Kiln flue gas cooling device with desulfurization and denitrification structure

Abstract

The utility model discloses a kiln flue gas cooling device with a desulfurization and denitrification structure, which is characterized in that a flue gas heat exchanger is mounted on the side surface of a flue gas pipe, and a gas outlet pipe is connected to the side surface of the flue gas heat exchanger; according to the kiln flue gas cooling device with the desulfurization and denitrification structure, a gas outlet pipe can extend through sliding between a fixing plate and a second fixing block, after the gas outlet pipe extends to a designated position, the fixing plate is extruded through threads, so that the gas outlet pipe is fixed, and the length of the gas outlet pipe is adjusted; a gas outlet pipe can be conveniently adjusted according to needs when being connected with a pipeline, a reducing agent in a storage tank is sprayed into a denitration reactor through a denitration spray gun so as to react with nitrate in flue gas, and oxides are selectively reduced into nitrogen and water, so that the flue gas can be denitrated by the device; and finally, limestone is sprayed and wetted through a spray head, and the wet limestone can react to produce calcium sulfite when being in contact with sulfur in the flue gas, so that the environmental protection is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kiln flue gas, in particular to a kiln flue gas cooling device provided with a desulfurization and denitrification structure. Background Art

[0002] Kiln flue gas is the waste gas produced during the combustion process in the kiln. Its main components include carbon dioxide, carbon monoxide, nitrogen oxides, sulfur dioxide and suspended particulate matter. These gases and particulate matter are harmful to the environment and human health, so they need to be purified and treated.

[0003] In the prior art, a Chinese patent with authorization announcement number CN205679078U discloses a cooling device for a waste flue gas pipeline of a roasting furnace, which belongs to the field of kiln flue gas. Its technical points are that a circulating water inlet is connected to the outside of the waste flue gas pipeline, and a circulating water collecting chamber is connected to the end of the waste flue gas pipeline, and the circulating water collecting chamber is connected to a cooling water pool. The cooling water pool is provided with a water injection port and a circulating water outlet. The circulating water outlet is connected to a pump, and the water pipe of the pump is connected to the circulating water inlet. After the pump pumps the cooling water, it enters the waste flue gas pipeline from the circulating water inlet for cooling and then enters the circulating water collecting chamber and the cooling water pool. This recycling method saves resources and can achieve the cooling effect on the waste flue gas pipeline, reduce the temperature of the waste flue gas, enhance the dust removal effect of the electric tar precipitator, and ensure the safe and stable operation of the roasting furnace, so as to solve the problem that the waste flue gas pipeline of the roasting furnace is unsafe due to excessively high temperature.

[0004] At present, most of the flue gas cooling devices on the market still have certain deficiencies when used. As shown in the above documents, the device saves water waste by circulating water, but in factories, such as glass factories, the flue gas contains sulfur and nitrate, which will cause great harm to the environment when discharged. Secondly, there may be a slight difference in distance when the cooling device is connected to the pipeline. Since the pipeline length is fixed, there are certain deficiencies in its use. Utility Model Content

[0005] The utility model aims to provide a kiln flue gas cooling device with a desulfurization and denitrification structure to solve the problems in the above background technology that the flue gas cooling device is inconvenient for denitrification and inconvenient for installing pipelines.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a furnace flue gas cooling device with a desulfurization and denitrification structure, comprising a flue pipe, a flue gas heat exchanger is installed on the side of the flue pipe, and an exhaust pipe is connected to the side of the flue gas heat exchanger;

[0007] The first fixing blocks are fixed on the top and bottom of the flue gas heat exchanger, a fixing plate is fixed on the front of the first fixing block, a sliding groove is provided on the surface of the fixing plate, and an extension mechanism is provided on the side of the flue gas heat exchanger, through which the length of the outlet pipe when connected to the pipeline can be adjusted;

[0008] The side of the gas outlet pipe is connected to an external pipe, the end of the external pipe is connected to a denitration reactor, and a denitration mechanism is arranged inside the external pipe, through which the nitrate contained in the flue gas can be purified.

[0009] Furthermore, the extension mechanism includes a bellows, and the bellows is connected between the flue gas heat exchanger and the air outlet pipe, and second fixing blocks are fixed to the top and bottom of the air outlet pipe.

[0010] Furthermore, a bolt is fixed to the top of the air outlet pipe near the second fixing block, the bolt penetrates and slides inside the slide groove, and a nut is threadedly connected to the surface of the bolt.

[0011] Furthermore, the denitrification mechanism includes a storage tank, and the storage tank is connected to the side of the denitrification reactor. The output end of the storage tank is connected to a denitrification spray gun, and the denitrification spray gun is connected through the inside of the denitrification reactor. A desulfurization mechanism is arranged on the side of the denitrification reactor.

[0012] Furthermore, the desulfurization mechanism includes a box body, and the box body is connected to the end of the gas outlet of the denitration reactor, the top of the box body is connected to a discharge port, and the side of the box body is connected to a water tank.

[0013] Furthermore, a water pump is installed on the top of the water tank, a storage box is connected to the bottom surface of the box body, and two groups of perforated trays are connected to the inside of the box body.

[0014] Furthermore, the top of the perforated tray is connected with limestone, the inside of the box body near the perforated tray is connected with a water pipe, and the end of the water pipe is connected to the water outlet of the water pump, and the surface of the water pipe is connected with multiple groups of nozzles.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The kiln flue gas cooling device with a desulfurization and denitration structure can extend the outlet pipe by sliding between the fixed plate and the second fixed block. After extending to the specified position, the outlet pipe is fixed by squeezing the fixed plate with the thread, so that the length of the outlet pipe can be adjusted, which is convenient for the outlet pipe to be adjusted as needed when connecting the pipeline. The reducing agent in the storage tank is sprayed into the denitration reactor through the denitration spray gun to react with the nitrate in the flue gas, and the oxide is selectively reduced to nitrogen and water, so that the device can denitrate the flue gas, thereby improving the protection of the environment. Finally, the limestone is sprayed and moistened through the nozzle, and the moistened limestone can react to produce calcium sulfite when it contacts the sulfur in the flue gas, thereby further improving the protection of the environment.

[0017] 2. A second fixing block and a fixing plate are provided, and the sliding of the air outlet pipe can be realized by sliding between the fixing plate and the second fixing block, which supports the air outlet pipe and makes the operation smoother and more convenient;

[0018] 3. A slide groove is provided. When the slide groove and the bolt slide, the slide groove can be limited, thereby preventing the outlet pipe from being adjusted too long, affecting the safe use of the device, and improving the safety of the outlet pipe when extending;

[0019] 4. A denitrification spray gun is provided, through which the liquid inside the storage tank can be sprayed out to react with the nitrate in the flue gas, thereby achieving the denitrification effect of the device;

[0020] 5. Nozzles are provided, and a more intensive spraying effect can be achieved through multiple groups of nozzles, so that the limestone contacts more evenly, thereby improving the desulfurization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall front-view stereoscopic structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall rear-view stereoscopic structure of the utility model;

[0023] Figure 3 This is a cross-sectional enlarged three-dimensional structural schematic diagram of the second fixing block of the utility model;

[0024] Figure 4 This is an enlarged three-dimensional structural diagram of the box body of the utility model;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the box body of the utility model;

[0026] Figure 6 It is a schematic diagram of the enlarged three-dimensional structure of the perforated tray of the utility model.

[0027] In the figure: 1. smoke pipe; 2. flue gas heat exchanger; 3. exhaust pipe; 201. first fixing block; 202. fixing plate; 203. slide groove; 204. bellows; 205. second fixing block; 206. bolt; 207. nut; 301. external pipe; 302. denitrification reactor; 303. storage tank; 304. denitrification spray gun; 305. box; 306. discharge port; 307. water tank; 308. water pump; 309. storage box; 310. perforated tray; 311. limestone; 312. water pipe; 313. nozzle. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Embodiment 1:

[0030] like Figure 1-Figure 3 The technical solution shown in the figure, the present invention provides the following technical solution: In order to solve the problem that the distance between the flue gas cooling device and the pipeline may be insufficient, an extension mechanism is disclosed:

[0031] A flue gas heat exchanger 2 is installed on the side of the smoke pipe 1, and an outlet pipe 3 is connected to the side of the flue gas heat exchanger 2. A first fixed block 201 is fixed to the top and bottom of the flue gas heat exchanger 2, a fixed plate 202 is fixed to the front of the first fixed block 201, and a slide groove 203 is opened through the surface of the fixed plate 202. An extension mechanism is provided on the side of the flue gas heat exchanger 2, and the length of the outlet pipe 3 when connected to the pipeline can be adjusted by the extension mechanism. An external pipe 301 is connected to the side of the outlet pipe 3, and a denitrification reactor 302 is connected to the end of the external pipe 301. A denitrification mechanism is provided inside the external pipe 301, and the denitrification mechanism can be used to purify the nitrate contained in the flue gas.

[0032] The extension mechanism includes a bellows 204, and the bellows 204 is connected between the flue gas heat exchanger 2 and the outlet pipe 3. The second fixing blocks 205 are fixed to the top and bottom of the outlet pipe 3. A bolt 206 is fixed to the top of the outlet pipe 3 near the second fixing block 205. The bolt 206 penetrates and slides inside the slide groove 203. The surface of the bolt 206 is threadedly connected with a nut 207. When the flue gas cooling device is connected to the pipeline, the outlet pipe 3 is pulled to drive the bolt 206 and the second fixing block 205 to move. When the bolt 206 moves, it can slide through the slide groove 203. The second fixing block 206 is fixed to the top of the outlet pipe 3 near the second fixing block 205. The bolt 206 passes through the slide groove 203. The second fixing block 206 is connected to the second fixing block 205. When block 205 moves, it can slide through the fixed plate 202. When the outlet pipe 3 slides, the corrugated tube 204 can be stretched through the flue gas heat exchanger 2. After the outlet pipe 3 is stretched to the specified position, the nut 207 is moved. When the nut 207 moves to the end of the bolt 206, it can be rotated. When the nut 207 rotates, the fixed plate 202 can be squeezed by thread sliding. After the fixed plate 202 is squeezed, it can be fixed to the outlet pipe 3. At this time, the outlet pipe 3 can be adjusted to the specified position, which is convenient for the outlet pipe 3 to be adjusted as needed when connecting the pipeline.

[0033] Embodiment 2:

[0034] like Figure 2 The technical solution shown in the figure, the present invention provides the following technical solution: In order to solve the problem that the flue gas cooling device does not have a denitrification structure and the discharge is easy to cause pollution, a denitrification mechanism is disclosed:

[0035] The denitrification mechanism includes a storage tank 303, and the storage tank 303 is connected to the side of the denitrification reactor 302. The output end of the storage tank 303 is connected to a denitrification spray gun 304, and the denitrification spray gun 304 is connected to the inside of the denitrification reactor 302. A desulfurization mechanism is arranged on the side of the denitrification reactor 302. When the flue gas enters the inside of the smoke pipe 1, the flue gas cooling device absorbs the heat of the gas through the flue gas heat exchanger 2, thereby realizing the cooling of the flue gas. The flue gas after being cooled to a certain temperature is transported to the inside of the denitrification reactor 302 through the outlet pipe 3 and the external pipe 301. At this time, the denitrification spray gun 304 can be started to spray the reducing agent in the storage tank 303 into the inside of the denitrification reactor 302. When the nitrate in the flue gas contacts the reducing agent, the oxide in the flue gas can be selectively reduced to nitrogen and water, so that the device can realize denitrification of the flue gas and improve the protection of the environment.

[0036] Embodiment three:

[0037] like Figure 4-Figure 6 The technical solution shown in the figure, the present invention provides the following technical solution: In order to solve the problem that the flue gas cooling device is inconvenient for desulfurization, a desulfurization mechanism is disclosed:

[0038] The desulfurization mechanism includes a box body 305, and the box body 305 is connected to the end of the gas outlet of the denitration reactor 302, the top of the box body 305 is connected to a discharge port 306, the side of the box body 305 is connected to a water tank 307, the top of the water tank 307 is installed with a water pump 308, the bottom of the box body 305 is connected to a storage box 309, the inside of the box body 305 is connected to two groups of perforated trays 310, the tops of the perforated trays 310 are connected to limestone 311, the inside of the box body 305 near the perforated trays 310 is connected to a water pipe 312, and the end of the water pipe 312 is connected to the water outlet of the water pump 308, and the surface of the water pipe 312 is connected to a plurality of groups of nozzles 313, and the flue gas after denitration passes through the denitration reactor 302. The nitrate reactor 302 can be transported to the inside of the box 305, and the flue gas flies to the discharge port 306 through the bottom of the box 305. During the process, the water pump 308 is started, and the air pressure generated by the internal impeller can transport the water in the water tank 307 to the inside of the water pipe 312. The water pipe 312 then diverts the water through the nozzle 313 to achieve the effect of spraying. The water can be sprayed on the surface of the limestone 311 to moisten it. When the moistened limestone 311 contacts the sulfur in the flue gas, it can react to produce calcium sulfite. After multiple reactions, the calcium sulfite can form gypsum and be stored in the storage box 309, thereby achieving the desulfurization effect of the flue gas and further improving the protection of the environment.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A furnace flue gas cooling device with a desulfurization and denitrification structure, comprising a flue pipe (1), a flue gas heat exchanger (2) is installed on the side of the flue pipe (1), and an exhaust pipe (3) is connected to the side of the flue gas heat exchanger (2). It is characterized by: The top and bottom of the flue gas heat exchanger (2) are both fixed with a first fixing block (201), the front of the first fixing block (201) is fixed with a fixing plate (202), a sliding groove (203) is provided through the surface of the fixing plate (202), and an extension mechanism is provided on the side of the flue gas heat exchanger (2), and the length of the outlet pipe (3) when connected to the pipeline can be adjusted by the extension mechanism; The side of the gas outlet pipe (3) is connected to an external pipe (301), the end of the external pipe (301) is connected to a denitration reactor (302), and a denitration mechanism is arranged inside the external pipe (301), and the denitration mechanism can be used to purify the nitrate contained in the flue gas.

2. The kiln flue gas cooling device with a desulfurization and denitrification structure according to claim 1 is characterized in that: The extension mechanism comprises a bellows (204), and the bellows (204) is connected between the flue gas heat exchanger (2) and the air outlet pipe (3), and second fixing blocks (205) are fixed to the top and bottom of the air outlet pipe (3).

3. The kiln flue gas cooling device with a desulfurization and denitrification structure according to claim 2 is characterized in that: A bolt (206) is fixed to the top of the air outlet pipe (3) near the second fixing block (205), and the bolt (206) penetrates and slides inside the slide groove (203), and a nut (207) is threadedly connected to the surface of the bolt (206).

4. The kiln flue gas cooling device with a desulfurization and denitrification structure according to claim 1 is characterized in that: The denitration mechanism comprises a storage tank (303), and the storage tank (303) is connected to the side of the denitration reactor (302), the output end of the storage tank (303) is connected to a denitration spray gun (304), and the denitration spray gun (304) is connected through the inside of the denitration reactor (302), and a desulfurization mechanism is arranged on the side of the denitration reactor (302).

5. The kiln flue gas cooling device with a desulfurization and denitrification structure according to claim 4 is characterized in that: The desulfurization mechanism comprises a box (305), and the box (305) is connected to the end of the gas outlet of the denitration reactor (302), the top of the box (305) is connected to a discharge port (306), and the side of the box (305) is connected to a water tank (307).

6. The kiln flue gas cooling device with a desulfurization and denitrification structure according to claim 5 is characterized in that: A water pump (308) is installed on the top of the water tank (307), a storage box (309) is connected to the bottom surface of the box body (305), and two groups of perforated trays (310) are connected to the inside of the box body (305).

7. The kiln flue gas cooling device with a desulfurization and denitrification structure according to claim 6 is characterized in that: The top of the perforated tray (310) is connected to limestone (311), the interior of the box (305) close to the perforated tray (310) is connected to a water pipe (312), and the end of the water pipe (312) is connected to the water outlet of the water pump (308), and the surface of the water pipe (312) is connected to multiple groups of nozzles (313).

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