CN111617611A - Energy-saving environment-friendly desulfurization, denitrification and dust removal device and treatment method - Google Patents

Energy-saving environment-friendly desulfurization, denitrification and dust removal device and treatment method Download PDF

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CN111617611A
CN111617611A CN202010550139.9A CN202010550139A CN111617611A CN 111617611 A CN111617611 A CN 111617611A CN 202010550139 A CN202010550139 A CN 202010550139A CN 111617611 A CN111617611 A CN 111617611A
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bin
dust removal
reaction tube
denitrification
pipe
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潘帅
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75Multi-step processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/06Spray cleaning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26Drying gases or vapours
    • B01D53/265Drying gases or vapours by refrigeration (condensation)
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/508Sulfur oxides by treating the gases with solids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/54Nitrogen compounds
    • B01D53/56Nitrogen oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/10Oxidants
    • B01D2251/104Ozone
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

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  • Chemical Kinetics & Catalysis (AREA)
  • Environmental & Geological Engineering (AREA)
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Abstract

The invention discloses an energy-saving environment-friendly desulfurization, denitrification and dust removal device and a treatment method, wherein the right end of an air inlet channel is connected with a denitrification reaction tube, an ozone generator is arranged at the left lower part of the denitrification reaction tube, a stirring motor is arranged at the outer part of the right side of the denitrification reaction tube, an air diffusion tube is arranged in the denitrification reaction tube, the ozone generator is connected with the air diffusion tube, and a stirring motor shaft extends into the denitrification reaction tube and is connected withBe equipped with the multiunit stirring rake, denitration reaction tube intercommunication has the storehouse of removing dust, be equipped with in the storehouse of removing dust shower and shower down and go up the shower and all be connected with first connecting pipe with shower down, during first connecting pipe lower extreme stretched into the tank, the tank outer left side was equipped with flocculation agitator motor, the flocculation motor shaft stretches into in the tank and is equipped with multiunit flocculation stirring rake, dust removal storehouse left side middle part has the cooling bin through the passageway pipe intercommunication, the cooling bin is connected with the sulphur removal storehouse. The invention can remove or reduce SO generated in the coal burning process2、NOxAnd dust, thereby effectively protecting the environment. The invention is suitable for being widely applied to the treatment of the coal combustion exhaust flue gas.

Description

Energy-saving environment-friendly desulfurization, denitrification and dust removal device and treatment method
Technical Field
The invention relates to the technical field of flue gas treatment equipment, in particular to an energy-saving environment-friendly desulfurization, denitrification and dust removal device and a treatment method.
Background
China has abundant coal resources and is a main energy source in China. However, the flue gas discharged by coal combustion contains sulfur oxide SOx(mainly comprising: SO)2、SO3) And nitrogen oxide NOx(mainly comprising NO, NO)2、N2O3、N2O4、N2O5) In which SO2NO and NO2Is a main component of air pollution and a main substance forming acid rain, seriously pollutes the environment, harms the normal health and life of people and livestock, falls to the ground along with rain water, can damage the pH value of the soil environment and seriously influences the growth of ground crops.
Disclosure of Invention
The invention aims to solve the technical problem of providing an energy-saving environment-friendly desulfurization, denitrification and dust removal device and a treatment method, which can solve the problems in the prior art.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an energy-saving environment-friendly desulfurization, denitrification and dust removal device comprises an air inlet channel, a denitrification reaction tube, a dust removal bin, a cooling bin and a sulfur removal bin, wherein the right end of the air inlet channel is connected with the denitrification reaction tube, an ozone generator is arranged below the left side of the denitrification reaction tube, a stirring motor is arranged outside the right side of the denitrification reaction tube, a gas diffusion tube is arranged in the denitrification reaction tube, a plurality of groups of gas diffusion holes are arranged on the gas diffusion tube, the ozone generator is connected with the gas diffusion tube, the stirring motor is connected with a stirring motor shaft, the stirring motor shaft penetrates through the right side wall of the denitrification reaction tube and then extends into the denitrification reaction tube, a plurality of groups of stirring paddles are arranged on the stirring motor shaft, the dust removal bin is communicated with the lower part of the denitrification reaction tube, a dust removal partition plate is fixed on the upper part in the dust removal bin, a lower spray pipe is arranged between the dedusting partition plate and the water storage tank, a plurality of groups of upper spray heads and lower spray heads are respectively arranged on the upper spray pipe and the lower spray pipe, the upper spray pipe and the lower spray pipe are both connected with a first connecting pipe, the lower end of the first connecting pipe extends into the water storage tank, a water suction pump is arranged at the lower end of the first connecting pipe, a flocculation stirring motor is arranged at the left side outside the water storage tank, a flocculating agent is added inside the water storage tank, the flocculation stirring motor is connected with a flocculation motor shaft, the flocculation motor shaft penetrates through the left side wall of the water storage tank and then extends into the water storage tank, a plurality of groups of flocculation stirring paddles are arranged on the flocculation motor shaft, the middle part of the left side of the dedusting bin is communicated with the cooling bin through a channel pipe, a partition plate I and a partition plate II are arranged in the cooling bin, the right end of the, the utility model discloses a desulfurization device, including baffle one, baffle two, cooling storehouse, the baffle is provided with the wet return, the wet return other end with the tank is connected, the cooling storehouse with the desulfurization storehouse is connected through the second connecting pipe, be equipped with ventilative baffle, top in the desulfurization storehouse and purify the export, the lime slaking piece has been placed on ventilative baffle upper portion, the desulfurization storehouse outside is equipped with the bao guan, the bao guan left side be equipped with the pipe that advances that the intake duct is connected, the right side be equipped with the exit tube that the intake duct is connected, advance intraductal control valve that is equipped with.
And a temperature sensor for detecting temperature is arranged inside the sulfur removal bin as a limit.
As another limitation, the temperature inside the tube is 130 ℃ to 150 ℃.
By way of limitation, the temperature inside the tube is 140 ℃.
As another limitation, a sewage outlet is arranged at the right side of the bottom of the water storage tank.
As another limitation, a flocculating agent filling pipe is arranged above the right side of the dust removal bin.
As another limitation, an openable and closable filling opening is arranged above the ventilating partition plate and on the side wall of the sulfur removal bin.
A treatment method of an energy-saving environment-friendly desulfurization, denitrification and dust removal device is applied, and comprises the following steps:
s1, ozone denitration: air is fed from the air inlet channel, ozone is generated by an ozone generator and then is injected into the denitration reaction tube through the air diffusing tube, nitrogen dioxide and oxygen are generated by reaction of the ozone and nitric oxide in smoke dust in the denitration reaction tube, the ozone and the nitrogen dioxide react to generate nitrate and oxygen, the nitrogen dioxide and the nitrate react to generate dinitrogen pentoxide, meanwhile, the stirring motor drives the stirring motor shaft to rotate, and a plurality of groups of stirring paddles arranged on the stirring motor shaft can accelerate gas mixing and pressurize the inlet air;
s2, denitration and dust removal: gas after reaction is injected into the dust removal bin, water is sprayed under the action of the upper spray pipe and the lower spray pipe, dinitrogen pentoxide reacts with water to generate nitric acid, meanwhile, dust particles in smoke dust are absorbed together by the water and fall into the water storage tank, a flocculating agent added into the water storage tank can perform flocculating settling and acid-base neutralization on harmful substances, and a flocculating stirring paddle in the water storage tank can accelerate a flocculating process;
s3, cooling and dehumidifying: the gas after denitration and dust removal enters a cooling bin for condensation and dehumidification, water drops are gathered at the bottom of the cooling bin and are injected into the dust removal bin again for recycling under the action of a return water pump;
s4, sulfur removal: the gas through cooling and dehumidification is injected into the desulfurization bin from the second connecting pipe, reacts with the slaked lime piece in the desulfurization bin, is discharged from the purification outlet after removing sulfides, and simultaneously heats the reaction area of the desulfurization bin in a process of introducing waste gas into the ladle from the air inlet passage through the inlet pipe, and the heated waste gas flows back into the air inlet passage from the outlet pipe.
Due to the adoption of the design, compared with the prior art, the invention has the technical progress that:
(1) according to the energy-saving environment-friendly desulfurization, denitrification and dust removal device, the denitrification reaction tube is arranged, the ozone generator can convey ozone into the air diffusing tube of the denitrification reaction tube after running, the ozone is diffused through the multiple groups of air diffusing holes, the ozone reacts with nitric oxide in smoke dust to generate nitrogen dioxide and oxygen, the ozone reacts with the nitrogen dioxide to generate nitrate and oxygen, and the nitrogen dioxide reacts with the nitrate to generate dinitrogen pentoxide; meanwhile, in order to improve the reaction effect, a stirring motor shaft is arranged in the denitration reaction tube, the stirring motor drives the stirring motor shaft to rotate, and a plurality of groups of stirring paddles arranged on the stirring motor shaft can accelerate gas mixing, so that the reaction effect is improved; the stirring motor can realize stirring and air inlet pressurization simultaneously, so that energy is saved;
(2) according to the energy-saving environment-friendly desulfurization, denitrification and dust removal device, the dust removal bin is arranged, gas moves to the right and left under the obstruction of the dust removal partition plate, in the process, dinitrogen pentoxide reacts with water sprayed by the upper spray head and the lower spray head to generate nitric acid, and meanwhile, dust particles in smoke dust are absorbed by the water sprayed by the upper spray head and the lower spray head and fall into the water storage tank; a flocculating agent can be added into the water storage tank to perform flocculation sedimentation and acid-base neutralization on harmful substances, so that water can be recycled, and water resources are saved;
(3) according to the energy-saving environment-friendly desulfurization, denitrification and dust removal device, the desulfurization bin is arranged, the temperature of gas condensed and dewatered by the cooling bin is low, the gas is heated by the wrapping pipe, the optimal reaction temperature can be reached, the temperature is detected by the temperature sensor, the entering amount of hot gas is controlled by the control valve, the reaction area is heated by using waste gas, and the purified flue gas flows out of the purification outlet;
(4) when the energy-saving environment-friendly desulfurization, denitrification and dust removal device is used, firstly, air is fed from the air inlet channel, the ozone generator generates ozone, the ozone is injected into the denitrification reaction tube through the air diffusing tube, the ozone reacts with nitric oxide in smoke dust in the denitrification reaction tube to generate nitrogen dioxide and oxygen, the ozone reacts with the nitrogen dioxide to generate nitrate and oxygen, the nitrogen dioxide reacts with the nitrate to generate dinitrogen pentoxide, meanwhile, the stirring motor drives the stirring motor shaft to rotate, and a plurality of groups of stirring paddles arranged on the stirring motor shaft can accelerate the mixing of the air and pressurize the fed air; gas after reaction is injected into the dust removal bin, water is sprayed under the action of the upper spray pipe and the lower spray pipe, dinitrogen pentoxide reacts with water to generate nitric acid, meanwhile, dust particles in smoke dust are absorbed together by the water and fall into the water storage tank, a flocculating agent added into the water storage tank can perform flocculating settling and acid-base neutralization on harmful substances, and a flocculating stirring paddle in the water storage tank can accelerate a flocculating process; the gas after denitration and dust removal enters a cooling bin for condensation and dehumidification, water drops are gathered at the bottom of the cooling bin and are injected into the dust removal bin again for recycling under the action of a return water pump; the gas through cooling and dehumidification is injected into the desulfurization bin from the second connecting pipe, reacts with the slaked lime piece in the desulfurization bin, is discharged from the purification outlet after removing sulfides, and simultaneously heats the reaction area of the desulfurization bin in a process of introducing waste gas into the ladle from the air inlet passage through the inlet pipe, and the heated waste gas flows back into the air inlet passage from the outlet pipe.
In conclusion, the denitration reaction tube, the dust removal bin, the cooling bin and the sulfur removal bin are arranged, SO that SO generated in the coal burning process can be removed or reduced2、NOxAnd dust, thereby effectively protecting the environment. The invention is suitable for being widely applied to the treatment of the coal combustion exhaust flue gas.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic structural diagram of an energy-saving, environment-friendly desulfurization, denitrification and dust removal device in embodiment 1 of the invention;
FIG. 2 is a flow chart of a treatment method of the energy-saving, environment-friendly desulfurization, denitrification and dust removal device in embodiment 2 of the invention.
In the figure: 1. an air inlet channel; 2. a denitration reaction tube; 21. an ozone generator; 22. an air diffusing pipe; 221. air diffusing holes; 23. a stirring motor; 231. a stirring motor shaft; 232. a stirring paddle; 3. a dust removal bin; 31. a dust removal partition plate; 32. a water storage tank; 321. a waste outlet; 33. an upper spray pipe; 331. an upper spray head; 34. a lower spray pipe; 341. a lower nozzle; 35. a water suction pump; 351. a first connecting pipe; 36. a flocculation stirring motor; 361. a flocculation motor shaft; 362. a flocculation stirring paddle; 37. a passage tube; 38. a flocculant filling pipe; 4. a cooling bin; 411. a first clapboard; 412. a second clapboard; 42. a water return pump; 43. a water return pipe; 44. a second connecting pipe; 5. a sulfur removal bin; 51. a breathable partition; 52. slaking lime blocks; 53. a filling opening; 54. wrapping a pipe; 541. feeding a pipe; 542. a control valve; 543. discharging a pipe; 55. a temperature sensor; 56. and a purification outlet.
Detailed Description
The invention is further illustrated below with reference to the figures and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.
Example 1
As shown in fig. 1, an energy-saving and environment-friendly desulfurization, denitrification and dust removal device according to embodiment 1 comprises an inlet duct 1, a denitrification reaction tube 2, a dust removal bin 3, a cooling bin 4 and a sulfur removal bin 5, wherein the right end of the inlet duct 1 is connected with the denitrification reaction tube 2, an ozone generator 21 is arranged at the left lower part of the denitrification reaction tube 2, a stirring motor 23 is arranged outside the right side of the denitrification reaction tube 2, an air diffusing tube 22 is arranged in the denitrification reaction tube 2, a plurality of groups of air diffusing holes 221 are arranged on the air diffusing tube 22, the ozone generator 21 is connected with the air diffusing tube 22, the stirring motor 23 is connected with a stirring motor shaft 231, the stirring motor shaft 231 penetrates through the right side wall of the denitrification reaction tube 2 and then extends into the denitrification reaction tube 2, a plurality of groups of stirring paddles 232 are arranged on the stirring motor shaft 231, the dust removal bin 3 is communicated with the right lower part, The lower part is provided with a water storage tank 32, in the dust removal bin 3 and in be equipped with spray pipe 33 above the dust removal baffle 31, the dust removal baffle 31 with be provided with down spray pipe 34 between the water storage tank 32, go up spray pipe 33 with be equipped with multiunit top shower 331 and lower shower 341 on the spray pipe 34 respectively down, go up spray pipe 33 with shower 34 all is connected with first connecting pipe 351 down, first connecting pipe 351 lower extreme stretches into in the water storage tank 32 and the lower tip is equipped with suction pump 35, the outside left side of water storage tank 32 is equipped with flocculation agitator motor 36, the inside flocculating agent that has added, flocculation agitator motor 36 is connected with flocculation motor shaft 361, flocculation motor shaft 361 runs through behind the left side wall of water storage tank 32 and stretches into in the water storage tank 32, be equipped with multiunit flocculation stirring rake 362 on the motor shaft 361, except that the left side middle part of dust removal bin 3 has through the passageway 37 intercommunication cooling bin 4, a first partition plate 411 and a second partition plate 412 are arranged in the cooling bin 4, the right end of the first partition plate 411 is fixedly connected with the right side wall of the cooling bin 4, the left end of the second partition plate 412 is fixedly connected with the left side wall of the cooling bin 4, the first partition plate 411 and the second partition plate 412 enable a rotary channel to be formed in the cooling bin 4 so as to extend a cooling path, a water return pipe 43 is arranged at the bottom of the cooling bin 4, a water return pump 42 is arranged in the water return pipe 43, the other end of the water return pipe 43 is connected with the water storage tank 32, the cooling bin 4 is connected with the sulfur removal bin 5 through a second connecting pipe 44, a ventilating partition plate 51 is arranged in the sulfur removal bin 5, a purification outlet 56 is arranged at the top of the sulfur removal bin 5, a slaked lime block 52 is placed at the upper part of the ventilating partition plate 51, a wrapping pipe 54 is arranged on the outer side of the sulfur removal bin 5, a control valve 542 is provided in the inlet pipe 541.
Thus, by arranging the denitration reaction tube 2, the ozone generator 21 can convey ozone into the air diffusion tube 22 of the denitration reaction tube 2 after operation, and the ozone is diffused through the plurality of groups of air diffusion holes 221, the ozone reacts with nitric oxide in smoke dust to generate nitrogen dioxide and oxygen, the ozone reacts with the nitrogen dioxide to generate nitrate and oxygen, and the nitrogen dioxide reacts with the nitrate to generate dinitrogen pentoxide; meanwhile, in order to improve the reaction effect, a stirring motor shaft 231 is arranged in the denitration reaction tube 2, the stirring motor 23 drives the stirring motor shaft 231 to rotate, and a plurality of groups of stirring paddles 232 arranged on the stirring motor shaft 231 can accelerate gas mixing, so that the reaction effect is improved; the stirring motor 23 can simultaneously realize stirring and air inlet pressurization, so that energy is saved; moreover, by arranging the dust removal bin 3, the gas moves to the right and left under the obstruction of the dust removal partition plate 31, in the process, the dinitrogen pentoxide reacts with the water sprayed by the upper spray head 331 and the lower spray head 341 to generate nitric acid, and meanwhile, the water sprayed by the upper spray head 331 and the lower spray head 341 absorbs dust particles in the smoke dust together and falls into the water storage tank 32; a flocculating agent can be added into the water storage tank 32 to perform flocculation sedimentation and acid-base neutralization on harmful substances, so that water can be recycled, and water resources are saved; simultaneously, through setting up sulphur removal storehouse 5, the gas temperature through cooling storehouse 4 condensation dewatering is low, through the heating of peridium pipe 54, can reach optimum reaction temperature, controls steam admission volume through control valve 542, utilizes waste gas to heat the reaction zone, and the flue gas after the purification flows out from purifying outlet 56.
When the energy-saving environment-friendly desulfurization, denitrification and dust removal device in the embodiment 1 is used, firstly, air is introduced from the air inlet channel 1, ozone is generated by the ozone generator 21 and then injected into the denitrification reaction tube 2 through the air diffusing tube 22, nitrogen dioxide and oxygen are generated in the denitrification reaction tube 2 by reacting with nitric oxide in smoke dust, ozone is then reacted with nitrogen dioxide to generate nitrate and oxygen, nitrogen dioxide and nitrate react to generate dinitrogen pentoxide, meanwhile, the stirring motor 23 drives the stirring motor shaft 231 to rotate, and a plurality of groups of stirring paddles 232 arranged on the stirring motor shaft 231 can accelerate gas mixing and pressurize the inlet air; gas after reaction is injected into the dust removal bin 3, water is sprayed under the action of the upper spray pipe 33 and the lower spray pipe 34, dinitrogen pentoxide reacts with water to generate nitric acid, meanwhile, dust particles in smoke dust are absorbed by the water and fall into the water storage tank 32, a flocculating agent added into the water storage tank 32 can perform flocculating settling and acid-base neutralization on harmful substances, and a flocculating stirring paddle 362 in the water storage tank 32 can accelerate a flocculating process; the denitrated and dedusted gas enters the cooling bin 4 to be condensed and dehumidified, and water drops are gathered at the bottom of the cooling bin 4 and are injected into the dedusting bin 3 again under the action of the water return pump 42 for recycling; the cooled and dehumidified gas is injected into the sulfur removal bin 5 from the second connecting pipe 44, reacts with the slaked lime block 52 in the sulfur removal bin 5, is discharged from the purification outlet 56 after sulfide is removed, simultaneously is introduced from the air inlet channel 1 through the inlet pipe 541, enters the ladle pipe 54 to heat the reaction area of the sulfur removal bin 5, and flows back into the air inlet channel 1 through the outlet pipe 543 after being heated.
In this embodiment 1, a temperature sensor 55 for detecting temperature is provided inside the sulfur removal bin 5.
At this time, the temperature sensor 55 detects the temperature, the control valve 542 controls the amount of the hot gas introduced, and the reaction zone is heated by the exhaust gas, thereby facilitating the temperature control.
In this example 1, the temperature inside the overclad tube 54 is 130 ℃ to 150 ℃. Wherein the temperature inside the overclad tube 54 is 140 ℃.
At this time, the temperature in the envelope tube 54 was controlled to 140 ℃ to obtain the best reaction effect.
In this embodiment 1, a waste outlet 321 is provided at the right side of the bottom of the reservoir 32.
Thus, by providing the dirt outlet 321, the flocculated dirt can be taken out from the dirt outlet 321, which is convenient for use.
In this embodiment 1, a flocculant filling pipe 38 is disposed above the right side of the dust removing bin 3.
In this embodiment 1, an openable and closable filling opening 53 is provided above the air-permeable partition 51 and on the sidewall of the sulfur removal bin 5.
Thus, by providing the filling opening 53, the taking out of the waste material and the addition of the new material can be facilitated.
Example 2
As shown in fig. 2, according to the processing method of the energy-saving environment-friendly desulfurization, denitrification and dust removal device of the embodiment 2, the processing method of the energy-saving environment-friendly desulfurization, denitrification and dust removal device includes the following steps:
s1, ozone denitration: air is fed from the air inlet channel 1, ozone is generated by an ozone generator 21 and then is injected into the denitration reaction tube 2 through the air diffusing tube 22, nitrogen dioxide and oxygen are generated by reaction with nitric oxide in smoke dust in the denitration reaction tube 2, the ozone is then generated by reaction with the nitrogen dioxide to generate nitrate and oxygen, the nitrogen dioxide is generated by reaction with the nitrate to generate dinitrogen pentoxide, meanwhile, the stirring motor 23 drives the stirring motor shaft 231 to rotate, and a plurality of groups of stirring paddles 232 arranged on the stirring motor shaft 231 can accelerate the mixing of the air and pressurize the fed air;
s2, denitration and dust removal: gas after reaction is injected into the dust removal bin 3, water is sprayed under the action of the upper spray pipe 33 and the lower spray pipe 34, dinitrogen pentoxide reacts with water to generate nitric acid, meanwhile, dust particles in smoke dust are absorbed by the water and fall into the water storage tank 32, a flocculating agent added into the water storage tank 32 can perform flocculating settling and acid-base neutralization on harmful substances, and a flocculating stirring paddle 362 in the water storage tank 32 can accelerate a flocculating process;
s3, cooling and dehumidifying: the denitrated and dedusted gas enters the cooling bin 4 to be condensed and dehumidified, and water drops are gathered at the bottom of the cooling bin 4 and are injected into the dedusting bin 3 again under the action of the water return pump 42 for recycling;
s4, sulfur removal: the cooled and dehumidified gas is injected into the sulfur removal bin 5 from the second connecting pipe 44, reacts with the slaked lime block 52 in the sulfur removal bin 5, is discharged from the purification outlet 56 after sulfide is removed, simultaneously is introduced from the air inlet channel 1 through the inlet pipe 541, enters the ladle pipe 54 to heat the reaction area of the sulfur removal bin 5, and flows back into the air inlet channel 1 through the outlet pipe 543 after being heated.
Therefore, the denitration reactor provided by the invention can remove or reduce SO generated in the coal burning process by arranging the denitration reaction pipe, the dust removal bin, the cooling bin and the sulfur removal bin2、NOxAnd dust, thereby effectively protecting the environment. The invention is suitable for being widely applied to the treatment of the coal combustion exhaust flue gas.
The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.

Claims (8)

1. The utility model provides an energy-concerving and environment-protective type SOx/NOx control dust collector which characterized in that: the denitration reactor comprises an air inlet channel, a denitration reaction tube, a dust removal bin, a cooling bin and a desulphurization bin, wherein the right end of the air inlet channel is connected with the denitration reaction tube, an ozone generator is arranged at the lower left of the denitration reaction tube, a stirring motor is arranged at the outer part of the right side of the denitration reaction tube, an air diffusing tube is arranged in the denitration reaction tube, a plurality of groups of air diffusing holes are arranged on the air diffusing tube, the ozone generator is connected with the air diffusing tube, the stirring motor is connected with a stirring motor shaft, the stirring motor shaft penetrates through the right side wall of the denitration reaction tube and then extends into the denitration reaction tube, a plurality of groups of stirring paddles are arranged on the stirring motor shaft, the denitration reaction tube is communicated with the dust removal bin at the lower right, a dust removal partition plate is fixed at the upper part in the dust removal bin, a water storage tank is arranged at the lower part of the, the upper spray pipe and the lower spray pipe are respectively provided with a plurality of groups of upper spray heads and lower spray heads, the upper spray pipe and the lower spray pipe are connected with a first connecting pipe, the lower end of the first connecting pipe extends into a water storage tank, the lower end of the first connecting pipe is provided with a water suction pump, the left side outside the water storage tank is provided with a flocculation stirring motor, a flocculating agent is added inside the water storage tank, the flocculation stirring motor is connected with a flocculation motor shaft, the flocculation motor shaft penetrates through the left side wall of the water storage tank and then extends into the water storage tank, a plurality of groups of flocculation stirring paddles are arranged on the flocculation motor shaft, the middle part of the left side of the dust removal bin is communicated with the cooling bin through a channel pipe, a first partition plate and a second partition plate are arranged in the cooling bin, the right end of the first partition plate is fixedly connected with the right side wall of the cooling bin, the left end of the second partition, the cooling bin bottom is equipped with the wet return, be provided with the wet return pump in the wet return, the wet return other end with the tank connection, the cooling bin with the sulphur removal storehouse is connected through the second connecting pipe, be equipped with ventilative baffle in the sulphur removal storehouse, the top is equipped with the purification export, slaked lime piece has been placed on ventilative baffle upper portion, the sulphur removal storehouse outside is equipped with the involucrum, the involucrum left side be equipped with the intake duct is connected advance the pipe, the right side be equipped with the exit tube that the intake duct is connected, it is equipped with the control valve to advance intraductally.
2. The energy-saving environment-friendly desulfurization, denitrification and dust removal device as claimed in claim 1, is characterized in that: and a temperature sensor for detecting temperature is arranged in the sulfur removal bin.
3. The energy-saving environment-friendly desulfurization, denitrification and dust removal device as claimed in claim 1, is characterized in that: the temperature in the tube is 130-150 ℃.
4. The energy-saving environment-friendly desulfurization, denitrification and dust removal device as claimed in claim 3, characterized in that: the temperature inside the tube was 140 ℃.
5. The energy-saving environment-friendly desulfurization, denitrification and dust removal device as claimed in claim 1, is characterized in that: and a sewage taking-out opening is formed in the right side of the bottom of the water storage tank.
6. The energy-saving environment-friendly desulfurization, denitrification and dust removal device as claimed in claim 1, is characterized in that: and a flocculating agent filling pipe is arranged above the right side of the dust removal bin.
7. The energy-saving environment-friendly desulfurization, denitrification and dust removal device as claimed in any one of claims 1 to 6, wherein: a filler opening which can be opened and closed is arranged above the ventilating partition plate and on the side wall of the desulphurization bin.
8. A treatment method of an energy-saving environment-friendly desulfurization, denitrification and dust removal device is characterized by comprising the following steps: the energy-saving environment-friendly desulfurization, denitrification and dust removal device as defined in any one of claims 1 to 7, wherein the treatment method comprises the following steps:
s1, ozone denitration: air is fed from the air inlet channel, ozone is generated by an ozone generator and then is injected into the denitration reaction tube through the air diffusing tube, nitrogen dioxide and oxygen are generated by reaction of the ozone and nitric oxide in smoke dust in the denitration reaction tube, the ozone and the nitrogen dioxide react to generate nitrate and oxygen, the nitrogen dioxide and the nitrate react to generate dinitrogen pentoxide, meanwhile, the stirring motor drives the stirring motor shaft to rotate, and a plurality of groups of stirring paddles arranged on the stirring motor shaft can accelerate gas mixing and pressurize the inlet air;
s2, denitration and dust removal: gas after reaction is injected into the dust removal bin, water is sprayed under the action of the upper spray pipe and the lower spray pipe, dinitrogen pentoxide reacts with water to generate nitric acid, meanwhile, dust particles in smoke dust are absorbed together by the water and fall into the water storage tank, a flocculating agent added into the water storage tank can perform flocculating settling and acid-base neutralization on harmful substances, and a flocculating stirring paddle in the water storage tank can accelerate a flocculating process;
s3, cooling and dehumidifying: the gas after denitration and dust removal enters a cooling bin for condensation and dehumidification, water drops are gathered at the bottom of the cooling bin and are injected into the dust removal bin again for recycling under the action of a return water pump;
s4, sulfur removal: the gas through cooling and dehumidification is injected into the desulfurization bin from the second connecting pipe, reacts with the slaked lime piece in the desulfurization bin, is discharged from the purification outlet after removing sulfides, and simultaneously heats the reaction area of the desulfurization bin in a process of introducing waste gas into the ladle from the air inlet passage through the inlet pipe, and the heated waste gas flows back into the air inlet passage from the outlet pipe.
CN202010550139.9A 2020-06-16 2020-06-16 Energy-saving environment-friendly desulfurization, denitrification and dust removal device and treatment method Pending CN111617611A (en)

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