A back flushing device in an SCR denitration system

Abstract

The utility model discloses a kind of backflushing devices in SCR denitration system, it is related to air purification technical field.The backflushing device in the SCR denitration system, including mixing box, backflushing component and collection component, the inside of mixing box is equipped with mixing space;Backflushing component is located on the mixing box, and the backflushing component includes triangular tube, and triangular tube is located in the inside of mixing box.The backflushing device in the SCR denitration system, by triangular tube can achieve the effect of two birds with one stone, backflushing to catalyst micropore structure inside triangular tube, outside makes flue gas and ammonia gas mix, install this equipment before catalyst on reactor, in order to follow flue gas direction, the impact diffusion angle of the two equal sides intersection line of triangular tube as and flue gas contact mixes makes flue gas and ammonia gas mix before entering catalyst, and then flue gas improves the effect of denitration, again through the setting of inclined plate and collection hopper, flue gas impurities can be collected.

Description

Technical Field

[0001] This utility model relates to the field of air purification technology, and in particular to a backflushing device in an SCR denitrification system. Background Technology

[0002] During the denitrification process, the microporous structure of the catalyst in the reactor is easily blocked by impurities in the flue gas. Common methods include manual cleaning after the production line is shut down or cleaning with compressed air along the flue gas direction through the hand hole on the reactor during production. If cleaning is not done in time, it will lead to an increase in the load on the fan and poor denitrification effect. Utility Model Content

[0003] The purpose of this invention is to provide a backflushing device in an SCR denitrification system, which can solve the problem that failure to clean in time will lead to increased fan load and poor denitrification effect.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a backflush device in an SCR denitrification system, comprising a mixing chamber, a backflush assembly, and a collection assembly, wherein the mixing chamber has a mixing space inside; A backflush assembly is disposed on the mixing chamber, and the backflush assembly includes a triangular tube located inside the mixing chamber; A collection assembly is disposed on the mixing chamber, the collection assembly including an inclined plate located inside the mixing chamber.

[0005] Preferably, a first air inlet pipe is fixedly installed on the rear side of the mixing chamber, one end of which extends into the interior of the mixing chamber and is equipped with a one-way valve. An air outlet pipe is fixedly installed on the front side of the mixing chamber, one end of which extends into the interior of the mixing chamber and is equipped with a one-way valve. A second air inlet pipe is fixedly installed on one side of the mixing chamber, one end of which extends into the interior of the mixing chamber and is equipped with a one-way valve. An exhaust pipe is fixedly installed on the other side of the mixing chamber, one end of which extends into the interior of the mixing chamber.

[0006] Preferably, the backflushing assembly further includes a high-pressure blower, an air duct, a connecting pipe, and a blower head. Connecting pipes are fixedly installed on both the front and rear inner walls of the mixing chamber. There are two sets of connecting pipes. Triangular tubes are fixedly installed on the opposite sides of the two sets of connecting pipes. The connecting pipes communicate with the interior of the triangular tubes. A blower head is fixedly installed on the outer wall of the triangular tubes. The blower head communicates with the interior of the triangular tubes. A high-pressure blower is fixedly installed on the top of the mixing chamber. An air duct is fixedly installed at the output end of the high-pressure blower. One end of the connecting pipe extends to the front of the mixing chamber and is fixedly installed with the outer wall of the air duct. The air duct communicates with the connecting pipe.

[0007] Preferably, the triangular tube is triangular in shape, and a solenoid valve is provided on the connecting tube.

[0008] Preferably, the collection assembly includes a collection hopper and a discharge pipe. An inclined plate is fixedly installed on the inner top and inner bottom of the mixing box. The inclined plate is inclined. A collection hopper is fixedly installed on the bottom of the mixing box. A discharge pipe is fixedly installed on the bottom of the collection hopper. A shut-off valve is provided on the discharge pipe.

[0009] Preferably, the number of triangular tubes is eight groups, and each group of triangular tubes is provided with a ventilation opening.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: The backflushing device in this SCR denitrification system can achieve two functions in one go through the triangular tube. The inside of the triangular tube backflushes the microporous structure of the catalyst, while the outside mixes the flue gas and ammonia. This device is installed before the catalyst in the reactor. With the flue gas direction in mind, the intersection of the two equal sides of the triangular tube serves as the impact diffusion angle for contact and mixing with the flue gas, so that the flue gas before entering the catalyst is mixed with ammonia, thereby improving the denitrification effect of the flue gas. Furthermore, the setting of the inclined plate and the collection hopper can collect impurities in the flue gas. When the triangular tube backflushes, the impurities generated will be blocked by the inclined plate, and then the impurities will fall into the inside of the collection hopper for collection, and finally fall into the discharge pipe. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a perspective view of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a cross-sectional view of the mixing box of this utility model; Figure 4 This is a cross-sectional view of the collection hopper of this utility model; Figure 5 This is a perspective view of the triangular tube of this utility model.

[0012] Reference numerals: 1. Mixing box; 2. First air inlet pipe; 3. Second air inlet pipe; 4. Air outlet pipe; 5. Exhaust pipe; 6. Backflush assembly; 601. High-pressure blower; 602. Air duct; 603. Connecting pipe; 604. Triangular tube; 605. Blower head; 7. Collection assembly; 701. Inclined plate; 702. Collection hopper; 703. Discharge pipe. Detailed Implementation

[0013] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0014] Please see Figure 1-5 This utility model provides a technical solution: a backflush device in an SCR denitrification system, including a mixing box 1, a backflush component 6, and a collection component 7. The mixing box 1 has a mixing space inside. The backflush component 6 is disposed on the mixing box 1 and includes a triangular tube 604 located inside the mixing box 1. The collection component 7 is disposed on the mixing box 1 and includes an inclined plate 701 located inside the mixing box 1.

[0015] Furthermore, a first air inlet pipe 2 is fixedly installed on the rear side of the mixing chamber 1, with one end extending into the interior of the mixing chamber 1 and equipped with a one-way valve. An air outlet pipe 4 is fixedly installed on the front side of the mixing chamber 1, with one end extending into the interior of the mixing chamber 1 and equipped with a one-way valve. A second air inlet pipe 3 is fixedly installed on one side of the mixing chamber 1, with one end extending into the interior of the mixing chamber 1 and equipped with a one-way valve. An exhaust pipe 5 is fixedly installed on the other side of the mixing chamber 1, with one end extending into the interior of the mixing chamber 1. The backflushing assembly 6 also includes a high-pressure blower 601 and an air duct. 602, connecting pipe 603, and blower head 605: Connecting pipes 603 are fixedly installed on both the front and rear inner walls of the mixing box 1. There are two sets of connecting pipes 603. Triangular tubes 604 are fixedly installed on the opposite sides of the two sets of connecting pipes 603. The interiors of the connecting pipes 603 and the triangular tubes 604 are connected. Blower heads 605 are fixedly installed on the outer wall of the triangular tubes 604. Blower heads 605 are connected to the interior of the triangular tubes 604. A high-pressure blower 601 is fixedly installed on the top of the mixing box 1. A duct 602 is fixedly installed at the output end of the high-pressure blower 601. One end of the connecting pipe 603 extends to the front of the mixing box 1 and connects with the outer wall of the duct 602. The wall-mounted system includes a duct 602 connected to a connecting pipe 603, a triangular tube 604 arranged in a triangular shape, and a solenoid valve on the connecting pipe 603. The collection assembly 7 includes a collection hopper 702 and a discharge pipe 703. An inclined plate 701 is fixedly installed on the inner top and bottom of the mixing box 1, and the inclined plate 701 is inclined. A collection hopper 702 is fixedly installed at the bottom of the mixing box 1, and a discharge pipe 703 is fixedly installed at the bottom of the collection hopper 702. A shut-off valve is installed on the discharge pipe 703. There are eight sets of triangular tubes 604, with ventilation openings between each set. The triangular tubes 604 serve a dual purpose. The internal backflushing of the catalyst's microporous structure and the external mixing of flue gas and ammonia are achieved by installing this device before the catalyst in the reactor. The intersection of the two equal sides of the triangular tube 604, aligned with the flue gas direction, serves as the impact diffusion angle for mixing with the flue gas before it enters the catalyst, thereby improving the denitrification effect. The inclined plate 701 and the collection hopper 702 collect impurities in the flue gas. Impurities generated after the triangular tube 604 backflushing are blocked by the inclined plate 701 and then fall into the collection hopper 702 for collection. Finally, the impurities are discharged through the discharge pipe 703.

[0016] Working principle: The high-pressure blower 601 mentioned above is existing technology, so its internal structure and control method do not need to be described in detail. In use, flue gas is blown into the mixing box 1 through the second air inlet pipe 3, and then ammonia is blown into the mixing box 1 through the first air inlet pipe 2. After the flue gas and ammonia come into contact with the triangular tube 604, the flue gas and ammonia are fully mixed through the triangular tube 604. Then the mixed flue gas is discharged through the exhaust pipe 5. When backflushing is required, the high-pressure blower 601 is started. The high-pressure blower 601 blows air into the connecting pipe 603 and the triangular tube 604 through the air pipe 602. Then the air is blown out through the blower head 605 on the triangular tube 604, which blows away the impurities on the triangular tube 604. When the impurities move, they are blocked by the inclined plate 701 and then fall into the collection hopper 702. Finally, they are discharged through the discharge pipe 703. The backflushing air is blown out through the exhaust pipe 4.

[0017] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A backflush device in an SCR denitrification system, characterized in that, include: The mixing chamber (1) has a mixing space inside; Backflush assembly (6), which is disposed on the mixing chamber (1), the backflush assembly (6) includes a triangular tube (604) located inside the mixing chamber (1); A collection component (7) is disposed on the mixing tank (1), the collection component (7) including an inclined plate (701) located inside the mixing tank (1).

2. The backflush device in an SCR denitrification system according to claim 1, characterized in that: A first air inlet pipe (2) is fixedly installed on the rear side of the mixing box (1). One end of the first air inlet pipe (2) extends into the interior of the mixing box (1) and a one-way valve is provided on the first air inlet pipe (2). An air outlet pipe (4) is fixedly installed on the front side of the mixing box (1). One end of the air outlet pipe (4) extends into the interior of the mixing box (1) and a one-way valve is provided on the air outlet pipe (4). A second air inlet pipe (3) is fixedly installed on one side of the mixing box (1). One end of the second air inlet pipe (3) extends into the interior of the mixing box (1) and a one-way valve is provided on the second air inlet pipe (3). An exhaust pipe (5) is fixedly installed on the other side of the mixing box (1). One end of the exhaust pipe (5) extends into the interior of the mixing box (1).

3. The backflush device in an SCR denitrification system according to claim 2, characterized in that: The back-blowing assembly (6) also includes a high-pressure blower (601), a duct (602), a connecting pipe (603), and a blower head (605). The front inner wall and the rear inner wall of the mixing box (1) are both fixedly installed with connecting pipes (603). There are two sets of connecting pipes (603). The opposite sides of the two sets of connecting pipes (603) are fixedly installed with triangular tubes (604). The interior of the connecting pipes (603) and the triangular tubes (604) are connected. The outer wall of the triangular tubes (604) is fixedly installed with a blower head (605). The blower head (605) is connected with the interior of the triangular tubes (604). The top of the mixing box (1) is fixedly installed with a high-pressure blower (601). The output end of the high-pressure blower (601) is fixedly installed with a duct (602). One end of the connecting pipe (603) extends to the front of the mixing box (1) and is fixedly installed with the outer wall of the duct (602). The duct (602) is connected with the connecting pipe (603).

4. The backflush device in an SCR denitrification system according to claim 3, characterized in that: The triangular tube (604) is triangular in shape, and a solenoid valve is provided on the connecting pipe (603).

5. The backflush device in an SCR denitrification system according to claim 4, characterized in that: The collection assembly (7) includes a collection hopper (702) and a discharge pipe (703). An inclined plate (701) is fixedly installed on the top and bottom of the inner side of the mixing box (1). The inclined plate (701) is inclined. A collection hopper (702) is fixedly installed on the bottom of the mixing box (1). A discharge pipe (703) is fixedly installed on the bottom of the collection hopper (702). A shut-off valve is provided on the discharge pipe (703).

6. The backflush device in an SCR denitrification system according to claim 5, characterized in that: The number of triangular tubes (604) is eight, and each group of triangular tubes (604) is provided with a ventilation opening.

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