CN107519715A - A kind of thermal power plant treating flour dust system and method - Google Patents
A kind of thermal power plant treating flour dust system and method Download PDFInfo
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- CN107519715A CN107519715A CN201710978212.0A CN201710978212A CN107519715A CN 107519715 A CN107519715 A CN 107519715A CN 201710978212 A CN201710978212 A CN 201710978212A CN 107519715 A CN107519715 A CN 107519715A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/08—Means for controlling the separation process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/14—Fan arrangements for providing induced draft
Abstract
The invention discloses a kind of thermal power plant treating flour dust system and method, including pedestal, water system, air supply system, two phase flow shower nozzle and air-suction duct, formed with settling chamber in the pedestal, the two phase flow nozzle layout of sprinkler is at the top of the settling chamber, the water system and air supply system connect with the two phase flow shower nozzle respectively, the air-suction duct docks with the inlet end of the settling chamber, and the air-suction duct is provided with blower fan.The present invention reaches micron order by the water smoke for adjusting supply, pressure of supply water makes to gush out, change mist amount size by adjusting nozzle usage quantity, change the wetability of water by adding surfactant, the micron order water smoke of ejection will collide with dust, coat etc. and settling after effect, finally realize the effect of spray for dust suppression.Cost of the present invention is low, power consumption is few, and air purification effect is notable, is especially suitable for the purification of respirable dust surrounding air.
Description
Technical field
The present invention relates to thermal power plant dust atmosphere to administer field, and in particular to a kind of thermal power plant treating flour dust system
System and method.
Background technology
In recent years, developing rapidly with Chinese society economy, problem of environmental pollution become more serious, not only haze sky
The frequency more and more higher that gas occurs, it is also more amid a sharp increase than in the past in the order of severity, and the dust that thermal power industry is discharged
Occupy sizable proportion.
In power industry the most wide a kind of occupational hazardous particulate matter silica dust of harmfulness highest and harm face generally refer to
Quartz is the dust of the free silicon dioxide of representative.The silica dust of thermal power plant is usually the powder containing less than 10% free silicon dioxide
Dirt (national regulation highest permissible discharge mass concentration is 10mg/m3), diameter account for 73% less than 5 μm.The inspection around boiler
Worker because needing cat ladder to ascend a height, it is sometimes desirable to beat burnt clear powder, labor intensity is larger, the dust total amount just corresponding increase of contact, inspection
Repair operation needs to be engaged in heavier manual labor into confined space sometimes, and dust exposure concentration is higher, and free silicon dioxide is dense
Degree is big, and grit decentralization is high, and the influence to workers ' health is also maximum.In addition, in thermal power plant, defeated coal, unload coal, powder system processed
System contain fire coal unload, transport, sieving, crushing, conveying, the complicated link such as powder processed, these places easily produce a large amount of dust.
Dust pollution has not only broken up working environment, has influenceed workers ' health, can also bring potential safety hazard, influences full factory's security civilization life
Production.With the appearance of national environmental protection new standard, the problem of new is brought to Coal Conveying System of Power Plant treating flour dust.Dust pollution pair
People's is physically and mentally healthy very harmful, and treating flour dust is significant.Existing cleaner mainly has following several：
The mixture of ash and air, sack cleaner, is mainly extracted into sack cleaner, passes through cloth bag by the first
Filtration, ash is separated with air, air through negative-pressure air fan outlet inside cloth bag by being discharged into air, and ash is due to the work of gravity
With falling into Hui Ku through blocking valve.Have the following disadvantages：(1) cloth bag water imbibition is big, easy fouling, not antistatic, not fire-retardant, long
Phase work aeration is poor, influences dust removing effects；(2) deduster produces secondary pollution in deashing process；(3) deduster deashing is not
Rationally and energy loss can not caused in section's class hour；(4) the easy aging of equipment, maintenance cost is high, and maintenance load is big, service life
It is short, and floor space is larger；(5) when pollution sources disperse, dust is difficult to collect, and works as some characteristic dust (such as：Coal dust
Dirt) when reaching finite concentration, it will be exploded in high temperature, naked light, electric spark, friction, situation about hitting；(6) filtrate is selected
When must take into consideration the characteristic of dusty gas, typically require that its filtrate has the features such as wear-resisting, corrosion resistant, resistance are low, service life is long, from
And add the manufacturing expense of filter bag；(7) property of filtrate determines that sack cleaner has limitation relative to dust；(8)
Regulation effect is poor, although discharge value reaches 50 milligrams/cubic metre of country's permission, the improvement index at pollution scene does not reach
10 milligrams/cubic metre of national regulation.
Second, electric cleaner, when mainly dusty gas passes through high-voltage electrostatic field, make grit charged, in electric field force
Under effect, charged grit is deposited on circuit board, after dust deposit is to certain thickness, is shaken by rapping and fall on ash
Ash is drained in bucket and by ash-valve, so as to reach the purpose of dedusting.Have the following disadvantages：(1) once investment is high, and steel disappear
Consumption is big；(2) electric cleaner usually requires that higher manufacture installation accuracy, otherwise it cannot be guaranteed that it normally and efficiently runs；(3) it is electric
Deduster is relatively low and floor space is larger due to field gas velocity；(4) electric cleaner there are certain requirements to handled dust, suitable
Dust beyond suitable scope, will have corresponding measure using electric precipitation, and just can guarantee that necessary dust removal performance.
The third, power-free dust-removing is maximum using pressure balance and closed loop circulation style with aerodynamic principle
The pressure of the reduction blanking bucket class dust air of limit, is allowed to tend to balance with external air pressure.Material can produce when falling
Raw substantial amounts of negative-pressure air-flow, dust is under the guiding of negative-pressure air-flow, the shuttling movement in confined space, hits pressure plare, straight line
Motion is changed into curvilinear motion, reduces the potential energy of itself, dirt lowers under gravity, to reach the purpose of dedusting.In the presence of
Following shortcoming：(1) investment is big；(2) dust catching rate is low；(3) horizontal pipe easily blocks, and influences capture rate；(4) purification efficiency compared with
Low (being usually 40% to 50%)；(5) floor space is big.
4th kind, single-fluid high pressure dry fog dedusting, by higfh-tension ceramics plunger pump, water is pressurizeed through piping, by height
Nozzle atomization is pressed, dirt pits has been connected to by pipeline, to reach the purpose of dedusting.Have the following disadvantages：(1) nozzle is easy
Block；(2) equipment failure rate is high, and maintenance cost is high；(3) for the dust of sports equipment, playing the regulation effect of dirt pits can only reach
To 30% to 40%；(4) due to spray nozzle clogging, pipe joint easily pops；(5) safety coefficient is low, because equipment is
Water is pressurized to 6MP-8MP with high-pressure pump, once pipe explosion or washing open, field personnel can be damaged and scene is set
It is standby to cause unnecessary loss；(6) requirement to the degree of purity at water source is high；(7) filter easily blocks.
Standard level, powder are not reached still because various cleaners have deficiency, the dust index in thermal power plant above
Dirt is administered extremely urgent.
The content of the invention
The present invention purpose be propose one kind can comprehensive integrated treatment thermal power plant air pollution problems inherent, from
And reach the thermal power plant treating flour dust system and method that power plant integrated environment improves.
In order to solve the above technical problems, treating flour dust system in thermal power plant provided by the present invention, including pedestal, water supply
System, air supply system, two phase flow shower nozzle and air-suction duct, the pedestal are interior formed with settling chamber, the two phase flow nozzle layout of sprinkler
At the top of the settling chamber, the water system and air supply system connect with the two phase flow shower nozzle respectively, the aspiration channel
Road docks with the inlet end of the settling chamber, and the air-suction duct is provided with blower fan.
Further, the water system includes water tank, measuring pump and water diverter, and the water tank is dry by supplying water
Road connects with the measuring pump and water diverter successively, the water supply main line be provided with water ga(u)ge, water filter, water pressure gauge and
Water pressure maintaining valve, the water diverter separate a plurality of water supply branch road, and the water supply branch road is provided with water shunting valve.
Further, the water tank is provided with activating agent adding mouth, surfactant adding set and the activating agent
Adding mouth is docked, filled with the SAS anion tables that mass concentration is 0.04%-0.06% in the surfactant adding set
Face activating agent.
Further, the air supply system includes air accumulator, air compressor machine and gas current divider, the gas outlet of the air compressor machine with
The air accumulator is connected, and the air accumulator is connected by supplying main line with the gas current divider, and the supply main line is provided with
Air gauge, air-flow gauge and gas pressure maintaining valve, the gas current divider separate a plurality of supply branch road, and the supply branch road is provided with qi leel
Flow valve.
Further, the two phase flow shower nozzle is arranged on the top of the settling chamber, the top surface of the support by support
For network structure, the two phase flow shower nozzle is evenly distributed at the cross-point of network structure and injection direction is towards the deposition
Room, the supply branch road connect with the air inlet of two phase flow shower nozzle, and the water supply branch road connects with the air inlet of two phase flow shower nozzle.
Further, the two phase flow shower nozzle is provided with controlling switch.
Further, the side wall of the settling chamber is provided with the observation window being made of clear material.
Further, the air pressure adjustment scope of the air compressor machine is 0.2-0.4Mpa, and the hydraulic pressure of the measuring pump adjusts model
Enclose for 0.1-0.3Mpa.
Further, the height of the support and the mesh size of network structure can adjust.
A kind of thermal power plant method for treating flour dust, using above-mentioned thermal power plant treating flour dust system, including following step
Suddenly：
Step 1, by dust occur point dusty gas be delivered to by blower fan in settling chamber；
Step 2, regulation two phase flow shower nozzle quantity, and water system and air supply system are adjusted, it is allowed to meet that current dust-laden is empty
The purification demand of gas, micron order water smoke and the dusty gas of ejection collide, reunited and settle, it is purified after gas by sinking
The outlet side discharge of product room；
Step 3, the residue fallen to haze in settling chamber are cleared up in time, prevent the generation of reentrainment of dust.
Compared with prior art, beneficial effects of the present invention are：
(1) dust granules around dust point or in slype are sucked into by gas-liquid two-phase by the air suction function of blower fan
Flow below device, be convenient for focusing on；It is empty using the thermal power plant treating flour dust system nozzle lower zone of the present invention
Air humidity degree can rapid saturation, have extremely strong seizure effect to dust granules, dust concentration can be by 8000ug/m3It is down to
56ug/m3, deposition effect is good.
(2) by being equipped with surfactant adding set at the top of water tank, surfactant is lived for SAS anionic surfaces
Property agent, this activating agent good water solubility, there is good wetting, emulsification, scattered, foam and dirt-removing power, and biology drop in hard water
Solution property is good, harmless.
(3) by setting optimal gas-liquid pressure, it is possible to achieve droplet it is micronized, good dust removing effects can be reached；
(4) by changing biphase gas and liquid flow nozzle quantity to be applicable the dust atmosphere of various concentrations；
(5) by adjusting the switch on air water flow divider, the layout type of spraying can be changed；
(6) the system water consumption, air consumption are extremely low, and 1/3rd or so of only common biphase gas and liquid flow device；
(7) haze efficiency high is removed, the improvement to respirable dust can reach more than 95%；
(8) system assembles are convenient and applied widely, can fast construction, can be applied to aggravate the industry that haze is formed
The place such as area or construction site.
In summary, the present invention reaches micron order by the water smoke for adjusting supply, pressure of supply water makes to gush out, and passes through regulation
Nozzle usage quantity changes mist amount size, changes the wetability of water, the micron order water smoke of ejection by adding surfactant
It will collide, coat with dust etc. and settling after effect, and finally realizing the effect of spray for dust suppression, and having that cost will be low, power consumption is few, and
The advantages of air purification effect is notable, it is especially suitable for the purification of respirable dust surrounding air.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is medium-height trestle structural representation of the present invention；
Fig. 3 is the top view of medium-height trestle of the present invention；
Fig. 4 is the side view of medium-height trestle of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Referring to Fig. 1-Fig. 4, a kind of thermal power plant treating flour dust system, including pedestal 1, water system, air supply system, two
Mutually stream shower nozzle 2 and air-suction duct 3, pedestal 1 is interior to be arranged in the top of settling chamber 4 formed with closed settling chamber 4, two phase flow shower nozzle 2
Portion, water system and air supply system connect with the water inlet and air inlet of two phase flow shower nozzle 2 respectively, and two in settling chamber 4 are relative
Side wall on be respectively equipped with air inlet port and gas outlet port, air-suction duct 3 docks with the air inlet port of settling chamber, in aspiration channel
Road 3 is provided with blower fan, and blower fan sucks dusty gas in settling chamber, and the present invention is changed by adjusting gas-water pressure with spray amount
Become nozzle atomization performance, spray fine water-spray of the particle diameter less than 10 μm and collide, reunite with dusty gas, then settle, pass through
Purified gas is discharged by gas outlet, and the material of deposition can be from the deposit discharge groove discharge on pedestal.Two in the present invention
The biphase gas and liquid flow shower nozzle that mutually stream sprayer unit produces using Foshan Ke companies, to provide fine water-spray.
Specifically, two phase flow shower nozzle 2 is arranged on the top of settling chamber 4 by support 5, the top surface of support 5 is network structure,
The height of support 5 and the mesh size of network structure can be adjusted freely, to adapt to different purification requirements.Two phase flow shower nozzle 2
It is evenly distributed at the cross-point of network structure and injection direction is towards settling chamber 4.Water system includes water tank 6, measuring pump 7
And water diverter 8, water tank 6 are connected with measuring pump 7 and water diverter 8 successively by water supply main line 9, water supply main line 9 is provided with
Water ga(u)ge, water filter, water pressure gauge and water pressure maintaining valve, water diverter 8, which separates, a plurality of to be connected with the water inlet of two phase flow shower nozzle 2
Water supply branch road 10, water shunting valve is provided with each water supply branch road 10.Air supply system includes air accumulator 11, air compressor machine 12 and qi leel stream
Device 13, the gas outlet of air compressor machine 12 are connected with air accumulator 11, and air accumulator 11 is connected by supplying main line 14 with gas current divider 13,
Supply main line 14 is provided with air gauge, air-flow gauge and gas pressure maintaining valve, and gas current divider 13 separates a plurality of and air inlet of two phase flow shower nozzle 2
The supply branch road 15 of mouth connection, gas flow divider is provided with supply branch road 15, wherein, the air pressure adjustment scope of air compressor machine 12 is
0.2-0.4Mpa, the hydraulic pressure adjustable range of measuring pump 7 is 0.1-0.3Mpa.
To improve the wettability of water, water tank 6 is provided with activating agent adding mouth, surfactant adding set and activity
Agent adding mouth is docked, and it 0.05% is SAS anion surface actives to be filled with mass concentration in surfactant adding set
Agent, this activating agent good water solubility, there are good wetting, emulsification, scattered, foam and dirt-removing power in hard water, and it is biodegradable
Property is good, harmless.
In the present invention, controlling switch is provided with two phase flow shower nozzle 2, spray can be adjusted open according to the haze amount in environment
The number of mouth number.
For convenience of observation deposition effect, the observation window being made of clear material is provided with the side wall of settling chamber.
A kind of thermal power plant method for treating flour dust, comprises the following steps：
Step 1, thermal power plant treating flour dust system is installed in certain aerated area, sent out external dust by blower fan
Dust laden air in raw point or slype is sucked into interior positioned at the lower section of two phase flow shower nozzle 2 to settling chamber 4；
Step 2, the quantity of regulation two phase flow shower nozzle 2, regulation gas-water pressure parameter make air pressure be 0.3Mpa, hydraulic pressure 0.2Mpa,
The water of certain pressure is gentle to enter two phase flow shower nozzle 2 from both sides respectively, and relative velocity is very big between gas-liquid two-phase, in narrow and small effect
Collided and be atomized in cavity, produced particle diameter less than 10 μm and adjustable high speed water mist particle, ejection contain surface
The fine water-spray of activating agent collides with dusty gas, reunited and settles, it is purified after gas by settling chamber outlet side
Discharge；
Step 3, the residue fallen to haze in settling chamber are cleared up in time, prevent the generation of reentrainment of dust.
Using the present invention thermal power plant treating flour dust system nozzle lower zone air humidity can rapid saturation, it is right
Dust granules have extremely strong seizure effect, and dust concentration can be by 8000ug/m3It is down to 56ug/m3, deposition effect is good.
Claims (10)
- A kind of 1. thermal power plant treating flour dust system, it is characterised in that：Including pedestal, water system, air supply system, two phase flow Shower nozzle and air-suction duct, the pedestal is interior formed with settling chamber, and the two phase flow nozzle layout of sprinkler is in the top of the settling chamber, institute State water system and air supply system to connect with the two phase flow shower nozzle respectively, the air-suction duct and the inlet end of the settling chamber Docking, the air-suction duct are provided with blower fan.
- 2. treating flour dust system in thermal power plant according to claim 1, it is characterised in that：The water system includes storage Water pot, measuring pump and water diverter, the water tank are connected with the measuring pump and water diverter successively by water supply main line, institute State water supply main line and be provided with water ga(u)ge, water filter, water pressure gauge and water pressure maintaining valve, the water diverter separates a plurality of branch that supplies water Road, the water supply branch road are provided with water shunting valve.
- 3. treating flour dust system in thermal power plant according to claim 2, it is characterised in that：The water tank, which is provided with, lives Property agent adding mouth, surfactant adding set docks with the activating agent adding mouth, in the surfactant adding set Filled with the SAS anion surfactants that mass concentration is 0.04%-0.06%.
- 4. the thermal power plant treating flour dust system according to Claims 2 or 3, it is characterised in that：The air supply system bag Air accumulator, air compressor machine and gas current divider are included, the gas outlet of the air compressor machine is connected with the air accumulator, and the air accumulator passes through Supply main line connects with the gas current divider, and the supply main line is provided with air gauge, air-flow gauge and gas pressure maintaining valve, the gas Current divider separates a plurality of supply branch road, and the supply branch road is provided with gas flow divider.
- 5. treating flour dust system in thermal power plant according to claim 4, it is characterised in that：The two phase flow shower nozzle passes through Support is arranged on the top of the settling chamber, and the top surface of the support is network structure, and the two phase flow shower nozzle is evenly distributed on At the cross-point of network structure and injection direction connects towards the settling chamber, the air inlet of the supply branch road and two phase flow shower nozzle Logical, the water supply branch road connects with the air inlet of two phase flow shower nozzle.
- 6. treating flour dust system in thermal power plant according to claim 5, it is characterised in that：Set on the two phase flow shower nozzle There is controlling switch.
- 7. treating flour dust system in thermal power plant according to claim 5, it is characterised in that：In the side wall of the settling chamber Provided with the observation window being made of clear material.
- 8. treating flour dust system in thermal power plant according to claim 5, it is characterised in that：The air pressure of the air compressor machine is adjusted Adjusting range is 0.2-0.4Mpa, and the hydraulic pressure adjustable range of the measuring pump is 0.1-0.3Mpa.
- 9. treating flour dust system in thermal power plant according to claim 5, it is characterised in that：The height and net of the support The mesh size of shape structure can adjust.
- A kind of 10. thermal power plant method for treating flour dust, it is characterised in that：Usage right requires the thermal power plant described in 1-9 Treating flour dust system, comprises the following steps：Step 1, by dust occur point dusty gas be delivered to by blower fan in settling chamber；Step 2, regulation two phase flow shower nozzle quantity, and water system and air supply system are adjusted, it is allowed to meet current dust laden air Purification demand, micron order water smoke and the dusty gas of ejection collide, reunited and settle, it is purified after gas by settling chamber Outlet side discharge；Step 3, the residue fallen to haze in settling chamber are cleared up in time, prevent the generation of reentrainment of dust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710978212.0A CN107519715A (en) | 2017-10-18 | 2017-10-18 | A kind of thermal power plant treating flour dust system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710978212.0A CN107519715A (en) | 2017-10-18 | 2017-10-18 | A kind of thermal power plant treating flour dust system and method |
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| Publication Number | Publication Date |
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| CN107519715A true CN107519715A (en) | 2017-12-29 |
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ID=60685417
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| CN201710978212.0A Withdrawn CN107519715A (en) | 2017-10-18 | 2017-10-18 | A kind of thermal power plant treating flour dust system and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108686446A (en) * | 2018-04-23 | 2018-10-23 | 湘潭大学 | A kind of city haze administering method based on traffic light intersection vehicle maintenance service |
| CN110343508A (en) * | 2019-06-18 | 2019-10-18 | 武汉钢铁有限公司 | A kind of suppressing dust with dry mist agent and dust-suppression method and system |
| CN110652813A (en) * | 2019-10-08 | 2020-01-07 | 合肥合安智为科技有限公司 | Micron-sized dry fog dust suppression system |
| CN112933845A (en) * | 2021-02-17 | 2021-06-11 | 张宏涛 | Waste gas treatment equipment |
| CN112933846A (en) * | 2021-02-17 | 2021-06-11 | 张宏涛 | Waste gas treatment method |
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| US5466270A (en) * | 1992-11-16 | 1995-11-14 | Abdelmalek; Fawzy T. | Cyclonic centrifugal gas separator - absorber apparatus for boiler flue gas cleaning |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108686446A (en) * | 2018-04-23 | 2018-10-23 | 湘潭大学 | A kind of city haze administering method based on traffic light intersection vehicle maintenance service |
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| CN110652813A (en) * | 2019-10-08 | 2020-01-07 | 合肥合安智为科技有限公司 | Micron-sized dry fog dust suppression system |
| CN112933845A (en) * | 2021-02-17 | 2021-06-11 | 张宏涛 | Waste gas treatment equipment |
| CN112933846A (en) * | 2021-02-17 | 2021-06-11 | 张宏涛 | Waste gas treatment method |
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Application publication date: 20171229 |