CN206996258U - Flyash desulfurizer - Google Patents

Flyash desulfurizer Download PDF

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Publication number
CN206996258U
CN206996258U CN201720710495.6U CN201720710495U CN206996258U CN 206996258 U CN206996258 U CN 206996258U CN 201720710495 U CN201720710495 U CN 201720710495U CN 206996258 U CN206996258 U CN 206996258U
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pump
tank
flue
flyash
valve
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CN201720710495.6U
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Inventor
马宗瑜
马怡琳
冯铁恒
玄兆臣
岂付春
刘春美
郭利亚
杨栋
杨朋
樊学红
胡丽丽
陈守云
韩玉杰
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Tangshan Jinsha Burning Heat Energy Ltd By Share Ltd
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Tangshan Jinsha Burning Heat Energy Ltd By Share Ltd
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Abstract

It the utility model is related to a kind of flyash desulfurizer, including the conveying of cigarette wind devices, slurries Preparation equipment, slurries and recycle unit, desulphurization plant and control device;Described cigarette wind devices include flue, fresh-air duct road, compensator, flue by-passing valve and flue gas electric control valve;Described slurries Preparation equipment includes electric cinder valve, pulping tank and stirring motor;Described desulphurization plant includes desulfurizing tower, circulating tank, loop slurry spray piping and demister;Described desulfurizing tower includes housing, bottom plate, inlet and outlet flue, external reinforcement rib and internal unit supporting construction;Described circulating tank includes tank body and stirring motor;Totally four layers of described loop slurry spray piping, is divided into two groups;Described demister includes two layers of demister piece, four layers of demister backwashing water pipeline;The utility model, which has, to be easily installed, and load regulation range is wide, and fault rate is low, and is easy to safeguard, the advantages of service life is long.

Description

Flyash desulfurizer
Technical field
It the utility model is related to a kind of flue gas desulfurization device, and in particular to the flyash in a kind of pulverized-coal fired boiler corollary equipment Desulfurizer.
Background technology
At present, greenhouse effects, air quality acute exacerbation, water pollution and extensive acid deposition contamination phenomenon are increasingly apparent. Carry out global climate and environmental protection, it is the dedusting of smoke gas treatment, desulfurization integrated, evil, comprehensive utilization, comprehensive exploitation are controlled with useless, It is one of major measure, and reduces the most effective approach of scrubbing CO_2 cost.It has been investigated that the raw coal warp of thermal power plant The flyash discharged after boiler combustion originally belongs to solid waste, useless, is harmful to, and amount is big, and more, and its acid-base value is typically in 8.5- 13 or so.And flyash is a kind of porous mass and specific surface area is larger, itself contains about 16-20% calcium oxide component and one A little uncombusted charcoals, so flyash has certain active group, to SO2There is certain adsorption capacity.Secondly, in flyash The alkaline matter such as calcium oxide be dissolved in water after, its solution alkaline, SO soluble in water can be absorbed2.Utilize flyash generation Alkaline slurry carries out desulfurization, and one kind effectively in calcium-based desulfurizing agent.If its alkalescence is applied into desulfurization, according to medium inclined Lower principle calculates the sweetening substance in pulverized fuel ash slurry, is in the case of coal-fired sulfur content 3% more than 4 times, it is seen that be enough to be used in taking off Sulphur.
For the traditional such as electrostatic precipitation in domestic and international coal-burning power plant -- desulfurization of gypsum dedusting, sulfur removal technology, its flow are deposited It is cumbersome, complicated, involve great expense, operating cost is high, treatment effeciency is low, there are the various problems such as secondary pollution, This is also one of balky basic reason of smoke gas treatment.It is dust so reducing dedusting, the cost and operating cost of desulfurization With sulphur, nitrogen, oxycarbide pollution control basic place.According to the constituent, physical property and chemical property of flyash, lead to After wet method is crossed to its modification, its hiding activity internally can be excited, improves desulfurization degree.Choosing is prepared using flyash The SO that selecting property is good, adsorption capacity is big, adsorption efficiency is high2Adsorbent, removing coal combustion exhaust SO2, evil, and desulfurization technology are controlled with useless Development trend.
Utility model content
The utility model can not be accomplished to reduce the cost of desulfurization and the deficiency of operating cost for existing desulfurizer, there is provided A kind of energy-efficient, safety and environmental protection flyash desulfurizer.The technical problems to be solved in the utility model passes through following technology Scheme is realized.
A kind of flyash desulfurizer, including the conveying of cigarette wind devices, slurries Preparation equipment, slurries and recycle unit, desulfurization Equipment and control device;
Described cigarette wind devices include flue, fresh-air duct road, compensator, flue by-passing valve and flue gas motorized adjustment Valve, flue by-passing valve is closed during work, and sulfur-bearing caused by the boiler combustion after sack cleaner dedusting gives up The gas approach that flue gas is tilted down through flue by air-introduced machine by desulfurizing tower enters in desulfurizing tower, by net gas after desulfurization Pipeline enters in chimney, subsequent discharges into air;
Described slurries Preparation equipment includes electric cinder valve, pulping tank and stirring motor, the fine coal being stored in ash silo Ash is delivered in pulping tank by electric cinder valve, carries out plus water mixes;
Described slurries conveying and recycle unit include pump for mortar transmission, circulating pump, Pulp pump, vacuum filter and matched Valve and flowmeter;
Described desulphurization plant includes desulfurizing tower, circulating tank, loop slurry spray piping and demister;Described desulfurizing tower Including housing, bottom plate, inlet and outlet flue, external reinforcement rib and internal unit supporting construction;Described circulating tank includes tank body and stirred Mix motor;Totally four layers of described loop slurry spray piping, is divided into two groups;Described demister includes two layers demister piece, four Layer demister backwashing water pipeline;
Described control device include be located at each pipeline in multiple sensors, multiple PLCs, data/address bus, on Position machine, control cabinet and PLC rack, each sensor control the data information transfer collected to host computer, PC control PLC Device, PLC control the open and close of each pump, valve;
By compressed air by the ash transfer in boiler tail storehouse pump and sack cleaner to ash silo, by under ash silo The flyash in portion, which is collected into pulping tank, is made pulverized fuel ash slurry, and pulverized fuel ash slurry is delivered to following for desulfurization tower bottom by pump for mortar transmission Stored in ring tank, circulating pump pulverized fuel ash slurry is delivered in the loop slurry spray piping in the middle part of desulfurizing tower and from nozzle with Under the spray of water smoke form;Meanwhile flue by-passing valve is closed, the sulfur-bearing flue gas after sack cleaner dedusting is by drawing The gas approach that blower fan flows through the flue where flue gas electric control valve and tilted down from desulfurization tower bottom pours in desulfurization In tower, column plate guiding in the presence of rotation rise and with mist-like pulverized fuel ash slurry counter current contacting, so as to absorb in flue gas Sulfide;Flue gas after absorption is entered in demister and drawn after progress dewater treatment by desulfurizing tower top, after chimney It is discharged into air;Desulfurization product is discharged and is delivered in vacuum filter by Pulp pump with pulverized fuel ash slurry, then by automatic loading and unloading Car transports filtrate;Slurries after vacuum filter filters are flowed into sedimentation basin, and slurrying is delivered to by reflux pump after precipitation In tank and circulating tank.
Further, described desulfurizing tower is using ordinary carbon steel and glass inner-lining scale paint, outside acid washing phosphorization and two bottoms The mode of two finish paints is made, and its pipeline is laid according to the 0.002-0.003 gradient, and external heating and insulation construction.In this way, On the premise of increasing the service life, it can be achieved to reduce cost, solve the problems, such as preventing freeze in winter, take into account attractive in appearance and practicality.
Further, described pump for mortar transmission, circulating pump and Pulp pump use wear resistant corrosion resistant pump, when it selects pony pump When, its shaft seal uses K-type dynamic seal, and when it selects mammoth pump, its shaft seal is using the sealing or double of Z-type self-balancing End face integrated mechanical sealing.
Further, two are set into the flue of desulfurizing tower, one is provided with regulating valve, another small work(of conduct Flue when rate is run is not provided with regulating valve;Described slurries conveying is corresponding with recycle unit, loop slurry spray piping Set two sets.In this way, individually but also can not only co-operate, and switching undisturbed can be realized, greatly improve operating efficiency.
Further, the tank body of the pulping tank is made using the stainless steel of wear resistant corrosion resistant, and portion in the inner It is provided with pH monitors and tank gage.
Further, described nozzle is made of the carborundum of wear resistant corrosion resistant, and each layer nozzle top-bottom cross staggers Arranged.So so that each spray region has identical spray flux density, so as to which fully reaction occur with flue gas
Further, described demister upper and lower ends are respectively provided with backwashing water pipeline, and backwashing water pipeline is through recoil Wash pump with water tank to be connected, water tank access tap water pipe network.
Further, described fresh-air duct road afterbody carries out preservative treatment, and sets water fender in its minimum point and put The mouth of a river.So as to prevent the flue-gas temperature of fresh-air duct road afterbody too low and caused by boiler flue corrosion.
Further, in addition to lime tank, described lime tank are connected through pipeline and valve with pulping tank.
Pulverized fuel ash slurry contacts in desulfurizing tower with sulfur-containing smoke gas occurs absorbing reaction, and the afwillite of generation can promote Gas, solid diffusion and increase specific surface area, also with high water retention property, keep desulfurizing agent surface wettability in mortar, strengthen between gas-liquid The sour gas such as reaction, sulfur dioxide, sulfur trioxide in flue gas just absorbed in the process.
Compared with prior art, the unique structure of flyash desulfurizer is novel, and complete equipment is easily installed, Load Regulation Scope is wide, and fault rate is low, and is easy to safeguard, service life length;Abundant, efficient exhaust gas dust absorption can be handled, And the waste product flyash discharged in industrial processes can be changed into absorbent and be made full use of, safety and environmental protection, energy-saving and emission-reduction. By supporting programme-control, whole system can realize stabilization, accurate automatic operating, substantially increase operating efficiency, And reduce artificial input.The utility model can control evil, comprehensive utilization, comprehensive exploitation with useless, substantially reduce cost and running cost With treatment effeciency is high, and simple to operate, non-secondary pollution reaches the requirement of energy-conserving and environment-protective, and can be widely used in smoke gas treatment neck Domain.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present utility model;
Fig. 2 is the structural representation of desulfurizing tower of the present utility model;
Reference in accompanying drawing is followed successively by:1st, boiler, 2, storehouse pump, 3, sack cleaner, 4, ash silo, 5, lime tank, 6, Pulping tank, 7, pump for mortar transmission, 8, circulating tank, 9, circulating pump, 10, desulfurizing tower, 11, air-introduced machine, 12, flue by-passing valve, 13, flue gas electricity Dynamic regulating valve, 14, Pulp pump, 15, vacuum filter, 16, lift truck, 17, sedimentation basin, 18, reflux pump, 19, running water Pipe network, 20, water tank, 21, anti-cleaning pump.
Embodiment
Design feature of the present utility model is expanded on further with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1:
Reference picture 1,2, a kind of flyash desulfurizer, including the conveying of cigarette wind devices, slurries Preparation equipment, slurries and circulation Equipment, desulphurization plant and control device;
Described cigarette wind devices include flue, fresh-air duct road, compensator, flue by-passing valve 12 and flue gas motorized adjustment Valve 13, flue by-passing valve 12 is closed during work, caused by the boiler 1 after the dedusting of sack cleaner 3 burns The gas approach that sulfur-bearing flue gas is tilted down through flue by air-introduced machine 11 by desulfurizing tower 10 enters in desulfurizing tower 10, warp Entered after desulfurization by fresh-air duct road in chimney, subsequent discharged into air;
Described slurries Preparation equipment includes electric cinder valve, pulping tank 6 and stirring motor, the powder being stored in ash silo 4 Coal ash is delivered in pulping tank 6 by electric cinder valve, carries out plus water mixes;
Described slurries conveying and recycle unit include pump for mortar transmission 7, circulating pump 9, Pulp pump 14, vacuum filter 15 and The valve and flowmeter to match;
Described desulphurization plant includes desulfurizing tower 10, circulating tank 8, loop slurry spray piping and demister;Described is de- Sulphur tower 10 includes housing, bottom plate, inlet and outlet flue, external reinforcement rib and internal unit supporting construction;Described circulating tank 8 includes tank Body and stirring motor;Totally four layers of described loop slurry spray piping, is divided into two groups;Described demister includes two layers of demister Piece, four layers of demister backwashing water pipeline;
Described control device include be located at each pipeline in multiple sensors, multiple PLCs, data/address bus, on Position machine, control cabinet and PLC rack, each sensor control the data information transfer collected to host computer, PC control PLC Device, PLC control the open and close of each pump, valve;
By compressed air by ash transfer to the ash silo 4 in the afterbody storehouse pump 2 of boiler 1 and sack cleaner 3, by ash The flyash of the bottom of storehouse 4, which is collected into pulping tank 6, is made pulverized fuel ash slurry, and pulverized fuel ash slurry is delivered to desulfurizing tower by pump for mortar transmission 7 Stored in the circulating tank 8 of 10 bottoms, pulverized fuel ash slurry is delivered to the loop slurry spray piping at the middle part of desulfurizing tower 10 by circulating pump 9 It is interior and from nozzle in the form of water smoke spray under;Meanwhile flue by-passing valve 12 is closed, after the dedusting of sack cleaner 3 Sulfur-bearing flue gas flowed through by air-introduced machine 11 flue where flue gas electric control valve 13 and from the bottom of desulfurizing tower 10 to Under inclined gas approach pour in desulfurizing tower 10, column plate guiding in the presence of rotation rise and with mist-like pulverized fuel ash slurry Counter current contacting, so as to absorb the sulfide in flue gas;Flue gas after absorption is entered in demister after progress dewater treatment Drawn by the top of desulfurizing tower 10, be discharged into after chimney in air;Desulfurization product is discharged and defeated with pulverized fuel ash slurry by Pulp pump 14 Deliver in vacuum filter 15, then transported filtrate by lift truck 16;Slurry stream after the filtering of vacuum filter 15 Enter in sedimentation basin 17, be delivered to after precipitation by reflux pump 18 in pulping tank 6 and circulating tank 8.
Embodiment 2:
On the basis of embodiment 1, described desulfurizing tower 10 uses ordinary carbon steel and glass inner-lining scale paint, outside pickling Phosphatization and the mode of the finish paint of two bottom two are made, and its pipeline is laid according to the 0.002-0.003 gradient, and external heating and insulation knot Structure.
Embodiment 3:
On the basis of embodiment 2, described pump for mortar transmission 7, circulating pump 9 and Pulp pump 14 use wear resistant corrosion resistant pump, When it selects pony pump, its shaft seal uses K-type dynamic seal, and when it selects mammoth pump, its shaft seal uses Z-type Self-balancing seals or Double End integrated mechanical sealing.
Embodiment 4:
On the basis of embodiment 3, the flue into desulfurizing tower 10 sets two, and one is provided with regulating valve, separately One flue when being run as small-power is not provided with regulating valve;Described slurries conveying and recycle unit, loop slurry Two sets of spray piping relative set.
Embodiment 5:
On the basis of embodiment 4, the tank body of the pulping tank 6 is made using the stainless steel of wear resistant corrosion resistant, and Portion is provided with pH monitors and tank gage in the inner.
Embodiment 6:
On the basis of embodiment 5, described nozzle is made of the carborundum of wear resistant corrosion resistant, and each layer nozzle is handed over up and down Pitch staggered arrangement;Described demister upper and lower ends are respectively provided with backwashing water pipeline, and backwashing water pipeline is through backwashing pump 21 are connected with water tank 20, and water tank 20 accesses tap water pipe network 19;Described fresh-air duct road afterbody carries out preservative treatment, and in it most Low spot sets water fender and dewatering outlet;Also include lime tank 5, described lime tank 5 is connected through pipeline and valve with pulping tank 6 Connect.
The chemical reaction mechanism of the utility model flyash desulfurization is:
Ca(OH)2+SiO2+H2O→(CaO)x(SiO2)y(H2O)z (1)
Ca(OH)2+Al2O3+H2O→(CaO)x(Al2O3)y(H2O)z (2)
Ca(OH)2+SiO2+Al2O3+H2O→
(CaO)x(Al2O3)y(SiO2)z(H2O)w (3)
Ca(OH)2+Al2O3+SO2+H2O→
(CaO)x(Al2O3)y(CaSO3)z(H2O)w (4)
The afwillite of generation can promote gas, solid diffusion and increase specific surface area, also with high water retention property, keep slurry Desulfurizing agent surface wettability in liquid, strengthen the reaction between gas-liquid, be finally reached qualified fume emission index:Sulfur dioxide SO2≤ 20mg/Nm3, soot dust granule thing≤10mg/Nm3
Embodiment described above only expresses a kind of embodiment of the present utility model, but can not therefore be interpreted as Limitation to the scope of the utility model.It should be pointed out that for the person of ordinary skill of the art, it is new not departing from this practicality On the premise of type is conceived, various modifications and improvements can be made.These belong to the scope of protection of the utility model.

Claims (9)

1. a kind of flyash desulfurizer, including the conveying of cigarette wind devices, slurries Preparation equipment, slurries and recycle unit, desulfurization are set Standby and control device;It is characterized in that:
Described cigarette wind devices include flue, fresh-air duct road, compensator, flue by-passing valve(12)With flue gas electric control valve (13), flue by-passing valve during work(12)It is closed, by sack cleaner(3)Boiler after dedusting(1)Burning institute Caused sulfur-bearing flue gas passes through air-introduced machine through flue(11)By desulfurizing tower(10)The gas approach tilted down enters de- Sulphur tower(10)It is interior, entered after desulfurization by fresh-air duct road in chimney, subsequent discharged into air;
Described slurries Preparation equipment includes electric cinder valve, pulping tank(6)And stirring motor, it is stored in ash silo(4)In powder Coal ash is delivered to pulping tank by electric cinder valve(6)In, carry out plus water mixes;
Described slurries conveying and recycle unit include pump for mortar transmission(7), circulating pump(9), Pulp pump(14), vacuum filter(15) And the valve and flowmeter to match;
Described desulphurization plant includes desulfurizing tower(10), circulating tank(8), loop slurry spray piping and demister;Described is de- Sulphur tower(10)Including housing, bottom plate, inlet and outlet flue, external reinforcement rib and internal unit supporting construction;Described circulating tank(8)Bag Include tank body and stirring motor;Totally four layers of described loop slurry spray piping, is divided into two groups;Described demister removes including two layers Day with fog piece, four layers of demister backwashing water pipeline;
Described control device include be located at each pipeline in multiple sensors, multiple PLCs, data/address bus, host computer, Control cabinet and PLC rack, each sensor is by the data information transfer collected to host computer, PC control PLC, PLC controls the open and close of each pump, valve;
By compressed air by boiler(1)Afterbody storehouse pump(2)And sack cleaner(3)Interior ash transfer is to ash silo(4)It is interior, By ash silo(4)The flyash of bottom is collected into pulping tank(6)In pulverized fuel ash slurry, pump for mortar transmission is made(7)Pulverized fuel ash slurry is defeated Deliver to desulfurizing tower(10)The circulating tank of bottom(8)Middle storage, circulating pump(9)Pulverized fuel ash slurry is delivered to desulfurizing tower(10)Middle part Loop slurry spray piping in and from nozzle in the form of water smoke spray under;Meanwhile flue by-passing valve(12)It is closed, Through sack cleaner(3)Sulfur-bearing flue gas after dedusting passes through air-introduced machine(11)Flow through flue gas electric control valve(13)The cigarette at place Feed channel and from desulfurizing tower(10)The gas approach that bottom tilts down pours in desulfurizing tower(10)It is interior, in the presence of column plate guiding Rotation rise and with mist-like pulverized fuel ash slurry counter current contacting, so as to absorb the sulfide in flue gas;Flue gas after absorption Enter after the interior progress dewater treatment of demister by desulfurizing tower(10)Top is drawn, and is discharged into after chimney in air;Desulfurization product With pulverized fuel ash slurry by Pulp pump(14)Discharge and be delivered to vacuum filter(15)It is interior, then by lift truck(16)Will filtering Thing transports;Through vacuum filter(15)Slurries after filtering flow into sedimentation basin(17)It is interior, by reflux pump after precipitation(18)It is delivered to Pulping tank(6)And circulating tank(8)In.
A kind of 2. flyash desulfurizer according to claim 1, it is characterised in that:Described desulfurizing tower(10)Using general The mode of logical carbon steel and glass inner-lining scale paint, outside acid washing phosphorization and the finish paint of two bottom two is made, and its pipeline is according to 0.002- 0.003 gradient laying, and external heating and insulation construction.
A kind of 3. flyash desulfurizer according to claim 1, it is characterised in that:Described pump for mortar transmission(7), circulating pump (9)And Pulp pump(14)Wear resistant corrosion resistant pump is used, when it selects pony pump, its shaft seal uses K-type dynamic seal, When it selects mammoth pump, its shaft seal is sealed using Z-type self-balancing or Double End integrated mechanical sealing.
A kind of 4. flyash desulfurizer according to claim 1, it is characterised in that:Into desulfurizing tower(10)Fume pipe Road sets two, and one is provided with regulating valve, and another flue when being run as small-power is not provided with regulating valve;It is described Slurries conveying and recycle unit, two sets of loop slurry spray piping relative set.
5. according to a kind of any described flyash desulfurizers of claim 1-4, it is characterised in that:The pulping tank(6)'s Tank body is made using the stainless steel of wear resistant corrosion resistant, and portion is provided with pH monitors and tank gage in the inner.
6. according to a kind of any described flyash desulfurizers of claim 1-4, it is characterised in that:Described nozzle is using resistance to Grind corrosion resistant carborundum to be made, each staggered arrangement of layer nozzle top-bottom cross.
7. according to a kind of any described flyash desulfurizers of claim 1-4, it is characterised in that:Above and below described demister Both ends are respectively provided with backwashing water pipeline, and backwashing water pipeline is through backwashing pump(21)With water tank(20)It is connected, water tank(20)Access Tap water pipe network(19).
8. according to a kind of any described flyash desulfurizers of claim 1-4, it is characterised in that:Described fresh-air duct road tail Portion carries out preservative treatment, and sets water fender and dewatering outlet in its minimum point.
9. according to a kind of any described flyash desulfurizers of claim 1-4, it is characterised in that:Also include lime tank(5), Described lime tank(5)Through pipeline and valve and pulping tank(6)It is connected.
CN201720710495.6U 2017-06-19 2017-06-19 Flyash desulfurizer Active CN206996258U (en)

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CN201720710495.6U CN206996258U (en) 2017-06-19 2017-06-19 Flyash desulfurizer

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Application Number Priority Date Filing Date Title
CN201720710495.6U CN206996258U (en) 2017-06-19 2017-06-19 Flyash desulfurizer

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GR01 Patent grant
GR01 Patent grant
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of utility model: Fly ash desulfurization unit

Effective date of registration: 20210624

Granted publication date: 20180213

Pledgee: Bank of China Limited Qian'an Branch

Pledgor: TANGSHAN JINSHA COMBUSTION HEAT ENERGY Co.,Ltd.

Registration number: Y2021990000552

PE01 Entry into force of the registration of the contract for pledge of patent right
PC01 Cancellation of the registration of the contract for pledge of patent right

Date of cancellation: 20221111

Granted publication date: 20180213

Pledgee: Bank of China Limited Qian'an Branch

Pledgor: TANGSHAN JINSHA COMBUSTION HEAT ENERGY CO.,LTD.

Registration number: Y2021990000552

PC01 Cancellation of the registration of the contract for pledge of patent right