[0021] The present invention will now be described in further detail with reference to the drawings. These drawings are all simplified schematic diagrams, which merely illustrate the basic structure of the present invention in a schematic manner, so they only show the structures related to the present invention.
[0022] Such as Figure 1-6 Shown is the best embodiment of the present invention, a complete system for wet removal of PM2.5 and waste heat recovery and utilization. It includes an exhaust gas cooler 1 and a water vapor phase change and condensation chamber arranged in series from front to back in the process sequence. 2. Electrostatic precipitator 3, desulfurization tower 4, exhaust gas reheater 5, induced draft fan 6 and chimney 7, exhaust gas inlet 1-1 is provided on exhaust gas cooler 1, and heat exchanger 1-2 is installed in exhaust gas cooler 1 , The electrostatic precipitator 3 is a vertical conical electrostatic precipitator, the vertical conical electrostatic precipitator includes a shell 3-1, a plurality of central corona poles 3-2, the left dust collecting plate 3-3 and the right dust collecting The pole plate 3-4, the plurality of central corona poles 3-2 are erected in the housing 3-1, and the plurality of central corona poles 3-2 are aligned vertically and horizontally, and set in a row from the front to the back. The central corona electrodes 3-2 are arranged side by side in multiple rows, a left dust collecting electrode plate 3-3 and a right dust collecting electrode plate 3-4 are a dust collecting electrode unit, and the dust collecting electrode unit is arranged in multiple rows , And the dust collecting plate units of two adjacent rows are staggered with each other, that is, the left dust collecting plate 3-3 and the right dust collecting plate 3-4 of the odd rows of dust collecting plate units are respectively set in the center of the odd rows On both sides of the corona electrode 3-2, the left dust collecting electrode plate 3-3 and the right dust collecting electrode plate 3-4 of the even-numbered dust collecting electrode plate unit are respectively set on the center corona electrode 3-2 of the even-numbered row On both sides, a tortuous flow channel 3-5 is formed between the dust collecting plate unit and the left dust collecting plate 3-3 and the right dust collecting plate 3-4.
[0023] The left dust collecting plate 3-3 consists of the left vertical plate 3-3-1 and the left inclined plate 3-3-2, the left vertical plate 3-3-1 is vertically arranged, and the upper end of the left inclined plate 3-3-2 is The bottom of the left vertical plate 3-3-1 is fixedly connected, the angle between the left inclined plate 3-3-2 and the left vertical plate 3-3-1 is greater than 90°, and the right dust collecting plate 3-4 is formed by the right vertical plate 3-4-1 and the right inclined plate 3-4-2, the right vertical plate 3-4-1 is arranged vertically, the upper end of the right inclined plate 3-4-2 and the bottom of the right vertical plate 3-4-1 are fixedly connected , The angle between the right inclined plate 3-4-2 and the right vertical plate 3-4-1 is greater than 90°, the bottom of the left inclined plate 3-3-2 and the bottom of the right inclined plate 3-4-2 are close to each other but No contact, the front and rear ends of the left dust collecting plate 3-3 are detachably connected to the front and rear inner walls of the housing 3-1, and the front and rear ends of the right dust collecting plate 3-4 are connected to the inside of the housing 3-1, respectively The front and rear inner walls can be detachably connected. The detachment and connection structure may specifically be that a card slot is opened on the front and rear inner walls of the housing 3-1, and the front and rear ends of the left dust collecting electrode plate 3-3 and the right dust collecting electrode plate 3-4 are buckled in the card slots in. It is convenient for the dust collector to be removed and cleaned regularly. The central corona pole 3-2 is all negative.
[0024] The water vapor phase change and condensation chamber 2 includes a condensation chamber shell 2-1, a sedimentation chamber shell 2-2 is arranged at the lower end of the condensation chamber shell 2-1, and a condensation chamber shell 2-1 is arranged on the lower end of the condensation chamber shell 2-1. Condensing chamber inlet, the top of the condensing chamber shell 2-1 is provided with a condensing chamber outlet, the direction of the exhaust gas in the vapor phase change and condensing chamber 2 is from bottom to top, and the condensing chamber inlet is connected with the exhaust gas cooler 1. The outlet of the condensing chamber is communicated with the inlet of the electrostatic precipitator, the swirling vanes 2-3 and the circular tube 2-4 are arranged in the condensing chamber shell 2-1, and the top of the circular tube 2-4 and the condenser shell 2 -1 The top inside is fixedly connected, and the top of the round pipe 2-4 is connected with the external steam. The bottom of the round pipe 2-4 is provided with three evenly distributed steam nozzles 2-5, and the three steam nozzles 2-5 are mutually connected. The center line of the steam nozzle 2-5 and the circular tube 2-4 is 45°. The swirling blades 2-3 are spirally arranged around the circular tube 2-4 from bottom to top. The swirling blades 2 -3 is also connected with a rotary drive device, the rotary drive device can choose a motor to drive the turntable, the swirl blade 2-3 and the turntable are fixedly connected,
[0025] The outer circumference of the central corona pole 3-2 is provided with uniform barbed wires 3-2-1, and the ends of the barbed wires 3-2-1 are flat ends. The exhaust gas cooler 1 is connected to the exhaust gas reheater 5, and the top of the circular pipe 2-4 is connected to the steam outlet of the exhaust gas cooler 1. The top of the housing 3-1 is also provided with a bracket 3-7, and the bracket 3-7 is provided with a plurality of liquid nozzles 3-6 with the spray direction downward.
[0026] In the complete system for wet removal of PM2.5 and waste heat recovery and utilization of the present invention, high-temperature exhaust gas first enters the exhaust gas cooler 1 from the exhaust gas inlet 1-1, and the exhaust gas enters the water vapor phase change and condensation chamber 2 after heat exchange and temperature reduction. The particulate matter in the exhaust gas is condensed in the water vapor phase change and condensation chamber 2. The exhaust gas is condensed before dust removal. The purpose of condensing is to condense small particles into large particles, which is conducive to the subsequent dust removal effect and makes it easier to remove fine particles below PM2.5. The present invention can maintain sufficient steam volume by arranging three nozzles and uniform arrangement, so that fine particles and water vapor can be fully condensed. The setting of rotating swirl blades can increase the turbulence intensity of gas, and further increase the collision probability of particles. The flow can extend the time of the particles in the water vapor phase change and condensation chamber, and improve more condensation effect. The rotating swirling blade can also throw the large particles falling on the blade to the dust collector housing, and then flow to the The settling chamber can not only achieve the preliminary dust removal effect, but also improve the condensation efficiency.
[0027] The condensed and treated exhaust gas then enters the electrostatic precipitator 3. In the present invention, the electrostatic precipitator 3 is a vertical cone-shaped electrostatic precipitator, and the left dust collecting electrode plate 3-3 and the right dust collecting electrode plate 3-4 are paired After installation, it is roughly tapered. The left dust collecting plate 3-3 and the right dust collecting plate 3-4 of the dust collecting plate unit in the first row are respectively arranged on both sides of the central corona electrode 3-2 of the odd-numbered row. , The left dust collecting plate 3-3 and the right dust collecting plate 3-4 of the dust collecting plate unit of the second row are respectively arranged on both sides of the central corona electrode 3-2 of the even-numbered row. The left dust collecting plate 3-3 and the right dust collecting plate 3-4 of the dust collecting plate unit are respectively arranged on both sides of the central corona electrode 3-2 of the odd-numbered rows...and so on, the dust collecting plate unit And between the left dust collecting plate 3-3 and the right dust collecting plate 3-4 to form a tortuous flow channel 3-5. After the condensed exhaust gas and particulate matter enter the electrostatic precipitator, it can flow in The tortuous flow between the roads makes the airflow inside the dust collector form a double vortex, which effectively increases the probability of particle collisions, further condenses fine particles, and increases the airflow residence time, which makes it easier for particulate pollutants to be adsorbed on the dust collecting plate for collection The fine particles on the dust collecting electrode plate can be quickly cleaned by washing water, further improving the dust removal effect, and more effectively preventing secondary dust; reducing the volume of the electrostatic precipitator, and the economy is better. The liquid nozzle 3-6 can not only clean the dust collecting plate, but also can slow down the left dust collecting plate 3-3 and the right inclined plate 3-4-2 due to the arrangement of the left inclined plate 3-3-2 and the right inclined plate 3-4-2. The liquid flow rate on the right dust collecting plate 3-4 avoids uneven distribution of the liquid film, allowing more particles to enter the liquid film, and further improving the dust removal effect.
[0028] Then the dust-removed exhaust gas enters the desulfurization tower 4 for desulfurization, and then enters the exhaust gas reheater 5 for reheating. Finally, the induced draft fan 6 and the chimney 7 are discharged into the open air. The induced draft fan 6 is also the power source for the exhaust gas. Part of the high-temperature water after heat exchange in the exhaust gas cooler 1 provides steam to the vapor phase change and condensation chamber 2, and the other part is used as a heat source to enter the exhaust gas reheater 5, and the cooling water after heat exchange from the exhaust gas reheater 5 is provided to the exhaust gas cooler 1 As a cooling energy, the waste heat is recycled to form a waste heat recovery device, which saves costs and more effectively removes fine particles that cannot be removed by the dehumidifying electrostatic precipitator alone. The waste heat recovery device effectively utilizes the waste heat of the exhaust gas to heat the circulating water at room temperature to the steam state. Part of the heated steam provides steam for the water vapor phase change and condensation chamber 2, and the other part enters the exhaust gas reheater to perform the waste heat cycle. It can effectively remove the fine particles that cannot be removed by the dehumidifying electrostatic precipitator alone, and can also prevent the blower and pipeline frost and acid dew point corrosion caused by the low exhaust gas temperature.
[0029] Taking the above-mentioned ideal embodiment according to the present invention as enlightenment, through the above-mentioned description content, relevant staff can make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the content of the description, and its technical scope must be determined according to the scope of the claims.
