Desulfurization and denitration pretreatment device before flue gas catalytic combustion
By adopting an orifice-shaped diversion box and an arc-shaped drain pipe design in the desulfurization and denitrification pretreatment device before flue gas catalytic combustion, combined with a gas flow sensor and a cylinder-driven resistance arc plate, the problems of excessive pressure and excessive flow rate of flue gas in the box are solved. This achieves full contact between the purified mixture and the flue gas and the flow rate regulation, thereby improving reaction efficiency and exhaust safety.
Patent Information
- Application Number
- CN202520471033.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-18
AI Technical Summary
Common desulfurization and denitrification pretreatment devices before catalytic combustion of flue gas lack the functions of wind resistance and improving reaction efficiency. As a result, the purified mixture cannot fully contact and react with the flue gas after being sprayed. In addition, the excessive pressure of the flue gas in the chamber leads to excessive exhaust speed, which affects the desulfurization and denitrification effect and exhaust safety.
The design employs an orifice-shaped diversion box and an arc-shaped drain pipe, allowing the purified mixture to flow along the four sides of the pretreatment tank. Combined with a gas flow sensor and a cylinder-driven resistance arc plate, the flue gas velocity is adjusted to achieve wind resistance and improve reaction efficiency.
This method achieves maximum contact between the purified liquid and the flue gas, slows down the flue gas flow rate, improves reaction efficiency, ensures exhaust safety, and solves the problem of poor desulfurization and denitrification effects.
Smart Images
Figure CN223874776U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of flue gas desulfurization and denitrification, especially to a flue gas desulfurization and denitrification pretreatment device before catalytic combustion. BACKGROUND
[0002] Thermal power generation is a method of generating electricity by using heat energy obtained by burning fuel. This method of generating electricity produces flue gas containing sulfur and nitrogen, which needs to be purified by a purification device before being discharged. When purifying the flue gas, the sulfur oxides, nitrogen oxides, dust particles and other harmful substances in the flue gas need to be removed by spraying a purification mixture.
[0003] The common flue gas desulfurization and denitrification pretreatment device before catalytic combustion only includes the flue gas purification device, which can perform desulfurization and denitrification pretreatment on the flue gas. However, it lacks the functions of wind resistance and reaction efficiency improvement, and cannot guarantee the desulfurization and denitrification effect and the safety of the exhaust gas. After the purification mixture is sprayed, it cannot fully contact and react with the flue gas, and the pressure of the flue gas in the box is too high, which leads to the problem of too fast exhaust speed, affecting the desulfurization and denitrification effect and the safety of the exhaust gas.
[0004] Therefore, in view of the above-mentioned problems of the common flue gas desulfurization and denitrification pretreatment device before catalytic combustion, which lacks the functions of wind resistance and reaction efficiency improvement, and cannot guarantee the desulfurization and denitrification effect and the safety of the exhaust gas, a new type of flue gas desulfurization and denitrification pretreatment device before catalytic combustion is urgently needed. CONTENT OF THE UTILITY MODEL
[0005] In order to overcome the problems of the common flue gas desulfurization and denitrification pretreatment device before catalytic combustion, which lacks the functions of wind resistance and reaction efficiency improvement, and cannot guarantee the desulfurization and denitrification effect and the safety of the exhaust gas, a new type of flue gas desulfurization and denitrification pretreatment device before catalytic combustion is urgently needed.
[0006] The technical scheme of the utility model is as follows: a flue gas desulfurization and denitrification pretreatment device before catalytic combustion, comprising a pretreatment box, a top plate, a mouth-shaped shunt box, an arc-shaped liquid discharge pipe, a special-shaped pipeline, an exhaust pipeline, a connecting round block, a connecting shaft, a wind resistance plate, a mounting plate, a gas cylinder and a resistance arc plate, the top of the pretreatment box is provided with the top plate, the top of the top plate is provided with the mouth-shaped shunt box, the bottom of the mouth-shaped shunt box is provided with a plurality of arc-shaped liquid discharge pipes at equal intervals, the top of the left side of the pretreatment box is provided with the special-shaped pipeline, the bottom of the special-shaped pipeline is provided with the exhaust pipeline, the front side center of the exhaust pipeline is provided with the connecting round block, the rear side of the connecting round block is provided with the connecting shaft, the connecting shaft penetrates the exhaust pipeline and is rotationally connected to the rear side inside the exhaust pipeline, a plurality of wind resistance plates are arranged at equal intervals around the connecting shaft, the front side top of the exhaust pipeline is provided with the mounting plate, the center of the top of the mounting plate is provided with the gas cylinder, and the output end of the bottom of the gas cylinder is connected with the resistance arc plate penetrating the mounting plate.
[0007] Preferably, the purification mixture is added to the inside of the split-flow box through the first liquid inlet pipe by an external liquid feeding device, and the purification mixture in the split-flow box is discharged through the arc-shaped liquid discharge pipes, and due to the angle of the arc-shaped liquid discharge pipes, the purification mixture flows downward along the four side walls of the pretreatment box, so that the purification mixture can be maximally mixed with the flue gas, and the reaction efficiency is improved, the flow rate of the upward flowing flue gas is detected by the gas flow sensor of the FS4003 type, and the detection result is transmitted to the external PLC control, and when the flue gas flow speed is too fast, the air cylinder is started, the resistance arc plate is pushed downward by the air cylinder, and the resistance arc plate is attached to the connecting circular block, the friction between the resistance arc plate and the connecting circular block slows down the rotation speed of the connecting shaft, so that the flue gas is blocked by the baffle, the flow rate of the flue gas is slowed down, and the function of the baffle is realized.
[0008] Preferably, the first liquid inlet pipe is arranged at the middle of the left side of the top of the split-flow box, and the bottom end of the arc-shaped liquid discharge pipe penetrates through the top plate and is located in the inside of the pretreatment box.
[0009] Preferably, the bottom of the resistance arc plate is attached to the connecting circular block.
[0010] Preferably, the second liquid inlet pipe is arranged at the center of the top of the top plate, and the bottom end of the second liquid inlet pipe is connected with the plate-shaped split-flow box penetrating through the top plate.
[0011] Preferably, the bottom of the plate-shaped split-flow box is arranged with a plurality of shower heads at equal intervals, and the bottom of the pretreatment box is arranged with a liquid discharge port at the center.
[0012] Preferably, the four corners of the bottom of the pretreatment box are symmetrically arranged with four supporting legs, and the bottom end of the supporting leg is arranged with a self-locking universal pulley.
[0013] Preferably, the bottom end of the middle of the right side of the pretreatment box is arranged with an air inlet pipe.
[0014] Preferably, the top end of the front side of the inside of the pretreatment box is arranged with a gas flow sensor.
[0015] The beneficial effects of the utility model are as follows:
[0016] 1. The purified mixed solution is added into the inside of the mouth-shaped shunt box through the first liquid inlet pipe by the external liquid feeding device, and the purified mixed solution in the mouth-shaped shunt box is discharged through a plurality of arc-shaped liquid discharge pipes, so that the purified mixed solution flows downward along the four side surfaces of the pretreatment box due to the angle of the arc-shaped liquid discharge pipe, thereby maximizing the mixing and contacting of the purified mixed solution with the flue gas, and the reaction efficiency is improved;
[0017] 2. The gas flow sensor of model FS4003 is used to detect the flow rate of the upward flowing flue gas, and the detection result is transmitted to the external PLC control. When the flue gas flow rate is too fast, the air cylinder is started, the resistance arc plate is pushed downward by the air cylinder, and the resistance arc plate is attached to the connecting round block until the friction force between the resistance arc plate and the connecting round block slows down the rotation speed of the connecting shaft, so that the resistance plate blocks the flue gas, the flow rate of the flue gas is slowed down, and the air resistance function is realized. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 A left view overall structure schematic diagram of the desulfurization and denitrification pretreatment device before flue gas catalytic combustion is shown.
[0019] Figure 2 A right view overall structure schematic diagram of the desulfurization and denitrification pretreatment device before flue gas catalytic combustion is shown.
[0020] Figure 3 A cross-sectional structure schematic diagram of the desulfurization and denitrification pretreatment device before flue gas catalytic combustion is shown.
[0021] Figure 4 A cross-sectional structure schematic diagram of the plate-shaped shunt box of the desulfurization and denitrification pretreatment device before flue gas catalytic combustion is shown.
[0022] Figure 5 A cross-sectional structure schematic diagram of the mouth-shaped shunt box of the desulfurization and denitrification pretreatment device before flue gas catalytic combustion is shown.
[0023] Figure 6 A structure schematic diagram of the special-shaped pipe of the desulfurization and denitrification pretreatment device before flue gas catalytic combustion is shown.
[0024] Figure 7 A structure schematic diagram of the air resistance assembly of the desulfurization and denitrification pretreatment device before flue gas catalytic combustion is shown.
[0025] Explanation of reference signs: 1, pretreatment box; 2, top plate; 3, mouth-shaped distribution box; 4, first liquid inlet pipe; 5, arc-shaped liquid discharge pipe; 6, special-shaped pipeline; 7, exhaust pipeline; 8, connecting round block; 9, connecting shaft; 10, wind resistance plate; 11, mounting plate; 12, air cylinder; 13, resistance arc plate; 14, second liquid inlet pipe; 15, plate-shaped distribution box; 16, shower nozzle; 17, liquid discharge port; 18, supporting leg; 19, self-locking universal pulley; 20, air inlet pipe; 21, gas flow sensor. DETAILED DESCRIPTION
[0026] The utility model will be further explained in connection with the drawings and examples.
[0027] Please refer to Figures 1-7The utility model provides a kind of embodiment: a flue gas catalytic combustion desulfurization and denitrification pretreatment device before, including pretreatment box 1;Still including top plate 2, mouth shape shunt box 3, arc liquid discharge pipe 5, special-shaped pipeline 6, exhaust duct 7, connecting round block 8, connecting shaft 9, wind baffle 10, mounting plate 11, cylinder 12 and resistance arc plate 13, the top of pretreatment box 1 is provided with top plate 2, the top of top plate 2 is provided with mouth shape shunt box 3, the bottom of mouth shape shunt box 3 is provided with arc liquid discharge pipe 5 several equally spaced, the top of pretreatment box 1 left side is provided with special-shaped pipeline 6, the bottom of special-shaped pipeline 6 is provided with exhaust duct 7, the front side center of exhaust duct 7 is provided with connecting round block 8, the rear side of connecting round block 8 is provided with connecting shaft 9, connecting shaft 9 is connected with the rear side inside exhaust duct 7 and rotates, the periphery of connecting shaft 9 is provided with wind baffle 10 several equally spaced, the front side top of exhaust duct 7 is provided with mounting plate 11, the center of mounting plate 11 top is provided with cylinder 12, the output end of cylinder 12 bottom is connected with resistance arc plate 13 and is penetrated mounting plate 11, by outside liquid feeding device, purified mixed solution is added to the inside of mouth shape shunt box 3 by first liquid inlet pipe 4, and the purified mixed solution in mouth shape shunt box 3 is discharged by arc liquid discharge pipe 5 several, due to the angle of arc liquid discharge pipe 5, the purified mixed solution is made to flow downwards to the four side surfaces in the inside of pretreatment box 1, to make the purified mixed solution maximum limit and flue gas mixed contact, to realize the function of improving reaction efficiency, the flow rate of upwards flowing flue gas is detected by gas flow sensor 21 of model FS4003, and the detection result is transmitted to the outside PLC control, when flue gas flow speed is too fast, cylinder 12 is started, cylinder 12 pushes resistance arc plate 13 to move downwards, until resistance arc plate 13 and connecting round block 8 are pasted, the speed of connecting shaft 9 rotation is slowed down by the friction force between resistance arc plate 13 and connecting round block 8, so that flue gas is blocked by wind baffle 10, so that the flow rate of flue gas is slowed down, to realize the function of wind blocking, to solve the common flue gas catalytic combustion desulfurization and denitrification pretreatment device before, only contain flue gas purification, can carry out desulfurization and denitrification pretreatment to flue gas, but lack wind blocking and the function of improving reaction efficiency, cannot guarantee the effect of desulfurization and denitrification and exhaust safety, purified mixed solution is likely to spray out and cannot fully contact reaction with flue gas, and flue gas is likely to appear in the pressure of box and lead to the speed of discharge being too fast, affect desulfurization and denitrification effect and exhaust safety problem.
[0028] Please refer to Figures 2-7In the embodiment, the bottom of the plate-shaped shunt box 15 is provided with a plurality of shower nozzles 16 at equal intervals, the center of the bottom of the pretreatment box 1 is provided with a liquid outlet 17, four support legs 18 are symmetrically arranged at the four corners of the bottom of the pretreatment box 1, the bottom end of the support leg 18 is provided with a self-locking universal pulley 19, the bottom end of the pretreatment box 1 is provided with an air inlet pipe 20, the top end of the inside front side of the pretreatment box 1 is provided with a gas flow sensor 21, and the gas flows into the inside of the pretreatment box 1 from the outside through the air inlet pipe 20. At the same time, the purification mixed solution is added into the inside of the mouth-shaped shunt box 3 through the first liquid inlet pipe 4 by the external liquid feeding device, and the purification mixed solution in the mouth-shaped shunt box 3 is discharged through a plurality of arc-shaped liquid outlet pipes 5. Due to the angle of the arc-shaped liquid outlet pipe 5, the purification mixed solution flows downward along the four side walls in the inside of the pretreatment box 1, so that the purification mixed solution can be maximally mixed and contacted with the flue gas. The external liquid feeding device also adds the purification mixed solution into the inside of the plate-shaped shunt box 15 through the second liquid inlet pipe 14, and the purification mixed solution in the inside of the plate-shaped shunt box 15 is sprayed through a plurality of shower nozzles 16. The flue gas is purified by the purification mixed solution during the upward movement, and the downward moving purification mixed solution is finally discharged through the liquid outlet 17. The upward moving flue gas enters the inside of the special-shaped pipe 6, is slowed down for the first time by the special-shaped pipe 6, then enters the inside of the exhaust pipe 7 to drive the baffle 10 to rotate, and finally is discharged from the exhaust pipe 7.
[0029] Please refer to Figures 1-7 In the embodiment, the top left side of the mouth-shaped shunt box 3 is provided with the first liquid inlet pipe 4, the bottom end of the arc-shaped liquid outlet pipe 5 penetrates the top plate 2 and is located in the inside of the pretreatment box 1, the bottom of the resistance arc plate 13 is attached to the connecting circular block 8, the top center of the top plate 2 is provided with the second liquid inlet pipe 14, and the bottom end of the second liquid inlet pipe 14 penetrates the top plate 2 and is connected with the plate-shaped shunt box 15. When the desulfurization and denitrification operation is performed, the gas flow sensor 21 of the FS4003 type detects the flow rate of the upward flowing flue gas and transmits the detection result to the external PLC control. When the flue gas flow rate is too fast, the air cylinder 12 is started, the air cylinder 12 drives the resistance arc plate 13 to move downward until the resistance arc plate 13 is attached to the connecting circular block 8. The friction force between the resistance arc plate 13 and the connecting circular block 8 slows down the rotation speed of the connecting shaft 9, so that the baffle 10 blocks the flue gas, the flow rate of the flue gas is slowed down, the function of the baffle is realized, and the problem that the flue gas is discharged too fast due to the excessive pressure in the box body, which affects the safety of the exhaust, is prevented.
[0030] In the process of working, the flue gas from the outside enters the inside of the pretreatment box 1 through the air inlet pipe 20, at the same time, the purification mixed solution is added into the inside of the mouth-shaped shunt box 3 through the first liquid inlet pipe 4 by the external liquid feeding device, and the purification mixed solution in the mouth-shaped shunt box 3 is discharged through the arc-shaped liquid discharge pipe 5, due to the angle of the arc-shaped liquid discharge pipe 5, the purification mixed solution flows downward along the four sides of the inside of the pretreatment box 1, so that the purification mixed solution can be maximized to mix and contact with the flue gas, and the external liquid feeding device also adds the purification mixed solution into the inside of the plate-shaped shunt box 15 through the second liquid inlet pipe 14, the purification mixed solution in the inside of the plate-shaped shunt box 15 is sprayed through the shower head 16, the flue gas is purified by the purification mixed solution in the process of moving upward, and the downward moving purification mixed solution is finally discharged through the liquid discharge port 17, the upward moving flue gas enters the inside of the special-shaped pipeline 6, the flue gas is first decelerated by the special-shaped pipeline 6, then the flue gas enters the inside of the exhaust pipeline 7 to drive the resistance plate 10 to rotate, and finally the flue gas is discharged from the exhaust pipeline 7, in the process of desulfurization and denitrification, the flow rate of the upward flowing flue gas is detected by the gas flow sensor 21 of model FS4003, and the detection result is transmitted to the outside PLC control, when the flue gas flow rate is too fast, the air cylinder 12 is started, the air cylinder 12 drives the resistance arc plate 13 to move downward until the resistance arc plate 13 is attached to the connecting circular block 8, the friction force between the resistance arc plate 13 and the connecting circular block 8 slows down the rotation speed of the connecting shaft 9, so that the flue gas is blocked by the resistance plate 10, the flow rate of the flue gas is slowed down, the functions of resistance and improving reaction efficiency are realized.
[0031] Through the above steps, the purified mixed solution is added to the inside of the mouth-shaped shunt box 3 through the first liquid inlet pipe 4 by the external liquid feeding device, and the purified mixed solution in the mouth-shaped shunt box 3 is discharged through a plurality of arc-shaped liquid discharge pipes 5. Due to the angle of the arc-shaped liquid discharge pipe 5, the purified mixed solution flows downward along the four side surfaces inside the pretreatment box 1, so that the purified mixed solution can be maximally mixed and contacted with the flue gas, thereby realizing the function of improving the reaction efficiency. The flow rate of the upward flowing flue gas is detected by the gas flow sensor 21 of model FS4003, and the detection result is transmitted to the external PLC control. When the flue gas flow speed is too fast, the air cylinder 12 is started, the air cylinder 12 pushes the resistance arc plate 13 to move downward, until the resistance arc plate 13 is attached to the connecting circular block 8. The friction between the resistance arc plate 13 and the connecting circular block 8 slows down the rotation speed of the connecting shaft 9, so that the flue gas is blocked by the baffle 10, the flow rate of the flue gas is slowed down, and the function of wind resistance is realized. To solve the common desulfurization and denitrification pretreatment device before flue gas catalytic combustion, only the flue gas purification device can perform desulfurization and denitrification pretreatment on the flue gas, but lacks the functions of wind resistance and reaction efficiency improvement, and cannot guarantee the effect of desulfurization and denitrification and the safety of exhaust gas. The problems of the purified mixed solution being unable to fully contact and react with the flue gas after being sprayed, and the flue gas pressure being too high in the box body to cause the exhaust speed to be too fast, affecting the desulfurization and denitrification effect and the exhaust safety.
Claims
1. A flue gas catalytic combustion desulfurization and denitrification pretreatment device before, comprising a pretreatment box (1); characterized in that: Also include the roof (2), mouth-shaped shunt box (3), arc-shaped drainage pipe (5), special-shaped pipeline (6), exhaust duct (7), connecting round block (8), connecting shaft (9), baffle (10), mounting plate (11), cylinder (12) and resistance arc plate (13), the top of the pretreatment tank (1) is provided with roof (2), the top of roof (2) is provided with mouth-shaped shunt box (3), the bottom of mouth-shaped shunt box (3) is provided with arc-shaped drainage pipe (5) several equal intervals, the top of the left side of pretreatment tank (1) is provided with special-shaped pipeline (6), the bottom of special-shaped pipeline (6) is provided with exhaust duct (7), the front side center of exhaust duct (7) is provided with connecting round block (8), the rear side of connecting round block (8) is provided with connecting shaft (9), connecting shaft (9) penetrates exhaust duct (7) and is rotatably connected with the rear side of its inside, connecting shaft (9) is provided with several baffle (10) equal intervals around the body, the front top of exhaust duct (7) is provided with mounting plate (11), the center of mounting plate (11) top is provided with cylinder (12), the output end of cylinder (12) bottom penetrates mounting plate (11) and is connected with resistance arc plate (13).
2. The flue gas desulfurization and denitrification pretreatment device before catalytic combustion according to claim 1, characterized in that: The top left side of mouth-shaped shunt box (3) is provided with first liquid inlet pipe (4), the bottom end of arc-shaped drainage pipe (5) penetrates roof (2) and is located in the inside of pretreatment tank (1).
3. The device for desulfurization and denitrification pretreatment before flue gas catalytic combustion according to claim 1, characterized in that: The bottom of resistance arc plate (13) is attached to connecting round block (8).
4. The flue gas desulfurization and denitrification pretreatment device before catalytic combustion according to claim 1, characterized in that: The center of roof (2) top is provided with second liquid inlet pipe (14), the bottom end of second liquid inlet pipe (14) penetrates roof (2) and is connected with plate-shaped shunt box (15).
5. The flue gas desulfurization and denitrification pretreatment device before catalytic combustion according to claim 4, characterized in that: The bottom of plate-shaped shunt box (15) is provided with several shower heads (16) equal intervals, the center of the bottom of pretreatment tank (1) is provided with drainage port (17).
6. The flue gas desulfurization and denitrification pretreatment device before catalytic combustion according to claim 1, characterized in that: Four support legs (18) are symmetrically arranged at the bottom of pretreatment tank (1), the bottom end of support leg (18) is provided with self-locking universal pulley (19).
7. The flue gas desulfurization and denitrification pretreatment device before catalytic combustion according to claim 1, characterized in that: The bottom end of the right side of pretreatment tank (1) is provided with air inlet pipe (20).
8. The flue gas desulfurization and denitrification pretreatment device before catalytic combustion according to claim 1, characterized in that: The top end of the inside front side of pretreatment tank (1) is provided with gas flow sensor (21).