Limestone stirring, desulfurizing and demisting device

Abstract

The utility model relates to the technical field of lime desulfurization and discloses a limestone stirring, desulfurizing and demisting device which comprises a box body, a reaction box, an air inlet mechanism and a demisting mechanism, the reaction box is arranged at the inner bottom of the box body, and a constant-temperature wall made of a water circulation heating system is fixed between the reaction box and the box body; pipelines of the water circulation heating system are evenly laid in the constant-temperature wall, exhaust holes are formed in the upper surface of the reaction box, an avoiding hole is formed in the top of the reaction box and located in the left side of the exhaust holes, a horizontally-arranged circular disc is rotationally connected to the upper surface of the reaction box, and a first through hole is formed in the eccentric position of the circular disc; the air inlet mechanism is fixed on the box body and is used for absorbing smoke dust in the air and conveying the smoke dust into the reaction box for desulfurization reaction; and the demisting mechanism is fixedly connected to the outer wall of the box body and is used for demisting and heating the desulfurized gas and then discharging the gas into the air.

Description

Technical Field

[0001] This utility model belongs to the field of lime desulfurization technology, and specifically relates to a limestone stirring desulfurization and demisting device. Background Technology

[0002] The flue gas emitted during limestone mixing contains large amounts of SO2 and SO3. These SO2 and SO3 react with moisture (H2O or water) in the atmosphere to form H2SO3 and H2SO4, resulting in acid rain. This poses a serious threat to humans, other animals and plants, aquatic plants and animals, and buildings. To ensure that emissions meet environmental protection requirements, the emitted flue gas needs to be desulfurized. For example, patent application number "202221741401.9" discloses a flue gas desulfurization system that uses a spray layer and heat dissipation components to desulfurize the flue gas by spraying the reaction liquid. Another example is patent application number "202320641451.8" which discloses a flue gas dust removal and desulfurization heat recovery tower with a first spray layer, a second spray layer, and a demisting layer. The reaction efficiency between the reaction liquid and the flue gas is improved by spraying the reaction liquid twice. Both of the above patents have achieved the effect of desulfurizing flue gas, but neither can control the temperature of the desulfurization reaction. If the temperature is too high, the SO2 equilibrium partial pressure will rise, which is not conducive to gas-liquid mass transfer and will lead to a decrease in desulfurization efficiency. Utility Model Content

[0003] The present invention aims to provide a limestone stirring desulfurization and demisting device to achieve the optimal reaction temperature in the flue gas desulfurization process.

[0004] This solution discloses a limestone-stirred desulfurization and demisting device, comprising a housing, a reaction chamber, an air inlet mechanism, and a demisting mechanism. The reaction chamber is located at the bottom of the housing, and a constant-temperature wall made of a water circulation heating system is fixed between the reaction chamber and the housing. The pipes of the water circulation heating system are evenly laid inside the constant-temperature wall. An exhaust port is provided on the upper surface of the reaction chamber, and an avoidance hole is provided on the top of the reaction chamber, located to the left of the exhaust port. A horizontally arranged circular disk is rotatably connected to the upper surface of the reaction chamber, and a first through hole is provided at the eccentric part of the circular disk. The air inlet mechanism is fixed to the housing and is used to absorb dust in the air and transport it to the reaction chamber for desulfurization reaction. The demisting mechanism is fixedly connected to the outer wall of the housing and is used to demist and heat the gas after desulfurization before discharging it into the air.

[0005] The working principle of this scheme is as follows: Before starting work, the prepared limestone slurry is injected into the reaction chamber. The constant temperature wall is opened, and the water circulation system of the constant temperature wall starts to operate, ensuring that the desulfurization temperature in the reaction chamber is 50-60℃. The hydraulic cylinder is opened to determine the position of the air inlet pipe in the reaction chamber. The hydraulic cylinder is closed, the motor is turned on, and the air inlet fan blades start to rotate. After the flue gas enters the air inlet pipe and reaches the chamber, it enters the reaction chamber through the air inlet pipe. The flue gas enters the reaction chamber and reacts with the limestone slurry to produce calcium sulfate precipitate, water, and carbon dioxide. The generated water dissolves in the slurry, and the generated carbon dioxide is discharged into the chamber through the exhaust port. The carbon dioxide floats to the upper part of the chamber and enters the demister through the ventilation pipe. After being demisted by the demister, it is discharged through the exhaust pipe. After the desulfurization work is completed, the constant temperature wall and the motor are closed.

[0006] The beneficial effects of this scheme are: by setting up a constant temperature wall, the reaction temperature inside the reaction chamber can be kept at the optimal reaction temperature, so that the limestone slurry will not precipitate crystals due to temperature changes.

[0007] Furthermore, a vertical sleeve is fixedly connected inside the reaction chamber. An exhaust port is provided at the upper end of the sleeve's side wall. The reaction chamber and the bottom of the sleeve are fixed together by a support rod. A ring is fitted onto the end of the sleeve furthest from the bottom of the chamber. Two fixing rods are fixedly connected to the other end of the ring. Each fixing rod has a buckle fixedly connected to its middle, and a filter bag is clamped within the buckle. The filter bag is located inside the sleeve. The exhaust port on the upper surface of the reaction chamber is located at the end opposite to the exhaust port. In use, flue gas is transported to the bottom of the sleeve through the second air inlet pipe. A ventilation space is created between the sleeve and the reaction chamber, allowing the generated carbon dioxide to be smoothly discharged into the chamber. The carbon dioxide produced by the reaction is discharged through the exhaust port and reaches the exhaust port position, then is discharged into the chamber.

[0008] Furthermore, the air intake mechanism includes an air intake pipe, a motor, and a hydraulic cylinder. The air intake pipe is divided into a first air intake pipe and a second air intake pipe. A second through hole is provided on the top of the outer casing. A hydraulic cylinder and a motor are fixedly connected next to the second through hole. The first air intake pipe is connected to the hydraulic cylinder. The bottom end of the first air intake pipe passes through the second through hole and is located inside the casing. One end of the first air intake pipe inside the casing is connected to a horizontal pipe. The air inlet of the first air intake pipe is vertically fixedly connected to the motor, and the motor is fixedly connected to a fan blade. The top end of the bent second air intake pipe vertically upward passes through the horizontal pipe. The second air intake pipe is connected to the first air intake pipe. The bottom end of the second air intake pipe passes through the first through hole and extends to the bottom of the reaction chamber. In use, turning on the motor causes the fan to start rotating, and the flue gas is drawn into the first ventilation pipe and transported to the reaction chamber through the second ventilation pipe.

[0009] Furthermore, the defogging mechanism includes a ventilation duct, a defogging chamber, and an exhaust pipe. The defogging chamber is fixedly connected to the upper outer wall of the chamber body. Water-absorbing cotton is installed at the bottom of the defogging chamber, and the bottom of the defogging chamber is connected to the ventilation duct. The end of the ventilation duct away from the defogging chamber is connected to the interior of the chamber body. An exhaust pipe is connected to the top of the defogging chamber, and water-absorbing cotton is installed at the connection between the exhaust pipe and the defogging chamber. In use, carbon dioxide inside the chamber enters the defogging chamber through the ventilation duct, undergoes initial dehydration by the water-absorbing cotton at the bottom of the defogging chamber, and is then discharged into the air after a second dehydration by the water-absorbing cotton at the connection between the exhaust pipe and the defogging chamber when the carbon dioxide is transported to the exhaust pipe.

[0010] Furthermore, a rotary motor with a vertically downward-pointing output shaft is fixedly connected near the horizontal tube. The top of a bent second air intake pipe passes vertically upward through the horizontal tube and is fixedly connected to the output shaft of the rotary motor. The second air intake pipe is rotatably connected to the horizontal tube. The rotary motor drives the second air intake pipe to rotate, causing it to rotate and stir the limestone slurry within the reaction chamber, preventing sediment and dust impurities from clogging the ventilation pipe and hindering the reaction.

[0011] Furthermore, a cam is fixedly connected to the middle of the second intake pipe. The central axis of the cam is coaxial with the central axis of the second intake pipe. A "┒"-shaped fixing rod is fixedly connected to the eccentric part of the cam. The bottom end of the fixing rod extends through the clearance hole into the reaction chamber. A horizontally set cover plate is fixedly connected to the fixing rod. The cover plate slides in contact with the upper surface of the reaction chamber and is located directly above the clearance hole. The size of the cover plate is larger than the size of the clearance hole. Multiple horizontally set extrusion rods are fixedly connected to the bottom of the fixing rod. The right end of the extrusion rod abuts against the side wall of the sleeve. Through the setting of the cam and extrusion rods, the fixed rod drives the extrusion rods to squeeze the filter belt during the reciprocating motion, causing the precipitates and dust impurities adsorbed on the filter bag wall to fall off, making the agitation more thorough, and further enhancing the reaction between the limestone slurry and the flue gas.

[0012] Furthermore, a heating rod is installed at the central axis position inside the demister box, and a temperature regulator is provided on the outer wall of the demister box. The temperature regulator is electrically connected to the heating rod. By setting up the heating rod, the temperature of the passing carbon dioxide and water-absorbing cotton is kept above the dew point temperature, preventing the gas from escaping and lowering the air temperature to form condensate. The condensate then reacts with acidic gases in the flue gas to form sulfuric acid, which corrodes the exhaust pipe.

[0013] Furthermore, the outer wall of the chamber is equipped with a movable door, which has a handle and a temperature controller. The temperature controller is electrically connected to the heating device of the water circulation heating system. The temperature controller allows for real-time monitoring of the reaction temperature inside the chamber, facilitating timely temperature adjustments. The movable door allows for the removal of filter bags inside the chamber, making it convenient to clean the precipitates from the desulfurization reaction.

[0014] Furthermore, multiple support legs are connected to the bottom of the outer casing. These support legs allow the air intake duct to collect smoke and dust from higher areas, making the device easier for workers to operate at. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of Example 1 of the desulfurization and demisting device for cement production according to this utility model;

[0016] Figure 2 This is an external view of Example 1 of the desulfurization and demisting device for cement production according to this utility model;

[0017] Figure 3 This is a schematic diagram of the reaction chamber in Example 1 of the desulfurization and demisting device for cement production of this utility model;

[0018] Figure 4 This is a top view of the first air inlet pipe in Example 1 of the desulfurization and demisting device for cement production of this utility model;

[0019] Figure 5 for Figure 1 Top view of the middle ring;

[0020] Figure 6 for Figure 1 Front view of the middle ring, fixing rod, and buckle. Detailed Implementation

[0021] The following detailed description illustrates the specific implementation method:

[0022] The reference numerals in the accompanying drawings include: intake pipe 1, first intake pipe 101, second intake pipe 102, hydraulic cylinder 2, demister box 3, heating rod 301, absorbent cotton 302, ventilation pipe 303, exhaust pipe 4, rotary motor 5, cam 6, circular disc 7, ring 8, fixing rod 9, buckle 10, filter bag 11, constant temperature wall 12, extrusion rod 13, sleeve 14, cover plate 15, temperature regulator 16, handle 17, temperature controller 18, support leg 19, fan blade 20, air outlet 21, exhaust port 22.

[0023] Example 1 is basically as follows Figure 1-6The image shows a limestone stirring desulfurization and demisting device, comprising a housing, a reaction chamber, an air inlet mechanism, and a demisting mechanism. The reaction chamber is located at the bottom of the housing. A constant temperature wall 12 made of a water circulation heating system is fixed between the reaction chamber and the housing. The water circulation heating system uses a pipeline-type steam-water mixing heater (manufacturer: Siemens Electromechanical, model: SEMEM_HQS steam-water mixer) to heat the water, thereby achieving process heat preservation or circulating heating of the process water. The pipes of the water circulation heating system are evenly laid inside the constant temperature wall 12. A vertical sleeve 14 is fixedly connected inside the reaction chamber 15. The upper end of the side wall of the sleeve 14... The reaction chamber is provided with an air vent 21. The bottom of the reaction chamber and the sleeve 14 are fixed together by a support rod. A ring 8 is fitted onto the top of the sleeve 14. Two fixing rods 9 are fixedly connected to the lower end of the ring 8. Each fixing rod 9 is fixedly connected to a buckle 10 in the middle. A filter bag 11 is clamped in the buckle 10. The filter bag 11 is located inside the sleeve 14. An exhaust port 22 is provided on the upper surface of the reaction chamber. The exhaust port 22 is located at the end opposite to the air vent 21. An clearance hole is provided on the top of the reaction chamber. The clearance hole is located to the left of the exhaust port 22. A horizontally arranged circular disk 7 is rotatably connected to the upper surface of the reaction chamber. A first through hole is provided at the eccentric part of the circular disk 7.

[0024] The air intake mechanism includes an air intake pipe 1, a motor, and a hydraulic cylinder 2. The air intake pipe 1 is divided into a first air intake pipe 101 and a second air intake pipe 102. A second through hole is provided on the top of the outer casing, and a hydraulic cylinder 2 is fixedly connected next to the second through hole. The first air intake pipe 101 is fixed on the output shaft of the hydraulic cylinder 2. The bottom end of the first air intake pipe passes through the second through hole and is located inside the casing. One end of the first air intake pipe inside the casing is connected to a horizontal pipe. The air inlet of the first air intake pipe 101 is vertically fixedly connected to a motor, and a fan blade 20 is fixedly connected to the output shaft of the motor. A rotary motor 5 with its output shaft pointing vertically downwards is fixedly connected to the top of the horizontal pipe. The top of the bent second air intake pipe 102 passes vertically upwards through the horizontal pipe and is fixedly connected to the output shaft of the rotary motor 5. The second air intake pipe 102 and the horizontal pipe... The second intake pipe 102 is connected to the first intake pipe 101 by a rotatable connection. The bottom end of the second intake pipe 102 extends through the first through hole to the bottom of the reaction chamber. A cam is fixedly connected to the middle of the second intake pipe 102. The central axis of the cam is coaxial with the central axis of the second intake pipe 102. A "┒"-shaped fixing rod 9 is fixedly connected to the eccentric part of the cam. The bottom end of the fixing rod 9 extends through the clearance hole into the reaction chamber. A horizontally arranged cover plate 15 is fixedly connected to the fixing rod 9. The cover plate 15 slides in contact with the upper surface of the reaction chamber and is located directly above the clearance hole. The size of the cover plate 15 is larger than the size of the clearance hole. A plurality of horizontally arranged extrusion rods 13 are fixedly connected to the bottom of the fixing rod 9. The right end of the extrusion rod 13 abuts against the side wall of the sleeve 14.

[0025] The defogging mechanism includes a ventilation duct 303, a defogging box 3, and an exhaust pipe 4. The defogging box 3 is fixedly connected to the upper part of the outer wall of the box body. A water-absorbing cotton 302 is installed at the bottom of the defogging box 3. The bottom of the defogging box 3 is connected to the ventilation duct 303. The left end of the ventilation duct 303 is connected to the inside of the box body. A heating rod 301 is installed at the central axis position inside the defogging box 3. The top of the defogging box 3 is connected to the exhaust pipe 4. A water-absorbing cotton 302 is installed at the connection between the exhaust pipe 4 and the defogging box 3. A temperature regulator 16 is provided on the outer wall of the defogging box 3. The temperature regulator 16 is electrically connected to the heating rod 301.

[0026] The outer wall of the enclosure is equipped with a movable door, which has a handle 17 and a temperature controller 18. The temperature controller 18 is electrically connected to the heating device of the water circulation heating system. Multiple support legs 19 are connected to the bottom of the enclosure.

[0027] The specific implementation process is as follows: Before starting work, open the movable door and take out the reaction box. Install the ring 8 on the sleeve 14. Fix the filter bag 11 on the fixed rod 9 with the buckle 10. Inject the prepared limestone slurry into the filter bag 11 in the reaction box. Install the reaction box back into the box body. Close the movable door. Turn on the temperature controller 18. The water circulation heating system of the constant temperature wall 12 starts to work. Set the temperature of the temperature controller to about 55℃ to ensure that the desulfurization temperature in the reaction box is the optimal temperature of 50-60℃. Turn on the hydraulic cylinder 2 to determine the position of the air inlet pipe 1 in the reaction box. Because the fixed rod 9 extends into the reaction box through the clearance hole, the cover plate 15 is slidably connected to the upper surface of the reaction box. Turn off the hydraulic cylinder 2. Turn on the rotary motor 5. The second air inlet pipe 102 starts to rotate, driving the circular disk 7 and cam 6 to rotate. Cam 6 drives the fixed rod 9 to extend and retract, so that the pressing rod 13 on the same side of the fixed rod 9 presses the filter belt. Turn on the motor. The air inlet fan blade 20 starts to rotate. The flue gas enters the first air inlet pipe 101 and passes through the second air inlet pipe. The gas is fed into the reaction chamber via channel 102, where it reacts with limestone slurry to produce calcium sulfate precipitate, water, and carbon dioxide. The water dissolves in the slurry, while the carbon dioxide is transported through the vent 21 at the top of sleeve 14 to the vent 22 on the upper surface of the reaction chamber. It then exits through the through-hole into the chamber. The temperature regulator 16 is turned on, and the heating rod 301 starts working, controlling the temperature above the dew point of water. The carbon dioxide floats into the upper part of the chamber and enters the demister through the ventilation duct 303. After the water-absorbing cotton 302 removes the moisture attached to the carbon dioxide, it is dried again by the heating rod 301. After the water-absorbing cotton 302 in the exhaust pipe 4 absorbs the moisture from the carbon dioxide again, it is discharged from the chamber. After the desulfurization process is completed, the rotary motor 5 is turned off, the hydraulic cylinder 2 is turned on, and the second air inlet pipe 102 and the fixing rod 9 leave the reaction chamber. The hydraulic cylinder 2 is then turned off, the movable door is opened, and the reaction chamber is removed. The filter bag 11 is removed from the fixing device. The generated calcium sulfate and dust impurities remain in the filter bag 11. After cleaning the filter bag 11, it can be reinstalled for repeated use.

[0028] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A limestone stirring desulfurization and demisting device, characterized in that: The system includes a housing, a reaction chamber, an air inlet mechanism, and a demisting mechanism. The reaction chamber is located at the bottom of the housing. A constant-temperature wall made of a water circulation heating system is fixed between the reaction chamber and the housing. The pipes of the water circulation heating system are evenly laid inside the constant-temperature wall. An exhaust port is provided on the upper surface of the reaction chamber, and an avoidance hole is provided on the top of the reaction chamber, located to the left of the exhaust port. A horizontally arranged circular disk is rotatably connected to the upper surface of the reaction chamber, and a first through hole is provided at the eccentric part of the circular disk. The air inlet mechanism is fixed to the housing and is used to absorb the dust in the air and transport it into the reaction chamber for desulfurization reaction. The demisting mechanism is fixedly connected to the outer wall of the housing and is used to demist and heat the gas after desulfurization before discharging it into the air.

2. The limestone stirring desulfurization and demisting device according to claim 1, characterized in that: A vertical sleeve is fixedly connected inside the reaction chamber. The upper end of the side wall of the sleeve is provided with an air vent. The reaction chamber and the bottom of the sleeve are fixed together by a support rod. A ring is fitted onto one end of the sleeve away from the bottom of the chamber. Two fixing rods are fixedly connected to the other end of the ring. Each fixing rod is fixedly connected to a buckle in the middle. A filter bag is clamped in the buckle and is located inside the sleeve. The exhaust port on the upper surface of the reaction chamber is located at the end opposite to the air vent.

3. The limestone stirring desulfurization and demisting device according to claim 2, characterized in that: The air intake mechanism includes an air intake pipe, a motor, and a hydraulic cylinder. The air intake pipe is divided into a first air intake pipe and a second air intake pipe. A second through hole is provided on the top of the outer casing. A hydraulic cylinder and a motor are fixedly connected next to the second through hole. The first air intake pipe is connected to the hydraulic cylinder. The bottom end of the first air intake pipe passes through the second through hole and is located inside the casing. One end of the first air intake pipe inside the casing is connected to a horizontal pipe. The air inlet of the first air intake pipe is vertically fixedly connected to the motor. The motor is fixedly connected to a fan blade. The top end of the bent second air intake pipe passes vertically upward through the horizontal pipe. The second air intake pipe is connected to the first air intake pipe. The bottom end of the second air intake pipe passes through the first through hole and extends to the bottom of the reaction chamber.

4. The limestone stirring desulfurization and demisting device according to claim 3, characterized in that: The defogging mechanism includes a ventilation duct, a defogging box, and an exhaust pipe. The defogging box is fixedly connected to the upper part of the outer wall of the box body. Water-absorbing cotton is installed at the bottom of the defogging box. The bottom of the defogging box is connected to the ventilation duct. The end of the ventilation duct away from the defogging box is connected to the inside of the box body. An exhaust pipe is connected to the top of the defogging box. Water-absorbing cotton is installed at the connection between the exhaust pipe and the defogging box.

5. The limestone stirring desulfurization and demisting device according to claim 4, characterized in that: The horizontal tube is fixedly connected to a rotary motor with its output shaft pointing vertically downwards. The top of the bent second air intake pipe passes vertically upwards through the horizontal tube and is fixedly connected to the output shaft of the rotary motor. The second air intake pipe is rotatably connected to the horizontal tube.

6. The limestone stirring desulfurization and demisting device according to claim 5, characterized in that: A cam is fixedly connected to the middle of the second air intake pipe. The central axis of the cam is coaxial with the central axis of the second air intake pipe. A "┒"-shaped fixing rod is fixedly connected to the eccentric part of the cam. The bottom end of the fixing rod extends through the clearance hole into the reaction chamber. A horizontally set cover plate is fixedly connected to the fixing rod. The cover plate slides in contact with the upper surface of the reaction chamber and is located directly above the clearance hole. The size of the cover plate is larger than the size of the clearance hole. Multiple horizontally set extrusion rods are fixedly connected to the bottom of the fixing rod. The right end of the extrusion rod abuts against the side wall of the sleeve.

7. The limestone stirring desulfurization and demisting device according to claim 6, characterized in that: A heating rod is installed at the central axis position inside the demisting box, and a temperature regulator is provided on the outer wall of the demisting box. The temperature regulator is electrically connected to the heating rod.

8. The limestone stirring desulfurization and demisting device according to claim 7, characterized in that: The outer wall of the box is equipped with a movable door, which has a handle and a temperature controller. The temperature controller is electrically connected to the heating device of the water circulation heating system.

9. The limestone stirring desulfurization and demisting device according to claim 8, characterized in that: The bottom of the box is connected to multiple support legs.

Images