CN109631014A - A kind of pulverized-coal fired boiler and its remodeling method of chain-grate boiler transformation - Google Patents
A kind of pulverized-coal fired boiler and its remodeling method of chain-grate boiler transformation Download PDFInfo
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- CN109631014A CN109631014A CN201910133163.XA CN201910133163A CN109631014A CN 109631014 A CN109631014 A CN 109631014A CN 201910133163 A CN201910133163 A CN 201910133163A CN 109631014 A CN109631014 A CN 109631014A
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- burner hearth
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- 239000003245 coal Substances 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000009466 transformation Effects 0.000 title claims abstract description 13
- 238000007634 remodeling Methods 0.000 title claims abstract description 8
- 239000003546 flue gas Substances 0.000 claims abstract description 37
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000002485 combustion reaction Methods 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 235000019504 cigarettes Nutrition 0.000 claims description 12
- 239000000779 smoke Substances 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 3
- 239000002817 coal dust Substances 0.000 abstract description 16
- 230000005855 radiation Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 239000012716 precipitator Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000011426 transformation method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B30/00—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber
- F23B30/02—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts
- F23B30/06—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts with fuel supporting surfaces that are specially adapted for advancing fuel through the combustion zone
- F23B30/08—Combustion apparatus with driven means for agitating the burning fuel; Combustion apparatus with driven means for advancing the burning fuel through the combustion chamber with movable, e.g. vibratable, fuel-supporting surfaces; with fuel-supporting surfaces that have movable parts with fuel supporting surfaces that are specially adapted for advancing fuel through the combustion zone with fuel-supporting surfaces that move through the combustion zone, e.g. with chain grates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
The invention discloses the pulverized-coal fired boilers and its remodeling method of a kind of transformation of chain-grate boiler, belong to boiler technology field, including boiler body, it is disposed with burner hearth, middle part flue and back-end ductwork along air current flow direction in boiler body, roof of the furnace is provided with the coal burner to burn downwards, and burner hearth extends along the vertical direction, burner hearth bottom is connected to middle part flue, middle part flue is horizontally extending, and water-cooling wall is provided with outside burner hearth and middle part flue, is filled in water-cooling wall equipped with heat-conducting medium.The present invention passes through the burner hearth and horizontally extending middle part flue extended along the vertical direction, coal burner is arranged in roof of the furnace, makes the combustion flame of coal dust that L shape be presented, is conducive to extend the burning time of coal dust, so that the burning of coal dust is more abundant, the efficiency of combustion of pulverized-coal fired boiler is improved.By the radiations heat energy of thermal-flame and flue gas in water wall absorption burner hearth and middle part flue, the utilization rate of the energy is improved, reduces the temperature of the flue gas of pulverized-coal fired boiler discharge.
Description
Technical field
The pulverized-coal fired boiler being transformed the present invention relates to boiler plant technical field more particularly to a kind of chain-grate boiler and its transformation
Method.
Background technique
Chain-grate boiler is the higher a kind of layer of burner of mechanization degree, is gained the name because its fire grate is similar to chain-type crawler belt,
It is that a kind of wide type of furnace is used in Industrial Boiler.
Wherein, combustion coal chain boiler mainly includes that coaling machine, traveling-grate stoker, boiler body, slag remover and economizer etc. are set
Standby, burning of coal process is completed on the move, stable combustion condition, but the efficiency of combustion of chain-grate boiler is lower, is generated
Flue gas in it is more containing harmful substance, it is seriously polluted, and flue-gas temperature is higher, causes the waste of the energy.
Summary of the invention
It is existing to solve the purpose of the present invention is to provide the pulverized-coal fired boiler and its remodeling method of a kind of transformation of chain-grate boiler
Chain boiler combustion low efficiency in technology, the harmful substances from flue gases of generation is more, and seriously polluted and flue-gas temperature is higher, causes
The problem of energy waste.
As above design, the technical scheme adopted by the invention is that:
A kind of pulverized-coal fired boiler of chain-grate boiler transformation, including boiler body, the boiler body are interior along air current flow direction
It is disposed with burner hearth, middle part flue and back-end ductwork, the roof of the furnace is provided with the coal burner to burn downwards, described
Burner hearth extends along the vertical direction, and the burner hearth bottom is connected to the middle part flue, and the middle part flue prolongs in the horizontal direction
It stretches, water-cooling wall is provided with outside the burner hearth and middle part flue, is filled in the water-cooling wall equipped with heat-conducting medium.
Further, also there is secondary furnace, the secondary furnace is connected to the middle part flue and described in the boiler body
Back-end ductwork.
Further, the back-end ductwork includes the first flue and the second flue being connected, the first flue connection
Firewall is provided between the secondary furnace, second flue and the secondary furnace.
Further, the pulverized-coal fired boiler further includes drum, and the drum is set at the top of the back-end ductwork, and described
Drum is connected to the water-cooling wall outside the middle part flue.
Further, the pulverized-coal fired boiler further includes header and convection tube, and the convection tube and the header are respectively positioned on institute
It states in boiler body, and is all connected to the drum.
Further, the back-end ductwork extends along direction and is arranged at intervals with multiple gear cigarette water extended in vertical direction
Cold wall, the gear cigarette water-cooling wall are connected to the drum, are configured as changing the flow direction of flue gas.
Further, the pulverized-coal fired boiler further includes SNCR device, and the SNCR device is set in the burner hearth.
Further, the pulverized-coal fired boiler further includes smoke exhaust pipe, and the smoke exhaust pipe is connected to the back-end ductwork.
Further, the pulverized-coal fired boiler further includes economizer, and the economizer is set in the smoke exhaust pipe.
To achieve the above object, present invention also provides a kind of remodeling methods of chain-grate boiler, form coal described above
Powder boiler removes the traveling-grate stoker of the chain-grate boiler, and all has water cooling outside the setting of the feed end of the chain-grate boiler
The burner hearth and middle part flue of wall, the middle part flue are connected to the combustion chamber of the chain-grate boiler, and the roof of the furnace is provided with
The coal burner to burn downwards.
The invention has the benefit that
The pulverized-coal fired boiler of chain-grate boiler transformation proposed by the present invention, by the way that the burner hearth and Yan Shui that extend along the vertical direction is arranged
Square to extension middle part flue, and roof of the furnace is provided with coal burner so that L shape is presented in the combustion flame of coal dust,
It is conducive to extend the burning time of coal dust, so that the burning of coal dust is more abundant, improves the efficiency of combustion of pulverized-coal fired boiler.By
Water-cooling wall is set outside burner hearth and middle part flue, absorbs the radiations heat energy of burner hearth and thermal-flame and flue gas in the flue of middle part, mentions
The utilization rate of high-energy source reduces the temperature of the flue gas of pulverized-coal fired boiler discharge.
Burner hearth and middle part cigarette is arranged by the feed end in chain-grate boiler in the remodeling method of chain-grate boiler proposed by the present invention
Road can be improved the efficiency of combustion of pulverized-coal fired boiler, improve the utilization rate of the energy.
Detailed description of the invention
Fig. 1 is chain-grate boiler structural schematic diagram provided by the invention；
Fig. 2 is the structural schematic diagram of pulverized-coal fired boiler provided by the invention.
In figure:
1, boiler body；11, burner hearth；111, coal burner；12, middle part flue；13, secondary furnace；141, the first flue；
142, the second flue；15, firebreak；16；Firewall；
2, water-cooling wall；21, water outlet；
31, drum；32, header；33, convection tube；34, cigarette water-cooling wall is kept off；
4, smoke exhaust pipe；41, economizer；
5, deslagging device；
6, boiler body；61, combustion chamber；62, flue；63, traveling-grate stoker；
7, burner.
Specific embodiment
To keep the technical problems solved, the adopted technical scheme and the technical effect achieved by the invention clearer, below
In conjunction with attached drawing and pass through specific embodiment to further illustrate the technical scheme of the present invention.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing and it is not all.
In the description of the present embodiment unless specifically defined or limited otherwise, term " connected ", " connection ", " fixation "
It shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or is integral；It can be mechanical connection,
It is also possible to be electrically connected；It can be directly connected, can also can be inside two elements indirectly connected through an intermediary
The interaction relationship of connection or two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present embodiment.
In the present embodiment unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it
"lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to
Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above "
One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special
Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only
Indicate that first feature horizontal height is less than second feature.
In the description of the present embodiment, term " on ", "lower", " right side ", etc. orientation or positional relationships be based on shown in attached drawing
Orientation or positional relationship, be merely for convenience of description and simplification operation, rather than the device or element of indication or suggestion meaning
It must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation to the present embodiment.This
Outside, term " first ", " second " are only used to distinguish between description, and have no special meaning.
Fig. 1 is the structural schematic diagram of chain-grate boiler provided in this embodiment.The chain-grate boiler to be transformed of the present embodiment is such as
Shown in Fig. 1, which includes boiler body 6, setting combuster 61 and the flue for being connected to combustion chamber 61 in boiler body 6
62, traveling-grate stoker 63, the 61 tapered structure in lower section of combustion chamber are provided in combustion chamber 61, and 61 side of combustion chamber is provided with burning
Device 7, coal dust are fallen on traveling-grate stoker 63 by the coal dust import on burner 7 and are ignited.
This implementation provides a kind of remodeling method of chain-grate boiler, for above-mentioned chain-grate boiler, in transformation process, dismantles
The burner 7 of chain-grate boiler feed end, and traveling-grate stoker 63 is removed, and remaining structure of chain-grate boiler remains unchanged.Then
Firebreak 15 is set far from one end of burner 7 in 61 bottom of the combustion chamber of chain-grate boiler, is arranged in the feed end of chain-grate boiler
Outside all has the burner hearth 11 and middle part flue 12 of water-cooling wall 2, and flue 12 one end in middle part is connected to burner hearth 11, and the other end is connected to chain
The combustion chamber 61 of boiler, the top of burner hearth 11 is provided with the coal burner 111 to burn downwards, at this time by the combustion of chain-grate boiler
It burns room 61 and is named as secondary furnace 13, the flue 62 of chain-grate boiler is named as back-end ductwork.After the transformation of above-mentioned chain-grate boiler, lead to
Burner hearth 11 and middle part flue 12 are crossed, can be improved the efficiency of combustion of pulverized-coal fired boiler, improves the utilization rate of the energy.
Fig. 2 is the structural schematic diagram of the pulverized-coal fired boiler of chain-grate boiler provided in this embodiment transformation, as shown in Fig. 2, this reality
It applies example and provides a kind of pulverized-coal fired boiler of chain-grate boiler transformation, which includes boiler body 1 and be set to boiler body 1
The deslagging device 5 of lower section.Wherein, in boiler body 1 along the flow direction of air-flow be disposed with burner hearth 11, middle part flue 12,
Secondary furnace 13 and back-end ductwork.Wherein, burner hearth 11 be vertical furnace chamber, extend along the vertical direction, the top of burner hearth 11 be provided with to
The coal burner 111 of lower burning can carry out coal burner 111 by the setting of coal burner 111 at 11 top of burner hearth
Protection, the lime-ash blocking coal burner 111 for avoiding coal dust firing from generating, and damage is not generated to the structure of 11 side wall of burner hearth
Wound guarantees the structural strength of 11 side wall of burner hearth.In addition, in the present embodiment, there are two the settings of coal burner 111, and two
Low two air-channel coal powder combustor of nitrogen of coal burner 111 is provided with air distribution device in burner hearth 11, passes through coal burner 111
Air distribution twice and air distribution device third time air distribution so that coal dust more full combustion in burner hearth 11, reduces the discharge of NOx
Amount improves the fuel efficiency efficiency of pulverized-coal fired boiler, and above-mentioned air distribution device is common structure in the prior art, and details are not described herein.
Above-mentioned middle part flue 12 is horizontally extending, and the bottom of burner hearth 11 is connected to middle part flue 12, by the way that edge is arranged
The middle part flue 12 that horizontal direction extends, so that L shape is presented in the combustion flame of coal dust, when being conducive to extend the burning of coal dust
Between, so that the burning of coal dust is more abundant, improve the efficiency of combustion of pulverized-coal fired boiler.In addition, outside burner hearth 11 and middle part flue 12
It is provided with water-cooling wall 2, the water outlet 21 of water-cooling wall 2 is arranged above burner hearth 11, it fills in water-cooling wall 2 equipped with heat-conducting medium,
In the present embodiment, heat-conducting medium is water, certainly in other media, heat-conducting medium can also for other can be thermally conductive gas or
Liquid.Water-cooling wall 2 is used to absorb the radiations heat energy of burner hearth 11 and thermal-flame and flue gas in middle part flue 12, passes through water-cooling wall
Heat in 2 pairs of flue gases is absorbed and utilized, and improves the utilization rate of the energy, reduces the temperature of the flue gas of pulverized-coal fired boiler discharge.
Above-mentioned secondary furnace 13 is the combustion chamber 61 of chain-grate boiler, specifically, in the bottom of the combustion chamber of chain-grate boiler 61
Side far from above-mentioned burner hearth 11 is provided with firebreak 15 along the vertical direction, and the combustion chamber 61 of chain-grate boiler is located at firebreak 15 and leans on
The space of the side of nearly middle part flue 12 forms the secondary furnace 13 of pulverized-coal fired boiler, and secondary furnace 13 is connected to middle part flue 12.It is above-mentioned
Back-end ductwork is the flue 62 of chain-grate boiler, the connection of secondary furnace 13 middle part flue 12 and back-end ductwork.
In addition, in the vertical direction, back-end ductwork is located at the top of secondary furnace 13, and coal dust burns in burner hearth 11 to be generated
Flue gas enters in back-end ductwork after middle part flue 12, secondary furnace 13, and flue gas at this time still has higher temperature, in order to right
The temperature of flue gas is adequately utilized, which further includes drum 31, header 32 and convection tube 33.Wherein, drum 31
At the top of back-end ductwork, and drum 31 is connected to the water-cooling wall 2 outside above-mentioned middle part flue 12, and header 32 is located at secondary furnace 13
It is interior, and header 32 passes through piping connection in drum 31, when flue gas flows through secondary furnace 13, header 32 and header 32 are connected to drum 31
Pipeline in heat-conducting medium absorb flue gas in heat so that the temperature of the flue gas entered in back-end ductwork further drops
It is low.
As shown in Figure 1, in the present embodiment, back-end ductwork is divided into two parts, including the first flue 141 and the second flue
142, wherein the first flue 141 is horizontally extending, and the first flue 141 is connected to secondary furnace 13, and the second flue 142 is located at
First flue, 141 lower section, and there is firewall 16, i.e. secondary furnace 13 and back-end ductwork between the second flue 142 and secondary furnace 13
For a complete chamber, chamber is interior to form secondary furnace 13 and back-end ductwork by setting firebreak 15 and firewall 16.
In order to further absorb the heat of the flue gas in back-end ductwork, direction interval is extended along in the first flue 141 and is set
Multiple gear cigarette water-cooling walls 34 are equipped with, gear cigarette water-cooling wall 34 is connected to header 32 or drum 31, can change flue gas in back-end ductwork
The heat of interior flow direction and absorption flue gas, so that flow regime of the flue gas in back-end ductwork complicates, and extends cigarette
Residence time of the gas in back-end ductwork reduces the temperature of flue gas so that the heat of flue gas is further absorbed.Above-mentioned convection tube
33 are set in the second flue 142, and are connected to drum 31, and convection tube 33 increases the heating surface of boiler, so that convection tube 33
Interior heat-conducting medium absorbs the heat of flue gas, reduces the temperature of flue gas.It is thermally conductive in above-mentioned gear cigarette water-cooling wall 34 and convection tube 33
Medium further absorbs the heat that the flue gas in back-end ductwork is entered by secondary furnace 13, improves the utilization rate of the energy, reduces cigarette
The discharge temperature of gas.
In addition, the heat-conducting medium in above-mentioned header 32, convection tube 33 and gear cigarette water-cooling wall 34 is imported into after absorbing heat
In drum 31, the heat-conducting medium in drum 31 after heating is flowed into water-cooling wall 2, is discharged by the water outlet 21 of water-cooling wall 2.
As shown in Figure 1, the pulverized-coal fired boiler further includes smoke exhaust pipe 4, smoke exhaust pipe 4 is connected to back-end ductwork, by back-end ductwork
The flue gas of outflow is discharged outside boiler body 1 through smoke exhaust pipe 4.Economizer 41 is provided in smoke exhaust pipe 4, economizer 41 is for absorbing
The heat of flue gas reduces the exhaust gas temperature of flue gas, and economizer 41 is the common structure of the prior art, and details are not described herein.
The pulverized-coal fired boiler further includes that (Selective Non-Catalytic Reduction selective non-catalytic is also by SNCR
It is former) device (not shown), SNCR device is set in burner hearth 11.When chain-grate boiler generates hot water for heating, daily
With the variation of outdoor temperature, the load of chain-grate boiler also changes therewith, and the position of flame kernel can also change, using SNCR
Method carries out denitration, often causes denitration effect bad because flue-gas temperature frequently changes.It transform chain-grate boiler as the coal dust
After boiler, the ignition temperature field distribution in the burner hearth 11 of pulverized-coal fired boiler is uniform, and aerodynamic field is stablized, and denitration efficiency is high, can
Reduce the NOx in flue gas.
The pulverized-coal fired boiler further includes deduster (not shown), and deduster is connected to smoke exhaust pipe 4, in the present embodiment,
Deduster is fiber bag precipitator, and the filter bag of fiber bag precipitator is made of the material of heatproof (>=180 DEG C), such as Bi Dafu filter
Bag.In addition, in order to enable flue gas reaches discharge standard, to the flue gas after process fiber bag precipitator dedusting using wet type alkaline process
Desulfurization overcurrent, so that the flue gas of discharge meets emission request.
Above-mentioned deslagging device 5 is set to 11 lower section of burner hearth, and 11 bottom of burner hearth is provided with dry bottom hopper, and the lime-ash in dry bottom hopper is fallen
Enter into deslagging device 5 and remove, it is preferable that deslagging device 5 is scraping plate type eliminator, and the slag dropping tube of dry bottom hopper extend into scraper-type
Below the water surface in slag remover.
To sum up, by the way that chain-grate boiler is transformed into pulverized-coal fired boiler, and pass through water-cooling wall 2, drum 31, header 32 and convection tube
The structures such as 33 absorb the heat of flue gas, so that the exhaust gas temperature of the pulverized-coal fired boiler is less than or equal to 120 DEG C, and make coal dust in furnace
Full combustion in thorax 11 and middle part flue 12, improves the efficiency of combustion of pulverized-coal fired boiler, improves energy utilization rate.
The pulverized-coal fired boiler of chain-grate boiler transformation is illustrated, the rated heating capacity of the chain-grate boiler before transformation is
21MW, efficiency of combustion 80%.Above-mentioned chain-grate boiler passes through efficiency of combustion >=98% of improved pulverized-coal fired boiler, rated heating capacity
For 29MW (up-Grading Design), specified leaving water temperature is 115 DEG C, and specified inflow temperature is 70 DEG C, and dagger-axe fourth pressure is 1.25MPa, tool
There is 30%-100% Load Regulation ability, so that pulverized-coal fired boiler is changeable in load, it being capable of continuous-stable in the frequent situation of start and stop
Safe operation.
Embodiment of above only elaborates that the basic principles and features of the invention, the present invention are not limited by above embodiment
System, without departing from the spirit and scope of the present invention, the invention also has various changes and changes, and these changes and changes are all
It falls into scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (10)
1. a kind of pulverized-coal fired boiler of chain-grate boiler transformation, which is characterized in that including boiler body (1), in the boiler body (1)
Burner hearth (11), middle part flue (12) and back-end ductwork, setting at the top of the burner hearth (11) are disposed with along air current flow direction
There is the coal burner (111) to burn downwards, the burner hearth (11) extends along the vertical direction, and the burner hearth (11) bottom is connected to
In the middle part flue (12), the middle part flue (12) is horizontally extending, the burner hearth (11) and middle part flue (12)
Outside is provided with water-cooling wall (2), is filled in the water-cooling wall (2) equipped with heat-conducting medium.
2. pulverized-coal fired boiler according to claim 1, which is characterized in that also have secondary furnace in the boiler body (1)
(13), the secondary furnace (13) is connected to the middle part flue (12) and the back-end ductwork.
3. pulverized-coal fired boiler according to claim 2, which is characterized in that the back-end ductwork includes the first flue being connected
(141) it is connected to the secondary furnace (13) with the second flue (142), first flue (141), second flue (142)
Firewall (16) are provided between the secondary furnace (13).
4. pulverized-coal fired boiler according to claim 1, which is characterized in that the pulverized-coal fired boiler further includes drum (31), described
Drum (31) is set at the top of the back-end ductwork, and the drum (31) is connected to the water of the middle part flue (12) outside
Cold wall (2).
5. pulverized-coal fired boiler according to claim 4, which is characterized in that the pulverized-coal fired boiler further includes header (32) and convection current
It manages (33), the convection tube (33) and the header (32) are respectively positioned in the boiler body (1), and are all connected to the drum
(31)。
6. pulverized-coal fired boiler according to claim 4, which is characterized in that the back-end ductwork extends along the setting of direction interval
There are multiple gear cigarette water-cooling walls (34) extended in vertical direction, the gear cigarette water-cooling wall (34) is connected to the drum (31), quilt
It is configured to change the flow direction of flue gas.
7. pulverized-coal fired boiler according to claim 1, which is characterized in that the pulverized-coal fired boiler further includes SNCR device, described
SNCR device is set in the burner hearth (11).
8. pulverized-coal fired boiler according to claim 1, which is characterized in that the pulverized-coal fired boiler further includes smoke exhaust pipe (4), described
Smoke exhaust pipe (4) is connected to the back-end ductwork.
9. pulverized-coal fired boiler according to claim 8, which is characterized in that the pulverized-coal fired boiler further includes economizer (41), institute
Economizer (41) is stated to be set in the smoke exhaust pipe (4).
10. a kind of remodeling method of chain-grate boiler forms such as described in any item pulverized-coal fired boilers of claim 1-9, feature and exists
In removing the traveling-grate stoker of the chain-grate boiler, and all have water-cooling wall outside the setting of the feed end of the chain-grate boiler
Burner hearth and middle part flue, the middle part flue are connected to the combustion chamber of the chain-grate boiler, and the roof of the furnace is provided with downwards
The coal burner of burning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910133163.XA CN109631014B (en) | 2019-02-22 | 2019-02-22 | Pulverized coal boiler transformed by chain boiler and transformation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910133163.XA CN109631014B (en) | 2019-02-22 | 2019-02-22 | Pulverized coal boiler transformed by chain boiler and transformation method thereof |
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| CN109631014A true CN109631014A (en) | 2019-04-16 |
| CN109631014B CN109631014B (en) | 2024-02-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203731393U (en) * | 2013-12-13 | 2014-07-23 | 山西蓝天环保设备有限公司 | Pulverized coal boiler with burner at top |
| CN204165038U (en) * | 2014-09-03 | 2015-02-18 | 山西蓝天环保设备有限公司 | A kind of U-shaped flame pulverized coal firing boiler |
| CN209588027U (en) * | 2019-02-22 | 2019-11-05 | 北控清洁热力有限公司 | A kind of pulverized-coal fired boiler of chain-grate boiler transformation |
-
2019
- 2019-02-22 CN CN201910133163.XA patent/CN109631014B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203731393U (en) * | 2013-12-13 | 2014-07-23 | 山西蓝天环保设备有限公司 | Pulverized coal boiler with burner at top |
| CN204165038U (en) * | 2014-09-03 | 2015-02-18 | 山西蓝天环保设备有限公司 | A kind of U-shaped flame pulverized coal firing boiler |
| CN209588027U (en) * | 2019-02-22 | 2019-11-05 | 北控清洁热力有限公司 | A kind of pulverized-coal fired boiler of chain-grate boiler transformation |
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| CN109631014B (en) | 2024-02-20 |
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