CN207871902U - A kind of flue gas processing device - Google Patents
A kind of flue gas processing device Download PDFInfo
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- CN207871902U CN207871902U CN201721881960.9U CN201721881960U CN207871902U CN 207871902 U CN207871902 U CN 207871902U CN 201721881960 U CN201721881960 U CN 201721881960U CN 207871902 U CN207871902 U CN 207871902U
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Abstract
A kind of flue gas processing device, belongs to technical field of environment protection equipment.It is characterized in that：Including flue collector（14）, sodium bicarbonate grinding device（7）, powder warm-up block（6）And dedusting module, flue collector（14）Inlet end be used for pending flue gas input, flue collector（14）Outlet side be connected to the inlet end of dedusting module, sodium bicarbonate grinding device（7）Inlet end and flue collector（14）Inlet end connection, sodium bicarbonate grinding device（7）Outlet side and flue collector（14）Connection, powder warm-up block（6）It is arranged in sodium bicarbonate grinding device（7）And flue collector（14）Between, dedusting module is wet desulfuration tower or scrubbing tower（13）.This flue gas processing device fully reacts sodium bicarbonate powder and flue gas, reduces the energy consumption of powder warm-up block, and desulfurization off sulfide effect is good, and can directly handle low-temperature flue gas.
Description
Technical field
A kind of flue gas processing device, belongs to technical field of environment protection equipment.
Background technology
Modern environment science warns us, and Atmosphere environment resource is not inexhaustible, as water resource and mineral provide
Source is the same, it is the jointly owned wealth of the mankind, it is necessary to be protected from generation to generation, highly treasure and rationally utilize.Flue gas is gas
It is the main reason for polluting residential block air with the mixture of flue dust.The ingredient of flue gas is very complicated, gas include water vapour,
Sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbon and oxynitrides etc., flue dust include combustion
Ash content, coal grain, oil droplet and high-temperature split product of material etc., therefore flue gas is to compound dirt that the pollution of environment is a variety of poisonous substances
Dye.Three parts such as dedusting, desulphurization and denitration are generally comprised to the processing of flue gas at present, wherein desulfurization and denitration part is cigarette
Most reluctant technique in gas disposal.
Flue gas desulfurization generally use alkali desulphurization, since the oxysulfide in flue gas is mainly sulfur dioxide and three oxidations
Sulphur, therefore the sulfur dioxide and sulfur trioxide in flue gas are absorbed using alkali.The most commonly used is selectivity to urge at present for denitrating flue gas
Change reduction denitration, selective non-catalytic reduction method denitration method and wet flue gas denitration technology.
Under the conditions of selective catalytic reduction SCR method denitrations are existing for catalyst, using ammonia, carbon monoxide or hydrocarbonization
It closes object etc. and is used as reducing agent, the NO in flue gas is reduced to N in the presence of oxygen2.SCR can be used as to react reducing agent
Have ammonia, carbon monoxide, hydrogen, also methane, ethylene, propane, propylene etc..
SNCR is selective non-catalytic reduction, is a kind of inexpensive denitration technology of maturation.The technology is with burner hearth or water
The predecomposition furnace of mud industry is reactor, and the reducing agent containing amino is sprayed into burner hearth, reducing agent and the nitrogen oxides in flue gas
Reaction generates ammonia and water.In selective non-catalytic reduction method denitrating technique, urea or amino-compound are in higher reaction temperature
Degree（930~1090 DEG C）Flue gas is injected, nitrogen oxides is reduced to nitrogen, the removal efficiency of the nitrogen oxides of SNCR techniques is main
Stoichiometric ratio, mixability and reaction time etc. depending on reaction temperature, ammonia and nitrogen oxides, studies have shown that SNCR
The temperature control of technique is most important.If temperature is too low, the reaction of ammonia is incomplete, be easy to cause ammonia leakage；And temperature mistake
Height, ammonia are then oxidized easily the removal effect that ammonia is counteracted for nitrogen oxides.It is too high or too low for temperature all to cause to restore
Agent loss and removal of nitrogen oxide rate decline.
Wet flue gas denitration is that the principle that nitrogen oxides dissolves is purified coal-fired flue-gas using liquid-absorbant.It is maximum
Obstacle be nitric oxide be difficult to be dissolved in water, often require that and nitric oxide be oxidized to nitrogen dioxide first.It is general thus first
Nitric oxide with oxidant, ozone, chlorine dioxide or potassium permanganate by reacting, and oxidation generates nitrogen dioxide, then nitrogen dioxide
By water or alkaline solution absorption, denitrating flue gas is realized.
More or less all there is technical problem in above various denitration technologies, the chemistry arrived involved in above procedure first is anti-
It answers, is required for reacting under conditions of high temperature, but reaction temperature is not achieved in the temperature of the flue gas of many Industrial Boilers, therefore lead
It causes the denitration effect of above-mentioned technology poor, is unable to reach the environmental requirement of country.
Application No. is 201410094300.0 Chinese invention patent applications to disclose a kind of flue gas pollutant control one
Change purification technique, flue gas and sodium bicarbonate powder is continuously introduced into circulating fluid bed reactor, flue gas makes sodium bicarbonate powder
It at sulphided state and reacts, the preliminary sulfur and nitrogen oxides removed in flue gas；Then sprinkling sodium bicarbonate water is utilized
The method of solution removes oxysulfide and other acidic oxide components in flue gas, using the solution containing sodium bicarbonate as suction
It receives liquid and further removes the nitrogen oxides in flue gas, since with sodium bicarbonate chemistry does not occur for nitrogen oxides instead under usual state
It answers, and does not refer to how making the nitrogen oxides in flue gas and reaction of sodium bicarbonate in this application file, and due to disclosed
It is then sharp it can be seen that it is mainly to be aoxidized to nitrogen oxides using oxidant that it, which removes the nitrogen oxides in flue gas, in technique
The nitrogen oxides after oxidation is absorbed with the alkalinity of sodium bicarbonate.Application No. is 201611252392.6 Chinese invention is special
Profit applies for a kind of waste incinerator two-part flue gas purification system, and in disclosed technical solution, sodium bicarbonate is still utilized
Alkalinity the acidic components such as oxysulfide in flue gas are removed, and nitrogen oxides is then that selective catalytic reduction is utilized
Device（SCR）It removes, needs flue-gas temperature at 200 DEG C or more, to reach reaction temperature.Application No. is 201621390495.4
Chinese utility model patent disclose a kind of device of the desulfurization and dedusting denitration for low-temperature flue gas, disclosed technical solution
In, sodium bicarbonate is used merely to the oxysulfide in removing flue gas, and the removing of nitrogen oxides is also with SCR reactions
The temperature of tower, flue gas need to be not less than 235 DEG C.In technical solution disclosed in above-mentioned file, removes nitrogen oxides in effluent and need to protect
Demonstrate,prove flue gas temperature at 200 DEG C or more, have reached the removal effect of required nitrogen oxides, due to flue gas needed before denitration into
Row desulfurization, the temperature of flue gas is generally difficult to be maintained at 200 DEG C or more after desulfurization, this results in denitrating flue gas effect poor, place
The content of nitrogen oxides in effluent after reason is higher, cannot be satisfied national standard.
Invention content
The technical problems to be solved in the utility model is：Overcoming the deficiencies of the prior art and provide one kind can be fully utilized
Sodium bicarbonate powder carries out desulphurization denitration to flue gas, can directly be handled low-temperature flue gas, at the flue gas of high treating effect
Manage device.
Technical solution adopted by the utility model to solve its technical problems is：The flue gas processing device, it is characterised in that：
Including flue collector, sodium bicarbonate grinding device, powder warm-up block and dedusting module, the inlet end of flue collector is for pending
The input of flue gas, the outlet side of flue collector are connected to the inlet end of dedusting module, the inlet end of sodium bicarbonate grinding device and master
The inlet end of flue is connected to, and the outlet side of sodium bicarbonate grinding device is connected to flue collector, and powder warm-up block is arranged in carbonic acid
Between hydrogen sodium grinding device and flue collector, dedusting module is wet desulfuration tower or scrubbing tower.
Preferably, the inlet end of the flue collector is connected with deduster, the inlet end of deduster outlet side and flue collector
It is connected, the inlet end of deduster is used for the input of pending flue gas.
Preferably, the inlet end of the flue collector is also associated with chimney meatus draught fan, the outlet side of chimney meatus draught fan and master
The inlet end of flue is connected to, and the inlet end of chimney meatus draught fan is connected to by auxillary flue with the inlet end of sodium bicarbonate grinding device,
The outlet side of chimney meatus draught fan is also connected to by drawing flue with the inlet end of sodium bicarbonate grinding device, draws flue and secondary cigarette
Valve is both provided on road.
Preferably, the sodium bicarbonate grinding device includes feed bin, grinding machine and powder conveying pipe, and feed bin setting is being ground
On the upside of machine, the inlet end of grinding machine is connected to the inlet end of flue collector, and the outlet side of grinding machine is connected by powder conveying pipe and flue collector
It is logical.
Preferably, the inlet end of the grinding machine is connected with grinding device air-introduced machine.
Preferably, it is provided with grader between the grinding machine and powder conveying pipe.
Preferably, the outlet side of the sodium bicarbonate grinding device is connected to by smoke backflow channel with flue collector, powder
Body warm-up block is arranged on smoke backflow channel.
Preferably, the powder warm-up block includes powder heating tube, and powder heating tube is arranged in flue collector and carbonic acid
Between hydrogen sodium grinding device, the both ends of powder heating tube are connected to the outlet side of flue collector and sodium bicarbonate grinding device respectively,
It is provided with heating tape in powder heating tube.
Preferably, the powder warm-up block further includes input temp sensor and output temperature sensor, input
The inlet end in powder heating tube is arranged in temperature sensor, and output temperature sensor is arranged in the outlet side of powder heating tube.
Preferably, the scrubbing tower includes scrubbing tower main body, water inlet water pump and into sprinkler head, scrubbing tower body lumen
Top is provided with multiple into sprinkler head, and the water outlet of water pump of intaking is connected with multiple into sprinkler head simultaneously, scrubbing tower main body into
The setting of gas end is arranged in lower part, the outlet side of scrubbing tower main body on top.
Compared with prior art, advantageous effect possessed by the utility model is：
1, the sodium bicarbonate grinding device of this flue gas processing device is ground sodium bicarbonate, and by by flue collector
Sodium bicarbonate when interior flue gas is introduced into sodium bicarbonate grinding device to grinding preheats, slightly by powder warm-up block
Micro- preheating can enter in flue collector, and sodium bicarbonate powder and flue gas is made fully to react, and reduce the energy of powder warm-up block
Consumption, dedusting module can remove unreacted sodium bicarbonate powder and flue dust, avoid being directly discharged to causing environment in air
Pollution, the energy consumption of this flue gas processing device is low, and desulfurization off sulfide effect is good, and can directly handle low-temperature flue gas.
2, deduster can in advance be dusted the flue gas entered in flue collector, and the flue dust in flue gas is avoided to interfere carbon
Sour hydrogen sodium powder body comes into full contact with the flue gas in flue collector, ensure that nitrogen oxides in flue gas and oxysulfide can fully with
Sodium bicarbonate powder reacts, and desulfurization off sulfide effect is good.
3, draw on flue and auxillary flue and be both provided with valve, so as to as needed by flue gas by draw flue or
Auxillary flue draw, so as to adjust extraction flue gas flow velocity, avoid counteracting the grinding of sodium bicarbonate, additionally it is possible to will
Sodium bicarbonate after grinding is delivered in flue collector.
4, the flue gas drawn is passed through grinding machine, and sodium bicarbonate powder ground in grinding machine is conveyed by powder conveying pipe
To flue collector, flue gas can either preheat the sodium bicarbonate powder after grinding, additionally it is possible to be carried using the moisture in flue gas
The grinding efficiency of high carbon acid hydrogen sodium ensures the granularity of sodium bicarbonate powder after grinding between 4 μm ~ 40 μm, and then ensure that carbon
Sour hydrogen sodium powder body comes into full contact with flue gas and fully reacts, and desulfurization off sulfide effect is good.
5, powder conveying pipe by grinding device air-introduced machine realize positive pressure conveying, due to sodium bicarbonate powder granularity compared with
It is small, there is very strong adsorptivity, if using negative-pressure conveying system, material can be accumulated in adsorption precipitation on impeller, influence impeller
Balance causes wind turbine vibrations that cannot work.
6, grader can detach sodium bicarbonate powder, and the powder for keeping granularity smaller enters powder conveying pipe
Interior, the larger powder of granularity is re-introduced into grinding in grinding machine, to ensure the granularity of the sodium bicarbonate powder mixed with flue gas
It is small, can more fully in flue gas nitrogen oxides and oxysulfide react.
7, sodium bicarbonate powder is preheated by powder heating tube, the temperature of sodium bicarbonate powder is made to maintain reaction
Temperature, makes sodium bicarbonate powder fully be reacted with the sulfur and nitrogen oxides in flue gas by that is, 120 DEG C ~ 200 DEG C, and desulfurization is de-
Nitre effect is good.
8, input temp sensor can detect the temperature for entering the flue gas in powder heating tube, if temperature reaches anti-
Answer temperature, then the heating tape in powder heating tube does not work, if temperature is not up to reaction temperature, adding in powder heating tube
Torrid zone work, while output temperature sensor works, and monitors heating temperature in real time, ensures that the temperature of sodium bicarbonate powder maintains
Reaction temperature.
9, the water into sprinkler head ejection and the flow direction into the flue gas in scrubbing tower main body are on the contrary, thus by water to flue gas
Carry out back flushing, can by flue gas flue dust or unreacted sodium bicarbonate powder fully remove, then by subsequently removing
Dirt demister enables flue gas qualified discharge.
Description of the drawings
Fig. 1 is the structural schematic diagram of flue gas processing device.
Fig. 2 is the structural schematic diagram of dehumidification device.
Fig. 3 is the structural schematic diagram of sodium bicarbonate grinding device.
Fig. 4 is the scheme of installation of sodium bicarbonate grinding device.
Fig. 5 is the structural schematic diagram of powder warm-up block.
Fig. 6 is the structural schematic diagram of sodium bicarbonate grinding device in embodiment 2.
Fig. 7 is the partial enlarged view at A in Fig. 6.
In figure：1, boiler 2, deduster 3, chimney meatus draught fan 4, extraction flue 5, auxillary flue 6, powder preheating
Module 7, sodium bicarbonate grinding device 8, storage pond 9, water inlet water pump 10, water circulating pump 11, dredge pump 12,
Chimney 13, scrubbing tower 14, flue collector 15, flue gas input channel 16, into sprinkler head 17, cycle nozzle 18, into
Water tank 19, smoke backflow channel 20, dehumidification device main body 21, heat exchanger 22, cooler 23, condenser
24, refrigeration compressor 25, condensation fan 26, smoke volume damper 27, dehumidifying pipe 28, into cigarette air quantity adjust
Valve 29, dehumidifying smoke-intake pipe 30, grinding chamber 31, sodium bicarbonate warehouse 32, electric block 33, ventilation opening 34, material
Storehouse 35, grinding machine 37, balance pipe 38, grinding device smoke-intake pipe 39, powder conveying pipe 40, is ground grinding motor 36
Mill apparatus air-introduced machine 41, grader 42, grinding device pipe 43, powder preheating valve 44, powder heating tube
45, input temp sensor 46, output temperature sensor.
Specific implementation mode
Fig. 1 ~ 5 are the most preferred embodiments of the utility model, and 1 ~ 7 pair of the utility model is done furtherly below in conjunction with the accompanying drawings
It is bright.
A kind of flue gas processing device, including flue collector 14, sodium bicarbonate grinding device 7, powder warm-up block 6 and dedusting
Module, the inlet end of flue collector 14 are used for the input of pending flue gas, the outlet side of flue collector 14 and the inlet end of dedusting module
Connection, the inlet end of sodium bicarbonate grinding device 7 are connected to the inlet end of flue collector 14, the outlet of sodium bicarbonate grinding device 7
End is connected to flue collector 14, and powder warm-up block 6 is arranged between sodium bicarbonate grinding device 7 and flue collector 14, dedusting module
For wet desulfuration tower or scrubbing tower 13.The sodium bicarbonate grinding device 7 of this flue gas processing device is ground sodium bicarbonate, and
And sodium bicarbonate when by the way that the flue gas in flue collector 14 being introduced into sodium bicarbonate grinding device 7 to grinding preheats,
It can make to enter in flue collector 14 slightly preheating by powder warm-up block 6, sodium bicarbonate powder and flue gas fully react,
The energy consumption of powder warm-up block is reduced, dedusting module can remove unreacted sodium bicarbonate powder and flue dust, avoid directly
It is discharged into air and pollutes the environment, the energy consumption of this flue gas processing device is low, and desulfurization off sulfide effect is good, and can be direct
Low-temperature flue gas is handled.
The utility model is described further with reference to specific embodiment, however persons familiar with the art should
Solution, is to preferably explain here in connection with the detailed description that attached drawing provides, the structure of the utility model has necessarily had exceeded
These embodiments of limit, and for some equivalents or common approach, it is no longer described in detail herein, but still fall within this
The protection domain of application.
Embodiment 1
As shown in Figure 1：The flue gas processing device further includes deduster 2, the outlet flue of the inlet end and boiler 1 of deduster 2
Connection, the flue gas of boiler 1, which is introduced into deduster 2, to be entered back into after dedusting in flue collector 14, so as to avoid flue dust from influencing carbon
The mixing of sour hydrogen sodium powder body and flue gas, additionally it is possible to flue dust be avoided to influence sodium bicarbonate powder and the oxysulfide and nitrogen oxygen in flue gas
The reaction of compound.Deduster 2 can be bag filter, electric precipitator or pipe precipitator etc..
The outlet side of deduster 2 is connected to by flue gas input channel 15 with the inlet end of flue collector 14, and flue collector 14 exports
End is connected with dedusting module, and in the present embodiment, dedusting module is scrubbing tower 13, input terminal and the scrubbing tower 13 of flue collector 14
Inlet end is connected to, and the outlet side of scrubbing tower 13 is connected with chimney 12, to will handle it is up to standard after flue gas directly by 12 row of chimney
Go out.Chimney meatus draught fan 3 is provided between flue gas input channel 15 and flue collector 14, to avoid flow of flue gas from influencing boiler slowly excessively
1 burning.
It is additionally provided between flue collector 14 and auxillary flue 5 and draws flue 4, draw the inlet end and flue collector 14 of flue 4
Inlet end is connected to, and the outlet side for drawing flue 4 is connected to the middle part of auxillary flue 5, is drawn and is provided with valve, auxillary flue 5 on flue 4
Inlet end be also equipped with valve, so as to enter the velocity of flue gas in sodium bicarbonate grinding device 7 by valve regulated.
The inlet end of sodium bicarbonate grinding device 7 is connected to by auxillary flue 5 with flue gas input channel 15, sodium bicarbonate grinding
The outlet side of device 7 is connected to by smoke backflow channel 19 with the middle part of flue collector 14, and the setting of powder warm-up block 6 is returned in flue gas
On flow flue 19, dehumidification device is additionally provided on auxillary flue 5.Auxillary flue 5 can draw the flue gas in flue gas input channel 15
And be delivered in sodium bicarbonate grinding device 7, the grinding of sodium bicarbonate is assisted, and carried out to sodium bicarbonate powder after grinding pre-
Heat keeps the energy consumption of powder warm-up block 6 few, and the preheating time of sodium bicarbonate powder is reduced, and dehumidification device can adjust pair
Moisture in the flue gas that flue 5 is drawn, to improve the grinding efficiency of sodium bicarbonate, and makes sodium bicarbonate powder after grinding
Granularity it is thinner.
When in use, multiple boilers 1 can share a sodium bicarbonate grinding device 7 and scrubbing tower to this flue gas processing device
13, so as to reduce fume treatment cost.The outlet side of each auxillary flue 5 is both provided with valve, so as to avoid in cigarette
Gas enters in auxillary flue corresponding with the boiler 1 deactivated 5；It is both provided with valve on outlet side on each smoke backflow channel 19
Door, avoids flue gas from entering and is connected in smoke backflow channel 19 with the boiler 1 deactivated.
Scrubbing tower 13 includes scrubbing tower main body and loop module, and loop module liquid feeding end and the lower part of scrubbing tower main body connect
Logical, the hydrojet end of loop module is arranged on the top of scrubbing tower body lumen.Loop module includes water circulating pump 10 and cycle
Nozzle 17, the cycle setting of nozzle 17 recycle nozzle 17 and are provided with multiple on scrubbing tower body lumen top, and cycle nozzle 17 is set
It sets into 16 downside of sprinkler head, the liquid feeding end of water circulating pump 10 is connected to the lower part of scrubbing tower main body, and water circulating pump 10 goes out liquid
End is connected to multiple cycle nozzles 17 simultaneously, to realize the cycle of the water in scrubbing tower main body, improves dust-laying effect, and
Water can be made to realize to recycle, avoid the waste of water.The liquid feeding end and outlet end of water circulating pump 10 are both provided with water pump.
Scrubbing tower 13 further includes into water water pump 9 and into sprinkler head 16, and the inlet end setting of scrubbing tower main body is in lower part, washing
The outlet side of tower main body is arranged at top.It is arranged in scrubbing tower main body into sprinkler head 16, is arranged at intervals with into sprinkler head 16 more
It is a, intake water pump 9 water outlet simultaneously connect it is multiple into sprinkler head 16.Demister is provided in scrubbing tower main body, demister is set
It sets into the downside of sprinkler head 16, into sprinkler head 16 while for scrubbing tower moisturizing, moreover it is possible to be rinsed demister in this reality
Apply in example, water inlet water pump 9 setting there are two, two water inlet water pumps 9 are arranged in parallel, i.e., each water inlet water pump 9 water inlet end with
Water tank inlet 18 is connected to, and each water outlet for intaking water pump 9 is connected to multiple into sprinkler head 16, and each water pump 9 of intaking goes out
Water end (W.E.) is respectively connected with valve, spare so as to which a water inlet water pump 9 to be used as, and avoiding damaging into water water pump 9 influences boiler 1
It uses.
The bottom of scrubbing tower main body is connected with blowdown module, and blowdown module includes dredge pump 11 and storage pond 8, blowdown
The liquid feeding end of pump 11 is connected to scrubbing tower bottom part body, and the water outlet of dredge pump 11 is connected to storage pond 8, and dredge pump 11 can
The liquid of scrubbing tower bottom part body is delivered in storage pond 8, avoids sludge from being deposited in scrubbing tower bottom part body, influences to wash
The use of tower 13.There are two dredge pump 11 is arranged in parallel, i.e., the liquid feeding end of each dredge pump 11 connects with scrubbing tower bottom part body
Logical, the outlet end of each dredge pump 11 is connected to storage pond 8, and the liquid feeding end of each dredge pump 11 is respectively connected with valve, from
And can be spare by a conduct of dredge pump 11, avoid the damage of dredge pump 11 from influencing the use of boiler 1.The bottom of scrubbing tower main body
It is additionally provided with agitating device, so as to which the mud of scrubbing tower bottom part body to be all discharged.
Flue gas inspection module is provided in flue gas input channel 15, flue gas inspection module can be flue gas on-line detecting system
Or flue gas analyzer flue gas inspection module can monitor the content of nitrogen oxides in effluent and oxysulfide in real time, to make carbonic acid
Hydrogen sodium grinding device 7 can adjust grinding and the conveying speed of sodium bicarbonate in time, realize closed-loop control, both avoid carbonic acid
Hydrogen sodium powder body deficiency influences desulfurization off sulfide effect, and the conveying of sodium bicarbonate powder can be avoided excessive, improves fume treatment cost.
The middle part and outlet side of auxillary flue 5 are both provided with temperature sensor, can monitor the temperature of flue gas in real time, avoid flue-gas temperature mistake
Height causes sodium bicarbonate to decompose.The inlet end in smoke backflow channel 19 and outlet side are both provided with pressure sensor, can be real-time
The pressure in smoke backflow channel 19 is monitored, ensures that sodium hydrogen carbonate powder body can be sprayed onto in flue collector 14 and is sufficiently mixed with flue gas,
Insufficient pressure is avoided to influence the mixing of sodium bicarbonate powder and flue gas.
The inlet end of scrubbing tower 13 is provided with pressure signal, the pressure of flue gas can be monitored in real time, ensures that flue gas can
Smoothly enter scrubbing tower 13 and be discharged by scrubbing tower 13, avoids the burning for influencing boiler 1.The bottom of scrubbing tower 13 is additionally provided with
PH sensors, pressure sensor, density sensor, liquid level sensor, pH sensors can detect the acid-base value in scrubbing tower 13,
To timely adjust acid-base value by way of moisturizing, pressure sensor can detect the pressure in scrubbing tower 13, keep away in real time
Exempt from the excessive discharge for influencing 1 flue gas of boiler of pressure in scrubbing tower 13, density sensor can monitor liquid in scrubbing tower 13 in real time
Density, to judge whether liquid intracellular bicarbonate sodium or other compositions content are saturated, to timely moisturizing to realize the ingredient
Continuation washing absorption, liquid level sensor can monitor the liquid level in scrubbing tower 13 in time, avoid the excessively high flue gas that influences of liquid level
Into.
Preferably, the flue gas processing device can be handled the flue gas of chain-grate boiler.Since the heat of chain-grate boiler is negative
Lotus is extremely unstable, cause smoke evacuation it is also unstable, and smoke temperature be not achieved traditional denitrating technique temperature range requirement, conventional method without
Method meets denitration requirement, and the flue gas processing device uses sodium bicarbonate as soil release agent, soil release agent and sulfureous in flue gas oxide
It reacts with nitrogen oxides, the flue gas after reaction is washed by scrubbing tower 13, meets flue gas qualified discharge standard.In this implementation
In example, scrubbing tower 13 could alternatively be desulfurizing tower.
As shown in Figure 2：Dehumidification device include dehumidification device main body 20, heat exchanger 21, cooler 22, condenser 23 and
Refrigeration compressor 24, dehumidification device main body 20 are rectangular box body, and the right side of dehumidification device main body 20 is provided with vertical installation
The middle part of chamber, dehumidification device main body 20 is provided with horizontal partition board, to which 20 inner cavity of dehumidification device main body is divided into top
Heat up the dehumidifying chamber of chamber and lower part, is provided with intercommunicating pore on the right side of partition board, and to will heat up chamber and the chamber that dehumidifies is connected to, heat up chamber
Left end is connected with dehumidifying pipe 27, and the left end for the chamber that dehumidifies is connected with dehumidifying smoke-intake pipe 29, dehumidifying smoke-intake pipe 29 and auxillary flue 5
Outlet side is connected to, and dehumidifying pipe 27 is connected to the inlet end of sodium bicarbonate grinding device 7, is ground to make to enter sodium bicarbonate
Flue gas moisture content in mill apparatus 7 is moderate, and proper temperature, avoids temperature is excessively high sodium bicarbonate is caused to decompose, additionally it is possible to
Avoid the preheating of the too low grinding and sodium bicarbonate for influencing sodium bicarbonate of temperature.Condenser 23 and the setting of refrigeration compressor 24 are being pacified
In behaveing affectedly, and condensation fan 25 is provided in the dehumidification device main body 20 on the upside of installation cavity, the setting of heat exchanger 21 is filled in dehumidifying
On the left of the inner cavity for setting main body 20, the setting of cooler 22 is in dehumidifying intracavitary, and cooler 22 will dehumidifying chamber closing.Refrigeration compressor 24
It is connected simultaneously with cooler 22 and condenser 23, to complete the conveying of refrigerant.
Preferably, the top setting of heat exchanger 21 in heating intracavitary and will heat up chamber closing, the lower part of heat exchanger 21
Setting dehumidifying intracavitary simultaneously closes dehumidifying chamber, and heat exchanger 21 is arranged under the left side of cooler 22, the left side of heat exchanger 21
It is connected on the left of portion and dehumidifying chamber, the lower right side of heat exchanger 21 is also connected to dehumidifying chamber, therefore enters the cigarette of dehumidifying intracavitary
Gas enters by heat exchanger 21, being then discharged again by the lower part of 21 other side of heat exchanger, and hot flue gas can move up
At the top of to heat exchanger, the low-temperature flue gas for the intracavitary that heats up can exchange heat with the high-temperature flue gas on 21 top of heat exchanger, to fill
Divide the temperature that flue gas itself is utilized, reduces the consumption of heat.Flue gas is usually 100 DEG C, and relative humidity is 6% ~ 7%, flue gas
By dehumidifying, smoke-intake pipe 29 enters dehumidifying intracavitary, and temperature is down to 44 DEG C or so after exchanging heat with 21 lower part of heat exchanger, so
Flue gas temperature after subcooler 22 is down to 14 DEG C afterwards, and the vapor in flue gas condenses ponding at this time, and by 22 downside of cooler
Water accumulating disc in, heating intracavitary is entered by intercommunicating pore through cooling flue gas, again with 21 top of heat exchanger exchange heat, temperature
Rise to 80 DEG C, relative humidity be less than or equal to 3.5%, to sodium bicarbonate can either being assisted to grind, and can be good to bicarbonate
Sodium is preheated, and sodium bicarbonate is avoided to decompose.
Be provided with into cigarette volume damper 28 between dehumidifying smoke-intake pipe 29 and dehumidifying chamber, dehumidifying pipe 27 and heating chamber it
Between be provided with smoke volume damper 26, to facilitate the speed for adjusting flue gas inlet and outlet dehumidification device main body 20, pass through
The temperature and relative humidity for controlling the flow velocity of flue gas to adjust the heat exchange of flue gas and dehumidify the time, and then adjust, it is easy to adjust, from
And it disclosure satisfy that the fume treatment of different boilers 1.
As shown in Fig. 3 ~ 4：Sodium bicarbonate grinding device 7 includes feed bin 34, grinding machine 36 and powder conveying pipe 39, feed bin 34
It is vertically provided at the upper right of grinding machine 36, the lower part of feed bin 34 is the taper that from top to bottom diameter is gradually reduced, to convenient
Sodium bicarbonate is delivered in grinding machine 36, grinding machine 36 is connected with the grinding motor 35 for driving its work.The upside of grinding machine 36 is
Gas end, powder conveying pipe 39 is horizontally set on 36 upside of grinding machine, and the left end of powder conveying pipe 39 and the outlet side of grinding machine 36 connect
Logical, in lower part, the inlet end of grinding machine 36 is connected with grinding device smoke-intake pipe 38 for the inlet end setting of grinding machine 36, and grinding device is into cigarette
The inlet end of pipe 38 is connected to the outlet side of dehumidifying pipe 27, the flue gas after dehumidifying is introduced into grinding machine 36, grinding device
It is provided with grinding device air-introduced machine 40 between smoke-intake pipe 38 and dehumidifying pipe 27, to realize the positive pressure of sodium bicarbonate powder
Conveying uses common negative pressure transportation, meeting when material passes through wind turbine since sodium bicarbonate fine powder has very strong adsorptivity
Adsorption precipitation is accumulated on impeller, influences impeller balance, and wind turbine is caused to shake cisco unity malfunction, and the utility model uses just
Pressure conveying, makes transport system stable operation.The outlet side of powder conveying pipe 39 is also associated with grinding device pipe 42, grinding dress
The outlet side for setting pipe 42 is connected to smoke backflow channel 19.
Grader 41 is provided between grinding machine 36 and powder conveying pipe 39, grader 41 is to entering powder conveying pipe 39
Powder is classified, and ensures that the sodium bicarbonate powder granularity entered in powder conveying pipe 39 is small, to when being mixed with flue gas
Can more fully in flue gas nitrogen oxides and oxysulfide react, ensure that flue gas desulfurization and denitration effect
Fruit.
It is additionally provided between feed bin 34 and grinding machine 36 for powder metering device, thus quantitative addition sodium bicarbonate,
The dosage that sodium bicarbonate can preferably be controlled, not only having ensure that treated, flue gas is qualified, but also can avoid sodium bicarbonate dosage
Excessively, cause fume treatment of high cost.
Sodium bicarbonate grinding device 7 is arranged in grinding chamber 30, and sodium bicarbonate grinding device 7 is mounted on grinding chamber 30
Left side, the right side of grinding chamber are sodium bicarbonate warehouse 31, and 31 upside of sodium bicarbonate warehouse is provided with ventilation opening 33, on ventilation opening 33
It is provided with for by 33 closed cover board of ventilation opening, being additionally provided with electric block 32 in grinding chamber 30, electric block 32 is used for carbon
The discharging of sour hydrogen sodium also facilitates and sodium bicarbonate is added in feed bin 34, easy to use.
As shown in Figure 5：Powder warm-up block 6 includes powder heating tube 44, input temp sensor 45, output temperature sensing
The inlet end of device 46 and control device, powder heating tube 44 is connected to the outlet side of grinding device pipe 42, powder heating
The outlet side of pipe 44 is connected to the inlet end in smoke backflow channel 19, multiple heating tapes is provided in powder heating tube 44, and more
A heating tape is arranged in parallel, and per the adjacent spaced 300mm of heating, and heating tape is wrapped in 44 outside of powder heating tube, each
Heating tape is in series with control switch.In the present embodiment, heating tape has been arranged in parallel multigroup, and every group is in series with three heating
Band, every group of heating tape are in series with control switch.In the present embodiment, heating tape is ceramic heat band.Input temp sensor 45
Inlet end in powder heating tube 44 is set, and output temperature sensor 46 is arranged in the outlet side of powder heating tube 44, input temperature
Degree sensor 45 and output temperature sensor 46 are connect with control device, and control switch is also connect with control device, input temperature
The monitoring in real time of degree sensor 45 enters the flue-gas temperature of powder heating tube 44, when flue-gas temperature is more than or equal to assigned temperature,
Control device switchs control heating tape by control and does not work, and when flue-gas temperature is less than assigned temperature, control device control adds
Torrid zone work, the flue-gas temperature after the monitoring heating in real time of output temperature sensor 46, control device is according to output temperature sensor
46 temperature detected adjust the quantity of heating tape work, to adjust the heating temperature of heating tape, realize that closed loop is adjusted, ensure
Flue-gas temperature is stablized in assigned temperature, i.e., in reaction temperature section.The inlet end of powder heating tube 44 is equipped with powder and preheats valve
43, the break-make of flue gas entrance can be controlled, the cleaning and maintenance of powder heating tube 44 are facilitated.In the present embodiment, control device
For PLC controller.Every group of heating tape is in series with temperature detect switch (TDS).
The utility model additionally provides a kind of processing method carrying out processing flue gas using above-mentioned flue gas processing device, including
Following steps：
1）To the flue gas ash removal of boiler 1；
The flue gas that boiler 1 is discharged is introduced into deduster 2, the flue dust in flue gas is removed, to avoid the cigarette in flue gas
Dirt interferes sodium bicarbonate powder to be mixed with flue gas, and the nitrogen oxides and oxysulfide influenced in sodium bicarbonate powder and flue gas occurs
Reaction, additionally it is possible to reduce subsequent depositing dust intractability.
2）Partial fume is drawn, will be sent into sodium bicarbonate grinding device 7 after the flue gas dehumidifying after extraction；
Partial fume is drawn by auxillary flue 5, the flue gas of extraction enters in dehumidification device, flue gas preferentially enter except
With 21 lower part of heat exchanger heat exchange occurs for wet intracavitary, and then exchanging heat again with cooler 22 condenses, and keeps the vapor in flue gas cold
Lime set, then flue gas enter heating chamber and with the top of heat exchanger 21 exchange heat after enter back into sodium bicarbonate grinding device
The grinding of auxiliary sodium bicarbonate in 7.
For the flue gas processing device when to the fume treatment of chain-grate boiler, the flue gas of chain-grate boiler is at 100 DEG C ~ 130 DEG C, phase
It is 6% ~ 7% to humidity, the excessively high grinding that can influence sodium bicarbonate of humidity, flue gas reduces by 44 after exchanging heat with 21 lower part of heat exchanger
DEG C or so, into cooler 22 after temperature be down to 14 DEG C, due to temperature decrease, the vapor liquefaction in flue gas and and flue gas
Separation, then the partial fume is sent into low-temperature receiver of the heat exchanger 21 as cooling, air discharging, and enters the heat in heat exchanger 21
Flue gas heat exchange, so that the temperature for the flue gas being discharged by dehumidifying pipe 27 is reached 80 DEG C, relative humidity is less than or equal to 3.5, and hot
The flue-gas temperature of the heat on 21 top of exchanger can move down after reducing and be expelled to dehumidifying intracavitary by 21 right side of heat exchanger.It removes
Wet device can also avoid flue-gas temperature excessively high, and sodium bicarbonate is caused to decompose, and influence flue gas desulfurization and denitrification efficiency.
The flue-gas temperature entered in sodium bicarbonate grinding device is 80 DEG C, relative humidity 3.5%, directly by the flue gas
It is introduced into grinding machine 36, to improve the grinding efficiency of grinding machine 36, the granularity after sodium bicarbonate grinding is reduced, after making grinding
The granularity of sodium bicarbonate is 4 μm ~ 40 μm, preferably smaller than 20 μm.Temperature due to entering the flue gas in grinding machine 36 is 80 DEG C,
The temperature of sodium bicarbonate powder after grinding can be made close to 80 DEG C.
3）Sodium bicarbonate powder after grinding mixes after the preheating of powder warm-up block 6 with flue gas；
Sodium bicarbonate powder after grinding is entered by way of positive pressure conveying in powder warm-up block 6, and by powder
Warm-up block 6 preheats, and the temperature of sodium bicarbonate powder is made to reach 120 DEG C ~ 200 DEG C, preferably 120 DEG C ~ 140 DEG C, due to bicarbonate
The temperature of sodium powder body is close to 80 DEG C, therefore the sodium bicarbonate powder after grinding only needs to improve 20 DEG C ~ 40 DEG C, reduces
The energy consumption of powder warm-up block 6.Sodium bicarbonate powder after preheating is injected directly into flue collector 14, and with the cigarette in flue collector 14
Gas is sufficiently mixed, the nitrogen oxides and oxysulfide in sodium bicarbonate powder and flue gas that granularity is 4 μm ~ 20 μm 120 DEG C ~
140 DEG C of temperature condition issues biochemical reaction, to by flue gas nitrogen oxides and oxysulfide remove, so as to will
Nitrogen oxides and oxysulfide are completely converted into free of contamination substance, and the nitrogen oxides and oxysulfide after washing in flue gas can
Removing 40% ~ 50%, treated, and flue gas is up to state standards, can be with direct emission.
Sodium bicarbonate and the reaction principle that nitrogen oxides and oxysulfide chemically react are as follows：
2NaHCO3 → Na2CO3 + H2O +CO2
2 NaHCO3 + SO3 → Na2SO4 + 2 CO2↑ + H2O
Na2CO3 + SO3 → Na2SO4 + CO2↑
2NaHCO3 + SO2 + ½O2 ↔ Na2SO4 + H2O + 2CO2
2NaHCO3 + SO2 + NO + O2 ↔ Na2SO4 + NO2 + H2O + 2CO2
2NaHCO3 + 2NO2 + ½O2 ↔ 2NaNO3 + H2O + 2CO2
4Na2SO3 + 2NO2 ↔ 4Na2SO4 + N2
2NO + 2SO2 ↔ 2SO3 + N2
2NaHCO3 + SO3 ↔ Na2SO4 + H2O + 2CO2
5）Gas after reaction enters washing heel row in scrubbing tower 13 and goes out.
Contain the various solid materials generated after unreacted sodium bicarbonate powder and reaction, warp in gas after reaction
After scrubbing tower 13 washs, solid material is removed.Flue gas after washing enters in chimney 12, and is discharged by chimney 12.
With existing selective non-catalytic reduction method（SNCR）And selective catalytic reduction（SCR）It compares, SNCR requirements
The temperature of flue gas is 900 DEG C or so, and SCR requires the temperature of flue gas at 350 DEG C ~ 550 DEG C, can just get to best denitration effect
Fruit, and the flue gas of the chain-grate boiler is only 100 DEG C, and the reaction temperature requirement of SNCR and SCR is not achieved completely, if to flue gas
It is heated, is then consumed energy too high, fume treatment cost is excessively high, causes enterprise that can not bear.This flue gas processing device can be fine
Solution low-temperature flue gas desulphurization denitration, low energy consumption, and equipment cost is low, wide adaptation range, can either realize the place of low-temperature flue gas
Reason, also can adapt to the processing of high-temperature flue gas, and sodium bicarbonate powder is directly mixed with flue gas, right compared with spray solution
The requirement of equipment is low, and reaction efficiency is high.
Embodiment 2
As shown in Fig. 6 ~ 7：Embodiment 2 and embodiment 1 difference lies in：Grinding device setting is in powder conveying pipe 39 and grinds
Between mill apparatus pipe 42, the conveying of sodium bicarbonate powder is realized by the way of negative pressure transportation.Grinding device smoke-intake pipe 38
It is arranged at intervals on 39 downside of powder conveying pipe, and balance pipe is provided between grinding device smoke-intake pipe 38 and powder conveying pipe 39
37, balance pipe 37 is vertically arranged, and the upper end of balance pipe 37 is connected to the middle part of powder conveying pipe 39, the lower end of balance pipe 37 with
Grinding device smoke-intake pipe 38 is connected to, and so as to balance the pressure of grinding device smoke-intake pipe 38 and powder conveying pipe 39, ensures cigarette
Gas and the happy conveying of sodium bicarbonate powder, additionally it is possible to ensure that the flue gas flow rate entered in grinding machine 36 is moderate.
The above descriptions are merely preferred embodiments of the present invention, is not to make other forms to the utility model
Limitation, any person skilled in the art is changed or is modified as possibly also with the technology contents of the disclosure above equivalent
The equivalent embodiment of variation.But it is every without departing from the content of the technical scheme of the utility model, the technology according to the utility model is real
Any simple modification, equivalent variations and remodeling, still fall within the guarantor of technical solutions of the utility model made by confrontation above example
Protect range.
Claims (10)
1. a kind of flue gas processing device, it is characterised in that：Including flue collector（14）, sodium bicarbonate grinding device（7）, powder preheating
Module（6）And dedusting module, flue collector（14）Inlet end be used for pending flue gas input, flue collector（14）Outlet side
It is connected to the inlet end of dedusting module, sodium bicarbonate grinding device（7）Inlet end and flue collector（14）Inlet end connection, carbon
Sour hydrogen sodium grinding device（7）Outlet side and flue collector（14）Connection, powder warm-up block（6）Setting is ground in sodium bicarbonate and is filled
It sets（7）And flue collector（14）Between, dedusting module is wet desulfuration tower or scrubbing tower（13）.
2. flue gas processing device according to claim 1, it is characterised in that：The flue collector（14）Inlet end connection
There is deduster（2）, deduster（2）Outlet side and flue collector（14）Inlet end be connected, deduster（2）Inlet end for waiting locating
Manage the input of flue gas.
3. flue gas processing device according to claim 1 or 2, it is characterised in that：The flue collector（14）Inlet end
It is also associated with chimney meatus draught fan（3）, chimney meatus draught fan（3）Outlet side and flue collector（14）Inlet end connection, flue air inducing
Machine（3）Inlet end pass through auxillary flue（5）With sodium bicarbonate grinding device（7）Inlet end connection, chimney meatus draught fan（3）Go out
Gas end is also by drawing flue（4）With sodium bicarbonate grinding device（7）Inlet end connection, draw flue（4）And auxillary flue（5）
On be both provided with valve.
4. flue gas processing device according to claim 1, it is characterised in that：The sodium bicarbonate grinding device（7）Packet
Include feed bin（34）, grinding machine（36）And powder conveying pipe（39）, feed bin（34）It is arranged in grinding machine（36）Upside, grinding machine（36）Into
Gas end and flue collector（14）Inlet end connection, grinding machine（36）Outlet side pass through powder conveying pipe（39）With flue collector（14）Even
It is logical.
5. flue gas processing device according to claim 4, it is characterised in that：The grinding machine（36）Inlet end be connected with
Grinding device air-introduced machine（40）.
6. flue gas processing device according to claim 5, it is characterised in that：The grinding machine（36）With powder conveying pipe
（39）Between be provided with grader（41）.
7. flue gas processing device according to claim 1, it is characterised in that：The sodium bicarbonate grinding device（7）'s
Outlet side passes through smoke backflow channel（19）With flue collector（14）Connection, powder warm-up block（6）It is arranged in smoke backflow channel
（19）On.
8. flue gas processing device according to claim 1 or claim 7, it is characterised in that：The powder warm-up block（6）Including
Powder heating tube（44）, powder heating tube（44）It is arranged in flue collector（14）With sodium bicarbonate grinding device（7）Between, powder adds
Heat pipe（44）Both ends respectively with flue collector（14）With sodium bicarbonate grinding device（7）Outlet side connection, powder heating tube
（44）On be provided with heating tape.
9. flue gas processing device according to claim 8, it is characterised in that：The powder warm-up block（6）Further include
Input temp sensor（45）And output temperature sensor（46）, input temp sensor（45）It is arranged in powder heating tube
（44）Inlet end, output temperature sensor（46）It is arranged in powder heating tube（44）Outlet side.
10. flue gas processing device according to claim 1, it is characterised in that：The scrubbing tower（13）Including scrubbing tower
Main body, water inlet water pump（9）And into sprinkler head（16）, scrubbing tower body lumen top is provided with multiple into sprinkler head（16）, into
Water water pump（9）Water outlet simultaneously with multiple into sprinkler head（16）It is connected, the inlet end setting of scrubbing tower main body is in lower part, washing
The outlet side of tower main body is arranged on top.
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|---|---|---|---|
| CN201721881960.9U CN207871902U (en) | 2017-12-28 | 2017-12-28 | A kind of flue gas processing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107854993A (en) * | 2017-12-28 | 2018-03-30 | 山东义丰环保机械股份有限公司 | A kind of flue gas processing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107854993A (en) * | 2017-12-28 | 2018-03-30 | 山东义丰环保机械股份有限公司 | A kind of flue gas processing device |
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