Desulfurization, denitrification, dust removal and ultra-low emission device of heat supply chain boiler

Abstract

The invention provides a heat supply chain boiler desulfurization, denitrification and dust removal ultralow emission device, and relates to the technical field of desulfurization and denitrification of water turbine boilers, the heat supply chain boiler desulfurization, denitrification and dust removal ultralow emission device comprises a filtering tank, and a gas mixing assembly is fixedly connected into the filtering tank; a spraying assembly; the spraying assembly is arranged at the bottom end in the filtering tank and comprises a backflow column fixedly connected to the bottom end in the filtering tank, the top end of the backflow column is fixedly connected with an inner side ring, the outer side of the backflow column is fixedly connected with a first water pump, and the output end of the first water pump is fixedly connected with an output tank; according to the design, through a multi-stage treatment process, waste gas and a desulfurization and denitrification agent are subjected to full contact reaction, pollutants such as sulfur dioxide, nitric oxide and dust are effectively removed, water resource and agent consumption is reduced, the operation cost is reduced, the waste gas enters through the gas inlet pipe, then is uniformly diffused through the air outlet holes, is pre-wetted through the water return net and then is in reverse contact with the liquid curtain, and the liquid curtain is in reverse contact with the liquid curtain. And the gas-liquid contact time is prolonged through secondary spraying treatment of the shunting column, and the dust removal efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of desulfurization and denitration of turbine boilers, and in particular to an ultra-low emission device for desulfurization, denitration and dust removal of a heating chain boiler. Background Art

[0002] The desulfurization, denitrification and dust removal device for heating chain boilers is a device used to reduce the emission of harmful gases and dust and other pollutants generated by heating chain boilers during the combustion process. This device usually integrates multiple treatment technologies to ensure that the exhaust gas meets environmental protection standards;

[0003] Some traditional boiler desulfurization and denitrification devices use single-time spraying or fixed atomization structures, which have problems such as insufficient contact area between the reagent and the exhaust gas, and short reaction time due to uneven droplet size. As a result, unreacted desulfurization and denitrification agents are directly discharged with high-concentration waste liquid, which not only pushes up the cost of steam treatment per ton, but also causes secondary pollution such as excessive water hardness and ammonia escape.

[0004] Therefore, in order to solve the above problems, an ultra-low emission device for desulfurization, denitrification and dust removal of a heating chain boiler is proposed. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and provide an ultra-low emission device for desulfurization, denitrification and dust removal of a heating chain boiler, comprising a filter tank, the interior of which is fixedly connected with a gas mixing component;

[0006] A spray assembly; the spray assembly is placed at the inner bottom end of the filter tank, the spray assembly includes a reflux column fixedly connected to the inner bottom end of the filter tank, the top of the reflux column is fixedly connected to an inner ring, the outer side of the reflux column is fixedly connected to a water pump 1, the output end of the water pump 1 is fixedly connected to an output tank, the end of the output tank away from the water pump 1 is fixedly connected to a liquid diversion pipe, the inner side of the liquid diversion pipe is fixedly connected to a water outlet head, the end of the water outlet head away from the liquid diversion pipe is fixedly connected to a guide pipe, the bottom end of the guide pipe is fixedly connected to a dispersion frame, and the outer side of the spray assembly is fixedly connected to a water control assembly;

[0007] Dispersion component; the dispersion component is placed inside the filter tank, the dispersion component includes an air inlet pipe fixedly connected to the inside of the filter tank, one end of the air inlet pipe is fixedly connected to an air induced column, the bottom end of the air induced column is provided with an air outlet, the top of the air induced column is fixedly connected to a return water network, the top of the inner circle is fixedly connected to a wind shield frame, the top of the wind shield frame is fixedly connected to the air outlet pipe, and the interior of the dispersion component is fixedly connected to a diversion component.

[0008] Preferably, a positioning frame is fixedly connected to the outer side of the liquid diversion pipe, one end of the positioning frame away from the liquid diversion pipe is fixedly connected to the filter tank, and the outer side of the dispersion frame is fixedly connected to the air outlet pipe.

[0009] Preferably, the return water net and the wind shield frame are symmetrically designed and are both conical, the bottom end of the air induced column is fixedly connected to the inner circle, the outer side of the air outlet pipe passes through the filter tank and extends outward, and the outer side of the return water net is fixedly connected to the inner wall of the inner circle.

[0010] Preferably, the diversion assembly includes a diversion column fixedly connected to the inside of the air outlet pipe, a sprinkler ring is fixedly connected to the inside of the diversion column, a water guide frame is fixedly connected to the top of the diversion column, and a return water column is fixedly connected to the inside of the water guide frame.

[0011] Preferably, the top of the filter tank is fixedly connected to a water tank, the top of the filter tank is fixedly connected to a water pump 2, the output end of the water pump 2 is fixedly connected to a sprinkler ring, the input end of the water pump 2 is fixedly connected to the water tank, and the bottom end of the return water column is fixedly connected to the top of the water tank.

[0012] Preferably, the gas mixing assembly includes an ozone tube fixedly connected to the inside of the filter tank, one end of the ozone tube is fixedly connected to an air distribution pipe, the outer bottom end of the air distribution pipe is fixedly connected to an air guide pipe, and the outer side of the air guide pipe is fixedly connected to the inside of the wind shield frame.

[0013] Preferably, the water control component includes a bottom guide water pipe fixedly connected to the outside of the reflux column, an electronic switch valve is fixedly connected to the outside of the bottom guide water pipe, a mounting bracket is fixedly connected to the outside of the electronic switch valve, and the mounting bracket is fixedly connected to the outside of the filter tank.

[0014] Preferably, the bottom end of the reflux column is fixedly connected to a containing frame, a switch door plate is installed on the outer side of the filter tank, and the outer side of the water pump 1 is installed on the top of the containing frame.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are:

[0016] 1. Through the linkage design of the reflux column and the spraying assembly, the water pump pumps the bottom liquid to the output tank, and evenly distributes it to the water outlet and the guide pipe through the liquid diversion pipe, and finally forms a uniform liquid curtain by the dispersion frame, and the unreacted liquid is recycled through the reflux column; with this design, through the multi-stage treatment process, the exhaust gas and the desulfurization and denitrification agent are fully contacted and reacted, effectively removing pollutants such as sulfur dioxide, nitrogen oxides and dust, reducing water resources and agent consumption, and reducing operating costs;

[0017] 2. The conical symmetrical design of the air induction column and the wind shield frame is adopted. After the exhaust gas enters through the air inlet pipe, it is evenly diffused through the air outlet, and then contacts the liquid curtain in reverse after being pre-wetted by the return water network, and then is sprayed for the second time by the diversion column. With this design, the multi-stage dispersion prolongs the gas-liquid contact time and improves the dust removal efficiency, thereby greatly improving the desulfurization efficiency;

[0018] 3. The temperature of liquid at different levels is collected in real time through the bottom diversion water pipe. The electronic switch valve automatically adjusts the return flow according to the temperature difference, and the temperature balance is achieved by combining the heat exchange between the water tank and the return water column. With this design, the temperature fluctuation of the liquid is greatly reduced, avoiding the failure of the agent caused by local overheating, thereby improving the reaction efficiency and stability, and effectively solving the problem of decreased agent activity caused by temperature stratification in traditional systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of an ultra-low emission device for desulfurization, denitration and dust removal for a heating chain boiler provided by the present invention;

[0020] Figure 2 A rear view of an ultra-low emission device for desulfurization, denitration and dust removal for a heating chain boiler provided by the present invention;

[0021] Figure 3 A schematic diagram of the internal structure of a filter tank of an ultra-low emission device for desulfurization, denitration and dust removal for a heating chain boiler provided by the present invention;

[0022] Figure 4 A schematic diagram of the structure of dispersed components of an ultra-low emission device for desulfurization, denitration and dust removal for a heating chain boiler provided by the present invention;

[0023] Figure 5 A schematic diagram of the structure of a spraying assembly of an ultra-low emission device for desulfurization, denitration and dust removal for a heating chain boiler provided by the present invention;

[0024] Figure 6 A schematic diagram of the structure of a water control component of an ultra-low emission device for desulfurization, denitration and dust removal of a heating chain boiler provided by the present invention;

[0025] Figure 7 A schematic diagram of the structure of a gas mixing component of an ultra-low emission device for desulfurization, denitration and dust removal of a heating chain boiler provided by the present invention;

[0026] Figure 8 A schematic diagram of the structure of a shunt component of an ultra-low emission device for desulfurization, denitration and dust removal for a heating chain boiler provided by the present invention;

[0027] Fig. 9 A schematic diagram of the return water column structure of an ultra-low emission device for desulfurization, denitrification and dust removal of a heating chain boiler provided by the present invention.

[0028] 1. Filter tank;

[0029] 2. Spraying assembly; 21. Reflux column; 22. Inner ring; 23. Water pump 1; 24. Output tank; 25. Liquid diversion pipe; 26. Water outlet head; 27. Flow guide pipe; 28. Dispersion frame; 29. ​​Positioning frame;

[0030] 3. Dispersion components; 31. Air inlet pipe; 32. Air induction column; 33. Air outlet; 34. Water return net; 35. Wind shield frame; 36. Air outlet pipe;

[0031] 4. Diversion assembly; 41. Diversion column; 42. Sprinkler ring; 43. Water guide frame; 44. Water return column; 45. Water tank; 46. Water pump 2;

[0032] 5. Gas mixing assembly; 51. Ozone tube; 52. Gas distribution pipe; 53. Gas guide pipe;

[0033] 6. Water control assembly; 61. Bottom water guide pipe; 62. Electronic switch valve; 63. Mounting frame;

[0034] 7. Storage rack; 8. Open and close door panel. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figure 1 and Figure 4 As shown, this embodiment provides a technical solution: a heating chain boiler desulfurization, denitrification and dust removal ultra-low emission device, comprising a filter tank 1, a receiving frame 7 is fixedly connected to the bottom end of the reflux column 21, and a switch door plate 8 is installed on the outer side of the filter tank 1;

[0037] The filter tank 1 is the main reaction container of the whole desulfurization, denitration and dust removal device, which accommodates various reaction components and gas flow channels, and provides a place for desulfurization, denitration and dust removal reactions. The reflux column 21 connects the spray component 2 and the bottom of the filter tank 1 to realize the circulation and reflux of the liquid, and guides the reacted liquid back to the bottom of the filter tank 1 for reprocessing or discharge, so as to promote the recycling of the liquid, improve the utilization rate of the desulfurization and denitration agent, and reduce waste. The accommodating frame 7 provides a stable support and installation foundation for the spray component 2 such as the water pump 23, ensures the stability of the equipment during operation, improves the reliability and safety of the equipment, and prolongs the service life of the equipment. The switch door panel 8 is convenient for the operator to inspect, maintain and clean the inside of the filter tank 1, and at the same time, it is kept closed during normal operation to prevent gas leakage;

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 ,and Fig. 9As shown, the spray assembly 2 is placed at the inner bottom end of the filter tank 1, and the spray assembly 2 includes a reflux column 21 fixedly connected to the inner bottom end of the filter tank 1, the top of the reflux column 21 is fixedly connected with an inner ring 22, the outer side of the reflux column 21 is fixedly connected with a water pump 23, the outer side of the water pump 23 is installed on the top of the accommodating frame 7, the output end of the water pump 23 is fixedly connected with an output tank 24, the end of the output tank 24 away from the water pump 23 is fixedly connected with a liquid diversion pipe 25, the inner side of the liquid diversion pipe 25 is fixedly connected with a water outlet 26, the end of the water outlet 26 away from the liquid diversion pipe 25 is fixedly connected with a guide pipe 27, the bottom end of the guide pipe 27 is fixedly connected with a dispersion frame 28, the outer side of the liquid diversion pipe 25 is fixedly connected with a positioning frame 29, and the end of the positioning frame 29 away from the liquid diversion pipe 25 is fixedly connected to the filter tank 1;The reflux column 21 is the key connection and reflux structure of the spray assembly 2, fixed at the bottom of the filter tank 1, and connected to the inner ring 22 and other components upward. At the same time, a water pump 23 is installed on its outer side to form a liquid circulation loop to ensure that the desulfurization and denitrification reactions continue, realize liquid recycling, improve reaction efficiency, reduce reagent waste, and reduce operating costs. The inner ring 22 is located at the top of the reflux column 21 and cooperates with the windshield frame 35 and other components to guide the airflow direction, ensure that the exhaust gas flows in an orderly manner in the filter tank 1, fully contacts the sprayed desulfurization and denitrification agent, optimizes the airflow distribution, improves the reaction uniformity, enhances the desulfurization and denitrification effect, and reduces pollutant emissions. The water pump 23 is installed in the container The top of the rack 7 provides power for liquid transportation, extracts the liquid at the bottom of the reflux column 21, and transports the desulfurization and denitrification agent and other liquids to the spraying position inside the filter tank 1 through the output tank 24, the liquid diversion pipe 25 and other components, stabilizes the liquid supply, improves the spraying uniformity, enhances the reaction effect, and ensures the continuous operation of the equipment. The output tank 24 is connected to the output end of the water pump 23 to temporarily store the transported liquid, provide a stable liquid source for the liquid diversion pipe 25, balance the liquid pressure, ensure the normal operation of the spray component 2, stabilize the spraying pressure, improve the spraying effect, reduce the impact of pressure fluctuations on the equipment, and extend the service life of the equipment. The liquid diversion pipe 25 diverts the liquid in the output tank 24 To multiple water outlets 26, the liquid is evenly distributed, the spraying coverage is expanded, the exhaust gas is ensured to be fully contacted with the desulfurization and denitrification agent, the liquid dispersion is improved, the reaction effect is enhanced, the pollutant emission is reduced, and the equipment processing capacity is improved. The water outlet 26 serves as a liquid spraying outlet, and the liquid is sprayed in the form of mist or thin stream, which increases the contact area between the liquid and the exhaust gas, promotes the desulfurization and denitrification reaction, increases the reaction rate, improves the treatment effect, reduces the emission concentration, and enhances the environmental protection performance of the equipment. The guide pipe 27 connects the water outlet 26 with the dispersion frame 28, guides the sprayed liquid to flow to the dispersion frame 28, further optimizes the liquid distribution, ensures that the exhaust gas is fully treated, enhances the uniformity of the liquid distribution, and improves Reaction efficiency, reduce equipment resistance, ensure smooth airflow, the dispersion frame 28 is fixed on the air outlet pipe 36, receives the liquid transported by the guide pipe 27, and evenly disperses it into the filter tank 1 to form a liquid curtain or droplets, which are fully mixed and reacted with the exhaust gas, thereby improving the contact effect between the liquid and the exhaust gas, enhancing the desulfurization and denitrification efficiency, reducing the emission value, and improving the overall performance of the equipment. One end of the positioning frame 29 is fixed to the outside of the liquid diversion pipe 25, and the other end is connected to the filter tank 1 to ensure that the liquid diversion pipe 25 is stably installed inside the filter tank 1 to prevent displacement due to gas flow or liquid impact, ensure the stable operation of the spray assembly 2, improve equipment reliability, extend service life, and reduce maintenance workload;

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 ,and Fig. 9As shown, the dispersion component 3 is placed inside the filter tank 1, and the dispersion component 3 includes an air inlet pipe 31 fixedly connected to the inside of the filter tank 1, one end of the air inlet pipe 31 is fixedly connected to an air induction column 32, and an air outlet hole 33 is opened at the bottom end of the air induction column 32, and a return water net 34 is fixedly connected to the top of the inner circle 22, and a wind shield frame 35 is fixedly connected to the top of the wind shield frame 35. The air outlet pipe 36 is fixedly connected, the return water net 34 and the wind shield frame 35 are symmetrically designed and are both conical, the bottom end of the air induction column 32 is fixedly connected to the inner circle 22, and the dispersion frame 28 is fixedly connected to the inner circle 22. The outer side is fixedly connected to the outlet pipe 36, the outer side of the outlet pipe 36 passes through the filter tank 1 and extends outward, and the outer side of the return water network 34 is fixedly connected to the inner wall of the inner circle 22; the air inlet pipe 31 serves as a channel for the exhaust gas to enter the filter tank 1, and introduces the exhaust gas containing pollutants such as sulfur dioxide, nitrogen oxides and dust discharged from the boiler into the filter tank 1 for treatment, so as to realize the centralized treatment of the exhaust gas and reduce the pollution to the environment caused by the direct emission of pollutants. It is the starting link of the whole desulfurization, denitrification and dust removal process. The air induction column 32 guides the flow direction of the exhaust gas inside the filter tank 1, so that the exhaust gas can be evenly distributed and pass through Each treatment component, such as the sprayed desulfurization and denitrification agent, the return water net 34, etc., ensures that the exhaust gas is fully contacted and reacted with the treatment agent, thereby improving the desulfurization and denitrification efficiency. The air outlet 33 serves as the air outlet at the bottom of the air induced column 32, and evenly disperses the exhaust gas to the bottom of the filter tank 1, promotes the exhaust gas to be fully mixed with the liquid sprayed at the bottom, improves the treatment uniformity of the exhaust gas, and avoids the problem of insufficient local treatment. The return water net 34 performs preliminary cooling and humidification on the exhaust gas, and uses the return water net 34 to disperse the mist, so that the pollutants in the exhaust gas are fully contacted with the water vapor, and the water vapor is fully mixed with the exhaust gas, so as to enhance the desulfurization and denitrification reaction. The inner ring 22 cooperates with the wind shield frame 35 to guide the airflow direction, ensure that the exhaust gas flows in an orderly manner in the filter tank 1, and fully contacts the sprayed desulfurization and denitrification agent. The wind shield frame 35 cooperates with the return water network 34 to guide the exhaust gas to flow upward to form a uniform airflow distribution, while preventing the exhaust gas from directly impacting the spraying component 2 above. The air outlet pipe 36 leads the treated exhaust gas from the inside of the filter tank 1 and discharges it into the atmosphere. At the same time, it serves as the installation basis for components such as the dispersion frame 28, realizes the orderly discharge of the exhaust gas, meets environmental protection requirements, is easy to monitor and manage, and ensures that the treated exhaust gas meets the discharge standards;

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8 ,and Fig. 9As shown, the interior of the dispersion component 3 is fixedly connected with a diverter component 4, and the diverter component 4 includes a diverter column 41 fixedly connected to the interior of the air outlet pipe 36, and the interior of the diverter column 41 is fixedly connected with a sprinkler ring 42, and the top of the diverter column 41 is fixedly connected with a water guide frame 43, and the interior of the water guide frame 43 is fixedly connected with a return water column 44, and the top of the filter tank 1 is fixedly connected with a water tank 45, and the top of the filter tank 1 is fixedly connected with a water pump 46, and the output end of the water pump 46 is fixedly connected to the sprinkler ring 42, and the input end of the water pump 46 is fixedly connected to the water tank 45, and the bottom end of the return water column 44 is fixedly connected to the top of the water tank 45;

[0041] The diverter column 41 is installed inside the air outlet pipe 36 to further divert and guide the exhaust gas, so that when the exhaust gas flows out, liquid is sprayed for a second time through the air outlet pipe 36 to further remove pollutants in the exhaust gas and improve the desulfurization and denitrification efficiency. The watering ring 42 forms an annular spraying structure around the diverter column 41 to evenly spray the liquid delivered by the water pump 46 onto the exhaust gas to further remove pollutants in the exhaust gas. The water guide frame 43 connects the watering ring 42 with the return water column 44 to guide the liquid sprayed by the watering ring 42 to flow to the return water column 44, so as to realize the recycling of liquid, reduce the waste of water resources, reduce the operating cost, and improve the efficiency of water resources. The return water column 44 collects the liquid guided by the water guide frame 43 and transports it back to the water tank 45, so as to realize the recycling of the liquid, reduce the amount of fresh water to be added, and improve the recycling rate of water resources. The water tank 45 stores the liquid for spraying, provides a water source for the water pump 46, and at the same time serves as a liquid collection container for the return water column 44 to realize the circulation of the liquid, stabilize the water supply, and improve the utilization efficiency of water resources. The water pump 46 provides liquid power for the sprinkler ring 42, extracts the liquid in the water tank 45 and sprays it onto the exhaust gas through the sprinkler ring 42, so as to realize further purification of the exhaust gas and ensure the continuity and stability of the spraying;

[0042] like Figure 1 , Figure 2 ,and Figure 7 As shown, the inside of the filter tank 1 is fixedly connected with a gas mixing assembly 5, and the gas mixing assembly 5 includes an ozone tube 51 fixedly connected to the inside of the filter tank 1, one end of the ozone tube 51 is fixedly connected to a gas distribution pipe 52, and the outer bottom end of the gas distribution pipe 52 is fixedly connected to an air guide pipe 53, and the outer side of the air guide pipe 53 is fixedly connected to the inside of the windshield frame 35;

[0043] The ozone tube 51 introduces ozone into the filter tank 1, and uses the strong oxidizing property of ozone to oxidize pollutants such as nitrogen oxides in the exhaust gas into substances that are easier to handle. The air distribution pipe 52 evenly distributes the ozone delivered by the ozone tube 51 to each air guide pipe 53 to ensure that the ozone can be fully mixed and reacted with the exhaust gas. The air guide pipe 53 guides the ozone distributed by the air distribution pipe 52 to the inside of the windshield frame 35 to fully contact and react with the exhaust gas, thereby achieving effective treatment of pollutants in the exhaust gas.

[0044] like Figure 1 , Figure 6 ,and Fig. 9 As shown, the outer side of the spray assembly 2 is fixedly connected with a water control assembly 6, and the water control assembly 6 includes a bottom guide water pipe 61 fixedly connected to the outer side of the reflux column 21, and the outer side of the bottom guide water pipe 61 is fixedly connected with an electronic switch valve 62, and the outer side of the electronic switch valve 62 is fixedly connected with a mounting bracket 63, and the mounting bracket 63 is fixedly connected to the outer side of the filter tank 1;

[0045] The bottom guide water pipe 61 collects the liquid at the bottom of the reflux column 21 and guides it to the electronic switch valve 62 to achieve centralized control of the liquid and facilitate the management and utilization of the liquid. The electronic switch valve 62 controls the on-off of the bottom guide water pipe 61 and automatically adjusts the discharge or circulation of the liquid according to the equipment operation status and processing requirements. The mounting frame 63 fixes the electronic switch valve 62 and the bottom guide water pipe 61 to ensure their stable installation outside the filter tank 1 to prevent the equipment from being displaced or damaged due to vibration or other factors. The water vapor at the bottom is in direct contact with the exhaust gas, causing the liquid temperature to gradually increase, while the top is in contact with the external environment and the temperature is relatively low. Through the cooperation of the bottom guide water pipe 61 and the electronic switch valve 62, the temperature can be adjusted when the liquid refluxes, thereby optimizing the temperature distribution of the liquid and improving the processing efficiency and stability of the entire system.

[0046] Working principle:

[0047] like Figure 1 - Fig. 9 As shown:

[0048] In actual use, first, the exhaust gas enters the filter tank 1 through the air inlet pipe 31, and then diffuses evenly through the air outlet 33 at the bottom of the air induction column 32, which can drive the exhaust gas to contact with the return water net 34 for pre-wetting, thereby creating conditions for the subsequent desulfurization and denitrification reactions. During the pre-wetting process, the return water net 34 sprays the liquid evenly to make the particulate matter in the exhaust gas initially settle, while reducing the exhaust gas temperature and improving the contact effect between the exhaust gas and the desulfurization and denitrification agent. Then, the pre-wetted exhaust gas flows upward and contacts the desulfurization and denitrification agent sprayed by the spray component 2. The reverse contact of the sulfur denitrification agent liquid curtain can drive the sulfur dioxide, nitrogen oxides and other pollutants in the exhaust gas to fully react with the desulfurization and denitrification agent, thereby achieving the initial removal of pollutants. The water pump 23 in the spraying component 2 pumps the bottom liquid to the output tank 24, and evenly distributes it to the water outlet head 26 and the guide pipe 27 through the liquid diversion pipe 25. Finally, a uniform liquid curtain is formed by the dispersion frame 28, and then recycled through the reflux column 21 to ensure the full utilization of the desulfurization and denitrification agent. In this process, the exhaust gas continues to rise and mixes with the gas mixture. The ozone in the exhaust gas is fully mixed, and the strong oxidizing property of ozone can be used to further oxidize pollutants such as nitrogen oxides in the exhaust gas, so that it is easier to be absorbed and treated by the desulfurization and denitrification agent. The ozone enters through the ozone tube 51 and is evenly distributed in the exhaust gas under the action of the gas distribution pipe 52 and the air guide pipe 53, thereby enhancing the oxidation effect. Subsequently, the exhaust gas that has undergone preliminary treatment reaches the diversion component 4, and is then guided by the diversion column 41, so that the exhaust gas can contact the liquid sprayed by the watering ring 42 again, and perform secondary desulfurization, denitrification and dust removal. The water ring 42 sprays the liquid in the water tank 45 onto the exhaust gas evenly under the action of the water pump 46, and the water guide frame 43 and the return water column 44 guide the sprayed liquid back to the water tank 45 to achieve the recycling of the liquid. Finally, the water control component 6 collects the liquid at the bottom of the reflux column 21 through the bottom guide water pipe 61, and the electronic switch valve 62 automatically adjusts the discharge or circulation of the liquid according to the liquid temperature to ensure the balance of the liquid temperature and avoid the failure of the agent caused by local overheating.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A super-low emission device for desulfurization, denitrification and dust removal of a heating chain boiler, comprising a filter tank (1), characterized in that: A gas mixing assembly (5) is fixedly connected to the interior of the filter tank (1); A spray assembly (2); the spray assembly (2) is placed at the bottom end of the filter tank (1), the spray assembly (2) comprises a reflux column (21) fixedly connected to the bottom end of the filter tank (1), the top end of the reflux column (21) is fixedly connected to an inner ring (22), the outer side of the reflux column (21) is fixedly connected to a water pump (23), the output end of the water pump (23) is fixedly connected to an output tank (24), the end of the output tank (24) away from the water pump (23) is fixedly connected to a liquid diversion pipe (25), the inner side of the liquid diversion pipe (25) is fixedly connected to a water outlet head (26), the end of the water outlet head (26) away from the liquid diversion pipe (25) is fixedly connected to a guide pipe (27), the bottom end of the guide pipe (27) is fixedly connected to a dispersion frame (28), and the outer side of the spray assembly (2) is fixedly connected to a water control assembly (6); A dispersion component (3); the dispersion component (3) is placed inside the filter tank (1), the dispersion component (3) comprises an air intake pipe (31) fixedly connected to the inside of the filter tank (1), one end of the air intake pipe (31) is fixedly connected to an air induction column (32), an air outlet hole (33) is provided at the bottom end of the air induction column (32), a water return network (34) is fixedly connected to the top end of the air induction column (32), a wind shield frame (35) is fixedly connected to the top end of the inner ring (22), an air outlet pipe (36) is fixedly connected to the top end of the wind shield frame (35), and a flow diversion component (4) is fixedly connected to the inside of the dispersion component (3).

2. The ultra-low emission device for desulfurization, denitrification and dust removal of a heating chain boiler according to claim 1 is characterized in that: The outer side of the liquid diversion pipe (25) is fixedly connected to a positioning frame (29), one end of the positioning frame (29) away from the liquid diversion pipe (25) is fixedly connected to the filter tank (1), and the outer side of the dispersion frame (28) is fixedly connected to the air outlet pipe (36).

3. The ultra-low emission device for desulfurization, denitrification and dust removal of a heating chain boiler according to claim 1 is characterized in that: The water return net (34) and the wind shield frame (35) are symmetrically designed and are both conical in shape. The bottom end of the air induction column (32) is fixedly connected to the inner ring (22). The outer side of the air outlet pipe (36) passes through the filter tank (1) and extends outward. The outer side of the water return net (34) is fixedly connected to the inner wall of the inner ring (22).

4. The ultra-low emission device for desulfurization, denitrification and dust removal of a heating chain boiler according to claim 3 is characterized in that: The diversion assembly (4) comprises a diversion column (41) fixedly connected to the inside of the air outlet pipe (36), a water sprinkler ring (42) fixedly connected to the inside of the diversion column (41), a water guide frame (43) fixedly connected to the top of the diversion column (41), and a return water column (44) fixedly connected to the inside of the water guide frame (43).

5. The ultra-low emission device for desulfurization, denitrification and dust removal of a heating chain boiler according to claim 4 is characterized in that: The top of the filter tank (1) is fixedly connected to a water tank (45), the top of the filter tank (1) is fixedly connected to a second water pump (46), the output end of the second water pump (46) is fixedly connected to a water sprinkler ring (42), the input end of the second water pump (46) is fixedly connected to the water tank (45), and the bottom end of the return water column (44) is fixedly connected to the top of the water tank (45).

6. The ultra-low emission device for desulfurization, denitrification and dust removal of a heating chain boiler according to claim 1 is characterized in that: The gas mixing assembly (5) comprises an ozone tube (51) fixedly connected to the inside of the filter tank (1); one end of the ozone tube (51) is fixedly connected to a gas distribution pipe (52); the outer bottom end of the gas distribution pipe (52) is fixedly connected to an air guide pipe (53); and the outer side of the air guide pipe (53) is fixedly connected to the inside of the windshield frame (35).

7. The ultra-low emission device for desulfurization, denitrification and dust removal of a heating chain boiler according to claim 1 is characterized in that: The water control assembly (6) comprises a bottom flow guide pipe (61) fixedly connected to the outside of the reflux column (21); an electronic switch valve (62) is fixedly connected to the outside of the bottom flow guide pipe (61); a mounting frame (63) is fixedly connected to the outside of the electronic switch valve (62); and the mounting frame (63) is fixedly connected to the outside of the filter tank (1).

8. The ultra-low emission device for desulfurization, denitrification and dust removal of a heating chain boiler according to claim 1 is characterized in that: The bottom end of the reflux column (21) is fixedly connected to a receiving frame (7), a switch door plate (8) is installed on the outside of the filter tank (1), and the outside of the water pump (23) is installed on the top of the receiving frame (7).

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