CN208365576U - A kind of boiler smoke wind blending heating regulating system - Google Patents
A kind of boiler smoke wind blending heating regulating system Download PDFInfo
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- CN208365576U CN208365576U CN201820467230.2U CN201820467230U CN208365576U CN 208365576 U CN208365576 U CN 208365576U CN 201820467230 U CN201820467230 U CN 201820467230U CN 208365576 U CN208365576 U CN 208365576U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model relates to a kind of boiler smoke wind to blend heating regulating system, the entrance side or outlet side of its deduster are equipped with the heat exchanger being located in flue, the air inlet of heat exchanger is equipped with blower, the gas outlet of heat exchanger exports the hot-air intake in side flue with desulfurizing tower by pipeline I and is connected to, and air door I is equipped on pipeline I；The gas outlet of heat exchanger also passes through pipeline II and is connected to the air inlet of pressure fan, and air door II is housed on pipeline II.The utility model is by reducing deduster or desulfurizing tower inlet flue gas temperature; be conducive to protect deduster; and the loss of desulfurization water and the discharge amount of waste water are reduced, hot-air is sent into primary air fan, can increase substantially drying capacity of pulverizer; hot-air blending enters chimney; it can effectively eliminate white plume visual pollution, by installation temperature point and controller, realize the closed-loop control of temperature; it can effectively achieve the desired results, the optimum balance state that the economy of device and the feature of environmental protection are adjusted.
Description
Technical field
The utility model relates to the fume treatment technical fields of coal-burning boiler, and in particular to a kind of boiler smoke wind blending heating
Regulating system and its control method.
Background technique
Blocky raw coal is ground by coal pulverizer and is made by the coal dust that coal-powder boiler uses, in order to improve combustion efficiency and grinding
Efficiency, need to first pass through in cold wind be mounted on boiler internal air preheater heated after become hot wind, hot wind is blown into mill
The drying and grinding power output that coal machine improves plays the role of assistant research fellow, and hot wind carries coal dust and enters hearth combustion, and high-temperature hot-air has combustion-supporting
Effect, need by pulverizer outlet temperature control in certain temperature range, reach the balance of safety and economy, in reality
In the production of border, the interior moisture or free surface moisture contained due to raw coal is excessive, and hot blast temperature is inadequate frequent occurrence, influences grinding power output
And the case where combustion-supporting effect.When coal dust burns in boiler, a large amount of dust fly ash granule and sulfide will form, coal-burning power plant is
It realizes minimum discharge, deduster is generallyd use for dust particles and is filtered out, for the sulfide in flue gas, generallys use stone
Lime stone wet desulfurization methods carry out desulfurization.The smoke temperature of air preheater outlet is usually 120 DEG C -150 DEG C, which passes through deduster
Enter desulfurizing tower afterwards, usual 45 DEG C -50 DEG C of flue-gas temperature be discharged from desulfurizing tower, this can evaporate and carry away a large amount of desulfurizing tower sprays
Water drenching causes the waste of water resource and the excessive emissions of desulfurization wastewater.Meanwhile the flue gas of the high humility of desulfurizing tower discharge is sent into
Smoke stack emission, because smoke moisture usually emits " gypsum plumage " phenomenon of white cigarette in chimney breast generation greatly, causes " negative into atmosphere
The visual pollution in face ", and will form a large amount of aerosol " droplet " in chimney outlet and drop near zone, give people into one
Step causes the intuition of sense organ to pollute and increase the factor that haze is formed.The prior art solves chimney and emits one of means of white cigarette, is
Hot water circuit heat exchanger is installed additional in chimney entrance, since low temperature and high humidity furnace cigarette contains sulfur oxide, easily forms acid dew, pole under low temperature
Have corrosivity, generallys use fluoroplastics as heat-transfer surface, investment low as heat-transfer surface heating surface heat exchange efficiency using fluoroplastics
Greatly, occupied space is big, and it is big that flue increases resistance newly.Bag filter is minimum discharge cleaner always, flue-gas temperature it is excessively high or
It is too low, the dust removing effects and safety in utilization of cloth bag can be all influenced, need flue-gas temperature maintaining a certain range, to guarantee cloth
Bag dust collector using safe and dust removing effects, it is in production practice, excessively high there are air preheater outlet temperature and be difficult to adjust
The problem of section and control.The variation of the operating conditions such as free surface moisture is constantly in larger range in boiler load, external condition and fire coal
Fluctuation status, the smoke temperature into air preheater outlet can generate acute variation therewith, this brings temperature regulation and control
Trouble, this just needs to study the regulation and control system of the adjustment control method of a set of boiler smoke air temperature and application this method, real
The synchronous adjustment of existing bag filter entrance and chimney entrance flue gas temperature, and can be under different operating conditions, dynamic adjusts smoke temperature,
The wind and smoke temperature of different location is controlled in respective target zone.
Summary of the invention
The utility model in order to make up for the deficiencies of the prior art, provide a kind of boiler smoke wind blending heating regulating system and
Its control method.
The utility model is achieved by the following technical solution:
A kind of boiler smoke wind blending heating regulating system, the smoke outlet of combustion chamber connect flue, at flue smoke inlet according to
Secondary to be equipped with deduster, desulfurizing tower, flue end is connected with chimney；The air inlet of its coal pulverizer connects primary air fan by pipeline III
(or pressure fan), and have the air preheater on flue on pipeline III, the outlet of coal pulverizer to combustion chamber；Especially it
It being in and is equipped with the heat exchanger being located in flue in: the entrance side or outlet side of deduster, the air inlet of heat exchanger is equipped with blower,
The gas outlet of heat exchanger exports the hot-air intake in side flue with desulfurizing tower by pipeline I and is connected to, and is equipped on pipeline I
Air door I；The gas outlet of heat exchanger also passes through pipeline II and is connected to the air inlet of pressure fan, and air door II is housed on pipeline II.
Preferably, above-mentioned blower is frequency conversion fan, and air door I, air door II adjust aperture by actuator.
Technical solutions of the utility model further include having controller and following measuring point:
Air themperature measuring point, the atmospheric pressure measuring point of outside；
Temperature point I positioned at flue end；
Temperature point II in heat exchanger exit flue；
Temperature point III on heat exchanger exit pipeline I；
Temperature point IV on coal pulverizer outlet conduit；
The measuring unit of above each temperature point and atmospheric pressure measuring point is connected to controller, controller also with the tune of blower
Fast device, the actuator I of air door I, air door II actuator II control line connection, to control the wind-force size and air door I and wind of blower
The aperture of door II.
In above-mentioned technical proposal, what the heat that heat exchanger draws hot fume in flue blowed from frequency conversion fan
Air, the hot-air after heating are divided into two-way, are blowed to the air draught entrance of primary air fan (pressure fan) all the way, by First air
After machine pressurization, it is sent into air preheater heating, becomes hot wind after heating and enters coal pulverizer, be used for assistant research fellow, and after mixing with coal dust
It is blown into burner hearth, participates in burning；Another way hot-air is directly entered in the flue of desulfurizing tower outlet, the clammy combustion with desulfurizing tower outlet
Enter chimney after flue gas mixing and be discharged into atmosphere, this can increase substantially the temperature and the velocity of discharge into chimney smoke, and substantially
Degree dilution moisture, reduces the humidity of mixing cigarette air, is conducive to the saturation degree and diffusion velocity that improve chimney discharge flue gas, in cigarette
Gas, which not yet condenses, to be formed before aerosol, is spread, and then is eliminated its white cigarette visual pollution and reduced haze and formed.
The control method of above-mentioned boiler smoke wind blending heating regulating system is as follows:
Controller adjusts the revolving speed of frequency conversion fan according to the temperature feedback value of temperature point II and temperature point III, works as temperature
Measured value at measuring point II is higher than the measured value at target control value range or temperature point III at this lower than the target at this
When control range value, control frequency conversion fan improves revolving speed, and the measured value at temperature point II is lower than the target control model at this
When enclosing the target control value range that measured value at value or temperature point III is higher than at this, control frequency conversion fan reduces revolving speed, from
And it is adjusted into the air capacity of heat exchanger, by heat exchanger exit smoke temperature and hot air temperature control in default range；
Controller adjusts the aperture of air door II according to the temperature feedback value of temperature point IV by adjusting actuator II, when
When measured value at temperature point IV is lower than the target control value range at this, controller controls actuator II to improve air door II
Aperture, when measured value at temperature point IV is higher than the target control value range at this, controller controls actuator II
Reduce the aperture of air door II, thus by the outlet temperature control of coal pulverizer in default range；
Controller adjusts the aperture of air door I according to the temperature feedback value of temperature point I by adjusting actuator I, works as temperature
When spending the target control value range that the measured value at measuring point I is lower than at this, controller controls actuator I to improve opening for air door I
Degree, when the measured value at temperature point I is higher than the target control value range at this, controller controls actuator I to reduce wind
The aperture of door I, thus by the flue-gas temperature control of mixed zone in default range.
The beneficial effects of the utility model are: installing heat exchanger additional in deduster entrance or outlet, after heating air, respectively
It is sent into primary air fan (pressure fan) entrance and chimney entrance, temperature control is carried out by the temperature sensor and controller of installation,
By reducing deduster or desulfurizing tower inlet flue gas temperature, be conducive to protect deduster, and reduce loss and the waste water of desulfurization water
Discharge amount, hot-air are sent into primary air fan, can increase substantially drying capacity of pulverizer, and hot-air blending enters chimney, can
To effectively eliminate white plume visual pollution, by installation temperature point and controller, the closed-loop control of temperature, Ke Yiyou are realized
Effect achieves the desired results, the optimum balance state that the economy of device and the feature of environmental protection are adjusted.
Detailed description of the invention
The utility model will be further described below with reference to the accompanying drawings.
Fig. 1 is the structural schematic diagram of embodiment 1；
Fig. 2 is the structural schematic diagram of embodiment 2；
In figure, 1 flue, 2 chimneys, 3 dedusters, 4 desulfurizing towers, 5 heat exchangers, 6 hot-air intakes, 7 pipelines I, 8 air doors I,
9 actuators I, 11 pipelines II, 12 air doors II, 13 actuators II, 14 primary air fans (pressure fan), 15 pipelines III, 16 air preheats
Device, 17 coal pulverizers, 18 blowers, 19 controllers, 20 air themperature measuring points, 21 atmospheric pressure measuring points, 22 temperature points I, 23 temperature are surveyed
Point II, 24 temperature points III, 25 temperature points IV.
Specific embodiment
The utility model is described in detail combined with specific embodiments below.
Embodiment 1
Boiler smoke wind blending heating regulating system in the embodiment is as shown in Fig. 1, combustion chamber (not shown)
Smoke outlet connect flue 1, be successively arranged deduster 3, desulfurizing tower 4 at flue smoke inlet, flue end is connected with chimney 2；Its
The air inlet of coal pulverizer 17 connects primary air fan (pressure fan) 14 by pipeline III 15, and has the sky on flue on pipeline III
Air preheater 16, the outlet of coal pulverizer to combustion chamber；The outlet side of deduster is equipped with the heat exchanger 5 being located in flue, changes
The air inlet of hot device is equipped with blower 18, and the gas outlet of heat exchanger exports the hot-air in side flue by pipeline I 7 and desulfurizing tower
Intake 6 is connected to, and air door I 8 is equipped on pipeline I；The gas outlet of heat exchanger also passes through the air inlet of pipeline II 11 Yu pressure fan
Mouth connection, and air door II 12 is housed on pipeline II.
The embodiment further includes having following measuring point:
Air themperature measuring point 20, the atmospheric pressure measuring point 21 of outside；
Temperature point I 22 at flue end (chimney smoke inlet)；
Temperature point II 23 in heat exchanger exit flue；
Temperature point III 24 on heat exchanger exit hot-air channel (i.e. pipeline I)；
Temperature point IV 25 on coal pulverizer outlet conduit.
The measuring unit (sensor) of above each temperature point and atmospheric pressure measuring point is connected to controller 19, and controller is also
It controls line with the actuator II 13 of the governor of blower 18, the actuator I 9 of air door I, air door II to connect, to control the wind-force of blower
The aperture of size and air door I and air door II.
In the embodiment, it is mounted on the heat that the heat exchanger 5 in house outlet flue draws hot fume in flue
The air blowed from frequency conversion fan 18, the hot-air after heating are divided into two-way, are blowed all the way to primary air fan (air-supply
Machine) 14 air draught entrance in, after primary air fan pressurizes, be sent into air preheater 16 heat, after heating become hot wind enter
Coal pulverizer is used for assistant research fellow, and is blown into burner hearth after mixing with coal dust, participates in burning；Another way hot-air is directly entered desulfurizing tower and goes out
In the flue of mouth, enters chimney after mixing with the clammy burning fume of desulfurizing tower outlet and be discharged into atmosphere, this can increase substantially entrance
The temperature and the velocity of discharge of chimney smoke, and moisture is significantly diluted, the relative humidity of mixing cigarette air is reduced, is conducive to improve
The saturation degree and diffusion velocity of chimney discharge flue gas are spread before flue gas not yet condenses and forms aerosol, and then are eliminated
Its white cigarette visual pollution and reduction haze are formed.
Control method is as follows in the embodiment:
Temperature feedback value of the controller 19 according to temperature point II 23 and temperature point III 24, adjust automatically frequency conversion fan 18
Revolving speed, be adjusted into the air capacity of heat exchanger, realize under the operating condition that preheater exports that smoke temperature and air themperature frequently change,
Heat exchanger exit smoke temperature and hot air temperature are controlled always in default range；
Controller is according to the temperature feedback value of temperature point IV 25 by adjusting II 13 adjust automatically air door II 12 of actuator
Aperture, the outlet temperature of coal pulverizer is controlled automatically in default range；
Controller opening by adjusting I 9 adjust automatically air door I 8 of actuator according to the temperature feedback value of temperature point I 22
Degree, the flue-gas temperature of mixed zone is controlled automatically in default range.
Embodiment 2
It is that heat exchanger 5 is mounted in the flue of deduster entrance side in place of the difference of the embodiment and embodiment 1.Such as
Shown in attached drawing 2, which be can reduce by the way that heat exchanger to be mounted in the flue of deduster entrance side into deduster
Flue-gas temperature, damage the dust-removal cloth-bag of deduster to avoid because flue-gas temperature is excessively high.
The utility model is illustrated by way of example above, but the utility model is not limited to above-mentioned specific implementation
Example, all ranges that the requires of the utility model protection is belonged to based on any changes or modifications that the utility model is done.
Claims (3)
1. a kind of boiler smoke wind blending heating regulating system, the smoke outlet of combustion chamber connect flue (1), at flue smoke inlet according to
Secondary to be equipped with deduster (3), desulfurizing tower (4), flue end is connected with chimney (2)；The air inlet of its coal pulverizer (17) passes through pipeline
III (15) connect pressure fan (14), and have the air preheater (16) on flue, the outlet of coal pulverizer on pipeline III
To combustion chamber；Be characterized in that: the entrance side or outlet side of the deduster are equipped with the heat exchanger (5) being located in flue, described to change
The air inlet of hot device is equipped with blower (18), and the gas outlet of the heat exchanger is exported in side flue by pipeline I (7) and desulfurizing tower
Hot-air intake (6) connection, and on pipeline I be equipped with air door I (8)；The gas outlet of the heat exchanger also passes through pipeline II
(11) it is connected to the air inlet of pressure fan, and air door II (12) is housed on pipeline II.
2. boiler smoke wind blending heating regulating system according to claim 1, it is characterised in that: the blower (18) is frequency conversion
Blower, the air door I, air door II have the actuator for adjusting aperture.
3. boiler smoke wind blending heating regulating system according to claim 2, it is characterised in that: further include having controller (19)
And following measuring point:
Air themperature measuring point (20), the atmospheric pressure measuring point (21) of outside；
Temperature point I (22) positioned at flue end；
Temperature point II (23) in heat exchanger exit flue；
Temperature point III (24) on heat exchanger exit pipeline I；
Temperature point IV (25) on coal pulverizer outlet conduit；
The measuring unit of each temperature point and atmospheric pressure measuring point is connected to controller, controller also with the speed regulation of blower
Actuator II (13) the control line connection of device, the actuator I (9) of air door I, air door II, to control the wind-force size and air door I of blower
With the aperture of air door II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820467230.2U CN208365576U (en) | 2018-03-30 | 2018-03-30 | A kind of boiler smoke wind blending heating regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820467230.2U CN208365576U (en) | 2018-03-30 | 2018-03-30 | A kind of boiler smoke wind blending heating regulating system |
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| Publication Number | Publication Date |
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| CN208365576U true CN208365576U (en) | 2019-01-11 |
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| CN201820467230.2U Active CN208365576U (en) | 2018-03-30 | 2018-03-30 | A kind of boiler smoke wind blending heating regulating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534170A (en) * | 2018-03-30 | 2018-09-14 | 珠海市华远自动化科技有限公司 | A kind of boiler smoke wind blending heating regulating system and its control method |
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2018
- 2018-03-30 CN CN201820467230.2U patent/CN208365576U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108534170A (en) * | 2018-03-30 | 2018-09-14 | 珠海市华远自动化科技有限公司 | A kind of boiler smoke wind blending heating regulating system and its control method |
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