Integrated wet-process electrostatic dust collection and desulfurization device
By designing an integrated wet electrostatic dust removal and desulfurization device and using the water circulation system for wastewater recycling, the problems of large water consumption and low wastewater utilization rate of wet electrostatic dust removal and desulfurization devices in industrial boilers are solved, and efficient dust removal and desulfurization are achieved, reducing dust removal costs.
Patent Information
- Application Number
- CN202420587646.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-25
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-25
Smart Images
Figure CN222586107U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air pollution control, and in particular to an integrated wet electrostatic dust removal and desulfurization device. Background Art
[0002] The desulfurization of industrial boilers is divided into two methods: dry desulfurization and wet desulfurization. Dry desulfurization generally uses lime (limestone) as a desulfurizer, and there are methods such as furnace calcium injection. The utilization rate of the desulfurizer is low, and the desulfurization efficiency is low, which does not meet the national limit standards for boiler flue gas emissions; wet desulfurization includes limestone method, double alkali method, magnesium oxide method, sodium alkali method or ammonia method, etc. The limestone method is not commonly used in general industrial boilers due to its complex system, high pollution during operation, and easy to cause system blockage and other problems; other desulfurization methods have strong alkalinity of the absorbent, fast reaction speed with SO2, high absorption rate, high utilization rate of the desulfurizer, and generally the desulfurization efficiency can reach more than 90%, but there are also complex wastewater treatment, large initial investment, and high operating costs.
[0003] The commonly used dust removal methods in industrial boiler dust removal are also divided into dry and wet types. The most commonly used dry methods are electrostatic precipitators and bag dust collectors. These two methods have large equipment, high investment and operating costs, and low dust removal efficiency, and cannot meet the current national emission standards. Wet dust removal commonly uses water bath dust collectors, granite water film dust collectors, and wet electrostatic precipitators. The water bath and granite water film dust removal methods have high dust removal efficiency, but consume a lot of water and have high sewage treatment costs. The wet electrostatic precipitator is small in size. Due to the existence of electric field force, the dust removal efficiency is very high and can achieve a flue gas emission concentration of ≤5mg / Nm3. However, due to the use of water film, the water consumption is also high. It has been widely used in power station boilers.
[0004] Therefore, an integrated wet electrostatic dust removal and desulfurization device is proposed, aiming to solve the problems of high water consumption and low wastewater utilization rate in the prior art. Utility Model Content
[0005] In order to make up for the above deficiencies, the utility model provides an integrated wet electrostatic dust removal and desulfurization device.
[0006] The utility model is achieved in this way:
[0007] An integrated wet electrostatic dust removal and desulfurization device comprises a dust removal and desulfurization mechanism and a water circulation mechanism, wherein the dust removal and desulfurization mechanism comprises a desulfurization box and a dust removal box, a pair of support columns are installed between the desulfurization box and the dust removal box, a connecting pipe is connected between the top of the desulfurization box and the bottom of the dust removal box, a support frame is installed inside the dust removal box, a plurality of anode tubes are installed inside the support frame, a connecting frame is installed inside the dust removal box above the support frame, a plurality of cathode rods are installed at the bottom of the connecting frame, and the cathode rods are located inside the anode tubes, a plurality of air holes are opened on the top of the connecting frame, the water circulation mechanism comprises a sedimentation tank, and the sedimentation tank is installed at the bottom of the desulfurization box, a pump is installed outside the sedimentation tank, a conduit is connected between the input end of the pump and the sedimentation tank, a water pipe is connected to the output end of the sedimentation tank, and one end of the water pipe passes through the dust removal box and is connected to the sedimentation tank, the water pipe is located above the support frame, and a plurality of water outlet holes are opened on the part located above the support frame.
[0008] The beneficial effect of adopting the above further scheme is that when desulfurizing the exhaust gas, the limestone aqueous solution is poured into the desulfurization box, and the CaCO3 and the blown oxidizing wind therein react chemically with the SO2 in the exhaust gas to form gypsum, and the SO2 is removed, and the remaining wastewater flows into the sedimentation tank for precipitation. The desulfurized exhaust gas enters the dust removal box, where it is electrostatically precipitated, and the dust will adhere to the inner wall of the anode tube at this time. Because the conduit is located at the upper position of the sedimentation tank, the pump can extract the relatively clean water above after starting, and make it flow in the water pipe. When the water flows through the water outlet, it will flow out and form a water film on the inner wall of the anode tube, thereby taking away the dust, and then flowing into the sedimentation tank again, so as to achieve the desulfurization and dust removal of the exhaust gas while being able to recycle the wastewater generated in the process, thereby effectively reducing the dust removal cost of the enterprise.
[0009] Furthermore, a drainage block is installed at the bottom of the dust removal box, and the top of the drainage block is set as an inclined surface.
[0010] The beneficial effect of adopting the above further solution is that the drainage block can reduce the storage flow of wastewater in the dust removal box, ensuring that most of the wastewater flows into the sedimentation tank.
[0011] Furthermore, a cavity is opened on one side of the sedimentation tank, and a collecting frame slides in the cavity, and a handle is installed on one side of the collecting frame.
[0012] Furthermore, one side of the sedimentation tank is connected to a main pipe through a valve body, one side of the collection frame is provided with an opening, and the main pipe and the opening are in close contact with each other.
[0013] The beneficial effect of adopting the above further solution is that after the collecting frame is taken out, the fixed waste settled at the bottom thereof can be taken out, and before taking out the collecting frame, the valve body can be opened and the waste water in the collecting frame can be drained by the main pipe.
[0014] Furthermore, a liquid inlet pipe is installed on the inner wall of the desulfurization box, and a spray head is installed on the outer side of the liquid inlet pipe.
[0015] Furthermore, an air intake pipe is connected to the outer side of the desulfurization box.
[0016] The beneficial effect of adopting the above further scheme is that the exhaust gas flows into the desulfurization box through the air inlet pipe, while the limestone aqueous solution flows in through the liquid inlet pipe and is sprayed out through the spray head, thereby reacting with the exhaust gas.
[0017] Furthermore, a distribution box is provided outside the dust removal and desulfurization mechanism, and the distribution box supplies power to the pump and cathode rod.
[0018] The beneficial effect of the utility model is as follows: the utility model obtains an integrated wet electrostatic dust removal and desulfurization device through the above design. When desulfurizing the waste gas, the limestone aqueous solution is poured into the desulfurization box, and the CaCO3 and the blown oxidizing wind therein react chemically with the SO2 in the waste gas to generate gypsum, and the SO2 is removed, and the remaining wastewater flows into the sedimentation tank for precipitation, and the desulfurized waste gas enters the dust removal box, which is electrostatically dusted, and the dust will adhere to the inner wall of the anode tube at this time. Because the conduit is located at the upper position of the sedimentation tank, the pump can extract the relatively clean water above and make it flow in the water pipe after starting. When the water flows through the water outlet, it will flow out and form a water film on the inner wall of the anode tube, thereby taking away the dust, and then flowing into the sedimentation tank again, so as to achieve the desulfurization and dust removal of the waste gas while being able to recycle the wastewater generated in the process, thereby effectively reducing the dust removal cost of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the following is a brief introduction to the drawings required for use in the implementation mode. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 A schematic diagram of the three-dimensional structure of an integrated wet electrostatic dust removal and desulfurization device provided by the utility model;
[0021] Figure 2 for Figure 1 A schematic diagram of the structure of structure A in the middle;
[0022] Figure 3 for Figure 1 A schematic diagram of the structure of structure B in the middle;
[0023] Figure 4 A system block diagram of wastewater recycling for an integrated wet electrostatic dust removal and desulfurization device provided by the utility model.
[0024] In the figure: 100, dust removal and desulfurization mechanism; 1001, desulfurization box; 1002, air inlet pipe; 1003, liquid inlet pipe; 1004, spray head; 1005, support column; 1006, connecting pipe; 1007, dust removal box; 1008, support frame; 1009, connecting frame; 1010, anode tube; 1011, cathode rod; 1012, air hole; 200, water circulation mechanism; 2001, sedimentation tank; 2002, main pipe; 2003, collecting frame; 2004, handle; 2005, pump; 2006, conduit; 2007, water pipe; 2008, drainage block. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.
[0027] Embodiment 1 of the utility model of an integrated wet electrostatic dust removal and desulfurization device
[0028] The utility model provides the following technical solutions: Figure 1-Figure 4, including a dust removal and desulfurization mechanism 100 and a water circulation mechanism 200, the dust removal and desulfurization mechanism 100 includes a desulfurization box 1001 and a dust removal box 1007, a pair of support columns 1005 are installed between the desulfurization box 1001 and the dust removal box 1007, a connecting pipe 1006 is connected between the top of the desulfurization box 1001 and the bottom of the dust removal box 1007, a support frame 1008 is installed inside the dust removal box 1007, a plurality of anode tubes 1010 are installed inside the support frame 1008, and a connecting pipe 1006 is installed above the support frame 1008 inside the dust removal box 1007. The connecting frame 1009 is provided with a plurality of cathode rods 1011 at the bottom of the connecting frame 1009, and the cathode rods 1011 are located inside the anode tube 1010. The top of the connecting frame 1009 is provided with a plurality of air holes 1012. The water circulation mechanism 200 includes a sedimentation tank 2001, and the sedimentation tank 2001 is installed at the bottom of the desulfurization box 1001. A pump 2005 is installed outside the sedimentation tank 2001. A conduit 2006 is connected between the input end of the pump 2005 and the sedimentation tank 2001. The output end of the sedimentation tank 2001 is connected to a water pipe 2006. 007, and one end of the water pipe 2007 passes through the dust removal box 1007 and is connected to the sedimentation tank 2001. The water pipe 2007 is located above the support frame 1008, and the part located above the support frame 1008 is provided with a plurality of water outlets. When desulfurizing the waste gas, the limestone aqueous solution is poured into the desulfurization box 1001, and the CaCO3 therein, the blown oxidizing wind and the SO2 in the waste gas react chemically to form gypsum CaSO4·2H2O, and the SO2 is removed. The remaining waste water flows into the sedimentation tank 2001 for precipitation, and the waste gas after desulfurization enters the dust removal box 1007. It is electrostatically precipitated, and the dust will adhere to the inner wall of the anode tube 1010 at this time. Because the conduit 2006 is located at the upper part of the sedimentation tank 2001, the pump 2005 can extract the relatively clean water from the top after starting, and make it flow in the water pipe 2007. When the water flows through the water outlet, it will flow out and form a water film on the inner wall of the anode tube 1010, thereby taking away the dust, and then flowing into the sedimentation tank again, so as to achieve the desulfurization and dust removal of the exhaust gas while being able to recycle the wastewater generated in the process, thereby effectively reducing the dust removal cost of the enterprise.
[0029] Embodiment 2 of the utility model of an integrated wet electrostatic dust removal and desulfurization device
[0030] Reference Figure 1-Figure 4Specifically, a cavity is provided on one side of the sedimentation tank 2001, and a collecting frame 2003 slides in the cavity, a handle 2004 is installed on one side of the collecting frame 2003, one side of the sedimentation tank 2001 is connected to a main pipe 2002 through a valve body, an opening is provided on one side of the collecting frame 2003, and the main pipe 2002 fits the opening, after the collecting frame 2003 is taken out, the fixed waste deposited at the bottom thereof can be taken out, and before taking out the collecting frame 2003, the valve body can be opened and the main pipe 2002 can be used to drain the wastewater in the collecting frame 2003.
[0031] Embodiment 3 of the utility model of an integrated wet electrostatic dust removal and desulfurization device
[0032] Reference Figure 1-Figure 4 Specifically, the inner wall of the desulfurization box 1001 is installed with a liquid inlet pipe 1003, and the outer side of the liquid inlet pipe 1003 is installed with a spray head 1004. The outer side of the desulfurization box 1001 is connected with an air inlet pipe 1002, and the exhaust gas 1002 flows into the desulfurization box 1001 through the air inlet pipe 1002, and the limestone aqueous solution flows in through the liquid inlet pipe 1003 and is sprayed out through the spray head 1004, thereby reacting with the exhaust gas 1002 to complete the desulfurization. The outer side of the dust removal and desulfurization mechanism 100 is provided with a distribution box, and the distribution box supplies power to the pump 2005 and the cathode rod 1011. After power is supplied, a direct current high voltage will be formed between the anode tube 1010 and the cathode rod 1011. Under the action of the strong electric field, a corona layer is generated around the cathode rod 1011, and the air in the corona layer is ionized in an avalanche manner, thereby generating a large number of negative ions and a small number of positive ions. The dust and mist particles entering the device with the exhaust gas collide with these positive and negative ions and become charged. The charged dust and mist particles move toward the anode tube 1010 due to the Coulomb force of the high-voltage electrostatic field; after reaching the anode tube 1010, the charge they carry is released, and the dust and mist particles are collected by the anode tube 1010, thereby completing the dust removal.
[0033] Specifically, the working principle of the integrated wet electrostatic dust removal and desulfurization device is as follows: when in use, the exhaust gas 1002 flows into the desulfurization box 1001 from the air inlet pipe 1002, and the limestone aqueous solution flows in from the liquid inlet pipe 1003 and is sprayed out through the spray head 1004. The CaCO3 in it, the blown oxidizing wind and the SO2 in the exhaust gas react chemically to form gypsum CaSO4·2H2O, and the SO2 is removed. The remaining wastewater flows into the sedimentation tank 2001 for precipitation. The exhaust gas after desulfurization enters the dust removal box 1007. After the cathode rod 1011 is powered, a DC high voltage will be formed between the anode tube 1010 and the cathode rod 1011. Under the action of the strong electric field, a corona layer is generated around the cathode rod 1011, and the air in the corona layer undergoes an avalanche. The dust and mist particles enter the device with the exhaust gas and collide with these positive and negative ions to be charged. The charged dust and mist particles move toward the anode tube 1010 due to the Coulomb force of the high-voltage electrostatic field. After reaching the anode tube 1010, the charge they carry is released, and the dust and mist particles are collected by the anode tube 1010, thereby completing the dust removal. The wastewater generated in this process flows into the sedimentation tank 2001 for sedimentation. After the pump 2005 is started, it can extract the relatively clean water above and make it flow in the water pipe 2007. When the water flows through the water outlet, it will flow out and form a water film on the inner wall of the anode tube 1010, thereby taking away the dust, and then flowing into the sedimentation tank again.
[0034] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. An integrated wet electrostatic dust removal and desulfurization device, characterized in that: The invention comprises a dust removal and desulfurization mechanism (100) and a water circulation mechanism (200), wherein the dust removal and desulfurization mechanism (100) comprises a desulfurization box (1001) and a dust removal box (1007), wherein a pair of support columns (1005) are installed between the desulfurization box (1001) and the dust removal box (1007), wherein a connecting pipe (1006) is connected between the top of the desulfurization box (1001) and the bottom of the dust removal box (1007), wherein a support frame (1008) is installed inside the dust removal box (1007), wherein a plurality of anode tubes (1010) are installed inside the support frame (1008), wherein a connecting frame (1009) is installed inside the dust removal box (1007) above the supporting frame (1008), wherein a plurality of cathode rods (1011) are installed at the bottom of the connecting frame (1009), and wherein the cathode rods (1011) are connected to the cathode rods (1011). ) is located inside the anode tube (1010), a plurality of air holes (1012) are provided on the top of the connecting frame (1009), the water circulation mechanism (200) comprises a sedimentation tank (2001), and the sedimentation tank (2001) is installed at the bottom of the desulfurization box (1001), a pump (2005) is installed on the outside of the sedimentation tank (2001), a conduit (2006) is connected between the input end of the pump (2005) and the sedimentation tank (2001), a water pipe (2007) is connected to the output end of the sedimentation tank (2001), and one end of the water pipe (2007) passes through the dust removal box (1007) and is connected to the sedimentation tank (2001), the water pipe (2007) is located above the support frame (1008), and a plurality of water outlet holes are provided on the part located above the support frame (1008).
2. The integrated wet electrostatic dust removal and desulfurization device according to claim 1 is characterized in that: A drainage block (2008) is installed at the bottom of the dust removal box (1007), and the top of the drainage block (2008) is set as an inclined surface.
3. The integrated wet electrostatic dust removal and desulfurization device according to claim 1 is characterized in that: A cavity is provided on one side of the sedimentation tank (2001), and a collection frame (2003) slides in the cavity. A handle (2004) is installed on one side of the collection frame (2003).
4. The integrated wet electrostatic dust removal and desulfurization device according to claim 3 is characterized in that: One side of the sedimentation tank (2001) is connected to a main pipe (2002) via a valve body, one side of the collection frame (2003) is provided with an opening, and the main pipe (2002) fits the opening.
5. The integrated wet electrostatic dust removal and desulfurization device according to claim 1 is characterized in that: The inner wall of the desulfurization box (1001) is installed with a liquid inlet pipe (1003), and the outer side of the liquid inlet pipe (1003) is installed with a spray head (1004).
6. The integrated wet electrostatic dust removal and desulfurization device according to claim 5 is characterized in that: The outer side of the desulfurization box (1001) is connected to an air intake pipe (1002).
7. The integrated wet electrostatic dust removal and desulfurization device according to claim 1 is characterized in that: A distribution box is provided outside the dust removal and desulfurization mechanism (100), and the distribution box supplies power to the pump (2005) and the cathode rod (1011).