Kiln tail flue gas denitration structure

Abstract

The utility model relates to the technical field of tail gas treatment, and discloses a kiln tail flue gas denitration structure which comprises a flue gas pipeline, an absorption tower is fixedly mounted on one side of the flue gas pipeline, a mounting seat is fixedly mounted above the absorption tower, a connecting seat is fixedly mounted above the mounting seat, and the connecting seat is fixedly connected with the absorption tower. A concentration detector is fixedly mounted above the connecting seat, a heat exchanger is fixedly mounted below the flue gas pipeline, an inlet pipe is fixedly mounted on one side of the heat exchanger, guide blades are fixedly mounted on the two sides of the inner wall of the inlet pipe, and a connecting plate is fixedly mounted on one side of each guide blade; a cyclone dust collector is fixedly mounted at one end of the inlet pipe, an outlet pipe is fixedly mounted on one side of the cyclone dust collector, and a collecting tank is fixedly mounted in the outlet pipe. The detection probe of the concentration detector penetrates through the absorption tower, so that the concentration in the absorption tower can be conveniently detected, and the use performance of the kiln tail flue gas denitration structure is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a kiln tail flue gas denitration structure. Background Art

[0002] Cement is an important basic raw material for national economic construction. At present, there is no material that can replace its position at home and abroad. With the rapid development of my country's economy, as an important basic industry of the national economy, the cement industry has become an important symbol of the level of national economic and social development and comprehensive strength. At the same time, the total amount of nitrogen oxides emitted by the cement industry has increased year by year, and it has become the third largest nitrogen oxide emitter after thermal power industry and automobile exhaust emissions. As far as the cement industry is concerned, in addition to nitrogen oxides in cement kiln flue gas, pollutants in air pollution also include dust pollution, and its dust emissions account for about 40% of the total dust emissions of the national industrial industry. Therefore, denitrification and dust removal of cement kiln flue gas and reducing the emission of nitrogen oxides and dust in the cement industry are of great significance to improving air quality, protecting the environment and human health.

[0003] During the denitrification process of cement kiln tail gas, the flue gas comes out of the kiln and then passes through the desulfurization and denitrification device filled with solid desulfurizer to complete the desulfurization task. A section of ammonia-free denitrification catalyst is installed on the desulfurizer to complete the denitrification function. The sulfur- and nitrogen-containing flue gas passes through the desulfurization and denitrification tank, and the sulfur oxides and nitrogen oxides in the flue gas are effectively removed, meeting the requirements of the manufacturer and local environmental protection department, and then enters the chimney for discharge through the induced draft fan.

[0004] During the operation of the flue gas denitrification structure at the tail of the kiln, the heat exchanger and the electrostatic precipitator are connected to facilitate the transportation of flue gas dust to the electrostatic precipitator for further collection. However, the heat exchanger and the electrostatic precipitator are mostly connected by pipes, resulting in a single structure in the pipes, which reduces the efficiency of flue gas dust transportation. At the same time, the flue gas dust is discharged from the heat exchanger into the electrostatic precipitator, and the dust is not easy to collect, which reduces the separation and collection of flue gas dust and reduces the use effect of the flue gas denitrification structure at the tail of the kiln. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides a kiln tail flue gas denitrification structure, which has the advantages of adding a connecting structure between the heat exchanger and the electrostatic precipitator, so that the dust can be more fully separated and collected, and the use effect of the kiln tail flue gas denitrification structure is improved, thereby solving the above-mentioned technical problems.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the kiln tail flue gas denitrification structure comprises a flue gas duct for discharging the kiln tail flue gas, an absorption tower for absorbing flue gas dust is fixedly installed on one side of the flue gas duct, a mounting seat for cooperative installation is fixedly installed above the absorption tower, a connecting seat for connecting for cooperative use is fixedly installed above the mounting seat, a concentration detector for concentration detection is fixedly installed above the connecting seat, a heat exchanger for cooperative use is fixedly installed below the flue gas duct, an inlet pipe for dust entry is fixedly installed on one side of the heat exchanger, guide blades for guiding are fixedly installed on both sides of the inner wall of the inlet pipe, a connecting plate for connecting for cooperative guiding is fixedly installed on one side of the guide blade, a cyclone dust collector for cyclone dust removal is fixedly installed on one end of the inlet pipe, an outlet pipe for outlet is fixedly installed on one side of the cyclone dust collector, a collecting trough for collecting is fixedly installed inside the outlet pipe, a partition is fixedly installed inside the collecting trough, and an electrostatic precipitator for electrostatic precipitator is fixedly installed on one end of the outlet pipe.

[0009] As a preferred technical solution of the utility model, an opening is fixedly installed through the center of the mounting seat, and a sealing sleeve is fixedly installed through the center of the connecting seat; the sealing sleeve increases the installation sealing of the concentration detector.

[0010] As a preferred technical solution of the utility model, a guide sleeve is fixedly installed below the sealing sleeve, and the outer surface of the guide sleeve is fixedly installed on the inner wall of the opening; the guide sleeve and the sealing sleeve are made of silicone sealing material.

[0011] As a preferred technical solution of the utility model, a concentration detector is fixedly installed above the sealing sleeve, and one end of the guide sleeve is fixedly penetrated above the inner wall of the absorption tower; the concentration detector probe penetrates the guide sleeve and is connected in the absorption tower.

[0012] As a preferred technical solution of the utility model, an inlet is fixedly installed through the inner wall of the inlet pipe, and a discharge pipe is fixedly installed on the electrostatic precipitator; the discharge pipe is connected to a heat exchanger so that the heat exchanger and the SO absorption tower are connected and used in coordination.

[0013] As a preferred technical solution of the utility model, guide vanes are fixedly installed on both sides of the outer surface of the inlet, and the guide vanes are in a ")" shape; the guide vanes reduce the use space of the inner wall of one end of the inlet pipe.

[0014] As the preferred technical solution of the utility model, one end of the collection trough is connected to one side of the inner wall of the electrostatic precipitator, and the other end of the collection trough is connected to one side of the inner wall of the cyclone dust collector; the collection trough connects the electrostatic precipitator and the cyclone dust collector for coordinated use.

[0015] Compared with the prior art, the utility model provides a kiln tail flue gas denitrification structure, which has the following

[0016] Beneficial effects:

[0017] 1. The utility model installs the inlet pipe at the joint point of the heat exchanger and the cyclone dust collector, so that the guide blades are installed in the inlet pipe. The guide blades are used in conjunction with the connecting plates. The guide blades are used to better allow the airflow to enter the cyclone barrel, thereby improving the cyclone strength. At the same time, an outlet pipe is installed on one side of the cyclone dust collector, and a collecting trough is installed in the outlet pipe. The collecting trough captures and collects the dust. Then, the airflow is introduced into the electrostatic precipitator for multiple times, so that the dust can be more fully separated and collected, thereby improving the use effect of the kiln tail flue gas denitrification structure.

[0018] 2. The utility model connects the mounting base above the absorption tower, and the mounting base and the connecting base are fixedly connected. The connecting base is used to penetrate and install the concentration detector. The concentration detector is installed above the absorption tower, so that the concentration detector probe penetrates the absorption tower, which is convenient for concentration detection in the absorption tower and further increases the performance of the kiln tail flue gas denitrification structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the concentration detector of the utility model;

[0021] Figure 3 This is a schematic diagram of the inlet pipe of the utility model;

[0022] Figure 4 This is a schematic diagram of the outlet pipe of the utility model.

[0023] Among them: 1. Flue gas duct; 2. Absorption tower; 21. Heat exchanger; 3. Mounting seat; 31. Opening; 32. Connecting seat; 33. Sealing sleeve; 34. Guide sleeve; 35. Concentration detector; 4. Inlet pipe; 41. Inlet; 42. Guide blade; 43. Connecting plate; 5. Cyclone dust collector; 6. Outlet pipe; 61. Collecting tank; 62. Partition; 7. Electrostatic precipitator; 8. Exhaust pipe. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the implementation of the present utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0025] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Combined with Figure 1-Figure 4 In this embodiment, the kiln tail flue gas denitrification structure includes a flue gas duct 1, an absorption tower 2 is fixedly installed on one side of the flue gas duct 1, a mounting seat 3 is fixedly installed above the absorption tower 2, a connecting seat 32 is fixedly installed above the mounting seat 3, a concentration detector 35 is fixedly installed above the connecting seat 32, a heat exchanger 21 is fixedly installed below the flue gas duct 1, an inlet pipe 4 is fixedly installed on one side of the heat exchanger 21, guide blades 42 are fixedly installed on both sides of the inner wall of the inlet pipe 4, a connecting plate 43 is fixedly installed on one side of the guide blade 42, a cyclone dust collector 5 is fixedly installed at one end of the inlet pipe 4, an outlet pipe 6 is fixedly installed on one side of the cyclone dust collector 5, a collecting tank 61 is fixedly installed inside the outlet pipe 6, a partition 62 is fixedly installed inside the collecting tank 61, and an electrostatic precipitator 7 is fixedly installed at one end of the outlet pipe 6.

[0028] Specifically, by connecting the mounting seat 3 above the absorption tower 2, the mounting seat 3 is connected to the connecting seat 32, and the concentration detector 35 is installed above the connecting seat 32. The concentration detector 35 is used to detect the concentration in the absorption tower 2, which is convenient for spraying the ammonia water according to the concentration in the absorption tower 2. The spraying direction and spraying flow rate are conveniently increased for the denitrification of the flue gas at the kiln tail.

[0029] An opening 31 is fixedly installed through the center of the mounting seat 3 , and a sealing sleeve 33 is fixedly installed through the center of the connecting seat 32 .

[0030] A guide sleeve 34 is fixedly mounted below the sealing sleeve 33 , and an outer surface of the guide sleeve 34 is fixedly mounted on the inner wall of the opening 31 .

[0031] A concentration detector 35 is fixedly mounted above the sealing sleeve 33 , and one end of the guide sleeve 34 is fixedly passed through the upper part of the inner wall of the absorption tower 2 .

[0032] Specifically, the center of the mounting seat 3 passes through the opening 31, the center of the connecting seat 32 passes through the sealing sleeve 33, the sealing sleeve 33 and the opening 31 are connected and matched for use, the concentration detector 35 probe passes through the sealing sleeve 33 and is connected to the mounting seat 3 structure, so that the probe passes through the opening 31, and the edge of the sealing sleeve 33 increases the connection sealing between the concentration detector 35 and the structure, which is convenient for improving the concentration detection. The inlet 41 is installed on the inner wall of the inlet pipe 4.

[0033] An inlet 41 is fixedly installed through the inner wall of the inlet pipe 4 , and a discharge pipe 8 is fixedly installed on the electrostatic precipitator 7 .

[0034] Guide vanes 42 are fixedly mounted on both sides of the outer surface of the inlet 41 , and the guide vanes 42 are in a “ ” shape.

[0035] One end of the collecting groove 61 is connected to one side of the inner wall of the electrostatic precipitator 7 , and the other end of the collecting groove 61 is connected to one side of the inner wall of the cyclone dust collector 5 .

[0036] Specifically, an inlet 41 is installed on one side of the inner wall of the inlet pipe 4, and the inlet 41 is connected to the heat exchanger 21, so that the flue gas dust can be transported into the inlet pipe 4. One end of the inlet pipe 4 is connected to the cyclone dust collector 5, so that the flue gas dust can be transported into the cyclone dust collector 5. At the same time, the cyclone dust collector 5 is connected to the outlet pipe 6 on one side, and one end of the outlet pipe 6 is connected to the electrostatic precipitator 7, so that the flue gas dust can be transported into the electrostatic precipitator 7. The cyclone dust collector 5 and the electrostatic precipitator 7 are used to remove the flue gas dust, which can conveniently increase the dust removal effect and improve the use of the flue gas denitrification structure at the tail of the kiln.

[0037] Working principle: The flue gas duct 1 is connected to the boiler at the tail of the kiln, and one end of the flue gas duct 1 is connected to the absorption tower 2. The absorption tower 2 absorbs the flue gas dust at the tail of the kiln into the absorption tower 2 through the flue gas duct 1. At the same time, the absorption tower 2 and the boiler are connected to the heat exchanger 21 below in the flue gas duct 1. The mounting seat 3 is connected above the absorption tower 2. The top of the mounting seat 3 is fixed to the connecting seat 32. The center position of the mounting seat 3 passes through the opening 31. A sealing sleeve 33 is installed on the inner wall of the connecting seat 32. The sealing sleeve 33 is provided with a guide sleeve 34 below. The guide sleeve 34 is installed above the inner wall of the absorption tower 2 corresponding to the opening 31. A concentration detector 35 is installed above the connecting seat 32. The concentration detector 35 probe passes through the sealing sleeve 33 and the guide sleeve 34 and is connected to the top of the inside of the absorption tower 2, so that the concentration in the absorption tower 2 can be detected, which is convenient for controlling the spraying direction and spraying flow rate of ammonia water. The heat exchanger 21 is connected to the cyclone dust collector 5 through the inlet pipe 4, and the inlet 41 runs through the inlet pipe 4. The inlet 41 connects the heat exchanger 21 and the inlet pipe 4, so that the flue gas dust is transported to the inlet pipe 4. The outer side of the inlet 41 is fixedly connected to the guide blade 42. The guide blade 42 is used with a connecting plate 43. The guide blade 42 and the connecting plate 43 guide the flue gas dust to one end of the cyclone dust collector 5. One end of the cyclone dust collector 5 is connected to the outlet pipe 6. The inner wall of the outlet pipe 6 runs through the collecting tank 61. The cyclone dust collector 5 is connected to the electrostatic precipitator 7 through the collecting tank 61. The collecting tank 61 transports the flue gas dust to the electrostatic precipitator 7 for dust removal processing, which conveniently improves the efficiency of flue gas dust removal. One end of the electrostatic precipitator 7 is connected to the exhaust pipe 8. The exhaust pipe 8 absorbs and discharges SO to other equipment for processing, which is convenient for the use of the kiln tail flue gas denitrification structure.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A kiln tail flue gas denitrification structure, comprising a flue gas duct (1), an absorption tower (2) fixedly installed on one side of the flue gas duct (1), characterized in that: A mounting seat (3) is fixedly mounted above the absorption tower (2), a connecting seat (32) is fixedly mounted above the mounting seat (3), a concentration detector (35) is fixedly mounted above the connecting seat (32), a heat exchanger (21) is fixedly mounted below the flue gas duct (1), an inlet pipe (4) is fixedly mounted on one side of the heat exchanger (21), guide vanes (42) are fixedly mounted on both sides of the inner wall of the inlet pipe (4), a connecting plate (43) is fixedly mounted on one side of the guide vanes (42), a cyclone dust collector (5) is fixedly mounted on one end of the inlet pipe (4), an outlet pipe (6) is fixedly mounted on one side of the cyclone dust collector (5), a collecting tank (61) is fixedly mounted inside the outlet pipe (6), a partition (62) is fixedly mounted inside the collecting tank (61), and an electrostatic precipitator (7) is fixedly mounted on one end of the outlet pipe (6).

2. A kiln tail flue gas denitrification structure according to claim 1, characterized in that: An opening (31) is fixedly installed through the center of the mounting seat (3), and a sealing sleeve (33) is fixedly installed through the center of the connecting seat (32).

3. A kiln tail flue gas denitrification structure according to claim 2, characterized in that: A guide sleeve (34) is fixedly mounted below the sealing sleeve (33), and the outer surface of the guide sleeve (34) is fixedly mounted on the inner wall of the opening (31).

4. A kiln tail flue gas denitrification structure according to claim 3, characterized in that: A concentration detector (35) is fixedly mounted above the sealing sleeve (33), and one end of the guide sleeve (34) is fixedly passed through the upper part of the inner wall of the absorption tower (2).

5. The kiln tail flue gas denitrification structure according to claim 1, characterized in that: An inlet (41) is fixedly installed through the inner wall of the inlet pipe (4), and a discharge pipe (8) is fixedly installed on the electrostatic precipitator (7).

6. A kiln tail flue gas denitrification structure according to claim 5, characterized in that: Guide vanes (42) are fixedly mounted on both sides of the outer surface of the inlet (41), and the guide vanes (42) are in a ")" shape.

7. The kiln tail flue gas denitrification structure according to claim 1, characterized in that: One end of the collecting trough (61) is connected to one side of the inner wall of the electrostatic precipitator (7), and the other end of the collecting trough (61) is connected to one side of the inner wall of the cyclone dust collector (5).

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