CN114849506A - Mixing system and method for coking fly ash and coal powder - Google Patents
Mixing system and method for coking fly ash and coal powder Download PDFInfo
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- CN114849506A CN114849506A CN202210638961.XA CN202210638961A CN114849506A CN 114849506 A CN114849506 A CN 114849506A CN 202210638961 A CN202210638961 A CN 202210638961A CN 114849506 A CN114849506 A CN 114849506A
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- 239000003245 coal Substances 0.000 title claims abstract description 121
- 238000004939 coking Methods 0.000 title claims abstract description 117
- 239000000843 powder Substances 0.000 title claims abstract description 57
- 239000010881 fly ash Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002956 ash Substances 0.000 claims abstract description 243
- 239000000428 dust Substances 0.000 claims abstract description 85
- 238000013329 compounding Methods 0.000 claims abstract description 27
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 238000007599 discharging Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 8
- 230000001502 supplementing effect Effects 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 6
- 239000012716 precipitator Substances 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 239000002817 coal dust Substances 0.000 description 6
- 230000032258 transport Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000007921 spray Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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Abstract
The invention provides a system and a method for mixing coking fly ash and coal powder, wherein the system for mixing coking fly ash and coal powder comprises: a pulverized coal supply unit for performing pulverized coal supply; the coking dedusting ash supply unit is used for supplying coking dedusting ash; the mixing unit is respectively communicated with the coal powder supply unit and the coking dust removal ash supply unit and is used for mixing the coal powder and the coking dust removal ash; the coal injection unit is connected with the output end of the mixing unit and is used for injecting the mixture of the coal powder and the coking dust; and the control unit is used for controlling the coal powder supply unit, the coking and dedusting ash supply unit, the mixing unit and the coal injection unit to work. In this scheme, coking dust removal ash and buggy are carried to the compounding unit through the atmospheric pressure respectively, have avoided coking dust removal ash to make the output pipeline wearing and tearing of coal pulverizer and coal pulverizer, have increased the life of coal pulverizer and output pipeline.
Description
Technical Field
The invention belongs to the field of metallurgy, and particularly relates to a mixing system and method for coking fly ash and coal powder.
Background
In order to reduce the dust emission and meet the emission standard of atmospheric pollutants, the dust-containing gas must be purified, so a certain proportion of coking dust removal ash needs to be mixed in the injected coal powder.
At present, the coking dedusting ash is mainly transferred to a coal pit through a tipping bucket, the coking dedusting ash in the coal pit is mixed with raw coal through a batching system, and the mixed coking dedusting ash and the raw coal are ground and conveyed together. Because coking dust removal ash hardness is great, lead to the coal pulverizer to damage easily among the grinding process, and coking dust removal ash carries to receiving the powder box in-process along with the buggy, because the buggy demand is great, lead to transport speed very fast, lead to pipeline wearing and tearing easily.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a system and a method for mixing coking fly ash and coal powder, which are used to solve the problems that a coal mill and a conveying pipeline are easily worn by coking fly ash in the prior art.
In order to achieve the above objects and other related objects, the present invention provides a mixing system of coking fly ash and pulverized coal, comprising:
a pulverized coal supply unit for performing pulverized coal supply;
the coking dedusting ash supply unit is used for supplying coking dedusting ash;
the mixing unit is respectively communicated with the coal powder supply unit and the coking dust removal ash supply unit and is used for mixing the coal powder and the coking dust removal ash;
the coal injection unit is connected with the output end of the mixing unit and is used for injecting the mixture of the coal powder and the coking dust;
and the control unit is used for controlling the coal powder supply unit, the coking and dedusting ash supply unit, the mixing unit and the coal injection unit to work.
Further, the coking and dust removal ash supply unit includes:
the ash collecting bin is used for collecting the coking dust;
and the top end of the ash conveying tank is communicated with the bottom end of the ash collecting bin, and the bottom end of the ash conveying tank is communicated with the mixing unit.
Furthermore, a pressure gauge for detecting the internal pressure value of the ash conveying tank is arranged at the top end of the ash conveying tank; the top end of the ash conveying tank is communicated with a pressure compensating pipe, and a pressure compensating valve is arranged on the pressure compensating pipe; a pressurizing pipe is communicated with the position, close to the bottom end, of the ash conveying tank, and a pressurizing valve is arranged on the pressurizing pipe; the pressure gauge is connected with the input end of the control unit, and the output end of the control unit is respectively connected with the pressure supplementing valve and the pressure adding valve.
Furthermore, the output end of the ash collecting bin is communicated with the input end of the ash conveying tank through a conveying pipeline, and an ash discharging valve is arranged on the conveying pipeline; the bottom end of the ash conveying tank is communicated with the mixing unit through a mixing pipeline, an ash valve for controlling ash discharge of an ash conveying valve is arranged on the mixing pipeline, and the ash discharging valve and the ash valve are respectively connected with the output end of the control unit;
before coking and dedusting ash enters the ash conveying tank, the control unit controls the ash outlet valve, the pressure supplementing valve and the pressurizing valve to be closed and controls the ash discharging valve to be opened;
after the coking and dedusting ash is fed into the ash conveying tank, the control unit controls the ash discharge valve to be closed, then controls the pressurization valve to be opened, and pressurizes the ash conveying tank to accumulate conveying pressure for conveying the coking and dedusting ash to the mixing unit in the ash conveying tank;
when the pressure gauge detects that the pressure value in the ash conveying tank is higher than a preset high value, the control unit controls the pressurization valve to be closed and controls the ash discharging valve to be opened so as to convey coking and dedusting ash into the mixing unit;
when the pressure gauge detects that the pressure value in the ash conveying tank is lower than a preset low value, the control unit controls the pressure supplementing valve to be opened so as to supplement conveying pressure in the ash conveying tank.
Furthermore, a material level meter is arranged at the top end of the ash conveying tank, and the output end of the material level meter is connected with the input end of the control unit; when the level indicator detects that the material level in the ash conveying tank reaches a preset height, the control unit controls the ash discharging valve to be closed.
Further, defeated ash can is provided with two at least, the compounding pipeline is including communicateing two defeated ash tank bottom's connecting pipe, with the compounding house steward and an at least compounding branch pipe that is used for with compounding unit intercommunication of connecting pipe intercommunication, the ash valve corresponds defeated ash can setting up and is in on the connecting pipe, be provided with the compounding main valve on the compounding house steward, be provided with a compounding valve on the compounding branch pipe, compounding main valve and a compounding valve respectively with the control unit's output is connected.
Further, the top end of the ash collecting bin is provided with a bin top exhaust dust collector used for exhausting in the ash collecting bin, the bin top exhaust dust collector is connected with the control unit, and when coking dust removal ash enters the ash collecting bin, the bin top exhaust dust collector works.
Furthermore, an air inlet pipe for loosening coking and dedusting ash in the ash collecting bin is arranged at the bottom end of the ash collecting bin, at least two output pipes which are distributed up and down are arranged at the output end of the air inlet pipe in parallel, and the output pipes are communicated with the bottom end of the ash collecting bin; and the air inlet pipe is provided with a pulse valve, and the pulse valve is connected with the control unit.
Further, a pressure relief pipe is arranged between the top end of the ash collection bin and the top end of the ash conveying tank and used for communicating the ash collection bin with the ash conveying tank, a pressure relief valve is arranged on the pressure relief pipe and connected with the control unit.
In order to achieve the above objects and other related objects, the present invention further provides a method for mixing coking fly ash and coal powder, which is applied to the above mixing system for coking fly ash and coal powder, and the method comprises:
grinding raw coal into coal powder through a coal powder supply unit;
supplying coking dedusting ash through a coking dedusting ash supply unit;
introducing the coal powder and the coking dust removal ash into a mixing unit through air pressure for mixing;
and spraying the mixed coal powder out through a coal spraying unit.
As mentioned above, the mixing system and method of the coking dust removal ash and the coal dust provided by the invention have the following beneficial effects:
in this scheme, coking dust removal ash and buggy are carried to the compounding unit through the atmospheric pressure respectively, have avoided coking dust removal ash to make the output pipeline wearing and tearing of coal pulverizer and coal pulverizer, have increased the life of coal pulverizer and output pipeline.
Drawings
FIG. 1 is a schematic view of a connection structure of a mixing system of coking fly ash and coal dust in the embodiment of the invention.
Detailed Description
Reference numerals in the drawings of the specification include: the raw coal bunker 101, the coal feeder 102, the coal pulverizer 103, the suction and discharge vehicle 201, the feeding pipe 202, the feeding valve 203, the ash collecting bunker 204, the bunker top exhaust dust remover 205, the pressure discharge pipe 206, the pressure discharge valve 207, the air inlet pipe 208, the pulse valve 209, the output pipe 210, the ash conveying tank 211, the pressurization pipe 212, the pressurization valve 213, the pressure compensation pipe 214, the pressure compensation valve 215, the level gauge 216, the pressure gauge 217, the conveying pipeline 218, the ash discharge valve 219, the connecting pipe 220, the ash discharge valve 221, the mixing main valve 222, the mixing branch valve 223, the mixing branch pipe 224, the powder collecting box body 301, the exhaust fan 302, the coal dust bunker 401 and the blowing tank 402.
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Examples
As shown in fig. 1, this embodiment provides a compounding system of coking fly ash and buggy, includes: the device comprises a coal powder supply unit, a coking and dedusting ash supply unit, a mixing unit, a coal injection unit and a control unit;
the pulverized coal supply unit comprises a raw coal bin 101, a coal feeder 102 and a coal mill 103, wherein raw coal is placed in the raw coal bin 101. The coal feeder 102 is connected to the raw coal bunker 101 and the coal mill 103, and is configured to supply raw coal in the raw coal bunker 101 to the coal mill 103 for grinding. The coal mill 103 is used to mill raw coal into pulverized coal. The output of the coal mill 103 is connected to the mixing unit by a pipe. The coal feeder 102 and the coal mill 103 are respectively connected with the control unit and controlled by the control unit to work.
The coking and dedusting unit comprises a suction and discharge vehicle 201, an ash collection bin 204 and an ash conveying tank 211, wherein the suction and discharge vehicle 201 is used for conveying coking and dedusting ash from a dry coal shed to the ash collection bin 204. The top end of the dust collecting bin 204 is connected with a feeding pipe 202, a feeding valve 203 is arranged on the feeding pipe 202, and the feeding valve 203 is connected with and controlled by the control unit. After the suction and exhaust vehicle 201 transports the coking and dedusting ash to the ash collection bin 204, the suction and exhaust vehicle 201 is connected with the ash collection bin 204 through the feeding pipe 202, so that the coking and dedusting ash in the suction and exhaust vehicle 201 enters the ash collection bin 204. Through inhaling the transportation that arranges car 201 and carry out the coking dust removal ash for the coking dust removal ash dress compares with the open-type transportation that uses the tip lorry in airtight space, can effectively avoid polluting all ring edge borders in the coking dust removal ash transportation and inhale and arrange car 201 and directly transport the coking dust removal ash to the collection ash bin 204 from putting the ash point, need not to occupy dry shed pit.
The top end of the ash collecting bin 204 is also provided with a bin top exhaust dust remover 205 for exhausting air in the ash collecting bin 204, so that the phenomenon that the pressure in the ash collecting bin 204 is too high to influence the entering of coking dust removal ash is avoided. An air inlet pipe 208 is arranged at the bottom end of the ash collecting bin 204, a pulse valve 209 is arranged on the air inlet pipe 208, and the pulse valve 209 is connected with the control unit. The output end of the air inlet pipe 208 is provided with two output pipes 210 which are distributed up and down in parallel, and the output pipes 210 are communicated with the bottom end of the dust collecting bin 204. In addition, in the present embodiment, a plurality of air inlet pipes 208 are provided, and the plurality of air inlet pipes 208 are uniformly distributed along the circumference of the bottom end of the dust collecting bin 204. The air inlet pipe 208 is internally ventilated to play a role in loosening the coking and dedusting ash in the ash collecting bin 204, so that the coking and dedusting ash in the ash collecting bin 204 is prevented from being hardened. In this embodiment, the gas introduced into the gas inlet pipe 208 is nitrogen.
The top end of the ash conveying tank 211 is communicated with the bottom end of the ash collecting bin 204 through a conveying pipeline 218, an ash discharging valve 219 is arranged on the conveying pipeline 218, and the ash discharging valve 219 is connected with the control unit. The top end of the ash conveying tank 211 is also provided with a material level gauge 216 and a pressure gauge 217 so as to detect the material level height and the pressure value in the ash conveying tank 211. The bottom end of the ash conveying tank 211 is communicated with the mixing unit through a mixing pipeline.
The top end of the ash conveying tank 211 is also communicated with a pressure compensating pipe 214, and the pressure compensating pipe 214 is provided with a pressure compensating valve 215. The bottom end of the ash conveying tank 211 is also communicated with a pressurizing pipe 212, the pressurizing pipe 212 is provided with a pressurizing valve 213, and the pressure compensating valve 215 and the pressurizing valve 213 are respectively connected with the control unit.
In one embodiment, the top end of the ash collecting bin 204 is communicated with the bottom end of the ash conveying tank 211 through a pressure discharge pipe 206, a pressure discharge valve 207 is arranged on the pressure discharge pipe 206, and the pressure discharge valve 207 is connected with the control unit.
In an embodiment, the ash conveying tanks 211 are provided with at least two, the mixing pipeline includes a connecting pipe 220 connecting the bottom ends of the two ash conveying tanks 211, a mixing main pipe communicated with the connecting pipe 220, and at least one mixing branch pipe 224 used for being communicated with the mixing unit, the ash outlet valve 221 is arranged on the connecting pipe 220 corresponding to the ash conveying tank 211, the mixing main pipe is provided with a mixing main valve 222, the mixing branch pipe 224 is provided with a mixing branch valve 223, and the mixing main valve 222 and the mixing branch valve 223 are respectively connected with the output end of the control unit. Two ash conveying tanks 211 are arranged, so that the mixing pipeline can continuously output the coking and dedusting ash.
And the mixing unit comprises a powder collecting box body 301 and an exhaust fan 302, the powder collecting box body 301 is communicated with the coal powder supply unit by the top end position, and the powder collecting box body 301 is communicated with the coking and dedusting ash supply unit by the bottom end position. Specifically, the top end position of the powder collecting box body 301 is communicated with the coal mill 103, and the bottom end position of the powder collecting box body 301 is communicated with the bottom end of the ash conveying tank 211.
The exhaust fan 302 is communicated with the top end position of the powder collecting box body 301 so as to pump the pulverized coal ground by the coal grinding machine 103 into the powder collecting box body 301. The proportion of coking dust removal ash to coal powder is generally 1: 20, so, the buggy supply volume is far greater than the supply volume of coking dust removal ash, leads to the required transport speed of buggy to be far greater than the supply speed of coking dust removal ash, consequently, separately carries buggy and coking dust removal ash in this scheme for coking dust removal ash can be carried to receiving in the powder box 301 with slower speed, and then makes the degree of wear that the compounding pipeline between receiving powder box 301 and the defeated ash can 211 caused by coking dust removal ash less.
The injection unit comprises a pulverized coal bin 401, an injection tank 402, a spray gun and the like, wherein the pulverized coal bin 401 is used for being connected with the output end of the pulverized coal collecting box body 301, the injection tank 402 is used for being connected with the bottom end of the pulverized coal bin 401, and pulverized coal and coking dust discharged from the injection tank 402 are sprayed out through the spray gun.
The control unit comprises a controller, and the controller is a PLC or a singlechip and the like.
Specifically, after the suction car 201 is connected to the dust collecting bin 204, the control unit controls the feeding valve 203 to open, so that the dust collecting bin 204 is fed. Meanwhile, the pulse valve 209 is controlled to be opened, so that air is introduced into the dust collecting bin 204; the top exhaust dust remover 205 is controlled to work continuously to perform the exhaust operation in the dust collecting bin 204, so as to prevent coking dust from entering smoothly. When the suction car 201 is disconnected from the dust collecting bin 204, the feed valve 203 is controlled to be closed.
Before coking and dedusting ash enters the ash conveying tank 211, the control unit controls the corresponding ash outlet valve 221, the pressure supplementing valve 215 and the pressurizing valve 213 to be closed, and controls the ash discharging valve 219 and the pressure discharging valve 207 to be opened. The pressure discharge pipe 206 and the pressure discharge valve 207 are arranged to prevent the pressure in the ash conveying tank 211 from being too high, and the entry of coking dust removal ash is influenced.
When the level gauge 216 on the corresponding ash conveying tank 211 detects that the level in the ash conveying tank 211 reaches a preset height, the control unit controls the corresponding ash discharging valve 219 to close, and then controls the corresponding pressurizing valve 213 to open to pressurize towards the interior of the ash conveying tank 211 so as to accumulate the conveying pressure for conveying the coked dust into the mixing unit in the ash conveying tank 211.
When the pressure gauge 217 detects that the pressure value in the ash conveying tank 211 is higher than a preset high value, the control unit controls the pressurization valve 213 to close, and controls the ash outlet valve 221, the mixing main valve 222 and the corresponding mixing branch valve 223 to open so as to convey the coking dust into the mixing unit.
When the pressure gauge 217 on the corresponding ash conveying tank 211 detects that the pressure value in the ash conveying tank 211 is lower than the preset low value, the control unit controls the corresponding pressure supplementing valve 215 to open so as to supplement the conveying pressure in the ash conveying tank 211.
When the material level in one conveying tank reaches the preset height, the control unit can control the ash discharge valve corresponding to the other ash conveying tank 211 to be opened so as to realize uninterrupted material supply.
In this scheme, coking dust removal ash and buggy are all carried to the compounding unit through the atmospheric pressure, and coking dust removal ash is followed receipts powder box 301 and is leaned on the bottom position to enter, is favorable to the homogeneous mixing between buggy and the coking dust removal ash, reduces the inhomogeneous condition that leads to jetting fluctuation of compounding and appears. And the coking dust and the coal dust are respectively conveyed to the powder collecting box body 301 through different pipelines, so that the service lives of the coal mill 103 and the pipeline are prolonged, and the maintenance cost is reduced.
Aiming at the mixing system of the coking fly ash and the coal powder, the mixing method of the coking fly ash and the coal powder is also provided, and comprises the following steps:
s1: raw coal is ground into coal powder by a coal powder supply unit.
Step S1 specifically includes:
s101: raw coal is loaded into the raw coal bunker 101.
S102: the coal feeder 102 operates to transport raw coal from the raw coal bunker 101 to the coal mill 103.
S103: the coal mill 103 grinds the raw coal into pulverized coal.
S2: the coking dust removal ash is supplied through a coking dust removal ash supply unit.
S201: the coking dust removal powder in the dust collection bin 204 is conveyed by introducing gas into the dust collection bin 204.
Specifically, the pulse valve 209 is opened, and nitrogen is introduced from the air inlet pipe 208 to the bottom end of the ash collection bin 204, so as to prevent coking and dust removal in the ash collection bin 204 from hardening.
S202: in the process of newly feeding coking and dedusting ash in the ash collecting bin 204, the exhaust is continuously discharged from the ash collecting bin 204.
Specifically, the suction and discharge vehicle 201 transports the coked fly ash from the ash discharge point to the ash collection bin 204. The suction and exhaust vehicle 201 is communicated with the dust collecting bin 204 through the feeding pipe 202, and the feeding valve 203 on the feeding pipe 202 is controlled to be opened. The top exhaust dust remover 205 works to exhaust the dust collecting bin 204, so that coking dust cannot smoothly enter the dust collecting bin 204.
S203: the coking and dust removal ash in the ash collecting bin 204 is output to the ash conveying tank 211.
Specifically, the currently required ash conveying tank 211 is selected, the corresponding ash discharge valve 219 is opened, and the corresponding ash discharge valve 221 is closed, so that the coked fly ash in the ash collection bin 204 enters the ash conveying tank 211.
S204: when the feeding in the ash conveying tank 211 is completed, the feeding in other ash conveying tanks 211 is switched.
Specifically, when the level meter 216 on the ash conveying tank 211 used detects that the level has reached the preset height, the corresponding ash discharge valve 219 is closed, the ash conveying tank 211 finishes feeding, and switching to another ash conveying tank 211 starts feeding.
S205: the ash conveying tank 211 where the feeding is completed is pressurized.
Specifically, the pressurizing valve 213 is opened, and nitrogen gas is added to the ash conveying tank 211 in which the feeding is completed, to increase the conveying pressure in the ash conveying tank 211.
S206: the coking and dedusting ash is conveyed to the mixing unit by using the air pressure in the ash conveying tank 211.
Specifically, when the pressure in the ash conveying tank 211 reaches a preset high value, the corresponding pressurizing valve 213 is closed, the corresponding ash discharging valve 221 is opened, and the main mixing valve 222 and the corresponding branch mixing valve 223 are opened, so that the coked dust removal powder in the ash conveying tank 211 is conveyed to the mixing unit under the action of air pressure.
S207: the ash conveying tank 211 is replenished with conveying pressure.
Specifically, the pressure compensating valve 215 is opened, and nitrogen is introduced into the ash conveying tank 211.
S3: and introducing the coal powder and the coking dust removal ash into a mixing unit for mixing.
Specifically, the pulverized coal is introduced from the top end of the powder collecting box 301 by using air pressure, and the coking dust removal ash is introduced from the bottom end of the powder collecting box 301 to be mixed with the pulverized coal.
S4: and spraying the mixed coal powder out through a coal spraying unit.
It should be noted that, since the method for mixing the coking precipitator dust and the coal dust is already described in the system for mixing the coking precipitator dust and the coal dust, no further description is given here.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a compounding system of coking dust removal ash and buggy which characterized in that includes:
a pulverized coal supply unit for performing pulverized coal supply;
the coking dedusting ash supply unit is used for supplying coking dedusting ash;
the mixing unit is respectively communicated with the coal powder supply unit and the coking dust removal ash supply unit and is used for mixing the coal powder and the coking dust removal ash;
the coal injection unit is connected with the output end of the mixing unit and is used for injecting the mixture of the coal powder and the coking dust;
and the control unit is used for controlling the coal powder supply unit, the coking and dedusting ash supply unit, the mixing unit and the coal injection unit to work.
2. The coking fly ash and pulverized coal mixing system according to claim 1, wherein the coking fly ash supply unit includes:
the ash collecting bin is used for collecting the coking dust;
and the top end of the ash conveying tank is communicated with the bottom end of the ash collecting bin, and the bottom end of the ash conveying tank is communicated with the mixing unit.
3. The coking fly ash and pulverized coal mixing system according to claim 2, wherein a pressure gauge for detecting the internal pressure value of the ash conveying tank is arranged at the top end of the ash conveying tank; the top end of the ash conveying tank is communicated with a pressure compensating pipe, and a pressure compensating valve is arranged on the pressure compensating pipe; a pressurizing pipe is communicated with the position, close to the bottom end, of the ash conveying tank, and a pressurizing valve is arranged on the pressurizing pipe; the pressure gauge is connected with the input end of the control unit, and the output end of the control unit is respectively connected with the pressure supplementing valve and the pressure adding valve.
4. The coking fly ash and pulverized coal mixing system according to claim 3, wherein the output end of the ash collection bin is communicated with the input end of the ash conveying tank through a conveying pipeline, and an ash discharge valve is arranged on the conveying pipeline; the bottom end of the ash conveying tank is communicated with the mixing unit through a mixing pipeline, an ash valve for controlling ash discharge of an ash conveying valve is arranged on the mixing pipeline, and the ash discharging valve and the ash valve are respectively connected with the output end of the control unit;
before coking and dedusting ash enters the ash conveying tank, the control unit controls the ash outlet valve, the pressure supplementing valve and the pressurizing valve to be closed and controls the ash discharging valve to be opened;
after the coking and dedusting ash is fed into the ash conveying tank, the control unit controls the ash discharge valve to be closed, then controls the pressurizing valve to be opened, and pressurizes the ash conveying tank to accumulate conveying pressure for conveying the coking and dedusting ash to the mixing unit in the ash conveying tank;
when the pressure gauge detects that the pressure value in the ash conveying tank is higher than a preset high value, the control unit controls the pressurization valve to be closed and controls the ash discharging valve to be opened so as to convey coking and dedusting ash into the mixing unit;
when the pressure gauge detects that the pressure value in the ash conveying tank is lower than a preset low value, the control unit controls the pressure supplementing valve to be opened so as to supplement conveying pressure in the ash conveying tank.
5. The coking precipitator dust and pulverized coal mixing system according to claim 4, wherein a level indicator is arranged at the top end of the ash conveying tank, and the output end of the level indicator is connected with the input end of the control unit; when the level indicator detects that the material level in the ash conveying tank reaches a preset height, the control unit controls the ash discharging valve to be closed.
6. The mixing system of coking fly ash and buggy according to claim 5, characterized in that, defeated ash can be provided with two at least, the compounding pipeline is including communicateing two defeated ash can bottom's connecting pipe, the compounding house steward that communicates with the connecting pipe and at least one be used for the compounding branch pipe with the compounding unit intercommunication, the ash valve corresponds defeated ash can setting and is in on the connecting pipe, be provided with the compounding main valve on the compounding house steward, be provided with the compounding branch valve on the compounding branch pipe, compounding main valve and compounding branch valve respectively with the control unit's output is connected.
7. The mixing system of coking fly ash and pulverized coal according to claim 2, wherein a bin top exhaust dust remover for exhausting in the dust collection bin is arranged at the top end of the dust collection bin, the bin top exhaust dust remover is connected with the control unit, and when the coking fly ash enters the dust collection bin, the bin top exhaust dust remover works.
8. The mixing system of coking fly ash and pulverized coal according to claim 2, wherein the bottom end of the ash collection bin is provided with an air inlet pipe for loosening the coking fly ash in the ash collection bin, the output end of the air inlet pipe is provided with at least two output pipes which are distributed up and down in parallel, and the output pipes are communicated with the bottom end of the ash collection bin; the air inlet pipe is provided with a pulse valve, and the pulse valve is connected with the control unit.
9. The coking dust removal ash and pulverized coal mixing system according to claim 2, wherein a pressure discharge pipe is arranged between the top end of the ash collection bin and the top end of the ash conveying tank, the pressure discharge pipe is used for communicating the ash collection bin with the ash conveying tank, and a pressure discharge valve is arranged on the pressure discharge pipe and connected with the control unit.
10. A mixing method of coking fly ash and coal powder is characterized in that the mixing method is applied to the mixing system of coking fly ash and coal powder of any one of claims 1 to 9, and comprises the following steps:
grinding raw coal into coal powder through a coal powder supply unit;
supplying coking dedusting ash through a coking dedusting ash supply unit;
introducing the coal powder and the coking dust removal ash into a mixing unit through air pressure for mixing;
and spraying the mixed coal powder out through a coal spraying unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210638961.XA CN114849506B (en) | 2022-06-07 | 2022-06-07 | Coking dust and coal powder mixing system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210638961.XA CN114849506B (en) | 2022-06-07 | 2022-06-07 | Coking dust and coal powder mixing system and method |
Publications (2)
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