CN115400589A

CN115400589A - Boiler workshop is with smoke and dust treatment environmental protection equipment that has SOx/NOx control

Info

Publication number: CN115400589A
Application number: CN202211236652.6A
Authority: CN
Inventors: 成正平
Original assignee: Chaohu City Tiancheng Environmental Protection Machinery Co ltd
Current assignee: Chaohu City Tiancheng Environmental Protection Machinery Co ltd
Priority date: 2022-10-10
Filing date: 2022-10-10
Publication date: 2022-11-29

Abstract

The application discloses a flue dust treatment environment-friendly device with desulfurization and denitrification functions for a boiler workshop, which relates to the technical field of flue gas treatment and comprises a denitration tower, an electrostatic dust collector, a desulfurization tower and a chimney, wherein the denitration tower, the electrostatic dust collector, the desulfurization tower and the chimney are sequentially communicated through a pipeline in the flow direction of flue gas, and a detachable catalyst assembly is arranged in the middle of the denitration tower; the technical key points are that the catalyst component is designed on the denitration tower, compared with the traditional catalyst structure, the catalyst component in the denitration tower can be replaced in time, meanwhile, a user can increase or reduce the number of the catalyst plates according to actual conditions, the catalyst plates do not need to be assembled or disassembled by screws, and the denitration tower is quick and convenient to assemble; adopt serial-type desulfurizing tower structure, set up spray assembly and the backward flow unit that is convection type distribution from top to bottom in the desulfurizing tower, the backward flow unit can make the flue gas upstream, makes its abundant contact with spray assembly spun liquid, guarantees that the sulfur dioxide composition in the flue gas is fully absorbed, greatly increased dust collection efficiency.

Description

Boiler workshop is with smoke and dust treatment environmental protection equipment that has SOx/NOx control

Technical Field

The invention belongs to the technical field of flue gas treatment, and particularly relates to a flue gas treatment environment-friendly device with desulfurization and denitrification functions for a boiler workshop.

Background

In a boiler plant, a large amount of flue gas is generated by incineration, and the kinds of gaseous pollutants in the flue gas of the incinerator are various, such as SOx, COX, NOX, HCI, HF, dioxin-like (PCDDs) substances and the like. Wherein: SOx is mainly derived from waste paper and kitchen waste; HCl is mainly derived from waste plastics; NOx mainly comes from nitrogen in the air and kitchen waste; dioxin substances, such as waste plastics and waste medicines which can be sourced from the raw materials, or precursor substances of the dioxin substances are generated in an incinerator in the burning process or are generated outside the incinerator under specific conditions (300-500 ℃); the amount of slag produced and the nature of the slag in the incineration treatment of solid wastes are related to the type of solid wastes, the incineration technique, the level of control, and the like.

The flue gas treatment equipment effectively treats toxic and harmful substances contained in flue gas to below a specified concentration, and avoids the undesirable phenomena of corrosion or blockage of the equipment; flue gas treatment equipment generally applied to waste incineration plants is divided into two major types, namely dust removal equipment and acid gas removal equipment; at present, with the improvement of the environmental quality requirement of people, most waste incineration plants are additionally provided with equipment for adsorbing heavy metal by activated carbon in the flue gas treatment process; the flue gas treatment equipment mainly comprises a flue gas desulfurization tower, a flue gas washing tower, an absorption medium transmission pipe network, a chimney, a flue and the like, and is mainly applied to the electric power industry, the chemical industry, the coking industry, the metallurgical industry, the manufacturing industry with self-contained boilers and the like.

The following technical problems arise in the specific flue gas treatment:

firstly, a catalyst structure is arranged in a traditional flue gas denitration tower and is used for generating nitrogen and water from nitrogen oxides and ammonia under the catalytic action of a catalytic substance, the traditional catalyst structure adopts a double-layer structure, screws need to be dismantled by means of tools during disassembly and assembly, and time and labor are wasted during replacement of an internal catalyst plate, which is very inconvenient;

secondly, a spraying assembly can be arranged in the traditional flue gas desulfurization tower, however, rising flue gas can not be fully contacted with sprayed liquid, so that the dust removal effect is poor, and the dust removal efficiency is insufficient.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a flue dust treatment environment-friendly device with desulfurization and denitrification functions for a boiler workshop, which solves the problems in the prior art.

(II) technical scheme

In order to realize the purpose, the invention is realized by the following technical scheme:

a flue dust treatment environment-friendly device with desulfurization and denitrification functions for a boiler workshop comprises a denitration tower, an electrostatic dust collector, a desulfurization tower and a chimney, wherein the denitration tower, the electrostatic dust collector, the desulfurization tower and the chimney are sequentially communicated through a pipeline in a flue gas flowing direction, and a detachable catalyst assembly is installed in the middle of the denitration tower; the desulfurizing tower comprises a first tower and a second tower which are connected in series, and a spraying assembly and a reflux unit which are distributed in an up-down manner are arranged in each of the first tower and the second tower;

foretell spray set is used for the liquid of desulfurization of spout downwards, and the backward flow unit then promotes the flue gas upstream for flue gas and the full contact of desulfurized liquid also can accelerate the cooling of flue gas when increasing desulfurization efficiency.

Preferably, the catalyst assembly comprises an outer cover body and at least two groups of drum mechanisms, wherein a rotating motor is arranged above the outer cover body and used for driving the drum mechanisms to rotate, and a cover door is arranged on the outer cover body; a plurality of layers of catalyst plates are carried in the rotary drum mechanism, and a gap is formed in the surface of the denitration tower for the clamping of a single rotary drum mechanism; the drum mechanism comprises two sleeves with semicircular sections, two groups of the sleeves which are symmetrically distributed are connected through an elastic piece (the elastic piece at the position can be a spring), and the inner walls of the sleeves are provided with grooves for clamping the catalyst plates; the rotating motor is remotely controlled through a PLC226 controller, the rotating angle of the rotating motor is 180 degrees each time, and the rotating motor is fixed after reaching 180 degrees.

Above-mentioned design catalyst assembly on denitration tower, compare in traditional catalyst structure, catalyst assembly in this application can carry out timely change, and the user can increase or reduce catalyst plate itself according to actual conditions simultaneously, need not the dismouting screw during the assembly catalyst plate, assembles swiftly, convenient.

Preferably, the first tower and the second tower have the same internal structure, and water tanks are arranged below the first tower and the second tower and used for receiving liquid sprayed by the spraying assembly.

Preferably, the spraying assembly comprises a plurality of spraying pipes and a plurality of spray heads, the plurality of spray heads are positioned on the spraying pipes of two adjacent layers, and the plurality of spray heads are distributed in a staggered manner; the spray head is spirally connected with the spray pipe, and the direction of the medium sprayed by the spray head is vertical and downward.

Preferably, the reflow unit comprises two groups of screen plates and a plurality of reflow fans arranged on the surfaces of the screen plates; the screen plate is fixedly connected with the inner wall of the desulfurizing tower; on the two layers of the screen plates which are adjacent up and down, the backflow fans are distributed in a staggered mode; the backflow fan is detachably connected with the screen plate, and the direction of airflow generated by the backflow fan is vertical to the upward direction.

The desulfurization tower structure adopting the serial connection type is characterized in that the spray assembly and the reflux unit which are distributed in an up-and-down convection manner are arranged in the desulfurization tower, and the reflux unit can promote the flue gas to flow upwards to be fully contacted with liquid sprayed by the spray assembly, so that sulfur dioxide in the flue gas is fully absorbed, the dust removal efficiency is greatly increased, and the cooling rate of the flue gas is accelerated;

the reflux unit of bilayer formula can avoid some flue gas to get into the desulfurizing tower below from the reflux unit of traditional individual layer.

Preferably, a drainage pipe group is further arranged between the gas inlet of the denitration tower and the gas outlet of the desulfurization tower, and the drainage pipe group is used for heating gas discharged from the desulfurization tower; the drainage pipe group comprises a smoke inlet pipe, a heat preservation outer pipe and a smoke outlet pipe which are sequentially communicated in the smoke flowing direction; wherein the smoke inlet pipe and the smoke outlet pipe are parallel to each other; the outer heat-insulating pipe is sleeved on an air outlet pipeline of the desulfurizing tower;

the above-mentioned flue gas that sets up the drainage nest of tubes will not pass through the processing is exported, accomplishes the heating process to the flue gas in getting into the chimney, has replaced traditional heater, prevents that the chimney from being corroded, and the flue gas can scatter and disappear a large amount of heats at the in-process through the drainage nest of tubes simultaneously, accomplishes the preliminary cooling processing to the flue gas.

In summary, the invention includes at least one of the following beneficial effects:

firstly, compared with the traditional catalyst structure, the catalyst assembly is designed on the denitration tower, so that the catalyst assembly can be replaced in time, meanwhile, a user can increase or reduce the number of the catalyst plates according to the actual situation, the screws are not required to be disassembled and assembled when the catalyst plates are assembled, and the assembly is rapid and convenient;

secondly, the invention adopts a serial-type desulfurizing tower structure, the spraying component and the backflow unit which are distributed in an up-down convection mode are arranged in the desulfurizing tower, the backflow unit can promote the flue gas to flow upwards, so that the flue gas is fully contacted with liquid sprayed by the spraying component, the sulfur dioxide component in the flue gas is fully absorbed, the dust removal efficiency is greatly increased, and the double-layer backflow unit can prevent part of the flue gas from entering the lower part of the desulfurizing tower from the single-layer backflow unit.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a portion of the present invention;

FIG. 3 is a schematic diagram of the catalyst assembly structure of the present invention;

FIG. 4 is a sectional view showing the internal structure of a desulfurizing tower according to the present invention;

fig. 5 is a schematic structural diagram of the reflow machine set of the invention.

Reference numerals are as follows: 1. a denitration tower; 2. an electrostatic precipitator; 3. a desulfurizing tower; 31. a first tower; 32. a second tower; 4. a chimney; 5. a drainage tube set; 51. a smoke inlet pipe; 52. discharging the smoke tube; 53. a heat-insulating outer pipe; 6. an outer cover body; 7. a cover door; 8. a sleeve; 9. a catalyst plate; 10. a rotating electric machine; 11. a notch; 12. a spray assembly; 13. a spray pipe; 14. a spray head; 15. a reflux unit; 151. a screen plate; 152. a return fan; 16. a water tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention. In addition, for the convenience of description, the terms "upper", "lower", "left" and "right" are used to refer to the same direction as the upper, lower, left, right, etc. of the drawings, and the terms "first", "second", etc. are used for descriptive distinction and have no special meaning.

Example 1:

the embodiment provides a specific structure of the whole environment-friendly equipment, and as shown in fig. 1-5, the environment-friendly equipment for treating flue dust with desulfurization and denitrification for a boiler workshop comprises a denitrification tower 1, an electrostatic dust collector 2, a desulfurization tower 3 and a chimney 4 which are sequentially communicated through pipelines in the flowing direction of flue gas,

the middle part of the denitration tower 1 is provided with a detachable catalyst component;

the desulfurizing tower 3 comprises a first tower 31 and a second tower 32 which are connected in series, and the first tower 31 and the second tower 32 are internally provided with a spraying assembly 12 and a reflux unit 15 which are distributed in an up-down manner.

The flow direction of the flue gas is specifically as follows:

firstly, the waste gas enters the denitration tower 1 for denitration treatment, then enters the electrostatic dust collector 2 for electrostatic dust collection, then enters the desulfurization tower 3 for desulfurization treatment, and finally is discharged from the chimney 4.

In some examples, the catalyst assembly comprises an outer cover body 6 and two sets of rotating drum mechanisms, wherein a rotating motor 10 is installed above the outer cover body 6 and used for driving the rotating drum mechanisms to rotate, and a cover door 7 is arranged on the outer cover body 6; a plurality of layers of catalyst plates 9 are carried in the rotary drum mechanism, a gap 11 is arranged on the surface of the denitration tower 1 for the single rotary drum mechanism to be clamped in, a metal ring can be welded on the upper surface of each sleeve 8, the metal ring is in an inverted round table shape, after the rotary drum mechanism is clamped in the gap 11, the upper surface of the metal ring is tightly attached to the inner wall of the gap 11 when the metal ring expands under the principle of thermal expansion and cold contraction due to overhigh temperature of flue gas in a flue, so that the gap generated between the gap 11 and the metal ring is completely sealed, and the flue gas is prevented from leaking from the gap,

when the replacement and adjustment are carried out, a certain time can be waited for, and the metal ring is cooled and then drives the rotating motor 10 to work.

The rotary drum mechanism comprises two sleeves 8 with semicircular sections, the two groups of sleeves 8 which are symmetrically distributed are connected through an elastic piece, the inner wall of each sleeve 8 is provided with a groove for clamping the catalyst plate 9, the two groups of sleeves 8 are also under the action of the elastic restoring force of the elastic piece in a normal state, and the two groups of sleeves 8 are close to each other and are of a hollow cylindrical structure.

When the denitration tower is used specifically, a user can control the rotating motor 10 to drive the rotating drum mechanisms to rotate, so that one group of rotating drum mechanisms are aligned with the notch on the denitration tower 1 until the rotating drum mechanisms completely enter the notch;

when the catalyst plates 9 in the drum mechanism need to be replaced, the user can open the cover door 3 on the outer cover body 6, remove the catalyst plates 9 in the unused drum mechanism 9,

the specific dismounting mode is as follows:

the movable sleeve 8 is held by hands, so that the two sleeves 8 are separated, the catalyst plate 9 between the sleeves 8 after separation can automatically drop into the outer cover body 6, the cover door 7 is opened, the catalyst plate 9 can be taken out, then the new catalyst plate 9 is replaced, and after the catalyst plate is assembled to the original position, the stability of the position of the catalyst plate 9 can be ensured by means of the elastic restoring force of the elastic piece.

By adopting the technical scheme:

design catalyst assembly on denitration tower 1, compare in traditional catalyst structure, catalyst assembly in this application can carry out timely change, and the user can increase or reduce catalyst plate 9 itself according to actual conditions simultaneously, need not the dismouting screw during assembly catalyst plate 9, assembles swiftly, convenient.

Example 2:

based on embodiment 1, the specific structure of the desulfurization tower is provided in this embodiment, as shown in fig. 4-5, the spray assembly 12 includes a plurality of spray pipes 13 and a plurality of spray heads 14, which are located on the spray pipes 13 of two adjacent layers, and the spray heads 14 are distributed in a staggered manner; the spray head 14 is spirally connected with the spray pipe 13, and the direction of the medium sprayed by the spray head 14 is vertical downward.

In some examples, the reflow oven assembly 15 includes at least two sets of screens 151 and a plurality of reflow fans 152 mounted on the surfaces of the screens 151; wherein, the screen 151 is fixedly connected with the inner wall of the desulfurizing tower 3; on the two layers of screen plates 151 adjacent up and down, the reflux fans 152 are distributed in a staggered manner; the backflow fan 152 is detachably connected to the screen 151, and the airflow generated by the backflow fan 152 is vertically upward.

In specific operation, the backflow fan 152 generates a vertically upward airflow, and the liquid sprayed by the plurality of spray heads 14 is vertically downward, so that a troposphere is formed, and the flue gas is ensured to be fully contacted with the liquid.

By adopting the technical scheme:

adopt serial-type desulfurizing tower 3 structure, set up in desulfurizing tower 3 and be spray set 12 and the backward flow unit 15 of upper and lower STREAMING distribution, backward flow unit 15 can make the flue gas upstream, makes its and spray set 12 spun liquid fully contact, guarantees that the sulfur dioxide composition in the flue gas is fully absorbed, greatly increased dust collection efficiency, the backward flow unit 15 of double-deck formula can avoid partial flue gas to get into the desulfurizing tower below from the 15 backward flow units of individual layer.

Example 3:

based on embodiment 1, this embodiment provides a specific structure of the drainage tube group, and as shown in fig. 1 and 2, a drainage tube group 5 is further installed between the air inlet of the denitration tower 1 and the air outlet of the desulfurization tower 3, and the drainage tube group 5 is used for heating the gas discharged through the desulfurization tower 3.

The drainage tube group 5 comprises a smoke inlet tube 51, a heat preservation outer tube 52 and a smoke outlet tube 53 which are sequentially communicated in the smoke flowing direction; wherein, the smoke inlet pipe 51 and the smoke outlet pipe 53 are parallel to each other; the heat-insulating outer pipe 52 is sleeved on the air outlet pipeline of the desulfurizing tower 3; in addition, a plurality of heat dissipation fins can be arranged in the heat preservation outer pipe 52, so that heat can be gathered in the heat preservation outer pipe 52, and the heating treatment of the flue gas entering the chimney 4 is completed.

By adopting the technical scheme:

this application is through setting up drainage nest of tubes 5, exports the flue gas that will not handle, accomplishes the heating process to the flue gas in getting into the chimney, has replaced traditional heater, prevents that the chimney from being corroded, and the flue gas can scatter and disappear a large amount of heats at the in-process through drainage nest of tubes 5 simultaneously, accomplishes the preliminary cooling processing to the flue gas.

The foregoing is a further detailed description of the invention in connection with specific preferred embodiments and it is not intended to limit the invention to the specific embodiments described. For those skilled in the art to which the invention pertains, numerous simple deductions or substitutions may be made without departing from the spirit of the invention, which shall be deemed to belong to the scope of the invention.

Claims

1. The utility model provides a boiler workshop is with smoke and dust treatment environmental protection equipment that has SOx/NOx control, includes according to the flue gas flow direction, through denitration tower (1), electrostatic precipitator (2), desulfurizing tower (3) and chimney (4) that the pipeline communicates in proper order, its characterized in that:

the middle part of the denitration tower (1) is provided with a detachable catalyst component;

the desulfurizing tower (3) comprises a first tower (31) and a second tower (32) which are connected in series, and a spraying assembly (12) and a reflux unit (15) which are distributed in an up-down manner are arranged in the first tower (31) and the second tower (32).

2. The environment-friendly desulfurization and denitrification flue dust treatment equipment for the boiler workshop as set forth in claim 1, wherein: the catalyst component comprises an outer cover body (6) and at least two groups of rotating drum mechanisms,

a rotating motor (10) is mounted above the outer cover body (6) and used for driving the rotating drum mechanism to rotate, and a cover door (7) is arranged on the outer cover body (6);

the denitration tower is characterized in that a plurality of layers of catalyst plates (9) are carried in the rotary drum mechanism, and a gap (11) is formed in the surface of the denitration tower (1) and is used for clamping a single rotary drum mechanism.

3. The environment-friendly flue dust treatment equipment with desulfurization and denitrification function for the boiler workshop as set forth in claim 2, wherein: the drum mechanism comprises two sleeves (8) with semicircular sections, the two symmetrically-distributed sleeves (8) are connected through elastic pieces, and grooves are formed in the inner walls of the sleeves (8) and used for clamping the catalyst plates (9).

4. The environment-friendly desulfurization and denitrification flue dust treatment equipment for the boiler workshop as set forth in claim 1, wherein: the internal structures of the first tower (31) and the second tower (32) are the same, and water tanks (16) are arranged below the first tower (31) and the second tower (32).

5. The environment-friendly desulfurization and denitrification flue dust treatment equipment for the boiler workshop as set forth in claim 1, wherein: the spraying assembly (12) comprises a plurality of spraying pipes (13) and a plurality of spray heads (14), and is positioned on the upper layer and the lower layer of the spraying pipes (13), and the spray heads (14) are distributed in a staggered manner.

6. The environment-friendly desulfurization and denitrification flue dust treatment equipment for the boiler workshop as set forth in claim 5, wherein: the spray head (14) is spirally connected with the spray pipe (13), and the direction of the medium sprayed by the spray head (14) is vertical and downward.

7. The environment-friendly desulfurization and denitrification flue dust treatment equipment for the boiler workshop as set forth in claim 1, wherein: the reflow unit (15) comprises at least two groups of screen plates (151) and a plurality of reflow fans (152) arranged on the surfaces of the screen plates (151);

wherein the screen plate (151) is fixedly connected with the inner wall of the desulfurizing tower (3);

the backflow fans (152) are distributed on the two layers of the screen plates (151) which are adjacent up and down in a staggered mode.

8. The environment-friendly desulfurization and denitrification flue dust treatment equipment for the boiler workshop as set forth in claim 7, wherein: the backflow fan (152) is detachably connected with the screen plate (151), and the direction of airflow generated by the backflow fan (152) is vertical to the upward direction.

9. The environment-friendly desulfurization and denitrification flue dust treatment equipment for the boiler workshop as set forth in claim 1, wherein: still install drainage nest of tubes (5) between the air inlet of denitration tower (1) and the gas outlet of desulfurizing tower (3), and drainage nest of tubes (5) are used for heating through desulfurizing tower (3) exhaust gas.

10. The environment-friendly flue dust treatment equipment with desulfurization and denitrification function for the boiler workshop as recited in claim 9, wherein: the drainage pipe group (5) comprises a smoke inlet pipe (51), a heat preservation outer pipe (52) and a smoke outlet pipe (53) which are sequentially communicated in the smoke flowing direction;

wherein the smoke inlet pipe (51) and the smoke outlet pipe (53) are parallel to each other;

the heat-insulating outer pipe (52) is sleeved on the air outlet pipeline of the desulfurizing tower (3).