CN213408243U

CN213408243U - Boiler flue gas denitration device capable of recovering heat

Info

Publication number: CN213408243U
Application number: CN202021993746.4U
Authority: CN
Inventors: 张卿; 李欣欣; 李占春; 张晓燕; 戴金殿; 葛龙; 郭姗姗; 宋振宏; 李曙光
Original assignee: Beijing Yutai Environmental Protection Engineering Co ltd
Current assignee: Beijing Yutai Environmental Protection Engineering Co ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-06-11
Anticipated expiration: 2030-09-14

Abstract

The utility model discloses a can retrieve thermal boiler flue gas denitration equipment, concretely relates to flue gas denitration technical field, including boiler, reacting furnace, catalyst board and heat recovery mechanism, a plurality of bleeder vents have been seted up on the catalyst board, be equipped with clean filtering mechanism between boiler and the reacting furnace, the spout has all been seted up to the inside front and back wall of reacting furnace, the inside slider that is equipped with of spout, the fixed baffle that is equipped with in catalyst board one side, clean filtering mechanism includes the rose box, the fixed filter screen that is equipped with on the rose box inner wall. The utility model discloses a set up clean filtering mechanism, can filter most smoke and dust in advance, effectually avoid gathering a large amount of smoke and dust on the catalyst board, and through setting up spout, slider and baffle, can take out clean up with the catalyst board at any time, the catalytic reaction that the catalyst board just can be fine always like this for the efficiency and the desorption rate of denitration keep higher state always.

Description

Boiler flue gas denitration device capable of recovering heat

Technical Field

The embodiment of the utility model provides a flue gas denitration technical field, concretely relates to can retrieve thermal boiler flue gas denitration equipment.

Background

The selective catalytic reduction technology (SCR) is the most widely applied flue gas denitration technology internationally at present, is basically applied to most power plants in national regions such as Japan, Europe, America and the like, has no by-products, does not form secondary pollution, and has the advantages of simple device structure, high removal efficiency (up to more than 90 percent), reliable operation, convenient maintenance and the like. The technical principle of the SCR is as follows: under the action of a catalyst, ammonia is sprayed into flue gas with the temperature of about 280-420 ℃, NOX is reduced into N2 and H2O, and a denitration device is basically arranged behind an economizer, namely a high-dust section.

But current boiler flue gas denitration equipment does not all install the filterable mechanism of smoke and dust, and this can make denitration equipment the inside gather a lot of smoke and dust, and the catalyst is fixed in the reacting furnace, when its surface gathers the smoke and dust, can influence catalytic reduction's efficiency, also can influence the effect of denitration.

SUMMERY OF THE UTILITY MODEL

For this reason, the embodiment of the utility model provides a can retrieve thermal boiler flue gas denitration device, through setting up clean filtering mechanism, can filter most smoke and dust in advance, effectually avoid gathering a large amount of smoke and dust on the catalyst board, and through setting up the spout, slider and baffle, can take out the clean up with the catalyst board at any time, the catalyst board just can be fine catalytic reaction always like this, make the efficiency and the desorption rate of denitration keep higher state always, in order to solve among the prior art because boiler flue gas denitration device does not all install the filterable mechanism of smoke and dust and lead to the inside of denitration device to gather a lot of smoke and dust, and the catalyst is fixed in the reacting furnace, when its surface gathers the smoke and dust, can influence catalytic reduction's efficiency, also can influence the problem of the effect of denitration.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: the utility model provides a can retrieve thermal boiler flue gas denitration device, includes boiler, reacting furnace, catalyst board and heat recovery mechanism, the reacting furnace is established in boiler one side, the catalyst board is established inside the reacting furnace, a plurality of bleeder vents have been seted up on the catalyst board, heat recovery mechanism establishes in the reacting furnace bottom, its characterized in that: a cleaning and filtering mechanism is arranged between the boiler and the reaction furnace, sliding chutes are formed in the front wall and the rear wall of the interior of the reaction furnace, sliding blocks are arranged in the sliding chutes, the two sliding blocks are fixedly connected with the front end and the rear end of the catalyst plate respectively, a baffle plate is fixedly arranged on one side of the catalyst plate, and the front end and the rear end of the baffle plate are connected with the front end and the rear end of the reaction furnace through hasps;

clean filtering mechanism includes the rose box, the fixed filter screen that is equipped with on the rose box inner wall, the fixed motor that is equipped with in rose box top, the inside movable block that is equipped with of rose box, the movable block is established in filter screen one side, the inside threaded rod that is equipped with of rose box, threaded rod one end run through movable block and rose box top and with the output shaft fixed connection of motor, threaded connection between threaded rod one end and the movable block, threaded rod one end is passed through the bearing with the rose box top and is rotated and be connected, the fixed high temperature resistant brush that is equipped with in movable block one side, high temperature resistant brush one side contacts with filter screen one side.

Further, a flue gas connecting pipe is fixedly arranged on one side of the boiler, one end of the flue gas connecting pipe is communicated with the interior of the boiler, the other end of the flue gas connecting pipe penetrates one side of the filter box and is communicated with the interior of the filter box, a flue gas inlet pipe is fixedly arranged on one side of the reaction furnace, one end of the flue gas inlet pipe penetrates one side of the reaction furnace and is communicated with the interior of the reaction furnace, and the other end of the flue gas inlet pipe penetrates the other side of the filter box and is communicated with the.

Furthermore, an ammonia gas inlet pipe is fixedly arranged at the top end of the reaction furnace, one end of the ammonia gas inlet pipe penetrates through the top end of the reaction furnace and is communicated with the inside of the reaction furnace, and a first valve is fixedly arranged on the ammonia gas inlet pipe.

Furthermore, a dust exhaust pipe is fixedly arranged at the bottom end of the filter box, one end of the dust exhaust pipe is communicated with the inside of the filter box, and a second valve is fixedly arranged on the dust exhaust pipe.

Further, the fixed guide bar that is equipped with in inside top of rose box, the movable block is run through to guide bar one end, the guide bar is established in the threaded rod front side, the threaded rod other end and the fixed stopper that is equipped with of guide bar one end.

Further, heat recovery mechanism includes flue gas outlet duct, the flue gas outlet duct is fixed to be established in the reacting furnace bottom, flue gas outlet duct one end is passed the reacting furnace bottom and is linked together with the reacting furnace is inside, the inside fixed a plurality of heat pipes that are equipped with of flue gas outlet duct, the heat pipe both ends all pass the flue gas outlet duct outer end and extend to the flue gas outlet duct outside, the fixed air connecting pipe that is equipped with in boiler one side, air connecting pipe one end is linked together with the boiler is inside, the air connecting pipe is established in dust exhaust bottom of tubes portion, the air connecting pipe other end and flue gas outlet duct outer end fixed connection, heat pipe one end is linked together with the air connecting pipe other end, the fixed air intake pipe that is equipped with in flue gas outlet.

Furthermore, a taking and placing opening is formed in the other side of the reaction furnace, a sealing gasket is fixedly arranged in the taking and placing opening, and the inner end of the sealing gasket is in contact with the outer end of the baffle.

Furthermore, a handle is fixedly arranged on one side of the baffle.

The embodiment of the utility model provides a have following advantage:

1. the utility model discloses a filter screen filters the smoke and dust on the filter screen, the output shaft of motor drives the threaded rod and rotates, the movable block moves downwards along with the rotation of threaded rod, the movable block drives high temperature resistant brush and moves downwards, high temperature resistant brush clears up the smoke and dust on the filter screen to the bottom of rose box, when the movable block arrives the bottom of threaded rod, make the output shaft of motor reverse rotation again, high temperature resistant brush can carry out the clearance back and forth to the filter screen like this, compared with the prior art, can filter most smoke and dust in advance, effectually avoid gathering a large amount of smoke and dust on the catalyst board;

2. the utility model discloses a pulling handle, handle drive baffle move right, and the baffle takes catalyst board and slider to move right along the spout, after pulling out the catalyst board inside the reacting furnace, with its surface clean up, then puts back the catalyst board inside the reacting furnace along the spout, compares with prior art, can take out the catalyst board clean up at any time, and the catalytic reaction that the catalyst board just can be fine always like this, makes the efficiency and the desorption rate of denitration keep higher state always;

3. the utility model discloses a flue gas after the denitration is discharged from flue gas outlet duct, gives the heat pipe with heat transfer during through the heat pipe, and the air gets into from the air intake pipe, and during through the heat pipe, the heat pipe gives the air with heat transfer, and the hot-air is compared with prior art through the inside that air connecting pipe got into the boiler, can utilize the heat recovery of flue gas.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic view of the overall structure provided by the present invention;

FIG. 2 is a left side sectional view of the cleaning and filtering mechanism according to the present invention;

fig. 3 is a schematic bottom sectional view of the cleaning and filtering mechanism of the present invention;

FIG. 4 is a schematic left-side sectional view of the reaction furnace provided by the present invention;

fig. 5 is an enlarged schematic structural diagram of a in fig. 1 according to the present invention;

in the figure: the device comprises a boiler 1, a reaction furnace 2, a filter box 3, a filter screen 4, a motor 5, a movable block 6, a threaded rod 7, a high-temperature-resistant brush 8, a catalyst plate 9, a sliding chute 10, a sliding block 11, a baffle 12, a flue gas connecting pipe 13, a flue gas inlet pipe 14, an ammonia gas inlet pipe 15, a dust exhaust pipe 16, a guide rod 17, a limiting block 18, a flue gas outlet pipe 19, a heat conducting pipe 20, an air connecting pipe 21, an air inlet pipe 22, a sealing gasket 23 and a handle 24.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the attached drawings 1-5 in the specification, the boiler flue gas denitration device capable of recovering heat in the embodiment includes a boiler 1, a reaction furnace 2, a catalyst plate 9 and a heat recovery mechanism, wherein the reaction furnace 2 is arranged on one side of the boiler 1, the catalyst plate 9 is arranged inside the reaction furnace 2, a plurality of air holes are formed in the catalyst plate 9, and the heat recovery mechanism is arranged at the bottom of the reaction furnace 2, and is characterized in that: a cleaning and filtering mechanism is arranged between the boiler 1 and the reaction furnace 2, sliding chutes 10 are formed in the front wall and the rear wall of the interior of the reaction furnace 2, sliding blocks 11 are arranged in the sliding chutes 10, the two sliding blocks 11 are respectively fixedly connected with the front end and the rear end of a catalyst plate 9, a baffle plate 12 is fixedly arranged on one side of the catalyst plate 9, and the front end and the rear end of the baffle plate 12 are connected with the front end and the rear end of the reaction furnace 2 through hasps;

clean filter mechanism includes rose box 3, the fixed filter screen 4 that is equipped with on the 3 inner walls of rose box, the fixed motor 5 that is equipped with in 3 tops of rose box, the inside movable block 6 that is equipped with of rose box, the movable block 6 is established in filter screen 4 one side, the inside threaded rod 7 that is equipped with of

rose box

3, 7 one ends of threaded rod run through

movable block

6 and 3 tops of rose box and with motor 5's output shaft fixed connection, threaded connection between 7 one ends of threaded rod and the

movable block

6, 7 one ends of threaded rod are passed through the bearing with 3 tops of rose box and are rotated and be connected, 6 one sides of movable block are fixed and are equipped with high temperature

resistant brush

8, 8 one side of high temperature resistant brush contact with 4 one sides of filter screen.

Further, a flue gas connecting pipe 13 is fixedly arranged on one side of the boiler 1, one end of the flue gas connecting pipe 13 is communicated with the inside of the boiler 1, the other end of the flue gas connecting pipe 13 penetrates through one side of the filter box 3 and is communicated with the inside of the filter box 3, a flue gas inlet pipe 14 is fixedly arranged on one side of the reaction furnace 2, one end of the flue gas inlet pipe 14 penetrates through one side of the reaction furnace 2 and is communicated with the inside of the reaction furnace 2, and the other end of the flue gas inlet pipe 14 penetrates through the other side of the filter box 3 and is communicated with the inside of the filter box 3, so that flue.

Further, an ammonia gas inlet pipe 15 is fixedly arranged at the top end of the reaction furnace 2, one end of the ammonia gas inlet pipe 15 penetrates through the top end of the reaction furnace 2 and is communicated with the inside of the reaction furnace 2, and a first valve is fixedly arranged on the ammonia gas inlet pipe 15, so that ammonia gas can enter the inside of the reaction furnace 2 conveniently.

Furthermore, a dust exhaust pipe 16 is fixedly arranged at the bottom end of the filter box 3, one end of the dust exhaust pipe 16 is communicated with the inside of the filter box 3, and a second valve is fixedly arranged on the dust exhaust pipe 16, so that smoke and dust can be conveniently exhausted.

Further, the fixed guide bar 17 that is equipped with in the inside top of rose box 3, the movable block 6 is run through to guide bar 17 one end, guide bar 17 is established in threaded rod 7 front side, the threaded rod 7 other end and the fixed stopper 18 that is equipped with of guide bar 17 one end are convenient for the direction of movable block 6 and prevent that it from dropping.

Further, the heat recovery mechanism comprises a flue gas outlet pipe 19, the flue gas outlet pipe 19 is fixedly arranged at the bottom end of the reaction furnace 2, one end of the flue gas outlet pipe 19 penetrates through the bottom end of the reaction furnace 2 and is communicated with the inside of the reaction furnace 2, a plurality of heat conduction pipes 20 are fixedly arranged inside the flue gas outlet pipe 19, two ends of each heat conduction pipe 20 penetrate through the outer end of the flue gas outlet pipe 19 and extend to the outer side of the flue gas outlet pipe 19, an air connection pipe 21 is fixedly arranged at one side of the boiler 1, one end of the air connection pipe 21 is communicated with the inside of the boiler 1, the air connection pipe 21 is arranged at the bottom of the dust exhaust pipe 16, the other end of the air connection pipe 21 is fixedly connected with the outer end of the flue gas outlet pipe 19, one end of each heat conduction pipe 20 is communicated with, the heat of the flue gas can be recycled.

Further, the other side of the reaction furnace 2 is provided with a taking and placing port, a sealing gasket 23 is fixedly arranged in the taking and placing port, the inner end of the sealing gasket 23 is in contact with the outer end of the baffle 12, and the flue gas is prevented from escaping.

Further, a handle 24 is fixedly arranged on one side of the baffle 12, so that the catalyst plate 9 can be conveniently taken and placed.

The implementation scenario is specifically as follows: flue gas enters the interior of the filter box 3 from the boiler 1 through the flue gas connecting pipe 13, enters the flue gas inlet pipe 14 after being filtered by the filter screen 4 and then enters the interior of the reaction furnace 2, ammonia enters the interior of the reaction furnace 2 from the ammonia gas inlet pipe 15 and meets the flue gas in the interior of the reaction furnace 2, then the reaction is carried out under the action of the catalyst plate 9 to remove nitre in the flue gas, the denitrated flue gas is discharged from the flue gas outlet pipe 19, the heat is transferred to the heat conduction pipe 20 when passing through the heat conduction pipe 20, the air enters from the air inlet pipe 22, the heat is transferred to the air by the heat conduction pipe 20, the hot air enters the interior of the boiler 1 through the air connecting pipe 21, meanwhile, the motor 5 is started, the output shaft of the motor 5 drives the threaded rod 7 to rotate, and the movable block 6 moves downwards along with the rotation of the threaded rod 7 due to the, the movable block 6 drives the high temperature resistant brush 8 to move downwards, the high temperature resistant brush 8 cleans smoke dust on the filter screen 4 to the bottom end of the filter box 3, when the movable block 6 reaches the bottom end of the threaded rod 7, the output shaft of the motor 5 rotates reversely, so the high temperature resistant brush 8 cleans the filter screen 4 back and forth, when the smoke dust in the filter box 3 accumulates to a certain amount, the smoke dust is discharged from the dust discharging pipe 16, after a certain period of time, after certain smoke dust accumulates on the catalyst plate 9, the handle 24 is pulled, the handle 24 drives the baffle 12 to move rightwards, the baffle 12 drives the catalyst plate 9 and the sliding block 11 to move rightwards along the sliding groove 10, when the catalyst plate 9 is pulled out of the inside of the reaction furnace 2, the surface of the catalyst plate is cleaned, and then the catalyst plate 9 is placed back to the inside of the reaction furnace 2 along the sliding groove 10, the utility model discloses a clean filtering mechanism is arranged, most of the smoke dust can be filtered in, effectual avoid catalyst board 9 to go up a large amount of smoke and dust of accumulational, and through setting up spout 10, slider 11 and baffle 12, can take out the sanitization with catalyst board 9 at any time, catalyst board 9 just can be fine catalytic reaction always like this, make the efficiency and the desorption rate of denitration keep higher state always, through setting up heat pipe 20, can utilize the heat recovery of flue gas, this embodiment has specifically solved among the prior art boiler flue gas denitration equipment and has not installed the filterable mechanism of smoke and dust, this can make the denitration equipment the inside gather a lot of smoke and dust, and the catalyst is fixed in the reacting furnace, when its surface gathers the smoke and dust, can influence catalytic reduction's efficiency, also can influence the problem of the effect of denitration.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The utility model provides a can retrieve thermal boiler flue gas denitration device, includes boiler (1), reacting furnace (2), catalyst board (9) and heat recovery mechanism, establish in boiler (1) one side reacting furnace (2), establish inside reacting furnace (2) catalyst board (9), a plurality of bleeder vents have been seted up on catalyst board (9), heat recovery mechanism establishes in reacting furnace (2) bottom, its characterized in that: a cleaning and filtering mechanism is arranged between the boiler (1) and the reaction furnace (2), sliding chutes (10) are formed in the front wall and the rear wall of the interior of the reaction furnace (2), sliding blocks (11) are arranged in the sliding chutes (10), the two sliding blocks (11) are respectively and fixedly connected with the front end and the rear end of the catalyst plate (9), a baffle (12) is fixedly arranged on one side of the catalyst plate (9), and the front end and the rear end of the baffle (12) are connected with the front end and the rear end of the reaction furnace (2) through hasps;

the cleaning and filtering mechanism comprises a filtering box (3), a filtering net (4) is fixedly arranged on the inner wall of the filtering box (3), the top end of the filter box (3) is fixedly provided with a motor (5), a movable block (6) is arranged inside the filter box (3), the movable block (6) is arranged at one side of the filter screen (4), a threaded rod (7) is arranged in the filter box (3), one end of the threaded rod (7) penetrates through the movable block (6) and the top end of the filter box (3) and is fixedly connected with an output shaft of the motor (5), one end of the threaded rod (7) is in threaded connection with the movable block (6), one end of the threaded rod (7) is rotatably connected with the top end of the filter box (3) through a bearing, one side of the movable block (6) is fixedly provided with a high-temperature-resistant brush (8), and one side of the high-temperature-resistant brush (8) is in contact with one side of the filter screen (4).

2. The boiler flue gas denitration device capable of recovering heat according to claim 1, characterized in that: boiler (1) one side is fixed and is equipped with flue gas connecting pipe (13), flue gas connecting pipe (13) one end is linked together with boiler (1) is inside, flue gas connecting pipe (13) other end passes rose box (3) one side and is linked together with rose box (3) is inside, fixed flue gas intake pipe (14) that is equipped with in reacting furnace (2) one side, flue gas intake pipe (14) one end is passed reacting furnace (2) one side and is linked together with reacting furnace (2) is inside, flue gas intake pipe (14) other end passes rose box (3) opposite side and is linked together with rose box (3) is inside.

3. The boiler flue gas denitration device capable of recovering heat according to claim 1, characterized in that: the reaction furnace (2) top is fixed and is equipped with ammonia intake pipe (15), ammonia intake pipe (15) one end is passed reaction furnace (2) top and is linked together with reaction furnace (2) inside, the fixed first valve that is equipped with on ammonia intake pipe (15).

4. The boiler flue gas denitration device capable of recovering heat according to claim 1, characterized in that: the dust exhaust device is characterized in that a dust exhaust pipe (16) is fixedly arranged at the bottom end of the filter box (3), one end of the dust exhaust pipe (16) is communicated with the interior of the filter box (3), and a second valve is fixedly arranged on the dust exhaust pipe (16).

5. The boiler flue gas denitration device capable of recovering heat according to claim 1, characterized in that: the inside top of rose box (3) is fixed and is equipped with guide bar (17), movable block (6) is run through to guide bar (17) one end, guide bar (17) are established in threaded rod (7) front side, the threaded rod (7) other end and guide bar (17) one end are fixed and are equipped with stopper (18).

6. The boiler flue gas denitration device capable of recovering heat according to claim 4, characterized in that: the heat recovery mechanism comprises a flue gas outlet pipe (19), the flue gas outlet pipe (19) is fixedly arranged at the bottom end of the reaction furnace (2), one end of the flue gas outlet pipe (19) penetrates through the bottom end of the reaction furnace (2) and is communicated with the inside of the reaction furnace (2), a plurality of heat conduction pipes (20) are fixedly arranged inside the flue gas outlet pipe (19), the two ends of each heat conduction pipe (20) penetrate through the outer end of the flue gas outlet pipe (19) and extend to the outer side of the flue gas outlet pipe (19), an air connection pipe (21) is fixedly arranged on one side of the boiler (1), one end of the air connection pipe (21) is communicated with the inside of the boiler (1), the air connection pipe (21) is arranged at the bottom of the dust exhaust pipe (16), the other end of the air connection pipe (21) is fixedly connected with the outer end of the flue gas, an air inlet pipe (22) is fixedly arranged at the outer end of the flue gas outlet pipe (19), and one end of the air inlet pipe (22) is communicated with the other end of the heat conducting pipe (20).

7. The boiler flue gas denitration device capable of recovering heat according to claim 1, characterized in that: the reaction furnace (2) opposite side has been seted up and has been got and put the mouth, get and put the mouth internal fixation and be equipped with sealed pad (23), sealed pad (23) inner contacts with baffle (12) outer end.

8. The boiler flue gas denitration device capable of recovering heat according to claim 1, characterized in that: and a handle (24) is fixedly arranged on one side of the baffle (12).