A boiler flue gas desulfurization and denitrification treatment device

Abstract

This application relates to the technical field of waste gas treatment equipment, and discloses a boiler flue gas desulfurization and denitrification treatment device, including a desulfurization and denitrification cylinder. A filter box is fixedly installed on the left side of the desulfurization and denitrification cylinder, a mixing box is fixedly installed on the top of the desulfurization and denitrification cylinder, and a filtrate box is fixedly installed at the bottom of the desulfurization and denitrification cylinder. The same functional box is fixedly installed on the right side of the filtrate box, the right side of the desulfurization and denitrification cylinder, and the right side of the mixing box. The same conveying chamber is fixedly installed on the top of the functional box and the top of the mixing box. A chemical storage tank is fixedly installed on the top of the conveying chamber. An air inlet pipe is provided on the left side of the filter box, an activated carbon adsorption plate is provided inside the filter box, and a spraying mechanism is provided inside the desulfurization and denitrification cylinder. This application has the following advantages and effects: by setting up a conveying mechanism and a stirring mechanism, it can ensure the uniformity of the reagent concentration and improve the reaction activity, and can achieve the uniform addition of the reagent and improve the mixing efficiency.

Description

Technical Field

[0001] This application relates to the field of waste gas treatment equipment technology, and in particular to a boiler flue gas desulfurization and denitrification treatment device. Background Technology

[0002] A coal-fired boiler is a boiler that uses coal as fuel. After the heat from the coal is converted, steam is produced for industrial production. However, not all the heat is effectively converted, and some is wasted, which leads to efficiency issues. Coal-fired boilers are widely used, but they produce a large amount of flue gas. The particulate matter, sulfur compounds, and nitrogen compounds contained in the flue gas are all substances that pollute the atmosphere. The problem of smoke and dust from coal-fired boilers has always been a concern.

[0003] A search revealed a patent document with authorization announcement number CN218980831U, which discloses a boiler flue gas desulfurization and denitrification treatment device. The device includes a barrel body and an outlet pipe, a water outlet pipe, and a connecting pipe fixedly connected to the outer wall of the barrel body. A hollow rod is installed inside the barrel body. Multiple horizontal spray pipes are symmetrically fixedly connected to the two sides of the hollow rod. Multiple evenly distributed atomizing nozzles are fixedly connected to the lower wall of each spray pipe. A motor is fixedly installed at the upper center of the barrel body, with its output end penetrating into the barrel body and fixedly connected to the upper end of the hollow rod. A water injection mechanism is fixedly installed on the outer wall of the hollow rod. A preliminary filtration mechanism is fixedly installed at the end of the connecting pipe. This device can evenly spray the reactant, allowing the boiler flue gas to fully react with the reactant, effectively improving the desulfurization and denitrification effect and facilitating the preliminary filtration of large particulate impurities in the boiler flue gas.

[0004] In practical use, it has been found that existing devices suffer from uneven mixing of reagents, resulting in insufficient reaction and low waste liquid treatment efficiency, which makes it difficult to meet the requirements of efficient, environmentally friendly and economical treatment. Therefore, we propose a boiler flue gas desulfurization and denitrification treatment device to solve the above problems. Utility Model Content

[0005] The purpose of this application is to address the shortcomings of existing technologies, such as uneven mixing of reagents leading to insufficient reaction and low waste liquid treatment efficiency, which makes it difficult to meet the requirements of efficient, environmentally friendly and economical treatment. Therefore, a boiler flue gas desulfurization and denitrification treatment device is proposed.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a boiler flue gas desulfurization and denitrification treatment device, comprising a desulfurization and denitrification cylinder, a filter box fixedly installed on the left side of the desulfurization and denitrification cylinder, a mixing box fixedly installed on the top of the desulfurization and denitrification cylinder, a filtrate tank fixedly installed at the bottom of the desulfurization and denitrification cylinder, a common functional box fixedly installed on the right side of the filtrate tank, the right side of the desulfurization and denitrification cylinder, and the right side of the mixing box, a common conveying chamber fixedly installed on the top of the functional box and the top of the mixing box, a chemical storage tank fixedly installed on the top of the conveying chamber, an air inlet pipe provided on the left side of the filter box, an activated carbon adsorption plate provided inside the filter box, and a spraying mechanism provided inside the desulfurization and denitrification cylinder; a common chemical discharge pipe provided between the chemical storage tank and the conveying chamber. A solenoid valve is installed inside the dosing pipe. A partition is fixedly installed inside the conveying chamber, located on the right side of the dosing pipe. A motor is fixedly installed on the inner wall of the right side of the functional box. A stirring mechanism and a liquid delivery mechanism are installed between the motor and the mixing box. A conveying mechanism is installed inside the conveying chamber. A rotating shaft is rotatably installed on the inner wall of the top of the functional box, with the top of the shaft extending into the conveying chamber. A partition is located on the left side of the rotating shaft. A filter plate is installed inside the filtrate tank. A dispersion mechanism is installed inside the filtrate tank. A common inlet pipe is installed between the conveying chamber and the mixing box, located on the left side of the partition. Doors are installed on the front sides of both the gas filter box and the filtrate tank. A drain pipe is installed on the rear side of the filtrate tank. An exhaust pipe is installed on the top of the desulfurization and denitrification cylinder, located on the rear side of the mixing box.

[0007] A further feature of this application is that the spraying mechanism includes a spraying seat and a spraying head, the inner wall of the desulfurization and denitrification cylinder is provided with a spraying seat, the inner side of the spraying seat is provided with a spraying head, and the desulfurization and denitrification cylinder and the filtrate tank are provided with the same liquid discharge pipe.

[0008] By adopting the above technical solution and setting up a spraying mechanism, the spray head can atomize the agent into fine droplets, which can fully contact the rising flue gas. This allows the desulfurization and denitrification components in the droplets to quickly react with sulfur dioxide and nitrogen oxides in the flue gas to generate soluble salts or harmless gases, thereby achieving the purpose of pollutant removal.

[0009] A further feature of this application is that the stirring mechanism includes a stirring shaft and a stirring rod. The stirring shaft is fixedly installed on the motor output shaft. The left end of the stirring shaft is rotatably connected to the inner wall of the left side of the mixing box. The stirring rod is provided on the stirring shaft and is located inside the mixing box.

[0010] By adopting the above technical solution and setting up a stirring mechanism, the reagent in the mixing box can be fully stirred by the stirring rod, thereby ensuring uniform reagent concentration and improving reaction activity.

[0011] A further feature of this application is that the infusion mechanism includes a water pump and an infusion pipe, the water pump is provided on the inner wall of the bottom of the mixing tank, and the same infusion pipe is provided between the water pump and the spray seat.

[0012] By adopting the above technical solution and by setting up a liquid delivery mechanism, the water pump can pressurize the uniformly mixed desulfurization and denitrification agent, and achieve the purpose of delivering it to the spray seat inside the desulfurization and denitrification cylinder through the liquid delivery pipe.

[0013] A further feature of this application is that the conveying mechanism includes a conveying shaft and a spiral blade. The same conveying shaft is rotatably installed on the inner walls of both sides of the conveying chamber. The conveying shaft is rotatably connected to the partition. A spiral blade is provided on the conveying shaft. The spiral blade is located on the left side of the partition. A gear mechanism is provided between the rotating shaft and the conveying shaft and the stirring shaft.

[0014] By adopting the above technical solution and setting up a conveying mechanism, the conveying shaft can drive the spiral blades to rotate, which can push the medicine in the conveying chamber to the left through the spiral blades and send it into the mixing box through the liquid inlet pipe, so as to achieve uniform addition of medicine and improve mixing efficiency.

[0015] A further configuration of this application is as follows: the gear mechanism includes two first bevel gears and two second bevel gears. The first bevel gears are fixedly sleeved on both ends of the rotating shaft, and the second bevel gears are fixedly sleeved on both the conveying shaft and the stirring shaft. One second bevel gear is located on the right side of the partition, and the other second bevel gear is located inside the functional box. The first bevel gears mesh with the corresponding second bevel gears.

[0016] By adopting the above technical solution and by setting a gear mechanism, the stirring shaft can drive the conveying shaft to rotate synchronously.

[0017] A further configuration of this application is as follows: the dispersion mechanism includes a dispersion shaft and a lever plate; the same dispersion shaft is rotatably mounted on the left inner wall of the filtrate tank and the right inner wall of the function box; the dispersion shaft is located above the filter plate; a lever plate is provided on the dispersion shaft; the lever plate is located inside the filtrate tank; the lever plate is adapted to the lower liquid pipe; and a transmission mechanism is provided between the dispersion shaft and the stirring shaft.

[0018] By adopting the above technical solution and setting up a dispersing mechanism, the dispersing shaft can drive the deflector plate to rotate, thereby dispersing the liquid flowing into the filtrate tank through the deflector plate, achieving uniform spreading of the liquid on the filter plate, and improving the solid-liquid separation efficiency.

[0019] A further feature of this application is that the transmission mechanism includes two transmission wheels and a transmission belt. Transmission wheels are fixedly mounted on both the dispersion shaft and the stirring shaft. The transmission wheels are located inside the functional box, and the same transmission belt is mounted on both transmission wheels.

[0020] By adopting the above technical solution and by setting up a transmission mechanism, the stirring shaft can drive the dispersing shaft to rotate synchronously.

[0021] The beneficial effects of this application are:

[0022] (1) Through the cooperation of motor, stirring shaft and stirring rod, the motor can drive the stirring rod to rotate, and the stirring rod can fully stir the reagent in the mixing box, so as to ensure uniform reagent concentration and improve reaction activity;

[0023] (2) Through the cooperation of the rotating shaft, two first bevel gears, two second bevel gears, conveying shaft and spiral blades, the stirring shaft can drive the conveying shaft to rotate synchronously, and the spiral blades can push the medicine in the conveying chamber to the left and send it into the mixing box through the liquid inlet pipe, so as to achieve uniform addition of medicine and improve mixing efficiency.

[0024] (3) Through the cooperation of two drive wheels, drive belt, dispersion shaft and dial plate, the stirring shaft can drive the dispersion shaft to rotate synchronously, the dial plate can be used to disperse the liquid flowing into the filtrate tank, and the liquid can be evenly spread on the filter plate to improve the solid-liquid separation efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a boiler flue gas desulfurization and denitrification treatment device according to this application;

[0027] Figure 2 This is a schematic diagram of the internal structure of the conveying chamber of a boiler flue gas desulfurization and denitrification treatment device according to this application;

[0028] Figure 3 This is a schematic diagram of the internal structure of the conveying chamber, mixing chamber, and functional chamber of a boiler flue gas desulfurization and denitrification treatment device according to this application;

[0029] Figure 4 This is a schematic diagram of the internal structure of the desulfurization and denitrification cylinder, conveying chamber, mixing box, functional box, air filter box and filtrate box of a boiler flue gas desulfurization and denitrification treatment device according to this application.

[0030] In the diagram: 1. Desulfurization and denitrification cylinder; 2. Air filter box; 3. Mixing box; 4. Conveying chamber; 5. Functional box; 6. Filtrate box; 7. Chemical storage box; 201. Air inlet pipe; 202. Activated carbon adsorption plate; 101. Spray seat; 102. Spray head; 301. Stirring shaft; 302. Stirring rod; 303. Water pump; 304. Infusion pipe; 401. Partition plate; 402. Conveying shaft; 403. Spiral blade; 501. Motor; 502. Rotating shaft; 503. First bevel gear; 504. Second bevel gear; 601. Filter plate; 602. Dispersion shaft; 603. Pulley; 505. Transmission wheel; 506. Transmission belt. Detailed Implementation

[0031] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] See Figures 1-4 This application provides a boiler flue gas desulfurization and denitrification treatment device, including a desulfurization and denitrification cylinder 1. A filter box 2 is fixedly installed on the left side of the desulfurization and denitrification cylinder 1, a mixing box 3 is fixedly installed on the top of the desulfurization and denitrification cylinder 1, and a filtrate box 6 is fixedly installed at the bottom of the desulfurization and denitrification cylinder 1. The same functional box 5 is fixedly installed on the right side of the filtrate box 6, the right side of the desulfurization and denitrification cylinder 1, and the right side of the mixing box 3. The same conveying chamber 4 is fixedly installed on the top of the functional box 5 and the top of the mixing box 3. A chemical storage tank 7 is fixedly installed on the top of the conveying chamber 4. An air inlet pipe 201 is provided on the left side of the filter box 2. An activated carbon adsorption plate 202 is provided inside the filter box 2. A spraying mechanism is provided inside the desulfurization and denitrification cylinder 1. A chemical dispensing pipe is provided between the chemical storage tank 7 and the conveying chamber 4. A solenoid valve is provided inside the chemical dispensing pipe. A solenoid valve is fixedly installed inside the conveying chamber 4. The device is equipped with a partition 401, which is located on the right side of the drug delivery pipe. A motor 501 is fixedly installed on the inner wall of the right side of the functional box 5. A stirring mechanism and a liquid delivery mechanism are provided between the motor 501 and the mixing box 3. A conveying mechanism is provided in the conveying chamber 4. A rotating shaft 502 is rotatably installed on the inner wall of the top of the functional box 5. The top of the rotating shaft 502 extends into the conveying chamber 4. The partition 401 is located on the left side of the rotating shaft 502. A filter plate 601 is provided in the filtrate tank 6. A dispersion mechanism is provided in the filtrate tank 6. The same liquid inlet pipe is provided between the conveying chamber 4 and the mixing box 3. The liquid inlet pipe is located on the left side of the partition 401. A door is provided on the front side of the gas filter box 2 and the front side of the filtrate tank 6. A drain pipe is provided on the rear side of the filtrate tank 6. An exhaust pipe is provided on the top of the desulfurization and denitrification cylinder 1. The exhaust pipe is located on the rear side of the mixing box 3.

[0033] Specifically, the spraying mechanism includes a spray seat 101 and a spray head 102. The spray seat 101 is provided on the inner wall of the desulfurization and denitrification cylinder 1, and the spray head 102 is provided on the inner side of the spray seat 101. The same liquid discharge pipe is provided between the desulfurization and denitrification cylinder 1 and the filtrate tank 6.

[0034] Specifically, the stirring mechanism includes a stirring shaft 301 and a stirring rod 302. The stirring shaft 301 is fixedly installed on the output shaft of the motor 501. The left end of the stirring shaft 301 is rotatably connected to the inner wall of the left side of the mixing box 3. The stirring rod 302 is provided on the stirring shaft 301 and is located inside the mixing box 3.

[0035] Specifically, the infusion mechanism includes a water pump 303 and an infusion pipe 304. The water pump 303 is installed on the inner wall of the bottom of the mixing tank 3, and the same infusion pipe 304 is installed between the water pump 303 and the spray seat 101.

[0036] Specifically, the conveying mechanism includes a conveying shaft 402 and a spiral blade 403. The same conveying shaft 402 is rotatably installed on the inner walls of both sides of the conveying chamber 4. The conveying shaft 402 is rotatably connected to the partition 401. The spiral blade 403 is provided on the conveying shaft 402 and is located on the left side of the partition 401. A gear mechanism is provided between the rotating shaft 502, the conveying shaft 402, and the stirring shaft 301.

[0037] Specifically, the gear mechanism includes two first bevel gears 503 and two second bevel gears 504. The first bevel gears 503 are fixedly sleeved on both ends of the rotating shaft 502. The second bevel gears 504 are fixedly sleeved on both the conveying shaft 402 and the stirring shaft 301. One second bevel gear 504 is located on the right side of the partition 401, and the other second bevel gear 504 is located inside the function box 5. The first bevel gears 503 mesh with the corresponding second bevel gears 504.

[0038] Specifically, the dispersion mechanism includes a dispersion shaft 602 and a lever 603. The same dispersion shaft 602 is rotatably mounted on the inner left side of the filtrate tank 6 and the inner right side of the function box 5. The dispersion shaft 602 is located above the filter plate 601. A lever 603 is provided on the dispersion shaft 602. The lever 603 is located inside the filtrate tank 6 and is adapted to the lower liquid pipe. A transmission mechanism is provided between the dispersion shaft 602 and the stirring shaft 301.

[0039] Specifically, the transmission mechanism includes two transmission wheels 505 and a transmission belt 506. The transmission wheels 505 are fixedly sleeved on both the dispersing shaft 602 and the stirring shaft 301. The transmission wheels 505 are located inside the functional box 5, and the same transmission belt 506 is sleeved on both transmission wheels 505.

[0040] In this application, during operation, the flue gas generated by the boiler first enters the filter box 2 through the inlet pipe 201. The activated carbon adsorption plate 202 inside the box can effectively intercept large particulate impurities such as dust and tar, as well as some organic pollutants in the flue gas by utilizing its porous structure and adsorption characteristics. This can reduce the load of subsequent desulfurization and denitrification treatment and protect the core treatment components. The flue gas that has been preliminarily purified then enters the desulfurization and denitrification cylinder 1.

[0041] The desulfurization and denitrification agents stored in the storage tank 7 can fall into the conveying chamber 4 after the control system opens the solenoid valve of the dispensing pipe. At this time, the motor 501 in the function box 5 starts, and its output shaft drives the stirring shaft 301 and the stirring rod 302 to rotate, which can fully stir the agents in the mixing chamber 3, so as to ensure uniform agent concentration and improve reaction activity. At the same time, the power of the motor 501 is transmitted through the gear mechanism: the first bevel gears 503 at both ends of the rotating shaft 502 mesh with the second bevel gears 504 on the conveying shaft 402 and the stirring shaft 301, respectively, which can drive the conveying shaft 402 to rotate, so that the spiral blades 403 can push the agents in the conveying chamber 4 to the left and send them into the mixing chamber 3 through the liquid inlet pipe, so as to achieve uniform addition of agents and improve mixing efficiency.

[0042] The uniformly mixed desulfurization and denitrification agents are pressurized by the water pump 303 at the bottom of the mixing tank 3 and delivered to the spray seat 101 and spray head 102 inside the desulfurization and denitrification cylinder 1 through the liquid delivery pipe 304. The agents are atomized into fine droplets by the spray head 102, which fully contact the rising flue gas. This allows the desulfurization and denitrification components in the droplets to quickly react with sulfur dioxide and nitrogen oxides in the flue gas to generate soluble salts or harmless gases, thereby achieving the purpose of pollutant removal. The flue gas containing liquid after the reaction flows downward, and the liquid flows into the filter tank 6 through the liquid outlet pipe.

[0043] In the filtrate tank 6, the stirring shaft 301 drives the dispersing shaft 602 and the agitator plate 603 to rotate via the transmission wheel 505 and the transmission belt 506. The agitator plate 603 disperses the incoming liquid, enabling the liquid to spread evenly on the filter plate 601 and improving the solid-liquid separation efficiency. The filtered clear liquid is discharged from the drain pipe and enters the subsequent wastewater treatment stage. The intercepted solid impurities are retained on the filter plate 601 and cleaned periodically. Finally, the clean flue gas after desulfurization and denitrification treatment is discharged from the exhaust pipe at the top of the desulfurization and denitrification cylinder 1, meeting the emission standards and being discharged into the atmosphere. This effectively reduces pollutant emissions and minimizes reagent waste and environmental pollution.

Claims

1. A boiler flue gas desulfurization and denitrification treatment device, characterized in that, The device includes a desulfurization and denitrification cylinder (1), a filter box (2) is fixedly installed on the left side of the desulfurization and denitrification cylinder (1), a mixing box (3) is fixedly installed on the top of the desulfurization and denitrification cylinder (1), a filtrate box (6) is fixedly installed at the bottom of the desulfurization and denitrification cylinder (1), the same functional box (5) is fixedly installed on the right side of the filtrate box (6), the right side of the desulfurization and denitrification cylinder (1) and the right side of the mixing box (3), the same conveying chamber (4) is fixedly installed on the top of the functional box (5) and the top of the mixing box (3), a chemical storage box (7) is fixedly installed on the top of the conveying chamber (4), an air inlet pipe (201) is provided on the left side of the filter box (2), an activated carbon adsorption plate (202) is provided inside the filter box (2), and a spraying mechanism is provided inside the desulfurization and denitrification cylinder (1). A common drug delivery pipe is provided between the drug storage tank (7) and the delivery chamber (4). A solenoid valve is installed inside the drug delivery pipe. A partition (401) is fixedly installed inside the delivery chamber (4). The partition (401) is located on the right side of the drug delivery pipe. A motor (501) is fixedly installed on the inner wall of the right side of the functional box (5). A stirring mechanism and an infusion mechanism are provided between the motor (501) and the mixing box (3). A delivery mechanism is provided inside the delivery chamber (4). A rotating shaft (502) is rotatably installed on the inner wall of the top of the functional box (5). The top end of the rotating shaft (502) extends... Inside the conveying chamber (4), the partition (401) is located to the left of the rotating shaft (502). A filter plate (601) is installed inside the filtrate tank (6). A dispersing mechanism is installed inside the filtrate tank (6). The conveying chamber (4) and the mixing tank (3) are connected by the same inlet pipe, which is located to the left of the partition (401). Doors are provided on the front side of the gas filter box (2) and the front side of the filtrate tank (6). A drain pipe is provided on the rear side of the filtrate tank (6). An exhaust pipe is provided on the top of the desulfurization and denitrification cylinder (1), which is located on the rear side of the mixing tank (3).

2. The boiler flue gas desulfurization and denitrification treatment device according to claim 1, characterized in that: The spraying mechanism includes a spray seat (101) and a spray head (102). The inner wall of the desulfurization and denitrification cylinder (1) is provided with a spray seat (101), and the inner side of the spray seat (101) is provided with a spray head (102). The desulfurization and denitrification cylinder (1) and the filtrate tank (6) are provided with the same liquid discharge pipe.

3. The boiler flue gas desulfurization and denitrification treatment device according to claim 1, characterized in that: The stirring mechanism includes a stirring shaft (301) and a stirring rod (302). The stirring shaft (301) is fixedly installed on the output shaft of the motor (501). The left end of the stirring shaft (301) is rotatably connected to the inner wall of the left side of the mixing box (3). The stirring rod (302) is provided on the stirring shaft (301) and the stirring rod (302) is located inside the mixing box (3).

4. The boiler flue gas desulfurization and denitrification treatment device according to claim 1, characterized in that: The infusion mechanism includes a water pump (303) and an infusion pipe (304). The water pump (303) is installed on the inner wall of the bottom of the mixing tank (3). The same infusion pipe (304) is installed between the water pump (303) and the spray seat (101).

5. The boiler flue gas desulfurization and denitrification treatment device according to claim 1, characterized in that: The conveying mechanism includes a conveying shaft (402) and a spiral blade (403). The same conveying shaft (402) is rotatably installed on the inner walls of both sides of the conveying chamber (4). The conveying shaft (402) is rotatably connected to the partition (401). The spiral blade (403) is provided on the conveying shaft (402). The spiral blade (403) is located on the left side of the partition (401). A gear mechanism is provided between the rotating shaft (502), the conveying shaft (402), and the stirring shaft (301).

6. The boiler flue gas desulfurization and denitrification treatment device according to claim 5, characterized in that: The gear mechanism includes two first bevel gears (503) and two second bevel gears (504). The first bevel gears (503) are fixedly sleeved on both ends of the rotating shaft (502). The second bevel gears (504) are fixedly sleeved on both the conveying shaft (402) and the stirring shaft (301). One second bevel gear (504) is located on the right side of the partition (401), and the other second bevel gear (504) is located inside the function box (5). The first bevel gears (503) mesh with the corresponding second bevel gears (504).

7. The boiler flue gas desulfurization and denitrification treatment device according to claim 1, characterized in that: The dispersion mechanism includes a dispersion shaft (602) and a lever (603). The same dispersion shaft (602) is rotatably mounted on the left inner wall of the filtrate tank (6) and the right inner wall of the functional box (5). The dispersion shaft (602) is located above the filter plate (601). A lever (603) is provided on the dispersion shaft (602). The lever (603) is located inside the filtrate tank (6). The lever (603) is adapted to the lower liquid pipe. A transmission mechanism is provided between the dispersion shaft (602) and the stirring shaft (301).

8. The boiler flue gas desulfurization and denitrification treatment device according to claim 7, characterized in that: The transmission mechanism includes two transmission wheels (505) and a transmission belt (506). The transmission wheels (505) are fixedly sleeved on both the dispersing shaft (602) and the stirring shaft (301). The transmission wheels (505) are located inside the functional box (5). The same transmission belt (506) is sleeved on both transmission wheels (505).

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