wet scrubbing tower 1. The output end of the first circulation pump 36 is connected to the first spray pipe 11 through the first supplementary water pipe 13, and the input end of the second circulation pump 37 is connected to the dehumidification mechanism 7 to receive the dehumidification liquid output by the dehumidification mechanism 7. The output end of the second circulation pump 37 is connected to the second spray pipe 12 through the second supplementary water pipe 14.

[0038] In this embodiment, the caustic soda storage tank 2 transfers the caustic soda solution to the interior of the external rotary drum 31 via an internal channel (not shown). The caustic soda solution is then delivered to a first branch pipe 34 and a second branch pipe 35 via a main delivery pipe 33. The solution is then fed to a first circulation pump 36 and a second circulation pump 37. The first circulation pump 36 mixes the caustic soda solution with a coolant and then delivers the mixture to the interior of the first spray pipe 11 via a first make-up water pipe 13 for delivery to the bottom end of the wet scrubber 1 to perform preliminary acid-base neutralization and cooling on the acidic gases within the wet scrubber 1. Simultaneously, the second circulation pump 37 mixes the caustic soda solution with a dehumidifying liquid delivered by the dehumidifying mechanism 7. After the mixture is cooled by the cooling mechanism 4, the mixture is delivered to the second spray pipe 12 within the wet scrubber 1 via a second make-up water pipe 14 for secondary cooling of the gases within the wet scrubber 1, thereby enhancing the neutralization and cooling effect on the acidic flue gas.

[0039] In some embodiments, the cleaning mechanism 5 includes a cleaning water tank 51, the outer wall of which is connected to a main cleaning pipe 52, a flushing water pump 55 connected to the main cleaning pipe 52 is installed inside the cleaning water tank 51, the outer wall of the main cleaning pipe 52 is connected to two auxiliary cleaning pipes 521, the two auxiliary cleaning pipes 521 are respectively connected to the two ends of the main delivery pipe 33 to output water to clean the inside of the main delivery pipe 33, a second valve 522 is installed at the connection between the auxiliary cleaning pipe 521 and the main delivery pipe 33, and a cleaning nozzle 523 is installed at the internal connection of the auxiliary cleaning pipe 521 inserted into the main delivery pipe to clean the inside of the main delivery pipe 33 through the cleaning nozzle 523, the outer wall of the main delivery pipe 33 is connected to a recovery hose 53, the other end of the recovery hose 53 is connected to a recovery water tank 54, and the recovery water tank 54 is used to recover the cleaning water after cleaning the main delivery pipe 33.

[0040] In this embodiment, the cleaning mechanism 5 is provided. When the caustic soda solution in the caustic soda storage tank 2 is no longer needed, for example, when the pH values ​​of the dehumidifying liquid and the coolant are both higher than the set value for a long time, the valve (not shown) installed on the main delivery pipe 33 is closed, and the pipeline of the caustic soda delivery mechanism 3 is cleaned by the cleaning mechanism 5. This ensures that after the delivery of the caustic soda solution stops, crystallization will not occur in the main delivery pipe 33 due to accumulation of the caustic soda solution, and there is no need to keep the valve on the main delivery pipe 33 open for a long time to prevent crystallization, which would result in waste of caustic soda solution. Specifically, when cleaning is required, first close the first valve 38 at the connection between the main delivery pipe 33 and the first branch pipe 34 and the second branch pipe 35, and then open the second valve 522 to output the water inside the cleaning water tank 51 through the main cleaning pipe 52 via the flushing water pump 55, and input the water from both ends of the main delivery pipe 33 into the main delivery pipe 33 through the two auxiliary cleaning pipes 521 to clean the caustic soda solution remaining in the main delivery pipe 33, and the clean water after cleaning is discharged from the recovery hose 53 and enters the recovery water tank 54, so as to facilitate the subsequent secondary utilization of the recovered cleaning water.

[0041] Furthermore, the main delivery pipe 33 includes a first fixed section 331, a movable section 332 and a second fixed section 333. One end of the first fixed section 331 is conductively connected to the caustic soda storage tank 2, and one end of the second fixed section 333 is conductively connected to one end of the second branch pipe 35. The other end of the first fixed section 331 and the other end of the second fixed section 333 are respectively movably conductively connected to both ends of the movable section 332. A lifting device 8 is installed on the outside of the movable section 332. The lifting device 8 is used to continuously adjust the height of the movable section 332 up and down when cleaning the main delivery pipe 33, and the two auxiliary cleaning pipes 521 are respectively conductively connected to the first fixed section 331 and the second fixed section 333 to inject cleaning water to clean the inside of the first fixed section 331, the movable section 332 and the second fixed section 333.

[0042] In which, the movable section 332 includes a first inclined tube 3321 and a second inclined tube 3322, and the first inclined tube 3321 and the second inclined tube 3322 are conductively connected via a splicing hose 3323. The first inclined tube 3321 is movably connected to the first fixed section 331, and the second inclined tube 3322 is movably connected to the second fixed section 333. The lifting device 8 is installed at the bottom end of the splicing hose 3323 to adjust the height of the splicing hose 3323. The bottom of the splicing hose 3323 is conductively connected to a recovery tube 3324, and a third valve 3325 is installed at the top end of the recovery tube 3324 to control the communication between the recovery tube 3324 and the splicing hose 3323 through the third valve 3325. The recovery tube 3324 is conductively connected to the recovery hose 53 to discharge the cleaned water into the recovery water tank 54 through the recovery hose 53.

[0043] In this embodiment, after water from the wash water tank 51 is discharged through the main wash pipe 52 and fed into the main delivery pipe 33 from both ends via the two auxiliary wash pipes 521, the wash water then flows from the auxiliary wash pipes 521 into the first fixed section 331 and the second fixed section 333, respectively, before merging within the movable section 332, thereby cleaning the entire main delivery pipe 33. During the cleaning process, the wash water enters the main delivery pipe 33 from the two auxiliary wash pipes 521. First, the wash water flows through the first and second fixed sections 331 and 333, respectively, cleaning the inner walls of the first and second fixed sections 331 and 333. The water then merges within the movable section 332 to further clean the interior of the movable section 332. During the flushing process, the movable section 332 is continuously raised and lowered by the lifting device 8 to adjust its height, thereby enhancing the cleaning effect of the caustic soda solution on the inner walls of the movable section 332.

[0044] Exemplarily, since the movable section 332 includes a first inclined tube 3321 and a second inclined tube 3322, the first inclined tube 3321 and the second inclined tube 3322 are connected via a splicing hose 3323, the first inclined tube 3321 is movably connected to the first fixed section 331, and the second inclined tube 3322 is movably connected to the second fixed section 333. During the cleaning process, the height of the entire movable section 332 is continuously adjusted up and down by the lifting device 8, so that the caustic soda solution inside the first inclined tube 3321 and the second inclined tube 3322 is fully rinsed, and after the cleaning is completed. The lifting device 8 is lowered so that the first inclined tube 3321 and the second inclined tube 3322 are tilted inward and downward, so that the water flow after flushing can be gathered in the spliced ​​hose 3323 between the first inclined tube 3321 and the second inclined tube 3322, and the cleaning water gathered in the spliced ​​hose 3323 is discharged into the recovery barrel 3324 by opening the third valve 3325, so that the cleaned water can be discharged into the recovery water tank 54 through the recovery hose 53 for subsequent secondary utilization, thereby reducing the waste of caustic soda.

[0045] In some further embodiments, the caustic soda conveying mechanism 3 also includes a mixing drum 39, which is conductively connected to the recovery water tank 54, and the mixing drum 39 is conductively connected to the first branch pipe 34 and the second branch pipe 35 through two connecting pipes 391, and a water pump (not shown in the figure) is installed inside the mixing drum 39 and is conductively connected to the connecting pipes 391, so that the solution in the mixing drum 39 is conveyed outward through the connecting pipes 391 by the water pump.

[0046] In this embodiment, after the water after cleaning the main delivery pipe 33 is recovered into the recovery water tank 54, the connecting pipe 391 is used to mix the water source inside the recovery water tank 54 and the water source inside the cleaning water tank 51 for use. This not only allows the residual caustic soda solution to be recycled, but also facilitates the adjustment of the pH value in the mixing drum 39 by mixing the water sources inside the recovery water tank 54 and the cleaning water tank 51, so that the pH value in the mixing drum 39 can be output to the first circulation pump 36 and the second circulation pump 37 through the first branch pipe 34 and the second branch pipe 35, and then enter the spray pipes at different heights inside the wet scrubbing tower 1 to spray the acidic flue gas.

[0047] In some other embodiments, the dehumidification mechanism 7 includes a dehumidification water tank 71, which is conductively connected to the second circulation pump 37 through a water supply pipe 72, and a fourth valve 74 is installed on the water supply pipe 72. The cooling mechanism 4 includes a cooling cylinder 41 with coolant inside, and the output end of the second circulation pump 37 is connected to a conductive water pipe 73. A cooling main pipe 42 conductively connected to the conductive water pipe 73 is installed inside the cooling cylinder 41, and the end of the cooling main pipe 42 is conductively connected to the second supplementary water pipe 14. A plurality of fan-shaped cooling plates 43 are evenly installed inside the cooling cylinder 41, and a cooling groove 44 is provided inside the fan-shaped cooling plate 43, and the bottom of the cooling groove 44 is conductively connected to the bottom end of the cooling main pipe 42 through a connecting bottom pipe 45, and the top of the cooling groove 44 is conductively connected to the top of the cooling main pipe 42 through a connecting top pipe 47, and a first solenoid valve 48 is installed on the connecting bottom pipe 45, and a second solenoid valve 46 is installed on the connecting top pipe 47.

[0048] In this embodiment, the dehumidifying liquid in the dehumidifying water tank 71 is delivered to the second circulation pump 37 via the water supply pipe 72. This allows the dehumidifying liquid to mix with the caustic soda solution delivered to the second circulation pump 37, as well as with the wash water delivered to the second circulation pump 37 from the mixing drum 39. The dehumidifying liquid is ultimately delivered to the wet scrubber 1 via the second make-up water pipe 14, thereby neutralizing the acidic flue gas. Furthermore, the cooling mechanism 4 is provided to effectively cool the solution delivered from the second circulation pump 37. This ensures that the acidic flue gas is cooled after being delivered to the wet scrubber 1 via the second make-up water pipe 14, facilitating subsequent discharge.

[0049] Because the flue gas discharged into the wet scrubber 1 varies in temperature, the corresponding coolant temperature also needs to be dynamically adjusted to meet varying requirements. Therefore, by providing a cooling mechanism 4, the dehumidifying liquid in the dehumidifying water tank 71 and the solution output from the second branch pipe 35 are mixed, then flow through the conductive water pipe 73 into the cooling main pipe 42 for cooling. After cooling, the mixed solution is output to the second make-up water pipe 14 for delivery throughout the wet scrubber 1. During the cooling process of the mixed liquid by the cooling mechanism 4, the first solenoid valve 48 and the second solenoid valve 46 are opened according to the actual situation, so that the mixed liquid to be cooled can enter the multiple fan-shaped cooling plates 43 to accelerate cooling, thereby improving the cooling efficiency. When the flue gas temperature inside the wet scrubber 1 is high, each of the first solenoid valve 48 and the second solenoid valve 46 is opened, so that the mixed liquid can be accelerated to cool through the multiple fan-shaped cooling plates 43. When the flue gas temperature inside the wet scrubber 1 is relatively high, only some of the first solenoid valves 48 and the second solenoid valves 46 need to be opened to accelerate cooling through some of the fan-shaped cooling plates 43. When the flue gas temperature inside the wet scrubber 1 is normal, the first solenoid valve 48 and the second solenoid valve 46 can be closed to cool the mixed liquid directly through the cooling main pipe 42. This can meet the cooling requirements of different situations and is more practical.

[0050] In some other embodiments, the fan-shaped cooling plate 43 includes a first movable plate 431 and a second movable plate 432, the inner end of the first movable plate 431 and the inner end of the second movable plate 432 are both movably connected to the connecting plate 433, and the top of the first movable plate 431 and the top of the second movable plate 432, and the bottom of the first movable plate 431 and the bottom of the second movable plate 432 are fixedly connected by a flexible plate 434, and the outer end of the first movable plate 431 and the outer end of the second movable plate 432 are fixedly connected by an elastic bending plate 435, and the elastic The surface of the bending plate 435 is provided with multiple bends 436, and the first electric push rod 437 is installed at one end of the inner part of the connecting plate 433, and the end of the first electric push rod 437 is connected to the support seat 438, and the two ends of the support seat 438 are connected to the second electric push rod 439, and the ends of the two second electric push rods 439 are movably connected to the inner side of the first movable plate 431 and the inner side of the second movable plate 432 through the hinge 4391, so as to push the first movable plate 431 and the second movable plate 432 through the second electric push rod 439 and adjust the size of the internal space of the fan-shaped cooling plate 43.

[0051] In this embodiment, the cooling of the dehumidifying liquid mixture by the fan-shaped cooling plate 43 is dynamically adjusted based on the temperature of the dehumidifying liquid mixture and the temperature of the acidic flue gas to be treated. When the temperature of the dehumidifying liquid mixture and the temperature of the acidic flue gas are high, the cooling rate of the dehumidifying liquid mixture needs to be accelerated. By pushing the first electric push rod 437 and the second electric push rod 439 to adjust the distance between the first movable plate 431 and the second movable plate 432, the space within the cooling tank 44 within the fan-shaped cooling plate 43 is adjusted to adjust the cooling rate.

[0052] Specifically, when the cooling rate needs to be accelerated, after opening the first solenoid valve 48 and the second solenoid valve 46 above and below the fan-shaped cooling plate 43, the second electric push rod 439 is pushed outward, and in conjunction with the outward movement of the first electric push rod 437, the second electric push rod 439 pushes the first movable plate 431 and the second movable plate 432 to expand outward, thereby increasing the space inside the entire fan-shaped cooling plate 43 to accommodate more mixed liquid and increase the cooling rate. When the cooling rate does not need to be accelerated, the first electric push rod 437 and the second electric push rod 439 are retracted inward to reduce the space inside the fan-shaped cooling plate 43. Alternatively, the first solenoid valve 48 and the second solenoid valve 46 of the corresponding fan-shaped cooling plate 43 can be directly closed to ensure that the current fan-shaped cooling plate 43 does not participate in cooling, thereby meeting different cooling requirements.

[0053] In yet other embodiments, a return spring 6 is provided on the outer wall of the elastic bending plate 435. The return spring 6 is used to cooperate with the second electric push rod 439 to automatically reset the first movable plate 431 and the second movable plate 432. By providing the return spring 6, when the size of the fan-shaped cooling plate 43 needs to be reduced, as the second electric push rod 439 contracts, the return spring 6 also contracts, providing power to move the first movable plate 431 and the second movable plate 432 inward, making the adjustment and reset of the first movable plate 431 and the second movable plate 432 more convenient.

[0054] In summary, the caustic soda usage optimization device for a wet scrubber for treating waste incineration flue gas described in the present invention transports a caustic soda solution into the wet scrubber via a caustic soda conveying mechanism, neutralizes the acidic gas inside the wet scrubber using the caustic soda solution, and after the caustic soda solution is stopped, removes the caustic soda remaining inside the pipeline using a cleaning mechanism, thereby effectively preventing crystallization blockage inside the pipeline and avoiding waste due to excessive caustic soda injection. At the same time, during the process of cooling the caustic soda solution using a cooling mechanism, the cooling efficiency of the cooling mechanism can be dynamically adjusted according to the temperature of the acidic gas and the dehumidifying mixed liquid to meet different requirements and improve the flue gas treatment efficiency. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has high industrial utilization value.

[0055] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A caustic soda usage optimization device for a wet scrubber used for treating waste incineration flue gas, characterized in that: include: Wet scrubber, used to scrub the incoming incineration flue gas; a caustic soda storage tank, used to store caustic soda solution, wherein the caustic soda solution is used to remove acidic substances in the incineration flue gas; a caustic soda conveying mechanism, respectively connected to the caustic soda storage tank and the wet scrubber, for conveying the caustic soda solution in the caustic soda storage tank to the wet scrubber; a cooling mechanism installed outside the caustic soda conveying mechanism, for cooling the caustic soda solution conveyed by the caustic soda conveying mechanism; a cleaning mechanism conductively connected to the caustic soda conveying mechanism, for cleaning the pipeline after the caustic soda conveying mechanism is shut down; wherein the output end of the caustic soda conveying mechanism is conductively connected to a dehumidifying mechanism, and the dehumidifying mechanism is conductively connected to the wet scrubber and the caustic soda conveying mechanism to dehumidify the interior of the wet scrubber; The caustic soda conveying mechanism includes a rotating drum installed outside the caustic soda storage tank, the rotating drum is conductively connected to the caustic soda storage tank through a connecting pipe, and the other side of the rotating drum is conductively connected to a main conveying pipe, the ends of the main conveying pipe are respectively connected to a first branch pipe and a second branch pipe, the end of the first branch pipe is connected to a first circulation pump, and the end of the second branch pipe is connected to a second circulation pump, and a first valve is installed at the connection between the main conveying pipe and the first branch pipe and the second branch pipe to control the conduction of the first branch pipe, the second branch pipe and the main conveying pipe through the first valve, the output end of the first circulation pump and the output end of the second circulation pump are conductively connected to the wet scrubber for treating the gas inside the wet scrubber, and the first spray pipe and the second spray pipe are sequentially installed inside the wet scrubber from bottom to top, the output end of the first circulation pump is conductively connected to the first spray pipe through a first supplementary water pipe, and the output end of the second circulation pump is conductively connected to the second spray pipe through a second supplementary water pipe; The cleaning mechanism includes a cleaning water tank, the outer wall of the cleaning water tank is conductively connected to a main cleaning pipe, a flushing water pump conductively connected to the main cleaning pipe is installed inside the cleaning water tank, the outer wall of the main cleaning pipe is conductively connected to two auxiliary cleaning pipes, the two auxiliary cleaning pipes are respectively conductively connected to the two ends of the main delivery pipe to output water to clean the inside of the main delivery pipe, a second valve is installed at the connection between the auxiliary cleaning pipe and the main delivery pipe, and a cleaning nozzle is installed at the internal connection of the auxiliary cleaning pipe inserted into the main delivery pipe to clean the inside of the main delivery pipe through the cleaning nozzle, the outer wall of the main delivery pipe is conductively connected to a recovery hose, the other end of the recovery hose is connected to a recovery water tank, and the recovery water tank is used to recover the cleaning water after cleaning the main delivery pipe; The main delivery pipe includes a first fixed section, a movable section and a second fixed section. One end of the first fixed section is conductively connected to the caustic soda storage tank, one end of the second fixed section is conductively connected to one end of the second branch pipe, the other end of the first fixed section and the other end of the second fixed section are respectively movably conductively connected to both ends of the movable section. A lifting device is installed on the outside of the movable section. The lifting device is used to continuously adjust the height of the movable section up and down when cleaning the main delivery pipe, and the two auxiliary cleaning pipes are respectively conductively connected to the first fixed section and the second fixed section to inject cleaning water to clean the inside of the first fixed section, the movable section and the second fixed section.

2. The caustic soda usage optimization device for a wet scrubber for treating waste incineration flue gas according to claim 1, characterized in that: The movable section includes a first inclined tube and a second inclined tube, the first inclined tube and the second inclined tube are conductively connected via a spliced ​​hose, the first inclined tube is movably connected to the first fixed section, and the second inclined tube is movably connected to the second fixed section, the lifting device is installed at the bottom end of the spliced ​​hose to adjust the height of the spliced ​​hose, the bottom of the spliced ​​hose is conductively connected to a recovery drum, and a third valve is installed at the top end of the recovery drum to control the conduction between the recovery drum and the spliced ​​hose through the third valve, and the recovery drum is conductively connected to the recovery hose to discharge the cleaned water into the recovery water tank through the recovery hose.

3. The caustic soda usage optimization device for a wet scrubber for treating waste incineration flue gas according to claim 2, characterized in that: The caustic soda conveying mechanism also includes a mixing drum, which is conductively connected to the recovery water tank and is conductively connected to the first branch pipe and the second branch pipe respectively through two connecting pipes, and a water pump conductively connected to the connecting pipes is installed inside the mixing drum.

4. The caustic soda usage optimization device for a wet scrubber for treating waste incineration flue gas according to claim 1, characterized in that: The dehumidification mechanism includes a dehumidification water tank, which is conductively connected to the second circulation pump through a water supply pipe, and a fourth valve is installed on the water supply pipe. The cooling mechanism includes a cooling cylinder with coolant inside, and the output end of the second circulation pump is connected to the conductive water pipe. A cooling main pipe conductively connected to the conductive water pipe is installed inside the cooling cylinder, and the end of the cooling main pipe is conductively connected to the second supplementary water pipe. A plurality of fan-shaped cooling plates are evenly installed inside the cooling cylinder, and a cooling groove is provided inside the fan-shaped cooling plate, and the bottom of the cooling groove is conductively connected to the bottom end of the cooling main pipe through a connecting bottom pipe, and the top of the cooling groove is conductively connected to the top end of the cooling main pipe through a connecting top pipe, and a first solenoid valve is installed on the connecting bottom pipe, and a second solenoid valve is installed on the connecting top pipe.

5. The caustic soda usage optimization device for a wet scrubber for treating waste incineration flue gas according to claim 4, characterized in that: The fan-shaped cooling plate includes a first movable plate and a second movable plate, the inner end of the first movable plate and the inner end of the second movable plate are both movably connected to the connecting plate, and the top end of the first movable plate and the top end of the second movable plate, as well as the bottom end of the first movable plate and the bottom end of the second movable plate are fixedly connected by a flexible plate, and the outer end of the first movable plate and the outer end of the second movable plate are fixedly connected by an elastic bending plate, and a plurality of bends are provided on the surface of the elastic bending plate.

6. The caustic soda usage optimization device for a wet scrubber for treating waste incineration flue gas according to claim 5, characterized in that: A first electric push rod is installed at one inner end of the connecting plate, and the end of the first electric push rod is connected to a support seat. Both ends of the support seat are connected to second electric push rods, and the ends of the two second electric push rods are movably connected to the inner side of the first movable plate and the inner side of the second movable plate through hinges, so that the first movable plate and the second movable plate can be pushed by the second electric push rod and the size of the internal space of the fan-shaped cooling plate can be adjusted.

7. The caustic soda usage optimization device for a wet scrubber for treating waste incineration flue gas according to claim 6, characterized in that: A return spring is provided on the outer wall of the elastic bending plate, and the return spring is used to cooperate with the second electric push rod to realize automatic return of the first movable plate and the second movable plate.

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