CN217568211U

CN217568211U - Intake air treatment device and denitration equipment

Info

Publication number: CN217568211U
Application number: CN202221204575.1U
Authority: CN
Inventors: 胡艳琼; 张剑北; 郭家秀; 刘勇军; 周泽江
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-10-14
Anticipated expiration: 2032-05-18

Abstract

The utility model discloses a processing apparatus and denitration device admit air has solved the easy technical problem of poisoning inactivation of catalyst among the prior art. The intake air processing device includes: the air conditioner comprises a shell, wherein an air inlet and an air outlet are formed in the shell; the particle interception component is used for intercepting particles in the flue gas to be denitrated; the particle interception assembly comprises a first interception mechanism, a second interception mechanism and a third interception mechanism which are sequentially arranged in the shell along the gas flowing direction; the ash bucket is arranged below the shell, and the particulate matter intercepted by the particle intercepting component falls into the ash bucket; the first blocking mechanism comprises a first baffle which is vertically placed in a natural state and forms a blocking surface matched with the section of the shell; under the pushing of the flue gas to be denitrated, the first baffle plate deforms and/or rotates to form a gas flow channel; the second intercepting mechanism comprises a second baffle plate obliquely arranged along the gas flowing direction; the third intercepting mechanism includes a filter screen.

Description

Intake air treatment device and denitration equipment

Technical Field

The utility model relates to a flue gas denitration's technical field particularly, relates to processing apparatus and denitration device admit air.

Background

The SCR denitration technology of the coal-fired flue gas in the power industry can meet the requirement of ultralow emission at present. The flue gas condition of the industrial furnace is severe, the flue gas temperature is low, the content of alkali metal and other components in ash is high, and the denitration catalyst is easy to be poisoned and inactivated, so that the flue gas emission of enterprises does not reach the standard, and the shutdown and production halt are caused. In the traditional denitration engineering, the denitration catalyst is difficult to replace after deactivation, so that the production stop period of an enterprise is prolonged.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides processing apparatus and denitration device admit air to solve the technical problem of catalyst easy poisoning inactivation among the prior art.

In order to achieve the above object, a first aspect of the present invention provides an air inlet processing device, which comprises:

the processing apparatus that admits air for treat that it treats denitration flue gas that gets into denitrification facility and carry out the preliminary treatment, include: the air inlet and the air outlet are arranged on the shell; the particle interception component is used for intercepting particles in the flue gas to be denitrated; the particle interception assembly comprises a first interception mechanism, a second interception mechanism and a third interception mechanism which are sequentially arranged in the shell along the gas flowing direction; the ash bucket is arranged below the shell, and the particulate matter intercepted by the particle intercepting component falls into the ash bucket; the first blocking mechanism comprises a first baffle which is vertically placed in a natural state and forms a blocking surface matched with the section of the shell; under the pushing of the flue gas to be denitrated, the first baffle plate deforms and/or rotates to form a gas flow channel; the second intercepting mechanism comprises a second baffle plate obliquely arranged along the gas flowing direction; the third intercepting mechanism includes a filter screen.

Therefore, under the coordination action of the first interception mechanism, the second interception mechanism and the third interception mechanism, most particles in the flue gas to be denitrated are intercepted, the particles are prevented from causing denitration catalyst poisoning, the regeneration frequency is reduced, and the service life of the denitration catalyst is prolonged remarkably.

As a further improvement of the first aspect of the present invention: the first baffle plates are at least two and are arranged along the length direction of the cross section of the shell; or, the first baffle is at least two and staggered up and down along the gas flow direction. Therefore, the first baffle plate can form a gas flow channel under the pushing of gas, intercept particles with larger sizes and avoid the mechanical abrasion of the particles on the rear-end equipment.

As a further improvement of the first aspect of the present invention: the second intercepting mechanism comprises two second baffle plates which are arranged at intervals, the upper end of one second baffle plate is fixed, the lower end of the other second baffle plate is fixed, and a bent gas flow channel is formed between the first baffle plate and the second baffle plate. From this, on the one hand, the extension treats the flow path of denitration flue gas, promotes the natural settling effect of particulate matter, and on the other hand, the second baffle also can intercept partial particulate matter. A second sheet-metal baffle is preferably used, which can be slightly bent under the gas flow in the direction of gas flow, thereby reducing the gas flow resistance.

As a further improvement of the first aspect of the present invention: the distance between the two second baffles is 500-1000 mm, and the included angle between the second baffles and the gas flowing direction is 45-75 degrees. Therefore, the interception effect on the particles is good.

As a further improvement of the first aspect of the present invention: the casing includes that the cross section is the body of rectangle and with the end cover of the end connection of body, the end cover is on a parallel with the gas flow direction, and at least one end cover can be dismantled with the body and be connected. Therefore, the parts in the shell can be overhauled and replaced by disassembling and assembling the end cover.

As a further improvement of the first aspect of the present invention: the particle intercepting assembly further comprises: the first guide rail is arranged on the upper plate body of the pipe body; the first support plate is inserted into the pipe body from the end part of the pipe body along the first guide rail; the second guide rail is arranged on the lower plate body of the pipe body; the second support plate is inserted into the pipe body from the end part of the pipe body along the second guide rail, and a first through hole is formed in the second support plate; the length of first backup pad and second backup pad and the length adaptation of body, second interception mechanism and third interception structure are located between first backup pad and the second backup pad. Therefore, the second intercepting mechanism and the third intercepting mechanism can be disassembled and assembled, and overhauling and maintenance are facilitated.

As a further improvement of the first aspect of the present invention: the shell also comprises an expansion section connected with the pipe body, and the air inlet is arranged on the expansion section; from this, the flue gas of treating denitration that flows in from the air inlet can be dispersed more evenly under the effect of expanding the section to promote particulate matter interception effect. And/or the first guide rail and the second guide rail are perpendicular to the gas flow direction; therefore, the shell space is saved, and the structure is more compact.

As a further improvement of the first aspect of the present invention: a second through hole is formed in the lower plate body of the pipe body; thereby, the particles are facilitated to fall into the ash hopper; the shell is provided with a pressure detector; therefore, the pressure of the flue gas to be denitrated in the shell can be monitored conveniently in real time, and the air tightness is ensured.

In order to realize the above object, the second aspect of the present invention provides a denitration apparatus, comprising:

denitration equipment, including the denitrification facility, be equipped with the denitration catalyst in the denitrification facility, still have above-mentioned first aspect the processing apparatus that admits air, treat denitration flue gas through admit air processing apparatus handle the back reentrant denitrification facility and carry out the denitration. During the application, carry out simple transformation to current denitration equipment and can install processing apparatus that admits air, have extremely strong practicality.

As a further improvement of the second aspect of the present invention: denitration equipment still has the main pipe of admitting air and inlet branch pipe, and denitrification facility has parallelly connected denitration unit, and inlet branch pipe and denitration unit's quantity adaptation, the processing apparatus that admits air locates on the main pipe of admitting air or inlet branch pipe. Therefore, the flue gas to be denitrated entering each denitration unit is effectively pretreated.

The present invention will be further described with reference to the accompanying drawings and the detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which form a part of the disclosure, are included to assist in understanding the disclosure, and the description provided herein and the accompanying drawings, which are related thereto, are intended to explain the disclosure, but do not constitute an undue limitation on the disclosure. In the drawings:

fig. 1 is a schematic structural diagram of a first embodiment of the air inlet treatment device and the denitration apparatus of the present invention.

Fig. 2 is a sectional view of a second embodiment of the intake air treatment apparatus and the denitration device according to the present invention.

Fig. 3 is an enlarged view of a second embodiment of the intake air treatment apparatus and the denitration device according to the present invention.

Fig. 4 is a schematic structural diagram of the first through hole or the second through hole in the first embodiment of the air inlet treatment device and the denitration apparatus of the present invention.

Fig. 5 is a schematic structural diagram of an embodiment of a first intercepting mechanism in a first embodiment of the air inlet treatment device and the denitration apparatus of the present invention.

Fig. 6 is a schematic structural view of another embodiment of the first intercepting means in the first embodiment of the intake air treatment apparatus and the denitration device of the present invention.

Fig. 7 is a schematic structural view of a second embodiment of the intake air treatment apparatus and the denitration device of the present invention.

The relevant references in the above figures are:

110-tube body, 111-upper plate body, 112-lower plate body, 120-end cover, 130-expansion section, 140-pressure detector, 210-first interception mechanism, 211-first baffle, 220-second interception mechanism, 230-third interception structure, 241-first guide rail, 242-first support plate, 251-transverse through hole, 252-longitudinal through hole, 243-second guide rail, 244-second support plate, 300-ash hopper, 310-discharge pipe, 320-discharge valve, 400-denitration unit, 410-catalyst box body, 510-main air inlet pipe, 520-branch air inlet pipe, 521-valve and 600-ammonia spraying mechanism.

Detailed Description

The present invention will be described more fully with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Before the present invention is described with reference to the accompanying drawings, it is to be noted that:

the technical solutions and features provided in the present invention in each part including the following description may be combined with each other without conflict.

Furthermore, the embodiments of the invention described in the following description are generally only some embodiments, but not all embodiments of the invention. Therefore, all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention shall fall within the protection scope of the present invention.

With respect to the terms and units of the present invention. The terms "comprising," "having," and any variations thereof in the description and claims of this invention and the related sections are intended to cover non-exclusive inclusions.

Fig. 1 is a perspective view of a first embodiment of an intake air treatment apparatus and a denitration device according to the present invention.

Fig. 2 is a sectional view of a second embodiment of the intake air treatment apparatus and the denitration device according to the present invention. Fig. 3 is an enlarged view of a second embodiment of the intake air treatment apparatus and the denitration device according to the present invention. Fig. 4 is a schematic structural diagram of the first through hole or the second through hole in the first embodiment of the air inlet treatment device and the denitration apparatus of the present invention. Fig. 5 is a schematic structural view of an embodiment of a first blocking mechanism in the first embodiment of the intake air treatment apparatus and the denitration device of the present invention. Fig. 6 is a schematic structural view of another embodiment of the first blocking mechanism according to the first embodiment of the present invention.

As shown in fig. 1 to 3, the denitration apparatus includes a denitration device, a main intake pipe 510, an intake branch pipe 520, and an intake air treatment device; the denitration device is provided with three denitration units 400 which are connected in parallel, the number of the air inlet branch pipes 520 and the number of the denitration units 400 are three, the air inlet treatment device is arranged on the air inlet main pipe 510, and flue gas to be denitrated in the air inlet main pipe 510 is treated by the air inlet treatment device and then is shunted to enter the air inlet branch pipes 520; each air inlet branch pipe 520 is provided with a valve 521 and an ammonia spraying mechanism 600, and the ammonia spraying mechanism 600 comprises an ammonia water conveying pipeline and an ammonia water atomizing nozzle; each denitration unit 400 is provided with four catalyst box bodies 410 connected in series, and a denitration catalyst is arranged in each catalyst box body 410; in specific implementation, the number of the intake manifold 520, the denitration unit 400, and the catalyst case 410 may be other values.

The processing device comprises a shell, a particle intercepting component and an ash bucket 300; the shell is provided with an air inlet, an air outlet and a pressure detector 140; the particle interception component is used for intercepting particles in the flue gas to be denitrated; the dust hopper 300 is arranged below the shell, and the particles intercepted by the particle intercepting component fall into the dust hopper 300.

The housing comprises a tube body 110 with a rectangular cross section and end caps 120 connected with the ends of the tube body 110, the end caps 120 are parallel to the gas flow direction, and the two end caps 120 are detachably connected with the tube body 110, preferably but not limited to bolt connection; the lower plate 112 of the tube 110 is provided with a second through hole. In order to improve the uniformity of the diffusion of the flue gas to be denitrated in the pipe body 110, the casing further comprises an expansion section 130 connected with the pipe body 110, and the air inlet is formed in the expansion section 130.

The particle intercepting component comprises a first intercepting mechanism 210, a second intercepting mechanism 220 and a third intercepting mechanism 230 which are sequentially arranged in the pipe body 110 along the gas flowing direction; for easy maintenance and repair, the particle intercepting assembly further includes a first guide rail 241, a first support plate 242, a second guide rail 243 and a second support plate 244, the first guide rail 241 is disposed on the upper plate 111 of the tube body 110, the first support plate 242 is inserted into the tube body 110 from the end of the tube body 110 along the first guide rail 241, the second guide rail 243 is disposed on the lower plate 112 of the tube body 110, the second support plate 244 is inserted into the tube body 110 from the end of the tube body 110 along the second guide rail 243, a first through hole is disposed on the second support plate 244, the lengths of the first support plate 242 and the second support plate 244 are adapted to the length of the tube body 110, and the second intercepting mechanism 220 and the third intercepting structure 230 are disposed between the first support plate 242 and the second support plate 244; the first guide rail 241 and the second guide rail 243 are perpendicular to the gas flow direction to make the apparatus more compact; the length of said first guide 241 and second guide 243 is adapted to the length of the tubular body 110, so that the flue gas to be denitrified can be prevented from passing through the tubular body 110 without being treated by the second intercepting means 220 and the third intercepting structure 230.

As shown in fig. 4, the first and second through holes include a transverse through hole 251 having an axis parallel to the gas flowing direction and a longitudinal through hole 252 having an axis perpendicular to the gas flowing direction, and the transverse through hole 251 is disposed in front of the longitudinal through hole 252, thereby facilitating the passage of particles and preventing or reducing the deposition of dust on the lower plate 112 and the second support plate 244 of the tube body 110.

The first blocking mechanism 210 comprises a first baffle 211, and the first baffle 211 is vertically arranged in a natural state and forms a blocking surface matched with the section of the shell; under the push of the flue gas to be denitrated, the first baffle 211 deforms and/or rotates to form a gas flow channel. The implementation of the first intercepting mechanism 210 may be, but is not limited to, in the following two ways: as shown in fig. 5 (front view), the first baffles 211 are at least two and are arranged along the length direction of the shell section; as shown in fig. 6 (side view), the first baffles 211 are at least two and are staggered up and down along the gas flow direction; the first blocking plate 211 may be a flexible plate, an upper end or a lower end of the flexible plate (for example, made of silicon rubber) is fastened to the housing, the first blocking plate 211 may be a rigid plate, and the upper end or the lower end of the rigid plate is connected to the housing through a hinge and a spring.

The second intercepting means 220 includes a second baffle plate disposed to be inclined in the gas flowing direction. In specific implementation, the second blocking mechanism 220 includes two second blocking plates disposed at intervals, wherein an upper end of one of the second blocking plates is fixed on the first supporting plate 242, a lower end of the other second blocking plate is fixed on the second supporting plate 244, and a curved gas flow channel is formed between the first blocking plate 211 and the second blocking plate; the distance between the two second baffles is 500-1000 mm, and the included angle between the second baffles and the gas flowing direction is 45-75 degrees.

The third intercepting mechanism includes a filter screen, the upper and lower ends of the filter screen are respectively connected with the first support plate 242 and the second support plate 244, and the filter screen is preferably, but not limited to, a screen with a mesh number of 100-300.

In order to facilitate the discharge of the ash accumulated in the ash hopper 300, a discharge pipe 310 is arranged below the ash hopper 300, and a discharge valve 320 is arranged on the discharge pipe 310.

In addition to the first embodiment, the intake air treatment apparatus and the denitration facility of the present embodiment have the following differences: as shown in fig. 7, the number of the intake air treatment devices is three and the intake air treatment devices are respectively provided on the three intake branch pipes 520.

The contents of the present invention have been explained above. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Based on the above description of the present invention, all other embodiments obtained by those skilled in the art without any creative work shall fall within the protection scope of the present invention.

Claims

1. The air inlet treatment device is used for pretreating the to-be-denitrated flue gas to be fed into the denitration device, and is characterized in that: the method comprises the following steps:

the air conditioner comprises a shell, wherein an air inlet and an air outlet are formed in the shell;

the particle interception component is used for intercepting particles in the flue gas to be denitrated; the particle interception assembly comprises a first interception mechanism (210), a second interception mechanism (220) and a third interception mechanism (230) which are sequentially arranged in the shell along the gas flowing direction;

the ash bucket (300) is arranged below the shell, and the particulate matters intercepted by the particle intercepting component fall into the ash bucket (300);

the first blocking mechanism (210) comprises a first baffle (211), and the first baffle (211) is vertically placed in a natural state and forms a blocking surface matched with the section of the shell; under the pushing of the flue gas to be denitrated, the first baffle (211) deforms and/or rotates to form a gas flow channel;

the second intercepting mechanism (220) comprises a second baffle plate obliquely arranged along the gas flow direction;

the third intercepting mechanism includes a filter screen.

2. The intake air treatment device of claim 1, wherein: the number of the first baffle plates (211) is at least two and the first baffle plates are arranged along the length direction of the cross section of the shell; or, the first baffle plates (211) are at least two and are arranged in a vertically staggered mode along the gas flowing direction.

3. The intake air treatment device of claim 1, wherein: the second intercepting mechanism (220) comprises two second baffle plates which are arranged at intervals, the upper end of one second baffle plate is fixed, the lower end of the other second baffle plate is fixed, and a bent gas flow channel is formed between the first baffle plate (211) and the second baffle plate.

4. The intake air treatment device according to claim 3, wherein: the distance between the two second baffles is 500-1000 mm, and the included angle between the second baffles and the gas flowing direction is 45-75 degrees.

5. The intake air treatment device of claim 1, wherein: the shell comprises a tube body (110) with a rectangular cross section and end covers (120) connected with the ends of the tube body (110), wherein the end covers (120) are parallel to the gas flowing direction, and at least one end cover (120) is detachably connected with the tube body (110).

6. The intake air treatment device of claim 5, wherein: the particle intercepting assembly further comprises:

the first guide rail (241), the first guide rail (241) is set on the upper plate (111) of the tube (110);

a first support plate (242), the first support plate (242) being inserted into the interior of the tube body (110) from the end of the tube body (110) along the first guide rail (241);

a second guide rail (243), wherein the second guide rail (243) is arranged on the lower plate body (112) of the pipe body (110);

a second support plate (244), wherein the second support plate (244) is inserted into the tube body (110) from the end part of the tube body (110) along a second guide rail (243), and a first through hole is arranged on the second support plate (244);

the lengths of the first support plate (242) and the second support plate (244) are matched with the length of the pipe body (110), and the second interception mechanism (220) and the third interception structure (230) are arranged between the first support plate (242) and the second support plate (244).

7. The intake air treatment device as recited in claim 6, wherein: the shell further comprises an expansion section (130) connected with the tube body (110), and the air inlet is formed in the expansion section (130); and/or the first guide rail (241) and the second guide rail (243) are perpendicular to the gas flow direction.

8. The intake air treatment device of claim 6, wherein: a second through hole is formed in the lower plate body (112) of the pipe body (110); the shell is provided with a pressure detector (140).

9. Denitration equipment, including denitrification facility, be equipped with denitration catalyst in the denitrification facility, its characterized in that: the denitration device is characterized by further comprising an inlet gas treatment device as set forth in any one of claims 1-8, wherein flue gas to be denitrated is treated by the inlet gas treatment device and then enters the denitration device for denitration.

10. The denitration apparatus of claim 9, wherein: the denitration device is also provided with a main air inlet pipe (510) and a branch air inlet pipe (520), the denitration device is provided with denitration units (400) which are connected in parallel, the number of the branch air inlet pipe (520) is matched with that of the denitration units (400), and the air inlet treatment device is arranged on the main air inlet pipe (510) or the branch air inlet pipe (520).