CN115945045B - Device for capturing carbon dioxide in flue of coal-fired power plant and application method of device - Google Patents

Abstract

The invention relates to a carbon dioxide capturing device, in particular to a device for capturing carbon dioxide in a flue of a coal-fired power plant and a using method thereof. The invention provides a device for capturing carbon dioxide in a flue of a coal-fired power plant, which can fully contact alkaline solution with flue gas of the coal-fired power plant so as to fully capture carbon dioxide and reduce waste of the alkaline solution, and a use method thereof. A device for capturing carbon dioxide in a flue of a coal-fired power plant and a use method thereof comprise a base frame, a flue discharge frame body, an air inlet pipeline, an alkaline solution spraying mechanism and the like; the flue discharge frame body is fixedly connected to the base frame, an air inlet pipeline is communicated with the flue discharge frame body, and the alkaline solution spraying mechanism is arranged on the base frame. The alkaline solution is uniformly sprayed by the spherical spray heads, so that the alkaline solution can fully absorb carbon dioxide gas in the flue gas, more carbon dioxide gas can be trapped, and other gases in the flue gas can be discharged from the discharge port of the flue gas discharge frame body.

Description

Device for capturing carbon dioxide in flue of coal-fired power plant and application method of device

Technical Field

The invention relates to a carbon dioxide capturing device, in particular to a device for capturing carbon dioxide in a flue of a coal-fired power plant and a using method thereof.

Background

With global warming, measures for reducing carbon dioxide are not slow, and flue gas of coal-fired power plants is taken as a main source of carbon dioxide, so that carbon dioxide is more necessarily captured and extracted, and further, effective emission reduction of carbon dioxide is performed. The carbon dioxide can be captured by the reaction of the alkaline solution and the flue gas of the coal-fired power plant, the chemical reaction of the alkaline solution and the carbon dioxide in the flue gas can generate calcium carbonate particles, and then the calcium carbonate particles are heated at high temperature to generate high-purity carbon dioxide, so that the carbon dioxide is extracted.

The existing carbon dioxide capturing device has the problems that the contact of the alkaline solution and the flue gas of the coal-fired power plant is insufficient and the contact time is too short, so that the reaction of the alkaline solution and the carbon dioxide is insufficient, the capturing efficiency of the carbon dioxide is low, the alkaline solution is always sprayed, the waste problem is also caused, the utilization rate of the alkaline solution is low, and the capturing cost is high.

Therefore, there is a need to develop a device for capturing carbon dioxide in the flue of a coal-fired power plant and a method for using the same, which can fully contact alkaline solution with flue gas of the coal-fired power plant to fully capture carbon dioxide and reduce waste of alkaline solution.

Disclosure of Invention

The invention provides a device for capturing carbon dioxide in a flue of a coal-fired power plant and a use method thereof, which can fully contact alkaline solution with flue gas of the coal-fired power plant so as to fully capture carbon dioxide and reduce waste of the alkaline solution.

The utility model provides a coal fired power plant flue entrapment carbon dioxide device and application method thereof, includes base frame, flue emission framework, admission line, alkaline solution spraying mechanism and spray amount control mechanism, be equipped with an inclined plane filter and a take mouthful baffle in the base frame, flue emission framework fixed connection is on the base frame, the flue emission framework top is opened there is a discharge port, flue emission framework lower part is opened there is an export, the bottom of flue emission framework is equipped with the inclined plane, flue emission framework and base frame intercommunication, admission line connects on the flue emission framework and communicates with the flue emission framework, alkaline solution spraying mechanism establishes on the base frame and is connected with the flue emission framework, spray amount control mechanism establishes on alkaline solution spraying mechanism and is connected with the flue emission framework.

Further stated, the alkaline solution spraying mechanism comprises a booster pump, a conveying pipe, a shunt pipe, a fixing frame, a spraying pipe and a spherical spray head, wherein the booster pump is fixedly connected to the bottom of the inner side of a base frame, the lower end of the conveying pipe is connected to the booster pump and communicated with the booster pump, the shunt pipe is connected to the upper end of the conveying pipe and communicated with the conveying pipe, the fixing frame is fixedly connected to the upper portion of the inner side of a flue discharge frame, three spraying pipes are communicated to the shunt pipe, the spraying pipes penetrate through the flue discharge frame, the spraying pipes are fixedly connected with the fixing frame, a plurality of spherical spray heads are communicated to the bottom of the spraying pipes, the spherical spray heads are all positioned in the flue discharge frame, and a plurality of small holes are formed in the spherical spray heads.

Further stated, the spraying amount control mechanism comprises a rotating shaft, fan blades, a rotating pushing groove plate, a first tension spring, a sliding magnetic block, a blocking cylinder, a first magnet rod, a fixed cam and a closing frame, wherein the rotating shaft is rotatably connected to the flue discharging frame body, the rotating shaft and the air inlet pipeline are positioned on the same horizontal line, the fan blades are fixedly connected to one end, close to the air inlet pipeline, of the rotating shaft, the fan blades are positioned in the air inlet pipeline, the rotating pushing groove plate is fixedly connected to one end, far away from the fan blades, of the rotating shaft, a sliding groove is formed in the rotating pushing groove plate, the sliding magnetic block is slidably connected to the sliding groove of the rotating pushing groove plate, the first tension spring is connected between the rotating pushing groove plate and the sliding magnetic block, the blocking cylinder is slidably connected to the conveying pipe, the magnet rod is fixedly connected to one end, located outside the conveying pipe, the fixed cam is fixedly connected to one side, close to the rotating shaft, close to the rotating pushing groove plate, the fixed cam is positioned between the flue discharging frame body and the rotating pushing groove plate, the base frame and the flue discharging frame body are slidably connected to the closing frame, and the upper end of the closing frame is in contact with the fixed cam.

The flue gas treatment device is characterized by further comprising a swinging mechanism, wherein the swinging mechanism is arranged on the flue gas discharge frame body and comprises a fixed groove plate, a sliding L-shaped groove plate, a second tension spring, a movable swinging rod and a fixed grid strip, the fixed groove plate is fixedly connected to one side, close to a conveying pipe, of the upper portion of the flue gas discharge frame body, the fixed groove plate is positioned below the split pipe, the sliding L-shaped groove plate is slidably connected to the fixed groove plate, a plurality of short grooves are formed in the sliding L-shaped groove plate, a second tension spring is connected between the fixed groove plate and the sliding L-shaped groove plate, the upper portion of the flue gas discharge frame body is rotatably connected with a plurality of movable swinging rods, the movable swinging rods are positioned below the spray pipe, the movable swinging rods are slidably connected with the short grooves on the sliding L-shaped groove plate, the fixed grid strip is fixedly connected to the movable swinging rods, the fixed grid strip is positioned in the flue gas discharge frame body, and every two fixed grid strips are in a staggered arrangement.

The intermittent opening and closing mechanism is arranged on the conveying pipe, the intermittent opening and closing mechanism comprises a fixed rack, a ball valve and a rotary gear, the fixed rack is fixedly connected to the top of the sliding L-shaped groove plate, the ball valve is rotatably connected to the upper portion of the inner side of the conveying pipe, the rotary gear is fixedly connected to one end of the ball valve, which is located outside the conveying pipe, and the rotary gear is located above the fixed rack, and the fixed rack is meshed with the rotary gear.

Further, the magnetic iron rod is characterized by further comprising spring shifting sheets, wherein two spring shifting sheets are fixedly connected to one side, close to the magnetic iron rod, of the conveying pipe, the two spring shifting sheets are symmetrically arranged, the blocking cylinder is located between the two spring shifting sheets, and the blocking cylinder is in contact with the spring shifting sheets.

Further, the electromagnetic valve extracting pipe is connected to the top of the base frame and is communicated with the base frame.

Further description, the method comprises the following working steps:

step one: when carbon dioxide trapping is needed, the flue gas subjected to desulfurization, denitrification and dust removal is led into an air inlet pipeline;

step two: the booster pump starts to work, alkaline solution is pumped into the spray pipe to spray through the spherical spray head, and the alkaline solution absorbs carbon dioxide and becomes a mixture of calcium carbonate particles and water;

step three: meanwhile, when the smoke passes through the air inlet pipeline, the smoke can drive the fan blades to rotate, and the magnet rod and the blocking cylinder can stably move left and right under the action of the spring poking piece to control the pumping quantity of the alkaline solution, so that the waste of the alkaline solution is reduced;

step four: when the smoke drives the rotating shaft and the rotary pushing groove plate to rotate, the sliding L-shaped groove plate is pushed to move, and the movable rod and the fixed grid strips swing for a certain angle to fold up, so that the speed of floating the smoke is slowed down, and the alkaline solution can react with carbon dioxide in the smoke more fully;

step five: when the sliding L-shaped groove plate moves reciprocally, the fixed rack is driven to move reciprocally, the ball valve can close and connect the conveying pipe, and the purpose of reducing waste of alkaline solution by intermittent spraying is achieved;

step six: when the smoke drives the rotating shaft and the rotary pushing groove plate to rotate, the fixed cam is driven to rotate, and the closing frame is pushed to lift and open;

step seven: when the flue gas is sprayed for a certain time, calcium carbonate particles are accumulated at the bottom of the base frame, and the rest alkaline solution reaches a certain height and can flow to the booster pump;

step eight: when the flue gas is no longer subjected to carbon dioxide capture, the accumulated calcium carbonate particles are heated to 900 degrees by natural gas, high purity carbon dioxide gas is extracted, and then collected and compressed.

The beneficial effects of the invention are as follows:

1. the staff lets in the admission line through the flue gas of SOx/NOx control dust removal, then starts the booster pump, and the booster pump operation can be with the alkaline solution extraction in the base frame to the conveyer pipe in, and then spray out by a plurality of spherical shower nozzle on the shower, a plurality of spherical shower nozzle sprays simultaneously and can let alkaline solution spray more even to let alkaline solution can fully absorb the carbon dioxide gas in the flue gas, so that can more carbon dioxide gas of entrapment, other gases in the flue gas can be discharged from the discharge port of flue emission framework.

2. The flue gas of SOx/NOx control dust removal can drive the flabellum and rotate when getting into air intake duct, and then drive fixed cam and rotate, fixed cam rotates and can extrude closed frame and upwards move, and closed frame upwards moves and will not block up the export of flue emission framework any more, and the mixture of calcium carbonate granule, water and unnecessary alkaline solution of piling up in flue emission framework bottom can fall to the base frame from the export in, and the inclined plane filter in the base frame can filter out the calcium carbonate granule, and unnecessary alkaline solution can flow to booster pump department from the area mouth baffle of base frame to realize alkaline solution's cyclic utilization, reduce alkaline solution's waste, and then make full use of alkaline solution entrapment carbon dioxide gas.

3. The fan blades rotate to drive the rotating shaft to rotate, so that the rotating pushing groove plate is driven to rotate, the sliding magnetic block moves in a direction away from the rotating shaft under the action of centrifugation, the sliding magnetic block can adsorb the magnet rod to move under the action of magnetic force, the blocking cylinder is driven to move, the blocking cylinder moves to increase the flow of alkaline solution in the air inlet pipeline, so that the spraying amount of the alkaline solution is increased, and more carbon dioxide gas is trapped; the higher the exhaust gas flowing speed is, the higher the rotating speed of the fan blades is, and the higher the centrifugal force of the sliding magnetic block is, so that the blocking cylinder can increase the flow of alkaline solution in the air inlet pipeline, and conversely, the lower the centrifugal force of the sliding magnetic block is, so that the blocking cylinder can reduce the flow of alkaline solution in the air inlet pipeline, the spraying amount of alkaline solution is controlled, the spraying amount of alkaline solution is in direct proportion to the exhaust gas flowing speed, and more carbon dioxide gas can be trapped in time.

4. The rotary pushing groove plate rotates to press the sliding L-shaped groove plate to move in a direction away from the rotating shaft, so that a plurality of movable swinging rods are driven to swing upwards, the movable swinging rods can drive the fixed grid strips to swing upwards, the upward swing of the fixed grid strips can slow down the upward floating speed of the flue gas, and the alkaline solution has enough time to react with carbon dioxide gas in the flue gas; the fixed grid strips swing up and down and simultaneously fan the introduced flue gas, the flue gas is uniformly paved in the flue discharge frame body, and then carbon dioxide gas can be uniformly contacted with alkaline solution, so that the carbon dioxide gas and the alkaline solution react more thoroughly.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the present invention.

Fig. 3 is a schematic perspective view, partially in section, of a first type of alkaline solution spraying mechanism of the present invention.

Fig. 4 is a schematic cross-sectional perspective view of the base frame of the present invention.

Fig. 5 is a schematic view of a partially cut-away perspective structure of the spray quantity control mechanism of the present invention.

Fig. 6 is an enlarged perspective view of the present invention a.

Fig. 7 is a schematic view of a second partially cut-away perspective view of the alkaline solution spraying mechanism of the present invention.

Fig. 8 is an enlarged perspective view of the present invention B.

Fig. 9 is a schematic view of a partially cut-away perspective structure of the spray amount control mechanism of the present invention.

Fig. 10 is a schematic view of a first cross-sectional perspective of the swing mechanism of the present invention.

Fig. 11 is a schematic perspective view of a sliding L-shaped channel plate according to the present invention.

Fig. 12 is a schematic view showing a separated three-dimensional structure of the movable swing rod and the fixed grid strip of the present invention.

Fig. 13 is a second cross-sectional perspective view of the swing mechanism of the present invention.

Fig. 14 is an enlarged perspective view of the present invention C.

Fig. 15 is a partially separated perspective view of the intermittent opening and closing mechanism of the present invention.

Fig. 16 is a schematic perspective view of a flue discharge frame according to the present invention.

Fig. 17 is a schematic of the workflow of the present invention.

The reference symbols in the drawings: 1: base frame, 2: flue discharges framework, 3: air inlet pipeline, 4: alkaline solution spraying mechanism, 41: booster pump, 42: delivery tube, 43: shunt tube, 44: fixing frame, 45: shower pipe, 46: spherical nozzle, 5: spray amount control mechanism, 51: rotation shaft, 52: fan blade, 53: rotation pushes the fluted plate, 54: tension spring one, 55: sliding magnet, 56: blocking cylinder, 57: magnet rod 581: fixed cam, 582: closing frame, 6: swing mechanism, 61: fixed slot plate, 62: sliding L-shaped slotted plate, 63: tension spring two, 64: movable swing rod, 65: fixing the grid bars, 7: intermittent opening and closing mechanism, 71: fixed rack, 72: ball valve, 73: rotating gear, 8: spring plectrum, 11: an electromagnetic valve extraction tube.

Detailed Description

In order to make the object technical scheme and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Example 1

The utility model provides a coal fired power plant flue entrapment carbon dioxide device and application method thereof, as shown in fig. 1-17, including base frame 1, flue emission framework 2, admission line 3, alkaline solution spraying mechanism 4 and spray volume control mechanism 5, be equipped with an inclined plane filter and a take mouthful baffle in the base frame 1, inclined plane filter in the base frame 1 is used for filtering solid particles, flue emission framework 2 welds on base frame 1, flue emission framework 2 is vertical setting, flue emission framework 2 top is opened and is had a discharge port, flue emission framework 2's discharge port is arranged in the exhaust gas of exhaust gas, flue emission framework 2 lower part is opened and is had an export, flue emission framework 2 is used for discharging the product and the alkaline solution of alkaline solution chemical action production, the bottom of flue emission framework 2 is equipped with the inclined plane, flue emission framework 2 and base frame 1 intercommunication, admission line 3 connects on flue emission framework 2 and communicates with emission framework 2, the pipeline 3 is used for letting carbon dioxide to take place in the alkaline solution spraying mechanism 4 and spray volume control mechanism 5 and alkaline solution take place in the alkaline solution and spray volume control mechanism 4 is connected to alkaline solution and alkaline solution is most in the alkaline solution spraying mechanism 4.

The alkaline solution spraying mechanism 4 comprises a booster pump 41, a conveying pipe 42, a shunt pipe 43, a fixing frame 44, a spraying pipe 45 and a spherical spray nozzle 46, wherein the booster pump 41 is connected to the bottom of the inner side of the base frame 1 through bolts, the lower end of the conveying pipe 42 is connected to the booster pump 41 and is communicated with the booster pump 41, the conveying pipe 42 is vertically arranged, the shunt pipe 43 is connected to the upper end of the conveying pipe 42 and is communicated with the conveying pipe 42, the shunt pipe 43 is horizontally arranged, the fixing frame 44 is welded on the upper portion of the inner side of the flue discharge frame 2, the fixing frame 44 is horizontally arranged, three spraying pipes 45 are communicated to the shunt pipe 43, the spraying pipe 45 penetrates through the flue discharge frame 2, the spraying pipe 45 is horizontally arranged, the spraying pipe 45 is fixedly connected with the fixing frame 44, a plurality of spherical spray nozzles 46 are communicated to the bottom of the spraying pipe 45, the spherical spray nozzles 46 are used for spraying alkaline solution, the spherical spray nozzles 46 are all located in the flue discharge frame 2, and a plurality of small holes are formed in the spherical spray nozzles 46.

The spraying amount control mechanism 5 comprises a rotating shaft 51, fan blades 52, a rotary pushing groove plate 53, a tension spring I54, a sliding magnetic block 55, a blocking cylinder 56, a magnet rod 57, a fixed cam 581 and a closing frame 582, wherein the rotating shaft 51 is rotatably connected to a flue discharging frame 2, the rotating shaft 51 is horizontally arranged, the rotating shaft 51 and an air inlet pipeline 3 are positioned on the same horizontal line, the fan blades 52 are arranged at one end, close to the air inlet pipeline 3, of the rotating shaft 51, the fan blades 52 are positioned in the air inlet pipeline 3, the rotary pushing groove plate 53 is arranged at one end, far away from the fan blades 52, the rotary pushing groove plate 53 is in a fan-shaped structure, a sliding groove is formed in the rotary pushing groove plate 53, the sliding magnetic block 55 is slidably connected to the sliding groove plate 53, the tension spring I54 is connected between the rotary pushing groove plate 53 and the sliding magnetic block 55 through a hook, the blocking cylinder 56 is slidably connected to the conveying pipe 42, the blocking cylinder 56 is used for controlling alkaline solution flow in the conveying pipe 42, the magnet rod 57 is fixedly connected to one end, close to the fan-shaped cam 582 is positioned on one side, close to the flue 2, close to the fan-shaped cam 582 is fixedly connected to the rotating frame 581, and is positioned between the rotary pushing groove plate 53 and the fan-shaped frame 582, and the rotary pushing frame 582 is fixedly connected to one side, and the rotary frame 581 is fixedly arranged between the rotary pushing frame 582 and the rotary pushing frame 582.

In actual operation, a worker introduces flue gas subjected to desulfurization, denitrification and dust removal into the air inlet pipeline 3, then starts the booster pump 41, the booster pump 41 operates to extract the alkaline solution in the base frame 1 into the conveying pipe 42, the conveying pipe 42 shunts the alkaline solution into the three shunt pipes 43, the alkaline solution in the shunt pipes 43 passes through the spray pipe 45 and is sprayed out by the plurality of spherical spray heads 46 on the spray pipe 45, and the plurality of spherical spray heads 46 can spray the alkaline solution more uniformly, so that the alkaline solution can fully absorb carbon dioxide gas in the flue gas, more carbon dioxide gas can be trapped, other gases in the flue gas can be discharged from the discharge port of the flue gas discharge frame 2, the alkaline solution and carbon dioxide gas react to generate a mixture of calcium carbonate particles and water, the mixture of the calcium carbonate particles, the water and the redundant alkaline solution are accumulated at the bottom of the flue emission frame 2, the flue gas of desulfurization, denitrification and dust removal drives the fan blades 52 to rotate when entering the air inlet pipeline 3, the fan blades 52 rotate to drive the rotating shaft 51 to rotate, the rotating shaft 51 rotates to drive the rotating push groove plate 53 and the fixed cam 581 to rotate, the fixed cam 581 rotates to press the closing frame 582 to move upwards, the closing frame 582 moves upwards and will not block the outlet of the flue emission frame 2 any more, the mixture of the calcium carbonate particles, the water and the redundant alkaline solution accumulated at the bottom of the flue emission frame 2 fall into the base frame 1 from the outlet, the inclined filter plate in the base frame 1 filters the calcium carbonate particles, the extra alkaline solution can flow to booster pump 41 department from the area mouth division board of base frame 1 to realize the circulation use of alkaline solution, reduce the waste of alkaline solution, and then make full use of alkaline solution entrapment carbon dioxide gas, fixed cam 581 continues to rotate and will not extrude closed frame 582, closed frame 582 can reset under the effect of gravity, the export of the stack emission framework 2 is plugged up again, avoid the flue gas leakage, rotatory promotion frid 53 rotates and can drive tension spring one 54 and slip magnetic path 55 rotation, simultaneously under the effect of centrifugation, slip magnetic path 55 can be moved to the direction of keeping away from axis of rotation 51, tension spring one 54 is stretched, slip magnetic path 55 rotates to when keeping away from axis of rotation 57 the same horizontal line with the magnet pole, under the effect of magnetic force, slip magnetic path 55 can adsorb the magnetic path 57 and move to the direction of keeping away from axis of rotation 51, magnet pole 57 can drive the cylinder 56 and remove, the cylinder 56 removes and can increase the flow of alkaline solution in intake pipe 3, thereby increase the spraying quantity of alkaline solution, the more carbon dioxide gas of catching, avoid the flue gas leakage, slip magnetic path 55 continues to rotate and will not adsorb magnet pole 57, simultaneously, under the effect of magnetic path's the effect, the high speed of the fan blade is more the flow of intake air is more than the flow is passed through to the motion of the cylinder 55, and the flow can be moved in the cylinder 56 in the direction of the same direction as the motion is more than the axis of motion is, and the cylinder is more than can be moved in order to the cylinder 56, the motion is more than can be moved, and the cylinder is more than is convenient to the motion to be moved, and can be compared with the motion is more than is in the motion to the motion, and can be.

Example 2

On the basis of embodiment 1, as shown in fig. 10-13, swing mechanism 6 is still including swing mechanism 6, swing mechanism 6 establishes on flue emission framework 2, swing mechanism 6 is used for intermittently slowing down the speed that wafts on the flue gas, let alkaline solution have sufficient time and take place the reaction with the carbon dioxide in the flue gas, lay the flue gas in flue emission framework 2 evenly simultaneously, and then let carbon dioxide gas can contact with alkaline solution evenly, thereby let carbon dioxide and alkaline solution react more thoroughly, and then more effectively catch carbon dioxide gas, swing mechanism 6 is including fixed slot plate 61, slip L-shaped slot plate 62, tension spring two 63, movable pendulum rod 64 and fixed grid strip 65, fixed slot plate 61 welds on flue emission framework 2 upper portion and is close to one side of conveyer pipe 42, fixed slot plate 61 is the level setting, fixed slot plate 61 is located shunt tubes 43 below, slip L-shaped slot plate 62 sliding connection is on fixed slot plate 61, and the slip L-shaped slot plate 62 is opened a plurality of short slot, and the slip L-shaped slot plate 62 is provided with a plurality of swing rod 64, the swing rod is fixed grid 64 is provided with two and is fixed grid 64, and two swing rod 64 are fixed by sliding connection, and two swing rod 64 are fixed grid 64 are fixed on the side of the horizontal grid 64, and are fixed grid 64 is fixed on the movable grid 64.

The rotation of the rotary pushing groove plate 53 can be in contact with the sliding L-shaped groove plate 62, the rotation of the rotary pushing groove plate 53 can extrude the sliding L-shaped groove plate 62 to move in a direction away from the rotating shaft 51, the tension spring II 63 is stretched, the sliding L-shaped groove plate 62 moves to drive the movable swinging rods 64 to swing upwards, the movable swinging rods 64 swing to drive the fixed grid strips 65 to swing upwards, the fixed grid strips 65 swing upwards to slow down the speed of floating of the flue gas, the alkaline solution can react with carbon dioxide in the flue gas for a sufficient time, the rotary pushing groove plate 53 can rotate continuously and be separated from the sliding L-shaped groove plate 62, the tension spring II 63 resets to drive the sliding L-shaped groove plate 62 to reset, the sliding L-shaped groove plate 62 resets to drive the movable swinging rods 64 to swing downwards, the movable swinging rods 64 swing downwards to drive the fixed grid strips 65 to swing downwards, and the plurality of fixed grid strips 65 swing upwards and simultaneously fan the introduced flue gas to uniformly lay the flue gas in the flue gas discharging frame 2, so that the carbon dioxide gas can uniformly contact with the alkaline solution, and the carbon dioxide can react with the alkaline solution to more thoroughly trap the carbon dioxide gas.

Example 3

On the basis of embodiment 2, as shown in fig. 14-15, the intermittent opening and closing mechanism 7 is further included, the intermittent opening and closing mechanism 7 is disposed on the conveying pipe 42, the intermittent opening and closing mechanism 7 is used for intermittently conveying alkaline solution, waste of alkaline solution can be reduced, spraying of alkaline solution can be controlled before the fixed grid strip 65 is used for fanning flue gas evenly, the introduced flue gas is sprayed after being paved evenly, the alkaline solution can be enabled to be more fully contacted with carbon dioxide gas in the flue gas, and further carbon dioxide gas is more fully trapped, the intermittent opening and closing mechanism 7 comprises a fixed rack 71, a ball valve 72 and a rotary gear 73, the fixed rack 71 is welded on the top of the sliding L-shaped groove plate 62, the ball valve 72 is rotatably connected to the upper portion of the inner side of the conveying pipe 42, the ball valve 72 is used for blocking the conveying pipe 42, the rotary gear 73 is disposed at one end of the ball valve 72 located outside the conveying pipe 42, the rotary gear 73 is located above the fixed rack 71, and the fixed rack 71 is meshed with the rotary gear 73.

Initially, the ball valve 72 does not block the delivery pipe 42, the sliding L-shaped groove plate 62 moves to drive the fixed rack 71 to move, the fixed rack 71 moves to drive the rotary gear 73 meshed with the fixed rack 71 to rotate, the rotary gear 73 rotates to drive the ball valve 72 to rotate ninety degrees, the ball valve 72 rotates ninety degrees to block the delivery pipe 42, the sliding L-shaped groove plate 62 resets to drive the fixed rack 71 to reset, the fixed rack 71 resets to drive the rotary gear 73 to reversely rotate, the rotary gear 73 reversely rotates to drive the ball valve 72 reversely rotates ninety degrees, the ball valve 72 reversely rotates ninety degrees to not block the delivery pipe 42 any more, so that the delivery pipe 42 can be intermittently blocked, alkaline solution can be intermittently delivered, not only waste of alkaline solution can be reduced, but also alkaline solution can be sprayed after the introduced flue gas is uniformly paved, the alkaline solution can be more fully contacted with carbon dioxide gas in the flue gas, and carbon dioxide gas can be more fully trapped.

Example 4

On the basis of embodiment 3, as shown in fig. 8, the utility model further comprises a spring plectrum 8, two spring plectrums 8 are fixedly connected with one side of the conveying pipe 42, which is close to the magnet rod 57, the spring plectrum 8 is used for limiting the magnet rod 57, so that the magnet rod 57 can move more stably, and then the blocking cylinder 56 can move more stably, so as to control the alkaline solution flow of the conveying pipe 42, the two spring plectrums 8 are symmetrically arranged, the blocking cylinder 56 is positioned between the two spring plectrums 8, and the blocking cylinder 56 is in contact with the spring plectrum 8.

The spring paddle 8 will limit the magnet rod 57 so that the magnet rod 57 can move more stably, thereby allowing the blocking cylinder 56 to move more stably to control the alkaline solution flow rate of the delivery tube 42.

Example 5

On the basis of embodiment 4, as shown in fig. 1, the device further comprises an electromagnetic valve extraction pipe 11, wherein the electromagnetic valve extraction pipe 11 is connected to the top of the base frame 1 and is communicated with the base frame 1, and the electromagnetic valve extraction pipe 11 is used for switching on the carbon dioxide compression device.

When the flue gas treatment is finished, no gas is introduced into the air inlet pipeline 3 by a worker, then the carbon dioxide compression equipment is connected to the electromagnetic valve extraction pipe 11, then the natural gas is used for heating the calcium carbonate particles accumulated in the base frame 1 to nine hundred degrees, the carbon dioxide gas is generated by the calcium carbonate particles at high temperature, the carbon dioxide gas is introduced into the carbon dioxide compression equipment, and the carbon dioxide gas is collected and compressed by the carbon dioxide compression equipment, so that the carbon dioxide gas is captured.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the claims, which are all within the protection of the present invention.

Claims (6)

1. A device for capturing carbon dioxide in a flue of a coal-fired power plant is characterized in that: the alkaline solution spraying device comprises a base frame (1), a flue discharging frame body (2), an air inlet pipeline (3), an alkaline solution spraying mechanism (4) and a spraying amount control mechanism (5), wherein an inclined plane filter plate and a baffle with a port are arranged in the base frame body (1), the flue discharging frame body (2) is fixedly connected to the base frame body (1), a discharging port is formed in the top of the flue discharging frame body (2), an outlet is formed in the lower portion of the flue discharging frame body (2), an inclined plane is arranged at the bottom of the flue discharging frame body (2), the flue discharging frame body (2) is communicated with the base frame body (1), the air inlet pipeline (3) is connected to the flue discharging frame body (2) and is communicated with the flue discharging frame body (2), the alkaline solution spraying mechanism (4) is arranged on the base frame body (1) and is connected with the flue discharging frame body (2), and the spraying amount control mechanism (5) is arranged on the alkaline solution spraying mechanism (4) and is connected with the flue discharging frame body (2); the alkaline solution spraying mechanism (4) comprises a booster pump (41), a conveying pipe (42), a shunt pipe (43), a fixing frame (44), a spraying pipe (45) and a spherical spray head (46), wherein the booster pump (41) is fixedly connected to the bottom of the inner side of the base frame (1), the lower end of the conveying pipe (42) is connected to the booster pump (41) and communicated with the booster pump (41), the shunt pipe (43) is connected to the upper end of the conveying pipe (42) and communicated with the conveying pipe (42), the fixing frame (44) is fixedly connected to the upper portion of the inner side of the flue discharge frame (2), three spraying pipes (45) are communicated to the shunt pipe (43), the spraying pipe (45) penetrates through the flue discharge frame (2), the spraying pipe (45) is fixedly connected with the fixing frame (44), a plurality of spherical spray heads (46) are communicated to the bottom of the spraying pipe (45), the spherical spray heads (46) are all located in the flue discharge frame (2), and a plurality of small holes are formed in the spherical spray heads (46). The spraying amount control mechanism (5) comprises a rotating shaft (51), fan blades (52), a rotary pushing groove plate (53), a tension spring I (54), a sliding magnetic block (55), a blocking cylinder (56), a magnet rod (57), a fixed cam (581) and a closing frame (582), wherein the rotating shaft (51) is rotatably connected to a flue discharging frame body (2), the rotating shaft (51) and an air inlet pipeline (3) are positioned on the same horizontal line, the fan blades (52) are fixedly connected to one end, close to the air inlet pipeline (3), of the rotating shaft (51), the fan blades (52) are positioned in the air inlet pipeline (3), the rotary pushing groove plate (53) is fixedly connected to one end, far away from the fan blades (52), of the rotating shaft (51), a sliding groove is arranged on the rotary pushing groove plate (53), the sliding magnetic block (55) is slidably connected to the sliding groove of the rotary pushing groove plate (53), the tension spring I (54) is connected between the rotary pushing groove plate (53) and the sliding magnetic block (55), the blocking cylinder (56) is slidably connected to one end, close to the air inlet pipeline (3), the fan blades (52) is fixedly connected to one end, close to the air inlet pipeline (42), and the magnet (56) is fixedly connected to one end, close to the magnet rod (56), the fixed cam (581) is fixedly connected to one side, close to the rotary pushing groove plate (53), of the rotary shaft (51), the fixed cam (581) is located between the flue emission frame body (2) and the rotary pushing groove plate (53), a closing frame (582) is connected between the base frame (1) and the flue emission frame body (2) in a sliding mode, and the upper end of the closing frame (582) is in contact with the fixed cam (581).

2. The device for capturing carbon dioxide in a flue of a coal-fired power plant according to claim 1, wherein: still including swing mechanism (6), swing mechanism (6) establish on flue emission framework (2), swing mechanism (6) are including fixed frid (61), slip L-shaped frid (62), tension spring two (63), activity pendulum rod (64) and fixed grid strip (65), fixed frid (61) fixed connection is close to one side of conveyer pipe (42) on flue emission framework (2) upper portion, fixed frid (61) are located shunt tubes (43) below, slip L-shaped frid (62) slidingtype connection is on fixed frid (61), it has a plurality of short groove to open on slip L-shaped frid (62), be connected with tension spring two (63) between fixed frid (61) and the slip L-shaped frid (62), flue emission framework (2) upper portion rotation is connected with a plurality of activity pendulum rod (64), activity pendulum rod (64) are located conveyer pipe (45) below, activity pendulum rod (64) are connected with slip L-shaped frid (62) short groove (65) on slip grid strip (65), fixed grid strip (65) are fixed grid strip (65).

3. A coal fired power plant flue carbon dioxide capturing device according to claim 2, wherein: still including intermittent type mechanism (7) that opens and shuts, intermittent type mechanism (7) that opens and shuts is established on conveyer pipe (42), intermittent type mechanism (7) that opens and shuts is including fixed rack (71), ball valve (72) and rotation gear (73), fixed rack (71) fixed connection is at slip L-shaped groove plate (62) top, ball valve (72) swivelling joint is in conveyer pipe (42) inboard upper portion, rotation gear (73) fixed connection is located the one end outside conveyer pipe (42) in ball valve (72), rotation gear (73) are located fixed rack (71) top, fixed rack (71) and rotation gear (73) meshing.

4. A coal fired power plant flue carbon dioxide capturing device according to claim 3, wherein: the novel conveying pipe is characterized by further comprising spring shifting sheets (8), wherein two spring shifting sheets (8) are fixedly connected to one side, close to the magnet rod (57), of the conveying pipe (42), the two spring shifting sheets (8) are symmetrically arranged, a blocking cylinder (56) is located between the two spring shifting sheets (8), and the blocking cylinder (56) is in contact with the spring shifting sheets (8).

5. The device for capturing carbon dioxide in a flue of a coal-fired power plant according to claim 4, wherein: the electromagnetic valve suction pipe (11) is connected to the top of the base frame (1) and is communicated with the base frame (1).

6. A method for using the device for capturing carbon dioxide in the flue of a coal-fired power plant, which is characterized in that: the method comprises the following working steps:

step one: when carbon dioxide trapping is needed, the flue gas subjected to desulfurization, denitrification and dust removal is led into an air inlet pipeline (3);

step two: the booster pump (41) starts to work, alkaline solution is pumped into the spray pipe (45) to spray through the spherical spray head (46), and the alkaline solution absorbs carbon dioxide and becomes a mixture of calcium carbonate particles and water;

step three: meanwhile, when the smoke passes through the air inlet pipeline (3), the smoke can drive the fan blades (52) to rotate, and the magnet rod (57) and the blocking cylinder (56) can stably move left and right under the action of the spring poking piece (8) to control the pumping quantity of alkaline solution, so that the waste of the alkaline solution is reduced;

step four: when the smoke drives the rotating shaft (51) and the rotary pushing groove plate (53) to rotate, the sliding L-shaped groove plate (62) is pushed to move, and the movable rod and the fixed grid strips (65) swing for a certain angle to fold up, so that the speed of floating the smoke is slowed down, and the alkaline solution can react with carbon dioxide in the smoke more fully;

step five: when the sliding L-shaped groove plate (62) moves reciprocally, the fixed rack (71) is driven to move reciprocally, and the ball valve (72) can close and connect the conveying pipe (42), so that the aim of reducing waste of alkaline solution by intermittent spraying is fulfilled;

step six: when the smoke gas drives the rotating shaft (51) and the rotary pushing groove plate (53) to rotate, the fixed cam (581) is also driven to rotate, and the closing frame (582) is pushed to lift and open;

step seven: when the flue gas is sprayed for a certain time, calcium carbonate particles are accumulated at the bottom of the base frame (1), and the rest alkaline solution reaches a certain height and flows to the booster pump (41);

step eight: when the flue gas is no longer subjected to carbon dioxide capture, the accumulated calcium carbonate particles are heated to 900 degrees by natural gas, high purity carbon dioxide gas is extracted, and then collected and compressed.

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