Waste gas treatment tower with dust removal and combustion functions

Abstract

A waste gas treatment tower with dust removal and combustion functions belongs to the technical field of combustor equipment and comprises a combustion tower body, a high-temperature fan, an air blower, a liquid level switch and a dust removal mechanism. The dust removal mechanism comprises a water tank, electromagnetic valves, a high-temperature fan, an air blower and a liquid level switch, the dust removal mechanism and the combustion tower body are installed together, one side of the upper end of the water tank and one side of the lower side of the water tank are connected with one ends of the two electromagnetic valves respectively, the other end of one electromagnetic valve is connected with a tap water pipe, and the other end of the other electromagnetic valve is connected with the liquid inlet end of the wastewater pool; an exhaust pipe of the high-temperature fan is fixedly provided with a breather pipe, and the other end of the breather pipe is located in the water tank; an air pipe is fixedly mounted at the outer side end of the tower body above the breather pipe; and the other side of the air pipe is fixedly connected with an exhaust pipe of an air blower through valve series connection. According to the utility model, the amount of dust in discharged waste gas after combustion is reduced, and the environment can be well protected; when the water tank lacks water, water can be automatically added, and when the water is too dirty, the water can be conveniently replaced.

Description

Technical Field

[0001] This utility model relates to the technical field of waste gas treatment equipment, and in particular to a waste gas treatment tower with dust removal and combustion functions. Background Technology

[0002] Currently, methods for controlling NOx (nitrogen oxides) emissions from the combustion of environmentally harmful solid waste and related fuels (such as coal, biomass, or waste) mainly include SNCR (Selective Non-Catalytic Reduction), SCR (Selective Catalytic Reduction), and low-NOx combustion. These methods primarily involve reducing NOx emissions from the combustion of fuels with high nitrogen content (such as coal, biomass, or waste), where nitrogen is converted into fuel-type NOx (e.g., 20%-80% of the nitrogen in coal-fired boilers is converted to NOx, especially when volatile matter in coal undergoes rapid pyrolysis, significantly increasing NOx formation). SNCR and SCR methods, however, involve reducing NOx generated after combustion. These methods are influenced by numerous factors, involve complex processes, and have high investment and operating costs, thus limiting their application. Low-NOx combustion, on the other hand, involves mixing combustion air into the flue gas to lower the temperature of the flame core, significantly reducing the formation of thermal NOx. This can reduce NOx emissions from 150 mg / m³ to below 15 mg / m³, reducing direct atmospheric pollution.

[0003] Although existing equipment for reducing nitrogen oxide emissions in flue gas (hereinafter referred to as combustion towers) reduces NOx pollution by burning the flue gas emitted from the previous production process, it still has the following technical shortcomings that urgently need improvement due to structural limitations. Specifically, existing combustion towers directly input the flue gas emitted from the previous process into the tower for combustion (the combustion tower is equipped with a burner, which ignites the input natural gas through an electronic igniter during operation. After the natural gas is ignited, the igniter loses power and stops working under the action of the thermocouple probes and other components of the electronic burner, thus the natural gas assists in the combustion of the waste gas), and then discharges the waste gas after combustion. In other words, the dust in the waste gas before entering the burner is not treated. Thus, the dust will be discharged into the atmosphere with the waste gas after combustion, which will more or less have an adverse impact on the environment. In summary, it is very necessary to provide a waste gas treatment tower that can reduce NOx and dust emissions. Summary of the Invention

[0004] To overcome the shortcomings of existing combustion towers, which are limited by their structure and cannot effectively reduce dust in the exhaust gas after combustion, thus having an adverse impact on the atmospheric environment, this utility model provides a waste gas treatment tower with dust removal and combustion functions. This tower is based on the combustion tower body and can remove dust from the input waste gas before combustion during operation. It can effectively reduce the NOx content in the exhaust gas and also reduce the amount of dust in the exhaust gas after combustion, thus playing a better role in protecting the environment.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A waste gas treatment tower with dust removal and combustion functions includes a combustion tower body, a high-temperature fan, a blower, a level switch, and a dust removal mechanism. A support plate is fixedly installed at one end of the outer side of the tower body, and the high-temperature fan is fixedly installed on the support plate. The inlet pipe of the high-temperature fan is fixedly connected to the waste gas discharge pipe of the previous production process. The dust removal mechanism includes a water tank and a solenoid valve. A fixed plate is fixedly installed inside the tower body, and the lower end of the water tank is fixedly installed on the fixed plate. The upper end of the water tank has an open structure, and connecting pipes are fixedly installed on one side of the upper end and one side of the lower end of the water tank, respectively. The side is fixedly connected to one end of each of the two solenoid valves. One solenoid valve is fixedly connected to the water supply pipe at the other end, and the other solenoid valve is fixedly connected to the inlet of the wastewater tank at the other end. A vent pipe is fixedly installed on the exhaust pipe of the high-temperature blower, and the other end of the vent pipe is located inside the water tank. An air pipe is fixedly installed on the outer end of the tower body above the vent pipe. The other end of the air pipe is fixedly connected to the exhaust pipe of the blower via a valve in series. The liquid level switch is fixedly installed at the lower end inside the water tank. The power output terminal of the liquid level switch is electrically connected to the power input terminal of one of the solenoid valves.

[0007] Furthermore, the distance between the outer side of the water tank and the inner side of the tower body.

[0008] Furthermore, the water tank is filled with water, and the lower end of the other side of the vent pipe is located at the lower end of the water tank.

[0009] Furthermore, the solenoid valve is a normally closed valve core solenoid valve.

[0010] Furthermore, the level switch is a float-type level switch, and the level switch is spaced apart from the bottom of the water tank.

[0011] Furthermore, a transparent observation panel is installed on the tower body at the front of the water tank.

[0012] Furthermore, the surface of the fixing plate has several dust leakage holes at the outer end of the water tank.

[0013] Furthermore, the upper end of the tower body is connected to the exhaust pipe of the production area via a pipeline, and a dust discharge valve is installed at the lower end of the tower body.

[0014] Furthermore, an exhaust hood is fixedly installed at the lower end of the vent pipe, and the lower end of the exhaust hood has multiple air distribution holes.

[0015] The beneficial effects of this utility model are: (1) Based on the combustion tower body, this utility model has the function of burning exhaust gas and reducing NOx content in the exhaust gas of ordinary combustion towers; in particular, the exhaust gas of this utility model will adsorb dust by water before combustion, and a suitable amount of air will be blown into the tower body by a blower to improve the combustion effect of exhaust gas, thereby further reducing the amount of dust in the exhaust gas after combustion, which can play a better role in protecting the environment; (2) After the production of this utility model is completed, the staff can open the manual valve to discharge a very small amount of dust that falls into the lower part of the tower body after combustion; when the water tank is short of water, it can be automatically added, and when the water adsorbs dust too dirty, it can also be convenient to open the two solenoid valves to change the water, ensuring the dust adsorption effect. In summary, this utility model has good application prospects. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a partial structural schematic diagram of the present invention.

[0019] Figure 3 This is the circuit diagram of this utility model. Detailed Implementation

[0020] Figure 1 , 2 As shown in Figure 3, the exhaust gas treatment tower with dust removal and combustion functions includes a combustion tower body 1, a power supply module A1, a high-temperature fan M1, and a blower M2. Figure 1(Not shown in the diagram) Power switches S1, S2, and S3, liquid level switch T, burner 101 and igniter 102 of the combustion tower body are respectively fixedly installed inside the upper part of the tower body 103 of the burner body. The air inlet of burner 101 is connected in series with a manual valve 21 and a natural gas pipe through a pipeline. It also has a dust removal mechanism. A support plate 104 is fixedly installed on the right side of the tower body. High-temperature fan M1 is fixedly installed on the support plate 104. The air inlet pipe of high-temperature fan M1 is connected to the exhaust pipe of the previous production process through a pipeline. The dust removal mechanism includes a water tank 31, solenoid valves DC1 and DC2. A fixing plate 105 is fixedly installed in the middle of the tower body. The lower end of water tank 31 is fixedly installed on the fixing plate 105. The upper part of the water tank 31 has an open structure. A connecting pipe 311, communicating with the interior, is fixedly installed on the lower right and left sides of the upper part of the water tank 31. The outer sides of the two connecting pipes 311 are respectively threaded to one end of the two solenoid valve batteries DC1 and DC2 (the middle parts of the two connecting pipes extend outwards from the tower body through an opening on the left side and one opening on the right side, respectively; the openings and the outer sides of the connecting pipes are sealed). The other end of the right solenoid valve DC1 is connected to a tap water pipe via a pipeline, and the other end of the left solenoid valve DC2 is connected to the inlet of the wastewater tank via a pipeline. A vent pipe 4 is fixedly installed on the exhaust pipe of the high-temperature fan M1, and the vent pipe 4 enters the water tank 31 through another opening on the right side of the tower body. The ventilation pipe 4 is introduced into the tower body through another opening on the right side of the tower body, and the opening and the outside of the ventilation pipe 4 are sealed with sealant. An air pipe 5, which is connected to the inside of the tower body, is fixedly installed on the right side of the outer end of the tower body above the ventilation pipe. The right side of the air pipe 5 is connected to the exhaust pipe of the blower M2 via another manual valve 22. The liquid level switch T is fixedly installed in the lower left part of the water tank 31 (the wire connected to the liquid level switch is led out through an opening on the left side of the tower body, and the opening is sealed with sealant). The power switch, power module A1, and electronic igniter control circuit are installed on the circuit board inside the component box 5. The component box 5 is installed in the middle of the lower front outer part of the tower body 103. The power supply of the power module A1 is... Input pins 1 and 2 are connected to the two poles of the 220V AC power supply via wires. The power output pins 3 and 4 of power module A1 are connected to the power input pins of two power switches S2 and S3 and the level switch T via wires. The positive power output pins of the two power switches S2 and S3, the negative power output pin 4 of power module A1, and the power input pins of the two solenoid valves DC1 and DC2 are connected via wires. The power output pin of level switch T, the negative power output pin 4 of power module A1, and the positive power input pin of the right solenoid valve DC1 are connected via wires. The power input pins of the high-temperature fan M1 and the blower M2 are connected in series with the third power switch S1 and to the 380V AC power supply via wires.

[0021] Figure 1 , 2As shown in Figure 3, the distance between the outer side of the water tank 31 and the inner side of the tower body 103 is [not specified]. The water tank 31 is filled with four-fifths of water. The lower left end of the vent pipe 4 is located in the middle of the lower end of the water tank 31 (the lower end of the vent pipe is 1 cm away from the bottom of the water tank). The solenoid valves DC1 and DC2 are normally closed solenoid valves. The level switch T is a float-type level switch, and the level switch T is 15 cm away from the bottom of the water tank 31. The tower body 103 has an observation hole in the middle of the front of the water tank, and a high-temperature tempered glass plate 6 is fixedly installed in front of the observation hole. The surface of the fixed plate 105 has several dust leakage holes 1051 distributed in a ring on the outer side of the water tank. The upper end of the tower body 103 is connected to the exhaust pipe of the production area via a pipe, and a manual dust discharge valve 106 is installed at the lower end of the tower body. A hollow exhaust hood 41 that communicates with the interior of the vent pipe 4 is fixedly installed at the lower end. The lower end of the exhaust hood has multiple air distribution holes 411 (which facilitates the dispersion of exhaust gas in the water tank and effectively absorbs dust).

[0022] Figure 1 , 2 As shown in Figure 3, this novel invention, based on the combustion tower body 1, has the function of burning exhaust gas in a conventional combustion tower and reducing the NOx content in the emitted exhaust gas. Specifically, the flue gas emitted from the previous process is fed into the tower body 103 for combustion (the combustion tower body 1 is equipped with a burner 101; after opening valve 21, natural gas enters the burner 101 and is ignited by an electronic igniter 102. After ignition, the igniter 102 is de-energized and stops working under the action of the thermocouple probe and other components of the electronic burner 102, thus the natural gas assists in the combustion of the exhaust gas). The combusted exhaust gas is then discharged. By adjusting the opening and closing size of valve 21, the amount of natural gas entering the combustion tower body 1 can be adjusted, ensuring effective combustion of the exhaust gas while saving natural gas as much as possible. It should be noted that the above are existing mature technologies, and this application does not protect the above technical points in any way, nor does it elaborate on their working principles. The main technical points protected by this application are as follows (protection of dust in the exhaust gas by water adsorption treatment, automatic water filling of the water tank, and technical solutions to further improve combustion efficiency).

[0023] Figure 1 , 2As shown in Figure 3, in this application, when working, the power switch S1 is turned on first (at this moment the burner is already in the state of natural gas combustion). Then, the high temperature fan M1 and the blower M2 are powered on and start working. The blower M2 provides air for the exhaust gas and natural gas burning in the tower body, which improves the combustion efficiency (the opening and closing degree of the valve core of the regulating valve 22 can be adjusted to adjust the appropriate amount of air input to the burner, that is, the combustion effect of natural gas and exhaust gas is better, preventing incomplete combustion between natural gas and exhaust gas, and the exhaust gas containing relatively more nitrogen oxides). After the high-temperature fan M1 is powered on, its air inlet generates negative pressure. The exhaust gas from the previous process enters the lower end of the water tank 31 through the ventilation pipe 4. Then, the gas in the exhaust gas is separated from the water and enters the burner 101, which is already burning (the hollow annular structure of the burner 101 will not obstruct the upward movement of the exhaust gas). Thus, the exhaust gas is assisted by natural gas for combustion and is discharged from the upper end of the tower. Since water has the adsorption capacity for dust, all the dust in the exhaust gas can be effectively adsorbed, and almost no dust enters the burner. Therefore, the amount of dust in the exhaust gas after combustion is reduced, which can play a better role in protecting the environment. After combustion is complete, all power switches are turned off. At regular intervals, staff can open the dust discharge valve 106 at the bottom of the tower to discharge the very small amount of dust that falls into the bottom of the tower 103 after combustion. (In extreme cases, even dust-free exhaust gas may produce a small amount of dust after combustion. The dust that falls outside the water tank will leak into the bottom of the tower through the leakage hole. Although a small amount of dust is discharged with the exhaust gas after combustion, the amount is small and the combustion is complete. Compared with existing combustion towers, the amount of dust is greatly reduced and the harmful substances in the dust are burned off, so the impact on the environment is negligible.)

[0024] Figure 1 , 2 As shown in Figure 3, when the water level in the tank is higher than the minimum threshold (water depth is higher than 15 cm), the internal contacts of the level switch T will not close. In this way, the solenoid valve DC1 will not be energized and the valve core will close, and water will not enter the water tank 31. When the water level in the tank is lower than the minimum threshold (water depth is lower than 15 cm), the internal contacts of the level switch T will close. In this way, the solenoid valve DC1 will be energized and the valve core will open, and tap water will enter the water tank 31. Through the above, this application can always ensure that the water level in the tank will not be lower than 15 cm, which meets the need for dust adsorption. After a period of time, when the staff observes through the observation board 7 that the water in the water tank 31 is too dirty due to the adsorption of dust, the staff turns on the two power switches S2 and S3. This energizes the solenoid valves DC1 and DC2, opening the valve cores. Tap water enters from the upper right end of the water tank, and the dirty water in the water tank is discharged from the lower left end, thus replacing the dirty water. When the water quality improves, the power switches S2 and S3 are turned off, de-energizing the solenoid valves DC1 and DC2, closing the valve cores. The water in the tank can then resume the normal process of adsorbing dust from the exhaust gas. Figure 3In the diagram, power module A1 is a finished product of AC 220V power to DC 12V power conversion module; solenoid valves DC1 and DC2 are normally closed valve core solenoid valves with a power of 550W; blower M2 has a power of 500W; high-temperature fan M1 is a finished product of high-temperature resistant suction fan with model YN5-47 and a power of 750W; and level switch T is a finished product of normally closed contact float-type water level switch.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A waste gas treatment tower with dust removal and combustion functions, comprising a combustion tower body, a high-temperature fan, a blower, and a liquid level switch, characterized in that, It also features a dust removal mechanism; a support plate is fixedly installed at one end of the outer side of the tower body, and a high-temperature fan is fixedly installed on the support plate. The air inlet pipe of the high-temperature fan is fixedly connected to the exhaust pipe of the previous production process. The dust removal mechanism includes a water tank and solenoid valves. A fixed plate is fixedly installed inside the tower body, and the lower end of the water tank is fixedly installed on the fixed plate. The upper end of the water tank has an open structure. Connecting pipes are fixedly installed on one side of the upper end and one side of the lower end of the water tank, respectively. The outer sides of the two connecting pipes are fixedly connected to one end of two solenoid valves, one solenoid valve's other end is fixedly connected to a tap water pipe, and the other solenoid valve's other end is fixedly connected to the liquid inlet of the wastewater tank. A vent pipe is fixedly installed on the exhaust pipe of the high-temperature fan, and the other end of the vent pipe is located inside the water tank. An air pipe is fixedly installed on the outer side of the tower body above the vent pipe, and the other end of the air pipe is fixedly connected to the exhaust pipe of the blower via a valve in series. A liquid level switch is fixedly installed at the lower end of the water tank. The power output terminal of the liquid level switch is electrically connected to the power input terminal of one of the solenoid valves.

2. The waste gas treatment tower with dust removal and combustion functions according to claim 1, characterized in that, The distance between the outside of the water tank and the inside of the tower.

3. The waste gas treatment tower with dust removal and combustion functions according to claim 1, characterized in that, The water tank is filled with water, and the lower end of the other side of the vent pipe is located at the lower end of the water tank.

4. The waste gas treatment tower with dust removal and combustion functions according to claim 1, characterized in that, The solenoid valve is a normally closed solenoid valve with a spool.

5. The waste gas treatment tower with dust removal and combustion functions according to claim 1, characterized in that, The level switch is a float-type water level switch, and the distance between the level switch and the bottom of the water tank is [not specified].

6. The waste gas treatment tower with dust removal and combustion functions according to claim 1, characterized in that, A transparent observation panel is installed on the front of the tower body at the water tank.

7. The waste gas treatment tower with dust removal and combustion functions according to claim 1, characterized in that, The surface of the fixing plate has several dust leakage holes on the outer end of the water tank.

8. The waste gas treatment tower with dust removal and combustion functions according to claim 1, characterized in that, The upper part of the tower is connected to the exhaust pipe of the production area via a pipeline, and a dust discharge valve is installed at the lower part of the tower.

9. The waste gas treatment tower with dust removal and combustion functions according to claim 1, characterized in that, An exhaust hood is fixedly installed at the lower end of the vent pipe, and the lower end of the exhaust hood has multiple air distribution holes.

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