Flue gas desulfurization and denitrification integrated device

Abstract

The utility model discloses a flue gas desulfurization and denitrification integrated device, which belongs to the technical field of flue gas desulfurization and denitrification integrated equipment and comprises a filtering device, a flue gas inlet pipe is fixedly mounted on one side of the filtering device, and a flue gas outlet pipe is fixedly mounted on the other side of the filtering device. The end, away from the filtering device, of the flue gas outlet pipe is fixedly connected with a desulfurization device through a connecting pipe, the gas outlet end of the desulfurization device is fixedly connected with a denitration device through a connecting pipe, the gas outlet end of the denitration device is fixedly connected with a packed bed reactor through a connecting pipe, and the gas outlet end of the packed bed reactor is fixedly connected with a flue gas condenser through a connecting pipe. The air outlet end of the smoke condenser is fixedly connected with a chimney through a connecting pipe, the top end of the chimney is fixedly connected with a smoke discharging pipe used for discharging smoke, a double-layer filtering system is formed through a filtering structure and an auxiliary structure, large-particle dust is intercepted through a filtering plate, and then fine dust is separated in cooperation with a filtering membrane; dust impurities in the flue gas are efficiently removed, and the purification efficiency is improved.

Description

An integrated flue gas desulfurization and denitrification device Technical Field

[0001] This utility model relates to the technical field of integrated flue gas desulfurization and denitrification equipment, specifically an integrated flue gas desulfurization and denitrification device. Background Technology

[0002] The integrated flue gas desulfurization and denitrification device consists of core components such as a filtration device, a desulfurization device, a denitrification device, a packed bed reactor, and a flue gas condenser. These components are connected in an orderly manner through pipelines to achieve efficient purification of flue gas and heat recovery, thereby achieving the goal of energy conservation and emission reduction.

[0003] Chinese patent discloses an integrated flue gas desulfurization and denitrification device (publication number CN211098034U). This patent includes: an inlet end of a filter device connected to a flue gas inlet pipe; an inlet end of the desulfurization device connected to the outlet end of the filter device via a first pipe; the desulfurization device connected to a desulfurization liquid circulation tank via a first circulation pipe; an inlet end of the denitrification device connected to the outlet end of the desulfurization device via a second pipe; the denitrification device connected to a denitrification liquid circulation tank via a second circulation pipe; an inlet end of a packed bed reactor connected to the outlet end of the denitrification device via a third pipe; an inlet end of a flue gas condenser connected to the outlet end of the packed bed reactor via a fourth pipe; and an outlet end of the flue gas condenser connected to a chimney.

[0004] Therefore, based on the above-mentioned search and combined with existing methods, the pore size of the filter screen in the filtration device can only intercept large impurities and cannot effectively capture small particles and gaseous pollutants. If the pore size of the filter screen is designed too small, it will greatly increase the resistance of flue gas passage, reduce the treatment efficiency, and also make the filter screen very easy to clog. Frequent replacement of the filter screen will increase the operating cost. However, this patent cannot prevent the appearance of these residual impurities. In the subsequent desulfurization and denitrification process, the residual fine particles will adhere to the reaction surface of the desulfurization and denitrification device, hindering the full contact between the absorbent and the sulfur and nitrogen pollutants in the flue gas, reducing the reaction efficiency, resulting in a decrease in the desulfurization and denitrification effect and failing to meet the expected purification standards. At the same time, the fine particles, driven by the high-speed flue gas, will cause continuous scouring and wear on the internal pipes, packing, adsorption panels and other components of the desulfurization and denitrification equipment, shortening the service life of the equipment, increasing the equipment maintenance and replacement costs, and seriously affecting the stable operation of the equipment. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated flue gas desulfurization and denitrification device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An integrated flue gas desulfurization and denitrification device includes a filtration device. A flue gas inlet pipe is fixedly installed on one side of the filtration device, and a flue gas outlet pipe is fixedly installed on the other side. The end of the flue gas outlet pipe away from the filtration device is fixedly connected to a desulfurization device via a connecting pipe. The outlet end of the desulfurization device is fixedly connected to a denitrification device via a connecting pipe. The outlet end of the denitrification device is fixedly connected to a packed bed reactor via a connecting pipe. The outlet end of the packed bed reactor is fixedly connected to a flue gas condenser via a connecting pipe. The outlet end of the flue gas condenser is fixedly connected to a chimney via a connecting pipe. The top of the chimney is fixedly connected to an exhaust pipe for discharging flue gas.

[0008] The filter device has a filter structure for filtering flue gas fixedly installed in its inner cavity, and the flue gas outlet pipe has an auxiliary structure for further filtering particulate dust in the flue gas fixedly installed in its inner cavity.

[0009] As a further embodiment of this utility model, the auxiliary structure includes mounting rings, wherein multiple mounting rings are provided and all are fixedly installed on the inner wall of the flue gas outlet pipe, and a filter membrane for separating fine dust in the flue gas is installed on one side of each mounting ring, and a scraper for removing dust from the filter membrane is installed on one side of the filter membrane.

[0010] As a further embodiment of this utility model, the auxiliary structure also includes a fixed shaft, which is fixedly installed in the inner cavity of the flue gas outlet pipe. The outer wall of the fixed shaft is rotatably fitted with a vibrating plate for driving the scraper to swing, and the vibrating plate is located on one side of the filter membrane.

[0011] As a further embodiment of this utility model, a dust collection trough is fixedly connected to the bottom end of the flue gas outlet pipe, and a dust discharge pipe is fixedly connected to the dust collection trough. A sealing cap for preventing dust leakage is threaded onto the bottom end of the dust discharge pipe.

[0012] As a further embodiment of this utility model, the filter structure includes a fixed frame, wherein there are two fixed frames, both of which are fixedly installed in the inner cavity of the filter device, and a filter plate for preliminary filtration of dust in flue gas is fixedly installed in the inner cavity of each fixed frame.

[0013] As a further embodiment of this utility model, a fixing frame is installed on one side of each of the two fixing frames, and multiple rotating shafts are rotatably installed in the inner cavity of each fixing frame. A scraper for cleaning the filter plate is installed on one side of each rotating shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. When this utility model is used, a double-layer filtration system is formed through the filter structure and auxiliary structure. The filter plate first intercepts large dust particles, and then the filter membrane separates fine dust particles, thereby achieving efficient removal of dust and impurities in the flue gas. At the same time, the kinetic energy of the flue gas itself drives the scraper to clean the filter plate, and the pressure difference and flue gas flow drive the scraper and vibrating plate to clean the filter membrane, reducing the frequency of manual maintenance, continuously ensuring the filtration effect, and thus providing better flue gas conditions for subsequent desulfurization and denitrification processes, thereby improving the overall purification efficiency.

[0016] 2. When this utility model is used, it integrates functional modules such as filtration, desulfurization, denitrification, and condensation in an orderly manner, and forms an integrated treatment process through pipeline connection. During operation, it makes full use of the kinetic energy of flue gas flow to drive the cleaning components to operate, without the need for additional power equipment, thus realizing the effective recovery and utilization of energy. This reduces equipment operating costs and conforms to the environmental protection concept of energy conservation and emission reduction, resulting in good economic and environmental benefits. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall structure of an integrated flue gas desulfurization and denitrification device.

[0018] Figure 2 is a structural diagram of the filtration device in an integrated flue gas desulfurization and denitrification device.

[0019] Figure 3 is a cross-sectional view of the filter device in an integrated flue gas desulfurization and denitrification device.

[0020] Figure 4 is a structural diagram of the auxiliary structure in an integrated flue gas desulfurization and denitrification device.

[0021] Figure 5 is a structural diagram of the filter structure in an integrated flue gas desulfurization and denitrification device.

[0022] Figure 6 is a cross-sectional view of the filter structure in an integrated flue gas desulfurization and denitrification device.

[0023] In the diagram: 1. Filter device; 101. Fixed frame; 102. Filter plate; 103. Fixed bracket; 104. Rotating shaft; 105. Connecting bracket; 106. Scraper; 107. Positioning bracket; 108. Rotating shaft; 109. Rotating blade; 110. Transmission rod; 111. Connecting piece; 112. Collection box; 2. Flue gas inlet pipe; 3. Flue gas outlet pipe; 301. Mounting ring; 302. Filter membrane; 303. Scraper; 304. Fixed ring; 305. Fixed shaft; 306. Vibrating plate; 307. Limiting shaft; 308. Limiting bracket; 309. Collection trough box; 310. Dust discharge pipe; 4. Desulfurization device; 5. Denitrification device; 6. Packed bed reactor; 7. Flue gas condenser; 8. Chimney; 9. Exhaust pipe; 10. Support frame; 11. Main control box. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figures 1 and 2. An integrated flue gas desulfurization and denitrification device includes a filter device 1. A flue gas inlet pipe 2 is fixedly installed on one side of the filter device 1, and a flue gas outlet pipe 3 is fixedly installed on the other side. The end of the flue gas outlet pipe 3 away from the filter device 1 is fixedly connected to a desulfurization device 4 through a connecting pipe. The outlet end of the desulfurization device 4 is fixedly connected to a denitrification device 5 through a connecting pipe. The outlet end of the denitrification device 5 is fixedly connected to a packed bed reactor 6 through a connecting pipe. The outlet end of the packed bed reactor 6 is fixedly connected to a flue gas condenser 7 through a connecting pipe. The outlet end of the flue gas condenser 7 is fixedly connected to a chimney 8 through a connecting pipe. The top of the chimney 8 is fixedly connected to an exhaust pipe 9 for discharging flue gas.

[0026] The filter device 1 has a filter structure for filtering flue gas fixedly installed in its inner cavity, and the flue gas outlet pipe 3 has an auxiliary structure for further filtering particulate dust in the flue gas fixedly installed in its inner cavity.

[0027] Specifically, a support frame 10 for fixing and supporting the filter device 1 is fixedly installed on the outer wall of the filter device 1, and the flue gas inlet pipe 2 and the flue gas outlet pipe 3 both pass through the filter device 1. A main control box 11 for controlling the overall operation of the device is fixedly installed on one side of the support frame 10.

[0028] Please refer to Figures 3 and 4. The auxiliary structure includes mounting rings 301. Multiple mounting rings 301 are provided and are all fixedly installed on the inner wall of the flue gas outlet pipe 3. Each mounting ring 301 has a filter membrane 302 installed on one side for separating fine dust in the flue gas. A scraper 303 for removing dust from the filter membrane 302 is installed on one side of the filter membrane 302.

[0029] Specifically, the filter membrane 302 is made of polypropylene, and the filter membrane 302 has multiple filter holes inside. The filter holes are used to separate and intercept fine dust in the flue gas. When the filter membrane 302 is used for a long time, the filtered dust may clog the filter holes, causing the flue gas to encounter resistance when passing through the filter membrane 302. A pressure difference is formed on both sides of the filter membrane 302. The filter membrane 302 has a certain degree of elasticity. Under the action of the pressure difference, the filter membrane 302 deforms towards the low-pressure side, thereby pushing the filter membrane 302 to bulge and pulling to enlarge the filter holes. At the same time, the bulging filter membrane 302 approaches the scraper 303. The flow of flue gas causes the scraper 303 to swing, thereby shaking off the dust particles on the surface of the filter membrane 302.

[0030] More specifically, each filter membrane 302 is connected to a fixing ring 304 on the side away from the mounting ring 301 for fixing and limiting the filter membrane 302, and the filter membrane 302 is located between the mounting ring 301 and the fixing ring 304. The two are interlocked to fix the filter membrane 302.

[0031] The auxiliary structure also includes a fixed shaft 305, which is fixedly installed in the inner cavity of the flue gas outlet pipe 3. The outer wall of the fixed shaft 305 is rotatably sleeved with a vibrating plate 306 for driving the scraper 303 to swing through a bearing, and the vibrating plate 306 is located on one side of the filter membrane 302.

[0032] Specifically, the scraper 303 is fixedly installed on the side of the vibrating plate 306 near the filter membrane 302, and the installation direction of the vibrating plate 306 is perpendicular to the flue gas flow direction. The fixed shaft 305 provides a rotation support point for the vibrating plate 306. Vertical installation can make more efficient use of the flue gas flow energy.

[0033] More specifically, each vibrating disc 306 is fixedly connected to a limiting shaft 307 at both its upper and lower ends. The limiting shaft 307 is used to limit the vibration range of the vibrating disc 306. The outer wall of the fixed shaft 305 is fixedly fitted with a limiting frame 308 through a bearing. There are two sets of limiting frames 308 located at the upper and lower ends of the vibrating disc 306. The left and right ends of the limiting frame 308 are provided with sliding grooves for the limiting shaft 307 to slide. The limiting shaft 307 is located in the sliding groove, which effectively prevents the vibrating disc 306 from deviating or swinging significantly due to irregular fluctuations of flue gas or sudden strong flue gas impact. It also prevents it from having a hard collision with the inner wall of the flue gas outlet pipe 3. In addition, the sliding groove is used to limit the swing amplitude of the vibrating disc 306, ensuring that the swing caused by the airflow vibration is more uniform and stable. It can accurately and continuously act on the surface of the filter membrane 302, shake dust particles rhythmically off the filter membrane 302, ensure the filtration accuracy of the filter membrane 302, and ensure that impurities in the flue gas are efficiently intercepted.

[0034] The bottom end of the flue gas outlet pipe 3 is fixedly connected to a collection trough 309 for collecting dust, and the bottom of the collection trough 309 is provided with an inclined surface to guide the dust to move and accumulate to one side. The collection trough 309 is fixedly connected to a dust discharge pipe 310, and the bottom end of the dust discharge pipe 310 is threaded with a sealing cap for preventing dust leakage.

[0035] Specifically, the bottom end of the flue gas outlet pipe 3 is provided with a dust collection trough to facilitate the falling of dust, and the dust collection trough is located on one side of the filter membrane 302.

[0036] Example 2: Please refer to Figures 3, 5, and 6. Based on Example 1, the filter structure includes a fixed frame 101. There are two fixed frames 101, both of which are fixedly installed in the inner cavity of the filter device 1. Each fixed frame 101 has a filter plate 102 fixedly installed in the inner cavity for preliminary filtration of dust in the flue gas.

[0037] Specifically, the surface of the filter plate 102 is covered with fine filter holes, which can quickly capture and intercept larger dust particles in the flue gas, thus achieving preliminary purification of the flue gas.

[0038] A fixing frame 103 is installed on one side of each of the two fixing frames 101, and the fixing frame 103 is fixedly connected to the inner cavity of the filter device 1. Multiple rotating shafts 104 are rotatably installed in the inner cavity of the fixing frame 103 through bearings. A connecting frame 105 is fixedly sleeved on the outer wall of each rotating shaft 104. A scraper 106 for cleaning the filter plate 102 is installed on one side of each rotating shaft 104, and the scraper 106 is tightly connected to the connecting frame 105. Its material has both hardness and flexibility, and can effectively remove dust and impurities attached to the filter plate 102 without damaging the surface of the filter plate 102.

[0039] Specifically, a positioning frame 107 is installed between the two fixed frames 103. A rotating shaft 108 is rotatably inserted into the inner cavity of the positioning frame 107. A rotating blade 109 for providing rotational power is fixedly sleeved on the outer wall of the rotating shaft 108. A transmission rod 110 is fixedly connected to both ends of the rotating shaft 108. A connecting piece 111 is rotatably connected to the end of the transmission rod 110 near the rotating shaft 104. The connecting piece 111 is rotatably connected to the rotating shaft 104 through a pin.

[0040] When the flue gas passes through the filter device 1, the high-speed flue gas will impact the rotating blade 109, causing it to generate rotational power, which converts the kinetic energy of the flue gas flow into the driving force of the cleaning system. As the rotating shaft 108 rotates, the transmission rods 110 at both ends of it will also rotate. Through the precise rotational connection between the connecting piece 111 and the rotating shaft 104, the power is transmitted to the rotating shaft 104, which in turn drives the connecting frame 105 and the scraper 106 to swing, thereby realizing the all-round automatic cleaning of the filter plate 102.

[0041] More specifically, a collection box 112 for uniformly collecting dust is fixedly installed at the bottom of the filter device 1.

[0042] The working principle of this utility model is as follows:

[0043] First, the flue gas enters the filter device 1 from the flue gas inlet pipe 2. The filter plate 102 inside the filter device 1 intercepts larger dust particles in the flue gas with its fine filter holes, completing the initial filtration. At the same time, the high-speed flue gas impacts the rotating blades 109, which drives the rotating shaft 108 to rotate. The power is transmitted to the rotating shaft 104 through the transmission rod 110 and the connecting piece 111, causing the connecting frame 105 and the scraper 106 to swing, realizing the automatic cleaning of dust on the filter plate 102. The dust falls into the collection box 112 for unified collection.

[0044] The pre-filtered flue gas then flows out through the flue gas outlet pipe 3. Multiple filter membranes 302 separate and intercept fine dust using their internal filtration holes. When the filter membranes 302 are blocked by dust and a pressure difference is formed on both sides, the elastic filter membranes 302 bulge and approach the scraper strip 303. The flue gas flow causes the scraper strip 303 to swing and shake off the dust. At the same time, the flue gas pushes the vibrating plate 306, which is installed perpendicular to the flue gas flow direction, to rotate around the fixed shaft 305, causing the scraper strip 303 to swing and further remove the dust from the filter membranes 302. The limiting shaft 307 and the limiting frame 308 ensure that the vibrating plate 306 swings stably. The fallen dust enters the collection box 309 through the dust collection trough and is discharged through the dust discharge pipe 310.

[0045] After completing the double filtration, the flue gas enters the desulfurization unit 4 for desulfurization and the denitrification unit 5 for denitrification through the connecting pipe, then enters the packed bed reactor 6 for deep treatment, and finally cools down in the flue gas condenser 7 before being discharged through the chimney 8 and the exhaust pipe 9 to meet the emission standards. The entire process is controlled by the main control box 11, and the support frame 10 provides stable support for the filter device 1 to ensure the orderly operation of each link.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An integrated flue gas desulfurization and denitrification device, comprising a filtration device (1), characterized in that, A flue gas inlet pipe (2) is fixedly installed on one side of the filter device (1), and a flue gas outlet pipe (3) is fixedly installed on the other side. The end of the flue gas outlet pipe (3) away from the filter device (1) is fixedly connected to a desulfurization device (4) through a connecting pipe. The outlet end of the desulfurization device (4) is fixedly connected to a denitrification device (5) through a connecting pipe. The outlet end of the denitrification device (5) is fixedly connected to a packed bed reactor (6) through a connecting pipe. The outlet end of the packed bed reactor (6) is fixedly connected to a flue gas condenser (7) through a connecting pipe. The outlet end of the flue gas condenser (7) is fixedly connected to a chimney (8) through a connecting pipe. The top of the chimney (8) is fixedly connected to a flue gas exhaust pipe (9). A filter structure for filtering flue gas is fixedly installed in the inner cavity of the filter device (1), and an auxiliary structure for further filtering particulate dust in the flue gas is fixedly installed in the inner cavity of the flue gas outlet pipe (3).

2. The integrated flue gas desulfurization and denitrification device according to claim 1, characterized in that, The auxiliary structure includes mounting rings (301), which are provided in multiple ways and are all fixedly installed on the inner wall of the flue gas outlet pipe (3). Each mounting ring (301) has a filter membrane (302) for separating fine dust in the flue gas installed on one side, and a scraper (303) for removing dust from the filter membrane (302) is installed on one side of the filter membrane (302).

3. The integrated flue gas desulfurization and denitrification device according to claim 2, characterized in that, The auxiliary structure also includes a fixed shaft (305), which is fixedly installed in the inner cavity of the flue gas outlet pipe (3). The outer wall of the fixed shaft (305) is rotatably fitted with a vibrating plate (306) for driving the scraper (303) to swing, and the vibrating plate (306) is located on one side of the filter membrane (302).

4. The integrated flue gas desulfurization and denitrification device according to claim 1, characterized in that, The bottom end of the flue gas outlet pipe (3) is fixedly connected to a dust collection trough (309), and the dust collection trough (309) is fixedly connected to a dust discharge pipe (310). The bottom end of the dust discharge pipe (310) is threaded with a sealing cap to prevent dust leakage.

5. The integrated flue gas desulfurization and denitrification device according to claim 1, characterized in that, The filter structure includes a fixed frame (101), which has two fixed frames (101) and is fixedly installed in the inner cavity of the filter device (1). Each fixed frame (101) has a filter plate (102) fixedly installed in its inner cavity for preliminary filtration of dust in the flue gas.

6. The integrated flue gas desulfurization and denitrification device according to claim 5, characterized in that, Each of the two fixed frames (101) has a fixed bracket (103) installed on one side of each fixed frame (103). The inner cavity of each fixed bracket (103) is rotatably equipped with a plurality of rotating shafts (104). Each rotating shaft (104) has a scraper (106) for cleaning the filter plate (102) installed on one side.

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