CN208244435U - Classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor - Google Patents

Classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor Download PDF

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Publication number
CN208244435U
CN208244435U CN201820481471.2U CN201820481471U CN208244435U CN 208244435 U CN208244435 U CN 208244435U CN 201820481471 U CN201820481471 U CN 201820481471U CN 208244435 U CN208244435 U CN 208244435U
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calcium hydroxide
flue gas
desulfurizing tower
classification
spraying
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汪刚
孙瑞元
于海洋
吕刚
冯想红
冷健
赵强
吕文豪
苟远波
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Xi'an Aerospace Propulsion Engineering Co Ltd
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Xi'an Aerospace Propulsion Engineering Co Ltd
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Abstract

The classification that the utility model discloses a kind of based on spraying-fluidized bed reactor is humidified flue gas desulfurization device, including desulfurizing tower, calcium hydroxide recycles skewed slot, bag filter, first air-introduced machine and chimney, desulfurization tower bottom is provided with gas inlet, exhanst gas outlet is provided at the top of desulfurizing tower, bag filter is connected to smoke outlet, calcium hydroxide circulation skewed slot is connected between bag filter outlet and gas inlet, humidifying device is provided on calcium hydroxide circulation skewed slot, humidifying device is arranged on skewed slot by recycling in calcium hydroxide in the utility model, it is recycled so that calcium hydroxide is re-fed into tower after being humidified outside tower, so that slaked lime powder just contains certain moisture before being humidified in tower, the reaction time of flue gas and calcium hydroxide can be extended, and strengthen the intensity of desulphurization reaction.

Description

Classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor
Technical field
The utility model belongs to flue gases purification field, is related to a kind of flue gas desulfurization device, and in particular to one kind is based on The classification humidification flue gas desulfurization device of spraying-fluidized bed reactor.
Background technique
In existing sulfur method, the difference of water and amount of water whether is added by sweetening process, flue gas desulfurization can be divided into: dry Method, semidry method and wet process.Dry desulfurization method is because cost of material height, low efficiency, application are less;Wet desulphurization application is most, but Be there are burn into white cigarette and be considered as generate haze main inducing the problems such as, need more structurally sound substitute technology; Semi-dry process flue gas desulphurization whether there is or not burn into without waste water, desulfuration efficiency is high the advantages that, increasingly by the concern of desulfurization industry.
At present semi-dry desulphurization technology mainly include CFB circulating fluid bed flue-gas desulfurizing, rotary spraying and drying method (SDA), NID semi-dry desulphurization.But CFB semidry method uses spouted bed as desulfurizing tower, the requirement due to spouted bed to spout velocity, so CFB semi-dry desulphurization is poor to flue gas load variation adaptability, once flue gas load reduces, is easy to happen the bed that collapses;Due to desulfurization Process water needed for reaction sprays into tower, there are material moistures larger, the biggish region of viscosity, and there is material in spouted bed annular space area The slower feature of flow velocity, so wet wall, scale formation easily occurs.The shortcomings that SDA is that desulfurization degree is lower, generally 70-80%, behaviour Work elasticity is smaller, calcium sulfur ratio is high, and operating cost is high, by-product can not utilize.The country using less, operation there are tower wall dust stratification, Atomizer blocks the problems such as serious wear.The reactor of NID semi-dry desulphurization is intended to entrained-flow reactor, and flow velocity is larger, cigarette There is no relative velocity, flue gas and material shorter in the residence time of reactor between gas and particulate matter;And after being mixed with water Desulfurizing agent specific surface area it is small, sorbent utilization is lower, and operating cost is higher.
So the most important problem of semi-dry desulphurization is that the contradiction between desulfuration efficiency and calcium hydroxide consumption etc. is asked at present Topic and collapse bed and fouling the problems such as.
Summary of the invention
In view of the deficiencies in the prior art, the utility model provides a kind of based on spraying-fluidized bed reactor Classification humidification flue gas desulfurization device, solves the problems, such as low existing desulphurization system desulfuration efficiency, the easy bed that collapses, fouling.
In order to solve the above-mentioned technical problem, the utility model adopts the following technical solution is achieved:
A kind of classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor, including desulfurizing tower, calcium hydroxide circulation Skewed slot, bag filter, the first air-introduced machine and chimney, the desulfurization tower bottom are provided with gas inlet, setting at the top of desulfurizing tower There is exhanst gas outlet, the bag filter is connected to smoke outlet, and the calcium hydroxide circulation skewed slot is connected to bag filter Between outlet and gas inlet, flue gas is passed sequentially through after gas inlet, desulfurizing tower, bag filter under air-introduced machine effect from cigarette Chimney discharge, the extra calcium hydroxide after reaction, which successively enters desulfurizing tower circulation after bag filter, calcium hydroxide circulation skewed slot, to be made With;
Described device further includes humidifying device, and the humidifying device setting is on calcium hydroxide circulation skewed slot, the humidification dress Set slope aspect desulfurizing tower direction;The humidifying device includes calcium hydroxide mixing chamber, gas chamber and fluidizer, the calcium hydroxide mixing chamber It is penetrated through with gas chamber, the fluidizer is arranged between calcium hydroxide mixing chamber and gas chamber;The gas chamber by the second air-introduced machine with The connection of desulfurizing tower gas inlet introduces flue gas in the gas chamber from desulfurizing tower gas inlet;It is provided with and disappears on the mixing chamber Lime inlet, calcium hydroxide outlet and water jet, the calcium hydroxide entrance and calcium hydroxide outlet are on calcium hydroxide circulation skewed slot.
The utility model also has following distinguishing feature:
Calcium hydroxide mixing chamber bottom is connect after gradually tapering up with gas chamber, the length and gas chamber of the calcium hydroxide mixing chamber Length it is identical;Double fluid atomization nozzle is provided on the water jet, being relatively large in diameter for mixing chamber is arranged in the water jet Section.
The gradient of the humidifying device is greater than 15%;The overall width of the humidifying device is the 2 times or more of skewed slot width, The whole height of humidifying device is 3 times or more of skewed slot height.
The desulfurization tower bottom is reverse tapered shape, and gas distributor is arranged at the back taper of desulfurizing tower.
The gas distributor is perforated plate construction, and the porous plate is the back taper with desulfurizing tower bottom mating.
Level-one injection spray pipe and second level injection spray pipe are disposed in the desulfurizing tower from top to bottom, the level-one injection spray pipe has It is multiple, it is circumferentially uniformly distributed along desulfurizing tower, the second level injection spray pipe has multiple, is circumferentially uniformly distributed along desulfurizing tower.
The desulfurization tower bottom is reverse tapered shape, and the level-one injection spray pipe is arranged more than desulfurizing tower reverse taper top edge At 950~1050mm;The second level injection spray pipe is arranged below level-one injection spray pipe at 5~7mm.
Venturi nozzle is provided at the gas inlet.
The exit of the bag filter is provided with slag-draining device.
The calcium hydroxide inlet of the calcium hydroxide circulation skewed slot is provided with controlled valve and control valve.
Compared with prior art, the utility model has the beneficial effects that
The utility model by calcium hydroxide recycle skewed slot on humidifying device is set so that calcium hydroxide be humidified outside tower after again It is sent into tower to recycle, so that slaked lime powder just contains certain moisture before being humidified in tower, flue gas and calcium hydroxide can be extended Reaction time, and strengthen the intensity of desulphurization reaction;
The humidifying device of the utility model is using fluidisation mixed form, using the indoor hot fume of gas as fluidized wind, so Water is sprayed into calcium hydroxide mixing chamber afterwards, makes calcium hydroxide in humidification process always in fluidized state, and with the water of ejection quickly, Uniformly mixing, hot fume can avoid calcium hydroxide agglomerate in mixing chamber, fouling.
Other feature and advantage of the utility model will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Fig. 1 is the utility model overall system view.
Fig. 2 a is the front view of the humidifying device of the utility model.
Fig. 2 b is the side view of the humidifying device of the utility model.
Each label indicates in figure are as follows: 1- desulfurizing tower, 2- calcium hydroxide recycle skewed slot, 3- bag filter, the first air inducing of 4- Machine, 5- chimney, 6- gas inlet, 7- humidifying device, 8- gas distributor, 9- slag-draining device, 10- controlled valve, 11- regulating valve Door, the second air-introduced machine of 12-;
(7-1)-calcium hydroxide mixing chamber, (7-2)-gas chamber, (7-3)-fluidizer;
(7-1-1)-calcium hydroxide entrance, the outlet of (7-1-2)-calcium hydroxide, (7-1-3)-water jet.
Explanation is further explained in detail below in conjunction with particular content of the drawings and specific embodiments to the utility model.
Specific embodiment
Be given below specific embodiment of the present utility model, it should be noted that the utility model be not limited to it is following Specific embodiment, all equivalent transformations made on the basis of the technical solutions of the present application each fall within the protection scope of the utility model.
In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower ", " bottom, top What portion " typically referred to define on the basis of the drawing of respective drawings, " inside and outside " refers to the inner and outer of corresponding component profile.
The flue gas desulfurization as shown in Figure 1, classification that the utility model discloses a kind of based on spraying-fluidized bed reactor is humidified Device, including desulfurizing tower 1, calcium hydroxide circulation skewed slot 2, bag filter 3, the first air-introduced machine 4 and chimney 5,1 bottom of desulfurizing tower are set It is equipped with gas inlet 6, exhanst gas outlet is provided at the top of desulfurizing tower, bag filter 3 is connected to smoke outlet, calcium hydroxide circulation Skewed slot 2 is connected between the outlet of bag filter 3 and gas inlet 6, and flue gas passes sequentially through gas inlet 6, desulfurizing tower 1, cloth bag It is discharged under air-introduced machine effect from chimney 5 after deduster 3, the extra calcium hydroxide after reaction successively passes through bag filter 3, niter Enter desulfurizing tower 1 after ash circulation skewed slot 2 to be recycled;
The device further includes humidifying device 7, and the setting of humidifying device 7 is on calcium hydroxide circulation skewed slot 2,7 slope aspect of humidifying device 1 direction of desulfurizing tower;Humidifying device 7 includes calcium hydroxide mixing chamber 7-1, gas chamber 7-2 and fluidizer 7-3, calcium hydroxide mixing chamber 7- 1 and gas chamber 7-2 perforation, fluidizer 7-3 are arranged between calcium hydroxide mixing chamber 7-1 and gas chamber 7-2;Gas chamber 7-2 passes through second Air-introduced machine 12 is connect with desulfurizing tower gas inlet 6, and flue gas is introduced in gas chamber 7-2 from desulfurizing tower gas inlet 6;Mixing chamber 7-1 On be provided with calcium hydroxide entrance 7-1-1, calcium hydroxide outlet 7-1-2 and water jet 7-1-3, calcium hydroxide entrance 7-1-1 and calcium hydroxide 7-1-2 connection is exported on calcium hydroxide circulation skewed slot 2.The humidifying device of the utility model is using fluidisation mixed form, by former cigarette Gas introduces gas chamber, using the indoor hot fume of gas as fluidized wind, water is then sprayed into calcium hydroxide mixing chamber, is increasing calcium hydroxide Always it is in fluidized state during wet, and quickly, is uniformly mixed with the water of ejection, hot fume can avoid calcium hydroxide in mixing chamber Interior agglomeration, fouling.
Humidifying device is arranged on skewed slot by recycling in calcium hydroxide in the utility model, so that circulation slaked lime powder contains centainly Moisture, extend flue gas and calcium hydroxide reaction time, strengthen the intensity of desulphurization reaction;
Specifically, as shown in Figure 2 b, the bottom calcium hydroxide mixing chamber 7-1 is connect after gradually tapering up with gas chamber 7-2, calcium hydroxide The length of mixing chamber 7-1 is identical as the length of gas chamber 7-2;Double fluid atomization nozzle, technique water mist are provided on water jet 7-1-3 Change liquid-drop diameter less than 40 μm, nozzle spray distance is not more than the 2/3 of humidifying device width, on the one hand atomizer offsets rapidly Pulverized limestone is humidified, and on the other hand avoids water spray that slaked lime powder is caused to agglomerate again, leads to blocking in mixing chamber.
Best, what water jet 7-1-3 was arranged in mixing chamber is relatively large in diameter section.May insure to be sprayed onto this way material compared with Dense region.
Specifically, the gradient of humidifying device 7 is greater than 15%;The overall width of humidifying device 7 be 2 times of skewed slot width with On, the whole height of humidifying device is 3 times or more of skewed slot height.It can control water spray agglomeration caused by slaked lime powder in this way Phenomenon, so that mixing the water content of indoor calcium hydroxide in claimed range.
Specifically, slaked lime powder entrance is arranged in desulfurizing tower cone as shown in Figure 1,1 bottom of desulfurizing tower is reverse tapered shape Portion.
Further, as shown in Figure 1, in one embodiment of the utility model, it is arranged at the back taper of desulfurizing tower 1 Gas distributor 8, flue gas enter in desulfurizing tower by gas distributor, and the annular space area of spouted fluidized bed can be made to generate fluidisation, prevented Only there is wet wall and scale formation in desulfurizing tower.
Specifically, gas distributor 8 is perforated plate construction, porous plate is the back taper with 1 bottom mating of desulfurizing tower, porous The reversed cone angle of plate is 60 °, and the percent opening of distribution grid can be determined according to the size of exhaust gas volumn.
Further, it is disposed with level-one spray from top to bottom in one embodiment of the utility model, in desulfurizing tower 1 Mist pipe and second level injection spray pipe, level-one injection spray pipe have multiple, are circumferentially uniformly distributed along desulfurizing tower, second level injection spray pipe have it is multiple, along de- Sulphur tower is circumferentially uniformly distributed.It is classified humidification slaked lime powder by using classification work of water sprinkling for better material moisture, makes slaked lime powder in desulfurizing tower It is always maintained at containing certain aqueous water;Desulfurizing tower is more than venturi nozzle until sack cleaner is all de- as flue gas Reaction of Salmon-Saxl section;And by classification humidification, calcium hydroxide contains certain aqueous water always, not only extends flue gas and calcium hydroxide Reaction time, and strengthen the intensity of desulphurization reaction;It is humidified additionally, due to classification, water spray is not once to spray into, and be can avoid The phenomenon that calcium hydroxide moisture is excessive in a period of time, easily frees viscous wall, fouling.
Specifically, level-one injection spray pipe and second level injection spray pipe use four two-fluid solid nozzles.
Specifically, level-one injection spray pipe is arranged more than desulfurizing tower reverse taper top edge at 950~1050mm, preferably At 1000mm, this is because the slaked lime powder moisture that humidifying device is humidified outside tower is here i.e. by evaporating completely.Specifically, second level Injection spray pipe is arranged more than level-one injection spray pipe at 5~7mm.
Further, in one embodiment of the utility model, venturi nozzle is provided at gas inlet 6.Specifically Can be according to the size of exhaust gas volumn, it can be using single venturi nozzle or more venturi nozzles, by the way that venturi nozzle conduct is arranged Injector can not only promote the mass transfer between flue gas and slaked lime powder, conduct heat, moreover it is possible to be effectively prevented the appearance of annular space area bottom Dead zone and relatively viscous particle are in the reunion of annular space area, viscous wall.
Further, as shown in Figure 1, in one embodiment of the utility model, the exit of bag filter 3 is set It is equipped with slag-draining device 9, for collecting the desulfurization slag after desulphurization reaction.
Further, as shown in Figure 1, in one embodiment of the utility model, calcium hydroxide recycles the calcium hydroxide of skewed slot 2 Inlet is provided with controlled valve 10 and control valve 11.It, can for the size of control loop calcium hydroxide being passed through with intake According to the deviation of the detected value and design value of produce load and exhaust gas volumn, adjusts skewed slot control valve 11 or close skewed slot switch valve Door 10, is adjusted desulphurization circulating flue.
The use process of the utility model are as follows:
After inlet plenum rectifies, the gas inlet 6 through desulfurization tower bottom enters former flue gas, sprays by venturi nozzle Desulfurizing tower, the I and II water spray on desulfurizing tower spray into process water appropriate according to flue-gas temperature and desulfuration efficiency requirement;Flue gas Desulphurization reaction is carried out with the slaked lime powder after humidification in desulfurizing tower 1.High concentration ash-laden gas is from the top of desulfurizing tower 1 after desulfurization Outlet is discharged into 3 dedusting of bag filter, and the neat stress after 3 dedusting of bag filter is discharged into chimney by the first air-introduced machine 4, passes through The slaked lime powder that bag filter 3 traps is sent to humidifying device 7 by calcium hydroxide circulation skewed slot 2 and is humidified, makes to disappear After pulverized limestone contains certain water content, send to desulfurizing tower cycling and reutilization.
It is further to note that specific technical features described in the above specific embodiments, in not lance In the case where shield, it can be combined in any appropriate way, it is same as long as it is without prejudice to the thought of the utility model It should be considered as content disclosed in the utility model.

Claims (10)

  1. The flue gas desulfurization device 1. a kind of classification based on spraying-fluidized bed reactor is humidified, including desulfurizing tower (1), calcium hydroxide follow Ring skewed slot (2), bag filter (3), the first air-introduced machine (4) and chimney (5), desulfurizing tower (1) bottom be provided with flue gas into Mouth (6), desulfurizing tower top are provided with exhanst gas outlet, and the bag filter (3) is connected to smoke outlet, and the calcium hydroxide follows Ring skewed slot (2) is connected between bag filter (3) outlet and gas inlet (6), and flue gas passes sequentially through gas inlet (6), takes off It is discharged under air-introduced machine effect from chimney (5) after sulphur tower (1), bag filter (3), the extra calcium hydroxide after reaction successively passes through Bag filter (3), calcium hydroxide circulation skewed slot (2) enter desulfurizing tower (1) afterwards and are recycled;
    It is characterized in that, described device further includes humidifying device (7), humidifying device (7) setting recycles skewed slot in calcium hydroxide (2) on, humidifying device (7) slope aspect desulfurizing tower (1) direction;The humidifying device (7) include calcium hydroxide mixing chamber (7-1), Gas chamber (7-2) and fluidizer (7-3), the calcium hydroxide mixing chamber (7-1) and gas chamber (7-2) perforation, the fluidizer (7- 3) it is arranged between calcium hydroxide mixing chamber (7-1) and gas chamber (7-2);The gas chamber (7-2) passes through the second air-introduced machine (12) and de- Sulphur tower flue gas import (6) connection introduces flue gas in the gas chamber (7-2) from desulfurizing tower gas inlet (6);The mixing chamber Calcium hydroxide entrance (7-1-1), calcium hydroxide outlet (7-1-2) and water jet (7-1-3), the calcium hydroxide is provided on (7-1) to enter Mouth (7-1-1) is connected in calcium hydroxide circulation skewed slot (2) with calcium hydroxide outlet (7-1-2).
  2. 2. the classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor, feature exist as described in claim 1 In calcium hydroxide mixing chamber (7-1) bottom is connect after gradually tapering up with gas chamber (7-2), the calcium hydroxide mixing chamber (7-1) Length is identical as the length of gas chamber (7-2);Double fluid atomization nozzle, the water jet are provided on the water jet (7-1-3) What (7-1-3) was arranged in mixing chamber is relatively large in diameter section.
  3. 3. the classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor, feature exist as described in claim 1 In the gradient of the humidifying device (7) is greater than 15%;The overall width of the humidifying device (7) be 2 times of skewed slot width with On, the whole height of humidifying device is 3 times or more of skewed slot height.
  4. 4. the classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor, feature exist as described in claim 1 In desulfurizing tower (1) bottom is reverse tapered shape, and gas distributor (8) are arranged at the back taper of desulfurizing tower (1).
  5. 5. the classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor, feature exist as claimed in claim 4 In the gas distributor (8) is perforated plate construction, and the porous plate is the back taper with desulfurizing tower (1) bottom mating.
  6. 6. the classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor, feature exist as described in claim 1 In the desulfurizing tower (1) is interior to be disposed with level-one injection spray pipe and second level injection spray pipe from top to bottom, and the level-one injection spray pipe has more It is a, it is circumferentially uniformly distributed along desulfurizing tower, the second level injection spray pipe has multiple, is circumferentially uniformly distributed along desulfurizing tower.
  7. 7. the classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor, feature exist as claimed in claim 6 In desulfurizing tower (1) bottom is reverse tapered shape, and the level-one injection spray pipe is arranged 950 more than desulfurizing tower reverse taper top edge At~1050mm;The second level injection spray pipe is arranged below level-one injection spray pipe at 5~7mm.
  8. 8. the classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor, feature exist as described in claim 1 In being provided with venturi nozzle at the gas inlet (6).
  9. 9. the classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor, feature exist as described in claim 1 In the exit of the bag filter (3) is provided with slag-draining device (9).
  10. 10. the classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor, feature exist as described in claim 1 In the calcium hydroxide inlet of calcium hydroxide circulation skewed slot (2) is provided with controlled valve (10) and control valve (11).
CN201820481471.2U 2018-03-30 2018-03-30 Classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor Active CN208244435U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110975583A (en) * 2019-12-19 2020-04-10 哈尔滨蔚蓝环保设备制造有限公司 Semidry flue gas desulfurization device
CN111420545A (en) * 2019-01-10 2020-07-17 国家电投集团远达环保工程有限公司重庆科技分公司 Desulfurization reaction tower and flue gas desulfurization device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111420545A (en) * 2019-01-10 2020-07-17 国家电投集团远达环保工程有限公司重庆科技分公司 Desulfurization reaction tower and flue gas desulfurization device
CN110975583A (en) * 2019-12-19 2020-04-10 哈尔滨蔚蓝环保设备制造有限公司 Semidry flue gas desulfurization device

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