Flue gas denitration device for waste incineration power generation

Abstract

The utility model discloses a waste incineration power generation flue gas denitration device which comprises a device main body, end plates are arranged at the two ends of the device main body, a partition plate is arranged in the device main body, an induced draft fan is arranged on one side of each end plate, a filter plate is arranged in the device main body, and the partition plate is arranged on the other side of each end plate. An air guide pipe is arranged in the device body, a through hole is formed in the other partition plate, a breathable membrane is arranged in the through hole, an exhaust pipe is arranged on one side of the end plate, a first electromagnetic valve is arranged at the other end of the exhaust pipe, and a backflow pipe is arranged above the device body. According to the denitration device, liquid ammonia and nitric oxide react to achieve denitration, the denitrated flue gas is detected, the flue gas meeting the flue gas emission standard is exhausted from the exhaust pipe, the flue gas not meeting the emission standard is subjected to denitration treatment again from the backflow pipe, and the denitration efficiency is improved. The flue gas denitration effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flue gas denitration, in particular to a kind of waste incineration flue gas denitration device. BACKGROUND

[0002] Waste incineration power generation is a kind of life garbage combustion at high temperature, makes combustible waste in life garbage into carbon dioxide and water, etc., and the residual heat generated simultaneously is used for power generation technology, a large amount of nitrogen oxide gas is generated in the process of waste incineration, and the most serious substance harmful to the environment is nitrate, we should adopt scientific and reasonable flue gas denitration technology, flue gas denitration refers to the reduction of nitrogen oxide (NOx) into nitrogen (N2), thereby removing NOx in flue gas, by adding appropriate reducing agent or catalyst in the combustion process or flue gas treatment system, make NOx into nitrogen and water, to reduce the purpose of NOx emission.

[0003] The utility model discloses a kind of waste incineration flue gas denitration device, including pipeline, the both sides outer wall of the pipeline is fixedly connected with connection flange, the inner wall of the pipeline is fixedly connected with machine shell, the inner wall of the machine shell is fixedly connected with vertical rod, the right side surface of the vertical rod is fixedly connected with small motor, the output of the small motor is fixedly connected with rotating shaft, the outer side surface of the rotating shaft is fixedly connected with fan blade, the left side outer wall of the machine shell is fixedly connected with guard fence, the inner wall of the pipeline and located the right side of machine shell is fixedly connected with coarse filter screen, the bottom wall inside of the pipeline is opened with blanking hole, the lower surface of the pipeline is equipped with collection groove.The utility model, with fan blade, make flue gas can quickly circulate, it is favorable to improve the rate of flue gas denitration, improve work efficiency, not easy gas stagnation occurs, simultaneously utilize guard fence, not easy make sundries enter pipeline and injure fan blade.

[0004] Existing flue gas denitration is reduced into liquid ammonia in flue gas and carried out reduction reaction, with flue gas continues to be passed in, can cause liquid ammonia concentration to drop, reduction reaction rate drops, easy to cause part of flue gas without carrying out to directly enter emission channel, reduce flue gas denitration efficiency, the flue gas discharged is not up to standard, can not satisfy use demand. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of waste incineration flue gas denitration device to solve the problem that existing flue gas denitration is carried out reduction reaction in liquid ammonia in flue gas, with flue gas continues to be passed in, can cause liquid ammonia concentration to drop, reduction reaction rate drops, easy to cause part of flue gas without carrying out to directly enter emission channel, reduce flue gas denitration efficiency, the flue gas discharged is not up to standard, can not satisfy use demand in the above background art.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a garbage incineration power generation flue gas denitration device, including device main part, both ends of device main part all are provided with end plate, end plate is provided with two, and end plate is connected with device main part through screw, the inside of device main part is provided with baffle, baffle is provided with two, and baffle is set up as a whole with device main part, the side of end plate is provided with induced draft fan, and induced draft fan is connected as a whole with end plate, the inside of device main part is provided with filter plate, and filter plate is set up in the side of a baffle, filter plate is fixedly connected with device main part, and filter plate is set up obliquely, the upper end of device main part is provided with feeding opening subassembly, the inside of device main part is provided with gas guide pipe, and gas guide pipe is connected as a whole with a baffle, gas guide pipe is set up as L type, and the lower end of gas guide pipe extends to the bottom of device main part, another baffle is provided with through -hole, the inside of through -hole is provided with gas permeable diaphragm, and gas permeable diaphragm is connected as a whole with baffle, the side of end plate is provided with exhaust pipe, and one end of exhaust pipe is connected as a whole with end plate, the other end of exhaust pipe is provided with first electromagnetic valve, and first electromagnetic valve is connected as a whole with exhaust pipe, the top of device main part is provided with backflow pipe, and backflow pipe is connected as a whole with device main part and exhaust pipe, one end of backflow pipe extends to the bottom of device main part, backflow pipe is provided with second electromagnetic valve, and second electromagnetic valve is connected as a whole with backflow pipe, the side of device main part is provided with nitrogen oxide sensor, and nitrogen oxide sensor is connected as a whole with device main part.

[0007] Preferably, the bottom of the device main body is provided with a discharge port, and the discharge port is arranged on one side of the lower end of the filter plate, a discharge plate is arranged below the discharge port, and the discharge plate is inserted with the device main body, a visual window is arranged on one side of the device main body, and the visual window is arranged as a whole with the device main body.

[0008] Preferably, the top of the device main body is provided with a motor, and the motor is connected with the device main body through screws, the inside of the device main body is provided with a stirring paddle, and the upper end of the stirring paddle is connected with the output end of the motor, the lower end of the device main body is provided with a damping seat, and the damping seat is provided with two, and the damping seat is fixedly connected with the device main body.

[0009] Preferably, the top of the device main body is provided with an electric heating plate, and the electric heating plate is fixedly connected with the device main body, and the electric heating plate is arranged above the discharge port.

[0010] Preferably, the top of the device body is provided with a hollow plate, and the hollow plate is fixedly connected with the device body, the lower end of the hollow plate is provided with an atomizing nozzle, and the atomizing nozzle is integrated with the hollow plate, one side of the device body is provided with a pump body, and the pump body is connected with the device body through screws, both ends of the pump body are connected with connecting pipes, and the connecting pipes are integrated with the hollow plate and the device body, the bottom of the device body is provided with a filter head, and the filter head is fixedly connected with the device body, and the filter head is arranged on one side of the connecting pipe.

[0011] Preferably, one side of the device body is provided with a liquid discharge valve, and an ammonia concentration sensor is arranged above the liquid discharge valve, and the liquid discharge valve and the ammonia concentration sensor are integrated with the device body.

[0012] Preferably, the inside of the device body is provided with a drying plate, and the drying plate is fixedly connected with the device body, and the drying plate is arranged on one side of the exhaust pipe.

[0013] Compared with the prior art, the device has the advantages that:

[0014] 1. The device is provided with a filter plate, an electric heating plate, a nitrogen oxide sensor, an exhaust pipe, a first electromagnetic valve, a return pipe and a second electromagnetic valve, the filter plate filters flue gas to remove particulate impurities in the flue gas, the filtered flue gas is injected into liquid ammonia, the nitrogen oxides in the flue gas react with the liquid ammonia, the electric heating plate heats the flue gas to be denitrated, the temperature of the flue gas is increased, the heated flue gas is beneficial to the denitrification reaction, the denitrified flue gas flows into the exhaust pipe, the nitrogen oxide sensor detects the denitrified flue gas, when the denitrified flue gas reaches the emission standard, the first electromagnetic valve is opened to discharge, when the denitrified flue gas does not reach the emission standard, the second electromagnetic valve is opened to inject the flue gas into the liquid ammonia again for denitrification treatment, and the flue gas denitrification effect is improved.

[0015] 2. The device is provided with a motor, a hollow plate, a connecting pipe, a pump body, a stirring paddle and an atomizing nozzle, the motor drives the stirring paddle to rotate, the rotating stirring paddle stirs the liquid ammonia, the pump body extracts the liquid ammonia and sends it into the hollow plate through the connecting pipe, and then the liquid ammonia is atomized and sprayed out through the atomizing nozzle, the sprayed liquid ammonia reacts with the scattered flue gas, and the flue gas denitrification efficiency is further improved.

[0016] 3. The device is provided with a liquid discharge valve and an ammonia concentration sensor, the ammonia concentration sensor measures the concentration of the liquid ammonia, and when the concentration of the liquid ammonia is insufficient, the liquid discharge valve is opened to discharge and replace new liquid ammonia, so that the flue gas denitrification effect is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the utility model;

[0018] Figure 2 This is a side view of the present invention;

[0019] Figure 3 This is a cross-sectional view of section AA of this utility model;

[0020] Figure 4 This is a cross-sectional view of the BB section of this utility model;

[0021] Figure 5 For the present utility model Figure 3 A magnified view of a portion of area B.

[0022] In the diagram: 1. Main body of the device; 2. End plate; 3. Exhaust fan; 4. Vibration damping seat; 5. Electric heating plate; 6. Discharge plate; 7. Viewing window; 8. Drain valve; 9. Ammonia concentration sensor; 10. Nitrogen oxide sensor; 11. Exhaust pipe; 12. First solenoid valve; 13. Return pipe; 14. Motor; 15. Hollow plate; 16. Connecting pipe; 17. Pump body; 18. Second solenoid valve; 19. Partition plate; 20. Air guide pipe; 21. Agitator; 22. Filter plate; 23. Feed port assembly; 24. Discharge port; 25. Drying plate; 26. Atomizing nozzle; 27. Filter head; 28. Through hole; 29. ​​Breathable membrane. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figures 1-5This utility model provides an embodiment of a waste incineration power generation flue gas denitrification device, comprising a device body 1, with end plates 2 at both ends of the device body 1, two of which are connected to the device body 1 by screws. Two partitions 19 are provided inside the device body 1, and the partitions 19 are integrally formed with the device body 1. An induced draft fan 3 is provided on one side of each end plate 2, and the induced draft fan 3 is integrally connected to the end plate 2. A filter plate 22 is provided inside the device body 1, and... A filter plate 22 is disposed on one side of a partition 19. The filter plate 22 is fixedly connected to the main body 1 of the device and is inclined. A feed port assembly 23 is disposed at the upper end of the main body 1. An air guide pipe 20 is disposed inside the main body 1 and is integrally connected to a partition 19. The air guide pipe 20 is L-shaped and its lower end extends to the bottom of the main body 1. A through hole 28 is disposed on another partition 19. An air-permeable membrane 29 is disposed inside the through hole 28. The device is integrated with the partition plate 19. An exhaust pipe 11 is provided on one side of the end plate 2, with one end of the exhaust pipe 11 integrated with the end plate 2. A first solenoid valve 12 is provided at the other end of the exhaust pipe 11, and the first solenoid valve 12 is integrated with the exhaust pipe 11. A return pipe 13 is provided above the main body 1, and the return pipe 13 is integrated with the main body 1 and the exhaust pipe 11. One end of the return pipe 13 extends to the bottom of the main body 1, and a second solenoid valve 18 is provided on the return pipe 13. The device body 1 is integrated with the return pipe 13. A nitrogen oxide sensor 10 is provided on one side of the device body 1 and is integrated with the device body 1. A motor 14 is provided on the top of the device body 1 and is connected to the device body 1 by screws. A stirring paddle 21 is provided inside the device body 1 and the upper end of the stirring paddle 21 is connected to the output end of the motor 14. Vibration damping seats 4 are provided at the bottom of both ends of the device body 1. There are two vibration damping seats 4 and they are fixedly connected to the device body 1.

[0025] In use: Liquid ammonia is added to the main body 1 of the device through the feed port assembly 23. The induced draft fan 3 is turned on to draw the flue gas into the main body 1 of the device. The filter plate 22 filters the flue gas to remove particulate impurities. The filtered flue gas is injected into the liquid ammonia through the air guide pipe 20. The nitrogen oxides in the flue gas react with the liquid ammonia. The motor 14 is turned on to drive the stirring paddle 21 to rotate. The rotating stirring paddle 21 agitates the liquid ammonia, accelerates the reaction between nitrogen oxides and liquid ammonia, and eliminates nitrogen oxides in the flue gas. The denitrified flue gas flows into the exhaust pipe 11 through the through hole 28. The nitrogen oxide sensor 10 detects the denitrified flue gas. When the denitrified flue gas meets the emission standard, the first solenoid valve 12 is opened to discharge it. When the denitrified flue gas does not meet the emission standard, the second solenoid valve 18 is opened to re-inject the flue gas into the liquid ammonia for denitrification again, thereby improving the flue gas denitrification efficiency.

[0026] Please see Figure 1 and Figure 3 The device body 1 has a discharge port 24 at its bottom, which is located on one side of the lower end of the filter plate 22. A discharge plate 6 is located below the discharge port 24 and is inserted into the device body 1. A viewing window 7 is located on one side of the device body 1 and is integrated with the device body 1. An electric heating plate 5 is located on the top of the device body 1 and is fixedly connected to the device body 1. The electric heating plate 5 is located above the discharge port 24. Particulate impurities filtered from the flue gas fall into the discharge port 24. Removing the discharge plate 6 facilitates the discharge of particulate impurities. The electric heating plate 5 heats the flue gas to be denitrified, raising the temperature of the flue gas. The heated flue gas is conducive to the denitrification reaction.

[0027] Please see Figure 1 and Figure 4 The device body 1 has a hollow plate 15 on its top, which is fixedly connected to the device body 1. The lower end of the hollow plate 15 is equipped with an atomizing nozzle 26, which is integrated with the hollow plate 15. A pump body 17 is provided on one side of the device body 1, which is connected to the device body 1 by screws. Both ends of the pump body 17 are connected to connecting pipes 16, which are integrated with both the hollow plate 15 and the device body 1. A filter head 27 is provided at the bottom of the device body 1, which is fixedly connected to the device body 1. The filter head 27 is located on one side of the connecting pipe 16. When the pump body 17 is turned on, liquid ammonia is drawn and sent into the hollow plate 15 through the connecting pipe 16. The liquid ammonia is then atomized and sprayed out through the atomizing nozzle 26. The sprayed liquid ammonia reacts with the dispersed flue gas, further improving the flue gas denitrification efficiency.

[0028] Please see Figure 1 and Figure 4 A drain valve 8 is provided on one side of the main body 1 of the device, and an ammonia concentration sensor 9 is provided above the drain valve 8. The drain valve 8 and the ammonia concentration sensor 9 are both connected to the main body 1 of the device as a whole. A drying plate 25 is provided inside the main body 1 of the device, and the drying plate 25 is fixedly connected to the main body 1 of the device. The drying plate 25 is located on one side of the exhaust pipe 11. The ammonia concentration sensor 9 measures the liquid ammonia concentration. When the liquid ammonia concentration is insufficient, the drain valve 8 is opened to discharge and replace the liquid ammonia. The drying plate 25 dries the discharged flue gas and reduces the humidity of the discharged flue gas.

[0029] Working principle: Liquid ammonia is added to the main body 1 of the device through the feed port assembly 23. The induced draft fan 3 is turned on to draw flue gas into the main body 1 of the device. The electric heating plate 5 is turned on to heat the flue gas to be denitrified, raising the temperature of the flue gas. The filter plate 22 filters the flue gas, removing particulate impurities. The filtered flue gas is injected into the liquid ammonia through the gas guide pipe 20. The nitrogen oxides in the flue gas react with the liquid ammonia. The motor 14 is turned on to drive the stirring paddle 21 to rotate. The rotating stirring paddle 21 agitates the liquid ammonia, accelerating the reaction between nitrogen oxides and liquid ammonia. The pump body 17 is turned on to draw liquid ammonia and send it into the hollow core through the connecting pipe 16. In plate 15, liquid ammonia is atomized and sprayed out through atomizing nozzle 26. The sprayed liquid ammonia reacts with the dispersed flue gas to eliminate nitrogen oxides in the flue gas. The denitrified flue gas flows into exhaust pipe 11 through through hole 28. Nitrogen oxide sensor 10 detects the denitrified flue gas. When the denitrified flue gas meets the emission standard, the first solenoid valve 12 is opened to discharge it. When the denitrified flue gas does not meet the emission standard, the second solenoid valve 18 is opened to re-inject the flue gas into liquid ammonia for denitrification treatment again. Ammonia concentration sensor 9 measures the liquid ammonia concentration. When the liquid ammonia concentration is insufficient, the drain valve 8 is opened to discharge and replace it with new liquid ammonia.

[0030] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste incineration power plant flue gas denitration device comprising a device main body (1), characterized in that: Both ends of the device body (1) are provided with end plates (2), the end plates (2) are provided with two, and the end plates (2) are connected with the device body (1) through screws, the inside of the device body (1) is provided with partitions (19), the partitions (19) are provided with two, and the partitions (19) are arranged in one body with the device body (1), one side of the end plate (2) is provided with an air drafter (3), and the air drafter (3) is connected with the end plate (2) as a whole, the inside of the device body (1) is provided with a filter plate (22), and the filter plate (22) is arranged on one side of one partition (19), the filter plate (22) is fixedly connected with the device body (1), and the filter plate (22) is arranged obliquely, the upper end of the device body (1) is provided with a feeding port assembly (23), the inside of the device body (1) is provided with a gas guide pipe (20), and the gas guide pipe (20) is connected with one partition (19) as a whole, the gas guide pipe (20) is arranged in an L shape, and the lower end of the gas guide pipe (20) extends to the bottom of the device body (1), another partition (19) is provided with a through hole (28), the inside of the through hole (28) is provided with a breathable diaphragm (29), and the breathable diaphragm (29) is connected with the partition (19) as a whole, one side of the end plate (2) is provided with an exhaust pipe (11), and one end of the exhaust pipe (11) is connected with the end plate (2) as a whole, the other end of the exhaust pipe (11) is provided with a first electromagnetic valve (12), and the first electromagnetic valve (12) is connected with the exhaust pipe (11) as a whole, the upper side of the device body (1) is provided with a backflow pipe (13), and the backflow pipe (13) is connected with the device body (1) and the exhaust pipe (11) as a whole, one end of the backflow pipe (13) extends to the bottom of the device body (1), the backflow pipe (13) is provided with a second electromagnetic valve (18), and the second electromagnetic valve (18) is connected with the backflow pipe (13) as a whole, one side of the device body (1) is provided with a nitrogen oxide sensor (10), and the nitrogen oxide sensor (10) is connected with the device body (1) as a whole.

2. The device for flue gas denitration of waste incineration power generation according to claim 1, characterized in that: The bottom of the device body (1) is provided with a discharge port (24), and the discharge port (24) is arranged on one side of the lower end of the filter plate (22), the lower side of the discharge port (24) is provided with a discharge plate (6), and the discharge plate (6) is inserted with the device body (1), one side of the device body (1) is provided with a visual window (7), and the visual window (7) is arranged in one body with the device body (1).

3. The device for flue gas denitration of waste incineration power generation according to claim 1, characterized in that: The upper side of the device body (1) is provided with a motor (14), and the motor (14) is connected with the device body (1) through screws, the inside of the device body (1) is provided with a stirring paddle (21), and the upper end of the stirring paddle (21) is connected with the output end of the motor (14), the lower side of both ends of the device body (1) is provided with a damping seat (4), the damping seat (4) is provided with two, and the damping seat (4) is fixedly connected with the device body (1).

4. The device for flue gas denitration of waste incineration power generation according to claim 1, characterized in that: The top of the device body (1) is provided with an electric heating plate (5), and the electric heating plate (5) is fixedly connected with the device body (1), the electric heating plate (5) is arranged above the discharge port (24).

5. The device for flue gas denitration of waste incineration power generation according to claim 1, characterized in that: The top of the device body (1) is provided with a hollow plate (15), and the hollow plate (15) is fixedly connected with the device body (1), the lower end of the hollow plate (15) is provided with an atomizing nozzle (26), and the atomizing nozzle (26) is connected with the hollow plate (15) as a whole, one side of the device body (1) is provided with a pump body (17), and the pump body (17) is connected with the device body (1) through screws, both ends of the pump body (17) are connected with connecting pipes (16), and the connecting pipes (16) are connected with the hollow plate (15) and the device body (1) as a whole, the bottom of the device body (1) is provided with a filter head (27), and the filter head (27) is fixedly connected with the device body (1), the filter head (27) is arranged on one side of the connecting pipe (16).

6. The device for flue gas denitration of waste incineration power generation according to claim 1, characterized in that: One side of the device body (1) is provided with a liquid discharge valve (8), an ammonia concentration sensor (9) is arranged above the liquid discharge valve (8), and the liquid discharge valve (8) and the ammonia concentration sensor (9) are connected with the device body (1) as a whole.

7. The device for flue gas denitration of waste incineration power generation according to claim 1, characterized in that: The inside of the device body (1) is provided with a drying plate (25), and the drying plate (25) is fixedly connected with the device body (1), the drying plate (25) is arranged on one side of the exhaust pipe (11).

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