Flue gas denitration device for solid waste treatment system

Abstract

The utility model belongs to the field of waste gas treatment, and particularly relates to a flue gas denitration device for a solid waste treatment system, which comprises an incinerator, one side of the incinerator is fixedly connected with one end of a waste gas pipe, the other end of the waste gas pipe is fixedly connected with a treatment device, and an ammonia water device is arranged at the top end of the treatment device. A hose is fixedly connected to the bottom end of the ammonia water device, the bottom end of the hose penetrates through the top end of the treatment device and is fixedly connected with a disc spraying head, a lifting mechanism is arranged at the top end of the disc spraying head and comprises two moving grooves, the two moving grooves are formed in the top end of the treatment device, and a screw is arranged at the top end of the treatment device. The two ends of the screw penetrate through the two moving grooves and are rotationally connected with one ends of the two moving grooves. The flow of waste gas is measured through the airflow detection device, so that the motor is started to be matched with the lifting mechanism to achieve lifting of the disc spraying head, and the height of the disc spraying head is adjusted to adapt to the exhaust amount of the incinerator waste gas.

Description

Technical Field

[0001] The utility model relates to the field of waste gas treatment, in particular to a flue gas denitration device for a solid waste treatment system. Background Art

[0002] When processing waste solids, they need to be incinerated inside the incinerator. During the incineration process, gases containing nitrogen oxides NOX will be produced. These gases are one of the important sources of atmospheric pollution and their pollution hazards are very serious, so these gases need to be denitrified before they can be discharged.

[0003] A flue gas denitrification device for a solid waste treatment system with announcement number CN218687588U in the prior art comprises an incinerator, a reaction chamber A is arranged on one side of the incinerator, a gas pipeline is arranged between the incinerator and the reaction chamber A, and a filter assembly is arranged inside the gas pipeline. The utility model is provided with an insulation assembly, and vacuum insulation panels and ultra-fine glass wool panels are pasted on the outer surfaces of the incinerator, reaction chamber B, filter chamber, reaction chamber A and the gas pipeline. Both have low thermal conductivity and can play a double insulation role to insulate high-temperature exhaust gas and prevent workers from being scalded when approaching; the utility model is provided with a filter assembly, and the filter net arranged inside the gas pipeline can filter dust in the flue gas to prevent dust from entering the reaction chamber A and other devices with the flue gas and affecting the desulfurization effect of the flue gas, and the reinforcing plate can support the filter net to prevent it from being damaged by impact.

[0004] The flue gas of the flue gas denitrification device in the above-mentioned solid waste treatment system is exhausted through combustion in the incinerator. The flow rate of the flue gas generated varies with the fire intensity or the amount of solid waste, and the flue gas will precipitate in the denitrification device, so it is very important to reasonably select the injection position. Usually, a suitable position is selected before the flue gas enters the denitrification system to ensure that the denitrification agent can be fully mixed and cover the entire flue gas cross-section. The position of the ammonia water spray head inside the current flue gas denitrification device cannot be adjusted and is usually installed at the top of the denitrification system. When less flue gas is generated, in order to save reducing agent, the amount of ammonia water spraying is reduced, but the ammonia water reaches the flue gas surface during the spraying process and becomes dispersed and cannot be fully mixed with the flue gas. Utility Model Content

[0005] The purpose of the utility model is to provide a flue gas denitrification device for a solid waste treatment system to make up for the shortcomings of the prior art. Currently, flue gas is exhausted through combustion in an incinerator. As the fire or the amount of solid waste varies, the flow rate of the flue gas is also different, and the flue gas will precipitate in the denitrification device. Therefore, it is very important to reasonably select the injection position. Usually, a suitable position is selected before the flue gas enters the denitrification system to ensure that the denitrification agent can be fully mixed and cover the entire flue gas cross-section. However, the position of the ammonia water spray head inside the current flue gas denitrification device cannot be adjusted and is usually installed at the top of the denitrification system. When less flue gas is generated, in order to save reducing agent, the amount of ammonia water sprayed is reduced. However, when the ammonia water reaches the flue gas surface during the spraying process, it becomes dispersed and cannot be fully mixed with the flue gas.

[0006] The utility model is realized through the following technical solutions:

[0007] A flue gas denitrification device for a solid waste treatment system comprises an incinerator, a treatment device is arranged on one side of the incinerator, a lifting mechanism is arranged inside the treatment device, the lifting mechanism comprises two groups of movable grooves, and the two groups of movable grooves are opened at the top of the treatment device, a screw is arranged at the top of the treatment device, and both ends of the screw pass through the two groups of movable grooves and are rotatably connected to one end of the two groups of movable grooves, a movable block is arranged inside the movable groove, the movable block is threadedly connected to the screw, and the bottom end of the movable block is fixedly connected to a first hinged seat.

[0008] Furthermore, the first hinge seat is hinged to one end of the rotating rod, the other end of the rotating rod is hinged to the second hinge seat, the second hinge seat is fixedly connected to the lifting block, the lifting block is fixedly connected to the top of the disc spray head, the incinerator is fixedly connected to one end of the exhaust pipe, the other end of the exhaust pipe is fixedly connected to the treatment device, the treatment device is fixedly connected to the outlet pipe, an ammonia device is provided at the top of the treatment device, a hose is fixedly connected to the bottom end of the ammonia device, and the bottom end of the hose passes through the top of the treatment device and is fixedly connected to the disc spray head.

[0009] Furthermore, the threads opened on the outer side of the screw inside the two groups of movable grooves at the top of the processing device are opposite, the size of the movable block is adapted to the movable groove, a motor is fixedly connected to the front of the processing device, and the output shaft of the motor passes through the processing device and is fixedly connected to one end of the screw.

[0010] Furthermore, an airflow detection device is arranged on the outside of the exhaust pipe, and a valve is arranged on the outside of the exhaust pipe.

[0011] Furthermore, an inclined plate is fixedly connected to the bottom end of the processing device, a water outlet is provided on the lower horizontal side of the inclined plate, the water outlet is opened at the front of the processing device, a stone storage trough is fixedly connected to the front of the water outlet, and a filter plate is provided at the front of the stone storage trough.

[0012] Furthermore, a first mounting plate is fixedly connected to both sides of the filter plate, a second mounting plate is fixedly connected to both sides of the front of the stone storage tank, and screws are passed through the inside of the first mounting plate and the second mounting plate, and bolts are threadedly connected to the outer side of the screws.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model realizes the rotation of the screw by turning on the motor through the structural design of the lifting mechanism, so that the moving blocks inside the two groups of moving grooves move toward each other, so as to cooperate with the rotating rod to realize the lifting and lowering of the lifting block and the disc spray head, so as to adapt to the different flue gas flow rates and flow conditions that require changing the disc spray head height of the ammonia water spraying speed and quantity of the disc spray head, and solves the problem that the flue gas is currently exhausted through the combustion of the incinerator, and the flow rate and flow conditions of the generated flue gas are different with the fire or the amount of solid waste, and the flue gas will precipitate in the denitrification device, so it is very important to reasonably select the injection position, usually a suitable position before the flue gas enters the denitrification system to ensure that the denitrification agent can be fully mixed and cover the entire flue gas cross section, while the position of the ammonia water spray head inside the current flue gas denitrification device cannot be adjusted, and is usually installed at the top of the denitrification system. When the flue gas is less, in order to save the reducing agent, the ammonia water spraying amount is reduced, but the ammonia water reaches the flue gas surface during the spraying process and becomes dispersed and cannot be fully mixed with the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the lifting mechanism of the utility model;

[0017] Figure 3 It is a schematic structural diagram of a side cross-section of a processing device of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the filter plate disassembly of the utility model.

[0019] In the figure: 1. incinerator; 2. exhaust pipe; 3. treatment device; 4. exhaust pipe; 5. ammonia device; 6. hose; 7. disc spray head; 8. moving groove; 9. screw; 10. moving block; 11. motor; 12. first hinge seat; 13. rotating rod; 14. second hinge seat; 15. lifting block; 16. air flow detection device; 17. valve; 18. inclined plate; 19. water outlet; 20. stone storage tank; 21. filter plate; 22. first mounting plate; 23. second mounting plate; 24. screw; 25. bolt. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the creation of the present invention.

[0021] The utility model is further described below in conjunction with the accompanying drawings.

[0022] A flue gas denitrification device for a solid waste treatment system, such as Figure 1-Figure 4 As shown, it includes an incinerator 1, a processing device 3 is arranged on one side of the incinerator 1, a lifting mechanism is arranged inside the processing device 3, the lifting mechanism includes two groups of moving grooves 8, and the two groups of moving grooves 8 are opened at the top of the processing device 3, a screw rod 9 is arranged at the top of the processing device 3, and the two ends of the screw rod 9 pass through the two groups of moving grooves 8 and are rotatably connected with one end of the two groups of moving grooves 8, a moving block 10 is arranged inside the moving groove 8, the moving block 10 is threadedly connected with the screw rod 9, and the bottom end of the moving block 10 is fixedly connected with a first hinge seat 12;

[0023] Further, such as Figure 2 and Figure 3 As shown, the first hinge seat 12 is hinged to one end of the rotating rod 13, the other end of the rotating rod 13 is hinged to the second hinge seat 14, the second hinge seat 14 is fixedly connected to the lifting block 15, the lifting block 15 is fixedly connected to the top of the disc spray head 7, the incinerator 1 is fixedly connected to one end of the exhaust pipe 2, the other end of the exhaust pipe 2 is fixedly connected to the treatment device 3, the treatment device 3 is fixedly connected to the outlet pipe 4, the top of the treatment device 3 is provided with an ammonia device 5, the bottom end of the ammonia device 5 is fixedly connected to a hose 6, the bottom end of the hose 6 passes through the top of the treatment device 3 and is fixedly connected to the disc spray head 7;

[0024] During operation, solid waste is burned inside the incinerator 1 and flue gas is generated, which enters the treatment device 3 through the exhaust pipe 2. The ammonia device 5 sprays ammonia water from the top of the disc spray head 7 through the hose 6, and reacts with the flue gas inside the treatment device 3 to achieve denitrification. After the flue gas flow rate is determined, the ammonia water spraying speed and quantity need to be changed. At the same time, due to the physical property of precipitation with the flue gas, when the flue gas is less, the flue gas will be at the bottom of the treatment device 3. At this time, the ammonia water with a large flow rate will cause waste, but the ammonia water with a small flow rate will cause waste in the process of spraying and falling. The ammonia solution will be too dispersed in the flue gas, so the height of the disc spray head 7 needs to be lowered. On the contrary, when the flue gas flow rate is large, the height of the disc spray head needs to be raised so that the ammonia solution can be completely sprayed on the top of the flue gas. Therefore, the screw 9 is driven to rotate by turning on the motor 11. The rotation of the screw 9 will drive the moving blocks 10 inside the two groups of moving grooves 8 to move toward each other. When the two groups of moving blocks 10 move toward each other, the first articulated seat 12, the second articulated seat 14 and the rotating rod 13 cooperate with each other to make the lifting block 15 drive the disc spray head 7 to rise and fall, thereby adjusting the appropriate position.

[0025] Further, such as Figure 3 As shown, the threads on the outer sides of the screw rods 9 in the two groups of moving grooves 8 at the top of the processing device 3 are opposite, the size of the moving block 10 is adapted to the moving grooves 8, a motor 11 is fixedly connected to the front of the processing device 3, and the output shaft of the motor 11 passes through the processing device 3 and is fixedly connected to one end of the screw rod 9;

[0026] During operation, the size of the moving block 10 is adapted to the moving groove 8 to hinder the tendency of the moving block 10 to rotate together when the screw 9 rotates, so the moving block 10 can move with the rotation of the screw 9. The threads on the outer sides of the screw 9 inside the two sets of moving grooves 8 are opposite, so when the screw 9 rotates, the moving blocks 10 inside the two sets of moving grooves 8 can move toward each other, otherwise they can only move in the same direction and the lifting block 15 cannot be lifted or lowered.

[0027] Further, such as Figure 1 As shown, an airflow detection device 16 is provided on the outside of the exhaust pipe 2, and a valve 17 is provided on the outside of the outlet pipe 4;

[0028] When working, the airflow detection device 16 can detect the flow rate of the flue gas discharged from the exhaust pipe 2, so that the computational fluid dynamics simulation can help evaluate the flue gas flow distribution under different operating conditions. When the flue gas denitrification work is completed, the valve 17 can be opened to allow the gas to be discharged to the next process device.

[0029] Further, such as Figure 3As shown, an inclined plate 18 is fixedly connected to the bottom of the processing device 3, and a water outlet 19 is arranged on the lower side of the inclined plate 18. The water outlet 19 is opened at the front of the processing device 3, and a stone storage tank 20 is fixedly connected to the front of the water outlet 19, and a filter plate 21 is arranged in front of the stone storage tank 20;

[0030] During operation, since ammonia water is sprayed from the disc spray head 7, and in order to ensure complete flue gas denitrification, the dosage of ammonia water will be greater than the dosage just required for the reaction, there will definitely be unreacted ammonia water and water produced by the denitrification reaction flowing to the bottom of the treatment device 3. Through the setting of the inclined plate 18, these water and reducing agent ammonia water will flow to the lower side of the inclined plate 18, that is, flow out from the water outlet 19 to the inside of the stone storage tank 20. Since the flue gas contains many particulate impurities, these particulate impurities will be blocked by the filter plate 21, and the liquid will flow out through the filter plate 21 to the corresponding equipment for treatment.

[0031] Further, such as Figure 4 As shown, the filter plate 21 is fixedly connected to the first mounting plate 22 on both sides, the stone storage tank 20 is fixedly connected to the second mounting plate 23 on both sides of the front, and the first mounting plate 22 and the second mounting plate 23 are penetrated by screws 24, and the outer side of the screw 24 is threadedly connected with a bolt 25;

[0032] During operation, when the amount of impurities inside the stone storage tank 20 reaches the point where cleaning is required, the filter plate 21 needs to be removed, the bolts 25 need to be removed from the outside of the screws 24, and the screws 24 need to be pulled out from the inside of the first mounting plate 22 and the second mounting plate 23.

[0033] Working principle: solid waste burns inside the incinerator 1 and produces flue gas which enters the treatment device 3 through the exhaust pipe 2. The ammonia device 5 sprays ammonia from the top of the disc spray head 7 through the hose 6, and reacts with the flue gas inside the treatment device 3 to achieve denitrification. After the flue gas flow rate is determined by the airflow detection device 16, computational fluid dynamics simulation can help evaluate the distribution of flue gas flow under different operating conditions. It is necessary to change the ammonia spray speed and quantity. At the same time, due to the physical property of precipitation of flue gas, when the flue gas is less, the flue gas will be at the bottom of the treatment device 3. At this time, ammonia with a large flow rate will cause waste, but ammonia with a small flow rate will be too dispersed during the spraying and falling process, so it is necessary to lower the height of the disc spray head 7. On the contrary, when the flue gas flow rate is large, it is necessary to increase the height of the disc spray head so that the ammonia is completely sprayed on the top of the flue gas. Therefore, the motor 11 is turned on to drive the screw 9 to rotate, and the rotation of the screw 9 will drive the moving blocks 10 inside the two sets of moving grooves 8 to move toward each other. At this time, the first hinge The seat 12, the second hinge seat 14 and the rotating rod 13 cooperate with each other to make the lifting block 15 drive the disc spray head 7 to rise and fall, so as to adjust the appropriate position. The ammonia device 5 evenly sprays the ammonia through the hose 6 and the disc spray head 7, and reacts with the flue gas. Since the ammonia is sprayed from the disc spray head 7, and in order to ensure the complete denitration of the flue gas, the dosage of the ammonia will be greater than the dosage that just reacts, so there must be unreacted ammonia and water produced by the denitration reaction flowing to the bottom of the treatment device 3, through the inclined Due to the arrangement of the plate 18, the water and the reducing agent ammonia water will flow to the lower side of the inclined plate 18, that is, flow out from the water outlet 19 to the inside of the stone storage tank 20. Since the flue gas contains many particulate impurities, these particulate impurities will be blocked by the filter plate 21, and the liquid will flow out through the filter plate 21 to the corresponding equipment for treatment. When the amount of impurities inside the stone storage tank 20 reaches the point where cleaning is required, it is necessary to remove the filter plate 21, remove the bolt 25 from the outside of the screw 24, and pull the screw 24 out from the first mounting plate 22 and the second mounting plate 23.

[0034] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A flue gas denitrification device for a solid waste treatment system, characterized in that: The invention comprises an incinerator (1), wherein a processing device (3) is arranged on one side of the incinerator (1), wherein a lifting mechanism is arranged inside the processing device (3), wherein the lifting mechanism comprises two groups of movable grooves (8), wherein the two groups of movable grooves (8) are opened at the top of the processing device (3), wherein a screw rod (9) is arranged at the top of the processing device (3), and the two ends of the screw rod (9) pass through the two groups of movable grooves (8) and are rotatably connected to one end of the two groups of movable grooves (8), wherein a movable block (10) is arranged inside the movable groove (8), wherein the movable block (10) is threadedly connected to the screw rod (9), and wherein the bottom end of the movable block (10) is fixedly connected to a first hinge seat (12).

2. The flue gas denitrification device for a solid waste treatment system according to claim 1, characterized in that: The first hinge seat (12) is hinged to one end of the rotating rod (13), the other end of the rotating rod (13) is hinged to the second hinge seat (14), the second hinge seat (14) is fixedly connected to the lifting block (15), the lifting block (15) is fixedly connected to the top of the disc spray head (7), the incinerator (1) is fixedly connected to one end of the exhaust pipe (2), the other end of the exhaust pipe (2) is fixedly connected to the treatment device (3), the treatment device (3) is fixedly connected to the outlet pipe (4), the top of the treatment device (3) is provided with an ammonia device (5), the bottom end of the ammonia device (5) is fixedly connected to a hose (6), the bottom end of the hose (6) passes through the top of the treatment device (3) and is fixedly connected to the disc spray head (7).

3. The flue gas denitrification device for a solid waste treatment system according to claim 2, characterized in that: The threads formed on the outer sides of the screw rods (9) inside the two groups of movable grooves (8) at the top of the processing device (3) are opposite to each other, the size of the movable block (10) is mutually compatible with the movable grooves (8), and a motor (11) is fixedly connected to the front of the processing device (3), and the output shaft of the motor (11) passes through the processing device (3) and is fixedly connected to one end of the screw rod (9).

4. The flue gas denitrification device for a solid waste treatment system according to claim 3, characterized in that: An airflow detection device (16) is arranged on the outside of the exhaust pipe (2), and a valve (17) is arranged on the outside of the outlet pipe (4).

5. The flue gas denitrification device for a solid waste treatment system according to claim 1, characterized in that: The bottom end of the processing device (3) is fixedly connected to an inclined plate (18), a water outlet (19) is provided on a lower horizontal side of the inclined plate (18), the water outlet (19) is opened at the front of the processing device (3), the front of the water outlet (19) is fixedly connected to a stone storage trough (20), and the front of the stone storage trough (20) is provided with a filter plate (21).

6. The flue gas denitrification device for a solid waste treatment system according to claim 5, characterized in that: The filter plate (21) is fixedly connected to a first mounting plate (22) on both sides, and the stone storage tank (20) is fixedly connected to a second mounting plate (23) on both sides of the front, and screws (24) penetrate the inside of the first mounting plate (22) and the second mounting plate (23), and bolts (25) are threadedly connected to the outside of the screws (24).

Images