CN106705113A - Safety explosion-proof device and method for enabling coal boiler to use urn high-volatility coal as fuel, of intermediate storage type coal pulverizing system - Google Patents
Safety explosion-proof device and method for enabling coal boiler to use urn high-volatility coal as fuel, of intermediate storage type coal pulverizing system Download PDFInfo
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- CN106705113A CN106705113A CN201611144706.0A CN201611144706A CN106705113A CN 106705113 A CN106705113 A CN 106705113A CN 201611144706 A CN201611144706 A CN 201611144706A CN 106705113 A CN106705113 A CN 106705113A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M11/00—Safety arrangements
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Abstract
The invention discloses a safety explosion-proof device and method for enabling a coal boiler to use urn high-volatility coal as fuel instead of coal, of an intermediate storage type coal pulverizing system. According to the safety explosion-proof device, a hole is formed in a side wall of an outlet flue of a draught fan; a low-temperature furnace fume sucking hydraucone is arranged at the hole; the low-temperature furnace fume sucking hydraucone is connected with a reduced tee of a low-temperature furnace fume system through a low-temperature furnace fume main tube; two branches of the reduced tee of the low-temperature furnace fume system are respectively connected to coal pulverizer inlets through low-temperature furnace fume branching tubes. The safety explosion-proof device has the advantages that (1) a cold furnace fume system is easy to arrange; (2) no influence is generally generated on fume extraction temperature; (3) requirements for tubes and valves are low; and (4) difficulties in construction and maintenance are low.
Description
Technical field
Singly enter singly to go out low speed coal mill the ball type pulverizer system bituminous coal fired boiler the present invention relates to one kind outfit and change burning volatilization high
Point, low moisture coal（VdafUp to 49%, Mt is 10%）When safe explosion-proof device.The device be not only prevented effectively from change burning height wave
Pulverized coal preparation system explosion during hair point ature of coal, it is not necessary to set up power set, is ensureing that Mill output meets boiler band nominal output
Lower safe and stable operation.
Background technology
Introduce at present the problems of, illustrated by taking certain A steam power plant as an example below, certain A steam power plants 420t/h bituminous coal pot
Stove is equipped with two sets of the ball type pulverizer systems, and original design uses coal VdafIt is 30%, MtIt is 9.5%.By the shadow of current coal market
Ring, the actual fire coal V of the power plantdafSubstantially between 45%~49%, 17 percentage points are higher by than design load maximum.Current coal-fired category
In dangerously explosive coal, coal dust explosion power is strong, destructive big, and expensive damage is caused to site safety production.According to statistics
There are 6 pulverized coal preparation systems and dodge quick-fried event in Jin Liangniangai factories, wherein 4 sudden strains of a muscle of pulverized coal preparation system generation are quick-fried, and Pulverized Coal Bin occurs 2 sudden strains of a muscle altogether
It is quick-fried.It can be seen that, how effectively to prevent from changing explosion of Coal Pulverizing System when burning high volatile ature of coal, it is the ball type pulverizer system bituminous coal fired boiler
The emphasis of safety in production.
But, it is following different that A factories arrange and change that the aspects such as burning ature of coal are present in equipment：1. it is to close that pulverized coal preparation system inerting is explosion-proof
Key.Different from the ball type pulverizer system bituminous coal fired boiler burning high-moisture lignite, the factory currently changes burning ature of coal and belongs to low moisture（With it is brown
Coal facies ratio）, high-volatile coal, pulverized coal preparation system drying capacity is sufficient.Therefore, it is the primary problem for solving that pulverized coal preparation system is explosion-proof.
If A factories will effect a radical cure the problem for changing explosion of Coal Pulverizing System when burning high-volatile coal, pulverized coal preparation system whole process inerting is prioritizing selection
Scheme.2. pulverized coal preparation system arrangement is becomed privileged.Under normal circumstances, the coal pulverizer of the ball type pulverizer system is arranged in stokehold, and A factories two
After platform coal pulverizer is arranged in stove.
The content of the invention
Goal of the invention：Invention provides a kind of the ball type pulverizer system bituminous coal fired boiler and changes burning high volatile coal safe explosion-proof device
Method, it is the problems of conventional the purpose is to solve.
Technical scheme：Invention is achieved through the following technical solutions：
The ball type pulverizer system bituminous coal fired boiler changes burning high volatile coal safe explosion-proof device, it is characterised in that：The device is in air inducing
Perforate on machine exhaust pass side wall, one low-temperature furnace smoke suction horn mouth of arrangement, low-temperature furnace smoke suction horn mouth passes through low temperature oven
Cigarette main pipe connects the reduced tee of low-temperature furnace smoke system, and two branch roads of the reduced tee of low-temperature furnace smoke system are by low
Warm stove cigarette branched pipe is connected to coal pulverizer inlet.
Low-temperature furnace smoke shutoff door is provided with low-temperature furnace smoke main pipe, low-temperature furnace smoke regulation is provided with low-temperature furnace smoke branched pipe
Door.
The position of coal pulverizer inlet is the position of former explosion proof door.
It is provided with tube wall rocking equipment at the standpipe of low-temperature furnace smoke main pipe, tube wall rocking equipment includes fixed mount, two-sided
Gear ring, internal gear, external gear and lever shell fragment；
Two-sided gear ring is inner ring and outer ring structure with teeth, and fixed mount and double cog snare are fixed outside low-temperature furnace smoke main pipe
Be fixedly connected between frame and low-temperature furnace smoke main pipe outer wall, two-sided gear ring with diameter greater than low-temperature furnace smoke main pipe, two-sided gear ring activity
Be arranged on fixed mount, two-sided gear ring can be rotated relative to fixed mount, and internal gear and external gear are arranged on fixation by rotating shaft
On frame, internal gear and external gear are divided into inside and outside two-sided gear ring, and internal gear is engaged with the internal tooth of two-sided gear ring, external gear
External tooth with two-sided gear ring is engaged；
Lever shell fragment is arranged on fixed mount by the axle with reduction torsion spring, and the axle with reduction torsion spring is arranged on lever shell fragment
The position at non-two ends cause that lever shell fragment forms elastic lever structure, to contact low-temperature furnace smoke female for one end of lever shell fragment when static
The outer wall of pipe, the rotating shaft of internal gear is upwardly extended and set in upper end beats bar, and it is the structure rotated with internal gear to beat bar,
The other end for beaing lever shell fragment of discontinuity when bar is rotated is beaten so that lever shell fragment is tilted and leaves low-temperature furnace smoke mother
The outer wall of pipe, beats after bar separates with lever shell fragment, and to contact low-temperature furnace smoke again female for lever shell fragment in the presence of reduction torsion spring
The outer wall of pipe forms the structure for beaing outer wall.
Horizontal bevel gear, horizontal bevel gear and the longitudinal direction being arranged on horizontal input shaft are provided with the rotary shaft of external gear
Bevel gear engages, and horizontal input shaft connects hand crank or motor.
Lever shell fragment and corresponding internal gear and bar is beaten for one group is beaten unit, along the outer wall of low-temperature furnace smoke main pipe
Multiple is set and beats unit.
Oblique ash grate plate is provided with the low-temperature furnace smoke main pipe of the lower section of fixed mount, in low temperature corresponding with ash grate plate
Shoot door is provided with the wall of stove cigarette main pipe.
Changed using above-mentioned the ball type pulverizer system bituminous coal fired boiler and burn the peace that high volatile coal safe explosion-proof device is implemented
Full explosion-proof method, it is characterised in that the flue side that the method exports air-introduced machine, i.e. absolute altitude is about at 7.4m, opens 1 φ
The smoking mouthful of 1000mm, draws black furnace cigarette main pipe, and threeway is accessed after passing through air-introduced machine factory building wall 10m along desulfurization bypass flue
Pipe, two branched pipes are arranged symmetrically, and unilateral black furnace cigarette branched pipe passes through factory building wall, after adjustment direction under wear 9m platforms, access
The coal pulverizer inlet of respective respective side is at explosion proof door.
The low-temperature flue gas that air-introduced machine is exported are drawn into coal pulverizer inlet by this method, and its power source is negative from coal pulverizer inlet
Pressure differential between pressure and extraction point, is changed by adjusting coal pulverizer inlet negative pressure and takes out heat-utilizing stove smoke, so as to change coal-grinding
Machine outlet temperature and weary gas inerting degree.
Advantageous effect：The present invention provides a kind of the ball type pulverizer system bituminous coal fired boiler and changes burning high volatile coal safety anti-explosive dress
Method is put, the present invention need not set up power set, it completely may be used under conditions of additionally power-equipment is not increased in actual motion
Controlled below 16% with by pulverized coal preparation system end oxygen content, and coal pulverizer is gone out into one's intention as revealed in what one says powder temperature control at 60 DEG C~70 DEG C, into
Work(solves 420t/h bituminous coal fired boiler the ball type pulverizer systems and changes the explosion of Coal Pulverizing System burnt and faced when high volatile, low moisture coal
Problem, while not influenceing unit on-load ability.
The low-temperature furnace smoke exhaust gas volumn according to needed for pulverized coal preparation system reaches requirement of explosion proof, flue gas flow rate exists in low-temperature furnace smoke pipeline
Between 16m/s ~ 23m/s, meet DL/T5121-2000《Thermal power plant cigarette wind pulverized coal channel designing technique code》In correlation
Regulation.By calculating low-temperature furnace smoke system drag overall between 800Pa ~ 1400Pa, and the actual pressure at two ends of A factories is poor（Low temperature oven
Cigarette is exported and is grinding into a mouthful pressure differential）Substantially between 1800Pa ~ 2000Pa.It can be seen that, A factories low-temperature furnace smoke sucking mouthful and coal pulverizer inlet
Between pressure difference can overcome low-temperature furnace smoke SR completely.In addition, the number of required low-temperature flue gas amount can be in actual motion
In realized by adjusting regulation on coal pulverizer inlet negative pressure or low-temperature furnace smoke pipeline door.
The specific advantage of the device is as follows：1. black furnace cigarette system is easily arranged.From unlike conventional boiler, two sets of the power plant
It is nearer apart from air-introduced machine exhaust pass after pulverized coal preparation system is arranged in stove, it is easy to the arrangement of pipeline.2. do not have substantially to exhaust gas temperature
Influence.Because low-temperature furnace smoke temperature and warm air are approached, warm air is may replace in operation and participates in pulverized coal preparation system regulation.3. to tubing and valve
Door requires low.Because the black furnace cigarette for extracting belongs to low temperature, low cloud of dust gas, pipeline and valve use common carbon steel with regard to energy
Meet and require.4. construction and maintenance difficulties are low.Take out black furnace mouth basic with coal pulverizer inlet in sustained height, pipeline construction and dimension
Repair conveniently.
Brief description of the drawings：
Fig. 1 is present invention arrangement schematic diagram.
Fig. 2 is reducer tee component diagram in case history.
Fig. 3 is hot stove cigarette branched pipe access coal pulverizer inlet explosion proof door schematic diagram in case history.
Fig. 4 is the structural representation of tube wall rocking equipment.
Fig. 5 is the vertical view cutaway drawing of tube wall rocking equipment.
Specific embodiment：
As shown in figure 1, invention provides a kind of the ball type pulverizer system bituminous coal fired boiler changes burning high volatile coal safe explosion-proof device, should
Device perforate on the side wall of air-introduced machine exhaust pass 1, one low-temperature furnace smoke suction horn mouth 2 of arrangement, low-temperature furnace smoke suction loudspeaker
Mouth 2 connects the reduced tee 5 of low-temperature furnace smoke system by low-temperature furnace smoke main pipe 4, the reduced tee 5 of low-temperature furnace smoke system
Two branch roads are connected to coal pulverizer inlet 8 by low-temperature furnace smoke branched pipe 7.
Low-temperature furnace smoke shutoff door 3 is provided with low-temperature furnace smoke main pipe 4, low-temperature furnace smoke is provided with low-temperature furnace smoke branched pipe 7
Regulation door 6.
The position of coal pulverizer inlet 8 is the position of former explosion proof door 9.
It is provided with tube wall rocking equipment at the standpipe of low-temperature furnace smoke main pipe 4, tube wall rocking equipment includes fixed mount 10, double
Face gear ring 11, internal gear 12, external gear 13 and lever shell fragment 14；
Two-sided gear ring 11 is inner ring and outer ring structure with teeth, and fixed mount 10 and two-sided gear ring 11 are enclosed within low-temperature furnace smoke main pipe 4
Outward, be fixedly connected between fixed mount 10 and the outer wall of low-temperature furnace smoke main pipe 4, two-sided gear ring 11 with diameter greater than low-temperature furnace smoke main pipe 4,
The activity of two-sided gear ring 11 is arranged on fixed mount 10, and two-sided gear ring 11 can rotate relative to fixed mount 10, internal gear 12 and outer
Gear 13 is arranged on fixed mount 10 by rotating shaft, and internal gear 12 and external gear 13 are divided into inside and outside two-sided gear ring 11,
Internal gear 12 is engaged with the internal tooth of two-sided gear ring 11, and external gear 13 is engaged with the external tooth of two-sided gear ring 11；
Lever shell fragment 14 is arranged on fixed mount 10 by the axle 15 with reduction torsion spring, and the axle 15 with reduction torsion spring is arranged on
The position at the non-two ends of lever shell fragment 14 causes that lever shell fragment 14 forms elastic lever structure, one end of lever shell fragment 14 when static
The outer wall of low-temperature furnace smoke main pipe 4 is contacted, the rotating shaft of internal gear 12 is upwardly extended and set in upper end beats bar 16, and beaing bar 16 is
With the structure that internal gear 12 is rotated, the other end for beaing lever shell fragment 14 of discontinuity when bar 16 is rotated is beaten so that thick stick
Bar shell fragment 14 is tilted and leaves the outer wall of low-temperature furnace smoke main pipe 4, is beaten after bar 16 separates with lever shell fragment 14, in reduction torsion spring
The outer wall that the lower lever shell fragment 14 of effect contacts low-temperature furnace smoke main pipe 4 again forms the structure for beaing outer wall.Beat the front end of bar 16
It is round and smooth structure.
Be provided with horizontal bevel gear 17 in the rotary shaft of external gear 13, horizontal bevel gear 17 be arranged on horizontal input shaft 19
On longitudinal bevel gear 18 engage, horizontal input shaft 19 connection hand crank or motor.
Lever shell fragment 14 and corresponding internal gear 12 and bar 16 is beaten for one group is beaten unit, along low-temperature furnace smoke main pipe
4 outer wall sets multiple and beats unit.
Is provided with oblique ash grate plate 20 in the low-temperature furnace smoke main pipe 4 of the lower section of fixed mount 10, with ash grate plate 20 pairs
Shoot door 21 is provided with the wall of the low-temperature furnace smoke main pipe 4 answered.
The main effect of the tube wall rocking equipment is exactly to be used to shake the outer wall of low-temperature furnace smoke main pipe 4 so that using for a long time
The flue dust dirt for being deposited in tube wall afterwards drops with vibrations, is conducive to clearing up tube wall, when it is used, crank or motor
External gear 13 is driven to rotate, external gear 13 engages two-sided gear ring 11 and rotates, the engagement internal gear 12 of two-sided gear ring 11 is rotated, and then band
The dynamic bar 16 that beats is rotated and intermittent beats lever shell fragment 14 so that lever shell fragment 14 is because the effect of lever and reduction torsion spring
The outer wall for leaving and beaing low-temperature furnace smoke main pipe 4 of one end discontinuity that lower and low-temperature furnace smoke main pipe 4 is contacted, and then reach vibrations
The purpose of deashing.The black dirt of removing is fallen in ash grate plate 20 and by the dust out of shoot door 21.
The ball type pulverizer system bituminous coal fired boiler changes the safety anti-explosive method that burning high volatile coal safe explosion-proof device is implemented,
The flue side that the method exports air-introduced machine, i.e. absolute altitude is about at 7.4m, opens 1 smoking of φ 1000mm mouthful, draws black furnace
Cigarette main pipe, three-way pipe is accessed after passing through air-introduced machine factory building wall 10m along desulfurization bypass flue, and two branched pipes are arranged symmetrically,
Unilateral black furnace cigarette branched pipe passes through factory building wall, after adjustment direction under wear 9m platforms, the coal pulverizer inlet for accessing respective respective side is
At explosion proof door.
In Fig. 3, an explosion proof door 9 is arranged in every former design in the side of the coal spout of coal pulverizer 10, is taken in engineering construction example
Disappear explosion proof door 9, and low-temperature furnace smoke branched pipe 7 is respectively connected to the position of former explosion proof door 9 of respective side.Without perforate again.
If no longer changing burning low moisture, high-volatile coal in practice in engineering, can be by the shut-off in low-temperature furnace smoke system
Regulation 6 Close Alls of door on door 3 and branched pipe, you can return to original pulverized coal preparation system mode of operation operation.
The low-temperature flue gas that air-introduced machine is exported are drawn into coal pulverizer inlet by this method, and its power source is negative from coal pulverizer inlet
Pressure differential between pressure and extraction point, is changed by adjusting coal pulverizer inlet negative pressure and takes out heat-utilizing stove smoke, so as to change coal-grinding
Machine outlet temperature and weary gas inerting degree.
Explosion-protection equipment by setting up low-temperature furnace smoke sucking system of the invention, reaches the ball type pulverizer system bituminous coal fired boiler and changes burning
Safe and stable operation when low moisture, high-volatile coal.
Claims (9)
1. the ball type pulverizer system bituminous coal fired boiler changes burning high volatile coal safe explosion-proof device, it is characterised in that：The device is drawing
Fan outlet flue（1）Perforate on side wall, one low-temperature furnace smoke suction horn mouth of arrangement（2）, low-temperature furnace smoke suction horn mouth（2）
By low-temperature furnace smoke main pipe（4）Connect the reduced tee of low-temperature furnace smoke system（5）, the reduced tee of low-temperature furnace smoke system
（5）Two branch roads pass through low-temperature furnace smoke branched pipe（7）It is connected to coal pulverizer inlet（8）.
2. the ball type pulverizer system bituminous coal fired boiler according to claim 1 changes burning high volatile coal safe explosion-proof device, its
It is characterised by：Low-temperature furnace smoke main pipe（4）On be provided with low-temperature furnace smoke shutoff door（3）, low-temperature furnace smoke branched pipe（7）On be provided with it is low
Warm stove cigarette adjusts door（6）.
3. the ball type pulverizer system bituminous coal fired boiler according to claim 1 changes burning high volatile coal safe explosion-proof device, its
It is characterised by：Coal pulverizer inlet（8）Position be former explosion proof door（9）Position.
4. the ball type pulverizer system bituminous coal fired boiler according to claim 1 changes burning high volatile coal safe explosion-proof device, its
It is characterised by：In low-temperature furnace smoke main pipe（4）Standpipe at be provided with tube wall rocking equipment, tube wall rocking equipment includes fixed mount
（10）, two-sided gear ring（11）, internal gear（12）, external gear（13）With lever shell fragment（14）；
Two-sided gear ring（11）It is inner ring and outer ring structure with teeth, fixed mount（10）With two-sided gear ring（11）It is enclosed within low-temperature furnace smoke
Main pipe（4）Outward, fixed mount（10）With low-temperature furnace smoke main pipe（4）It is fixedly connected between outer wall, two-sided gear ring（11）With diameter greater than
Low-temperature furnace smoke main pipe（4）, two-sided gear ring（11）Movable is arranged on fixed mount（10）On, two-sided gear ring（11）Can be relative to fixation
Frame（10）Rotate, internal gear（12）And external gear（13）Fixed mount is arranged on by rotating shaft（10）On, internal gear（12）And external tooth
Wheel（13）It is divided into two-sided gear ring（11）Inside and outside, internal gear（12）With two-sided gear ring（11）Internal tooth engagement, external gear
（13）With two-sided gear ring（11）External tooth engagement；
Lever shell fragment（14）By the axle with reduction torsion spring（15）It is arranged on fixed mount（10）On, the axle with reduction torsion spring
（15）It is arranged on lever shell fragment（14）The position at non-two ends cause lever shell fragment（14）Form elastic lever structure, thick stick when static
Bar shell fragment（14）One end contact low-temperature furnace smoke main pipe（4）Outer wall, internal gear（12）Rotating shaft upwardly extend and set in upper end
Put and beat bar（16）, beat bar（16）It is with internal gear（12）The structure of rotation, beats bar（16）Discontinuity when rotation
Beat lever shell fragment（14）The other end cause lever shell fragment（14）Tilt and leave low-temperature furnace smoke main pipe（4）Outer wall, strike
Make bar（16）With lever shell fragment（14）After separating, the lever shell fragment in the presence of reduction torsion spring（14）Again low-temperature furnace smoke is contacted female
Pipe（4）Outer wall formed and beat the structure of outer wall.
5. the ball type pulverizer system bituminous coal fired boiler according to claim 4 changes burning high volatile coal safe explosion-proof device, its
It is characterised by：External gear（13）Rotary shaft on be provided with horizontal bevel gear（17）, horizontal bevel gear（17）Be arranged on transverse direction
Input shaft（19）On longitudinal bevel gear（18）Engagement, horizontal input shaft（19）Connection hand crank or motor.
6. the ball type pulverizer system bituminous coal fired boiler according to claim 3 or 4 changes burning high volatile coal safe explosion-proof device,
It is characterized in that：Lever shell fragment（14）And corresponding internal gear（12）With beat bar（16）Unit is beaten for one group, along low
Warm stove cigarette main pipe（4）Outer wall set multiple beat unit.
7. the ball type pulverizer system bituminous coal fired boiler according to claim 6 changes burning high volatile coal safe explosion-proof device, its
It is characterised by：Fixed mount（10）Lower section low-temperature furnace smoke main pipe（4）Inside it is provided with oblique ash grate plate（20）, combed with ash
Plate（20）Corresponding low-temperature furnace smoke main pipe（4）Wall on be provided with shoot door（21）.
8. it is real burning high volatile coal safe explosion-proof device institute to be changed using the ball type pulverizer system bituminous coal fired boiler described in claim 1
The safety anti-explosive method applied, it is characterised in that the flue side that the method exports air-introduced machine, i.e. absolute altitude is about at 7.4m, opens 1
The smoking mouthful of individual φ 1000mm, draws black furnace cigarette main pipe, and three are accessed after passing through air-introduced machine factory building wall 10m along desulfurization bypass flue
Siphunculus, two branched pipes are arranged symmetrically, unilateral black furnace cigarette branched pipe pass through factory building wall, after adjustment direction under wear 9m platforms, connect
Enter at the coal pulverizer inlet i.e. explosion proof door of respective respective side.
9. safety anti-explosive method according to claim 8, it is characterised in that：The low-temperature flue gas that this method exports air-introduced machine
Be drawn into coal pulverizer inlet, its power source from the pressure differential between coal pulverizer inlet negative pressure and extraction point, by adjusting coal-grinding
Machine entrance negative pressure takes out heat-utilizing stove smoke to change, so as to change pulverizer outlet temperature and weary gas inerting degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611144706.0A CN106705113A (en) | 2016-12-13 | 2016-12-13 | Safety explosion-proof device and method for enabling coal boiler to use urn high-volatility coal as fuel, of intermediate storage type coal pulverizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611144706.0A CN106705113A (en) | 2016-12-13 | 2016-12-13 | Safety explosion-proof device and method for enabling coal boiler to use urn high-volatility coal as fuel, of intermediate storage type coal pulverizing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106705113A true CN106705113A (en) | 2017-05-24 |
Family
ID=58935797
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611144706.0A Pending CN106705113A (en) | 2016-12-13 | 2016-12-13 | Safety explosion-proof device and method for enabling coal boiler to use urn high-volatility coal as fuel, of intermediate storage type coal pulverizing system |
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| CN (1) | CN106705113A (en) |
Cited By (2)
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| CN108167859A (en) * | 2018-01-31 | 2018-06-15 | 华电电力科学研究院有限公司 | The ball type pulverizer system bituminous coal fired boiler, which is mixed, burns 50% lignite safe explosion-proof device and method |
| CN109210562A (en) * | 2018-09-04 | 2019-01-15 | 华电电力科学研究院有限公司 | A kind of device and its working method explosion-proof for π type boiler the ball type pulverizer system |
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