Bubbling turbulence absorption wet electric purification complete device for high-concentration nitrogen oxide waste gas

Abstract

The utility model relates to the technical field of waste gas treatment, in particular to a high-concentration nitrogen oxide waste gas bubbling turbulence absorption wet electric purification complete device which comprises a first-stage gas mixing bubbling tank and a gas inlet pipe, the gas inlet pipe is connected with the first-stage gas mixing bubbling tank, waste gas can be guided into the first-stage gas mixing bubbling tank through the gas inlet pipe, and the first-stage gas mixing bubbling tank is connected with the second-stage gas mixing bubbling tank through the gas inlet pipe. The gas outlet end of the first-stage gas mixing bubbling tank is connected with a first pipeline, and the gas outlet end of the first pipeline is connected with a second-stage gas mixing bubbling tank. According to the bubbling turbulence absorption wet electric purification complete device for the high-concentration nitrogen oxide waste gas, the gas-liquid mixing impact type bubble breaking mixer arranged in the bubbling tank has the advantages of efficient absorption and uniform and sufficient gas-liquid mixing, and the waste gas absorption efficiency and the gas conditioning and purification rate are improved; the specific purification efficiency is high through treatment of the two-stage gas-liquid mixing bubbling tank, different waste gas treatment requirements are met, the equipment stability is high, and secondary pollution cannot be generated.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to a complete set of bubbling turbulent absorption wet electric purification equipment for high-concentration nitrogen oxide waste gas. Background Art

[0002] A vacuum generator employs a Venturi tube to create a vacuum. This creates a pretreatment process with a highly efficient absorption turbulent layer by inducing intense gas-liquid mixing and collision between the gas and the absorption liquid in the gas-liquid mixer within the bubbling tank. Water at a predetermined pressure is then ejected through a jet stream, passing through the Venturi tube, creating a vacuum zone behind the tube. This vacuum draws in waste gas from the production process. This waste gas is then thoroughly mixed with high-pressure water containing liquid alkali through the Venturi tube, where it undergoes molecular diffusion exchange and neutralization. The waste gas is then sprayed from the outlet into a circulating water tank, where non-condensable gases are precipitated. The absorption liquid is then recycled through a centrifugal pump, completing the air intake purification process. The gas holes in the gas-liquid mixer within the bubbling tank have a uniform radius along the inlet direction, increasing flow resistance at the rear end of the gas, hindering the thorough mixing of the gas and liquid components. This results in low absorption efficiency and poor gas conditioning and purification rates.

[0003] The Venturi tube easily increases the temperature of the jet water during the vacuum generation process. The higher the water temperature, the higher the saturated vapor pressure, and the corresponding absolute pressure in the Venturi tube is also higher. In this way, the vacuum degree that the Venturi tube can draw is also lower, resulting in a decrease in the vacuum degree generated and instability, which is prone to secondary pollution. Therefore, a high-concentration nitrogen oxide waste gas bubbling turbulent absorption wet electric purification device is needed to solve the above problems. Utility Model Content

[0004] The purpose of the embodiments of the present utility model is to provide a complete set of bubbling turbulent absorption wet electric purification equipment for high-concentration nitrogen oxide waste gas, aiming to solve the problems mentioned in the background technology.

[0005] The embodiment of the utility model is implemented as follows: a high-concentration nitrogen oxide waste gas bubbling turbulence absorption wet electric purification complete set includes: a first-level gas mixing bubbling tank and an air inlet pipe, the air inlet pipe is connected to the first-level gas mixing bubbling tank, the exhaust gas can be introduced into the first-level gas mixing bubbling tank by the air inlet pipe, the air outlet end of the first-level gas mixing bubbling tank is connected to a first pipeline, and the air outlet end of the first pipeline is connected to a second-level gas mixing bubbling tank; a second pipeline, one end of which is connected to the second-level gas mixing bubbling tank and the other end is connected to a vacuum buffer tank, the lower end of the vacuum buffer tank is connected to a circulating water tank, the circulating water tank is connected to a circulating pipe, and the circulating pipe is connected to a water ring vacuum pump; a third pipeline, one end of which is connected to the vacuum buffer tank and the other end is connected to the water ring vacuum pump, the water ring vacuum pump is connected to a fourth pipeline, the end of the fourth pipeline away from the water ring vacuum pump is connected to a turbulence tower, the upper end of the turbulence tower is connected to a wet electrostatic precipitator, and the upper end of the wet electrostatic precipitator is provided with an exhaust port for discharging qualified exhaust gas.

[0006] Preferably, the air inlet pipe and the lower side of the first pipeline are both provided with air outlet holes, and there are multiple air outlet holes that gradually increase in size from top to bottom.

[0007] Preferably, the turbulent tower includes: a tower body, which is connected to the fourth pipeline, a wet electrostatic precipitator is connected to the upper end of the tower body, a packing layer is provided in the tower body, a plurality of packing layers are provided, a demisting layer is provided on the upper side of the packing layer, and an observation window for observing the inside is installed on the tower body; a spray pump, which is installed and connected to the tower body, a spray pipe is connected to the spray pump, the spray pipe extends into the tower body and is installed with a nozzle.

[0008] The utility model provides a high-concentration nitrogen oxide waste gas bubbling turbulent absorption wet electric purification complete set of equipment, and the gas-liquid mixing impact bubble crushing mixer arranged in the bubbling tank has high absorption efficiency and uniform and sufficient gas-liquid mixing, thereby improving the waste gas absorption efficiency, gas conditioning and purification rate; the specific purification efficiency is high through the two-stage gas-liquid mixing bubbling tank treatment, and it can adapt to different waste gas treatment requirements, has high equipment stability, and will not produce secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of a complete set of equipment for bubbling turbulent absorption wet electric purification of high-concentration nitrogen oxide waste gas.

[0010] Figure 2 This is a schematic diagram of the gas outlet holes of the bubbling turbulent absorption wet electric purification device for high-concentration nitrogen oxide waste gas.

[0011] Figure 3 This is a schematic diagram of the turbulent tower of the bubbling turbulent absorption wet electric purification system for high-concentration nitrogen oxide waste gas.

[0012] In the accompanying drawings: 1-first-stage gas mixing and bubbling tank, 2-air inlet pipe, 3-first pipeline, 4-second-stage gas mixing and bubbling tank, 5-second pipeline, 6-vacuum buffer tank, 7-circulating water tank, 8-circulating pipe, 9-water ring vacuum pump, 10-third pipeline, 11-fourth pipeline, 12-turbulence tower, 13-wet electrostatic precipitator, 121-tower body, 122-packing layer, 123-demist layer, 124-observation window, 125-spray pump, 126-spray pipe, 127-nozzle. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the present invention.

[0014] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0015] See also Figure 1 The present invention provides a complete set of equipment for wet electrochemical purification of high-concentration nitrogen oxide waste gas by turbulent bubbling absorption, which includes:

[0016] A first-level gas mixing bubbling tank 1 and an air inlet pipe 2, the air inlet pipe 2 is connected to the first-level gas mixing bubbling tank 1, and the exhaust gas can be introduced into the first-level gas mixing bubbling tank 1 through the air inlet pipe 2, and the air outlet end of the first-level gas mixing bubbling tank 1 is connected to the first pipeline 3, and the air outlet end of the first pipeline 3 is connected to the second-level gas mixing bubbling tank 4; a second pipeline 5, one end of which is connected to the second-level gas mixing bubbling tank 4 and the other end is connected to a vacuum buffer tank 6, the lower end of the vacuum buffer tank 6 is connected to a circulating water tank 7, the circulating water tank 7 is connected to a circulating pipe 8, and the circulating pipe 8 is connected to a water ring vacuum pump 9; a third pipeline 10, one end of which is connected to the vacuum buffer tank 3, and the other end is connected to the water ring vacuum pump 9, the water ring vacuum pump 9 is connected to a fourth pipeline 11, the end of the fourth pipeline 11 away from the water ring vacuum pump 9 is connected to a turbulence tower 12, the upper end of the turbulence tower 12 is connected to a wet electrostatic precipitator 13, and the upper end of the wet electrostatic precipitator 13 is provided with an exhaust port for discharging qualified exhaust gas.

[0017] like Figure 2 As shown, as a preferred embodiment of the present invention, the air inlet pipe 2 and the lower side of the first pipeline 3 are both provided with air outlet holes, and there are multiple air outlet holes and they gradually increase in size from top to bottom.

[0018] Highly efficient gas-liquid mixing and impact-type bubble crushing mixers are installed inside the primary gas mixing and bubbling tank 1 and the secondary gas mixing and bubbling tank 4. The radius of the gas outlet holes increases gradually along the gas inlet direction. The dense small holes at the front provide high-speed jets, which help break up bubbles and mix them with the liquid phase through bubbling. The large holes at the rear provide liquid phase flow. By increasing the contact area between the gas and liquid, diffusion and turbulence are promoted, flow resistance is reduced, and the gas and liquid phase components are fully mixed. Violent gas-liquid mixing and collision between the gas and the absorption liquid form a turbulent layer with efficient absorption and mass transfer. This improves the exhaust gas absorption efficiency, gas conditioning, and purification rate.

[0019] Through the treatment of the primary gas mixing bubbling tank 1 and the secondary gas mixing bubbling tank 4, harmful substances in the exhaust gas can be more comprehensively removed, ensuring a more thorough purification effect. Through the absorption of the primary gas mixing bubbling tank 1 and the secondary gas mixing bubbling tank 4, it can better adapt to different types of exhaust gas treatment needs and provide higher purification efficiency. It can also be customized according to different needs, with stable performance, can simultaneously process multiple mixed gases, has high purification efficiency, and does not produce secondary pollution. It is widely used in multiple fields such as high-concentration exhaust gas and low air volume treatment.

[0020] The water ring vacuum pump 9 can achieve an ultimate vacuum of 2000-4000 Pa. It has long been valued for its ability to achieve a rough vacuum. Because gas compression in the water ring vacuum pump is isothermal, it can extract flammable and explosive gases, as well as gases containing dust and water. Consequently, its application is increasing. The pump body contains a suitable amount of water as the working fluid. When the impeller rotates clockwise as shown in the figure on the right, water is thrown around by the impeller. Due to centrifugal force, the water forms a closed circular ring of approximately constant thickness, determined by the shape of the pump chamber. The lower inner surface of the water ring is tangential to the impeller hub, while the upper inner surface of the water ring contacts the blade tips (in reality, the blades are inserted into the water ring to a certain depth). A crescent-shaped space is formed between the impeller hub and the water ring, which is divided by the impeller into a number of smaller chambers equal to the number of blades. If the impeller's lower angle of 0° is taken as the starting point, the volume of the small cavity increases from small to large during the first 180° of the impeller's rotation, and it communicates with the air intake port on the end face. At this time, gas is sucked in, and when the air intake ends, the small cavity is isolated from the air intake port. As the impeller continues to rotate, the small cavity decreases from large to small, compressing the gas. When the small cavity communicates with the exhaust port, the gas is discharged from the pump. The water ring vacuum pump 9 achieves suction, compression, and exhaust by changing the volume of the pump cavity, so it is a variable displacement vacuum pump. It can achieve a large exhaust volume, occupies a small area, and has uniform air intake, stable and reliable operation, simple operation, and convenient maintenance.

[0021] The primary function of the vacuum buffer tank 6 is to reduce pressure fluctuations in the system, ensuring smoother operation. This reduces uneven vacuum flow and vacuum levels, lowers inertial losses, and improves the pump's suction performance. It also reduces uneven flow in the intake line, preventing overproduction and accommodating process flow requirements.

[0022] The vacuum buffer tank 6 plays a vital role in the vacuum system. First, through its volumetric design, it can effectively buffer pressure fluctuations when the water ring vacuum pump 9 stops working. This avoids system instability caused by pressure fluctuations and ensures the smooth operation of the system. Secondly, the vacuum buffer tank 6 also plays a role in preventing backflow, protecting the system from the influence of reverse flow and maintaining the normal working state of the system. In addition, the vacuum buffer tank 6 further stabilizes the vacuum degree of the system through the function of gas-liquid separation, prevents liquid or solid matter from entering the water ring vacuum pump 9, protects the normal operation of the water ring vacuum pump 9 and extends its service life. In summary, the vacuum buffer tank 6 not only plays a role in buffering and stabilizing pressure in the vacuum system, but also ensures the stability and efficiency of the system through gas-liquid separation. It is an indispensable equipment to ensure the normal operation of the system.

[0023] Tens of thousands of volts of DC high voltage is applied between the anode and cathode wires of the wet precipitator 13. Under the influence of the strong electric field, a corona layer is generated around the corona wires. The air in the corona layer undergoes avalanche ionization, producing a large number of negative ions and a small number of positive ions. This process is called corona discharge. Dust (mist) particles entering the wet ESP with the flue gas collide with these positive and negative ions and become charged. The charged dust (mist) particles are then moved toward the anode due to the Coulomb force of the high-voltage electrostatic field. Upon reaching the anode, their charge is released and the dust (mist) particles are collected by the anode. The collected dust forms a water film, which flows upward by gravity or flushing to the lower liquid storage tank or absorption tower, where it is separated from the flue gas. Wet ESPs are primarily manufactured and designed using honeycomb conductive fiberglass tube bundles. The fiberglass material is acid and alkali resistant, and honeycomb tube wet ESPs have a larger dust collection area, resulting in a stronger dust removal capability.

[0024] like Figure 3 As shown, as a preferred embodiment of the present invention, the turbulent tower 12 includes: a tower body 121, which is connected to the fourth pipeline 11, a wet electrostatic eliminator 13 is connected to the upper end of the tower body 121, a packing layer 122 is provided in the tower body 121, a plurality of packing layers 122 are provided, a demisting layer 123 is provided on the upper side of the packing layer 122, and an observation window 124 for observing the inside is installed on the tower body 121; a spray pump 125, which is installed and connected to the tower body 121, and a spray pipe 126 is connected to the spray pump 125, and the spray pipe 126 extends into the tower body 121 and is installed with a nozzle 127.

[0025] The design of the turbulent tower 12 reduces system resistance, thereby saving energy. The internal structure of the turbulent tower 12 is simple, without complex moving parts, and is easy to maintain. There is no secondary pollution. The turbulent tower 12 uses reasonable processes and equipment and will not produce secondary pollution. The processing capacity of the turbulent tower 12 can be adjusted by adjusting the process parameters to meet different processing needs. With a wide range of applications, the turbulent tower 12 is used in a variety of waste gas treatment scenarios, such as chemical, electronic, hospital, scientific research centers and other places. In addition, the turbulent tower 12 also has high processing efficiency and stable purification effect, which can effectively remove harmful substances in the exhaust gas and meet environmental protection requirements.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A complete set of bubbling turbulent absorption wet electric purification equipment for high-concentration nitrogen oxide waste gas, including a primary gas mixing bubbling tank and an air inlet pipe, characterized in that: The air inlet pipe is connected to the primary gas mixing and bubbling tank, and the exhaust gas can be introduced into the primary gas mixing and bubbling tank through the air inlet pipe. The gas outlet end of the primary gas mixing and bubbling tank is connected to the first pipeline, and the gas outlet end of the first pipeline is connected to the secondary gas mixing and bubbling tank; The second pipeline has one end connected to the secondary gas mixing bubbling tank and the other end connected to the vacuum buffer tank, the lower end of the vacuum buffer tank is connected to the circulating water tank, the circulating water tank is connected to the circulating pipe, and the circulating pipe is connected to the water ring vacuum pump; The third pipeline has one end connected to the vacuum buffer tank and the other end connected to the water ring vacuum pump. The water ring vacuum pump is connected to the fourth pipeline. The end of the fourth pipeline away from the water ring vacuum pump is connected to the turbulence tower. The upper end of the turbulence tower is connected to a wet electrostatic precipitator. The upper end of the wet electrostatic precipitator is provided with an exhaust port for discharging qualified exhaust gas.

2. The high-concentration nitrogen oxide waste gas bubbling turbulent absorption wet electrochemical purification complete set according to claim 1 is characterized in that: The air inlet pipe and the lower side of the first pipeline are both provided with air outlet holes, and there are multiple air outlet holes that gradually increase in size from top to bottom.

3. The complete set of turbulent bubbling absorption wet electrochemical purification equipment for high-concentration nitrogen oxide waste gas according to claim 1 is characterized in that: The turbulent flow tower comprises: a tower body connected to the fourth pipeline, a wet electrostatic eliminator connected to the upper end of the tower body, a packing layer provided in the tower body, a plurality of packing layers provided, a demisting layer provided on the upper side of the packing layer, and an observation window installed on the tower body for observing the interior thereof; A spray pump is installed in connection with the tower body. The spray pump is connected to a spray pipe, which extends into the tower body and is equipped with a nozzle.

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